CN1805205A - Electrode plate core of lithium ion cell and lithium ion cell with the same - Google Patents
Electrode plate core of lithium ion cell and lithium ion cell with the same Download PDFInfo
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- CN1805205A CN1805205A CNA2005100021456A CN200510002145A CN1805205A CN 1805205 A CN1805205 A CN 1805205A CN A2005100021456 A CNA2005100021456 A CN A2005100021456A CN 200510002145 A CN200510002145 A CN 200510002145A CN 1805205 A CN1805205 A CN 1805205A
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- pole piece
- barrier film
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to an electrode sheet core of lithium battery and relative lithium battery. The inventive electrode sheet core comprises the coiled cathode electrode sheet (1) and anode electrode sheet (3) and a layer of baffle film (2) between them; the inner side of anode electrode sheet (3), and the coiling first end and the first bended part of anode electrode sheet (3) have at least one layer of baffle film (2); and the coiling first ends at the outer sides and the first bended parts of anode electrode sheet (3) and/or cathode electrode sheet (1) have at least one layer of baffle film (2). The invention can reduce the short circuit rate of battery caused by the burr on the electrode sheet.
Description
Technical field
The present invention relates to lithium ion battery, relate in particular to the electrode label of lithium ion battery.
Background technology
Flourish along with information technology, and improving constantly to the environmental protection attention degree, lithium ion battery has obtained huge development with its high-energy-density, high voltage, advantage such as volume is little, in light weight, fail safe is good over past ten years, become one of main energy sources of communication class electronic product.
Lithium ion battery is as a kind of chemical power source, refers to respectively the secondary cell that constitutes as both positive and negative polarity with two compounds that can reversibly embed with the removal lithium embedded ion.When battery charge, lithium ion takes off embedding from positive pole, in negative pole, embed, otherwise during discharge.Existing lithium ion battery mainly is divided into rectangular lithium ion battery and column lithium ion battery according to its shape.Rectangular lithium ion battery is mainly used in mobile phone and the power-equipment as its power supply.Column lithium ion battery then is one of main power supply of notebook computer.
Lithium ion battery comprises electrode label and nonaqueous electrolytic solution, and described electrode label and nonaqueous electrolytic solution are sealed in the battery container, and described electrode label comprises strip anode pole piece, cathode pole piece and barrier film, and reeling by the volume pin forms.Wherein rectangular lithium ion battery is to reel with plate shaped volume pin, forms pancake electrode slice core body.Fig. 1 is the sectional view of the electrode label of existing lithium ion battery, and as can be seen from Figure 1, the electrode label of existing lithium ion battery comprises cathode pole piece 1, anode pole piece 3 and 1 layer of barrier film 2 between cathode pole piece 1 and anode pole piece 3 of reeling and forming; In the inboard of anode pole piece 3,, also be provided with at least 1 layer of barrier film 2 in addition in the anode pole piece 3 coiling head ends and first bending place.Wherein, one of the coiling head end of anode pole piece 3 and cathode pole piece 1 is positioned at left end, and one is positioned at right-hand member, promptly is oppositely arranged, thereby guarantees anode pole piece 3 and cathode pole piece 1 maintenance symmetry in the electrode label of making, and promptly the sheet number equates.Adopting significant disadvantages of existing lithium ion battery of this spline structure is that the battery short circuit rate is higher, and the qualification rate that this has had a strong impact on battery has increased the total production cost of battery.
The result that the higher reason of lithium ion battery short circuit ratio is analyzed shows, in the preparation process of existing lithium ion battery, the edge of pole piece can form burr inevitably, and burr to puncture barrier film be one of factor that causes internal short-circuit of battery.Cause internal short-circuit of battery in order to reduce owing to burr punctures barrier film, existing method adopts the technology that reduces burr mostly, for example, can adopt the machining accuracy that promotes cutting tool to reduce the generation of electrode plates burr, to reduce the internal short-circuit of battery rate, prevent the potential safety hazard that causes by short circuit.But, adopt the effect of this method minimizing internal short-circuit of battery rate also not obvious, and this method has increased the complexity of preparation electrode label technology, and the production cost that the reduction of battery short circuit rate is reduced is not enough to offset because the production cost that the complexity of technology increases.
Summary of the invention
The purpose of this invention is to provide and a kind ofly have low short circuit ratio, and lower-cost lithium ion battery and electrode label thereof.
The present inventor has carried out careful analysis to the higher reason of lithium ion battery short circuit ratio, find the location of short circuit that existing rectangular lithium ion battery is caused because of the pole piece problem, mainly concentrate on anode pole piece and cathode pole piece coiling head end and first bending place of reeling, its reason is, is cutting and the more position of collision burr because the characteristics that pole piece cuts among the existing preparation technology cause anode pole piece and cathode pole piece coiling head end.And the curvature of first bending place of reeling is the position of electrode label maximum, it also is the place that barrier film bears positive plate and negative plate pressure maximum, therefore, reduce the prepared electrode plates that burr generates even adopt, with anode pole piece, cathode pole piece and the membrane coil between anode pole piece and the cathode pole piece around the time, also cause the first bending folding line of reeling to produce breach easily, form burr.
Electrode label provided by the invention comprises cathode pole piece 1, anode pole piece 3 and 1 layer of barrier film 2 between cathode pole piece 1 and anode pole piece 3 of reeling and forming, inboard at anode pole piece 3, in the anode pole piece 3 coiling head ends and first bending place, also be provided with at least 1 layer of barrier film 2 in addition, wherein, the coiling head end and first bending place in the outside of anode pole piece 3 and/or cathode pole piece 1 also are provided with at least 1 layer of barrier film 2 in addition.
Lithium ion battery provided by the invention comprises the electrode label, and wherein, described electrode label is aforesaid electrode label.
The defective that electrode label provided by the invention exists according to prior art electrode label, employing is in the coiling head end and first bending place in the outside of anode pole piece 3 and/or cathode pole piece 1, also be provided with the method for at least 1 layer of barrier film 2 in addition, make the anode pole piece 3 that is positioned at this place and the barrier film 2 of cathode pole piece 1 increase to multilayer, on the one hand, barrier film 2 numbers of plies increase, make barrier film 2 be difficult for being penetrated by burr, significantly reduced the internal short-circuit of battery that is caused because of the pole piece burr, on the other hand, owing to only in very little scope, increase the number of plies of barrier film, therefore, can not influence the embedding of entire cell positive pole and negative electrode lithium ion and take off embedding, cost is also lower simultaneously.
Description of drawings
Fig. 1 is the sectional view of the electrode label of prior art lithium ion battery;
Fig. 2-the 4th, the sectional view of the electrode label of lithium ion battery of the present invention.
Embodiment
According to a specific embodiments of electrode label provided by the invention, electrode label provided by the invention comprises cathode pole piece 1, anode pole piece 3 and 1 layer of barrier film 2 between cathode pole piece 1 and anode pole piece 3 of reeling and forming; In the inboard of anode pole piece 3, in the anode pole piece 3 coiling head ends and first bending place, also be provided with at least 1 layer of barrier film 2 in addition, wherein, the coiling head end and first bending place in the outside of anode pole piece 3 also are provided with at least 1 layer of barrier film 2, as shown in Figure 2 in addition.
According to second specific embodiments of electrode label provided by the invention, electrode label provided by the invention comprises cathode pole piece 1, anode pole piece 3 and 1 layer of barrier film 2 between cathode pole piece 1 and anode pole piece 3 of reeling and forming; In the inboard of anode pole piece 3, in the anode pole piece 3 coiling head ends and first bending place, also be provided with at least 1 layer of barrier film 2 in addition, wherein, the coiling head end and first bending place in the outside of cathode pole piece 1 also are provided with at least 1 layer of barrier film 2, as shown in Figure 3 in addition.
According to the 3rd specific embodiments of electrode label provided by the invention, electrode label provided by the invention comprises cathode pole piece 1, anode pole piece 3 and 1 layer of barrier film 2 between cathode pole piece 1 and anode pole piece 3 of reeling and forming; Inboard at anode pole piece 3, in the anode pole piece 3 coiling head ends and first bending place, also be provided with at least 1 layer of barrier film 2 in addition, wherein, the coiling head end and first bending place in the outside of anode pole piece 3 and cathode pole piece 1 are provided with at least 1 layer of barrier film 2 simultaneously in addition, as shown in Figure 4.
According to electrode chip provided by the invention, the number of plies of the barrier film 2 that is provided with in addition in the coiling head end and first bending place in the outside of anode pole piece 3 and/or cathode pole piece 1 can be according to anode pole piece 3 and/or cathode pole piece 1 on the size of burr and the thickness of barrier film determine.The thickness of barrier film is big more, and the number of plies of required barrier film is few more, and vice versa.In general, the number of plies of described barrier film make the gross thickness of barrier film be burr height 0.7-2 doubly.Because barrier film itself has certain toughness, can guarantee that barrier film is not pierced through by burr like this.Under the preferable case, the number of plies of described barrier film make the gross thickness of barrier film be burr height 0.85-1.5 doubly.
For example, the thickness of existing barrier film 2 generally is about the 0.01-0.03 millimeter.The present inventor finds, the coiling head end in the anode pole piece 3 and/or cathode pole piece 1 outside and the height of the first bending place burr are near the thickness of layer 2-3 barrier film, therefore, in order both to guarantee that described barrier film 2 is not pierced through by burr, guarantee that again the ion-exchange between the both positive and negative polarity can more successfully carry out, the number of plies of the barrier film 2 that is provided with in addition in the coiling head end and first bending place in the anode pole piece 3 and/or cathode pole piece 1 outside is preferably 2-6 layer, more preferably layer 2-4.What deserves to be explained is, along with the development of technology, possible thickening of the thickness of barrier film or attenuation, therefore, the number of plies of the barrier film 2 that is provided with in addition in the coiling head end and first bending place in the anode pole piece 3 and/or cathode pole piece 1 outside also should change thereupon.
Consisting of of anode pole piece 3 is conventionally known to one of skill in the art, and in general, anode pole piece 3 comprises conducting base and coating and/or is filled in positive electrode active materials on the conducting base (also being collector body).Described conducting base is conventionally known to one of skill in the art, for example can be selected from aluminium foil.Described positive electrode active materials is conventionally known to one of skill in the art, and it comprises positive active material and adhesive, and described positive active material can be selected from the positive active material of lithium ion battery routine, as Li
xNi
1-yCoO
2(wherein, 0.9≤x≤1.1,0≤y≤1.0), Li
mMn
2-nB
nO
2(wherein, B is a transition metal, 0.9≤m≤1.1,0≤n≤1.0), Li
1+aM
bMn
2-bO
4(wherein ,-0.1≤a≤0.2,0≤b≤1.0, M is one or more in lithium, boron, magnesium, aluminium, titanium, chromium, iron, cobalt, nickel, copper, zinc, gallium, yttrium, fluorine, iodine, the element sulphur.The kind of described adhesive and content are conventionally known to one of skill in the art, and for example fluorine resin and polyolefin compound are as in polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), the butadiene-styrene rubber (SBR) one or more.In general, the content of described adhesive is the 0.01-8 weight % of positive active material, is preferably 1-5 weight %.Described positive electrode active materials can also comprise anodal auxiliary agent, the kind of described anodal auxiliary agent and content are conventionally known to one of skill in the art, for example, described anodal auxiliary agent can be selected from conductive agent (at least a as in acetylene black, conductive carbon black and the electrically conductive graphite, its content is the 0-15 weight % of positive active material, is preferably 0-10 weight %.
Consisting of of cathode pole piece 1 is conventionally known to one of skill in the art, and in general, cathode pole piece 1 comprises conducting base and coating and/or is filled in negative active core-shell material on the conducting base.Described conducting base is conventionally known to one of skill in the art, for example can be selected from Copper Foil.Described negative active core-shell material is conventionally known to one of skill in the art, it comprises negative electrode active material and adhesive, described negative electrode active material can be selected from the negative electrode active material of lithium ion battery routine, as in native graphite, Delanium, petroleum coke, organic cracking carbon, carbonaceous mesophase spherules, carbon fiber, ashbury metal, the silicon alloy one or more.Described adhesive can be selected from the adhesive of lithium ion battery routine, as in polyvinyl alcohol, polytetrafluoroethylene, CMC (CMC), the butadiene-styrene rubber (SBR) one or more.In general, the content of described adhesive is the 0.5-8 weight % of negative electrode active material, is preferably 2-5 weight %.
Described barrier film is arranged between positive pole and the negative pole, and it has electrical insulation capability and liquid retainability energy, and it is selected from various barrier films used in the lithium ion battery, as polyolefin micro porous polyolefin membrane, polyethylene felt, glass mat or ultra-fine fibre glass paper.Described barrier film is conventionally known to one of skill in the art.
Described anode pole piece 3 and cathode pole piece 1 can adopt existing method preparation.
For example, the preparation method of conventional anode pole piece 3 is included in and applies a kind of slurries that contain positive active material and adhesive on the wide cut pole piece, drying, and rolling is also cut, and obtains anode pole piece 3.Wherein, the described solvent that contains the slurries of positive active material and adhesive can be selected from conventional solvent, as being selected from N-methyl pyrrolidone (NMP), dimethyl formamide (DMF), diethylformamide (DEF), dimethyl sulfoxide (DMSO) (DMSO), oxolane (THF) and water and the alcohols one or more.The consumption of solvent can make described slurry can be coated on the described collector body and get final product.In general, it is 40-90 weight % that the consumption of solvent makes the content of positive active material in the slurries, is preferably 50-85 weight %.Dry temperature is generally 50-160 ℃, preferred 80-150 ℃.Rolling is in order to be that the wide cut pole piece rolling that is purchased becomes the required thickness of anode pole piece, and this thickness can be according to various battery needs and change in very large range.The purpose of cutting is in order to make the wide cut pole piece be cut into the needed width of anode pole piece, and this width can be according to various battery needs and change in very large range.
The preparation method of cathode pole piece is identical with the preparation method of anode pole piece 3, just replaces containing the slurries of positive active material and adhesive with the slurries that contain negative electrode active material and adhesive.
According to lithium ion battery provided by the invention, except containing described electrode label, also contain other necessary assembly of lithium ion battery, as nonaqueous electrolytic solution and battery case, described nonaqueous electrolytic solution and described electrode label are sealed in the battery case.
Described nonaqueous electrolytic solution is the mixed solution of electrolyte lithium salt and nonaqueous solvents, can use the nonaqueous electrolytic solution of this area routine.Can be selected from lithium hexafluoro phosphate (LiPF such as electrolyte lithium salt
6), in lithium perchlorate, LiBF4, hexafluoroarsenate lithium, lithium halide, chlorine lithium aluminate and the fluorocarbon based sulfonic acid lithium one or more.Organic solvent can be selected from chain acid esters and ring-type acid esters mixed solution, wherein the chain acid esters can be fluorine-containing for dimethyl carbonate (DMC), diethyl carbonate (DEC), methyl ethyl carbonate (EMC), carbonic acid first propyl ester (MPC), dipropyl carbonate (DPC) and other, sulfur-bearing or contain at least a in the chain organosilane ester of unsaturated bond.The ring-type acid esters can (γ-BL), sultone and other be fluorine-containing, sulfur-bearing or contain at least a in the ring-type organosilane ester of unsaturated bond for ethylene carbonate (EC), propene carbonate (PC), vinylene carbonate (VC), gamma-butyrolacton.In the described nonaqueous electrolytic solution, the concentration of electrolyte lithium salt is generally the 0.1-2 mol, is preferably the 0.8-1.2 mol.
Battery case and cathode pole piece 1, the method for winding of anode pole piece 3 and 1 layer of barrier film 2 between cathode pole piece 1 and anode pole piece 3 is conventionally known to one of skill in the art, does not repeat them here.
The following examples will the present invention will be further described.
Example 1
This example illustrates electrode label provided by the invention and lithium ion battery.
(1) preparation of anode pole piece
100 parts of weight positive active material LiCoO
2, 4 parts of weight bonding agent PVDF, 4 parts of weight conductive agent acetylene blacks join among 40 parts of weight NMP, in de-airing mixer, stir then and form dispersion anode sizing agent stable, homogeneous.This slurry is coated on the wide cut aluminium foil equably, and (wide is 800 millimeters, aluminum foil thickness is 0.200 millimeter) on, then, 120 ℃ of oven dry, to roll into thickness at the roller mill top roll be 0.145 millimeter pole piece, then, branch is cut to 371 * 43.5 * 0.145 millimeter anode pole piece on cutting machine.Anode pole piece contains positive active material LiCoO
26.4 gram.
(2) preparation of cathode pole piece
100 parts of weight negative electrode active material native graphites, 4 parts of weight bonding agent PTFE, 4 parts of weight conductive agent carbon blacks are joined among 40 parts of weight DMSO, add 0.3 part of weight fraction powder (polyisobutene succinimide: poly(ethylene oxide) ether=1: 1), in de-airing mixer, stir then and form dispersion cathode size A2 stable, homogeneous again.This slurry is coated on the wide cut Copper Foil equably, and (wide is 800 millimeters, copper thickness is 0.190 millimeter) on, then, 120 ℃ of oven dry, to roll into thickness at the roller mill top roll be 0.130 millimeter pole piece, then, branch is cut to 338 * 44.5 * 0.130 millimeter cathode pole piece on cutting machine.Cathode pole piece contains negative electrode active material graphite 2.7 grams.
(3) preparation of electrode label
Anode pole piece, cathode pole piece and the barrier film (polypropylene screen, thickness are 0.016 millimeter) of (1) and (2) preparation are wound into the electrode label according to the mode of Fig. 2, place in 4 * 34 * 49 millimeters the rectangular cell shell.Wherein, the anode plate outside coiling head end and first bending place are provided with 3 layers of barrier film (polypropylene screen, thickness are 0.016 millimeter).
(4) assembling of battery
With LiPF
6Be configured to LiPF with EC and DMC
6Concentration is the solution (volume ratio of EC/DMC is 1: 1) of 1 mol, obtains nonaqueous electrolytic solution.Inject above-mentioned nonaqueous electrolytic solution in the battery that (3) are obtained, lithium ion battery is made in sealing.Prepare 20000 same batteries altogether.
Example 2
This example illustrates electrode label provided by the invention and lithium ion battery.
Method according to example 1 prepares electrode label and lithium ion battery, and different just is provided with 3 layers of barrier film at the cathode pole piece outside coiling head end and first bending place, and the structure of electrode label as shown in Figure 3.Prepare 20000 same batteries altogether.
Example 3
This example illustrates electrode label provided by the invention and lithium ion battery.
Method according to example 1 prepares electrode label and lithium ion battery, and different just is provided with 3 layers of barrier film simultaneously in the coiling head end and first bending place in the cathode pole piece 1 and anode pole piece 3 outsides, and the structure of electrode label as shown in Figure 4.Prepare 20000 same batteries altogether.
Comparative Examples 1
The electrode label and the lithium ion battery of this Comparative Examples explanation prior art.
Method according to example 1 prepares electrode label and lithium ion battery, and different just only is provided with 1 layer of barrier film in the coiling head end and first bending place in anode pole piece 3 outsides, and the structure of electrode label as shown in Figure 1.Prepare 20000 same batteries altogether.
Example 4-6
Following example illustrates the short circuit ratio of battery provided by the invention.
Short circuit ratio to the battery of example 1-3 preparation is measured.Assay method then, is taken the battery that is short-circuited apart for to sort out the battery that is short-circuited in 20000 batteries with sorter, analyzes the reason that it is short-circuited, and obtains because burr punctures the number that barrier film causes the battery of internal short-circuit of battery.The result is as follows: the short circuit ratio of 20000 batteries of example 1 preparation is 0.2%; The short circuit ratio of 20000 batteries of example 2 preparations is 0.2%; The short circuit ratio of 20000 batteries of example 3 preparations is 0.1%.Wherein, short circuit ratio refer to since burr puncture the short circuit ratio that barrier film causes internal short-circuit of battery, promptly short circuit ratio=since burr puncture number/20000 that barrier film causes the battery of internal short-circuit of battery.
Comparative Examples 2
The short circuit ratio of this Comparative Examples explanation prior art battery.
The method of pressing example 4-6 is measured the short circuit ratio of 20000 batteries of Comparative Examples 1 preparation, and its short circuit ratio is 0.5%.
The result of example 4-6 and Comparative Examples 2 shows, battery provided by the invention causes the battery short circuit rate to cause the battery short circuit rate to reduce at least 60% than prior art battery owing to burr punctures barrier film because burr punctures barrier film, and battery provided by the invention causes the battery short circuit rate to reduce greatly than prior art owing to burr punctures barrier film.
Claims (6)
1, a kind of electrode label of lithium ion battery, this electrode label comprises the cathode pole piece (1) of reeling and forming, anode pole piece (3) and be positioned at cathode pole piece (1) and anode pole piece (3) between 1 layer of barrier film (2), inboard in anode pole piece (3), in anode pole piece (3) the coiling head end and first bending place, also be provided with at least 1 layer of barrier film (2) in addition, it is characterized in that, the coiling head end and first bending place in the outside of anode pole piece (3) and/or cathode pole piece (1) also are provided with at least 1 layer of barrier film (2) in addition.
2, electrode label according to claim 1 is characterized in that, the number of plies of described barrier film make the gross thickness of barrier film be burr height 0.7-2 doubly.
3, electrode label according to claim 2 is characterized in that, the number of plies of described barrier film make the gross thickness of barrier film be burr height 0.85-1.5 doubly.
4, electrode label according to claim 1 is characterized in that, is the 2-6 layer at the coiling head end in the anode pole piece (3) and/or cathode pole piece (1) outside and the number of plies of the barrier film (2) that first bending place is provided with in addition.
5, a kind of lithium ion battery, this battery comprises the electrode slice core, it is characterized in that, described electrode label is any described electrode label among the claim 1-4.
6, battery according to claim 5 is characterized in that, this battery also comprises nonaqueous electrolytic solution and battery case, and described nonaqueous electrolytic solution and described electrode label are sealed in the battery case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100021456A CN100429822C (en) | 2005-01-14 | 2005-01-14 | Electrode plate core of lithium ion cell and lithium ion cell with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100021456A CN100429822C (en) | 2005-01-14 | 2005-01-14 | Electrode plate core of lithium ion cell and lithium ion cell with the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1805205A true CN1805205A (en) | 2006-07-19 |
| CN100429822C CN100429822C (en) | 2008-10-29 |
Family
ID=36867111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100021456A Active CN100429822C (en) | 2005-01-14 | 2005-01-14 | Electrode plate core of lithium ion cell and lithium ion cell with the same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102130366A (en) * | 2010-01-14 | 2011-07-20 | 深圳市格瑞普电池有限公司 | Using method of columnar nickel and nickel-metal hydride battery diaphragm |
| CN103545471A (en) * | 2013-10-15 | 2014-01-29 | 东莞超霸电池有限公司 | Battery anode-cathode diaphragm, and preparation method and applications thereof |
| CN107394277A (en) * | 2017-07-26 | 2017-11-24 | 力信（江苏）能源科技有限责任公司 | A kind of core strueture for improving battery core acupuncture, impacting security performance |
| CN109216744A (en) * | 2017-06-29 | 2019-01-15 | 北京小米移动软件有限公司 | Battery core pole piece, battery core, battery and electronic equipment |
| WO2023010479A1 (en) * | 2021-08-05 | 2023-02-09 | 宁德时代新能源科技股份有限公司 | Electrode assembly and processing method and apparatus, battery cell, battery, and electrical apparatus |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1214479C (en) * | 1997-11-19 | 2005-08-10 | 三菱电机株式会社 | Lithium ion secondary battery and manufacture thereof |
| US6682853B2 (en) * | 2000-03-06 | 2004-01-27 | Sony Corporation | Nonaqueous electrolyte secondary battery and method of manufacturing the same |
| CN1438719A (en) * | 2003-01-24 | 2003-08-27 | 李鑫 | Lithium-ion electric core |
| CN2768220Y (en) * | 2005-01-14 | 2006-03-29 | 比亚迪股份有限公司 | Electrode core of lithium ion battery and lithium ion battery including the same |
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2005
- 2005-01-14 CN CNB2005100021456A patent/CN100429822C/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102130366A (en) * | 2010-01-14 | 2011-07-20 | 深圳市格瑞普电池有限公司 | Using method of columnar nickel and nickel-metal hydride battery diaphragm |
| CN102130366B (en) * | 2010-01-14 | 2013-05-01 | 深圳市格瑞普电池有限公司 | Using method of columnar nickel and nickel-metal hydride battery diaphragm |
| CN103545471A (en) * | 2013-10-15 | 2014-01-29 | 东莞超霸电池有限公司 | Battery anode-cathode diaphragm, and preparation method and applications thereof |
| CN103545471B (en) * | 2013-10-15 | 2016-01-13 | 东莞超霸电池有限公司 | A kind of battery plus-negative plate barrier film, preparation method and application |
| CN109216744A (en) * | 2017-06-29 | 2019-01-15 | 北京小米移动软件有限公司 | Battery core pole piece, battery core, battery and electronic equipment |
| CN107394277A (en) * | 2017-07-26 | 2017-11-24 | 力信（江苏）能源科技有限责任公司 | A kind of core strueture for improving battery core acupuncture, impacting security performance |
| WO2023010479A1 (en) * | 2021-08-05 | 2023-02-09 | 宁德时代新能源科技股份有限公司 | Electrode assembly and processing method and apparatus, battery cell, battery, and electrical apparatus |
| CN115799656A (en) * | 2021-09-10 | 2023-03-14 | 宁德时代新能源科技股份有限公司 | Electrode assembly, and battery cell, battery, device and manufacturing method related thereto |
| WO2023035668A1 (en) * | 2021-09-10 | 2023-03-16 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery, and electrical device |
| WO2023035669A1 (en) * | 2021-09-10 | 2023-03-16 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery, and electric apparatus |
| CN116114115A (en) * | 2021-09-10 | 2023-05-12 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electricity utilization device |
| CN115799656B (en) * | 2021-09-10 | 2023-12-15 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery, device and manufacturing method related to electrode assembly |
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| Publication number | Publication date |
|---|---|
| CN100429822C (en) | 2008-10-29 |
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