CN102760849A - Lithium battery - Google Patents
Lithium battery Download PDFInfo
- Publication number
- CN102760849A CN102760849A CN2011101084566A CN201110108456A CN102760849A CN 102760849 A CN102760849 A CN 102760849A CN 2011101084566 A CN2011101084566 A CN 2011101084566A CN 201110108456 A CN201110108456 A CN 201110108456A CN 102760849 A CN102760849 A CN 102760849A
- Authority
- CN
- China
- Prior art keywords
- negative plate
- barrier layer
- plate
- lithium battery
- positive plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a lithium battery that comprises a packaging structure, a positive plate, a negative plate, a barrier layer, an isolation film, and electrolyte solution. The positive plate, the negative plate, the barrier layer, the isolation film, and the electrolyte solution are wrapped in the packaging structure, and the isolation film is sandwiched between the positive plate and the negative plate, and bonded with the positive plate and the negative plate. The barrier layer is coated on the positive plate, the negative plate, or the isolation film to ensure that the barrier layer is located between the positive plate and the negative plate. Therefore, the barrier layer can prevent lithium dendrites on the negative plate from being contacted with the positive plate when the lithium battery is in an overcharge state, the short circuit can be avoided, and the safety of usage is ensured.
Description
Technical field
The relevant a kind of lithium battery of the present invention refers to a kind ofly prevent that lithium dendrite arm on the negative plate from contacting with positive plate and cause short circuit phenomenon, to guarantee lithium battery safe in utilization especially.
Background technology
Be depicted as known laminated type lithium battery a like the 4th, 5 figure, the assembly that it disclosed mainly comprises a positive plate a1, a negative plate a2 and is folded in the barrier film a3 between the positive and negative plate (a1, a2).This barrier film a3 is in order to isolate positive and negative plate (a1, a2) and to make positive and negative plate (a1, a2) fluid-tight engagement become a battery cell a4.And according to required battery capacity, an amount of battery cell a4 welded positive and negative lug (a5, a6) after, insert among the aluminium foil bag a7, dewater through vacuumize again, inject electrolyte solution, to form a lithium battery.
Wherein, lithium ion via negative plate a1 to the oxidation reaction of positive plate a2 producing discharge process, and by the reduction reaction of charging effect so that lithium ion flows to negative plate a1 by positive plate a2.But; When overcharging state, can be transformed into the lithium dendrite arm because of the reduction reaction effect owing to be penetrated into the lithium ion of negative plate a1, and when the lithium dendrite arm builds up and pierce through barrier film a3; Promptly can let negative plate a1 contact and short circuit, produce danger on fire, blast with positive plate a2.
In view of this, in order to improve above-mentioned shortcoming, make lithium battery can effectively improve the fail safe of use, long-pending experience and the constantly research and development improvement for many years of inventor has generation of the present invention then.
Summary of the invention
Main purpose of the present invention provide a kind of between positive plate and negative plate, be provided with one have aluminium oxide (AL2O3) barrier layer, contact with positive plate with the lithium dendrite arm that prevents to be accumulated on the negative plate, cause short circuit phenomenon, to guarantee lithium battery safe in utilization.
For reaching the purpose of foregoing invention, the set lithium battery of the present invention is with encapsulating structure clad anode sheet, negative plate, barrier film and electrolyte solution, and barrier film is folded between positive plate and the negative plate, and binds with positive and negative plate respectively; Its major technology characteristics are: one have aluminium oxide (AL2O3) barrier layer be coated between positive plate and the negative plate.
During enforcement, this barrier layer is coated between positive plate and the barrier film.
During enforcement, this barrier layer also can be coated between barrier film and the negative plate.
During enforcement, this barrier layer is after aluminium oxide, adhesive agent and solvent are thickener, to be coated between positive plate and the negative plate, and after solvent evaporates, forms.
During enforcement, the aluminium oxide of this barrier layer accounts for 85 to 98 weight portions, and this adhesive agent accounts for 2 to 15 weight portions.
For ease of more deep understanding being arranged, after being specified in now to the present invention.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the assembly exploded view of positive plate, negative plate, barrier layer and the barrier film of the present invention's one preferred embodiment;
Fig. 2 is the combination generalized section of the present invention's one preferred embodiment;
Combination generalized section when Fig. 3 is coated on the upper surface of lower surface or barrier film of positive plate for the barrier layer of the present invention's one preferred embodiment;
Fig. 4 is the three-dimensional appearance sketch map of the battery cell of laminated type lithium battery in the prior art;
Fig. 5 is the three-dimensional appearance sketch map of laminated type lithium battery in the prior art.
[primary clustering symbol description] lithium battery 1; Encapsulating structure 2; Positive plate 3; Lower surface 31,62; Negative plate 4; Upper surface 41,61; Barrier layer 5; Barrier film 6; Electrolyte solution 7; Laminated type lithium battery a; Positive plate a1; Negative plate a2; Barrier film a3; Battery cell a4; Positive and negative lug a5, a6; Aluminium foil bag a7.
Embodiment
See also Fig. 1, shown in 2; It is for a preferred embodiment of lithium battery 1 of the present invention; Comprise an encapsulating structure 2, a positive plate 3, a negative plate 4, a barrier layer 5, a barrier film 6 and an electrolyte solution 7; Wherein, this barrier film 6 and barrier layer 5 are folded between positive plate 3 and the negative plate 4, and encapsulating structure 2 clad anode sheets 3, negative plate 4, barrier layer 5, barrier film 6 and electrolyte solution 7 are in wherein.
During enforcement; This positive plate 3 is lithium metal mixing oxide (lithium mixed metal oxide), also can be LiMnO2, LiMn2O4, LiCoO2, Li2Cr2O7, Li2CrO4, LiNiO2, LiFeO2, LiNixCo1-xO2, LiFePO4, LiMn0.5Ni0.5O2, LiMn1/3Co1/3Ni1/3O2, LiMc0.5Mn1.5O4 or above-mentioned combination; This negative plate 4 forms after by commercial Si powder ball milling, and at silicon materials coated with carbon film; This barrier film 6 is an insulating material, can be the sandwich construction of polyethylene (PE), polypropylene (PP) or above-mentioned material.And the Main Ingredients and Appearance of electrolyte solution 7 is organic solvent, lithium salts and additive.Organic solvent can be γ-butyl lactone (γ-butyrolactone; GBL), ethylene carbonate (ethylene carbonate, EC), propene carbonate (propylene carbonate, PC), diethyl carbonate (diethyl carbonate; DEC), propyl acetate (propyl acetate; PA), dimethyl carbonate (dimethyl carbonate, DMC), methyl ethyl carbonate (ethylmethyl carbonate, EMC) or above-mentioned combination.Lithium salts can be LiPF6, LiBF4, LiAsF6, LiSbF6, LiClO4, LiAlCl4, LiGaCl4, LiNO3, LiC (SO2CF3) 3, LiN (SO2CF3) 2, LiSCN, LiO3SCF2CF3, LiC6F5SO3, LiO2CCF3, LiSO3F, LiB (C6H5) 4, LiCF3SO3 or above-mentioned combination.
And major technique characteristics of the present invention are, this barrier layer 5 with aluminium oxide (AL2O3) is coated between positive plate 3 and the negative plate 4.These barrier layer 5 preferable thickness are in 5 microns, and this barrier layer 5 is coated on the upper surface 41 of negative plate 4.
During enforcement, this barrier layer 5 also can directly be coated on the lower surface 62 of barrier film 6, so that barrier layer 5 is between negative plate 4 and barrier film 6; Or shown in the 3rd figure, barrier layer 5 is coated on the lower surface 31 or the upper surface 61 of barrier film 6 of positive plate 3, so that barrier layer 5 is between positive plate 3 and barrier film 6.
And this barrier layer 5 is after aluminium oxide, adhesive agent and solvent are thickener, are coated between positive plate 3 and the negative plate 4, and after solvent evaporates, form.The detailed coating process of this barrier layer 5 is: after getting the adhesive agent and solvent stirring of the nanoscale powdery aluminum of about 85 to 98 weight portions, about 2 to 15 weight portions; Being made into viscosity is the thickener about 800-1500; Then thickener is uniformly coated on negative plate 4 top layers of having made; With behind the hyperthermia drying, let aluminium oxide and adhesive agent stick together on negative plate 4 again.
Wherein, This adhesive agent is preferably and gathers difluoroethylene (polyvinylidene fluoride; PVDF), this solvent is a N-methyl pyrrolidone (NMP), during enforcement; This adhesive agent also can be styrene butadiene ribber (styrene-butadiene rubber, SBR), polyamide (polyamide), melmac (melamineresin) or above-mentioned composition.
By this, although at the over-charging of battery state, and make when the lithium ion of infiltration between carbon-coating is transformed into the lithium dendrite arm; Because barrier layer 5 intercepts between positive plate 3 and negative plate 4; Can prevent that the lithium dendrite arm from piercing through barrier film 6, or after piercing through barrier film 6, avoid letting positive plate 3 contact and cause the battery short circuit phenomenon with negative plate 4; Thereby avoid causing on fire or blast, to improve the fail safe of lithium battery.
Therefore, the present invention has following advantage:
When 1, barrier layer of the present invention was coated between positive plate and the negative plate, the lithium dendrite arm that can prevent to be accumulated on the negative plate contacted with positive plate, therefore, can effectively avoid causing short circuit phenomenon, to improve the fail safe that lithium battery uses.
2, barrier layer of the present invention has good insulation performance property, corrosion resistance and oxidation resistance, therefore, in the time of in being immersed in electrolyte solution, except can effectively improving the fail safe of lithium battery, also can let the quality of lithium battery keep stable.
In sum, according to the content that preceding text disclosed, the present invention really can reach the intended purposes of invention, and a kind of lithium battery that can effectively improve safety in utilization and stability is provided, and has the value of utilizing on the industry, and the whence proposes application for a patent for invention in accordance with the law.
Claims (6)
1. lithium battery, with encapsulating structure clad anode sheet, negative plate, barrier film and electrolyte solution, and this barrier film is folded between positive plate and the negative plate, and binds with positive and negative plate respectively; It is characterized in that:
One have aluminium oxide barrier layer be coated between positive plate and the negative plate.
2. lithium battery as claimed in claim 1, wherein, this barrier layer is coated between positive plate and the barrier film.
3. lithium battery as claimed in claim 1, wherein, this barrier layer is coated between barrier film and the negative plate.
4. lithium battery as claimed in claim 1, wherein, this barrier layer be aluminium oxide, adhesive agent with solvent mix each other be thickener after, be coated between positive plate and the negative plate, and after solvent evaporates, form.
5. lithium battery as claimed in claim 4, wherein, the aluminium oxide of this barrier layer accounts for 85 to 98 weight portions, and this adhesive agent accounts for 2 to 15 weight portions.
6. lithium battery as claimed in claim 4, wherein, this adhesive agent is to gather difluoroethylene, styrene butadiene ribber, polyamide, melmac or above-mentioned composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101084566A CN102760849A (en) | 2011-04-28 | 2011-04-28 | Lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101084566A CN102760849A (en) | 2011-04-28 | 2011-04-28 | Lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102760849A true CN102760849A (en) | 2012-10-31 |
Family
ID=47055229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101084566A Pending CN102760849A (en) | 2011-04-28 | 2011-04-28 | Lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102760849A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106920919A (en) * | 2017-01-23 | 2017-07-04 | 浙江钱江锂电科技有限公司 | A kind of stacked soft-package battery |
| CN108807810A (en) * | 2017-05-05 | 2018-11-13 | 迪吉亚节能科技股份有限公司 | Solid union lithium cell core pole piece and the lithium cell core for using the pole piece |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5194341A (en) * | 1991-12-03 | 1993-03-16 | Bell Communications Research, Inc. | Silica electrolyte element for secondary lithium battery |
| CN1314008A (en) * | 1999-04-08 | 2001-09-19 | 大日本印刷株式会社 | meterial for packaging cell, bag for packaging cell, and its production method |
| CN1511351A (en) * | 2001-05-23 | 2004-07-07 | 分子技术股份有限公司 | Lithium anodes for electrochemical cells |
| US20060222933A1 (en) * | 2005-04-04 | 2006-10-05 | Matsushita Electric Industrial Co., Ltd. | Cylindrical lithium secondary battery |
| CN1917270A (en) * | 2006-09-01 | 2007-02-21 | 天津力神电池股份有限公司 | Method for increasing safe performance of square lithium ion secondary battery |
| CN101471432A (en) * | 2007-12-27 | 2009-07-01 | 比亚迪股份有限公司 | Diaphragm and preparation method thereof as well as lithium ion battery |
-
2011
- 2011-04-28 CN CN2011101084566A patent/CN102760849A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5194341A (en) * | 1991-12-03 | 1993-03-16 | Bell Communications Research, Inc. | Silica electrolyte element for secondary lithium battery |
| CN1314008A (en) * | 1999-04-08 | 2001-09-19 | 大日本印刷株式会社 | meterial for packaging cell, bag for packaging cell, and its production method |
| CN1511351A (en) * | 2001-05-23 | 2004-07-07 | 分子技术股份有限公司 | Lithium anodes for electrochemical cells |
| US20060222933A1 (en) * | 2005-04-04 | 2006-10-05 | Matsushita Electric Industrial Co., Ltd. | Cylindrical lithium secondary battery |
| CN1917270A (en) * | 2006-09-01 | 2007-02-21 | 天津力神电池股份有限公司 | Method for increasing safe performance of square lithium ion secondary battery |
| CN101471432A (en) * | 2007-12-27 | 2009-07-01 | 比亚迪股份有限公司 | Diaphragm and preparation method thereof as well as lithium ion battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106920919A (en) * | 2017-01-23 | 2017-07-04 | 浙江钱江锂电科技有限公司 | A kind of stacked soft-package battery |
| CN108807810A (en) * | 2017-05-05 | 2018-11-13 | 迪吉亚节能科技股份有限公司 | Solid union lithium cell core pole piece and the lithium cell core for using the pole piece |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103311500B (en) | A kind of lithium ion battery negative electrode and manufacture method | |
| CN103730683B (en) | A kind of lithium battery and preparation method thereof | |
| CN106384808A (en) | Lithium ion battery positive electrode sheet, preparation method of lithium ion battery positive electrode sheet, and lithium ion battery | |
| CN103078105B (en) | Lithium ion battery, positive active material thereof and preparation method of positive active material | |
| JP7144403B2 (en) | Battery electrodes and lithium ion secondary batteries | |
| CN105514350A (en) | Lithium ion battery | |
| TWI486309B (en) | A lithium battery having an electrolyte solution containing an ionic liquid | |
| US10756386B2 (en) | Lithium ion battery and method for preparing the same | |
| JP7166265B2 (en) | Electrodes, non-aqueous electrolyte batteries and battery packs | |
| CN110268557A (en) | Use the prelithiation of lithium metal and inorganic composite layers | |
| TW200926479A (en) | Electrolytic solution and lithium battery employing the same | |
| CN101740809A (en) | Large-capacity power lithium battery and preparation method thereof | |
| CN104659407B (en) | Lithium-sulfur battery and preparation method thereof | |
| US20220376265A1 (en) | Positive electrode plate and lithium-ion battery | |
| CN103117411A (en) | Lithium ion battery and production method thereof | |
| CN102361095A (en) | Lithium ion battery with high specific power and preparation method for same | |
| US20170338456A1 (en) | Lithium Ion Secondary Battery | |
| CN104466231A (en) | Lithium-ion secondary battery and preparation method of lithium-ion secondary battery | |
| KR101684200B1 (en) | Lithium secondary battery | |
| JP2014135154A (en) | Nonaqueous electrolyte secondary battery | |
| CN113328099A (en) | Negative pole piece and secondary battery | |
| CN105470559B (en) | A kind of lithium ion battery of high-energy density | |
| WO2023213188A1 (en) | Electrochemical device | |
| CN114824165B (en) | Negative electrode plate, electrochemical device and electronic equipment | |
| CN202434660U (en) | Pole core of lithium ion battery and lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121031 |