Overview of VCU calibration and battery calibration management for pure electric vehicles

Publisher:等放假的LwjLatest update time:2023-04-25 Source: elecfans Reading articles on mobile phones Scan QR code
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The BMS determines whether it can support the next power-on (Precharge Unit Ready) based on the temperature model of the pre-charge resistor and sends it to the VCU. During normal Keyoff, the VCU enters the Change of Mind state, maintaining high voltage at this time. The high voltage power-off process is entered only when the following conditions are met


① The Precharge Unit Ready signal is set (i.e. the precharge resistor is ready for the next power-on request) and the minimum waiting time for Change of Mind is exceeded. Usually calibrated to 5-10s (avoid short-term frequent power on and off)


②Exceed the maximum waiting time for Change of Mind> Usually calibrated> 15-30s

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