Energy storage devices and vehicles

Abstract

To provide an electricity storage device, in which a pressure release valve and a respiration film are provided in a case, which can suppress an adverse effect due to spark or smoke from an electricity storage stack from occurring.SOLUTION: An electricity storage device 100 comprises an electricity storage module 20 including an electricity storage stack 21, a case 10 including an upper cover 1, a pressure release valve 30, a respiration film 40 and a shield plate 61 (a first shield plate). The upper cover 1 is provided at a position overlapping with the electricity storage stack 21 in a Z-direction (a vertical direction) and has a raised part 3 raised upward. The pressure release valve 30 and the respiration film 40 are respectively provided on the raised part 3. The shield plate 61 is arranged between the raised part 3 and the electricity storage stack 21.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present disclosure relates to a power storage device and a vehicle.

Background Art

[0002] Japanese Patent Application Laid-Open No. 2020-136072 (Patent Document 1) discloses a battery pack including a plurality of battery stacks and a casing that houses the battery stacks.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Although not described in the above Patent Document 1, a pressure release valve and a breathing membrane may be arranged in the casing. Here, the battery stack may emit sparks when the temperature rises excessively. In this case, it is conceivable that sparks are emitted from the pressure release valve to the outside of the casing, or the breathing membrane is affected by the heat of the sparks and smoke from the battery stack.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide a power storage device and a vehicle capable of suppressing adverse effects caused by sparks and smoke from a power storage stack when a pressure release valve and a breathing membrane are provided in a case.

Means for Solving the Problems

[0006] A first aspect of the present disclosure comprises a storage module including at least one storage stack, a case housing the storage module, a pressure relief valve provided in the case, a breathing membrane, and a first shielding plate housed in the case. The case includes an upper cover provided to cover the storage module from above. The upper cover is provided in a position that overlaps with the at least one storage stack in the vertical direction and has a raised portion that rises upward. The pressure relief valve and the breathing membrane are each provided in the raised portion. The first shielding plate is positioned between the raised portion and the at least one storage stack.

[0007] In the energy storage device according to the first aspect of this disclosure, as described above, the pressure relief valve and the breathing membrane are each provided on the raised portion, and the first shielding plate is positioned between the raised portion and the at least one energy storage stack. As a result, the scattering of sparks from the energy storage stack is prevented by the first shielding plate, thereby suppressing the release of sparks to the outside from the pressure relief valve. In addition, the first shielding plate can suppress sparks and smoke from scattering (being blown) (directly) from the energy storage cell to the breathing membrane. As a result, excessive heating of the breathing membrane due to sparks and smoke can be suppressed. This makes it possible to suppress adverse effects caused by sparks and smoke from the energy storage stack.

[0008] Furthermore, by positioning the pressure relief valve and the breathing membrane on the raised portion, the distance between the energy storage stack and each of the pressure relief valve and breathing membrane can be easily increased. As a result, the scattering of sparks from the energy storage stack to each of the pressure relief valve and breathing membrane can be further suppressed. In addition, the scattering of sparks and smoke from the energy storage stack to the breathing membrane (directly) can be further suppressed.

[0009] The energy storage device relating to the first aspect described above is preferably an energy storage device positioned at the bottom of an electrical device. The energy storage device further comprises a sealing member positioned to seal the gap between the raised portion and the bottom. The sealing member is provided with a ventilation portion. With this configuration, the sealing member can fill the space between the raised portion and the bottom with smoke. As a result, the proportion of oxygen in the space can be reduced. In addition, the provision of a ventilation portion in the sealing member can prevent the pressure in the space from becoming excessively high due to the smoke.

[0010] The energy storage device relating to the first aspect described above preferably includes a second shielding plate different from the first shielding plate. The at least one energy storage stack includes a plurality of energy storage stacks. The plurality of energy storage stacks includes a lower energy storage stack located in the lower stage and an upper energy storage stack located in the upper stage stacked on top of the lower stage. The second shielding plate is provided between the upper energy storage stack and the raised portion. Here, the pressure relief valve and the breathing membrane are each provided in the raised portion that rises upward, and are therefore located in relatively close proximity to the upper energy storage stack. Thus, by configuring it as described above, it is possible to effectively suppress the scattering of sparks to the pressure relief valve and the breathing membrane. Furthermore, it is possible to effectively suppress the direct scattering of smoke from the energy storage stack to the breathing membrane.

[0011] In this case, preferably, the upper cover has a lower covering portion that covers the lower energy storage stack and an upper covering portion that covers the upper energy storage stack. The raised portion is provided on the upper surface of the lower covering portion at a position spaced apart from the upper covering portion. The upper covering portion includes a side surface that covers the upper energy storage stack from the side. The side surface includes a second shielding plate. With this configuration, a part of the upper covering portion can be used as the second shielding plate, thereby suppressing an increase in the number of parts and simplifying the configuration of the energy storage device.

[0012] In the energy storage device relating to the first aspect described above, preferably, the pressure relief valve and the breathing membrane are arranged side by side in a predetermined direction intersecting the vertical direction. The first shielding plate is formed to extend in a predetermined direction so as to cover both the pressure relief valve and the breathing membrane from below. With this configuration, the first shielding plate can further suppress the scattering of sparks from the energy storage stack to the pressure relief valve and the breathing membrane, respectively. In addition, it can further suppress the direct scattering of smoke from the energy storage stack to the breathing membrane.

[0013] The energy storage device relating to the first aspect described above preferably includes at least one energy storage stack, a first energy storage stack and a second energy storage stack arranged in a direction intersecting the vertical direction. The raised portion is provided so as to span the first energy storage stack and the second energy storage stack. With this configuration, the distance between the first energy storage stack and the pressure relief valve and breathing membrane, and the distance between the second energy storage stack and the pressure relief valve and breathing membrane can be made uniform.

[0014] In the energy storage device relating to the first aspect described above, the energy storage module preferably includes a fuse. The fuse is located in a second region spaced apart from a first region where at least one energy storage stack is arranged, when viewed from a position spaced apart from the energy storage module in the vertical direction. With this configuration, it is possible to suppress sparks and smoke generated from the energy storage stack from coming into contact with the fuse. As a result, it is possible to suppress thermal effects on the fuse.

[0015] The vehicle relating to the second aspect of this disclosure comprises a vehicle body and the energy storage device relating to the first aspect described above. This makes it possible to provide a vehicle that can suppress adverse effects caused by sparks and smoke from the energy storage stack.

[0016] In the vehicle according to the second aspect, preferably, the vehicle body includes an underbody. The power storage device is disposed in the underbody and includes a sealing member disposed so as to seal a gap between the raised portion and the underbody. The sealing member is provided with a ventilation portion. With such a configuration, since the ventilation portion is provided in the sealing member, it is possible to suppress the pressure in the space between the underbody and the raised portion from becoming excessively large due to smoke.

Advantages of the Invention

[0017] According to the present disclosure, when the pressure release valve and the breathing film are provided in the case, it is possible to suppress the occurrence of adverse effects caused by sparks and smoke from the power storage stack.

Brief Description of the Drawings

[0018] [Figure 1] It is a diagram showing a configuration of a vehicle equipped with a power storage device according to an embodiment. [Figure 2] It is a perspective view showing a schematic configuration of a power storage device according to an embodiment. [Figure 3] It is a plan view showing a schematic configuration of a power storage device according to an embodiment. [Figure 4] It is a cross-sectional view taken along line IV-IV of FIG. 3. [Figure 5] It is a schematic plan view of a state in which an upper cover of a power storage device according to an embodiment is removed. [Figure 6] It is a cross-sectional view taken along line VI-VI of FIG. 3. [Figure 7] It is a partially enlarged cross-sectional view near a shielding plate according to a first modification of an embodiment. [Figure 8] It is a partially enlarged cross-sectional view near a raised portion according to a second modification of an embodiment.

Modes for Carrying Out the Invention

[0019] Embodiments of the present disclosure will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are denoted by the same reference numerals.

[0020] FIG. 1 is a diagram showing a vehicle 200 equipped with a power storage device 100 according to an embodiment of the present disclosure. The power storage device 100 is a device for storing electric power for driving the vehicle 200. The vehicle 200 includes, for example, a PHEV (Plug-in Hybrid Electric Vehicle), a BEV (Battery Electric Vehicle), or a FCEV (Fuel Cell Electric Vehicle). Note that the vehicle 200 is an example of the "electrical equipment" of the present disclosure.

[0021] The X direction, Y direction, and Z direction shown in this specification are directions orthogonal to each other. For example, the X direction and the Y direction may be the front-rear direction and the left-right direction of the vehicle 200, respectively. Also, the Z direction may be the up-down (vertical) direction. Note that the Y direction is an example of the "predetermined direction" and the "direction intersecting the up-down direction" of the present disclosure. Also, the Z direction is an example of the "up-down direction" of the present disclosure.

[0022] In addition to the power storage device 100, the vehicle 200 includes a vehicle body 210. The vehicle body 210 has an underbody 211. The underbody 211 is provided at the lower part (bottom) of the vehicle body 210. The power storage device 100 is disposed on the underbody 211. Specifically, the power storage device 100 is fixed (fastened) to the underbody 211 below the underbody 211. Note that the underbody 211 is an example of the "bottom" of the present disclosure.

[0023] As shown in FIGS. 2 to 4, the power storage device 100 includes a case 10, a power storage module 20 (see FIG. 3), a pressure release valve 30, a breathing membrane 40, a seal member 50 (see FIG. 3), and a plate-like member 60 (see FIG. 4).

[0024] Figure 2 is a schematic perspective view showing the configuration of the energy storage device 100. For simplicity, the sealing member 50, which will be described later, is not shown in Figure 2.

[0025] As shown in Figure 2, the case 10 includes an upper cover 1 and a lower case 2. The upper cover 1 is positioned on the Z1 side (above) of the lower case 2. The upper cover 1 is provided to cover (lid) the lower case 2 from the Z1 side. When the upper cover 1 is assembled to the lower case 2, the housing space of the case 10 is formed. The energy storage module 20 (see Figure 3) is positioned in the housing space. That is, the upper cover 1 is provided to cover the energy storage module 20 from the Z1 side.

[0026] The upper cover 1 has an upper covering portion 1a and a lower covering portion 1b. The upper covering portion 1a covers the energy storage stack 21a, which will be described later. The lower covering portion 1b covers the energy storage stack 21b, which will be described later. Both the upper cover 1 and the energy storage stack 21, which will be described later, have a two-tier structure.

[0027] The upper covering portion 1a is positioned X2 side of the center of the upper cover 1 in the X direction. The lower covering portion 1b extends in the X direction so as to cover the entire area in the X direction where the upper cover 1 is provided.

[0028] The lower covering portion 1b has an upper surface 1c. The upper surface 1c is a surface that extends so as to intersect (orthogonally) with the Z direction. The upper surface 1c is provided on the X1 side of the upper covering portion 1a.

[0029] The upper cover 1 has a raised portion 3. The raised portion 3 is raised towards the Z1 side. Specifically, the raised portion 3 has a convex shape towards the Z1 side. Figure 2 shows a schematic representation of the raised portion 3.

[0030] The raised portion 3 is provided on the upper surface 1c of the lower covering portion 1b. The raised portion 3 rises from the upper surface 1c of the lower covering portion 1b. The raised portion 3 is positioned at a distance from the upper covering portion 1a. Note that equipment or the like (not shown) may be placed inside the case 10 at the position corresponding to the raised portion 3.

[0031] The pressure relief valve 30 is located in the case 10. The pressure relief valve 30 releases the pressure inside the case 10. The pressure relief valve 30 opens when the pressure inside the case 10 exceeds a standard value. The pressure relief valve 30 is composed of a check valve.

[0032] The breathing membrane 40 is provided in the case 10. The breathing membrane 40 regulates the pressure inside the case 10 by allowing gas to pass between the inside and outside of the case 10.

[0033] The pressure relief valve 30 and the breathing membrane 40 are each provided on the raised portion 3. The pressure relief valve 30 and the breathing membrane 40 are arranged side by side in the Y direction on the raised portion 3. Alternatively, the pressure relief valve 30 and the breathing membrane 40 may be arranged side by side in the X direction on the raised portion 3.

[0034] As shown in Figure 3, the raised portion 3 is positioned to straddle two energy storage stacks 21b (described later) aligned in the X direction. Specifically, the raised portion 3 is positioned such that its central portion 3a in the Y direction and the gap G1 between the two energy storage stacks 21b overlap in the Z direction.

[0035] As shown in Figure 4, the sealing member 50 is positioned to seal the space G2 between the raised portion 3 and the underbody 211. The sealing member 50 is made of, for example, rubber. The sealing member 50 may also be fixed by being fitted into a groove (not shown).

[0036] The upper cover 1 has a shape that conforms to the shape of the underbody 211 of the vehicle 200. The underbody 211 is provided with a recess 211a that corresponds to the raised portion 3. The raised portion 3 fits into the recess 211a of the underbody 211. In other words, the raised portion 3 is housed in the recess 211a.

[0037] Referring again to Figure 3, the sealing member 50 is positioned to surround the raised portion 3 when viewed from the Z1 side. That is, the sealing member 50 is formed in an annular shape when viewed from the Z1 side. The sealing member 50 may also be positioned to overlap, for example, the outer edge of the raised portion 3.

[0038] The sealing member 50 is provided with a ventilation section 51 and a ventilation section 52. The smoke discharged from the energy storage module 20, described later, is discharged outside the case 10 from the pressure relief valve 30 and then passes through the ventilation section 51 and the ventilation section 52, respectively. The ventilation section 51 and the ventilation section 52 are openings (slits) provided in a part of the annular sealing member 50.

[0039] The ventilation section 51 is provided on the Y2 side relative to the raised section 3 (pressure relief valve 30 and breathing membrane 40). The ventilation section 52 is provided on the Y1 side relative to the raised section 3 (pressure relief valve 30 and breathing membrane 40). This makes it possible to suppress the flow of smoke that has passed through ventilation sections 51 and 52 to the front and rear of the vehicle 200.

[0040] The energy storage module 20 includes a plurality of energy storage stacks 21. The plurality of energy storage stacks 21 include a plurality of energy storage stacks 21a arranged in the upper layer and a plurality of energy storage stacks 21b arranged in the lower layer. The upper layer (energy storage stacks 21a) is stacked on top of the lower layer (energy storage stacks 21b). The upper layer (energy storage stacks 21a) is covered by an upper layer covering portion 1a. The lower layer (energy storage stacks 21b) is covered by a lower layer covering portion 1b. Note that energy storage stacks 21a and 21b are examples of the "upper layer energy storage stack" and "lower layer energy storage stack" as described herein.

[0041] The raised portion 3 is positioned to overlap with a portion of the multiple energy storage stacks 21 in the Z direction. Specifically, the raised portion 3 is positioned to overlap with a portion of the multiple energy storage stacks 21b in the Z direction.

[0042] Two energy storage stacks 21 (21a and 21b) are arranged side by side in the Y direction. Three sets of two energy storage stacks 21a arranged in the Y direction are arranged side by side in the X direction in the upper row. Eight sets of two energy storage stacks 21b arranged in the Y direction are arranged side by side in the X direction in the lower row. The number of sets is not limited to the above example. One and the other of the two energy storage stacks 21b arranged in the Y direction are examples of the "first energy storage stack" and "second energy storage stack" of this disclosure, respectively.

[0043] The energy storage module 20 includes a fuse 22. The fuse 22 blows due to a large current flowing through the energy storage module 20. In this case, no current flows through the energy storage module 20.

[0044] The fuse 22 is located in region S2, which is spaced apart from region S1 where multiple energy storage stacks 21 are arranged, when viewed from a position P (see Figure 4) spaced apart from the energy storage module 20 in the Z direction. Region S2 is located on the X1 side of region S1. The fuse 22 is also located in the central part of the energy storage device 100 in the Y direction. Note that the position of the fuse 22 in the Y direction is not limited to the example above. Furthermore, region S1 and region S2 are examples of the "first region" and "second region" of this disclosure, respectively.

[0045] As shown in Figure 4, the plate-shaped member 60 is housed in the case 10. In the Z direction, the plate-shaped member 60 is located between the position where the energy storage stack 21a is placed and the position where the energy storage stack 21b is placed. The plate-shaped member 60 extends in the X direction so as to span multiple energy storage stacks 21b. Busbars (not shown), which are used as electrical wiring within the energy storage module 20, are placed (fixed) to the plate-shaped member 60. The plate-shaped member 60 is made of a metal such as iron.

[0046] In this case, the energy storage stack may emit sparks or smoke if the temperature rises excessively. Specifically, the sparks or smoke are emitted from the safety valve of the energy storage cell. In this case, it is possible that sparks may be emitted from the pressure relief valve to the outside of the case, or that the breathing membrane may be affected by the heat from the sparks or smoke from the energy storage stack.

[0047] Therefore, in this embodiment, the shielding plate 61 is positioned between the raised portion 3 and the multiple energy storage stacks 21 (21b). Specifically, the shielding plate 61 is positioned to overlap with the raised portion 3 in the Z direction. Note that the shielding plate 61 is an example of the "first shielding plate" of this disclosure.

[0048] Figure 5 is a plan view showing the schematic configuration of the plate-shaped member 60. As shown in Figure 5, the shielding plate 61 is integrally formed with the plate-shaped member 60. The plate-shaped member 60 (shielding plate 61) is provided so as to straddle two energy storage stacks 21b aligned in the X direction at each position in the X direction.

[0049] The shielding plate 61 has a width W1 in the Y direction. The portion of the plate-shaped member 60 other than the shielding plate 61 has a width W2. Width W1 is greater than width W2. Note that each of widths W1 and W2 may vary depending on the position in the X direction. In this case, the minimum value of width W1 is greater than the maximum value of width W2.

[0050] As shown in Figure 6, the shielding plate 61 is formed to extend in the Y direction so as to cover both the pressure relief valve 30 and the breathing membrane 40 from the Z2 side. In other words, the shielding plate 61 is formed to be wide in the Y direction. The shielding plate 61 is provided to close the opening 3b of the raised portion 3. The opening 3b is provided at the lower end portion 3c of the raised portion 3. The lower end portion 3c is formed in an annular shape.

[0051] Furthermore, the raised portion 3 has no openings other than the opening 3b. This makes it possible to suppress the smoke generated in the energy storage stack 21 from reaching the pressure relief valve 30 and the breathing membrane 40 of the raised portion 3. As a result, it is possible to reduce the thermal impact on the breathing membrane 40.

[0052] An air gap V is formed in the opening 3b that is not blocked by the shielding plate 61. The air gap V is formed between the outer peripheral edge 61a of the shielding plate 61 and the lower end portion 3c of the raised portion 3. Smoke generated in the energy storage stack 21 passes through the air gap V towards the pressure relief valve 30. The width W3 of the air gap V is smaller than the width W1 of the shielding plate 61 in the Y direction. The width W3 is 1 / 2 or less of the width W1. For example, the width W3 may be 1 / 10 or more of the width W1 and 1 / 8 or less of the width W1. The relationship between the widths W1 and W3 is not limited to the above example.

[0053] Each energy storage stack 21 has a plurality of energy storage cells 21c and a cell case 21d. The plurality of energy storage cells 21c are housed in the cell case 21d. The shielding plate 61 (plate-shaped member 60) is supported from the Z2 side by the cell case 21d. In other words, the shielding plate 61 (plate-shaped member 60) is placed on the cell case 21d. Smoke from each energy storage cell 21c is discharged, for example, from an exhaust valve (not shown) provided on the upper part (upper end surface) of the cell case 21d. Note that the number of energy storage cells 21c housed in the cell case 21d may be 1. In this embodiment, within the cell case 21d, a plurality of energy storage cells 21c having a longitudinal direction in the X direction are arranged in the Y direction. Note that within the cell case 21d, a plurality of energy storage cells having a longitudinal direction in the Y direction may be arranged in the X direction.

[0054] The raised portion 3 has a base portion 3d and a cap portion 3e. The base portion 3d is formed continuously with the portion of the upper cover 1 adjacent to the raised portion 3 (the portion surrounding the raised portion 3). The base portion 3d is formed to protrude toward the Z1 side. Note that the configuration of the raised portion 3 is not limited to the above example. For example, the cap portion 3e may not be provided on the raised portion.

[0055] The cap portion 3e is placed on the base portion 3d. The cap portion 3e is fixed to the upper end portion 3f of the base portion 3d. The upper end portion 3f of the base portion 3d is provided with a projection 3g that protrudes toward Z1. The cap portion 3e includes a flange portion 3i in which a hole portion 3h is provided. The cap portion 3e is fixed (engaged) to the base portion 3d by inserting the projection portion 3g into the hole portion 3h. Note that each of the projection portion 3g and the hole portion 3h may be formed in an annular shape, for example. Also, multiple projection portions 3g (multiple holes portion 3h) may be arranged circumferentially.

[0056] The cap portion 3e is formed to be convex toward the Z1 side. The pressure relief valve 30 and the breathing membrane 40 are each provided on the cap portion 3e. Specifically, the pressure relief valve 30 and the breathing membrane 40 are each provided on the upper end of the cap portion 3e.

[0057] Referring again to Figure 4, the upper covering portion 1a includes a side surface 1d that covers the energy storage stack 21a from the side. Specifically, the side surface 1d covers the energy storage stack 21a from the X1 side (the side of the raised portion 3). Note that the side surface 1d is an example of the "second shielding plate" of this disclosure.

[0058] Side surface 1d is provided between the energy storage stack 21a and the raised portion 3. Specifically, side surface 1d is provided between the energy storage stack 21a closest to X1 (towards the raised portion 3) and the raised portion 3. Side surface 1d is provided so as to follow the cell case 21d (see Figure 6) of the energy storage stack 21a.

[0059] The side surface 1d extends in the Z direction from near the position where the lower end portion 3c (see Figure 6) of the raised portion 3 is provided to above the position where the upper end portion of the energy storage stack 21a is provided.

[0060] As described above, in the energy storage device 100 of this embodiment, the shielding plate 61 is positioned between the raised portion 3 and the energy storage stack 21b. This allows the space between the energy storage stack 21b and the raised portion 3 to be divided by the shielding plate 61. As a result, it is possible to suppress sparks generated in the energy storage stack 21b from scattering above the shielding plate 61. This prevents sparks from scattering to the pressure relief valve 30 and the breathing membrane 40. In addition, the shielding plate 61 can obstruct the flow of smoke from the energy storage stack 21b.

[0061] Furthermore, in this embodiment, the sealing member 50 that seals the space G2 between the raised portion 3 and the underbody 211 is provided with ventilation portions (51, 52). As a result, the sealing member 50 fills the space G2 with smoke from the energy storage stack 21, thereby reducing the oxygen content in the space G2. In addition, since the smoke is discharged from the ventilation portions (51, 52), the pressure in the space G2 can be kept below a certain value.

[0062] Furthermore, in this embodiment, the upper covering portion 1a includes a side surface 1d that covers the energy storage stack 21a from the side. This prevents sparks and smoke from scattering from the energy storage stack 21a by the side surface 1d. As a result, it is possible to suppress sparks generated in the energy storage stack 21a from reaching the raised portion 3. It is also possible to suppress smoke from scattering directly from the energy storage stack 21a to the raised portion 3.

[0063] In the above embodiment, an example was shown in which the side surface 1d of the upper cover 1 is provided between the raised portion 3 and the energy storage stack 21a, but the disclosure is not limited thereto. As shown in Figure 7, the pressure relief valve 30 and the breathing membrane 40 may each be provided on the side surface 11d of the upper cover 11 of the case 110. The side surface 11d is formed to rise towards the Z1 side. Note that the side surface 11d is an example of the "raised portion" in this disclosure.

[0064] The upper cover 11 is provided with a shielding plate 111. The shielding plate 111 is located inside the case 110. The shielding plate 111 is located between the energy storage stack 21a furthest to X1 (side 11d side) of the multiple energy storage stacks 21a and side 11d. Side 11d is provided so as to be aligned with the energy storage stack 21a furthest to X1. The shielding plate 111 is provided so as to extend in the Z direction. The shielding plate 111 may be integrally formed with the upper cover 11. Alternatively, the shielding plate 111 may be separate from the upper cover 11 and fixed to the upper cover 11. The shielding plate 111 is an example of the "second shielding plate" of this disclosure.

[0065] In the above embodiment, an example was shown in which a plurality of energy storage stacks 21 are provided in the energy storage module 20, but the disclosure is not limited thereto. The number of energy storage stacks provided in the energy storage module may be one.

[0066] In the above embodiment, an example is shown in which a sealing member 50 is provided to seal the space G2 between the underbody 211 and the raised portion 3, but the disclosure is not limited thereto. The sealing member 50 may not be provided.

[0067] In the above embodiment, an example is shown in which the sealing member 50 is provided with ventilation portions (51, 52), but the disclosure is not limited thereto. The sealing member does not need to be provided with ventilation portions. Alternatively, ventilation portions may be formed by providing through holes in the sealing member.

[0068] In the above embodiment, an example was shown in which the ventilation portions (51, 52) of the sealing member 50 are provided on the Y1 side and Y2 side of the pressure relief valve 30 and the breathing membrane 40, respectively, but the disclosure is not limited thereto. The ventilation portions may be provided on only one of the Y1 side and Y2 side of the pressure relief valve 30 and the breathing membrane 40. Alternatively, the ventilation portions may be provided on at least one of the X1 side and X2 side of the pressure relief valve 30 and the breathing membrane 40.

[0069] In the above embodiment, an example was shown in which the pressure relief valve 30 and the breathing membrane 40 are each provided on the same raised portion 3, but the disclosure is not limited thereto. The pressure relief valve 30 and the breathing membrane 40 may be provided on different raised portions.

[0070] In the above embodiment, an example was shown in which the energy storage device 100 is located on the underbody 211 of the vehicle 200, but the disclosure is not limited thereto. The energy storage device 100 may also be located on the bottom of electrical equipment other than a vehicle (for example, a stationary energy storage device).

[0071] In the above embodiment, an example was shown in which the energy storage module 20 includes an upper energy storage stack 21a and a lower energy storage stack 21b, but the disclosure is not limited thereto. The energy storage module does not have to include an upper energy storage stack.

[0072] In the above embodiment, an example was shown in which the width W2 of the shielding plate 61 is greater than the width W1 of the portion of the plate-shaped member 60 other than the shielding plate 61, but the disclosure is not limited to this. For example, the width W2 may be equal to the width W1.

[0073] In the above embodiment, an example was shown in which the shielding plate 61 is part of the plate-shaped member 60, but the disclosure is not limited thereto. The shielding plate 61 may be a separate entity from the plate-shaped member 60.

[0074] In the above embodiment, an example was shown in which the raised portion 3 is arranged to straddle two energy storage stacks 21b aligned in the Y direction, but the disclosure is not limited thereto. The raised portion 3 may be arranged to overlap in the Z direction with only one of the two energy storage stacks 21b.

[0075] In the above embodiment, an example was shown in which the region S1 where the energy storage stack 21 is provided and the region S2 where the fuse 22 is provided are spaced apart, but the disclosure is not limited to this. For example, region S1 and region S2 may overlap in the Z direction. Also, in a plan view, region S1 and region S2 may be adjacent.

[0076] In the above embodiment, an example was shown in which the pressure relief valve 30 and the breathing membrane 40 are provided separately, but the disclosure is not limited thereto. The pressure relief valve may be provided integrally with the breathing membrane. In the example shown in Figure 8, a single member 35 that integrally has the functions of the pressure relief valve 30 and the breathing membrane 40 is provided on the cap portion 3e. The member 35 is an example of the "pressure relief valve" and "breathing membrane" of this disclosure.

[0077] In the above embodiment, an example was shown in which two energy storage stacks 21 are arranged side by side in the Y direction, but the disclosure is not limited thereto. The energy storage stacks 21 do not have to be arranged side by side in the Y direction. Also, three or more energy storage stacks 21 may be arranged side by side in the Y direction.

[0078] In the above embodiment, an example was shown in which the raised portion 3 is provided on the lower covering portion 1b, but the disclosure is not limited thereto. The raised portion 3 may also be provided on the upper covering portion 1a.

[0079] Furthermore, the configurations of the above embodiments and the various modified examples may be combined with each other.

[0080] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of this disclosure is indicated by the claims rather than by the description of the embodiments above, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of Symbols]

[0081] 1,11 Upper cover, 1a Upper covering section, 1b Lower covering section, 1c Top surface, 1d Side surface (second shielding plate), 3 Raised section, 10,110 Case, 11d Side surface (raised section), 20 Energy storage module, 21 Energy storage stack, 21a Energy storage stack (upper energy storage stack), 21b Energy storage stack (lower energy storage stack), 22 Fuse, 30 Pressure relief valve, 35 Component (pressure relief valve) (breathing membrane), 40 Breathing membrane, 50 Seal component, 51,52 Ventilation section, 61 Shielding plate (first shielding plate), 100 Energy storage device, 111 Shielding plate (second shielding plate), 200 Vehicle (electrical equipment), 211 Underbody (bottom), P Position, S1 Area (first area), S2 Area (second area), Y Direction (predetermined direction) (direction intersecting the vertical direction), Z direction (vertical direction).

Claims

1. A battery storage module including at least one battery storage stack, A case for housing the aforementioned energy storage module, A pressure relief valve provided in the aforementioned case, The respiratory membrane, The case comprises a first shielding plate housed within the aforementioned case, The case includes an upper cover provided to cover the energy storage module from above. The upper cover is provided in a position that overlaps with at least one of the energy storage stacks in the vertical direction, and has a raised portion that rises upward. The pressure relief valve and the breathing membrane are each provided on the raised portion, The first shielding plate is positioned between the raised portion and the at least one energy storage stack in the energy storage device.

2. The energy storage device is located at the bottom of the electrical equipment, The system further comprises a sealing member arranged to seal the gap between the raised portion and the bottom portion, The energy storage device according to claim 1, wherein the sealing member is provided with a ventilation portion.

3. The system includes a second shielding plate that is different from the first shielding plate, The aforementioned at least one energy storage stack includes a plurality of energy storage stacks, The aforementioned multiple energy storage stacks are The lower energy storage stack is located in the lower section, Includes an upper energy storage stack arranged in the upper layer stacked on the lower layer, The energy storage device according to claim 1 or 2, wherein the second shielding plate is provided between the upper energy storage stack and the raised portion.

4. The aforementioned upper cover is The lower covering portion covers the lower energy storage stack, It has an upper covering portion that covers the upper energy storage stack, The aforementioned raised portion is provided on the upper surface of the lower covering portion at a position separated from the upper covering portion. The upper covering portion includes a side surface that covers the upper energy storage stack from the side, The energy storage device according to claim 3, wherein the aforementioned side surface includes the second shielding plate.

5. The pressure relief valve and the breathing membrane are arranged in a predetermined direction intersecting the vertical direction. The energy storage device according to claim 1 or 2, wherein the first shielding plate is formed to extend in the predetermined direction so as to cover both the pressure relief valve and the breathing membrane from below.

6. The at least one energy storage stack includes a first energy storage stack and a second energy storage stack arranged in a direction intersecting the vertical direction, The energy storage device according to claim 1 or 2, wherein the raised portion is provided so as to span the first energy storage stack and the second energy storage stack.

7. The aforementioned energy storage module includes a fuse, The energy storage device according to claim 1 or 2, wherein the fuse is located in a second region spaced apart from a first region where at least one energy storage stack is arranged, when viewed from a position spaced apart from the energy storage module in the vertical direction.

8. The car body and A vehicle comprising the energy storage device described in claim 1 or 2.

9. The vehicle body includes the underbody, The aforementioned energy storage device is It is located in the aforementioned underbody, Includes a sealing member arranged to seal the gap between the raised portion and the underbody, The vehicle according to claim 8, wherein the sealing member is provided with a ventilation portion.

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