WO2016076417A1 - Unité de batterie de stockage et dispositif de stockage d'énergie - Google Patents

Unité de batterie de stockage et dispositif de stockage d'énergie Download PDF

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Publication number
WO2016076417A1
WO2016076417A1 PCT/JP2015/081974 JP2015081974W WO2016076417A1 WO 2016076417 A1 WO2016076417 A1 WO 2016076417A1 JP 2015081974 W JP2015081974 W JP 2015081974W WO 2016076417 A1 WO2016076417 A1 WO 2016076417A1
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WO
WIPO (PCT)
Prior art keywords
battery
battery unit
storage battery
flange
seal member
Prior art date
Application number
PCT/JP2015/081974
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English (en)
Japanese (ja)
Inventor
鈴木　亨
小林　由樹
Original Assignee
日本電気株式会社
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 日本電気株式会社 filed Critical 日本電気株式会社
Priority to JP2016559117A priority Critical patent/JPWO2016076417A1/ja
Publication of WO2016076417A1 publication Critical patent/WO2016076417A1/fr

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    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • 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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • H01M50/273—Lids or covers for the racks or secondary casings characterised by the material
    • H01M50/276—Inorganic material
    • 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 storage battery unit or the like in which a secondary battery is sealed and accommodated in a housing, in particular, in a case where both the battery fire prevention structure and the gas release function are compatible, and gas is released outside the housing.
  • the present invention also relates to a storage battery unit that does not cause problems with other devices and parts.
  • power storage devices have been used to charge storage batteries in the middle of the night when electricity charges are cheap and use the electricity during the day, or use the electricity charged during the day by solar power generation at night. It has become to.
  • power storage devices There are various types of power storage devices, from large ones installed in factories and offices to medium and small ones installed in stores, ordinary houses, and the like.
  • a lithium ion secondary battery etc. are mainly utilized as a storage battery (for example, refer patent document 1).
  • the power storage device may be used outdoors, it is required to prevent rainwater and dust from entering the device. Of course, it is important that fire prevention measures are taken so that problems such as smoke and fire do not occur.
  • a lithium ion secondary battery may contain a volatile solvent as a nonaqueous electrolytic solvent. Therefore, when gas is generated in the battery at the time of some abnormality, more specifically, when gas is released from the battery cell, it is also required that measures be taken.
  • the present invention has been made in view of the above-described problems, and the object thereof is a case where the fire prevention structure of the battery and the gas release function are compatible, and gas is released outside the housing. Is to provide a storage battery unit or the like that does not cause problems with other devices and parts.
  • a storage battery unit is as follows: A secondary battery, A housing for housing the secondary battery, comprising a first battery case and a second battery case, wherein a flange portion of the first battery case and a flange portion of the second battery case are fixed. A housing A seal member disposed between the flange portions; With In at least one of the flange portions, at least one groove communicating with the outside is formed at a position on the outer side in the extending direction of the flange portion with respect to the seal member.
  • the “battery cell” refers to an electrochemical cell that is a unit of a battery, such as a film-clad battery.
  • the “battery module” refers to a module that includes one or a plurality of battery cells and a case that houses the battery cells and outputs predetermined power.
  • Storage battery unit refers to a battery cell or battery module housed in a case (housing).
  • Power storage device refers to the entire device including at least one storage battery unit (battery unit) and its control circuit. It can also be called a power storage system.
  • a storage battery unit or the like that achieves both a fire prevention structure of a battery and a gas release function, and that does not cause problems in other devices and parts even when gas is released outside the housing. be able to.
  • FIG. 7A is a cross-sectional view taken along line aa in FIG. 7A
  • FIG. 7B is a cross-sectional view taken along line bb.
  • FIG. 7A It is sectional drawing in the cc line of FIG. 7A. It is a top view of the storage battery unit of a 2nd embodiment. It is sectional drawing which shows the specific example of an elastic fixing
  • the power storage device 1 of the present embodiment includes a storage battery unit 10, a junction box 200, a power conditioner 300 (PCS: Power Conditioner System), and a frame 80 that holds them. Yes.
  • the power storage device 1 may be configured as a stationary power storage system used in a store or a home.
  • the power storage device 1 can be used as a backup power source or auxiliary power at the time of a power failure or the like, and further to supply surplus power to a commercial power source.
  • household distributed power sources such as a solar cell system and a micro wind power generator, are provided, these household distributed power sources may also be connected to the power storage system.
  • the junction box 200 is a part having devices such as connection portions of various cables and a circuit breaker for wiring, and these are stored in the storage box 201. Although detailed illustration is omitted, the junction box 200 is connected to a cable connected to the system power, a cable connected to the home (an example) power system, and the like.
  • the power conditioner 300 includes a device that converts direct current and alternating current, and a device that controls charging / discharging operations of the power storage device. Specifically, the power conditioner 300 converts an alternating current from a commercial power source into a direct current in order to charge the storage battery (during charging), and a direct current from the storage battery when using the stored power. Is stored in the storage case 301. In addition, devices such as a battery management system (BMU: Battery Management Unit) which is a control circuit are also incorporated. The predetermined device in the power conditioner 300 and the predetermined device in the junction box 200 are electrically connected by a wiring (signal line, power line) (not shown).
  • a wiring signal line, power line
  • the battery management system has, for example, a function of controlling charging / discharging of each battery cell and a function of monitoring a voltage and temperature to manage a battery. Specifically, the battery management system may calculate the total voltage and the remaining capacity of each cell in real time and display them on a predetermined display device as necessary. Further, a warning for overdischarge and overcharge may be performed.
  • the frame 80 has a frame main body portion 85 for holding the device, and leg portions 89L and 89R provided at the lower portion thereof.
  • the material of the frame 80 is not particularly limited, but is made of metal, for example.
  • the junction box 200 and the power conditioner 300 are held in the upper stage of the frame main body 85, and the two storage battery units 10 are held in the lower stage. Since the storage battery unit 10 is a heavy object with a built-in battery as will be described later, disposing these in a low position is advantageous in that the center of gravity of the entire apparatus can be lowered.
  • the present invention is not limited to such an arrangement.
  • the legs 89L and 89R may be provided as parts that are fixed with respect to a predetermined installation position.
  • one or a plurality of bolt through holes (not shown) for passing through anchor bolts (not shown) provided at the installation positions of the power storage devices may be formed in the legs 89L and 89R.
  • the electrical storage apparatus 1 may be provided with the exterior cover which covers the whole apparatus.
  • the exterior cover may be attached to the frame 80 as an example.
  • the storage battery unit 10 includes a plurality of battery modules 20 and a sealed housing 50 that houses the battery modules 20.
  • the housing 50 includes a pair of battery cases 51 and 61. Since the inside of the housing 50 is hermetically sealed, even if the internal battery is ignited for some reason, the housing 50 can be self-digested. By adopting such a fire prevention structure, the safety of the power storage device 1 becomes very good.
  • the shape and size of the battery module 20 are not particularly limited, and the structure thereof may be arbitrary, but in the present embodiment, the battery module 20 is an example of a thin rectangular parallelepiped. It is configured. Although detailed illustration is omitted, the battery module 20 may be one in which one or more film-clad batteries (battery cells) are housed in the housing case 21.
  • the storage case 21 of the battery module 20 may be made of resin, may be made of metal, or may be made of metal in addition to the resin case. It may be like a cover made of metal.
  • the built-in film-clad battery battery cell
  • the film-clad battery has a battery element in which a positive electrode plate and a negative electrode plate are alternately laminated via a separator, and the battery element is enclosed in an outer film such as a laminate film together with an electrolyte. Good.
  • the voltage of one film-covered battery is not limited in any way, but may be in the range of 3.0V to 4.5V, for example.
  • the number of battery cells used and the number of battery modules 20 may be appropriately set according to product specifications and the like. As a specific example, four battery-clad batteries are stacked in one battery module 20. It may be built in the state.
  • the battery modules 20 configured as described above may be stacked in the thickness direction to form an assembly (assembled battery) as shown in FIG. Specifically, a plurality of battery modules 20 are stacked (eight in this example), side plates 31 and 31 are arranged on both sides, and the whole is fixed with fixing bolts 33 and nuts (not shown).
  • the fixing bolts 33 may be arranged at the four corners of the battery module 20.
  • the fixing bolt 33 has a length that penetrates all the battery modules 20, and the entire module 20 and the side plate 31 are fixed by tightening a nut (not shown) at the tip side.
  • the shape of the side plate 31 can be variously changed and may be a simple plate shape as schematically illustrated in FIG. 2, but is not limited thereto and may be an arbitrary shape.
  • an additional intermediate plate (not shown) may be provided between the stacked battery modules 20. The assembly thus assembled is fixed at a predetermined position of the housing 50.
  • any method may be used for fixing the assembly of the battery module 20 and the battery cover.
  • the battery case is provided via fixing stays 25 and 26. It is good also as a structure attached to 61.
  • FIG. The stays 25 and 26 are formed by bending a sheet metal member as an example, and are fixed to the battery case 61 by welding.
  • the assembly of the battery module 20 may be positioned and arranged with respect to the stays 25 and 26, and the assembly may be fixed by screwing at a predetermined location.
  • the shape of the stays 25 and 25 can be changed as appropriate in consideration of the shape and size of the internal assembly, the position where the screws are fixed, and the like.
  • the battery element may be a laminated type composed of a positive electrode side active electrode and a negative electrode side active electrode laminated via a separator.
  • the power generation element includes a belt-like positive electrode side active electrode and a negative electrode side active electrode that are stacked via a separator, wound, and then compressed into a flat shape to compress the positive electrode side active electrode and the negative electrode side active electrode. And a wound type having a structure in which and are alternately stacked.
  • Battery elements in a typical lithium ion secondary battery are: a positive electrode plate in which a positive electrode active material is applied on both sides of an aluminum foil, and a negative electrode plate in which a carbon material capable of doping and undoping lithium is applied on both sides of a copper foil. Are stacked via a separator.
  • As the positive electrode active material lithium / manganese composite oxide, lithium cobaltate, or the like is used.
  • the battery element is enclosed in the film outer package together with the electrolytic solution.
  • ester solvents such as propylene carbonate (PC), ethylene carbonate (EC), dimethyl carbonate (DMC), and methyl ethyl carbonate
  • examples of the volatile nonaqueous electrolytic solvent having combustibility include carbonate solvents such as cyclic carbonates such as diethyl carbonate (DEC).
  • examples of the battery element include those of other types of chemical batteries such as a nickel metal hydride battery, a nickel cadmium battery, a lithium metal primary battery or secondary battery, and a lithium polymer battery.
  • the housing 50 includes a pair of battery cases 51 and 61 as shown in FIG.
  • the battery covers 51 and 61 may have any shape as long as they can form a sealed space, and may not necessarily have the same or symmetric shape, but in the present embodiment, the battery covers 51 and 61 have the same or symmetric shape.
  • a typical configuration will be described as an example.
  • the battery cover 51 has a cup portion 58 and a flange portion 53 provided at the periphery of the opening.
  • the battery cover 61 is the same, and has a cup portion 68 and a flange portion 63.
  • the battery covers 51 and 61 are shaped like a bathtub as a whole.
  • the battery covers 51 and 61 are preferably made of a material having a high melting temperature so that the battery itself does not spread even if the internal battery becomes hot due to thermal runaway.
  • the internal pressure of the sealed housing 50 increases (the gas release mechanism will be described later), but the battery cover itself is not damaged before the gas release mechanism is activated. It is configured to have sufficient strength.
  • the material of the battery covers 51 and 61 may be a metal (for example, steel, stainless steel, copper, brass, aluminum, or those coated or plated). A rolled steel plate, a stainless steel plate, etc. can be used. The thickness of the material may be in the range of 1.0 mm to 3.0 mm, for example. If the material is within this range, a highly reliable fire-proof structure can be realized without significantly degrading the workability of the battery cover.
  • the battery covers 51 and 61 may be manufactured by any method, but for example, a single plate material may be integrally formed by pressing (in one example, deep drawing). Alternatively, it may be formed by joining by welding. When formed by deep drawing, the ridge line portion of the cup portion and the connection portion between the cup portion and the flange portion can be formed seamlessly, which is preferable from the viewpoint of sealing performance and high strength. Moreover, since operations such as welding are unnecessary, it is preferable from the viewpoint of manufacturing cost.
  • the depth of the cup portions 58 and 68 is set to such a depth that both the cup portions 58 and 68 cooperate to form an internal space in which the battery module 20 can be stored. According to the configuration in which the cup portions 58 and 68 are formed in both the battery covers 51 and 61 as in the present embodiment, it is not necessary to form a deep cup portion in only one battery cover, and it is manufactured by pressing. Is preferable in that it is easy to perform.
  • FIG. 2 the ridge line portions of the cup portions 58 and 68 are schematically shown in a squared state, but it goes without saying that when the battery cover is manufactured by pressing or the like, it is easy to manufacture. It may be formed in a gentle curved shape (R shape).
  • FIG. 2 and the like are schematic diagrams for explaining the basic configuration to the last. For example, whether the outer peripheral portion of the flange portion extends flat (see FIG. 2, FIG. 3, etc.), or is curved to form a rising wall (see FIG. 7B, etc.) is not an essential difference. Note that any form may be used.
  • the flange portion 63 of the battery cover 61 is formed with a concave surface portion 65 formed on the radially inner side and a convex surface portion 64 formed on the outer side so as to be one step higher. ing. As shown in FIG. 4, the concave surface portion 65 and the convex surface portion 64 are formed in a substantially rectangular ring shape surrounding the cup portion 68.
  • the annular concave surface portion 65 is provided so as to form a surface that extends substantially horizontally (in a direction substantially perpendicular to the depth direction of the cup portion) from the upper end of the opening of the cup portion 68. ing.
  • a plurality of gas discharge grooves 65 a are formed on one side of the flange portion 63.
  • the gas discharge groove 65a is formed to communicate the concave surface portion 65 and the outside of the case.
  • the number and position of the gas discharge grooves 65a can be variously changed. In this example, three gas discharge grooves 65a are formed.
  • the gas discharge grooves 65a may be formed in parallel to each other, or may be formed in a substantially radial shape.
  • the distance (pitch) between the gas discharge grooves 65a may be equal or different.
  • the gas discharge groove 65a is formed on only one side, but may be formed on two or more sides.
  • the concave surface portion 65 and the gas discharge groove 65a may be formed to have the same depth (that is, the surface of the concave surface portion 65 and the bottom surface of the discharge groove 65a are the same surface). As another form, it may be formed with different depths (for example, the gas discharge groove 65a is shallower).
  • the stepped portion of the concave surface portion 65 and the outer peripheral flange portion 64 of the concave portion 65, the portion corresponding to the side wall of the gas discharge groove 65a, and the like are depicted as square shapes. In the case where such a structure portion is formed in 63, it may actually be formed in an inclined surface or curved surface as shown in FIGS. 7B and 7C.
  • the concave surface portion 65, the convex surface portion 64, and the gas discharge groove 65a as described above are similarly formed in the other battery cover 51 (see the concave surface portion 55, the convex surface portion 54, and the gas discharge groove 55a in FIG. 7B). .
  • the flange portions 53 and 63 formed in this manner are overlapped with each other so that the gas discharge extending between the annular inner space 75 and one side thereof outward as schematically shown in FIG. A hole 75a is formed.
  • a seal member R1 is disposed in the internal space 75.
  • FIG. 7A is a plan view of the state in which the battery cases are fixed as viewed from above.
  • 7A is a cross-sectional view taken along the line aa in FIG. 7A
  • FIG. 7B is a cross-sectional view taken along the line bb
  • FIG. 7C is a cross-sectional view taken along the line cc of FIG. 7A.
  • the flange portions 53 and 63 of the battery case are connected by a plurality of fixing portions f1, and the flange portions 53 and 63 are fixed.
  • the fixing means include screws, bolts and nuts, rivets, and welding.
  • each of the fixing portions f1 may be rigidly fixed (“rigid fixation” means that an elastic body as described in the second embodiment is interposed. This means that the flange portions 53 and 63 are fixed so as not to be separated from each other.
  • screws, bolts, and the like are not limited in any way.
  • an opening is formed in the flange portion 53 and a female screw portion is formed in the flange portion 63.
  • the connection may be performed by tightening the screw 91 from the part 53 side. Or you may connect a flange part with a volt
  • the short sides of the flange portions 53 and 63 where the gas discharge holes 75a are formed are connected by two fixing portions f1, and the other sides are connected by three or more locations. ing.
  • the pitch d1 between the fixed portions f1 on both sides of the gas discharge hole 75a is formed wider than any other pitch.
  • the pitches d2 and d3 between the other fixed parts are only required to be smaller than the pitch d1, and the pitches d2 and d3 may be the same or different.
  • the pitch d1 between the fixed portions is preferably in the range of, for example, 40% to 70% with respect to the length of the side on which the fixed portion is provided. . If the pitch d1 is too long, the deformation of the flange portion due to the reaction force of the seal member may not be corrected, and if it is too short, the assembly process may be complicated.
  • the sealing member R1 basically any material and shape may be used as long as the sealing between the battery cases can be performed in an airtight and watertight manner.
  • the seal member R1 has a closed annular shape, and specifically, may have a shape corresponding to the planar shape (that is, a substantially square shape) of the concave surface portion 65 of the flange portion.
  • a general seal member for example, an O-ring
  • the cross-sectional shape of the seal member R1 may be any shape such as a circle, an ellipse, a substantially semicircle, a rectangle, and a polygon. Another example of the seal member will be described later as a third embodiment with reference to other drawings.
  • the storage battery unit 10 of the present embodiment is kept in a sealed state by a seal member in a normal state, but when gas is generated, the pitch d1 on the gas discharge hole 75a side is formed most widely, On the basis of the following principle, gas is discharged from between the fixed portions f1 having a wide pitch.
  • the storage battery unit 10 is oriented in such a direction that the side on which the gas discharge hole 75 a is formed is downward. May be attached to the frame 80. According to this, since the internal gas (high temperature, high pressure) is released toward the ground plane, the gas is blown to other equipment and is not damaged or damaged, and it is safe. .
  • the present invention can be applied to any secondary battery that can generate gas when it is abnormal.
  • the battery cover has been described as an example having a square flange portion, it may have a polygonal shape other than that, or a contour shape in which several sides and curves are combined. In such a case, as one form of the invention “increase the pitch between the fixed portions”, the pitch (d1) of the fixed portions on a predetermined one side of the flange portion may be provided wider than the others.
  • the flange portion can be deformed most freely between the fixed portions, and when the internal pressure rises, the flange portion can be deformed to release the gas from the portion.
  • (1c) With respect to the case of the battery module 20 and the film-clad battery inside the battery module 20, a structure portion that is preferentially broken to release gas when gas is generated may be formed.
  • the gas is released from between the fixed portions having a wide pitch by changing the pitch of the fixed portions f1, but other modes for regulating the gas discharge direction are as follows. It may be anything.
  • a part of the plurality of fixing parts of the flange parts 53 and 63 is a rigid fixing part f1, and the fixing part on the side where the gas is to be released is opened when a predetermined pressure or more is applied. It is an elastic fixing part f1 ′ (see FIG. 8).
  • the “elastic fixing part f1 ′” includes a screw 91 and a spring 92, and the spring 92 is compressed in a tightened state of the screw 91 (specifically, the screw A spring is attached to the shaft portion of the screw and the spring is compressed between the screw head and the flange portion), and one flange portion 53 is pressed against the other flange portion 63 with a predetermined urging force.
  • the position where such a fixing portion f1 ′ is used is the side on the side where the gas discharge hole 75a is formed and the side on the side where the gas discharge hole 75a is formed among the long sides. It is good also as one or more of the side close to.
  • the number of the fixed portions f1 and f1 ′ per long side is three as an example, but this number can be changed as appropriate.
  • All the long sides may be rigid fixing portions f1, and only the side on the side where the gas discharge holes 75a are formed may be such fixing portions f1 ′.
  • the flange portions can be pressed with sufficient force to ensure airtightness and watertightness, while (ii) internal pressure Is increased to a predetermined reference value, the gas discharge hole 75a side is opened, and the gas can be discharged through the gas discharge hole 75a.
  • the opening amount is within a range of about 0.5 mm to 5.0 mm, for example, or It is preferably within a range of about 1.0 mm to 3.0 mm. This is because if the opening amount is too small, the internal gas cannot be discharged satisfactorily, and if it is excessively large, there is a possibility that the fixing portion f1 ′ becomes large and complicated.
  • the screw 91 interposing the spring 92 is used, and a configuration in which a part on the gas discharge hole side of the battery case is connected by such a fixing portion f1 ′. Therefore, when the internal pressure rises above a predetermined level, the gas discharge hole side is preferentially opened, and the gas can be discharged to the outside from there.
  • the arrangement pitch of the fixed portions is the same as that in FIG. 4 (connection by rigid fixed portions).
  • the pitch of the fixed portions is not limited to this, for example, is constant over the entire circumference of the flange (or left and right sides
  • the elastic fixing part f1 ′ as described above may be used only for a part of the side where the gas is to be released.
  • the gas discharge hole 75a is preferably provided, but may be omitted.
  • the spring 92 has been exemplified above, any elastic body (biasing means) can be used as long as one flange portion can be biased toward the other.
  • FIG. 10 is a perspective view of a seal member used in the present embodiment.
  • FIG. 11 is a plan view of the battery case in which the seal member is disposed as viewed from above the opening of the cup portion.
  • FIG. 12 is a cross-sectional perspective view showing a state in which the seal portion is interposed between the flange portions.
  • any sealing member may be used as long as it can seal between the flange portions 53 and 63 of the battery cover. Therefore, for example, a general O-ring having a circular cross-sectional shape can also be used.
  • a groove for example, a recess having a semicircular cross section
  • the O-ring may be fitted into the groove.
  • a seal member 110 as shown in FIG. 10 is used.
  • the seal member 110 is disposed on the concave surface portion 65 of the flange portion 63, and the overall shape is formed in a substantially quadrangular ring like the concave surface portion 65.
  • the seal member 110 includes a thick portion 111 sandwiched between the flange portions 53 and 63, a plurality of pins 115 for positioning the seal member 110, and a thickness. And an extending portion 113 extending inward from the portion 111.
  • the cross-sectional shape of the thick portion 111 is not particularly limited, and may be, for example, a circle, a semicircle, an ellipse, a semielliptic, a triangle, a quadrangle, a polygon, or a combination thereof.
  • the thickness of the thick portion 111 is formed to be thicker than the thickness t75 between the recesses (see FIG. 7B) (the compressed state is shown in FIG. 12).
  • the thick portion 111 has a circular cross section, and one top side (the upper part in the figure) protruding in an arc shape is in close contact with the flange part of one battery case, and the other top side (the lower part in the figure) ) Is in close contact with the flange portion of another battery case.
  • the pin 115 is formed in a columnar shape, and is provided so as to be on the outer side (the right side in the figure in FIG. 12) of the thick part 111 through the connection part 114.
  • the pin 115 may be formed in a vertical direction substantially orthogonal to the radial direction of the entire seal member 110 when the radial direction is the horizontal direction. In other words, the pin 115 may be formed in an orientation that is substantially perpendicular to the flange portion 63.
  • the pin 115 is inserted into a hole 65 h (see FIG. 11) formed in the flange portion 63 in advance to position the seal member 110 at a predetermined position of the flange portion 63.
  • the pin 115 is also preferably formed in a tapered shape (for example, chamfered or rounded) so that the pin 115 can be easily inserted into the hole 65h.
  • the inner diameter of the hole 65h may be the same as or slightly larger than the diameter of the pin 115. All the holes 65 h are formed in the region of the concave surface portion 65.
  • the length of the pin 115 can be appropriately changed, for example, it is also preferable in one embodiment that the length of the protrusion from the flange portion 63 when inserted is in the range of 5 to 15 mm. Even if the pin is relatively short and the amount of protrusion is, for example, less than a few millimeters, the positioning effect due to the provision of the pin 115 can be obtained in the same manner, but a relatively long protrusion as described above. In the case of a quantity, there is an advantage that it is possible to visually confirm whether or not the seal member is normally attached during work. In addition, if the length of the pin is too short, it is difficult to insert the pin into the hole.
  • the pin 115 is described, but any shape may be used as long as it can be attached to the battery cover.
  • it may be configured as a columnar or plate-like protrusion, and a part of the protrusion may be inserted into a hole or an opening formed in the battery cover for positioning.
  • the cross-sectional shape can be any shape, and may be a circle, a semicircle, an ellipse, a semi-elliptical, a triangle, a quadrangle, a polygon, or a combination thereof.
  • the pins 115 are formed at three locations on the short side, and the pins 115 are formed at four locations on the long side. As shown in FIG. 11, a plurality of holes 65 h are formed in the flange portion 63 of the battery cover 61 so as to correspond to the pins 115.
  • the pins 115 do not necessarily have to be formed on all sides, and may be provided at only one place on the seal member 110 in some cases.
  • one or more pins 115 may be provided on at least two sides so that the seal member 110 can be positioned more easily.
  • the pins 115 may be provided only on two opposite sides.
  • the extending portion 113 is not necessarily essential, but in the configuration in which the seal member 110 is disposed on the flat concave surface portion 65 as in the present embodiment, the seal member 110 may be stably formed on the concave surface portion 65 in some cases. There is also concern that it will be difficult to place. Therefore, in the present embodiment, the extending portion 113 extends from the thick portion 111 toward the inside of the case.
  • the extension portion 113 is formed thinner than the thick portion 111 and thinner than the thickness t75 between the recesses.
  • the extending portion 113 is formed in a flat plate shape having a uniform thickness, and is formed over the entire circumference of the seal member 111. As shown in FIG. 10, two portions 113 a and 113 a that are partially larger in protruding amount may be formed on a part of the extending portion 113.
  • extension part 113 does not necessarily need to be formed over the entire circumference of the seal member 110, and may be formed only partially or intermittently.
  • the thickness of the extension portion 113 does not need to be constant.
  • the extension portion 113 includes a plurality of portions having different thicknesses (for example, the thickness is gradually or stepwise on the base end side and the tip end side). It may be different, for example, a tapered shape with a tapered tip.
  • the pin 115 is inserted into the hole 65h of the battery case at the time of assembly, so that the seal member 110 is attached to the battery case. Therefore, it is possible to perform the assembling work satisfactorily without the seal member 110 being displaced or dropping from the predetermined position in the subsequent work.
  • the pin 115 can be visually confirmed from the back side of the flange portion if it is correctly inserted, it is easy to confirm whether or not the seal member 110 is normally attached.
  • the pin 115 is disposed on the inner side of the thick part 111 that provides a sealing action, the hole 65h through which the pin 115 is passed is also formed on the inner side of the thick part 111, and as a result, When the pressure in the case rises, gas may leak from the hole 65h. On the other hand, when the pin 115 is arrange
  • the extending portion 113 is formed even when the seal member 110 is placed on the planar concave surface portion 65.
  • the seal member 110 can be efficiently installed.
  • the invention according to this embodiment is not limited to the above, and various modifications can be made.
  • the extending portion 113 extends from the thick portion 111 toward the inside of the case.
  • the present invention is not limited thereto, and the extending portion 113 extends from the thick portion 111 toward the outside of the case.
  • the structure which extends may be sufficient.
  • the operational effect by providing the extending portion 113 can be obtained in the same manner as described above.
  • the pins 115 may all have the same length, but may have different lengths.
  • the length of the pin 115 on one side and the other side of the seal member 110 (for example, the right side and the left side, or the upper mold and the lower side). May be changed. Thereby, it is possible to check whether the mounting direction of the seal member 110 is correct by looking at the length of the pin 115.
  • the “groove” may be, for example, a gas discharge groove that communicates the inside and the outside of the housing.
  • the “secondary battery” may be a single battery cell (for example, a film-clad battery) or may be one in which it is housed in a predetermined case.
  • a groove capable of releasing gas is formed in the battery case constituting the housing (a gas discharge passage is formed by the groove), thereby realizing a gas discharge function.
  • the flange portion in which the gas discharge groove is formed has a concave surface portion (65) in which the seal member is disposed on the inner side in the extending direction of the flange portion than the gas discharge groove,
  • the gas discharge groove (65a) extends outward from the outer peripheral portion of the concave surface portion (65).
  • Both the flange portions (53, 63) are formed with the concave surface portion (65) and the gas discharge groove (65a), respectively.
  • the concave portions (65) facing each other form an annular inner space (75) for disposing the seal member, and the gas discharge grooves (65a) facing each other form gas discharge holes (75a). It is formed. According to such a configuration, there is an advantage that it is not necessary to form a deep groove in one flange portion.
  • Two or more gas discharge grooves (65a) are formed.
  • the flange portion is substantially quadrangular (including a curved corner portion), and the gas discharge groove is formed only on one side of the flange portion.
  • each of the first and second battery cases is a metal case.
  • steel, stainless steel, copper, brass, aluminum, or those coated or plated can be used.
  • the gas that can be generated at the time of thermal runaway of the battery cell may be high pressure and high temperature (for example, about 500 ° C.). It is advantageous in that the sealed state can be maintained.
  • the secondary battery (20) is one in which one or more film-clad batteries are stored in a storage case.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Battery Mounting, Suspending (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

Cette invention concerne une unité de batterie de stockage (10), comprenant : une batterie rechargeable (20); un boîtier (50) qui accueille la batterie rechargeable et comprend un premier boîtier de batterie (51) et un second boîtier de batterie (61), une bride (53) du premier boîtier de batterie et une bride (63) du second boîtier de batterie étant fixées l'un à l'autre; et un élément d'étanchéité (110) disposé entre les brides, au moins l'une des brides (53, 63) présentant une rainure (65a) formée dans une position plus vers l'extérieur que l'élément d'étanchéité dans le sens d'extension de la bride.
PCT/JP2015/081974 2014-11-14 2015-11-13 Unité de batterie de stockage et dispositif de stockage d'énergie WO2016076417A1 (fr)

Priority Applications (1)

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JP2016559117A JPWO2016076417A1 (ja) 2014-11-14 2015-11-13 蓄電池ユニットおよび蓄電装置

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Application Number Priority Date Filing Date Title
JP2014-232230 2014-11-14
JP2014232230 2014-11-14

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WO2016076417A1 true WO2016076417A1 (fr) 2016-05-19

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180007892A (ko) * 2016-07-14 2018-01-24 주식회사 엘케이 식품용 호이스트 장치
WO2022070853A1 (fr) 2020-09-30 2022-04-07 パナソニックＩｐマネジメント株式会社 Bloc-batterie
WO2023012538A1 (fr) * 2021-08-02 2023-02-09 Arcelormittal Couvercle supérieur gi + oc

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008218239A (ja) * 2007-03-05 2008-09-18 Toyota Motor Corp 燃料電池ケース
JP2012089532A (ja) * 2012-02-06 2012-05-10 Dainippon Printing Co Ltd リチウム電池の外装体
JP2012097896A (ja) * 2010-10-08 2012-05-24 Primearth Ev Energy Co Ltd ガスケットを用いたシール構造体

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008218239A (ja) * 2007-03-05 2008-09-18 Toyota Motor Corp 燃料電池ケース
JP2012097896A (ja) * 2010-10-08 2012-05-24 Primearth Ev Energy Co Ltd ガスケットを用いたシール構造体
JP2012089532A (ja) * 2012-02-06 2012-05-10 Dainippon Printing Co Ltd リチウム電池の外装体

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180007892A (ko) * 2016-07-14 2018-01-24 주식회사 엘케이 식품용 호이스트 장치
KR101891327B1 (ko) * 2016-07-14 2018-08-23 주식회사 엘케이 식품용 호이스트 장치
WO2022070853A1 (fr) 2020-09-30 2022-04-07 パナソニックＩｐマネジメント株式会社 Bloc-batterie
WO2023012538A1 (fr) * 2021-08-02 2023-02-09 Arcelormittal Couvercle supérieur gi + oc
WO2023012500A1 (fr) * 2021-08-02 2023-02-09 Arcelormittal Feuille d'acier pour couvercle supérieur de bloc-batterie et son procédé de fabrication

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