How to disassemble a round laptop battery with your own hands. How to disassemble an Asus laptop battery: repair without disastrous consequences

The design of batteries for Asus laptops is unlikely to interest anyone except inquisitive children. However, the idea of seeing what is inside the battery occurs to even the most incurious adults when the laptop suddenly turns off and the battery itself barely holds a charge. The desire to fix the battery yourself is especially acute when calibration and removal of extraneous background programs do not produce results. Of course, you can immediately buy a new battery, but you don’t always have the money for that. For those who are familiar with electrical engineering, there is one interesting and budget option: try to disassemble and restore its capacity by replacing faulty batteries.

There are two signs that it is time to restore the battery:

The battery capacity is only enough for 5-15 minutes of battery life, although previously it was at least 2-3 hours.
The battery completely stopped holding a charge and as soon as the laptop is disconnected from the network, it turns off completely.

Does your situation exactly match yours? This means that the problem is really serious and it’s time to solve it. Before you start disassembling an Asus battery, it makes sense to find out how it works - this will significantly increase the chances of a successful repair.

"Stuffing" of the Asus laptop battery

A laptop battery or battery is the main element that distinguishes a laptop from a desktop computer and allows you to use the gadget autonomously. The battery is a plastic case in which from 4 to 12 batteries are located in pairs. They look like AA batteries, only bigger. Another mandatory element of the battery is the controller board, which is responsible for the battery charging algorithm.

In principle, the batteries of all Acer laptops have a similar “structure”, but there are a number of models that differ from the rest - these are laptop batteries, and. They have their own characteristics, which we will talk about in one of the following articles.

Let's start doing magic, or the process of disassembling an Asus battery

To avoid distractions during the process, prepare everything you need before starting the repair:

a multimeter (tester) with which you will measure the voltage on each battery;
a knife or flat screwdriver, which is convenient for disconnecting the battery case;
new batteries. You can buy them both in a radio store and on the Internet. The rated battery capacity is indicated in the user manual for your Asus laptop or on the battery itself;
tool for soldering batteries;
car light bulb for discharging elements;
glue for connecting the plastic parts of the battery.

Now you can start “opening” the battery and replacing the batteries:

Completely drain your Asus laptop battery and remove it.
Place the battery on a flat surface. Insert a knife (screwdriver) into the longitudinal seam on the side of the battery, separate the part into two parts. Be careful: the knife blade should not go deeper than 2-3 mm, otherwise the batteries may be damaged.
It is better to photograph the location of the batteries - the photo will be useful during the assembly process.
“Ring” each element with a multimeter. Normally, the voltage should be between 3.7-4.1 volts. If some “batteries” have a lower voltage, they need to be replaced.
Before placing batteries in the circuit, discharge them using a car light bulb. This is necessary so that all “banks” have the same potential and are charged evenly.
Connect the batteries in order from ground to positive. The picture taken earlier will help you assemble the chain correctly.
Having soldered all the elements, lubricate the body parts along the seams with glue and connect them. Wait until the glue dries, insert the battery into your Asus laptop and put it on full charge.

Have you read the instructions provided and are ready to get down to business? Good luck! If you now understand that this option is not suitable, it’s time to buy a new battery for your Asus laptop. It is advisable to choose the original version for your laptop model, then you will definitely not have problems with charging. However, licensed compatible analogues will be able to please with stable operation at a lower price. It's up to you to repair or buy a new battery, but we wish your laptop many years of operation!

Our regiment received a very interesting specimen - a 1995 Micron TransPort XKE appeared in my collection, a very charismatic and interesting laptop, I must say, but it had a problem - a completely dead battery. All my attempts to “rock” it were unsuccessful, and it was decided to disassemble it and try to repair it. No sooner said than done, the battery was disassembled, and a depressing picture appeared before my eyes:

What happened next? (be careful - traffic)

The cans began to leak, voltage measurements showed that two-thirds of the cans were dead.
Along the way, I had to solve a puzzle and draw up a schematic diagram of connecting the battery cans (I’m giving a photo of a special draft that always lies under the keyboard for urgent notes):

The circuit was simplified and it became clear that the battery consists of 3 series-connected blocks of 4 elements each:

But where did ours go? My gaze fell on a battery from a ThinkPad t60 with a dead controller and quite living elements, an autopsy showed that there were the same 3 blocks of cans, but only 3 elements each, the voltage was similar, the capacity of the IBM battery was greater, well - worse will not be. The elements were disassembled and soldered again in a form that would fit into the battery case.

Attention! You need to work with jars extremely carefully so as not to cause a short circuit or overheat the jar.

Trial testing showed that the laptop starts up with this design. My joy knew no bounds, but it was here that the first trouble awaited me, the ThinkPad cans were a little thicker and longer than the original ones, so I had to rework the arrangement of elements in the case and file the body itself, and with grief, the cans fell into place:

Everything was neatly soldered, checking the battery showed that the banks were working.

But when it was decided to pack the battery back, the problem of the dimensions of the cans surfaced again - the lid was closed only under load, and therefore, for gluing with superglue, such a cocoon was made and left for several hours (I’ll probably omit the story about the hour-long dancing around the battery with a file, curse words and tape. The fact that the lid is closed is important):

Next, the seams were sanded down, and in the end I got a monolithic structure with gluing seams that were quite good for the first clump of a pancake:

The battery fell into place like a glove, the test run was successful. Practice has shown that the lifespan of a refurbished battery is about 4 hours (I’ll test it in more detail when reviewing the laptop itself next time)

By the way, you can buy new cans for your voltage, capacity, size and color. The price will still be cheaper than a new battery.

And I repeat once again - when doing this work, you must be careful and safe, and also carefully study the parameters of the cans and the connection diagram, so as not to mess up or burn the controller.

And in the end, a special thank you, thanks to whom this beast now lives with me (I don’t post a general photo on purpose, in order to leave material for a subsequent detailed and interesting review of this device).

The built-in battery allows the laptop to work autonomously for about 3-4 hours. The battery often serves properly for no more than three to four years, but sometimes problems begin much earlier. A bad battery significantly affects the performance of the laptop. The first sign of a malfunction is an alert from the operating system with a recommendation to replace the battery. The message appears when the battery capacity is already quite reduced and it cannot work fully.

"Composition" of the battery on a laptop

It’s logical to start with the “composition” of the battery on this portable device.

The battery is made up of four to eight chargeable cells placed and soldered in a case. This often leads to the false conclusion that replacing the battery on a laptop is the only way out of the situation when the device malfunctions and does not work properly; functionality can be restored in other ways.

The battery is powered by built-in batteries that are slightly larger than AA batteries, and they differ from AA batteries in capacity. Thanks to such elements, it is possible to restore the battery by replacing faulty batteries with new ones.

The main element of the battery is a microcircuit or microcontroller. This element is responsible for the operation of the battery, and also displays all the characteristics on the screen (state of charge, battery temperature, and so on).

Possible causes of malfunctions

Today's laptops use lithium-ion and nickel-metal hydride batteries. These types of batteries have replaced nickel-cadmium batteries due to their greater capacity and the absence of the so-called memory effect.
Lithium-ion batteries deteriorate quite often and relatively easily - they do not tolerate extreme heat or cold, and you also need to be careful with charging. If the battery is over-discharged, it may fail. Also, do not charge it for too long - this can also affect its performance. Another reason that can easily ruin a battery is lack of use. If the battery is in the laptop case, but the computer is running on mains power, or if the laptop has simply not been used for a long time, the battery often cannot provide the same performance.

A short circuit can even provoke an explosion. That is why a microcontroller is needed that regulates the operation of all elements and also protects against possible emergency situations.

However, if the battery holds its charge much worse, if previously you could use the computer offline for about 2 hours, but now the battery usage time barely reaches thirty minutes, and the system displays familiar messages, something should be done.

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Laptop battery repair

Calibration Repairs can be carried out by calibration, which is performed by programs from the manufacturer. The purpose of this operation is to eliminate inconsistency in the operation of the microcontroller and the battery power supply. Quite often, the battery capacity instantly drops to 30%, and this method allows you to restore functionality;
Recovery. Elements that no longer function are removed and replaced, then soldered into an electrical circuit;
It is necessary to reprogram the device with further calibration. In this way you can return the battery to service;
Replacement. If calibration and recovery do not work, then you cannot do without replacing the battery.

Algorithm for disassembling the battery on a laptop

We completely discharge the battery, and then remove it;
Open the battery cover. To do this, you need to know how to disassemble the battery on a laptop. You will need a thin knife blade and a small hammer. Lightly tap the battery case around the edges and insert the knife shallowly into the plastic cover. We do everything carefully so as not to get hurt. We carry out the operation two or three times until the body cracks, then we separate it into two parts. Take your time and remember to be careful. If you overdo it and do not calculate the force, you can damage the case and the batteries inside. Lithium batteries contain elements that are harmful to health. If you insert the blade too deep, you can easily damage the controller and other elements. In this case, there is no need to continue repairs; you can immediately save money for a new battery;
The board on the left monitors the actions of the battery, this is an important device with a microcontroller and memory elements that store information about the operation of the device, charge cycles, as well as other battery elements, they are on the right. There is no need to rush to disconnect these particles from the overall scheme. First you need to measure the voltage level on each element. On one pair the voltage, for example, can be 1.2 volts, and on the others - 3.3;
We select replacement elements and prepare them for installation. Remember the main rule: all elements must have the same capacity and type; it’s great if all the particles are from the same batch. We recommend taking several elements in reserve;

All elements must have the same resistance. They need to be installed only when discharged, approximately 3.6 V.

Products are often sold charged. Then you should use a 5-10 Ohm resistor. We discharge the elements all together, connecting them in parallel (“+” to “+”, “-” to “-”).

Let us immediately note why it is extremely undesirable to install charged elements. If you insert charged cells, the device will attempt to charge the cells. If the charge does not go (and it will not go, because there is nowhere else to go), then the system will perceive the elements as inoperative or continue charging, which can lead to quite serious consequences - failure of the laptop or even a fire.

If the preparation is complete, you can begin installing new elements;

We carry out the replacement in the following order: first we remove unnecessary elements (you need to start from the largest “+” to the smallest). New elements are placed in the reverse order - we install the element that is on the right, with “earth” first, then “+”, then we insert the following particles in turn. Next, you need to check the quality of the work performed and soldering.

Now you also need to carefully return the case to its original state, put the covers in place, then insert the battery into your laptop. Connect an external power source and charge.

Attention! Do not leave the device unattended when charging for the first time. Monitor the temperature of the charging battery to prevent overheating. If you notice any problems, immediately turn off the power and remove the battery from the computer.

After completing the charging procedure, we check the functionality of the battery. Battery life should increase significantly - by an average of an hour and a half.

If everything went well, the performance of the device is increased - congratulations on completing the work!

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Let's note a few tips for using the battery on a laptop in order to extend its performance.

If the laptop often runs on an external power source, it is better to remove the battery and store it separately in a cool place. But don’t forget to “drive” the battery. At least several times a month it is necessary to completely discharge and charge the battery. Otherwise, don’t be surprised if it refuses to work after a break in use;
The display consumes a lot of power, so if you want to increase the battery life of the laptop, reduce the brightness to optimal;
Wireless networks also have a big impact on battery life. It is advisable to turn off Wi-Fi when not in use. If possible, use wired channels;
We recommend using operating schemes for laptops to save energy. Operating systems already include designed circuits to save power. This will also help increase battery life.

What is a battery?

Before you pick up piercing and cutting objects, it is worth finding out what you will have to deal with: a rechargeable battery is a monoblock that includes several individual elements connected in series and parallel.

Over time, battery capacity decreases. This is due to the chemical reactions taking place inside the elements (cans) - that’s where life is in full swing! Even if the battery is not connected to the device, the processes do not stop.

It is for this reason that you should pay attention to the production date of the battery (just like when buying perishable products).

Although in the case of batteries, their service life is measured not in days and weeks, but in years. The battery loses up to 10% of its capacity per year. But the aging of each individual element proceeds differently. It is reasonable to assume that Operation Autopsy is carried out precisely because of these elements.

Why do elements “fly”?

This happens for several reasons:

Overheating, causing the fuse to trip;
Accelerated wear of individual elements;
Error in the controller, which “does not see” some of the cans;

It is enough to have one “black sheep” in a set of cells, and the overall efficiency of the battery drops. But what is their value if the battery is dead?

Well, to what extent he died/not died - an autopsy will show. What if he can still be brought back to life? In a word, away with all the torment and let’s get to work!

“... scalpel... scissors... swab!”

This is a joke, of course. Surgical instruments are not useful, but a mounting knife is just right. Not all batteries are collapsible; more precisely, they are mostly non-removable. Let's consider this case.

Opening

The battery monoblock housing consists of two halves, connected at the factory by hot pressing. You need to cut along the joint. For convenience, you can heat the tip of the blade and it will go like clockwork. The penetration depth should not exceed 1.5-2 mm, so as not to inadvertently damage the elements. Therefore, it is better not to rush.

A little patience, and you will be rewarded - the casket will open like an oyster shell, and “33 heroes” will appear in film, lying in strict order. In fact, there will be fewer elements - from 6 cylindrical cans.

Checking the elements

If the average temperature in the hospital is known, i.e. you know for sure that the battery is dead, now you need to find out the well-being of each patient - the performance of each battery element. For this you will need a multimeter. I won’t explain how to use it: since you have gone to great lengths, then such things should be known to you.

First, you should take measurements bypassing the controller: if the readings are equal to or exceed 3.7 times the number of cans, then the problem is with the controller. By the way, lest you forget: before opening your laptop’s battery, make sure that your power supply is in order. If anything, here's where you can find an adapter for most laptop models.

The controller is responsible for the charging and discharging process, avoiding overloads. If the elements are in order, but in general the battery “does not hold up,” then the problem is in the controller - it simply “does not see” the elements.

In this case, there is the option of reflashing the controller (if there is no mechanical damage, of course). But this will require special equipment. This operation cannot be carried out at home. But we can be glad that the banks are intact. Below I will tell you what you can do with them.

In cases where the controller is in order, by “ringing” each element separately, good jars are identified, and unusable ones are thrown away.

What if you replace all the banks and restore the battery?

A good idea is to replace the non-working banks with new ones and bring the battery back to life. But! – the indicators of the new elements must be identical. How to achieve this if the old ones have wear and tear? Only with the help of special equipment. Or replace all banks.

Replacing cans is a painstaking procedure that requires qualifications. It is not always possible to solder elements efficiently, and spot welding requires equipment. It is still possible that the controller will need to be re-flashed for new elements.

But now, as promised, I will tell you about useful little things that can be made from used cans.

Practical benefits of opening the battery

Since you have done such work, you need to get practical benefits from it. After all, you didn’t do this for the magazine “I Want to Know Everything”?

Each cell (cell) in a laptop battery is a lithium battery. Their capacity is not enough to “pull” the laptop. But each element individually, even if worn, copes well with low-power equipment. For example:

Flashlight or lamp for tourism and fishing;
Autonomous flashlight for the dacha or entrance;
Bicycle headlight.

And many, many useful “tricks”. You can even organize a competition of ideas for the use of used batteries. All that remains is to choose the jury.

Only if it is assumed that the controller board is working properly does it make sense to repair the laptop battery with your own hands. If the controller is not working properly or is already blocked, then to repair such a battery you will need to program the controller, and it is cheaper to do this in a specialized workshop since programming one battery will not recoup the cost of the programmer and program.
It is clear that you first need to remove the battery from the laptop. Next, you need to divide the plastic case into two halves and carefully remove the battery of elements with the controller board. For me, this stage was the most difficult and required non-trivial decisions. I used the following methods:

Crunch the battery - twirl it in your hands, twisting it diagonally in one direction, then in the other. This action can help the body halves come apart.
By inserting a plastic card (pick or plastic spatula) between the body halves, try to push them apart. The main thing is to find a place where you can squeeze the card into the slot, and then walk further and further around the office.
In the corners of the case, the card may not have enough rigidity and then you can use a flat-head screwdriver, the main thing is to act carefully when separating the halves, because if the screwdriver comes off, you can damage your hand, the controller board or the battery element.

As I already wrote, disassembling a laptop battery is often non-trivial and may require experience and ingenuity. For example, before I started practicing myself, I watched several videos on YouTube with disassembly of various laptop batteries. The more carefully you can disassemble the battery, the easier it will be to put it back together later.

The second step is simpler, but requires care: you need to determine the connection diagram of the battery elements and connection to the controller board. It is best to take a photo of the assembly and draw an electrical connection diagram to indicate the polarity of connecting the elements.
In the case of the Toshiba battery, the circuit for combining elements is designated as 2P3S, that is, two elements in parallel and three such blocks in series.
Next, using a voltmeter, we confirm our circuit. First you need to determine the common point, usually on the controller board it is designated as 0V or GND, relative to it we measure the remaining voltages at the connection points of the assembly to the controller board and record the readings on the diagram. At all points relative to zero, positive voltages should be obtained; if this is not the case, then most likely there was an error in choosing the common wire. And we need to find the point with the lowest potential. Next, we check the consistent voltage increase on each series-connected block of elements. This increase must be positive.

Already at this stage, based on the voltages on the elements, it is possible to make some assumptions about the state of the elements, for example, an imbalance of stresses on blocks of elements.
In the next photo you can see two thermal sensors glued with tape to the elements.

Attention!!! While the controller board is connected to the elements, the elements cannot be charged or discharged from external sources, only voltage can be measured. With your experiments with the controller, you can block it or even disable it.
Attention!!! The controller must be disconnected from the assembly of elements in a strictly defined manner, otherwise it will be blocked. The first thing you need to do is solder the wire (or bus) that has the highest voltage, that is, the positive contact of the battery cell furthest from zero. Then the wire with the maximum voltage from the remaining ones and repeat until the last wire.

Now you can put the controller and circuit away so as not to damage or lose it.
But now you can torture the battery elements in order to better understand what happened to the battery.