WO2022254932A1 - 蓄電装置 - Google Patents

蓄電装置 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
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English (en)
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/ja

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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, LIGHT-SENSITIVE OR TEMPERATURE-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, LIGHT-SENSITIVE OR TEMPERATURE-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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
PCT/JP2022/015749 2021-06-04 2022-03-30 蓄電装置 WO2022254932A1 (ja)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013110040A (ja) * 2011-11-23 2013-06-06 Denso Corp 電池ユニット
JP2013218790A (ja) * 2012-04-04 2013-10-24 Tigers Polymer Corp ガス排出管
JP2014220157A (ja) * 2013-05-09 2014-11-20 トヨタ自動車株式会社 蓄電装置、基板および蓄電装置の組立方法
US20210028426A1 (en) * 2019-07-26 2021-01-28 Contemporary Amperex Technology Co., Limited Battery assembly, battery pack and vehicle
CN112701394A (zh) * 2020-12-29 2021-04-23 长城汽车股份有限公司 用于车辆的电池包以及车辆

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013110040A (ja) * 2011-11-23 2013-06-06 Denso Corp 電池ユニット
JP2013218790A (ja) * 2012-04-04 2013-10-24 Tigers Polymer Corp ガス排出管
JP2014220157A (ja) * 2013-05-09 2014-11-20 トヨタ自動車株式会社 蓄電装置、基板および蓄電装置の組立方法
US20210028426A1 (en) * 2019-07-26 2021-01-28 Contemporary Amperex Technology Co., Limited Battery assembly, battery pack and vehicle
CN112701394A (zh) * 2020-12-29 2021-04-23 长城汽车股份有限公司 用于车辆的电池包以及车辆

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