WO2011136090A1 - 扁平型電池 - Google Patents
扁平型電池 Download PDFInfo
- Publication number
- WO2011136090A1 WO2011136090A1 PCT/JP2011/059640 JP2011059640W WO2011136090A1 WO 2011136090 A1 WO2011136090 A1 WO 2011136090A1 JP 2011059640 W JP2011059640 W JP 2011059640W WO 2011136090 A1 WO2011136090 A1 WO 2011136090A1
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- WIPO (PCT)
- Prior art keywords
- negative electrode
- conductive
- electrode tab
- current collector
- conductive portion
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
- H01M50/557—Plate-shaped terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- 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
- H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/564—Terminals characterised by their manufacturing process
- H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to flat batteries.
- Patent Document 1 In cylindrical batteries, it is known to form an arcuate slit in the circular conductive tab so that the center of the tab is bent by the slit without disturbing the large number of welding contacts even if the battery cover is expanded by the increase of the internal pressure.
- the electrode tabs (electrode terminals) of the positive electrode and the negative electrode derived from the laminate outer package are ultrasonic waves in the current collectors included in the positive electrode plate and the negative electrode plate of the power generation element. Welded by welding etc.
- the electrode tab and the current collector may have a difference in expansion ratio, which may cause the current collector to peel off the wrinkles and the welded portion.
- An object of the present invention is to provide a flat type battery which can follow the deformation even if relative deformation occurs due to the difference in expansion ratio of the current collector and the electrode tab.
- the electrode tab in the flat-type battery, includes a conductive portion to be joined in an overlapping manner to the current collector, and a stress relaxation portion formed of a material having a higher stretchability than the conductive portion.
- the expansion and contraction that occurs due to the difference between the expansion and contraction rates of the current collector and the electrode tab can be relaxed in the stress relaxation portion, it is possible to follow relative deformation. As a result, the occurrence of wrinkles and peeling on the current collector can be suppressed.
- FIG. 1 is a plan view showing a flat battery according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view taken along the line II-II in FIG. It is a top view which expands and shows the junction part of the negative electrode tab of FIG. 1, and a negative electrode collector.
- FIG. 5 is a cross-sectional view taken along the line AA of FIG. 4; It is a top view which expands and shows the junction part of the negative electrode tab which concerns on other embodiment of this invention, and a negative electrode collector. It is a top view which expands and shows the junction part of the negative electrode tab which concerns on other embodiment of this invention, and a negative electrode collector.
- FIG. 8 is a cross-sectional view taken along the line BB of FIG. 7; It is sectional drawing of a negative electrode tab in the junction part of the negative electrode tab which concerns on other embodiment of this invention, and a negative electrode collector. It is sectional drawing of the flat type battery which concerns on other embodiment of this invention. It is a top view which expands and shows the junction part of the negative electrode tab and negative electrode collector shown in FIG. It is sectional drawing of the flat type battery which concerns on other embodiment of this invention. It is a top view which expands and shows the junction part of a negative electrode tab and a negative electrode collector shown in FIG.
- FIG. 7 is an enlarged plan view showing a joint portion between a negative electrode tab and a negative electrode current collector in Example 2. It is a top view which expands and shows the junction part of the negative electrode tab which concerns on the comparative example 1, and a negative electrode collector. It is a top view which expands and shows the junction part of the negative electrode tab which concerns on Example 3, and a negative electrode collector.
- FIG. 6 is a plan view of a flat battery according to Comparative Example 2; It is a graph in the flat type battery of Example 3 and Comparative Example 2 which shows the temperature characteristic to SOC.
- the flat battery 1 of this example is a lithium-based, flat-plate, or laminated-type thin secondary battery, and as shown in FIGS. 1 and 2, two positive plates 11 and four separators 12; It is comprised from the negative electrode plate 13 of 3 sheets, the positive electrode tab 14, the negative electrode tab 15, the upper exterior member 16, the lower exterior member 17, and the electrolyte which is not illustrated in particular.
- the positive electrode plate 11, the separator 12, the negative electrode plate 13 and the electrolyte constitute a power generation element 18, and the positive electrode plate 11 and the negative electrode plate 13 constitute an electrode plate, and the upper exterior member 16 and the lower exterior member 17 are a pair.
- the positive electrode plate 11 constituting the power generation element 18 has a positive electrode current collector 11a extending to the positive electrode tab 14 and positive electrode layers 11b and 11c formed on both main surfaces of part of the positive electrode current collector 11a. .
- the positive electrode layers 11b and 11c of the positive electrode plate 11 are not formed over both main surfaces of the whole of the positive electrode current collector 11a, but as shown in FIG. 2, the positive electrode plate 11, the separator 12 and the negative electrode When laminating
- the positive electrode plate 11 and the positive electrode current collector 11a are formed of a single conductor in this example, the positive electrode plate 11 and the positive electrode current collector 11a are separately formed, and these are joined together. It is also good.
- the positive electrode current collector 11a of the positive electrode plate 11 is made of, for example, an electrochemically stable metal foil such as an aluminum foil, an aluminum alloy foil, a copper foil, or a nickel foil.
- the positive electrode layer 11b of the positive electrode plate 11, 11c for example, lithium nickel oxide (LiNiO 2), lithium manganate (LiMnO 2), or, or lithium composite oxides such as lithium cobaltate (LiCoO 2), chalcogen ( A mixture of a positive electrode active material such as S, Se, Te) or the like, a conductive agent such as carbon black, an adhesive such as aqueous dispersion of polytetrafluoroethylene, and a solvent is used as the positive electrode current collector 11a. It is formed by applying to both main surfaces of a part of, drying and rolling.
- the negative electrode plate 13 constituting the power generation element 18 includes a negative electrode current collector 13a extending to the negative electrode tab 15 and negative electrode layers 13b and 13c formed on both main surfaces of a part of the negative electrode current collector 13a.
- the negative electrode layers 13b and 13c of the negative electrode plate 13 are not formed over both main surfaces of the whole of the negative electrode current collector 13a, but as shown in FIG. 2, the positive electrode plate 11, the separator 12 and the negative electrode When laminating
- the negative electrode plate 13 and the negative electrode current collector 13a are formed of a single conductor, but the negative electrode plate 13 and the negative electrode current collector 13a are separately formed, and these are joined together. It is also good.
- the negative electrode current collector 13a of the negative electrode plate 13 is made of, for example, an electrochemically stable metal foil such as nickel foil, copper foil, stainless steel foil, or iron foil.
- the negative electrode layers 13b and 13c of the negative electrode plate 13 occlude and release lithium ions of the above-described positive electrode active material such as, for example, amorphous carbon, non-graphitizable carbon, graphitizable carbon, or graphite.
- An active material is mixed with an aqueous dispersion of styrene butadiene rubber resin powder as a precursor material of an organic fired body, dried, and then pulverized, thereby supporting carbonized styrene butadiene rubber on the surface of carbon particles.
- a main material is further mixed with a binder such as an acrylic resin emulsion, and the mixture is applied to both main surfaces of a part of the negative electrode current collector 13a, dried and rolled.
- the flat characteristic of the potential during charge and discharge is poor, and the output voltage decreases with the amount of discharge. It is advantageous because there is no output reduction.
- the separator 12 of the power generation element 18 is for preventing a short circuit between the positive electrode plate 11 and the negative electrode plate 13 described above, and may have a function of holding an electrolyte.
- the separator 12 is a microporous film made of, for example, a polyolefin such as polyethylene (PE) or polypropylene (PP), and when an overcurrent flows, the heat generation occludes pores of the layer and interrupts the current. It also has a function.
- the separator 12 according to this example is not limited to a single layer film of polyolefin or the like, and a three-layer structure in which a polypropylene film is sandwiched by a polyethylene film, or a laminate of a polyolefin microporous film and an organic non-woven fabric may be used. it can.
- various functions such as a function to prevent an overcurrent, an electrolyte holding function, and a function to maintain the shape of the separator (improve rigidity) can be provided.
- the above power generating element 18 is formed by alternately laminating the positive electrode plate 11 and the negative electrode plate 13 with the separator 12 in between.
- the two positive electrode plates 11 are connected to the metal foil positive electrode tab 14 through the positive electrode current collector 11a, while the three negative electrode plates 13 are connected through the negative electrode current collector 13a. Similarly, they are respectively connected to the negative electrode tabs 15 made of metal foil.
- the positive electrode plate 11, the separator 12, and the negative electrode plate 13 of the power generation element 18 are not limited to the above-mentioned number, and, for example, even one positive electrode plate 11, two separators 12, and two negative electrode plates 13
- the power generation element 18 can be configured, and the number of the positive electrode plate 11, the separator 12, and the negative electrode plate 13 can be selected and configured as necessary.
- the positive electrode tab 14 and the negative electrode tab 15 are not particularly limited as long as they are electrochemically stable metal materials, but the positive electrode tab 14 is, for example, aluminum having a thickness of about 0.02 mm as in the above-described positive electrode current collector 11a. Foil, aluminum alloy foil, copper foil, nickel foil, etc. can be mentioned. Further, as the negative electrode tab 15, similar to the above-mentioned negative electrode current collector 13a, for example, a nickel foil having a thickness of about 0.02 mm, a copper foil, a stainless steel foil, an iron foil or the like can be mentioned.
- the metal foils themselves constituting the current collectors 11a and 13a of the electrode plates 11 and 13 are extended to the electrode tabs 14 and 15, in other words, one metal foil 11a, An electrode layer (positive electrode layers 11b and 11c or negative electrode layers 13b and 13c) is formed on a part of 13a, and the remaining end is used as a joining member with the electrode tabs 14 and 15, the electrode plates 11 and 13 as electrode tabs 14, although it was set as the structure connected to 15, metal foil which comprises collectors 11a and 13a located in a positive electrode layer and a negative electrode layer, and metal foil which comprises a joining member are mutually connected as another material or components. It is also good.
- the current collector and the bonding member located between the positive electrode layer and the negative electrode layer are described as being formed of one metal foil.
- the power generation element 18 described above is housed and sealed in the upper exterior member 16 and the lower exterior member 17.
- the upper exterior member 16 and the lower exterior member 17 of this example are, for example, polyethylene, modified polyethylene, polypropylene, modified polypropylene, or ionomer, from the inside to the outside of the flat battery 1.
- upper exterior member 16 and lower exterior member 17 are both made of resin such as polyethylene, modified polyethylene, polypropylene, modified polypropylene, or ionomer, for example, on one side of the metal foil such as aluminum foil (inner side of flat type battery 1) It is formed of a flexible material such as a resin-metal thin film laminate material obtained by laminating at one side and laminating the other side (outside side of the flat type battery 1) with a polyamide resin or a polyester resin.
- resin such as polyethylene, modified polyethylene, polypropylene, modified polypropylene, or ionomer
- the metal members in addition to the resin layer as the exterior members 16 and 17, it is possible to improve the strength of the exterior member itself. Further, by forming the inner layer of the exterior members 16 and 17 with a resin such as polyethylene, modified polyethylene, polypropylene, modified polypropylene, or ionomer, for example, good fusion bonding with the metal electrode tabs 14 and 15 can be achieved. It becomes possible to secure.
- a resin such as polyethylene, modified polyethylene, polypropylene, modified polypropylene, or ionomer
- the positive electrode tab 14 is led out from one end of the sealed exterior members 16, 17, and the negative electrode tab 15 is led out from the other end, Since a gap is generated in the fusion-bonded portion between the upper exterior member 16 and the lower exterior member 17 by the thickness of the electrode tabs 14 and 15, the electrode tabs 14 and 15 are maintained in order to maintain the sealing performance inside the flat battery 1.
- a seal film made of, for example, polyethylene, polypropylene or the like may be interposed in the portion where the outer members 16 and 17 contact with each other. It is preferable that this seal film is made of the resin of the same system as the resin constituting the exterior members 16 and 17 in any of the positive electrode tab 14 and the negative electrode tab 15 from the viewpoint of heat fusion.
- the exterior members 16 and 17 wrap the power generation element 18, a part of the positive electrode tab 14 and a part of the negative electrode tab 15, and an organic liquid solvent is added to the internal space formed by the exterior members 16 and 17. While injecting a liquid electrolyte containing a lithium salt such as lithium chlorate, lithium borofluoride or lithium hexafluorophosphate as a solute, the space formed by the exterior members 16 and 17 is drawn into a vacuum state after being drawn up, The outer peripheral edges of the members 16 and 17 are heat-sealed and sealed by a heat press.
- a liquid electrolyte containing a lithium salt such as lithium chlorate, lithium borofluoride or lithium hexafluorophosphate
- organic liquid solvent examples include ester solvents such as propylene carbonate (PC), ethylene carbonate (EC), dimethyl carbonate (DMC) and methyl ethyl carbonate, but the organic liquid solvent in this example is limited thereto. Instead, it is also possible to use an organic liquid solvent prepared by mixing an ether solvent such as ⁇ -butylactone ( ⁇ -BL), dietethane (DEE) and the like with an ester solvent and the like.
- FIG. 3 is a plan view showing an enlarged bonding portion between the negative electrode tab 15 and the negative electrode current collector 13a, and the illustration of the exterior members 16, 17 and the power generation element 18 is omitted.
- the junction part of the positive electrode tab 14 and the positive electrode collector 11a is also set as the same structure.
- FIG. 4 is a cross-sectional view taken along the line AA of FIG.
- the negative electrode tab 15 and the three negative electrode current collectors 13a are joined by ultrasonic welding at, for example, six joint portions 20.
- the negative electrode tab 15 has a plurality of divided conductive portions 151 and an insulating member 152 covering the conductive portions 151.
- the conductive portion 151 is a flat cable of six cables and is formed of a conductive material such as copper (conductor), and is welded to the negative electrode current collector 13 a in the joint portion 20 individually. It is done.
- the six conductors forming the conductive portion 151 have a shape extending from the negative electrode current collector 13 a toward the outer peripheral edge of the exterior members 16 and 17.
- the insulating portions 152 cover the conductive portions 151 so as to sandwich the side surfaces of the flat conductive portions 151, and ensure insulation between the conductive portions 151.
- the insulating portion 152 is formed between the plurality of conductive portions 151 along the surface direction of the negative electrode current collector 13a (the expansion and contraction direction at the time of expansion and contraction to be described later). Further, the insulating portion 152 is formed of a material that is more stretchable than the conductive portion 151, and is formed of, for example, a resin.
- the stretchability includes stretch due to stress caused by heat and stretch due to mechanical stress.
- FIG. 3 corresponds to, for example, a plan view of the negative electrode current collector 13a and the negative electrode tab 15 viewed from the bottom (lower exterior member 17) side of FIG. 2, and the negative electrode tab 15 is depicted with a short length.
- the negative electrode tab 15 can be extended to any length.
- the negative electrode tab 15 including the plurality of conductive parts 151 and the insulating part 152 has a flexible cable shape as a whole and can be bent or twisted.
- the insulating portion 152 may be formed of a relatively rigid resin material, and the negative electrode tab 15 may retain its shape.
- the end portions of the conductive portions 151 are exposed from the insulating portion 152.
- the conductive portion 151 is bonded to the negative electrode current collector 13 a at the bonding portion 20 at the exposed one end.
- the exposed other end of the conductive portion 151 is connected to a wire (not shown) outside the flat battery 1.
- the expansion ratio is different. There is something to do.
- the negative electrode tab 15 or the negative electrode does not change so that the inter-junction distance It follows the expansion. There is a possibility that wrinkles may occur in the current collector 13 or the bonding portion 20 may peel off.
- the insulating portions 152 formed of a material having stretchability higher than that of the conductive portions 15 are formed on the electrode tabs 14 and 15.
- the insulating portion 152 follows and stretches, and the current collection is performed while maintaining the bonding strength of the bonding portion 20. It prevents that wrinkles occur in the body 11a, 13a.
- the insulating portion 152 follows and contracts to maintain the bonding strength of the bonding portion 20 while the current collectors 11a and 13a are maintained. To prevent the formation of wrinkles.
- the stress due to the welding is not concentrated on the joint portion 20, and the stress is relieved by the insulating portion 152, so that the joint portion 20 can be prevented from peeling off.
- the plurality of cable-shaped conductive portions 151 are provided on the electrode tabs 14 and 15, and the insulating portion 152 is formed between the plurality of conductive portions 151.
- the distance between the plurality of bonding portions 20 changes.
- the distance between the conductive portions 151 follows expansion and contraction.
- the insulating portion 152 can relieve stress associated with expansion and contraction.
- the insulating portion 152 is provided on the electrode tabs 14 and 15 in order to relieve stress due to welding, but instead of the insulating portion 152, another member such as a conductor having a larger expansion ratio than the conductive portion 151 is used. And may be used as a stress relieving member.
- the conductive portion 151 is a flat cable in this example, it may be a cable having a circular cross section, and it is not necessary to use a cable.
- insulation part 152 of this example is corresponded to the "stress relief part" of this invention.
- FIG. 5 is a plan view showing the joint portion between the negative electrode tab 15 and the negative electrode current collector 13a according to another embodiment of the present invention, and the illustration of the exterior members 16, 17 and the power generation element 18 is omitted.
- the entire configuration of the flat battery 1 is the same as the embodiment described above with reference to FIGS. 1 and 2. Further, the joint portion between the positive electrode tab 14 and the positive electrode current collector 11 a is also configured the same as that in FIG. 4.
- the negative electrode tab 15 of this example shown in FIG. 5 is different from the negative electrode tab 15 shown in FIG. 3 in that a slit 153 is formed.
- the description of the first embodiment is incorporated as appropriate for the other configurations.
- a slit 153 is formed between the plurality of conductive parts 151.
- the slit 153 is formed by providing a cut in the insulating portion 152 from the end face on the negative electrode current collector 13 a side toward the outer peripheral edge of the exterior members 16 and 17.
- the slit 153 is cut along the axial direction of the central axis of the conductive portion 151, and the end of the slit 153 is formed near the center of the insulating portion 152 in the axial direction.
- the width of the slit 153 is preferably 1/2 or more of the distance between the plurality of conductive parts 153 and less than the length in the width direction (direction perpendicular to the axial direction) of the conductive part 153.
- the slits 153 are formed in the insulating portion 152 from the current collectors 11 a and 13 a toward the outer peripheral edge of the exterior members 16 and 17.
- the slits 153 expand, so that the joint current of the joint portion 20 is maintained while maintaining the joint strength. It is possible to prevent the formation of wrinkles on 11a and 13a.
- the slits 153 are narrowed, so wrinkles are formed on the current collectors 11a and 13a while maintaining the bonding strength of the bonding portion 20. It can be prevented from occurring.
- the insulating portion 153 expands and contracts with a small force with respect to the stress of the current collectors 11 a and 13 a or the electrode tabs 14 and 15 at the time of welding. Is easy to stretch. Thereby, the stress load applied to the joint portion 20 can be reduced.
- FIG. 6 is a plan view showing a bonding portion between the negative electrode tab 15 and the negative electrode current collector 13a according to another embodiment of the present invention, and corresponds to FIG.
- the length of the broken line formed by the slits 153 is half or more of the length of the conductive portion 151 in the axial direction, and preferably less than the length of the insulating portion 152 along the axial direction.
- FIG. 7 is a plan view showing a bonding portion between a negative electrode tab 15 and a negative electrode current collector 13a according to another embodiment of the present invention, and corresponds to FIG.
- FIG. 8 is a cross-sectional view taken along the line BB in FIG.
- the concave portion 154 is formed between the plurality of conductive portions 151, and is formed on the main surface of the insulating portion 151 along the axial direction of the conductive portion 151. In the insulating portion 152, the thickness of the portion where the recess 154 is formed is smaller than the thickness of the portion where the recess 154 is not formed.
- the length of the recess 154 along the axial direction of the conductive part 151 is half or more of the length of the axial direction of the conductive part 151, and preferably less than the length of the insulating part 152 along the axial direction.
- the recess 152 is provided on the main surface on one side of the insulating portion 151, but as shown in FIG. 9, the recess 152 is on the main surfaces on both sides of the insulating portion 151. It may be provided in FIG. 9 is a partial cross-sectional view of the negative electrode tab 15, and corresponds to FIG.
- the slit 153 in this example corresponds to the "cut portion" in the present invention.
- FIG. 10 is a cross-sectional view of a flat-type battery according to another embodiment of the present invention, and illustration of the exterior members 16 and 17 and the power generation element 18 is omitted.
- the entire configuration of the flat battery 1 is the same as the embodiment described above with reference to FIGS. 1 and 2.
- the flat battery 1 of this example is different from the flat battery according to the first embodiment in the configuration of the bonding portions of the electrode tabs 14 and 15 and the current collectors 11 a and 11 b.
- the description of the first and second embodiments is incorporated as appropriate for the other parts.
- the flat battery 1 of this example four negative electrode plates 13 and three positive electrode plates 11 are alternately stacked.
- the two negative electrode current collectors 131a and 131b on the upper layer side are joined to the negative electrode tab 15a by welding, and the two negative electrode current collectors 131c and 131d on the lower layer side. Is joined to the negative electrode tab 15b by welding.
- the three positive electrode current collectors 11a one positive electrode current collector 111a on the upper layer side is joined to the positive electrode tab 14a by welding, and the two positive electrode current collectors 111b and 111c on the lower layer side are positive electrode tabs It is joined to 14b by welding.
- the electrode tabs 14 and 15 and the current collectors 11 a and 13 a are joined in the vicinity of the position sealed by the exterior members 16 and 17.
- the electrode tabs 14 and 15 and the current collectors 11a and 13a are joined at a position closer to the power generation element 18 than the joining position of the first embodiment.
- the electrode tabs 14 and 15 are introduced toward the current collectors 11 a and 13 a from positions sealed by the exterior members 16 and 17, and branch into upper and lower two layers in the middle of the internal space of the flat battery 1. It is done. That is, one end of the negative electrode tab 15 is branched into the negative electrode tab 15a and the negative electrode tab 15b, and the positive electrode tab 14 is branched into the positive electrode tab 14a and the positive electrode tab 14b.
- FIG. 11 is a plan view showing an enlarged bonding portion between the negative electrode tabs 15a and 15b and the negative electrode current collectors 131a, 131b, 131c and 131d, and the exterior members 16 and 17 and the power generating element 18 are not shown.
- the joint portion between the positive electrode tab 14 and the positive electrode current collector 11a is the same as that on the negative electrode side, and thus the description thereof is omitted.
- the plurality of conductive portions 151 included in the negative electrode tab 15 a and the plurality of conductive portions 151 included in the negative electrode tab 15 b are covered with the insulating portion 152, respectively. Therefore, the conductive portion 151 of the negative electrode tab 15 a and the conductive portion 151 of the negative electrode tab 15 b are respectively insulated in the internal space of the flat battery 1.
- the conductive portion 151 of the negative electrode tab 15a is bonded to the negative electrode current collectors 131a and 131b by the bonding portion 20, and the conductive portion 151 of the negative electrode tab 15b is bonded to the negative electrode current collectors 131c and 131d by the bonding portion 20. It is done.
- the insulating portion 152 is partially divided from the negative electrode current collector 13a toward the outer peripheral edge of the exterior members 16 and 17 between the conductive portion 151 of the negative electrode tab 15a and the conductive portion 151 of the negative electrode tab 15b.
- the split portion is a slit 155.
- the junction 20 is provided corresponding to the width of the current collector and the electrode tab.
- the distance between the joints 20 at both ends is increased.
- the current collector or the electrode tab is expanded and contracted by welding, the expansion and contraction in the distance between the joined portions 20 become large because the distance between the joined portions 20 at both ends is long. The load is high.
- the negative electrode current collectors 131a and 131b and the negative electrode tab 15a are joined, and the negative electrode current collectors 131c and 131d and the negative electrode tab 15b are joined.
- the positive electrode current collector 111a and the positive electrode tab 14a are joined, and the positive electrode current collectors 111b and 111c and the positive electrode tab 14b are joined. Therefore, the width of the electrode tabs 14 and 15 is branched and joined to the plurality of current collectors 131a, 131b, 131c, and 131d or the plurality of current collectors 111a, 111b, and 111c. Since the distance between the joints 20 (corresponding to the length It in FIG. 3) becomes short, the stress applied to the joints 20 can be relaxed. As a result, it is possible to prevent the generation of wrinkles in the electrode tabs 14 and 15 or the current collectors 11a and 13a and the peeling of the bonding portion 20.
- the insulating portion 152 insulates the conductive portion 151 of the negative electrode tab 15 a and the conductive portion 151 of the negative electrode tab 15 b in the internal space of the flat battery 1. Therefore, the current flowing due to the electromotive force of the power generation element 18 is conducted independently of the conductive portion 151 of the negative electrode tab 15a and the conductive portion 151 of the negative electrode tab 15b. Further, when charging the flat battery 1, the charging current can be independently supplied to the conductive portion 151 of the negative electrode tab 15a and the conductive portion 151 of the negative electrode tab 15b.
- the control portion that controls charging / discharging selects the conduction path of the conductive portion 151 connected to the external wiring of the flat-type battery 1, thereby the conductive portion 151 included in the negative electrode tab 15a. It is possible to pass current selectively.
- the charging current is not supplied to the negative electrode tab 15c joined to the short circuit or deterioration negative electrode current collector 131c. Can be controlled externally.
- the charging current can flow to the part where the short circuit or the deterioration occurs, and the voltage drop caused by the leakage can be prevented.
- the discharge current can be derived while avoiding the part where the short circuit or the deterioration occurs, so that the variation of the voltage in the flat battery 1 can be prevented.
- the insulating portion 152 is provided with a slit 155 between the conductor 151 of the negative electrode tab 15a and the conductor 151 of the negative electrode tab 15b.
- the slits 153 expand, so that the joint current of the joint portion 20 is maintained while maintaining the joint strength. It is possible to prevent the formation of wrinkles on 11a and 13a.
- the slits 153 are narrowed, so wrinkles are formed on the current collectors 11a and 13a while maintaining the bonding strength of the bonding portion 20. It can be prevented from occurring.
- the slit 155 of this example corresponds to the "cut portion" of the present invention.
- FIG. 12 is a cross-sectional view of a flat battery according to another embodiment of the present invention, and the illustration of the exterior members 16 and 17 and the power generation element 18 is omitted.
- the entire configuration of the flat battery 1 is the same as the embodiment described above with reference to FIGS. 1 and 2.
- the flat battery 1 of this example is different from the flat battery according to the first embodiment in the configuration of the bonding portions of the electrode tabs 14 and 15 and the current collectors 11 a and 13 a.
- the description of the first, second and third embodiments is incorporated as appropriate for the other parts.
- the negative electrode current collector 131a is joined to the negative electrode tab 15a by welding from the upper layer side, and from the upper layer side, the negative electrode current collector 131b is attached to the negative electrode tab 15b.
- the body 131c is joined to the negative electrode tab 15c, and the negative electrode current collector 131d is joined to the negative electrode tab 15d by welding.
- the positive electrode current collector 111a is joined from the upper layer side to the positive electrode tab 14a by welding, and from the upper layer side, the positive electrode current collector 111b is the positive electrode tab 14b.
- the positive electrode current collector 111c is joined to the positive electrode tab 14c by welding.
- the electrode tabs 14 and 15 and the current collectors 11a and 13a are joined in the vicinity of the position sealed by the exterior member.
- the electrode tabs 14 and 15 and the current collectors 11a and 13a are joined at a position closer to the power generation element 18 than the joining position of the first embodiment.
- the electrode tabs 14 and 15 are introduced toward the current collectors 11 a and 13 a from positions sealed by the exterior members 16 and 17.
- the negative electrode tab 15 is branched into four layers in the middle of the internal space of the flat battery 1, and the positive electrode tab 14 is branched into three layers in the middle of the internal space of the flat battery 1. That is, one end of the negative electrode tab 15 is branched into the negative electrode tab 15a, the negative electrode tab 15b, the negative electrode tab 15c and the negative electrode tab 15, and one end of the positive electrode tab 14 is branched into the positive electrode tab 14a, the positive electrode tab 14b and the positive electrode 14c. .
- FIG. 13 is a plan view showing an enlarged bonding portion of the negative electrode tabs 15a, 15b, 15c, 15d and the negative electrode current collectors 131a, 131b, 131c, 131d, and the exterior members 16, 17 and the power generation element 18 are illustrated. I omit it.
- the joint portion between the positive electrode tab 14 and the positive electrode current collector 11a is the same as that on the negative electrode side, and thus the description thereof is omitted.
- the plurality of conductive parts 151 included in the negative electrode tab 15 are covered with the insulating part 152, respectively. Therefore, the conductive portions 151 of the negative electrode tab 15 are respectively insulated in the internal space of the flat battery 1.
- the conductive portion 151 of the negative electrode tab 15a is bonded to the negative electrode current collector 131a by the bonding portion 20, and the other conductive portions 151 are similarly formed on the negative electrode current collectors 131b, 103c, and 103d by the bonding portion 20, respectively. It is joined.
- the negative electrode tab 15 is branched into the negative electrode tabs 15a, 15b, and 15c in accordance with the number of the plurality of negative electrode current collectors 131a, 131b, 131c, and 131d.
- the respective negative electrode tabs 15a, 15b, 15c are joined in a corresponding manner 131a, 131b, 131c, 131d.
- the slits 155 are formed between the negative electrode tabs 15a, 15b, and 15c in the insulating portion 152.
- the distance between the joint portions 20 at both ends is shortened, so that the stress applied to the joint portion 20 can be relaxed.
- the insulating portion 152 insulates between the conductive portions 151 included in the negative electrode tabs 15 a, 15 b and 15 c in the internal space of the flat battery 1. Therefore, the current flowing due to the electromotive force of the power generation element 18 conducts each of the conductive parts 151 independently.
- the control portion that controls charging / discharging selects each conductive portion 151 by selecting the conduction path of the conductive portion 151 connected to the external wiring of the flat-type battery 1, and It can flow.
- the insulating portion 152 is provided with the slits 155 between the respective conductors 151 included in the negative electrode tab 15 a.
- the slits 153 expand, so that the joint current of the joint portion 20 is maintained while maintaining the joint strength. It is possible to prevent the formation of wrinkles on 11a and 13a.
- the slits 153 are narrowed, so wrinkles are formed on the current collectors 11a and 13a while maintaining the bonding strength of the bonding portion 20. It can be prevented from occurring.
- the plurality of electrode tabs 14 and 15 and the plurality of current collectors 11 a and 13 a may be provided corresponding to and joined to each other in at least one of the positive electrode side and the negative electrode type.
- FIG. 14 is a plan view showing an enlarged bonding portion between the negative electrode tab 15 and the negative electrode current collector 13a, and illustration of the exterior members 16 and 17 and the power generation element 18 is omitted.
- the junction part of the positive electrode tab 14 and the positive electrode collector 11a is also set as the same structure.
- the negative electrode tab 15 and the three negative electrode current collectors 13a are joined by ultrasonic welding at, for example, six joint portions 20.
- the negative electrode tab 15 has a cable-shaped conductive portion 151, a different type conductive portion 156, and an insulating portion 152 covering the conductive portion 151 and the different type conductive portion 156.
- the conductive portion 151 is a flat cable of five cables, and is formed of a conductive material (conductor) such as copper.
- the dissimilar conductive portion 156 is formed of a conductive material different from the conductive portion 151, and is a cable of dissimilar metal.
- the dissimilar conductive portion 156 is formed of, for example, a conductive material such as constantan.
- the different-type conductive portion 156 is formed of a metal or a semiconductor different from the conductive portion 151. Further, the five conductors forming the conductive portion 151 and the conductor (or semiconductor) forming the dissimilar conductive portion 156 have a shape extending from the negative electrode current collector 13a toward the outer peripheral edge of the exterior members 16 and 17. ing.
- the insulating portion 152 covers the conductive portion 151 and the different-type conductive portion 156 so as to sandwich the side surfaces of the flat conductive portion 151 and the different-type conductive portion 156, and at least one of the conductive portions 151 It insulates from the dissimilar conductor portion 156.
- the negative electrode tab 15 has flexibility as a whole. At the both ends of the negative electrode tab 15, the ends of the conductive portion 151 and the different-type conductive portion 156 are exposed from the insulating portion 152. The exposed conductive portion 151 and the different-type conductive portion 156 at one end are joined to the negative electrode current collector 13 a by the bonding portion 20, and the conductive portion 151 at the other end and the different-type conductive portion 156 exposed are the flat type battery 1. Connected to the external wiring of.
- the insulating portion 152 insulates between the different-type conductive portion 156 and the conductive portion 151.
- different kind conductive part 156 and negative electrode current collector 13a become different metals each other, and there is concern of corrosion (electrolytic corrosion) by the electrolyte in joint part 20 where different metals are in contact with each other.
- a resin tape may be adhered and sealed on the joint portion 20 of the portion 156.
- the internal temperature of the flat battery 1 is detected by the conductive portion 151 and the different conductive portion 156. That is, since the conductive portion 151 and the different type conductive portion 156 are insulated in the internal space of the flat battery 1, the output current from the power generation element 18 is independent of the conductive path in the conductive portion 151 and the different type conductive portion 156. And it is conducted to the outside of the battery.
- the temperature inside the flat battery 1 is transmitted to the conductive portion 151 and the different-type conductive portion 156, and a temperature difference is generated between the conductive portion 151 and the different-type conductive portion 156.
- the different-type conductive portion 156 is formed of a conductive material different from the conductive portion 151, a voltage is generated between the conductive portion 151 and the different-type conductive portion 156 by the Seebeck effect.
- One end of the conductive portion 151 and the other end of the different-type conductive portion 156 are led to the outside from the flat battery 1. Therefore, by connecting a voltage sensor or the like to the one end and detecting a voltage, the inside of the flat battery 1 is obtained. Temperature can be detected. That is, the conductive portion 151 and the different-type conductive portion 156 serve as contact points of the voltage sensor, and the voltage sensor serves as a sensor for detecting the internal temperature of the battery.
- a temperature sensor such as a thermocouple was provided outside the battery to measure the temperature inside the battery indirectly.
- the battery exterior members 16 and 17 are provided with a heat collector and the battery temperature is detected, the temperature is indirectly measured via the exterior members 16 and 17 so that a response is made to the temperature rise inside the battery. I could not say that the sex was enough.
- the temperature inside the battery can be measured using the conductive portion 151 and the different-type conductive portion 156, compared to the case where the temperature sensor is provided outside the battery and the temperature is measured, Responsiveness can be enhanced, and detection accuracy of the internal temperature of the battery can be enhanced.
- the conductive portion 151 and the different-type conductive portion 156 are used as cables, but they need not necessarily be cables.
- thin plate-like metal tabs may be used.
- the conductive portion 151 is formed of five conductors, it is not necessary to be five, and at least the electrode tabs 14 and 15 may be formed of two or more different metals or semiconductors or metal and semiconductors. It may be formed and bonded to the current collectors 11 and 13.
- a more specific embodiment of the flat battery according to the present invention was manufactured, and the effects of the insulating portion 152 and the slit 155 were evaluated. In addition, since the effect of the different-type conductive portion 156 was evaluated, it will be described in Example 3.
- the negative electrode current collector 13a after ultrasonic welding was visually observed to evaluate the presence or absence of generation of wrinkles. Moreover, the negative electrode current collector 13a after holding for 30 minutes in a 200 degreeC thermostat was visually observed, and the presence or absence of generation
- Example 1 As in Example 1, the presence or absence of generation of wrinkles after ultrasonic welding and after 200 ° C. ⁇ 30 minutes was visually evaluated. The results are shown in Table 1.
- Comparative Example 1 the occurrence rate of wrinkles generated on the current collector immediately after ultrasonic welding was confirmed to be 60% (6 out of 10), but in Example 1, only 10%, In Example 2, it was able to reduce to 0%. Moreover, while the incidence rate of wrinkles of Comparative Example 1 increased to 100% after 200 ° C. ⁇ 30 minutes, Example 1 was suppressed to only 10% and Example 2 to 0%.
- Example 3 As shown in FIGS. 18 and 19, the negative electrode tab 15 is branched into four layers of negative electrode tabs 15a, 15b, 15c and 15d, and the negative electrode tab 15a is joined to the negative electrode current collector 131a by ultrasonic welding.
- the negative electrode current collector 131b was bonded to the negative electrode current collector 131b, the negative electrode tab 15c to the negative electrode current collector 131c, and the negative electrode tab 15d to the negative electrode current collector 131d by ultrasonic welding.
- the negative electrode tab 15 b uses the negative electrode tab shown in FIG. 14, and the negative electrode tab 15 b is provided with five conductive portions 151 and one different conductive portion 156.
- the dissimilar conductive portion 156 is formed of constantan, and is covered with a resin material together with the conductive portion 151 made of copper to form a flexible negative electrode tab 15b. Then, in the negative electrode tab 15 b, the portion in contact with the electrolytic solution is covered with the protective tape 200 in the vicinity of the bonding portion between the different-type conductive portion 156 and the conductive portion 155 next to the different-type conductive portion 156.
- the positive electrode side was provided with three positive electrode current collectors, the positive electrode tab was branched into three layers of tabs, and the three electrode tabs were welded and connected to the three positive electrode current collectors.
- the bonding portion is the same as that on the negative electrode side, except that the positive electrode tab is not provided with the different-type conductive portion 156.
- the power generation element was packed by the aluminum exterior members 15 and 16, the electrolyte was injected and sealed, and the flat battery 1 was produced.
- a steady state charging current is applied from the state of 10% of the charge state (SOC: State of Charge) of the flat type battery 1 to charge up to SOC 80%. Then, the internal temperature of the battery was measured when the SOC reached 10% steps from 10% to 80%.
- the internal temperature of the battery measures the potential difference between the different-type conductive portion 156 and the conductive portion 151 with a voltage sensor, and the detection voltage of the sensor and the Peltier coefficient based on the metal contained in the different-type conductive portion 156 and the conductive portion 151 The internal temperature was detected by calculating using. The measurement results are shown in FIG.
- Comparative Example 2 As a comparative example of Example 3, a flat-type battery was produced in which the conductive part 151 was used instead of the different-type conductive part 156, and the other parts were the same as in Example 3.
- the heat collector 300 was attached to the exterior member 16 and the external temperature of the battery was measured.
- the measurement method of the external temperature as in the third embodiment, a steady state charging current is applied from the state of SOC 10% of the flat type battery to charge up to SOC 80%. Then, the external temperature of the battery was measured when the SOC reached 10% steps from 10% to 80%. The measurement results are shown in FIG.
- FIG. 20 shows temperature characteristics relative to SOC in the flat batteries of Example 3 and Comparative Example 2, and the horizontal axis represents SOC and the vertical axis represents battery temperature.
- a circle indicates Example 3, and a triangle indicates Comparative Example 2. Note that, as described above, with respect to the SOC on the horizontal axis, since charging is performed with a constant current, the SOC rises in proportion to time. Therefore, the horizontal axis in FIG. 20 can also be viewed as a time axis.
- Example 3 As shown in FIG. 20, there was a difference between Example 3 and Comparative Example 2 when the SOC reached 80%. However, when the temperature of Comparative Example 2 after 5 minutes was measured in a state where the SOC was 80%, the detected temperature of Comparative Example 2 was 37 degrees, which is the same as Example 3. As a result, it was confirmed that the responsiveness of Example 3 to the temperature of the flat battery 1 is faster.
Abstract
Description
図3は負極タブ15と負極集電体13aとの接合部分を拡大して示す平面図であり、外装部材16、17および発電要素18の図示は省略する。なお、正極タブ14と正極集電体11aとの接合部分も同様の構成とされている。図4は、図3のA-A線に沿う断面図である。
図5は、本発明の他の実施の形態に係る負極タブ15と負極集電体13aとの接合部分を示す平面図であり、外装部材16、17および発電要素18の図示は省略する。なお、扁平型電池1全体の構成については、図1及び図2を参照して説明された上記実施形態と同じである。また、正極タブ14と正極集電体11aとの接合部分も図4と同様の構成とされている。
図10は、本発明の他の実施形態に係る扁平型電池の断面図であり、外装部材16、17および発電要素18の図示は省略する。なお、扁平型電池1全体の構成については、図1及び図2を参照して説明された上記実施形態と同じである。
図12は、本発明の他の実施形態に係る扁平型電池の断面図であり、外装部材16、17および発電要素18の図示は省略する。なお、扁平型電池1全体の構成については、図1及び図2を参照して説明された上記実施形態と同じである。
図14は負極タブ15と負極集電体13aとの接合部分を拡大して示す平面図であり、外装部材16、17および発電要素18の図示は省略する。なお、正極タブ14と正極集電体11aとの接合部分も同様の構成とされている。
なお、異種導電部156と負極集電体13aは一般に互いに異種の金属となり、異種金属同士が接する接合部20において電解質による腐食(電食)の懸念があるので、その腐食防止のために異種導電部156の接合部20上に樹脂テープを貼着してシールするようにしてもよい。
図3に示す形態の負極タブ15を用いて、図15に示すように、6カ所の接合部20で、負極タブ15と3枚の負極集電体13aとを超音波溶接により接合し、接合された負極タブ15及び負極集電体のサンプルを10個(N=10)作成した。
図13に示す形態の負極タブ15を用いて、図16に示すように、それぞれ2カ所の接合部20で、負極タブ15aと負極集電体131aとを超音波溶接により接合し、負極タブ15b及び負極集電体131b、負極タブ15c及び負極集電体131cを、溶接接合した。そして、接合された負極タブ15及び負極集電体のサンプルを10個(N=10)作成した。
実施例1及び2の比較例として、絶縁部152を有さない負極タブを用い、図17に示すように、6カ所の接合部で負極タブ15と三枚の負極集電体131a、131b、131cとを超音波溶接し、接合された負極タブ15及び負極集電体のサンプルを10個(N=10)作成した。
図18及び図19に示すように、負極タブ15を4層の負極タブ15a、15b、15c、15dに分岐し、負極タブ15aを負極集電体131aに超音波溶接により接合し、負極タブ15bを負極集電体131bに、負極タブ15cを負極集電体131cに、負極タブ15dを負極集電体131dに、超音波溶接により接合した。そして、負極タブ15bは、図14に示す負極タブを用いており、負極タブ15bは、5本の導電部151と一本の異種導電部156とを設けた。
実施例3の比較例として、異種導電部156の代わりに導電部151を用いて、他の部分は実施例3と同様にした、扁平型電池を作成した。
Claims (10)
- 外装部材の外周縁を封止して形成される内部空間に収容された発電要素と、
前記発電要素の電極板に接続された集電体と、
前記外装部材の外周縁から導出された電極タブと、を備え
前記電極タブは、前記集電体に重畳して接合される導電部と、前記導電部より伸縮性の高い材料で形成される応力緩和部を有する扁平型電池。 - 前記導電部は、前記集電体から前記外周縁に向けて延在した導体を複数有し、
前記応力緩和部は、前記複数の導体の間に形成される請求項1記載の扁平型電池。 - 前記電極タブは、前記導電部と異なる導電性材料で形成される異種導電部を有し、
前記応力緩和部は、前記導電部と前記異種導電部とを絶縁する請求項1又は2記載の扁平型電池。 - 前記導電部及び異種導電部は、前記内部空間の温度を検出するためのセンサの接点となる請求項3記載の扁平型電池。
- 前記応力緩和部には、前記集電体から前記外周縁に向けて切り込み部が形成される請求項1から4のいずれか一項に記載の扁平型電池。
- 前記応力緩和部には、前記複数の導体の間に凹部が形成される請求項2記載の扁平型電池。
- 前記内部空間には、前記集電体が複数積層されており、
前記電極タブは、前記導電部を複数有し、
前記複数の集電体のうち一の集電体は、前記複数の導電部のうち一の導電部に接合され、前記複数の集電体のうち他の集電体は、前記複数の導電部のうち他の導電部に接合される請求項1~4のいずれか一項に記載の扁平型電池。 - 前記応力緩和部は、前記一の導電部と前記他の導電部との間に形成され、かつ、切り込み部を有する請求項7記載の扁平型電池。
- 前記内部空間には、前記集電体が複数積層されており、
前記電極タブは、前記導電部を、前記複数の集電体に対応させて複数有し、
前記複数の集電体は、前記複数の導電部に、対応させて接合される請求項1~4のいずれか一項に記載の扁平型電池。 - 前記応力緩和部は、前記複数の導電部の間を絶縁する請求項7~9のいずれか一項に記載の扁平型電池。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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US13/643,657 US9257692B2 (en) | 2010-04-28 | 2011-04-19 | Flat-type battery |
CN201180020893.0A CN102859758B (zh) | 2010-04-28 | 2011-04-19 | 扁平型电池 |
BR112012027656A BR112012027656A2 (pt) | 2010-04-28 | 2011-04-19 | bateria do tipo plana |
KR1020127028093A KR101512549B1 (ko) | 2010-04-28 | 2011-04-19 | 편평형 전지 |
EP11774873.1A EP2565964B1 (en) | 2010-04-28 | 2011-04-19 | Flat-type battery |
RU2012150793/07A RU2520575C1 (ru) | 2010-04-28 | 2011-04-19 | Батарея плоского типа |
MX2012012442A MX2012012442A (es) | 2010-04-28 | 2011-04-19 | Bateria tipo plana. |
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JP2010103161A JP5589534B2 (ja) | 2010-04-28 | 2010-04-28 | 扁平型電池 |
JP2010-103161 | 2010-04-28 |
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EP (1) | EP2565964B1 (ja) |
JP (1) | JP5589534B2 (ja) |
KR (1) | KR101512549B1 (ja) |
CN (1) | CN102859758B (ja) |
BR (1) | BR112012027656A2 (ja) |
MX (1) | MX2012012442A (ja) |
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CN106143781A (zh) * | 2016-07-05 | 2016-11-23 | 台州市全顺电机有限公司 | 一种可调传动结构及动力总成 |
Also Published As
Publication number | Publication date |
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CN102859758A (zh) | 2013-01-02 |
CN102859758B (zh) | 2015-05-13 |
TW201222942A (en) | 2012-06-01 |
KR20130031253A (ko) | 2013-03-28 |
TWI466366B (zh) | 2014-12-21 |
JP5589534B2 (ja) | 2014-09-17 |
RU2012150793A (ru) | 2014-06-10 |
US20130045402A1 (en) | 2013-02-21 |
BR112012027656A2 (pt) | 2016-08-16 |
EP2565964B1 (en) | 2018-02-21 |
KR101512549B1 (ko) | 2015-04-15 |
US9257692B2 (en) | 2016-02-09 |
JP2011233385A (ja) | 2011-11-17 |
RU2520575C1 (ru) | 2014-06-27 |
MX2012012442A (es) | 2012-11-21 |
EP2565964A4 (en) | 2014-06-11 |
EP2565964A1 (en) | 2013-03-06 |
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