Patent ID: 7385794
Filing Date: 2008-06-10
Classification: G06F,H02J

Abstract:
1. A secondary battery protection device, comprising: a voltage detection device that detects an overvoltage of a power supply circuit including a secondary battery; a current detection device that detects an overcurrent of the power supply circuit; a protection circuit that shuts off the power supply circuit based on a signal representing a detection made by at least one of the voltage detection device and the current detection device of an excess current that is generated in the power supply circuit; and a latch that holds a battery status representing the overcurrent detected by the current detection device or the overvoltage detected by the voltage detection device; if the battery status representing at least one of the overcurrent and the overvoltage is set, a signal corresponding to the battery status is output in a system bus and the battery status is notified to a microcomputer.