A defective product pole piece removing device

Abstract

The utility model discloses a kind of defective product pole piece rejection devices, comprising: positive and negative pressure switching assembly, positive and negative pressure switching assembly includes positive pressure part and negative pressure part;Rejection assembly, rejection assembly includes first driving part and rolling element, rolling element is connected with the driving end of first driving part, rolling element is tangent with the vacuum belt of conveying pole piece, positive pressure part and negative pressure part are connected with rolling element, rolling element is provided with multiple air holes, when pole piece is qualified product, positive pressure part exports positive pressure gas, so that positive pressure gas is blown out from air hole, to make the pole piece adhere vacuum belt;When pole piece is defective product, negative pressure part exports negative pressure, so that the pole piece is adsorbed on rolling element, to reject the pole piece.The utility model realizes that defective product pole piece is on vacuum belt without stopping to realize rejection action, reduce displacement or vibration to adjacent pole piece, ensure the position accuracy in pole piece conveying process, reduce the defective rate of lithium battery production, improve the production efficiency and quality of lithium battery.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing equipment technology, and in particular to a defective electrode rejection device. Background Technology

[0002] In the lithium battery manufacturing industry, the cutting and stacking machine is a key piece of equipment. Its processing accuracy of the electrode sheets directly affects the performance and quality of the battery. Among them, the rejection of defective electrode sheets is particularly important.

[0003] Currently, most integrated cutting and stacking machines on the market use a positive pressure method to remove defective electrode sheets. This method utilizes the time between electrode sheets stopping on a vacuum conveyor belt to perform positive pressure blowing for rejection. When a vision system above the conveyor assembly detects a defective electrode sheet, a PLC (Programmable Logic Controller) controls an electromagnetic reversing valve to open the positive pressure blowing device. A high-speed airflow then blows the defective electrode sheet off the conveyor belt and into a pre-set defective material collection box. However, in actual production, the high-speed positive pressure airflow sometimes fails to completely blow the electrode sheet off at once, leading to electrode sheet misalignment. Furthermore, the high-speed positive pressure airflow can cause significant displacement or vibration of adjacent electrode sheets, affecting the accuracy of subsequent stacking and increasing the defect rate in lithium-ion battery production. Utility Model Content

[0004] This utility model aims to solve at least one of the aforementioned technical problems existing in the prior art. Therefore, the purpose of this utility model is to provide a defective electrode rejection device that enables the rejection of defective electrodes on a vacuum conveyor belt without stopping, improving the stability of defective electrode feeding, reducing displacement or vibration of adjacent electrodes, ensuring positional accuracy during electrode transport, guaranteeing subsequent stacking accuracy, reducing the defect rate in lithium battery production, and improving the production efficiency and quality of lithium batteries.

[0005] The defective electrode rejection device according to a first aspect embodiment of the present invention includes: A positive and negative pressure switching component, comprising a positive pressure section and a negative pressure section; The rejection assembly includes a first driving member and a rolling member. The rolling member is connected to the driving end of the first driving member and is tangential to the vacuum belt that transports the electrode sheet. Both the positive pressure section and the negative pressure section are connected to the rolling member. The rolling member is provided with multiple vent holes. When the electrode sheet is a qualified product, the positive pressure section outputs positive pressure gas, causing the positive pressure gas to be blown out from the vent holes, so that the electrode sheet adheres to the vacuum belt. When the electrode sheet is a defective product, the negative pressure section outputs negative pressure, causing the electrode sheet to be adsorbed onto the rolling member, thereby rejecting the electrode sheet.

[0006] The defective electrode rejection device according to the embodiments of this utility model has at least the following beneficial effects: The defective electrode rejection device of this application, through the synergistic action of the positive and negative pressure switching component and the rejection component, when the electrode is a qualified product, the positive pressure gas output from the positive pressure section is blown out from the vent hole of the rolling element. Since the rolling element is tangent to the vacuum belt conveying the electrode, the positive pressure gas can act on the qualified electrode, causing it to adhere to the vacuum belt, so that the qualified electrode is conveyed to the next process via the vacuum belt; while when a defective electrode is detected, the negative pressure output from the negative pressure section forms an adsorption force through the vent hole of the rolling element. This method adsorbs defective electrode sheets onto the rolling element and removes them from the vacuum belt as the rolling element rotates. Compared with the existing method of using positive pressure blowing to remove defective electrode sheets during the interval when the electrode sheets stop on the vacuum belt, this method can remove defective electrode sheets without stopping on the vacuum belt, improving the stability of the defective electrode sheet feeding, reducing displacement or vibration to adjacent electrode sheets, ensuring the positional accuracy of the electrode sheets during the conveying process, guaranteeing the accuracy of subsequent stacking, reducing the defect rate of lithium battery production, and improving the production efficiency and quality of lithium batteries.

[0007] According to some embodiments of the present invention, the rejection assembly further includes a scraper, which is disposed on the outside of the rolling element. The scraper includes an air blowing section. When the rolling element adsorbs the electrode and rotates to a preset position, the air blowing section outputs gas to separate the rolling element from the adsorbed electrode.

[0008] According to some embodiments of the present invention, the scraper further includes a sealing film that covers at least a portion of the rolling element.

[0009] According to some embodiments of the present invention, the rejection assembly further includes a mounting frame, the rolling element is disposed in the mounting frame, the air blowing part is connected to the mounting frame, and the air outlet end of the air blowing part faces the side of the rolling element; The scraper also includes a first support portion and a second support portion, which are respectively disposed on opposite sides of the mounting bracket. The first support portion is connected to one end of the sealing film, and the second support portion is connected to the other end of the sealing film, so that the sealing film fits against the side of the rolling element.

[0010] According to some embodiments of the present invention, the rolling element is provided with a plurality of annular grooves in the circumferential direction, the annular grooves are provided corresponding to the air blowing part, an adsorption part is formed between two adjacent annular grooves, the adsorption part is provided corresponding to the sealing film, and the adsorption part is provided with a plurality of air holes.

[0011] According to some embodiments of the present invention, the rejection assembly further includes a connector, which is connected to the rolling element via a rotating element, and both the positive pressure part and the negative pressure part are connected to the connector.

[0012] According to some embodiments of the present invention, the positive and negative pressure switching assembly further includes an air source switching shaft and a second driving component, wherein the air source switching shaft is connected to the driving end of the second driving component; The outer surface of the gas source switching shaft is divided into a first circumferential side and a second circumferential side along its axial direction. The first circumferential side is provided with a plurality of spaced positive pressure channels, and the second circumferential side is provided with a plurality of spaced negative pressure channels. The positive pressure channels and the negative pressure channels are staggered along the axial direction of the gas source switching shaft. When the second driving component drives the air source switching shaft to rotate to the first preset position, the positive pressure channel is connected to the positive pressure section; When the second driving component drives the air source switching shaft to rotate to the second preset position, the negative pressure channel is connected to the negative pressure section.

[0013] According to some embodiments of the present invention, the positive pressure section includes a positive pressure inlet and a positive pressure outlet, both of which are connected to the positive pressure channel. The positive pressure inlet is connected to the positive pressure air source assembly, and the positive pressure outlet is connected to the rolling element. The negative pressure section includes a negative pressure inlet and a negative pressure outlet, both of which are connected to the negative pressure channel. The negative pressure inlet is connected to the negative pressure air source assembly, and the negative pressure outlet is connected to the rolling element.

[0014] According to some embodiments of this utility model, both the positive pressure air inlet and the negative pressure air inlet are provided in pairs, with the two positive pressure air inlets and the two negative pressure air inlets arranged symmetrically.

[0015] According to some embodiments of the present invention, along the axial direction of the gas source switching shaft, the gas source switching shaft is provided with a plurality of spaced annular mounting grooves, and the positive pressure channel and the adjacent negative pressure channel are provided with the annular mounting grooves. Each annular mounting groove is provided with a mounting ring, and the mounting ring is provided with a sealing ring. The sealing ring is used to improve the airtightness of the positive pressure channel and the negative pressure channel.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the defective electrode rejection device according to an embodiment of the present invention; Figure 2 for Figure 1 Enlarged view of section A; Figure 3 for Figure 1 One of the exploded views of the rejection assembly of the defective electrode rejection device shown; Figure 4 for Figure 1 The second exploded view of the rejection assembly of the defective electrode rejection device shown; Figure 5 for Figure 1 The third exploded view of the rejection assembly of the defective electrode rejection device shown; Figure 6 for Figure 1 One of the exploded views of the positive and negative pressure switching component of the defective electrode rejection device shown; Figure 7 for Figure 1 The second exploded view of the positive and negative pressure switching component of the defective electrode rejection device.

[0018] Reference numerals: 100, Positive / negative pressure switching assembly; 110, Positive pressure section; 111, Positive pressure air inlet; 112, Positive pressure air outlet; 120, Negative pressure section; 121, Negative pressure air inlet; 122, Negative pressure air outlet; 130, Air source switching shaft; 131, Positive pressure channel; 132, Negative pressure channel; 140, Second driving component; 150, Housing; 160, Mounting ring; 170, Sealing ring; 200, Removal component; 210, First drive component; 220, Rolling component; 221, Vent hole; 222, Annular groove; 223, Adsorption part; 230, Scraper; 231, Air blowing part; 232, Sealing membrane; 233, First support part; 234, Second support part; 240, Mounting bracket; 250, Connector; 260, Rotating component; 261, Base; 262, Rotating head; 270, Rotating shaft; 280, Synchronous belt assembly. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] Reference Figure 1 , Figure 2This utility model provides a defective electrode rejection device, including a positive and negative pressure switching component 100 and a rejection component 200. The positive and negative pressure switching component 100 includes a positive pressure part 110 and a negative pressure part 120. The rejection component 200 includes a first driving member 210 and a rolling member 220. The rolling member 220 is connected to the driving end of the first driving member 210. The rolling member 220 is tangent to the vacuum belt (not shown in the figure) that transports the electrode. The first driving member 210 drives the rolling member 220 to rotate, so that the linear speed of the rolling member 220 is the same as the speed of the vacuum belt that transports the electrode, ensuring that there is no relative displacement between the two during the electrode transport process. In addition, both the positive pressure section 110 and the negative pressure section 120 are connected to the rolling element 220. The rolling element 220 is provided with multiple vent holes 221. When the electrode is a qualified product, the positive pressure section 110 outputs positive pressure gas, which is blown out from the vent holes 221 so that the electrode adheres to the vacuum belt. When the electrode is a defective product, the negative pressure section 120 outputs negative pressure, which causes the electrode to be adsorbed on the rolling element 220 so that the electrode is rejected.

[0025] The defective electrode rejection device of this application, through the synergistic action of the positive and negative pressure switching component 100 and the rejection component 200, when the electrode is qualified, the positive pressure gas output from the positive pressure section 110 is blown out from the vent hole 221 of the rolling element 220. Since the rolling element 220 is tangential to the vacuum belt conveying the electrode, the positive pressure gas can act on the qualified electrode, causing it to adhere to the vacuum belt, so that the qualified electrode is conveyed to the next process via the vacuum belt. When a defective electrode is detected, the negative pressure output from the negative pressure section 120 forms an adsorption force through the vent hole 221 of the rolling element 220, thereby rejecting the defective electrode. The electrode sheet is adsorbed onto the rolling element 220 and detaches from the vacuum belt as the rolling element 220 rotates, thus achieving rejection. This application uses adsorption to remove defective electrode sheets. Compared with the existing method of using positive pressure blowing to remove defective electrode sheets during the interval when the electrode sheet stops on the vacuum belt, it can achieve the rejection action of defective electrode sheets without stopping on the vacuum belt, improve the stability of the defective electrode sheet falling, reduce the displacement or vibration of adjacent electrode sheets, ensure the positional accuracy of the electrode sheet during the electrode sheet conveying process, ensure the accuracy of subsequent stacking, reduce the defect rate of lithium battery production, and improve the production efficiency and quality of lithium batteries.

[0026] It should be noted that whether the electrode is a qualified product or a defective product is determined by the previous process, and the principle and process will not be described in detail here.

[0027] In some embodiments, the vacuum belt is inverted, and the vacuum belt uses vacuum adsorption electrodes, meaning the electrodes are adsorbed below the vacuum belt. It should be noted that the inverted vacuum belt adsorption of electrodes is prior art, and this invention does not improve upon this aspect; therefore, its principle and process will not be described in detail.

[0028] Reference Figure 2 , Figure 3 , Figure 4 In some embodiments, the rejection assembly 200 further includes a scraper 230 disposed on the outer side of the rolling element 220. The scraper 230 includes an air blowing section 231, each air blowing section 231 being connected to a first positive pressure air source assembly (not shown in the figure). When the rolling element 220 adsorbs the electrode and rotates to a preset position, the air blowing section 231 outputs positive pressure gas. The thrust of the positive pressure gas quickly breaks the negative pressure adsorption state between the rolling element 220 and the electrode, separating the rolling element 220 from the adsorbed electrode. Specifically, the air blowing section 231 is disposed on the lower side of the rolling element, with the electrode adsorbed on the top of the rolling element 220. When the rolling element 220 rotates clockwise to the preset position, the air blowing section 231 outputs positive pressure gas, thereby separating the rolling element 220 from the electrode. Furthermore, a collection groove is provided directly below the scraper 230, allowing defective electrode sheets blown off by the air blowing section 231 to fall into the collection groove for collection.

[0029] Reference Figure 2 , Figure 3 In some embodiments, the scraper 230 further includes a sealing film 232, which covers at least a portion of the rolling element 220, so that the sealing film 232 can seal some of the vent holes 221 on the rolling element 220. The sealing film 232 can reduce the air pressure leakage when the rolling element 220 generates negative pressure to adsorb defective electrode sheets or outputs positive pressure gas to adhere to qualified electrode sheets, ensuring that the positive pressure gas output by the positive pressure section 110 can be blown out more concentratedly from the corresponding vent holes 221, enhancing the adhesion effect between qualified electrode sheets and the vacuum belt, while making the negative pressure generated by the negative pressure section 120 more stable, improving the adsorption force on defective electrode sheets, and avoiding problems such as poor electrode sheet adhesion or unstable adsorption due to insufficient air pressure.

[0030] Reference Figure 3 , Figure 5In some embodiments, the rejection assembly 200 further includes a mounting bracket 240, a rolling element 220 disposed within the mounting bracket 240, and an air blowing section 231 connected to the mounting bracket 240. The air outlet of the air blowing section 231 faces the side of the rolling element 220 to ensure the accuracy of the blowing direction and position, so that the positive pressure gas can accurately act on the contact area between the rolling element 220 and the defective electrode sheet, thereby improving the separation effect. In addition, the scraper 230 also includes a first support part 233 and a second support part 234. The first support part 233 and the second support part 234 are respectively disposed on opposite sides of the mounting frame 240. The first support part 233 is connected to one end of the sealing film 232, and the second support part 234 is connected to the other end of the sealing film 232, so that the sealing film 232 fits against the side of the rolling element 220, enhances the sealing effect on the upper part of the vent hole 221 of the rolling element 220, further reduces air pressure leakage, ensures the stability and strength of air pressure when the positive pressure qualified electrode sheet is attached to the vacuum belt and the negative pressure adsorbs the defective electrode sheet, and avoids the problem of poor electrode sheet adhesion or unstable adsorption due to poor sealing.

[0031] In some embodiments, the sealing film 232 can be made of PET film. PET film has good flexibility and surface smoothness, and when it is applied to the rolling element 220, it can adapt to its curved structure to ensure the sealing effect on the vent 221 and reduce air pressure leakage. At the same time, PET film has high mechanical strength and wear resistance, and is not easily damaged under the friction of continuous rotation of the rolling element 220, so it can maintain sealing performance for a long time and extend its service life. Of course, in actual design, the material of the sealing film 232 can be designed according to actual needs.

[0032] Reference Figure 2 , Figure 3 , Figure 5In some embodiments, the rolling element 220 is provided with a plurality of annular grooves 222 circumferentially. The annular grooves 222 are correspondingly arranged with the air blowing part 231, so that the positive pressure gas output by the air blowing part 231 can act on the area of ​​the annular grooves 222. When the rolling element 220 rotates to a preset position, the airflow can enter the annular grooves 222, enhancing the separation force on the defective electrode sheets adsorbed on the adsorption part 223, and facilitating the separation of the rolling element 220 from the defective electrode sheets. In addition, an adsorption part 223 is formed between two adjacent annular grooves 222. The adsorption part 223 is correspondingly arranged with the sealing film 232. The adsorption part 223 is provided with a plurality of vent holes 221. The sealing film 232 can tightly fit the adsorption part 223, sealing the vent holes 221 on the adsorption part 223, reducing air pressure leakage during negative pressure adsorption or positive pressure blowing, ensuring the stable adsorption force of the adsorption part 223 on the defective electrode sheets under negative pressure, and the force on the qualified electrode sheets under positive pressure, so that they are tightly attached to the vacuum belt. Meanwhile, the spacing between the annular groove 222 and the adsorption section 223 provides space for the function of the blowing section 231, and the adsorption section 223 ensures the adsorption or blowing effect on the electrode sheet, further improving the accuracy and stability of the rolling element 220, thereby ensuring the rejection effect of defective electrode sheets, reducing interference with adjacent qualified electrode sheets, maintaining the subsequent stacking accuracy, and reducing the defect rate of lithium battery production.

[0033] Reference Figure 3 , Figure 5 In some embodiments, the rejection assembly 200 further includes a connector 250, which is connected to the rolling element 220 via a rotating element 260. Both the positive pressure section 110 and the negative pressure section 120 are connected to the connector 250. Specifically, the connector 250 is provided with a first air passage, the rotating element 260 is provided with a second air passage, and the rolling element 220 is provided with a third air passage. The first air passage, the second air passage, and the third air passage communicate to form a gas channel. The positive pressure gas output from the positive pressure section 110 or the negative pressure gas output from the negative pressure section 120 can act on the vent 221 of the rolling element 220 through the gas channel, thereby achieving the rejection of defective electrode sheets. Furthermore, the rotating component 260 includes a base 261 and a rotating head 262 rotatably connected to the base 261. The base 261 is connected to the rolling component 220 and the connector 250, ensuring that the connector 250 does not rotate with the rolling component 220. This improves the connection stability between the connector 250 and the positive pressure section 110 and the negative pressure section 120, reducing the occurrence of pipe loosening, air leakage, and other malfunctions. Additionally, the rotating head 262 can be configured as a deep groove ball bearing. Utilizing the characteristics of deep groove ball bearings—capable of simultaneously withstanding radial and axial forces and having a low coefficient of friction—it ensures the flexibility and smoothness of the rolling component 220's rotation, reduces resistance and wear during rotation, extends the service life of the rotating component 260, and thus ensures the sealing performance and gas transmission efficiency of the entire gas passage. Of course, in actual design, the structure of the rotating head 262 can be designed according to specific needs.

[0034] Reference Figure 3 , Figure 5 In some embodiments, a rotating shaft 270 is provided at the end of the rolling element 220 away from the connector 250. The first driving element 210 is a motor, and the drive shaft of the motor is connected to the rotating shaft 270 through a synchronous belt assembly 280. This ensures that the driving torque of the motor is transmitted to the rolling element 220, so that the linear speed of the rolling element 220 is consistent with the speed of the vacuum belt conveying the electrode sheets. This avoids relative displacement of the electrode sheets during conveying or being adsorbed by the rolling element 220 due to speed deviation, ensuring the stability of qualified electrode sheets adhering to the vacuum belt and the accuracy of adsorbing defective electrode sheets. Of course, in actual design, the structure of the first driving element 210 can be designed according to actual needs.

[0035] Reference Figure 6 In some embodiments, the positive and negative pressure switching assembly 100 further includes an air source switching shaft 130 and a second driving member 140, with the air source switching shaft 130 connected to the driving end of the second driving member 140; the outer surface of the air source switching shaft 130 is divided into a first circumferential side and a second circumferential side along its axial direction, with a plurality of spaced positive pressure channels 131 provided on the first circumferential side and a plurality of spaced negative pressure channels 132 provided on the second circumferential side, and the positive pressure channels 131 and negative pressure channels 132 are staggered along the axial direction of the air source switching shaft 130. The staggered arrangement of the positive pressure channel 131 and negative pressure channel 132 can avoid cross-interference or cross-flow of air during the switching process between positive and negative pressure states, reducing electrode processing errors caused by air pressure mixing. At the same time, the second driving component 140 can achieve rapid state switching of the air source switching shaft 130, adapting to the production rhythm of high-speed electrode conveying, ensuring that the positive pressure bonding vacuum belt or negative pressure adsorption rolling component 220 is completed in a short time when the electrode passes through, further improving the working efficiency and reliability of the defective product rejection device, reducing interference to adjacent electrode sheets, and ensuring the accuracy of subsequent stacking.

[0036] Specifically, when the second driving member 140 drives the air source switching shaft 130 to rotate to the first preset position, the positive pressure channel 131 is connected to the positive pressure part 110, and the negative pressure channel 132 is not connected to the negative pressure part 120. The positive and negative pressure switching assembly 100 switches to the positive pressure state, and the positive pressure gas is blown out through the positive pressure channel 131, so as to blow the positive pressure gas out from the vent hole 221 of the rolling member 220, ensuring that the qualified electrode sheet adheres to the vacuum belt. When the second driving member 140 drives the air source switching shaft 130 to rotate to the second preset position, the positive and negative pressure switching assembly 100 switches to the negative pressure state, the negative pressure channel 132 is connected to the negative pressure part 120, and the positive pressure channel 131 is not connected to the positive pressure part 110. Negative pressure is generated in the negative pressure channel 132, so that the defective products on the vacuum belt are adsorbed on the rolling member 220 and removed by the rotation of the rolling member 220. It should be noted that the second driving component 140 driving the air source switching shaft 130 to rotate to the first preset position and the second preset position is existing technology, and this utility model has not made any improvements to this part, so its principle and process will not be described in detail.

[0037] Reference Figure 6 , Figure 7 In some embodiments, both the positive pressure channel 131 and the negative pressure channel 132 are arc-shaped. These arc-shaped channels can fit the cylindrical outer surface of the gas source switching shaft 130, ensuring the sealing and stability of the positive or negative pressure during transmission and reducing leakage or insufficient negative pressure. Furthermore, both the positive and negative pressure channels 131 and 132 have a circumferential angle of 180°, allowing the gas source switching shaft 130 to complete the switching between positive and negative pressure states with a 180° rotation. This makes the switching process more convenient and efficient, reducing switching delays.

[0038] In some embodiments, the second drive element 140 is configured as a servo motor, which is connected to the air source switching shaft 130 via a coupling. The servo motor can drive the air source switching shaft 130 to rotate to a first preset position or a second preset position, thereby controlling the air source switching shaft 130 to switch between positive and negative pressure states. This ensures accurate communication between the positive pressure channel 131 and the positive pressure section 110, and between the negative pressure channel 132 and the negative pressure section 120, thus achieving the rejection of defective electrode sheets. Of course, in actual implementation, the structure of the second drive element 140 can be designed according to actual needs.

[0039] Reference Figure 1 , Figure 6 , Figure 7In some embodiments, the positive pressure section 110 includes a positive pressure inlet 111 and a positive pressure outlet 112, both of which are connected to the positive pressure channel 131. The positive pressure inlet 111 is connected to a second positive pressure gas source assembly (not shown in the figure), and the positive pressure outlet 112 is connected to the rolling element 220. Specifically, the positive pressure outlet 112 is connected to the connector 250 through a first air guide pipe (not shown in the figure), so that the positive pressure gas provided by the second positive pressure gas source assembly can be sequentially transported to the rolling element 220 through the positive pressure inlet 111, the positive pressure channel 131, the positive pressure outlet 112, the connector 250, and the rotating element 260, and blown out from the vent hole 221 of the rolling element 220, ensuring that the positive pressure gas acting on the qualified electrode is stable, thereby allowing the qualified electrode to adhere to the vacuum belt.

[0040] Reference Figure 1 , Figure 6 , Figure 7 In some embodiments, the negative pressure section 120 includes a negative pressure inlet 121 and a negative pressure outlet 122, both of which are connected to the negative pressure channel 132. The negative pressure inlet 121 is connected to a negative pressure air source assembly (not shown in the figure), and the negative pressure outlet 122 is connected to the rolling element 220. Specifically, the negative pressure outlet 122 is connected to the connector 250 through a second air guide pipe (not shown in the figure). The negative pressure air source assembly provides a negative pressure force, enabling the negative pressure to form an adsorption force at the rolling element 220 through the negative pressure inlet 121, the negative pressure channel 132, the negative pressure outlet 122, the connector 250, and the rotating element 260, ensuring that the defective electrode sheets on the vacuum belt are adsorbed onto the rolling element 220.

[0041] Reference Figure 6 , Figure 7 In some embodiments, the positive and negative pressure switching assembly 100 further includes a housing 150, which is sleeved on the outside of the gas source switching shaft 130. Both the positive pressure section 110 and the negative pressure section 120 are connected to the housing 150. When the gas source switching shaft 130 rotates within the housing 150, a closed dynamic fit space is formed between the housing 150 and the gas source switching shaft 130. Simultaneously, the sealing ring 170 further enhances the airtightness of the positive pressure channel 131 and the negative pressure channel 132, preventing leakage of positive pressure gas or negative pressure to the outside during switching, ensuring stable positive pressure output and reliable negative pressure adsorption. Specifically, the gas source switching shaft 130 can rotate within the housing 150, allowing the positive pressure channel 131 to connect with the positive pressure section 110 or the negative pressure channel 132 to connect with the negative pressure section 120, thereby enabling the positive and negative pressure switching assembly 100 to switch between positive and negative pressure states.

[0042] Reference Figure 6 , Figure 7In some embodiments, each positive pressure outlet 112 and negative pressure outlet 122 is provided as one, and each positive pressure inlet 111 and negative pressure inlet 121 is provided as two. The two positive pressure inlets 111 are symmetrically arranged on both sides of the housing 150, and the two negative pressure inlets 121 are symmetrically arranged on both sides of the housing 150. The positive pressure inlets 111 and negative pressure inlets 121 located on the same side of the housing 150 are alternately arranged. Two symmetrical positive pressure inlets 111 simultaneously input positive pressure gas from both sides of the housing 150 into the positive pressure channel 131, making the air pressure distribution within the positive pressure channel 131 more uniform. This avoids localized excessively high or low air pressure caused by a single inlet, ensuring that the positive pressure gas is transmitted to the rolling element 220 via the positive pressure outlet 112 with stable and consistent pressure. This allows the positive pressure gas blown out of each vent 221 of the rolling element 220 to exert a balanced force, ensuring that qualified electrode sheets adhere more smoothly to the vacuum belt and reducing electrode sheet misalignment or wrinkling caused by uneven force. Furthermore, two symmetrical negative pressure inlets 121 provide negative pressure from both sides of the housing 150 into the negative pressure channel 132, making the negative pressure distribution within the negative pressure channel 132 more uniform. This avoids localized insufficient negative pressure caused by a single inlet, ensuring that the adsorption force of the rolling element 220 on defective electrode sheets remains consistent throughout, preventing defective electrode sheets from falling off due to insufficient localized adsorption force, and ensuring the reliability of the rejection process.

[0043] Reference Figure 6 , Figure 7 In some embodiments, along the axial direction of the gas source switching shaft 130, the gas source switching shaft 130 is provided with a plurality of spaced annular mounting grooves, and an annular mounting groove is provided between the positive pressure channel 131 and the adjacent negative pressure channel 132. Each annular mounting groove is provided with a mounting ring 160, and a sealing ring 170 is provided on the mounting ring 160. The sealing ring 170 is used to improve the airtightness of the positive pressure channel 131 and the negative pressure channel 132. The sealing ring 170 can block the gas flow between the positive pressure channel 131 and the negative pressure channel 132, and prevent the positive pressure gas from leaking into the negative pressure channel 132 under positive pressure or the negative pressure under negative pressure from being interfered with by the positive pressure channel 131. This ensures stable gas pressure output under positive pressure and reliable adsorption force under negative pressure, and reduces the problem of qualified products not adhering firmly to the vacuum belt or defective products failing to be adsorbed due to cross-ventilation. Furthermore, multiple spaced annular mounting grooves, in conjunction with the mounting ring 160 and the sealing ring 170, can provide zoned sealing for different positive pressure channels 131 and negative pressure channels 132, further improving overall airtightness. Additionally, the mounting ring 160 is configured as a back support ring; when the air source switching shaft 130 rotates, the mounting ring 160 rotates with it, while the sealing ring 170 remains stationary. The mounting ring 160 is connected to the air source switching shaft 130 via the back support ring, reducing friction and ensuring that the sealing ring 170 always fits tightly against the sealing surface, further preventing gas cross-flow between the positive pressure channel 131 and the negative pressure channel 132.

[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A defective electrode rejection device, characterized in that, include: A positive and negative pressure switching component, comprising a positive pressure section and a negative pressure section; The rejection assembly includes a first driving member and a rolling member. The rolling member is connected to the driving end of the first driving member and is tangential to the vacuum belt that transports the electrode sheet. Both the positive pressure section and the negative pressure section are connected to the rolling member. The rolling member is provided with multiple vent holes. When the electrode sheet is a qualified product, the positive pressure section outputs positive pressure gas, causing the positive pressure gas to be blown out from the vent holes, so that the electrode sheet adheres to the vacuum belt. When the electrode sheet is a defective product, the negative pressure section outputs negative pressure, causing the electrode sheet to be adsorbed onto the rolling member, thereby rejecting the electrode sheet.

2. The defective electrode rejection device according to claim 1, characterized in that, The rejection assembly also includes a scraper, which is disposed on the outside of the rolling element. The scraper includes an air blowing section. When the rolling element adsorbs the electrode and rotates to a preset position, the air blowing section outputs gas to separate the rolling element from the adsorbed electrode.

3. The defective electrode rejection device according to claim 2, characterized in that, The scraper also includes a sealing film that covers at least a portion of the rolling element.

4. The defective electrode rejection device according to claim 3, characterized in that, The rejection assembly also includes a mounting frame, the rolling element is disposed within the mounting frame, the air blowing part is connected to the mounting frame, and the air outlet of the air blowing part faces the side of the rolling element. The scraper also includes a first support portion and a second support portion, which are respectively disposed on opposite sides of the mounting bracket. The first support portion is connected to one end of the sealing film, and the second support portion is connected to the other end of the sealing film, so that the sealing film fits against the side of the rolling element.

5. The defective electrode rejection device according to claim 3, characterized in that, The rolling element is provided with a plurality of annular grooves in its circumferential direction. The annular grooves are provided corresponding to the air blowing part. An adsorption part is formed between two adjacent annular grooves. The adsorption part is provided corresponding to the sealing film. The adsorption part is provided with a plurality of air holes.

6. The defective electrode rejection device according to claim 1, characterized in that, The rejection assembly also includes a connector, which is connected to the rolling element via a rotating component, and both the positive pressure part and the negative pressure part are connected to the connector.

7. The defective electrode rejection device according to claim 1, characterized in that, The positive and negative pressure switching assembly also includes an air source switching shaft and a second driving component, wherein the air source switching shaft is connected to the driving end of the second driving component; The outer surface of the gas source switching shaft is divided into a first circumferential side and a second circumferential side along its axial direction. The first circumferential side is provided with a plurality of spaced positive pressure channels, and the second circumferential side is provided with a plurality of spaced negative pressure channels. The positive pressure channels and the negative pressure channels are staggered along the axial direction of the gas source switching shaft. When the second driving component drives the air source switching shaft to rotate to the first preset position, the positive pressure channel is connected to the positive pressure section; When the second driving component drives the air source switching shaft to rotate to the second preset position, the negative pressure channel is connected to the negative pressure section.

8. The defective electrode rejection device according to claim 7, characterized in that, The positive pressure section includes a positive pressure inlet and a positive pressure outlet. Both the positive pressure inlet and the positive pressure outlet are connected to the positive pressure channel. The positive pressure inlet is connected to the positive pressure air source assembly, and the positive pressure outlet is connected to the rolling element. The negative pressure section includes a negative pressure inlet and a negative pressure outlet, both of which are connected to the negative pressure channel. The negative pressure inlet is connected to the negative pressure air source assembly, and the negative pressure outlet is connected to the rolling element.

9. The defective electrode rejection device according to claim 8, characterized in that, There are two positive pressure air inlets and two negative pressure air inlets, with the two positive pressure air inlets and the two negative pressure air inlets arranged symmetrically.

10. The defective electrode rejection device according to claim 7, characterized in that, Along the axial direction of the air source switching shaft, the air source switching shaft is provided with a plurality of annular mounting grooves spaced apart, and the annular mounting groove is provided between the positive pressure channel and the adjacent negative pressure channel. Each annular mounting groove is provided with a mounting ring, and a sealing ring is provided on the mounting ring. The sealing ring is used to improve the airtightness of the positive pressure channel and the negative pressure channel.

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