Pole piece production device

Abstract

The utility model provides a pole piece production device which comprises a film forming assembly, a laminating roller set and a laser cutting assembly, and the film forming assembly is used for extruding powder to form a film layer; the laminating roller group is arranged at the downstream of the film forming assembly and comprises two rollers, and the two rollers can rotate relatively so as to extrude and laminate the extruded and formed film layer on the surface of the conductive carrier; and along the transmission path of the conductive carrier, the laser cutting assembly is arranged at the downstream of the conductive carrier, and the laser cutting assembly is used for enabling the film layer to form a gap perpendicular to the long edge of the conductive carrier, so that intermittent coating is realized, and the flexibility in the pole piece production process is improved.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to an electrode production apparatus. Background Technology

[0002] In the electrode manufacturing process, a film-forming assembly is typically used to extrude powder into a film, and then a bonding roller assembly is used to press and bond the extruded film to two opposite surfaces of the conductive carrier. However, this rolling method results in a continuous film on the conductive carrier, which cannot meet the requirements of intermittent coating, leading to a relatively simple electrode manufacturing process. 。 Utility Model Content

[0003] This application discloses an electrode production apparatus that can improve the flexibility of the electrode production process.

[0004] To achieve the above objectives, this application discloses an electrode production apparatus, comprising:

[0005] A film-forming assembly for extruding powder into a film layer;

[0006] A bonding roller assembly is disposed downstream of the film forming assembly. The bonding roller assembly includes two rollers with a gap between them for a conductive carrier to pass through. The two rollers are capable of rotating relative to each other to press and bond the extruded film layer onto the surface of the conductive carrier.

[0007] A laser cutting assembly is disposed downstream of the bonding roller assembly along the transport path of the conductive carrier. The laser cutting assembly is used to form a gap in the film layer perpendicular to the long side of the conductive carrier.

[0008] Optionally, the film-forming assembly includes a first film-forming element and a second film-forming element, wherein the first film-forming element is used to extrude powder into a first film layer, and the second film-forming element is used to extrude powder into a second film layer;

[0009] The bonding roller assembly is disposed between the first film-forming element and the second film-forming element to press and bond the first film layer and the second film layer onto two opposite surfaces of the conductive carrier, respectively.

[0010] The laser cutting assembly includes a first laser cutting component and a second laser cutting component. The first laser cutting component is used to form a gap in the first film layer that is perpendicular to the long side of the conductive carrier, and the second laser cutting component is used to form a gap in the second film layer that is perpendicular to the long side of the conductive carrier.

[0011] Optionally, the cutting widths of the first laser cutter and the second laser cutter are matched with the width of the conductive carrier, so as to divide the film attached to the conductive carrier along the width direction of the conductive carrier in the transmission path of the conductive carrier.

[0012] Optionally, both the first laser-cut component and the second laser-cut component comprise multiple components, and the multiple first laser-cut components and the multiple second laser-cut components are arranged along the width direction of the conductive carrier.

[0013] Optionally, the laser cutting assembly further includes a control module, which is electrically connected to the first laser cutting component and the second laser cutting component to control the first laser cutting component and the second laser cutting component to emit laser beams toward the conductive carrier at preset time intervals.

[0014] Optionally, the laser cutting assembly includes multiple sets, which are arranged at preset distance intervals along the transmission path of the conductive carrier.

[0015] Optionally, the electrode production apparatus further includes a cleaning component for cleaning up waste material generated after the laser cutting component has cut the electrode.

[0016] Optionally, the cleaning assembly includes a negative pressure cleaning component disposed near the laser cutting assembly, the negative pressure cleaning component being used to suck up and collect the waste material.

[0017] Optionally, the cleaning component includes an air blowing element disposed near the laser cutting component, the air blowing element being used to blow away the waste material to remove the waste material from the conductive carrier.

[0018] Optionally, the cleaning component includes an electrostatic adsorption element disposed below the laser cutting component along the transmission direction of the conductive carrier. The electrostatic adsorption element is used to adsorb the waste material adhering to the conductive carrier when it is transmitted to the electrostatic adsorption element.

[0019] Compared with the prior art, the beneficial effects of this application are as follows:

[0020] In the electrode production process, firstly, the film-forming component extrudes the powder into a film layer. During the transport process, the conductive carrier enters the gap between two rollers. The two rollers rotate relative to each other, and due to the extrusion action of the rollers, the film layer is tightly bonded to the surface of the conductive carrier, forming an adhesive body between the film layer and the conductive carrier. After bonding, the conductive carrier continues to move along the transport path to the laser cutting component. The first laser cutting component, according to the set length or position, makes the film layer form a gap perpendicular to the long side of the conductive carrier, so as to realize intermittent coating, which improves the flexibility of the electrode production process and realizes a continuous automated production process from film formation, bonding to cutting, reducing manual intervention, improving production efficiency, and reducing production costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of an electrode production apparatus provided in an embodiment of this application;

[0023] Figure 2 This is a top view of the electrode production apparatus provided in the embodiments of this application;

[0024] Figure 3 This is a side view of the bonding roller assembly and laser cutting assembly provided in the embodiments of this application;

[0025] Figure 4 This is a schematic diagram showing the completed cutting process according to an embodiment of this application;

[0026] Figure 5 yes Figure 4 The main view;

[0027] Figure 6 This is a schematic diagram of an electrode production apparatus according to an embodiment of this application, which has multiple sets of cutting components.

[0028] Explanation of main figure symbols

[0029] 1-Electrode production equipment;

[0030] 10-Conductive carrier;

[0031] 21 - First film layer; 22 - Second film layer;

[0032] 100 - Film-forming component; 110 - First film-forming element; 120 - Second film-forming element;

[0033] 200 - Lamination roller assembly; 210 - Roller;

[0034] 300 - Laser cutting assembly; 310 - First laser-cut part; 320 - Second laser-cut part. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0037] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0038] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0039] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components whose specific types and structures may be the same or different, and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0040] As mentioned in the background section, in the prior art, during the electrode production process, a film-forming assembly is typically used to extrude powder into a film, and then a bonding roller assembly is used to press and bond the extruded film to two opposite surfaces of the conductive carrier. However, this rolling method results in continuous films on the conductive carrier, which cannot meet the requirements of gap coating, leading to a relatively simple production method. 。

[0041] To address the aforementioned issues, this application provides an electrode production apparatus with a laser cutting component, which can divide the film layer during the conductive carrier transport process to achieve intermittent coating and improve the flexibility of the electrode production process.

[0042] The technical solution of this application will be further described below with reference to specific embodiments and accompanying drawings.

[0043] See Figures 1 to 4 This embodiment provides an electrode production apparatus 1, which includes a film forming assembly 100, a bonding roller assembly 200, and a laser cutting assembly 300. The bonding roller assembly 200 is located downstream of the film forming assembly 100 and includes two rollers 210 with a gap between them for a conductive carrier 10 to pass through. The two rollers 210 can rotate relative to each other to press and bond the extruded film layer onto the surface of the conductive carrier 10. Along the transport path of the conductive carrier 10, the laser cutting assembly 300 is located downstream of the bonding roller assembly 200 and is used to form a gap in the film layer perpendicular to the long side of the conductive carrier 10.

[0044] The transmission direction of the conductive carrier 10 is as follows: Figure 3 The direction indicated by the middle arrow Y.

[0045] In the electrode production process, firstly, the film-forming component 100 extrudes the powder into a film layer 21. During the transport process, the conductive carrier 10 enters the gap between two rollers 210. The two rollers 210 rotate relative to each other. Due to the extrusion action of the rollers 210, the film layer is tightly bonded to the surface of the conductive carrier 10, forming a bonded body between the film layer and the conductive carrier 10. After bonding, the conductive carrier 10 continues to move along the transport path and reaches the position of the laser cutting component 300. The first laser cutting component 310, according to the set length or position, makes the film layer form a gap perpendicular to the long side of the conductive carrier 10 to achieve intermittent coating, which improves the flexibility of the electrode production process and realizes a continuous automated production process from film formation, bonding to cutting, reducing manual intervention, improving production efficiency, and reducing production costs.

[0046] It should be noted that the two rollers 210 rotate relative to each other, which may allow the film layer to be adhered to only one surface of the conductive carrier 10, or the film layer to be adhered to two opposite surfaces of the conductive carrier 10, and no limitation is made here.

[0047] In one possible embodiment, see Figures 1 to 4 The film-forming assembly 100 includes a first film-forming element 110 and a second film-forming element 120. The first film-forming element 110 is used to extrude powder into a first film layer 21, and the second film-forming element 120 is used to extrude powder into a second film layer 22. The bonding roller group 200 is disposed between the first film-forming element 110 and the second film-forming element 120 to extrude and bond the first film layer 21 and the second film layer 22 onto two opposite surfaces of the conductive carrier 10, respectively. The laser cutting assembly 300 includes a first laser cutting element 310 and a second laser cutting element 320. The first laser cutting element 310 is used to form a gap perpendicular to the long side of the conductive carrier 10 on the first film layer 21, and the second laser cutting element 320 is used to form a gap perpendicular to the long side of the conductive carrier 10 on the second film layer 22.

[0048] Thus, the first film-forming component 110 extrudes the powder into a first film layer 21, while the second film-forming component 120 also extrudes the powder into a second film layer 22. The bonding roller group 200 tightly bonds the first film layer 21 and the second film layer 22 onto the two opposite surfaces of the conductive carrier 10, forming a bonded body between the film layer and the conductive carrier 10. After bonding, the conductive carrier 10 continues to move along the transport path and reaches the position of the laser cutting component 300. The first laser cutting component 310, according to a set length or position, makes the first film layer 21 form a gap perpendicular to the long side of the conductive carrier 10. The second laser cutting component 320 performs the same operation on the second film layer 22, thereby dividing the first film layer 21 and the second film layer 22 during the transport of the conductive carrier 10 to achieve intermittent coating, improve the flexibility of the electrode production process, and realize a continuous automated production process from film formation, bonding to cutting, reducing manual intervention, improving production efficiency, and reducing production costs.

[0049] In one possible embodiment, the cutting widths of the first laser cutter 310 and the second laser cutter 320 are matched with the width of the conductive carrier 10, so as to divide the film attached to the conductive carrier 10 along the width direction of the conductive carrier 10 in the transmission path of the conductive carrier 10.

[0050] The matching of the cutting width of the first laser cutting element 310 and the second laser cutting element 320 with the width of the conductive carrier 10 should be understood as follows: when the first laser cutting element 310 and the second laser cutting element 320 are performing cutting operations, the effective range of their laser cutting in the width direction is consistent with or adapted to the width of the conductive carrier 10. In other words, the width covered by the laser cutting light is just enough to extend from one edge of the conductive carrier 10 to the other edge, thereby completely separating the film adhered to the conductive carrier 10 in the width direction. The width direction of the conductive carrier 10 is... Figure 5 The direction indicated by the middle arrow X.

[0051] When the conductive carrier 10, carrying the attached film layer, passes through the laser cutting assembly 300, the first laser cutting element 310 and the second laser cutting element 320 respectively emit laser beams from both sides of the conductive carrier 10 in a direction perpendicular to the surface of the conductive carrier, cutting the corresponding first film layer 21 and second film layer 22. Since the cutting width matches the width of the conductive carrier 10, it can ensure that the first film layer 21 and the second film layer 22 are completely cut off, so that the film layer forms an independent electrode portion on the conductive carrier 10.

[0052] In one possible embodiment, the first laser cutting element 310 and the second laser cutting element 320 each include a plurality of components, and the plurality of first laser cutting elements 310 and the plurality of second laser cutting elements 320 are arranged along the width direction of the conductive carrier 10.

[0053] When the conductive carrier 10 with the adhesive film layer is transported to the laser cutting assembly 300, multiple first laser cutting elements 310 and multiple second laser cutting elements 320 are arranged sequentially along the width direction of the conductive carrier 10, ready to cut the film layer. The multiple first laser cutting elements 310 start simultaneously and move rapidly to cut the first film layer 21, which can shorten the cutting time and reduce the spots formed by laser cutting. Similarly, the multiple second laser cutting elements 320 also perform the same coordinated cutting operation on the second film layer 22 at the same time, cutting the second film layer 22 from the other side of the conductive carrier 10.

[0054] Of course, there can be only one first laser cutting element 310 and one second laser cutting element 320. The first film layer 21 and the second film layer 22 can be cut by rapidly moving one first laser cutting element 310 and one second laser cutting element 320 in the width direction of the conductive carrier.

[0055] In one possible embodiment, the laser cutting assembly 300 further includes a control module electrically connected to the first laser cutting element 310 and the second laser cutting element 320 to control the first laser cutting element 310 and the second laser cutting element 320 to emit laser beams toward the conductive carrier 10 at preset time intervals.

[0056] By emitting laser beams at preset time intervals, the control module can automatically and precisely control the working time and start / stop times of each laser-cut component, thereby achieving high-precision control over the electrode cutting length. For example, by setting appropriate time intervals and emission counts based on the required electrode length, the film layer can be accurately cut into electrodes of predetermined lengths. Furthermore, because each cutting cycle is precisely controlled by the control module according to preset time intervals, the dimensions of each produced electrode are more consistent along its length. This high degree of consistency is crucial for battery performance and safety, ensuring good matching between the electrodes within the battery and improving the overall quality and stability of the battery.

[0057] In one possible embodiment, see Figure 6 The laser cutting assembly 300 includes multiple sets, which are arranged at preset distance intervals along the transmission path of the conductive carrier 10.

[0058] The preset distance is matched with the length of the electrode.

[0059] When the conductive carrier 10 with the bonded film layer enters the working area of ​​the first laser cutting assembly 300, the first laser cutter 310 and the second laser cutter 320 in the laser cutting assembly 300, under the control of the control module, emit laser beams toward the conductive carrier 10 at preset time intervals to cut the first film layer 21 and the second film layer 22 respectively, completing the first cutting operation at that position. The film layer is cut into electrode units of a specific length in the transmission direction of the conductive carrier 10. The conductive carrier 10, after being cut by the first laser cutting assembly 300, continues to move along the transmission direction. As the path advances, when it reaches the position of the second set of laser cutting components 300, the second set of laser cutting components 300 repeats the above cutting action to cut the film layer on the conductive carrier 10 again to ensure the cutting effect. Each subsequent set of laser cutting components 300 works in the same way in sequence. During the transmission of the conductive carrier 10, the film layer is continuously cut at intervals to ensure the cutting effect. Moreover, multiple sets of cutting components exist simultaneously and work in sequence, which not only achieves a certain degree of parallel cutting, but also continuously processes the electrode sheet in a relay manner, effectively improving production efficiency.

[0060] Of course, the cutting method of multiple laser cutting components 300 is not limited to the above form. It can also be that the conductive carrier moves a long distance and multiple laser cutting components 300 simultaneously cut the film layer of the conductive carrier 10. After the conductive carrier 10 has moved a long distance on the transmission path, multiple laser cutting components 300 are started at the same time so that multiple laser cutting components 300 act on the film layer on the conductive carrier 10 at the same time, which can complete the cutting of more electrodes in a shorter time, thereby speeding up the cutting efficiency.

[0061] In one possible embodiment, the electrode production apparatus 1 further includes a cleaning component for cleaning up waste material generated after cutting by the laser cutting component 300.

[0062] During electrode production, the laser cutting component 300 cuts off the unwanted film layers from the conductive carrier 10. These cut-off film layers form waste. This waste film is usually thin and sheet-like. If the cut-off film waste remains on the electrode, especially between the positive and negative electrodes, it may cause a short circuit between the positive and negative electrodes. Moreover, the film waste is prone to accumulate in the gaps, pipes, and transmission components of the equipment, causing blockages and hindering the normal operation of the equipment. For example, during electrode transfer, the waste may get stuck between the transfer rollers or guide rails, causing poor transfer or even jamming. By setting up a cleaning component to clean up this film waste in a timely manner, the various adverse effects on product quality mentioned above can be effectively avoided, ensuring the purity and performance consistency of the electrode, thereby improving the quality and reliability of the battery. It can also prevent equipment blockage and wear, reduce the probability of equipment failure, and extend the service life of the equipment.

[0063] In one possible embodiment, the cleaning component includes a negative pressure cleaning element disposed near the laser cutting component 300, the negative pressure cleaning element being used to suck up and collect waste.

[0064] During the operation of the electrode production unit 1, when the laser cutting component 300 begins cutting the film layer and generating waste, the negative pressure cleaning component is activated simultaneously. Through the operation of internal fans, vacuum pumps, and other equipment, it creates a negative pressure environment near its suction port that is lower than the external atmospheric pressure, thereby generating suction to promptly capture the freshly cut film waste. This ensures that the waste is within the range of negative pressure suction as soon as it is generated. The generated negative pressure suction acts on the film waste produced during cutting, drawing these thin, sheet-like waste materials towards the suction port, minimizing the accumulation of waste in and around the cutting area. Compared to manual or non-immediate cleaning methods, this significantly improves the timeliness of cleaning, ensuring that the cutting work can continue stably without interruption or impact on the cutting effect due to waste accumulation.

[0065] In one possible embodiment, the cleaning component includes an air blowing element disposed near the laser cutting component 300, which is used to blow away waste material to remove it from the conductive carrier 10.

[0066] During the electrode production process, after the laser cutting assembly 300 completes the cutting operation of the film layer, the cut waste will remain on or near the conductive carrier 10. At this time, the air blowing component near the laser cutting assembly 300 starts to work. It obtains gas with a certain pressure through the connected air source (such as a compressed air tank) and acts directly on the surface of the conductive carrier 10 with the waste attached and the surrounding area. Due to the impact and entrainment effect of the airflow, the film waste originally attached to the conductive carrier 10, whether it is sheet-like or fragmented, will gradually detach from the conductive carrier 10 under the push of the airflow, so as to clean the waste off in time.

[0067] In one possible embodiment, the cleaning component includes an electrostatic adsorption element disposed below the laser cutting component 300 along the transport direction of the conductive carrier 10. The electrostatic adsorption element is used to adsorb waste material adhering to the conductive carrier 10 when it is transported to the electrostatic adsorption element.

[0068] When the electrode production device 1 is running, the electrostatic adsorption component generates static electricity through its internal electrostatic generator (such as an electrostatic generator), causing its surface to carry a static charge of a specific polarity. This creates an electrostatic field environment capable of adsorbing waste. The electrostatic adsorption component is positioned below the laser cutting assembly 300 along the transmission direction of the conductive carrier 10, at a location along the path that the waste will inevitably pass through when it is transmitted with the conductive carrier 10. It is ready to adsorb the waste that is being transmitted. The electrostatic adsorption component will continuously maintain the effect of the electrostatic field. As long as waste is transmitted with the conductive carrier 10, it will continuously adsorb it to accurately capture fine and difficult-to-remove waste, further improving the thoroughness of waste cleaning and minimizing the amount of waste residue on the conductive carrier 10 and in the entire production environment, thus ensuring the cleanliness of the production area.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the cutting device and electrode coating equipment of this application, and are not intended to limit them. Although the cutting device and electrode coating equipment of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electrode production apparatus (1), characterized in that, include: A film-forming assembly (100) is used to extrude powder into a film layer; A bonding roller assembly (200) is disposed downstream of the film forming assembly (100). The bonding roller assembly (200) includes two rollers (210) with a gap between them for the conductive carrier (10) to pass through. The two rollers (210) are rotatable relative to each other to press and bond the extruded film layer to the surface of the conductive carrier (10). A laser cutting assembly (300) is disposed downstream of the bonding roller assembly (200) along the transmission path of the conductive carrier (10). The laser cutting assembly (300) is used to form a gap in the film layer perpendicular to the long side of the conductive carrier (10).

2. The electrode production apparatus (1) according to claim 1, characterized in that, The film-forming assembly (100) includes a first film-forming component (110) and a second film-forming component (120). The first film-forming component (110) is used to extrude powder into a first film layer (21), and the second film-forming component (120) is used to extrude powder into a second film layer (22). The bonding roller assembly (200) is disposed between the first film-forming member (110) and the second film-forming member (120) to press and bond the first film layer (21) and the second film layer (22) onto two opposite surfaces of the conductive carrier (10), respectively. The laser cutting assembly (300) includes a first laser cutting element (310) and a second laser cutting element (320). The first laser cutting element (310) is used to form a gap in the first film layer (21) perpendicular to the long side of the conductive carrier (10). The second laser cutting element (320) is used to form a gap in the second film layer (22) perpendicular to the long side of the conductive carrier (10).

3. The electrode production apparatus (1) according to claim 2, characterized in that, The cutting widths of the first laser cutting element (310) and the second laser cutting element (320) are matched with the width of the conductive carrier (10) to divide the film attached to the conductive carrier (10) along the width direction of the conductive carrier (10) on the transmission path of the conductive carrier (10).

4. The electrode production apparatus (1) according to claim 2, characterized in that, The first laser-cut component (310) and the second laser-cut component (320) each include multiple components, and the multiple first laser-cut components (310) and the multiple second laser-cut components (320) are arranged along the width direction of the conductive carrier (10).

5. The electrode production apparatus (1) according to claim 3, characterized in that, The laser cutting assembly (300) further includes a control module, which is electrically connected to the first laser cutting component (310) and the second laser cutting component (320) to control the first laser cutting component (310) and the second laser cutting component (320) to emit laser beams toward the conductive carrier (10) at preset time intervals.

6. The electrode production apparatus (1) according to claim 4, characterized in that, The laser cutting assembly (300) includes multiple sets, and the multiple sets of laser cutting assemblies (300) are arranged at preset distance intervals along the transmission path of the conductive carrier (10).

7. The electrode production apparatus (1) according to claim 1, characterized in that, The electrode production apparatus (1) further includes a cleaning component, which is used to clean up the waste material formed after the laser cutting component (300) cuts.

8. The electrode production apparatus (1) according to claim 7, characterized in that, The cleaning assembly includes a negative pressure cleaning component disposed near the laser cutting assembly (300), the negative pressure cleaning component being used to suck up and collect the waste material.

9. The electrode production apparatus (1) according to claim 7, characterized in that, The cleaning component includes an air blowing element disposed near the laser cutting component (300) for blowing away the waste material to remove it from the conductive carrier (10).

10. The electrode production apparatus (1) according to claim 7, characterized in that, The cleaning assembly includes an electrostatic adsorption element disposed below the laser cutting assembly (300) along the transmission direction of the conductive carrier (10). The electrostatic adsorption element is used to adsorb the waste material adhering to the conductive carrier (10) when it is transmitted to the electrostatic adsorption element.

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