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CN-122000574-A - Battery device and electricity utilization device

CN122000574ACN 122000574 ACN122000574 ACN 122000574ACN-122000574-A

Abstract

The application discloses a battery device and an electricity consumption device, the battery device 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 comprises a plurality of heat exchange channels, at least part of each heat exchange channel is formed into a channel main body, the channel main bodies of at least two heat exchange channels are arranged along a first direction, each heat exchange channel comprises an extension part and a bending part, at least part of the extension parts of the plurality of heat exchange channels extend along the first direction, the bending part bends and extends in a second direction in a reciprocating manner, the extension parts are wrapped on the outer sides of the bending parts in a first plane, the first direction and the second direction are both positioned in the first plane, and the heat exchange component is arranged on at least one side of the battery unit component in a third direction. In the technical mode, the temperature uniformity in the battery device can be improved, and the heat exchange efficiency of the battery monomer assembly can also be improved.

Inventors

  • SONG FEITING
  • SU TAO
  • CHEN XUBIN
  • WEI JIANQING

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 (1000), characterized by comprising: A case (100); The battery cell assembly (200) is arranged in the box body (100), and the battery cell assembly (200) comprises a plurality of battery cells (210); The heat exchange assembly (300) comprises a plurality of heat exchange flow channels (31), at least part of each heat exchange flow channel (31) is formed into a flow channel main body (311), at least two flow channel main bodies (311) of each heat exchange flow channel (31) are arranged along a first direction (X), each heat exchange flow channel (31) comprises an extension part (41) and a bending part (42), at least part of the extension parts (41) of the plurality of heat exchange flow channels (31) extend along a first direction (X), the bending parts (42) are bent and extended in a second direction (Y) in a reciprocating manner, the extension parts (41) are wrapped on the outer sides of the bending parts (42) in a first plane, the first direction (X) and the second direction (Y) are both positioned in the first plane, and the heat exchange assembly (300) is arranged on at least one side of the battery cell assembly (200) in a third direction (Z) and used for exchanging heat with the battery cell (210), and the first direction (X), the second direction (Y) and the third direction (Z) are intersected with the second direction (Z).
  2. 2. The battery device (1000) according to claim 1, wherein the extending portions (41) of the plurality of heat exchanging channels (31) constitute four extending sections, the four extending sections are sequentially arranged in the circumferential direction of the heat exchanging assembly (300), and the four extending sections collectively encapsulate the bent portions (42) of the plurality of heat exchanging channels (31).
  3. 3. The battery device (1000) according to claim 2, wherein the four extension sections are a first extension section (4 a), a second extension section (4 b), a third extension section (4 c) and a fourth extension section (4 d), respectively, the first extension section (4 a) and the third extension section (4 c) each extend in the first direction (X) and are arranged at intervals in the second direction (Y), and the second extension section (4 b) and the fourth extension section (4 d) each extend in the second direction (Y) and are arranged at intervals in the first direction (X).
  4. 4. The battery device (1000) according to claim 1, wherein adjacent two of the extensions (41) are connected or arranged at intervals in the circumferential direction of the heat exchange assembly (300).
  5. 5. The battery device (1000) according to claim 1, wherein each of the heat exchange flow passages (31) includes at least two of the extending portions (41), the plurality of extending portions (41) of the heat exchange flow passage (31) are connected in sequence, and the extending directions of the connected two extending portions (41) are different, and the bent portion (42) is connected on a downstream side or an upstream side of the plurality of extending portions (41) in the fluid flow direction.
  6. 6. The battery device (1000) according to claim 1, wherein the flow channel body (311) comprises two extension portions (41) and one bending portion (42), the two extension portions (41) are a first extension portion (41) and a second extension portion (41), respectively, the first extension portion (41) extends along the second direction (Y), the second extension portion (41) extends along the first direction (X), the first extension portion (41), the second extension portion (41) and the bending portion (42) are sequentially connected, and the bending portion (42) is arranged on a side of the two extension portions (41) facing away from the edge of the case (100).
  7. 7. The battery device (1000) according to claim 6, wherein the bending portion (42) includes a plurality of lateral portions (3101), the plurality of lateral portions (3101) extend in a second direction (Y) and are arranged at intervals in the first direction (X), the second direction (Y) being a width direction of the battery device (1000), and the plurality of lateral portions (3101) of the bending portion (42) are sequentially bent and connected in the first direction (X).
  8. 8. The battery device (1000) according to claim 7, wherein a connection position of two adjacent lateral portions (3101) is bent in a semicircular arc shape.
  9. 9. The battery device (1000) according to claim 6, wherein a connection position of the first extension portion (41) and the second extension portion (41) is bent in a quarter-circular arc shape, and a connection position of the second extension portion (41) and the bent portion (42) is bent in a quarter-circular arc shape.
  10. 10. The battery device (1000) according to claim 1, wherein the inlet (3103) and the outlet (3104) of the plurality of heat exchange channels (31) are both located at the same end of the battery device (1000) in the first direction (X).
  11. 11. The battery device (1000) according to claim 10, wherein inlets (3103) of a plurality of the heat exchange flow channels (31) are all communicated, and outlets (3104) of a plurality of the heat exchange flow channels (31) are all communicated.
  12. 12. The battery device (1000) according to claim 10, wherein the plurality of heat exchange flow channels (31) includes a first heat exchange flow channel (31 a) and a second heat exchange flow channel (31 b), the flow channel body (311) of the first heat exchange flow channel (31 a) being disposed closest to the inlet (3103) and the outlet (3104), The second heat exchange flow channel (31 b) further comprises a first connecting part (312) and a second connecting part (313), wherein the first connecting part (312), the flow channel main body (311) and the second connecting part (313) are sequentially connected, one end, far away from the flow channel main body (311), of the first connecting part (312) forms the inlet (3103), one end, far away from the flow channel main body (311), of the second connecting part (313) forms the outlet (3104), and the first connecting part (312) and the second connecting part (313) extend along the first direction (X).
  13. 13. The battery device (1000) according to claim 12, wherein the first connection portion (312) is closer to an edge of the case (100) than the second connection portion (313) in the second direction (Y).
  14. 14. The battery device (1000) according to claim 12, wherein the first connection portion (312) and the second connection portion (313) are arranged on the same side of the first heat exchange flow passage (31 a) in the second direction (Y).
  15. 15. The battery device (1000) of claim 14, wherein the first connection portion (312) is in heat exchange engagement with the outermost battery cell (210) of the battery cell assembly (200) disposed in the second direction (Y).
  16. 16. The battery device (1000) according to claim 14, wherein a spacing of the first connection portion (312) and the second connection portion (313) in the second direction (Y) is smaller than a thickness of the battery cell (210) in the second direction (Y).
  17. 17. The battery device (1000) according to claim 1, wherein each of the heat exchange flow channels (31) has an inlet (3103) and an outlet (3104), and each of the heat exchange flow channels (31) extends from the inlet (3103) to the outlet (3104), wherein a ratio of extension lengths of any two of the heat exchange flow channels (31) is 0.8-1.2.
  18. 18. The battery device (1000) of claim 1, wherein the battery cell assembly (200) comprises a plurality of rows of battery cells (210), a plurality of the battery cells (210) being stacked in a row along the second direction (Y), the plurality of rows of battery cells (210) being arranged in the battery cell assembly (200) along the first direction (X), The number of the battery cell assemblies (200) is multiple, and the battery cell assemblies (200) are sequentially arranged along the first direction (X).
  19. 19. The battery device (1000) according to claim 18, wherein the heat exchange flow channel (31) has a first width, the battery cell (210) has a second width in the first direction (X), and a ratio of the first width to the second width is one third or more.
  20. 20. The battery device (1000) of claim 1, wherein the heat exchange assembly (300) includes a plurality of heat exchange tubes (30), each of the heat exchange tubes (30) defining the heat exchange flow channel (31), The battery unit (210) is provided with a first wall surface matched with the heat exchange tube (30) for heat exchange, the first wall surface is taken as a projection surface, and the orthographic projection area of the heat exchange tube (30) on the first wall surface is more than or equal to one third of the area of the first wall surface.

Description

Battery device and electricity utilization device Technical Field The application relates to the technical field of batteries, in particular to a battery device and an electricity utilization device. Background In the prior art, in order to ensure normal operation and service life of the battery, a heat exchange piece is usually arranged in the battery, and the heat exchange piece can exchange heat with the battery monomers so as to adjust the temperature of each battery monomer, thereby ensuring the service life of the battery. However, at present, uniformity of temperature among a plurality of battery cells in a battery is still further improved. Content of the application The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application aims to provide a battery device and an electric device comprising the battery device, wherein the battery device can improve the temperature uniformity in the battery device and improve the heat exchange efficiency of a battery unit assembly. The embodiment of 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 comprises a plurality of heat exchange channels, at least part of each heat exchange channel is formed into a channel main body, the channel main bodies of at least two heat exchange channels are arranged along a first direction, each heat exchange channel comprises an extension part and a bending part, at least part of the extension parts of the plurality of heat exchange channels extend along the first direction, the bending part bends and extends in a second direction in a reciprocating manner, the extension parts are arranged outside the bending part in a first plane, the first direction and the second direction are both positioned in the first plane, the heat exchange component is arranged on at least one side of the battery unit component in a third direction and used for heat exchange with the battery units, and the first direction, the second direction and the third direction are intersected. In the above technical manner, the heat exchange flow channels are formed with the flow channel main bodies, and the flow channel main bodies of at least two heat exchange flow channels are distributed along the length direction of the battery device, so that different flow channel main bodies can exchange heat with different areas of the battery device in the length direction, thereby reducing the temperature difference between battery cells of the battery device at different positions in the length direction and improving the temperature uniformity of the battery device in the length direction. Meanwhile, the heat exchange flow channel comprises an extension part and a bending part, the extension part is wrapped on the outer side of the bending part, the extension part can exchange heat with peripheral battery monomers close to the edge of the box body in the plurality of battery monomers, the bending part can exchange heat with battery monomers close to the middle part of the box body, when a heat exchange medium flows into the extension part and the bending part in sequence, the peripheral battery monomers close to the edge of the box body and the battery monomers close to the middle part of the box body can be compensated for the inner and outer temperature difference caused by heat exchange with the environment, so that the heat exchange effect of the peripheral battery monomers close to the edge of the box body and the battery monomers close to the middle part of the box body tends to be consistent, the temperature uniformity of the battery device is improved, and the service life of the battery device is further improved to a certain extent. In some embodiments, the extending portions of the plurality of heat exchange channels form four extending sections, the four extending sections are sequentially arranged along the circumferential direction of the heat exchange assembly, and the four extending sections jointly wrap the bent portions of the plurality of heat exchange channels. In the technical mode, the extending parts of the heat exchange flow channels form four extending sections, the four extending sections are sequentially distributed along the circumferential direction of the heat exchange assembly and cover the bending parts, so that the structure of the heat exchange flow channels can be further compact, the length of the heat exchange flow channels in the circumferential direction of the box body is prolonged, the heat exchange is carried out by attaching with peripheral battery monomers arranged close to the edge of the box body, the heat management efficiency of the peripheral battery monomers is improved, and the temperature uniformity performance among the peripheral battery