Method and system for detecting battery state based on capacitive transducer

The invention discloses a method and a system for detecting a battery state based on a capacitive transducer. The method includes the following steps: a capacitive transducer acquiring required capacitance value data; based on the acquired capacitance value data, conducting the detection on the battery state, wherein the detection includes but is not limited to analysis on whether the battery is positioned inside the capacitive transducer; based on changing data of the capacitance value in the discharging process of the battery, obtaining residual electricity of the battery and residual energy; based on the changing data of the capacitance value brought by volume differences of the battery at different temperatures, analyzing the temperature of the interior region of the battery; based on the changing data of the capacitance value brought by material and volume differences of the battery under different aging levels, conducting online analysis on the aging level of the battery and conducting rapid evaluation on battery consistency based on performances of the capacitive transducer of different batteries. According to the invention, the method has strong robustness, can conduct online analysis on the aging level of the battery, is reliable and comprehensive, can conduct rapid detection on the consistency, and can be widely applied to the field of batteries.