KR-20260067579-A - BATTERY PACK

Abstract

The technical concept of the present invention provides a battery pack comprising: a pack housing; a cell assembly including a frame provided on the pack housing and battery cells accommodated in the frame; a mounting block provided between the frame and the pack housing; and a first bolt that fastens the frame to the mounting block and is spaced apart from the pack housing, wherein the mounting block includes an insulating layer provided in a portion contacting the frame and a portion contacting the pack housing.

Inventors

• 박주훈
• 최범석

Assignees

• 주식회사 엘지에너지솔루션

Dates

Publication Date

20260513

Application Date

20241106

Claims (12)

1. Pack housing; A cell assembly comprising a frame provided on the pack housing and battery cells accommodated in the frame; A mounting block provided between the above frame and the above pack housing; and A first bolt spaced apart from the pack housing, which fastens the above frame to the above mounting block; Includes, A battery pack comprising an insulating layer provided on a portion of the mounting block in contact with the frame and a portion in contact with the pack housing.
2. In Article 1, The above mounting block further includes a core block, and A battery pack characterized in that the insulating layer extends along the outer surface of the core block.
3. In Article 2, A battery pack characterized in that the first bolt is fastened to the core block.
4. In Article 1, A battery pack characterized in that the insulating layer is configured to electrically insulate the pack housing from the frame and the first bolt.
5. In Article 1, A battery pack characterized by further including a second bolt for fastening the mounting block to the pack housing.
6. In Article 5, The above mounting block further includes a core block that is fastened to the first bolt, and A battery pack characterized in that the second bolt is spaced apart from the core block with the insulating layer in between.
7. In Article 5, The above mounting block further includes a core block that is fastened to the first bolt, and The above insulating layer is, An outer insulating layer extending along the outer surface of the core block and in contact with the frame and the pack housing; and An internal insulating layer extending along the hole of the core block into which the second bolt is inserted; A battery pack characterized by including
8. In Article 7, A battery pack characterized in that the insulating layer is configured to electrically insulate the second bolt from the core block and the first bolt.
9. In Article 1, The above mounting block includes a hollow portion, and A battery pack characterized in that the end of the first bolt is received in the hollow portion of the mounting block.
10. In Article 9, A nut coupled to the end of the first bolt accommodated in the hollow portion of the mounting block; A battery pack characterized by further including
11. In Article 9, It further includes a second bolt for fastening the above mounting block to the above pack housing, and A battery pack characterized in that a portion of the second bolt is received in the hollow portion of the mounting block.
12. In Article 1, The above mounting block includes a hollow portion that accommodates the end of the first bolt, and A nut coupled to the end of the first bolt received in the hollow portion of the mounting block; and A second bolt that fastens the above mounting block to the above pack housing, with a portion thereof received in the above hollow portion of the above mounting block; A battery pack characterized by further including

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. As rechargeable batteries are increasingly used in mobility, demands for their safety are rising. Given that accidents such as fires involving rechargeable batteries in mobility applications can endanger the lives of drivers, research into technologies to enhance battery safety is indispensable. FIG. 1 is a plan view showing a battery pack according to exemplary embodiments. FIG. 2 is a perspective view showing a cell assembly provided in a battery pack according to exemplary embodiments mounted in a pack housing. FIG. 3 is a side view showing a cell assembly provided in a battery pack according to exemplary embodiments mounted in a pack housing. FIG. 4 is a cross-sectional view showing a cell assembly provided in a battery pack according to exemplary embodiments mounted in a pack housing. FIG. 5 is a cross-sectional view showing a cell assembly provided in a battery pack according to exemplary embodiments mounted in a pack housing. FIG. 6 is a cross-sectional view showing a cell assembly provided in a battery pack according to exemplary embodiments mounted in a pack housing. 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 embodiment) FIG. 1 is a plan view showing a battery pack (10) according to exemplary embodiments. FIG. 2 is a perspective view showing a cell assembly (100) provided in a battery pack (10) according to exemplary embodiments mounted in a pack housing (310). FIG. 3 is a side view showing a cell assembly (100) provided in a battery pack (10) according to exemplary embodiments mounted in a pack housing (310). FIG. 4 is a cross-sectional view showing a cell assembly (100) provided in a battery pack (10) according to exemplary embodiments mounted in a pack housing (310). Referring to FIGS. 1 to 4, the battery pack (10) may include a cell assembly (100), a pack housing (310), a mounting block (210), and a first bolt (230). A cell assembly (100) can be mounted in a pack housing (310). A plurality of cell assemblies (100) may be provided in the pack housing (310), and the plurality of cell assemblies (100) may be arranged in a first horizontal direction (e.g., X-axis direction) and a second horizontal direction (e.g., Y-axis direction). The cell assembly (100) may include a cell block (110) comprising a plurality of battery cells (111) and a frame (120). An individual battery cell (111) is a basic unit of a lithium-ion battery, i.e., a secondary battery. An individual battery cell (111) may include an electrode assembly, an electrolyte, and a cell case. The electrode assembly embedded in the cell case may include a positive electrode, a negative electrode, and a separator interposed between the positive and negative electrodes. Depending on the assembly form, the electrode assembly may be either a jelly-roll type or a stack type. A jelly-roll type electrode assembly may include a wound structure of a positive ele