POWER-ON METHOD FOR BATTERY SYSTEM, BATTERY SYSTEM, AND ELECTRIC APPARATUS

A battery system includes a plurality of battery swapping units connected in parallel, where each battery swapping unit includes a battery and a first battery management unit of the battery, and the battery system further includes a second battery management unit connected to the first battery management units in the plurality of battery swapping units. The power-on method is performed by the second battery management unit, and the power-on method includes: receiving a first power-on signal sent by a vehicle control unit; and in response to the first power-on signal, sending a second power-on signal to the first battery management unit, where the second power-on signal is used to instruct the first battery management unit to control a corresponding battery swapping unit to perform high-voltage power-on.