Pressure regulating valve for energy storage modules

Abstract

Provided is a pressure adjustment valve that can improve electrolyte discharge. A pressure adjustment valve 1 can be attached to a power storage module 500. The pressure adjustment valve 1 has a plurality of valve elements 10. The valve elements 10 open in accordance with the pressure inside the power storage module 500 and release the pressure inside the power storage module 500. Each of the valve elements 10 has a discharge part 118 for releasing pressure, and the interiors of adjacent valve elements 10 are isolated from each other.

Description

[Technical Field]

[0001] The present disclosure relates to a pressure regulating valve for an electricity storage module. [Background technology]

[0002] Conventional power storage modules such as nickel-metal hydride batteries have a pressure regulation valve that opens to discharge gas from the module when gas such as hydrogen gas is generated due to overdischarge or other reasons and the pressure inside the module reaches a predetermined level. Pressure regulation valves for power storage modules (hereinafter referred to as "pressure regulation valves") are known that have a simple configuration and are capable of regulating the pressure in multiple internal spaces between bipolar electrodes (see, for example, International Publication No. 2019 / 064843). Summary of the Invention [Problem to be solved by the invention]

[0003] When the pressure regulating valve opens, the electrolyte may be discharged along with the gas, and in this case, the electrolyte may accumulate inside the pressure regulating valve.

[0004] Conventional pressure regulating valves have multiple valve bodies attached to one outlet, making it difficult to smoothly discharge the electrolyte. As a result, multiple valve bodies are immersed in the electrolyte. In this case, if multiple valve bodies open simultaneously and the electrolyte is discharged, there is a risk of short-circuiting between multiple cells through the electrolyte.

[0005] The present disclosure aims to provide a pressure regulating valve that can improve the discharge of electrolyte. [Means for solving the problem]

[0006] One aspect of the present disclosure is a method for manufacturing a semiconductor device comprising: A pressure regulating valve that can be attached to an electricity storage module, a plurality of valve bodies that open in response to pressure in the electricity storage module to release the pressure in the electricity storage module, Each valve body portion has a vent portion for releasing pressure; The inside is isolated from other adjacent valve body parts. a plurality of valve body portions; A pressure regulating valve having the following structure. [Effects of the Invention]

[0007] The pressure regulating valve of the present disclosure can improve the discharge of electrolyte. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view schematically illustrating an energy storage module to which a pressure regulating valve according to a first embodiment is connected; [Figure 2] FIG. 1 is an exploded perspective view showing a schematic configuration of a pressure regulating valve according to a first embodiment; [Figure 3] Cross-sectional view of the pressure regulating valve in Figure 2 [Figure 4] Front view of the case of the pressure regulating valve in Figure 2 [Figure 5] AA cross section of the case in Figure 4 [Figure 6] Front view of the cover of the pressure regulating valve in Figure 2 [Figure 7] Plan view of the cover part of Figure 6 [Figure 8] FIG. 10 is an exploded perspective view showing a schematic configuration of a pressure regulating valve according to a second embodiment. [Figure 9] Front view of the case of the pressure regulating valve of Figure 8 [Figure 10] Plan view of the case part of Figure 9 [Figure 11] FIG. 9 is a front view of a cover serving as a lid for the pressure regulating valve of FIG. 8; [Figure 12] Plan view of the cover part of Figure 11 DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments will be described with reference to the drawings.

[0010] [First embodiment] Fig. 1 is a perspective view schematically showing an electricity storage module 500 to which a pressure regulating valve 1 of the first embodiment is connected. Fig. 2 is an exploded perspective view showing the general configuration of the pressure regulating valve 1 of the first embodiment. Fig. 3 is a cross-sectional view of the pressure regulating valve 1. In Fig. 2 and subsequent figures, the pressure regulating valve 1 is shown in a partially enlarged view of a portion A shown in Fig. 1.

[0011] For ease of explanation, in the pressure regulating valve 1 shown in Figures 2 and 3, the axial direction of the cylindrical valve element 30 is referred to as the Y-axis direction. The Y-axis direction is also referred to as the front-to-rear direction. In the pressure regulating valve 1, the +Y-axis direction is also referred to as one end side (first direction side), and the -Y-axis direction is also referred to as the other end side (second direction side). In this embodiment, the direction in which the pressure regulating valve 1 is viewed in the +Y-axis direction is defined as the front direction. One of the directions (X-axis direction) perpendicular to the front-rear direction (Y-axis direction) is defined as the width direction. The width direction is the longitudinal direction of the pressure regulating valve 1. The width direction is also referred to as the left-right direction. The direction (Z-axis direction) perpendicular to both the front-rear direction (Y-axis direction) and the left-right direction (X-axis direction) is also referred to as the up-down direction or height direction. When the positional relationship and direction of each component are described as right side, left side, front side, rear side, top side, and bottom side, these refer to the positional relationship and direction in the drawing and do not limit the positional relationship and direction in an actual pressure regulating valve.

[0012] 1 and 2, the pressure regulating valve 1 of this embodiment has a plurality of valve body portions 10. The plurality of valve body portions 10 open in response to the pressure inside the energy storage module 500, thereby releasing the pressure inside the energy storage module 500. Each valve body portion 10 has a discharge portion 118 for releasing the pressure. The interior of each valve body portion 10 is isolated from the interior of an adjacent valve body portion 10.

[0013] The power storage module 500 has a frame 502 that holds a plurality of electrode plates. The frame 502 has an opening 503 that communicates with the space between the plurality of electrode plates. The pressure regulating valve 1 closes the opening 503. The valve body portion 10 has a case portion 110. The case portion 110 has a cylindrical portion 114. One end of the cylindrical portion 114 is connected to the opening 503 and defines an internal space S2. The internal space S2 of the cylindrical portion 114 houses a columnar valve body 30, which is an elastic member.

[0014] The case 110 further has a bottom 111, an opening 113, a pressure introducing portion 115, a cover 116, and a protrusion 117. The bottom 111 is provided on the first direction side. The opening 113 is provided on the second direction side. The pressure introducing portion 115 penetrates the bottom 111. The cover 116 is a lid that closes the opening 113. The protrusion 117 is provided on the cover 116 and contacts the end face 31 of the valve body 30 from the second direction side. The pressure regulating valve 1 will be described in detail below.

[0015] As described above, the pressure regulating valve 1 has a plurality of valve body portions 10. The valve body portions 10 house the valve bodies 30. The valve body portions 10 are attached to the openings 503 of the energy storage module 500. The valve body portions 10 have a cylindrical portion 114, a cover portion 116, a discharge portion 118, and the valve bodies 30.

[0016] The material of the case 110 and the cover 116 is not particularly limited and may be, for example, a synthetic resin. As shown in FIG. 1 , the shape of the case 110 is, for example, a substantially rectangular parallelepiped. As long as it can close the opening 503, the shape of the case 110 is not particularly limited. The size of the case 110 is also not particularly limited and can be set appropriately in relation to the size of the power storage module 500 or the opening 503. The material of the case 110 and the cover 116 may be the same material or different materials.

[0017] Fig. 4 is a front view of the case portion 110 of the pressure regulating valve 1. Fig. 5 is a cross-sectional view of the case portion 110 taken along line AA. 4 and 5, the case 110 is, for example, a rectangular parallelepiped box whose width is longer than its height and front-rear dimensions. The case 110 has a bottom 111, an outer peripheral wall 112, an opening 113, a cylindrical portion 114, and a pressure introducing portion 115.

[0018] The bottom 111 is provided on the first direction side of the case 110. When the pressure regulating valve 1 is attached to the opening 503 of the frame 502, the bottom 111 is attached so as to face the opening 503, as shown in Fig. 3 . In this state, the bottom 111 is formed so as to close the opening 503.

[0019] The outer peripheral wall 112 is provided at an end portion of the outer periphery of the bottom portion 111. The outer peripheral wall 112 is provided at an end portion 1111 in the vertical direction of the bottom portion 111. The outer peripheral wall 112 is a wall-shaped member that rises from the end portion 1111 toward the second direction (-Y axis direction). As shown in FIG. 4, the bottom portion 111 and the outer peripheral wall 112 define an internal space S1 inside the case portion 110 that is isolated from the outside.

[0020] The opening 113 is provided in an end 1122 on the second direction side of the outer peripheral wall 112. The opening 113 opens the second direction side of the internal space S1 of the case 110 to the outside.

[0021] The cylindrical portion 114 is provided in the internal space S1 of the case 110. The cylindrical portion 114 has a cylindrical or approximately cylindrical shape with its axial direction aligned in the front-to-rear direction (Y-axis direction) of the case 110. One or more cylindrical portions 114 are provided in the internal space S1. The number of cylindrical portions 114 is not particularly limited. The end of the cylindrical portion 114 on the first direction side is integral with an inner surface 1112, which is the surface on the second direction side of the bottom 111. The end of the cylindrical portion 114 on the second direction side opens toward the opening 113. When combined with a cover portion 116 (described later), the cylindrical portion 114 can accommodate a valve element 30 in the cylindrical or approximately cylindrical internal space S2, as shown in FIG. 3 . The internal space S2 of the cylindrical portion 114 functions as an accommodation chamber that accommodates the valve element 30. The pressure regulating valve 1 can accommodate multiple valve elements 30 corresponding to the number of cylindrical portions 114 provided in the internal space S1.

[0022] The pressure introducing portion 115 is provided in the cylindrical portion bottom portion 1113, which is the bottom portion located inside the cylindrical portion 114. The pressure introducing portion 115 is a through-hole that extends in the Y-axis direction in the cylindrical portion bottom portion 1113. In other words, the pressure introducing portion 115 penetrates the cylindrical portion bottom portion 1113 from the first direction side to the second direction side. The pressure introducing portion 115 is not limited to being provided near the center of the circle or approximately circle of the cylindrical portion bottom portion 1113 as shown in FIG. 4. The pressure introducing portion 115 is, for example, a cylindrical space. The shape of the pressure introducing portion 115 is not particularly limited, and may be, for example, an elliptical cylindrical or polygonal cylindrical space.

[0023] Fig. 6 is a front view of the cover portion 116 of the pressure regulating valve 1. Fig. 7 is a plan view of the cover portion 116.

[0024] 6 and 7, the cover 116 is, for example, a rectangular plate-like or substantially plate-like member whose width is greater than its height. The cover 116 has a cover body 1161, a protrusion 117, an ejection portion 118, and a rib 119.

[0025] The cover body 1161 determines the general shape of the above-described plate-like or approximately plate-like cover body 116. As long as the cover body 116 can be combined with the case body 110, the shape of the cover body 1161 is not limited to the shapes shown in FIGS.

[0026] The ribs 119 are arranged on the second direction side of the cover body 1161. In other words, the ribs 119 are provided on the cover body 1161 on the side opposite to the case 110. The ribs 119 are upright wall-shaped portions extending in the front-rear direction (Y-axis direction). The ribs 119 may be arranged corresponding to the positions of the tubular portion 114 and the discharge portions 118. The ribs 119 surround the peripheries of the discharge portions 118 in the -Y-axis direction of the multiple discharge portions 118.

[0027] The protrusion 117 is provided on the cover body 1161. The protrusion 117 is in the form of a protrusion that protrudes from the cover body 1161 in the Y-axis direction. A plurality of protrusions 117 is provided corresponding to the number of discharge portions 118. As shown in FIG. 3 , when the cover 116 and the case 110 are combined, the protrusion 117 is provided on the inside of the cylindrical surface of the tubular portion 114. When the cover 116 and the case 110 are combined, the protrusion 117 protrudes toward the case 110 on the first direction side (+Y-axis direction) and presses the valve body 30 arranged inside the tubular portion 114 from the opening 113 side.

[0028] The protrusion 117 contacts the end face 31 of the valve body 30. By closing the opening 113 of the case part 110 with the cover part 116, the protrusion 117 applies pressure to the valve body 30. The valve body 30 airtightly closes the pressure introducing part 115, as will be described later.

[0029] There are no particular limitations on the shape or dimensions of protrusion 117, as long as opening 113 of case 110 can be closed with cover 116 and pressure can be applied to valve body 30. Protrusion 117 may be, for example, cylindrical, elliptical, or polygonal.

[0030] The discharge portion 118 is formed in the cover portion main body 1161. When the opening 113 of the cylindrical portion 114 is closed by the cover portion 116, the discharge portion 118 is formed at a position overlapping the internal space S2 of the cylindrical portion 114. The discharge portion 118 is an opening portion that communicates between the inside and outside of the cover portion main body 1161. In FIG. 2, the discharge portion 118 is a through hole that extends in the front-rear direction (Y-axis direction) of the cover portion main body 1161. The discharge portion 118 is provided corresponding to each of the cylindrical portions 114 that constitute the valve body portion 10. Note that the specific shape of the discharge portion 118 is not limited to the examples in FIGS. 1, 5, and 6. It is sufficient that the discharge portion 118 is formed corresponding to each of the cylindrical portions 114 so as to communicate between the inside and outside of the cylindrical portion 114.

[0031] The discharge portion 118 is provided in each of the multiple valve body portions 10. It is sufficient that at least one discharge portion 118 is formed in one valve body portion 10, and multiple discharge portions 118 may be formed in one valve body portion 10. The outer surface of the cover body main body 1161 and the rib 119 are located between the multiple discharge portions 118. Therefore, the discharge portions 118 are isolated from each other by the cover body main body 1161 and the rib 119, and are independent of each other without contacting each other. In other words, the cover body main body 1161 and the rib 119 function as partition walls that isolate each of the multiple discharge portions 118. Furthermore, the discharge portions 118 corresponding to other cylindrical portions 114 are not provided in the vertical direction (Z-axis direction), which is the direction in which the electrolyte accumulated in the internal space S2 of the cylindrical portion 114 flows out when it leaks. In other words, the discharge portions 118 are spaced apart at a predetermined interval in the width direction (X-axis direction) from the discharge portions 118 corresponding to the other cylindrical portions 114, and do not overlap with the other discharge portions 118. As a result, the discharge portions 118 do not come into contact with the other discharge portions 118 and are independent of each other.

[0032] As shown in Figures 2 and 3, the valve element 30 is cylindrical and is housed in the cylindrical portion 114. The material of the valve element 30 is, for example, an elastic material such as rubber. There are no particular restrictions on the material of the valve element 30 as long as it is an elastic material. The valve element 30 covers the cylindrical portion bottom portion 1113 side of the cylindrical portion 114. The length of the valve element 30 in the axial direction (Y-axis direction) is shorter than the outer diameter.

[0033] The valve element 30 is cylindrical, but as described above, the length in the axial direction (Y-axis direction) is shorter than the outer diameter (dimension in the Z-axis direction). Therefore, the valve element 30 can also be said to be plate-shaped or disk-shaped. More specifically, the valve element 30 can be approximately disk-shaped.

[0034] The valve element 30 is inserted into the cylindrical portion 114 to close the opening of the pressure introducing portion 115. As a result, when the pressure regulating valve 1 is attached to the energy storage module 500, the pressure introducing portion 115 remains airtight until the interior of the energy storage module 500 reaches a desired pressure.

[0035] When the pressure inside the energy storage module 500 (hereinafter simply referred to as "internal pressure") rises to a desired value, the valve element 30 opens by separating from the cylindrical bottom 1113 in accordance with the internal pressure of the energy storage module 500. Here, the value of the internal pressure of the energy storage module 500 at which the valve element 30 separates from the cylindrical bottom 1113 is determined so as to prevent the internal pressure of the energy storage module 500 from becoming excessive when the valve element 30 opens. The value of the pressure inside the energy storage module 500 when the valve element 30 separates from the cylindrical bottom portion 1113 may vary depending on various conditions. Specifically, the value of the internal pressure may vary depending on individual differences (variations) in the valve element 30 and changes over time.

[0036] As the valve element 30 moves away from the cylindrical portion bottom 1113, a gap is created between the valve element 30 and the cylindrical portion bottom 1113. The compressed gas in the energy storage module 500 is introduced into the pressure regulating valve 1 through this gap. The pressure inside the energy storage module 500 then decreases. The elastic force of the valve element 30 then causes the valve element 30 to return to its original position inside the cylindrical portion 114, i.e., to the position where it contacts the cylindrical portion bottom 1113, and airtightly closes the pressure introducing portion 115.

[0037] When the valve element 30 separates from the cylindrical portion bottom 1113 and the compressed gas inside the electricity storage module 500 is discharged from the gap that is formed between the valve element 30 and the cylindrical portion bottom 1113, the electrolyte may be discharged along with the compressed gas. In this case, the electrolyte may accumulate inside the cylindrical portion 114.

[0038] The cover body 1161 is provided with discharge portions 118 corresponding to the plurality of cylindrical portions 114 that house the valve bodies 30. The discharge portions 118 discharge the electrolyte that flows into the internal space S2 of the cylindrical portions 114 when the valve bodies 30 open to the outside of the cylindrical portions 114. Therefore, the pressure regulating valve 1 can smoothly discharge the electrolyte that has accumulated inside the cylindrical portions 114. Furthermore, the pressure regulating valve 1 prevents the valve bodies 30 from being immersed in the electrolyte.

[0039] The discharge portions 118 provided corresponding to each of the plurality of valve bodies 30 are isolated from each other by the cover body 1161. Therefore, when the plurality of valve bodies 30 are simultaneously opened and the electrolyte is discharged, it is possible to prevent a short circuit from occurring between the plurality of cells due to the electrolyte.

[0040] [Second embodiment] Next, a pressure regulating valve 2 of a second embodiment will be described. Hereinafter, components having the same or similar functions as those of the pressure regulating valve 1 of the first embodiment will be denoted by the same reference numerals, and their description will be omitted, and only the different components will be described.

[0041] As shown in Fig. 7, the pressure regulating valve 2 of the second embodiment, like the pressure regulating valve 1 of the first embodiment, has a plurality of valve bodies 20 that open in response to the pressure inside the energy storage module 500 shown in Fig. 1 and release the pressure inside the energy storage module 500. Each valve body 20 has a discharge portion 218 for releasing the pressure. The interior of each valve body 20 is isolated from the other adjacent valve body bodies 20.

[0042] The pressure regulating valve 2 closes an opening 503 in a frame 502 that holds multiple electrode plates of the energy storage module 500, the opening 503 communicating with the space between the multiple electrode plates provided in the frame 502. The discharge portion 218 is provided on a side surface 220 of the cylindrical portion 214, and communicates between the inside and outside of the cylindrical portion 214. The cylindrical portion 214 of the valve body 20 is provided in the case 210. One end of the cylindrical portion 214 is connected to the opening. The cylindrical portion 214 has an internal space S2. A columnar valve body 30, which is an elastic member, is housed in the internal space S2 of the cylindrical portion 214. In addition to the discharge portion 218, the case 210 has a bottom 211, an opening 213, the cylindrical portion 214, and a pressure introducing portion 215. The bottom 211 is provided on the first direction side. The opening 213 is provided on the second direction side. The cylindrical portion 214 is provided in the internal space S1 of the valve body portion 20 and is capable of accommodating the valve body 30. The pressure introducing portion 215 passes through the bottom portion 211.

[0043] The pressure regulating valve 2 has a cover portion 216 and a protrusion portion 217. The cover portion 216 is a lid portion that closes the opening portion 213. The protrusion portion 217 is provided on the cover portion 216 and contacts the end face of the valve body 30 from the second direction side. The pressure regulating valve 2 will be described in detail below.

[0044] The pressure regulating valve 2 has a plurality of valve body portions 20. As in the pressure regulating valve 1 of the first embodiment, the valve body portion 20 accommodates the valve body 30 and is attached to the opening 503 of the electricity storage module 500.

[0045] Similar to the valve body portion 10 of the first embodiment, the valve body portion 20 has a cylindrical portion 214 , a discharge portion 218 , a cover portion 216 , and a valve body 30 . Fig. 9 is a front view of the case portion 210 of the pressure regulating valve 2. Fig. 10 is a plan view of the case portion 210.

[0046] 9 and 10, the case 210 is, for example, a rectangular box-shaped member whose width is longer than its height and front-rear dimensions. The case 210 has a bottom 211, an outer peripheral wall 212, an opening 213, a cylindrical portion 214, a pressure introduction portion 215, and an outlet 218. The case 210 differs from the case 110 of the first embodiment in that the side surface 220 of the cylindrical portion 214 and the outer peripheral wall 212 have the outlet 218 that communicates between the inside and outside of the cylindrical portion 214.

[0047] The discharge portions 218 are formed on the cylindrical or approximately cylindrical side surface 220 of the tubular portion 214 and on the outer peripheral wall portion 212. The discharge portions 218 are openings that communicate between the inside and outside of the side surface 220 of the tubular portion 214 and the inside and outside of the outer peripheral wall portion 212. In FIGS. 8 and 10 , the discharge portions 218 extend in the front-to-rear direction (Y-axis direction) of the side surface 220 and the outer peripheral wall portion 212. The discharge portions 218 are provided corresponding to each tubular portion 214. 9 and 10. It is sufficient that the discharge portion 218 is formed so as to communicate between the inside and outside of the side surface 220 in correspondence with each cylindrical portion 214.

[0048] The discharge portions 218 are provided corresponding to the multiple cylindrical portions 214, respectively. At least one discharge portion 218 may be formed in one cylindrical portion 214. As shown in FIGS. 8 to 10 , multiple discharge portions 218 may be formed in one cylindrical portion 214. The outer peripheral surfaces of the side surfaces 220 and the outer peripheral wall portions 212 are located between the multiple discharge portions 218. Therefore, the discharge portions 218 are isolated from each other by the side surfaces 220 and the outer peripheral wall portions 212. The discharge portions 218 are independent of each other and do not come into contact with each other. In other words, the side surfaces 220 and the outer peripheral wall portions 212 of the cylindrical portion 214 function as partition walls that isolate the multiple discharge portions 218. When the electrolyte solution accumulated in the internal space S2 of the cylindrical portion 214 leaks, it flows out in the vertical direction (Z-axis direction). The discharge portions 218 are not provided in the vertical direction (Z-axis direction) with discharge portions 218 corresponding to other cylindrical portions 214. In other words, the discharge portions 118 are separated by a predetermined distance in the width direction (X-axis direction) from the discharge portions 118 corresponding to other cylindrical portions 114, and do not overlap with the other discharge portions 218. As a result, the discharge portions 218 are isolated from the other discharge portions 218, do not come into contact with the other discharge portions 218, and are independent of each other.

[0049] Fig. 11 is a front view of the cover portion 216 of the pressure regulating valve 2. Fig. 12 is a plan view of the cover portion 216. 11 and 12, the cover part 216 is, for example, a rectangular plate-like or substantially plate-like member whose width dimension is longer than its height dimension. The cover part 216 has a cover part main body 2161 and a protrusion part 217. The cover part 216 of this embodiment differs from the cover part 116 of the first embodiment in that it does not have an ejection part 118.

[0050] In the pressure regulating valve 2, when the valve element 30 separates from the cylindrical portion bottom 2113 and the compressed gas inside the electricity storage module 500 is discharged from a gap formed between the valve element 30 and the cylindrical portion bottom 2113, the electrolyte may be discharged together with the compressed gas. In this case, the electrolyte may accumulate in the internal space S2 of the cylindrical portion 214.

[0051] The pressure regulating valve 2 is provided with discharge portions 218 on the side surface 220 and the outer peripheral wall portion 212 of the cylindrical portions 214 corresponding to the plurality of cylindrical portions 214 that house the valve bodies 30. Therefore, the pressure regulating valve 2 can smoothly discharge the electrolyte that has accumulated inside the cylindrical portions 214. Therefore, the pressure regulating valve 2 can prevent the valve bodies 30 from being immersed in the electrolyte.

[0052] The discharge portions 218 are isolated from each other by the side surface 220 of the cylindrical portion 214 and the outer peripheral wall portion 212. Therefore, when multiple valve bodies 30 are simultaneously opened to discharge the electrolyte, it is possible to prevent a short circuit from occurring between multiple cells due to the electrolyte.

[0053] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and includes all aspects encompassed by the concept and scope of the claims. Furthermore, each configuration may be appropriately and selectively combined to achieve at least some of the above-described problems and effects. For example, the shape, material, arrangement, size, etc. of each component in the above-described embodiments may be appropriately modified depending on the specific use of the present invention.

[0054] In the pressure regulating valve 1 of the first embodiment, the cover body 1161 of the cover 116 has a discharge portion 118 that communicates between the inside and outside of the cover 116. In the pressure regulating valve 2 of the second embodiment, the side surface 220 of the cylindrical portion 214 and the outer peripheral wall portion 212 have a discharge portion 218 that communicates between the inside and outside of the cylindrical portion 214. In the pressure regulating valves of the first and second embodiments, both the cover portion and the case portion may have a discharge portion. [Explanation of symbols]

[0055] 1, 2...Pressure regulating valve 10, 20...Valve body 31...End face 30...Valve body 110,210…Case section 111,211…Bottom 112,212...Outer peripheral wall 113,213...Opening 114,214...Cylindrical part 115, 215...Pressure introduction section 116,216...Cover part 117,217...Protrusion 118,218...Discharge section 119...Rib 220...side 500... Energy storage module 502…Frame body 503…Aperture 1112...Inner surface 1113, 2113...Bottom of cylindrical part 1111,1122...End 1161, 2161...Cover body

Claims

1. A pressure regulating valve that can be attached to an electricity storage module, a plurality of valve bodies that open in response to pressure in the electricity storage module to release the pressure in the electricity storage module, Each valve body portion has a vent portion for releasing pressure; The inside is isolated from other adjacent valve body parts. a plurality of valve body portions; and The valve body portion is The bottom and an opening on the opposite side of the bottom; a side surface provided between the bottom and the opening; and The discharge portion is provided on the side surface. Pressure regulating valve.

2. The nozzle further includes a partition wall that separates the plurality of discharge sections. The pressure regulating valve according to claim 1 .

3. The valve body portion is a valve body that opens in response to pressure inside the electricity storage module; a housing chamber that houses the valve body; and The discharge portion discharges the electrolyte solution that flows into the storage chamber when the valve body opens to the outside of the storage chamber. The pressure regulating valve according to claim 1 or 2.

4. A pressure regulating valve that can be attached to an electricity storage module, a plurality of valve bodies that open in response to pressure in the electricity storage module to release the pressure in the electricity storage module, Each valve body portion has a vent portion for releasing pressure; The inside is isolated from other adjacent valve body parts. a plurality of valve body portions; and The valve body portion is The bottom and an opening on the opposite side of the bottom; a lid portion that closes the opening; and The discharge portion is provided in the lid portion. Pressure regulating valve.

5. Further having a partition wall portion that separates the plurality of discharge portions. The pressure regulating valve according to claim 4.

6. The partition wall portion is a cover body that defines the outer shape of the lid; a rib provided on the cover body; and The plurality of discharge sections are independent from each other by the cover body and the rib. The pressure regulating valve according to claim 5.

7. The valve body portion is a valve body that opens in response to pressure inside the electricity storage module; a housing chamber that houses the valve body; and The discharge portion discharges the electrolyte solution that flows into the storage chamber when the valve body opens to the outside of the storage chamber. The pressure regulating valve according to claim 6.

8. The discharge section does not overlap with the discharge section corresponding to another storage chamber in the width direction. The pressure regulating valve according to claim 7.

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