CN101188311B - A novel lithium Fe battery and its making technology - Google Patents
A novel lithium Fe battery and its making technology Download PDFInfo
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- CN101188311B CN101188311B CN2007100307274A CN200710030727A CN101188311B CN 101188311 B CN101188311 B CN 101188311B CN 2007100307274 A CN2007100307274 A CN 2007100307274A CN 200710030727 A CN200710030727 A CN 200710030727A CN 101188311 B CN101188311 B CN 101188311B
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- battery
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- negative pole
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- 229910052744 lithium Inorganic materials 0.000 title claims description 23
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims description 18
- 238000005516 engineering process Methods 0.000 title description 3
- 239000011149 active material Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 239000011159 matrix material Substances 0.000 claims description 20
- 230000004888 barrier function Effects 0.000 claims description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229940095991 ferrous disulfide Drugs 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 229910000733 Li alloy Inorganic materials 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 5
- 239000001989 lithium alloy Substances 0.000 claims description 5
- 238000007747 plating Methods 0.000 claims description 4
- 239000002482 conductive additive Substances 0.000 claims description 3
- 239000006258 conductive agent Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 239000005486 organic electrolyte Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- 239000005030 aluminium foil Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- -1 pyrrole alkane ketone Chemical class 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- OWBTYPJTUOEWEK-UHFFFAOYSA-N butane-2,3-diol Chemical compound CC(O)C(C)O OWBTYPJTUOEWEK-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- BTVWZWFKMIUSGS-UHFFFAOYSA-N dimethylethyleneglycol Natural products CC(C)(O)CO BTVWZWFKMIUSGS-UHFFFAOYSA-N 0.000 description 2
- 150000004862 dioxolanes Chemical class 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- KAESVJOAVNADME-UHFFFAOYSA-N 1H-pyrrole Natural products C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 1
- ZPOLNCDBPYJDSE-UHFFFAOYSA-N 3-[4-[bis(2-chloroethyl)amino]phenyl]-2-formamidopropanoic acid Chemical compound O=CNC(C(=O)O)CC1=CC=C(N(CCCl)CCCl)C=C1 ZPOLNCDBPYJDSE-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Chemical compound [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Images
Classifications
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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
Abstract
The invention relates to a novel lithium-iron battery and the manufacture process thereof, and belongs to the field of batteries. A septum is arranged between an anode and a cathode, and the outermost ring of a pole assembly is of the anode. The cathode is packed inside the pole assembly. The anode is characterized in that the both sides of a metal ribbon material basal body are overlaid with active materials, one section of the metal basal body is not overlaid along an axis, and the length without overlay is 1-25percent of the length of the metal basal body. One side without overlay of the basal body at the end of the anode is directly contacted with a shell. A cathode liquid collecting body is welded with a nut cap, and an opening is sealed to form molding. The invention has simple process, reduced welding working procedure of the anode and easy control and operation. An anode liquid collecting body is directly contacted with the shell, and the safe hidden trouble caused by the elevation of the temperature at the inner part of the lithium-iron battery is reduced. The direct contact area of the anode and the shell is increased; the electrical conductivity is strengthened; the dosage of the cathode is reduced; the safe hidden trouble caused by the incomplete reaction of the cathode is avoided.
Description
Technical field
A kind of lithium Fe battery of the present invention and manufacture craft thereof belong to field of batteries, particularly relate to a kind of manufacture craft of lithium Fe battery.
Background technology
The positive plate of lithium Fe battery, welds with outer casing bottom behind the sticking lug of negative terminal surface by the lug and the loam cake welding of welding.Not only will weld repeatedly, and the lug that welds on the positive plate generally adopts materials such as nickel-plated steel, stainless iron, have problems such as the spot welding of weld burn into is not firm; In addition, the negative lug weldering needs capillary to go deep into battery bottom spot welding during the end, causes problems such as internal short-circuit of battery or micro-short circuit easily.In addition, also there is following shortcoming in conventional lithium Fe battery:
1) positive pole of conventional lithium Fe battery is by soldering polar ear and the welding of anodal combination cover cap, and not only complex process, and contact-making surface is little, and conductivity, poor thermal conductivity are unfavorable for the inside battery heat radiation, and during battery discharge, discharge voltage plateau is on the low side;
2) usually behind coiling and molding, the outermost afterbody of lithium Fe battery utmost point group is a cathode of lithium, and positive pole is wrapped in the utmost point group.After battery discharge was complete, the cathode of lithium of outmost turns failed to react owing to there is not anodal its correspondence of following, and residue is arranged, and is unfavorable for cell safety.
Summary of the invention
The objective of the invention is to avoid weak point of the prior art and to propose a kind of manufacturing approach craft simple, cell safety is reliable, can prepare capacity height, heavy-current discharge performance is good, fail safe is good lithium Fe battery.
Purpose of the present invention reaches by following measure: lithium Fe battery is by negative pole, anodal, non-water organic electrolyte is formed, anodal is active material with the ferrous disulfide, negative pole is an active material with the lithium metal or the lithium alloy of paper tinsel shape, battery case is thick aluminum hull of 0.1mm～0.5mm or nickel plating box hat, barrier film just is placed on, between the negative pole, barrier film with just, negative pole is rolled into tubular together, and both positive and negative polarity isolated, utmost point group outmost turns is anodal, negative pole is wrapped in utmost point group inside, positive pole is to apply active material on the matrix of metal band-shaped material, metallic matrix does not apply along one section single face of long axis, the one side that does not apply is wound on the outmost turns of utmost point group, and the length that does not apply is 1%～25% of metallic matrix length.The anodal metal band-shaped material that adopts comprises aluminium foil, Copper Foil, aluminium net, copper mesh etc.Direct and the housing contacts of a side that positive plate is uncoated, its battery case is again the plus plate current-collecting body of battery simultaneously, negative current collector and block welding seal moulding.Battery seal ring and negative cover are combined and are made the battery cathode block, weld together directly anodal and housing contacts with negative current collector.
Manufacture craft of the present invention:
1, after above ferrous disulfide active material, binding agent, the conductive agent of anodal particle diameter 100 orders of making mixes, be coated on a kind of strip metal material matrix, one section single face of base end does not apply, behind the dry removal solvent, be cut into suitable dimensions and roll make solid powder material firm attached on the matrix, as the anode pole piece of battery.
2, negative pole is an active material with the lithium metal or the lithium alloy of paper tinsel shape, and the content of lithium metal is not less than 95% in the lithium alloy.
3, battery case is thick aluminum hull of 0.1mm～0.5mm or nickel plating box hat.
4, barrier film is placed between the positive and negative electrode, barrier film is rolled into tubular with positive and negative electrode, and both positive and negative polarity isolated, utmost point group outmost turns is anodal, negative pole is wrapped in utmost point group inside, the direct and housing contacts of the anodal terminal uncoated side of utmost point group outmost turns, battery case is the plus plate current-collecting body of battery, negative current collector and block welding seal moulding.
Binding agent and conductive agent are to adopt to make in the lithium Fe battery prior art to use.
The present invention has following outstanding feature: technology is simple, reduced anodal welding sequence, control and operation easily, plus plate current-collecting body directly contacts with shell, thermal conductivity strengthens, help the inside battery heat radiation, reduced because the potential safety hazard that internal temperature of battery rises and causes, anodal amassing with the shell direct contact surface increases, conductivity strengthens, and the battery discharge voltage platform improves, and has reduced the negative pole consumption under the prerequisite that does not reduce battery capacity, the negative pole cost reduces by 10%, the potential safety hazard of having avoided negative reaction not exclusively to cause.
Description of drawings
Accompanying drawing 1 is the generalized section of battery structure of the present invention.
Accompanying drawing 2 is schematic cross section of battery utmost point group of the present invention.
Accompanying drawing 3 is battery anode slice generalized sections of the present invention.
Accompanying drawing 4 is the embodiment of the invention and Comparative Examples battery discharge curve.
Accompanying drawing 5 is surface temperature curves in the embodiment of the invention and the Comparative Examples battery discharge procedure.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As accompanying drawing 1, accompanying drawing 2, shown in the accompanying drawing 3, lithium Fe battery of the present invention is by negative cover 1, semistor (PTC) 2, battery seal ring 3, battery case 4, negative current collector 5, pad 6, negative pole 7, barrier film 8, anodal 9, pad 10 is formed, battery case 4 is the metal aluminum hull, battery case is thick aluminum hull of 0.1mm～0.5mm or nickel plating box hat, anodal is active material with the ferrous disulfide, positive pole is to apply active material on the matrix of metal band-shaped material, metallic matrix does not apply along one section single face of long axis, and the length that metallic matrix does not apply is 1%～25% of metallic matrix length.Direct and the housing contacts of an anodal terminal uncoated side, battery case is again the plus plate current-collecting body of battery simultaneously, negative pole is an active material with the lithium metal or the lithium alloy of paper tinsel shape, barrier film just is placed on, between the negative pole, barrier film with just, negative pole is rolled into tubular together, and both positive and negative polarity isolated, utmost point group outmost turns is anodal, negative pole is wrapped in utmost point group inside, battery seal ring and negative cover are combined and are made the battery cathode block, weld together with negative current collector, negative current collector and block welding, the anodal end 9 that applied is relative with the negative pole 7 of inner ring, and the uncoated collector 11 of anodal afterbody is wrapped in the battery outmost turns, and 11 do not apply the direct and housing contacts of terminal 9a of a side fully with positive pole.
The ratio of active material ferrous disulfide powder is 60%～99% in the positive pole, binding agent 0.5%～20%, conductive additive 0.5%～20%.Metallic matrix does not apply along one section single face of long axis, and the length that does not apply is 1%～25% of metallic matrix length.The metal band-shaped material that plus plate current-collecting body adopts comprises aluminium foil, Copper Foil, aluminium net, copper mesh etc.Collector and block welding that the direct and housing contacts of anodal uncoated part, its negative terminal surface are glued materials such as nickel plated steel strip, nickel strap seal moulding.
Embodiment:
The anodal powder particle of ferrous disulfide is crossed 325 order 100g, PVDF Kynoar 6g, conductive additive carbon black 6g, add n-formyl sarcolysine base pyrrole alkane ketone (NMP) and be uniformly dispersed with de-airing mixer, the viscosity that makes slurry is about 5000cps.Scattered positive active material slurry is coated on the aluminium foil, and one section single face of aluminium foil does not apply.Dry remove solvent after, be cut into suitable dimensions and roll make solid powder material firm attached on the aluminium foil, as the anode pole piece of battery.Anode pole piece size (mm): 280 * 40; A coated portion size (mm) wherein: 250 * 40; Another side coated portion size (mm): 280 * 40.
After anode pole piece passes through the dry moisture of also removing fully wherein, putting into relative humidity is lower than under 3% the environment, be ready to the metal lithium bands of suitable dimension, and in the middle of metal lithium bands and anode pole piece, insert and play the barrier film that separates the both positive and negative polarity effect, be wound into columned utmost point group, an anodal uncoated side twists in the end of utmost point group outmost turns.Barrier film can adopt polypropylene, polyethylene/polypropylene porous film usually.The electric core of winding is put into aluminum hull, injects electrolyte, seals behind the negative current collector weldering lid.In its fluid injection process, what added is dioxolanes (DOL) and the dimethyl ethylene glycol (DME) that non-aqueous solution electrolysis liquid consists of 1mol/L lithium iodide (LiI).Comparative Examples:
Other steps are consistent with embodiment, and aluminium foil all is coated with and is covered with the positive active material slurry, anode pole piece size (mm): 280 * 40; Anodal coated on both sides portion size (mm): 280 * 40.
The electric core of winding is put into box hat, and negative lug and box hat inject electrolyte in interior welds, seals behind the positive pole ear welding block.
As shown in Figure 3, be embodiment and Comparative Examples battery discharge curve, discharge system is that the 2000mA constant-current discharge is to 0.8V.The longitudinal axis is represented cell voltage, and transverse axis is represented discharge time.
As shown in Figure 4, be embodiment and Comparative Examples battery under the 2000mA electric current in the discharge process, the battery surface temperature curve.The longitudinal axis is represented the battery surface temperature, and transverse axis is represented discharge time.
Claims (2)
1. lithium Fe battery, by negative pole, anodal, non-water organic electrolyte is formed, barrier film just is placed on, between the negative pole, barrier film with just, negative pole is rolled into tubular together, and both positive and negative polarity isolated, it is characterized in that utmost point group outmost turns is for anodal, negative pole is wrapped in utmost point group inside, positive pole is to apply active material on the matrix of metal band-shaped material, metallic matrix does not apply along one section single face of long axis, an anodal terminal uncoated side twists in the outmost turns of utmost point group, direct and housing contacts, and the length that metallic matrix does not apply is 1%～25% of metallic matrix length, the side that anodal afterbody applies fully is relative with the negative pole of inner ring, the uncoated side of anodal afterbody collector is wrapped in utmost point group outmost turns, and battery seal ring and negative cover are combined and made block, weld together with negative current collector.
2. lithium Fe battery manufacture craft, the ferrous disulfide active material, binding agent, after conductive agent mixes, be coated on a kind of metal band-shaped material matrix, behind the dry removal solvent, be cut into suitable dimensions and roll make solid powder material firm attached on the matrix, anode pole piece as battery, negative pole is an active material with the lithium metal or the lithium alloy of paper tinsel shape, battery case is thick aluminum hull of 0.1mm～0.5mm or nickel plating box hat, barrier film just is placed on, between the negative pole, barrier film with just, negative pole is rolled into tubular together, and both positive and negative polarity isolated, it is characterized in that the metal band-shaped material matrix does not apply along one section single face of long axis, utmost point group outmost turns is anodal, negative pole is wrapped in utmost point group inside, direct and the housing contacts of anodal terminal uncoated collector, battery case is the plus plate current-collecting body of battery, negative current collector and block welding, seal moulding, the length that metallic matrix does not apply is 1%～25% of metallic matrix length, and the uncoated collector of anodal afterbody is wrapped in utmost point group outmost turns, and the ratio of active material ferrous disulfide powder is 60%～99% in the positive pole, binding agent 0.5%～20%, conductive additive 0.5%～20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100307274A CN101188311B (en) | 2007-09-30 | 2007-09-30 | A novel lithium Fe battery and its making technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100307274A CN101188311B (en) | 2007-09-30 | 2007-09-30 | A novel lithium Fe battery and its making technology |
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| Publication Number | Publication Date |
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| CN101188311A CN101188311A (en) | 2008-05-28 |
| CN101188311B true CN101188311B (en) | 2010-09-22 |
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| WO2022177379A1 (en) * | 2021-02-19 | 2022-08-25 | 주식회사 엘지에너지솔루션 | Battery, and battery pack and vehicle comprising same |
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| KR101763961B1 (en) | 2009-10-14 | 2017-08-01 | 에버레디 배터리 컴퍼니, 인크. | Lithium-iron disulfide cell design |
| CN101800295A (en) * | 2010-04-16 | 2010-08-11 | 沧州荣泰新能源科技有限公司 | Plastic shell of power lithium battery with blocking seal groove on upper cover |
| WO2012111061A1 (en) | 2011-02-16 | 2012-08-23 | パナソニック株式会社 | Battery and method for manufacturing battery |
| JP6220396B2 (en) * | 2013-05-23 | 2017-10-25 | エルジー・ケム・リミテッド | Method for manufacturing electrode assembly |
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| US20190067648A1 (en) * | 2017-08-31 | 2019-02-28 | Nio Usa, Inc. | Battery cell with aluminium case |
| CN107978820A (en) * | 2017-11-21 | 2018-05-01 | 中山市电赢科技有限公司 | A kind of method for improving soft bag lithium ionic cell heat dissipation |
| CN109860498A (en) * | 2019-01-18 | 2019-06-07 | 重庆市紫建电子有限公司 | A kind of pole ear welding method of metal housing battery |
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| US6051333A (en) * | 1995-11-08 | 2000-04-18 | Hitachi Maxell, Ltd. | Cell comprising spirally wound electrodes |
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| WO2022177379A1 (en) * | 2021-02-19 | 2022-08-25 | 주식회사 엘지에너지솔루션 | Battery, and battery pack and vehicle comprising same |
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| CN101188311A (en) | 2008-05-28 |
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