Overcharge test
Fully charge the lithium iron phosphate battery with 1C, and conduct an overcharge test according to 3C overcharge 10V. When the battery is overcharged, the voltage rises to a certain voltage and stabilizes for a period of time. When the battery voltage is close to a certain time, the battery voltage rises rapidly, and when it rises to a certain limit , The battery top hat is pulled off, the voltage drops to 0V, and the lithium battery does not catch fire or explode.