CN220367974U - Bag-making laminated battery cell of composite anode and production equipment - Google Patents
Bag-making laminated battery cell of composite anode and production equipment Download PDFInfo
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- CN220367974U CN220367974U CN202321990669.0U CN202321990669U CN220367974U CN 220367974 U CN220367974 U CN 220367974U CN 202321990669 U CN202321990669 U CN 202321990669U CN 220367974 U CN220367974 U CN 220367974U
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- 239000002131 composite material Substances 0.000 title claims abstract description 89
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 230000007246 mechanism Effects 0.000 claims abstract description 273
- 239000000463 material Substances 0.000 claims abstract description 106
- 238000012546 transfer Methods 0.000 claims abstract description 31
- 239000007888 film coating Substances 0.000 claims abstract description 25
- 238000009501 film coating Methods 0.000 claims abstract description 25
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 238000003475 lamination Methods 0.000 claims description 89
- 238000005520 cutting process Methods 0.000 claims description 52
- 238000007789 sealing Methods 0.000 claims description 19
- 238000013329 compounding Methods 0.000 claims description 17
- 238000000926 separation method Methods 0.000 claims description 11
- 238000012937 correction Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 230000007547 defect Effects 0.000 claims description 7
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 239000007774 positive electrode material Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 5
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000012797 qualification Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 66
- 238000002955 isolation Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 239000010405 anode material Substances 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000009823 thermal lamination Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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- 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
- H01M10/04—Construction or manufacture in general
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Materials Engineering (AREA)
Abstract
The utility model provides a bag-making laminated battery cell of a composite positive electrode and production equipment, which belong to the field of power batteries, wherein the equipment comprises a negative electrode sheet making mechanism, a positive electrode composite sheet making system, a conveying mechanism, a laminated transfer mechanism, a laminated system and an isolating film coating mechanism; the bag-making laminated battery cell comprises a negative electrode sheet material, a positive electrode composite bag-making unit sheet material and a peripheral-coated isolating film, wherein the negative electrode sheet material and the positive electrode composite bag-making unit sheet material are stacked in sequence of negative electrode-positive electrode-negative electrode … …; the method can effectively solve the problem of the fold of the isolating film under the high-speed condition of the large-size long battery cell, improves the product qualification rate, reduces the cost of equipment purchase, energy consumption, maintenance and the like, thereby reducing the production cost of the lithium ion battery and being capable of being popularized and applied in the field of battery manufacturing.
Description
Technical Field
The utility model relates to the field of power battery preparation, in particular to a bag-making laminated battery cell of a composite anode and production equipment.
Background
For large-size long cells, the zigzag lamination process has not been able to eradicate the situation of membrane wrinkles at high speeds. And the thermal lamination process can effectively solve the problem. Therefore, some manufacturers begin the process of laying out thermal composite laminates, i.e., bonding the pole pieces and separator together under certain conditions.
Because of the electrochemical properties of lithium ions and the relatively expensive materials of the positive electrode, the design principle of lithium ion batteries is that the negative electrode encases the positive electrode. Therefore, the thermal lamination process route is that the cathode is basically subjected to double-sided lamination at present, and the anode is selectively subjected to single-sided lamination or non-lamination according to the requirement.
In order to save the cost, the formula of the battery material is changed in the prior art, the content of the binder tends to be reduced, and under the high-speed condition, the composite effect of the cathode is always unstable, and the production efficiency and the qualification rate of equipment are affected.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide a bag-making laminated battery cell of a composite anode and production equipment, which can solve the problems.
Bag-making laminated battery cell production equipment of a composite anode, the equipment comprises:
the negative pole flaking mechanism is used for cutting the negative pole coiled material into negative pole flakes with a preset size;
the positive electrode composite sheet making system is used for cutting the composite positive electrode sheet and the isolating film into positive electrode composite bag-making type unit sheet materials with preset sizes;
the conveying mechanism is used for conveying the cut negative electrode sheet materials and the positive electrode composite bag-making unit sheet materials to the lamination station respectively;
the lamination transfer mechanism is used for transferring the conveyed negative electrode sheet materials and the conveyed positive electrode composite bag-making unit sheet materials to the lamination system respectively;
the lamination system comprises a deviation correcting mechanism and a lamination mechanism and is used for sequentially, alternately and orderly stacking the negative electrode sheet materials and the positive electrode composite bag-making unit sheet materials together and stacking the negative electrode sheet materials and the positive electrode composite bag-making unit sheet materials to a preset layer number;
and the isolating film coating mechanism is used for coating one or more circles of isolating films on the outer layers of the positive and negative electrode stacks stacked to a preset layer number to form the battery cell.
Further, the negative pole flaking mechanism comprises two negative pole coil stock material rollers, a negative pole cutting mechanism and a negative pole conveying roller; the two material rollers are arranged at the upstream of the negative electrode conveying mechanism of the conveying mechanism, and one material roller is used for one material roller; the negative electrode coil stock is conveyed to a negative electrode conveying mechanism through a negative electrode conveying roller; the negative electrode cutting mechanism is arranged at the feeding end of the negative electrode conveying mechanism and is used for cutting the negative electrode coiled material conveyed by the negative electrode conveying roller.
Further, the positive electrode composite film-making system comprises a positive electrode film-making mechanism, a separation film-making mechanism, a thermal composite mechanism, a separation film edge sealing mechanism and a separation film cutting mechanism I; the positive electrode sheet making mechanism with the double-layer structure comprises a positive electrode upper layer unreeling mechanism, a positive electrode lower layer unreeling mechanism, an upper layer cutting mechanism and a lower layer cutting mechanism which are transmitted by a positive electrode material roller, and the double-layer structure of the positive electrode sheet making mechanism alternately transmits positive electrode coiled materials; the isolating film sheet-making mechanism with the double-layer structure comprises an isolating film upper-layer unreeling mechanism and an isolating film lower-layer unreeling mechanism which are transmitted by isolating film material rollers, and isolating films output by the isolating film upper-layer unreeling mechanism and the isolating film lower-layer unreeling mechanism and positive electrode coil materials are synchronously transmitted into the thermal compounding mechanism; the thermal compounding mechanism adopts a double-roller thermal extrusion structure and is used for compounding the coated positive electrode sheet by hot-pressing adhesion; the thermal compounding mechanism coats the coated positive electrode sheet up and down under the condition of a first temperature; the width of the isolating film is larger than that of the positive electrode sheet; the isolating film edge sealing mechanism is used for extruding and bonding the upper isolating film layer and the lower isolating film layer which exceed the positive electrode sheet to finish edge sealing and bag making. The edge sealing and bag making process is completed at the second temperature.
Further, the conveying mechanism comprises a negative electrode conveying mechanism and a positive electrode conveying mechanism, and the negative electrode conveying mechanism and the positive electrode conveying mechanism are respectively arranged at two ends of the lamination transfer mechanism; visual detection units are arranged on the negative electrode conveying mechanism and the positive electrode conveying mechanism and are used for detecting the size and surface defects of the negative electrode sheet and the positive electrode composite bag-making type unit sheet.
Further, the lamination transfer mechanism adopts single-row bidirectional or multi-row bidirectional transmission and is used for receiving the negative electrode sheet materials and the positive electrode composite bag-making unit sheet materials which are conveyed by the negative electrode conveying mechanism and the positive electrode conveying mechanism, conveying the negative electrode sheet materials and the positive electrode composite bag-making unit sheet materials to a correction mechanism of a lamination system for correction, and transferring the corrected negative electrode sheet materials and positive electrode composite bag-making unit sheet materials to the lamination mechanism of the lamination system; the lamination mechanism of the lamination system is positioned at the downstream of the deviation rectifying mechanism and is used for stacking the rectified negative electrode sheet materials and the positive electrode composite bag-making unit sheet materials according to the sequence of negative electrode-positive electrode-negative electrode … … positive electrode-negative electrode.
Further, the isolating film coating mechanism is positioned at the downstream of the lamination mechanism of the lamination system and comprises an isolating film coating unit and a swinging pair roller unit, and the swinging pair roller unit moves in a reciprocating manner in the horizontal direction; and the battery cell is formed by paving an isolating film at a stacking station of the lamination mechanism and cladding the positive and negative electrode stacks.
The utility model also provides a bag-making laminated battery cell of the composite positive electrode, which comprises a negative electrode sheet material, a positive electrode composite bag-making unit sheet material and a peripheral coated isolating film, wherein the negative electrode sheet material and the positive electrode composite bag-making unit sheet material are stacked in sequence according to a negative electrode-positive electrode-negative electrode … … positive electrode-negative electrode; the positive composite bag-making unit sheet comprises a positive sheet, and an upper isolating film sheet and a lower isolating film sheet which are coated on the upper surface and the lower surface of the positive sheet; the bag-making type laminated battery cell is prepared by the bag-making type laminated battery cell production equipment.
Compared with the prior art, the utility model has the beneficial effects that: the problem of the fold of the isolating film under the high-speed condition of the large-size long battery cell can be effectively solved, the product percent of pass is improved, the cost of equipment purchase, energy consumption, maintenance and the like is reduced, the production cost of the lithium ion battery is reduced, and the lithium ion battery can be popularized and applied in the field of battery manufacturing.
Drawings
FIG. 1 is a schematic layout of a bag-making laminated cell production apparatus of the present utility model;
FIG. 2 is a schematic diagram of a negative pole tableting mechanism;
FIG. 3 is a schematic diagram of a positive composite tabletting system;
FIG. 4 is a schematic illustration of a positive composite bag-making cell sheet;
FIG. 5 is a schematic illustration of an initial position of the barrier film wrapping mechanism;
FIG. 6 is a schematic view of a separator wrapping mechanism for cutting at the end position;
FIG. 7 is a schematic diagram of a first cell structure;
FIG. 8 is a schematic diagram of a second end position of the wrapping mechanism for the separator;
FIG. 9 is a schematic diagram of a second cell structure;
FIG. 10 is a schematic view of an initial position of a mechanism for simultaneously stacking multiple positive and negative stacks with separator coating;
FIG. 11 is a schematic view of a cutting of the end position of a mechanism for simultaneously stacking a plurality of positive and negative electrode stacks with separator films;
fig. 12 is an apparatus flow diagram of a positive composite pouch-made laminated cell.
In the drawing the view of the figure,
1. a negative electrode sheet-making mechanism; 2. a negative electrode conveying mechanism; 3. a negative electrode sheet material; 4. a lamination transfer mechanism I; 5. a first negative electrode deviation correcting mechanism; 6. lamination mechanism I; 7. a lamination transfer mechanism II; 8. a second negative electrode deviation correcting mechanism; 9. lamination mechanism II; 10. lamination transfer mechanism III; 11. a negative electrode deviation correcting mechanism III; 12. lamination mechanism III; 13. a third isolating film coating mechanism; 14. a positive electrode deviation correcting mechanism III; 15. a second isolating film coating mechanism; 16. a second positive electrode deviation correcting mechanism; 17. a first isolating film coating mechanism; 18. a first positive electrode deviation correcting mechanism; 19. positive electrode composite bag-making type unit sheet material; 20. a positive electrode conveying mechanism; 21. the positive electrode composite sheet making system; 31. a negative electrode coil stock; 32. a negative electrode cutting mechanism; 33. a negative electrode conveying roller; 41. an upper layer unreeling mechanism of the positive electrode; 42. an upper layer cutting mechanism; 43. an upper layer unreeling mechanism of the isolating film; 44. a thermal compounding mechanism; 45. a positive electrode sheet; 46. the isolating film edge sealing mechanism; 47. a first isolating film cutting mechanism; 48. an isolating film lower layer unreeling mechanism; 49. a lower layer cutting mechanism; 50. an anode lower layer unreeling mechanism; 51. a top separator sheet; 52. a lower separator sheet; 61. a barrier film coating unit; 62. swinging the paired roller unit; 63. a second isolating film cutting mechanism; 70. a first cell structure; 71. a single turn of isolation film; 80. a second cell structure; 81. a separation membrane with a closed periphery; 91. and a third isolating film cutting mechanism.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be appreciated that "system," "apparatus," "unit," and/or "module" as used in this specification is a method for distinguishing between different components, elements, parts, portions, or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.
Bag-making type laminated cell production equipment
Referring to fig. 1, the apparatus comprises a negative electrode sheet making mechanism 1, a positive electrode composite sheet making system 21, conveying mechanisms (2 and 20), a sheet transferring mechanism (4/7/10), a sheet stacking system and a separation film coating mechanism (17/15/13).
Wherein the negative electrode sheet making mechanism 1 is used for cutting the negative electrode roll 31 into negative electrode sheets 3 with a predetermined size.
Specifically, referring to fig. 1 and 2, the negative electrode sheet making mechanism 1 on one side of the apparatus includes two rolls of negative electrode roll 31, a negative electrode cutting mechanism 32, and a negative electrode conveying roller 33. Two material rollers are arranged at the upstream of the negative electrode conveying mechanism 2 of the conveying mechanism, and one is used for preparing one; the negative electrode coil 31 is conveyed to the negative electrode conveying mechanism 2 through a negative electrode conveying roller 33; the negative electrode cutting mechanism 32 is arranged at the feeding end of the negative electrode conveying mechanism 2, and is used for cutting the continuous negative electrode coiled material 31 conveyed by the negative electrode conveying roller 33 into negative electrode sheet materials 3 with preset sizes through constant tension control.
Wherein, the positive electrode composite sheet-making system 21 is used for cutting the composite positive electrode sheet 45 and the isolating film into the positive electrode composite bag-making unit sheet 19 with a preset size.
Specifically, referring to fig. 1 and 3, the positive composite sheet making system 21 located on the other side of the apparatus includes a positive sheet making mechanism, a separator sheet making mechanism, a thermal composite mechanism 44, a separator banding mechanism 46, and a separator trimming mechanism one 47.
The double-layer positive pole flaking mechanism comprises a positive pole upper layer unreeling mechanism 41 and a positive pole lower layer unreeling mechanism 50 which are transmitted by a positive pole material roller, an upper layer cutting mechanism 42 and a lower layer cutting mechanism 49, and the double-layer structure of the positive pole flaking mechanism alternately conveys positive pole coiled materials.
The positive electrode sheet-making mechanism as shown in fig. 3 is divided into an upper layer and a lower layer, the upper layer cutting mechanism 42 cuts the upper layer sheet material, and the lower layer cutting mechanism 49 cuts the lower layer sheet material. The cut positive electrode sheet 45 is directly fed between two separator films in sequence and alternately.
The two layers of isolation films are respectively provided by an isolation film upper layer unreeling mechanism 43 and an isolation film lower layer unreeling mechanism 48. The two layers of isolating films clamp the cut positive electrode sheet 45 to be converged at the inlet of the thermal compounding mechanism 44, and the width of the isolating films is larger than that of the positive electrode sheet 45. Continuing downstream flow.
The isolating film sheet-making mechanism with the double-layer structure comprises an isolating film upper layer unreeling mechanism 43 and an isolating film lower layer unreeling mechanism 48 which are transmitted by isolating film material rollers, and isolating films output by the isolating film upper layer unreeling mechanism 43 and the isolating film lower layer unreeling mechanism 48 are synchronously transmitted into the thermal compounding mechanism 44 with positive electrode roll materials.
The thermal compounding mechanism 44 adopts a double-roller thermal extrusion structure and is used for thermally pressing, bonding and compounding the coated positive electrode sheet; the two separator films and the positive electrode sheet 45 are pressed and bonded together by the thermal compounding mechanism 44 at a first temperature.
The isolating film edge sealing mechanism 46 presses and bonds the upper isolating film and the lower isolating film which exceed the positive electrode sheet to finish edge sealing and bag making. Specifically, the isolating film edge sealing mechanism 46 extrudes the upper and lower isolating films beyond the periphery of the positive electrode sheet 45 again, so that the two isolating films are bonded together, namely an edge sealing and bag making process, and the edge sealing and bag making process is completed at the second temperature.
Wherein, the first isolating film cutting mechanism 47 is arranged at the downstream of the isolating film edge sealing mechanism 46 and is used for cutting the upper and lower isolating films coating the positive electrode sheet to form a 2+1 composite bag-making type unit sheet 19 with a preset size.
The conveying mechanism is used for conveying the cut negative electrode sheet 3 and the positive electrode composite bag-making type unit sheet 19 to the lamination station respectively.
Specifically, referring to fig. 1, the conveying mechanism comprises a negative electrode conveying mechanism 2 and a positive electrode conveying mechanism 20, and the negative electrode conveying mechanism 2 and the positive electrode conveying mechanism 20 are respectively arranged at two ends of the lamination transfer mechanism; and visual detection units are arranged on the negative electrode conveying mechanism 2 and the positive electrode conveying mechanism 20 and are used for detecting the size and surface defects of the negative electrode sheet 3 and the positive electrode composite bag-making unit sheet 19, and meanwhile, data recording is carried out, so that identification and tracing are facilitated. And conveying the qualified detected flakes to a tablet taking position of the lamination system, and directly removing the flakes detected to NG.
Further, a visual inspection unit of the positive electrode sheet 15 was added, and the surface defect of the positive electrode sheet 45 of the positive electrode composite bag-making unit sheet 19 was inspected on the positive electrode conveying roller, because after the separator was coated, the camera could not penetrate the separator to inspect the surface defect of the positive electrode sheet.
Wherein, lamination transfer mechanism (4/7/10) is used for respectively transferring negative pole piece material 3 and positive pole compound bag-making type unit piece material 19 of carrying to lamination system.
Specifically, the lamination transfer mechanism (4/7/10) adopts single-row bidirectional or multi-row bidirectional transmission, and is used for receiving the negative electrode sheet material 3 and the positive electrode composite bag-making unit sheet material 19 which are conveyed by the negative electrode conveying mechanism 2 and the positive electrode conveying mechanism 20, carrying out deviation correction by a deviation correcting mechanism (5/18, 8/16 and 11/14) of a lamination system, and transferring the corrected negative electrode sheet material 3 and the corrected positive electrode composite bag-making unit sheet material 19 to a lamination mechanism (6/9/12) of the lamination system; the lamination mechanism (6/9/12) of the lamination system is positioned at the downstream of the deviation rectifying mechanism (5/18, 8/16, 11/14) and is used for stacking the rectified negative electrode sheet material 3 and the positive electrode composite bag-making type unit sheet material 19 according to the sequence of negative electrode-positive electrode-negative electrode … … positive electrode-negative electrode.
The lamination system comprises a deviation rectifying mechanism and a lamination mechanism and is used for sequentially, alternately and orderly stacking the negative electrode sheet material 3 and the positive electrode composite bag-making type unit sheet material 19 together and stacking the negative electrode sheet material and the positive electrode composite bag-making type unit sheet material to a preset layer number. When the qualified sheet is fully distributed at the sheet taking position of the lamination system, the lamination transfer mechanism transfers the negative electrode sheet 3 and the positive electrode composite bag-making type unit sheet 19 to the corresponding deviation correcting mechanism in sequence, respectively and reciprocally to correct the deviation. In the example of fig. 1, in the case of three stations, the lamination transfer mechanism one 4 of the station one transfers the negative electrode sheet 3 and the positive electrode composite bag-making unit sheet 19 to the negative electrode correction mechanism one 5 and the positive electrode correction mechanism one 18 in a sequential, separate and reciprocating manner to correct the deviation. Similarly, the lamination transfer mechanism II 7 of the station II and the lamination transfer mechanism III 10 of the station III synchronously perform the same actions, and the corresponding positive and negative pole piece materials are transferred to the corresponding correction mechanisms respectively for correction. Film laying: the isolating film coating mechanism (17/15/13) firstly spreads a layer of isolating film on the lamination platform, and the isolating film is not cut off. Lamination: the lamination transfer mechanism (4/7/10) stacks the negative electrode sheet material 3 and the positive electrode composite bag-making type unit sheet material 19 together in sequence, in a staggered and orderly manner, and stacks the negative electrode sheet material and the positive electrode composite bag-making type unit sheet material to a preset layer number to finish lamination.
And the isolating film coating mechanism (17/15/13) is used for coating the outer layers of the positive and negative electrode stacks stacked to the preset layer number with one or more circles of isolating films to form the battery cell.
In particular, referring to fig. 5-11, the barrier film coating mechanism (17/15/13) is located downstream of the lamination mechanism (6/9/12) of the lamination system, and includes a barrier film coating unit 61, a swing pair roller unit 62, and a rotation mechanism not shown.
The rotating mechanism adopts the existing clamp and motor mechanism, and the rotating mechanism needs to be provided with a set of clamp and motor mechanism at both ends of the positive and negative electrode stacks because the rigidity of the battery cell is low and the flexibility is high, and the two ends simultaneously clamp and rotate coaxially.
The swing pair roller unit 62 reciprocates in the horizontal direction; and the insulating film is paved at a stacking station of the lamination mechanism (6/9/12) and covers the positive and negative electrode stacks to form the battery cell. Specifically, the film laying and film coating of the positive and negative electrode stacks are realized by transferring and swinging the separator film from the separator film coating unit 61 by the swinging pair roller unit 62.
And a second isolating film cutting mechanism 63 is arranged at the positive and negative electrode pile of the isolating film coating station and is used for cutting the isolating film at the coating finishing position to obtain a single cell structure.
In a specific example, one or more groups of lamination transfer mechanisms (4/7/10) are adopted, and three groups of lamination transfer mechanisms, namely a lamination transfer mechanism I4, a lamination transfer mechanism II 7 and a lamination transfer mechanism III 10 are preferably adopted; correspondingly, three groups of deviation correcting mechanisms (5/18, 8/16 and 11/14) of the lamination system are adopted, namely, a first negative electrode deviation correcting mechanism 5 and a first positive electrode deviation correcting mechanism 18 are arranged as a group and are respectively arranged at two end parts of one side of a first lamination transferring mechanism 4; the second anode deviation correcting mechanism 8 and the second anode deviation correcting mechanism 16 are a group and are respectively arranged at two end parts of one side of the second lamination transfer mechanism 7; the negative electrode deviation correcting mechanism III 11 and the positive electrode deviation correcting mechanism III 14 are arranged as a group and are respectively arranged at two end parts of one side of the lamination transfer mechanism III 10; the corresponding lamination mechanism (6/9/12) comprises three groups, namely lamination mechanism one 6, lamination mechanism two 9 and lamination mechanism three 12. The corresponding isolating film coating mechanism (17/15/13) comprises an isolating film coating mechanism I17, an isolating film coating mechanism II 15 and an isolating film coating mechanism III 13.
For the final bag-making laminated battery cell, referring to fig. 5-11, the coating mode of the peripheral isolating film can be different, and the anode and cathode stacks of each coating can also be different.
The number of the positive and negative electrode stacks of the single lamination can be one stack, two stacks and three stacks … …, and the mode of arranging one stack at a time is shown in fig. 5-9, and then the two used isolating film cutting mechanisms 63 are arranged one by one; FIGS. 10 and 11 are multiple stacks, with adjacent stacks of positive and negative electrodes being spaced apart and with equal number of cutting mechanisms being provided at the spacing and in the last stack; as shown in fig. 11, in addition to the second separator cutting mechanism 63, a third separator cutting mechanism 91 and a fourth separator cutting mechanism … … are provided in this order at intervals.
For the cladding mode, the final bag-making laminated cell shown in fig. 10 and 11, namely cell structure three, is provided with a layer of isolation film outside the top layer and the bottom layer; the final pouch-making laminated cell shown in fig. 5-7, cell structure one 70, has a layer of separator film on one side of the positive and negative stacks, outside of the top and bottom layers, and the other side is not, forming a non-closed single-turn separator film 71; the final bag-making laminated cell shown in fig. 8 and 9, namely, the second cell structure 80, is provided with a layer of isolation film outside the top layer and the bottom layer and on both sides of the positive and negative electrode stacks, so as to form an isolation film 81 with a closed periphery, and the number of layers of the isolation film can be single-layer or multi-layer.
The equipment can be provided with a single station or multiple stations for lamination production, each station can stack a single group or multiple groups of electric cores, and when one station for lamination finishes the current electric core production and transfers; or when one lamination station has a problem, the rest stations can still perform lamination. The output of the equipment is not affected. Moreover, each station can stack one group of cells at a time, and can stack two groups, three groups and four groups of … … cells, so that the production efficiency is improved; the composite anode material is adopted to solve the problem that the composite effect of the anode material is unstable when equipment is produced at high speed due to the chemical property of the material.
Bag-making laminated battery core of composite anode
1-11, the bag-making type laminated battery cell of the composite positive electrode comprises a negative electrode sheet material 3, a positive electrode composite bag-making type unit sheet material 19 and a peripheral coated isolating film, wherein the negative electrode sheet material 3 and the positive electrode composite bag-making unit sheet material 19 are stacked in sequence of negative electrode-positive electrode-negative electrode … …; referring to fig. 4, the positive electrode composite bag-making unit sheet 19 includes a positive electrode sheet 45 and upper and lower separator sheets 51 and 52 covering the positive electrode sheet 45 up and down; the bag-making type laminated battery cell is prepared by the bag-making type laminated battery cell production equipment.
The upper separator sheet 51 and the lower separator sheet 52 are heat-press sealed at both side edges of the positive electrode sheet 45.
The final bag-making laminated battery cell is of a battery cell structure with at least a top layer and a bottom layer coated by a single-layer or multi-layer isolating film.
Preparation method of bag-making type laminated battery cell
The preparation method of the bag-making laminated battery cell of the composite positive electrode adopts the production and preparation of the bag-making laminated battery cell of the composite positive electrode by the production equipment of the bag-making laminated battery cell of the composite positive electrode, and referring to fig. 12, the method comprises the following steps:
s1, preparing sheets, namely uniformly cutting the coiled materials into sheets with preset sizes through positive and negative pole sheet making mechanisms on two sides of bag-making type laminated battery cell production equipment.
And cutting and preparing the negative electrode sheet material 3 and the positive electrode composite bag-making unit sheet material 19 by a negative electrode sheet making mechanism 1 and a positive electrode composite sheet making system 21 on two sides of bag-making type laminated battery cell production equipment.
Wherein, the preparation of the positive electrode composite bag-making unit sheet 19 in the step S1 includes:
s11, synchronously feeding in a compound way, synchronously conveying the cut positive sheet, the continuous upper isolating film and the continuous lower isolating film to the thermal compounding mechanism 44 by the positive unreeling mechanism (41/50), the isolating film upper unreeling mechanism 43 and the isolating film lower unreeling mechanism 48,
s12, compounding and hot pressing, wherein the thermal compounding mechanism 44 carries out hot extrusion on the positive electrode sheet coated by the upper isolating film and the lower isolating film to realize compounding.
S13, sealing the edges of the isolating films, and extruding and bonding the upper isolating films and the lower isolating films which exceed the positive electrode sheet through the isolating film sealing mechanism 46 to finish sealing and bag making.
S14, cutting the isolating film, namely cutting the isolating film at the gap between the adjacent positive electrode sheets through an isolating film cutting mechanism I47 to obtain the positive electrode composite bag-making type unit sheet 19 with the preset size.
S2, conveying and detecting the sheet, wherein the cut negative electrode sheet 3/positive electrode composite bag-making unit sheet 19 enters a negative electrode conveying mechanism 2/positive electrode conveying mechanism 20, CCD size and surface defect detection is carried out on the negative electrode conveying mechanism 2/positive electrode conveying mechanism 20, the sheet with NG detection is directly removed, and the sheet with qualified detection continues to flow to a lamination station.
S3, correcting the deviation of the sheet, and when the negative electrode conveying mechanism 2 is fully covered with the qualified negative electrode sheet 3 and the positive electrode conveying mechanism 20 is fully covered with the qualified positive electrode composite bag-making type unit sheet 19, the lamination transfer mechanism (4/7/10) sucks the sheet of the corresponding station and transfers the sheet to the correction mechanism (5/18, 8/16 and 11/14) for correcting the deviation.
S4, paving a separation film, wherein the separation film coating mechanism pre-lays a layer of non-cutting separation film on the lamination platform.
S5, stacking sheets, namely, transferring corrected sheets from the corresponding correction mechanisms (5/18, 8/16 and 11/14) by a lamination transfer mechanism (4/7/10), and stacking the negative electrode sheets 3 and the positive electrode composite bag-making unit sheets 19 onto a pre-paved isolating film according to the sequence of negative electrode, positive electrode and negative electrode … … until the number of layers reaches a preset number.
Specifically, the negative electrode sheet 3 and the positive electrode composite bag-making unit sheet 19 are stacked on a layer of isolating film tiled by a lamination mechanism in the order of firstly negative electrode, then positive electrode, then negative electrode, then positive electrode … … and finally negative electrode, in sequence, in a staggered manner and in order.
S6, stacking and laminating the materials, wherein the isolating film coating mechanism is used for arranging isolating films on the outer surfaces of the negative electrode sheet 3 at least on the bottom layer and the top layer of the materials.
S7, cutting the membrane into cores, and cutting the isolating membrane to form a laminated battery core.
S8, repeating the steps S1-S7 to finish the preparation of the required number of the laminated electric cores.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (8)
1. The utility model provides a system bag type lamination electricity core production facility of composite anode which characterized in that, the equipment includes:
a negative electrode sheet-making mechanism (1) for cutting the negative electrode roll (31) into a negative electrode sheet (3) of a predetermined size;
the positive electrode composite sheet making system (21) is used for cutting the composite positive electrode sheet (45) and the isolating film into positive electrode composite bag-making unit sheet materials (19) with preset sizes;
the conveying mechanism is used for conveying the cut negative electrode sheet material (3) and the positive electrode composite bag-making unit sheet material (19) to the lamination station respectively;
the lamination transfer mechanism (4/7/10) is used for transferring the conveyed negative electrode sheet material (3) and the conveyed positive electrode composite bag-making unit sheet material (19) to the lamination system respectively;
the lamination system comprises a deviation rectifying mechanism and a lamination mechanism and is used for sequentially, alternately and orderly stacking the negative electrode sheet materials (3) and the positive electrode composite bag-making unit sheet materials (19) together and stacking the negative electrode sheet materials and the positive electrode composite bag-making unit sheet materials to a preset layer number;
and the isolating film coating mechanism (17/15/13) is used for coating one or more circles of isolating films on the outer layers of the positive and negative electrode stacks stacked to a preset layer number to form the battery cell.
2. The pouch-making laminated cell production apparatus of claim 1, wherein:
the negative pole flaking mechanism (1) comprises two material rollers of a negative pole coil material (31), a negative pole cutting mechanism (32) and a negative pole conveying roller (33); the two material rollers are arranged at the upstream of the negative electrode conveying mechanism (2) of the conveying mechanism, and one material roller is used for one material roller; the negative electrode coil stock (31) is conveyed to the negative electrode conveying mechanism (2) through a negative electrode conveying roller (33); the negative electrode cutting mechanism (32) is arranged at the feeding end of the negative electrode conveying mechanism (2) and is used for cutting the negative electrode coiled material (31) conveyed by the negative electrode conveying roller (33).
3. The pouch-making laminated cell production apparatus of claim 1, wherein:
the positive electrode composite film-making system (21) comprises a positive electrode film-making mechanism, a separation film-making mechanism, a thermal composite mechanism (44), a separation film edge sealing mechanism (46) and a separation film cutting mechanism I (47);
the positive electrode sheet making mechanism with the double-layer structure comprises a positive electrode upper layer unreeling mechanism (41) and a positive electrode lower layer unreeling mechanism (50), an upper layer cutting mechanism (42) and a lower layer cutting mechanism (49), which are transmitted by a positive electrode material roller, wherein the double-layer structure of the positive electrode sheet making mechanism alternately transmits positive electrode coiled materials;
the isolating film sheet-making mechanism with the double-layer structure comprises an isolating film upper layer unreeling mechanism (43) and an isolating film lower layer unreeling mechanism (48) which are transmitted by isolating film material rollers, and isolating films output by the isolating film upper layer unreeling mechanism (43) and the isolating film lower layer unreeling mechanism (48) and positive electrode coil materials are synchronously transmitted into the thermal compounding mechanism (44);
wherein, the thermal compounding mechanism (44) adopts a double-roller thermal extrusion structure and is used for thermally pressing, bonding and compounding the coated positive electrode sheet;
the isolating film edge sealing mechanism (46) is used for extruding and bonding the upper isolating film layer and the lower isolating film layer which exceed the positive electrode sheet to finish edge sealing and bag making;
the first isolating film cutting mechanism (47) is arranged at the downstream of the isolating film edge sealing mechanism (46) and is used for cutting the upper isolating film and the lower isolating film which are coated with the positive electrode sheet to form the positive electrode composite bag-making type unit sheet material (19) with a preset size.
4. The pouch-making laminated cell production apparatus of claim 1, wherein:
the conveying mechanism comprises a negative electrode conveying mechanism (2) and a positive electrode conveying mechanism (20), and the negative electrode conveying mechanism (2) and the positive electrode conveying mechanism (20) are respectively arranged at two ends of the lamination transfer mechanism (4/7/10); visual detection units are arranged on the negative electrode conveying mechanism (2) and the positive electrode conveying mechanism (20) and are used for detecting the sizes and surface defects of the negative electrode sheet (3) and the positive electrode composite bag-making type unit sheet (19).
5. The pouch-making laminated cell production apparatus of claim 1, wherein:
the lamination transfer mechanism (4/7/10) adopts single-row bidirectional or multi-row bidirectional transmission and is used for receiving the negative electrode sheet material (3) and the positive electrode composite bag-making unit sheet material (19) which are conveyed by the negative electrode conveying mechanism (2) and the positive electrode conveying mechanism (20), carrying out deviation correction on the deviation correcting mechanisms (5/18, 8/16 and 11/14) of the lamination system, and transferring the corrected negative electrode sheet material (3) and positive electrode composite bag-making unit sheet material (19) to the lamination mechanism (6/9/12) of the lamination system; the lamination mechanism (6/9/12) of the lamination system is positioned at the downstream of the deviation rectifying mechanism (5/18, 8/16, 11/14) and is used for sequentially stacking the rectified negative electrode sheet material (3) and the positive electrode composite bag-making type unit sheet material (19) according to the positive electrode-negative electrode … … positive electrode-negative electrode.
6. The pouch-making laminated cell production apparatus of claim 1, wherein:
the isolating film coating mechanism (17/15/13) is positioned at the downstream of the lamination mechanism (6/9/12) of the lamination system, and comprises an isolating film coating unit (61) and a swinging pair roller unit (62), wherein the swinging pair roller unit (62) moves back and forth in the horizontal direction; and the insulating film is paved at a stacking station of the lamination mechanism (6/9/12) and covers the positive and negative electrode stacks to form the battery cell.
7. A bag-making laminated battery cell of a composite anode is characterized in that: the bag-making laminated battery cell comprises a negative electrode sheet material (3) and a positive electrode composite bag-making unit sheet material (19) which are stacked in a negative electrode-positive electrode-negative electrode … … positive electrode-negative electrode sequence, and a peripheral coated isolating film; wherein the positive electrode composite bag-making unit sheet material (19) comprises a positive electrode sheet material (45), and an upper isolating film sheet material (51) and a lower isolating film sheet material (52) which are used for covering the upper surface and the lower surface of the positive electrode sheet material (45); the bag-making laminated battery cell is prepared by the bag-making laminated battery cell production equipment according to any one of claims 1 to 6.
8. The pouch-making laminated cell of claim 7, wherein:
the upper isolating film sheet (51) and the lower isolating film sheet (52) are subjected to hot-pressing edge sealing on two side edges of the positive electrode sheet (45).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211114749.XA CN115411378A (en) | 2022-09-14 | 2022-09-14 | Bag-making type laminated battery cell of composite positive electrode, production equipment and preparation method |
| CN202211114749X | 2022-09-14 |
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| CN220367974U true CN220367974U (en) | 2024-01-19 |
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| CN202211114749.XA Withdrawn CN115411378A (en) | 2022-09-14 | 2022-09-14 | Bag-making type laminated battery cell of composite positive electrode, production equipment and preparation method |
| CN202321990669.0U Active CN220367974U (en) | 2022-09-14 | 2023-07-27 | Bag-making laminated battery cell of composite anode and production equipment |
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| CN202211114749.XA Withdrawn CN115411378A (en) | 2022-09-14 | 2022-09-14 | Bag-making type laminated battery cell of composite positive electrode, production equipment and preparation method |
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| CN101752607B (en) * | 2010-01-18 | 2012-05-02 | 深圳市吉阳自动化科技有限公司 | Lithium ion battery cell packet preparation method and system |
| JP7103291B2 (en) * | 2019-03-26 | 2022-07-20 | 株式会社豊田自動織機 | Electrode manufacturing equipment with separator and electrode manufacturing method with separator |
| CN113782838B (en) * | 2021-11-11 | 2022-03-15 | 深圳市兴禾自动化股份有限公司 | Cell thermal compounding manufacturing process |
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