Coating equipment

Abstract

The utility model provides coating equipment. The coating equipment comprises a first coating device, a second coating device, a first surface density detection device, a drying device and a clamping device, the first coating device is used for coating the first surface of the electrode plate; and the second coating device is used for coating the second surface of the electrode pole piece. The first surface is opposite to the second surface. And the first surface density detection device is positioned between the first coating device and the second coating device. And the drying device is positioned at the downstream of the second coating device along the conveying path of the electrode pole piece. And the clamping device is positioned between the second coating device and the drying device. And the clamping device is used for clamping the electrode plate. According to the coating equipment, the two opposite surfaces of the electrode pole piece can be coated, and the whole electrode pole piece is dried after being coated, so that the drying process after the first surface is coated and before the second surface is coated is reduced, the coating process of the electrode pole piece is greatly shortened, and the coating efficiency of the electrode pole piece is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating equipment, in particular to a coating equipment. Background Art

[0002] The existing coating equipment can only coat one side of the electrode pole piece when coating the electrode pole piece. When coating the electrode pole piece, one side of the electrode pole piece needs to be coated first, and then the coated electrode pole piece is dried. After the pole piece is dried, the other side of the electrode pole piece is coated. The coating process flow of the electrode pole piece is long and the coating efficiency is low. Summary of the Utility Model

[0003] The utility model provides a coating equipment to solve the problem that the existing coating equipment can only coat one side of the electrode pole piece.

[0004] The utility model provides a coating equipment, which comprises a first coating device, a second coating device, a first surface density detection device, a drying device and a clamping device. The first coating device is used for coating the first surface of the electrode pole piece. The second coating device is located downstream of the first coating device along the conveying path of the electrode pole piece. The second coating device is used for coating the second surface of the electrode pole piece. The first surface and the second surface are opposite to each other. The first surface density detection device is located between the first coating device and the second coating device. The drying device is located downstream of the second coating device along the conveying path of the electrode pole piece. The drying device is used for drying the electrode pole piece. The clamping device is located between the second coating device and the drying device. The clamping device is used for clamping the electrode pole piece.

[0005] In the coating equipment provided by the utility model, on the one hand, based on the fact that the first coating device is used for coating the first surface of the electrode pole piece and the second coating device is used for coating the second surface of the electrode pole piece, the coating equipment can coat two opposite surfaces of the electrode pole piece, and after the two surfaces of the electrode pole piece are coated, the whole is dried, thus reducing the processes such as drying, rewinding and unwinding before coating the second surface after coating the first surface, greatly shortening the coating process flow of the electrode pole piece and improving the coating efficiency of the electrode pole piece. On the other hand, the first surface density detection device can detect the surface density of the coated electrode pole piece to realize the real-time monitoring of the coating surface density of the electrode pole piece, thereby improving the coating quality of the electrode pole piece. On the third hand, the clamping device clamps the electrode pole piece after coating the first surface and the second surface, so that the electrode pole piece is kept stable, thereby reducing the fluctuation of the electrode pole piece at the position of the second coating device and further improving the coating quality of the electrode pole piece.

[0006] In some embodiments, the coating device further includes a first guiding roller, which is located between the first coating device and the second coating device. The separation point of the first guiding roller and the electrode tab, the contact point of the second coating device and the electrode tab, and the clamping point of the clamping device and the electrode tab are collinearly arranged. Both the first guiding roller and the second coating device are located below the electrode tab.

[0007] In some embodiments, the coating device further includes a second guiding roller, which is located between the first coating device and the first surface density detection device, and the second guiding roller is in contact with the electrode tab.

[0008] In some embodiments, the coating device further includes a second surface density detection device located between the second coating device and the drying device.

[0009] In some embodiments, the clamping device is located between the second surface density detection device and the drying device.

[0010] In some embodiments, the second coating device includes a first die body and a second die body. A slurry channel is formed between the first die body and the second die body. The first die body is located upstream of the second die body along the conveying path of the electrode tab. The first die body is in contact with the electrode tab, and an arc portion is provided at one end of the first die body close to the electrode tab. The second die body is spaced apart from the electrode tab.

[0011] In some embodiments, the clamping device is used to perform non-contact clamping or contact clamping on the electrode tab.

[0012] In some embodiments, the clamping device includes a plurality of air flotation members, and the plurality of air flotation members are respectively arranged on opposite sides of the electrode tab, and the plurality of air flotation members are used to perform air flotation clamping on the electrode tab; alternatively, the clamping device includes a plurality of clamping rollers, and the plurality of clamping rollers are respectively arranged on opposite sides of the electrode tab. The electrode tab includes a coating area and a non-coating area arranged along a direction perpendicular to the conveying direction, and the plurality of clamping rollers are used to clamp the non-coating area.

[0013] In some embodiments, the coating device further includes a breakage detection device, which is located between the first coating device and the second coating device, and the breakage detection device is used to detect whether the electrode tab is broken.

[0014] In some embodiments, the coating device further includes a first defect detection device located between the first coating device and the second coating device, and the first defect detection device is configured to detect the coating quality of the first surface, and / or, the coating device further includes a second defect detection device located between the second coating device and the clamping device, and the second defect detection device is configured to detect the coating quality of the second surface. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 is a schematic structural diagram of the coating device provided by the embodiments of the present invention.

[0017] Figure 2 is Figure 1 an enlarged view of part I in

[0018] Figure 3 is Figure 2 an enlarged view of part II in

[0019] Figure 4 is a partial enlarged view of the first coating device provided by the present invention in some embodiments.

[0020] Figure 5 is a schematic structural diagram of the electrode plate provided by the embodiments of the present invention.

[0021] Main reference numerals: Coating device 100; First coating device 11; Second coating device 12; First die body 121; Arc portion 1211; Straight portion 1212; Second die body 122; Slurry channel 123; First surface density detection device 131; Second surface density detection device 132; Drying device 14; Clamping device 15; Clamping roller 151; Air floating member 152; First guide roller 161; Second guide roller 162; Breakage detection device 17; Transmitter 171; Receiver 172; First defect detection device 181; Second defect detection device 182; Electrode plate 200; Coating area 210; Non-coating area 220; First surface 201; Second surface 202.

[0022] The following specific embodiments will further illustrate the present invention in conjunction with the above drawings. Specific Embodiments

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0024] Referring to "embodiments" or "embodiment modes" herein means that the specific features, structures or characteristics described in connection with the embodiments or embodiment modes may be included in at least one embodiment of the present utility model. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] It should be noted that the terms in the specification and claims of the present utility model and the above-mentioned accompanying drawings are only for describing specific embodiments, and are not intended to limit the present utility model. The terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned accompanying drawings are used to distinguish different objects, rather than to describe a specific order.

[0026] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a coating device 100 provided by an embodiment of the present utility model. The coating device 100 includes a first coating device 11, a second coating device 12, a first surface density detection device 131, a drying device 14, and a clamping device 15. The first coating device 11 is used to coat the first surface 201 of the electrode sheet 200. The second coating device 12 is located downstream of the first coating device 11 along the conveying path of the electrode sheet 200. The second coating device 12 is used to coat the second surface 202 of the electrode sheet 200. The first surface 201 and the second surface 202 are arranged opposite to each other. The first surface density detection device 131 is located between the first coating device 11 and the second coating device 12. The drying device 14 is located downstream of the second coating device 12 along the conveying path of the electrode sheet 200. The drying device 14 is used to dry the electrode sheet 200. The clamping device 15 is located between the second coating device 12 and the drying device 14. The clamping device 15 is used to clamp the electrode sheet 200. The coating device 100 further includes an unwinding device and a winding device (not shown in the figure). The unwinding device is used to release the electrode sheet to be coated. The winding device is used to collect the electrode sheet after coating and drying.

[0027] In the coating device 100 provided by the present utility model, on the one hand, based on the fact that the first coating device 11 is used for coating the first surface 201 of the electrode sheet 200, and the second coating device 12 is used for coating the second surface 202 of the electrode sheet 200, the coating device 100 can coat two opposite surfaces of the electrode sheet 200, and after the coating of the two surfaces of the electrode sheet 200 is completed, the whole is dried, thereby reducing processes such as drying, rewinding, and unwinding after coating the first surface 201 and before coating the second surface 202, greatly shortening the coating process flow of the electrode sheet 200 and improving the coating efficiency of the electrode sheet 200. On the other hand, the first surface density detection device 131 can detect the surface density of the coated electrode sheet 200 to realize real-time monitoring of the coating surface density of the electrode sheet 200, thereby improving the coating quality of the electrode sheet 200. On the yet another hand, the clamping device 15 clamps the electrode sheet 200 after coating the first surface 201 and the second surface 202, keeping the electrode sheet 200 stable, thereby reducing the fluctuation of the electrode sheet 200 at the position of the second coating device 12, and further improving the coating quality of the electrode sheet 200.

[0028] Please refer to Figure 1 and Figure 2, the coating device 100 further includes a first guide roller 161. The first guide roller 161 is located between the first coating device 11 and the second coating device 12. The first coating device 11 and the second coating device 12 are arranged vertically offset from each other in the height direction Z of the coating device 100. Wherein, the height direction Z of the coating device 100 is the direction away from the ground. The first guide roller 161 is in contact with the electrode tab 200 and is used to guide the electrode tab 200 to change the conveying direction of the electrode tab 200. After the coating device 100 is installed, the coating direction of the second coating device 12 faces away from the ground. Both the first guide roller 161 and the second coating device 12 are located below the electrode tab 200, that is, on the side of the electrode tab 200 close to the ground. The separation point of the first guide roller 161 and the electrode tab 200, the contact point of the second coating device 12 and the electrode tab 200, and the clamping point of the clamping device 15 and the electrode tab 200 are collinear, so that the electrode tab 200 is kept taut, thereby improving the coating effect of the second coating device 12 and avoiding the problem of the slurry coated on the second surface 202 falling off. Wherein, the second coating device 12 can be in contact with the electrode tab 200, so that the second coating device 12 can support the electrode tab 200, keep the electrode tab 200 taut, reduce the fluctuation generated when the electrode tab 200 is conveyed, and improve the consistency of the coating thickness. In some embodiments, the second coating device 12 can also be spaced from the electrode tab 200. It can be understood that since the slurry has a flow velocity when the second coating device 12 extrudes the slurry, and the slurry will form an impact force when it contacts the electrode tab 200, the second coating device 12 can support the electrode tab 200 through the impact force of the slurry. In some embodiments, the separation point of the first guide roller 161 and the electrode tab 200, the contact point of the second coating device 12 and the electrode tab 200, and the clamping point of the clamping device 15 and the electrode tab 200 may not be collinear. For example, along the height direction Z of the coating device 100, the contact point of the second coating device 12 and the electrode tab 200 is higher than the separation point of the first guide roller 161 and the electrode tab 200 and the clamping point of the clamping device 15 and the electrode tab 200.

[0029] Please refer to Figure 2 and Figure 3, the second coating device 12 includes a first die body 121 and a second die body 122. A slurry channel 123 is formed between the first die body 121 and the second die body 122. The slurry channel 123 is used to connect to a storage tank. The slurry flows out of the second coating device 12 through the slurry channel. The first die body 121 is located upstream of the second die body 122 along the conveying path of the electrode sheet 200. The first die body 121 is arranged in contact with the electrode sheet 200. Among them, an arc portion 1211 is provided at one end of the first die body 121 close to the electrode sheet 200 to reduce the friction between the first die body 121 and the electrode sheet 200 and prevent the first die body 121 from damaging the electrode sheet 200. The second die body 122 is arranged at an interval from the electrode sheet 200 so that the slurry flows out from the gap between the second die body 122 and the electrode sheet 200, enabling the slurry to adhere better to the electrode sheet 200.

[0030] Please refer to Figure 4 , in some embodiments, a flat portion 1212 is further provided at one end of the first die body 121 close to the electrode sheet 200. The arc portion 1211 is located on the side of the flat portion 1212 away from the second die body 122. The flat portion 1212 is arranged in contact with the electrode sheet 200. Among them, the second coating device 12 can prevent the first die body 121 from damaging the electrode sheet 200 through the arc portion 1211, and the contact between the flat portion 1212 and the electrode sheet 200 can increase the contact area between the first die body 121 and the electrode sheet 200, thereby more stably supporting the electrode sheet 200.

[0031] Please refer to again Figure 1 , the coating equipment 100 further includes a second guide roller 162. The second guide roller 162 is located between the first coating device 11 and the first surface density detection device 131. The second guide roller 162 is arranged in contact with the electrode sheet 200. The second guide roller 162 is used to tension the electrode sheet 200 to prevent wrinkles from occurring on the electrode sheet 200. The first surface density detection device 131 is located between the first guide roller 161 and the second guide roller 162, so that the tension degree of the electrode sheet 200 between the first guide roller 161 and the second guide roller 162 can be improved, thereby improving the detection effect of the first surface density detection device 131 and the detection accuracy.

[0032] In some embodiments, the coating device 100 further includes a second surface density detection device 132 located between the second coating device 12 and the drying device 14. The second surface density detection device 132 is used to detect the surface density of the coated electrode sheet 200, so as to realize real-time monitoring of the coating surface density of the electrode sheet 200, thereby improving the coating quality of the electrode sheet 200. Among them, the clamping device 15 is located between the second surface density detection device 132 and the drying device 14 to reduce the distance between the clamping device 15 and the second coating device 12, thereby further reducing the fluctuation of the electrode sheet 200 at the second coating device 12 and improving the coating quality of the second coating device 12.

[0033] Please refer to Figure 2 and Figure 5 , the electrode sheet 200 includes a coating area 210 and a non-coating area 220 arranged perpendicular to the conveying direction. The coating area 210 and the non-coating area 220 extend along the conveying direction of the electrode sheet 200. The coating area 210 can be configured as the active material area of the electrode sheet 200. The non-coating area 220 can be configured as the tab area of the electrode sheet 200. The first surface 201 and the second surface 202 are both provided with a coating area 210 and a non-coating area 220. The first coating device 11 and the second coating device 12 are respectively used to coat the coating area 210. In some embodiments, the non-coating area 220 can be set to one, and the coating area 210 is adjacent to the non-coating area 220. In some embodiments, the non-coating area 220 can be set to two, and the coating area 210 is arranged between the two non-coating areas 220. In some embodiments, the coating area 210 and the non-coating area 220 can be respectively set to multiple, and the multiple coating areas 210 and the multiple non-coating areas 220 are arranged alternately.

[0034] The clamping device 15 is used to perform contact clamping or non-contact clamping on the electrode sheet 200. Exemplarily, the clamping device 15 can perform contact clamping on the electrode sheet 200 to improve the clamping stability of the electrode sheet 200. The clamping device 15 includes a plurality of clamping rollers 151, and the plurality of clamping rollers 151 are respectively arranged on opposite sides of the electrode sheet 200. The plurality of clamping rollers 151 are used to clamp the non-coating area 220 of the electrode sheet 200 to avoid damaging the slurry coated on the electrode sheet 200. Among them, the plurality of clamping rollers 151 can be divided into one group or multiple groups. Each group of clamping rollers 151 includes at least two clamping rollers 151. At least two clamping rollers 151 are paired, and one clamping roller 151 in each pair of clamping rollers 151 is located on one side of the electrode sheet 200, and the other clamping roller 151 is located on the opposite side of the electrode sheet 200.

[0035] In some embodiments, the clamping device 15 can non - contact clamp the electrode sheet 200 to avoid damaging the slurry on the electrode sheet 200. The clamping device 15 includes a plurality of air - floating members 152, and the plurality of air - floating members 152 are respectively arranged on opposite sides of the electrode sheet 200. The plurality of air - floating members 152 are used for air - floating clamping of the electrode sheet 200. Specifically, the plurality of air - floating members 152 are arranged in pairs, and one air - floating member 152 in each pair is located on one side of the electrode sheet 200, and the other air - floating member 152 is located on the opposite side of the electrode sheet 200. The air - floating member 152 is used to blow air on the first surface 201 and the second surface 202 of the electrode sheet 200, so that the electrode sheet 200 floats between two opposite air - floating members 152.

[0036] In some embodiments, the clamping device 15 can also perform contact clamping and non - contact clamping on the electrode sheet 200. The clamping device 15 includes at least one set of clamping rollers 151 and at least one pair of air - floating members 152. Exemplarily, the clamping rollers 151 can be set to two pairs, and the air - floating members 152 can be set to one pair, and the air - floating members 152 are located between the two pairs of clamping rollers 151.

[0037] Please refer to again Figure 1 , in some embodiments, the coating device 100 further includes a breakage detection device 17. The breakage detection device 17 is used to detect whether there are holes in the electrode sheet 200 to avoid problems such as rupture or tape breakage of the electrode sheet 200 during subsequent transportation. Among them, the breakage detection device 17 can be located between the first coating device 11 and the second coating device 12 to detect whether the first coating device 11 scratches the electrode sheet 200. Exemplarily, the breakage detection device 17 can be located between the first coating device 11 and the first surface density detection device 131 to reduce the distance between the breakage detection device 17 and the first coating device 11. Thus, when there is a hole in the electrode sheet 200, the coating length of the slurry coated on the first surface 201 is reduced, the waste of the slurry is reduced, and the cost is reduced. In some embodiments, the breakage detection device 17 can be set to multiple. For example, a breakage detection device 17 can be arranged between the second coating device 12 and the drying device 14 to detect whether the second coating device 12 scratches the electrode sheet 200. Another example is that a breakage detection device 17 can be arranged upstream along the conveying path of the electrode sheet 200 of the first coating device 11 to detect the electrode sheet 200 before coating the electrode sheet 200, and avoid coating the slurry on the damaged electrode sheet 200, resulting in waste of the slurry.

[0038] Among them, the damage detection device 17 includes a transmitter 171 and a receiver 172. The transmitter 171 and the receiver 172 are located on two opposite sides of the electrode plate 200. The transmitter 171 can be located on one side of the first surface 201 or the second surface 202 of the electrode plate 200. The transmitter 171 is used to emit an optical signal to irradiate the optical signal on the electrode plate 200. The receiver 172 is used to generate a response signal when receiving the optical signal emitted by the transmitter 171. Among them, when there is a hole in the electrode plate 200, the optical signal emitted by the transmitter 171 can pass through the hole and irradiate on the receiver 172.

[0039] In some embodiments, the coating device 100 further includes a first defect detection device 181. The first defect detection device 181 is located between the first coating device 11 and the second coating device 12. The first defect detection device 181 is used to detect the coating quality of the slurry on the first surface 201. Among them, the first defect detection device 181 can be configured as a camera to image the first surface 201 of the electrode plate 200, so as to detect whether there are defects and defective areas on the first surface 201 through the image information captured by the camera. The first defect detection device 181 can be disposed opposite to the second guide roller 162. Due to the tensioning effect of the second guide roller 162 and the arc surface of the surface of the second guide roller 162, the portion of the electrode plate 200 located on the second guide roller 162 has a greater tension, so that the first defect detection device 181 can capture more detailed parts on the first surface 201 during imaging, thereby improving the inspection effect of the first defect detection device 181.

[0040] In some embodiments, the coating device 100 further includes a second defect detection device 182. The second defect detection device 182 is used to detect the coating quality of the slurry on the second surface 202. The second defect detection device 182 can be configured as a camera to image the second surface 202 of the electrode plate 200, so as to detect whether there are defects and defective areas on the second surface 202 through the image information captured by the camera. The second defect detection device 182 is located between the second coating device 12 and the clamping device 15. Due to the support of the electrode plate 200 by the second coating device 12 and the clamping of the electrode plate 200 by the clamping device 15, the portion of the electrode plate 200 between the second coating device 12 and the clamping device 15 has a greater tension, so that the second defect detection device 182 can capture more detailed parts on the second surface 202 during imaging, thereby improving the inspection effect of the second defect detection device 182. In some embodiments, the coating device 100 includes a first defect detection device 181 and a second defect detection device 182 to detect defects on both the first surface 201 and the second surface 202 of the electrode plate 200, and improve the coating quality of the electrode plate 200.

[0041] The above are only the specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A coating device, characterized in that, Including: A first coating device for coating the first surface of the electrode plate; A second coating device located downstream of the first coating device along the conveying path of the electrode plate. The second coating device is used for coating the second surface of the electrode plate, and the first surface and the second surface are arranged opposite to each other; A first surface density detection device located between the first coating device and the second coating device; A drying device located downstream of the second coating device along the conveying path of the electrode plate. The drying device is used for drying the electrode plate; And A clamping device located between the second coating device and the drying device. The clamping device is used for clamping the electrode plate.

2. The coating device according to claim 1, wherein, The coating equipment further includes a first guiding roller located between the first coating device and the second coating device. The separation point of the first guiding roller and the electrode plate, the contact point of the second coating device and the electrode plate, and the clamping point of the clamping device and the electrode plate are collinearly arranged. Both the first guiding roller and the second coating device are located below the electrode plate.

3. The coating device according to claim 2, characterized in that, The coating equipment further includes a second guiding roller located between the first coating device and the first surface density detection device. The second guiding roller is in contact with the electrode plate.

4. The coating device according to claim 1, characterized in that, The coating equipment further includes a second surface density detection device located between the second coating device and the drying device.

5. The coating device according to claim 4, wherein The clamping device is located between the second surface density detection device and the drying device.

6. The coating equipment according to claim 1, wherein The second coating device includes a first die body and a second die body. A slurry channel is formed between the first die body and the second die body. The first die body is located upstream of the second die body along the conveying path of the electrode plate. The first die body is in contact with the electrode plate. An arc portion is provided at one end of the first die body close to the electrode plate. The second die body is spaced from the electrode plate.

7. The coating device according to claim 1, wherein The clamping device is used for contact clamping and / or non-contact clamping of the electrode plate.

8. The coating device according to claim 7, characterized in that, The clamping device includes a plurality of clamping rollers. The plurality of clamping rollers are respectively arranged on opposite sides of the electrode plate. The electrode plate includes a coating area and a non-coating area arranged along the direction perpendicular to the conveying direction. The plurality of clamping rollers are used for clamping the non-coating area; and / or, the clamping device includes a plurality of air flotation members. The plurality of air flotation members are respectively arranged on opposite sides of the electrode plate. The plurality of air flotation members are used for air flotation clamping of the electrode plate.

9. The coating device according to claim 1, characterized in that The coating equipment further includes a breakage detection device located between the first coating device and the second coating device. The breakage detection device is used for detecting whether the electrode plate is broken.

10. The coating device according to claim 1, characterized in that The coating equipment further includes a first defect detection device, which is located between the first coating device and the second coating device, and the first defect detection device is used to detect the coating quality of the first surface, and / or, the coating equipment further includes a second defect detection device, which is located between the second coating device and the clamping device, and the second defect detection device is used to detect the coating quality of the second surface.

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