Pole piece roll material drying device

Abstract

The utility model relates to the field of battery processing, and discloses a pole piece roll material drying device which comprises a drying mechanism. The drying mechanism comprises a drying chamber, conductive assemblies and a power supply, the conductive assemblies are arranged in the drying chamber, the two conductive assemblies are oppositely arranged along the two sides of the first direction, and the conductive assemblies are used for being in contact with tabs on the two sides of the pole piece roll material along the first direction; the power supply is arranged outside the drying chamber and is electrically connected with the conductive assembly; the conductive assembly comprises a plurality of conductive terminals, each conductive terminal is provided with a plurality of flexible conductive fibers extending in the first direction, the flexible conductive fibers are used for being in lap joint with the tabs, and the flexible conductive fibers are electrically connected with a power source. By means of the device, the pole piece coil stock can be heated and dried through Joule heat, the energy conversion efficiency is improved, and the drying efficiency is improved. In addition, the flexible conductive fibers can also improve the adaptability to a large-size pole piece roll material and reduce the temperature difference of each part of the pole piece roll material.

Description

Technical Field

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

[0002] New energy batteries are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with batteries are already widely used. In addition, batteries are being used more and more in the field of energy storage.

[0003] In battery-powered new energy vehicles, batteries can provide all or part of the power. In the energy storage field, batteries can be installed in energy storage boxes or directly on the user side. During the battery manufacturing process, the battery electrodes need to be dried before winding or stacking. With the increasing demand for batteries, the industry's requirements for electrode drying efficiency are also constantly increasing. Therefore, how to improve electrode drying efficiency is one of the research topics in the industry. Utility Model Content

[0004] To solve the above-mentioned technical problems, this application provides an electrode roll drying device.

[0005] This application is achieved through the following technical solution.

[0006] A first aspect of this application provides an electrode roll drying apparatus for drying electrode rolls, including a drying mechanism;

[0007] The drying mechanism includes a drying chamber, conductive components, and a power supply. The conductive components are disposed inside the drying chamber, and two conductive components are disposed opposite each other on both sides along a first direction.

[0008] The conductive component is used to contact the tabs on both sides of the electrode roll along the first direction.

[0009] The power supply is located outside the drying chamber and is electrically connected to the conductive component.

[0010] The conductive component includes multiple conductive terminals, each conductive terminal having multiple flexible conductive fibers extending along the first direction. The flexible conductive fibers are used to overlap with the tabs and are electrically connected to the power source.

[0011] In the technical solution of this application embodiment, since the conductive component forms a circuit with the tab, the electrode roll can be directly used as a conductor in the dry state. Joule heating is generated when current passes through, improving energy conversion efficiency compared to hot air heating, infrared heating, thermal radiation heating, and magnetic induction heating. Furthermore, the heating speed is faster, which can shorten the drying time and improve drying efficiency to a certain extent. In addition, the flexible conductive fiber overlaps with the tab from both sides in the first direction, avoiding rigid contact that could scratch the tab. This also improves adaptability to large-size electrode rolls, shortens the current flow path, and improves heating and drying efficiency. Simultaneously, it allows the current to cover a larger area in the first direction, improving the drying effect and reducing temperature differences between different parts of the electrode roll.

[0012] In some embodiments, the elongation direction of the flexible conductive fiber is parallel to the axial direction of the electrode roll in a dry state.

[0013] In the technical solution of this application embodiment, since the elongation direction of the flexible conductive fiber is parallel to the axial direction of the electrode roll in the dry state, the fit between the flexible conductive fiber and the electrode tab can be improved, the contact stability and the reliability of the established circuit can be improved, the contact resistance can be reduced, local current concentration can be avoided, and electrode tab heating can be reduced.

[0014] In some embodiments, the conductive component includes an insulating plate, the insulating plates of two conductive components are disposed opposite to each other along the first direction, and the flexible conductive fiber is disposed on the surfaces of the two insulating plates disposed opposite to each other along the first direction.

[0015] In the technical solution of this application embodiment, since the insulating plate can be provided with flexible conductive fibers, it is beneficial that the flexible conductive fibers on both sides can contact the electrode tabs to form a symmetrical conductive structure. At the same time, it is also convenient to manage the flexible conductive fibers and avoid the risk of mutual interference or short circuits and leakage with other metal parts of the drying chamber.

[0016] In some embodiments, the insulating plate is a circular plate, and the axis of the insulating plate is aligned with the axis of the electrode roll in a dry state. The electrode roll is projected along the first direction onto a projection plane perpendicular to the first direction, and the projection of the electrode roll falls completely into the projection of the insulating plate.

[0017] In the technical solution of this application embodiment, since the insulating plate is a circular plate, it is beneficial to align the insulating plate and the electrode roll with the same axis. Flexible conductive fibers are pre-arranged on the insulating plate according to the position of the electrode tab, which facilitates precise alignment and contact with the electrode tab, avoids local overheating caused by irregular current conduction path, and further improves the heating consistency of the inner and outer rings of the electrode roll.

[0018] In some embodiments, the conductive component includes a telescopic component connected to the insulating plate, the telescopic component being used to move the two insulating plates closer to or further apart from each other along the first direction.

[0019] In the technical solution of this application embodiment, since the telescopic component can drive the insulating plate to extend and retract, it can prevent the flexible conductive fibers of the electrode roll from colliding and breaking or losing when they enter and exit the drying chamber, protecting the flexible conductive fibers from extending normally along the first direction, and also preventing scratches on the tabs on both sides of the electrode roll. In addition, the contact pressure and contact length between the flexible conductive fibers and the tabs can be controlled by telescopic extension, increasing the adaptability to different types and sizes of electrode rolls, and also improving process stability.

[0020] In some embodiments, each of the conductive components is provided with a telescopic component, the telescopic component including a telescopic arm connected to an insulating plate and a first controller, the first controller being used to control the telescopic arm to extend or retract.

[0021] In the technical solution of this application embodiment, since the first controller is used to control the extension and retraction of the telescopic arm, automated and precise control can be achieved through the first controller, improving synchronization and contact accuracy, and also improving operating efficiency and adapting to automated production.

[0022] In some embodiments, the drying mechanism includes a cooling chamber disposed downstream of the drying chamber for cooling the electrode roll.

[0023] In the technical solution of this application embodiment, since the drying mechanism includes a cooling chamber located downstream, the dried electrode roll can be cooled without the need for natural cooling and waiting, thus shortening the production time and adapting to subsequent downstream electrode processing.

[0024] In some embodiments, the drying chamber and the cooling chamber are equipped with infrared temperature sensors.

[0025] In the technical solution of this application embodiment, since infrared temperature sensors are provided in the drying chamber and the cooling chamber, precise temperature control of the electrode roll material can be achieved, preventing excessive drying time or insufficient cooling.

[0026] In some embodiments, the electrode roll drying apparatus includes a conveying mechanism for conveying electrode rolls into or out of the drying chamber; the conveying mechanism includes a guide rail and a transport vehicle, the transport vehicle being configured to move along the guide rail, and the transport vehicle including a support base for accommodating the electrode rolls.

[0027] In the technical solution of this application embodiment, since the transport vehicle can move along the guide rail to transport the electrode roll, the conveying efficiency can be improved, and the loading, unloading and precise positioning can be facilitated, thereby improving the drying efficiency. In addition, the support base can accommodate the electrode roll, avoiding the electrode roll from shaking, rolling or shifting in position during the conveying process.

[0028] In some embodiments, in the drying chamber, the two conductive components are respectively disposed on both sides of the guide rail along a first direction.

[0029] In the technical solution of this application embodiment, since the conductive components are respectively disposed on both sides of the guide rail along the first direction, after the transport vehicle is in place along the guide rail, the electrode roll can be placed between the two conductive components, and the conductive components can directly contact the two electrode tabs respectively, shortening the drying preparation time and improving the drying efficiency.

[0030] In some embodiments, the contact pressure between the flexible conductive fiber and the tab is in the range of 5-50N, and / or, along the first direction, the overlap length between the flexible conductive fiber and the tab is in the range of 2-35mm.

[0031] In the technical solution of this application embodiment, since the contact pressure and overlap length between the flexible conductive fiber and the electrode are within a suitable range, the contact performance between the two can be optimized, taking into account both the contact area and the risk of short circuit, as well as the contact resistance and the safety of the electrode.

[0032] In some embodiments, the flexible conductive fiber includes carbon fiber.

[0033] In the technical solution of this application embodiment, since the flexible conductive fiber includes carbon fiber, the conductivity of the flexible conductive fiber can be improved. At the same time, carbon fiber also has good flexibility and toughness, and its low density also reduces the load on the conductive component.

[0034] The beneficial effects of this application's embodiments include: This application enables the heating and drying of electrode rolls using Joule heating, which improves energy conversion efficiency compared to hot air heating, infrared heating, thermal radiation heating, and magnetic induction heating. Furthermore, the heating speed is faster, which can shorten drying time and improve drying efficiency to a certain extent. In addition, the flexible conductive fibers overlap with the electrode tabs from both sides in the first direction, avoiding rigid contact that could scratch the tabs. This also improves adaptability to large-size electrode rolls, shortens the current flow path, and enhances heating and drying efficiency. Simultaneously, it allows the current to cover a larger area in the first direction, improving the drying effect and reducing temperature differences between different parts of the electrode roll.

[0035] 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

[0036] 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:

[0037] Figure 1 This is a schematic diagram of the structure of the electrode roll drying apparatus provided in some embodiments of this application;

[0038] Figure 2 A schematic diagram of the structure of an electrode roll in a dry state provided in some embodiments of this application;

[0039] Figure 3 This is a schematic diagram of the structure of an insulating plate provided in some embodiments of this application;

[0040] Figure 4 This is a schematic diagram of the structure of a conductive terminal provided in some embodiments of this application.

[0041] Explanation of reference numerals in the attached figures

[0042] 100. Electrode roll drying device; 200. Electrode roll; 201. Electrode tab; 202. Insulating and heat-insulating film; 10. Drying mechanism; 11. Drying chamber; 12. Conductive component; 121. Conductive terminal; 122. Flexible conductive fiber; 123. Insulating board; 13. Power supply; 14. Telescopic component; 141. Telescopic arm; 142. First controller; 15. Cooling chamber; 16. Infrared temperature sensor; 17. Buffer chamber; 20. Conveying mechanism; 21. Guide rail; 22. Transport vehicle; 23. Second controller; 221. Support base. Detailed Implementation

[0043] 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.

[0044] 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 belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in this document and the foregoing description of the accompanying drawings are intended to cover non-exclusive inclusion.

[0045] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" 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.

[0046] 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.

[0047] 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 are in an "or" relationship.

[0048] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., 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 do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0049] 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0050] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0051] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "parallel" and "perpendicular" are both subject to a certain degree of tolerance and / or error, including cases of being approximately parallel and approximately perpendicular.

[0052] The following is a detailed description of this application.

[0053] Currently, new energy batteries are being used more and more widely in daily life and industry. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0054] In the battery manufacturing process, wet processing of electrodes is commonly used. Battery electrodes are obtained by coating an active material layer onto a current collector. Before winding or stacking, the battery electrodes need to be dried at least once to evaporate the solvent on the electrodes. With the increasing demand for batteries, the industry's requirements for electrode drying efficiency are also constantly increasing. Therefore, how to improve electrode drying efficiency is one of the research and development topics in the industry.

[0055] Through research and design, a method has been developed to dry the coiled material formed after the electrode sheets are wound, thereby improving drying efficiency. This method utilizes the thermal effect of electric current to heat the coiled material, enhancing energy utilization and electrode drying efficiency.

[0056] Based on this design concept, this application designs an electrode roll drying device, including a drying mechanism; the drying mechanism includes a drying chamber, conductive components and a power supply, the conductive components are disposed inside the drying chamber, and two conductive components are disposed opposite each other on both sides along a first direction; the conductive components are used to contact the electrode tabs on both sides of the electrode roll along the first direction; the power supply is disposed outside the drying chamber and is electrically connected to the conductive components; the conductive components include multiple conductive terminals, and the conductive terminals have multiple flexible conductive fibers extending along the first direction, the flexible conductive fibers are used to overlap with the electrode tabs, and the flexible conductive fibers are electrically connected to the power supply.

[0057] Because the conductive components form a circuit when in contact with the tabs, the electrode roll can be directly used as a conductor in the dry state. Joule heating is generated when current passes through, improving energy conversion efficiency compared to hot air heating, infrared heating, thermal radiation heating, and magnetic induction heating. Furthermore, the heating speed is faster, which can shorten drying time and improve drying efficiency to some extent. In addition, the flexible conductive fibers overlap with the tabs from both sides in the first direction, avoiding scratches from rigid contact and improving adaptability to large-sized electrode rolls. This shortens the current flow path and improves heating and drying efficiency. Simultaneously, it allows the current to cover a larger area in the first direction, improving the drying effect and reducing temperature differences between different parts of the electrode roll.

[0058] In the embodiments of this application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0059] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0060] Although not illustrated, a single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0061] In some embodiments, the electrode assembly has tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0062] In some embodiments, the electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0063] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0064] Below, refer to Figures 1 to 4 Some embodiments of this application will be described in detail.

[0065] Figure 1 This is a schematic diagram of the structure of the electrode roll drying apparatus provided in some embodiments of this application; Figure 2 A schematic diagram of the structure of an electrode roll in a dry state provided in some embodiments of this application; Figure 3 This is a schematic diagram of the structure of an insulating plate provided in some embodiments of this application; Figure 4 This is a schematic diagram of the structure of a conductive terminal provided in some embodiments of this application.

[0066] In some embodiments of this application, for ease of explanation, a first direction and a second direction are defined, and the directions of the first direction and the second direction intersect each other. Here, intersecting each other includes perpendicularly intersecting each other. For ease of understanding of the embodiments of this application, the embodiments shown in Figures 1 to 4 are illustrated using the example of the first direction and the second direction being perpendicularly intersecting each other. However, those skilled in the art should understand that the embodiments of this application are not limited to the case where the two directions intersect each other perpendicularly. For ease of explanation, as shown by the arrows in Figures 1 to 4, the direction where arrow X is located is the first direction, and the direction where arrow Y is located is the second direction.

[0067] The first aspect of this application provides an electrode roll drying apparatus 100. In the embodiments of this application, the electrode roll drying apparatus 100 for drying electrode roll 200 includes a drying mechanism 10; the drying mechanism 10 includes a drying chamber 11, a conductive component 12 and a power supply 13. The conductive component 12 is disposed inside the drying chamber 11, and two conductive components 12 are disposed opposite each other on both sides along a first direction (X); the conductive component 12 is used to contact the tabs 201 on both sides of the electrode roll 200 along the first direction (X); the power supply 13 is disposed outside the drying chamber 11 and is electrically connected to the conductive component 12; the conductive component 12 includes a plurality of conductive terminals 121, and the conductive terminals 121 have a plurality of flexible conductive fibers 122 extending along the first direction (X), the flexible conductive fibers 122 are used to overlap with the tabs 201, and the flexible conductive fibers 122 are electrically connected to the power supply 13.

[0068] It is understood that the electrode roll drying device 100 is an integrated device for drying the electrode roll 200, and includes at least a drying mechanism 10 for drying the electrode roll 200.

[0069] For example, the electrode roll drying device 100 is applied to the electrode drying section, and the device is located downstream of the electrode rolling equipment and upstream of the electrode slitting and die-cutting equipment.

[0070] Optionally, the electrode roll drying device 100 can be designed as a single-chamber structure, that is, having a single drying chamber 11; or it can be designed as a multi-chamber series structure, that is, having multiple drying chambers 11 connected in series.

[0071] Optionally, the electrode roll drying apparatus 100 may have other chambers, such as a cooling chamber 15, a buffer chamber 17, etc. Other chambers may be connected in series with the drying chamber 11.

[0072] For example, the electrode roll drying apparatus 100 includes a tunnel heating furnace having multiple chambers including a drying chamber 11.

[0073] It is understandable that "electrode roll 200" refers to the roll formed after the electrode is wound, or simply "electrode roll".

[0074] Optionally, the electrode roll 200 can be a roll formed by winding a positive electrode or a roll formed by winding a negative electrode. This application embodiment does not limit this.

[0075] Optionally, this application embodiment does not limit the size or weight of the electrode roll 200.

[0076] As is understandable, an electrode includes a positive electrode and a negative electrode, and an electrode includes a current collector and a conductive material coated on the current collector. The positive electrode usually uses aluminum foil as the current collector, on which a positive electrode material (such as lithium iron phosphate LiFePO4, ternary material NCM, etc.) is coated; the negative electrode usually uses copper foil as the current collector, on which a negative electrode material (such as graphite) is coated.

[0077] For example, the electrode sheet has tabs 201, and the electrode sheet roll 200 also has tabs 201.

[0078] It is understood that in this embodiment, the tab 201 is an extension structure on both sides of the electrode roll 200 for conductive connection. It is a current collector portion without active material coating, has a certain thickness, and protrudes from both sides of the electrode roll 200 along the first direction (X). This application embodiment does not limit the length of the protruding portion of the tab 201.

[0079] Optionally, the material of the tab 201 can be the same as or different from that of the current collector.

[0080] For example, the positive electrode 201 is made of aluminum, and the negative electrode 201 is made of copper or copper-nickel composite material.

[0081] Optionally, the tab 201 can be a single-layer structure or a multi-layer stacked structure, and this application embodiment does not limit this.

[0082] Understandably, tab 201 serves as an interface for current input / output, capable of contacting the flexible conductive fiber 122 of conductive component 12 to form a closed loop.

[0083] For example, a conductive mechanism is provided inside the drying chamber 11, and a power supply 13 is provided outside the drying chamber 11. The conductive mechanism is electrically connected to the power supply 13.

[0084] As another example, the drying mechanism 10 may also include a vacuum system (not shown) that can extract air from the drying chamber 11 before the electrode roll 200 is heated and dried, so as to prevent high-temperature oxidation of the tabs 201, etc.

[0085] Optionally, power supply 13 can be a DC high current generator, and this application does not limit the output current range of power supply 13.

[0086] For example, the current generator can provide a large current of 5000A.

[0087] It is understood that the power supply 13 can be connected to the conductive terminal 121 of the conductive component 12 via a wire. That is, one end of the conductive terminal 121 is connected to the power supply 13, and the other end is left suspended for connection with the tab 201.

[0088] For example, power supply 13 can also output pulse current to avoid local overheating of the electrode by adjusting the pulse parameters.

[0089] As another example, the drying mechanism 10 may be designed with a backup power supply 13, which can automatically switch to the backup power supply 13 when the main power supply 13 fails, so as to facilitate continued production.

[0090] It is understandable that the conductive terminal 121 is the fixing base and current conduction carrier of the flexible conductive fiber 122.

[0091] Optionally, the conductive terminal 121 can be bound or embedded with flexible conductive fibers 122 using a conductive metal base. The base material can be a high-conductivity copper alloy (such as copper or beryllium copper), and the surface can be silver-plated to reduce contact resistance. The size and shape are designed according to the number of fibers.

[0092] For example, such as Figure 3As shown, the conductive terminal 121 adopts a modular design, with multiple conductive terminals 121 distributed on the insulating plate 123 along the winding direction of the tab 201. Each terminal can be replaced independently, reducing maintenance costs.

[0093] As another example, in some embodiments not shown, the conductive terminals 121 may be continuously arranged without gaps and have the same shape as the tabs 201 wound around. This increases the contact area and improves the drying effect.

[0094] It is understandable that the flexible conductive fiber 122 is the conductive medium in the conductive terminal 121 that is in direct contact with the tab 201. Multiple flexible conductive fibers 122 can be bundled into fiber bundles, and the material can be carbon fiber or metal-coated fiber, which has good flexibility.

[0095] Optionally, this application does not limit the length of the flexible conductive fiber 122.

[0096] For example, the flexible conductive fiber 122 extends along a first direction (X) and can overlap with the tab 201 protruding along the first direction (X).

[0097] It is understood that in the embodiments of this application, the current collector of the electrode is heated by resistance heat, and the coating on the surface of the current collector has greater resistance. While the current flows and heats up, it can also be heated by the heat conducted by the current collector, thus achieving the purpose of drying.

[0098] Optionally, in some embodiments not shown, multiple pairs of conductive components 12 may be provided in the drying chamber 11, each pair of conductive components 12 including two conductive components 12 arranged along a first direction (X) for simultaneously drying multiple electrode rolls 200.

[0099] In the technical solution of this application embodiment, since the conductive component 12 forms a circuit with the tab 201, the electrode roll 200 can be directly used as a conductor in the dry state. When current passes through, Joule heating is generated, which improves the energy conversion efficiency compared to hot air heating, infrared heating, thermal radiation heating, and magnetic induction heating. Furthermore, the heating speed is faster, which can shorten the drying time and improve the drying efficiency to a certain extent. In addition, the flexible conductive fiber 122 overlaps with the tab 201 from both sides of the first direction (X), avoiding rigid contact that could scratch the tab 201. This also improves the adaptability to large-size electrode rolls 200, shortens the current flow path, and improves heating and drying efficiency. Simultaneously, the current can cover a larger area in the first direction (X), improving the drying effect and reducing the temperature difference between different parts of the electrode roll 200. Moreover, the current flowing along the first direction (X) through the current collector has better uniformity compared to flowing along the winding direction of the current collector. In real-world scenarios, there may be broken electrode strips or broken strips that are held together by adhesive tape in the electrode roll 200. This solution can prevent current interruption and failure to dry in such cases.

[0100] In the embodiments of this application, the elongation direction of the flexible conductive fiber 122 is parallel to the axial direction of the electrode roll 200 in a dry state.

[0101] For example, such as Figure 2 As shown, the elongation direction of the flexible conductive fiber 122 is the first direction (X), and the axial direction of the electrode roll 200 in the dry state is also the first direction (X). It can be understood that the axial direction of the electrode roll 200 is consistent with the width direction of the electrode. This facilitates current coverage of the entire width of the electrode, enabling the current to effectively heat and dry the electrode roll 200 without the need for other heating methods.

[0102] It is understandable that the stretching direction of the flexible conductive fiber 122 is parallel to the axis of the electrode roll 200, and can be perfectly matched with the length direction of the tab 201 (which usually extends along the axis of the roll), reducing the contact resistance to less than 0.1Ω, which is beneficial for efficient and uniform current conduction.

[0103] In the technical solution of the embodiments of this application, it can be understood that non-parallel overlap may cause the fiber to fall off under force in a direction perpendicular to the first direction (X), thereby improving contact reliability; at the same time, the fiber is subjected to more uniform force, reducing fiber breakage caused by local stress concentration and extending the service life of the conductive component 12.

[0104] Since the elongation direction of the flexible conductive fiber 122 is parallel to the axial direction of the electrode roll 200 in a dry state, it can improve the fit between the flexible conductive fiber 122 and the tab 201, improve the contact stability and reliability of the established circuit, reduce the contact resistance, avoid local current concentration, and reduce the heating of the tab 201.

[0105] In an embodiment of this application, the conductive component 12 includes an insulating plate 123, the insulating plates 123 of the two conductive components 12 are disposed opposite to each other along a first direction (X), and the flexible conductive fiber 122 is disposed on the surface of the two insulating plates 123 disposed opposite to each other along the first direction (X).

[0106] For example, such as Figure 3 , Figure 4 As shown, flexible conductive fibers 122 are disposed on the surface of insulating plate 123. Insulating plate 123 provides a fixing carrier for flexible conductive fibers 122, and flexible conductive fibers 122 are evenly arranged according to the positions of tabs 201.

[0107] For example, such as Figure 2 As shown, flexible conductive fibers 122 are disposed on the surfaces of two insulating plates 123 arranged opposite each other along a first direction (X), and the electrode roll 200 in a dry state is placed between the two insulating plates 123. The tabs 201 of the electrode roll 200 are connected to the power supply 13 to form a circuit.

[0108] In the technical solution of this application embodiment, since the insulating plate 123 can be provided with flexible conductive fibers 122, it is beneficial that both sides of the flexible conductive fibers 122 can contact the tabs 201 to form a symmetrical conductive structure. At the same time, it is also convenient to manage the flexible conductive fibers 122 and avoid the risk of mutual interference or short circuits or leakage with other metal parts of the drying chamber 11.

[0109] In the embodiments of this application, the insulating plate 123 is a circular plate, and the axis of the insulating plate 123 is consistent with the axis of the electrode roll 200 in the dry state. It is projected along the first direction (X) to a projection plane perpendicular to the first direction (X), and the projection of the electrode roll 200 completely falls into the projection of the insulating plate 123.

[0110] It is understandable that when projected along the first direction (X) onto a projection plane perpendicular to the first direction (X), the projections of both the electrode roll 200 and the insulating plate 123 are circular. Their axes are aligned.

[0111] It is understandable that the electrode roll 200 after being wrapped with the insulating and heat-insulating film 202 is approximately cylindrical, and its axis is the axis of the cylinder.

[0112] It is understandable that the insulating plate 123 is a circular plate with its axis perpendicular to the surface of the circular plate and passing through the center of the surface.

[0113] Optionally, the insulating plate 123 serves as a carrier for fixing the flexible conductive fiber 122 and achieving electrical insulation, and its material can be plastic resin or ceramic. This application does not limit the thickness of the insulating plate 123.

[0114] Optionally, the surface of the insulating plate 123 is provided with micropores for fixing the flexible conductive fiber 122 or the conductive terminal 121.

[0115] In the technical solution of this application embodiment, since the insulating plate 123 is a circular plate, it is beneficial for the insulating plate 123 to be coaxially aligned with the electrode roll 200. Flexible conductive fibers 122 are pre-arranged on the insulating plate 123 according to the position of the electrode tab 201, which facilitates precise alignment and contact with the electrode tab 201, avoids local overheating caused by irregular current conduction path, and further improves the heating consistency of the inner and outer rings of the electrode roll 200.

[0116] In an embodiment of this application, the conductive component 12 includes a telescopic component 14, which is connected to the insulating plate 123. The telescopic component 14 is used to drive the two insulating plates 123 to move closer or further apart from each other along a first direction (X).

[0117] It is understood that the telescopic component 14 is a mechanism that drives the conductive component 12 to move closer to / away from the electrode roll 200, and the driving method can be electric, pneumatic or hydraulic.

[0118] For example, the telescopic component 14 may be electrically driven, with its extension and retraction controlled by a servo motor and a ball screw.

[0119] As another example, the telescopic assembly 14 may be pneumatic, and the telescopic assembly 14 may include a cylinder, the output shaft of which is connected to the insulating plate 123.

[0120] As another example, the telescopic assembly 14 may be hydraulically driven and may include a hydraulic cylinder.

[0121] This application embodiment does not limit parameters such as the stroke and positioning accuracy of the telescopic component 14.

[0122] In the technical solution of this application embodiment, since the telescopic component 14 can drive the insulating plate 123 to extend and retract, when the electrode roll 200 enters and exits the drying chamber 11, it can prevent the flexible conductive fibers 122 of the electrode roll 200 from colliding and breaking or losing the fibers, protect the flexible conductive fibers 122 from extending normally along the first direction (X), and also prevent scratching the tabs 201 on both sides of the electrode roll 200. In addition, the contact pressure and contact length between the flexible conductive fibers 122 and the tabs 201 can be controlled by telescopic extension, increasing the adaptability to different types and sizes of electrode rolls 200, and also improving process stability.

[0123] In the embodiments of this application, each conductive component 12 is provided with a telescopic component 14. The telescopic component 14 includes a telescopic arm 141 connected to the insulating plate 123 and a first controller 142. The first controller 142 is used to control the telescopic arm 141 to extend or retract.

[0124] It is understandable that the telescopic arm 141 is the actuating component of the telescopic assembly 14, and is connected to the insulating plate 123, so that the telescopic action can be accurately transmitted.

[0125] Alternatively, the telescopic arm 141 can be connected to the insulating plate 123 by means of bolts, snap-fit, adhesive, etc.

[0126] The shape and structure of the telescopic arm 141 are not limited in this application embodiment, as long as it can realize the telescopic movement along the first direction (X).

[0127] Understandably, the first controller 142 is capable of controlling the movement of the telescopic component 14.

[0128] Optionally, the first controller 142 may be a PLC (Programmable Logic Controller) or a motion controller, capable of controlling position, stroke, speed, contact pressure, etc.

[0129] Optionally, the telescopic assembly 14 also has a sensor for detecting contact status, contact pressure, etc., and the sensor can be mounted on the insulating plate 123.

[0130] In the technical solution of this application embodiment, since the first controller 142 is used to control the extension and retraction of the telescopic arm 141, the first controller 142 can realize automated and precise control, improve synchronization and contact accuracy, and also improve operating efficiency and adapt to automated production.

[0131] In an embodiment of this application, the drying mechanism 10 includes a cooling chamber 15, which is located downstream of the drying chamber 11 and is used to cool the electrode roll 200.

[0132] For example, such as Figure 1 As shown, the electrode drying device is a tunnel furnace, with its inner cavity divided into a drying chamber 11 and a cooling chamber 15.

[0133] Optionally, the cooling chamber 15 and the drying chamber 11 are separated by an insulated gate, which can be opened or closed.

[0134] Understandably, the cooling chamber 15 is used to cool the dried electrode roll 200. It is located downstream of the drying chamber 11 and is cooled by introducing low-temperature inert gas or nitrogen.

[0135] In the technical solution of this application embodiment, since the drying mechanism 10 includes a cooling chamber 15 disposed downstream, the dried electrode roll 200 can be cooled without natural cooling and waiting, thus shortening the production time and adapting to subsequent downstream electrode processing.

[0136] In the embodiments of this application, infrared temperature sensors 16 are provided in the drying chamber 11 and the cooling chamber 15.

[0137] Understandably, the infrared temperature sensor 16 is a non-contact temperature detection device that monitors the surface temperature of the electrode roll 200 in real time.

[0138] For example, the infrared temperature sensor 16 is installed at the top of the drying chamber 11 and the cooling chamber 15 at the position corresponding to the electrode roll 200.

[0139] Optionally, the number of infrared temperature sensors 16 in the drying chamber 11 or cooling chamber 15 can be one or more, and this application embodiment does not limit this.

[0140] Optionally, the drying chamber 11 or cooling chamber 15 may also be equipped with temperature measuring devices such as thermocouples or thermal imagers.

[0141] In the technical solution of this application embodiment, since the drying chamber 11 and the cooling chamber 15 are equipped with infrared temperature sensors 16, the electrode roll 200 can be precisely controlled to prevent the drying time from being too long or the cooling from being insufficient.

[0142] In the embodiments of this application, the electrode roll drying apparatus 100 includes a conveying mechanism 20, which is used to convey the electrode roll 200 into or out of the drying chamber 11; the conveying mechanism 20 includes a guide rail 21 and a transport vehicle 22, the transport vehicle 22 is configured to move along the guide rail 21, and the transport vehicle 22 includes a support 221, which is used to accommodate the electrode roll 200.

[0143] Understandably, the conveying mechanism 20 is a device that enables the transfer of electrode roll 200. The electrode roll 200 is carried by the transport vehicle 22 into the drying chamber 11, and after drying, it enters the cooling chamber 15 and is sent out after cooling.

[0144] For example, the transport vehicle 22 is an AGV (Automated Guided Vehicle), and the guide rail 21 is a guiding structure that constrains the movement path of the transport vehicle 22. The length can be designed as needed.

[0145] Optionally, the guide rail 21 can be a circular guide rail or a linear guide rail. This application does not limit the material, shape, etc. of the guide rail 21.

[0146] For example, the guide rail 21 set at the bottom of the furnace body is a linear guide rail segment that extends along the second direction (Y). The first direction (X) is perpendicular to the second direction (Y), and both directions are perpendicular to the direction of gravity.

[0147] For example, the guide rail 21 has a toothed track, which works with the transport vehicle 22 to achieve precise positioning of ±5mm.

[0148] As another example, the transport vehicle 22 is controlled by a second controller 23, which may be a PLC, and is used in conjunction with laser sensors, etc., for positioning.

[0149] It is understood that the transport vehicle 22 is a device that carries the electrode roll 200 to move along the guide rail 21 and can carry 2 tons of material. This application embodiment does not limit the driving method or navigation method of the transport vehicle 22.

[0150] For example, the transport vehicle 22 can also be an RGV trolley, i.e. a rail-guided vehicle. The rail-guided RGV can transport the electrode roll 200. The RGV can be in the form of a circular track, and multiple vehicles can travel back and forth, or a single vehicle can travel back and forth.

[0151] Understandably, the support base 221 is a component on the transport vehicle 22 that fixes and carries the electrode roll 200. It is made of high temperature resistant material and the surface can be coated with anti-slip coating or rubber to prevent the roll from sliding or shifting.

[0152] Optionally, the transport vehicle 22 can integrate a roll rotation mechanism, which is connected to the support base 221. The support base 221 can be rotated to adjust the roll angle when the tab 201 is misaligned, so as to facilitate alignment with the conductive component 12.

[0153] In the technical solution of this application embodiment, since the transport vehicle 22 can move along the guide rail 21 to transport the electrode roll 200, the conveying efficiency can be improved, and the loading, unloading and precise positioning can be facilitated, thereby improving the drying efficiency. In addition, the support base 221 can accommodate the electrode roll 200 and prevent the electrode roll 200 from shaking, rolling or shifting in position during the transport process.

[0154] In an embodiment of this application, in the drying chamber 11, two conductive components 12 are respectively disposed on both sides of the guide rail 21 along the first direction (X).

[0155] In the technical solution of this application embodiment, since the conductive components 12 are respectively disposed on both sides of the guide rail 21 along the first direction (X), after the transport vehicle 22 is in place along the guide rail 21, the electrode roll 200 can be placed between the two conductive components 12, and the conductive components 12 can directly contact the two electrode tabs 201 respectively, shortening the drying preparation time and improving the drying efficiency.

[0156] In the embodiments of this application, the contact pressure between the flexible conductive fiber 122 and the tab 201 is in the range of 5-50N, and / or, along the first direction (X), the overlap length between the flexible conductive fiber 122 and the tab 201 is in the range of 2-35mm.

[0157] Optionally, the contact pressure can be 5N, 10N, 15N, 20N, 25N, 30N, 35N, 40N, 45N, 50N, etc. Other values ​​are not listed.

[0158] For example, the tab 201 overlaps with the flexible conductive fiber 122. The tab 201 is flat and both sides of the tab 201 along its thickness direction are in contact with the flexible conductive fiber 122.

[0159] Optionally, the overlap length can be 2mm, 3mm, 4mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, etc. Other values ​​are not listed.

[0160] In the technical solution of this application embodiment, since the contact pressure and overlap length of the flexible conductive fiber 122 and the tab 201 are within a suitable range, the contact performance of the two can be optimized, taking into account both the contact area and the risk of short circuit, as well as the contact resistance and the safety of the tab 201.

[0161] In embodiments of this application, the flexible conductive fiber 122 comprises carbon fiber.

[0162] In the technical solution of this application embodiment, since the flexible conductive fiber 122 includes carbon fiber, the conductivity of the flexible conductive fiber 122 can be improved. At the same time, carbon fiber also has good flexibility and toughness, and the lower density also reduces the load on the conductive component 12.

[0163] A second aspect of this application provides a method for drying electrode roll 200. In this embodiment, the electrode roll 200 is dried using an electrode roll drying apparatus 100, which includes a drying mechanism 10 and a conveying mechanism 20.

[0164] The drying mechanism 10 includes a drying chamber 11, a conductive component 12 and a power supply 13. The conductive component 12 is disposed inside the drying chamber 11, and two conductive components 12 are disposed opposite each other on both sides along the first direction (X).

[0165] The conductive component 12 is used to contact the tabs 201 on both sides of the electrode roll 200 along the first direction (X);

[0166] The power supply 13 is located outside the drying chamber 11 and is electrically connected to the conductive component 12.

[0167] The conductive component 12 includes a plurality of conductive terminals 121, each conductive terminal 121 having a plurality of flexible conductive fibers 122 extending along a first direction (X), the flexible conductive fibers 122 being used to overlap with the tab 201, and the flexible conductive fibers 122 being electrically connected to the power supply 13.

[0168] The conveying mechanism 20 is used to convey the electrode roll 200 into or out of the drying chamber 11; the conveying mechanism 20 includes a guide rail 21 and a transport vehicle 22, the transport vehicle 22 being configured to move along the guide rail 21;

[0169] The drying method for electrode roll 200 includes the following steps:

[0170] The transport vehicle 22 carries the electrode roll 200 into the drying chamber 11;

[0171] After the electrode roll 200 enters the drying chamber 11, the drying chamber 11 is evacuated. After the vacuum pressure reaches the preset value, the flexible conductive fiber 122 overlaps with the electrode tab 201 of the electrode roll 200.

[0172] When power supply 13 is turned on, electrode roll 200 is in a drying state. After drying, the current is disconnected.

[0173] The electrode roll 200 is moved out of the drying chamber 11 by the transport vehicle 22.

[0174] For example, an insulating and heat-insulating film 202 can be used to cover the outer ring of the electrode roll before drying to prevent the outer ring of the electrode roll from expanding due to lack of force during heating.

[0175] For example, after wrapping the insulating and heat-insulating film 202, the wrapped electrode roll is placed into the transport vehicle 22, and the transport vehicle 22 enters the drying chamber 11 by itself.

[0176] For example, after the electrode roll enters the drying chamber 11, the drying chamber 11 begins to be evacuated.

[0177] For example, after the vacuum pressure reaches the target value, the telescopic arm 141 extends, so that the front flexible conductive fiber 122 overlaps with the electrode coil tab 201.

[0178] For example, after successful connection, power supply 13 is turned on, heating the current collector. The current collector heats the active coating through heat conduction. The electrode roll is in a dry state, and its temperature is monitored by the infrared temperature sensor 16 above. The measured temperature is fed back to the host and the first controller 142, which uses PID control to adjust the current, heating time, cooling time, and on / off states. Once the set temperature is reached, the current is cut off, and the telescopic arm 141 retracts.

[0179] For example, after heating is completed, the gate between the drying chamber 11 and the cooling chamber 15 is automatically opened, and the electrode roll is transferred to the cooling chamber 15 by the transport vehicle 22. The cooling chamber 15 reduces the temperature of the electrode roll by continuously introducing low-temperature nitrogen gas. The infrared temperature sensor 16 monitors the temperature of the electrode roll and feeds back the recorded temperature. When the temperature of the electrode roll reaches below 30°C, the cooling is completed, and the electrode roll is sent out by the transport vehicle 22.

[0180] In the technical solution of this application embodiment, the drying process of electrode roll 200 can be fully automated, improving processing and drying efficiency and energy utilization during the drying process.

[0181] In the embodiments of this application, the circumferential surface of the electrode roll 200 is covered with an insulating and heat-insulating film 202 before the electrode roll 200 enters the drying chamber 11.

[0182] Understandably, during the heating and drying process, the inner electrode sheet is subjected to pressure from the outer electrode sheet, causing inconsistent thickness changes between the inner and outer electrode sheets during heating, resulting in poor product consistency. Constraining the outer ring during heating can prevent this from happening and improve product consistency. Heat insulation can also reduce heat loss from the outer electrode sheet, accelerating the drying process.

[0183] It is understandable that the circumferential surface refers to the active material coating of the outermost electrode, excluding the tabs of the outermost electrode.

[0184] Optionally, the insulating and heat-insulating film 202 can be polyimide, aerogel, aluminum silicate fiber, etc., with a winding thickness of not less than 5mm.

[0185] Optionally, when covering the insulating and heat-insulating film 202, the insulating and heat-insulating film 202 can be bound to the electrode roll 200 with a strip, or the insulating and heat-insulating film 202 can be pasted with high-temperature resistant tape.

[0186] Optionally, the insulating and heat-insulating film 202 is provided with some micropores to allow water vapor generated during drying to escape, further shortening the drying time.

[0187] In the technical solution of this application embodiment, since the circumferential surface of the electrode roll 200 is covered by an insulating and heat-insulating film 202 before entering the drying chamber 11, the circumferential surface can be restrained to avoid excessive expansion of the outer electrode during the drying process, thereby improving the drying uniformity and product size consistency, and facilitating subsequent processing of the electrode.

[0188] The specific solutions of the embodiments of this application are described below with reference to the accompanying drawings.

[0189] This application provides an electrode drying apparatus and an electrode drying method.

[0190] In a specific embodiment, the electrode drying device is a vacuum tunnel heating furnace, including a drying mechanism 10 and a conveying mechanism 20; the drying mechanism 10 includes a drying chamber 11, a conductive component 12 and a power supply 13.

[0191] In a specific embodiment, the conveying mechanism 20 includes a transport vehicle 22 and a guide rail 21. The AGV transport vehicle 22 is equipped with a laser navigation system. This vehicle can carry two tons of rolled materials and achieves precise positioning of ±5mm through the toothed guide rail 21 at the bottom. The stainless steel guide rail 21 adopts a double-track tunnel design, combined with a hydraulically opened and closed heat-insulating gate, to achieve seamless connection between the heating station and the cooling station.

[0192] In a specific embodiment, the drying chamber 11 adopts a composite cavity design, with an outer layer of 304 stainless steel insulation layer (200mm thick) and an inner liner of alumina ceramic, and the working vacuum degree can reach -100Kpa.

[0193] In a specific embodiment, the furnace cavity is divided into a drying chamber 11 and a cooling chamber 15, which are separated by a heat-insulating gate. The gate has a hydraulic opening and closing structure. Each chamber is equipped with an infrared temperature sensor 16 at the top to monitor the electrode roll temperature and provide feedback on the electrode roll temperature to control the opening and closing of the heat-insulating gate.

[0194] In a specific embodiment, the furnace cavity also has a buffer chamber 17, which is located on the upstream side of the drying chamber 11, for parking the transport vehicle 22 waiting to enter the drying chamber 11.

[0195] In a specific embodiment, the conductive component 12 includes a telescopic component 14, conductive terminals 121, and an insulating plate 123. The conductive terminals 121 include a plurality of flexible conductive fibers 122. The telescopic component 14 includes a telescopic arm 141 (a freely telescopic mechanical structure). The telescopic arm 141 is connected to and mounted on the insulating plate 123. 3000 flexible conductive fibers 122 (0.05 mm in diameter) are embedded on the surface of the insulating plate 123. The contact pressure between the insulating plate 123 and the electrode tab 201 can be adjusted to 5-50 N.

[0196] In a specific embodiment, when the telescopic arm 141 reaches a specific position, after the flexible conductive fiber 122 overlaps with the electrode tab 201, the contact resistance is <0.1Ω. With the power supply 13 of the 5000A high current generator, the electrode roll can be raised to the target temperature within 1 minute.

[0197] This device uses current heating for drying, solving problems such as electrode tab oxidation and low heating efficiency associated with current methods that primarily rely on hot air heating and thermal radiation heating. Compared to traditional hot air heating, infrared heating, thermal radiation heating, and magnetic induction heating, it offers significant advantages. First, the entire electrode roll is treated as a conductor; the current passing through the conductor directly generates Joule heat, achieving an energy conversion efficiency of 70%–90%, far exceeding traditional combustion or radiation heating, which has an efficiency of approximately 40%, resulting in high energy utilization. Second, current heating requires no preheating; the temperature rises instantly upon power-on, significantly improving heating efficiency. Combined with a PID algorithm, temperature sensor, and closed-loop control system, it achieves ±1°C accuracy, preventing overheating or uneven heating.

[0198] In a specific embodiment, the electrode drying method includes the following steps:

[0199] Before drying, the outer ring of the electrode roll is wrapped with an insulating and heat-insulating film 202.

[0200] After wrapping the insulating and heat-insulating film 202, the wrapped electrode roll is placed into the transport vehicle 22, and the transport vehicle 22 enters the drying chamber 11 by itself.

[0201] After the electrode roll enters the drying chamber 11, the drying chamber 11 begins to be evacuated.

[0202] Once the vacuum pressure reaches the target value, the telescopic arm 141 extends, allowing the front flexible conductive fiber 122 to overlap with the electrode coil tab 201.

[0203] After successful connection, power supply 13 is switched on, heating the current collector. The current collector heats the active coating through heat conduction. The electrode roll is in a dry state, and its temperature is monitored by the infrared temperature sensor 16 above. The measured temperature is fed back to the main unit, which uses a PID controller to adjust the current, heating time, cooling time, and on / off states. Once the set temperature is reached, the current is cut off, and the telescopic arm 141 retracts.

[0204] After heating is completed, the gate between the drying chamber 11 and the cooling chamber 15 opens automatically, and the electrode roll is transferred to the cooling chamber 15 by the transport vehicle 22. The cooling chamber 15 continuously introduces low-temperature nitrogen to reduce the temperature of the electrode roll. The infrared temperature sensor 16 monitors the temperature of the electrode roll and feeds back the recorded temperature. When the temperature of the electrode roll reaches below 30°C, the cooling is completed, and the electrode roll is sent out by the transport vehicle 22.

[0205] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0206] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0207] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0208] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. 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 all should be covered within the scope of protection claimed in this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various 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 protection claimed.

Claims

1. A drying apparatus for electrode rolls, used for drying electrode rolls, characterized in that, Includes a drying mechanism; The drying mechanism includes a drying chamber, conductive components, and a power supply. The conductive components are disposed inside the drying chamber, and two conductive components are disposed opposite each other on both sides along a first direction. The conductive component is used to contact the tabs on both sides of the electrode roll along the first direction. The power supply is located outside the drying chamber and is electrically connected to the conductive component. The conductive component includes multiple conductive terminals, each conductive terminal having multiple flexible conductive fibers extending along the first direction. The flexible conductive fibers are used to overlap with the tabs and are electrically connected to the power source.

2. The electrode roll drying apparatus according to claim 1, characterized in that, The elongation direction of the flexible conductive fiber is parallel to the axial direction of the electrode roll in the dry state.

3. The electrode roll drying apparatus according to claim 2, characterized in that, The conductive component includes an insulating plate, and the insulating plates of the two conductive components are disposed opposite each other along the first direction. The flexible conductive fiber is disposed on the surfaces of the two insulating plates disposed opposite each other along the first direction.

4. The electrode roll drying apparatus according to claim 3, characterized in that, The insulating plate is a circular plate, and the axis of the insulating plate is aligned with the axis of the electrode roll in a dry state; the projection of the electrode roll onto a projection plane perpendicular to the first direction is completely within the projection of the insulating plate.

5. The electrode roll drying apparatus according to claim 3, characterized in that, The conductive component includes a telescopic component connected to the insulating plate, which is used to move the two insulating plates closer to or further apart from each other along the first direction.

6. The electrode roll drying apparatus according to claim 5, characterized in that, Each of the conductive components is provided with a telescopic component, the telescopic component including a telescopic arm connected to an insulating plate and a first controller, the first controller being used to control the telescopic arm to extend or retract.

7. The electrode roll drying apparatus according to any one of claims 1 to 6, characterized in that, The drying mechanism includes a cooling chamber located downstream of the drying chamber for cooling the electrode roll.

8. The electrode roll drying apparatus according to claim 7, characterized in that, Infrared temperature sensors are installed in the drying chamber and the cooling chamber.

9. The electrode roll drying apparatus according to any one of claims 1 to 6, characterized in that, The electrode roll drying device includes a conveying mechanism, which is used to convey the electrode roll into or out of the drying chamber. The conveying mechanism includes a guide rail and a transport vehicle. The transport vehicle is configured to move along the guide rail and includes a support base for accommodating the electrode roll.

10. The electrode roll drying apparatus according to claim 9, characterized in that, In the drying chamber, the two conductive components are respectively disposed on both sides of the guide rail along the first direction.

11. The electrode roll drying apparatus according to any one of claims 1 to 6, characterized in that, The contact pressure between the flexible conductive fiber and the tab is in the range of 5-50N, and / or, along the first direction, the overlap length between the flexible conductive fiber and the tab is in the range of 2-35mm.

12. The electrode roll drying apparatus according to any one of claims 1 to 6, characterized in that, The flexible conductive fiber includes carbon fiber.

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