What are the requirements for the performance of the lithium battery protection board IC?

①The high accuracy of overcharge protection. When the lithium battery is overcharged, it is necessary to cut off the charge state in order to guard against the increase in internal pressure caused by the temperature rise. The protection IC will test the battery voltage. When the test is overcharged, it will be overcharged. The power MOSFET of the charging test is turned off to stop charging. ②Reducing the power consumption of the protection IC is to guard against over-discharge. The protection IC has to test the voltage of the lithium battery. Once it reaches the over-discharge test voltage, the power MOSFET on the discharge side must be turned off to stop the discharge. But at this time, the lithium battery itself still has natural discharge and current consumption of the protection IC, so the current consumption of the protection IC must be minimized. ③Over-current/short-circuit protection The lithium battery protection board needs to have low test voltage and high-precision requirements. When the short circuit is caused by unknown reasons, the discharge must be stopped immediately. In order to make the power effective at the charging current and the discharging current, the impedance value must be used as much as possible Low, the current impedance is about 20mQ~30mQ, so the overcurrent test voltage can be lower. ④ High voltage will appear instantaneously when the high-voltage lithium battery pack is connected to the charger, so the protection IC should meet the high-voltage requirements. ⑤Zero-volt rechargeable Some lithium batteries may have a voltage as low as 0V due to excessive storage or abnormal reasons during storage. Therefore, the protection IC can also be charged at 0V. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How to make UPS battery life longer?