CN104600368A - Ternary soft-package battery and preparation method thereof - Google Patents
Ternary soft-package battery and preparation method thereof Download PDFInfo
- Publication number
- CN104600368A CN104600368A CN201410837212.5A CN201410837212A CN104600368A CN 104600368 A CN104600368 A CN 104600368A CN 201410837212 A CN201410837212 A CN 201410837212A CN 104600368 A CN104600368 A CN 104600368A
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- Prior art keywords
- barrier film
- copper foil
- package battery
- diaphragm
- thickness
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Classifications
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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
-
- 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/431—Inorganic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms 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 belongs to the technical field of a lithium battery, and relates to a ternary soft-package battery with high safety and long service life and a preparation method of the ternary soft-package battery. According to the technical scheme, the ternary soft-package battery comprises a cell, and is characterized in that the cell is formed by respectively laminating a diaphragm, a copper foil, a diaphragm, a copper foil, a single-side-coated negative piece, a diaphragm, a conventional double-side-coated positive piece, a diaphragm and a conventional double-side-coated negative piece from outside to inside. The diaphragm is a nonwoven fabric ceramic diaphragm with thickness of 20 to 40 micrometers, the nonwoven fabric ceramic diaphragm is a nonwoven fabric basic layer double-side-coated Al2O3 ceramic layer, the thickness of a nonwoven fabric basic layer is 16 to 32 micrometers, and the thickness of the single-side ceramic layer is 2 to 4 micrometers. The copper foil, the single-side-coated negative piece and the conventional double-side-coated negative piece are identical in size, and the thickness of the copper foil is 10 to 12 micrometers.
Description
Technical field
The invention belongs to technical field of lithium batteries, relate to a kind of high security, long-life ternary soft-package battery and preparation method thereof.
Background technology
Ternary soft-package battery energy density is large, but its cycle life is not as good as ferric phosphate lithium cell at present, the thermal stability of ternary material itself is poor, cause ternary soft-package battery security performance compared with ferric phosphate lithium cell relatively poor, especially battery acupuncture is on fire, seriously hinders the development of ternary soft-package battery at dynamic field.
Along with the appearance of national new-energy automobile strategy, ternary method for soft package lithium ion power and battery pack market scale thereof will increase fast.According to the market demand, must using the emphasis of ternary soft-package battery properties lifting as research and development, the especially lifting of security performance and cycle performance, object makes its development being more suitable for new-energy automobile.
Summary of the invention
The object of this invention is to provide a kind of high security, long-life ternary soft-package battery preparation method, solution makes ternary soft-package battery not only have high-energy-density, also has good security performance and cycle life.
For achieving the above object, the technical scheme that this patent adopts is:
Ternary soft-package battery, comprises battery core, it is characterized in that, forms battery core by export-oriented middle folding respectively into barrier film 1, Copper Foil 2, barrier film, Copper Foil, one side coating negative plate 3, barrier film, conventional dual coating positive plate 4, barrier film, conventional dual coating negative plate.
Ternary soft-package battery according to claim 1, is characterized in that, described barrier film is the nonwoven fabrics ceramic diaphragm of 20 ~ 40 μm of thickness, and nonwoven fabrics ceramic diaphragm is non-woven substrate dual coating Al
2o
3ceramic layer, nonwoven fabric base layer thickness 16 ~ 32 μm, one side ceramic layer thickness 2 ~ 4 μm.
Ternary soft-package battery according to claim 1, is characterized in that, described Copper Foil, one side coating negative plate 3 and conventional dual coating negative plate measure-alike, copper thickness 10 ~ 12 μm.
Prepare a method for ternary soft-package battery according to claim 1, comprise prepare pole piece, lamination, tab welding, encapsulation and and battery core baking, it is characterized in that,
Described pole piece of preparing comprises the batching of coat, pole coating, roll-in, hot-forming and film-making;
Described battery core baking procedure is:
1. 100 ~ 110 DEG C of high-temperature heating 10 ~ 30min,
2. heating 3 ~ 5min is vacuumized, vacuum degree-0.09 ~-0.1 MPa,
3. under-0.09 ~-0.1 MPa pressure condition, heating in vacuum 60 ~ 120min is protected,
4. high pure nitrogen heating 3 ~ 5min is filled with,
5. to circulate 2. ~ 4. step 8 ~ 12 time, baking time 12 ~ 24h.
Other technology of the present invention is this area conventional processing technique.
Advantage of the present invention and effect are:
1. the present invention uses nonwoven fabrics ceramic diaphragm to prepare ternary soft-package battery, and barrier film imbibition, to hold liquid ability strong, improves the cycle life of battery.
2. the present invention uses nonwoven fabrics ceramic diaphragm to prepare ternary soft-package battery, and nonwoven fabrics ceramic diaphragm resistance to elevated temperatures is good, and when battery core is damaged, barrier film can not quick-break, improves the security performance of battery.
3. the present invention's laminated cell lamination when lamination is folded into barrier film, Copper Foil, barrier film, the coating of Copper Foil one side negative plate, barrier film, conventional dual coating positive plate from outside to inside respectively, when battery core is subject to external world, electric current and heat can be derived rapidly by outer copper foil, alleviating inside battery material thermal runaway produces dangerous, improves the security performance of battery.
4. the present invention because of nonwoven fabrics ceramic diaphragm resistance to elevated temperatures good, battery core can carry out high-temperature baking, baking before without the need to carrying out strict humid control, saved production cost.
Accompanying drawing explanation
Fig. 1 is ternary Soft Roll laminated cell internal anatomy,
Reference numeral: 1, nonwoven fabrics ceramic diaphragm, 2, Copper Foil, 3, one side coating negative plate, 4, dual coating negative plate, 5, dual coating positive plate.
Embodiment
This patent is illustrated further.
Make the soft package lithium ion power battery of HTPN07140200-20Ah-3.6V model, first conventional formulations is carried out, then conventional negative pole one side coating is carried out, roll-in, film-making, negative pole dual coating, roll-in, film-making, positive pole dual coating, roll-in, film-making, carry out lamination again, laminated cell lamination is folded from outside to inside respectively into barrier film 1, Copper Foil 2, barrier film, Copper Foil, one side coating negative plate 3, barrier film, conventional dual coating positive plate 4, barrier film, conventional dual coating negative plate, battery core lamination mid portion is conventional dual coating positive plate 4, barrier film, conventional dual coating negative plate.
Its septation is 30 μm of thickness nonwoven fabrics ceramic diaphragms, and nonwoven fabrics ceramic diaphragm is non-woven substrate barrier film dual coating Al
2o
3ceramic layer, non-woven substrate membrane thicknesses 24 μm, one side ceramic layer thickness 3 μm.
Copper Foil, signal layer coating negative plate, two coating negative plate are measure-alike, copper thickness 10 μm.
Finally carry out tab welding, encapsulation, battery core baking, fluid injection, change into, drawing liquid is shaping, detect, put in storage.Battery film-making, lamination, tab welding, encapsulation, wherein battery core baking procedure is set as: 1. 100 ~ 110 DEG C of high-temperature heating 20min, 2. heating 5min is vacuumized, vacuum degree-0.09MPa, 3.-0.09MPa protects heating in vacuum 60min, 4. high pure nitrogen heating 5min is filled with, circulation 2. ~ 4. step 10 time, baking time 12h.
The HTPN07140200-20Ah-3.6V cycle performance of battery prepared reaches circulate 5000 capacity of 1C charge and discharge and keeps 85%, and lancing test is missing of ignition.
Claims (4)
1. ternary soft-package battery, comprise battery core, it is characterized in that, form battery core by export-oriented middle folding respectively into barrier film (1), Copper Foil (2), barrier film, Copper Foil, one side coating negative plate (3), barrier film, conventional dual coating positive plate (4), barrier film, conventional dual coating negative plate.
2. ternary soft-package battery according to claim 1, is characterized in that, described barrier film is the nonwoven fabrics ceramic diaphragm of 20 ~ 40 μm of thickness, and nonwoven fabrics ceramic diaphragm is non-woven substrate dual coating Al
2o
3ceramic layer, nonwoven fabric base layer thickness 16 ~ 32 μm, one side ceramic layer thickness 2 ~ 4 μm.
3. ternary soft-package battery according to claim 1, is characterized in that, described Copper Foil, one side coating negative plate (3) and conventional dual coating negative plate measure-alike, copper thickness 10 ~ 12 μm.
4. prepare a method for ternary soft-package battery according to claim 1, comprise prepare pole piece, lamination, tab welding, encapsulation and and battery core baking, it is characterized in that,
Described pole piece of preparing comprises the batching of coat, pole coating, roll-in, hot-forming and film-making;
Described battery core baking procedure is:
100 ~ 110 DEG C of high-temperature heating 10 ~ 30min,
Vacuumize heating 3 ~ 5min, vacuum degree-0.09 ~-0.1 MPa,
Heating in vacuum 60 ~ 120min is protected under-0.09 ~-0.1 MPa pressure condition,
Be filled with high pure nitrogen heating 3 ~ 5min,
Circulation 2. ~ 4. step 8 ~ 12 time, baking time 12 ~ 24h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410837212.5A CN104600368A (en) | 2014-12-29 | 2014-12-29 | Ternary soft-package battery and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410837212.5A CN104600368A (en) | 2014-12-29 | 2014-12-29 | Ternary soft-package battery and preparation method thereof |
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| CN104600368A true CN104600368A (en) | 2015-05-06 |
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| CN201410837212.5A Pending CN104600368A (en) | 2014-12-29 | 2014-12-29 | Ternary soft-package battery and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106816638A (en) * | 2017-03-02 | 2017-06-09 | 北京新能源汽车股份有限公司 | A kind of baking method and soft bag lithium ionic cell of Soft Roll lithium-ion electric core |
| WO2018023219A1 (en) * | 2016-07-30 | 2018-02-08 | 肖丽芳 | Preparation method for pouch battery |
| CN107994261A (en) * | 2017-11-27 | 2018-05-04 | 覃晓捷 | A kind of soft bag lithium ionic cell production method |
| CN113131088A (en) * | 2019-12-30 | 2021-07-16 | 荣盛盟固利新能源科技有限公司 | Lithium ion soft package battery |
| CN114695841A (en) * | 2022-04-25 | 2022-07-01 | 芜湖天弋能源科技有限公司 | Lithium ion battery positive pole piece, lithium ion battery and preparation method thereof |
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| CN114695841A (en) * | 2022-04-25 | 2022-07-01 | 芜湖天弋能源科技有限公司 | Lithium ion battery positive pole piece, lithium ion battery and preparation method thereof |
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Application publication date: 20150506 |
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