BMS failure analysis method of lithium iron phosphate battery pack
September 9, 2021
BMS failure analysis method of lithium iron phosphate battery pack
When a communication interruption or abnormal control occurs in the system, observe whether each module of the system has an alarm and whether there is an alarm icon on the display screen, and then investigate the phenomenon one by one.
●Failure Reproduction Method
The failures of bMS vehicles with lithium iron phosphate battery packs are different under different conditions. If conditions permit, the failure should be reproduced under the same conditions as much as possible to confirm the problem.
●Exclusion method
When a similar interference phenomenon occurs in the system, each component in the system should be removed one by one to determine which part has an impact on the system.
●Replacement method
When a certain module has abnormalities in temperature, voltage, control, etc., change the position of the module with the same number of strings to diagnose the module problem or the wiring harness problem.
●Environmental Inspection Law
When the system fails, such as the system cannot be displayed, we should not rush to carry out in-depth consideration, because often we will ignore some details. First of all, we should look at the obvious things: if it is plugged in? Is the switch turned on? Are all the wires connected? Perhaps the root of the problem lies in it.
●Program upgrade method
When an unknown fault occurs after the new program is burned, causing system control abnormality, the previous version of the program can be burned for comparison to resolve the fault.