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JP-2026076087-A - Cushioning material and battery module

JP2026076087AJP 2026076087 AJP2026076087 AJP 2026076087AJP-2026076087-A

Abstract

[Problem] To provide a novel cushioning material. [Solution] One aspect of the invention is a cushioning member sandwiched between battery cells, comprising a first support plate and a second support plate facing each other in the direction opposite to the battery cells, and a plurality of elastic members sandwiched between the first support plate and the second support plate and capable of compression deformation, wherein each of the plurality of elastic members is fixed to only one of the first support plate and the second support plate, and the plurality of elastic members are arranged in positions that do not overlap each other in the opposing direction. [Selection Diagram] Figure 2

Inventors

  • 若松 洋平

Assignees

  • 株式会社イノアックコーポレーション

Dates

Publication Date
20260511
Application Date
20241023

Claims (7)

  1. A cushioning material that is placed between battery cells, The first support plate and the second support plate are located opposite each other in the direction in which the battery cells are facing each other. The system comprises a plurality of elastic members that are compressible and deformable when sandwiched between the first support plate and the second support plate, Each of the aforementioned multiple elastic members is fixed to only one of the first support plate and the second support plate. The plurality of elastic members are cushion members arranged in positions that do not overlap each other in the opposing directions.
  2. The cushion member according to claim 1, wherein the plurality of elastic members comprises a first elastic member fixed only to the first support plate and a second elastic member fixed only to the second support plate.
  3. The first support plate and the second support plate are both made of metal. The cushion member according to claim 1, wherein the plurality of elastic members are made of non-foamed rubber.
  4. The cushioning member according to claim 1, further comprising a holding member for holding the first support plate and the second support plate in an opposing position.
  5. The cushioning member according to claim 1, wherein the plurality of elastic members protrude from the opposing surfaces of the first support plate and the second support plate, and form a protruding structure extending along the opposing surfaces.
  6. The cushioning member according to claim 1, wherein the plurality of elastic members are columnar in shape and protrude from the opposing surfaces of the first support plate and the second support plate.
  7. A battery module comprising a cushioning member as described in any one of claims 1 to 6, provided between battery cells.

Description

This disclosure relates to cushioning materials and battery modules. Various cushioning materials have been developed to be placed between battery cells in a battery module (see, for example, Patent Document 1). Japanese Patent Publication No. 4508221 (paragraphs [0016] to [0020]) Figure 1 is a perspective view of a battery module in which a cushioning member according to the first embodiment is provided between battery cells.Figure 2A is a side cross-sectional view of a cushioning member sandwiched between battery cells, and Figure 2B is a side cross-sectional view of the first opposing member and the second opposing member that, when joined together, constitute the cushioning member.Figure 3A is a perspective view of the first opposing member, and Figure 3B is a perspective view of the second opposing member.Figure 4A is a side cross-sectional view of a cushioning member provided between battery cells in a battery module according to the second embodiment, and Figure 4B is a side cross-sectional view of a first opposing member and a second opposing member that are joined together to form a cushioning member.Figure 5A is a perspective view of the first opposing member, and Figure 5B is a perspective view of the second opposing member.Figure 6A is a plan view of the first opposing member, and Figure 6B is a plan view of the second opposing member.Figure 7 is a cross-sectional view along line A-A in Figure 4A.Figure 8A is a side cross-sectional view of the first support plate set on the lower mold, Figure 8B is a side cross-sectional view of the first rubber molding die assembled on the lower mold and the first support plate, Figure 8C is a side cross-sectional view of the rubber material filled into the first molding hole of the first rubber molding die, and Figure 8D is a side view of the elastic member vulcanized in the first molding hole closed by the upper mold.Figure 9A is a side cross-sectional view of the second support plate set on the lower mold, Figure 9B is a side cross-sectional view of the second rubber molding die assembled on the lower mold and the second support plate, Figure 9C is a side cross-sectional view of the rubber material filled into the second molding hole of the second rubber molding die, and Figure 9D is a side view of the elastic member vulcanized in the second molding hole closed by the upper mold.Figure 10A is a side cross-sectional view of a cushioning member provided between battery cells in a battery module according to the third embodiment, and Figure 10B is a side cross-sectional view of a first opposing member and a second opposing member that, when joined together, constitute the cushioning member.Figure 11 is a side cross-sectional view of a cushioning member provided between battery cells in a battery module according to the fourth embodiment.Figure 12A is a side cross-sectional view of the first and second opposing members sandwiched between a pair of films, Figure 12B is a side cross-sectional view of the pair of films whose outer edges are sealed together, and Figure 12C is a side cross-sectional view of the cushion member with the outer edges of the pair of films cut off.Figure 13A is a side cross-sectional view of a pair of opposing members constituting a cushion member according to another embodiment, and Figure 13B is a perspective view of the opposing members.Figure 14A is a plan view of opposing members constituting a cushion member according to another embodiment, and Figure 14B is a plan cross-sectional view of the elastic members of a pair of opposing members joined together. [First Embodiment] Figure 1 shows a cushion member 10 according to the first embodiment. The cushion member 10 is provided in the battery module 50. The battery module 50 is provided with a plurality of battery cells 51 that are stacked at predetermined intervals. The electrodes 52 of the plurality of battery cells 51 are connected to each other. The cushion member 10 is placed between the battery cells 51 and sandwiched between them. Note that the detailed structure of the cushion member 10 is omitted in Figure 1. In this embodiment, the battery cells 51 are flat and stacked in their thickness direction. Also in this embodiment, the cushioning member 10 is also flat and sandwiched between the battery cells 51 in its thickness direction. Furthermore, in this embodiment, the battery cells 51 and the cushioning member 10 are stacked horizontally. For example, the battery module 50 is installed in a vehicle (e.g., an electric vehicle) (for example, used as a drive battery). As shown in Figure 2A, the cushioning member 10 comprises a pair of support plates 11 and an elastic member 20. The pair of support plates 11 are positioned opposite each other in the opposing direction H (overlapping direction) of the battery cells 51. In this embodiment, the pair of support plates 11 are identical in shape and size, and are positioned directly opposite each other so as to completely overlap in the