The embodiment of the invention relates to the technical field of battery packs, and particularly discloses an electric connector, a
battery pack and an
energy storage system.The electric connector comprises a first connector and a second connector, the first connector comprises a first body, a first conductive base, a second conductive base and a
key switch, the first conductive base and the second conductive base are arranged on the first body, and the
key switch is used for being connected with a main
control system of the
battery pack; the second connector comprises a second body, a first conductive seat and a second conductive seat, the second conductive seat is connected with a first
electrode of the
battery pack, the first conductive seat is provided with a current conducting bar, the current conducting bar is electrically contacted with the second conductive seat to form an opening area with the second conductive seat, and the second connector comprises a second body, a first conductive head, a second conductive head, an insulating ejector rod and an insulating spacer, in the
butt joint process of the two battery packs, the insulating ejector rod of the first battery pack presses the
key switch of the second battery pack, and the insulating spacer of the first battery pack abuts against the first conductive seat and the second conductive seat of the second battery pack for breaking and isolation. According to the embodiment of the invention, contact sparking caused by connection of adjacent battery packs can be reduced.