CN-122000549-A - Power storage device

Abstract

The power storage device includes at least one power storage unit, a bottom wall, a panel member provided below the bottom wall, and a protection member provided on the bottom wall. A safety valve is provided on the lower surface of the power storage unit. The bottom wall has a through hole provided at a position opposed to the relief valve. The protection member includes a heat insulating member provided in the through hole. The insulating member includes a receiving surface located below the upper surface of the bottom wall.

Inventors

• IWATA MAKOTO
• ISHIKAWA SHOTARO
• FUJIWARA SHUNSUKE
• NAKAMURA KEIICHIRO
• NAKANO TAKAHIKO
• SUZUKI YASUSUKE
• Ishizumi Masahiro
• MATSUO KENSUKE
• Kumuma Yoshiya

Assignees

• 丰田自动车株式会社

Dates

Publication Date

20260508

Application Date

20250827

Priority Date

20241106

Claims (4)

1. 1. An electric storage device, comprising: at least one electric storage unit; a bottom wall disposed below the at least one electric storage unit; A panel member disposed below the bottom wall and defining a smoke discharge path together with the bottom wall, and A protection member provided to the bottom wall, A safety valve is provided at a lower surface of the at least one electric storage unit, The bottom wall has a through hole provided at a position opposite to the safety valve, The protective member includes a heat insulating member disposed in the through hole, The heat insulating member includes a receiving surface located below an upper surface of the bottom wall.
2. 2. The power storage device according to claim 1, wherein, The protective member further includes a holding piece holding the heat insulating member, The holding piece includes an adhesive portion that adheres to the receiving surface at a position lower than an upper surface of the bottom wall.
3. 3. The power storage device according to claim 1, wherein, The through hole includes: a reduced diameter portion having a diameter gradually decreasing from the upper surface of the bottom wall toward the lower side, and And a holding portion extending downward from a lower end portion of the reduced diameter portion, for holding the heat insulating member.
4. 4. The power storage device according to any one of claims 1 to 3, wherein, The power storage device further includes an enclosing member provided between the at least one power storage unit and the bottom wall, and having a shape enclosing the through hole.

Description

Power storage device Technical Field The present disclosure relates to an electric storage device. Background For example, japanese patent laying-open No. 2024-501935 discloses an electrical apparatus including a plurality of battery cells, a first housing accommodating the plurality of battery cells, a second housing accommodating the first housing, and a partition member provided in the second housing. The spacer supports the first frame above the bottom surface of the second frame. A collection chamber is formed below the partition member in the second frame. A third weak area is provided on the lower surface of each battery cell, a pressure release area is provided on the bottom surface of the first frame, and a second weak area is provided on the separator. The exhaust discharged from the battery cell through the third weak area of the battery cell flows into the collecting chamber formed below the partition member via the pressure relief area and the second weak area. Disclosure of Invention In the electric device described in japanese patent laying-open No. 2024-501935, the discharge from the battery cell through the third weak area takes time to rupture the pressure release area and the second weak area, during which a part of the content (so-called fragments) of the battery cell contained in the discharge may not pass through the pressure release area and the second weak area and fly to the space between the battery cell and the first frame. An object of the present disclosure is to provide an electric storage device that suppresses scattering of contents of an electric storage unit contained in an exhaust of the electric storage unit. The power storage device according to one aspect of the present disclosure includes at least one power storage unit, a bottom wall disposed below the at least one power storage unit, a panel member disposed below the bottom wall and defining a smoke discharge path together with the bottom wall, and a protection member disposed on the bottom wall, wherein a safety valve is disposed on a lower surface of the at least one power storage unit, the bottom wall has a through hole disposed at a position opposite to the safety valve, the protection member includes a heat insulating member disposed in the through hole, and the heat insulating member includes a receiving surface disposed below an upper surface of the bottom wall. According to the present disclosure, it is possible to provide an electric storage device that suppresses scattering of the content of an electric storage unit contained in the discharge of the electric storage unit. Drawings 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, in which: fig. 1 is a perspective view schematically showing an electric storage device according to an embodiment of the present disclosure. Fig. 2 is a plan view schematically showing a state in which the upper cover is removed from the power storage device. Fig. 3 is a cross-sectional view taken along line III-III in fig. 2. Fig. 4 is a cross-sectional view schematically showing a modification of the protective member. Fig. 5 is a cross-sectional view schematically showing a modification of the bottom wall and the protection member. Fig. 6 is a cross-sectional view schematically showing a modification of the bottom wall and the protection member. Fig. 7 is a cross-sectional view schematically showing a modification of the protective member. Detailed Description Embodiments of the present disclosure will be described with reference to the accompanying drawings. In the drawings referred to below, the same reference numerals are given to the same or corresponding members. Fig. 1 is a perspective view schematically showing an electric storage device according to an embodiment of the present disclosure. Fig. 2 is a plan view schematically showing a state in which the upper cover is removed from the power storage device. Fig. 3 is a cross-sectional view taken along line III-III in fig. 2. The power storage device 10 in the present embodiment is mounted on a lower portion of a vehicle, for example. Examples of the vehicle include a hybrid electric vehicle (hybrid ELECTRIC VEHICLE), a plug-in hybrid electric vehicle (plug-in hybrid ELECTRIC VEHICLE), and an electric vehicle (battery ELECTRIC VEHICLE). As shown in fig. 1 to 3, the power storage device 10 includes six power storage stacks 11 to 16, a frame 200, a protection member 280, an enclosure member 290, equipment 300, equipment coolers 350, and refrigerant pipes 400. The number of the electric storage stacks is not limited to six. Each of the power storage stacks 11 to 16 is formed in a rectangular parallelepiped shape elongated in the first direction DR 1. As shown in fig. 2, the six power storage stacks 11 to 16 are arranged along a second direc