CN106543551A - A kind of lithium ion battery plastic casing, lithium ion battery and its manufacture method - Google Patents
A kind of lithium ion battery plastic casing, lithium ion battery and its manufacture method Download PDFInfo
- Publication number
- CN106543551A CN106543551A CN201510590685.4A CN201510590685A CN106543551A CN 106543551 A CN106543551 A CN 106543551A CN 201510590685 A CN201510590685 A CN 201510590685A CN 106543551 A CN106543551 A CN 106543551A
- Authority
- CN
- China
- Prior art keywords
- ion battery
- lithium ion
- plastic casing
- polypropylene
- cover plate
- Prior art date
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 100
- 239000004033 plastic Substances 0.000 title claims abstract description 82
- 229920003023 plastic Polymers 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000004743 Polypropylene Substances 0.000 claims abstract description 129
- 229920001155 polypropylene Polymers 0.000 claims abstract description 122
- -1 polypropylene Polymers 0.000 claims abstract description 110
- 239000000463 material Substances 0.000 claims abstract description 62
- 239000002994 raw material Substances 0.000 claims abstract description 36
- 239000003365 glass fiber Substances 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 238000005476 soldering Methods 0.000 claims abstract description 10
- 210000004243 sweat Anatomy 0.000 claims abstract description 10
- 239000006057 Non-nutritive feed additive Substances 0.000 claims abstract description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 6
- 239000011707 mineral Substances 0.000 claims abstract description 6
- 239000003063 flame retardant Substances 0.000 claims description 26
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- 239000003963 antioxidant agent Substances 0.000 claims description 18
- 230000003078 antioxidant effect Effects 0.000 claims description 18
- 238000002844 melting Methods 0.000 claims description 18
- 230000008018 melting Effects 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 15
- 150000001336 alkenes Chemical class 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 14
- 239000012943 hotmelt Substances 0.000 claims description 13
- 239000003792 electrolyte Substances 0.000 claims description 12
- 239000000314 lubricant Substances 0.000 claims description 12
- 230000000979 retarding effect Effects 0.000 claims description 11
- 239000012467 final product Substances 0.000 claims description 9
- 239000000155 melt Substances 0.000 claims description 9
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 8
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 8
- 239000011976 maleic acid Substances 0.000 claims description 8
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 8
- LJCFOYOSGPHIOO-UHFFFAOYSA-N antimony pentoxide Chemical compound O=[Sb](=O)O[Sb](=O)=O LJCFOYOSGPHIOO-UHFFFAOYSA-N 0.000 claims description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Inorganic materials [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 239000007822 coupling agent Substances 0.000 claims description 4
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 4
- 125000003011 styrenyl group Chemical class [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910000410 antimony oxide Inorganic materials 0.000 claims description 3
- WHHGLZMJPXIBIX-UHFFFAOYSA-N decabromodiphenyl ether Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1OC1=C(Br)C(Br)=C(Br)C(Br)=C1Br WHHGLZMJPXIBIX-UHFFFAOYSA-N 0.000 claims description 3
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 claims description 3
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 150000008065 acid anhydrides Chemical class 0.000 claims description 2
- 150000007513 acids Chemical class 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims description 2
- RPQRDASANLAFCM-UHFFFAOYSA-N oxiran-2-ylmethyl prop-2-enoate Chemical compound C=CC(=O)OCC1CO1 RPQRDASANLAFCM-UHFFFAOYSA-N 0.000 claims description 2
- AHJKRLASYNVKDZ-UHFFFAOYSA-N DDD Chemical compound C=1C=C(Cl)C=CC=1C(C(Cl)Cl)C1=CC=C(Cl)C=C1 AHJKRLASYNVKDZ-UHFFFAOYSA-N 0.000 claims 1
- 150000001649 bromium compounds Chemical group 0.000 claims 1
- 239000013078 crystal Substances 0.000 claims 1
- 150000002500 ions Chemical class 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 claims 1
- 238000007667 floating Methods 0.000 abstract description 8
- 238000001746 injection moulding Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 17
- 238000012360 testing method Methods 0.000 description 14
- 238000002360 preparation method Methods 0.000 description 10
- 239000002131 composite material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 6
- 150000001408 amides Chemical class 0.000 description 6
- 239000004519 grease Substances 0.000 description 6
- 230000001050 lubricating effect Effects 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 5
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 4
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000012661 block copolymerization Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 206010023126 Jaundice Diseases 0.000 description 2
- 229910052493 LiFePO4 Inorganic materials 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004643 material aging Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- XUBKPYAWPSXPDZ-UHFFFAOYSA-N [Ba].OS(O)(=O)=O Chemical compound [Ba].OS(O)(=O)=O XUBKPYAWPSXPDZ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 150000008301 phosphite esters Chemical group 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of lithium ion battery plastic casing, lithium ion battery and its manufacture method, wherein, lithium ion battery plastic casing includes that a body and a cover plate, body and cover plate are molded by modified polypropylene material, and which includes following raw material components：Polypropylene 35-76.9%, mineral-filled thing 3-7.5%, glass fibre 15-20%, graft polypropylene 5% and processing aid 0.1-2.5%；Lithium ion battery includes above-mentioned lithium ion battery plastic casing, and its manufacture method comprises the steps：(1) by above-mentioned modified polypropylene material injection moulding, body and cover plate are obtained；(2) battery bag is placed in into body interior, cover plate is placed at body openings, sweat soldering sealing.The lithium ion battery plastic case structure of the present invention is simple, low production cost, smooth in appearance, uniform color, without substantially floating fine and intensity is high, be unlikely to deform, it is weightless less, resistance to ag(e)ing is good, long service life.
Description
Technical field
The present invention relates to field of power lithium ion battery technology, and in particular to a kind of lithium ion battery plastic housing
Body, lithium ion battery and its manufacture method.
Background technology
At present, power lithium-ion battery housing mainly has Stainless Steel Shell, plastic casing, aluminum enclosure, aluminium
Four type of plastic film.Wherein, plastic casing is generally molded by PP composite material.Polypropylene is multiple
Condensation material housing has that light weight, good insulating, corrosion resisting property are superior, machine-shaping is easy, price is low
Honest and clean the advantages of, it is widely used to power lithium-ion battery shell.
It is however, current PP composite material battery container generally existing intensity is relatively low, easy bulging, quick-fried
Split, poor heat resistance, yielding defect under high temperature.Conventional improved procedure is in PP composite material
The inorganic filler such as middle addition talcum powder, calcium carbonate and glass fibre, with improve plastic casing intensity with it is heat-resisting
Property, but case weight increase is not only resulted in using the improved procedure, there is also the bad outward appearance such as floating fibre
Phenomenon.Meanwhile, the presence of some additives or impurity in PP composite material can make plastic casing exist
Easily occur becoming fragile when using under the conditions of illumination or some harsh environments, that surface checking, jaundice are faded etc. is existing
As causing the reduction of housing service life.
On the other hand, during battery cycle charge-discharge, pole piece can be expanded, inside battery air pressure
Also can gradually be lifted, the gross distortion phenomenons such as bulging occur so as to cause housing.When actually used, drum
Swollen battery is blocked up due to thickness, may cause battery performance decline, burst outer packing shell, battery contact
It is bad, situations such as normally can not assemble, while also increasing the hidden danger after entrucking.In addition, lithium-ion electric
Pond is in use also with different degrees of weightlessness.Housing bulging, material aging and battery
Weightless the problems such as, has had a strong impact on the service life and security performance of power lithium-ion battery.
Chinese patent CN203932126U discloses a kind of reinforced battery container, and this housing is mainly by outer
Layer, the three layers of housing composition in middle level and internal layer, wherein outer layer and internal layer are plastic material, and middle level is stainless steel
Material, although the structure improves the compressive resistance of housing to a certain extent, complex structure is produced into
This height.Chinese patent CN2632863Y discloses a kind of lithium ion battery plastic casing, and the housing is adopted
Plain polypropylene composite, outer surface are provided with horizontal and vertical projection, to a certain degree improve housing
Intensity, but the effect of anti-battery oxygen blast cyanidation is not notable, and the ageing-resistant performance of housing is poor.
Based on above-mentioned analysis, battery plastics housing of the prior art can not meet lithium ion battery case well
Requirement during body actual production and use.It would therefore be highly desirable to develop a kind of simple structure, production cost
Low, intensity is high, be unlikely to deform, ageing-resistant lithium ion battery plastic casing.
The content of the invention
The technical problem to be solved is to overcome following defects：(1) lithium ion battery is in circulation
Easily occur in charge and discharge process pole piece expansion, inside battery air pressure lifted, cause battery container bulging with
Deformation, causes cell thickness super thick, and (2) lithium ion battery has weightlessness in actual use,
(3) easily occur becoming fragile when plastic casing is used under the conditions of illumination or some harsh environments, surface
The material aging phenomenons such as cracking, jaundice colour fading, reduce housing service life, and (4) are due to adding glass fibers
Dimension strengthens, and the bad outward appearance phenomenons such as floating fibre occurs in plastic casing surface, there is provided a kind of lithium ion battery modeling
Material shell body, lithium ion battery and its manufacture method.The lithium ion battery plastic case structure of the present invention is simple,
Low production cost, smooth in appearance, uniform color, without substantially floating fine and intensity is high, be unlikely to deform, it is weightless
Less, resistance to ag(e)ing is good, long service life.
The present invention solves above-mentioned technical problem by following technical proposals.
The invention provides a kind of lithium ion battery plastic casing：The knot of the lithium ion battery plastic casing
Structure is identical with existing battery plastics housing, generally comprises a body and a cover plate, one end of the body
Opening, the cover plate are arranged at the opening of the body, and the body or cover plate are provided with safety valve peace
Dress hole；
Wherein, the body and the cover plate are molded using modified polypropylene material, described modified poly-
Propylene material includes following raw material components：Polypropylene 35-76.9%, mineral-filled thing 3-7.5%, glass
Fiber 15-20%, graft polypropylene 5% and processing aid 0.1-2.5%, the consumption summation of each raw material components
For 100%；The percentage is each raw material components that the quality of each component accounts for the modified polypropylene material
The percentage of gross mass.
Wherein, the polypropylene is polypropylene commonly used in the art, the polyacrylic melt flows
Speed is preferably 0.5-5g/10min, is more preferably 1-3g/10min.Melt flow rate (MFR) letter again
It is referred to as melting finger, is according to 3682 thermoplastic melt mass flow rates of standard GB/T/T and melt
Rate of volume flow assay method test obtain, test condition be 230 DEG C of test temperature, nominal load
2.16kg。
The polypropylene is preferably the blend of high-crystallinity polypropylene, HOPP and COPP.
Wherein, the high-crystallinity polypropylene is high-crystallinity polypropylene commonly used in the art, and general degree of crystallinity exists
More than 70%.The COPP is COPP commonly used in the art, is generally divided into random
COPP and block copolymerization polypropylene；The atactic copolymerized polypropene is typically by propylene and a small amount of second
Alkene, 1- butylene or 1- hexene molecule copolymerization are formed；The block copolymerization polypropylene is typically by propylene and ethene
Block copolymerization is formed；The COPP is preferably atactic copolymerized polypropene.Described highly crystalline poly- third
Alkene, HOPP and COPP are commercially available, and those skilled in the art can be according to commercially available height
The melt flow rate (MFR) of crystalline polypropylene, HOPP and COPP, adjusts according to common sense in the field
The amount ratio of whole three, as long as meet the polyacrylic melt flow rate (MFR) for finally giving existing
0.5-5g/10min, preferably in the range of 1-3g/10min；The high-crystallinity polypropylene, homopolymerization
The mass ratio of polypropylene and COPP is preferably 1:1:1.
Wherein, the mineral-filled thing is mineral-filled thing commonly used in the art, preferably sulfuric acid
Barium and/or talcum powder.
Wherein, the glass fibre is short glass fiber commonly used in the art, preferably length
0.2-10mm, the short glass fiber of 8-20 μm of diameter.
Wherein, the graft polypropylene is can select commonly used in the art in the present invention as compatilizer
Graft polypropylene, the grafting that preferably polypropylene grafted modified unsaturated acids or unsaturated acid anhydride are obtained
Oligomer, the oligomer are art technology term, generally refer to molecular weight 104Following polymerization
Thing.The percent grafting of the graft polypropylene is preferably 0.3-1.2%；Melt flow rate (MFR) is preferably
50-120g/10min, the melt flow rate (MFR) are to obtain according to 3682 standard testings of GB/T, test-strips
Part be 230 DEG C of test temperature, nominal load 2.16kg.
The graft polypropylene be preferably polypropylene grafted maleic acid, itaconic acid grafted polypropylene, poly- third
Alkene graft acrylic acid, polypropylene grafted maleic anhydride or polypropylene grafted glycidyl acrylate, more preferably
Ground is polypropylene grafted maleic acid or polypropylene grafted maleic anhydride.Those skilled in the art can be according to ability
Domain general knowledge selects the species of the graft polypropylene, as long as the percent grafting for meeting graft polypropylene exists
0.3-1.2%, melt flow rate (MFR) is in 50-120g/10min.
Wherein, the processing aid is processing aid commonly used in the art, preferably antioxidant,
One or more in coupling agent, nucleator, antitack agent and lubricant is more preferably antioxidant, antiseized
One or more in agent and lubricant.The antioxidant is antioxidant commonly used in the art, for example
Antioxidant 1010, vapour bar IRGAFOS38, vapour bar IRGAFOS168.The coupling agent and nucleator
It is coupling agent commonly used in the art and nucleator.The antitack agent is commonly used in the art anti-
Stick, such as K-710 antitack agents, K-720 antitack agents.The lubricant is commonly used in the art
Lubricant, such as acid amides lubricating grease.
It is preferred that the raw material components of the modified polypropylene material also include fire retardant.The fire retardant is
Fire retardant commonly used in the art, preferably bromide fire retardant are more preferably TDE,
One or more in decabromodiphenyl oxide and brominated styrene.The consumption of the fire retardant is preferably 15-35%
, it is more preferably 15-22.5%, the percentage accounts for the modified polypropylene material for the quality of fire retardant
The percentage of each raw material components gross mass.
More preferably, the raw material components of the modified polypropylene material also include fire retarding synergist.It is described fire-retardant
Synergist is fire retarding synergist commonly used in the art, preferably antimony oxide, antimony pentoxide
With one or more in Firebrake ZB, the Firebrake ZB preferably diboron trioxide acid zinc.It is described fire-retardant
The consumption of synergist is preferably 1-10%, is more preferably 4.5-7.5%, and the percentage is fire-retardant synergistic
The quality of agent accounts for the percentage of each raw material components gross mass of the modified polypropylene material.Wherein, it is described
Fire retardant is preferably 3 with the mass ratio of the fire retarding synergist:1.
In the present invention, the modified polypropylene material can be according to this area conventional method, by above-mentioned each raw material
Component is well mixed, and then melts in an extruder, and extrusion, granulation are obtained, and the temperature of the melting is
180-250℃.Wherein, those skilled in the art can according to common sense in the field select extruder model,
Melting extrusion temperature and related process parameters.The melting extrusion temperature of the extruder is preferably：One area
Temperature 180-230 DEG C, two area's temperature 220-240 DEG C, three area's temperature 220-240 DEG C, four area's temperature 220-240
DEG C, five area's temperature 230-250 DEG C, six area's temperature 240-250 DEG C, seven area's temperature 230-250 DEG C, 8th area
Temperature 220-240 DEG C, nine area's temperature 200-220 DEG C.
In the present invention, the safety valve installing hole is arranged on the lithium-ion electric according to this area usual manner
The upper surface of pond plastic casing, can usually adopt following either types, mode one：The body is opened
Mouth is arranged on body upper end, and the cover plate is arranged at the opening of body upper end, the safety valve installing hole
It is arranged on the cover plate；Mode two：The opening of the body is arranged on body lower end, and the cover plate sets
Put at the opening of body lower end, the safety valve installing hole is arranged on the upper surface of the housing.Wherein,
Safety valve installing hole on the lithium ion battery plastic casing can be according to common sense in the field and safety valve phase
Even；Described safety valve is safety valve commonly used in the art, generally air bleeding valve or explosion-proof valve.
In the present invention, the set-up mode of the cover plate can adopt this area usual manner, preferably heat
Welding.
Present invention also offers a kind of lithium ion battery, the lithium ion battery includes lithium-ion electric described in
Pond plastic casing, one is arranged on the safety valve of the lithium ion battery plastic casing upper surface and is sealed in
Battery bag and electrolyte inside the lithium ion battery plastic casing, the battery bag are connected with pole
Connect, the pole is connected through the upper surface of the plastic casing and with the plastic casing.Wherein,
The battery bag be according to this area routine preparation method make, generally comprise positive plate, negative plate and
Barrier film, the positive electrode are generally LiFePO4, and negative material is generally graphite；The electrolyte is
Electrolyte commonly used in the art, generally organic solvent and lithium hexafluoro phosphate.
Present invention also offers the manufacture method of above-mentioned lithium ion battery, described manufacture method includes following
Step：
(1) modified polypropylene material is added in barrel from the hopper of injection machine, heating melting,
Melt is formed, then melt is expelled to body and die for cover plate die cavity respectively, pressurize is cooled down, the demoulding,
Respectively obtain body and cover plate；
(2) the battery bag is placed in into the body interior, the cover plate is placed in into described then
At the opening of body, sweat soldering sealing, afterwards toward injection electrolyte in the plastic casing after sealing, then
Safety valve is installed in the safe valve opening of plastic casing upper surface, lithium ion battery is obtained final product Jing after forming and capacity dividing.
In step (1), described injection machine is injection machine commonly used in the art.
In step (1), the temperature of the barrel can be selected according to common sense in the field, preferably：
Barrel back segment temperature is 180-210 DEG C, and barrel stage casing temperature is 200-230 DEG C, and barrel front-end temperature is
220-240℃。
In step (1), preferably 200-230 DEG C of the temperature of the melt.
In step (1), the speed of the injection, pressure and time, the temperature of the mould is described
The pressure of pressurize and time, the mode of the cooling and time, those skilled in the art can be according to manufactured
Lithium ion battery dimensions according to common sense in the field select related process parameters.
In step (2), the sweat soldering can be carried out according to this area routine operation, preferably according to
Following technological parameter is carried out：300-320 DEG C of hot melting temperature, hot melt pressure 0.35-0.50MPa, during hot melt
Between 10s, welding pressure 0.45-0.50MPa, weld interval 10-12s.
On the basis of common sense in the field is met, above-mentioned each optimum condition can be combined, obtain final product this
Bright each preferred embodiments.
Agents useful for same of the present invention and raw material are commercially available.
The present invention positive effect be：
1. lithium ion battery plastic casing of the present invention significantly improves the multiple cycle charge-discharge of lithium ion battery
Deformation intensity under the influence of the factor such as pole piece expansion and the increase of enclosure interior gas, drastically increases which afterwards
Compressive resistance and anti-deformation force, and reduce the production cost of identical compressive resistance housing.
2. lithium ion battery plastic casing of the present invention also effectively improves battery weightlessness, while improve
The ageing-resistant performance of housing, extends battery.
3. the housing of lithium ion battery plastic casing of the present invention is molded using specific modified polypropylene material
Form, battery container smooth in appearance, uniform color, nothing are substantially floating fine, significantly improve surface of shell
The bad outward appearance phenomenon such as floating fibre.
4. the housing of lithium ion battery plastic casing of the present invention is molded using specific modified polypropylene material
Form so that housing be easy to welding, without sizing.
Specific embodiment
The present invention is further illustrated below by the mode of embodiment, but is not therefore limited the present invention to
Among described scope of embodiments.The experimental technique of unreceipted actual conditions in the following example, according to normal
Rule method and condition, or select according to catalogue.
It is in following examples, raw materials used commercially available.
Embodiment 1
A kind of lithium ion battery plastic casing, including a body and a cover plate, wherein body upper end open,
Cover plate is arranged at the opening of body upper end, and cover plate is provided with safety valve installing hole；Body and cover plate are adopted
It is molded with modified polypropylene material.
The raw material components of the modified polypropylene material are as shown in table 1, wherein, polypropylene is highly crystalline poly- third
Alkene, HOPP and atactic copolymerized polypropene in mass ratio 1:1:The mixture of 1 composition, its melt flows
Speed is 1-3g/10min (230 DEG C, 2.16kg)；Glass fibre be length 0.2-10mm, 8-20 μm of diameter
Short glass fiber；Compatilizer be polypropylene grafted maleic acid, its percent grafting be 0.3-1.2%, melt
Flow rate is 50-120g/10min (230 DEG C, 2.16kg)；Antioxidant is vapour bar IRGAFOS38.
The preparation method of the modified polypropylene material is as follows：Above-mentioned each raw material components are well mixed, are then being squeezed
Go out in machine and melt, extrusion, granulation are obtained final product；The melting extrusion temperature of wherein extruder is as follows：One area's temperature
180-230 DEG C of degree, two area's temperature 220-240 DEG C, three area's temperature 220-240 DEG C, four area's temperature 220-240 DEG C,
Five area's temperature 230-250 DEG C, six area's temperature 240-250 DEG C, seven area's temperature 230-250 DEG C, eight area's temperature
220-240 DEG C, nine area's temperature 200-220 DEG C.
A kind of lithium ion battery, its manufacture method are carried out in accordance with the following steps：
(1) above-mentioned modified polypropylene material is added in barrel from the hopper of injection machine, heating melting,
Melt is formed, body mold die cavity is then injected the melt into, pressurize, cooling, the demoulding obtain body；
Wherein, melt temperature be 220-225 DEG C, injection rate be 55mm/s, injection pressure be 65MPa, note
The time is penetrated for 5s, dwell pressure is 55MPa, and the dwell time is 5s, and the type of cooling is water-cooled, cooling
Time is 60s；
(2) above-mentioned modified polypropylene material is added in barrel from the hopper of injection machine, heating melting,
Melt is formed, die for cover plate die cavity is then injected the melt into, pressurize, cooling, the demoulding obtain cover plate；
Wherein, melt temperature be 215-220 DEG C, injection rate be 55mm/s, injection pressure be 85MPa, note
The time is penetrated for 3s, dwell pressure is 75MPa, and the dwell time is 8s, and the type of cooling is water-cooled, cooling
Time is 25s；
(3) battery bag is placed in into body interior, then cover plate is placed at the opening of the body,
Sweat soldering is sealed, afterwards toward injection electrolyte in the plastic casing after sealing, then in plastic casing upper end
Safety valve is installed in the safe valve opening in face, lithium ion battery is obtained final product Jing after forming and capacity dividing；Wherein, welding
Technological parameter is as follows：Hot melting temperature is 315-320 DEG C, and hot melt pressure is 0.45-0.50MPa, during hot melt
Between be 10s, welding pressure is 0.45-0.50MPa, and weld interval is 10s；Battery bag include positive plate,
Negative plate and barrier film, positive electrode are LiFePO4, and negative material is graphite, and electrolyte is organic solvent
And lithium hexafluoro phosphate.
Embodiment 2
A kind of lithium ion battery plastic casing, including a body and a cover plate, wherein body lower ending opening,
Cover plate is arranged at the opening of body lower end, and the upper surface of body is provided with safety valve installing hole；Body and lid
Plate is molded using modified polypropylene material.
The raw material components of the modified polypropylene material are as shown in table 1, wherein, polypropylene is highly crystalline poly- third
Alkene, HOPP and atactic copolymerized polypropene in mass ratio 1:1:The mixture of 1 composition, its melt flows
Speed is 1-3g/10min (230 DEG C, 2.16kg)；Glass fibre be length 0.2-10mm, 8-20 μm of diameter
Short glass fiber；Compatilizer be polypropylene grafted maleic acid, its percent grafting be 0.3-1.2%, melt
Flow rate is 50-120g/10min (230 DEG C, 2.16kg)；Antioxidant is vapour bar IRGAFOS38；
Lubricant is acid amides lubricating grease；Antitack agent is K-720 antitack agents.The preparation side of the modified polypropylene material
Method is with embodiment 1.
A kind of lithium ion battery, its manufacture method are carried out in accordance with the following steps：
(1) above-mentioned modified polypropylene material is added in barrel from the hopper of injection machine, heating melting,
Melt is formed, body mold die cavity is then injected the melt into, pressurize, cooling, the demoulding obtain body；
Wherein, melt temperature be 225-230 DEG C, injection rate be 60mm/s, injection pressure be 80MPa, note
The time is penetrated for 5s, dwell pressure is 90MPa, and the dwell time is 5s, and the type of cooling is water-cooled, cooling
Time is 60s；
(2) above-mentioned modified polypropylene material is added in barrel from the hopper of injection machine, heating melting,
Melt is formed, die for cover plate die cavity is then injected the melt into, pressurize, cooling, the demoulding obtain cover plate；
Wherein, melt temperature be 200-210 DEG C, injection rate be 55mm/s, injection pressure be 50MPa, note
The time is penetrated for 3s, dwell pressure is 50MPa, and the dwell time is 5s, and the type of cooling is water-cooled, cooling
Time is 25s；
(3) battery bag is placed in into body interior, then cover plate is placed at the opening of the body,
Sweat soldering is sealed, afterwards toward injection electrolyte in the plastic casing after sealing, then in plastic casing upper end
Safety valve is installed in the safe valve opening in face, lithium ion battery is obtained final product Jing after forming and capacity dividing；Wherein, welding
Technological parameter is as follows：Hot melting temperature is 300-305 DEG C, and hot melt pressure is 0.35-0.40MPa, during hot melt
Between be 10s, welding pressure is 0.45-0.50MPa, and weld interval is 12s；Battery bag and electrolyte are same
Embodiment 1.
Embodiment 3
A kind of lithium ion battery plastic casing, including a body and a cover plate, wherein body upper end open,
Cover plate is arranged at the opening of body upper end, and cover plate is provided with safety valve installing hole；Body and cover plate are adopted
It is molded with modified polypropylene material.
The raw material components of the modified polypropylene material are as shown in table 1, wherein, polypropylene is highly crystalline poly- third
Alkene, HOPP and atactic copolymerized polypropene in mass ratio 1:1:The mixture of 1 composition, its melt flows
Speed is 1-3g/10min (230 DEG C, 2.16kg)；Glass fibre be length 0.2-10mm, 8-20 μm of diameter
Short glass fiber；Compatilizer be polypropylene grafted maleic acid, its percent grafting be 0.3-1.2%, melt
Flow rate is 50-120g/10min (230 DEG C, 2.16kg)；Antioxidant is antioxidant 1010；Lubricant
For acid amides lubricating grease；Antitack agent is K-710 antitack agents.The preparation method of the modified polypropylene material is with enforcement
Example 1.
A kind of lithium ion battery, its manufacture method is with embodiment 1.
Embodiment 4
A kind of lithium ion battery plastic casing, including a body and a cover plate, wherein body upper end open,
Cover plate is arranged at the opening of body upper end, and cover plate is provided with safety valve installing hole；Body and cover plate are adopted
It is molded with modified polypropylene material.
The raw material components of the modified polypropylene material are as shown in table 2, wherein, polypropylene is highly crystalline poly- third
Alkene, HOPP and atactic copolymerized polypropene in mass ratio 1:1:The mixture of 1 composition, its melt flows
Speed is 1-3g/10min (230 DEG C, 2.16kg)；Glass fibre be length 0.2-10mm, 8-20 μm of diameter
Short glass fiber；Compatilizer is polypropylene grafted maleic anhydride, and its percent grafting is 0.3-1.2%, is melted
Body flow rate is 50-120g/10min (230 DEG C, 2.16kg)；Antioxidant is phosphite ester kind antioxidant
Vapour bar IRGAFOS168；Lubricant is acid amides lubricating grease；Bromide fire retardant is decabromodiphenyl oxide；Fire-retardant association
Effect agent is antimony oxide.The preparation method of the modified polypropylene material is with embodiment 1.
A kind of lithium ion battery, its manufacture method is with embodiment 1.
The raw material of the lithium ion battery only plastic casing in lithium ion battery and embodiment 1 in embodiment 4
Component is different, other all sames.
Embodiment 5
A kind of lithium ion battery plastic casing, including a body and a cover plate, wherein body upper end open,
Cover plate is arranged at the opening of body upper end, and cover plate is provided with safety valve installing hole；Body and cover plate are adopted
It is molded with modified polypropylene material.
The raw material components of the modified polypropylene material are as shown in table 2, wherein, polypropylene is highly crystalline poly- third
Alkene, HOPP and atactic copolymerized polypropene in mass ratio 1:1:The mixture of 1 composition, its melt flows
Speed is 1-3g/10min (230 DEG C, 2.16kg)；Glass fibre be length 0.2-10mm, 8-20 μm of diameter
Short glass fiber；Compatilizer be polypropylene grafted maleic acid, its percent grafting be 0.3-1.2%, melt
Flow rate is 50-120g/10min (230 DEG C, 2.16kg)；Antioxidant is vapour bar IRGAFOS38；Profit
Lubrication prescription is acid amides lubricating grease；Antitack agent is K-720 antitack agents；Bromide fire retardant is TDE；
Fire retarding synergist is diboron trioxide acid zinc.The preparation method of the modified polypropylene material is with embodiment 1.
A kind of lithium ion battery, its manufacture method is with embodiment 1.
The raw material of the lithium ion battery only plastic casing in lithium ion battery and embodiment 1 in embodiment 5
Component is different, other all sames.
Embodiment 6
A kind of lithium ion battery plastic casing, including a body and a cover plate, wherein body upper end open,
Cover plate is arranged at the opening of body upper end, and cover plate is provided with safety valve installing hole；Body and cover plate are adopted
It is molded with modified polypropylene material.
The raw material components of the modified polypropylene material are as shown in table 2, wherein, polypropylene is highly crystalline poly- third
Alkene, HOPP and atactic copolymerized polypropene in mass ratio 1:1:The mixture of 1 composition, its melt flows
Speed is 1-3g/10min (230 DEG C, 2.16kg)；Glass fibre be length 0.2-10mm, 8-20 μm of diameter
Short glass fiber；Compatilizer be polypropylene grafted maleic acid, its percent grafting be 0.3-1.2%, melt
Flow rate is 50-120g/10min (230 DEG C, 2.16kg)；Antioxidant is antioxidant 1010；Lubricant
For acid amides lubricating grease；Antitack agent is K-710 macromolecule antitack agents；Bromide fire retardant is brominated styrene；
Fire retarding synergist is antimony pentoxide.The preparation method of the modified polypropylene material is with embodiment 1.
A kind of lithium ion battery, its manufacture method is with embodiment 1.
The raw material of the lithium ion battery only plastic casing in lithium ion battery and embodiment 1 in embodiment 6
Component is different, other all sames.
Comparative example 1
A kind of lithium ion battery plastic casing, including a body and a cover plate, wherein body upper end open,
Cover plate is arranged at the opening of body upper end, and cover plate is provided with safety valve installing hole；Body and cover plate are adopted
It is molded with polypropylene material.The raw material components of the polypropylene material are as shown in table 1, wherein, poly- third
Alkene is high-crystallinity polypropylene；Antioxidant is antioxidant 1010.The preparation method of the polypropylene material is with enforcement
Example 1.
A kind of lithium ion battery, its manufacture method are carried out in accordance with the following steps：
(1) with 1 step of embodiment (1)；
(2) with 1 step of embodiment (2)；
(3) battery bag is placed in into body interior, then cover plate is placed at the opening of the body,
Sweat soldering is sealed, afterwards toward injection electrolyte in the plastic casing after sealing, then in plastic casing upper end
Safety valve is installed in the safe valve opening in face, lithium ion battery is obtained final product Jing after forming and capacity dividing；Wherein, welding
Technological parameter is as follows：Hot melting temperature is 325-330 DEG C, and hot melt pressure is 0.45-0.50MPa, during hot melt
Between be 12s, welding pressure is 0.45-0.50MPa, and weld interval is 10s；Battery bag is with embodiment 1.
The raw material of the lithium ion battery only plastic casing in lithium ion battery and embodiment 1 in comparative example 1
Component is different, other all sames.
Comparative example 2
A kind of lithium ion battery plastic casing, including a body and a cover plate, wherein body lower ending opening,
Cover plate is arranged at the opening of body lower end, and the upper surface of body is provided with safety valve installing hole；Body and lid
Plate is molded using polypropylene material.The raw material components of the polypropylene material are as shown in table 1, wherein,
Polypropylene is high-crystallinity polypropylene；Glass fibre is AR glass fibres；Compatilizer is polypropylene grafted third
Olefin(e) acid ethylene oxidic ester；Antioxidant is antioxidant 1010.The same embodiment of preparation method of the polypropylene material
1。
A kind of lithium ion battery, its manufacture method are carried out in accordance with the following steps：
(1) with 2 step of embodiment (1)；
(2) with 2 step of embodiment (2)；
(3) battery bag is placed in into body interior, then cover plate is placed at the opening of the body,
Sweat soldering is sealed, afterwards toward injection electrolyte in the plastic casing after sealing, then in plastic casing upper end
Safety valve is installed in the safe valve opening in face, lithium ion battery is obtained final product Jing after forming and capacity dividing；Wherein, welding
Technological parameter is as follows：Hot melting temperature is 285-290 DEG C, and hot melt pressure is 0.35-0.40MPa, during hot melt
Between be 8s, welding pressure is 0.45-0.50MPa, and weld interval is 12s；Battery bag is with embodiment 1.
The raw material of the lithium ion battery only plastic casing in lithium ion battery and embodiment 2 in comparative example 2
Component is different, other all sames.
Comparative example 3
A kind of lithium ion battery plastic casing, including a body and a cover plate, wherein body upper end open,
Cover plate is arranged at the opening of body upper end, and cover plate is provided with safety valve installing hole；Body and cover plate are adopted
It is molded with polypropylene material.The raw material components of the polypropylene material are as shown in table 2, wherein, poly- third
Alkene is HOPP；Glass fibre is AR glass fibres；Compatilizer contracts for polypropylene grafted acrylic acid
Water glyceride；Fire retardant is brominated styrene；Antioxidant is antioxidant 1010.The system of the polypropylene material
Preparation Method is with embodiment 1.
A kind of lithium ion battery, its manufacture method are carried out in accordance with the following steps：
(1) with 1 step of embodiment (1)；
(2) with 1 step of embodiment (2)；
(3) battery bag is placed in into body interior, then cover plate is placed at the opening of the body,
Sweat soldering is sealed, afterwards toward injection electrolyte in the plastic casing after sealing, then in plastic casing upper end
Safety valve is installed in the safe valve opening in face, lithium ion battery is obtained final product Jing after forming and capacity dividing；Wherein, welding
Technological parameter is as follows：Hot melting temperature is 320-330 DEG C, and hot melt pressure is 0.40-0.45MPa, during hot melt
Between be 10s, welding pressure is 0.45-0.50MPa, and weld interval is 10s.
The raw material of the lithium ion battery only plastic casing in lithium ion battery and embodiment 1 in comparative example 3
Component is different, other all sames.
The raw material components of the modified polypropylene material of 1 embodiment 1-3 of table and comparative example 1-2
| Material name | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 |
| Polypropylene | 76.9% | 72% | 65% | 96.9% | 64.9% |
| Barium sulfate | 3% | 3% | 3.5% | - | - |
| Talcum powder | - | 1% | 4% | 3% | - |
| Glass fibre | 15% | 18% | 20% | - | 30% |
| Compatilizer | 5% | 5% | 5% | - | 5% |
| Antioxidant | 0.1% | 0.5% | 1% | 0.1% | 0.1% |
| Lubricant | - | 0.3% | 1% | - | - |
| Antitack agent | - | 0.2% | 0.5% | - | - |
The raw material components of the modified polypropylene material of 2 embodiment 4-6 of table and comparative example 3
| Material name | Embodiment 4 | Embodiment 5 | Embodiment 6 | Comparative example 3 |
| Polypropylene | 56.9% | 52% | 35% | 64.9% |
| Barium sulfate | 3% | 3% | 3.5% | - |
| Talcum powder | - | 1% | 4% | - |
| Glass fibre | 15% | 18% | 20% | 15% |
| Compatilizer | 5% | 5% | 5% | 5% |
| Antioxidant | 0.1% | 0.5% | 1% | 0.1% |
| Lubricant | - | 0.3% | 1% | - |
| Antitack agent | - | 0.2% | 0.5% | - |
| Bromide fire retardant | 15.5% | 15% | 22.5% | 15% |
| Fire retarding synergist | 4.5% | 5% | 7.5% | - |
Effect example 1
Test the lithium ion battery plastic casing of the embodiment of the present invention 1 and comparative example 1 and made by the housing
Lithium ion battery performance, test result is as shown in table 3.
The test result of the lithium ion battery plastic casing properties of 3 embodiment 1 of table and comparative example 1
Effect example 2
Test the lithium ion battery plastic casing of the embodiment of the present invention 2 and comparative example 2 and made by the housing
Lithium ion battery performance, test result is as shown in table 4.
The test result of the lithium ion battery plastic casing properties of 4 embodiment 2 of table and comparative example 2
From table 3,4, the housing of the lithium ion battery plastic casing of the embodiment of the present invention 1 and 2 and
Cover plate is molded using the specific PP composite material of the present invention, when battery is in multiple charge and discharge cycles
During produce in a large amount of gases, shell in the case that pressure increases, bigger internal pressure can be born,
With higher burst pressure, housing bulging and metaboly are effectively reduced, electricity is drastically increased
The compressive resistance of pond housing, while resistance to ag(e)ing has also obtained larger improvement, and housing outward appearance is good, nothing
It is substantially floating fine.The effect above of embodiment 3 is suitable with embodiment 1 and 2.
Effect example 3
Test the lithium ion battery plastic casing of the embodiment of the present invention 4 and comparative example 3 and made by the housing
Performance of lithium ion battery, test result is as shown in table 5 below.
The test result of the lithium ion battery plastic casing properties of 5 embodiment 4 of table and comparative example 3
As shown in Table 5, the housing of the lithium ion battery plastic casing of the embodiment of the present invention 4 and cover plate are adopted
Specific PP composite material of the invention is molded, when battery is produced during multiple charge and discharge cycles
In the case that pressure increases in a large amount of gases of life, shell, bigger internal pressure can be born, with higher
Burst pressure, effectively reduce housing bulging and metaboly, drastically increase battery container
Compressive resistance, while resistance to ag(e)ing has also obtained larger improvement, and housing outward appearance is good, without substantially floating fibre,
Flame retardant rating has reached UL94V-0 levels.The effect above of embodiment 5,6 is suitable with embodiment 4.
Claims (10)
1. a kind of lithium ion battery plastic casing, the lithium ion battery plastic casing include a body and
One cover plate, it is characterised in that the body and the cover plate are molded by modified polypropylene material, institute
Stating modified polypropylene material includes following raw material components：Polypropylene 35-76.9%, mineral-filled thing 3-7.5%,
Glass fibre 15-20%, graft polypropylene 5% and processing aid 0.1-2.5%, the consumption of each raw material components
Summation is 100%；The percentage is each raw material that the quality of each component accounts for the modified polypropylene material
The percentage of component gross mass.
2. lithium ion battery plastic casing as claimed in claim 1, it is characterised in that described poly- third
Blend of the alkene for high-crystallinity polypropylene, HOPP and COPP；
And/or, the polyacrylic melt flow rate (MFR) is 0.5-5g/10min；
And/or, the mineral-filled thing is barium sulfate and/or talcum powder；
And/or, the glass fibre be length 0.2-10mm, the short glass fiber of 8-20 μm of diameter；
And/or, the polypropylene grafted modified unsaturated acids of the graft polypropylene or unsaturated acid anhydride are obtained
Grafted oligomers；
And/or, during the processing aid is antioxidant, coupling agent, nucleator, antitack agent and lubricant
One or more.
3. lithium ion battery plastic casing as claimed in claim 2, it is characterised in that the high knot
The mass ratio of crystal polypropylene, HOPP and COPP is 1:1:1；
And/or, the polyacrylic melt flow rate (MFR) is 1-3g/10min；
And/or, the graft polypropylene be polypropylene grafted maleic acid, itaconic acid grafted polypropylene, poly- third
Alkene graft acrylic acid, polypropylene grafted maleic anhydride or polypropylene grafted glycidyl acrylate；
And/or, the percent grafting of the graft polypropylene is 0.3-1.2%, and melt flow rate (MFR) is
50-120g/10min；
And/or, the processing aid is one or more in antioxidant, antitack agent and lubricant.
4. lithium ion battery plastic casing as claimed in claim 1, it is characterised in that described modified
The raw material components of polypropylene material also include fire retardant, and the fire retardant is bromide fire retardant.
5. lithium ion battery plastic casing as claimed in claim 4, it is characterised in that described fire-retardant
Agent is one or more in TDE, decabromodiphenyl oxide and brominated styrene；
And/or, the consumption of the fire retardant is 15-35%, and the percentage accounts for institute for the quality of fire retardant
State the percentage of each raw material components gross mass of modified polypropylene material；
And/or, the raw material components of the modified polypropylene material also include fire retarding synergist.
6. lithium ion battery plastic casing as claimed in claim 5, it is characterised in that described fire-retardant
The consumption of agent is 15-22.5%；
And/or, the fire retarding synergist be antimony oxide, antimony pentoxide and Firebrake ZB in one kind or
It is various；
And/or, the consumption of the fire retarding synergist is 1-10%, and the percentage is the matter of fire retarding synergist
Amount accounts for the percentage of each raw material components gross mass of the modified polypropylene material.
7. lithium ion battery plastic casing as claimed in claim 6, it is characterised in that described fire-retardant
The consumption of agent synergist is 4.5-7.5%；
And/or, the fire retardant is 3 with the mass ratio of the fire retarding synergist:1.
8. a kind of lithium ion battery, which includes that a battery plastics housing, one are arranged on battery plastics housing
The safety valve of upper surface and the battery bag and electrolyte of battery plastics enclosure interior are sealed in, its feature
It is that the battery plastics housing is the lithium ion battery plastic casing described in any one of claim 1-7.
9. a kind of manufacture method of lithium ion battery as claimed in claim 8, it is characterised in that institute
The manufacture method stated comprises the steps：
(1) by the modified polypropylene material described in any one of claim 1-7 from the hopper of injection machine
In adding barrel, heating melting forms melt, then melt is expelled to body and die for cover plate respectively
Die cavity, pressurize, cooling, the demoulding respectively obtain body and cover plate；
(2) battery bag is placed in into the body interior, the cover plate is placed in into the body then
At opening, sweat soldering sealing, afterwards toward injection electricity in the lithium ion battery plastic casing after sealing
Solution liquid, then safety valve is installed in the safe valve opening of plastic casing upper surface, lithium is obtained final product Jing after forming and capacity dividing
Ion battery.
10. manufacture method as claimed in claim 9, it is characterised in that in step (1), described
The temperature of barrel is：Barrel back segment temperature 180-210 DEG C, barrel stage casing temperature 200-230 DEG C, before barrel
Duan Wendu 220-240 DEG C；
And/or, in step (1), the temperature of the melt is 200-230 DEG C；
And/or, in step (2), the sweat soldering is carried out according to following technological parameter：Hot melting temperature
300-320 DEG C, hot melt pressure 0.35-0.50MPa, hot molten time 10s, welding pressure 0.45-0.50MPa,
Weld interval 10-12s.
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| CN201510590685.4A CN106543551A (en) | 2015-09-16 | 2015-09-16 | A kind of lithium ion battery plastic casing, lithium ion battery and its manufacture method |
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| CN201510590685.4A CN106543551A (en) | 2015-09-16 | 2015-09-16 | A kind of lithium ion battery plastic casing, lithium ion battery and its manufacture method |
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| CN111319185A (en) * | 2020-03-23 | 2020-06-23 | 德红柜智能科技(厦门)有限公司 | Preparation method of high-barrier and high-swelling-resistance lithium ion battery shell |
| CN111600056A (en) * | 2020-05-15 | 2020-08-28 | 郑州仿弦新材料科技有限公司 | Preparation method of energy storage composite material structure battery |
| CN112705445A (en) * | 2020-12-04 | 2021-04-27 | 深圳市德塔工业智能电动汽车有限公司 | Manufacturing method of novel explosion-proof shell and novel explosion-proof shell |
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| CN111600056A (en) * | 2020-05-15 | 2020-08-28 | 郑州仿弦新材料科技有限公司 | Preparation method of energy storage composite material structure battery |
| CN111600056B (en) * | 2020-05-15 | 2021-10-29 | 郑州仿弦新材料科技有限公司 | Preparation method of energy storage composite material structure battery |
| CN112705445A (en) * | 2020-12-04 | 2021-04-27 | 深圳市德塔工业智能电动汽车有限公司 | Manufacturing method of novel explosion-proof shell and novel explosion-proof shell |
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Application publication date: 20170329 |