Feeding equipment and electrode preparation device

Abstract

The utility model relates to the technical field of dry method electrode preparation, in particular to feeding equipment and an electrode preparation device. The feeding equipment comprises a stock bin, a charging barrel, a feeding screw rod, a pre-pressing screw rod, a first driving unit, a second driving unit, a torque monitoring piece and a controller, the stock bin is communicated with the charging barrel; the feeding screw rod is arranged in the stock bin, and the first driving unit drives the feeding screw rod to rotate so as to convey materials in the stock bin into the charging barrel; the pre-pressing screw rod is arranged in the charging barrel, and the second driving unit drives the pre-pressing screw rod to rotate so as to convey materials entering the charging barrel to the output end of the charging barrel. And through the arrangement mode that the double screws are matched with the double driving units, the conveying efficiency of the materials can be improved. And the torque monitoring part and the controller are matched with the second driving unit with the adjustable torque to adjust the rotating speed of the pre-pressing screw rod, so that the pressure between the discharging end of the charging barrel and the subsequent pressing roller assembly is constant, and the uniformity, the surface density consistency and the batch stability of the subsequently prepared membranes are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of dry electrode preparation, in particular to a feeding device and an electrode preparation apparatus. Background Art

[0002] Lithium-ion batteries are secondary batteries that rely on the movement of lithium ions between the positive and negative electrodes to work. They are widely used in electronic products and new energy vehicles. Currently, the mainstream production method of lithium-ion batteries is to use wet coating technology, which has the disadvantages of serious energy waste, high cost and environmental pollution in the production process.

[0003] In order to solve the problems existing in wet coating technology, researchers have proposed solvent-free dry electrode preparation technology. Solvent-free dry electrode preparation technology does not require the use of any solvent, thus solving some problems existing in wet coating technology. And dry electrode preparation technology has the advantages of reducing costs, inhibiting stratification, no restrictions on electrode thickness, and being suitable for all-solid-state batteries.

[0004] The dry electrode preparation technology is to evenly mix the powder materials such as active materials, conductive agents and binders, and use air flow crushing, high-speed dispersion or extrusion kneading and other processing methods to fiberize the binder to prepare a dry electrode powder mixture in the form of flakes, blocks or flocs. After that, the dry electrode powder mixture is fed into the roller gap of the horizontally arranged rollers, and after multiple heating and rolling, a membrane of the desired thickness is finally obtained. After the membrane is prepared, the membrane and the current collector are hot-pressed and compounded to obtain a dry electrode.

[0005] In the prior art, the feeding of dry electrode powder mixture is generally carried out by manual feeding, vibration feeding or screw free fall feeding. The above-mentioned feeding methods are difficult to ensure the uniformity of feeding. Problems such as funnel flow, arch interruption and collapse are prone to occur during the feeding process, resulting in uneven feeding. The final diaphragm has problems in thickness, compaction density and surface density, affecting battery performance and reliability. Utility Model Content

[0006] (I) The problem to be solved by the present invention is that the existing feeding method is difficult to ensure uniformity during the feeding process, which affects the performance and reliability of the final battery.

[0007] (II) Technical solution

[0008] In order to solve the above technical problems, the utility model provides a feeding device in one aspect, including: a silo, a barrel, a feeding screw, a pre-pressing screw, a first driving unit, a second driving unit, a torque monitoring component and a controller;

[0009] The silo is in communication with the barrel, and the silo is used to store materials;

[0010] The feeding screw is arranged in the silo, and the first driving unit is used to drive the feeding screw to rotate, so that the material in the silo is transported into the barrel through the rotation of the feeding screw;

[0011] The pre-pressing screw is disposed in the barrel, and the second driving unit is used to drive the pre-pressing screw to rotate, so that the material entering the barrel is transported to the output end of the barrel through the rotation of the pre-pressing screw;

[0012] The torque monitoring component and the second drive unit are both electrically connected to the controller. The torque monitoring component is used to monitor the torque of the second drive unit. The controller controls the operating state of the second drive unit according to the torque information of the second drive unit.

[0013] Further, it also includes a pressure monitoring component;

[0014] The pressure monitoring component is arranged at the discharge end of the barrel and is used to monitor the discharge pressure at the discharge end of the barrel;

[0015] The pressure monitoring component is electrically connected to the controller, and the controller controls the operating state of the second driving unit according to the discharge pressure information of the discharge end of the barrel.

[0016] Furthermore, the feeding screw and the pre-pressing screw are arranged vertically.

[0017] Furthermore, the pre-stressing screw is any one of an equidistant and equal-diameter screw, a variable-pitch and variable-diameter screw, a variable-pitch and equal-diameter screw, and an equidistant and variable-diameter screw.

[0018] Furthermore, it also includes an anti-arch component, which is arranged on the silo and is used to prevent the material in the silo from arching.

[0019] Further, the anti-arch assembly includes a third driving unit, a stirring shaft and a stirring paddle;

[0020] The stirring paddle is arranged on the stirring shaft, and the third driving unit is connected to the stirring shaft in transmission and drives the stirring shaft to rotate.

[0021] Another aspect of the present invention is to provide an electrode preparation device, comprising the feeding device described in any of the above embodiments.

[0022] Furthermore, the electrode preparation device also includes a pressing roller assembly;

[0023] The pressing roller assembly comprises a first pressing roller and a second pressing roller which are arranged at an interval, an extrusion space is formed between the first pressing roller and the second pressing roller, and the discharge end of the barrel is communicated with the extrusion space.

[0024] Furthermore, the electrode preparation device comprises a plurality of the feeding devices, and all the feeding devices are arranged in sequence along the axial direction of the first pressing roller and / or the second pressing roller.

[0025] Furthermore, the electrode preparation device also includes a coating die head, and the discharge end of the barrel is connected to the feed end of the coating die head.

[0026] Beneficial effects of the utility model:

[0027] The utility model provides a feeding device, comprising: a silo, a barrel, a feeding screw, a pre-pressing screw, a first drive unit, a second drive unit, a torque monitoring device and a controller; the silo is connected to the barrel, and the silo is used to store materials; the feeding screw is arranged in the silo, and the first drive unit is used to drive the feeding screw to rotate, and the material in the silo is transported to the barrel through the rotation of the feeding screw; the pre-pressing screw is arranged in the barrel, and the second drive unit is used to drive the pre-pressing screw to rotate, and the material entering the barrel is transported to the output end of the barrel through the rotation of the pre-pressing screw; the torque monitoring device and the second drive unit are both electrically connected to the controller, the torque monitoring device is used to monitor the torque of the second drive unit, and the controller controls the operating state of the second drive unit according to the torque information of the second drive unit.

[0028] The twin-screw and dual-drive unit configuration can improve the material conveying efficiency. The torque monitoring component, controller, and second torque-adjustable drive unit can adjust the speed of the pre-pressing screw, thereby achieving a constant pressure between the discharge end of the barrel and the subsequent roller assembly, ensuring the uniformity, surface density consistency, and batch stability of the subsequent diaphragm. Compared with the existing technology, the subsequent battery performance is better and has higher reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of the feeding equipment provided by the embodiment of the utility model;

[0031] Figure 2 A schematic diagram of the structure of the feeding device and the pressure roller assembly provided in the embodiment of the utility model;

[0032] Figure 3 A schematic diagram of the structure of the pre-compression screw provided in the embodiment of the utility model when the pre-compression screw adopts a variable diameter screw;

[0033] Figure 4 A schematic diagram of the structure of a pre-compression screw provided in an embodiment of the utility model when the pre-compression screw adopts a variable pitch screw;

[0034] Figure 5 A schematic diagram of the structure of a feeding device when an anti-arch assembly is provided in a silo provided in an embodiment of the utility model;

[0035] Figure 6 A schematic diagram of the structure of the electrode preparation device provided in the embodiment of the utility model when it includes multiple feeding devices;

[0036] Figure 7 A schematic diagram of the structure of the feeding device and the coating die head provided in the embodiment of the utility model;

[0037] Figure 8 A schematic diagram of the structure of the electronic control components of the feeding equipment provided in an embodiment of the utility model.

[0038] Icons: 11-silo; 12-barrel; 13-feeding screw; 14-preloading screw; 15-first drive unit; 16-second drive unit; 171-stirring shaft; 172-stirring paddle; 173-third drive unit; 18-feeding channel;

[0039] 21-pressing roller assembly; 211-first pressing roller; 212-second pressing roller; 213-extrusion space; 22-coating die head;

[0040] 31-material; 32-diaphragm;

[0041] 41-controller; 42-torque monitoring component; 43-pressure monitoring component. DETAILED DESCRIPTION

[0042] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0043] like Figures 1 to 8As shown, on one hand, an embodiment of the utility model provides a feeding device, including: a silo 11, a barrel 12, a feeding screw 13, a pre-pressing screw 14, a first driving unit 15, a second driving unit 16, a torque monitoring device 42 and a controller 41; the silo 11 is connected to the barrel 12, and the silo 11 is used to store materials 31; the feeding screw 13 is arranged in the silo 11, and the first driving unit 15 is used to drive the feeding screw 13 to rotate, and the material 31 of the silo 11 is transported to the barrel 12 through the rotation of the feeding screw 13; the pre-pressing screw 14 is arranged in the barrel 12, and the second driving unit 16 is used to drive the pre-pressing screw 14 to rotate, and the material 31 entering the barrel 12 is transported to the output end of the barrel 12 through the rotation of the pre-pressing screw 14; the torque monitoring device 42 and the second driving unit 16 are both electrically connected to the controller 41, the torque monitoring device 42 is used to monitor the torque of the second driving unit 16, and the controller 41 controls the operating state of the second driving unit 16 according to the torque information of the second driving unit 16.

[0044] The feeding equipment provided in this embodiment is used to convey the dry electrode powder mixture to the pressure roller assembly 21, or to the coating die 22. Among them, the silo 11 is used to store the material 31, and the material 31 is the above-mentioned dry electrode powder mixture. The barrel 12 is connected to the silo 11, and the discharge end of the silo 11 is connected to the feed end of the barrel 12. Furthermore, the discharge end of the silo 11 is located on the lower side of the side wall of the silo 11, and the feed end of the barrel 12 is located on the side wall of the barrel 12, and the discharge end of the silo 11 and the feed end of the barrel 12 are connected through the feeding channel 18. The feeding screw 13 is arranged in the silo 11, and the feeding screw 13 is located at the bottom of the silo 11; one end of the feeding screw 13 extends into the feeding channel 18, and the other end is connected to the first driving unit 15 outside the silo 11 by transmission. The first driving unit 15 drives the feeding screw 13 to rotate, so that the material 31 in the silo 11 can be transported to the barrel 12 through the feeding channel 18. The pre-pressing screw 14 is arranged in the barrel 12, and the second driving unit 16 is arranged at one end of the barrel 12, and the other end is the discharge end of the barrel 12. The second driving unit 16 is connected to the pre-pressing screw 14 by transmission. The second driving unit 16 drives the pre-pressing screw 14 to rotate, so that the material 31 in the silo 11 can be transported to the discharge end of the barrel 12.

[0045] Optionally, in this embodiment, the first drive unit 15 and the second drive unit 16 are both a combination of a motor and a reducer.

[0046] Optionally, in this embodiment, the feeding screw 13 includes a screw shaft and a spiral element mounted on the screw shaft. The spiral element is driven to rotate by the screw shaft, thereby realizing the transportation of the material 31. The structure of the pre-loading screw 14 is almost the same as that of the feeding screw 13, except that the spiral element is different. The structure of the pre-loading screw 14 is described in detail below.

[0047] Furthermore, in this embodiment, the output torque of the second drive unit 16 can be adjusted to ensure constant pressure between the discharge end of the barrel 12 and the subsequent pressure roller assembly 21, thereby improving the uniformity, surface density consistency and batch stability of the subsequently produced diaphragm 32.

[0048] Specifically, in this embodiment, the feeding device further includes a torque monitoring component 42, which is used to monitor the output torque of the second drive unit 16. In addition, the torque monitoring component 42 and the second drive unit 16 are both electrically connected to the controller 41, and the controller 41 can receive the torque information of the second drive unit 16 monitored by the torque monitoring component 42, thereby controlling the rotation speed of the second drive unit 16 according to the torque information of the second drive unit 16.

[0049] For example, a torque threshold is preset in the controller 41. When the torque information of the second drive unit 16 fed back by the torque monitoring component 42 to the controller 41 is higher than the torque threshold, the controller 41 controls the second drive unit 16 to reduce the speed of the pre-pressing screw 14, or stops the pre-pressing screw 14 from rotating. When the torque information of the second drive unit 16 fed back by the torque monitoring component 42 to the controller 41 is higher than the torque threshold, the controller 41 controls the second drive unit 16 to increase the speed of the pre-pressing screw 14. By continuously adjusting the speed of the pre-pressing screw 14, the pressure between the discharge end of the barrel 12 and the subsequent pressure roller assembly 21 is ensured to be constant.

[0050] Optionally, in this embodiment, the torque sensor may be a torque sensor disposed on the motor shaft, or a current sensor for monitoring the motor current, both of which can achieve the purpose of monitoring the output torque of the second drive unit 16 .

[0051] The feeding equipment provided in this embodiment can improve the conveying efficiency of the material 31 by setting up a twin screw with a twin drive unit. The torque monitoring part 42 and the controller 41 can adjust the speed of the pre-pressing screw 14 in conjunction with the torque-adjustable second drive unit 16, so as to achieve a constant pressure between the discharge end of the barrel 12 and the subsequent pressure roller assembly 21, thereby ensuring the uniformity, surface density consistency and batch stability of the subsequent diaphragm 32. Compared with the prior art, the subsequent battery performance is better and has higher reliability.

[0052] Furthermore, the feeding device provided by the embodiment of the utility model is as follows: Figure 8As shown, it also includes a pressure monitoring component 43; the pressure monitoring component 43 is arranged at the discharge end of the barrel 12, and is used to monitor the discharge pressure of the discharge end of the barrel 12; the pressure monitoring component 43 is electrically connected to the controller 41, and the controller 41 controls the operating state of the second drive unit 16 according to the discharge pressure information of the discharge end of the barrel 12.

[0053] In this embodiment, the feeding equipment also includes a pressure monitoring device 43 for monitoring the discharge pressure at the discharge end of the barrel 12. The pressure monitoring device 43 is used to monitor the discharge pressure at the discharge end of the barrel 12. The controller 41 adjusts the second drive unit 16 according to the discharge pressure at the discharge end of the barrel 12, so that the rotation speed of the pre-stressing screw 14 is adjusted in real time according to the discharge pressure at the discharge end of the barrel 12. By continuously adjusting the rotation speed of the pre-stressing screw 14, the pressure between the discharge end of the barrel 12 and the subsequent pressure roller assembly 21 is ensured to be constant.

[0054] Specifically, a pressure threshold interval is preset in the controller 41. When the discharge pressure information at the discharge end of the barrel 12 fed back to the controller 41 by the pressure monitoring device 43 is higher than the preset pressure threshold interval, the controller 41 controls the second drive unit 16 to reduce the rotation speed of the pre-loading screw 14, or stops the pre-loading screw 14 from rotating; when the discharge pressure information at the discharge end of the barrel 12 fed back to the controller 41 by the pressure monitoring device 43 is lower than the preset pressure threshold interval, the controller 41 controls the second drive unit 16 to increase the rotation speed of the pre-loading screw 14, thereby ensuring that the pressure between the discharge end of the barrel 12 and the subsequent pressure roller assembly 21 is constant.

[0055] In this embodiment, the torque monitoring component 42 and the pressure monitoring component 43 cooperate to achieve a "double insurance" of controlling the pressure between the discharge end of the barrel 12 and the subsequent pressure roller assembly 21 to be constant.

[0056] Optionally, in the present embodiment, the pressure monitoring component 43 may be a pressure sensor, or a pressure gauge, etc., which can achieve the purpose of monitoring the discharge pressure at the discharge end of the barrel 12 .

[0057] The feeding equipment provided by the embodiment of the utility model is as follows Figure 1 As shown, the feeding screw 13 and the pre-pressing screw 14 are vertically arranged to improve the conveying efficiency of the material 31.

[0058] Specifically, in this embodiment, the axis of the barrel 12 is perpendicular to the axis of the feeding channel 18, the axis of the pre-loading screw 14 coincides with the axis of the barrel 12, and the axis of the feeding screw 13 coincides with the axis of the feeding channel 18, thereby realizing the vertical arrangement of the feeding screw 13 and the pre-loading screw 14.

[0059] The feeding equipment provided by the embodiment of the utility model is as follows Figures 1 to 4As shown, the pre-stressing screw 14 is any one of an equidistant and equal-diameter screw, a variable-pitch and variable-diameter screw, a variable-pitch and equal-diameter screw, and an equidistant and variable-diameter screw.

[0060] In this embodiment, the pre-loading screw 14 adopts any one of an equidistant and equal-diameter screw, a variable-pitch and variable-diameter screw, a variable-pitch and equal-diameter screw, and an equidistant and variable-diameter screw, so that the feeding equipment can adapt to materials 31 of different properties, thereby improving the flexibility and adaptability of the feeding equipment.

[0061] Specifically, in this embodiment, when the pre-loading screw 14 is an equidistant and equal-diameter screw, that is, the pitch and diameter of the pre-loading screw 14 will not change with the length of the screw.

[0062] In this embodiment, when the preloading screw 14 is a variable pitch screw, that is, the pitch of the preloading screw 14 changes with the length of the screw. Figure 4 The preloading screw 14 in the embodiment is a variable pitch screw. The conveying capacity of the preloading screw 14 can be adjusted by changing the pitch of the spiral element. When the pitch increases, the conveying speed of the material 31 increases and the conveying capacity also increases. Conversely, when the pitch decreases, the conveying speed of the material 31 decreases and the conveying capacity also decreases. By changing the pitch, it is also possible to adapt to the conveying of materials 31 of different types and different particle sizes. For example, for materials 31 with high viscosity, a preloading screw 14 with a larger pitch can be used for conveying to reduce the accumulation of the material 31. For materials 31 that are easy to flow, a preloading screw 14 with a smaller pitch can be used to increase the stability during conveying.

[0063] In this embodiment, when the preloading screw 14 is a variable diameter screw, that is, the diameter of the preloading screw 14 changes with the length of the screw. Figure 3 The preloading screw 14 is a variable diameter screw. By setting the preloading screw 14 as a variable diameter screw, its conveying capacity is stronger and it is more suitable for conveying large particles or bulk materials 31. In addition, setting the preloading screw 14 as a variable diameter screw can adapt to a higher conveying distance and conveying angle.

[0064] In this embodiment, the variable pitch and variable diameter screw is a screw whose diameter and pitch both change with the length of the screw. When the pre-loading screw 14 is a variable pitch and variable diameter screw, it has a higher conveying efficiency for viscous media.

[0065] The feeding equipment provided by the embodiment of the utility model is as follows Figure 5 As shown, it also includes an anti-arch component, which is arranged on the silo 11 and is used to prevent the material 31 in the silo 11 from arching.

[0066] In this embodiment, it is mentioned above that the material 31 is a dry electrode powder mixture. The material 31 in the silo 11 is prone to arching when being transported outward, causing blockage of the material 31. For this reason, an anti-arching component is provided to prevent the material 31 in the silo 11 from arching and improve the fluidity of the material 31.

[0067] Optionally, in this embodiment, the anti-arch component can be arranged in the silo 11 or outside the silo 11. When the anti-arch component is arranged in the silo 11, the anti-arch component prevents the material 31 in the silo 11 from arching by stirring the material 31 in the silo 11. Specifically, Figure 5 As shown, the anti-arching assembly includes a third driving unit 173, a stirring shaft 171 and a stirring paddle 172. The stirring paddle 172 may be U-shaped or paddle-shaped, and a plurality of stirring paddles 172 are provided, and all stirring paddles 172 are arranged at intervals on the stirring shaft 171. The third driving unit 173 is a combination of a motor and a reducer, and the third driving unit 173 is in transmission connection with the stirring shaft 171, and drives the stirring shaft 171 to rotate, thereby preventing the material 31 in the silo 11 from arching by stirring the material 31.

[0068] Preferably, in this embodiment, the stirring shaft 171 is arranged parallel to the feeding screw 13, so as to improve the stirring effect of the stirring paddle 172 while preventing the stirring shaft 171 and the stirring paddle 172 from affecting the conveying of the material 31 in the silo 11 to the barrel 12.

[0069] Preferably, in this embodiment, the first drive unit 15 and the third drive unit 173 are arranged on the same side of the silo 11 to facilitate the arrangement of the feeding equipment.

[0070] Optionally, in this embodiment, when the anti-arch component is disposed outside the silo 11, the anti-arch component can also be a pneumatic or electric percussion hammer disposed outside the silo 11, which vibrates the silo 11 by striking the silo 11, thereby preventing the material 31 in the silo 11 from arching.

[0071] Another aspect of the present invention provides an electrode preparation device, comprising the feeding device described in any of the above embodiments.

[0072] Among them, the electrode preparation device using the above-mentioned feeding equipment produces the same effect as the above-mentioned feeding equipment, which will not be repeated here.

[0073] Optionally, the electrode preparation device provided in the embodiment of the utility model is as follows: Figures 2 to 6As shown, it also includes a pressure roller assembly 21; the pressure roller assembly 21 includes a first pressure roller 211 and a second pressure roller 212 that are spaced apart, an extrusion space 213 is formed between the first pressure roller 211 and the second pressure roller 212, and the discharge end of the barrel 12 is connected to the extrusion space 213.

[0074] In this embodiment, the above-mentioned feeding device can cooperate with the pressure roller assembly 21, and the pressure roller assembly 21 is arranged below the feeding device. Among them, the pressure roller assembly 21 includes a first pressure roller 211 and a second pressure roller 212, and the first pressure roller 211 and the second pressure roller 212 are arranged at intervals to define an extrusion space 213 between the first pressure roller 211 and the second pressure roller 212. In order to ensure the uniformity, surface density consistency and batch stability of the subsequent film 32, the axes of the first pressure roller 211 and the second pressure roller 212 are parallel. The discharge end of the barrel 12 is connected to the extrusion space 213, and the material 31 discharged from the discharge end of the barrel 12 enters the extrusion space 213, and the film-shaped material 31 is formed under the action of the first pressure roller 211 and the second pressure roller 212. Through repeated extrusion and adjusting the distance between the first pressure roller 211 and the second pressure roller 212, a film 32 of a predetermined thickness can be finally obtained.

[0075] The electrode preparation device provided in the embodiment of the utility model is as follows Figure 6 As shown, the electrode preparation device includes a plurality of the feeding devices, and all of the feeding devices are arranged in sequence along the extension direction of the extrusion space 213.

[0076] Preferably, in this embodiment, when the axial dimensions of the first pressing roller 211 and the second pressing roller 212 are relatively long, a plurality of the above-mentioned feeding devices may be provided, and all the feeding devices extend along the axial direction of the first pressing roller 211 and / or the second pressing roller 212, thereby improving the applicability of the electrode preparation apparatus.

[0077] Optionally, in this embodiment, the port at the discharge end of the barrel 12 is in an arc shape that matches the first pressure roller 211 and the second pressure roller 212, so as to shorten the distance from the discharge end of the barrel 12 to the extrusion space 213 and avoid the problem of material spillage.

[0078] Optionally, the electrode preparation device provided in the embodiment of the utility model is as follows: Figure 7 As shown, the electrode preparation device further includes a coating die head 22 , and the discharge end of the barrel 12 is connected to the feed end of the coating die head 22 .

[0079] In this embodiment, the feeding device cooperates with the pressure roller assembly 21 and can also cooperate with the coating die head 22. The feeding device is arranged above the coating die head 22, and the discharge end of the barrel 12 is connected with the feed end of the coating die head 22. The material 31 discharged by the feeding device is transported to the coating die head 22. By cooperating with the feeding device and the coating die head 22, the production efficiency can be further improved.

[0080] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0081] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A feeding device, characterized in that: include: A silo (11), a barrel (12), a feeding screw (13), a pre-pressing screw (14), a first drive unit (15), a second drive unit (16), a torque monitoring element (42) and a controller (41); The silo (11) is in communication with the barrel (12), and the silo (11) is used to store materials (31); The feeding screw (13) is arranged in the silo (11), and the first driving unit (15) is used to drive the feeding screw (13) to rotate, so that the material (31) in the silo (11) is transported into the barrel (12) through the rotation of the feeding screw (13); The pre-pressing screw (14) is disposed in the barrel (12), and the second driving unit (16) is used to drive the pre-pressing screw (14) to rotate, so that the material (31) entering the barrel (12) is transported to the output end of the barrel (12) through the rotation of the pre-pressing screw (14); The torque monitoring component (42) and the second drive unit (16) are both electrically connected to the controller (41); the torque monitoring component (42) is used to monitor the torque of the second drive unit (16); and the controller (41) controls the operating state of the second drive unit (16) according to the torque information of the second drive unit (16).

2. The feeding device according to claim 1, characterized in that: Also included is a pressure monitoring component (43); The pressure monitoring component (43) is arranged at the discharge end of the barrel (12) and is used to monitor the discharge pressure at the discharge end of the barrel (12); The pressure monitoring component (43) is electrically connected to the controller (41), and the controller (41) controls the operating state of the second driving unit (16) according to the discharge pressure information of the discharge end of the barrel (12).

3. The feeding device according to claim 1, characterized in that: The feeding screw (13) and the pre-pressing screw (14) are arranged vertically.

4. The feeding device according to claim 1, characterized in that: The pre-compression screw (14) is any one of an equidistant and equal-diameter screw, a variable-pitch and variable-diameter screw, a variable-pitch and equal-diameter screw, and an equidistant and variable-diameter screw.

5. The feeding device according to claim 1, characterized in that: It also includes an anti-arching component, which is arranged on the silo (11) and is used to prevent the material (31) in the silo (11) from arching.

6. The feeding device according to claim 5, characterized in that The anti-arch assembly comprises a third driving unit (173), a stirring shaft (171) and a stirring paddle (172); The stirring paddle (172) is disposed on the stirring shaft (171), and the third driving unit (173) is transmission-connected to the stirring shaft (171) and drives the stirring shaft (171) to rotate.

7. An electrode preparation device, characterized in that: Comprising the feeding device as described in any one of claims 1 to 6.

8. The electrode preparation device according to claim 7, characterized in that: The electrode preparation device also includes a pressure roller assembly (21); The pressing roller assembly (21) comprises a first pressing roller (211) and a second pressing roller (212) which are arranged at an interval, an extrusion space (213) is formed between the first pressing roller (211) and the second pressing roller (212), and the discharge end of the barrel (12) is connected to the extrusion space (213).

9. The electrode preparation device according to claim 8, characterized in that: The electrode preparation device comprises a plurality of the feeding devices, and all of the feeding devices are arranged in sequence along the axial direction of the first pressing roller (211) and / or the second pressing roller (212).

10. The electrode preparation device according to claim 7, characterized in that: The electrode preparation device further comprises a coating die head (22), and the discharge end of the barrel (12) is connected to the feed end of the coating die head (22).

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