WO2024000805A1 - 复合集流体与箔材连接装置及其连接方法 - Google Patents

复合集流体与箔材连接装置及其连接方法 Download PDF

Info

Publication number
WO2024000805A1
WO2024000805A1 PCT/CN2022/116806 CN2022116806W WO2024000805A1 WO 2024000805 A1 WO2024000805 A1 WO 2024000805A1 CN 2022116806 W CN2022116806 W CN 2022116806W WO 2024000805 A1 WO2024000805 A1 WO 2024000805A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
foil
current collector
composite current
component
Prior art date
Application number
PCT/CN2022/116806
Other languages
English (en)
French (fr)
Inventor
刘科
李正林
严伟
李学法
张国平
Original Assignee
扬州纳力新材料科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 扬州纳力新材料科技有限公司 filed Critical 扬州纳力新材料科技有限公司
Publication of WO2024000805A1 publication Critical patent/WO2024000805A1/zh

Links

Images

Classifications

    • 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
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to the field of battery technology, and in particular to a composite current collector and foil connection device and a connection method thereof.
  • Batteries are widely used in consumer electronics and electric vehicles due to their advantages of high energy density, long service life, green and pollution-free, and high safety performance. How to achieve high safety and high energy density of batteries has become a current research focus. With the continuous development of the battery industry, current collectors with better performance have emerged, that is, composite current collectors composed of polymers and metals.
  • the advantages of composite current collectors are as follows. First, safety is greatly improved. Second, effectively increase the energy density of batteries. Third, reduce the thickness of copper foil and reduce raw material costs.
  • the disadvantages of the composite current collector are as follows. Since the composite current collector includes an insulating layer formed of polymer materials, it is difficult to transport the current in the battery core to the electrode terminals.
  • the traditional technical solution is to use laser or ultrasonic wave (tooth welding, rolling welding) for transfer welding to weld the foil and composite current collector together.
  • laser or ultrasonic wave teeth welding, rolling welding
  • the metal foil and the metal layer on the side of the composite current collector are fused at high temperature. Welding is achieved after cooling, thereby improving the flow capacity of the composite current collector.
  • the use of laser or ultrasonic waves will cause excessive local heat at the welding position (laser is a high-energy light, and ultrasonic waves convert high-frequency vibration energy into heat energy through friction, so that the contact surface between the metal foil and the current collector melts into one).
  • the fluid center is a polymer material, which will deform when heated. When welding, the polymer material will expand and overflow.
  • the present invention provides a composite current collector and foil connection device.
  • the composite current collector and foil connecting device of the present invention can improve the overflow capacity of the current from the battery core to the electrode terminal, solve the problem that the polymer layer cannot overflow, reduce the resistance, improve the adhesive force, improve the mechanical strength of the material, and improve Battery safety.
  • One embodiment provides a composite current collector and foil connection device, including a foil unwinding roller, a composite current collector unwinding roller, a coating component, a folding component, a pressing component, and a collecting component.
  • the folding component, The pressing part and the receiving part are arranged in sequence.
  • the coating part includes a feed pipe, a return pipe, a feed box and a gravure roller. The feed pipe and the return pipe are both connected to the feed pipe.
  • the gravure roller is arranged at the outlet of the material box, the foil material on the foil unwinding roller passes through the coating component and the folding component in sequence, and the composite current collector unwinding roller
  • the composite current collector on the foil enters the folding part, which is used to fold the foil and the composite current collector in half and introduce them into the pressing part for drying and rolling.
  • the coating component further includes a first approach roller and a second approach roller.
  • the first approach roller and the second approach roller are disposed at the outlet of the magazine and are evenly spaced. Located below the gravure roller, the first approach roller and the second approach roller cooperate with the gravure roller to perform gravure coating.
  • the composite current collector and foil connecting device further includes a tension adjustment component, which includes a passing roller, a pendulum roller, a pendulum roller bracket, and a potential sensor.
  • the pendulum roller is movably connected to the The balance roller bracket, the potential sensor is installed on the balance roller bracket for detecting the angular position of the balance roller, the passing roller is spaced apart from the balance roller, and the foil unwinding roller is connected to the balance roller.
  • the tension adjustment component is provided between the coating components, and/or between the composite current collector unwinding roller and the folding component, and/or between the pressing component and the collecting component.
  • the folding component includes a folding guide rail, a pre-pressing roller and a pre-folding roller.
  • the pre-pressing roller and the pre-folding roller are both arranged at the feed end of the folding guide rail.
  • the folding guide rail There is a guide channel, the size of the guide channel gradually narrows along the forward direction of the material, the pre-pressing roller is used to pre-press the composite current collector, the angle setting range of the pre-folding roller is 20°-60°, the The pre-folding roller is used to pre-flange the horizontally advancing foil.
  • the pressing component further includes a first pressing roller and a second pressing roller, the first pressing roller and the second pressing roller are arranged oppositely, and the first pressing roller and the third pressing roller are arranged oppositely.
  • a pressing interval is formed between the two pressing rollers, and the pressing interval between the first pressing roller and the second pressing roller is adjustable.
  • the pressing component further includes an exhaust hood, and the exhaust hood is provided on the first pressure roller and the second pressure roller.
  • the rewinding component includes a rewinding roller and a pressure roller, the rewinding roller and the pressure roller are arranged oppositely, and a rewinding interval is formed between the rewinding roller and the pressure roller.
  • Another object of the present invention is to provide a method for connecting a composite current collector and a foil material.
  • a method for connecting composite current collectors and foils including the following steps:
  • the components of the adhesive liquid include solvent, dispersant, main material, thickener, adhesive and wetting agent.
  • the solid content of the adhesive liquid ranges from 40 to 80%, and the viscosity range is 50-400mpa.s;
  • Coating Apply the adhesive liquid to the surface of the foil
  • Fold the foil in half Fold the flat foil in half so that the two folded surfaces are in contact with the two surfaces of the composite current collector;
  • Rolling drying Rolling and drying the laminated foil and composite current collector
  • the solvent in the adhesive liquid is an aqueous solvent
  • the dispersant includes one or both of ammonium salt compounds and polyphosphates, and the mass percentage of the dispersant in the adhesive liquid is 0.1-1%;
  • the main material is one or more of silver powder, copper powder, gold powder and aluminum powder
  • the particle size range of the main material is: 0.1-10 ⁇ m
  • the particle size of the main material in the adhesive liquid is The mass percentage is 40-80%;
  • the viscosity range of the thickener is between 50-800 mpa.s, and the mass percentage of the thickener in the adhesive liquid is 5-15%;
  • the adhesive includes acrylic adhesive, styrene-butadiene latex, PVA, styrene acrylic acid, polyacrylamide, polyvinyl alcohol, polyvinylpyrrolidone, polyethylene oxide, modified paraffin resin, carbo resin, One or more of polyacrylic acid, polyurethane acrylate, polyacrylate copolymer emulsion, polyurethane and urethane, the mass percentage of the adhesive in the adhesive liquid is 5-20%;
  • the wetting agent includes one or more of silicone ether surfactants, anionic surfactants, and nonionic surfactants, and the wetting agent is present in the adhesive liquid.
  • the mass percentage is 0.1-1%.
  • the coating method when the adhesive liquid is applied to the surface of the foil, the coating method includes gravure coating, slot extrusion, spray coating, dip coating, electrospinning or comma coating.
  • the steps when the foil is folded in half, the steps include:
  • the foil and composite current collector are brought close to each other by a pre-pressure roller;
  • the running foil and the composite current collector are folded in half through the folding guide rail, so that the two folded surfaces of the foil are respectively attached to the two surfaces of the composite current collector.
  • the foil and the composite current collector are subjected to a roll drying process through a nip interval between the first press roller and the second press roller, and the first press roller and the second press roller are The temperature range of the pressure roller is 30°C-80°C.
  • Coating components provides a new connection method between metal foil and composite current collector, that is, bonding method, which improves the current flow capacity from the battery core to the electrode terminal and solves the problem that the polymer layer cannot flow.
  • the foil and the composite current collector are rolled and dried through the pressing interval between the first pressure roller and the second pressure roller.
  • the temperature range of the first and second pressure rollers is 30°C-80°C for heating roller drying.
  • the drying temperature can be set.
  • the pressure between the first and second pressure rollers can be adjusted as needed, and the drying effect is good.
  • a gravure roller is used to apply the adhesive liquid.
  • the surface of the gravure roller has cells engraved by a laser. The depth and width of the cells determine the amount of ink. The coating amount of the adhesive liquid can be accurately controlled. .
  • a highly conductive adhesive liquid such as an adhesive liquid prepared from conductive agents, carbon black, carbon nanotubes, conductive metals, etc.
  • the specific main materials are silver powder and copper.
  • Thickeners, adhesives, wetting agents, etc. are also added to the adhesive liquid.
  • the main material has strong conductivity and can improve the relationship between the foil and the composite current collector.
  • the over-current capacity, the adhesive provides bonding force between the metal foil and the current collector, and the use of thickener can prevent the precipitation of the main material, supplement the bonding effect, avoid high-temperature welding, and cause no mechanical damage to the material .
  • Figure 1 is a schematic diagram of a connection device between a composite current collector and a foil material according to an embodiment of the present invention.
  • connection device between composite current collector and foil 100. Foil unwinding roller; 200. Composite current collector unwinding roller; 300. Coating components; 301. Feed pipe; 301. Return pipe; 303. Material box ; 304, gravure roller; 305, first approach roller; 306, second approach roller; 400, folding component; 401, folding guide rail; 402, pre-pressing roller; 403, pre-folding roller; 500, pressing component; 501, The first pressure roller; 502, the second pressure roller; 503, exhaust cover; 600, rewinding component; 601, rewinding roller; 602, rewinding pressure roller; 700, tension adjustment component; 701, roller; 702. Pendulum roller; 703, pendulum roller bracket; 21, foil material; 22, composite current collector.
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as “first” and “second” may explicitly or implicitly include at least one of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.
  • connection In the present invention, unless otherwise clearly stated and limited, the terms “installation”, “connection”, “connection”, “fixing” and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated into one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise specified limitations. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
  • a first feature being “on” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. touch.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • the terms “below”, “below” and “beneath” the first feature of the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
  • the embodiment of the present application provides a composite current collector and foil connection device 10 to solve the problem of laser or ultrasonic transfer welding in traditional technology, which reduces the processing accuracy, affects the life of the ultrasonic welding teeth, reduces the mechanical strength of the material, and reduces The tensile strength of the composite current collector 22 brings safety risks to the battery.
  • FIG. 1 is a schematic structural diagram of the composite current collector and foil connecting device 10 provided in the embodiment of the present application.
  • the composite current collector and foil connection device 10 of the present application can be used for battery preparation in the fields of consumer electronics and electric vehicles.
  • a composite current collector and foil connecting device 10 includes a foil unwinding roller 100, a composite current collector unwinding roller 200, a coating component 300, a folding component 400, and a pressing material. component 500 and the receiving component 600.
  • the folding part 400, the pressing part 500 and the collecting part 600 are arranged in sequence.
  • the coating component 300 includes a feed tube 301 , a return tube 301 , a magazine 303 and a gravure roller 304 .
  • the feed pipe 301 and the return pipe 301 are both connected to the material box 303 .
  • the gravure roller 304 is disposed at the discharge port of the material box 303 , wherein the discharge port is disposed below the material box 303 .
  • the feed pipe 301 and the return pipe 301 are arranged on the top of the material box 303.
  • the foil 21 on the foil unwinding roller 100 passes through the coating part 300 and the folding part 400 in sequence.
  • the composite current collector 22 on the composite current collector unwinding roller 200 enters the folding part 400 .
  • the folding part 400 is used to fold the foil 21 and the composite current collector 22 in half and introduce them into the pressing part 500 for drying and rolling.
  • the pressing component 500 and the collecting component 60 are electrically connected to the PLC control system respectively.
  • the gravure roller 304 is an anilox roller.
  • the gravure roller 304 has a specification of 130 LPI and a groove depth of 90 ⁇ m. It is easy to understand that in other embodiments, the gravure roller 304 has a specification of 150 LPI and a groove depth of 100 ⁇ m. The specifications of the gravure roller 304 can be set as needed.
  • the coating component 300 further includes a first approach roller 305 and a second approach roller 306 .
  • the first approach roller 305 and the second approach roller 306 are disposed at the discharge port of the magazine 303 and both are located below the gravure roller 304 .
  • the first approach roller 305 and the second approach roller 306 cooperate with the gravure roller 304 to perform gravure coating.
  • the first approach roller 305 and the second approach roller 306 are arranged in the same horizontal direction, so that the foil 21 advances in the horizontal direction.
  • the composite current collector and foil connection device 10 further includes a tension adjustment component 700 .
  • the tension adjustment component 700 includes a roller 701, a swing roller 702, a swing roller bracket 703 and a potential sensor.
  • the pendulum roller 702 is movably connected to the pendulum roller bracket 703 .
  • the potential sensor is installed on the balance roller bracket 703 for detecting the angular position of the balance roller 702 .
  • the transfer roller 701 and the swing roller 702 are arranged at intervals.
  • Tension adjustment is provided between the foil unwinding roller 100 and the coating component 300, and/or between the composite current collector unwinding roller 200 and the folding component 400, and/or between the pressing component 500 and the collecting component 600. Part 700.
  • the potential sensor is electrically connected to the PLC control system.
  • tension adjustment components 700 are provided between the foil unwinding roller 100 and the coating component 300 , between the composite current collector unwinding roller 200 and the folding component 400 , and between the pressing component 500 and the collecting component 600 .
  • the potential sensor can convert the voltage signal into an angle signal to determine the position of the pendulum roller 702 .
  • the pendulum roller 702 should be in the middle position. If the pendulum roller 702 deviates from the middle position, the potential sensor will transmit the signal to the PLC control system for processing.
  • the PLC control system will work according to the signal to the servo motor, and the tension control will be stable and accurate.
  • the folding component 400 includes a folding guide rail 401 , a pre-pressing roller 402 and a pre-folding roller 403 .
  • the pre-pressing roller 402 and the pre-folding roller 403 are both arranged at the feed end of the folding guide rail 401.
  • the folding guide rail 401 has a guide channel. The size of the guide channel gradually narrows along the forward direction of the material.
  • the pre-pressing roller 402 is used to pre-press the composite current collector 22 .
  • the angle setting range of the pre-folding roller 403 is 20°-60°, and the pre-folding roller 403 is used to pre-flange the horizontally advancing foil 21 .
  • the pressing component 500 further includes a first pressing roller 501 and a second pressing roller 502 .
  • the first pressing roller 501 and the second pressing roller 502 are arranged oppositely, and a pressing gap is formed between the first pressing roller 501 and the second pressing roller 502 .
  • the pressing interval between the first pressing roller 501 and the second pressing roller 502 is adjustable.
  • the first pressure roller 501 and the second pressure roller 502 are both heated pressure rollers.
  • the temperature of the first pressure roller 501 and the second pressure roller 502 is 30°C-80°C. Heated roller drying. The drying temperature can be set.
  • the first pressure roller 501 The pressure between the second pressure roller 502 and the second pressure roller 502 can be adjusted as needed. Applying pressure to the first pressure roller 501 and the second pressure roller 502 can make the bonding stronger and smoother.
  • the first pressure roller 501 and the second pressure roller 502 are driven to rotate by a driving member, and the driving member can also exert pressure on the first pressure roller 501 and the second pressure roller 502 respectively.
  • the drive element is not shown in Figure 1 .
  • the driving part is electrically connected to the PLC control system.
  • the press component 500 further includes an exhaust hood 503 .
  • the exhaust cover 503 covers the first pressure roller 501 and the second pressure roller 502 .
  • the collecting component 600 includes a winding roller 601 and a collecting pressure roller 602 .
  • the rewinding roller 601 and the rewinding pressure roller 602 are arranged oppositely, and a rewinding interval is formed between the rewinding roller 601 and the rewinding pressure roller 602 .
  • the rewinding pressure roller 602 cooperates with the rewinding roller 601 to retract the finished product.
  • a rewinding pressure roller 602 is provided below the rewinding roller 601. The rewinding pressure roller 602 is used to discharge the air between the materials during rewinding, thereby reducing the air content and making the rewinding smoother.
  • the collecting component 600 further includes a collecting driving component.
  • the rewinding driving component is connected to the rewinding roller 601 for driving the rewinding roller 601 to rotate.
  • the material collecting driving component is electrically connected to the PLC control system.
  • Another object of the present invention is to provide a method for connecting a composite current collector and a foil material.
  • a method for connecting composite current collectors and foils including the following steps:
  • the components of the adhesive liquid include solvent, dispersant, main material, thickener, adhesive and wetting agent.
  • the solid content of the adhesive liquid ranges from 40-80%, and the viscosity ranges from 50-400mpa. s; Add the above components in order, stir at a certain speed for a certain time after each component is added, and finally form an adhesive liquid;
  • Coating apply the adhesive liquid to the surface of the foil 21;
  • Fold the foil 21 in half Fold the flat foil 21 in half so that the two folded surfaces are respectively attached to the two surfaces of the composite current collector 22;
  • Rolling drying Rolling and drying the laminated foil 21 and composite current collector 22;
  • the overall operating speed of the composite current collector 22 and the foil 21 ranges from 10 to 100 m/min.
  • the overall running speed of the composite current collector 22 and the foil 21, that is, the coating speed is 30 m/min.
  • the coating amount of the adhesive liquid ranges from 0.1 to 1.5 g/m 2 .
  • the coating amount is 1.0g/m 2 .
  • the solvent in the adhesive liquid is an aqueous solvent.
  • Adhesive fluids include water, alcohol, etc. Water-based solvents are pollution-free and environmentally friendly. The amount of solvent added to the bonding fluid is determined based on the target solid content. Higher solid content requires less solvent.
  • the dispersant includes one or two of ammonium salt compounds and polyphosphates; the dispersant is sodium pyrophosphate, sodium tripolyphosphate, sodium hexametaphosphate, alkyl aryl phosphate, alkyl aryl phosphate, etc.
  • the dispersant is in the adhesive liquid
  • the mass percentage in the solvent is 0.1-1%; the dispersant reduces the surface energy of the solvent, reduces the agglomeration of the main material, and makes the main material evenly dispersed in the solvent.
  • the main material is one or more of silver powder, copper powder, gold powder and aluminum powder: the order of conductivity of metals is silver>copper>gold>aluminum, so the main material is preferably silver powder, which can increase The conductivity of the interface between the foil 21 and the current collector, the particle size range of the main material such as silver powder: 0.1-10 ⁇ m, and the mass percentage of the main material in the bonding liquid is 40-80%.
  • the viscosity range of the thickener is between 50-800 mpa.s, and the mass percentage of the thickener in the adhesive liquid is 5-15%: the thickener has three functions, the first one can Adjust the viscosity of the silver paste. If the viscosity is too small during the coating process, the adhesive liquid will fall off, which is not conducive to the retention of the adhesive liquid on the foil 21; secondly, it can prevent precipitation.
  • the thickener is generally a network three-dimensional structure. It will fix the main material and play a dust-proof role. Commonly used ones are sodium carboxymethylcellulose, etc.; the third one plays the role of auxiliary bonding, and is used at the same time with the adhesive below to improve the adhesion.
  • the adhesive includes acrylic adhesive, styrene-butadiene latex, PVA, styrene acrylic acid, polyacrylamide, polyvinyl alcohol, polyvinylpyrrolidone, polyethylene oxide, modified paraffin resin, and carbo resin. , one or more of polyacrylic acid, polyurethane acrylate, polyacrylate copolymer emulsion, polyurethane and urethane, the mass percentage of the adhesive in the adhesive liquid is 5-20%, the role of the adhesive That is, the foil 21 is bonded to the surface of the current collector.
  • the wetting agent includes one or more of silicone ether surfactants, anionic surfactants, and nonionic surfactants.
  • the quality of the wetting agent in the adhesive liquid The percentage is 0.1-1%.
  • Anionic surfactants are sodium alkyl aryl sulfonate, sodium butyl naphthalene sulfonate, sodium isethionate or sodium dodecyl sulfonate; nonionic surfactants are long-chain fatty alcohol polyoxyethylene Ether, alkylphenol polyoxyethylene ether, polyoxyethylene alkyl alcoholamide or fatty alcohol polyoxyethylene ether.
  • the main purpose of the wetting agent is to reduce the surface tension of the silver paste and increase the leveling property, so that the silver paste can be more easily coated on the surface of the foil 21 .
  • the preparation of the adhesive liquid includes the following steps:
  • the components of the adhesive fluid include solvents, dispersants, main materials, thickeners, adhesives, wetting agents, etc.
  • S11 solvent select water and add 26.2Kg water to the double planetary stirring tank.
  • S12 dispersant Weigh 0.3Kg of ammonium salt dispersant and add it to the double planetary mixer. The stirring speed is 500rpm and the time is 10 minutes.
  • S13 main material select silver powder as the main material, select 1 ⁇ m as the silver powder particle size D50, weigh 55Kg of silver powder and add it to the double planetary mixer, stirring speed 1000rpm, time 60min.
  • S14 thickener select sodium carboxymethylcellulose, weigh 8Kg CMC and add it to the double planetary mixer, stirring speed 500rpm, time 30min.
  • S15 adhesive Choose acrylic adhesive, weigh 10Kg of adhesive and add it to the double planetary mixer, stirring speed 500rpm, time 30min.
  • S16 wetting agent Choose a silicone ether surfactant, weigh 0.5Kg and add it to the double planetary mixer. The stirring speed is 300rpm and the time is 20min.
  • the coating method when the adhesive liquid is applied to the surface of the foil 21 , the coating method includes gravure coating, slot extrusion, spray coating, dip coating, electrospinning or comma coating.
  • gravure coating and narrow slot extrusion are used for coating.
  • the specific steps include: the foil 21 is first unloaded from the unwinding reel, and gradually moves under the coating head. The coating head will press down against the upper foil 21, thereby moving the gravure roller 304 The silver paste above is transferred to the surface of the foil 21.
  • a first approach roller 305 and a second approach roller 306 are installed below the foil 21.
  • the first approach roller 305 and the second approach roller 306 have two functions.
  • the first one is the upper one.
  • the foil 21 provides support so that the foil surface is flat when being coated; secondly, the first approach roller 305 and the second approach roller 306 can be adjusted up and down to adjust the wrapping angle between the foil 21 and the gravure roller 304 to solve some coating problems. Defects in the coating process, such as streaks, missed coating, etc.
  • the steps include:
  • the horizontally advancing foil 21 is pre-flanged through the pre-folding roller 403; a pre-folding roller 403 with a certain angle is provided behind the coating part 300 and in front of the folding part 400.
  • the function of the pre-folding roller 403 is to fold
  • the horizontally advancing foil 21 is pre-flanged, and the angle of the pre-folding roller 403 is set in a range of 20-60 degrees.
  • the foil 21 and the composite current collector 22 are brought close to each other through the pre-pressing roller 402; specifically, a pre-pressing roller 402 is installed before entering the folding part 400 to bring the foil 21 and the composite current collector 22 close together, and a deflection guide can also be installed. Alignment is performed to prepare for entering the folding component 400 .
  • the running foil 21 and the composite current collector 22 are folded in half by the folding guide 401, so that the two folded surfaces of the foil 21 are respectively attached to the two surfaces of the composite current collector 22.
  • the opening of the folding guide 401 gradually becomes wider and narrower, and the running foil 21 and the composite current collector 22 are gradually folded in half.
  • the foil 21 and the composite current collector 22 are basically folded together.
  • the foil 21 and the composite current collector 22 undergo a roll drying process through a nip interval between the first pressure roller 501 and the second pressure roller 502 .
  • the first pressure roller 501 and the second pressure roller 502 The temperature range is 30°C-80°C.
  • the temperature range is 30°C-80°C.
  • the moisture and other solvents in the silver paste will be volatilized by heat.
  • the solvent will be volatilized by heat and can be collected through the exhaust hood 503.
  • the volatilized water vapor can be discharged in time to prevent excessive humidity.
  • Condensation and adhesive solidification bonding; the pressing interval between the first pressure roller 501 and the second pressure roller 502 is adjustable, and a certain pressure is applied to the material while drying, making the bonding stronger and smoother.
  • the above-mentioned composite current collector and foil connection device 10 has the following beneficial effects compared with traditional technology:
  • the coating component 300 provides a new connection method between the metal foil 21 and the composite current collector 22, that is, an adhesive method, which improves the overflow capability of the current from the battery core to the electrode terminal and solves the problem of the inability of the polymer layer to overflow. The problem.
  • the foil 21 is pre-folded.
  • the angle setting range of the pre-folding roller 403 is set to 20°-60°, and the horizontally advancing foil 21 is The pre-flanging is carried out to achieve pre-bending, and then the folding part 400 is sent.
  • the size of the folding guide rail 401 gradually increases from wide to narrow, so that both sides of the foil 21 gradually come close to the composite current collector 22, and the bonding effect is good.
  • the foil 21 and the composite current collector 22 coated with the adhesive liquid are bonded together through the folding member 400, the foil 21 and the composite current collector 22 pass between the first pressure roller 501 and the second pressure roller 502.
  • Rolling drying is performed at intervals between pressings.
  • the temperature range of the first pressing roller 501 and the second pressing roller 502 is 30°C-80°C.
  • the heating roller is dried.
  • the drying temperature can be set. Between the first pressing roller 501 and the second pressing roller 502 The pressure can be adjusted as needed, and the drying effect is good.
  • the gravure roller 304 is used to apply the adhesive liquid.
  • the surface of the gravure roller 304 has laser-engraved cells. The depth and width of the cells determine the amount of ink.
  • the coating amount of the adhesive liquid can be Precise control.
  • a highly conductive adhesive liquid such as an adhesive liquid prepared from conductive agents, carbon black, carbon nanotubes, conductive metals, etc.
  • the specific main materials are silver powder and copper.
  • Thickeners, adhesives, wetting agents, etc. are also added to the adhesive liquid.
  • the main material has strong conductivity and can improve the relationship between the foil 21 and the composite current collector 22.
  • the adhesive provides adhesive force between the metal foil 21 and the current collector.
  • the use of thickener can prevent the precipitation of the main material, supplement the bonding effect, avoid high-temperature welding, and damage the material. No mechanical damage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本发明公开了一种复合集流体与箔材连接装置及其连接方法。连接装置包括箔材放卷辊、复合集流体放卷辊、涂覆部件、对折部件、压料部件以及收料部件，对折部件、压料部件以及收料部件依次顺序设置，涂覆部件包括进料管、回料管、料盒以及凹版辊，进料管与回料管均连接于料盒，凹版辊设置于料盒的出料口处，箔材放卷辊上的箔材依次经过涂覆部件以及对折部件，复合集流体放卷辊上的复合集流体进入对折部件，对折部件用于对箔材与复合集流体对折并导入压料部件进行干燥辊压。上述的复合集流体与箔材连接装置能够提高电流从电芯到电极端子的过流能力，解决高分子层无法过流的问题，降低电阻，提高粘接力，提高材料的机械强度，提高电池使用安全性。

Description

复合集流体与箔材连接装置及其连接方法 技术领域
本发明涉及电池技术领域，特别是涉及一种复合集流体与箔材连接装置及其连接方法。
背景技术
电池由于能量密度高、使用寿命长、绿色无污染、安全性能高等优势被广泛应用于消费类电子产品和电动汽车领域。如何实现电池的高安全性、高能量密度已经成为目前的研究重点。随着电池行业的不断发展，出现了具有更佳性能的集流体，即高分子与金属复合而成的复合集流体。复合集流体优点如下，第一、大幅度提升了安全性。第二、有效提升电池的能量密度。第三、减少铜箔厚度，降低原材料成本。复合集流体的缺点如下，由于复合集流体包括由高分子材料形成的绝缘层，导致电芯中的电流输送到电极端子比较困难。
传统的技术方案是利用激光或超声波(焊齿焊接、滚动焊接)进行转接焊，将箔材和复合集流体焊接在一起，焊接过程中金属箔材与复合集流体侧面的金属层高温熔合，冷却后实现焊接，进而提高复合集流体的过流能力。使用激光或超声波会在焊接位置局部热量过高(激光为高能光线，超声波是将高频震动能量通过摩擦的方式转换能热能，使金属箔材与集流体的接触面熔化为一体)，复合集流体中心为高分子材料，受热会发生变形，焊接时会形造成高分子材料膨胀外溢。高分子材料受热膨胀外溢时，会造成粘连情况，导致焊齿本身、与材料之间粘连，降低加工精度，影响超声波焊齿的寿命，降低材料的机械强度，无论焊齿或滚动焊接，在焊接过程会穿透高分子层，降低了复合集流体的拉伸 强度，耐折弯能力变差，给电池带来安全风险。
发明内容
基于此，针对传统技术中激光或超声波进行转接焊，存在的降低加工精度，影响超声波焊齿的寿命，降低材料的机械强度，降低复合集流体的拉伸强度，给电池带来安全风险的问题，本发明提供了一种复合集流体与箔材连接装置。本发明的复合集流体与箔材连接装置能够提高电流从电芯到电极端子的过流能力，解决高分子层无法过流的问题，降低电阻，提高粘接力，提高材料的机械强度，提高电池使用安全性。
一实施例提供了一种复合集流体与箔材连接装置，包括箔材放卷辊、复合集流体放卷辊、涂覆部件、对折部件、压料部件以及收料部件，所述对折部件、所述压料部件以及收料部件依次顺序设置，所述涂覆部件包括进料管、回料管、料盒以及凹版辊，所述进料管与所述回料管均连接于所述料盒，所述凹版辊设置于所述料盒的出料口处，所述箔材放卷辊上的箔材依次经过所述涂覆部件以及所述对折部件，所述复合集流体放卷辊上的复合集流体进入所述对折部件，所述对折部件用于对箔材与复合集流体对折并导入所述压料部件进行干燥辊压。
在其中一些实施例中，所述涂覆部件还包括第一接近辊与第二接近辊，所述第一接近辊与所述第二接近辊设置于所述料盒的出料口处且均位于所述凹版辊的下方，所述第一接近辊、所述第二接近辊与所述凹版辊配合进行凹版涂布。
在其中一些实施例中，所述复合集流体与箔材连接装置还包括张力调节部件，所述张力调节部件包括过辊、摆辊、摆辊支架以及电位传感器，所述摆辊活动连接于所述摆辊支架，所述电位传感器安装于所述摆辊支架以用于检测所 述摆辊的角位，所述过辊与所述摆辊间隔设置，所述箔材放卷辊与所述涂覆部件之间、和/或所述复合集流体放卷辊与所述对折部件之间、和/或所述压料部件与所述收料部件之间设置有所述张力调节部件。
在其中一些实施例中，所述对折部件包括对折导轨、预压辊以及预折辊，所述预压辊、所述预折辊均设置于所述对折导轨的进料端，所述对折导轨具有导向通道，所述导向通道的尺寸沿着物料前进方向逐渐收窄，所述预压辊用于预压复合集流体，所述预折辊的角度设置范围为20°-60°，所述预折辊用于将水平前进的箔材进行预翻边。
在其中一些实施例中，所述压料部件还包括第一压辊以及第二压辊，所述第一压辊与所述第二压辊相对设置且所述第一压辊与所述第二压辊之间形成压料间隔，所述第一压辊与所述第二压辊之间的压料间隔可调。
在其中一些实施例中，所述压料部件还包括排气罩，所述排气罩罩设于所述第一压辊与所述第二压辊。
在其中一些实施例中，所述收料部件包括收卷辊与压辊，所述收卷辊与所述压辊相对设置且收卷辊与所述压辊之间形成收料间隔。
本发明另一目的还在于提供一种复合集流体与箔材连接方法。
一种复合集流体与箔材连接方法，包括如下步骤：
制备粘接液：所述粘接液的组分包括溶剂、分散剂、主材料、增稠剂、粘接剂以及润湿剂，所述粘接液固含量范围40-80％，粘度范围为50-400mpa.s；
涂覆：将粘接液涂覆至箔材表面；
箔材对折：将平整的箔材对折，使其对折的两个面分别与复合集流体的两个面贴合；
辊压干燥：对贴合后的箔材与复合集流体进行辊压干燥处理；以及
收卷。
在其中一些实施例中，所述粘接液中的溶剂为水性溶剂；
和/或，所述分散剂包括铵盐类化合物以及聚磷酸盐中的一种或者两种，所述分散剂在粘接液中的质量百分比为0.1-1％；
和/或，所述主材料为银粉、铜粉、金粉以及铝粉中的一种或几种，所述主材料的粒径范围：0.1-10μm，所述主材料的在粘接液中的质量百分比为40-80％；
和/或，所述增稠剂的粘度范围50-800mpa.s之间，所述增稠剂的在粘接液中的质量百分比为5-15％；
和/或，所述粘接剂包括丙烯酸型粘接剂、丁苯胶乳、PVA、苯丙烯酸、聚丙烯酰胺、聚乙烯醇、聚乙烯吡咯烷酮、聚氧化乙烯、改性石蜡树脂、卡波树脂、聚丙烯酸类、聚氨酯丙烯酸酯、聚丙烯酸酯共聚乳液、聚氨酯以及氨基甲酸酯中的一种或几种，所述粘接剂在粘接液中的质量百分比为5-20％；
和/或，所述润湿剂包含有机硅醚类的表面活性剂、阴离子型表面活性剂以及非离子型表面活性剂中的一种或几种，所述润湿剂在粘接液中的质量百分比为0.1-1％。
在其中一些实施例中，将粘接液涂覆至箔材表面时，涂覆方式包括凹版涂布、窄缝挤压、喷涂、浸涂、静电纺丝或者逗号涂布。
在其中一些实施例中，箔材对折时，具有包括如下步骤：
通过预折辊将水平前进的箔材进行预翻边；
通过预压辊使箔材和复合集流体靠近；
通过对折导轨使运行的箔材与复合集流体对折，使箔材对折的两个面分别与复合集流体的两个面贴合。
在其中一些实施例中，箔材与复合集流体经过所述第一压辊与所述第二压 辊之间的压料间隔进行辊压干燥处理，所述第一压辊与所述第二压辊的温度范围30℃-80℃。
上述复合集流体与箔材连接装置，相比传统技术具有如下有益效果：
(1)通过涂覆部件提供一种全新的金属箔材与复合集流体的连接方式即粘接方式，提高电流从电芯到电极端子的过流能力，解决高分子层无法过流的问题。
(2)通过对折导轨使运行的箔材与复合集流体对折，使箔材对折的两个面分别与复合集流体的两个面贴合，对复合集流体两面分别同时粘接箔材，提高金属箔材与集流体的接触面积，降低电阻，提高粘接力，是单面粘接的力的至少2倍。
(3)在箔材与复合集流体两面粘接前对箔材进行预折弯，通过设置预折辊的角度设置范围为20°-60°，将水平前进的箔材进行预翻边实现预折弯，接着送入对折部件，对折导轨的尺寸逐步由宽及窄使得箔材两面逐渐贴近复合集流体，贴合效果好。
(4)当被涂覆粘接液的箔材与复合集流体通过对折部件贴合后，箔材与复合集流体经过第一压辊与第二压辊之间的压料间隔进行辊压干燥处理，第一压辊与第二压辊的温度范围30℃-80℃加热辊干燥，干燥温度可以设置，第一压辊与第二压辊之间的压力可以根据需要调节，干燥效果佳。
(5)本发明中，采用凹版辊涂覆粘接液，凹版辊表面具有激光雕刻的网穴，网穴的深度和宽度决定了载墨量的多少，粘接液的涂覆量可以精准控制。
(6)复合集流体与箔材连接方法中，采用导电性强的粘接液，例如导电剂、炭黑、碳纳米管、导电金属等配制的粘接液，具体的主材料使用银粉、铜粉、金粉以及铝粉中的一种或几种，粘接液内还添加有增稠剂、粘接剂、润湿剂等， 主材料导电性强，可以提高箔材与复合集流体之间的过流能力，粘接剂在金属箔材与集流体之间提供粘接力，同时增稠剂的使用可以防止主材料的沉淀，补充粘接的作用，避免高温焊接，对材料无机械损伤。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单的介绍。显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对本领域技术人员来说，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
为了更完整地理解本申请及其有益效果，下面将结合附图来进行说明。其中，在下面的描述中相同的附图标号表示相同部分。
图1为本发明一实施例所述的复合集流体与箔材连接装置示意图。
附图标记说明
10、复合集流体与箔材连接装置；100、箔材放卷辊；200、复合集流体放卷辊；300、涂覆部件；301、进料管；301、回料管；303、料盒；304、凹版辊；305、第一接近辊；306、第二接近辊；400、对折部件；401、对折导轨；402、预压辊；403、预折辊；500、压料部件；501、第一压辊；502、第二压辊；503、排气罩；600、收料部件；601、收卷辊；602、收料压辊；700、张力调节部件；701、过辊；702、摆辊；703、摆辊支架；21、箔材；22、复合集流体。
具体实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以 便于充分理解本发明。但是本发明能够以很多不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本发明内涵的情况下做类似改进，因此本发明不受下面公开的具体实施例的限制。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二 特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
需要说明的是，当元件被称为“固定于”或“设置于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
在本发明的描述中，若干的含义是一个以上，多个的含义是两个以上，大于、小于、超过等理解为不包括本数，以上、以下、以内等理解为包括本数。如果有描述到第一、第二只是用于区分技术特征为目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量或者隐含指明所指示的技术特征的先后关系。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
本申请实施例提供一种复合集流体与箔材连接装置10，以解决传统技术中激光或超声波进行转接焊，存在的降低加工精度，影响超声波焊齿的寿命，降低材料的机械强度，降低复合集流体22的拉伸强度，给电池带来安全风险的问题。以下将结合附图对进行说明。
本申请实施例提供的复合集流体与箔材连接装置10，示例性的，请参阅图1所示，图1为本申请实施例提供的复合集流体与箔材连接装置10的结构示意图。本申请的复合集流体与箔材连接装置10能够用于消费类电子产品和电动汽 车等领域电池制备用途。
为了更清楚的说明复合集流体与箔材连接装置10的结构，以下将结合附图对复合集流体与箔材连接装置10进行介绍。
示例性的，请参阅图1所示，一种复合集流体与箔材连接装置10，包括箔材放卷辊100、复合集流体放卷辊200、涂覆部件300、对折部件400、压料部件500以及收料部件600。
对折部件400、压料部件500以及收料部件600依次顺序设置。
涂覆部件300包括进料管301、回料管301、料盒303以及凹版辊304。进料管301与回料管301均连接于料盒303。凹版辊304设置于料盒303的出料口处，其中，出料口设置于料盒303的下方。进料管301、回料管301设置于料盒303的顶部。箔材放卷辊100上的箔材21依次经过涂覆部件300以及对折部件400。
复合集流体放卷辊200上的复合集流体22进入对折部件400。
对折部件400用于对箔材21与复合集流体22对折并导入压料部件500进行干燥辊压。
压料部件500以及收料部件60分别与PLC控制系统电性连接。
在其中一些实施例中，凹版辊304为网纹辊，在其中一个具体实施例中，规格130LPI，90μm的槽深。不难理解，在其他实施例中，凹版辊304的规格150LPI，100μm的槽深。凹版辊304的规格可以根据需要进行设置。
在其中一些实施例中，涂覆部件300还包括第一接近辊305与第二接近辊306。第一接近辊305与第二接近辊306设置于料盒303的出料口处且均位于凹版辊304的下方。第一接近辊305、第二接近辊306与凹版辊304配合进行凹版涂布。第一接近辊305与第二接近辊306在同一水平方向上设置，使得箔材21 呈水平方向前进。
在其中一些实施例中，复合集流体与箔材连接装置10还包括张力调节部件700。张力调节部件700包括过辊701、摆辊702、摆辊支架703以及电位传感器。摆辊702活动连接于摆辊支架703。电位传感器安装于摆辊支架703以用于检测摆辊702的角位。过辊701与摆辊702间隔设置。箔材放卷辊100与涂覆部件300之间、和/或复合集流体放卷辊200与对折部件400之间、和/或压料部件500与收料部件600之间均设置有张力调节部件700。电位传感器与PLC控制系统电性连接。
优选地，箔材放卷辊100与涂覆部件300之间、复合集流体放卷辊200与对折部件400之间、压料部件500与收料部件600之间均设置有张力调节部件700。电位传感器可以将电压信号转变为角度信号，从而确定摆辊702的位置。正常工作过程中摆辊702应该处于中间位置，若摆辊702偏离中间位置，电位传感器会将信号传输给PLC控制系统进行处理，PLC控制系统根据信号给伺服电机信号进行工作，张力控制稳定精确。
在其中一些实施例中，对折部件400包括对折导轨401、预压辊402以及预折辊403。预压辊402、预折辊403均设置于对折导轨401的进料端。对折导轨401具有导向通道。导向通道的尺寸沿着物料前进方向逐渐收窄。预压辊402用于预压复合集流体22。预折辊403的角度设置范围为20°-60°，预折辊403用于将水平前进的箔材21进行预翻边。
在其中一些实施例中，压料部件500还包括第一压辊501以及第二压辊502。第一压辊501与第二压辊502相对设置且第一压辊501与第二压辊502之间形成压料间隔。第一压辊501与第二压辊502之间的压料间隔可调。第一压辊501以及第二压辊502均为热压辊，第一压辊501以及第二压辊502的温度为 30℃-80℃加热辊干燥，干燥温度可以设置，第一压辊501与第二压辊502之间的压力可以根据需要调节。对第一压辊501与第二压辊502施加压力能够使得粘接更结实，更平整。
在其中一些实施例中，第一压辊501以及第二压辊502分别通过驱动件驱动转动，驱动件也能够对第一压辊501以及第二压辊502分别施加压力。驱动件在附图1中未示出。驱动件与PLC控制系统电性连接。
在其中一些实施例中，压料部件500还包括排气罩503。排气罩503罩设于第一压辊501与第二压辊502。
在其中一些实施例中，收料部件600包括收卷辊601与收料压辊602。收卷辊601与收料压辊602相对设置且收卷辊601与收料压辊602之间形成收料间隔。通过驱动收卷辊601转动，收料压辊602配合收卷辊601实现对成品的收料。收卷辊601下方设置收料压辊602，收料压辊602用来排出材料间收卷时空气，减少空气含量，收卷更平整。
在其中一些实施例中，收料部件600还包括收料驱动部件。收料驱动部件连接于收卷辊601以用于驱动收卷辊601转动。收料驱动部件与PLC控制系统电性连接。
本发明另一目的还在于提供一种复合集流体与箔材连接方法。
一种复合集流体与箔材连接方法，包括如下步骤：
制备粘接液：粘接液的组分包括溶剂、分散剂、主材料、增稠剂、粘接剂以及润湿剂，粘接液固含量范围40-80％，粘度范围为50-400mpa.s；将以上组分按顺序加入，每加入一种组分后以一定的转速搅拌一定时间，最终形成粘接液；
涂覆：将粘接液涂覆至箔材21表面；
箔材21对折：将平整的箔材21对折，使其对折的两个面分别与复合集流 体22的两个面贴合；
辊压干燥：对贴合后的箔材21与复合集流体22进行辊压干燥处理；以及
收卷。
在其中一些实施例中，复合集流体22与箔材21整体运行速度范围：10-100m/min。例如，在其中一个具体实施例中，复合集流体22与箔材21整体运行速度也即涂布速度为30m/min。
在其中一些实施例中，粘接液的涂覆量范围0.1-1.5g/m 2。例如，在其中一个具体实施例中，涂覆量为1.0g/m 2。
在其中一些实施例中，粘接液中的溶剂为水性溶剂。粘接液包括水、酒精等，水性溶剂无污染，对环境友好。粘接液中溶剂的加入量根据目标固含量确定，固含量高则所需要的溶剂量少。
在其中一些实施例中，分散剂包括铵盐类化合物以及聚磷酸盐中的一种或者两种；分散剂选择焦磷酸钠、三聚磷酸钠、六偏磷酸钠烷基芳基磷酸盐、烷基苯磺酸盐、二烷基磺基琥珀酸盐、聚羧酸盐，聚(甲基)丙烯酸衍生物以及顺丁烯二酸酐共聚物中的一种或几种，分散剂在粘接液中的质量百分比为0.1-1％；分散剂作用降低溶剂的表面能，减少主材料的团聚，使主材料均匀分散在溶剂当中。
在其中一些实施例中，主材料为银粉、铜粉、金粉以及铝粉中的一种或几种：金属的导电性排序，银>铜>金>铝，所以主材料优选银粉，银粉能够增加箔材21与集流体界面连接处的导电性，主材料如银粉的粒径范围：0.1-10μm，主材料的在粘接液中的质量百分比为40-80％。
在其中一些实施例中，增稠剂的粘度范围50-800mpa.s之间，增稠剂的在粘接液中的质量百分比为5-15％：增稠剂的三个作用，第一可以调制银浆的粘度， 在涂覆过程中粘度太小，粘接液会掉落，不利于粘接液在箔材21的保留；第二可以防止沉淀，增稠剂一般为网状立体结构，会固定主材料，起到防尘的作用，常用的如羧甲基纤维素钠等；第三起到辅助粘接的作用，与下面的粘接剂同时使用，提高粘接性。
在其中一些实施例中，粘接剂包括丙烯酸型粘接剂、丁苯胶乳、PVA、苯丙烯酸、聚丙烯酰胺、聚乙烯醇、聚乙烯吡咯烷酮、聚氧化乙烯、改性石蜡树脂、卡波树脂、聚丙烯酸类、聚氨酯丙烯酸酯、聚丙烯酸酯共聚乳液、聚氨酯以及氨基甲酸酯中的一种或几种，粘接剂在粘接液中的质量百分比为5-20％，粘接剂作用就是粘接箔材21与集流体表面。
在其中一些实施例中，润湿剂包含有机硅醚类的表面活性剂、阴离子型表面活性剂以及非离子型表面活性剂中的一种或几种，润湿剂在粘接液中的质量百分比为0.1-1％。阴离子型表面活性剂为烷基芳基磺酸钠、丁基萘磺酸钠、羟乙基磺酸钠或十二烷基磺酸钠；非离子型表面活性剂为长链脂肪醇聚氧乙烯醚、烷基酚聚氧乙烯醚、聚氧乙烯烷基醇酰胺或脂肪醇聚氧乙烯醚。润湿剂主要目的降低银浆的表面张力，增加流平性，是银浆更容易涂覆在箔材21表面。
例如，在一个具体示例中，粘接液的制备包括如下步骤：
粘接液的组分包括溶剂、分散剂、主材料、增稠剂、粘接剂、润湿剂等。
S11溶剂：选择水，在双行星搅拌罐中加入26.2Kg水。
S12分散剂：称取0.3Kg铵盐类分散剂加入到双行星搅拌机，搅拌转速500rpm，时间10min。
S13主材料：选择银粉作为主材料，银粉粒径D50选择1μm，称取55Kg银粉加入到双行星搅拌机，搅拌转速1000rpm，时间60min。
S14增稠剂：选择羧甲基纤维素钠，称取8Kg CMC加入到双行星搅拌机， 搅拌转速500rpm，时间30min。
S15粘接剂：选择丙烯酸型粘接剂，称取10Kg粘接剂加入到双行星搅拌机，搅拌转速500rpm，时间30min。
S16润湿剂：选择有机硅醚类的表面活性剂，称取0.5Kg加入到双行星搅拌机，搅拌转速300rpm，时间20min。
S17将以上组分按顺序加入，最终形成粘接液，粘接液固含量55％，粘度230mpa.s。
在其中一些实施例中，将粘接液涂覆至箔材21表面时，涂覆方式包括凹版涂布、窄缝挤压、喷涂、浸涂、静电纺丝或者逗号涂布。优选地，根据浆料特性，在其中一个实施例中，涂覆采用凹版涂布、窄缝挤压。如图1所示，使用凹版涂布时，具体包括：箔材21首先从放卷轴放出，逐渐走带至涂布头下方，涂布头会下压靠上箔材21，从而将凹版辊304上面的银浆转移到箔材21表面，箔材21下方安装有第一接近辊305、第二接近辊306，第一接近辊305、第二接近辊306两个作用，第一，为上方的箔材21提供支撑，使其被涂覆时箔面平整；第二，第一接近辊305、第二接近辊306可以上下调节，进而调节箔材21与凹版辊304的包角，解决一些涂覆过程的缺陷，例如条纹、漏涂等。
在其中一些实施例中，箔材21对折时，具有包括如下步骤：
通过预折辊403将水平前进的箔材21进行预翻边；在涂覆部件300的后方且在对折部件400的前方设置一根具有一定角度的预折辊403，预折辊403作用就是将水平前进的箔材21进行预翻边，预折辊403的角度设置范围20-60度之间。
通过预压辊402使箔材21和复合集流体22靠近；具体地，在快进入对折部件400前安装一个预压辊402，使箔材21和复合集流体22靠近，进一步还可 以安装纠偏器进行对准，为进入对折部件400准备。
通过对折导轨401使运行的箔材21与复合集流体22对折，使箔材21对折的两个面分别与复合集流体22的两个面贴合。对折导轨401的开口由宽及窄，逐步会使运行的箔材21与复合集流体22对折，当从对折导轨401出料时，箔材21与复合集流体22基本贴合对折在一起。
在其中一些实施例中，箔材21与复合集流体22经过第一压辊501与第二压辊502之间的压料间隔进行辊压干燥处理，第一压辊501与第二压辊502的温度范围30℃-80℃，材料经过对辊是银浆中的水分等溶剂会受热挥发，溶剂会受热挥发后可以通过排气罩503收集，及时将挥发的水汽及时排出，防止湿度过大结露、粘接剂凝固粘接；第一压辊501与第二压辊502之间的压料间隔可调，在干燥的同时对材料施加一定的压力，粘接更结实，更平整。
上述复合集流体与箔材连接装置10，相比传统技术具有如下有益效果：
(1)通过涂覆部件300提供一种全新的金属箔材21与复合集流体22的连接方式即粘接方式，提高电流从电芯到电极端子的过流能力，解决高分子层无法过流的问题。
(2)通过对折导轨401使运行的箔材21与复合集流体22对折，使箔材21对折的两个面分别与复合集流体22的两个面贴合，对复合集流体22两面分别同时粘接箔材21，提高金属箔材21与集流体的接触面积，降低电阻，提高粘接力，是单面粘接的力的至少2倍。
(3)在箔材21与复合集流体22两面粘接前对箔材21进行预折弯，通过设置预折辊403的角度设置范围为20°-60°，将水平前进的箔材21进行预翻边实现预折弯，接着送入对折部件400，对折导轨401的尺寸逐步由宽及窄使得箔材21两面逐渐贴近复合集流体22，贴合效果好。
(4)当被涂覆粘接液的箔材21与复合集流体22通过对折部件400贴合后，箔材21与复合集流体22经过第一压辊501与第二压辊502之间的压料间隔进行辊压干燥处理，第一压辊501与第二压辊502的温度范围30℃-80℃加热辊干燥，干燥温度可以设置，第一压辊501与第二压辊502之间的压力可以根据需要调节，干燥效果佳。
(5)本发明中，采用凹版辊304涂覆粘接液，凹版辊304表面具有激光雕刻的网穴，网穴的深度和宽度决定了载墨量的多少，粘接液的涂覆量可以精准控制。
(6)复合集流体与箔材连接方法中，采用导电性强的粘接液，例如导电剂、炭黑、碳纳米管、导电金属等配制的粘接液，具体的主材料使用银粉、铜粉、金粉以及铝粉中的一种或几种，粘接液内还添加有增稠剂、粘接剂、润湿剂等，主材料导电性强，可以提高箔材21与复合集流体22之间的过流能力，粘接剂在金属箔材21与集流体之间提供粘接力，同时增稠剂的使用可以防止主材料的沉淀，补充粘接的作用，避免高温焊接，对材料无机械损伤。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和 改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (12)

  1. 一种复合集流体与箔材连接装置，其特征在于，包括箔材放卷辊、复合集流体放卷辊、涂覆部件、对折部件、压料部件以及收料部件，所述对折部件、所述压料部件以及收料部件依次顺序设置，所述涂覆部件包括进料管、回料管、料盒以及凹版辊，所述进料管与所述回料管均连接于所述料盒，所述凹版辊设置于所述料盒的出料口处，所述箔材放卷辊上的箔材依次经过所述涂覆部件以及所述对折部件，所述复合集流体放卷辊上的复合集流体进入所述对折部件，所述对折部件用于对箔材与复合集流体对折并导入所述压料部件进行干燥辊压。
  2. 根据权利要求1所述的复合集流体与箔材连接装置，其特征在于，所述涂覆部件还包括第一接近辊与第二接近辊，所述第一接近辊与所述第二接近辊设置于所述料盒的出料口处且均位于所述凹版辊的下方，所述第一接近辊、所述第二接近辊与所述凹版辊配合进行凹版涂布。
  3. 根据权利要求1所述的复合集流体与箔材连接装置，其特征在于，所述复合集流体与箔材连接装置还包括张力调节部件，所述张力调节部件包括过辊、摆辊、摆辊支架以及电位传感器，所述摆辊活动连接于所述摆辊支架，所述电位传感器安装于所述摆辊支架以用于检测所述摆辊的角位，所述过辊与所述摆辊间隔设置，所述箔材放卷辊与所述涂覆部件之间、和/或所述复合集流体放卷辊与所述对折部件之间、和/或所述压料部件与所述收料部件之间设置有所述张力调节部件。
  4. 根据权利要求1-3任意一项所述的复合集流体与箔材连接装置，其特征在于，所述对折部件包括对折导轨、预压辊以及预折辊，所述预压辊、所述预折辊均设置于所述对折导轨的进料端，所述对折导轨具有导向通道，所述导向通道的尺寸沿着物料前进方向逐渐收窄，所述预压辊用于预压复合集流体，所述 预折辊的角度设置范围为20°-60°，所述预折辊用于将水平前进的箔材进行预翻边。
  5. 根据权利要求1-3任意一项所述的复合集流体与箔材连接装置，其特征在于，所述压料部件还包括第一压辊以及第二压辊，所述第一压辊与所述第二压辊相对设置且所述第一压辊与所述第二压辊之间形成压料间隔，所述第一压辊与所述第二压辊之间的压料间隔可调。
  6. 根据权利要求5所述的复合集流体与箔材连接装置，其特征在于，所述压料部件还包括排气罩，所述排气罩罩设于所述第一压辊与所述第二压辊。
  7. 根据权利要求1-3、6任意一项所述的复合集流体与箔材连接装置，其特征在于，所述收料部件包括收卷辊与压辊，所述收卷辊与所述压辊相对设置且收卷辊与所述压辊之间形成收料间隔。
  8. 一种复合集流体与箔材连接方法，其特征在于，包括如下步骤：
    制备粘接液：所述粘接液的组分包括溶剂、分散剂、主材料、增稠剂、粘接剂以及润湿剂，所述粘接液固含量范围40-80％，粘度范围为50-400mpa.s；
    涂覆：将粘接液涂覆至箔材表面；
    箔材对折：将平整的箔材对折，使其对折的两个面分别与复合集流体的两个面贴合；
    辊压干燥：对贴合后的箔材与复合集流体进行辊压干燥处理；以及
    收卷。
  9. 根据权利要求8所述的复合集流体与箔材连接方法，其特征在于，所述粘接液中的溶剂为水性溶剂；
    和/或，所述分散剂包括铵盐类化合物以及聚磷酸盐中的一种或者两种所述分散剂在粘接液中的质量百分比为0.1-1％；
    和/或，所述主材料为银粉、铜粉、金粉以及铝粉中的一种或几种，所述主材料的粒径范围：0.1-10μm，所述主材料的在粘接液中的质量百分比为40-80％；
    和/或，所述增稠剂的粘度范围50-800mpa.s之间，所述增稠剂的在粘接液中的质量百分比为5-15％；
    和/或，所述粘接剂包括丙烯酸型粘接剂、丁苯胶乳、PVA、苯丙烯酸、聚丙烯酰胺、聚乙烯醇、聚乙烯吡咯烷酮、聚氧化乙烯、改性石蜡树脂、卡波树脂、聚丙烯酸类、聚氨酯丙烯酸酯、聚丙烯酸酯共聚乳液、聚氨酯以及氨基甲酸酯中的一种或几种，所述粘接剂在粘接液中的质量百分比为5-20％；
    和/或，所述润湿剂包含有机硅醚类的表面活性剂、阴离子型表面活性剂以及非离子型表面活性剂中的一种或几种，所述润湿剂在粘接液中的质量百分比为0.1-1％。
  10. 根据权利要求8所述的复合集流体与箔材连接方法，其特征在于，将粘接液涂覆至箔材表面时，涂覆方式包括凹版涂布、窄缝挤压、喷涂、浸涂、静电纺丝或者逗号涂布。
  11. 根据权利要求8所述的复合集流体与箔材连接方法，其特征在于，箔材对折时，具有包括如下步骤：
    通过预折辊将水平前进的箔材进行预翻边；
    通过预压辊使箔材和复合集流体靠近；
    通过对折导轨使运行的箔材与复合集流体对折，使箔材对折的两个面分别与复合集流体的两个面贴合。
  12. 根据权利要求8所述的复合集流体与箔材连接方法，其特征在于，箔材与复合集流体经过第一压辊与第二压辊之间的压料间隔进行辊压干燥处理，所述第一压辊与所述第二压辊的温度范围30℃-80℃。
PCT/CN2022/116806 2022-06-28 2022-09-02 复合集流体与箔材连接装置及其连接方法 WO2024000805A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210741966.5A CN115020631A (zh) 2022-06-28 2022-06-28 复合集流体与箔材连接装置及其连接方法
CN202210741966.5 2022-06-28

Publications (1)

Publication Number Publication Date
WO2024000805A1 true WO2024000805A1 (zh) 2024-01-04

Family

ID=83077707

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/116806 WO2024000805A1 (zh) 2022-06-28 2022-09-02 复合集流体与箔材连接装置及其连接方法

Country Status (2)

Country Link
CN (1) CN115020631A (zh)
WO (1) WO2024000805A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116705982A (zh) * 2023-08-02 2023-09-05 深圳海辰储能控制技术有限公司 用于电池的极片及其制备方法、电池和用电设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006040800A (ja) * 2004-07-29 2006-02-09 Hitachi Chem Co Ltd リチウム電池電極用バインダ樹脂溶液及びこの溶液と活物質から製造される電極および電池
CN108531118A (zh) * 2018-03-29 2018-09-14 深圳瑞隆新能源科技有限公司 一种导电胶粘结剂及其制备方法、软包电池极耳连接方法
CN207896200U (zh) * 2018-03-15 2018-09-21 宁德时代新能源科技股份有限公司 二次电池集流体的加工设备
CN207954926U (zh) * 2018-03-15 2018-10-12 宁德时代新能源科技股份有限公司 极片模切设备
CN112430442A (zh) * 2020-10-23 2021-03-02 重庆市紫建电子股份有限公司 一种正负极耳粘结剂及其制备方法、极片的制作方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006040800A (ja) * 2004-07-29 2006-02-09 Hitachi Chem Co Ltd リチウム電池電極用バインダ樹脂溶液及びこの溶液と活物質から製造される電極および電池
CN207896200U (zh) * 2018-03-15 2018-09-21 宁德时代新能源科技股份有限公司 二次电池集流体的加工设备
CN207954926U (zh) * 2018-03-15 2018-10-12 宁德时代新能源科技股份有限公司 极片模切设备
CN108531118A (zh) * 2018-03-29 2018-09-14 深圳瑞隆新能源科技有限公司 一种导电胶粘结剂及其制备方法、软包电池极耳连接方法
CN112430442A (zh) * 2020-10-23 2021-03-02 重庆市紫建电子股份有限公司 一种正负极耳粘结剂及其制备方法、极片的制作方法

Also Published As

Publication number Publication date
CN115020631A (zh) 2022-09-06

Similar Documents

Publication Publication Date Title
JP5701519B2 (ja) リチウムイオン二次電池電極用バインダー、これら電極用バインダーを用いて得られるスラリー、これらスラリーを用いて得られる電極およびこれら電極を用いて得られるリチウムイオン二次電池
KR101046857B1 (ko) 전기 이중층 커패시터 전극용 바인더
JP5594548B2 (ja) 電池用電極の製造方法
WO2024000805A1 (zh) 复合集流体与箔材连接装置及其连接方法
WO2022122033A1 (zh) 一种锂离子电池
TW201251182A (en) Slurries obtained using binder for cell electrodes, electrodes obtained using slurries, and lithium-ion secondary cell obtained using electrodes
CN105921343B (zh) 单体大容量锂离子电池制造方法和极片涂布设备
WO2016179785A1 (zh) 复合隔膜及使用该复合隔膜的锂离子电池
WO2018198940A1 (ja) 非水系二次電池多孔膜用バインダー組成物、非水系二次電池多孔膜用スラリー組成物、非水系二次電池用多孔膜、並びに非水系二次電池およびその製造方法
WO2023123751A1 (zh) 一种涂覆隔膜及其制备方法
CN110148697A (zh) 一种聚烯烃锂电池隔膜涂层浆料及其应用
WO2022151734A1 (zh) 一种固态电解质及其制备方法和应用
CN113036075B (zh) 一种极片及电芯
CN108649231A (zh) 一种具有补锂功能的涂碳铝箔及其制备方法
CN105470524A (zh) 一种动力电池用碳纳米管涂覆铝箔及其制备方法
TWI686002B (zh) 蓄電裝置用集電體、其製造方法及用於其製造之塗佈液
WO2015115201A1 (ja) 電気化学素子用電極及び電気化学素子
JP2016115576A (ja) リチウムイオン電池の製造方法、リチウムイオン電池の製造装置およびリチウムイオン電池
CN113745448A (zh) 一种极片的制备方法及锂电池
JP5293539B2 (ja) 支持体付電極活物質シート及び電気化学素子用電極の製造方法
CN113725399A (zh) 多层结构的电池极片及其制备方法
JP2005085557A (ja) リチウムイオン二次電池電極用スラリー組成物の製造方法
CN219677330U (zh) 一种卷绕式电芯及用电设备
TW202215688A (zh) 非水系蓄電池電極用黏合劑及非水系蓄電池電極用漿料
CN117497835A (zh) 固态电芯及其制备方法与固态电池

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22948895

Country of ref document: EP

Kind code of ref document: A1