Battery pack

A battery pack comprising a battery cell, an input/output terminal to/from which a charging/discharging current of the battery cell is to be inputted/outputted, and a connector detachably connected to the input/output terminal, wherein

• the input/output terminal comprises a first hollow conductive member protruding in a first direction and a second hollow conductive member protruding to surround an outer periphery of the first hollow conductive member,
• the connector comprises a central guide protruding in a second direction opposite to the first direction, and a third hollow conductive member protruding to surround an outer periphery of the central guide,
• the central guide is fitted into a hollow portion of the first hollow conductive member,
• the third hollow conductive member is fitted into a space between the first and second hollow conductive members and is electrically connected to the first and second hollow conductive members by an elastic connection member arranged in the space, and
• the elastic connection member comprises a disk member and an inner ring elastic piece and an outer ring elastic piece protruding from an inner ring and an outer ring of the disk member, respectively, in the first direction.

A battery pack comprising a battery cell, an input/output terminal to/from which a charging/discharging current of the battery cell is to be inputted/outputted, and a connector detachably connected to the input/output terminal, wherein

• the input/output terminal comprises a first hollow conductive member protruding in a first direction and a second hollow conductive member protruding to surround an outer periphery of the first hollow conductive member,
• the connector comprises a central guide protruding in a second direction opposite to the first direction, and a third hollow conductive member protruding to surround an outer periphery of the central guide,
• the central guide is fitted into a hollow portion of the first hollow conductive member,
• the third hollow conductive member is fitted into a space between the first and second hollow conductive members and is electrically connected to the first and second hollow conductive members by an elastic connection member arranged in the space,
• the input/output terminal further comprises an insulating housing that surrounds an outer periphery of the second hollow conductive member and has a coupling portion for sliding coupling with the connector thereon,
• the connector further comprises an insulating cap that surrounds an outer periphery of the third hollow conductive member and comprises a lever member for detachable coupling with the input/output terminal, and
• the lever member comprises a pair of lever members at facing positions in a circumferential direction of the insulating cap and corresponding to the coupling portion of the insulating housing.