KR-20260062813-A - POWER STORAGE DEVICE

Abstract

A capacitor device comprises a first capacitor cell (capacitor cell), a second capacitor cell (capacitor cell), and a conductor member. Additionally, each of the first capacitor cell and the second capacitor cell has an electrode terminal on the conductor member side. Furthermore, each of the electrode terminal of the first capacitor cell and the electrode terminal of the second capacitor cell is connected to the conductor member via a conductive adhesive.

Inventors

• 츠네카와 구니히로
• 나카다 고키
• 다케시타 신야
• 다카하시 나오유키
• 기무라 료
• 가토 가즈히토
• 시모나카 도시히로
• 이치사와 고타
• 미야하라 겐타

Assignees

• 도요타 지도샤（주）

Dates

Publication Date

20260507

Application Date

20250717

Priority Date

20241029

Claims (5)

1. A capacitor device comprising a first capacitor cell, a second capacitor cell, and a conductor member, Each of the first capacitor cell and the second capacitor cell has an electrode terminal on the conductor member side, A capacitor device in which the electrode terminal of the first capacitor cell and the electrode terminal of the second capacitor cell are each connected to the conductor member via a conductive adhesive.
2. In Article 1, The first capacitor cell and the second capacitor cell are arranged in a direction orthogonal to the vertical direction, and A capacitor device in which the electrode terminal of the first capacitor cell and the electrode terminal of the second capacitor cell are each connected to the conductor member in a vertical downward direction.
3. In Article 2, The above-described capacitor device further comprises an upper cover, a lower case, a shear panel, a wiring board, and a cooler, and The first capacitor cell, the second capacitor cell, and the wiring board are accommodated between the lower case and the upper cover, and The above wiring board has a wiring pattern formed by a plurality of conductor members including the conductor member, and The above cooler is disposed between the first capacitor cell and the second capacitor cell, and Each of the first capacitor cell and the second capacitor cell additionally has an exhaust valve on the surface where the electrode terminal is formed, A storage device having an exhaust passage formed between the lower case and the shear panel.
4. In any one of paragraphs 1 to 3, A capacitor device having a harmonization treatment performed on the surface of the above-mentioned conductor member, specifically on a first portion to which the electrode terminal of the first capacitor cell is connected and a second portion to which the electrode terminal of the second capacitor cell is connected.
5. In Article 4, A harmonization treatment is performed on the first surface of the electrode terminal of the first capacitor cell, and the first surface is connected to the first portion of the conductor member via a first conductive adhesive, and A capacitor device in which a harmonization treatment is performed on the second surface of the electrode terminal of the second capacitor cell, and the second surface is connected to the second portion of the conductor member via a second conductive adhesive.

Description

Power Storage Device The present disclosure relates to a storage device. Chinese Patent Application Publication No. 116686151 discloses a capacitor device comprising a plurality of capacitor cells fixed within a case (receiving cavity). The electrode terminals of each capacitor cell are formed facing the bottom wall of the case. The features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, in which like reference numerals denote like elements: FIG. 1 is a drawing for explaining an overview of a capacitor device related to an embodiment of the present disclosure. FIG. 2 is a drawing showing the interior of a capacitor device related to the present embodiment. FIG. 3 is a cross-sectional view of a capacitor device along line III-III in FIG. 2. FIG. 4 is a cross-sectional view of a capacitor device along the line IV-IV in FIG. 2. FIG. 5 is a drawing showing the connection portion of the capacitor cell and wiring board shown in FIG. 2. FIG. 6 is a diagram for explaining the connection method of the capacitor cell and wiring board shown in FIG. 2. Embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, identical or substantial parts are denoted by the same reference numerals, and their descriptions are not repeated. In each drawing used below, the X-axis, Y-axis, and Z-axis represent three mutually orthogonal axes. Hereinafter, the direction indicated by the arrows of the X-axis, Y-axis, and Z-axis is indicated by "+", and the opposite direction is indicated by "-". FIG. 1 is a drawing for explaining an overview of a capacitor device related to this embodiment. Referring to FIG. 1, the capacitor device (B) related to this embodiment includes a lower case (100) (first case member), an upper cover (110) (second case member), and a shear panel (120) (third case member), and these function as cases for the capacitor device (B). The lower case (100) is open upward (+Z side) and accommodates a plurality of capacitor cells and various parts related to these capacitor cells. Although details will be described later, the lower case (100) accommodates capacitor cells, a cooler, and a junction box (hereinafter referred to as "J/B"), etc. (see FIG. 2). Each of the upper cover (110) and the shear panel (120) is fixed to the lower case (100). The upper cover (110) is positioned above the lower case (100) and functions as a cover for the lower case (100). The shear panel (120) is positioned below the lower case (100) (-Z side) to suppress impact to the lower case (100) caused by road surface interference. Additionally, an exhaust passage is formed between the lower case (100) and the shear panel (120). When the battery device (B) is mounted on a vehicle, for example, the -Z side is downward (vertically downward), the +Z side is upward (vertically upward), the -X side is the front side of the vehicle, and the +X side is the rear side of the vehicle. The battery device (B) may function as a drive battery device generally referred to as a "battery pack." The vehicle may be an electric vehicle (BEV) or another electric vehicle (xEV). In the lower part of FIG. 1, a drawing is shown of a lower case (100) in an empty state (a state in which nothing is contained) viewed from above (+Z side). The lower case (100) has a bottom wall (101) (bottom part) and a periphery wall (102) (periphery part). The bottom wall (101) includes a region (R1 to R5). The periphery wall (102) includes side walls (W1 to W4). The side walls (W1, W2, W3, W4) correspond to the ends of the -X side, +X side, -Y side, and +Y side of the lower case (100), respectively. The side wall (W2) includes side walls (W21 to W23). The side walls (W21 to W23) are located on the +X side of the side walls (W3, W4) extending in the X direction, and among them, the side wall (W22) is located furthest to the +X side. A bracket (121, 122) is formed on each side wall (W21, W23). A discharge valve (151, 152) is formed on the side wall (W22). The side wall (W22) is connected to the side walls (W3, W4) via the side walls (W21, W23). Also, the opposite ends (-X side) of the side walls (W3 and W4) are connected to each other via the side wall (W1) extending in the Y direction. A bracket (131, 132) is formed on each side wall (W3, W4). Brackets (111 and 112) are formed on the side wall (W1). Each of the side walls (W1 to W4) stands upright in the +Z direction from the periphery of the floor wall (101). The internal space of the lower case (100) is surrounded by the side walls (W1 to W4). By fastening the brackets (111, 112, 121, 122, 131, 132) to, for example, the floor member of the vehicle, the battery device (B) is connected to, for example, the body of the vehicle (e.g., floor panel). In the bottom wall (101), partition walls (103, 104) extending in the Y direction are formed. Each of the partition walls