Plasma treatment device for electrode sheets, and electrode sheet processing apparatus

Abstract

A plasma treatment device for electrode sheets, and an electrode sheet processing apparatus. The plasma treatment device for electrode sheets comprises a housing, an unwinding mechanism, a winding mechanism, at least one adjustment roller, and at least one plasma generator. The plasma generator comprises a nozzle, and the nozzle is used for performing surface treatment on an electrode sheet laid on the adjustment roller. In the technical solution of the embodiments of the present application, vibration of electrode sheets can be reduced, so that the surface treatment of electrode sheets by plasma is more uniform, thereby improving the surface treatment effect on electrode sheets, and making the surface quality of electrode sheets meet requirements.

Description

Electrode plasma treatment equipment and electrode processing equipment

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202510011923.5, filed on January 3, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery manufacturing technology, specifically to an electrode plasma treatment device and electrode processing equipment. Background Technology

[0004] In the plasma processing device of the related technology, the electrode sheet is prone to shaking during the transmission process, which leads to uneven surface treatment of the electrode sheet by the plasma processing device, making it impossible to better meet the surface quality requirements of the electrode sheet. Summary of the Invention

[0005] In view of the above problems, this application provides an electrode plasma treatment apparatus and an electrode processing equipment, which can reduce electrode vibration and improve the surface treatment effect of the electrode, thereby improving the performance of the battery.

[0006] In a first aspect, this application provides an electrode plasma treatment apparatus, comprising: a housing, an unwinding mechanism, a winding mechanism, at least one adjusting roller, and at least one plasma generator; the unwinding mechanism is disposed within the housing for unwinding the electrode; the winding mechanism is disposed within the housing for winding the electrode; at least one adjusting roller is arranged between the unwinding mechanism and the winding mechanism for transporting the electrode; at least one plasma generator is disposed within the housing, the plasma generator including a nozzle for surface treatment of the electrode laid on the adjusting roller.

[0007] In the technical solution of this application embodiment, by setting at least one adjusting roller and at least one plasma generator in the unwinding mechanism and the winding mechanism, when the nozzle of the plasma generator sprays plasma onto the surface of the electrode, the adjusting roller can support the sprayed surface of the electrode, reduce electrode vibration, and make the plasma surface treatment of the electrode more uniform, thereby improving the surface treatment effect of the plasma generator on the electrode, so that the surface quality of the electrode meets the requirements, and thus the battery cell has better cycle stability and higher energy density. In addition, the adjusting roller can also support and tension the electrode, so that the electrode can be stably transported.

[0008] In some embodiments, the nozzle has a mounting surface opposite to the adjusting roller, the mounting surface being provided with air jet holes, and the mounting surface being an arc surface corresponding to the surface shape of the corresponding adjusting roller. In the above technical solution, by setting the mounting surface as an arc surface corresponding to the surface shape of the corresponding adjusting roller, multiple air jet holes can spray plasma relatively uniformly onto the electrode sheet laid on the adjusting roller, thereby improving the surface treatment effect of the electrode sheet.

[0009] In some embodiments, the distance between the surface of the adjusting roller and the corresponding mounting surface is greater than or equal to 1 mm. In the above technical solution, by limiting the distance between the surface of the adjusting roller and the corresponding mounting surface to meet the above range, the risk of the nozzle scratching or damaging the electrode sheet can be reduced, further improving the surface quality of the electrode sheet to meet the requirements.

[0010] In some embodiments, the surface of the adjusting roller is equidistant from the corresponding mounting surface. In the above technical solution, by equidistantly setting the surface of the adjusting roller to the corresponding mounting surface, the plasma ejected from multiple jet holes can adhere more evenly to the electrode surface on the corresponding adjusting roller, resulting in more uniform plasma treatment of the electrode surface and thus ensuring the surface quality of the electrode meets requirements.

[0011] In some embodiments, the plasma generator further includes a protective cover defining a chamber with an opening facing the regulating roller, and the nozzle is disposed within the chamber; wherein the protective cover has an exhaust port communicating with the chamber, and the electrode plasma treatment device further includes an exhaust pipe communicating with the exhaust port. In the above technical solution, by providing a protective cover, the nozzle can be protected, improving its reliability; furthermore, residual gas can be collected, facilitating its discharge from the housing and reducing the escape of residual gas into the space where the electrode plasma treatment device is located, ensuring that the air quality in the space where the electrode plasma treatment device is located meets the requirements.

[0012] In some embodiments, the electrode plasma treatment device further includes a telescopic tube, one end of which is connected to the exhaust port and the other end of which is connected to the exhaust pipe, thereby connecting the chamber and the exhaust pipe. In the above technical solution, by providing the telescopic tube, on the one hand, the plasma generator can be adaptively adjusted in position according to other structures within the chamber without affecting the connection between the plasma generator and the exhaust pipe; on the other hand, it can reduce the pulling on the exhaust pipe when the plasma generator shakes or moves, which is beneficial to improving the reliability of the electrode plasma treatment device.

[0013] In some embodiments, a reaction chamber is defined within the nozzle, and the reaction chamber communicates with an air jet hole on the nozzle; the plasma generator further includes at least one gas pipe connector, one end of which is connected to a gas source and the other end is connected to the nozzle to supply gas into the reaction chamber. By providing the gas pipe connector, it is convenient to introduce gas from the gas source into the reaction chamber, so that the plasma generator can excite the gas in the reaction chamber to generate plasma, thereby allowing the plasma to be ejected from the nozzle and used to treat the surface of the electrode.

[0014] In some embodiments, the protective cover has a first through hole, and a sealing ring is provided inside the protective cover surrounding the first through hole. One end of the sealing ring is connected to the protective cover, and the other end abuts against the nozzle. The air pipe connector passes through the first through hole and is located inside the sealing ring to connect to the nozzle. The first through hole can provide clearance for the air pipe connector, allowing the air pipe connector to be connected to the nozzle. Since one end of the sealing ring is connected to the protective cover and the other end abuts against the nozzle, the sealing ring can seal the chamber defined by the protective cover, reducing gas leakage within the chamber.

[0015] In some embodiments, the nozzle is provided with a high-voltage wire connector, one end of which extends into the reaction chamber. The protective cover has a second through-hole for avoiding the high-voltage wire connector. The second through-hole allows the high-voltage wire connector to be connected to the nozzle. The high-voltage wire connector is connected to a power system and can provide a high-frequency electric field, which excites the gas introduced into the reaction chamber to generate plasma, thereby allowing the plasma to be used to treat the electrode surface.

[0016] In some embodiments, a reaction chamber is defined within the nozzle, and a flow channel is defined within the wall of the nozzle, the flow channel surrounding the reaction chamber. The nozzle is provided with an inlet and an outlet, both of which communicate with the flow channel. This configuration allows coolant to be introduced into the nozzle wall for heat exchange, thereby reducing the nozzle temperature. This enables the nozzle to spray low-temperature plasma onto the electrodes on the corresponding regulating roller, thus reducing damage to the electrode surface and facilitating precise control.

[0017] In some embodiments, the electrode plasma treatment apparatus further includes a mounting frame fixed within the housing, and the plasma generator movably mounted on the mounting frame so that the position of the plasma generator relative to the corresponding adjusting roller is adjustable. In the above technical solution, by movably mounting the plasma generator on the mounting frame, the position of the plasma generator relative to the corresponding adjusting roller can be adjusted as needed. This not only allows the plasma generator to perform surface treatment on electrodes of different widths, but also ensures that the distance between the plasma generator nozzle and the corresponding adjusting roller meets the requirements, thereby improving the surface treatment effect of the plasma generator on the electrode.

[0018] In some embodiments, the adjusting roller extends axially along a first horizontal direction, and the plasma generator and the corresponding adjusting roller are disposed opposite each other in a second horizontal direction, the second horizontal direction being perpendicular to the first horizontal direction. The mounting frame includes a rotatable adjusting member and a slider movable along the second horizontal direction. The slider is fixedly connected to the plasma generator, and the adjusting member rotatably engages with the slider to convert the rotational motion of the adjusting member into the movement motion of the slider, thereby driving the plasma generator to move along the second horizontal direction. In the above technical solution, by providing an adjusting member and a slider on the mounting frame, the slider can be driven to move by rotating the adjusting member, thereby using the slider to drive the plasma generator to move relative to the mounting frame along the second horizontal direction, thus adjusting the distance between the plasma generator and the corresponding adjusting roller.

[0019] In some embodiments, the mounting bracket is provided with a fixing member movable along the first horizontal direction, and the slider is mounted on the fixing member to move along the first horizontal direction under the drive of the fixing member. In the above technical solution, by setting the fixing member, the plasma generator can be driven to move along the first horizontal direction, so that the plasma generator can perform surface treatment on electrodes of different widths, making it more adaptable.

[0020] In some embodiments, the number of adjusting rollers is at least two, including a first adjusting roller and a second adjusting roller; the number of plasma generators is at least two, at least one of the plasma generators having a nozzle used to perform surface treatment on one side surface of the electrode sheet laid on the first adjusting roller, and at least one other plasma generator having a nozzle used to perform surface treatment on the other side surface of the electrode sheet laid on the second adjusting roller. In the above technical solution, the first adjusting roller and the second adjusting roller can support the sprayed surface corresponding to the electrode sheet, reduce electrode sheet vibration, and make the plasma treatment of both sides of the electrode sheet more uniform, thereby improving the treatment effect of at least two plasma generators on both sides of the electrode sheet, ensuring that the surface quality of both sides of the electrode sheet meets the requirements, and thus enabling the battery cell to have better cycle stability and higher energy density. Furthermore, the first adjusting roller and the second adjusting roller can also support and tension the electrode sheet, enabling stable transmission of the electrode sheet.

[0021] In some embodiments, the nozzle has a mounting surface opposite to the corresponding adjusting roller, the mounting surface having air jet holes, and the mounting surface being an arc surface corresponding to the surface shape of the corresponding adjusting roller; wherein, the distance between the surface of the first adjusting roller and the mounting surface of the corresponding nozzle is L1, and the distance between the surface of the second adjusting roller and the mounting surface of the corresponding nozzle is L2, where L2 is equal to L1. This arrangement makes the two opposing surfaces of the electrode sheet more uniformly treated, further improving the surface quality of the electrode sheet.

[0022] In some embodiments, the nozzle has a mounting surface opposite to the corresponding adjusting roller, the mounting surface having air jet holes, and the mounting surface being an arc surface corresponding to the surface shape of the corresponding adjusting roller; the axial directions of the first adjusting roller and the second adjusting roller both extend along a first horizontal direction, and at least two nozzles are arranged in a second horizontal direction, the second horizontal direction being perpendicular to the first horizontal direction, and the mounting surfaces of the at least two nozzles are respectively formed as concave arc surfaces that are bent in opposite directions in the second horizontal direction. In the above technical solution, by forming the mounting surfaces of the two nozzles as concave arc surfaces that are bent in opposite directions in the second horizontal direction, the two nozzles are symmetrically arranged in the vertical direction perpendicular to the first and second horizontal directions. This reduces the influence of gravity on the plasma ejected by the nozzles, making the treatment effect of the two nozzles on the two oppositely arranged side surfaces of the electrode as consistent as possible, further improving the surface quality of the electrode.

[0023] In some embodiments, the axial direction of both the first adjusting roller and the second adjusting roller extends along a first horizontal direction, and the first adjusting roller and the second adjusting roller are arranged opposite each other in the vertical direction. In the above technical solution, by arranging the first adjusting roller and the second adjusting roller opposite each other in the vertical direction, the size of the electrode plasma treatment device in the second horizontal direction can be reduced, thereby reducing the space occupied by the electrode plasma treatment device in the second horizontal direction.

[0024] In some embodiments, the distance between the first adjusting roller and the second adjusting roller in the vertical direction is 25cm-150cm. In the above technical solution, by limiting the distance M1 between the first adjusting roller and the second adjusting roller in the vertical direction to meet the above range, it is beneficial to the arrangement of the plasma generator and reduce interference between structural components. Furthermore, it can reduce the space occupied by the electrode plasma processing device in the vertical direction.

[0025] In some embodiments, the axial directions of both the first adjusting roller and the second adjusting roller extend along a first horizontal direction, and the first adjusting roller and the second adjusting roller are arranged opposite each other in a second horizontal direction, the second horizontal direction being perpendicular to the first horizontal direction. In the above technical solution, by arranging the first adjusting roller and the second adjusting roller opposite each other in the second horizontal direction, the vertical dimensions of the electrode plasma treatment device can be reduced, thereby reducing the space occupied by the electrode plasma treatment device in the vertical direction.

[0026] In some embodiments, the distance between the first adjusting roller and the second adjusting roller in the second horizontal direction is 50cm-200cm. In the above technical solution, by limiting the distance M2 between the first adjusting roller and the second adjusting roller in the second horizontal direction to meet the above range, it is beneficial to the arrangement of the plasma generator and reduce interference between structural components. Furthermore, it can reduce the space occupied by the electrode plasma processing device in the second horizontal direction and improve the stability of electrode transportation.

[0027] In some embodiments, the axial directions of both the first adjusting roller and the second adjusting roller extend along a first horizontal direction, and the first adjusting roller and the second adjusting roller are arranged in a second horizontal direction and a vertical direction, wherein the second horizontal direction is perpendicular to the first horizontal direction. In the above technical solution, by arranging the first adjusting roller and the second adjusting roller in the second horizontal direction and the vertical direction, the size of the electrode plasma treatment device in the second horizontal direction and the vertical direction can be reduced, thereby reducing the space occupied by the electrode plasma treatment device in the second horizontal direction and the vertical direction.

[0028] In some embodiments, the distance between the first adjusting roller and the second adjusting roller in the extension direction of their center line is 60cm-250cm. In the above technical solution, by limiting the distance M3 between the first adjusting roller and the second adjusting roller in the extension direction of their center line to meet the above range, it is beneficial to the arrangement of the plasma generator and reduce interference between structural components. Furthermore, it can reduce the space occupied by the electrode plasma processing device and improve the stability of electrode transportation.

[0029] Secondly, this application provides an electrode processing apparatus, which includes the electrode plasma treatment device described in the above embodiments.

[0030] In the technical solution of this application embodiment, by using the above-mentioned electrode plasma treatment device, the surface quality of the electrode can meet the requirements, thereby enabling the battery cell to have better cycle stability and higher energy density.

[0031] In some embodiments, the electrode processing equipment includes an electrode cold press or an electrode die-cutting machine.

[0032] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0034] Figure 1 is a schematic diagram of the structure of an electrode plasma treatment apparatus according to some embodiments of this application;

[0035] Figure 2 is a schematic diagram of the plasma generator of the electrode plasma treatment device shown in Figure 1;

[0036] Figure 3 is a rear view of the plasma generator shown in Figure 2;

[0037] Figure 4 is a cross-sectional view of the structure along line AA in Figure 3;

[0038] Figure 5 is a cross-sectional view of the structure along line BB in Figure 3;

[0039] Figure 6 is an enlarged view of part C shown in Figure 5;

[0040] Figure 7 is a schematic diagram of the plasma generator shown in Figure 2 from another perspective;

[0041] Figure 8 is a partial structural schematic diagram of an electrode plasma processing apparatus according to some other embodiments of this application;

[0042] Figure 9 is a partial structural schematic diagram of an electrode plasma processing apparatus according to some embodiments of this application;

[0043] Figure 10 is a partial structural schematic diagram of an electrode plasma processing apparatus according to some embodiments of this application.

[0044] The reference numerals in the detailed embodiments are as follows:

[0045] Electrode plasma treatment device 100,

[0046] Box body 10, unwinding mechanism 20, winding mechanism 30.

[0047] Adjusting roller 40, first adjusting roller 41, second adjusting roller 42

[0048] Plasma generator 50, first plasma generator 501, second plasma generator 502.

[0049] Nozzle 51, mounting surface 511, jet nozzle 512, reaction chamber 513, water inlet 514, water outlet 515.

[0050] Protective cover 52, chamber 520, air extraction port 521, air pipe connector 522, first through hole 523, sealing ring 524, high-voltage wire connector 525, second through hole 526, connecting bracket 527.

[0051] Fixture 531, slider 532, adjusting component 533, guide rod 534.

[0052] Air extraction pipe 60, telescopic pipe 70, first telescopic pipe 71, second telescopic pipe 72.

[0053] Electrode 800. Embodiments of the present invention

[0054] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0056] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0057] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0058] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0059] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0060] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to 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 the embodiments of this application.

[0061] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0062] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0063] The manufacturing process of a battery cell includes at least the feeding, mixing, coating, drying, cold pressing, electrode die-cutting, and winding of raw materials, the shaping, matching, casing, welding, baking, and electrolyte injection of the bare cells for battery assembly, and the final testing. Each step is crucial to ensure the quality and performance of the battery cell.

[0064] Between cold pressing and die cutting, plasma surface treatment can be performed on the electrode sheet according to process requirements to modify the electrode surface and ensure that the surface quality of the electrode sheet meets certain process standards.

[0065] In the plasma processing device of the related technology, the electrode sheet is prone to shaking during the transmission process, which leads to uneven treatment of the two sides of the electrode sheet by the plasma processing device, making it impossible for the surface quality of the electrode sheet to meet the requirements.

[0066] Therefore, this application proposes an electrode plasma treatment device. By setting an adjusting roller and a plasma generator, when the plasma generator nozzle sprays plasma onto the surface of the electrode, the electrode vibration can be reduced, making the plasma surface treatment of the electrode more uniform and ensuring that the surface quality of the electrode meets the requirements.

[0067] The electrode plasma processing apparatus disclosed in this application can be used in electrode processing equipment. Electrode processing equipment may include electrode cold presses or electrode die-cutting machines, etc.

[0068] According to some embodiments of this application, please refer to Figure 1, which is a structural schematic diagram of an electrode plasma processing apparatus 100 according to some embodiments of this application. The electrode plasma processing apparatus 100 includes a housing 10, an unwinding mechanism 20, and a winding mechanism 30. The unwinding mechanism 20 is disposed inside the housing 10 and is used to unwind the electrode 800. The winding mechanism 30 is disposed inside the housing 10 and is used to wind the electrode 800.

[0069] The unwinding mechanism 20 may include one or more unwinding rollers. The unwinding mechanism 20 can neatly and orderly place the electrode roll, and can also release the electrode roll at a predetermined speed and tension, allowing the electrode roll to be fed continuously and stably. The winding mechanism 30 may include one or more winding rollers, and the winding mechanism 30 can wind the electrode roll at a predetermined speed and tension. Of course, the unwinding mechanism 20 and the winding mechanism can also have other structural forms, which are not limited in this application.

[0070] The electrode plasma treatment apparatus 100 also includes at least one adjusting roller 40, which is arranged between the unwinding mechanism 20 and the winding mechanism 30, and is used to transport the electrode 800.

[0071] For example, there is one adjusting roller 40, which can cooperate with one side of the electrode 800 in the thickness direction to support the electrode 800 and change the transmission path of the electrode 800.

[0072] For example, the number of adjusting rollers 40 is at least two, including at least a first adjusting roller 41 and a second adjusting roller 42. The first adjusting roller 41 and the second adjusting roller 42 are arranged parallel to each other. The first adjusting roller 41 and the second adjusting roller 42 can respectively cooperate with both sides of the electrode sheet 800 in the thickness direction, on the one hand to support the electrode sheet 800, and on the other hand to change the transmission path of the electrode sheet 800. The arrangement of the first adjusting roller 41 and the second adjusting roller 42 can be selected as needed.

[0073] Please refer to Figure 1 again, and further refer to Figure 2. Figure 2 is a schematic diagram of the structure of the plasma generator 50 of the electrode plasma treatment apparatus 100 shown in Figure 1. The electrode plasma treatment apparatus 100 also includes at least one plasma generator 50, which is arranged inside the housing 10. The plasma generator 50 includes a nozzle 51, which is used to perform surface treatment on the electrode 800 laid on the adjusting roller 40.

[0074] For example, the number of plasma generators 50 can be one, and the number of regulating rollers 40 can be one or more. The nozzle 51 of the plasma generator 50 and one of the regulating rollers 40 can be arranged on both sides of the electrode 800 in the thickness direction. The regulating roller 40 contacts one side of the electrode 800 in the thickness direction to support the electrode 800, while the nozzle 51 of the plasma generator 50 can perform surface treatment on the other side surface of the electrode 800 laid on the regulating roller 40.

[0075] For example, the number of plasma generators 50 can be at least two, and correspondingly, the number of regulating rollers 40 can be at least two. One of the nozzles 51 of the at least two plasma generators 50 is used to perform surface treatment on one side surface of the electrode 800 laid on the first regulating roller 41, and the nozzle 51 of the other of the at least two plasma generators 50 is used to perform surface treatment on the other side surface of the electrode 800 laid on the second regulating roller 42.

[0076] Specifically, at least two plasma generators 50 include a first plasma generator 501 and a second plasma generator 502, and at least two regulating rollers 40 include a first regulating roller 41 and a second regulating roller 42. The first regulating roller 41 is arranged opposite to and spaced apart from the nozzle 51 of the first plasma generator 501, so that there is a gap between the surface of the first regulating roller 41 and the nozzle 51 of the first plasma generator 501. The second regulating roller 42 is arranged opposite to and spaced apart from the nozzle 51 of the second plasma generator 502, so that there is a gap between the surface of the second regulating roller 42 and the nozzle 51 of the second plasma generator 502. On the one hand, this allows the electrode 800 to pass through the gap between the nozzle 51 and the corresponding regulating roller 40, and on the other hand, it allows the nozzle 51 to spray plasma onto the electrode 800 on the corresponding regulating roller 40, thereby using the nozzles 51 of at least two plasma generators 50 to perform surface treatment on both sides of the electrode 800 in the thickness direction.

[0077] The "plasma" here is a state of matter containing active particles such as ions, electrons, free radicals, excited-state atoms and molecules. Specifically, a specific gas (such as oxygen, nitrogen, argon, etc.) can be introduced into the reaction chamber 513 of the nozzle 51, and a high-frequency electric field can be applied to ionize the gas to generate plasma.

[0078] The active particles of plasma can interact physically and chemically with the surface of electrode 800. For example, high-speed collisions of plasma ions with the electrode 800 surface can remove contaminants (oil, dust, etc.). When plasma is generated using oxygen ionization, oxygen-containing functional groups (such as hydroxyl and carboxyl groups) are introduced onto the electrode 800 surface, thereby altering the chemical properties of the electrode 800 surface and improving its surface quality. For instance, this can improve the adhesion of active materials, conductive agents, and binders in the electrode 800, or promote better absorption of electrolyte by the electrode 800, or enhance surface conductivity.

[0079] When the electrode plasma treatment device 100 is working, the unwinding mechanism 20 and the winding mechanism 30 cooperate to realize the transmission of the electrode roll. During this process, it is necessary to control the tension and speed of the unwinding mechanism 20 and the winding mechanism 30 to reduce damage to the electrode 800 or uneven plasma surface treatment.

[0080] In the technical solution of this application embodiment, by providing at least one adjusting roller 40 and at least one plasma generator 50 in the unwinding mechanism 20 and the winding mechanism 30, when the nozzle 51 of the plasma generator 50 sprays plasma onto the surface of the electrode 800, the adjusting roller 40 can support the sprayed surface of the electrode 800, reduce the vibration of the electrode 800, and make the plasma treatment of the surface of the electrode 800 more uniform, thereby improving the surface treatment effect of at least the plasma generator 50 on the electrode 800, so that the surface quality of the electrode 800 meets the requirements, and thus the battery cell has better cycle stability and higher energy density. In addition, the adjusting roller 40 can also support and tension the electrode 800, so that the electrode 800 can be stably transported.

[0081] The nozzle 51 can be designed according to the size of the electrode 800 and the processing requirements so that the plasma can act uniformly on the surface of the electrode 800.

[0082] Please refer to Figure 2 again, and further refer to Figures 3 and 4. Figure 3 is a rear view of the plasma generator 50 shown in Figure 2; Figure 4 is a structural cross-sectional view along line AA in Figure 3. In some embodiments, the nozzle 51 has a mounting surface 511, which is disposed opposite to the adjusting roller 40. The mounting surface 511 is provided with jet holes 512, and the mounting surface 511 is an arc surface corresponding to the surface shape of the corresponding adjusting roller 40.

[0083] Specifically, the nozzle 51 of the first plasma generator 501 has a first mounting surface, which is opposite to and spaced apart from the first adjusting roller 41. The first mounting surface is provided with a first jet hole, which can spray plasma toward one side surface of the electrode 800 laid on the first adjusting roller 41. The surface of the first adjusting roller 41 is a cylindrical surface, and the first mounting surface is an arc surface corresponding to the surface shape of the first adjusting roller 41.

[0084] The nozzle 51 of the second plasma generator 502 has a second mounting surface, which is opposite to and spaced apart from the second adjusting roller 42. The second mounting surface is provided with a second jet hole, which can spray plasma toward the other side surface of the electrode 800 laid on the second adjusting roller 42. The surface of the second adjusting roller 42 is a cylindrical surface, and the second mounting surface is an arc surface corresponding to the surface shape of the second adjusting roller 42.

[0085] The number of first jet holes can be multiple, and these multiple first jet holes can be arranged in the length and width directions of the first mounting surface. The number of second jet holes can also be multiple, and these multiple second jet holes can be arranged in the length and width directions of the second mounting surface.

[0086] In the above technical solution, by setting the mounting surface 511 as an arc surface corresponding to the surface shape of the corresponding adjusting roller 40, multiple jet holes 512 can spray plasma relatively uniformly onto the electrode 800 laid on the adjusting roller 40, thereby improving the surface treatment effect of the electrode 800.

[0087] Please refer to Figure 1 again. In some embodiments, the distance between the surface of the adjusting roller 40 and the corresponding mounting surface 511 is greater than or equal to 1 mm.

[0088] Specifically, as shown in Figure 1, the minimum distance between the surface of the first adjusting roller 41 and the first mounting surface of the nozzle 51 of the first plasma generator 501 is L1, which can be 1mm, 1.5mm, 2mm, etc.

[0089] The minimum distance between the surface of the second adjusting roller 42 and the second mounting surface of the nozzle 51 of the second plasma generator 502 is L2, which can be 1mm, 1.5mm, 2mm, etc.

[0090] If the distance between the adjusting roller 40 and the corresponding mounting surface 511 is too small, the electrode 800 may easily come into contact with the nozzle 51 during transmission, posing a risk of scratching or even damaging the electrode 800. Therefore, in the above technical solution, by limiting the distance between the surface of the adjusting roller 40 and the corresponding mounting surface 511 to meet the above range, the risk of the nozzle 51 scratching or damaging the electrode 800 can be reduced, further improving the surface quality of the electrode 800 to meet the requirements.

[0091] Please refer to Figure 1 again. In some embodiments, the surface of the adjusting roller 40 is equidistant from the corresponding mounting surface 511.

[0092] In other words, in the embodiment where the plasma generator 50 includes a first plasma generator 501 and the adjusting roller 40 includes a first adjusting roller 41, the distance between the surface of the first adjusting roller 41 and the first mounting surface of the nozzle 51 of the first plasma generator 501 at any position is L1, so that the distance between the plurality of first jet holes on the first mounting surface and the surface of the first adjusting roller 41 is equal.

[0093] Similarly, in embodiments where the plasma generator 50 includes a second plasma generator 502 and the adjusting roller 40 includes a second adjusting roller 42, the distance between the surface of the second adjusting roller 42 and the second mounting surface of the nozzle 51 of the second plasma generator 502 at any position is L2, thereby making the distance between the plurality of second jet holes on the second mounting surface and the surface of the second adjusting roller 42 equal.

[0094] Therefore, in the above technical solution, by setting the surface of the adjusting roller 40 and the corresponding mounting surface 511 at equal intervals, the plasma ejected from the multiple jet holes 512 can adhere more evenly to the surface of the electrode 800 on the corresponding adjusting roller 40, so that the plasma treats the surface of the electrode 800 more evenly, thereby ensuring that the surface quality of the electrode 800 meets the requirements.

[0095] Referring again to Figures 1 and 2, in some embodiments, the plasma generator 50 further includes a protective cover 52 that defines a chamber 520 with an opening facing the corresponding regulating roller 40, and a nozzle 51 disposed within the chamber 520.

[0096] The protective cover 52 is provided with an air extraction port 521, which is connected to the chamber 520. The electrode plasma treatment device 100 also includes an air extraction pipe 60, which is connected to the air extraction port 521.

[0097] Specifically, when the electrode plasma treatment device 100 is working, the nozzle 51 can continuously spray plasma onto the surface of the electrode 800 to perform surface treatment on the electrode 800. At the same time, the protective cover 52 can collect residual gas near the nozzle 51 and other locations inside the housing 10, and then use the exhaust pipe 60 to discharge the residual gas from the housing 10. For example, it can be discharged directly to the outside, or discharged to the outside after being purified by the purification component, or the residual gas can be treated by chemical washing, catalytic combustion, biological treatment, etc.

[0098] Therefore, in the above technical solution, by setting up a protective cover 52, on the one hand, the nozzle 51 can be protected, improving the reliability of the nozzle 51; on the other hand, residual gas can be collected, making it easier to discharge the residual gas from the housing 10, reducing the residual gas from escaping into the space where the electrode plasma treatment device 100 is located, and ensuring that the air in the space where the electrode plasma treatment device 100 is located meets the requirements.

[0099] Please refer to Figure 1 again. In some embodiments, the electrode plasma treatment apparatus 100 further includes a telescopic tube 70, one end of which is connected to the air extraction port 521, and the other end of which is connected to the air extraction pipe 60, so that the telescopic tube 70 connects the chamber 520 and the air extraction pipe 60.

[0100] Specifically, in embodiments where at least two plasma generators 50 are a first plasma generator 501 and a second plasma generator 502, the number of telescopic tubes 70 is at least two, namely a first telescopic tube 71 and a second telescopic tube 72. The air extraction port 521 of the nozzle 51 of the first plasma generator 501 can be connected to the air extraction pipe 60 through the first telescopic tube 71, and the air extraction port 521 of the nozzle 51 of the second plasma generator 502 can be connected to the air extraction pipe 60 through the second telescopic tube 72.

[0101] In the above technical solution, by setting the telescopic tube 70, on the one hand, the plasma generator 50 can be adaptively adjusted according to other structures in the housing 10 without affecting the connection between the plasma generator 50 and the exhaust pipe 60. On the other hand, it can reduce the pulling of the exhaust pipe 60 when the plasma generator 50 shakes or moves, which is beneficial to improving the reliability of the electrode plasma treatment device 100.

[0102] Please refer to Figures 3 and 4 again, and further refer to Figure 5, which is a structural cross-sectional view along line BB in Figure 3. In some embodiments, a reaction chamber 513 is defined within the nozzle 51, and the reaction chamber 513 communicates with the jet hole 512 on the nozzle 51.

[0103] The plasma generator 50 also includes at least one air pipe connector 522, one end of which is connected to an air source and the other end of which is connected to a nozzle 51.

[0104] When the electrode plasma treatment apparatus 100 is in operation, a gas source can supply gas to the reaction chamber 513 through the gas pipe connector 522. For example, if there is one gas pipe connector 522 and the gas source is nitrogen, nitrogen can be supplied to the reaction chamber 513 through the gas pipe connector 522. Alternatively, if there is one gas pipe connector 522 and the gas source is compressed air, compressed air can be supplied to the reaction chamber 513 through the gas pipe connector 522. Yet another example is that if there are two gas pipe connectors 522 and the gas sources are nitrogen and compressed air, nitrogen and compressed air can be supplied to the reaction chamber 513 respectively through the two gas pipe connectors 522.

[0105] Here, the nitrogen pressure can be 0.55 MPa and the flow rate can be 1400 L / min, and the compressed air pressure can be 0.55 MPa and the flow rate can be 1400 L / min.

[0106] Therefore, by setting the gas pipe connector 522, it is convenient to introduce the gas source into the reaction chamber 513, so that the plasma generator 50 can excite the gas in the reaction chamber 513 to generate plasma, thereby allowing the plasma to be ejected from the nozzle and to treat the surface of the electrode 800.

[0107] In some embodiments, the electrode plasma processing apparatus 100 further includes a gas supply system and a vacuum system. The gas supply system can be used to precisely control the type and flow rate of the gas introduced into the reaction chamber 513, and the vacuum system can be used to adjust the gas pressure in the reaction chamber 513 to create a suitable plasma generation environment.

[0108] Please refer to Figures 4 and 5, and further refer to Figure 6, which is an enlarged view of part C shown in Figure 5. In some embodiments, the protective cover 52 is provided with a first through hole 523, and a sealing ring 524 is provided inside the protective cover 52. The sealing ring 524 surrounds the first through hole 523, one end of the sealing ring 524 is connected to the protective cover 52, and the other end abuts against the nozzle 51.

[0109] The air pipe connector 522 passes through the first through hole 523 and is located inside the sealing ring 524, so that the air pipe connector 522 can be connected to the nozzle 51. For example, the nozzle 51 has a threaded hole on the wall opposite to the first through hole 523, and the air pipe connector 522 can be threadedly connected to the threaded hole.

[0110] The first through hole 523 can provide clearance for the air pipe connector 522, allowing the air pipe connector 522 to be connected to the nozzle 51. Since one end of the sealing ring 524 is connected to the protective cover 52 and the other end abuts against the nozzle 51, the sealing ring 524 can seal the chamber 520 defined by the protective cover 52, reducing gas leakage in the chamber 520.

[0111] Please refer to Figure 5 again. In some embodiments, the nozzle 51 is provided with a high-voltage wire connector 525. One end of the high-voltage wire connector 525 extends into the reaction chamber 513. The protective cover 52 has a second through hole 526, which is used to avoid the high-voltage wire connector 525.

[0112] The second through hole 526 can provide clearance for the high-voltage wire connector 525, allowing the high-voltage wire connector 525 to be connected to the nozzle 51. For example, the nozzle 51 has a through hole on the wall opposite to the second through hole 526, one end of the high-voltage wire connector 525 is inserted into the reaction chamber 513, and the other end of the high-voltage wire connector 525 is used to connect to the power system. The high-voltage wire connector 525 can be fixed to the wall opposite to the nozzle 51 and the second through hole 526 using multiple fasteners.

[0113] The high-voltage connector 525 is connected to the power system and can provide a high-frequency electric field, which excites the gas introduced into the reaction chamber 513 to generate plasma, thereby allowing the plasma to be used to treat the surface of the electrode 800.

[0114] Please refer to Figure 3 again. In some embodiments, a reaction chamber 513 is defined inside the nozzle 51, and a flow channel (not shown in the figure) is defined inside the wall of the nozzle 51. The flow channel can surround the reaction chamber 513. The nozzle 51 is provided with an inlet 514 and an outlet 515, both of which are connected to the flow channel.

[0115] This configuration allows coolant to be introduced into the wall of the nozzle 51 to exchange heat with the nozzle 51, thereby reducing the temperature of the nozzle 51. This enables the nozzle 51 to spray low-temperature plasma onto the electrode 800 on the corresponding regulating roller 40, thus reducing damage to the surface of the electrode 800 and facilitating precise control.

[0116] Please refer to Figure 5 again, and further to Figure 7, which is a structural schematic diagram of the plasma generator 50 shown in Figure 2 from another perspective. In some embodiments, the electrode plasma treatment apparatus 100 further includes a mounting frame (not shown in the figure), which is fixed inside the housing 10. The plasma generator 50 is movably mounted on the mounting frame so that the position of the plasma generator 50 relative to the corresponding adjusting roller 40 is adjustable.

[0117] Specifically, the number of mounting brackets is equal to the number of plasma generators 50, and their positions correspond one-to-one, so that the position of the plasma generators 50 relative to the adjusting rollers 40 is adjustable.

[0118] In the above technical solution, by movably mounting the plasma generator 50 on the mounting frame, the position of the plasma generator 50 relative to the corresponding adjusting roller 40 can be adjusted as needed. This not only allows the plasma generator 50 to perform surface treatment on electrode sheets 800 of different widths, but also ensures that the distance between the nozzle 51 of the plasma generator 50 and the corresponding adjusting roller 40 meets the requirements, thereby improving the surface treatment effect of the plasma generator 50 on the electrode sheets 800.

[0119] Please refer to Figures 5 and 7 again. In some embodiments, the axial direction of the adjusting roller 40 extends along a first horizontal direction, and the plasma generator 50 and the corresponding adjusting roller 40 are arranged opposite each other in a second horizontal direction, which is perpendicular to the first horizontal direction.

[0120] The mounting bracket is equipped with an adjusting member 533 and a slider 532. The adjusting member 533 can rotate relative to the mounting bracket, and the rotation axis of the adjusting member 533 extends along the second horizontal direction. The slider 532 can move relative to the mounting bracket along the second horizontal direction. The slider 532 is fixedly connected to the plasma generator 50, and the adjusting member 533 and the slider 532 rotate in coordination.

[0121] When the adjusting member 533 is rotated, the rotational motion of the adjusting member 533 can be converted into the movement of the slider 532. Thus, the slider 532 can be used to drive the plasma generator 50 to move along the second horizontal direction, thereby adjusting the distance between the nozzle 51 of the plasma generator 50 and the corresponding adjusting roller 40.

[0122] Specifically, a fixing member 531 can be provided on the mounting frame. An adjusting member 533 and a slider 532 are mounted on the mounting frame via the fixing member 531. At least one guide rod 534 extending in the second horizontal direction can be provided on the fixing member 531. The slider 532 is slidably engaged with the guide rod 534. When the adjusting member 533 is rotated, the slider 532 can move along the length direction of the guide rod 534, thereby using the slider 532 to drive the plasma generator 50 to move relative to the mounting frame in the second horizontal direction.

[0123] More specifically, the mounting bracket is provided with two fasteners 531, which are arranged at intervals in the first horizontal direction. The plasma generator 50 is connected to both ends of the two fasteners 531 through sliders 532 in the first horizontal direction.

[0124] For example, the plasma generator 50 is provided with a connecting bracket 527 that connects the slider 532 and the plasma generator 50 together. For example, the connecting bracket 527 includes two connecting plates arranged at an angle, one of which is connected to the plasma generator 50 by a fastener, and the other connecting plate is connected to the slider 532 by a fastener.

[0125] For example, the adjusting member 533 includes an adjusting rod that is threadedly engaged with the slider 532, and one end of the adjusting rod is provided with a handle for easy gripping and operation.

[0126] In the above technical solution, by setting an adjusting member 533 and a slider 532 on the mounting frame, the slider 532 can be moved by rotating the adjusting member 533, thereby using the slider 532 to drive the plasma generator 50 to move relative to the mounting frame in the second horizontal direction, so as to adjust the distance between the plasma generator 50 and the corresponding adjusting roller 40.

[0127] Please refer to Figure 7 again. In some embodiments, the mounting bracket is provided with a fixing member 531 that is movable in the first horizontal direction, and the slider 532 is mounted on the fixing member 531 so as to move in the first horizontal direction under the drive of the fixing member 531.

[0128] For example, one of the mounting bracket and the fastener 531 is provided with a guide rail extending along a first horizontal direction, and the other is provided with a groove that slides with the guide rail. A locking element may also be provided on the fastener 531, which can cooperate with the mounting bracket to lock the fastener 531 at a certain position along the first horizontal direction.

[0129] For example, a rotating component can be installed on the mounting bracket, with the axis of rotation of the rotating component extending along a first horizontal direction. The fixing component 531 can be rotatably engaged with the rotating component, for example, by a threaded engagement. When the rotating component is rotated, the fixing component 531 can be driven to move along the first horizontal direction, thereby driving the plasma generator 50 to move relative to the mounting bracket along the first horizontal direction via the slider 532.

[0130] In the above technical solution, by setting the fixing member 531, the plasma generator 50 can be moved along the first horizontal direction, so that the plasma generator 50 can perform surface treatment on electrode sheets 800 of different widths, making it more adaptable.

[0131] Please refer to Figures 1-4 again. The number of adjusting rollers 40 is at least two, including a first adjusting roller 41 and a second adjusting roller 42. The number of plasma generators 50 is at least two, including a first plasma generator 501 and a second plasma generator 502.

[0132] Specifically, the first adjusting roller 41 and the second adjusting roller 42 are located between the unwinding mechanism 20 and the winding mechanism 30, and are arranged parallel to each other. The first adjusting roller 41 and the second adjusting roller 42 can respectively cooperate with both sides of the electrode sheet 800 in the thickness direction, on the one hand supporting the electrode sheet 800, and on the other hand changing the transmission path of the electrode sheet 800. The arrangement of the first adjusting roller 41 and the second adjusting roller 42 can be selected as needed.

[0133] At least one plasma generator 50 nozzle 51 is used to perform surface treatment on one side surface of the electrode 800 laid on the first regulating roller 41, and at least another plasma generator 50 nozzle 51 is used to perform surface treatment on the other side surface of the electrode 800 laid on the second regulating roller 42.

[0134] Specifically, the first adjusting roller 41 is arranged opposite to and spaced apart from the nozzle 51 of the first plasma generator 501, so that there is a gap between the surface of the first adjusting roller 41 and the nozzle 51 of the first plasma generator 501, and the second adjusting roller 42 is arranged opposite to and spaced apart from the nozzle 51 of the second plasma generator 502, so that there is a gap between the surface of the second adjusting roller 42 and the nozzle 51 of the second plasma generator 502.

[0135] This configuration allows the electrode 800 to pass through the gap between the nozzle 51 and the corresponding adjusting roller 40, while also enabling the nozzle 51 to spray plasma onto the electrode 800 on the corresponding adjusting roller 40, thereby utilizing the nozzles 51 of at least two plasma generators 50 to perform surface treatment on both sides of the electrode 800 in the thickness direction.

[0136] Please refer to Figure 1 again. In some embodiments, the nozzle 51 has a mounting surface 511, which is disposed opposite to the adjusting roller 40. The mounting surface 511 is provided with air jet holes 512, and the mounting surface 511 is an arc surface corresponding to the surface shape of the corresponding adjusting roller 40.

[0137] The distance between the surface of the first adjusting roller 41 and the corresponding mounting surface 511 is L1, and the distance between the surface of the second adjusting roller 42 and the corresponding mounting surface 511 is L2, where L2 equals L1. This arrangement makes the surface treatment of the two oppositely positioned sides of the electrode 800 more uniform, further improving the surface quality of the electrode 800.

[0138] Please refer to Figures 1-4 again. In some embodiments, the nozzle 51 has a mounting surface 511, which is disposed opposite to the adjusting roller 40. The mounting surface 511 is provided with air jet holes 512, and the mounting surface 511 is an arc surface corresponding to the surface shape of the corresponding adjusting roller 40.

[0139] The first adjusting roller 41 and the second adjusting roller 42 both extend axially along a first horizontal direction; at least two nozzles 51 are arranged in a second horizontal direction, which is perpendicular to the first horizontal direction. Here, the first horizontal direction is the X direction shown in Figure 2, and the second horizontal direction is the Y direction shown in Figure 2.

[0140] Referring to Figures 1 and 4, the mounting surfaces 511 of at least two nozzles 51 are respectively formed as concave arc surfaces that are bent in opposite directions in the second horizontal direction.

[0141] That is, the nozzles 51 of the first plasma generator 501 and the nozzles 51 of the second plasma generator 502 are arranged in the second horizontal direction. The nozzles 51 of the first plasma generator 501 have a first mounting surface, and the nozzles 51 of the second plasma generator 502 have a second mounting surface. Both the first mounting surface and the second mounting surface are bent along the second horizontal direction and the bending directions are opposite.

[0142] For example, the first mounting surface and the second mounting surface can be disposed opposite to each other in the second horizontal direction, the first mounting surface is formed as an arc surface that bends away from the second mounting surface in the second horizontal direction, and the second mounting surface is formed as an arc surface that bends away from the first mounting surface in the second horizontal direction.

[0143] For example, the first mounting surface and the second mounting surface can be arranged opposite to each other in the second horizontal direction. The first mounting surface is formed as an arc surface that bends toward the second mounting surface in the second horizontal direction, and the second mounting surface is formed as an arc surface that bends toward the first mounting surface in the second horizontal direction.

[0144] In the above technical solution, by forming the mounting surfaces 511 of the two nozzles 51 into concave arc surfaces that are bent in opposite directions in the second horizontal direction, the two nozzles 51 are symmetrically arranged in the vertical direction (Z direction as shown in Figure 1) perpendicular to the first horizontal direction and the second horizontal direction. This can reduce the influence of gravity on the plasma ejected by the nozzles 51, and make the treatment effect of the two nozzles 51 on the two oppositely arranged side surfaces of the electrode 800 as consistent as possible, thereby further improving the surface quality of the electrode 800.

[0145] Please refer to Figure 8, which is a partial structural schematic diagram of an electrode plasma treatment apparatus 100 according to some embodiments of this application. In some embodiments, the first adjusting roller 41 and the second adjusting roller 42 both extend axially along a first horizontal direction, and the first adjusting roller 41 and the second adjusting roller 42 are arranged opposite to each other in the vertical direction.

[0146] In the above technical solution, by arranging the first adjusting roller 41 and the second adjusting roller 42 relative to each other in the vertical direction, the size of the electrode plasma treatment device 100 in the second horizontal direction can be reduced, thereby reducing the space occupied by the electrode plasma treatment device 100 in the second horizontal direction.

[0147] In some embodiments, the distance M1 between the first adjusting roller 41 and the second adjusting roller 42 in the vertical direction is 25cm-150cm. For example, the distance M1 between the first adjusting roller 41 and the second adjusting roller 42 in the vertical direction can be 25cm, 60cm, 100cm, 120cm, 150cm, etc.

[0148] If the distance M1 between the first adjusting roller 41 and the second adjusting roller 42 in the vertical direction is too small, the plasma generators 50 corresponding to the first adjusting roller 41 and the second adjusting roller 42 will easily interfere with each other, and the plasma generators 50 corresponding to the second adjusting roller 42 and the first adjusting roller 41 will easily interfere with each other, which is not conducive to the arrangement of the plasma generators 50. If the distance M1 between the first adjusting roller 41 and the second adjusting roller 42 in the vertical direction is too large, it will increase the space occupied by the electrode plasma processing device 100 in the vertical direction.

[0149] Therefore, in the above technical solution, by limiting the distance M1 between the first adjusting roller 41 and the second adjusting roller 42 in the vertical direction to meet the above range, on the one hand, it is beneficial to arrange the plasma generator 50 and reduce interference between the structural components, and on the other hand, it can reduce the space occupied by the electrode plasma processing device 100 in the vertical direction.

[0150] Please refer to Figure 9, which is a partial structural schematic diagram of an electrode plasma treatment apparatus 100 according to some embodiments of this application. In some embodiments, the first adjusting roller 41 and the second adjusting roller 42 both extend axially along a first horizontal direction, and the first adjusting roller 41 and the second adjusting roller 42 are arranged opposite to each other in a second horizontal direction, which is perpendicular to the first horizontal direction.

[0151] In the above technical solution, by arranging the first adjusting roller 41 and the second adjusting roller 42 opposite to each other in the second horizontal direction, the size of the electrode plasma treatment device 100 in the vertical direction can be reduced, thereby reducing the space occupied by the electrode plasma treatment device 100 in the vertical direction.

[0152] In some embodiments, the distance M2 between the first adjusting roller 41 and the second adjusting roller 42 in the second horizontal direction is 50cm-200cm. For example, the distance M2 between the first adjusting roller 41 and the second adjusting roller 42 in the second horizontal direction can be 50cm, 80cm, 10cm, 140cm, 180cm, 200cm, etc.

[0153] If the distance M2 between the first adjusting roller 41 and the second adjusting roller 42 in the second horizontal direction is too small, the plasma generator 50 corresponding to the first adjusting roller 41 and the second adjusting roller 42 will easily interfere, and the plasma generator 50 corresponding to the second adjusting roller 42 and the first adjusting roller 41 will easily interfere, which is not conducive to the arrangement of the plasma generator 50. If the distance M2 between the first adjusting roller 41 and the second adjusting roller 42 in the second horizontal direction is too large, it will not only increase the space occupied by the electrode plasma processing device 100 in the second horizontal direction, but also make it difficult to control the tension of the electrode 800, making the electrode 800 located on the first adjusting roller 41 and the second adjusting roller 42 prone to vibration.

[0154] Therefore, in the above technical solution, by limiting the distance M2 between the first adjusting roller 41 and the second adjusting roller 42 in the second horizontal direction to meet the above range, on the one hand, it is beneficial to arrange the plasma generator 50 and reduce interference between various structural components; on the other hand, it can reduce the space occupied by the electrode plasma processing device 100 in the second horizontal direction and improve the stability of the electrode 800 transportation.

[0155] Please refer to Figure 10, which is a partial structural schematic diagram of an electrode plasma treatment apparatus 100 according to some embodiments of this application. In some embodiments, the first adjusting roller 41 and the second adjusting roller 42 both extend axially along a first horizontal direction, and the first adjusting roller 41 and the second adjusting roller 42 are arranged in a second horizontal direction and a vertical direction, with the second horizontal direction being perpendicular to the first horizontal direction.

[0156] In the above technical solution, by arranging the first adjusting roller 41 and the second adjusting roller 42 in the second horizontal direction and the vertical direction, the size of the electrode plasma treatment device 100 in the second horizontal direction and the vertical direction can be reduced, thereby reducing the space occupied by the electrode plasma treatment device 100 in the second horizontal direction and the vertical direction.

[0157] In some embodiments, the distance M3 between the first adjusting roller 41 and the second adjusting roller 42 in the direction of extension of the line connecting their centers is 60cm-250cm. For example, the distance M3 between the first adjusting roller 41 and the second adjusting roller 42 in the direction of extension of the line connecting their centers can be 60cm, 100cm, 150cm, 200cm, 250cm, etc.

[0158] If the distance M3 between the first adjusting roller 41 and the second adjusting roller 42 in the extension direction of their center line is too small, the plasma generators 50 corresponding to the first adjusting roller 41 and the second adjusting roller 42 will easily interfere, and the plasma generators 50 corresponding to the second adjusting roller 42 and the first adjusting roller 41 will easily interfere, which is not conducive to the arrangement of the plasma generators 50. If the distance M3 between the first adjusting roller 41 and the second adjusting roller 42 in the extension direction of their center line is too large, it will not only increase the space occupied by the electrode plasma processing device 100, but also make it difficult to control the tension of the electrode 800, making the electrode 800 located on the first adjusting roller 41 and the second adjusting roller 42 prone to vibration.

[0159] Therefore, in the above technical solution, by limiting the distance M3 between the first adjusting roller 41 and the second adjusting roller 42 in the extension direction of their center line to meet the above range, on the one hand, it is beneficial to arrange the plasma generator 50 and reduce interference between various structural components, and on the other hand, it can reduce the space occupied by the electrode plasma processing device 100 and improve the stability of the electrode 800 transportation.

[0160] According to some embodiments of this application, this application also provides an electrode processing apparatus, including the electrode plasma processing device 100 described in any of the above embodiments.

[0161] In the technical solution of this application embodiment, by using the above-mentioned electrode plasma treatment device 100, the surface quality of the electrode 800 can meet the requirements, thereby enabling the battery cell to have better cycle stability and higher energy density.

[0162] In some embodiments, the electrode processing equipment includes an electrode cold press. Specifically, after the electrode 800 is cold-pressed by the electrode cold press, the electrode 800 can be surface-treated by an electrode plasma treatment device 100.

[0163] Among them, the electrode cold press can apply uniform pressure to the electrode 800, which reduces the thickness and increases the density of the electrode 800, thereby making the contact between the active material of the electrode 800 and the current collector more compact, thereby reducing the internal resistance of the battery cell and improving its electrochemical performance.

[0164] In some embodiments, the electrode processing equipment includes an electrode die-cutting machine. Specifically, after the electrode plasma treatment apparatus 100 performs surface treatment on the electrode 800, the electrode 800 can be cut using an electrode die-cutting machine.

[0165] Among them, the electrode die-cutting machine can precisely cut the electrode 800 according to the predetermined size to meet the design requirements of the battery cell.

[0166] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has 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. These 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, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electrode plasma treatment device, wherein, include: Box; An unwinding mechanism, located inside the housing, is used to unwind the electrode sheet; A winding mechanism, located inside the housing, is used to wind up the electrode sheet; At least one adjusting roller is arranged between the unwinding mechanism and the winding mechanism for transporting the electrode sheet; At least one plasma generator is arranged inside the housing and includes a nozzle for surface treatment of the electrode sheet laid on the regulating roller.

2. The electrode plasma treatment apparatus according to claim 1, wherein, The nozzle has a mounting surface opposite to the adjusting roller, the mounting surface is provided with air jet holes, and the mounting surface is an arc surface corresponding to the surface shape of the corresponding adjusting roller.

3. The electrode plasma treatment apparatus according to claim 2, wherein, The distance between the surface of the adjusting roller and the corresponding mounting surface is greater than or equal to 1 mm.

4. The electrode plasma treatment apparatus according to claim 2, wherein, The surface of the adjusting roller is equidistant from the corresponding mounting surface.

5. The electrode plasma treatment apparatus according to claim 1, wherein, The plasma generator also includes a protective cover that defines a chamber with an opening facing the regulating roller, and the nozzle is disposed in the chamber; The protective cover is provided with an exhaust port that communicates with the chamber, and the electrode plasma treatment device also includes an exhaust pipe that communicates with the exhaust port.

6. The electrode plasma treatment apparatus according to claim 5, wherein, The electrode plasma treatment device further includes: A telescopic tube, one end of which is connected to the air extraction port and the other end of which is connected to the air extraction pipe, so as to connect the chamber and the air extraction pipe.

7. The electrode plasma treatment apparatus according to claim 5, wherein, The nozzle defines a reaction chamber, which is connected to the air jet hole on the nozzle. The plasma generator also includes at least one gas pipe connector, one end of which is connected to a gas source and the other end is connected to the nozzle to supply gas into the reaction chamber.

8. The electrode plasma treatment apparatus according to claim 7, wherein, The protective cover has a first through hole, and a sealing ring is provided inside the protective cover surrounding the first through hole. One end of the sealing ring is connected to the protective cover and the other end abuts against the nozzle. The air pipe connector passes through the first through hole and is located inside the sealing ring to connect with the nozzle.

9. The electrode plasma treatment apparatus according to claim 7, wherein, The nozzle is equipped with a high-voltage wire connector, one end of which extends into the reaction chamber. The protective cover has a second through hole for avoiding the high-voltage wire connector.

10. The electrode plasma treatment apparatus according to claim 1, wherein, The nozzle defines a reaction chamber, and the nozzle wall defines a flow channel that surrounds the reaction chamber. The nozzle is provided with an inlet and an outlet, both of which are connected to the flow channel.

11. The electrode plasma treatment apparatus according to claim 1, wherein, Also includes: The mounting bracket is fixed inside the housing, and the plasma generator is movably mounted on the mounting bracket so that the position of the plasma generator relative to the adjusting roller is adjustable.

12. The electrode plasma treatment apparatus according to claim 11, wherein, The axial direction of the adjustment roller extends along a first horizontal direction, and the plasma generator and the corresponding adjustment roller are arranged opposite each other in a second horizontal direction, the second horizontal direction being perpendicular to the first horizontal direction. The mounting bracket is equipped with a rotatable adjusting component and a slider that can move along the second horizontal direction. The slider is fixedly connected to the plasma generator. The adjusting component and the slider rotate to convert the rotational motion of the adjusting component into the movement motion of the slider, thereby driving the plasma generator to move along the second horizontal direction.

13. The electrode plasma treatment apparatus according to claim 12, wherein, The mounting bracket is provided with a fixing member that can move along the first horizontal direction, and the slider is mounted on the fixing member so as to move along the first horizontal direction under the drive of the fixing member.

14. The electrode plasma treatment apparatus according to any one of claims 1-13, wherein, The number of adjusting rollers is at least two, including a first adjusting roller and a second adjusting roller; The number of plasma generators is at least two, at least one of the plasma generators has a nozzle used to perform surface treatment on one side surface of the electrode sheet laid on the first adjusting roller, and at least another plasma generator has a nozzle used to perform surface treatment on the other side surface of the electrode sheet laid on the second adjusting roller.

15. The electrode plasma treatment apparatus according to claim 14, wherein, The nozzle has a mounting surface that is opposite to the corresponding adjusting roller, the mounting surface is provided with air jet holes, and the mounting surface is an arc surface that corresponds to the surface shape of the corresponding adjusting roller; Wherein, the distance between the surface of the first adjusting roller and the mounting surface of the corresponding nozzle is L1, and the distance between the surface of the second adjusting roller and the mounting surface of the corresponding nozzle is L2, wherein L2 is equal to L1.

16. The electrode plasma treatment apparatus according to claim 14, wherein, The nozzle has a mounting surface that is opposite to the corresponding adjusting roller, the mounting surface is provided with air jet holes, and the mounting surface is an arc surface that corresponds to the surface shape of the corresponding adjusting roller; The first adjusting roller and the second adjusting roller both extend axially along a first horizontal direction, and at least two nozzles are arranged in a second horizontal direction, which is perpendicular to the first horizontal direction. The mounting surfaces of the at least two nozzles are respectively formed as concave arc surfaces that are bent in opposite directions in the second horizontal direction.

17. The electrode plasma treatment apparatus according to claim 14, wherein, The first adjusting roller and the second adjusting roller both extend axially along the first horizontal direction, and the first adjusting roller and the second adjusting roller are arranged opposite each other in the vertical direction.

18. The electrode plasma treatment apparatus according to claim 17, wherein, The distance between the first adjusting roller and the second adjusting roller in the vertical direction is 25cm-150cm.

19. The electrode plasma treatment apparatus according to claim 14, wherein, The first adjusting roller and the second adjusting roller both extend axially along a first horizontal direction, and the first adjusting roller and the second adjusting roller are arranged opposite each other in a second horizontal direction, which is perpendicular to the first horizontal direction.

20. The electrode plasma treatment apparatus according to claim 19, wherein, The distance between the first adjusting roller and the second adjusting roller in the second horizontal direction is 50cm-200cm.

21. The electrode plasma treatment apparatus according to claim 14, wherein, The first adjusting roller and the second adjusting roller both extend axially along the first horizontal direction. The first adjusting roller and the second adjusting roller are arranged in the second horizontal direction and the vertical direction, and the second horizontal direction is perpendicular to the first horizontal direction.

22. The electrode plasma treatment apparatus according to claim 21, wherein, The distance between the first adjusting roller and the second adjusting roller in the direction of extension of the line connecting their centers is 60cm-250cm.

23. An electrode processing device, wherein, Includes the electrode plasma treatment apparatus according to any one of claims 1-22.

24. The electrode processing equipment according to claim 23, wherein, The electrode processing equipment includes an electrode cold press or an electrode die-cutting machine.

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