CN104201327A - Pole piece of lithium-ion energy storing battery and preparation method thereof - Google Patents
Pole piece of lithium-ion energy storing battery and preparation method thereof Download PDFInfo
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- CN104201327A CN104201327A CN201410399592.9A CN201410399592A CN104201327A CN 104201327 A CN104201327 A CN 104201327A CN 201410399592 A CN201410399592 A CN 201410399592A CN 104201327 A CN104201327 A CN 104201327A
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 51
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 36
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 12
- 239000011149 active material Substances 0.000 claims description 34
- 238000004146 energy storage Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 25
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 11
- 229910052727 yttrium Inorganic materials 0.000 claims description 11
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 11
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 7
- QUEDYRXQWSDKKG-UHFFFAOYSA-M [O-2].[O-2].[V+5].[OH-] Chemical compound [O-2].[O-2].[V+5].[OH-] QUEDYRXQWSDKKG-UHFFFAOYSA-M 0.000 claims description 7
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- 239000002033 PVDF binder Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 239000013543 active substance Substances 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 40
- 239000005030 aluminium foil Substances 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 239000011889 copper foil Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 208000032953 Device battery issue Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a pole piece of a lithium-ion energy storing battery. The pole piece comprises a current collector and active substance layers which are coated on the surfaces of positive and negative sides of the current collector, and is innovatively characterized in that arbitrary side edges, on which active substances are not coated, are reserved on the surfaces of the positive and negative sides of the current collector and serve as whole pole lugs of the battery, and PTC (Positive Temperature Coefficient) material layers are coated on the pole lugs of the battery. The invention also provides a preparation method for the pole piece of the lithium-ion energy storing battery. The preparation method is innovatively characterized by comprising the following steps: preparing the pole piece and the whole pole lugs of the battery, preparing a PTC slurry material and coating. By virtue of directly coating the PTC material on the reserved whole pole lugs, the pole piece of the lithium-ion energy storing battery ensures that when the temperature of the battery is increased to the Curie temperature of the PTC material due to abuse of the lithium-ion battery, an electronic insulation layer is formed because own resistance of the PTC material rises in a step change mode, and an open circuit is formed between the pole active substance layers connected with the PTC material and the current collector, so that the effective volume of the interior of the lithium-ion battery can be increased greatly.
Description
Technical field
The present invention relates to a kind of lithium-ion energy storage battery pole piece, the invention still further relates to a kind of manufacture method of lithium-ion energy storage battery pole piece, belong to lithium ion battery field.
Background technology
Lithium ion battery is development in recent years a kind of high energy battery rapidly, has occupied more than 30% market of portable energy source with remarkable chemical property, becomes the focus of domestic and international research and development.
Along with the development of electric automobile industry and distributed power grid industry, day by day urgent to the demand of jumbo lithium-ion energy storage battery.But its capacity is larger, also just larger for the challenge of fail safe.When lithium ion battery in short circuit, overcharge etc. while causing internal temperature of battery to raise under abuse condition, can there are a series of side reactions in inside battery, not only make battery failure, also may cause burning and blast.
In order to prevent burning or blast, lithium ion battery generally includes positive temperature coefficient (PTC) device of temperature protection function.In the time that PTC device reaches a design temperature, the resistance of this PTC device several orders of magnitude that can raise rapidly.PTC device is connected in the circuit of lithium ion battery, the resistance of utilizing this PTC device to increase suddenly can reduce even to cut off to overcharge/cross puts or the electric current of short circuit, can reach the object of safeguard protection lithium ion battery.
There are some researches show, ptc material can be added in cell positive material as powder granule additive, coated lithium material is made electrode.But add the method in material to as additive, one side PTC particle is subject to the impact in battery magnetic field and compares the large of routine in battery, its particle directly contacts with electrolyte and forms solid-liquid two-phase on the other hand, fact proved and use ptc material to replace graphite or carbon black to serve as the conductive agent of lithium ion battery, room temperature chemical property to battery is little, while only having temperature to spend higher than 80, the PTC effect of ptc material in battery just can strengthen greatly, can improve the thermal safety of lithium ion battery.
Summary of the invention
The object of the invention is to, for deficiency of the prior art, provides a kind of lithium-ion energy storage battery pole piece and preparation method thereof, realizes the function of integrated PTC device.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of lithium-ion energy storage battery pole piece, pole piece comprises collector and the active material layer that is coated in described collector tow sides surface, and its innovative point is: on described battery afflux liquid, tow sides surface respectively reserves any side that is not coated with active material as the full lug of battery; On the full lug of described battery, be coated with PTC pulp layer.
Further, the long-pending ratio of the coating surface of described active material layer and PTC pulp layer is 2:1 ~ 3:1.
Further, the gross thickness of described tow sides PTC pulp layer is 6～20 μ m.
Further, the normal temperature resistance of the ptc material in described PTC pulp layer is 0.005～1 Ω .cm, and Curie temperature is 90～120 DEG C.
Further, the ptc material in described PTC pulp layer is the vanadium trioxide material doped with rare earth element yttrium; The doping ratio of described rare earth element yttrium is 5%～50%.
Further, described electrodes of lithium-ion batteries is anode pole piece or cathode pole piece.
Another object of the present invention is to provide a kind of manufacture method of lithium-ion energy storage battery pole piece, be mainly according to the technique of lithium electricity and prepare burden, Coating on collector, cut out large stretch of, roll extrusion, itemize, finally makes length and the width of technological requirement, and its innovative point is: described Coating step comprises the coating of active material layer and the coating of PTC pulp layer;
The application step of described active material layer is on electrode plates, and tow sides respectively reserve the collector of 7～10mm as full lug; Part beyond full lug is coated in the double-edged surface of pole piece collector as active material layer using active material routine, and the double-edged gross thickness of active material layer is 6～20 μ m;
The application step of described PTC pulp layer is that the slurry containing ptc material is coated on the full lug of the reserved positive and negative of electrode as PTC pulp layer, the gross thickness that tow sides apply is 6～20 μ m, after coating completes, toast operation, the time that baking is set is 10～15h, and baking temperature is 200～500 DEG C;
Further, the compound method of described PTC slurry is by the vanadium trioxide V doped with 5%～50% rare earth element yttrium
2o
3powder is as ptc material, and the ratio with polyfluortetraethylene of binding element PVDF, solvent 1-METHYLPYRROLIDONE NMP are 90～93:4～10:3～10 according to the mass ratio of PTC:PVDF:NMP, is uniformly mixed the slurry of making containing ptc material.
Further, described battery pole piece is anode pole piece or cathode pole piece.
Further, when described electrode is negative pole, the reserved any side width that is not coated with active material is 8～10mm.
Beneficial effect of the present invention is as follows:
(1) lithium-ion energy storage battery pole piece of the present invention, on reserved full lug, directly apply ptc material, realize in the time that lithium ion battery generation abuse causes battery intensification to reach the Curie temperature of ptc material, because being phase step type rising, the self-resistance of ptc material forms electronic isolation layer, make to form and open circuit between the electrode active material layer that is attached thereto and collector, thereby greatly increased the dischargeable capacity of inside lithium ion cell, dischargeable capacity can increase to 1/6 ~ 1/4.
(2) improved the conventional thinking that needs to include the positive temperature coefficient of temperature protection function (PTC) device in lithium ion battery; PTC device is integrated on battery electrode; both can exert an influence to room temperature chemical property at normal temperatures; and positive pole and negative pole for battery are applicable equally; reduce the internal structure of lithium ion battery; the scale of having dwindled lithium ion battery itself, is conducive to apply on a large scale.
(3) manufacture method of lithium-ion energy storage battery pole piece of the present invention is simple and convenient, and preparation process is easy, and coating method is easy to operate, only need to process at electrode surface without increasing other parts, has saved production cost when producing good result; In this method committed step, adopted novel PTC slurry, adopted specific coating method, the internal resistance of cell of production is little, energy density is high and capacity density is high.
Brief description of the drawings
Be further detailed below in conjunction with the drawings and specific embodiments.
Fig. 1 is structural representation of the present invention.
In figure, comprise active material layer 1, PTC pulp layer 2, collector foil 3.
Fig. 2 is the vertical view of structural representation of the present invention.
In figure, comprise active material layer 1, PTC pulp layer 2.
Embodiment
Below in conjunction with specific embodiment, technical scheme of the present invention is elaborated.
Embodiment 1
A kind of lithium-ion energy storage battery positive plate: comprise collector 3 aluminium foils and the active material layer 1 that is coated in collector 3 aluminium foil tow sides surfaces, respectively reserve the 8.5mm side that is not coated with active material on the tow sides surface of collector 3 aluminium foils as the full lug of battery; On the full lug of battery, be coated with PTC pulp layer 2, the gross thickness of tow sides PTC pulp layer 2 is 15 μ m.
Wherein, the ptc material in PTC pulp layer 2 is the vanadium trioxide material doped with rare earth element yttrium; The doping ratio of rare earth element yttrium is 5%～50%, and the normal temperature resistance of ptc material is 0.005～1 Ω .cm, and Curie temperature is 90～120 DEG C.
The preparation method of lithium-ion energy storage battery anode pole piece: be mainly according to the technique of lithium electricity and prepare burden, Coating on collector, cut out large stretch of, roll extrusion, itemize, finally makes thick 120 μ m, wide 96mm, the long positive plate for 204mm, wherein Coating step comprises the coating of active material layer 1 and the coating of PTC pulp layer 2;
(1) application step of active material layer 1 is on electrode plates, and tow sides respectively reserve the collector of 8.5mm as full lug; Part beyond full lug is coated on the pole piece collector 3 double-edged surfaces of aluminium foil as active material layer 1 using active material routine, and the double-edged gross thickness of active material layer 1 is 18 μ m.
(2) application step of PTC pulp layer 2 is that the slurry containing ptc material is coated on the each reserved 8.5mm side of electrode positive and negative as PTC pulp layer 2, the gross thickness that tow sides apply is 15 μ m, after coating completes, toast operation, the time that baking is set is 12h, and baking temperature is 400 DEG C.
Wherein, the compound method of PTC slurry is by the vanadium trioxide V doped with 25% rare earth element yttrium
2o
3(its resistivity at room temperature is 0.05 Ω .cm to powder, but in the time that temperature exceedes 90 DEG C, resistivity reaches 4000 Ω .cm) as ptc material, ratio with polyfluortetraethylene of binding element PVDF, solvent 1-METHYLPYRROLIDONE NMP are 90:4:6 according to the mass ratio of PTC:PVDF:NMP, is uniformly mixed the slurry of making containing ptc material with conventional steps.
Embodiment 2
A kind of lithium-ion energy storage battery negative plate: comprise collector 3 Copper Foils and the active material layer 1 that is coated in collector 3 Copper Foil tow sides surfaces, the double-edged gross thickness of active material layer 1 is 16mm; On battery afflux liquid Copper Foil 3, tow sides surface respectively reserves the 7mm side that is not coated with active material as the full lug of battery; On the full lug of battery, be coated with PTC pulp layer 2, the gross thickness of tow sides PTC pulp layer 2 is: 19mm.
Wherein, the ptc material in PTC pulp layer 2 is the vanadium trioxide material doped with rare earth element yttrium; The doping ratio of rare earth element yttrium is 30%, and the normal temperature resistance of ptc material is 0.005～1 Ω .cm, and Curie temperature is 90～120 DEG C.
The preparation method of lithium-ion energy storage battery cathode pole piece: be mainly according to the technique of lithium electricity and prepare burden, Coating on collector, cut out large stretch of, roll extrusion, itemize, finally makes thick 88 μ m, wide 99mm, the long negative plate for 192mm, wherein the preparation of Coating step and PTC slurry is with reference to embodiment 1.
The battery dischargeable capacity that battery positive/negative plate based on embodiment 1 and embodiment 2 is made can increase 1/5, and battery is carried out to conventional electrochemistry capacitance loop test, can meet test request, meets actual needs.
Comparative example 1
A kind of lithium-ion energy storage battery both positive and negative polarity pole piece:
A kind of lithium-ion energy storage battery positive/negative plate, positive plate comprises collector 3 aluminium foils and the active material layer 1 that is coated in collector 3 aluminium foil tow sides surfaces, the thickness of active material layer 1 is 8.5mm; Negative plate comprises collector 3 Copper Foils and the active material layer 1 that is coated in copper foil of affluxion body tow sides surface, and the thickness of active material layer 1 is 7mm.
A kind of lithium-ion energy storage battery positive/negative plate manufacture method:
Positive plate manufacture method: be mainly according to the technique of lithium electricity and prepare burden, be coated with conventional coating layer of active substance 1 on collector 3 aluminium foils, then cut out large stretch of according to common process, roll extrusion, itemize, finally makes thick 120 μ m, wide 96mm, the long positive plate for 204mm.
Negative plate manufacture method: be mainly according to the technique of lithium electricity and prepare burden, on collector 3 Copper Foils, be coated with coating layer of active substance 1, then cut out sheet according to common process, roll extrusion, itemize, finally makes thick 88 μ m, wide 99mm, the long negative plate for 201mm.
According to common process, the anode pole piece of the present embodiment and cathode pole piece are made into lithium ion battery.
Comparative example 1 can find out with the lithium ion battery that lithium ion battery and comparative example 1 positive and negative electrode of embodiment 2 positive and negative electrodes formation are made, the room temperature resistance of battery of the present invention is below 1 Ω, transition temperature is 28 DEG C, high resistance flat roof area is 32 DEG C, after 35 DEG C, cell resistance declines, and conventional lithium ion battery is in whole temperature-rise period, be heated to after 400 ~ 410 DEG C, battery short circuit is blasted.
Claims (10)
1. a lithium-ion energy storage battery pole piece, pole piece comprises collector and is coated in the active material layer on described collector tow sides surface, it is characterized in that: on described battery afflux liquid, tow sides surface respectively reserves any side that is not coated with active material as the full lug of battery; On the full lug of described battery, be coated with PTC pulp layer.
2. lithium-ion energy storage battery pole piece according to claim 1, is characterized in that: the long-pending ratio of coating surface of described active material layer and PTC pulp layer is 2:1 ~ 3:1.
3. lithium-ion energy storage battery pole piece according to claim 1, is characterized in that: the gross thickness of described tow sides PTC pulp layer is 6～20 μ m.
4. lithium-ion energy storage battery pole piece according to claim 1, is characterized in that: the normal temperature resistance of the ptc material in described PTC pulp layer is 0.005～1 Ω .cm, and Curie temperature is 90～120 DEG C.
5. according to the lithium-ion energy storage battery pole piece described in claim 1 or 4, it is characterized in that: the ptc material in described PTC pulp layer is the vanadium trioxide material doped with rare earth element yttrium; The doping ratio of described rare earth element yttrium is 5%～50%.
6. lithium-ion energy storage battery pole piece according to claim 1, is characterized in that: described electrodes of lithium-ion batteries is anode pole piece or cathode pole piece.
7. realize the manufacture method of lithium-ion energy storage battery pole piece claimed in claim 1 for one kind, be mainly according to the technique of lithium electricity and prepare burden, Coating on collector, cut out large stretch of, roll extrusion, itemize, finally makes length and the width of technological requirement, it is characterized in that: described Coating step comprises the coating of active material layer and the coating of PTC pulp layer;
The application step of described active material layer is on electrode plates, and tow sides respectively reserve the collector of 7～10mm as full lug; Part beyond full lug is coated in the double-edged surface of pole piece collector as active material layer using active material routine, and the double-edged gross thickness of active material layer is 6～20 μ m;
The application step of described PTC pulp layer is that the slurry containing ptc material is coated on the full lug of the reserved positive and negative of electrode as PTC pulp layer, the gross thickness that tow sides apply is 6～20 μ m, after coating completes, toast operation, the time that baking is set is 10～15h, and baking temperature is 200～500 DEG C.
8. the manufacture method of lithium-ion energy storage battery pole piece according to claim 7, is characterized in that: the compound method of described PTC slurry is by the vanadium trioxide V doped with 5%～50% rare earth element yttrium
2o
3powder is as ptc material, and the ratio with polyfluortetraethylene of binding element PVDF, solvent 1-METHYLPYRROLIDONE NMP are 90～93:4～10:3～10 according to the mass ratio of PTC:PVDF:NMP, is uniformly mixed the slurry of making containing ptc material.
9. the manufacture method of lithium-ion energy storage battery pole piece according to claim 7, is characterized in that: described battery pole piece is anode pole piece or cathode pole piece.
10. the manufacture method of lithium-ion energy storage battery pole piece according to claim 7, is characterized in that: when described electrode is negative pole, the reserved any side width that is not coated with active material is 8～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410399592.9A CN104201327A (en) | 2014-08-14 | 2014-08-14 | Pole piece of lithium-ion energy storing battery and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410399592.9A CN104201327A (en) | 2014-08-14 | 2014-08-14 | Pole piece of lithium-ion energy storing battery and preparation method thereof |
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| CN104201327A true CN104201327A (en) | 2014-12-10 |
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| CN201410399592.9A Pending CN104201327A (en) | 2014-08-14 | 2014-08-14 | Pole piece of lithium-ion energy storing battery and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106596521A (en) * | 2017-02-06 | 2017-04-26 | 中天储能科技有限公司 | ICP-OES test method of content of elements in pole piece |
| CN107666014A (en) * | 2016-07-28 | 2018-02-06 | 万向二三股份公司 | A kind of safety-type soft package lithium ion cell polar ear |
| CN107768589A (en) * | 2016-08-15 | 2018-03-06 | 万向二三股份公司 | A kind of high safety type lithium ion battery with high energy density |
| CN111540937A (en) * | 2020-04-28 | 2020-08-14 | 天目湖先进储能技术研究院有限公司 | High-capacity secondary battery and use thereof |
| CN112186269A (en) * | 2019-07-02 | 2021-01-05 | 北京好风光储能技术有限公司 | Electric core of lithium slurry battery |
| CN112510215A (en) * | 2020-10-28 | 2021-03-16 | 中天超容科技有限公司 | Electrode pole piece, manufacturing method of electrode pole piece and electrochemical energy storage device |
| CN114497824A (en) * | 2021-12-31 | 2022-05-13 | 北京卫蓝新能源科技有限公司 | Adaptive temperature-limited cells, battery systems and PTC materials based on PTC materials |
| CN115485908A (en) * | 2021-04-15 | 2022-12-16 | 株式会社Lg新能源 | Electrode with improved safety and method for manufacturing the same |
| WO2023280104A1 (en) * | 2021-07-05 | 2023-01-12 | Damitz Thomas Gerhard Wilhelm | Battery cell for lithium ion battery |
| CN116581243A (en) * | 2023-07-12 | 2023-08-11 | 宁德时代新能源科技股份有限公司 | Electrode pole piece, its preparation method, secondary battery and electrical device |
| CN119029505A (en) * | 2024-10-22 | 2024-11-26 | 比亚迪股份有限公司 | Cells, Batteries and Electrical Devices |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107666014A (en) * | 2016-07-28 | 2018-02-06 | 万向二三股份公司 | A kind of safety-type soft package lithium ion cell polar ear |
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| CN112510215B (en) * | 2020-10-28 | 2021-10-12 | 中天超容科技有限公司 | Electrode pole piece, manufacturing method of electrode pole piece and electrochemical energy storage device |
| CN112510215A (en) * | 2020-10-28 | 2021-03-16 | 中天超容科技有限公司 | Electrode pole piece, manufacturing method of electrode pole piece and electrochemical energy storage device |
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