WO2019059133A1 - Battery pack and method for manufacturing battery pack - Google Patents
Battery pack and method for manufacturing battery pack Download PDFInfo
- Publication number
- WO2019059133A1 WO2019059133A1 PCT/JP2018/034259 JP2018034259W WO2019059133A1 WO 2019059133 A1 WO2019059133 A1 WO 2019059133A1 JP 2018034259 W JP2018034259 W JP 2018034259W WO 2019059133 A1 WO2019059133 A1 WO 2019059133A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery
- wiring board
- flexible printed
- printed wiring
- positive electrode
- Prior art date
Links
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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
- H01M50/50—Current conducting connections for cells or batteries
-
- 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
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
-
- 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
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
-
- 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
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/271—Lids or covers for the racks or secondary casings
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to an assembled battery and a method of manufacturing the assembled battery.
- batteries are used in various applications, and particularly, batteries with large capacities are used in applications such as power sources for electric vehicles and power storage.
- the voltage of the battery may be lower than the voltage required by the device.
- the unit cell can not sufficiently supply the amount of electricity required by the device.
- the present invention has been made in view of such circumstances, and provides an assembled battery having sufficient bonding strength, easy design of the assembled battery, and which can be manufactured at a reduced manufacturing cost.
- the present invention includes a plurality of battery cells and a flexible printed wiring board, each battery cell includes a plate-like terminal extending from the inside of the outer package to the outside, and the plurality of battery cells include the flexible printed circuit
- the flexible printed wiring board is connected in series or in parallel by a wiring board, and the flexible printed wiring board includes a plate-like flying lead portion at least a part of which is connected to the laminated structure of the flexible printed wiring board
- a battery pack characterized in that the surfaces are joined to each other.
- the flexible printed wiring board included in the battery assembly of the present invention includes a plate-like flying lead portion at least a part of which is connected to the laminated structure of the flexible printed wiring board.
- the flying lead portion has a structure in which one end is fixed to the laminated structure of the flexible printed wiring board and the other end is movable. For this reason, it is possible to bend the flying lead portion so that the plate-like terminal extended from the inside to the outside of the exterior body of the battery cell and the flying lead portion overlap. For this reason, it becomes possible to overlap the terminal of a battery cell and a flying lead part, join each surface, and to join by ultrasonic welding, resistance welding, laser welding etc., sufficient joint strength is obtained, and manufacturing cost is also obtained. Can be reduced. Further, after the terminals of the battery cell and the flying lead portion are joined, the flying lead portion can be bent back to the original position, and the design of the assembled battery can be facilitated.
- FIG. 2 is a schematic perspective view of the battery assembly taken along dashed line AA in FIG.
- A is a schematic enlarged view of the assembled battery in the range B enclosed by the broken line in FIG. 2
- (b) is a schematic enlarged view of the assembled battery in the range C surrounded by the dashed line in FIG. 2.
- the battery pack of the present invention includes a plurality of battery cells and a flexible printed wiring board, each battery cell includes a plate-like terminal extending from the inside of the outer package to the outside, and the plurality of battery cells include
- the flexible printed wiring board is connected in series or in parallel, and the flexible printed wiring board includes a plate-like flying lead portion at least a part of which is connected to the laminated structure of the flexible printed wiring board, the terminals and the flying The lead portion is characterized in that the surfaces are joined to each other.
- the flexible printed wiring board has an opening, and the flying lead portion is provided in the opening.
- the opening is preferably formed in a plane excluding the end of the flexible printed wiring board. This makes it possible to miniaturize the assembled battery.
- the flexible printed wiring board preferably has a power line and a battery state detection line, and the flying lead portion is preferably a part of the power line. As a result, the arrangement of the battery cells in the assembled battery is facilitated, and the assembled battery can be miniaturized.
- the power line and the battery state detection line are preferably connected inside the flexible printed wiring board.
- the power line is preferably a metal plate having a thickness of 100 ⁇ m to 300 ⁇ m. As a result, a relatively large current can be supplied to the power line, and the output of the assembled battery can be increased.
- Each battery cell preferably has a flat plate shape, and the plurality of battery cells are preferably stacked in the thickness direction of the battery cell. This makes it possible to miniaturize the assembled battery.
- the battery cell includes an electrode assembly in an outer package, and the electrode assembly has a laminated structure in which at least one positive electrode, at least one negative electrode, and at least one separator are overlapped, and a positive electrode current collector sheet is overlapped from the laminated structure. And a negative electrode extension portion in which a negative electrode current collector sheet is overlapped and extended from the laminated structure, and an end portion of the laminated structure, a joint portion of the terminal and the flying lead portion, It is preferable that the terminal or the exterior body be bent in between. This makes it possible to miniaturize the assembled battery.
- the assembled battery of the present invention preferably includes a plurality of battery groups, and each battery group preferably has a structure in which a plurality of battery cells are stacked in the thickness direction, and a plurality of battery cells included in each battery group Are preferably connected in series or in parallel by the flexible printed wiring board, and a plurality of battery groups are preferably connected by the same flexible printed wiring board. This makes it possible to arrange the plurality of battery cells in several groups, thereby facilitating the design of the assembled battery.
- the two adjacent battery groups are a flexible printed wiring board in which a first portion of a flexible printed wiring board to which a plurality of battery cells included in the first battery group are connected and a plurality of battery cells included in a second battery group
- the second portion of the flexible printed wiring board is disposed to face each other, and an insulating partition wall is preferably provided between the first portion and the second portion of the flexible printed wiring board. This prevents a short circuit from occurring between adjacent battery groups.
- a step of bending a plate-like flying lead portion at least a part of which is connected to a laminated structure of a flexible printed wiring board, a plate-like terminal extending outward from the inside of an exterior body of a battery cell, and a flying lead Provided is a method of manufacturing a battery assembly including the steps of overlapping and joining parts and bending the flying leads. Further, the step of bending back the flying lead portion is preferably a step involving bending of the terminal or the outer package.
- the battery assembly 60 of this embodiment includes a plurality of battery cells 2 and a flexible printed wiring board 3, and each battery cell 2 has plate-like terminals 4 and 5 extending from the inside of the exterior body 16 to the outside.
- the plurality of battery cells 2 are connected in series or in parallel by the flexible printed wiring board 3, and the flexible printed wiring board 3 is a plate-like flying lead in which at least a part is connected to the laminated structure of the flexible printed wiring board 3.
- a portion 6 is provided, and the terminals 4 and 5 and the flying lead portion 6 are characterized in that the surfaces are joined to each other.
- the battery assembly 60 may include battery groups stacked in the thickness direction of the plurality of battery cells. For example, in the battery pack 60 shown in FIGS. 1 and 2, five battery cells 2a to 2e are stacked.
- the assembled battery 60 may have a plurality of battery groups in which a plurality of battery cells 2 are stacked, and the plurality of battery groups may be arranged. For example, in the battery pack 60 shown in FIGS. 7B to 7D, a first battery group in which five battery cells 2 are stacked, a second battery group in which five battery cells 2 are stacked, and A third battery group in which two battery cells 2 are stacked is arranged.
- the battery assembly 60 may include a housing 35 for housing the plurality of battery cells 2.
- the material of the housing 35 can be an insulating material such as plastic.
- the housing 35 may have a partition 36 disposed between the first battery group in which the plurality of battery cells 2 are stacked and the second battery group in which the plurality of battery cells 2 are stacked. . This can suppress shorting between
- the battery cell 2 contained in the assembled battery 60 of this embodiment is a sealed battery.
- a sealed battery is a battery in which an electrolyte is shielded from the open air and has a sealed structure that does not leak during storage or discharge.
- the battery cell 2 may be a secondary battery or a non-aqueous electrolyte secondary battery.
- the battery cell 2 is, for example, a lithium ion battery, a sodium ion battery, a lead storage battery, a nickel hydrogen battery, a nickel cadmium battery or the like.
- the shape of the battery cell 2 may be cylindrical or plate-like, a plate-like battery is preferable.
- the plate-like battery may be a rectangular battery having an exterior such as metal or resin, or a thin battery such as a pouch type battery having an exterior such as a laminate film. Moreover, as a terminal shape, what the plate-shaped terminal extended from the inside of an exterior body to the exterior is preferable.
- the terminal is the positive electrode terminal 4 or the negative electrode terminal 5.
- the shape of the battery cell 2 can be a flat rectangular parallelepiped.
- the battery cell 2 can have wider upper and lower surfaces, and can have four side surfaces around it.
- the positive electrode extension 25 and the negative electrode extension 26 can be provided on the inside of two opposing side surfaces among the four side surfaces.
- the exterior body 16 is a container that accommodates the electrode assembly 12 and the electrolyte 15.
- the material of the exterior body 16 is, for example, a laminate film.
- the exterior body 16 can be provided so as to form a sealed space in which the electrode assembly 12 and the electrolyte 15 are accommodated.
- the battery cell 2 is a pouch type battery.
- the exterior body 16 can have a welded portion in which a laminate film is stacked and welded to the peripheral edge portion.
- the positive electrode side sealing portion 51 in which the laminate film is adhered on both surfaces of the positive electrode terminal 4 and the negative electrode side sealing portion 52 in which the laminate film is adhered on both surfaces of the negative electrode terminal 5 are provided Can.
- the laminate film is, for example, one obtained by laminating a resin film on both sides of a metal film.
- the thickness of the laminate film can be, for example, 50 to 200 ⁇ m.
- the exterior body 16 have a structure in which a laminate film is formed into a bag shape.
- the electrode assembly 12 has a laminated structure 10 in which at least one positive electrode 7, at least one negative electrode 8, and at least one separator 9 are stacked.
- the laminated structure 10 is a portion where the positive electrode 7, the negative electrode 8 and the separator 9 overlap.
- the electrode assembly 12 includes a positive electrode extension portion 25 in which the positive electrode current collector sheet 18 is overlapped and extended from the laminated structure 10 and a negative electrode extension portion 26 in which the negative electrode current collector sheet 22 is overlapped and extended from the laminated structure 10.
- the electrode assembly 12 may have a stacked structure in which a plurality of positive electrodes 7, a plurality of negative electrodes 8, and a separator 9 are stacked.
- the laminated structure 10 is a portion in which a plurality of positive electrodes 7 and a plurality of negative electrodes 8 are alternately stacked via the separators 9.
- the electrode assembly 12 has a stack structure, the electrode assembly 12 has a structure in which the sheet-like positive electrode 7 and the sheet-like negative electrode 8 are alternately stacked with the separator 9 interposed therebetween.
- each stacked positive electrode 7 is a separate positive electrode, and each stacked negative electrode 8 is a separate negative electrode.
- the plurality of positive electrodes 7 included in the electrode assembly 12 may have substantially the same shape, and the plurality of negative electrodes 8 included in the electrode assembly 12 may have substantially the same shape.
- the electrode assembly 12 includes a single folded separator 9 and positive and negative electrodes 7 and 8 disposed in each valley of the separator 9 and alternately disposed with the separator 9 interposed therebetween. it can. Further, separate separators 9 may be disposed between the positive electrode 7 and the negative electrode 8 respectively. The number of stacked layers of the positive electrode 7 or the negative electrode 8 included in the electrode assembly 12 can be appropriately designed in accordance with the required battery capacity.
- the battery cell 2 may have a plurality of electrode assemblies 12.
- the electrode assembly 12 may have a wound structure in which the positive electrode 7, the negative electrode 8, and the separator 9 are stacked and wound. In this case, the laminated structure 10 is a portion where the positive electrode 7, the negative electrode 8 and the separator 9 overlap from the winding axis toward the outer periphery. Further, the electrode assembly 12 may have a flat winding type structure.
- the positive electrode 7 includes a positive electrode current collector sheet 18 and a positive electrode active material layer 19 provided on the positive electrode current collector sheet 18.
- the positive electrode 7 can have a square or rectangular sheet shape.
- the positive electrode 7 can be produced, for example, by forming the positive electrode active material layer 19 on both sides of the rectangular positive electrode current collector sheet 18.
- the positive electrode 7 can have a connection portion (positive electrode current collector sheet 18) connected to the positive electrode side clip 46 or the positive electrode terminal 4, and this connection portion is on both surfaces of the positive electrode current collector sheet 18 at the end of the positive electrode 7. It can be provided by not forming the positive electrode active material layer 19.
- connection portion can be provided by forming an ear portion at one end portion of the positive electrode current collector sheet 18 and not forming the positive electrode active material layer 19 in the ear portion.
- the connection portion extends from the laminated structure 10 of the electrode assembly 12 to constitute a positive electrode extension portion 25.
- the positive electrode current collector sheet 18 is not particularly limited as long as it has electrical conductivity and can be provided with the positive electrode active material layer 19 on the surface, and is, for example, a metal foil. Preferably it is an aluminum foil.
- the thickness of the positive electrode current collector sheet 18 is, for example, 10 ⁇ m to 40 ⁇ m.
- the positive electrode active material layer 19 can be formed on the positive electrode current collector sheet 18 by a coating method or the like by adding a conductive agent, a binder and the like to the positive electrode active material.
- the positive electrode active material is, for example, a lithium transition metal complex oxide capable of reversibly absorbing and desorbing lithium ions.
- the negative electrode 8 includes a negative electrode current collector sheet 22 and a negative electrode active material layer 23 provided on the negative electrode current collector sheet 22.
- the negative electrode 8 can have a square or rectangular sheet shape.
- the negative electrode 8 can be produced, for example, by forming the negative electrode active material layer 23 on both sides of the rectangular negative electrode current collector sheet 22.
- the negative electrode 8 can have a connection portion (negative electrode current collector sheet 22) connected to the negative electrode side clip 47 or the negative electrode terminal 5, and this connection portion is on both surfaces of the negative electrode current collector sheet 22 at the end of the negative electrode 8.
- the negative electrode active material layer 23 can be provided without formation.
- connection portion extends from the laminated structure 10 of the electrode assembly 12 to constitute the negative electrode extension portion 26.
- the negative electrode current collector sheet 22 is not particularly limited as long as it has electrical conductivity and can be provided with the negative electrode active material layer 23 on the surface, and is, for example, a metal foil. Preferably it is copper foil.
- the thickness of the negative electrode current collector sheet 22 is, for example, 10 ⁇ m to 40 ⁇ m.
- the negative electrode active material layer 23 can be formed on the negative electrode current collector sheet 22 by a coating method or the like by adding a conductive agent, a binder and the like to the negative electrode active material.
- the negative electrode active material can be used singly or in combination of graphite, partially graphitized carbon, hard carbon, soft carbon, LiTiO 4 , Sn alloy and the like.
- the positive electrode extension portion 25 is a portion where only the positive electrode current collector sheet 18 extends from the laminated structure 10, and in the positive electrode extension portion 25, the positive electrode active material layer 19 is formed on the positive electrode current collector sheet 18. Absent. In addition, in the positive electrode extension portion 25, the positive electrode current collector sheet 18 is overlapped. The portion extending from the laminated structure 10 may be an edge portion of the positive electrode current collector sheet 18, may be an ear portion provided on the positive electrode current collector sheet 18, or may be a lead attached thereto. Further, the positive electrode extension portion 25 may be a portion where the positive electrode current collector sheet 18 extends from the side surface of the laminated structure 10 or may be an ear portion provided on the positive electrode current collector sheet 18. It may be a lead or the like.
- the positive electrode extension portion 25 is a portion extended from each positive electrode 7 included in the laminated structure 10 so that the positive electrode current collector sheet 18 overlaps.
- the negative electrode 8 and the separator 9 are not disposed between the overlapping positive electrode current collecting sheets 18, so the overlapping positive electrode current collecting sheets 18 can be bundled by the positive electrode side clip 46, and the laminated structure
- Each positive electrode 7 included in 10 and the positive electrode side clip 46 can be electrically connected via the positive electrode extension 25.
- the positive electrode extension portion 25 is a portion extended from the positive electrode 7 included in the spiral laminated structure 10 so that the positive electrode current collector sheet 18 overlaps.
- the negative electrode 8 and the separator 9 are not disposed between the overlapping positive electrode current collecting sheets 18, so the overlapping positive electrode current collecting sheets 18 can be bundled by the positive electrode side clip 46, and the laminated structure
- the positive electrode 7 included in 10 and the positive electrode side clip 46 can be electrically connected via the positive electrode extension 25.
- the positive electrode current collector sheet 18 included in the positive electrode extension portion 25 may be joined to the positive electrode terminal 4 without providing the positive electrode side clip 46.
- the positive electrode terminal 4 and the positive electrode current collector sheet 18 can be overlapped and ultrasonically welded.
- the negative electrode extension portion 26 is a portion where only the negative electrode current collector sheet 22 extends from the laminated structure 10, and the negative electrode active material layer 23 is formed on the negative electrode current collector sheet 22 in the negative electrode extension portion 26. Absent. Further, in the negative electrode extension portion 26, the negative electrode current collecting sheet 22 is overlapped. The portion extending from the laminated structure 10 may be an edge portion of the negative electrode current collector sheet 22, may be an ear portion provided on the negative electrode current collector sheet 22, or may be a lead attached thereto. In addition, the negative electrode extension portion 26 may be a portion where the negative electrode current collector sheet 22 extends from the side surface of the laminated structure 10, or may be an ear portion provided on the positive electrode current collector sheet 18. It may be a lead or the like. The side on which the negative electrode extension 26 is provided may be the side opposite to the side on which the positive electrode extension 25 is provided.
- the negative electrode extension portion 26 is a portion extended from each negative electrode 8 included in the multilayer structure 10 so that the negative electrode current collector sheet 22 overlaps.
- the overlapping negative electrode current collector sheets 22 can be bundled by the negative electrode side clip 47, and a laminated structure Each negative electrode 8 included in 10 and the negative electrode side clip 47 can be electrically connected via the negative electrode extension 26.
- the negative electrode extension portion 26 is a portion extended from the negative electrode 8 included in the spiral laminated structure 10 so that the negative electrode current collector sheet 22 overlaps.
- the overlapping negative electrode current collector sheets 22 can be bundled by the negative electrode side clip 47, and a laminated structure
- the negative electrode 8 included in 10 and the negative electrode side clip 47 can be electrically connected via the negative electrode extension 26.
- the overlapping negative electrode current collector sheet 22 included in the negative electrode extension portion 26 may be joined to the negative electrode terminal 5 without providing the negative electrode side clip 47.
- the negative electrode terminal 5 and the negative electrode current collector sheet 22 can be overlapped and ultrasonically welded.
- the separator 9 is in the form of a sheet, and is disposed between the positive electrode 7 and the negative electrode 8.
- the separator 9 can prevent short circuit current from flowing between the positive electrode 7 and the negative electrode 8 and is not particularly limited as long as the electrolyte can be permeated, but it is, for example, a microporous film of polyolefin or polyethylene. be able to.
- the electrolyte 15 can use carbonates, lactones, ethers, esters etc. as a solvent, and can also be used in mixture of 2 or more types of these solvent. Among these, it is particularly preferable to use a mixture of cyclic carbonate and chain carbonate.
- the electrolyte 15 may be, for example, a lithium salt solute such as LiCF 3 SO 3 , LiAsF 6 , LiClO 4 , LiBF 4 , LiPF 6 , LiPF 6 , LiBOB, LiN (CF 3 SO 2 ) 2 , LiN (C 2 F 5 SO 2 ), etc. It is a solution dissolved in water solvent.
- additives such as VC (vinylene carbonate), PS (propane sultone), VEC (vinyl ethyl carbonate), PRS (propene sultone), FEC (fluoro ethylene carbonate), and flame retardants may be used alone or in combination. You may mix and mix.
- the positive electrode side clip 46 is provided so as to sandwich and bundle a portion (connection portion, positive electrode extension portion 25) where the positive electrode active material layer 19 of the positive electrode current collector sheet 18 is not provided.
- the negative electrode side clip 47 is provided so as to sandwich and bundle a portion (connection portion, negative electrode extension portion 26) where the negative electrode active material layer 23 of the negative electrode current collector sheet 22 is not provided.
- the positive electrode side clip 46 or the negative electrode side clip 47 may be ultrasonically welded and integrated together with the positive electrode current collector sheet 18 or the negative electrode current collector sheet 22 sandwiched and held.
- the positive electrode side clip 46 or the negative electrode side clip 47 can be integrated with the positive electrode current collector sheet 18 or the negative electrode current collector sheet 22 sandwiched and held by ultrasonic welding.
- the positive side clip 46 or the negative side clip 47 is made of a conductive material. As a result, the battery cell 2 can be charged and discharged via the positive electrode side clip 46 or the negative electrode side clip 47.
- the thickness of the metal plate can be, for example, 100 ⁇ m to 500 ⁇ m.
- the positive electrode terminal 4 is a member that is electrically connected to the positive electrode 7 inside the exterior body 16 and becomes a terminal on the positive electrode side of the battery cell 2.
- the portion of the positive electrode terminal 4 located inside the exterior body 16 can be joined to the positive electrode side clip 46 or the positive electrode extension portion 25.
- the positive electrode terminal 4 can be joined to the positive electrode side clip 46 by superposing and welding the positive electrode terminal 4 and the positive electrode side clip 46 to each other.
- the positive electrode terminal 4 can be a metal plate.
- the positive electrode terminal 4 can be made into an aluminum plate.
- the thickness of the positive electrode terminal 4 can be, for example, 100 ⁇ m to 500 ⁇ m.
- the positive electrode terminal 4 and the package 16 can form the positive electrode side sealing portion 51 in which the package 16 is bonded to the positive electrode terminal 4.
- the positive electrode side sealing portion 51 forms a peripheral portion of the package 16 together with the welding portion and the negative electrode side sealing portion 52, and the peripheral portion is an electrode assembly 12, an electrolyte 15, and a positive electrode side inside the package 16.
- the sealed space in which the clip 46 and the negative electrode side clip 47 are disposed is formed.
- a part of the positive electrode terminal 4 can be positioned inside the exterior body 16, and another part of the positive electrode terminal 4 can be positioned outside the exterior body 16. Accordingly, the positive electrode terminal 4 extends from the inside of the exterior body 16 to the outside.
- the positive electrode side sealing portion 51 may be formed by bonding the positive electrode terminal 4 and the outer package 16 via an adhesive layer, or may be formed by welding the outer package 16 to the positive electrode terminal 4.
- the portion of the positive electrode terminal 4 located outside the exterior body 16 is joined to the flying lead portion 6 of the flexible printed wiring board 3. Therefore, electrode assembly 12 arranged in the enclosed space inside package 16 and flexible printed wiring board 3 can be electrically connected via positive electrode terminal 4, and battery cell 2 via positive electrode terminal 4. Can be charged and discharged.
- the shape of the positive electrode terminal 4 can be, for example, plate-like or band-like. In this case, one end of the positive electrode terminal 4 can be joined to the positive electrode side clip 46 or the positive electrode extension portion 25, and the other end of the positive electrode terminal 4 can be joined to the flying lead portion 6. And the positive electrode side sealing part 51 can be provided in-between
- the negative electrode terminal 5 is a member that is electrically connected to the negative electrode 8 inside the exterior body 16 and becomes a terminal on the negative electrode side of the battery cell 2.
- a portion of the negative electrode terminal 5 located inside the exterior body 16 can be joined to the negative electrode side clip 47 or the negative electrode extension portion 26.
- the negative electrode terminal 5 can be joined to the negative electrode side clip 47 by superposing and welding the negative electrode terminal 5 and the negative electrode side clip 47 to each other.
- the negative electrode terminal 5 can be made of a metal plate.
- the negative electrode terminal 5 can be made into a copper plate.
- the thickness of the negative electrode terminal 5 can be, for example, 100 ⁇ m to 500 ⁇ m.
- the negative electrode terminal 5 and the exterior body 16 can form the negative electrode side sealing portion 52 in which the exterior body 16 is bonded to the negative electrode terminal 5.
- the negative electrode side sealing portion 52 forms a peripheral portion of the exterior body 16 together with the welding portion and the positive electrode side sealing portion 51, and the peripheral portion is an electrode assembly 12, an electrolyte 15, a positive electrode side inside the exterior body 16.
- the sealed space in which the clip 46 and the negative electrode side clip 47 are disposed is formed.
- a part of the negative electrode terminal 5 can be located inside the exterior body 16, and another part of the negative electrode terminal 5 can be located outside the exterior body 16. Accordingly, the negative electrode terminal 5 extends from the inside of the exterior body 16 to the outside.
- the negative electrode side sealing portion 52 may be formed by bonding the negative electrode terminal 5 and the exterior body 16 via an adhesive layer, or may be formed by welding the exterior body 16 to the negative electrode terminal 5. A portion of the negative electrode terminal 5 located outside the exterior body 16 is joined to the flying lead portion 6 of the flexible printed wiring board 3. Therefore, the electrode assembly 12 disposed in the sealed space inside the exterior body 16 and the flexible printed wiring board 3 can be electrically connected via the negative electrode terminal 5, and the battery cell 2 via the negative electrode terminal 5. Can be charged and discharged.
- the shape of the negative electrode terminal 5 can be, for example, a strip. In this case, one end of the negative electrode terminal 5 can be joined to the negative electrode side clip 47 or the negative electrode extension portion 26, and the other end of the negative electrode terminal 5 can be joined to the flying lead portion 6. And the negative electrode side sealing part 52 can be provided in-between
- the positive electrode extension portion 25 (positive electrode current collector sheet 18) can have a positive electrode bent portion 30 formed by overlapping and bending the positive electrode current collector sheet 18.
- the negative electrode extension part 26 (negative electrode current collection sheet 22) can have the negative electrode bending part 31 formed by overlapping
- FIG. By providing the positive electrode bent portion 30 and the negative electrode bent portion 31, the portion (positive electrode extension portion 25) where the positive electrode active material layer 19 of the positive electrode current collector sheet 18 is not formed and the negative electrode active material layer 23 of the negative electrode current collector sheet 22.
- the portion (negative electrode extension portion 26) where the portion is not formed can be folded, and the battery cell 2 can be miniaturized.
- the positive electrode bending portion 30 is not particularly limited as long as it is a bending portion provided between the end of the laminated structure 10 and the joint portion 11 of the positive electrode terminal 4 and the flying lead portion 6.
- the positive electrode terminal 4 can be provided so as to be disposed along the side surface on which the positive electrode extension 25 of the structure 10 is provided. Further, the positive electrode bent portion 30 can be provided so that the positive electrode terminal 4 and the flexible printed wiring board 3 overlap. Further, the positive electrode bent portion 30 can be provided such that the positive electrode terminal 4 is disposed along the flexible printed wiring board 3.
- the negative electrode bending portion 30 is not particularly limited as long as it is a bending portion provided between the end of the laminated structure 10 and the bonding portion 11 of the negative electrode terminal 5 and the flying lead portion 6.
- the negative electrode terminal 5 can be provided so as to be disposed along the side surface on which the negative electrode extension portion 26 of the structure 10 is provided.
- the negative electrode bent portion 31 can be provided so that the negative electrode terminal 5 and the flexible printed wiring board 3 overlap.
- the negative electrode bending portion 31 can be provided such that the negative electrode terminal 5 is disposed along the flexible printed wiring board 3.
- the positive electrode extension portion 25 or the negative electrode extension portion 26 of each battery cell 2 is located on the first side of the battery group.
- the plurality of battery cells 2 can be stacked such that the positive electrode extension 25 or the negative electrode extension 26 is positioned on the second side of the battery group.
- the flexible printed wiring board 3 can be arrange
- the battery assembly 60 includes a flexible printed wiring board (FPC) 3 which connects a plurality of battery cells 2 in series or in parallel.
- FPC flexible printed wiring board
- the flexible printed wiring board 3 is a substrate provided with a metal layer in which a wiring pattern is formed on a thin and soft insulating base film 48 (insulating film 44).
- the flexible printed wiring board 3 may be a single-sided FPC in which a metal layer is provided on one side of a base film 48, or may be a double-sided FPC in which a metal layer is provided on both sides of the base film 48, It may be a multilayer FPC in which the base film 48 is stacked.
- the flexible printed wiring board 3 can be provided, for example, as in the developed view of FIG. 4.
- the flexible printed wiring board 3 can have a structure (laminated structure) in which a metal layer is sandwiched between the base film 48 and the cover film 49.
- This metal layer becomes the power line 40 including the flying lead portion 6 and the battery state detection line, here, the voltage detection line 41.
- the metal layer may be connection terminals 42 a and 42 b which are end portions of the power line 40.
- the insulating film 44 (the base film 48 and the cover film 49) is, for example, a polyimide film.
- the material of the metal layer is, for example, copper, aluminum or silver.
- the thickness of the metal layer is, for example, 100 ⁇ m or more and 300 ⁇ m or less.
- a wiring pattern is formed, and includes a power line 40 and a voltage detection line (battery state detection line) 41.
- a metal layer is used as the power line 40, it is preferable that the metal layer have a relatively thick thickness.
- a relatively thick metal plate for the metal layer, a relatively large current can be supplied to the power line 40.
- the flying lead portion 6 also has a relatively thick plate shape, the flying lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 can be easily joined.
- the thickness of the base film 48 or the cover film 49 is, for example, 10 ⁇ m or more and 60 ⁇ m or less.
- an adhesive layer may or may not be provided between the metal layer and the base film 48 or between the metal layer and the cover film 49.
- Power line 40 is a line through which a discharge current and a charge current of battery cell 2 flow among the lines formed on flexible printed wiring board 3.
- Power line 40 can have a pattern such that a plurality of battery cells 2 included in assembled battery 60 can be connected in series or in parallel. Further, the power line 40 can be provided to connect the positive electrode terminal 4 or the negative electrode terminal 5 of at least two battery cells 2 included in the assembled battery 60. Further, the power line 40 has a width wider than that of the voltage detection line 41 because a relatively large current flows.
- the width of the metal plate (metal layer) of the power line 40 is preferably 5 mm to 20 mm.
- the power line 40 has a flying lead 6.
- the insulating film 44 on the upper and lower surfaces of the metal layer is removed, and the metal surface is exposed, so the upper and lower surfaces of the flying lead 6 have conductivity.
- the metal layer of the flying lead 6 may be subjected to surface treatment such as metal plating.
- the flying lead portion 6 has a structure in which at least a part thereof is connected to the laminated structure of the flexible printed wiring board 3. That is, one end of the flying lead 6 is connected to the power line 40 between the base film 48 and the cover film 49, and is fixed to the base film 48 and the cover film 49. The other end of the flying lead 6 is not fixed to the base film 48 and the cover film 49. For this reason, it is possible to bend the flying lead 6 at its root.
- the flying leads 6 can be provided in the openings 45 provided in the flexible printed wiring board 3.
- the opening 45 is preferably provided at a position not protruding from the surface of the flexible printed wiring board 3, and more preferably provided at a position excluding an end in the surface of the flexible printed wiring board.
- the flying lead 6 may have a cantilever structure (cantilever structure).
- the flying lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 of the battery cell 2 are overlapped and joined to form a joint portion 11. Therefore, power line 40 of flexible printed wiring board 3 and battery cell 2 can be electrically connected through flying lead portion 6, and power line 40 connects a plurality of battery cells 2 included in assembled battery 60 in series. Or can be connected in parallel.
- the flying lead portion 6 can be formed in a plate shape having a width of 5 mm to 20 mm. As a result, the flying lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 can be easily stacked and joined. The method of forming the bonding portion 11 will be described later.
- the flexible printed wiring board 3 can have a plurality of flying leads 6.
- the plurality of flying lead portions 6 correspond to and bond to the positive electrode terminal 4 and the negative electrode terminal 5 of the plurality of battery cells 2 included in the assembled battery 60, respectively.
- the power line 40 can have connection terminals 42a, 42b.
- the connection terminals 42 a and 42 b are external connection terminals of the plurality of battery cells 2 connected in series or in parallel by the flexible printed wiring board 3.
- the connection terminals 42 a and 42 b may be connected to the control unit 38. This makes it possible to control the charge and discharge of the assembled battery 60 by the control unit 38.
- the control unit 38 can include a fuse or a relay. As a result, when the control unit 38 detects overcharging or overdischarging of the battery cell 2, the electrical connection between the external connection terminal of the assembled battery 60 and the battery can be disconnected, and the safety of the assembled battery 60 Can be improved.
- connection terminal 42 and the control part 38 may be connected to external wiring.
- the metal layers of the connection terminals 42a and 42b may be subjected to surface treatment such as metal plating.
- a connector in which the flexible printed wiring board 3 is connected to the power line 40 is mounted, and the power line 40 is a control unit It may be connected to 38 or external wiring.
- the voltage detection line (battery state detection line) 41 is a wire for detecting a voltage between the positive electrode terminal 4 and the negative electrode terminal 5 of the battery cell 2 among the wires formed on the flexible printed wiring board 3.
- the voltage detection line 41 can have a pattern capable of detecting the inter-terminal voltage of each battery cell 2 included in the assembled battery 60. Further, the voltage detection line 41 can be connected to the power line 40 so that the control unit 38 can detect the inter-terminal voltage of each battery cell 2. Further, by forming the power lines 40 and the voltage detection lines 41 other than the flying lead portion 6 inside the flexible printed wiring board 3, it is possible to prevent an erroneous contact or an erroneous detection.
- the voltage detection line 41 is provided to electrically connect the power line 40 electrically connecting at least two battery cells 2 to the control unit 38.
- the flexible printed wiring board 3 can have a connector 43 connected to the voltage detection line 41.
- the connector 43 can be connected to the control unit 38. This makes it possible to detect the terminal voltage of each battery cell 2 included in the assembled battery 60 through the voltage detection line 41 and the connector 43, and overcharge and overdischarge of each battery cell 2 during charge and discharge. It becomes possible to detect
- the control unit 38 is, for example, a battery monitoring unit (BMU).
- a voltage detection line is taken as an example of the battery state detection line 41, but this detection line can be used to detect other battery states such as current detection and temperature detection.
- the assembled battery 60 has a battery group in which a plurality of battery cells 2 are stacked, the first side surface of the battery group in which the positive electrode terminal 4 or the negative electrode terminal 5 of each battery cell 2 is vertically aligned, and
- the flexible printed wiring board 3 can be disposed along the second side surface of the battery group in which the positive electrode terminal 4 or the negative electrode terminal 5 is arranged in the vertical direction, and the plurality of flying leads 6 are arranged in the vertical direction. Alternatively, it can be provided to correspond to and bond to the negative electrode terminal 5.
- the plurality of flying lead portions 6 are arranged in the vertical direction corresponding to the positive electrode terminal 4 or the negative electrode terminal 5 arranged in the vertical direction, and are joined to the positive electrode terminal 4 or the negative electrode terminal 5 at the bonding portions 11, respectively.
- one bent flexible printed wiring board 3 can be disposed along the first side surface and the second side surface of the battery group.
- the voltage detection line 41 can be provided on one flexible printed wiring board 3, and it becomes possible to connect the voltage detection line 41 and the control unit 38 with one connector 43.
- the assembled battery 60 can have a structure in which a plurality of connected battery groups of the plurality of battery cells 2 and the flexible printed wiring board 3 are arranged.
- the plurality of battery groups can be arranged so that the flexible printed wiring board 3 is located between two adjacent battery groups.
- a plurality of battery groups can be arranged so that the outlets 26 face each other.
- two flexible printed wiring boards 3 disposed between two adjacent battery groups may be disposed facing each other.
- the flying leads 6 are also disposed facing each other, the insulating partition 36 can be provided between the facing flexible printed wiring boards 3.
- the battery assembly 60 has a structure in which a plurality of battery groups are arranged, it is possible to connect all the battery cells 2 included in the battery assembly 60 with one bent flexible printed wiring board 3.
- the voltage detection line 41 can be provided on one flexible printed wiring board 3, and it becomes possible to connect the voltage detection line 41 and the control unit 38 with one connector 43.
- the flexible printed wiring board 3 has ten flying lead portions 6a to 6j corresponding to the positive electrode terminals 4a to 4e of the first and second side surfaces and the negative electrode terminals 5a to 5e. Further, the positive electrode terminals 4a to 4e or the negative electrode terminals 5a to 5e and the flying lead portions 6a to 6j are joined to form joint portions 11a to 11j. Further, for example, in the case of the battery assembly 60 including the battery cells 2a to 2l shown in FIGS.
- one bent flexible printed wiring board 3 has the battery cells 2a and 2b stacked.
- the battery cells 2a to 2l are disposed along the side surfaces of the first battery group, the side surfaces of the second battery group on which the battery cells 2c to 2g are stacked, and the side surfaces of the third battery group on which the battery cells 2h to 2l are stacked. Are connected in series or in parallel.
- the method of manufacturing assembled battery 60 includes the steps of bending flying lead portion 6 having a cantilever structure of flexible printed wiring board 3, and one of positive electrode terminal 4 and negative electrode terminal 5 of battery cell 2 and flying lead portion 6. And bending the battery cell 2 and bending the flying lead portion 6 back.
- the flexible printed wiring board 3 as shown in the developed view of FIG. 4 is prepared.
- the flying leads 6 included in the flexible printed wiring board 3 are bent as shown in FIGS. 5 (a) and 5 (b).
- the flying lead portion 6 is bent to the side opposite to the battery cell 2 side of the flexible printed wiring board 3 as in the flexible printed wiring board 3 included in the assembled battery 60 of FIG.
- the opening 45 provided with the flying lead portion 6 becomes wide.
- the plurality of pouch type battery cells 2a to 2e are stacked on the flexible printed wiring board 3, and as shown in FIG. 5 (c) and FIG.
- the inserted and bent flying lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 are overlapped.
- the head 54 of the joining unit or welding unit (the ultrasonic horn and anvil in the case of ultrasonic welding) of the overlapping flying lead 6 and the positive electrode terminal 4 or the negative electrode terminal 5.
- the welding lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 are welded to form a joint portion 11.
- a joining device or a welding device for example, an ultrasonic welding device, a resistance welding device or the like can be used.
- the flying lead 6 and the positive electrode terminal 4 or the negative electrode terminal 5 may be joined by laser welding or pressure welding. Further, they may be joined by soldering, brazing, caulking or the like. As described above, by bending the flying lead portion 6, the flying lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 can be easily overlapped, and the bonding operation becomes easy. In this embodiment, it is possible to secure a space for sandwiching the overlapping flying lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 with the head portion 54. In addition, since the main surface of the flying lead portion 6 and the main surface of the positive electrode terminal 4 or the main surface of the negative electrode terminal 5 can be bonded, stronger bonding can be performed.
- the plurality of battery cells 2a to 2e are bent so that the positive electrode bending portion 30 and the negative electrode bending portion 31 are formed, and the plurality of flying lead portions 6a to 6j are bent back as shown in FIG. 5 (e).
- the flexible printed wiring board 3 on the side surface of the battery group in which the plurality of battery cells 2a to 2e are stacked is pulled up.
- the assembled battery 60 as shown in FIG. 6 can be transformed into the assembled battery 60 as shown in FIGS.
- the battery assembly 60 can be miniaturized.
- the assembled battery 60 as shown in FIGS. 1 and 2 can be manufactured.
- a flying lead portion obtained by laminating a plurality of pouch type battery cells 2a to 2l on a flexible printed wiring board 3 as shown in FIG. 6 and the positive electrode terminal 4 or the negative electrode terminal 5 are overlapped.
- the flying lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 are joined to bend the plurality of battery cells 2a to 2l and bend back the plurality of flying lead portions 6 to pull up the flexible printed wiring board 3 on the side surface of the battery group .
- the flexible printed wiring board 3 is bent along the dotted line D and the dotted line E in FIG. 7B so that the flexible printed wiring board 3 is located between two adjacent battery groups.
- the arrangement of the battery groups of the battery cells 2 can be changed. Further, by forming the flexible printed wiring board 3 in a bent structure, the developed length of the flexible printed wiring board 3 can be shortened, and the manufacturing cost of the flexible printed wiring board 3 can be reduced.
- the flexible printed wiring board 3 and the battery cell 2 can be accommodated in the housing 35 to form the assembled battery 60.
- the housing 35 can have partition walls 36a and 36b located between two adjacent battery groups.
- the plurality of battery cells 2 included in the battery group are vertically stacked, but in the thickness direction of the battery cells 2, the battery cells 2 can be stacked in directions other than the vertical direction.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
A battery pack according to the present invention is characterized by comprising a plurality of battery cells and a flexible printed circuit board, wherein: each of the battery cells is provided with a plate-shaped terminal that extends from the inside of an exterior body to the outside; the plurality of battery cells are connected in series or in parallel by the flexible printed circuit board; the flexible printed circuit board is provided with a plate-shaped flying lead part, at least a portion of which is connected to a lamination structure of the flexible printed circuit board; and the surfaces of the terminal and the flying lead part are attached to each other.
Description
本発明は、組電池及び組電池の製造方法に関する。
The present invention relates to an assembled battery and a method of manufacturing the assembled battery.
近年、電池は、様々な用途に用いられ、特に大容量の電池は、電気自動車用電源や電力貯蔵などの用途に用いられている。
電池を単電池で使用すると、機器が必要とする電圧よりも電池の電圧が低い場合がある。このような場合、複数の電池を直列に接続し供給電圧を所望の電圧まで高くする必要がある。また、単電池では機器が必要とする電気量を十分に供給できない場合がある。このような場合、複数の電池を並列に接続し供給電気量を所望の量まで大きくする必要がある。このため、複数の電池を直列又は並列に接続した電池ボックスや組電池を設け、これらから機器に電力を供給している。 In recent years, batteries are used in various applications, and particularly, batteries with large capacities are used in applications such as power sources for electric vehicles and power storage.
When the battery is used as a single battery, the voltage of the battery may be lower than the voltage required by the device. In such a case, it is necessary to connect a plurality of cells in series to increase the supply voltage to a desired voltage. In addition, in some cases, the unit cell can not sufficiently supply the amount of electricity required by the device. In such a case, it is necessary to connect a plurality of batteries in parallel to increase the amount of supplied electricity to a desired amount. For this reason, a battery box or an assembled battery in which a plurality of batteries are connected in series or in parallel is provided, and power is supplied to the device from these.
電池を単電池で使用すると、機器が必要とする電圧よりも電池の電圧が低い場合がある。このような場合、複数の電池を直列に接続し供給電圧を所望の電圧まで高くする必要がある。また、単電池では機器が必要とする電気量を十分に供給できない場合がある。このような場合、複数の電池を並列に接続し供給電気量を所望の量まで大きくする必要がある。このため、複数の電池を直列又は並列に接続した電池ボックスや組電池を設け、これらから機器に電力を供給している。 In recent years, batteries are used in various applications, and particularly, batteries with large capacities are used in applications such as power sources for electric vehicles and power storage.
When the battery is used as a single battery, the voltage of the battery may be lower than the voltage required by the device. In such a case, it is necessary to connect a plurality of cells in series to increase the supply voltage to a desired voltage. In addition, in some cases, the unit cell can not sufficiently supply the amount of electricity required by the device. In such a case, it is necessary to connect a plurality of batteries in parallel to increase the amount of supplied electricity to a desired amount. For this reason, a battery box or an assembled battery in which a plurality of batteries are connected in series or in parallel is provided, and power is supplied to the device from these.
隣接する2つの単電池の端子同士を接合することにより組電池を製造する方法が知られている(例えば、特許文献1参照)。このような形成方法では、直列接続と並列接続が組み合わされたような複雑な組電池を作製する場合、新たな導線を設ける必要があり、製造コストが増加する場合がある。また、各単電池の電圧を検出する検出線を取り付けることが複雑となり、製造コストを増加させる。
フレキシブルプリント配線板(FPC)により複数の単電池を接続する組電池の製造方法が知られている(例えば、特許文献2参照)。FPCを用いることにより、単電池を複雑に接続することが可能になる。また、検出線をFPCに設けることができ、製造コストを低減することができる。 There is known a method of manufacturing an assembled battery by joining terminals of two adjacent single cells (see, for example, Patent Document 1). In such a formation method, in the case of producing a complex battery assembly in which series connection and parallel connection are combined, a new conducting wire needs to be provided, which may increase the manufacturing cost. In addition, it is complicated to attach a detection line for detecting the voltage of each unit cell, which increases the manufacturing cost.
DESCRIPTION OF RELATED ART The manufacturing method of the assembled battery which connects a several cell by a flexible printed wiring board (FPC) is known (for example, refer patent document 2). By using the FPC, it is possible to connect the cells in a complex manner. In addition, the detection line can be provided in the FPC, and the manufacturing cost can be reduced.
フレキシブルプリント配線板(FPC)により複数の単電池を接続する組電池の製造方法が知られている(例えば、特許文献2参照)。FPCを用いることにより、単電池を複雑に接続することが可能になる。また、検出線をFPCに設けることができ、製造コストを低減することができる。 There is known a method of manufacturing an assembled battery by joining terminals of two adjacent single cells (see, for example, Patent Document 1). In such a formation method, in the case of producing a complex battery assembly in which series connection and parallel connection are combined, a new conducting wire needs to be provided, which may increase the manufacturing cost. In addition, it is complicated to attach a detection line for detecting the voltage of each unit cell, which increases the manufacturing cost.
DESCRIPTION OF RELATED ART The manufacturing method of the assembled battery which connects a several cell by a flexible printed wiring board (FPC) is known (for example, refer patent document 2). By using the FPC, it is possible to connect the cells in a complex manner. In addition, the detection line can be provided in the FPC, and the manufacturing cost can be reduced.
FPCにより複数の単電池を接続する従来の組電池の製造方法では、FPCの接続部と、単電池の端子とを半田付けで接続しているため、接合強度が十分でないし、組電池構造が制約されるなどの問題がある。
本発明は、このような事情に鑑みてなされたものであり、十分な接合強度を有し、組電池の設計が容易であり、低減された製造コストで製造できる組電池を提供する。 In the conventional method of manufacturing a battery assembly in which a plurality of single cells are connected by FPC, the connection portion of the FPC and the terminal of the single battery are connected by soldering, so the bonding strength is not sufficient. There are problems such as being restricted.
The present invention has been made in view of such circumstances, and provides an assembled battery having sufficient bonding strength, easy design of the assembled battery, and which can be manufactured at a reduced manufacturing cost.
本発明は、このような事情に鑑みてなされたものであり、十分な接合強度を有し、組電池の設計が容易であり、低減された製造コストで製造できる組電池を提供する。 In the conventional method of manufacturing a battery assembly in which a plurality of single cells are connected by FPC, the connection portion of the FPC and the terminal of the single battery are connected by soldering, so the bonding strength is not sufficient. There are problems such as being restricted.
The present invention has been made in view of such circumstances, and provides an assembled battery having sufficient bonding strength, easy design of the assembled battery, and which can be manufactured at a reduced manufacturing cost.
本発明は、複数の電池セルと、フレキシブルプリント配線板とを備え、各電池セルは、外装体の内部から外部へ延出した板状の端子を備え、前記複数の電池セルは、前記フレキシブルプリント配線板により直列接続又は並列接続され、前記フレキシブルプリント配線板は、少なくとも一部が前記フレキシブルプリント配線板の積層構造とつながっている板状のフライングリード部を備え、前記端子と前記フライングリード部は面同士が接合されていることを特徴とする組電池を提供する。
The present invention includes a plurality of battery cells and a flexible printed wiring board, each battery cell includes a plate-like terminal extending from the inside of the outer package to the outside, and the plurality of battery cells include the flexible printed circuit The flexible printed wiring board is connected in series or in parallel by a wiring board, and the flexible printed wiring board includes a plate-like flying lead portion at least a part of which is connected to the laminated structure of the flexible printed wiring board Provided is a battery pack characterized in that the surfaces are joined to each other.
本発明の組電池に含まれるフレキシブルプリント配線板は、少なくとも一部がフレキシブルプリント配線板の積層構造とつながっている板状のフライングリード部を備える。このフライングリード部は、一方の端がフレキシブルプリント配線板の積層構造に固定され、他方の端が動くことができる構造を有する。このため、電池セルの外装体の内部から外部へ延出した板状の端子とフライングリード部とが重なるように、フライングリード部を折り曲げることが可能である。このため、電池セルの端子とフライングリード部とをそれぞれの面を重ねて超音波溶接、抵抗溶接、レーザー溶接などで接合することが可能になり、十分な接合強度が得られ、また、製造コストを低減することができる。また、電池セルの端子とフライングリード部とを接合した後、フライングリード部を元の位置に曲げ戻すことが可能であり、組電池の設計を容易にすることができる。
The flexible printed wiring board included in the battery assembly of the present invention includes a plate-like flying lead portion at least a part of which is connected to the laminated structure of the flexible printed wiring board. The flying lead portion has a structure in which one end is fixed to the laminated structure of the flexible printed wiring board and the other end is movable. For this reason, it is possible to bend the flying lead portion so that the plate-like terminal extended from the inside to the outside of the exterior body of the battery cell and the flying lead portion overlap. For this reason, it becomes possible to overlap the terminal of a battery cell and a flying lead part, join each surface, and to join by ultrasonic welding, resistance welding, laser welding etc., sufficient joint strength is obtained, and manufacturing cost is also obtained. Can be reduced. Further, after the terminals of the battery cell and the flying lead portion are joined, the flying lead portion can be bent back to the original position, and the design of the assembled battery can be facilitated.
本発明の組電池は、複数の電池セルと、フレキシブルプリント配線板とを備え、各電池セルは、外装体の内部から外部へ延出した板状の端子を備え、前記複数の電池セルは、前記フレキシブルプリント配線板により直列接続又は並列接続され、前記フレキシブルプリント配線板は、少なくとも一部が前記フレキシブルプリント配線板の積層構造とつながっている板状のフライングリード部を備え、前記端子と前記フライングリード部は面同士が接合されていることを特徴とする。
The battery pack of the present invention includes a plurality of battery cells and a flexible printed wiring board, each battery cell includes a plate-like terminal extending from the inside of the outer package to the outside, and the plurality of battery cells include The flexible printed wiring board is connected in series or in parallel, and the flexible printed wiring board includes a plate-like flying lead portion at least a part of which is connected to the laminated structure of the flexible printed wiring board, the terminals and the flying The lead portion is characterized in that the surfaces are joined to each other.
フレキシブルプリント配線板は開口を有し、フライングリード部は、開口中に設けられていることが好ましい。このことにより、フライングリード部はフレキシブルプリント配線板から外側にはみ出すことなく、組電池の小型化ができる。
この開口は、フレキシブルプリント配線板の端部を除く面内に形成されていることが好ましい。このことにより、組電池を小型化することができる。
フレキシブルプリント配線板は、電力線と電池状態検出線とを有し、フライングリード部は、電力線の一部であることが好ましい。このことにより、組電池内の電池セルの配置が容易になり、組電池を小型化することができる。
電力線と電池状態検出線は、フレキシブルプリント配線板内部で接続されていることが好ましい。このことにより、組電池内の電池セルの配置が容易になり、組電池を小型化することができる。
電力線は、100μm以上300μm以下の厚さを有する金属板であることが好ましい。このことにより、電力線に比較的大きな電流を流すことができ、組電池の出力を大きくすることができる。 Preferably, the flexible printed wiring board has an opening, and the flying lead portion is provided in the opening. As a result, the size of the battery assembly can be reduced without protruding the flying lead from the flexible printed wiring board.
The opening is preferably formed in a plane excluding the end of the flexible printed wiring board. This makes it possible to miniaturize the assembled battery.
The flexible printed wiring board preferably has a power line and a battery state detection line, and the flying lead portion is preferably a part of the power line. As a result, the arrangement of the battery cells in the assembled battery is facilitated, and the assembled battery can be miniaturized.
The power line and the battery state detection line are preferably connected inside the flexible printed wiring board. As a result, the arrangement of the battery cells in the assembled battery is facilitated, and the assembled battery can be miniaturized.
The power line is preferably a metal plate having a thickness of 100 μm to 300 μm. As a result, a relatively large current can be supplied to the power line, and the output of the assembled battery can be increased.
この開口は、フレキシブルプリント配線板の端部を除く面内に形成されていることが好ましい。このことにより、組電池を小型化することができる。
フレキシブルプリント配線板は、電力線と電池状態検出線とを有し、フライングリード部は、電力線の一部であることが好ましい。このことにより、組電池内の電池セルの配置が容易になり、組電池を小型化することができる。
電力線と電池状態検出線は、フレキシブルプリント配線板内部で接続されていることが好ましい。このことにより、組電池内の電池セルの配置が容易になり、組電池を小型化することができる。
電力線は、100μm以上300μm以下の厚さを有する金属板であることが好ましい。このことにより、電力線に比較的大きな電流を流すことができ、組電池の出力を大きくすることができる。 Preferably, the flexible printed wiring board has an opening, and the flying lead portion is provided in the opening. As a result, the size of the battery assembly can be reduced without protruding the flying lead from the flexible printed wiring board.
The opening is preferably formed in a plane excluding the end of the flexible printed wiring board. This makes it possible to miniaturize the assembled battery.
The flexible printed wiring board preferably has a power line and a battery state detection line, and the flying lead portion is preferably a part of the power line. As a result, the arrangement of the battery cells in the assembled battery is facilitated, and the assembled battery can be miniaturized.
The power line and the battery state detection line are preferably connected inside the flexible printed wiring board. As a result, the arrangement of the battery cells in the assembled battery is facilitated, and the assembled battery can be miniaturized.
The power line is preferably a metal plate having a thickness of 100 μm to 300 μm. As a result, a relatively large current can be supplied to the power line, and the output of the assembled battery can be increased.
各電池セルは平板形状を有し、複数の電池セルは、電池セルの厚さ方向に積層されていることが好ましい。このことにより、組電池を小型化することができる。
電池セルは、外装体内に電極集合体を備えており、電極集合体は少なくとも1つの正極と少なくとも1つの負極と少なくとも1つのセパレータとが重ねられた積層構造と積層構造から正極集電シートが重なって延出した正極延出部と、積層構造から負極集電シートが重なって延出した負極延出部とを備えており、積層構造の端部と、端子およびフライングリード部の接合部と、の間で端子または外装体が折り曲げられていることが好ましい。このことにより、組電池を小型化することができる。
本発明の組電池は複数の電池グループを備えることが好ましく、各電池グループは、複数の電池セルが厚さ方向に積層された構造を有することが好ましく、各電池グループに含まれる複数の電池セルは、前記フレキシブルプリント配線板により直列接続又は並列接続されることが好ましく、複数の電池グループは、同一のフレキシブルプリント配線板によりつながっていることが好ましい。このことにより、複数の電池セルをいくつかのグループに分けで配置することができるので、組電池の設計が容易になる。
隣接する2つの電池グループは、第1電池グループに含まれる複数の電池セルが接続したフレキシブルプリント配線板の第1部分と、第2電池グループに含まれる複数の電池セルが接続したフレキシブルプリント配線板の第2部分とが対向するように配置されることが好ましく、フレキシブルプリント配線板の第1部分と第2部分との間には、絶縁性の隔壁が設けられていることが好ましい。このことにより、隣接する電池グループ間で短絡が起こることを防げる。 Each battery cell preferably has a flat plate shape, and the plurality of battery cells are preferably stacked in the thickness direction of the battery cell. This makes it possible to miniaturize the assembled battery.
The battery cell includes an electrode assembly in an outer package, and the electrode assembly has a laminated structure in which at least one positive electrode, at least one negative electrode, and at least one separator are overlapped, and a positive electrode current collector sheet is overlapped from the laminated structure. And a negative electrode extension portion in which a negative electrode current collector sheet is overlapped and extended from the laminated structure, and an end portion of the laminated structure, a joint portion of the terminal and the flying lead portion, It is preferable that the terminal or the exterior body be bent in between. This makes it possible to miniaturize the assembled battery.
The assembled battery of the present invention preferably includes a plurality of battery groups, and each battery group preferably has a structure in which a plurality of battery cells are stacked in the thickness direction, and a plurality of battery cells included in each battery group Are preferably connected in series or in parallel by the flexible printed wiring board, and a plurality of battery groups are preferably connected by the same flexible printed wiring board. This makes it possible to arrange the plurality of battery cells in several groups, thereby facilitating the design of the assembled battery.
The two adjacent battery groups are a flexible printed wiring board in which a first portion of a flexible printed wiring board to which a plurality of battery cells included in the first battery group are connected and a plurality of battery cells included in a second battery group Preferably, the second portion of the flexible printed wiring board is disposed to face each other, and an insulating partition wall is preferably provided between the first portion and the second portion of the flexible printed wiring board. This prevents a short circuit from occurring between adjacent battery groups.
電池セルは、外装体内に電極集合体を備えており、電極集合体は少なくとも1つの正極と少なくとも1つの負極と少なくとも1つのセパレータとが重ねられた積層構造と積層構造から正極集電シートが重なって延出した正極延出部と、積層構造から負極集電シートが重なって延出した負極延出部とを備えており、積層構造の端部と、端子およびフライングリード部の接合部と、の間で端子または外装体が折り曲げられていることが好ましい。このことにより、組電池を小型化することができる。
本発明の組電池は複数の電池グループを備えることが好ましく、各電池グループは、複数の電池セルが厚さ方向に積層された構造を有することが好ましく、各電池グループに含まれる複数の電池セルは、前記フレキシブルプリント配線板により直列接続又は並列接続されることが好ましく、複数の電池グループは、同一のフレキシブルプリント配線板によりつながっていることが好ましい。このことにより、複数の電池セルをいくつかのグループに分けで配置することができるので、組電池の設計が容易になる。
隣接する2つの電池グループは、第1電池グループに含まれる複数の電池セルが接続したフレキシブルプリント配線板の第1部分と、第2電池グループに含まれる複数の電池セルが接続したフレキシブルプリント配線板の第2部分とが対向するように配置されることが好ましく、フレキシブルプリント配線板の第1部分と第2部分との間には、絶縁性の隔壁が設けられていることが好ましい。このことにより、隣接する電池グループ間で短絡が起こることを防げる。 Each battery cell preferably has a flat plate shape, and the plurality of battery cells are preferably stacked in the thickness direction of the battery cell. This makes it possible to miniaturize the assembled battery.
The battery cell includes an electrode assembly in an outer package, and the electrode assembly has a laminated structure in which at least one positive electrode, at least one negative electrode, and at least one separator are overlapped, and a positive electrode current collector sheet is overlapped from the laminated structure. And a negative electrode extension portion in which a negative electrode current collector sheet is overlapped and extended from the laminated structure, and an end portion of the laminated structure, a joint portion of the terminal and the flying lead portion, It is preferable that the terminal or the exterior body be bent in between. This makes it possible to miniaturize the assembled battery.
The assembled battery of the present invention preferably includes a plurality of battery groups, and each battery group preferably has a structure in which a plurality of battery cells are stacked in the thickness direction, and a plurality of battery cells included in each battery group Are preferably connected in series or in parallel by the flexible printed wiring board, and a plurality of battery groups are preferably connected by the same flexible printed wiring board. This makes it possible to arrange the plurality of battery cells in several groups, thereby facilitating the design of the assembled battery.
The two adjacent battery groups are a flexible printed wiring board in which a first portion of a flexible printed wiring board to which a plurality of battery cells included in the first battery group are connected and a plurality of battery cells included in a second battery group Preferably, the second portion of the flexible printed wiring board is disposed to face each other, and an insulating partition wall is preferably provided between the first portion and the second portion of the flexible printed wiring board. This prevents a short circuit from occurring between adjacent battery groups.
本発明は、少なくとも一部がフレキシブルプリント配線板の積層構造とつながっている板状のフライングリード部を折り曲げる工程と、電池セルの外装体の内部から外部へ延出した板状の端子とフライングリード部とを重ねて接合する工程と、フライングリード部を曲げ戻す工程とを含む組電池の製造方法を提供する。
また、フライングリード部を曲げ戻す工程は、前記端子または前記外装体の折り曲げを伴う工程であることが好ましい。 In the present invention, a step of bending a plate-like flying lead portion at least a part of which is connected to a laminated structure of a flexible printed wiring board, a plate-like terminal extending outward from the inside of an exterior body of a battery cell, and a flying lead Provided is a method of manufacturing a battery assembly including the steps of overlapping and joining parts and bending the flying leads.
Further, the step of bending back the flying lead portion is preferably a step involving bending of the terminal or the outer package.
また、フライングリード部を曲げ戻す工程は、前記端子または前記外装体の折り曲げを伴う工程であることが好ましい。 In the present invention, a step of bending a plate-like flying lead portion at least a part of which is connected to a laminated structure of a flexible printed wiring board, a plate-like terminal extending outward from the inside of an exterior body of a battery cell, and a flying lead Provided is a method of manufacturing a battery assembly including the steps of overlapping and joining parts and bending the flying leads.
Further, the step of bending back the flying lead portion is preferably a step involving bending of the terminal or the outer package.
以下、図面を用いて本発明の一実施形態を説明する。図面や以下の記述中で示す構成は、例示であって、本発明の範囲は、図面や以下の記述中で示すものに限定されない。
Hereinafter, an embodiment of the present invention will be described using the drawings. The configurations shown in the drawings and the following description are exemplifications, and the scope of the present invention is not limited to those shown in the drawings and the following description.
図1~7は本実施形態の組電池に関する図面であり、詳細は上述の図面の説明と同様である。
本実施形態の組電池60は、複数の電池セル2と、フレキシブルプリント配線板3とを備え、各電池セル2は、外装体16の内部から外部へ延出した板状の端子4、5を備え、複数の電池セル2は、フレキシブルプリント配線板3により直列接続又は並列接続され、フレキシブルプリント配線板3は、少なくとも一部がフレキシブルプリント配線板3の積層構造とつながっている板状のフライングリード部6を備え、端子4、5とフライングリード部6は面同士が接合されていることを特徴とする。
本実施形態の組電池60の製造方法は、少なくとも一部がフレキシブルプリント配線板3の積層構造とつながっている板状のフライングリード部6を折り曲げる工程と、電池セル2の外装体16の内部から外部へ延出した板状の端子4、5とフライングリード部6とを重ねて接合する工程と、フライングリード部6を曲げ戻す工程とを含む。 1 to 7 are drawings related to the battery assembly of the present embodiment, and the details are the same as the description of the above-mentioned drawings.
Thebattery assembly 60 of this embodiment includes a plurality of battery cells 2 and a flexible printed wiring board 3, and each battery cell 2 has plate- like terminals 4 and 5 extending from the inside of the exterior body 16 to the outside. The plurality of battery cells 2 are connected in series or in parallel by the flexible printed wiring board 3, and the flexible printed wiring board 3 is a plate-like flying lead in which at least a part is connected to the laminated structure of the flexible printed wiring board 3. A portion 6 is provided, and the terminals 4 and 5 and the flying lead portion 6 are characterized in that the surfaces are joined to each other.
In the method of manufacturing thebattery pack 60 of the present embodiment, a step of bending the plate-like flying lead portion 6 at least a part of which is connected to the laminated structure of the flexible printed wiring board 3; It includes a step of overlapping and joining the plate- like terminals 4 and 5 extending to the outside and the flying lead portion 6 and a step of bending back the flying lead portion 6.
本実施形態の組電池60は、複数の電池セル2と、フレキシブルプリント配線板3とを備え、各電池セル2は、外装体16の内部から外部へ延出した板状の端子4、5を備え、複数の電池セル2は、フレキシブルプリント配線板3により直列接続又は並列接続され、フレキシブルプリント配線板3は、少なくとも一部がフレキシブルプリント配線板3の積層構造とつながっている板状のフライングリード部6を備え、端子4、5とフライングリード部6は面同士が接合されていることを特徴とする。
本実施形態の組電池60の製造方法は、少なくとも一部がフレキシブルプリント配線板3の積層構造とつながっている板状のフライングリード部6を折り曲げる工程と、電池セル2の外装体16の内部から外部へ延出した板状の端子4、5とフライングリード部6とを重ねて接合する工程と、フライングリード部6を曲げ戻す工程とを含む。 1 to 7 are drawings related to the battery assembly of the present embodiment, and the details are the same as the description of the above-mentioned drawings.
The
In the method of manufacturing the
組電池60は、複数の電池セルの厚さ方向に積層されている電池グループを含んでもよい。例えば、図1、2に示した組電池60では、5つの電池セル2a~2eが積層されている。
また、組電池60は、複数の電池セル2を積層した電池グループを複数有してもよく、この複数の電池グループは並べられていてもよい。例えば、図7(b)~(d)に示した組電池60では、5つの電池セル2が積層された第1電池グループと、5つの電池セル2が積層された第2電池グループと、2つの電池セル2が積層された第3電池グループとが並べられている。
組電池60は、複数の電池セル2を収容する筐体35を備えてもよい。筐体35の材料は、プラスチックなどの絶縁性材料とすることができる。また、筐体35は、複数の電池セル2が積層された第1電池グループと、複数の電池セル2が積層された第2電池グループとの間に配置される隔壁36を有してもよい。このことにより隣接する2つの電池セル2の間で短絡することを抑制することができる。 Thebattery assembly 60 may include battery groups stacked in the thickness direction of the plurality of battery cells. For example, in the battery pack 60 shown in FIGS. 1 and 2, five battery cells 2a to 2e are stacked.
The assembledbattery 60 may have a plurality of battery groups in which a plurality of battery cells 2 are stacked, and the plurality of battery groups may be arranged. For example, in the battery pack 60 shown in FIGS. 7B to 7D, a first battery group in which five battery cells 2 are stacked, a second battery group in which five battery cells 2 are stacked, and A third battery group in which two battery cells 2 are stacked is arranged.
Thebattery assembly 60 may include a housing 35 for housing the plurality of battery cells 2. The material of the housing 35 can be an insulating material such as plastic. In addition, the housing 35 may have a partition 36 disposed between the first battery group in which the plurality of battery cells 2 are stacked and the second battery group in which the plurality of battery cells 2 are stacked. . This can suppress shorting between two adjacent battery cells 2.
また、組電池60は、複数の電池セル2を積層した電池グループを複数有してもよく、この複数の電池グループは並べられていてもよい。例えば、図7(b)~(d)に示した組電池60では、5つの電池セル2が積層された第1電池グループと、5つの電池セル2が積層された第2電池グループと、2つの電池セル2が積層された第3電池グループとが並べられている。
組電池60は、複数の電池セル2を収容する筐体35を備えてもよい。筐体35の材料は、プラスチックなどの絶縁性材料とすることができる。また、筐体35は、複数の電池セル2が積層された第1電池グループと、複数の電池セル2が積層された第2電池グループとの間に配置される隔壁36を有してもよい。このことにより隣接する2つの電池セル2の間で短絡することを抑制することができる。 The
The assembled
The
本実施形態の組電池60に含まれる電池セル2は、密閉型電池であることが好ましい。密閉型電池は、電解質が外気から遮断され、貯蔵中又は放電中に漏液しない密閉構造になっている電池である。電池セル2は、二次電池であってもよく、非水電解質二次電池であってもよい。電池セル2は例えば、リチウムイオン電池、ナトリウムイオン電池、鉛蓄電池、ニッケル・水素電池、ニッケル・カドミウム電池などである。また、電池セル2の形状は円筒状でも板状でも良いが、板状の電池が好ましい。板状の電池は金属や樹脂等の外装を有する角型電池、ラミネートフィルム等の外装を有するパウチ型電池等の薄型電池であってもよい。また、端子形状としては、板状の端子が外装体の内部から外部へ延出したものが好ましい。端子とは、正極端子4又は負極端子5である。
It is preferable that the battery cell 2 contained in the assembled battery 60 of this embodiment is a sealed battery. A sealed battery is a battery in which an electrolyte is shielded from the open air and has a sealed structure that does not leak during storage or discharge. The battery cell 2 may be a secondary battery or a non-aqueous electrolyte secondary battery. The battery cell 2 is, for example, a lithium ion battery, a sodium ion battery, a lead storage battery, a nickel hydrogen battery, a nickel cadmium battery or the like. Moreover, although the shape of the battery cell 2 may be cylindrical or plate-like, a plate-like battery is preferable. The plate-like battery may be a rectangular battery having an exterior such as metal or resin, or a thin battery such as a pouch type battery having an exterior such as a laminate film. Moreover, as a terminal shape, what the plate-shaped terminal extended from the inside of an exterior body to the exterior is preferable. The terminal is the positive electrode terminal 4 or the negative electrode terminal 5.
例えば、電池セル2の形状は、扁平直方体とすることができる。この場合、電池セル2はより広い面である上面及び下面を有することができ、その周りに4つの側面を有することができる。4つの側面のうち対向する2つの側面の内側に正極延出部25及び負極延出部26をそれぞれ設けることができる。
For example, the shape of the battery cell 2 can be a flat rectangular parallelepiped. In this case, the battery cell 2 can have wider upper and lower surfaces, and can have four side surfaces around it. The positive electrode extension 25 and the negative electrode extension 26 can be provided on the inside of two opposing side surfaces among the four side surfaces.
外装体16は、電極集合体12と、電解質15とを収容する容器である。外装体16の材料は、例えば、ラミネートフィルムなどである。外装体16は、電極集合体12と電解質15とを収容する密閉空間を内部に形成するように設けることができる。外装体16の材料がラミネートフィルムである場合、電池セル2は、パウチ型電池である。この場合、外装体16は、その周縁部にラミネートフィルムを重ねて溶着させた溶着部を有することができる。また、外装体16の周縁部に、正極端子4の両面上にラミネートフィルムを接着した正極側封止部51、負極端子5の両面上にラミネートフィルムを接着した負極側封止部52を設けることができる。このように正極端子4、負極端子5を配置することにより、端子4、5が外装体16の内部から外部へ延出した状態となる。ラミネートフィルムは、例えば、金属フィルムの両面上に樹脂フィルムを積層させたものである。ラミネートフィルムの厚さは、例えば50~200μmとすることができる。
外装体16は、ラミネートフィルムを袋状にした構造を有することが好ましい。このことにより、正極折り曲げ部30又は負極折り曲げ部31を形成する際に、外装体16も折りたたむことができ、電池セル2を容易に小型化することができる。 Theexterior body 16 is a container that accommodates the electrode assembly 12 and the electrolyte 15. The material of the exterior body 16 is, for example, a laminate film. The exterior body 16 can be provided so as to form a sealed space in which the electrode assembly 12 and the electrolyte 15 are accommodated. When the material of the exterior body 16 is a laminate film, the battery cell 2 is a pouch type battery. In this case, the exterior body 16 can have a welded portion in which a laminate film is stacked and welded to the peripheral edge portion. Further, the positive electrode side sealing portion 51 in which the laminate film is adhered on both surfaces of the positive electrode terminal 4 and the negative electrode side sealing portion 52 in which the laminate film is adhered on both surfaces of the negative electrode terminal 5 are provided Can. By arranging the positive electrode terminal 4 and the negative electrode terminal 5 in this manner, the terminals 4 and 5 are extended from the inside of the exterior body 16 to the outside. The laminate film is, for example, one obtained by laminating a resin film on both sides of a metal film. The thickness of the laminate film can be, for example, 50 to 200 μm.
It is preferable that theexterior body 16 have a structure in which a laminate film is formed into a bag shape. By this, when forming the positive electrode bending part 30 or the negative electrode bending part 31, the exterior body 16 can also be folded, and the battery cell 2 can be easily miniaturized.
外装体16は、ラミネートフィルムを袋状にした構造を有することが好ましい。このことにより、正極折り曲げ部30又は負極折り曲げ部31を形成する際に、外装体16も折りたたむことができ、電池セル2を容易に小型化することができる。 The
It is preferable that the
電極集合体12は、少なくとも1つの正極7と少なくとも1つの負極8と少なくとも1つのセパレータ9とが重ねられた積層構造10を有する。積層構造10は、正極7と負極8とセパレータ9とが重なった部分である。また、電極集合体12は、積層構造10から正極集電シート18が重なって延出した正極延出部25と、積層構造10から負極集電シート22が重なって延出した負極延出部26とを有する。
電極集合体12は、複数の正極7と複数の負極8とセパレータ9とが重ねられたスタック型構造を有してもよい。この場合、積層構造10は、複数の正極7と複数の負極8とがセパレータ9を介して交互に重ねられた部分である。電極集合体12がスタック構造を有する場合、電極集合体12は、シート状の正極7と、シート状の負極8とをその間にセパレータ9を介在させながら交互に積み重ねた構造を有する。また、積み重ねた各正極7は別々の正極であり、積み重ねた各負極8は別々の負極である。また、電極集合体12に含まれる複数の正極7は実質的に同じ形状を有することができ、電極集合体12に含まれる複数の負極8は実質的に同じ形状を有することができる。例えば、電極集合体12は、つづら折りされた1枚のセパレータ9と、セパレータ9の各谷溝に配置され、かつ、セパレータ9を介して交互に配置された正極7および負極8とを備えることができる。また、正極7と負極8との間にそれぞれ別々のセパレータ9を配置してもよい。なお、電極集合体12に含まれる正極7または負極8の積層数は、必要な電池容量に合わせて適宜設計することができる。また、電池セル2は、複数の電極集合体12を有してもよい。
また、電極集合体12は、正極7と負極8とセパレータ9とを重ねて巻回した巻回型構造を有してもよい。この場合、積層構造10は、巻回軸から外周に向けて正極7と負極8とセパレータ9とが重なった部分である。また、電極集合体12は、扁平形状の巻回型構造を有してもよい。 The electrode assembly 12 has a laminated structure 10 in which at least onepositive electrode 7, at least one negative electrode 8, and at least one separator 9 are stacked. The laminated structure 10 is a portion where the positive electrode 7, the negative electrode 8 and the separator 9 overlap. In addition, the electrode assembly 12 includes a positive electrode extension portion 25 in which the positive electrode current collector sheet 18 is overlapped and extended from the laminated structure 10 and a negative electrode extension portion 26 in which the negative electrode current collector sheet 22 is overlapped and extended from the laminated structure 10. And.
The electrode assembly 12 may have a stacked structure in which a plurality ofpositive electrodes 7, a plurality of negative electrodes 8, and a separator 9 are stacked. In this case, the laminated structure 10 is a portion in which a plurality of positive electrodes 7 and a plurality of negative electrodes 8 are alternately stacked via the separators 9. When the electrode assembly 12 has a stack structure, the electrode assembly 12 has a structure in which the sheet-like positive electrode 7 and the sheet-like negative electrode 8 are alternately stacked with the separator 9 interposed therebetween. Moreover, each stacked positive electrode 7 is a separate positive electrode, and each stacked negative electrode 8 is a separate negative electrode. Also, the plurality of positive electrodes 7 included in the electrode assembly 12 may have substantially the same shape, and the plurality of negative electrodes 8 included in the electrode assembly 12 may have substantially the same shape. For example, the electrode assembly 12 includes a single folded separator 9 and positive and negative electrodes 7 and 8 disposed in each valley of the separator 9 and alternately disposed with the separator 9 interposed therebetween. it can. Further, separate separators 9 may be disposed between the positive electrode 7 and the negative electrode 8 respectively. The number of stacked layers of the positive electrode 7 or the negative electrode 8 included in the electrode assembly 12 can be appropriately designed in accordance with the required battery capacity. Also, the battery cell 2 may have a plurality of electrode assemblies 12.
The electrode assembly 12 may have a wound structure in which thepositive electrode 7, the negative electrode 8, and the separator 9 are stacked and wound. In this case, the laminated structure 10 is a portion where the positive electrode 7, the negative electrode 8 and the separator 9 overlap from the winding axis toward the outer periphery. Further, the electrode assembly 12 may have a flat winding type structure.
電極集合体12は、複数の正極7と複数の負極8とセパレータ9とが重ねられたスタック型構造を有してもよい。この場合、積層構造10は、複数の正極7と複数の負極8とがセパレータ9を介して交互に重ねられた部分である。電極集合体12がスタック構造を有する場合、電極集合体12は、シート状の正極7と、シート状の負極8とをその間にセパレータ9を介在させながら交互に積み重ねた構造を有する。また、積み重ねた各正極7は別々の正極であり、積み重ねた各負極8は別々の負極である。また、電極集合体12に含まれる複数の正極7は実質的に同じ形状を有することができ、電極集合体12に含まれる複数の負極8は実質的に同じ形状を有することができる。例えば、電極集合体12は、つづら折りされた1枚のセパレータ9と、セパレータ9の各谷溝に配置され、かつ、セパレータ9を介して交互に配置された正極7および負極8とを備えることができる。また、正極7と負極8との間にそれぞれ別々のセパレータ9を配置してもよい。なお、電極集合体12に含まれる正極7または負極8の積層数は、必要な電池容量に合わせて適宜設計することができる。また、電池セル2は、複数の電極集合体12を有してもよい。
また、電極集合体12は、正極7と負極8とセパレータ9とを重ねて巻回した巻回型構造を有してもよい。この場合、積層構造10は、巻回軸から外周に向けて正極7と負極8とセパレータ9とが重なった部分である。また、電極集合体12は、扁平形状の巻回型構造を有してもよい。 The electrode assembly 12 has a laminated structure 10 in which at least one
The electrode assembly 12 may have a stacked structure in which a plurality of
The electrode assembly 12 may have a wound structure in which the
正極7は、正極集電シート18と、正極集電シート18上に設けられた正極活物質層19と備える。正極7は、正方形又は長方形のシート形状を有することができる。正極7は、例えば、方形の正極集電シート18の両面上に正極活物質層19を形成することにより作製することができる。正極7は、正極側クリップ46又は正極端子4に接続する接続部(正極集電シート18)を有することができ、この接続部は、正極7の端部の正極集電シート18の両面上に正極活物質層19を形成しないことで設けることができる。また、正極集電シート18の1つの端部に耳部を形成し、該耳部に正極活物質層19を形成しないことで接続部を設けることもできる。この接続部が電極集合体12の積層構造10から延出し、正極延出部25を構成する。
The positive electrode 7 includes a positive electrode current collector sheet 18 and a positive electrode active material layer 19 provided on the positive electrode current collector sheet 18. The positive electrode 7 can have a square or rectangular sheet shape. The positive electrode 7 can be produced, for example, by forming the positive electrode active material layer 19 on both sides of the rectangular positive electrode current collector sheet 18. The positive electrode 7 can have a connection portion (positive electrode current collector sheet 18) connected to the positive electrode side clip 46 or the positive electrode terminal 4, and this connection portion is on both surfaces of the positive electrode current collector sheet 18 at the end of the positive electrode 7. It can be provided by not forming the positive electrode active material layer 19. Alternatively, the connection portion can be provided by forming an ear portion at one end portion of the positive electrode current collector sheet 18 and not forming the positive electrode active material layer 19 in the ear portion. The connection portion extends from the laminated structure 10 of the electrode assembly 12 to constitute a positive electrode extension portion 25.
正極集電シート18は、電気伝導性を有し、表面上に正極活物質層19を備えることができれば、特に限定されないが、例えば、金属箔である。好ましくはアルミニウム箔である。正極集電シート18の厚さは、例えば、10μm~40μmである。
正極活物質層19は、正極活物質に導電剤、結着剤などを添加し、塗布法などにより正極集電シート18の上に形成することができる。正極活物質は、例えば、リチウムイオンを可逆的に吸蔵・放出することが可能なリチウム遷移金属複合酸化物である。具体的には、正極活物質は、LiCoO2、LiNiO2、LiNixCo1-xO2(x=0.01~0.99)、LiMnO2、LiMn2O4、LiCoxMnyNizO2(x+y+z=1)又はオリビン型のLiFePO4やLixFe1-yMyPO4(但し、0.05≦x≦1.2、0≦y≦0.8であり、MはMn、Cr、Co、Cu、Ni、V、Mo、Ti、Zn、Al、Ga、Mg、B、Nbのうち少なくとも1種以上である)などが一種単独もしくは複数種を混合して使用することができる。 The positive electrodecurrent collector sheet 18 is not particularly limited as long as it has electrical conductivity and can be provided with the positive electrode active material layer 19 on the surface, and is, for example, a metal foil. Preferably it is an aluminum foil. The thickness of the positive electrode current collector sheet 18 is, for example, 10 μm to 40 μm.
The positive electrodeactive material layer 19 can be formed on the positive electrode current collector sheet 18 by a coating method or the like by adding a conductive agent, a binder and the like to the positive electrode active material. The positive electrode active material is, for example, a lithium transition metal complex oxide capable of reversibly absorbing and desorbing lithium ions. Specifically, the positive electrode active material is LiCoO 2 , LiNiO 2 , LiNi x Co 1-x O 2 (x = 0.01 to 0.99), LiMnO 2 , LiMn 2 O 4 , LiCo x Mn y Ni z O 2 (x + y + z = 1) or olivine type LiFePO 4 or Li x Fe 1 -yM y PO 4 (where 0.05 ≦ x ≦ 1.2, 0 ≦ y ≦ 0.8, and M is Mn Or at least one or more of Cr, Co, Cu, Ni, V, Mo, Ti, Zn, Al, Ga, Mg, B, Nb, etc.), or the like, which can be used alone or in combination it can.
正極活物質層19は、正極活物質に導電剤、結着剤などを添加し、塗布法などにより正極集電シート18の上に形成することができる。正極活物質は、例えば、リチウムイオンを可逆的に吸蔵・放出することが可能なリチウム遷移金属複合酸化物である。具体的には、正極活物質は、LiCoO2、LiNiO2、LiNixCo1-xO2(x=0.01~0.99)、LiMnO2、LiMn2O4、LiCoxMnyNizO2(x+y+z=1)又はオリビン型のLiFePO4やLixFe1-yMyPO4(但し、0.05≦x≦1.2、0≦y≦0.8であり、MはMn、Cr、Co、Cu、Ni、V、Mo、Ti、Zn、Al、Ga、Mg、B、Nbのうち少なくとも1種以上である)などが一種単独もしくは複数種を混合して使用することができる。 The positive electrode
The positive electrode
負極8は、負極集電シート22と、負極集電シート22上に設けられた負極活物質層23とを備える。負極8は、正方形又は長方形のシート形状を有することができる。負極8は、例えば、方形の負極集電シート22の両面上に負極活物質層23を形成することにより作製することができる。負極8は、負極側クリップ47又は負極端子5に接続する接続部(負極集電シート22)を有することができ、この接続部は、負極8の端部の負極集電シート22の両面上に負極活物質層23を形成しないことで設けることができる。また、負極集電シート22の1つの端部に耳部を形成し、該耳部に負極活物質層23を形成しないことで接続部を設けることもできる。この接続部が電極集合体12の積層構造10から延出し、負極延出部26を構成する。
The negative electrode 8 includes a negative electrode current collector sheet 22 and a negative electrode active material layer 23 provided on the negative electrode current collector sheet 22. The negative electrode 8 can have a square or rectangular sheet shape. The negative electrode 8 can be produced, for example, by forming the negative electrode active material layer 23 on both sides of the rectangular negative electrode current collector sheet 22. The negative electrode 8 can have a connection portion (negative electrode current collector sheet 22) connected to the negative electrode side clip 47 or the negative electrode terminal 5, and this connection portion is on both surfaces of the negative electrode current collector sheet 22 at the end of the negative electrode 8. The negative electrode active material layer 23 can be provided without formation. Further, by forming an ear portion at one end of the negative electrode current collector sheet 22 and not forming the negative electrode active material layer 23 in the ear portion, a connection portion can be provided. This connection portion extends from the laminated structure 10 of the electrode assembly 12 to constitute the negative electrode extension portion 26.
負極集電シート22は、電気伝導性を有し、表面上に負極活物質層23を備えることができれば、特に限定されないが、例えば、金属箔である。好ましくは銅箔である。負極集電シート22の厚さは、例えば、10μm~40μmである。
負極活物質層23は、負極活物質に導電剤、結着剤などを添加し、塗布法などにより負極集電シート22の上に形成することができる。負極活物質は、例えば、リチウムイオン二次電池の場合、グラファイト、部分黒鉛化した炭素、ハードカーボン、ソフトカーボン、LiTiO4、Sn合金等を一種単独もしくは複数種混合して使用することができる。 The negative electrodecurrent collector sheet 22 is not particularly limited as long as it has electrical conductivity and can be provided with the negative electrode active material layer 23 on the surface, and is, for example, a metal foil. Preferably it is copper foil. The thickness of the negative electrode current collector sheet 22 is, for example, 10 μm to 40 μm.
The negative electrodeactive material layer 23 can be formed on the negative electrode current collector sheet 22 by a coating method or the like by adding a conductive agent, a binder and the like to the negative electrode active material. For example, in the case of a lithium ion secondary battery, the negative electrode active material can be used singly or in combination of graphite, partially graphitized carbon, hard carbon, soft carbon, LiTiO 4 , Sn alloy and the like.
負極活物質層23は、負極活物質に導電剤、結着剤などを添加し、塗布法などにより負極集電シート22の上に形成することができる。負極活物質は、例えば、リチウムイオン二次電池の場合、グラファイト、部分黒鉛化した炭素、ハードカーボン、ソフトカーボン、LiTiO4、Sn合金等を一種単独もしくは複数種混合して使用することができる。 The negative electrode
The negative electrode
正極延出部25は、積層構造10から正極集電シート18だけが延出した部分であり、正極延出部25では、正極集電シート18上には、正極活物質層19は形成されていない。また、正極延出部25では、正極集電シート18が重なっている。積層構造10から延出する部分は、正極集電シート18の縁端部であってもよく、正極集電シート18に設けられた耳部であってもよく、取り付けられたリード等でもよい。また、正極延出部25は、積層構造10の側面から正極集電シート18が延出した部分であってもよく、正極集電シート18に設けられた耳部であってもよく、取り付けられたリード等でもよい。
The positive electrode extension portion 25 is a portion where only the positive electrode current collector sheet 18 extends from the laminated structure 10, and in the positive electrode extension portion 25, the positive electrode active material layer 19 is formed on the positive electrode current collector sheet 18. Absent. In addition, in the positive electrode extension portion 25, the positive electrode current collector sheet 18 is overlapped. The portion extending from the laminated structure 10 may be an edge portion of the positive electrode current collector sheet 18, may be an ear portion provided on the positive electrode current collector sheet 18, or may be a lead attached thereto. Further, the positive electrode extension portion 25 may be a portion where the positive electrode current collector sheet 18 extends from the side surface of the laminated structure 10 or may be an ear portion provided on the positive electrode current collector sheet 18. It may be a lead or the like.
電極集合体12がスタック型構造を有する場合、正極延出部25は、積層構造10に含まれる各正極7から正極集電シート18が重なるように延出した部分である。正極延出部25では、重なった正極集電シート18の間には負極8及びセパレータ9は配置されていないので、重なった正極集電シート18を正極側クリップ46で束ねることができ、積層構造10に含まれる各正極7と正極側クリップ46とを正極延出部25を介して電気的に接続することができる。
電極集合体12が巻回構造を有する場合、正極延出部25は、渦巻き状の積層構造10に含まれる正極7から正極集電シート18が重なるように延出した部分である。正極延出部25では、重なった正極集電シート18の間には負極8及びセパレータ9は配置されていないので、重なった正極集電シート18を正極側クリップ46で束ねることができ、積層構造10に含まれる正極7と正極側クリップ46とを正極延出部25を介して電気的に接続することができる。
また、正極側クリップ46を設けずに、正極延出部25に含まれる重なった正極集電シート18を正極端子4に接合させてもよい。例えば、正極端子4と正極集電シート18とを重ねて超音波溶接することができる。 When the electrode assembly 12 has a stack type structure, the positiveelectrode extension portion 25 is a portion extended from each positive electrode 7 included in the laminated structure 10 so that the positive electrode current collector sheet 18 overlaps. In the positive electrode extension portion 25, the negative electrode 8 and the separator 9 are not disposed between the overlapping positive electrode current collecting sheets 18, so the overlapping positive electrode current collecting sheets 18 can be bundled by the positive electrode side clip 46, and the laminated structure Each positive electrode 7 included in 10 and the positive electrode side clip 46 can be electrically connected via the positive electrode extension 25.
When the electrode assembly 12 has a wound structure, the positiveelectrode extension portion 25 is a portion extended from the positive electrode 7 included in the spiral laminated structure 10 so that the positive electrode current collector sheet 18 overlaps. In the positive electrode extension portion 25, the negative electrode 8 and the separator 9 are not disposed between the overlapping positive electrode current collecting sheets 18, so the overlapping positive electrode current collecting sheets 18 can be bundled by the positive electrode side clip 46, and the laminated structure The positive electrode 7 included in 10 and the positive electrode side clip 46 can be electrically connected via the positive electrode extension 25.
Alternatively, the positive electrodecurrent collector sheet 18 included in the positive electrode extension portion 25 may be joined to the positive electrode terminal 4 without providing the positive electrode side clip 46. For example, the positive electrode terminal 4 and the positive electrode current collector sheet 18 can be overlapped and ultrasonically welded.
電極集合体12が巻回構造を有する場合、正極延出部25は、渦巻き状の積層構造10に含まれる正極7から正極集電シート18が重なるように延出した部分である。正極延出部25では、重なった正極集電シート18の間には負極8及びセパレータ9は配置されていないので、重なった正極集電シート18を正極側クリップ46で束ねることができ、積層構造10に含まれる正極7と正極側クリップ46とを正極延出部25を介して電気的に接続することができる。
また、正極側クリップ46を設けずに、正極延出部25に含まれる重なった正極集電シート18を正極端子4に接合させてもよい。例えば、正極端子4と正極集電シート18とを重ねて超音波溶接することができる。 When the electrode assembly 12 has a stack type structure, the positive
When the electrode assembly 12 has a wound structure, the positive
Alternatively, the positive electrode
負極延出部26は、積層構造10から負極集電シート22だけが延出した部分であり、負極延出部26では、負極集電シート22上には、負極活物質層23は形成されていない。また、負極延出部26では、負極集電シート22が重なっている。積層構造10から延出する部分は、負極集電シート22の縁端部であってもよく、負極集電シート22に設けられた耳部であってもよく、取り付けられたリード等でもよい。また、負極延出部26は、積層構造10の側面から負極集電シート22が延出した部分であってもよく、正極集電シート18に設けられた耳部であってもよく、取り付けられたリード等でもよい。負極延出部26が設けられた側面は、正極延出部25が設けられた側面の反対側の側面であってもよい。
The negative electrode extension portion 26 is a portion where only the negative electrode current collector sheet 22 extends from the laminated structure 10, and the negative electrode active material layer 23 is formed on the negative electrode current collector sheet 22 in the negative electrode extension portion 26. Absent. Further, in the negative electrode extension portion 26, the negative electrode current collecting sheet 22 is overlapped. The portion extending from the laminated structure 10 may be an edge portion of the negative electrode current collector sheet 22, may be an ear portion provided on the negative electrode current collector sheet 22, or may be a lead attached thereto. In addition, the negative electrode extension portion 26 may be a portion where the negative electrode current collector sheet 22 extends from the side surface of the laminated structure 10, or may be an ear portion provided on the positive electrode current collector sheet 18. It may be a lead or the like. The side on which the negative electrode extension 26 is provided may be the side opposite to the side on which the positive electrode extension 25 is provided.
電極集合体12がスタック型構造を有する場合、負極延出部26は、積層構造10に含まれる各負極8から負極集電シート22が重なるように延出した部分である。負極延出部26では、重なった負極集電シート22の間には正極7及びセパレータ9は配置されていないので、重なった負極集電シート22を負極側クリップ47で束ねることができ、積層構造10に含まれる各負極8と負極側クリップ47とを負極延出部26を介して電気的に接続することができる。
電極集合体12が巻回構造を有する場合、負極延出部26は、渦巻き状の積層構造10に含まれる負極8から負極集電シート22が重なるように延出した部分である。負極延出部26では、重なった負極集電シート22の間には正極7及びセパレータ9は配置されていないので、重なった負極集電シート22を負極側クリップ47で束ねることができ、積層構造10に含まれる負極8と負極側クリップ47とを負極延出部26を介して電気的に接続することができる。
また、負極側クリップ47を設けずに、負極延出部26に含まれる重なった負極集電シート22を負極端子5に接合させてもよい。例えば、負極端子5と負極集電シート22とを重ねて超音波溶接することができる。 When the electrode assembly 12 has a stack type structure, the negative electrode extension portion 26 is a portion extended from eachnegative electrode 8 included in the multilayer structure 10 so that the negative electrode current collector sheet 22 overlaps. In the negative electrode extension portion 26, since the positive electrode 7 and the separator 9 are not disposed between the overlapping negative electrode current collector sheets 22, the overlapping negative electrode current collector sheets 22 can be bundled by the negative electrode side clip 47, and a laminated structure Each negative electrode 8 included in 10 and the negative electrode side clip 47 can be electrically connected via the negative electrode extension 26.
When the electrode assembly 12 has a wound structure, the negative electrode extension portion 26 is a portion extended from thenegative electrode 8 included in the spiral laminated structure 10 so that the negative electrode current collector sheet 22 overlaps. In the negative electrode extension portion 26, since the positive electrode 7 and the separator 9 are not disposed between the overlapping negative electrode current collector sheets 22, the overlapping negative electrode current collector sheets 22 can be bundled by the negative electrode side clip 47, and a laminated structure The negative electrode 8 included in 10 and the negative electrode side clip 47 can be electrically connected via the negative electrode extension 26.
Alternatively, the overlapping negative electrodecurrent collector sheet 22 included in the negative electrode extension portion 26 may be joined to the negative electrode terminal 5 without providing the negative electrode side clip 47. For example, the negative electrode terminal 5 and the negative electrode current collector sheet 22 can be overlapped and ultrasonically welded.
電極集合体12が巻回構造を有する場合、負極延出部26は、渦巻き状の積層構造10に含まれる負極8から負極集電シート22が重なるように延出した部分である。負極延出部26では、重なった負極集電シート22の間には正極7及びセパレータ9は配置されていないので、重なった負極集電シート22を負極側クリップ47で束ねることができ、積層構造10に含まれる負極8と負極側クリップ47とを負極延出部26を介して電気的に接続することができる。
また、負極側クリップ47を設けずに、負極延出部26に含まれる重なった負極集電シート22を負極端子5に接合させてもよい。例えば、負極端子5と負極集電シート22とを重ねて超音波溶接することができる。 When the electrode assembly 12 has a stack type structure, the negative electrode extension portion 26 is a portion extended from each
When the electrode assembly 12 has a wound structure, the negative electrode extension portion 26 is a portion extended from the
Alternatively, the overlapping negative electrode
セパレータ9は、シート状であり、正極7と負極8との間に配置される。セパレータ9は、正極7と負極8との間に短絡電流が流れることを防止することができ、電解質が透過可能なものであれば特に限定されないが、例えばポリオレフィン又はポリエチレンの微多孔性フィルムとすることができる。
The separator 9 is in the form of a sheet, and is disposed between the positive electrode 7 and the negative electrode 8. The separator 9 can prevent short circuit current from flowing between the positive electrode 7 and the negative electrode 8 and is not particularly limited as long as the electrolyte can be permeated, but it is, for example, a microporous film of polyolefin or polyethylene. be able to.
電解質15は、溶媒としてカーボネート類、ラクトン類、エーテル類、エステル類などを使用することができ、これら溶媒の2種類以上を混合して用いることもできる。これらの中では特に環状カーボネートと鎖状カーボネートを混合して用いることが好ましい。電解質15は、例えば、LiCF3SO3、LiAsF6、LiClO4、LiBF4、LiPF6、LiBOB、LiN(CF3SO2)2、LiN(C2F5SO2)等のリチウム塩溶質を非水溶媒に溶解した溶液である。また、必要に応じてVC(ビニレンカーボネート)、PS(プロパンスルトン)、VEC(ビニルエチルカーボネート)、PRS(プロペンスルトン)、FEC(フルオロエチレンカーボネート)、難燃剤等の添加剤を単独または複数種を混合して配合してもよい。
The electrolyte 15 can use carbonates, lactones, ethers, esters etc. as a solvent, and can also be used in mixture of 2 or more types of these solvent. Among these, it is particularly preferable to use a mixture of cyclic carbonate and chain carbonate. The electrolyte 15 may be, for example, a lithium salt solute such as LiCF 3 SO 3 , LiAsF 6 , LiClO 4 , LiBF 4 , LiPF 6 , LiPF 6 , LiBOB, LiN (CF 3 SO 2 ) 2 , LiN (C 2 F 5 SO 2 ), etc. It is a solution dissolved in water solvent. In addition, if necessary, additives such as VC (vinylene carbonate), PS (propane sultone), VEC (vinyl ethyl carbonate), PRS (propene sultone), FEC (fluoro ethylene carbonate), and flame retardants may be used alone or in combination. You may mix and mix.
正極側クリップ46は、正極集電シート18の正極活物質層19が設けられていない部分(接続部、正極延出部25)を重ねて挟み束ねるように設けられる。また、負極側クリップ47は、負極集電シート22の負極活物質層23が設けられていない部分(接続部、負極延出部26)を重ねて挟み束ねるように設けられる。
正極側クリップ46又は負極側クリップ47は、重ねて挟んだ正極集電シート18又は負極集電シート22と共に超音波溶接され一体化していてもよい。例えば、超音波溶接により正極側クリップ46又は負極側クリップ47と、重ねて挟んだ正極集電シート18又は負極集電シート22とを一体化することができる。 The positiveelectrode side clip 46 is provided so as to sandwich and bundle a portion (connection portion, positive electrode extension portion 25) where the positive electrode active material layer 19 of the positive electrode current collector sheet 18 is not provided. In addition, the negative electrode side clip 47 is provided so as to sandwich and bundle a portion (connection portion, negative electrode extension portion 26) where the negative electrode active material layer 23 of the negative electrode current collector sheet 22 is not provided.
The positiveelectrode side clip 46 or the negative electrode side clip 47 may be ultrasonically welded and integrated together with the positive electrode current collector sheet 18 or the negative electrode current collector sheet 22 sandwiched and held. For example, the positive electrode side clip 46 or the negative electrode side clip 47 can be integrated with the positive electrode current collector sheet 18 or the negative electrode current collector sheet 22 sandwiched and held by ultrasonic welding.
正極側クリップ46又は負極側クリップ47は、重ねて挟んだ正極集電シート18又は負極集電シート22と共に超音波溶接され一体化していてもよい。例えば、超音波溶接により正極側クリップ46又は負極側クリップ47と、重ねて挟んだ正極集電シート18又は負極集電シート22とを一体化することができる。 The positive
The positive
正極側クリップ46又は負極側クリップ47は、導電性を有する材料からなる。このことにより、正極側クリップ46又は負極側クリップ47を介して電池セル2を充放電することができる。正極側クリップ46及び負極側クリップ47が金属板からなる場合、この金属板の厚さは、例えば、100μm~500μmとすることができる。
The positive side clip 46 or the negative side clip 47 is made of a conductive material. As a result, the battery cell 2 can be charged and discharged via the positive electrode side clip 46 or the negative electrode side clip 47. When the positive side clip 46 and the negative side clip 47 are made of a metal plate, the thickness of the metal plate can be, for example, 100 μm to 500 μm.
正極端子4は、外装体16の内部の正極7と電気的に接続し、電池セル2の正極側の端子となる部材である。正極端子4の外装体16の内部に位置する部分は、正極側クリップ46又は正極延出部25に接合することができる。正極端子4は、正極端子4と正極側クリップ46とを重ねて超音波溶接することにより、正極側クリップ46に接合することができる。正極端子4は、金属板とすることができる。また、正極集電シート18、正極側クリップ46の材料がアルミニウムである場合、正極端子4はアルミニウム板とすることができる。正極端子4の厚さは、例えば、100μm~500μmとすることができる。
The positive electrode terminal 4 is a member that is electrically connected to the positive electrode 7 inside the exterior body 16 and becomes a terminal on the positive electrode side of the battery cell 2. The portion of the positive electrode terminal 4 located inside the exterior body 16 can be joined to the positive electrode side clip 46 or the positive electrode extension portion 25. The positive electrode terminal 4 can be joined to the positive electrode side clip 46 by superposing and welding the positive electrode terminal 4 and the positive electrode side clip 46 to each other. The positive electrode terminal 4 can be a metal plate. Moreover, when the material of the positive electrode current collection sheet 18 and the positive electrode side clip 46 is aluminum, the positive electrode terminal 4 can be made into an aluminum plate. The thickness of the positive electrode terminal 4 can be, for example, 100 μm to 500 μm.
正極端子4と外装体16は、外装体16が正極端子4に接着した正極側封止部51を形成することができる。正極側封止部51は、溶着部、負極側封止部52と共に外装体16の周縁部を形成し、この周縁部は、外装体16の内部に、電極集合体12、電解質15、正極側クリップ46及び負極側クリップ47が配置される密閉空間を形成する。また、正極側封止部51を設けることにより、正極端子4の一部が外装体16の内部に位置し、正極端子4の他の一部が外装体16の外部に位置することができる。従って、正極端子4は、外装体16の内部から外部へ延出している。正極側封止部51は、正極端子4と外装体16とを接着層を介して接着して形成してもよく、外装体16を正極端子4に溶着させて形成してもよい。
正極端子4の外装体16の外部に位置する部分は、フレキシブルプリント配線板3のフライングリード部6と接合する。このため、外装体16の内部の密閉空間に配置した電極集合体12とフレキシブルプリント配線板3とを正極端子4を介して電気的に接続することができ、正極端子4を介して電池セル2を充放電することができる。
正極端子4の形状は、例えば、板状、帯状とすることができる。この場合、正極端子4の一方の端が正極側クリップ46又は正極延出部25と接合し、正極端子4の他方の端がフライングリード部6と接合することができる。そして、その間に正極側封止部51を設けることができる。 Thepositive electrode terminal 4 and the package 16 can form the positive electrode side sealing portion 51 in which the package 16 is bonded to the positive electrode terminal 4. The positive electrode side sealing portion 51 forms a peripheral portion of the package 16 together with the welding portion and the negative electrode side sealing portion 52, and the peripheral portion is an electrode assembly 12, an electrolyte 15, and a positive electrode side inside the package 16. The sealed space in which the clip 46 and the negative electrode side clip 47 are disposed is formed. Further, by providing the positive electrode side sealing portion 51, a part of the positive electrode terminal 4 can be positioned inside the exterior body 16, and another part of the positive electrode terminal 4 can be positioned outside the exterior body 16. Accordingly, the positive electrode terminal 4 extends from the inside of the exterior body 16 to the outside. The positive electrode side sealing portion 51 may be formed by bonding the positive electrode terminal 4 and the outer package 16 via an adhesive layer, or may be formed by welding the outer package 16 to the positive electrode terminal 4.
The portion of thepositive electrode terminal 4 located outside the exterior body 16 is joined to the flying lead portion 6 of the flexible printed wiring board 3. Therefore, electrode assembly 12 arranged in the enclosed space inside package 16 and flexible printed wiring board 3 can be electrically connected via positive electrode terminal 4, and battery cell 2 via positive electrode terminal 4. Can be charged and discharged.
The shape of thepositive electrode terminal 4 can be, for example, plate-like or band-like. In this case, one end of the positive electrode terminal 4 can be joined to the positive electrode side clip 46 or the positive electrode extension portion 25, and the other end of the positive electrode terminal 4 can be joined to the flying lead portion 6. And the positive electrode side sealing part 51 can be provided in-between | in-the-meantime.
正極端子4の外装体16の外部に位置する部分は、フレキシブルプリント配線板3のフライングリード部6と接合する。このため、外装体16の内部の密閉空間に配置した電極集合体12とフレキシブルプリント配線板3とを正極端子4を介して電気的に接続することができ、正極端子4を介して電池セル2を充放電することができる。
正極端子4の形状は、例えば、板状、帯状とすることができる。この場合、正極端子4の一方の端が正極側クリップ46又は正極延出部25と接合し、正極端子4の他方の端がフライングリード部6と接合することができる。そして、その間に正極側封止部51を設けることができる。 The
The portion of the
The shape of the
負極端子5は、外装体16の内部の負極8と電気的に接続し、電池セル2の負極側の端子となる部材である。負極端子5の外装体16の内部に位置する部分は、負極側クリップ47又は負極延出部26に接合することができる。負極端子5は、負極端子5と負極側クリップ47とを重ねて超音波溶接することにより、負極側クリップ47に接合することができる。負極端子5は、金属板とすることができる。また、負極集電シート22、負極側クリップ47の材料が銅である場合、負極端子5は銅板とすることができる。負極端子5の厚さは、例えば、100μm~500μmとすることができる。
The negative electrode terminal 5 is a member that is electrically connected to the negative electrode 8 inside the exterior body 16 and becomes a terminal on the negative electrode side of the battery cell 2. A portion of the negative electrode terminal 5 located inside the exterior body 16 can be joined to the negative electrode side clip 47 or the negative electrode extension portion 26. The negative electrode terminal 5 can be joined to the negative electrode side clip 47 by superposing and welding the negative electrode terminal 5 and the negative electrode side clip 47 to each other. The negative electrode terminal 5 can be made of a metal plate. Moreover, when the material of the negative electrode current collection sheet 22 and the negative electrode side clip 47 is copper, the negative electrode terminal 5 can be made into a copper plate. The thickness of the negative electrode terminal 5 can be, for example, 100 μm to 500 μm.
負極端子5と外装体16は、外装体16が負極端子5に接着した負極側封止部52を形成することができる。負極側封止部52は、溶着部、正極側封止部51と共に外装体16の周縁部を形成し、この周縁部は、外装体16の内部に、電極集合体12、電解質15、正極側クリップ46及び負極側クリップ47が配置される密閉空間を形成する。また、負極側封止部52を設けることにより、負極端子5の一部が外装体16の内部に位置し、負極端子5の他の一部が外装体16の外部に位置することができる。従って、負極端子5は、外装体16の内部から外部へ延出している。負極側封止部52は、負極端子5と外装体16とを接着層を介して接着して形成してもよく、外装体16を負極端子5に溶着させて形成してもよい。
負極端子5の外装体16の外部に位置する部分は、フレキシブルプリント配線板3のフライングリード部6と接合する。このため、外装体16の内部の密閉空間に配置した電極集合体12とフレキシブルプリント配線板3とを負極端子5を介して電気的に接続することができ、負極端子5を介して電池セル2を充放電することができる。
負極端子5の形状は、例えば、帯状とすることができる。この場合、負極端子5の一方の端が負極側クリップ47又は負極延出部26と接合し、負極端子5の他方の端がフライングリード部6と接合することができる。そして、その間に負極側封止部52を設けることができる。 Thenegative electrode terminal 5 and the exterior body 16 can form the negative electrode side sealing portion 52 in which the exterior body 16 is bonded to the negative electrode terminal 5. The negative electrode side sealing portion 52 forms a peripheral portion of the exterior body 16 together with the welding portion and the positive electrode side sealing portion 51, and the peripheral portion is an electrode assembly 12, an electrolyte 15, a positive electrode side inside the exterior body 16. The sealed space in which the clip 46 and the negative electrode side clip 47 are disposed is formed. In addition, by providing the negative electrode side sealing portion 52, a part of the negative electrode terminal 5 can be located inside the exterior body 16, and another part of the negative electrode terminal 5 can be located outside the exterior body 16. Accordingly, the negative electrode terminal 5 extends from the inside of the exterior body 16 to the outside. The negative electrode side sealing portion 52 may be formed by bonding the negative electrode terminal 5 and the exterior body 16 via an adhesive layer, or may be formed by welding the exterior body 16 to the negative electrode terminal 5.
A portion of thenegative electrode terminal 5 located outside the exterior body 16 is joined to the flying lead portion 6 of the flexible printed wiring board 3. Therefore, the electrode assembly 12 disposed in the sealed space inside the exterior body 16 and the flexible printed wiring board 3 can be electrically connected via the negative electrode terminal 5, and the battery cell 2 via the negative electrode terminal 5. Can be charged and discharged.
The shape of thenegative electrode terminal 5 can be, for example, a strip. In this case, one end of the negative electrode terminal 5 can be joined to the negative electrode side clip 47 or the negative electrode extension portion 26, and the other end of the negative electrode terminal 5 can be joined to the flying lead portion 6. And the negative electrode side sealing part 52 can be provided in-between | in-the-meantime.
負極端子5の外装体16の外部に位置する部分は、フレキシブルプリント配線板3のフライングリード部6と接合する。このため、外装体16の内部の密閉空間に配置した電極集合体12とフレキシブルプリント配線板3とを負極端子5を介して電気的に接続することができ、負極端子5を介して電池セル2を充放電することができる。
負極端子5の形状は、例えば、帯状とすることができる。この場合、負極端子5の一方の端が負極側クリップ47又は負極延出部26と接合し、負極端子5の他方の端がフライングリード部6と接合することができる。そして、その間に負極側封止部52を設けることができる。 The
A portion of the
The shape of the
正極延出部25(正極集電シート18)は、正極集電シート18を重ねて折り曲げることにより形成された正極折り曲げ部30を有することができる。また、負極延出部26(負極集電シート22)は、負極集電シート22を重ねて折り曲げることにより形成された負極折り曲げ部31を有することができる。正極折り曲げ部30及び負極折り曲げ部31を設けることにより、正極集電シート18の正極活物質層19が形成されていない部分(正極延出部25)及び負極集電シート22の負極活物質層23が形成されていない部分(負極延出部26)を折りたたむことができ、電池セル2を小型化することができる。
The positive electrode extension portion 25 (positive electrode current collector sheet 18) can have a positive electrode bent portion 30 formed by overlapping and bending the positive electrode current collector sheet 18. Moreover, the negative electrode extension part 26 (negative electrode current collection sheet 22) can have the negative electrode bending part 31 formed by overlapping | stacking and bending the negative electrode current collection sheet 22. FIG. By providing the positive electrode bent portion 30 and the negative electrode bent portion 31, the portion (positive electrode extension portion 25) where the positive electrode active material layer 19 of the positive electrode current collector sheet 18 is not formed and the negative electrode active material layer 23 of the negative electrode current collector sheet 22. The portion (negative electrode extension portion 26) where the portion is not formed can be folded, and the battery cell 2 can be miniaturized.
正極折り曲げ部30は、積層構造10の端部から正極端子4とフライングリード部6の接合部11までの間に設けられた折り曲げ部であれば、特に制限はないが、電極集合体12の積層構造10の正極延出部25が設けられた側面に沿って正極端子4が配置されるように設けることができる。また、正極折り曲げ部30は、正極端子4とフレキシブルプリント配線板3とが重なるように設けることができる。また、正極折り曲げ部30は、正極端子4がフレキシブルプリント配線板3に沿って配置されるように設けることができる。このように正極折り曲げ部30を設けることにより、積層構造10とフレキシブルプリント配線板3との間のスペースを狭くすることができ、組電池60を小型化することができる。
The positive electrode bending portion 30 is not particularly limited as long as it is a bending portion provided between the end of the laminated structure 10 and the joint portion 11 of the positive electrode terminal 4 and the flying lead portion 6. The positive electrode terminal 4 can be provided so as to be disposed along the side surface on which the positive electrode extension 25 of the structure 10 is provided. Further, the positive electrode bent portion 30 can be provided so that the positive electrode terminal 4 and the flexible printed wiring board 3 overlap. Further, the positive electrode bent portion 30 can be provided such that the positive electrode terminal 4 is disposed along the flexible printed wiring board 3. By providing the positive electrode bent portion 30 in this manner, the space between the laminated structure 10 and the flexible printed wiring board 3 can be narrowed, and the assembled battery 60 can be miniaturized.
負極折り曲げ部30は、積層構造10の端部から負極端子5とフライングリード部6の接合部11までの間に設けられた折り曲げ部であれば、特に制限はないが、電極集合体12の積層構造10の負極延出部26が設けられた側面に沿って負極端子5が配置されるように設けることができる。また、負極折り曲げ部31は、負極端子5とフレキシブルプリント配線板3とが重なるように設けることができる。また、負極折り曲げ部31は、負極端子5がフレキシブルプリント配線板3に沿って配置されるように設けることができる。このように負極折り曲げ部31を設けることにより、積層構造10とフレキシブルプリント配線板3との間のスペースを狭くすることができ、組電池60を小型化することができる。
The negative electrode bending portion 30 is not particularly limited as long as it is a bending portion provided between the end of the laminated structure 10 and the bonding portion 11 of the negative electrode terminal 5 and the flying lead portion 6. The negative electrode terminal 5 can be provided so as to be disposed along the side surface on which the negative electrode extension portion 26 of the structure 10 is provided. Further, the negative electrode bent portion 31 can be provided so that the negative electrode terminal 5 and the flexible printed wiring board 3 overlap. Further, the negative electrode bending portion 31 can be provided such that the negative electrode terminal 5 is disposed along the flexible printed wiring board 3. By providing the negative electrode bent portion 31 in this manner, the space between the laminated structure 10 and the flexible printed wiring board 3 can be narrowed, and the assembled battery 60 can be miniaturized.
組電池60が複数の電池セル2を積層した電池グループを有する場合、各電池セル2の正極延出部25又は負極延出部26が電池グループの第1側面側に位置し、各電池セル2の正極延出部25又は負極延出部26が電池グループの第2側面側に位置するように、複数の電池セル2を積層することができる。また、電池グループの第1側面及び第2側面に沿うようにフレキシブルプリント配線板3を配置することができる。このことにより、各電池セル2の正極端子4及び負極端子5と、フレキシブルプリント配線板3のフライングリード部6とを容易に接合することができる。
When the assembled battery 60 has a battery group in which a plurality of battery cells 2 are stacked, the positive electrode extension portion 25 or the negative electrode extension portion 26 of each battery cell 2 is located on the first side of the battery group. The plurality of battery cells 2 can be stacked such that the positive electrode extension 25 or the negative electrode extension 26 is positioned on the second side of the battery group. Moreover, the flexible printed wiring board 3 can be arrange | positioned along the 1st side and 2nd side of a battery group. Thus, the positive electrode terminal 4 and the negative electrode terminal 5 of each battery cell 2 and the flying lead portion 6 of the flexible printed wiring board 3 can be easily joined.
組電池60は、複数の電池セル2を直列接続又は並列接続するフレキシブルプリント配線板(FPC)3を備える。フレキシブルプリント配線板3により複数の電池セル2を接続することにより、組電池60に含まれる複数の電池セル2を様々な並べ方で配置することが可能になり、組電池60の形状を様々なスペースに適合させることが可能になる。
フレキシブルプリント配線板3は、薄く柔らかい絶縁性のベースフィルム48(絶縁性フィルム44)上に配線パターンが形成された金属層を設けた基板である。フレキシブルプリント配線板3は、ベースフィルム48の片面上に金属層が設けられた片面FPCであってもよく、ベースフィルム48の両面上にそれぞれ金属層が設けられた両面FPCであってもよく、ベースフィルム48が重ねられた多層FPCであってもよい。フレキシブルプリント配線板3は、例えば、図4の展開図のように設けることができる。 Thebattery assembly 60 includes a flexible printed wiring board (FPC) 3 which connects a plurality of battery cells 2 in series or in parallel. By connecting the plurality of battery cells 2 with the flexible printed wiring board 3, it becomes possible to arrange the plurality of battery cells 2 included in the assembled battery 60 in various ways, and the shape of the assembled battery 60 can be varied It is possible to adapt to
The flexible printedwiring board 3 is a substrate provided with a metal layer in which a wiring pattern is formed on a thin and soft insulating base film 48 (insulating film 44). The flexible printed wiring board 3 may be a single-sided FPC in which a metal layer is provided on one side of a base film 48, or may be a double-sided FPC in which a metal layer is provided on both sides of the base film 48, It may be a multilayer FPC in which the base film 48 is stacked. The flexible printed wiring board 3 can be provided, for example, as in the developed view of FIG. 4.
フレキシブルプリント配線板3は、薄く柔らかい絶縁性のベースフィルム48(絶縁性フィルム44)上に配線パターンが形成された金属層を設けた基板である。フレキシブルプリント配線板3は、ベースフィルム48の片面上に金属層が設けられた片面FPCであってもよく、ベースフィルム48の両面上にそれぞれ金属層が設けられた両面FPCであってもよく、ベースフィルム48が重ねられた多層FPCであってもよい。フレキシブルプリント配線板3は、例えば、図4の展開図のように設けることができる。 The
The flexible printed
フレキシブルプリント配線板3には、電子部品やコネクタ43が実装されていてもよい。また、フレキシブルプリント配線板3は、ベースフィルム48とカバーフィルム49との間に金属層が挟まれた構造(積層構造)を有することができる。この金属層がフライングリード部6を含む電力線40及び電池状態検出線、ここでは、電圧検出線41となる。また、この金属層が電力線40の端部である接続端子42a、42bとなってもよい。絶縁性フィルム44(ベースフィルム48及びカバーフィルム49)は、例えば、ポリイミドフィルムである。また、金属層の材質は、例えば、銅、アルミニウム又は銀である。金属層の厚みは、例えば100μm以上300μm以下である。この金属層には、配線パターンが形成されており、電力線40と電圧検出線(電池状態検出線)41が含まれる。金属層を電力線40として用いる場合は、金属層が比較的厚い厚さを有することが好ましい。金属層に比較的厚い金属板を用いることで電力線40に比較的大きな電流を流すことが可能になる。また、フライングリード部6も比較的厚い板状となるため、フライングリード部6と正極端子4又は負極端子5とを容易に接合することが可能になる。
また、ベースフィルム48又はカバーフィルム49の厚さは、例えば、10μm以上60μm以下である。また、金属層とベースフィルム48との間又は金属層とカバーフィルム49との間に接着層が設けられていてもよく、設けられていなくてもよい。 Electronic components andconnectors 43 may be mounted on the flexible printed wiring board 3. Further, the flexible printed wiring board 3 can have a structure (laminated structure) in which a metal layer is sandwiched between the base film 48 and the cover film 49. This metal layer becomes the power line 40 including the flying lead portion 6 and the battery state detection line, here, the voltage detection line 41. In addition, the metal layer may be connection terminals 42 a and 42 b which are end portions of the power line 40. The insulating film 44 (the base film 48 and the cover film 49) is, for example, a polyimide film. The material of the metal layer is, for example, copper, aluminum or silver. The thickness of the metal layer is, for example, 100 μm or more and 300 μm or less. In the metal layer, a wiring pattern is formed, and includes a power line 40 and a voltage detection line (battery state detection line) 41. When a metal layer is used as the power line 40, it is preferable that the metal layer have a relatively thick thickness. By using a relatively thick metal plate for the metal layer, a relatively large current can be supplied to the power line 40. Further, since the flying lead portion 6 also has a relatively thick plate shape, the flying lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 can be easily joined.
The thickness of thebase film 48 or the cover film 49 is, for example, 10 μm or more and 60 μm or less. In addition, an adhesive layer may or may not be provided between the metal layer and the base film 48 or between the metal layer and the cover film 49.
また、ベースフィルム48又はカバーフィルム49の厚さは、例えば、10μm以上60μm以下である。また、金属層とベースフィルム48との間又は金属層とカバーフィルム49との間に接着層が設けられていてもよく、設けられていなくてもよい。 Electronic components and
The thickness of the
電力線40は、フレキシブルプリント配線板3に形成された配線のうち、電池セル2の放電電流及び充電電流が流れる配線である。電力線40は、組電池60に含まれる複数の電池セル2を直列接続又は並列接続することができるようなパターンを有することができる。また、電力線40は、組電池60に含まれる少なくとも2つの電池セル2の正極端子4又は負極端子5を接続するように設けることができる。また、電力線40は比較的大きな電流が流れるため、電圧検出線41よりも広い幅を有する。電力線40の金属板(金属層)の幅は5mm~20mmが好ましい。
電力線40は、フライングリード部6を有する。フライングリード部6では、金属層の上面上及び下面上の絶縁性フィルム44が除去されており、金属表面が露出しているので、フライングリード部6の上面及び下面は導電性を有する。フライングリード部6の金属層は、金属めっきなどの表面処理が施されていてもよい。フライングリード部6は、少なくとも一部がフレキシブルプリント配線板3の積層構造とつながっている構造を有する。すなわち、フライングリード部6の一方の端は、ベースフィルム48とカバーフィルム49との間の電力線40に繋がっており、ベースフィルム48及びカバーフィルム49に固定されている。フライングリード部6の他方の端は、ベースフィルム48及びカバーフィルム49に固定されていない。このため、フライングリード部6を、その根元で折り曲げることが可能である。組電池を製造する際に、フレキシブルプリント配線板3を折り曲げたり、折り戻したりすると、内部の配線が損傷することがあるが、フライングリード部6だけを折り曲げると、金属板であるので、損傷のおそれはない。
フライングリード部6は、フレキシブルプリント配線板3に設けられた開口45中に設けることができる。開口45は、フレキシブルプリント配線板3の面からはみ出ない位置に設けられることが好ましく、フレキシブルプリント配線板の面内の端部を除く位置に設けられていることがより好ましい。
また、フライングリード部6は、片持ち構造(カンチレバー構造)を有してもよい。Power line 40 is a line through which a discharge current and a charge current of battery cell 2 flow among the lines formed on flexible printed wiring board 3. Power line 40 can have a pattern such that a plurality of battery cells 2 included in assembled battery 60 can be connected in series or in parallel. Further, the power line 40 can be provided to connect the positive electrode terminal 4 or the negative electrode terminal 5 of at least two battery cells 2 included in the assembled battery 60. Further, the power line 40 has a width wider than that of the voltage detection line 41 because a relatively large current flows. The width of the metal plate (metal layer) of the power line 40 is preferably 5 mm to 20 mm.
Thepower line 40 has a flying lead 6. In the flying lead 6, the insulating film 44 on the upper and lower surfaces of the metal layer is removed, and the metal surface is exposed, so the upper and lower surfaces of the flying lead 6 have conductivity. The metal layer of the flying lead 6 may be subjected to surface treatment such as metal plating. The flying lead portion 6 has a structure in which at least a part thereof is connected to the laminated structure of the flexible printed wiring board 3. That is, one end of the flying lead 6 is connected to the power line 40 between the base film 48 and the cover film 49, and is fixed to the base film 48 and the cover film 49. The other end of the flying lead 6 is not fixed to the base film 48 and the cover film 49. For this reason, it is possible to bend the flying lead 6 at its root. If the flexible printed wiring board 3 is bent or folded back when manufacturing the assembled battery, the internal wiring may be damaged. However, if only the flying lead portion 6 is bent, it is a metal plate. There is no fear.
The flying leads 6 can be provided in theopenings 45 provided in the flexible printed wiring board 3. The opening 45 is preferably provided at a position not protruding from the surface of the flexible printed wiring board 3, and more preferably provided at a position excluding an end in the surface of the flexible printed wiring board.
The flyinglead 6 may have a cantilever structure (cantilever structure).
電力線40は、フライングリード部6を有する。フライングリード部6では、金属層の上面上及び下面上の絶縁性フィルム44が除去されており、金属表面が露出しているので、フライングリード部6の上面及び下面は導電性を有する。フライングリード部6の金属層は、金属めっきなどの表面処理が施されていてもよい。フライングリード部6は、少なくとも一部がフレキシブルプリント配線板3の積層構造とつながっている構造を有する。すなわち、フライングリード部6の一方の端は、ベースフィルム48とカバーフィルム49との間の電力線40に繋がっており、ベースフィルム48及びカバーフィルム49に固定されている。フライングリード部6の他方の端は、ベースフィルム48及びカバーフィルム49に固定されていない。このため、フライングリード部6を、その根元で折り曲げることが可能である。組電池を製造する際に、フレキシブルプリント配線板3を折り曲げたり、折り戻したりすると、内部の配線が損傷することがあるが、フライングリード部6だけを折り曲げると、金属板であるので、損傷のおそれはない。
フライングリード部6は、フレキシブルプリント配線板3に設けられた開口45中に設けることができる。開口45は、フレキシブルプリント配線板3の面からはみ出ない位置に設けられることが好ましく、フレキシブルプリント配線板の面内の端部を除く位置に設けられていることがより好ましい。
また、フライングリード部6は、片持ち構造(カンチレバー構造)を有してもよい。
The
The flying leads 6 can be provided in the
The flying
フライングリード部6と電池セル2の正極端子4又は負極端子5とは、重ねて接合され接合部11を形成する。このため、フライングリード部6を介してフレキシブルプリント配線板3の電力線40と電池セル2とを電気的に接続することができ、電力線40により組電池60に含まれる複数の電池セル2を直列接続又は並列接続することができる。また、フライングリード部6は、幅5mm~20mmの板状とすることができる。このことにより、フライングリード部6と正極端子4又は負極端子5とを容易に重ねて接合することができる。接合部11の形成方法については後述する。
フレキシブルプリント配線板3は、複数のフライングリード部6を有することができる。複数のフライングリード部6は、それぞれ組電池60に含まれる複数の電池セル2の正極端子4及び負極端子5に対応し接合する。 The flyinglead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 of the battery cell 2 are overlapped and joined to form a joint portion 11. Therefore, power line 40 of flexible printed wiring board 3 and battery cell 2 can be electrically connected through flying lead portion 6, and power line 40 connects a plurality of battery cells 2 included in assembled battery 60 in series. Or can be connected in parallel. In addition, the flying lead portion 6 can be formed in a plate shape having a width of 5 mm to 20 mm. As a result, the flying lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 can be easily stacked and joined. The method of forming the bonding portion 11 will be described later.
The flexible printedwiring board 3 can have a plurality of flying leads 6. The plurality of flying lead portions 6 correspond to and bond to the positive electrode terminal 4 and the negative electrode terminal 5 of the plurality of battery cells 2 included in the assembled battery 60, respectively.
フレキシブルプリント配線板3は、複数のフライングリード部6を有することができる。複数のフライングリード部6は、それぞれ組電池60に含まれる複数の電池セル2の正極端子4及び負極端子5に対応し接合する。 The flying
The flexible printed
電力線40は、接続端子42a、42bを有することができる。接続端子42a、42bは、フレキシブルプリント配線板3により直列接続又は並列接続された複数の電池セル2の外部接続端子である。接続端子42a、42bは、制御部38に接続してもよい。このことにより、組電池60の充放電を制御部38で制御することが可能になる。制御部38は、ヒューズ又はリレーを備えることができる。このことにより、制御部38が電池セル2の過充電や過放電を検出した際に、組電池60の外部接続端子と電池との電気的接続を切断することができ、組電池60の安全性を向上させることができる。接続端子42と制御部38の固定には、特に制限はないが、例えば、ネジ止めを用いることができる。
また、接続端子42a、42bは、外部配線に接続してもよい。接続端子42a、42bの金属層は、金属めっきなどの表面処理が施されていてもよい。ここでは、電力線40の一部が接続端子42となっている場合について説明しているが、フレキシブルプリント配線板3が電力線40に接続したコネクタを搭載し、このコネクタを介して電力線40が制御部38や外部配線と接続してもよい。 Thepower line 40 can have connection terminals 42a, 42b. The connection terminals 42 a and 42 b are external connection terminals of the plurality of battery cells 2 connected in series or in parallel by the flexible printed wiring board 3. The connection terminals 42 a and 42 b may be connected to the control unit 38. This makes it possible to control the charge and discharge of the assembled battery 60 by the control unit 38. The control unit 38 can include a fuse or a relay. As a result, when the control unit 38 detects overcharging or overdischarging of the battery cell 2, the electrical connection between the external connection terminal of the assembled battery 60 and the battery can be disconnected, and the safety of the assembled battery 60 Can be improved. Although there is no restriction | limiting in particular in fixation of the connection terminal 42 and the control part 38, For example, screwing can be used.
Also, the connection terminals 42a and 42b may be connected to external wiring. The metal layers of the connection terminals 42a and 42b may be subjected to surface treatment such as metal plating. Here, although the case where a part of the power line 40 is the connection terminal 42 is described, a connector in which the flexible printed wiring board 3 is connected to the power line 40 is mounted, and the power line 40 is a control unit It may be connected to 38 or external wiring.
また、接続端子42a、42bは、外部配線に接続してもよい。接続端子42a、42bの金属層は、金属めっきなどの表面処理が施されていてもよい。ここでは、電力線40の一部が接続端子42となっている場合について説明しているが、フレキシブルプリント配線板3が電力線40に接続したコネクタを搭載し、このコネクタを介して電力線40が制御部38や外部配線と接続してもよい。 The
Also, the
電圧検出線(電池状態検出線)41は、フレキシブルプリント配線板3に形成された配線のうち、電池セル2の正極端子4と負極端子5との間の電圧を検出するための配線である。電圧検出線41は、組電池60に含まれる各電池セル2の端子間電圧を検出できるようなパターンを有することができる。また、電圧検出線41は、制御部38により各電池セル2の端子間電圧を検出できるように電力線40に接続することができる。また、フライングリード部6以外の電力線40及び電圧検出線41をフレキシブルプリント配線板3の内部に形成することにより、誤接触や誤検出を防止することができる。また、電圧検出線41は、少なくとも2つの電池セル2を電気的に接続する電力線40と制御部38とを電気的に接続するように設けられる。また、電圧検出線41には比較的小さな電流しか流れないため、電力線40よりも狭い幅を有する。
フレキシブルプリント配線板3は、電圧検出線41に接続したコネクタ43を有することができる。このコネクタ43は、制御部38に接続することができる。このことにより、電圧検出線41及びコネクタ43を介して組電池60に含まれる各電池セル2の端子電圧を検出することが可能になり、充放電時における各電池セル2の過充電、過放電を検出することが可能になる。制御部38は、例えば、電池監視ユニット(BMU)である。
この実施形態では、電池状態検出線41として電圧検出線を例に挙げているが、この検出線を電流検出や温度検出など他の電池状態を検出するために利用することができる。 The voltage detection line (battery state detection line) 41 is a wire for detecting a voltage between thepositive electrode terminal 4 and the negative electrode terminal 5 of the battery cell 2 among the wires formed on the flexible printed wiring board 3. The voltage detection line 41 can have a pattern capable of detecting the inter-terminal voltage of each battery cell 2 included in the assembled battery 60. Further, the voltage detection line 41 can be connected to the power line 40 so that the control unit 38 can detect the inter-terminal voltage of each battery cell 2. Further, by forming the power lines 40 and the voltage detection lines 41 other than the flying lead portion 6 inside the flexible printed wiring board 3, it is possible to prevent an erroneous contact or an erroneous detection. In addition, the voltage detection line 41 is provided to electrically connect the power line 40 electrically connecting at least two battery cells 2 to the control unit 38. In addition, since only a relatively small current flows in the voltage detection line 41, the width is smaller than that of the power line 40.
The flexible printedwiring board 3 can have a connector 43 connected to the voltage detection line 41. The connector 43 can be connected to the control unit 38. This makes it possible to detect the terminal voltage of each battery cell 2 included in the assembled battery 60 through the voltage detection line 41 and the connector 43, and overcharge and overdischarge of each battery cell 2 during charge and discharge. It becomes possible to detect The control unit 38 is, for example, a battery monitoring unit (BMU).
In this embodiment, a voltage detection line is taken as an example of the batterystate detection line 41, but this detection line can be used to detect other battery states such as current detection and temperature detection.
フレキシブルプリント配線板3は、電圧検出線41に接続したコネクタ43を有することができる。このコネクタ43は、制御部38に接続することができる。このことにより、電圧検出線41及びコネクタ43を介して組電池60に含まれる各電池セル2の端子電圧を検出することが可能になり、充放電時における各電池セル2の過充電、過放電を検出することが可能になる。制御部38は、例えば、電池監視ユニット(BMU)である。
この実施形態では、電池状態検出線41として電圧検出線を例に挙げているが、この検出線を電流検出や温度検出など他の電池状態を検出するために利用することができる。 The voltage detection line (battery state detection line) 41 is a wire for detecting a voltage between the
The flexible printed
In this embodiment, a voltage detection line is taken as an example of the battery
組電池60が複数の電池セル2が積層された電池グループを有する場合、各電池セル2の正極端子4又は負極端子5が上下方向に並んだ電池グループの第1側面、及び各電池セル2の正極端子4又は負極端子5が上下方向に並んだ電池グループの第2側面に沿ってフレキシブルプリント配線板3を配置することができ、複数のフライングリード部6は、上下方向に並んだ正極端子4又は負極端子5に対応し接合するように設けることができる。この場合、複数のフライングリード部6は、上下方向に並んだ正極端子4又は負極端子5に対応して、上下方向に並び、それぞれ接合部11において正極端子4又は負極端子5と接合する。また、折り曲げられた1枚のフレキシブルプリント配線板3を電池グループの第1側面及び第2側面に沿って配置することができる。このことにより、電圧検出線41を1枚のフレキシブルプリント配線板3に設けることができ、1つのコネクタ43で電圧検出線41と制御部38を接続することが可能になる。
When the assembled battery 60 has a battery group in which a plurality of battery cells 2 are stacked, the first side surface of the battery group in which the positive electrode terminal 4 or the negative electrode terminal 5 of each battery cell 2 is vertically aligned, and The flexible printed wiring board 3 can be disposed along the second side surface of the battery group in which the positive electrode terminal 4 or the negative electrode terminal 5 is arranged in the vertical direction, and the plurality of flying leads 6 are arranged in the vertical direction. Alternatively, it can be provided to correspond to and bond to the negative electrode terminal 5. In this case, the plurality of flying lead portions 6 are arranged in the vertical direction corresponding to the positive electrode terminal 4 or the negative electrode terminal 5 arranged in the vertical direction, and are joined to the positive electrode terminal 4 or the negative electrode terminal 5 at the bonding portions 11, respectively. Further, one bent flexible printed wiring board 3 can be disposed along the first side surface and the second side surface of the battery group. As a result, the voltage detection line 41 can be provided on one flexible printed wiring board 3, and it becomes possible to connect the voltage detection line 41 and the control unit 38 with one connector 43.
組電池60は、このような複数の電池セル2の電池グループとフレキシブルプリント配線板3とが接続されたものが複数並べられた構造を有することができる。この場合、フレキシブルプリント配線板3が隣接する2つの電池グループの間に位置するように複数の電池グループを並べることができる。また、隣接する2つの電池グループのうち一方に含まれる電池セル2の正極延出部25又は負極延出部26と、他方の電池グループに含まれる電池セル2の正極延出部25又は負極延出部26とが対向するように複数の電池グループを並べることができる。この場合、隣接する2つの電池グループの間に配置された2つのフレキシブルプリント配線板3は向き合って配置されることがある。この場合は、フライングリード部6も向き合って配置されるため、向き合っているフレキシブルプリント配線板3の間に絶縁性の隔壁36を設けることができる。これにより、組電池60が複数の電池グループを並べた構造を有する場合でも、折り曲げられた1枚のフレキシブルプリント配線板3で組電池60に含まれるすべての電池セル2を接続することができる。このことにより、電圧検出線41を1枚のフレキシブルプリント配線板3に設けることができ、1つのコネクタ43で電圧検出線41と制御部38を接続することが可能になる。
The assembled battery 60 can have a structure in which a plurality of connected battery groups of the plurality of battery cells 2 and the flexible printed wiring board 3 are arranged. In this case, the plurality of battery groups can be arranged so that the flexible printed wiring board 3 is located between two adjacent battery groups. In addition, the positive electrode extension 25 or the negative electrode extension 26 of the battery cell 2 included in one of the two adjacent battery groups and the positive electrode extension 25 or the negative electrode extension of the battery cell 2 included in the other battery group A plurality of battery groups can be arranged so that the outlets 26 face each other. In this case, two flexible printed wiring boards 3 disposed between two adjacent battery groups may be disposed facing each other. In this case, since the flying leads 6 are also disposed facing each other, the insulating partition 36 can be provided between the facing flexible printed wiring boards 3. Thereby, even when the battery assembly 60 has a structure in which a plurality of battery groups are arranged, it is possible to connect all the battery cells 2 included in the battery assembly 60 with one bent flexible printed wiring board 3. As a result, the voltage detection line 41 can be provided on one flexible printed wiring board 3, and it becomes possible to connect the voltage detection line 41 and the control unit 38 with one connector 43.
例えば、図1、2に示した電池セル2a~2eを含む組電池60の場合、折り曲げられた1枚のフレキシブルプリント配線板3が電池グループの第1側面及び第2側面に沿って配置され、フレキシブルプリント配線板3は、第1及び第2側面の正極端子4a~4e、負極端子5a~5eに対応する10個のフライングリード部6a~6jを有する。また、正極端子4a~4e又は負極端子5a~5eとフライングリード部6a~6jとが接合され接合部11a~11jを形成する。
また、例えば、図7(c)(d)に示した電池セル2a~2lを含む組電池60の場合、折り曲げられた1枚のフレキシブルプリント配線板3が、電池セル2a、2bが積層された第1電池グループの側面、電池セル2c~2gが積層された第2電池グループの側面及び電池セル2h~2lが積層された第3電池グループの側面にそれぞれ沿って配置され、電池セル2a~2lを直列接続又は並列接続している。 For example, in the case of abattery assembly 60 including the battery cells 2a to 2e shown in FIGS. 1 and 2, one bent flexible printed wiring board 3 is disposed along the first side and the second side of the battery group, The flexible printed wiring board 3 has ten flying lead portions 6a to 6j corresponding to the positive electrode terminals 4a to 4e of the first and second side surfaces and the negative electrode terminals 5a to 5e. Further, the positive electrode terminals 4a to 4e or the negative electrode terminals 5a to 5e and the flying lead portions 6a to 6j are joined to form joint portions 11a to 11j.
Further, for example, in the case of thebattery assembly 60 including the battery cells 2a to 2l shown in FIGS. 7C and 7D, one bent flexible printed wiring board 3 has the battery cells 2a and 2b stacked. The battery cells 2a to 2l are disposed along the side surfaces of the first battery group, the side surfaces of the second battery group on which the battery cells 2c to 2g are stacked, and the side surfaces of the third battery group on which the battery cells 2h to 2l are stacked. Are connected in series or in parallel.
また、例えば、図7(c)(d)に示した電池セル2a~2lを含む組電池60の場合、折り曲げられた1枚のフレキシブルプリント配線板3が、電池セル2a、2bが積層された第1電池グループの側面、電池セル2c~2gが積層された第2電池グループの側面及び電池セル2h~2lが積層された第3電池グループの側面にそれぞれ沿って配置され、電池セル2a~2lを直列接続又は並列接続している。 For example, in the case of a
Further, for example, in the case of the
組電池60の製造方法は、フレキシブルプリント配線板3の片持ち構造を有するフライングリード部6を折り曲げる工程と、電池セル2の正極端子4及び負極端子5のうちどちらか一方とフライングリード部6とを重ねて接合する工程と、電池セル2を折り曲げると共にフライングリード部6を曲げ戻す工程とを含む。
The method of manufacturing assembled battery 60 includes the steps of bending flying lead portion 6 having a cantilever structure of flexible printed wiring board 3, and one of positive electrode terminal 4 and negative electrode terminal 5 of battery cell 2 and flying lead portion 6. And bending the battery cell 2 and bending the flying lead portion 6 back.
ここでは、図1~3に示したような組電池60の製造方法を説明する。
まず、図4の展開図のようなフレキシブルプリント配線板3を準備する。このフレキシブルプリント配線板3に含まれるフライングリード部6を、図5(a)(b)のように折り曲げる。このフライングリード部6を折り曲げる工程では、図6の組電池60に含まれるフレキシブルプリント配線板3のように、フライングリード部6がフレキシブルプリント配線板3の電池セル2側と反対側に曲げられる。このことにより、図5(b)のように、フライングリード部6を設けた開口45は広くなる。 Here, a method of manufacturing thebattery pack 60 as shown in FIGS. 1 to 3 will be described.
First, the flexible printedwiring board 3 as shown in the developed view of FIG. 4 is prepared. The flying leads 6 included in the flexible printed wiring board 3 are bent as shown in FIGS. 5 (a) and 5 (b). In the step of bending the flying lead portion 6, the flying lead portion 6 is bent to the side opposite to the battery cell 2 side of the flexible printed wiring board 3 as in the flexible printed wiring board 3 included in the assembled battery 60 of FIG. As a result, as shown in FIG. 5 (b), the opening 45 provided with the flying lead portion 6 becomes wide.
まず、図4の展開図のようなフレキシブルプリント配線板3を準備する。このフレキシブルプリント配線板3に含まれるフライングリード部6を、図5(a)(b)のように折り曲げる。このフライングリード部6を折り曲げる工程では、図6の組電池60に含まれるフレキシブルプリント配線板3のように、フライングリード部6がフレキシブルプリント配線板3の電池セル2側と反対側に曲げられる。このことにより、図5(b)のように、フライングリード部6を設けた開口45は広くなる。 Here, a method of manufacturing the
First, the flexible printed
次に、フレキシブルプリント配線板3上に複数のパウチ型電池セル2a~2eを積み重ねて、図5(c)、図6のように、開口45に電池セル2の正極端子4及び負極端子5を挿入し、折り曲げたフライングリード部6と正極端子4又は負極端子5とを重ねる。
次に、図5(d)のように、重ねたフライングリード部6と正極端子4又は負極端子5とを接合器又は溶接器のヘッド部54(超音波溶接の場合、超音波ホーンとアンビル)で挟み、フライングリード部6と正極端子4又は負極端子5と溶接し接合部11を形成する。接合器又は溶接器としては、例えば、超音波溶接器、抵抗溶接器などを用いることができる。また、フライングリード部6と正極端子4又は負極端子5とはレーザー溶接や圧接により接合されてもよい。また、ハンダ、ロウ付け、かしめなどで接合されてもよい。このように、フライングリード部6を折り曲げることにより、フライングリード部6と正極端子4又は負極端子5とを容易に重ねることができ、接合作業が容易になる。この実施形態では、重ねたフライングリード部6と正極端子4又は負極端子5とをヘッド部54で挟むスペースを確保することができる。また、フライングリード部6の主要面と正極端子4の主要面又は負極端子5の主要面とを接合することができるので、より強固な接合ができる。 Next, the plurality of pouchtype battery cells 2a to 2e are stacked on the flexible printed wiring board 3, and as shown in FIG. 5 (c) and FIG. The inserted and bent flying lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 are overlapped.
Next, as shown in FIG. 5 (d), thehead 54 of the joining unit or welding unit (the ultrasonic horn and anvil in the case of ultrasonic welding) of the overlapping flying lead 6 and the positive electrode terminal 4 or the negative electrode terminal 5. The welding lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 are welded to form a joint portion 11. As a joining device or a welding device, for example, an ultrasonic welding device, a resistance welding device or the like can be used. The flying lead 6 and the positive electrode terminal 4 or the negative electrode terminal 5 may be joined by laser welding or pressure welding. Further, they may be joined by soldering, brazing, caulking or the like. As described above, by bending the flying lead portion 6, the flying lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 can be easily overlapped, and the bonding operation becomes easy. In this embodiment, it is possible to secure a space for sandwiching the overlapping flying lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 with the head portion 54. In addition, since the main surface of the flying lead portion 6 and the main surface of the positive electrode terminal 4 or the main surface of the negative electrode terminal 5 can be bonded, stronger bonding can be performed.
次に、図5(d)のように、重ねたフライングリード部6と正極端子4又は負極端子5とを接合器又は溶接器のヘッド部54(超音波溶接の場合、超音波ホーンとアンビル)で挟み、フライングリード部6と正極端子4又は負極端子5と溶接し接合部11を形成する。接合器又は溶接器としては、例えば、超音波溶接器、抵抗溶接器などを用いることができる。また、フライングリード部6と正極端子4又は負極端子5とはレーザー溶接や圧接により接合されてもよい。また、ハンダ、ロウ付け、かしめなどで接合されてもよい。このように、フライングリード部6を折り曲げることにより、フライングリード部6と正極端子4又は負極端子5とを容易に重ねることができ、接合作業が容易になる。この実施形態では、重ねたフライングリード部6と正極端子4又は負極端子5とをヘッド部54で挟むスペースを確保することができる。また、フライングリード部6の主要面と正極端子4の主要面又は負極端子5の主要面とを接合することができるので、より強固な接合ができる。 Next, the plurality of pouch
Next, as shown in FIG. 5 (d), the
次に、正極折り曲げ部30及び負極折り曲げ部31が形成されるように複数の電池セル2a~2eを折り曲げると共に図5(e)のように複数のフライングリード部6a~6jを曲げ戻す。この際、複数の電池セル2a~2eが積層された電池グループの側面のフレキシブルプリント配線板3は引き上げられる。このことにより、図6に示したような組電池60を、図1~3に示したような組電池60に変形させることができる。このことにより、組電池60を小型化することができる。その後、フレキシブルプリント配線板3の接続端子42a、42b及びコネクタ43を制御部38に接続することにより、図1、2に示したような組電池60を製造することができる。
Next, the plurality of battery cells 2a to 2e are bent so that the positive electrode bending portion 30 and the negative electrode bending portion 31 are formed, and the plurality of flying lead portions 6a to 6j are bent back as shown in FIG. 5 (e). At this time, the flexible printed wiring board 3 on the side surface of the battery group in which the plurality of battery cells 2a to 2e are stacked is pulled up. By this, the assembled battery 60 as shown in FIG. 6 can be transformed into the assembled battery 60 as shown in FIGS. As a result, the battery assembly 60 can be miniaturized. Thereafter, by connecting the connection terminals 42a and 42b of the flexible printed wiring board 3 and the connector 43 to the control unit 38, the assembled battery 60 as shown in FIGS. 1 and 2 can be manufactured.
また、図7に示した組電池60の製造方法では、図7(a)に示したようなフレキシブルプリント配線板3上に複数のパウチ型電池セル2a~2lを積層し、折り曲げたフライングリード部6と正極端子4又は負極端子5とを重ねる。その後、フライングリード部6と正極端子4又は負極端子5とを接合し、複数の電池セル2a~2lを折り曲げると共に複数のフライングリード部6を曲げ戻し電池グループの側面のフレキシブルプリント配線板3を引き上げる。その後、フレキシブルプリント配線板3が隣接する2つの電池グループの間に位置するように、図7(b)の点線D、点線Eでフレキシブルプリント配線板3を折り曲げる。このことにより、図7(c)のように、電池セル2の電池グループの並び方を変えることができる。また、フレキシブルプリント配線板3を折り曲げ構造とすることにより、フレキシブルプリント配線板3の展開長さを短くすることができ、フレキシブルプリント配線板3の製造コストを低減することができる。
次に、図7(d)のように、フレキシブルプリント配線板3及び電池セル2を筐体35に収容して組電池60を形成することができる。また、筐体35は、隣接する2つの電池グループの間に位置する隔壁36a、36bを有することができる。 Further, in the method of manufacturing thebattery assembly 60 shown in FIG. 7, a flying lead portion obtained by laminating a plurality of pouch type battery cells 2a to 2l on a flexible printed wiring board 3 as shown in FIG. 6 and the positive electrode terminal 4 or the negative electrode terminal 5 are overlapped. Thereafter, the flying lead portion 6 and the positive electrode terminal 4 or the negative electrode terminal 5 are joined to bend the plurality of battery cells 2a to 2l and bend back the plurality of flying lead portions 6 to pull up the flexible printed wiring board 3 on the side surface of the battery group . Thereafter, the flexible printed wiring board 3 is bent along the dotted line D and the dotted line E in FIG. 7B so that the flexible printed wiring board 3 is located between two adjacent battery groups. As a result, as shown in FIG. 7C, the arrangement of the battery groups of the battery cells 2 can be changed. Further, by forming the flexible printed wiring board 3 in a bent structure, the developed length of the flexible printed wiring board 3 can be shortened, and the manufacturing cost of the flexible printed wiring board 3 can be reduced.
Next, as shown in FIG. 7D, the flexible printedwiring board 3 and the battery cell 2 can be accommodated in the housing 35 to form the assembled battery 60. In addition, the housing 35 can have partition walls 36a and 36b located between two adjacent battery groups.
次に、図7(d)のように、フレキシブルプリント配線板3及び電池セル2を筐体35に収容して組電池60を形成することができる。また、筐体35は、隣接する2つの電池グループの間に位置する隔壁36a、36bを有することができる。 Further, in the method of manufacturing the
Next, as shown in FIG. 7D, the flexible printed
この実施形態では、電池グループに含まれる複数の電池セル2は上下方向に積み重ねられているが、電池セル2の厚さ方向であれば、上下方向以外の方向に積層することができる。
In this embodiment, the plurality of battery cells 2 included in the battery group are vertically stacked, but in the thickness direction of the battery cells 2, the battery cells 2 can be stacked in directions other than the vertical direction.
2、2a~2l:電池セル 3:フレキシブルプリント配線板 4:正極端子 5:負極端子 6、6a~6j:フライングリード部 7:正極 8:負極 9:セパレータ 10、10a~10e:積層構造 11、11a~11j:接合部 12、12a~12e:電極集合体 15:電解質 16、16a、16b:外装体 18:正極集電シート 19:正極活物質層 22:負極集電シート 23:負極活物質層 25:正極延出部 26:負極延出部 30:正極折り曲げ部 31:負極折り曲げ部 35:筐体 36、36a、36b:隔壁 37:蓋 38:制御部 40:電力線 41:電圧検出線(電池状態検出線) 42、42a、42b:接続端子 43:コネクタ 44:絶縁性フィルム 45、45a~45j:開口 46:正極側クリップ 47:負極側クリップ 48:ベースフィルム 49:カバーフィルム 51:正極側封止部 52:負極側封止部 54:接合器のヘッド部 60:組電池
2, 2a to 2l: battery cell 3: flexible printed wiring board 4: positive electrode terminal 5: negative electrode terminal 6, 6a to 6j: flying lead portion 7: positive electrode 8: negative electrode 9: separator 10, 10a to 10e: laminated structure 11, 11a to 11j: junctions 12, 12a to 12e: electrode assembly 15: electrolyte 16, 16a, 16b: package 18: positive electrode current collector sheet 19: positive electrode active material layer 22: negative electrode current collector sheet 23: negative electrode active material layer 25: positive electrode extension portion 26: negative electrode extension portion 30: positive electrode bent portion 31: negative electrode bent portion 35: housing 36, 36a, 36b: partition wall 37: lid 38: control portion 40: power line 41: voltage detection line (battery State detection line) 42, 42a, 42b: Connection terminal 3: connector 44: insulating film 45, 45a to 45j: opening 46: positive electrode side clip 47: negative electrode side clip 48: base film 49: cover film 51: positive electrode side sealing portion 52: negative electrode side sealing portion 54: bonding Unit head 60: assembled battery
Claims (12)
- 複数の電池セルと、フレキシブルプリント配線板とを備え、
各電池セルは、外装体の内部から外部へ延出した板状の端子を備え、
前記複数の電池セルは、前記フレキシブルプリント配線板により直列接続又は並列接続され、
前記フレキシブルプリント配線板は、少なくとも一部が前記フレキシブルプリント配線板の積層構造とつながっている板状のフライングリード部を備え、
前記端子と前記フライングリード部は面同士が接合されていることを特徴とする組電池。 It has multiple battery cells and a flexible printed wiring board,
Each battery cell includes a plate-like terminal extending from the inside of the outer package to the outside,
The plurality of battery cells are connected in series or in parallel by the flexible printed wiring board,
The flexible printed wiring board includes a plate-like flying lead portion at least a part of which is connected to the laminated structure of the flexible printed wiring board.
The assembled battery is characterized in that the terminals and the flying lead portions are bonded to each other. - 前記フレキシブルプリント配線板は開口を有し、
前記フライングリード部は、前記開口中に設けられている請求項1に記載の組電池。 The flexible printed wiring board has an opening,
The assembled battery according to claim 1, wherein the flying lead portion is provided in the opening. - 前記開口は、前記フレキシブルプリント配線板の端部を除く面内に形成されている請求項2に記載の組電池。 The assembled battery according to claim 2, wherein the opening is formed in a plane excluding an end portion of the flexible printed wiring board.
- 前記フレキシブルプリント配線板は、電力線と電池状態検出線とを有し、
前記フライングリード部は、前記電力線の一部である請求項1~3のいずれか1つに記載の組電池。 The flexible printed wiring board has a power line and a battery state detection line,
The assembled battery according to any one of claims 1 to 3, wherein the flying lead portion is a part of the power line. - 前記電力線と前記電池状態検出線は、前記フレキシブルプリント配線板の内部で接続されている請求項4に記載の組電池。 The assembled battery according to claim 4, wherein the power line and the battery state detection line are connected inside the flexible printed wiring board.
- 前記電力線は、100μm以上300μm以下の厚さを有する金属板である請求項4または5に記載の組電池。 The assembled battery according to claim 4, wherein the power line is a metal plate having a thickness of 100 μm to 300 μm.
- 各電池セルは、平板形状を有し、
複数の電池セルは、前記電池セルの厚さ方向に積層されている請求項1~6のいずれか1つに記載の組電池。 Each battery cell has a flat plate shape,
The assembled battery according to any one of claims 1 to 6, wherein the plurality of battery cells are stacked in the thickness direction of the battery cells. - 前記電池セルは、前記外装体内に電極集合体を備え、
前記電極集合体は、少なくとも1つの正極と少なくとも1つの負極と少なくとも1つのセパレータとが重ねられた積層構造と、前記積層構造から正極集電シートが重なって延出した正極延出部と、前記積層構造から負極集電シートが重なって延出した負極延出部とを備え、
前記積層構造の端部と、前記端子と前記フライングリード部の接合部と、の間で前記端子または前記外装体が折り曲げられている請求項1~7のいずれか1つに記載の組電池。 The battery cell includes an electrode assembly in the exterior body,
The electrode assembly has a laminated structure in which at least one positive electrode, at least one negative electrode, and at least one separator are stacked, and a positive electrode extension portion in which a positive electrode current collector sheet is overlapped and extended from the laminated structure, And a negative electrode extension portion in which a negative electrode current collector sheet is overlapped and extended from the laminated structure,
The assembled battery according to any one of claims 1 to 7, wherein the terminal or the exterior body is bent between an end portion of the laminated structure and a junction of the terminal and the flying lead portion. - 複数の電池グループを備え、
各電池グループは、複数の電池セルが厚さ方向に積層された構造を有し、
各電池グループに含まれる複数の電池セルは、前記フレキシブルプリント配線板により直列接続又は並列接続され、
複数の電池グループは、同一のフレキシブルプリント配線板によりつながっている請求項1~8のいずれか1つに記載の組電池。 Equipped with multiple battery groups,
Each battery group has a structure in which a plurality of battery cells are stacked in the thickness direction,
A plurality of battery cells included in each battery group are connected in series or in parallel by the flexible printed wiring board,
The assembled battery according to any one of claims 1 to 8, wherein the plurality of battery groups are connected by the same flexible printed wiring board. - 隣接する2つの前記電池グループは、第1電池グループに含まれる複数の電池セルが接続した前記フレキシブルプリント配線板の第1部分と、第2電池グループに含まれる複数の電池セルが接続した前記フレキシブルプリント配線板の第2部分とが対向するように配置されており、
前記フレキシブルプリント配線板の第1部分と第2部分との間には、絶縁性の隔壁が設けられている請求項9に記載の組電池。 In the two adjacent battery groups, the first portion of the flexible printed wiring board to which the plurality of battery cells included in the first battery group are connected, and the flexible portion in which the plurality of battery cells included in the second battery group are connected It is arranged to face the second part of the printed wiring board,
The assembled battery according to claim 9, wherein an insulating partition wall is provided between the first portion and the second portion of the flexible printed wiring board. - 少なくとも一部がフレキシブルプリント配線板の積層構造とつながっている板状のフライングリード部を折り曲げる工程と、
電池セルの外装体の内部から外部へ延出した板状の端子と前記フライングリード部とを重ねて接合する工程と、
前記フライングリード部を曲げ戻す工程とを含む組電池の製造方法。 Bending a plate-like flying lead portion at least a part of which is connected to the laminated structure of the flexible printed wiring board;
A step of overlapping and joining the plate-like terminal extended from the inside of the outer package of the battery cell to the outside and the flying lead portion;
And b) bending back the flying lead portion. - 前記フライングリード部を曲げ戻す工程は、前記端子または前記外装体の折り曲げを伴う工程である請求項11に記載の組電池の製造方法。 The method of manufacturing the assembled battery according to claim 11, wherein the step of bending back the flying lead portion is a step involving bending of the terminal or the exterior body.
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Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111106301A (en) * | 2019-04-02 | 2020-05-05 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
EP3754753A1 (en) * | 2019-06-17 | 2020-12-23 | Yazaki Corporation | Busbar module |
CN113711432A (en) * | 2019-06-25 | 2021-11-26 | 株式会社Lg新能源 | Battery module and battery pack including the same |
EP3926728A4 (en) * | 2020-01-08 | 2022-06-08 | LG Energy Solution, Ltd. | Battery pack formed by laminating cells using flexible printed circuit board (fpcb) |
CN115117522A (en) * | 2021-03-18 | 2022-09-27 | 辉能科技股份有限公司 | Soft-bag type battery module and electric energy supplier thereof |
CN115149170A (en) * | 2021-03-30 | 2022-10-04 | 比亚迪股份有限公司 | Battery and electronic equipment using same |
CN115149172A (en) * | 2021-03-30 | 2022-10-04 | 比亚迪股份有限公司 | Battery and electronic equipment using same |
US11532824B2 (en) | 2016-09-22 | 2022-12-20 | Apple Inc. | Current collector for a stacked battery design |
US11588155B1 (en) * | 2020-09-08 | 2023-02-21 | Apple Inc. | Battery configurations for cell balancing |
US11600891B1 (en) | 2020-09-08 | 2023-03-07 | Apple Inc. | Battery configurations having balanced current collectors |
US11677120B2 (en) | 2020-09-08 | 2023-06-13 | Apple Inc. | Battery configurations having through-pack fasteners |
US11699815B1 (en) | 2017-09-28 | 2023-07-11 | Apple Inc. | Stacked battery components and configurations |
WO2023126358A3 (en) * | 2021-12-27 | 2023-08-17 | Northvolt Ab | Secondary battery assembly |
US11791470B2 (en) | 2017-04-21 | 2023-10-17 | Apple Inc. | Battery cell with electrolyte diffusion material |
US11862801B1 (en) | 2017-09-14 | 2024-01-02 | Apple Inc. | Metallized current collector for stacked battery |
US11888112B2 (en) | 2017-05-19 | 2024-01-30 | Apple Inc. | Rechargeable battery with anion conducting polymer |
US11923494B2 (en) | 2020-09-08 | 2024-03-05 | Apple Inc. | Battery configurations having through-pack fasteners |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI777471B (en) * | 2021-03-25 | 2022-09-11 | 齊碩科技股份有限公司 | Intelligent battery string monitoring and charge-discharge control device and its measurement method |
CN113708020B (en) * | 2021-08-24 | 2023-05-05 | 湖北亿纬动力有限公司 | Vibration reduction method for tab welding and clamping tool |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004273351A (en) * | 2003-03-11 | 2004-09-30 | Nissan Motor Co Ltd | Terminal connection structure of battery |
JP2013080618A (en) * | 2011-10-04 | 2013-05-02 | Auto Network Gijutsu Kenkyusho:Kk | Wiring module for battery |
JP2014086246A (en) * | 2012-10-23 | 2014-05-12 | Nippon Mektron Ltd | Flexible printed wiring board with bus bar, and method of manufacturing the same, and battery system |
JP2015118731A (en) * | 2013-12-16 | 2015-06-25 | 日立金属株式会社 | Wire material, secondary battery device, electronic apparatus, and producing method of wire material |
US20160308255A1 (en) * | 2015-04-17 | 2016-10-20 | Samsung Sdi Co., Ltd. | Battery pack |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7667432B2 (en) * | 2006-04-27 | 2010-02-23 | Tesla Motors, Inc. | Method for interconnection of battery packs and battery assembly containing interconnected battery packs |
CN102544616B (en) * | 2010-12-08 | 2014-07-30 | 比亚迪股份有限公司 | Battery module |
-
2017
- 2017-09-19 JP JP2017178843A patent/JP7054892B2/en active Active
-
2018
- 2018-09-14 WO PCT/JP2018/034259 patent/WO2019059133A1/en active Application Filing
- 2018-09-18 TW TW107132798A patent/TWI788418B/en active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004273351A (en) * | 2003-03-11 | 2004-09-30 | Nissan Motor Co Ltd | Terminal connection structure of battery |
JP2013080618A (en) * | 2011-10-04 | 2013-05-02 | Auto Network Gijutsu Kenkyusho:Kk | Wiring module for battery |
JP2014086246A (en) * | 2012-10-23 | 2014-05-12 | Nippon Mektron Ltd | Flexible printed wiring board with bus bar, and method of manufacturing the same, and battery system |
JP2015118731A (en) * | 2013-12-16 | 2015-06-25 | 日立金属株式会社 | Wire material, secondary battery device, electronic apparatus, and producing method of wire material |
US20160308255A1 (en) * | 2015-04-17 | 2016-10-20 | Samsung Sdi Co., Ltd. | Battery pack |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11532824B2 (en) | 2016-09-22 | 2022-12-20 | Apple Inc. | Current collector for a stacked battery design |
US11791470B2 (en) | 2017-04-21 | 2023-10-17 | Apple Inc. | Battery cell with electrolyte diffusion material |
US11888112B2 (en) | 2017-05-19 | 2024-01-30 | Apple Inc. | Rechargeable battery with anion conducting polymer |
US11862801B1 (en) | 2017-09-14 | 2024-01-02 | Apple Inc. | Metallized current collector for stacked battery |
US11699815B1 (en) | 2017-09-28 | 2023-07-11 | Apple Inc. | Stacked battery components and configurations |
CN111106301A (en) * | 2019-04-02 | 2020-05-05 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
EP3923373A4 (en) * | 2019-04-02 | 2022-07-20 | Contemporary Amperex Technology Co., Limited | Secondary battery and battery module |
CN111106301B (en) * | 2019-04-02 | 2021-02-26 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
US11069942B2 (en) | 2019-04-02 | 2021-07-20 | Contemporary Amperex Technology Co., Limited | Secondary battery and battery module |
US11646458B2 (en) | 2019-06-17 | 2023-05-09 | Yazaki Corporation | Busbar module |
EP3754753A1 (en) * | 2019-06-17 | 2020-12-23 | Yazaki Corporation | Busbar module |
CN113711432A (en) * | 2019-06-25 | 2021-11-26 | 株式会社Lg新能源 | Battery module and battery pack including the same |
EP3926728A4 (en) * | 2020-01-08 | 2022-06-08 | LG Energy Solution, Ltd. | Battery pack formed by laminating cells using flexible printed circuit board (fpcb) |
US11588155B1 (en) * | 2020-09-08 | 2023-02-21 | Apple Inc. | Battery configurations for cell balancing |
US11600891B1 (en) | 2020-09-08 | 2023-03-07 | Apple Inc. | Battery configurations having balanced current collectors |
US11677120B2 (en) | 2020-09-08 | 2023-06-13 | Apple Inc. | Battery configurations having through-pack fasteners |
US11923494B2 (en) | 2020-09-08 | 2024-03-05 | Apple Inc. | Battery configurations having through-pack fasteners |
CN115117522A (en) * | 2021-03-18 | 2022-09-27 | 辉能科技股份有限公司 | Soft-bag type battery module and electric energy supplier thereof |
CN115117522B (en) * | 2021-03-18 | 2024-05-03 | 辉能科技股份有限公司 | Soft package type battery module and electric energy supply device thereof |
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WO2023126358A3 (en) * | 2021-12-27 | 2023-08-17 | Northvolt Ab | Secondary battery assembly |
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