CN111384362B - Electrode plate production equipment, production line and electrode plate processing method - Google Patents

Electrode plate production equipment, production line and electrode plate processing method Download PDF

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Publication number
CN111384362B
CN111384362B CN201811622082.8A CN201811622082A CN111384362B CN 111384362 B CN111384362 B CN 111384362B CN 201811622082 A CN201811622082 A CN 201811622082A CN 111384362 B CN111384362 B CN 111384362B
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electrode
current collector
heat
sealing
sealing strip
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CN111384362A (en
Inventor
何颖源
王子剑
陈永翀
孙晨宇
侯洋
张彬
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Haofengguang Energy Storage Chengdu Co ltd
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Beijing Hawaga Power Storage Technology Co ltd
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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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of 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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0409—Methods of deposition of the material by a doctor blade method, slip-casting or roller coating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/043—Processes of manufacture in general involving compressing or compaction
    • 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

Abstract

The invention provides electrode plate production equipment of a lithium slurry battery, which comprises a tabletting device, wherein the tabletting device comprises a material injection female die, a lower pressing male die, a first lower driving device, a first upper driving device, a material injection port and a material storage device. In the tabletting process, the first current collector borne by the bearing table is moved to a tabletting station, the injection female die is pressed down to the upper surface of the first current collector, the electrode material in the material storage device is injected into the injection female die through the injection port, and the pressing male die extends into the injection female die to press the electrode material, so that an electrode material layer of the electrode plate of the lithium slurry battery is formed. In addition, the electrode plate production equipment can also realize the processing operations of glue pressing, glue sealing (or heat sealing) and the like of the electrode plates, realize the automatic production of the electrode plates of the lithium slurry battery, improve the production efficiency, optimize the production quality and ensure the consistency of products. In addition, the invention also provides an electrode plate production line and a processing method of the electrode plate.

Description

Electrode plate production equipment, production line and electrode plate processing method
Technical Field
The invention relates to the field of lithium slurry batteries, in particular to electrode plate production equipment and production line of a lithium slurry battery and an electrode plate processing method.
Background
The lithium slurry battery is a novel lithium ion battery with low cost, long service life, high safety and easy recovery. The electrode plate of the lithium slurry battery contains an electrode material layer, wherein the electrode material contains conductive particles which are suspended or precipitated in electrolyte in a certain proportion, when the battery is impacted or vibrated from the outside, the conductive particles can locally move in the electrolyte to form a dynamic conductive network because the conductive particles are not bonded and fixed, and the electrode thickness of the lithium slurry battery can reach 10-50 times of that of the traditional lithium ion battery, so that the problems of battery capacity reduction, cycle life attenuation and the like caused by falling or loosening of the electrode material of the traditional lithium ion battery can be avoided.
Because the electrode plate structure and the electrode material layer of the lithium slurry battery are different from those of the traditional lithium ion battery, the production equipment and the processing method of the traditional lithium ion battery cannot be suitable for the production of the lithium slurry battery. Aiming at special requirements of electrode material layer forming, edge sealing and the like in the production of electrode plates of lithium slurry batteries, production equipment, production lines and processing methods suitable for automatic production of the lithium slurry batteries need to be provided.
Disclosure of Invention
Aiming at the problems, the invention provides electrode plate production equipment of a lithium slurry battery, which comprises a tabletting device, wherein the tabletting device comprises a material injection female die, a lower pressing male die, a first lower driving device for driving the material injection female die, a first upper driving device for driving the lower pressing male die, a material injection port and a material storage device. In the tabletting process, the first current collector borne by the bearing table moves to a tabletting station, the injection female die is pressed down to the upper surface of the first current collector, the electrode material in the storage device is injected into the injection female die through the injection port, and the pressing male die extends into the injection female die to press the electrode material, so that the non-bonding fixed electrode material layer of the electrode plate of the lithium slurry battery is formed. In addition, the automatic production of the electrode plates of the lithium slurry battery can be realized by the aid of the glue pressing device, the sheet pressing device and the pressing device (heat sealing device) of the electrode plate production equipment by enabling the plummer to pass through the glue pressing station, the sheet pressing station and the glue sealing station (or the heat sealing station), so that the production efficiency is improved, the production quality is optimized, and the consistency of products is guaranteed. In addition, the invention also provides an electrode plate production line comprising the electrode plate production equipment and a processing method of the electrode plate.
The technical scheme provided by the invention is as follows:
according to the invention, the electrode plate production equipment of the lithium slurry battery comprises a first current collector, a second current collector, an electrode material layer positioned between the first current collector and the second current collector, and a sealing strip arranged along the peripheral edges of the first current collector and the second current collector and used for sealing the electrode plate, and the electrode plate production equipment comprises a tabletting device positioned at a tabletting station. The sheeting apparatus includes: the material injection female die is of a plate-shaped structure with a through hole, and the through hole of the material injection female die is used for limiting the outline of the electrode material layer; the first lower driving device is connected with the injection female die and used for driving the injection female die to move up and down; the electrode material storage device comprises a material injection port and a material storage device, wherein the material storage device is used for storing an electrode material, the material injection port is connected to the material storage device through a pipeline, and the material injection port can inject the electrode material in the material storage device into a through hole of a material injection female die; the shape of the lower pressing convex die is matched with that of the through hole of the injection female die, so that the lower pressing convex die can extend into the through hole of the injection female die and compact the electrode material in the through hole of the injection female die; and the first upper driving device is connected with the lower pressing male die and used for driving the lower pressing male die to move up and down.
The first and second current collectors of the electrode sheet of the lithium slurry battery may be porous positive current collectors, or the first and second current collectors may be porous negative current collectors. The porous positive electrode current collector may be an electron conductive layer having a through hole structure and a thickness of 1 to 2000 μm, preferably 0.05 to 1000 μm, the pore diameter of the porous positive electrode current collector may be 0.01 to 2000 μm, preferably 10 to 1000 μm, and the through hole porosity may be 10 to 90%. The porous positive current collector can be a conductive metal layer, the conductive metal layer is a metal net or a metal wire woven net, and meshes can be square, rhombic, rectangular or polygonal; or the conductive metal layer is a foam metal net with a through hole structure; alternatively, the conductive metal layer is a porous metal plate or a porous metal foil, and the material of the conductive metal layer may be stainless steel, aluminum, silver, or the like. Or, the porous positive current collector can be carbon fiber conductive cloth or conductive cloth mixed by metal wires and organic fiber wires, the metal wires can be made of aluminum, alloy aluminum, stainless steel or silver, and the organic fiber wires can comprise one or more of natural cotton hemp, terylene, aramid fiber, nylon, polypropylene fiber, polyethylene, polytetrafluoroethylene and the like. Or, the porous positive current collector is a metal conductive layer, a conductive cloth, an inorganic non-metallic material, a porous organic material and the like, the surface of which is coated with a conductive coating or plated with a metal film, the conductive coating is a mixture of a conductive agent and a binder or the conductive coating is a mixture of a conductive agent, a positive active material and a binder, the mixing mode is bonding, spraying, evaporation, mechanical pressing and the like, the porous organic material comprises natural cotton-flax, terylene, aramid fiber, nylon, polypropylene fiber, polyethylene, polytetrafluoroethylene and the like, the inorganic non-metallic material comprises glass fiber non-woven fabric and ceramic fiber paper, the conductive agent is one or more of carbon black, ketjen black, graphene, carbon nanotubes, carbon fibers, amorphous carbon, metal conductive particles, metal conductive fibers and the like, the metal conductive particles or the metal conductive fibers can be aluminum, stainless steel, silver and the like, and the binder can be polyvinyl chloride, the surface of which is coated with a conductive coating or plated with a metal film, the conductive coating is a mixture of a conductive agent, the inorganic non-metallic active material and the positive active material and the porous organic material is a porous organic material which is bonded, the porous organic material which is coated with a mixture of natural cotton, the natural cotton, polyester fiber, the glass fiber, the inorganic non-metal-fiber, the inorganic non-metal-inorganic non-metal material, the inorganic non-metal material, the inorganic non-metal conductive material, the inorganic non-metal material and the inorganic non-metal conductive material, the inorganic non-conductive material are coated with the inorganic non-conductive material, the inorganic non-conductive material and the inorganic non-conductive material, the inorganic non-conductive material and the inorganic non-conductive material are coated with the inorganic non-conductive material, the inorganic non-conductive material and the inorganic non-conductive material are coated with the inorganic non-conductive material and the inorganic material are coated with the inorganic non-conductive material, the inorganic non-conductive material coated with the inorganic non-conductive, One or more of polyethylene, polypropylene, polystyrene, polytetrafluoroethylene, polyester terephthalate, polyamide, polyimide, polyether nitrile, polymethyl acrylate, polyvinylidene fluoride, polyurethane, polyacrylonitrile, styrene-butadiene rubber, sodium carboxymethylcellulose, modified polyolefin and the like. Alternatively, the porous positive electrode current collector is a combination of any two or more of the above. The porous negative current collector may be an electron conductive layer having a thickness of 1 to 2000 μm, preferably 0.05 to 1000 μm, with a through-hole structure, and the porous negative current collector may have a pore diameter of 0.01 to 2000 μm, preferably 10 to 1000 μm, and a through-hole porosity of 10 to 90%. The porous negative current collector can be a conductive metal layer, the conductive metal layer can be a metal net or a metal wire mesh grid, and meshes can be square, diamond, rectangular or other polygons; alternatively, the conductive metal layer may be a porous foam metal layer having a porous structure; alternatively, the conductive metal layer may be a porous metal plate or a porous metal foil, and the material of the conductive metal layer may be stainless steel, nickel, titanium, tin, copper, tin-plated copper, nickel-plated copper, or the like. Or the porous negative current collector can be carbon fiber conductive cloth or conductive cloth mixed by metal wires and organic fiber wires, and the metal wires can be made of stainless steel, nickel, titanium, tin, copper, tin-plated copper or nickel-plated copper and the like; the organic fiber yarn comprises one or more of natural cotton and hemp, terylene, aramid fiber, nylon, polypropylene fiber, polyethylene and polytetrafluoroethylene. Or, the porous negative current collector may be a metal conductive layer with a conductive coating or a metal film coated thereon, a conductive cloth, an inorganic non-metallic material, a porous organic material, the conductive coating may be a composite of a conductive agent and a binder or a conductive agent, a negative active material and a binder, the composite mode may be bonding, spraying, evaporation, mechanical pressing, or the like, the porous organic material may include natural cotton, polyester, aramid, nylon, polypropylene, polyethylene, polytetrafluoroethylene, or the like, the inorganic non-metallic material may include glass fiber non-woven fabric, ceramic fiber paper, or the like, the conductive film may be stainless steel, nickel, titanium, tin, copper, tin-plated copper, nickel-plated copper, or the like, the conductive agent may be one or more of carbon black, ketjen black, graphene, carbon nanotubes, carbon fibers, amorphous carbon, metal conductive particles, and metal conductive fibers, the metal conductive particles or the metal conductive fibers can be made of stainless steel, nickel, titanium, tin, copper, tin-plated copper or nickel-plated copper and the like, and the binder can be one or more of polyvinyl chloride, polyethylene, polypropylene, polystyrene, polytetrafluoroethylene, polyterephthalate, polyamide, polyimide, polyether nitrile, polymethyl acrylate, polyvinylidene fluoride, polyurethane, polyacrylonitrile, styrene-butadiene rubber, sodium carboxymethylcellulose and modified polyolefin. Alternatively, the porous negative electrode current collector may be a combination of any two or more of the above.
The electrode material layer can be a dry or semi-dry positive electrode material layer or a dry or semi-dry negative electrode material layer, and a porous structure for fluid to pass through is formed due to gaps among the dry or semi-dry electrode active conductive particles. For example, in a lithium slurry battery, the packed porosity of the non-adhesively secured positive active conductive particles and/or the non-adhesively secured negative active conductive particles can be greater than 5% and less than 60%. In the case of being immersed in the electrolytic solution, the non-adhesively fixed positive electrode active conductive particles and/or the non-adhesively fixed negative electrode active conductive particles can move in the electrolytic solution and form a positive electrode slurry and/or a negative electrode slurry, respectively. The mass ratio of the positive electrode active conductive particles to the positive electrode slurry may be 10% to 90%, preferably 15% to 80%, and the mass ratio of the negative electrode active conductive particles to the negative electrode slurry may be 10% to 90%, preferably 15% to 80%. The average particle size of the positive active conductive particles can be 0.05-500 mu m, and the mass ratio of the positive active material to the conductive agent can be 20-98: 80-2; the average particle diameter of the negative active conductive particles may be0.05-500 μm, and the mass ratio of the negative electrode active material to the conductive agent can be 20-98: 80-2. The positive active material may be lithium iron phosphate, lithium cobalt oxide, lithium nickel oxide, lithium manganese oxide, lithium nickel cobalt aluminum oxide, lithium vanadium oxide, lithium manganese-based oxide (lithium manganese chromium oxide, lithium manganese cobalt oxide, lithium manganese nickel oxide, lithium manganese copper oxide), V [ LiM ] or ]O4(M ═ nickel or cobalt), polyatomic anion positive electrode material (VOPO)4NASICON, silicates, titanates, sulfates, borates, R-Li3Fe2(PO4)3、Li3FeV(PO4)3、TiNb(PO4)3、LiFeNb(PO4)3) Iron compounds, molybdenum oxides, and the like. The negative electrode active material can be carbon-based negative electrode materials, nitrides, silicon and silicides, tin-based oxides, selenides, alloy negative electrode materials, titanium oxides, transition group metal oxides, phosphides or metallic lithium and the like, the carbon-based negative electrode materials can comprise one or more of graphite, mesophase carbon microspheres, graphitized carbon fibers, amorphous carbon materials, soft carbon, hard carbon, fullerene, carbon nanotubes, carbon-cobalt composites, carbon-tin composites, carbon-silicon composites and the like, the alloy negative electrode materials can comprise one or more of tin-based alloys, silicon-based alloys, antimony-based alloys, germanium-based alloys, aluminum-based alloys, lead-based alloys and the like, and the transition group metal oxides can comprise one or more of cobalt oxides, nickel oxides, copper oxides, iron oxides, chromium oxides, manganese oxides and the like. The conductive agent can be one or more of carbon black, ketjen black, graphene, carbon nanotubes, carbon fibers, amorphous carbon, metal conductive particles and metal conductive fibers. The material of the metal conductive particles or fibers can be aluminum, stainless steel, silver or the like.
The sealing strip can be made of insulating electrolyte-resistant polymer material, and the polymer material can be one or more of polyvinyl chloride, polyethylene, polypropylene, polystyrene, polytetrafluoroethylene, polyester terephthalate, polyamide, polyimide, polyether nitrile, polymethyl acrylate, polyvinylidene fluoride, polyurethane, polyacrylonitrile, styrene butadiene rubber, sodium carboxymethylcellulose, modified polyolefin and the like. The material of the sealing strip can also be hot melt adhesive, such as Polyamide (PA), Polyester (PES), polyethylene (LDPE and HDPE), polypropylene (PP), polyester amide (PEA) and the like which can be melted in the temperature range of 160-180 ℃ (material confirmation).
The first lower driving device and the first upper driving device of the tablet pressing device can be, for example, driving cylinders, servo motors and the like. Through the drive of first drive arrangement down, annotate the material die and can push down to on arranging the first mass flow body on the plummer in. Through drive arrangement's drive on the first, the terrace die pushes down can stretch into to annotate and carry out pre-compaction and compaction to electrode material in the through-hole of material die, thereby the terrace die pushes down can realize flattening of electrode material on the one hand and ensure that electrode material layer's thickness is even, and on the other hand can be with the gas outgoing in the electrode material layer. The shape of the lower pressing convex die corresponds to the shape of the through hole of the injection female die, and the lower pressing convex die can be rectangular for example. In the preforming station, adopt the preforming mode of sprue cooperation concave-convex mould, promoted the speed of packing, reduced the raise dust to whole production efficiency has been improved. Heating elements can be arranged in the lower pressing convex die and/or the material injection concave die, so that the electrode material is heated in the process of compacting the electrode material, and the heating temperature range can be 180-220 ℃. The heating element can be an electrical heating element, for example, the electrical heating element can include an electromagnetic induction heating device, an electrical heating wire, an electrical heating plate, an electrical heating tape, an electrical heating cable, an electrical heating disk, an electrical heating couple, an electrical heating coil, an electrical heating rod, and the like. In the tabletting process, the electrode material is heated by the pressing convex die and/or the injection concave die, so that the electrode material can be more easily pressed and molded.
Before the electrode material is tabletted, a fixed sealing strip may be connected to the peripheral edge of the upper surface of the first current collector, so to avoid interference of the sealing strip on the first current collector on the downward pressing of the injection female die in the tabletting process, preferably, the injection female die includes a lower protrusion or a hollow through-hole inner sleeve, the lower protrusion is fixedly connected to the lower surface of the injection female die along the outer contour of the through-hole or integrally formed with the lower surface of the injection female die, the through-hole inner sleeve can be fixedly installed in the through-hole of the injection female die and extends downward from the through-hole, the height of the lower protrusion and the height of the through-hole inner sleeve extending downward from the lower surface of the injection female die are greater than or equal to the thickness of the sealing strip, and may be, for example, 0.5 to 1 mm. The lower protruding part and the through hole inner sleeve can be continuous annular bodies, and the thickness of the lower protruding part and the thickness of the through hole inner sleeve can be 0.5-10 mm.
The injection port of the tablet press can be moved horizontally by, for example, a robot, a rodless cylinder, a linear motor, or the like. The sprue can be narrow rectangular shape, and the length of sprue is roughly equal to the length of the through-hole of notes material die, through making the sprue remove along the width direction of the through-hole of notes material die, can pour into electrode material into the through-hole of notes material die evenly. The material injection port is connected with the material storage device through a pipeline, the material storage device can be internally provided with a quality control device, and the quality of the electrode material injected into the material injection female die can be accurately controlled through the quality control device.
The electrode sheet production equipment further comprises a bearing table, the upper surface of the bearing table can bear the electrode sheet, bearing table through holes or bearing table grooves are formed in the bearing table, and machining components such as heating portions can penetrate through the bearing table through holes or the bearing table grooves from below, so that the electrode sheet can be machined from below the bearing table. The bearing platform may be a single-layer platform, for example, a single-layer rectangular platform, and a rectangular bearing platform through hole having a size substantially equal to the outer contour of the sealing strip on the first current collector or four bearing platform grooves having a position substantially equal to the position of the sealing strip are formed on the rectangular platform. The plummer can also be double-deck platform, for example the lower floor is great rectangle platform and the upper strata is less rectangle platform, and the upper strata platform can be fixed in lower floor's platform, or the upper strata platform can slide on lower floor's platform thereby can be convenient for adjust the position of placing the electrode piece on the upper strata platform in through removing the upper strata platform. Rectangular bearing platform through holes with the size approximately equal to the outer contour size of the sealing strips on the first current collector or four bearing platform grooves with the positions approximately equal to the positions of the sealing strips can be formed on the upper layer platform and the lower layer platform. A plurality of plummer fixed connection are in conveyor, and conveyor is the revolving stage that can rotate or conveyor is the conveyer belt that can convey to can transport the plummer that bears the electrode slice next station from a station, realize the automated processing of electrode slice.
The electrode plate production equipment also comprises a glue pressing device positioned at the glue pressing station. The sizing process may precede the sheeting process, or the sizing process may follow the sheeting process. That is, the sealing strip may be fixedly connected to the peripheral edge of the first current collector, and then the electrode material layer may be pressed on the inner side of the sealing strip; alternatively, the electrode material layer may be pressed on the first current collector, and then the sealing strip may be fixedly attached to the outside of the electrode material layer. The adhesive pressing device may include: the vacuum chuck can be used for grabbing the sealing strip; the second upper driving device is connected with the vacuum chuck and used for driving the vacuum chuck to move up and down; and the second upper driving device is connected to the horizontal moving device so as to realize the horizontal movement of the second upper driving device. The horizontal movement means may be, for example, a rodless cylinder, a linear motor, a ball screw, or the like. In the glue pressing process, the sealing strip with the lower surface coated with glue can be grabbed by the vacuum chuck, then the sealing strip is moved to the upper side of the bearing table by the horizontal moving device, and then the vacuum chuck is driven by the second upper driving device to move downwards, so that the sealing strip is adhered to the upper surface of the first current collector arranged on the bearing table. Therefore, the grabbing and the bonding of the sealing strip are realized in a reciprocating manner.
The glue pressing device may further include: the heating part of the glue pressing device is provided with a vertical heating plate, and the vertical heating plate can penetrate through the through hole or the groove of the bearing platform to heat a first current collector arranged on the bearing platform and a sealing strip arranged on the first current collector, so that the lower surface of the sealing strip is melted to fixedly connect the sealing strip with the first current collector; and the second lower driving device is connected with the heating part of the glue pressing device and is used for driving the heating part of the glue pressing device to move up and down. The heating part of the glue pressing device can be suitable for the condition that the material of the sealing strip is hot melt glue. In the glue pressing process, the sealing strip can be grabbed by the vacuum chuck, then the sealing strip is moved to the position above the bearing table by the horizontal moving device, and then the vacuum chuck is driven by the second upper driving device to move downwards, so that the sealing strip is arranged on the upper surface of the first current collector on the bearing table. Utilize drive arrangement to move up the rubber pressing device heating portion under the second for the vertical hot plate of rubber pressing device heating portion passes the plummer through-hole or the plummer slot of plummer from the below and contacts with the lower surface of first mass flow body, thereby transmits the heat from first mass flow body to the sealing strip and melts the lower surface of sealing strip, from this with sealing strip and first mass flow body fixed connection.
Electrode slice production facility still can include and be located the closing device who seals the station, and closing device includes: the pressing block can press the second current collector arranged on the upper surface of the sealing strip and the sealing strip so as to be in adhesive connection; and the third upper driving device is connected with the pressing block and used for driving the pressing block to move up and down. After the adhesive pressing process and the sheet pressing process of the electrode sheet are completed, the second current collector needs to be fixedly connected to the upper surface of the sealing strip, so that the electrode sheet is processed. After the plummer removed to gluing and seals the station, can glue at the upper surface of sealing strip, later arrange the second mass flow body in the upper surface of sealing strip, drive the briquetting through the third and move down and be used for pressing the upper surface of the second mass flow body to collect second mass flow body and sealing strip ground fixed connection closely.
The electrode sheet production apparatus may further include a first heat-seal device located at the first heat-seal station, the first heat-seal device including: a first upper heat-seal portion that is heatable and movable to an upper surface of the second current collector to melt an upper surface of the sealing strip under the second current collector to fixedly connect the second current collector and the sealing strip; and the fourth upper driving device is connected with the first upper heat-sealing part and used for driving the first upper heat-sealing part to move up and down. The heat sealing device is suitable for the condition that the material of the sealing strip is hot melt adhesive, and the heat sealing process can be used as a substitute for the glue sealing process. After the plummer removed to first heat-seal station, arrange the second mass flow body in the upper surface of sealing strip, through the first upper heat-seal portion of drive down movement of fourth on for heating the upper surface of the second mass flow body, collect the body through the second with heat transfer to sealing strip and with the upper surface melting of sealing strip to the realization is collected the body with the second and is closely fixed connection with the sealing strip. The first heat-seal device may further include: a first lower heat seal that is heatable and movable to a lower surface of the susceptor, the heat being transferred to the first current collector by passing the first lower heat seal through the susceptor through-hole or the susceptor groove or by the susceptor made of a heat conductive material; and the third lower driving device is connected with the first lower heat sealing part and used for driving the first lower heat sealing part to move up and down. The first upper heat seal portion and the first lower heat seal portion may have a flat plate-like, ring-like, or strip-like configuration, and are positioned and shaped to cover and heat the weatherstrip. When the first upper heat-seal land and the first lower heat-seal land are flat, the first upper heat-seal land and the first lower heat-seal land can dry the electrode material layer located inside the seal tape in addition to heat-melting the seal tape.
In order to adjust electrode plates with different sizes more flexibly and conveniently, a second heat sealing device can be arranged on the basis of the first heat sealing device. In this case, the first upper heat-seal sealing portion and the first lower heat-seal sealing portion of the first heat-seal device are respectively two parallel strip-shaped structures arranged along the length direction of the electrode sheet. In addition, the second heat seal device includes: the second upper heat-sealing part can be heated and can move to the upper surface of the second current collector so as to melt the upper surface of the sealing strip below the second current collector so as to fixedly connect the second current collector and the sealing strip, and the second upper heat-sealing part is of two parallel strip-shaped structures arranged along the width direction of the electrode plate; the fifth upper driving device is connected with the second upper heat sealing part and used for driving the second upper heat sealing part to move up and down; the second lower heat-sealing parts can be heated and can move to the lower surface of the bearing table, the second lower heat-sealing parts are of two parallel strip-shaped structures arranged along the width direction of the electrode plate, and the second lower heat-sealing parts can penetrate through the through holes or grooves of the bearing table to heat the first current collector; and the fourth lower driving device is connected with the second lower heat-sealing part and used for driving the second lower heat-sealing part to move up and down. The distance between two parallel strip structures arranged along the length direction of the electrode plate of the first upper heat-seal portion (the first lower heat-seal portion) can be adjusted as required, and the distance between two parallel strip structures arranged along the width direction of the electrode plate of the second upper heat-seal portion (the second lower heat-seal portion) can be adjusted as required, so that the electrode plate can adapt to electrode plates of various sizes.
In a preferred embodiment, the glue pressing device (glue pressing station) is located at the upstream of the sheet pressing device (sheet pressing station), the sheet pressing device (sheet pressing station) is located at the upstream of the pressing device (glue sealing station) or the heat sealing device (heat sealing station), and the electrode plate loaded with the electrode plate to be processed is conveyed to each station through the conveying device, so that the automatic production of the electrode plate is realized.
It should be noted that the directional terms upper, lower, left, right, etc. in the present invention are used for clarity of presentation only and do not serve as any limitation.
The invention also provides an electrode plate production line of the lithium slurry battery, which comprises the battery plate production equipment of the lithium slurry battery.
In addition, the invention also provides a processing method of the electrode plate production equipment of the lithium slurry battery. The processing method comprises the following tabletting steps: placing a first current collector on a bearing table, moving a material injection female die to the upper surface of the first current collector, and injecting an electrode material in a material storage device into a through hole of the material injection female die through a material injection port; and moving the pressing male die into the through hole of the material injection female die to compact the electrode material in the through hole of the material injection female die. The average thickness of the electrode material injected into the material injection female die can be 5-50 mm (the average thickness of the compacted electrode material layer can be 0.5-5 mm), the pressure range of the pressing male die can be 0.5-20 MPa, and the electrode plate production equipment can be used for preparing the thick electrode material layer in a simple and convenient mode. In order to ensure higher working efficiency and avoid the problem of dust or slurry splashing caused by an excessively high pressing speed, the pressing speed of the pressing male die is preferably 5-30 mm/s. Before the lower embossing die is pressed down, the electrode material in the through hole of the injection female die can be leveled by using the modes of vibration, strickling, pre-pressing and the like, so that the uniformity of the thickness of the electrode material layer can be better ensured.
If the sealing strip is fixedly connected with the first current collector and the second current collector in an adhesive manner, the processing method can further comprise a glue pressing step and a glue sealing step. In the glue pressing step, glue is applied to the lower surface of the sealing strip, the sealing strip is placed on the upper surface of the first current collector in a mode of surrounding the peripheral edge of the first current collector, and the sealing strip is fixedly connected with the first current collector. In the step of glue sealing, glue is coated on the upper surface of the sealing strip, the second current collector is placed on the sealing strip, and the sealing strip is fixedly connected with the second current collector.
If the sealing strip is fixedly connected with the first current collector and the second current collector in a mode of heating to melt the hot melt adhesive, the processing method can further comprise a glue pressing step and a heat sealing step. In the adhesive pressing step, a sealing strip is placed on the upper surface of the first current collector in a manner of surrounding the peripheral edge of the first current collector, and the lower surface of the sealing strip is melted by heating the first current collector and the sealing strip from below, so that the first current collector is fixedly connected with the sealing strip. In the step of glue sealing, the second current collector is placed on the sealing strip, the upper surface of the sealing strip is melted by heating the second current collector and the sealing strip from the upper side, and therefore the sealing strip is fixedly connected with the second current collector. In the glue pressing step and the heat sealing step, the heating temperature can be 40-300 ℃.
The invention has the advantages that:
1) the electrode plate production equipment comprises a glue pressing device, a tabletting device and a glue sealing (heat sealing) device, and is particularly suitable for production and processing of lithium slurry batteries, and a conveying device of the electrode plate production equipment can automatically convey electrode plates to a plurality of stations of sealing strip fixing, electrode material tabletting, edge sealing and the like, so that automatic production of the electrode plates of the lithium slurry batteries can be realized;
2) the production line arranged by the electrode plate production equipment has compact integral structure, space saving, higher automation and integration level;
3) the electrode plate processing method has good adaptability to variable product sizes, and can greatly improve the production consistency and the production efficiency of the electrode plate.
Drawings
Fig. 1(a) and 1(b) are schematic views of electrode tabs of a lithium slurry battery, wherein fig. 1(a) is an exploded schematic view of the electrode tabs, and fig. 1(b) is an assembled schematic view of the electrode tabs;
fig. 2 is a partial schematic view of an electrode sheet production apparatus according to the present invention;
fig. 3(a) and 3(b) are schematic views of a carrier table of an electrode sheet production apparatus according to the present invention, and fig. 3(a) and 3(b) respectively show different embodiments;
fig. 4 is a schematic view of a glue pressing device of the electrode sheet production apparatus according to the present invention;
FIG. 5 is a schematic view of a sheet press of an electrode sheet production apparatus according to the present invention;
fig. 6(a) and 6(b) are schematic views of a material injection female die of a tabletting device of an electrode sheet production apparatus according to the present invention, wherein fig. 6(a) is an exploded schematic view of the material injection female die, and fig. 6(b) is an assembled schematic view of the material injection female die;
fig. 7 is a schematic view of a first heat-seal device of the electrode sheet production apparatus according to the present invention;
fig. 8 is a schematic view of a second heat-seal device of the electrode sheet production apparatus according to the present invention;
fig. 9(a) -9(c) are schematic views of the heating section of the upper/lower heat seal device of the electrode sheet production apparatus according to the present invention, in which fig. 9(a) -9(c) respectively show different embodiments;
fig. 10 is a block diagram of an electrode sheet processing method according to an embodiment of the present invention;
fig. 11 is a block diagram of an electrode sheet processing method according to another embodiment of the present invention.
List of reference numerals
1-Positive plate
101-first porous Positive Current collector
102-second porous Positive Current collector
103-sealing strip
104-layer of Positive electrode Material
2-glue pressing device
201-rubber pressing device base body
202-vacuum chuck
203-second Upper drive device
204-horizontal moving device
205-glue pressing device heating part
206-second lower driving device
3-tabletting device
301-base of tabletting device
302-injection die
302 a-main body
302 b-inner sleeve with through hole
302 c-through hole
302 d-strip groove
302 e-bending resistance reinforcement
303-first lower drive
304-injection port
305-Down Press punch
306-first Upper Driving device
307-horizontal moving device
4-first Heat sealing device
401-first heat sealing device base
402-first Upper Heat seal portion
403 fourth Upper Driving device
404-first lower Heat seal land
405-third lower drive device
406-heating section
5-second Heat sealing device
501-second heat sealing device base
502-second Upper Heat seal portion
503 fifth Upper Driving device
504-second lower Heat seal
505-fourth lower driving device
6-rotating table
7-carrying platform
701-Carrier stage groove
702-Carrier through hole
Detailed Description
The invention will be further explained by embodiments in conjunction with the drawings.
Fig. 1(a) and 1(b) are schematic views of electrode tabs of a lithium slurry battery, wherein fig. 1(a) is an exploded schematic view of the electrode tabs, and fig. 1(b) is an assembled schematic view of the electrode tabs. Taking the positive electrode sheet 1 as an example, the positive electrode sheet 1 includes a first porous positive electrode collector 101, a second porous positive electrode collector 102, a sealing tape 103, and a positive electrode material layer 104. Four strip-shaped sealing strips 104 are arranged along the peripheral edge of the porous positive electrode current collector, and the positive electrode material layer 104 is arranged on the inner side of the sealing strip 103.
Fig. 2 is a partial schematic view of an electrode sheet production apparatus according to an embodiment of the present invention. The electrode plate production equipment comprises a glue pressing device 2, a tabletting device 3, a first heat sealing device 4, a second heat sealing device 5, a rotating table 6 and a bearing table 7. The plurality of bearing tables 7 are fixedly mounted on the rotating table 6, so that the bearing tables 7 can rotate to various stations along with the rotating table 6. The glue pressing device 2, the sheeting device 3, the first heat-seal device 4, and the second heat-seal device 5 are installed around the rotating table 6. Before the bearing table 7 enters the glue pressing station, a first current collector is placed on the bearing table; then, the bearing table carrying the first current collector is transferred to a glue pressing station, and the glue pressing device 2 fixedly connects the sealing strip to the upper surface of the first current collector; next, the bearing table is transferred to a tabletting station, and the tabletting device 3 is used for pressing an electrode material layer on the upper surface of the first current collector; then, the bearing table is transferred to a first heat-sealing station, a second current collector is placed above the sealing strips and the electrode material layer, and the first heat-sealing device 4 is used for hot-melting the two sealing strips along a first direction (for example, the length direction of the electrode plate), so that the sealing of the electrode plate along the first direction is realized; then, the bearing platform is transferred to a second heat-sealing station, and the second heat-sealing device 5 is used for hot-melting the two sealing strips along a second direction (for example, the width direction of the electrode plate), so that the electrode plate is sealed along the second direction; and finally, the bearing table carrying the prepared electrode plate is rotated out from the second heat-sealing station, the prepared electrode plate is taken down, and another first current collector can be placed on the empty bearing table. The multiple electrode plates can be simultaneously processed at different stations by the multiple bearing platforms, uninterrupted continuous production is carried out, and therefore production efficiency is greatly improved.
Fig. 3(a) and 3(b) are schematic views of a carrier table of an electrode sheet production apparatus according to the present invention, and fig. 3(a) and 3(b) respectively show different embodiments. In fig. 3(a), the susceptor is a double-deck stage, the lower deck is a large rectangular stage, the upper deck is a small rectangular stage, the upper smaller rectangular stage is mounted on the upper surface of one end of the lower rectangular stage, and the lower surface of the other end of the lower rectangular stage is mounted on the turntable. Four bearing platform grooves 701 are respectively arranged at corresponding positions of the rectangular platform at the upper layer and the rectangular platform at the lower layer, namely: two parallel carrier grooves provided along the electrode sheet length direction X and two parallel carrier grooves provided along the electrode sheet width direction Y allow, for example, a vertically plate-like squeegee heating portion to protrude upward from the carrier grooves 701 and process the electrode sheet on the carrier from below. The electrode pads may be placed on an upper rectangular table with the position of the seal bar being substantially the same as the position of the carrier table groove 701. In fig. 3(b), the susceptor is a single-layer rectangular susceptor, a rectangular susceptor through hole 702 is provided at one end of the rectangular susceptor, and the lower surface of the other end of the rectangular susceptor is attached to the turntable. When the electrode sheet is placed on the carrier table, the middle portion of the electrode sheet substantially corresponds to the position of the carrier table through hole 702, thereby allowing, for example, the flat plate-like heat seal portion to heat and melt the seal strip of the electrode sheet on the carrier table or to dry the electrode material layer from below.
Fig. 4 is a schematic view of a glue pressing device of the electrode sheet production equipment according to the invention. As shown in fig. 4, the glue pressing device includes a glue pressing device base 201, a vacuum chuck 202, a second upper driving device 203, a horizontal moving device 204, a glue pressing device heating part 205, and a second lower driving device 206. The molding press base 201 may be, for example, L-shaped, the second lower driving device 206 is mounted on the horizontal base of the molding press base 201, and the molding press heating part 205 is mounted on the second lower driving device 206, so that the molding press heating part 205 can move up and down. The horizontal moving device 204 is installed on the vertical seat body of the rubber pressing device seat body 201, the second upper driving device 203 is installed on the horizontal moving device 204, and the vacuum chuck 202 is installed on the second upper driving device 203, so that the vacuum chuck 202 can realize vertical movement and horizontal movement, and a series of actions such as grabbing the sealing strip at the sealing strip placing place, moving to the rubber pressing station to place the sealing strip, moving out of the rubber pressing station to grab the sealing strip again are completed. In the molding process, first, the vacuum chuck 202 grasps the sealing strip, and then the vacuum chuck 202 moves to above the molding device heating portion 205 by the horizontal moving device 204 such as a rodless cylinder, and at the same time, the carrier table carrying the first current collector is transferred between the vacuum chuck 202 and the molding device heating portion 205 (i.e., a molding station). The vacuum chuck 202 moves downward by the second upper driving device 203 such as an air cylinder driving device to place the sealing strip on the upper surface of the first current collector, the vacuum chuck 202 moves upward by the second upper driving device 203 and moves away from the adhesive pressing station by the horizontal moving device 204 to grab the next sealing strip, and at the same time, the adhesive pressing device heating part 205 moves upward by the second lower driving device 206 such as an air cylinder driving device to make the vertical heating plate pass through the bearing table groove of the bearing table from below and contact the lower surface of the first current collector, and the lower surface of the sealing strip is melted to fixedly connect the sealing strip with the first current collector. Next, the heating part 205 of the glue pressing device moves downward under the action of the second lower driving device 206, and the carrier platform moves to the next station.
Fig. 5 is a schematic view of a sheet pressing device of the electrode sheet production apparatus according to the present invention. The sheeting apparatus includes a sheeting apparatus base 301, a female injection mold 302, a first lower drive 303, an injection port 304, a magazine (not shown), a lower punch 305, and a first upper drive 306. The tablet press housing 301 can be, for example, a "C" shape, with the first upper driving device 306 mounted on the upper horizontal housing and the first lower driving device 303 mounted on the lower horizontal housing. The lower punch 305 is mounted to the first upper driving means 306 such that the lower punch 305 can move up and down, and the injection female die 302 is mounted to the first lower driving means 303 such that the injection female die 302 can move up and down. The horizontal moving device 307 such as a rodless cylinder is fixedly arranged on the injection female die 302 along the width direction of the through hole of the injection female die, the injection port 304 is arranged on the horizontal moving device 307, the length of the injection port 304 is approximately equal to the length of the through hole 302c of the injection female die, and the width of the injection port 304 is smaller than the width of the through hole 302c of the injection female die, so that the injection port 304 can move along the width direction of the through hole of the injection female die for injecting materials, and the problem of uneven thickness of electrode materials caused by single-point positioning injection is solved. The position of the lower punch 305 corresponds to the position of the through hole 302c of the injection female die, the shape of the lower punch 305 is matched with the shape of the through hole 302c of the injection female die, and the lower punch 305 can extend into the through hole 302c of the injection female die. In the sheeting process, first, the carrier table is turned to below the through hole 302c of the injection die of the sheeting apparatus (i.e., the sheeting station). The injection female die 302 is moved down to the upper surface of the first current collector on the carrier table by a first lower driving means 303 such as a cylinder driving means. The injection port 304 is moved to one side edge of the through-hole 302c of the injection female mold, and as the injection port 304 is horizontally moved in the width direction of the through-hole, a predetermined weight or a predetermined mass of the electrode material in the stocker is uniformly injected from the injection port 304 into the through-hole 302c of the injection female mold, after which the injection port 304 is removed from above the through-hole 302c of the injection female mold. The heating element in the lower punch 305 preheats the lower punch 305 to, for example, 180 c, and the lower punch 305 is extended downward into the through hole 302c of the injection female die by the first upper driving means 306 such as a cylinder driving means, and the pressure of the lower punch may be, for example, 13MPa, the pressing speed of the lower punch may be, for example, 10mm/s, and the compacted thickness of the electrode material layer may be, for example, 1.5 mm. And then, moving the pressing male die and the injection female die upwards, and transferring the bearing platform to the next station.
Fig. 6(a) and 6(b) are schematic views of a material injection female die of a tabletting device of an electrode sheet production apparatus according to the present invention, wherein fig. 6(a) is an exploded schematic view of the material injection female die, and fig. 6(b) is an assembled schematic view of the material injection female die. According to this embodiment, the injection molding die includes a plate-like body 302a and a hollow through-hole inner sleeve 302 b. The plate-like main body 302a may be provided with a through hole 302c, the plate-like main body 302a may be provided with a strip-shaped groove 302d for mounting the horizontal movement device 307, and at least one side edge of the plate-like main body 302a may be provided with a bending-resistance reinforcing portion 302e for increasing bending-resistance strength. The cross-sectional dimension of the inner wall of the through-hole inner sleeve 302b is matched with the cross-sectional dimension of the pressing punch, so that the pressing punch can extend into the through-hole inner sleeve 302 b. In the through-hole endotheca 302b can the installation be fixed in the through-hole, the lower limb of through-hole endotheca 302b stretches out downwards from the through-hole, and the height that stretches out is roughly equal to the thickness of sealing strip, thereby the lower limb of the through-hole endotheca 302b who stretches out and the upper surface butt of first mass flow body avoid annotating the material die and move to the upper surface of first mass flow body when interfering with the sealing strip that has been fixed in first mass flow body upper surface.
Fig. 7 is a schematic view of the first heat seal device of the electrode sheet production apparatus according to the present invention. The first heat seal device includes a first heat seal device housing 401, a first upper heat seal portion 402, a fourth upper drive device 403, a first lower heat seal portion 404, and a third lower drive device 405. The first heat seal device housing 401 may be, for example, a "C" type, with the fourth upper driving device 403 mounted on the upper horizontal housing and the third lower driving device 405 mounted on the lower horizontal housing. The first upper heat-seal lands 402 are attached to the fourth upper driving device 403 so that the first upper heat-seal lands 402 can move up and down, and the first lower heat-seal lands 404 are attached to the third lower driving device 405 so that the first lower heat-seal lands 404 can move up and down. In this embodiment, the first upper heat-seal lands 402 include two strip-shaped heating portions provided along the length direction of the electrode sheet, and the shape and position of the first lower heat-seal lands correspond to those of the first upper heat-seal lands. In the first heat-sealing process, first, the susceptor is transferred between the first upper heat-seal portion and the first lower heat-seal portion (i.e., a first heat-sealing station), the first upper heat-seal portion 402 is moved down to the upper surface of the sealing strip by the fourth upper driving device 403 such as a cylinder driving device, and at the same time, the first lower heat-seal portion 404 is moved up through the susceptor through-hole by the third lower driving device 405 such as a cylinder driving device and is abutted with the lower surface of the first current collector at a position corresponding to the sealing strip. The upper and lower surfaces of the seal strip in the length direction of the electrode sheet are melted by the heating of the first lower heat-seal lands 404 and the first upper heat-seal lands 402, thereby fixedly connecting the first current collector, the seal strip in the length direction of the electrode sheet, and the second current collector.
Fig. 8 is a schematic view of the second heat seal device of the electrode sheet production apparatus according to the present invention. The second heat seal device includes a second heat seal device housing 501, a second upper heat seal portion 502, a fifth upper driving device 503, a second lower heat seal portion 504, and a fourth lower driving device 505. The second heat sealing device housing 501 may be, for example, a "C" type, with the fifth upper driving device 503 mounted on the upper horizontal housing and the fourth lower driving device 505 mounted on the lower horizontal housing. The second upper heat seal sealing portion 502 is attached to the fifth upper driving device 503 such that the second upper heat seal sealing portion 502 can move up and down, and the second lower heat seal sealing portion 504 is attached to the fourth lower driving device 505 such that the second lower heat seal sealing portion 504 can move up and down. In this embodiment, the second upper heat-seal lands 502 include two strip-shaped heating portions provided in the width direction of the electrode sheet, and the shape and position of the second lower heat-seal lands correspond to those of the second upper heat-seal lands. In the second heat-sealing process, first, the susceptor is transferred between the second upper heat-seal portion and the second lower heat-seal portion (i.e., the second heat-seal station), the second upper heat-seal portion 502 is moved down to the upper surface of the sealing strip by the fifth upper driving device 503 such as a cylinder driving device, and at the same time, the second lower heat-seal portion 504 is moved up through the susceptor through-hole and abuts against the lower surface of the first current collector at a position corresponding to the sealing strip by the fourth lower driving device 505 such as a cylinder driving device. The upper and lower surfaces of the sealing strip in the width direction of the electrode sheet are melted by the heating of the second lower heat-seal lands 504 and the second upper heat-seal lands 502, so that the first current collector, the sealing strip in the width direction of the electrode sheet, and the second current collector are fixedly connected, thereby completing the preparation of the entire electrode sheet.
Fig. 9(a) -9(c) are schematic views of the heating part of the upper/lower heat sealing part of the heat sealing device of the electrode sheet production apparatus according to the present invention, in which fig. 9(a) -9(c) respectively show different embodiments. In the embodiments shown in fig. 1, 7 and 8, the heat sealing of the sealing tapes in the length direction of the electrode sheet and in the width direction of the electrode sheet is performed by two heat sealing devices, respectively. However, it is also possible to achieve heat-sealing of all the sealing tapes with only one heat-sealing device, and in this case, the cross-sectional shape of the heating section 406 of the upper/lower heat-sealing section of the heat-sealing device may be as shown in fig. 9(a) -9(c), for example, the cross-sectional shape of the heating section 406 may be a ring shape, a rectangular shape, or a plurality of bar shapes.
Fig. 10 is a block diagram of an electrode sheet processing method according to an embodiment of the present invention. In the processing method, the sealing strips are fixedly connected with the first current collector and the second current collector in a gluing mode. In the glue pressing procedure, the lower surface of the sealing strip is glued and fixedly connected to the upper surface of the first current collector; in the tabletting process, a material injection female die is arranged on the upper surface of a first current collector, an electrode material is injected into a through hole of the material injection female die through a material injection port, the electrode material in the through hole of the material injection female die is vibrated and leveled, a pressing male die is extended into the material injection female die to pre-press the electrode material at the pressure of 5MPa, and the pressing male die is pressed down at the preset pressure of 10MPa for two times to compact the electrode material into an electrode material layer with the thickness of 5 mm; in the glue sealing process, the upper surface of the sealing strip is coated with glue, and the second current collector is fixedly connected to the sealing strip, so that the preparation of the whole electrode plate is completed.
Fig. 11 is a block diagram of an electrode sheet processing method according to another embodiment of the present invention. In the processing method, the sealing strips are fixedly connected with the first current collector and the second current collector in a hot melting mode. In the glue pressing procedure, the sealing strip is placed on the upper surface of the first current collector, the lower surface of the sealing strip is heated and melted at 170 ℃, and the sealing strip is fixedly connected with the first current collector; in the tabletting process, a material injection female die is arranged on the upper surface of a first current collector, an electrode material is injected into a through hole of the material injection female die through a material injection port, the electrode material in the through hole of the material injection female die is scraped and leveled, and a lower pressing male die is extended into the material injection female die to compact the electrode material into an electrode material layer with the thickness of 4mm at a preset pressure of 15 MPa; in the heat sealing process, the second current collector is placed on the sealing strip, the upper surface of the sealing strip is heated and melted at 170 ℃, and the sealing strip is fixedly connected with the second current collector, so that the preparation of the whole electrode plate is completed.
The specific embodiments of the present invention are not intended to be limiting of the invention. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims (22)

1. The utility model provides an electrode slice production facility of lithium thick liquids battery, the electrode slice of lithium thick liquids battery include first mass flow body, the second mass flow body, be located first mass flow body with the second mass flow body between the electrode material layer and along the sealing strip that is used for sealing the electrode slice that first mass flow body and second mass flow body's edge all around set up, its characterized in that, electrode slice production facility is including the film clamp that is located the preforming station, the film clamp includes: the material injection female die is of a plate-shaped structure with a through hole, and the through hole of the material injection female die is used for limiting the outline of the electrode material layer; the first lower driving device is connected with the injection female die and is used for driving the injection female die to move up and down; the electrode material storage device comprises a material injection port and a material storage device, wherein the material storage device is used for storing an electrode material, the material injection port is connected to the material storage device through a pipeline, and the material injection port can inject the electrode material in the material storage device into a through hole of the material injection female die; the shape of the pressing male die is matched with that of the through hole of the injection female die, so that the pressing male die can extend into the through hole of the injection female die and compact the electrode material in the through hole of the injection female die; and the first upper driving device is connected with the lower pressing male die and used for driving the lower pressing male die to move up and down.
2. The electrode tab production apparatus for a lithium slurry battery according to claim 1, further comprising a susceptor, wherein the upper surface of the susceptor is capable of bearing the electrode tabs, and a susceptor through hole or a susceptor groove is provided on the susceptor, and allows a processing member to pass through the susceptor through hole or the susceptor groove from below so that the electrode tabs can be processed from below the susceptor.
3. The electrode tab production apparatus of a lithium slurry battery according to claim 2, wherein the carrier table is fixedly connected to a conveying device, the conveying device is a rotatable rotating table or the conveying device is a conveyable conveyor belt.
4. The electrode sheet production apparatus for a lithium slurry battery according to claim 1, wherein the injection female die includes a lower protrusion or a hollow through-hole inner sleeve, the lower protrusion is fixedly connected to or integrally formed with a lower surface of the injection female die along an outer contour of the through-hole, the through-hole inner sleeve is fixedly installed in the through-hole and extends downward from the through-hole, and a height of the lower protrusion and a height of the through-hole inner sleeve extending downward from the lower surface of the injection female die are greater than or equal to a thickness of the sealing strip.
5. The electrode tab production apparatus of a lithium paste battery according to claim 1, wherein a heating element is provided in the lower punch and/or the injection female die so that the electrode material is heated during the compaction of the electrode material.
6. The electrode sheet production apparatus of a lithium paste battery according to claim 2, wherein the electrode sheet production apparatus further comprises a caulking device located at a caulking station, the caulking device comprising: a vacuum chuck, the vacuum chuck being operable to grasp a sealing strip; the second upper driving device is connected with the vacuum chuck and used for driving the vacuum chuck to move up and down; a horizontal moving means to which the second upper driving means is connected such that the second upper driving means can move horizontally.
7. The electrode tab production apparatus of a lithium paste battery according to claim 6, wherein the caulking device further comprises: a glue pressing device heating portion provided with a vertical heating plate capable of passing through the bearing table through hole or the bearing table groove to heat the first current collector placed on the bearing table and the sealing strip placed on the first current collector, thereby melting the lower surface of the sealing strip so as to fixedly connect the sealing strip with the first current collector; and the second lower driving device is connected with the heating part of the glue pressing device and is used for driving the heating part of the glue pressing device to move up and down.
8. The electrode sheet production apparatus of a lithium paste battery according to claim 6 or 7, wherein the electrode sheet production apparatus further comprises a pressing device at a glue sealing station, the pressing device comprising: a pressing block capable of pressing the second current collector placed on the upper surface of the sealing strip and the sealing strip for adhesive connection; and the third upper driving device is connected with the pressing block and used for driving the pressing block to move up and down.
9. The electrode tab production apparatus of a lithium paste battery according to claim 2, wherein the electrode tab production apparatus further comprises a first heat seal device at a first heat seal station, the first heat seal device comprising: a first upper heat seal portion, which is heatable and movable to an upper surface of the second current collector to melt an upper surface of a sealing strip below the second current collector to fixedly connect the second current collector and the sealing strip, the first upper heat seal portion having a plate-shaped, ring-shaped, or strip-shaped structure; and the fourth upper driving device is connected with the first upper heat sealing part and is used for driving the first upper heat sealing part to move up and down.
10. The electrode tab production apparatus of a lithium paste battery according to claim 9, wherein the first heat sealing device further comprises: a first lower heat sealing part which can be heated and can move to the lower surface of the bearing table, wherein the first lower heat sealing part is used for transmitting heat to the first current collector by penetrating the first lower heat sealing part through the bearing table through hole or the bearing table groove or transmitting heat to the first current collector by a bearing table made of heat conducting materials, and the first lower heat sealing part is of a flat plate-shaped, annular or strip-shaped structure; and the third lower driving device is connected with the first lower heat-sealing part and is used for driving the first lower heat-sealing part to move up and down.
11. The electrode tab production apparatus of a lithium paste battery according to claim 10, wherein the first upper heat-seal land and the first lower heat-seal land are each two parallel strip-like structures arranged in the length direction of the electrode tab.
12. The electrode tab production apparatus of a lithium paste battery according to claim 11, wherein the electrode tab production apparatus further comprises a second heat seal device at a second heat seal station, the second heat seal device comprising: the second upper heat sealing part can be heated and can move to the upper surface of the second current collector so as to melt the upper surface of the sealing strip below the second current collector to fixedly connect the second current collector and the sealing strip, and the second upper heat sealing part is of two parallel strip-shaped structures arranged along the width direction of the electrode plate; the fifth upper driving device is connected with the second upper heat sealing part and used for driving the second upper heat sealing part to move up and down; the second lower heat-sealing part can be heated and can move to the lower surface of the bearing table, the second lower heat-sealing part is of two parallel strip-shaped structures arranged along the width direction of the electrode plate, and the second lower heat-sealing part can penetrate through the bearing table through hole or the bearing table groove so as to heat the first current collector; and the fourth lower driving device is connected with the second lower heat-sealing part and used for driving the second lower heat-sealing part to move up and down.
13. An electrode tab production line of a lithium slurry battery, comprising the battery tab production apparatus of the lithium slurry battery as claimed in any one of claims 1 to 12.
14. A processing method of the electrode tab production facility of the lithium paste battery as claimed in any one of claims 1 to 12, comprising a sheet-forming step of: placing a first current collector on a bearing table, moving a material injection female die to the upper surface of the first current collector, and injecting an electrode material in a material storage device into a through hole of the material injection female die through a material injection port; and moving the pressing male die into the through hole of the injection female die to compact the electrode material in the through hole of the injection female die.
15. The processing method according to claim 14, wherein the injection port horizontally moves above the through hole of the injection female die in the width direction of the through hole of the injection female die, and the average thickness of the electrode material injected into the injection female die is 5 to 50 mm.
16. The processing method according to claim 14, wherein the pressure of the lower punch ranges from 0.5 to 20 MPa.
17. The processing method according to claim 14, wherein the pressing speed of the pressing punch is 5 to 30 mm/s.
18. The processing method of the electrode sheet production apparatus according to claim 14, wherein the processing method includes the following adhesive pressing step: the pressing step is performed before or after the pressing step, wherein a lower surface of a sealing strip is coated with glue, the sealing strip is placed on an upper surface of the first current collector in a manner of surrounding the peripheral edge of the first current collector, and the sealing strip is fixedly connected with the first current collector.
19. The processing method of the electrode sheet production apparatus according to claim 18, wherein the processing method includes the following steps of: and performing the glue sealing step after the tabletting step, wherein glue is applied to the upper surface of the sealing strip, a second current collector is placed on the sealing strip, and the sealing strip is fixedly connected with the second current collector.
20. The processing method of the electrode sheet production apparatus according to claim 14, wherein the processing method includes the following adhesive pressing step: the pressing step may be performed before or after the pressing step, wherein a sealing strip is placed on an upper surface of the first current collector so as to surround a circumferential edge of the first current collector, and a lower surface of the sealing strip is melted by heating the first current collector and the sealing strip from below, thereby fixedly connecting the first current collector to the sealing strip.
21. The processing method of the electrode sheet production apparatus according to claim 20, wherein the processing method includes the heat-sealing step of: the heat-sealing step is performed after the sheeting step, in which a second current collector is placed on the sealing strip, and an upper surface of the sealing strip is melted by heating the second current collector and the sealing strip from above, thereby fixedly connecting the sealing strip with the second current collector.
22. The process according to claim 21, wherein the heating temperature in the step of pressing and the step of heat-sealing is 40 to 300 ℃.
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