CN-122000547-A - Battery device and electricity utilization device

Abstract

The application discloses a battery device and an electric device, wherein the battery device comprises a box body, a battery unit assembly and a heat exchange assembly, the battery unit assembly is arranged in the box body and comprises a plurality of battery units, the heat exchange assembly is used for exchanging heat with the battery units and comprises a plurality of heat exchange units and a plurality of current collecting pieces, each heat exchange unit is formed into a heat exchange pipe and is provided with a heat exchange flow channel, at least part of the heat exchange unit is bent and extended, each heat exchange unit is provided with two connecting ends in the extending direction, each current collecting piece is provided with two current collecting ports, the two connecting ends of each heat exchange unit are respectively connected with the current collecting ports of different current collecting pieces, the plurality of current collecting pieces are sequentially connected with the plurality of heat exchange units, and the plurality of current collecting pieces are distributed along the horizontal direction. According to the battery device, the structure of the layout heat exchange assembly is optimized, so that effective utilization of space in the battery device can be realized, the overall height size of the battery device can be reduced, and the energy density of the battery device can be improved.

Inventors

• Wu Guangdang
• GUO YONGXIANG
• LUO WENCHAO

Assignees

• 宁德时代新能源科技股份有限公司

Dates

Publication Date

20260508

Application Date

20241101

Claims (20)

1. 1. A battery device, characterized by comprising: A case; the battery cell assembly is arranged in the box body and comprises a plurality of battery cells; The heat exchange assembly is used for exchanging heat with the battery monomer assembly, and the heat exchange assembly comprises a plurality of heat exchange units and a plurality of current collecting pieces, each heat exchange unit is formed into a heat exchange pipe and is provided with a heat exchange flow channel, at least part of each heat exchange unit is bent and extended, each heat exchange unit is provided with two connecting ends in the extending direction, each current collecting piece is provided with two current collecting ports, each two connecting ends of each heat exchange unit are respectively connected with different current collecting ports of the current collecting pieces, a plurality of current collecting pieces are sequentially connected with a plurality of heat exchange units, and a plurality of current collecting pieces are distributed along the horizontal direction.
2. 2. The battery device according to claim 1, wherein a difference in height between any two of the current collectors in the up-down direction is less than or equal to 2mm.
3. 3. The battery device according to claim 1, wherein a difference in thickness dimension between any two of the current collectors in the up-down direction is less than or equal to 2mm.
4. 4. The battery device according to claim 1, wherein a thickness dimension of the individual current collector in the up-down direction is less than or equal to 14mm.
5. 5. The battery device according to claim 4, wherein the thickness dimension of each current collector in the up-down direction is in the range of 8mm to 13mm.
6. 6. The battery device according to claim 1, wherein a ratio of a thickness dimension of the single current collector in the up-down direction to a thickness dimension of the single heat exchange unit in the up-down direction is less than 1.8.
7. 7. The battery device according to claim 6, wherein a ratio of a thickness dimension of the single current collector in the up-down direction to a thickness dimension of the single heat exchange unit in the up-down direction is in a range of 1.2 to 1.7.
8. 8. The battery device of claim 1, wherein two current collector ports of a single current collector are located on opposite sides of the current collector.
9. 9. The battery device of claim 1, wherein the connection end is inserted into the current collecting port and/or the connection end is welded to the current collecting member.
10. 10. The battery device of claim 1, wherein at least some of the current collectors are spaced apart.
11. 11. The battery device of claim 1, wherein at least a portion of the current collector is arranged in a first direction, the first direction being a length direction of the case.
12. 12. The battery device of claim 11, wherein the positions of at least two of the current collectors in a second direction along the first direction are at least partially offset, the second direction being a width direction of the case.
13. 13. The battery device according to claim 11, wherein at least part of the current collectors are provided with a liquid inlet cavity and a liquid inlet communicated with the liquid inlet cavity, at least part of the current collectors are provided with a liquid outlet cavity and a liquid outlet communicated with the liquid outlet cavity, and the liquid inlets or the liquid outlets of two adjacent current collectors in the first direction are staggered in the second direction, and the second direction is the width direction of the box body.
14. 14. The battery device of claim 11, wherein two of said current collecting ports of a single current collector are located on opposite sides of said current collector in a second direction, said second direction being a width direction of the case.
15. 15. The battery device of claim 1, wherein a plurality of the current collectors are located at the same end of the heat exchange assembly in a first direction, the first direction being a length direction of the case.
16. 16. The battery device according to claim 1, wherein a plurality of the heat exchanging units are connected in series in a ring structure by a plurality of the current collectors.
17. 17. The battery device of claim 1, wherein at least a portion of the current collector has a liquid inlet chamber and a liquid inlet in communication with the liquid inlet chamber, at least a portion of the current collector has a liquid outlet chamber and a liquid outlet in communication with the liquid outlet chamber, one of the two connection ends of each of the heat exchange units is in communication with the liquid inlet chamber through the current collector and the other of the two connection ends of each of the heat exchange units is in communication with the liquid outlet chamber through the current collector.
18. 18. The battery device of claim 17, wherein the number of heat exchange units is two, the number of current collectors is two, one current collector has a liquid inlet cavity and a liquid inlet communicated with the liquid inlet cavity, and the other current collector has a liquid outlet cavity and a liquid outlet communicated with the liquid outlet cavity.
19. 19. The battery device according to claim 1, wherein the heat exchange assembly includes a connection bracket, the connection bracket being connected between at least two of the heat exchange units.
20. 20. The battery device of claim 19, wherein the connection bracket is welded to the heat exchange unit.

Description

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 In the related art, in order to make the battery device operate in a suitable temperature range, a heat exchange assembly is generally provided to exchange heat with a battery cell of the battery device so as to adjust the temperature of the battery cell. After the heat exchange assembly is introduced, the size of the entire battery device increases accordingly. Therefore, after a heat exchange component for exchanging heat of the battery unit is introduced into the battery device, how to effectively utilize the space in the battery device so as to reduce the size of the battery device becomes a technical problem to be solved. Disclosure of Invention In view of the above, the present application provides a battery device and an electricity consumption device, where the battery device can be beneficial to achieve effective utilization of space in the battery device by optimizing a structure of a layout heat exchange assembly, to reduce the overall height dimension of the battery device, and to improve the energy density of the battery device. The application provides a battery device which comprises a box body, a battery unit component and a heat exchange component, wherein the battery unit component is arranged in the box body and comprises a plurality of battery units, the heat exchange component is used for exchanging heat with the battery unit component and comprises a plurality of heat exchange units and a plurality of current collecting pieces, each heat exchange unit is formed into a heat exchange pipe and is provided with a heat exchange flow channel, at least part of each heat exchange unit is bent and extends, two connecting ends are arranged in the extending direction of each heat exchange unit, each current collecting piece is provided with two current collecting ports, the two connecting ends of each heat exchange unit are respectively connected with the current collecting ports of different current collecting pieces, and the plurality of current collecting pieces are sequentially connected with the plurality of heat exchange units and are distributed in the horizontal direction. In the above technical scheme, through setting up the heat exchange component in the battery device to including a plurality of heat transfer units and a plurality of collector, a plurality of heat transfer units connect gradually through a plurality of collector, the heat transfer medium that flows in the plurality of heat transfer units can be through a plurality of collector orderly leading-in and leading-out, through the structure of optimizing overall arrangement heat exchange component, set up the collector to a plurality of arranging along the horizontal direction, can make full use of the space of the horizontal direction in the battery device, can reduce the space of the altitude direction that the collector occupy like this, can be favorable to realizing the effective utilization to the battery device interior space, be favorable to reducing battery device's whole height dimension, and be favorable to promoting battery device's energy density. In some embodiments, the difference in height between any two of the current collectors in the up-down direction is less than or equal to 2mm. In the technical scheme, the height difference of the central positions of the height directions of any two current collectors is smaller than or equal to 2mm by designing the position relation of the current collectors in the height directions, so that the current collectors distributed along the horizontal direction are distributed at the same height, occupation of the space of the current collectors in the height directions can be reduced better, and the overall height dimension of the battery device is reduced more favorably. In some embodiments, the difference in thickness dimension between any two of the current collectors in the up-down direction is less than or equal to 2mm. In the technical scheme, the dimensional relation of the plurality of current collectors in the height direction is designed, so that the difference of the thickness sizes of any two current collectors in the height direction is smaller than or equal to 2mm, the thickness sizes of the plurality of current collectors in the height direction are smaller or are substantially consistent, occupation of the plurality of current collectors in the height direction in space can be better reduced, and the overall height size of the battery device is more favorably reduced. In some embodiments, the thickness dimension of the individual current collector in the up-down direction is less than or equal to 14mm. In the technical scheme, the thickness dimension of the single current collector in the height direction is smaller than or equal to 14mm by designing