Bending and Corrosion Fracture of Saint-Yang Battery Plate

The bending of the plate of Shengyang batteries occurs mostly in the positive plate, while the negative plate seldom occurs. Some of the bending of the negative plate is caused by the bending of the positive plate, which forces the negative plate to bend.

The fracture of the plate often occurs during the service life. Because of the corrosion of the grid, the strength of the plate decreases, resulting in the fracture of the plate, especially the performance of the positive grid is more serious. The main reasons for the bending of the plate are as follows:

A. During the manufacturing process, the active substances on the plates are not uniform in formation or paste distribution. Therefore, the electrochemical effect of each part of the plates during charging and discharging is not uniform, which causes the volume expansion and contraction of the active substances on the plates to be inconsistent and causes bending and cracking.

B. Overcharging or over discharging increases the expansion and contraction of the inner active material, and the recovery process is inconsistent, resulting in the bending of the plate.

C. When discharging at high current or high temperature, the reactions of active substances on the plates are more intense, which may lead to uneven chemical reactions and lead to plate bending.

D. There are impurities in Shengyang batteries. Only a small part of active substances change into lead sulfate when they cause local effects, resulting in inconsistent volume changes of active substances in the whole plate, resulting in bending.