WO2022025186A1 - 蓄電装置および蓄電モジュール - Google Patents
蓄電装置および蓄電モジュール Download PDFInfo
- Publication number
- WO2022025186A1 WO2022025186A1 PCT/JP2021/028107 JP2021028107W WO2022025186A1 WO 2022025186 A1 WO2022025186 A1 WO 2022025186A1 JP 2021028107 W JP2021028107 W JP 2021028107W WO 2022025186 A1 WO2022025186 A1 WO 2022025186A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power storage
- accommodating
- storage device
- electrode
- portions
- Prior art date
Links
- 238000003860 storage Methods 0.000 title claims abstract description 242
- 238000007789 sealing Methods 0.000 claims description 87
- 238000005452 bending Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 24
- 239000008151 electrolyte solution Substances 0.000 description 16
- 230000006866 deterioration Effects 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 230000036544 posture Effects 0.000 description 8
- 239000000565 sealant Substances 0.000 description 8
- 229920005992 thermoplastic resin Polymers 0.000 description 8
- 238000003466 welding Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000005304 joining Methods 0.000 description 4
- 229920001707 polybutylene terephthalate Polymers 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000004727 Noryl Substances 0.000 description 2
- 229920001207 Noryl Polymers 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000012447 hatching Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/74—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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/78—Cases; Housings; Encapsulations; Mountings
- H01G11/80—Gaskets; Sealings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/78—Cases; Housings; Encapsulations; Mountings
- H01G11/82—Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
-
- 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
- H01M50/10—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
- H01M50/20—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
-
- 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
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- 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
- H01M50/289—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
-
- 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
- H01M50/531—Electrode connections inside a battery casing
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/74—Terminals, e.g. extensions of current collectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/78—Cases; Housings; Encapsulations; Mountings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- This disclosure relates to a power storage device and a power storage module.
- each power storage device has a cylindrical outer can, and a wound electrode body is housed in each outer can.
- the power storage module may be used as a power source for vehicles and mobile terminals. Therefore, it is desired to reduce the weight of the power storage module.
- As a method of reducing the weight of the power storage module it is conceivable to wrap a plurality of electrode bodies with a common film outer body while maintaining individual sealing properties. As a result, a power storage device having a plurality of electrode bodies can be obtained. In this case, since the outer can that accommodates each electrode body can be eliminated, the weight of the power storage module can be reduced.
- each electrode body When sealing a plurality of electrode bodies with a film outer body, high sealing performance of each electrode body is required in order to ensure the safety of the power storage module and the power generation performance.
- the area of the sealing portion is large, the distance between the adjacent electrode bodies is widened, the outer dimensions of the power storage device are large, and the energy density of the power storage module may be lowered.
- the present disclosure has been made in view of such a situation, and one of the purposes thereof is to provide a technique for improving the energy density of the power storage module while suppressing the deterioration of the sealing property of the electrode body.
- This power storage device has a plurality of cylindrical electrode bodies, a plurality of accommodating portions individually wrapping the plurality of electrode bodies, and a sealing portion for sealing each accommodating portion and connecting the plurality of accommodating portions to each other. It comprises a film exterior that is bent or curved between adjacent accommodating portions and extends in a zigzag manner.
- This power storage module includes a plurality of power storage devices of the above-described embodiment and a holder for holding the plurality of power storage devices.
- This power storage device has a plurality of cylindrical electrode bodies, a plurality of accommodating portions individually wrapping the plurality of electrode bodies, and a sealing portion for sealing each accommodating portion and connecting the plurality of accommodating portions to each other.
- a film exterior body that breaks between adjacent housing portions and meanders in the arrangement direction of the electrode bodies is provided.
- a plurality of sealing portions are sandwiched between two adjacent accommodating portions and are connected to the first accommodating portion and the second accommodating portion, and a plurality of sealing portions outside each accommodating portion in the axial direction of the electrode body. It has an outer edge that extends over the containment.
- the first connecting portion and the second connecting portion are arranged alternately in the arrangement direction of the electrode body, and are displaced from each other in the axial direction and the orthogonal direction orthogonal to the arrangement direction, and extend in the arrangement direction.
- the outer edge portion is continuous from the first connecting portion and the accommodating portion, bends in the orthogonal direction toward the second connecting portion from the connection portion with the first connecting portion and the accommodating portion, and is fitted between the adjacent accommodating portions.
- the first tilted portion and the second tilted portion overlap each other on the accommodating portion when viewed from the axial direction to form an overlapping portion.
- the present disclosure it is possible to improve the energy density of the power storage module while suppressing the deterioration of the sealing property of the electrode body.
- FIG. 2A is a schematic view of the power storage device seen from the axial direction.
- FIG. 2B is a schematic view of the power storage device seen from the second direction.
- 3A to 3C are process diagrams of a method for manufacturing a power storage device.
- 4 (A) to 4 (C) are process diagrams of a method for manufacturing a power storage device.
- It is a perspective view of the power storage module which concerns on Embodiment 1.
- FIG. It is an exploded perspective view of a power storage module. It is a perspective view which shows the part of the power storage module enlarged. It is a perspective view of the power storage module which concerns on Embodiment 2.
- FIG. 14 (A) and 14 (B) are perspective views of a part of the power storage device seen from one side in the orthogonal direction.
- 15 (A) and 15 (B) are perspective views of a part of the power storage device seen from the other side in the orthogonal direction.
- 18 (A) to 18 (C) are process diagrams of a method for manufacturing a power storage device.
- 19 (A) to 19 (C) are process diagrams of a method for manufacturing a power storage device.
- FIG. 1 is a perspective view of the power storage device 1 according to the first embodiment.
- FIG. 2A is a schematic view of the power storage device 1 as viewed from the axial direction A.
- FIG. 2B is a schematic view of the power storage device 1 as seen from the second direction C.
- the inside of the film exterior body 4 is also shown for convenience of explanation. Further, the state before folding the film exterior body 4 is shown by a broken line.
- the direction in which the axis of the spiral of the electrode body 2 extends is defined as the axial center direction A
- the direction in which the plurality of electrode bodies 2 are arranged is the first direction B (in the present disclosure, it may be referred to as the arrangement direction B).
- the direction orthogonal to the axial center direction A and the first direction B is referred to as the second direction C (sometimes referred to as the orthogonal direction C in the present disclosure).
- the power storage device 1 of the present embodiment is, for example, a rechargeable secondary battery such as a lithium ion battery, a nickel-hydrogen battery, or a nickel-cadmium battery, or a capacitor such as an electric double layer capacitor.
- the power storage device 1 includes a plurality of electrode bodies 2 and a film exterior body 4.
- the power storage device 1 of the present embodiment includes eight electrode bodies 2, but the number thereof is not particularly limited and may be two or more.
- Each electrode body 2 has a cylindrical shape, and has a spirally wound structure in which a band-shaped first electrode plate and a band-shaped second electrode plate are laminated with a separator between electrodes interposed therebetween.
- the first electrode plate is a negative electrode plate
- the second electrode plate is a positive electrode plate.
- the first electrode lead 8 is electrically connected to the first electrode plate.
- the second electrode lead 10 is electrically connected to the second electrode plate.
- the first electrode lead 8 and the second electrode lead 10 are strip-shaped, and one end of each is welded to each electrode plate.
- the postures of the plurality of electrode bodies 2 are determined so that the axial center directions A of the electrode bodies 2 are parallel to each other, and the plurality of electrode bodies 2 are arranged in the first direction B at predetermined intervals.
- the plurality of electrode bodies 2 are wrapped in a common film exterior body 4.
- the film exterior body 4 has, for example, a structure in which two laminated films are laminated.
- Each laminated film has a structure in which a thermoplastic resin sheet is laminated on both sides of a metal sheet such as aluminum.
- the film exterior body 4 has a plurality of accommodating portions 12 and a sealing portion 14.
- the plurality of accommodating portions 12 are arranged in the first direction B at predetermined intervals.
- Each accommodating portion 12 has a cylindrical shape, and each electrode body 2 is individually wrapped and accommodated.
- Each accommodating portion 12 is composed of a bag portion provided on the film exterior body 4.
- the bag portion is a portion where the two laminated films are separated from each other. Therefore, each accommodating portion 12 projects from the sealing portion 14 along the shape of the side surface of the electrode body 2. That is, each accommodating portion 12 bulges in the thickness direction of the film exterior body 4.
- Each accommodating portion 12 accommodates the electrolytic solution 16 together with the electrode body 2.
- the sealing portion 14 surrounds the outer periphery of each accommodating portion 12 and seals each accommodating portion 12.
- the sealing portion 14 is composed of, for example, a welded portion of a thermoplastic resin sheet.
- the welded portion is obtained by thermocompression bonding the outer periphery of the bag portion of the film exterior 4 and welding the thermoplastic resin sheets of the two laminated films together.
- the sealing portion 14 seals each accommodating portion 12 and connects a plurality of accommodating portions 12 to each other.
- first electrode lead 8 and the second electrode lead 10 on the side opposite to the side connected to the electrode body 2 project to the outside of the film exterior body 4.
- the interface between each electrode lead and the film exterior 4 is sealed with a known sealant.
- the first electrode lead 8 and the second electrode lead 10 connected to each electrode body 2 project to the opposite sides in the axial direction A. Further, each first electrode lead 8 projects to the same side.
- the first electrode lead 8 and the second electrode lead 10 may project to the same side in the axial direction A.
- the film exterior body 4 is bent or curved between adjacent accommodating portions 12 and extends in a zigzag manner. That is, the film exterior body 4 meanders in the first direction B.
- the distance between the accommodating portions 12 in the first direction B can be narrowed compared to the state before folding, and thus the length of the power storage device 1 in the first direction B can be reduced. Can be shortened.
- the plurality of accommodating portions 12 of the present embodiment are arranged so that their centers are aligned on the same straight line when viewed from the axial direction A in a state where the film exterior body 4 extends in a zigzag manner.
- each accommodating portion 12 of the present embodiment projects outward from the sealing portion 14 in a zigzag bent state in the second direction C.
- the sealing portion 14 in a zigzag bent state is contained inside the accommodating portion 12 in the second direction C.
- the sizes of the power storage device 1 in the first direction B can be reduced while further suppressing the increase in the size of the power storage device 1 in the second direction C due to the folding of the film exterior body 4.
- the centers of the plurality of accommodating portions 12 do not necessarily have to be located on the same straight line.
- the sealing portion 14 has a pair of first side portions 14a and a pair of second side portions 14b that surround each accommodating portion 12.
- the pair of first side portions 14a are arranged in the axial center direction A with the respective accommodating portions 12 interposed therebetween, and seal the end portions of the respective accommodating portions 12 in the axial center direction A.
- the first side portion 14a of the present embodiment extends linearly through the center of the accommodating portion 12 when viewed from the axial direction A.
- the pair of second side portions 14b are arranged in a direction orthogonal to the axial center direction A with each accommodating portion 12 interposed therebetween, and extend in the axial center direction A to connect the pair of first side portions 14a.
- the two second side portions 14b located between the two adjacent accommodating portions 12 are connected to each other at a predetermined angle ⁇ , that is, in a non-linear manner. Further, the directions in which the connecting portions of the two second side portions 14b are refracted or curved are staggered in the plurality of connecting portions arranged in the first direction B. As a result, the film exterior body 4 extends in a zigzag manner in the first direction B.
- the angle ⁇ formed by the two second side portions 14b is, for example, an extension line of the first side portion 14a corresponding to (contacting) one accommodating portion 12 and the other accommodating portion 12. It is an angle at which the extension line of the corresponding first side portion 14a intersects.
- connection part is curved.
- the film exterior 4 is refracted or curved so that the two first side portions 14a corresponding to the two adjacent accommodating portions 12 extend in the direction in which they intersect each other. That is, the amount of bending (angle amount) or bending amount (angle amount) of the two second side portions 14b from the linear state is less than 180 °, and the two adjacent first side portions 14a extend non-parallel to each other.
- the angle ⁇ formed by the two second side portions 14b is an obtuse angle (more than 90 ° and less than 180 °).
- the amount of bending (angle amount) or bending amount (angle amount) is more than 0 ° and less than 90 °.
- FIGS. 4 (A) to 4 (C) are process diagrams of a method for manufacturing the power storage device 1.
- a first laminated film 20a is prepared.
- a plurality of semi-cylindrical recesses 18 are previously formed in the first laminated film 20a.
- the plurality of recesses 18 are formed by, for example, subjecting the first laminated film 20a to a known process such as press working.
- the electrode body 2 is placed in each recess 18.
- the first electrode lead 8 and the second electrode lead 10 are connected to the electrode body 2 in advance.
- a sealant (not shown) is provided on the first electrode lead 8 and the second electrode lead 10.
- the second laminated film 20b is superposed on the first laminated film 20a to form the film exterior body 4.
- the second laminated film 20b is provided with a semi-cylindrical recess 18 at a position facing each recess 18 of the first laminated film 20a. Therefore, by superimposing the first laminated film 20a and the second laminated film 20b, the accommodating portion 12 is formed by the pair of recesses 18.
- the method for forming the recess 18 in the second laminated film 20b is the same as the method for forming the recess 18 in the first laminated film 20a.
- a part of the film exterior body 4 is subjected to thermocompression bonding treatment to form a welded portion 22.
- the portion of the film exterior 4 that is not thermocompression bonded is the non-welded portion 24.
- the non-welded portion 24 is arranged so as to connect each accommodating portion 12 to the outside of the film exterior body 4.
- the non-welded portion 24 is provided so as to connect the side on which the first electrode lead 8 protrudes out of the four sides of each accommodating portion 12 to the outside of the film exterior body 4.
- the remaining three sides of each accommodating portion 12 are surrounded by the welding portion 22.
- the interface between the film exterior 4 and the second electrode lead 10 is sealed with a sealant.
- the electrolytic solution 16 is injected into each accommodating portion 12 via the non-welded portion 24.
- the non-welded portion 24 is also subjected to thermocompression bonding treatment.
- a sealing portion 14 surrounding the entire circumference of each accommodating portion 12 is formed.
- the interface between the film exterior 4 and the first electrode lead 8 is sealed with a sealant.
- the film exterior body 4 is bent in a zigzag shape.
- each electrode body 2 may be wrapped by using one laminated film having twice the length of the power storage device 1 and folding the laminated film in half.
- the step of injecting the electrolytic solution 16 shown in FIG. 4A can be omitted by infiltrating the electrolytic solution 16 into the inter-electrode separator in advance. can.
- the thermocompression bonding step shown in FIG. 3C the entire circumference of each housing portion 12 is thermocompression bonded to form the sealing portion 14.
- FIG. 5 is a perspective view of the power storage module 100 according to the first embodiment.
- FIG. 6 is an exploded perspective view of the power storage module 100.
- FIG. 7 is an enlarged perspective view showing a part of the power storage module 100.
- the power storage module 100 includes a plurality of power storage devices 1, a separator 102, a holder 104, an insulating plate 106, and a bus bar 108.
- the power storage module 100 of the present embodiment includes eight power storage devices 1, but the number thereof is not particularly limited and may be two or more.
- the plurality of power storage devices 1 are arranged in the second direction C with their postures determined so that their respective accommodating portions 12 are lined up in the same direction. Further, the plurality of power storage devices 1 are divided into a set of two units 110. The number of power storage devices 1 constituting the unit 110 is not limited to two.
- each unit 110 the two power storage devices 1 are placed on each other so that the axis of the electrode body 2 of the other power storage device 1 is located between the axes of the two adjacent electrode bodies 2 in one power storage device 1. It is arranged so as to be offset in the first arrangement direction B. That is, the accommodating portion 12 of the other electricity storage device 1 fits in the valley of the two accommodating portions 12 of the one electricity storage device 1. Thereby, the dimension of each unit 110 in the second direction C can be reduced.
- a separator 102 is arranged between the two power storage devices 1.
- the separator 102 is also called, for example, an insulating spacer, and electrically insulates between two adjacent power storage devices 1, holds the power storage device 1 with which it abuts, and absorbs assembly tolerances of a plurality of power storage devices 1. It is used to do.
- the separator 102 may be, for example, a corrugated plate having repeated irregularities in the first direction B, or a plate material having a thickness larger than the corrugated plate and having a plurality of recesses arranged in the first direction B on both sides. There may be.
- the separator 102 is made of, for example, an insulating resin.
- the resin constituting the separator 102 examples include thermoplastic resins such as polypropylene (PP), polybutylene terephthalate (PBT), polycarbonate (PC), and Noryl (registered trademark) resin (modified PPE). Further, the separator 102 may be made of an elastic material such as polyurethane or a silica-based heat insulating material. The separator 102 may be made of a metal such as aluminum, an aluminum alloy, or steel as long as the insulation state between the power storage devices 1 can be maintained.
- thermoplastic resins such as polypropylene (PP), polybutylene terephthalate (PBT), polycarbonate (PC), and Noryl (registered trademark) resin (modified PPE).
- the separator 102 may be made of an elastic material such as polyurethane or a silica-based heat insulating material.
- the separator 102 may be made of a metal such as aluminum, an aluminum alloy, or steel as long as the insulation state between the power storage devices 1 can be maintained
- the plurality of power storage devices 1 are held by the plurality of holders 104.
- Each holder 104 has a side plate 112 and a pair of protrusions 114.
- the side plate 112 is a rectangular plate extending in the first direction B.
- the pair of projecting portions 114 are rectangular plates projecting from both ends of the side plate 112 in the first direction B in the second direction C.
- the pair of protrusions 114 face each other in the first direction B. Therefore, the holder 104 has a substantially U-shape that is long in the first direction B.
- the posture of the holder 104 is determined so that the main surface of the side plate 112 faces the second direction C and the main surface of each protrusion 114 faces the first direction B.
- Each holder 104 is composed of one plate material as an example.
- the side plate 112 and the pair of protrusions 114 can be formed by bending both ends of the metal plate.
- the holder 104 may be made of resin as long as the rigidity equal to or higher than a predetermined value can be obtained. Further, the side plate 112 and the protruding portion 114, which are separate bodies from each other, may be joined to form the holder 104.
- Examples of the metal used for the holder 104 include aluminum, aluminum alloy, and steel.
- the resin used for the holder 104 includes thermoplastic resins such as polypropylene (PP), polybutylene terephthalate (PBT), polycarbonate (PC), and Noryl (registered trademark) resin (modified PPE); carbon fiber reinforced plastics and the like. Examples thereof include fiber-reinforced plastics (FRP) including glass fiber-reinforced plastics and the like.
- thermoplastic resins such as polypropylene (PP), polybutylene terephthalate (PBT), polycarbonate (PC), and Noryl (registered trademark) resin (modified PPE); carbon fiber reinforced plastics and the like.
- FRP fiber-reinforced plastics
- Each holder 104 is assembled to each unit 110 on a one-to-one basis.
- Each unit 110 is surrounded by a holder 104 on three sides in the first direction B and the second direction C.
- the side plate 112 covers one surface of the unit 110 in the second direction C.
- the pair of protrusions 114 covers both surfaces of the unit 110 in the first direction B.
- the side plate 112 is fixed to the facing power storage device 1 with an adhesive.
- the adhesive is preferably an insulating adhesive.
- An insulating sheet (not shown) may be interposed between the unit 110 and the holder 104.
- Each unit 110 is arranged in the second direction C with the holder 104 assembled. At this time, each unit 110 is arranged so that the exposed surface not covered by the holder 104 faces the same direction. With the units 110 arranged, the exposed surface of each unit 110 is covered with the side plate 112 of the holder 104 assembled to the adjacent unit 110 and fixed with an adhesive. As a result, each unit 110 is sandwiched between the pair of side plates 112 in the second direction C. Further, the side plate 112 located between the two units 110 is sandwiched between the two power storage devices 1.
- each protruding portion 114 has a tip portion 114a and a base end portion 114b.
- the base end portion 114b is interposed between the side plate 112 and the tip end portion 114a.
- the tip portion 114a is displaced from the base end portion 114b in a direction away from the unit 110. Therefore, the distance between the pair of protruding portions 114 is wider on the tip portion 114a side than on the proximal end portion 114b side. Then, each tip portion 114a projects to a position where it overlaps with the base end portion 114b of the adjacent holder 104 when viewed from the first direction B.
- the side plate 112 has a plurality of recesses 112a arranged in the first direction B. Each recess 112a has a groove shape extending in the axial direction A. Then, with the holder 104 assembled to the unit 110, each accommodating portion 12 of the power storage device 1 facing the side plate 112 fits into each recess 112a. As a result, the side plate 112 extends along the curved surface of each accommodating portion 12. As a result, the power storage device 1 can be held more stably. In particular, the displacement of the power storage device 1 in the first direction B can be regulated.
- the side plate 112 of the present embodiment has a corrugated plate shape that repeats unevenness in the first direction B. That is, when viewed from one main surface side, the plurality of concave portions 112a and the plurality of convex portions 112b are alternately arranged in the first direction B. Therefore, each accommodating portion 12 of the power storage devices 1 arranged on both sides of the side plate 112 can be fitted to the side plate 112. Specifically, with respect to the concave portion 112a and the convex portion 112b when the side plate 112 is viewed from one main surface side, each accommodating portion 12 of the one power storage device 1 is fitted in each concave portion 112a.
- each accommodating portion 12 of the other power storage device 1 is fitted into each convex portion 112b (which becomes a concave portion when viewed from the opposite side) from the back surface side. Thereby, the stability of each power storage device 1 in the power storage module 100 can be further improved.
- the unit 110 located at one end in the second direction C does not have the other unit 110 on the exposed surface side. Therefore, the end holder 105 is attached to the exposed surface of the unit 110.
- the end holder 105 has the same shape as the holder 104 except that the protruding direction of the protruding portion 114 is opposite to that of the holder 104 and the protruding portion 114 does not have the tip portion 114a.
- the bus bars 108 are placed on both sides of the plurality of units 110 in the axial direction A via the insulating plate 106. Then, the first electrode lead 8 and the second electrode lead 10 of each power storage device 1 are electrically connected to the bus bar 108. For example, each electrode lead is joined to the bus bar 108 by a known joining process such as laser welding.
- a known joining process such as laser welding.
- the insulating plate 106 may be an insulator having a predetermined hardness, and may be made of the same material as the separator 102, or may be made of another material.
- the postures of the two power storage devices 1 of each unit 110 are determined so that the first electrode leads 8 of each unit project to the same side. Further, the posture of each unit 110 is determined so that the protruding directions of the first electrode leads 8 are staggered. Therefore, when each electrode lead is joined to the bus bar 108, the electrode bodies 2 in each unit 110 are connected in parallel to each other, and each unit 110 is connected in series to each other.
- each electrode body 2 is not particularly limited.
- the first electrode lead 8 and the second electrode lead 10 may be arranged alternately, and the adjacent first electrode lead 8 and the second electrode lead 10 may be electrically connected to each other. That is, in each power storage device 1, a plurality of electrode bodies 2 may be connected in series. Further, in each unit 110, two power storage devices 1 may be connected in series. Further, all the electrode bodies 2 mounted on the power storage module 100 may be connected in series or may be connected in parallel.
- first electrode lead 8 and the second electrode lead 10 may project to the same side in the axial direction A.
- the electrical connection of each electrode body 2 becomes possible only by arranging the insulating plate 106 and the bus bar 108 only on one side of the power storage module 100. Therefore, the number of parts and the assembly man-hours of the power storage module 100 can be reduced.
- the power storage device 1 seals a plurality of cylindrical electrode bodies 2, a plurality of accommodating portions 12 that individually enclose the plurality of electrode bodies 2, and each accommodating portion 12. It also includes a film exterior 4 having a sealing portion 14 that connects the plurality of accommodating portions 12 to each other. Then, the film exterior body 4 is bent or curved between the adjacent accommodating portions 12 and extends in a zigzag manner. Further, the power storage module 100 according to the present embodiment includes a plurality of power storage devices 1 and a holder 104 for holding the plurality of power storage devices 1.
- the electrode body 2 When the electrode body 2 is individually housed in the plurality of housing parts 12, a large load is applied to the sealing part 14 due to the generation of gas in the housing part 12 and the expansion of the electrode body 2 due to the charging and discharging of the power storage device 1. In some cases. If the sealing portion 14 is damaged and the inside of the accommodating portion 12 and the outside of the film exterior body 4 are connected, the electrolytic solution 16 may leak to the outside of the film exterior body 4. Further, when the sealing portion 14 is damaged and the adjacent accommodating portions 12 are connected, the adjacent electrode bodies 2 are short-circuited or the amount of the electrolytic solution 16 is biased in the two accommodating portions 12, so that the power storage device The power generation performance of 1 may be deteriorated.
- the sealing portion 14 in order to ensure the sealing property of the electrode body 2, it is desired to increase the area of the sealing portion 14 to increase the strength of the sealing portion 14.
- the increase in size of the sealing portion 14 leads to the increase in size of the power storage device 1.
- the increase in size of the power storage device 1 leads to a decrease in the filling rate of the electrode body 2 in the power storage module 100, that is, the energy density of the power storage module 100.
- the sealing portion 14 is made smaller in order to increase the energy density of the power storage module 100, the sealing property of the electrode body 2 is sacrificed.
- the film exterior body 4 is folded in a zigzag manner.
- the distance between the adjacent accommodating portions 12 and the length of the power storage device 1 can be shortened as compared with the case where the film exterior body 4 is not folded, without reducing the sealing portion 14.
- the film exterior body 4 has a pouch structure in which a plurality of electrode bodies 2 are sealed, the weight of the power storage module 100 can be reduced as compared with the case where each electrode body 2 is individually sealed with an outer can. .. In particular, when the number of electrode bodies 2 mounted on the power storage module 100 increases as the capacity of the power storage module 100 increases, a remarkable weight reduction effect can be obtained.
- the sealing portion 14 of the present embodiment has a first side portion 14a that seals the end portion of each accommodating portion 12 in the axial center direction A of the electrode body 2. Then, the film exterior body 4 is refracted or curved so that the two first side portions 14a corresponding to the two adjacent accommodating portions 12 extend in the direction in which they intersect with each other. As a result, it is possible to easily prevent the sealing portion 14 from protruding outward from the accommodating portion 12 in the second direction C. Alternatively, the amount of protrusion of the sealing portion 14 can be reduced. As a result, it is possible to suppress the increase in size of the power storage device 1 in the second direction C, so that the energy density of the power storage module 100 can be further increased.
- the holder 104 of the present embodiment has a side plate 112 extending in the arrangement direction (first direction B) of the plurality of accommodating portions 12.
- the side plate 112 has a plurality of recesses 112a arranged in the first direction B, and each accommodating portion 12 is fitted in each recess 112a.
- the side plate 112 of the present embodiment has a corrugated plate shape that repeats unevenness in the first direction B and is sandwiched between two power storage devices 1. Then, each accommodating portion 12 of one power storage device 1 is fitted in each recess 112a when viewed from one main surface side, and each convex portion 112b when viewed from the main surface side is fitted with the other power storage device 1. Each accommodating portion 12 is fitted from the back surface side. Thereby, the stability of each power storage device 1 in the power storage module 100 can be further improved.
- FIG. 8 is a perspective view of the power storage module 100 according to the second embodiment.
- FIG. 9 is an exploded perspective view of the power storage module 100.
- FIG. 10 is a cross-sectional view of the power storage module 100.
- the power storage module 100 of the present embodiment includes a plurality of power storage devices 1, a holder 104, and a bus bar 108.
- the number of power storage devices 1 included in the power storage module 100 and the number of electrode bodies 2 included in the power storage device 1 are not limited to those shown in the drawings.
- Each power storage device 1 includes a plurality of electrode bodies 2 and a film exterior body 4.
- the first electrode lead 8 and the second electrode lead 10 project from each electrode body 2.
- the film exterior body 4 has a plurality of accommodating portions 12 and a sealing portion 14. The film exterior 4 bends or bends between adjacent accommodating portions 12 and extends in a zigzag manner.
- the plurality of power storage devices 1 are arranged in the second direction C with their postures determined so that their respective accommodating portions 12 are lined up in the same direction.
- the two adjacent power storage devices 1 are arranged so as to be offset in the first direction B so that the storage unit 12 of the other power storage device 1 fits in the valley of the two storage units 12 of one power storage device 1.
- the plurality of power storage devices 1 are held by the holder 104.
- the holder 104 of the present embodiment is composed of a first plate 118 and a second plate 120.
- the first plate 118 and the second plate 120 are plate-like bodies extending in the first direction B and the second direction C, and sandwich a plurality of power storage devices 1 in the axial direction A.
- the materials constituting the first plate 118 and the second plate 120 are the same as those of the holder 104 of the first embodiment.
- a plurality of support portions 122 which are bottomed cylindrical recesses, are provided on the surfaces of the first plate 118 and the second plate 120 facing the power storage device 1.
- the plurality of support portions 122 are arranged so as to overlap the accommodating portions 12 of each power storage device 1 in the axial center direction A, and the end portions of the accommodating portions 12 in the axial center direction A are fitted into the accommodating portions 122.
- each plate and the plurality of power storage devices 1 are fixed with an adhesive.
- a plurality of pillars (not shown) may be interposed between the first plate 118 and the second plate 120 to connect the plurality of pillars and each plate.
- first plate 118 and the second plate 120 are provided with a plurality of slits 124 that penetrate each plate in the axial direction A and extend in a zigzag manner in the first direction B.
- Each slit 124 extends so as to connect adjacent support portions 122, that is, across a plurality of support portions 122, while dividing the bottom portion of each support portion 122.
- the plurality of slits 124 are arranged so as to overlap the sealing portion 14 of each power storage device 1 in the axial center direction A, and the end portions (including the first side portion 14a) of each sealing portion 14 in the axial center direction A are arranged. It is inserted through the slit 124.
- the first electrode lead 8 and the second electrode lead 10 of each power storage device 1 project to the outside of the holder 104. Only the first electrode lead 8 and the second electrode lead 10 may be inserted into the slit 124.
- bus bar mounting surfaces 126 are provided on the surfaces of the first plate 118 and the second plate 120 facing the opposite side of the power storage device 1. Therefore, the holder 104 of the present embodiment also has a function as the insulating plate 106 of the first embodiment. Each bus bar mounting surface 126 is arranged between two slits 124 arranged in the second direction C.
- all the first electrode leads 8 project to the same side. Therefore, when each electrode lead is joined to the bus bar 108, all the electrode bodies 2 are connected in parallel.
- the mode of electrical connection of each electrode body 2 is not particularly limited.
- the shape of the bus bar 108 is not limited. For example, a plurality of bus bars connecting adjacent electrode bodies 2 in series may be arranged in the first direction B.
- the holder 104 of the present embodiment has the first plate 118 and the second plate 120, but may have only one plate. For example, by increasing the size of one plate in the axial direction A and providing the deeper support portion 122, the plurality of power storage devices 1 can be held only by the one plate.
- the number of parts and the assembly man-hours of the power storage module 100 can be reduced. According to the first embodiment, the number of the power storage devices 1 mounted on the power storage module 100 can be changed more easily than in the present embodiment.
- FIG. 11 is a perspective view of the power storage device 1 according to the third embodiment.
- FIG. 12 is a perspective view of the power storage device 1 before the outer edge portion 26 is folded.
- a part of the electrode body 2 is shown by a broken line.
- the direction in which the spiral axis of the electrode body 2 extends is defined as the axial center direction A
- the arrangement direction of the plurality of electrode bodies 2 is defined as the arrangement direction B
- the directions orthogonal to the axial center direction A and the arrangement direction B are defined. Let it be the orthogonal direction C.
- the power storage device 1 of the present embodiment is, for example, a rechargeable secondary battery such as a lithium ion battery, a nickel-hydrogen battery, or a nickel-cadmium battery, or a capacitor such as an electric double layer capacitor.
- the power storage device 1 includes a plurality of electrode bodies 2 and a film exterior body 4.
- the power storage device 1 of the present embodiment includes eight electrode bodies 2, but the number thereof is not particularly limited and may be two or more.
- Each electrode body 2 has a cylindrical shape, and has a spirally wound structure in which a band-shaped first electrode plate and a band-shaped second electrode plate are laminated with a separator between electrodes interposed therebetween.
- the first electrode plate is a negative electrode plate
- the second electrode plate is a positive electrode plate.
- the first electrode lead 8 is electrically connected to the first electrode plate.
- the second electrode lead 10 is electrically connected to the second electrode plate.
- the first electrode lead 8 and the second electrode lead 10 have a band shape (a rectangular shape long in one direction), and one end of each is welded to each electrode plate.
- the postures of the plurality of electrode bodies 2 are determined so that the axial center directions A of the electrode bodies 2 are parallel to each other, and the plurality of electrode bodies 2 are arranged in the arrangement direction B at predetermined intervals.
- the plurality of electrode bodies 2 are wrapped in a common film exterior body 4.
- the film exterior body 4 has, for example, a structure in which two laminated films are laminated. Each laminated film has a structure in which a thermoplastic resin sheet is laminated on both sides of a metal sheet such as aluminum. Further, the film exterior body 4 has a plurality of accommodating portions 12 and a sealing portion 14. The plurality of accommodating portions 12 are arranged in the arrangement direction B at predetermined intervals. Each accommodating portion 12 has a cylindrical shape, and each electrode body 2 is individually wrapped and accommodated. Each accommodating portion 12 is composed of a bag portion provided on the film exterior body 4. The bag portion is a portion of the two laminated films separated from each other. Therefore, each accommodating portion 12 projects from the sealing portion 14 along the shape of the side surface of the electrode body 2. Each accommodating portion 12 accommodates an electrolytic solution together with the electrode body 2.
- the sealing portion 14 surrounds the outer periphery of each accommodating portion 12 and seals each accommodating portion 12.
- the sealing portion 14 is composed of, for example, a welded portion of a thermoplastic resin sheet.
- the welded portion is obtained by thermocompression bonding the outer periphery of the bag portion of the film exterior 4 and welding the thermoplastic resin sheets of the two laminated films together.
- the sealing portion 14 seals each accommodating portion 12 and connects a plurality of accommodating portions 12 to each other.
- the ends of the first electrode lead 8 and the second electrode lead 10 on the side opposite to the side connected to the electrode body 2 project to the outside of the film exterior body 4. Further, the first electrode lead 8 and the second electrode lead 10 connected to each electrode body 2 project to the opposite sides in the axial direction A. Further, each first electrode lead 8 projects to the same side.
- the sealing portion 14 of the present embodiment has a pair of outer edge portions 26 extending over a plurality of accommodating portions 12 outside each accommodating portion 12 in the axial direction A. Each first electrode lead 8 projects from one outer edge portion 26 to the outside of the film exterior body 4. Each second electrode lead 10 projects from the other outer edge portion 26 to the outside of the film exterior body 4. The interface between each electrode lead and the outer edge 26 is sealed with a known sealant.
- the film exterior body 4 breaks between the adjacent accommodating portions 12 and meanders in the arrangement direction B. That is, the film exterior body 4 extends substantially in a zigzag manner when viewed from the axial direction A. By folding the film exterior 4 in a zigzag manner, the distance between the accommodating portions 12 in the arrangement direction B can be narrowed as compared with the state before folding, and therefore the length of the power storage device 1 in the arrangement direction B can be shortened. Can be done.
- the plurality of accommodating portions 12 of the present embodiment are arranged so that their centers are aligned on the same straight line when viewed from the axial direction A in a state where the film exterior body 4 is meandering.
- the sealing portion 14 bent in a zigzag shape is accommodated inside the accommodating portion 12 in the orthogonal direction C.
- the centers of the plurality of accommodating portions 12 do not necessarily have to be located on the same straight line.
- the sealing portion 14 has a first connecting portion 28 and a second connecting portion 30 that are sandwiched between two adjacent accommodating portions 12 and connect the two accommodating portions 12.
- the first connecting portion 28 and the second connecting portion 30 are arranged alternately in the arrangement direction B and are displaced from each other in the orthogonal direction C. Further, each connecting portion is long in the axial direction A and extends parallel to the arrangement direction B.
- Each connecting portion is sandwiched between two accommodating portions 12 in the arrangement direction B and sandwiched between two outer edge portions 26 in the axial direction A. In each accommodating portion 12, both ends in the axial direction A are sealed by the outer edge portion 26, one end of the arrangement direction B is sealed by the first connecting portion 28, and the other end of the arrangement direction B is sealed. It is sealed by the second connecting portion 30.
- the region of the outer edge portion 26 that is continuous from the accommodating portion 12, that is, the region that overlaps with the accommodating portion 12 when viewed from the axial direction A, is in the axial center direction. Seen from A, it extends linearly through the center of the accommodating portion 12 and diagonally with respect to the arrangement direction B. Further, in the two adjacent accommodating portions 12, the outer edge portion 26 on one accommodating portion 12 and the outer edge portion 26 on the other accommodating portion 12 are extended in alternating directions. Further, the outer edge portion 26 on the accommodating portion 12 and the outer edge portion 26 on the first connecting portion 28 are connected to each other at a predetermined angle, that is, in a non-linear manner. The outer edge portion 26 on the accommodating portion 12 and the outer edge portion 26 on the second connecting portion 30 are also connected in a non-linear manner. As a result, the outer edge portion 26 and thus the film exterior body 4 meander in the arrangement direction B.
- the outer edge portion 26 is tilted in the orthogonal direction C from the standing state as shown in FIG. 12, and is laid down as shown in FIG. As a result, the size of the power storage device 1 in the axial direction A can be reduced.
- the outer edge portion 26 since the outer edge portion 26 is meandering, if it is simply tilted in the orthogonal direction C, it will bend in a disorderly manner. If the outer edge portion 26 is bent in a disorderly manner, the number of broken lines formed and the total length are increased. Since the film exterior 4 is made by welding two laminated films, the film is easily peeled off at the broken line portion. Therefore, it is desired to reduce the number of broken lines generated when the outer edge portion 26 is tilted in the orthogonal direction C as much as possible.
- FIG. 13 is a view of the power storage device 1 as viewed from the axial direction A.
- 14 (A) and 14 (B) are perspective views of a part of the power storage device 1 as seen from one side C1 in the orthogonal direction C.
- 15 (A) and 15 (B) are perspective views of a part of the power storage device 1 as seen from the other side C2 in the orthogonal direction C.
- the sealing portion 14 has a first connecting portion 28 and a second connecting portion 30.
- the first connecting portion 28 is displaced from the center line L passing through the centers of the plurality of accommodating portions 12 to one side C1 in the orthogonal direction C, and extends in parallel with the center line L.
- the second connecting portion 30 is displaced from the center line L toward the other side C2 in the orthogonal direction C and extends in parallel with the center line L.
- the outer edge portion 26 has a first tilted portion 32 and a second tilted portion 34.
- the region indicated by the horizontal broken line is the first tilted portion 32
- the region indicated by the vertical broken line is the second tilted portion 34.
- the first tilting portion 32 is a region continuous from the first connecting portion 28 and the accommodating portion 12, and at the connecting portion with the first connecting portion 28 and the accommodating portion 12, the first tilting portion 32 is the second in the orthogonal direction C with the connecting portion as the starting point. 2 It bends to the connecting portion 30 side, that is, the other side C2.
- the second tilting portion 34 is a region continuous from the second connecting portion 30 and the two first tilting portions 32 arranged so as to sandwich the second connecting portion 30, the second connecting portion 30 and the two second. 1
- the connection portion is bent to the first connecting portion 28 side in the orthogonal direction C, that is, one side C1 from the connection portion.
- the connecting portion between the first tilted portion 32 and the second tilted portion 34 corresponds to a folding line 36 in which the outer edge portion 26 tilted to the other side C2 side is folded back to the one side C1 side.
- One end point of the folding line 36 touches the second connecting portion 30.
- the portion of the outer edge portion 26 on the first connecting portion 28 when viewed from the axial center direction A is tilted to the other side C2 side to form a part of the first tilted portion 32.
- the portion on the second connecting portion 30 is tilted to one side C1 to form a part of the second tilted portion 34.
- the portion on the accommodating portion 12 is tilted to the other side C2 side and then slanted back and tilted to the one side C1 side, and the portion tilted to the other side C2 side constitutes a part of the first tilting portion 32.
- the portion tilted to C1 on one side constitutes a part of the second tilted portion 34.
- the first tilting portion 32 and the second tilting portion 34 overlap each other on the accommodating portion 12 when viewed from the axial direction A to form the overlapping portion 38.
- the region shown by the actual diagonal line is the overlapping portion 38.
- the first tilting portion 32 is located closer to the accommodating portion 12 than the second tilting portion 34. That is, the second tilted portion 34 overlaps the first tilted portion 32.
- the first tilting portion 32 has a valley folding portion 40 that is fitted between the adjacent accommodating portions 12.
- the portion slackened in the arrangement direction B due to tilting to the other side C2 side that is, the portion remaining in the first tilting portion 32 due to the difference in peripheral length between the inner peripheral edge side and the outer peripheral edge side is accommodated. It is fitted between the portions 12 to form a valley fold portion 40.
- the second tilted portion 34 of the present embodiment has a connection portion with the second connecting portion 30 (the boundary line between the second tilted portion 34 and the second connecting portion 30) at the bottom when viewed from the axial direction A. It has an isosceles trapezoidal shape with two folding lines 36 (connecting portions between the first tilting portion 32 and the second tilting portion 34) connecting the first tilting portion 32 and the second tilting portion 34 as legs. As a result, the total length of the polygonal line formed on the outer edge portion 26 can be further shortened.
- the end point of the folding line 36 opposite to the second connecting portion 30 is referred to as an end point P1
- the end point in contact with the second connecting portion 30 is referred to as an end point P2.
- the connecting portion between the first tilting portion 32 and the accommodating portion 12 is defined as a boundary line L1
- the perpendicular line drawn from the end point P1 to the boundary line L1 is defined as a perpendicular line L2.
- the intersection of the boundary line L1 and the perpendicular line L2 is defined as the intersection P3.
- the outermost side of the film exterior body 4 is defined as the outermost side L3.
- the turn-back line 36 and the outermost side L3 meet at the end point P1.
- Triangles having endpoints P1, endpoints P2, and intersections P3 as vertices are formed on both sides of each second connecting portion 30 in the arrangement direction B.
- the length from the intersection P3 to the end point P2 in one triangle, the length of the second connecting portion 30 (the length between the two end points P2), and the length from the end point P2 to the intersection P3 in the other triangle. Is approximately equal to the length of the outermost edge L3 between the two endpoints P1.
- the first electrode lead 8 of each electrode body 2 is electrically connected by a bus bar 42.
- the bus bar 42 is a strip-shaped conductive member extending in the arrangement direction B. Specifically, as shown in FIG. 14B, the bus bar 42 is inserted from one side C1 between each accommodating portion 12 and each first electrode lead 8.
- Each first electrode lead 8 is joined to the bus bar 42 by a known joining process such as laser welding while being placed on the bus bar 42.
- An insulating sheet may be interposed between the bus bar 42 and each accommodating portion 12. The same applies to the case where the second electrode lead 10 of each electrode body 2 is electrically connected.
- a plurality of first electrode leads 8 project to the same side. Therefore, when each electrode lead is joined to the bus bar 42, all the electrode bodies 2 are connected in parallel to each other.
- the mode of electrical connection of each electrode body 2 is not particularly limited, and for example, the first electrode lead 8 and the second electrode lead 10 are arranged alternately, and the adjacent first electrode lead 8 and the second electrode lead 10 are arranged. May be electrically connected. That is, a plurality of electrode bodies 2 may be connected in series. Further, the first electrode lead 8 and the second electrode lead 10 in each electrode body 2 may project to the same side in the axial direction A. As a result, the electrical connection of each electrode body 2 becomes possible only by arranging the bus bar 42 on only one side in the axial direction A. Therefore, the man-hours for connecting the power storage device 1 can be reduced.
- FIG. 16 is a diagram showing an arrangement mode of a plurality of power storage devices 1.
- the plurality of power storage devices 1 are arranged in the orthogonal direction C as an example. Further, the posture of each power storage device 1 is determined so that the accommodating portions 12 are arranged in the same direction. Further, the first electrode lead 8 of each power storage device 1 is arranged so as to extend to the same side in the orthogonal direction C. The same applies to the second electrode lead 10.
- the two power storage devices 1 adjacent to each other in the orthogonal direction C are arranged so that the axis of the electrode body 2 of the other power storage device 1 is located between the axes of the two adjacent electrode bodies 2 in one power storage device 1. They are arranged so as to be offset from each other in the arrangement direction B. That is, the accommodating portion 12 of the other electricity storage device 1 fits in the valley of the two accommodating portions 12 of the one electricity storage device 1. As a result, the size of the power storage module in the orthogonal direction C can be reduced.
- the number of power storage devices 1 constituting the power storage module may be three or more.
- the two power storage devices 1 shown in FIG. 16 are arranged so that the first electrode leads 8 project in the same direction, but the first electrode leads 8 project in opposite directions. May be done.
- FIG. 17 is a schematic diagram for explaining the arrangement of the electrode leads.
- the arrangement of the electrode leads will be described by taking the first electrode lead 8 as an example, but the same applies to the case of the second electrode lead 10.
- the first electrode lead 8 is bent at the boundary line L1 between the first tilting portion 32 and the accommodating portion 12. Further, when the first electrode lead 8 passes through the superposed portion 38, the first electrode lead 8 is also bent at the folding line 36.
- the first electrode lead 8 and the outer edge portion 26 may be peeled off from the bent portion, and the peeled portion 44 may be formed.
- the peeling portion 44 is more likely to occur at a location where the number of laminated members is large.
- the portion where the first electrode lead 8 and the outer edge portion 26 overlap has a structure in which at least three members, specifically, the first electrode lead 8 and two laminated films are laminated. Therefore, the peeled portion 44 is more likely to be formed than the portion where the first electrode lead 8 does not extend. Since the first electrode lead 8 is bent at two points as described above, two peeling portions 44 can be formed along the protruding direction of the first electrode lead 8. When the accommodating portion 12 and the outside of the film exterior 4 are communicated with each other via the two peeling portions 44, a leakage path for the contents of the accommodating portion 12 is formed, and the sealing property of the sealing portion 14 is formed at the relevant portion. Will be missing.
- the first electrode lead 8 of the present embodiment is displaced from the midpoint 36a of the folding line 36 (connecting portion) connecting the first tilting portion 32 and the second tilting portion 34. Arranged to pass through the position. At the midpoint 36a of the folding line 36, the distance D1 from the boundary line L1 to the folding line 36 and the distance D2 from the folding line 36 to the outermost side L3 of the film exterior 4 are approximately equal. Therefore, when the first electrode lead 8 passes through the midpoint 36a, the possibility that the above-mentioned leakage path is formed by the two peeling portions 44 that can be formed along the first electrode lead 8 increases. Therefore, by arranging the first electrode lead 8 so as to deviate from the midpoint 36a of the folding line 36, it is possible to suppress the deterioration of the sealing property of the electrode body 2 due to the folding of the outer edge portion 26.
- the turn-back line 36 moves away from the outermost side L3 as it gets closer to the second connecting portion 30 than the midpoint 36a. Therefore, by moving the position where the first electrode lead 8 passes through the folding line 36 closer to the second connecting portion 30 than the midpoint 36a, the peeling portion 44 that can be formed around the folding line 36 is formed from the outermost side L3. Can be separated. Therefore, the formation of the leakage route can be suppressed.
- the turn-back line 36 is separated from the boundary line L1 as it is farther from the second connecting portion 30 than the midpoint 36a.
- the peeling portion 44 which can be formed around the folding line 36 is formed around the boundary line L1. It can be separated from the peeling portion 44 formed in. Therefore, the formation of the leakage route can be suppressed.
- the first electrode lead 8 is arranged so that at least a part of the first electrode lead 8 passes through the outer end region R (the region of the outer 1/4) when the folding line 36 is divided into four equal parts. More preferably, the first electrode lead 8 is arranged so as to pass through the outer end region R as a whole. As a result, the peeling portion 44 that may be formed around the folding line 36 can be further separated from the outermost side L3 or the peeling portion 44 formed around the boundary line L1. Therefore, the formation of the leakage route can be further suppressed.
- the first electrode lead 8 may be arranged so as to pass outside the superimposing portion 38. In this case, the position where the first electrode lead 8 is bent is only the position where it overlaps with the boundary line L1. Therefore, the formation of the leakage route can be further suppressed.
- the peeled portion 44 is not always formed in the power storage device 1 of the present disclosure (it may not be formed).
- 18 (A) to 18 (C) and 19 (A) to 19 (C) are process diagrams of the manufacturing method of the power storage device 1.
- a first laminated film 20a is prepared.
- a plurality of semi-cylindrical recesses 18 are previously formed in the first laminated film 20a.
- the plurality of recesses 18 are formed by, for example, subjecting the first laminated film 20a to a known process such as press working.
- the electrode body 2 is placed in each recess 18.
- the first electrode lead 8 and the second electrode lead 10 are connected to the electrode body 2 in advance.
- a sealant (not shown) is provided on the first electrode lead 8 and the second electrode lead 10.
- the second laminated film 20b is superposed on the first laminated film 20a to form the film exterior body 4.
- the second laminated film 20b is provided with a semi-cylindrical recess 18 at a position facing each recess 18 of the first laminated film 20a. Therefore, by superimposing the first laminated film 20a and the second laminated film 20b, the bag portion, in other words, the accommodating portion 12 is formed by the pair of recesses 18.
- the method for forming the recess 18 in the second laminated film 20b is the same as the method for forming the recess 18 in the first laminated film 20a.
- a part of the film exterior body 4 is subjected to thermocompression bonding treatment to form a welded portion 22.
- the portion of the film exterior 4 that is not thermocompression bonded is the non-welded portion 24.
- the non-welded portion 24 is arranged so as to connect each accommodating portion 12 to the outside of the film exterior body 4.
- the non-welded portion 24 is provided so as to connect the side on which the first electrode lead 8 protrudes out of the four sides of each accommodating portion 12 to the outside of the film exterior body 4.
- the remaining three sides of each accommodating portion 12 are surrounded by the welding portion 22.
- the interface between the film exterior 4 and the second electrode lead 10 is sealed with a sealant.
- the electrolytic solution 16 is injected into each accommodating portion 12 via the non-welded portion 24.
- the non-welded portion 24 is also subjected to thermocompression bonding treatment.
- a sealing portion 14 surrounding the entire circumference of each accommodating portion 12 is formed.
- the interface between the film exterior 4 and the first electrode lead 8 is sealed with a sealant.
- the film exterior body 4 is bent in a zigzag shape. Further, the outer edge portion 26 is folded.
- a jig corresponding to the shape of the first tilted portion 32 is applied from the other side C2
- a jig corresponding to the shape of the second tilted portion 34 is applied from the one side C1 side to the press machine. It can be realized by pressing the outer edge portion 26 with.
- each electrode body 2 may be wrapped by using one laminated film having twice the length of the power storage device 1 and folding the laminated film in half.
- the step of injecting the electrolytic solution 16 shown in FIG. 19A can be omitted by infiltrating the electrolytic solution 16 into the separator between electrodes in advance. can.
- the thermocompression bonding step shown in FIG. 18C the entire circumference of each housing portion 12 is thermocompression bonded to form the sealing portion 14.
- the power storage device 1 seals a plurality of cylindrical electrode bodies 2, a plurality of accommodating portions 12 that individually enclose the plurality of electrode bodies 2, and each accommodating portion 12. It also has a sealing portion 14 that connects a plurality of accommodating portions 12 to each other, and includes a film exterior body 4 that is folded between adjacent accommodating portions 12 and meanders in the arrangement direction B.
- the sealing portion 14 is sandwiched between two adjacent accommodating portions 12, and the first connecting portion 28 and the second connecting portion 30 that connect the two accommodating portions 12 and each accommodating portion 14 in the axial direction A of the electrode body 2. It has an outer edge portion 26 extending beyond the portion 12 and extending over the plurality of accommodating portions 12.
- the first connecting portion 28 and the second connecting portion 30 are arranged alternately in the arrangement direction B of the electrode body 2, and are displaced from each other in the axial direction A and the orthogonal direction C orthogonal to the arrangement direction B, and extend in the arrangement direction B. ..
- the outer edge portion 26 has a first tilted portion 32 and a second tilted portion 34.
- the first tilting portion 32 is continuous from the first connecting portion 28 and the accommodating portion 12, bends toward the second connecting portion 30 in the orthogonal direction C from the connection portion with these, and is between the adjacent accommodating portions 12. It has a valley fold portion 40 that fits into.
- the second tilting portion 34 is continuous from the second connecting portion 30 and the two first tilting portions 32 arranged so as to sandwich the second connecting portion 30, and is first connected in the orthogonal direction C with the connecting portion as a starting point. It bends to the part 28 side.
- the first tilted portion 32 and the second tilted portion 34 overlap each other on the accommodating portion 12 when viewed from the axial direction A to form an overlapping portion 38.
- the electrode body 2 When the electrode body 2 is individually housed in the plurality of housing parts 12, a large load is applied to the sealing part 14 due to the generation of gas in the housing part 12 and the expansion of the electrode body 2 due to the charging and discharging of the power storage device 1. In some cases. If the sealing portion 14 is damaged and the inside of the accommodating portion 12 and the outside of the film exterior body 4 are connected, the electrolytic solution 16 may leak to the outside of the film exterior body 4. Further, when the sealing portion 14 is damaged and the adjacent accommodating portions 12 are connected, the adjacent electrode bodies 2 are short-circuited or the amount of the electrolytic solution 16 is biased in the two accommodating portions 12, so that the power storage device The power generation performance of 1 may be deteriorated.
- the increase in size of the sealing portion 14 leads to the increase in size of the power storage device 1.
- the increase in size of the power storage device 1 leads to a decrease in the filling rate of the electrode body 2 in the power storage module, that is, the energy density of the power storage module 100.
- the sealing portion 14 is made smaller in order to increase the energy density of the power storage module, the sealing property of the electrode body 2 is sacrificed.
- the film exterior body 4 is folded so as to meander in the arrangement direction B.
- the distance between the adjacent accommodating portions 12 and the length of the power storage device 1 in the arrangement direction B can be shortened without reducing the sealing portion 14.
- the outer edge portion 26 extending to the outside of the accommodating portion 12 in the axial center direction A of the sealing portion 14 is tilted in the orthogonal direction C. As a result, the length of the power storage device 1 in the axial direction A can be shortened.
- the first tilting portion 32 and the second tilting portion 34 that tilt to the opposite sides in the orthogonal direction C are alternately formed in the arrangement direction B, and both tilting portions are formed. A part of is overlapped. Further, the valley folding portion 40 is provided in the first tilting portion 32.
- the power storage device 1 of the present embodiment can be miniaturized while suppressing the deterioration of the sealing property of the electrode body 2, and the mounting efficiency of the power storage device 1, that is, the energy density of the power storage module can be reduced. It can be improved.
- the power storage device 1 of the present embodiment has a pouch structure in which a plurality of electrode bodies 2 are sealed with the film outer body 4, as compared with the case where each electrode body 2 is individually sealed with an outer can.
- the weight of the power storage module can be reduced.
- the number of electrode bodies 2 mounted on the power storage module increases with the increase in capacity of the power storage module, a remarkable weight reduction effect can be obtained.
- the second tilting portion 34 of the present embodiment has a connecting portion with the second connecting portion 30 as the base when viewed from the axial direction A, and the connecting portion connecting the first tilting portion 32 and the second tilting portion 34. It is an isosceles trapezoidal shape with two folding lines 36 as legs. As a result, the total length of the polygonal line generated when the outer edge portion 26 is folded can be further shortened. Therefore, it is possible to further suppress the deterioration of the sealing property of the electrode body 2.
- the power storage device 1 of the present embodiment includes a band-shaped first electrode lead 8 and a second electrode lead 10 that are electrically connected to each electrode body 2 and project from the outer edge portion 26.
- Each electrode lead is arranged so as to pass through a position deviated from the midpoint 36a of the folding line 36, which is a connecting portion connecting the first tilting portion 32 and the second tilting portion 34.
- each electrode lead is arranged so that at least a part thereof passes through the outer end region R when the folding line 36 is divided into four equal parts, or the outside of the overlapping portion 38. As a result, it is possible to further suppress the deterioration of the sealing property of the electrode body 2 due to the folding of the outer edge portion 26.
- This disclosure can be used for a power storage device and a power storage module.
- 1 power storage device 2 electrode body, 4 film exterior body, 12 accommodating part, 14 sealing part, 14a 1st side part, 26 outer edge part, 28 1st connecting part, 30 2nd connecting part, 32 1st tilting part, 34 2nd tilting part, 36 turning line, 36a midpoint, 38 overlapping part, 40 valley folding part, 100 power storage module, 104 holder, 112 side plate.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
図1は、実施の形態1に係る蓄電装置1の斜視図である。図2(A)は、軸心方向Aから見た蓄電装置1の模式図である。図2(B)は、第2方向Cから見た蓄電装置1の模式図である。図2(B)では、説明の便宜上、フィルム外装体4の内部も図示している。また、フィルム外装体4を折り畳む前の状態を破線で図示している。本実施の形態では、電極体2の渦巻きの軸が延びる方向を軸心方向Aとし、複数の電極体2が配列される方向を第1方向B(本開示では配列方向Bという場合もある)とし、軸心方向Aおよび第1方向Bと直交する方向を第2方向C(本開示では直交方向Cという場合もある)とする。
実施の形態2は、蓄電装置1の保持構造を除き、実施の形態1と共通の構成を有する。以下、本実施の形態について実施の形態1と異なる構成を中心に説明し、共通する構成については簡単に説明するか、あるいは説明を省略する。図8は、実施の形態2に係る蓄電モジュール100の斜視図である。図9は、蓄電モジュール100の分解斜視図である。図10は、蓄電モジュール100の断面図である。
図11は、実施の形態3に係る蓄電装置1の斜視図である。図12は、外縁部26が折り畳まれる前の蓄電装置1の斜視図である。なお、図11では、一部の電極体2を破線で図示している。本実施の形態では、電極体2の渦巻きの軸が延びる方向を軸心方向Aとし、複数の電極体2の配列方向を配列方向Bとし、軸心方向Aおよび配列方向Bと直交する方向を直交方向Cとする。
Claims (10)
- 円筒形の複数の電極体と、
複数の前記電極体を個々に包む複数の収容部、および各収容部を封止するとともに複数の前記収容部を互いに連結する封止部を有し、隣り合う前記収容部の間で屈折または湾曲してジグザグに延びるフィルム外装体と、を備える、
蓄電装置。 - 前記封止部は、電極体の軸心方向における各収容部の端部を封止する第1辺部を有し、
前記フィルム外装体は、隣り合う2つの前記収容部に対応する2つの前記第1辺部が互いに交わる方向に延びるように屈折または湾曲する、
請求項1に記載の蓄電装置。 - 前記収容部は、前記フィルム外装体の厚さ方向に膨出しており、
電極体の配列方向および前記軸心方向と直交する方向において、前記収容部は、屈折または湾曲した状態にある前記封止部よりも外側に突出している、
請求項2に記載の蓄電装置。 - 複数の請求項1乃至3のいずれか1項に記載の蓄電装置と、
複数の前記蓄電装置を保持するホルダと、を備える、
蓄電モジュール。 - 前記ホルダは、電極体の配列方向に延びる側板を有し、
前記側板は、前記配列方向に並んで各収容部が嵌まる複数の凹部を有する、
請求項4に記載の蓄電モジュール。 - 前記側板は、前記配列方向に凹凸を繰り返す波板状であるとともに2つの前記蓄電装置で挟まれ、
一方の主表面側から見たときの各凹部に一方の前記蓄電装置の各収容部が嵌まり、前記主表面側から見たときの各凸部に他方の前記蓄電装置の各収容部が裏面側から嵌まる、
請求項5に記載の蓄電モジュール。 - 円筒形の複数の電極体と、
複数の前記電極体を個々に包む複数の収容部、および各収容部を封止するとともに複数の前記収容部を互いに連結する封止部を有し、隣り合う前記収容部の間で折れて前記電極体の配列方向に蛇行するフィルム外装体と、を備え、
前記封止部は、
隣り合う2つの前記収容部に挟まれて当該2つの収容部を連結する第1連結部および第2連結部と、
前記電極体の軸心方向において各収容部より外側で、複数の前記収容部にわたって延びる外縁部と、を有し、
前記第1連結部および前記第2連結部は、前記配列方向に交互に並び、且つ前記軸心方向および前記配列方向と直交する直交方向で互いにずれて、前記配列方向に延び、
前記外縁部は、
前記第1連結部および前記収容部から連続し、前記第1連結部および前記収容部との接続部を起点にして前記直交方向で前記第2連結部側に折れ曲がるとともに、隣り合う前記収容部の間に嵌入する谷折部を有する第1傾倒部と、
前記第2連結部および当該第2連結部を挟んで並ぶ2つの前記第1傾倒部から連続し、前記第2連結部および2つの前記第1傾倒部との接続部を起点にして前記直交方向で前記第1連結部側に折れ曲がる第2傾倒部と、を有し、
前記第1傾倒部および前記第2傾倒部は、前記軸心方向から見て前記収容部上で互いに重なって重畳部を形成する、
蓄電装置。 - 前記第2傾倒部は、前記軸心方向から見て、前記第2連結部との接続部を底辺とし、前記第1傾倒部と前記第2傾倒部との前記接続部である2つの折返し線を脚とする等脚台形状である、
請求項7に記載の蓄電装置。 - 各電極体に電気的に接続されるとともに前記外縁部から突出する帯状の電極リードを備え、
前記電極リードは、前記第1傾倒部と前記第2傾倒部との前記接続部である折返し線の中点からずれた位置を通るように配置される、
請求項7または8に記載の蓄電装置。 - 前記電極リードは、前記折返し線を4等分した際の外端領域を少なくとも一部分が通るか、前記重畳部の外側を通るように配置される、
請求項9に記載の蓄電装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/018,509 US20230291038A1 (en) | 2020-07-30 | 2021-07-29 | Energy storage apparatus and energy storage module |
EP21849352.6A EP4191626A4 (en) | 2020-07-30 | 2021-07-29 | ENERGY STORAGE DEVICE AND ENERGY STORAGE MODULE |
JP2022539564A JPWO2022025186A1 (ja) | 2020-07-30 | 2021-07-29 | |
CN202180058741.3A CN116134568A (zh) | 2020-07-30 | 2021-07-29 | 蓄电装置及蓄电模块 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020-129061 | 2020-07-30 | ||
JP2020129061 | 2020-07-30 | ||
JP2020-164622 | 2020-09-30 | ||
JP2020164622 | 2020-09-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022025186A1 true WO2022025186A1 (ja) | 2022-02-03 |
Family
ID=80036347
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/028107 WO2022025186A1 (ja) | 2020-07-30 | 2021-07-29 | 蓄電装置および蓄電モジュール |
Country Status (5)
Country | Link |
---|---|
US (1) | US20230291038A1 (ja) |
EP (1) | EP4191626A4 (ja) |
JP (1) | JPWO2022025186A1 (ja) |
CN (1) | CN116134568A (ja) |
WO (1) | WO2022025186A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023008445A1 (ja) * | 2021-07-30 | 2023-02-02 | パナソニックIpマネジメント株式会社 | 蓄電モジュール |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003017014A (ja) * | 2001-07-04 | 2003-01-17 | Mitsubishi Chemicals Corp | 電 池 |
JP2004071302A (ja) * | 2002-08-05 | 2004-03-04 | Toyota Motor Corp | 蓄電素子モジュール及びその製造方法 |
JP2010108794A (ja) * | 2008-10-31 | 2010-05-13 | Nec Tokin Corp | ラミネート電池連続体および電池モジュール |
JP2014170613A (ja) | 2011-06-28 | 2014-09-18 | Panasonic Corp | 電池モジュール |
JP2016157518A (ja) * | 2015-02-23 | 2016-09-01 | 昭和電工パッケージング株式会社 | 蓄電デバイス及びその製造方法 |
JP2018524759A (ja) * | 2015-06-18 | 2018-08-30 | 24エム・テクノロジーズ・インコーポレイテッド24M Technologies, Inc. | シングルパウチバッテリセル及びその製造方法 |
US20200112000A1 (en) * | 2018-10-08 | 2020-04-09 | Samsung Sdi Co., Ltd. | Battery pack |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070009787A1 (en) * | 2005-05-12 | 2007-01-11 | Straubel Jeffrey B | Method and apparatus for mounting, cooling, connecting and protecting batteries |
DE102007021309A1 (de) * | 2007-05-07 | 2008-11-13 | Valeo Klimasysteme Gmbh | Antriebsbatteriebaugruppe eines Elktro-, Brennstoffzellen- oder Hybridfahrzeugs |
JP2015185295A (ja) * | 2014-03-24 | 2015-10-22 | パナソニックIpマネジメント株式会社 | 電池モジュール |
US20200052260A1 (en) * | 2018-08-09 | 2020-02-13 | Tiveni MergeCo Inc. | Battery module with foil arranged between battery cells |
-
2021
- 2021-07-29 CN CN202180058741.3A patent/CN116134568A/zh active Pending
- 2021-07-29 EP EP21849352.6A patent/EP4191626A4/en active Pending
- 2021-07-29 JP JP2022539564A patent/JPWO2022025186A1/ja active Pending
- 2021-07-29 US US18/018,509 patent/US20230291038A1/en active Pending
- 2021-07-29 WO PCT/JP2021/028107 patent/WO2022025186A1/ja active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003017014A (ja) * | 2001-07-04 | 2003-01-17 | Mitsubishi Chemicals Corp | 電 池 |
JP2004071302A (ja) * | 2002-08-05 | 2004-03-04 | Toyota Motor Corp | 蓄電素子モジュール及びその製造方法 |
JP2010108794A (ja) * | 2008-10-31 | 2010-05-13 | Nec Tokin Corp | ラミネート電池連続体および電池モジュール |
JP2014170613A (ja) | 2011-06-28 | 2014-09-18 | Panasonic Corp | 電池モジュール |
JP2016157518A (ja) * | 2015-02-23 | 2016-09-01 | 昭和電工パッケージング株式会社 | 蓄電デバイス及びその製造方法 |
JP2018524759A (ja) * | 2015-06-18 | 2018-08-30 | 24エム・テクノロジーズ・インコーポレイテッド24M Technologies, Inc. | シングルパウチバッテリセル及びその製造方法 |
US20200112000A1 (en) * | 2018-10-08 | 2020-04-09 | Samsung Sdi Co., Ltd. | Battery pack |
Non-Patent Citations (1)
Title |
---|
See also references of EP4191626A4 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023008445A1 (ja) * | 2021-07-30 | 2023-02-02 | パナソニックIpマネジメント株式会社 | 蓄電モジュール |
Also Published As
Publication number | Publication date |
---|---|
US20230291038A1 (en) | 2023-09-14 |
JPWO2022025186A1 (ja) | 2022-02-03 |
EP4191626A1 (en) | 2023-06-07 |
CN116134568A (zh) | 2023-05-16 |
EP4191626A4 (en) | 2024-02-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR102303827B1 (ko) | 다수의 전극조립체를 구비하는 복합전극조립체 및 이를 포함하는 전기화학소자 | |
JP6154403B2 (ja) | 非対称構造の電池セル及びこれを含む電池パック | |
JP5592221B2 (ja) | 二次電池 | |
JP6053227B2 (ja) | 単一電極端子結合部を有する電池組合体 | |
KR101421847B1 (ko) | 적층형 전지 및 그 제조 방법 | |
KR102303828B1 (ko) | 전기적으로 연결된 전극조립체들을 구비하는 플렉서블 전기화학소자 | |
JP5448140B2 (ja) | 電池モジュール及びその製造方法 | |
JP6620944B2 (ja) | 直列接続用のラミネート型電池、及び組電池 | |
EP2704229B1 (en) | Secondary battery | |
KR20090093222A (ko) | 전지모듈의 제조방법 및 중대형 전지팩 | |
JP7304330B2 (ja) | 二次電池 | |
WO2022025186A1 (ja) | 蓄電装置および蓄電モジュール | |
WO2019003928A1 (ja) | バスバー及び電池積層体 | |
US20230395920A1 (en) | Electric power storage module | |
WO2022070974A1 (ja) | 蓄電モジュール | |
WO2022091920A1 (ja) | 蓄電モジュール | |
CN113904034B (zh) | 密闭型电池 | |
JP2019091563A (ja) | 蓄電素子 | |
JP7038957B2 (ja) | 電池セルおよび電極リードの製造方法 | |
JP7075580B2 (ja) | ラミネート型電池モジュール | |
JP2022101732A (ja) | 電池モジュールおよびその製造方法 | |
KR20200064737A (ko) | 개선된 전극 탭을 갖는 이차 전지 및 그 제조 방법 | |
US20240222768A1 (en) | Electric power storage module | |
JP2022063685A (ja) | 電池 |
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: 21849352 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022539564 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2021849352 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2021849352 Country of ref document: EP Effective date: 20230228 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |