A battery positive electrode powder mixing device with a cooling system

Abstract

The utility model discloses a battery positive electrode powder mixing device with a cooling system, including a powder mixing drum, a screw conveyor, a first cooling plate and a second cooling plate; the powder mixing drum is used to mix the battery positive electrode powder, the screw conveyor is used to convey the battery positive electrode powder, the first cooling plate and the second cooling plate are coated on the surface of the screw conveyor, a coolant inlet pipe is provided on the first cooling plate, and a coolant discharge pipe is provided on the second cooling plate. The utility model can perform surface cooling treatment on the screw conveyor by arranging the first cooling plate and the second cooling plate on the surface of the screw conveyor to prevent the internal battery positive electrode powder from losing water or reducing performance due to excessive temperature during the conveying process; the coolant is introduced from the first cooling plate and discharged from the second cooling plate, ensuring that the coolant can be fully utilized in the process of passing through the entire system, while avoiding stagnation of the coolant after heat exchange, thereby maintaining cooling efficiency.

Description

Technical Field

[0001] The utility model relates to the field of powder mixing devices, in particular to a battery positive electrode powder mixing device with a cooling system. Background Art

[0002] Alkaline batteries are also called alkaline dry batteries, alkaline zinc-manganese batteries, and alkaline manganese batteries. They are the best performing variety in the zinc-manganese battery series and are suitable for large discharge and long-term use. The battery has a low internal resistance, so the current generated is larger than that of ordinary carbon batteries. Since these batteries do not contain mercury, they can be disposed of with domestic waste without deliberate recycling. The positive electrode powder is pressed through a ring pressing device to form the positive electrode ring of the alkaline battery. The performance of the positive electrode ring and the quality of the molding directly affect the quality of the battery.

[0003] In the prior art, the manufacturing process of positive electrode rings mainly includes several steps, including weighing, stirring, screw conveying, tableting, granulation and screening. Among them, when the positive electrode powder is stirred and then conveyed to the tablet press by a screw conveyor for pressing the positive electrode ring, mechanical friction and shear force are generated to generate heat. This heat will increase the temperature of the positive electrode material, causing the water in the positive electrode material to evaporate and form agglomerates. It will also cause the active substances in the positive electrode material to decompose or the performance to deteriorate, thereby reducing the production qualification rate of the positive electrode rings.

[0004] Therefore, the prior art has defects and needs to be improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a battery positive electrode powder mixing device with a cooling system, which can avoid water evaporation and loss and improve the production qualification rate of positive electrode rings.

[0006] To achieve this purpose, the utility model adopts the following technical solutions: a battery positive electrode powder mixing device with a cooling system, comprising a powder mixing drum, a screw conveyor, a first cooling plate and a second cooling plate;

[0007] The powder mixing drum is used to mix the positive electrode powder of the battery. The bottom of the powder mixing drum is provided with a discharge port, and the discharge port is connected to the feeding end of the screw conveyor. The screw conveyor is used to convey the positive electrode powder of the battery. The first cooling plate and the second cooling plate are coated on the surface of the screw conveyor.

[0008] The first cooling plate and the second cooling plate are connected through a first pipe, a coolant input pipe is provided on the first cooling plate, and a coolant discharge pipe is provided on the second cooling plate. The coolant input pipe is used to transport the coolant generated by the external refrigeration equipment to the first cooling plate, and the coolant discharge pipe is used to discharge the coolant after heat exchange;

[0009] The first cooling plate and the second cooling plate have the same structure, and both include an upper plate body, a lower plate body and a locking screw. The upper plate body and the lower plate body have flow channels for the flow of coolant. The bottom of the upper plate body is provided with a first arc groove that fits with the upper surface of the screw conveyor, and the top of the lower plate body is provided with a second arc groove that fits with the lower surface of the screw conveyor. The upper plate body and the lower plate body are connected by the locking screw.

[0010] By adopting the above-mentioned technical solutions, the battery positive electrode powder mixing device with a cooling system also includes a second pipe, and the upper plate body and the lower plate body are connected through the second pipe, and the second pipe is used to allow the coolant to flow between the upper plate body and the lower plate body.

[0011] By adopting the above-mentioned technical solutions, in the battery positive electrode powder mixing device with a cooling system, the first cooling plate and the second cooling plate are arranged in sequence along the conveying direction of the screw conveyor.

[0012] By adopting the above-mentioned technical solutions, in the battery positive electrode powder mixing device with a cooling system, the screw conveyor includes a driving motor, a rotating shaft, a conveying cylinder and a spiral blade;

[0013] The conveying cylinder is used to pass the stirred battery positive electrode powder, the rotating shaft is arranged in the conveying cylinder, the driving motor is connected to the rotating shaft to drive the rotating shaft to rotate, and the spiral blade is arranged around the surface of the rotating shaft to spirally convey the battery positive electrode powder as the rotating shaft rotates.

[0014] By adopting the above-mentioned technical solutions, in the battery positive electrode powder mixing device with a cooling system, the number of the screw conveyors is two groups, and the two groups of the screw conveyors are connected by a dividing pipe, and the dividing pipe is connected to the discharge port at the bottom of the powder mixing drum. The dividing pipe is used to divert and transport the battery positive electrode powder discharged from the powder mixing drum to the two groups of the screw conveyors.

[0015] By adopting the above-mentioned technical solutions, in the battery positive electrode powder mixing device with a cooling system, the first cooling plate and the second cooling plate are both made of aluminum alloy.

[0016] By adopting the above-mentioned technical solutions, in the battery positive electrode powder mixing device with a cooling system, the rotating shaft is a hollow shaft, and a rotating joint is provided at the end of the rotating shaft away from the driving motor, and the rotating joint is used to pass cooling liquid into the rotating shaft.

[0017] By adopting the above-mentioned technical solutions, the battery positive electrode powder mixing device with a cooling system further includes a clamped tube radiator, which includes a clamping plate and a cooling fan;

[0018] A third arc-shaped groove is provided at the bottom of the clamping plate, which is in contact with the surface of the conveying cylinder. A heat dissipation fin is provided on the back of the clamping plate. Ventilation holes are provided on the clamping plate. The cooling fan is provided on the clamping plate above the ventilation holes, and the air outlet end of the cooling fan is arranged toward the ventilation holes. The cooling fan is used to discharge the heat on the conveying cylinder.

[0019] By adopting the above-mentioned technical solutions, the battery positive electrode powder mixing device with a cooling system further includes a temperature sensor, which is arranged in the conveying cylinder to detect the ambient temperature in the conveying cylinder.

[0020] By adopting the above-mentioned technical solutions, in the battery positive electrode powder mixing device with a cooling system, a discharge trough is provided at one end of the conveying cylinder away from the driving motor, and the discharge trough is used to discharge the battery positive electrode powder in the conveying cylinder.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model can perform surface cooling treatment on the screw conveyor by arranging a first cooling plate and a second cooling plate on the surface of the screw conveyor, so as to prevent the internal battery positive electrode powder from losing water or reducing performance due to excessive temperature during the conveying process; the first cooling plate and the second cooling plate are arranged in series through a first pipeline, so as to increase the surface area and time of contact between the coolant and the screw conveyor, and improve the overall cooling efficiency; and by introducing the coolant from the first cooling plate and discharging it from the second cooling plate, it is ensured that the coolant can be fully utilized in the process of passing through the entire system, and at the same time, it is avoided that the coolant stagnates after heat exchange, so as to maintain the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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 these drawings without paying creative labor.

[0024] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0025] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of the screw conveyor of the utility model;

[0027] Figure 3 This is a schematic diagram of the internal structure of the upper plate body of the utility model;

[0028] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of the present utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the tube-clamp radiator of Example 2 of the utility model. DETAILED DESCRIPTION

[0030] In order to make the utility model's purpose, features, and advantages more obvious and easy to understand, the following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the embodiments described below are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in 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.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as a limitation on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0032] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0033] Example 1

[0034] like Figures 1 to 3 As shown, the embodiment of the utility model provides a battery positive electrode powder mixing device with a cooling system, including a powder mixing drum 1, a screw conveyor 2, a first cooling plate 3 and a second cooling plate 4;

[0035] The powder mixing drum 1 is used to mix the positive electrode powder of the battery. The bottom of the powder mixing drum 1 is provided with a discharge port 10, and the discharge port 10 is connected to the feeding end of the screw conveyor 2. The screw conveyor 2 is used to convey the positive electrode powder of the battery. The first cooling plate 3 and the second cooling plate 4 are coated on the surface of the screw conveyor 2.

[0036] The powder mixing drum 1 can fully stir the battery positive electrode powder such as lithium nickel cobalt manganese oxide, conductive agent, binder, etc. to fully mix these materials so as to improve the quality stability during the production of the positive electrode ring; the screw conveyor 2 can spirally convey the stirred battery positive electrode powder to the tablet press to realize the pressing and molding of the positive electrode ring. Since the screw conveyor 2 will generate a certain amount of heat due to mechanical stress and shear force during the material conveying process, this heat will cause the temperature inside the screw conveyor 2 to rise, thereby causing the water evaporation loss of the battery positive electrode powder, which is not only easy to cause agglomeration and affect the molding quality, but also will cause the decomposition or performance of the lithium nickel cobalt manganese oxide active material, thereby affecting the quality of the product; the first cooling plate 3 and the second cooling plate 4 can cool the screw conveyor 2 to prevent the battery positive electrode powder from losing water or performance degradation due to excessively high temperature during the conveying process.

[0037] like Figure 1 and Figure 3 As shown, the first cooling plate 3 is connected to the second cooling plate 4 through a first pipe 51, a coolant inlet pipe 30 is provided on the first cooling plate 3, and a coolant outlet pipe 40 is provided on the second cooling plate 4, the coolant inlet pipe 30 is used to transport the coolant generated by an external refrigeration device to the first cooling plate 3, and the coolant outlet pipe 40 is used to discharge the coolant after heat exchange; the first cooling plate 3 and the second cooling plate 4 are arranged in series through the first pipe 51, which increases the surface area and time of contact between the coolant and the screw conveyor 2, thereby improving the overall cooling efficiency; and by introducing the coolant from the first cooling plate 3 and discharging it from the second cooling plate 4, it is ensured that the coolant can be fully utilized in the process of passing through the entire system, while avoiding stagnation of the coolant after heat exchange, thereby maintaining the cooling efficiency.

[0038] like Figure 1 and Figure 3As shown, the first cooling plate 3 and the second cooling plate 4 have the same structure and both include an upper plate body 31, a lower plate body 32 and a locking screw 33. The upper plate body 31 and the lower plate body 32 have flow hole channels 300 for cooling liquid to flow therein. The bottom of the upper plate body 31 is provided with a first arc groove 310 which is in contact with the upper surface of the screw conveyor 2, and the top of the lower plate body 32 is provided with a second arc groove 320 which is in contact with the lower surface of the screw conveyor 2. Such a configuration can increase the contact area between the upper plate body 31 and the lower plate body 32 and the screw conveyor 2, thereby improving the cooling efficiency. The upper plate body 31 and the lower plate body 32 are connected by the locking screw 33 to reduce the gap between the upper plate body 31 and the lower plate body 32, so that they can be more closely attached to the surface of the screw conveyor 2 for cooling; and the configuration of the locking screw 33 can facilitate operators to easily disassemble the upper plate body 31 and the lower plate body 32 to carry out equipment inspection and maintenance.

[0039] like Figure 1 As shown, further, a second pipe 52 is included, and the upper plate body 31 and the lower plate body 32 are connected through the second pipe 52. The second pipe 52 is used to allow the coolant to flow between the upper plate body 31 and the lower plate body 32, so that the coolant can be evenly distributed on the surface of the screw conveyor 2, avoiding the temperature gradient phenomenon, and ensuring that all parts of the screw conveyor 2 are evenly cooled.

[0040] Furthermore, the first cooling plate 3 and the second cooling plate 4 are sequentially arranged along the conveying direction of the screw conveyor 2. By sequentially arranging the cooling plates along the conveying direction, the cooling process is divided into multiple stages to gradually reduce the temperature of the battery positive electrode powder.

[0041] like Figure 1 and Figure 2 As shown, further, the screw conveyor 2 includes a driving motor 21, a rotating shaft 22, a conveying cylinder 23 and a spiral blade 24, the conveying cylinder 23 is used to pass the stirred battery positive electrode powder, the rotating shaft 22 is arranged in the conveying cylinder 23, the driving motor 21 is connected to the rotating shaft 22 to drive the rotating shaft 22 to rotate, the spiral blade 24 is arranged around the surface of the rotating shaft 22, so as to spirally convey the battery positive electrode powder as the rotating shaft 22 rotates, and the battery positive electrode powder is continuously pushed and conveyed through the continuous rotation of the spiral blade 24.

[0042] like Figure 1 and Figure 2As shown, further, the number of the screw conveyors 2 is two groups, and the two groups of the screw conveyors 2 are connected by a distribution pipe 25, and the distribution pipe 25 is connected to the discharge port 10 at the bottom of the powder mixing drum 1. The distribution pipe 25 is used to divert the battery positive electrode powder discharged from the powder mixing drum 1 to the two groups of the screw conveyors 2. The battery positive electrode powder in the mixing drum is evenly distributed to the two groups of screw conveyors 2 through the distribution pipe 25, so that the material can be transported through two conveying channels at the same time, thereby improving the overall conveying efficiency.

[0043] Furthermore, the first cooling plate 3 and the second cooling plate 4 are both made of aluminum alloy. Aluminum alloy has good thermal conductivity and can quickly and effectively conduct heat, so that the first cooling plate 3 and the second cooling plate 4 can quickly absorb and transfer the heat generated by the screw conveyor 2 and the internal materials, thereby improving the cooling efficiency.

[0044] Furthermore, a discharge trough 230 is provided at one end of the conveying cylinder 23 away from the driving motor 21, and the discharge trough 230 is used to discharge the battery positive electrode powder in the conveying cylinder 23, so that the battery positive electrode powder can be transported to the tablet press through the conveying pipeline for tableting.

[0045] Example 2

[0046] like Figures 2 to 5 As shown, the embodiment of the utility model provides a battery positive electrode powder mixing device with a cooling system, including a powder mixing drum 1, a screw conveyor 2, a first cooling plate 3 and a second cooling plate 4;

[0047] The powder mixing drum 1 is used to mix the positive electrode powder of the battery. The bottom of the powder mixing drum 1 is provided with a discharge port 10, and the discharge port 10 is connected to the feeding end of the screw conveyor 2. The screw conveyor 2 is used to convey the positive electrode powder of the battery. The first cooling plate 3 and the second cooling plate 4 are coated on the surface of the screw conveyor 2.

[0048] The powder mixing drum 1 can fully stir the battery positive electrode powder such as lithium nickel cobalt manganese oxide, conductive agent, binder, etc. to fully mix these materials so as to improve the quality stability during the production of the positive electrode ring; the screw conveyor 2 can spirally convey the stirred battery positive electrode powder to the tablet press to realize the pressing and molding of the positive electrode ring. Since the screw conveyor 2 will generate a certain amount of heat due to mechanical stress and shear force during the material conveying process, this heat will cause the temperature inside the screw conveyor 2 to rise, thereby causing the water evaporation loss of the battery positive electrode powder, which is not only easy to cause agglomeration and affect the molding quality, but also will cause the decomposition or performance of the lithium nickel cobalt manganese oxide active material, thereby affecting the quality of the product; the first cooling plate 3 and the second cooling plate 4 can cool the screw conveyor 2 to prevent the battery positive electrode powder from losing water or performance degradation due to excessively high temperature during the conveying process.

[0049] like Figure 3 and Figure 4 As shown, the first cooling plate 3 is connected to the second cooling plate 4 through a first pipe 51, a coolant inlet pipe 30 is provided on the first cooling plate 3, and a coolant outlet pipe 40 is provided on the second cooling plate 4, the coolant inlet pipe 30 is used to transport the coolant generated by an external refrigeration device to the first cooling plate 3, and the coolant outlet pipe 40 is used to discharge the coolant after heat exchange; the first cooling plate 3 and the second cooling plate 4 are arranged in series through the first pipe 51, which increases the surface area and time of contact between the coolant and the screw conveyor 2, thereby improving the overall cooling efficiency; and by introducing the coolant from the first cooling plate 3 and discharging it from the second cooling plate 4, it is ensured that the coolant can be fully utilized in the process of passing through the entire system, while avoiding stagnation of the coolant after heat exchange, thereby maintaining the cooling efficiency.

[0050] The first cooling plate 3 and the second cooling plate 4 have the same structure and both include an upper plate body 31, a lower plate body 32 and a locking screw 33. The upper plate body 31 and the lower plate body 32 have flow hole channels 300 for cooling liquid to flow therein. The bottom of the upper plate body 31 is provided with a first arc groove 310 that fits with the upper surface of the screw conveyor 2, and the top of the lower plate body 32 is provided with a second arc groove 320 that fits with the lower surface of the screw conveyor 2. This arrangement can increase the fitting area between the upper plate body 31 and the lower plate body 32 and the screw conveyor 2, thereby improving the cooling efficiency. The upper plate body 31 and the lower plate body 32 are connected by the locking screw 33 to reduce the gap between the upper plate body 31 and the lower plate body 32, so that they can fit more closely to the surface of the screw conveyor 2 for cooling; and the arrangement of the locking screw 33 can facilitate operators to easily disassemble the upper plate body 31 and the lower plate body 32 to carry out equipment inspection and maintenance.

[0051] like Figure 2As shown, further, the screw conveyor 2 includes a driving motor 21, a rotating shaft 22, a conveying cylinder 23 and a spiral blade 24, the conveying cylinder 23 is used to pass the stirred battery positive electrode powder, the rotating shaft 22 is arranged in the conveying cylinder 23, the driving motor 21 is connected to the rotating shaft 22 to drive the rotating shaft 22 to rotate, the spiral blade 24 is arranged around the surface of the rotating shaft 22, so as to spirally convey the battery positive electrode powder as the rotating shaft 22 rotates, and the battery positive electrode powder is continuously pushed and conveyed through the continuous rotation of the spiral blade 24.

[0052] Furthermore, the rotating shaft 22 is a hollow shaft, and a rotating joint 221 is provided at the end of the rotating shaft 22 away from the driving motor 21. The rotating joint 221 is used to pass cooling liquid into the rotating shaft 22. The cooling liquid can take away the heat inside the screw conveyor 2 to improve the cooling efficiency of the entire system.

[0053] like Figure 4 and Figure 5 As shown, further, a clamping tube radiator 6 is included, the clamping tube radiator 6 includes a clamping plate 61 and a cooling fan 62, the bottom of the clamping plate 61 is provided with a third arc groove 610 that fits the surface of the conveying cylinder 23, the back of the clamping plate 61 is provided with a cooling fin 611, the clamping plate 61 is provided with a ventilation hole 612, the cooling fan 62 is arranged on the clamping plate 61 above the ventilation hole 612, and the air outlet end of the cooling fan 62 is arranged toward the ventilation hole 612, and the cooling fan 62 is used to discharge the heat on the conveying cylinder 23. The cooling fan 62 can quickly take away the heat through the ventilation hole 612, enhance the heat dissipation effect, and enable the conveying cylinder 23 and the battery positive electrode powder inside to be in a low-temperature conveying state.

[0054] Furthermore, a temperature sensor (not shown) is included. The temperature sensor is arranged in the conveying cylinder 23 to detect the ambient temperature in the conveying cylinder 23. According to the data fed back by the temperature sensor, the cooling system can dynamically adjust the cooling intensity to ensure that the temperature is maintained within the optimal range.

[0055] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A battery positive electrode powder mixing device with a cooling system, characterized in that: It includes a powder mixing drum, a screw conveyor, a first cooling plate and a second cooling plate; The powder mixing drum is used to mix the positive electrode powder of the battery. The bottom of the powder mixing drum is provided with a discharge port, and the discharge port is connected to the feeding end of the screw conveyor. The screw conveyor is used to convey the positive electrode powder of the battery. The first cooling plate and the second cooling plate are coated on the surface of the screw conveyor. The first cooling plate and the second cooling plate are connected through a first pipe, a coolant input pipe is provided on the first cooling plate, and a coolant discharge pipe is provided on the second cooling plate. The coolant input pipe is used to transport the coolant generated by the external refrigeration equipment to the first cooling plate, and the coolant discharge pipe is used to discharge the coolant after heat exchange; The first cooling plate and the second cooling plate have the same structure, and both include an upper plate body, a lower plate body and a locking screw. The upper plate body and the lower plate body have flow channels for the flow of coolant. The bottom of the upper plate body is provided with a first arc groove that fits with the upper surface of the screw conveyor, and the top of the lower plate body is provided with a second arc groove that fits with the lower surface of the screw conveyor. The upper plate body and the lower plate body are connected by the locking screw.

2. The battery positive electrode powder mixing device with a cooling system according to claim 1, characterized in that: A second pipeline is also included, through which the upper plate body and the lower plate body are connected, and the second pipeline is used to allow the cooling liquid to flow between the upper plate body and the lower plate body.

3. The battery positive electrode powder mixing device with a cooling system according to claim 1, characterized in that: The first cooling plate and the second cooling plate are sequentially arranged along a conveying direction of the screw conveyor.

4. The battery positive electrode powder mixing device with a cooling system according to claim 1, characterized in that: The screw conveyor comprises a driving motor, a rotating shaft, a conveying cylinder and a spiral blade; The conveying cylinder is used to pass the stirred battery positive electrode powder, the rotating shaft is arranged in the conveying cylinder, the driving motor is connected to the rotating shaft to drive the rotating shaft to rotate, and the spiral blade is arranged around the surface of the rotating shaft to spirally convey the battery positive electrode powder as the rotating shaft rotates.

5. The battery positive electrode powder mixing device with a cooling system according to claim 1, characterized in that: There are two groups of screw conveyors, which are connected by a dividing pipe. The dividing pipe is connected to the discharge port at the bottom of the powder mixing drum. The dividing pipe is used to divert the battery positive electrode powder discharged from the powder mixing drum and convey it to the two groups of screw conveyors.

6. The battery positive electrode powder mixing device with a cooling system according to claim 1, characterized in that: The first cooling plate and the second cooling plate are both made of aluminum alloy.

7. The battery positive electrode powder mixing device with a cooling system according to claim 4, characterized in that: The rotating shaft is a hollow shaft. A rotating joint is provided at the end of the rotating shaft away from the driving motor. The rotating joint is used to allow cooling liquid to flow into the rotating shaft.

8. The battery positive electrode powder mixing device with a cooling system according to claim 4, characterized in that: Also included is a tube clamp radiator, which includes a clamping plate and a cooling fan; A third arc-shaped groove is provided at the bottom of the clamping plate, which is in contact with the surface of the conveying cylinder. A heat dissipation fin is provided on the back of the clamping plate. Ventilation holes are provided on the clamping plate. The cooling fan is provided on the clamping plate above the ventilation holes, and the air outlet end of the cooling fan is arranged toward the ventilation holes. The cooling fan is used to discharge the heat on the conveying cylinder.

9. The battery positive electrode powder mixing device with a cooling system according to claim 4, characterized in that: A temperature sensor is also included. The temperature sensor is arranged in the conveying cylinder to detect the ambient temperature in the conveying cylinder.

10. The battery positive electrode powder mixing device with a cooling system according to claim 4, characterized in that: A discharge trough is provided at one end of the conveying cylinder away from the driving motor, and the discharge trough is used to discharge the battery positive electrode powder in the conveying cylinder.

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