CN106684319A - Single-surface similar pole plate, light battery cell containing same and preparation method of single-surface similar pole plate - Google Patents
Single-surface similar pole plate, light battery cell containing same and preparation method of single-surface similar pole plate Download PDFInfo
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- CN106684319A CN106684319A CN201611207153.9A CN201611207153A CN106684319A CN 106684319 A CN106684319 A CN 106684319A CN 201611207153 A CN201611207153 A CN 201611207153A CN 106684319 A CN106684319 A CN 106684319A
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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 a single-surface similar pole plate. The single-surface similar pole plate comprises an active material coating layer, a foil and a non-active material coating layer, wherein the active material coating layer and the non-active material coating layer are respectively coated at two sides of the foil. The invention also proposes a light battery cell, the single-surface similar pole plate is used as the outermost layer of a multi-layer lamination sheet, and the non-active material coating layer is arranged at an outer side of the foil used as a current collector. With the single-surface similar pole plate proposed by the invention, deformation or curing caused by unbalanced stress on the current collector during rolling of the single-surface similar pole plate can be reduced; by coating the light material coating layer at the other side of the single-surface similar pole plate, the stress generated by the rolling process is balanced, and the production continuality of the rolling process of the single-surface similar pole plate is improved. In a light battery cell structure proposed by the invention, by optimization design of the battery cell structure, the dosage of the current collector material or the dosage of a negative electrode coating layer is reduced, the weight of the battery cell is favorably reduced on the condition of no change on the battery system design, and the energy density of the battery is improved.
Description
Technical field
The invention belongs to battery material field, and in particular to a kind of lithium battery pole slice and preparation method thereof.
Background technology
New-energy automobile is developed rapidly and electrokinetic cell system lightweight demand, for electrokinetic cell energy density, work(
Rate density proposes requirement higher.In order to effectively improve the specific energy of battery, the weight of non-active material in battery is reduced
It is a kind of more conventional way, such as reduces afflux body thickness, membrane thicknesses, improves pole piece compaction density.
For the battery of lamination, its structure is usually shown in Fig. 2, and outermost layer is negative pole, by both positive and negative polarity pole
Piece is alternately arranged and barrier film interval.Battery core to this conventional structure is analyzed, and its feature is：(1) outermost layer negative pole is applied
Layer is non-active region, is not involved in electrochemical reaction process；(2) outermost layer is Copper Foil, and surface density is more than aluminium foil.One side pole piece is
One kind is effectively reduced and causes the increased method of laminated batteries weight by feature (1).But, one side pole piece in nipping process,
Serious deformation or curling can occur because the lateral stress of collector two is different, cause on a large scale, continuously to produce.Therefore,
It is necessary to be designed one side pole piece technique, the continuous production of one side pole piece or class one side pole piece is reached, to realize light weight
Change the design and manufacture of battery core.
The content of the invention
For the art for problem above, the present invention constructs a kind of battery class one side pole of new structure
Piece, low density material is coated by one side pole piece opposite side so that it realizes that collector both sides should in follow-up nipping process
The equilibrium of power, so as to realize that class one side pole piece is continuously produced.Based on such one side pole piece, lightweight is carried out to cell lamination structure
Design, further reduces non-active material weight in battery, so that, realize the lifting of battery energy density.
The present invention also proposes the preparation method of the class one side pole piece.
Realize that above-mentioned purpose technical scheme of the present invention is：
One species one side pole piece, is made up of active material coating, foil, non-active material coating, active material coating and
Non-active material coating is respectively coated on the both sides of the foil,
The non-active material includes one or more in carbon material, organic polymer material and inorganic oxide, its
In, the carbon material is selected from one or more in carbon black, graphite, CNT, Graphene, carbon fiber；The organic polymer
Thing material is selected from polyethylene (PE), polypropylene (PP), polyurethane (PU), acid polyethylene (PVC), polystyrene (PS), poly- to benzene
In naphthalate (PET), polymethyl methacrylate (PMMA), acid polyethylene (PVC) and melamine resin (MF) one
Plant or various；Selected inorganic oxide is selected from the one kind in silica, aluminum oxide, magnesia, aluminium hydroxide and magnesium hydroxide
Or it is various.
Wherein, the appearance structure of the non-active material be particle, fiber or microballoon, the microballoon be solid microsphere or
Tiny balloon.
Wherein, the grain diameter is 10nm~100 micron, and the Fiber Aspect Ratio is 10~1000, the particle diameter of microballoon
It is 10nm~100 micron.
Preferably, the appearance structure of the non-active material is particle, fiber or microballoon；The grain diameter is 50nm
~5 microns；The Fiber Aspect Ratio is 20~50.
The particle diameter of the microballoon is preferably 1~20 micron.
Further, the class one side pole piece is prepared by following steps：
(1) the one side coating containing active material is prepared in the side of foil；
(2) in foil opposite side coat inactive material coating,
(3) pole piece for being obtained to step (2) or pole volume carry out roll-in, cut.
Wherein described non-active material coating is prepared by the following method：By non-active material, bonding agent, solvent according to matter
Amount number 8~10:1:, be applied to gained slurry on foil after dispersed with stirring by 8~12 mixing.
Preferably, the stirring operation of slurry is：20~50rpm of rotating speed stir 3~10 minutes, then with rotating speed 2000~
8000rpm stirs 40min~80min.
Wherein, the bonding agent is Kynoar or polytetrafluoroethylene (PTFE), and the solvent is N- methyl pyrrolidones, carboxylic
One or more in sodium carboxymethylcellulose pyce, water.
Further, the surface density of the non-active material coating of the class one side pole piece is 3~5mg/cm2, active material
The surface density of coating is 18~25mg/cm2。
A kind of lightweight battery core, using class one side pole piece of the present invention as the outermost layer of multi-layer stacks, the class one side
Positioned at the outside of the foil as collector, (" outward ", " interior " orientation are to be with lamination center to the non-active material coating of pole piece
It is interior).
Described lightweight battery core, there is two kinds of structures：Positioned at the outermost two classes one side pole piece of multi-layer stacks, simultaneously for
Non-active material coating, another side are positive electrode active materials, and the foil is Copper Foil；Or, one side be non-active material coating, it is another
It is simultaneously negative active core-shell material, the foil is aluminium foil.
The mark mode that P, negative pole are designated as N is designated as by usual positive pole, following two formula is can be expressed as：
Structure one：P2-S-{N1-S-P1-S-N1}n-S-P2
Structure two：N2-S-{P1-S-N1-S-P1}n-S-N2
Wherein, P1 represents two-sided anode pole piece, N1 and represents two-sided cathode pole piece, and P2 represents positive pole class one side pole piece, N2 generations
Table negative pole class one side pole piece；N ＞ 1.
Both structures are applied to different battery systems.The first is applied to negative pole for graphite-like, collector are Copper Foil
System, using positive pole one side pole piece in outermost layer, it is possible to reduce a piece of cathode pole piece, because the density of copper is relatively large, subtract
Weight degree is more obvious.It is the battery system of lithium titanate that second is applied to negative pole, and such battery plus-negative plate foil is aluminium foil,
The density of lithium titanate is larger, therefore, using negative pole one side pole piece, the weight of lithium titanate in outermost layer negative pole coating can be subtracted.
Wherein, the slurry that the positive electrode coating in the battery of multi-layer stacks is used for positive electrode active materials, binding agent, lead
Electric agent mixing dispersion is formed；The slurry that negative material coating in laminated batteries is used is negative active core-shell material, binding agent, conduction
Agent mixing dispersion is formed；The conductive agent is acetylene black or carbon black, and the binding agent is Kynoar, N- crassitudes
One or more in ketone, sodium carboxymethylcellulose.
Wherein, the positive electrode active materials are selected from nickel cobalt manganese or nickel cobalt aluminium ternary material, and the negative active core-shell material is stone
One or more in ink, Graphene, lithium titanate, CNT.
Compared with prior art, the present invention has advantages below：
Become caused by collector unbalanced stress weighing apparatus when class one side pole piece proposed by the present invention can reduce one side pole piece roll-in
Shape or curling, light material coating is coated by one side pole piece opposite side, and equilibrium is carried out to the stress that roll process is produced, and is carried
The continuity of one side pole piece roll process production high.
Lightweight core strueture proposed by the present invention, using foregoing class one side pole piece, by core strueture optimization design, drop
The consumption and the usage amount of positive pole or negative pole coating of low current collector material, are conducive to not changing battery system design
Under the conditions of, battery core weight is reduced, the energy density of battery is lifted, and the technology has universality to different battery systems.
Brief description of the drawings
Fig. 1 class one side anode pole piece structural representations of the invention.
Fig. 2 prior art lamination type electric cored structure (routine) schematic diagram.
Fig. 3 present invention design lightweight battery core (structure one).
Fig. 4 present invention design lightweight battery core (structure two).
In figure, 101 is positive electrode active materials coating, and 102 is positive plate non-active material coating, and 201 is positive plate afflux
Body, 301 be negative active core-shell material coating, 302 be negative plate non-active material coating, 401 be negative plate collector, 501 be every
Film.
Specific embodiment
The present invention is illustrated below by most preferred embodiment.Those skilled in the art institute it should be understood that, embodiment is only used for
Illustrate rather than for limiting the scope of the present invention.
In embodiment, unless otherwise instructed, means used are the conventional means in this area.
In the material for being used, 40~100 nanometers of particle size carbon black, purchased from the Shanghai Aladdin limited public affairs of biochemical technology share
Department, polystyrene microsphere particle diameter is 5~10 microns, and purchased from Shanghai Aladdin biochemical technology limited company, acid polyethylene is empty
Heart microspherulite diameter is 10~20 microns, and purchased from Japanese ponding Co., Ltd., 5~20 microns of hollow silica ball particle diameter is purchased from
3M companies.
Other materials is purchased in market in example.
Preparative Example 1 prepares anode sizing agent
Table 1 is the formula information of two quasi-representative anode sizing agents, and glue, homogenate operation are carried out according to the formula of table 1, prepares positive pole
Slurry.Proportioning in table 1~3 refers to mass ratio.
The anode sizing agent of table 1 is matched
| Anode sizing agent is numbered | Positive pole pole material | Conductive agent | Bonding agent | Proportioning |
| 1.1 | NCM | Carbon black | PVDF | 95:3:2 |
| 1.2 | NCA | Carbon black | PVDF | 90:6:4 |
Preparative Example 2 prepares cathode size
Table 2 is the formula information of two quasi-representative cathode sizes, and glue, homogenate operation are carried out according to the formula of table 2, prepares negative pole
Slurry.
The negative pole of table 2 homogenate proportioning
| Anode sizing agent is numbered | Negative material | Conductive agent | Bonding agent | Proportioning |
| 2.1 | Graphite | Carbon black | PVDF | 94:2:4 |
| 2.2 | Lithium titanate | Carbon black | PVDF | 90:6:4 |
Preparative Example 3 prepares non-active material slurry
Table 3 is the formula information of four class non-active material slurries, according to the parameter of table 3, by non-active material, bonding agent, molten
Agent is according to 90:10:100 mixing, 30rpm is stirred 5 minutes；5000rpm is stirred 1 hour.
The non-active material formula of size information of table 3
| Nonactive slurry numbering | Non-active material | Bonding agent | Solvent |
| 3.1 | Carbon black | PVDF | NMP |
| 3.2 | Polystyrene microsphere | PVDF | NMP |
| 3.3 | Acid polyethylene tiny balloon | PVDF | NMP |
| 3.4 | Hollow silica ball | PVDF | NMP |
Comparative example 1~5
1) anode pole piece is prepared：According to the parameter of table 4, select anode sizing agent, be coated, roll-in, film-making, complete it is two-sided just
The preparation of pole pole piece P1, pole piece structure is as shown in Fig. 1 its (1).
2) cathode pole piece is prepared：According to the parameter of table 4, select cathode size, be coated, roll-in, film-making, complete it is two-sided just
The preparation of pole pole piece N1, in pole piece structure such as Fig. 1 shown in its (2).
3) battery core assembling：Battery core assembling is assembled according to the assembling form of conventional battery core, i.e., outermost layer is negative pole, positive and negative
Pole replaces, and is spaced by barrier film 501, except the number of laminations of outermost layer pole piece is 6.Core strueture is as shown in Figure 2.In Fig. 2, S tables
Show barrier film.
The pole piece of 4 comparative example of table 1~5 is constituted
Embodiment 1~8
1) anode pole piece is prepared：According to the parameter of table 5, select anode sizing agent, be coated, roll-in, film-making, complete it is two-sided just
The preparation of pole pole piece P1, in pole piece structure such as Fig. 1 shown in (1).
2) cathode pole piece is prepared：According to the parameter of table 5, select cathode size, be coated, roll-in, film-making, complete it is two-sided just
The preparation of pole pole piece N1, in pole piece structure such as Fig. 1 shown in (3).
3) class one side anode pole piece is prepared
According to the parameter of table 5, select anode sizing agent and non-active material, be coated, roll-in, film-making, complete class one side just
The preparation of pole pole piece P2, in pole piece structure such as Fig. 1 shown in (2).
4) battery core assembling：Battery core assembling is assembled according to lightweight battery core (structure one), i.e., outermost is to use class list
Face anode pole piece, positive plate non-active material coating 102 is faced outwardly, and positive electrode active materials coating 101 inwardly, leads between all pole pieces
Cross barrier film 501 to be spaced apart, core strueture is as shown in Figure 3.
Embodiment 9~12
1) anode pole piece is prepared：According to the parameter of table 5, select anode sizing agent, be coated, roll-in, film-making, complete it is two-sided just
The preparation of pole pole piece P1, in pole piece structure such as Fig. 1 shown in (1).
2) cathode pole piece is prepared：According to the parameter of table 5, select cathode size, be coated, roll-in, film-making, complete it is two-sided just
The preparation of pole pole piece N1, in pole piece structure such as Fig. 1 shown in (3).
3) class one side cathode pole piece is prepared
According to the parameter of table 4, select cathode size and non-active material, be coated, roll-in, film-making, complete class one side just
The preparation of pole pole piece.
Pole piece structure is as shown in N2 in Fig. 1.
4) battery core assembling：Battery core assembling is assembled according to lightweight battery core (structure two), i.e., outermost is to use class list
Face cathode pole piece, negative plate non-active material coating 302 is faced outwardly, and negative active core-shell material coating 301 inwardly, leads between all pole pieces
Cross barrier film to be spaced apart, core strueture is as shown in Figure 4.
The pole piece of 5 embodiment of table 1~5 is constituted
Fig. 3 shows the lightweight battery core of structure one, and structure one is represented by：P2-S-{N1-S-P1-S-N1}n-S-P2
For negative current collector is the battery system of Copper Foil, core strueture anode pole piece P1 quantity is n pieces, cathode pole piece N1 numbers
It is n+1 pieces to measure, and outermost is that, using class one side anode pole piece P2, nonactive coating is faced outwardly, positive pole coating inwardly, all pole pieces
Between by barrier film 501 be spaced apart.Compared with conventional laminated cell, 1 layer of cathode pole piece is reduced, increased 1 layer of plus plate current-collecting body
And 2 layers of nonactive coating.
Fig. 4 shows the lightweight battery core of structure two：N2-S- { P1-S-N1-S-P1 } n-S-N2 is applied to negative current collector
It is the battery system of aluminium foil, core strueture cathode pole piece N1 quantity is n pieces, and anode pole piece P1 quantity is n+1 pieces, and outermost is to make
With class one side cathode pole piece N2, nonactive coating is faced outwardly, and negative pole coating inwardly, is spaced apart between all pole pieces by barrier film.With
Conventional laminated cell is compared, and reduces 1 layer of positive pole pole pole piece, increased 1 layer of negative current collector and 2 layers of nonactive coating.
Conventional structure is：N1-S-{P1-S-N1-S-P1}n-S-N1.Outermost layer is two-sided cathode pole piece, and battery core is by just
Cathode pole piece is alternately stacked, and centre is spaced using barrier film, and battery process is relatively simple.
The embodiment of table 6 and comparative example battery core weight
| Battery core weight | Battery core loss of weight (g) | Battery core loss of weight degree | |
| Embodiment 1 | 152.29 | 5.96 | 3.92% |
| Embodiment 2 | 152.01 | 6.24 | 4.10% |
| Embodiment 3 | 151.74 | 6.51 | 4.29% |
| Embodiment 4 | 151.46 | 6.79 | 4.48% |
| Comparative example 1 | 158.25 | -- | -- |
| Embodiment 5 | 151.67 | 6.41 | 4.23% |
| Embodiment 6 | 151.39 | 6.68 | 4.42% |
| Embodiment 7 | 151.12 | 6.96 | 4.61% |
| Embodiment 8 | 150.84 | 7.23 | 4.80% |
| Comparative example 2 | 158.07 | -- | -- |
| Embodiment 9 | 150.24 | 9.47 | 6.30% |
| Embodiment 10 | 149.42 | 10.30 | 6.89% |
| Embodiment 11 | 294.67 | 10.30 | 3.49% |
| Embodiment 12 | 439.92 | 10.30 | 2.34% |
| Comparative example 3 | 159.71 | -- | -- |
| Comparative example 4 | 304.96 | -- | -- |
| Comparative example 5 | 450.21 | -- | -- |
The result of table 6 shows, using class one side pole piece of the present invention, effectively alleviates the weight of battery core.Embodiment 9,10
Structure two is used, one layer of negative pole coating is reduced compared to traditional structure, because lithium titanate anode surface density is larger, coating weight
Amount is relatively large, therefore, weight loss effect becomes apparent.
Embodiment above is only that the preferred embodiment of the present invention is described, and not the scope of the present invention is entered
Row is limited, and on the premise of design spirit of the present invention is not departed from, this area ordinary skill technical staff is to technical side of the invention
The all variations and modifications that case is made, all should fall into the protection domain of claims of the present invention determination.
Claims (15)
1. a species one side pole piece, it is characterised in that be made up of active material coating, foil, non-active material coating, active material
Material coating and non-active material coating are respectively coated on the both sides of the foil,
The non-active material includes one or more in carbon material, organic polymer material and inorganic oxide.
2. class one side pole piece according to claim 1, it is characterised in that, the carbon material is selected from carbon black, graphite, carbon and receives
One or more in mitron, Graphene, carbon fiber；The organic polymer material be selected from polyethylene, polypropylene, polyurethane,
In acid polyethylene, polystyrene, polyethylene terephthalate, polymethyl methacrylate, acid polyethylene and melamine resin
One or more；Selected inorganic oxide is selected from silica, aluminum oxide, magnesia, aluminium hydroxide and magnesium hydroxide
One or more.
3. class one side pole piece according to claim 1, it is characterised in that the appearance structure of the non-active material for
Grain, fiber or microballoon；The microballoon is solid microsphere or tiny balloon.
4. class one side pole piece according to claim 3, it is characterised in that the grain diameter is 10nm~100 micron, institute
It is 10~1000 to state Fiber Aspect Ratio, and the particle diameter of the microballoon is 10nm~100 micron.
5. class one side pole piece according to claim 4, it is characterised in that the grain diameter is 50nm~5 micron；It is described
Fiber Aspect Ratio is 20~50.
6. class one side pole piece according to claim 4, it is characterised in that the particle diameter of the microballoon is 1~20 micron.
7. the class one side pole piece according to any one of claim 1~6, it is characterised in that the class one side pole piece by with
It is prepared by lower step：
(1) the one side coating containing active material is prepared in the side of foil；
(2) in foil opposite side coat inactive material coating,
(3) pole piece for being obtained to step (2) or pole volume carry out roll-in, cut.
8. class one side pole piece according to claim 7, it is characterised in that the non-active material coating is by the following method
Prepare：By non-active material, bonding agent, solvent according to mass ratio 8~10:1:8~12 mixing, after dispersed with stirring, by gained
Slurry is applied on foil.
9. class one side pole piece according to claim 8, it is characterised in that the stirring operation of slurry is：20~50rpm of rotating speed
Stirring 3~10 minutes, then 40min~80min is stirred with 2000~8000rpm of rotating speed.
10. class one side pole piece according to claim 8, it is characterised in that the bonding agent is Kynoar or poly- four
PVF, the solvent is one or more in 1-METHYLPYRROLIDONE, sodium carboxymethylcellulose, water.
11. class one side pole pieces according to claim 7, it is characterised in that the non-active material of the class one side pole piece is applied
The surface density of layer is 3~5mg/cm2, the surface density of active material coating is 18~25mg/cm2。
12. a kind of lightweight battery cores, it is characterised in that using class one side pole piece described in any one of claim 1~11 as multilayer
The outermost layer of lamination, the non-active material coating of the class one side pole piece is located at the outside as the foil of collector.
13. lightweight battery cores according to claim 12, it is characterised in that positioned at the outermost two class lists of multi-layer stacks
Face pole piece is simultaneously non-active material coating, another side is positive electrode active materials, and the foil is Copper Foil；Or, one side is non-live
Property material coating, another side be negative active core-shell material, the foil be aluminium foil.
14. lightweight battery cores according to claim 12, it is characterised in that the positive electrode coating of the battery of multi-layer stacks
The slurry for using is formed for positive electrode active materials, binding agent, conductive agent mixing dispersion；Negative material coating in laminated batteries is adopted
Slurry is that negative active core-shell material, binding agent, conductive agent mixing dispersion are formed；The conductive agent is acetylene black or carbon black, institute
It is one or more in Kynoar, 1-METHYLPYRROLIDONE, sodium carboxymethylcellulose to state binding agent.
The 15. lightweight battery core according to any one of claim 12~14, it is characterised in that the positive electrode active materials choosing
From nickel cobalt manganese or nickel cobalt aluminium ternary material, the negative active core-shell material is in graphite, lithium titanate, Graphene, CNT
Plant or various.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611207153.9A CN106684319A (en) | 2016-12-23 | 2016-12-23 | Single-surface similar pole plate, light battery cell containing same and preparation method of single-surface similar pole plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611207153.9A CN106684319A (en) | 2016-12-23 | 2016-12-23 | Single-surface similar pole plate, light battery cell containing same and preparation method of single-surface similar pole plate |
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| CN106684319A true CN106684319A (en) | 2017-05-17 |
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| CN109921099A (en) * | 2019-02-26 | 2019-06-21 | 深圳吉阳智能科技有限公司 | A kind of laminating equipment |
| CN110212201A (en) * | 2019-06-13 | 2019-09-06 | 桑顿新能源科技(长沙)有限公司 | Battery core, battery pole piece and preparation method thereof, battery |
| CN110943222A (en) * | 2019-04-15 | 2020-03-31 | 宁德时代新能源科技股份有限公司 | Electrode plate and electrochemical device |
| CN112271299A (en) * | 2020-10-26 | 2021-01-26 | 珠海冠宇动力电池有限公司 | Laminated battery core and lithium ion battery |
| CN112349953A (en) * | 2020-10-27 | 2021-02-09 | 珠海冠宇动力电池有限公司 | Lithium ion battery |
| CN112687834A (en) * | 2020-12-25 | 2021-04-20 | 珠海冠宇动力电池有限公司 | Battery cell, manufacturing method of battery cell and battery |
| CN113036078A (en) * | 2021-03-08 | 2021-06-25 | 珠海冠宇动力电池有限公司 | End pole piece of laminated battery cell, laminated battery cell and corresponding preparation method |
| WO2023092300A1 (en) * | 2021-11-23 | 2023-06-01 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery, and electric apparatus |
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| CN109921099A (en) * | 2019-02-26 | 2019-06-21 | 深圳吉阳智能科技有限公司 | A kind of laminating equipment |
| CN110943222A (en) * | 2019-04-15 | 2020-03-31 | 宁德时代新能源科技股份有限公司 | Electrode plate and electrochemical device |
| CN110212201A (en) * | 2019-06-13 | 2019-09-06 | 桑顿新能源科技(长沙)有限公司 | Battery core, battery pole piece and preparation method thereof, battery |
| CN110212201B (en) * | 2019-06-13 | 2021-05-18 | 桑顿新能源科技(长沙)有限公司 | Battery core, battery pole piece, preparation methods of battery pole piece and battery |
| CN112271299A (en) * | 2020-10-26 | 2021-01-26 | 珠海冠宇动力电池有限公司 | Laminated battery core and lithium ion battery |
| CN112349953A (en) * | 2020-10-27 | 2021-02-09 | 珠海冠宇动力电池有限公司 | Lithium ion battery |
| CN112687834A (en) * | 2020-12-25 | 2021-04-20 | 珠海冠宇动力电池有限公司 | Battery cell, manufacturing method of battery cell and battery |
| CN113036078A (en) * | 2021-03-08 | 2021-06-25 | 珠海冠宇动力电池有限公司 | End pole piece of laminated battery cell, laminated battery cell and corresponding preparation method |
| WO2023092300A1 (en) * | 2021-11-23 | 2023-06-01 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery, and electric apparatus |
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