CN205429091U - Mixed negative pole pole piece lithium ion power batteries of electric capacity type - Google Patents

Mixed negative pole pole piece lithium ion power batteries of electric capacity type Download PDF

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CN205429091U
CN205429091U CN201520972639.6U CN201520972639U CN205429091U CN 205429091 U CN205429091 U CN 205429091U CN 201520972639 U CN201520972639 U CN 201520972639U CN 205429091 U CN205429091 U CN 205429091U
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layer
negative
pole piece
negative pole
lithium
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李朝
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

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Abstract

The utility model discloses a mixed negative pole pole piece lithium ion power batteries of electric capacity type, including the negative pole piece, positive plate and diaphragm, the negative pole piece, the positive plate was convoluteed or cross layer design with mutual separating of diaphragm, the diaphragm sets up between negative pole piece and positive plate, the negative pole piece is for mixing the negative pole pole piece, it is the three -layer composite structure to mix the negative pole pole piece, the negative pole pole piece includes first negative pole layer, second negative pole layer and negative current collector layer, female side and sunny side that first negative pole layer and second negative pole layer coated respectively at negative current collector, first negative pole layer is lithium titanate negative electrode material layer, second negative pole layer is natural graphite, artificial graphite, the graphite negative electrode material layer that soft carbon and hard carbon mixed system are constituteed, soft carbon, hard carbon's quality accounts for the 50 -95% of mixed system, the positive pole material layer of positive pole material layer for including the mass fraction 5 -50% active carbon. The utility model discloses a mixed negative pole pole piece lithium ion power batteries of electric capacity type has the comprehensive properties excellence, processing maneuverability is strong and low cost's characteristics.

Description

A kind of capacitor type mixing cathode pole piece lithium-ion-power cell
Technical field
This utility model relates to cell art, is specially a kind of capacitor type mixing cathode pole piece lithium-ion-power cell.
Background technology
Along with the information-based and intelligentized high speed development of modern society, and environmental pollution and energy shortage are day by day serious, and society is more and more higher to capacity and the demanded power output of electrical storage device, and lithium ion battery and capacitor etc. become current research focus.Lithium ion battery has the advantages such as energy density is high, self-discharge rate is low, but high rate performance is undesirable, power density is relatively low, and the voltage range of lithium ion battery is between 3.0~4.1V, during higher than 4.1V, cell positive material and electrolyte are unstable, oxidizable, and negative terminal surface is easily analysed lithium and formed Li dendrite, brings potential safety hazard.Although capacitor has the advantages such as power density is high, have extended cycle life, but energy density is relatively low, and self-discharge rate is bigger.
In order to meet the demand of high-energy-density, high output characteristic, in recent years, electrical storage device that the electric power storage principle of lithium ion battery and capacitor combined, that be referred to as hybrid capacitor is noticeable.But, at present the combination of lithium ion battery Yu capacitor is confined to more lithium ion battery and the combination of activated carbon double-layer electrolytic capacitor, typically absorbent charcoal material is joined in the active material of lithium ion battery, as Chinese patent application CN103021671A proposes a kind of capacitor of lithium ion battery, through adding activated carbon in positive electrode active materials and adding soft carbon or hard carbon formation electric double layer activated carbon capacitor in negative active core-shell material, make its capacitor of lithium ion battery prepared have lithium ion battery high-energy-density and the feature of capacitor height highway simultaneously, widen its temperature range used and voltage range, there is excellent electricity (electric charge) conservation rate.But, in its technical scheme, activated carbon accounts for the 5.0%~50.0% of positive electrode active materials volume percent, and the A class material such as soft carbon or hard carbon accounts for the 50.0~95.0% of negative active core-shell material volume percent, seriously reduces the energy density of lithium ion battery;And, the A class materials such as the softest carbon or hard carbon are added negative material, activated carbon adds in positive electrode, i.e. need to add in the slurry process of positive pole and negative pole in the course of processing, not only difficulty of processing is unfavorable for more greatly the lifting of production efficiency, and cause many uncertain factors to both positive and negative polarity pulping process, product quality depends critically upon the uniformity of slurry, and quality risk is too high.
Utility model content
The purpose of this utility model is to provide a kind of capacitor type mixing cathode pole piece lithium-ion-power cell, take into full account that graphite cathode capacity is big, intercalation potential supports, feature with low cost and lithium titanate anode has extended cycle life, high rate performance is good, the excellent feature good with compatibility of electrolyte of security performance, there is excellent combination property, process feature workable and with low cost.
This utility model can be achieved through the following technical solutions:
nullThe utility model discloses a kind of capacitor type mixing cathode pole piece lithium-ion-power cell,Including negative plate、Positive plate and barrier film,Described negative plate、Positive plate and the spaced winding of barrier film or stack design,Described barrier film is arranged between negative plate and positive plate,Described negative plate is mixing cathode pole piece,Described mixing cathode pole piece is three-layer composite structure,Described cathode pole piece includes the first negative electrode layer、Second negative electrode layer and negative current collector layer,Described first negative electrode layer and the second negative electrode layer are respectively coated on the back and the sunny side of negative current collector layer,Described first negative electrode layer is lithium titanate anode material layer,Described second negative electrode layer is native graphite、Delanium、Soft carbon and the graphite cathode material layer of hard carbon mixed system composition,Described soft carbon、The quality of hard carbon accounts for the 50-95% of mixed system,Described positive electrode material layer is the lithium iron phosphate positive material layer including mass fraction 5-50% activated carbon、Manganate cathode material for lithium layer、Lithium cobaltate cathode material layer or nickel-cobalt-manganternary ternary anode material layer.
Further, described first negative electrode layer and the second negative electrode layer misplace in winding or stacking and are separated by, it is achieved thereby that lithium-ion-power cell concordance of structure when winding or stacking, it is ensured that the concordance of battery performance.
Further, the spaced winding of described negative plate, positive plate and barrier film forms cylindrical-shaped structure, meets the production requirement of cylindrical steel housing battery, particularly capacity type cylindrical battery and produces the needs of design.
Further, described negative plate, positive plate and barrier film spaced stratification square structure, meet the production requirement of square soft-package battery, particularly power-type lithium-ion-power cell and produce the needs of design.
Further, described negative current collector layer is Copper Foil, and Copper Foil is as conventional negative current collector, and processing technique is ripe, it is simple to the debugging of negative material coating and processing.
Further, described barrier film is PE barrier film, PP barrier film or PE/PP composite diaphragm, can select unlike material and the barrier film of thickness according to actual battery types.
Further, described positive plate is three-layer composite structure, and described positive plate includes plus plate current-collecting body layer and is coated in the positive electrode material layer of plus plate current-collecting body layer.The structure of positive plate is conventional structure, can directly utilize existing technique and produce, it is provided that the versatility of production, reduces fabrication design cost.
Further, described capacitor type mixing cathode pole piece lithium-ion-power cell also includes lithium-ion battery electrolytes, described lithium-ion battery electrolytes is made up of solvent, electrolytic salt and additive, wherein solvent is grouped into by dimethyl carbonate (DMC), diethyl carbonate (DEC), Ethyl methyl carbonate (EMC), ethylene carbonate (EC) four-tuple, its volume basis is as follows: DMC accounts for 20%~30%, DEC accounts for 20%~30%, and EMC accounts for 10%~20%, and EC accounts for 25%~50%.Lithium-ion battery electrolytes system is, with the electrolyte system of activated carbon ultracapacitor, the organic solvent system that character is real, had both met the requirement of lithium ion battery, and had met again the job demand of activated carbon ultracapacitor, and had been effectively simplified processing and manufacturing process.
Further, described additive is made up of film for additive, anti-overcharge additive and high temperature additive, wherein, O.5~3.0% film for additive has vinylethylene carbonate (VEC), vinylene carbonate (VC), and concentration is, anti-overcharge additive has cyclobenzene (CHB), biphenyl, dimethylbenzene, O.5~3.0% concentration is, O.5~3.0% high temperature additive has PS (AS), phthalic anhydride (PA), and its concentration is.
This utility model one capacitor type mixing cathode pole piece lithium-ion-power cell, has a following beneficial effect:
First, excellent combination property, play graphite cathode and the such as LiFePO4 in positive pole simultaneously, nickel-cobalt-manganese ternary material, cobalt acid lithium, LiMn2O4s etc. form lithium ion battery and play Delanium, the capacity of native graphite is big, intercalation potential supports, feature with low cost and lithium titanate anode and such as LiFePO4, nickel-cobalt-manganese ternary material, cobalt acid lithium, what the formation lithium ion battery performance lithium titanate anode such as LiMn2O4 had has extended cycle life, high rate performance is good, security performance is excellent, the feature good with compatibility of electrolyte, also by the soft carbon in graphite cathode, hard carbon forms ultracapacitor with the activated carbon in positive pole, give full play to ultracapacitor power density high, the feature having extended cycle life, it is obviously improved the combination property of whole lithium-ion-power cell;
Second, process workable, the separately stirring of graphite cathode and lithium titanate anode and coating, it is respectively coated on the back and the sunny side of negative current collector layer, the most directly mix the uncertainty of materials processing, in addition such as Delanium in graphite cathode, native graphite, soft carbon and hard carbon are graphite body cording preferable compatibility, effectively utilize technique and the equipment of existing negative pole, the most final negative plate prepared only one, simplify stacking and the structure of winding, directly utilize existing stacking or winding apparatus can be processed, and the course of processing without special frock or operates requirement with conventional process;
3rd, with low cost, on the basis of fully promoting lithium-ion-power cell performance, effectively play the advantage that graphite cathode material is with low cost, and the course of processing and existing process operation process highly versatile, effectively save the cost of processing and manufacturing.
Accompanying drawing explanation
Accompanying drawing 1 is this utility model one capacitor type mixing cathode pole piece lithium-ion-power cell mixing cathode pole piece structural representation;
Accompanying drawing 2 is this utility model one capacitor type mixing cathode pole piece lithium-ion-power cell square layered laminate structural representation;
Accompanying drawing 3 is this utility model one capacitor type mixing cathode pole piece lithium-ion-power cell cylindric winding-structure schematic diagram;
Accompanying drawing 4 is this utility model one capacitor type mixing cathode pole piece positive electrode piece of lithium-ion power battery structural representation;
In accompanying drawing, labelling includes: 1, negative plate, 2, positive plate, 3, barrier film, 4, box hat, 5, insulating trip, 6, block, 7, positive electrode material layer, 8, aluminum plastic film, and the 9, first negative electrode layer, 10, negative current collector layer, the 11, second negative electrode layer, 12, plus plate current-collecting body layer.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the technical solution of the utility model, below in conjunction with embodiment and accompanying drawing, this utility model product is described in further detail.
Embodiment 1
nullAs shown in Figure 1,The utility model discloses a kind of capacitor type mixing cathode pole piece lithium-ion-power cell,Including negative plate 1、Positive plate 2 and barrier film 3,Described negative plate 1、Positive plate 2 and the spaced winding of barrier film 3 or stack design,Described barrier film 3 is arranged between negative plate 1 and positive plate 2,Described negative plate 1 is mixing cathode pole piece,Described mixing cathode pole piece is three-layer composite structure,Described cathode pole piece includes the first negative electrode layer 9、Second negative electrode layer 11 and negative current collector layer 10,Described first negative electrode layer 9 and the second negative electrode layer 11 are respectively coated on the back and the sunny side of negative current collector layer 10,Described first negative electrode layer 9 is lithium titanate anode material layer,Described second negative electrode layer 11 is native graphite、Delanium、Soft carbon and the graphite cathode material layer of hard carbon mixed system composition,Described soft carbon、The quality of hard carbon accounts for the 50-95% of mixed system,Described graphite cathode material includes Delanium and/or native graphite.Described first negative electrode layer 9 and the second negative electrode layer 11 misplace in winding or stacking and are separated by.Described negative current collector layer 10 is Copper Foil.Described barrier film 3 is PE barrier film, PP barrier film or PE/PP composite diaphragm.Described positive electrode material layer 7 is to include the lithium iron phosphate positive material layer of mass fraction 5-50% activated carbon, manganate cathode material for lithium layer, lithium cobaltate cathode material layer or nickel-cobalt-manganternary ternary anode material layer.Described capacitor type mixing cathode pole piece lithium-ion-power cell also includes lithium-ion battery electrolytes, described lithium-ion battery electrolytes is made up of solvent, electrolytic salt and additive, wherein solvent is grouped into by dimethyl carbonate (DMC), diethyl carbonate (DEC), Ethyl methyl carbonate (EMC), ethylene carbonate (EC) four-tuple, its volume basis is as follows: DMC accounts for 20%~30%, DEC accounts for 20%~30%, EMC accounts for 10%~20%, and EC accounts for 25%~50%.Described additive is made up of film for additive, anti-overcharge additive and high temperature additive, wherein, film for additive has vinylethylene carbonate (VEC), vinylene carbonate (VC), O.5~3.0% concentration is, O.5~3.0% anti-overcharge additive has cyclobenzene (CHB), biphenyl, dimethylbenzene, and concentration is, high temperature additive has 1, O.5~3.0% 3-propane sultone (AS), phthalic anhydride (PA), its concentration is.
Embodiment 2
As in figure 2 it is shown, described negative plate 1, positive plate 2 and barrier film 3 spaced stratification square structure.Capacitor type mixing cathode pole piece lithium-ion-power cell described herein is square layered laminate structure, battery is encapsulated as square by aluminum plastic film 8, barrier film 3 clad anode sheet 2 and negative plate 1, positive plate 2 and negative plate 1 are spaced, and described first negative electrode layer 9 and the second negative electrode layer 11 misplace in stacking and be separated by.Described capacitor type mixing cathode pole piece lithium-ion-power cell also includes lithium-ion battery electrolytes, described lithium-ion battery electrolytes is made up of solvent, electrolytic salt and additive, wherein solvent is grouped into by dimethyl carbonate (DMC), diethyl carbonate (DEC), Ethyl methyl carbonate (EMC), ethylene carbonate (EC) four-tuple, its volume basis is as follows: DMC accounts for 20%~30%, DEC accounts for 20%~30%, EMC accounts for 10%~20%, and EC accounts for 25%~50%.Described additive is made up of film for additive, anti-overcharge additive and high temperature additive, wherein, film for additive has vinylethylene carbonate (VEC), vinylene carbonate (VC), O.5~3.0% concentration is, O.5~3.0% anti-overcharge additive has cyclobenzene (CHB), biphenyl, dimethylbenzene, and concentration is, high temperature additive has 1, O.5~3.0% 3-propane sultone (AS), phthalic anhydride (PA), its concentration is.
Embodiment 3
As it is shown on figure 3, the spaced winding of described negative plate 1, positive plate 2 and barrier film 3 forms cylindrical-shaped structure.Capacitor type mixing cathode pole piece lithium-ion-power cell described herein is cylindrical winding-structure, battery core after winding is arranged in cylindrical steel 4, barrier film 3 clad anode sheet 2 and negative plate 1, positive plate 2 and negative plate 1 are spaced, described first negative electrode layer 9 and the second negative electrode layer 11 misplace in stacking and are separated by, and be welded with block 6, be provided with insulating trip 5 between block 6 and battery core above box hat 4, block 6 is connected with positive plate 2, is connected with negative plate 1 bottom box hat 4.
Embodiment 4
As shown in Figure 4, described positive plate 2 is three-layer composite structure, and described positive plate 2 includes plus plate current-collecting body layer 12 and is coated in the positive electrode material layer 7 of plus plate current-collecting body layer 12, and described plus plate current-collecting body layer 12 is aluminium foil.
The above, preferred embodiment the most of the present utility model, not this utility model is made any pro forma restriction;The those of ordinary skill of all industry all can shown in by specification accompanying drawing and the above and implement this utility model swimmingly;But, all those skilled in the art in the range of without departing from technical solutions of the utility model, available disclosed above technology contents and a little change made, the equivalent variations modifying and develop, be Equivalent embodiments of the present utility model;Meanwhile, all any equivalent variations above example made according to substantial technological of the present utility model change, modify and differentiation etc., within all still falling within the protection domain of the technical solution of the utility model.

Claims (6)

  1. null1. a capacitor type mixing cathode pole piece lithium-ion-power cell,Including negative plate (1)、Positive plate (2) and barrier film (3),Described negative plate (1)、Positive plate (2) and barrier film (3) spaced winding or stack design,Described barrier film (3) is arranged between negative plate (1) and positive plate (2),It is characterized in that: described negative plate (1) is mixing cathode pole piece,Described mixing cathode pole piece is three-layer composite structure,Described cathode pole piece includes the first negative electrode layer (9)、Second negative electrode layer (11) and negative current collector layer (10),Described first negative electrode layer (9) and the second negative electrode layer (11) are respectively coated on the back and the sunny side of negative current collector layer (10),Described first negative electrode layer (9) is lithium titanate anode material layer,Described second negative electrode layer (11) is graphite cathode material layer,Described positive plate (2) is three-layer composite structure,Described positive plate (2) includes plus plate current-collecting body layer (12) and is coated in the positive electrode material layer (7) of plus plate current-collecting body layer (12),Described positive electrode material layer (7) is lithium iron phosphate positive material layer、Manganate cathode material for lithium layer、Lithium cobaltate cathode material layer or nickel-cobalt-manganternary ternary anode material layer.
  2. Capacitor type mixing cathode pole piece lithium-ion-power cell the most according to claim 1, it is characterised in that: described first negative electrode layer (9) and the second negative electrode layer (11) misplace in winding or stacking and are separated by.
  3. Capacitor type mixing cathode pole piece lithium-ion-power cell the most according to claim 2, it is characterised in that: the spaced winding of described negative plate (1), positive plate (2) and barrier film (3) forms cylindrical-shaped structure.
  4. Capacitor type mixing cathode pole piece lithium-ion-power cell the most according to claim 2, it is characterised in that: described negative plate (1), positive plate (2) and barrier film (3) spaced stratification square structure.
  5. 5. according to the capacitor type mixing cathode pole piece lithium-ion-power cell described in claim 3 or 4, it is characterised in that: described negative current collector layer (10) is Copper Foil.
  6. Capacitor type mixing cathode pole piece lithium-ion-power cell the most according to claim 5, it is characterised in that: described barrier film (3) is PE barrier film, PP barrier film or PE/PP composite diaphragm.
CN201520972639.6U 2015-11-30 2015-11-30 Mixed negative pole pole piece lithium ion power batteries of electric capacity type Expired - Fee Related CN205429091U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105406131A (en) * 2015-11-30 2016-03-16 李朝 Capacitive type lithium-ion power battery with hybrid negative electrode plates
CN109428051A (en) * 2017-08-31 2019-03-05 宁德时代新能源科技股份有限公司 Lithium ion battery and positive plate thereof
WO2024061011A1 (en) * 2022-09-22 2024-03-28 华为技术有限公司 Lithium-ion battery and electric device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105406131A (en) * 2015-11-30 2016-03-16 李朝 Capacitive type lithium-ion power battery with hybrid negative electrode plates
CN109428051A (en) * 2017-08-31 2019-03-05 宁德时代新能源科技股份有限公司 Lithium ion battery and positive plate thereof
WO2024061011A1 (en) * 2022-09-22 2024-03-28 华为技术有限公司 Lithium-ion battery and electric device

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Granted publication date: 20160803

Termination date: 20161130