BQ40Z80 BMS problems
1. Product use environment
The chip is used in 4S/8Ah, 5S/10Ah lithium-ion battery pack.
The battery pack supplies power to an active speaker.
2. Battery problems in use
Battery pack BMS configuration is according to the official information configuration, batch battery learning adopts Golden Pack mode.
Independent tests of battery pack protection functions and indicators are OK.
However, when used with the equipment, the battery battery discharge MOS tube will break along with the shutdown, and it will automatically recover after being turned off for about 20ms.
Frequency: 10 devices, complete charging and discharging once for a cycle (about 20 hours), every 2-3 cycles
The probability of occurrence is 1-2 times.The failure equipment is random and the time is random.
At present, it is very difficult to locate the fault. Using EV2300 to track a device, it usually takes 2-3 days to track the tracked device without any problems.
Other devices can have random problems.
