How to charge a lithium battery of an electric screwdriver.

Methods of charging the battery of an electric screwdriver without charging devices

The charger included in the set of electrical screwdriver is considered the most durable device in the delivery set. There are various cases when Zah suddenly failed or just lost. There are no big problems with the acquisition of a new one, but sometimes the situations do not tolerate delay and it is necessary to charge the Single Boar of the screwdriver without native charging. Or simple in work is unacceptable, and ZU is purchased via the Internet. here the delivery time can take several days. In such cases, you can try alternative devices to replenish the energy supply of battery.

Controller when charging the battery. the node is not the main. But very important. It supports the replenishment modes of energy reserves and does not allow reloading (and sometimes overheating), can automatically conduct training cycles, and measure the battery parameters. These modes are different in each of the three types of batteries used in screwdrivers:

Non.compliance with the prescribed modes reduces the service life of the battery and does not allow the use of the capacity completely. In the absence of a controller, it will have to adjust the output parameters of the item on your own throughout the process.

Repair of the charger

With their own hands, eliminate simple malfunctions. An example of the repair is shown at 12V DA-10/12Er station for lithium-ion batteries with a voltage of 12 V, current 1.8 A. The device consists of a lowering transformer, a four.a.a.axle bridge that smoothes the condenser pulsation. LEDs signal the power supply, beginning and end of the charge.

If the inclusion indicator does not light up, check the primary winding of the transformer. To do this, measure the resistance by the tester, touching the probes of the pin of the fork. If there is a cliff, open the body. Perhaps a network fuse has burned, which is changed.

On some models of the ZU, a thermal fuse is installed. It is located on top of the primary winding of the transformer under insulation, tears the circuit at a temperature of 120 130 ° C. Recovery is impossible, they act in another way: the ends of the windings are connected by soldering. After this operation, the transformer is not protected from short circuit, so it is better to put a network fuse.

With a whole primary winding, secondary and diodes are nicknamed. One end of the semiconductors are dropped, connected an ohmmeter, changing the position of the probes. A working diode shows a break during one connection, with another. KZ. The blocked primary winding is not subject to repair. the transformer is changed.

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If faulty diodes are found, new. The capacitor is also changing at the same time: if the electrolyte dries in it, the diodes are overloaded, burned.

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Under the magnifying glass, the board is inspected. Eliminate detected cracks, disturbed contacts. If all the measures taken did not help, they contact the workshop.

Features of charging batteries

How to correctly charge the battery of an electric screwdriver so that it serves as long as possible?

Before the first use of the battery, it is required to charge, since they are discharged during storage. In order for the battery capacity of an electric screwdriver to become as possible for the nickel-cadmium element, its three-time charging and subsequent discharge is recommended. Thus, since the new battery has incomplete capacity, it must be brought to the working full capacity. After that, the batteries will need to be charged as soon as their power becomes minimal. Lithium-ion batteries are more easy to use. They do not have a memory effect, so you can not bring them to complete discharge and charge them when it is convenient.

When charging, you need to take into account the optimal temperature regime of the process. It is better that the ambient temperature is above ten degrees and does not exceed forty. During charging, the batteries sometimes heat up, but this should not be, since overheating negatively affects their work, and you need to cool them. It is undesirable to leave the battery in the charger device. Yes, and it is better to store them, disconnecting from the screwdriver, separately from the tool itself. If the batteries are not used for a long time, they should be recharged once a month.

It is better to buy batteries at specialized points of sale. Proper operation will help increase their service life. It is undesirable to completely discharge elements during operation to stop the engine. The fact that they need charging will indicate their markedly reduced working characteristics.

Features of charging batteries of different types

Differences in the charging of batteries are associated with the properties of materials from which the battery is made. Devices for replenishing the container are pulsed and ordinary. Professional power tools are the first to supply, and the latter are complete with household screwdrivers.

There are three types of batteries in total:

  • Nickel-cadmium. Differ in a pronounced memory effect. After buying, they must be charged and discharge 3 times. Only in this way will the largest battery capacity be achieved. Subsequent charging should only be carried out after the complete charge of the charge.
  • Nickel-metallological. Also have a memory effect. A similar procedure is recommended to perform 4 times. Further recharging is carried out arbitrarily.
  • Lithium-ionic. These batteries are the most unpretentious. They are able to not change their original capacity for a long time. They can be charged as you like.

Recommendations for storage of batteries

It is recommended to store batteries of any type by disconnecting from electric screwdriver. Each type of battery also has its own characteristics in this regard:

  • Nickel-cadmium nutrition elements must be discharged before storage to such an extent that the electric screwdriver does not work at all its power;
  • Nickel-metallological batteries are recommended to be kept completely charged, but still a small discharge is allowed;
  • Before putting a lithium-ion type battery for storage, it also needs to be discharged, but only half.
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After a long period of storage of nickel-metallological nutrition elements, capable of withstand from 200 to 300 reloading cycles without loss, it is necessary to recharge within the day. Blocks of this type are characterized by a significant parameter of self.discharge.

As mentioned above, lithium-ion nourishing elements are deprived of the “memory effect”. They have a large capacity and the lowest self.discharge indicator. You can replenish their charge at any time, despite the degree of discharge.

It is not completely necessary to discharge Li-Ion batteries, because this can cause a disconnection of the built-in electronic protection system from increasing temperature or voltage.

To achieve 50 % of charging necessary for proper storage, lithium-ion batteries must be charged from an almost zero level over a period of about 65 % of the time that is required to set the full capacity.

Compliance with the simplest recommendations for storing and charging of batteries of different types will allow the development of the entire resource of the power elements laid in them by manufacturers.

The impact of external factors on the battery

In the kit, each screwdriver necessarily applied instructions on how to charge the battery. In particular, this applies to expensive models. In this case, the process can be performed both indoors and in street conditions.

Additional Information. Charging nickel-cadmium power sources with capacity indicators of 1.2 a h will take about 7 hours.

Before putting an electric screwdriver for charging, it is worth considering a number of important nuances. It is necessary to avoid direct contact of the power tool or its battery with moisture in any form. rain, snow, high humidity level. This inevitably leads to a violation of electrical conductivity, including the development of rust.

charge, lithium, battery, electric

The impact of direct rays of the sun also destructively affects the state of both the battery and the entire tool. This is especially true for the period of summer operation, when the air temperature rises to 40, or even more. Result. overheating of the device, violation of electrical contact. This process cannot be immediately noticed and the symptoms will appear over time.

Exploitation

Li-Ion Elements are most convenient for the user. They have practically no memory effect. This means that the battery can begin to be charged at any time (it is not necessary to wait for the discharge to zero) and to any level (not necessarily to the full). There are other restrictions (in temperature, on charging current), they are described in other sections of the review.

The average amount of charging cycles

The battery.based battery resource in a cyclic mode (and this mode is characterized by elements that feed portable gadgets, battery power tools, etc.P.) determined by the number of cycles of the charge-discharge. This amount is not so easy to calculate, because it depends on different conditions (the depth of the category, etc.P.). It is believed that the majority of Li-Ion elements serve 250-500 cycles, and only the most modern can work up to 1000 cycles without a noticeable loss of capacity.

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How to achieve the maximum number of cycles

Mainly reduces the life of elements based on lithium high temperature. Hence the main rule. not let the battery be heated above 50 degrees. Must be avoided as external (from direct sunlight and t.P.), and internal heating (from a high charger and t.P.). But a decrease in temperature to zero and lower for such batteries is not at all useful.

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In the global network, it is common that it is necessary to not discharge the battery to the level of zero to extend the resource (energy should start from 10-15%) and not allow to charge up to 100%(90%enough). This opinion is very doubtful. It is not confirmed by a description of the processes occurring in the element, nor statistics. In addition, there is no logic in it. if you charge the phone more often, then perhaps the number of cycles will increase, but the working hours in each of them will be less, and the extension of the resource is not obvious at all. But there is no harm in this mode, so if the user has a desire, he can operate the battery according to such a schedule. Faith in some cases works miracles.

Safety and precautions

Before you charge something, you need to familiarize yourself with safety precautions. This will help prevent possible problems that may appear in the process of recharging the tool battery.

It is necessary to adhere to the following recommendations:

  • The process must be constantly monitored. As soon as charging the battery is over, the procedure must be completely stopped. The fact is that as a result of overflow, lithium components can boil. Their temperature indicators increase sharply, which can lead to an explosion.
  • It is necessary to ensure that all elements of the network are correctly included. Particular attention should be paid to the polarity and technical characteristics of the battery.
  • If the characteristics of the modules differ from each other, the battery cannot be charged for too long.

Additional Information! The recharge duration largely depends on the type of battery. On average, the procedure lasts about 3-4 hours. However, some batteries can only recharge after 7 hours.

How to charge the battery correctly

When buying a new tool with a nickel-cadmium or nickel-metallogid battery before operation, the battery is completely discharged and charged three times (pumped). When using an electric screwdriver, the battery is not put on charging until it is completely discharged. Then the pumping is repeated periodically, as a preventive measure.

Important! So that there are no downtime in the work, you need to have a spare battery.

charge, lithium, battery, electric

Upon reaching the full charge, Ni-MH and Ni-CD batteries disconnect from the network (the controller does this in lithium-ion). With a long break in the operation, the battery is removed and stored separately from an electric screwdriver.

With a neat circulation, following the manufacturer’s instructions, the battery will work for a long time and will not require early replacement. And minor repairs can be done with your own hands.

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