IP Library › Granted Patent US 12665262
Granted Patent B2
US 12665262 · App. 17/888,785 · Granted Jun 23, 2026

Battery, device, and method and apparatus for manufacturing battery

Inventors: Liangyi Wang (Ningde, CN); Feng Qin (Ningde, CN); Lei Wang (Ningde, CN); Jinfeng Li (Ningde, CN)
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED
H01M50/516H01M50/107H01M50/213H01M50/514H01M50/517H01M50/548H01M50/559H01M50/566H01M2220/20Y02E60/10
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Quick Facts
Patent No.
US 12665262
App. No.
17/888,785
Granted
Jun 23, 2026
Kind
B2
Abstract

A battery includes two battery cells arranged along a first direction and including two electrode terminals opposite to each other along the first direction. A first electrode of the two electrode terminals is disposed at an end of a first battery cell of the two battery cells along the first direction, and a second electrode of the two electrode terminals is disposed at an end of a second battery cell of the two battery cells along the first direction. Surface contact is formed between two end faces of the two electrode terminals, respectively. The two end faces are opposite to each other along the first direction. The two electrode terminals are configured to be fixedly connected to each other along an outer periphery of at least one of the two end faces to implement electrical connection between the two battery cells.

Claims (50)

1 . A battery comprising:

two battery cells arranged along a first direction and including two electrode terminals opposite to each other along the first direction, a first electrode terminal of the two electrode terminals being disposed at an end of a first battery cell of the two battery cells along the first direction, and a second electrode terminal of the two electrode terminals being disposed at an end of a second battery cell of the two battery cells along the first direction;

wherein:

surface contact is formed between two end faces of the two electrode terminals, respectively, the two end faces being opposite to each other along the first direction;

one of the two electrode terminals includes a bulge protruding from the end face of the one electrode terminal, and the other of the two electrode terminals includes a recess that sinks from the end face of the other electrode terminal, the recess and the bulge snap- fit with each other in the first direction;

the two electrode terminals are configured to be fixedly connected to each other along an outer periphery of at least one of the two end faces to implement electrical connection between the two battery cells;

a weld portion is formed at the outer periphery of the at least one of the two end faces, and the weld portion is configured to implement fixed connection between the two electrode terminals;

each of the two electrode terminals includes a side face and a connecting face, and the connecting face is configured to connect the end face and the side face;

the two connecting faces of the two electrode terminals are configured to form an accommodation space;

the weld portion is formed in the accommodation space without extending beyond the side face in a second direction, the second direction being perpendicular to the first direction, such that surface levelness across the two side faces of the two electrode terminals corresponding to the accommodation space is maintained; and

a distance between the side face of the electrode terminal including the bulge and an inner sidewall of the recess in the second direction is at least 2 mm.

2 . The battery according to claim 1 , wherein:

a shape of each of the end faces is a closed shape, and a surface enclosed by the closed shape corresponding to each of the end faces is configured to form the surface contact.

3 . The battery according to claim 1 , wherein:

a shape of each of the end faces is a circle, an ellipse, or a polygon.

4 . The battery according to claim 1 , wherein:

the two end faces are equal in area and identical in shape, and projections of the two end faces along the first direction are coincident.

5 . The battery according to claim 1 , wherein:

a first end face of the two end faces is larger in area than a second end face of the two end faces, and a projection of the second end face along the first direction is within a projection of the first end face along the first direction.

6 . The battery according to claim 1 , wherein:

the two electrode terminals are configured to be fixedly connected to each other continuously along the outer periphery of the at least one of the two end faces.

7 . The battery according to claim 1 , wherein:

the two electrode terminals are configured to be fixedly connected to each other discontinuously along the outer periphery of the at least one of the two end faces.

8 . The battery according to claim 1 , wherein:

each of the two electrode terminals protrudes along the first direction away from an interior of a corresponding one of the two battery cells, and a protrusion height of each of the two electrode terminals is at least 2 mm.

9 . The battery according to claim 1 , wherein:

the two battery cells further include two end caps opposite to each other along the first direction and spaced apart from each other by 4 mm to 20 mm;

one of the two end caps is disposed at the end of the first battery cell along the first direction, and another one of the two end caps is disposed at the end of the second battery cell along the first direction; and

each of the two electrode terminals is disposed at a corresponding one of the two end caps.

10 . The battery according to claim 1 , wherein:

the connecting face is an inclined face, a stepped face, or a curved face.

11 . The battery according to claim 1 , wherein:

a stress release portion is formed at an outer periphery of at least one of the two electrode terminals, and the stress release portion is configured to release a stress generated in a case of fixedly connecting the two electrode terminals.

12 . The battery according to claim 11 , wherein:

the stress release portion includes a groove disposed at the outer periphery of the at least one of the two electrode terminals.

13 . The battery according to claim 12 , wherein:

the groove includes an annular groove formed along the outer periphery of the at least one of the two electrode terminals.

14 . The battery according to claim 12 , wherein

in the second direction, a depth of the groove is less than a depth of the weld portion.

15 . A device comprising a battery configured to provide electrical energy, the battery including:

two battery cells arranged along a first direction and including two electrode terminals opposite to each other along the first direction, a first electrode terminal of the two electrode terminals being disposed at an end of a first battery cell of the two battery cells along the first direction, and a second electrode terminal of the two electrode terminals being disposed at an end of a second battery cell of the two battery cells along the first direction;

wherein:

surface contact is formed between two end faces of the two electrode terminals, respectively, the two end faces being opposite to each other along the first direction;

one of the two electrode terminals includes a bulge protruding from the end face of the one electrode terminal, and the other of the two electrode terminals includes a recess that sinks from the end face of the other electrode terminal, the recess and the bulge snap- fit with each other in the first direction;

the two electrode terminals are configured to be fixedly connected to each other along an outer periphery of at least one of the two end faces to implement electrical connection between the two battery cells;

a weld portion is formed at the outer periphery of the at least one of the two end faces, and the weld portion is configured to implement fixed connection between the two electrode terminals;

each of the two electrode terminals includes a side face and a connecting face, and the connecting face is configured to connect the end face and the side face;

the two connecting faces of the two electrode terminals are configured to form an accommodation space;

the weld portion is formed in the accommodation space without extending beyond the side face in a second direction, the second direction being perpendicular to the first direction, such that surface levelness across the two side faces of the two electrode terminals corresponding to the accommodation space is maintained; and

a distance between the side face of the electrode terminal including the bulge and an inner sidewall of the recess in the second direction is at least 2 mm.