Introduce the self-protection function of lithium-ion battery

When the charger overcharges the lithium-ion battery, it is necessary to terminate the charging state in order to prevent the internal pressure from rising due to temperature rise. For this reason, the protection device needs to monitor the battery voltage, and when it reaches the battery overcharge voltage, it activates the overcharge protection function and stops charging. 2. Over-discharge protection In order to prevent the over-discharge of the lithium-ion battery, when the voltage of the lithium-ion battery is lower than its over-discharge voltage detection point, the over-discharge protection is activated, the discharge is stopped, and the battery is kept in a low quiescent current standby mode . 3. Over current and short circuit protection When the discharge current of the lithium ion battery is too large or a short circuit occurs, the protection device will activate the over current protection function. 4. Protection of multi-cell lithium circuit. The rated voltage of single lithium-ion battery is 3.6V, which cannot meet the requirements of high-voltage power supply occasions. Therefore, it is necessary to use multiple lithium-ion batteries in series. To this end, all relevant power management control integrated circuit manufacturers have launched their own multi-cell lithium-ion battery (lithium-ion battery pack) protection integrated circuit chips. This type of product is characterized by monitoring the charge and discharge of 3 or 4 lithium-ion batteries. Status, can realize overcharge, overdischarge and overcurrent protection. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: The basic structure of the battery and the key process of assembly