Washer for an electrical energy store, electrical energy store, arrangement and motor vehicle

An electrical energy store for a motor vehicle, comprising:

• at least one energy storage module;
• a housing for receiving the at least one energy storage module;
• at least one connector for providing a mechanical connection between metallic contact surfaces of the at least one energy storage module and of the housing;
• and
• at least one washer arranged between the energy storage module and the housing, the washer comprising:
• a metallic bushing for providing a current path between axially opposite abutment surfaces of the metallic bushing for pressing against the metallic contact surfaces of the energy storage module and the housing for potential equalization between the energy storage module and the housing, wherein
• metallic axially opposite end faces of said metallic bushing form the axially opposite abutment surfaces,
• the metallic bushing has, between the axially opposite end faces, a cross-sectional tapering, which tapering forms a fuse for interrupting a current path in an event of an overcurrent, and
• the metallic bushing has an axial hole for receiving the at least one connector of the mechanical connection;
• and
• a thermally insulating material surrounding the metallic bushing at least in a region of the cross-sectional tapering, wherein
• the thermally insulating material compensates for the cross-sectional tapering to provide a substantially constant outer diameter of the washer and to reduce a thermal conductivity of a heat-conducting path, formed via the washer, between the housing and the energy storage module.

An arrangement for a motor vehicle, comprising:

• a heat source of the motor vehicle;
• an electrical energy store, the electrical energy store comprising:
• at least one energy storage module;
• a housing for receiving the at least one energy storage module, wherein the heat source is configured to introduce heat into the housing;
• at least one connector for providing a mechanical connection between metallic contact surfaces of the at least one energy storage module and of the housing;
• and
• at least one washer arranged between the energy storage module and the housing, the washer comprising:
• a metallic bushing for providing a current path between axially opposite abutment surfaces of the metallic bushing for pressing against the metallic contact surfaces of the energy storage module and the housing for potential equalization between the energy storage module and the housing, wherein
• metallic axially opposite end faces of said metallic bushing form the axially opposite abutment surfaces,
• the metallic bushing has, between the axially opposite end faces, a cross-sectional tapering, which tapering forms a fuse for interrupting a current path in an event of an overcurrent, and
• the metallic bushing has an axial hole for receiving the at least one connector of the mechanical connection;
• and
• a thermally insulating material surrounding the metallic bushing at least in a region of the cross-sectional tapering, wherein
• the thermally insulating material compensates for the cross-sectional tapering to provide a substantially constant outer diameter of the washer and to reduce a thermal conductivity of a heat-conducting path, formed via the washer, between the housing and the energy storage module.