How to disassemble a laptop battery

Self-repair of a laptop battery is advisable only if the controller board is in working condition. If the controller is broken or blocked, reprogramming of the controller is required to restore this battery, and it is cheaper to do it in a specialized repair service, since programming only the battery will not pay back the cost of the programmer and software.

Why may need to disassemble the battery

Most often, a laptop battery disassembly is required for its repair, which consists in replacing lithium cells with new cans. As a rule, 18650 batteries are installed as lithium batteries. Often, this repair is called "repacking" the battery. This makes it possible to significantly save on the purchase of a new laptop battery. But in some cases, the savings are insignificant, since it is the new lithium batteries that charge the main cost.

But the implementation of this repair will be useful if there is a very old device in stock, to which manufacturers no longer produce batteries. If you do not plan to purchase a new laptop in the future, then repacking will be able to help. Since the 18650 battery, in contrast to the assembled battery, has a single standard, it is completely unproblematic to purchase new elements for replacing old ones.

In some cases, laptop battery disassembly may be necessary for people who are addicted to electronics. Such lithium cells can be further used to power the equipment in different devices.

Reference! In laptop batteries, all lithium cells are connected in two parallel circuits, which in turn are connected in series with each other. The charging sensor regulates the performance of all individual elements, and if one bank is inadmissible, it can block all battery operation. Often there is a situation when, due to a significant variation in performance, certain elements of a non-working battery are still “viable”.

What you need for disassembly

Disassembling a rechargeable battery is usually not trivial and often requires only ingenuity and certain skills. For example, before you start disassembling, you can watch training videos with disassembling different laptop batteries from different manufacturers. The more carefully you get to remove the internal elements, the easier it is then to reassemble the entire structure.

To disassemble the battery will only need a clerical or any other sharp knife. We must not forget that not all batteries are collapsible, and if even more accurately - often non-separable. Such a case will be described.

Important points before disassembling the battery

If it is definitely determined that the laptop battery is already inoperative, then it is necessary to determine the state of each individual item. What will be needed multimeter.

Measurements are first taken to bypass the controller: if the indicator is equal to or greater than 3.7 multiplied by the number of all elements, then the problem lies in the controller.

The controller is needed to adjust the process of charging and discharging, while protecting the device from possible overloads. If the elements are OK, but in general, the assembled battery does not hold the voltage, then the reason is in the controller, which simply does not see the cans.

In this case, you can use the option of reprogramming the controller (of course, if there are no mechanical deformations). But to re-flash the controller will require special equipment. Do not perform such an operation on your own at home. But it is possible to determine the workable elements.

If the controller is working, during the “pinging” of each individual bank, the working elements are determined, and the non-working ones are discarded.

Disassembling the battery from the laptop: step by step

The case of a monolithic battery pack consists of two parts, which are connected to each other in the manufacture using hot pressing. It is necessary to cut the block along the joint. To make it easier to cut, the knife blade can be slightly heated. The cutting depth should not exceed 2.5 mm, so accidental damage to the battery cells can be avoided. Therefore, no need to hurry.

When both parts are disconnected from each other, you can see the individual elements in the film. However, they are arranged in strict sequence. The number of cylindrical cans can be from 6 pieces.

Battery replacement

You can replace the bad batteries with new ones and return the device to a working state. But in this case it is important to ensure that the figures of the new cans are absolutely identical with the old ones. How can this be done if the old elements have significant wear? Only with the help of special equipment. Either all banks are replaced, not individual parts.

Replacing batteries is hard work that requires certain skills. Not all the time it is possible to solder separate parts of quality, and for welding special tools will be needed. Also, it is not excluded that the controller will need to be flashed if all the elements have been replaced with new ones.

Practical use of rechargeable batteries

Since such a difficult work has been done, it is necessary to take advantage of this.

Each individual bank in a laptop battery is a lithium battery. Its capacity is not enough to "pull out" the work of the device. But each bank separately, even if it has a certain amount of wear, can quite cope with low-power devices. For example:

  • headlight for bicycle;
  • an autonomous lamp for installation in an entrance or at the dacha;
  • lighting device for hiking or fishing.

Attention! Old lithium batteries can be given a second life in any other low-power devices.

Taking into account the instructions described above, you can open the laptop battery without damaging its internal elements.

Watch the video: How to open laptop battery without destroying it. Disassembly HP laptop battery pack. (March 2024).

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