Electricity storage device and vehicle

Abstract

The utility model relates to an electric power storage device and a vehicle. The electric power storage device comprises an electric power storage module containing an electric power storage stacking body, a shell containing an upper cover, a pressure relief valve, a breathing film and a shielding plate. The upper cover is provided at a position overlapping the power storage stack in the Z direction, and has a protruding portion protruding upward. The pressure relief valve and the breathing film are each provided in the protrusion. The shield plate is disposed between the protrusion and the power storage stack.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an electrical storage device and a vehicle. BACKGROUND

[0002] In Japanese Patent Application Publication No. 2020-136072, a battery pack is disclosed that includes a plurality of battery stacks and a case that houses the battery stacks. SUMMARY

[0003] Although not described in Japanese Patent Application Publication No. 2020-136072, a pressure release valve and a breather membrane are sometimes provided in the case. Here, the battery stacks sometimes emit sparks in a situation where the temperature excessively rises, or the like. In this case, it is conceivable that sparks are emitted from the pressure release valve to the outside of the case, or that the breather membrane is affected by heat from sparks and smoke from the battery stacks.

[0004] The present disclosure was made to solve the above problem, and aims to provide an electrical storage device and a vehicle that can suppress adverse effects caused by sparks and smoke from an electrical storage stack when a pressure release valve and a breather membrane are provided in a case.

[0005] The electrical storage device of the first aspect of the present disclosure includes an electrical storage module including at least one electrical storage stack, a case that houses the electrical storage module, a pressure release valve provided in the case, a breather membrane, and a first shield provided in the case. The case includes an upper cover provided so as to cover the electrical storage module from above. The upper cover is provided at a position overlapping the at least one electrical storage stack in the vertical direction, and has a raised portion that is raised upward. The pressure release valve and the breather membrane are each provided in the raised portion. The first shield is provided between the raised portion and the at least one electrical storage stack.

[0006] In the electrical storage device of the first aspect of the present disclosure, as described above, the pressure release valve and the breather membrane are each provided in the raised portion, and the first shield is provided between the raised portion and the at least one electrical storage stack. As a result, the scattering of sparks from the electrical storage stack is hindered by the first shield, and thus the emission of sparks from the pressure release valve to the outside can be suppressed. In addition, the scattering (blowing) of sparks and smoke from the electrical storage unit to the breather membrane can be suppressed by the first shield. As a result, the breather membrane can be prevented from being excessively heated by sparks and smoke. Thus, adverse effects caused by sparks and smoke from the electrical storage stack can be suppressed.

[0007] Further, by providing the pressure release valve and the breather membrane each in the protruding portion, it is possible to easily increase the distance between the electricity storage stack and each of the pressure release valve and the breather membrane. As a result, it is possible to more suppress the scattering of sparks from the electricity storage stack to each of the pressure release valve and the breather membrane. Further, it is possible to more suppress the scattering of sparks and smoke from the electricity storage stack to the breather membrane (directly).

[0008] The electricity storage device of the above-described first aspect is preferably an electricity storage device arranged at a bottom portion of an electrical apparatus. Further, the electricity storage device is provided with a sealing member arranged so as to seal a gap between the protruding portion and the bottom portion. The sealing member is provided with a ventilation portion. If so configured, it is possible to fill the space between the protruding portion and the bottom portion with smoke by the sealing member. As a result, it is possible to reduce the proportion of oxygen in the above-described space. Further, by providing the sealing member with the ventilation portion, it is possible to suppress the pressure of the above-described space from becoming excessively large due to the smoke.

[0009] The electricity storage device of the above-described first aspect preferably has a second shielding plate different from the first shielding plate. The above-described at least one electricity storage stack includes a plurality of electricity storage stacks. The plurality of electricity storage stacks include a lower-stage electricity storage stack arranged at a lower stage (lower section / layer) and an upper-stage electricity storage stack arranged at an upper stage (upper section / layer) stacked on the lower stage. The second shielding plate is arranged between the upper-stage electricity storage stack and the protruding portion. Here, the pressure release valve and the breather membrane are each arranged in the protruding portion protruding upward, and thus are arranged in the vicinity of the upper-stage electricity storage stack. Thus, by so configuring, it is possible to effectively suppress the scattering of sparks to each of the pressure release valve and the breather membrane. Further, it is possible to effectively suppress the scattering of smoke from the electricity storage stack to the breather membrane directly.

[0010] In this case, it is preferable that the upper cover has a lower-stage cover portion covering the lower-stage electricity storage stack and an upper-stage cover portion covering the upper-stage electricity storage stack. The protruding portion is arranged at an upper surface of the lower-stage cover portion at a position apart from the upper-stage cover portion. The upper-stage cover portion includes a side surface covering the upper-stage electricity storage stack from the side. The above-described side surface includes the second shielding plate. If so configured, it is possible to use a part of the upper-stage cover portion as the second shielding plate, and thus it is possible to suppress an increase in the number of components and to simplify the configuration of the electricity storage device.

[0011] The electricity storage device of the above-described first aspect is preferably such that the pressure release valve and the breather membrane are arranged in a predetermined direction intersecting the up-down direction. The first shielding plate extends in the predetermined direction so as to cover both the pressure release valve and the breather membrane from below. If so configured, by the first shielding plate, it is possible to further suppress the scattering of sparks from the electricity storage stack to each of the pressure release valve and the breather membrane. Further, it is possible to further suppress the scattering of smoke from the electricity storage stack to the breather membrane directly.

[0012] The power storage device of the above-described first aspect is preferably configured such that 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 protruding portion is provided so as to straddle the first power storage stack and the second power storage stack. If configured in this way, 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.

[0013] The power storage device of the above-described first aspect is preferably configured such that the power storage module includes a fuse. When the power storage module is viewed in the up-down direction from a position apart from the power storage module, the fuse is disposed in a second region that is apart from a first region in which the at least one power storage stack is disposed. If configured in this way, the spark, smoke, and the like generated from the power storage stack can be inhibited from coming into contact with the fuse. As a result, the thermal influence on the fuse can be inhibited.

[0014] The vehicle of the second aspect of the present disclosure is provided with a vehicle body and the power storage device of the above-described first aspect. Thus, a vehicle that can inhibit adverse effects caused by sparks, smoke, and the like from the power storage stack can be provided.

[0015] In the vehicle of the above-described second aspect, it is preferable that the vehicle body include a vehicle body bottom portion. The power storage device is disposed in the vehicle body bottom portion, and includes a sealing member disposed so as to seal a gap between the protruding portion and the vehicle body bottom portion. The sealing member is provided with a vent portion. If configured in this way, by providing the vent portion in the sealing member, the pressure of the space between the vehicle body bottom portion and the protruding portion can be inhibited from becoming excessively large due to the smoke.

[0016] The above and other objects, features, aspects, and advantages of the present application will become more apparent from the following detailed description of the present application taken in conjunction with the accompanying drawings, in which: BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a view showing the configuration of a vehicle on which a power storage device of an embodiment is mounted.

[0018] Figure 2 is a perspective view showing the schematic configuration of a power storage device of an embodiment.

[0019] Figure 3 is a plan view showing the schematic configuration of a power storage device of an embodiment.

[0020] Figure 4 is a sectional view along the IV-IV line of Figure 3 .

[0021] Figure 5 is a schematic plan view of a state in which the upper cover of the power storage device of an embodiment is removed.

[0022] Figure 6 is a cross-sectional view along Figure 3 the VI-VI line of FIG. 1.

[0023] Figure 7 is a partially enlarged cross-sectional view of the vicinity of the shield plate of a first modification of the embodiment.

[0024] Figure 8 is a partially enlarged cross-sectional view of the vicinity of the protruding portion of a second modification of the embodiment. DETAILED DESCRIPTION

[0025] Embodiments of the present disclosure are described with reference to the accompanying drawings. Further, in the drawings referred to below, the same or equivalent components are denoted by the same reference numerals.

[0026] Figure 1 is a view showing a vehicle 200 in which a power storage device 100 according to an embodiment of the present disclosure is mounted. 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). Further, the vehicle 200 is an example of an "electrical apparatus" of the present disclosure.

[0027] The X direction, the Y direction, and the Z direction shown in the present specification are directions orthogonal to each other. For example, the X direction and the Y direction can be the front-rear direction and the left-right direction of the vehicle 200, respectively. In addition, the Z direction can be the up-down (vertical) direction. Further, the Y direction is an example of a "predetermined direction" and a "direction intersecting with the up-down direction" of the present disclosure. In addition, the Z direction is an example of an "up-down direction" of the present disclosure.

[0028] The vehicle 200 includes, in addition to the power storage device 100, a vehicle body 210. The vehicle body 210 has a vehicle body bottom portion 211. The vehicle body bottom portion 211 is provided at a lower portion (bottom portion) of the vehicle body 210. The power storage device 100 is disposed at the vehicle body bottom portion 211. Specifically, the power storage device 100 is fixed (fastened and joined) to the vehicle body bottom portion 211 below the vehicle body bottom portion 211. Further, the vehicle body bottom portion 211 is an example of a "bottom portion" of the present disclosure.

[0029] As shown in FIG. 1, the power storage device 100 includes a case 10, a power storage module 20 (refer to FIG. 2), a pressure release valve 30, a breathing membrane 40, a sealing member 50 (refer to FIG. 3), and a plate-shaped member 60 (refer to FIG. 4). Figures 2-4 Figure 3 Figure 3 Figure 4 ​​​​

[0030] Figure 2 is a perspective view schematically showing the configuration of the power storage device 100. Further, in Figure 2 , the illustration of the sealing member 50 described later is omitted for simplicity.

[0031] As shown in Figure 2 , the case 10 includes the upper cover 1 and the lower case 2. The upper cover 1 is disposed on the Z1 side (upper side) of the lower case 2. The upper cover 1 is disposed so as to cover (cover) the lower case 2 from the Z1 side. By assembling the upper cover 1 to the lower case 2, a housing space of the case 10 is formed. The power storage module 20 Figure 3 is disposed in the above-described housing space. That is, the upper cover 1 is disposed so as to cover the power storage module 20 from the Z1 side.

[0032] The upper cover 1 has an upper covering portion 1a and a lower covering portion 1b. The upper covering portion 1a covers the power storage stack 21a described later. The lower covering portion 1b covers the power storage stack 21b described later. The upper cover 1 and the power storage stack 21 described later each have a two-stage configuration.

[0033] The upper covering portion 1a is disposed at the X2 side than the center in the X direction of the upper cover 1. The lower covering portion 1b extends in the X direction so as to cover the entire area in the X direction in which the upper cover 1 is disposed.

[0034] The lower covering portion 1b has an upper surface 1c. The upper surface 1c is a surface extending in a manner intersecting (orthogonal to) the Z direction. The upper surface 1c is disposed on the X1 side of the upper covering portion 1a.

[0035] The upper cover 1 has a protruding portion 3. The protruding portion 3 protrudes toward the Z1 side. Specifically, the protruding portion 3 has a shape protruding toward the Z1 side. Further, in Figure 2 , the protruding portion 3 is schematically illustrated.

[0036] The protruding portion 3 is disposed on the upper surface 1c of the lower covering portion 1b. The protruding portion 3 protrudes from the upper surface 1c of the lower covering portion 1b. The protruding portion 3 is disposed at a position separated from the upper covering portion 1a. Further, in the case 10 at a position corresponding to the protruding portion 3, an apparatus or the like not illustrated can be disposed.

[0037] A pressure release valve 30 is provided to the case 10. The pressure release valve 30 releases the pressure in the case 10. The pressure release valve 30 opens when the pressure in the case 10 becomes a reference value or more. The pressure release valve 30 is constituted by a check valve.

[0038] A breather membrane 40 is provided to the case 10. The breather membrane 40 adjusts the pressure in the case 10 by allowing the passage of gas between the inside of the case 10 and the outside of the case 10.

[0039] The pressure release valve 30 and the breathing membrane 40 are each provided to the raised portion 3. The pressure release valve 30 and the breathing membrane 40 are arranged in the Y direction in the raised portion 3. Further, the pressure release valve 30 and the breathing membrane 40 can also be arranged in the X direction in the raised portion 3.

[0040] As shown in Figure 3 , the raised portion 3 is arranged in a manner that straddles the two electric storage stack 21b (described later) arranged in the Y direction. Specifically, the raised portion 3 is arranged in a manner that the central portion 3a of the raised portion 3 in the Y direction overlaps the gap G1 between the two electric storage stacks 21b in the Z direction.

[0041] As shown in Figure 4 , the sealing member 50 is arranged in a manner that seals the gap G2 between the raised portion 3 and the vehicle body bottom 211. The sealing member 50 is formed of, for example, rubber or the like. Further, the sealing member 50 can be fixed by being inserted into a groove portion not shown.

[0042] Further, the upper cover 1 has a shape along the shape of the vehicle body bottom 211 of the vehicle 200. The vehicle body bottom 211 is provided with a recessed portion 211a corresponding to the raised portion 3. The raised portion 3 enters the recessed portion 211a of the vehicle body bottom 211. That is, the raised portion 3 is housed in the recessed portion 211a.

[0043] Referring again to Figure 3 , the sealing member 50 is arranged in a manner that surrounds the raised portion 3 when viewed from the Z1 side. That is, the sealing member 50 is formed in a ring shape when viewed from the Z1 side. Further, the sealing member 50 can be arranged in a manner that overlaps, for example, the outer periphery of the raised portion 3.

[0044] The sealing member 50 is provided with a vent portion 51 and a vent portion 52. Smoke discharged from the electric storage module 20 described later passes through each of the vent portions 51 and 52 after being discharged from the pressure release valve 30 to the outside of the case 10. Further, each of the vent portions 51 and 52 is an opening (slit) provided at a portion of the ring-shaped sealing member 50.

[0045] The vent portion 51 is provided to the Y2 side with respect to the raised portion 3 (the pressure release valve 30 and the breathing membrane 40). The vent portion 52 is provided to the Y1 side with respect to the raised portion 3 (the pressure release valve 30 and the breathing membrane 40). Thereby, it is possible to suppress the flow of smoke after passing through each of the vent portions 51 and 52 to the front and rear of the vehicle 200.

[0046] The electricity storage module 20 includes a plurality of electricity storage stacks 21. The plurality of electricity storage stacks 21 includes a plurality of electricity storage stacks 21a arranged at an upper stage and a plurality of electricity storage stacks 21b arranged at a lower stage. The upper stage (electricity storage stacks 21a) is laminated to the lower stage (electricity storage stacks 21b). The upper stage (electricity storage stacks 21a) is covered by an upper stage cover portion 1a. The lower stage (electricity storage stacks 21b) is covered by a lower stage cover portion 1b. Further, the electricity storage stacks 21a and the electricity storage stacks 21b are examples of the "upper stage electricity storage stack" and the "lower stage electricity storage stack" of the present disclosure, respectively.

[0047] The protrusion portion 3 is arranged at a position overlapping with a part of the plurality of electricity storage stacks 21 in the Z direction. Specifically, the protrusion portion 3 is arranged at a position overlapping with a part of the plurality of electricity storage stacks 21b in the Z direction.

[0048] The two electricity storage stacks 21 are arranged in the Y direction (21a to each other, 21b to each other). Three groups each consisting of two electricity storage stacks 21a arranged in the Y direction are arranged in the X direction at the upper stage. Eight groups each consisting of two electricity storage stacks 21b arranged in the Y direction are arranged in the X direction at the lower stage. Further, the number of the above-mentioned groups is not limited to the above-mentioned example. Further, one of the two electricity storage stacks 21b arranged in the Y direction and the other thereof are examples of the "first electricity storage stack" and the "second electricity storage stack" of the present disclosure, respectively.

[0049] The electricity storage module 20 includes a fuse 22. The fuse 22 is fused due to a large current flowing in the electricity storage module 20. In this case, the current no longer flows in the electricity storage module 20.

[0050] When the electricity storage module 20 is observed in the Z direction from a position P (refer to FIG. 1) separated from the electricity storage module 20, Figure 4 ), the fuse 22 is arranged at a region S2 separated from a region S1 in which the plurality of electricity storage stacks 21 are arranged. The region S2 is arranged at an X1 side of the region S1. In addition, the fuse 22 is arranged at a central portion of the electricity storage device 100 in the Y direction. Further, the arrangement position of the fuse 22 in the Y direction is not limited to the above-mentioned example. In addition, the region S1 and the region S2 are examples of the "first region" and the "second region" of the present disclosure, respectively.

[0051] As shown in FIG. 6, Figure 4 The plate-shaped member 60 is housed in the case 10. The plate-shaped member 60 is positioned between a position at which the electricity storage stacks 21a are arranged and a position at which the electricity storage stacks 21b are arranged in the Z direction. The plate-shaped member 60 extends in the X direction so as to span the plurality of electricity storage stacks 21b. In the plate-shaped member 60, a bus bar (not shown) used as an electrical wiring within the electricity storage module 20 is arranged (fixed). Further, the plate-shaped member 60 is formed of a metal such as iron.

[0052] Here, the electricity storage stack sometimes emits sparks, smoke, or the like in a case where the temperature excessively rises. Specifically, sparks, smoke, or the like are emitted from the safety valve of the electricity storage unit. In this case, it is considered that sparks are emitted from the pressure release valve to the outside of the case, or the breathing membrane is affected by heat from the sparks, smoke, or the like from the electricity storage stack.

[0053] Thus, in the present embodiment, the shielding plate 61 is arranged between the protrusion 3 and the plurality of electricity storage stacks 21 (21b). Specifically, the shielding plate 61 is arranged at a position overlapping the protrusion 3 in the Z direction. Further, the shielding plate 61 is an example of the "first shielding plate" of the present disclosure.

[0054] Figure 5 is a plan view showing the outline configuration of the plate-shaped member 60. As shown in Figure 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 in a manner so as to straddle two electricity storage stacks 21b arranged in the Y direction.

[0055] The shielding plate 61 has a width W1 in the Y direction. The portion other than the shielding plate 61 in the plate-shaped member 60 has a width W2. The width W1 is larger than the width W2. Further, the width W1 and the width W2 each can 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.

[0056] As shown in Figure 6 , the shielding plate 61 is formed so as to extend in the Y direction in a manner 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 so as to have a wide width in the Y direction. The shielding plate 61 is provided in a manner so as to plug the opening 3b of the protrusion 3. The opening 3b is provided at the lower end portion 3c of the protrusion 3. The lower end portion 3c is formed in a ring shape.

[0057] Further, in the protrusion 3, no opening other than the opening 3b is provided. Thereby, it is possible to suppress smoke generated in the electricity storage stack 21 from reaching the pressure release valve 30 and the breathing membrane 40 of the protrusion 3. As a result, it is possible to reduce the thermal effect on the breathing membrane 40.

[0058] The opening 3b is formed with a gap V that is not blocked by the shield plate 61. The gap V is formed between the outer peripheral edge 61a of the shield plate 61 and the lower end portion 3c of the raised portion 3. Smoke generated in the electricity storage stack 21 passes through the gap V to the pressure release valve 30. In addition, the width W3 of the gap V is smaller than the width Wl of the shield plate 61 in the Y direction. The width W3 is 1 / 2 or less of the width Wl. For example, the width W3 can be 1 / 10 or more of the width Wl and 1 / 8 or less of the width Wl. In addition, the relationship between the width Wl and the width W3 is not limited to the above-described example.

[0059] Each electricity storage stack 21 has a plurality of electricity storage cells 21c and a battery cell case 21d. The plurality of electricity storage cells 21c are housed in the battery cell case 21d. The shield plate 61 (the plate-shaped member 60) is supported by the battery cell case 21d from the Z2 side. In other words, the shield plate 61 (the plate-shaped member 60) is placed on the battery cell case 21d. Smoke from each electricity storage cell 21c is discharged, for example, from a not-illustrated exhaust valve provided at an upper portion (upper end surface) of the battery cell case 21d. In addition, the number of electricity storage cells 21c housed in the battery cell case 21d can also be one. In the present embodiment, in the battery cell case 21d, a plurality of electricity storage cells 21c having a length direction in the X direction are arranged in the Y direction. In addition, in the battery cell case 21d, a plurality of electricity storage cells having a length direction in the Y direction can also be arranged in the X direction.

[0060] The raised portion 3 has a base portion 3d and a cover portion 3e. The base portion 3d is formed continuously with a portion of the upper cover 1 adjacent to the raised portion 3 (a portion around the raised portion 3). The base portion 3d is formed so as to be raised toward the Zl side. In addition, the configuration of the raised portion 3 is not limited to the above-described example. For example, the cover portion 3e can not be provided in the raised portion.

[0061] The cover portion 3e is placed on the base portion 3d. The cover portion 3e is fixed to an upper end portion 3f of the base portion 3d. A protruding portion 3g that protrudes toward the Zl side is provided at the upper end portion 3f of the base portion 3d. The cover portion 3e includes a flange portion 3i provided with a hole portion 3h. By inserting the protruding portion 3g into the hole portion 3h, the cover portion 3e is fixed (engaged) to the base portion 3d. In addition, the protruding portion 3g and the hole portion 3h each can be formed in a ring shape, for example. In addition, a plurality of protruding portions 3g (a plurality of hole portions 3h) can be arranged in a circumferential direction.

[0062] The cover portion 3e is formed so as to protrude toward the Zl side. In addition, the pressure release valve 30 and the breather membrane 40 are each provided in the cover portion 3e. Specifically, the pressure release valve 30 and the breather membrane 40 are each provided at an upper end portion of the cover portion 3e.

[0063] Referring again to Figure 4The upper covering portion 1a covers the side surface 1d of the power storage stack 21a from the side. Specifically, the side surface 1d covers the power storage stack 21a from the X1 side (the protruding portion 3 side). Further, the side surface 1d is an example of the "second shielding plate" of the present disclosure.

[0064] The side surface 1d is provided between the power storage stack 21a and the protruding portion 3. Specifically, the side surface 1d is provided between the power storage stack 21a on the X1 side (the protruding portion 3 side) among the plurality of power storage stacks 21a and the protruding portion 3. Further, the side surface 1d is provided in a manner along the cell case 21d (refer to Figure 6 ) of the above-described power storage stack 21a.

[0065] The side surface 1d extends in the Z direction from around the position at which the lower end portion 3c (refer to Figure 6 ) of the protruding portion 3 is provided to a position above the position at which the upper end portion of the power storage stack 21a is provided.

[0066] As described above, in the power storage device 100 of the present embodiment, the shielding plate 61 is arranged between the protruding portion 3 and the power storage stack 21b. Thereby, the space between the power storage stack 21b and the protruding portion 3 can be partitioned by the shielding plate 61. As a result, the sparks generated in the power storage stack 21b can be suppressed from flying to the position above the shielding plate 61. Thereby, the sparks can be suppressed from flying to the pressure release valve 30 and the breather membrane 40. In addition, the flow of the smoke from the power storage stack 21b can be hindered by the shielding plate 61.

[0067] In addition, in the present embodiment, the sealing member 50 that seals the gap G2 between the protruding portion 3 and the vehicle body bottom portion 211 is provided with the air passage portions (51, 52). Thereby, by the sealing member 50, the gap G2 is filled with the smoke from the power storage stack 21, and thus, the oxygen ratio in the gap G2 can be reduced. Also, the smoke is discharged from the air passage portions (51, 52), and thus, the pressure of the gap G2 can be maintained to be equal to or less than a certain value.

[0068] In addition, in the present embodiment, the upper covering portion 1a covers the side surface 1d of the power storage stack 21a from the side. Thereby, the flying of the sparks and the smoke from the power storage stack 21a can be hindered by the side surface 1d. As a result, the sparks generated in the power storage stack 21a can be suppressed from reaching the protruding portion 3. In addition, the smoke from the power storage stack 21a can be suppressed from flying directly to the protruding portion 3.

[0069] In the above-described embodiment, an example in which the side surface 1d of the upper cover 1 is provided between the protruding portion 3 and the power storage stack 21a is shown, but the present disclosure is not limited thereto. For example, as Figure 7As shown, the pressure release valve 30 and the breathing membrane 40 can each also be provided to the side surface 11d of the upper cover 11 of the housing 110. The side surface 11d is formed in a manner that protrudes toward the Z1 side. Further, the side surface 11d is an example of the "protruding portion" of the present disclosure.

[0070] The upper cover 11 is provided with a shielding plate 111. The shielding plate 111 is provided to the inside of the housing 110. The shielding plate 111 is provided between the most X1 side (side surface 11d side) of the plurality of electricity storage stack bodies 21a and the side surface 11d. The side surface 11d is provided in a manner that follows the most X1 side of the electricity storage stack body 21a described above. The shielding plate 111 is provided in a manner that extends in the Z direction. Further, the shielding plate 111 can be formed integrally with the upper cover 11. In addition, the shielding plate 111 can be separate from the upper cover 11 and fixed to the upper cover 11. Further, the shielding plate 111 is an example of the "second shielding plate" of the present disclosure.

[0071] In the above-described embodiment, an example in which the electricity storage module 20 is provided with a plurality of electricity storage stack bodies 21 is shown, but the present disclosure is not limited thereto. The number of electricity storage stack bodies provided to the electricity storage module can also be one.

[0072] In the above-described embodiment, an example in which the sealing member 50 that seals the gap G2 between the vehicle body bottom portion 211 and the protruding portion 3 is provided is shown, but the present disclosure is not limited thereto. The sealing member 50 can also not be provided.

[0073] In the above-described embodiment, an example in which the sealing member 50 is provided with the vent portions (51, 52) is shown, but the present disclosure is not limited thereto. The sealing member can also not be provided with the vent portions. In addition, the vent portions can be formed by providing through-holes to the sealing member.

[0074] In the above-described embodiment, an example in which the vent portions (51, 52) of the sealing member 50 are provided to each of the Y1 side and the Y2 side of the pressure release valve 30 and the breathing membrane 40 is shown, but the present disclosure is not limited thereto. The vent portions can also be provided to only either of the Y1 side and the Y2 side of the pressure release valve 30 and the breathing membrane 40. In addition, the vent portions can be provided to at least one of the X1 side and the X2 side of the pressure release valve 30 and the breathing membrane 40.

[0075] In the above-described embodiment, an example in which the pressure release valve 30 and the breathing membrane 40 are each provided to the same protruding portion 3 is shown, but the present disclosure is not limited thereto. The pressure release valve 30 and the breathing membrane 40 can also be provided to mutually different protruding portions.

[0076] In the above embodiment, an example in which the electric storage device 100 is disposed at the bottom portion 211 of the vehicle body of the vehicle 200 is shown, but the present disclosure is not limited to this. The electric storage device 100 can also be disposed at the bottom portion of an electrical device other than a vehicle (for example, a stationary electric storage device).

[0077] In the above embodiment, an example in which the upper-stage electric storage stack 21a and the lower-stage electric storage stack 21b are included in the electric storage module 20 is shown, but the present disclosure is not limited to this. The upper-stage electric storage stack can also not be included in the electric storage module.

[0078] In the above embodiment, an example in which the width W1 of the shield plate 61 is larger than the width W2 of the portion of the plate-shaped member 60 other than the shield plate 61 is shown, but the present disclosure is not limited to this. For example, the width W2 can also be equal to the width W1.

[0079] In the above embodiment, an example in which the shield plate 61 is a portion of the plate-shaped member 60 is shown, but the present disclosure is not limited to this. The shield plate 61 can also be separate from the plate-shaped member 60.

[0080] In the above embodiment, an example in which the protruding portion 3 is disposed in a manner that straddles two electric storage stacks 21b arranged in the Y direction is shown, but the present disclosure is not limited to this. The protruding portion 3 can also be disposed in a manner that overlaps only either of the above two electric storage stacks 21b in the Z direction.

[0081] In the above embodiment, an example in which the region S1 in which the electric storage stack 21 is disposed and the region S2 in which the fuse 22 is disposed are separate is shown, but the present disclosure is not limited to this. For example, the region S1 and the region S2 can overlap in the Z direction. In addition, the region S1 and the region S2 can also be adjacent when viewed in plan.

[0082] In the above embodiment, an example in which the pressure release valve 30 and the breather membrane 40 are respectively independently provided is shown, but the present disclosure is not limited to this. The pressure release valve can also be provided integrally with the breather membrane. In this case, the pressure release valve and the breather membrane can be provided as a single member. Figure 8 In the example shown, a single member 35 that integrally has the functions of the pressure release valve 30 and the breather membrane 40 is provided at the cover portion 3e. Furthermore, the member 35 is an example of the "pressure release valve" and the "breather membrane" of the present disclosure.

[0083] In the above embodiment, an example in which two electric storage stacks 21 are arranged in the Y direction is shown, but the present disclosure is not limited to this. The electric storage stacks 21 can also not be arranged in the Y direction. In addition, it can also be that three or more electric storage stacks 21 are arranged in the Y direction.

[0084] In the above embodiment, an example in which the protruding portion 3 is provided to the lower covering portion 1b is shown, but the present disclosure is not limited thereto. The protruding portion 3 can also be provided to the upper covering portion 1a.

[0085] Furthermore, the configurations of the above-described embodiment and the above-described various modified examples can be combined with each other.

[0086] The embodiments of the present application have been described, but it should be considered that the embodiments disclosed herein are illustrative and not restrictive in all aspects. The scope of the present application is shown by the claims, and is intended to include all modifications with the same meaning and scope as the claims.

Claims

1. An electric power storage device, comprising: an electric power storage module including at least one electric power storage stack; a case accommodating the electric power storage module; a pressure release valve provided to the case; a breather membrane; and a first shield plate accommodated in the case, wherein the case includes an upper cover provided so as to cover the electric power storage module from above, the upper cover is provided at a position overlapping the at least one electric power storage stack in a vertical direction, has a raised portion raised upward, each of the pressure release valve and the breather membrane is provided to the raised portion, and the first shield plate is arranged between the raised portion and the at least one electric power storage stack.

2. The electric power storage device according to claim 1, wherein the electric power storage device is arranged at a bottom portion of an electrical apparatus, the electric power storage device further includes a sealing member arranged so as to seal a gap between the raised portion and the bottom portion, and the sealing member is provided with a vent portion.

3. The electric power storage device according to claim 1 or 2, wherein the electric power storage device further includes a second shield plate different from the first shield plate, the at least one electric power storage stack includes a plurality of electric power storage stacks, the plurality of electric power storage stacks include: a lower electric power storage stack arranged at a lower stage; and an upper electric power storage stack arranged at an upper stage on the lower electric power storage stack, and the second shield plate is provided between the upper electric power storage stack and the raised portion.

4. The electric power storage device according to claim 3, wherein the upper cover has: a lower covering portion covering the lower electric power storage stack; and an upper covering portion covering the upper electric power storage stack, the raised portion is provided at an upper surface of the lower covering portion at a position separate from the upper covering portion, the upper covering portion includes a side surface covering the upper electric power storage stack from a side, and the side surface includes the second shield plate.

5. The electric power storage device according to claim 1 or 2, wherein the pressure release valve and the breather membrane are arranged in a predetermined direction intersecting the vertical direction, and the first shield plate extends in the predetermined direction so as to cover both the pressure release valve and the breather membrane from below.

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

7. The electric power storage device according to claim 1 or 2, wherein the electric power storage module includes a fuse, and the fuse is arranged in a second region separate from a first region in which the at least one electric power storage stack is arranged, when the electric power storage module is viewed in the vertical direction from a position separate from the electric power storage module.

8. A vehicle, comprising: a vehicle body; and the electric power storage device according to claim 1 or 2.

9. The vehicle according to claim 8, wherein the vehicle body includes a vehicle body bottom portion, the electric power storage device is arranged at the vehicle body bottom portion, the electric power storage device includes a sealing member arranged so as to seal a gap between the raised portion and the vehicle body bottom portion, and the sealing member is provided with a vent portion. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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