CN101752613A - Power soft packaging lithium ion battery with high power - Google Patents

Power soft packaging lithium ion battery with high power Download PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
lithium ion
battery
ion battery
power
soft packaging
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
Application number
CN200810154166A
Other languages
Chinese (zh)
Inventor
邱扬
叶茂
刘凤龙
李敬
脱佳彬
杜磊
吕小梅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin Lishen Battery JSCL
Original Assignee
Tianjin Lishen Battery JSCL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tianjin Lishen Battery JSCL filed Critical Tianjin Lishen Battery JSCL
Priority to CN200810154166A priority Critical patent/CN101752613A/en
Publication of CN101752613A publication Critical patent/CN101752613A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing 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

Power soft packaging lithium ion battery with high power
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.
CN200810154166A 2008-12-16 2008-12-16 Power soft packaging lithium ion battery with high power Pending CN101752613A (en)

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

Applications Claiming Priority (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

Publications (1)

Publication Number Publication Date
CN101752613A true CN101752613A (en) 2010-06-23

Family

ID=42479218

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200810154166A Pending CN101752613A (en) 2008-12-16 2008-12-16 Power soft packaging lithium ion battery with high power

Country Status (1)

Country Link
CN (1) CN101752613A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
JP4433650B2 (en) Lithium secondary cell and connection structure of lithium secondary cell
JP4790732B2 (en) High-capacity lithium ion secondary battery with metal casing
CN204834764U (en) Cylindrical high magnification lithium ion battery of edge weld
CN102347512B (en) Large-capacity lithium ion battery
CN109768337A (en) The chargeable button-shaped soft bag lithium ionic cell of one kind and processing method
CN101752613A (en) Power soft packaging lithium ion battery with high power
CN100349322C (en) Cylindrical flexible packed lithium ion storage cell with aluminum-plastic composite film
CN103066321A (en) High capacity and high rate type soft-package lithium iron phosphate battery
CN203521496U (en) Apple-shaped large-power polymer lithium battery
JP2001167744A (en) Lithium secondary battery and method for fabricating the same
CN103219524B (en) A kind of laminated lithium ion battery plus plate current-collecting body paillon foil, anode pole piece and battery
CN202917600U (en) Aluminum-plastic packed high-power lithium ion battery
CN202384439U (en) Lithium ion battery winding structure
CN201490241U (en) Lithium cell cover plate assembly and lithium cell using same
CN212136591U (en) Lithium ion battery positive pole piece and lithium ion battery
CN212434666U (en) Anode plate and lithium ion battery
CN202150519U (en) Lithium ion secondary battery without polar ears
CN202275893U (en) Lithium ion battery
CN201673968U (en) Miniature polymer lithium ion battery with dissymmetrical assembly structure
CN209981391U (en) High-capacity cylindrical battery
CN207474594U (en) A kind of lithium ion cylinder battery
CN202695643U (en) Lithium-ion battery rolling core structure battery cell and lithium-ion battery thereof
CN202308197U (en) Polymer lithium ion battery with internal multi-winding-core parallel structure
CN202339959U (en) Multi-winding core lithium ion battery
CN201877530U (en) Lithium ion power battery with bidirectional current collectors

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: 20100623