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Why is the mobile battery swell? – Mobile battery wholesale

227 views Yuda Electronic (HK) Technology Co.,Limited. 2018-12-21

At present, the batteries used in mobile phones on the market are mainly lithium-ion batteries and lithium-ion polymer batteries, and polymer batteries have become the main force because of the characteristics and energy advantages of the products. Before introducing the problems, let’s understand the difference between the two types of batteries. The positive and negative materials used in the polymer lithium ion battery are the same as the liquid lithium ions. The positive electrode material is divided into lithium cobaltate, lithium manganate, ternary material and lithium iron phosphate material, and the negative electrode is graphite. The working principle of the battery is also basically Consistent. The main difference between them is the difference in electrolytes. Liquid lithium-ion batteries use liquid electrolytes, and polymer lithium-ion batteries are solid polymer electrolytes.


The chemical nature of lithium is very active and easy to burn. When the mobile battery is charged and discharged, the internal temperature of the mobile battery continues to heat up, the generated gas expands, the internal pressure of the battery increases, and the pressure reaches a certain level. If the outer casing is broken, it will cause expansion and fire. Even the explosion. The polymer lithium ion battery is safer because it uses a solid electrolyte, does not leak and explode, and only expands. Therefore, mobile battery wholesalers now basically produce polymer lithium batteries.


Compared with the two batteries, the polymer lithium battery is higher in safety than the lithium ion battery, and the cost is also higher, but there is still a problem of expansion, this is closely related to product quality and user habits.

Why is the mobile battery swell

The expansion of the polymer battery is caused by damage to the internal diaphragm, and gas is generated inside the mobile battery. Under normal circumstances, if there is no problem with the manufacturing process of the mobile battery wholesale manufacturer, the mobile battery will not easily expand. Of course, there are still many new chip manufacturers, because the production process or process is not mature enough, resulting in poor sealing or poor bonding during the manufacturing process. Such batteries are placed for a while even if you don’t use them. It will also swell or leak afterwards.


After using the mobile battery for a period of time, it will produce certain changes compared with the new one. What we need to do is to ensure the work efficiency and safety as much as possible, avoid using non-original batteries, and try to choose the original phone charger


Yuda Electronics Co., Ltd. is an original phone accessories distributor with 15 years experience, including original Apple/Samsung car charger, phone charger and other phone accessories, contact us for a free quote.

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