Search

CN-122000581-A - Battery device and electricity utilization device

CN122000581ACN 122000581 ACN122000581 ACN 122000581ACN-122000581-A

Abstract

The application discloses a battery device and an electricity utilization device, wherein the battery device comprises a box body and a battery monomer component, the battery monomer component is arranged in the box body, the battery monomer component comprises a plurality of battery monomers, and the battery monomers in the battery monomer component are arranged in a lamination way along a second direction and meet the following conditions: According to the battery device, the plurality of battery cells are transversely arranged, so that the occupied area in the box body can be reduced well, the space in the width direction of the box body can be fully utilized, the longitudinal occupation of the box body is reduced, and the layout of the battery cell assembly is more compact. Therefore, the space utilization rate in the box body can be improved, more installation space is reserved for other components, and meanwhile, the battery device is more flexibly installed in the limited space.

Inventors

  • 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 (100), characterized by comprising: A case (10); The battery cell assembly (20), battery cell assembly (20) set up in box (10), battery cell assembly (20) include a plurality of battery cells (301), a plurality of in battery cell assembly (20) battery cell (301) are along the range upon range of arrangement of second direction, and satisfy: S is the sum of the numbers of the battery cells (301) of the plurality of battery cell assemblies (20), W b is the inner width of the box body (10), t is the width of each battery cell (301), A is the length of each battery cell (301), W c is a set gap between the battery cell assemblies (20) and the side wall of the box body (10) in the width direction of the box body (10) when the second direction is the width direction of the box body (10), and W d is a set gap between the battery cell assemblies (20) and the side wall of the box body (10) in the width direction of the box body (10) when the second direction is the length direction of the box body (10).
  2. 2. The battery device (100) according to claim 1, wherein, A set gap W c which is required to be met in the width direction of the box body (10) between the battery monomer component (20) and the side wall of the box body (10) meets the conditions that W c is more than or equal to 10mm and less than or equal to 130mm; the set gap W d between the battery unit component (20) and the side wall of the box body (10) in the width direction of the box body (10) is required to be met, and the set gap W d is more than or equal to 10mm and less than or equal to 130mm.
  3. 3. The battery device (100) according to claim 1 or 2, wherein W c is greater than W d .
  4. 4. The battery device (100) according to claim 1, wherein the case (10) includes a top plate (13) and a bottom plate (11) spaced apart in a height direction of the case (10), a side of the battery cell (301) facing the top plate (13) is provided with a post, and a height Hi of the battery cell (301) in the height direction of the case (10) satisfies 110mm +.hi+.140mm, wherein the height Hi of the battery cell (301) is a distance between a surface of the post facing the top plate (13) to a surface of the bottom plate (11) facing the top plate (13).
  5. 5. The battery device (100) of claim 1, further comprising a heat exchange assembly (50), the heat exchange assembly (50) configured to exchange heat with the battery cell (301), the heat exchange assembly (50) comprising a first heat exchange portion and a second heat exchange portion, the first heat exchange portion being folded and extended and defining a U-shaped region, the second heat exchange portion being folded and disposed within the U-shaped region and being folded and connected to one end of the first heat exchange portion.
  6. 6. The battery device (100) according to any one of claims 1-5, further comprising a heat exchange assembly (50), the heat exchange assembly (50) being arranged for heat exchange with the battery cell assembly (20), the heat exchange assembly (50) being arranged on at least one side of the battery cell assembly (20) in the height direction (Z) of the housing (10), the heat exchange assembly (50) comprising at least one heat exchange unit (5), the heat exchange unit (5) having a heat exchange flow channel portion (5 a), the heat exchange flow channel portion (5 a) having a heat exchange flow channel (51 a) therein for conducting a heat exchange medium, the heat exchange flow channel portion (5 a) comprising straight tube sections (51) extending in a straight line and curved tube sections (52) extending in an arc, the curved tube sections (52) connecting adjacent two of the straight tube sections (51) in the direction of extension of the heat exchange unit (5), the ratio of the bending radius R of the curved tube sections (52) to the width W of the heat exchange flow channel portion (5 a) being greater than 0.5.
  7. 7. The battery device (100) according to claim 6, wherein the value of k ranges from 1.0 to 1.5.
  8. 8. The battery device (100) according to claim 6, wherein the plurality of straight tube sections (51) in the single heat exchange flow path portion (5 a) includes a plurality of first straight tube sections (511) arranged at intervals in the first direction in sequence, each of the first straight tube sections (511) extends in the second direction, the plurality of bent tube sections (52) in the single heat exchange flow path portion (5 a) includes a first bent tube section (521), the first bent tube sections (521) are connected between the same ends of two adjacent first straight tube sections (511) in the second direction, and orthographic projections of the first straight tube sections (511) and the first bent tube sections (521) in the third direction are located within orthographic projections of the battery cell assembly (20) in the third direction, and the third direction, the second direction, and the first direction intersect each other.
  9. 9. The battery device (100) of claim 8, wherein the first straight tube section (511) has an extension length L of greater than or equal to 50mm.
  10. 10. The battery device (100) according to claim 8, wherein a distance d1 between two adjacent first straight tube sections (511) in the same heat exchange unit (5) in the first direction is larger than a width W of the first straight tube sections (511).
  11. 11. The battery device (100) according to claim 10, wherein a ratio of a spacing d1 of two adjacent first straight tube sections (511) in the first direction in the same heat exchange flow path portion (5 a) to a width W of the first straight tube sections (511) is smaller than 2.
  12. 12. The battery device (100) according to claim 8, wherein a ratio of an extension length of the first straight pipe section (511) to an extension length of the first curved pipe section (521) is 0.7 to 2.
  13. 13. The battery device (100) according to claim 8, wherein the first straight pipe section (511) and the first curved pipe section (521) in the single heat exchange flow path portion (5 a) constitute a bent main body (53), the plurality of heat exchange units (5), the bent main bodies (53) of the plurality of heat exchange units (5) being arranged in order along the first direction.
  14. 14. The battery device (100) according to claim 13, wherein a distance between two adjacent first straight tube sections (511) in the first direction in the same heat exchange flow path portion (5 a) is d1, and a distance between two adjacent first straight tube sections (511) in the first direction in two adjacent bent main bodies (53) is d2, and d2 is smaller than d1.
  15. 15. The battery device (100) according to claim 8, wherein the first straight tube section (511) and the first curved tube section (521) in a single heat exchange flow path portion (5 a) constitute a bent main body (53), wherein a plurality of the straight tube sections (51) in a single heat exchange flow path portion (5 a) include a second straight tube section (512), wherein the second straight tube section (512) in the same heat exchange flow path portion (5 a) is located on at least one side of the bent main body (53) in the second direction, and wherein the second straight tube section (512) extends in the first direction and is connected to the first straight tube section (511) in the same heat exchange flow path portion (5 a).
  16. 16. The battery device (100) according to claim 15, wherein a minimum distance d3 between the first curved pipe section (521) and the second straight pipe section (512) in the same heat exchange flow path portion (5 a) in the second direction is greater than or equal to 20mm.
  17. 17. The battery device (100) according to claim 15, wherein the first straight tube section (511) and the first curved tube section (521) in the single heat exchange flow path portion (5 a) constitute a bent main body (53), the number of the heat exchange units (5) is two, the bent main bodies (53) of the two heat exchange units (5) are arranged in the first direction, and the two heat exchange units (5) are a first heat exchange unit (51) and a second heat exchange unit (52), respectively; The first heat exchange unit (51) comprises a second straight pipe section (512), the second straight pipe section (512) of the first heat exchange unit (51) is located on one side of the bending main body (53) of the first heat exchange unit (51) along the second direction, the second heat exchange unit (52) comprises two second straight pipe sections (512), the two second straight pipe sections (512) of the second heat exchange unit (52) are located on two sides of the bending main body (53) of the second heat exchange unit (52) along the second direction, the bending main body (53) has a first side and a second side which are opposite in the second direction, one of the second straight pipe sections (512) of the first heat exchange unit (51) and one of the second straight pipe sections (512) of the second heat exchange unit (52) are located on the first side and along the first direction, and the other straight pipe section (53) of the second heat exchange unit (52) is arranged on the second side of the second straight pipe section (512) along the second direction and extends to the second side (53).
  18. 18. The battery device (100) according to claim 17, wherein a minimum distance d3 between the first bent pipe section (521) and the second straight pipe section (512) in the same heat exchange flow path portion (5 a) in the second direction is d4, and d4 is smaller than d3 between the second straight pipe section (512) located on the second side in the second heat exchange unit (52) and the first bent pipe section (521) in the first heat exchange unit (51) in the second direction.
  19. 19. The battery device (100) of claim 8, wherein the battery cell assembly (20) includes one or more battery cell rows (30) arranged along the first direction, each battery cell row (30) including a plurality of the battery cells (301) arranged along the second direction.
  20. 20. The battery device (100) according to claim 19, wherein at least one of the heat exchanging units (5) satisfies the relation w= (N x a-B)/(n+ (N x N-1) x (2 k-1)), N being the total number of the battery cell rows (30), the number of the first straight tube sections (511) corresponding to each of the battery cell rows (30) being the same and N, a being the dimension of a single battery cell row (30) in the first direction, the two sides of the bent body (53) in the first direction being a first side edge (531) and a second side edge (532), the two side edges of the battery cell row (30) exchanging heat with the same bent body (53) being a first side edge (31) and a second side edge (32), the bent body (53) being located between the first side edge (31) and the second side edge (32), the first side edge (531) being a distance between the first side edge (31) and the second side edge (32) in the first direction being a first side edge (531) and the second side edge (32) being a distance between the first side edge (32) and the second side edge (32B).

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 current technological development process, the performance optimization of the battery device is of great importance. The arrangement of the battery cells therein places higher demands. On the one hand, to increase the space utilization inside the tank, more energy is stored in a limited space. On the other hand, the compactness of a plurality of battery monomers is indispensable, and the compact arrangement can reduce the volume, adapts to more scenes. Disclosure of Invention The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present application is to provide a battery device that can reduce the occupation of the inside of the case body well, making the layout of the battery cell assembly more compact. The battery device according to the embodiment of the first aspect of the application comprises a box body and a battery unit component, wherein the battery unit component is arranged in the box body, the battery unit component comprises a plurality of battery units, and the plurality of battery units in the battery unit component are stacked along a second direction and meet the following conditions: S is the sum of the number of the battery cells of the plurality of battery cell assemblies, W b is the inner width of the box body, t is the width of each battery cell, A is the length of each battery cell, W c is a set gap which needs to be met in the width direction of the box body between the battery cell assemblies and the side wall of the box body when the second direction is the width direction of the box body, and W d is a set gap which needs to be met in the width direction of the box body between the battery cell assemblies and the side wall of the box body when the second direction is the length direction of the box body. According to the battery device, the plurality of battery cells are transversely arranged, so that the occupied area in the box body can be reduced well, the space in the width direction of the box body can be fully utilized, the longitudinal occupation of the box body is reduced, and the layout of the battery cell assembly is more compact. Therefore, the space utilization rate in the box body can be improved, more installation space is reserved for other components, and meanwhile, the battery device is more flexibly installed in the limited space. In some embodiments of the application, a set gap W c between the battery cell assembly and the side wall of the box body in the width direction of the box body is 10mm or less and is c or less and 130mm or less, and a set gap W d between the battery cell assembly and the side wall of the box body in the width direction of the box body is 10mm or less and is d or less and is 130mm or less. In the above example, by setting a range of the reasonable setting gap, a heat dissipation space can be provided for the battery cell, preventing overheating. Meanwhile, external impact can be buffered to a certain extent, and the battery monomer is protected. The proper clearance ensures the safe and stable operation of the battery device and prolongs the service life of the battery. In addition, the setting gap also provides an assembly space for other structural members, so that the overall layout and the installation of the battery device are convenient. In some embodiments of the application, W c is greater than W d. In the above example, the larger W c gap can provide a better heat dissipation path for the battery cell assembly in the width direction, reducing the risk of degradation of battery performance due to heat accumulation. Secondly, in the installation and maintenance process, the bigger clearance of W c makes things convenient for operating personnel to operate battery cell subassembly from box width direction, has improved work efficiency. Meanwhile, enough space is reserved for other structures such as possible wiring and the like. In some embodiments of the application, the box comprises a top plate and a bottom plate which are spaced along the height direction of the box, a pole is arranged on one side of the battery cell facing the top plate, the height Hi of the battery cell in the height direction of the box is 110mm less than or equal to Hi less than or equal to 140mm, and the height Hi of the battery cell is the distance between the surface of the pole facing the top plate and the surface of the bottom plate facing the top plate. In the above example, the shorter battery cell occupies a small space in the height direction of the case, which is advantageous in designing a short case. The short box body can reduce the whole gravity center of the equipment and improve the stability. Meanwhile, the method has advantages in some application