Internal Short Circuit Causes in Lead-Acid Batteries
Lead-acid battery short-circuit phenomena are mainly manifested in the following aspects:
1) Low open-circuit voltage; the closed-circuit voltage (discharge) quickly reaches the termination voltage.
When a high current discharge occurs, the terminal voltage drops rapidly to zero.
3) During the initial stage, the electrolyte density is very low, and in low-temperature environments, the electrolyte may freeze.
4) During charging, the voltage rises slowly and remains at a low level (occasionally dropping to zero).
5) The electrolyte temperature rises very high and quickly during charging.
6) During charging, the electrolyte density rises slowly or shows almost no change.
7) No bubbling or late bubbling during charging.
The primary causes of internal short-circuiting in lead-acid batteries include:
1) Poor quality or damaged separators allow active substances to pass through, resulting in virtual contact or direct contact between the positive and negative plates.
2) Partition misalignment resulted in the connection between the positive and negative plates.
3) The expansion and detachment of active substances on the board have caused the active substances to accumulate excessively. This has led to the positive and negative plates' lower edges or side edges contacting the deposits, resulting in the connection of the positive and negative plates.
4) Conductive objects falling into the battery cause the positive and negative plates to connect.
5) Inadequate removal of the "lead flow" during welding clusters, or the presence of "lead beans" between the positive and negative plates during assembly, can damage the separator during charging and discharging, causing the positive and negative plates to connect.
Above is the introduction to the causes of internal short-circuit in lead-acid batteries. If you have any further questions, feel free to consult our website, where we have professionals ready to explain.
