Electromagnetic heating roller and lamination machine

Abstract

The utility model relates to an electromagnetic heating roller and a lamination machine, and relates to the field of battery manufacturing equipment. The utility model provides an electromagnetic heating roller. An electromagnetic heating assembly is arranged in a roller body; the supporting shaft penetrates through the roller body and is rotationally connected with the roller body. The supporting shaft is connected with the electromagnetic heating assembly and used for driving the electromagnetic heating assembly to rotate. The at least one temperature sensor is arranged in the roller body and is used for detecting the temperature of the roller body; the conductive slip ring sleeves the support shaft and is electrically connected with the temperature sensor; the control module is electrically connected with the electromagnetic heating assembly and the conductive slip ring. The roller body and the electromagnetic heating assembly are arranged, the roller body is heated according to the electromagnetic induction principle, the heating efficiency is high, and the surface temperature of the heated roller body is evenly distributed; by arranging the temperature sensor and the control module, the temperature of the roller body is controlled; by arranging the conductive slip ring, it is ensured that the temperature sensor can stably output temperature data when the roller body rotates, and the control module can stably output a control signal.

Description

Technical Field

[0001] The utility model relates to the field of battery manufacturing equipment, in particular to an electromagnetic heating roller and a laminating machine. Background Art

[0002] Currently, the stacking machines used in lithium-ion battery manufacturing primarily utilize two methods: a "Z"-shaped stacking machine and a thermal lamination stacking machine. In the thermal lamination stacking machine, the positive electrode sheet, negative electrode sheet, and separator are heated and pressed together using heated rollers to form a composite sheet. The uniformity of the heated roller surface temperature distribution directly impacts the thermal lamination of the composite sheet, making it a critical step in the battery manufacturing process and crucial for ensuring battery quality and performance.

[0003] The inventors discovered that conventional heated rollers use heating tubes as a heat source. When current passes through the internal heating tubes, they generate heat and transfer it to the roller surface through thermal conduction. However, the temperature uniformity of the roller surface is affected by the power and layout of the heating tubes, resulting in limited temperature uniformity and thermal efficiency, and uncontrolled temperature. Utility Model Content

[0004] The purpose of the utility model is to provide an electromagnetic heating roller and a laminating machine, which have uniform heating temperature, high heating efficiency and controllable heating temperature.

[0005] The embodiment of the present utility model is achieved as follows:

[0006] In the first aspect, the utility model proposes an electromagnetic heating roller, comprising: a roller body, an electromagnetic heating component, a support shaft, at least one temperature sensor, a conductive slip ring and a control module; the electromagnetic heating component is arranged in the roller body; the support shaft passes through the roller body and is rotatably connected to the roller body, and the support shaft is connected to the electromagnetic heating component; at least one temperature sensor is arranged in the roller body and is used to detect the temperature of the roller body; the conductive slip ring is sleeved on the support shaft and is electrically connected to the temperature sensor; the control module is electrically connected to the electromagnetic heating component and the conductive slip ring.

[0007] Optionally, the roller body includes a first cavity and at least one second cavity, the electromagnetic heating component is arranged in the first cavity, and the temperature sensor is arranged in the second cavity;

[0008] The support shaft passes through the roller body and the first cavity and is rotatably connected to the roller body.

[0009] Optionally, at least one second cavity is arranged at equal angles around the first cavity.

[0010] Optionally, the roller body includes a cylinder and a first end cover and a second end cover arranged at both ends of the cylinder, the second cavity is arranged on the cylinder, and the cylinder and the first end cover and the second end cover form a first cavity.

[0011] Optionally, the support shaft passes through the first end cover, the first cavity and the second end cover in sequence, and the support shaft is connected to the first end cover and the second end cover.

[0012] Optionally, a first bearing is provided on the first end cover, and a second bearing corresponding to the first bearing is provided on the second end cover;

[0013] The support shaft is sleeve-connected with the first bearing and the second bearing.

[0014] Optionally, the electromagnetic heating assembly includes a holder and an electromagnetic induction coil arranged around the holder;

[0015] The support shaft passes through the cage and is fixed to the cage.

[0016] Optionally, the electromagnetic induction coil is electrically connected to a control module, and the control module is used to output an alternating current to the electromagnetic induction coil and to control an output frequency of the alternating current.

[0017] Optionally, the electromagnetic heating roller further includes a driving structure, which is transmission-connected to the roller body and is used to drive the roller body to rotate.

[0018] In a second aspect, the present invention further provides a laminating machine comprising any one of the above-mentioned electromagnetic heating rollers.

[0019] The beneficial effects of the embodiments of the present utility model are:

[0020] This electromagnetic heating roller is provided with a roller body and an electromagnetic heating component, and utilizes the principle of electromagnetic induction to generate heat in the roller body, thereby reducing heat loss in the heat conduction process, having high heating efficiency, and the coil inside the roller body is evenly wound. After heating, the surface temperature distribution of the roller is more uniform, thereby greatly improving the thermal composite effect of the electromagnetic heating roller on the composite sheet; by providing a temperature sensor and a control module, the temperature sensor detects the internal temperature of the roller body and transmits the temperature data to the control module, and the control module controls the output frequency of the alternating current output to the electromagnetic heating group according to the received temperature data, thereby realizing the temperature control of the roller body; by providing a conductive slip ring, it is ensured that when the roller body rotates, the temperature sensor can stably output temperature data and the control module can stably output control signals; at the same time, it is simple to maintain and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic structural diagram of the roller body according to an embodiment of the utility model;

[0023] Figure 2 This is a schematic structural diagram of the electromagnetic heating roller according to an embodiment of the present utility model.

[0024] Icon: 010-electromagnetic heating roller; 100-roller body; 110-cylinder body; 120-first end cover; 121-first placement cavity; 130-second end cover; 131-second placement cavity; 132-slot; 140-first cavity; 150-second cavity; 160-first bearing; 170-second bearing; 200-electromagnetic heating assembly; 210-retaining frame; 220-electromagnetic induction coil; 300-support shaft; 400-temperature sensor; 500-conductive slip ring; 600-control module; 610-wire. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0030] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] Currently, the stacking machines used in lithium-ion battery manufacturing primarily utilize two methods: a "Z"-shaped stacking machine and a thermal lamination stacking machine. In the thermal lamination stacking machine, the positive electrode sheet, negative electrode sheet, and separator are heated and pressed together using heated rollers to form a composite sheet. The uniformity of the heated roller surface temperature distribution directly impacts the thermal lamination of the composite sheet, making it a critical step in the battery manufacturing process and crucial for ensuring battery quality and performance.

[0032] The inventors discovered that conventional heated rollers use heating tubes as a heat source. When current passes through the internal heating tubes, they generate heat and transfer it to the roller surface through thermal conduction. However, the temperature uniformity of the roller surface is affected by the power and layout of the heating tubes, resulting in limited temperature uniformity and thermal efficiency, and uncontrolled temperature.

[0033] Therefore, the present invention proposes a laminating machine including an electromagnetic heating roller 010 , wherein the surface temperature uniformity of the roller body 100 is good and the temperature of the roller body 100 is controllable, which greatly improves the thermal lamination effect of the electromagnetic heating roller 010 on the composite sheet.

[0034] Please refer to Figure 2 This embodiment provides an electromagnetic heating roller 010, including: a roller body 100, an electromagnetic heating component 200, a support shaft 300, at least one temperature sensor 400, a conductive slip ring 500 and a control module 600; the electromagnetic heating component 200 is arranged in the roller body 100; the support shaft 300 passes through the roller body 100 and is rotatably connected to the roller body 100, and the support shaft 300 is connected to the electromagnetic heating component 200; at least one temperature sensor 400 is arranged in the roller body 100 and is used to detect the temperature of the roller body 100; the conductive slip ring 500 is sleeved on the support shaft 300 and is electrically connected to the temperature sensor 400; the control module 600 is electrically connected to the electromagnetic heating component 200 and the conductive slip ring 500.

[0035] The control module 600 is used to output alternating current to the electromagnetic heating assembly 200 and to control the output frequency of the alternating current.

[0036] It can be understood that by setting up the roller body 100 and the electromagnetic heating component 200, the roller body 100 is heated by utilizing the principle of electromagnetic induction, thereby reducing heat loss during heat conduction, achieving high heating efficiency, uniform winding of the coil inside the roller, and better uniformity of temperature distribution on the surface of the roller after heating, thereby greatly improving the thermal composite effect of the electromagnetic heating roller 010 on the composite sheet; by setting up the temperature sensor 400 and the control module 600, the temperature sensor 400 detects the internal temperature of the roller body 100 and transmits the temperature data to the control module 600, and the control module 600 controls the output frequency of the alternating current output to the electromagnetic heating group according to the received temperature data, thereby realizing the control of the temperature of the roller body 100; by setting up the conductive slip ring 500, it is ensured that when the roller body 100 rotates, the temperature sensor 400 can stably output temperature data, and the control module 600 can stably output control signals.

[0037] Please refer to Figure 1 In this embodiment, the electromagnetic heating roller 010 includes a roller body 100 .

[0038] In this embodiment, please refer to Figure 1 The roller body 100 includes a first cavity 140 and at least one second cavity 150; the electromagnetic heating component 200 is arranged in the first cavity 140, and the temperature sensor 400 is arranged in the second cavity 150; the support shaft 300 passes through the roller body 100 and the first cavity 140 and is rotatably connected to the roller body 100, one end of the support shaft 300 is connected to the roller body 100 and is used to support the retaining frame 210, and the other end of the support shaft 300 is fixedly connected to the frame of the stacking machine.

[0039] Optionally, at least one second cavity 150 is arranged at equal angles around the first cavity 140. In this embodiment, the number of the second cavities 150 is two. In other embodiments, the number of the second cavities 150 can also be one, three, four, etc.

[0040] In this embodiment, the roller body 100 is a split structure, comprising a cylindrical body 110 and a first end cap 120 and a second end cap 130 disposed at each end of the cylindrical body 110. The cylindrical body 110 is cylindrical and has a through cavity for accommodating the electromagnetic heating assembly 200. The cylindrical body 110 is provided with two second cavities 150 for accommodating the temperature sensor 400. The second cavities 150 are disposed outside the first cavity 140 and are arranged at equal angles around the center of the cylindrical body 110. The inner end surface of the first end cap 120 is provided with a first receiving cavity 121 for securing the first bearing 160. The inner end surface of the second end cap 130 is provided with a second receiving cavity 131 and a slot 132 coaxially disposed with the second cavity 150. The second receiving cavity 131 is used to secure the second bearing 170, while the slot 132 is used to support the shaft 300 passing through the second end cap.

[0041] Among them, the cylinder 110 is connected and fixed to the inner end surface of the first end cover 120 and the inner end surface of the second end cover 130, so that the first placement cavity 121 and the second placement cavity 131 and the cylinder 110 together form the first cavity 140, and the first placement cavity 121 and the second placement cavity 131 are coaxially arranged with the first cavity 140.

[0042] It can be understood that one end of the roller body 100 is rotatably connected to the support shaft 300 through the first bearing 160 and the second bearing 170; the other end of the roller body 100 is transmission-connected to the output end of the driving structure, and the driving structure drives the roller body 100 to rotate, so that the roller body 100 can rotate relative to the electromagnetic heating component 200 and rotate the processed composite sheet at the same time.

[0043] Of course, in an optional embodiment, the roller body 100 may also include a cylinder with grooves and an end cover connected to the cylinder.

[0044] In this embodiment, the first bearing 160 and the second bearing 170 may be high-temperature resistant bearings.

[0045] In this embodiment, the roller body 100 is made of metal.

[0046] Please refer to Figure 2 In this embodiment, the electromagnetic heating roller 010 includes an electromagnetic heating assembly 200 .

[0047] In this embodiment, the electromagnetic heating assembly 200 includes a holder 210 and an electromagnetic induction coil 220 disposed around the holder 210 ; the support shaft 300 passes through the holder 210 and is fixed to the holder 210 .

[0048] The electromagnetic induction coil 220 is electrically connected to the control module 600 , and the control module 600 is used to output an alternating current to the electromagnetic induction coil 220 and to control the output frequency of the alternating current.

[0049] As can be understood, when alternating current is passed through the electromagnetic induction coil 220 and the electromagnetic heating assembly 200 is energized, a rapidly changing magnetic field is generated. When the magnetic lines of force of this magnetic field pass through the metal roller 100, numerous small eddy currents are generated within the roller 100. Due to the inherent resistance of the metal material of the roller 100, a large amount of heat energy is generated, causing the roller 100 to rapidly heat itself. Because the electromagnetic induction coil 220 disposed within the roller 100 is evenly wound, the surface temperature distribution of the roller 100 is more uniform after heating.

[0050] Please refer to Figure 2 In this embodiment, the electromagnetic heating roller 010 includes a support shaft 300 .

[0051] In this embodiment, the support shaft 300 passes through the slot 132 of the second end cover 130 and passes through the second bearing 170, the retaining frame 210 and the first bearing 160 in sequence; the support shaft 300 is used to support the retaining frame 210, and the support shaft 300 passes through the second end cover 130 and is fixed to the retaining frame 210; wherein, the two ends of the support shaft 300 are respectively connected to the second bearing 170 and the first bearing 160, so that the roller body 100 can rotate relative to the electromagnetic heating assembly 200 under the drive of the driving structure.

[0052] In this embodiment, the electromagnetic heating roller 010 includes a driving structure (not shown).

[0053] The drive structure is in transmission connection with the first end cap 120 of the roller 100 and is used to drive the roller 100 to rotate, allowing the roller 100 to rotate relative to the electromagnetic heating assembly 200. When an alternating current is passed through the electromagnetic heating assembly 200 to generate a rapidly changing magnetic field, the roller 100 rotates and cuts through the magnetic lines of force of the magnetic field, causing the roller 100 to heat itself quickly and evenly.

[0054] Please refer to Figure 2 In this embodiment, the electromagnetic heating roller 010 includes a temperature sensor 400 .

[0055] In this embodiment, there are two temperature sensors 400, one disposed in each of the two second cavities 150. The temperature sensor 400 is electrically connected to the control module 600 via a conductive slip ring 500. The temperature sensor 400 detects the temperature of the roller 100 and transmits the detected temperature data signal to the control module 600.

[0056] In this embodiment, the temperature sensor 400 is a probe-type temperature sensor 400 .

[0057] Please refer to Figure 2 In this embodiment, the electromagnetic heating roller 010 includes a control module 600 .

[0058] The control module 600 is electrically connected to the electromagnetic induction coil 220 of the electromagnetic heating assembly 200 and the conductive slip ring 500 . The control module 600 is used to output an alternating current to the electromagnetic induction coil 220 and to control the output frequency of the alternating current.

[0059] It is understandable that the control module 600 receives the temperature data signal detected by the temperature sensor 400 and controls the output frequency of the alternating current output to the electromagnetic induction coil 220 according to the temperature data signal, thereby achieving the purpose of controlling the temperature of the roller body 100.

[0060] Please refer to Figure 2 In this embodiment, the electromagnetic heating roller 010 includes a conductive slip ring 500 .

[0061] In this embodiment, the conductive slip ring 500 is sleeved on the support shaft 300, and a wire groove is opened on the support shaft 300. The control module 600 is electrically connected to the conductive slip ring 500 through the wire groove via a wire 610. The conductive slip ring 500 is also connected to the temperature sensor 400 through the wire 610.

[0062] It is understood that when the drive structure drives the roller body 100 to rotate, the roller body 100 also drives the conductive slip ring 500 to rotate. The temperature sensor 400 detects the temperature inside the roller body 100 in real time. The temperature sensor 400 is connected to the conductive slip ring 500 via a wire 610. Even when the roller body 100 is rotating, the temperature sensor 400 can still stably transmit temperature data signals and control signals to the control module 600, adjusting the frequency output of the control module 600, thereby achieving precise control of the temperature of the roller body 100.

[0063] The working principle of the electromagnetic heating roller 010 proposed in this embodiment is:

[0064] The control module 600 supplies alternating current to the electromagnetic heating assembly 200 via a wire 610, generating a rapidly changing magnetic field. The drive mechanism then rotates the roller 100 relative to the electromagnetic induction coil 220 on the support shaft 300. When the metal roller 100 passes through the magnetic field's lines of force, numerous small eddy currents are generated within the roller 100. Due to the inherent electrical resistance of the metal material, a large amount of heat is generated, rapidly heating the roller 100. After heating, the surface temperature of the roller 100 is evenly distributed.

[0065] The temperature sensor 400 detects the temperature inside the roller body 100 in real time. The temperature sensor 400 is connected to the conductive slip ring 500 via a wire 610. When the roller body 100 rotates, the temperature sensor 400 can still stably transmit temperature data signals and control signals to the control module 600; the control module 600 adjusts the frequency of the alternating current output to the electromagnetic induction coil 220 based on the temperature data signal, thereby achieving precise control of the temperature of the roller body 100.

[0066] In summary, the electromagnetic heating roller 010 proposed in the present invention, by setting a roller body 100 and an electromagnetic heating component 200, uses the principle of electromagnetic induction to make the roller body 100 heat up, reduces heat loss in the heat conduction process, has high heating efficiency, and the coil inside the roller is evenly wound. After heating, the surface temperature distribution of the roller body 100 is more uniform, thereby greatly improving the thermal composite effect of the electromagnetic heating roller 010 on the composite sheet; by setting a temperature sensor 400 and a control module 600, the temperature sensor 400 detects the internal temperature of the roller body 100 and transmits the temperature data to the control module 600, and the control module 600 controls the output frequency of the alternating current output to the electromagnetic heating group according to the received temperature data, thereby realizing the control of the temperature of the roller body 100; by setting a conductive slip ring 500, it is ensured that when the roller body 100 rotates, the temperature sensor 400 can stably output temperature data and the control module 600 can stably output control signals; at the same time, it is simple to maintain and has a long service life.

[0067] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An electromagnetic heating roller, characterized in that: include: Roller body; An electromagnetic heating component is disposed inside the roller body; A support shaft, the support shaft passing through the roller body and being rotatably connected to the roller body, the support shaft being connected to the electromagnetic heating assembly; at least one temperature sensor, at least one of the temperature sensors being disposed within the roller body and configured to detect a temperature of the roller body; a conductive slip ring, the conductive slip ring being sleeved on the support shaft and electrically connected to the temperature sensor; A control module is electrically connected to the electromagnetic heating component and the conductive slip ring.

2. The electromagnetic heating roller according to claim 1, characterized in that The roller body includes a first cavity and at least one second cavity, the electromagnetic heating component is arranged in the first cavity, and the temperature sensor is arranged in the second cavity; The support shaft passes through the roller body and the first cavity and is rotatably connected to the roller body.

3. The electromagnetic heating roller according to claim 2, characterized in that: At least one of the second cavities is arranged around the first cavity at an equal angle.

4. The electromagnetic heating roller according to claim 2, characterized in that The roller body includes a cylinder and a first end cover and a second end cover provided at both ends of the cylinder. The second cavity is provided on the cylinder. The cylinder, the first end cover and the second end cover form the first cavity.

5. The electromagnetic heating roller according to claim 4, characterized in that The support shaft passes through the first end cover, the first cavity and the second end cover in sequence, and the support shaft is connected to the first end cover and the second end cover.

6. The electromagnetic heating roller according to claim 5, characterized in that The first end cover is provided with a first bearing, and the second end cover is provided with a second bearing corresponding to the first bearing; The support shaft is sleeved with the first bearing and the second bearing.

7. The electromagnetic heating roller according to claim 1, characterized in that The electromagnetic heating assembly includes a holder and an electromagnetic induction coil arranged around the holder; The support shaft passes through the retaining frame and is fixed to the retaining frame.

8. The electromagnetic heating roller according to claim 7, characterized in that The electromagnetic induction coil is electrically connected to the control module, and the control module is used to output an alternating current to the electromagnetic induction coil and to control the output frequency of the alternating current.

9. The electromagnetic heating roller according to claim 1, characterized in that The electromagnetic heating roller further includes a driving structure, which is transmission-connected to the roller body and is used to drive the roller body to rotate.

10. A laminating machine, characterized in that: The electromagnetic heating roller comprises the electromagnetic heating roller according to any one of claims 1 to 9.

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