Coating temporary storage device and slurry coating equipment

Abstract

The utility model provides a coating temporary storage device and slurry coating equipment, the coating temporary storage device comprises a temporary storage tank, a stirring assembly and a viscosity detector, the temporary storage tank comprises a bottom wall, a top wall and a peripheral side wall connected between the bottom wall and the top wall, the bottom wall and the top wall are oppositely arranged, and a containing space is defined by the peripheral side wall, the bottom wall and the top wall; the containing space is used for containing preset slurry, the stirring assembly is arranged in the containing space and used for rotating around the center axis of the buffer tank to stir the preset slurry, the viscosity detector is arranged at the end, close to the bottom wall, of the stirring assembly, and the stirring assembly is used for driving the viscosity detector to rotate. And the viscosity detector is used for detecting the viscosity of the preset slurry in the buffer tank. And the viscosity detector is arranged, so that the viscosity detection control of the preset slurry can be realized before the preset slurry is coated, the influence of the viscosity of the preset slurry on the weight and the size of the battery pole piece in the coating process is avoided, and the risk of conditions such as abnormal quality of the pole piece in the battery preparation process is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery production equipment, and particularly relates to a coating buffer device and a slurry coating equipment. Background Art

[0002] Lithium-ion batteries are widely used in various electronic products due to their excellent cycle performance, rate performance, small size, light weight, and high reliability. With the gradual development of the market, all sectors of society have paid increasing attention to the preparation process of lithium-ion batteries.

[0003] In related technologies, in battery production equipment, a buffer tank needs to be set between a slurry preparation device and a coating device as a transfer station for battery slurry, so that the battery slurry passes through the buffer tank first during the process of being transported from the slurry preparation device to the coating device. The buffer tank can be used as an intermediate storage structural member, which can provide continuity between the slurry preparation and coating processes and balance the rhythm differences on the production line. However, in related technologies, the viscosity of the battery slurry in the buffer tank may change due to reasons such as time or temperature. If the battery slurry in the buffer tank is directly coated onto the electrode current collector, it will pose a quality risk to the battery electrode and affect the production quality and efficiency of the battery. Summary of the Utility Model

[0004] The purpose of the present application is to provide a coating buffer device and a slurry coating equipment to solve the technical problem that directly coating the battery slurry in the buffer tank in related technologies will affect the production quality and efficiency of the battery.

[0005] In a first aspect, the present application provides a coating buffer device, including:

[0006] A buffer tank, including a bottom wall, a top wall, and a peripheral side wall connected between the bottom wall and the top wall. The bottom wall and the top wall are oppositely arranged, and the peripheral side wall, the bottom wall, and the top wall enclose a receiving space for receiving a preset slurry.

[0007] A stirring assembly, disposed in the receiving space, and the stirring assembly is used to rotate around the central axis of the buffer tank to stir the preset slurry; and

[0008] A viscosity detector, the viscosity detector is disposed at one end of the stirring assembly close to the bottom wall, the stirring assembly is used to drive the viscosity detector to rotate, and the viscosity detector is used to detect the viscosity of the preset slurry in the buffer tank.

[0009] In the coating buffer device provided by the present application, the buffer tank includes a bottom wall, a top wall, and a peripheral side wall connected between the bottom wall and the top wall. The peripheral side wall, the bottom wall, and the top wall enclose a receiving space for receiving a preset slurry. A stirring assembly is disposed in the receiving space and is used to rotate around the central axis of the buffer tank to stir the preset slurry. A viscosity detector is disposed at one end of the stirring assembly close to the bottom wall. The stirring assembly is used to drive the viscosity detector to rotate, and the viscosity detector is used to detect the viscosity of the preset slurry in the buffer tank. This enables the detection and control of the viscosity of the preset slurry before coating, avoiding the influence of the viscosity of the preset slurry on the weight and size of the battery electrode sheet during the coating process, and reducing the abnormal quality situation of the battery electrode sheet. Moreover, the stirring assembly and the viscosity detector can share a motor for driving rotation, which can simplify the structure of the coating buffer device while realizing the function of detecting the viscosity of the preset slurry.

[0010] Wherein, the coating buffer device further includes a driving member, and the output shaft of the driving member is respectively connected to the rotating shaft of the stirring assembly and the rotor of the viscosity detector.

[0011] Wherein, the viscosity detector includes an elastic member and a rotor connected to each other. One end of the elastic member is connected to the output shaft of the driving member, and the other end is connected to the rotor. The elastic member is used to convert the resistance of the preset slurry received by the rotor during rotation into its own deformation amount.

[0012] Wherein, the viscosity detector further includes a sensor, and the coating buffer device further includes a controller; the sensor is used to output a deformation electric signal according to the deformation amount of the elastic member, and the controller is used to calculate the viscosity of the preset slurry according to the deformation electric signal.

[0013] Wherein, the stirring assembly includes a rotating shaft, the rotating shaft is arranged along the central axis of the buffer tank, the output shaft of the driving member penetrates through the rotating shaft and is connected to the viscosity detector, and the elastic member of the viscosity detector is arranged between the rotating shaft and the bottom wall.

[0014] Wherein, the stirring assembly includes a rotating shaft, the rotating shaft is arranged along the central axis of the buffer tank, the rotor penetrates through the rotating shaft, and the elastic member of the viscosity detector is arranged at one end of the rotating shaft away from the bottom wall.

[0015] Wherein, the stirring assembly includes at least two stirring members, and each stirring member includes a connecting portion, a side paddle, and a bottom paddle connected in sequence. The connecting portion is arranged adjacent to the top wall, the side paddle is arranged close to the peripheral side wall, at least two side paddles are arranged at intervals along the circumferential direction of the peripheral side wall, the bottom paddle is arranged close to the bottom wall, and one ends of the bottom paddles away from the side paddles are interconnected as a whole; the at least two stirring members are used to rotate around the central axis of the buffer tank to stir the preset slurry.

[0016] In a second aspect, the present application provides a slurry coating device, which includes a slurry preparation device, a coating device, and the coating buffer device. The slurry preparation device is used to prepare the preset slurry, the coating buffer device is used to buffer the preset slurry, and the coating device is used to coat the preset slurry.

[0017] Wherein, the slurry coating device further includes a first conveying component, which is connected between the slurry preparation device and the buffer tank, and the first conveying component is used to convey the preset slurry between the slurry preparation device and the buffer tank;

[0018] The slurry coating device further includes a second conveying component, which is connected between the buffer tank and the coating device, and the second conveying component is used to convey the preset slurry between the buffer tank and the coating device.

[0019] Wherein, the slurry coating device further includes a liquid level detection component, which is used to detect the liquid level of the preset slurry in the buffer tank. The slurry coating device further includes a central controller, which is electrically connected to the liquid level detection component, the first conveying component, and the second conveying component. The central controller is used to control the working states of the first conveying component and the second conveying component according to the detection signal of the liquid level detection component.

[0020] In the slurry coating device provided by the present application, the buffer tank of the coating buffer device includes a bottom wall, a top wall, and a peripheral side wall connecting the bottom wall and the top wall. The peripheral side wall, the bottom wall, and the top wall enclose a receiving space for receiving the preset slurry. The stirring component is arranged in the receiving space and is used to rotate around the central axis of the buffer tank to stir the preset slurry. The viscosity detector is arranged at one end of the stirring component close to the bottom wall. The stirring component is used to drive the viscosity detector to rotate, and the viscosity detector is used to detect the viscosity of the preset slurry in the buffer tank. This enables the viscosity detection and control of the preset slurry before coating, avoiding the influence of the viscosity of the preset slurry on the weight and size of the battery electrode sheet during the coating process, and reducing the abnormal quality situation of the battery electrode sheet. Moreover, the stirring component and the viscosity detector can share a motor for driving rotation, which can simplify the structure of the slurry coating device while realizing the function of detecting the viscosity of the preset slurry. Description of the Drawings

[0021] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0022] Figure 1 is a schematic structural diagram of a coating buffer device provided in Embodiment 1 of the present application Figure 1 ;

[0023] Figure 2 is a schematic structural diagram of a coating buffer device provided in Embodiment 1 of the present application Figure 2 ;

[0024] Figure 3 is a schematic structural diagram of a viscosity detector provided in Embodiment 1 of the present application;

[0025] Figure 4 is a schematic structural diagram of a coating buffer device including a driving member provided in Embodiment 1 of the present application;

[0026] Figure 5 is a schematic structural diagram of a coating buffer device provided in Embodiment 2 of the present application;

[0027] Figure 6 is a schematic structural diagram of a coating buffer device provided in Embodiment 3 of the present application;

[0028] Figure 7 is a schematic structural diagram of a slurry coating device provided in Embodiment 4 of the present application.

[0029] Reference numeral description:

[0030] Slurry coating device - 1000, coating buffer device - 100, buffer tank - 10, stirring assembly - 20, rotating shaft - 21, stirring member - 22, connecting portion - 221, side paddle - 222, bottom paddle - 223, viscosity detector - 30, elastic member - 31, rotor - 32, driving member - 40, slurry preparation device - 200, coating device - 300, first conveying assembly - 400, second conveying assembly - 500. Detailed embodiments

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0032] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0033] In this specification, for convenience, terms indicating orientation or positional relationship such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are used to describe the positional relationship of the constituent elements with reference to the drawings. This is only for the convenience of describing this specification and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the direction of the described constituent elements. Therefore, it is not limited to the terms described in the specification and can be appropriately replaced according to the situation.

[0034] In this specification, unless otherwise clearly specified and limited, the terms "installed", "connected", "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection, or an indirect connection through an intermediate member, or the communication inside two elements. For those of ordinary skill in the art, the meanings of the above terms in the present disclosure can be understood according to the circumstances.

[0035] Lithium-ion batteries are widely used in various electronic products due to their excellent cycle performance, rate performance, small size, light weight, and relatively high reliability. With the gradual development of the market, all sectors of society have paid increasing attention to the preparation process of lithium-ion batteries.

[0036] In the related art, in battery production equipment, a buffer tank needs to be set between the slurry preparation device and the coating device as a transfer station for battery slurry, so that the battery slurry passes through the buffer tank first during the process of being transported from the slurry preparation device to the coating device. The buffer tank can be used as an intermediate storage structural member, which can provide continuity between the slurry preparation and coating processes and balance the rhythm differences on the production line. However, in the related art, the viscosity of the battery slurry in the buffer tank may change due to reasons such as time or temperature. If the battery slurry in the buffer tank is directly coated onto the electrode current collector, it will pose a quality risk to the battery electrode and affect the production quality and efficiency of the battery.

[0037] Please refer to Figure 1 , Figure 1 which is a schematic structure of a coating buffer device provided in Embodiment 1 of this application. Figure 1 .

[0038] The present application provides a coating buffer device 100 to solve the technical problem in the related art that directly coating the battery slurry in the buffer tank will affect the production quality and efficiency of the battery.

[0039] The coating buffer device 100 includes a buffer tank 10, a stirring component 20, and a viscosity detector 30. The buffer tank 10 includes a bottom wall, a top wall, and a peripheral side wall connected between the bottom wall and the top wall. The bottom wall and the top wall are arranged opposite to each other. The peripheral side wall, the bottom wall, and the top wall are surrounded by a receiving space, and the receiving space is used to receive a preset slurry. The stirring component 20 is arranged in the receiving space, and the stirring component 20 is used to rotate around the central axis of the buffer tank 10 to stir the preset slurry. The viscosity detector 30 is arranged at one end of the stirring component 20 close to the bottom wall, and the stirring component 20 is used to drive the viscosity detector 30 to rotate, and the viscosity detector 30 is used to detect the viscosity of the preset slurry in the buffer tank 10.

[0040] The coating cache device 100 provided in this embodiment includes a cache tank 10, and the cache tank 10 is used to accommodate the preset slurry, the stirring assembly 20, the viscosity detector 30 and other components. The shape of the cache tank 10 includes but is not limited to a cylindrical shape, a rectangular shape or other shapes. The present application uses the shape of the cache tank 10 as a cylindrical shape as an example, which should not be understood as a limitation on the present application. The shape of the cache tank 10 is cylindrical, and the cache tank 10 includes a central axis, which is the central axis of the cylinder (as shown in the figure, Figure 1 The dotted line portion α is the central axis of the cache tank 10).

[0041] It should be noted that, in the present embodiment, a discharge port is provided at the center of the bottom wall of the cache tank 10, and the bottom wall of the cache tank 10 has an inclined surface, one end of the inclined surface is connected to the side wall of the cache tank 10, and the other end extends to the central discharge port of the cache tank 10, and the end of the inclined surface away from the discharge port is higher. The inclined surface is arranged on the bottom wall of the cache tank 10 to form a funnel-like shape, which facilitates the preset slurry in the cache tank 10 to flow out from the discharge port, and can avoid a large amount of the preset slurry remaining on the bottom wall of the cache tank 10, thereby improving the utilization rate of the preset slurry.

[0042] In this embodiment, the preset slurry is electrode slurry. In other embodiments, the preset slurry may also be other materials, which is not limited in this application.

[0043] Please refer to Figure 1 and Figure 2 , Figure 2Schematic structure of a coating buffer device provided in Embodiment 1 of the present application Figure 2 The coating buffer device 100 provided in this embodiment further includes a stirring assembly 20 for stirring the preset slurry. The stirring assembly 20 includes a rotating shaft 21 disposed along the central axis of the buffer tank 10. The stirring assembly 20 further includes at least two stirring members 22, each stirring member 22 including a connecting portion 221, a side paddle 222, and a bottom paddle 223 connected in sequence. The connecting portion 221 is disposed adjacent to the top wall, the side paddle 222 is disposed close to the peripheral side wall, at least two side paddles 222 are circumferentially spaced along the peripheral side wall, the bottom paddle 223 is disposed close to the bottom wall, and one ends of the respective bottom paddles 223 facing away from the side paddles 222 are interconnected as a whole; the at least two stirring members 22 are configured to rotate around the central axis of the buffer tank 10 to stir the preset slurry.

[0044] When the stirring member 22 of the stirring assembly 20 rotates around the central axis of the buffer tank 10, it can scrape off the preset slurry adhering to the inner wall of the buffer tank 10 and provide a stirring centripetal force for the preset slurry. In other words, the stirring member 22 can scrape off the preset slurry, stir the preset slurry, and push the preset slurry from the edge area of the buffer tank 10 to the middle area of the buffer tank 10 for cyclic stirring to prevent phenomena such as precipitation of the preset slurry. Optionally, the number of the stirring members 22 is 2 - 8. For example, the number of the stirring members 22 can be 2, or 3, or 4, or 5, or 6, or 7, or 8, or other numbers. In this application, the number of the stirring members 22 is taken as 3 for illustration, which should not be construed as a limitation to this application. Among them, the stirring member 22 is composed of the connecting portion 221, the side paddle 222, and the bottom paddle 223. Optionally, the connecting portion 221, the side paddle 222, and the bottom paddle 223 include, but are not limited to, an integrally formed structure.

[0045] Among them, the connecting portion 221 is disposed adjacent to the top wall, which can prevent the connecting portion 221 from contacting the preset slurry to reduce the stirring resistance, and further improve the stirring stability of the stirring assembly 20. Among them, the stirring resistance refers to the rotational resistance of the stirring assembly 20 rotating around the central axis of the buffer tank 10. One end of the connecting portion 221 is connected to the side paddle 222, and the other end of the connecting portion 221 is connected to the rotating shaft 21. The side paddle 222 is disposed close to the circumferential side wall. The side paddle 222 can not only provide the stirring centripetal force for the preset slurry, but also scrape the preset slurry adhering to the inner wall of the buffer tank 10. Optionally, the distance between the side paddle 222 and the circumferential side wall is 1 mm - 10 mm. The bottom paddle 223 can provide an upward thrust for the preset slurry. The bottom paddle 223 and the side paddle 222 cooperate with each other to realize the stirring of the preset slurry in all directions, and improve the stirring effect of the coating buffer device 100. Optionally, the distance between the bottom paddle 223 and the bottom wall is 1 mm - 10 mm.

[0046] Specifically, one ends of the bottom paddles 223 in the present embodiment, which are away from the side paddle 222, are interconnected as a whole. Optionally, each of the bottom paddles 223 extends towards the central axis of the buffer tank 10 and is connected as a whole. Such a setting can provide a supporting force for the stirring assembly 20 during rotation, keep the distance between adjacent stirring members 22 fixed, and further ensure that at least two stirring members 22 maintain their shapes during stirring, making the overall structure of the stirring assembly 20 more stable, improving the stability of the stirring assembly 20, and reducing the probability of deformation of the stirring assembly 20. Moreover, in the present embodiment, by connecting the bottoms as a whole, the stirring effect of the stirring member 22 on the preset slurry can also be improved, thereby improving the storage and stirring effect of the coating buffer device 100.

[0047] The coating buffer device 100 provided in the present embodiment further includes the viscosity detector 30. The viscosity detector 30 is coaxially disposed with the rotating shaft 21 of the stirring assembly 20, and the viscosity detector 30 is connected to the stirring assembly 20. The stirring assembly 20 can be used to drive the viscosity detector 30 to rotate and detect the viscosity of the preset slurry in the buffer tank 10. The viscosity detector 30 can be used to detect the viscosity of the preset slurry in the buffer tank 10, so as to realize the viscosity detection and control of the preset slurry before coating. At the same time, the parameters of the preset slurry during coating can be adjusted, avoiding the influence of the viscosity of the preset slurry on the weight and size of the battery electrode plate during the coating process, reducing the abnormal quality conditions of the battery electrode plate, and improving the production quality and efficiency of the battery.

[0048] Further, it should be noted that the viscosity detector 30 is coaxially arranged with the stirring assembly 20, and the stirring assembly 20 drives the viscosity detector 30 to rotate, that is, the rotation speed of the stirring assembly 20 is equal to the rotation speed of the viscosity detector 30. The stirring assembly 20 drives the viscosity detector 30 to rotate. In other words, the stirring assembly 20 and the viscosity detector 30 can share a driving motor for rotation, which can simplify the structure of the coating buffer device 100 while realizing the function of detecting the viscosity of the preset slurry.

[0049] In the coating buffer device 100 provided by the present application, the buffer tank 10 includes a bottom wall, a top wall, and a peripheral side wall connected between the bottom wall and the top wall. The peripheral side wall, the bottom wall, and the top wall enclose a receiving space for receiving the preset slurry. The stirring assembly 20 is arranged in the receiving space and is used to rotate around the central axis of the buffer tank 10 to stir the preset slurry. The viscosity detector 30 is arranged at one end of the stirring assembly 20 close to the bottom wall. The stirring assembly 20 is used to drive the viscosity detector 30 to rotate, and the viscosity detector 30 is used to detect the viscosity of the preset slurry in the buffer tank 10. This enables the detection and control of the viscosity of the preset slurry before coating, avoiding the influence of the viscosity of the preset slurry on the weight and size of the battery electrode sheet during the coating process, and reducing the abnormal quality situation of the battery electrode sheet. Moreover, the stirring assembly 20 and the viscosity detector 30 can share a driving motor for rotation, which can simplify the structure of the coating buffer device 100 while realizing the function of detecting the viscosity of the preset slurry.

[0050] Please refer to Figure 3 , Figure 3 FIG. is a schematic structural diagram of a viscosity detector provided in Embodiment 1 of the present application. In one embodiment, the viscosity detector 30 includes an elastic member 31 and a rotor 32 connected to each other. One end of the elastic member 31 is connected to the output shaft of the driving member 40, and the other end is connected to the rotor 32. The elastic member 31 is used to convert the resistance of the preset slurry received when the rotor 32 rotates into its own deformation amount.

[0051] Among them, the elastic member 31 is a hairspring in the viscosity detector 30, and the elastic member 31 includes, but is not limited to, elastic structural members such as springs.

[0052] In one embodiment, the viscosity detector 30 further includes a sensor, and the coating buffer device 100 further includes a controller; the sensor is used to output a deformation electric signal according to the deformation amount of the elastic member 31, and the controller is used to calculate the viscosity of the preset slurry according to the deformation electric signal.

[0053] Specifically, in one embodiment, a corresponding sensing element may also be provided on the output shaft of the driving member 40. The sensor outputs a deformed electric signal according to the electrical cooperation with the sensing element, and the controller calculates the concentration of the preset slurry according to the deformed electric signal.

[0054] Please refer to Figure 4 , Figure 4 FIG. is a schematic structural diagram of a coating buffer device including a driving member provided in Embodiment 1 of the present application. In one embodiment, the coating buffer device 100 further includes the driving member 40. The output shaft of the driving member 40 is connected to the rotating shaft 21 of the stirring assembly 20. The rotor 32 of the viscosity detector 30 is connected to the rotating shaft 21 of the stirring assembly 20, and a sensing element cooperating with the sensor is provided on the rotating shaft 21 of the stirring assembly 20.

[0055] Please refer to Figure 5 and Figure 6 , Figure 5 is a schematic structural diagram of a coating buffer device provided in Embodiment 2 of the present application. Figure 6 FIG. is a schematic structural diagram of a coating buffer device provided in Embodiment 3 of the present application. In one embodiment, the coating buffer device 100 further includes the driving member 40. The output shaft of the driving member 40 is respectively connected to the rotating shaft 21 of the stirring assembly 20 and the rotor 32 of the viscosity detector 30.

[0056] Specifically, please refer to Figure 5 , in one embodiment, the output shaft of the driving member 40 penetrates through the rotating shaft 21 and is connected to the viscosity detector 30. The elastic member 31 of the viscosity detector 30 is disposed between the rotating shaft 21 and the bottom wall.

[0057] Further, please refer to Figure 6 , in one embodiment, the rotor 32 penetrates through the rotating shaft 21, and the elastic member 31 of the viscosity detector 30 is disposed at one end of the rotating shaft 21 away from the bottom wall.

[0058] Please refer to Figure 7 , Figure 7 FIG. is a schematic structural diagram of a slurry coating device provided in Embodiment 4 of the present application. The present application further provides a slurry coating device 1000. The slurry coating device 1000 includes a slurry preparation device 200, a coating device 300, and the above-mentioned coating buffer device 100. The slurry preparation device 200 is used to prepare the preset slurry, the coating buffer device 100 is used to buffer the preset slurry, and the coating device 300 is used to coat the preset slurry.

[0059] The coating buffer device 100 is arranged between the slurry preparation device 200 and the coating device 300. The coating buffer device 100 can further mix and homogenize the preset slurry to ensure its uniformity before the preset slurry is coated. As an intermediate storage station, the coating buffer device 100 can provide continuity between the slurry preparation and coating processes and balance the rhythm differences on the production line. During production, the coating buffer device 100 can adjust the supply amount of the preset slurry to adapt to the change of the coating speed. If a fault occurs or shutdown is required during the coating process, the coating buffer device 100 can temporarily store the excess preset slurry to avoid waste. The coating buffer device 100 can be used as an inspection point to detect key parameters such as the viscosity and solid content of the preset slurry.

[0060] In the slurry coating equipment 1000 provided by the present application, the buffer tank 10 of the coating buffer device 100 includes a bottom wall, a top wall, and a peripheral side wall connected between the bottom wall and the top wall. The peripheral side wall and the bottom wall and the top wall enclose a receiving space for receiving the preset slurry. The stirring assembly 20 is arranged in the receiving space and is used to rotate around the central axis of the buffer tank 10 to stir the preset slurry. The viscosity detector 30 is arranged at one end of the stirring assembly 20 close to the bottom wall. The stirring assembly 20 is used to drive the viscosity detector 30 to rotate, and the viscosity detector 30 is used to detect the viscosity of the preset slurry in the buffer tank 10. This enables the detection and control of the viscosity of the preset slurry before the preset slurry is coated, avoids the influence of the viscosity of the preset slurry on the weight and size of the battery electrode plate during the coating process, and reduces the abnormal quality situation of the battery electrode plate. Moreover, the stirring assembly 20 and the viscosity detector 30 can share a motor for driving rotation, which can simplify the structure of the slurry coating equipment 1000 and realize the function of detecting the viscosity of the preset slurry at the same time.

[0061] Please refer to Figure 7 , in an embodiment, the slurry coating equipment 1000 further includes a first conveying assembly 400. The first conveying assembly 400 is connected between the slurry preparation device 200 and the buffer tank 10, and the first conveying assembly 400 is used to convey the preset slurry between the slurry preparation device 200 and the buffer tank 10.

[0062] The slurry coating equipment 1000 further includes a second conveying assembly 500. The second conveying assembly 500 is connected between the buffer tank 10 and the coating device 300, and the second conveying assembly 500 is used to convey the preset slurry between the buffer tank 10 and the coating device 300.

[0063] Specifically, a feed inlet is provided on the side wall of the buffer tank 10, and a discharge outlet is provided on the bottom wall of the buffer wall. The first conveying assembly 400 is connected to the feed inlet to convey a preset slurry into the buffer tank 10; the second conveying assembly 500 is connected to the discharge outlet to convey the preset slurry in the buffer tank 10 to the coating device 300 for coating.

[0064] Generally, the preset slurry has a certain viscosity, and the conveying speed is limited when relying on gravity for conveying. Therefore, both the first conveying assembly 400 and the second conveying assembly 500 generally include a power device and a conveying pipeline. Among them, the conveying pipeline of the first conveying assembly 400 is connected between the feed inlet and the slurry preparation device 200, and the conveying pipeline of the second conveying assembly 500 is connected between the discharge outlet and the coating device 300. By setting the first conveying assembly 400 and the second conveying assembly 500, the preset slurry can be conveyed separately, and the operation is convenient.

[0065] In an embodiment, the slurry coating equipment 1000 further includes a liquid level detection assembly for detecting the liquid level of the preset slurry in the buffer tank 10. The slurry coating equipment 1000 further includes a central controller, which is electrically connected to the liquid level detection assembly, the first conveying assembly 400, and the second conveying assembly 500. The central controller is used to control the working states of the first conveying assembly 400 and the second conveying assembly 500 according to the detection signal of the liquid level detection assembly.

[0066] The liquid level detection assembly is a component for detecting the liquid level of the slurry in the buffer tank 10, and it can be a conventional liquid level detection component. The liquid level detection assembly can be installed on the top wall or the peripheral side wall of the buffer tank 10. By setting the liquid level detection assembly, the liquid level of the preset slurry in the buffer tank 10 can be obtained, so as to monitor the liquid level of the preset slurry.

[0067] The central controller is used to control the working states of the first conveying assembly 400 and the second conveying assembly 500 according to the detection signal of the liquid level detection assembly. Specifically, the central controller can be used to control the first conveying assembly 400 and the second conveying assembly 500 to convey or stop conveying according to the detection signal of the liquid level detection assembly.

[0068] As used herein, the terms "embodiment" and "implementation" mean that the specific features, structures, or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. 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. Those skilled in the art will explicitly and implicitly understand that the embodiments described in the present application may be combined with other embodiments. In addition, it should also be understood that the features, structures, or characteristics described in the embodiments of the present application may be arbitrarily combined with each other without contradiction to form another embodiment that does not depart from the spirit and scope of the technical solution of the present application.

[0069] The above are some implementation manners of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present application.

Claims

1. A coating buffer device, characterized in that: include: A buffer tank, comprising a bottom wall, a top wall and a peripheral side wall connected between the bottom wall and the top wall, wherein the bottom wall and the top wall are arranged opposite to each other, and the peripheral side wall, the bottom wall and the top wall are arranged to form a receiving space, and the receiving space is used to receive a preset slurry; A stirring component is disposed in the receiving space, and is used to rotate around the central axis of the buffer tank to stir the preset slurry; as well as A viscosity detector is provided at one end of the stirring component close to the bottom wall, the stirring component is used to drive the viscosity detector to rotate, and the viscosity detector is used to detect the viscosity of the preset slurry in the buffer tank.

2. The coating buffer device according to claim 1, characterized in that: The coating buffer device also includes a driving member, and an output shaft of the driving member is respectively connected to the rotating shaft of the stirring assembly and the rotor of the viscosity detector.

3. The coating buffer device according to claim 2, characterized in that: The viscosity detector includes a connected elastic member and a rotor, one end of the elastic member is connected to the output shaft of the driving member, and the other end is connected to the rotor. The elastic member is used to convert the resistance of the preset slurry encountered by the rotor when it rotates into its own deformation.

4. The coating buffer device according to claim 3, characterized in that: The viscosity detector further includes a sensor, and the coating buffer device further includes a controller; the sensor is used to output a deformation electrical signal according to the deformation amount of the elastic member, and the controller is used to calculate the viscosity of the preset slurry according to the deformation electrical signal.

5. The coating buffer device according to claim 3, characterized in that: The stirring assembly includes a rotating shaft, which is arranged along the central axis of the cache tank. The output shaft of the driving member passes through the rotating shaft and is connected to the viscosity detector. The elastic member of the viscosity detector is arranged between the rotating shaft and the bottom wall.

6. The coating buffer device according to claim 3, characterized in that: The stirring assembly includes a rotating shaft, which is arranged along the central axis of the buffer tank. The rotor passes through the rotating shaft, and the elastic member of the viscosity detector is arranged at one end of the rotating shaft away from the bottom wall.

7. The coating buffer device according to claim 1, characterized in that: The stirring assembly includes at least two stirring members, and the stirring member includes a connecting portion, a side paddle and a bottom paddle connected in sequence, the connecting portion is arranged adjacent to the top wall, the side paddle is arranged close to the peripheral side wall, at least two of the side paddles are arranged at intervals along the circumferential direction of the peripheral side wall, and the bottom paddle is arranged close to the bottom wall, and the ends of each bottom paddle facing away from the side paddle are interconnected as a whole; the at least two stirring members are used to rotate around the central axis of the buffer tank to stir the preset slurry.

8. A slurry coating device, characterized in that: It comprises a slurry preparation device, a coating device and a coating buffer device as described in any one of claims 1 to 7, wherein the slurry preparation device is used to prepare the preset slurry, the coating buffer device is used to buffer the preset slurry, and the coating device is used to coat the preset slurry.

9. The slurry coating equipment according to claim 8, characterized in that: The slurry coating device further includes a first conveying component, which is connected between the slurry preparation device and the buffer tank, and is used to convey the preset slurry between the slurry preparation device and the buffer tank; The slurry coating equipment also includes a second conveying component, which is connected between the buffer tank and the coating device, and is used to convey the preset slurry between the buffer tank and the coating device.

10. The slurry coating equipment according to claim 9, characterized in that: The slurry coating equipment also includes a liquid level detection component, which is used to detect the liquid level of the preset slurry in the buffer tank. The slurry coating equipment also includes a central controller, which is electrically connected to the liquid level detection component, the first conveying component and the second conveying component. The central controller is used to control the working status of the first conveying component and the second conveying component according to the detection signal of the liquid level detection component.

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