Pole piece production equipment and pole piece production method

Abstract

The invention provides pole piece production equipment and a pole piece production method, the pole piece production equipment comprises a film forming device and a feeding device, the film forming device at least comprises two rollers, and a roller gap between the two rollers forms an extrusion part; the feeding device comprises a buffer storage bin, a first vibration feeding structure and a second vibration feeding structure; the first vibration feeding structure comprises a first material groove and a first vibration part, the first material groove is provided with a first inlet and a first outlet which are communicated with the buffer storage bin, a screen is arranged at the first outlet, the first vibration part is connected with the first material groove, and the first vibration part can make powder enter the second material groove; and the second vibration feeding structure comprises a second material groove and a second vibration piece, the second vibration piece can enable the powder to fall into the extrusion part from the second outlet, it is guaranteed that the particle size of the powder entering the extrusion part is uniform, and the thickness uniformity and the film forming quality of the film are improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and particularly relates to a pole piece production device and a pole piece production method. Background Art

[0002] During the production process of pole pieces, the feeding device is prone to problems such as powder caking and accumulation during the feeding process. Therefore, it is impossible to ensure that the powder is uniformly and stably transported to the extrusion part of the film forming device, resulting in different amounts of powder received by each part during the extrusion and film forming process of the pole piece. For example, when there is too much powder in a certain area, the thickness of the pole piece in this area increases significantly after extrusion; conversely, in the area with too little powder, the thickness of the pole piece is relatively thin. Moreover, due to the uneven particle size of the powder, large caked or agglomerated substances cannot be fully fused during extrusion, and stress concentration points will be generated inside the pole piece. During subsequent processing or use, these stress concentration points are likely to cause defects such as holes and cracks, greatly reducing the thickness uniformity and overall quality of the film. Summary of the Invention

[0003] The present application discloses a pole piece production device and a pole piece production method, which can improve the thickness uniformity and quality of the film.

[0004] To achieve the above object, the present application discloses a film forming device, including:

[0005] A film forming device, the film forming device includes at least two rolling mills, the two rolling mills are arranged along a first horizontal direction, and the roll gap between adjacent rolling mills forms an extrusion part, and the first horizontal direction is perpendicular to the extending direction of the rolling mills;

[0006] A feeding device, the feeding device includes:

[0007] A buffer storage bin;

[0008] A first vibrating feeding structure, the first vibrating feeding structure includes a first trough and a first vibrating member, the first trough extends along the first horizontal direction, and the first trough has a first inlet and a first outlet, the first inlet is communicated with the buffer storage bin, a screen is arranged at the first outlet, and the first vibrating member is connected with the first trough;

[0009] A second vibrating feeding structure, the second vibrating feeding structure 230 includes a second trough and a second vibrating member, the second trough extends along the first horizontal direction, and the second trough has a second inlet and a second outlet, the second inlet is communicated with the first outlet, the second outlet faces the extrusion part and is open, and the second vibrating member is connected with the second trough.

[0010] Optionally, the first vibrating member is disposed at an end of the first material tank near the first inlet, and the second vibrating member is disposed at an end of the second material tank near the second inlet.

[0011] Optionally, the pole piece production equipment further includes a control module and a first detection member electrically connected to the control module, and the first detection member is configured to detect the height of the powder stack at the extrusion portion;

[0012] The control module is electrically connected to the first vibrating member, and the control module is configured to control the vibration frequency of the first vibrating member according to the height of the powder stack detected by the first detection member at the extrusion portion;

[0013] and / or,

[0014] The control module is electrically connected to the second vibrating member, and the control module is configured to control the vibration frequency of the second vibrating member according to the height of the powder stack detected by the first detection member at the extrusion portion.

[0015] Optionally, the screen is detachably disposed at the first outlet.

[0016] Optionally, a collection port is provided at a position of the first material tank away from the first inlet. Along the first horizontal direction, the first outlet is located between the collection port and the first inlet, and a collection member is provided at the collection port.

[0017] Optionally, a negative pressure member is further included, and the collection port is communicated with the negative pressure member.

[0018] Optionally, both the first vibrating member and the second vibrating member are electromagnetic vibrators.

[0019] Optionally, a third vibrating member is provided at the discharge port of the buffer bin.

[0020] Optionally, the pole piece production equipment further includes a feeding device, and the feeding device is electrically connected to the control module;

[0021] A second detection member electrically connected to the control module is provided in the buffer bin, and the second detection member is configured to detect the height of the powder in the buffer bin.

[0022] Optionally, the feeding device includes:

[0023] a feeding bin;

[0024] a feeding structure, the feeding structure includes a feeding trough and a spiral feeding member disposed in the feeding trough, the feeding trough extends along the first horizontal direction, the feeding trough has a third inlet and a third outlet, the third inlet is communicated with the feeding bin, and the third outlet faces the buffer bin.

[0025] Optionally, a control valve electrically connected to the control module is provided at the third outlet. The control module is configured to control the opening or closing of the control valve according to the height of the powder in the buffer bin detected by the second detector, so as to keep the third outlet in an open state or a closed state.

[0026] Optionally, the pole piece production equipment includes a bracket and a pressure sensor arranged on the bracket. The feeding device is arranged on the bracket. The pressure sensor is arranged between the feeding device and the bracket and is electrically connected to the control module.

[0027] The feeding device further includes an alarm electrically connected to the control module. The control module is configured to control the alarm to give an alarm according to the weight of the feeding device detected by the pressure sensor.

[0028] Optionally, a plurality of the feeding devices are arranged along a second horizontal direction parallel to the extending direction of the roller.

[0029] The feeding device is movably arranged on the bracket along the second horizontal direction.

[0030] The pole piece production equipment further includes a driving member connected to the feeding device. The driving member is electrically connected to the control module. The control module is configured to control the feeding device to move along the second horizontal direction to any buffer bin where powder needs to be added according to the height of the powder in the buffer bin detected by the second detector.

[0031] Optionally, a guiding slide rail and a guiding slider matching with the guiding slide rail are arranged on the bracket. The guiding slide rail extends along the second horizontal direction. The feeding bin is arranged on the guiding slider, and the pressure sensor is arranged between the feeding bin and the guiding slider.

[0032] The present application further provides a pole piece production method applied to the above pole piece production equipment. The pole piece production method includes:

[0033] S1, feeding the feeding device towards the extrusion part;

[0034] S2, measuring the height of the powder accumulated at the extrusion part;

[0035] S3, if the height of the powder accumulated at the extrusion part reaches a first preset lower limit height, starting the rotation of the roller to extrude the powder accumulated at the extrusion part into a film.

[0036] Optionally, the pole piece production equipment further includes a first detector, which is electrically connected to the control module. The first detector is used to detect the height of the powder accumulated at the extrusion part. The feeding device further includes a second trough and a second vibrating member connected to the second trough. The second trough extends along the first horizontal direction. The first vibrating member and the second vibrating member are electrically connected to the control module. After S3, the pole piece production method further includes:

[0037] S3a1, select the interval of the height of the powder accumulated at the extrusion part, and determine the first upper limit height and the first lower limit height;

[0038] S3a2, select a preset height value of the powder accumulated at the extrusion part, where the preset height value is higher than the first lower limit height and lower than the first upper limit height;

[0039] S3a3, measure the feeding speed of the extrusion part;

[0040] S3a4, determine the vibration frequency of the second vibrating member according to the preset height value and the feeding speed of the extrusion part. This vibration frequency is the first vibration frequency;

[0041] S3a5, determine the vibration frequency of the first vibrating member according to the vibration frequency of the second vibrating member. This vibration frequency is the second vibration frequency;

[0042] S3a6, make the second vibrating member vibrate at the first vibration frequency and the second vibrating member vibrate at the second vibration frequency, so that the feeding device feeds material towards the extrusion part;

[0043] S3a7, set the first preset upper limit height and the first preset lower limit height in the control module;

[0044] S3a8, the first detector transmits the detected actual powder height information at the extrusion part to the control module;

[0045] S3a9, the control module compares the actual powder height accumulated in the extrusion part with the first preset upper limit height and the first preset lower limit height;

[0046] S3a10, if the actual powder height accumulated in the extrusion part is greater than the first preset upper limit height, the control module respectively controls the vibration frequencies of the first vibrating member and the second vibrating member to gradually decrease until the actual powder height accumulated in the extrusion part is lower than the first preset upper limit height and higher than the first preset lower limit height,

[0047] If the actual height of the powder accumulated in the extrusion part is less than the first preset lower limit height, the control module controls the vibration frequencies of the first vibration member and the second vibration member to gradually increase until the actual height of the powder accumulated in the extrusion part is lower than the first preset upper limit height and higher than the first preset lower limit height.

[0048] Optionally, the pole piece production equipment further includes a feeding device. A second detection member electrically connected to the control module is provided in the buffer bin. The second detection member is used to detect the height of the powder in the buffer bin. After S3, the pole piece production method includes:

[0049] S3b1, setting a second preset upper limit height and a second preset lower limit height in the control module;

[0050] S3b2, the second detection member transmits the detected powder height information in the buffer bin to the control module;

[0051] S3b3, the control module compares the powder height in the buffer bin with the second preset upper limit height and the second preset lower limit height;

[0052] S3b4, if the powder height in the buffer bin is less than the second preset lower limit height, the control module controls the feeding device to put the powder into the buffer bin,

[0053] if the powder height in the buffer bin reaches the second preset upper limit height, the control module controls the feeding device to stop putting the powder into the buffer bin.

[0054] Optionally, the pole piece production equipment further includes a feeding device and a pressure sensor electrically connected to the control module. The feeding device includes an alarm electrically connected to the control module. The control module is used to control the alarm to give an alarm according to the weight of the feeding device detected by the pressure sensor. After S3, the pole piece production method further includes:

[0055] S3c1, setting a preset upper limit weight and a preset lower limit weight in the control module;

[0056] S3c2, the pressure sensor transmits the detected weight information of the feeding device to the control module;

[0057] S3c3, the control module compares the weight of the feeding device with the preset weight upper limit and the preset lower limit weight;

[0058] S3c4, if the weight of the feeding device is less than the preset lower limit weight, the control module controls the alarm to give an alarm.

[0059] If the weight of the feeding device reaches the preset upper limit weight, the control module controls the alarm to give an alarm.

[0060] Compared with the prior art, the beneficial effects of the present application are as follows:

[0061] In this embodiment, by adopting a two-stage vibrating feeding structure (the first vibrating feeding structure and the second vibrating feeding structure), the conveying speed and flow rate of the powder can be controlled more precisely. Each stage of the vibrating feeding structure can adjust the vibration frequency and amplitude according to actual needs, so that the powder can be evenly and stably conveyed to the extrusion part. Moreover, in the first vibrating feeding structure and the second vibrating feeding structure, the vibration at the bottom of the first trough and the second trough can evenly push the powder forward, avoiding the situation of powder accumulation or blockage in the trough, enabling the powder to reach the extrusion part from the buffer bin through two stages of troughs at a stable speed and flow rate, thereby avoiding problems such as inconsistent pole piece thickness caused by uneven feeding. And a screen is arranged at the first outlet, which can effectively remove large particles and agglomerates in the powder, ensure that the particle size of the powder entering the extrusion part is uniform, and reduce defects such as holes and cracks caused by uneven powder particle size, which helps to improve the thickness uniformity and film-forming quality of the diaphragm. Description of the Drawings

[0062] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0063] Figure 1 is a schematic diagram of a pole piece production device provided by an embodiment of the present application;

[0064] Figure 2 is a top view of the pole piece production device provided by an embodiment of the present application;

[0065] Figure 3 is a side view of the pole piece production device provided by an embodiment of the present application;

[0066] Figure 4 is a schematic diagram of a feeding device provided by an embodiment of the present application;

[0067] Figure 5 is a schematic diagram of a feeding device provided by an embodiment of the present application;

[0068] Figure 6 is a flowchart of a pole piece production method provided by an embodiment of the present application;

[0069] Figure 7It is a flowchart of a method for producing a pole piece provided by another embodiment of the present application;

[0070] Figure 8 It is a flowchart of a method for producing a pole piece provided by another embodiment of the present application;

[0071] Figure 9 It is a flowchart of a method for producing a pole piece provided by another embodiment of the present application.

[0072] Description of main reference numerals

[0073] 1 - Pole piece production equipment;

[0074] 100 - Film forming device; 110 - Roller;

[0075] 200 - Feeding device;

[0076] 210 - Buffer bin; 210a - Second detection part;

[0077] 220 - First vibrating feeding structure; 2201 - First trough; 2201a - First inlet; 2201b - First outlet; 2201c - Collection port; 2202 - First vibrating part; 2203 - Sieve; 2204 - Collection part;

[0078] 230 - Second vibrating feeding structure; 2301 - Second trough; 2301a - Second inlet; 2301b - Second outlet; 2302 - Second vibrating part;

[0079] 240 - Third vibrating part;

[0080] 300 - First detection part;

[0081] 400 - Loading device;

[0082] 410 - Loading bin;

[0083] 420 - Feeding structure; 4201 - Feeding trough; 4201a - Third inlet; 4201b - Third outlet; 4202 - Screw feeding part; 4203 - Control valve; 430 - Fourth vibrating part;

[0084] 500 - Bracket; 510 - Guide rail; 520 - Guide slider;

[0085] 600 - Pressure sensor. Detailed implementation manners

[0086] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0087] In the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0088] Moreover, in addition to being used to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

[0089] In addition, the terms "install", "set", "provided with", "connect", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0090] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components. The specific types and structures may be the same or different, and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0091] As mentioned in the background art, during the feeding process of the feeding device, problems such as powder caking and accumulation are likely to occur. Therefore, it is impossible to ensure that the powder is uniformly and stably conveyed to the extrusion part of the film forming device, resulting in different amounts of powder received by different parts of the electrode sheet during the extrusion and film forming process. For example, when there is too much powder in a certain area, the thickness of the electrode sheet in this area increases significantly after extrusion; conversely, in the area with too little powder, the thickness of the electrode sheet is relatively thin. Moreover, due to the uneven particle size of the powder, large caked or agglomerated substances cannot be fully fused during extrusion, and stress concentration points will be generated inside the electrode sheet. During subsequent processing or use, these stress concentration points are likely to cause defects such as holes and cracks, greatly reducing the thickness uniformity and overall quality of the film sheet.

[0092] To solve the above problems, the present application provides a production equipment for electrode sheets, which adopts a two-stage vibration feeding structure (the first vibration feeding structure and the second vibration feeding structure). The vibration at the bottom of the first material tank and the second material tank can uniformly push the powder forward, avoiding the situation of powder accumulation or blockage in the material tank, enabling the powder to reach the extrusion part from the buffer bin through the two-stage material tank at a stable speed and flow rate, thus avoiding problems such as inconsistent thickness of the electrode sheet caused by uneven feeding. Moreover, a screen is provided at the first outlet, which can effectively remove large particles and agglomerates in the powder, ensure the uniform particle size of the powder entering the extrusion part, and reduce defects such as holes and cracks caused by uneven powder particle size, which helps to improve the thickness uniformity and film forming quality of the film sheet.

[0093] The technical solution of the production equipment for electrode sheets of the present application will be further described below in conjunction with specific embodiments and drawings.

[0094] See Figures 1 to 4, this embodiment provides a pole piece production device 1, including: a film forming device 100 and a feeding device 200. The film forming device 100 includes at least two rollers 110, and the two rollers 110 are arranged along a first horizontal direction. A roll gap between the two rollers 110 forms an extrusion part, and the first horizontal direction is perpendicular to the extending direction of the rollers 110. The feeding device 200 includes: a buffer bin 210, a first vibrating feeding structure 220, and a second vibrating feeding structure 230. The buffer bin 210 is used for storing powder materials. The first vibrating feeding structure 220 includes a first trough 2201 and a first vibrating member 2202. The first trough 2201 extends along the first horizontal direction, and the first trough 2201 has a first inlet 2201a and a first outlet 2201b. The first inlet 2201a is communicated with the buffer bin 210, and a screen 2203 is arranged at the first outlet 2201b. The first vibrating member 2202 is connected to the first trough 2201, and the first vibrating member 2202 can drive the bottom of the first trough 2201 to vibrate, so that the powder materials in the first trough 2201 move from the first inlet 2201a to the first outlet 2201b under the action of the vibration force. The second vibrating feeding structure 230 includes a second trough 2301 and a second vibrating member 2302. The second trough 2301 extends along the first horizontal direction, and the second trough 2301 has a second inlet 2301a and a second outlet 2301b. The second inlet 2301a is communicated with the first outlet 2201b, and the second outlet 2301b is open towards the extrusion part. The second vibrating member 2302 is connected to the second trough 2301, and the second vibrating member 2302 can drive the bottom of the second trough 2301 to vibrate, so that the powder materials in the first trough 2201 move from the second inlet 2301a to the second outlet 2301b under the action of the vibration force, and fall into the extrusion part through the second outlet 2301b, so that the two rollers 110 can extrude the powder materials into a film.

[0095] Wherein, the first horizontal direction is Figure 2 the direction indicated by the arrow X in

[0096] During the process of manufacturing the diaphragm, the buffer silo 210 serves as a storage container for the powder material, storing the powder material to be processed therein. The first inlet 2201a of the first trough 2201 receives the powder material from the buffer silo 210, and the first vibrating member 2202 starts to work. Since the first trough 2201 in the first vibrating feeding structure 220 is connected to the buffer silo 210, it can drive the bottom of the first trough 2201 to vibrate. Under the action of the vibration force, the powder material in the first trough 2201 overcomes the resistance such as friction and moves from the first inlet 2201a to the first outlet 2201b. When the powder material reaches the first outlet 2201b, the sieve mesh 2203 can screen the powder material to remove the possible large particles or agglomerates therein. The powder material screened by the sieve mesh 2203 enters the second inlet 2301a of the second trough 2301 of the second vibrating feeding structure 230 from the first outlet 2201b. The second vibrating member 2302 drives the bottom of the second trough 2301 to vibrate, so that the powder material moves from the second inlet 2301a to the second outlet 2301b under the action of the vibration force. Since the second outlet 2301b is open towards the extrusion part of the film forming device 100, after the powder material reaches the second outlet 2301b, it will fall into the extrusion part between the two rollers 110. The two rollers 110 apply pressure to the powder material falling into the extrusion part to extrude the powder material into a film.

[0097] By adopting a two-stage vibrating feeding structure (the first vibrating feeding structure 220 and the second vibrating feeding structure 230), the conveying speed and flow rate of the powder material can be controlled more precisely. Each stage of the vibrating feeding structure can adjust the vibration frequency and amplitude according to actual needs, so that the powder material can be conveyed to the extrusion part evenly and stably. Moreover, in the first vibrating feeding structure 220 and the second vibrating feeding structure 230, the vibration at the bottoms of the first trough 2201 and the second trough 2301 can push the powder material forward evenly, avoiding the situation of powder material accumulation or blockage in the trough, enabling the powder material to reach the extrusion part from the buffer silo 210 through two-stage troughs at a stable speed and flow rate, thus avoiding problems such as inconsistent pole piece thickness caused by uneven feeding. And by setting the sieve mesh 2203 at the first outlet 2201b, the large particles and agglomerates in the powder material can be effectively removed, ensuring the uniform particle size of the powder material entering the extrusion part and reducing the defects such as holes and cracks caused by uneven powder material particle size, which helps to improve the thickness uniformity and film forming quality of the diaphragm.

[0098] In a possible embodiment, referring to Figure 3 , the first vibrating member 2202 is arranged at the end of the first trough 2201 close to the first inlet 2201a, and the second vibrating member 2302 is arranged at the end of the second trough 2301 close to the second inlet 2301a.

[0099] In the first chute 2201, when the powder material enters the first inlet 2201a from the buffer bin 210, in the initial state, the powder material is in a relatively static or piled-up state. The first vibrating member 2202 is arranged at the end close to the first inlet 2201a, which can apply a vibrating force to the powder material when it just enters the first chute 2201, so as to quickly break the cohesive force between the powder materials and the frictional force between the powder materials and the chute wall, enabling the powder material to smoothly start moving in the chute and laying a good foundation for the subsequent conveying process. Similarly, in the second chute 2301, the second vibrating member 2302 provides a vibrating force in a timely manner when the powder material enters the second inlet 2301a from the first outlet 2201b, ensuring that the powder material can smoothly enter the second chute 2301 and continue to be conveyed. In this way, by applying a vibrating force at the inlet ends of the first chute 2201 and the second chute 2301, the continuity of the powder material conveying can be effectively guaranteed, avoiding the interruption of the powder material during the conveying process or the instability of the feeding amount, which may affect the forming quality of the diaphragm.

[0100] In a possible embodiment, referring to Figure 1 , the pole piece production device 1 further includes a control module and a first detection member 300 electrically connected to the control module. The first detection member 300 is used to detect the height of the piled-up powder material at the extrusion part; the control module is electrically connected to the first vibrating member 2202, and the control module is used to control the vibration frequency of the first vibrating member 2202 according to the height of the piled-up powder material detected by the first detection member 300 at the extrusion part; and / or, the control module is electrically connected to the second vibrating member 2302, and the control module is used to control the vibration frequency of the second vibrating member 2302 according to the height of the piled-up powder material detected by the first detection member 300 at the extrusion part.

[0101] During the diaphragm production process, the first detector 300 continuously detects the height of the powder accumulated at the extrusion part in real time, and converts the detected height data into an electrical signal and transmits it to the control module. Among them, the first detector 300 can be a laser distance sensor, an ultrasonic sensor, etc. After receiving the height data transmitted by the first detector 300, the control module will compare and analyze it with the preset standard value of the powder height. If the detected powder height is higher than the standard value, it means that too much powder is transported to the extrusion part; if the detected powder height is lower than the standard value, it means that the transported powder is insufficient. When the control module determines that the powder height at the extrusion part does not meet the standard, it will send a control signal to the first vibrating part 2202 to adjust its vibration frequency. If the powder height is too high, the control module will reduce the vibration frequency of the first vibrating part 2202, thereby reducing the amount of powder transported from the first material tank 2201 to the second material tank 2301; if the powder height is too low, the control module will increase the vibration frequency of the first vibrating part 2202 to increase the powder transportation volume. Similarly, the control module can also control the second vibrating part 2302. According to the powder height situation at the extrusion part, the vibration frequency of the second vibrating part 2302 is adjusted, and then the amount of powder falling from the second material tank 2301 into the extrusion part is controlled. Of course, the control module can also coordinately adjust the vibration frequencies of the first vibrating part 2202 and the second vibrating part 2302 at the same time to more accurately control the powder transportation volume and quickly make the powder height at the extrusion part reach the standard value.

[0102] In this way, by continuously monitoring and adjusting the powder height at the extrusion part, it is possible to ensure that the amount of powder entering the extrusion of the roller 110 is stable and uniform, so that the pressure exerted by the roller 110 on the powder during the extrusion process is more uniform, thereby making the thickness of the produced diaphragm more consistent, improving the overall quality and performance of the pole piece. Moreover, the control module automatically adjusts the vibration frequency of the vibrating part according to the detection data without manual intervention, greatly shortening the adjustment time. During the production process, once the powder height at the extrusion part fluctuates, the system can quickly respond and make adjustments, reducing the production stagnation or product quality decline caused by untimely manual adjustment, and improving the continuity and efficiency of production.

[0103] In a possible embodiment, the screen 2203 is detachably arranged at the first outlet 2201b.

[0104] In the production of electrode sheets, different types of electrode sheets may require powders with different particle sizes. The detachable screen 2203 facilitates quickly replacing the screen 2203 with different pore sizes according to production requirements. For example, when producing electrode sheets with high requirements for powder particle size, a screen 2203 with a smaller pore size can be replaced to ensure that the powder entering the next process is finer and more uniform; while for the production of some electrode sheets with relatively low requirements for powder particle size, a screen 2203 with a larger pore size can be replaced to increase the passing rate of the powder and thus improve production efficiency.

[0105] During the screening process, the screen 2203 may be blocked by some large particles, agglomerates or sticky substances in the powder. The detachable screen 2203 can be easily removed from the first outlet 2201b for thorough cleaning to remove the substances blocking the screen holes and restore the screening ability of the screen 2203. Regularly cleaning and maintaining the screen 2203 can ensure the normal passage of the powder and avoid problems such as poor feeding or unstable feeding amount caused by the blockage of the screen 2203.

[0106] Among them, the screen 2203 is detachably arranged at the first outlet 2201b. It can be that a plurality of uniformly distributed mounting holes are provided at the edge of the screen 2203, and corresponding threaded holes are also provided at the corresponding positions at the first outlet 2201b. By passing bolts through the mounting holes of the screen 2203 and screwing them into the threaded holes at the first outlet 2201b, the fixed connection between the screen 2203 and the first outlet 2201b is realized; or a series of buckles are provided at the edge of the screen 2203, and clamping grooves matching the buckles are provided at the first outlet 2201b. During installation, align the buckles of the screen 2203 with the clamping grooves of the first outlet 2201b, and then press or rotate the screen 2203 forcefully to make the buckles snap into the clamping grooves to realize the quick fixation of the screen 2203. During disassembly, just operate in the reverse direction to disengage the buckles from the clamping grooves; it can also be that one or more slots are provided at the first outlet 2201b, and the edge of the screen 2203 is designed in the shape of a plug board matching the slots. During installation, align the plug board of the screen 2203 with the slots and then insert it into the slots to connect the screen 2203 with the first outlet 2201b. In order to prevent the screen 2203 from shaking or disengaging in the slots, some positioning and fixing devices such as positioning pins and elastic clamping blocks are provided on the slots or the plug board.

[0107] In a possible embodiment, refer to Figure 4 , a collection port 2201c is provided at the first trough 2201 away from the first inlet 2201a. Along the first horizontal direction, the first outlet 2201b is located between the collection port 2201c and the first inlet 2201a, and a collection member 2204 is connected to the collection port 2201c.

[0108] The first outlet 2201b is located between the collection port 2201c and the first inlet 2201a, such that the powder material entering from the first inlet 2201a can first pass through the first outlet 2201b for preliminary screening and discharge in the first trough 2201, and the powder material that does not pass through the first outlet 2201b can continue to move in the first trough 2201 towards the collection port 2201c and is finally collected by the collection member 2204 at the collection port 2201c.

[0109] Preferably, the collection port 2201c can be arranged at the bottom of the first trough 2201 away from the first inlet 2201a. Due to the gravitational force, the powder material that fails to be discharged from the first outlet 2201b naturally moves and accumulates towards the bottom collection port 2201c, facilitating centralized collection, improving the collection efficiency and integrity, reducing the residue of the powder material in the trough, and this structure enables the powder material in the first trough 2201 to have a clear flow direction, facilitating the cleaning and maintenance of the first trough 2201. When cleaning is required, the collection member 2204 at the collection port 2201c can be easily removed for cleaning, and at the same time, it is also convenient for operations such as inspection and repair of the interior of the first trough 2201. Of course, the collection port 2201c is not limited to being arranged at the bottom of the first trough 2201 away from the first inlet 2201a. For example, it can also be arranged on the side wall, and then the negative pressure member is used for suction collection.

[0110] In a possible embodiment, the pole piece production device 1 further includes a negative pressure member, and the collection port 2201c is communicated with the negative pressure member.

[0111] When the first vibrating feeding structure 220 operates, the first vibrating member 2202 drives the bottom of the first trough 2201 to vibrate. During this process, the powder material will fly and form dust. Since the collection port 2201c is communicated with the negative pressure member, the negative pressure member forms a negative pressure environment at the collection port 2201c, which can actively adsorb the dust generated by vibration and collect it from the first trough 2201 into the collection member 2204. Compared with relying on natural sedimentation or passive blocking methods, the negative pressure adsorption method can capture dust more efficiently and reduce the diffusion of dust in the first trough 2201 and the surrounding environment.

[0112] It should be noted that the above-mentioned negative pressure member can continuously function during the production process or function at regular intervals, which is not limited herein.

[0113] In a possible embodiment, both the first vibrating member 2202 and the second vibrating member 2302 are electromagnetic vibrators.

[0114] The electromagnetic vibrator can precisely adjust the vibration frequency and amplitude by changing the input current frequency and intensity. In the production of pole pieces, for powders with different characteristics and different production process requirements, it can accurately adjust the vibration parameters according to the actual situation to ensure that the powder reaches an ideal motion state in the first hopper 2201 and the second hopper 2301. For example, it can achieve uniform conveying and efficient screening of the powder, which helps to improve the quality and stability of pole piece production. Moreover, the working principle of the electromagnetic vibrator is based on electromagnetic induction, and its vibration system is relatively simple without complex mechanical transmission components. Therefore, it can maintain high stability during operation, continuously provide stable vibration, ensure the continuity and consistency of the powder processing process, and reduce problems such as powder accumulation and unsmooth conveying caused by unstable vibration, which is beneficial to improving production efficiency and the stability of product quality.

[0115] In addition, after receiving a control signal, the electromagnetic vibrator can quickly respond and rapidly adjust the vibration state. In the production of pole pieces, when it is necessary to adjust the vibration in a timely manner according to the state of the powder or changes in the production process, the electromagnetic vibrator can quickly adapt to achieve real-time control of the powder processing process and improve the flexibility and controllability of production.

[0116] Of course, the first vibrating member 2202 and the second vibrating member 2302 are not limited to electromagnetic vibrators. For example, the first vibrating member 2202 and the second vibrating member 2302 can also be motor vibrators, vibrating motors, pneumatic vibrators, etc.

[0117] In a possible embodiment, referring to Figure 4 , a third vibrating member 240 is provided at the discharge port of the buffer bin 210. The third vibrating member 240 is used to dredge the discharge port of the buffer bin 210 when the powder blocks the discharge port of the buffer bin 210.

[0118] During the production process, the powder may form a blockage at the discharge port of the buffer bin 210 due to reasons such as moisture absorption, caking, and uneven particle size. The third vibrating member 240 can break the caking and accumulation state of the powder through vibration, keep the powder loose, thus effectively preventing the discharge port from being blocked, ensuring that the powder can continuously and stably flow out of the buffer bin 210, guaranteeing the smooth progress of the entire production process, and avoiding production interruption and delay caused by the blockage of the discharge port.

[0119] Among them, the third vibrating member 240 can be an electromagnetic vibrating member, a motor vibrator, a vibrating motor, a pneumatic vibrator, etc. In a preferred embodiment, the third vibrating member 240 is a pneumatic vibrator, which uses compressed air as a power source and can generate a large vibration force. For the blockage of the discharge port of the buffer bin 210 caused by moisture absorption, caking, etc., it has sufficient force to disperse the caked powder and enable the powder to smoothly pass through the discharge port to ensure smooth discharge.

[0120] In a possible embodiment, refer to Figure 1 , Figure 4 and Figure 5 , the pole piece production equipment 1 further includes a feeding device 400, and the feeding device 400 is electrically connected to the control module; a second detector 210a electrically connected to the control module is arranged in the buffer bin 210. The second detector 210a is used to detect the height of the powder in the buffer bin 210, and the control module is used to control the feeding device 400 to put powder into the buffer bin 210 or stop putting powder into the buffer bin 210 according to the height of the powder in the buffer bin 210 detected by the second detector 210a.

[0121] The second detector 210a can continuously detect the height of the powder in the buffer bin 210 and transmit the detection data to the control module in real time. Among them, the second detector 210a can be an ultrasonic sensor, a radar level gauge, etc. After receiving the data, the control module will compare it with a preset powder height threshold. If the detected height is lower than the lower limit threshold, the control module determines that the powder in the buffer bin 210 is insufficient, and then sends an instruction to the feeding device 400 to start the feeding operation; if the detected height reaches or exceeds the upper limit threshold, the control module determines that the powder is sufficient, and immediately sends a stop feeding instruction to the feeding device 400. After receiving the feeding instruction from the control module, the feeding device 400 transports the powder to the buffer bin 210. Among them, the feeding device 400 can be a screw conveyor, a bucket elevator, etc. According to production requirements and actual working conditions, the powder is put in at a suitable speed and flow rate. After the powder reaches the set height, the feeding device 400 stops working according to the control module instruction.

[0122] In this way, through real-time monitoring and automatic control of feeding, it is ensured that the buffer bin 210 always has sufficient powder supply, avoiding production interruption caused by powder shortage, maintaining the continuity of the pole piece production process, improving production efficiency, and accurately controlling the feeding amount, preventing excessive powder accumulation in the buffer bin 210, reducing waste caused by powder backlog, reducing production costs, making the entire feeding process without frequent manual intervention, automatically controlled by the control module according to the detection data, improving the automation level of the pole piece production equipment 1, reducing labor costs, and at the same time reducing the risk of human operation errors.

[0123] In a possible embodiment, refer to Figure 4 , the second detector 210a includes an upper limit level gauge located at the upper limit height position of the powder in the buffer bin and a lower limit level gauge located at the lower limit height position of the powder in the buffer bin.

[0124] In a possible embodiment, refer to Figure 5, the feeding device 400 includes a feeding bin 410 and a feeding structure 420. The feeding bin 410 is used to store powder materials. The feeding structure 420 includes a feeding trough 4201 and a screw feeder 4202 disposed in the feeding trough 4201. The feeding trough 4201 extends along a first horizontal direction. The feeding trough 4201 has a third inlet 4201a and a third outlet 4201b. The third inlet 4201a is communicated with the feeding bin 410, and the third outlet 4201b faces the buffer bin 210. The screw feeder 4202 is used to push the powder materials in the feeding trough 4201 towards the third outlet 4201b and enter the buffer bin 210 through the third outlet 4201b.

[0125] The screw feeder 4202 continuously rotates in the feeding trough 4201, which can stably push the powder materials along the feeding trough 4201 towards the third outlet 4201b, and can stir the powder materials during the feeding process, ensuring that the powder materials can evenly enter the buffer bin 210, avoiding the problem of uneven accumulation of powder materials in the buffer bin 210 caused by uneven feeding, laying a foundation for the subsequent feeding device 200 to stably supply materials to the film forming device 100, contributing to improving the stability of the pole piece production and the consistency of the product quality, and by controlling the rotation speed of the screw feeder 4202, the conveying amount of the powder materials can be accurately adjusted.

[0126] In a possible embodiment, refer to Figure 5 , a control valve 4203 electrically connected to the control module is provided at the third outlet 4201b. The control module is used to control the opening or closing of the control valve 4203 according to the powder material height detected by the second detection member 210a in the buffer bin 210, so that the third outlet 4201b is in an open state or a closed state.

[0127] During the production process, the second detection member 210a in the buffer bin 210 continuously monitors the powder material height in the buffer bin 210 and transmits the data to the control module without interruption. After receiving the data, the control module compares it with a preset powder material height threshold. If the detected height is lower than the lower threshold, it indicates that the powder materials in the buffer bin 210 are insufficient, and the control module sends an opening instruction to the control valve 4203; if the detected height reaches or exceeds the upper threshold, it means that the powder materials are sufficient, and the control module sends a closing instruction. After receiving the instruction from the control module, the control valve 4203 quickly responds. When receiving the opening instruction, the valve opens, making the third outlet 4201b of the feeding trough 4201 unblocked, and the powder materials can enter the buffer bin 210 from the third outlet 4201b; when receiving the closing instruction, the valve closes, blocking the third outlet 4201b and stopping the powder material conveying.

[0128] In this way, by means of real-time monitoring and automatically controlling the opening and closing of the control valve 4203, precise control over the amount of powder materials entering the buffer silo 210 is achieved, avoiding excessive or insufficient powder materials, ensuring stable production, improving product quality. The entire control process requires no manual intervention and is automatically completed by the control module, greatly enhancing the degree of production automation, reducing labor costs, minimizing human operation errors. Moreover, when the powder materials in the buffer silo 210 reach the upper limit, the control valve 4203 is promptly closed to prevent powder material overflow, which may cause waste and environmental pollution, effectively controlling production costs.

[0129] Among them, the above-mentioned control valve 4203 can be a control valve 4203 in any form such as an electric ball valve, a pneumatic butterfly valve, an electromagnetic slide valve, etc., and is not limited herein.

[0130] In a possible embodiment, refer to Figure 3 , a fourth vibrating member 430 is provided at the discharge port of the feeding silo 410. The fourth vibrating member 430 is used to dredge the discharge port of the feeding silo 410 when the powder materials block the discharge port of the feeding silo 410.

[0131] Among them, the fourth vibrating member 430 can be an electromagnetic vibrating member, a motor vibrator, a vibrating motor, a pneumatic vibrator, etc. In a preferred embodiment, the fourth vibrating member 430 is a pneumatic vibration hammer.

[0132] In a possible embodiment, refer to Figure 5 , the pole piece production equipment 1 includes a bracket 500 and a pressure sensor 600 disposed on the bracket 500. The feeding device 400 is disposed on the bracket 500. The pressure sensor 600 is disposed between the feeding device 400 and the bracket 500. The pressure sensor 600 is used to detect the weight of the feeding device 400. The pressure sensor 600 is electrically connected to the control module. The feeding device 400 further includes an alarm electrically connected to the control module. The control module is used to control the alarm to give an alarm according to the weight of the feeding device 400 detected by the pressure sensor 600 to remind the operator to add powder materials to the feeding silo 410 or stop adding powder materials to the feeding silo 410.

[0133] The pressure sensor 600 works continuously, detects the weight of the feeding device 400 in real time, and converts the detected weight data into an electrical signal, which is continuously transmitted to the control module. Because the weight of the feeding device 400 is mainly determined by the weight of the powder in the feeding bin 410, the weight data can intuitively reflect the powder inventory. After the control module receives the weight data from the pressure sensor 600, it will compare it with the preset weight threshold. If the detected weight is lower than the lower limit threshold, the control module determines that the powder in the feeding bin 410 is insufficient and needs to be added; if the detected weight reaches or exceeds the upper limit threshold, the control module determines that the powder is sufficient and no more needs to be added. When the control module determines that the operator needs to be reminded, it will send a control signal to the alarm. If the weight is lower than the lower limit threshold, the alarm sends an alarm signal to remind the operator to add powder to the feeding bin 410; if the weight reaches or exceeds the upper limit threshold, the alarm also sends a signal to remind the operator to stop adding powder. The alarm method can be a sound alarm, a flashing light alarm, or a simultaneous sound and light alarm, so that the operator can detect it in time.

[0134] By real-time monitoring of the weight of the feeding device 400 and timely reminding to add powder, it can ensure that the feeding silo 410 always has sufficient powder supply, avoid production interruptions due to powder shortage, maintain the continuity of the electrode production process, thereby improving production efficiency and reducing economic losses caused by downtime. The amount of powder added can also be accurately controlled to prevent excessive addition of powder from causing overflow or backlog waste in the feeding silo 410, effectively reducing production costs. At the same time, it avoids subsequent processing difficulties or affecting production quality due to excessive powder. In addition, the automatic monitoring and alarm functions reduce the work of frequent manual inspections of the amount of powder in the feeding silo 410, reduce labor costs, and improve the degree of automation in production.

[0135] In one possible embodiment, see Figure 2 , multiple feeding devices 200 are arranged along the second horizontal direction, and the second horizontal direction is parallel to the extension direction of the roller 110; the loading device 400 is movably arranged on the bracket 500 along the second horizontal direction; the electrode production equipment 1 also includes a driving member connected to the loading device 400, and the driving member is electrically connected to the control module, and the control module is used to control the loading device 400 to move along the second horizontal direction to any cache silo 210 where powder needs to be added according to the height of the powder in the cache silo 210 detected by the second detection member 210a.

[0136] The second horizontal direction is Figure 2 The arrow Y in the middle points to the direction.

[0137] The second detection piece 210a arranged in each buffer bin 210 monitors the height of the powder in the buffer bin 210 in real time, and transmits the detected height data to the control module in the form of an electrical signal. After receiving the powder height data of each buffer bin 210, the control module compares it with the preset powder height threshold. When it is found that the powder height in a certain buffer bin 210 or some buffer bins 210 is lower than the lower limit threshold, the control module determines that the buffer bin 210 needs to be filled with powder. According to the judgment result, the control module sends a control signal to the driving part. After receiving the signal, the driving part drives the feeding device 400 to move along the second horizontal direction (parallel to the extension direction of the rolling mill 110). The feeding device 400 will accurately move to the buffer bin 210 where powder needs to be added. After the feeding device 400 reaches the specified position of the buffer bin 210, the control module controls the feeding device 400 to turn on the feeding structure 420 and convey the powder into the buffer bin 210.

[0138] Feeding the buffer bins 210 of multiple feeding devices 200 through one feeding device 400 avoids the situation of separately equipping each buffer bin 210 with a feeding device 400, reduces the repeated investment in equipment, improves the overall utilization rate of the equipment, reduces the equipment cost. And during the production process, the powder consumption speeds of different buffer bins 210 may be different. The feeding device 400 can flexibly move to the buffer bin 210 where powder needs to be added according to the actual powder height of each buffer bin 210 for feeding, ensuring that each buffer bin 210 can be replenished with powder in time, meeting the different requirements of different buffer bins 210, and improving the flexibility and adaptability of production. In addition, the entire feeding process is automatically controlled by the control module, without manual intervention in the movement and feeding operation of the feeding device 400. This reduces the workload of manual operation, reduces the labor cost, and also avoids the problems of inaccurate or untimely feeding caused by human factors, improving the automation degree and production efficiency of production.

[0139] In a possible embodiment, refer to Figure 2 and Figure 5 , a guiding slide rail 510 and a guiding slider 520 cooperating with the guiding slide rail 510 are arranged on the support 500. The guiding slide rail 510 extends along the second horizontal direction. The feeding bin 410 is arranged on the guiding slider, and the pressure sensor 600 is arranged between the feeding bin 410 and the guiding slider.

[0140] The cooperation between the guiding slide rail 510 and the guiding slider can provide accurate guiding for the feeding bin 410, ensuring that when the feeding bin 410 moves along the second horizontal direction, it moves strictly along the predetermined straight track, avoiding unstable situations such as deviation and shaking, thereby ensuring that the feeding device 400 can accurately align with the buffer bin 210 that needs to be filled with powder, improving the accuracy and reliability of feeding, and effectively sharing the weight and force of the feeding bin 410 during movement, making the movement of the feeding bin 410 more stable.

[0141] Moreover, by arranging the pressure sensor 600 between the feeding bin 410 and the guiding slider 520, the weight of the feeding bin 410 can be measured more accurately, ensuring that the pressure sensor 600 can accurately detect the weight change of the powder in the feeding bin 410, providing accurate data support for the control module.

[0142] This application also provides a method for manufacturing a pole piece, which is applied to the pole piece manufacturing equipment 1 in any of the above embodiments. Refer to Figure 6 , the method for manufacturing a pole piece includes:

[0143] S1, making the feeding device feed towards the extrusion part.

[0144] Specifically, the first inlet 2201a of the first trough 2201 receives the powder from the buffer bin 210, and the first vibrating member 2202 starts to work. Since the first trough 2201 in the first vibrating feeding structure 220 is connected to the buffer bin 210, it can drive the bottom of the first trough 2201 to vibrate. Under the action of the vibration force, the powder in the first trough 2201 overcomes the resistance such as friction and moves from the first inlet 2201a to the first outlet 2201b. When the powder reaches the first outlet 2201b, the screen 2203 can screen the powder to remove the possible large particles or agglomerates. The powder screened by the screen 2203 enters the second inlet 2301a of the second trough 2301 of the second vibrating feeding structure 230 from the first outlet 2201b. The second vibrating member 2302 drives the bottom of the second trough 2301 to vibrate, causing the powder to move from the second inlet 2301a to the second outlet 2301b under the action of the vibration force. Since the second outlet 2301b faces the extrusion part between the two rollers 110, after the powder reaches the second outlet 2301b, it will fall into the extrusion part between the two rollers 110.

[0145] S2, measuring the height of the powder accumulated at the extrusion part.

[0146] Specifically, according to the position and spatial layout of the extrusion part, a suitable laser distance sensor can be selected and installed at a position where it can vertically aim downwards at the powder accumulation area of the extrusion part, ensuring that the laser beam emitted by the sensor can directly irradiate the powder surface. Use a standard ranging target to calibrate the laser distance sensor. By measuring the target with a known distance, adjust the parameters of the sensor to make its measurement data accurate and reliable. Record the calibration parameters and turn on the laser distance sensor to ensure it is in a normal working state. The laser distance sensor continuously emits laser beams to the powder surface of the extrusion part, and the laser beams are reflected by the powder surface and then return to the sensor. The sensor calculates the real-time distance value from the sensor to the powder surface based on the time difference between laser emission and reception, combined with the speed of light and the pre-calibrated parameters. To improve the measurement accuracy, multiple measurements can be taken at a certain time interval (such as multiple times per second), and the measurement data is filtered to remove outliers, and the average value is taken as the measurement distance at the current moment. Subtract the real-time distance value obtained from the measurement from the initial distance value when there is no powder accumulation, and the difference is the height of the accumulated powder at the extrusion part.

[0147] Alternatively, an ultrasonic distance sensor with a suitable frequency and range can be selected and installed at a suitable position above the extrusion part, ensuring that the ultrasonic emission direction of the sensor is vertically downward and aimed at the powder accumulation area, and avoiding interference from surrounding obstacles to the ultrasonic wave propagation. Start the ultrasonic distance sensor and wait for it to work stably. During the production process, the ultrasonic distance sensor periodically emits ultrasonic pulses to the powder surface. The ultrasonic waves are reflected back after encountering the powder surface in the air and are received by the sensor. The sensor calculates the distance from the sensor to the powder surface based on the time difference between the emission and reception of the ultrasonic pulses, combined with the propagation speed of ultrasonic waves in the air (considering the influence of environmental temperature on the sound speed, the environmental temperature can be measured in real time and the sound speed can be corrected). Similarly, to improve the measurement accuracy, statistical analysis is performed on the multiple measurement data, and the average value is taken as the current measurement distance after removing outliers. Subtract the distance obtained from the current measurement from the reference distance when there is no powder accumulation, and the resulting difference is the height of the accumulated powder at the extrusion part.

[0148] Of course, an industrial camera with high resolution and appropriate frame rate can also be selected and installed at a position where the powder accumulation area in the extrusion part can be clearly photographed. Adjust the camera angle to ensure that the photographed image completely covers the powder accumulation area without occlusion. Use a standard calibration board to calibrate the camera to obtain the internal parameters of the camera (such as focal length, principal point coordinates, etc.) and external parameters (such as rotation and translation parameters of the camera), and establish a camera imaging model for accurately calculating the actual distance from the subsequent image. Collect a background image when there is no powder accumulation in the extrusion part and store it. During the operation of the equipment, the industrial camera continuously collects images of the powder accumulation area in the extrusion part at a set frame rate (such as 10 frames per second). Preprocess the collected images, including operations such as grayscale conversion, filtering (such as Gaussian filtering to remove noise), and contrast enhancement, to improve the image quality for subsequent image processing and analysis. Use an image segmentation algorithm (such as methods based on threshold segmentation, edge detection, etc.) to extract the contour of the powder accumulation area from the preprocessed image. According to the parameters obtained by camera calibration and combined with the pixel information of the powder contour in the image, calculate the three-dimensional coordinates of each point on the powder surface relative to the camera through the principle of triangulation or other geometric calculation methods. Select the highest point in the powder accumulation area and calculate the height difference between this point and the corresponding position when there is no powder accumulation to obtain the height of the accumulated powder at the extrusion part.

[0149] S3. If the height of the accumulated powder at the extrusion part reaches the first preset lower limit height, start the roller to rotate to extrude the accumulated powder at the extrusion part into a film.

[0150] Specifically, compare and judge the measured powder height data with the pre-set first preset lower limit height. When the detected powder height gradually approaches the first preset lower limit height, start the roller 110 to rotate. As the roller 110 rotates, the accumulated powder at the extrusion part begins to be extruded into a film under the pressure of the roller 110.

[0151] In this way, the roller 110 starts to rotate to extrude the powder into a film only when the height of the accumulated powder at the extrusion part reaches the first preset lower limit height. Only when the powder height reaches a certain lower limit can it be ensured that there is sufficient and uniform powder supply during the extrusion of the roller 110, so that the thickness of the extruded electrode sheet is more uniform. If the extrusion starts when the powder height is insufficient, it may lead to an overly thin local thickness of the electrode sheet.

[0152] In a possible embodiment, the electrode sheet production equipment 1 further includes a first detection member 300. The first detection member 300 is electrically connected to the control module. The first detection member 300 is used to detect the height of the accumulated powder at the extrusion part. The feeding device 200 further includes a second material tank 2301 and a second vibrating member 2302 connected to the second material tank 2301. The second material tank 2301 extends along the first horizontal direction. The first vibrating member 2202 and the second vibrating member 2302 are electrically connected to the control module. After S3, seeFigure 7 , the method for producing the electrode sheet further includes:

[0153] S3a1. Select an interval of the height of the powder stack at the extrusion part, and determine the first upper limit height and the first lower limit height.

[0154] Specifically, referring to the requirements of the electrode sheet production process, clarify the required powder amount and the corresponding stacking height range for different specifications of electrode sheets. At the same time, combining the extrusion performance parameters of the rolling roller 110, such as the maximum and minimum powder heights that can be effectively extruded, and comprehensively considering factors such as the operation stability of the equipment and the consistency of the electrode sheet quality, extrusion film-forming experiments can be carried out at different powder heights in the laboratory or on a small-scale production line, observe the quality of the electrode sheet, including indicators such as thickness uniformity and density distribution, record the powder height range corresponding to the best quality, and determine the first upper limit height and the first lower limit height according to the analysis and test results. For example, set the first lower limit height as the minimum powder height to ensure the quality of the electrode sheet, and set the first upper limit height as the maximum powder height to prevent powder overflow or affect the normal operation of the equipment.

[0155] S3a2. Select a preset height value of the powder stack at the extrusion part, and the preset height value is higher than the first lower limit height and lower than the first upper limit height.

[0156] Specifically, select a height (the median value can be selected) between the determined first upper limit height and the first lower limit height as the preset height value.

[0157] S3a3. Measure the feeding speed of the extrusion part.

[0158] Specifically, select appropriate flow measurement equipment, such as an electronic scale, a volumetric flowmeter, etc., to measure the powder amount consumed by the extrusion part per unit time. Under a stable production state, set a fixed measurement time period, such as 5 - 10 minutes, to ensure that the feeding situation of the extrusion part is representative during this period. During the selected time period, record the reduction amount of the powder multiple times, calculate the feeding speed each time, and then take the average value as the feeding speed of the extrusion part.

[0159] S3a4. Determine the vibration frequency of the second vibrating part according to the preset height value and the feeding speed of the extrusion part, and this vibration frequency is the first vibration frequency.

[0160] Through experiments or theoretical analysis, establish a mathematical relationship model between the powder height, the feeding speed, and the vibration frequency of the second vibrating part 2302. For example, according to the material conveying principle, determine the functional relationship between the vibration frequency and the powder conveying amount, substitute the preset height value and the measured feeding speed into the mathematical model, and calculate the vibration frequency required for the second vibrating part 2302 to maintain the preset height value, that is, the first vibration frequency.

[0161] S3a5. Determine the vibration frequency of the first vibration member according to the vibration frequency of the second vibration member, and this vibration frequency is the second vibration frequency.

[0162] Specifically, clarify the cooperation mechanism between the first vibration member 2202 and the second vibration member 2302 during the powder conveying process, and determine the proportional relationship or other association methods between their vibration frequencies. For example, according to the structure of the feeding device 200 and the powder flow characteristics, determine the vibration frequency ratio of the first vibration member 2202 to the second vibration member 2302. According to the first vibration frequency of the determined second vibration member 2302 and the association relationship between the two, calculate the required vibration frequency of the first vibration member 2202, that is, the second vibration frequency.

[0163] S3a6. Make the second vibration member vibrate at the first vibration frequency and the second vibration member vibrate at the second vibration frequency, so that the feeding device feeds materials towards the extrusion part.

[0164] Specifically, input the first vibration frequency and the second vibration frequency into the control module, and respectively set the vibration frequency parameters of the second vibration member 2302 and the first vibration member 2202. Start the feeding device 200, and the control module drives the first vibration member 2202 and the second vibration member 2302 to start vibrating according to the set frequency parameters, so that the powder is conveyed from the feeding device 200 to the extrusion part.

[0165] S3a7. Set the first preset upper limit height and the first preset lower limit height in the control module.

[0166] Specifically, in the operation interface of the control module, accurately input the previously determined first preset upper limit height and the first preset lower limit height to the corresponding positions.

[0167] S3a8. The first detection member transmits the detected actual powder height information at the extrusion part to the control module.

[0168] Specifically, the first detection member 300 (such as a laser distance sensor, an ultrasonic sensor, etc.) continuously monitors the powder height piled up at the extrusion part in real time, obtains powder height data according to the set sampling frequency (such as 1 - 5 times per second), converts the detected physical signal (such as a distance signal) into an electrical signal or a digital signal, and transmits the signal to the control module through a wired or wireless transmission method (such as RS485 bus, Wi-Fi, etc.). The control module receives the transmitted powder height data and performs preprocessing operations such as filtering and amplification on the data to remove noise interference and ensure the accuracy and reliability of the data.

[0169] S3a9. The control module compares the actual powder height piled up in the extrusion part with the first preset upper limit height and the first preset lower limit height.

[0170] Specifically, the control module reads the values of the first preset upper limit height and the first preset lower limit height from the data storage area, as well as the actual powder height data transmitted in real time by the first detector 300, and uses the comparison algorithm inside the control module to compare the actual powder height with the first preset upper limit height and the first preset lower limit height respectively.

[0171] S3a10, if the actual powder height accumulated in the extrusion part is greater than the first preset upper limit height, the control module controls the vibration frequencies of the first vibrator and the second vibrator to gradually decrease until the actual powder height accumulated in the extrusion part is lower than the first preset upper limit height and higher than the first preset lower limit height. If the actual powder height accumulated in the extrusion part is less than the first preset lower limit height, the control module controls the vibration frequencies of the first vibrator and the second vibrator to gradually increase until the actual powder height accumulated in the extrusion part is lower than the first preset upper limit height and higher than the first preset lower limit height.

[0172] Specifically, if the actual powder height accumulated in the extrusion part is less than the first preset lower limit height, the control module controls the vibration frequencies of the first vibrator 2202 and the second vibrator 2302 to gradually increase until the actual powder height accumulated in the extrusion part is lower than the first preset upper limit height and higher than the first preset lower limit height. A detailed vibration frequency adjustment strategy can be formulated according to the response characteristics of the equipment and production experience. For example, when the actual powder height is greater than the upper limit, the amplitude of each decrease in the vibration frequency is 5%-10% of the current frequency; when the actual powder height is less than the lower limit, the amplitude of each increase in the vibration frequency is 3%-8% of the current frequency. During the process of adjusting the vibration frequency, the first detector 300 continuously monitors the powder height at the extrusion part and transmits the data to the control module in real time. The control module judges whether the target height range is reached according to the feedback data. If not, the vibration frequency is continuously adjusted until the actual powder height accumulated in the extrusion part is between the first preset upper limit height and the first preset lower limit height.

[0173] Similarly, if the actual powder height accumulated in the extrusion part is higher than the first preset upper limit height, the control module controls the vibration frequencies of the first vibrator 2202 and the second vibrator 2302 to gradually decrease until the actual powder height accumulated in the extrusion part is lower than the first preset upper limit height and higher than the first preset lower limit height.

[0174] In this way, by real-time monitoring and adjusting the powder height of the extrusion part, the amount of powder entering the roller 110 for extrusion can be ensured to be stable and uniform, so that during the extrusion process of the roller 110, the pressure exerted on the powder is more uniform, thereby making the thickness of the produced diaphragm more consistent, improving the overall quality and performance of the electrode sheet. Moreover, the control module automatically adjusts the vibration frequency of the vibrating part according to the detection data without manual intervention, greatly shortening the adjustment time. During the production process, once the powder height of the extrusion part fluctuates, the system can quickly respond and make adjustments, reducing the production stagnation or product quality decline caused by untimely manual adjustment, and improving the production continuity and efficiency.

[0175] In a possible embodiment, the electrode sheet production device 1 further includes a feeding device 400. A second detection member 210a electrically connected to the control module is provided in the buffer bin 210. The second detection member 210a is used to detect the height of the powder in the buffer bin 210. After S3, refer to Figure 8 , the electrode sheet production method includes:

[0176] S3b1, set a second preset upper limit height and a second preset lower limit height in the control module.

[0177] Specifically, during the electrode sheet production process, determine the optimal stock range of the powder in the buffer bin 210. Considering factors such as the requirements for the continuity and stability of powder supply in different electrode sheet production processes, as well as the actual volume, shape, and discharge rate of the buffer bin 210, etc. For example, if the electrode sheet production speed is relatively fast and the requirement for the timeliness of powder supply is high, then the lower limit height should be relatively high to ensure that production is not interrupted due to insufficient powder; if the buffer bin 210 is relatively large and the discharge is relatively stable, the difference range between the upper and lower limits can be appropriately adjusted, and the determined second preset upper limit height and second preset lower limit height are input into the control module.

[0178] S3b2, the second detection member transmits the detected powder height information in the buffer bin to the control module.

[0179] Specifically, after the electrode sheet production device 1 is started, the second detection member 210a monitors the powder height in the buffer bin 210 in real time according to the set sampling frequency (such as 1 - 5 times per second). The second detection member 210a emits a signal (such as ultrasonic wave, electromagnetic wave, etc.) and receives the reflected signal, and calculates the distance between the powder surface and the detection member according to the propagation time of the signal and relevant physical principles, thereby obtaining the powder height data. The physical signal (such as electrical signal, digital signal, etc.) representing the powder height measured by the second detection member 210a is transmitted to the control module through a wired transmission method (such as RS485 bus, Ethernet, etc.) or a wireless transmission method (such as Wi-Fi, Bluetooth, etc.).

[0180] In S3b3, the control module compares the powder height in the buffer bin with the second preset upper limit height and the second preset lower limit height.

[0181] Specifically, after the control module receives the powder height data transmitted by the second detector 210a, it first reads and analyzes the data, restores the received signal to the actual powder height value, reads the previously set values of the second preset upper limit height and the second preset lower limit height from the parameter storage area of the control module, and uses the internal comparison algorithm and logical judgment program of the control module to compare the preprocessed powder height in the buffer bin 210 with the second preset upper limit height and the second preset lower limit height to determine whether the powder height is less than the second preset lower limit height, greater than the second preset upper limit height, or between the two.

[0182] In S3b4, if the powder height in the buffer bin is less than the second preset lower limit height, the control module controls the feeding device to feed powder into the buffer bin; if the powder height in the buffer bin reaches the second preset upper limit height, the control module controls the feeding device to stop feeding powder into the buffer bin.

[0183] Specifically, when the control module determines that the powder height in the buffer bin 210 is less than the second preset lower limit height, it immediately triggers the feeding control program, sends a start signal and corresponding control instructions to the driving devices (such as motor controllers, valve drivers, etc.) connected to the feeding device 400 according to the pre-set feeding strategy and parameters. For example, for the feeding device 400 using a screw conveyor, the control module sends a start command to its motor controller and adjusts the motor speed according to the powder demand to control the powder conveying volume; for the feeding device 400 using pneumatic valve control, the control module opens the corresponding valve and adjusts the valve opening to control the powder flow rate. During the process of the feeding device 400 feeding powder into the buffer bin 210, the control module continuously receives the powder height data transmitted by the second detector 210a and monitors the change of the powder height in the buffer bin 210 in real time. When the control module detects that the powder height in the buffer bin 210 reaches the second preset upper limit height, it immediately sends a stop feeding instruction to the driving device of the feeding device 400. After receiving the instruction, the driving device quickly executes the corresponding stop operation, such as stopping the motor rotation of the screw conveyor, closing the pneumatic valve, etc., to make the feeding device 400 stop feeding powder into the buffer bin 210.

[0184] In this way, by real-time monitoring and automatic control of the feeding, it is ensured that the buffer bin 210 always has sufficient powder supply, avoiding production interruption caused by powder shortage, maintaining the continuity of the pole piece production process, improving production efficiency, and enabling precise control of the feeding amount to prevent excessive powder accumulation in the buffer bin 210, reducing waste caused by powder backlog, lowering production costs, making the entire feeding process without frequent manual intervention, automatically controlled by the control module according to the detection data, improving the automation level of the pole piece production equipment 1, reducing labor costs, and at the same time reducing the risk of human operation errors.

[0185] In some possible embodiments, the pole piece production equipment 1 further includes a feeding device 400 and a pressure sensor electrically connected to the control module. The pressure sensor is used to detect the weight of the feeding device 400. The feeding device 400 includes an alarm electrically connected to the control module. The control module is used to control the alarm to alarm according to the weight of the feeding device 400 detected by the pressure sensor 600. After S3, see Figure 9 , the pole piece production method further includes:

[0186] S3c1, set a preset upper limit weight and a preset lower limit weight in the control module.

[0187] Specifically, considering the production process of the pole piece, production speed, and characteristics such as the density and fluidity of the material. For example, if the pole piece model to be produced has strict requirements for the amount of material and the material density is large, then the preset weight range needs to be accurately set; if the material has poor fluidity, the lower limit weight may need to be appropriately adjusted to prevent insufficient material from affecting production continuity. Input the determined preset upper limit weight and preset lower limit weight into the control module.

[0188] S3c2, the pressure sensor transmits the detected weight information of the feeding device to the control module.

[0189] Specifically, the pressure sensor monitors the weight of the feeding device 400 in real time according to the set sampling frequency (such as 1 - 5 times per second). The sensor converts the sensed pressure signal into an electrical signal, and calculates the real-time weight data of the feeding device 400 according to the corresponding relationship between pressure and weight, and transmits the converted signal to the control module through a wired transmission method (such as RS485 bus, Ethernet, etc.) or a wireless transmission method (such as Wi-Fi, Bluetooth, etc.).

[0190] S3c3, the control module compares the weight of the feeding device with the preset weight upper limit and preset lower limit weight.

[0191] Specifically, after the control module receives the weight data transmitted by the pressure sensor, it first reads and analyzes the data, restores the received signal to the actual weight value of the feeding device 400, preprocesses the read data, and uses a filtering algorithm to remove abnormal data points caused by measurement errors or interference to ensure the accuracy and reliability of the data. For example, the median filtering algorithm is used to process multiple consecutive measurement data to obtain a more accurate weight value. The values of the preset upper limit weight and the preset lower limit weight set previously are read from the parameter storage area of the control module, and the weight of the feeding device 400 after preprocessing is compared with the preset upper limit weight and the preset lower limit weight using the comparison algorithm and the logical judgment program inside the control module to determine whether the weight of the feeding device 400 is less than the preset lower limit weight, greater than the preset upper limit weight, or between the two.

[0192] S3c4, if the weight of the feeding device is less than the preset lower limit weight, the control module controls the alarm to give an alarm. If the weight of the feeding device reaches the preset upper limit weight, the control module controls the alarm to give an alarm.

[0193] Specifically, when the control module determines that the weight of the feeding device 400 is less than the preset lower limit weight, it immediately triggers the alarm control program and sends an alarm signal and related instructions to the alarm according to the preset alarm method (such as sound and light alarm, etc.). For example, for a sound and light alarm, the control module controls it to emit a sound with a specific frequency and flashing lights to remind the operator to add powder to the feeding device 400. When the control module detects that the weight of the feeding device 400 reaches the preset upper limit weight, it also quickly sends an alarm instruction to the alarm, and the alarm performs corresponding operations according to the set alarm method to remind the operator that the material in the feeding device 400 is full, preventing material overflow or equipment overload.

[0194] In this way, by real-time monitoring the weight of the feeding device 400 and timely reminding to add powder, it can ensure that there is always sufficient powder supply in the feeding bin 410, avoid production interruption caused by powder shortage, maintain the continuity of the pole piece production process, thereby improving production efficiency and reducing economic losses caused by downtime. Moreover, the powder addition amount can be accurately controlled to prevent overflow or backlog waste of the feeding bin 410 due to excessive powder addition, effectively reducing production costs. At the same time, it avoids problems such as difficulties in subsequent processing or affecting production quality caused by excessive powder. In addition, the automatic monitoring and alarm function reduces the work of manually frequently checking the powder amount in the feeding bin 410, reduces labor costs, and improves the automation degree of production.

[0195] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application.

Claims

1. A pole piece production device (1), characterized in that, Comprising: A film forming device (100), the film forming device (100) at least includes two rolling rollers (110), the two rolling rollers (110) are arranged along a first horizontal direction, a roll gap between adjacent rolling rollers (110) forms an extrusion part, and the first horizontal direction is perpendicular to the extending direction of the rolling rollers (110); A feeding device (200), the feeding device (200) includes: A buffer bin (210); A first vibrating feeding structure (220), the first vibrating feeding structure (220) includes a first trough (2201) and a first vibrating member (2202), the first trough (2201) extends along the first horizontal direction, and the first trough (2201) has a first inlet (2201a) and a first outlet (2201b), the first inlet (2201a) is communicated with the buffer bin (210), a screen (2203) is arranged at the first outlet (2201b), and the first vibrating member (2202) is connected with the first trough (2201); A second vibrating feeding structure (230), the second vibrating feeding structure 230 includes a second trough (2301) and a second vibrating member (2302), the second trough (2301) extends along the first horizontal direction, and the second trough (2301) has a second inlet (2301a) and a second outlet (2301b), the second inlet (2301a) is communicated with the first outlet (2201b), the second outlet (2301b) faces the extrusion part and is open, and the second vibrating member (2302) is connected with the second trough (2301).

2. The pole piece production equipment (1) according to claim 1, characterized in that, The first vibrating member (2202) is arranged at an end of the first trough (2201) close to the first inlet (2201a), and the second vibrating member (2302) is arranged at an end of the second trough (2301) close to the second inlet (2301a).

3. The electrode sheet production equipment (1) according to claim 1, characterized in that, Further comprising: A control module and a first detector (300) electrically connected to the control module, the first detector (300) is used for detecting the height of the powder stack at the extrusion part; The control module is electrically connected with the first vibrating member (2202), and the control module is used for controlling the vibration frequency of the first vibrating member (2202) according to the height of the powder stack detected by the first detector (300) at the extrusion part; And / or, The control module is electrically connected with the second vibrating member (2302), and the control module is used for controlling the vibration frequency of the second vibrating member (2302) according to the height of the powder stack detected by the first detector (300) at the extrusion part.

4. The pole piece production equipment (1) according to claim 1, characterized in that, The screen (2203) is detachably arranged at the first outlet (2201b).

5. The pole piece production equipment (1) according to claim 1, characterized in that, The first material tank (2201) is provided with a collection port (2201c) away from the first inlet (2201a). Along the first horizontal direction, the first outlet (2201b) is located between the collection port (2201c) and the first inlet (2201a), and a collection member (2204) is provided at the collection port (2201c).

6. The pole piece production equipment (1) according to claim 5, characterized in that, Further comprising: A negative pressure member, the collection port (2201c) is communicated with the negative pressure member.

7. The pole piece production device (1) according to claim 1, characterized in that Both the first vibration member (2202) and the second vibration member (2302) are electromagnetic vibrators.

8. The pole piece production equipment (1) according to any one of claims 1-7, characterized in that, A third vibration member (240) is provided at the discharge port of the buffer bin (210).

9. The electrode sheet production equipment (1) according to claim 3, characterized in that The electrode sheet production equipment (1) further comprises a feeding device (400), and the feeding device (400) is electrically connected to the control module; A second detection member (210a) electrically connected to the control module is provided in the buffer bin (210).

10. The pole piece production equipment (1) according to claim 9, characterized in that: The feeding device (400) comprises: A feeding bin (410); A feeding structure (420), the feeding structure (420) comprises a feeding trough (4201) and a spiral feeding member (4202) arranged in the feeding trough (4201). The feeding trough (4201) extends along the first horizontal direction. The feeding trough (4201) has a third inlet (4201a) and a third outlet (4201b). The third inlet (4201a) is communicated with the feeding bin (410), and the third outlet (4201b) faces the buffer bin (210).

11. The tab production device (1) according to claim 10, characterized in that, A control valve (4203) electrically connected to the control module is provided at the third outlet (4201b). The control module is used to control the opening or closing of the control valve (4203) according to the powder height in the buffer bin (210) detected by the second detection member (210a), so that the third outlet (4201b) is in an open state or a closed state.

12. The electrode sheet production equipment (1) according to claim 10, characterized in that The electrode sheet production equipment (1) comprises a bracket (500) and a pressure sensor (600) arranged on the bracket (500). The feeding device (400) is arranged on the bracket (500). The pressure sensor (600) is arranged between the feeding device (400) and the bracket (500), and the pressure sensor (600) is electrically connected to the control module; The feeding device (400) further comprises an alarm electrically connected to the control module. The control module is used to control the alarm to alarm according to the weight of the feeding device (400) detected by the pressure sensor (600).

13. The electrode sheet production equipment (1) according to claim 12, characterized in that A plurality of the feeding devices (200) are arranged in a second horizontal direction, and the second horizontal direction is parallel to the extending direction of the rolling mill (110); The feeding device (400) is movably arranged on the bracket (500) along the second horizontal direction; The pole piece production equipment (1) further includes a driving member connected to the feeding device (400), the driving member is electrically connected to the control module, and the control module is used to control the feeding device (400) to move along the second horizontal direction to any one of the buffer bins (210) where powder needs to be added according to the height of the powder in the buffer bin (210) detected by the second detector (210a).

14. The pole piece production device (1) according to claim 13, characterized in that, A guiding slide rail (510) and a guiding slider (520) cooperating with the guiding slide rail (510) are arranged on the bracket (500), the guiding slide rail (510) extends along the second horizontal direction, the feeding bin (410) is arranged on the guiding slider (520), and a pressure sensor (600) is arranged between the feeding bin (410) and the guiding slider (520).

15. A method for producing a pole piece, applied to the pole piece production equipment according to any one of claims 1-14, characterized in that, The pole piece production method includes: S1, feeding the feeding device towards the extrusion part; S2, measuring the height of the powder accumulated at the extrusion part; S3, if the height of the powder accumulated at the extrusion part reaches the first preset lower limit height, start the rolling mill to extrude the powder accumulated at the extrusion part into a film.

16. The method for producing a pole piece according to claim 15, wherein the pole piece production equipment further comprises a first detection member, the first detection member is electrically connected to the control module, the first detection member is used for detecting the height of the powder accumulated at the extrusion part, the feeding device further comprises a second material tank and a second vibrating member connected to the second material tank, the second material tank extends along the first horizontal direction, the first vibrating member and the second vibrating member are electrically connected to the control module, and it is characterized in that, After S3, the pole piece production method further includes: S3a1, select the interval of the height of the powder accumulated at the extrusion part, and determine the first upper limit height and the first lower limit height; S3a2, select the preset height value of the powder accumulated at the extrusion part, the preset height value is higher than the first lower limit height and lower than the first upper limit height; S3a3, measure the feeding speed of the extrusion part; S3a4, determine the vibration frequency of the second vibrating member according to the preset height value and the feeding speed of the extrusion part, and this vibration frequency is the first vibration frequency; S3a5, determine the vibration frequency of the first vibrating member according to the vibration frequency of the second vibrating member, and this vibration frequency is the second vibration frequency; S3a6, vibrate the second vibrating member at the first vibration frequency and the second vibrating member at the second vibration frequency, so that the feeding device feeds towards the extrusion part; S3a7, set the first preset upper limit height and the first preset lower limit height in the control module; S3a8, the first detector transmits the information of the actual powder height accumulated at the extrusion part detected to the control module; S3a9, the control module compares the actual powder height accumulated in the extrusion part with the first preset upper limit height and the first preset lower limit height; S3a10, if the actual powder height accumulated in the extrusion part is greater than the first preset upper limit height, the control module respectively controls the vibration frequencies of the first vibrating member and the second vibrating member to gradually decrease until the actual powder height accumulated in the extrusion part is lower than the first preset upper limit height and higher than the first preset lower limit height, If the actual height of the powder accumulated in the extrusion part is less than the first preset lower limit height, the control module controls the vibration frequencies of the first vibration member and the second vibration member to gradually increase until the actual height of the powder accumulated in the extrusion part is lower than the first preset upper limit height and higher than the first preset lower limit height.

17. The method for producing a pole piece according to claim 15, wherein the pole piece production equipment further includes a feeding device, and a second detection member electrically connected to the control module is provided in the buffer bin, and the second detection member is used for detecting the height of the powder material in the buffer bin, characterized in that, After S3, the method for manufacturing the pole piece includes: S3b1, setting a second preset upper limit height and a second preset lower limit height in the control module; S3b2, the second detection member transmits the powder height information detected in the buffer bin to the control module; S3b3, the control module compares the powder height in the buffer bin with the second preset upper limit height and the second preset lower limit height; S3b4, if the powder height in the buffer bin is less than the second preset lower limit height, the control module controls the feeding device to feed the powder into the buffer bin; if the powder height in the buffer bin reaches the second preset upper limit height, the control module controls the feeding device to stop feeding the powder into the buffer bin.

18. The pole piece production method according to claim 15, wherein the pole piece production equipment further comprises a feeding device and a pressure sensor electrically connected to the control module, the feeding device comprises an alarm electrically connected to the control module, and the control module is configured to control the alarm to give an alarm according to the weight of the feeding device detected by the pressure sensor. Characterized in that, After S3, the method for manufacturing the pole piece further includes: S3c1, setting a preset upper limit weight and a preset lower limit weight in the control module; S3c2, the pressure sensor transmits the weight information detected of the feeding device to the control module; S3c3, the control module compares the weight of the feeding device with the preset weight upper limit and the preset lower limit weight; S3c4, if the weight of the feeding device is less than the preset lower limit weight, the control module controls the alarm to give an alarm; if the weight of the feeding device reaches the preset upper limit weight, the control module controls the alarm to give an alarm.

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