How to disassemble a laptop battery: important points, step by step

It is advisable to repair the laptop battery independently, only if the controller board is in working condition. If the controller is broken or locked, then to restore this battery requires reprogramming the controller, which is cheaper to do in specialized repair service, since programming only the batteries will not work to recoup the cost of the programmer and software providing.

Why battery disassembly may be required

Most often, disassembling a laptop battery is required to carry out its repair, which consists in replacing lithium cells with new banks. As lithium batteries, 18650 batteries are usually installed. Often, such a repair is called “repackaging" the battery. This makes it possible to significantly save on the purchase of a new laptop battery. But in some cases, the savings are negligible, since it is the new lithium batteries that tighten 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, unlike the assembled battery, has a single standard, it is completely unproblematic to purchase new elements to replace the old ones.

In some cases, disassembling a laptop battery may be necessary for people who are addicted to electronics. Such lithium cells can be further used to power 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 with an unacceptable deviation of one can, it can block all battery operation. Often there is a situation when, due to a significant dispersion of indicators, certain elements of an inoperative battery are still “viable”.

What you need to disassemble

Disassembling the battery, as a rule, is non-trivial and often requires only ingenuity and certain skills. For example, before starting the disassembly, you can watch training videos with disassembling different batteries of laptops from different manufacturers. The more carefully it is possible to extract the internal elements, the easier it is then to reassemble the entire structure.

To disassemble the battery, you only need a clerical or any other sharp knife. We must not forget that not all batteries are collapsible, and even more accurately, they are most often collapsible. This is exactly the case that will be described.

Important points before disassembling the battery

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

First, measurements are taken bypassing the controller: if the indicator is equal to or greater than 3.7 times the number of all elements, then the problem lies with the controller.

The controller is necessary to adjust the charge and discharge process, while protecting the device from possible overloads. If everything is in order with the elements, 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 (naturally, if there are no mechanical deformations). But to re-flash the controller, you will need special equipment. You cannot perform such an operation yourself at home. But it is quite possible to determine workable elements.

If the controller is operational, during the "ringing" of each individual bank, the working elements are determined, and non-working ones are thrown out.

Laptop battery disassembly: step by step

The body of the monolithic battery pack consists of two parts that are connected to each other during manufacture by hot pressing. Cut the block at the junction. To make it easier to cut, the blade of the knife can be slightly heated. The cutting depth should be no more than 2.5 mm, so accidental damage to the battery cells can be avoided. Therefore, do not rush.

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

Battery Replacement

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

Replacing batteries is a painstaking job that requires certain skills. Not all the time, it is possible to solder individual parts in high quality, and for spot welding you will need a special tool. It is also possible that the controller will need to be flashed if all the elements have been replaced with new ones.

Practical use of batteries

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

Each individual can in a laptop battery is a lithium battery. Its capacity is not enough to "pull" the device. But each can individually, even if it has a certain wear, will be able to cope with low-power devices. For example:

• headlight for a bicycle;
• self-contained lamp for installation in the porch or in the country;
• lighting device for hiking or fishing.

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

Based on the instructions described above, you can open the laptop battery without damaging its internal elements.