Charging high-voltage absorption circuit suitable for lithium battery protection system

The invention relates to the technical field of lithium battery charging, and discloses a charging high-voltage absorption circuit suitable for a lithium battery protection system, which comprises a high-voltage absorption circuit, a lithium battery charging and discharging circuit and a sampling control circuit, and is characterized in that the high-voltage absorption circuit is used for providing a discharging loop for a charger before a charging loop of the battery protection system is cut off; and the lithium battery charging and discharging circuit is used for controlling a charging loop and a discharging loop of the lithium battery. According to the charging high-voltage absorption circuit suitable for the lithium battery protection system, abnormal conditions such as over-high voltage, over-high current, over-high battery temperature and over-low battery temperature of a lithium battery are collected in real time, the charging high-voltage absorption circuit is automatically started or turned off, and