CN101106203A - Lithium battery with new electrode structure and its making method - Google Patents

Lithium battery with new electrode structure and its making method Download PDF

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Publication number
CN101106203A
CN101106203A CNA2007101380826A CN200710138082A CN101106203A CN 101106203 A CN101106203 A CN 101106203A CN A2007101380826 A CNA2007101380826 A CN A2007101380826A CN 200710138082 A CN200710138082 A CN 200710138082A CN 101106203 A CN101106203 A CN 101106203A
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lug
battery
lithium
pole piece
secondary battery
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Inventor
金凯荣
刘立君
周焕升
刘巍巍
蒋华锋
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ZHONGRUNHENGDONG BATTERY CO Ltd BEIJING
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ZHONGRUNHENGDONG BATTERY CO Ltd BEIJING
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Priority to CNA2007101380826A priority Critical patent/CN101106203A/en
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    • 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 mainly relates to a lithium battery with new electrode structure and the fabrication method thereof. The battery comprises an anode plate, a cathode plate, a diaphragm, electrolyte and a battery shell, and is characterized in that a plurality of lug plates are provided on the anode plate and/or the cathode plate with the preset distance for reserved backings so that a plurality of the lug plates overlap each other after wound to be formed as positive and/or negative lugs; the lug plates can be formed by adding metal conducting foils to the plates, or by a plurality of protruding parts extending out from the base body of the plates in an integral form. The battery in the invention can obviously decrease the inner resistance of the battery, and greatly improve high discharge rate and security of lithium batteries. The lithium batteries are particularly suitable for the application in power sources for electric vehicles, electric toys, model aircrafts, electric tools, communication equipment and so on. The electrode with the present structure can also be applied to other secondary batteries.

Description

Lithium battery and manufacture method thereof with new electrode structure
Technical field
The present invention relates in general to three kinds of battery applications, and specifically, relate to and be used for power-type lithium ion battery, high multiplying power lithium ion battery, and a kind of method of low ESR lithium ion battery making.
Background technology
At present, the lug of coiled lithium ion battery all adopts setting as shown in Figure 1,, reserves the non-coating area 3 of next part at an end of pole piece 1 that is, by welding lug 2 is incorporated into non-coating layer portion 3, and reeling from this end then forms electrode.Yet, for power type, high magnification type, low ESR battery, the area of pole piece is bigger on the one hand, on the other hand, battery electric current when charge and discharge all will be concentrated from an end that connects lug 2 and derive or import, and highly inhomogeneous on CURRENT DISTRIBUTION, electrochemical polarization is very serious, the internal resistance of cell is bigger, and rapid heating phenomenon takes place under the situation of big multiplying power discharging.The battery surface temperature reached 60 ℃ or higher when general 5C discharged, and will have serious fail safe hidden danger in materials such as cobalt acid lithium, nickel cobalt.Therefore, the monomer lithium ion battery of employing winding-structure often can not satisfy the demand of power type, high magnification type, low ESR battery, is difficult to especially realize that high power charging-discharging or ultra-high magnifications discharge and recharge, and this has limited the range of application of coiled battery.
For this reason, some battery production producer adopts lamination technology to make high-power battery, but lamination technology is comparatively complicated, and the equipment input is high, and the qualification rate of production in enormous quantities is also relatively lower, also has many deficiencies in poor actual production of nuclear power hold facility and the application.
Summary of the invention
The objective of the invention is in order to overcome the defective of above-mentioned prior art, solve the difficult problem that traditional takeup type structure can't high power discharge, thereby power lithium-ion battery, high multiplying power lithium ion battery are provided, and the low ESR lithium ion battery.
According to coiling type lithium battery of the present invention, comprise positive plate, negative plate, barrier film, electrolyte, and battery container, it is characterized in that, be provided with a plurality of lug sheets with preset distance on described positive plate and/or negative plate, consequently described a plurality of lug sheet overlaids after reeling are just forming and/or negative electrode lug.Described lug sheet can be to form by the metallic conduction paillon foil is additional to described pole piece, also can extend a plurality of extensions by the matrix from described pole piece and integrally formed.
Lithium ion battery new structure of the present invention has solved present coiled lithium ion battery, stack type lithium ion battery, on the technology, on the structure, make a medium difficult problem that influences the various performances of battery.This battery structure can significantly reduce the internal resistance of cell, greatly improves lithium ion battery high-rate discharge ability and security performance; Solve the uneven problem of CURRENT DISTRIBUTION effectively, reduced the electrochemical polarization phenomenon; Fundamentally solved the phenomenon that lithium ion battery sharply heats up in the high power discharge operating state; Avoided safety issue of the lithium ion battery that causes because temperature rise is too high etc.Lithium ion battery of the present invention is particularly suitable for using aspect power supplys such as electric automobile, electronic toy, the model of an airplane, electric tool, Communication Equipment.
Of the present invention about lithium battery relate to thought and advantage is equally applicable to other secondary cells, therefore, more generally, the present invention relates to the secondary cell that its electrode plates has a plurality of lug sheets.
Description of drawings
Fig. 1 shows the typical embodiment of coiling type lithium battery electrode in the prior art.
Fig. 2 a is the schematic diagram of pole piece before reeling of a kind of embodiment of battery according to the present invention.
Fig. 2 b is the front view of the pole piece shown in Fig. 2 a after reeling.
The end view of pole piece shown in Fig. 2 c Fig. 2 a after reeling.
Fig. 3 shows the schematic diagram behind the coiling of the positive and negative plate shown in Fig. 2 a-2c.
Fig. 4 is the schematic diagram of pole piece before reeling of the another kind of embodiment of battery according to the present invention.
Fig. 5 is for being loaded on the schematic diagram in the housing after positive and negative plate shown in Figure 4 is reeled.
Fig. 6 is the schematic diagram of pole piece before reeling of the another kind of embodiment of battery according to the present invention.
Fig. 7 is the schematic diagram after positive and negative plate shown in Figure 6 is reeled.
Fig. 8 is for being loaded on the schematic diagram in the housing after positive and negative plate shown in Figure 6 is reeled.
Fig. 9 is the schematic diagram of pole piece before reeling of the another kind of embodiment of the present invention.
Figure 10 is with the schematic diagram of the positive and negative plate shown in 9 behind coiling.
Figure 11 is the schematic diagram that is loaded on after positive and negative plate shown in Figure 9 is reeled in the housing.
Figure 12 is the schematic diagram of pole piece before reeling of the another kind of embodiment of the present invention.
Figure 13 is the schematic diagram of positive and negative plate behind coiling shown in Figure 12.
Embodiment
Definition
Term " coiling " is meant that the pole piece that will have certain-length curls so that form the overlapping electrode of multilayer.Unless clear and definite qualification is arranged in the text, reel not only comprise typical meaning, as being rolled into a paper web along the direction thin slice that curls, also comprise a thin slice repeatedly crooked and overlapping along S-shape so that form the overlapping electrode of multilayer
Fig. 2 a is the schematic diagram of pole piece before reeling of a kind of embodiment of battery according to the present invention.Fig. 2 b is the front view of the pole piece shown in Fig. 2 a after reeling.Fig. 2 c is the end view of the pole piece shown in Fig. 2 a after reeling.Referring to Fig. 2 a-2c, before pole piece 1 is reeled or be stacked, on pole piece 1, pass through a plurality of lug sheets 2 of welding affix.The arrange quantity and the density of lug sheet, and the distance between the lug sheet will come specific design according to the size of pole piece after the moulding, so that after curling, the lug sheet 2 of each identical polar can coincide together, form anode ear 2a and negative electrode lug 2b respectively, as shown in Figure 3.
Fig. 4 is the schematic diagram of pole piece before reeling of the another kind of embodiment of battery according to the present invention.In this embodiment, each lug sheet 2 is the extension that is used for the substrate of pole piece 1, and is one-body molded with pole piece.Adopt the advantage of this scheme to be, remove the inconvenience of a plurality of lug sheets of extra soldered from, the lug that makes overlapping back form simultaneously is unlikely to blocked up and spatially brings inconvenience.This is especially favourable under the situation of 0.006mm~0.100mm at thickness for example under the situation of the pole piece that adopts low thickness.In this case, because each lug sheet is too thin, be necessary on the lug sheet group 2 after overlapping by the additional rigid body of welding as external lug 4, as shown in Figure 5.Two lugs 4 shown in the figure are respectively positive and negative lug.
Fig. 6 is the schematic diagram of pole piece before reeling of the another kind of embodiment of battery according to the present invention.In the pole piece shown in Fig. 6, per three lug sheets 2 are arranged in together so that less spacing is equidistant, so that form three anodal auricle group 2a and/or three negative pole auricle group 2b after reeling, as shown in Figure 7.In addition referring to Fig. 8, after pole piece is curled and putting into battery case, the lug sheet group 2 that will extend battery case 3 is soldered to be had on external lug 4a of rigidity and the 4b.Under the situation of large scale and high capacity cell, this set is especially favourable, and it can further reduce the internal resistance of cell, reduces the polarization of electrode degree, thereby the performance of battery is provided.
Fig. 9 is the schematic diagram of pole piece before reeling of a kind of alternate embodiments of the foregoing description.As shown in Figure 9, the lug sheet of reserving in the pole piece 12 is compared the width with obvious raising with last embodiment, and its function is equivalent to or is better than three less reservation lug sheets shown in Figure 6.Simultaneously referring to Figure 10 and Figure 11, when being assembled into battery, can be at this external a plurality of lugs 4 on each wide lug sheet 2.In Figure 11 3 anode ear 4a and 3 negative electrode lug 4b.
Figure 12 is the schematic diagram of pole piece after reeling of the another kind of embodiment of battery according to the present invention.In Figure 12, positive and negative plate is when overlapping, and lug sheet separately can be placed on different ends, and Figure 12 shows anodal auricle 2a and the negative pole auricle 2b that obtains behind the coiling.In the present embodiment, above-mentioned pole piece coiling can be become cylindrical, so that make cylindrical battery.Figure 13 is the end-view of coiling pole piece shown in Figure 12, the lug sheet group of the parts 2 among the figure for obtaining after reeling.
The present invention provides a kind of manufacture method of heavy-duty battery thus, may further comprise the steps:
A) provide the pole piece that has a plurality of lug sheets, described a plurality of lug sheets are with the preset space length setting;
B) reel this pole piece and make and obtain lug sheet group by described a plurality of lug sheet overlaid, thus positive electrode or negative electrode obtained;
C) described electrode is put into a housing, make described lug sheet group stretch out this housing at least in part; And alternatively
D) welding one external lug on described lug sheet group;
E) the required electrolyte of in described housing, packing into, and finish the encapsulation of battery.
Apparently, above-mentioned steps c) and order of operation d) can put upside down.
In a preferred embodiment, described lug sheet is the part of pole piece base material, that is, one side at the matrix that certain interval is reserved certain-length and width of pressing of pole piece, then, positive pole, barrier film, negative pole overlap positive and negative matrix respectively by coiling.Adopt welding with this positive and negative electrode matrix external lug of burn-oning respectively then.
The positive electrode that is used for battery of the present invention can be selected from by cobalt acid lithium, nickle cobalt lithium manganate, lithium nickel cobalt dioxide, LiMn2O4, LiFePO4, the group that phosphoric acid ferrimanganic lithium and phosphoric acid ferrovanadium lithium constitute.
In the present invention, the width of lug, thickness, quantity can be determined according to required power of battery size and volume.
The method according to this invention can be made power lithium-ion battery, high multiplying power lithium ion battery, and the low ESR lithium ion battery.In an embodiment, positive and negative plate can be one-body molded by mould with corresponding lug sheet.Motive-power battery can be reserved base material (so that forming the lug sheet) and more mostly be copper, aluminium foil lug, and anodal auricle overlaps each other in several same positions during coiling, and the negative pole auricle overlaps each other at the another side of several same positions, constitutes the battery roll core structure.
Can significantly reduce the internal resistance of cell, significantly improve lithium ion battery high-rate discharge ability and security performance according to battery of the present invention; Solve the uneven problem of CURRENT DISTRIBUTION effectively, reduced the electrochemical polarization phenomenon; Fundamentally solved the phenomenon that lithium ion battery sharply heats up in the high power discharge operating state; Avoided the safety issue of the lithium ion battery that causes because temperature rise is too high.
In addition, technical scheme according to the present invention has solved former welding battery pole ear and the lug respective side can not cause effectively utilizing material area to descend by coating material, so positive/negative plate is reserved the project organization of base material coiled lithium ion battery, the maximum using battery coating material useful space, thus lithium battery capacity effectively improved.
Adopt integrated execution mode shown in Figure 3 also to solve following problem: to weld multipole ear positive and negative plate, each lug position is difficult for alignment when reeling, owing to the super thick outward appearance that influences battery in the position of overlapping lug, the position intractable of soldering polar ear, have potential safety hazard and influenced battery performance, the lug of many welding has influenced the capacity per unit area utilance on pole piece.
Experiment showed, the product that adopts battery structure of the present invention to make, can improve high-rate charge-discharge capability.Table 1, table 2 and table 3 show the present invention's high multiplying power lithium ion battery of the present invention, power-type lithium ion battery respectively, reach the performance of low ESR lithium ion battery aspect discharging and recharging.
Below three kinds of batteries be all same model 063465, concrete preparation condition is as follows:
Positive electrode: cobalt acid lithium
Negative material: native graphite
Barrier film: 20um*60mm
Electrolyte: high magnification type electrolyte
Employing aluminum-plastic composite membrane packing, inner pole piece length, width, consistency of thickness, other material usage is the same, produce 063465 model, monopole ear battery, 2 lug batteries, 3 lug batteries, 4 lug batteries and according to the battery of invention, wherein, monopole ear, 2 lugs, 3 lugs and 4 lug batteries are to prepare by the lug that welds respective numbers on pole piece respectively, and their performances aspect discharging and recharging are compared as follows:
The contrast of table 1 battery and existing multipole ear battery same model multiplying power discharging according to the present invention
Figure A20071013808200111
Table 2 is according to battery of the present invention and existing multipole ear battery same model capacity comparison
Figure A20071013808200112
Table 3 is according to battery of the present invention and existing multipole ear battery same model internal resistance contrast
Figure A20071013808200113
More than by specific embodiment plate in a circuit according to the invention and the method for using this circuit board assemblies battery pack have been described.It is readily appreciated by a person skilled in the art that implementing details descriptions more of the present invention is not limited to above-mentioned explanation.The expression of using in the literary composition " first ", " second " etc. only are used to distinguish a plurality of identical devices or parts, and are not the description of precedence.Though the embodiment at lithium battery only is provided in the literary composition; but; those skilled in the art; after obtaining instruction of the present invention; can be easy to expect that spirit of the present invention can be applied to other secondary cells equally; therefore, protection scope of the present invention is not limited to lithium battery, and should be as the criterion with the qualification of claims.

Claims (12)

1. a coiled secondary battery comprises positive plate, negative plate, barrier film, electrolyte, and battery container is characterized in that, on described positive plate and/or negative plate, be provided with a plurality of lug sheets with preset distance, thus after reeling described a plurality of lug sheet overlaids, just form and/negative electrode lug.
2. coiled secondary battery according to claim 1, wherein, described lug sheet forms by the metallic conduction paillon foil is additional to described pole piece.
3. coiled secondary battery according to claim 1, wherein, described lug sheet is by being that matrix by described pole piece extends a plurality of extensions and integrally formed.
4. coiled secondary battery according to claim 1, it is a rectangular cell.
5. coiled secondary battery according to claim 4, wherein, the described lug that described lug sheet overlaps to form after reeling is more than one.
6. coiled secondary battery according to claim 1, it is a cylindrical battery.
7. according to each described coiled secondary battery of claim 1 to 6, it is a lithium battery.
8. coiled secondary battery according to claim 7, wherein, the matrix of described pole piece is aluminium foil or Copper Foil, thickness is 0.006mm~0.100mm.
9. coiled secondary battery according to claim 7, wherein, used positive electrode is a cobalt acid lithium, nickle cobalt lithium manganate, lithium nickel cobalt dioxide, LiMn2O4, LiFePO4, phosphoric acid ferrimanganic lithium, one or more mixtures of material of phosphoric acid ferrovanadium lithium.
10. the manufacture method of a secondary cell may further comprise the steps:
A) provide the pole piece that has a plurality of lug sheets, described a plurality of lug sheets are with the preset space length setting;
B) reel described pole piece and make described a plurality of lug sheet overlaid form lug sheet group is so that obtain positive electrode and/or negative electrode;
C) described electrode is put into a housing, make described lug sheet group stretch out this housing at least in part; And
D) the required electrolyte of in described housing, packing into, and finish the encapsulation of battery.
11. method according to claim 10 wherein, can comprise before step d):
E) welding one external lug on described lug sheet group.
12. according to claim 10 or 11 described methods, wherein, described secondary cell is a lithium battery.
CNA2007101380826A 2007-08-08 2007-08-08 Lithium battery with new electrode structure and its making method Pending CN101106203A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102148403A (en) * 2010-02-04 2011-08-10 Ckd株式会社 Battery producing device
CN102437377A (en) * 2011-12-12 2012-05-02 深圳市格瑞普电池有限公司 Winding power core, soft-package lithium ion battery and pole piece
CN101582521B (en) * 2008-05-12 2013-01-02 李东山 Coiled lithium-ion secondary battery taking winding needle as positive and negative electrodes and manufacturing method thereof
CN105244506A (en) * 2015-10-15 2016-01-13 青岛领军节能与新材料研究院 Lithium-ion battery material and lithium-ion battery structure and preparation method of lithium-ion battery material
CN105355983A (en) * 2015-11-30 2016-02-24 珠海格力电器股份有限公司 Battery cell of lithium ion battery and lithium ion battery
WO2016187810A1 (en) * 2015-05-26 2016-12-01 罗明镜 Winding type lithium ion battery
CN111584920A (en) * 2020-05-11 2020-08-25 Oppo广东移动通信有限公司 Preparation method of special-shaped battery
CN112889181A (en) * 2020-01-20 2021-06-01 宁德新能源科技有限公司 Electrode assembly and battery
CN113922000A (en) * 2021-09-29 2022-01-11 珠海冠宇电池股份有限公司 Winding type battery cell and electrochemical device
CN114614147A (en) * 2022-03-16 2022-06-10 三一技术装备有限公司 Cylindrical battery and new energy vehicle
CN115007394A (en) * 2022-06-24 2022-09-06 三一技术装备有限公司 Intermittent coating equipment, coating method, pole piece belt and lithium battery
WO2023283848A1 (en) * 2021-07-15 2023-01-19 Shenzhen Xpectvision Technology Co., Ltd. Battery roll testing with imaging systems

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101582521B (en) * 2008-05-12 2013-01-02 李东山 Coiled lithium-ion secondary battery taking winding needle as positive and negative electrodes and manufacturing method thereof
CN102148403B (en) * 2010-02-04 2014-06-18 Ckd株式会社 Battery producing device
CN102148403A (en) * 2010-02-04 2011-08-10 Ckd株式会社 Battery producing device
CN102437377A (en) * 2011-12-12 2012-05-02 深圳市格瑞普电池有限公司 Winding power core, soft-package lithium ion battery and pole piece
WO2016187810A1 (en) * 2015-05-26 2016-12-01 罗明镜 Winding type lithium ion battery
CN105244506A (en) * 2015-10-15 2016-01-13 青岛领军节能与新材料研究院 Lithium-ion battery material and lithium-ion battery structure and preparation method of lithium-ion battery material
AU2016364095B2 (en) * 2015-11-30 2020-02-06 Gree Electric Appliances, Inc. Of Zhuhai Lithium-ion battery cell and lithium-ion battery
CN105355983B (en) * 2015-11-30 2018-05-11 珠海格力电器股份有限公司 A kind of lithium ion battery cell and lithium ion battery
CN105355983A (en) * 2015-11-30 2016-02-24 珠海格力电器股份有限公司 Battery cell of lithium ion battery and lithium ion battery
CN112889181A (en) * 2020-01-20 2021-06-01 宁德新能源科技有限公司 Electrode assembly and battery
CN112889181B (en) * 2020-01-20 2022-06-17 宁德新能源科技有限公司 Electrode assembly and battery
CN111584920A (en) * 2020-05-11 2020-08-25 Oppo广东移动通信有限公司 Preparation method of special-shaped battery
WO2023283848A1 (en) * 2021-07-15 2023-01-19 Shenzhen Xpectvision Technology Co., Ltd. Battery roll testing with imaging systems
CN113922000A (en) * 2021-09-29 2022-01-11 珠海冠宇电池股份有限公司 Winding type battery cell and electrochemical device
CN113922000B (en) * 2021-09-29 2023-08-22 珠海冠宇电池股份有限公司 Winding type battery cell and electrochemical device
CN114614147A (en) * 2022-03-16 2022-06-10 三一技术装备有限公司 Cylindrical battery and new energy vehicle
CN115007394A (en) * 2022-06-24 2022-09-06 三一技术装备有限公司 Intermittent coating equipment, coating method, pole piece belt and lithium battery

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