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What is the internal pressure of a battery?

Views: 0     Author: Site Editor     Publish Time: 2023-08-02      Origin: Site

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Refers to the internal pressure of a battery, which is caused by the gas generated during the charging and discharging process of the sealed battery. It is mainly affected by the battery material, manufacturing process, and battery


Structural and other factors have an impact. The main reason for its occurrence is due to the accumulation of water and gas generated by the decomposition of organic solutions inside the battery


To. Generally, the internal pressure of the battery is maintained at a normal level. In the case of overcharging or discharging, the internal pressure of the battery may increase:


For example, overcharging, positive electrode: 4OH -4e → 2H2O+O2 ↑; ①


The generated oxygen reacts with the hydrogen gas precipitated on the negative electrode to generate water 2H2+O2 → 2H2O ②


If the speed of reaction ② is lower than that of reaction ①, the generated oxygen will not be consumed in time, which will cause an increase in the internal pressure of the battery.


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