Electrode film forming device and dry-method electrode production equipment

Abstract

The utility model discloses an electrode film forming device and dry method electrode production equipment. The electrode film forming device comprises a rolling mechanism, a discharging mechanism and a control unit. The rolling mechanism comprises a first pressing roller and a second pressing roller, and a roller gap is defined between the first pressing roller and the second pressing roller; the discharging mechanism is located above the rolling mechanism and comprises a stock bin and a feeding mechanism, the feeding mechanism comprises a feeding roller and a feeding driving mechanism, the feeding roller comprises a roller shaft and a plurality of feeding teeth, the feeding teeth are arranged on the outer circumferential wall of the roller shaft and arranged at intervals in the circumferential direction of the roller shaft, the feeding roller is rotatably arranged at the discharging port, and the feeding driving mechanism drives the feeding driving mechanism to rotate. The feeding driving mechanism is connected with the feeding roller to drive the feeding roller to rotate, and the control unit is electrically connected with the feeding driving mechanism to control the feeding speed mechanism so that the rotating speed of the feeding roller can be adjusted. According to the electrode film forming device, the feeding stability is good, the feeding speed can be adjusted according to requirements, and the electrode film forming quality can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dry electrode production, in particular to an electrode film forming device and a dry electrode production equipment. Background Art

[0002] In the related art, during the dry electrode production process, the feeding into the rolling mechanism mainly relies on manual shoveling, which is time-consuming and laborious, and requires a large amount of manual operation. Moreover, if the powder is too little, holes will appear in the dry electrode film, affecting its integrity. If the powder is too much, a powder bridging phenomenon will occur in the roll gap, resulting in roll gap blockage and affecting the preparation of the dry electrode film. Therefore, relevant personnel need to monitor the powder amount in the roll gap of the rolling mechanism. The monitoring intensity of personnel is high and the monitoring is relatively subjective, which cannot ensure the feeding stability into the roll gap of the rolling mechanism, affecting the working stability of the electrode film forming device and the forming quality of the electrode film. Therefore, improvement is needed. Summary of the Utility Model

[0003] In view of the above problems, the utility model provides an electrode film forming device and a dry electrode production equipment. The electrode film forming device can realize automatic feeding into the rolling mechanism, has good feeding stability and can adjust the feeding speed according to requirements, which can improve the working stability of the electrode film forming device and is beneficial to improving the forming quality of the electrode film.

[0004] In the first aspect, the utility model provides an electrode film forming device, including: a rolling mechanism, the rolling mechanism includes a first pressing roller and a second pressing roller, a roll gap is defined between the first pressing roller and the second pressing roller, and the rolling mechanism is used for rolling electrode powder into an electrode film; a feeding mechanism, the feeding mechanism is located above the rolling mechanism and includes a feed bin and a feeding mechanism. The feed bin has a feed inlet and a discharge outlet, and the feeding mechanism is used for conveying the electrode powder in the feed bin through the discharge outlet into the roll gap. The feeding mechanism includes a feeding roller and a feeding driving mechanism. The feeding roller includes a roller shaft and a plurality of feeding teeth. The plurality of feeding teeth are arranged on the outer peripheral wall of the roller shaft and are spaced along the circumferential direction of the roller shaft. The feeding roller is rotatably arranged at the discharge outlet, and the feeding driving mechanism is connected to the feeding roller to drive the feeding roller to rotate; a control unit, the control unit is electrically connected to the feeding mechanism to control the feeding speed of the feeding mechanism so that the rotation speed of the feeding roller is adjustable.

[0005] In the above technical solution, by making the electrode film forming device include a feeding mechanism, the feeding mechanism can automatically feed materials into the rolling mechanism, eliminating the need for manual feeding into the rolling mechanism in the related art, reducing the amount of manual operation and labor intensity. Moreover, compared with manual feeding, the automatic feeding by the feeding mechanism can ensure better feeding stability and improve the working stability of the electrode film forming device. Also, by making the feeding speed of the feeding mechanism adjustable and electrically connecting the control unit to the feeding mechanism, the control unit can control the feeding speed of the feeding mechanism. This not only ensures stable feeding into the roll gap of the rolling mechanism but also allows adjustment of the feeding speed according to requirements, improving the integrity of the electrode film formed by rolling the electrode powder and reducing the occurrence of powder bridging in the roll gap, which may cause roll gap blockage and affect the process, thus facilitating the improvement of the forming quality of the electrode film. By making the feeding drive mechanism drive the feeding roller to rotate, automatic feeding can be achieved with a simple feeding mechanism. And by electrically connecting the control unit to the feeding drive mechanism, the control unit can control the feeding speed by controlling the rotation speed of the feeding roller, providing more accurate and convenient control of the feeding speed. By making the feeding roller include a roller shaft and a plurality of feeding teeth, during the rotation of the feeding roller, the electrode powder in the bin can be conveniently pushed out through the discharge port into the roll gap by the plurality of feeding teeth, and the feeding process of the feeding roller can be made stable and controllable.

[0006] In some embodiments, some of the feeding teeth are adapted to contact the inner wall of the bin.

[0007] In the above technical solution, by making some of the feeding teeth contact the inner wall of the bin, the feeding teeth have a scraping function. During the rotation of the feeding roller, the feeding teeth can scrape off the electrode powder adhering to the inner wall of the bin, preventing the waste or difficult cleaning caused by the long-term adhesion of the electrode powder to the inner wall of the bin.

[0008] In some embodiments, a part of the feeding roller is located inside the bin, and a part of the feeding roller is located outside the bin and between the bin and the first pressing roller.

[0009] In the above technical solution, by making a part of the feeding roller located inside the bin, the feeding roller can pick up the electrode powder in the bin more fully, preventing the spillage of the electrode powder in the bin. By making a part of the feeding roller located outside the bin and between the bin and the first pressing roller, when the feeding roller rotates, it can carry out the electrode powder and make the electrode powder fall on the first pressing roller, reducing the spillage of the electrode powder after being carried out by the feeding roller.

[0010] In some embodiments, the electrode film forming device further includes: a material quantity sensor for detecting the amount of electrode powder accumulated between the first pressure roller and the second pressure roller. The material quantity sensor is electrically connected to the control unit, and the control unit is configured to control the feeding speed of the feeding mechanism according to the detection result of the material quantity sensor.

[0011] In the above technical solution, by making the electrode film forming device further include a material quantity sensor and electrically connecting the material quantity sensor to the control unit, when the electrode film forming device is working, the material quantity sensor can detect the amount of electrode powder accumulated between the first pressure roller and the second pressure roller and transmit a signal to the control unit. The control unit controls the feeding speed of the feeding mechanism according to the detection result of the material quantity sensor, realizing automatic control of the feeding speed, which can reduce the operation amount and monitoring pressure of personnel; moreover, it can also control the feeding speed more timely and accurately, improve the stability of material supply more fully, adjust the feeding speed according to requirements, improve the working stability of the electrode film forming device, and is beneficial to improving the forming quality of the electrode film.

[0012] In some embodiments, the material quantity sensor is located directly above the roll gap, and the material quantity sensor is used to detect the accumulation height of the electrode powder accumulated between the first pressure roller and the second pressure roller.

[0013] In the above technical solution, by making the material quantity sensor detect the accumulation height of the electrode powder accumulated between the first pressure roller and the second pressure roller, and the accumulation height of the electrode powder is positively correlated with the accumulation amount of the electrode powder. In this way, the material quantity sensor can monitor the accumulation amount of the electrode powder at all times and transmit the detected data to the control unit, without the need to detect the accumulation height of the electrode powder by the method of manual visual observation in the related art. The accumulation height of the electrode powder is easier to detect and can more easily reflect the accumulation amount of the electrode powder; and the detected data of the accumulation height of the electrode powder is more accurate and can more accurately reflect the accumulation amount of the electrode powder.

[0014] In some embodiments, the control unit is configured to control the feeding speed of the feeding mechanism according to the detection result of the material quantity sensor so as to control the accumulation height of the electrode powder accumulated between the first pressure roller and the second pressure roller within 20 mm to 30 mm.

[0015] In the above technical solution, by controlling the feeding speed of the feeding mechanism according to the detection result of the material quantity sensor, the stacking height of the electrode powder accumulated between the first pressing roller and the second pressing roller can be made not less than 20 mm, which can avoid too little powder accumulated in the roll gap and prevent the prepared electrode film from having holes or other problems that affect its integrity; by making the stacking height of the electrode powder accumulated between the first pressing roller and the second pressing roller not exceed 30 mm, it can avoid too much powder accumulated in the roll gap and prevent the accumulated powder from bridging, which may cause the roll gap to be blocked and affect the preparation of the electrode film. By making the control unit control the feeding speed of the feeding mechanism according to the detection result of the material quantity sensor, the powder accumulated in the roll gap can be appropriate, making the prepared electrode film complete, and also avoiding the powder from being blocked in the roll gap and affecting the preparation of the electrode film.

[0016] In some embodiments, the plane where the center of the first pressing roller and the center of the second pressing roller are located is the reference plane, and the height distance between the material quantity sensor and the reference plane is 40 mm to 60 mm.

[0017] In the above technical solution, by making the height distance between the material quantity sensor and the reference plane not less than 40 mm, the risk that the material quantity sensor interferes with the first pressing roller or the second pressing roller, resulting in the first pressing roller or the second pressing roller being unable to rotate and operate normally, can be reduced, and the risk that the material quantity sensor interferes with the motor powder accumulated between the first pressing roller and the second pressing roller can also be reduced; by making the height distance between the material quantity sensor and the reference plane not more than 60 mm, the detection of the material quantity of the electrode powder by the material quantity sensor can be more accurate.

[0018] In some embodiments, the discharge port is located at the bottom of the material bin, and the feed port is located at the top of the material bin; and / or, the material bin is in the shape of a conical cylinder.

[0019] In the above technical solution, by making the discharge port located at the bottom of the material bin and the feed port located at the top of the material bin, relevant personnel can feed materials from the top of the material bin, and the electrode powder moves downward in the material bin under its own gravity and finally leaves the material bin from the discharge port. By making the material bin in the shape of a conical cylinder, the feed port can be large enough when relevant personnel add materials, making the feeding operation more convenient; and it can appropriately slow down the speed of the motor powder leaving the material bin, making the feeding speed of the electrode powder more controllable.

[0020] In some embodiments, the feeding mechanism further includes a vibration dispersion mechanism, which is located above the feeding mechanism and between the feed port and the feeding mechanism, and the vibration dispersion mechanism is used for vibrating and dispersing the electrode powder.

[0021] In the above technical solution, by making the blanking mechanism further include a vibration dispersion mechanism, when the electrode film forming device is working, the vibration dispersion mechanism can be vibrated to disperse the agglomerated electrode powder on the vibration dispersion mechanism, reducing the bridging phenomenon of the powder transported into the roll gap caused by powder agglomeration, and more fully avoiding the difficulty of blanking or the difficulty of preparing the dry electrode film caused by powder blockage.

[0022] In some embodiments, the vibration dispersion mechanism includes a vibrating screen, and the vibrating screen can vibrate in the vertical direction and / or the vibrating screen can vibrate in the horizontal direction.

[0023] In the above technical solution, by making the vibrating screen vibrate in the vertical direction, the electrode powder on the vibration dispersion mechanism can be more fully dispersed, reducing the problem of easy blockage caused by powder agglomeration due to the powder bridging phenomenon, and more fully avoiding the difficulty of blanking or the difficulty of preparing the dry electrode film caused by powder blockage; by making the vibrating screen vibrate in the left-right direction, the electrode powder on the vibration dispersion mechanism can be more fully dispersed, reducing the problem of easy blockage caused by powder agglomeration due to the powder bridging phenomenon, and more fully avoiding the difficulty of blanking or the difficulty of preparing the dry electrode film caused by powder blockage.

[0024] In a second aspect, the present invention provides a dry electrode production device, including: the electrode film forming device according to the first aspect of the present invention.

[0025] In the above technical solution, by including the electrode film forming device according to the first aspect of the present invention, the electrode film forming device can adjust the feeding speed according to requirements, which can improve the working stability of the electrode film forming device and is beneficial to improving the forming quality of the electrode film.

[0026] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 is a schematic diagram of an electrode film forming device according to some embodiments of the present invention.

[0029] Reference numerals:

[0030] 100, electrode film forming device;

[0031] 10, rolling mechanism; 11, first pressure roller; 12, second pressure roller; 13, roll gap;

[0032] 20. Blanking mechanism; 21. Bin; 22. Inlet; 23. Outlet; 24. Feeding mechanism; 25. Feeding roller; 26. Roller shaft; 27. Feeding teeth; 28. Vibration dispersion mechanism; 29. Vibrating screen; 30. Material quantity sensor;

[0033] 40. Reference plane. Detailed implementation manner

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] Unless otherwise defined, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs; the terms used in the description of the present utility model in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model; the terms "including" and "having" and any variations thereof in the specification and claims of the present utility model and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present utility model or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0036] Referring to "embodiment" in the present utility model means that a specific feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present utility model. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] In the present utility model, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in the present utility model, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0039] In the embodiments of the present utility model, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of the present utility model shown in the drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are only illustrative and should not constitute any limitation to the present utility model.

[0040] The term "a plurality of" as used in the present utility model refers to two or more (including two).

[0041] In the embodiments of the present utility model, if there is no special instruction, all implementation manners and optional implementation manners of the present utility model can be combined with each other to form a new technical solution.

[0042] In the embodiments of the present utility model, if there is no special instruction, all technical features and optional technical features of the present utility model can be combined with each other to form a new technical solution.

[0043] Currently, from the perspective of the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only applied to energy storage power systems such as hydraulic, thermal, wind, and solar power stations, but also widely used in electric transportation means such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as aerospace. With the continuous expansion of the application fields of power batteries, the market demand for them is also continuously increasing.

[0044] In the related art, during the production process of dry electrodes, the feeding into the rolling mechanism mainly relies on the manual shoveling method, which is time-consuming and laborious, and requires a large amount of operator work. Moreover, since too little powder will cause holes in the dry electrode film, affecting its integrity, and too much powder will cause a powder bridging phenomenon in the roll gap, resulting in roll gap blockage and affecting the preparation of the dry electrode film. Therefore, relevant personnel need to monitor the powder amount in the roll gap of the rolling mechanism. The intensity of personnel monitoring is high and the monitoring is relatively subjective, which cannot ensure the feeding stability into the roll gap of the rolling mechanism, affecting the working stability of the electrode film forming device and also affecting the forming quality of the electrode film. Therefore, improvement is needed.

[0045] Based on this, the present utility model proposes an electrode film forming device, comprising: a rolling mechanism, the rolling mechanism includes a first pressing roller and a second pressing roller, a rolling gap is defined between the first pressing roller and the second pressing roller, and the rolling mechanism is used for rolling electrode powder to form an electrode film; a feeding mechanism, the feeding mechanism is located above the rolling mechanism and includes a feed bin and a feeding mechanism, the feed bin has a feed inlet and a discharge outlet, and the feeding mechanism is used for conveying the electrode powder in the feed bin through the discharge outlet into the rolling gap, the feeding mechanism includes a feeding roller and a feeding driving mechanism, the feeding roller includes a roller shaft and a plurality of feeding teeth, the plurality of feeding teeth are arranged on the outer peripheral wall of the roller shaft and are spaced along the circumferential direction of the roller shaft, the feeding roller is rotatably arranged at the discharge outlet, and the feeding driving mechanism is connected to the feeding roller to drive the feeding roller to rotate; a control unit, the control unit is electrically connected to the feeding mechanism to control the feeding speed of the feeding mechanism so that the rotation speed of the feeding roller is adjustable.

[0046] In the above-mentioned electrode film forming device, by making the electrode film forming device include a feeding mechanism, the feeding mechanism can automatically feed the rolling mechanism, and there is no need to feed the rolling mechanism in the related art by manual feeding, reducing the operation amount of personnel and lowering the labor intensity. Moreover, compared with manual feeding, the automatic feeding of the feeding mechanism can make the feeding stability better and improve the working stability of the electrode film forming device; and, by making the feeding speed of the feeding mechanism adjustable and electrically connecting the control unit to the feeding mechanism, the control unit can control the feeding speed of the feeding mechanism, so that not only the feeding into the rolling gap of the rolling mechanism is stable, but also the feeding speed can be adjusted according to requirements, which can improve the integrity of the electrode film formed by rolling the electrode powder, and can also reduce the phenomenon of powder bridging caused by excessive powder accumulation in the rolling gap, resulting in the blockage of the rolling gap and affecting the process, which is beneficial to improving the forming quality of the electrode film. The following refers to Figure 1 Describe the electrode film forming device according to an embodiment of the present utility model.

[0047] Refer to Figure 1, in a first aspect, the present utility model provides an electrode film forming device 100, which includes: a rolling mechanism 10, a feeding mechanism 20 and a control unit. The rolling mechanism 10 includes a first pressing roller 11 and a second pressing roller 12, and a rolling gap 13 is defined between the first pressing roller 11 and the second pressing roller 12. The rolling mechanism 10 is used for rolling electrode powder to form an electrode film; the feeding mechanism 20 is located above the rolling mechanism 10 and includes a feed bin 21 and a feeding mechanism 24. The feed bin 21 has a feed inlet 22 and a discharge outlet 23. The feeding mechanism 24 is used for conveying the electrode powder in the feed bin 21 through the discharge outlet 23 into the rolling gap 13. The feeding mechanism 24 includes a feeding roller 25 and a feeding driving mechanism. The feeding roller 25 includes a roller shaft 26 and a plurality of feeding teeth 27. The plurality of feeding teeth 27 are arranged on the outer peripheral wall of the roller shaft 26 and are spaced along the circumferential direction of the roller shaft 26. The feeding roller 25 is rotatably arranged at the discharge outlet 23, and the feeding driving mechanism is connected to the feeding roller 25 to drive the feeding roller 25 to rotate; the control unit is electrically connected to the feeding mechanism 24 to control the feeding speed of the feeding mechanism 24 so that the rotation speed of the feeding roller 25 is adjustable.

[0048] Among them, the rolling mechanism 10 includes a first pressing roller 11 and a second pressing roller 12, and a rolling gap 13 is defined between the first pressing roller 11 and the second pressing roller 12. Both the first pressing roller 11 and the second pressing roller 12 can rotate towards the direction of the rolling gap 13 to roll the electrode powder into an electrode film. For example, the rotation speeds of the first pressing roller 11 and the second pressing roller 12 are the same; for another example, the rotation speed of the first pressing roller 11 is greater than the rotation speed of the second pressing roller 12; for yet another example, the rotation speed of the first pressing roller 11 is less than the rotation speed of the second pressing roller 12.

[0049] Among them, the feeding speed of the feeding roller 25 is positively correlated with the rotation speed of the feeding roller 25. By enabling the control unit to control the driving mechanism, and the driving mechanism to control the rotation speed of the feeding roller 25, the feeding speed can be adjusted.

[0050] When the electrode film forming device 100 is working, relevant personnel first pour the electrode powder into the feed bin 21 from the feed inlet 22. The powder located in the feed bin 21 falls between the two feeding teeth 27 in the feed bin 21 under the action of its own gravity. During the process of the feeding roller 25 rotating and feeding, the powder located between the two feeding teeth 27 is pushed by the feeding teeth 27 and leaves the feed bin 21 as the feeding roller 25 rotates downward. As the feeding roller 25 continues to rotate, the powder falls off the feeding teeth 27 under the action of its own gravity, is sent out from the discharge outlet 23 and is conveyed into the rolling gap 13. Finally, the electrode powder is rolled into an electrode film by the rolling mechanism 10.

[0051] In the above technical solution, by making the electrode film forming device 100 include a feeding mechanism 20, the feeding mechanism 20 can automatically feed materials into the rolling mechanism 10, eliminating the need for manual feeding into the rolling mechanism 10 in the related art, reducing the amount of manual operation and labor intensity. Moreover, compared with manual feeding, the automatic feeding by the feeding mechanism 20 provides better feeding stability, improving the working stability of the electrode film forming device 100. Also, by making the feeding speed of the feeding mechanism 24 adjustable and electrically connecting the control unit to the feeding mechanism 24, the control unit can control the feeding speed of the feeding mechanism 24. This not only ensures stable feeding into the roll gap 13 of the rolling mechanism 10 but also allows adjustment of the feeding speed according to requirements, improving the integrity of the electrode film formed by rolling the electrode powder and reducing the occurrence of powder bridging in the roll gap 13 due to excessive powder accumulation, which may block the roll gap 13 and affect the process, thus facilitating the improvement of the forming quality of the electrode film. By making the feeding drive mechanism drive the feeding roller 25 to rotate and electrically connecting the control unit to the feeding drive mechanism, the control unit can control the feeding speed by controlling the rotation speed of the feeding roller 25, enabling more accurate and convenient control of the feeding speed. By making the feeding roller 25 include a roller shaft 26 and a plurality of feeding teeth 27, the feeding speed of the feeding roller 25 is positively correlated with its rotation speed, and the feeding by the feeding roller 25 is more uniform, facilitating relevant personnel to adjust the feeding speed according to the actual situation.

[0052] In some embodiments, referring to Figure 1 , some of the feeding teeth 27 are adapted to contact the inner wall of the material bin 21.

[0053] In the above technical solution, by making some of the feeding teeth 27 contact the inner wall of the material bin 21, the feeding teeth 27 have the function of scraping the material. During the rotation of the feeding roller 25, the feeding teeth 27 can scrape off the electrode powder adhering to the inner wall of the material bin 21, preventing the electrode powder from sticking to the inner wall of the material bin 21 for a long time, which may cause waste or difficult cleaning.

[0054] In some embodiments, referring to Figure 1 , part of the feeding roller 25 is located inside the material bin 21, and part of the feeding roller 25 is located outside the material bin 21 and between the material bin 21 and the first pressing roller 11.

[0055] In the above technical solution, by making part of the feeding roller 25 located inside the material bin 21, the feeding roller 25 can more fully pick up the electrode powder in the material bin 21, preventing the electrode powder in the material bin 21 from spilling. By making part of the feeding roller 25 located outside the material bin 21 and between the material bin 21 and the first pressing roller 11, when the feeding roller 25 rotates, it can carry out the electrode powder and make the electrode powder fall onto the first pressing roller 11, reducing the spillage of the motor powder after being carried out by the feeding roller 25.

[0056] In some embodiments, referring to Figure 1 , the electrode film forming device 100 further includes: a material quantity sensor 30 for detecting the amount of electrode powder accumulated between the first pressing roller 11 and the second pressing roller 12. The material quantity sensor 30 is electrically connected to the control unit, and the control unit is configured to control the feeding speed of the feeding mechanism 24 according to the detection result of the material quantity sensor 30.

[0057] Wherein, the material quantity sensor 30 detects the height of the electrode powder accumulated between the first pressing roller 11 and the second pressing roller 12, so as to judge the amount of electrode powder accumulated between the first pressing roller 11 and the second pressing roller 12. When it is detected that the amount of electrode powder is too small, the control unit controls the feeding speed to increase; when it is detected that the amount of electrode powder is too large, the control unit controls the feeding speed to decrease.

[0058] In the above technical solution, by making the electrode film forming device 100 include a feeding mechanism 20, the feeding mechanism 20 can automatically feed materials into the rolling mechanism 10, eliminating the need for manual feeding into the rolling mechanism 10 in the related art, reducing the amount of manual operation and labor intensity. Moreover, compared with manual feeding, the automatic feeding of the feeding mechanism 20 can provide better feeding stability and improve the working stability of the electrode film forming device 100. Additionally, by making the feeding speed of the feeding mechanism 24 adjustable and electrically connecting the control unit to the feeding mechanism 24, the control unit can control the feeding speed of the feeding mechanism 24. This not only ensures stable feeding into the roll gap 13 of the rolling mechanism 10, but also allows adjustment of the feeding speed according to requirements, improving the integrity of the electrode film formed by rolling the electrode powder, reducing the occurrence of powder bridging caused by excessive powder accumulation in the roll gap 13, which may block the roll gap 13 and affect the process, and is beneficial to improving the forming quality of the electrode film.

[0059] In some embodiments, referring to Figure 1 , the material quantity sensor 30 is located directly above the roll gap 13, and the material quantity sensor 30 is used to detect the accumulation height of the electrode powder accumulated between the first pressing roller 11 and the second pressing roller 12.

[0060] Among them, the material quantity sensor 30 is used to detect the stacking height of the electrode powder stacked between the first pressing roller 11 and the second pressing roller 12. The material quantity sensor 30 is electrically connected to the control unit. The material quantity sensor 30 transmits the detected stacking height data of the electrode powder to the control unit, and the control unit controls the feeding speed of the feeding mechanism 24 according to the detection result of the material quantity sensor 30, automatically controlling the feeding speed. The material quantity sensor 30 detects the height of the electrode powder stacked between the first pressing roller 11 and the second pressing roller 12, thereby judging the amount of the electrode powder stacked between the first pressing roller 11 and the second pressing roller 12. When the material quantity detector detects that the amount of the electrode powder is too small, the control unit controls the feeding speed to increase. When it detects that the amount of the electrode powder is too large, the control unit controls the feeding speed to decrease.

[0061] Among them, the explanation of the stacking height of the electrode powder stacked between the first pressing roller 11 and the second pressing roller 12 is as follows: Taking the plane where the center of the first pressing roller 11 and the center of the second pressing roller 12 are located as the reference plane 40. For example, the reference plane 40 can be parallel to the horizontal plane. The electrode powder stacked between the first pressing roller 11 and the second pressing roller 12 is an electrode powder stack, and the height distance between the upper surface of the electrode powder stack and the reference plane 40.

[0062] For example, the material quantity sensor 30 can be a distance sensor. The material quantity sensor 30 emits laser and detects the distance between the material quantity sensor 30 and the highest point of the electrode powder stacked between the first pressing roller 11 and the second pressing roller 12. The material quantity sensor 30 can directly measure the distance between the material quantity sensor 30 and the upper surface of the electrode powder stack as h1, and the distance between the material quantity sensor 30 and the reference plane 40 is h2. After the electrode film forming device 100 is assembled, the distance h2 between the material quantity sensor 30 and the reference plane 40 is fixed and unchanged. The value of the distance h2 between the material quantity sensor 30 and the reference plane 40 can be stored in advance in the control unit or the material quantity sensor 30. By calculating the difference between h2 and h1, the stacking height of the electrode powder stacked between the first pressing roller 11 and the second pressing roller 12 can be obtained.

[0063] In the above technical solution, by making the material quantity sensor 30 be used to detect the stacking height of the electrode powder stacked between the first pressing roller 11 and the second pressing roller 12, the material quantity sensor 30 can monitor the stacking height of the electrode powder at all times and transmit the detected data to the control unit, without the method of manual visual observation in the related technology to detect the stacking height of the electrode powder. The detected stacking height data of the electrode powder is more accurate, and controlling the feeding speed according to the stacking height data of the electrode powder is more in line with the production situation.

[0064] In some embodiments, referring to Figure 1, the control unit is used to control the feeding speed of the feeding mechanism 24 according to the detection result of the material quantity sensor 30, so as to control the stacking height of the electrode powder accumulated between the first pressing roller 11 and the second pressing roller 12 within 20 mm to 30 mm.

[0065] For example, taking the feeding mechanism 24 including a feeding roller 25 and a feeding drive mechanism as an example, when the material quantity sensor 30 detects that the stacking height of the electrode powder between the first pressing roller 11 and the second pressing roller 12 is greater than 30 mm, the rotation speed of the feeding roller 25 is reduced to 80% of the original rotation speed; when the powder sensor detects that the stacking height of the electrode powder between the first pressing roller 11 and the second pressing roller 12 is lower than 20 mm, the rotation speed of the feeding roller 25 is increased to 120% of the original rotation speed.

[0066] By controlling the control unit to control the feeding speed of the feeding mechanism 24 according to the detection result of the material quantity sensor 30, the stacking height of the electrode powder accumulated between the first pressing roller 11 and the second pressing roller 12 can be controlled within 20 mm to 30 mm. For example, the stacking height of the electrode powder accumulated between the first pressing roller 11 and the second pressing roller 12 can be controlled at 20 mm, 22 mm, 24 mm, 26 mm, 28 mm, 30 mm, etc.

[0067] In the above technical solution, by making the stacking height of the electrode powder accumulated between the first pressing roller 11 and the second pressing roller 12 not less than 20 mm, it is possible to avoid too little powder accumulated in the roll gap 13 and avoid the formation of holes in the prepared dry electrode film, etc., which affect its integrity; by making the stacking height of the electrode powder accumulated between the first pressing roller 11 and the second pressing roller 12 not exceed 30 mm, it is possible to avoid too much powder accumulated in the roll gap 13 and avoid the powder tower bridge, which may cause the roll gap 13 to be blocked and affect the preparation of the dry electrode film. By making the control unit control the feeding speed of the feeding mechanism 24 according to the detection result of the material quantity sensor 30, the amount of powder accumulated in the roll gap 13 can be made appropriate, and the prepared electrode film can be made complete.

[0068] In some embodiments, referring to Figure 1 , the plane where the center of the first pressing roller 11 and the center of the second pressing roller 12 are located is the reference plane 40, and the height distance between the material quantity sensor 30 and the reference plane 40 is 40 mm to 60 mm.

[0069] For example, the height distance between the material quantity sensor 30 and the reference plane 40 can be 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, etc.

[0070] In the above technical solution, by making the height spacing between the material quantity sensor 30 and the reference surface 40 not greater than 60 mm, interference between the material quantity sensor 30 and the first pressure roller 11 or the second pressure roller 12 can be avoided, preventing the first pressure roller 11 or the second pressure roller 12 from rotating and operating normally. By making the height spacing between the material quantity sensor 30 and the reference surface 40 not less than 40 mm, the detection of the electrode powder material quantity by the material quantity sensor 30 can be made more accurate, and the overall structure can be made appropriately compact and space-saving.

[0071] In some embodiments, referring to Figure 1 , the discharge port 23 is located at the bottom of the material bin 21, and the feed port 22 is located at the top of the material bin 21; and / or, the material bin 21 is in the shape of a conical cylinder.

[0072] For example, the discharge port 23 is located at the bottom of the material bin 21, and the feed port 22 is located at the top of the material bin 21; for another example, the material bin 21 is in the shape of a conical cylinder; for yet another example, the discharge port 23 is located at the bottom of the material bin 21, the feed port 22 is located at the top of the material bin 21, and the material bin 21 is in the shape of a conical cylinder.

[0073] In the above technical solution, by making the discharge port 23 located at the bottom of the material bin 21 and the feed port 22 located at the top of the material bin 21, relevant personnel can feed materials from the top of the material bin 21. The electrode powder moves downward in the material bin 21 under its own gravity and finally leaves the material bin 21 from the discharge port 23, making the feeding operation of relevant personnel more convenient. By making the material bin 21 in the shape of a conical cylinder, the feed port 22 can be made large enough during feeding, making the feeding operation more convenient; and the speed at which the motor powder leaves the material bin 21 can be appropriately slowed down, making the feeding speed of the electrode powder more controllable.

[0074] In some embodiments, referring to Figure 1 , the feeding mechanism 20 further includes a vibration dispersion mechanism 28. The vibration dispersion mechanism 28 is located above the feeding mechanism 24 and between the feed port 22 and the feeding mechanism 24, and the vibration dispersion mechanism 28 is used for vibrating and dispersing the electrode powder.

[0075] In the above technical solution, by making the feeding mechanism 20 further include a vibration dispersion mechanism 28, when the electrode film forming device 100 is working, the vibration dispersion mechanism 28 can be vibrated to disperse the electrode powder on the vibration dispersion mechanism 28, reducing the phenomenon of powder bridging and more fully avoiding the difficulty of feeding caused by powder blockage or the difficulty of preparing dry electrode membrane sheets.

[0076] In some embodiments, referring to Figure 1 , the vibration dispersion mechanism 28 includes a vibrating screen 29, and the vibrating screen 29 can vibrate in the vertical direction and / or the vibrating screen 29 can vibrate in the horizontal direction.

[0077] For example, the vibrating screen 29 can vibrate in the vertical direction; for another example, the vibrating screen 29 can vibrate in the horizontal direction; for still another example, the vibrating screen 29 can vibrate in both the vertical and horizontal directions.

[0078] In the above technical solution, by enabling the vibrating screen 29 to vibrate in the vertical direction, the electrode powder located on the vibration dispersion mechanism 28 can be more fully dispersed, the phenomenon of powder bridging can be reduced, and it is more fully avoided that the powder blockage causes difficulties in material feeding or difficulties in preparing dry electrode diaphragms; by enabling the vibrating screen 29 to vibrate in the left-right direction, the electrode powder located on the vibration dispersion mechanism 28 can be more fully dispersed, the phenomenon of powder bridging can be reduced, and it is more fully avoided that the powder blockage causes difficulties in material feeding or difficulties in preparing dry electrode diaphragms.

[0079] In a second aspect, the present utility model provides a dry electrode production device, including: an electrode film forming device 100 according to the first aspect of the present utility model.

[0080] In the above technical solution, by including the electrode film forming device 100 according to the first aspect of the present utility model, the amount of operation of personnel can be reduced, and the stability of electrode film forming can be improved.

[0081] Next, refer to Figure 1 Describe the electrode film forming device 100 and the dry electrode production device according to some embodiments of the present utility model.

[0082] Refer to Figure 1 , in this embodiment, the electrode film forming device 100 includes: a roll pressing mechanism 10, a material feeding mechanism 20, a control unit, and a material amount sensor 30.

[0083] The roll pressing mechanism 10 includes a first pressing roller 11 and a second pressing roller 12. A roll gap 13 is defined between the first pressing roller 11 and the second pressing roller 12. The roll pressing mechanism 10 is used to roll the electrode powder to form an electrode film;

[0084] The blanking mechanism 20 is located above the rolling mechanism 10 and includes a silo 21, a feeding mechanism 24, and a vibration dispersion mechanism 28. The silo 21 is in the shape of a conical cylinder and has a feeding port 22 and a discharging port 23. The discharging port 23 is located at the bottom of the silo 21, and the feeding port 22 is located at the top of the silo 21. The feeding mechanism 24 is used to convey the electrode powder in the silo 21 through the discharging port 23 into the roll gap 13, and the feeding speed of the feeding mechanism 24 is adjustable. The feeding mechanism 24 includes a feeding roller 25 and a feeding driving mechanism. The feeding roller 25 is rotatably arranged at the discharging port 23, and the feeding driving mechanism is connected to the feeding roller 25 to drive the feeding roller 25 to rotate. The control unit is electrically connected to the feeding driving mechanism to control the feeding speed mechanism so that the rotation speed of the feeding roller 25 is adjustable. The feeding roller 25 includes a roller shaft 26 and a plurality of feeding teeth 27. The plurality of feeding teeth 27 are arranged on the outer peripheral wall of the roller shaft 26 and are spaced at intervals along the circumferential direction of the roller shaft 26. Some of the feeding teeth 27 are adapted to contact the inner wall of the silo 21. Part of the feeding roller 25 is located inside the silo 21, and part of the feeding roller 25 is located outside the silo 21 and between the silo 21 and the first pressing roller 11. The vibration dispersion mechanism 28 is located above the feeding mechanism 24 and between the feeding port 22 and the feeding mechanism 24, and the vibration dispersion mechanism 28 is used to vibrate and disperse the electrode powder. The vibration dispersion mechanism 28 includes a vibrating screen 29, and the vibrating screen 29 can vibrate in the vertical direction and the horizontal direction.

[0085] The material quantity sensor 30 is used to detect the quantity of the electrode powder accumulated between the first pressing roller 11 and the second pressing roller 12. The material quantity sensor 30 is located directly above the roll gap 13, and the material quantity sensor 30 is used to detect the accumulation height of the electrode powder accumulated between the first pressing roller 11 and the second pressing roller 12.

[0086] The control unit is electrically connected to the feeding mechanism 24 and the material quantity sensor 30, and controls the feeding speed of the feeding mechanism 24 according to the detection result of the material quantity sensor 30. The control unit is used to control the feeding speed of the feeding mechanism 24 according to the detection result of the material quantity sensor 30 so as to control the accumulation height of the electrode powder accumulated between the first pressing roller 11 and the second pressing roller 12 within 20 mm to 30 mm. The plane where the center of the first pressing roller 11 and the center of the second pressing roller 12 are located is the reference plane 40, and the height distance between the material quantity sensor 30 and the reference plane 40 is 40 mm to 60 mm.

[0087] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0088] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An electrode film forming device, characterized in that: include: A rolling mechanism, the rolling mechanism comprising a first pressing roller and a second pressing roller, a roller gap being defined between the first pressing roller and the second pressing roller, and the rolling mechanism being used for rolling the electrode powder to form an electrode film; A feeding mechanism, the feeding mechanism is located above the rolling mechanism and includes a silo and a feeding mechanism, the silo has an inlet and an outlet, the feeding mechanism is used to transport the electrode powder in the silo to the roller gap through the outlet, the feeding mechanism includes a feeding roller and a feeding drive mechanism, the feeding roller includes a roller shaft and a plurality of feeding teeth, the plurality of feeding teeth are arranged on the outer peripheral wall of the roller shaft and are arranged at intervals along the circumference of the roller shaft, the feeding roller is rotatably arranged at the outlet, and the feeding drive mechanism is connected to the feeding roller to drive the feeding roller to rotate; A control unit is electrically connected to the feeding mechanism to control the feeding speed of the feeding mechanism so that the rotation speed of the feeding roller is adjustable.

2. The electrode film forming device according to claim 1, characterized in that: Part of the feed teeth is adapted to contact the inner wall of the silo.

3. The electrode film forming device according to claim 1, characterized in that: Part of the feed roller is located inside the material bin, and part of the feed roller is located outside the material bin and between the material bin and the first pressing roller.

4. The electrode film forming device according to claim 1, characterized in that: Also includes: A material quantity sensor, wherein the material quantity sensor is used to detect the amount of electrode powder accumulated between the first pressing roller and the second pressing roller. The material quantity sensor is electrically connected to the control unit, and the control unit is used to control the feeding speed of the feeding mechanism according to the detection result of the material quantity sensor.

5. The electrode film forming device according to claim 4, characterized in that: The material quantity sensor is located directly above the roller gap, and is used to detect the stacking height of the electrode powder accumulated between the first pressing roller and the second pressing roller.

6. The electrode film forming device according to claim 5, characterized in that: The control unit is used to control the feeding speed of the feeding mechanism according to the detection result of the material quantity sensor, so as to control the stacking height of the electrode powder accumulated between the first pressing roller and the second pressing roller to be 20 mm to 30 mm.

7. The electrode film forming device according to claim 5, characterized in that: The plane where the center of the first pressing roller and the center of the second pressing roller are located is a reference plane, and the height distance between the material amount sensor and the reference plane is 40 mm to 60 mm.

8. The electrode film forming device according to claim 1, characterized in that: The discharge port is located at the bottom of the silo, and the inlet port is located at the top of the silo; and / or the silo is in a conical cylindrical shape.

9. The electrode film forming device according to any one of claims 1 to 8, characterized in that: The unloading mechanism further includes a vibration dispersion mechanism, which is located above the feeding mechanism and between the feeding port and the feeding mechanism, and is used for vibrating and dispersing electrode powder.

10. The electrode film forming device according to claim 9, characterized in that: The vibration dispersion mechanism includes a vibrating screen, and the vibrating screen can vibrate in an up-and-down direction and / or the vibrating screen can vibrate in a horizontal direction.

11. A dry electrode production device, characterized in that: include: An electrode film forming device according to any one of claims 1-10.

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