Explosion-proof electromagnetic wave radiation drying device

Abstract

The utility model discloses an explosion-proof electromagnetic wave radiation drying device which comprises a box body formed by a reflecting plate, a sealing plate is arranged at the top of the box body, and a heated target is arranged at the bottom of the box body; a window is formed in the sealing plate, and a double-layer glass heat insulation box is embedded in the window; the electromagnetic wave radiation source is arranged in the double-layer vacuum glass heat insulation box; the electromagnetic wave radiation source is used for generating electromagnetic wave radiation, and the reflecting plate receives the electromagnetic wave radiation and reflects the radiation. The safety performance of the radiation drying device is improved, the drying efficiency is high, and uniform radiation target surface intensity distribution can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, and in particular to an explosion-proof electromagnetic radiation drying device. Background Technology

[0002] Lithium batteries are batteries that store and release electrical energy by using lithium ions to move back and forth between positive and negative electrodes. They have advantages such as high energy density, long service life, low self-discharge rate, and environmental friendliness, and are widely used in electronic products, electric vehicles, energy storage and other fields.

[0003] NMP (N-methylpyrrolidone) is used in the production of positive electrode sheets for lithium batteries. NMP is a polar solvent with high selectivity and good stability. It has the characteristics of high boiling point, strong solubility, good stability, biodegradability, and recyclability. It is widely used in industries such as lithium batteries, polymer materials, electronics, cleaning agents, pharmaceuticals, pesticides, and pigments. Among them, the lithium battery industry has the largest application scale of NMP.

[0004] Because NMP poses an explosion risk when mixed with air, an explosion may occur if the temperature of the electromagnetic radiation source exceeds the ignition point of NMP when using an electromagnetic radiation source for electrode drying. Therefore, a solution for drying electrodes using an electromagnetic radiation source is needed. Utility Model Content

[0005] The purpose of this invention is to provide an explosion-proof electromagnetic radiation drying device with high safety, high drying efficiency, and uniform radiation target surface intensity.

[0006] The technical solution to achieve the purpose of this utility model is: an explosion-proof electromagnetic radiation drying device, including a box body composed of a reflector, a sealing plate on the top of the box body, and a target to be heated on the bottom of the box body;

[0007] A window is opened on the sealing plate, and a double-glazed insulated box is embedded in the window; the electromagnetic radiation source is set inside the double-glazed insulated box;

[0008] The electromagnetic wave radiation source is used to generate electromagnetic wave radiation, and the reflector receives and reflects the electromagnetic wave radiation.

[0009] Furthermore, the electromagnetic radiation is ultraviolet, visible light, or infrared radiation.

[0010] Furthermore, the double-glazed heat insulation box uses double-glazed glass, including an inner glass layer, an outer glass layer, and a double-glazed cavity. The double-glazed cavity is filled with a heat insulation medium, and the filling vacuum degree is 0 to 1 atm.

[0011] Furthermore, the electromagnetic wave emitting side of the double-glazed heat insulation box faces the inside of the box, and the electromagnetic wave emitting side is sealed with double-glazed glass to spatially isolate the electromagnetic wave radiation source from the target to be dried.

[0012] Furthermore, the double-glazed insulated box has an air circulation channel to dissipate heat from the electromagnetic radiation source.

[0013] Furthermore, a radiation source bracket is installed inside the double-glazed heat insulation box, and an electromagnetic wave radiation source is installed on the radiation source bracket.

[0014] Furthermore, a gap is provided between the top of the box formed by the reflector and the sealing plate, which is used to exhaust the steam generated during drying from inside the box.

[0015] Furthermore, the number of electromagnetic wave radiation sources is one or more.

[0016] Compared with the prior art, the significant advantages of this utility model are: (1) the radiation source and the target are isolated by a double-layer vacuum glass heat-insulating and sealed box, and the outer surface temperature of the double-layer glass heat-insulating box is much lower than the ignition point of the target, which improves the safety performance of the drying device; (2) the drying is carried out by an electromagnetic radiation source, which has high drying efficiency; (3) the use of a reflector plate can achieve a uniform radiation target surface intensity distribution. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the explosion-proof electromagnetic radiation drying device of this utility model.

[0018] Figure 2 This is an exploded view of the structure of the explosion-proof electromagnetic radiation drying device of this utility model.

[0019] Figure 3 This is a schematic diagram of the sealing plate and the double-layer glass heat insulation box in this utility model.

[0020] Figure 4 This is a schematic diagram of the evaporation channel during drying.

[0021] Figure 5 This is a schematic diagram of the airflow and heat dissipation channels for the evaporation channel and the electromagnetic radiation source.

[0022] Figure 6 This is a screenshot of the temperature distribution when the medium inside the simulated double-layered glass is air, as shown in this embodiment of the present invention.

[0023] Figure 7 This is a temperature distribution diagram of each cross section when the medium inside the simulated double-layered glass is air, as shown in the embodiment of this utility model.

[0024] Figure 8This is a screenshot showing the temperature distribution in an embodiment of the present invention when the double-layered glass is in a state of absolute vacuum and the heat dissipation holes are not open.

[0025] Figure 9 This is a temperature distribution diagram of each cross section in an embodiment of the present invention when the double-layered glass is in absolute vacuum and the heat dissipation holes are not open.

[0026] Figure 10 This is a screenshot of the temperature distribution in an embodiment of the present invention when the double-layered glass is in absolute vacuum and has open heat dissipation holes.

[0027] Figure 11 This is a temperature distribution diagram of each cross section in an embodiment of the present invention when the double-layered glass is in absolute vacuum and has open heat dissipation holes.

[0028] Figure 12 This is a radiation diagram simulating the use of a near-infrared radiation source in an embodiment of this utility model.

[0029] Figure 13 This is a radiation intensity distribution diagram of the detection surface simulating the use of a near-infrared radiation source in an embodiment of this utility model. Detailed Implementation

[0030] It is readily understood that, based on the technical solution of this invention, those skilled in the art can conceive of various embodiments of this invention without altering its essential spirit. Therefore, the following specific embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of this invention or as limitations or restrictions on its technical solution.

[0031] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0032] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0033] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0034] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0035] This invention relates to an explosion-proof electromagnetic radiation drying device for drying lithium battery electrodes. Its main objective is to address the problem that high temperatures from electromagnetic radiation sources may cause NMP combustion or even explosion. In the drying field, uniform radiation target surface intensity is almost always required, necessitating a uniform radiation distribution.

[0036] Combination Figures 1-5 The present invention provides an explosion-proof electromagnetic radiation drying device, comprising a box body composed of a reflector plate 3, a sealing plate 4 on the top of the box body, and a target to be heated 6 on the bottom of the box body.

[0037] A window 5 is opened on the sealing plate 4, and a double-glazed heat insulation box 2 is embedded in the window 5; an electromagnetic radiation source 1 is set inside the double-glazed heat insulation box 2.

[0038] The electromagnetic wave radiation source 1 is used to generate electromagnetic wave radiation, and the reflector 3 receives and reflects the electromagnetic wave radiation.

[0039] As a specific example, the electromagnetic radiation is ultraviolet, visible, or infrared radiation.

[0040] As a specific example, the double-glazed heat insulation box 2 uses double-glazed glass, including an inner glass layer 21, an outer glass layer 22, and a double-glazed cavity 23. The double-glazed cavity 23 is filled with a heat insulation medium, and the filling vacuum degree is 0 to 1 atm.

[0041] As a specific example, the electromagnetic wave emitting side of the double-glazed heat insulation box 2 faces the inside of the box, and the electromagnetic wave emitting side is sealed with double-glazed glass to spatially isolate the electromagnetic wave radiation source 1 from the target to be dried.

[0042] As a specific example, the double-glazed insulated box 2 has an air circulation channel to dissipate heat from the electromagnetic radiation source 1.

[0043] As a specific example, a radiation source bracket is provided inside the double-glazed heat insulation box 2, and an electromagnetic wave radiation source 1 is installed on the radiation source bracket.

[0044] As a specific example, a gap 7 is provided between the top of the box formed by the reflector 3 and the sealing plate 4, which is used to discharge the steam generated during drying from the box.

[0045] As a specific example, the number of electromagnetic wave radiation sources 1 is one or more.

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0047] Example

[0048] This embodiment uses a simulation platform to simulate a radiation drying device. This radiation drying device has a low surface temperature and can achieve uniform radiation. The following is a simulation verification of the above effects:

[0049] (1) Temperature

[0050] Simulation platform: ICEPAK

[0051] Heat source: Electromagnetic radiation source 1

[0052] Power: 7×2KW

[0053] Inner medium of double-glazed glass: air or absolute vacuum

[0054] ① When the double-glazed cavity 23 is filled with air and the window 5 is sealed, the temperature distribution is as follows: Figure 6 As shown, the cross-sectional temperature curve is as follows: Figure 7 As shown. By Figure 6 , Figure 7 It can be seen that the outer surface of the inner glass 21 reaches nearly 350°C, and the outer surface of the outer glass 22 has a maximum temperature of about 225°C.

[0055] ② When the medium filling the double-layered glass cavity 23 is set to absolute vacuum and the window 5 is sealed, the temperature distribution is as follows: Figure 8 As shown, the cross-sectional temperature curve is as follows: Figure 9 As shown. By Figure 8 , Figure 9 It can be seen that the outer surface temperature of the inner glass 21 is approximately 1250°C, and the highest temperature of the outer surface temperature of the outer glass 22 is approximately 200°C. Due to the fact that absolute vacuum does not conduct heat, the temperature of the light source increases dramatically, and the temperature of the inner glass 21 also rises.

[0056] ③ When the medium inside the double-layered glass cavity 23 is set to absolute vacuum and window 5 is open, the temperature distribution is as follows: Figure 10 As shown, the cross-sectional temperature curve is as follows: Figure 11 As shown. By Figure 10 , Figure 11 It can be seen that the temperature of other materials, except for the radiation source, is significantly reduced. The surface temperature of the inner glass layer drops to below 175°C, while the outer glass layer remains almost unchanged from the ambient temperature (25°C). This effectively isolates the heat energy of the radiation source and ensures safety during the drying process.

[0057] As can be seen from the above, by isolating the electromagnetic radiation source 1 from the interior of the oven with double-layered glass, the surface temperature of the outer glass can be effectively reduced; after opening window 5, the heat from the electromagnetic radiation source 1 will hardly cause the surface temperature of the outer glass to rise.

[0058] (2) Uniformity

[0059] Simulation platform: TracePro

[0060] Radiation source: VCSEL

[0061] Radiation source area: 10cm × 10cm

[0062] Divergence angle: 60° (full angle)

[0063] Reflector: Three reflectors form a hollow rectangular rod, 12cm × 12cm × 25cm

[0064] For a 10cm×10cm VCSEL, a 12cm×12cm×25cm hollow rectangular rod was used for homogenization. The radiation pattern of the VCSEL after using the hollow rectangular rod formed by reflector 3 is shown below. Figure 12 As shown in the figure, the radiation intensity distribution of the VCSEL detector surface after using a hollow rectangular rod is as follows. Figure 13 As shown in the figure. The results show that on a 10cm×10cm detection surface 1cm from the outlet of the hollow rectangular rod, the uniformity reached over 90%, meeting the uniformity requirements for electrode drying.

[0065] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An explosion-proof electromagnetic radiation drying device, characterized in that, The box includes a reflector (3), a sealing plate (4) is provided on the top of the box, and a target to be heated (6) is provided at the bottom of the box; A window (5) is opened on the sealing plate (4), and a double-glazed heat insulation box (2) is embedded in the window (5); an electromagnetic radiation source (1) is set inside the double-glazed heat insulation box (2); The electromagnetic radiation source (1) is used to generate electromagnetic radiation, and the reflector (3) receives and reflects the electromagnetic radiation.

2. The explosion-proof electromagnetic radiation drying device according to claim 1, characterized in that, The electromagnetic radiation is ultraviolet, visible light, or infrared radiation.

3. The explosion-proof electromagnetic radiation drying device according to claim 1 or 2, characterized in that, The double-glazed heat insulation box (2) uses double-glazed glass, including an inner glass layer (21), an outer glass layer (22) and a double-glazed cavity (23). The double-glazed cavity (23) is filled with heat insulation medium and the filling vacuum degree is 0 to 1 atm.

4. The explosion-proof electromagnetic radiation drying device according to claim 3, characterized in that, The electromagnetic wave emitting side of the double-glazed heat insulation box (2) faces the inside of the box, and the electromagnetic wave emitting side is sealed with double-glazed glass to spatially isolate the electromagnetic wave radiation source (1) from the target to be dried.

5. The explosion-proof electromagnetic radiation drying device according to claim 3, characterized in that, The double-glazed insulated box (2) has an air circulation channel to dissipate heat from the electromagnetic radiation source (1).

6. The explosion-proof electromagnetic radiation drying device according to claim 3, characterized in that, The double-glazed heat insulation box (2) is equipped with a radiation source bracket, and the electromagnetic wave radiation source (1) is installed on the radiation source bracket.

7. The explosion-proof electromagnetic radiation drying device according to claim 3, characterized in that, A gap (7) is provided between the top of the box body formed by the reflector (3) and the sealing plate (4), which is used to discharge the steam generated during drying from the box body.

8. The explosion-proof electromagnetic radiation drying device according to claim 3, characterized in that, The number of electromagnetic wave radiation sources (1) is one or more.

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