A battery current collector coating device and its coating process

Abstract

The application discloses a battery current collector coating device, which comprises a frame, a conversion mechanism, a pole piece, a cylinder, a cylinder rod, a transfer box, a suction pump, a material storage mechanism, a sliding cylinder, a sliding pipe, a guide block, a guide groove, a spring and a spray channel. The frame is provided with the conversion mechanism, the conversion mechanism is provided with the pole piece, the frame is fixedly provided with the cylinder, the cylinder rod of the cylinder is in sliding connection with the frame, the cylinder rod is welded with the transfer box, the transfer box is in contact with the frame, the frame is fixedly provided with the suction pump, the suction pump is connected with the transfer box through a hose, the frame is provided with the material storage mechanism, the sliding cylinder is welded on the transfer box, the sliding pipe is in sliding connection in the sliding cylinder, the spring is arranged in the sliding cylinder, and the sliding pipe is provided with the spray channel at the tail end. The application relates to a battery current collector coating device and a coating process thereof, and has the characteristics that tailing phenomenon is not easy to occur during pole piece coating and the pole piece coating is more uniform.

Description

Technical Field

[0001] This invention belongs to the field of coating device technology, specifically a battery current collector coating device and its coating process. Background Technology

[0002] A battery cell refers to a single electrochemical cell containing positive and negative electrodes, and is generally not used directly. Unlike a battery which includes a protection circuit and casing, a lithium-ion rechargeable battery is composed of a battery cell and a protection circuit board. Removing the protection circuit board from a rechargeable battery leaves the battery cell. The battery cell is the energy storage component of a rechargeable battery, and its quality directly determines the quality of the rechargeable battery. During the battery cell manufacturing process, after the current collector is coated onto the positive and negative electrode plates, incomplete release of the current collector tension during coating can cause irregular tailing phenomena in the current collector. Therefore, improvements to existing technologies are necessary. Summary of the Invention:

[0003] The purpose of this invention is to provide a battery current collector coating device to solve the above-mentioned problems, thereby resolving the issues mentioned in the background art.

[0004] To address the above problems, the present invention provides a technical solution:

[0005] A battery current collector coating device includes a frame, a conversion mechanism, an electrode sheet, a cylinder, a cylinder rod, a transfer box, a suction pump, a storage mechanism, a slide cylinder, a slide tube, a guide block, a guide groove, a spring, and a spray channel. The frame is equipped with the conversion mechanism, and the conversion mechanism is equipped with the electrode sheet. The cylinder is fixedly mounted on the frame, and the cylinder rod is slidably connected to the frame. The transfer box is welded to the cylinder rod and contacts the frame. The suction pump is fixedly mounted on the frame and connected to the transfer box via a flexible hose. The frame is equipped with the storage mechanism. The transfer box is welded to the slide cylinder, and a slide tube is slidably connected inside the slide cylinder. A spring is installed inside the slide cylinder, and a spray channel is provided at the end of the slide tube.

[0006] Preferably, a guide block is welded onto the slide tube, and a guide groove is formed inside the slide cylinder, with the guide block slidably connected within the guide groove. The movement of the slide tube is guided by the cooperation of the guide block and the guide groove.

[0007] Preferably, one end of the spring contacts the slide tube, and the other end of the spring contacts the transfer box. By providing the spring, the slide tube can be easily reset.

[0008] Preferably, the conversion mechanism includes a support, a top plate, a support shaft, a gear ring, a half gear, a motor, a rotating shaft, an elastic rod, a protrusion, a groove, a lead screw, a connecting sleeve, a limiting pin, an annular groove, and a pressure plate. The support is welded to the frame, and the top plate contacts the support. The top plate contacts the electrode. The support shaft is welded to the top plate, and the support shaft and the frame are connected by a bearing. A gear ring is fixedly sleeved on the outer side of the support shaft, and a half gear meshes on the gear ring. The motor is fixedly installed on the frame. An elastic rod is welded to the support, and a protrusion is welded to the elastic rod. A groove is formed on the top plate, and a protrusion is slidably connected within the groove. A lead screw is threaded into the frame, and a connecting sleeve is rotatably connected to the outer side of the lead screw. A pressure plate is welded to the connecting sleeve, and the pressure plate contacts the electrode. When the motor starts, it drives the shaft to rotate, which in turn drives the half gear to rotate. When the half gear rotates to the point where the teeth and the gear ring are in contact, the half gear drives the gear ring to rotate, causing the support shaft to rotate. The support shaft then drives the top plate to rotate, causing the protrusion to disengage from the groove. This causes the elastic rod to deform, and the protrusion to slide on the top plate. When the teeth and the gear ring of the half gear disengage, the protrusion slides to the next groove, and the elastic rod elastically resets, allowing the protrusion to enter the groove and limit the movement of the top plate.

[0009] Preferably, the motor shaft and frame are rotatably connected, and the shaft and half gear are welded together. The half gear drives the gear ring to rotate.

[0010] Preferably, a limiting pin is threaded into the connecting sleeve, and an annular groove is formed on the lead screw, within which the limiting pin is slidably connected. The connecting sleeve and the lead screw are connected by the engagement of the annular groove and the limiting pin.

[0011] Preferably, the material storage mechanism includes a connecting shaft, a placement frame, a paint box, a sealing ring, a cylinder, a top block, a compression spring, and a slot. The connecting shaft is connected to the frame via bearings. The placement frame is welded to the connecting shaft, and the paint box is placed inside the placement frame. The sealing ring contacts the placement frame, and a suction pump is fixedly connected inside the sealing ring. The cylinder is welded to the frame, and a top block is slidably connected inside the cylinder. A compression spring is installed inside the cylinder. A slot is provided on the placement frame, and the top block is slidably connected inside the slot. Manually rotating the placement frame causes it to rotate and slide relative to the sealing ring, resulting in a position change within the placement frame. This misaligns the top block and the slot, compressing the compression spring and causing the top block to slide on the placement frame until it reaches the next slot. The compression spring then resets, causing the top block to return to its original position, thus limiting the placement frame and preventing downtime for paint box replacement. This ensures continuous coating and more uniform coating.

[0012] Preferably, one end of the compression spring is welded to the frame, and the other end of the compression spring contacts the top block. By setting the compression spring, the top block can automatically reset.

[0013] A coating process for a battery current collector coating device includes the following steps:

[0014] Step 1: First, the electrode is coated with nano-ceramic. The coating area can be adjusted according to the length of the electrode. After coating with nano-ceramic, the current collector of the electrode cannot be adsorbed onto the nano-ceramic, but can only be adsorbed along the tangent area of ​​the nano-ceramic coating to avoid the formation of a trailing phenomenon. Place one end of the electrode on the top plate, then hold the electrode and rotate the lead screw. The rotation of the lead screw and the frame make a threaded movement, which causes the lead screw to move into the frame. The movement of the lead screw drives the connecting sleeve to move, and the connecting sleeve drives the pressure plate to move, so that the pressure plate and the electrode come into contact and press the electrode tightly on the top plate.

[0015] Step 2: Start the suction pump. The suction pump will draw the paint from the paint box, allowing the paint to enter the transfer box through the hose. The paint in the transfer box will then enter the slide tube from the slide cylinder and be sprayed out from the spray channel to coat the electrode.

[0016] Step 3: Start the cylinder. The cylinder rod extends and retracts, which moves the transfer box, which in turn moves the slide cylinder, which in turn moves the slide tube, which in turn moves the spray channel, so that the spray channel can evenly coat the surface of the electrode sheet.

[0017] Step 4: After coating one side of the electrode, the motor is started to drive the rotating shaft to rotate. The rotating shaft drives the half gear to rotate. When the half gear rotates to the point where the teeth and the toothed ring are in contact, the half gear drives the toothed ring to rotate, causing the support shaft to rotate. The support shaft drives the top plate to rotate, causing the protrusion to disengage from the groove, causing the elastic rod to deform. The protrusion slides on the top plate. When the teeth and the toothed ring of the half gear disengage, the protrusion slides to the next groove. The elastic rod elastically resets, allowing the protrusion to enter the groove and limit the top plate.

[0018] Step 4: The top plate rotates, causing the electrode to rotate. The rotating electrode contacts the spray channel on its side, pushing the spray channel and the slide tube to slide into the slide cylinder, which compresses the spring. When the electrode has finished flipping, the spring returns to its original position, causing the spray channel to return to its original position. This process is repeated multiple times to flip and spray the electrode, thereby making its surface evenly coated and maintaining a certain thickness of coating.

[0019] Step 5: When the paint in the paint box is used up, manually rotate the placement frame. The rotation of the placement frame and the relative sliding of the sealing ring will cause the placement frame to switch positions, causing the top block and the slot to misalign. This will compress the spring and allow the top block to slide on the placement frame until it reaches the next slot. The spring will then reset, causing the top block to return to its original position. This will limit the placement frame, preventing downtime for paint box replacement, ensuring continuous coating, and making the coating more uniform.

[0020] The beneficial effects of this invention are as follows: This invention relates to a battery current collector coating device and its coating process, which has the characteristics of less tailing phenomenon in electrode coating and more uniform electrode coating, and has the following beneficial effects:

[0021] First, by setting up structures such as a gear ring, half gear, motor, rotating shaft, elastic rod, protrusion, and groove, the motor drives the half gear to rotate and cooperate with the gear ring, causing the top plate to rotate and the electrode to flip and be coated. The electrode is flipped and sprayed multiple times, so that its surface is coated evenly and the coating can maintain a certain thickness and avoid the tailing phenomenon caused by fluid tension.

[0022] Secondly, by setting up structures such as connecting shaft, placement frame, paint box, sealing ring, cylinder, top block, compression spring, and slot, when the paint in the paint box is used up, rotating the placement frame causes the paint box to switch positions, and the top block and slot cooperate to limit and control the placement frame, ensuring the continuity of coating and making the coating more uniform. Attached image description:

[0023] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0024] Figure 1 This is a perspective view of the overall structure of the present invention;

[0025] Figure 2 For the present invention Figure 1 A front sectional view;

[0026] Figure 3 For the present invention Figure 2 Sectional view of the sliding cylinder in the middle;

[0027] Figure 4 For the present invention Figure 2 Enlarged view of point A in the image;

[0028] Figure 5 For the present invention Figure 2 Enlarged view of point B in the image;

[0029] Figure 6 For the present invention Figure 2 Enlarged view of point C in the image;

[0030] Figure 7 For the present invention Figure 2 Schematic diagram of the electrode in the middle Figure 1 ;

[0031] Figure 8 For the present invention Figure 2 Schematic diagram of the electrode in the middle Figure 2 .

[0032] In the diagram: 1. Frame; 2. Conversion mechanism; 21. Support; 22. Top plate; 23. Support shaft; 24. Gear ring; 25. Half gear; 26. Motor; 27. Rotating shaft; 29. ​​Elastic rod; 210. Protrusion; 211. Groove; 212. Lead screw; 213. Connecting sleeve; 214. Limit pin; 215. Ring groove; 216. Pressure plate; 3. Electrode; 4. Cylinder; 5. Cylinder rod; 6. Transfer box; 7. Suction pump; 8. Material storage mechanism; 81. Connecting shaft; 82. Placement frame; 83. Paint box; 84. Sealing ring; 85. Cylinder body; 86. Top block; 87. Compression spring; 88. Slot; 9. Slide cylinder; 10. Slide tube; 11. Guide block; 12. Guide groove; 13. Spring; 14. Spray channel. Detailed implementation method:

[0033] like Figure 1-8 As shown, the specific implementation adopts the following technical solution:

[0034] Example:

[0035] A battery current collector coating device includes a frame 1, a conversion mechanism 2, an electrode 3, a cylinder 4, a cylinder rod 5, a transfer box 6, a suction pump 7, a storage mechanism 8, a slide cylinder 9, a slide tube 10, a guide block 11, a guide groove 12, a spring 13, and a spray channel 14. The conversion mechanism 2 is provided on the frame 1, and the electrode 3 is provided on the conversion mechanism 2. The cylinder 4 is fixedly installed on the frame 1, and the cylinder rod 5 of the cylinder 4 is slidably connected to the frame 1. The transfer box 6 is welded to the cylinder rod 5 and is in contact with the frame 1. The suction pump 7 is fixedly installed on the frame 1 and is connected to the transfer box 6 through a hose. The storage mechanism 8 is provided on the frame 1, and the slide cylinder 9 is welded to the transfer box 6. The slide tube 10 is slidably connected inside the slide cylinder 9, and the spring 13 is provided inside the slide cylinder 9. The end of the slide tube 10 is provided with a spray channel 14.

[0036] The slide tube 10 is welded with a guide block 11, and the slide cylinder 9 has a guide groove 12, in which the guide block 11 is slidably connected. The guide block 11 and the guide groove 12 cooperate to guide the movement of the slide tube 10.

[0037] One end of the spring 13 contacts the slide tube 10, and the other end of the spring 13 contacts the transfer box 6. By setting the spring 13, the slide tube 10 can be easily reset.

[0038] The conversion mechanism 2 includes a support 21, a top plate 22, a support shaft 23, a gear ring 24, a half gear 25, a motor 26, a rotating shaft 27, an elastic rod 29, a protrusion 210, a groove 211, a lead screw 212, a connecting sleeve 213, a limiting pin 214, an annular groove 215, and a pressure plate 216. The support 21 is welded to the frame 1, and the top plate 22 contacts the support 21. The top plate 22 contacts the electrode 3. The support shaft 23 is welded to the top plate 22, and the support shaft 23 is connected to the frame 1 via a bearing. The outer surface of the support shaft 23... A toothed ring 24 is fixedly sleeved on the side, and a half gear 25 meshes on the toothed ring 24. A motor 26 is fixedly installed on the frame 1. An elastic rod 29 is welded on the support 21, and a protrusion 210 is welded on the elastic rod 29. A groove 211 is opened on the top plate 22, and the protrusion 210 is slidably connected in the groove 211. A lead screw 212 is threadedly connected in the frame 1, and a connecting sleeve 213 is rotatably connected to the outside of the lead screw 212. A pressure plate 216 is welded on the connecting sleeve 213, and the pressure plate 216 contacts the electrode 3. When the motor 26 starts, it drives the rotating shaft 27 to rotate. The rotating shaft 27 drives the half gear 25 to rotate. When the half gear 25 rotates to the point where the teeth and the toothed ring 24 are in contact, the half gear 25 drives the toothed ring 24 to rotate, causing the support shaft 23 to rotate. The support shaft 23 drives the top plate 22 to rotate, causing the protrusion 210 to disengage from the groove 211, causing the elastic rod 29 to deform. The protrusion 210 slides on the top plate 22. When the teeth of the half gear 25 disengage from the toothed ring 24, the protrusion 210 slides to the next groove 211, and the elastic rod 29 elastically resets, allowing the protrusion 210 to enter the groove 211 and limit the top plate 22.

[0039] The motor 26 has a rotating shaft 27 rotatably connected to the frame 1, and the rotating shaft 27 is welded to the half gear 25. The half gear 25 drives the gear ring 24 to rotate.

[0040] The connecting sleeve 213 is threadedly connected to a limiting pin 214, and the lead screw 212 has an annular groove 215, within which the limiting pin 214 is slidably connected. The connecting sleeve 213 and the lead screw 212 are connected by the cooperation of the annular groove 215 and the limiting pin 214.

[0041] The material storage mechanism 8 includes a connecting shaft 81, a placement frame 82, a paint box 83, a sealing ring 84, a cylinder 85, a top block 86, a compression spring 87, and a slot 88. The connecting shaft 81 is connected to the frame 1 via bearings. The placement frame 82 is welded to the connecting shaft 81. The paint box 83 is placed inside the placement frame 82. The sealing ring 84 is in contact with the placement frame 82. A suction pump 7 is fixedly connected inside the sealing ring 84. The cylinder 85 is welded to the frame 1. The top block 86 is slidably connected inside the cylinder 85. The compression spring 87 is provided inside the cylinder 85. The slot 88 is provided on the placement frame 82. The top block 86 is slidably connected inside the slot 88. Manually rotating the placement frame 82 causes it to rotate relative to the sealing ring 84, resulting in a workstation change within the placement frame 82. This causes the top block 86 and the slot 88 to misalign, compressing the spring 87 and allowing the top block 86 to slide on the placement frame 82 until it reaches the next slot 88. The spring 87 then resets, returning the top block 86 to its original position. This limits the placement frame 82, preventing downtime for paint box 83 replacement, ensuring continuous coating and resulting in more uniform coating.

[0042] One end of the compression spring 87 is welded to the frame 1, and the other end of the compression spring 87 contacts the top block 86. By setting the compression spring 87, the top block 86 can automatically reset.

[0043] A coating process for a battery current collector coating device includes the following steps:

[0044] Step 1: First, the electrode 3 is coated with nano-ceramic. The coating area can be adjusted according to the length of the electrode 3. After the nano-ceramic is coated, the current collector of the electrode 3 cannot be adsorbed onto the nano-ceramic. It can only be adsorbed along the tangent area of ​​the nano-ceramic coating to avoid the formation of a trailing phenomenon. Place one end of the electrode 3 on the top plate 22, then hold the electrode 3 and rotate the lead screw 212. The lead screw 212 rotates and makes a threaded movement with the frame 1, thereby causing the lead screw 212 to move into the frame 1. The movement of the lead screw 212 drives the connecting sleeve 213 to move. The connecting sleeve 213 drives the pressure plate 216 to move, so that the pressure plate 216 contacts the electrode 3 and presses the electrode 3 tightly onto the top plate 22.

[0045] Step 2: Start the suction pump 7. The suction pump 7 starts to draw the paint in the paint box 83, so that the paint enters the transfer box 6 through the hose. The paint in the transfer box 6 enters the slide tube 10 from the slide cylinder 9 and is sprayed out from the spray channel 14 to coat the electrode 3.

[0046] Step 3: Start cylinder 4. Cylinder 4 starts cylinder rod 5 to extend and retract. Cylinder rod 5 drives transfer box 6 to move. Transfer box 6 drives slide cylinder 9 to move. Slide cylinder 9 drives slide tube 10 to move. Slide tube 10 drives spray channel 14 to move, so that spray channel 14 uniformly coats the surface of electrode sheet 3.

[0047] Step 4: After coating is completed on one side of electrode 3, motor 26 starts to drive shaft 27 to rotate. Shaft 27 drives half gear 25 to rotate. When half gear 25 rotates to contact toothed ring 24, half gear 25 drives toothed ring 24 to rotate, causing support shaft 23 to rotate. Support shaft 23 drives top plate 22 to rotate, causing protrusion 210 to disengage from groove 211, causing elastic rod 29 to deform. Protrusion 210 slides on top plate 22. When half gear 25 disengages from toothed ring 24, protrusion 210 slides to the next groove 211. Elastic rod 29 elastically resets, causing protrusion 210 to enter groove 211 and limit top plate 22.

[0048] Step 4: The top plate 22 rotates, causing the electrode 3 to rotate. The side of the electrode 3 rotates and contacts the spray channel 14, pushing the spray channel 14 to slide the slide tube 10 into the slide cylinder 9, so that the spring 13 is compressed. When the electrode 3 has finished flipping, the spring 13 returns to its original position, causing the spray channel 14 to return to its original position. This process is repeated multiple times to flip and spray the electrode 3, so that its surface is evenly coated and the coating can maintain a certain thickness.

[0049] Step 5: When the paint in paint box 83 is used up, manually rotate the placement frame 82. The rotation of placement frame 82 and relative sliding of sealing ring 84 cause the placement frame 82 to change position, causing the top block 86 and the slot 88 to misalign. This compresses the compression spring 87, causing the top block 86 to slide on the placement frame 82 until it slides to the next slot 88. The compression spring 87 then resets, causing the top block 86 to reset, thus limiting the placement frame 82. This avoids stopping the machine to replace paint box 83, ensuring the continuity of coating and making the coating more uniform.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A battery current collector coating device, comprising a frame (1), a conversion mechanism (2), an electrode piece (3), a gas cylinder (4), a gas cylinder rod (5), a transfer box (6), a suction pump (7), a storage mechanism (8), a sliding cylinder (9), a sliding pipe (10), a guide block (11), a guide groove (12), a spring (13) and a spray channel (14), characterized in that: The frame (1) is provided with a conversion mechanism (2), the conversion mechanism (2) is provided with a pole piece (3), the frame (1) is fixedly installed with a cylinder (4), the cylinder rod (5) of the cylinder (4) and the frame (1) are slidably connected, the cylinder rod (5) is welded with a transfer box (6), the transfer box (6) and the frame (1) are in contact, the frame (1) is fixedly installed with a suction pump (7), the suction pump (7) and the transfer box (6) are connected through a hose, the frame (1) is provided with a material storage mechanism (8), the transfer box (6) is welded with a sliding cylinder (9), the sliding cylinder (9) is slidably connected with a sliding pipe (10), the sliding cylinder (9) is provided with a spring (13), the end of the sliding pipe (10) is provided with a spray channel (14); The conversion mechanism (2) includes a support (21), a top plate (22), a support shaft (23), a gear ring (24), a half gear (25), a motor (26), a rotating shaft (27), an elastic rod (29), a protrusion (210), a groove (211), a lead screw (212), a connecting sleeve (213), a limiting pin (214), a ring groove (215) and a pressing plate (216), the frame (1) is welded with a support (21), the support (21) is in contact with a top plate (22), the top plate (22) is in contact with a pole piece (3), the top plate (22) is welded with a support shaft (23), the support shaft (23) is connected with the frame (1) through a bearing, the outer side of the support shaft (23) is fixedly sleeved with a gear ring (24), the gear ring (24) is engaged with a half gear (25), the frame (1) is fixedly installed with a motor (26), the support (21) is welded with an elastic rod (29), the elastic rod (29) is welded with a protrusion (210), the top plate (22) is provided with a groove (211), the groove (211) is slidably connected with a protrusion (210), the frame (1) is threadedly connected with a lead screw (212), the outer side of the lead screw (212) is rotatably connected with a connecting sleeve (213), the connecting sleeve (213) is welded with a pressing plate (216), the pressing plate (216) is in contact with the pole piece (3); The material storage mechanism (8) includes a connecting shaft (81), a placing frame (82), a paint box (83), a sealing ring (84), a cylinder body (85), a top block (86), a compression spring (87) and a clamping groove (88), the frame (1) is connected with a connecting shaft (81) through a bearing, the connecting shaft (81) is welded with a placing frame (82), the placing frame (82) is placed with a paint box (83), the placing frame (82) is in contact with a sealing ring (84), the sealing ring (84) is fixedly connected with a suction pump (7), the frame (1) is welded with a cylinder body (85), the cylinder body (85) is slidably connected with a top block (86), the cylinder body (85) is provided with a compression spring (87), the placing frame (82) is provided with a clamping groove (88), the clamping groove (88) is slidably connected with a top block (86).

2. A battery current collector coating apparatus according to claim 1, wherein: The sliding pipe (10) is welded with a guide block (11), the sliding cylinder (9) is provided with a guide groove (12), and the guide groove (12) is slidably connected with the guide block (11).

3. A battery current collector coating apparatus according to claim 1, wherein: One end of the spring (13) is in contact with the sliding pipe (10), and the other end of the spring (13) is in contact with the transfer box (6).

4. The battery current collector coating apparatus of claim 1, wherein: The rotating shaft (27) of the motor (26) is rotatably connected with the frame (1), and the rotating shaft (27) is welded with the half gear (25).

5. The battery current collector coating apparatus of claim 1, wherein: The connecting sleeve (213) is threadedly connected with a limiting pin (214), the lead screw (212) is provided with a ring groove (215), and the ring groove (215) is slidably connected with the limiting pin (214).

6. A battery current collector coating apparatus according to claim 1, wherein: One end of the compression spring (87) is welded with the frame (1), and the other end of the compression spring (87) is in contact with the top block (86).

7. A coating process for a battery current collector coating apparatus according to any one of claims 1-6, characterized in that: The specific steps include: The specific steps include: Step one, first, the pole piece (3) is coated with nano ceramic, the coating area can be adjusted according to the length of the pole piece (3), after coating nano ceramic, the pole piece (3) current collector cannot be absorbed on the nano ceramic, only along the tangent area of the nano ceramic coating can be absorbed, to avoid the formation of tailing phenomenon, one end of the pole piece (3) is placed on the top plate (22), then hold the pole piece (3), rotate the lead screw (212), the lead screw (212) rotates and the frame (1) does screw thread movement, and then the lead screw (212) moves to the frame (1), the lead screw (212) moves to drive the connecting sleeve (213) to move, the connecting sleeve (213) drives the pressing plate (216) to move, so that the pressing plate (216) is in contact with the pole piece (3), and the pole piece (3) is pressed on the top plate (22); Step two, start the suction pump (7), the suction pump (7) starts to suck the paint in the paint suction box (83), so that the paint enters the transfer box (6) through the hose, the paint in the transfer box (6) enters the sliding pipe (10) from the sliding cylinder (9) and is sprayed from the spray channel (14), and the pole piece (3) is coated; Step three, start the air cylinder (4), the air cylinder (4) drives the air cylinder rod (5) to extend and retract, the air cylinder rod (5) drives the transfer box (6) to move, the transfer box (6) drives the sliding cylinder (9) to move, the sliding cylinder (9) drives the sliding pipe (10) to move, and the sliding pipe (10) drives the spray channel (14) to move, so that the spray channel (14) uniformly coats the surface of the pole piece (3); Step four, after the coating on one side of the pole piece (3) is completed, the motor (26) drives the rotating shaft (27) to rotate, the rotating shaft (27) drives the half gear (25) to rotate, when the half gear (25) is in contact with the gear ring (24), the half gear (25) drives the gear ring (24) to rotate, so that the supporting shaft (23) rotates, the supporting shaft (23) drives the top plate (22) to rotate, so that the convex block (210) and the concave groove (211) are separated, the elastic rod (29) is deformed, the convex block (210) slides on the top plate (22), when the half gear (25) is separated from the gear ring (24), the convex block (210) slides to the next concave groove (211), the elastic rod (29) is elastically reset, so that the convex block (210) is located in the concave groove (211), and the top plate (22) is limited; Step four, the top plate (22) rotates to drive the pole piece (3) to rotate, the pole piece (3) rotates its side and the spray channel (14) to contact, push the spray channel (14) to drive the sliding pipe (10) to slide into the sliding cylinder (9), so that the spring (13) is compressed, when the pole piece (3) completes the turnover, the spring (13) resets to make the spray channel (14) reset, and the process is repeated, so that the pole piece (3) is turned over and sprayed multiple times, so that the surface is coated uniformly and the coating can maintain a certain thickness; Step five, when the paint in the paint box (83) is used up, manually rotate the placement frame (82), the placement frame (82) rotates and the sealing ring (84) slides relatively, drives the placement frame (82) to change the station, so that the top block (86) and the clamping groove (88) are out of position, the compression spring (87) is compressed, the top block (86) slides on the placement frame (82), until the top block (86) slides to the next clamping groove (88), the compression spring (87) resets to make the top block (86) reset, so that the placement frame (82) is limited, avoiding downtime to replace the paint box (83), ensuring the continuity of coating, making the coating more uniform.

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