Patent ID: 9086461
Filing Date: 2015-07-21
Classification: G01R

Abstract:
1. A circuit for measuring voltage of a battery, comprising: a switching element connected to the battery and outputting a first signal at a first voltage level, the switching element being configured to be turned on or turned off based on a voltage measurement control signal; a voltage conversion circuit connected to the switching element and configured to receive the first signal from the switching element and output a second signal at a second voltage level proportional to the first voltage level; an analog-digital converter configured to receive the second signal and convert the received second signal into a digital signal; and a controller configured to transfer the voltage measurement control signal to the switching element, and to receive the digital signal from the analog-digital converter; wherein the switching element is configured to transfer the first signal to the voltage conversion circuit and isolate the controller from the first signal when the switching element is turned on, and wherein the switching element does not transfer the first signal to the voltage conversion circuit when the switching element is turned off.