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KR-102961385-B1 - BATTERY PACK

KR102961385B1KR 102961385 B1KR102961385 B1KR 102961385B1KR-102961385-B1

Abstract

According to exemplary embodiments, a battery pack is provided. The battery pack comprises: a pack housing including a base plate; first and second battery cell assemblies disposed on the base plate; and blocks interposed between the first and second battery cell assemblies and the base plate, wherein the blocks overlap the outermost battery cells of the first and second battery cell assemblies.

Inventors

  • 신주환
  • 남진무
  • 김기영
  • 한년구

Assignees

  • 주식회사 엘지에너지솔루션

Dates

Publication Date
20260511
Application Date
20241023
Priority Date
20231106

Claims (19)

  1. Pack housing including a base plate; First and second battery cell assemblies disposed on the base plate; and Blocks interposed between the first and second battery cell assemblies and the base plate; and The battery assembly comprises TIM (Thermal Interface Material) layers interposed between the first and second battery cell assemblies and the base plate, wherein Each of the first and second battery cell assemblies comprises a pair of outermost battery cells, a plurality of intermediate battery cells interposed between the outermost battery cells, and insulation pads spaced apart from each other with the pair of outermost battery cells in between. The above blocks overlap with the outermost battery cells of the first and second battery cell assemblies, and A battery pack characterized in that the outermost battery cells are spaced apart from each of the TIM layers.
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  4. In paragraph 1, A battery pack characterized in that the above blocks are in contact with a corresponding one of the outermost battery cells of the first and second battery cell assemblies.
  5. In paragraph 1, A battery pack characterized in that the above TIM layers are in contact with the plurality of intermediate battery cells of the first and second battery cell assemblies.
  6. In paragraph 1, A battery pack characterized by the above blocks being horizontally surrounded by the TIM layers and in contact with the TIM layers.
  7. In paragraph 1, A battery pack characterized in that each of the above blocks has a thermal conductivity different from each of the above TIM layers.
  8. In paragraph 1, A battery pack characterized in that each of the above blocks has a lower thermal conductivity than each of the above TIM layers.
  9. Base plate; A battery cell assembly disposed on the above base plate; A block interposed between the base plate and the battery cell assembly; and It includes a TIM layer interposed between the base plate and the battery cell assembly, The battery cell assembly comprises outermost battery cells and a plurality of intermediate battery cells interposed between the outermost battery cells, and A battery pack characterized in that each of the outermost battery cells is spaced apart from the TIM layer.
  10. In Paragraph 9, A battery pack characterized in that the above block contacts the outermost battery cells of the above battery cell assembly.
  11. In Paragraph 9, A battery pack characterized in that the above TIM layer contacts the plurality of intermediate battery cells of the battery cell assembly.
  12. In Paragraph 9, A battery pack characterized by having a lower thermal conductivity than the TIM layer.
  13. In Paragraph 9, A battery pack characterized by the above block horizontally surrounding the TIM layer.
  14. In Paragraph 9, The outermost battery cells are spaced apart from each other in a first direction, and A battery pack characterized in that the outermost battery cells are spaced apart from the TIM layer in the first direction.
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Description

Battery Pack The present invention relates to a battery pack. Unlike primary batteries, secondary batteries can be charged and discharged multiple times. Secondary batteries are widely used as energy sources for various wireless devices such as handsets, laptops, and cordless vacuum cleaners. Recently, as the manufacturing cost per unit capacity of secondary batteries has decreased dramatically due to improved energy density and economies of scale, and as the driving range of BEVs (battery electric vehicles) has increased to a level equivalent to that of fuel vehicles, the primary use of secondary batteries is shifting from mobile devices to mobility. The trend in the technological development of secondary batteries for mobility is the improvement of energy density and safety. The safety of secondary batteries for mobility is critical as it is directly related to the lives of passengers. The safety of secondary batteries can be achieved through mechanical robustness, the reliability of electrical insulation, and the delay of heat transfer in the event of a thermal runaway event. FIG. 1 is a flowchart illustrating a method for manufacturing a battery pack according to exemplary embodiments. FIGS. 2 to 9 are drawings for illustrating a method of manufacturing a battery pack according to exemplary embodiments. FIGS. 10 to 12 are cross-sectional views illustrating battery packs according to other exemplary embodiments. FIG. 13 is a plan view illustrating a battery pack according to other exemplary embodiments. FIG. 14 is a cross-sectional view taken along the cutting line 13I-13I' of FIG. 13. FIG. 15 is a cross-sectional view taken along the cutting line 13II-13II' of FIG. 13. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe his invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application. In addition, in describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the invention, such detailed description is omitted. Since embodiments of the present invention are provided to more fully explain the invention to those skilled in the art, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or schematically depicted for clearer explanation. Accordingly, the size or proportion of each component does not entirely reflect the actual size or proportion. (1st and 2nd embodiments) FIG. 1 is a flowchart illustrating a method for manufacturing a battery pack according to exemplary embodiments. FIG. 2 is a perspective view illustrating a method for manufacturing a battery pack. Figure 3 is a plan view of Figure 2. Referring to FIGS. 1 to 3, a pack housing (110) may be provided in P110. The pack housing (110) may include a base plate (110B) and side walls (110S). Here, two directions substantially parallel to the mounting surface of the base plate (110B) are defined as the X direction and the Y direction, and a direction substantially perpendicular to the mounting surface of the base plate (110B) is defined as the Z direction. The X direction, the Y direction, and the Z direction may be substantially perpendicular to each other. The side walls (110S) may be adjacent to the edges of the base plate (110B). The side walls (110S) may be joined to the edges of the base plate (110B). Accordingly, the side walls (110S) may horizontally surround the mounting surface of the base plate (110B) on which the battery cell assemblies (120, see FIG. 5) are mounted. The base plate (110B) may include a center beam (110CB). The center beam (110CB) may be surrounded by side walls (110S). Accordingly, the center beam (110CB) may divide the space defined by the pack housing (110). Each of the base plate (110B) and the side walls (110S) may be provided by an extrusion process. The base plate (110B) may include a plurality of plates joined by friction stir welding. A center beam (110CB) may be included in any one of the plurality of plates of the base plate (110B) and formed by an extrusion process together with any one of the plurality of plates, or welded to any one of the plurality of plates of the base plate (110B). FIG. 4 is a persp