Method and device for double-precision SOC (state of charge) test of electric vehicle power battery
A technology for power batteries and electric vehicles, applied in measurement devices, measuring electricity, measuring electrical variables, etc., can solve the problems of inaccurate sampling, too wide measurement range, and wide variation range of power batteries, so as to achieve accurate sampling and solve the variation range. wide-ranging problems, solving effects that are susceptible to interference
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[0020] In order to describe the technical content, structural features, achieved objects and effects of the present invention in detail, the following detailed description is given in conjunction with the embodiments and the accompanying drawings.
[0021] The invention relates to a double-precision SOC testing method for an electric vehicle power battery. Two current Hall devices with different transformation ratios are connected in series and then connected in series with a power battery module and a comprehensive load module to form a test loop; The output signal is output in voltage or current mode, and the output signal is transmitted to the battery management after information processing.
[0022] Further, the signal processing is usually completed by an MCU, the battery management and the MCU communicate with each other through the CAN bus, and the current Hall device is controlled after information processing.
[0023] Generally, when two current Hall devices with diff...
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