Cell manufacturers want to squeeze margins in terms of cell efficiency and cost. Battery cells will short-circuit more often, because ‣. Therefore, BMS must be tested for handling of such events.

Automatic battery problem discovery can find safety problems.

Part of ‣ and System needs for a vehicle battery.

Concretely:

• Estimate the risk of cell failure
• Primary risk of overcharge of a cell is catching fire
• Cycled cells can catch fire more easily than new cells
• Cell voltage dips upon a soft short
• Alert on unusually high self-discharge rate or unusually low Coulombic efficiency of cellgroups
• ‣
• Onset of self-heating of cells

See also:

• ‣
• Cell degradation
• Efficiency—performance—safety tradeoffs in batteries