JP-2026075414-A - Energy storage device

JP2026075414AJP 2026075414 AJP2026075414 AJP 2026075414AJP-2026075414-A

Abstract

[Problem] To provide an energy storage device that can contain multiple energy storage elements within a case with a simple configuration. [Solution] The energy storage device 1 comprises an energy storage unit and a case 100 that houses the energy storage unit, wherein the energy storage unit comprises a plurality of energy storage elements 200 and two resin restraining members 400, a first restraining member 410 and a second restraining member 420, that restrain the plurality of energy storage elements by sandwiching them in a first direction which is the direction in which the plurality of energy storage elements are arranged, and the energy storage device comprises a first joint 810 that joins the first restraining member and the second restraining member by welding or adhesive. [Selection Diagram] Figure 7

Inventors

坂口惣一

Assignees

株式会社ＧＳユアサ

Dates

Publication Date: 20260508
Application Date: 20241022

Claims (6)

A power storage device comprising a power storage unit and a case for housing the power storage unit, The aforementioned energy storage unit is Multiple energy storage elements, In the first direction, which is the direction in which the plurality of energy storage elements are arranged, the system comprises a first restraining member and a second restraining member, which are two resin restraining members that restrain the plurality of energy storage elements by sandwiching them. The energy storage device comprises a first joint for joining the first restraining member and the second restraining member by welding or adhesive.
The energy storage device according to claim 1, wherein the case comprises a first case and a second case arranged in the first direction.
The energy storage device according to claim 2, wherein the first restraining member and the first case are arranged facing each other and in contact in the first direction.
The energy storage device according to claim 3, further comprising a second joint for joining the first restraining member and the first case by welding or adhesive.
The system further comprises a third joint that joins the first case and the second case by welding or bonding, The energy storage device according to claim 4, wherein the second joint and the third joint are arranged adjacent to each other in a second direction intersecting the first direction.
The energy storage device according to any one of claims 2 to 5, further comprising a fourth joint for joining the second restraining member and the second case by welding or adhesive.

Description

This invention relates to an energy storage device. Patent Document 1 discloses a battery storage unit comprising a battery stack in which multiple battery modules are stacked, and a housing that accommodates it. International Publication No. 2015/151869 Figure 1 is a perspective view showing the external appearance of an energy storage device according to an embodiment.Figure 2 is a perspective view showing the internal configuration of the case of the energy storage device according to the embodiment.Figure 3 is a perspective view showing the configuration of the energy storage unit and circuit board according to the embodiment.Figure 4 is an exploded perspective view showing the components of the energy storage unit according to the embodiment when it is disassembled.Figure 5 is a perspective view showing the configuration of the first case, second case, first restraint member, and second restraint member according to the embodiment.Figure 6 is a cross-sectional view showing the configuration of the first case, second case, first restraint member, and second restraint member according to the embodiment.Figure 7 is a cross-sectional view showing the configuration of the joint between the first case, the second case, the first restraining member, and the second restraining member according to the embodiment.Figure 8 is an enlarged cross-sectional view showing an enlarged view of the configuration of the joint between the first case, second case, first restraint member, and second restraint member according to the embodiment. (1) An energy storage device according to one aspect of the present invention comprises an energy storage unit and a case housing the energy storage unit, wherein the energy storage unit comprises a plurality of energy storage elements and two resin-made restraining members, a first restraining member and a second restraining member, which restrain the plurality of energy storage elements in a first direction, which is the direction in which the plurality of energy storage elements are arranged, and the energy storage device comprises a first joint for joining the first restraining member and the second restraining member by welding or adhesive. According to one aspect of the present invention, the energy storage device includes a first joint that joins a first restraining member and a second restraining member, both made of resin, which restrain a plurality of energy storage elements in a first direction, by welding or adhesive. Because the two restraining members (the first and second restraining members) are made of resin, they can be easily joined using welding or adhesive. Therefore, a simple configuration allows for the restraint of multiple energy storage elements within the case. (2) In the energy storage device described in (1) above, the case may comprise a first case and a second case arranged in the first direction. According to the energy storage device described in (2) above, the case comprises a first case and a second case aligned in the first direction. Therefore, in the first direction, the first and second cases can sandwich the two restraining members. This allows the first and second cases to reinforce the two restraining members even if the energy storage element expands in the first direction. (3) In the energy storage device described in (2) above, the first restraining member and the first case may be arranged facing each other and in contact in the first direction. According to the energy storage device described in (3) above, the first restraining member and the first case come into contact in the first direction, allowing the first case to hold down the first restraining member. This suppresses the swelling of the energy storage element even if it bulges in the first direction. (4) The energy storage device described in (3) above may further include a second joint that joins the first restraining member and the first case by welding or adhesive. According to the energy storage device described in (4) above, by providing a second joint for joining the first restraining member and the first case by welding or adhesive, the first restraining member and the first case can be easily joined using welding or adhesive. (5) The energy storage device described in (4) above may further include a third joint that joins the first case and the second case by welding or adhesive, and the second joint and the third joint may be arranged adjacent to each other in a second direction intersecting the first direction. According to the energy storage device described in (5) above, by providing a third joint for joining the first and second cases by welding or adhesive, the first and second cases can be easily joined using welding or adhesive. Since the second and third joints are located adjacent to each other, when joining the first and second cases, the first case and the first restraining member are also joined, thereby simultaneously forming the second and third joints. This