Control device for improving coating consistency

Abstract

The utility model discloses a control device for improving coating consistency, which comprises a slurry stirring tank, a slurry storage tank and a coating machine which are sequentially connected, a slurry temperature control mechanism is arranged between the slurry stirring tank and the slurry storage tank, and the slurry temperature control mechanism is used for cooling slurry conveyed by the slurry stirring tank. The temperature of the slurry at the machine head and the machine tail of the coating machine is kept at the set temperature; the slurry temperature control mechanism comprises a cooling assembly and a temperature detection assembly, the cooling assembly is used for cooling slurry pumped out by the slurry stirring tank, and the temperature detection assembly is used for detecting the temperature of the slurry in real time. The control device provided by the utility model comprises the slurry temperature control mechanism, and the slurry temperature control mechanism is arranged to keep the slurry at the head and the tail of the coating machine at the optimal coating temperature of 25 + / -3 DEG C, so that the influence on the density of a coating surface due to overhigh slurry discharge temperature and large temperature difference of the slurry at the head and the tail of the coating machine is avoided; and thus, the slurry coating consistency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing devices, and in particular to a control device for improving coating consistency. Background Art

[0002] In the process of manufacturing pole pieces in the front process of power battery manufacturing, the main material, auxiliary material and solvent need to be mixed, stirred and dispersed, and then a stable suspension slurry is formed and then sent to the head and tail of the coating machine through a pipeline for spraying. In this process, the viscosity, solid content, fineness and other factors of the slurry will affect the surface density COV of the coating spray, and then affect the coating consistency, resulting in the local N / P of the positive and negative pole pieces being too low, and there is a risk of lithium precipitation. The battery slurry coating process in the prior art includes the following steps: After the slurry is made, the slurry is immediately pumped to the transfer storage tank through a diaphragm pump for slurry mixing to improve the consistency of the solid content and fineness of the slurry, and when the slurry is needed for coating, it is immediately sent to the head and tail of the coating machine for spraying. However, in the prior art, during the coating process, the time when the slurry arrives at the coating machine is inconsistent and the discharge temperature of the slurry is high, up to 40°C or more, resulting in a temperature difference of 20-50°C between the head and tail of the coating machine, which has a greater impact on the consistency of the slurry coating. Therefore, it is necessary to provide a device that can improve the coating consistency of battery slurry. Utility Model Content

[0003] The purpose of the utility model is to solve the above problems and provide a control device for improving coating consistency; the control device can ensure the consistency of the temperature of the slurry during coating, thereby improving the lateral and longitudinal surface density OCV of the slurry coating and improving the coating consistency.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0005] A control device for improving coating consistency, comprising a slurry stirring tank, a slurry storage tank and a coater connected in sequence, a slurry temperature control mechanism is provided between the slurry stirring tank and the slurry storage tank, the slurry temperature control mechanism is used to cool the slurry delivered by the slurry stirring tank, so that the slurry temperature at the head and tail of the coater is maintained at a set temperature; the slurry temperature control mechanism comprises a cooling component and a temperature detection component, the cooling component is used to cool the slurry pumped out of the slurry stirring tank, and the temperature detection component is used to detect the slurry temperature in real time.

[0006] Preferably, the cooling assembly includes a cooling pipe provided with a cooling medium and a cooling medium circulation assembly connected to the cooling pipe.

[0007] Preferably, the slurry stirring tank comprises a first slurry stirring tank and a second slurry stirring tank for stirring positive and negative electrode slurries, respectively, and the first slurry stirring tank and the second slurry stirring tank are respectively connected to the slurry storage tank.

[0008] Preferably, the slurry temperature control mechanism is arranged in the slurry stirring tank, and the slurry temperature control mechanism performs secondary stirring on the slurry after the stirring process in the slurry stirring tank is completed, and cools the slurry at the same time, and then transports the cooled slurry to the slurry storage tank.

[0009] Preferably, the stirring speed of the secondary stirring is lower than the stirring speed of the stirring step.

[0010] Preferably, the control device further includes a slurry transfer tank disposed between the slurry stirring tank and the slurry storage tank; the slurry temperature control mechanism is disposed in the slurry transfer tank, and the slurry transfer tank further includes a stirring mechanism.

[0011] Preferably, the stirring speed of the stirring mechanism is lower than the stirring speed of the slurry stirring tank.

[0012] Preferably, the slurry transfer tank includes a first slurry transfer tank and a second slurry transfer tank respectively connected to the first slurry stirring tank and the second slurry stirring tank, and the first slurry transfer tank and the second slurry transfer tank are respectively connected to the slurry storage tank.

[0013] The beneficial effects of the utility model include at least:

[0014] The utility model discloses a control device for improving coating consistency, wherein the control device includes a slurry temperature control mechanism disposed between the slurry stirring tank and the slurry storage tank. The slurry temperature control mechanism is used to maintain the head and tail slurries of the coater at an optimal coating temperature of 25±3°C, thereby avoiding the effects of excessively high slurry discharge temperature and large slurry temperature difference between the head and tail of the coater on coating surface density, thereby improving the consistency of slurry coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the control device for improving coating consistency described in Example 1 of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the control device for improving coating consistency described in Example 2 of the utility model.

[0017] Among them, 1-slurry stirring tank, 11-first slurry stirring tank, 12-second slurry stirring tank, 2-slurry storage tank, 3-coating machine, 4-slurry transfer tank, 41-first slurry transfer tank, 42-second slurry transfer tank. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0019] In the present utility model, descriptions such as “first”, “second”, etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features.

[0020] Example 1

[0021] This embodiment provides a control device for improving coating consistency. Preferably, the control device is used in the production process of pole pieces for power battery manufacturing; see Figure 1 As shown, the control device includes a slurry stirring tank 1, a slurry storage tank 2 and a coating machine 3 which are connected in sequence. A slurry temperature control mechanism is provided between the slurry stirring tank 1 and the slurry storage tank 2. The slurry temperature control mechanism is used to cool the slurry delivered by the slurry stirring tank so that the slurry temperature at the head and tail of the coating machine 3 is maintained at a set temperature; the slurry temperature control mechanism includes a cooling component and a temperature detection component. The cooling component is used to cool the slurry pumped out of the slurry stirring tank 1, and the temperature detection component is used to detect the slurry temperature in real time.

[0022] The utility model discloses a control device for improving coating consistency, wherein the control device includes a slurry temperature control mechanism arranged between the slurry stirring tank 1 and the slurry storage tank 2, and the slurry at the head and tail of the coater 3 is maintained at the optimal coating temperature of 25±3°C through the slurry temperature control mechanism, thereby avoiding the influence of excessively high slurry discharge temperature and large temperature difference of the slurry at the head and tail of the coater 3 on the coating surface density, thereby improving the consistency of slurry coating.

[0023] The set temperature is the optimal temperature for slurry coating, 25±3°C.

[0024] The cooling assembly includes a cooling pipe provided with a cooling medium and a cooling medium circulation assembly connected to the cooling pipe. The cooling medium is preferably water, and the cooling medium circulation assembly includes a circulating water pump.

[0025] In this embodiment, the slurry stirring tank 1 includes a first slurry stirring tank 11 and a second slurry stirring tank 12 for stirring positive and negative electrode slurries, respectively, and the first slurry stirring tank 11 and the second slurry stirring tank 12 are respectively connected to the slurry storage tank 2. It can be understood that the number of the first slurry stirring tank 11 and the second slurry stirring tank 12 is at least 1, and the specific number can be set according to actual conditions.

[0026] In this embodiment, the slurry temperature control mechanism is arranged in the slurry stirring tank 1. After the stirring process in the slurry stirring tank 1 is completed, the slurry temperature control mechanism performs secondary stirring on the slurry while cooling it, and then transports the cooled slurry to the slurry storage tank 2.

[0027] The stirring speed of the secondary stirring is less than the stirring speed of the stirring process. In this embodiment, the slurry temperature control mechanism is arranged in the slurry stirring tank 1. After the stirring process is completed, the slurry temperature control mechanism directly stirs the slurry slowly in the slurry stirring tank 1. At the same time, the cooling component cools the slurry before conveying the slurry to the slurry storage tank 2, so that the slurry at the head and tail of the coating machine 3 is maintained at the optimal coating temperature of 25±3°C, reducing the slurry temperature difference at the head and tail of the coating machine 3, thereby improving the slurry coating surface density and improving the consistency of slurry coating.

[0028] Example 2

[0029] This embodiment provides another control device for improving coating consistency. Compared with embodiment 1, the difference of embodiment 2 is that the specific setting of the slurry temperature control mechanism is different. Specifically, the control device in this embodiment also includes a slurry transfer tank 4 arranged between the slurry stirring tank 1 and the slurry storage tank 2; the slurry temperature control mechanism is arranged in the slurry transfer tank 4, and the slurry transfer tank 4 also includes a stirring mechanism.

[0030] In the present embodiment, a slurry transfer tank 4 is arranged between the slurry stirring tank 1 and the slurry storage tank 2. When in use, after the slurry stirring tank 1 completes the stirring process, the slurry is transported to the slurry transfer tank 4. The slurry transfer tank 4 stirs and cools the slurry through the stirring mechanism and the slurry temperature control mechanism, so that the slurry temperature at the head and tail of the coating machine 3 is maintained at the optimal coating temperature of 25±3°C, thereby reducing the slurry temperature difference between the head and tail of the coating machine 3, thereby improving the slurry coating surface density and improving the consistency of slurry coating; in addition, compared with Example 1, the control device described in this embodiment externalizes the slurry temperature control mechanism in the slurry transfer tank 4, thereby achieving the condition of controlling the slurry temperature while avoiding the increase in the stirring process time and the reduction in the single tank production capacity.

[0031] The stirring speed of the stirring mechanism is lower than the stirring speed of the slurry stirring tank 1 .

[0032] Specifically, the slurry transfer tank 4 includes a first slurry transfer tank 41 and a second slurry transfer tank 42 respectively connected to the first slurry stirring tank 11 and the second slurry stirring tank 12 , and the first slurry transfer tank 41 and the second slurry transfer tank 42 are respectively connected to the slurry storage tank 2 .

[0033] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A control device for improving coating consistency, characterized in that: It includes a slurry stirring tank, a slurry storage tank and a coating machine which are connected in sequence. A slurry temperature control mechanism is provided between the slurry stirring tank and the slurry storage tank. The slurry temperature control mechanism is used to cool the slurry delivered by the slurry stirring tank so that the slurry temperature at the head and tail of the coating machine is maintained at a set temperature. The slurry temperature control mechanism includes a cooling component and a temperature detection component. The cooling component is used to cool the slurry pumped out of the slurry stirring tank, and the temperature detection component is used to detect the slurry temperature in real time.

2. The control device according to claim 1, characterized in that: The cooling assembly includes a cooling pipe provided with a cooling medium and a cooling medium circulation assembly connected to the cooling pipe.

3. The control device according to claim 1, characterized in that: The slurry stirring tank comprises a first slurry stirring tank and a second slurry stirring tank respectively used for stirring positive electrode slurry and negative electrode slurry, and the first slurry stirring tank and the second slurry stirring tank are respectively connected to the slurry storage tank.

4. The control device according to claim 3, characterized in that: The slurry temperature control mechanism is arranged in the slurry stirring tank. After the stirring process of the slurry stirring tank is completed, the slurry temperature control mechanism performs secondary stirring on the slurry and cools it at the same time, and then transports the cooled slurry to the slurry storage tank.

5. The control device according to claim 4, characterized in that: The stirring speed of the secondary stirring is lower than the stirring speed of the stirring step.

6. The control device according to claim 3, characterized in that: The control device also includes a slurry transfer tank disposed between the slurry stirring tank and the slurry storage tank; the slurry temperature control mechanism is disposed in the slurry transfer tank, and the slurry transfer tank also includes a stirring mechanism.

7. The control device according to claim 6, characterized in that: The stirring speed of the stirring mechanism is lower than the stirring speed of the slurry stirring tank.

8. The control device according to claim 7, characterized in that: The slurry transfer tank includes a first slurry transfer tank and a second slurry transfer tank respectively connected to the first slurry stirring tank and the second slurry stirring tank, and the first slurry transfer tank and the second slurry transfer tank are respectively connected to the slurry storage tank.

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