CN105789537A - External ceramic layer component of positive and negative electrode rolls of lithium ion battery and application method of external ceramic layer component - Google Patents
External ceramic layer component of positive and negative electrode rolls of lithium ion battery and application method of external ceramic layer component Download PDFInfo
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- CN105789537A CN105789537A CN201610186017.XA CN201610186017A CN105789537A CN 105789537 A CN105789537 A CN 105789537A CN 201610186017 A CN201610186017 A CN 201610186017A CN 105789537 A CN105789537 A CN 105789537A
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- Prior art keywords
- positive
- negative electrode
- ceramic layer
- lithium ion
- ion battery
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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
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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
- H01M10/052—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
- H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
- H01M50/461—Separators, membranes or diaphragms characterised by their combination with electrodes with adhesive layers between electrodes and separators
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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
Abstract
The invention discloses an external ceramic layer component of positive and negative electrode rolls of a lithium ion battery. The external ceramic layer component is prepared into slurry by metering and mixing the following raw materials in percentage by mass: 3.0 to 5.0 percent of PVP (Polyvinyl Pyrrolidone), 45 to 85 percent of H2O, 10 to 40 percent of Al2O3, 1.0 to 5.0 percent of SiO2 and 1.0 to 5.0 percent of ZrO. The invention also discloses an application method of the external ceramic of the positive and negative electrode rolls of the lithium ion battery. The application method comprises the following specific process steps of firstly, gluing single surfaces of current collectors of the positive and negative electrode rolls; secondly, feeding the glued positive and negative electrode rolls into a drying oven for drying; thirdly, coating a cured glue layer with the ceramic slurry; fourthly, feeding the positive and negative electrode rolls coated with the ceramic slurry into the drying oven for drying; fifthly, respectively unfolding the positive and negative electrode rolls of the external ceramic layer, and punching into positive and negative electrode slices according to matching dimensions. According to the lithium ion battery prepared by the external ceramic layer component disclosed by the invention, no diaphragm between electrode roll laminating layers is needed; due to the adoption of the structure, laminating structures of the battery electrode rolls can be simplified, and the working efficiency of battery assembly can be remarkably improved; more important of all, potential safety hazards are eliminated on the structure.
Description
Technical field
The invention belongs to metal component surface coating technology field, in particular it relates to external ceramic layer component is rolled up in a kind of lithium ion battery plus-negative plate pole, the invention further relates to lithium ion battery plus-negative plate pole and roll up external ceramic layer application process.
Background technology
Conventional lithium ion battery is mainly made up of positive pole pole volume, negative pole pole volume, barrier film, electrolyte and shell.In structure, the barrier film of isolation material mainly has the effect of two aspects between positive pole pole volume and negative pole pole volume, and one is make layer insulation, and two ions being easy for allowing electrolyte precipitate out pass through.The industry makes barrier film and generally uses polyolefine material, and these plastics have certain mechanical strength and good insulating properties, is entirely capable of meeting the supporting requirement of lithium ion battery run under normality.There is accident in the lithium ion battery used in reality, for instance internal short-circuit, outside overcharge or short circuit, and these accidents all produce high temperature.Because polyolefine material thermal contraction is big, fusing point is relatively low, the PE material melting temperature of most common of which only 130～140 DEG C, PP material melting temperature is 130 DEG C.Once lithium ion battery constitutes inside thermal runaway because of fault, what first damage is polyolefin material barrier film, and the barrier film crossing heating ablation easily causes the positive pole pole cigarette tactile negative pole pole volume of stacking and is short-circuited, and occurs this kind of accident to be likely to cause naked light, even sets off an explosion.The industry is in order to overcome the problem of plastics matter barrier film poor heat stability, and many manufacturers carry out special item targetedly, and most representational technical scheme is at membrane surface coated ceramic layer at present.One of insulating properties excellent materials that pottery is well recognized as, can be greatly improved layer insulation grade at membrane surface coated ceramic layer.But, the program remains without the problem fundamentally solving barrier film base material hot property difference and the problem of barrier film and ceramic coated layer heat-shrinkable gap great disparity, and prior art is not still the preferred plan solving lithium ion battery safety thus.
Summary of the invention
Present invention is generally directed to the problem that both positive and negative polarity pole piece interlayer insulation safety difference made by prior art barrier film, propose a kind of at both positive and negative polarity pole volume collector one side external ceramic layer respectively, and in this, as the technical scheme of layer insulation, this technical scheme is because having abandoned traditional barrier film, optimize pole volume layer stack structure further, both accomplish Heat stability is good, improve again layer insulation grade.
The present invention is achieved through the following technical solutions technical goal.
External ceramic layer component is rolled up in lithium ion battery plus-negative plate pole, and it thes improvement is that component by the metering of following mass percent and blended is configured to slurry:
PVP3.0%～5.0%
H2O45%～85%
AL2O310%～40%
SiO21.0%～5.0%
ZrO21.0%～5.0%.
Present invention additionally comprises lithium ion battery plus-negative plate pole and roll up the application process of external ceramic layer, it is characterised in that concrete technology step is as follows:
1. first after roll-in positive and negative electrode pole volume collector one side coating one layer of PVDF glue；
2. then the positive and negative electrode pole of gluing is rolled up and send into oven for drying, in temperature 60 C～120 DEG C, dry 2min～8min, form the glue-line of thick 1.0～5.0 μm；
3. coated ceramic slurry on cured glue-line；
4. the positive and negative electrode pole of coated ceramic slurry is rolled up and send into oven for drying, at 80 DEG C～140 DEG C drying in oven 2min～8min, form thick 15～50 μm of ceramic layers；
5. respectively the positive and negative electrode pole of external ceramic layer is rolled up and launch, be die-cut into positive and negative electrode pole piece by package size.
Coated ceramic slurry in above-mentioned processing step adopts spraying coating process.
The present invention compared with prior art, has the positive effect that:
1, the positive and negative electrode pole volume base material of lithium ion battery is metal forming, and ceramic layer external on metal foil passes through glue-line medium, and adhesive force is strong, uses reliable；
2, roll up the external ceramic layer of collector one side in lithium ion battery positive and negative electrode pole, give full play to the insulation characterisitic of pottery, be greatly promoted the class of insulation between the volume layer of positive and negative electrode pole；
3, lithium ion battery positive and negative electrode pole is rolled up metallic foil substrates and external ceramic layer are solids, in combination with Heat stability is good, polyolefin melting temperature used by comparable prior art is at least high 30 DEG C, because energy density is high, is remarkably improved the safety in utilization of supporting battery；
4, roll up collector one side because of lithium ion battery positive and negative electrode pole and distinguish the ceramic layer of external insulation, such alternative structure can be rolled up between overlapping layers without barrier film in pole, this structure can simplify battery pole coil stepped construction, battery can be significantly improved again and assemble work efficiency, it is most important that eliminate safe hidden trouble structure.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.
For 10Ah cobalt acid lithium ion battery, component used is measured by mass percentage and blended is configured to four example ceramic sizes, and concrete proportioning is shown in following table one:
Table one or four example ceramic size component proportion table
By the ceramic size that upper table is made, concrete application process is as follows:
1. the first step, the positive and negative electrode pole volume collector one side one layer of PVDF glue of coating after roll-in；
2. then the positive and negative electrode pole of gluing is rolled up and send into oven for drying；
3. coated ceramic slurry on cured glue-line, the present embodiment coated ceramic slurry adopts spraying coating process；
4. the positive and negative electrode pole of coated ceramic slurry is rolled up and send into oven for drying；
5. respectively the positive and negative electrode pole of external ceramic layer is rolled up and launch, be die-cut into positive and negative electrode pole piece by package size.
The concrete technology parameter implementing said method is shown in following table two:
Table two process parameter table
In order to verify the application technology effect of the present invention, the positive and negative electrode pole made being rolled up direct lamination and becomes battery core, battery core, after 150 DEG C of hot pressing, is toasted 12h in 130 DEG C and is dewatered processs as routine, be then packaged fluid injection and be melted into resultant battery.
Take the positive and negative electrode pole piece made by the present invention, assembling specification is that 10Ah cobalt acid lithium ion battery does test specimens, contrast sample is existing goods specification is 10Ah cobalt acid lithium ion battery, does security test under equal test condition, and concrete test result is shown in following table three:
Table three battery security test result table
Test result shows, utilizes the lithium ion battery that the present invention makes, and surveyed security performance all meets design requirement, and reaches expection technique effect, solves lithium ion battery safety problem.And contrasting sample, to only have overdischarge index identical with the design objective of the present invention, all the other 5 indexs all do not reach expection requirement, and product uses exists potential safety hazard.
Claims (3)
1. external ceramic layer component is rolled up in a lithium ion battery plus-negative plate pole, it is characterised in that component is by the metering of following mass percent and blended is configured to slurry:
PVP3.0%～5.0%
H2O45%～85%
AL2O310%～40%
SiO21.0%～5.0%
ZrO21.0%～5.0%.
2. the application process implemented described in claim 1, it is characterised in that concrete technology step is as follows:
1. first after roll-in positive and negative electrode pole volume collector one side coating one layer of PVDF glue；
2. then the positive and negative electrode pole of gluing is rolled up and send into oven for drying, in temperature 60 C～120 DEG C, dry 2min～8min, form the glue-line of thick 1.0～5.0 μm；
3. coated ceramic slurry on cured glue-line；
4. the positive and negative electrode pole of coated ceramic slurry is rolled up and send into oven for drying, at 80 DEG C～140 DEG C drying in oven 2min～8min, form thick 15～50 μm of ceramic layers；
5. respectively the positive and negative electrode pole of external ceramic layer is rolled up and launch, be die-cut into positive and negative electrode pole piece by package size.
3. the application process of external ceramic layer component is rolled up in lithium ion battery plus-negative plate pole according to claim 2, it is characterised in that: described coated ceramic slurry adopts spraying coating process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610186017.XA CN105789537A (en) | 2016-03-25 | 2016-03-25 | External ceramic layer component of positive and negative electrode rolls of lithium ion battery and application method of external ceramic layer component |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610186017.XA CN105789537A (en) | 2016-03-25 | 2016-03-25 | External ceramic layer component of positive and negative electrode rolls of lithium ion battery and application method of external ceramic layer component |
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| CN105789537A true CN105789537A (en) | 2016-07-20 |
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| CN201610186017.XA Pending CN105789537A (en) | 2016-03-25 | 2016-03-25 | External ceramic layer component of positive and negative electrode rolls of lithium ion battery and application method of external ceramic layer component |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174685A (en) * | 2007-10-26 | 2008-05-07 | 中南大学 | Anode or cathode pole piece of lithium ion battery and coating method thereof |
| CN101499523A (en) * | 2008-01-11 | 2009-08-05 | 三星Sdi株式会社 | Electrode assembly and secondary battery having the same |
| CN102222787A (en) * | 2010-04-15 | 2011-10-19 | 深圳市比克电池有限公司 | Lithium ion battery electrode plate, battery and method for improving battery security |
| CN104362289A (en) * | 2014-09-26 | 2015-02-18 | 珠海市讯达科技有限公司 | Lithium ion battery pole piece provided with inorganic isolating layers, battery comprising the pole piece and preparation method for pole piece |
-
2016
- 2016-03-25 CN CN201610186017.XA patent/CN105789537A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174685A (en) * | 2007-10-26 | 2008-05-07 | 中南大学 | Anode or cathode pole piece of lithium ion battery and coating method thereof |
| CN101499523A (en) * | 2008-01-11 | 2009-08-05 | 三星Sdi株式会社 | Electrode assembly and secondary battery having the same |
| CN102222787A (en) * | 2010-04-15 | 2011-10-19 | 深圳市比克电池有限公司 | Lithium ion battery electrode plate, battery and method for improving battery security |
| CN104362289A (en) * | 2014-09-26 | 2015-02-18 | 珠海市讯达科技有限公司 | Lithium ion battery pole piece provided with inorganic isolating layers, battery comprising the pole piece and preparation method for pole piece |
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Address after: Double park Dengke Liang Xu town Jiangyan District Jiangsu city of Taizhou province No. 1 225526 Applicant after: Jiangsu Shuangdeng frontan new energy Co. Ltd. Applicant after: Shoto Group Co., Ltd. Address before: Jiangyan District of Jiangsu city in Taizhou province 225526 Liang Xu two Dengke Park No. 1 Applicant before: Jiangsu Front New Energy Co., Ltd. Applicant before: Shoto Group Co., Ltd. |
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Application publication date: 20160720 |