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During the use of polymer lithium batteries, due to excessive charging current, overcharge and other reasons, the battery bulges. There are also low-cost bulged (peeled) polymer lithium batteries for sale on the shopping website. For such polymer lithium batteries with internal gas, if they continue to be used, they will not only generate heat, bulge, cause safety hazards, but also accelerate battery damage. Therefore, the internal gas must be removed before they can continue to be used, Next, we will introduce a simple method to remove the gas inside the polymer lithium battery.

1、 Preparation:

Find a ventilated place, and prepare polymer batteries, scissors, ticket holders, toothpicks, 705 transparent silicone rubber, transparent tape, syringes, and infusion needles with a section of plastic tube to be processed (must be the smallest);

2、 Preparation for air extraction:

Connect the syringe with the infusion needle, insert the hand-held needle at a suitable position at the lithium battery seal, and then fix the needle with adhesive tape to keep it from moving. Use a toothpick to take a small amount of 705 silicone rubber and apply it near the needle to prevent air leakage.

3、 Extraction gas:

Pull the syringe to extract the gas from the battery. After a full tube is drawn, clamp the plastic tube of the needle with a bill clip, separate the syringe from the needle, and discharge the gas (although the gas in the battery is non-toxic, it smells bad, so find a ventilated place). Then connect the syringe with the needle and repeat the operation.

4、 Sealing:

After many operations, the aluminum film of the battery will gradually tighten and close to the battery body, and the battery will become very hard. After the gas cannot be extracted and the inside of the battery is close to the vacuum state, clamp the plastic tube behind the needle head with a clip, cut a small piece of (1cm square) transparent tape with scissors, stick it to the needle hole, press the needle tightly (like our usual infusion needle), and the operation is completed.

5、 Quality inspection:

Because the pinhole is very small and sealed with silicone rubber and transparent tape, the gas will not enter the battery again. After a few hours of curing of silicone rubber, test the battery. First, fully charge and discharge the battery with a small current for several times. If there is no problem of bubbling, the treatment is completed. If there is still gas generated, it can be operated again according to the above process. If it still cannot be solved, it means that the battery has been scrapped. I bought more than ten gas-filled polymer lithium batteries at a low price on the shopping website. After the above treatment, they have all returned to normal use with good results.

It depends on the material. If it is lithium iron phosphate, the voltage should be normal. If it is ternary material, it means that the battery may not be normal. It is estimated that it cannot be used.

There are many kinds of lithium batteries according to the cathode materials: ternary lithium batteries, lithium cobaltate, lithium manganate, lithium iron phosphate, etc.

1. In addition to the low voltage of lithium iron phosphate, the voltage is generally between 2.4-3.8V, and the discharge platform is 3.2V;

2. The working voltage of other batteries is generally 3-4.2V, and the discharge platform is 3.6V or 3.7V.

Therefore, if it is a lithium iron phosphate battery cell, it means that the battery cell has no problem. It just has no power. If it is a battery cell, it may be damaged. It is necessary to test whether the battery can still be used.

In addition, polymer batteries are classified according to electrolyte

Polymer batteries can be repaired. The method is as follows:

Remove the protective plate and measure it. The output voltage of the battery has changed. Replace the battery with a new one and stick it with adhesive tape after welding. Use the power supply to start charging with small current, slowly increase the voltage, and keep the current no more than 500Ma. Fully charge the battery. Finally, use the mobile phone to vibrate and discharge.

Polymer battery is a kind of lithium-ion battery, but compared with liquid lithium battery (Li-ion), it has many obvious advantages, such as high energy density, miniaturization, ultra-thin, lightweight, and high safety. It is a new type of battery. In terms of shape, lithium polymer battery has ultra-thin characteristics, which can be made into any shape and capacity battery according to the needs of various products. The minimum thickness that this kind of battery can reach is 0.5mm. Its nominal voltage is the same as Li-ion's nominal voltage of 3.7V, without memory effect.

It is divided into two parts. If the protection board component is damaged, compare MOS and IC are burnt out, it can be replaced or repaired, not to mention poor welding. If the battery core is damaged, it will be more troublesome. You can also replace it if you want to find a suitable battery core. However, if it is a laptop or tablet computer, it is not easy to replace the cell itself. After replacing the cell, a capacity learning step needs to be completed by a special person.

Battery repair refers to the repair of rechargeable batteries with degraded performance or failure by physical or chemical means. The capacity of the battery can be restored through repair, the service life of the battery can be extended, and the performance of the battery can be improved.

Battery, also known as chemical power supply, is a device that can provide DC power for electrical appliances. Chemical power supply converts chemical energy into electrical energy through the electrochemical reaction of oxidation and reduction. The primary battery is a disposable battery, and the secondary battery is a battery that can be used repeatedly for many times, so the secondary battery here actually means multiple times. Secondary battery is also called rechargeable battery or battery.

Battery repair refers to the maintenance of batteries with degraded performance or failure by physical or chemical means.

Secondary battery, also known as "rechargeable battery", refers to the battery that can be activated by charging to continue to use after the battery is discharged. The main rechargeable batteries on the market include "nickel hydrogen", "nickel cadmium", "lead acid (lead battery)", "lithium ion (including lithium battery and lithium ion polymer battery)", etc. There are many methods to repair lead-acid batteries, such as "hydrotherapy", "shallow circulation high current charging method", "nano carbon sol battery activator repair", "pulse battery repair instrument repair", "battery repair fluid repair", etc.

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