A copper foil cleaning device and cleaning method for preparing battery negative electrode sheets

Abstract

This application provides a copper foil cleaning device and method for preparing battery negative electrode sheets. The cleaning device includes an operating table with a first and second suction cup symmetrically arranged on its top surface for fixing the copper foil during cleaning. A cleaning section includes a set of strip seats symmetrically arranged at both ends of the operating table, with a cleaning component on the opposite side of each strip seat for cleaning the copper foil. A flipping component, located on one side of the operating table, is used to flip the first suction cup 180° so that the copper foil with the first side cleaned is flipped onto the second suction cup. A replenishment stage is located on the side of the operating table facing the flipping component, used to replenish lint-free cloths upwards. Using the solution provided in this application, lint-free cloths can be automatically replaced, and both sides of the copper foil can be cleaned. Excess anhydrous ethanol remaining on the surface of the copper foil during cleaning can be wiped away simultaneously, resulting in high efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of copper foil cleaning equipment, and particularly relates to a copper foil cleaning device and cleaning method for preparing battery negative electrode sheets. Background Technology

[0002] The copper foil used in the production of battery negative electrode sheets is mostly cut into sheet-like structures. After cutting, some impurities usually remain on the surface of the copper foil. Therefore, it is usually necessary to clean both sides of the copper foil before making the negative electrode sheet.

[0003] Current cleaning methods mostly rely on manual labor. Workers hold a lint-free cloth, dip it in cleaning solution, and wipe the surface of the copper foil. While wiping the copper foil does clean its surface, the amount of cleaning solution applied each time cannot be controlled, causing the residual cleaning solution on the copper foil surface to not evaporate quickly enough, affecting the efficiency of subsequent negative electrode sheet production. Some cleaning devices are designed to clean both sides of the copper foil, but after cleaning, a special fan is needed to dry the residual cleaning solution on the copper foil surface, resulting in a complex structure and high cost. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this invention provides a copper foil cleaning device and method for preparing battery negative electrode sheets. The device can automatically replace the lint-free cleaning cloth and clean both sides of the copper foil. It can also simultaneously wipe away excess cleaning fluid remaining on the surface of the copper foil during cleaning, resulting in high efficiency.

[0005] In order to achieve the objective of this invention, the following solution is proposed:

[0006] A copper foil cleaning apparatus for preparing battery negative electrode sheets includes:

[0007] The operating table is symmetrically equipped with a first suction cup and a second suction cup on its top surface, which are used to fix the copper foil during cleaning.

[0008] The cleaning unit includes a set of strip seats symmetrically arranged at both ends of the operating table. Each set of strip seats has a groove on its opposite side. A cleaning component is slidably arranged in each groove. The groove includes a straight groove section and a recessed section at one end of the straight groove section. The cross-section of the groove is T-shaped, with its horizontal part arranged vertically. The cleaning component includes a receiving box for holding cleaning fluid. The bottom of the receiving box has a strip groove for providing a channel for the cleaning fluid to flow out. The bottom two ends of the receiving box are respectively provided with picking plates. One end of the receiving box is provided with a square shaft. One end of the square shaft is rotatably provided with a rotating sleeve. The rotating sleeve is in rolling engagement with the horizontal part of the groove, and the square shaft is in sliding engagement with the vertical part of the groove. When the rotating sleeve is in the recessed section, the picking plate picks up a clean lint-free cloth. A vertically arranged inverted T-shaped pressure plate is provided in the strip groove. The two ends of the horizontal part of the pressure plate are respectively connected to the bottom of the receiving box by springs for pressing the lint-free cloth during cleaning. One end of the vertical part of the pressure plate is provided with an elastic sealing strip for sealing the strip groove before cleaning or opening the strip groove during cleaning.

[0009] A set of strip seats are connected by the same peeler, which is located below the end of the moving direction of the container during cleaning, and is used to peel off the cleaned copper foil cloth.

[0010] The flipping component, located on one side of the operating table, is used to flip the copper foil that has been cleaned on the first side by 180° so that the copper foil can be transferred from the first suction cup to the second suction cup.

[0011] A set of replenishment tables is symmetrically arranged and located on the side of the operating table facing the flipping component. The set of replenishment tables corresponds to the recessed section at one end of the strip seat. The top surface of the set of replenishment tables is flush with the top surface of the operating table and is used to replenish the cleanroom cloth sheet upwards.

[0012] The top of one end of the container is vertically provided with a T-shaped rod. The cleaning part also includes a set of pushers. The output end of one pusher is slidably disposed on the top of a corresponding set of strip seats, and the output end of the pusher is slidably connected to the vertical part of the T-shaped rod.

[0013] Furthermore, the lower end of the peeling component is equipped with a collection frame for collecting the peeled-off lint-free cloth pieces.

[0014] Furthermore, the two ends of the first suction cup are connected to the front ends of the two arms of the U-shaped frame, and the two ends of the horizontal part of the U-shaped frame are connected to the operating table through a rotating seat. The flipping component includes a gear installed at one end of the horizontal part of the U-shaped frame. The gear meshes with a rack, the rack slides with the operating table, and one end of the rack is connected to the output end of the first cylinder.

[0015] Furthermore, the pusher includes a support platform located on one side of the corresponding replacement platform. A second cylinder is provided on the support platform, and a C-shaped seat is provided at its output end. The C-shaped seat is slidably connected to the vertical part of the T-shaped rod.

[0016] Furthermore, the bottom of the container is provided with blind holes, which are located at both ends of the strip groove, and one end of the spring is connected to the blind hole.

[0017] Furthermore, a connecting plate is provided on the bottom surface of the horizontal part of the pressure plate, and the connecting plate is parallel to the bottom of the receiving box.

[0018] A method for cleaning copper foil, using the aforementioned copper foil cleaning apparatus for preparing battery negative electrode sheets, includes the following steps:

[0019] S01 Pick up a clean, dust-free cloth:

[0020] Position the rotating sleeve in the recessed section, move the receiving box down to directly above the replenishment platform, and the picking plate picks up both ends of the clean, dust-free cloth sheet.

[0021] S02 Cleaning of the first side of the copper foil:

[0022] The copper foil is placed on the first suction cup, and the receiving box moves from one end of the chute to the other end of the chute. Its movement trajectory covers the first side of the copper foil to complete the cleaning of the first side of the copper foil. After the first side of the copper foil is cleaned, the rotating sleeve continues to drive the receiving box to the end of the other end of the chute. During this process, the peeling part peels the cleaned copper foil cloth off the material picking plate.

[0023] S03 Flip Copper Foil: Use the flipping component to flip the copper foil that has been cleaned on the first side by 180° to the second suction cup that is symmetrically set on the operating table with the first suction cup, and use the second suction cup to fix the copper foil again.

[0024] S04 Cleaning the second side of the copper foil: Use another cleaning component to clean the second side of the copper foil.

[0025] The beneficial effects of this invention are as follows:

[0026] It can automatically clean both sides of the copper foil and set the outlet of the cleaning solution at the front end of the moving direction of the receiving box during the cleaning process. This allows the dust-free cloth at the rear end to clean the copper foil surface after cleaning with the cleaning solution, keeping the copper foil surface dry after cleaning, which is highly efficient. Attached Figure Description

[0027] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of the invention.

[0028] Figure 1 This is a schematic diagram illustrating the overall structure and application scenarios of this application.

[0029] Figure 2 This is a schematic diagram showing the positions of the flipping component and the replacement stage in this application.

[0030] Figure 3This is a schematic diagram of the connection structure between the bar seat and the cleaning assembly in this application.

[0031] Figure 4 This is a schematic diagram showing the rotating sleeve of this application in the recessed section.

[0032] Figure 5 For the purposes of this application Figure 1 A magnified view of part A.

[0033] Figure 6 A schematic diagram of the structure of the container in this application.

[0034] Figure 7 This application provides a schematic diagram of the structure in which the pressure plate and the material handling plate are installed at the bottom of the receiving box.

[0035] Figure 8 A schematic diagram of the structure of the pressure plate in this application.

[0036] The diagram shows the following components: Copper foil-1, operating table-10, first suction cup-11, second suction cup-12, rotating seat-14, U-shaped frame-15, rotating seat-16, cleaning section-20, strip seat-21, chute-211, straight chute section-2111, recessed section-2112, peeling component-213, collection frame-214, cleaning assembly-22, receiving box-221, strip chute-222, pressure plate-2. 23. Connecting plate - 2231. Through groove - 2232. Spring - 224. Seal - 225. Material picking plate - 226. T-shaped rod - 227. Blind hole - 228. Square shaft - 23. Rotating sleeve - 24. Pushing component - 25. Support platform - 251. Second cylinder - 252. C-shaped seat - 253. Tilting assembly - 30. Gear - 31. Rack - 32. First cylinder - 33. Replacement platform - 40. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention will be described in detail below with reference to the accompanying drawings. However, the embodiments described in this invention are only some embodiments of the present invention, and not all embodiments.

[0038] like Figures 1-8 As shown, this embodiment provides a copper foil cleaning device for preparing battery negative electrode sheets. During the preparation of binderless lithium-ion battery graphite negative electrode sheets, the device automatically cleans both sides of the copper foil. The device includes: an operating table 10, a cleaning unit 20, a flipping component 30, and a set of replacement tables 40. The operating table 10 is used to position the copper foil to be cleaned, the cleaning unit 20 is used to clean the copper foil, the flipping component 30 is used to flip the copper foil so that both sides of the copper foil are cleaned, and a set of replacement tables 40 is provided on one side of the operating table 10 for replacing the clean cloth sheet.

[0039] Specifically, such as Figures 1-2 As shown, the top of the operating table 10 is symmetrically provided with a first suction cup 11 and a second suction cup 12. The two ends of the first suction cup 11 are connected by the front ends of the two arms of the U-shaped frame 13. The two ends of the horizontal part of the U-shaped frame 13 are connected to the rotating seat 14 by a rotating shaft, and the connecting shaft of one end extends out of the rotating seat 14 to connect to the flipping assembly 30. The rotating seat 14 is located at the center of the top of the operating table 10 and is symmetrically arranged along the width direction of the operating table 10.

[0040] like Figure 1 , Figure 4 As shown, the cleaning unit 20 includes a set of symmetrically arranged strip seats 21 and a set of cleaning components 22. The strip seats 21 are respectively located at both ends of the operating table 10, and are located outside the first suction cup 11 and the second suction cup 12. A groove 211 is formed on the opposite side of the set of strip seats 21. The groove 211 includes a straight groove section 2111 and a recessed section 2112 at one end of the straight groove section 2111, with the recessed section 2112 facing one end of the flipping component 30. The end of the set of strip seats 21 away from the flipping component 30 is connected to the same peeling member 213, used to peel off the cleaned copper foil lint. The lower end of the peeling member 213 is provided with a collection frame 214 to collect the peeled lint, preventing it from falling to the ground and affecting the operating environment.

[0041] One end of a set of cleaning components 22 is slidably engaged with a corresponding chute 211. The cleaning component 22 includes a container 221 for holding cleaning fluid. The cleaning fluid channel is made of anhydrous ethanol. To facilitate observation of the amount of cleaning fluid in the container 221, the container 221 can be made of transparent rubber. A sealing cap is provided on the top of the container 221 to prevent the cleaning fluid from evaporating and wasting resources.

[0042] like Figure 3 , Figures 6-7 As shown, a strip groove 222 is provided at the bottom of the receiving box 221. The strip groove 222 is arranged along the length of the receiving box 221 and is used to provide a channel for the outflow of cleaning fluid during cleaning. In order to make the copper foil dry quickly after cleaning, the strip groove 222 is located on the side of the receiving box 221 in the direction of movement during cleaning.

[0043] like Figures 7-8As shown, a pressure plate 223 is slidably provided in the strip groove 222, and the pressure plate 223 has an inverted T-shaped structure. Its vertical part is slidably engaged with the strip groove 222, and its horizontal part is located at the bottom of the receiving box 221. Springs 224 are respectively provided at both ends of the horizontal part of the pressure plate 223. Blind holes 228 are symmetrically provided at the bottom of the receiving box 221, and the blind holes 228 are respectively located at both ends of the strip groove 222. The upper end of the spring 224 is connected to the blind hole 228, and the lower end is connected to both ends of the top surface of the horizontal part of the pressure plate 223. The top surface of the vertical part of the pressure plate 223 is provided with a sealing strip 225 of elastic material, such as a rubber strip or silicone strip. Under normal conditions, under the action of spring 224, the horizontal part of pressure plate 223 is at a predetermined distance from the bottom of receiving box 221. At this time, the seal 225 seals the strip groove 222 to block the outflow of cleaning fluid. When the horizontal part of pressure plate 223 is subjected to external force, the horizontal part of pressure plate 223 abuts against the bottom of receiving box 221, spring 224 is accommodated in the corresponding blind hole 228, and the vertical part of pressure plate 223 moves upward. At this time, the seal 225 opens the strip groove 222 upward to provide a channel for the outflow of cleaning fluid.

[0044] The bottom of the receiving box 221 is provided with two picking plates 226 at both ends, and the picking plates 226 are located at both ends of the horizontal part of the pressure plate 223. The picking plates 226 can be adhesive plates, which are used to act on both ends of the cleanroom cloth sheet when picking it up, thereby fixing the cleanroom cloth sheet to the bottom of the picking plate 226. Under normal conditions, the bottom surface of the horizontal part of the pressure plate 223 protrudes downward from the bottom surface of the picking plate 226. When the receiving box 221 moves into the slide 211, the bottom surface of the picking plate 226 is coplanar with the top surface of the first suction cup 11.

[0045] Preferred, such as Figure 8 As shown, in order to wipe away the cleaning fluid remaining on the copper foil surface, a connecting plate 2231 is provided at the bottom of the pressure plate 223. The connecting plate 2231 is parallel to the bottom of the receiving box 221 to increase the contact area between the pressure plate 223 and the lint-free cloth, so that the rear end of the non-woven cloth can better wipe away the cleaning fluid remaining on the copper foil surface. The connecting plate 2231 and the pressure plate 223 are respectively provided on both sides of the connection point for the cleaning fluid to pass through.

[0046] like Figure 1 , Figures 4-5 As shown, the slide 211 has a T-shaped cross-section with its horizontal part arranged vertically. The end of the receiving box 221 facing the slide 211 is connected to the rotating sleeve 24 through the directional shaft 23. The rotating sleeve 24 is in sliding fit with the horizontal part of the slide 211, and the directional shaft 23 is in sliding fit with the vertical part of the slide 211, thereby preventing the receiving box 221 from flipping over during movement.

[0047] The cleaning unit 20 also includes a set of pushers 25, which includes a support platform 251, a second cylinder 252, and a C-shaped seat 253. The support platform 251 is located on the side of the corresponding replacement platform 40 away from the operating platform 10. The second cylinder 252 is located on the top of the support platform 251. The C-shaped seat 253 is located at the output end of the second cylinder 252, and the bottom surface of the horizontal part of the C-shaped seat 253 is slidably connected to the top of the corresponding strip seat 21. The opening of the C-shaped seat 251 is slidably connected to the vertical part of the T-shaped rod 227.

[0048] like Figure 2 As shown, the flipping assembly 30 includes a gear 31, which is mounted on the outer end of the connecting shaft extending from the rotating seat 14. The gear 31 meshes with a rack 32, which is slidably mounted on the operating table 10. One end of the rack 32 is connected to a cylinder 33.

[0049] like Figure 1 As shown, a set of replenishment platforms 40 is located on the outside of the side where the cylinder 33 is installed on one side of the operating table 10. The set of replenishment platforms 40 corresponds to one end of the set of strip seats 21 with a concave section 2112. The top surface of the set of replenishment platforms 40 is flush with the top surface of the operating table 10 and is used to replenish the cleanroom cloth sheet upwards. Each set of replenishment platforms 40 has a vertically provided limiting strip on its outer periphery to limit the periphery of the cleanroom cloth sheet. The topmost cleanroom cloth sheet is flush with the top surface of the limiting strip. The concave section 2112 corresponds to the center line of the length direction of the replenishment platform 40.

[0050] Example 2

[0051] This embodiment provides a method for cleaning copper foil used in the preparation of battery negative electrode sheets. The method utilizes the aforementioned cleaning apparatus to clean both sides of the copper foil, and includes the following steps:

[0052] S01 Pick up a clean, dust-free cloth:

[0053] Position the rotating sleeve 24 in the recessed section 2112, move the receiving box 221 down to directly above the replenishment table 40, and the picking plate 226 picks up both ends of the clean, dust-free cloth sheet.

[0054] S02 Cleaning of the first side of the copper foil:

[0055] The copper foil is placed on the first suction cup 11, causing the receiving box 221 to move from one end of the slide 211 to the other end of the slide 211. Its movement trajectory covers the first side of the copper foil to complete the cleaning of the first side of the copper foil. After the first side of the copper foil is cleaned, the rotating sleeve 24 continues to drive the receiving box 221 to the end of the other end of the slide 211. During this process, the peeling member 213 peels the cleaned copper foil clean cloth off the picking plate 226 to achieve automatic detachment of the clean cloth.

[0056] S03 Flipping Copper Foil: The flipping component 30 is used to flip the copper foil that has been cleaned on the first side by 180° to the second suction cup 12, which is symmetrically arranged on the operating table 10 with the first suction cup 11. The second suction cup 12 is used to fix the copper foil again to avoid the copper foil being contaminated again by residual trace elements on the hands when manually flipping.

[0057] S04 Cleaning the second side of the copper foil: The second side of the copper foil is cleaned using another cleaning component 22. The cleaning method is the same as that for the first side. After cleaning, the copper foil with both sides cleaned can be transferred to the electrode plate using a transfer suction cup to facilitate the next step of the operation.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to be the only or limiting of the invention. Those skilled in the art should understand that various changes or equivalent substitutions made to the present invention without departing from its scope are all within the protection scope of the present invention.

Claims

1. A copper foil cleaning device for preparing battery negative electrode sheets, characterized in that, include: The operating table (10) has a first suction cup (11) and a second suction cup (12) symmetrically arranged on its top surface for fixing the copper foil (1) during cleaning. The cleaning unit (20) includes a set of strip seats (21) symmetrically arranged at both ends of the operating table (10). A groove (211) is provided on the opposite side of the set of strip seats (21). A cleaning component (22) is slidably arranged in each groove (211). The groove (211) includes a straight groove section (2111) and a recessed section (2112) provided at one end of the straight groove section (2111). The cross-section of the groove (211) is T-shaped, and its horizontal part is arranged vertically. The cleaning component (22) includes a container (221) for containing cleaning liquid. A strip groove (222) is provided at the bottom of the container (221) for providing a channel for the cleaning liquid to flow out. A material pick-up plate (226) is provided at both ends of the bottom of the container (221). One end of the container (221) A square shaft (23) is provided, and a rotating sleeve (24) is provided at one end of the square shaft (23). The rotating sleeve (24) is in rolling cooperation with the horizontal part of the slide groove (211), and the square shaft (23) is in sliding cooperation with the vertical part of the slide groove (211). When the rotating sleeve (24) is located in the concave section (2112), the picking plate (226) picks up the clean dust-free cloth. A pressure plate (223) with an inverted T-shaped structure is provided vertically in the strip groove (222). The two ends of the horizontal part of the pressure plate (223) are connected to the bottom of the receiving box (221) through springs (224) respectively, which is used to press the dust-free cloth during cleaning. A sealing strip (225) of elastic material is provided at one end of the vertical part of the pressure plate (223), which is used to seal the strip groove (222) before cleaning or to open the strip groove (222) during cleaning. A set of strip seats (21) are connected by the same peeler (213), and the peeler (213) is located below the end of the moving direction of the receiving box (221) during cleaning, for peeling off the cleaned copper foil cloth sheet; The flipping component (30) is located on one side of the operating table (10) and is used to flip the copper foil that has been cleaned on the first side by 180° so that the copper foil is transferred from the first suction cup (11) to the second suction cup (12). A set of replenishment tables (40) is symmetrically arranged and located on the side of the operating table (10) facing the flipping component (30). The set of replenishment tables (40) corresponds to the recessed section (2112) at one end of the strip seat (21). The top surface of the set of replenishment tables (40) is flush with the top surface of the operating table (10) and is used to replenish the clean cloth sheet upward. The top of one end of the receiving box (221) is vertically provided with a T-shaped rod (228). The cleaning part (20) also includes a set of pushers (25). The output end of the pusher (25) is slidably disposed on the top of the corresponding set of strip seats (21), and the output end of the pusher (25) is slidably connected to the vertical part of the T-shaped rod (228).

2. The copper foil cleaning apparatus for preparing battery negative electrode sheets according to claim 1, characterized in that, The lower end of the peeling component (213) is provided with a collection frame (214) for collecting the peeled clean cloth sheet.

3. The copper foil cleaning apparatus for preparing battery negative electrode sheets according to claim 1, characterized in that, The two ends of the first suction cup (11) are connected to the front ends of the two arms of the U-shaped frame (13). The two ends of the horizontal part of the U-shaped frame (13) are connected to the operating table (10) through the rotating seat (14). The flipping assembly (30) includes a gear (31) installed at one end of the horizontal part of the U-shaped frame (13). The gear (31) meshes with the rack (32). The rack (32) slides with the operating table (10), and one end of the rack (32) is connected to the output end of the first cylinder (33).

4. The copper foil cleaning apparatus for preparing battery negative electrode sheets according to claim 1, characterized in that, The pusher (25) includes a support platform (251) located on one side of the corresponding replacement platform (40). The support platform (251) is provided with a second cylinder (252) and its output end is provided with a C-shaped seat (253). The C-shaped seat (253) is slidably connected to the vertical part of the T-shaped rod (228).

5. The copper foil cleaning apparatus for preparing battery negative electrode sheets according to claim 1, characterized in that, The bottom of the container (221) is provided with blind holes (229), which are located at both ends of the strip groove (222). One end of the spring (224) is connected to the blind hole (229).

6. The copper foil cleaning apparatus for preparing battery negative electrode sheets according to claim 1, characterized in that, The bottom surface of the horizontal part of the pressure plate (223) is provided with a connecting plate (2231). The connecting plate (2231) is parallel to the bottom of the receiving box (221), and the two sides of the connecting plate (2231) are respectively provided with through grooves (2232). The through grooves (2232) penetrate the bottom surface of the connecting plate (2231).

7. A method for cleaning copper foil, using the copper foil cleaning apparatus for preparing battery negative electrode sheets as described in any one of claims 1-6, characterized in that, Includes the following steps: S01 Pick up a clean, dust-free cloth: Position the rotating sleeve (24) in the recessed section (2112), move the receiving box (221) down to directly above the delivery platform (40), and the picking plate (226) picks up both ends of the clean, dust-free cloth sheet; S02 Cleaning of the first side of the copper foil: The copper foil is placed on the first suction cup (11), and the receiving box (221) moves from one end of the slide (211) to the other end of the slide (211). Its movement trajectory covers the first side of the copper foil to complete the cleaning of the first side of the copper foil. After the first side of the copper foil is cleaned, the rotating sleeve (24) continues to drive the receiving box (221) to the end of the other end of the slide (211). During this process, the peeling part (213) peels the cleaned copper foil cloth off the picking plate (226). S03 Flip the copper foil: Use the flipping component (30) to flip the copper foil that has been cleaned on the first side by 180° to the second suction cup (12) which is symmetrically arranged on the operating table (10) with the first suction cup (11), and use the second suction cup (12) to fix the copper foil again; S04 Cleaning the second side of the copper foil: Clean the second side of the copper foil using another cleaning component (22).

Images