Lithium battery processing and coating device

Abstract

The embodiment of the invention provides a lithium battery processing and coating device, and relates to the technical field of lithium battery processing. A lithium battery processing and coating device comprises a fixing box, an air cylinder barrel is arranged on the outer side of the fixing box, a fixing frame is fixedly connected to the outer side, close to the air cylinder barrel, of the fixing box, and coating die heads used for coating a lithium battery foil base material with slurry are fixedly connected to the upper side and the lower side, away from the fixing box, of the fixing frame; an adjusting assembly is arranged in an inner cavity of the fixing box and comprises a double-head motor embedded between the fixing box and the air cylinder barrel, a clamping assembly and a tensioning assembly are arranged on the outer side of the adjusting assembly, and the clamping assembly comprises a first supporting arm slidably arranged on one side of the fixing box. The tensioning assembly comprises a second supporting arm arranged on the other side of the fixing box in a sliding mode. The lithium battery foil base material is subjected to efficient and high-quality coating operation in a mode of combining rapid feeding, wrinkle removal and leveling, distance adjustment and error correction, spray cleaning and electrostatic adsorption.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium battery processing, and particularly relates to a coating device for lithium battery processing. Background Art

[0002] Coating is the process of evenly coating a slurry on the foil substrate of a lithium battery. The foil substrate of the lithium battery is a metal foil, mostly made of copper foil or aluminum foil. After drying treatment, an electrode plate is formed. For lithium-ion batteries, the quality of coating directly affects the battery capacity, internal resistance, cycle life, and safety.

[0003] In the prior art (a patent application with the publication number CN113000314B and the patent name of coating equipment for lithium battery processing), it is possible to clean the foil substrate, avoid quality defects caused by impurities, facilitate the adjustment of the coating thickness, and also prevent the precipitation of the slurry, resulting in uneven slurry density. In the process of implementing this technical solution, it is found that at least the following problems exist in the prior art:

[0004] In the process of the coating device coating the slurry on the foil substrate of the lithium battery, basically, a roller coating method is used with a coating roller for the foil substrate of the lithium battery. This not only easily leads to uneven coating of the slurry, with granular protrusions, but also results in weak adhesion of the coated slurry. Under the action of the extrusion stress generated by the coating roller, cracking and even falling off phenomena occur, reducing the coating quality. Summary of the Invention

[0005] This application aims to at least solve one of the technical problems in the prior art, that is, it is impossible to perform efficient and high-quality coating operations on the foil substrate of a lithium battery by combining rapid feeding, wrinkle removal and leveling, distance adjustment and error correction, spray cleaning, and electrostatic adsorption. Under the action of the extrusion stress generated by the coating roller, cracking and even falling off phenomena occur in the coated slurry, reducing the coating quality. For this reason, this application proposes a coating device for lithium battery processing.

[0006] To achieve the above object, the specific technical solution of the present invention is as follows:

[0007] A coating device for lithium battery processing includes a fixed box. A cylinder barrel is arranged on the outer side of the fixed box, and a fixed frame is fixedly connected to the outer side of the fixed box close to the cylinder barrel. Coating dies for coating the slurry on the foil substrate of the lithium battery are fixedly connected to both the upper and lower sides of the fixed frame away from the fixed box.

[0008] An adjustment assembly is arranged in the inner cavity of the fixed box. The adjustment assembly includes a double-headed motor embedded between the fixed box and the cylinder barrel. A clamping assembly and a tensioning assembly are respectively arranged on the outer side of the adjustment assembly. The clamping assembly includes a first arm sliding on one side of the fixed box, and the tensioning assembly includes a second arm sliding on the other side of the fixed box.

[0009] A supply component is provided on the cylinder barrel, and the supply component includes a first three-way valve connected to the cylinder barrel and having a suction head. A cleaning component and an electrostatic component are respectively provided on one side of the supply component. The cleaning component includes a cleaning roller rotating above a fixed box, and the electrostatic component includes electrostatic rollers rotating alternately between the cleaning rollers.

[0010] Preferably: The adjusting component further includes an electric push rod embedded in an output shaft of the double-headed motor, and a first main gear is fixedly connected to the outside of the electric push rod. A first driven gear is provided on the outside of the first main gear, and a reverse-threaded rod rotatably engaged with the fixed box is fixedly connected to the inner cavity of the first driven gear. Threaded sleeves are threadedly connected to both sides of the reverse-threaded rod.

[0011] Preferably: The clamping component further includes a positioning plug rotating inside the first arm, and a protective cover is fixedly connected to the outside of the first arm. A ratchet wheel is fixedly connected to the outside of the positioning plug, and pawls rotatably engaged with the protective cover are clamped around the ratchet wheel. A limiting spring fixedly engaged with the protective cover is fixedly connected to the outside of the pawl.

[0012] Preferably: The tensioning component further includes a chute opened on the second arm, and a slider is slidably connected to the inner cavity of the chute. Rotating heads are rotatably connected to both the upper and lower sides of the slider, and an elastic rope is fixedly connected to the inner side of the rotating head. A diagonal tension roller for removing wrinkles and flattening the lithium battery foil substrate is provided on the inner side of the elastic rope.

[0013] Preferably: The supply component further includes a second main gear fixed on the other output shaft of the double-headed motor, and a second driven gear is engaged with the second main gear. A cam is fixedly connected to the top of the second driven gear, and a connecting rod is hinged to the cam. The other end of the connecting rod is hinged to a piston slidably engaged with the cylinder barrel.

[0014] Preferably: The cleaning component further includes a primary pressure pipe connected to the first three-way valve, and the outer end of the primary pressure pipe is connected to a second three-way valve with a pressure sensor. Both ends of the second three-way valve are connected to secondary pressure pipes, and the outer ends of the secondary pressure pipes are connected to a manifold frame connected and matched with the cleaning roller. Injection holes are circumferentially opened on the manifold frame.

[0015] Preferably: The electrostatic component further includes electrostatic generators fixed on both sides of the fixed box, and a wiring pipe frame is provided inside the electrostatic generators. Conductive rods embedded and matched with the electrostatic rollers are provided inside the wiring pipe frame. Rotating ports are connected to the inner ends of the manifold frame and the wiring pipe frame, and connecting ports rotatably engaged with the rotating ports are connected to the outer ends of the cleaning roller and the electrostatic rollers.

[0016] Preferably, a slide rail groove is formed at the bottom of the inner cavity of the fixed box, and a slide rail block fixedly matched with the threaded sleeve is slidably connected in the inner cavity of the slide rail groove. Slide openings slidably matched with the first support arm and the second support arm are obliquely formed around the top of the fixed box.

[0017] Preferably, universal ball bearings fixedly connected with elastic ropes are rotatably connected to both ends of the diagonal tension roller. The inner ends of the elastic ropes are provided with straight tension rollers used in cooperation with the diagonal tension roller through the universal ball bearings. A distance-adjusting air cylinder with a correction head is embedded on the outer side of the second support arm.

[0018] Preferably, a flow cavity is formed in the inner cavity of the coating die head. Feeding heads communicated with the flow cavity are communicated and threadedly connected with outer plugs at both ends of the coating die head. A slit opening communicated with the flow cavity is formed on the inner side of the coating die head, and a material box is placed on the fixing frame.

[0019] The lithium battery processing coating device of the present invention has the following advantages:

[0020] 1. For the lithium battery processing coating device, first, after the electric push rod adjusts the meshing stroke between the first main gear and the first driven gear in place, the double-headed motor drives the positive and reverse threaded rod to rotate forward and backward through the first main gear and the first driven gear after meshing in place. The positive and reverse threaded rod drives the two threaded sleeves to expand outward or clamp inward accordingly. At the same time, the two threaded sleeves that expand outward or clamp inward drive the two positioning plugs to move through the two first support arms, so as to quickly load and unload the lithium battery foil substrate roll. The ratchets, pawls and limit springs in the two protective covers implement reverse restriction measures on the lithium battery foil substrate roll inside the two positioning plugs, improving the stability during the clamping and transmission of the lithium battery foil substrate roll. At the same time, the elastic ropes on the two second support arms drive the two diagonal tension rollers and the straight tension rollers to be tensioned through the chutes and sliders on the two second support arms. The two tensioned diagonal tension rollers and straight tension rollers are used to remove wrinkles and level the passing lithium battery foil substrate, which is beneficial to the subsequent coating and adhesion of the slurry on the flat lithium battery foil substrate. The correction heads on the two distance-adjusting air cylinders perform inner movement extrusion distance adjustment and error correction on the lithium battery foil substrate, so that the lithium battery foil substrate always maintains a horizontal and orderly transmission state to prevent the slurry after coating from being skewed.

[0021] 2. For this lithium battery processing and coating device, secondly, the double-headed motor drives the cam to rotate continuously through the second main gear and the second driven gear. The cam drives the piston on the connecting rod to reciprocate in the cylinder barrel, and the increased pressure generated in the cylinder barrel is conveyed through the first three-way valve. At the same time, the increased pressure conveyed by the first three-way valve reaches the two secondary pressure pipes through the second three-way valve on the primary pressure pipe. Then, the increased pressure is supplied into the cleaning rollers distributed diagonally by the two manifold brackets, and is evenly sprayed onto the upper and lower surfaces of the lithium battery foil substrate through the injection holes opened on the circumference. While cleaning the impurities attached to the upper and lower surfaces of the lithium battery foil substrate by high-pressure blowing, it also performs wind pressure treatment on the lithium battery foil substrate passing through the cleaning rollers, which is beneficial to the stable conveying of the lithium battery foil substrate. Immediately afterwards, two electrostatic generators apply an electrostatic field to the electrostatic rollers distributed alternately with the cleaning rollers through the conductive rods on the wiring pipe rack, and then evenly conduct the electrostatic field applied to the electrostatic rollers to the upper and lower surfaces of the passing lithium battery foil substrate, so that positive and negative charge ions are evenly distributed on the upper and lower surfaces of the lithium battery foil substrate, generating an electrostatic adsorption force, improving the adsorption force when the subsequent slurry is coated on the upper and lower surfaces of the lithium battery foil substrate, and preventing the slurry from cracking or falling off under the action of extrusion stress, thus improving the coating quality of the upper and lower surfaces of the lithium battery foil substrate.

[0022] 3. For this lithium battery processing and coating device, then, the electromagnet is first energized by the circuit breaker. After being energized, the electromagnet generates an electromagnetic adsorption force on the fixed magnet, so that the extension rod on the piston is connected and fixed to the bracket through the adsorbed electromagnet and fixed magnet. Then, the extension rod following the horizontal reciprocating motion of the piston moves along with the bracket in place. The horizontally reciprocating bracket drives the two plugging heads to alternately block and open the plugging grooves on the two coating dies, so that the slurry in the flow chambers of the two coating dies is coated on the upper and lower surfaces of the lithium battery foil substrate in an intermittent manner through the slit openings. According to actual requirements, continuous and intermittent coating control can be performed on the upper and lower surfaces of the lithium battery foil substrate. At the same time, the two plugging heads drive two wiping cottons to perform horizontal reciprocating motion at the slit openings of the two coating dies, so that the residual materials at the slit openings of the two coating dies using intermittent coating can be alternately wiped clean, preventing them from dripping onto the lithium battery foil substrate and causing pollution, further improving the slurry coating quality of the lithium battery foil substrate. The optical rod bracket and the buffer spring play a role in sliding and limiting the horizontally reciprocating bracket, and the T-shaped grooves and T-shaped bars play a role in quickly pulling and replacing the two wiping cottons. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 This is the initial state diagram of the structure of a lithium battery processing coating device according to the present invention;

[0025] Figure 2 This is the working state diagram of the structure of a lithium battery processing coating device according to the present invention;

[0026] Figure 3 This is a partial cross-sectional view of the structure of a lithium battery processing coating device according to the present invention;

[0027] Figure 4 This is the bottom view of the initial state of the structure of a lithium battery processing coating device according to the present invention;

[0028] Figure 5 This is the top view of the working state of the structure of a lithium battery processing coating device according to the present invention;

[0029] Figure 6 This is the cross-sectional view of the initial state of the structure of the fixed box, adjustment component, clamping component and tensioning component according to the present invention;

[0030] Figure 7 This is the bottom view of the working state of the adjustment component, clamping component and tensioning component according to the present invention;

[0031] Figure 8 This is the side cross-sectional view of the initial state of the adjustment component and clamping component according to the present invention;

[0032] Figure 9 This is the partial exploded view of the clamping component structure according to the present invention;

[0033] Figure 10 This is the side view of the working state of the adjustment component and tensioning component according to the present invention;

[0034] Figure 11 This is the side cross-sectional view of the cylinder barrel, supply component, cleaning component and electrostatic component according to the present invention;

[0035] Figure 12 This is the exploded cross-sectional view of the cleaning component structure according to the present invention;

[0036] Figure 13 This is the exploded cross-sectional view of the electrostatic component structure according to the present invention;

[0037] Figure 14 This is the side cross-sectional view of the initial state of the cylinder barrel, coating die head, supply component, regulation component and auxiliary component according to the present invention;

[0038] Figure 15 This is the bottom view of the working state of the supply component, regulation component and auxiliary component according to the present invention;

[0039] Figure 16 This is a partial exploded view of the coating die head, regulation component and auxiliary component structures of the present invention.

[0040] Explanation of the markings in the figure: 1. Fixed box; 2. Cylinder barrel; 3. Fixed frame; 4. Coating die head; 51. Double-headed motor; 52. Electric push rod; 53. First main gear; 54. First driven gear; 55. Positive and negative threaded rod; 56. Thread sleeve; 61. First support arm; 62. Positioning plug; 63. Protective cover; 64. Ratchet; 65. Pawl; 66. Limiting spring; 71. Second support arm; 72. Slide groove; 73. Slide block; 74. Rotating head; 75. Elastic cord; 76. Oblique tension roller; 81. Second main gear; 82. Second driven gear; 83. Cam; 84. Connecting rod; 85. Piston; 86. First three-way valve; 91. First-stage pressurizing pipe; 92. Second three-way valve; 93. Second-stage pressurizing pipe; 94. Manifold frame; 95. Cleaning roller; 96. Injection hole; 101. Electrostatic generator; 102. Wiring pipe frame; 103. Conductive rod; 104. Electrostatic roller; 105. Rotating port; 106. Connecting port; 111. Circuit breaker; 112. Extension rod; 113. Electromagnet; 114. Fixed magnet; 115. Bracket; 116. Plugging head; 121. Plugging groove; 122. T-shaped groove; 123. T-shaped strip; 124. Wiping cotton; 125. Smooth rod frame; 126. Buffer spring; 13. Slide rail groove; 14. Slide rail block; 15. Slide port; 16. Universal ball; 17. Straight tension roller; 18. Spacing adjustment cylinder; 19. Correction head; 20. Injection head; 21. Material box. Detailed implementation manners

[0041] The following provides a specific introduction to the present invention in combination with the accompanying drawings and specific embodiments:

[0042] As Figures 1 - 16 shown, a lithium battery processing coating device of the present invention includes a fixed box 1. A cylinder barrel 2 is arranged on the outer side of the fixed box 1, and a fixed frame 3 is fixedly connected to the outer side of the fixed box 1 close to the cylinder barrel 2. Coating die heads 4 for coating slurry on the lithium battery foil substrate are fixedly connected to both the upper and lower sides of the fixed frame 3 away from the fixed box 1. A flow cavity is opened in the inner cavity of the coating die head 4 to facilitate the injection and flow of the slurry. Both ends of the coating die head 4 are communicated with injection heads 20 that are in communication and cooperation with the flow cavity and are threadedly connected with outer plugging heads, which is convenient for injecting the slurry into the flow cavity in the coating die head 4 in an externally pressurized manner. A slit opening that is in communication and cooperation with the flow cavity is opened on the inner side of the coating die head 4. Then, the slurry in the flow cavity is coated on the upper and lower surfaces of the lithium battery foil substrate through the slit opening. A material box 21 is placed on the fixed frame 3 to temporarily store the used materials or tools;

[0043] The inner cavity of the fixed box 1 is provided with an adjusting assembly, and the adjusting assembly includes a double-headed motor 51 embedded between the fixed box 1 and the cylinder barrel 2. A clamping assembly and a tensioning assembly are respectively arranged on the outer side of the adjusting assembly. The clamping assembly includes a first arm 61 sliding on one side of the fixed box 1, and the tensioning assembly includes a second arm 71 sliding on the other side of the fixed box 1, which can perform rapid loading and unloading operations on the lithium battery foil substrate roll, improve the stability during the clamping and transmission of the lithium battery foil substrate roll. At the same time, the passing lithium battery foil substrate is subjected to wrinkle removal and leveling treatment, which is beneficial to the subsequent coating and adhesion of the slurry on the flat lithium battery foil substrate;

[0044] A supply assembly is arranged on the cylinder barrel 2, and the supply assembly includes a first three-way valve 86 connected to the cylinder barrel 2 and provided with a suction head. A cleaning assembly and an electrostatic assembly are respectively arranged on one side of the supply assembly. The cleaning assembly includes a cleaning roller 95 rotating above the fixed box 1, which can not only perform high-pressure blowing and cleaning on the impurities attached to the upper and lower surfaces of the lithium battery foil substrate, but also perform air pressure treatment on the lithium battery foil substrate passing through the cleaning roller 95, which is beneficial to the stable conveying work of the lithium battery foil substrate;

[0045] The electrostatic assembly includes electrostatic rollers 104 rotating alternately between the cleaning rollers 95, which evenly conduct the applied electrostatic field to the upper and lower surfaces of the passing lithium battery foil substrate, so that positive and negative charge ions are evenly distributed on the upper and lower surfaces of the lithium battery foil substrate, and an electrostatic adsorption force is generated, which improves the adsorption force when the subsequent slurry is coated on the upper and lower surfaces of the lithium battery foil substrate, so as to prevent the slurry from cracking or falling off under the action of extrusion stress, and improve the coating quality of the upper and lower surfaces of the lithium battery foil substrate.

[0046] As Figures 6 - 13 shown, the adjusting assembly further includes an electric push rod 52 embedded in an output shaft of the double-headed motor 51. A first main gear 53 is fixedly connected to the outer side of the electric push rod 52. A first driven gear 54 is arranged on the outer side of the first main gear 53. A positive and negative threaded rod 55 rotatably matched with the fixed box 1 is fixedly connected to the inner cavity of the first driven gear 54. After the electric push rod 52 adjusts the meshing stroke between the first main gear 53 and the first driven gear 54 in place, the double-headed motor 51 drives the positive and negative threaded rod 55 to rotate forward and backward through the meshed first main gear 53 and first driven gear 54. Threaded sleeves 56 are threadedly connected to both sides of the positive and negative threaded rod 55, and the positive and negative threaded rod 55 drives the two threaded sleeves 56 to expand outward or clamp inward accordingly;

[0047] The clamping assembly further includes a positioning plug 62 rotatably disposed inside the first support arm 61. Two sets of threaded sleeves 56 that expand outwardly or clamp inwardly drive the two sets of positioning plugs 62 to move therewith through the two first support arms 61, performing rapid loading and unloading operations on the lithium battery foil substrate roll. A protective cover 63 is fixedly connected to the outer side of the first support arm 61, a ratchet 64 is fixedly connected to the outer side of the positioning plug 62, and pawls 65 that are rotationally engaged with the protective cover 63 are clamped around the ratchet 64. A limiting spring 66 that is fixedly engaged with the protective cover 63 is fixedly connected to the outer side of the pawl 65. The ratchets 64, pawls 65, and limiting springs 66 inside the two protective covers 63 implement reverse limiting measures on the lithium battery foil substrate roll inside the two positioning plugs 62, improving the stability during the clamping and transmission of the lithium battery foil substrate roll;

[0048] The tensioning assembly further includes a chute 72 formed in the second support arm 71, and a slider 73 is slidably connected to the inner cavity of the chute 72. Rotating heads 74 are rotatably connected to both the upper and lower sides of the slider 73, and an elastic cord 75 is fixedly connected to the inner side of the rotating head 74. Two sets of threaded sleeves 56 that expand outwardly or clamp inwardly drive the elastic cords 75 on the two rotating heads 74 to perform tensioning treatment on the two sets of diagonal tension rollers 76 and the straight tension roller 17 through the chutes 72 and sliders 73 on the two second support arms 71 in sequence. A diagonal tension roller 76 for removing wrinkles and flattening the lithium battery foil substrate is disposed inside the elastic cord 75. The two sets of diagonal tension rollers 76 and the straight tension roller 17 after tensioning are used to remove wrinkles and flatten the passing lithium battery foil substrate, facilitating the subsequent coating and adhesion of the slurry on the flat lithium battery foil substrate;

[0049] A slide rail groove 13 is formed at the bottom inside the fixed box 1, and a slide rail block 14 fixedly engaged with the threaded sleeve 56 is slidably connected to the inner cavity of the slide rail groove 13, playing a role in sliding limit for the threaded sleeve 56 and improving the overall sliding stability of the threaded sleeve 56, the first support arm 61, and the second support arm 71. Slide openings 15 that are slidably engaged with the first support arm 61 and the second support arm 71 are inclinedly formed around the top of the fixed box 1, further playing a role in sliding support for the first support arm 61 and the second support arm 71 to prevent the first support arm 61 and the second support arm 71 from shaking and skewing during sliding;

[0050] Both ends of the stay cable roller 76 are rotatably connected with universal ball bearings 16 fixedly connected to the elastic rope 75, which plays a role of universal movable connection between the elastic rope 75, the stay cable roller 76 and the straight pull roller 17, facilitating the change of the tensile displacement of the stay cable roller 76 and the straight pull roller 17. And the inner end of the elastic rope 75 is provided with a straight pull roller 17 used in cooperation with the stay cable roller 76 through the universal ball bearing 16. Matching the diagonal leveling method of the stay cable roller 76, the lithium battery foil substrate is subjected to wrinkle removal and leveling treatment in a straight leveling method. The outer side of the second support arm 71 is embedded with an adjustable distance cylinder 18 with a correction head 19, which plays a role of adjustable distance and error correction for the lithium battery foil substrate passing through the transmission, so as to prevent the lithium battery foil substrate from skewing and shaking during transmission. Both the stay cable roller 76 and the straight pull roller 17 are made of insulating materials to improve the insulation of the stay cable roller 76 and the straight pull roller 17, so as not to affect the uniformity of the distribution of charged ions on the upper and lower surfaces of the lithium battery foil substrate.

[0051] The supply assembly further includes a second main gear 81 fixed on the other output shaft of the double-headed motor 51, and a second driven gear 82 is meshed with the second main gear 81. The top of the second driven gear 82 is fixedly connected with a cam 83, and a connecting rod 84 is hinged on the cam 83. The other end of the connecting rod 84 is hinged with a piston 85 slidably matched with the cylinder barrel 2. First, the double-headed motor 51 drives the cam 83 to rotate continuously through the second main gear 81 and the second driven gear 82. The cam 83 drives the piston 85 on the connecting rod 84 to reciprocate in the cylinder barrel 2, and the increased pressure generated in the cylinder barrel 2 is conveyed through the first three-way valve 86;

[0052] The cleaning assembly further includes a first-stage pressure pipe 91 connected to the first three-way valve 86, and the outer end of the first-stage pressure pipe 91 is connected to a second three-way valve 92 with a pressure sensor. Both ends of the second three-way valve 92 are connected to second-stage pressure pipes 93. The increased pressure conveyed by the first three-way valve 86 reaches the two second-stage pressure pipes 93 through the second three-way valve 92 on the first-stage pressure pipe 91. And the outer ends of the second-stage pressure pipes 93 are connected to a manifold bracket 94 connected and matched with the cleaning rollers 95. The manifold bracket 94 is circumferentially provided with injection holes 96. Then, the increased pressure is supplied into the diagonally distributed cleaning rollers 95 by the two manifold brackets 94, and is evenly sprayed onto the upper and lower surfaces of the lithium battery foil substrate through the circumferentially arranged injection holes 96. While high-pressure purging and cleaning the impurities attached to the upper and lower surfaces of the lithium battery foil substrate, it also performs a wind pressure treatment on the lithium battery foil substrate passing through the cleaning rollers 95, facilitating the stable conveying work of the lithium battery foil substrate;

[0053] The static electricity component further includes static electricity generators 101 fixed on both sides of the fixed box 1. A wiring pipe holder 102 is arranged inside the static electricity generator 101, and a conductive rod 103 that is embedded and matched with the static electricity roller 104 is arranged inside the wiring pipe holder 102. The two groups of static electricity generators 101 apply an electrostatic field to the static electricity rollers 104 that are staggered with the cleaning roller 95 through the conductive rods 103 on the wiring pipe holder 102. The inner ends of the manifold holder 94 and the wiring pipe holder 102 are both communicated with a rotating port 105. The outer ends of the cleaning roller 95 and the static electricity rollers 104 are both communicated with a connecting port 106 that is rotationally matched with the rotating port 105. Then, the electrostatic field applied to the static electricity rollers 104 is evenly electrically conducted to the upper and lower surfaces of the passing lithium battery foil substrate, so that positive and negative charge ions are evenly distributed on the upper and lower surfaces of the lithium battery foil substrate, and an electrostatic adsorption force is generated, improving the adsorption force when the subsequent slurry is coated on the upper and lower surfaces of the lithium battery foil substrate, so as to prevent the slurry from cracking or falling off under the action of extrusion stress.

[0054] As Figures 14 - 16 shown, during the process of coating the slurry onto the lithium battery foil substrate, a continuous coating method is mostly adopted. Due to the design requirements of the lithium battery, the means of adjusting between continuous and intermittent cannot be used to flexibly coat lithium battery foil substrates with different design requirements. A regulating component and an auxiliary component that are used in combination with the coating die head 4 are respectively arranged on the supply component. The regulating component includes a circuit breaker 111 fixed on one side of the cylinder barrel 2. An extension rod 112 that is slidably matched with the cylinder barrel 2 is fixedly connected to the outside of the piston 85. The sliding part between the extension rod 112 and the cylinder barrel 2 is subjected to sealing sliding treatment by a sealing sliding sleeve. An electromagnet 113 is fixedly connected to the outside of the extension rod 112, and a fixed magnet 114 is arranged outside the electromagnet 113. A bracket 115 is fixedly connected to the outside of the fixed magnet 114. First, the circuit breaker 111 energizes the electromagnet 113. After being energized, the electromagnet 113 generates an electromagnetic adsorption force on the fixed magnet 114, so that the extension rod 112 on the piston 85 is connected and fixed to the bracket 115 through the adsorbed electromagnet 113 and fixed magnet 114. Plugging heads 116 are fixedly connected to both the upper and lower sides of the bracket 115;

[0055] The auxiliary component includes a plugging groove 121 opened near the slit opening of the coating die head 4 and alternately inserted and matched with the plugging head 116. The extension rod 112 that moves horizontally back and forth with the piston 85 moves accordingly through the bracket 115 that is connected in place. The horizontally reciprocating bracket 115 drives the two groups of plugging heads 116 to perform alternate plugging and opening operations on the plugging grooves 121 on the two groups of coating die heads 4, so that the slurry in the flow cavities of the two groups of coating die heads 4 is used to coat the upper and lower surfaces of the lithium battery foil substrate in an intermittent manner. According to actual requirements, continuous and intermittent coating regulation can be carried out on the upper and lower surfaces of the lithium battery foil substrate. Moreover, a T-shaped groove 122 is opened on the inner side of the plugging head 116 close to the slit opening of the coating die head 4. A T-shaped strip 123 is clamped in the T-shaped groove 122, and a wiping cotton 124 for wiping the residual material at the slit opening of the coating die head 4 is fixedly connected to the inner side of the T-shaped strip 123. The two wiping cottons 124 are driven by the two groups of plugging heads 116 to perform horizontal reciprocating movements at the slit openings of the two groups of coating die heads 4, so as to alternately wipe the residual material at the slit openings of the two groups of coating die heads 4 using intermittent coating, preventing it from dripping onto the lithium battery foil substrate and causing pollution, and further improving the slurry coating quality of the lithium battery foil substrate. Both sides of the bracket 115 are fixedly connected with optical rod brackets 125 that are slidably matched with the fixed frame 3. A buffer spring 126 fixedly matched with the fixed frame 3 is sleeved on the optical rod bracket 125, and the optical rod bracket 125 and the buffer spring 126 play a role of sliding limit matching for the horizontally reciprocating bracket 115. The T-shaped groove 122 and the T-shaped strip 123 play a role of quickly pulling and replacing the two wiping cottons 124.

[0056] Working principle of a lithium battery processing and coating device: First, control the electric push rod 52 to start and drive the first main gear 53 to move forward and engage with the meshing part of the first driven gear 54. Then, control the double-headed motor 51 to start and drive the left-right threaded rod 55 on the first driven gear 54 to rotate forward through the engaged first main gear 53. The left-right threaded rod 55 drives the two thread sleeves 56 to move outwards synchronously. The two thread sleeves 56 drive the two first support arms 61 and the second support arms 71 to move outwards accordingly. After the two first support arms 61 drive the two positioning plugs 62 to move outwards in place, immediately control the external AGV cart to roll-feed the lithium battery foil substrate to be coated to the clamping area of the two positioning plugs 62, and then control the double-headed motor 51 to rotate in the reverse direction. Similarly, the two thread sleeves 56 on the left-right threaded rod 55 move inwards and clamp the lithium battery foil substrate roll in place through the positioning plugs 62 on the two first support arms 61. After the clamping and loading of the lithium battery foil substrate roll is completed, guide the lithium battery foil substrate on it to an external rewinder for transmission. During this period, the lithium battery foil substrate in the transmission state drives the ratchets 64 in the two protective covers 63 to rotate synchronously through the two positioning plugs 62. With the elastic support of the two limit springs 66 for the two ratchet pawls 65, the two ratchets 64 rotating together force the two ratchet pawls 65 to perform a tooth skipping action on them, implementing a reverse restriction measure for the clamped and loaded and pulled and transmitted lithium battery foil substrate;

[0057] Meanwhile, the chute 72 and the slider 73 provide a stroke sliding fit for the tensioning actions of the diagonal rollers 76 and the straight rollers 17 on the two elastic ropes 75, and the rotating head 74 and the universal balls 16 provide a steering fit between the two elastic ropes 75 and the diagonal rollers 76 and the straight rollers 17. Then, the two second support arms 71 in the outward movement state drive the two diagonal rollers 76 and the straight rollers 17 to be tensioned accordingly through the upper and lower two elastic ropes 75 until the two diagonal rollers 76 and the straight rollers 17 cover the upper and lower surfaces of the lithium battery foil substrate. Under the action of the self-driving force of the lithium battery foil substrate, the two diagonal rollers 76 and the straight rollers 17 wrinkle-remove and flatten the transmitted lithium battery foil substrate in a combined diagonal and straight manner; After the lithium battery foil substrate roll is clamped and loaded and the two diagonal rollers 76 and the straight rollers 17 are tensioned in place, first control the double-headed motor 51 to pause, then control the electric push rod 52 to close and drive the first main gear 53 to move inwards and disengage from the meshing part of the first driven gear 54 to the initial position. Moreover, the lithium battery foil substrate roll still maintains the clamped and loaded state, and the two diagonal rollers 76 and the straight rollers 17 still maintain the tensioned-in-place state. Meanwhile, control the two distance-adjusting cylinders 18 to start and correct the distance of the transmitted lithium battery foil substrate through the correction heads 19, so that the flattened and corrected lithium battery foil substrate can be stably transmitted to the coating area of the narrow slits of the upper and lower two coating dies 4 and wait for the coating operation;

[0058] Meanwhile, control the double-headed motor 51 to keep running continuously, drive the cam 83 on the second driven gear 82 to rotate through the second main gear 81, the cam 83 drives the piston 85 on the connecting rod 84 to reciprocate and do work in the cylinder barrel 2, and supply the increased pressure generated in the cylinder barrel 2 to the second three-way valve 92 on the primary pressurized pipe 91 through the first three-way valve 86. Then, through the rotating port 105 and the connecting port 106, it realizes the rotating and intercommunicating cooperation between the manifold frame 94 and the cleaning roller 95, as well as between the wiring pipe frame 102 and the static roller 104. Then, the manifold frame 94 on the two secondary pressurized pipes 93 supplies the cleaning roller 95 distributed diagonally through the rotating port 105 and the connecting port 106 at this position. The evenly distributed spray holes 96 on the circumference spray and blow-clean the upper and lower surfaces of the lithium battery foil substrate passing through, and at the same time apply wind pressure to the upper and lower surfaces to force the lithium battery foil substrate to be stably transmitted in the cleaning roller 95. Meanwhile, control the two groups of electrostatic generators 101 to start and conduct electricity to the conductive rod 103 through the wiring pipe frame 102, and then the conductive rod 103 applies an electrostatic field to the static roller 104 distributed alternately with the cleaning roller 95. Under the action of the electrostatic field intensity of the electrostatic field on the static roller 104, the upper and lower surfaces of the lithium battery foil substrate passing through the static roller 104 are evenly carried with positive and negative charge ions;

[0059] And according to the design requirements of the lithium battery, when it is necessary to continuously coat the upper and lower surfaces of the lithium battery foil substrate, the slurry in the external material pot is pressurized and injected into the flow cavities in the two coating dies 4 through the two injection heads 20. Under the action of the injected external pressure, the slurry in the flow cavities is forced to be coated on the upper and lower surfaces of the lithium battery foil substrate through the slit openings of the two coating dies 4. At this time, the plug 116 is at the initial position of the channels of the flow cavity and the plugging groove 121, but the plug 116 still keeps the outermost side of the plugging groove 121 plugged to prevent the slurry in the flow cavity from leaking and discharging pressure from the plugging groove 121. And under the action of the electrostatic field intensity of the electrostatic field of the positive and negative charge ions, the slurry is forced to adhere tightly and stably to the upper and lower surfaces of the lithium battery foil substrate, and then the subsequent drying process evenly dries the slurry on the upper and lower surfaces of the coated lithium battery foil substrate;

[0060] When intermittent coating is required on the upper and lower surfaces of a lithium battery foil substrate according to the design requirements of the lithium battery, first control the circuit breaker 111 to turn on and energize the electromagnet 113. After being energized, the electromagnet 113 generates an electromagnetic adsorption force on the fixed magnet 114 that maintains an initial fitting state with it. At the same time, under the sliding buffer cooperation of the optical rod holder 125 and the buffer spring 126 on the bracket 115, the piston 85 that performs horizontal reciprocating work drives the bracket 115 to move horizontally back and forth through the electromagnet 113 and the fixed magnet 114 that are in place by electromagnetic adsorption on the extension rod 112. The horizontally reciprocating bracket 115 drives the upper and lower groups of plugging heads 116 to alternately penetrate into the plugging grooves 121, alternately opening and closing the plugging grooves 121 and the slit channels on one side of the flow chamber, so that the slurry in the flow chamber intermittently coats the upper and lower surfaces of the passing lithium battery foil substrate through the alternately opened and closed slit channels. At the same time, the wiping cotton 124 that moves horizontally back and forth following the two groups of plugging heads 116 alternately wipes and cleans the residues at the slit openings of the intermittent coating. When the two wiping cottons 124 need to be replaced regularly, the two T-shaped bars 123 can be directly pulled out from the T-shaped grooves 122 on the two groups of plugging heads 116 in the initial state and then replaced.

[0061] It should be noted that the specific model specifications of the double-headed motor 51, the electric push rod 52, the electrostatic generator 101, the circuit breaker 111, the electromagnet 113, and the distance-adjusting cylinder 18 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0062] The power supply circuits of the double-headed motor 51, the electric push rod 52, the electrostatic generator 101, the circuit breaker 111, the electromagnet 113, and the distance-adjusting cylinder 18 are clear to those skilled in the art and will not be described in detail here.

[0063] It can be understood that the present invention is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present invention, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A lithium battery processing and coating device, comprising a fixed box (1), characterized in that: On the outer side of the fixed box (1), a cylinder barrel (2) is provided, and a fixed frame (3) is fixedly connected to the outer side of the fixed box (1) close to the cylinder barrel (2). On the upper and lower sides of the fixed frame (3) away from the fixed box (1), coating dies (4) for coating slurry on the lithium battery foil substrate are fixedly connected; An adjusting component is arranged in the inner cavity of the fixed box (1), and the adjusting component includes a double-headed motor (51) embedded between the fixed box (1) and the cylinder barrel (2). A clamping component and a tensioning component are respectively arranged on the outer side of the adjusting component. The clamping component includes a first support arm (61) sliding on one side of the fixed box (1), and the tensioning component includes a second support arm (71) sliding on the other side of the fixed box (1); A supply component is arranged on the cylinder barrel (2), and the supply component includes a first three-way valve (86) communicated with the cylinder barrel (2) and having a suction head. A cleaning component and an electrostatic component are respectively arranged on one side of the supply component. The cleaning component includes a cleaning roller (95) rotating above the fixed box (1), and the electrostatic component includes an electrostatic roller (104) rotating alternately between the cleaning rollers (95).

2. The lithium battery processing and coating device according to claim 1, characterized in that: The adjusting component further includes an electric push rod (52) embedded in an output shaft of the double-headed motor (51). A first main gear (53) is fixedly connected to the outer side of the electric push rod (52). A first driven gear (54) is arranged on the outer side of the first main gear (53). A positive and reverse threaded rod (55) rotatably matched with the fixed box (1) is fixedly connected to the inner cavity of the first driven gear (54). Threaded sleeves (56) are threadedly connected to both sides of the positive and reverse threaded rod (55).

3. The lithium battery processing and coating device according to claim 2, characterized in that: The clamping component further includes a positioning plug (62) rotating inside the first support arm (61). A protective cover (63) is fixedly connected to the outer side of the first support arm (61). A ratchet wheel (64) is fixedly connected to the outer side of the positioning plug (62). Pawls (65) rotatably matched with the protective cover (63) are clamped around the ratchet wheel (64). A limiting spring (66) fixedly matched with the protective cover (63) is fixedly connected to the outer side of the pawl (65).

4. A lithium battery processing and coating device according to claim 3, characterized in that: The tensioning component further includes a sliding groove (72) formed in the second support arm (71). A slider (73) is slidably connected to the inner cavity of the sliding groove (72). Rotating heads (74) are rotatably connected to the upper and lower sides of the slider (73). An elastic cord (75) is fixedly connected to the inner side of the rotating head (74). A diagonal tension roller (76) for removing wrinkles and leveling the lithium battery foil substrate is arranged on the inner side of the elastic cord (75).

5. The lithium battery processing and coating device according to claim 4, wherein: The supply component further includes a second main gear (81) fixed on the other output shaft of the double-headed motor (51). A second driven gear (82) is meshed with the second main gear (81). A cam (83) is fixedly connected to the top of the second driven gear (82). A connecting rod (84) is hinged to the cam (83). The other end of the connecting rod (84) is hinged to a piston (85) slidably matched with the cylinder barrel (2).

6. The lithium battery processing and coating device according to claim 5, wherein: The cleaning assembly further includes a primary pressurizing pipe (91) connected to the first three-way valve (86), and the outer end of the primary pressurizing pipe (91) is connected to a second three-way valve (92) with a pressure sensor. Both ends of the second three-way valve (92) are connected to secondary pressurizing pipes (93), and the outer ends of the secondary pressurizing pipes (93) are connected to a manifold bracket (94) that is connected and cooperates with the cleaning roller (95). The manifold bracket (94) is circumferentially provided with injection holes (96).

7. A lithium battery processing and coating device according to claim 6, characterized in that: The electrostatic assembly further includes electrostatic generators (101) fixed on both sides of the fixed box (1), and a wiring pipe bracket (102) is arranged inside the electrostatic generators (101). A conductive rod (103) that is embedded and cooperates with the electrostatic roller (104) is arranged inside the wiring pipe bracket (102). The inner ends of the manifold bracket (94) and the wiring pipe bracket (102) are both connected to a rotating port (105). The outer ends of the cleaning roller (95) and the electrostatic roller (104) are both connected to a connecting port (106) that rotates and cooperates with the rotating port (105).

8. A lithium battery processing and coating device according to claim 7, characterized in that: A slide rail groove (13) is opened at the bottom of the inner cavity of the fixed box (1), and a slide rail block (14) fixedly matched with the threaded sleeve (56) is slidably connected inside the slide rail groove (13). Slide openings (15) that are slidably matched with the first support arm (61) and the second support arm (71) are obliquely opened around the top of the fixed box (1).

9. The lithium battery processing and coating device according to claim 8, wherein: Both ends of the diagonal tension roller (76) are rotatably connected to universal ball bearings (16) fixedly connected to the elastic ropes (75). The inner ends of the elastic ropes (75) are provided with a straight tension roller (17) that is used in combination with the diagonal tension roller (76) through the universal ball bearings (16). An adjustable distance cylinder (18) with a correction head (19) is embedded on the outer side of the second support arm (71).

10. A lithium battery processing and coating device according to claim 9, characterized in that: A flow cavity is opened inside the coating die head (4), and injection heads (20) that are connected and cooperate with the flow cavity are connected to both ends of the coating die head (4) and are threadedly connected with outer plugs. A slit opening that is connected and cooperates with the flow cavity is opened inside the coating die head (4), and a material box (21) is placed on the fixed frame (3).

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