Lithium Battery Charging

The rated voltage of lithium-ion batteries caused by overcharge and overdischarge is 3.7V because of material changes in recent years, and 3.2V for lithium iron phosphate (hereinafter referred to as ferrophosphorus) cathode. When charged, the terminal charging voltage is generally 4.2V and 3.65V for ferrophosphorus. The termination discharge voltage of lithium ion battery is 2.75V~3.0V (the battery factory gives the range of working voltage or termination discharge voltage, with slightly different parameters, generally 3.0V and 2.5V of ferrophosphorus). Continuous discharge below 2.5V (ferrophosphorus 2.0V) is called over-discharge. Low-voltage over-discharge or self-discharge reaction will lead to the decomposition and destruction of lithium-ion active substances, and may not necessarily be reduced. The performance of lithium-ion batteries will be seriously damaged or even exploded by any form of overcharge. Lithium-ion batteries must avoid overcharging during charging.