CN-122025916-A - Battery device and electricity utilization device

CN122025916ACN 122025916 ACN122025916 ACN 122025916ACN-122025916-A

Abstract

The application provides a battery device and an electricity utilization device, wherein the battery device comprises a battery cell assembly, a thermal management assembly and a sampling assembly, the battery cell assembly comprises a plurality of battery cells arranged along a first direction, each battery cell comprises electrode terminals, two electrode terminals in the battery cells are arranged side by side in a second direction, the electrode terminals are positioned on one side of the battery cells in a third direction, and the first direction, the second direction and the third direction are intersected in pairs. The thermal management assembly is located along a third direction on one side of the battery cell where the electrode terminal is located, and is arranged side by side with the electrode terminal in a second direction. The sampling assembly is positioned on one side of the battery cell, which is provided with the electrode terminal, along the third direction, and the projection of the thermal management assembly and the projection of the sampling assembly are at least partially overlapped in a projection plane perpendicular to the third direction.

Inventors

LI YANHENG
YU KAIQIN
Chen Guize
CHEN ZHIMING
WU XIAOWEI

Assignees

宁德时代新能源科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250926

Claims (12)

1. A battery device, characterized by comprising: The battery cell assembly comprises a plurality of battery cells arranged along a first direction, the battery cells comprise electrode terminals, two of the battery cells are arranged side by side in a second direction, the electrode terminals are positioned on one side of the battery cells in a third direction, and the first direction, the second direction and the third direction are intersected in pairs; a thermal management assembly located at a side of the battery cell where the electrode terminal is located along the third direction, and disposed side by side with the electrode terminal in the second direction; And the sampling assembly is positioned on one side of the battery cell, provided with the electrode terminal, along the third direction, and the orthographic projection of the thermal management assembly and the orthographic projection of the sampling assembly are at least partially overlapped in a projection plane perpendicular to the third direction.
2. The battery device of claim 1, wherein a plurality of the electrode terminals of the battery cell assembly disposed side by side in the first direction form terminal groups, and the sampling assembly and the thermal management assembly are each located between two terminal groups of a single battery cell assembly.
3. The battery device of claim 2, wherein the battery cell further comprises a pressure relief mechanism located between two electrode terminals of the battery cell, an orthographic projection of at least a portion of the pressure relief mechanism being located outside an orthographic projection of the thermal management assembly in a plane perpendicular to the third direction.
4. The battery device according to claim 1, wherein a plurality of the battery cell assemblies are arranged side by side in a second direction, a plurality of the electrode terminals of the battery cell assemblies arranged side by side in the first direction constitute a terminal group, and the sampling assembly and the thermal management assembly are each located between the terminal groups of two adjacent battery cell assemblies.
5. The battery device of claim 1, further comprising a bussing member electrically connected to the electrode terminals, the sampling assembly being connected to the bussing member, and/or the battery cell comprising a housing, the electrode terminals being disposed in the housing, the sampling assembly being connected to the housing.
6. The battery device of claim 5, wherein the sampling assembly is at least partially located on a side of the thermal management assembly facing away from the battery cell, the thermal management assembly is provided with a relief portion extending therethrough in the third direction, and the sampling assembly is partially located within the relief portion and is connected to the housing.
7. The battery device according to any one of claims 1 to 6, wherein the thermal management assembly comprises a heat conducting member and a heat exchanging member located on a side of the heat conducting member facing away from the battery cell assembly, the heat exchanging member is provided with a flow passage through which a heat exchanging medium flows, and a forward projection area of the heat conducting member is larger than a forward projection area of the heat exchanging member in a projection plane perpendicular to the third direction.
8. The battery device of claim 7, wherein the sampling assembly is connected to a side of the heat exchange member facing away from the battery cell assembly, or wherein the sampling assembly is connected between the heat transfer member and the battery cell assembly.
9. The battery device of claim 87, wherein the sampling assembly is coupled to a side of the heat exchange member facing away from the cell assembly, the sampling assembly comprising a body portion extending in the first direction and a first sampling portion coupled to the body portion, the body portion being positioned on a side of the heat exchange member facing away from the cell; The first sampling part comprises a first sub-part and a second sub-part, the two ends of the first sub-part in the third direction are bent and connected with the second sub-part and the body part, and the second sub-part is connected with the heat exchange piece and detects the temperature of the heat exchange piece.
10. The battery device according to claim 9, wherein a plurality of the first sampling portions are provided at intervals in the first direction and connected to the same body portion.
11. The battery device according to any one of claims 1 to 10, wherein the battery cell includes a case including a wall portion, and an electrode assembly located within the case, the electrode terminal being provided to the wall portion and protruding from a surface of a side of the wall portion facing away from the electrode assembly, the battery device further including a bus member connected to a side of the electrode terminal facing away from the electrode assembly; in the third direction, at least a portion of the structure in the sampling assembly is located between the wall portion and the bus member, and/or at least a portion of the structure in the thermal management assembly is located between the wall portion and the bus member.
12. An electrical device comprising a battery device according to any one of claims 1 to 11.

Description

Battery device and electricity utilization device The application is based on the application number 202511385196.5, the application date 2023, 9 and 26, and the application number Ningde, which is a divisional application of the application named battery device and electricity utilization device. Technical Field The present application relates to the field of battery technologies, and in particular, to a battery device and an electric device. Background Battery cells are widely used in electronic devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy vehicles, electric toy ships, electric toy airplanes, electric tools, and the like. In the development of battery technology, how to increase the energy density of a battery device has become one of the research directions in battery technology. Disclosure of Invention In view of the above, the present application provides a battery device and an electric device, which can improve the energy density of the battery device. In one aspect, an embodiment of the present application provides a battery device, where the battery device includes a battery cell assembly, a thermal management assembly, and a sampling assembly, the battery cell assembly includes a plurality of battery cells arranged along a first direction, the battery cells include electrode terminals, two electrode terminals in the battery cells are arranged side by side in a second direction, and the electrode terminals are located at one side of the battery cells in a third direction, where the first direction, the second direction, and the third direction intersect two by two. The thermal management assembly is located along a third direction on one side of the battery cell where the electrode terminal is located, and is arranged side by side with the electrode terminal in a second direction. The sampling assembly is positioned on one side of the battery cell, which is provided with the electrode terminal, along the third direction, and the projection of the thermal management assembly and the projection of the sampling assembly are at least partially overlapped in a projection plane perpendicular to the third direction. In the scheme, the thermal management component and the sampling component are arranged on the side, provided with the electrode terminal, of the battery cell, and orthographic projections of the thermal management component and the sampling component in the projection plane perpendicular to the third direction are at least partially overlapped, so that the avoidance requirement of the thermal management component and the sampling component relative to the electrode terminal is met. And because the two are overlapped in the third direction, the size of the thermal management assembly in the second direction is influenced less by the existence of the sampling assembly, so that the size of the thermal management assembly in the second direction is increased, and the temperature regulation effect of the thermal management assembly on the battery cells is enhanced. Further, with this design, at least one of the thermal management assembly and the sampling assembly can share a space in a third direction with respect to the electrode terminal, thereby reducing the size of the battery device in the third direction and increasing the energy density of the battery device. In addition, when the sampling assembly is used for realizing a voltage sampling function, the design is also beneficial to reducing the distance between the sampling assembly and the electrode terminal, reducing the corresponding line length of the sampling assembly and improving the voltage sampling precision. In some embodiments, a plurality of electrode terminals disposed side by side in a first direction in the battery cell assembly form terminal groups, and the sampling assembly and the thermal management assembly are each located between two terminal groups of a single battery cell assembly. In the above scheme, the sampling assembly and the thermal management assembly are both positioned between the two terminal groups of the single battery cell assembly, so that the size of the sampling assembly and the thermal management assembly is increased by virtue of the larger size of the first area in the second direction, and the requirement of the corresponding space layout of the sampling assembly and the thermal management assembly is met. In some embodiments, the battery cell further comprises a pressure relief mechanism located between the two electrode terminals of the battery cell, an orthographic projection of at least a portion of the pressure relief mechanism being located outside an orthographic projection of the thermal management assembly in a plane of projection perpendicular to the third direction. In the above-described aspect, the sampling assembly is located between two terminal groups of a single battery cell assembly, and the