CN105703015A - Laminated lithium ion battery - Google Patents
Laminated lithium ion battery Download PDFInfo
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- CN105703015A CN105703015A CN201610213861.7A CN201610213861A CN105703015A CN 105703015 A CN105703015 A CN 105703015A CN 201610213861 A CN201610213861 A CN 201610213861A CN 105703015 A CN105703015 A CN 105703015A
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- lithium ion
- ion battery
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical class [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 239000011248 coating agent Substances 0.000 claims abstract description 47
- 238000000576 coating method Methods 0.000 claims abstract description 47
- 239000000853 adhesive Substances 0.000 claims abstract description 39
- 230000001070 adhesive effect Effects 0.000 claims abstract description 39
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 32
- 239000003792 electrolyte Substances 0.000 claims abstract description 8
- 238000007731 hot pressing Methods 0.000 claims abstract description 8
- 230000004888 barrier function Effects 0.000 claims description 48
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 5
- 239000007773 negative electrode material Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 4
- 239000011247 coating layer Substances 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 239000007774 positive electrode material Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 claims description 3
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical compound FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
- 239000004642 Polyimide Substances 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 229920002125 Sokalan® Polymers 0.000 claims description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 2
- 230000004913 activation Effects 0.000 claims description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 2
- 239000002985 plastic film Substances 0.000 claims description 2
- 229920006255 plastic film Polymers 0.000 claims description 2
- 229950000845 politef Drugs 0.000 claims description 2
- 239000004584 polyacrylic acid Substances 0.000 claims description 2
- 229920001721 polyimide Polymers 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 2
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 2
- 238000010586 diagram Methods 0.000 abstract description 11
- 238000005253 cladding Methods 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 16
- 150000004767 nitrides Chemical class 0.000 description 13
- 210000004027 cell Anatomy 0.000 description 9
- 239000005030 aluminium foil Substances 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000011889 copper foil Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052493 LiFePO4 Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000005955 Ferric phosphate Substances 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229940032958 ferric phosphate Drugs 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 2
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910002986 Li4Ti5O12 Inorganic materials 0.000 description 1
- 229910032387 LiCoO2 Inorganic materials 0.000 description 1
- 229910015020 LiNiCoAlO2 Inorganic materials 0.000 description 1
- 229910015009 LiNiCoMnO2 Inorganic materials 0.000 description 1
- 229910001228 Li[Ni1/3Co1/3Mn1/3]O2 (NCM 111) Inorganic materials 0.000 description 1
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- 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
Abstract
The invention provides a laminated lithium ion battery. The laminated lithium ion battery comprises a laminated core cladding, a shell and electrolyte; an adhesive coating is coated at the edge of coated and uncoated active matters on a negative plate; the adhesive coating is coated at the edge of the coated and uncoated active matters on a positive plate; the negative plate, a diaphragm and the positive plate are adhered into a whole through hot pressing; misplacing of the negative plate, the diagram and the positive plate of the laminated core cladding is prevented; and thus, the lithium ion battery is safe, high in reliability, low in cost, long in service life and high in power.
Description
Technical field
The present invention relates to a kind of technical field of lithium ion, be specifically related to a kind of stack type lithium ion battery。
Background technology
Lithium ion battery applications is in fields such as electric automobiles, it is necessary to possess high power, safety, long service life, characteristic that cost is low。
Lithium ion battery can be divided into stacked and takeup type core bag according to core pack arrangement。Comparing takeup type core bag, stacked core bag has simple in construction, and it is simple that core packs fabrication technique, the advantage that cost is low, but owing to not having extruding force between positive plate and barrier film, negative plate and barrier film, easily sliding at gravity or effect of vibration inferior pole piece, pole piece produces dislocation with barrier film, positive plate and negative plate dislocation, making negative plate can not cover positive plate, cause that surface, negative current collector uncoated areas produces Li dendrite, circulating battery reduces, even short circuit, cells burst or blast；When the dislocation of positive plate and negative plate is serious, positive pole and negative plate direct short-circuit, cause cells burst or blast。It addition, lithium ion battery is in charge and discharge use procedure, the material generation change in volume of positive and negative plate, positive and negative plate generation change in volume so that pole piece and membrane separation；The natural shrinking of barrier film, there is also negative plate and cannot cover positive plate, even with the risk of positive plate direct short-circuit。For preventing pole piece in core bag and barrier film dislocation, it is intended in membrane surface adhesive stripe-coating, make pole piece and barrier film bonding one, but the adhesive coated lithium ion via blocking barrier film of membrane surface, making the internal resistance of cell increase, large current discharging capability declines, and power is low。
Summary of the invention
It is an object of the invention to: for the lithium ion battery Problems existing of stacked core bag, a kind of new stacked core pack arrangement is provided, in positive plate and negative plate active matter coating edge adhesive stripe-coating coating, make the pole piece in core bag together with barrier film bonding through hot pressing, avoid stack type lithium ion battery pole piece and barrier film dislocation, thus improving stack type lithium ion battery safety, reliability and service life, power is high。
Embodiment according to the technology of the present invention, including stacked core bag, shell and electrolyte。Described stack type lithium ion battery is to be become stacked core bag, hot pressing by negative plate, barrier film, positive plate, barrier film cross laminates, then enters shell, sealing, note electrolyte, activation forms, it is characterised in that: the edge being positioned at coating and uncoated active matter on described negative plate has adhesive coated；The edge being positioned at coating and uncoated active matter on described positive plate has adhesive coated；The described negative plate of stacked core bag, barrier film and positive plate are bonded to one。
Further, the enclosure material of above-mentioned stack type lithium ion battery is selected from aluminum plastic film, rustless steel, aluminum, aluminium alloy, nickel-plated steel。
Further, the negative plate of above-mentioned stack type lithium ion battery is adhesive coated, in banding, is positioned at positive and negative, pole-piece pole-ear side or the positive and negative two sides in pole-piece pole-ear side and offside。
Further, the adhesive coated thickness of negative plate of above-mentioned stack type lithium ion battery is more than negative electrode active material coating layer thickness 0～0.5mm, and width is 1～5mm。
Further, the positive plate of above-mentioned stack type lithium ion battery is adhesive coated, in banding, is positioned at the positive and negative two sides of pole-piece pole-ear side and offside。
Further, the adhesive coated thickness of positive plate of above-mentioned stack type lithium ion battery is more than positive electrode active material coating layer thickness 0～0.5mm, and width is 1～5mm。
Further, the positive plate of above-mentioned stack type lithium ion battery and negative plate binding agent are at least one in vinylidene fluoride-hexafluoropropylene copolymer, Kynoar, politef, polyvinyl alcohol, polyimides, sodium carboxymethyl cellulose, carboxymethyl cellulose lithium, polyacrylic acid, butadiene-styrene rubber, the vinylidene of described vinylidene fluoride-hexafluoropropylene copolymer and the mass ratio of hexafluoropropene is 75～90: 10～25。
The invention have the characteristics that the binding agent being positioned at the edge coating being positioned at coating and uncoated active matter on coating and the binding agent of edge coating of uncoated active matter, positive plate on negative plate and barrier film stick into one, prevent the positive plate of stacked core bag, cathode pole piece and barrier film dislocation so that lithium ion battery safe and reliable property is high, cost is low, long service life and power height。
Other features and advantages of the present invention more fully present in described below。
Accompanying drawing explanation
Fig. 1, Fig. 2 are positive plate schematic diagram and the sectional view of adhesive stripe-coating coating respectively。
Fig. 3, Fig. 4 are at the negative plate schematic diagram of lug side and offside adhesive stripe-coating coating and sectional view respectively。
Fig. 5 is the negative plate sectional view in lug side adhesive stripe-coating coating。
Fig. 6, Fig. 7 are positive and negative electrode lugs at the stacked core bag schematic diagram of homonymy and sectional view respectively。
Fig. 8, Fig. 9 are positive and negative electrode lugs at the stacked core bag schematic diagram of full lug of heteropleural and sectional view respectively。
Figure 10 is stack type lithium ion battery schematic diagram。
Detailed description of the invention
Below by example with reference, the present invention is described in detail, simultaneously by the effect of the comparative illustration present invention。The following examples are only consistent with the example of the technology of the present invention content, and the content that present invention is limited only to described in following example is not described, the product manufactured according to this claim all belongs to present invention。
Fig. 1 and Fig. 2 is positive plate schematic diagram and the sectional view of adhesive stripe-coating coating respectively, positive plate 101 is in aluminium foil 102 positive and negative two sides coating positive-active nitride layer 104, and at pole-piece pole-ear 106 side and offside, be positioned on coating and the positive and negative two sides of aluminium foil 102 at the edge of uncoated active matter and be respectively applied adhesive coated 103 and 105, it is coated with slice width a1, thickness is all thick than positive-active nitride layer 104, exceedes positive electrode active material layer thickness b1。Fig. 3 and Fig. 4 is at the negative plate schematic diagram of lug side and offside adhesive stripe-coating coating and sectional view respectively, negative plate 201 is in Copper Foil or aluminium foil 202 positive and negative two sides coating negative electrode active nitride layer 204, and it is respectively applied adhesive coated 203 and 205 on lug 206 side and offside, the Copper Foil being positioned at the edge of coating and uncoated active matter or the positive and negative two sides of aluminium foil 202, it is coated with slice width a2, thickness is thicker than negative electrode active nitride layer 204, exceedes negative electrode active material layer thickness b2。Fig. 5 is the negative plate sectional view in lug side adhesive stripe-coating coating, negative plate 201 is only in Copper Foil or the aluminium foil 202 region positive and negative two sides adhesive stripe-coating coating 203 being positioned at coating and the edge of uncoated active matter near lug 206, it is coated with slice width a2, thickness is thicker than negative electrode active nitride layer 204, exceedes negative electrode active material layer thickness b2。Fig. 6 and Fig. 7 is positive and negative electrode lug at the stacked core bag schematic diagram of homonymy and sectional view respectively, and the stacked core bag 601 of two lug homonymies is by barrier film 602, negative plate 201, barrier film 602, positive plate 101 order cross laminates, and forms through hot pressing；Adhesive coated the 203 of negative plate 201 with 205 respectively with barrier film 602 together with A1, A2, A3 and A4 area bonded, adhesive coated the 103 of positive plate 101 with 105 respectively with barrier film 602 together with B1, B2, B3 and B4 area bonded, make together with negative plate 201 bonds with positive plate 101 by barrier film 602, make core be bundled into be integrated, it is to avoid the dislocation between positive plate, negative plate and barrier film。Fig. 8 and Fig. 9 is just respectively, negative lug is at the stacked core bag schematic diagram of full lug of heteropleural and sectional view, just, negative electrode lug is at core bag 801 offside, the stacked core bag 801 of two lug heteropleurals is by barrier film 602, negative plate 201, barrier film 602, positive plate 101 order cross laminates, and form through hot pressing, adhesive coated the 203 of negative plate 201 and 205 respectively with barrier film 602 at A1, A2, A3 and A4 area bonded is together, adhesive coated the 103 of positive plate 101 and 105 respectively with barrier film 602 at B1, B2, B3 and B4 area bonded is together, make together with negative plate 201 bonds with positive plate 101 by barrier film 602, make core be bundled into be integrated, avoid positive plate, dislocation between negative plate and barrier film。Figure 10 is stack type lithium ion battery schematic diagram, the visible anode ear of stack type lithium ion battery 1001 or post 1002, negative electrode lug or post 1003 form, stacked core bag 601 and shell 1004 form。
Embodiment 1
In order to the present invention is described, the present embodiment makes 22Ah1492220 cuboid lithium ion battery, as shown in Figure 10。Anode material for lithium-ion batteries generally adopts LiFePO4、LiNiCoMnO2、LiNiCoAlO2、LiMn2O4, LiCoO2 or two of which mixture, negative material adopts C, Li4Ti5O12, Si or its compound, Sn or its compound, electrolyte adopts 1.2MLiPF6+ EC+EMC, barrier film adopts PE film, PP film and PP/PE film。
Binding agent is made with Kynoar。In advance Kynoar is dissolved in N-Methyl pyrrolidone according to solid content 10%, is configured to Kynoar solution。
Adopt LiFePO4It is positive and negative electrode material with graphite C。Respectively LiFePO4With graphite C according to certain ratio dispensing, homogenate, application width according to design, it is coated on aluminium foil 102 and Copper Foil 202, coating width respectively 192mm and the 196mm of positive-active nitride layer 104 and negative electrode active nitride layer 204, rolls, then in the both sides of the edge adhesive stripe-coating coating 103,105,203 and 205 of positive and negative electrode pole piece active matter coating, positive plate adhesive coated 103 and 105 width is all 2mm, and 0.1mm thicker in positive-active nitride layer 104；Negative plate adhesive coated 203 and 205 width is all 2mm, and 0.1mm thicker in negative electrode active nitride layer 204, dry, the positive and negative plate of entire volume is die-cut to length to be 88mm and 90mm, positive pole ear 106 is 20 × 30mm respectively, negative lug 206 is the sheet of 20 × 30mm, makes positive plate 101 and cathode pole piece 201。PE barrier film, through corona pre-treatment, is cut into the membrane coil of wide 198mm, as barrier film 602。According to order, negative plate 201, barrier film 602, positive plate 101, the staggered core bag building up thickness 13mm of barrier film 602, make the core bag 601 of positive pole and negative lug homonymy through hot pressing, as shown in Figure 6。
Positive and negative electrode lug respectively with the aluminium pole ears with fluid sealant and nickel lug, adopt ultra-sonic welded together, put into aluminum plastic membrane shell, hot top seal, dry, inject 1.2MLiPF6+ EC+EMC electrolyte, hot side seal, chemical conversion, degassing and second heat side seal。With 11A current charges to 3.65V, constant voltage to 0.5A, 11A current discharge to the capacity of 2.5V be battery rated capacity；With 22A current charges to 3.65V, constant voltage to 0.5A, measure high-rate battery discharge ability with 100A heavy-current discharge to 2.5V test condition。Cell testing results: rated capacity is 22Ah；100A discharge capacity is 21.5Ah, is rated capacity 97.7%。Taking battery apart visible, the A1 of core bag, A2, A3, A4, B1, B2, B3 and B4 bond regions positive and negative plate bond with barrier film respectively, pole piece and barrier film dislocation-free phenomenon。
Embodiment 2
Make the positive and negative lug of core bag at lug 25Ah2614891 tertiary cathode square aluminum case lithium ion battery heteropleural, complete。Positive pole adopts LiNi1/3Co1/3Mn1/3O2, negative material is identical with embodiment 1, binding agent adopts vinylidene fluoride-hexafluoropropylene copolymer (mass ratio of vinylidene and hexafluoropropene is 85: 15), coating width respectively 83mm and the 85mm of positive-active nitride layer 104 and negative electrode active nitride layer 204, roll, then in the both sides of the edge adhesive stripe-coating coating 103,105,203 and 205 of positive and negative electrode pole piece active matter coating, positive plate adhesive coated 103 and 105 width is all 2mm, and 0.2mm thicker in positive-active nitride layer 104；Negative plate adhesive coated 203 and 205 width is all 2mm, and 0.2mm thicker in negative electrode active nitride layer 204, dry, the positive and negative plate of entire volume is die-cut to the sheet that length is 137mm and 139mm, the long 20mm of the full lug of positive pole 106, the long 20mm of the full lug of negative pole 206 respectively, makes positive plate 101 and cathode pole piece 201。PE barrier film, through corona pre-treatment, is cut into the membrane coil of wide 141mm, as barrier film 602。According to order, negative plate 201, barrier film 602, positive plate 101, the staggered core bag building up thickness 25.5mm of barrier film 602, make the core bag 801 of positive pole and negative lug heteropleural through hot pressing, as shown in Figure 8。The lug of core bag 801 core bag adopts laser weld to be connected with the positive and negative electrode pole of cover plate respectively, and core wraps into aluminum hull, and welded cover plate is sealed, and battery core is dried, and notes 1.2MLiPF6+ EC+EMC electrolyte, chemical conversion, seal liquid injection hole, complete battery and make。With 12A current charges to 4.15V, constant voltage to 0.5A, 12A current discharge to the capacity of 2.85V be battery rated capacity；High-rate battery discharge ability is measured to 0.5A, 100A heavy-current discharge to 2.85V test condition with 25A current charges to 4.15V, constant voltage。Cell testing results: rated capacity is 25Ah；100A discharge capacity is 24.6Ah, is rated capacity 98.4%。Taking battery apart visible, the A1 of core bag, A2, A3, A4, B1, B2, B3 and B4 bond regions positive and negative plate bond with barrier film respectively, pole piece and barrier film dislocation-free phenomenon。
Comparative example 1
Positive plate and negative plate do not have an adhesive stripe-coating coating, but adopt the adhesive coated PE barrier film of surface coating 0.002mm thickness Kynoar, make similar core bag 601, inside does not have the 22Ah1492220 ferric phosphate lithium cell of A and B bond regions。Battery raw material, pole piece size, manufacture method, rated capacity are identical with embodiment 1 with the measuring method of large current discharging capability。Cell testing results: rated capacity is 22Ah；100A discharge capacity is 14Ah, is rated capacity 56%。Taking battery apart visible, the whole active matter coating of positive and negative electrode pole piece of core bag bonds with barrier film respectively；A1, A2, A3, A4, B1, B2, B3 and B4 region pole piece and barrier film are non-caked, pole piece and barrier film dislocation-free phenomenon。
Comparative example 2
Positive plate and negative plate do not have adhesive stripe-coating coating, make the 22Ah1492220 ferric phosphate lithium cell of similar core bag 601。Battery raw material, pole piece size, manufacture method, rated capacity are identical with embodiment 1 with the measuring method of large current discharging capability。Cell testing results: rated capacity is 22Ah；100A discharge capacity is 21.4Ah, is rated capacity 97.2%。Taking battery apart visible, the positive and negative electrode pole piece of core bag is non-caked with barrier film, and pole piece and barrier film have dislocation sign。
Claims (6)
1. a stack type lithium ion battery, including stacked core bag, shell and electrolyte。Described stack type lithium ion battery is to be become stacked core bag, hot pressing by negative plate, barrier film, positive plate, barrier film cross laminates, then enters shell, sealing, note electrolyte, activation forms, it is characterised in that: the edge being positioned at coating and uncoated active matter on described negative plate has adhesive coated；The edge being positioned at coating and uncoated active matter on described positive plate has adhesive coated；The described negative plate of stacked core bag, barrier film and positive plate are bonded to one；Described shell is selected from aluminum plastic film, rustless steel, aluminum, aluminium alloy, nickel-plated steel。
2. a kind of stack type lithium ion battery according to claim 1, it is characterised in that: described negative plate is adhesive coated, in banding, is positioned at positive and negative two sides, pole-piece pole-ear side or the positive and negative two sides in pole-piece pole-ear side and offside。
3. a kind of stack type lithium ion battery according to claim 2, it is characterised in that: the adhesive coated thickness of described negative plate is more than negative electrode active material coating layer thickness 0～0.5mm, and width is 1～5mm。
4. a kind of stack type lithium ion battery according to claim 1, it is characterised in that: described positive plate is adhesive coated, in banding, is positioned at the positive and negative two sides of pole-piece pole-ear side and offside。
5. a kind of stack type lithium ion battery according to claim 4, it is characterised in that: the adhesive coated thickness of described positive plate is more than positive electrode active material coating layer thickness 0～0.5mm, and width is 1～5mm。
6. a kind of stack type lithium ion battery according to claim 1, it is characterized in that: described binding agent is at least one in vinylidene fluoride-hexafluoropropylene copolymer, Kynoar, politef, polyvinyl alcohol, polyimides, sodium carboxymethyl cellulose, carboxymethyl cellulose lithium, polyacrylic acid, butadiene-styrene rubber, the vinylidene of described vinylidene fluoride-hexafluoropropylene copolymer and the mass ratio of hexafluoropropene is 75～90: 10～25。
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| CN201610213861.7A CN105703015A (en) | 2016-04-01 | 2016-04-01 | Laminated lithium ion battery |
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|---|---|---|---|
| CN201610213861.7A CN105703015A (en) | 2016-04-01 | 2016-04-01 | Laminated lithium ion battery |
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| CN110165280A (en) * | 2019-05-29 | 2019-08-23 | 成都特隆美储能技术有限公司 | The lamination process and its battery of a kind of vibration resistance, long-life energy-storage battery |
| CN111162323A (en) * | 2019-12-30 | 2020-05-15 | 东莞维科电池有限公司 | Winding type lithium ion battery cell and preparation method thereof |
| CN111293315A (en) * | 2020-02-25 | 2020-06-16 | 东莞塔菲尔新能源科技有限公司 | Method for preventing electrode lug from being inserted reversely and reducing battery cell failure |
| CN111403820A (en) * | 2020-03-27 | 2020-07-10 | 湖北亿纬动力有限公司 | Core pack and manufacturing method thereof, single battery and manufacturing method and module thereof |
| CN111416100A (en) * | 2020-02-28 | 2020-07-14 | 合肥国轩高科动力能源有限公司 | Preparation method of battery cell |
| CN112366365A (en) * | 2020-01-16 | 2021-02-12 | 万向一二三股份公司 | Thermal composite laminated soft package lithium ion battery and preparation method thereof |
| CN112750973A (en) * | 2020-12-31 | 2021-05-04 | 蜂巢能源科技有限公司 | Pole piece unit and preparation method thereof |
| WO2021244672A1 (en) * | 2020-06-04 | 2021-12-09 | 江苏星源新材料科技有限公司 | Separator membrane, separator membrane roll, battery cell, and power lithium battery |
| CN113991159A (en) * | 2020-07-27 | 2022-01-28 | 泰星能源解决方案有限公司 | Secondary battery and method for manufacturing same |
| WO2022135151A1 (en) * | 2020-12-22 | 2022-06-30 | 华为技术有限公司 | Battery, electronic device, and mobile apparatus |
| CN114864859A (en) * | 2022-05-12 | 2022-08-05 | 浙江极氪智能科技有限公司 | Battery pole piece, battery core and battery |
| CN115832605A (en) * | 2021-12-01 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Diaphragm, battery module, battery pack, and electric device |
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| WO2024016447A1 (en) * | 2022-07-19 | 2024-01-25 | 宁德时代新能源科技股份有限公司 | Current collector, electrode sheet, battery cell, hot-pressing mold, battery, and electric device |
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| CN112366365A (en) * | 2020-01-16 | 2021-02-12 | 万向一二三股份公司 | Thermal composite laminated soft package lithium ion battery and preparation method thereof |
| CN111293315A (en) * | 2020-02-25 | 2020-06-16 | 东莞塔菲尔新能源科技有限公司 | Method for preventing electrode lug from being inserted reversely and reducing battery cell failure |
| CN111416100A (en) * | 2020-02-28 | 2020-07-14 | 合肥国轩高科动力能源有限公司 | Preparation method of battery cell |
| CN111403820A (en) * | 2020-03-27 | 2020-07-10 | 湖北亿纬动力有限公司 | Core pack and manufacturing method thereof, single battery and manufacturing method and module thereof |
| WO2021244672A1 (en) * | 2020-06-04 | 2021-12-09 | 江苏星源新材料科技有限公司 | Separator membrane, separator membrane roll, battery cell, and power lithium battery |
| CN113991159A (en) * | 2020-07-27 | 2022-01-28 | 泰星能源解决方案有限公司 | Secondary battery and method for manufacturing same |
| US11923560B2 (en) | 2020-07-27 | 2024-03-05 | Prime Planet Energy & Solutions, Inc. | Secondary battery having greater adhesion between electrode plate and separator closer to electrode terminal and method of manufacturing the same |
| WO2022135151A1 (en) * | 2020-12-22 | 2022-06-30 | 华为技术有限公司 | Battery, electronic device, and mobile apparatus |
| CN114725623A (en) * | 2020-12-22 | 2022-07-08 | 华为技术有限公司 | Battery, electronic device, and mobile device |
| CN112750973A (en) * | 2020-12-31 | 2021-05-04 | 蜂巢能源科技有限公司 | Pole piece unit and preparation method thereof |
| WO2023082290A1 (en) * | 2021-11-15 | 2023-05-19 | 宁德时代新能源科技股份有限公司 | Electrode assembly and method for manufacturing same, and battery cell, battery and electric apparatus |
| CN115832605A (en) * | 2021-12-01 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Diaphragm, battery module, battery pack, and electric device |
| CN115832605B (en) * | 2021-12-01 | 2023-10-10 | 宁德时代新能源科技股份有限公司 | Separator, battery module, battery pack, and electricity-using device |
| CN114864859A (en) * | 2022-05-12 | 2022-08-05 | 浙江极氪智能科技有限公司 | Battery pole piece, battery core and battery |
| WO2024016447A1 (en) * | 2022-07-19 | 2024-01-25 | 宁德时代新能源科技股份有限公司 | Current collector, electrode sheet, battery cell, hot-pressing mold, battery, and electric device |
| WO2024036752A1 (en) * | 2022-08-18 | 2024-02-22 | 江苏时代新能源科技有限公司 | Electrode assembly, battery cell, battery, and electrical apparatus |
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