Direct-current support capacitor shell explosion-proof test device and method

The invention provides a direct-current support capacitor shell explosion-proof test device and method. The device comprises a direct-current power supply, an electronic device, a charging switch, a discharging switch, a capacitor, a current measuring instrument, a voltage measuring instrument and an energy release unit, the anode of the direct-current power supply is electrically connected with the anode of the capacitor sequentially through the electronic device and the charging switch; the cathode of the capacitor is electrically connected with the cathode of the direct-current power supply; the discharge switch, the to-be-tested DC support capacitor and the current measuring instrument are sequentially connected in series to form a discharge bypass, and the discharge bypass is connected in parallel with the capacitor; the voltage measuring instrument is connected in parallel with two ends of the to-be-tested DC support capacitor. One end of the energy release unit is electrically connected with the positi