CN105428660A - Ultrathin lithium ion battery current collector, ultrathin lithium ion battery and preparation method - Google Patents

Ultrathin lithium ion battery current collector, ultrathin lithium ion battery and preparation method Download PDF

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Publication number
CN105428660A
CN105428660A CN201511008931.7A CN201511008931A CN105428660A CN 105428660 A CN105428660 A CN 105428660A CN 201511008931 A CN201511008931 A CN 201511008931A CN 105428660 A CN105428660 A CN 105428660A
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negative
layer
lithium ion
metal composite
ion battery
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曾石华
吴伟兴
何家明
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GUANGZHOU FULLRIVER BATTERY NEW TECHNOLOGY Co Ltd
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GUANGZHOU FULLRIVER BATTERY NEW TECHNOLOGY Co Ltd
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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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/665—Composites
    • H01M4/667—Composites in the form of layers, e.g. coatings
    • 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
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • 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
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • 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
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention provides an ultrathin lithium ion battery current collector. The current collector is a metal composite foil. The metal composite foil at least comprises an easy-tin-soldering layer made of an easy-tin-soldering material and a current collection conducting layer. The current collection conducting layer is one of an aluminum layer, an aluminum alloy layer, a titanium layer, a titanium alloy layer or a chromium layer. The easy-tin-soldering layer and the current collection conducting layer are combined into one. Because the metal composite foil comprises the easy-tin-soldering material and the current collection conducting layer, the metal composite foil can be employed as a packaging film of an ultrathin lithium ion battery, the easy-tin-soldering layer can perform supersonic wave point welding, laser point welding, alternating current point welding, direct current point welding or tin soldering, the welding modes are developed, the solderability is high, and the metal composite foil is convenient to use for users. When tin soldering is employed, welding of a connection sheet is not needed, operations are reduced, the qualified rate is high, and the labor cost is low. The invention also provides an ultrathin lithium ion battery using the ultrathin lithium ion battery current collector and a preparation method. The provided ultrathin lithium ion battery can solve the welding and cracking problems in the prior art effectively, and has good economic benefits.

Description

Ultrathin lithium ion battery collector, ultrathin lithium ion battery and manufacture method thereof
Technical field
The present invention relates to secondary battery technology, particularly a kind of ultrathin lithium ion battery collector, ultrathin lithium ion battery and manufacture method thereof.
Background technology
Ultrathin lithium ion battery, as a kind of ultrathin lithium ion battery that Chinese patent literature CN202503073U introduces, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body, positive pole cream, positive pole ear forms, plus plate current-collecting body adopts titanium foil or titanium alloy foil or lead foil, positive pole cream coheres on plus plate current-collecting body, plus plate current-collecting body is directly extended out positive pole ear, negative plate comprises negative current collector, negative pole cream, negative lug forms, negative current collector adopts stainless steel foil or Copper Foil or nickel foil or titanium foil or titanium alloy foil or lead foil, negative pole cream coheres on negative current collector, negative current collector directly draws negative lug, collector is double does packaging film, hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion, be suitable for ultrathin lithium ion battery formation system, chemical synthesizing method disclosed in Chinese patent literature CN103779613A to carry out changing into and making resultant battery.
From the common practise of this area, in industry, the aluminium foil of conventional 12 ~ 20 micron thickness is as anode current collector of lithium ion battery, but because conventional aluminium foil intensity is low, hardness is low, fusing point is low, easily wear and easily split, aluminium foil local pressure break or local internal stress can be caused during electrode compressing tablet to strengthen, there is electrochemistry spot corrosion or stress corrosion in the battery that does, is difficult to do packaging film as collector is double; Load after card, be difficult to by ISO7816 standard testing, bending 1000 times or distortion 1000 meetings cause battery aluminium foil cracking damage; Aluminium foil can adopt ultrasonic bond or Laser Welding, AC spot-welding can not be adopted, DC spot welding can not be adopted, can not soldering be adopted, need leading super weldering or laser welding of nickel sheet on lug to adopt soldering, use to user and bring restriction, operation is caused to increase, qualification rate declines, and cost of labor increases, and has that lug converting interface is partially thick, off normal, easily broken defect.
According to the technical scheme of Chinese patent literature CN202503073U, in actual production and application process, also find following shortcoming:
1. Welding Problems: titanium foil, titanium alloy foil, lead foil can spot welding or ultrasonic bond or Laser Welding, can not soldering, uses bring restriction to user; To need on lug leading spot welding or ultrasonic bond or laser welding of nickel sheet could soldering, cause operation to increase, qualification rate declines, and cost of labor increases.
2. problem of Cracking: the ultrathin lithium ion battery scope of application that titanium foil, titanium alloy foil, lead foil do is restricted, because some liquid electrolyte can corrode titanium foil or titanium alloy foil or the lead foil adhesive interface with hot melt cushion rubber, cause seal durability inadequate, titanium foil or titanium alloy foil or lead foil is caused to ftracture with the adhesive interface of hot melt cushion rubber, cause battery failure, affect storage life and useful life; Even if employ the process such as physical oil-removing, electrochemical deoiling, ultrasonic oil removing, chemical oxidation (passivation), problem of Cracking when using liquid electrolyte still can not be solved; Titanium foil, titanium alloy foil, lead foil are relatively applicable to the ultrathin lithium ion battery of solid electrolyte or gel electrolyte, can not adapt to the ultrathin lithium ion battery of all liquid electrolytes.
Chinese patent literature CN1557029 describes a kind of flexible thin and manufacture method thereof, mainly introduces the structure of flexible thin, and ground floor is adhesive layer, and the second layer is protective layer, and third layer is conductive layer, and third layer is clipped between ground floor and the second layer; Its impervious metal foil layer can be the metal of any kind, such as, as aluminium, nickel, copper and stainless steel; What introduce is primary cell, does not relate to charging.This invention do not consider concrete foil do flexible thin ease for use in use; Battery has all had the protective layer of the second layer, and the insulation of battery appearance major part, disclosed in inapplicable Chinese patent literature CN103779613A, ultrathin lithium ion battery formation system, chemical synthesizing method carry out changing into and making resultant battery.
In sum, existing ultrathin lithium ion battery positive pole and negative pole single material collector used are held concurrently packaging film, there is solderability difference, intensity is low, durability is low and corrosion-resistant etc. is difficult to the defect simultaneously taken into account, affects production and the application of ultrathin lithium ion battery.
Summary of the invention
For the ease of understanding, below several scientific and technical terminology of the present invention is defined:
Simple metal paper tinsel: the metal forming of the individual layer that single metallic element is made; Allow containing inevitable impurity element; Such as Copper Foil and aluminium foil.
Single metal forming: the metal forming of the individual layer that single metallic element or alloy are made, comprises simple metal paper tinsel and Alloy Foil; Such as nickel foil and stainless steel foil.
Metal composite foils: by the metal forming of more than 2 layers or 2 layers different metal layers or the compounded bilayer of alloying metal layer or multilayer; Example 1 aluminium-nickel metal composite foils, one side is aluminium, and one side is nickel; Example 2 aluminium-stainless steel metal composite insulating foil, one side is aluminium, and one side is stainless steel; Example 3 aluminium-Ni-Fe-nickel metal composite foils is the composite insulating foil of iron foil through Rolling compund that aluminium follows double side nickel-plated, and one side is aluminium, and one side is nickel, and there are one deck nickel and one deck iron in centre.The compound between different metal is represented with connector "-".
Between metal composite foils different layers of the present invention, material composition is discontinuous, and adjacent 2 layers of composition are different (except special circumstances: except aluminium alloy-Al-alloy metal composite insulating foil, aluminium-aluminum metal composite insulating foil); Same layer material composition is continuous print, and composition is identical; " layer " herein refers to the metal level in metal composite foils, and namely metal composite foils comprises the metal level of more than 2 layers; " compound " refers to the production technology of the metal composite foils described in formation; Can be such as different metal levels be the thin metal layer obtained by rolling metal, 2 kinds (or more) this thin metal layer form metal composite foils by rolling, at this moment " compound " refers to " rolling " technique; And for example, a kind of thin metal layer forms another layer of thin metal layer by the mode of plating or Vacuum Deposition, obtains metal composite foils, at this moment " compound " refers to " plating or Vacuum Deposition " technique.
In order to solve solderability difference problem, the invention provides a kind of new ultrathin lithium ion battery collector: the double packaging film doing ultrathin lithium ion battery of this collector, this collector is metal composite foils, this metal composite foils at least comprises the easy soldering layer and afflux conductive layer that easy soldering material makes, and afflux conductive layer is the one in aluminium lamination, aluminium alloy layer, titanium layer, titanium alloy layer or layers of chrome; Easy soldering layer and afflux conductive layer are combined into one.
Because metal composite foils comprises easy soldering layer and afflux conductive layer, it doublely can do the packaging film of ultrathin lithium ion battery, easy soldering layer can ultrasonic spot welding, laser spot welding, AC spot-welding, DC spot welding or soldering, expanded the mode of welding, solderability is good, is user-friendly to; When adopting soldering, the battery that does need not weld switching piece, and operation reduces, and qualification rate is high, and cost of labor is low; Do not have that lug converting interface is partially thick, off normal, easily broken defect.Because metal composite foils adopts two or more metal level or alloy-layer to be composited, the intensity of battery afflux liquid and durability increase, can not bore a hole or tear in use procedure, there will not be local pressure break or local internal stress excessive situation during electrode compressing tablet, avoid the generation of electrochemistry spot corrosion or stress corrosion.
Preferably, described afflux conductive layer is aluminium lamination or aluminium alloy layer, and described easy soldering layer is the one in nickel dam, nickel alloy layer, Copper Foil, copper alloy layer, silver layer, ag alloy layer, iron layer, iron alloy layer or stainless steel layer, described metal composite foils is: aluminium-nickel metal composite foils, aluminum-nickel alloy metal composite foils, aluminium alloy-nickel metal composite foils, aluminium alloy-nickel alloy composite insulating foil, Solder for Al-Cu Joint Welding metal composite foils, Al-zn-mg-cu alloy metal composite foils, aluminium alloy-copper metal composite foils, aluminium alloy-copper alloy metal composite insulating foil, aluminium-silver metal composite insulating foil, aluminium-silver alloy composite insulating foil, aluminium alloy-silver metal composite insulating foil, aluminium alloy-silver alloy composite insulating foil, aluminium-ferrous metal composite insulating foil, aluminum-iron alloy metal composite foils, aluminium alloy-ferrous metal composite insulating foil, aluminium alloy-ferro-alloy metal composite insulating foil, aluminium-stainless steel metal composite insulating foil, aluminium alloy-stainless steel metal composite insulating foil.
When making ultrathin lithium ion battery with aluminous layer described in epimere or aluminium alloy layer as plus plate current-collecting body and/negative current collector, positive electrode cream is bonded on this face, aluminium lamination or aluminium alloy layer energy long-lasting tolerance liquid electrolyte corrode, can effectively prevent electrolyte from corroding the rubberizing face of collector and hot melt cushion rubber, effectively enhance seal durability, extend storage life and the useful life of ultrathin lithium ion battery; When making ultrathin lithium ion battery by the metal composite foils of aluminous layer described in epimere or aluminium alloy layer as negative current collector, negative electrode cream can be bonded on non-aluminium lamination or non-aluminum alloy layer; When making ultrathin lithium ion battery by the metal composite foils of aluminous layer described in epimere or aluminium alloy layer as negative current collector, negative electrode cream also can be bonded in aluminium lamination or aluminium alloy aspect, and negative electrode active material should be lithium titanate.Therefore, the ultrathin lithium ion battery that above-mentioned three kinds of schemes make is applicable to the ultrathin lithium ion battery using liquid electrolyte, gel state electrolyte or solid electrolyte; Welding Problems and problem of Cracking can also be solved simultaneously.
Described afflux conductive layer is titanium layer or titanium alloy layer, described metal composite foils can also be: titanium-nickel metal composite foils, titanium-nickel alloy composite insulating foil, titanium-cuprum metallic composite insulating foil, titanium-copper alloy metal composite insulating foil, titanium-silver metal composite insulating foil, titanium-silver alloy composite insulating foil, titanium-ferrous metal composite insulating foil, titanium-ferro-alloy metal composite insulating foil, titanium-stainless metal composite foils, titanium alloy-nickel metal composite foils, titanium alloy-nickel alloy composite insulating foil, titanium alloy-copper metal composite foils, titanium alloy-copper alloy metal composite insulating foil, titanium alloy-silver metal composite insulating foil, titanium alloy-silver alloy composite insulating foil, titanium alloy-ferrous metal composite insulating foil, titanium alloy-ferro-alloy metal composite insulating foil, titanium alloy-stainless steel metal composite insulating foil.
When making ultrathin lithium ion battery by the metal composite foils of titanium-containing layer described in epimere or titanium alloy layer as plus plate current-collecting body, positive electrode cream is bonded in titanium layer or titanium alloy aspect.When making ultrathin lithium ion battery by the metal composite foils of titanium-containing layer described in epimere or titanium alloy layer as negative current collector, negative electrode cream can be bonded on non-titanium layer or non-titanium alloy layer; When making ultrathin lithium ion battery by the metal composite foils of titanium-containing layer described in epimere or titanium alloy layer as negative current collector, negative electrode cream also can be bonded in titanium layer or titanium alloy aspect; Go for the ultrathin lithium ion battery using gel state electrolyte or solid electrolyte, but be not suitable for the ultrathin lithium ion battery using liquid electrolyte.The ultrathin lithium ion battery that above-mentioned three kinds of schemes make, can solve Welding Problems.
Described metal composite foils can also be: chromium-nickel metal composite foils, chromium-nickel alloy metal composite foils, chromium-copper metal composite foils, chromium-copper alloy metal composite insulating foil, chromium-silver metal composite insulating foil, chromium-silver alloy composite insulating foil, chromium-ferrous metal composite insulating foil, chromium-ferro-alloy metal composite insulating foil, chromium-stainless steel metal composite insulating foil.
When making ultrathin lithium ion battery by the metal composite foils of chrome-containing layer described in epimere as plus plate current-collecting body, positive pole cream is bonded on layers of chrome face; When making ultrathin lithium ion battery by the metal composite foils of chrome-containing layer described in epimere as negative current collector, negative electrode cream can be bonded in non-chromium aspect; When making ultrathin lithium ion battery by the metal composite foils of chrome-containing layer described in epimere as negative current collector, negative electrode cream also can be bonded on layers of chrome face; Go for the ultrathin lithium ion battery using gel state electrolyte or solid electrolyte, but be not suitable for the ultrathin lithium ion battery using liquid electrolyte.The ultrathin lithium ion battery that above-mentioned three kinds of schemes make, can solve Welding Problems.
Can also at least compound layer of metal layer between easy soldering layer and afflux conductive layer, intensity and the durability of metal composite foils can be strengthened so further.
Adopt Rolling compund or composite electroplated or Vacuum Deposition compound between described metal composite foils different metal layer, when metal level has more than three layers, one or more complex method above-mentioned can be used to carry out compound.Also other can be used method of compound can to carry out compound.
Can not corrode by long-lasting tolerance liquid electrolyte to solve titanium foil, titanium alloy foil and lead foil rubberizing interface, and cause the shortcoming of easily cracking, the invention provides another kind of new ultrathin lithium ion battery collector: the double packaging film doing ultrathin lithium ion battery of this collector, this collector is metal composite foils, this metal composite foils at least comprises corrosion-resistant conductive layer and strengthens composite bed, enhancing composite bed is the one in titanium layer, titanium alloy layer, layers of chrome, aluminium lamination or aluminium alloy layer, and corrosion-resistant conductive layer is aluminium lamination or aluminium alloy layer; Corrosion-resistant conductive layer and enhancing composite bed are combined into one; Described metal composite foils is: titanium-aluminum metal composite insulating foil, Ti-Al alloy metal composite foils, titanium alloy-aluminum metal composite insulating foil, titanium alloy-Al-alloy metal composite insulating foil, chromium-aluminum metal composite insulating foil, chromium-aluminium alloy metal composite foils, aluminium-Al-alloy metal composite insulating foil, aluminium alloy-Al-alloy metal composite insulating foil.The anti-corrosion capability of corrosion-resistant conductive layer is that this layer corrodes with the laminating interface energy long-lasting tolerance liquid electrolyte after the laminating of hot melt cushion rubber, is not easy cracking.The effect strengthening composite bed is the intensity increasing metal composite foils after following corrosion-resistant conductive layer compound, prevents or reduces in use procedure the generation of ftractureing, boring a hole, rupturing.Especially aluminium, aluminium gold close also can compound of the same race, i.e. aluminium foil and alloy foil.
When making ultrathin lithium ion battery by the metal composite foils of aluminous layer described in epimere or aluminium alloy layer as plus plate current-collecting body, positive electrode cream is bonded in aluminium lamination or aluminium alloy aspect, aluminium lamination or aluminium alloy layer energy long-lasting tolerance liquid electrolyte corrode, can effectively prevent electrolyte from corroding the rubberizing face of collector and hot melt cushion rubber, effectively enhance seal durability, extend storage life and the useful life of ultrathin lithium ion battery; When making ultrathin lithium ion battery by the metal composite foils of aluminous layer described in epimere or aluminium alloy layer as negative current collector, negative electrode cream can be bonded in aluminium lamination or aluminium alloy aspect, and negative electrode active material should be lithium titanate; Go for the ultrathin lithium ion battery using liquid electrolyte, also go for the ultrathin lithium ion battery using gel state electrolyte or solid electrolyte.When making ultrathin lithium ion battery by the metal composite foils of aluminous layer described in epimere or aluminium alloy layer as plus plate current-collecting body, positive electrode cream can be bonded on non-aluminium lamination or non-aluminum alloy layer; When making ultrathin lithium ion battery by the metal composite foils of aluminous layer described in epimere or aluminium alloy layer as negative current collector, negative electrode cream can be bonded on non-aluminium lamination or non-aluminum alloy layer, and negative electrode active material can be material with carbon element or lithium titanate; Be applicable to the ultrathin lithium ion battery using gel state electrolyte or solid electrolyte.Problem of Cracking can be solved with the ultrathin lithium ion battery that above-mentioned four kinds of schemes make.
Also at least compound layer of metal layer between described corrosion-resistant conductive layer and afflux conductive layer, can strengthen intensity and the durability of metal composite foils so further.
Rolling compund or composite electroplated or Vacuum Deposition compound is adopted between described metal composite foils different metal layer.When metal level has more than three layers, one or more complex method above-mentioned can be used to carry out compound.Also other can be used method of compound can to carry out compound.
Present invention also offers a kind of ultrathin lithium ion battery, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, and hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion; Plus plate current-collecting body and negative current collector all use the above-mentioned metal composite foils with easy soldering layer, and positive pole cream is bonded on the afflux conductive layer of plus plate current-collecting body; Negative pole cream can be bonded in any surface of negative current collector, is preferably bonded in the easy soldering layer of negative current collector, and the assembling anode ear of ultrathin lithium ion battery out and the easy soldering layer of negative electrode lug are in the same face like this, and more convenient user uses.It should be noted that, the afflux conductive layer that negative pole cream is bonded in negative current collector be aluminium lamination or aluminium alloy layer time, negative pole cream active material should be lithium titanate.The ultrathin lithium ion battery that this programme provides, the collector of both positive and negative polarity, all containing the metal composite foils of easy soldering layer, can solve Welding Problems.
Another kind of ultrathin lithium ion battery provided by the invention, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, and hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion; Plus plate current-collecting body uses the above-mentioned metal composite foils with easy soldering layer, and positive pole cream is bonded on the afflux conductive layer of plus plate current-collecting body, negative current collector is the one in Copper Foil, copper alloy foil, nickel foil, nickel alloy foil, silver foil, silver alloy paper tinsel, iron foil, ferroalloy paper tinsel, stainless steel foil.The positive pole Collective Flow that this programme provides is metal composite foils, and negative current collector is the metal forming of single easy soldering, and this scheme solves Welding Problems, and save cost, is optimal case.
Another kind of ultrathin lithium ion battery provided by the invention, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, and hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion; Plus plate current-collecting body uses the one in aluminium foil, alloy foil, titanium foil, titanium alloy foil, lead foil; Negative current collector uses the above-mentioned metal composite foils with easy soldering layer, and negative pole cream is bonded on the afflux conductive layer of negative current collector.The plus plate current-collecting body of this programme is single metal forming, and negative current collector is the metal composite foils containing easy soldering layer, and the easy soldering of negative current collector, solves part Welding Problems, can meet the special requirement of user.
Above-mentioned three kinds of ultrathin lithium ion batteries, adopt collective's fluid that metal composite foils is done, because metal composite foils comprises easy soldering layer and afflux conductive layer, easy soldering layer can ultrasonic spot welding, laser spot welding, AC spot-welding, DC spot welding or soldering, expand the mode of welding, solderability is good, is user-friendly to; When adopting soldering, need not weld switching piece, not have that lug converting interface is partially thick, off normal, easily broken defect, operation reduces, and qualification rate is high, and cost of labor is low.
When with aluminium lamination or the aluminium alloy layer afflux conductive layer as plus plate current-collecting body and/negative current collector, when making ultrathin lithium ion battery, electrode cream is bonded on this face, aluminium lamination or aluminium alloy layer energy long-lasting tolerance liquid electrolyte corrode, can effectively prevent electrolyte from corroding the rubberizing face of collector and hot melt cushion rubber, effectively enhance seal durability, extend storage life and the useful life of ultrathin lithium ion battery; Go for the ultrathin lithium ion battery using liquid electrolyte, gel state electrolyte or solid electrolyte, Technological adaptability is strong, and this programme can solve problem of Cracking simultaneously.
Another kind of ultrathin lithium ion battery provided by the invention, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, and hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion; Plus plate current-collecting body and negative current collector all use the above-mentioned metal composite foils with corrosion-resistant conductive layer; And positive pole cream is bonded on the corrosion-resistant conductive layer of plus plate current-collecting body, and negative pole cream is bonded on the corrosion-resistant conductive layer of negative current collector.This programme effectively can solve problem of Cracking.
Another kind of ultrathin lithium ion battery provided by the invention, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body corrosion-resistant conductive layer, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, and hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion; Plus plate current-collecting body uses the above-mentioned metal composite foils with corrosion-resistant conductive layer, and negative current collector is the one in Copper Foil, copper alloy foil, nickel dam, nickel alloy foil, silver foil, silver alloy paper tinsel, iron foil, ferroalloy paper tinsel, stainless steel foil; Positive pole cream is bonded on the corrosion-resistant conductive layer of plus plate current-collecting body.This programme effectively can solve problem of Cracking.
Above-mentioned two kinds of ultrathin lithium ion batteries, adopt metal composite foils that titanium foil, titanium alloy foil or lead foil and aluminium foil or alloy foil are formed as plus plate current-collecting body and negative current collector, or as plus plate current-collecting body, and negative current collector is the one in Copper Foil, copper alloy foil, nickel foil, nickel alloy foil, silver foil, silver alloy paper tinsel, iron foil, ferroalloy paper tinsel, stainless steel foil; Or, employing aluminium-Al-alloy metal composite insulating foil, aluminium alloy-Al-alloy metal composite insulating foil replace above-mentioned metal composite foils, utilize the characteristic that aluminium foil or alloy foil energy long-lasting tolerance liquid electrolyte corrode, solve titanium foil, titanium alloy foil and lead foil rubberizing interface can not corrode by long-lasting tolerance liquid electrolyte, and cause the problem of easily cracking; Effectively can prevent electrolyte from corroding the rubberizing face of collector and hot melt cushion rubber, effectively enhance seal durability, extend storage life and the useful life of ultrathin lithium ion battery; Go for the ultrathin lithium ion battery using liquid electrolyte, gel state electrolyte or solid electrolyte, Technological adaptability is strong.
Above-mentioned five kinds of ultrathin lithium ion batteries provided by the invention, because metal composite foils adopts two or more metal or alloy, the intensity of positive plate and negative plate and durability increase, can not bore a hole or tear in use procedure, there will not be local pressure break or local internal stress excessive situation during electrode compressing tablet, avoid the generation of electrochemistry spot corrosion or stress corrosion; Effectively can increase the security performance of battery, increase the service life.
The plus plate current-collecting body of ultrathin lithium ion battery and negative current collector can use above-mentioned ultrathin lithium ion battery collector simultaneously, also metal composite foils can be used by plus plate current-collecting body, negative pole uses single metal forming, or positive pole uses single metal forming, and negative pole uses above-mentioned ultrathin lithium ion battery collector.Because metal composite needs cost, the thickness after compound is often greater than the thickness of single metal forming, so in most cases only need plus plate current-collecting body to use metal composite foils, the aluminium face of metal composite foils or aluminium alloy face or titanium face or titanium alloy face or chromium face are coated with positive pole cream.Certainly, negative pole can use single metal forming or metal composite foils, negative pole with single metal forming can be Copper Foil, copper alloy foil, nickel foil, nickel alloy foil, silver foil, silver alloy paper tinsel, titanium foil, titanium alloy foil, lead foil, stainless steel foil wherein any one; During negative pole composite metallic material, can be coated with negative pole cream in any surface of metal composite foils, when aluminium face or aluminium alloy face are selected in negative pole painting cream face, negative electrode active material should be lithium titanate.
Easy soldering layer is nickel dam, nickel alloy layer, layers of copper, copper alloy layer, silver layer, ag alloy layer, iron layer, iron alloy layer or stainless steel layer, these easy soldering layers between two or MULTILAYER COMPOSITE, be used as negative current collector and double as packaging film, it is identical or equivalent for being used as with respective single metal forming the effect that negative current collector doubles as packaging film.
The present invention also provides a kind of ultrathin lithium ion battery manufacture method, and its plus plate current-collecting body, or/and negative current collector uses above-mentioned metal composite foils, doublely does packaging film.When making ultrathin lithium ion battery, before use metal composite foils, need to carry out oil removing, activation, Passivation Treatment to metal composite foils, strengthen the bonding force of metal composite foils and hot melt cushion rubber; Use the situation of single metal forming, also need to carry out oil removing, activation, Passivation Treatment to single metal forming.
Traditional lithium-ion battery does collector without metal composite foils, the plus plate current-collecting body of traditional lithium-ion battery is aluminium foil or alloy foil, and negative current collector is Copper Foil, and collector only makes collector function, not doubling as wrapping film, originally using metal composite foils without the need to increasing into.Ultrathin lithium ion battery collector doubles as wrapping film, need the shortcoming overcoming single metal forming, take into account the factors such as resistance, adhesiveness, durability, corrosion resistance, intensity, solderability, be necessary to use metal composite foils of the present invention, make it have different functions towards inside battery from towards outside batteries; Ultrathin lithium ion battery materials are few, and the cost that therefore metal composite foils of the present invention increases is worth relative to the function obtained and efficiency.
Accompanying drawing explanation
Fig. 1 is the profile of ultrathin lithium ion battery of the present invention
Fig. 2 is the front view of ultrathin lithium ion battery of the present invention
Embodiment
Embodiment one: the metal composite foils having easy soldering layer
The ultrathin lithium ion battery collector of present embodiment, the double packaging film doing ultrathin lithium ion battery of this collector, this collector is metal composite foils, this metal composite foils at least comprises the easy soldering layer and afflux conductive layer that easy soldering material makes, and afflux conductive layer is the one in aluminium lamination, aluminium alloy layer, titanium layer, titanium alloy layer or layers of chrome; Easy soldering layer and afflux conductive layer are combined into one.
Described easy soldering layer is the one in nickel dam, nickel alloy layer, layers of copper, copper alloy layer, silver layer, ag alloy layer or iron layer, iron alloy layer or stainless steel foil, described metal composite foils is: aluminium-nickel metal composite foils, aluminum-nickel alloy metal composite foils, aluminium alloy-nickel metal composite foils, aluminium alloy-nickel alloy composite insulating foil, Solder for Al-Cu Joint Welding metal composite foils, Al-zn-mg-cu alloy metal composite foils, aluminium alloy-copper metal composite foils, aluminium alloy-copper alloy metal composite insulating foil, aluminium-silver metal composite insulating foil, aluminium-silver alloy composite insulating foil, aluminium alloy-silver metal composite insulating foil, aluminium alloy-silver alloy composite insulating foil, aluminium-ferrous metal composite insulating foil, aluminum-iron alloy metal composite foils, aluminium alloy-ferrous metal composite insulating foil, aluminium alloy-ferro-alloy metal composite insulating foil, aluminium-stainless steel metal composite insulating foil, aluminium alloy-stainless steel metal composite insulating foil.
When making ultrathin lithium ion battery with the aluminium lamination described in epimere or aluminium alloy layer as plus plate current-collecting body, positive pole cream is bonded on this face, aluminium lamination or aluminium alloy layer energy long-lasting tolerance liquid electrolyte corrode, can effectively prevent electrolyte from corroding the rubberizing face of collector and hot melt cushion rubber, effectively enhance seal durability, extend storage life and the useful life of ultrathin lithium ion battery; When making ultrathin lithium ion battery by the metal composite foils of aluminous layer described in epimere or aluminium alloy layer as negative current collector, negative electrode cream can be bonded on non-aluminium lamination or non-aluminum alloy layer; When making ultrathin lithium ion battery by the metal composite foils of aluminous layer described in epimere or aluminium alloy layer as negative current collector, negative electrode cream can be bonded in aluminium lamination or aluminium alloy aspect, and negative electrode active material should be lithium titanate; Above-mentioned three kinds of ultrathin lithium ion batteries are applicable to the ultrathin lithium ion battery using liquid electrolyte, gel state electrolyte or solid electrolyte.
Described metal composite foils can also be: titanium-nickel metal composite foils, titanium-nickel alloy composite insulating foil, titanium-cuprum metallic composite insulating foil, titanium-copper alloy metal composite insulating foil, titanium-silver metal composite insulating foil, titanium-silver alloy composite insulating foil, titanium-ferrous metal composite insulating foil, titanium-ferro-alloy metal composite insulating foil, titanium-stainless metal composite foils, titanium alloy-nickel metal composite foils, titanium alloy-nickel alloy composite insulating foil, titanium alloy-copper metal composite foils, titanium alloy-copper alloy metal composite insulating foil, titanium alloy-silver metal composite insulating foil, titanium alloy-silver alloy composite insulating foil, titanium alloy-ferrous metal composite insulating foil, titanium alloy-ferro-alloy metal composite insulating foil, titanium alloy-stainless steel metal composite insulating foil.
When making ultrathin lithium ion battery by the metal composite foils of titanium-containing layer described in epimere or titanium alloy layer as plus plate current-collecting body, positive electrode cream is bonded in titanium layer or titanium alloy aspect; When making ultrathin lithium ion battery by the metal composite foils of titanium-containing layer described in epimere or titanium alloy layer as negative current collector, negative electrode cream can be bonded on non-titanium layer or non-titanium alloy layer; When making ultrathin lithium ion battery by the metal composite foils of titanium-containing layer described in epimere or titanium alloy layer as negative current collector, negative electrode cream also can be bonded in titanium layer or titanium alloy aspect; Go for the ultrathin lithium ion battery using gel state electrolyte or solid electrolyte, but be not suitable for the ultrathin lithium ion battery using liquid electrolyte.
Described metal composite foils can also be: chromium-nickel metal composite foils, chromium-nickel alloy metal composite foils, chromium-copper metal composite foils, chromium-copper alloy metal composite insulating foil, chromium-silver metal composite insulating foil, chromium-silver alloy composite insulating foil, chromium-ferrous metal composite insulating foil, chromium-ferro-alloy metal composite insulating foil, chromium-stainless steel metal composite insulating foil.
When making ultrathin lithium ion battery by the metal composite foils of chrome-containing layer described in epimere as plus plate current-collecting body, positive electrode cream is bonded on layers of chrome face; When making ultrathin lithium ion battery by the metal composite foils of chrome-containing layer described in epimere as negative current collector, negative electrode cream can be bonded in non-chromium aspect; When making ultrathin lithium ion battery by the metal composite foils of chrome-containing layer described in epimere as negative current collector, negative electrode cream also can be bonded on layers of chrome face; Go for the ultrathin lithium ion battery using gel state electrolyte or solid electrolyte, but be not suitable for the ultrathin lithium ion battery using liquid electrolyte.
Because metal composite foils comprises easy soldering layer and afflux conductive layer, it doublely can do the packaging film of ultrathin lithium ion battery, soldering layer can ultrasonic spot welding, laser spot welding, AC spot-welding, DC spot welding or soldering, expanded the mode of welding, solderability is good, is user-friendly to; When adopting soldering, the battery that does need not weld switching piece, and operation reduces, and qualification rate is high, and cost of labor is low; Do not have that lug converting interface is partially thick, off normal, easily broken defect.Because metal composite foils adopts two or more metal forming or Alloy Foil to be composited, the intensity of battery afflux liquid and durability increase, can not bore a hole or tear in use procedure, there will not be local pressure break or local internal stress excessive situation during electrode compressing tablet, avoid the generation of electrochemistry spot corrosion or stress corrosion.
As a kind of improvement project, can also at least compound layer of metal layer between easy soldering layer and afflux conductive layer, intensity and the durability of metal composite foils can be strengthened so further.
The two sides of metal composite foils is topmost, the different metal level of some layers can be added in centre, increase the metal level that the some layers of compound are different between metal composite foils two sides, respective effect is identical, can be used for the ultrathin lithium ion battery that making metal composite foils is done equally; But it is more much more complicated to add the number of plies, and cost is higher, and thickness is thicker, therefore preferably two-layer metal composite foils.
Adopt Rolling compund or composite electroplated or Vacuum Deposition compound between described metal composite foils different metal layer, when metal level has more than three layers, one or more complex method above-mentioned can be used to carry out compound.Also other can be used method of compound can to carry out compound.
The thickness of metal composite foils is 0.01-0.1mm, is applicable to the designing requirement of ultrathin lithium ion battery collector, and the thickness of preferable alloy composite insulating foil is 0.02-0.06mm.
Metal composite foils is hard state or 3/4 hardness 1/2 hardness or 1/4 hardness or soft state, preferably 1/2 hardness or 1/4 hardness or soft state, usually, be applied to the ultrathin lithium ion battery of smart card, should use 1/2 hard or 1/4 hard or soft state, adapt to the bending of smart card and distortion function.
Ultrathin lithium ion battery collector leads to lug, and lug is that metal composite foils directly extends out.The lug of directly extending out has had easy soldering layer, without the need to one one ground welding switching piece, significantly enhances productivity, does not have that lug converting interface is partially thick, off normal, easily broken defect.
Embodiment two: the metal composite foils having corrosion-resistant conductive layer
The ultrathin lithium ion battery collector of present embodiment, the double packaging film doing ultrathin lithium ion battery of this collector, this collector is metal composite foils, this metal composite foils at least comprises corrosion-resistant conductive layer and strengthens composite bed, strengthening composite bed is one in titanium foil or titanium alloy layer, layers of chrome, aluminium lamination or aluminium alloy layer, and corrosion-resistant conductive layer is aluminium lamination or aluminium alloy layer; Corrosion-resistant conductive layer and afflux conductive layer are combined into one; Described metal composite foils is: titanium-aluminum metal composite insulating foil, Ti-Al alloy metal composite foils, titanium alloy-aluminum metal composite insulating foil, titanium alloy-Al-alloy metal composite insulating foil, chromium-aluminum metal composite insulating foil, chromium-aluminium alloy metal composite foils, aluminium-Al-alloy metal composite insulating foil, aluminium alloy-Al-alloy metal composite insulating foil.
The anti-corrosion capability of corrosion-resistant conductive layer is that this layer corrodes with the laminating interface energy long-lasting tolerance liquid electrolyte after the laminating of hot melt cushion rubber, is not easy cracking.
The effect strengthening composite bed is the intensity increasing metal composite foils after following corrosion-resistant conductive layer compound, prevents or reduces in use procedure the generation of ftractureing, boring a hole, rupturing.When making ultrathin lithium ion battery by the metal composite foils of aluminous layer described above or aluminium alloy layer as plus plate current-collecting body, positive electrode cream is bonded in aluminium lamination or aluminium alloy aspect, aluminium lamination or aluminium alloy layer energy long-lasting tolerance liquid electrolyte corrode, can effectively prevent electrolyte from corroding the rubberizing face of collector and hot melt cushion rubber, effectively enhance seal durability, extend storage life and the useful life of ultrathin lithium ion battery; When making ultrathin lithium ion battery by the metal composite foils of aluminous layer described in epimere or aluminium alloy layer as negative current collector, negative electrode cream can be bonded in aluminium lamination or aluminium alloy aspect, and negative electrode active material should be lithium titanate; Go for the ultrathin lithium ion battery using liquid electrolyte, also go for the ultrathin lithium ion battery using gel state electrolyte or solid electrolyte.When making ultrathin lithium ion battery by the metal composite foils of aluminous layer described in epimere or aluminium alloy layer as plus plate current-collecting body, positive electrode cream can be bonded on non-aluminium lamination or non-aluminum alloy layer; When making ultrathin lithium ion battery by the metal composite foils of aluminous layer described in epimere or aluminium alloy layer as negative current collector, negative electrode cream can be bonded on non-aluminium lamination or non-aluminum alloy layer, and negative electrode active material can be material with carbon element or lithium titanate; Be applicable to the ultrathin lithium ion battery using gel state electrolyte or solid electrolyte.Problem of Cracking can be solved with the ultrathin lithium ion battery that above-mentioned four kinds of schemes make.
Equally, because metal composite foils adopts two or more metal forming or Alloy Foil to be composited, the intensity of battery afflux liquid and durability increase, can not bore a hole or tear in use procedure, there will not be local pressure break or local internal stress excessive situation during electrode compressing tablet, avoid the generation of electrochemistry spot corrosion or stress corrosion.
As a kind of improvement project, also at least compound layer of metal layer between described corrosion-resistant conductive layer and afflux conductive layer, can strengthen intensity and the durability of metal composite foils so further.
The two sides of metal composite foils is topmost, the different metal level of some layers can be added in centre, increase the metal level that the some layers of compound are different between metal composite foils two sides, respective effect is identical, can be used for the ultrathin lithium ion battery that making metal composite foils is done equally; But it is more much more complicated to add the number of plies, and cost is higher, and thickness is thicker, therefore preferably two-layer metal composite foils.
Rolling compund or composite electroplated or Vacuum Deposition compound is adopted between described metal composite foils different metal layer.When metal level has more than three layers, one or more complex method above-mentioned can be used to carry out compound; Also other can be used method of compound can to carry out compound.
The thickness of metal composite foils is 0.01-0.1mm, is applicable to the designing requirement of ultrathin lithium ion battery collector, and the thickness of preferable alloy composite insulating foil is 0.02-0.06mm.
Metal composite foils is hard state or 3/4 hardness 1/2 hardness or 1/4 hardness or soft state, preferably 1/2 hardness or 1/4 hardness or soft state, usually, be applied to the ultrathin lithium ion battery of smart card, should use 1/2 hard or 1/4 hard or soft state, adapt to the bending of smart card and distortion function.
Ultrathin lithium ion battery collector leads to lug, and lug is that metal composite foils directly extends out.
Embodiment three: both positive and negative polarity all uses the metal composite foils battery of easy soldering layer
Present embodiments provide a kind of ultrathin lithium ion battery applying collector described in embodiment one, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion, plus plate current-collecting body and negative current collector use the above-mentioned metal composite foils with easy soldering layer all separately, and positive pole cream is bonded on the afflux conductive layer of plus plate current-collecting body, negative pole cream can be bonded in any surface of negative current collector, is preferably bonded in the easy soldering layer of negative current collector.
It should be noted that, negative pole cream is bonded on the afflux conductive layer of negative current collector, afflux conductive layer be aluminium foil or alloy foil time, negative pole cream active material should be lithium titanate.
The ultrathin lithium ion battery of present embodiment, adopt metal composite foils as positive pole collective fluid and negative current collector, because metal composite foils comprises easy soldering layer and afflux conductive layer, soldering layer can ultrasonic spot welding, laser spot welding, AC spot-welding, DC spot welding or soldering, expand the mode of welding, solderability is good, is user-friendly to; When adopting soldering, need not weld switching piece, operation reduces, and qualification rate is high, and cost of labor is low; Do not have that lug converting interface is partially thick, off normal, easily broken defect.
The afflux conductive layer of metal composite foils be aluminium lamination or aluminium alloy layer time, aluminium lamination or aluminium alloy layer energy long-lasting tolerance liquid electrolyte corrode, can effectively prevent electrolyte from corroding the rubberizing face of collector and hot melt cushion rubber, effectively enhance seal durability, extend storage life and the useful life of ultrathin lithium ion battery; Go for the ultrathin lithium ion battery using liquid electrolyte, gel state electrolyte or solid electrolyte.
Equally, because metal composite foils adopts two or more metal or alloy, the intensity of positive plate and negative plate and durability increase, can not bore a hole or tear in use procedure, local pressure break or local internal stress excessive situation is there will not be during electrode compressing tablet, avoid the generation of electrochemistry spot corrosion or stress corrosion, effectively can increase the security performance of battery, increase the service life.
In order to prevent, in use procedure, external short circuit occurs, selectively can be provided with insulating protective layer in battery outer surface at least 1 face, can with pad pasting, spray paint, the method such as dipping lacquer, ink forms insulating protective layer.
In order to identify battery information, selectively word or pattern or bar code or Quick Response Code being set resultant battery appearance at least 1, above-mentioned word or pattern or bar code or Quick Response Code can being produced by methods such as spray word, bat printing, silk-screen, labeling, laser markings.
Embodiment four: the positive pole metal composite foils negative pole battery of single metal forming
Present embodiments provide for the ultrathin lithium ion battery of collector described in another kind of application embodiment one, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion, plus plate current-collecting body uses the above-mentioned metal composite foils with easy soldering layer, and positive pole cream is bonded on the afflux conductive layer of plus plate current-collecting body, negative current collector is the one in Copper Foil, copper alloy foil, nickel foil, nickel alloy foil, silver foil, silver alloy paper tinsel, iron foil, ferroalloy paper tinsel, stainless steel foil.
The ultrathin lithium ion battery of present embodiment, adopt metal composite foils as positive collective fluid, because metal composite foils comprises easy soldering layer and afflux conductive layer, easy soldering layer can ultrasonic spot welding, laser spot welding, AC spot-welding, DC spot welding or soldering, switching piece need not be welded, expanded the mode of welding, solderability is good, is user-friendly to; When adopting soldering, operation reduces, and qualification rate is high, and cost of labor is low, does not have that lug converting interface is partially thick, off normal, easily broken defect.
The afflux conductive layer of metal composite foils be aluminium lamination or aluminium alloy layer time, aluminium lamination or aluminium alloy layer energy long-lasting tolerance liquid electrolyte corrode, can effectively prevent electrolyte from corroding the rubberizing face of collector and hot melt cushion rubber, effectively enhance seal durability, extend storage life and the useful life of ultrathin lithium ion battery; Go for the ultrathin lithium ion battery using liquid electrolyte, gel state electrolyte or solid electrolyte.
Equally, because metal composite foils adopts two or more metal or alloy, the intensity of positive plate and durability increase, can not bore a hole or tear in use procedure, local pressure break or local internal stress excessive situation is there will not be during electrode compressing tablet, avoid the generation of electrochemistry spot corrosion or stress corrosion, effectively can increase the security performance of battery, increase the service life.
In order to prevent, in use procedure, external short circuit occurs, selectively can be provided with insulating protective layer in battery outer surface at least 1 face, can with pad pasting, spray paint, the method such as dipping lacquer, ink forms insulating protective layer.
In order to identify battery information, selectively word or pattern or bar code or Quick Response Code being set resultant battery appearance at least 1, above-mentioned word or pattern or bar code or Quick Response Code can being produced by methods such as spray word, bat printing, silk-screen, labeling, laser markings.
Embodiment five: the positive pole battery of single metal forming negative pole metal composite foils
Present embodiments provide for the ultrathin lithium ion battery of collector described in another kind of application embodiment one, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion, negative current collector uses the above-mentioned metal composite foils with easy soldering layer, on the easy soldering layer that negative pole cream is bonded in negative current collector or on afflux conductive layer.
It should be noted that, negative pole cream is bonded on the afflux conductive layer of negative current collector, afflux conductive layer be aluminium lamination or aluminium alloy layer time, negative pole cream active material should be lithium titanate.
The ultrathin lithium ion battery of present embodiment, adopt metal composite foils as negative collective fluid, because metal composite foils comprises easy soldering layer and afflux conductive layer, easy soldering layer can ultrasonic spot welding, laser spot welding, AC spot-welding, DC spot welding or soldering, switching piece need not be welded, expanded the mode of welding, solderability is good, is user-friendly to; When adopting soldering, operation reduces, and qualification rate is high, and cost of labor is low, does not have that lug converting interface is partially thick, off normal, easily broken defect.
The afflux conductive layer of metal composite foils be aluminium lamination or aluminium alloy layer time, aluminium lamination or aluminium alloy layer energy long-lasting tolerance liquid electrolyte corrode, can effectively prevent electrolyte from corroding the rubberizing face of collector and hot melt cushion rubber, effectively enhance seal durability, extend storage life and the useful life of ultrathin lithium ion battery; Go for the ultrathin lithium ion battery using liquid electrolyte, gel state electrolyte or solid electrolyte.
Equally, because metal composite foils adopts two or more metal or alloy, the intensity of negative plate and durability increase, can not bore a hole or tear in use procedure, local pressure break or local internal stress excessive situation is there will not be during electrode compressing tablet, avoid the generation of electrochemistry spot corrosion or stress corrosion, effectively can increase the security performance of battery, increase the service life.
In order to prevent, in use procedure, external short circuit occurs, selectively can be provided with insulating protective layer in battery outer surface at least 1 face, can with pad pasting, spray paint, the method such as dipping lacquer, ink forms insulating protective layer.
In order to identify battery information, selectively word or pattern or bar code or Quick Response Code being set resultant battery appearance at least 1, above-mentioned word or pattern or bar code or Quick Response Code can being produced by methods such as spray word, bat printing, silk-screen, labeling, laser markings.
Embodiment six: both positive and negative polarity all uses the metal composite foils battery of corrosion-resistant conductive layer
Present embodiments provide for a kind of ultrathin lithium ion battery applying collector described in embodiment two, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion, plus plate current-collecting body and negative current collector use the above-mentioned metal composite foils with corrosion-resistant conductive layer all separately, and on the corrosion-resistant conductive layer that positive pole cream is bonded in plus plate current-collecting body or strengthen on composite bed, on the enhancing composite bed that negative pole cream is bonded in negative current collector or on corrosion-resistant conductive layer.
It should be noted that, negative pole cream adhesive surface be aluminium lamination or aluminium alloy layer time, negative pole cream active material should be lithium titanate.
The ultrathin lithium ion battery of present embodiment, time on the corrosion-resistant conductive layer that positive pole cream is bonded on the corrosion-resistant conductive layer of plus plate current-collecting body, negative pole cream is bonded in negative current collector, utilize the characteristic that aluminium foil or alloy foil energy long-lasting tolerance liquid electrolyte corrode, solve titanium foil, titanium alloy foil and lead foil rubberizing interface can not corrode by long-lasting tolerance liquid electrolyte, and cause the problem of easily cracking; Effectively can prevent electrolyte from corroding the rubberizing face of collector and hot melt cushion rubber, effectively enhance seal durability, extend storage life and the useful life of ultrathin lithium ion battery; Go for the ultrathin lithium ion battery using liquid electrolyte, gel state electrolyte or solid electrolyte; When positive pole cream or negative pole cream are bonded in non-aluminium lamination or non-aluminium alloy layer, be only applicable to the ultrathin lithium ion battery using gel state electrolyte or solid electrolyte.
Equally, due to the two or more metal or alloy of metal composite foils, the intensity of positive plate and negative plate and durability increase, can not bore a hole or tear in use procedure, local pressure break or local internal stress excessive situation is there will not be during electrode compressing tablet, avoid the generation of electrochemistry spot corrosion or stress corrosion, effectively can increase the security performance of battery, increase the service life.
In order to prevent, in use procedure, external short circuit occurs, selectively can be provided with insulating protective layer in battery outer surface at least 1 face, can with pad pasting, spray paint, the method such as dipping lacquer, ink forms insulating protective layer.
In order to identify battery information, selectively word or pattern or bar code or Quick Response Code being set resultant battery appearance at least 1, above-mentioned word or pattern or bar code or Quick Response Code can being produced by methods such as spray word, bat printing, silk-screen, labeling, laser markings.
Embodiment seven: the positive pole battery of metal composite foils negative pole by single metal forming having corrosion-resistant conductive layer
Present embodiments provide for the ultrathin lithium ion battery of collector described in another kind of application embodiment two, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion, plus plate current-collecting body uses the above-mentioned metal composite foils with corrosion-resistant conductive layer, positive pole cream is bonded on the corrosion-resistant conductive layer of plus plate current-collecting body, and negative current collector is the one in Copper Foil, copper alloy foil, nickel foil, nickel alloy foil, silver foil, silver alloy paper tinsel, iron foil, ferroalloy paper tinsel, stainless steel foil.
Above-mentioned two kinds of ultrathin lithium ion batteries, the metal composite foils that employing titanium layer, titanium alloy layer or layers of chrome and aluminum or aluminum alloy layer are formed is as plus plate current-collecting body and negative current collector, or as plus plate current-collecting body, and negative current collector is the one in Copper Foil, copper alloy foil, nickel foil, nickel alloy foil, silver foil, silver alloy paper tinsel, iron foil, ferroalloy paper tinsel, stainless steel foil; Or, employing aluminium-Al-alloy metal composite insulating foil, aluminium alloy-Al-alloy metal composite insulating foil replace above-mentioned metal composite foils, utilize the characteristic that aluminium foil or alloy foil energy long-lasting tolerance liquid electrolyte corrode, solve titanium foil, titanium alloy foil and lead foil rubberizing interface can not corrode by long-lasting tolerance liquid electrolyte, and cause the problem of easily cracking; Effectively can prevent electrolyte from corroding the rubberizing face of collector and hot melt cushion rubber, effectively enhance seal durability, extend storage life and the useful life of ultrathin lithium ion battery; Go for the ultrathin lithium ion battery using liquid electrolyte, gel state electrolyte or solid electrolyte.
Equally, due to the two or more metal or alloy of metal composite foils, the intensity of positive plate and durability increase, can not bore a hole or tear in use procedure, local pressure break or local internal stress excessive situation is there will not be during electrode compressing tablet, the generation avoiding electrochemistry spot corrosion or stress corrosion is same, effectively can increase the security performance of battery, increase the service life.
In order to prevent, in use procedure, external short circuit occurs, selectively can be provided with insulating protective layer in battery outer surface at least 1 face, can with pad pasting, spray paint, the method such as dipping lacquer, ink forms insulating protective layer.
In order to identify battery information, selectively word or pattern or bar code or Quick Response Code being set resultant battery appearance at least 1, above-mentioned word or pattern or bar code or Quick Response Code can being produced by methods such as spray word, bat printing, silk-screen, labeling, laser markings.
Embodiment eight: positive pole is with having the metal composite foils negative pole of corrosion-resistant conductive layer with having the battery of the metal composite foils of easy soldering layer or positive pole with there being the metal composite foils negative pole of the easy soldering layer battery of metal composite foils having corrosion-resistant conductive layer
Present embodiment provides a kind of ultrathin lithium ion battery manufacture method, and its plus plate current-collecting body, or/and negative current collector uses one of above-mentioned embodiment one or embodiment two or both metal composite foils, doublely does packaging film.
Advantage below in conjunction with the battery of comparative example application ultrathin lithium ion battery collector of the present invention:
In Fig. 1 and Fig. 2,01 is plus plate current-collecting body, and 0101 is metal composite foils extexine, and 0102 is metal composite foils endosexine, and 02 is positive pole cream, and 03 is positive pole ear, and 04 is negative current collector, and 05 is negative pole cream, and 06 is negative lug, and 07 is hot melt cushion rubber, and 08 is barrier film.
Comparative example: prior art exists Welding Problems and problem of Cracking
Use TA1 type titanium foil does plus plate current-collecting body, TA1 type titanium foil does negative current collector, collector is double does packaging film, and lithium does positive pole, graphite does negative pole, microporous polypropylene membrane makees barrier film, liquid electrolyte in cobalt acid, specific practice:
2gPVDF is added in 60gNMP solvent and stir melt into glue, 95g cobalt acid lithium and 3g conductive carbon black are added in glue, high-speed stirring mixes anode sizing agent, plus plate current-collecting body is double does packaging film to adopt 30 μm of thick TA1 type titanium foils to do, anode sizing agent is sprayed on the centre position of plus plate current-collecting body one side, control coated face density 280g/m2, be coated with cream area 17mm*17mm, punch out positive plate, positive plate main body is the square of 25mm*25mm, the anode ear of 3mm*3mm is reserved in side, positive pole cream is placed in the middle, positive pole cream periphery 4mm collector is left a blank and is done adhesive seal limit, positive plate is dried, roll-in makes thick 130 μm of pole piece, the periphery that clean plus plate current-collecting body is reserved out, 100 μm of thick PURs are punched out hot melt cushion rubber: external diameter is the square endoporus of length of side 25mm is the square of length of side 19mm, the periphery that size is reserved out with plus plate current-collecting body is corresponding, by the periphery that hot melt cushion rubber hot melt adhesive is reserved out at plus plate current-collecting body, the positive plate of obtained band hot melt cushion rubber.
2gCMC adhesive is added in 120g water and stirs melt into glue, add the SBR of 4g content 50%, stir evenly into mixing glue, 94g graphite and 2g conductive carbon black are added in glue, high-speed stirring mixes cathode size, negative current collector is double does packaging film to adopt 30 μm of thick TA1 type titanium foils to do, by cathode size even application on the centre position of negative current collector one side, control coated face density 125g/m2, be coated with cream area 18mm*18mm, punch out negative plate, negative plate main body is the square of 25mm*25mm, the negative electrode lug of 3mm*3mm is reserved in side, negative pole cream is placed in the middle, negative pole cream periphery 3.5mm collector is left a blank and is done adhesive seal limit, negative plate is dried, roll-in makes thick 120 μm of pole piece, the periphery that clean negative current collector is reserved out, 100 μm of thick PURs are punched out hot melt cushion rubber: the outer square endoporus for length of side 25mm is the square of length of side 19mm, the periphery that size is reserved out with negative current collector is corresponding, by the periphery that hot melt cushion rubber hot melt adhesive is reserved out at negative current collector, the negative plate of obtained band hot melt cushion rubber.
Barrier film uses 20 μm of thick polypropylene (PP) microporous barriers, and barrier film is cut into 20mm*20mm.
Use ZL201420055873.8 non-closed sealing machine of ultrathin lithium ion battery, the negative plate of the positive plate of band hot melt cushion rubber, barrier film and band hot melt cushion rubber is carried out non-closed sealing, obtains battery big.
By big for battery in vacuum drying chamber 80 DEG C of-0.1MPa dry 8h, add 0.06g liquid electrolyte in big toward battery in glove box, use vacuum heat-seal machine, closes big for battery untight banding under vacuum conditions.
Use the formation cabinet of 5V10mA range, 2mA constant current charge turns constant voltage charge to 4.2V to be ended to 0.2mA; 2mA constant-current discharge, to 3V, circulates 2 times, then 2mA constant current charge turns constant voltage charge to 4.2V and ends to 0.2mA.Measure discharge capacity of the cell, voltage and internal resistance, obtain finished product.
Embodiment 1: the wherein a kind of metal composite foils using embodiment one
Plus plate current-collecting body in comparative example is changed into 45 μm of thick half-hard state aluminium-nickel composite insulating foils, the double packaging film doing ultrathin lithium ion battery of this collector.
Embodiment 2: the wherein a kind of metal composite foils using embodiment two
Plus plate current-collecting body in comparative example is changed into 45 μm of thick half-hard state aluminium-titanium composite insulating foils, the double packaging film doing ultrathin lithium ion battery of this collector.
Embodiment 3: wherein one or both metal composite foils collocation using embodiment three
Plus plate current-collecting body in comparative example is changed into 45 μm of thick half-hard state aluminium-nickel composite insulating foils, negative current collector changes 45 μm of thick half-hard state aluminium-nickel composite insulating foils into.Positive pole cream is coated in the aluminium face of aluminium-nickel composite insulating foil, and negative pole cream is coated in the nickel face of aluminium-nickel composite insulating foil, makes the ultrathin lithium ion battery done by metal composite foils.
Embodiment 4: use wherein a kind of metal composite foils of embodiment four and single metal forming to arrange in pairs or groups
Plus plate current-collecting body in comparative example is changed into 45 μm of thick half-hard state aluminium-nickel composite insulating foils, negative current collector changes 30 μm of thick soft state nickel foils into.Positive pole cream is coated in the aluminium face of aluminium-nickel composite insulating foil, and negative pole cream is coated in any surface of nickel foil, makes the ultrathin lithium ion battery done by metal composite foils.
Embodiment 5: use wherein a kind of metal composite foils of embodiment five and single metal forming to arrange in pairs or groups
Still change plus plate current-collecting body in comparative example into 45 μm of half-hard state aluminium-nickel composite insulating foils with titanium foil, negative current collector, polypropylene micropore diaphragm and liquid electrolyte change solid electrolyte membrane and solid electrolyte into.Positive pole cream is coated in any surface of titanium foil, and negative pole cream is coated in the nickel face of aluminium-nickel composite insulating foil, makes the ultrathin lithium ion battery done by metal composite foils.
Embodiment 6: wherein one or both metal composite foils collocation using embodiment six
Plus plate current-collecting body in comparative example is changed into 45 μm of half-hard state aluminium-titanium composite insulating foils, negative current collector changes 45 μm of half-hard state aluminium-titanium composite insulating foils into, negative electrode active material changes lithium titanate into.Positive pole cream is coated in the aluminium face of aluminium-titanium composite insulating foil, and negative pole cream is coated in the aluminium face of aluminium-titanium composite insulating foil; Change into according to lithium titanate battery process system; Make the ultrathin lithium ion battery done by metal composite foils.
Embodiment 7: use wherein a kind of metal composite foils of embodiment seven and single metal forming to arrange in pairs or groups
Plus plate current-collecting body in comparative example is changed into 45 μm of half-hard state aluminium-titanium composite insulating foils, negative current collector changes 30 μm of soft state nickel foils into.Positive pole cream is coated in the aluminium face of aluminium-titanium composite insulating foil, and negative pole cream is coated in any surface of nickel foil, makes the ultrathin lithium ion battery done by metal composite foils.
Embodiment 8: the wherein two kinds of metal composite foils collocation using embodiment eight
Plus plate current-collecting body in comparative example is changed into 45 μm of thick half-hard state aluminium-nickel composite insulating foils, negative current collector changes 45 μm of half-hard state aluminium-titanium composite insulating foils into, positive pole cream is coated in the aluminium face of aluminium-nickel composite insulating foil, negative pole cream is coated in any surface of nickel foil, makes the ultrathin lithium ion battery done by metal composite foils.
Comparative example and embodiment 3-embodiment 8 respectively get 100 qualified samples, test its properties (the another sampling and testing of cycle life) and average, be listed in the table below; Cycle life respectively gets 10 qualified samples to do circulation and average.
Comparative example and embodiment battery structure and performance comparison table
From above-mentioned comparative analysis, ultrathin lithium ion battery provided by the invention compares existing ultrathin lithium ion battery, and useful life significantly promotes; Cracking situation is 0, and cell durability significantly promotes.Wherein, the plus plate current-collecting body of the ultrathin lithium ion battery of embodiment 3 and 4 uses the metal composite foils comprising easy soldering layer, negative current collector uses the single metal forming of metal composite foils name or the easily soldering comprising easy soldering layer, be applicable to the various welding manners commonly used, illustrate that the metal composite foils comprising easy soldering layer can make the weldability of plus plate current-collecting body better; The negative pole collective fluid of the ultrathin lithium ion battery of embodiment 5 is applicable to the various welding manners commonly used, and illustrates that the metal composite foils comprising easy soldering layer can make the weldability of negative current collector better; Plus plate current-collecting body and the negative current collector of the ultrathin lithium ion battery of embodiment 6 and 8 all use the metal composite foils comprising corrosion-resistant conductive layer, applicable liquid electrolyte, solid electrolyte or gel state electrolyte, illustrate that battery is wider to electrolytical applicability, improve the space of the design of battery; The plus plate current-collecting body of the ultrathin lithium ion battery of embodiment 7 uses the metal composite foils comprising corrosion-resistant conductive layer, negative current collector adopts the single metal forming of easy soldering, applicable liquid electrolyte, solid electrolyte or gel state electrolyte, illustrate and adopt the metal composite foils of corrosion-resistant conductive layer that battery can be made wider to electrolytical applicability, improve the space of the design of battery.
The present invention's selecting by metal composite foils, can solve Welding Problems and problem of Cracking simultaneously, or solves Welding Problems, or coordinates solution problem of Cracking by electrolyte, makes the design of ultrathin lithium ion battery, produces and can carry out smoothly.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change above-mentioned execution mode and revise.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the present invention.

Claims (17)

1. ultrathin lithium ion battery collector, the double packaging film doing ultrathin lithium ion battery of this collector, it is characterized in that: this collector is metal composite foils, this metal composite foils at least comprises the easy soldering layer and afflux conductive layer that easy soldering material makes, and afflux conductive layer is the one in aluminium lamination, aluminium alloy layer, titanium layer, titanium alloy layer or layers of chrome; Easy soldering layer and afflux conductive layer are combined into one.
2. ultrathin lithium ion battery collector according to claim 1, is characterized in that: described easy soldering layer is a kind of in nickel dam, nickel alloy layer, layers of copper, copper alloy layer, silver layer, ag alloy layer, iron layer, iron alloy layer or stainless steel layer.
3. ultrathin lithium ion battery collector according to claim 1, is characterized in that: also at least compound layer of metal layer between described easy soldering layer and afflux conductive layer.
4. ultrathin lithium ion battery collector according to claim 1, is characterized in that: adopt Rolling compund or composite electroplated or Vacuum Deposition compound between described metal composite foils different metal layer.
5. ultrathin lithium ion battery collector, the double packaging film doing ultrathin lithium ion battery of this collector, it is characterized in that: this collector is metal composite foils, this metal composite foils at least comprises corrosion-resistant conductive layer and strengthens composite bed, enhancing composite bed is the one in titanium layer, titanium alloy layer, layers of chrome, aluminium lamination or aluminium alloy layer, and corrosion-resistant conductive layer is aluminium lamination or aluminium alloy layer; Corrosion-resistant conductive layer and enhancing composite bed are combined into one.
6. ultrathin lithium ion battery collector according to claim 5, is characterized in that: described corrosion-resistant conductive layer and to strengthen between composite bed also at least compound layer of metal layer.
7. ultrathin lithium ion battery collector according to claim 5, is characterized in that: adopt Rolling compund or composite electroplated or Vacuum Deposition compound between described metal composite foils different metal layer.
8. the ultrathin lithium ion battery collector according to any one of claim 1 to 7, is characterized in that: the thickness of described metal composite foils is 0.01-0.1mm.
9. the ultrathin lithium ion battery collector according to any one of claim 1 to 7, is characterized in that: described metal composite foils is hard state or 3/4 hardness 1/2 hardness or 1/4 hardness or soft state.
10. the ultrathin lithium ion battery collector according to any one of claim 1 to 9, is characterized in that: ultrathin lithium ion battery collector leads to lug, and lug directly extends out metal composite foils.
11. ultrathin lithium ion batteries, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, and hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion; It is characterized in that: plus plate current-collecting body and negative current collector use the metal composite foils described in any one of claim 1 to 4 all separately, and positive pole cream is bonded on the afflux conductive layer of plus plate current-collecting body.
12. ultrathin lithium ion batteries, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, and hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion; It is characterized in that: plus plate current-collecting body uses the metal composite foils described in any one of claim 1 to 4, and positive pole cream is bonded on the afflux conductive layer of plus plate current-collecting body, negative current collector is the one in Copper Foil, copper alloy foil, nickel foil, nickel alloy foil, silver foil, silver alloy paper tinsel, iron foil, ferroalloy paper tinsel, stainless steel foil.
13. ultrathin lithium ion batteries, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, and hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion; It is characterized in that: negative current collector uses the metal composite foils described in any one of claim 1 to 4, on the easy soldering layer that negative pole cream is bonded in negative current collector or on afflux conductive layer.
14. ultrathin lithium ion batteries, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, and hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion; It is characterized in that: plus plate current-collecting body and negative current collector use the metal composite foils described in any one of claim 5 to 7 all separately; And on the corrosion-resistant conductive layer that positive pole cream is bonded in plus plate current-collecting body or strengthen on composite bed, on the enhancing composite bed that negative pole cream is bonded in negative current collector or on corrosion-resistant conductive layer.
15. ultrathin lithium ion batteries, comprise positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, positive plate and negative plate separate by barrier film, barrier film and fill electrolyte between positive plate and negative plate, positive plate comprises plus plate current-collecting body and positive pole cream, positive pole cream is bonded on plus plate current-collecting body, negative plate comprises negative current collector and negative pole cream, negative pole cream is bonded on negative current collector, collector is double does packaging film, and hot melt cushion rubber is by plus plate current-collecting body edge and the encapsulation of negative current collector edge fusion; It is characterized in that: plus plate current-collecting body uses the metal composite foils described in any one of claim 5 to 7, and negative current collector is the one in Copper Foil, copper alloy foil, nickel foil, nickel alloy foil, silver foil, silver alloy paper tinsel, iron foil, ferroalloy paper tinsel, stainless steel foil; Positive pole cream is bonded on the corrosion-resistant conductive layer of plus plate current-collecting body.
16., according to claim 11 to the ultrathin lithium ion battery described in 15 any one, is characterized in that: battery outer surface at least 1 face is provided with insulating protective layer.
17. ultrathin lithium ion battery manufacture methods, is characterized in that: plus plate current-collecting body, or/and negative current collector uses the metal composite foils described in any one of claim 1 to 10, doublely does packaging film.
CN201511008931.7A 2015-12-27 2015-12-27 Ultrathin lithium ion battery current collector, ultrathin lithium ion battery and preparation method Withdrawn CN105428660A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106935794A (en) * 2017-03-15 2017-07-07 陈熙野 A kind of preparation method of copper electrode of gilding
CN110050370A (en) * 2016-10-14 2019-07-23 东洋钢钣株式会社 Battery current collector and battery
CN110364678A (en) * 2018-04-10 2019-10-22 通用汽车环球科技运作有限责任公司 The method for manufacturing lithium an- ode
CN110380107A (en) * 2019-08-21 2019-10-25 连云港德立信电子科技有限公司 Ultra-thin lithium cell
CN111864277A (en) * 2020-08-20 2020-10-30 苏州合睿新能源科技有限公司 Method for manufacturing lithium ion battery capable of resisting storage discharge to zero volt
CN113022048A (en) * 2019-12-24 2021-06-25 广州方邦电子股份有限公司 Composite metal foil, flexible foil-clad plate and preparation method of flexible foil-clad plate
CN113488733A (en) * 2021-06-09 2021-10-08 欣铼能源科技(深圳)有限公司 Energy storage module and application thereof, electric device and application of matrix thereof
CN113785424A (en) * 2020-02-05 2021-12-10 优百特有限公司 Thin lithium battery and method for manufacturing the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001250560A (en) * 2000-03-08 2001-09-14 Enax Inc Lithium ion secondary cell
CN202503073U (en) * 2012-02-09 2012-10-24 广州丰江电池新技术股份有限公司 Ultrathin lithium ion battery
CN103384012A (en) * 2013-06-26 2013-11-06 东莞新能源科技有限公司 Current collector structure of positive electrode of lithium ion battery and battery including structure
CN104701388A (en) * 2015-03-15 2015-06-10 普乐新能源（蚌埠）有限公司 High reliability core board for back contact solar module and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001250560A (en) * 2000-03-08 2001-09-14 Enax Inc Lithium ion secondary cell
CN202503073U (en) * 2012-02-09 2012-10-24 广州丰江电池新技术股份有限公司 Ultrathin lithium ion battery
CN103384012A (en) * 2013-06-26 2013-11-06 东莞新能源科技有限公司 Current collector structure of positive electrode of lithium ion battery and battery including structure
CN104701388A (en) * 2015-03-15 2015-06-10 普乐新能源（蚌埠）有限公司 High reliability core board for back contact solar module and preparation method thereof

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110050370A (en) * 2016-10-14 2019-07-23 东洋钢钣株式会社 Battery current collector and battery
CN106935794A (en) * 2017-03-15 2017-07-07 陈熙野 A kind of preparation method of copper electrode of gilding
CN106935794B (en) * 2017-03-15 2019-08-06 陈熙野 A kind of preparation method for copper electrode of gilding
CN110364678A (en) * 2018-04-10 2019-10-22 通用汽车环球科技运作有限责任公司 The method for manufacturing lithium an- ode
CN110364678B (en) * 2018-04-10 2022-08-12 通用汽车环球科技运作有限责任公司 Method for manufacturing lithium metal negative electrode
CN110380107A (en) * 2019-08-21 2019-10-25 连云港德立信电子科技有限公司 Ultra-thin lithium cell
WO2021031494A1 (en) * 2019-08-21 2021-02-25 连云港德立信电子科技有限公司 Ultrathin lithium battery
CN113022048A (en) * 2019-12-24 2021-06-25 广州方邦电子股份有限公司 Composite metal foil, flexible foil-clad plate and preparation method of flexible foil-clad plate
CN113785424A (en) * 2020-02-05 2021-12-10 优百特有限公司 Thin lithium battery and method for manufacturing the same
CN111864277A (en) * 2020-08-20 2020-10-30 苏州合睿新能源科技有限公司 Method for manufacturing lithium ion battery capable of resisting storage discharge to zero volt
CN113488733A (en) * 2021-06-09 2021-10-08 欣铼能源科技(深圳)有限公司 Energy storage module and application thereof, electric device and application of matrix thereof

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