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 (R1); detecting a voltage at a second detection point, wherein the second detection point is suspended or connected to ground through at least one resistor, the second detection point is short-circuited with the first detection point through the load interface 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 that is configured to charge and discharge the battery group , to enter a pre-charging mode, and pre-charging a load capacitor (C1) 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; wherein the switch circuit comprises a first switch, a second switch, and a third switch, the first switch is connected in parallel with the second switch; the first switch is connected in series with the third switch; and the second switch is connected in series with the third switch through at least one resistor; under the voltage difference between the voltage at the first detection point and the voltage at the second detection point is greater than the preset voltage threshold condition, controlling the first switch, the second switch, and the third switch in the switch circuit to maintain turned off. 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 (R1); detecting a voltage at a second detection point, wherein the second detection point is suspended or connected to ground through at least one resistor, the second detection point is short-circuited with the first detection point through the load interface 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 that is configured to charge and discharge the battery group , to enter a pre-charging mode, and pre-charging a load capacitor (C1) 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; wherein the switch circuit comprises a first switch, a second switch, and a third switch, the first switch is connected in parallel with the second switch; the first switch is connected in series with the third switch; and the second switch is connected in series with the third switch through at least one resistor; under the voltage difference between the voltage at the first detection point and the voltage at the second detection point is greater than the preset voltage threshold condition, controlling the first switch, the second switch, and the third switch in the switch circuit to maintain turned off. <EOS>