CN-122000638-A - Power storage device and vehicle

Abstract

The present invention relates to an electric storage device and a vehicle. The power storage device includes a power storage module including a plurality of power storage cells, a housing that houses the power storage module, a bus bar module that is provided in the housing and electrically connects the plurality of power storage cells, and a biasing member that improves close contact between the plurality of power storage cells and the bus bar module. Since the biasing member improves the close contact between the plurality of electric storage cells and the bus bar module, the contact state between the electric storage cells and the bus bar can be improved.

Inventors

• Heng Chuan Guo Da
• NAKATA MITSUTAKA
• TAKESHITA SHINYA
• TAKATA NAOYUKI
• Mu Cunliang
• KATO KAZUHITO
• Junhong Frost
• One pool is shaken too
• Miyahara Qiantai

Assignees

• 丰田自动车株式会社

Dates

Publication Date

20260508

Application Date

20251104

Priority Date

20241107

Claims (7)

1. 1. An electrical storage device comprising: an electricity storage module including a plurality of electricity storage cells; An accommodating case accommodating the power storage module; A bus bar module that is provided in the housing case and electrically connects the plurality of power storage cells, and And a biasing member that improves close contact between the plurality of electric storage cells and the bus bar module.
2. 2. An electrical storage device comprising: an electricity storage module including a plurality of electricity storage cells; An accommodating case accommodating the power storage module; A bus bar module that is provided in the housing case and electrically connects the plurality of power storage cells, and A biasing member provided on a side opposite to the bus bar module with respect to the power storage module, wherein The biasing member biases the power storage module toward the bus bar module.
3. 3. The power storage device according to claim 1 or 2, wherein, The biasing member is disposed adjacent to the power storage module, The bus bar module is disposed on a side opposite to the biasing member with respect to the power storage module, and The biasing member biases the power storage module toward the bus bar module.
4. 4. The power storage device according to claim 1 or 2, wherein, The biasing member includes: a first plate portion provided adjacent to the power storage module, A second plate portion disposed spaced apart from the first plate portion, and An intermediate member provided between the first plate portion and the second plate portion and elastically deformed, and A coolant passage through which coolant can flow is formed between the first plate portion and the second plate portion by the intermediate member.
5. 5. The power storage device according to claim 1 or 2, further comprising an elastic member that is provided between the power storage module and the biasing member.
6. 6. The power storage device according to claim 1 or 2, wherein, The bus bar module is disposed below the power storage module, and The biasing member is provided on an upper surface of the power storage module.
7. 7. A vehicle comprising the electrical storage device according to any one of claims 1 to 6, wherein, The vehicle includes a vehicle body including a floor panel, and The power storage device is provided on a lower surface of the floor panel.

Description

Power storage device and vehicle Cross Reference to Related Applications The present non-provisional application is based on Japanese patent application No. 2024-195241 filed to the Japanese patent office on 7/11/2024, the entire contents of which are incorporated herein by reference. Technical Field The present disclosure relates to an electric storage device and a vehicle. Background Conventionally, various power storage devices have been proposed. For example, the power storage device described in chinese patent application publication No. 116686151 includes a housing case and a plurality of power storage cells housed in the housing case. Each of the electricity storage cells includes a cell case, and a positive electrode external terminal and a negative electrode external terminal provided on a lower surface of the cell case. Disclosure of Invention In the above-described power storage device, a bus bar for electrically connecting the power storage cells is provided on the lower surface of the power storage cells. Here, when the contact state between the electric storage cell and the bus bar is deteriorated, the electric connection of the electric storage cell may be disconnected. The present disclosure has been made in view of the above-described problems, and an object of the present disclosure is to provide an electric storage device and a vehicle capable of improving a contact state between an electric storage cell and a bus bar. An electrical storage device includes an electrical storage module including a plurality of electrical storage cells, an accommodating case accommodating the electrical storage module, a bus bar module provided in the accommodating case and electrically connecting the plurality of electrical storage cells, and a biasing member improving close contact between the plurality of electrical storage cells and the bus bar module. In the power storage device, the biasing member is provided adjacent to the power storage module, the bus bar module is provided on a side opposite to the biasing member with respect to the power storage module, and the biasing member biases the power storage module toward the bus bar module. The biasing member includes a first plate portion provided adjacent to the power storage module, a second plate portion provided spaced apart from the first plate portion, and an intermediate member provided between the first plate portion and the second plate portion and elastically deformed, and a coolant passage through which coolant can flow is formed between the first plate portion and the second plate portion through the intermediate member. The power storage device further includes an elastic member provided between the power storage module and the biasing member. The bus bar module is disposed below the power storage module, and the biasing member is disposed on an upper surface of the power storage module. The foregoing and other objects, features, aspects and advantages of the present disclosure will become more apparent from the following detailed description of the present disclosure when taken in conjunction with the accompanying drawings. Drawings Fig. 1 is a side view schematically showing a vehicle 2 having an electrical storage device 1 mounted thereon. Fig. 2 is an exploded perspective view showing the power storage device 1. Fig. 3 is a perspective view showing the electricity storage cell 30. Fig. 4 is a plan view showing the cooling device 12 and the like. Fig. 5 is a perspective view showing the cooling device 12. Fig. 6 is a perspective view showing the insulating plate 24, the bus bar module 29, and one electric storage cell 30. Fig. 7 is a cross-sectional view taken along line VII-VII shown in fig. 4. Fig. 8 is a cross-sectional view showing the power storage device 1A. Fig. 9 is an exploded perspective view showing the biasing member 14A. Fig. 10 is a sectional view showing an electrical storage device 1B according to a second modification. Fig. 11 is a cross-sectional view showing the power storage device 1C. Fig. 12 is a perspective view showing the power storage cell 30C. Detailed Description Embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be noted that in the drawings referenced below, identical or corresponding components will be denoted by identical reference numerals. Fig. 1 is a side view schematically showing a vehicle 2 having an electric storage device 1 mounted on the vehicle. The vehicle 2 includes a vehicle body 3. The vehicle body 3 includes a floor panel 4, and the floor panel 4 is provided at the bottom of the vehicle body 3. The floor panel 4 separates an exterior space of the vehicle from an interior space of the vehicle. Further, the power storage device 1 is provided on the lower surface of the floor panel 4. It should be noted that the vehicle body 3 includes a pair of side members (not shown) that are disposed apart from each other in the vehicle width dire