KR-20260066931-A - BATTERY PACK AND ELECTRICAL DEVICE INCLUDING THE SAME

KR20260066931AKR 20260066931 AKR20260066931 AKR 20260066931AKR-20260066931-A

Abstract

The technical concept of the present invention provides a battery pack comprising: a housing including a base frame and a top frame; and a cell assembly disposed between the base frame and the top frame; wherein the cell assembly comprises: a cell block including a plurality of battery cells; a lower cover disposed between the cell block and the base frame; an upper cover disposed between the cell block and the top frame; a first side cover connected to a first side of the cell block and coupled to the lower cover and the upper cover; a second side cover connected to a second side of the cell block opposite to the first side of the cell block in a first direction and coupled to the lower cover and the upper cover; a third side cover facing a third side of the cell block and having a first through hole; a fourth side cover facing a fourth side of the cell block opposite to the third side of the cell block in a second direction and having a second through hole; and a cooling structure in contact with at least one of the plurality of battery cells and comprising a flow path extending in the second direction and configured to allow an insulating cooling fluid to flow.

Inventors

정수진
최종화
김민범
임채원
함현준

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260512
Application Date: 20241105

Claims (15)

Housing including a base frame and a top frame; and A cell assembly disposed between the base frame and the top frame; Includes, The above cell assembly is, A cell block comprising a plurality of battery cells; A lower cover disposed between the cell block and the base frame; An upper cover disposed between the cell block and the top frame; A first side cover connected to the first side of the cell block and coupled to the lower cover and the upper cover; and A second side cover connected to the second side of the cell block opposite to the first side of the cell block in the first direction, and coupled to the lower cover and the upper cover; A third side cover facing the third side of the cell block and having a first through hole; A fourth side cover having a second through hole facing the fourth side of the cell block opposite to the third side of the cell block in a second direction; and A cooling structure comprising a flow path that contacts at least one of the plurality of battery cells and extends in the second direction and is configured to allow an insulating cooling fluid to flow; A battery pack including
In Article 1, A battery pack characterized in that the above-mentioned flow path of the cooling structure penetrates the cooling structure in the second direction.
In Article 1, The above lower cover includes a plurality of lower support bands spaced apart with a lower opening in between, and A battery pack characterized in that the upper cover includes a plurality of upper support bands spaced apart with an upper opening in between.
In Article 1, A battery pack characterized in that the lower cover is spaced apart from the cell block with a lower gap in between.
In Paragraph 4, A battery pack characterized by further including a lower compressible pad disposed between the lower cover and the cell block.
In Article 1, A battery pack characterized in that the upper cover is spaced apart from the cell block with an upper gap in between.
In Article 6, A battery pack characterized by further including an upper compressible pad disposed between the upper cover and the cell block.
In Article 1, A battery pack characterized by further including a lower adhesive layer configured to attach the lower cover to the base frame.
In Article 1, A battery pack characterized by further including an upper adhesive layer configured to attach the upper cover to the top frame.
In Article 1, A battery pack characterized in that the plurality of battery cells are arranged in the first direction between the first side cover and the second side cover.
In Article 1, A battery pack characterized in that the housing is configured to accommodate the insulating cooling fluid in an internal space that accommodates the cell assembly.
In Article 11, The lower cover is spaced apart from the cell block with a lower gap in between, and The upper cover is spaced apart from the cell block with an upper gap in between, and A battery pack characterized in that the lower gap, the upper gap, and the fluid passage of the cooling structure are provided as passages configured to allow the insulating cooling fluid to flow.
In Article 1, The above cooling structure is, A lower protrusion disposed between the cell block and the lower cover and configured to support the lower cover so as to form a lower gap between the cell block and the lower cover; and An upper protrusion disposed between the cell block and the upper cover, configured to support the upper cover so as to form an upper gap between the cell block and the upper cover; Includes, The above housing is configured to accommodate the insulating cooling fluid in an internal space that accommodates the cell assembly, and A battery pack characterized in that the lower gap, the upper gap, and the fluid passage of the cooling structure are provided as passages configured to allow the insulating cooling fluid to flow.
In Article 1, A lower compressible pad disposed between the lower cover and the cell block; An upper compressible pad disposed between the upper cover and the cell block; A lower adhesive layer configured to attach the lower cover to the base frame; and An upper adhesive layer configured to attach the upper cover to the top frame; Includes more, The above lower cover includes a plurality of lower support bands spaced apart with a lower opening in between, and The above upper cover includes a plurality of upper support bands spaced apart with an upper opening in between, and The above housing is configured to accommodate the insulating cooling fluid in an internal space that accommodates the cell assembly, and The lower cover is spaced apart from the cell block with a lower gap in between, and The upper cover is spaced apart from the cell block with an upper gap in between, and A battery pack characterized in that the lower gap, the upper gap, and the fluid passage of the cooling structure are provided as passages configured to allow the insulating cooling fluid to flow.
Battery pack according to claim 1; and A cooling fluid supply unit configured to supply the insulating cooling fluid into the internal space of the housing of the battery pack; An electrical device including

Description

Battery pack and electric device including the same The present invention relates to a battery pack and an electrical device 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. 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 perspective view showing a cell assembly according to exemplary embodiments. Figure 2 is a perspective view showing a part of the cell assembly of Figure 1. Figure 3 is a cross-sectional view of a cell assembly along the line III-III' of Figure 1. Figure 4 is a cross-sectional view of a cell assembly along the line IV-IV' of Figure 1. Figure 5 is a cross-sectional view of a cell assembly along the V-V' line of Figure 1. FIG. 6 is a cross-sectional view showing a cell assembly according to exemplary embodiments. FIG. 7 is a cross-sectional view showing a cell assembly according to exemplary embodiments. FIG. 8 is a plan view schematically showing a battery pack according to exemplary embodiments. Figure 9 is a cross-sectional view of a battery pack along the line IX-IX' of Figure 8. Figure 10 is a cross-sectional view of a battery pack along the line X-X' of Figure 8. FIG. 11 is a plan view schematically showing an electrical device 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 perspective view showing a cell assembly (10) according to exemplary embodiments. FIG. 2 is a perspective view showing a part of the cell assembly (10) of FIG. 1. FIG. 3 is a cross-sectional view of the cell assembly (10) along the line III-III' of FIG. 1. FIG. 4 is a cross-sectional view of the cell assembly (10) along the line IV-IV' of FIG. 1. FIG. 5 is a cross-sectional view of the cell assembly (10) along the line V-V' of FIG. 1. Referring to FIGS. 1 to 5, the cell assembly (10) may include a cell block (110), a lower cover (120), an upper cover (130), a first side cover (141), a second side cover (145), a third side cover (151), a fourth side cover (155), a lower compressible pad (161), an upper compressible pad (165), busbar frames (171), and a cooling structure (180). The cell block (110) may include a plurality of battery cells (111). 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 electr