Energy management method and device for standby power supply of hydrogen fuel cell

The invention provides a hydrogen fuel cell standby power supply energy management method and device. The hydrogen fuel cell standby power supply energy management method is used for managing a standby power supply system, the system comprises a lithium battery, a hydrogen fuel cell, an energy storage converter and an alternating current load, the alternating current load is electrically connected with the lithium battery and the hydrogen fuel cell through the energy storage converter, and the lithium battery is electrically connected with the hydrogen fuel cell. The method comprises the following steps: detecting an energy storage converter, and starting a hydrogen fuel cell when the energy storage converter meets a set condition; acquiring the required power P0 of the alternating current load; obtaining a target power value based on the required power P0 and the SOC of the lithium battery; and controlling the hydrogen fuel cell to operate based on the target power value. The purposes of avoiding frequent lo