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CN-122000573-A - Battery device and electricity utilization device

CN122000573ACN 122000573 ACN122000573 ACN 122000573ACN-122000573-A

Abstract

The application discloses a battery device and an electricity utilization device, wherein the battery device comprises a box body, a battery unit component is arranged in the box body and comprises a plurality of battery units which are arranged in a stacked mode, the stacking direction of first surfaces of the battery units in the battery unit component is a first direction, the first direction is the width direction of the box body, the first surface is the surface with the largest area in the side surface of the battery unit, and the heat exchange component comprises at least two heat exchange pipes which are bent and extended and define a heat exchange flow channel for conducting a heat exchange medium. In the above technical scheme, the width dimension of the box body can be matched by adjusting the number of the battery cells in the battery cell assembly, the space utilization rate of the width direction of the box body is improved, the energy density of the battery device is improved, and the bending position and the arrangement density of the bending and extending heat exchange tube can be adjusted according to the arrangement mode of the battery cell assembly, so that the heat exchange efficiency of the battery cell assembly is effectively improved.

Inventors

  • GUO YONGXIANG
  • Wu Guangdang
  • 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 (1000), characterized by comprising: A case (100); The battery cell assembly (200) is arranged in the box body (100), the battery cell assembly (200) comprises a plurality of battery cells (210) which are arranged in a stacked mode, and the battery cells (210) are electrically connected; the direction of lamination of the first surfaces of the plurality of battery cells (210) in the battery cell assembly (200) is a first direction (Y), the first direction (Y) is the width direction of the box body (100), and the first surface is the surface with the largest area in the side surfaces of the battery cells (210); The heat exchange assembly (300) is used for exchanging heat with the battery unit assembly (200), the heat exchange assembly (300) comprises at least two heat exchange pipes (30) which are bent and extended, and the heat exchange pipes (30) define a heat exchange flow channel (31) for conducting a heat exchange medium.
  2. 2. The battery device (1000) of claim 1, wherein the battery cell assembly (200) comprises a plurality of rows of battery cells (210), the plurality of battery cells (210) being stacked in a row along the first direction (Y), the plurality of rows of battery cells (210) being arranged in the battery cell assembly (200) along a second direction (X), wherein the second direction (X) is perpendicular to the first direction (Y) and the second direction (X) is a direction of stacking of second surfaces of the plurality of battery cells (210), the second surface being a surface of smallest area of the sides of the battery cells (210); the heat exchange assembly (300) is arranged on at least one side of the battery cell assembly (200) in a third direction (Z), and the third direction (Z) is arranged at an included angle with the first direction (Y) and the second direction (X).
  3. 3. The battery device (1000) according to claim 2, wherein at least part of the heat exchange flow channels (31) of any one of the heat exchange tubes (30) form flow channel bodies (311), the flow channel bodies (311) of at least two of the heat exchange tubes (30) being arranged along the second direction (X).
  4. 4. A battery device (1000) according to claim 3, wherein the heat exchange flow channel (31) comprises a lateral portion (3101) and a longitudinal portion (3102), the longitudinal portion (3102) extending in the second direction (X), the lateral portion (3101) extending in the first direction (Y), wherein the longitudinal portion (3102) is closer to an edge of the case (100) than the lateral portion (3101).
  5. 5. The battery device (1000) according to claim 4, wherein a plurality of the lateral portions (3101) in the flow channel body (311) are provided at intervals in the first direction (Y) and are connected in sequence, and the longitudinal portion (3102) in the flow channel body (311) is connected to at least a part of the lateral portions (3101).
  6. 6. The battery device (1000) according to claim 3, wherein the flow channel body (311) includes a first heat exchanging portion (3111) and a second heat exchanging portion (3112), the first heat exchanging portion (3111) being bent and extended and defining a U-shaped region, the second heat exchanging portion (3112) being bent and arranged within the U-shaped region, the second heat exchanging portion (3112) being bent and connected to one end of the first heat exchanging portion (3111).
  7. 7. The battery device (1000) according to claim 6, wherein the second heat exchanging portion (3112) includes a plurality of lateral portions (3101), the plurality of lateral portions (3101) extending along the first direction (Y) and being arranged at intervals in the second direction (X), the plurality of lateral portions (3101) of the second heat exchanging portion (3112) being connected sequentially along the second direction (X).
  8. 8. The battery device (1000) according to claim 7, wherein a connection position of two adjacent lateral portions (3101) of the first heat exchanging portion (3111) is bent in a semicircular arc shape.
  9. 9. The battery device (1000) according to claim 6, wherein the first heat exchanging portion (3111) includes two lateral portions (3101) and one longitudinal portion (3102), the two lateral portions (3101) extending along the first direction (Y) and being arranged at intervals in the second direction (X), the longitudinal portion (3102) extending along the first direction (Y) and being connected between the two lateral portions (3101).
  10. 10. The battery device (1000) according to claim 9, wherein connection positions of the two lateral portions (3101) and the longitudinal portion (3102) of the first heat exchanging portion (3111) are each bent in a quarter-circular arc shape.
  11. 11. A battery device (1000) according to claim 3, wherein the inlet (3103) and the outlet (3104) of a plurality of the heat exchanging channels (31) are both located at the same end of the battery device (1000) in the second direction (X).
  12. 12. The battery device (1000) according to claim 11, 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.
  13. 13. The battery device (1000) according to claim 11, 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 second direction (X).
  14. 14. The battery device (1000) according to claim 13, wherein the first connection portion (312) is closer to an edge of the case (100) than the second connection portion (313) in the first direction (Y).
  15. 15. The battery device (1000) according to claim 13, 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 a first direction (Y).
  16. 16. The battery device (1000) according to claim 13, wherein a connection position of the first connection portion (312) and the flow path body (311) is bent into a quarter-circular arc shape, and/or, The connection position of the second connection part (313) and the flow passage main body (311) is bent into a quarter arc shape.
  17. 17. A battery device (1000) according to claim 3, 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 the ratio of the extension lengths of any two of the heat exchange flow channels (31) is 0.8-1.2.
  18. 18. The battery device (1000) according to claim 17, wherein the number of the heat exchange channels (31) is two and is a first heat exchange channel (31 a) and a second heat exchange channel (31 b), respectively, the inlet (3103) and the outlet (3104) of the two heat exchange channels (31) are both located at the same end of the battery device (1000) in the second direction (X), the channel body (311) of the first heat exchange channel (31 a) is disposed close to the inlet (3103) and the outlet (3104), Wherein the ratio of the extension length of the second heat exchange flow channel (31 b) to the extension length of the first heat exchange flow channel (31 a) is 1 or more and 1.2 or less.
  19. 19. The battery device (1000) according to claim 2, wherein the heat exchange flow channel (31) has a first width, the battery cell (210) has a second width in the second direction (X), and a ratio of the first width to the second width is one third or more.
  20. 20. The battery device (1000) according to claim 2, wherein the battery cell (210) has a first wall surface for heat exchange with the heat exchange tube (30), and an area of the heat exchange tube (30) projected forward on the first wall surface is equal to or larger than one third of an 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, the box body of the battery device provides an installation space for the battery monomer for accommodating and protecting the battery monomer, however, the internal space cannot be fully utilized because the degree of freedom of the size design of the box body is not high, and the improvement of the energy density of the battery device is affected. 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 space utilization rate of a box body, improve the energy density of the battery device and better match the requirements of installation spaces of different electric devices. In a first aspect, an embodiment of the application provides a battery device, which comprises a box body, a battery unit component, a heat exchange component and a heat exchange component, wherein the battery unit component is arranged in the box body and comprises a plurality of battery units which are arranged in a stacked mode, the battery units are electrically connected, the stacking direction of first surfaces of the battery units in the battery unit component is a first direction, the first direction is the width direction of the box body, the first surface is the surface with the largest area in the side surface of the battery unit, the heat exchange component is used for exchanging heat with the battery unit component, and the heat exchange component comprises at least two heat exchange pipes which are bent and extended, and the heat exchange pipes define a heat exchange flow channel for conducting a heat exchange medium. In the above technical scheme, because the range upon range of direction of the biggest first surface of area of a plurality of battery monomer in the battery monomer subassembly is along the width direction of box, make a plurality of battery monomer in the battery monomer subassembly range upon range of arranging along the width direction of box, and be used for including bending at least two heat exchange tubes that extend with the heat exchange component of battery monomer subassembly heat transfer, like this, can be through the free quantity of adjusting the battery monomer in the battery monomer subassembly, the width dimension of matching box, improve the space utilization to the box width direction, promote battery device's energy density, can also make the degree of freedom of the design of the width dimension of the box of battery device higher, can match the demand of the installation space of different power consumption devices better, in addition, the heat exchange tube that the extension of buckling can be according to the mode of arranging of battery monomer subassembly adjustment bending position and density of arranging, thereby effectively improve the heat exchange efficiency to the battery monomer subassembly, promote the temperature homogeneity in the battery monomer subassembly. In some embodiments, the battery cell assembly comprises a plurality of rows of battery cells stacked in a first direction, the plurality of rows of battery cells being arranged in a second direction, wherein the second direction is perpendicular to the first direction, the second direction is the stacking direction of second surfaces of the plurality of battery cells, the second surface is the surface with the smallest area in the side surfaces of the battery cells, and the heat exchange assembly is arranged on at least one side of the battery cell assembly in a third direction, and the third direction is arranged at an included angle with the first direction and the second direction. In the above technical scheme, because the minimum second surface of the single area of many rows of battery among the battery unit spare is perpendicular to the length direction of box, make the single range of battery among the battery unit spare range upon range of arranging in proper order along the length direction of box, from this, can match the width size of box through the single quantity of the battery among the adjustment battery unit spare, adjust the single quantity of many rows of battery unit spare, match the length size of box, improve the space utilization to box width direction and length direction, promote battery device's energy density. Meanwhile, the heat exchange assembly comprises at least two heat exchange pipes which are used for exchanging heat with the battery unit assembly and bending and extending, the bending and extending heat exchange pipes can adjust bending positions and arrangement densities according to arrangement modes of the battery unit as