WO2021166626A1 - Dispositif de stockage d'énergie - Google Patents

Dispositif de stockage d'énergie Download PDF

Info

Publication number
WO2021166626A1
WO2021166626A1 PCT/JP2021/003612 JP2021003612W WO2021166626A1 WO 2021166626 A1 WO2021166626 A1 WO 2021166626A1 JP 2021003612 W JP2021003612 W JP 2021003612W WO 2021166626 A1 WO2021166626 A1 WO 2021166626A1
Authority
WO
WIPO (PCT)
Prior art keywords
exterior body
power storage
ventilation
exhaust port
ventilation hole
Prior art date
Application number
PCT/JP2021/003612
Other languages
English (en)
Japanese (ja)
Inventor
泰徳 奥野
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
Publication of WO2021166626A1 publication Critical patent/WO2021166626A1/fr

Links

Images

Classifications

    • 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
    • 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
    • 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
    • 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 a power storage element and an exterior body accommodating the power storage element.
  • the power supply device disclosed in Patent Document 1 includes a battery chamber for accommodating a battery, an exhaust chamber partitioned from the battery compartment, a communication passage connecting the battery chamber and the exhaust chamber, and the exhaust chamber. It is provided with an exhaust passage that communicates with the outside of the exhaust chamber.
  • the exterior body is provided with an exhaust port for discharging internal gas to the outside.
  • This exhaust port serves as an entrance / exit inside and outside the exterior body. Therefore, a structure that prevents foreign matter such as water from entering the inside of the exterior body through the exhaust port is useful.
  • the structure becomes a flow path resistance for the gas discharged from the inside of the exterior body to the outside, it can be a problem from the viewpoint of efficient gas discharge. Specifically, if the gas inside the exterior body cannot be efficiently released to the outside of the exterior body, for example, the exterior body expands, which may cause damage to the exterior body. Further, while suppressing the invasion of foreign matter from the outside can be carried by other members such as a gas hose connected to the exhaust port, the structure is such that the gas inside the exterior body is efficiently discharged to the outside. Is not realistic to be carried by other external members.
  • the present invention has been made by the inventor of the present application with a new focus on the above-mentioned problems.
  • the present invention is a power storage device including an exterior body for accommodating a power storage element, and can improve reliability with a simple configuration.
  • the purpose is to provide the device.
  • the power storage device is a power storage device including a power storage element and an exterior body accommodating the power storage element, and the exterior body has a plurality of wall portions. It has an enclosed ventilation chamber, and the first wall portion of the plurality of wall portions is provided with an exhaust port for communicating the inside of the ventilation chamber and the outside of the exterior body, and the plurality of walls.
  • the second wall portion of the portions which is arranged so as to face the first wall portion, is provided with a first ventilation hole that allows gas to flow, and when the exhaust port is viewed in a plan view, the exhaust port is provided. At least a part of the first vent is arranged at a position overlapping the exhaust port.
  • the gas released from the power storage element can be discharged to the outside of the exterior body from the exhaust port through the ventilation chamber.
  • the gas flowing into the ventilation chamber from the first ventilation hole can be efficiently guided from the exhaust port to the outside. ..
  • the ventilation chamber functions as a buffer, so that the foreign matter does not enter the inside of the exterior body. It is suppressed.
  • reliability can be improved with a simple configuration.
  • the ventilation chamber further has a ventilation waterproof film arranged so as to close the first ventilation hole, and the first ventilation hole has a part of the first ventilation hole with the exhaust port in the plan view. It may be arranged at a position where they do not overlap.
  • the ventilation waterproof film is arranged in the first ventilation hole, even if water flows into the inside of the ventilation chamber from the exhaust port, it goes from the ventilation chamber to the inside of the exterior body.
  • the inflow of water is suppressed.
  • the pressure balance between the inside and outside of the exterior body is achieved through the ventilation waterproof membrane. As a result, the occurrence of damage to the exterior body due to the large pressure difference between the inside and outside of the exterior body is suppressed.
  • the first ventilation hole is arranged at a position deviated from the exhaust port (a position where a non-overlapping portion occurs)
  • the impact of foreign matter such as water flowing in from the exhaust port on the ventilation waterproof membrane is given to the ventilation waterproof membrane. Is suppressed.
  • the second wall portion is further provided with a second ventilation hole, and the ventilation chamber further opens the second ventilation hole from a closed state in which the second ventilation hole is closed by an increase in the internal pressure of the exterior body. It may have a valve member that shifts to an open state to be opened, and at least a part of the second vent may be arranged at a position overlapping the exhaust port in the plan view.
  • the pressure balance between the inside and outside of the exterior body is achieved by the first ventilation hole and the ventilation waterproof film.
  • the second vent and the valve member discharge gas from the inside to the outside of the exterior body, for example, when the power storage element is opened. Therefore, for example, when gas is ejected from the power storage element, an increase in the internal pressure of the exterior body is suppressed, and as a result, the possibility of damage to the exterior body due to the increase in the internal pressure is reduced.
  • the first ventilation hole and the second ventilation hole is arranged at a position overlapping with the exhaust port in a plan view, the first ventilation hole, the second ventilation hole and the exhaust port are interposed. Efficient gas discharge and outside air suction are performed. That is, the gas is appropriately exchanged through the ventilation chamber 601, which contributes to the improvement of the reliability of the power storage device 10.
  • the ventilation chamber further includes a valve member that shifts from a closed state in which the first ventilation hole is closed to an open state in which the first ventilation hole is opened due to an increase in the internal pressure of the exterior body.
  • the first vent may be arranged at a position where a part of the first vent does not overlap with the exhaust port in the plan view.
  • the valve member since the valve member is arranged in the first vent, the possibility that foreign matter such as water flows into the inside of the exterior body through the first vent is reduced in normal times. .. Further, for example, when the internal pressure of the exterior body suddenly rises when the valve of the power storage element is opened, the valve member is opened, so that gas is discharged from the inside to the outside of the exterior body. As a result, the increase in the internal pressure of the exterior body is suppressed, and as a result, the possibility of damage to the exterior body due to the increase in the internal pressure is reduced.
  • the first wall portion may be provided with an exhaust wall portion erected toward the second wall portion at a position facing the valve member around the exhaust port.
  • the exhaust wall portion since the exhaust wall portion is erected at a position facing the valve member, the movement of the valve member due to an increase in the internal pressure of the exterior body can be regulated by the exhaust wall portion. This reduces, for example, the possibility that the valve member will block the exhaust port. Further, since the exhaust wall portion functions as a rib erected on the first wall portion, for example, the strength of the first wall portion is improved. Therefore, for example, when a high pressure is applied to the first wall portion at the time of opening the valve of the power storage element, deformation or damage of the first wall portion is suppressed.
  • the opposite direction of the short side surfaces of the above, or the arrangement direction of the pair of electrode terminals in one power storage element is defined as the X-axis direction.
  • the alignment direction of the power storage element and the bus bar or the bus bar frame, the lineup direction of the container body and the lid of the power storage element, or the protruding direction of the electrode terminal of the power storage element is defined as the Y-axis direction.
  • the vertical direction is defined as the Z-axis direction.
  • These X-axis directions, Y-axis directions, and Z-axis directions are directions that intersect each other (orthogonally in the present 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 Y-axis direction and the Z-axis direction are not strictly the directions or postures.
  • the fact that two directions are orthogonal not only means that the two directions are completely orthogonal, but also that they are substantially orthogonal, that is, a difference of, for example, about several percent. It also means to include.
  • FIG. 1 is a perspective view showing the appearance of the power storage device 10 according to the embodiment.
  • FIG. 2 is an exploded perspective view of the power storage device 10 according to the embodiment.
  • FIG. 3 is an exploded perspective view showing the components housed in the exterior body 100 of the power storage device 10 according to the embodiment in an exploded manner.
  • the power storage device 10 is a device capable of charging electricity from the outside and discharging electricity to the outside, and has a substantially rectangular parallelepiped shape in the present embodiment.
  • the power storage device 10 is a battery module (assembled battery) used for power storage, power supply, and the like.
  • the power storage device 10 is used for driving a moving body such as an automobile, a motorcycle, a watercraft, a ship, a snowmobile, an agricultural machine, a construction machine, or a railroad vehicle for an electric railway, or for starting an engine. It is used as a battery or the like.
  • Examples of the above-mentioned vehicle include an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), and a gasoline vehicle.
  • the railway vehicle for the electric railway include a train, a monorail, and a linear motor car.
  • the power storage device 10 can also be used as a stationary battery or the like used for home use, a generator, or the like.
  • the power storage device 10 is connected to the exterior body 100, the power storage unit 200 housed in the exterior body 100, the mounting member 300, the electric device 400, and the electric device 400 by an electric wire or the like to the outside.
  • a connector 700 for transmitting a signal to and from is provided.
  • the exterior body 100 is a box-shaped (substantially rectangular parallelepiped) container (module case) that constitutes the housing of the power storage device 10. That is, the exterior body 100 is arranged outside the power storage unit 200, the electric device 400, etc., and these power storage units 200, the electric device 400, etc. are fixed at predetermined positions to protect them from impacts and the like.
  • the exterior body 100 includes, for example, polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE)), polyethylene terephthalate (including modified PPE).
  • PET polybutylene terephthalate
  • PEEK polyether ether ketone
  • PFA tetrafluoroethylene / perfluoroalkyl vinyl ether
  • PTFE polytetrafluoroethylene
  • PES polyether sulfone
  • ABS resin or , It is formed of an insulating member such as a composite material thereof, or an insulating coated metal or the like.
  • the exterior body 100 may be formed of a conductive member such as metal as long as the electrical insulation is maintained with respect to the power storage unit 200, the electric device 400, and the like.
  • the exterior body 100 has an exterior body main body 110 and a lid body 120.
  • the exterior body body 110 is a bottomed rectangular tubular housing having an opening, and accommodates a power storage element 210, an electric device 400, and the like.
  • the lid 120 is a flat rectangular member that closes the opening of the exterior body 110.
  • the lid 120 is joined to the exterior body 110 by an adhesive, heat seal, ultrasonic welding, or the like. As a result, the airtightness or watertightness of the joint portion between the lid body 120 and the exterior body body 110 is ensured.
  • the lid body 120 is provided with an external terminal 130 which is a pair of module terminals (total terminals) on the positive electrode side and the negative electrode side.
  • the power storage device 10 charges electricity from the outside and discharges electricity to the outside through the pair of external terminals 130.
  • the external terminal 130 is formed of, for example, a conductive member made of a metal such as aluminum, an aluminum alloy, copper, or a copper alloy.
  • the exterior body 100 is further attached with a ventilation chamber forming member that forms a ventilation chamber, and gas exchange between the inside and the outside of the exterior body 100 is performed through the ventilation chamber. Will be done.
  • the ventilation chamber forming member will be described later with reference to FIGS. 4 to 8.
  • the power storage unit 200 includes a power storage element 210, an end plate 230, a side plate 240, a bus bar 250, and a bus bar frame 260.
  • the power storage unit 200 is flat and X-axis in the Z-axis direction by being stacked flat in the Z-axis direction and arranged in the X-axis direction in a state where a plurality of power storage elements 210 are laid horizontally (sideways). It has a long shape in the direction.
  • the power storage unit 200 has a configuration in which a pair of end plates 230 and a pair of side plates 240 sandwich a plurality of power storage elements 210 arranged in the Z-axis direction and the X-axis direction in the Z-axis direction and the X-axis direction. doing. Further, a bus bar 250 is arranged on the bus bar frame 260 and is connected to the power storage element 210.
  • the power storage unit 200 may have other members such as spacers arranged on the side of the power storage element 210 in the Z-axis direction.
  • the electric device 400 is a device capable of monitoring the state of the power storage element 210 included in the power storage unit 200 and controlling the power storage element 210, and is attached to the power storage unit 200.
  • the electric device 400 has, for example, electrical components (electrical components) such as a circuit board, a shunt resistor, and a connector that monitor the charge state and discharge state of the power storage element 210 and control the charge / discharge state of the power storage element 210. ing.
  • the electrical device 400 has a configuration in which these electrical components are housed in an insulating cover.
  • the mounting member 300 is a member for mounting the electric device 400 to the power storage unit 200.
  • the mounting member 300 is made of, for example, any electrically insulating resin material that can be used for the exterior body 100.
  • the bus bar unit 500 makes an electrical connection between the power storage unit 200 and the electric device 400, an electrical connection between the electric device 400 and the external terminal 130, and an electrical connection between the power storage unit 200 and the external terminal 130. It is a member.
  • the bus bar unit 500 has a bus bar 510 and a relay 520.
  • the bus bar 510 is a plate-shaped member that connects the bus bar 250 of the power storage unit 200 and the electric device 400.
  • the bus bar 510 is formed 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.
  • the relay 520 is a relay (relay) arranged between the power storage unit 200 and the external terminal 130 via a bus bar 510.
  • the power storage element 210 is a secondary battery (cell battery) capable of charging electricity and discharging electricity, and more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. ..
  • each of the plurality of power storage elements 210 has a container for accommodating an electrode body, an electrolytic solution, and the like.
  • the container is provided with two electrode terminals 211 which are a positive electrode terminal and a negative electrode terminal, and a gas discharge valve 215 for discharging the gas inside the container to the outside when the internal pressure of the container rises excessively. There is.
  • the power storage element 210 has a flat rectangular parallelepiped shape (square shape), and in the present embodiment, the eight power storage elements 210 are laid horizontally (sideways) (the long side surface of the power storage element 210 is Z). They are arranged in the Z-axis direction and the X-axis direction (in the state of facing the axial direction). Specifically, four power storage elements 210 on the minus direction of the X axis are stacked (flat stacking) in the Z axis direction, and four power storage elements 210 on the plus direction side of the X axis are stacked (flat stack) in the Z axis direction. ) Has been done. The number and arrangement layout of these power storage elements 210 are examples. The number and arrangement layout of the power storage elements 210 included in the power storage device 10 may be appropriately determined according to the capacity required for the power storage device 10, the size or shape of the exterior body 100, and the like.
  • the power storage element 210 is not limited to the non-aqueous electrolyte secondary battery, and may be a secondary battery other than the non-aqueous electrolyte secondary battery, or may be a capacitor. Further, the power storage element 210 may be a primary battery that can use the stored electricity without being charged by the user, instead of the secondary battery. Further, the power storage element 210 may be a laminated type power storage element.
  • the end plate 230 and the side plate 240 are members (constraining members) that press (constrain) the power storage element 210 from the outside in the Z-axis direction.
  • the end plate 230 and the side plate 240 are made of metal members such as stainless steel, aluminum, aluminum alloy, iron, and galvanized steel sheet, but may be made of insulating members such as highly rigid resin. good.
  • the bus bar 250 is a flat plate-shaped member connected to the power storage element 210. Specifically, the bus bar 250 is arranged in the negative direction of the Y-axis of the plurality of power storage elements 210, and is connected (joined) to the electrode terminals 211 of the plurality of power storage elements 210 and the bus bar 510. That is, the bus bar 250 connects the electrode terminals 211 of the plurality of power storage elements 210 to each other, and also connects the electrode terminals 211 of the power storage elements 210 at the ends and the bus bar 510. In the present embodiment, the bus bar 250 and the electrode terminal 211 of the power storage element 210 are connected (joined) by welding, but may be connected (joined) by bolt fastening or the like.
  • the bus bar 250 is made of, for example, any material that can be used for the bus bar 510. Further, in the present embodiment, in the bus bar 250, two power storage elements 210 are connected in parallel to form four sets of power storage element groups, and the four sets of power storage element groups are connected in series. May have all eight power storage elements 210 connected in series, or may have other configurations.
  • the bus bar frame 260 is a flat rectangular insulating member capable of electrically insulating the bus bar 250 from other members and restricting the position of the bus bar 250.
  • the bus bar frame 260 is formed of, for example, any electrically insulating resin material that can be used for the exterior body 100.
  • the bus bar frame 260 is arranged in the negative direction of the Y-axis of the plurality of power storage elements 210, and is positioned with respect to the plurality of power storage elements 210. Further, the bus bar 250, the electric wire 251 and the thermistor 252 are positioned on the bus bar frame 260. As a result, the bus bar 250 is positioned with respect to the plurality of power storage elements 210 and is joined to the electrode terminals of the plurality of power storage elements 210.
  • FIG. 4 is a perspective view of the ventilation chamber forming member 600 and the exterior body main body 110 according to the embodiment.
  • FIG. 5 is an exploded perspective view showing the ventilation chamber forming member 600 according to the embodiment separated from the exterior body main body 110.
  • FIG. 6 is a perspective view showing the inner configuration of the ventilation chamber forming member 600 according to the embodiment.
  • the cover member 620 and the valve member 630 are shown separately from the ventilation chamber forming member 600.
  • FIG. 7 is a cross-sectional view showing the configuration of the ventilation chamber 601 according to the embodiment.
  • FIG. 5 is an exploded perspective view showing the ventilation chamber forming member 600 according to the embodiment separated from the exterior body main body 110.
  • FIG. 6 is a perspective view showing the inner configuration of the ventilation chamber forming member 600 according to the embodiment.
  • the cover member 620 and the valve member 630 are shown separately from the ventilation chamber forming member 600.
  • FIG. 7 is a cross-sectional view showing the configuration of the ventilation chamber 601 according to the embodiment.
  • FIG. 8 is a plan view showing the positional relationship between the exhaust port 112, the first ventilation hole 611, and the second ventilation hole 612 according to the embodiment.
  • the first vent holes 611 and the second vent holes 612 are illustrated by dotted circles in order to clearly show the positional relationship.
  • the ventilation chamber forming member 600 is attached below and at the end of the exterior body body 110 of the exterior body 100.
  • the ventilation chamber forming member 600 includes a ventilation chamber 601 formed inside the ventilation chamber forming member 600 and the inside of the exterior body 100 (the space in the internal space of the exterior body 100 excluding the ventilation chamber forming member 600, the same applies hereinafter. It has two vents that communicate with.).
  • the ventilation chamber forming member 600 has a first ventilation hole 611 and a second ventilation hole 612.
  • the first ventilation hole 611 and the second ventilation hole 612 are arranged at positions facing the exhaust port 112 provided in the exterior body 100 and communicating the inside and the outside of the exterior body 100.
  • the first ventilation hole 611 is covered with a cover member 620 attached to the inner surface of the ventilation chamber forming member 600.
  • the cover member 620 is a breathable waterproof membrane having a function of allowing gas to pass through and not allowing liquid to pass through.
  • the breathable waterproof membrane is a membrane made of a waterproof and breathable material having waterproofness and breathability (breathability) such as Gore-Tex (registered trademark) and TEMISH (registered trademark). Therefore, for example, when a pressure difference between the inside and outside of the exterior body 100 is about to occur due to a change in the pressure or temperature of the environment in which the power storage device 10 is placed, the exterior body 100 is passed through the exhaust port 112 and the first ventilation hole 611. Gas (air) is exchanged inside and outside. As a result, the pressure inside and outside the exterior body 100 is in an equilibrium state, and deformation of the exterior body 100 due to the pressure difference between the inside and outside of the exterior body 100 is suppressed. Further, since the cover member 620, which is a ventilation waterproof film, does not allow water to pass through, foreign matter such as water is suppressed from entering the inside of the exterior body 100 through the first ventilation hole 611.
  • the second ventilation hole 612 is closed by a valve member 630 that shifts from a closed state in which the second ventilation hole 612 is closed by an increase in the internal pressure of the exterior body 100 to an open state in which the second ventilation hole 612 is opened. More specifically, the valve member 630 is covered on the tubular portion 614 provided in the ventilation chamber 601 at a position communicating with the second ventilation hole 612.
  • the valve member 630 is a cap-shaped member made of a highly heat-resistant elastic material such as silicone rubber or a highly durable elastic material such as ethylene propylene diene rubber (EPDM).
  • the valve member 630 deforms or / or moves in response to the internal pressure of the exterior body 100 to shift from a closed state in which the second ventilation hole 612 is closed to an open state in which the second ventilation hole 612 is opened.
  • the second ventilation hole 612 is released.
  • the gas inside the exterior body 100 is discharged to the outside of the exterior body 100 through the second ventilation hole 612 and the exhaust port 112, and the increase in the internal pressure of the exterior body 100 is suppressed.
  • the second ventilation hole 612 is in a state of being closed by the valve member 630, whereby foreign matter such as water is suppressed from entering the inside of the exterior body 100 through the second ventilation hole 612. Will be done.
  • the exhaust port 112 is provided on the first wall portion 111 of the exterior body main body 110, and the ventilation chamber forming member 600 covers the exhaust port 112. It is installed.
  • the second wall portion 613 of the ventilation chamber forming member 600 provided with the first ventilation hole 611 and the second ventilation hole 612 is arranged so as to face the first wall portion 111 provided with the exhaust port 112.
  • the exhaust port 112 is provided with a partition portion 112a that forms a plurality of through holes, each of which serves as a gas flow path, by partitioning a plurality of gas flow paths that pass through the exhaust port 112.
  • the partition portion 112a can prevent foreign matter from entering the ventilation chamber 601 from the exhaust port 112.
  • an exhaust wall portion 112b is erected on the peripheral edge of the exhaust port 112 inside the ventilation chamber 601 so as to surround the exhaust port 112.
  • the exhaust wall portion 112b has a function of damming the adhesive 660 before solidification, a function of reducing the possibility that the valve member 630 at the opposite position blocks the exhaust port 112, and the like.
  • the exhaust wall portion 112b is composed of four portions arranged in the circumferential direction, and a gap is provided between these portions. Therefore, even if a liquid such as water flows into the ventilation chamber 601, the liquid can be discharged to the outside of the exhaust port 112 through the gap.
  • the wall portion forming the ventilation chamber 601 has three openings (exhaust port 112, first ventilation hole 611,) communicating the inside of the ventilation chamber 601 and the outside of the ventilation chamber 601. And a second ventilation hole 612) is provided. These three openings are in the positional relationship shown in FIG. Specifically, when the exhaust port 112 is viewed in a plan view (when viewed from the Z-axis plus direction), at least a part of the first ventilation holes 611 is arranged at a position overlapping the exhaust port 112. Similarly, for the second ventilation hole 612, at least a part of the first ventilation hole 611 is arranged at a position overlapping the exhaust port 112. As a result, the gas flow through the first ventilation hole 611 and the exhaust port 112 and the gas flow through the second ventilation hole 612 and the exhaust port 112 are efficiently performed.
  • the ventilation chamber forming member 600 is formed of, for example, any electrically insulating resin material that can be used for the exterior body 100, and in the present embodiment, the ventilation chamber forming member 600 is joined to the exterior body 100 by an adhesive 660.
  • the first wall portion 111 of the exterior body body 110 is provided with an annular mounting groove 113 surrounding the exhaust port 112, and the ventilation chamber forming member 600 is provided with a mounting groove.
  • a protrusion 650 having a shape and size corresponding to 113 is provided.
  • the protrusion 650 is fitted with the adhesive 660 flowing into the mounting groove 113.
  • the adhesive 660 solidifies, so that the ventilation chamber forming member 600 is fixed to the exterior body body 110.
  • the connection portion between the peripheral edge portion of the ventilation chamber forming member 600 and the exterior body main body 110 is filled with the adhesive 660, and high watertightness and airtightness are maintained at the connection portion.
  • NS any electrically insulating resin material that can be used for the exterior body 100
  • the ventilation chamber forming member 600 has a locked portion 640 that is locked to a part of the exterior body 100.
  • the ventilation chamber forming member 600 is attached to the exterior body 100 in a state where the locked portion 640 is locked to the part thereof.
  • the locked portion 640 has a pair of claw portions 641 and is engaged by hooking the pair of claw portions 641 on the mesh-shaped partition portion 112a provided in the exhaust port 112 of the exterior body body 110. It has been stopped. That is, as described above, in the step of fixing the ventilation chamber forming member 600 to the exterior body 100 with the adhesive 660, the ventilation chamber forming member 600 has the locked portion 640 locked to the partition portion 112a. , The position of the exterior body 100 is restricted. As a result, the ventilation chamber forming member 600 is accurately fixed to the exterior body 100.
  • the power storage device 10 includes a power storage element 210 and an exterior body 100 that houses the power storage element 210.
  • the exterior body 100 has a ventilation chamber 601 surrounded by a plurality of wall portions, and the inside of the ventilation chamber 601 and the outside of the exterior body 100 communicate with the first wall portion 111 of the plurality of wall portions.
  • An exhaust port 112 is provided.
  • the second wall portion 613 arranged to face the first wall portion 111 is provided with a first vent hole 611 that allows the flow of gas.
  • FIG. 8 when the exhaust port 112 is viewed in a plan view, at least a part of the first ventilation holes 611 is arranged at a position overlapping the exhaust port 112.
  • the gas released from the power storage element 210 can be discharged to the outside of the exterior body 100 from the exhaust port 112 via the ventilation chamber 601.
  • the gas flowing into the ventilation chamber 601 from the first ventilation hole 611 is efficiently fed from the exhaust port 112. Can be guided to the outside.
  • the ventilation chamber 601 functions as a buffer, so that the foreign matter exterior body 100 Invasion into the inside is suppressed.
  • the ventilation chamber 601 further has a cover member 620 which is a ventilation waterproof film arranged so as to close the first ventilation hole 611. As shown in FIG. 8, the first ventilation hole 611 is arranged at a position where a part of the first ventilation hole 611 does not overlap with the exhaust port 112 in a plan view.
  • the cover member 620 which is a ventilation waterproof film in the first ventilation hole 611, even if water flows into the ventilation chamber 601 from the exhaust port 112, the exterior is removed from the ventilation chamber 601. The inflow of water into the body 100 is suppressed. Further, for example, even when the external pressure changes significantly during the transportation of the power storage device 10, the pressure balance between the inside and outside of the exterior body 100 is achieved via the cover member 620. As a result, the occurrence of damage or the like caused by the large pressure difference between the inside and outside of the exterior body 100 is suppressed.
  • the first ventilation hole 611 is arranged at a position deviated from the exhaust port 112 (a position where a non-overlapping portion is generated), so that foreign matter such as water flowing in from the exhaust port 112 can be removed from the cover member 620.
  • the impact on the surface is suppressed.
  • the second wall portion 613 is further provided with the second ventilation hole 612, and the ventilation chamber 601 is further closed by increasing the internal pressure of the exterior body 100 to close the second ventilation hole 612. It has a valve member 630 that shifts from the state to the open state in which the second vent 612 is opened.
  • the second ventilation hole 612 is arranged at a position overlapping the exhaust port 112 as shown in FIG.
  • the pressure balance between the inside and outside of the exterior body 100 in the normal state is achieved by the first ventilation hole 611 and the cover member 620. Further, the second ventilation hole 612 and the valve member 630 discharge the gas from the inside to the outside of the exterior body 100, for example, when the power storage element 210 is opened. Therefore, for example, when gas is ejected from the power storage element 210, an increase in the internal pressure of the exterior body 100 is suppressed, and as a result, the possibility of damage to the exterior body 100 due to the increase in the internal pressure is reduced.
  • the first ventilation hole 611 and the second ventilation hole 612 are exhausted. Efficient gas discharge, outside air suction, and the like are performed through the mouth 112. That is, the gas is appropriately exchanged through the ventilation chamber 601, which contributes to the improvement of the reliability of the power storage device 10.
  • both the first ventilation hole 611 and the second ventilation hole 612 are arranged in the ventilation chamber 601 even if only one ventilation hole (for example, the first ventilation hole 611) is arranged. good.
  • the valve member 630 may be arranged with respect to the first ventilation hole 611 by providing the tubular portion 614 at a position communicating with the first ventilation hole 611. That is, the ventilation chamber 601 further has a valve member 630 that shifts from a closed state in which the first ventilation hole 611 is closed by an increase in the internal pressure of the exterior body 100 to an open state in which the first ventilation hole 611 is opened.
  • the pores 611 may be arranged at a position where a part of the first ventilation holes 611 does not overlap with the exhaust port 112 in a plan view.
  • valve member 630 is arranged in the first ventilation hole 611, foreign matter such as water can flow into the exterior body 100 through the first ventilation hole 611 in a normal state.
  • the sex is reduced.
  • the valve member 630 is opened, so that gas is discharged from the inside to the outside of the exterior body 100.
  • the increase in the internal pressure of the exterior body 100 is suppressed, and as a result, the possibility of damage to the exterior body 100 due to the increase in the internal pressure is reduced.
  • the flat plate-shaped cover member arranged so as to close the first ventilation hole 611 is in an open state in which the first ventilation hole 611 is opened from the closed state in which the first ventilation hole 611 is closed by an increase in the internal pressure of the exterior body 100. It may function as a valve member that shifts to. That is, the cover member fixed by adhesion or welding around the first ventilation hole 611 on the inner surface of the second wall portion 613 is broken by the internal pressure of the exterior body 100, or from the second wall portion 613. It may shift to an open state in which the first ventilation hole 611 is opened due to peeling or the like. Further, the cover member may be a ventilation waterproof film, and may not have at least one of a ventilation function and a waterproof function.
  • valve member that discharges gas in an emergency does not have to be cap-shaped as shown in FIGS. 6 and 7, and is deformed, damaged, or moved when the internal pressure of the exterior body 100 exceeds a predetermined value. Any member may be used as long as it is in a state where gas can be discharged by equalizing.
  • the first wall portion 111 is provided with an exhaust wall portion 112b erected toward the second wall portion 613 at a position facing the valve member 630 around the exhaust port 112. ing.
  • the exhaust wall portion 112b Since the exhaust wall portion 112b is erected at a position facing the valve member 630 in this way, the movement of the valve member 630 due to an increase in the internal pressure of the exterior body 100 can be regulated by the exhaust wall portion 112b. .. This reduces the possibility that, for example, the valve member 630 will block the exhaust port 112. Further, since the exhaust wall portion 112b functions as a rib erected on the first wall portion 111, for example, the strength of the first wall portion 111 is improved. Therefore, for example, when a high pressure is applied to the first wall portion 111 when the power storage element 210 is opened, deformation or damage of the first wall portion 111 is suppressed.
  • the power storage device 10 includes a power storage element 210, an exterior body 100 that houses the power storage element 210, and an exterior body 100 having an exhaust port 112 that communicates the inside and the outside of the exterior body 100, and a ventilation chamber forming member 600.
  • the ventilation chamber forming member 600 is attached to the exterior body 100 inside the exterior body 100, and forms the ventilation chamber 601 at a position continuous with the exhaust port 112.
  • the ventilation chamber forming member 600 has a first ventilation hole 611 that communicates the inside of the exterior body 100 with the inside of the ventilation chamber 601 and a cover member 620 that closes the first ventilation hole 611.
  • the ventilation chamber forming member 600 is arranged inside the exhaust port 112 which is the outlet of the gas from the exterior body 100 when the gas inside the exterior body 100 is discharged to the outside. .. Further, the ventilation chamber forming member 600 is provided with a cover member 620 that closes the first ventilation hole 611. Thereby, for example, the function inspection of the ventilation chamber 601 can be performed in units of relatively small parts (ventilation chamber forming member 600). Further, even if there is a defect in the function, it is economical because it is sufficient to dispose of the component (ventilation chamber forming member 600) in units of the component (ventilation chamber forming member 600).
  • the adhesive 660 is used for fixing the ventilation chamber forming member 600 to the exterior body 100, but even when the adhesive 660 protrudes, the ventilation chamber forming member 600 Since the fixed position is inside the exterior body 100, the adhesive 660 that has squeezed out is not observed in appearance. Therefore, for example, it is possible to fix the ventilation chamber forming member 600 to the exterior body 100 by using a relatively large amount of the adhesive 660, whereby the connecting portion between the ventilation chamber forming member 600 and the exterior body 100 can be fixed. Can improve airtightness or watertightness in.
  • the ventilation chamber forming member 600 to which a large pressure is applied when the power storage element 210 is opened is arranged inside the exterior body 100, the pressure is applied in the direction of removing the ventilation chamber forming member 600 from the exterior body 100. It works in the direction of pressing against the inner wall of the exterior body 100. Therefore, when the gas inside the exterior body 100 is discharged to the outside, it is unlikely that the ventilation chamber forming member 600, which is a member different from the exterior body 100, will fall off from the exterior body 100. As described above, according to the power storage device 10 according to the present embodiment, reliability can be improved with a simple configuration.
  • the ventilation chamber forming member 600 has a locked portion 640 that is locked to a part of the exterior body 100, and the locked portion 640 is locked to the part. It is attached to the exterior body 100.
  • the adhesive 660 when the adhesive 660 is used for fixing the ventilation chamber forming member 600 to the exterior body 100 as in the present embodiment, the adhesive 660 is used until the adhesive 660 solidifies. Pushing back of the ventilation chamber forming member 600 is suppressed. As a result, the ventilation chamber forming member 600 can be accurately fixed to the exterior body 100.
  • the exhaust port 112 provided in the exterior body 100 divides a plurality of gas flow paths passing through the exhaust port 112 into a plurality of through holes, each of which serves as a gas flow path.
  • a partition portion 112a to be formed is provided.
  • the locked portion 640 of the ventilation chamber forming member 600 is locked to the partition portion 112a which is a part of the exterior body 100.
  • the partition portion 112a is provided in the exhaust port 112, it is possible to suppress the invasion of foreign matter from the exhaust port 112 into the inside of the ventilation chamber 601. Further, since the ventilation chamber forming member 600 can be locked by using the partition portion 112a, it is not necessary to provide a dedicated portion for locking the ventilation chamber forming member 600. That is, the ventilation chamber forming member 600 can be locked without complicating the configuration of the ventilation chamber 601, whereby the ventilation chamber forming member 600 can be accurately fixed to the exterior body 100 as described above. Can be done.
  • a breathable waterproof membrane is adopted as the cover member 620. Therefore, even if water flows into the ventilation chamber 601 from the exhaust port 112, the inflow of water from the ventilation chamber 601 into the exterior body 100 is suppressed. Further, for example, even when the external pressure changes significantly during the transportation of the power storage device 10, the pressure balance between the inside and outside of the exterior body 100 is achieved via the cover member 620. As a result, the occurrence of damage or the like caused by the large pressure difference between the inside and outside of the exterior body 100 is suppressed. These effects contribute to the improvement of the reliability of the power storage device 10.
  • the ventilation chamber forming member 600 further includes a second ventilation hole 612 that communicates the inside of the exterior body 100 and the inside of the ventilation chamber 601 and a valve member 630 that closes the second ventilation hole 612. Have.
  • the valve member 630 shifts from a closed state in which the second ventilation hole 612 is closed due to an increase in the internal pressure of the exterior body 100 to an open state in which the second ventilation hole 612 is opened.
  • the pressure balance between the inside and outside of the exterior body 100 in the normal state is achieved by the first ventilation hole 611 and the cover member 620. Further, the second ventilation hole 612 and the valve member 630 discharge the gas from the inside to the outside of the exterior body 100, for example, when the power storage element 210 is opened. Therefore, for example, when gas is ejected from one or more power storage elements 210, an increase in the internal pressure of the exterior body 100 is suppressed, and as a result, the possibility of damage to the exterior body 100 due to the increase in the internal pressure is reduced. That is, in the power storage device 10 of the present embodiment, the inside and outside of the exterior body 100 are appropriately ventilated in each of the normal time and the emergency time. As a result, the reliability of the power storage device 10 is further improved.
  • the exterior body 100 has an exhaust wall portion 112b provided so as to surround the exhaust port 112 on the inner surface of the exterior body 100.
  • the adhesive 660 when a relatively large amount of the adhesive 660 is used to improve the airtightness or watertightness of the connection portion between the ventilation chamber forming member 600 and the exterior body 100, the adhesive is used. Even when the 660 protrudes from the connecting portion, the adhesive 660 can be dammed by the exhaust wall portion 112b. That is, it is possible to prevent the adhesive 660 protruding from the connecting portion from flowing out to the outside of the exterior body 100 through the exhaust port 112, and to prevent the exhaust port 112 from being clogged by the adhesive 660. Further, in the present embodiment, as shown in FIG.
  • the valve member 630 since the exhaust wall portion 112b is arranged at a position facing the valve member 630, the valve member 630 receives the internal pressure of the exterior body 100 and the valve member 630 is on the side of the exhaust port 112. The movement of the valve member 630 is restricted by the exhaust wall portion 112b even when the valve member is moved to. This reduces the possibility that the valve member 630 will block the exhaust port 112. Therefore, the gas discharge by shifting the valve member 630 to the open state is executed more reliably. Further, since the exhaust wall portion 112b functions as a rib erected on the first wall portion 111, for example, the strength of the first wall portion 111 is improved. Therefore, for example, when a high pressure is applied to the first wall portion 111 when the power storage element 210 is opened, deformation or damage of the first wall portion 111 is suppressed.
  • the exhaust port 112 is provided in the exterior body 100 so as to discharge gas downward (when the Z-axis plus direction is upward) from the exterior body 100, but the exhaust port 112 of the exhaust port 112
  • the orientation is not limited to this.
  • the arrangement position of the ventilation chamber 601 does not have to be a position close to the bottom surface of the exterior body main body 110.
  • the ventilation chamber 601 may be provided above the exterior body 100.
  • the exhaust port 112 may be provided on the lid 120 in a posture of discharging gas upward or sideways, for example.
  • the partition portion 112a may not be provided in the exhaust port 112.
  • the ventilation chamber forming member 600 may be fixed to the exterior body 100 by heat welding. Even in this case, it is possible to give high airtightness or watertightness to the connecting portion between the ventilation chamber forming member 600 and the exterior body 100. Further, since the connecting portion is inside the exterior body 100, even if a welding mark appears in the connecting portion, the welding mark is not observed in appearance. Therefore, for example, by increasing the amount of melting in the connecting portion of the ventilation chamber forming member 600 and the exterior body 100, it is possible to further improve the airtightness or watertightness in the connecting portion.
  • the ventilation chamber 601 does not need to be formed by the ventilation chamber forming member 600 attached to the exterior body 100.
  • a ventilation chamber may be formed as a structure integrated with the lid 120 of the exterior body 100 or the exterior body main body 110. Even in this case, when the exhaust port 112 is viewed in a plan view, at least a part of the first ventilation hole 611 is arranged at a position overlapping the exhaust port 112, so that the first ventilation hole 611 is ventilated. The gas flowing into the chamber 601 can be efficiently guided to the outside from the exhaust port 112.
  • the present invention can be realized not only as the power storage device 10, but also as the exterior body 100 provided in the power storage device 10.
  • the present invention can be applied to a power storage device provided with a power storage element such as a lithium ion secondary battery.
  • Power storage device 100 Exterior body 110 Exterior body body 111 First wall part 112 Exhaust port 112a Partition part 112b Exhaust wall part 113 Mounting groove 120 Lid body 210 Power storage element 215 Gas discharge valve 600 Ventilation chamber forming member 601 Ventilation chamber 611 First passage Pore 612 Second ventilation hole 613 Second wall part 614 Cylindrical part 620 Cover member 630 Valve member 640 Locked part 641 Claw part 650 Protruding part 660 Adhesive

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Battery Mounting, Suspending (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

La présente invention concerne un dispositif de stockage d'énergie (10) comprenant un élément de stockage d'énergie (210) et un corps extérieur (100) logeant l'élément de stockage d'énergie (210). Le corps extérieur (100) comprend une chambre de ventilation (601) entourée par une pluralité de parties de paroi, et un orifice d'échappement (112) à travers lequel l'intérieur de la chambre de ventilation (601) et l'extérieur du corps extérieur (100) communiquent est disposé dans une première partie de paroi (111) parmi la pluralité de parties de paroi. Dans une seconde partie de paroi (613), disposée de façon à faire face à la première partie de paroi (111) parmi la pluralité de parties de paroi, un premier trou de ventilation (611) permettant la circulation de gaz est prévu. Comme le montre la FIG. 8, au moins une partie du premier trou de ventilation (611) est disposée à une position chevauchant l'orifice d'échappement (112) lorsque l'orifice d'échappement (112) est vu selon une vue en plan.
PCT/JP2021/003612 2020-02-21 2021-02-02 Dispositif de stockage d'énergie WO2021166626A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020-028297 2020-02-21
JP2020028297 2020-02-21

Publications (1)

Publication Number Publication Date
WO2021166626A1 true WO2021166626A1 (fr) 2021-08-26

Family

ID=77391344

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/003612 WO2021166626A1 (fr) 2020-02-21 2021-02-02 Dispositif de stockage d'énergie

Country Status (1)

Country Link
WO (1) WO2021166626A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09181460A (ja) * 1995-12-25 1997-07-11 Hitachi Telecom Technol Ltd 屋外設置筐体の防水構造
JP2015056325A (ja) * 2013-09-12 2015-03-23 株式会社リチウムエナジージャパン 蓄電装置
JP2015056324A (ja) * 2013-09-12 2015-03-23 株式会社リチウムエナジージャパン 蓄電装置
JP2017152162A (ja) * 2016-02-23 2017-08-31 株式会社Ｇｓユアサ 蓄電装置
JP2019160716A (ja) * 2018-03-16 2019-09-19 株式会社Ｇｓユアサ 蓄電装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09181460A (ja) * 1995-12-25 1997-07-11 Hitachi Telecom Technol Ltd 屋外設置筐体の防水構造
JP2015056325A (ja) * 2013-09-12 2015-03-23 株式会社リチウムエナジージャパン 蓄電装置
JP2015056324A (ja) * 2013-09-12 2015-03-23 株式会社リチウムエナジージャパン 蓄電装置
JP2017152162A (ja) * 2016-02-23 2017-08-31 株式会社Ｇｓユアサ 蓄電装置
JP2019160716A (ja) * 2018-03-16 2019-09-19 株式会社Ｇｓユアサ 蓄電装置

Similar Documents

Publication Publication Date Title
JP6707895B2 (ja) 蓄電装置
JP6926712B2 (ja) 蓄電装置
JP7172076B2 (ja) 蓄電装置
JP2021132022A (ja) 蓄電装置
WO2021166626A1 (fr) Dispositif de stockage d'énergie
JP2021150141A (ja) 蓄電装置
WO2021024728A1 (fr) Dispositif de stockage d'énergie
WO2021166554A1 (fr) Dispositif de stockage d'énergie
EP4350865A1 (fr) Dispositif de stockage d'énergie
JP7310426B2 (ja) 蓄電装置
EP4195389A1 (fr) Dispositif de stockage d'énergie
JP7427903B2 (ja) 蓄電装置
JP6557365B2 (ja) 蓄電装置
JP2021111562A (ja) 蓄電装置
WO2021166624A1 (fr) Dispositif de stockage électrique
WO2020189161A1 (fr) Dispositif de stockage d'énergie
US20240145816A1 (en) Energy storage apparatus
WO2022254932A1 (fr) Dispositif de stockage d'électricité
WO2021187133A1 (fr) Dispositif de stockage d'énergie
WO2021200772A1 (fr) Dispositif de stockage d'énergie
WO2022220117A1 (fr) Dispositif de stockage d'énergie
JP7490998B2 (ja) 蓄電装置
WO2021200771A1 (fr) Dispositif de stockage d'électricité
WO2021187219A1 (fr) Dispositif de stockage d'énergie
WO2021166625A1 (fr) Dispositif de stockage d'énergie

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21757975

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21757975

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP