Alteration of the battery of the Makita electric screwdriver for lithium. The choice of batteries

22nd February 2023

alteration, battery, makita, electric, screwdriver, lithium

Alteration of the Makita electric screwdriver for lithium

Industry has long been producing screwdrivers for a long time, and many people have old models with nickel-cadmium and nickel-metallological batteries. Turning the screwdriver into lithium will improve the performance of your device without buying a new tool. Many companies are now offering batteries to restore services, but you can do it yourself.

Convert the screwdriver to the lithium battery

Advantages of lithium-ion batteries

Nickel-cadmium batteries have a low cost, withstand many charging cycles and are not afraid of low temperatures. However, the battery capacity will decrease if you charge it without waiting for complete discharge (memory effect).

Advantages of lithium-ion batteries:

a large container to ensure a longer screwdriver operation;
smaller sizes and weight;
Holds the charge well on the standby mode.

But the lithium battery of the screwdriver does not withstand complete discharge, so the factory tools on such batteries are equipped with additional boards, which protect the battery from overheating, short circuit, reloading to avoid explosion, complete discharge. When the microcircuit is installed directly in the battery, the circuit opens if the unused battery is located separately from the device.

Difficulties with a change

Lithium-ion batteries have objective disadvantages, such as low performance at low temperatures. In addition, when converting a screwdriver in 18650, lithium batteries can occur a number of difficulties:

Standard 18650 means that the diameter of one battery element is 18 mm with a length of 65 mm. These dimensions do not correspond to the size of nickel-cadmium or nickel-metallogid elements previously installed in the screwdriver. Replacement of batteries will require their premises in a standard battery case, as well as the installation of safety chip and connecting wires;
The output voltage of lithium elements is 3.6 V, and in nickel-cadmium elements. 1.2 c. Suppose that the nominal voltage of the old battery is 12 in. This voltage cannot be provided with a sequential connection of lithium-ion elements. The voltage vibration range during charging cycles of the ion battery also changes. Accordingly, processed batteries can be incompatible with a screwdriver;
Ion batteries are distinguished by their specifics. They poorly withstand the charger voltage of more than 4.2 V and a discharge of less than 2.7 V before failure. Therefore, when the battery is disposed of in the screwdriver, a screwdriver must be installed;
The existing charger cannot be used for a screwdriver with a lithium-ion battery. You will also need to process it or buy another.

Important! If the drill or screwdriver is cheap and not very good, it is better not to process. It can be more expensive than the cost of the tool itself.

The choice of battery

Most often, 12V batteries are used for screwdrivers factors that should be taken into account when choosing a screwdriver for the lithium battery:

In such devices, elements with high discharge currents are used;
In many cases, the element capacity is inversely proportional to the discharge current, so you cannot choose it only by power. The main indicator is relevant. The value of the working current of the screwdriver can be found in the certificate of the device. Usually it ranges from 15 to 30-40 A;
It is not recommended to use elements with different containers when replacing the screwdriver battery with Li-Ion 18650;
Sometimes there are advice on using a lithium battery from an old laptop. This is absolutely unacceptable. They are designed for a significantly lower discharge current and have unsuitable technical characteristics;
The number of elements is considered based on the approximate ratio of 1 Li-Ion and 3 Ni-CD. For a 12-volt battery, you need to install 3 new ones to replace 10 old cans. The voltage level will be slightly reduced, but if you set 4 elements, the higher voltage will reduce the service life of the engine.

Important! Before assembly, it is necessary to fully charge all elements for alignment.

Dismantling of the battery body

The case is often assembled on screws, other options. with latches or glue. The glued block is most difficult to disassemble, you will have to use a special hammer with a plastic head so as not to damage the details of the case. Everything is removed from the inside. To connect the device to the charger, you can use only contact plates or the entire terminal block.

Connection of the battery

Leveling connection. Ion batteries for screwdrivers are several ways:

Using special cartridges. The method is fast, but the contacts have a large transitional resistance, can quickly collapse at relatively high currents;
Diet. The method is suitable for those who know how to solder, since for this you need to have certain skills. The solder should be performed faster, since the solder cools quickly, and prolonged heating can damage the battery;
Point welding. This is the best method. Not everyone has a welding machine, such services can be provided by experts.

Important! The elements must be connected sequentially, then the battery voltage is added, and the container does not change.

At the second stage, the wires are soldered to the contacts of the collected battery and to the protective board according to the electrical circuit. The wires with a section of 1.5 mm² are soldered to the contacts of the battery circuit itself. For other schemes, you can use thinner wires. 0.75 mm²;

A piece of the heat.shaped tube is then placed on the battery, but that is not necessary. You can also use a heat shrink on a protective circuit to isolate it from contact with batteries, otherwise sharp soldering protrusions can damage the element case and cause a short circuit.

Alteration of the Makita electrical screwdriver for lithium batteries

Alteration of electrical screwdriver for lithium batteries-Ni-CD on Li-Ion

Alteration of electrical screwdriver for lithium batteries-almost all models of the old-style screwdrivers worked on nickel-cadmium batteries. This type of battery belongs to inexpensive products, but does not have sufficient power for the scorch, in addition, it has a memorable effect.

It is this property of the battery that contributes to a gradual decrease in the magnitude of its capacity. For this reason, most owners of such an instrument are beneficial for its alteration for lithium batteries 18650 with a voltage of 12V. Of course, working with the alteration is not fast and requires some costs, but if everything is done correctly, then the final result is worth it.

Positive and negative aspects of alteration

First of all, we must clearly imagine what we will have as a result of the modernization of the electrical tool, installing lithium-ion batteries in it.

The main advantages of LI-Ion batteries:

The time of operation of the electric screwdriver from one charging is significantly increased;
The speed of charging the battery increases radically to get a fully charged Li-Ion battery, it will take about one hour;
At least twice as much as a specific container compared to Ni-CD;
savings on the acquisition of new nickel-cadmium batteries due to the short duration of their operation;
lithium batteries do not have a memorable charge effect;
the possibility of recharging as necessary.

Disadvantages of LI-Ion Battery:

lose effective properties during long.term storage, that is, the possibility of aging;
the complexity of operation at a negative ambient temperature;
the need to use a charging device specially designed for them;
high price.

Stages of preparatory work

First of all, it is necessary to find out the highest value voltage for the charge, this is done by calculating the number of elements. In the case of using three containers, the most effective voltage will be 12V, and for four. 16V.

Consider an option with an electric screwdriver designed for a voltage of 14.4V. In this case, it is necessary to apply four containers, therefore, the difference in volts is equalized and the volume of capacity increases. As a result, the tool on the LI-IN battery can work much more time.

With regard to the type of elements, the alteration of the device for lithium batteries is considered more reliable using format batteries 18650. At this stage, you need to decide on the volume of capacity and the current of discharge. Subject to the standard operation of the device, the current consumed is in the range from 5a to 10a. However, in case of an unexpected sharp decrease, its value can reach 25a. In order to protect the batteries from damage when such jumps appear, elements with discharge current 30a should be used.

Format elements 18650 having an increased discharge current

You can arrange a lithium-ion battery of eight containers, for this, two banks are combined into a parallel. Now these pairs must be connected sequentially, the main thing is that eight containers fit into the case.

When the alteration of the electric screwdriver for lithium batteries is performed, the selection of the controller is an important factor based on the working voltage and the discharge current. The battery voltage should be the same with the controller voltage, however, the current for discharge relative to the maximum should be twice as lower.

For example, this happens like this. the control device Chargage/category is calculated on a current of approximately 14A, along with this, the protection function will work with a sharp jump in the current up to 30a.

Also, in the process of remaking an electric screwdriver for lithium-accumulator, do not forget to calculate in advance the size of the protection board. It must be freely placed in the case, but if it does not fit, then you will have to increase the space of the case.

Step.by.step installation

When you have all the necessary components to remake an electric screwdriver for lithium batteries are already prepared, you can start the assembly process. In this part of the article, we will consider the reconstruction of an electrical screwdriver designed for a voltage of 12V. It included twelve nicd batteries with a voltage of 1.2V each. Our task is to replace them with li-ion.

Due to the fact that the containers are not current, then two banks were installed in parallel to ensure their correct operation.

If there is an original charger in the set, then there should be no problems with it. Devices of this type are completely suitable for Li-Ion AKB. The passage of the charge is carried out through the controller circuit. And this, in turn, completely removes the possibility of critical heating of the battery as a result of voltage throws.

If the tool was designed for 12V, then this scheme is the most suitable for assembly:

Based on the fact that new batteries are on sale within three thousand, and the cost of alteration will cost somewhere in the region of 1000, therefore, such a modernization of an electric screwdriver fully justifies itself.

Alteration of an electric screwdriver for lithium batteries

Alteration of the NI-CD battery of an electric screwdriver on Li-Ion. Colossal capacity 4400MAH!

In this entry I will tell you how I translated my electric screwdriver Makita 6271d from Ni-CD to Li-Ion Bathers.

It was not enough for this for this, so he was guided by this (in my opinion with a good) report. “Link”.

Features of alteration

In most models, at least Interskol, Makita, Hitachi present universal mechanisms. This means that the charger is designed to power batteries Ni-MH and Li-Ion.

Features are associated with the power of batteries. New and replaced products must correspond to each other. Otherwise, there will be a failure or rupture of the chain, as the indicator signals. When overloads or rupture, a red and green light blink at the same time.

In a situation where the charger is not universal, it will need alteration, as well as the power supply. The process depends on the type of ZA and the manufacturer, implying the almost complete loss of the elements of the board, the installation of the capacitor, resistors and their subsequent configuration.

Creabest 3.0Ah Li-ion Replacement Battery for Makita 10.8V, is it real?

Along with this, there is a universal way of transformation. It is associated using a BMS board stabilizing input voltage and current. On the market, it has a designation DC-DC Stepdown, and directly on the board there are tuning resistors. The module is soldered into the charger diagram using the P and P-P-P-the Charging Terms of Charging Compounds.

Alteration for lithium batteries 12 volts

The above method is used for all batteries. Voltage is determined by the parameters of the power supply. Differences are related to the number of batteries. The bulk of the transformation manuals belongs to 14 in units, where 4 lithium batteries 18650 are used to replace. For 12 in the device so many. 3 batteries 18650 will be enough here.

Alteration for lithium batteries 18 volts

A similar approach is applied to 18 volt products. Here the differences are also associated with the number of batteries. The battery consists of 5 units 18650, which provides it with beyond effective work. If the process of work is too intense, an electric screwdriver even gives the burning. Therefore, subsequently the 5th battery is often removed.

Necessary components for remaking

You must first choose the components that will help transform the electric screwdriver. The composition is determined by the features of the process, namely soldering, the use of special cassettes or spot welding. Cassettes are not recommended to use in view of their vulnerability to current exposure. Otherwise, the list includes:

batteries Li-Ion18650;
protective board or module that provides uniform load during charging;
Contact welding device. It is preferable to rations, since the lithium batteries are sensitive to heating and may fail;
wires with a cross section of 0.75 mm², 1.5 mm², 2.5 mm²;
thermal shrinkage;
screwdriver;
Disk knife.

The battery must correspond to the power of the old components in the proportion of 1/3. T.e. The lithium element is a full replacement of 3 nickel-cadmium batteries. Usually use 3 pcs. Li-Ion instead of 10 ni-mh, which will slightly reduce the power of the unit. You can install 4 batteries, but this will reduce the working resource of the electric motor.

The current indicator given in the working passport of an electric screwdriver is key importance. It fluctuates in the range of 15-40 A, accordingly, elements with similar recoil parameters are selected. This applies to both batteries and protective boards. Universal version of the BMS module at 25 A or 30 A. It is undesirable to use batteries from the old laptop, since they are not designed for high load.

Tips for the selection of lithium batteries of electric screwdriver

Before remaking the screwdriver from Nickel batteries to lithium-ion batteries, it is worth understanding the basic principles of choosing new chargers:

Often the capacity of the cans is inversely proportional to the current current, namely the current strength is the main parameter that you need to look at.
For electric screwdriver, lithium batteries with a high value of the discharge current are used. Of popular models, for example, Sony/Murata VTC 5I VTC6 are suitable. Their capacity is 3000 mAh, the discharge current is 30 A.

The use of lithium cans of different capacities is not allowed.
Old batteries from the laptop and other equipment will not work. they cannot give such a current discharge, and do not at all fit the technical characteristics.
The idea of using used elements is better to immediately set aside. Each lithium battery during the alteration of the screwdriver should have a minimum loss of nominal factory capacity.
The quantitative calculation of new cans is as follows: one lithium. ion corresponds to three nickel. Kadmiev. With a fractional number, it is better to round the smaller way. 10 nickel batteries, for example, correspond to 3.3 lithium. But you need to put it not 4, but 3. In addition to increasing power, an increased voltage is obtained, and this reduces the life of an electrical screwdriver.

The necessary tools for remaking electrical screwdriver for lithium batteries

For work at hand, the following tools will be lit up:

BMS board decrypted as Battle Management System. Without this spare part, alteration is impossible. I need a board only with a balancer, marking. 3S, 4S, 5S and so on. The number shows the number of cans for which the board is designed. The minimum current current should be 30 A.

Assembly of lithium batteries. In order not to solder cans manually, you can buy a ready.made assembly of 3, 4, 6, 8 or more copies.
For independent assembly soldering, you will need a special ribbon for soldering.
Soldering iron, clean solder, non.condensed flux.
Thermocles.
Heat.resistant tape.
An insulated wire with a cross section of at least 0.75 kV. mm to perform jumpers.
Power indicator that shows the battery charge.

The necessary tools for remaking electrical screwdriver for lithium batteries

For work at hand, the following tools will be lit up:

BMS board decrypted as Battle Management System. Without this spare part, alteration is impossible. I need a board only with a balancer, marking. 3S, 4S, 5S and so on. The number shows the number of cans for which the board is designed. The minimum current current should be 30 A.

Assembly of lithium batteries. In order not to solder cans manually, you can buy a ready.made assembly of 3, 4, 6, 8 or more copies.
For independent assembly soldering, you will need a special ribbon for soldering.
Soldering iron, clean solder, non.condensed flux.
Thermocles.
Heat.resistant tape.
An insulated wire with a cross section of at least 0.75 kV. mm to perform jumpers.
Power indicator that shows the battery charge.

Connection of the lithium battery of an electric screwdriver in one assembly

You can connect new lithium batteries into a single chain in several ways:

Cassettes, they are holders or boxes. The easiest option for which additional soldering equipment is not required. Batteries are simply installed in the holder with the appropriate poles. Disadvantage. cassettic contacts overheat from large currents and can quickly fail.

Point welding. The best way to assemble new lithium batteries in a single chain. If there is a welding machine and self.confidence, it is worth connecting just like that. The risk of damage to batteries for spot welding is much smaller than when soldering.

Important! Combine lithium batteries must be sequentially. So the container does not change, and the voltage of all cans is summarized.

Alteration of an electric screwdriver on Li-ion is a simple solution

If anyone read my previous writings, it may remember that after they gave the oak standard batteries of the electric screwdriver, and I urgently needed to continue to work, I soldered a fairly powerful converter for 8 and up to 15 and short-sized load. From 24 volts to 15 in. Two 7 Ah batteries for 12 V were connected sequentially. I have an electric screwdriver for 14.4th century.

Having cooed and tormented the entire last construction season, building formwork with this bandura, I decided that in the new season I need normal batteries.

He rumbled on the Internet, understood the marketing chip of Bosch against my native batteries. One new battery costs like the new electric screwdriver with two batteries in the set. Buying this shit for that kind of money did not make sense.

Lithium-ion batteries to my model of electric screwdriver were not. New screwdrivers for Li. In had inadequate cost. Some kind of bacchanalia of the divorce of suckers.

Then I thought I thought to remake an electric screwdriver for lithium. Lithium banks for 3.7 V, and we need 15–16 V. We will connect four acums sequentially and get 16.8 V in a fully charged form (4.2 V for a jar).

Banks of that is, separate batteries from which our battery is assembled in one large battery, I decided to take type 18650.

Such is now fashionable to use in flashlights. They are found in laptop batteries.

I took a penny with free delivery from the Chinese.

This is an AKB type Sony VTC4. Capable of giving in a load (max) as much as 30 amperes. Ideal for our goal.

Everything would be fine, but there are a dangerous thing, you can make a boom if you reload.

In addition, our separate batteries are connected sequentially and over time there will be a large unbalance, t.e. some banks will be recharge, while others, on the contrary, will not be strongly charged. As a result of which such a battery will quickly fail.

Our friends Chinese came to my aid again. There is such a thing is called a balancer. Controls the voltage in the process of charging on each individual bank and in the case of its full charging turns off it, and the rest continue to charge and so while all individual banks in our sequential chain of the battery are not fully charged.

This thing is at the Chinese in general a penny. But I took a thing from them a little more serious.

A little more expensive, but it is worth it. The fact is that these batteries have no protection. In general, I also ordered a battery controller. This thing includes a balancer that was discussed above, as well as a whole set of protection. In particular, it contains: protection against KZ, overheating protection, protection against current overload, etc.D.

B: AKB Plus;
B3: 1st battery.minus and 2nd batteries plus;
B2-: 2nd batter.Minus and 3rd battery plus;
B1-: 3 TKB.Minus and 4th AKB Plus;
B: 4th battery.minus;
P: load /charging V (to a screwdriver /or to charging);
P-: load/charging V- (to a screwdriver/or to charging).

Having gathered everything in a single heap, I tried an electric screwdriver in the case and does not work anything. What kind of garbage, did the Chinese so slipped Fuflo, but they had nothing to do with it. The point turned out to be that in the assembly process, I apparently cried out somewhere, in general, it worked out the defense, completely turning off the battery from the load.

To remove the protection (guess the type yourself, in the instructions of the seller this is not) you need to apply voltage from the load, t.e. You can just put the battery battery. Protection will be removed instantly.

Put everything in the standard battery building, having previously removed from it the old nickel-cadmium banks. Salted to contact sites. So that they do not fall out, poured this matter with armoclay.

The resulting battery normally charges the standard charging, although the voltage is not enough (it is recommended 18v), but the hands have not yet reached it. No need to worry about reloading. The controller will turn off the banks after their full charge.

Homemade Li-Ion battery for an electric screwdriver turned out to be 2.1 Ach (2100mach). Against the standard capacity of 1.2 ah. At the same time, the new battery weighs three times less.

Puttered the product on disassembling the formwork of the ceilings. Just super, the result is very pleased. It works fine, not to sit down for a long time, it pulls powerfully.

When you forget to put an effort on an electric screwdriver (drilling mode), especially when it lies, then with large loads of the engine that is stopping, protection is triggered. I don’t know well or not very.

If you also take a balancer, but a full controller, then take a larger load on the current, otherwise you get out of the protection. Or look for a controller with a car.

At first I took the second old akum with me, connecting to it I took off my defense. Then he made a button that switching the circuit into the mode of operation directly without a controller and simultaneously removes protection using the voltage of the battery itself.

If you want, you can buy banks for a large container, but be careful in this regard for continuous fakes. The seller from whom I took and constantly take I already verified and he has the declared capacity corresponds to the real.

Alteration of the screwdriver for lithium battery

Most people with an electric screwdriver at Ni-CD or Ni-Mn are familiar with the situation when the batteries lose their capacity after a long time. And not only because of the life resource of the battery, but also because of the effect of memory.

Its meaning is that the lying a long discharged battery remembers the level of charge and subsequently does not charge until its nominal capacity. And to keep the battery of constantly charged is unlikely someone will be.

Some try to restore old batteries or collect from two bad one normal.

I went on the other way. Now quite common Li-Ion batteries are.

They do not have such an effect of memory and for those who do not every day use an electric screwdriver ideal option for storing in a completely charged state.

Another plus is that they have a large container compared to nickel batteries with the same size. For comparison, the standard AB was 1.3 Ah, and made by yourself 5.2 ah. About her and will go further.

First you need batteries. And not simple, but high.precision. They are able to give large currents to about 30 A. All purchases were made on Aliexpress. Next, you need a battery control board.

It controls many parameters that are presented in the table. And also do not forget about the fee. I chose on LM2596. This is really a good charger.

I used to charge assembly from 6 x Li-Ion batteries (25.2 V; 2800 mA/h).

Instructions for configuring ZU

We connect to the PSU, in which the voltage is at least 1 in higher than can give the assembly from the batteries. For example, for assembly of 6xli-ion, a BP with a 26.2V release is needed. The output current of the BP depends on the charging current of the battery.
On xx, we adjust the desired output voltage corresponding to the maximum voltage of the battery in a charged state. In my case. 25.2 V.
We connect the battery to the memory, in the gap between them the current meter. set the desired charge current. I installed 1 and for the battery with a capacity of 2800 mA/h.
With a decrease in charging current to 0.1 x charge current, we twist the average multi.turn to the ignition of the blue LED. “Charging is over”.

Everything corresponds to the clumsy description)). Works great. I will use to charge the converted electric screwdriver. Samara reached 25 days.

For those who cannot figure out the work of LEDs, I found an excellent description:

The top burns while the converter is able to give the installed current in the load (in the case of use as a charger it turns out this is the SS phase indicator, as soon as it goes out. the CV phase has gone) the average LED is on until the load in the load does not drop to 0.1 established, went out. the charge is over.

1 is established by default, if desired, it is adjusted as a larger (the charge is faster, the capacity is smaller) and the lesser (charge increases, the battery is charged more fully) with the average potentiometer. But the charge continues after turning it off, this is only an indicator, that the battery is basically charged and ready to use. Lower LED. just indicator indicator indicator.

charge. this indicator burns while the current in the output circuit is higher than the given value. This value is set relative to the maximum current. When installing a large maximum current (unit of amperes), it may not be possible to set an indication on a small current (units and tens of milliamps).

Lithium batteries

Then I bought 10 lithium batteries and collected batteries from them 2 pieces in parallel, and then connected 5 of the resulting blocks in series.

The connection of the batteries was carried out by soldering using pre.tied copper plates.

For soldering you need one basic rule. do not overheat the battery! Therefore, you need to solder a powerful soldering iron and as soon as possible in 1-2C. If it was not immediately better to wait and do not boil the battery.

Who has spot welding. there will be no problems with the connection. As a result, a battery for a voltage of 21 V and a capacity of 5.2 ah gathered. Connection of the battery to the control board is shown in the figure.

Next, everything is packaged in the case and checked under load.

In standard charging, I built the module on LM2596. The power supply should be a couple of volts more than the voltage of the charged battery. Set the voltage at idle 21 in.

Then connected the battery and set the charging current 0.8 a. Why such? Because there was a power supply for 24 V s max. current 0.8 a. Did not specially purchase. Let it enjoy better longer.

This is not a production, but the home version of the tool.

In the process of charging, a small minus was revealed. Upon reaching the voltage of the full charge of the ZU, it should be transferred from the CC phase to the CV phase. That is, first, the battery is charged with a set current (0.8 A in my case), and when 21 V, the voltage is maintained at this level, and the current gradually drops to 0.1IUST (in my case 0.08 A is set by the average potentiometer).

The charging process stops on this. The average LED signals this in this module, but it only signals that the battery is ready to work, but in fact charging continues, which in principle is not critical. The battery still will not recharge. And the downside is that due to the fact that the control board has its protection against recalculation, it turns off the visa without reaching the CV phase.

To get around, it was necessary to reduce the voltage of the Module of the ZU to about 20.7-20.8 V. The CV phase begins earlier, but in any case, the battery charges more fully than without it at all. If you do not know about this with a small shortage, then you will not notice the difference during operation.

Text video

A simple way to remake a charger Makita DC1414T is part 2 of the video. In the first part, the redemption on Li-Ion batteries of the Makita 6280D electric screwdriver of the electric screwdriver. Zener diode for stabilization voltage 15 V: KS515A, D815E, 1N4744A, BZG04-15, I ask for viewing!

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Alteration of an electric screwdriver for lithium with your own hands

Greetings, homemade! Almost everything can be found on a flea market, from old.fashioned items, to quite good power tools. And during the next trip to the local flea market, the author of the YouTube channel “AKA KASYAN” acquired such an electric screwdriver for only 1000.

The choice fell on this electric screwdriver since, firstly, it is almost new, secondly, a full set with two batteries and a charger, and thirdly, who will refuse this offer for such a ridiculous price.

There was also the fourth reason. The fact is that this is not just a two.speed electric screwdriver, in addition, there is still a drilling mode with a blow. In cheap screwdrivers, this is quite rare, and good with this option are many. Naturally, a modest mechanism of impact in any comparison does not go with the pneumatic mechanism of the peorator, but there is a shock mechanism and this is a pleasant bonus.

Included with this electrical screwdriver were 2 ancient nickel-cadmium batteries for 14.4V.

The tool is based on the 550th motor. Shurik is quite bulky and heavy, but such tools also have a place to be. Such an electric screwdriver can be used where long.term autonomous operation is needed and a large torque is needed.

In general, in this article we will talk about the alteration of this power tool. The essence of the alteration is to replace old nickel-cadmium batteries with lithium-ion. over, the capacity of the new battery should be at least a couple of times more than that of the old, which will significantly increase the time of the autonomous operation of an electric screwdriver. We will also collect a new charger for lithium batteries. Charging should be powerful enough so that you can easily charge a large capacity battery in a maximum of a couple of hours plus or minus.

1) batteries 18650; 2) protection board; 3) heat.resistant tape; 4) heat.resistant wires; 5) fasteners for 18650

The battery also consists of lithium-ion elements of the 18650 standard in the amount of 6 pieces. Each two banks are connected in parallel to increase the container and current of return, and 4 assemblies of 2 cans sequentially, to increase the total voltage. In other words, this is a 4s2r battery.

The parameters of the battery are as follows: voltage 14.8V, capacity of 4000 mam, banks, of course, is desirable to use high.voltage with a return current of 15 to 30A.

If you plan to use the former batteries, then it is important to choose banks with the same internal resistance. over, the less this resistance, the better.

The technical documentation of the battery data says that the bank can be discharged with the maximum current to 4.5a, and short.term current to 8a. The peak current of the discharge is 14a, but not more than 4 seconds. In our battery, 2 banks in parallel, that is, the maximum discharge current can be up to 9a, short.term up to 16a, peak up to 28a, respectively. To install batteries, holders were printed on a 3D printer.

Of course you can buy exactly the same on Aliexpress literally for a penny, and besides, their quality will be much better.

Protection payment. Without this thing, you can not put the lithium batteries into operation. Such a scarf protects the battery from deep discharge, redesigning and short circuits. In this case, an inexpensive protection board for 4 cells of the lithium-ion battery was applied. The current protection current is 15A.

It is advisable to connect the batteries using a nickel tape and apparatus for contact welding, but you can use, for example, several layers of tinned copper tape, these are used to connect solar modules. When soldering, the main thing is not to overheat batteries.

You need to solder enough. The process of soldering one patch should not exceed 2-3 seconds.

To connect the protection board, you must use wires in heat.resistant silicone insulation.

We fasten the protection board to the battery through the isolator and fix it using the sealant.

Text video

A simple way to remake a charger Makita DC1414T is part 2 of the video. In the first part, the redemption on Li-Ion batteries of the Makita 6280D electric screwdriver of the electric screwdriver. Zener diode for stabilization voltage 15 V: KS515A, D815E, 1N4744A, BZG04-15, I ask for viewing!

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Alteration of an electric screwdriver for lithium with your own hands

Included with this electrical screwdriver were 2 ancient nickel-cadmium batteries for 14.4V.

The tool is based on the 550th motor. Shurik is quite bulky and heavy, but such tools also have a place to be. Such an electric screwdriver can be used where long.term autonomous operation is needed and a large torque is needed.

1) batteries 18650; 2) protection board; 3) heat.resistant tape; 4) heat.resistant wires; 5) fasteners for 18650

The parameters of the battery are as follows: voltage 14.8V, capacity of 4000 mam, banks, of course, is desirable to use high.voltage with a return current of 15 to 30A.

If you plan to use the former batteries, then it is important to choose banks with the same internal resistance. over, the less this resistance, the better.

Of course you can buy exactly the same on Aliexpress literally for a penny, and besides, their quality will be much better.

You need to solder enough. The process of soldering one patch should not exceed 2-3 seconds.

To connect the protection board, you must use wires in heat.resistant silicone insulation.

We fasten the protection board to the battery through the isolator and fix it using the sealant.

Alteration of the Makita electrical screwdriver for lithium batteries

Alteration of electrical screwdriver for lithium batteries-Ni-CD on Li-Ion

Alteration of electrical screwdriver for lithium batteries-almost all models of the old-style screwdrivers worked on nickel-cadmium batteries. This type of battery belongs to inexpensive products, but does not have sufficient power for the scorch, in addition, it has a memorable effect.

Positive and negative aspects of alteration

First of all, we must clearly imagine what we will have as a result of the modernization of the electrical tool, installing lithium-ion batteries in it.

Makita DF012D Electric Screwdriver Review

The main advantages of LI-Ion batteries:

The time of operation of the electric screwdriver from one charging is significantly increased;
The speed of charging the battery increases radically to get a fully charged Li-Ion battery, it will take about one hour;
At least twice as much as a specific container compared to Ni-CD;
savings on the acquisition of new nickel-cadmium batteries due to the short duration of their operation;
lithium batteries do not have a memorable charge effect;
the possibility of recharging as necessary.

Disadvantages of LI-Ion Battery:

lose effective properties during long.term storage, that is, the possibility of aging;
the complexity of operation at a negative ambient temperature;
the need to use a charging device specially designed for them;
high price.

Stages of preparatory work

Consider an option with an electric screwdriver designed for a voltage of 14.4V. In this case, it is necessary to apply four containers, therefore, the difference in volts is equalized and the volume of capacity increases. As a result, the tool on the LI-IN battery can work much more time.

Format elements 18650 having an increased discharge current

When the alteration of the electric screwdriver for lithium batteries is performed, the selection of the controller is an important factor based on the working voltage and the discharge current. The battery voltage should be the same with the controller voltage, however, the current for discharge relative to the maximum should be twice as lower.

Step.by.step installation

Due to the fact that the containers are not current, then two banks were installed in parallel to ensure their correct operation.

If the tool was designed for 12V, then this scheme is the most suitable for assembly:

Alteration of an electric screwdriver for lithium batteries

Alteration of the NI-CD battery of an electric screwdriver on Li-Ion. Colossal capacity 4400MAH!

In this entry I will tell you how I translated my electric screwdriver Makita 6271d from Ni-CD to Li-Ion Bathers.

It was not enough for this for this, so he was guided by this (in my opinion with a good) report. “Link”.

Alteration of the Makita electric screwdriver for lithium

I will not say anything new in this article, but I just want to share the experience of updating the batteries of my old screwdriver Makita. This instrument was originally designed for nickel-cadmium batteries (which died a long time ago, since they died, and those that were acquired in exchange were the same). NII-CD deficiencies are known: low capacity, short service life, high price. Therefore, manufacturers of battery tools have long switched to lithium-ion batteries.

Well, what about those who have an old tool? Yes, everything is very simple: throw off the Ni-CD jars and replace them with Li-and in a popular format 18650 (marking denotes a diameter of 18 mm and length 65 mm).

What kind of fee is needed and what elements are needed to convert a lithium-ion screwdriver

So, here is my battery 9.6 in 1.3 ah. With maximum charging, it has a voltage of 10.8 volts. Lithium-ion elements have a rated voltage of 3.6 V, maximum. 4,2. Therefore, to replace old nickel-cadmium elements with lithium-ion elements, I need 3 elements, their operating voltage will be 10.8 volts, maximum. 12.6 volts. Exceeding the nominal voltage in no way damage the engine, does not burn, and you do not need to worry about a big difference.

Lithium-ion elements, as everyone knows for a long time, does not like reloading (voltage above 4.2 V) and excessive discharge (below 2.5 V). With such excesses of the working range, the element is destroyed very quickly. Therefore, lithium-ion elements are always combined with an electronic board (BMS. battery control system), which controls the element and controls the upper and lower voltage limits. This is a protective board that simply turns off the battery from the electric circuit when the voltage goes beyond the permissible range. Therefore, in addition to the elements themselves, you will need such a BMS board.

Now there are two important points with which I could not experiment several times until I came to the right choice. This is the most allowable working current of the lithium-ion elements themselves and the maximum operating current of the BMS board.

In a screwdriver, working currents with a large load reach 10-20 A. Therefore, it is necessary to buy elements that can produce high currents. Personally, I successfully use the 30-ampere 18650-core production of Sony VTC4 (2100 mAh) and the 20-ampere Sanyo UR18650NSX (2600 mAh). They work great in my screwdrivers. But, for example, Chinese Trustfire 2500 mAh and Japanese light green Panasonic NCR18650B are not suitable for 3400 mAh, they are not designed for such currents. So do not chase the capacity of the elements. Even 2100 mAh is more than enough; The main thing is when choosing. Do not count with the maximum permissible discharge current.

And in the same way the BMS board should be estimated at high working currents. I saw on YouTube how people collect batteries on boards for 5 or 10 A. Personally, I don’t know when I turned on the screwdriver, such boards immediately went to defense. In my opinion, this is a waste of money. Let me say that Makita puts 30 ampers in the battery. Therefore, I use the 25-ampere BMS purchased on AliExpress. They cost about 6-7 and are looking for BMS 25A. Since you need a board to assemble three elements, you need to look for a board called “3S”.

Another important point: some boards may have different contacts for charging (marked with the letter “C”) and loads (marked with the letter “P”). For example, the board may have three contacts: “p-”, “p” and “c-”, as on the native lithium-ion board of Makita. Such a board will not suit us. Charging and unloading (charging / discharge) should be carried out through one contact! That is, there should be 2 working contacts on the board: just “plus” and just “minus”. Because our old charger also has only two contacts.

In general, as you already guessed, my experiments threw a lot of money on both wrong elements and incorrect boards, making all the mistakes that could be made. But he gained invaluable experience.

How to calculate the parameters of a new battery

The resulting operating voltage from 12 V to 14 V is more than enough. Even relatively fresh regular Ni-CA batteries rarely give out more than 12 volts.

If the volume allows, you can simultaneously connect 2 sequential assemblies of 4 batteries, increasing the battery capacity twice. At the same time, mutual location can be anything. in the shape of the case. The main thing is to ensure a reliable connection of wires.

Nickel-metallogids “Makstar

These models are made according to the manufacturer nanotechnology. Due to the digital exchange of information, the battery is connected to a charger.

This property helps to quickly charge the battery, and also extends its service life. The linear series has medium.voltage products, but there are also batteries for 24 in.

The base is a NI-MH battery equipped with the necessary sensors, as well as a special charger. During operation, the charger reads all the operating conditions of the battery, and then selects a more favorable mode for charging.

Sources:

https://veloelektro.ru/peredelka-shurupoverta-Makita-na-litij.html
https://tehnopanorama.ru/instrumenty/zamena-akkumulyatorov-v-shurupoverte-na-litievye.html
https://myinstrumenty.ru/elektroinstrument/peredelka-shurupoverta-na-litievye-akkumulyatory/
https://myinstrumenty.ru/elektroinstrument/peredelka-shurupoverta-na-litievye-akkumulyatory/
https://auto-gl.ru/peredelka-akkumulyatora-shurupoverta-na-litievye-batarei/
https://tool-and-tools.ru/dreli-i-shurupoverty/dc1414t-peredelka-pod-litij.html
https://tool-and-tools.ru/dreli-i-shurupoverty/dc1414t-peredelka-pod-litij.html
https://veloelektro.ru/peredelka-shurupoverta-Makita-na-litij.html
https://domdetaley.ru/peredelka-surupoverta-Makita-na-litij/

Articles alteration, battery, electric, lithium, makita, screwdriver