CN110416443A - 一种不易折损的锂电芯及其生产方法 - Google Patents
一种不易折损的锂电芯及其生产方法 Download PDFInfo
- Publication number
- CN110416443A CN110416443A CN201910699314.8A CN201910699314A CN110416443A CN 110416443 A CN110416443 A CN 110416443A CN 201910699314 A CN201910699314 A CN 201910699314A CN 110416443 A CN110416443 A CN 110416443A
- Authority
- CN
- China
- Prior art keywords
- film layer
- lithium cell
- stiffener
- bracket
- support bar
- 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
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 73
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000010408 film Substances 0.000 claims abstract description 68
- 239000003351 stiffener Substances 0.000 claims abstract description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- -1 polyethylene Polymers 0.000 claims abstract description 20
- 239000004698 Polyethylene Substances 0.000 claims abstract description 17
- 239000005030 aluminium foil Substances 0.000 claims abstract description 17
- 229920000573 polyethylene Polymers 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000000853 adhesive Substances 0.000 claims abstract description 13
- 230000001070 adhesive effect Effects 0.000 claims abstract description 13
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 13
- 239000010409 thin film Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 10
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 9
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 9
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 9
- 239000010453 quartz Substances 0.000 claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052709 silver Inorganic materials 0.000 claims abstract description 9
- 239000004332 silver Substances 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 239000004519 grease Substances 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000007773 negative electrode material Substances 0.000 claims description 8
- 229920001296 polysiloxane Polymers 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 239000004677 Nylon Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000011889 copper foil Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 239000003792 electrolyte Substances 0.000 claims description 6
- 229920001778 nylon Polymers 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000007774 positive electrode material Substances 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000004800 polyvinyl chloride Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- 229910052493 LiFePO4 Inorganic materials 0.000 claims description 3
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000009954 braiding Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 239000000356 contaminant Substances 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 3
- 238000007591 painting process Methods 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 238000004537 pulping Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 229920001610 polycaprolactone Polymers 0.000 claims description 2
- 239000004632 polycaprolactone Substances 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 238000011017 operating method Methods 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 abstract description 3
- 230000013011 mating Effects 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 210000004027 cell Anatomy 0.000 description 47
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 210000000795 conjunctiva Anatomy 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/10—Presence of inorganic materials
- C09J2400/16—Metal
- C09J2400/163—Metal in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
- C09J2483/006—Presence of polysiloxane in the substrate
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Secondary Cells (AREA)
- Primary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
本发明公开了一种不易折损的锂电芯及其生产方法,包括锂电芯本体,所述锂电芯本体上固定连接有防护膜层,所述防护膜层由内至外依次包括聚乙烯粘结膜层、铝箔膜层和硅橡胶薄膜层,所述加强条上固定包覆有紧固条。本发明通过防护膜层有效避免了漏液现象,绝缘性能好、耐磨、耐压和耐折性保护,并且通过加强条、支撑条和紧固条形成十字型骨架结构以及网状结构进行防护,增强了外部防护作用效果,通过碳纳米管导电剂、液体端羧基丁腈橡胶、镀银石英粉和粘合剂的配合作用,有效增强锂电芯内部正负极材料的导电性能、粘合性、韧性,正负极材料不易出现折纹、分裂和破损现象,性能更为稳定,进而实现对锂电芯本体内外结合的防折损性能保护。
Description
技术领域
本发明属于锂电池技术领域,具体涉及一种不易折损的锂电芯及其生产方法。
背景技术
锂电芯的质量直接决定了锂电池的质量,锂电芯的生产流程中,往往先制备出正负电极材料,进行涂布工序制成极片,现有技术中制备出的极片,在后续进行分切和绕包工序中正负电极材料易出现分裂、折损破碎的现象,影响了加工质量和效率,处理起来也十分繁琐,并且封装好后的锂电芯还要进行后续加工,其外部结构单一防护效果差,遇到意外受力情况,易出现折弯、折断等折损现象,因此,急需对锂电芯进行改进。
发明内容
本发明的目的在于提供一种不易折损的锂电芯及其生产方法,以解决上述背景技术中提出的问题。
为实现上述目的,本发明提供如下技术方案:一种不易折损的锂电芯,包括锂电芯本体,所述锂电芯本体上固定连接有防护膜层,所述防护膜层由内至外依次包括聚乙烯粘结膜层、铝箔膜层和硅橡胶薄膜层,所述聚乙烯粘结膜层粘接在锂电芯本体上,所述防护膜层上粘接固定有均匀分布的加强条,所述加强条上固定包覆有紧固条。
优选的,所述加强条之间固定连接有交错分布的支撑条,所述支撑条之间呈网状结构设置。
优选的,所述支撑条、加强条和紧固条上均涂覆有一层导热硅脂层。
优选的,所述紧固条至少设有四条且均匀的包裹在防护膜层上。
同时,本发明还公开了一种不易折损的锂电芯的生产方法,具体包括如下操作步骤:
S1:原料准备,磷酸铁锂40-90份、粘合剂20-50份、碳纳米管导电剂20-40、石墨碳粉40-90份、铝箔、铜箔、隔膜、液体端羧基丁腈橡胶10-15份、镀银石英粉5-20份、有机溶剂20-50份、钢片、PVC、尼龙、硅橡胶薄膜层201、铝箔膜层202、聚乙烯粘结膜层203、导热硅脂;
S2:搅拌制浆,把粘合剂、碳纳米管导电剂、液体端羧基丁腈橡胶、镀银石英粉、有机溶剂分别与磷酸铁锂和石墨碳粉放入混合罐中,并使用真空搅拌机进行搅拌呈浆状,搅拌时间为8-12小时、搅拌温度为100-200摄氏度、然后把浆状的混合物静置1-5小时,制成正极材料和负极材料;
S3:涂布工序,使用涂布机将正极材料和负极材料分别均匀的涂抹到铝箔和铜箔上,并送入烘箱内进行干燥;
S4:冷压分切,将极片送入碾压车间中,使用碾压辊将附着正负极材料的极片进行冷压,让材料之间更为紧密、提升能量密度,冷压后;根据需要的尺寸对极片进行分切,并使用打磨机打磨极片边部的毛刺,再使用模切机切割出正负极的导电极耳;
S5:卷绕成型,将正极片、负极片和隔膜放置在全自动卷包机上进行卷绕,隔膜把正负极片进行隔离,并使用CCD视觉检测设备可实现自动检测及自动纠偏,确保电芯极片不错位;
S6:制备防护膜层,将硅橡胶薄膜层、铝箔膜层和聚乙烯粘结膜层之间粘接固定制成防护膜层,然后使用冲压模具在防护膜层上冲压出能够包裹锂电芯本体的冲坑,并根据锂电芯本体的尺寸裁剪成型;
S7:封装固定,将锂电芯本体放入防护膜的冲坑中,并使用顶封、侧封机进行封装,即使得聚乙烯粘结膜层粘结在锂电芯本体上进行固定;
S8:烘干注液,将锂电芯本体1放入干燥房中静置6-10小时,烘干电芯内部的水分至达标,再往电芯内部注入电解液并进行预封,此时再将锂电芯本体静置;
S9:化成检测,通过充放电使电芯内部发生化学反应形成SEI膜,同时进行X-ray监测、绝缘监测、焊接监测、容量测试,对电芯进行激活后,第二次灌注电解液、称重、注液口焊接、气密性检测,自放电测试高温老化以及静置,保证了产品性能;
S10:制作加强条、支撑条和紧固条,把钢片放在切割机上切割成条状制成加强条,使用成型机把PVC塑形成圆杆状制成支撑条,把尼龙编织成带状制成紧固条;
S11:清理并涂覆,把加强条、支撑条和紧固条放入清洗机设备中清洗干净并烘干,去除其表面油污,然后把导热硅脂均匀的涂覆在加强条、支撑条和紧固条的表面;
S12:装配,把加强条呈纵向粘接固定在防护膜层上,再使用卷绕机把紧固条呈横向绕包在防护膜层上,最后把支撑条呈网状交叉结构粘接固定在加强条之间,装配完成后静置1-3小时即可。
优选的,所述步骤S1中粘合剂是由醋酸乙烯、酚醛树脂、碳酸氢钠、低分子聚酯、低分子聚碳橡胶混合制备而成。
优选的,所述步骤S3中烘箱内部的温度为80-145摄氏度。
优选的,所述步骤S11中导热硅脂的厚度为2-5毫米。
本发明的技术效果和优点:
本发明通过防护膜层对锂电芯本体外表面进行包裹式防护,有效避免了漏液现象、绝缘性能好,同时硅橡胶薄膜层对其进行耐磨、耐压和耐折性保护,并且通过加强条、支撑条和紧固条对锂电芯本体的外表面形成十字型骨架结构以及网状结构进行防护,有效增强了其外部的韧度和强度,从而增强了防护作用效果,同时,通过碳纳米管导电剂、液体端羧基丁腈橡胶、镀银石英粉和粘合剂的配合作用,有效增强锂电芯内部正负极材料的导电性能、粘合性、韧性及耐温性,当对极片进行分切、冷压和绕包工序中,使得极片上的正负极材料不易出现折纹、分裂和破损现象,性能更为稳定,进而实现对锂电芯本体内外结合的防折损性能保护,有效保证了锂电芯本体的质量,以及大大提高了工作效率。
附图说明
图1为本发明一种不易折损的锂电芯的结构示意图;
图2为本发明一种不易折损的锂电芯的俯视结构示意图;
图3为本发明一种不易折损的锂电芯的防护膜内部结构示意图。
图中:1、锂电芯本体;2、防护膜层;201、硅橡胶薄膜层;202、铝箔膜层;203、聚乙烯粘结膜层;3、加强条;4、支撑条;5、紧固条。
具体实施方式
下面将结合本发明实施例,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
如图1-3所示,一种不易折损的锂电芯,包括锂电芯本体1,所述锂电芯本体1上固定连接有防护膜层2,所述防护膜层2由内至外依次包括聚乙烯粘结膜层203、铝箔膜层202和硅橡胶薄膜层201,所述聚乙烯粘结膜层203粘接在锂电芯本体1上,所述防护膜层2上粘接固定有均匀分布的加强条3,所述加强条3上固定包覆有紧固条5。
所述加强条3之间固定连接有交错分布的支撑条4,所述支撑条4之间呈网状结构设置;便于对加强条3之间的连接强度进行加固,并且便于对锂电芯本体1的外表面形成网状膜层,增强了其防护作用效果。
所述支撑条4、加强条3和紧固条5上均涂覆有一层导热硅脂层;便于对锂电芯本体1进行散热,便于延长其使用寿命。
所述紧固条5至少设有四条且均匀的包裹在防护膜层2上;便于对锂电芯本体1的外部进行裹紧包覆,并且与加强条3构成十字形骨架结构对锂电芯本体1的外表面进行防护,有效增强了锂电芯本体1的抗折弯折损性能防护。
同时,本发明还公开了一种不易折损的锂电芯的生产方法,具体包括如下操作步骤:
S1:原料准备,磷酸铁锂60份、粘合剂25份、碳纳米管导电剂20、石墨碳粉20份、铝箔、铜箔、隔膜、液体端羧基丁腈橡胶10份、镀银石英粉5份、有机溶剂20份、钢片、PVC、尼龙、硅橡胶薄膜层201、铝箔膜层202、聚乙烯粘结膜层203、导热硅脂;
S2:搅拌制浆,把粘合剂、碳纳米管导电剂、液体端羧基丁腈橡胶、镀银石英粉、有机溶剂分别与磷酸铁锂和石墨碳粉放入混合罐中,并使用真空搅拌机进行搅拌呈浆状,搅拌时间为8小时、搅拌温度为100摄氏度、然后把浆状的混合物静置1小时,制成正极材料和负极材料;
S3:涂布工序,使用涂布机将正极材料和负极材料分别均匀的涂抹到铝箔和铜箔上,并送入烘箱内进行干燥;
S4:冷压分切,将极片送入碾压车间中,使用碾压辊将附着正负极材料的极片进行冷压,让材料之间更为紧密、提升能量密度,冷压后;根据需要的尺寸对极片进行分切,并使用打磨机打磨极片边部的毛刺,再使用模切机切割出正负极的导电极耳;
S5:卷绕成型,将正极片、负极片和隔膜放置在全自动卷包机上进行卷绕,隔膜把正负极片进行隔离,并使用CCD视觉检测设备可实现自动检测及自动纠偏,确保电芯极片不错位;
S6:制备防护膜层2,将硅橡胶薄膜层201、铝箔膜层202和聚乙烯粘结膜层203之间粘接固定制成防护膜层2,然后使用冲压模具在防护膜层2上冲压出能够包裹锂电芯本体1的冲坑,并根据锂电芯本体1的尺寸裁剪成型;
S7:封装固定,将锂电芯本体1放入防护膜的冲坑中,并使用顶封、侧封机进行封装,即使得聚乙烯粘结膜层203粘结在锂电芯本体1上进行固定;
S8:烘干注液,将锂电芯本体1放入干燥房中静置6小时,烘干电芯内部的水分至达标,再往电芯内部注入电解液并进行预封,此时再将锂电芯本体1静置;
S9:化成检测,通过充放电使电芯内部发生化学反应形成SEI膜,同时进行X-ray监测、绝缘监测、焊接监测、容量测试,对电芯进行激活后,第二次灌注电解液、称重、注液口焊接、气密性检测,自放电测试高温老化以及静置,保证了产品性能;
S10:制作加强条3、支撑条4和紧固条5,把钢片放在切割机上切割成条状制成加强条3,使用成型机把PVC塑形成圆杆状制成支撑条4,把尼龙编织成带状制成紧固条5;
S11:清理并涂覆,把加强条3、支撑条4和紧固条5放入清洗机设备中清洗干净并烘干,去除其表面油污,然后把导热硅脂均匀的涂覆在加强条3、支撑条4和紧固条5的表面;
S12:装配,把加强条3呈纵向粘接固定在防护膜层2上,再使用卷绕机把紧固条5呈横向绕包在防护膜层2上,最后把支撑条4呈网状交叉结构粘接固定在加强条3之间,装配完成后静置2小时即可。
所述步骤S1中粘合剂是由醋酸乙烯、酚醛树脂、碳酸氢钠、低分子聚酯、低分子聚碳橡胶混合制备而成;使得粘合剂的凝固点低、化学稳定性高、抗氧化和抗高温性能好,从而便于电极材料之间连接更为紧密,性能更加稳定,避免出现液体渗漏、溢出的情况出现。
所述步骤S3中烘箱内部的温度为100摄氏度。
所述步骤S11中导热硅脂的厚度为3毫米。
本发明通过防护膜层2对锂电芯本体1外表面进行包裹式防护,有效避免了漏液现象、绝缘性能好,同时硅橡胶薄膜层201对其进行耐磨、耐压和耐折性保护,并且通过加强条3、支撑条4和紧固条5对锂电芯本体1的外表面形成十字型骨架结构以及网状结构进行防护,有效增强了其外部的韧度和强度,从而增强了防护作用效果,同时,通过碳纳米管导电剂、液体端羧基丁腈橡胶、镀银石英粉和粘合剂的配合作用,有效增强锂电芯内部正负极材料的导电性能、粘合性、韧性及耐温性,当对极片进行分切、冷压和绕包工序中,使得极片上的正负极材料不易出现折纹、分裂和破损现象,性能更为稳定,进而实现对锂电芯本体1内外结合的防折损性能保护,有效保证了锂电芯本体1的质量,以及大大提高了工作效率。
最后应说明的是:以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (8)
1.一种不易折损的锂电芯,包括锂电芯本体(1),其特征在于:所述锂电芯本体(1)上固定连接有防护膜层(2),所述防护膜层(2)由内至外依次包括聚乙烯粘结膜层(203)、铝箔膜层(202)和硅橡胶薄膜层(201),所述聚乙烯粘结膜层(203)粘接在锂电芯本体(1)上,所述防护膜层(2)上粘接固定有均匀分布的加强条(3),所述加强条(3)上固定包覆有紧固条(5)。
2.根据权利要求1所述的一种不易折损的锂电芯,其特征在于:所述加强条(3)之间固定连接有交错分布的支撑条(4),所述支撑条(4)之间呈网状结构设置。
3.根据权利要求2所述的一种不易折损的锂电芯,其特征在于:所述支撑条(4)、加强条(3)和紧固条(5)上均涂覆有一层导热硅脂层。
4.根据权利要求1所述的一种不易折损的锂电芯,其特征在于:所述紧固条(5)至少设有四条且均匀的包裹在防护膜层(2)上。
5.一种根据权利要求1-4任意一项所述的不易折损的锂电芯的生产方法,其特征在于:包括如下操作步骤:
S1:原料准备,磷酸铁锂40-90份、粘合剂20-50份、碳纳米管导电剂20-40、石墨碳粉40-90份、铝箔、铜箔、隔膜、液体端羧基丁腈橡胶10-15份、镀银石英粉5-20份、有机溶剂20-50份、钢片、PVC、尼龙、硅橡胶薄膜层(201)、铝箔膜层(202)、聚乙烯粘结膜层(203)、导热硅脂;
S2:搅拌制浆,把粘合剂、碳纳米管导电剂、液体端羧基丁腈橡胶、镀银石英粉、有机溶剂分别与磷酸铁锂和石墨碳粉放入混合罐中,并使用真空搅拌机进行搅拌呈浆状,搅拌时间为8-12小时、搅拌温度为100-200摄氏度、然后把浆状的混合物静置1-5小时,制成正极材料和负极材料;
S3:涂布工序,使用涂布机将正极材料和负极材料分别均匀的涂抹到铝箔和铜箔上,并送入烘箱内进行干燥;
S4:冷压分切,将极片送入碾压车间中,使用碾压辊将附着正负极材料的极片进行冷压,让材料之间更为紧密、提升能量密度,冷压后;根据需要的尺寸对极片进行分切,并使用打磨机打磨极片边部的毛刺,再使用模切机切割出正负极的导电极耳;
S5:卷绕成型,将正极片、负极片和隔膜放置在全自动卷包机上进行卷绕,隔膜把正负极片进行隔离,并使用CCD视觉检测设备可实现自动检测及自动纠偏,确保电芯极片不错位;
S6:制备防护膜层(2),将硅橡胶薄膜层(201)、铝箔膜层(202)和聚乙烯粘结膜层(203)之间粘接固定制成防护膜层(2),然后使用冲压模具在防护膜层(2)上冲压出能够包裹锂电芯本体(1)的冲坑,并根据锂电芯本体(1)的尺寸裁剪成型;
S7:封装固定,将锂电芯本体(1)放入防护膜的冲坑中,并使用顶封、侧封机进行封装,即使得聚乙烯粘结膜层(203)粘结在锂电芯本体(1)上进行固定;
S8:烘干注液,将锂电芯本体(1)放入干燥房中静置6-10小时,烘干电芯内部的水分至达标,再往电芯内部注入电解液并进行预封,此时再将锂电芯本体(1)静置;
S9:化成检测,通过充放电使电芯内部发生化学反应形成SEI膜,同时进行X-ray监测、绝缘监测、焊接监测、容量测试,对电芯进行激活后,第二次灌注电解液、称重、注液口焊接、气密性检测,自放电测试高温老化以及静置,保证了产品性能;
S10:制作加强条(3)、支撑条(4)和紧固条(5),把钢片放在切割机上切割成条状制成加强条(3),使用成型机把PVC塑形成圆杆状制成支撑条(4),把尼龙编织成带状制成紧固条(5);
S11:清理并涂覆,把加强条(3)、支撑条(4)和紧固条(5)放入清洗机设备中清洗干净并烘干,去除其表面油污,然后把导热硅脂均匀的涂覆在加强条(3)、支撑条(4)和紧固条(5)的表面;
S12:装配,把加强条(3)呈纵向粘接固定在防护膜层(2)上,再使用卷绕机把紧固条(5)呈横向绕包在防护膜层(2)上,最后把支撑条(4)呈网状交叉结构粘接固定在加强条(3)之间,装配完成后静置1-3小时即可。
6.根据权利要求5所述的一种不易折损的锂电芯的生产方法,其特征在于:所述步骤S1中粘合剂是由醋酸乙烯、酚醛树脂、碳酸氢钠、低分子聚酯、低分子聚碳橡胶混合制备而成。
7.根据权利要求5所述的一种不易折损的锂电芯的生产方法,其特征在于:所述步骤S3中烘箱内部的温度为80-145摄氏度。
8.根据权利要求5所述的一种不易折损的锂电芯的生产方法,其特征在于:所述步骤S11中导热硅脂的厚度为2-5毫米。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910699314.8A CN110416443A (zh) | 2019-07-31 | 2019-07-31 | 一种不易折损的锂电芯及其生产方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910699314.8A CN110416443A (zh) | 2019-07-31 | 2019-07-31 | 一种不易折损的锂电芯及其生产方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN110416443A true CN110416443A (zh) | 2019-11-05 |
Family
ID=68364453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201910699314.8A Pending CN110416443A (zh) | 2019-07-31 | 2019-07-31 | 一种不易折损的锂电芯及其生产方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN110416443A (zh) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021119911A1 (zh) * | 2019-12-16 | 2021-06-24 | 宁德新能源科技有限公司 | 电芯 |
CN113140779A (zh) * | 2021-05-31 | 2021-07-20 | 惠州市恒泰科技股份有限公司 | 具有定形结构的弧形电芯及弧形锂电池 |
CN113764757A (zh) * | 2021-09-15 | 2021-12-07 | 深圳市康墨科技有限公司 | 一种智能报警锂电池 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101183709A (zh) * | 2007-12-14 | 2008-05-21 | 山东海霸通讯设备有限公司 | 磷酸铁锂动力电池方形塑料壳 |
CN204067445U (zh) * | 2014-07-08 | 2014-12-31 | 昆明理工大学 | 一种防膨胀锂离子动力电池壳 |
EP3024051A1 (de) * | 2014-11-20 | 2016-05-25 | HOPPECKE Batterien GmbH & Co. KG. | Gehäuse für eine Akkumulatorzelle |
CN106159121A (zh) * | 2015-05-15 | 2016-11-23 | 昆山雅森电子材料科技有限公司 | 电池壳层结构 |
CN207052633U (zh) * | 2017-08-24 | 2018-02-27 | 雷天温斯顿电池(长泰)有限公司 | 一种锂电池 |
CN208157459U (zh) * | 2018-04-10 | 2018-11-27 | 河南超威电源有限公司 | 提高酸量一致性的铅酸蓄电池塑壳结构 |
CN208570674U (zh) * | 2018-08-07 | 2019-03-01 | 烟台帝元光能科技有限公司 | 一种电池防爆壳体 |
-
2019
- 2019-07-31 CN CN201910699314.8A patent/CN110416443A/zh active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101183709A (zh) * | 2007-12-14 | 2008-05-21 | 山东海霸通讯设备有限公司 | 磷酸铁锂动力电池方形塑料壳 |
CN204067445U (zh) * | 2014-07-08 | 2014-12-31 | 昆明理工大学 | 一种防膨胀锂离子动力电池壳 |
EP3024051A1 (de) * | 2014-11-20 | 2016-05-25 | HOPPECKE Batterien GmbH & Co. KG. | Gehäuse für eine Akkumulatorzelle |
CN106159121A (zh) * | 2015-05-15 | 2016-11-23 | 昆山雅森电子材料科技有限公司 | 电池壳层结构 |
CN207052633U (zh) * | 2017-08-24 | 2018-02-27 | 雷天温斯顿电池(长泰)有限公司 | 一种锂电池 |
CN208157459U (zh) * | 2018-04-10 | 2018-11-27 | 河南超威电源有限公司 | 提高酸量一致性的铅酸蓄电池塑壳结构 |
CN208570674U (zh) * | 2018-08-07 | 2019-03-01 | 烟台帝元光能科技有限公司 | 一种电池防爆壳体 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021119911A1 (zh) * | 2019-12-16 | 2021-06-24 | 宁德新能源科技有限公司 | 电芯 |
CN113140779A (zh) * | 2021-05-31 | 2021-07-20 | 惠州市恒泰科技股份有限公司 | 具有定形结构的弧形电芯及弧形锂电池 |
CN113764757A (zh) * | 2021-09-15 | 2021-12-07 | 深圳市康墨科技有限公司 | 一种智能报警锂电池 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN110416443A (zh) | 一种不易折损的锂电芯及其生产方法 | |
CN105703010B (zh) | 电极片及电化学储能装置 | |
CN100367539C (zh) | 柔性薄型印刷电池和装置及其制造方法 | |
CN105977507B (zh) | 一种圆柱型锂一次电池及其制备方法 | |
CN102420312B (zh) | 一种高电压锂离子电池、复合电极对及制备方法 | |
CN109103448B (zh) | 一种高容量圆柱软包装锂离子电池及其制造方法 | |
CN107834007A (zh) | 隔膜和锂离子电池 | |
CN103151494B (zh) | 一种电池极片的制备方法及电池极片、电池 | |
CN104538584A (zh) | 一种多层负极片、负极片的制作方法以及锂离子电池 | |
CN104617334A (zh) | 一种柔性电池及其制造方法 | |
CN110071254A (zh) | 一种电池及其制备方法 | |
CN108807819A (zh) | 隔膜及其制备方法和锂硫电池 | |
CN102820487A (zh) | 锂离子电池 | |
CN109192543A (zh) | 一种氧化石墨烯基粘结剂及其制备方法以及电极片 | |
CN205723715U (zh) | 软包装锂离子电池 | |
CN110148697A (zh) | 一种聚烯烃锂电池隔膜涂层浆料及其应用 | |
CN108598559A (zh) | 一种柔性锂离子电池 | |
CN105679971B (zh) | 铝塑膜复合层及二次电池 | |
CN110931802A (zh) | 一种柔性轻质非金属集流体、极片的制备方法和应用以及一种锂蓄电池及其制备方法 | |
CN108630935A (zh) | 一种比能量大于200Wh/Kg的圆柱形锂离子电池及其制备方法 | |
CN105280907B (zh) | 基于复合镍钴铝/钛酸锂体系的电池电容及其制备方法 | |
CN105405668B (zh) | 一种(lmo‑ncm‑ac)/(lto‑ac)混合电池电容及其制备方法 | |
CN109659485A (zh) | 一种比能量达270Wh/Kg的圆柱形锂离子电池 | |
CN207517767U (zh) | 一种高强度抗摔聚合物锂离子电池结构 | |
CN110400904A (zh) | 一种复合陶瓷涂层锂电池正负极片及锂电池 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191105 |
|
RJ01 | Rejection of invention patent application after publication |