Restraint device

Abstract

The utility model provides a kind of restraint device, can inhibit the collision of the power storage module and restraint device of stack caused by dumping.The restraint device and stack constitute stack unit together, for constraining to stack.The restraint device includes first restraint plate, second restraint plate, connecting component and buffer component.Stack unit is placed on placement platform and forms cuboid shape, with the placement surface opposite to placement platform, the top surface spaced apart from placement surface in vertical direction, and the circumferential surface connecting placement surface and top surface.Placement surface has first end edge and second end edge spaced apart from each other in width direction, and circumferential surface has first end surface and second end surface spaced apart from each other in width direction.First end surface is erected from first end edge, and buffer component is arranged on first end surface and protrudes outward from first end surface.

Description

Technical Field

[0001] This disclosure relates to a restraint device. Background Technology

[0002] Japanese Patent Application Publication No. 2019-216073 discloses an energy storage device comprising a stack having a plurality of energy storage modules arranged in a stacking direction, and a constraint device for constraining the stack in the stacking direction.

[0003] In the energy storage device described in Japanese Patent Application Publication No. 2019-216073, for example, when the energy storage device tilts, the position of the energy storage module in the laminate may shift. In this case, the energy storage module may collide with the restraint device, thereby posing a risk of damage to the energy storage module. Utility Model Content

[0004] This disclosure is made to solve the above-mentioned problems, and its purpose is to provide a restraint device that can suppress the collision between the energy storage module of the stacked body and the restraint device caused by tilting.

[0005] According to a first aspect of this disclosure, a constraint device, together with a laminate, constitutes a laminate unit. The constraint device constrains the laminate, which includes a plurality of energy storage modules arranged in a stacking direction. The laminate includes a first main surface and a second main surface spaced apart from the first main surface in the stacking direction. The constraint device comprises: a first constraint plate disposed opposite to the first main surface of the laminate; a second constraint plate disposed opposite to the second main surface of the laminate; a connecting member for connecting the first constraint plate and the second constraint plate; and a buffer member, the connecting member including... The laminated unit includes a first connecting portion and a second connecting portion arranged in the width direction. It is placed on a mounting platform and forms a cuboid shape. It has a mounting surface opposite to the mounting platform, a top surface spaced apart from the mounting surface in the vertical direction, and a peripheral surface connecting the mounting surface and the top surface. The mounting surface has a first end edge and a second end edge spaced apart from each other in the width direction. The peripheral surface has a first end face and a second end face spaced apart from each other in the width direction. The first end face is formed vertically from the first end edge. The buffer member is disposed on the first end face and protrudes outward from the first end face.

[0006] According to the restraint device disclosed herein, it is possible to suppress the collision between the energy storage module of the stacked body restrained by the restraint device and the restraint device caused by tipping. Attached Figure Description

[0007] Figure 1 This is a three-dimensional schematic diagram showing the laminated body assembly involved in this embodiment.

[0008] Figure 2 This is an exploded perspective view of the laminated assembly involved in this embodiment.

[0009] Figure 3 This is a perspective view of the laminated body assembly involved in the first modified example of this embodiment.

[0010] Figure 4 This is a top view showing the laminated body assembly involved in the second variation of this embodiment. Detailed Implementation

[0011] The embodiments of this disclosure are described in detail below with reference to the accompanying drawings. In the drawings, the same or equivalent parts are given the same reference numerals and their descriptions are not repeated.

[0012] In embodiments of this disclosure, a constraint device 20 for forming a laminate assembly 1, which is a unit of a laminate, will be described. Furthermore, the laminate assembly 1 is one configuration used in the manufacturing process of an energy storage device.

[0013] Figure 1 This is a perspective view showing the laminated assembly involved in this embodiment. Additionally, Figure 1 The stacking direction H indicates the stacking direction of the stack 10, the width direction W indicates the width direction of the stack assembly 1, and the vertical direction V indicates the vertical direction of the stack assembly 1.

[0014] The laminated body assembly 1 is placed on the stage X and is formed into a cuboid shape. The laminated body assembly 1 has a mounting surface 2, a top surface 3, and a first peripheral surface 4.

[0015] The mounting surface 2 is the surface opposite to the mounting platform. The top surface 3 is spaced apart from the mounting surface 2 in the vertical direction V. The mounting surface 2 has a first end edge 6a and a second end edge 6b. The first end edge 6a and the second end edge 6b are spaced apart from each other in the width direction W. A first peripheral surface 4 connects the outer peripheral edge of the mounting surface 2 and the outer peripheral edge of the top surface 3. The first peripheral surface 4 has a first end surface 5a and a second end surface 5b, which are spaced apart from each other in the width direction W. The first end surface 5a is formed vertically from the first end edge 6a in the vertical direction V. The second end surface 5b is formed vertically from the second end edge 6b in the vertical direction V.

[0016] The stacked body assembly is an example of the "stacked body unit" of this disclosure. The first perimeter 4 is an example of the "perimeter" of this disclosure.

[0017] The laminate assembly 1 includes a constraint device 20, a laminate 10, and elastic sheets 17 and 18 (see reference). Figure 2The restraint device 20 clamps the elastic sheets 17 and 18 in the middle and restrains the laminate 10.

[0018] Figure 2 An exploded perspective view of the laminate assembly is shown. The laminate 10 is formed, for example, in a cuboid shape. The laminate 10 has a first main surface 11, a second main surface 12, and a connecting surface 13.

[0019] The first main surface 11 and the second main surface 12 are the two end surfaces of the laminate 10 that are spaced apart in the lamination direction H. In addition, the first main surface 11 is located closer to the first constraint plate 30 than the second main surface 12.

[0020] The connecting surface 13 is the surface that connects the outer peripheral edge of the first main surface 11 and the outer peripheral edge of the second main surface 12. The connecting surface 13 has a third end surface 14a and a fourth end surface 14b. The third end surface 14a and the fourth end surface 14b are spaced apart in the width direction W.

[0021] The laminate 10 includes multiple energy storage modules 15 and multiple interposers 16. Interposers 16 and energy storage modules 15 are alternately stacked in the stacking direction H. Each interposer 16 consists of a conductive plate and two elastomers. The two elastomers sandwich the conductive plate in the middle and are arranged in the stacking direction H. The periphery of each of the two elastomers can be covered with a conductive material. Thus, the energy storage modules 15, sandwiched between interposers 16 and adjacent to each other, achieve conductivity. Alternatively, the interposer 16 adjacent to elastic sheets 17 and 18 can also consist of a single elastomer and a conductive plate. In this case, the conductive plate is adjacent to either elastic sheet 17 or elastic sheet 18.

[0022] Elastic sheets 17 and 18 are respectively disposed on the first main surface 11 and the second main surface 12. When the elastic sheets 17 and 18 are viewed from a position away from the elastic sheets 17 and 18 in the lamination direction H, the elastic sheets 17 and 18 are formed with the same shape as the first main surface 11 of the laminate 10.

[0023] The constraint device 20 includes a first constraint plate 30, a second constraint plate 50, and a connecting member 70. The first constraint plate 30 and the second constraint plate 50 sandwich the laminate 10 in the middle and are spaced apart in the lamination direction H. That is, the first constraint plate 30 sandwiches an elastic sheet 17 in the middle and is positioned opposite the first main surface 11 in the lamination direction H. The second constraint plate 50 sandwiches an elastic sheet 18 in the middle and is positioned opposite the second main surface 12 in the lamination direction H. In addition, since the second constraint plate 50 and the first constraint plate 30 have essentially the same structure, the structure of the first constraint plate 30 will be mainly described below.

[0024] The first constraint plate 30 is a plate-shaped component. When the first constraint plate 30 is viewed from a position away from the first constraint plate 30 in the stacking direction H, the first constraint plate 30 covers the laminate 10.

[0025] The first constraint plate 30 has a first outer surface 36a, a first inner surface 36b, and a second peripheral surface 37. The first outer surface 36a and the first inner surface 36b are spaced apart in the lamination direction H. The first inner surface 36b is located opposite to the first main surface 11. The second peripheral surface 37 connects the first outer surface 36a and the first inner surface 36b. The second peripheral surface 37 has a first end portion 39a and a second end portion 39b. The first end portion 39a and the second end portion 39b are spaced apart in the width direction W. A first cutout portion 33a is formed on the first end portion 39a. A second cutout portion 33b is formed on the second end portion 39b. The first cutout portion 33a and the second cutout portion 33b are spaced apart in the width direction W.

[0026] The first constraint plate 30 includes a thin plate 41, a thin plate 42, and a beam portion 43. Thin plates 41 and 42 respectively cover the beam portion 43. Thin plates 41 and 42 sandwich the beam portion 43 in the middle and are spaced apart in the lamination direction H. Compared with thin plate 41, thin plate 42 is located on the side of the laminate 10 in the lamination direction H.

[0027] The beam portion 43 is formed to extend in the width direction W. The beam portions 43 are arranged at intervals in the vertical direction V such that the first cut-out portion 33a and the second cut-out portion 33b are sandwiched in the middle.

[0028] The second constraint plate 50 has a substantially identical structure to the first constraint plate 30. Like the first constraint plate 30, the second constraint plate 50 has a second outer surface 56a, a second inner surface 56b, and a third peripheral surface 57. The third peripheral surface 57 has a third end 59a and a fourth end 59b. A first cutout 53a is formed on the third end 59a, and a second cutout 53b is formed on the fourth end 59b. When the second constraint plate 50 and the first constraint plate 30 are viewed from a position away from the second constraint plate 50 in the stacking direction H in a top view, the first cutout 53a is positioned overlapping the first cutout 33a, and the second cutout 53b is positioned overlapping the second cutout 33b.

[0029] The second constraint plate 50, like the first constraint plate 30, has a thin plate 61, a thin plate 62, and a beam portion 63. Thin plates 61 and 62 respectively cover the beam portion 63. Thin plates 61 and 62 sandwich the beam portion 63 in the middle and are spaced apart in the lamination direction H. Compared to thin plate 61, thin plate 62 is located on the side of the laminate 10 in the lamination direction H. The beam portion 63 is formed to extend in the width direction W.

[0030] The first end 39a and the third end 59a together form the first end face 5a. The second end 39b and the fourth end 59b together form the second end face 5b.

[0031] The connecting member 70 connects the first constraint plate 30 and the second constraint plate 50 when the laminate 10 is positioned between the first constraint plate 30 and the second constraint plate 50. The connecting member 70 has a first connecting portion 80 and a second connecting portion 90. The first connecting portion 80 and the second connecting portion 90 sandwich the laminate 10 in the middle and are spaced apart in the width direction W. The first connecting portion 80 is located opposite to the third end face 14a, and the second connecting portion 90 is located opposite to the fourth end face 14b.

[0032] The first connecting portion 80 includes a frame 81 and a plurality of column members 84. The frame 81 is formed to extend in the vertical direction V. The frame 81 has an upper frame 82 and a lower frame 83. The upper frame 82 and the lower frame 83 are spaced apart in the stacking direction H. When the upper frame 82 is viewed from a position away from it in the stacking direction H, it appears to extend in the vertical direction V. The upper frame 82 is positioned to connect with the first constraint plate 30. When the lower frame 83 is viewed from a position away from it in the stacking direction H, it appears to extend in the vertical direction V. The lower frame 83 is positioned to connect with the second constraint plate 50. The column members 84 are formed to extend in the stacking direction H. The plurality of column members 84 are spaced apart in the vertical direction V. The column component 84 is arranged to pass through the first cutout 33a and the first cutout 53a, and connects the upper frame 82 and the lower frame 83.

[0033] The second connecting portion 90 has a structure substantially the same as that of the first connecting portion 80. That is, the second connecting portion 90 includes a frame 91 and a plurality of column members 94. The frame 91 has an upper frame 92 and a lower frame 93. The column members 94 are arranged to pass through the second cutout portion 33b and the second cutout portion 53b and connect the upper frame 92 and the lower frame 93.

[0034] Refer again Figure 1 The restraint device 20 also includes a buffer member 100. The buffer member 100 is connected to the first end edge 6a and is disposed at a first end 39a forming the first end face 5a and a third end 59a forming the first end face 5a. The buffer member 100 is formed to protrude from the first end face in the width direction W.

[0035] In the above embodiment, the restraint device 20 has a buffer member 100. This prevents collisions with the restraint device 20 caused by the tilting of the laminate assembly 1.

[0036] Reference Figure 1This provides a detailed explanation of the collision suppression effect. Figure 1 The process of the laminated assembly 1 falling from the stage X and tilting is shown. During the falling of the laminated assembly 1 (refer to...), Figure 1 (Upper right part) When the laminated assembly 1 falls from the platform X onto the ground B, it begins to rotate in the rotation direction R with the buffer member 100 as the fulcrum. Subsequently, when the laminated assembly 1 tilts (refer to...), Figure 1 (Lower right portion) Due to rotational motion, the laminate assembly 1 is subjected to an impact load F at point A located on the outer periphery of the first constraint plate 30. The impact load F can be decomposed into a vertical load Fv and a width load Fw using the angle α formed by the ground B and the laminate assembly 1. The angle α is determined by the protrusion t of the buffer member 100. The vertical load Fv refers to the impact load F acting in the vertical direction V, and the width load Fw refers to the impact load F acting in the width direction W. When the width load Fw acts on the laminate assembly 1, inertia acts on the laminate 10, making it possible for the energy storage module 15 to move in the width direction W. As a result, the energy storage module 15 of the laminate 10 may collide with the connecting member 70.

[0037] As shown in this embodiment, since the restraint device 20 has a buffer member 100, the angle α is 0° or more. When the angle α is 0° or more, a portion of the impact load F acts as a vertical load Fv in the vertical direction V. As a result, the width load Fw when the angle α is 0° or more is reduced compared to when the angle α is 0°. Therefore, when the laminate assembly 1 tilts, it is possible to prevent the energy storage module 15 of the laminate 10 from shifting in the width direction W and colliding with the connecting member 70.

[0038] In the above embodiments, an example of a laminated assembly 1 in which the stacking direction H is perpendicular to the vertical direction V is shown, but this disclosure is not limited thereto. For example, the stacking direction H may also be the same as the vertical direction V.

[0039] like Figure 3As shown, in the first modified example, when the stacking direction H and the vertical direction V are the same, the laminate assembly 1 is placed on a mounting platform. The laminate assembly 1 has a mounting surface 2, a top surface 3, and a first peripheral surface 4. The mounting surface 2 and the top surface 3 are spaced apart in the vertical direction V, which is the same as the stacking direction H. The mounting surface 2 has a first end edge 6a and a second end edge 6b, which are spaced apart in the width direction W. The first peripheral surface 4 connects the outer peripheral edge of the mounting surface 2 and the outer peripheral edge of the top surface 3. The first peripheral surface 4 has a first end surface 5a and a second end surface 5b, which are spaced apart from each other in the width direction W. The first end surface 5a is formed vertically from the first end edge 6a in the vertical direction V, and the second end surface 5b is formed vertically from the second end edge 6b in the vertical direction V.

[0040] The buffer member 100 is connected to the first end edge 6a and disposed at the third end 59a forming the first end face 5a. The buffer member 100 is formed to protrude from the first end face 5a in the width direction W.

[0041] In the above embodiments, an example is shown where the buffer member 100 is formed to protrude from the first end face 5a in the width direction W, but this disclosure is not limited thereto. For example, the restraint device 20 may also not have the buffer member 100. Furthermore, as... Figure 4 As shown, in the second variation, the first connecting portion 80 and the second connecting portion 90 can also be formed to protrude in the width direction W. More specifically, in the first connecting portion 80, when the upper frame 82 and the lower frame 83 are viewed from a position away from the stacking direction H in a top view, the upper frame 82 can protrude in the width direction W in an arc shape from the first end face 5a, and the lower frame 83 can also protrude in the width direction W in an arc shape from the first end face 5a. The same applies to the second connecting portion 90. Thus, as Figure 4 As shown, when the laminated assembly 1 tilts, it can reduce the impact load acting on the laminated assembly 1.

[0042] In the above embodiments, an example is shown where the restraint device 20 forms a laminate assembly 1 as a laminate unit, but this disclosure is not limited thereto. For example, the restraint device 20 may also form an energy storage device as a laminate unit. The energy storage device may be used, for example, as a battery for a PHEV (Plug-in Hybrid Electric Vehicle), BEV (Battery Electric Vehicle), or FCEV (Fuel Cell Electric Vehicle). The interlayer 16 forming the laminate 10 in the energy storage device may be a cooling device or a conductive plate. The energy storage device as a laminate unit may also not have the elastic sheets 17 and 18. Apart from the above, the energy storage device has substantially the same structure as the laminate assembly 1.

[0043] The embodiments disclosed herein are illustrative in all respects and are not intended to be limiting. The scope of this disclosure is not limited by the description of the embodiments above, but by the claims, and is intended to include all modifications falling within the meaning of the claims and their equivalents.

Claims

1. A constraint device, which together with a laminated body forms a laminated body unit, characterized in that, The constraint device constrains the stack comprising a plurality of energy storage modules arranged in the stacking direction. The laminate includes a first main surface and a second main surface spaced apart from the first main surface in the lamination direction. The restraint device includes: A first constraint plate is disposed at a position opposite to the first main surface of the laminate; The second constraint plate is positioned opposite to the second main surface of the laminate. Connecting components for connecting the first constraint plate and the second constraint plate; and Buffer components, The connecting component includes a first connecting portion and a second connecting portion arranged in the width direction. The laminated unit is placed on a mounting platform and formed into a cuboid shape, having a mounting surface opposite to the mounting platform, a top surface spaced apart from the mounting surface in the vertical direction, and a peripheral surface connecting the mounting surface and the top surface. The mounting surface has a first end edge and a second end edge that are spaced apart from each other in the width direction. The circumferential surface has a first end face and a second end face that are spaced apart from each other in the width direction. The first end face is formed vertically from the first end edge. The buffer component is disposed on the first end face and protrudes outward from the first end face.

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