CPC H02J 7/0047 (2013.01) [B60L 3/0046 (2013.01); B60L 3/12 (2013.01); B60L 58/12 (2019.02); G01R 31/3835 (2019.01); H02J 7/007182 (2020.01); H02J 7/345 (2013.01)] | 20 Claims |
1. A load access detection method, comprising:
detecting a voltage at a first detection point, wherein the first detection point is electrically connected to a positive electrode of a battery group in a battery pack through a bridging resistor;
detecting a voltage at a second detection point, wherein the second detection point is short-circuited with the first detection point when the battery pack is connected to a load circuit; and
under a voltage difference between the voltage at the first detection point and the voltage at the second detection point being less than or equal to a preset voltage threshold condition, controlling a switch circuit to enter a pre-charging mode, and pre-charging a load capacitor in the load circuit through the battery pack, wherein a charging current of the switch circuit in the pre-charging mode is less than a charging current of the switch circuit in a charging mode.
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