Coating device and coating production line

Abstract

The utility model discloses a coating device which comprises a die head, a material storage part, a coating assembly, a material returning assembly and a material supplementing assembly, the material storage part is provided with a material storage cavity, the material supplementing assembly comprises a material pushing part, and the material pushing part is arranged in the material storage cavity in a sliding mode. The utility model further discloses a coating production line. The coating conveyed by the coating assembly flows into the die head after flowing through the material storage part, when the residual 6mm area of the tail part of the pole piece is not coated, the coating assembly reduces the conveying of the coating, and meanwhile, the material pushing part conveys the coating in the material storage cavity into the die head together, so that the conveying amount of the coating is increased; afterwards, the material returning assembly recovers redundant coating in the die head, meanwhile, the material pushing part resets to enable negative pressure to be generated in the material storage cavity, part of the coating is recovered to the material returning assembly, and the other part of the coating is reserved in the material storage cavity; therefore, the coating can be supplemented when the pole piece is coated to the tail part of 6mm, so that the coating thickness is increased, the thickness difference between the tail part and the middle area of the pole piece is reduced, and the phenomenon of lithium precipitation during the subsequent use of a battery cell is improved.

Description

Technical Field

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

[0002] As the advantages of lithium-ion batteries gradually become more prominent, their application scope is becoming more and more extensive. For example, lithium-ion batteries are widely used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, as well as power tools, electric bicycles, electric motorcycles, electric vehicles, military equipment, aerospace and other fields.

[0003] The pole piece is one of the important components of lithium batteries. The manufacture of pole pieces requires the use of coating technology. Among them, the double-layer coating process is applied in the lithium battery industry. However, the tail of the double-layer coated pole piece is affected by the superposition of the upper and lower thinning areas. The thickness of the tail 0-6mm pole piece is much lower than the thickness of the middle area of ​​the pole piece. In the double-layer coating process of the anode, when the tail area of ​​the pole piece is thin, the battery cell is prone to lithium deposition in the thinning area during later use. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a coating device and a coating production line.

[0005] The utility model discloses a coating device, comprising: a die head, a material storage piece, a coating component, a material return component and a material replenishing component. The material storage piece has a material storage cavity, and the die head, the coating component, the material return component and the material replenishing component are all connected to the material storage cavity; the material replenishing component comprises a material pushing piece, and the material pushing piece is slidably arranged in the material storage cavity.

[0006] According to one embodiment of the utility model, the feeding assembly also includes a bracket and a driving member, the bracket and the die head are respectively arranged at two ends of the material storage member, the driving member and the pushing member are both arranged on the bracket, and the pushing member is connected to the output end of the driving member.

[0007] According to one embodiment of the present invention, the feeding assembly further comprises a transmission member, which is respectively connected to the output end of the driving member and the pushing member.

[0008] According to one embodiment of the utility model, the transmission member includes a screw rod and a slider, the screw rod is connected to the output end of the driving member, and the screw rod is rotatably connected to the bracket, the slider is slidably connected to the screw rod, and the pusher is connected to the slider.

[0009] According to an embodiment of the present invention, the driving component is a motor.

[0010] According to one embodiment of the utility model, the paint assembly includes a paint conveying component, a paint power component and a paint valve. The output end of the paint power component is connected to the paint conveying component. The paint valve is arranged on the paint conveying component. The paint conveying component has a conveying flow channel, which is connected or blocked with the storage chamber through the paint valve.

[0011] According to one embodiment of the utility model, the return material component includes a return material conveying member, a return material power member and a return material valve. The output end of the return material power member is connected to the return material conveying member. The return material valve is arranged on the return material conveying member. The return material conveying member has a return material flow channel. The return material flow channel is connected or blocked with the material storage chamber through the return material valve, or the return material flow channel is connected or blocked with the coating component through the return material valve.

[0012] According to one embodiment of the utility model, a conducting piece is also included, and the die head and the material storage chamber are connected through the conducting piece.

[0013] According to one embodiment of the utility model, a controller is also included, and the controller is electrically connected to the coating component, the material return component and the material replenishment component.

[0014] The utility model discloses a coating production line, which comprises: the coating device mentioned above.

[0015] The beneficial effect of the utility model is that the paint conveyed by the coating component flows through the storage piece and then flows into the die head. When the remaining 6mm area of ​​the tail of the pole piece is not coated, the coating component reduces the delivery of the paint. At the same time, the pushing piece conveys the paint in the storage cavity to the die head to increase the delivery amount of the paint; then, the return material component recovers the excess paint in the die head. At the same time, the pushing piece is reset to generate a negative pressure in the storage cavity, part of the paint is recovered to the return material component, and the other part is retained in the storage cavity; in this way, the paint can be replenished when the pole piece is coated to the remaining 6mm at the tail, thereby increasing the coating thickness, reducing the thickness difference between the tail and the middle area of ​​the pole piece, and improving the phenomenon of lithium precipitation during subsequent battery cell use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the coating device;

[0018] Figure 2 A side view of the coating device.

[0019] Description of Reference Numerals

[0020] 1. Die head;

[0021] 2. Storage parts;

[0022] 3. Paint assembly; 31. Paint delivery component; 32. Paint power component;

[0023] 4. Return material assembly; 41. Return material conveying member; 42. Return material power member;

[0024] 5. Feeding assembly; 51. Pushing member; 52. Bracket; 53. Driving member; 54. Transmission member; 541. Screw rod; 542. Sliding block;

[0025] 6. Conductive parts. DETAILED DESCRIPTION

[0026] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0027] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0028] Embodiment 1

[0029] like Figure 1 and Figure 2 As shown, Figure 1 It is a schematic diagram of the three-dimensional structure of the coating device; Figure 2It is a side schematic diagram of the coating device. The coating device includes a die head 1, a material storage part 2, a coating component 3, a return material component 4 and a replenishing component 5. The die head 1 is used to coat the electrode. The material storage part 2 is connected to the die head 1. The coating component 3, the return material component 4 and the replenishing component 5 are all connected to the material storage part 2; wherein the material storage part 2 has a storage cavity, and the interior of the die head 1 is connected to the storage cavity. At the same time, the coating component 3 and the return material component 4 are both connected to the storage part 2. The replenishing component 5 acts on the storage cavity to push the coating in the storage cavity into the die head 1. In this embodiment, the die head 1 adopts the existing structure, which will not be repeated here.

[0030] In specific application, the coating component 3 includes a coating delivery member 31, a coating power member 32 and a coating valve. The coating delivery member 31 is connected to the material storage member 2, the output end of the coating power member 32 is connected to the coating delivery member 31, and the coating valve is arranged on the coating delivery member 31. Specifically, the coating delivery member 31 is located at the lower part of the material storage member 2, and the coating delivery member 31 has a delivery flow channel, which is connected to or blocked by the material storage chamber through the coating valve; the coating output by the coating power member 32 flows through the delivery flow channel and the material storage chamber and then flows into the die head 1, and the die head 1 then casts the coating onto the electrode. The coating power member 32 in this embodiment is an existing pump body product; the coating valve is an existing switch valve product.

[0031] The return material assembly 4 includes a return material conveying member 41, a return material power member 42 and a return material valve. The return material conveying member 41 is connected to the material storage member 2 or the paint conveying member 31. The output end of the return material power member 42 is connected to the return material conveying member 41, and the return material valve is arranged on the return material conveying member 41. Specifically, the return material conveying member 41 is connected to the paint conveying member 31, and the return material conveying member 41 has a return material flow channel. The return material flow channel is connected or blocked with the paint flow channel through the return material valve; after stopping the conveying of the paint, the return material power member 42 generates suction to recover the paint remaining in the die head 1 through the material storage chamber and the return material flow channel. Of course, the return material flow channel can also be directly connected to the material storage chamber, and there is no specific limitation on this. The return material power member 42 in this embodiment is an existing pump body product; the return material valve is an existing switch valve product.

[0032] The feeding assembly 5 includes a pusher 51, which is slidably arranged in the material storage chamber, and the paint in the material storage chamber is pushed into the die head 1 by the pusher 51; in addition, the pusher 51 can also be reset to generate negative pressure, so that part of the paint in the die head 1 is sucked into the material storage chamber for storage. Preferably, the feeding assembly 5 also includes a bracket 52 and a driving member 53, the bracket 52 is connected to the material storage member 2, the driving member 53 is arranged on the bracket 52, and the output end of the driving member 53 is connected to the pusher 51, and the driving member 53 drives the pusher 51 to slide in the material storage chamber. Further, the feeding assembly 5 also includes a transmission member 54, which is connected to the output end of the driving member 53 and the pusher 51. The transmission member 54 includes a screw rod 541 and a slider 542, the screw rod 541 is connected to the output end of the driving member 53, and the screw rod 541 is rotatably arranged on the bracket 52, the slider 542 is slidably connected to the screw rod 541, and the pusher 51 is connected to the slider 542. When the driving member 53 generates power, it will drive the screw rod 541 to rotate relative to the bracket 52, thereby driving the slider 542 and the pusher 51 to move. In this embodiment, the driving member 53 is a motor.

[0033] Furthermore, the coating device further includes a conductive member 6, which connects the die head 1 and the material storage member 2; the conductive member 6 is also a hollow structure, so that the die head 1 is connected to the material storage chamber. The coating device further includes a controller, which is electrically connected to the coating power member, the reflux power member and the driving member 53, and the controller coordinates the coating power member, the reflux power member and the driving member 53 to work in coordination with each other.

[0034] Coating mode: the coating valve is in the open state, the coating power part 32 continuously inputs coating into the conveying channel, the coating flows through the storage chamber and the guide part 6 and then flows into the die head 1, and the die head 1 coats the coating on the electrode; when it is identified that there is 6mm left at the tail of the electrode that needs to be coated, the coating valve gradually turns to the closed state, at this time, the driving part 53 starts to work, and it drives the pushing part 51 to move toward the die head 1 through the screw rod 541 and the slider 542, and the pushing part 51 pushes the coating in the storage chamber into the die head 1.

[0035] Return mode: After the electrode is coated, the coating valve is completely closed, that is, the storage chamber and the conveying flow channel are blocked, the reflux valve is in an open state, and the reflux power component starts to work to recover the remaining coating in the die head 1. At the same time, the driving component 53 also starts to drive the pushing component 51 to reset. In this process, the coating in the die head 1 is returned to the storage chamber through the conducting component 6, among which a part of the coating will flow along the return flow channel to the return power component 42, and another part of the coating will stay in the storage chamber based on the negative pressure generated by the reset of the pushing component 51, waiting to be used in the next coating mode.

[0036] To summarize, the paint delivered by the coating component 3 flows through the storage component 2 and then flows into the die head 1. When the remaining 6mm area of ​​the tail of the pole piece is not coated, the coating component 3 reduces the delivery of the paint. At the same time, the pushing component 51 delivers the paint in the storage cavity to the die head 1 to increase the delivery amount of the paint; then, the return component 4 recovers the excess paint in the die head 1. At the same time, the pushing component 51 is reset to generate a negative pressure in the storage cavity, and part of the paint is recovered to the return component 4, and the other part is retained in the storage cavity; in this way, the paint can be replenished when the pole piece is coated to the remaining 6mm at the tail, thereby increasing the coating thickness, reducing the thickness difference between the tail and the middle area of ​​the pole piece, and improving the phenomenon of lithium precipitation during subsequent battery cell use.

[0037] Embodiment 2

[0038] The coating production line of the present application includes a coating device, wherein the coating device adopts the structure of the first embodiment, which will not be elaborated here.

[0039] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A coating device, characterized in that: include: A die head (1), a material storage member (2), a coating component (3), a return material component (4) and a replenishing material component (5); the material storage member (2) has a material storage cavity; the die head (1), the coating component (3), the return material component (4) and the replenishing material component (5) are all connected to the material storage cavity; the replenishing material component (5) comprises a pushing member (51), and the pushing member (51) is slidably arranged in the material storage cavity.

2. The coating device according to claim 1, characterized in that: The feeding component (5) further comprises a bracket (52) and a driving member (53), wherein the bracket (52) and the die head (1) are respectively arranged at two ends of the material storage member (2), the driving member (53) and the pushing member (51) are both arranged on the bracket (52), and the pushing member (51) is connected to the output end of the driving member (53).

3. The coating device according to claim 2, characterized in that: The feeding assembly (5) further comprises a transmission member (54), wherein the transmission member (54) is respectively connected to the output end of the driving member (53) and the pushing member (51).

4. The coating device according to claim 3, characterized in that: The transmission member (54) comprises a screw rod (541) and a slider (542), wherein the screw rod (541) is connected to the output end of the driving member (53), and the screw rod (541) is rotatably connected to the bracket (52), the slider (542) is slidably connected to the screw rod (541), and the pushing member (51) is connected to the slider (542).

5. The coating device according to claim 4, characterized in that: The driving member (53) is a motor.

6. The coating device according to claim 1, characterized in that: The paint assembly (3) comprises a paint conveying member (31), a paint power member (32) and a paint valve, wherein the output end of the paint power member (32) is connected to the paint conveying member (31), the paint valve is arranged on the paint conveying member (31), and the paint conveying member (31) has a conveying flow channel, and the conveying flow channel is connected to or blocked by the material storage chamber through the paint valve.

7. The coating device according to claim 1, characterized in that: The return material assembly (4) comprises a return material conveying member (41), a return material power member (42) and a return material valve, wherein the output end of the return material power member (42) is connected to the return material conveying member (41), the return material valve is arranged on the return material conveying member (41), and the return material conveying member (41) has a return material flow channel, the return material flow channel is connected to or blocked by the material storage chamber through the return material valve, or the return material flow channel is connected to or blocked by the coating assembly (3) through the return material valve.

8. The coating device according to any one of claims 1 to 7, characterized in that: It also comprises a conducting piece (6), and the die head (1) and the material storage chamber are connected via the conducting piece (6).

9. The coating device according to any one of claims 1 to 7, characterized in that: It also includes a controller, which is electrically connected to the coating component (3), the material return component (4) and the material replenishment component (5).

10. A coating production line, characterized in that: include: The coating device according to any one of claims 1 to 9.

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