KR-20260066855-A - BATTERY CELL ASSEMBLY AND BATTERY PACK COMPRISING THE SAME

Abstract

According to exemplary embodiments of the present invention, a battery cell assembly may be provided. The battery cell assembly comprises a plurality of battery cells including a first battery cell, a second battery cell, a third battery cell, and a fourth battery cell arranged in a first direction; a first cooling plate disposed between the first battery cell and the second battery cell and having a channel through which a cooling material flows; and a second cooling plate disposed between the third battery cell and the fourth battery cell, wherein the cooling material may flow while undergoing a phase change between a gaseous state and a liquid state.

Inventors

• 장준호
• 신주환
• 강달모

Assignees

• 주식회사 엘지에너지솔루션

Dates

Publication Date

20260512

Application Date

20241105

Claims (12)

1. A plurality of battery cells including a first battery cell, a second battery cell, a third battery cell, and a fourth battery cell arranged in a first direction; A first cooling plate disposed between the first battery cell and the second battery cell and including a channel through which a cooling material flows; and It includes a second cooling plate disposed between the third battery cell and the fourth battery cell, and A battery cell assembly characterized in that the above-mentioned cooling material flows while undergoing a phase change between a gaseous state and a liquid state.
2. In Article 1, A battery cell assembly characterized in that the second cooling plate does not include a channel through which the cooling material flows.
3. In Article 1, A battery cell assembly characterized in that the above-mentioned Euro includes one or more circulating Euros.
4. In Article 1, A case accommodating the plurality of battery cells; and It further includes a lower heat absorption layer disposed between the bottom portion of the above case and the plurality of battery cells, and A battery cell assembly characterized in that the first cooling plate and the second cooling plate are in contact with the lower heat absorption layer.
5. In Article 1, The first cooling plate above is, A body portion overlapping the first battery cell and the second battery cell in the first direction; and It includes a bend portion protruding in the first direction from the body portion toward the upper part of the first battery cell, and A battery cell assembly characterized in that the above-mentioned Euro forms a single circulation path in the body portion and the above-mentioned bend portion.
6. In Article 5, A case accommodating the plurality of battery cells; and On the plurality of battery cells, the upper heat absorption layer is further included, spaced apart from the bottom portion of the case with the plurality of battery cells and the first cooling plate in between. A battery cell assembly characterized in that the above-mentioned bending portion contacts the above-mentioned upper heat absorption layer.
7. In Article 1, A battery cell assembly characterized in that the above Euro is an engraved pattern.
8. In Article 1, Each of the first cooling plate and the second cooling plate absorbs heat from an adjacent battery cell, and A battery cell assembly characterized in that the heat absorption amount per hour of the first cooling plate is different from the heat absorption amount per hour of the second cooling plate.
9. In Article 1, The first battery cell and the second battery cell are positioned in the central part among the plurality of battery cells, and A battery cell assembly characterized in that the third battery cell and the fourth battery cell are disposed in the periphery among the plurality of battery cells.
10. In Article 1, The first battery cell and the second battery cell are disposed in the periphery among the plurality of battery cells, and A battery cell assembly characterized in that the third battery cell and the fourth battery cell are disposed in the central portion among the plurality of battery cells.
11. A case capable of accommodating multiple battery cells internally; The plurality of battery cells, including a first battery cell and a second battery cell arranged in a first direction, disposed on the bottom portion of the above case; A lower heat absorption layer between the bottom portion and the plurality of battery cells; On the plurality of battery cells, an upper heat absorption layer spaced apart from the lower heat absorption layer and the first direction intersecting the plurality of battery cells in a second direction; and A cooling plate disposed between the first battery cell and the second battery cell and including a channel through which a cooling material flows, and The cooling plate comprises a body portion that overlaps the first battery cell and the second battery cell in the first direction, and a bend portion that overlaps the first battery cell in the second direction. The above body part is in contact with the lower heat absorption layer, and The above-mentioned bending portion is in contact with the upper heat absorption layer, and The above-mentioned Euro forms a single circulation path in the body portion and the bend portion, and A battery cell assembly characterized in that the above-mentioned cooling material flows while undergoing a phase change between a gaseous state and a liquid state.
12. In Article 11, A battery cell assembly characterized in that the cooling plate includes an L-shaped cross-section.

Description

Battery cell assembly and battery pack comprising the same The present invention relates to a battery cell assembly and a battery pack including the same. Specifically, the present invention relates to a battery cell assembly including a cooling plate and a battery pack including the same. 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 rechargeable batteries for mobility is the improvement of energy density and safety. The safety of rechargeable batteries is critical as it is directly linked to the lives of passengers. The safety of rechargeable 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 drawing showing a battery cell assembly according to exemplary embodiments based on the technical concept of the present invention. FIG. 2 is a cross-sectional view of a cooling plate for illustrating a battery cell assembly according to exemplary embodiments of the technical concept of the present invention. FIG. 3 is a cross-sectional view of a cooling plate to illustrate a battery cell assembly according to exemplary embodiments of the technical concept of the present invention. FIG. 4 is an exploded perspective view of a battery cell to illustrate a battery cell assembly according to exemplary embodiments of the technical concept of the present invention. FIG. 5 is a drawing showing a battery cell assembly according to exemplary embodiments based on the technical concept of the present invention. FIG. 6 is a drawing showing a battery cell assembly according to exemplary embodiments based on the technical concept of the present invention. FIG. 7 is a drawing showing a battery cell assembly according to exemplary embodiments based on the technical concept of the present invention. FIG. 8 is a drawing showing a battery cell assembly according to exemplary embodiments based on the technical concept of the present invention. FIG. 9 is a drawing showing a battery cell assembly according to exemplary embodiments based on the technical concept of the present invention. FIG. 10 is a drawing showing a battery cell assembly according to exemplary embodiments based on the technical concept of the present invention. FIG. 11 is a plan view of a battery pack according to exemplary embodiments of the technical concept of the present invention. 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 drawing showing a battery cell assembly (120A) according to exemplary embodiments of the technical concept of the present invention. FIG. 2 is a cross-sectional view of a first cooling plate (141) for illustrating a battery cell assembly (120A) according to exemplary embodiments of the technical concept of the present invention. Specifically, FIG. 2 is a cross-sectional view of a first cooling plate (141). FIG. 3 is a cross-sectional view of a first cooling plate (1