CN101752613A - Power soft packaging lithium ion battery with high power - Google Patents
Power soft packaging lithium ion battery with high power Download PDFInfo
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- CN101752613A CN101752613A CN200810154166A CN200810154166A CN101752613A CN 101752613 A CN101752613 A CN 101752613A CN 200810154166 A CN200810154166 A CN 200810154166A CN 200810154166 A CN200810154166 A CN 200810154166A CN 101752613 A CN101752613 A CN 101752613A
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- lithium ion
- battery
- ion battery
- power
- soft packaging
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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 discloses a power soft packaging lithium ion battery with high power. The power soft packaging lithium ion battery is realized by the following technical scheme that a diaphragm has a structure for coiling according to the square battery pole group structure. The power soft packaging lithium ion battery is characterized in that a pole piece is inserted into an inflection point of each square surface of the diaphragm, and the pole piece has a two-way extraction lug structure; and the center of the pole group is provided with a micropore plastic plate skeleton. The lithium ion battery thoroughly changes the existing power battery mode, improves the mass ratio energy and the energy density of the battery by the external packaging structure of an aluminum plastics composite membrane, improves the afflux structure of an internal pole group by an innovative coiling lamination structure, and improves the defect of low strength of the aluminum plastics membrane by adding internally a micropore plastic skeleton structure so as to improve the safety performance of the battery.
Description
Technical field
The present invention relates to field of batteries, in particular, relate to a kind of power soft packaging lithium ion battery with high power, improve, improve the chemical property of battery by optimization to the whole afflux structure of inside battery.
Background technology
Lithium ion battery compare with the battery of other types such as plumbic acid, cadmium nickel have that specific capacity is big, operating voltage is high, charging rate is fast, operating temperature range is wide, have extended cycle life, volume is little, advantage such as in light weight.At present, be widely used in fields such as mobile phone, notebook computer, electric tool, and its range of application more and more widely.
Expansion along with the lithium ion battery scope of application, we call electrokinetic cell to the chemical power source that is applied to dynamic power system traditionally, as be applied to fields such as electric tool, electric motor car, electrokinetic cell service condition complexity also requires battery to have higher volumetric properties and power-performance and excellent safety energy simultaneously.Employing lead-acid battery and ickel-cadmium cell that present traditional electrokinetic cell is more, instructions for use when these two kinds of batteries can provide bigger output current often to need high-power output to be suitable for electric tool and electric motor car wants to adopt lithium ion battery must further improve the power-performance of battery to satisfy the instructions for use of electrokinetic cell on present basis as electrokinetic cell.
The current driving force lithium ion battery is applied to electric automobiles by more beginning, this cell mostly is the square structure greatly can more effectively utilize the space when combination, housing adopts metallic hard materials such as box hat or aluminum hull, multipole group of parallel-connection structure generally adopted in inside, and the one pole group adopts lamination or takeup type structure.Adopt the metal shell structure can cause bigger quality burden and production cost, be unfavorable for improving the specific discharge capacity of cell, and it is very loaded down with trivial details to adopt this inside configuration to connect with afflux structure, more space waste and the too high situation of local internal resistance can appear, and the high-power output situation that electrokinetic cell is occurred in actual condition is very obvious, the too high meeting of local internal resistance causes the inner too high local temperature rise that occurs, cause inside battery to produce gas, interior pressure is excessive, make the polarization phenomena of battery more obvious, directly cause battery shortening in useful life and higher potential safety hazard occurs.Therefore, want finally to realize the successful Application of lithium ion battery on dynamical system, we change existing mentality of designing an urgent demand, further improve the energy and the power-performance of battery, simplify internal structure, improve the afflux structure of inside battery, make inside battery realize the electric field and the temperature field of a unanimity, satisfy the instructions for use of dynamic power system.
Summary of the invention
The objective of the invention is to overcome existing shortcoming in the traditional power battery, completely the available dynamic battery mode is changed, improve the specific energy and the energy density of battery by the outer enclosure structure that adopts aluminum-plastic composite membrane, improve the afflux structure of internal poles group by innovative takeup type lamination, increase micropore shape plastic skeleton structure by inside and improve the low defective of aluminum plastic film packaged battery intensity, to improve the security performance of battery, provide a kind of power soft packaging lithium ion battery with high power.
Power soft packaging lithium ion battery with high power of the present invention, be achieved by following technical proposals, the structure of barrier film for reeling according to rectangular cell utmost point group structure, it is characterized in that: each flex point place of square inserts pole piece at described barrier film, pole piece is two-way extraction pole ear structure, and utmost point group switching centre is provided with the cellular plastic framework.
Lug of the present invention adopts the empty paper tinsel that stays on two-way ultra-sonic welded lead-out mode and the utmost point group limit to weld.The aluminum-plastic composite membrane encapsulating structure is adopted in described outside batteries encapsulation.
The present invention has following beneficial effect:
The internal poles group adopts square structure, traditional square utmost point component is takeup type and stacked two kinds of structures, takeup type structure space utilance is low, and it is consistent that the square utmost point group of takeup type structural thickness is difficult to control, when the micro-aerogenesis in inside, be easy to cause fold and air band, cause pole piece lithium to occur analysing, influence battery useful life and security performance, and laminated structure can well address these problems, utmost point group thickness evenly can effectively be avoided the fold of utmost point group inside and analyse the lithium phenomenon, laminated structure commonly used at present adopts " it " font lamination or sack type structure usually, these two kinds of structures all can not effectively be located utmost point group, in the battery use if the vibration situation is easy to occur the pole piece dislocation, potential safety hazard appears.The invention provides a kind of novel " it is stacked to reel " utmost point group structure, learn from other's strong points to offset one's weaknesses, combine the advantage of two kinds of structures, two kinds of defectives that structure exists have effectively been improved, promptly adopt " membrane coil around, pole piece stacked " structure, barrier film is still reeled according to rectangular cell utmost point group structure, inserts pole piece at each flex point place of square, by barrier film stacked pole piece structure is carried out fastening location, realized the optimum organization of two kinds of structures.Pole piece adopts two-way extraction pole ear structure, and lug adopts the ultrasonic bonding mode to connect, and has realized the optimized design of inner afflux structure.
Battery externally encapsulates and adopts the aluminum-plastic composite membrane encapsulating structure, this encapsulating material can be realized the optimal utilization in quality and space, improved the energy density of battery, and utmost point group carried out the vacuum compact package, by outer enclosure utmost point group is fixed, reduced the influence of external impedance that complicated assembly structure brings to electrode system, but aluminum plastic film encapsulating structure heat dispersion is poor than metal shell, therefore utmost point group is designed to thin slice shape to increase the heat-sinking capability of battery when the heavy-current discharge, but the aluminum plastic film encapsulating material is a soft materials, intensity is relatively poor, if area is bigger, whole deformation takes place in sheet type battery easily when large tracts of land is born pressure, what the present invention innovated has added the skeleton structure of micropore shape hard PP plastic plate as flexible-packed battery in utmost point group centre, improved the strength character of battery, and micropore shape structure is after battery carries out Vacuum Package, can hold certain gas, prevented that effectively battery from producing minimum gas and causing the battery bulging when heavy-current discharge, internal resistance increases phenomenon.
Description of drawings
Fig. 1 is a utmost point group front view of the present invention;
Fig. 2 is a utmost point group vertical view of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.
Design a 5Ah high power lithium ion cell, embodiment is as follows.
The making of pole piece:
Positive plate: with LiFePO
4, carbon black evenly mixes LiFePO in proportion with N-methyl pyrrolidone (NMP) solution of Kynoar
4Active material accounts for gross mass 90%, evenly is coated on aluminium foil (20 μ) collector, and coating density is 24mg/cm
2, 120 ℃ of oven dry down, through rolling densification, the pole piece THICKNESS CONTROL is 130 ± 2 μ m, carries out cutting, the material district is of a size of 118 * 68mm.
Negative plate: MCMB powder, carbon black are mixed in proportion with N-methyl pyrrolidone (NMP) solution of Kynoar, and MCMB accounts for 90% of negative pole gross mass, evenly is coated on Copper Foil (15 μ) collector, and coating density is 9.7mg/cm
2, through densification, pole piece thickness is 75 ± 2 μ m, carries out cutting after the oven dry, the material district is of a size of 119 * 69mm.
Barrier film adopts 25 μ Celgard2025 barrier films, and the center pad adopts multi-layer microporous shape PP plastics.
Utmost point assembling timing is assembled according to Fig. 1, structure illustrated in Figure 2; as shown in Figure 2, the center is a cellular plastic pad 1, and barrier film 2 is reeled near plastic spacer (fixing with protective tapes); insert negative plate after the bending successively; as shown in Figure 2, the utmost point group bosom pole piece of coiling and molding is a negative pole 4, and outermost is anodal 3; all adopt the single face coating; as shown in Figure 1, the negative pole face of close center pad is a Copper Foil 6, near the just very aluminium foil 5 of outer enclosure film.Positive and negative plate is 26 in the present embodiment, and utmost point group thickness is 7.7mm behind the utmost point group coiling and molding.Reel utmost point group both sides, back for the Copper Foil of reserving 10mm and aluminium foil baffle as with the link position of lug.Positive and negative lug adopts the conventional polymer lug, and as shown in Figure 1, anode ear 7 adopts aluminium matter lug, and negative electrode lug 8 adopts copper lug, adopts the empty paper tinsel that stays on ultra-sonic welded mode and the utmost point group limit to weld lug.Finally obtain utmost point group as shown in Figure 1.
With the utmost point group that assembles according to polymer fluid injection, packaging technology carry out fluid injection, assembling makes the lithium ion battery that capacity is 5Ah after changing into.
Embodiment of the present invention have below been described in conjunction with the accompanying drawings.But, should be clear and definite, the embodiment that the present invention is not limited to narrate above, person skilled in art can make various modifications and replace and also belong to the present invention under the situation that does not depart from the spirit or scope that the appended every claim of the present invention defines.
Claims (3)
1. power soft packaging lithium ion battery with high power, the structure of barrier film for reeling according to rectangular cell utmost point group structure, it is characterized in that: each flex point place of square inserts pole piece at described barrier film, and pole piece is two-way extraction pole ear structure, and utmost point group switching centre is provided with the cellular plastic framework.
2. power soft packaging lithium ion battery with high power according to claim 1 is characterized in that: lug adopts the empty paper tinsel that stays on two-way ultra-sonic welded lead-out mode and the utmost point group limit to weld.
3. power soft packaging lithium ion battery with high power according to claim 1 is characterized in that: the aluminum-plastic composite membrane encapsulating structure is adopted in described outside batteries encapsulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810154166A CN101752613A (en) | 2008-12-16 | 2008-12-16 | Power soft packaging lithium ion battery with high power |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810154166A CN101752613A (en) | 2008-12-16 | 2008-12-16 | Power soft packaging lithium ion battery with high power |
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| CN101752613A true CN101752613A (en) | 2010-06-23 |
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| CN200810154166A Pending CN101752613A (en) | 2008-12-16 | 2008-12-16 | Power soft packaging lithium ion battery with high power |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340036A (en) * | 2011-09-27 | 2012-02-01 | 力神迈尔斯动力电池系统有限公司 | High-capacity lithium ion battery |
| CN103187593A (en) * | 2011-12-30 | 2013-07-03 | 万向电动汽车有限公司 | Preparation method of flexible-package high-power lithium ion power battery |
| CN109273778A (en) * | 2018-09-26 | 2019-01-25 | 天津力神电池股份有限公司 | The rectangular solid state battery of type of respiration |
| CN109638362A (en) * | 2018-11-02 | 2019-04-16 | 天津力神电池股份有限公司 | A kind of battery pole group and preparation method and lithium-ion-power cell |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1449067A (en) * | 2002-03-29 | 2003-10-15 | 松下电器产业株式会社 | Betteries |
| CN101162777A (en) * | 2007-10-11 | 2008-04-16 | 广东国光电子有限公司 | High power plastic-aluminum flexible packing lithium ionic cell |
-
2008
- 2008-12-16 CN CN200810154166A patent/CN101752613A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1449067A (en) * | 2002-03-29 | 2003-10-15 | 松下电器产业株式会社 | Betteries |
| CN101162777A (en) * | 2007-10-11 | 2008-04-16 | 广东国光电子有限公司 | High power plastic-aluminum flexible packing lithium ionic cell |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340036A (en) * | 2011-09-27 | 2012-02-01 | 力神迈尔斯动力电池系统有限公司 | High-capacity lithium ion battery |
| CN103187593A (en) * | 2011-12-30 | 2013-07-03 | 万向电动汽车有限公司 | Preparation method of flexible-package high-power lithium ion power battery |
| CN103187593B (en) * | 2011-12-30 | 2016-07-06 | 万向电动汽车有限公司 | A kind of preparation method of flexible-package high-power lithium ion power battery |
| CN109273778A (en) * | 2018-09-26 | 2019-01-25 | 天津力神电池股份有限公司 | The rectangular solid state battery of type of respiration |
| CN109638362A (en) * | 2018-11-02 | 2019-04-16 | 天津力神电池股份有限公司 | A kind of battery pole group and preparation method and lithium-ion-power cell |
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Application publication date: 20100623 |