JP2015056323A - Power storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power storage device in which foreign objects are less likely to intrude into an outer sheath from a communication part.SOLUTION: A power storage device 100 of the invention includes: one or more power storage elements 400 containing a nonaqueous electrolyte; and an outer sheath 200 which stores the one or more power storage elements 400. The outer sheath 200 includes a communication part 130A forming a communication passage W11 which allows an internal space S1 of the outer sheath 200 to communicate with an external space S2 and extends in an X axis direction. The communication part 130A includes shield plates 131A to 134A which prevent a material in the communication passage W11 from moving in the X axis direction and are disposed so that communication between the internal space S1 and the external space S2 through the communication passage W11 is maintained.

Description

  The present invention relates to a power storage device in which one or more power storage elements are housed in an exterior body.

  A combination of a non-aqueous electrolyte secondary battery such as a lithium-ion battery as a power source or auxiliary power source for an automobile such as EV (Electric Vehicle), PHEV (Plug-in Hybrid Electric Vehicle), HEV (Hybrid Electric Vehicle), and gasoline engine car Many power storage devices are used (see, for example, Patent Document 1). Among such power storage devices, there are those in which a plurality of single cells are hermetically sealed in an exterior body.

  By the way, in the case of abnormalities such as overcharge and internal short circuit, the non-aqueous electrolyte secondary battery opens a gas discharge valve (safety valve) provided in the unit cell, and gas is discharged from the safety valve to the inside of the exterior body. . For this reason, some power storage devices are provided with an exhaust port for exhausting gas outside the exterior body.

JP 2007-195311 A

  Since this exhaust port is a communication path that communicates the space inside the exterior body of the power storage device and the space outside the exterior body, for example, when the power storage device is mounted on an automobile, When traveling or traveling, foreign matter such as water scattered from the outside may enter the exterior body of the power storage device through the communication path.

  Therefore, the present invention has been made in view of such a situation, and an object of the present invention is to provide a power storage device in which foreign matter is less likely to enter the exterior body from the communication path.

  In order to achieve the above object, a power storage device according to one embodiment of the present invention includes one or more power storage elements including a non-aqueous electrolyte, and an exterior body that houses the one or more power storage elements. Has a communication portion that communicates the space inside the exterior body and the space outside and that forms a communication passage extending at least in the first direction, and the communication portion is a substance in the communication passage. Has a shielding member arranged so as to prevent movement in the first direction and to maintain communication between the internal space and the external space by the communication path.

  According to this, the communication path extending in at least the first direction prevents the substance in the communication path from moving in the first direction, and the communication by the communication path between the internal space and the external space is maintained. Since the shielding member is arranged as described above, it is possible to prevent the foreign matter scattered to the communication portion forming the communication path from entering the space inside the exterior body.

  In addition, for example, it includes one or more power storage elements including a non-aqueous electrolyte, and an exterior body that houses the one or more power storage elements, and the exterior body includes an internal space and an external space of the exterior body. The communication part has a communication part that forms a communication path that extends at least in the first direction, and the communication part is arranged so as to be filled without a gap when the communication path is viewed from the first direction. You may have a shielding member.

  According to this, since the shielding member disposed so as to fill the communication portion without gaps when viewed from the first direction is provided in the communication portion of the exterior body, it is scattered with respect to the communication portion of the exterior body. Incoming foreign matter can be prevented from entering the space inside the exterior body.

  For example, the shielding member may be composed of a plurality of shielding plates.

  For this reason, even if foreign matter is scattered from the outside of the exterior body of the power storage device to the inside of the communication portion, even if the foreign matter is scattered outside the region covered by the first shielding plate from the outside, Next, the scattering of foreign matter can be shielded by the shielding plate disposed. In other words, such a structure can reduce the intrusion of foreign matter into the exterior body.

  Further, for example, the plurality of shielding plates may be disposed so as to be inclined such that the free end side thereof is located on the outer side of the exterior body with respect to the fixed end side.

  For this reason, even if a foreign object enters the inside of the communication part from the outside of the exterior body of the power storage device, the communication part can easily move the foreign object that hits the shielding plate to the fixed end side of the shielding plate. . There is no passage for foreign matter to enter the exterior body on the fixed end side of the shielding plate, and it cannot enter the exterior body unless it moves to the free end side. That is, by having such a structure, it is possible to further reduce the entry of foreign matter into the exterior body.

  Further, for example, the plurality of shielding plates include a first shielding plate and a second shielding plate, and the first shielding plate is a region of the communication path when the communication portion is viewed from the first direction. Is disposed so as to fill the first region on one side in the second direction intersecting the first direction, and the second shielding plate is the first shielding plate They may be arranged at different positions in the direction, and may be arranged so as to fill a second region on the other side in the second direction, which is a partial region of the region of the communication path.

  For this reason, even if foreign matter enters the inside of the communication portion from the outside of the exterior body of the power storage device, the foreign matter cannot enter the interior of the exterior body unless it moves while changing its direction so as to avoid the shielding plate. . In other words, such a structure can reduce the intrusion of foreign matter into the exterior body.

  Further, for example, the plurality of shielding plates include a first shielding plate and a second shielding plate, and the first shielding plate is a region of the communication path when the communication portion is viewed from the first direction. The second shielding plate is disposed at a position different from the first shielding plate in the first direction, and is disposed so as to fill a first region including the central axis of the communication path. In addition, it may be arranged so as to fill a second region that is a partial region of the region of the communication path and that is outside the first region.

  For this reason, even if foreign matter has entered the inside of the communicating portion from the outside of the exterior body of the power storage device, after the foreign matter is separated to avoid the central shielding plate, it does not move to the center again, Cannot enter the exterior body. In other words, such a structure can reduce the intrusion of foreign matter into the exterior body.

  Further, for example, the shielding member may be formed so as to partition the space of the communication path in a spiral shape.

  For this reason, even if a foreign object enters the inside of the communicating portion from the outside of the exterior body of the power storage device, the foreign object cannot enter the exterior body unless it moves while rotating in the spiral space. That is, by having such a structure, it is possible to further reduce the entry of foreign matter into the exterior body.

  Further, for example, the communication part may further include a waterproof film provided on the inner space side than the shielding member.

  For this reason, invasion of a large amount of water that is difficult to prevent by the shielding member can be prevented by the waterproof film.

  In addition, for example, the waterproof membrane seals the internal space of the exterior body by closing the communication path, and when the pressure inside the exterior body exceeds a predetermined pressure, The communication path may be brought into a communication state by being damaged.

  According to this, when the pressure inside the exterior body exceeds a predetermined pressure, the waterproof film is generated from the power storage element when the power storage element is abnormal because the communication path is in a communication state by being damaged. The gas can be discharged from the space inside the exterior body to the space outside the exterior body through the communication path.

  According to the power storage device of the present invention, it is possible to prevent the intrusion of foreign matters such as water while allowing the gas to be discharged.

1 is a perspective view of a power storage device according to an embodiment of the present invention. It is a disassembled perspective view of an electrical storage apparatus. It is an enlarged view of the part of area | region A1 in FIG. It is the schematic which shows the flow of the gas discharged | emitted from the internal space of the exterior body of an electrical storage apparatus when gas generate | occur | produces at the time of abnormality. FIG. 3 is a diagram illustrating a configuration of a communication portion of the exterior body according to the first embodiment. 6 is a diagram showing a configuration of a communication part of an exterior body according to Embodiment 2. FIG. FIG. 10 is a diagram illustrating a configuration of a communication portion of an exterior body according to Embodiment 3. It is a figure which shows the structure of the communication part of the exterior body which concerns on Embodiment 4. FIG. It is a figure which shows the structure of the communication part of the exterior body which concerns on Embodiment 5. FIG.

  Hereinafter, embodiments will be described with reference to the drawings. Each of the embodiments described below shows a preferred specific example of the present invention. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of the constituent elements, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept of the present invention are described as optional constituent elements that constitute a more preferable embodiment.

(Embodiment 1)
1 is a perspective view of a power storage device according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view of the power storage device. FIG. 3 is an enlarged view of a region A1 in FIG.

  In these figures, the Z-axis direction is shown as the up-down direction, and in the following, the Z-axis direction will be described as the up-down direction. However, depending on the use mode, the Z-axis direction may not be the up-down direction. The Z-axis direction is not limited to the vertical direction. Further, in each of the X-axis direction, the Y-axis direction, and the Z-axis direction in these drawings, the direction ahead of the arrow is the plus direction, and the opposite direction is the minus direction. The same applies to the following drawings.

  As shown in these drawings, power storage device 100 includes exterior body 200, a plurality of bus bars 300, and a plurality (four in the present embodiment) of power storage elements 400.

  The exterior body 200 is a box-shaped member that houses a plurality of power storage elements 400. The exterior body 200 forms a sealed internal space S1 and houses a plurality of power storage elements 400 in the internal space S1. The exterior body 200 includes a bottomed rectangular tube-shaped exterior body main body 220 and a lid body 210 that closes an opening of the exterior body main body 220. The exterior body 220 has a plurality of power storage elements 400 arranged in the X-axis direction at predetermined positions, protects each power storage element 400 from an impact, etc., and each power storage element 400 unintentionally contacts a metal member or the like. It is a member which avoids. The exterior body 200 is made of an insulating material such as a resin.

  The exterior body 200 includes an external positive terminal 110 and an external negative terminal 120. The external positive terminal 110 and the external negative terminal 120 are terminals connected to an external load to supply power stored in the power storage device 100 to an external load, or power supplied from an external power source is stored in the power storage device. A terminal connected to an external power source for storing in 100.

  The lid 210 communicates the internal space S1 formed by the exterior body 200 with a space outside the exterior body (hereinafter referred to as “external space S2”), and in the X-axis direction as the first direction. It has the communication part 130 which forms the cylindrical communication path W1 extended. Note that, for example, an exhaust hose 500 communicating with the outside air is connected to the terminal end of the communication unit 130 (that is, the outer end of the communication unit 130). In addition, the communication part 130 is not limited to extending from the exterior body 200 in the X-axis direction, and may extend in the Y-axis direction, the Z-axis direction, or other directions. Moreover, although the communication part 130 is formed in the cover body 210, it may be formed in the exterior body main body 220. That is, the communication part 130 should just be formed in the exterior body 200, and the position in which the communication part 130 is formed in the exterior body 200 is not limited.

  The power storage element 400 is an element that can be charged and discharged, and includes a conductive container 410, a positive electrode terminal 420, and a negative electrode terminal 430. The power storage element 400 is a secondary battery including a non-aqueous electrolyte, for example, a lithium ion secondary battery. Note that a capacitor may be employed as the power storage element 400 instead of the lithium ion secondary battery. The container 410 of the storage element 400 is provided with a safety valve 440 for discharging the gas generated inside the container 410 when an abnormality occurs such as when the storage element 400 is overcharged or when an internal short circuit occurs. The positive electrode terminal 420 and the negative electrode terminal 430 protrude above the container 410. The plurality of power storage elements 400 are arranged in a row in the X-axis direction in a state where the upper side of the container 410 is turned sideways so as to face the Y-axis direction.

  In addition, each of the plurality of power storage elements 400 is connected to the opposite pole terminals by a bus bar 300 that is a metal plate member. That is, the plurality of power storage elements 400 are connected in series by the bus bar 300. The plurality of power storage elements 400 connected in series by the bus bar 300 have a positive electrode side connected to the external positive electrode terminal 110 and a negative electrode side connected to the external negative electrode terminal 120 via the circuit board 310.

  The circuit board 310 is housed outside the arrangement direction (X-axis direction) of the plurality of power storage elements 400 in the internal space S1 of the exterior body 220. The circuit board 310 has a function of monitoring an electrical state such as a charging state or a discharging state of the plurality of power storage elements 400 or controlling charging / discharging of the plurality of power storage elements 400.

  Next, the communication part 130 is demonstrated using FIG. 4 and FIG. 5A. FIG. 4 is a diagram illustrating a flow of gas discharged from the internal space of the exterior body of the power storage device when gas is generated from the power storage element during an abnormality. FIG. 5A is a diagram illustrating a configuration of a communication portion of the exterior body.

  As shown in FIGS. 4 and 5A, the exterior body 200 is provided with a waterproof film 140 on the internal space S1 side of the communication path W1 (W11). The waterproof film 140 is made of a known material such as a resinous film or a metal foil, and is a film that prevents water from entering from the outside. The waterproof film 140 is made of a waterproof / breathable material having waterproofness and air permeability (moisture permeability) such as Gore-Tex (registered trademark) and TEMISH (registered trademark), and a nonwoven fabric. A membrane may be employed. In addition, the waterproof film 140 is damaged when the gas generated from each power storage element 400 fills the internal space S1 and the internal space S1 exceeds a predetermined pressure, so that the waterproof passage 140 is damaged, thereby causing the communication passage W1 (W11). ) Is in communication. That is, the waterproof membrane 140 also functions as a safety valve that causes the internal space S1 and the external space S2 to communicate with each other through the communication path W1 (W11) when damaged. As described above, since the waterproof membrane 140 is damaged, the gas generated from each power storage element 400 is externally passed from the internal space S1 of the exterior body 200 through the communication path W1 (W11) as shown by the white arrows in FIG. It can be discharged into the space S2.

  As shown in FIG. 5A, the communication unit 130A specifically includes a plurality of shielding plates 131A to 134A as shielding members. In addition, (a) of FIG. 5A is aa sectional drawing of the communication part 130 shown in FIG. That is, the communication part 130A and the communication path W11 in FIG. 5A are forms of the communication part 130 and the communication path W1 shown in FIGS. FIG. 5A (b) is a view when the communication portion 130A is viewed from the outside in the X-axis direction.

  Of the plurality of shielding plates 131A to 134A, the shielding plates 131A and 133A are substantially semicircular plate-like members that block an area from the upper part of the axial cross section of the communication path W11 to a position beyond the central axis of the communication path W11. It is. Further, the shielding plates 132A and 134A are substantially semicircular plate-like members that block the region from the lower part of the axial cross section of the communication path W11 to the position beyond the central axis of the communication path W11. That is, the plurality of shielding plates 131A to 134A are arranged so as to overlap each other in a region including the central axis of the communication path W11 when the communication portion 130A is viewed from the X-axis direction.

  In addition, each of the plurality of shielding plates 131A to 134A is disposed at a different position in the X-axis direction. That is, the plurality of shielding plates 131 </ b> A to 134 </ b> A are arranged to be staggered inside the communication portion 130 </ b> A. In short, the communication portion 130A is maintained in a state where the communication path W11 communicates from one end side to the other end side.

  That is, it can be said that the plurality of shielding plates 131A to 134A include the first shielding plate and the second shielding plate. Here, the “first shielding plate” is a partial region of the region of the communication path W11 when the communication portion 130A is viewed from the X-axis direction, and is a second direction intersecting the X-axis direction. Is a shielding plate arranged so as to fill the first region on one side in the Y-axis direction. In addition, the “second shielding plate” referred to here is an area of the communication path W11 that is disposed at a position different from the first shielding plate in the X-axis direction and when the communication portion 130A is viewed from the X-axis direction. It is a shielding board arrange | positioned so that it may be a one part area | region, and may fill the 2nd area | region of the other side of a X-axis direction. Specifically, the first shielding plates are shielding plates 131A and 133A among the plurality of shielding plates 131A to 134A, and the second shielding plates are shielding plates 132A and 134A among the plurality of shielding plates 131A to 134A. It is.

  Further, the plurality of shielding plates 131A to 134A are arranged so as to be filled with no gap when the communication portion 130A is viewed from the X-axis direction (that is, when the other end side is viewed from one end side of the communication portion 130A). It can also be said.

  According to power storage device 100 according to the first embodiment, communication portion 130A of exterior body 200 has a state in which communication portion 130A communicates with communication passage W11 without a gap when communication portion 130A is viewed from the X-axis direction. A plurality of shielding plates 131A to 134A arranged so as to be maintained are provided. More specifically, the plurality of shielding plates 131A to 134A provided in the communication portion 130A are arranged so as to be filled with no gap when the communication portion 130A is viewed from the X-axis direction.

  Thereby, for example, when the power storage device 100 is mounted on an automobile and high-pressure car washing is performed, foreign matters such as water scattered toward the communication portion 130A of the exterior body 200 of the power storage device 100 are collected. Even if it is scattered outside the region covered by the first shielding plate, the scattering of foreign matter can be shielded by the shielding plate arranged next.

  In addition, the foreign matter cannot enter the exterior body 200 unless it moves in the communication portion 130A while changing its direction so as to avoid the plurality of shielding plates 131A to 134A. For this reason, it can reduce that a foreign material penetrate | invades into the inside from the exterior of the exterior body 200 of the electrical storage apparatus 100. FIG.

  As described above, in power storage device 100 according to the first embodiment, water can be prevented from entering inside exterior body 200, so that a short circuit can be prevented from occurring between a plurality of power storage elements. .

  According to power storage device 100 according to the first embodiment, communication unit 130A has waterproof film 140 provided on the inner space side with respect to the plurality of shielding plates 131A to 134A.

  Thus, by providing the waterproof film 140 in the communication portion 130A, it is possible to prevent inflow of a large amount of water that is difficult to prevent by the plurality of shielding plates 131A to 134A. That is, for example, when the power storage device 100 is submerged and a large amount of water flows into the communication portion 130A, it is difficult to prevent the water from flowing in with the plurality of shielding plates 131A to 134A. However, the waterproof film 140 can prevent inflow of water due to submergence that is difficult to prevent with the plurality of shielding plates 131A to 134A.

  In addition, since the plurality of shielding plates 131A to 134A are provided on the outer space S2 side of the exterior body 200 of the waterproof film 140 in the communication portion 130A, for example, due to intrusion of foreign matters such as water that flies straightly, It is possible to prevent the waterproof film 140 from being damaged.

(Embodiment 2)
FIG. 5B is a diagram illustrating a configuration of a communication portion of the exterior body according to Embodiment 2. 5B is a cross-sectional view taken along the line aa of the communication portion 130 shown in FIG. That is, the communication part 130B and the communication path W12 of FIG. 5B are one form of the communication part 130 and the communication path W1 shown in FIGS. (B) of FIG. 5B is a figure at the time of seeing the communication part 130B from the outer side of the X-axis direction.

  As shown in FIG. 5B, the communication portion 130B has a plurality of shielding plates 131B and 132B as shielding members. The communication part 130B forms a communication path W12. The shielding plate 131B disposed on the outer side of the plurality of shielding plates 131B and 132B includes a circular plate-shaped disk portion 131Ba and a disk portion 131Ba disposed in the central region of the axial section of the communication portion 130B. Is connected to the inner wall of the communication portion 130B. The shielding plate 132B disposed on the inner space S1 side among the plurality of shielding plates 131B and 132B is a ring-shaped plate extending from the inner peripheral edge of the axial section of the communication portion 130B toward the central axis of the communication portion 130B. It is a member. The outer peripheral edge of the disc part 131Ba of the shielding plate 131B and the inner peripheral edge of the shielding plate 132B are arranged so as to be filled with no gap when the communication part 130B is viewed from the X-axis direction.

  That is, the plurality of shielding plates 131B and 132B include a first shielding plate and a second shielding plate. Here, the “first shielding plate” is a partial region of the communication passage W12 when the communication portion 130B is viewed from the X-axis direction, and includes a central axis of the communication passage W12. It is the shielding board arrange | positioned so that one area | region may be filled up. Further, the “second shielding plate” referred to here is an area of the communication path W12 that is disposed at a position different from the first shielding plate in the X-axis direction and when the communication portion 130B is viewed from the X-axis direction. It is a shielding board arrange | positioned so that it may be a partial area | region among them, and the 2nd area | region which is an area | region outside a 1st area | region may be filled. Specifically, the first shielding plate is the shielding plate 131B of the plurality of shielding plates 131B and 132B, and the second shielding plate is the shielding plate 132B of the plurality of shielding plates 131B and 132B.

(Embodiment 3)
FIG. 5C is a diagram illustrating a configuration of a communication portion of the exterior body according to Embodiment 3. 5A is a cross-sectional view taken along the line aa of the communication portion 130 shown in FIG. That is, the communication part 130C and the communication path W13 in FIG. 5C are one form of the communication part 130 and the communication path W1 shown in FIGS. FIG. 5C (b) is a view when the communication portion 130C is viewed from the outside in the X-axis direction.

  As illustrated in FIG. 5C, the communication portion 130C includes a plurality of shielding plates 131C to 134C as shielding members. The communication part 130C forms a communication path W13. The plurality of shielding plates 131C to 134C are arranged so as to be filled with no gap when the communication portion 130C is viewed from the X-axis direction, and the free end sides of the plurality of shielding plates 131C to 134C are fixed end sides. It inclines and arrange | positions so that it may be located in the outer side of the exterior body 200 rather than.

  Of the plurality of shielding plates 131C to 134C, the shielding plates 131C and 133C are substantially semicircular members that block an area from the upper part of the axial section of the communication portion 130C to a position beyond the central axis of the communication path W13. It is. The shield plate 131C and the shield plate 133C further have a free end on the center side in the Y-axis direction of the communication portion 130C on the outer side (X-axis minus direction side) rather than a fixed end connected to the inner wall of the communication portion 130C. It is arranged so as to be inclined.

  In addition, the shielding plates 132C and 134C among the plurality of shielding plates 131C to 134C are substantially semicircular plates that block the region from the lower portion of the axial section of the communication portion 130C to the position above the central axis of the communication passage W13. It is a member. Further, the shielding plates 132C and 134C have the free end on the center side in the Y-axis direction of the communication portion 130C located on the outer side (X-axis minus direction side) with respect to the fixed end connected to the inner wall of the communication portion 130C. It is arranged so as to be inclined. That is, the shielding plates 131C and 133C and the shielding plates 132C and 134C are arranged in directions that intersect each other.

  According to the communication portion 130C according to the third embodiment, even if foreign matter such as water enters the communication portion 130C from the outside of the exterior body of the power storage device, the communication portion 130C includes the shielding plates 131C to 131C. It is possible to easily move the foreign matter hitting 134C to the fixed end side of the shielding plates 131C to 134C. Since there is no passage for foreign matter to enter the interior of the exterior body 200 on the fixed end side of the shielding plates 131C to 134C, it cannot enter the interior of the exterior body 200 unless it moves to the free end side.

  Further, since the inner wall of the communication portion 130C and the shielding plates 131C to 134C intersect at an acute angle on the outer side, a space for storing foreign substances is formed on the outer side of the shielding plates 131C to 134C. be able to. Thereby, even if a foreign object enters the communication portion 130C from the outside, the foreign object can be retained in the space. That is, by having such a structure, it is possible to further reduce the entry of foreign matter into the exterior body 200.

(Embodiment 4)
In addition, if the technical idea of Embodiment 3 is applied to a plurality of shielding plates in combination of the circular flat shielding plate 131B and the ring-shaped shielding plate 132B of Embodiment 2, the shielding member shown in FIG. 5D is obtained. It can also be set as the communication part 130D in which several shielding board 131D, 132D was formed.

  FIG. 5D is a diagram illustrating a configuration of a communication portion of the exterior body according to the fourth embodiment. 5D is a form of the communication part 130 and the communication path W1 shown in FIGS. 1 to 4, respectively. FIG. 5D is a diagram when the communication portion 130D is viewed from the outside in the X-axis direction.

  As illustrated in FIG. 5D, the communication unit 130D includes a plurality of shielding plates 131D and 132D. The communication part 130D forms a communication path W14. In this case, the communication portion 130D includes a shielding plate 131D having a disc portion 131Da and a plurality of connection portions 131Db that connect the disc portion 131Da to the inner wall of the communication portion 130D. The disc part 131Da further has a protrusion 131Dc whose outer peripheral edge is located outward from the center.

  On the other hand, the shielding plate 132D is a ring-shaped plate-like member that extends from the inner periphery of the axial cross section of the communication portion 130D toward the central axis of the communication passage W14D. Furthermore, the shielding plate 132D has an outer peripheral edge and a free end on the central axis side of the communication path W14 on the outer side (X) rather than a fixed end connected to the inner wall of the communication portion 130D. Inclined so as to be located on the negative side of the shaft.

(Embodiment 5)
FIG. 5E is a diagram illustrating a configuration of a communication portion of the exterior body according to Embodiment 5. 5A is a cross-sectional view taken along the line aa of the communication portion 130 shown in FIG. In addition, the communication part 130E and the communication path W15 of FIG. 5E are one form of the communication part 130 and the communication path W1 which are respectively shown in FIGS. FIG. 5E is a diagram when the communication portion 130E is viewed from the outside in the X-axis direction.

  As shown in FIG. 5E, the communication portion 130E has one shielding plate 131E as a shielding member, unlike the communication portions 130A to 130D of the first to third embodiments. That is, the communication part may have a single shielding plate as well as a plurality of shielding plates as long as it is a shielding plate arranged so as to be filled without a gap when the communication part is viewed from the X-axis direction. . The communication portion 130E forms a communication passage W15.

  Specifically, in communication portion 130E of the fifth embodiment, shielding plate 131E is formed so as to partition the space of communication passage W15 in a spiral shape. That is, in the shielding plate 131E, a linear member that connects the reference shaft of the communication passage W15 and the inner wall of the communication portion 130E as the reference passage extends from one end side to the other end side of the communication passage W15. This is the shape of the trajectory when it has rotated more than one round to the center. That is, even in this case, the communication portion 130E is maintained in a state where the communication path W15 is communicated from one end side to the other end side.

  For this reason, even if foreign matter such as water enters the communication portion 130E from the outside of the exterior body 200, the foreign matter rotates in a spiral space when the internal space of the communication portion 130E is partitioned by the shielding plate 131E. If it does not move, it cannot enter the exterior body 200. That is, by having such a structure, it is possible to further reduce the entry of foreign matter into the exterior body 200.

(Other embodiments)
As described above, the power storage device of the present invention has been described based on the embodiment, but the present invention is not limited to this embodiment. Unless it deviates from the meaning of this invention, the form which carried out the various deformation | transformation which those skilled in the art can think to this embodiment, and the structure constructed | assembled combining the component in different embodiment is also contained in the scope of the present invention. .

(1)
In the communication portions 130A to 130E of the first to fifth embodiments, a plurality of shielding plates 131A to 134A, 131B, 132B, 131C to 134C, 131D, 132D or one shielding plate 131E is employed as a shielding member. The shielding member is not limited to a plate-like member. For example, a protrusion that protrudes (expands) from the inner peripheral surface of the communication portion toward the center of the communication path may be employed, or a film-like member may be employed. That is, the shielding member prevents the substance (air, water, foreign matter, etc.) in the communication path from moving in the direction in which the communication path extends (X-axis direction) in the communication portion, and the internal space S1. The member is not limited to a plate-like member as long as the member is arranged so as to maintain communication with the external space S2 through the communication path.

  According to this, the communication path extending in the X-axis direction prevents the substance in the communication path from moving in the X-axis direction, and the communication by the communication path between the internal space and the external space is maintained. Since it has the shielding member arrange | positioned in this, it can prevent that foreign materials, such as water splashing with respect to a communicating path, penetrate | invade into the space inside an exterior body.

(2)
There are four shielding plates 131A to 134A and 131C to 134C formed in the communication portions 130A and 130C of the first and third embodiments, but there is no gap when the communication portion is viewed from the X-axis direction. In addition, since it is only necessary to ensure that the communication part is in communication, for example, it may be a combination of the shielding plates 131A and 132A (131C and 132C), or the shielding plates 132A and 133A (132C). 133C) or two combinations of the shielding plates 133A and 134A (133C and 134C).

(3)
Although communication part 130A-130E of the said Embodiments 1-5 is a cylindrical shape, it is not restricted to a cylindrical shape, What is necessary is just a cylinder shape, for example, a rectangular tube shape may be sufficient as it. In this case, since the plurality of shielding plates need only be formed so as to overlap each other when the communication portion is viewed from the X-axis direction, the shape of the outer periphery of the portion contacting the inner periphery of the communication portions of the plurality of shielding plates However, the shape matches the shape of the inner periphery of the communication portion.

(4)
The plurality of shielding plates 131A to 134A and 131C to 134C of Embodiments 1 and 3 have a shape that alternately closes a substantially half region of the axial cross section of the communication portions 130A and 130C. Not necessarily. That is, in this case, the plurality of shielding plates only need to be arranged so as to overlap each other when the communication portion is viewed from the X-axis direction. It is good also as a shape which closes 1/3 by the side of a direction, and the shape with which the 2nd shielding board plugs the remaining 2/3 of the Y-axis minus direction side of a communicating path.

(5)
The plurality of shielding plates 131A to 134A, 131B, 132B, 131C to 134C, 131D, and 132D of the first to fourth embodiments are arranged so as to overlap each other when the communication portions 130A to 130D are viewed from the X-axis direction. However, if the communication portions 130A to 130D are arranged without gaps when viewed from the X-axis direction, entry of foreign matters such as water that enters linearly can be prevented, so they do not necessarily overlap. . In other words, the plurality of shielding plates 131A to 134A, 131B, 132B, 131C to 134C, 131D, and 132D may have a shape in which the edges on the free end side of each other coincide. Moreover, it does not need to be arranged strictly without a gap when viewed from the X-axis direction.

(6)
In the communication portions 130A to 130E of the first to fifth embodiments, the waterproof film 140 is provided on the inner space S1 side of the exterior body 200, but the waterproof film 140 is not necessarily required. That is, even if the exterior body 200 has no waterproof film 140, the foreign matter that enters in a straight line is caused by the plurality of shielding plates 131A to 134A, 131B, 132B, 131C to 134C, 131D, 132D and the shielding plate 131E. This is useful because it can be prevented.

(7)
Note that in the power storage device 100 of the present embodiment, the exterior body 200 stores a plurality of power storage elements 400, but is not limited thereto, and may be configured to store one power storage element 400.

(8)
The communication paths W11 to W15 of the first to fifth embodiments extend linearly in the X-axis direction, but are not limited to this, and may be bent. In other words, the present invention includes even a bent communication path as long as a shielding plate that prevents foreign substances from moving in the direction in which the communication path extends at least is provided. In the case where the communication path is bent, the angle of the bent portion of the communication path is not limited.

  INDUSTRIAL APPLICABILITY The present invention is useful as a power storage device that allows gas discharge and prevents foreign substances such as water from entering the inside.

100 Power storage device 110 External positive terminal 120 External negative terminal 130, 130A to 130E Communication portions 131A to 134A, 131B, 132B, 131C to 134C, 131D, 132D, 131E Shielding plate 131Ba, 131Da Disk portion 131Bb, 131Db Connection portion 131Dc Projection Portion 140 Waterproof membrane 200 Exterior body 210 Cover body 220 Exterior body main body 300 Bus bar 310 Circuit board 400 Power storage element 410 Container 420 Positive electrode terminal 430 Negative electrode terminal 440 Safety valve 500 Exhaust hose S1 Internal space S2 External space W1, W11 to W15 Conducting path

Claims (9)

One or more power storage elements including a non-aqueous electrolyte;
An exterior body that houses the one or more power storage elements;
With
The exterior body communicates the internal space and the external space of the exterior body, and has a communication portion that forms a communication path extending at least in the first direction,
The communication part is disposed so as to prevent the substance in the communication path from moving in the first direction and to maintain communication between the internal space and the external space by the communication path. A power storage device having a shielding member. One or more power storage elements including a non-aqueous electrolyte;
An exterior body that houses the one or more power storage elements;
With
The exterior body communicates the internal space and the external space of the exterior body, and has a communication portion that forms a communication path extending at least in the first direction,
The communication unit includes a shielding member arranged to fill the communication path without gap when the communication path is viewed from the first direction. The power storage device according to claim 1, wherein the shielding member includes a plurality of shielding plates. The power storage device according to claim 3, wherein the plurality of shielding plates are arranged so as to be inclined such that the free end side thereof is located on the outer side of the exterior body with respect to the fixed end side. The plurality of shielding plates include a first shielding plate and a second shielding plate,
The first shielding plate is a partial region of the region of the communication path when the communication portion is viewed from the first direction, and is on one side of the second direction intersecting the first direction. Arranged to fill the first area,
The second shielding plate is disposed at a position different from the first shielding plate in the first direction, and is a partial region of the region of the communication path, the other side in the second direction The power storage device according to claim 3, wherein the power storage device is disposed so as to fill the second region. The plurality of shielding plates include a first shielding plate and a second shielding plate,
The first shielding plate is a partial area of the communication path area when the communication portion is viewed from the first direction, and fills the first area including the central axis of the communication path. Placed in
The second shielding plate is disposed at a position different from the first shielding plate in the first direction, and is a partial region of the region of the communication path, outside the first region. The power storage device according to claim 3, wherein the power storage device is disposed so as to fill a second region that is a region. The power storage device according to claim 1, wherein the shielding member is formed so as to partition the space of the communication path in a spiral shape. The power storage device according to any one of claims 1 to 7, wherein the communication unit further includes a waterproof film provided closer to the inner space than the shielding member. The waterproof membrane is
By closing the communication path, the internal space of the exterior body is in a sealed state,
The power storage device according to claim 8, wherein when the internal pressure of the exterior body exceeds a predetermined pressure, the communication path is brought into a communication state by being damaged.

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