Excessive charging refers to the behavior that the battery is fully charged after a certain charging process.

Due to the design, the negative pole capacity is higher than the positive pole capacity. Therefore, the gas generated by the positive electrode is compounded by cadmium and the negative electrode through the diaphragm paper. Therefore, in general, the internal voltage of the battery will not significantly increase, but if the charging current is too large or the charging time is too long, the oxygen generated is too late to be consumed, which may cause the internal voltage to increase, the battery deformation, leakage liquid, and leakage. Wait for bad phenomena. At the same time, its electrical properties will also be significantly reduced.

After the battery is installed in the internal storage power, after the voltage reaches a certain value, it will cause discharge to continue to discharge. Generally, the discharge deck voltage is determined according to the discharge current. 0.2c-2C discharge generally sets 1.0V/branch, and 3C or more such as 5C or 10C discharge is set to 0.8V/branch. Repeatedly impact on the battery. Generally speaking, over -discharge will increase the internal voltage of the battery, and the reversibility of positive and negative active substances will be damaged. Even if charging can only be partially recovered, the capacity will be significantly attenuated.

What is the problem with the combination of batteries of different capacity?

If you use different capacity or old batteries together, there may be phenomena such as leakage, zero voltage. This is because during the charging process, some batteries are over -charged during charging, some batteries are not fully charged, and batteries with high capacity when discharge have not been charged, and those with low capacity are overwhelmed. With such a malignant cycle, the battery is damaged and leaks or low (zero) voltage.