Patent ID: 8890482
Filing Date: 2014-11-18
Classification: H01M,H02J,Y02E

Abstract:
1. A protection monitoring circuit comprising: a protection circuit which detects at least one of overcharge, overdischarge, and overcurrent of a chargeable and dischargeable secondary battery and protects the secondary battery by performing an ON/OFF control of transistors; and a secondary battery monitoring circuit which detects states including a remaining battery level of the secondary battery, said secondary battery monitoring circuit being separate from the protection circuit, wherein the protection circuit is configured to supply a power supply voltage to the secondary battery monitoring circuit, and further configured to inhibit, if overdischarge of the secondary battery is detected, the supply of the power supply voltage to the secondary battery monitoring circuit after a predetermined time has elapsed or after a control signal for inhibiting the supply of the power supply voltage is received from the secondary battery monitoring circuit, and wherein the protection circuit outputs a notification signal indicating that overdischarge of the secondary battery is detected, to the secondary battery monitoring circuit if the overdischarge of the secondary battery is detected, and wherein the protection circuit includes a voltage regulator that supplies the power supply voltage to the secondary battery monitoring circuit.