WO2022254932A1 - Power storage device - Google Patents

Power storage device Download PDF

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Publication number
WO2022254932A1
WO2022254932A1 PCT/JP2022/015749 JP2022015749W WO2022254932A1 WO 2022254932 A1 WO2022254932 A1 WO 2022254932A1 JP 2022015749 W JP2022015749 W JP 2022015749W WO 2022254932 A1 WO2022254932 A1 WO 2022254932A1
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WO
WIPO (PCT)
Prior art keywords
power storage
exterior body
storage device
duct
storage element
Prior art date
Application number
PCT/JP2022/015749
Other languages
French (fr)
Japanese (ja)
Inventor
敦之 小西
泰行 岩嶋
晃希 前田
Original Assignee
株式会社Ｇｓユアサ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ｇｓユアサ filed Critical 株式会社Ｇｓユアサ
Priority to JP2023525628A priority Critical patent/JPWO2022254932A1/ja
Publication of WO2022254932A1 publication Critical patent/WO2022254932A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H01G11/12—Stacked hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/14—Arrangements or processes for adjusting or protecting hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/358—External gas exhaust passages located on the battery cover or case
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/367—Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a power storage device including power storage elements.
  • Patent Literature 1 discloses a battery module (power storage device) including secondary batteries (power storage elements) arranged in a line.
  • a duct for collecting and guiding gas discharged from the gas discharge valve is fixed to the lid of each power storage element, and adjacent ducts are connected.
  • a conventional power storage device In a conventional power storage device, generally, a plurality of rectangular power storage elements housed in an exterior body, like the power storage device of Patent Document 1, are arranged in the thickness direction (the direction in which the long sides face each other), Thereby, the gas discharge valves of the plurality of storage elements are arranged in a row. Furthermore, a member forming a gas flow path, such as an exhaust duct, is arranged above the gas discharge valves arranged in a row. In other words, the storage elements are arranged in an upright state, and an exhaust duct is arranged above them. Therefore, for example, there arises a problem that the size of the power storage device in the height direction becomes relatively large.
  • the present invention has been made by the inventor of the present application with a new focus on the above problem, and an object of the present invention is to provide a power storage device that can be made thinner.
  • a power storage device includes a power storage element including a gas discharge valve capable of discharging internal gas, an exterior body housing the power storage element in a posture in which the gas discharge valve faces a first direction, an exhaust duct for guiding the gas exhausted from the gas exhaust valve to the outside of the exterior body, and when viewed from the first direction, the power storage element extends in a second direction orthogonal to the first direction.
  • the exhaust duct has an elongated shape, and has a duct body extending in the second direction and a connection portion projecting from the duct body toward the gas discharge valve, and an opening of the connection portion. is disposed in a posture covering the gas discharge valve.
  • FIG. 1 is a perspective view showing the appearance of a power storage device according to an embodiment.
  • FIG. 2 is an exploded perspective view showing the internal configuration of the power storage unit in the power storage device according to the embodiment.
  • FIG. 3 is an exploded perspective view showing components of the power storage unit according to the embodiment.
  • FIG. 4 is an external perspective view showing the external appearance of the exhaust duct according to the embodiment.
  • FIG. 5 is a perspective view showing a state in which the exhaust duct and busbar frame according to the embodiment are combined.
  • FIG. 6 is an exploded perspective view of the power storage unit according to the embodiment.
  • FIG. 7 is a first cross-sectional view of the power storage unit according to the embodiment.
  • FIG. 8 is a second cross-sectional view of the power storage unit according to the embodiment.
  • FIG. 9 is a plan view showing a schematic configuration of a power storage device according to a modification of the embodiment.
  • a power storage device includes a power storage element including a gas discharge valve capable of discharging internal gas, an exterior body housing the power storage element in a posture in which the gas discharge valve faces a first direction, an exhaust duct for guiding the gas exhausted from the gas exhaust valve to the outside of the exterior body, and when viewed from the first direction, the power storage element extends in a second direction orthogonal to the first direction.
  • the exhaust duct has an elongated shape, and has a duct body extending in the second direction and a connection portion projecting from the duct body toward the gas discharge valve, and an opening of the connection portion. is disposed in a posture covering the gas discharge valve.
  • the duct body of the exhaust duct is provided along the longitudinal direction of the storage element when viewed from the side of the gas discharge valve (side view), and the connecting portion protruding from the duct body serves to discharge the gas. It is placed in a posture that covers the valve. Therefore, the gas discharged from the gas discharge valve is efficiently guided to the duct body. Furthermore, since the outlet (duct end) of the exhaust duct can be arranged on the side in the longitudinal direction, the power storage device can be placed downstream from the duct end without increasing the size of the power storage device in the lateral direction orthogonal to the longitudinal direction. An exhaust pipe or the like can be arranged. Therefore, by making the longitudinal direction of the storage element horizontal, it is possible to configure a low-profile (thin in the height direction) power storage device. Thus, the power storage device according to this aspect can be made thinner.
  • the power storage device further includes a bus bar connected to the electrode terminal arranged on the surface of the power storage element provided with the gas discharge valve, and a bus bar frame holding the bus bar, and the exhaust duct is connected to the connecting portion. passes through the exhaust opening of the busbar frame, and the opening of the connecting portion is arranged in a posture that covers the gas exhaust valve.
  • the exhaust opening of the busbar frame can regulate the position of the connecting portion, so that the connecting portion can be arranged with respect to the gas exhaust valve with higher accuracy.
  • the busbar frame includes a wall portion provided around the exhaust opening, and the wall portion extends along at least one of both ends in a third direction orthogonal to the first direction and the second direction.
  • the end may have a notch.
  • the position of the connecting portion is more reliably regulated by the wall portion. Furthermore, since the notch is provided at the end of the wall in the third direction, after the tip of the connection is moved inward from the exhaust opening from the third direction, the connection is connected to the gas exhaust valve.
  • the exhaust duct can be arranged by moving in the direction of approaching. Therefore, in the power storage device, even if the space near the gas exhaust valve is narrow, the exhaust duct can be arranged. This suppresses an increase in width in the depth direction (first direction) of the power storage device.
  • a plurality of the power storage elements are arranged in a third direction orthogonal to the first direction and the second direction, and the connecting portion is connected to the gas discharge valves of two or more of the plurality of power storage elements.
  • the power storage device may further include a mounting member for mounting the power storage element to the exterior body, and the exhaust duct may be arranged with the connecting portion mounted to the mounting member.
  • the connecting portion of the exhaust duct can be attached to the member attached to the power storage element, so the connecting portion can be arranged more accurately with respect to the gas exhaust valve.
  • the connecting portion may be arranged through a wall portion of the exterior body, and the duct body may be arranged outside the exterior body.
  • the gas discharged from the gas discharge valve is quickly guided to the duct main body outside the exterior body via the connecting portion. Therefore, it becomes difficult for the heat of the gas to be conducted to the electric storage element.
  • the longitudinal direction of the exterior body of the power storage device is defined as the X-axis direction.
  • the direction in which the electric storage elements and the busbars are arranged, or the direction in which the main body and lid of the container for the electric storage elements are arranged is defined as the Y-axis direction.
  • the Z-axis direction is defined as the direction in which the main body of the exterior body and the lid are aligned, the direction in which the long side faces of the container of the electric storage element face each other, or the up-and-down direction.
  • X-axis direction, Y-axis direction, and Z-axis direction are directions that cross each other (perpendicularly in this embodiment).
  • the Z-axis direction may not be the vertical direction, but for convenience of explanation, the Z-axis direction will be described below as the vertical direction.
  • the X-axis plus direction indicates the arrow direction of the X-axis
  • the X-axis minus direction indicates the direction opposite to the X-axis plus direction.
  • the positive Y-axis direction may also be referred to as the first direction
  • the X-axis direction may also be referred to as the second direction
  • the Z-axis direction may also be referred to as the third direction.
  • Expressions indicating relative directions or orientations, such as parallel and orthogonal also include cases where the directions or orientations are not strictly speaking.
  • two directions are orthogonal not only means that the two directions are completely orthogonal, but also substantially orthogonal, that is, for example, a difference of about several percent It is also meant to include
  • FIG. 1 is a perspective view showing the appearance of a power storage device 1 according to an embodiment.
  • FIG. 2 is an exploded perspective view showing the internal configuration of the power storage unit 10 in the power storage device 1 according to the embodiment.
  • FIG. 3 is an exploded perspective view showing components of the power storage unit 10 according to the embodiment. In FIG. 3 , illustration of the second exterior body 120 included in the exterior body 100 is omitted, and each component housed in the exterior body 100 is illustrated separately.
  • the power storage device 1 is a device that can charge electricity from the outside and discharge electricity to the outside, and has a substantially rectangular parallelepiped shape in the present embodiment.
  • the power storage device 1 is, for example, a battery module (assembled battery) used for power storage or power supply.
  • the power storage device 1 is, for example, an automobile, a motorcycle, a watercraft, a ship, a snowmobile, an agricultural machine, a construction machine, or a rolling stock for an electric railway. It is used as a battery etc.
  • Examples of such vehicles include electric vehicles (EV), hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), and gasoline vehicles.
  • Examples of railway vehicles for the electric railway include electric trains, monorails, linear motor cars, and hybrid trains having both diesel engines and electric motors.
  • the power storage device 1 can also be used as a stationary battery or the like for home use or for a power generator.
  • the power storage device 1 includes a power storage unit 10 and a control unit 20.
  • the portion of the power storage device 1 that has the power storage element 400 is referred to as power storage unit 10
  • the portion that includes a control device for controlling power storage element 400 is referred to as control unit 20 .
  • the energy storage unit 10 includes an exterior body 100, an energy storage element 400 housed in the exterior body 100, spacers 510 and 520, a mounting member 610, an end plate 620, a busbar frame 700, a busbar 800, an exhaust duct 200, and a control unit. 20 and so on.
  • the exterior body 100 has a pair of (positive electrode side and negative electrode side) external terminals 21 and 22 and a connector 23 .
  • the exterior body 100 is a box-shaped (substantially rectangular parallelepiped) container (module case) that constitutes the housing of the power storage device 1 .
  • the exterior body 100 is arranged outside the power storage elements 400 and the like, fixes the power storage elements 400 and the like at predetermined positions, and protects them from impacts and the like.
  • the exterior body 100 has a first exterior body 110 and a second exterior body 120 .
  • the first exterior body 110 is a flat rectangular member that constitutes the main body of the exterior body 100, and is a member to which the power storage element 400 and the like are fixed.
  • the second exterior body 120 is a bottomed rectangular cylindrical member that constitutes the lid of the exterior body 100, is arranged in the positive Z-axis direction of the first exterior body 110, and is connected to the first exterior body 110. cover the power storage element 400 and the like.
  • An opening is formed in the second exterior body 120 in the negative direction of the Z axis, and the first exterior body 110 is arranged so as to block the opening of the second exterior body 120 .
  • a gasket (not shown) is provided between the peripheral edge of the first exterior body 110 to which the plurality of power storage elements 400 and the exhaust duct 200 are fixed and the peripheral edge of the second exterior body 120. are interposed and fastened by a plurality of sets of bolts and nuts. As a result, airtightness is ensured at the joint portion between the first exterior body 110 and the second exterior body 120 .
  • the method of connecting (joining) the first exterior body 110 and the second exterior body 120 may be another method such as adhesion, caulking, welding, heat sealing, ultrasonic welding, or the like.
  • the first exterior body 110 is made of, for example, a metal member such as stainless steel, aluminum, an aluminum alloy, iron, or a plated steel plate, or a metal member subjected to insulation treatment such as insulating coating.
  • the second exterior body 120 is made of, for example, polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE)), polyethylene terephthalate Talat (PET), polybutylene terephthalate (PBT), polyether ether ketone (PEEK), tetrafluoroethylene/perfluoroalkyl vinyl ether (PFA), polytetrafluoroethylene (PTFE), polyether sulfone (PES), ABS resin Alternatively, it is formed of a resin member (insulating member) such as a composite material thereof.
  • the first exterior body 110 may be made of the same resin member as the second exterior body 120, but is preferably made of a highly rigid member.
  • a reinforcing member that reinforces the first exterior body 110 may be arranged on the back surface side (Z-axis negative direction side) of the first exterior body 110 .
  • the second exterior body 120 may be made of the same metal member as the first exterior body 110 .
  • the power storage element 400 is a secondary battery (single battery) capable of charging and discharging electricity.
  • power storage element 400 is a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery.
  • the power storage element 400 has a flat rectangular parallelepiped shape (square shape), and has four side surfaces including a pair of long side surfaces 410 and a pair of short side surfaces 411 (see FIG. 3).
  • two power storage elements 400 are arranged in the Z-axis direction and the X-axis direction with the two power storage elements 400 placed horizontally (with the long side surfaces 410 of the power storage elements 400 facing the Z-axis direction).
  • each of the plurality of power storage elements 400 has a gas discharge valve 413 for discharging internal gas to the outside when the internal pressure rises excessively.
  • each of the plurality of power storage elements 400 is arranged with the gas exhaust valve 413 directed in the negative Y-axis direction.
  • the Y-axis minus direction is an example of the first direction.
  • the shape of the power storage element 400 is not limited to the rectangular shape described above, and may be other shapes such as a polygonal columnar shape, an elliptical columnar shape, and an oval columnar shape. In either case, it suffices if the shape is elongated in the X-axis direction when viewed from the Y-axis minus direction.
  • the X-axis direction is an example of the second direction.
  • the storage element 400 is not limited to a non-aqueous electrolyte secondary battery, and may be a secondary battery other than a non-aqueous electrolyte secondary battery, or may be a capacitor.
  • the power storage element 400 may be a primary battery that can use stored electricity without being charged by the user, instead of a secondary battery.
  • the storage element 400 may be a pouch-type storage element.
  • two power storage elements 400 stacked in the Z-axis direction are attached to the first exterior body 110 by one attachment member 610 .
  • spacer 520 , power storage element 400 , spacer 510 , power storage element 400 , spacer 520 , and end plate 620 are stacked in this order from the side closer to first exterior body 110 .
  • These elements stacked in the Z-axis direction are collectively attached to the first exterior body 110 by the attachment member 610 .
  • mounting holes are provided at both ends of the mounting member 610 in the Y-axis direction, and bolts 115 fixed to the first exterior body 110 pass through the mounting holes and are fastened to nuts (not shown). be done.
  • Attachment member 610 is connected to first exterior body 110 and also functions as a restraining member that restrains power storage element 400 in the facing direction of a pair of long side surfaces 410 , which are portions of power storage element 400 that tend to swell.
  • Four groups of power storage elements 400 attached to the first exterior body 110 in this manner are arranged in the X-axis direction on the first exterior body 110 .
  • the method of connecting the mounting member 610 and the first exterior body 110 is not limited to fastening with bolts and nuts, and various methods such as fastening with rivets, welding, press-fitting, or caulking can be employed.
  • the mounting member 610 and the end plate 620 are formed of a metal member or a metal member subjected to insulation treatment such as insulating coating, for example, like the first exterior body 110 .
  • the spacers 510 and 520 are made of, for example, a resin material such as PC, PP, or PE, or a highly heat-resistant material such as a damper material, like the second exterior body 120 .
  • Materials forming the mounting member 610, the end plate 620, and the spacers 510 and 520 are not limited to the above examples, and all these members may be formed of metal, resin, or the like.
  • the bus bar 800 is a plate-shaped conductive member connected to the power storage element 400 .
  • bus bar 800 is arranged in the Y-axis negative direction of multiple power storage elements 400 and is joined to electrode terminals 420 of multiple power storage elements 400 .
  • bus bar 800 and electrode terminal 420 of power storage element 400 are connected (joined) by welding, but may be connected (joined) by bolting or the like.
  • the bus bar 800 is made of, for example, a conductive member made of metal such as aluminum, aluminum alloy, copper, copper alloy, nickel, or a combination thereof, or a conductive member other than metal.
  • two power storage elements 400 aligned in the Z-axis direction are connected in parallel by a plurality of bus bars 800, and four power storage element 400 groups are connected in series.
  • the electrical connection form of these eight power storage elements 400 is not limited to this, and all power storage elements 400 may be connected in series, or may be connected in another form.
  • the busbar frame 700 is a member that holds the busbar 800 .
  • the busbar frame 700 can regulate the position of the busbar 800 .
  • busbar frame 700 is an insulating member that electrically insulates busbar 800 from other members.
  • the busbar frame 700 is made of, for example, any electrically insulating resin material or the like that can be used for the second exterior body 120 described above.
  • the busbar frame 700 is arranged on the Y-axis negative direction side of the plurality of power storage elements 400 and is positioned with respect to the plurality of power storage elements 400 .
  • a plurality of busbars 800 and electric wires (not shown) are positioned on the busbar frame 700 .
  • bus bar 800 is positioned with respect to the plurality of power storage elements 400 and joined to electrode terminals 420 of the plurality of power storage elements 400 .
  • busbar frame 700 further has a function of regulating the position of exhaust duct 200 and has a portion for attaching busbar frame 700 to attachment member 610 .
  • the exhaust duct 200 is a member for guiding the gas exhausted from the gas exhaust valve 413 to the outside of the exterior body 100 when the gas exhaust valve 413 of the storage element 400 is opened (opened).
  • the exhaust duct 200 has a duct body 201 that forms a gas flow path.
  • the exhaust duct 200 is fixed to the first exterior body 110, and is fixed to the first exterior body 110 by tightening a nut 130 on a bolt that partially penetrates the exhaust duct 200 (see FIG. 2).
  • the exhaust duct 200 is, for example, a tubular member elongated in the X-axis direction and made mainly of a resin material such as PC, PP, or PE.
  • a plurality of openings are provided as entrances to the In this embodiment, the duct end portion 205 that is the gas outlet of the exhaust duct 200 is connected to the ventilation chamber 150 (see FIG. 2) provided in the second exterior body 120 .
  • At least a portion of the exhaust duct 200 may be made of a material other than resin, such as a highly heat-resistant metal.
  • Ventilation chamber 150 is a portion that allows gas discharged from each storage element 400 to be released to the outside of exterior body 100 and prevents foreign matter such as water or dust from entering interior of exterior body 100 . .
  • the ventilation chamber 150 is formed by covering a recessed portion provided at the end of the second exterior body 120 with a ventilation chamber cover 121 .
  • a wall portion forming the bottom surface of the ventilation chamber 150 is provided with a first tubular portion 151 that communicates the inside of the ventilation chamber 150 with the inside of the exterior body 100 (excluding the ventilation chamber 150).
  • an exhaust port 158 that communicates the inside of the ventilation chamber 150 with the outside of the exterior body 100 is provided in the wall portion of the ventilation chamber 150 on the negative side of the X axis.
  • the second tubular portion 152 of the membrane support member 153 is inserted into the first tubular portion 151 from above, and the duct end portion 205 is inserted from below the first tubular portion 151 .
  • the duct end portion 205 and the membrane support member 153 are brought into communication with each other via the first cylindrical portion 151 .
  • a membrane member 157 is arranged on the membrane support member 153 , and the membrane member 157 is supported by the membrane support member 153 in a posture that closes the gas flow path formed by the second tubular portion 152 . Therefore, even if foreign matter enters the inside of the ventilation chamber 150 in normal times, the film member 157 substantially prevents the foreign matter from entering the inside of the exterior body 100 .
  • the control unit 20 is a device having a control device that controls the power storage element 400 and is connected to the power storage unit 10 inside the exterior body 100 .
  • the control unit 20 is electrically connected to external terminals 21 and 22 arranged on the exterior body 100 , and the power storage device 1 (power storage unit 10 ) is connected to the outside through the pair of external terminals 21 and 22 . Charges electricity from and discharges electricity to the outside.
  • the external terminals 21 and 22 are made of a conductive member made of metal such as aluminum, aluminum alloy, copper, copper alloy, or the like.
  • the control unit 20 is also electrically connected to a connector 23 arranged on the exterior body 100 . Connector 23 is connected to, for example, a cable extending from a higher-level control device that controls power storage device 1 .
  • the control unit 20 controls charging and discharging of the power storage unit 10 according to control signals received via the cable and connector 23 .
  • FIG. 4 is an external perspective view showing the external appearance of exhaust duct 200 according to the embodiment.
  • FIG. 5 is a perspective view showing a state in which exhaust duct 200 and busbar frame 700 according to the embodiment are combined.
  • FIG. 6 is an exploded perspective view of power storage unit 10 according to the embodiment.
  • FIG. 6 illustrates a state in which the busbar frame 700 and the exhaust duct 200 are separated from the plurality of power storage elements 400 fixed to the first exterior body 110 .
  • FIG. 7 is a first cross-sectional view of power storage unit 10 according to the embodiment, and FIG.
  • FIG. 8 is a second cross-sectional view of power storage unit 10 according to the embodiment. Specifically, FIG. 7 shows a cross section of part of the power storage unit 10 on the YZ plane passing through the VII-VII line in FIG. 6, and FIG. 8 shows the XY plane passing through the VIII-VIII line in FIG. , a partial cross-section of the electricity storage unit 10 is shown.
  • the exhaust duct 200 has a duct body 201 and a connecting portion 210.
  • the duct body 201 is a member that forms a gas flow path extending in the X-axis direction.
  • the connecting portion 210 is provided so as to protrude from the duct body 201 toward the gas discharge valve 413 .
  • the connecting portion 210 has an opening 211 at the tip in the projecting direction, and is cylindrical (tubular). As shown in FIGS. 6 and 7 , the opening 211 is arranged in a posture that covers the gas exhaust valve 413 of the storage element 400 .
  • a duct body 201 elongated in the X-axis direction has four connecting portions 210 arranged side by side in the X-axis direction at equal intervals.
  • each of the four connection parts 210 is arranged at a position facing two power storage elements 400 stacked in the Z-axis direction, and the gas discharge valves 413 of the two power storage elements 400 are arranged. The gas discharged from each can be guided to the duct body 201 .
  • connecting portion 210 is arranged to penetrate busbar frame 700 and mounting member 610 arranged between duct main body 201 and power storage element 400 .
  • the busbar frame 700 has an exhaust opening 710 through which the connecting portion 210 penetrates.
  • a wall portion 711 is provided. Wall portion 711 is erected on busbar frame 700 along the axial direction (Y-axis direction) of connecting portion 210 .
  • the busbar frame 700 configured in this manner is provided with mounting projections 705 for mounting the busbar frame 700 to the mounting member 610 .
  • the mounting projection 705 is inserted into the engagement hole 615 (see FIG.
  • the mounting member 610 While its outer diameter is reduced, and after the insertion is completed, the outer diameter expands due to the elastic force. By (restoring), it engages with the engagement hole 615 .
  • the mounting protrusions 705 that engage with the engagement holes 615 are arranged on both sides of the exhaust opening 710 in the X-axis direction. , positioning (positional regulation) with respect to the plurality of power storage elements 400 is performed with high accuracy.
  • the mounting member 610 has an exhaust opening 611 at a position facing the gas exhaust valve 413, through which the connecting portion 210 passes. It is arranged at a position aligned with the exhaust opening 710 of the frame 700 in the Y-axis direction. Connection portion 210 passes through exhaust opening 710 of busbar frame 700 and exhaust opening 611 of mounting member 610 , and opening 211 of connection portion 210 is disposed at a position covering gas exhaust valve 413 .
  • the exhaust duct 200 has a structure that mechanically engages with the mounting member 610 configured as described above. Specifically, as shown in FIGS.
  • the connecting portion 210 of the exhaust duct 200 has an engaging portion 215 at a portion that is inserted into the exhaust opening 611 of the mounting member 610. ing.
  • the engaging portion 215 is a claw-shaped portion that protrudes outward from the outer peripheral surface of the connecting portion 210. As shown in FIG. It is formed to engage with the periphery of the exhaust opening 611 .
  • each of the four connecting portions 210 has a pair of engaging portions 215 that engage with the periphery of the corresponding exhaust opening 611 .
  • Each of the four connecting portions 210 is attached to the mounting member 610 corresponding to the connecting portion 210 by engaging with the periphery of the exhaust opening 611 .
  • power storage device 1 includes power storage element 400 having gas discharge valve 413 capable of discharging internal gas, power storage element 400, and gas discharge valve 413 in the first direction (Y and an exhaust duct 200 for guiding the gas discharged from the gas exhaust valve 413 to the outside of the exterior body 100 .
  • the power storage element 400 When viewed from the Y-axis direction, the power storage element 400 has an elongated shape in a second direction (X-axis direction) orthogonal to the Y-axis direction.
  • the exhaust duct 200 has a duct body 201 forming a gas flow path extending in the X-axis direction, and a connecting portion 210 projecting from the duct body 201 toward the gas discharge valve 413 .
  • the opening 211 of the connecting portion 210 is arranged in a posture that covers the gas exhaust valve 413 .
  • the duct body 201 of the exhaust duct 200 is provided along the longitudinal direction of the storage element 400 when viewed from the side of the gas discharge valve 413 (side view), and the connection protrudes from the duct body 201.
  • a portion 210 is arranged in a posture covering the gas exhaust valve 413 . Therefore, the gas discharged from the gas discharge valve 413 is efficiently guided to the duct main body 201 .
  • the outlet (duct end portion 205) of exhaust duct 200 can be arranged on the side in the longitudinal direction, so that the size of power storage device 1 in the lateral direction (Z-axis direction) perpendicular to the longitudinal direction can be increased.
  • the exhaust pipe 159 or the like located downstream of the duct end 205 can be arranged without the duct end 205 . Therefore, for example, by making the longitudinal direction of the storage element 400 horizontal, the storage device 1 can be configured to be short (thin in the height direction). As described above, the power storage device 1 according to the present embodiment can be made thinner.
  • power storage device 1 further includes bus bar 800 connected to electrode terminal 420 arranged on the side surface of power storage element 400 on which gas discharge valve 413 is provided, and bus bar frame 700 holding bus bar 800.
  • bus bar 800 is arranged such that connecting portion 210 passes through exhaust opening 710 of busbar frame 700 and opening 211 of connecting portion 210 covers gas exhaust valve 413 .
  • the exhaust opening 710 of the busbar frame 700 can regulate the position of the connecting portion 210, so that the connecting portion 210 can be arranged with respect to the gas exhaust valve 413 with higher accuracy. Moreover, since the member that obtains such an effect is the busbar frame 700 , there is no need to separately use a member for regulating the position of the connection portion 210 . This is advantageous for thinning the power storage device 1 .
  • the busbar frame 700 includes a wall portion 711 provided around the exhaust opening 710 .
  • the wall portion 711 has a notch portion 712 on at least one of both ends in a third direction (Z-axis direction) perpendicular to the first direction (Y-axis direction) and the second direction (X-axis direction). have.
  • the wall portion 711 more reliably restricts the position of the connection portion 210 . Furthermore, since the notch portion 712 is provided at the end portion of the wall portion 711 in the Z-axis direction, the tip portion of the connection portion 210 is moved inward from the exhaust opening portion 710 from the Z-axis direction side, and then connected. By moving the portion 210 in a direction approaching the gas exhaust valve 413, the exhaust duct 200 can be arranged. In this embodiment, as shown in FIG. 6, a notch portion 712 is provided at the upper end portion of the wall portion 711 .
  • the exhaust duct 200 is moved forward (Y-axis plus direction). 200 can be placed in the correct position. Therefore, in the power storage device 1, even if the space in the vicinity of the gas discharge valve 413 (on the Z-axis negative direction side of the power storage element 400) is narrow, or if some member is arranged at a position facing the gas discharge valve 413 Even if it is, the arrangement of the exhaust duct 200 is possible. This suppresses an increase in width in the depth direction (Y-axis direction) of power storage device 1 .
  • a plurality of power storage elements 400 are arranged in the Z-axis direction, and as shown in FIG. It is formed in a shape that covers the valve 413 collectively.
  • a single connecting portion 210 can form a channel for guiding gas discharged from a plurality of gas discharge valves 413 arranged in the Z-axis direction to the duct main body 201 . Therefore, the gas from the plurality of power storage elements 400 can be discharged to the outside of the exterior body 100 with the exhaust duct 200 having a simple structure.
  • power storage device 1 further includes mounting member 610 for mounting power storage element 400 to exterior body 100 .
  • the exhaust duct 200 is arranged with the connection portion 210 attached to the attachment member 610 .
  • the connecting portion 210 of the exhaust duct 200 can be attached to the member attached to the power storage element 400 , so the connecting portion 210 can be arranged with high accuracy with respect to the gas exhaust valve 413 .
  • the tip of the connecting portion 210 is inserted into the exhaust opening 611, and the claw-shaped engaging portion 215 provided at the tip is inserted into the exhaust opening 611.
  • the connecting portion 210 is attached to the attachment member 610 by engaging the peripheral edge of the . Therefore, the possibility that the distal end of the connecting portion 210 will slip out of the exhaust opening 611 due to vibration, impact, or the pressure of the gas exhausted from the gas exhaust valve 413 is reduced.
  • the gas discharged from gas discharge valve 413 can be more efficiently or reliably guided to the outside of exterior body 100 .
  • the power storage device 1 may have a configuration different from the configurations shown in FIGS. .
  • a modified example of the configuration of exhaust duct 200 and its surroundings will be described with reference to FIG. 9, focusing on differences from the above embodiment.
  • FIG. 9 is a plan view showing a schematic configuration of a power storage device 1a according to a modification of the embodiment.
  • each component is simply illustrated to clearly show the positional relationship of the plurality of components in power storage device 1 a , such as the rough outline of exterior body 100 being represented by a dotted rectangle.
  • a power storage device 1a includes a power storage unit 10a and a control unit 20.
  • the power storage unit 10 a includes a power storage element 400 , an exterior body 100 that houses the power storage element 400 , and an exhaust duct 200 a for guiding the gas discharged from the gas exhaust valve 413 of the power storage element 400 to the outside of the exterior body 100 .
  • the exhaust duct 200 a has a duct body 201 forming a gas flow path extending in the X-axis direction, and a connecting portion 210 projecting from the duct body 201 toward the gas discharge valve 413 .
  • the opening 211 of the connecting portion 210 is arranged in a posture that covers the gas exhaust valve 413 .
  • the power storage device 1a according to the present modification is in common with the power storage device 1 according to the embodiment.
  • connection part 210 is arranged through the wall of the exterior body 100 , and the duct main body 201 is arranged outside the exterior body 100 .
  • the power storage device 1a according to the present modification differs from the power storage device 1 according to the embodiment.
  • the gas discharged from the gas discharge valve 413 is quickly guided to the duct main body 201 arranged outside the exterior body 100 via the connecting portion 210. Therefore, the heat of the gas is less likely to be transferred to the storage element 400 .
  • the second exterior body 120 of the exterior body 100 is a bottomed rectangular tubular member having an opening formed in the negative direction of the Z axis
  • the first exterior body 110 is the second exterior body.
  • 120 is assumed to be a flat rectangular member that closes the opening.
  • the first exterior body 110 is a bottomed rectangular cylindrical member with an opening formed in the positive direction of the Z axis
  • the second exterior body 120 is a flat rectangular shape that closes the opening of the first exterior body 110 . It may be a shaped lid or any other shape.
  • the power storage element 400 is attached to the exterior body 100 by the mounting member 610 (see FIG. 3) having a shape that straddles the power storage element 400 in the Y-axis direction
  • the member for attaching the power storage element 400 to the exterior body 100 is not described.
  • the shape is not particularly limited.
  • the power storage element 400 may be attached to the exterior body 100 by an attachment member having a shape that straddles the power storage element 400 in the X-axis direction.
  • the power storage device 1 does not have to include the mounting member 610 .
  • the one or more power storage elements can be stored without using a member such as the mounting member 610.
  • the element 400 can be substantially fixed at a predetermined position of the outer package 100.
  • the mounting structure of the connecting portion 210 to the mounting member 610 is not limited to the structure shown in FIG.
  • the connecting portion 210 is attached to the mounting member 610 by engaging claws provided on the periphery of the exhaust opening 611 of the mounting member 610 with recesses or holes provided on the outer peripheral surface of the connecting portion 210 .
  • Connecting portion 210 may be attached to attachment member 610 by a method other than engagement, such as welding, adhesion, press-fitting, fitting, or fastening.
  • the duct end portion 205 may be arranged so as to be exposed from the exterior body 100, and a member such as an exhaust hose may be connected to the duct end portion 205 for guiding the gas discharged from the exhaust duct 200 to a predetermined position. .
  • the exterior body provided in the power storage device 1 does not need to be a highly airtight case-like structure like the exterior body 100 shown in FIG. 1 and the like.
  • the exterior body provided in the power storage device 1 may be arranged outside the power storage element 400 and have a function of holding the power storage element 400, the exhaust duct 200, and the like at predetermined positions.
  • a structure composed of a combination of walls in which one or more holes (openings) are formed, or a structure composed of a combination of frames may be employed as the exterior body provided for power storage device 1 .
  • the power storage device 1 does not need to include all the components described above.
  • power storage device 1 may not include busbar frame 700, spacer 510 or 520, end plate 620, or the like.
  • Only one power storage element 400 may be arranged in the Z-axis direction, or three or more may be arranged.
  • a plurality of connecting portions 210 may cover the gas discharge valves 413 of the respective power storage elements 400 .
  • the wall portion 711 may not have the notch portion 712 .
  • the busbar frame 700 may not have the wall portion 711 .
  • the present invention can be applied to a power storage device having a power storage element such as a lithium ion secondary battery.
  • Reference Signs List 1 1a power storage device 10, 10a power storage unit 100 exterior body 110 first exterior body 120 second exterior body 200, 200a exhaust duct 201 duct body 205 duct end portion 210 connection portion 211 opening 215 engagement portion 400 storage element 410 length Side 411 Short Side 413 Gas Exhaust Valve 420 Electrode Terminal 610 Mounting Member 611, 710 Exhaust Opening 615 Engagement Hole 700 Busbar Frame 705 Mounting Projection 711 Wall 712 Notch 800 Busbar

Abstract

This power storage device comprises: a power storage element provided with a gas discharge valve which can discharge a gas therein; an exterior body which accommodates the power storage element in an orientation in which the gas discharge valve faces a first direction; and a discharge duct for guiding the gas discharged from the gas discharge valve to the outside of the exterior body. When viewed in a first direction, the power storage element has a long shape in a second direction perpendicular to the first direction. The discharge duct has: a duct body extending in the second direction; and a connection section which protrudes from the duct body toward the gas discharge valve. An opening section of the connection section is disposed in an orientation covering the gas discharge valve.

Description

蓄電装置power storage device
　本発明は、蓄電素子を備える蓄電装置に関する。 The present invention relates to a power storage device including power storage elements.
　従来、蓄電素子を備える蓄電装置では、蓄電素子のガス排出弁から排出されたガスを外装体の外部に導くための構成が備えられている。特許文献１には、一列に並べられた二次電池（蓄電素子）を備える電池モジュール（蓄電装置）が開示されている。この蓄電装置において、各蓄電素子の蓋には、ガス排出弁から排出されるガスを収集して案内するダクトが固定されており、隣り合うダクト同士は連結される。 Conventionally, a power storage device including a power storage element has a configuration for guiding gas discharged from a gas discharge valve of the power storage element to the outside of the exterior body. Patent Literature 1 discloses a battery module (power storage device) including secondary batteries (power storage elements) arranged in a line. In this power storage device, a duct for collecting and guiding gas discharged from the gas discharge valve is fixed to the lid of each power storage element, and adjacent ducts are connected.
特開２０１２－９９４３２号公報JP 2012-99432 A
　従来の蓄電装置では、一般的には、上記特許文献１の蓄電装置のように、外装体に収容された複数の角形の蓄電素子が、その厚み方向（長側面の対向方向）に並べられ、これにより、複数の蓄電素子のガス排出弁は一列に並べられる。さらに、一列に並べられたガス排出弁の上方に排気ダクト等のガスの流路を形成する部材が配置される。つまり、各蓄電素子は立てられた状態で並べられ、かつ、その上方に排気ダクトが配置される。従って、例えば、蓄電装置の高さ方向のサイズが比較的に大きくなるという問題が生じる。 In a conventional power storage device, generally, a plurality of rectangular power storage elements housed in an exterior body, like the power storage device of Patent Document 1, are arranged in the thickness direction (the direction in which the long sides face each other), Thereby, the gas discharge valves of the plurality of storage elements are arranged in a row. Furthermore, a member forming a gas flow path, such as an exhaust duct, is arranged above the gas discharge valves arranged in a row. In other words, the storage elements are arranged in an upright state, and an exhaust duct is arranged above them. Therefore, for example, there arises a problem that the size of the power storage device in the height direction becomes relatively large.
　本発明は、本願発明者が上記課題に新たに着目してなされたものであり、薄型化が可能な蓄電装置を提供することを目的とする。 The present invention has been made by the inventor of the present application with a new focus on the above problem, and an object of the present invention is to provide a power storage device that can be made thinner.
　本発明の一態様に係る蓄電装置は、内部のガスを排出可能なガス排出弁を備える蓄電素子と、前記蓄電素子を、前記ガス排出弁が第一方向を向く姿勢で収容する外装体と、前記ガス排出弁から排出されたガスを前記外装体の外部に導くための排気ダクトとを備え、前記蓄電素子は、前記第一方向から見た場合、前記第一方向に直交する第二方向に長尺状の形状を有し、前記排気ダクトは、前記第二方向に延びるダクト本体と、前記ダクト本体から、前記ガス排出弁に向けて突出する接続部とを有し、前記接続部の開口部が前記ガス排出弁を覆う姿勢で配置されている。 A power storage device according to an aspect of the present invention includes a power storage element including a gas discharge valve capable of discharging internal gas, an exterior body housing the power storage element in a posture in which the gas discharge valve faces a first direction, an exhaust duct for guiding the gas exhausted from the gas exhaust valve to the outside of the exterior body, and when viewed from the first direction, the power storage element extends in a second direction orthogonal to the first direction. The exhaust duct has an elongated shape, and has a duct body extending in the second direction and a connection portion projecting from the duct body toward the gas discharge valve, and an opening of the connection portion. is disposed in a posture covering the gas discharge valve.
　本発明によれば、薄型化が可能な蓄電装置を提供することができる。 According to the present invention, it is possible to provide a power storage device that can be made thinner.
図１は、実施の形態に係る蓄電装置の外観を示す斜視図である。FIG. 1 is a perspective view showing the appearance of a power storage device according to an embodiment. 図２は、実施の形態に係る蓄電装置における蓄電ユニットの内部構成を示す分解斜視図である。FIG. 2 is an exploded perspective view showing the internal configuration of the power storage unit in the power storage device according to the embodiment. 図３は、実施の形態に係る蓄電ユニットが有する構成要素を示す分解斜視図である。FIG. 3 is an exploded perspective view showing components of the power storage unit according to the embodiment. 図４は、実施の形態に係る排気ダクトの外観を示す外観斜視図である。FIG. 4 is an external perspective view showing the external appearance of the exhaust duct according to the embodiment. 図５は、実施の形態に係る排気ダクトとバスバーフレームとが組み合わされた状態を示す斜視図である。FIG. 5 is a perspective view showing a state in which the exhaust duct and busbar frame according to the embodiment are combined. 図６は、実施の形態に係る蓄電ユニットの分解斜視図である。FIG. 6 is an exploded perspective view of the power storage unit according to the embodiment. 図７は、実施の形態に係る蓄電ユニットの第１の断面図である。FIG. 7 is a first cross-sectional view of the power storage unit according to the embodiment. 図８は、実施の形態に係る蓄電ユニットの第２の断面図である。FIG. 8 is a second cross-sectional view of the power storage unit according to the embodiment. 図９は、実施の形態の変形例に係る蓄電装置の構成概要を示す平面図である。FIG. 9 is a plan view showing a schematic configuration of a power storage device according to a modification of the embodiment.
　本発明の一態様に係る蓄電装置は、内部のガスを排出可能なガス排出弁を備える蓄電素子と、前記蓄電素子を、前記ガス排出弁が第一方向を向く姿勢で収容する外装体と、前記ガス排出弁から排出されたガスを前記外装体の外部に導くための排気ダクトとを備え、前記蓄電素子は、前記第一方向から見た場合、前記第一方向に直交する第二方向に長尺状の形状を有し、前記排気ダクトは、前記第二方向に延びるダクト本体と、前記ダクト本体から、前記ガス排出弁に向けて突出する接続部とを有し、前記接続部の開口部が前記ガス排出弁を覆う姿勢で配置されている。 A power storage device according to an aspect of the present invention includes a power storage element including a gas discharge valve capable of discharging internal gas, an exterior body housing the power storage element in a posture in which the gas discharge valve faces a first direction, an exhaust duct for guiding the gas exhausted from the gas exhaust valve to the outside of the exterior body, and when viewed from the first direction, the power storage element extends in a second direction orthogonal to the first direction. The exhaust duct has an elongated shape, and has a duct body extending in the second direction and a connection portion projecting from the duct body toward the gas discharge valve, and an opening of the connection portion. is disposed in a posture covering the gas discharge valve.
　この構成によれば、排気ダクトのダクト本体は、ガス排出弁側から見た場合（側面視）における蓄電素子の長手方向に沿って設けられ、かつ、ダクト本体から突出する接続部が、ガス排出弁を覆う姿勢で配置される。従って、ガス排出弁から排出されたガスは効率よくダクト本体に導かれる。さらに、排気ダクトの出口（ダクト端部）を、その長手方向の側方に配置できるため、当該長手方向に直交する短手方向における蓄電装置のサイズを大きくせずに、ダクト端部よりも下流に位置する排気管等を配置することができる。従って、蓄電素子の長手方向を水平な姿勢にすることで、背の低い（高さ方向に薄型の）蓄電装置を構成することができる。このように、本態様に係る蓄電装置によれば薄型化が可能である。 According to this configuration, the duct body of the exhaust duct is provided along the longitudinal direction of the storage element when viewed from the side of the gas discharge valve (side view), and the connecting portion protruding from the duct body serves to discharge the gas. It is placed in a posture that covers the valve. Therefore, the gas discharged from the gas discharge valve is efficiently guided to the duct body. Furthermore, since the outlet (duct end) of the exhaust duct can be arranged on the side in the longitudinal direction, the power storage device can be placed downstream from the duct end without increasing the size of the power storage device in the lateral direction orthogonal to the longitudinal direction. An exhaust pipe or the like can be arranged. Therefore, by making the longitudinal direction of the storage element horizontal, it is possible to configure a low-profile (thin in the height direction) power storage device. Thus, the power storage device according to this aspect can be made thinner.
　前記蓄電装置はさらに、前記蓄電素子のガス排出弁が設けられた面に配置された電極端子に接続されるバスバーと、前記バスバーを保持するバスバーフレームとを備え、前記排気ダクトは、前記接続部が前記バスバーフレームの排気用開口部を貫通し、前記接続部の開口部が前記ガス排出弁を覆う姿勢で配置されている、としてもよい。 The power storage device further includes a bus bar connected to the electrode terminal arranged on the surface of the power storage element provided with the gas discharge valve, and a bus bar frame holding the bus bar, and the exhaust duct is connected to the connecting portion. passes through the exhaust opening of the busbar frame, and the opening of the connecting portion is arranged in a posture that covers the gas exhaust valve.
　この構成によれば、バスバーフレームの排気用開口部が、接続部の位置規制をすることができるため、接続部をガス排出弁に対してより精度よく配置することができる。 According to this configuration, the exhaust opening of the busbar frame can regulate the position of the connecting portion, so that the connecting portion can be arranged with respect to the gas exhaust valve with higher accuracy.
　前記バスバーフレームは、前記排気用開口部の周囲に設けられた壁部を備え、前記壁部は、前記第一方向及び前記第二方向に直交する第三方向の両端部のうちの少なくとも一方の端部に、切欠部を有する、としてもよい。 The busbar frame includes a wall portion provided around the exhaust opening, and the wall portion extends along at least one of both ends in a third direction orthogonal to the first direction and the second direction. The end may have a notch.
　この構成によれば、壁部により、接続部がより確実に位置規制される。さらに、壁部の第三方向の端部に切欠部が設けられるため、接続部の先端部を、第三方向から排気用開口部の内方に移動させた後に、接続部をガス排出弁に近づく方向に移動させることで、排気ダクトを配置することができる。従って、蓄電装置において、ガス排出弁付近のスペースが狭い場合であっても、排気ダクトの配置が可能となる。これにより、蓄電装置における奥行方向（第一方向）の幅の増加が抑制される。 According to this configuration, the position of the connecting portion is more reliably regulated by the wall portion. Furthermore, since the notch is provided at the end of the wall in the third direction, after the tip of the connection is moved inward from the exhaust opening from the third direction, the connection is connected to the gas exhaust valve. The exhaust duct can be arranged by moving in the direction of approaching. Therefore, in the power storage device, even if the space near the gas exhaust valve is narrow, the exhaust duct can be arranged. This suppresses an increase in width in the depth direction (first direction) of the power storage device.
　前記蓄電素子は、前記第一方向及び前記第二方向に直交する第三方向に複数並べられており、前記接続部は、複数の前記蓄電素子のうち２つ以上の蓄電素子の前記ガス排出弁を一括して覆う形状に形成されている、としてもよい。 A plurality of the power storage elements are arranged in a third direction orthogonal to the first direction and the second direction, and the connecting portion is connected to the gas discharge valves of two or more of the plurality of power storage elements. may be formed in a shape that covers all of them together.
　この構成によれば、第三方向に並ぶ複数の蓄電素子のうち２つ以上の蓄電素子のガス排出弁から排出されたガスをダクト本体に導く流路を１つの接続部で形成することができる。そのため、簡易な構造の排気ダクトで２つ以上の蓄電素子からのガスを外装体の外部に排出することができる。 According to this configuration, it is possible to form a flow path for guiding gas discharged from the gas discharge valves of two or more storage elements among the plurality of storage elements arranged in the third direction to the duct main body with one connecting portion. . Therefore, gas from two or more power storage elements can be discharged to the outside of the exterior body with an exhaust duct having a simple structure.
　前記蓄電装置はさらに、前記蓄電素子を前記外装体に取り付ける取付部材を備え、前記排気ダクトは、前記接続部が前記取付部材に取り付けられた状態で配置されている、としてもよい。 The power storage device may further include a mounting member for mounting the power storage element to the exterior body, and the exhaust duct may be arranged with the connecting portion mounted to the mounting member.
　この構成によれば、蓄電素子に取り付けられている部材に、排気ダクトの接続部を取り付けることができるため、ガス排出弁に対してより精度よく接続部を配置することができる。 According to this configuration, the connecting portion of the exhaust duct can be attached to the member attached to the power storage element, so the connecting portion can be arranged more accurately with respect to the gas exhaust valve.
　前記接続部は、前記外装体の壁部を貫通して配置されており、前記ダクト本体は、前記外装体の外部に配置されている、としてもよい。 The connecting portion may be arranged through a wall portion of the exterior body, and the duct body may be arranged outside the exterior body.
　この構成によれば、ガス排出弁から排出されたガスは、接続部を介して速やかに外装体の外部のダクト本体に導かれる。従って、ガスの熱が蓄電素子に伝わり難くなる。 According to this configuration, the gas discharged from the gas discharge valve is quickly guided to the duct main body outside the exterior body via the connecting portion. Therefore, it becomes difficult for the heat of the gas to be conducted to the electric storage element.
　以下、図面を参照しながら、本発明の実施の形態（その変形例も含む）に係る蓄電装置について説明する。以下で説明する実施の形態は、いずれも包括的または具体的な例を示すものである。以下の実施の形態で示される数値、形状、材料、構成要素、構成要素の配置位置及び接続形態、製造工程、製造工程の順序などは、一例であり、本発明を限定する主旨ではない。各図において、寸法等は厳密に図示したものではない。各図において、同一または同様な構成要素については同じ符号を付している。 Power storage devices according to embodiments of the present invention (including modifications thereof) will be described below with reference to the drawings. All of the embodiments described below are generic or specific examples. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, manufacturing processes, order of manufacturing processes, and the like shown in the following embodiments are examples, and are not intended to limit the present invention. In each drawing, dimensions and the like are not strictly illustrated. In each figure, the same reference numerals are given to the same or similar components.
　以下の説明及び図面中において、蓄電装置の外装体の長手方向、蓄電ユニットと制御ユニットとの並び方向、蓄電素子の容器の短側面の対向方向、または、１つの蓄電素子における一対の電極端子の並び方向をＸ軸方向と定義する。蓄電素子とバスバーとの並び方向、または、蓄電素子の容器の本体と蓋との並び方向をＹ軸方向と定義する。外装体の本体と蓋との並び方向、蓄電素子の容器の長側面の対向方向、または、上下方向をＺ軸方向と定義する。これらＸ軸方向、Ｙ軸方向及びＺ軸方向は、互いに交差（本実施の形態では直交）する方向である。使用態様によってはＺ軸方向が上下方向にならない場合も考えられるが、以下では説明の便宜のため、Ｚ軸方向を上下方向として説明する。 In the following description and drawings, the longitudinal direction of the exterior body of the power storage device, the alignment direction of the power storage unit and the control unit, the opposite direction of the short side of the container of the power storage element, or the direction of the pair of electrode terminals in one power storage element. The alignment direction is defined as the X-axis direction. The direction in which the electric storage elements and the busbars are arranged, or the direction in which the main body and lid of the container for the electric storage elements are arranged is defined as the Y-axis direction. The Z-axis direction is defined as the direction in which the main body of the exterior body and the lid are aligned, the direction in which the long side faces of the container of the electric storage element face each other, or the up-and-down direction. These X-axis direction, Y-axis direction, and Z-axis direction are directions that cross each other (perpendicularly in this embodiment). Depending on the mode of use, the Z-axis direction may not be the vertical direction, but for convenience of explanation, the Z-axis direction will be described below as the vertical direction.
　以下の説明において、例えば、Ｘ軸プラス方向とは、Ｘ軸の矢印方向を示し、Ｘ軸マイナス方向とは、Ｘ軸プラス方向とは反対方向を示す。Ｙ軸方向及びＺ軸方向についても同様である。以下では、Ｙ軸プラス方向を第一方向とも呼び、Ｘ軸方向を第二方向とも呼び、Ｚ軸方向を第三方向とも呼ぶ場合がある。平行及び直交などの、相対的な方向または姿勢を示す表現は、厳密には、その方向または姿勢ではない場合も含む。例えば、２つの方向が直交している、とは、当該２つの方向が完全に直交していることを意味するだけでなく、実質的に直交していること、すなわち、例えば数％程度の差異を含むことも意味する。 In the following description, for example, the X-axis plus direction indicates the arrow direction of the X-axis, and the X-axis minus direction indicates the direction opposite to the X-axis plus direction. The same applies to the Y-axis direction and the Z-axis direction. Hereinafter, the positive Y-axis direction may also be referred to as the first direction, the X-axis direction may also be referred to as the second direction, and the Z-axis direction may also be referred to as the third direction. Expressions indicating relative directions or orientations, such as parallel and orthogonal, also include cases where the directions or orientations are not strictly speaking. For example, two directions are orthogonal, not only means that the two directions are completely orthogonal, but also substantially orthogonal, that is, for example, a difference of about several percent It is also meant to include
　（実施の形態）
　［１．蓄電装置の全般的な説明］
　まず、本実施の形態における蓄電装置１の概略構成について説明する。図１は、実施の形態に係る蓄電装置１の外観を示す斜視図である。図２は、実施の形態に係る蓄電装置１における蓄電ユニット１０の内部構成を示す分解斜視図である。図３は、実施の形態に係る蓄電ユニット１０が有する構成要素を示す分解斜視図である。図３では、外装体１００が有する第二外装体１２０の図示を省略し、かつ、外装体１００に収容された各構成要素を分離して図示している。 (Embodiment)
[1. General description of power storage device]
First, a schematic configuration of a power storage device 1 according to the present embodiment will be described. FIG. 1 is a perspective view showing the appearance of a power storage device 1 according to an embodiment. FIG. 2 is an exploded perspective view showing the internal configuration of the power storage unit 10 in the power storage device 1 according to the embodiment. FIG. 3 is an exploded perspective view showing components of the power storage unit 10 according to the embodiment. In FIG. 3 , illustration of the second exterior body 120 included in the exterior body 100 is omitted, and each component housed in the exterior body 100 is illustrated separately.
　蓄電装置１は、外部からの電気を充電し、また外部へ電気を放電することができる装置であり、本実施の形態では、略直方体形状を有している。蓄電装置１は、例えば、電力貯蔵用途または電源用途等に使用される電池モジュール（組電池）である。具体的には、蓄電装置１は、例えば、自動車、自動二輪車、ウォータークラフト、船舶、スノーモービル、農業機械、建設機械、または、電気鉄道用の鉄道車両等の移動体の駆動用またはエンジン始動用等のバッテリ等として用いられる。上記の自動車としては、電気自動車（ＥＶ）、ハイブリッド電気自動車（ＨＥＶ）、プラグインハイブリッド電気自動車（ＰＨＥＶ）及びガソリン自動車が例示される。上記の電気鉄道用の鉄道車両としては、電車、モノレール、リニアモーターカー、並びに、ディーゼル機関及び電気モーターの両方を備えるハイブリッド電車が例示される。蓄電装置１は、家庭用または発電機用等に使用される定置用のバッテリ等としても用いることができる。 The power storage device 1 is a device that can charge electricity from the outside and discharge electricity to the outside, and has a substantially rectangular parallelepiped shape in the present embodiment. The power storage device 1 is, for example, a battery module (assembled battery) used for power storage or power supply. Specifically, the power storage device 1 is, for example, an automobile, a motorcycle, a watercraft, a ship, a snowmobile, an agricultural machine, a construction machine, or a rolling stock for an electric railway. It is used as a battery etc. Examples of such vehicles include electric vehicles (EV), hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), and gasoline vehicles. Examples of railway vehicles for the electric railway include electric trains, monorails, linear motor cars, and hybrid trains having both diesel engines and electric motors. The power storage device 1 can also be used as a stationary battery or the like for home use or for a power generator.
　図１～図３に示すように、蓄電装置１は、蓄電ユニット１０と、制御ユニット２０とを備えている。以下では、蓄電装置１のうちの蓄電素子４００を有する部分を蓄電ユニット１０と称し、蓄電素子４００を制御する制御機器を有する部分を制御ユニット２０と称する。蓄電ユニット１０は、外装体１００と、外装体１００に収容された、蓄電素子４００、スペーサ５１０及び５２０、取付部材６１０、エンドプレート６２０、バスバーフレーム７００、バスバー８００、排気ダクト２００、並びに、制御ユニット２０等とを有している。外装体１００は、一対（正極側及び負極側）の外部端子２１及び２２と、コネクタ２３とを有している。まず、蓄電ユニット１０が有する各構成要素について、以下に説明する。 As shown in FIGS. 1 to 3, the power storage device 1 includes a power storage unit 10 and a control unit 20. As shown in FIGS. Hereinafter, the portion of the power storage device 1 that has the power storage element 400 is referred to as power storage unit 10 , and the portion that includes a control device for controlling power storage element 400 is referred to as control unit 20 . The energy storage unit 10 includes an exterior body 100, an energy storage element 400 housed in the exterior body 100, spacers 510 and 520, a mounting member 610, an end plate 620, a busbar frame 700, a busbar 800, an exhaust duct 200, and a control unit. 20 and so on. The exterior body 100 has a pair of (positive electrode side and negative electrode side) external terminals 21 and 22 and a connector 23 . First, each component of the power storage unit 10 will be described below.
　外装体１００は、蓄電装置１の筐体を構成する箱形（略直方体形状）の容器（モジュールケース）である。外装体１００は、蓄電素子４００等の外方に配置され、これら蓄電素子４００等を所定の位置で固定し、衝撃等から保護する。外装体１００は、第一外装体１１０と第二外装体１２０とを有している。 The exterior body 100 is a box-shaped (substantially rectangular parallelepiped) container (module case) that constitutes the housing of the power storage device 1 . The exterior body 100 is arranged outside the power storage elements 400 and the like, fixes the power storage elements 400 and the like at predetermined positions, and protects them from impacts and the like. The exterior body 100 has a first exterior body 110 and a second exterior body 120 .
　第一外装体１１０は、外装体１００の本体を構成する扁平な矩形状の部材であり、蓄電素子４００等が固定される部材である。第二外装体１２０は、外装体１００の蓋体を構成する有底矩形筒状の部材であり、第一外装体１１０のＺ軸プラス方向に配置され、かつ、第一外装体１１０と接続されて蓄電素子４００等を覆う。第二外装体１２０には、Ｚ軸マイナス方向側に開口が形成されており、第一外装体１１０は、第二外装体１２０の当該開口を塞ぐように配置される。 The first exterior body 110 is a flat rectangular member that constitutes the main body of the exterior body 100, and is a member to which the power storage element 400 and the like are fixed. The second exterior body 120 is a bottomed rectangular cylindrical member that constitutes the lid of the exterior body 100, is arranged in the positive Z-axis direction of the first exterior body 110, and is connected to the first exterior body 110. cover the power storage element 400 and the like. An opening is formed in the second exterior body 120 in the negative direction of the Z axis, and the first exterior body 110 is arranged so as to block the opening of the second exterior body 120 .
　具体的には、複数の蓄電素子４００及び排気ダクト２００等が固定された第一外装体１１０の周縁部と、第二外装体１２０の周縁部とが、これらの間にガスケット（図示せず）が介在した状態で、複数組のボルト及びナットによって締結される。これにより、第一外装体１１０と第二外装体１２０との接合部分における気密性が確保される。第一外装体１１０と第二外装体１２０とを接続（接合）する手法は、他の手法でもよく、接着、かしめ接合、溶接、ヒートシール、超音波溶着等であってもよい。 Specifically, a gasket (not shown) is provided between the peripheral edge of the first exterior body 110 to which the plurality of power storage elements 400 and the exhaust duct 200 are fixed and the peripheral edge of the second exterior body 120. are interposed and fastened by a plurality of sets of bolts and nuts. As a result, airtightness is ensured at the joint portion between the first exterior body 110 and the second exterior body 120 . The method of connecting (joining) the first exterior body 110 and the second exterior body 120 may be another method such as adhesion, caulking, welding, heat sealing, ultrasonic welding, or the like.
　第一外装体１１０は、例えば、ステンレス鋼、アルミニウム、アルミニウム合金、鉄、メッキ鋼板等の金属部材、または、絶縁塗装等の絶縁処理が施された金属部材で形成されている。第二外装体１２０は、例えば、ポリカーボネート（ＰＣ）、ポリプロピレン（ＰＰ）、ポリエチレン（ＰＥ）、ポリスチレン（ＰＳ）、ポリフェニレンサルファイド樹脂（ＰＰＳ）、ポリフェニレンエーテル（ＰＰＥ（変性ＰＰＥを含む））、ポリエチレンテレフタラート（ＰＥＴ）、ポリブチレンテレフタレート（ＰＢＴ）、ポリエーテルエーテルケトン（ＰＥＥＫ）、テトラフルオロエチレン・パーフルオロアルキルビニルエーテル（ＰＦＡ）、ポリテトラフルオロエチレン（ＰＴＦＥ）、ポリエーテルサルフォン（ＰＥＳ）、ＡＢＳ樹脂、若しくは、それらの複合材料等の樹脂部材（絶縁部材）で形成されている。第一外装体１１０は、第二外装体１２０と同様の樹脂部材で形成されていてもよいが、剛性の高い部材で形成されているのが好ましい。第一外装体１１０の裏面側（Ｚ軸マイナス方向側）に、第一外装体１１０を補強する補強部材が配置されてもよい。第二外装体１２０は、第一外装体１１０と同様の金属部材で形成されていてもよい。 The first exterior body 110 is made of, for example, a metal member such as stainless steel, aluminum, an aluminum alloy, iron, or a plated steel plate, or a metal member subjected to insulation treatment such as insulating coating. The second exterior body 120 is made of, for example, polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE)), polyethylene terephthalate Talat (PET), polybutylene terephthalate (PBT), polyether ether ketone (PEEK), tetrafluoroethylene/perfluoroalkyl vinyl ether (PFA), polytetrafluoroethylene (PTFE), polyether sulfone (PES), ABS resin Alternatively, it is formed of a resin member (insulating member) such as a composite material thereof. The first exterior body 110 may be made of the same resin member as the second exterior body 120, but is preferably made of a highly rigid member. A reinforcing member that reinforces the first exterior body 110 may be arranged on the back surface side (Z-axis negative direction side) of the first exterior body 110 . The second exterior body 120 may be made of the same metal member as the first exterior body 110 .
　蓄電素子４００は、電気を充電し、また、電気を放電することのできる二次電池（単電池）である。本実施の形態では、蓄電素子４００は、リチウムイオン二次電池等の非水電解質二次電池である。蓄電素子４００は、扁平な直方体形状（角形）を有しており、一対の長側面４１０と一対の短側面４１１とからなる４つの側面を有している（図３参照）。本実施の形態では、２つの蓄電素子４００が横置き（横倒し）にされた状態で（蓄電素子４００の長側面４１０がＺ軸方向に向いた状態で）、Ｚ軸方向及びＸ軸方向に配列されている。具体的には、Ｚ軸方向に積層（平積み）された２つの蓄電素子４００を１つの蓄電素子４００群とした場合、４つの蓄電素子４００群がＸ軸方向に並んで配列されている。複数の蓄電素子４００のそれぞれは、内圧が過度に上昇した場合に内部のガスを外部に排出するためのガス排出弁４１３を有している。蓄電ユニット１０において、複数の蓄電素子４００のそれぞれは、ガス排出弁４１３を、Ｙ軸マイナス方向に向けた姿勢で配置されている。Ｙ軸マイナス方向は第一方向の一例である。 The power storage element 400 is a secondary battery (single battery) capable of charging and discharging electricity. In the present embodiment, power storage element 400 is a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. The power storage element 400 has a flat rectangular parallelepiped shape (square shape), and has four side surfaces including a pair of long side surfaces 410 and a pair of short side surfaces 411 (see FIG. 3). In the present embodiment, two power storage elements 400 are arranged in the Z-axis direction and the X-axis direction with the two power storage elements 400 placed horizontally (with the long side surfaces 410 of the power storage elements 400 facing the Z-axis direction). It is Specifically, when two energy storage elements 400 stacked (flat stacked) in the Z-axis direction constitute one energy storage element 400 group, four energy storage element 400 groups are arranged side by side in the X-axis direction. Each of the plurality of power storage elements 400 has a gas discharge valve 413 for discharging internal gas to the outside when the internal pressure rises excessively. In the power storage unit 10, each of the plurality of power storage elements 400 is arranged with the gas exhaust valve 413 directed in the negative Y-axis direction. The Y-axis minus direction is an example of the first direction.
　蓄電素子４００の形状は、上記角形には限定されず、それ以外の多角柱形状、楕円柱形状、長円柱形状等であってもよい。いずれの場合であっても、Ｙ軸マイナス方向から見た場合に、Ｘ軸方向に長尺な形状を有していればよい。Ｘ軸方向は第二方向の一例である。蓄電素子４００は、非水電解質二次電池には限定されず、非水電解質二次電池以外の二次電池であってもよいし、キャパシタであってもよい。蓄電素子４００は、二次電池ではなく、使用者が充電をしなくても蓄えられている電気を使用できる一次電池であってもよい。蓄電素子４００は、パウチタイプの蓄電素子であってもよい。 The shape of the power storage element 400 is not limited to the rectangular shape described above, and may be other shapes such as a polygonal columnar shape, an elliptical columnar shape, and an oval columnar shape. In either case, it suffices if the shape is elongated in the X-axis direction when viewed from the Y-axis minus direction. The X-axis direction is an example of the second direction. The storage element 400 is not limited to a non-aqueous electrolyte secondary battery, and may be a secondary battery other than a non-aqueous electrolyte secondary battery, or may be a capacitor. The power storage element 400 may be a primary battery that can use stored electricity without being charged by the user, instead of a secondary battery. The storage element 400 may be a pouch-type storage element.
　本実施の形態において、Ｚ軸方向に平積みされた２つの蓄電素子４００は、１つの取付部材６１０によって第一外装体１１０に取り付けられる。具体的には、図３に示すように、第一外装体１１０に近い側から、スペーサ５２０、蓄電素子４００、スペーサ５１０、蓄電素子４００、スペーサ５２０、及びエンドプレート６２０がこの順に積層される。これらのＺ軸方向に積層された要素が、一括して取付部材６１０によって第一外装体１１０に取り付けられる。具体的には、取付部材６１０のＹ軸方向の両端には、取付孔が設けられており、第一外装体１１０に固定されたボルト１１５が取付孔を貫通した状態で、図示しないナットに締結される。これにより、Ｚ軸方向に平積みされた２つの蓄電素子４００（１つの蓄電素子４００群）はＺ軸方向の拘束力を受けた状態で、第一外装体１１０に固定される。取付部材６１０は、第一外装体１１０と連結されることで、蓄電素子４００を、蓄電素子４００の膨らみやすい部分である一対の長側面４１０の対向方向に拘束する拘束部材としても機能する。このような態様で第一外装体１１０に取り付けられる蓄電素子４００群が、第一外装体１１０上においてＸ軸方向に４つ並べられる。取付部材６１０と第一外装体１１０との接続の手法はボルト及びナットによる締結には限定されず、リベットによる締結、溶接、圧入、またはカシメなど、各種の手法を採用し得る。 In the present embodiment, two power storage elements 400 stacked in the Z-axis direction are attached to the first exterior body 110 by one attachment member 610 . Specifically, as shown in FIG. 3 , spacer 520 , power storage element 400 , spacer 510 , power storage element 400 , spacer 520 , and end plate 620 are stacked in this order from the side closer to first exterior body 110 . These elements stacked in the Z-axis direction are collectively attached to the first exterior body 110 by the attachment member 610 . Specifically, mounting holes are provided at both ends of the mounting member 610 in the Y-axis direction, and bolts 115 fixed to the first exterior body 110 pass through the mounting holes and are fastened to nuts (not shown). be done. As a result, the two power storage elements 400 (one power storage element 400 group) stacked in the Z-axis direction are fixed to the first exterior body 110 while receiving a binding force in the Z-axis direction. Attachment member 610 is connected to first exterior body 110 and also functions as a restraining member that restrains power storage element 400 in the facing direction of a pair of long side surfaces 410 , which are portions of power storage element 400 that tend to swell. Four groups of power storage elements 400 attached to the first exterior body 110 in this manner are arranged in the X-axis direction on the first exterior body 110 . The method of connecting the mounting member 610 and the first exterior body 110 is not limited to fastening with bolts and nuts, and various methods such as fastening with rivets, welding, press-fitting, or caulking can be employed.
　取付部材６１０及びエンドプレート６２０は、例えば第一外装体１１０と同じく、金属部材、または、絶縁塗装等の絶縁処理が施された金属部材で形成されている。スペーサ５１０及び５２０は、例えば第二外装体１２０と同じく、ＰＣ、ＰＰ、若しくはＰＥ等の樹脂材料、またはダンマ材等の高耐熱性材料で形成されている。取付部材６１０、エンドプレート６２０、スペーサ５１０及び５２０を形成する材料は上記例示には限定されず、これら全ての部材が金属または樹脂等で形成されていてもよい。 The mounting member 610 and the end plate 620 are formed of a metal member or a metal member subjected to insulation treatment such as insulating coating, for example, like the first exterior body 110 . The spacers 510 and 520 are made of, for example, a resin material such as PC, PP, or PE, or a highly heat-resistant material such as a damper material, like the second exterior body 120 . Materials forming the mounting member 610, the end plate 620, and the spacers 510 and 520 are not limited to the above examples, and all these members may be formed of metal, resin, or the like.
　バスバー８００は、蓄電素子４００に接続される板状の導電部材である。具体的には、バスバー８００は、複数の蓄電素子４００のＹ軸マイナス方向に配置され、複数の蓄電素子４００の電極端子４２０に接合される。本実施の形態では、バスバー８００と蓄電素子４００の電極端子４２０とは、溶接によって接続（接合）されるが、ボルト締結等によって接続（接合）されてもよい。バスバー８００は、例えば、アルミニウム、アルミニウム合金、銅、銅合金、ニッケル等の金属製の導電部材若しくはそれらの組み合わせ、または、金属以外の導電性の部材で形成されている。本実施の形態では、複数のバスバー８００により、Ｚ軸方向に並ぶ２つの蓄電素子４００（１つの蓄電素子４００群）が並列に接続され、かつ４つの蓄電素子４００群が直列に接続されている。これら８個の蓄電素子４００の電気的な接続形態はこれに限定されず、全ての蓄電素子４００が直列に接続されてもよいし、その他の接続形態であってもよい。 The bus bar 800 is a plate-shaped conductive member connected to the power storage element 400 . Specifically, bus bar 800 is arranged in the Y-axis negative direction of multiple power storage elements 400 and is joined to electrode terminals 420 of multiple power storage elements 400 . In the present embodiment, bus bar 800 and electrode terminal 420 of power storage element 400 are connected (joined) by welding, but may be connected (joined) by bolting or the like. The bus bar 800 is made of, for example, a conductive member made of metal such as aluminum, aluminum alloy, copper, copper alloy, nickel, or a combination thereof, or a conductive member other than metal. In the present embodiment, two power storage elements 400 (one power storage element 400 group) aligned in the Z-axis direction are connected in parallel by a plurality of bus bars 800, and four power storage element 400 groups are connected in series. . The electrical connection form of these eight power storage elements 400 is not limited to this, and all power storage elements 400 may be connected in series, or may be connected in another form.
　バスバーフレーム７００は、バスバー８００を保持する部材である。バスバーフレーム７００は、バスバー８００の位置規制を行うことができる。本実施の形態では、バスバーフレーム７００は絶縁部材であり、バスバー８００と他の部材とを電気的に絶縁する。バスバーフレーム７００は、例えば、上記の第二外装体１２０に使用可能ないずれかの電気的絶縁性の樹脂材料等で形成されている。バスバーフレーム７００は、複数の蓄電素子４００のＹ軸マイナス方向側に配置され、複数の蓄電素子４００に対して位置決めされる。バスバーフレーム７００には、複数のバスバー８００及び図示しない電線等が位置決めされる。これにより、バスバー８００が、複数の蓄電素子４００に対して位置決めされて、当該複数の蓄電素子４００が有する電極端子４２０に接合される。本実施の形態では、バスバーフレーム７００はさらに、排気ダクト２００の位置を規制する機能を有し、かつ、取付部材６１０にバスバーフレーム７００を取り付けるための部位を有している。これらの特徴については、図４～図８を用いて後述する。 The busbar frame 700 is a member that holds the busbar 800 . The busbar frame 700 can regulate the position of the busbar 800 . In this embodiment, busbar frame 700 is an insulating member that electrically insulates busbar 800 from other members. The busbar frame 700 is made of, for example, any electrically insulating resin material or the like that can be used for the second exterior body 120 described above. The busbar frame 700 is arranged on the Y-axis negative direction side of the plurality of power storage elements 400 and is positioned with respect to the plurality of power storage elements 400 . A plurality of busbars 800 and electric wires (not shown) are positioned on the busbar frame 700 . As a result, bus bar 800 is positioned with respect to the plurality of power storage elements 400 and joined to electrode terminals 420 of the plurality of power storage elements 400 . In the present embodiment, busbar frame 700 further has a function of regulating the position of exhaust duct 200 and has a portion for attaching busbar frame 700 to attachment member 610 . These features will be described later with reference to FIGS. 4 to 8. FIG.
　排気ダクト２００は、蓄電素子４００のガス排出弁４１３が開放された場合（開弁した場合）に、ガス排出弁４１３から排出されるガスを外装体１００の外部に導くための部材である。排気ダクト２００は、ガスの流路を形成するダクト本体２０１を有する。排気ダクト２００は、第一外装体１１０に固定され、かつ、排気ダクト２００の一部を貫通したボルトにナット１３０が締め付けられることで、第一外装体１１０に固定される（図２参照）。排気ダクト２００は、例えば、主としてＰＣ、ＰＰ、またはＰＥ等の樹脂材料で形成された、Ｘ軸方向に長尺状の管状部材であり、蓄電素子４００側（Ｙ軸プラス方向側）に、ガスの入り口である開口部が複数設けられている。本実施の形態では、排気ダクト２００におけるガスの出口であるダクト端部２０５は、第二外装体１２０に設けられた通気室１５０（図２参照）に接続される。排気ダクト２００は、少なくとも一部が、耐熱性の高い金属等の樹脂以外の材料で形成されていてもよい。 The exhaust duct 200 is a member for guiding the gas exhausted from the gas exhaust valve 413 to the outside of the exterior body 100 when the gas exhaust valve 413 of the storage element 400 is opened (opened). The exhaust duct 200 has a duct body 201 that forms a gas flow path. The exhaust duct 200 is fixed to the first exterior body 110, and is fixed to the first exterior body 110 by tightening a nut 130 on a bolt that partially penetrates the exhaust duct 200 (see FIG. 2). The exhaust duct 200 is, for example, a tubular member elongated in the X-axis direction and made mainly of a resin material such as PC, PP, or PE. A plurality of openings are provided as entrances to the In this embodiment, the duct end portion 205 that is the gas outlet of the exhaust duct 200 is connected to the ventilation chamber 150 (see FIG. 2) provided in the second exterior body 120 . At least a portion of the exhaust duct 200 may be made of a material other than resin, such as a highly heat-resistant metal.
　通気室１５０は、各蓄電素子４００から排出されたガスの外装体１００の外部への放出を可能とし、かつ、水または塵芥などの異物の外装体１００の内部への侵入を抑制する部位である。具体的には、図２に示すように、通気室１５０は、第二外装体１２０の端部に設けられた陥凹状の部分を通気室カバー１２１で覆うことで形成されている。通気室１５０の底面を形成する壁部には、通気室１５０の内部と外装体１００の内部（通気室１５０を除く）とを連通する第一筒状部１５１が設けられている。さらに通気室１５０の、Ｘ軸マイナス方向側の壁部には、通気室１５０の内部と外装体１００の外部とを連通する排気口１５８が設けられている。第一筒状部１５１には、上方から膜支持部材１５３が有する第二筒状部１５２が挿入され、第一筒状部１５１の下方からはダクト端部２０５が挿入される。これにより、ダクト端部２０５と膜支持部材１５３とが第一筒状部１５１を介して連通する状態となる。膜支持部材１５３には膜部材１５７が配置されており、膜部材１５７は、第二筒状部１５２により形成されるガスの流路を塞ぐ姿勢で膜支持部材１５３に支持されている。従って、通常時では、仮に通気室１５０の内部に異物が侵入した場合であっても、膜部材１５７によって外装体１００の内部への異物の侵入は実質的に防止される。蓄電素子４００が開弁することで排気ダクト２００の内圧が過度に上昇した場合、膜部材１５７が破断、変形、または変位等することで、排気ダクト２００の内部のガスは、通気室１５０を介して外装体１００の外部に放出される。具体的には通気室１５０に到達したガスが、排気口１５８と、排気口１５８に連通する排気管１５９とを介して外装体１００の外部に排出される。排気ダクト２００及びその周辺の構成については、図４～図８を用いて後述する。 Ventilation chamber 150 is a portion that allows gas discharged from each storage element 400 to be released to the outside of exterior body 100 and prevents foreign matter such as water or dust from entering interior of exterior body 100 . . Specifically, as shown in FIG. 2 , the ventilation chamber 150 is formed by covering a recessed portion provided at the end of the second exterior body 120 with a ventilation chamber cover 121 . A wall portion forming the bottom surface of the ventilation chamber 150 is provided with a first tubular portion 151 that communicates the inside of the ventilation chamber 150 with the inside of the exterior body 100 (excluding the ventilation chamber 150). Furthermore, an exhaust port 158 that communicates the inside of the ventilation chamber 150 with the outside of the exterior body 100 is provided in the wall portion of the ventilation chamber 150 on the negative side of the X axis. The second tubular portion 152 of the membrane support member 153 is inserted into the first tubular portion 151 from above, and the duct end portion 205 is inserted from below the first tubular portion 151 . As a result, the duct end portion 205 and the membrane support member 153 are brought into communication with each other via the first cylindrical portion 151 . A membrane member 157 is arranged on the membrane support member 153 , and the membrane member 157 is supported by the membrane support member 153 in a posture that closes the gas flow path formed by the second tubular portion 152 . Therefore, even if foreign matter enters the inside of the ventilation chamber 150 in normal times, the film member 157 substantially prevents the foreign matter from entering the inside of the exterior body 100 . When the internal pressure of the exhaust duct 200 excessively increases due to the valve opening of the electricity storage element 400 , the film member 157 is broken, deformed, displaced, or the like, and the gas inside the exhaust duct 200 is released through the ventilation chamber 150 . is released to the outside of the exterior body 100 . Specifically, the gas that has reached ventilation chamber 150 is discharged to the outside of exterior body 100 through exhaust port 158 and exhaust pipe 159 communicating with exhaust port 158 . The configuration of the exhaust duct 200 and its surroundings will be described later with reference to FIGS. 4 to 8. FIG.
　次に、制御ユニット２０の構成概要について説明する。制御ユニット２０は、蓄電素子４００を制御する制御機器を有する装置であり、外装体１００の内部において、蓄電ユニット１０に接続されている。制御ユニット２０には、外装体１００に配置された外部端子２１及び２２が電気的に接続されており、蓄電装置１（蓄電ユニット１０）は、この一対の外部端子２１及び２２を介して、外部からの電気を充電し、また外部へ電気を放電する。外部端子２１及び２２は、例えば、アルミニウム、アルミニウム合金、銅、銅合金等の金属製の導電部材で形成されている。制御ユニット２０にはさらに、外装体１００に配置されたコネクタ２３が電気的に接続されている。コネクタ２３には、例えば、蓄電装置１を制御する上位の制御装置から延設されたケーブルが接続される。制御ユニット２０は、ケーブル及びコネクタ２３を介して受信する制御信号に従って蓄電ユニット１０の充放電を制御する。 Next, an overview of the configuration of the control unit 20 will be described. The control unit 20 is a device having a control device that controls the power storage element 400 and is connected to the power storage unit 10 inside the exterior body 100 . The control unit 20 is electrically connected to external terminals 21 and 22 arranged on the exterior body 100 , and the power storage device 1 (power storage unit 10 ) is connected to the outside through the pair of external terminals 21 and 22 . Charges electricity from and discharges electricity to the outside. The external terminals 21 and 22 are made of a conductive member made of metal such as aluminum, aluminum alloy, copper, copper alloy, or the like. The control unit 20 is also electrically connected to a connector 23 arranged on the exterior body 100 . Connector 23 is connected to, for example, a cable extending from a higher-level control device that controls power storage device 1 . The control unit 20 controls charging and discharging of the power storage unit 10 according to control signals received via the cable and connector 23 .
　［２．排気ダクト及びその周辺の構成］
　次に、本実施の形態に係る排気ダクト２００及びその周辺の構成について、図４～図８を参照しながら説明する。図４は、実施の形態に係る排気ダクト２００の外観を示す外観斜視図である。図５は、実施の形態に係る排気ダクト２００とバスバーフレーム７００とが組み合わされた状態を示す斜視図である。図６は、実施の形態に係る蓄電ユニット１０の分解斜視図である。図６では、バスバーフレーム７００及び排気ダクト２００を、第一外装体１１０に固定された複数の蓄電素子４００から分離した状態が図示されている。図７は、実施の形態に係る蓄電ユニット１０の第１の断面図であり、図８は、実施の形態に係る蓄電ユニット１０の第２の断面図である。具体的には、図７では、図６のＶＩＩ－ＶＩＩ線を通るＹＺ平面における蓄電ユニット１０の一部の断面が図示されており、図８では、図６のＶＩＩＩ－ＶＩＩＩ線を通るＸＹ平面における蓄電ユニット１０の一部の断面が図示されている。 [2. Exhaust duct and its surrounding configuration]
Next, the configuration of exhaust duct 200 and its surroundings according to the present embodiment will be described with reference to FIGS. 4 to 8. FIG. FIG. 4 is an external perspective view showing the external appearance of exhaust duct 200 according to the embodiment. FIG. 5 is a perspective view showing a state in which exhaust duct 200 and busbar frame 700 according to the embodiment are combined. FIG. 6 is an exploded perspective view of power storage unit 10 according to the embodiment. FIG. 6 illustrates a state in which the busbar frame 700 and the exhaust duct 200 are separated from the plurality of power storage elements 400 fixed to the first exterior body 110 . FIG. 7 is a first cross-sectional view of power storage unit 10 according to the embodiment, and FIG. 8 is a second cross-sectional view of power storage unit 10 according to the embodiment. Specifically, FIG. 7 shows a cross section of part of the power storage unit 10 on the YZ plane passing through the VII-VII line in FIG. 6, and FIG. 8 shows the XY plane passing through the VIII-VIII line in FIG. , a partial cross-section of the electricity storage unit 10 is shown.
　図４～図８に示すように、排気ダクト２００は、ダクト本体２０１と接続部２１０とを有している。ダクト本体２０１は、Ｘ軸方向に延びるガスの流路を形成する部材である。接続部２１０は、ダクト本体２０１から、ガス排出弁４１３に向けて突出して設けられている。接続部２１０は、図４及び図５に示すように、突出方向の先端部に開口部２１１を有しており、筒状（管状）である。開口部２１１は、図６及び図７に示すように、蓄電素子４００のガス排出弁４１３を覆う姿勢で配置されている。本実施の形態では、Ｘ軸方向に長尺状のダクト本体２０１に、４つの接続部２１０が等間隔でＸ軸方向に並んで配置されている。４つの接続部２１０のそれぞれは、図６に示すように、Ｚ軸方向に平積みされた２つの蓄電素子４００に対向する位置に配置されており、当該２つの蓄電素子４００のガス排出弁４１３それぞれから排出されたガスを、ダクト本体２０１に案内することができる。 As shown in FIGS. 4 to 8, the exhaust duct 200 has a duct body 201 and a connecting portion 210. As shown in FIGS. The duct body 201 is a member that forms a gas flow path extending in the X-axis direction. The connecting portion 210 is provided so as to protrude from the duct body 201 toward the gas discharge valve 413 . As shown in FIGS. 4 and 5, the connecting portion 210 has an opening 211 at the tip in the projecting direction, and is cylindrical (tubular). As shown in FIGS. 6 and 7 , the opening 211 is arranged in a posture that covers the gas exhaust valve 413 of the storage element 400 . In this embodiment, a duct body 201 elongated in the X-axis direction has four connecting portions 210 arranged side by side in the X-axis direction at equal intervals. As shown in FIG. 6, each of the four connection parts 210 is arranged at a position facing two power storage elements 400 stacked in the Z-axis direction, and the gas discharge valves 413 of the two power storage elements 400 are arranged. The gas discharged from each can be guided to the duct body 201 .
　本実施の形態において、接続部２１０は、ダクト本体２０１と蓄電素子４００との間に配置されたバスバーフレーム７００及び取付部材６１０を貫通して配置されている。具体的には、バスバーフレーム７００は、図５及び図６に示すように、接続部２１０を貫通させる排気用開口部７１０を有しており、排気用開口部７１０の周囲には、図６及び図８に示すように、壁部７１１が設けられている。壁部７１１は、接続部２１０の軸方向（Ｙ軸方向）に沿ってバスバーフレーム７００に立設されている。このように構成されたバスバーフレーム７００には、バスバーフレーム７００を取付部材６１０に取り付けるための取付凸部７０５が設けられている。本実施の形態では、取付凸部７０５は、その先端部が、外径を縮めながら取付部材６１０の係合孔６１５（図６参照）に挿入され、挿入の完了後に弾性力により外径が広がる（復元する）ことで、係合孔６１５に係合する。このように係合孔６１５に係合する取付凸部７０５は、図５に示すように、排気用開口部７１０のＸ軸方向の両側のそれぞれに配置されており、これにより、バスバーフレーム７００の、複数の蓄電素子４００に対する位置決め（位置規制）が精度よくなされる。 In the present embodiment, connecting portion 210 is arranged to penetrate busbar frame 700 and mounting member 610 arranged between duct main body 201 and power storage element 400 . Specifically, as shown in FIGS. 5 and 6, the busbar frame 700 has an exhaust opening 710 through which the connecting portion 210 penetrates. As shown in FIG. 8, a wall portion 711 is provided. Wall portion 711 is erected on busbar frame 700 along the axial direction (Y-axis direction) of connecting portion 210 . The busbar frame 700 configured in this manner is provided with mounting projections 705 for mounting the busbar frame 700 to the mounting member 610 . In the present embodiment, the mounting projection 705 is inserted into the engagement hole 615 (see FIG. 6) of the mounting member 610 while its outer diameter is reduced, and after the insertion is completed, the outer diameter expands due to the elastic force. By (restoring), it engages with the engagement hole 615 . As shown in FIG. 5, the mounting protrusions 705 that engage with the engagement holes 615 are arranged on both sides of the exhaust opening 710 in the X-axis direction. , positioning (positional regulation) with respect to the plurality of power storage elements 400 is performed with high accuracy.
　取付部材６１０は、図６～図８に示すように、ガス排出弁４１３に対向する位置に、接続部２１０を貫通させる排気用開口部６１１を有しており、排気用開口部６１１は、バスバーフレーム７００の排気用開口部７１０とＹ軸方向で並ぶ位置に配置されている。接続部２１０は、バスバーフレーム７００の排気用開口部７１０と取付部材６１０の排気用開口部６１１とを貫通し、かつ、接続部２１０の開口部２１１が、ガス排出弁４１３を覆う位置に配置される。このように構成された取付部材６１０に対し、排気ダクト２００は、取付部材６１０と機械的にかかり合う構造を有している。具体的には、排気ダクト２００の接続部２１０には、図４、図５及び図８に示すように、取付部材６１０の排気用開口部６１１に挿入される部分に係合部２１５を有している。係合部２１５は、接続部２１０の外周面から外側に突出した爪状の部位であり、図７に示すように、接続部２１０の先端部が排気用開口部６１１に挿入された状態で、排気用開口部６１１の周縁に係合するように形成されている。本実施の形態では、４つの接続部２１０のそれぞれが、対応する排気用開口部６１１の周縁と係合する一対の係合部２１５を有している。４つの接続部２１０のそれぞれは、排気用開口部６１１の周縁と係合することで、当該接続部２１０に対応する取付部材６１０に取り付けられる。 As shown in FIGS. 6 to 8, the mounting member 610 has an exhaust opening 611 at a position facing the gas exhaust valve 413, through which the connecting portion 210 passes. It is arranged at a position aligned with the exhaust opening 710 of the frame 700 in the Y-axis direction. Connection portion 210 passes through exhaust opening 710 of busbar frame 700 and exhaust opening 611 of mounting member 610 , and opening 211 of connection portion 210 is disposed at a position covering gas exhaust valve 413 . be. The exhaust duct 200 has a structure that mechanically engages with the mounting member 610 configured as described above. Specifically, as shown in FIGS. 4, 5 and 8, the connecting portion 210 of the exhaust duct 200 has an engaging portion 215 at a portion that is inserted into the exhaust opening 611 of the mounting member 610. ing. The engaging portion 215 is a claw-shaped portion that protrudes outward from the outer peripheral surface of the connecting portion 210. As shown in FIG. It is formed to engage with the periphery of the exhaust opening 611 . In this embodiment, each of the four connecting portions 210 has a pair of engaging portions 215 that engage with the periphery of the corresponding exhaust opening 611 . Each of the four connecting portions 210 is attached to the mounting member 610 corresponding to the connecting portion 210 by engaging with the periphery of the exhaust opening 611 .
　以上説明したように、本実施の形態に係る蓄電装置１は、内部のガスを排出可能なガス排出弁４１３を備える蓄電素子４００と、蓄電素子４００を、ガス排出弁４１３が第一方向（Ｙ軸方向）を向く姿勢で収容する外装体１００と、ガス排出弁４１３から排出されたガスを外装体１００の外部に導くための排気ダクト２００とを備える。蓄電素子４００は、Ｙ軸方向から見た場合、Ｙ軸方向に直交する第二方向（Ｘ軸方向）に長尺状の形状を有する。排気ダクト２００は、Ｘ軸方向に延びるガスの流路を形成するダクト本体２０１と、ダクト本体２０１から、ガス排出弁４１３に向けて突出する接続部２１０とを有する。接続部２１０の開口部２１１がガス排出弁４１３を覆う姿勢で配置されている。 As described above, power storage device 1 according to the present embodiment includes power storage element 400 having gas discharge valve 413 capable of discharging internal gas, power storage element 400, and gas discharge valve 413 in the first direction (Y and an exhaust duct 200 for guiding the gas discharged from the gas exhaust valve 413 to the outside of the exterior body 100 . When viewed from the Y-axis direction, the power storage element 400 has an elongated shape in a second direction (X-axis direction) orthogonal to the Y-axis direction. The exhaust duct 200 has a duct body 201 forming a gas flow path extending in the X-axis direction, and a connecting portion 210 projecting from the duct body 201 toward the gas discharge valve 413 . The opening 211 of the connecting portion 210 is arranged in a posture that covers the gas exhaust valve 413 .
　この構成によれば、排気ダクト２００のダクト本体２０１は、ガス排出弁４１３側から見た場合（側面視）における蓄電素子４００の長手方向に沿って設けられ、かつ、ダクト本体２０１から突出する接続部２１０が、ガス排出弁４１３を覆う姿勢で配置される。従って、ガス排出弁４１３から排出されたガスは効率よくダクト本体２０１に導かれる。さらに、例えば排気ダクト２００の出口（ダクト端部２０５）を、その長手方向の側方に配置できるため、当該長手方向に直交する短手方向（Ｚ軸方向）における蓄電装置１のサイズを大きくせずに、ダクト端部２０５よりも下流に位置する排気管１５９等を配置することができる。従って、例えば、蓄電素子４００の長手方向を水平な姿勢にすることで、背の低い（高さ方向に薄型の）蓄電装置１を構成することができる。このように、本実施の形態に係る蓄電装置１によれば薄型化が可能である。 According to this configuration, the duct body 201 of the exhaust duct 200 is provided along the longitudinal direction of the storage element 400 when viewed from the side of the gas discharge valve 413 (side view), and the connection protrudes from the duct body 201. A portion 210 is arranged in a posture covering the gas exhaust valve 413 . Therefore, the gas discharged from the gas discharge valve 413 is efficiently guided to the duct main body 201 . Furthermore, for example, the outlet (duct end portion 205) of exhaust duct 200 can be arranged on the side in the longitudinal direction, so that the size of power storage device 1 in the lateral direction (Z-axis direction) perpendicular to the longitudinal direction can be increased. However, the exhaust pipe 159 or the like located downstream of the duct end 205 can be arranged without the duct end 205 . Therefore, for example, by making the longitudinal direction of the storage element 400 horizontal, the storage device 1 can be configured to be short (thin in the height direction). As described above, the power storage device 1 according to the present embodiment can be made thinner.
　本実施の形態において、蓄電装置１はさらに、蓄電素子４００のガス排出弁４１３が設けられた側面に配置された電極端子４２０に接続されるバスバー８００と、バスバー８００を保持するバスバーフレーム７００とを備える。排気ダクト２００は、接続部２１０がバスバーフレーム７００の排気用開口部７１０を貫通し、接続部２１０の開口部２１１がガス排出弁４１３を覆う姿勢で配置されている。 In the present embodiment, power storage device 1 further includes bus bar 800 connected to electrode terminal 420 arranged on the side surface of power storage element 400 on which gas discharge valve 413 is provided, and bus bar frame 700 holding bus bar 800. Prepare. Exhaust duct 200 is arranged such that connecting portion 210 passes through exhaust opening 710 of busbar frame 700 and opening 211 of connecting portion 210 covers gas exhaust valve 413 .
　この構成によれば、バスバーフレーム７００の排気用開口部７１０が、接続部２１０の位置規制をすることができるため、接続部２１０をガス排出弁４１３に対してより精度よく配置することができる。また、このような効果を得る部材は、バスバーフレーム７００であるため、接続部２１０の位置規制用の部材を別途用いる必要がない。このことは、蓄電装置１の薄型化に有利である。 According to this configuration, the exhaust opening 710 of the busbar frame 700 can regulate the position of the connecting portion 210, so that the connecting portion 210 can be arranged with respect to the gas exhaust valve 413 with higher accuracy. Moreover, since the member that obtains such an effect is the busbar frame 700 , there is no need to separately use a member for regulating the position of the connection portion 210 . This is advantageous for thinning the power storage device 1 .
　本実施の形態において、バスバーフレーム７００は、排気用開口部７１０の周囲に設けられた壁部７１１を備える。壁部７１１は、第一方向（Ｙ軸方向）及び第二方向（Ｘ軸方向）に直交する第三方向（Ｚ軸方向）の両端部のうちの少なくとも一方の端部に、切欠部７１２を有する。 In this embodiment, the busbar frame 700 includes a wall portion 711 provided around the exhaust opening 710 . The wall portion 711 has a notch portion 712 on at least one of both ends in a third direction (Z-axis direction) perpendicular to the first direction (Y-axis direction) and the second direction (X-axis direction). have.
　この構成によれば、壁部７１１により、接続部２１０がより確実に位置規制される。さらに、壁部７１１のＺ軸方向の端部に切欠部７１２が設けられるため、接続部２１０の先端部を、Ｚ軸方向の側から排気用開口部７１０の内方に移動させた後に、接続部２１０をガス排出弁４１３に近づく方向に移動させることで、排気ダクト２００を配置することができる。本実施の形態では、図６に示すように、壁部７１１の上端部に切欠部７１２が設けられている。従って、接続部２１０の先端部が切欠部７１２を通過するように、上から下向きに排気ダクト２００を移動させた後に、前方（Ｙ軸プラス方向）に排気ダクト２００を移動させることで、排気ダクト２００を正規の位置に配置することができる。従って、蓄電装置１において、ガス排出弁４１３付近（蓄電素子４００のＺ軸マイナス方向側）のスペースが狭い場合であっても、または、ガス排出弁４１３に対向する位置に何等かの部材が配置されている場合であっても、排気ダクト２００の配置が可能となる。これにより、蓄電装置１における奥行方向（Ｙ軸方向）の幅の増加が抑制される。 According to this configuration, the wall portion 711 more reliably restricts the position of the connection portion 210 . Furthermore, since the notch portion 712 is provided at the end portion of the wall portion 711 in the Z-axis direction, the tip portion of the connection portion 210 is moved inward from the exhaust opening portion 710 from the Z-axis direction side, and then connected. By moving the portion 210 in a direction approaching the gas exhaust valve 413, the exhaust duct 200 can be arranged. In this embodiment, as shown in FIG. 6, a notch portion 712 is provided at the upper end portion of the wall portion 711 . Therefore, after moving the exhaust duct 200 downward from above so that the tip of the connecting portion 210 passes through the cutout portion 712, the exhaust duct 200 is moved forward (Y-axis plus direction). 200 can be placed in the correct position. Therefore, in the power storage device 1, even if the space in the vicinity of the gas discharge valve 413 (on the Z-axis negative direction side of the power storage element 400) is narrow, or if some member is arranged at a position facing the gas discharge valve 413 Even if it is, the arrangement of the exhaust duct 200 is possible. This suppresses an increase in width in the depth direction (Y-axis direction) of power storage device 1 .
　本実施の形態において、蓄電素子４００は、Ｚ軸方向に複数並べられており、接続部２１０は、図７に示すように、複数の蓄電素子４００のうち２つ以上の蓄電素子４００のガス排出弁４１３を一括して覆う形状に形成されている。 In the present embodiment, a plurality of power storage elements 400 are arranged in the Z-axis direction, and as shown in FIG. It is formed in a shape that covers the valve 413 collectively.
　この構成によれば、Ｚ軸方向に並ぶ複数のガス排出弁４１３から排出されたガスをダクト本体２０１に導く流路を、１つの接続部２１０で形成することができる。そのため、簡易な構造の排気ダクト２００で複数の蓄電素子４００からのガスを外装体１００の外部に排出することができる。 According to this configuration, a single connecting portion 210 can form a channel for guiding gas discharged from a plurality of gas discharge valves 413 arranged in the Z-axis direction to the duct main body 201 . Therefore, the gas from the plurality of power storage elements 400 can be discharged to the outside of the exterior body 100 with the exhaust duct 200 having a simple structure.
　本実施の形態において、蓄電装置１はさらに、蓄電素子４００を外装体１００に取り付ける取付部材６１０を備える。排気ダクト２００は、接続部２１０が取付部材６１０に取り付けられた状態で配置されている。 In the present embodiment, power storage device 1 further includes mounting member 610 for mounting power storage element 400 to exterior body 100 . The exhaust duct 200 is arranged with the connection portion 210 attached to the attachment member 610 .
　この構成によれば、蓄電素子４００に取り付けられている部材に、排気ダクト２００の接続部２１０を取り付けることができるため、ガス排出弁４１３に対して精度よく接続部２１０を配置することができる。本実施の形態では、図８に示すように、接続部２１０の先端部が排気用開口部６１１に挿入され、かつ当該先端部に設けられた爪状の係合部２１５が排気用開口部６１１の周縁に係合することで、接続部２１０が取付部材６１０に取り付けられている。従って、振動、衝撃、またはガス排出弁４１３から排出されるガスの圧力によって、接続部２１０の先端部が排気用開口部６１１から抜け出す可能性が低減する。これにより、薄型化が可能な蓄電装置１において、ガス排出弁４１３から排出されたガスをより効率よくまたはより確実に、外装体１００の外部まで導くことができる。 According to this configuration, the connecting portion 210 of the exhaust duct 200 can be attached to the member attached to the power storage element 400 , so the connecting portion 210 can be arranged with high accuracy with respect to the gas exhaust valve 413 . In the present embodiment, as shown in FIG. 8, the tip of the connecting portion 210 is inserted into the exhaust opening 611, and the claw-shaped engaging portion 215 provided at the tip is inserted into the exhaust opening 611. The connecting portion 210 is attached to the attachment member 610 by engaging the peripheral edge of the . Therefore, the possibility that the distal end of the connecting portion 210 will slip out of the exhaust opening 611 due to vibration, impact, or the pressure of the gas exhausted from the gas exhaust valve 413 is reduced. As a result, in power storage device 1 that can be made thinner, the gas discharged from gas discharge valve 413 can be more efficiently or reliably guided to the outside of exterior body 100 .
　以上、本発明の実施の形態に係る蓄電装置１について説明したが、蓄電装置１は、排気ダクト２００及びその周辺の構成について、図４～図８に示す構成とは異なる構成を備えてもよい。排気ダクト２００及びその周辺の構成についての変形例を、上記実施の形態との差分を中心に、図９を用いて説明する。 Although the power storage device 1 according to the embodiment of the present invention has been described above, the power storage device 1 may have a configuration different from the configurations shown in FIGS. . A modified example of the configuration of exhaust duct 200 and its surroundings will be described with reference to FIG. 9, focusing on differences from the above embodiment.
　［３．変形例］
　図９は、実施の形態の変形例に係る蓄電装置１ａの構成概要を示す平面図である。図９では、外装体１００のおおよその外形が点線の矩形で表されるなど、蓄電装置１ａにおける複数の構成要素の位置関係をわかりやすく示すために各構成要素が簡易的に図示されている。 [3. Modification]
FIG. 9 is a plan view showing a schematic configuration of a power storage device 1a according to a modification of the embodiment. In FIG. 9 , each component is simply illustrated to clearly show the positional relationship of the plurality of components in power storage device 1 a , such as the rough outline of exterior body 100 being represented by a dotted rectangle.
　図９に示すように、本変形例に係る蓄電装置１ａは、蓄電ユニット１０ａと制御ユニット２０とを備える。蓄電ユニット１０ａは、蓄電素子４００と、蓄電素子４００を収容する外装体１００と、蓄電素子４００のガス排出弁４１３から排出されたガスを外装体１００の外部に導くための排気ダクト２００ａとを備えている。排気ダクト２００ａは、Ｘ軸方向に延びるガスの流路を形成するダクト本体２０１と、ダクト本体２０１から、ガス排出弁４１３に向けて突出する接続部２１０とを有する。接続部２１０の開口部２１１がガス排出弁４１３を覆う姿勢で配置されている。これらの構成については、本変形例に係る蓄電装置１ａは、実施の形態に係る蓄電装置１と共通する。 As shown in FIG. 9, a power storage device 1a according to this modification includes a power storage unit 10a and a control unit 20. The power storage unit 10 a includes a power storage element 400 , an exterior body 100 that houses the power storage element 400 , and an exhaust duct 200 a for guiding the gas discharged from the gas exhaust valve 413 of the power storage element 400 to the outside of the exterior body 100 . ing. The exhaust duct 200 a has a duct body 201 forming a gas flow path extending in the X-axis direction, and a connecting portion 210 projecting from the duct body 201 toward the gas discharge valve 413 . The opening 211 of the connecting portion 210 is arranged in a posture that covers the gas exhaust valve 413 . Regarding these configurations, the power storage device 1a according to the present modification is in common with the power storage device 1 according to the embodiment.
　本変形例において、接続部２１０は、外装体１００の壁部を貫通して配置されており、ダクト本体２０１は、外装体１００の外部に配置されている。この点において、本変形例に係る蓄電装置１ａは、実施の形態に係る蓄電装置１と異なる。 In this modified example, the connection part 210 is arranged through the wall of the exterior body 100 , and the duct main body 201 is arranged outside the exterior body 100 . In this respect, the power storage device 1a according to the present modification differs from the power storage device 1 according to the embodiment.
　この構成によれば、蓄電装置１ａにおいて、ガス排出弁４１３から排出されたガスは、接続部２１０を介して速やかに外装体１００の外部に配置されたダクト本体２０１に導かれる。従って、ガスの熱が蓄電素子４００に伝わり難くなる。 According to this configuration, in the power storage device 1a, the gas discharged from the gas discharge valve 413 is quickly guided to the duct main body 201 arranged outside the exterior body 100 via the connecting portion 210. Therefore, the heat of the gas is less likely to be transferred to the storage element 400 .
　（他の実施の形態）
　以上、本発明に係る蓄電装置について実施の形態及びその変形例を用いて説明したが、本発明は、上記実施の形態及びその変形例に限定されるものではない。今回開示された実施の形態は、全ての点で例示であって制限的なものではなく、本発明の範囲は、特許請求の範囲と均等の意味及び範囲内での全ての変更が含まれる。 (Other embodiments)
As described above, the power storage device according to the present invention has been described using the embodiment and its modification, but the present invention is not limited to the above-described embodiment and its modification. The embodiments disclosed this time are illustrative in all respects and are not restrictive, and the scope of the present invention includes all modifications within the meaning and range equivalent to the claims.
　上記実施の形態では、外装体１００は、第二外装体１２０が、Ｚ軸マイナス方向側に開口が形成された有底矩形筒状の部材であり、第一外装体１１０が、第二外装体１２０の当該開口を塞ぐ扁平な矩形状の部材であるとした。しかし、第一外装体１１０が、Ｚ軸プラス方向側に開口が形成された有底矩形筒状の部材であり、第二外装体１２０が、第一外装体１１０の当該開口を塞ぐ扁平な矩形状の蓋であってもよいし、その他どのような形状であってもよい。 In the above embodiment, the second exterior body 120 of the exterior body 100 is a bottomed rectangular tubular member having an opening formed in the negative direction of the Z axis, and the first exterior body 110 is the second exterior body. 120 is assumed to be a flat rectangular member that closes the opening. However, the first exterior body 110 is a bottomed rectangular cylindrical member with an opening formed in the positive direction of the Z axis, and the second exterior body 120 is a flat rectangular shape that closes the opening of the first exterior body 110 . It may be a shaped lid or any other shape.
　蓄電素子４００は、蓄電素子４００をＹ軸方向に跨ぐ形状の取付部材６１０（図３参照）によって外装体１００に取り付けられているとしたが、蓄電素子４００を外装体１００に取り付けるための部材の形状に特に限定はない。例えば、蓄電素子４００をＸ軸方向に跨ぐ形状の取付部材によって、蓄電素子４００が外装体１００に取り付けられていてもよい。 Although the power storage element 400 is attached to the exterior body 100 by the mounting member 610 (see FIG. 3) having a shape that straddles the power storage element 400 in the Y-axis direction, the member for attaching the power storage element 400 to the exterior body 100 is not described. The shape is not particularly limited. For example, the power storage element 400 may be attached to the exterior body 100 by an attachment member having a shape that straddles the power storage element 400 in the X-axis direction.
　蓄電装置１は、取付部材６１０を備えなくてもよい。例えば、第一外装体１１０及び第二外装体１２０の少なくとも一方が、１以上の蓄電素子４００の移動を規制する構造を有する場合、取付部材６１０等の部材を用いることなく、当該１以上の蓄電素子４００を外装体１００の所定の位置に実質的に固定することができる。 The power storage device 1 does not have to include the mounting member 610 . For example, when at least one of the first exterior body 110 and the second exterior body 120 has a structure that restricts movement of the one or more power storage elements 400, the one or more power storage elements can be stored without using a member such as the mounting member 610. The element 400 can be substantially fixed at a predetermined position of the outer package 100. FIG.
　接続部２１０の、取付部材６１０に対する取り付け構造は、図８に示される構造には限定されない。例えば、取付部材６１０の排気用開口部６１１の周縁に設けられた爪が、接続部２１０の外周面に設けられた凹部または孔に係合することで、接続部２１０が取付部材６１０に取り付けられてもよい。溶着、接着、圧入、嵌合、または締結などの、係合以外の手法によって、接続部２１０が取付部材６１０に取り付けられてもよい。 The mounting structure of the connecting portion 210 to the mounting member 610 is not limited to the structure shown in FIG. For example, the connecting portion 210 is attached to the mounting member 610 by engaging claws provided on the periphery of the exhaust opening 611 of the mounting member 610 with recesses or holes provided on the outer peripheral surface of the connecting portion 210 . may Connecting portion 210 may be attached to attachment member 610 by a method other than engagement, such as welding, adhesion, press-fitting, fitting, or fastening.
　第二外装体１２０に通気室１５０を設けることは必須ではない。例えば、ダクト端部２０５を外装体１００から露出するように配置し、そのダクト端部２０５に、排気ダクト２００から排出されるガスを所定の位置まで導く排気ホース等の部材が接続されてもよい。 It is not essential to provide the ventilation chamber 150 in the second exterior body 120. For example, the duct end portion 205 may be arranged so as to be exposed from the exterior body 100, and a member such as an exhaust hose may be connected to the duct end portion 205 for guiding the gas discharged from the exhaust duct 200 to a predetermined position. .
　蓄電装置１が備える外装体は、図１等に示す外装体１００のような、気密性が高いケース状の構造物である必要はない。蓄電装置１が備える外装体は、蓄電素子４００の外部に配置され、かつ、蓄電素子４００及び排気ダクト２００等を所定の位置に保持する機能を有すればよい。例えば、１以上の孔（開口部）が形成された壁部の組み合わせからなる構造物、または、フレームの組み合わせからなる構造物が、蓄電装置１が備える外装体として採用されてもよい。 The exterior body provided in the power storage device 1 does not need to be a highly airtight case-like structure like the exterior body 100 shown in FIG. 1 and the like. The exterior body provided in the power storage device 1 may be arranged outside the power storage element 400 and have a function of holding the power storage element 400, the exhaust duct 200, and the like at predetermined positions. For example, a structure composed of a combination of walls in which one or more holes (openings) are formed, or a structure composed of a combination of frames may be employed as the exterior body provided for power storage device 1 .
　蓄電装置１は、上述した全ての構成要素を備えている必要はない。例えば、蓄電装置１は、バスバーフレーム７００、スペーサ５１０若しくは５２０、または、エンドプレート６２０等を備えていなくてもよい。 The power storage device 1 does not need to include all the components described above. For example, power storage device 1 may not include busbar frame 700, spacer 510 or 520, end plate 620, or the like.
　蓄電素子４００は、Ｚ軸方向に１つしか並べられなくてもよいし、３つ以上並べられてもよい。Ｚ軸方向に複数の蓄電素子４００が並べられる場合、それぞれの蓄電素子４００のガス排出弁４１３を複数の接続部２１０が覆ってもよい。 Only one power storage element 400 may be arranged in the Z-axis direction, or three or more may be arranged. When a plurality of power storage elements 400 are arranged in the Z-axis direction, a plurality of connecting portions 210 may cover the gas discharge valves 413 of the respective power storage elements 400 .
　バスバーフレーム７００が壁部７１１を備える場合、壁部７１１は切欠部７１２を有しなくてもよい。バスバーフレーム７００は壁部７１１を備えなくてもよい。 When the busbar frame 700 includes the wall portion 711 , the wall portion 711 may not have the notch portion 712 . The busbar frame 700 may not have the wall portion 711 .
　上記実施の形態及びその変形例に含まれる構成要素を任意に組み合わせて構築される形態も、本発明の範囲内に含まれる。例えば、実施の形態に係る蓄電装置１についての上記の各種の補足事項が、変形例に係る蓄電装置１ａに適用されてもよい。 Forms constructed by arbitrarily combining the constituent elements included in the above embodiments and modifications thereof are also included within the scope of the present invention. For example, the various supplementary items described above regarding the power storage device 1 according to the embodiment may be applied to the power storage device 1a according to the modification.
　本発明は、リチウムイオン二次電池等の蓄電素子を備えた蓄電装置に適用できる。 The present invention can be applied to a power storage device having a power storage element such as a lithium ion secondary battery.
　　１、１ａ　蓄電装置
　　１０、１０ａ　蓄電ユニット
　１００　外装体
　１１０　第一外装体
　１２０　第二外装体
　２００、２００ａ　排気ダクト
　２０１　ダクト本体
　２０５　ダクト端部
　２１０　接続部
　２１１　開口部
　２１５　係合部
　４００　蓄電素子
　４１０　長側面
　４１１　短側面
　４１３　ガス排出弁
　４２０　電極端子
　６１０　取付部材
　６１１、７１０　排気用開口部
　６１５　係合孔
　７００　バスバーフレーム
　７０５　取付凸部
　７１１　壁部
　７１２　切欠部
　８００　バスバー Reference Signs List 1, 1a power storage device 10, 10a power storage unit 100 exterior body 110 first exterior body 120 second exterior body 200, 200a exhaust duct 201 duct body 205 duct end portion 210 connection portion 211 opening 215 engagement portion 400 storage element 410 length Side 411 Short Side 413 Gas Exhaust Valve 420 Electrode Terminal 610 Mounting Member 611, 710 Exhaust Opening 615 Engagement Hole 700 Busbar Frame 705 Mounting Projection 711 Wall 712 Notch 800 Busbar

Claims (6)

  1. 　内部のガスを排出可能なガス排出弁を備える蓄電素子と、
    　前記蓄電素子を、前記ガス排出弁が第一方向を向く姿勢で収容する外装体と、
    　前記ガス排出弁から排出されたガスを前記外装体の外部に導くための排気ダクトとを備え、
    　前記蓄電素子は、前記第一方向から見た場合、前記第一方向に直交する第二方向に長尺状の形状を有し、
    　前記排気ダクトは、
    　前記第二方向に延びるダクト本体と、前記ダクト本体から、前記ガス排出弁に向けて突出する接続部とを有し、前記接続部の開口部が前記ガス排出弁を覆う姿勢で配置されている、
    　蓄電装置。     a power storage element equipped with a gas discharge valve capable of discharging internal gas;
    an exterior body that accommodates the power storage element in a posture in which the gas discharge valve faces the first direction;
    an exhaust duct for guiding the gas discharged from the gas discharge valve to the outside of the exterior body,
    When viewed from the first direction, the storage element has an elongated shape in a second direction orthogonal to the first direction,
    The exhaust duct is
    A duct body extending in the second direction, and a connecting portion projecting from the duct body toward the gas discharge valve, wherein the opening of the connecting portion is arranged in a posture that covers the gas discharge valve. ,
    storage device.
  2. 　さらに、前記蓄電素子の前記ガス排出弁が設けられた面に配置された電極端子に接続されるバスバーと、
    　前記バスバーを保持するバスバーフレームとを備え、
    　前記排気ダクトは、前記接続部が前記バスバーフレームの排気用開口部を貫通し、前記接続部の開口部が前記ガス排出弁を覆う姿勢で配置されている、
    　請求項１記載の蓄電装置。     a bus bar connected to an electrode terminal disposed on a surface of the storage element provided with the gas discharge valve;
    a busbar frame that holds the busbar,
    The exhaust duct is disposed in such a manner that the connecting portion passes through the exhaust opening of the busbar frame, and the opening of the connecting portion covers the gas exhaust valve.
    The power storage device according to claim 1 .
  3. 　前記バスバーフレームは、前記排気用開口部の周囲に設けられた壁部を備え、
    　前記壁部は、前記第一方向及び前記第二方向に直交する第三方向の両端部のうちの少なくとも一方の端部に、切欠部を有する、
    　請求項２記載の蓄電装置。     The busbar frame includes a wall provided around the exhaust opening,
    The wall has a notch on at least one of both ends in a third direction orthogonal to the first direction and the second direction,
    The power storage device according to claim 2 .
  4. 　前記蓄電素子は、前記第一方向及び前記第二方向に直交する第三方向に複数並べられており、
    　前記接続部は、複数の前記蓄電素子のうち２つ以上の蓄電素子の前記ガス排出弁を一括して覆う形状に形成されている、
    　請求項１～３のいずれか一項に記載の蓄電装置。     a plurality of the storage elements are arranged in a third direction orthogonal to the first direction and the second direction;
    The connecting portion is formed in a shape that collectively covers the gas discharge valves of two or more of the plurality of power storage elements,
    The power storage device according to any one of claims 1 to 3.
  5. 　さらに、前記蓄電素子を前記外装体に取り付ける取付部材を備え、
    　前記排気ダクトは、前記接続部が前記取付部材に取り付けられた状態で配置されている、
    　請求項１～４のいずれか一項に記載の蓄電装置。     Further comprising a mounting member for mounting the power storage element to the exterior body,
    The exhaust duct is arranged with the connecting portion attached to the attachment member,
    The power storage device according to any one of claims 1 to 4.
  6. 　前記接続部は、前記外装体の壁部を貫通して配置されており、前記ダクト本体は、前記外装体の外部に配置されている、
    　請求項１～５のいずれか一項に記載の蓄電装置。     The connecting portion is arranged through a wall portion of the exterior body, and the duct body is arranged outside the exterior body,
    The power storage device according to any one of claims 1 to 5.
PCT/JP2022/015749 2021-06-04 2022-03-30 Power storage device WO2022254932A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013110040A (en) * 2011-11-23 2013-06-06 Denso Corp Battery unit
JP2013218790A (en) * 2012-04-04 2013-10-24 Tigers Polymer Corp Gas exhaust pipe
JP2014220157A (en) * 2013-05-09 2014-11-20 トヨタ自動車株式会社 Power storage device, board and assembly method of power storage device
US20210028426A1 (en) * 2019-07-26 2021-01-28 Contemporary Amperex Technology Co., Limited Battery assembly, battery pack and vehicle
CN112701394A (en) * 2020-12-29 2021-04-23 长城汽车股份有限公司 Battery pack for vehicle and vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013110040A (en) * 2011-11-23 2013-06-06 Denso Corp Battery unit
JP2013218790A (en) * 2012-04-04 2013-10-24 Tigers Polymer Corp Gas exhaust pipe
JP2014220157A (en) * 2013-05-09 2014-11-20 トヨタ自動車株式会社 Power storage device, board and assembly method of power storage device
US20210028426A1 (en) * 2019-07-26 2021-01-28 Contemporary Amperex Technology Co., Limited Battery assembly, battery pack and vehicle
CN112701394A (en) * 2020-12-29 2021-04-23 长城汽车股份有限公司 Battery pack for vehicle and vehicle

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