CN-122000546-A - Battery device and electricity utilization device

Abstract

The application discloses a battery device and an electricity consumption device, wherein the battery device comprises a box body, a battery unit component and a heat exchange component, 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 units and comprises at least one heat exchange unit, the heat exchange unit is provided with a heat exchange runner part, a heat exchange runner used for conducting a heat exchange medium is arranged in the heat exchange runner part, the heat exchange runner part comprises a straight pipe section extending along a straight line and a bent pipe section extending along an arc line, the bent pipe section is connected between two adjacent straight pipe sections in the extending direction of the heat exchange unit, and the ratio of the bending radius R of the bent pipe section to the width W of the heat exchange runner part is k, wherein k is larger than 0.5. According to the battery device, the heat exchange assembly of the battery device can better meet the heat exchange efficiency and the light weight requirement.

Inventors

• SONG FEITING
• HUANG XIAOTENG
• Hou Yuepan
• SU TAO

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, and the heat exchange assembly comprises at least one heat exchange unit, the heat exchange unit is provided with a heat exchange flow passage part, a heat exchange flow passage used for conducting a heat exchange medium is arranged in the heat exchange flow passage part, the heat exchange flow passage part comprises a straight pipe section extending along a straight line and a bent pipe section extending along an arc line, a bent pipe section is connected between two adjacent straight pipe sections in the extending direction of the heat exchange unit, and the ratio of the bending radius R of the bent pipe section to the width W of the heat exchange flow passage part is k, wherein k is greater than 0.5.
2. 2. The battery device according to claim 1, wherein the value range of k is 1.0 to 1.5.
3. 3. The battery device according to claim 1, wherein the plurality of straight tube sections in the single heat exchange flow path portion include a plurality of first straight tube sections arranged at intervals in the first direction, each of the first straight tube sections extends in the second direction, the plurality of bent tube sections in the single heat exchange flow path portion include a first bent tube section connected between the same ends of two adjacent first straight tube sections in the second direction, and orthographic projections of the first straight tube sections and the first bent tube sections in the third direction are located within orthographic projections of the battery cell assembly in the third direction, and the third direction, the second direction, and the first direction intersect each other.
4. 4. A battery device according to claim 3, wherein the first straight tube section has an extension length L of greater than or equal to 50mm.
5. 5. A battery device according to claim 3, wherein the distance d1 between two adjacent first straight tube sections in the first direction in the same heat exchange flow path portion is larger than the width W of the first straight tube sections.
6. 6. The battery device according to claim 5, wherein a ratio of a distance d1 between adjacent two of the first straight tube sections in the first direction in the same heat exchange flow path portion to a width W of the first straight tube sections is less than 2.
7. 7. The battery device according to claim 3, wherein a ratio of an extension length of the first straight pipe section to an extension length of the first bent pipe section is 0.7 to 2.
8. 8. A battery device according to claim 3, wherein all the first straight tube sections and all the first bent tube sections in a single heat exchange flow path portion constitute a bent body, the plurality of heat exchange units being arranged in sequence in the first direction.
9. 9. The battery device of claim 8, wherein a distance between two adjacent first straight tube segments in the first direction in the same bent body is d1, and a distance between two adjacent first straight tube segments in the first direction in two adjacent bent bodies is d2, d2 being smaller than d1.
10. 10. A battery device according to claim 3, wherein all the first straight tube sections and all the first bent tube sections in a single heat exchange flow path portion constitute a bent main body, and a plurality of the straight tube sections in a single heat exchange flow path portion include second straight tube sections located on at least one side of the bent main body in the second direction, the second straight tube sections extending in the first direction and being connected to the first straight tube sections in the same heat exchange flow path portion.
11. 11. The battery device according to claim 10, wherein a minimum distance d3 between the first bent pipe section and the second straight pipe section in the second direction in the same heat exchange flow path portion is 20mm or more.
12. 12. The battery device according to claim 10, wherein a plurality of the bend sections in a single heat exchange flow path portion include a second bend section that connects the first straight tube section and the second straight tube section in the same heat exchange flow path portion.
13. 13. The battery device according to claim 10, wherein all the first straight tube sections and all the first bent tube sections in the single heat exchange flow path portion constitute a bent body, the number of the heat exchange units is two, the bent bodies of the two heat exchange units are arranged in the first direction, and the two heat exchange units are a first heat exchange unit and a second heat exchange unit, respectively; The first heat exchange unit comprises a second straight pipe section, the second straight pipe section of the first heat exchange unit is located at one side of the bending main body of the first heat exchange unit along the second direction, the second heat exchange unit comprises two second straight pipe sections, the two second straight pipe sections of the second heat exchange unit are located at two sides of the bending main body of the second heat exchange unit along the second direction, the bending main body is provided with a first side and a second side which are opposite in the second direction, the second straight pipe section of the first heat exchange unit and one of the second straight pipe sections of the second heat exchange unit are located at the first side and are distributed along the first direction, and the other second straight pipe section of the second heat exchange unit is located at the second side and extends to one side of the bending main body of the first heat exchange unit along the second direction.
14. 14. The battery device according to claim 13, wherein a minimum distance d3 between the first bent pipe section and the second straight pipe section in the second direction in the same heat exchange flow path portion, and a minimum distance d4 between the second straight pipe section on the second side in the second heat exchange unit and the first bent pipe section in the first heat exchange unit in the second direction is smaller than d3.
15. 15. The battery device according to claim 13, wherein the plurality of straight tube sections in the second heat exchange unit further include a third straight tube section and a fourth straight tube section, the third straight tube section being located on a side of the bent body in the second heat exchange unit away from the bent body in the first heat exchange unit in the first direction, the third straight tube section extending in the second direction, the fourth straight tube section being provided on a side of the second straight tube section located on the second side away from the bent body in the second direction, the fourth straight tube section extending in the first direction, the third straight tube section being connected between the second straight tube section and the fourth straight tube section of the second heat exchange unit.
16. 16. The battery device of claim 15, wherein the plurality of bend sections in the second heat exchange unit further comprises a third bend section and a fourth bend section, the third bend section being connected between the second straight tube section and the third straight tube section of the second heat exchange unit, the fourth bend section being connected between the third straight tube section and the fourth straight tube section.
17. 17. The battery device according to claim 15, wherein a distance between two adjacent first straight tube sections in the first direction in the same heat exchange flow path portion is d1, a distance between the third straight tube section and the nearest first straight tube section in the first heat exchange unit is d5, and a ratio of d5 to d1 is 0.7 to 1.5.
18. 18. The battery device of claim 15, wherein a distance between the fourth straight tube section and the second straight tube section on the second side in the second direction is d6, a thickness direction of the battery cell is consistent with the second direction, and a thickness of the battery cell is t, and d6 is less than t.
19. 19. The battery device of claim 18, wherein the ratio of d6 to t is 0.3 to 0.8.
20. 20. The battery device of claim 3, wherein the battery cell assembly includes one or more battery cell rows arranged in the first direction, each battery cell row including a plurality of the battery cells arranged in the second direction.

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. The heat exchange assembly in the related art has the problem that the heat exchange efficiency per unit mass is lower due to the fact that the weight is large, and therefore the weight of the whole battery device is large, and the light weight requirement of the battery device is not facilitated. Therefore, how to consider the heat exchange efficiency and the light weight requirement of the heat exchange assembly is a technical problem to be solved. Disclosure of Invention In view of the above, the present application provides a battery device and an electric device, in which the heat exchange assembly of the battery device can better satisfy both heat exchange efficiency and light weight requirements. 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 units and comprises at least one heat exchange unit, the heat exchange unit is provided with a heat exchange flow passage part, a heat exchange flow passage used for conducting a heat exchange medium is arranged in the heat exchange flow passage part, the heat exchange flow passage part comprises a straight pipe section extending along a straight line and a bent pipe section extending along an arc, the bent pipe section is connected between two adjacent straight pipe sections in the extending direction of the heat exchange unit, and the ratio of the bending radius R of the bent pipe section to the width W of the heat exchange flow passage part is k, wherein k is larger than 0.5. In the technical scheme, the heat exchange assembly for adjusting the temperature of the battery unit comprises at least one heat exchange unit, the heat exchange flow passage part of the heat exchange unit comprises a straight pipe section and a bent pipe section, the heat exchange flow passage part can be bent and extended, at least part of the heat exchange unit is of a bent and extended heat exchange pipe structure, the heat exchange flow passage part of the heat exchange unit can be compactly distributed, the pipeline distribution density of the heat exchange unit in unit area is larger, the heat exchange area of the heat exchange unit and the heat exchange area of the battery unit can be increased, the heat exchange capacity of the heat exchange assembly in unit area can be improved, the temperature adjustment efficiency of the heat exchange assembly to the battery unit is improved, the overall mass of the heat exchange pipe structure is lighter, the light weight of the battery device is realized, the heat exchange efficiency of the unit mass of the heat exchange assembly is improved, and in addition, the ratio of the bending radius of the bent pipe section to the width of the heat exchange flow passage part is larger than 0.5, and the heat exchange flow passage part is convenient to bend and form in the process of processing the heat exchange unit. In some embodiments, the value range of k is 1.0-1.5. In the technical scheme, the ratio k of the bending radius of the bending pipe section to the width of the heat exchange flow passage part is not less than 1.0, so that the process difficulty of the heat exchange unit in the processing bending process can be reduced, the ratio k of the bending radius of the bending pipe section to the width of the heat exchange flow passage part is not more than 1.5, the pipeline arrangement density of the heat exchange unit is larger, the heat exchange area of the heat exchange unit is larger, and the bending process difficulty and the heat exchange area of the heat exchange unit can be better considered by setting the ratio k of the bending radius of the bending pipe section to the width of the heat exchange flow passage part between 1.0-1.5, so that the processing difficulty of the heat exchange assembly is reduced and the heat exchange area is larger. In some embodiments, the plurality of straight tube sections in the single heat exchange flow path portion include a plurality of first straight tube sections sequentially arranged at intervals along a first direction, each first straight tube section extends along a second direction, the plurality of bent tube sections in the single heat exchange flow path portion include a first bent tube section, the first bent tube section is connected between the same ends of two adjacent first stra