METHOD AND DEVICE FOR DETECTING STATE OF OVERCURRENT PROTECTOR FOR BATTERY

摘要

A method and a device for detecting the state of an overcurrent protector for a battery are disclosed, the method including: acquiring a voltage of a supply power source U out and a voltage U bat of the battery connected to the supply power source via the overcurrent protector and calculating U=|U out- U bat|; adjusting the voltage of the supply power source to U' out, when U L =U=U H and |I bat|=I min, wherein U L and U H are respectively the minimal and maximum differences between the voltage of the supply power source and the voltage of the battery, I bat is the current value of the battery, and I min is the precision value of the current detection of the device for detecting the battery current; acquiring the voltage of the battery U'bat after the adjustment of the voltage of the supply power source and calculating U', wherein U'=|U' out- U' bat|; and judging the state of the overcurrent protector for the battery. The present invention adjusts the supply voltage under the condition that the difference value between the voltage of the battery and the supply voltage is relatively small and compares the voltage difference between the two ends of the overcurrent protector again, which can accurately detect the state of the overcurrent protector for the battery and can reduce the detection cost.