Electromagnetic roller for heating pole piece and foil through magnetic field induction

Abstract

The invention discloses an electromagnetic roller for heating pole pieces and foils through magnetic field induction, and belongs to the technical field of new energy magnetic field induction workpiece heating. The electromagnetic roller comprises a non-metal outer roller, a magnetic core fixing tool, a middle shaft, a magnetic core and an induction coil, the two ends of the middle shaft are installed in an inner cavity of the non-metal outer roller in a supported mode through a first bearing and a second bearing respectively, an installation space for installing the magnetic core is formed between the middle shaft and the non-metal outer roller, and a heating section on the induction coil is clamped into the magnetic core. The heating section and the magnetic core form a semi-ring-shaped structure and are sleeved in the mounting space through a magnetic core fixing tool which is matched with the semi-ring-shaped structure to form a ring-shaped structure; the first connecting block and the second connecting block are connected with the connecting block screw to energize and water the electromagnetic roller to generate a magnetic field to heat the workpiece. The electromagnetic roller magnetic field induction heating structure is used for conducting induction heating on the heating area where the pole piece or the foil is attached to the non-metal outer roller, the temperature of the electromagnetic roller cannot rise during heating, heat loss is reduced, heating efficiency is improved, and the heating effect is ensured when a workpiece rapidly moves.

Description

Technical Field

[0001] The invention belongs to the technical field of new energy magnetic field induction workpiece heating, and in particular relates to an electromagnetic roller for heating pole pieces and foils through magnetic field induction. Background Art

[0002] The invention patent with patent number 201921357007.3 discloses an electromagnetic heating roller air cooling structure, in which an electromagnetic induction coil is built into the roller to induction heat the outer roller, and the heat is transferred to the workpiece on the roller by heat conduction to heat it. There are openings at both ends of the roller, and the inside of the roller is cooled by high-pressure gas. In this design, the electromagnetic induction coil heats the roller, and then transfers the heat to the workpiece by heat conduction. The useful heat loss is too excessive and the efficiency is low. The heating effect is not ideal when the workpiece moves quickly. At the same time, the electromagnetic induction coil cannot directly heat the workpiece above the roller, which causes the temperature inside the roller to rise sharply. The temperature inside the roller is cooled by high-pressure gas, and the cooling efficiency is far inferior to liquid cooling.

[0003] The invention patent with patent number 202021911241.9 discloses an electromagnetic roller heat-conducting structure, in which an induction coil is fixed on the central axis inside the roller to heat the inner roller body, and then the heat of the inner roller body is transferred to the outer roller body by heat conduction, and finally transferred to the workpiece by heat conduction. The advantage of this is uniform heat transfer; in this design, the electromagnetic induction coil heats the inner roller body, and then transfers the heat to the outer roller body by heat conduction, and finally transfers it to the workpiece by heat conduction. There are two heat transfers in total, and the useful heat loss is too excessive and the efficiency is low. The heating effect is not ideal when the workpiece moves quickly.

[0004] Regarding the above-mentioned comparative documents, traditional heating methods often have problems such as uneven heating, high energy consumption, and slow heating speed. These problems directly or indirectly affect the performance and cost of new energy batteries. Summary of the invention

[0005] The purpose of the present invention is to provide an electromagnetic roller that heats pole pieces and foils through magnetic field induction, so as to solve the problem of how to increase the energy storage between the positive and negative pole pieces and foils in the manufacturing process of new energy batteries, and at the same time solve the problem of the bonding process and the pressing process of the positive and negative pole pieces and foils. The present invention uses the electromagnetic induction heating technology of the electromagnetic roller to achieve efficient and uniform heating of the pole pieces or foils. The present invention not only significantly improves the metal properties of the pole piece foil, such as improving the manufacturing process of the pole pieces of new energy batteries, and increasing the energy density stored between the pole pieces, but also increases production efficiency and product quality.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an electromagnetic roller for heating pole pieces and foils through magnetic field induction, the electromagnetic roller comprising a non-metallic outer roller, a magnetic core fixing tool, a central shaft, a magnetic core, and an induction coil, the two ends of the central shaft are respectively supported and installed in the inner cavity of the non-metallic outer roller through a first bearing and a second bearing, an installation space for installing the magnetic core is formed between the central shaft and the non-metallic outer roller, the induction coil comprises a heating section and an extension section, wherein the heating section is inserted into the magnetic core, the heating section and the magnetic core form a semi-annular structure and are inserted into the installation space through a magnetic core fixing tool that cooperates with the first connecting block and the second connecting block to form an annular structure; the electromagnetic roller is energized and watered through the connecting block screws to generate a magnetic field to heat the workpiece.

[0007] As a further technical solution of the present invention, the two ends of the electromagnetic roller are respectively supported by the first support block and the second support block, and the first support block is installed on the processing equipment body by the first non-metallic screw, and the second support block is installed by the second non-metallic screw.

[0008] As a further technical solution of the present invention, the outer ends of the first bearing and the second bearing are respectively provided with a first inner sleeve and a second inner sleeve, and the first inner sleeve and the second inner sleeve both have an extension portion extending into the inner ring surface of the bearing, and the first inner sleeve and the second inner sleeve are respectively in contact with the inner ring surfaces of the first bearing and the second bearing through their extension portions.

[0009] As a further technical solution of the present invention, the magnetic core fixing tool is fixedly installed on the threaded hole opened in the induction magnetic core fixing tool by a third non-metallic screw.

[0010] As a further technical solution of the present invention, the outer end of the first connecting block is provided with a connecting wire for connecting to a power source, and the connecting wire is led out through the first inner sleeve.

[0011] As a further technical solution of the present invention, the first connection block and the second connection block are attached to each other, and the external wires are symmetrically arranged on the first connection block.

[0012] The present invention can achieve the following beneficial effects: 1. The present invention forms an assembly by clamping a magnetic core onto an induction coil and placing it into a central shaft. A whole row of magnetic cores is fixed to the central shaft through a magnetic core fixing tool and forms a magnetic field induction heating structure. The heating area where the foil and the non-metallic outer roller are bonded is inductively heated by cooperating with the magnetic field induction heating structure. During the working process of the present invention, the overall electromagnetic roller will not heat up, which reduces heat loss, improves heating efficiency, and ensures the heating effect when the workpiece moves quickly. When the foil is in a bonded state with the electromagnetic heating roller, it is instantly heated during movement. Direct heating of the workpiece eliminates heat loss and improves heating efficiency. The electromagnetic induction coil of the present invention is made of a copper tube throughout, and a coolant passes through the inside. The liquid cooling efficiency is high, so that the temperature inside the roller is the same as normal temperature.

[0013] 2. The present invention achieves precise heating of the electrode foil by precisely controlling the distribution and intensity of the electromagnetic field, avoiding many disadvantages of traditional heating methods; at the same time, electromagnetic induction heating also has the advantages of high thermal efficiency, environmental protection and energy saving, which conforms to the current green and low-carbon manufacturing concept; it is of great significance to promote the sustainable development of the new energy battery industry; it not only improves the heating efficiency and reduces heat loss, but also improves the process flexibility and accuracy, and provides a new and efficient solution for the heating treatment of the positive and negative electrode foils of new energy batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure explosion of the present invention.

[0015] Figure 2 It is a structural schematic diagram of the magnetic core fixing tool of the present invention.

[0016] Figure 3 It is a schematic diagram of the assembly structure of the present invention.

[0017] Figure 4 It is a schematic diagram of the top structure of the present invention.

[0018] In the figure: 1. non-metallic outer roller; 2. first bearing; 3. second bearing; 4. first inner sleeve; 5. first non-metallic screw; 6. first support block; 7. first connecting block; 8. second connecting block; 9. connecting block screw; 10. external wire; 11. second inner sleeve; 12. second non-metallic screw; 13. second support block; 14. magnetic core fixing tool; 15. middle axis; 16. third non-metallic screw; 17. magnetic core; 18. heating section; 19. induction coil. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Please see attached Figure 1 -Attached Figure 3 The electromagnetic roller of this embodiment includes a non-metallic outer roller 1, a magnetic core fixing tool 14, a central axis 15, a magnetic core 17, and an induction coil 19. The two ends of the central axis 15 are supported and installed in the inner cavity of the non-metallic outer roller 1 through a first bearing 2 and a second bearing 3 respectively. The central axis 15 serves as the central support of the entire electromagnetic roller to improve the stability of the overall structure. An installation space for installing the magnetic core is formed between the central axis 15 and the non-metallic outer roller 1. The induction coil includes a heating section 18 and an extension section 19, wherein the heating section 18 is inserted into the magnetic core, and the heating section 18 and the magnetic core form a semi-annular structure and are inserted into the installation space by the magnetic core fixing tool 14 that cooperates with the magnetic core to form an annular structure; the connecting block screws 11 are connected through the first connecting block 7 and the second connecting block 8 to energize and water the electromagnetic roller so that it generates a magnetic field to heat the workpiece.

[0021] The two ends of the electromagnetic roller are supported by the support provided on the first support block 6 and the second support block 13, respectively. The first support block 6 is installed on the main body of the processing equipment through the first non-metallic screw 5, and the second support block 13 is installed on the main body of the processing equipment through the second non-metallic screw 12. The outer ends of the first bearing 2 and the second bearing 3 are respectively provided with the first inner sleeve 4 and the second inner sleeve 11, and the first inner sleeve and the second inner sleeve both have a protruding portion extending into the inner ring surface of the bearing, and the first inner sleeve 4 and the second inner sleeve 11 are respectively supported by the inner ring surface of the first bearing 2 and the second bearing 3 through their protruding portions. The magnetic core fixing tool is fixedly installed on the threaded hole 6 opened by the induction magnetic core fixing tool through the third non-metallic screw 16. The outer end of the first connecting block 7 is provided with a connecting wire for connecting the power supply, and the connecting wire is led out through the first inner sleeve 4. The first connecting block 7 and the second connecting block 8 are mutually attached, and the external wire 10 is symmetrically arranged on the first connecting block 7. The structure of the magnetic core fixing tool 14 is a fan-shaped structure with a cross section greater than 180 degrees. Specifically, preferably, the angle of the fan-shaped structure is selected to be 270 degrees. The magnetic core fixing fixture 14 is provided with an arc groove that matches the outer cylindrical surface of the central axis 15, and the central axis 15 is placed against the arc groove. Both sides of the magnetic core fixing fixture 14 are provided with embedding grooves 802 for pre-placing the magnetic core, thereby further improving the stability of the magnetic core and the induction coil. In addition, one end of the central axis 15 of this embodiment is a flat structure, and the other end has a large end with a diameter greater than the diameter of the central axis 15. The flat structure can accommodate the installation of the extension section, thereby better limiting and fixing the central axis 15.

[0022] During operation, the workpiece foil passes through the surface of the non-metallic outer roller 15, and the magnetic field induction heating structure induction heats the foil 16 and the heating area 16' where the non-metallic outer roller 15 is in contact, while the electromagnetic roller does not heat up. The heating area 16' of the pole piece or foil alone will not have any effect on the overall structure of the electromagnetic roller.

[0023] Specifically, firstly, a first bearing 2 and a second bearing 3 made of non-metallic material are installed at both ends of the non-metallic outer roller 1 as the main structure of the roller, and then a central axis 15 is inserted into the main structure and the first inner sleeve 4 and the second inner sleeve 11 are sleeved as support, the heating section 18 of the induction coil 19 is clamped with the magnetic core 17 and placed on the central axis 15, and at the same time, the magnetic core fixing tool 14 is installed on the central axis 15 through the third non-metallic screw 16 to fix a whole row of magnetic cores 17 to form a magnetic field induction heating structure, and after fixation, the electromagnetic roller is energized and watered through the external wires 10 on the first connecting block 7 and the second connecting block 8 to generate a magnetic field to heat the workpiece. During the process, the foil passes through the surface of the non-metallic outer roller 1, and the magnetic field induction heating structure cooperates to induction heat the heating area where the foil and the non-metallic outer roller 1 are bonded. During the process, the overall electromagnetic roller will not heat up, which reduces heat loss, improves heating efficiency, and ensures the heating effect when the workpiece moves quickly.

[0024] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electromagnetic roller for heating pole pieces and foils by magnetic field induction, characterized in that: The electromagnetic roller comprises a non-metallic outer roller (1), a magnetic core fixing tool (14), a central shaft (15), a magnetic core (17), and an induction coil (19). The two ends of the central shaft (15) are supported and installed in the inner cavity of the non-metallic outer roller (1) through a first bearing (2) and a second bearing (3), respectively. An installation space for installing the magnetic core (17) is formed between the central shaft (15) and the non-metallic outer roller (1). The induction coil comprises a heating section (18) and an extension section (19), wherein the heating section (18) is inserted into the magnetic core. (17), the heating section (18) and the magnetic core form a semi-annular structure and are inserted into the installation space through the magnetic core fixing tool (14) that cooperates with the magnetic core to form an annular structure; the electromagnetic roller is energized and water is passed through the first connecting block (7) and the second connecting block (8) to generate a magnetic field to heat the workpiece foil (16); the electromagnetic working method is that the workpiece foil passes through the surface of the non-metallic outer roller (15), and the magnetic field induction heating structure induction heats the heating area (16') where the workpiece foil (16) and the non-metallic outer roller (15) are in contact.

2. The electromagnetic roller for heating the pole piece and the foil by magnetic field induction according to claim 2, characterized in that: The two ends of the electromagnetic roller are respectively supported by a first support block (6) and a second support block (13); the first support block (6) is mounted on the processing equipment body via a first non-metallic screw (5), and the second support block (13) is mounted on the processing equipment body via a second non-metallic screw (12).

3. The electromagnetic roller for heating the pole piece and the foil by magnetic field induction according to claim 2, characterized in that: A first inner sleeve (4) and a second inner sleeve (11) are respectively arranged at the outer ends of the first bearing (2) and the second bearing (3); the first inner sleeve and the second inner sleeve both have a protruding portion extending into the inner ring surface of the bearing; the first inner sleeve (4) and the second inner sleeve (11) are respectively in contact with the inner ring surfaces of the first bearing (2) and the second bearing (3) through their protruding portions.

4. The electromagnetic roller for heating the pole piece and the foil by magnetic field induction according to claim 3, characterized in that: The magnetic core fixing tool is fixedly mounted on the threaded hole provided in the induction magnetic core fixing tool by means of a third non-metallic screw (16).

5. The electromagnetic roller for heating the pole piece and the foil by magnetic field induction according to claim 4, characterized in that: The outer end of the first connecting block (7) is provided with a connecting wire for connecting to a power source, and the connecting wire is led out through the first inner sleeve (4).

6. The electromagnetic roller for heating pole pieces and foils by magnetic field induction according to claim 5, characterized in that: The first connection block (7) and the second connection block (8) are fitted to each other, and the external wires (10) are symmetrically arranged on the first connection block (7).

7. The electromagnetic roller for heating the pole piece and the foil by magnetic field induction according to claim 6, characterized in that: The structure of the magnetic core fixing fixture (14) is a fan-shaped structure with a cross section greater than 180 degrees. The magnetic core fixing fixture (14) is provided with an arc-shaped groove that matches the outer cylindrical surface of the central axis (15), and the central axis (15) is placed in contact with the arc-shaped groove (801).

8. The electromagnetic roller for heating pole pieces and foils by magnetic field induction according to claim 7, characterized in that: Both sides of the magnetic core fixing tool (14) are provided with embedding grooves (802) for frontally placing the magnetic core.

9. The electromagnetic roller for heating pole pieces and foils by magnetic field induction according to claim 8, characterized in that: One end of the central axis (15) is in a flat structure, and the other end has a large end portion with a diameter greater than the diameter of the central axis (15).

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