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Power source device and thermal insulation sheet for power source device

A technology of power supply device and heat insulation sheet, which is applied in the direction of protecting pipes, batteries, circuits, etc. through heat insulation, and can solve the problems such as the large deformation of the outer tank and the inability to follow the deformation of the secondary battery cells.

Pending Publication Date: 2021-08-06
AWA PAPER MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that these plates are hard and hardly deform, so they cannot follow the deformation of the secondary battery cell
In addition, there is a tendency that the increase in the capacity of the secondary battery cell increases the amount of deformation of each exterior can

Method used

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  • Power source device and thermal insulation sheet for power source device
  • Power source device and thermal insulation sheet for power source device
  • Power source device and thermal insulation sheet for power source device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0035] The power supply device according to Embodiment 1 is shown in figure 1 exploded perspective view. The power supply device 100 shown in the figure includes a plurality of secondary battery cells 20 and a heat insulating sheet 10 interposed between the secondary battery cells 20 . In the secondary battery cell 20 , the exterior can 21 is formed into a bottomed cylindrical square shape, and a plurality of secondary battery cells 20 are stacked with their main surfaces facing each other. For lamination, for example, both end faces of battery stack 25 obtained by stacking secondary battery cells 20 are covered with end plates 30 , and end plates 30 are fastened together with fastening members. In addition, the battery stack 25 is fixed to the base plate 40 as necessary. For example, the base plate 40 may function as a cooling plate by circulating a refrigerant inside the base plate 40 .

[0036] Each secondary battery cell 20 houses an electrode body inside an exterior ca...

Embodiment approach 2

[0060] An example in which a heat-resistant sheet is used as a separator between cells of a lithium ion secondary battery has been described above. However, the present invention does not limit the application of the heat insulating sheet to a separator for heat insulation of a battery, and may be used in other applications. The present invention can be suitably used in applications requiring reliability by making use of the characteristics of heat resistance and small change in thermal conductivity. In addition, since the compressive elastic modulus is low, it can also be used well for applications requiring deformation. For example, it can also be used as a buffer material between an explosion-proof valve of a secondary battery cell and an air duct, a protective heat insulating material of a circuit board, and a heat insulating material between modules. As an example, an example in which a heat insulating sheet is used as a buffer material between an explosion-proof valve o...

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PUM

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Abstract

Provided is a thermal insulation sheet with increased conformance to deformation. This thermal insulation sheet for a power source device is for thermally insulating a plurality of secondary battery cells 20 that are connected to one another in series and / or in parallel and layered, said thermal insulation sheet being formed from an electrically insulating rubber composition and having a compression elastic modulus of 4000-10000kPa. Consequently, due to this thermal insulation sheet with a low compression elastic modulus and a high compression recovery rate having been interposed between the secondary battery cells 20, the present invention has the advantage of demonstrating conformance to deformation even when the secondary battery cells 20 cause thermal expansion or contraction, and easily returning to an original shape.

Description

technical field [0001] The present invention relates to a power supply device and a heat insulating sheet for the power supply device. Background technique [0002] A power supply device obtained by stacking a plurality of square or cylindrical secondary battery cells is used as a power source for driving electric vehicles such as electric vehicles, hybrid vehicles, electric buses, and trams, or as a backup power source for factories and base stations, and Used as a battery for household use. In recent years, weight reduction and higher capacity of power supply devices have been demanded, and high-capacity batteries such as lithium-ion secondary batteries have been used as secondary battery cells. [0003] On the other hand, in the case of using a large number of high-capacity secondary battery cells such as lithium-ion secondary batteries, there is a possibility that one secondary battery cell becomes high temperature for some reason and thermal runaway occurs, and the rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/658F16L59/02H01M50/242H01M10/613H01M10/625H01M10/627H01M10/643H01M10/647H01M10/651H01M50/227H01M50/238H01M50/291H01M50/293
CPCF16L59/02H01M10/625H01M10/627H01M10/643H01M10/647H01M10/651H01M10/613H01M10/658Y02E60/10H01M50/293H01M50/291H01M50/227H01M50/238H01M50/383H01M2220/20
Inventor 永野晃章
Owner AWA PAPER MFG