CN113471503A - Lithium ion battery cell lamination equipment and lamination process - Google Patents
Lithium ion battery cell lamination equipment and lamination process Download PDFInfo
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- CN113471503A CN113471503A CN202010240484.2A CN202010240484A CN113471503A CN 113471503 A CN113471503 A CN 113471503A CN 202010240484 A CN202010240484 A CN 202010240484A CN 113471503 A CN113471503 A CN 113471503A
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- 238000003475 lamination Methods 0.000 title claims abstract description 67
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 64
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000008569 process Effects 0.000 title claims abstract description 41
- 238000007731 hot pressing Methods 0.000 claims abstract description 42
- 238000005520 cutting process Methods 0.000 claims abstract description 31
- 230000032258 transport Effects 0.000 claims abstract description 14
- -1 polypropylene carbonate Polymers 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 239000004954 Polyphthalamide Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 229920006375 polyphtalamide Polymers 0.000 claims description 3
- 229920000379 polypropylene carbonate Polymers 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 229920000166 polytrimethylene carbonate Polymers 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 230000007723 transport mechanism Effects 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims 2
- 238000013461 design Methods 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 6
- 238000010030 laminating Methods 0.000 description 19
- 230000007246 mechanism Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 238000004026 adhesive bonding Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
- H01M10/0404—Machines for assembling batteries
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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
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a lithium ion battery cell lamination device and a lamination process, wherein the lithium ion battery cell lamination device comprises a stacking module, a cutting module, a transportation module, a stacking and fitting module and a hot pressing module: the stacking module arranges the positive plates and the negative plates at intervals and hot presses the positive plates and the negative plates on one side surface of the diaphragm to form continuous stacking, or hot presses the positive plates on one side surface of the diaphragm and hot presses the negative plates on the corresponding positions of the other side surface of the diaphragm to form continuous stacking; the cutting module cuts the continuous stack into unit stacks; the transport module transports the cell stack in-line; the stacking and attaching module is used for stacking the units and the diaphragms to prepare a plurality of layers of stacked battery cores which are arranged in order in a stacking mode; and the hot-pressing module hot-presses the multilayer stacked battery cells to obtain the lithium ion battery cell. The equipment is simple in design, low in equipment cost and high in lamination precision, and the preparation efficiency and the yield of the lithium ion battery cell are effectively improved.
Description
Technical Field
The invention relates to the field of energy storage devices, in particular to lithium ion battery cell lamination equipment and a lamination process.
Background
Lithium ion batteries have become mainstream energy storage batteries in application scenes of current consumer electronics products, electric vehicles and the like due to the characteristics of high working voltage, large energy density, long cycle life, no memory effect and the like. At present, industries such as consumer electronics and electric vehicles are facing a fast growth stage, and the demand for lithium ion batteries is increasing dramatically. However, at present, the production efficiency of the lithium ion battery is low and the product yield is low due to the complex production process and the multiple working procedures of the lithium ion battery. In a plurality of procedures of lithium ion battery production, the cell assembly process is particularly important and mainly comprises a lamination assembly process and a winding assembly process, wherein the lamination assembly process has the advantages of effectively improving the safety, the energy density and the like in the production of the high-energy-density lithium battery due to the advantages of uniform stress of stacked pole pieces compared with the winding pole pieces, high utilization rate of the side edges of the cell, low internal resistance and the like, and has a development prospect.
The current mainstream application of the lithium ion battery lamination assembly process is divided into the following steps according to the process categories: z-type laminates and bag-type laminates. The Z-shaped lamination is to respectively die-cut or cut the positive and negative pole pieces of the lithium ion battery cell into single pieces, then the diaphragm moves in a Z-shaped mode, the diaphragm is folded each time, the mechanical arm grabs one battery cell pole piece and places the battery cell pole piece on the diaphragm, and finally a multilayer stacking structure taking the diaphragm-positive pole-diaphragm-negative pole as a unit is manufactured. (2) The bag-making type lamination process comprises the steps of firstly, thermally sealing the cut positive pole piece and the upper and lower diaphragms in the upper and lower diaphragms by adopting a thermal-sealing diaphragm mode, and completing the bag-making process. And secondly, cutting the diaphragm-anode-diaphragm unit obtained by bag making to form a bag type pole piece. And finally, grabbing the cut bag-type pole piece and the corresponding negative pole piece by a mechanical arm to form a multi-layer stacked structure taking the bag-type pole piece (diaphragm-positive pole-diaphragm) -negative pole as a unit.
For example, patent No. CN109244554A discloses a Z-shaped lamination apparatus for lithium ion battery and a process thereof, which adopts a Z-shaped lamination process to realize seamless butt joint between die cutting or cutting and the Z-shaped lamination, thereby omitting a pole piece transfer device and facility, and fixing the pole piece by using a hot-press compounding method.
For another example, patent No. CN201510734609.6 discloses a lithium ion battery lamination unit, a battery cell, a method for manufacturing the same, and a lithium ion battery, where the lithium ion battery lamination unit includes an inner electrode plate, a diaphragm, and an outer electrode plate with polarity opposite to that of the inner electrode plate, two side surfaces of the inner electrode plate are respectively bonded with the diaphragm through an adhesive, and an outer side surface of the diaphragm is bonded with the outer electrode plate through an adhesive.
For another example, patent No. CN201710643033.1 discloses a battery pole piece die-cutting bag-making and lamination integrated device, which includes a positive pole piece die-cutting mechanism, a negative pole piece die-cutting mechanism, a composite bag-making mechanism and a lamination mechanism, where the positive pole piece die-cutting mechanism and the negative pole piece die-cutting mechanism are respectively used for die-cutting the positive pole piece and the negative pole piece, the composite bag-making mechanism is used for making and packaging the positive pole piece after die-cutting is completed, and the lamination mechanism is used for stacking the positive pole piece after bag-making and packaged and the negative pole piece after die-cutting at intervals.
For another example, patent No. CN102760858A discloses a bag-making and laminating machine and a bag-making and laminating method, where the bag-making and laminating machine includes a bag-making system and a laminating system, and further includes a moving device, where a first control assembly in the moving device can control a first robot to move between the bag-making system and the laminating system, and the moving device directly moves a bag-making and laminating machine into the laminating system for lamination every time a bag-making system makes a bag-type pole piece.
The two lithium ion battery cell lamination processes have respective technical problems. The Z-shaped lamination process has the advantages that complex actions such as Z-shaped diaphragm moving and pole piece grabbing are involved, the overall design of equipment is complex, the number of required mechanical arms and roller control mechanisms is large, the equipment cost is high, the pole piece grabbing and placing efficiency is low, and the precision controllability is poor. In the bag-making type lamination process, because a gap exists between the pole piece and the diaphragm bag in the bag-making work, the pole piece moves to cause the final lamination precision to be reduced. In addition, the bag-making process finally needs to perform grabbing actions of the bag-type pole piece and the pole piece, so that the equipment cost and efficiency also have problems to be solved.
Therefore, there is a need to provide a new lithium ion battery lamination apparatus and lamination process to overcome the above-mentioned drawbacks of the prior art.
Disclosure of Invention
The first purpose of the invention is to provide lithium ion cell lamination equipment which is simple in design, low in equipment cost and high in lamination precision, and the preparation efficiency and the yield of lithium ion cells are effectively improved.
The second purpose of the invention is to provide a lithium ion cell lamination process, which has the advantages of simple process flow and high lamination precision, and effectively improves the preparation efficiency and the yield of the lithium ion cell.
In order to achieve the above object, the present invention provides a lithium ion battery cell lamination apparatus, which includes a stacking module, a cutting module, a transportation module, a stacking and fitting module, and a hot pressing module: the stacking module arranges the positive plates and the negative plates at intervals and hot presses the positive plates and the negative plates on one side surface of the diaphragm to form continuous stacking, or hot presses the positive plates on one side surface of the diaphragm and hot presses the negative plates on the corresponding positions of the other side surface of the diaphragm to form continuous stacking; the cutting module cuts the continuous stack into unit stacks; the transport module transports the cell stack in-line; the stacking and attaching module is used for stacking the units and the diaphragms to prepare a plurality of layers of stacked battery cores which are arranged in order in a stacking mode; and the hot-pressing module hot-presses the multilayer stacked battery cells to obtain the lithium ion battery cell.
Further, the cutting module comprises a transmission mechanism and a cutting die, the transmission mechanism bears and moves the continuous stacking, and the cutting die cuts the continuous stacking on the transmission mechanism.
Furthermore, the transportation module comprises an upper clamping crawler belt, a lower clamping crawler belt, an upper roller and a lower roller, the unit stacking clamp is arranged between the upper clamping crawler belt and the lower clamping crawler belt, the upper roller drives the upper clamping crawler belt to move, and the lower roller drives the lower clamping crawler belt to move.
The invention also provides a lithium ion cell lamination process, which comprises the following steps: (1) arranging the positive plates and the negative plates at intervals and hot-pressing the positive plates and the negative plates on one side surface of the diaphragm to form continuous stacking, or hot-pressing the positive plates on one side surface of the diaphragm and hot-pressing the negative plates on the corresponding positions of the other side surface of the diaphragm to form continuous stacking; (2) cutting the continuous stack into unit stacks; (3) transporting the stack of units in-line; (4) stacking the units and the diaphragms to obtain a plurality of layers of stacked battery cores which are arranged in order in a stacking mode; and (5) hot-pressing the multilayer stacked battery cell to obtain the lithium ion battery cell.
Further, the positive plate and the negative plate in the step (1) are hot-pressed on the diaphragm through a hot-pressing process, the hot-pressing time is 1-100 min, the hot-pressing temperature is 60-200 ℃, and the hot-pressing pressure is 0.1-1000 MPa; and (5) hot pressing time is 1-100 min, hot pressing temperature is 60-200 ℃, and hot pressing pressure is 0.1-1000 MPa.
Further, the diaphragm is processed by a surface gluing process, and glue used for surface gluing comprises one or more of polyvinylidene fluoride, polypropylene carbonate, polysiloxane, polyethylene oxide, polyphthalamide, polytrimethylene carbonate, polyethylene carbonate and polyethylene carbonate.
Further, if the positive plate and the negative plate are hot-pressed on one side surface of the diaphragm in the step (1), the unit stacking in the step (2) is divided into positive unit stacking and negative unit stacking, from bottom to top, wherein the positive unit stacking comprises the diaphragm and the positive plate, and the negative unit stacking comprises the diaphragm and the negative plate.
Further, if the positive electrode sheet is hot-pressed on one side surface of the diaphragm and the negative electrode sheet is hot-pressed on the other side surface of the diaphragm in the step (1), the unit stack in the step (2) sequentially comprises the negative electrode sheet, the diaphragm and the positive electrode sheet from bottom to top.
Further, if the positive plate and the negative plate are hot-pressed on one side surface of the diaphragm in the step (1), the positive unit stack and the negative unit stack are arranged at intervals in a stack form in the step (4), so as to obtain a neatly arranged multilayer stack, and then the diaphragm is attached to the upper surface of the multilayer stack to form the multilayer stack battery core.
Further, if the positive plate is hot-pressed on one side surface of the diaphragm and the negative plate is hot-pressed on the other side surface of the diaphragm in the step (1), the diaphragm and the unit stack are arranged at intervals in a stack form in the step (4), and a neatly arranged multilayer stack battery core is prepared.
Compared with the prior art, the lithium ion cell lamination equipment and the lamination process provided by the invention have the advantages that the design complexity, hardware investment and the like of the lamination equipment can be greatly reduced through the continuous stacking form of the positive and negative plates, the preparation efficiency and the yield of the lithium ion cell are effectively improved, and the lithium ion cell lamination equipment and the lamination process can be widely applied to the production of the lithium ion cell.
Drawings
Fig. 1 is a schematic diagram of a stacking module of a lithium ion battery lamination apparatus in embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of a cutting module of the lithium ion battery cell lamination apparatus in embodiment 1 of the present invention.
Fig. 3 is a schematic view of a transport module of a lithium ion battery cell lamination apparatus in embodiment 1 of the present invention.
Fig. 4 is a schematic diagram of stacking units in a transportation module and a stack attachment module of a lithium ion battery cell lamination device in embodiment 1 of the present invention.
Fig. 5 is a schematic diagram of a bonding unit of a stack bonding module of a lithium ion battery cell lamination apparatus in embodiment 1 of the present invention.
Fig. 6 is a schematic diagram of a stacking module of a lithium ion battery lamination apparatus in embodiment 2 of the present invention.
Fig. 7 is a schematic diagram of a conveying module and a laminating unit of a stack laminating module of a lithium ion battery cell laminating apparatus according to embodiment 2 of the present invention.
Fig. 8 is a schematic diagram of stacking units in a transport module and a stack attachment module of a lithium ion battery cell lamination device in embodiment 2 of the invention.
Fig. 9 is a schematic diagram of a laminating unit of a stack laminating module of a lithium ion battery cell laminating apparatus according to embodiment 2 of the present invention.
Detailed Description
The "ranges" disclosed herein are in the form of lower and upper limits. There may be one or more lower limits, and one or more upper limits, respectively. The given range is defined by the selection of a lower limit and an upper limit. The selected lower and upper limits define the boundaries of the particular range. All ranges that can be defined in this manner are inclusive and combinable, i.e., any lower limit can be combined with any upper limit to form a range. For example, ranges of 60-120 and 80-110 are listed for particular parameters, with the understanding that ranges of 60-110 and 80-120 are also contemplated. Furthermore, if the minimum range values 1 and 2 are listed, and if the maximum range values 3, 4, and 5 are listed, the following ranges are all contemplated: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In the present invention, all embodiments and preferred embodiments mentioned herein may be combined with each other to form a new technical solution, if not specifically stated.
In the present invention, all the technical features mentioned herein and preferred features may be combined with each other to form a new technical solution, if not specifically stated.
In the present invention, all the steps mentioned herein may be performed sequentially or randomly, if not specifically stated, but preferably sequentially.
Example 1
The invention provides lithium ion battery cell lamination equipment which comprises a stacking module, a cutting module 4, a transportation module, a stacking and fitting module and a hot pressing module.
Specifically, the stacking module arranges the positive electrode sheets 1 and the negative electrode sheets 3 at intervals and hot-presses the positive electrode sheets and the negative electrode sheets to one side of the separator 2 to form a continuous stack, as shown in fig. 1. The positive plate 1 and the negative plate 3 are hot-pressed on the diaphragm 2 through a hot-pressing process, the hot-pressing time is 1-100 min, the hot-pressing temperature is 60-200 ℃, and the hot-pressing pressure is 0.1-1000 MPa; the diaphragm 2 is processed by a surface gluing process, and glue used for surface gluing comprises one or more of polyvinylidene fluoride, polypropylene carbonate, polysiloxane, polyethylene oxide, polyphthalamide, polytrimethylene carbonate, polyethylene carbonate and polyethylene carbonate.
The cutting module 4 cuts the continuous stack into unit stacks, specifically, the cutting module 4 comprises a transmission mechanism 6 and a cutting die 5, the transmission mechanism 6 bears and moves the continuous stack, and the cutting die 5 cuts the continuous stack on the transmission mechanism 6. The unit is piled up and is divided into anodal unit and piles up 11 and negative pole unit and pile up 12, from the order up down, anodal unit piles up 11 and includes diaphragm 2 and positive plate 1, and negative pole unit piles up 12 and includes diaphragm 2 and negative pole piece 3.
The transportation module is stacked in an assembly line mode, the transportation module comprises an upper clamping crawler 8, a lower clamping crawler 9, an upper roller 7 and a lower roller 10, the unit stacking clamp is arranged between the upper clamping crawler 8 and the lower clamping crawler 9, the upper roller 7 drives the upper clamping crawler 8 to move, and the lower roller 10 drives the lower clamping crawler 9 to move. In the present embodiment, the positive electrode cell stack 11 and the negative electrode cell stack 12 are arranged at intervals.
The stacking and laminating module is arranged at the tail end of the transportation module, the units are sequentially stacked and enter the stacking and laminating module from the transportation module, the stacking unit 13 of the stacking and laminating module is used for stacking the anode units 11 and the cathode units 12 in a stacking mode at intervals, orderly-arranged multilayer stacking 14 is manufactured, the multilayer stacking 14 is sequentially transported through a transportation mechanism, and then the laminating unit of the stacking and laminating module is used for laminating a diaphragm 2 to the upper surface of the multilayer stacking 14 to form a multilayer stacking battery core 15. The number of layers in the multi-layer stack 14 depends on the cell capacity design.
The hot-pressing module is used for hot-pressing the multilayer stacked battery cell 15 to obtain the lithium ion battery cell, wherein the hot-pressing time is 1-100 min, the hot-pressing temperature is 60-200 ℃, and the hot-pressing pressure is 0.1-1000 MPa.
Example 2
A lithium ion cell lamination apparatus and lamination process is provided according to the method of example 1, with only the differences listed below:
in the stacking module, the positive electrode sheet 1 is hot-pressed on one side surface of the separator 2, and the negative electrode sheet 3 is hot-pressed on the other side surface of the separator 2 at corresponding positions to form a continuous stack, as shown in fig. 6. The unit stack 16 made by the cutting module 4 sequentially includes the negative electrode sheet 3, the separator 2, and the positive electrode sheet 1 from bottom to top, as shown in fig. 7. The stacking and attaching module stacks the diaphragm 2 and the units at intervals in a stacking manner to obtain a plurality of layers of stacked battery cores 15 which are arranged neatly. Specifically, first, as shown in fig. 7, the attaching unit of the stack attaching module attaches a separator 2 to the upper surface of the unit stack 16 on the transport module to form a new unit stack 17, and the transport module continues to transport the new unit stack 17 in line. Then, as shown in fig. 8, the stacking unit 13 of the stack attachment module is disposed at the rear end of the transport module, the unit stacks 17 sequentially enter the stacking unit 13 from the transport module, and the stacking unit 13 of the stack attachment module arranges the unit stacks 17 in a stack form, thereby producing a multi-layer stack 18 in alignment. As shown in fig. 9, the multi-layer stack 18 is sequentially transported in a production line by a transport mechanism, and then a separator 2 is attached to the lower surface of the multi-layer stack 18 by the attaching unit of the stack attaching module to form the multi-layer stack battery cell 15. The number of layers in the multi-layer stack 18 depends on the cell capacity design.
Compared with the prior art, the invention provides a lithium ion battery cell lamination device and a lamination process, a complex and complicated mechanical arm grabbing and roller control mechanism is replaced by a positive plate 3 and a negative plate 3 in a production line type continuous stacking mode, namely, the processes of stacking, cutting, transmitting, stacking, attaching and hot pressing are sequentially realized by adopting the production line type production process, the lithium ion battery cell lamination process is efficiently and stably realized, and the produced battery cell has the advantages of no pole piece migration and high alignment precision; the lithium ion battery cell lamination equipment is high in efficiency, simple in mechanical mechanism and low in equipment cost, the lithium ion battery cells obtained through production are high in alignment precision and flexible in battery cell stacking, the preparation efficiency and the yield of the lithium ion battery cells are effectively improved, and the equipment has wide application prospects. The lithium ion battery cell lamination equipment is applied to a lamination preparation process in a lithium ion battery cell production process, and the lithium ion battery cell can be used for consumer electronics products, power batteries for vehicles and the like.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (10)
1. A lithium ion cell lamination apparatus, comprising:
the stacking module is used for arranging the positive plates and the negative plates at intervals and hot-pressing the positive plates and the negative plates on one side surface of the diaphragm to form continuous stacking, or hot-pressing the positive plates on one side surface of the diaphragm and hot-pressing the negative plates on the corresponding positions of the other side surface of the diaphragm to form continuous stacking;
a cutting module that cuts the continuous stack into a unit stack;
a transport module that transports the cell stack in-line;
the stacking and attaching module is used for manufacturing a plurality of layers of stacked battery cores which are arranged in order by stacking the units and the diaphragms in a stacking mode; and
and the hot-pressing module is used for hot-pressing the multilayer stacked battery cells to manufacture the lithium ion battery cells.
2. The lithium ion cell lamination arrangement of claim 1, wherein the cutting module comprises:
a transport mechanism that carries and moves the continuous stack; and
a cutting die that cuts the continuous stack on the transport mechanism.
3. The lithium ion cell lamination apparatus of claim 1, wherein the transport module comprises:
the unit stacking clamp is arranged between the upper clamping crawler and the lower clamping crawler; and
the upper roller drives the upper clamping crawler to move, and the lower roller drives the lower clamping crawler to move.
4. A lithium ion battery cell lamination process is characterized by comprising the following steps:
(1) arranging the positive plates and the negative plates at intervals and hot-pressing the positive plates and the negative plates on one side surface of the diaphragm to form continuous stacking, or hot-pressing the positive plates on one side surface of the diaphragm and hot-pressing the negative plates on the corresponding positions of the other side surface of the diaphragm to form continuous stacking;
(2) cutting the continuous stack into unit stacks;
(3) transporting the stack of units in-line;
(4) stacking the units and the diaphragms to obtain a plurality of layers of stacked battery cores which are arranged in order in a stacking mode; and
(5) and hot-pressing the multilayer stacked battery cells to obtain the lithium ion battery cell.
5. The lithium ion battery cell lamination process according to claim 4, wherein in the step (1), the positive plate and the negative plate are hot-pressed on the separator through a hot-pressing process, the hot-pressing time is 1-100 min, the hot-pressing temperature is 60-200 ℃, and the hot-pressing pressure is 0.1-1000 MPa; and (5) hot pressing time is 1-100 min, hot pressing temperature is 60-200 ℃, and hot pressing pressure is 0.1-1000 MPa.
6. The lithium ion battery cell lamination process of claim 4, wherein the separator is treated by a surface sizing process, and the glue used for surface sizing comprises one or more of polyvinylidene fluoride, polypropylene carbonate, polysiloxane, polyethylene oxide, polyphthalamide, polytrimethylene carbonate, polyethylene carbonate and polyethylene carbonate.
7. The lithium ion cell lamination process according to claim 4, wherein if the positive electrode sheet and the negative electrode sheet are hot-pressed on one side of the separator in step (1), the cell stack in step (2) is divided into a positive electrode cell stack and a negative electrode cell stack in the order from bottom to top, the positive electrode cell stack including the separator and the positive electrode sheet, and the negative electrode cell stack including the separator and the negative electrode sheet.
8. The lithium ion battery cell lamination process according to claim 4, wherein if the positive plate is hot-pressed on one side of the separator and the negative plate is hot-pressed on the other side of the separator in the step (1), the unit stack in the step (2) sequentially comprises the negative plate, the separator and the positive plate from bottom to top.
9. The lithium ion battery cell lamination process of claim 7, wherein if the positive electrode sheet and the negative electrode sheet are hot-pressed on one side of the separator in step (1), the positive electrode unit stack and the negative electrode unit stack are arranged at intervals in a stack form in step (4), so as to obtain a neatly arranged multilayer stack, and then the separator is attached to the upper surface of the multilayer stack to form the multilayer stack battery cell.
10. The lithium ion battery cell lamination process of claim 8, wherein if the positive plate is hot-pressed on one side surface of the separator and the negative plate is hot-pressed on the other side surface of the separator in the step (1), the separator and the unit stack are arranged at intervals in a stack form in the step (4), so as to obtain the orderly-arranged multilayer stacked battery cell.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114566718A (en) * | 2022-02-28 | 2022-05-31 | 广汽埃安新能源汽车有限公司 | Cell lamination and hot pressing integrated device |
| CN115275370A (en) * | 2022-08-26 | 2022-11-01 | 楚能新能源股份有限公司 | Laminated battery cell production process and equipment |
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2020
- 2020-03-30 CN CN202010240484.2A patent/CN113471503A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114566718A (en) * | 2022-02-28 | 2022-05-31 | 广汽埃安新能源汽车有限公司 | Cell lamination and hot pressing integrated device |
| CN115275370A (en) * | 2022-08-26 | 2022-11-01 | 楚能新能源股份有限公司 | Laminated battery cell production process and equipment |
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