BATTERY CELL, METHOD AND SYSTEM FOR MANUFACTURING BATTERY CELL, BATTERY AND ELECTRICAL APPARATUS

1 . A battery cell, comprising:

a housing, wherein an outer surface of the housing comprises a first surface and a second surface oppositely arranged along a first direction, and two third surfaces oppositely arranged along a second direction, wherein each of the third surfaces is connected to the first surface and the second surface, the housing is provided with a recess recessed relative to the first surface, and at least one end of the recess along the second direction extends to the third surface;

an electrode component accommodated within the housing;

a first electrode terminal configured to be electrically connected to the electrode component, wherein at least a part of the first electrode terminal is accommodated within the recess; and

a second electrode terminal configured to be electrically connected to the electrode component and protruding from the second surface, wherein the first electrode terminal and the second electrode terminal have opposite polarities;

wherein under a condition that a plurality of battery cells are arranged along the first direction, the recess of the battery cell is configured to accommodate at least a part of a second electrode terminal of an adjacent battery cell, so that the first electrode terminal and the second electrode terminal accommodated within the recess are electrically connected.

2 . The battery cell according to claim 1 , wherein two ends of the recess along the second direction extend to the two third surfaces respectively.

3 . The battery cell according to claim 1 , wherein along the first direction, a size of a part of the first electrode terminal protruding from a bottom surface of the recess is L 1 , a size of a part of the second electrode terminal protruding from the second surface is L 2 , and a depth of the recess is H, wherein L 1 , L 2 , and H satisfy:

H≤L 1+ L 2.

4 . The battery cell according to claim 1 , wherein

the first electrode terminal is provided with a first fit portion, and the second electrode terminal is provided with a second fit portion; and

under a condition that the plurality of battery cells are arranged along the first direction, the first electrode terminal and the second electrode terminal accommodated within the recess are connected by a concave-convex fit of the first fit portion and the second fit portion.

5 . The battery cell according to claim 1 , wherein an area of the first surface is the same as an area of the second surface, and the first surface and the second surface are surfaces having a largest area among all surfaces of the housing.

6 . The battery cell according to claim 1 , wherein a part of the first electrode terminal positioned outside the housing is completely accommodated within the recess.

7 . The battery cell according to claim 1 , wherein the first electrode terminal and the second electrode terminal are correspondingly arranged along the first direction.

8 . The battery cell according to claim 1 , wherein a projection of the first electrode terminal along the first direction does not overlap with a projection of the second electrode terminal along the first direction.

9 . The battery cell according to claim 8 , wherein the projection of the first electrode terminal along the first direction and the projection of the second electrode terminal along the first direction are arranged along a diagonal direction of a projection of the housing along the first direction.

10 . The battery cell according to claim 8 , wherein the projection of the first electrode terminal along the first direction and the projection of the second electrode terminal along the first direction are spaced apart along the second direction.

11 . The battery cell according to claim 10 , wherein the first electrode terminal and the second electrode terminal are installed in a middle region of the housing along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

12 . The battery cell according to claim 1 , wherein

the outer surface of the housing further comprises two fourth surfaces oppositely arranged along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other; and

one end of the recess along the third direction extends to the fourth surface.

13 . The battery cell according to claim 1 , wherein

the housing comprises a housing body and an end cap, wherein an end portion of the housing body along the first direction has an opening, and the end cap covers the opening; and

the first electrode terminal is installed on the end cap, and the second electrode terminal is installed on the housing body; or

the first electrode terminal is installed on the housing body, and the second electrode terminal is installed on the end cap.

14 . A battery comprising a plurality of battery cells according to claim 1 , wherein the plurality of battery cells are arranged along the first direction, the recess of the battery cell is configured to accommodate at least a part of a second electrode terminal of an adjacent battery cell, so that the first electrode terminal and the second electrode terminal accommodated within the recess are electrically connected.

15 . The battery according to claim 14 , wherein the first electrode terminal and the second electrode terminal accommodated within the recess are welded to each other.

16 . An electrical apparatus comprising the battery cell according to claim 1 , wherein the battery cell is configured to provide electrical power.

17 . A method for manufacturing a battery cell, comprising:

providing a housing, a first electrode terminal and a second electrode terminal, wherein an outer surface of the housing comprises a first surface and a second surface oppositely arranged along a first direction, and two third surfaces oppositely arranged along a second direction, wherein each of the third surfaces is connected to the first surface and the second surface, the housing is provided with a recess recessed relative to the first surface, at least one end of the recess along the second direction extends to the third surface, at least a part of the first electrode terminal is accommodated within the recess, and the second electrode terminal protrudes from the second surface;

providing an electrode component; and

installing the electrode component into the housing, and electrically connecting the electrode component to the first electrode terminal and the second electrode terminal;

wherein the first electrode terminal and the second electrode terminal have opposite polarities, and under a condition that a plurality of battery cells are arranged along the first direction, the recess of the battery cell is configured to accommodate at least a part of a second electrode terminal of an adjacent battery cell, so that the first electrode terminal and the second electrode terminal accommodated within the recess are electrically connected.

18 . A system for manufacturing a battery cell, comprising:

a first providing apparatus configured to provide a housing, a first electrode terminal and a second electrode terminal, wherein an outer surface of the housing comprises a first surface and a second surface oppositely arranged along a first direction, and two third surfaces oppositely arranged along a second direction, wherein each of the third surfaces is connected to the first surface and the second surface, the housing is provided with a recess recessed relative to the first surface, at least one end of the recess along the second direction extends to the third surface, at least a part of the first electrode terminal is accommodated within the recess, and the second electrode terminal protrudes from the second surface;

a second providing apparatus configured to provide an electrode component; and

an installation apparatus configured to install the electrode component into the housing, and electrically connect the electrode component to the first electrode terminal and the second electrode terminal;

wherein the first electrode terminal and the second electrode terminal have opposite polarities, and under a condition that a plurality of battery cells are arranged along the first direction, the recess of the battery cell is configured to accommodate at least a part of a second electrode terminal of an adjacent battery cell, so that the first electrode terminal and the second electrode terminal accommodated within the recess are electrically connected.