Patent ID: 11881588
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 7:
8. A battery module comprising two or more secondary batteries, wherein the two or more secondary batteries are disposed side by side, wherein each of the two or more secondary batteries comprises:
a housing comprising a receiving hole with an opening;
a top cover assembly hermetically connected with the housing to close the opening;
an electrode assembly disposed in the receiving hole, and comprising two end faces located on two sides of the electrode assembly and opposite to each other in a first direction perpendicular to an axial direction of the receiving hole, wherein for an end face selected from the two end faces, the end face comprises a first area and a second area, and a pole tab extending out of the first area of the end face, wherein the electrode assembly comprises two or more electrode units stacked along the axial direction, and along a second direction perpendicular to the axial direction and the first direction, a size of the pole tab is smaller than a size of the end face; and
a current collector comprising a main body, wherein the main body is configured to be substantially parallel to the end face, and be at least partially located between the second area of the end face and the housing, and the main body is further configured to extend along the axial direction, be electrically connected with the pole tab, and at least partially overlap with the pole tab along the second direction,
wherein each of the electrode units comprises two wide surfaces and two narrow surfaces connecting the two wide surfaces, the two wide surfaces are opposed to each other in the axial direction, and one of the wide surfaces and one of the narrow surfaces are alternately disposed,
the two narrow surfaces are arranged opposite to each other in the second direction, the opening of the housing is located at an end of the receiving hole in the axial direction,
the current collector further comprises a transition portion and a current collecting sheet electrically connected with the main body, the transition portion is substantially parallel to the end face, extends along the second direction between the first area of the end face and the housing, the current collecting sheet is connected to an edge of the transition portion along the axial direction, wherein the current collecting sheet is configured to be connected and fixed with the pole tab, the transition portion, the current collecting sheet and the pole tab are located on the same side of the main body in the second direction, the current collecting sheet is foldable and is substantially parallel to the transition portion after folding, and the pole tab which has been bent along the first direction is connected and fixed to a surface of the current collecting sheet which has been bent away from the end face of the electrode assembly toward the transition portion.