Method and device for detecting state of overcurrent protector for battery

摘要

The disclosure discloses a method and device for detecting a state of an overcurrent protector for a battery, wherein a voltage Uout of a power supply and a voltage Ubat of a battery connected to the power supply via an overcurrent protector is acquired, and U=|Uout−Ubat| is calculated; when UL≦U≦UH and |Ibat|≦Imin, the voltage of the power supply is adjusted to be U′out, wherein UL and UH are the minimum value and maximum value of a difference between the voltage of the power supply and the voltage of the battery, respectively, Ibat is a current of the battery, and Imin is a current detecting precision for detecting a current equipment of the battery; the voltage of the battery U′bat after adjusting the voltage of the power supply is acquired, and U′=|U′out−U′bat| is calculated; and a state of the overcurrent protector for the battery is determined. With the disclosure, in the case that the difference between the voltage of the battery and the supply voltage is small, by regulating the supply voltage and comparing the voltage difference across the overcurrent protector again, accurate detection of the state of the overcurrent protector for the battery as well as reduction of detecting costs is enabled.

主权项

1. A method for detecting a state of an overcurrent protector for a battery, comprising:
acquiring a voltage Uout out of a power supply and a voltage Ubat of a battery connected to the power supply via an overcurrent protector, and calculating U, wherein U=|Uout−Ubat|; when UL≦U≦UH and |Ibat|≦Imin and adjusting the voltage of the power supply to be U′out, wherein UL is a minimum value of a difference between the voltage of the power supply and the voltage of the battery, UH is a maximum value of the difference between the voltage of the power supply and the voltage of the battery, Ibat is a current of the battery, and Imin is a current detecting precision of an equipment for detecting the current of the battery; acquiring the voltage of the battery U′bat after adjusting the voltage of the power supply, and calculating U′, wherein U′=|U′out−U′bat|; and determining a state of the overcurrent protector for the battery.