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Power supply device, electric vehicle using same, and power storage device

A technology for power supply devices and vehicles, applied to batteries, circuits, electrical components, etc., can solve the problems of increasing the diameter of bolts, increasing the stress of brackets, worrying about fatigue, etc., and achieve the effect of improving reliability

Pending Publication Date: 2022-03-11
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a structure, the amount of swelling of each battery cell accumulates, resulting in an increase in the elongation of the entire battery stack.
As a result, there is a problem that a large load is applied to a fixing point for fixing the power supply unit to a bracket of an electric vehicle or the like.
For example, if for Figure 13 A side view of the power supply unit 900 shown in length like Figure 14 If the number of stacked battery cells is increased as in the power supply unit 700 shown in the side view of , the amount of elongation will accumulate and increase according to the number of stacks. As a result, stress will be applied to the fixing point of the bracket 760 that fixes the power supply unit. The load also becomes too heavy, and I worry about fatigue and aging
[0005] In addition, if the elongation of the battery stack continues, the tightening strip 704 that receives the expansion force will also become longer and the elongation will increase, so the stress on the bracket will further increase.
If the bracket 760 and bolts corresponding to such elongation are prepared, the material of the bracket 760 may be changed to an expensive type, or the thickness of the plate may be increased, or the diameter and number of bolts may be increased, resulting in an increase in cost and weight. question

Method used

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  • Power supply device, electric vehicle using same, and power storage device
  • Power supply device, electric vehicle using same, and power storage device
  • Power supply device, electric vehicle using same, and power storage device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0040] Figure 1 ~ Figure 4 Each shows the power supply device 100 according to Embodiment 1 of the present invention. In these figures, figure 1 A schematic side view illustrating a state in which the power supply device 100 according to Embodiment 1 is fixed to the power supply target device PD is shown, figure 2 show figure 1 An exploded perspective view of the power supply unit 100, image 3 show figure 2 An enlarged cross-sectional view of the main part of the power supply device 100 along the line III-III, Figure 4 show figure 2 A further exploded perspective view of the power supply device 100 of FIG. The power supply device 100 shown in these figures has: a battery stack 10, which is formed by stacking a plurality of battery cells 1; a pair of end plates 20, which cover both side end surfaces of the battery stack 10; The member 15 fastens the end plates 20 to each other, and the bracket 60 fixes the pair of end plates 20 to the power supply target device P...

Embodiment approach 2

[0090] In addition, in figure 1 In the example shown above, the structure in which the guide shaft 71 is provided on the side of the end plate 20 and the guide cylinder 72 is provided on the side of the bracket 60 is shown, but the present invention is not limited to this structure, and for example, a guide cylinder may be provided on the side of the end plate. And a guide shaft is provided on the bracket side. Such an example is shown as a power supply device 200 according to Embodiment 2 in Image 6 enlarged sectional view of the . In this power supply device 200 , the end plate 20B has a guide cylinder 72B, and the bracket 60B has a guide shaft 71B. Also in such a configuration, the end plate 20B can be linearly displaced by the guide mechanism 70B, and the displacement can be absorbed by the elastic body 75 so that the displacement is not transmitted to the bracket 60B side.

Embodiment approach 3

[0092] In addition, in the above example, the example in which the guide mechanism 70 and the elastic body 75 are provided as independent members and provided at the interface between the end plate 20 and the bracket 60 has been described, but the present invention is not limited to this structure. The above-mentioned guide mechanism and the elastic body may be integrally formed. Such an example is shown as a power supply device 300 according to Embodiment 3 in Figure 7 enlarged sectional view of the . In this power supply device 300, with image 3 Similarly, guide shaft 71C protrudes from end plate 20C side, and is inserted into guide cylinder 72C opened in bracket 60C. On the other hand, the elastic body 75C is formed into a coil spring shape, and the loop of the coil spring is made larger than the inner diameter of the guide cylinder 72C. Furthermore, if Figure 7 As shown, the configuration is such that the guide shaft 71C passes through the ring of the coil spring, s...

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PUM

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Abstract

In order to prevent a large load from being applied to a fixed structure fixed to an electric vehicle or the like even when a battery stack is elongated, a power supply device (100) for being fixed to a power supply target device (PD) is provided with: a plurality of battery cells (1) each having a square exterior can; a pair of end plates (20) that cover both end surfaces of a battery stack in which the plurality of battery cells (1) are stacked; a plurality of plate-shaped fastening members that extend in the stacking direction of the plurality of battery cells (1), are disposed on respective opposing side surfaces of the battery stack, and fasten the end plates (20) to each other; a holder (60) for fixing each of the pair of end plates (20) to a power supply target device (PD); a guide mechanism (70) that slides the end plate (20) in the stacking direction of the battery stack at at least one of the interfaces between the end plate (20) and the holder (60); and an elastic body (75) disposed on at least one interface between the end plate (20) and the bracket (60).

Description

technical field [0001] The present invention relates to a power supply device, an electric vehicle using the power supply device, and a power storage device. Background technique [0002] The power supply device is used in a power supply device for driving an electric vehicle, a power supply device for storing electricity, and the like. In such a power supply device, a plurality of chargeable and dischargeable battery cells are laminated. In addition, it is known that the outer casing of the battery cell expands due to charging and discharging. Generally speaking, if Figure 12 As shown in the perspective view of , in the power supply device 900, end plates 903 are arranged on the end faces of both sides of the battery stack formed by alternately stacking the battery cells 901 of the square outer can and the insulating spacers 902, The end plates 903 are fastened to each other by metal tightening bars 904 . [0003] Additionally, if Figure 13 As shown, in such a power s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/258H01M50/209H01M50/249
CPCH01M50/258H01M50/209H01M50/249H01M10/48H01M10/44H01M50/264Y02E60/10H01M50/262H01M50/289H01M10/0486H01M2220/20
Inventor 高桥宏行
Owner SANYO ELECTRIC CO LTD