Pre-coating slurry premixing system

Abstract

The utility model discloses a pre-coating slurry premixing system, and belongs to the technical field of battery production, the pre-coating slurry premixing system comprises a feeding device, the feeding device is communicated with a first-stage premixing device and a second-stage premixing device, and the first-stage premixing device is communicated with the second-stage premixing device; the primary premixing device comprises a mixed material buffer tank, the lower end of the mixed material buffer tank is connected with a supporting assembly, a mixed material motor is arranged above the mixed material buffer tank, an output shaft of the mixed material motor is connected with a stirring assembly extending into the mixed material buffer tank, and the stirring assembly is used for stirring and mixing slurry in the mixed material buffer tank. According to the invention, the problems of slurry loss and productivity loss caused by coating and discharging when the index of the supplied material has deviation before coating are solved.

Description

Technical Field

[0001] This utility model belongs to the field of battery production technology, specifically relating to a premixing system for slurry before coating. Background Technology

[0002] In battery production, the uniformity of the areal density of the coated electrodes is crucial, directly impacting the battery's electrical performance. Besides the performance of the coating equipment and the skill level of the coating personnel, the most significant factor influencing the uniformity of the coating areal density and the stability of the slurry.

[0003] The stability of the slurry is mainly affected by the coating fluctuations caused by the differences in the properties of different slurries during the coating process. If the solid content deviation of the slurry exceeds a certain value, the coating machine equipment needs to be adjusted accordingly, such as adjusting the pump speed, oven temperature, and air frequency. In addition to delaying production efficiency, the adjustment process is prone to producing defective electrode sheets, resulting in a loss of yield.

[0004] Therefore, before coating, coating personnel will perform pre-coating material discharge and circulation processing based on the differences in the indicators between the incoming slurry materials to reduce the impact caused by the differences in slurry indicators. However, the corresponding material discharge process will waste production efficiency and slurry loss. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a premixing system for slurry before coating, which solves the problems mentioned in the background art.

[0006] The purpose of this utility model is achieved as follows: a premixing system for slurry before coating, comprising a feeding device, wherein the feeding device is connected to a primary premixing device and a secondary premixing device, and the primary premixing device is connected to the secondary premixing device; the primary premixing device includes a mixing buffer tank, the lower end of the mixing buffer tank is connected to a support assembly, a mixing motor is disposed above the mixing buffer tank, and the output shaft of the mixing motor is connected to a stirring assembly extending into the mixing buffer tank, the stirring assembly being used to stir and mix the slurry in the mixing buffer tank.

[0007] Furthermore, the secondary premixing device includes a premixing chamber connected to a rotor pump. The inlet of the premixing chamber is connected to an intermediate pipe, the other end of which is connected to the mixing buffer tank. The outlet of the premixing chamber is connected to a circulation pipe, the other end of which is connected to the mixing buffer tank. The premixing chamber is used for high-speed mixing of the slurry, and the mixed slurry is returned to the mixing buffer tank via the circulation pipe, thereby achieving complete mixing of the slurry.

[0008] Furthermore, the feeding device includes a feeding pipe, one end of which is connected to a feeding motor, and the upper side wall of the feeding pipe is provided with a feeding port. The other end of the feeding pipe is connected to a conduit, and the other end of the conduit is connected to the mixing buffer tank. Because the power setting of the feeding motor varies, the amount of slurry input through the feeding port varies, thereby achieving feeding ratio adjustment and control.

[0009] Furthermore, the feeding pipe includes a first pipe, a second pipe, and a third pipe. One end of each of the first, second, and third pipes is connected to the conduit, and the other end of the conduit is detachably connected to the upper end of the mixing buffer tank. The intermediate pipe is provided with a sampling port, and the side wall of the mixing buffer tank is connected to a discharge pipe. The mixed slurry can be sampled through the sampling port to test whether it meets the standards. The slurry that meets the standards is then connected to the coating process through the discharge pipe for feeding and coating.

[0010] The beneficial effects of this invention are: 1. It enables premixing of the slurry before coating, reducing fluctuations in the solid content of the slurry used for coating. 2. The premixing ratio can be adjusted and controlled according to actual needs. 3. Stirring and circulating backflow methods achieve thorough and uniform mixing of the slurry. 4. The adjustment of the feeding ratio is not limited to devices such as motors and pumps. 5. It is not limited by the number of feed inlets. It solves the problem of slurry loss and production capacity loss caused by material discharge during coating when there are deviations in the incoming material specifications before coating. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] In the diagram: 1. Mixing buffer tank; 2. Support assembly; 3. Mixing motor; 4. Premixing chamber; 5. Rotary pump; 6. Intermediate pipe; 7. Circulation pipe; 8. Feeding pipe; 9. Feeding motor; 10. Conduit; 11. Sampling port; 12. Discharge pipe. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings. It should be noted that all directional terms such as up, down, front, back, left, and right appearing in the present invention are not intended to limit the present invention, but are only used to more clearly explain and interpret the present invention. Example 1

[0014] like Figure 1As shown, this embodiment discloses a premixing system for slurry before coating, which includes a feeding device connected to a primary premixing device and a secondary premixing device, and the primary premixing device is connected to the secondary premixing device. The primary premixing device includes a mixing buffer tank 1, with a support component 2 connected to the lower end of the mixing buffer tank 1. A mixing motor 3 is installed above the mixing buffer tank 1, and the output shaft of the mixing motor 3 is connected to a stirring component extending into the mixing buffer tank 1. The stirring component is used to stir and mix the slurry in the mixing buffer tank 1. This solves the problem of slurry loss and production capacity loss caused by coating discharge when there are deviations in the incoming material indicators before coating. It realizes the premixing of slurry before coating, reducing the fluctuation of solid content in the slurry used for coating. The premixing ratio can be adjusted and controlled according to actual needs. The stirring and circulation backflow methods achieve thorough and uniform mixing of the slurry. The adjustment of the feeding ratio is not limited to devices such as motors and pumps. There is no limitation on the number of feed inlets. Example 2

[0015] like Figure 1 As shown, this embodiment discloses a premixing system for slurry before coating, which includes a feeding device. The feeding device is connected to a primary premixing device and a secondary premixing device, and the primary premixing device is connected to the secondary premixing device. The primary premixing device includes a mixing buffer tank 1. The lower end of the mixing buffer tank 1 is connected to a support component 2. A mixing motor 3 is arranged above the mixing buffer tank 1, and the output shaft of the mixing motor 3 is connected to a stirring component extending into the mixing buffer tank 1. The stirring component is used to stir and mix the slurry in the mixing buffer tank 1.

[0016] For better results, the secondary premixing device includes a premixing chamber 4, which is connected to a rotor pump 5. The inlet of the premixing chamber 4 is connected to an intermediate pipe 6, the other end of which is connected to the mixing buffer tank 1. The outlet of the premixing chamber 4 is connected to a circulation pipe 7, the other end of which is also connected to the mixing buffer tank 1. The premixing chamber 4 is used for high-speed mixing of the slurry, and the mixed slurry is then returned to the mixing buffer tank 1 via the circulation pipe 7, thereby achieving complete mixing of the slurry.

[0017] For better results, the feeding device includes a feeding pipe 8, one end of which is connected to a feeding motor 9. A feeding port is located on the upper side wall of the feeding pipe 8, and the other end of the feeding pipe 8 is connected to a conduit 10, the other end of which is connected to the mixing buffer tank 1. Because the power setting of the feeding motor 9 varies, the amount of slurry input through the feeding port varies, thereby achieving adjustable feeding ratio control.

[0018] For better results, the feed pipe 8 includes a first pipe, a second pipe, and a third pipe. One end of each of the first, second, and third pipes is connected to the conduit 10, and the other end of the conduit 10 is detachably connected to the upper end of the mixing buffer tank 1. The intermediate pipe 6 is provided with a sampling port 11, and the side wall of the mixing buffer tank 1 is connected to a discharge pipe 12. The mixed slurry can be sampled through the sampling port 11 to check whether it meets the standards. The slurry that meets the standards is then connected to the coating process through the discharge pipe 12 for coating.

[0019] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A premix system for coating a slurry comprising a feed device, characterized in that: The feeding device is communicated with a first premixing device and a second premixing device, and the first premixing device is communicated with the second premixing device; the first premixing device comprises a mixing buffer tank, the lower end of the mixing buffer tank is connected with a support assembly, the upper portion of the mixing buffer tank is provided with a mixing motor, and the output shaft of the mixing motor is connected with a stirring assembly extending into the mixing buffer tank.

2. The pre-mix system for coating slurry according to claim 1, characterized in that: The second premixing device comprises a premixing chamber, the premixing chamber is connected with a rotor pump, the premixing chamber is communicated with an intermediate pipe at the feeding port, the other end of the intermediate pipe is communicated with the mixing buffer tank, the premixing chamber is communicated with a circulating pipe at the discharging port, and the other end of the circulating pipe is communicated with the mixing buffer tank.

3. The pre-mix system for coating slurry according to claim 1, wherein: The feeding device comprises a feeding pipe, one end of the feeding pipe is connected with a feeding motor, the upper side wall of the feeding pipe is provided with a feeding port, the other end of the feeding pipe is communicated with a guide pipe, and the other end of the guide pipe is communicated with the mixing buffer tank.

4. The pre-mix system for coating slurry according to claim 3, wherein: The feeding pipe comprises a first pipe, a second pipe and a third pipe, one end of the first pipe, the second pipe and the third pipe is communicated with the guide pipe, and the other end of the guide pipe is detachably communicated with the upper end of the mixing buffer tank.

5. The pre-mix system for coating slurry according to claim 2, wherein: The intermediate pipe is provided with a sampling port, and the side wall of the mixing buffer tank is communicated with a discharging pipe.

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