power storage device

Abstract

The utility model relates to a power storage device, in the power storage device, multiple power storage units are arranged in the first direction. Multiple buffer portions are arranged on the multiple power storage units. Each of the multiple power storage units has an upper surface portion facing upward. The upper surface portion has a first end edge and a second end edge. The first end edge and the second end edge extend along the horizontal direction and along the second direction orthogonal to the first direction. The multiple buffer portions are isolated from each other on the upper surface portions of the multiple power storage units and are arranged on at least one of the first end edge and the second end edge of each of the multiple power storage units.

Description

Technical Field

[0001] This disclosure relates to energy storage devices. Background Technology

[0002] Japanese Patent Application Publication No. 2020-142589 discloses a battery pack located on the lower side of the floor panel. Utility Model Content

[0003] The structure of an energy storage device that can improve the energy density of an energy storage device mounted in a vehicle was studied. For example, an energy storage device positioned as close as possible to the floor panel below it was also studied, with the energy storage device itself becoming part of the floor panel. However, when the energy storage device is designed as described above, loads from the inside of the vehicle interior, i.e., from above, may be input from above the energy storage device.

[0004] This disclosure is made in view of the aforementioned problems, and its purpose is to provide a highly rigid energy storage device for input from loads above.

[0005] The energy storage device according to a certain aspect of this disclosure can be mounted on a vehicle. The energy storage device includes a plurality of energy storage units and a plurality of buffer portions. The plurality of energy storage units are arranged in a first direction along a horizontal direction. The plurality of buffer portions are disposed on the plurality of energy storage units. Each of the plurality of energy storage units has an upward-facing upper surface portion. The upper surface portion has a first end edge and a second end edge. The first end edge is an end edge on one side in the first direction. The second end edge is an end edge on the other side in the first direction. The first end edge and the second end edge extend along a horizontal direction and along a second direction orthogonal to the first direction. The plurality of buffer portions are isolated from each other on the upper surface portions of the plurality of energy storage units and are disposed on at least one of the first end edge and the second end edge of each of the plurality of energy storage units.

[0006] In a certain aspect of the energy storage device according to the present disclosure, it is preferred that a plurality of buffer portions are isolated from each other on the upper surface portions of a plurality of energy storage units and are disposed on both sides of the first end edge and the second end edge of each plurality of energy storage units.

[0007] In an energy storage device according to a certain aspect of the present disclosure, it is preferred that the buffer sections, which are located in different energy storage units and are adjacent to each other in the first direction, are connected to each other.

[0008] The energy storage device according to a certain aspect of this disclosure preferably further includes a plate-shaped portion. The plate-shaped portion is arranged to cover multiple buffer portions. The multiple buffer portions are integrally formed with the plate-shaped portion.

[0009] The energy storage device according to a certain aspect of this disclosure preferably further comprises an elastic member. The elastic member is disposed on the upper surface of at least one of the plurality of energy storage units, with multiple buffer portions disposed between each other.

[0010] The energy storage device according to a certain aspect of this disclosure preferably also includes a package. The package houses multiple energy storage units provided with multiple buffer sections. The package can be fixed to the vehicle body. The multiple buffer sections are integrally formed with the package.

[0011] The energy storage device according to a certain aspect of this disclosure preferably further comprises a plurality of spacers. The plurality of spacers are respectively disposed between adjacent energy storage cells in a plurality of energy storage cells. The plurality of spacers and the plurality of buffer sections are each integrally formed.

[0012] In a certain aspect of the energy storage device according to this disclosure, it is preferred that each of the plurality of energy storage units includes an electrode body and an energy storage unit housing. The energy storage unit housing houses the electrode body. A plurality of buffer portions are integrally formed with the energy storage unit housing by bending the respective energy storage unit housing of the plurality of energy storage units convexly outward.

[0013] The above and other objects, features, aspects and advantages of this invention will become apparent from the following detailed description of the invention, which is understood in conjunction with the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a schematic diagram showing a vehicle equipped with an energy storage device according to Embodiment 1 of the present disclosure.

[0015] Figure 2 This is a schematic perspective view showing the body of a vehicle equipped with the energy storage device of Embodiment 1 of the present disclosure.

[0016] Figure 3 It is Figure 1 A schematic cross-sectional view of a portion of the vehicle as viewed from the direction of the arrow along line III-III.

[0017] Figure 4 This is a top view showing the energy storage device of Embodiment 1 of this disclosure together with the crossbeam of the vehicle body.

[0018] Figure 5 This is an exploded perspective view showing the energy storage device according to Embodiment 1 of this disclosure.

[0019] Figure 6 It is Figure 4 A cross-sectional view of the energy storage device as viewed from the direction of the arrow along line VI-VI.

[0020] Figure 7 This is a schematic cross-sectional view of the energy storage module.

[0021] Figure 8 It is Figure 4 A cross-sectional view of the energy storage device as viewed from the direction of the arrow along line VIII-VIII.

[0022] Figure 9 This is a cross-sectional view of an energy storage device showing a variation of Embodiment 1 of the present disclosure.

[0023] Figure 10 This is a partial cross-sectional view showing the energy storage device according to Embodiment 2 of this disclosure.

[0024] Figure 11 This is a partial cross-sectional view showing the energy storage device according to Embodiment 3 of this disclosure.

[0025] Figure 12 This is a cross-sectional view showing the energy storage device according to Embodiment 4 of this disclosure.

[0026] Figure 13 This is a cross-sectional view of an energy storage device showing a variation of Embodiment 4 of the present disclosure.

[0027] Figure 14 This is a partial cross-sectional view showing the energy storage device according to Embodiment 5 of this disclosure.

[0028] Figure 15 This is a partial cross-sectional view showing the energy storage device according to Embodiment 6 of this disclosure. Detailed Implementation

[0029] Hereinafter, the energy storage devices of various embodiments of the present disclosure will be described with reference to the accompanying drawings. The same or equivalent parts in the drawings will be labeled with the same reference numerals, and their descriptions will not be repeated.

[0030] (Implementation Method 1)

[0031] Figure 1 This is a schematic diagram showing a vehicle equipped with the energy storage device according to Embodiment 1 of this disclosure. Figure 1 As shown, the energy storage device 10 of Embodiment 1 of this disclosure is an energy storage device that can be mounted on a vehicle 1. First, the vehicle 1 will be described.

[0032] The vehicle 1 in Embodiment 1 is, for example, an electric vehicle such as an electric car or a hybrid vehicle that can be driven by a motor. Figure 2 This is a schematic perspective view showing the body of a vehicle equipped with the energy storage device of Embodiment 1 of the present disclosure. Figure 3 It is Figure 1 A schematic cross-sectional view of a portion of the vehicle as viewed from the direction of the arrow along line III-III. (See image.) Figures 1-3 As shown, the vehicle 1 of Embodiment 1 of this disclosure includes an energy storage device 10 and a vehicle body 2 on which the energy storage device 10 is fixed. The longitudinal direction of the vehicle 1 or the vehicle body 2 is parallel to the first direction D1 described later in the energy storage device 10.

[0033] The vehicle body 2 includes multiple crossbeams 3, a left sill 4a, a right sill 4b, a left longitudinal beam 5a, and a right longitudinal beam 5b as the skeleton components of the vehicle 1.

[0034] Multiple crossbeams 3 extend in the left-right direction of the vehicle body 2. The left-right direction or width direction of the vehicle 1 or vehicle body 2 is parallel to the second direction D2 described later in the energy storage device 10. The multiple crossbeams 3 are arranged relative to each other in the first direction D1. The vehicle body 2 may include only a single crossbeam 3.

[0035] The left sill 4a is located on the left side of the vehicle 1 in the left-right direction. The left sill 4a extends in the front-rear direction of the vehicle 1. The right sill 4b is located on the right side of the vehicle 1 in the left-right direction. The right sill 4b extends in the front-rear direction of the vehicle 1. Multiple crossbeams 3 each extend from the inside of the left sill 4a to the inside of the right sill 4b.

[0036] The left longitudinal beam 5a is located on the left side of the vehicle 1 in the left-right direction. The left longitudinal beam 5a extends in the front-rear direction of the vehicle. The left longitudinal beam 5a is located closer to the center of the vehicle in the width direction than the left sill 4a. The right longitudinal beam 5b is located on the right side of the vehicle 1 in the left-right direction. The right longitudinal beam 5b is located closer to the center of the vehicle in the width direction than the right sill 4b.

[0037] Next, the details of the energy storage device 10 according to Embodiment 1 of this disclosure will be described. Figure 4 This is a top view showing the energy storage device of Embodiment 1 of this disclosure together with the crossbeam of the vehicle body.

[0038] like Figure 3 as well as Figure 4 As shown, the energy storage device 10 includes multiple energy storage modules 50. The multiple energy storage modules 50 are arranged below the crossbeam 3.

[0039] Multiple energy storage modules 50 each extend in a first direction D1. The first direction D1 is a horizontal direction. When viewed from the vertical direction Z, each of the multiple energy storage modules 50 is arranged to intersect at least one crossbeam 3. When viewed from the vertical direction Z, each of the multiple energy storage modules 50 is arranged to intersect multiple crossbeams 3. The multiple energy storage modules 50 are arranged in a second direction D2. The second direction D2 is a horizontal direction. The second direction D2 is orthogonal to the first direction D1. In this embodiment, the multiple energy storage modules 50 are arranged only in the second direction D2.

[0040] Furthermore, the energy storage device 10 may have at least one energy storage module 50. Alternatively, the energy storage device 10 may have only one energy storage module 50. Multiple energy storage modules 50 may also be arranged in the first direction D1. Multiple energy storage modules 50 may also be arranged in both the first direction D1 and the second direction D2. Multiple energy storage modules 50 may also be arranged only in the first direction D1.

[0041] Next, the details of the energy storage module 50 will be explained. Figure 5 This is an exploded perspective view showing the energy storage device according to Embodiment 1 of this disclosure. Figure 6 It is Figure 4 A cross-sectional view of the energy storage device as viewed from the direction of the arrow along line VI-VI. Figure 7 This is a schematic cross-sectional view of the energy storage module. Figure 7 In, with Figure 6 The same sectional view is illustrated. Figure 8 It is Figure 4 A cross-sectional view of the energy storage device as viewed from the direction of the arrow along line VIII-VIII.

[0042] like Figures 5-8 As shown, each of the multiple energy storage modules 50 has multiple energy storage units 100 and multiple buffer sections 200 (see reference). Figure 8 ), and plate-like portion 300.

[0043] Each of the multiple energy storage units 100 is, for example, a non-aqueous electrolyte secondary battery such as a lithium-ion secondary battery. The multiple energy storage units 100 are arranged in the first direction D1.

[0044] Each of the plurality of energy storage units 100 has an upward-facing upper surface portion 101. The upper surface portion 101 has a first end edge 102 and a second end edge 103. The first end edge 102 is the end edge on one side in a first direction D1. The second end edge 103 is the end edge on the other side in the first direction D1. The first end edge 102 and the second end edge 103 extend along a horizontal direction and along a second direction D2 orthogonal to the first direction D1.

[0045] Each of the plurality of energy storage units 100 further includes a first end portion 104, a second end portion 105, a bottom portion 106, a first side portion 107, and a second side portion 108. The first end portion 104 extends downward from the first end edge 102. The second end portion 105 extends downward from the second end edge 103. The bottom portion 106 is located on the side opposite to the upper surface portion 101. The bottom portion 106 is connected to the first end portion 104 and the second end portion 105.

[0046] The first side portion 107 faces one of the second directions D2. The second side portion 108 faces the other of the second directions D2. The first side portion 107 and the second side portion 108 are connected to the upper surface portion 101, the first end portion 104, the second end portion 105, and the bottom portion 106.

[0047] Each of the multiple energy storage units 100 includes an electrode body 110 and an energy storage unit housing 120. The electrode body 110 includes a positive electrode layer, a negative electrode layer, and a separator (not shown). The separator is located between the positive electrode layer and the negative electrode layer. The positive electrode layer and the negative electrode layer can be stacked in the first direction D1 with the separator in between. The positive electrode layer and the negative electrode layer can also be wound in the second direction D2 with the separator in between.

[0048] The energy storage unit housing 120 houses the electrode body 110. The energy storage unit housing 120 may be made of a metal such as aluminum or an aluminum alloy. The energy storage unit housing 120 forms at least a portion of each of an upper surface portion 101, a first end portion 104, a second end portion 105, and a bottom portion 106. At least the energy storage unit housing 120 forms a first end edge 102 and a second end edge 103. The energy storage unit housing 120 has a so-called angular shape.

[0049] In the energy storage unit housing 120, the first end edge 102 and the second end edge 103 can be welded to the first end face 104 and the second end face 105 respectively. The first end edge 102 and the second end edge 103 can be formed by bending the energy storage unit housing 120.

[0050] Multiple buffer sections 200 are disposed on multiple energy storage units 100. The multiple buffer sections 200 are isolated from each other on the upper surface portion 101 of the multiple energy storage units 100 and are disposed on at least one of the first end edge 102 and the second end edge 103 of each of the multiple energy storage units 100. The multiple buffer sections 200 are isolated from each other on the upper surface portion 101 of the multiple energy storage units 100 and are disposed on both the first end edge 102 and the second end edge 103 of each of the multiple energy storage units 100. Buffer sections 200 disposed on different energy storage units 100 and adjacent to each other in the first direction D1 are connected to each other. The materials constituting the multiple buffer sections 200 will be described later.

[0051] The plate-shaped portion 300 is provided to cover multiple buffer portions 200. The plate-shaped portion 300 has a uniform thickness. The plate-shaped portion 300 extends in the horizontal direction. The plate-shaped portion 300 extends in the first direction D1. When viewed from the vertical direction Z, the plate-shaped portion 300 intersects with multiple crossbeams 3. The plate-shaped portion 300 is isolated from multiple energy storage units 100. Examples of plate-shaped portions 300 include surface pressure dispersion plates. The materials constituting the plate-shaped portion 300 will be described later.

[0052] In this embodiment, a plurality of buffer portions 200 are integrally formed with the plate-shaped portion 300. The plurality of buffer portions 200 protrude downward from the plate-shaped portion 300.

[0053] The energy storage device 10 also includes a package 400. The package 400 houses multiple energy storage units 100 with multiple buffer sections 200 and plate-shaped sections 300. That is, the package 400 houses multiple energy storage modules 50. The package 400 can be fixed to the vehicle body 2 of the vehicle 1. Specifically, the package 400 is configured as a skeleton member that can be fixed to the vehicle body 2 of the vehicle 1.

[0054] like Figure 3 As shown, in the vehicle 1 of this embodiment, one end of the package 400 in the second direction D2 is fixed to the left longitudinal beam 5a by a first fastening connection member 6a such as a bolt. The other end of the package 400 in the second direction D2 is fixed to the right longitudinal beam 5b by a second fastening connection member 6b such as a bolt.

[0055] Furthermore, one end of the package 400 in the second direction D2 can also be fixed to the left threshold 4a. The other end of the package 400 in the second direction D2 can also be fixed to the right threshold 4b.

[0056] like Figure 3 as well as Figure 4 As shown, the package 400 is positioned below the plurality of crossbeams 3. The package 400 extends in the first direction D1. When viewed from the vertical direction Z, the package 400 is arranged to intersect with the plurality of crossbeams 3. The package 400 also functions as a floor component defining the interior of the vehicle.

[0057] like Figure 5 as well as Figure 6 As shown, the packaging 400 includes an upper plate portion 410, a lower plate portion 420, and a peripheral wall portion 430. The upper plate portion 410 is positioned above the plurality of plate-shaped portions 300. The lower plate portion 420 is positioned below the energy storage modules 50. The peripheral wall portion 430 extends downward from the outer peripheral end of the upper plate portion 410. The peripheral wall portion 430 extends horizontally in a manner that surrounds the plurality of energy storage modules 50. The peripheral wall portion 430 is connected to the lower plate portion 420.

[0058] Here, the materials constituting the plurality of buffer portions 200 and the plate-shaped portion 300 will be described. In this embodiment, the plurality of buffer portions 200 and the plate-shaped portion 300 are made of a material with higher rigidity than the upper plate portion 410.

[0059] The specific materials constituting the plurality of buffer sections 200 and plate-shaped sections 300 are not particularly limited. The plurality of buffer sections 200 and plate-shaped sections 300 are preferably, for example, resin components. The heat resistance temperature of this resin component is preferably higher than that of the material constituting the upper plate section 410. The thermal conductivity of this resin component is preferably lower than that of the material constituting the upper plate section 410. By using such a material, it is possible to suppress the temperature rise inside the vehicle compartment when the energy storage module 50 abnormally heats up.

[0060] The resin component constituting the plurality of buffer portions 200 and the plate-shaped portion 300 may comprise a thermosetting resin. The resin component may be made of glass fiber reinforced plastic. The resin component may comprise a foamed resin. The foamed resin preferably has a heat resistance temperature of 400°C or higher.

[0061] The energy storage device 10 may also include multiple constraint members 510 in each of the multiple energy storage modules 50. The multiple constraint members 510 extend from one side to the other in a first direction D1 of the energy storage module 50. The multiple constraint members 510 apply a load to the multiple energy storage cells 100 in the first direction D1. The multiple constraint members 510 fix the relative positions of the multiple energy storage cells 100 to each other. The multiple constraint members 510 respectively cover the four corners of each of the multiple energy storage cells 100 when viewed from the first direction D1.

[0062] In this embodiment, the energy storage device 10 may further include a first adhesive 520 in each of the plurality of energy storage modules 50. The first adhesive 520 is disposed between the upper plate portion 410 and the plate-shaped portion 300. The first adhesive 520 joins the upper plate portion 410 and the plate-shaped portion 300. As a result, the plate-shaped portion 300 can suppress deformation of the upper plate portion 410.

[0063] The energy storage device 10 may also include a cooling plate 530. The cooling plate 530 is disposed below the plurality of energy storage modules 50. The cooling plate 530 may also be disposed above the plurality of energy storage modules 50. Inside the cooling plate 530, a flow circuit (not shown) is formed for the flow of refrigerant such as air and coolant.

[0064] The energy storage device 10 may further include a tray 540. The tray 540 is disposed below the plurality of energy storage modules 50. The energy storage device 10 may also include a second adhesive 550 in each of the plurality of energy storage modules 50. The second adhesive 550 is disposed between the plurality of energy storage units 100 and the tray 540. The second adhesive 550 engages the plurality of energy storage units 100 with the tray 540.

[0065] In addition, such as Figure 8As shown, for ease of explanation, the multiple energy storage units 100 are illustrated as being isolated from each other, but the multiple energy storage units 100 may also be closely connected to each other in the first direction D1. Other components such as spacers may also exist between the multiple energy storage units 100.

[0066] Figure 9 This is a cross-sectional view of an energy storage device illustrating a variation of Embodiment 1 of this disclosure. Figure 9 In the following figures, the diagrams illustrate the relationship with... Figure 8 The sectional view shown is the same as that in Embodiment 1. Figure 9 As shown, the energy storage device 10a may also include multiple spacers 600 in each of the multiple energy storage modules 50. The multiple spacers 600 are respectively disposed between adjacent energy storage cells 100 in the multiple energy storage units 100. The multiple spacers 600 are formed of resin, for example. The ends of each spacer 600 may be disposed between buffer portions 200 that are disposed in different energy storage cells 100 and adjacent in the first direction D1.

[0067] As described above, the energy storage device 10 of Embodiment 1 of this disclosure can be mounted on a vehicle 1. The energy storage device 10 includes a plurality of energy storage units 100 and a plurality of buffer portions 200. The plurality of energy storage units 100 are arranged in a first direction D1 along the horizontal direction. The plurality of buffer portions 200 are disposed on the plurality of energy storage units 100. Each of the plurality of energy storage units 100 has an upper surface portion 101 facing upward. The upper surface portion 101 has a first end edge 102 and a second end edge 103. The first end edge 102 is an end edge on one side in the first direction D1. The second end edge 103 is an end edge on the other side in the first direction D1. The first end edge 102 and the second end edge 103 extend along the horizontal direction and along a second direction D2 orthogonal to the first direction D1. Multiple buffer sections 200 are isolated from each other on the upper surface portion 101 of multiple energy storage units 100 and are disposed on at least one of the first end edge 102 and the second end edge 103 of each of the multiple energy storage units 100.

[0068] According to the above configuration, a load input from above the energy storage device 10 can be transmitted via the buffer portion 200 to at least one of the first end edge 102 and the second end edge 103, which have higher rigidity, in the upper surface portion 101 of the energy storage unit 100. Therefore, the rigidity of the energy storage device 10 can be improved in response to load input from above.

[0069] In addition, in Embodiment 1, a plurality of buffer portions 200 are isolated from each other on the upper surface portion 101 of a plurality of energy storage units 100 and are disposed on both sides of the first end edge 102 and the second end edge 103 of each plurality of energy storage units 100.

[0070] According to the above configuration, a load input from above the energy storage device 10 can be transmitted to both the first end edge 102 and the second end edge 103 via the buffer section 200. Therefore, the rigidity of the energy storage device 10 in response to load input from above can be further improved.

[0071] In addition, in Embodiment 1, the buffer sections 200 that are disposed in different energy storage units 100 and are adjacent to each other in the first direction D1 are connected to each other.

[0072] According to the above configuration, it is possible to suppress the input of load between the first end edge 102 and the second end edge 103 of each energy storage unit 100 and further improve the rigidity of the buffer section 200.

[0073] In addition, the energy storage device 10 of Embodiment 1 also includes a plate-shaped portion 300. The plate-shaped portion 300 is provided to cover a plurality of buffer portions 200. The plurality of buffer portions 200 are integrally formed with the plate-shaped portion 300.

[0074] According to the above configuration, the load input from above the plate-shaped portion 300 is more reliably input to the first end edge 102 and the second end edge 103 of each energy storage unit 100 via the plate-shaped portion 300 and the plurality of buffer portions 200. Therefore, the rigidity of the energy storage device 10 for load input from above can be improved more reliably.

[0075] (Implementation Method 2)

[0076] Next, the energy storage device according to Embodiment 2 of this disclosure will be described. The main difference between the energy storage device of Embodiment 2 of this disclosure and the energy storage device 10 of Embodiment 1 of this disclosure is that it has an elastic member. Furthermore, the same configuration and effects as those of the energy storage device 10 of Embodiment 1 of this disclosure will not be described again.

[0077] Figure 10 This is a partial cross-sectional view showing the energy storage device according to Embodiment 2 of this disclosure. (As shown...) Figure 10 As shown, the energy storage device 10b also includes a plurality of elastic members 700 in each of the plurality of energy storage modules 50. The elastic members 700 are arranged between the plurality of buffer portions 200 on the upper surface portion 101 of at least one of the plurality of energy storage units 100.

[0078] According to the above configuration, when a load is input to the upper surface portion 101 from the buffer portions 200 via the elastic member 700, the elastic member 700 deforms, which can suppress the local input of load to the upper surface portion 101.

[0079] Multiple elastic members 700 can each be disposed on the upper surface of the multiple energy storage units 100 at the gaps between the multiple buffer portions 200.

[0080] (Implementation Method 3)

[0081] Next, the energy storage device according to Embodiment 3 of this disclosure will be described. The configuration of the buffer section of the energy storage device according to Embodiment 3 of this disclosure is different from that of the energy storage device 10 according to Embodiment 1 of this disclosure. Furthermore, the configuration and effects that are the same as those of the energy storage device 10 according to Embodiment 1 of this disclosure will not be described again.

[0082] Figure 11 This is a partial cross-sectional view showing the energy storage device according to Embodiment 3 of this disclosure. Figure 11 As shown, in the energy storage device 10c of Embodiment 3, a plurality of buffer sections 200 are integrally formed with the packaging 400c.

[0083] According to the above configuration, the load input from above the packaging 400c is more reliably input to the first end edge 102 and the second end edge 103 of each energy storage unit 100 via the packaging 400c and the multiple buffer sections 200. Furthermore, in the vertical direction, no other components are required between the buffer section 200 and the packaging 400c. Therefore, the energy storage device 10 can be made thinner, and the rigidity of the energy storage device 10 in response to load input from above can be improved more reliably.

[0084] Specifically, multiple cushioning sections 200 are integrally formed with the upper plate section 410 of the packaging 400c. The multiple cushioning sections 200 protrude downward from the upper plate section 410 of the packaging 400c.

[0085] (Implementation Method 4)

[0086] Next, the energy storage device according to Embodiment 4 of this disclosure will be described. The configuration of the buffer section of the energy storage device according to Embodiment 4 of this disclosure is different from that of the energy storage device 10a in the modified example of Embodiment 1 of this disclosure. Furthermore, the same configuration and effects as those of the energy storage device 10a in the modified example of Embodiment 1 of this disclosure will not be described again.

[0087] Figure 12 This is a cross-sectional view showing the energy storage device according to Embodiment 4 of the present disclosure. In the energy storage device 10d of Embodiment 4, a plurality of spacers 600d and a plurality of buffer portions 200 are integrally formed.

[0088] According to the above configuration, in the energy storage device 10 having multiple spacers 600d, it is possible to suppress the situation where the number of components increases in order to provide multiple buffer sections 200.

[0089] Multiple buffer portions 200 extend along the first direction D1 from both sides of each of the multiple spacers 600d. Furthermore, in embodiment 4, the plate-shaped portion 300d is composed of components separate from the multiple buffer portions 200. However, the plate-shaped portion 300d may also be integrally formed with the multiple buffer portions 200.

[0090] Figure 13 This is a cross-sectional view of an energy storage device illustrating a variation of Embodiment 4 of this disclosure. (See attached image.) Figure 13 As shown, each of the multiple buffer sections 200da can extend only on one side of the multiple spacers 600da in their respective first direction D1.

[0091] (Implementation Method 5)

[0092] Finally, the energy storage device of Embodiment 5 of this disclosure will be described. The configuration of the buffer section of the energy storage device of Embodiment 5 of this disclosure is different from that of the energy storage device 10 of Embodiment 1 of this disclosure. Furthermore, the configuration and effects that are the same as those of the energy storage device 10 of Embodiment 1 of this disclosure will not be described again.

[0093] Figure 14 This is a partial cross-sectional view showing the energy storage device according to Embodiment 5 of this disclosure. Figure 14 As shown, in the energy storage device 10e of embodiment 5, a plurality of buffer portions 200e are integrally formed with the energy storage unit housing 120e by bending the respective energy storage unit housing 120e of the plurality of energy storage units 100 in a convex shape toward the outside.

[0094] According to the above configuration, in the energy storage device 10, it is possible to suppress the situation where the number of components increases in order to provide multiple buffer sections 200.

[0095] Furthermore, in embodiment 5, the plate-shaped portion 300 is composed of components from a plurality of buffer portions 200e.

[0096] Furthermore, the bending shape of the energy storage unit housing 120e is not limited to Figure 14 The shape shown. Figure 15 This is a partial cross-sectional view showing the energy storage device according to Embodiment 6 of this disclosure. (As shown) Figure 15 As shown, each of the plurality of energy storage units 100 may further have a convex portion 121ea formed by bending a portion of the upper surface portion 101 of the energy storage unit housing 120ea outward in a convex shape. The convex portion 121ea is in contact with the plate-like portion 300.

[0097] In the above description of the embodiments, the components that can be combined can also be combined with each other.

[0098] Embodiments of this utility model have been described, but it should be considered that the embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of this utility model is defined by the claims and is intended to include all modifications within the scope and equivalent meaning of the claims.

Claims

1. An energy storage device, capable of being mounted on a vehicle, characterized in that, The energy storage device includes: Multiple energy storage units are arranged in a first direction along the horizontal direction; and Multiple buffer sections are configured on the multiple energy storage units. Each of the plurality of energy storage units has an upper surface portion facing upwards. The upper surface portion has a first end edge as one side in the first direction and a second end edge as the other side. The first end edge and the second end edge extend along the horizontal direction and along a second direction orthogonal to the first direction. The plurality of buffer portions are isolated from each other on the upper surface portion of the plurality of energy storage units and are disposed on at least one of the first end edge and the second end edge of each of the plurality of energy storage units.

2. The energy storage device according to claim 1, characterized in that, The plurality of buffer portions are isolated from each other on the upper surface portion of the plurality of energy storage units and are disposed on both sides of the first end edge and the second end edge of each of the plurality of energy storage units.

3. The energy storage device according to claim 1, characterized in that, The buffer sections, which are located in different energy storage units and are adjacent to each other in the first direction, are connected to each other.

4. The energy storage device according to claim 1, characterized in that, The energy storage device also includes a plate-shaped portion, which is arranged to cover the plurality of buffer portions. The plurality of buffer sections are integrally formed with the plate-shaped section.

5. The energy storage device according to claim 2, characterized in that, The energy storage device further includes an elastic member disposed on the upper surface of at least one of the plurality of energy storage units, between the plurality of buffer portions.

6. The energy storage device according to any one of claims 1 to 5, characterized in that, The energy storage device also includes a package that houses the plurality of energy storage units, which are provided with the plurality of buffer sections, and can be fixed to the vehicle body. The plurality of buffer sections are integrally formed with the packaging.

7. The energy storage device according to any one of claims 1 to 5, characterized in that, The energy storage device also includes a plurality of spacers, which are respectively disposed between adjacent energy storage units in the plurality of energy storage cells. The plurality of spacers and the plurality of buffer sections are each integrally formed.

8. The energy storage device according to any one of claims 1 to 5, characterized in that, Each of the plurality of energy storage units includes an electrode body and an energy storage unit housing that houses the electrode body. The plurality of buffer sections are integrally formed with the energy storage unit housing by bending the housing of each of the plurality of energy storage units outward in a convex shape.

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