WO2022024893A1 - 蓄電モジュール - Google Patents
蓄電モジュール Download PDFInfo
- Publication number
- WO2022024893A1 WO2022024893A1 PCT/JP2021/027247 JP2021027247W WO2022024893A1 WO 2022024893 A1 WO2022024893 A1 WO 2022024893A1 JP 2021027247 W JP2021027247 W JP 2021027247W WO 2022024893 A1 WO2022024893 A1 WO 2022024893A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power storage
- storage module
- storage device
- terminal
- negative electrode
- Prior art date
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- 238000003860 storage Methods 0.000 title claims abstract description 154
- 230000001105 regulatory effect Effects 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 29
- 230000002093 peripheral effect Effects 0.000 claims description 23
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- 239000003792 electrolyte Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 description 7
- 239000011888 foil Substances 0.000 description 5
- 238000005304 joining Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
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- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
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- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
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- H—ELECTRICITY
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- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/74—Terminals, e.g. extensions of current collectors
- H01G11/76—Terminals, e.g. extensions of current collectors specially adapted for integration in multiple or stacked hybrid or EDL capacitors
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- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/78—Cases; Housings; Encapsulations; Mountings
- H01G11/82—Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
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- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/10—Housing; Encapsulation
- H01G2/106—Fixing the capacitor in a housing
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- 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
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
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- 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
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
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- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells having curved cross-section, e.g. round or elliptic
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- H01M50/10—Primary casings; Jackets or wrappings
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- H01M50/186—Sealing members characterised by the disposition of the sealing members
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
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- 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
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
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- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
- H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
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- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
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- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
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- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
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- H01M50/50—Current conducting connections for cells or batteries
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- H01M50/552—Terminals characterised by their shape
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
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- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/74—Terminals, e.g. extensions of current collectors
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- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
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- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/78—Cases; Housings; Encapsulations; Mountings
- H01G11/80—Gaskets; Sealings
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- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/38—Multiple capacitors, i.e. structural combinations of fixed capacitors
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- 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
- This disclosure relates to a power storage module.
- a power storage module is known as a power source provided with a plurality of power storage devices.
- the power storage module disclosed in Patent Document 1 includes a plurality of cylindrical batteries.
- the sealing body is configured as a positive electrode terminal and the outer can is configured as a negative electrode terminal, and the negative electrode lead is bonded to the shoulder portion (crimped open end portion) of the outer can.
- An object of the present disclosure is to provide a power storage module capable of securing a bonding region between a negative electrode and a negative electrode lead of a power storage device while ensuring an insulation distance between the positive electrode and the negative electrode lead of the power storage device.
- the power storage module includes at least one cylindrical power storage device and a holder for holding one side of the power storage device, and a first terminal is attached to one end of the power storage device. And a second terminal is arranged, the second terminal is arranged outside the first terminal in the radial direction of the power storage device, and further includes a lead connected to the second terminal from the outside in the radial direction.
- the holder has a regulatory section located inside at least a portion of the leads in the radial direction.
- contact between the positive electrode lead and the negative electrode lead of the power storage device can be suppressed.
- FIG. 7 is a cross-sectional view taken along the line CC of FIG. It is a top view which shows the negative electrode lead of the power storage module which is another example of Embodiment. It is a perspective view of FIG.
- FIG. 1 is a side sectional view showing a power storage module 10.
- the side of the power storage module 10 and the power storage device 20 where the upper holder 30 as a holder holds the power storage device 20 will be described as the upper side in the vertical direction.
- the upper holder 30 side may be the lower side of the power storage module 10.
- the power storage module 10 is mainly used as a power source for power.
- the power storage module 10 is used as a power source for electric devices driven by motors such as electric vehicles, electric tools, electric assisted bicycles, electric bikes, electric wheelchairs, electric three-wheeled vehicles, and electric carts.
- motors such as electric vehicles, electric tools, electric assisted bicycles, electric bikes, electric wheelchairs, electric three-wheeled vehicles, and electric carts.
- the use of the power storage module 10 is not limited, and it may be used as a power source for various electric devices used indoors and outdoors, such as cleaners, radios, lighting devices, digital cameras, and video cameras.
- the power storage module 10 holds a plurality of cylindrical power storage devices 20, an upper holder 30 as a holder for holding the upper end side of the plurality of power storage devices 20, and a lower end side of the plurality of power storage devices 20, respectively.
- a lower holder 40 (not shown) in which a positive electrode lead connected to a first terminal (positive electrode terminal) of the power storage device 20 is formed, and a second terminal (negative electrode terminal) of the power storage device 20.
- a second current collector (not shown) on which the negative electrode lead 50 (see FIG. 2) is formed is provided as the lead connected to the). Details of the upper holder 30 and the negative electrode lead 50 will be described later.
- FIG. 2 is a detailed view of part A in FIG.
- each member will be described according to the radial direction and the circumferential direction of the cylindrical shape of the power storage device 20.
- the power storage device 20 a cylindrical lithium ion secondary battery is used.
- the power storage device 20 is not limited to the lithium ion secondary battery, and may be a nickel hydrogen battery, a capacitor, or the like.
- a positive electrode terminal as a first terminal and a negative electrode terminal as a second terminal are arranged at the upper end portion, and the negative electrode terminal is arranged radially outside the positive electrode terminal. More specifically, the positive electrode terminal is configured on the top surface of the sealing body 26 described later. Further, the negative electrode terminal is configured at the crimped open end portion (hereinafter, shoulder portion 25C) of the outer can 25 described later.
- the power storage device 20 includes, for example, an electrode group 24 in which a band-shaped positive electrode 21 and a band-shaped negative electrode 22 are wound via a band-shaped separator 23, and a cylindrical outer can 25 containing the electrode group 24 together with an electrolytic solution.
- the sealing body 26 that seals the opening of the outer can 25 in an insulated state
- the foil-shaped positive electrode tab 27 that electrically connects the positive electrode 21 and the sealing body 26, and the negative electrode 22 and the outer can 25 are electrically connected. It has a negative electrode tab (not shown) to connect to.
- An insulating gasket 28 is arranged between the outer periphery of the sealing body 26 and the inner peripheral surface of the opening of the outer can 25.
- An annular groove 25A is formed on the opening side of the outer peripheral surface of the outer can 25.
- an annular convex portion 25B is formed on the inner peripheral surface of the corresponding outer can 25.
- the gasket 28 and the sealing body 26 are arranged on the annular convex portion 25B in the outer can 25.
- the shoulder portion 25C of the outer can 25 is crimped so as to fall toward the inside of the outer can 25 with the gasket 28 arranged on the inner peripheral side.
- the opening of the outer can 25 is sealed by the sealing body 26 being vertically sandwiched by the crimped shoulder portion 25C and the convex portion 25B via the gasket 28.
- the shoulder portion 25C does not have to have the above configuration.
- the sealing body 26 has a terminal plate at the center of the sealing body 26 and a conductive joint portion arranged on the outermost periphery of the sealing body 26 in a state of being insulated from the terminal plate, and the opening end portion and this joint portion are welded together. By doing so, the opening of the outer can 25 may be sealed. At this time, the negative electrode lead 50 may be connected to the top surface of the joint portion.
- the sealing body 26 may be provided with a current cutoff mechanism (CID) or an exhaust valve that bursts when the inside of the outer can 25 reaches a predetermined pressure or higher.
- a current cutoff mechanism CID
- an insulating plate 29 for insulating the electrode group 24 and the outer can 25 may be provided between the electrode group 24 and the convex portion 25B.
- the positive electrode tab 27 may extend through a through hole formed in the insulating plate 29.
- an insulating plate for insulating the electrode group 24 and the outer can 25 may be provided between the electrode group 24 and the bottom of the outer can 25.
- the negative electrode tab may pass through a through hole formed in the insulating plate or may extend by bypassing the insulating plate.
- the positive electrode terminal is configured on the top surface of the sealing body 26, and the positive electrode lead connected to the positive electrode current collector foil is joined.
- the negative electrode terminal is configured on the crimped shoulder portion 25C of the outer can 25, and the negative electrode tab connected to the negative electrode current collecting foil is joined to the bottom portion of the outer can 25.
- the negative electrode lead 50 is joined to the shoulder portion 25C of the outer can 25 from the radial outside of the power storage device 20.
- FIG. 3 is a plan view of the upper holder 30 as viewed from below.
- FIG. 4 is a detailed view (plan view) showing an excerpt of part B of FIG.
- FIG. 5 is a perspective view of the portion B of FIG. 4 as viewed from below.
- FIG. 6 is a perspective view of the accommodating portion 31 of the upper holder 30 as viewed from above.
- FIG. 7 is a side sectional view of the upper holder 30.
- the upper holder 30 is a member that holds the upper end side of the plurality of power storage devices 20.
- the upper holder 30 is formed of a thermoplastic resin.
- the thermoplastic resin is roughly classified into general-purpose plastics and engineering plastics, and polyethylene, polypropylene, polyamide, ABS and the like are used.
- the first current collector and the second current collector may be arranged side by side in a direction in which the top surface of the upper holder 30 expands.
- the first current collector has a plurality of positive electrode leads and electrically connects a plurality of power storage devices 20, and the second current collector is connected to the negative electrode terminals of the plurality of power storage devices 20 and the plurality of power storage devices.
- the device 20 may be electrically connected. Further, the first current collector and the second current collector may be laminated with each other via an insulating plate.
- a plurality of accommodating portions 31 accommodating the upper end side of each power storage device 20 are formed on the bottom surface of the upper holder 30. By fitting the upper end side of the power storage device 20 into the accommodating portion 31, the upper end side of the power storage device 20 is held by the upper holder 30.
- the accommodating portion 31 includes a ceiling portion 31A having a bottom surface facing the upper end surface of the power storage device 20 and a wall portion 31B having an inner peripheral surface facing the side peripheral surface of the power storage device 20. It is formed on the bottom surface of the upper holder 30 as a concave portion.
- a notch 33 to be exposed and a regulation portion 34 located inside at least a part of the negative electrode lead 50 in the radial direction of the power storage device 20 are formed.
- the opening 32 is a portion in which the ceiling portion 31A of the accommodating portion 31 is opened in a circular shape.
- the diameter of the opening 32 is formed to be smaller than the inner diameter of the wall portion 31B. According to the opening 32, the top surface of the sealing body 26 of the power storage device 20 is exposed from the upper surface of the upper holder 30. Therefore, the top surface of the sealing body 26 and the positive electrode lead can be joined via the opening 32. Further, the bottom portion of the ceiling portion 31A may be in contact with the power storage device 20.
- the cutout portion 33 is a portion formed by cutting out a part of the edge portion of the opening portion 32. According to the notch 33, a part of the shoulder portion 25C of the outer can 25 of the power storage device 20 can be exposed from the upper surface of the upper holder 30. It is preferable that the edge portion of the notch 33 on the upper surface of the upper holder 30 is formed with an inclined portion that is lowered toward the inside in the radial direction of the power storage device 20. As a result, the stress applied to the negative electrode lead when the negative electrode lead 50 is bent and comes into contact with the shoulder portion 25C can be reduced.
- the top surface of the regulating portion 34 may be located at a position lower than the top surface of the region where the notch portion 33 is formed in the upper holder 30. With this configuration, the negative electrode lead 50 can be more easily accommodated in the notch 33.
- the regulation unit 34 is a portion located inside at least a part of the negative electrode lead 50 in the radial direction of the power storage device 20.
- the regulating unit 34 is a portion that regulates the negative electrode lead 50 so as not to move inward from the predetermined position in the radial direction.
- the predetermined position is preferably the radial inner end position (open end position of the outer can 25) of the shoulder portion 25C of the outer can 25 of the power storage device 20.
- the regulation portion 34 due to the regulation portion 34, not all of the negative electrode leads 50 need to be located on the shoulder portion 25C (outside the top surface of the sealing body). A part of the negative electrode lead 50 may overlap without contacting the top surface of the sealing body.
- the negative electrode lead 50 includes a configuration in which the negative electrode lead 50 is housed in the window formed by the regulation portion 34 and the notch portion 33.
- the regulating portion 34 is located inside the notch 33 in the radial direction, and is bridged over the surfaces of both sides of the notch 33 in the circumferential direction (the portion connected to both ends of the notch 33 in the ceiling portion 31A). It is formed.
- the negative electrode lead 50 may be joined to the shoulder portion 25C of the outer can 25 in a state where the outer surface 34A of the regulating portion 34 and the negative electrode lead 50 are in contact with each other or slightly separated from each other in the radial direction of the power storage device 20.
- the regulation unit 34 by restricting the negative electrode lead 50 to be located outside a predetermined position in the radial direction, the insulation distance between the top surface (positive electrode terminal) of the sealing body 26 of the power storage device 20 and the negative electrode lead 50. Can be secured. Further, when a conductive foreign substance enters from the outside of the upper holder 30, the risk of a short circuit between the top surface of the sealing body 26 and the negative electrode lead 50 due to the foreign substance or the like can be reduced.
- the regulation unit 34 since the insulation distance from the top surface of the sealing body 26 can be secured, it is necessary to reduce the radial length of the negative electrode lead 50 in consideration of the insulation distance from the top surface of the sealing body 26. Therefore, the radial length of the negative electrode lead 50 can be sufficiently increased. As a result, it is possible to secure a joint region between the negative electrode lead 50 and the shoulder portion 25C (negative electrode terminal) of the outer can 25 of the power storage device 20.
- the regulating portion 34 has an inclined portion 34B formed from the upper surface toward the outer surface 34A and falling in the radial direction of the power storage device 20 and lowering toward the outside.
- the negative electrode lead 50 is brought into contact with the shoulder portion 25C in order to join the negative electrode lead 50 to the shoulder portion 25C of the outer can 25 by the inclined portion 34B, the negative electrode lead 50 is cut out using a joining tool or a jig. It becomes easy to accommodate in the portion 33.
- the regulation unit 34 may have a bottom surface 34C, and the bottom surface 34C may be in contact with the power storage device 20.
- the bottom surface 34C may be in contact with the shoulder portion 25C.
- the wall portion 31B of the accommodating portion 31 has a pressing portion 35 that presses the side peripheral surface of the power storage device 20 toward the side where the regulation unit 34 is formed, and a side peripheral surface of the power storage device 20.
- a support portion 36 for supporting is formed.
- the power storage device 20 is pushed toward the side where the radial support portion 36 is formed, and the radial dimensions of the upper holder 30 and the power storage device 20 are formed.
- the power storage device 20 can be unevenly distributed in the direction in which the pressing portion 35 pushes by absorbing the variation and the relative positional deviation between the upper holder 30 and the power storage device 20. Therefore, it is possible to prevent the shoulder portion 25C from being sufficiently exposed from the window defined by the notch portion 33 and the regulation portion 34 due to the dimensional tolerance and the assembly tolerance of the power storage device 20 and the upper holder 30.
- the shoulder portion 25C and the negative electrode lead 50 due to the insufficient exposure amount. It should be noted that the variation in the exposure amount of the shoulder portion 25C from the notch portion 33 can be suppressed as compared with the configuration in which the pressing portion 35 is not provided even if the pressing portion 35 is used without the supporting portion 36.
- the pressing portion 35 is a portion that presses the side peripheral surface of the outer can 25 of the power storage device 20 toward the side where the regulating portion 34 is formed in the circumferential direction at a position facing the regulating portion 34 in the circumferential direction. According to the pressing portion 35, the power storage device 20 is pressed to the side where the regulating portion 34 and the supporting portion 36 are formed in the radial direction. Therefore, the pressing unit 35 and the restricting unit 34 may be arranged on opposite sides of the power storage device 20. However, if a pushing force is generated toward the regulating portion 34, the pressing portion 35 does not necessarily have to be in a position symmetrical with respect to the central axis of the upper holder 30.
- the pressing portion 35 is formed so as to extend downward from the ceiling surface of the recess 35A formed at the edge of the wall portion 31B of the accommodating portion 31. Therefore, the pressing portion 35 is located in the recess 35A or adjacent to the recess 35A. With such a configuration, it becomes easy to integrally mold the pressing portion formed on the upper holder 30. Further, on the upper surface of the upper holder 30, a through hole may be formed at a position adjacent to the pressing portion 35 when the upper holder 30 is viewed in a plan view. This through hole facilitates integral molding when the pressing portion 35 is molded using a mold.
- the tip of the pressing portion 35 has a convex portion 35B protruding inward in the radial direction of the power storage device 20. The convex portion 35B is formed so as to project radially inward from the wall portion 31B of the accommodating portion 31 in a plan view. Further, a plurality of pressing portions 35 may be provided for one accommodating portion 31.
- the support portion 36 is a portion that supports the side peripheral surface of the outer can 25 of the power storage device 20 at substantially the same position in the circumferential direction as the regulation portion 34.
- the support portion 36 is formed as a groove shape along the vertical direction on the wall portion 31B of the accommodating portion 31.
- the groove-shaped opening edge of the wall portion 31B of the accommodating portion 31 abuts on the side peripheral surface of the power storage device 20 to support the side peripheral surface of the outer can 25 of the power storage device 20.
- the curvature of the inner peripheral surface of the wall portion 31B facing the power storage device 20 and the side peripheral surface of the power storage device 20 may be different.
- the portion of the power storage device 20 accommodated in the support portion 36 can more reliably abut on the opening edge portion.
- the curvature for example, the diameter of the inner peripheral surface of the wall portion 31B and the diameter of the side peripheral surface of the power storage device 20 can be made different.
- the support portion 36 is not limited to the groove shape along the vertical direction.
- it may be formed as a protrusion such as two ribs formed so as to project inward from the wall portion 31B of the accommodating portion 31 and formed along the vertical direction.
- each protrusion abuts on the side peripheral surface of the power storage device 20 to support the side peripheral surface of the outer can 25 of the power storage device 20.
- the support portion 36 may be provided at a plurality of locations on the wall portion 31B. Further, it does not have to be at substantially the same position in the circumferential direction of the power storage device. They may be separated from each other in the circumferential direction.
- FIG. 8 is a perspective view of the accommodating portion 61 of the upper holder 60 as viewed from above.
- FIG. 9 is a cross-sectional view taken along the line DD of FIG. In FIG. 9, the shape of the power storage device 20 is omitted.
- the upper holder 30 is a member that holds the upper end side of the plurality of power storage devices 20. Since the upper holder 60 has the same configuration as the upper holder 30 described above except for the regulating portion 64, only the regulating portion 64 will be described below. Specifically, the accommodating portion 61, the opening 62, the notch 63, the pressing portion 65, and the supporting portion 66 formed in the upper holder 60 are the accommodating portion 31, the opening formed in the upper holder 30 described above. It has the same configuration as the portion 32, the notch portion 33, the pressing portion 35, and the support portion 36.
- the regulation unit 64 is located inside the power storage device 20 in the radial direction from at least a part of the negative electrode lead 50. In other words, the regulating unit 64 regulates the negative electrode lead 50 so as not to move inward from the predetermined position in the radial direction.
- the predetermined position is preferably the radial inner end position (open end position of the outer can 25) of the shoulder portion 25C of the outer can 25 of the power storage device 20.
- the restricting portion 64 is formed so as to extend from one of the ceiling portions 61A forming the notch portion 63 inside the notch portion 63 in the radial direction.
- the regulating portion 64 is formed in the cutout portion 63 as a cantilever having the tip portion as a free end.
- the gap between the tip of the regulating portion 64 and the other ceiling portion 61A is preferably smaller than the length of the regulating portion 64.
- the negative electrode lead 50 is the shoulder portion 25C of the outer can 25 with the outer surface 64A of the regulating portion 64 and the tip portion 50A (see FIG. 6) of the negative electrode lead 50 in contact with each other or slightly separated in the radial direction of the power storage device 20. It may be joined to.
- the insulation distance between the top surface (positive electrode) of the sealing body 26 of the power storage device 20 and the negative electrode lead 50 can be secured, and the negative electrode lead 50 and the power storage device can be secured. It is possible to secure a bonding region with the shoulder portion 25C (negative electrode) of the outer can 25 of 20.
- the regulating portion 64 has an inclined portion 64B formed from the upper surface toward the outer surface 64A.
- the regulation unit 64 has a bottom surface 64C that inclines downward toward the tip side.
- the regulating portion 64 is formed so that the vertical position of the bottom surface 64C on the tip end side of the regulating portion 64 is located below the vertical position of the ceiling portion 61A.
- the regulating unit 64 positively comes into contact with the top surface of the power storage device 20. Therefore, the regulating unit 64 can prevent the negative electrode lead 50 from slipping between the regulating unit 64 and the power storage device 20.
- the vertical position of the bottom surface 64C on the tip side of the regulation unit 64 is located below the vertical position of the ceiling unit 61A, so that the bottom surface 64C of the regulation unit 64 stores electricity. It is possible to prevent the negative electrode lead 50 from coming into contact with the device 20 and slipping under the regulating portion 64.
- the regulating portion 64 extends from one of the ceiling portions 61A and is formed, so that the tip of the regulating portion 64 is formed.
- the side is slightly bent upward, and the bottom surface 64C of the regulation unit 64 can be prevented from coming into contact with the power storage device 20 and the negative electrode lead 50 from slipping under the regulation unit 64.
- the bottom surface 64C on the tip end side protruded downward.
- the bottom surface 64C on the root side of the regulating portion 64 may protrude downward.
- the entire bottom surface 64C of the regulating portion 64 may be projected without being biased toward the tip end side or the root side. Further, if the regulating portion 64 is bent, it may have a shape that supports both ends instead of a cantilever shape unlike the regulating portion 64.
- FIG. 10 is a plan view showing the negative electrode lead 70.
- FIG. 11 is a perspective view of FIG.
- the negative electrode lead 70 is a portion connected to the shoulder portion 25C (negative electrode terminal) of the outer can 25 of the power storage device 20 viewed from the cutout portion 33 of the upper holder 30.
- the negative electrode lead 70 can be applied to either the power storage module 10 having the upper holder 30 or the power storage module 10 having the upper holder 60, but an example applied to the power storage module 10 having the upper holder 30 will be described below. ..
- the negative electrode lead 70 has a joint portion 71 joined to the shoulder portion 25C (negative electrode terminal) of the outer can 25 of the power storage device 20, and the joint portion 71 is the main body of the second collector (not shown). ) With a connecting portion 72.
- the joint portion 71 includes a wall portion 71A formed upright at both ends of the power storage device 20 in the circumferential direction (in a broad sense, the direction intersecting the radial direction).
- the wall portion 71A is formed, for example, by bending.
- the wall portion 71A may have separate members joined to both ends of the connecting portion 72 in the circumferential direction.
- the vertical size of the wall portion 71A may be lower than the height protruding from the notch portion 33 on the top surface of the upper holder 60. Even if the size of the wall portion 71A in the vertical direction is smaller than the gap between the power storage device 20 and the regulation portion 64, the possibility of entering the gap can be reduced from the joint portion without the wall portion 71A. Further, if the size of the wall portion 71A in the vertical direction is larger than the gap, the possibility of entering the gap more remarkably can be reduced.
- the wall portion 71A increases the vertical size (height) of the negative electrode lead 70, so that it is possible to prevent the negative electrode lead 70 from slipping into the gap. ..
- the tip end portion (inner end side in the radial direction) of the joint portion 71 it is conceivable to bend the tip end portion (inner end side in the radial direction) of the joint portion 71 to form a wall portion at the tip end portion of the joint portion 71.
- the negative electrode current collecting foil including the lead 70 is manufactured by punching from one metal foil, the tip of the joint portion 71 of the negative electrode lead 70 and the tip of the positive electrode lead are close to each other in the metal foil before punching. In many cases. In such a case, it may be difficult to form a wall portion at the tip end portion of the joint portion 71.
- the negative electrode lead 70 is prevented from slipping under the regulation portion 34. be able to.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
Claims (11)
- 少なくとも一つの円筒形の蓄電装置と、
前記蓄電装置の一側を保持するホルダと、
を備え、
前記蓄電装置の一側の端部には、第1の端子及び第2の端子が配置され、
前記第2の端子は、前記蓄電装置の径方向において、前記第1の端子よりも外側に配置され、
前記第2の端子に前記径方向の外側から接続されるリードをさらに備え、
前記ホルダは、前記径方向において前記リードの少なくとも一部より内側に位置する規制部を有する、
蓄電モジュール。 - 請求項1に記載の蓄電モジュールであって、
前記ホルダは、前記第1の端子を露出させる開口部と、前記開口部の周囲に形成され、前記第2の端子を露出させる切り欠き部と、を有し、
前記規制部は、前記切り欠き部内に両端を支持されて形成される、
蓄電モジュール。 - 請求項1又は2に記載の蓄電モジュールであって、
前記ホルダは、前記蓄電装置の側周面を前記規制部が設けられる側に向けて押圧する押圧部を有する、
蓄電モジュール。 - 請求項3に記載の蓄電モジュールであって、
前記押圧部は、前記蓄電装置の側周面と当接する凸部を含む、
蓄電モジュール。 - 請求項3又は4に記載の蓄電モジュールであって、
前記押圧部は、前記ホルダの前記蓄電装置を収容する収容部の壁部に形成された凹部内に位置する、又は前記凹部と隣接している、
蓄電モジュール。 - 請求項3から5のいずれか一項に記載の蓄電モジュールであって、
前記ホルダは、前記蓄電装置の側周面を支持する支持部を有する、
蓄電モジュール。 - 請求項6に記載の蓄電モジュールであって、
前記支持部は、前記ホルダの前記蓄電装置の側周面と対向する面に形成される溝部である、
蓄電モジュール。 - 請求項1から7のいずれか一項に記載の蓄電モジュールであって、
前記規制部の底部と前記第2の端子とは当接している、
蓄電モジュール。 - 請求項1から8のいずれか一項に記載の蓄電モジュールであって、
前記規制部の頂面から外側面に延びた傾斜部を有する、
蓄電モジュール。 - 請求項2に記載の蓄電モジュールであって、
前記規制部の頂面は、前記ホルダの切り欠き部の頂面より低い位置にある、
蓄電モジュール。 - 請求項1から10のいずれか一項に記載の蓄電モジュールであって、
前記蓄電装置は、
第1電極と第2電極を含む電極体と、
前記電極体を電解質と共に収容すると共に、円筒状の筒部と該筒部の一端が開口された外装缶と、
前記外装缶の開口された一端を絶縁性のガスケットと共に塞ぐ封口体とを備え、
前記封口体は、前記第1電極と電気的に接続され、
前記外装缶は、前記第2電極と電気的に接続され、
前記外装缶の一端部は、前記外装缶の径方向に向かって内側へ向かって屈曲して前記封口体の外周縁と前記ガスケットを介して当接し、
前記第1の端子は、前記封口体であり、
前記第2の端子は、前記外装缶の一端部である、
蓄電モジュール。
Priority Applications (4)
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EP21851120.2A EP4191627A4 (en) | 2020-07-31 | 2021-07-21 | ELECTRICAL ENERGY STORAGE MODULE |
JP2022540229A JPWO2022024893A1 (ja) | 2020-07-31 | 2021-07-21 | |
US18/017,789 US20230344089A1 (en) | 2020-07-31 | 2021-07-21 | Electric power storage module |
CN202180059138.7A CN116134569A (zh) | 2020-07-31 | 2021-07-21 | 蓄电模块 |
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Citations (3)
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JP2018538655A (ja) * | 2015-10-02 | 2018-12-27 | アーコニック インコーポレイテッドArconic Inc. | エネルギー貯蔵装置および関連方法 |
WO2019058938A1 (ja) * | 2017-09-20 | 2019-03-28 | パナソニックIpマネジメント株式会社 | 電池モジュール |
JP2020518976A (ja) * | 2017-10-10 | 2020-06-25 | エルジー・ケム・リミテッド | 接続キャップを備える円筒状電池セル |
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JP5537111B2 (ja) * | 2009-09-30 | 2014-07-02 | 株式会社東芝 | 二次電池装置 |
JP6200675B2 (ja) * | 2012-04-13 | 2017-09-20 | 日立オートモティブシステムズ株式会社 | 電池ブロック及び二次電池モジュール |
US9966584B2 (en) * | 2013-03-11 | 2018-05-08 | Atieva, Inc. | Bus bar for battery packs |
CN105453302B (zh) * | 2013-08-09 | 2018-10-02 | 日立汽车系统株式会社 | 蓄电模块 |
JP7178593B2 (ja) * | 2017-12-26 | 2022-11-28 | パナソニックIpマネジメント株式会社 | 電池モジュール |
KR20200093334A (ko) * | 2019-01-28 | 2020-08-05 | 삼성에스디아이 주식회사 | 배터리 팩 |
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JP2018538655A (ja) * | 2015-10-02 | 2018-12-27 | アーコニック インコーポレイテッドArconic Inc. | エネルギー貯蔵装置および関連方法 |
WO2019058938A1 (ja) * | 2017-09-20 | 2019-03-28 | パナソニックIpマネジメント株式会社 | 電池モジュール |
JP2020518976A (ja) * | 2017-10-10 | 2020-06-25 | エルジー・ケム・リミテッド | 接続キャップを備える円筒状電池セル |
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JPWO2022024893A1 (ja) | 2022-02-03 |
EP4191627A4 (en) | 2024-01-24 |
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