Electricity storage device and vehicle

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 technology]

[0002] Japanese Patent Application Laid-Open Publication 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] Japanese Patent Publication No. 2020-136072 Summary of the Invention [Problem to be solved by the invention]

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

[0005] The present disclosure has been made to solve the above-mentioned problems, and its purpose is to provide an energy storage device and a vehicle that can suppress the adverse effects caused by sparks and smoke from the energy storage stack when a pressure release valve and a breathing membrane are provided in the case. [Means for solving the problem]

[0006] A power storage device according to a first aspect of the present disclosure includes a power storage module including at least one power storage stack, a case that houses the power storage module, a pressure release valve provided in the case, a breather membrane, and a first shielding plate housed in the case. The case includes an upper cover that covers the power storage module from above. The upper cover is provided at a position that overlaps with the at least one power storage stack in the vertical direction and has a raised portion that protrudes upward. The pressure release valve and the breather membrane are each provided on the raised portion. The first shielding plate is disposed between the raised portion and the at least one power storage stack.

[0007] In the energy storage device according to the first aspect of the present disclosure, as described above, the pressure release valve and the breathing membrane are each provided on the raised portion, and a first shielding plate is disposed between the raised portion and the at least one energy storage stack. This prevents sparks from scattering from the energy storage stack by the first shielding plate, thereby preventing sparks from escaping to the outside from the pressure release valve. Furthermore, the first shielding plate prevents sparks and smoke from scattering (directly) onto the breathing membrane from the energy storage cells. As a result, excessive heating of the breathing membrane due to sparks and smoke can be prevented. This reduces adverse effects caused by sparks and smoke from the energy storage stack.

[0008] Furthermore, by providing the pressure release valve and the breathing membrane on the raised portion, the distance between the power storage stack and the pressure release valve and the breathing membrane can be easily increased. As a result, it is possible to further prevent sparks from the power storage stack from flying to the pressure release valve and the breathing membrane. It is also possible to further prevent sparks and smoke from flying (directly) from the power storage stack to the breathing membrane.

[0009] The power storage device according to the first aspect is preferably a power storage device disposed at the bottom of the electrical equipment. The power storage device further includes a sealing member disposed to seal a 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. Furthermore, the ventilation portion provided in the sealing member can prevent the pressure in the space from becoming excessively high due to smoke.

[0010] The power storage device according to the first aspect preferably includes a second shielding plate different from the first shielding plate. The at least one power storage stack includes a plurality of power storage stacks. The plurality of power storage stacks include a lower-stage power storage stack disposed in a lower tier and an upper-stage power storage stack disposed in an upper tier stacked on the lower tier. The second shielding plate is provided between the upper-stage power storage stack and the raised portion. Here, the pressure release valve and the breathing membrane are each provided on the raised portion that rises upward, and are therefore provided relatively close to the upper-stage power storage stack. Thus, by configuring as described above, it is possible to effectively prevent sparks from flying to each of the pressure release valve and the breathing membrane. It is also possible to effectively prevent smoke from flying directly from the power storage stack to the breathing membrane.

[0011] In this case, the upper cover preferably has a lower covering portion that covers the lower power storage stack and an upper covering portion that covers the upper power storage stack. The raised portion is provided on an 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 power storage stack from the side. The side surface includes a second shielding plate. With this configuration, a portion 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 power storage device.

[0012] In the power storage device according to the first aspect, the pressure release valve and the breathing membrane are preferably arranged side by side in a predetermined direction intersecting the up-down direction. The first shielding plate is formed to extend in the predetermined direction so as to cover both the pressure release valve and the breathing membrane from below. With this configuration, the first shielding plate can further prevent sparks from the power storage stack from scattering onto the pressure release valve and the breathing membrane. Also, the first shielding plate can further prevent smoke from scattering directly from the power storage stack onto the breathing membrane.

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

[0014] In the energy storage device according to the first aspect, the energy storage module preferably includes a fuse. The fuse is arranged in a second region spaced apart from a first region in which at least one energy storage stack is arranged, when the energy storage module is viewed from a position spaced apart from the energy storage module in the vertical direction. This configuration can prevent sparks or smoke generated from the energy storage stack from coming into contact with the fuse. As a result, thermal effects on the fuse can be suppressed.

[0015] A vehicle according to a second aspect of the present disclosure includes a vehicle body and the power storage device according to the first aspect, thereby providing a vehicle that can suppress adverse effects caused by sparks and smoke from the power storage stack.

[0016] In the vehicle according to the second aspect, the vehicle body preferably includes an underbody. The power storage device is disposed in the underbody and includes a sealing member disposed to seal a gap between the raised portion and the underbody. The sealing member is provided with a vent. With this configuration, the provision of the vent in the sealing member can prevent the pressure in the space between the underbody and the raised portion from becoming excessively large due to smoke. [Effects of the Invention]

[0017] According to the present disclosure, when a pressure release valve and a breathing membrane are provided in the case, adverse effects caused by sparks and smoke from the power storage stack can be suppressed. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a diagram showing a configuration of a vehicle equipped with a power storage device according to an embodiment; [Figure 2] 1 is a perspective view showing a schematic configuration of an electricity storage device according to an embodiment; [Figure 3] 1 is a plan view showing a schematic configuration of an electricity storage device according to an embodiment. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] 1 is a schematic plan view of an electricity storage device according to an embodiment with an upper cover removed; [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] FIG. 10 is a partially enlarged cross-sectional view of the vicinity of a shielding plate according to a first modified example of the embodiment. [Figure 8] FIG. 10 is a partially enlarged cross-sectional view of the vicinity of a raised portion according to a second modified example of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The present disclosure will be described with reference to the accompanying drawings, in which the same or corresponding elements are designated by the same reference numerals.

[0020] 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 plug-in hybrid electric vehicle (PHEV), a battery electric vehicle (BEV), or a fuel cell electric vehicle (FCEV). The vehicle 200 is an example of an "electrical device" in the present disclosure.

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

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

[0023] As shown in Figures 2 to 4, the energy storage device 100 includes a case 10, an energy storage module 20 (see Figure 3), a pressure release valve 30, a breathing membrane 40, a sealing member 50 (see Figure 3), and a plate-shaped member 60 (see Figure 4).

[0024] Fig. 2 is a perspective view that schematically shows the configuration of the electricity storage device 100. For simplicity, a sealing member 50, which will be described later, is not shown in Fig. 2.

[0025] As shown in FIG. 2, the case 10 includes an upper cover 1 and a lower case 2. The upper cover 1 is disposed on the Z1 side (above) of the lower case 2. The upper cover 1 is provided so as to cover (lid) the lower case 2 from the Z1 side. When the upper cover 1 is assembled to the lower case 2, an accommodation space for the case 10 is formed. The power storage module 20 (see FIG. 3) is disposed in the accommodation space. That is, the upper cover 1 is provided so as to cover the power 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 a power storage stack 21a (described later). The lower covering portion 1b covers a power storage stack 21b (described later). The upper cover 1 and the power storage stack 21 (described later) each have a two-stage structure.

[0027] The upper covering portion 1a is disposed on the X2 side of the X-direction center of the upper cover 1. The lower covering portion 1b extends in the X-direction so as to cover the entire range in the X-direction in which 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 (be perpendicular to) 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 toward the Z1 side. Specifically, the raised portion 3 has a convex shape toward the Z1 side. Note that the raised portion 3 is illustrated schematically in FIG. 2.

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

[0031] The pressure release valve 30 is provided in the case 10. The pressure release valve 30 releases the pressure inside the case 10. The pressure release valve 30 opens when the pressure inside the case 10 reaches or exceeds a reference value. The pressure release valve 30 is configured as a check valve.

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

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

[0034] 3, the raised portion 3 is arranged so as to straddle two power storage stacks 21b (described later) lined up in the X direction. Specifically, the raised portion 3 is arranged so that a center portion 3a of the raised portion 3 in the Y direction and a gap G1 between the two power storage stacks 21b overlap in the Z direction.

[0035] 4, the seal member 50 is disposed so as to seal the space G2 between the raised portion 3 and the underbody 211. The seal member 50 is formed of, for example, rubber. The seal member 50 may be fixed by being fitted into a groove (not shown).

[0036] The upper cover 1 has a shape that follows the shape of an 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] 3, the sealing member 50 is disposed so as 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 disposed so as to overlap, for example, the outer peripheral edge of the raised portion 3.

[0038] The sealing member 50 is provided with a ventilation section 51 and a ventilation section 52. Smoke emitted from the power storage module 20 (described later) is discharged to the outside of the case 10 through the pressure release valve 30, and then passes through each of the ventilation sections 51 and 52. Note that each of the ventilation sections 51 and 52 is an opening (slit) provided in a part of the annular sealing member 50.

[0039] The ventilation section 51 is provided on the Y2 side of the raised section 3 (the pressure release valve 30 and the breathing membrane 40). The ventilation section 52 is provided on the Y1 side of the raised section 3 (the pressure release valve 30 and the breathing membrane 40). This makes it possible to prevent smoke that has passed through each of the ventilation sections 51 and 52 from flowing forward and backward of the vehicle 200.

[0040] The power storage module 20 includes a plurality of power storage stacks 21. The plurality of power storage stacks 21 include a plurality of power storage stacks 21a arranged in an upper tier and a plurality of power storage stacks 21b arranged in a lower tier. The upper tier (power storage stack 21a) is stacked on the lower tier (power storage stack 21b). The upper tier (power storage stack 21a) is covered by an upper tier covering portion 1a. The lower tier (power storage stack 21b) is covered by a lower tier covering portion 1b. The power storage stack 21a and the power storage stack 21b are examples of the "upper tier power storage stack" and the "lower tier power storage stack" of the present disclosure, respectively.

[0041] The raised portion 3 is disposed at a position overlapping in the Z direction with some of the plurality of power storage stacks 21. Specifically, the raised portion 3 is disposed at a position overlapping in the Z direction with some of the plurality of power storage stacks 21b.

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

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

[0044] When viewing the energy storage module 20 from a position P (see FIG. 4) spaced apart from the energy storage module 20 in the Z direction, the fuse 22 is arranged in an area S2 spaced apart from an area S1 in which a plurality of energy storage stacks 21 are arranged. The area S2 is arranged on the X1 side of the area S1. The fuse 22 is also arranged in the center of the energy storage device 100 in the Y direction. The arrangement position of the fuse 22 in the Y direction is not limited to the above example. The area S1 and the area S2 are examples of the "first area" and the "second area" of the present disclosure, respectively.

[0045] As shown in Fig. 4, the plate-shaped member 60 is housed in the case 10. The plate-shaped member 60 is located in the Z direction between the position where the power storage stack 21a is arranged and the position where the power storage stack 21b is arranged. The plate-shaped member 60 extends in the X direction so as to span the multiple power storage stacks 21b. A bus bar (not shown) used as electrical wiring within the power storage module 20 is arranged (fixed) on the plate-shaped member 60. The plate-shaped member 60 is made of a metal such as iron.

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

[0047] Therefore, in this embodiment, the shielding plate 61 is disposed between the raised portion 3 and the plurality of power storage stacks 21 (21b). Specifically, the shielding plate 61 is disposed at a position overlapping the raised portion 3 in the Z direction. The shielding plate 61 is an example of a "first shielding plate" in the present disclosure.

[0048] Fig. 5 is a plan view showing a schematic configuration of the plate-shaped member 60. As shown in Fig. 5, the shielding plate 61 is formed integrally with the plate-shaped member 60. The plate-shaped member 60 (shielding plate 61) is provided at each position in the X direction so as to straddle two power storage stacks 21b arranged side by side 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. The width W1 is larger than the width W2. Note that the widths W1 and W2 may each vary depending on the position in the X direction. In this case, the minimum value of the width W1 is larger than the maximum value of the width W2.

[0050] 6, the shielding plate 61 is formed to extend in the Y direction so as to cover both the pressure release 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 so as to close the opening 3b of the raised portion 3. The opening 3b is provided at the lower end 3c of the raised portion 3. The lower end 3c is formed in an annular shape.

[0051] The protruding portion 3 has no openings other than the opening 3b. This makes it possible to prevent smoke generated in the electricity storage stack 21 from reaching the pressure release valve 30 and the breathing film 40 of the protruding portion 3. As a result, it is possible to reduce the thermal impact on the breathing film 40.

[0052] A gap V that is not blocked by the shielding plate 61 is formed in the opening 3b. The gap V is formed between the outer peripheral edge 61a of the shielding plate 61 and the lower end 3c of the raised portion 3. Smoke generated in the electricity storage stack 21 passes through the gap V toward the pressure release valve 30. The width W3 of the gap V is smaller than the width W1 of the shielding plate 61 in the Y direction. The width W3 is ½ or less of the width W1. For example, the width W3 may be 1 / 10 or more and 1 / 8 or less of the width W1. The relationship between the width W1 and the width 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. A shielding plate 61 (plate-shaped member 60) is supported by the cell case 21d from the Z2 side. 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. The number of energy storage cells 21c housed in the cell case 21d may be one. In this embodiment, a plurality of energy storage cells 21c having a longitudinal direction in the X direction are arranged in the Y direction in the cell case 21d. In addition, a plurality of energy storage cells having a longitudinal direction in the Y direction may also be arranged in the X direction in the cell case 21d.

[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 raised portion does not necessarily need to have a cap portion 3e.

[0055] The cap portion 3e is placed on the base portion 3d. The cap portion 3e is fixed to an upper end portion 3f of the base portion 3d. A protrusion 3g that protrudes toward the Z1 side is provided on the upper end portion 3f of the base portion 3d. The cap portion 3e includes a flange portion 3i in which a hole portion 3h is provided. The protrusion 3g is inserted into the hole portion 3h, thereby fixing (engaging) the cap portion 3e to the base portion 3d. Note that each of the protrusion portion 3g and the hole portion 3h may be formed in an annular shape, for example. Furthermore, multiple protrusions 3g (multiple hole portions 3h) may be arranged circumferentially.

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

[0057] 4 again, the upper covering portion 1a includes a side surface 1d that covers the power storage stack 21a from the side. Specifically, the side surface 1d covers the power storage stack 21a from the X1 side (the side of the raised portion 3). The side surface 1d is an example of a "second shielding plate" in the present disclosure.

[0058] The side surface 1d is provided between the power storage stack 21a and the raised portion 3. Specifically, the side surface 1d is provided between the power storage stack 21a closest to the X1 side (the raised portion 3 side) among the multiple power storage stacks 21a and the raised portion 3. The side surface 1d is provided so as to fit along the cell case 21d (see FIG. 6) of the power storage stack 21a.

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

[0060] As described above, in the energy storage device 100 of this embodiment, the shielding plate 61 is disposed 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, sparks generated in the energy storage stack 21b can be prevented from scattering above the shielding plate 61. This allows the sparks to be prevented from scattering toward the pressure release valve 30 and the breathing membrane 40. In addition, the shielding plate 61 can prevent smoke from escaping from the energy storage stack 21b.

[0061] 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 parts (51, 52). As a result, the sealing member 50 fills the space G2 with smoke from the electricity storage stack 21, thereby reducing the proportion of oxygen in the space G2. Furthermore, the smoke is exhausted from the ventilation parts (51, 52), so the pressure in the space G2 can be kept at or below a certain value.

[0062] Furthermore, in this embodiment, the upper covering portion 1a includes a side surface 1d that covers the power storage stack 21a from the side. This allows the side surface 1d to prevent sparks and smoke from scattering from the power storage stack 21a. As a result, sparks generated in the power storage stack 21a can be prevented from reaching the protruding portion 3. Also, it is possible to prevent smoke from scattering directly from the power storage stack 21a to the protruding portion 3.

[0063] In the above embodiment, an example has been described in which the side surface 1d of the upper cover 1 is provided between the raised portion 3 and the power storage stack 21a, but the present disclosure is not limited to this. As shown in FIG. 7, the pressure release 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 so as to bulge toward the Z1 side. The side surface 11d is an example of a "raised portion" in the present disclosure.

[0064] A shielding plate 111 is provided on the upper cover 11. The shielding plate 111 is provided inside the case 110. The shielding plate 111 is provided between the power storage stack 21a that is closest to the X1 side (side surface 11d) among the multiple power storage stacks 21a and the side surface 11d. The side surface 11d is provided so as to follow the power storage stack 21a that is closest to the X1 side. The shielding plate 111 is provided so as to extend in the Z direction. The shielding plate 111 may be formed integrally 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 a "second shielding plate" in the present disclosure.

[0065] In the above embodiment, an example has been shown in which a plurality of power storage stacks 21 are provided in the power storage module 20, but the present disclosure is not limited to this. The number of power storage stacks provided in the power storage module may be one.

[0066] In the above embodiment, an example has been described in which the seal member 50 is provided to seal the space G2 between the underbody 211 and the raised portion 3, but the present disclosure is not limited to this. The seal member 50 does not necessarily have to be provided.

[0067] In the above embodiment, an example was shown in which the vents (51, 52) were provided in the seal member 50, but the present disclosure is not limited to this. The seal member does not necessarily have to be provided with vents. Alternatively, the vents may be formed by providing through holes in the seal member.

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

[0069] In the above embodiment, an example has been shown in which the pressure release valve 30 and the breathing membrane 40 are provided on the same raised portion 3, but the present disclosure is not limited to this. The pressure release valve 30 and the breathing membrane 40 may be provided on different raised portions.

[0070] In the above embodiment, an example has been described in which the power storage device 100 is disposed on the underbody 211 of the vehicle 200, but the present disclosure is not limited to this. The power storage device 100 may also be disposed on the bottom of an electrical device other than a vehicle (for example, a stationary power storage device).

[0071] In the above embodiment, an example has been described in which the power storage module 20 includes the upper power storage stack 21a and the lower power storage stack 21b, but the present disclosure is not limited to this. The power storage module does not necessarily have to include the upper power storage stack.

[0072] In the above embodiment, an example was shown in which the width W2 of the shielding plate 61 was larger than the width W1 of the portion of the plate-shaped member 60 other than the shielding plate 61, but the present 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 was part of the plate-shaped member 60, but the present disclosure is not limited to this. The shielding plate 61 may be a separate member from the plate-shaped member 60.

[0074] In the above embodiment, an example has been shown in which the raised portion 3 is arranged to straddle two power storage stacks 21b arranged side by side in the Y direction, but the present disclosure is not limited to this. The raised portion 3 may be arranged to overlap only one of the two power storage stacks 21b in the Z direction.

[0075] In the above embodiment, an example has been described in which the region S1 where the power storage stack 21 is provided and the region S2 where the fuse 22 is provided are spaced apart, but the present disclosure is not limited to this. For example, the region S1 and the region S2 may overlap in the Z direction. Furthermore, the region S1 and the region S2 may be adjacent to each other in a plan view.

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

[0077] In the above embodiment, an example has been shown in which two power storage stacks 21 are arranged side by side in the Y direction, but the present disclosure is not limited to this. The power storage stacks 21 do not have to be arranged side by side in the Y direction. Furthermore, three or more power storage stacks 21 may be arranged side by side in the Y direction.

[0078] In the above embodiment, an example in which the raised portion 3 is provided on the lower covering portion 1b has been described, but the present disclosure is not limited to this. The raised portion 3 may also be provided on the upper covering portion 1a.

[0079] The configurations of the above-described embodiment and the various modified examples may be combined with each other.

[0080] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present disclosure is defined by the claims, not by the description of the above embodiments, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0081] 1, 11 upper cover, 1a upper covering portion, 1b lower covering portion, 1c upper surface, 1d side surface (second shielding plate), 3 raised portion, 10, 110 case, 11d side surface (raised portion), 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 release valve, 35 member (pressure release valve) (breathing membrane), 40 breathing membrane, 50 sealing member, 51, 52 ventilation portion, 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 with the up / down direction), Z direction (up / down direction).

Claims

1. a power storage module including at least one power storage stack; a case that houses the power storage module; a pressure release valve provided in the case; Respiratory membrane and a first shielding plate housed in the case, the case includes an upper cover provided to cover the power storage module from above, the upper cover is provided at a position overlapping with the at least one power storage stack in the vertical direction and has a raised portion that protrudes upward; the pressure relief valve and the breathing membrane are each provided on the raised portion; The first shielding plate is disposed between the protrusion and the at least one power storage stack.

2. The power storage device is disposed at the bottom of an electrical device, a sealing member disposed to seal a gap between the raised portion and the bottom; The power storage device according to claim 1 , wherein the sealing member is provided with a ventilation portion.

3. a second shielding plate different from the first shielding plate; the at least one power storage stack includes a plurality of power storage stacks; The plurality of power storage stacks include: a lower storage stack disposed in a lower position; an upper-stage power storage stack disposed in an upper stage stacked on the lower stage, The energy storage device according to claim 1 , wherein the second shielding plate is provided between the upper energy storage stack and the raised portion.

4. The upper cover is a lower covering portion that covers the lower power storage stack; an upper covering portion that covers the upper power 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 power storage stack from a side, The power storage device according to claim 3 , wherein the side surface includes the second shielding plate.

5. the pressure release valve and the breathing membrane are arranged side by side in a predetermined direction intersecting the up-down direction, The power storage device according to claim 1 , wherein the first shielding plate is formed to extend in the predetermined direction so as to cover both the pressure release valve and the breathing membrane from below.

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

7. the storage module includes a fuse; 3. The energy storage device according to claim 1, wherein the fuse is arranged in a second region spaced apart from a first region in which the at least one energy storage stack is arranged, when the energy storage module is viewed from a position spaced apart from the energy storage module in the vertical direction.

8. The car body and A vehicle comprising the power storage device according to claim 1 or 2.

9. The vehicle body includes an underbody, The power storage device is Located in the underbody, a sealing member disposed to seal a gap between the raised portion and the underbody; The vehicle according to claim 8 , wherein the seal member is provided with a ventilation portion.

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