Electric heating device
By designing an electric heating device including a shell and a heating assembly, and heating using a heat homogenizer and a heat conducting medium for heating, the problem of sintering or bubbles caused by direct contact with the slurry in the prior art is solved, and the uniformity of heating and the fluidity of the slurry are improved.
Patent Information
- Application Number
- CN202421312913.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-06-07
AI Technical Summary
When existing electrical heating devices heat the slurry, the heating element directly contacts the slurry, resulting in local high temperatures, which may cause the slurry to sinter or bubbles.
An electric heating device is designed, including a shell and a heating assembly, an installation cavity is set up in the shell, and a heating assembly and a slurry flow channel are set up in the installation cavity. The heating assembly consists of a heat homogenizer and a heating member. The heat homogenizer is made of a thermally conductive material, and there is a heat homogenizer and a buffer chamber inside. The heat conducting medium is heated in the heat homogenizer, and heat is transferred to the slurry through the heat homogenizer.
By setting the heat homogenizer and the heat conducting medium, the heating element is prevented from directly contacting the slurry, achieving uniformity of heating, avoiding slurry sintering or bubbles, and at the same time improving the fluidity of the slurry. It is suitable for coating processes and other processes that require slurry to heat up.
Smart Images
Figure CN222872602U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric heating equipment, in particular to an electric heating device. Background Art
[0002] Coating is one of the key processes in the production of lithium battery pole pieces. The main purpose of this process is to evenly coat the slurry with good stability, good viscosity and good fluidity on the positive and negative current collectors. The higher the content of active substances in the slurry, the thicker the coating on the current collector. When the coating thickness is constant, increasing the solid content of the slurry can shorten the time required to enter the oven, shorten the oven length, and reduce energy consumption.
[0003] After the solid content is increased, the fluidity of the slurry needs to be improved. At present, the fluidity of the slurry is improved by heating the slurry. Generally, electric heating is used to directly heat the slurry. Although the electric heating pipe heater has high thermal efficiency, the part of the heating element that directly contacts the slurry will produce local high temperature, causing the slurry to sinter or generate bubbles.
[0004] Therefore, it is necessary to design an electric heating device to solve the above problems. Utility Model Content
[0005] The utility model aims to provide an electric heating device which can heat evenly and avoid slurry sintering or bubble generation.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] An electric heating device comprises: a housing having an installation cavity, wherein the installation cavity has a feed inlet and a discharge outlet;
[0008] A heating component is arranged in the installation cavity, a slurry flow channel is provided between the heating component and the shell, and the slurry flow channel is communicated with both the feed port and the discharge port;
[0009] The heating component includes a heat-scaling member and a heating member. The heat-scaling member is made of a heat-conducting material. A heat-scaling cavity is provided inside the heat-scaling member. The heating member is arranged in the heat-scaling cavity. A heat-conducting medium is provided in the heat-scaling cavity. The heating member is used to heat the heat-conducting medium.
[0010] Optionally, a side wall of the shell opposite to the slurry flow channel has a sandwich structure, and the sandwich structure is filled with a heat-insulating medium.
[0011] Optionally, the heat-scaling member further includes a buffer chamber communicated with the heat-scaling chamber to accommodate the heat-conducting medium that expands due to heat.
[0012] Optionally, a pressure relief member is provided on the buffer chamber.
[0013] Optionally, a filling piece is provided in the slurry flow channel.
[0014] Optionally, the filler has an inclined surface in contact with the slurry.
[0015] Optionally, the shell and the heat spreader are both tubular structures, and the shell and the heat spreader are coaxially arranged.
[0016] Optionally, the shell is vertically arranged, the feed port is arranged at the lower part of the installation cavity, and the discharge port is arranged at the upper part of the installation cavity.
[0017] Optionally, it further includes: a temperature detection component, which is arranged at the discharge port and is used to detect the temperature of the slurry after heating.
[0018] Optionally, it further includes: a controller, wherein the controller is electrically connected to the temperature detecting element and the heating element.
[0019] Compared with the prior art, the technical solution of the utility model has the following advantages:
[0020] The electric heating device provided by the utility model comprises a shell and a heating component, the heating component is arranged in the installation cavity of the shell, a slurry flow channel is provided between the heating component and the shell, the slurry flow channel is connected with the feed port and the discharge port, the heating component comprises a heat-saturating element and a heating element, the heat-saturating element is made of a heat-conducting material, a heat-saturating cavity is provided inside the heat-saturating element, the heating element is arranged in the heat-saturating cavity, and heats the heat-conducting medium in the heat-saturating cavity;
[0021] By setting up the heat-sparging member and the heat-conducting medium, the heating element will not directly contact the slurry. For the heating of the slurry, the heat is transferred to the slurry through the heat-conducting medium and the heat-sparging member, and the heating is uniform, thus avoiding slurry sintering or bubble generation. By increasing the temperature of the slurry, the viscosity of the slurry is reduced, and the fluidity of the slurry is increased, which is beneficial to the transportation and coating of the slurry. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 A schematic structural diagram of an implementation of an electric heating device provided in an embodiment of the utility model;
[0024] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure in;
[0025] Figure 3 for Figure 2 A local enlarged schematic diagram in FIG.
[0026] Figure 4 for Figure 2 A schematic diagram of the structure of the heat-sparging member;
[0027] Figure 5 for Figure 2 A schematic structural diagram of the first shell in FIG.
[0028] Description of reference numerals:
[0029] 1. Shell; 2. Feed inlet; 3. Discharge outlet; 4. Heating component; 5. Slurry flow channel; 6. Heat-saturating element; 7. Heating element; 8. Heat-saturating chamber; 9. Sandwich structure; 10. Buffer chamber; 11. Pressure relief element; 12. Filling element; 13. Inclined surface; 14. Temperature detection element; 15. First shell; 16. Second shell; 17. Mounting plate. DETAILED DESCRIPTION
[0030] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0034] The electric heating device provided in this embodiment is suitable for use in a coating process or other processes that require slurry heating to increase the slurry temperature and the fluidity of the slurry.
[0035] like Figures 1 to 3 As shown, a specific implementation of the electric heating device provided in this embodiment includes a shell 1 and a heating component 4, the shell 1 has an installation cavity, and the installation cavity has a feed port 2 and a discharge port 3; the heating component 4 is arranged in the installation cavity, and a slurry flow channel 5 is provided between the heating component 4 and the shell 1, and the slurry flow channel 5 is connected with the feed port 2 and the discharge port 3; the heating component 4 includes a heat equalizing member 6 and a heating member 7, the heat equalizing member 6 is made of a heat-conducting material, and the heat equalizing member 6 has a heat equalizing cavity 8 inside, the heating member 7 is arranged in the heat equalizing cavity 8, and a heat-conducting medium is provided in the heat equalizing cavity 8, and the heating member 7 is used to heat the heat-conducting medium.
[0036] By setting up the heat-averaging element 6 and the heat-conducting medium, the heating element 7 will not directly contact the slurry. For the heating of the slurry, the heat is transferred to the slurry through the heat-conducting medium and the heat-averaging element 6, and the heating is uniform, which avoids sintering of the slurry or the generation of bubbles; by increasing the temperature of the slurry, the viscosity of the slurry is reduced, and the fluidity of the slurry is increased, which is beneficial to the transportation and coating of the slurry.
[0037] like Figure 1 and Figure 2 As shown, in this embodiment, the shell 1 and the heat equalizer 6 are both tube structures, and the shell 1 and the heat equalizer 6 are coaxially arranged, so that the cross-sectional size at each position of the slurry flow channel 5 is the same, further ensuring the uniformity of heating, and the structure is the most compact. In other embodiments, the shell 1 is a rectangular shell structure, and a plurality of heat equalizers 6 are arranged evenly distributed inside the shell 1 to heat the slurry synchronously.
[0038] like Figure 2 As shown, in this embodiment, the shell 1 is vertically arranged, the feed port 2 is arranged at the lower part of the installation cavity, and the discharge port 3 is arranged at the upper part of the installation cavity. The slurry is transported from the bottom to the top, and the slurry can be filled in the slurry flow channel 5 to ensure the heating effect.
[0039] Specifically, the top of the shell 1 is open, the heating component 4 is installed at the open end of the shell 1, and the heat equalizing member 6 extends into the installation cavity inside the shell 1. The discharge port 3 is arranged on the side wall of the upper part of the shell 1, and the feed port 2 of the shell 1 is arranged at the lower end. The axis of the feed port 2 coincides with the axis of the shell 1. The feed port 2 of the shell 1 is in a closed shape, which reduces the rising resistance of the slurry. The lower end of the heat equalizing member 6 is also in a closed shape, also for facilitating the flow of the slurry.
[0040] Specifically, the housing 1 is a split structure. In this embodiment, the housing 1 is divided into a first housing 15 and a second housing 16. The first housing 15 and the second housing 16 are sealed and connected by a clamp. The second housing 16 is arranged at the lower part of the first housing 15. The feed port 2 is arranged on the second housing 16. The heating component 4 and the first housing 15 are sealed and connected by a clamp. In other embodiments, the housing 1 is an integrated structure.
[0041] Specifically, the heating element 7 is a heating tube or a heating rod, and the heat transfer medium is heat transfer oil. In the present embodiment, there are multiple heating elements 7, and a stabilizing plate is arranged in the middle of the multiple heating elements 7 to prevent the instability of the longer heating elements 7. The heat equalizing element 6 is an open structure at one end, and a mounting plate 17 is installed at the open end. The mounting plate 17 and the heat equalizing element 6 are sealed and connected by a clamp, and the heating element 7 is fixed on the mounting plate 17. In other embodiments, there is one heating tube, and the heating element 7 and the mounting plate 17 are threadedly connected.
[0042] like Figure 2 and Figure 3 As shown, the electric heating device provided in this example has a sandwich structure 9 on the side wall of the housing 1 opposite to the slurry flow channel 5, and the sandwich structure 9 is filled with a heat-insulating medium. The sandwich structure 9 and the heat-insulating medium are provided to insulate the slurry to prevent the slurry from exchanging heat with the external environment and affecting the heating efficiency of the slurry. Specifically, in this embodiment, the heat-insulating medium is air, and in other embodiments, the heat-insulating medium is a silicate material, a polyurethane material, etc.
[0043] Specifically, in this embodiment, Figure 5 As shown, the sandwich structure 9 is only provided on the first shell 15 , and the sandwich structure 9 is an annular cavity structure. In other embodiments, the sandwich structure 9 is provided on both the first shell 15 and the second shell 16 .
[0044] like Figure 2 and Figure 4 As shown, in the electric heating device provided in this example, the heat equalizing element 6 also includes a buffer chamber 10 connected to the heat equalizing chamber 8 to accommodate the heat-conducting medium that expands due to heat, so as to prevent the heat-conducting medium from exerting a greater pressure on the heat equalizing element 6 after the heat expansion, thereby damaging the heat equalizing element 6.
[0045] Specifically, in this embodiment, the buffer chamber 10 is disposed above the heat-averaging chamber 8 , and the diameter of the buffer chamber 10 is larger than the diameter of the heat-averaging chamber 8 , so as to more safely accommodate the expanded heat-conducting medium.
[0046] like Figure 2 As shown, in the electric heating device provided in this example, a pressure relief member 11 is provided on the buffer chamber 10. When the gas pressure inside the heat equalizing member 6 is relatively high, the pressure relief member 11 is pushed open by the gas pressure to discharge the excess gas, thereby avoiding damage to the heat equalizing member 6. Specifically, the pressure relief member 11 is a pressure relief valve, and a threaded hole is provided on the side wall of the buffer chamber 10, and the pressure relief valve is installed in the threaded hole. The heat conducting medium is at a relatively long distance from the pressure relief member 11, and the heat conducting medium will not flow out of the pressure relief member 11.
[0047] like Figure 2 and Figure 4 As shown, in the electric heating device provided in this example, a filling piece 12 is provided in the slurry flow channel 5 to fill the space in the slurry flow channel 5 where the slurry cannot flow, so as to prevent the residual air in the slurry flow channel 5 from mixing into the slurry and causing bubbles in the slurry.
[0048] Specifically, in this embodiment, the filler 12 is fixedly arranged on the side wall of the heat equalizer 6, and enters the installation cavity synchronously with the heat equalizer 6, and the side wall of the filler 12 and the side wall of the installation cavity are sealed. In other embodiments, the filler 12 is fixedly arranged on the inner side wall of the installation cavity of the housing 1.
[0049] like Figure 2 and Figure 4 As shown, in the electric heating device provided in this example, the filler 12 has an inclined surface 13 in contact with the slurry, and the inclined surface 13 is set to reduce the flow resistance of the slurry, so that when the slurry flows from the feed port 2 to the discharge port 3, it smoothly enters the discharge port 3 along the direction of the inclined surface 13. The inclination angle of the inclined surface 13 is set accordingly according to the actual slurry outflow rate and the size of the discharge port 3.
[0050] like Figure 1 and Figure 2 As shown, the electric heating device provided in this example further includes a temperature detection member 14, which is arranged at the discharge port 3 and is used to detect the temperature of the slurry after heating. Specifically, the temperature detection member 14 is a temperature sensor, and a threaded hole is arranged on the side wall of the discharge port 3, and the temperature sensor is installed in the threaded hole. The temperature sensor detects the temperature of the heated slurry, which is convenient for timely control of the heating member 7.
[0051] The electric heating device provided in this example further includes a controller, which is electrically connected to the temperature detection element 14 and the heating element 7. Specifically, the controller is a temperature controller, which outputs an electrical signal to control the thyristor according to the built-in control code, and the thyristor controls the output power of the heating element 7, thereby affecting the slurry temperature at the discharge port 3, realizing closed-loop control, realizing automation of control, and a simple and fast adjustment method.
[0052] The flow direction of the slurry inside the electric heating device: the slurry enters the slurry flow channel 5 from the feed port 2 , and in the process of passing through the slurry flow channel 5 , the slurry is heated by the heating component 4 , and then is sent out from the discharge port 3 .
[0053] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present utility model.
Claims
1. An electric heating device, characterized in that: include: A housing (1) having a mounting cavity, wherein the mounting cavity has a feed port (2) and a discharge port (3); A heating component (4) is arranged in the installation cavity, a slurry flow channel (5) is provided between the heating component (4) and the shell (1), and the slurry flow channel (5) is connected to both the feed port (2) and the discharge port (3); The heating component (4) comprises a heat-scaling component (6) and a heating component (7); the heat-scaling component (6) is made of a heat-conducting material; a heat-scaling cavity (8) is provided inside the heat-scaling component (6); the heating component (7) is arranged in the heat-scaling cavity (8); a heat-conducting medium is provided in the heat-scaling cavity (8); and the heating component (7) is used to heat the heat-conducting medium.
2. The electric heating device according to claim 1, characterized in that: The shell (1) has a sandwich structure (9) on the side wall opposite to the slurry flow channel (5), and the sandwich structure (9) is filled with a heat-insulating medium.
3. The electric heating device according to claim 1, characterized in that: The heat equalizing element (6) further comprises a buffer chamber (10) in communication with the heat equalizing chamber (8) to accommodate the heat-conducting medium that expands due to heat.
4. The electric heating device according to claim 3, characterized in that: The buffer chamber (10) is provided with a pressure relief component (11).
5. The electric heating device according to claim 1, characterized in that: A filling piece (12) is provided in the slurry flow channel (5).
6. The electric heating device according to claim 5, characterized in that: The filler (12) has an inclined surface (13) in contact with the slurry.
7. The electric heating device according to any one of claims 1 to 6, characterized in that: The shell (1) and the heat equalizing element (6) are both tube structures, and the shell (1) and the heat equalizing element (6) are coaxially arranged.
8. The electric heating device according to any one of claims 1 to 6, characterized in that: The shell (1) is arranged vertically, the feed port (2) is arranged at the lower part of the installation cavity, and the discharge port (3) is arranged at the upper part of the installation cavity.
9. The electric heating device according to claim 1, characterized in that: Also includes: A temperature detection component (14), wherein the temperature detection component (14) is arranged at the discharge port (3), and the temperature detection component (14) is used to detect the temperature of the slurry after heating.
10. The electric heating device according to claim 9, characterized in that: Also includes: A controller is electrically connected to the temperature detecting element (14) and the heating element (7).