Slurry coating device and battery coating equipment

Abstract

The utility model discloses a slurry coating device and battery coating equipment, and the slurry coating device comprises a feeding pipe, a switching valve, a pressure regulating valve and a coating head, a feed port of the switching valve is communicated with the feed pipe, a first discharge port of the switching valve is communicated with the feed pipe, a second discharge port of the switching valve is communicated with the pressure regulating valve, and the feed port is communicated with the first discharge port or the second discharge port; the pressure regulating valve comprises a shell, a first driving part, a screw rod and a valve plate, the valve plate is slidably arranged in the shell so as to form a pressure cavity with the shell, an output shaft of the first driving part is connected with the screw rod, the valve plate is rotatably connected with the screw rod, and the first driving part drives the screw rod to rotate so as to drive the valve plate to slide; and the coating head is communicated with the pressure cavity. According to the utility model, the screw rod rotates to drive the valve plate to move so as to adjust the coating pressure, the coating pressure can be accurately adjusted only by controlling the rotating speed of the first driving piece, the stability of the coating pressure is kept, and the coating effect is improved. And during adjustment, feedback can be performed in time, and the lag problem is reduced.

Description

Technical Field

[0001] The utility model relates to the field of battery manufacturing equipment, in particular to a slurry coating device and battery coating equipment. Background Art

[0002] In the battery manufacturing process, coating is the core process and the main process step that determines the battery performance. At present, cylinders are usually used to achieve intermittent coating, which has the problems of slow coating response speed and low precision. Utility Model Content

[0003] The main purpose of the utility model is to provide a slurry coating device and a battery coating device, aiming to solve the problems of slow coating response speed and low precision in the cylinder intermittent coating method.

[0004] To achieve the above-mentioned purpose, the utility model proposes a slurry coating device, which includes a feed pipe, a switching valve, a pressure regulating valve and a coating head; the feed pipe is used to convey the slurry; the switching valve has a feed port, a first discharge port and a second discharge port; the feed port is connected to the feed pipe, the first discharge port is connected to the feed pipe, the second discharge port is connected to the pressure regulating valve, and the feed port is connected to the first discharge port or the second discharge port; the pressure regulating valve includes a shell, a first driving member, a screw rod and a valve plate, the valve plate is slidably arranged in the shell to form a pressure chamber between the shell and the shell, the output shaft of the first driving member is connected to the screw rod, the valve plate is rotatably connected to the screw rod, and the first driving member drives the screw rod to rotate to drive the valve plate to slide; the coating head is connected to the pressure chamber, and the coating head has a coating port.

[0005] Optionally, the valve plate includes a plate body, a nut seat and a connecting arm, the plate body is slidably connected to the shell, the nut seat is threadedly connected to the screw rod, and two ends of the connecting arm are respectively connected to the plate body and the nut seat.

[0006] Optionally, a sealing ring is sleeved on the outer side of the plate body.

[0007] Optionally, the switching valve includes a coating valve and a return valve, the coating valve is arranged between the feed pipe and the pressure regulating valve, the outlet end of the return valve is connected to the feed pipe, and the inlet end of the return valve is connected between the pressure regulating valve and the connection point between the feed pipe and the outlet end of the return valve.

[0008] Optionally, the coating valve includes a valve seat, a valve and a second driving member, the valve is rotatably arranged in the valve seat, the second driving member is connected to the valve seat, the output end of the second driving member is connected to the valve, and the second driving member drives the valve to rotate to open or close the valve seat.

[0009] Optionally, two first pressure sensors are spaced apart at the outlet end of the return valve, and the two first pressure sensors are also provided with regulating valves.

[0010] Optionally, a second pressure sensor is further provided between the pressure regulating valve and the coating head.

[0011] Optionally, a third pressure sensor is also connected in series on the feed pipe.

[0012] Optionally, the slurry coating device further comprises a storage tank, wherein the storage tank is used to store the slurry, and the feed pipe is connected to the storage tank.

[0013] In addition, the utility model also provides a battery coating device, and the battery coating device includes the slurry coating device as described above.

[0014] In the technical solution of the utility model, the feed pipe is used to transport the slurry raw material, the feed port is connected to the first outlet, the slurry is transported to the working chamber of the pressure regulating valve, and after the slurry required for coating is reached, the switching valve is switched to connect the feed port with the second outlet, at which time the slurry flows back to the feed pipe; at the same time, the first drive member drives the screw to rotate, thereby driving the valve plate to move and extrude the slurry from the coating port of the coating head, and the slurry coating pressure can be quickly and stably adjusted by controlling the rotation speed of the screw. After the coating is completed, the switching valve is switched again to connect the feed port with the first outlet, and intermittent coating is performed in this cycle. In this embodiment, the coating pressure is adjusted by rotating the screw to drive the valve plate to move, and the coating pressure can be accurately adjusted by controlling the rotation speed of the first drive member, maintaining the stability of the coating pressure and improving the coating effect. And when adjusting, timely feedback can be provided to reduce the hysteresis problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the pipeline of a slurry coating device in one embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the pipeline of a slurry coating device in another embodiment of the utility model;

[0018] Figure 3 This is a schematic structural diagram of a slurry coating device in one embodiment of the utility model;

[0019] Figure 4 It is a structural schematic diagram of a pressure regulating valve in one embodiment of the utility model.

[0020] Description of Figure Numbers:

[0021] Label name Label name 100 Slurry coating device 33 Screw 1 Feed pipe 34 Valve plate 2 Switching valve 341 plate body 211 Feed port 342 Nut seat 212 The first outlet 343 Connecting arm 213 The second outlet 344 Sealing ring 22 Coating valve 4 Coating head 221 Valve Seat 51 First pressure sensor 223 Second driving member 52 Control valve 23 Return valve 53 Second pressure sensor 3 Pressure regulating valve 54 The third pressure sensor 31 case 61 Storage tank 32 First drive member

[0022] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.

[0024] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] Most of the intermittent coating valves on the market use cylinders to achieve intermittent coating, and the cylinder intermittent coating response speed is slow and the precision is relatively low. The utility model provides a slurry coating device.

[0029] like Figure 1 and Figure 4 As shown, in one embodiment of the utility model, the slurry coating device 100 includes a feed pipe 1, a switching valve 2, a pressure regulating valve 3 and a coating head 4; the feed pipe 1 is used to transport the slurry; the switching valve 2 has a feed port 211, a first discharge port 212 and a second discharge port 213; the feed port 211 is connected to the feed pipe 1, the first discharge port 212 is connected to the feed pipe 1, the second discharge port 213 is connected to the pressure regulating valve 3, and the feed port 211 is connected to the first discharge port 212 Or the second discharge port 213 is connected; the pressure regulating valve 3 includes a shell 31, a first driving member 32, a screw 33 and a valve plate 34, the valve plate 34 is slidably arranged in the shell 31 to form a pressure chamber between the shell 31, the output shaft of the first driving member 32 is connected to the screw 33, the valve plate 34 is rotatably connected to the screw 33, the first driving member 32 drives the screw 33 to rotate to drive the valve plate 34 to slide; the coating head 4 is connected to the pressure chamber, and the coating head 4 has a coating port.

[0030] In the above embodiment, the feed pipe 1 is used to transport the slurry raw material, the feed port 211 is connected to the first outlet port 212, and the slurry is transported to the working chamber of the pressure regulating valve 3. After the slurry required for coating is reached, the switching valve 2 is switched to the feed port 211 and connected to the second outlet port 213. At this time, the slurry flows back to the feed pipe 1; at the same time, the first drive member 32 drives the screw 33 to rotate, thereby driving the valve plate 34 to move and extrude the slurry from the coating port of the coating head 4. By controlling the rotation speed of the screw 33, the slurry coating pressure can be quickly and stably adjusted. After the coating is completed, the switching valve 2 is switched to the feed port 211 and connected to the first outlet port 212 again, so as to perform intermittent coating in a cycle. In this embodiment, the coating pressure is adjusted by rotating the screw 33 to drive the valve plate 34 to move. It is only necessary to control the rotation speed of the first drive member 32 to accurately adjust the coating pressure, maintain the stability of the coating pressure, and improve the coating effect. And when adjusting, timely feedback can be provided to reduce the hysteresis problem.

[0031] After the slurry enters the feed pipe 1, it can flow continuously in the entire loop to avoid the waste of slurry. The first driving member 32 can be a motor, and the speed of the motor is controlled by a motor controller.

[0032] Specifically, a second pressure sensor 53 is further provided between the pressure regulating valve 3 and the coating head 4. By providing the second pressure sensor 53, the coating pressure is monitored in real time, and the rotation speed of the first driving member 32 is adjusted according to the detection result of the second pressure sensor 53. Thus, feedback regulation is achieved to ensure the consistency of coating quality during the entire coating process.

[0033] In addition, the second pressure sensor 53 can also detect the adjustment effect in real time. If there is still no obvious improvement after multiple adjustments, or a sudden pressure change occurs without adjustment, it is considered whether the entire slurry coating device 100 is faulty, and the staff is reminded to perform maintenance.

[0034] In one embodiment, see Figure 4 The valve plate 34 includes a plate body 341, a nut seat 342 and a connecting arm 343. The plate body 341 is slidably connected to the housing 31, the nut seat 342 is threadedly connected to the screw rod 33, and the two ends of the connecting arm 343 are respectively connected to the plate body 341 and the nut seat 342. Since the connecting arm 343 connects the plate body 341 and the nut seat 342 into a whole, the entire mechanism can only slide in the up-and-down direction. The first driving member 32 drives the screw rod 33 to rotate clockwise, which is converted into the upward movement of the nut seat 342 through the threaded connection relationship, thereby driving the plate body 341 to squeeze the slurry upward.

[0035] There are multiple connecting arms 343, which are spaced apart along the circumference of the screw rod 33, so as to ensure the smoothness of the sliding of the plate body 341 and avoid the plate body 341 from getting stuck during the movement due to uneven force.

[0036] The outer side of the plate body 341 is sleeved with a sealing ring 344. The sealing ring 344 is in close contact with the inner wall of the housing 31 to ensure the sealing performance between the plate body 341 and the housing 31.

[0037] In one embodiment, please refer to Figure 2 and Figure 3 , the switching valve 2 includes a coating valve 22 and a return valve 23, the coating valve 22 is arranged between the feed pipe 1 and the pressure regulating valve 3, the outlet end of the return valve 23 is connected to the feed pipe 1, and the inlet end of the return valve 23 is connected between the pressure regulating valve 3 and the connection between the feed pipe 1 and the outlet end of the return valve 23. That is, the switching valve 2 is composed of the coating valve 22 and the return valve 23, and when one of the coating valve 22 and the return valve 23 is opened, the other is closed. When the coating valve 22 is opened, the slurry enters the pressure regulating valve 3, and when the return valve 23 is opened, the slurry flows back to the feed pipe 1.

[0038] In other embodiments, the switching valve 2 may also be a three-way solenoid valve, and the discharge port may be switched through timing control.

[0039] Specifically, the coating valve 22 includes a valve seat 221, a valve and a second driving member 223. The valve is rotatably arranged in the valve seat 221. The second driving member 223 is connected to the valve seat 221. The output end of the second driving member 223 is connected to the valve. The second driving member 223 drives the valve to rotate to open or close the valve seat 221. The valve seat 221 and the valve form a ball valve structure. The second driving member 223 drives the valve of the ball valve to rotate to achieve conduction or closing. There is a strong shear force between the valve of the ball valve and the valve seat 221, which is particularly suitable for media containing fibers, tiny solid particles, etc.

[0040] In a preferred embodiment, the structure of the return valve 23 is consistent with that of the coating valve 22. The specifications of the return valve 23 and the coating valve 22 are ensured to be consistent, thereby reducing the specifications of spare parts.

[0041] Based on the above embodiment, the outlet end of the return valve 23 is provided with a first pressure sensor 51 at intervals, and a regulating valve 52 is provided between the two first pressure sensors 51. The two first pressure sensors 51 respectively detect the pressure before and after the adjustment of the discharge end of the return valve 23, and the discharge pressure is adjusted by the regulating valve 52 to balance the pressure in the entire circuit.

[0042] Furthermore, a third pressure sensor 54 is also provided in series on the feed pipe 1. The third pressure sensor 54 is used to adjust the pressure in the feed pipe 1, that is, the regulating valve 52 adjusts the discharge pressure of the return valve 23, and also needs to ensure that the pressure of the slurry flowing back into the feed pipe 1 after merging with the slurry in the feed pipe 1 is still within a preset range.

[0043] In one embodiment, please refer to Figure 2 The slurry coating device 100 further includes a storage tank 61, which is used to store slurry, and the feed pipe 1 is connected to the storage tank 61. A certain amount of slurry is pre-stored in the storage tank 61 to ensure the continuity of slurry supply.

[0044] A liquid level detector can be set in the storage tank 61. When the slurry in the storage tank 61 is lower than the preset capacity, the slurry is delivered to the storage tank 61 in time. When the slurry in the storage tank 61 is lower than the preset minimum capacity, the coating demand cannot be met and the entire slurry coating device 100 stops running.

[0045] In other embodiments, the feed pipe 1 may be connected to an external storage device, and the slurry in the external storage device may be extracted and the source pressure may be provided by a pump or other equipment.

[0046] In addition, the utility model also provides a battery coating device, which includes the above slurry coating device 100. Since the battery coating device includes the above slurry coating device 100, the battery coating device has all the beneficial effects of the above slurry coating device 100, which will not be repeated here.

[0047] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A slurry coating device, characterized in that: The slurry coating device includes a feed pipe, a switching valve, a pressure regulating valve and a coating head; the feed pipe is used to convey the slurry; the switching valve has a feed port, a first discharge port and a second discharge port; the feed port is connected to the feed pipe, the first discharge port is connected to the feed pipe, the second discharge port is connected to the pressure regulating valve, and the feed port is connected to the first discharge port or the second discharge port; the pressure regulating valve includes a shell, a first driving member, a screw rod and a valve plate, the valve plate is slidably arranged in the shell to form a pressure chamber between the shell and the shell, the output shaft of the first driving member is connected to the screw rod, the valve plate is rotatably connected to the screw rod, and the first driving member drives the screw rod to rotate to drive the valve plate to slide; the coating head is connected to the pressure chamber, and the coating head has a coating port.

2. The slurry coating device according to claim 1, characterized in that: The valve plate includes a plate body, a nut seat and a connecting arm. The plate body is slidably connected to the shell, the nut seat is threadedly connected to the screw rod, and two ends of the connecting arm are respectively connected to the plate body and the nut seat.

3. The slurry coating device according to claim 2, characterized in that: A sealing ring is sleeved on the outer side of the plate body.

4. The slurry coating device according to claim 1, characterized in that: The switching valve includes a coating valve and a return valve, the coating valve is arranged between the feed pipe and the pressure regulating valve, the outlet end of the return valve is connected to the feed pipe, and the inlet end of the return valve is connected between the feed pipe and the outlet end of the return valve and the pressure regulating valve.

5. The slurry coating device according to claim 4, characterized in that: The coating valve includes a valve seat, a valve and a second driving member, wherein the valve is rotatably arranged in the valve seat, the second driving member is connected to the valve seat, the output end of the second driving member is connected to the valve, and the second driving member drives the valve to rotate to open or close the valve seat.

6. The slurry coating device according to claim 4, characterized in that: Two first pressure sensors are arranged at intervals at the outlet end of the return valve, and the two first pressure sensors are also provided with regulating valves.

7. The slurry coating device according to any one of claims 1 to 6, characterized in that: A second pressure sensor is also provided between the pressure regulating valve and the coating head.

8. The slurry coating device according to any one of claims 1 to 6, characterized in that: The feed pipe is also serially provided with a third pressure sensor.

9. The slurry coating device according to any one of claims 1 to 6, characterized in that: The slurry coating device also includes a storage tank, which is used to store slurry, and the feed pipe is connected to the storage tank.

10. A battery coating device, characterized in that: The battery coating equipment includes the slurry coating device according to any one of claims 1 to 9.

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