CN105470577A - Three-electrode assembly method of soft package lithium ion battery - Google Patents
Three-electrode assembly method of soft package lithium ion battery Download PDFInfo
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- CN105470577A CN105470577A CN201510085677.4A CN201510085677A CN105470577A CN 105470577 A CN105470577 A CN 105470577A CN 201510085677 A CN201510085677 A CN 201510085677A CN 105470577 A CN105470577 A CN 105470577A
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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 relates to the technical field of a lithium ion battery, in particular to a three-electrode assembly method of a soft package lithium ion battery. The method comprises the following steps of (1) laminating a positive electrode, a negative electrode and diaphragms which are obtained from production according to a sequence of the diaphragm, the negative electrode, the diaphragm, the positive electrode and the diaphragm, and then welding a tab to obtain a naked battery; (2) placing the naked battery and a reference electrode in a two-layer aluminum plastic membrane, and extruding the aluminum plastic membrane for 1 to 10 seconds with stress of 0.2 to 1MPa to make the aluminum plastic membrane bonded, wherein the aluminum plastic membrane is clamped between an upper metal head and a lower metal head at 130-250 DEG C; and (3) injecting an electrolyte into the battery, sealing the battery, pumping gas out of the battery, and then carrying out heat sealing so that no liquid is leaked from the battery. By the method, an extra device and an extra electrolyte are not needed, the reference battery is directly led out from the battery package during the battery assembly process and fixedly by heat sealing of the aluminum plastic membrane, and the method can be suitably used for any type of soft package lithium ion battery.
Description
Technical field
The present invention relates to technical field of lithium ion, be specifically related to a kind of flexible packing lithium ion battery three electrode assembling method.
Background technology
Lithium ion battery is the excellent characteristics such as energy density is high, output voltage is high, self-discharge rate is low, long service life, memory-less effect and environmental friendliness and be widely used in the mobile electronic terminal devices such as notebook computer, mobile phone, video camera, instrument and meter, electric tool because having.Its market share constantly expands, and progressively replaces NI-G (Ni-Cd) and metal nickel-Hydrogenized compound (Ni-MH) battery, occupies leading position.
There is the lithium ion battery of the types such as Soft Roll, box hat, aluminum hull in the market, wherein flexible packing lithium ion battery has the advantages such as security performance is good, lightweight, capacity is large, internal resistance is little, flexible design, not only be applied in consumer battery, be also widely used in the high-tech industries such as electric automobile (EV), energy storage, military project.
In lithium ion battery production process, need through preliminary filling and formation process, the battery charging of namely giving firm fluid injection complete, makes cell activation, and on pole piece, forms SEI film (solid electrolyte film), electrolyte and pole piece can be stoped to reflect further.And preliminary filling, the charging flow design that changes into need to know the change in voltage of the reference electrode that positive pole and negative pole are stable relative to separately, this will assemble a good three-electrode system.In addition, carrying out electro-chemical test to battery, during as multiplying power discharging, mean voltage can increase along with multiplying power and decline, and this is also necessary that assembling three-electrode system is to analyze positive and negative electrode degree of polarization separately, finds out the method for improving SNR.Chinese patent (publication number 102608539A) describes a kind of battery electrochemical method of testing and device, lithium battery to be placed in container and to draw battery positive and negative electrode, backward container in add electrolyte and also draw the reference electrode contacted with electrolyte, change in voltage when carrying out electric discharge in positive and negative electrode and reference electrode between any two.But this method and device are comparatively complicated, and difform battery needs the device of different size.
Summary of the invention
The object of the invention is the problem in order to overcome current flexible packing lithium ion battery three electrode assembling complexity, providing a kind of flexible packing lithium ion battery three electrode assembling method.The method is without the need to extra device and exotic electrolytes, and reference electrode is directly drawn in battery assembling process from battery packages, and is applicable to the flexible package lithium cell of any model.
In order to reach foregoing invention object, the present invention by the following technical solutions:
A kind of flexible packing lithium ion battery three electrode assembling method, specifically comprises the following steps:
(1) will produce the positive pole, negative pole and the barrier film that obtain, carry out lamination by the order of barrier film, negative pole, barrier film, positive pole, barrier film, then soldering polar ear, obtains plain battery; During lamination can both positive and negative polarity all in side, also can at offside;
(2) be put in two-layer aluminum plastic film by plain battery and reference electrode, aluminum plastic film is sandwiched in two metal end enclosures up and down of 130-250 DEG C, with the pressure extrusion 1-10 second of 0.2-1MPa, aluminum plastic film is bonded; Three sides of battery in heat-sealing, the side keeping battery waits until fluid injection; Reference electrode can be inserted in battery except any side needing one side of fluid injection, be preferably positioned over positive and negative lug centre position.
(3) battery is injected electrolyte, sealing, then pumps inside battery gas, then seals, make battery no leakage.
Preferably, described reference electrode is filamentary silver, spun gold or platinum filament.
Preferably, described reference electrode is filamentary silver.
Preferably, the diameter of reference electrode is 0.05-5mm.
Preferably, the diameter of reference electrode is 0.1-1mm.
The present invention compared with prior art, beneficial effect is: this method is simple to operate, step simplifies, the method is without the need to extra device and exotic electrolytes, reference electrode is directly drawn in battery assembling process from battery packages, sealed by aluminum plastic film fixing, be applicable to the flexible package lithium cell of any model.Flexible packing lithium ion battery three electrode assembly of the method assembling, can in lithium battery preliminary filling, formation process or when carrying out electrochemical property test, detect the change in voltage situation between lithium battery positive and negative electrode simultaneously, and reference electrode with between positive electrode and reference electrode with the situation of change of voltage between negative electrode, above change in voltage situation is compared, analyze, preliminary filling can be optimized on this basis, change into flow process, also can be used for optimizing battery design.
Embodiment
Below by specific embodiment, explanation is further described to technical scheme of the present invention.
If without specified otherwise, the raw material adopted in embodiments of the invention is the conventional raw material in this area, and the method adopted in embodiment, is the conventional method of this area.
Embodiment 1:
A kind of flexible packing lithium ion battery three electrode assembling method, specifically comprises the following steps:
(1) will produce the positive pole, negative pole and the barrier film that obtain, carry out lamination by the order of barrier film, negative pole, barrier film, positive pole, barrier film, then soldering polar ear, obtains plain battery; During lamination can both positive and negative polarity all in side, also can at offside;
(2) be put in two-layer aluminum plastic film by plain battery and reference electrode, aluminum plastic film is sandwiched in two metal end enclosures up and down of 130-250 DEG C, with the pressure extrusion 1-10 second of 0.2-1MPa, aluminum plastic film is bonded; Three sides of battery in heat-sealing, the side keeping battery waits until fluid injection; Reference electrode is filamentary silver, spun gold or platinum filament; The diameter of reference electrode is 0.05-5mm;
(3) battery is injected electrolyte, sealing, then pumps inside battery gas, then seals, make battery no leakage.
Embodiment 2:
A kind of flexible packing lithium ion battery three electrode assembling method, specifically comprises the following steps:
(1) will produce the positive pole, negative pole and the barrier film that obtain, carry out lamination by the order of barrier film, negative pole, barrier film, positive pole, barrier film, then soldering polar ear, obtains plain battery; During lamination can both positive and negative polarity all in side, also can at offside;
(2) be put in two-layer aluminum plastic film by plain battery and reference electrode, aluminum plastic film is sandwiched in two metal end enclosures up and down of 130-250 DEG C, with the pressure extrusion 1-10 second of 0.2-1MPa, aluminum plastic film is bonded; Three sides of battery in heat-sealing, the side keeping battery waits until fluid injection; Reference electrode is filamentary silver; The diameter of reference electrode is 0.1-1mmmm;
(3) battery is injected electrolyte, sealing, then pumps inside battery gas, then seals, make battery no leakage.
Claims (5)
1. a flexible packing lithium ion battery three electrode assembling method, is characterized in that, specifically comprise the following steps:
(1) will produce the positive pole, negative pole and the barrier film that obtain, carry out lamination by the order of barrier film, negative pole, barrier film, positive pole, barrier film, then soldering polar ear, obtains plain battery; During lamination can both positive and negative polarity all in side, also can at offside;
(2) be put in two-layer aluminum plastic film by plain battery and reference electrode, aluminum plastic film is sandwiched in two metal end enclosures up and down of 130-250 DEG C, with the pressure extrusion 1-10 second of 0.2-1MPa, aluminum plastic film is bonded; Three sides of battery in heat-sealing, the side keeping battery waits until fluid injection;
(3) battery is injected electrolyte, sealing, then pumps inside battery gas, then seals, make battery no leakage.
2. a kind of flexible packing lithium ion battery three electrode assembling method according to claim 1, it is characterized in that, described reference electrode is filamentary silver, spun gold or platinum filament.
3. a kind of flexible packing lithium ion battery three electrode assembling method according to claim 1, it is characterized in that, described reference electrode is filamentary silver.
4. a kind of flexible packing lithium ion battery three electrode assembling method according to claim 1, is characterized in that, the diameter of reference electrode is 0.05-5mm.
5. a kind of flexible packing lithium ion battery three electrode assembling method according to claim 1, is characterized in that, the diameter of reference electrode is 0.1-1mm.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107293778A (en) * | 2017-07-05 | 2017-10-24 | 力信（江苏）能源科技有限责任公司 | A kind of three-electrode battery and preparation method thereof |
| CN107799812A (en) * | 2016-08-31 | 2018-03-13 | 通用汽车环球科技运作有限责任公司 | Vehicular battery and monitoring system |
| CN108039514A (en) * | 2017-11-17 | 2018-05-15 | 清华大学 | A kind of electroplating preparation method of the lithium ion battery with reference electrode |
| CN108107092A (en) * | 2017-11-17 | 2018-06-01 | 清华大学 | A kind of infiltration preparation method of the lithium ion battery with reference electrode |
| CN108630980A (en) * | 2018-05-09 | 2018-10-09 | 合肥国轩高科动力能源有限公司 | A kind of three electrode soft-package battery of lithium ion and its test method |
| CN110618175A (en) * | 2019-10-09 | 2019-12-27 | 哈尔滨工业大学 | Electrochemical detection device and method for soluble polysulfide in metal/sulfur battery |
| CN111129432A (en) * | 2019-11-28 | 2020-05-08 | 浙江浙能技术研究院有限公司 | Novel reference electrode and three-electrode system for nondestructive testing of lithium ion battery industry and method |
| CN112054260A (en) * | 2020-08-26 | 2020-12-08 | 昆山宝创新能源科技有限公司 | Three-electrode battery |
| CN114284564A (en) * | 2021-12-06 | 2022-04-05 | 上海空间电源研究所 | Soft package battery with constant potential reference electrode and preparation method thereof |
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| CN200997429Y (en) * | 2006-12-18 | 2007-12-26 | 上海比亚迪有限公司 | Triple-electrode battery |
| CN101880901A (en) * | 2010-02-03 | 2010-11-10 | 哈尔滨工业大学 | Preparation method of silicon-germanium alloy film material |
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| CN107799812B (en) * | 2016-08-31 | 2020-12-08 | 通用汽车环球科技运作有限责任公司 | Vehicle battery and monitoring system |
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| CN107293778A (en) * | 2017-07-05 | 2017-10-24 | 力信（江苏）能源科技有限责任公司 | A kind of three-electrode battery and preparation method thereof |
| CN108039514A (en) * | 2017-11-17 | 2018-05-15 | 清华大学 | A kind of electroplating preparation method of the lithium ion battery with reference electrode |
| CN108107092A (en) * | 2017-11-17 | 2018-06-01 | 清华大学 | A kind of infiltration preparation method of the lithium ion battery with reference electrode |
| CN108107092B (en) * | 2017-11-17 | 2019-09-27 | 清华大学 | A kind of infiltration preparation method of the lithium ion battery with reference electrode |
| CN108630980A (en) * | 2018-05-09 | 2018-10-09 | 合肥国轩高科动力能源有限公司 | A kind of three electrode soft-package battery of lithium ion and its test method |
| CN110618175A (en) * | 2019-10-09 | 2019-12-27 | 哈尔滨工业大学 | Electrochemical detection device and method for soluble polysulfide in metal/sulfur battery |
| CN111129432A (en) * | 2019-11-28 | 2020-05-08 | 浙江浙能技术研究院有限公司 | Novel reference electrode and three-electrode system for nondestructive testing of lithium ion battery industry and method |
| CN112054260A (en) * | 2020-08-26 | 2020-12-08 | 昆山宝创新能源科技有限公司 | Three-electrode battery |
| CN114284564A (en) * | 2021-12-06 | 2022-04-05 | 上海空间电源研究所 | Soft package battery with constant potential reference electrode and preparation method thereof |
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Address after: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang District, No. two road, building No. 855, No. Applicant after: Wanxiang 123 Co Ltd Applicant after: Wanxiang Group Corporation Address before: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang, No. two road, building No. 118, No. Applicant before: Universal A 1 System Co., Ltd Applicant before: Wanxiang Group Corporation |
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