Electric vehicle battery common failure reason and solution

　　A, lead-acid battery short circuit

　　Lead-acid battery internal short circuit is refers to the battery positive and negative plate group is connected.

　　Lead-acid battery short circuit is mainly manifested in the following respects.

　　(1) low open circuit voltage, closed circuit voltage (discharge) to end soon.

　　(2) the high discharge current, voltage drops rapidly to 0 v.

　　(3), when open the electrolyte density is very low, the electrolyte will be frozen in the cold environment.

　　(4) when charging, the voltage rise slowly, always keep low (sometimes reduced to 0).

　　(5) when charging, the electrolyte temperature rises high, fast.

　　6. When charging, the electrolyte density rises slowly or almost no change.

　　All landowners bubbled or bubbles appear when charging very late.

　　The cause of lead-acid battery internal short circuit has the following several aspects.

　　(1) plate quality is bad or defect, make the plate through the active material and the positive and negative plate contact or direct contact.

　　(2) the partition into a connected to the positive and negative plates.

　　(3) on the plate of the active material expansion, due to the loss of the active material deposition is overmuch, cause positive and negative plate bottom edge or side edge connected with sediments caused by mutual contact the positive and negative plates.

　　(4) conducting objects fall into caused inside the battery positive and negative plate is connected.

　　(5) when the welding plate group formation of sulfur "lead" in addition to, or a "lead" assembly exists between the positive and negative plate, damage in the process of charging and discharging clapboard, causing the positive and negative plate is connected.