Patent ID: 9742207
Date: 2017-08-22
CPC Classifications: G01R,H01L,H01M,H02J,Y02E

Claim:
1. A cell protection system comprising: a charge control MOSFET; a charge current detection MOSFET having a drain and a gate which are common with the charge control MOSFET and having a cell ratio which is different from that of the charge control MOSFET; a discharge control MOSFET having a drain common with the charge control MOSFET; a discharge current detection MOSFET having a drain and a gate which are common with the discharge control MOSFET and having a cell ratio which is different from that of the discharge control MOSFET; a charge current detection resistance provided in correspondence to the charge current detection MOSFET; a discharge current detection resistance provided in correspondence to the discharge current detection MOSFET; an charge current detection ADC (Analog/Digital Converter) provided in correspondence to the charge current detection MOSFET and connected with the charge current detection resistance; a discharge current detection ADC provided in correspondence to the discharge current detection MOSFET and connected with the discharge current detection resistance; and a control circuit configured to generate a control signal which is supplied to gates of the charge control MOSFET and the charge current detection MOSFET according to a voltage value of the charge current detection ADC, and to generate a control signal which is supplied to gates of the discharge control MOSFET and the discharge current detection MOSFET according to a voltage value of the discharge current detection ADC.