CN104810556A - Soft package battery structure - Google Patents
Soft package battery structure Download PDFInfo
- Publication number
- CN104810556A CN104810556A CN201410441197.2A CN201410441197A CN104810556A CN 104810556 A CN104810556 A CN 104810556A CN 201410441197 A CN201410441197 A CN 201410441197A CN 104810556 A CN104810556 A CN 104810556A
- Authority
- CN
- China
- Prior art keywords
- battery
- battery core
- hardboard
- battery cell
- insulation
- 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.)
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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
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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
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention belongs to the technical field of a battery and especially relates to a soft package battery structure. The soft package battery structure comprises a battery cell formed by arranging a positive plate, a diaphragm and a negative plate in a staggered pattern or a battery cell manufactured in a winding mode. The battery cell is coated with an aluminum-plastic film. A tabulate insulated hard board is arranged on the external surface of the battery cell. The insulated hard board is positioned between the aluminum-plastic film and the battery cell. The insulated hard board applies pressure on the battery cell to keep tightness of the positive and negative plates so as to improve performance of the battery. According to the invention, the battery cell is clamped tightly through the insulated hard board to keep tightness between the plates so as to enhance performance of the battery. In addition, the insulated hard board has many small holes which will not influence soakage effect of a battery electrolyte.
Description
Technical field
The invention belongs to cell art, particularly a kind of flexible packaged battery pool structure.
Background technology
The structure of general lithium ion power soft-package battery is: with laminar, and by positive plate, barrier film, negative plate are alternate and the battery core (or making battery core with coiling form) that formed, then connect outside terminal, put into aluminum plastic film, inject electrolyte.
The shell that soft-package battery is suitable for is softwood matter, the demand of current driving force battery is more and more harsher, particularly to high rate performance, the requirement of power-performance and cycle performance is more and more higher, in order to ensure long circulation life (such as 1C 2000 ~ 3000 circulates), sufficient electrolyte content is necessary, but contrary electrolyte content is more, interfacial gap between pole piece can be larger, the compactness of anode pole piece and cathode pole piece is very large to the performance impact of battery, the charge and discharge process of battery be lithium ion between both positive and negative polarity along the process that electrolyte shifts back and forth, gap between pole piece equals greatly the far away and lithium ion percent of pass of distance that lithium ion passes through and declines, this can cause the cycle life of battery, multiplying power property, power characteristic has impact, even can cause analysing lithium problem, and single bag battery outward appearance also can be affected.
Summary of the invention
The invention provides a kind of cycle performance, the flexible packaged battery pool structure that prevents from occurring in battery core cyclic process drum limit problem that can improve battery by a relatively large margin.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of flexible packaged battery pool structure, comprise positive plate, barrier film, negative plate are alternate and the battery core that formed or the battery core made with coiling form, metallized aluminum plastic film outside battery core, the outer surface of described battery core arranges in flat insulation hardboard, and insulation hardboard is between aluminum plastic film and battery core.Insulation hardboard applies pressure to battery core, makes positive/negative plate keep compactness, thus improves battery performance.
As preferably, the number of insulation hardboard is 2, is close to the tow sides of battery core respectively.
As preferably, the thickness of insulation hardboard is 0.05mm ~ 3mm.Thickness and the hardness of insulation hardboard are directly proportional, the thicker hardness of thickness can improve naturally, want have the certain hardness of sufficient pressure to be indispensable to battery core, but the blocked up design of design meeting to whole battery, especially the thickness of battery has impact, and the thickness of battery has direct relation with the energy density per unit volume metric density of battery again.So suitable Thickness Design and important.
As preferably, the edge of insulation hardboard is slightly shorter than the edge of battery core, and the edge of negative plate is slightly longer than at the edge of insulation hardboard, i.e. lamination in flexible-packed battery after pack, the edge of the hardboard that insulate is between battery core and negative plate just.Insulation hardboard size just has to increase aluminum plastic film punching hole size as exceeded battery core surface, and this can cause the dead band of battery to increase, and affects the design size of whole battery.If but insulation hardboard size be less than cathode pole piece just can not fully to all pole piece region applying pressure, the fringe region do not covered has the risk analysing lithium.General anode pole piece design size is more than or equal to 1mm than diaphragm size, so insulation hardboard size can be designed to be less than battery core size 1mm.Namely the length of hardboard of insulating and wide size are than the length of battery core and wide each little 1mm.
As preferably, insulation hardboard is distributed with several holes.Further preferably, this some holes is evenly distributed on insulation hardboard.Electrolyte infiltrates pole piece from all directions, if but increase insulation hardboard, and pressure is applied to battery core, the infiltration on the positive and negative surface of battery core can be affected, so uniform hole can allow electrolyte fully and the positive and negative surface contact of battery core on insulation hardboard, solution infiltration problem.
The invention has the beneficial effects as follows: the present invention, by being suitable for insulation hardboard clamping battery core, keeping the compactness between pole piece, improves battery performance, and there is most aperture in hardboard face of insulating, can not affect battery electrolyte effect of impregnation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention, and wherein, 1 is insulation hardboard, and 2 is battery core, and 3 is adhesive tape;
Fig. 2 is that the present invention is insulated the structural representation of hardboard, and wherein, 1 is insulation hardboard, and 4 is hole;
Fig. 3 is the loop-around data result figure that the embodiment of the present invention 1 obtains battery;
Fig. 4 is the outside drawing that the embodiment of the present invention 1 obtains battery, and wherein a is the battery that the present invention obtains, and b is the battery not adding insulation hardboard;
Fig. 5 is the vertical view that the embodiment of the present invention 1 obtains battery, and wherein a is the battery that the present invention obtains, and b is the battery not adding insulation hardboard.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.Should be appreciated that enforcement of the present invention is not limited to the following examples, any pro forma accommodation make the present invention and/or change all will fall into scope.
In the present invention, if not refer in particular to, all parts, percentage are unit of weight, and the equipment adopted and raw material etc. all can be buied from market or this area is conventional.Method in following embodiment, if no special instructions, is the conventional method of this area.
Embodiment 1:
A kind of flexible packaged battery pool structure as shown in Figure 1, comprise positive plate, barrier film, negative plate are alternate and the battery core that formed or the battery core made with coiling form, metallized aluminum plastic film outside battery core 2, the outer surface of described battery core arranges in flat insulation hardboard 1, and insulation hardboard is between aluminum plastic film and battery core.The number of insulation hardboard 1 is 2, adopts adhesive tape 3 that 2 insulation hardboards 1 are individually fixed in the tow sides of battery core, makes insulation hardboard clamp battery core.Insulation hardboard 1 is evenly distributed with multiple hole 4, sees Fig. 2.
Prepare anode pole piece: the LiFePO4 (LFP) mixing 90 weight portions, the conductive black SP of 4 weight portions, the carbon nano-tube (VGCF) of 1 weight portion, and 5 Kynoar (PVDF) of weight portion, and the N-N-dimethyl pyrrolidone adding 80 weight portions stirs formation slurries, be coated in uniformly on positive pole base flow body rolling aluminum foil, roll with roller after drying, make anode pole piece.
Prepare cathode pole piece: the artificial graphite material mixing 95.2 weight portions, the conductive black SP of 1.0 weight portions, the CMC (CMC) of 1.3 weight portions and the butadiene-styrene rubber (SBR) of 2.5 weight portions, and the dried up stirring of going adding 140 weight portions forms slurries, be coated on negative pole base flow body electrolytic copper foil uniformly, roll with roller after drying, make cathode pole piece.
Prepare barrier film: barrier film employing thickness is polypropylene (PP) barrier film of 30 microns.
Prepare electrolyte: electrolyte is the weight ratio (15.4:37:5:5:12:25.6) of lithium hexafluoro phosphate (LiPF6), ethylene carbonate (EC), propene carbonate (PC), dimethyl carbonate (DMC), diethyl carbonate (DEC), methyl ethyl carbonate (EMC), adds 2% vinylene carbonate (VC) and propylene sulfite (PS) additive in addition.
Prepare shell: shell adopts aluminum plastic film, aluminum plastic film employing thickness is 152 microns and has nylon layer, tack coat, PP layer, tack coat, aluminium foil, tack coat, PP shape sandwich layer by layer.
Prepare external terminal: positive terminal adopts 0.2 millimeters thick aluminium material lug, and negative terminal adopts 0.2 millimeter of copper nickel plating lug.
Prepare insulation hardboard, thickness 2mm, size is than the four little 1mm in limit of battery core after lamination, and the length of the hardboard that namely insulate and wide size are than the length of battery core and wide each little 1mm.The space of a whole page spiles.
Prepare battery: with laminar, anode pole piece, barrier film, the alternate lamination of cathode pole piece are formed battery core, unidirectional soldering polar ear; Weld the ready 2 pieces of insulation hardboards of battery core and be placed on battery core top and bottom, with hardboard such as fixed insulation such as adhesive tape 3 grade, keep battery core to be clamped; Then carry out aluminum plastic film heat-sealing, inject electrolyte, heat-sealing sealing; Carry out shelving successively-preliminary filling--partial volume of finding time-change into, make 50Ah lithium-ion-power cell.
Battery charging and discharging cut-ff voltage is 2.0-3.65V.
After tested, obtained lithium-ion-power cell has following improvement:
1, cycle life raising 5%, loop-around data is shown in Fig. 3 (being the battery that the embodiment of the present invention 1 is obtained after improving, for not adding the obtained battery of insulation hardboard under equal conditions before improvement, lower same),
The resultant battery that partial volume completes needs to carry out the test of single bag cycle life, test condition is: 1C/1C(50A/50A) electric current, with 3.65V constant current charge+3.65V constant voltage charge, loop test is carried out, until capability retention decays to 80% under cut-off current 0.05C (2.5A)/2.0V discharging condition.
2, improve battery drum limit problem, see Fig. 4.
Zig-zag laminated batteries structure both sides barrier film is unlimited, only have last 2 circle encirclements cannot reach degree of tightness requirement, the battery of certain circulation is walked after normally carrying out fluid injection, because having gap between the both positive and negative polarity pole piece of both sides, compactness is bad, can start generation and analyse lithium, afterwards can as snowball, analyse lithium problem and can more and more seriously cause a burst limit, shown in Fig. 4.But add isolation material hardboard, to battery core applying pressure physically, just in time can keep the compactness of battery core both positive and negative polarity pole piece, solve battery and analyse lithium problem.
3, improve battery core outward appearance, see Fig. 5.
Battery can be caused partially soft in order to reach long circulation life increase electrolyte content, battery surface buckling phenomena being caused, as do not improved battery, but increasing insulation hardboard, because insulation hardboard itself is hard material, surfacing, so battery can not cause the problem of appearance such as fold.
Embodiment 2
Concrete scheme is with embodiment 1, and difference is: insulation hardboard thickness is 0.5mm, and size 1mm less of battery core after lamination four limit, the space of a whole page spiles.After tested, cycle life improves 2% to the battery made.
Embodiment 3
Concrete scheme is with embodiment 1, and difference is: insulation hardboard thickness is 2mm, and size 1mm less of battery core after lamination four limit, the space of a whole page spiles.After tested, cycle life improves 5% to the battery made.
Embodiment 4
Concrete scheme is with embodiment 1, and difference is: insulation hardboard thickness is 3mm, and size 1mm less of battery core after lamination four limit, the space of a whole page spiles.After tested, cycle life improves 7% to the battery made.
Above-described embodiment is one of the present invention preferably scheme, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
Claims (6)
1. a flexible packaged battery pool structure, comprise positive plate, barrier film, negative plate are alternate and the battery core that formed or the battery core made with coiling form, metallized aluminum plastic film outside battery core, it is characterized in that: the outer surface of described battery core arranges in flat insulation hardboard, and insulation hardboard is between aluminum plastic film and battery core.
2. flexible packaged battery pool structure according to claim 1, is characterized in that: the number of insulation hardboard is 2, is close to the tow sides of battery core respectively.
3. flexible packaged battery pool structure according to claim 1, is characterized in that: the thickness of insulation hardboard is 0.05mm ~ 3mm.
4. the flexible packaged battery pool structure according to claim 1 or 2 or 3, is characterized in that: the edge of insulation hardboard is between battery core and negative plate.
5. the flexible packaged battery pool structure according to claim 1 or 2 or 3, is characterized in that: insulation hardboard is distributed with several holes.
6. flexible packaged battery pool structure according to claim 5, is characterized in that: described hole is evenly distributed on insulation hardboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410441197.2A CN104810556A (en) | 2014-09-02 | 2014-09-02 | Soft package battery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410441197.2A CN104810556A (en) | 2014-09-02 | 2014-09-02 | Soft package battery structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104810556A true CN104810556A (en) | 2015-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410441197.2A Pending CN104810556A (en) | 2014-09-02 | 2014-09-02 | Soft package battery structure |
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| Country | Link |
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| CN (1) | CN104810556A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109599588A (en) * | 2017-10-02 | 2019-04-09 | 深圳格林德能源集团有限公司 | A kind of polymer Li-ion battery from inhibition core expansion |
| CN111403634A (en) * | 2020-03-27 | 2020-07-10 | 湖北亿纬动力有限公司 | Soft package battery and manufacturing method thereof |
| CN113471547A (en) * | 2021-05-18 | 2021-10-01 | 惠州锂威新能源科技有限公司 | Preparation method of battery and battery |
Citations (6)
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| CN1523700A (en) * | 2003-02-17 | 2004-08-25 | 比亚迪股份有限公司 | Non-aqueous electrolyte lithium secondary battery |
| CN201084759Y (en) * | 2007-08-03 | 2008-07-09 | 深圳市邦凯电子有限公司 | A packing structure of soft-packed lithium ion battery |
| CN201946704U (en) * | 2010-11-30 | 2011-08-24 | 上海比亚迪有限公司 | Pole core of lithium ion battery and lithium ion battery |
| CN203013880U (en) * | 2012-11-14 | 2013-06-19 | 中信国安盟固利动力科技有限公司 | Lithium ion battery with graphite cooling fins |
| CN103268957A (en) * | 2013-05-14 | 2013-08-28 | 曙鹏科技（深圳）有限公司 | Flexible packaging lithium-ion battery |
| CN204179162U (en) * | 2014-09-02 | 2015-02-25 | 浙江万向亿能动力电池有限公司 | A kind of flexible packaged battery pool structure |
-
2014
- 2014-09-02 CN CN201410441197.2A patent/CN104810556A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1523700A (en) * | 2003-02-17 | 2004-08-25 | 比亚迪股份有限公司 | Non-aqueous electrolyte lithium secondary battery |
| CN201084759Y (en) * | 2007-08-03 | 2008-07-09 | 深圳市邦凯电子有限公司 | A packing structure of soft-packed lithium ion battery |
| CN201946704U (en) * | 2010-11-30 | 2011-08-24 | 上海比亚迪有限公司 | Pole core of lithium ion battery and lithium ion battery |
| CN203013880U (en) * | 2012-11-14 | 2013-06-19 | 中信国安盟固利动力科技有限公司 | Lithium ion battery with graphite cooling fins |
| CN103268957A (en) * | 2013-05-14 | 2013-08-28 | 曙鹏科技（深圳）有限公司 | Flexible packaging lithium-ion battery |
| CN204179162U (en) * | 2014-09-02 | 2015-02-25 | 浙江万向亿能动力电池有限公司 | A kind of flexible packaged battery pool structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109599588A (en) * | 2017-10-02 | 2019-04-09 | 深圳格林德能源集团有限公司 | A kind of polymer Li-ion battery from inhibition core expansion |
| CN111403634A (en) * | 2020-03-27 | 2020-07-10 | 湖北亿纬动力有限公司 | Soft package battery and manufacturing method thereof |
| CN113471547A (en) * | 2021-05-18 | 2021-10-01 | 惠州锂威新能源科技有限公司 | Preparation method of battery and battery |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
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 Electric Vehicle 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 Electric Vehicle Co., Ltd. Applicant before: Wanxiang Group Corporation |
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| COR | Change of bibliographic data | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150729 |
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| RJ01 | Rejection of invention patent application after publication |