| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a detector for detecting the voltage of a battery module in an electric automobile utilizing a differential amplifying circuit. SOLUTION: In order to obtain the voltage of a battery module in an electric automobile utilizing a differential amplifying circuit, an effective gain of the differential amplifying circuit is measured at first, an output voltage from the differential amplifying circuit obtained by applying the voltage across the battery module is then measured, and then they are multiplied. The detector comprises an auxiliary power supply outputting a reference voltage, a first switching circuit for applying the voltage across the battery module to the input terminal, a second switching circuit for applying the reference voltage to the input terminal, and a controller for calculating the voltage of the module based on the output voltage. COPYRIGHT: (C)2004,JPO&NCIPI |
