KR-20260063428-A - BATTERY PACK

Abstract

According to exemplary embodiments, a battery pack is provided. The battery pack comprises: a pack housing including a base plate and a heat pocket which is an empty space below the base plate; and a plurality of battery cells arranged in a first direction, and may include a battery cell assembly on the upper surface of the base plate.

Inventors

• 이정훈
• 정혜미

Assignees

• 주식회사 엘지에너지솔루션

Dates

Publication Date

20260507

Application Date

20241030

Claims (15)

1. Pack housing including a base plate and a heat pocket, which is an empty space below the base plate; and A battery pack comprising a plurality of battery cells arranged in a first direction and a battery cell assembly on the upper surface of the base plate.
2. In paragraph 1, The above pack housing further includes a center beam that protrudes from the upper surface of the base plate and extends in the first direction, and The above center beam includes a side wall, and A battery pack characterized in that the side wall of the center beam faces the battery cell assembly and includes an upper opening.
3. In paragraph 2, A battery pack characterized in that the upper opening of the center beam is connected to the heat pocket.
4. In paragraph 2, The center beam further includes a heat channel that extends vertically within the center beam and is connected to the heat pocket. A battery pack characterized in that the upper opening of the center beam is connected to the heat channel of the center beam.
5. In paragraph 4, The center beam further includes a partition wall spaced apart from the side wall and in a second direction perpendicular to the first direction, and A battery pack characterized in that the heat channel of the center beam is the space between the inner surface of the side wall and the side of the bulkhead facing the inner surface of the side wall.
6. In paragraph 5, The center beam includes a first backflow prevention structure within the heat channel, and The first backflow prevention structure of the center beam is, A first portion coupled to the inner surface of the above side wall; and A battery pack characterized by including a second part connected to the first part and perpendicular to the first part.
7. In paragraph 6, The above center beam further includes a second backflow prevention structure, and The above-mentioned second backflow prevention structure is, A first part coupled to the side of the bulkhead facing the inner surface of the sidewall; and A battery pack characterized by including a second part connected to the first part and perpendicular to the first part.
8. In Paragraph 7, A battery pack characterized by the above center beam further including a lower opening located below the upper opening in a vertical direction.
9. In paragraph 8, A battery pack characterized in that each of the first and second backflow prevention structures of the center beam is disposed between the lower opening and the heat pocket.
10. In Paragraph 7, A battery pack characterized in that the second part of the first backflow prevention structure of the center beam and the second part of the second backflow prevention structure of the center beam are spaced apart in the second direction.
11. In Paragraph 7, The first backflow prevention structure is located vertically below the second backflow prevention structure, and A battery pack characterized in that the first part of the first backflow prevention structure of the center beam and the second part of the second backflow prevention structure of the center beam are spaced apart in the vertical direction.
12. In paragraph 1, The above pack housing further includes a cross beam on the upper surface of the base plate, and The above cross beam extends in a second direction parallel to the upper surface of the base plate and perpendicular to the first direction, and The above cross beam includes a side wall, and A battery pack characterized in that the side wall of the cross beam faces the battery cell assembly and includes an upper opening.
13. In Paragraph 12, A battery pack characterized in that the side wall of the cross beam further includes a lower opening located below the upper opening in the vertical direction.
14. In Paragraph 13, A battery pack characterized in that the upper opening and the lower opening of the cross beam are each connected to the heat pocket.
15. In Paragraph 14, The cross beam includes a heat channel that extends vertically within the cross beam and is connected to the heat pocket. A battery pack characterized in that the upper opening of the cross beam is connected to the heat channel of the cross beam.

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. In the current trend emphasizing secondary batteries for mobility, the primary direction of secondary battery technology development is to reduce production costs and enhance safety. Secondary batteries account for the largest share of a BEV's manufacturing cost. Therefore, the production cost of secondary batteries is the most critical factor in increasing the market share of BEVs compared to internal combustion engine vehicles. Cost reduction can be achieved through the reduction of raw materials, the decrease in the number of steps in the production process, and the shortening of cycle times. The safety of secondary batteries is critical as it is directly linked to the lives of mobility passengers. A key challenge for enhancing secondary battery safety is the provision of cooling solutions for battery packs. FIG. 1 is a top view showing a battery pack according to exemplary embodiments. FIG. 2 is a bottom view showing a battery pack according to exemplary embodiments. FIG. 3 is a cross-sectional view showing a battery pack according to exemplary embodiments. FIG. 4 is an enlarged cross-sectional view showing a center beam according to exemplary embodiments. FIG. 5 is a perspective view showing a center beam according to exemplary embodiments. FIG. 6 is a cross-sectional view showing a battery pack according to exemplary embodiments. FIG. 7 is an enlarged cross-sectional view showing a cross beam according to exemplary embodiments. FIG. 8 is a cross-sectional view showing a battery pack according to exemplary embodiments. FIG. 9 is an enlarged cross-sectional view showing a center beam according to exemplary embodiments. 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 top view showing a battery pack (100) according to exemplary embodiments. FIG. 2 is a bottom view showing a battery pack (100) according to exemplary embodiments. FIG. 3 is a cross-sectional view showing a battery pack (100) according to exemplary embodiments. FIG. 3 is a cross-sectional view along A-A' of FIG. 1 and FIG. 2. FIG. 4 is an enlarged cross-sectional view of a center beam (112) according to exemplary embodiments. FIG. 4 shows an enlarged view of the P1 portion of FIG. 3. FIG. 5 is a perspective view of a center beam (112) according to exemplary embodiments. FIG. 6 is a cross-sectional view showing a battery pack (100) according to exemplary embodiments. FIG. 6 is a cross-sectional view along B-B' of FIG. 1 and FIG. 2. FIG. 7 is an enlarged cross-sectional view of one of the cross beams (113) according to exemplary embodiments. FIG. 7 shows an enlarged view of the P2 portion of FIG. 6. Referring to FIGS. 1 through 7, the battery pack (100) may include a pack housing and battery cell assemblies (120_1, 120_2) mounted in the pack housing. The battery pack (100) may be the final form of a battery system mounted on a mobility