Cable, battery and electricity consuming device
A cable for a battery includes a conductive member that extends in a longitudinal direction of the cable, an expansion member spaced with the conductive member, and an insulation member covering the periphery of the conductive member and the expansion member. The insulation member has a through hole. The expansion member is configured to expand and overflow to the outer surface of the insulation member through the through hole when the temperature reaches a threshold.
1. A cable for a battery, comprising:
a conductive member extending in a longitudinal direction of the cable;
an expansion member spaced with the conductive member; and
an insulation member covering a periphery of the conductive member and a periphery of the expansion member, the insulation member having a through hole;
wherein:
the expansion member is configured to expand and overflow to an outer surface of the insulation member through the through hole when a temperature of the expansion member reaches a threshold; and
the expansion member comprises an insulating expansion body and a wrapping member covering the insulating expansion body, a melting point of the wrapping member is lower than a melting point of the insulation member, the wrapping member is configured to melt when the temperature of the expansion member reaches the threshold, and the insulating expansion body is configured to expand and overflow to the outer surface of the insulation member through the through hole when the wrapping member melts.
2. The cable according to claim 1 , wherein the through hole is one of a plurality of through holes spaced along the longitudinal direction.
3. The cable according to claim 2 , wherein the plurality of through holes are equally spaced.
4. The cable according to claim 2 , wherein a cross-section of the through hole perpendicular to an axial direction of the through hole is circular, elliptical, or rectangular.
5. The cable according to claim 1 , wherein the conductive member is one of a plurality of conductive members spaced along a first direction, the expansion member is arranged between the spaced conductive members, and the first direction is perpendicular to the longitudinal direction.
6. The cable according to claim 5 , wherein the through hole is arranged at at least one end of the expansion member along a second direction, and the second direction, the first direction, and the longitudinal direction are perpendicular to each other.
7. The cable according to claim 1 , wherein the expansion member is arranged on one side of the conductive member along a second direction, and the second direction and the longitudinal direction are perpendicular to each other.
8. The cable according to claim 7 , wherein the through hole is arranged on a side of the expansion member away from the conductive member along the second direction.
9. The cable according to claim 1 , wherein a material of the insulating expansion body includes expandable graphite.
10. The cable according to claim 1 , wherein a material of the wrapping member includes polyethylene terephthalate, and a material of the insulation member includes polypropylene.
11. A battery comprising:
multiple battery cells;
a busbar electrically connected to the multiple battery cells; and
the cable according to claim 1 , wherein the conductive member of the cable is connected to the busbar.
12. An electricity consuming device comprising the battery according to claim 11 , wherein the battery is configured to provide electrical energy.