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CN-122000536-A - Battery module, battery pack and electricity utilization device

CN122000536ACN 122000536 ACN122000536 ACN 122000536ACN-122000536-A

Abstract

The invention discloses a battery module, a battery pack and an electricity utilization device, wherein the battery module comprises a plurality of battery components, the battery components are distributed along a first direction, each battery component comprises a plurality of cylindrical battery packs distributed along a second direction, each cylindrical battery pack comprises a plurality of cylindrical batteries distributed along a third direction, the axes of the cylindrical batteries extend along the first direction, cold plates are arranged between any two adjacent cylindrical battery packs along the second direction, and the plurality of cold plates of the battery components are spaced and connected in series. According to the battery module, the production cost is reduced. Meanwhile, the whole cooling system is simpler in structure, easy to realize efficient layout in a limited space, convenient to maintain and easy to locate and repair possible fault points.

Inventors

  • ZHAO YUHANG
  • FENG YANQIANG
  • SHI LIN
  • LI HELIN

Assignees

  • 惠州亿纬锂能股份有限公司

Dates

Publication Date
20260508
Application Date
20260127

Claims (15)

  1. 1. A battery module, comprising: The battery pack comprises a plurality of battery packs (10), wherein the battery packs (10) are arranged along a first direction, each battery pack (10) comprises a plurality of cylindrical battery packs arranged along a second direction, each cylindrical battery pack comprises a plurality of cylindrical batteries (11) arranged along a third direction, the axes of the cylindrical batteries (11) extend along the first direction, a cold plate (3) is arranged between any two adjacent cylindrical battery packs along the second direction, and the plurality of cold plates (3) of the battery packs (10) are spaced and connected in series, wherein the first direction, the second direction and the third direction are perpendicular to each other.
  2. 2. The battery module according to claim 1, wherein both ends of each of the cold plates (3) in the third direction are provided with connection assemblies (5), the connection assemblies (5) comprising: A current collector (51), the current collector (51) being connected to the cold plate (3) and having a current collecting channel communicating with the cold plate (3); The buckling plate (52), buckling plate (52) and collector (51) are along the range upon range of setting and connection of second direction, buckling plate (52) last have with current collecting channel intercommunication's first mounting hole (521), connect the pipeline of cold plate (3) with buckling plate (52) are connected and with first mounting hole (521) intercommunication.
  3. 3. The battery module according to claim 2, wherein a side of the current collector (51) facing the crimping plate (52) has a second mounting hole (512) communicating with the current collecting channel, the crimping plate (52) has a mounting post (522) fitted with the second mounting hole (512), and the first mounting hole (521) penetrates the mounting post (522).
  4. 4. The battery module according to claim 3, wherein a seal ring (53) is provided between the mounting post (522) and the inner peripheral wall of the second mounting hole (512).
  5. 5. The battery module according to claim 2, wherein the crimping plate (52) is connected with the current collector (51) by a fastener (54).
  6. 6. The battery module according to claim 1, wherein two cylindrical battery packs adjacent in the second direction are defined as a first cylindrical battery pack (1) and a second cylindrical battery pack (2), respectively, and in the same battery pack (10), a plurality of the cylindrical batteries (11) of the first cylindrical battery pack (1) and a plurality of the cylindrical batteries (11) of the second cylindrical battery pack (2) are alternately arranged in the third direction, The cold plate (3) comprises a plurality of first protruding portions (31) and a plurality of second protruding portions (32), the first protruding portions (31) and the second protruding portions (32) are alternately arranged and connected along the third direction, the first protruding portions (31) and the cylindrical batteries (11) of the first cylindrical battery pack (1) are oppositely arranged along the second direction and protrude towards the direction of the second cylindrical battery pack (2), and the second protruding portions (32) and the cylindrical batteries (11) of the second cylindrical battery pack (2) are oppositely arranged along the second direction and protrude towards the direction of the first cylindrical battery pack (1).
  7. 7. The battery module according to claim 6, wherein the second direction is an up-down direction, the second cylindrical battery pack (2) is located at a lower side of the first cylindrical battery pack (1), and a heating film (6) is provided at a side of the cold plate (3) facing the second cylindrical battery pack (2).
  8. 8. The battery module according to claim 7, wherein the heating power at both ends of the heating film (6) is higher than the heating power at the middle region of the heating film (6) in the third direction.
  9. 9. The battery module according to claim 8, wherein in the third direction, the heating power of the area of the heating film (6) opposite to the four cylindrical batteries (11) on the outermost sides of the first cylindrical battery pack (1) and the second cylindrical battery pack (2) is Z, the heating power of the remaining area is X, and it is satisfied that 1.4 x≤z≤1.6X.
  10. 10. The battery module according to claim 7, wherein among the two adjacent first convex portions (31) and the second convex portions (32), the heating power of the heating film (6) in the region opposite to the first convex portions (31) is a, the heating power of the heating film (6) in the region opposite to the second convex portions (32) is B, and 1.1 b≤a≤1.2B is satisfied.
  11. 11. The battery module according to any one of claims 1 to 10, wherein a plurality of flow channels (33) are provided in the cold plate (3) at intervals along the first direction, and a dividing rib (34) is provided between two adjacent flow channels (33).
  12. 12. The battery module according to claim 11, wherein the thickness of the cold plate (3) is a in the second direction, and satisfies that a is 2 mm≤a≤5 mm; and/or, along the first direction, the size of the flow channel (33) is b, and along the second direction, the thickness of the cold plate (3) is a, and a/3-b-a/2 is satisfied; and/or, along the first direction, the size of the flow channel (33) is b, the size of the dividing rib (34) is c, and the ratio of 2b/3 c to b is more than or equal to 2; and/or, along the second direction, the wall thickness of the flow channel (33) is d, and a/4-d-a/2 is satisfied.
  13. 13. The battery module according to any one of claims 1 to 10, wherein in the same battery assembly (10), the number of cylindrical battery packs is two, and the number of cold plates (3) is one.
  14. 14. A battery pack, comprising: A case (200); The battery module (100) according to any one of claims 1-13, the battery module (100) being located within the case (200).
  15. 15. An electrical device comprising the battery pack of claim 14.

Description

Battery module, battery pack and electricity utilization device Technical Field The present invention relates to the field of battery technologies, and in particular, to a battery module, a battery pack, and an electric device. Background In the related art, the battery type comprises a cylindrical battery, a square battery and a soft package battery, wherein the cylindrical battery has higher energy density, better safety and stability and lower cost, is widely popularized and used on electric vehicles, is expected to become the future development trend of the electric vehicle battery, and has higher cooling cost. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a battery module which is low in cost and simple in structure. The invention further provides a battery pack, which comprises the battery module. The invention also provides an electric device which comprises the battery pack. According to the battery module, the battery module comprises a plurality of battery assemblies, the battery assemblies are arranged along a first direction, each battery assembly comprises a plurality of cylindrical battery packs arranged along a second direction, each cylindrical battery pack comprises a plurality of cylindrical batteries arranged along a third direction, the axes of the cylindrical batteries extend along the first direction, cold plates are arranged between any two adjacent cylindrical battery packs along the second direction, and the plurality of cold plates of the battery assemblies are spaced and connected in series, wherein the first direction, the second direction and the third direction are perpendicular to each other. According to the battery module provided by the embodiment of the invention, the independent cold plate is arranged in each battery assembly, and the plurality of cold plates of the plurality of battery assemblies are connected in series, so that the cold plate area between two adjacent battery assemblies can be reduced, and the cold plate cost of the battery module can be reduced. In addition, complicated split-flow and combined-flow designs can be reduced, materials and processes required in the manufacturing process are simplified, and the production cost is reduced. Meanwhile, the whole cooling system is simpler in structure, easy to realize efficient layout in a limited space, convenient to maintain and easy to locate and repair possible fault points. According to some embodiments of the invention, two ends of each cold plate along the third direction are provided with connecting components, each connecting component comprises a current collector, a buckling plate and a buckling plate, wherein the current collector is connected with the cold plate and is provided with a current collecting channel communicated with the cold plate, the buckling plate and the current collector are arranged in a stacked mode along the second direction and are connected, the buckling plate is provided with a first mounting hole communicated with the current collecting channel, and a pipeline connected with the cold plate is connected with the buckling plate and is communicated with the first mounting hole. In some embodiments of the present invention, a side of the current collector facing the buckling plate is provided with a second mounting hole communicated with the current collecting channel, the buckling plate is provided with a mounting column matched with the second mounting hole, and the first mounting hole penetrates through the mounting column. In some embodiments of the invention, a sealing ring is provided between the mounting post and the inner peripheral wall of the second mounting hole. In some embodiments of the invention, the crimping plates are connected to the current collector by fasteners. According to some embodiments of the present invention, two cylindrical battery packs adjacent in the second direction are defined as a first cylindrical battery pack and a second cylindrical battery pack, respectively, in the same battery pack, the plurality of cylindrical batteries of the first cylindrical battery pack and the plurality of cylindrical batteries of the second cylindrical battery pack are alternately arranged in the third direction, the cold plate includes a plurality of first protruding portions and a plurality of second protruding portions, which are alternately arranged in the third direction and connected, the first protruding portions being arranged opposite to the cylindrical batteries of the first cylindrical battery pack in the second direction and protruding toward the direction of the second cylindrical battery pack, and the second protruding portions being arranged opposite to the cylindrical batteries of the second cylindrical battery pack in the second direction and protruding toward the direction of the first cylindrical battery pack. In some embodiments of