KR-20260067972-A - ENERGY STORAGE DEVICE

Abstract

The energy storage device comprises at least one energy storage cell, a bottom wall, a panel member provided below the bottom wall, and a protective member provided on the bottom wall. A safety valve is provided on the lower surface of the energy storage cell. The bottom wall has a through hole provided at a position opposite to the safety valve. The protective member includes an insulating member provided within the through hole. The insulating member includes a receiving surface located below the upper surface of the bottom wall.

Inventors

• 이와타 마코토
• 이시카와 쇼타로
• 후지와라 šœ스케
• 나카무라 소이치로
• 나카노 다카히코
• 스즈키 고스케
• 이시즈카 마사히로
• 마츠오 겐스케
• 구마자와 가즈야

Assignees

• 도요타지도샤가부시키가이샤

Dates

Publication Date

20260513

Application Date

20250813

Priority Date

20241106

Claims (4)

1. It is a capacitor, and At least one capacitor cell, and A bottom wall disposed below the above-mentioned at least one capacitor cell, and A panel member provided below the above-mentioned bottom wall and defining a smoke exhaust path together with the above-mentioned bottom wall, and A protective member provided on the above-mentioned bottom wall, and A safety valve is provided on the lower surface of at least one capacitor cell, and The above-mentioned bottom wall has a through hole provided at a position opposite to the safety valve, and The above protective member includes an insulating member provided within the through hole, and The above insulating member includes a receiving surface located below the upper surface of the bottom wall, Energy storage device.
2. In paragraph 1, The above protective member further includes a retaining support sheet that retains and supports the above insulating member, and A capacitor device comprising an adhesive portion attached to the receiving surface below the upper surface of the bottom wall, wherein the above-mentioned holding support sheet includes an adhesive portion attached to the receiving surface.
3. In paragraph 1, The above through hole is, A diameter reduction section that gradually decreases in diameter as it moves downward from the upper surface of the lower wall, and A storage device comprising a holding support member that extends downward from the lower end of the diameter reduction portion and holds and supports the insulation member.
4. In any one of paragraphs 1 through 3, A capacitor device further comprising a surrounding member having a shape that surrounds the through hole, provided between the at least one capacitor cell and the bottom wall.

Description

Energy Storage Device The present disclosure relates to a storage device. For example, Japanese Patent Publication No. 2024-501935 discloses an electric device comprising a plurality of battery cells, a first housing for housing the plurality of battery cells, a second housing for housing the first housing, and an isolation member provided within the second housing. The isolation member supports the first housing at a position above the bottom surface of the second housing. A collection cavity is formed below the isolation member within the second housing. A third vulnerable area is provided on the bottom surface of each battery cell, a pressure release area is provided on the bottom surface of the first housing, and a second vulnerable area is provided in the isolation member. The discharge discharged from the battery cell through the third vulnerable area of the battery cell flows into the collection cavity formed below the isolation member through the pressure release area and the second vulnerable area. The features, advantages, and technical and industrial significance of exemplary embodiments of the present invention are described below with reference to the accompanying drawings, in which similar reference numerals indicate similar elements. FIG. 1 is a perspective view schematically showing a capacitor device in one embodiment of the present disclosure. Figure 2 is a plan view schematically showing the state in which the upper cover has been removed from the capacitor. Figure 3 is a cross-sectional view along line III-III in Figure 2. FIG. 4 is a cross-sectional view schematically showing an example of a deformation of a protective member. FIG. 5 is a cross-sectional view schematically showing an example of deformation of the bottom wall and protective member. FIG. 6 is a cross-sectional view schematically showing an example of a deformation of a bottom wall and a protective member. FIG. 7 is a cross-sectional view schematically showing an example of a deformation of a protective member. Embodiments of the present disclosure will be described with reference to the drawings. In addition, in the drawings referenced below, identical or equivalent components are given the same number. FIG. 1 is a perspective view schematically showing a capacitor device in one embodiment of the present disclosure. FIG. 2 is a plan view schematically showing the state in which the upper cover is removed from the capacitor device. FIG. 3 is a cross-sectional view along line III-III in FIG. 2. The battery storage device (10) in this embodiment is mounted, for example, on the underside of a vehicle. Examples of vehicles include a hybrid electric vehicle, a plug-in hybrid electric vehicle, and a battery electric vehicle. As illustrated in FIGS. 1 to 3, the energy storage device (10) comprises six energy storage stacks (11 to 16), a housing (200), a protective member (280), a surrounding member (290), equipment (300), an equipment cooler (350), and a refrigerant pipe (400). Additionally, the number of energy storage stacks is not limited to six. Each capacitor stack (11 to 16) is formed in a long rectangular shape along the first direction DR1. As shown in FIG. 2, six capacitor stacks (11 to 16) are arranged side by side along the second direction DR2, which is orthogonal to both the first direction DR1 and the up-down direction. In this embodiment, the first direction DR1 corresponds to the front-rear direction of the vehicle, and the second direction DR2 corresponds to the left-right direction (width direction) of the vehicle. Each capacitor stack (11 to 16) includes at least one capacitor cell (100). In this embodiment, each capacitor stack (11 to 16) includes a plurality of capacitor cells (100) and a plurality of cooling plates (150). A plurality of capacitor cells (100) are arranged side by side along a first direction DR1. As shown in FIG. 3, each capacitor cell (100) has an electrode body (112), a cell case (114), and a pair of external terminals (116). The electrode body (112) may be composed of a wound body in which a positive electrode sheet and a negative electrode sheet are wound with a separator interposed between them, or may be composed of a laminated body in which a positive electrode sheet and a negative electrode sheet are laminated with a separator interposed between them. The electrode body (112) is formed in a long shape in the second direction DR2. The cell case (114) accommodates the electrode body (112). The cell case (114) is formed in a rectangular shape. The cell case (114) is made of a metal such as aluminum. A safety valve SV is provided on the lower surface of the cell case (114). A pair of external terminals (116) are provided on the outer surface of the cell case (114). In this embodiment, a pair of external terminals (116) are provided on the upper surface of the cell case (114). A pair of external terminals (116) are provided at positions spaced apart from each other in the width direction o