Coating production line and battery production system

Abstract

The utility model relates to the technical field of lithium battery production equipment, in particular to a coating production line and a battery production system. The utility model provides a coating production line, which is used for coating the surface of a current collector and comprises a first coating device, a second coating device and a conveying device, the conveying device is used for conveying the current collector, and the first coating device and the second coating device are arranged at an interval in the conveying direction of the current collector; the first coating device is used for coating the upper surface of the current collector, and the second coating device is used for coating the lower surface of the current collector. Through cooperation of the first coating device, the second coating device and the conveying device, the upper surface and the lower surface of the current collector can be coated at the same time, compared with the prior art, the pole piece production efficiency is higher, the first coating device and the second coating device are integrated into the same production line, the occupied space is smaller, the cost is lower, and control is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production equipment, and in particular to a coating production line and a battery production system. Background Art

[0002] Lithium batteries include a diaphragm and pole pieces on both sides of the diaphragm. The pole piece consists of a current collector and a separate coating layer on both sides of the current collector. During the production of the pole piece, a powder coating layer needs to be applied on both sides of the current collector.

[0003] In the prior art, two independent die heads are generally provided for coating the upper and lower surfaces of the current collector, and the coating on both sides is located in different areas. Specifically, one side of the current collector is first coated with a die head, and then the coated current collector is transported to an oven for drying, and then the other side of the current collector is coated with another die head after drying.

[0004] Although the above method can produce electrodes, it requires two drying steps, resulting in low production efficiency and high energy consumption. In addition, the production process requires the cooperation of multiple equipment and multiple operators, the production system occupies a large space, has high labor costs, and the overall system control is complex. Utility Model Content

[0005] (I) The problem to be solved by the present invention is that the existing electrode production system has the problems of low production efficiency, high energy consumption, large space occupation, high cost and complex system control.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, an embodiment of the utility model provides a coating production line for coating the surface of a current collector, wherein the coating production line comprises a first coating device, a second coating device and a conveying device;

[0008] The conveying device is used to convey the current collector, and along the conveying direction of the current collector, the first coating device and the second coating device are arranged at intervals;

[0009] The first coating device is used to coat the upper surface of the current collector, and the second coating device is used to coat the lower surface of the current collector.

[0010] Further, the first coating device includes a first die head and an adjustment mechanism;

[0011] The first die head is arranged on the adjustment mechanism;

[0012] The adjusting mechanism is used to adjust the distance between the first die head and the current collector, and / or, the adjusting mechanism is used to make the first die head slide out of the coating production line.

[0013] Further, the adjustment mechanism includes a first spacing adjustment component and a first side sliding component;

[0014] The first side-sliding component is arranged on the first spacing adjustment component, and the first die head is arranged on the first side-sliding component;

[0015] The first spacing adjustment component is used to adjust the spacing between the first die head and the current collector, and the first side sliding component is used to make the first die head slide out from the side of the coating production line.

[0016] Further, the second coating device includes a second die head, and at least one of a kiss coating mechanism and a second side sliding assembly;

[0017] The kiss coating mechanism is used to enable the second die head to kiss coat the lower surface of the current collector, and the second side sliding assembly is used to enable the second die head to slide out of the coating production line from the side of the coating production line.

[0018] Further, the second coating device includes a kiss coating mechanism and a second side sliding component;

[0019] The kiss coating mechanism includes a second spacing adjustment component and an angle adjustment component;

[0020] The second die head is arranged on the angle adjustment component, the angle adjustment component is arranged on the second side sliding component, and the second side sliding component is arranged on the second spacing adjustment component;

[0021] The angle adjustment assembly is used to adjust the angle of the second die head, the second spacing adjustment assembly is used to adjust the spacing between the second die head and the current collector, and the second side sliding assembly is used to make the second die head slide out from the side of the coating production line.

[0022] Furthermore, the second spacing adjustment assembly includes a second telescopic member and a second supporting member;

[0023] The second side sliding assembly is arranged on the second supporting member, and the second telescopic member is connected to the second supporting member and drives the second supporting member to move toward or away from the current collector.

[0024] Further, the angle adjustment assembly includes a rotary drive member and a rotary mounting member;

[0025] The rotary mounting member is rotatably mounted on the second side sliding assembly, the second die head is fixedly mounted on the rotary mounting member, and the rotary driving member is transmission-connected with the rotary mounting member and drives the rotary mounting member to rotate.

[0026] Further, the kiss coating mechanism includes a support assembly;

[0027] The support assembly is adjustably disposed on the second die head and is used to support the current collector.

[0028] Furthermore, it also includes a deviation correction mechanism, which is used to correct the deviation of the current collector;

[0029] and / or;

[0030] It also includes a detection mechanism, which is used to detect the thickness of the current collector and the thickness of the current collector after being coated by the first coating device and the second coating device.

[0031] Another aspect of the present invention is to provide a battery production system, including the coating production line described in any of the above embodiments;

[0032] The current collector is divided into a positive electrode current collector and a negative electrode current collector; two coating production lines are provided, one of which is used to coat the positive electrode current collector, and the other coating production line is used to coat the negative electrode current collector, and the two coating production lines are stacked up and down.

[0033] Beneficial effects of the utility model:

[0034] The utility model provides a coating production line for coating the surface of a current collector, and the coating production line comprises: a first coating device, a second coating device and a conveying device; the conveying device is used to convey the current collector, and along the conveying direction of the current collector, the first coating device and the second coating device are arranged at intervals; the first coating device is used to coat the upper surface of the current collector, and the second coating device is used to coat the lower surface of the current collector.

[0035] Through the cooperation of the first coating device, the second coating device and the conveying device, the upper and lower surfaces of the current collector can be coated at the same time. Compared with the existing technology, the pole piece production efficiency is higher, and the first coating device and the second coating device are integrated into the same production line, which occupies less space, has lower costs, and is more convenient to control. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of the structure of a battery production system provided by an embodiment of the utility model;

[0038] Figure 2 A schematic structural diagram of a first coating device provided in an embodiment of the utility model;

[0039] Figure 3 A schematic diagram of the structure of a first spacing adjustment component provided in an embodiment of the utility model;

[0040] Figure 4 A schematic structural diagram of a first side-sliding assembly provided in an embodiment of the utility model;

[0041] Figure 5 A schematic diagram of the structure of a second coating device provided in an embodiment of the utility model;

[0042] Figure 6 A schematic structural diagram of a second side-sliding assembly provided in an embodiment of the utility model.

[0043] Icons: 1-first coating device; 11-first die head; 12-adjusting mechanism; 121-first spacing adjustment assembly; 1211-first support member; 1212-first telescopic member; 1213-first rolling wedge block; 1214-first fixed wedge block; 122-first side sliding assembly; 1221-first mounting member; 1222-first screw rod; 1223-first screw rod nut; 1224-first driving member; 1225-first slide rail; 1226-first slider;

[0044] 2-second coating device; 21-second die head; 22-kiss coating mechanism; 221-second spacing adjustment assembly; 2211-second telescopic member; 2212-second support member; 222-angle adjustment assembly; 2221-rotation drive member; 2222-rotation mounting member; 23-second side sliding assembly; 231-second mounting member; 232-second screw rod; 233-second screw rod nut; 234-second drive member; 235-second slide rail; 236-second slider; 24-support assembly; 241-support roller; 242-first support seat; 243-small roller motor; 244-differential head; 251-stabilizing roller; 252-second support seat;

[0045] 3-Correction mechanism;

[0046] 41-first detection component; 42-second detection component; 43-third detection component;

[0047] 5-frame; 51-die head support. DETAILED DESCRIPTION

[0048] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0049] like Figures 1 to 6 As shown, an embodiment of the utility model provides a coating production line for coating the surface of a current collector, the coating production line comprising a first coating device 1, a second coating device 2 and a conveying device; the conveying device is used to convey the current collector, and along the conveying direction of the current collector, the first coating device 1 and the second coating device 2 are arranged at intervals; the first coating device 1 is used to coat the upper surface of the current collector, and the second coating device 2 is used to coat the lower surface of the current collector.

[0050] The coating production line provided in this embodiment is used to coat the surface of the current collector to obtain a pole piece. The current collector has a relative upper surface and a lower surface, and the coating production line can coat the upper surface and the lower surface of the current collector at the same time. Specifically, the coating production line includes a first coating device 1, a second coating device 2 and a conveying device. The conveying device is used to convey the current collector so that the current collector can pass through the first coating device 1 and the second coating device 2. Along the conveying direction of the conveying device to the current collector, the first coating device 1 and the second coating device 2 are arranged at intervals, wherein the first coating device 1 can be in front and the second coating device 2 can be in the back along the conveying direction of the conveying device to the current collector, or the second coating device 2 can be in front and the first coating device 1 can be in the back. Since the first coating device 1 is used to coat the upper surface of the current collector, it is preferred that the first coating device 1 is in front and the second coating device 2 is in the back, so that after the current collector is coated by the first coating device 1, the subsequent conveying device only contacts the lower surface of the current collector. The conveying device is a plurality of conveying rollers arranged at intervals, which is a common device for conveying strip materials, so it will not be described in detail here.

[0051] The coating production line provided in this embodiment can coat the upper and lower surfaces of the current collector at the same time through the cooperation of the first coating device 1, the second coating device 2 and the conveying device. Compared with the prior art, the electrode production efficiency is higher, and the first coating device 1 and the second coating device 2 are integrated into the same production line, so that it occupies less space, has lower cost, and is more convenient to control.

[0052] The coating production line provided by the embodiment of the utility model is as follows: Figures 1 to 4 As shown, the first coating device 1 includes a first die head 11 and an adjusting mechanism 12; the first die head 11 is arranged on the adjusting mechanism 12; the adjusting mechanism 12 is used to adjust the distance between the first die head 11 and the current collector, and / or, the adjusting mechanism 12 is used to make the first die head 11 slide out of the coating production line.

[0053] In this embodiment, the first coating device 1 includes a first die head 11 and an adjustment mechanism 12. The first die head 11 is used to coat the upper surface of the current collector, and the first die head 11 is arranged on the adjustment mechanism 12. The adjustment mechanism 12 is used to adjust the position of the first die head 11. Optionally, the adjustment mechanism 12 can be used to adjust the distance between the first die head 11 and the current collector, so as to control the coating quality and improve the performance of the obtained electrode piece. The adjustment mechanism 12 can also be used to enable the first die head 11 to slide out of the coating production line, so as to facilitate the operator to inspect or maintain the first die head 11. The adjustment mechanism 12 can also have the above two functions.

[0054] It should be noted that the battery production system includes a rack 5, and the first die head 11 and the second die head 21 are both located in the rack 5. When the operator inspects or maintains the first die head 11 and the second die head 21, it is necessary to enter the rack 5. The small space in the rack 5 makes inspection and maintenance very inconvenient, and the operator is easily injured by bumps. When the first die head 11 and the second die head 21 can slide out of the coating production line, that is, slide out of the rack 5, it can solve the problem of difficulty in inspection and maintenance due to the small space in the rack 5, and the operator is easily injured by bumps.

[0055] The coating production line provided by the embodiment of the utility model is as follows: Figures 1 to 4 As shown, the adjustment mechanism 12 includes a first spacing adjustment component 121 and a first side sliding component 122; the first side sliding component 122 is arranged on the first spacing adjustment component 121, and the first die head 11 is arranged on the first side sliding component 122; the first spacing adjustment component 121 is used to adjust the spacing between the first die head 11 and the current collector, and the first side sliding component 122 is used to make the first die head 11 slide out from the side of the coating production line.

[0056] Preferably, in this embodiment, the adjustment mechanism 12 can adjust the distance between the first die head 11 and the current collector, and can also enable the first die head 11 to slide out from the coating production line. Specifically, the adjustment mechanism 12 includes a first spacing adjustment component 121 and a first side sliding component 122. Since the maintenance frequency of the first spacing adjustment component 121 is low, the first side sliding component 122 is arranged on the first spacing adjustment component 121, and the first die head 11 is arranged on the first side sliding component 122. When in use, it is only necessary to enable the first die head 11 to slide out from the side of the coating production line through the first side sliding component 122.

[0057] It should be noted that the first die head 11 slides out from the side of the coating production line, i.e., both sides of the collector conveying direction, and its height is suitable, which can make it more convenient for operators to inspect and maintain the first die head 11.

[0058] In this embodiment, the first side sliding assembly 122 includes a first mounting member 1221, a first transmission assembly and a first driving member 1224. The first mounting member 1221 is used to mount the first die head 11, and the first die head 11 can be mounted on the first mounting member 1221 by means of structures such as bolts, screws, rivets or pins. The first mounting member 1221 is slidably mounted on the first spacing adjustment assembly 121. The first driving member 1224 is transmission-connected to the first mounting member 1221 through the first transmission assembly, and drives the first mounting member 1221 to slide on the first spacing adjustment assembly 121, thereby driving the coating die head to slide out from the side of the coating production line.

[0059] Further, in the present embodiment, the first spacing adjustment component 121 includes a first support member 1211, and the first support member 1211 is preferably a first support plate, which has a larger bearing surface, so that the first die head 11 is more stable. Alternatively, the first support member 1211 can also be a frame structure. The first mounting member 1221 is a first mounting plate, which also has a larger bearing surface. Alternatively, the first mounting member 1221 can also be a frame structure. The first mounting member 1221 and the first support member 1211 are arranged in parallel, and the first die head 11 is arranged on the side of the first mounting member 1221 away from the first support member 1211, and the first slide rail 1225 is fixedly arranged on the side of the second mounting member 231 facing the first support member 1211, and the first slider 1226 is fixedly arranged on the side of the first support member 1211 facing the second mounting member 231, and the first slider 1226 matches the first slide rail 1225. The first transmission component includes a first screw rod 1222 and a first screw rod nut 1223. The first screw rod 1222 is rotatably mounted on a side of the first mounting member 1221 facing the first support member 1211 through a mounting seat, and the first screw rod nut 1223 is fixedly mounted on a side of the first support member 1211 facing the first mounting member 1221 .

[0060] The first driving member 1224 is a first motor, and the first driving member 1224 is in transmission connection with the first screw rod 1222. When in use, the first driving member 1224 drives the first screw rod 1222 to rotate, so that the first mounting member 1221 can slide, and then drive the first die head 11 to slide out from the side of the coating production line.

[0061] Optionally, in this embodiment, the first mounting member 1221 may also be a frame structure, and the first driving member 1224 may also be a telescopic cylinder of an air cylinder, an oil cylinder or an electric cylinder. The first transmission assembly may also be a gear rack, or a sprocket chain, etc.

[0062] In this embodiment, the first spacing adjustment component 121 includes a first telescopic member 1212, a first support member 1211, a first rolling wedge 1213 and a first fixed wedge 1214. The first support member 1211 is slidably installed on the frame 5 of the battery production system through the slide rail and the slider, and the first telescopic member 1212 can be any one of an oil cylinder, an air cylinder or an electric cylinder. The cylinder end of the first telescopic member 1212 is fixed on the frame 5 of the battery production system, and the piston end is fixed with a first rolling wedge 1213; the first fixed wedge 1214 is fixed on the first support member 1211, and the first rolling wedge 1213 and the first fixed wedge 1214 are against each other. When in use, the first telescopic member 1212 drives the first rolling wedge 1213 to move, so that the first support member 1211 can slide slightly, thereby realizing precise control of the distance between the lip of the first die head 11 and the current collector, thereby ensuring the coating quality.

[0063] Optionally, in this embodiment, the first spacing adjustment component 121 may also directly drive the first support member 1211 to move by setting a cylinder, which can also achieve the purpose of adjusting the spacing between the first die head 11 and the current collector in this embodiment.

[0064] The coating production line provided by the embodiment of the utility model is as follows: Figure 5 and Figure 6 As shown, the second coating device 2 includes a second die head 21, and at least one of a kiss coating mechanism 22 and a second side sliding component 23; the kiss coating mechanism 22 is used to enable the second die head 21 to kiss coat the lower surface of the current collector, and the second side sliding component 23 is used to enable the second die head 21 to slide out of the coating production line from the side of the coating production line.

[0065] In this embodiment, the second coating device 2 may include a second die 21 and a kiss coating mechanism 22, or may include a second die 21 and a second side-slip assembly 23, or may include a second die 21, a kiss coating mechanism 22, and a second side-slip assembly 23. The latter is preferably used in this embodiment, which is described in detail below. The second die 21 is used to coat the lower surface of the current collector. When the second die 21 coats the lower surface of the current collector, the second die 21 needs to be kiss-coated, that is, the lip of the second die 21 needs to be in contact with the lower surface of the current collector. For this reason, when the second coating device 2 is provided with a kiss coating mechanism 22, the coating quality of the second die 21 can be improved, thereby improving the performance of the obtained pole piece. The advantages of the second side-slip assembly 23 are somewhat similar to those of the first side-slip assembly 122, so they will not be repeated here.

[0066] The coating production line provided by the embodiment of the utility model is as follows: Figure 5 and Figure 6As shown, the second coating device 2 includes a kiss coating mechanism 22 and a second side sliding component 23; the kiss coating mechanism 22 includes a second spacing adjustment component 221 and an angle adjustment component 222; the second die head 21 is arranged on the angle adjustment component 222, the angle adjustment component 222 is arranged on the second side sliding component 23, and the second side sliding component 23 is arranged on the second spacing adjustment component 221; the angle adjustment component 222 is used to adjust the angle of the second die head 21, the second spacing adjustment component 221 is used to adjust the spacing between the second die head 21 and the current collector, and the second side sliding component 23 is used to make the second die head 21 slide out from the side of the coating production line.

[0067] In this embodiment, the second coating device 2 includes a kiss coating mechanism 22 and a second side sliding assembly 23, so that the second die head 21 can achieve kiss coating, thereby improving the coating quality, and enable the second die head 21 to slide out from the side of the coating production line, which is convenient for operators to inspect and maintain.

[0068] Furthermore, in this embodiment, since the angle adjustment component 222 has a high precision requirement when driving the second die head 21 to rotate, preferably, the angle adjustment component 222 is arranged on the second spacing adjustment component 221, and the second die head 21 is arranged on the angle adjustment component 222. Similarly, the inspection and maintenance frequency of the second spacing adjustment component 221 is low, so the second side sliding component 23 only drives the second die head 21 and the angle adjustment component 222 for installing the second die head 21 to slide out from the side of the coating production line.

[0069] The coating production line provided by the embodiment of the utility model is as follows: Figure 5 and Figure 6 As shown, the second spacing adjustment component 221 includes a second telescopic member 2211 and a second support member 2212; the second side sliding component 23 is arranged on the second support member 2212, the second telescopic member 2211 is connected to the second support member 2212, and drives the second support member 2212 to move towards or away from the collector.

[0070] In this embodiment, the second support member 2212 is also preferably a plate-like structure. The second support member 2212 is slidably installed on the frame 5 of the battery production system by cooperating with a slide rail and a slider. The second telescopic member 2211 is any one of a pneumatic cylinder, an oil cylinder or an electric cylinder. The cylinder end of the second telescopic member 2211 is fixed on the frame 5, and the piston end is connected to the second support member 2212, and drives the second support member 2212 to slide on the frame 5, so that the second support member 2212 can drive the coating die head to move toward or away from the current collector.

[0071] The coating production line provided by the embodiment of the utility model is as follows: Figure 5 and Figure 6As shown, the angle adjustment component 222 includes a rotary driving member 2221 and a rotary mounting member 2222; the rotary mounting member 2222 is rotatably mounted on the second side sliding component 23, the second die head 21 is fixed on the rotary mounting member 2222, the rotary driving member 2221 is transmission-connected with the rotary mounting member 2222, and drives the rotary mounting member 2222 to rotate.

[0072] In this embodiment, the rotary drive member 2221 is preferably a rotary motor. Of course, the rotary drive member 2221 can also be an internal combustion engine or a hydraulic motor. When the rotary drive member 2221 is a rotary motor, its control is relatively more convenient. The rotary mounting member 2222 is a rotary mounting shaft, which is rotatably arranged on the second side sliding assembly 23. The rotary drive member 2221 drives the rotary mounting member 2222 to rotate, thereby adjusting the angle between the second die head 21 and the current collector. When the second die head 21 rotates, there will be a gap between the lip of the second die head 21 and the current collector, so that the coating thickness can be controlled.

[0073] In this embodiment, the second side sliding assembly 23 includes a second mounting member 231, a second transmission assembly and a second driving member 234. The second mounting member 231 is used to mount the second die head 21, and the second die head 21 can be mounted on the second mounting member 231 by means of structures such as bolts, screws, rivets or pins. The second mounting member 231 is slidably mounted on the second spacing adjustment assembly 221. The second driving member 234 is transmission-connected to the second mounting member 231 through the second transmission assembly, and drives the second mounting member 231 to slide on the second spacing adjustment assembly 221, thereby driving the coating die head to slide out from the side of the coating production line.

[0074] Further, in the present embodiment, the second spacing adjustment component 221 includes a second support member 2212, and the second support member 2212 is preferably a second support plate, which has a larger bearing surface, so that the second die head 21 is more stable. Alternatively, the second support member 2212 can also be a frame structure. The second mounting member 231 is a second mounting plate, which also has a larger bearing surface. Alternatively, the second mounting member 231 can also be a frame structure. The second mounting member 231 and the second support member 2212 are arranged in parallel, and the second die head 21 is arranged on the side of the second mounting member 231 away from the second support member 2212, and the second mounting member 231 is fixedly provided with a second slide rail 235 on the side facing the second support member 2212, and the second support member 2212 is fixedly provided with a second slider 236 on the side facing the second mounting member 231, and the second slider 236 matches the second slide rail 235. The second transmission assembly includes a second screw rod 232 and a second screw rod nut 233. The second screw rod 232 is rotatably mounted on a side of the second mounting member 231 facing the second support member 2212 through a mounting seat, and the second screw rod nut 233 is fixedly mounted on a side of the second support member 2212 facing the second mounting member 231. The second driving member 234 is a second motor, and the second motor is transmission-connected to the second screw rod 232. When in use, the second motor drives the second screw rod 232 to rotate, so that the second mounting member 231 can slide, and then drives the second die head 21 to slide out from the side of the coating production line.

[0075] Optionally, in this embodiment, the second mounting member 231 may also be a frame structure, and the second driving member 234 may also be a telescopic cylinder of an air cylinder, an oil cylinder or an electric cylinder. The second transmission assembly may also be a gear rack, or a sprocket chain, etc.

[0076] Furthermore, in this embodiment, the second mounting member 231 and the second support member 2212 are both L-shaped structures, and the second mounting member 231 and the second support member 2212 are both provided with second slide rails 235 and second sliders 236 to cooperate with each other, thereby improving stability. The second mounting member 231 is provided with a die support member 51, and the rotary mounting member 2222 is fixed to the die support member 51 through an axle seat.

[0077] The coating production line provided by the embodiment of the utility model is as follows: Figure 5 and Figure 6 As shown, the kiss coating mechanism 22 includes a support assembly 24; the support assembly 24 is adjustably disposed on the second die head 21 and is used to support the current collector.

[0078] In this embodiment, the support assembly 24 is disposed at the lip of the second die head 21 and is used to support the second die head 21. During the coating process, the lip will contact the current collector. By providing the support assembly 24 to support the current collector, the force between the lip and the current collector can be adjusted, thereby preventing the surface of the current collector from being scratched by the lip, thereby improving the quality of the obtained pole piece.

[0079] In this embodiment, the support assembly 24 includes a support roller 241 and a first support seat 242. The support assembly 24 is arranged on the second die head 21 in an adjustable position, specifically, the first support seat 242 can slide on the second die head 21. Specifically, a limit plate is provided on the second die head 21, and an oblong hole is provided on the limit plate. A connecting block corresponding to the oblong hole is provided on the first support seat 242, and the first support seat 242 is slidably installed on the second die head 21 through the connecting block and the oblong hole to achieve an adjustable position. The end of the support roller 241 is rotatably arranged in the first support seat 242, and the support roller 241 is rotatably arranged, which can prevent the support roller 241 from scratching the lower surface of the current collector. Preferably, two first support seats 242 are provided, and the two first support seats 242 are respectively arranged at both ends of the support roller 241 to improve the stability of the support roller 241. The lip is a narrow and long gap, so the axial direction of the support roller 241 is preferably parallel to the length direction of the lip. The adjusting mechanism 12 adjusts the position of the support roller 241 by adjusting the position of the first support seat 242 to improve the supporting effect of the support roller 241. Optionally, in this embodiment, the support assembly 24 also includes a differential head 244 for driving the first support seat 242 to slide on the second die head 21, which has high precision.

[0080] Furthermore, in this embodiment, the support assembly 24 also includes a small roller motor 243, which is transmission-connected to the support roller 241 and drives the support roller 241 to rotate, and the linear speed of the support roller 241 during rotation is the same as the conveying speed of the collector to prevent the support roller 241 from scratching the pole piece.

[0081] It is understandable that, in this embodiment, a plurality of mounting holes may be provided on the second die head 21 for installing the first support seat 242 , which can also achieve the purpose of adjustable position setting of the first support seat 242 in this embodiment.

[0082] Furthermore, in this embodiment, the kiss coating mechanism 22 also includes a stabilizing component for keeping the current collector stable during transportation. The stabilizing component includes a second support seat 252 and two stabilizing rollers 251, and the two stabilizing rollers 251 are arranged on the second support seat 252 at an interval, and both stabilizing rollers 251 can rotate on the second support seat 252. When in use, the current collector can pass between the two stabilizing rollers 251, and under the clamping of the two stabilizing rollers 251, the current collector can be stably transported.

[0083] Optionally, in this embodiment, the stabilizing roller 251 is a wheel-shaped structure, which is only used to clamp the side of the current collector. Preferably, two supporting mechanisms are provided, and the two supporting mechanisms are respectively used to support the two side edges of the current collector in the length direction.

[0084] It can be understood that, in this embodiment, the stabilizing roller 251 can also be a shaft-shaped structure, which can also achieve the purpose of ensuring the stability of the collector transportation in this embodiment.

[0085] Preferably, in this embodiment, in order to make the stabilizing assembly better match the parameters of the current collector, the positions of the two stabilizing rollers 251 on the support seat can be adjusted, or the position of the second support seat 252 on the battery production system can be adjusted, or the above two settings can be used at the same time, and the latter is preferably used in this embodiment.

[0086] In this embodiment, the two stabilizing rollers 251 can be slidably disposed on the second support seat 252 through a roller shaft, or the second support seat 252 can be a sleeve structure, and the positions of the two stabilizing rollers 251 can be fixed by setting locking screws. Alternatively, a plurality of mounting holes for mounting the stabilizing rollers 251 can be set on the second support seat 252, which can also achieve the purpose of adjustable position setting of the stabilizing rollers 251.

[0087] Similarly, the second support base 252 can be slidably and / or rotatably arranged on the frame 5, or a plurality of installation points of the second support base 252 can be arranged on the frame 5, so as to realize the adjustable position setting of the second support base 252 on the battery production system.

[0088] In this embodiment, a mounting plate is provided on the frame 5 of the battery production system, and the second support seat 252 is installed on the mounting plate and can slide on the mounting plate. The sliding direction can be set according to the actual use situation, and the sliding of the first support seat 242 can be achieved by setting a slideway on the mounting plate. When the position of the second support seat 252 is determined, the second support seat 252 can be fixed by tightening the screws to achieve the purpose of stabilizing the current collector.

[0089] Optionally, in this embodiment, the second coating device 2 may also be provided with the first spacing adjustment component 121 in the first coating device 1 to precisely adjust the spacing between the second die head 21 and the current collector.

[0090] The coating production line provided by the embodiment of the utility model is as follows: Figure 1 As shown, it also includes a correction mechanism 3, which is used to correct the current collector; and / or; it also includes a detection mechanism, which is used to detect the thickness of the current collector, and the thickness of the current collector after being coated by the first coating device 1 and the second coating device 2.

[0091] In this embodiment, the coating production line also includes at least one of a correction mechanism 3 and a detection mechanism. Preferably, the correction mechanism 3 and the detection mechanism coating production line both include. Among them, the correction mechanism 3 is used to correct the current collector, so as to avoid the position deviation during the current collector conveying process. The correction mechanism 3 is a conventional technology in the art, so it is not repeated here. The detection mechanism is used to detect the coating quality, which includes a first detection component 41, a second detection component 42 and a third detection component 43. The above content mentioned that the first coating device 1 and the second coating device 2 are arranged in sequence along the conveying direction of the current collector. In this embodiment, the first detection component 41 is arranged upstream of the first coating device 1 to detect the thickness of the uncoated current collector, the second detection component 42 is arranged between the first coating device 1 and the second coating device 2 to detect the thickness of the current collector after coating the upper surface, and the third detection component 43 is arranged downstream of the second coating device 2 to detect the thickness of the thickly coated current collector. By setting the correction mechanism 3 and the detection mechanism, the coating quality can be improved and the performance of the obtained pole piece can be provided.

[0092] Another embodiment of the utility model further provides a battery production system, including the coating production line described in any of the above embodiments. The current collector is divided into a positive current collector and a negative current collector; two coating production lines are set, one coating production line is used to coat the positive current collector, and the other coating production line is used to coat the negative current collector, and the two coating production lines are stacked up and down.

[0093] In this embodiment, the electrode sheet made of the positive current collector is the positive electrode sheet, and the electrode sheet made of the negative current collector is the negative electrode sheet; two coating production lines are set, one coating production line is used to coat the positive current collector, and the other coating production line is used to coat the negative current collector, and the two coating production lines are stacked up and down. By integrating the two coating production lines together, the positive electrode sheet and the negative electrode sheet can be produced synchronously, further improving the production efficiency.

[0094] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0095] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coating production line for coating the surface of a current collector, characterized in that: The coating production line comprises: a first coating device (1), a second coating device (2) and a conveying device; The conveying device is used to convey the current collector, and along the conveying direction of the current collector, the first coating device (1) and the second coating device (2) are arranged at intervals; The first coating device (1) is used to coat the upper surface of the current collector, and the second coating device (2) is used to coat the lower surface of the current collector.

2. The coating production line according to claim 1, characterized in that: The first coating device (1) comprises a first die head (11) and an adjustment mechanism (12); The first die head (11) is arranged on the adjustment mechanism (12); The adjusting mechanism (12) is used to adjust the distance between the first die head (11) and the current collector, and / or the adjusting mechanism (12) is used to make the first die head (11) slide out of the coating production line.

3. The coating production line according to claim 2, characterized in that: The adjustment mechanism (12) comprises a first spacing adjustment component (121) and a first side sliding component (122); The first side-sliding component (122) is arranged on the first spacing adjustment component (121), and the first die head (11) is arranged on the first side-sliding component (122); The first spacing adjustment component (121) is used to adjust the spacing between the first die head (11) and the current collector, and the first side sliding component (122) is used to make the first die head (11) slide out from the side of the coating production line.

4. The coating production line according to claim 1, characterized in that: The second coating device (2) comprises a second die head (21), and at least one of a kiss coating mechanism (22) and a second side sliding component (23); The kiss coating mechanism (22) is used to enable the second die head (21) to kiss coat the lower surface of the current collector, and the second side sliding component (23) is used to enable the second die head (21) to slide out of the coating production line from the side of the coating production line.

5. The coating production line according to claim 4, characterized in that: The second coating device (2) comprises a kiss coating mechanism (22) and a second side sliding component (23); The kiss coating mechanism (22) comprises a second spacing adjustment component (221) and an angle adjustment component (222); The second die head (21) is arranged on the angle adjustment component (222), the angle adjustment component (222) is arranged on the second side sliding component (23), and the second side sliding component (23) is arranged on the second spacing adjustment component (221); The angle adjustment component (222) is used to adjust the angle of the second die head (21), the second spacing adjustment component (221) is used to adjust the spacing between the second die head (21) and the current collector, and the second side sliding component (23) is used to make the second die head (21) slide out from the side of the coating production line.

6. The coating production line according to claim 5, characterized in that: The second spacing adjustment component (221) comprises a second telescopic member (2211) and a second supporting member (2212); The second side-sliding component (23) is arranged on the second supporting member (2212), and the second telescopic member (2211) is connected to the second supporting member (2212) and drives the second supporting member (2212) to move in a direction approaching or away from the current collector.

7. The coating production line according to claim 5, characterized in that: The angle adjustment component (222) comprises a rotary driving component (2221) and a rotary mounting component (2222); The rotary mounting member (2222) is rotatably mounted on the second side sliding assembly (23); the second die head (21) is fixedly mounted on the rotary mounting member (2222); the rotary driving member (2221) is transmission-connected to the rotary mounting member (2222) and drives the rotary mounting member (2222) to rotate.

8. The coating production line according to claim 4, characterized in that: The kiss coating mechanism (22) comprises a support assembly (24); The support assembly (24) is arranged on the second die head (21) in an adjustable position and is used to support the current collector.

9. The coating production line according to claim 1, characterized in that: It also includes a deviation correction mechanism (3), wherein the deviation correction mechanism (3) is used to correct the deviation of the current collector; and / or; It also comprises a detection mechanism, which is used to detect the thickness of the current collector and the thickness of the current collector after being coated by the first coating device (1) and the second coating device (2).

10. A battery production system, characterized in that: Comprising a coating production line as claimed in any one of claims 1 to 9; The current collector is divided into a positive electrode current collector and a negative electrode current collector; two coating production lines are provided, one of which is used to coat the positive electrode current collector, and the other coating production line is used to coat the negative electrode current collector, and the two coating production lines are stacked up and down.

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