Heating device, control method and battery production line

Abstract

The invention discloses a heating device, a control method and a battery production line, the heating device comprises a roller body and a heating assembly, the roller body is configured to support and convey a current collector, the current collector at least partially wraps the peripheral surface of the roller body, the heating assembly comprises an arc-shaped substrate, a heating piece and a reflecting cover, the arc-shaped substrate is matched with the roller body, and the reflecting cover is arranged on the arc-shaped substrate. An arc-shaped installation face is formed on the side, facing the roller body, of the arc-shaped base plate, the heating piece is arranged on the arc-shaped installation face, and the reflection cover is arranged between the heating piece and the arc-shaped base plate. According to the scheme provided by the invention, as the curvature of the arc-shaped mounting surface is matched with the curvature of the peripheral surface of the roller body, a uniform distance is kept between the heating element and the current collector wrapping the roller body, so that a non-film-coating area can be uniformly heated in the tape conveying direction, and the influence on the extension consistency of the non-film-coating area due to local overheating or insufficient heating is avoided.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a heating device, control method, and battery production line. Background Technology

[0002] In the cold pressing process of electrode sheets, due to the inconsistent thickness between the coated and uncoated areas, and the inherent thickness of the slurry in the coated area, only the coated area often expands after cold pressing, while the uncoated area is not subjected to roller pressure. This results in a difference in expansion between the coated and uncoated areas. To make the uncoated area expand, it is necessary to heat it using heating equipment.

[0003] In related technologies, hot pressing equipment experiences uneven heating temperatures during use, affecting the uniformity of stretching in non-coated areas. Summary of the Invention

[0004] In view of the above problems, this application provides a heating device, a control method and a battery production line, which can solve the problem that the heating temperature is uneven when the existing hot pressing equipment is used, which affects the uniformity of the non-coating area.

[0005] To address the aforementioned technical problems, this application proposes a heating device for heating the non-coated area on a current collector, comprising:

[0006] A roller body is configured to support and convey a current collector, the current collector at least partially covering the outer peripheral surface of the roller body; A heating assembly includes an arc-shaped substrate, a heating element, and a reflector. The arc-shaped substrate is adapted to the roller body. An arc-shaped mounting surface is formed on one side of the arc-shaped substrate facing the roller body. The heating element is disposed on the arc-shaped mounting surface. The curvature of the arc-shaped mounting surface is adapted to the curvature of the outer peripheral surface of the roller body, so that the distance between the heating element and the current collector wrapped on the roller body remains uniform. The reflector is disposed between the heating element and the arc-shaped substrate.

[0007] In the technical solution of this application embodiment, since the curvature of the arc-shaped mounting surface matches the curvature of the outer peripheral surface of the roller, a uniform distance is maintained between the heating element and the current collector wrapped on the roller. This ensures that the non-coated area is heated uniformly in the belt-carrying direction, avoiding the impact on the uniformity of the non-coated area's extension due to local overheating or insufficient heating. At the same time, the arc-shaped mounting surface can reduce the heat loss of the heating element to the surrounding area, so that the energy is more concentrated on the non-coated area, improving the energy utilization rate.

[0008] Meanwhile, the reflector can redirect the heat emitted by the heating element towards the curved substrate towards the current collector, reducing heat loss. Moreover, the reflector can block heat conduction to the curved substrate, reducing thermal shock and high-temperature damage to the curved substrate caused by the heating element, and preventing the curved substrate from deforming due to heat.

[0009] In some embodiments, heat dissipation channels are formed on the reflector.

[0010] In this way, during device operation, accumulated heat can be quickly dissipated through the heat dissipation channels, preventing the reflector from deforming due to prolonged high temperatures. Simultaneously, the heat dissipation channels can cool the environment surrounding the heating element, preventing heat buildup inside the heating components and thus avoiding excessive temperature rise. This keeps the heating element operating within a stable temperature range and improves the consistency of heating output.

[0011] In some embodiments, the heating device further includes an air-cooling component, which is connected to the heat dissipation channel.

[0012] In this way, by connecting the air-cooled components with the heat dissipation channels, forced convection heat dissipation is formed, which can quickly remove the heat accumulated inside the reflector and heating components.

[0013] In some embodiments, the heating assembly further includes a heat insulation layer disposed between the reflector and the arc-shaped substrate.

[0014] This prevents heat from being transferred to the curved substrate, thus avoiding deformation and damage to the curved substrate due to high temperatures.

[0015] In some embodiments, the heating assembly further includes a controller disposed on the arcuate substrate and electrically connected to the heating element, the controller being configured to adjust the output power of the heating element.

[0016] In this way, by adjusting the output power of the heating element in real time through the controller, the temperature heating requirements of different processes can be flexibly adapted.

[0017] In some embodiments, the radius of the arc-shaped substrate is adjustable.

[0018] In this way, by adjusting the radius of the arc-shaped substrate, it can be adapted to rollers of different diameters, effectively improving the overall adaptability of the device. At the same time, by adjusting the radius of the arc-shaped substrate, the heating element and the current collector wrapped on the roller can maintain a uniform distance, ensuring consistent heating distance and uniform heating when changing rollers or adjusting the process, thus guaranteeing heating stability.

[0019] In some embodiments, the heating device further includes a protective component electrically connected to the heating assembly, the protective component being configured to perform a safety protection action when the heating assembly malfunctions.

[0020] This effectively avoids safety hazards such as overheating and short circuits caused by abnormal operating conditions, and improves the overall safety of the device.

[0021] In some embodiments, the protective component includes at least one of an over-temperature protection unit, a leakage current protection unit, and an emergency braking unit; The over-temperature protection unit is configured to prevent the temperature of the heating component from exceeding a preset safety threshold; the leakage protection unit is configured to detect and cut off the leakage circuit of the heating component; and the emergency braking unit is configured to cut off the power supply to the heating component in an abnormal state.

[0022] In this way, through the triple protection units of over-temperature protection, leakage protection, and emergency braking, safety protection can be achieved from multiple dimensions such as temperature, electrical, and emergency conditions, thereby avoiding safety risks such as overheating, leakage, and loss of control.

[0023] In some embodiments, the roller body includes a roller, an induction heating power supply, and a first temperature detection element; The induction heating power supply is located inside the roller. The first temperature detection element is configured to detect the roller surface temperature and feed it back to the induction heating power supply. The induction heating power supply is configured to adjust its output power according to the roller surface temperature.

[0024] In this way, the roller surface temperature is detected in real time by the first temperature detection element and fed back to the induction heating power supply, forming a closed-loop temperature regulation to keep the roller surface temperature stable within the required range.

[0025] In some embodiments, the heating device further includes a second temperature detection element disposed downstream of the roller along the belt carrying direction, the second temperature detection element being electrically connected to the heating element and the induction heating power supply respectively; the second temperature detection element is configured to detect the temperature of the non-coated area.

[0026] In this way, the actual temperature of the non-coated area is detected by the second temperature detection element, and the heating element and the induction heating power supply can be adjusted in coordination according to the actual temperature to achieve precise matching of dual-sided heating.

[0027] In some embodiments, the radius of curvature of the arc-shaped mounting surface is R, and the radius of the roller body is r, where R = r + G, G is a constant radiation gap, and G is between 0.05r and 0.1r.

[0028] This ensures that a constant radiation gap G is maintained between the arc-shaped mounting surface and the current collector on the roller, guaranteeing that the spacing does not change during heating and that the non-coated areas on the current collector are heated uniformly.

[0029] This application also proposes a control method for a heating device, applied to any of the heating devices described in the embodiments of this application, the method comprising: When the heating component heats the non-coated area, the temperature signal of the heated non-coated area is collected; The output power of the heating components and the induction heating power supply on the roller is dynamically adjusted according to the temperature signal so that the temperature of the non-coated area is maintained within the preset temperature range.

[0030] In some embodiments, the method further includes: Acquire and store historical runtime data; The output power of the induction heating power supply on the heating components and rollers is dynamically adjusted based on the historical operating data.

[0031] In some embodiments, the method further includes: When the entire device is in a stopped state for a period of time exceeding the preset duration, the heating power supply is cut off.

[0032] This application also proposes a battery production line, including a heating device as described in any one of the embodiments of this application.

[0033] 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

[0034] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the embodiments described 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: Figure 1 This is a schematic diagram of the structure of a heating device provided in some embodiments of this application; Figure 2 Schematic diagram of a heating assembly provided for some embodiments of this application; Figure 3 Schematic diagrams of current collectors provided for some embodiments of this application; Figure 4 This is a schematic flowchart of a control method for a heating device provided in some embodiments of this application.

[0035] The reference numerals in the detailed embodiments are as follows: 10. Current collector; 101. Coated area; 102. Uncoated area; 11. Roller; 12. Heating assembly; 121. Curved substrate; 122. Heating element; 123. Reflector; 124. Insulation layer; 125. Controller; 13. Second temperature detection element. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0041] 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).

[0042] 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.

[0043] 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.

[0044] In the cold pressing process of electrode sheets, due to the inconsistent thickness between the coated and uncoated areas, and the inherent thickness of the slurry in the coated area, only the coated area often expands after cold pressing, while the uncoated area is not subjected to roller pressure. This results in a difference in expansion between the coated and uncoated areas. To make the uncoated area expand, it is necessary to heat it using heating equipment.

[0045] Most existing hot pressing equipment uses air heating. After the current collector is rolled, it passes through an air nozzle, which heats the non-coated area on the composite current collector. Due to the air heating temperature fluctuation of ±20℃, there are multiple influencing factors such as the shape of the air nozzle, temperature, air speed, and velocity, which can lead to uneven heating temperature and affect the uniformity of the non-coated area.

[0046] Based on the above considerations, in order to solve the problem of uneven heating temperature affecting the uniformity of non-coated areas during the use of existing hot pressing equipment, this application designs a heating device. The heating device includes a roller and a heating assembly. The roller is configured to support and transport a current collector, which at least partially covers the outer peripheral surface of the roller. The heating assembly includes an arc-shaped substrate, a heating element, and a reflector. The arc-shaped substrate is adapted to the roller, and an arc-shaped mounting surface is formed on the side of the arc-shaped substrate facing the roller. The heating element is disposed on the arc-shaped mounting surface, and the curvature of the arc-shaped mounting surface is adapted to the curvature of the outer peripheral surface of the roller to keep the distance between the heating element and the current collector wrapped on the roller uniform. The reflector is disposed between the heating element and the arc-shaped substrate.

[0047] In the technical solution of this application embodiment, since the curvature of the arc-shaped mounting surface matches the curvature of the outer peripheral surface of the roller, a uniform distance is maintained between the heating element and the current collector wrapped on the roller. This ensures that the non-coated area is heated uniformly in the belt-carrying direction, avoiding the impact of local overheating or insufficient heating on the uniformity of the non-coated area's extension. Simultaneously, the arc-shaped mounting surface reduces the heat loss from the heating element to the surrounding areas, allowing energy to be more concentrated on the non-coated area, improving energy utilization. Furthermore, the reflector can reflect the heat emitted by the heating element towards the arc-shaped substrate towards the current collector, reducing heat loss. Moreover, the reflector can block heat conduction to the arc-shaped substrate, reducing thermal shock and high-temperature damage to the arc-shaped substrate from the heating element, and preventing thermal deformation of the arc-shaped substrate.

[0048] According to some embodiments of this application, such as Figure 1 and combined Figure 2 As shown, this application provides a heating device for heating a non-coated area 102 on a current collector 10. The heating device includes a roller 11 and a heating assembly 12. The roller 11 is configured to support and transport the current collector 10, and the current collector 10 at least partially covers the outer peripheral surface of the roller 11. The heating assembly 12 includes an arc-shaped substrate 121 and a heating element 122. The arc-shaped substrate 121 forms an arc-shaped mounting surface on the side facing the roller 11. The heating element 122 is disposed on the arc-shaped mounting surface. The curvature of the arc-shaped mounting surface is adapted to the curvature of the outer peripheral surface of the roller 11 so that the distance between the heating element 122 and the current collector 10 wrapped on the roller 11 remains uniform. A reflector 123 is disposed between the heating element 122 and the arc-shaped substrate 121.

[0049] The current collector 10 in this embodiment is referenced. Figure 3 As shown, it includes a coated area 101 and an uncoated area 102. For details, please refer to the battery current collector structure, which will not be described in detail here.

[0050] In this embodiment, the roller 11 can be an electromagnetic induction heating roller, a drum, or other structures, and is not limited here.

[0051] In this embodiment, the heating component 12 can be an infrared emission source. The infrared emission source uses a high-density tungsten wire or carbon fiber heating element, which is arranged in an arc array on the arc mounting surface. The specific arrangement can be determined according to the actual situation, and this embodiment does not limit it.

[0052] like Figure 2 As shown, the arc-shaped substrate 121 in this embodiment can be made of aluminum alloy or ceramic material, and the heating element 122 can be an infrared emission source. The infrared emission source adopts a high-density tungsten wire or carbon fiber heating element, which is arranged on the arc-shaped substrate 121 in an arc array. This is not limited here.

[0053] In use, by setting the heating element 122 on the arc-shaped mounting surface and matching the curvature of the arc-shaped mounting surface with the outer circumferential surface of the roller body 11, it is possible to ensure that the distance between the heating element 122 and the collector 10 is uniform, so that the non-coated area 102 of the collector 10 is heated more uniformly and stably during the conveying process, avoiding local overheating or insufficient heating that would affect its elongation consistency.

[0054] In this embodiment, the reflector 123 can be made of aluminum alloy. The surface of the reflector 123 facing the heating element 122 can be coated with a 99.9% high-purity silver film to improve reflectivity.

[0055] The reflector 123 can be snapped onto the curved substrate 121, or it can be connected to the curved substrate 121 by bolts, which is not limited here.

[0056] In use, the reflector 123 can reflect the heat emitted by the heating element 122 toward the arc-shaped substrate 121 toward the current collector 10, reducing heat loss. Moreover, the reflector 123 can block heat conduction to the arc-shaped substrate 121, reducing thermal shock and high-temperature damage to the arc-shaped substrate 121 caused by the heating element 122, and preventing the arc-shaped substrate 121 from deforming due to heat.

[0057] In the technical solution of this application embodiment, since the curvature of the arc-shaped mounting surface matches the curvature of the outer peripheral surface of the roller 11, a uniform distance is maintained between the heating element and the current collector 10 wrapped on the roller 11. This ensures that the non-coated area 102 is heated uniformly in the belt conveyor direction, avoiding the impact on the uniformity of the non-coated area 102's extension due to local overheating or insufficient heating. At the same time, the arc-shaped mounting surface can reduce the heat loss of the heating element to the surrounding area, so that the energy is more concentrated on the non-coated area 102, improving the energy utilization rate.

[0058] According to some embodiments of this application, a heat dissipation channel is formed on the reflector 123.

[0059] In this embodiment, multiple heat dissipation channels can be formed on the reflector 123, and the multiple heat dissipation channels are evenly distributed, which is not limited here.

[0060] During device operation, the heat dissipation channel can quickly dissipate accumulated heat, preventing the reflector 123 from deforming due to prolonged high temperatures. Simultaneously, the heat dissipation channel can cool the environment surrounding the heat-generating component 122, preventing heat accumulation inside the heating element 12 and thus avoiding excessive temperature rise. This ensures the heat-generating component 122 operates within a stable temperature range, improving the consistency of heating output.

[0061] According to some embodiments of this application, the heating device further includes an air-cooling component, which is connected to a heat dissipation channel.

[0062] The air-cooling component in this embodiment can be a fan, air guide shroud, etc., and is not limited here.

[0063] During use, the air-cooled components are connected to the heat dissipation channel to form forced convection heat dissipation, which can quickly remove the heat accumulated inside the reflector 123 and the heating component 12.

[0064] According to some embodiments of this application, such as Figure 2 As shown, the heating assembly 12 also includes a heat insulation layer 124, which is disposed between the reflector 123 and the arc-shaped substrate 121.

[0065] In this embodiment, the insulation layer 124 can be glass wool, aluminum silicate fiber wool, ceramic fiber board, rock wool, etc., and there is no limitation here.

[0066] During use, the heat insulation layer 124 can prevent heat from being transferred to the arc-shaped substrate 121, thus avoiding deformation and damage to the arc-shaped substrate 121 due to high temperature.

[0067] According to some embodiments of this application, such as Figure 1 As shown, the heating assembly 12 also includes a controller 125, which is disposed on the arc-shaped substrate 121 and electrically connected to the heating element 122. The controller 125 is configured to adjust the output power of the heating element 122.

[0068] This embodiment may include multiple controllers 125, and the heating element 122 includes multiple infrared emitting sources, which are divided into two, three, or other independent units, with each unit connected to a controller. In this way, during use, the output power of the corresponding heating element 122 can be adjusted by the controller of the corresponding unit, thereby facilitating the control of the temperature of the corresponding unit.

[0069] According to some embodiments of this application, the radius of the arc-shaped substrate 121 is adjustable.

[0070] In this embodiment, the arc-shaped substrate 121 can adopt a multi-segment hinged structure, which includes multiple arc-shaped plate segments arranged sequentially along the circumference. Adjacent arc-shaped plate segments are rotatably connected by a hinge shaft to form a deformable arc-shaped mounting surface.

[0071] The radius adjustment principle of the arc-shaped substrate 121 is as follows: By changing the opening angle between multiple arc-shaped plate segments through external force, the overall curvature of the arc-shaped substrate 121 can be changed, thereby adjusting the radius of the arc-shaped substrate 121. For example, when it is necessary to adapt to a roller with a larger diameter, the opening angle between adjacent arc-shaped plate segments is increased, making the arc-shaped substrate 121 more gradual and increasing the radius; when it is necessary to adapt to a roller with a smaller diameter, the opening angle between adjacent arc-shaped plate segments is decreased, making the overall curvature of the arc-shaped substrate 121 more pronounced and decreasing the radius.

[0072] In this way, by adjusting the radius of the arc-shaped substrate 121, rollers 11 of different diameters can be adapted, effectively improving the overall adaptability of the device. At the same time, by adjusting the radius of the arc-shaped substrate 121, the heating element 122 and the current collector 10 wrapped around the roller 11 can maintain a uniform distance, ensuring consistent heating distance and uniform heating when changing rollers 11 or adjusting the process, thus guaranteeing heating stability.

[0073] According to some embodiments of this application, the heating device further includes a protective component electrically connected to the heating assembly 12, and the protective component is configured to perform a safety protection action when the heating assembly 12 malfunctions.

[0074] The protective components in this embodiment can be overheat protectors, circuit breakers, emergency stop buttons, etc., and are not limited here.

[0075] During use, the protective components can effectively prevent safety hazards such as overheating and short circuits caused by abnormal operating conditions, thus improving the overall safety of the device.

[0076] According to some embodiments of this application, the protection component includes at least one of an over-temperature protection unit, a leakage current protection unit, and an emergency braking unit; wherein, the over-temperature protection unit is configured to prevent the temperature of the heating component 12 from exceeding a preset safety threshold; the leakage current protection unit is configured to detect and cut off the leakage current circuit of the heating component 12; and the emergency braking unit is configured to cut off the power supply to the heating component 12 in an abnormal state.

[0077] The over-temperature protection unit in this embodiment may include a temperature sensor and an overheat protector. The temperature sensor is used to detect the real-time temperature of the heating component. When the real-time temperature exceeds a preset temperature threshold, the overheat protector cuts off the power supply to the heating component. The leakage current protection unit may include a leakage current detection module and a circuit breaker. The circuit breaker is used to automatically cut off the power when the leakage current exceeds the limit. The emergency braking unit may include an emergency stop button, which is linked to the power supply circuit of the heating component to achieve rapid emergency braking in abnormal conditions.

[0078] In this way, through the triple protection units of over-temperature protection, leakage protection, and emergency braking, safety protection can be achieved from multiple dimensions such as temperature, electrical, and emergency conditions, thereby avoiding safety risks such as overheating, leakage, and loss of control.

[0079] According to some embodiments of this application, the roller body 11 includes a roller, an induction heating power supply, and a first temperature detection element; wherein, the induction heating power supply is disposed inside the roller, the first temperature detection element is configured to detect the roller surface temperature and feed it back to the induction heating power supply, and the induction heating power supply is configured to adjust the output power according to the roller surface temperature.

[0080] In this embodiment, the first temperature detection element can be a temperature sensor, which is not limited here.

[0081] In this embodiment, the roller body is an electromagnetic induction heating roller, which mainly consists of a roller, an induction heating power supply, an induction coil, and a magnetic core. Its heating principle is based on the eddy current effect of electromagnetic induction, and the specific process is as follows: After the induction heating power supply is connected to the mains frequency AC power, the internal inverter circuit converts the mains frequency AC power into high frequency AC power. The high frequency AC power is input to the induction coil built into the roller. When the high frequency AC power is applied to the induction coil, a high frequency alternating magnetic field is generated around it. The magnetic field lines of the alternating magnetic field pass through the roller body to generate an induced current (i.e., eddy current). The eddy current flows at high speed inside the roller. Due to the resistance of the roller itself, according to Joule's law, a large amount of Joule heat is generated during the eddy current flow. At this time, the heat is directly generated inside the roller body. The heat generated inside the roller is transferred to the outer circumference of the roller through thermal conduction, causing the roller surface temperature to rise rapidly, thereby heating the non-coated area of ​​the current collector wrapped on the roller surface.

[0082] In this way, by detecting the roller surface temperature in real time through the first temperature detection element and feeding it back to the induction heating power supply, a closed-loop temperature regulation is formed, which can stabilize the roller surface temperature within the required range.

[0083] According to some embodiments of this application, the heating device further includes a second temperature detection element 13, which is disposed downstream of the roller 11 along the belt carrying direction. The second temperature detection element 13 is electrically connected to the heating element 122 and the induction heating power supply, respectively. The second temperature detection element 13 is configured to detect the temperature of the non-coated area 102.

[0084] In this embodiment, the second temperature detection element 13 can be a temperature sensor, which is not limited here.

[0085] In use, the second temperature detection element 13 detects the actual temperature of the non-coated area 102 and sends the detected actual temperature to the control processor. The control processor adjusts the heating element 122 and the induction heating power supply in coordination according to the actual temperature, thereby ensuring that the actual temperature of the non-coated area 102 is within the preset range, thus achieving precise matching of dual-sided heating.

[0086] According to some embodiments of this application, such as Figure 1 As shown, the radius of curvature of the arc-shaped mounting surface is R, and the radius of the roller body 11 is r, where R = r + G, G is a constant radiation gap, and G is between 0.05r and 0.1r.

[0087] In this way, a constant radiation gap G can be maintained between the arc-shaped mounting surface and the current collector 10 on the roller 11, ensuring that the spacing does not change during the heating process and that the non-coated area 102 on the current collector 10 is heated uniformly.

[0088] This application also proposes a control method for a heating device, applicable to any of the heating devices described in the embodiments of this application, such as... Figure 4 As shown, the method includes: Step 110: When the heating component heats the non-coated area, the temperature signal of the heated non-coated area 102 is collected; Step 120: Dynamically adjust the output power of the induction heating power supply on the heating component 12 and the roller 11 according to the temperature signal, so that the temperature of the non-coated area 102 is maintained within the preset temperature range.

[0089] In this way, by collecting the actual temperature signal of the non-coated area after heating, the output power of the heating element and the induction heating power supply on the heating component 12 can be adjusted in a targeted manner to achieve precise control of the temperature of the non-coated area and ensure that the temperature is stably maintained within the preset range.

[0090] Meanwhile, dynamic power adjustment based on actual temperature feedback can prevent the heating element and induction heating power supply on the heating component 12 from running at full power continuously. Under the premise of ensuring that the temperature meets the standard, it reduces ineffective energy consumption and achieves precise heat distribution, which not only improves the overall heating efficiency but also reduces operating costs.

[0091] According to some embodiments of this application, the method further includes: Acquire and store historical runtime data; The output power of the induction heating power supply on the heating component 12 and the roller 11 is dynamically adjusted based on historical operating data.

[0092] The historical operating data in this embodiment may include power parameters, temperature fluctuation patterns, environmental impact data, etc., corresponding to different current collector specifications, and is not limited here.

[0093] During use, the output power of the heating element and the induction heating power supply on the heating component is actively adjusted based on historical operating data. This avoids the lag of traditional feedback regulation, allowing the temperature of the non-coated area to approach the preset range more quickly, further improving the accuracy and stability of temperature control.

[0094] According to some embodiments of this application, the method further includes: When the entire device is in a stopped state for a period of time exceeding the preset duration, the heating power supply is cut off.

[0095] In this way, when the entire device stops operating and remains idle for more than the preset time, the heating power supply can be automatically cut off, thereby effectively avoiding safety hazards such as overheating and short circuits caused by the heating components (heating element, induction heating power supply) being accidentally started while idle, circuit faults, or human misoperation.

[0096] This application also proposes a battery production line, including a heating device as described in any of the embodiments of this application.

[0097] The heating device in this embodiment has the same structure as the above embodiments. Since the battery production line adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here.

[0098] 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. A heating device for heating a non-coated area on a current collector, characterized in that, include: A roller body is configured to support and convey a current collector, the current collector at least partially covering the outer peripheral surface of the roller body; A heating assembly includes an arc-shaped substrate, a heating element, and a reflector. The arc-shaped substrate is adapted to the roller body. An arc-shaped mounting surface is formed on one side of the arc-shaped substrate facing the roller body. The heating element is disposed on the arc-shaped mounting surface. The curvature of the arc-shaped mounting surface is adapted to the curvature of the outer peripheral surface of the roller body, so that the distance between the heating element and the current collector wrapped on the roller body remains uniform. The reflector is disposed between the heating element and the arc-shaped substrate.

2. The heating device according to claim 1, characterized in that, The reflector has heat dissipation channels formed on it.

3. The heating device according to claim 2, characterized in that, The heating device also includes an air-cooling component, which is connected to the heat dissipation channel.

4. The heating device according to claim 1, characterized in that, The heating component also includes a heat insulation layer, which is disposed between the reflector and the arc-shaped substrate.

5. The heating device according to claim 1, characterized in that, The heating assembly further includes a controller disposed on the arc-shaped substrate and electrically connected to the heating element, the controller being configured to adjust the output power of the heating element.

6. The heating device according to claim 1, characterized in that, The radius of the arc-shaped substrate is adjustable.

7. The heating device according to claim 1, characterized in that, The heating device also includes a protective component electrically connected to the heating assembly, and the protective component is configured to perform a safety protection action when the heating assembly malfunctions.

8. The heating device according to claim 7, characterized in that, The protective components include at least one of the following: an over-temperature protection unit, a leakage protection unit, and an emergency braking unit; The over-temperature protection unit is configured to prevent the temperature of the heating component from exceeding a preset safety threshold. The leakage protection unit is configured to detect and disconnect the leakage circuit of the heating component; the emergency braking unit is configured to disconnect the power supply to the heating component in an abnormal state.

9. The heating device according to claim 2, characterized in that, The roller body includes a roller cylinder, an induction heating power supply, and a first temperature detection element; The induction heating power supply is located inside the roller. The first temperature detection element is configured to detect the roller surface temperature and feed it back to the induction heating power supply. The induction heating power supply is configured to adjust the output power according to the roller surface temperature.

10. The heating device according to claim 9, characterized in that, The heating device further includes a second temperature detection element, which is disposed downstream of the roller body along the belt carrying direction. The second temperature detection element is electrically connected to the heating element and the induction heating power supply, respectively. The second temperature detection element is configured to detect the temperature of the non-coated area.

11. The heating device according to any one of claims 1 to 10, characterized in that, The radius of curvature of the arc-shaped mounting surface is R, and the radius of the roller body is r, where R = r + G, G is a constant radiation gap, and G is between 0.05r and 0.1r.

12. A control method for a heating device, applied to the heating device as described in any one of claims 1 to 11, characterized in that, The method includes: When the heating component heats the non-coated area, the temperature signal of the heated non-coated area is collected; The output power of the heating components and the induction heating power supply on the roller is dynamically adjusted according to the temperature signal so that the temperature of the non-coated area is maintained within the preset temperature range.

13. The control method according to claim 12, characterized in that, The method also includes: Acquire and store historical runtime data; The output power of the heating components and the induction heating power supply on the rollers is dynamically adjusted based on the historical operating data.

14. The control method according to claim 12, characterized in that, The method also includes: When the entire device is in a stopped state for a period of time exceeding the preset duration, the heating power supply is cut off.

15. A battery production line, characterized in that, Includes the heating device as described in any one of claims 1 to 11.

Images