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KR-20260064540-A - POWER STORAGE DEVICE

KR20260064540AKR 20260064540 AKR20260064540 AKR 20260064540AKR-20260064540-A

Abstract

A capacitor device comprises a first capacitor cell, a second capacitor cell, and a wiring board. The wiring board has a substrate and a plurality of conductor members formed on the vertically upper surface of the substrate. The plurality of conductor members includes a first conductor member and a second conductor member. The first capacitor cell has a first electrode terminal connected to the first conductor member on the vertically lower surface of the first capacitor cell. The second capacitor cell has a second electrode terminal connected to the second conductor member on the vertically lower surface of the second capacitor cell. At least one convex portion, a concave portion, and a through hole are formed between the first electrode terminal and the second electrode terminal of the substrate.

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
20251021
Priority Date
20241030

Claims (9)

  1. A capacitor device comprising a first capacitor cell, a second capacitor cell, and a wiring board, The above wiring board has a substrate and a plurality of conductive members formed on the vertically upper surface of the substrate, and The plurality of conductor members includes a first conductor member and a second conductor member, and The first capacitor cell has a first electrode terminal connected to the first conductor member on the vertically lower surface of the first capacitor cell, The second capacitor cell has a second electrode terminal connected to the second conductor member on the vertically lower surface of the second capacitor cell, A capacitor device having at least one convex portion, a concave portion, and a through hole formed between the first electrode terminal and the second electrode terminal of the substrate.
  2. In Article 1, A capacitor device having one or more through holes formed between the first electrode terminal and the second electrode terminal of the substrate.
  3. In Article 2, A capacitor device having a substrate having one or more first parts located at the edge portions of one or more through holes and a second part having a higher degree of hydrophobicity than the first part.
  4. In Article 2, A capacitor device having a substrate having a first inclined portion extending downward from the first electrode terminal toward the one or more through holes, and a second inclined portion extending downward from the second electrode terminal toward the one or more through holes.
  5. In Article 2, A concave portion is formed between the first electrode terminal and the second electrode terminal of the above substrate, and A capacitor device having one or more through holes formed within the above-mentioned concave portion.
  6. In any one of paragraphs 2 through 5, The above-described capacitor device has an exhaust passage through which gas discharged from each of the first capacitor cell and the second capacitor cell flows, and The above one or more through holes are connected to the exhaust passage, forming a capacitor device.
  7. In Article 6, A capacitor device having an absorbent material formed between the above one or more through holes and the above exhaust passage.
  8. In Article 6, Each of the first capacitor cell and the second capacitor cell is additionally equipped with an explosion-proof valve on the lower vertical surface, and The above substrate is located vertically lower than the explosion-proof valve of each of the first capacitor cell and the second capacitor cell, and The exhaust passage is located vertically lower than the substrate, and A capacitor device having a cooler formed on the lower vertical surface of the above substrate.
  9. In Article 1, A capacitor device having one or more convex portions formed between the first electrode terminal and the second electrode terminal of the substrate.

Description

Power Storage Device The present disclosure relates to a capacitor device having a plurality of capacitor cells. The specification of 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. FIG. 1 is a drawing showing a vehicle equipped with a battery storage device related to an embodiment of the present disclosure. FIG. 2 is a diagram showing the schematic configuration of a capacitor device related to an embodiment of the present disclosure. FIG. 3 is a top view of the interior of the lower case of the capacitor device related to the present embodiment. FIG. 4 is a drawing showing the lower case of the capacitor device in an empty state related to the present embodiment. FIG. 5 is a drawing showing an example of the configuration of a capacitor cell related to the present embodiment. Figure 6 is a view from below of each capacitor cell within the lower case shown in Figure 3. FIG. 7 is a drawing showing an example of the configuration of a wiring board inside the lower case shown in FIG. 3. FIG. 8 is a cross-sectional view of a capacitor device along line VIII-VIII in FIG. 3. FIG. 9 is a cross-sectional view of a capacitor device along the line IX-IX in FIG. 3. FIG. 10 is a cross-sectional view of a capacitor device at the XX line in FIG. 3. FIG. 11 is a cross-sectional view of a capacitor device along the line XI-XI in FIG. 3. FIG. 12 is a drawing for explaining the cross-sectional structure of the wiring board shown in FIG. 7. FIG. 13 is a cross-sectional view of a capacitor device along line XIII-XIII in FIG. 3. FIG. 14 is a drawing showing an example of deformation of the concave portion shown in FIG. 13. FIG. 15 is a drawing showing an example in which the concave portion shown in FIG. 13 is not formed. FIG. 16 is a drawing showing an example in which multiple through holes are formed as shown in FIG. 13. FIG. 17 is a drawing showing a first modified example of the opening of the substrate shown in FIG. 13. FIG. 18 is a drawing showing a second modified example of the opening of the substrate shown in FIG. 13. FIG. 19 is a drawing showing an example in which a cooler is formed on the substrate shown in FIG. 13. FIG. 20 is a drawing showing an example in which an absorbent material is formed on the substrate shown in FIG. 13. FIG. 21 is a drawing showing a first example in which the through hole shown in FIG. 13 is changed into a convex portion. FIG. 22 is a drawing showing a second example in which the through hole shown in FIG. 13 is changed into a convex portion. FIG. 23 is a drawing showing a modified example of the partition wall shown in FIG. 4. Embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, identical or substantial parts are given 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 showing a vehicle equipped with a battery storage device related to this embodiment. In FIG. 1, the -X side corresponds to the front side of the vehicle (1), and the +X side corresponds to the rear side of the vehicle (1). Also, the -Z side corresponds to the downward side (vertical direction lower side), and the +Z side corresponds to the upward side (vertical direction upper side). Referring to FIG. 1, the vehicle (1) is equipped with a battery storage device (B). The battery storage device (B) may function as a driving battery storage device generally referred to as a "battery pack." The vehicle (1) is configured to be able to drive using power output from the battery storage device (B). The vehicle (1) may be equipped with a motor that rotates the driving wheels of the vehicle (1) using power supplied from the battery storage device (B). The vehicle (1) is, for example, an electric vehicle (BEV) that does not have an internal combustion engine. However, it is not limited to this, and the vehicle (1) may be an HEV (hybrid electric vehicle) or PHEV (plug-in hybrid electric vehicle) equipped with an internal combustion engine, or may be another electric vehicle (xEV). The battery device (B) is installed, for example, under the floor of the vehicle (1). The battery device (B) may be connected to the body of the vehicle (1). The battery device (B) has brackets (111, 112) at the -X side end and brackets (121, 122) at the +X side end (see FIG. 3 described later). Although not shown in FIG. 1, the battery device (B) additionally has brackets at both ends in the Y direction (for example, brackets (131, 132) shown in FIG. 3 described later). By fastening these brackets