KR-20260066953-A - BATTERY PACK AND ELECTRICAL DEVICE INCLUDING THE SAME

KR20260066953AKR 20260066953 AKR20260066953 AKR 20260066953AKR-20260066953-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 in contact with the base frame and spaced apart from the cell block with a lower gap in between; an upper cover in contact with the top frame and spaced apart from the cell block with an upper gap in between; a first side cover connected to a first side of the cell block and coupled to the lower cover and the upper cover; and a second side cover connected to a second side of the cell block opposite to the first side of the cell block and coupled to the lower cover and the upper cover.

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 in contact with the base frame and spaced apart from the cell block with a lower gap in between; An upper cover in contact with the top frame and spaced apart from the cell block with an upper gap in between; 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, and coupled to the lower cover and the upper cover; A battery pack including
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 by further including a lower compressible pad disposed between the lower cover and the cell block.
In Article 1, 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 a first direction between the first side cover and the second side cover.
In Article 1, The above cell assembly is, A third side cover covering the third side of the cell block; and A fourth side cover covering the fourth side of the cell block opposite to the third side of the cell block; A battery pack characterized by further including
In Article 8, A battery pack characterized in that the third side cover and the fourth side cover each include a through hole.
In Article 1, The above housing is configured to accommodate an insulating cooling fluid in an internal space that accommodates the cell assembly, and A battery pack characterized in that the lower gap and the upper gap are provided as passages configured to allow the insulating cooling fluid to flow.
In Article 10, A battery pack characterized in that the housing includes an inlet port into which the insulating cooling fluid supplied from the outside flows and an outlet port for discharging the insulating cooling fluid to the outside.
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 upper cover includes a plurality of upper support bands spaced apart with an upper opening in between, and A battery pack characterized in that the lower cover includes a plurality of lower support bands spaced apart with a lower opening in between.
In Article 12, The lower compressible pad is disposed between at least one of the plurality of lower support bands and the cell block, and A battery pack characterized in that the upper compressible pad is disposed between at least one of the plurality of upper support bands and the cell block.
Battery pack according to claim 1; and A cooling fluid supply unit configured to supply an insulating cooling fluid into the internal space of the housing of the battery pack; An electrical device including
In Article 14, The plurality of battery cells are arranged in a first direction between the first side cover and the second side cover, and The above lower cover includes a plurality of lower support bands spaced apart from each other in a second direction perpendicular to a first direction, and The upper cover includes a plurality of upper support bands spaced apart from each other in the second direction, and An electrical device characterized in that the insulating cooling fluid is configured to flow through the lower gap provided between the lower cover and the cell block and the upper gap provided between the upper cover and the cell block.

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. FIG. 5 is a plan view schematically showing a battery pack according to exemplary embodiments. Figure 6 is a cross-sectional view of a battery pack along the line VI-VI' of Figure 5. Figure 7 is a cross-sectional view of a battery pack along the line Ⅶ-Ⅶ' of Figure 5. FIG. 8 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. Referring to FIGS. 1 to 4, 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), and busbar frames (171). 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 electrode, a negative electrode, and a separator interposed between them. A stack type electrode assembly may include a plurality of positive electrodes, a plurality of negative electrodes, and a plurality of separators interposed between them, which are stacked sequentially. The positive electrode may include a positive current collector and a positive active material. The negative electrode ma