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CN-122003754-A - Battery cell assembly and battery pack including the same

CN122003754ACN 122003754 ACN122003754 ACN 122003754ACN-122003754-A

Abstract

Embodiments provide a battery pack. The battery pack includes a battery pack case including a base plate including a first cooling passage, a battery cell assembly on the battery pack case, and a cover coupled to the side wall and including a second cooling passage, wherein the battery cell assembly includes a plurality of battery cells arranged in a first direction parallel to a mounting surface of the base plate and a plurality of heat dissipation fins between the plurality of battery cells, and each of the plurality of heat dissipation fins includes a contact part overlapping the plurality of battery cells in the first direction, a heat dissipation part connected to the contact part and facing the cover, and a protection part overlapping the contact part in the first direction.

Inventors

  • ZHANG JUNHAO

Assignees

  • 株式会社LG新能源

Dates

Publication Date
20260508
Application Date
20250423
Priority Date
20240429

Claims (13)

  1. 1. A battery pack, comprising: a battery pack housing comprising a base plate, wherein the base plate comprises a first cooling channel; A battery cell assembly located on the battery pack case, and A cover coupled to the sidewall and including a second cooling passage, Wherein the battery cell assembly includes a plurality of battery cells arranged in a first direction parallel to a mounting surface of the base plate and a plurality of heat sinks located between the plurality of battery cells, and Each of the plurality of heat dissipation fins includes a contact portion overlapping the plurality of battery cells in the first direction, a heat dissipation portion connected to the contact portion and facing the cover, and a protection portion overlapping the contact portion in the first direction.
  2. 2. The battery pack of claim 1, wherein the contact portion of each of the plurality of fins comprises a hollow portion.
  3. 3. The battery pack of claim 2, wherein the cell assembly further comprises a plurality of pads located between the plurality of cells.
  4. 4. The battery pack of claim 3, wherein the plurality of pads are located in the hollow of a corresponding one of the plurality of heat sinks.
  5. 5. The battery pack of claim 3, wherein a thickness of each of the plurality of pads is the same as a thickness of the contact portion of each of the plurality of fins.
  6. 6. The battery pack according to claim 2, wherein the protecting portion covers the hollow portion.
  7. 7. The battery pack of claim 2, wherein each of the plurality of fins further comprises a burr surrounding the hollow portion of the contact portion.
  8. 8. The battery pack according to claim 7, wherein the protection portion faces the burr.
  9. 9. The battery pack according to claim 2, wherein the protection portion is spaced apart from the heat dissipation portion, and the contact portion is interposed between the protection portion and the heat dissipation portion.
  10. 10. The battery pack according to claim 2, wherein the protection portion overlaps the heat dissipation portion in a third direction perpendicular to the mounting surface of the base plate.
  11. 11. The battery pack of claim 1, wherein the plurality of cells and the plurality of fins alternate in the first direction.
  12. 12. The battery pack according to claim 1, wherein the contact portion of each of the plurality of heat dissipation fins is in contact with one of the plurality of battery cells, and the protection portion of each of the plurality of heat dissipation fins is in contact with another of the plurality of battery cells.
  13. 13. The battery pack of claim 1, wherein the first surface of each of the plurality of battery cells is in contact with the contact portion of a corresponding one of the plurality of heat sinks, and A second surface of each of the plurality of battery cells is in contact with the protection portion of the corresponding one of the plurality of heat sinks, the second surface being opposite to the first surface.

Description

Battery cell assembly and battery pack including the same Technical Field The present disclosure relates to a battery cell assembly and a battery pack including the same. The present application claims the benefit of priority based on korean patent application No. 10-2024-0056444 filed on 29 th year 2024 and korean patent application No. 10-2024-0071873 filed on 31 th year 2024, and the entire contents of the foregoing korean patent applications are incorporated herein by reference. Background Unlike the primary battery, the secondary battery may be repeatedly charged and discharged. Secondary batteries are widely used as energy sources for various types of wireless devices such as cellular phones, notebook computers, and wireless cleaners. Recently, the main use of secondary batteries has been shifted from mobile devices to vehicles (mobility) because the manufacturing cost per unit capacity of the secondary batteries has been significantly reduced due to the increase in energy density and economies of scale, and the range of a pure electric vehicle (BEV) has increased to the same level as that of a fuel vehicle. With the current emphasis on the trend for secondary batteries for vehicles, the development of secondary battery technology is mainly aimed at reducing production costs and improving safety. Secondary batteries account for the largest part of the manufacturing costs of BEVs. Therefore, the most important factor for increasing BEV share as compared to internal combustion vehicles is the production cost of the secondary battery. The production cost can be reduced by reducing the raw materials, reducing the number of steps in the production process, and reducing tact time. The safety of the secondary battery is directly related to the life of the vehicle occupant, and thus is very important. A key task to enhance the safety of secondary batteries is to provide a cooling solution for the battery pack. Disclosure of Invention Technical problem The present disclosure relates to providing a battery cell assembly having improved cooling efficiency and a battery pack including the same. Technical proposal Embodiments of the present disclosure provide a battery pack. The battery pack includes a battery pack case including a base plate including a first cooling passage, a battery cell assembly on the battery pack case, and a cover coupled to the side wall and including a second cooling passage, wherein the battery cell assembly includes a plurality of battery cells arranged in a first direction parallel to a mounting surface of the base plate and a plurality of heat dissipation fins between the plurality of battery cells, and each of the plurality of heat dissipation fins includes a contact part overlapping the plurality of battery cells in the first direction, a heat dissipation part connected to the contact part and facing the cover, and a protection part overlapping the contact part in the first direction. The contact portion of each of the plurality of heat sinks may include a hollow portion. The battery cell assembly may also include a plurality of pads positioned between the plurality of battery cells. The plurality of pads may be located in the hollow portion of a corresponding one of the plurality of fins. The thickness of each of the plurality of pads may be the same as the thickness of the contact portion of each of the plurality of heat sinks. The protection portion may cover the hollow portion. Each of the plurality of fins may further include a burr surrounding the hollow portion of the contact portion. The protection portion may face the burr. The protection portion may be spaced apart from the heat dissipation portion with the contact portion interposed therebetween. The protection portion may overlap the heat dissipation portion in a third direction perpendicular to the mounting surface of the base plate. The plurality of battery cells and the plurality of heat sinks may alternate in a first direction. The contact portion of each of the plurality of heat dissipation fins may be in contact with one of the plurality of battery cells, and the protection portion of each of the plurality of heat dissipation fins may be in contact with another of the plurality of battery cells. The first surface of each of the plurality of battery cells may be in contact with the contact portion of a corresponding one of the plurality of heat sinks, and the second surface of each of the plurality of battery cells may be in contact with the protection portion of a corresponding one of the plurality of heat sinks, the second surface being opposite to the first surface. Advantageous effects According to the embodiments of the present disclosure, heat emitted from a plurality of battery cells may be transferred to the cooling channels of the cover through a plurality of heat dissipation fins, thereby improving the cooling efficiency of the battery pack. Effects that may be achieved by the embodiments of the present di