Kneading equipment used after dry-method powder fibrillation

Abstract

The utility model relates to the field of battery manufacturing, in particular to kneading equipment used after dry-method powder fibrillation. The equipment comprises a kneading assembly and a supporting base, wherein the kneading assembly is arranged on the supporting base; the kneading assembly comprises a stock bin, a first kneading propeller, a second kneading propeller, a first motor and a second motor. The first kneading propeller and the second kneading propeller which are arranged in the stock bin are driven by the first motor and the second motor to rotate, and the fibrillated electrode material in the stock bin is stirred and kneaded, so that the fibration strength and uniformity of the fibrillated electrode material are improved, the film strength and compactness are greatly improved in the subsequent film preparation process, and the production efficiency is improved. The membrane prepared from the fibrillated electrode material treated by the equipment can meet the requirements of a dry manufacturing process. The equipment provided by the utility model is simple to operate, low in cost and high in efficiency, and has an excellent strengthening effect on the fibrillated electrode material.

Description

Technical Field

[0001] The utility model relates to the field of battery manufacturing, in particular to a kneading device used for dry powder fibrillation. Background Art

[0002] In the manufacturing process of lithium-ion batteries, dry manufacturing processes have become a major research focus due to their unique advantages. Based on this dry manufacturing process, there is currently a dry fibrillation process for manufacturing all-solid-state batteries. In this process, the electrode material powders are mixed uniformly and fibrillated. The fibrillated electrode material is then used to form a membrane, and finally, the membrane is used to manufacture the all-solid-state battery.

[0003] However, directly using the fibrillated electrode material to make a membrane, the quality, density, and performance of the membrane obtained are difficult to meet the needs of battery manufacturing and are difficult to meet the requirements of the dry manufacturing process.

[0004] Therefore, there is an urgent need for a device that can process the fibrillated electrode material so that it can meet the requirements of the dry manufacturing process. Utility Model Content

[0005] The utility model provides a kneading device for dry powder fibrillation to solve the problem in the prior art that the quality, density and performance of the obtained film are difficult to meet the requirements of battery manufacturing and are difficult to meet the requirements of the dry manufacturing process.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is:

[0007] In a first aspect, an embodiment of the present invention provides a kneading device for dry powder fibrillation, comprising: a kneading component and a support base, wherein the kneading component is arranged on the support base; the kneading component comprises a hopper, a first kneading screw, a second kneading screw, and a first motor and a second motor; the hopper is a rectangular groove, and the hopper comprises a first hopper wall and a second hopper wall arranged opposite to each other; the first kneading screw is arranged on the first hopper wall and connected to the first hopper wall through a first bearing, and the second kneading screw is arranged on the second hopper wall and connected to the second hopper wall through a second bearing, The first kneading propeller and the second kneading propeller have the same shape and opposite directions; the first kneading propeller includes a power end and a fixed end, the power end of the first kneading propeller is close to the first bearing, the first motor is dynamically connected to the power end of the first kneading propeller, and the fixed end of the first kneading propeller is connected to the second silo wall through the third bearing; the second kneading propeller includes a power end and a fixed end, the power end of the second kneading propeller is close to the second bearing, the second motor is dynamically connected to the power end of the second kneading propeller, and the fixed end of the second kneading propeller is connected to the first silo wall through the fourth bearing.

[0008] In some embodiments, the bottom of the hopper comprises a first accommodating groove and a second accommodating groove connected to each other, the first accommodating groove and the second accommodating groove are arc-shaped accommodating grooves, and the connected edges of the first accommodating groove and the second accommodating groove are tangentially arranged; the first kneading propeller is arranged in the first accommodating groove, and the second kneading propeller is arranged in the second accommodating groove.

[0009] In some embodiments, the distance between the first kneading propeller and the second kneading propeller is 0.2 mm to 0.8 mm; the distance between the first kneading propeller and the first accommodating groove is 0.2 mm to 0.8 mm; and the distance between the second kneading propeller and the second accommodating groove is 0.2 mm to 0.8 mm.

[0010] In some embodiments, the first kneading propeller and the second kneading propeller comprise a main rod and a first propeller blade and a second propeller blade arranged oppositely on the main rod, the first propeller blade and the second propeller blade are the same in shape and opposite in direction.

[0011] In some embodiments, the helical angle of the first propeller blade and the second propeller blade is 65° to 85°, and the propeller cross-section angle is 26° to 46°.

[0012] In some embodiments, the device further comprises a pressure head assembly, the pressure head assembly comprises a fixed plate, a connecting rod, and a kneading pressure head; the fixed plate is arranged at the opening of the hopper and is fixedly connected to the hopper through a fixed connecting piece; the connecting rod is arranged on the fixed plate, and the end of the connecting rod close to the hopper is provided with the kneading pressure head; the kneading pressure head is the same in shape as the cross section of the hopper, and the end of the kneading pressure head close to the first kneading propeller and the second kneading propeller is provided with an arc-shaped groove for cooperating with the first accommodating groove and the second accommodating groove to form an accommodating space capable of accommodating the first kneading propeller and the second kneading propeller.

[0013] In some embodiments, the fixed plate is further provided with a spring assembly; the connecting rod is connected to the spring assembly, and the spring assembly enables the kneading pressure head to move in the vertical direction when the kneading pressure head is subjected to a force in the vertical direction.

[0014] In some embodiments, the hopper is provided with at least a vacuum extraction assembly and a heating assembly; the vacuum extraction assembly comprises an air extraction pipeline and a vacuum pump, the vacuum pump is arranged in the base, the air extraction pipeline is arranged on the hopper, one end of the air extraction pipeline is deep into the hopper, and the other end is connected to the vacuum pump; the heating assembly comprises at least one heating rod, and the heating rods are uniformly distributed on the hopper.

[0015] In some embodiments, the supporting base comprises: a base, a motor compartment and a first bottom plate; the base comprises oppositely arranged first and second ventilation vertical plates, oppositely arranged control and support vertical plates, and a top plate and a second bottom plate, the control vertical plate, the first ventilation vertical plate, the support vertical plate and the second ventilation vertical plate are sequentially connected end to end to form the base around the top plate and the second bottom plate, the second bottom plate is provided with a plurality of footings on the side thereof outward, and at least one ventilation window is arranged on the first and second ventilation vertical plates; the motor compartment is fixedly connected with the base through the top plate, and is used for accommodating the first and second motors; the first bottom plate is arranged at the top end of the motor compartment and is rotationally connected with the motor compartment through a rotating shaft, and the kneading assembly is fixedly connected with the first bottom plate.

[0016] In some embodiments, the device further comprises: a control assembly; the control assembly is arranged in the base and is fixedly connected with the second bottom plate; the control assembly is electrically connected with the first and second motors, the vacuum pump and the heating rod; a control device is arranged on the control vertical plate and is connected with the control assembly, and the control device comprises at least one of a control panel and a control button.

[0017] The device provided by the utility model has the advantages that: the first motor and the second motor drive the first kneading propeller and the second kneading propeller arranged in the material bin to rotate, the fibrillated electrode material in the material bin is stirred and kneaded, the fibrillated electrode material is improved in fiberization intensity and uniformity, the film strength and compactness are greatly improved in the subsequent film manufacturing process, the film made of the fibrillated electrode material processed by the device can meet the requirements of the dry manufacturing process, the device is simple to operate, low in cost, high in efficiency and excellent in strengthening effect on the fibrillated electrode material. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A front view of the kneading device for the fibrillated dry powder provided by an embodiment of the utility model is provided;

[0019] Figure 2 A side view of the kneading device for the fibrillated dry powder provided by an embodiment of the utility model is provided;

[0020] Figure 3 A sectional view of the kneading assembly provided by an embodiment of the utility model is provided;

[0021] Figure 4 A perspective view of the kneading assembly provided by an embodiment of the utility model is provided;

[0022] Figure 5 A structural schematic view of the first kneading propeller provided by an embodiment of the utility model is provided;

[0023] Figure 6 A structural schematic view of the pressure head assembly provided by an embodiment of the utility model is provided;

[0024] Figure 7 An assembly structure diagram of the pressure head assembly and the kneading assembly provided by an embodiment of the present application is shown in the figure.

[0025] Figure 8 A front view of the support base provided by an embodiment of the present application is shown in the figure.

[0026] In the figure: 1-kneading assembly; 11-bin; 111-first bin wall; 112-second bin wall; 113-first bearing; 114-second bearing; 115-third bearing; 116-fourth bearing; first kneading propeller 12; 121-main body rod; 122-first propeller blade; 123-second propeller blade; 13-first accommodating groove; second kneading propeller 14; 15-second accommodating groove; 16-first motor; 161-first transmission assembly; 162-first speed reduction assembly; 17-second motor; 171-second transmission assembly; 172-second speed reduction assembly; 18-heating rod; 19-exhaust pipe; 2-support base; 21-base; 211-first ventilation vertical plate; 212-second ventilation vertical plate; 213-control vertical plate; 214-top plate; 215-second bottom plate; 216-ventilation window; 217-anchoring foot; 218-support vertical plate; 219-control device; 22-motor bin; 23-first bottom plate; 24-rotation shaft; 3-pressure head assembly; 31-fixing plate; 32-connecting rod; 33-kneading pressure head; 34-spring assembly; 35-adjusting assembly; 4-shield; 5-thermal sensor. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0030] In the description of the utility model, it is necessary to explain that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the utility model, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] Figure 1 A front view of the kneading equipment for dry powder fibrillation provided by an embodiment of the application is provided; Figure 2 A side view of the kneading equipment for dry powder fibrillation provided by an embodiment of the application is provided; Figure 3 A sectional view of the kneading assembly provided by an embodiment of the application is provided; Figure 4 A perspective view of the kneading assembly provided by an embodiment of the application is provided.

[0034] Reference Figure 1 A kneading equipment for dry powder fibrillation, comprising: a kneading assembly 1 and a supporting base 2, the kneading assembly 1 is arranged on the supporting base 2.

[0035] Reference Figure 2 And Figure 3The kneading assembly 1 comprises a hopper 11, a first kneading propeller 12, a second kneading propeller 14, a first motor 16 and a second motor 17. The hopper 11 is a rectangular recess, and the hopper 11 comprises a first hopper wall 111 and a second hopper wall 112 arranged oppositely. The first kneading propeller 12 is arranged on the first hopper wall 111 and connected to the first hopper wall 111 through a first bearing 113, and the second kneading propeller 14 is arranged on the second hopper wall 112 and connected to the second hopper wall 112 through a second bearing 114. The first kneading propeller 12 and the second kneading propeller 14 are identical in shape and opposite in direction. The first kneading propeller 12 comprises a power end and a fixed end. The power end of the first kneading propeller 12 is close to the first bearing 113, and the first motor 16 is connected to the power end of the first kneading propeller 12. The fixed end of the first kneading propeller 12 is connected to the second hopper wall 112 through a third bearing 115. The second kneading propeller 14 comprises a power end and a fixed end. The power end of the second kneading propeller 14 is close to the second bearing 114, and the second motor 17 is connected to the power end of the second kneading propeller 14. The fixed end of the second kneading propeller 14 is connected to the first hopper wall 111 through a fourth bearing 116.

[0036] In some embodiments, the reference Figure 2 and Figure 3 The hopper 11 is provided with at least a vacuumizing assembly and a heating assembly.

[0037] In some embodiments, the vacuumizing assembly comprises an air suction pipeline 19 and a vacuum pump (not shown). The vacuum pump (not shown) is arranged in the base, and the air suction pipeline 19 is arranged on the hopper 11. One end of the air suction pipeline 19 is arranged in the hopper 11, and the other end is connected to the vacuum pump.

[0038] In some embodiments, the reference Figure 2 The heating assembly comprises at least one heating rod 18, and the heating rods 18 are uniformly distributed on the hopper 11. The heating rod 18 can be arranged in the outer wall or the interlayer of the hopper 11. The heating rod 18 can be an electric heating rod, an oil heating tube or the like. When the heating rod 18 is an oil heating tube, the heating assembly further comprises a heating pump head connected to the oil heating tube. The heating pump head is used for heating the oil in the oil heating tube and making the oil circulate in the oil heating tube to achieve heating. For example, the number of the heating rods 18 can be six, which are arranged on the side wall and the bottom of the hopper 11.

[0039] In some embodiments, the device further comprises at least one thermal sensor 5. The thermal sensor 5 can be arranged on the inner wall and the outer wall of the hopper 11, and the thermal sensor 5 is used for measuring the internal temperature and the outer wall heating temperature of the hopper 11.

[0040] In some embodiments, when the hopper 11 is heated, the outer wall heating temperature is set to 80-200℃, and the internal temperature should be controlled to 50-150℃.

[0041] In some embodiments, referring to Figure 4 , the first motor 16 is connected to the power end of the first kneading propeller 12, including: the power shaft of the first motor 16 is connected to the first transmission assembly 161, the first transmission assembly 161 is connected to the first speed reduction assembly 162, and the first speed reduction assembly 162 is connected to the power end of the first kneading propeller 12.

[0042] In some embodiments, referring to Figure 4 , the second motor 17 is connected to the power end of the second kneading propeller 14, including: the power shaft of the second motor 17 is connected to the second transmission assembly 171, the second transmission assembly 171 is connected to the second speed reduction assembly 172, and the second speed reduction assembly 172 is connected to the power end of the second kneading propeller 14.

[0043] In some embodiments, referring to Figure 4 , the first transmission assembly 161 and the second transmission assembly 171 are in the form of belt drive wheels, but in other embodiments, the first transmission assembly 161 and the second transmission assembly 171 can also be realized in the form of gear sets, transmission shafts, etc.

[0044] In some embodiments, the first kneading propeller 12 and the second kneading propeller 14 can rotate in the same direction or in the opposite direction when rotating, and the rotational speed can be the same or can have a differential speed. As an example, the rotational speed of the first kneading propeller 12 and the second kneading propeller 14 should be less than or equal to 75 revolutions per minute, and when the first kneading propeller 12 and the second kneading propeller 14 have a differential speed, the differential speed ratio of the first kneading propeller 12 and the second kneading propeller 14 can be set between 1:2 and 1:4. When the first kneading propeller 12 and the second kneading propeller 14 rotate at the same speed, the rotational speed of the first kneading propeller 12 and the second kneading propeller 14 can achieve better kneading effect when the rotational speed is between 50 and 70 revolutions per minute.

[0045] In some embodiments, referring to Figure 3 , the bottom of the hopper 11 includes a first accommodating groove 13 and a second accommodating groove 15 connected thereto, both of which are arc-shaped accommodating grooves, and the connected edges of the first accommodating groove 13 and the second accommodating groove 15 are tangentially arranged; the first kneading propeller 12 is arranged in the first accommodating groove 13, and the second kneading propeller 14 is arranged in the second accommodating groove 15.

[0046] In some embodiments, the distance between the first kneading propeller 12 and the second kneading propeller 14 is between 0.2 mm and 0.8 mm; the distance between the first kneading propeller 12 and the first accommodating groove 13 is between 0.2 mm and 0.8 mm; and the distance between the second kneading propeller 14 and the second accommodating groove 15 is between 0.2 mm and 0.8 mm.

[0047] Preferably, the distance between the first kneading propeller 12 and the second kneading propeller 14 is 0.5 mm; the distance between the first kneading propeller 12 and the first accommodating groove 13 is 0.5 mm; and the distance between the second kneading propeller 14 and the second accommodating groove 15 is 0.5 mm.

[0048] Preferably, the distance between the first kneading propeller 12 and the second kneading propeller 14 is 0.5 mm; the distance between the first kneading propeller 12 and the first accommodating groove 13 is 0.5 mm; and the distance between the second kneading propeller 14 and the second accommodating groove 15 is 0.5 mm.

[0049] Figure 5 A structural schematic diagram of the first kneading propeller according to an embodiment of the present application is shown in FIG. 1.

[0050] Reference is made to Figure 5 The first kneading propeller 12 comprises a main body 121, and a first propeller blade 122 and a second propeller blade 123 oppositely arranged on the main body 121. The first propeller blade 122 and the second propeller blade 123 are identical in shape and opposite in direction.

[0051] In some embodiments, the helix angle of the first propeller blade and the second propeller blade is 65° to 85°, and the blade cross-section angle is 26° to 46°.

[0052] Preferably, the helix angle of the first propeller blade and the second propeller blade is 75°, and the blade cross-section angle is 36°.

[0053] It should be noted that the first kneading propeller 12 and the second kneading propeller 14 are identical in shape, and the shape of the second kneading propeller 14 can also be represented by the first kneading propeller 12 in Figure 4 , which will not be described herein.

[0054] Figure 6 A structural schematic diagram of the pressure head assembly according to an embodiment of the present application is shown in FIG. 2. Figure 7 An assembly structural schematic diagram of the pressure head assembly and the kneading assembly according to an embodiment of the present application is shown in FIG. 3.

[0055] In some embodiments, reference is made to Figure 1 , Figure 2 and Figure 6The device further comprises a pressure head assembly 3; the pressure head assembly 3 comprises a fixed plate 31, a connecting rod 32, and a kneading pressure head 33; the fixed plate 31 is arranged at the opening of the hopper 11 and is fixedly connected to the hopper 11 through a fixed connecting piece; the connecting rod 32 is arranged on the fixed plate 31, and one end of the connecting rod 32 close to the hopper 11 is provided with the kneading pressure head 33; the kneading pressure head 33 has the same cross-sectional shape as the hopper 11, and one end of the kneading pressure head 33 close to the first kneading propeller 12 and the second kneading propeller 14 is provided with an arc-shaped groove for cooperating with the first accommodating groove 13 and the second accommodating groove 15 to form an accommodating space capable of accommodating the first kneading propeller 12 and the second kneading propeller 14.

[0056] In some embodiments, the fixed plate 31 is further provided with a spring assembly 34; the connecting rod 32 is connected to the spring assembly 34, and the spring assembly 34 enables the kneading pressure head 33 to move in the vertical direction when the kneading pressure head 33 is subjected to a force in the vertical direction.

[0057] In some embodiments, the kneading pressure head 33 can exert a certain pressure on the fibrillated electrode material being stirred in the hopper 11, and the spring assembly 34 enables the kneading pressure head 33 to move upward after being subjected to a force, so that the fibrillated electrode material being stirred will not be subjected to excessive pressure, ensuring that the kneading pressure head 33 will move up and down with the stirring of the fibrillated electrode material during the kneading process, thereby increasing the kneading efficiency and ensuring that the fibrillated electrode material will not be too compacted.

[0058] In some embodiments, the spring assembly 34 is further provided with an adjusting assembly 35 connected to the connecting rod 32, which is used to adjust the initial height of the kneading pressure head 33 by driving the connecting rod 32 to move up and down.

[0059] In some embodiments, the initial height of the kneading pressure head 33 is the distance between the kneading pressure head 33 and the blades of the first kneading propeller 12 and the second kneading propeller 14. As an example, the initial height can be 1 to 10 mm.

[0060] Figure 8 The front view of the support base provided in an embodiment of the present application.

[0061] In some embodiments, with reference to Figure 1 , Figure 2 and Figure 8The supporting base 2 comprises a base 21, a motor compartment 22 and a first bottom plate 23. The base 21 comprises oppositely arranged first and second ventilation vertical plates 211 and 212, oppositely arranged control and supporting vertical plates 213 and 218, and a top plate 214 and a second bottom plate 215. The control vertical plate 213, the first ventilation vertical plate 211, the supporting vertical plate 218 and the second ventilation vertical plate 212 are sequentially connected end to end to form the base 21 around the top plate 214 and the second bottom plate 215. The second bottom plate 215 is provided with a plurality of footings 217 on the outer side thereof. The first ventilation vertical plate 211 and the second ventilation vertical plate 212 are provided with at least one ventilation window 216. The motor compartment 22 is fixedly connected with the base 21 through the top plate 214. The motor compartment 22 is used for accommodating the first and second motors 16 and 17. The first bottom plate 23 is arranged at the top end of the motor compartment 22 and is rotationally connected with the motor compartment 22 through a rotating shaft 24. The kneading assembly 1 is fixedly connected with the first bottom plate 23.

[0062] In some embodiments, the first bottom plate 23 can drive the kneading assembly 1 to rotate through the rotating shaft 24, so that the processed material in the material bin 11 can be poured out. As an example, when the first bottom plate 23 drives the kneading assembly 1 to rotate through the rotating shaft 24, the rotation can be realized by manpower, or can be realized by automatic rotation through a hydraulic device, a gas pump device or a motor power assembly.

[0063] In some embodiments, a cover 4 is further arranged outside the motor compartment 22. The cover 4 is used for covering the first transmission assembly 161, the first speed reduction assembly 162, the second transmission assembly 171 and the second speed reduction assembly 172 extending from the motor compartment 22.

[0064] In some embodiments, the device further comprises a control assembly (not shown). The control assembly is arranged in the base 21 and is fixedly connected with the second bottom plate 215. The control assembly is electrically connected with the first and second motors 16 and 17, the vacuum pump and the heating rod 18. The control assembly is provided with a control device 219 on the control vertical plate 213. The control device 219 comprises at least one of a control panel and a control button. For example, the control button can be used for switching on / off, emergency stop and other operations of the kneading device after dry powder fibrillation. The control panel can be used for configuring the rotation speed, rotation direction and rotation time of the first and second motors 16 and 17 respectively, and configuring the heating temperature of the heating rod 18.

[0065] Here, the working process of the kneading device after dry powder fibrillation is described in combination with the above embodiments. The configuration parameters are only examples and do not limit the present application.

[0066] In use of the equipment, the pressure head assembly 3 can be taken down first, and a certain amount of fibrillated electrode material needing kneading is added into the hopper 11. Then, the pressure head assembly 3 is fixedly connected with the hopper 11 through the fixed connecting piece. The configuration parameters of the kneading process are configured through the control panel on the base 21. As an example, the configuration parameters of the kneading process can include: the outer wall heating temperature is 150 DEG C, the internal temperature is controlled at 120 to 130 DEG C, the first kneading propeller 12 and the second kneading propeller 14 rotate reversely, the differential speed ratio is 1:2, that is, the rotating speed of the first kneading propeller 12 is 70 r / min, the rotating speed of the second kneading propeller 14 is 75 r / min, and the rotating time length is 10 minutes.

[0067] Then, the equipment is started by operating the control panel, and the kneading process is executed.

[0068] Finally, after kneading for 10 minutes according to the configuration parameters, the pressure head assembly 3 is taken down, and the hopper 11 is rotated around the rotating shaft 24 by the hydraulic device, so that the kneaded material is poured out, and the kneading process is completed.

[0069] The beneficial effects of the present application are as follows: the first kneading propeller and the second kneading propeller arranged in the hopper are driven to rotate by the first motor and the second motor, the fibrillated electrode material in the hopper is stirred and kneaded, the fibrillated electrode material is increased in fiberization intensity and uniformity, the film strength and compactness are greatly improved in the subsequent film manufacturing process, the film made of the fibrillated electrode material processed by the equipment can meet the requirements of the dry manufacturing process, the equipment is simple in operation, low in cost, high in efficiency, and excellent in strengthening effect on the fibrillated electrode material.

[0070] It should be noted that in the present application, the content which can be undoubtedly determined by those skilled in the art, such as circuit and controller, is not described in detail. Those skilled in the art can obtain specific implementation schemes without any doubt according to the content of the present application.

[0071] The above is only the preferred embodiment of the present application and is not used to limit the present application. Those skilled in the art can make various changes and modifications to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A kneading device for dry powder fibrillation, characterized by, The device comprises: a kneading assembly and a supporting base, wherein the kneading assembly is arranged on the supporting base; the kneading assembly comprises a hopper, a first kneading propeller, a second kneading propeller, a first motor and a second motor; the hopper is a rectangular recess, and the hopper comprises a first hopper wall and a second hopper wall arranged oppositely; the first kneading propeller is arranged on the first hopper wall and connected to the first hopper wall through a first bearing, and the second kneading propeller is arranged on the second hopper wall and connected to the second hopper wall through a second bearing, wherein the first kneading propeller and the second kneading propeller are identical in shape and opposite in direction; the first kneading propeller comprises a power end and a fixed end, wherein the power end of the first kneading propeller is close to the first bearing, the first motor is connected to the power end of the first kneading propeller in a power manner, and the fixed end of the first kneading propeller is connected to the second hopper wall through a third bearing; the second kneading propeller comprises a power end and a fixed end, wherein the power end of the second kneading propeller is close to the second bearing, the second motor is connected to the power end of the second kneading propeller in a power manner, and the fixed end of the second kneading propeller is connected to the first hopper wall through a fourth bearing.

2. The apparatus of claim 1, wherein, the bottom of the hopper comprises a first accommodating groove and a second accommodating groove connected to each other, wherein the first accommodating groove and the second accommodating groove are arc-shaped accommodating grooves, and the connected edges of the first accommodating groove and the second accommodating groove are arranged tangentially; the first kneading propeller is arranged in the first accommodating groove, and the second kneading propeller is arranged in the second accommodating groove.

3. The apparatus of claim 2, wherein, the distance between the first kneading propeller and the second kneading propeller is 0.2mm to 0.8mm; the distance between the first kneading propeller and the first accommodating groove is 0.2mm to 0.8mm; the distance between the second kneading propeller and the second accommodating groove is 0.2mm to 0.8mm.

4. The apparatus of any one of claims 1-3, wherein, the first kneading propeller and the second kneading propeller comprise: a main rod and a first blade and a second blade arranged oppositely on the main rod, wherein the first blade and the second blade are identical in shape and opposite in direction.

5. The apparatus of claim 4, wherein, the helix angle of the first blade and the second blade is 65° to 85°, and the blade cross-section angle is 26° to 46°.

6. The apparatus of claim 2, wherein, the device further comprises a pressure head assembly; the pressure head assembly comprises a fixed plate, a connecting rod and a kneading pressure head; the fixed plate is arranged at the opening of the hopper and is fixedly connected to the hopper through a fixed connecting piece; the connecting rod is arranged on the fixed plate, and one end of the connecting rod close to the hopper is provided with the kneading pressure head; the kneading pressure head is identical in shape to the cross section of the hopper, one end of the kneading pressure head close to the first kneading propeller and the second kneading propeller is provided with an arc-shaped recess, which is used to cooperate with the first accommodating groove and the second accommodating groove to form an accommodating space capable of accommodating the first kneading propeller and the second kneading propeller.

7. The apparatus of claim 6, wherein, the fixed plate is further provided with a spring assembly; The connecting rod is connected with the spring assembly, and the spring assembly is used to enable the kneading pressure head to move in the vertical direction when the kneading pressure head is subjected to a force in the vertical direction.

8. The apparatus of claim 1, wherein, The hopper is provided with at least a vacuumizing assembly and a heating assembly. The vacuumizing assembly comprises an air exhaust pipe and a vacuum pump, the vacuum pump is arranged in the base, the air exhaust pipe is arranged on the hopper, one end of the air exhaust pipe is arranged in the hopper, and the other end of the air exhaust pipe is connected with the vacuum pump. The heating assembly comprises at least one heating rod, and the heating rods are uniformly distributed on the hopper.

9. The apparatus of claim 8, wherein, The supporting base comprises a base, a motor compartment and a first bottom plate. The base comprises oppositely arranged first and second ventilation vertical plates, oppositely arranged control and support vertical plates, a top plate and a second bottom plate, the control vertical plate, the first ventilation vertical plate, the support vertical plate and the second ventilation vertical plate are sequentially connected in a head-to-tail manner to form the base around the top plate and the second bottom plate, a plurality of footings are arranged on the outer side of the second bottom plate, and at least one ventilation window is arranged on the first ventilation vertical plate and the second ventilation vertical plate. The motor compartment is fixedly connected with the base through the top plate, and the motor compartment is used to accommodate the first motor and the second motor. The first bottom plate is arranged at the top end of the motor compartment and rotationally connected with the motor compartment through a rotating shaft, and the kneading assembly is fixedly connected with the first bottom plate.

10. The apparatus of claim 9, wherein, The device further comprises a control assembly. The control assembly is arranged in the base and fixedly connected with the second bottom plate. The control assembly is electrically connected with the first motor, the second motor, the vacuum pump and the heating rods. A control device is arranged on the control vertical plate and connected with the control assembly, and the control device comprises at least one of a control panel and a control button.

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