Explosion-proof online baking device and method

Abstract

The invention discloses an explosion-proof online baking device and method, and relates to the field of battery production. An explosion-proof type on-line baking device comprises a baking oven, two sides of the baking oven are respectively provided with a material inlet and a material outlet which are used for feeding and discharging sulfide solid electrolyte films, and the explosion-proof type on-line baking device further comprises an inert gas storage box which is fixedly installed on the rear side of the baking oven; the first inert gas pump is mounted on the inert gas storage box, and the gas extraction end of the first inert gas pump is communicated with the gas outlet of the inert gas storage box; inert gas pressure higher than inlet and outlet air pressure is maintained in the drying oven, and the near-vacuum air curtain and distributed negative pressure design are combined, so that external air is effectively prevented from entering the drying oven, the explosion risk possibly caused by reaction of oxygen and sulfide in the drying process is avoided, the anti-explosion performance of the device is greatly improved, and the service life of the device is prolonged. Due to the explosion-proof design, the safety of the production process is guaranteed, and the possibility of explosion accidents caused by equipment failures or misoperation is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of battery production, and in particular relates to an explosion-proof online baking device and method. Background Art

[0002] In the process of battery cell production, especially in the process stage after the electrode is formed, before die-cutting or after die-cutting, the sulfide solid electrolyte film needs to be heated and dried. This is because the sulfide solid electrolyte film may adsorb a certain amount of moisture or organic solvents during the preparation process. These residual substances will have an adverse effect on the performance of the battery cell, such as reducing the conductivity of the battery, inducing side reactions, etc. Therefore, effective drying of the sulfide solid electrolyte film is an important link to ensure the quality of the battery cell.

[0003] Sulfide solid electrolyte film may release some flammable and explosive gases during the drying process. Traditional drying equipment often does not have effective treatment and protection measures for these special gases. In the drying environment, once these gases are mixed with air to reach a certain concentration ratio, they are very likely to explode when encountering ignition sources such as fire or static electricity. For example, some sulfides will decompose when heated to produce combustible gases such as hydrogen sulfide. If these gases cannot be isolated in time in the heating and drying device, they will bring serious safety hazards.

[0004] Some existing drying devices lack effective gas isolation devices at the inlet and outlet. During the drying process, the high temperature and airflow inside the drying device may cause the internal gas to overflow into the external environment. At the same time, the external air may easily enter the drying device. The random flow of this gas will not only affect the drying effect, but also increase the risk of explosion. In particular, when the external air enters the drying device, it may provide an oxidant for the flammable and explosive gas inside, further exacerbating the possibility of explosion. In view of this, the present invention is specially proposed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide an explosion-proof online baking device and method that can overcome the above problems or at least partially solve the above problems.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: an explosion-proof online baking device, comprising an oven, wherein both sides of the oven are respectively provided with a feed port and a discharge port for supplying and discharging a sulfide solid electrolyte film, and further comprising: an inert gas storage box, fixedly mounted on the rear side of the oven; a first inert gas pump, mounted on the inert gas storage box, the exhaust end of the first inert gas pump being connected to the gas outlet of the inert gas storage box, and the gas delivery end of the first inert gas pump being connected to the gas inlet of the oven; a gas collection shell, symmetrically solid The gas collecting shell is fixedly connected to both sides of the oven, a through hole is opened on the gas collecting shell for the sulfide solid electrolyte film to pass through, and a plurality of exhaust pipes are equidistantly connected to the upper end of the gas collecting shell; a guide baffle is fixedly connected to the oven near the feed inlet and the discharge port; a receiving roller for receiving the sulfide solid electrolyte film is rotatably connected to the two guide baffles; an air knife is fixedly connected to the gas collecting shell near the guide baffle, and the air outlet of the air knife is inclined upward; an air pressure sensor is fixedly installed in the oven and the gas collecting shell.

[0007] In order to prolong the residence time of the sulfide solid electrolyte film in the oven and thus facilitate sufficient heating of the sulfide solid electrolyte film, further, two groups of conveying rollers are symmetrically rotatably connected in the oven, and the two groups of conveying rollers are distributed at the upper and lower ends of the oven.

[0008] In order to facilitate the maintenance of the components in the oven and to make it easier for the staff to wrap the sulfide solid electrolyte film around the conveyor roller, further, a box opening is provided on the side of the oven away from the inert gas storage box, and a box door is rotatably connected to the box opening of the oven.

[0009] In order to prevent part of the overflowed hydrogen sulfide waste gas from contacting the air, further, a second inert gas pump is connected to one side of the inert gas storage box close to the gas collection shell, and the gas delivery end of the second inert gas pump is connected to the wind knife on the same side through a gas delivery pipe.

[0010] In order to facilitate the cleaning of dust on the sulfide solid electrolyte film, further, the gas collection shell is provided with symmetrically rotating upper and lower sides near the opening to clean dust on the surface of the sulfide solid electrolyte film.

[0011] In order to facilitate the use of airflow to drive the cleaning roller brush to rotate, further, a driving compartment is provided at the position of the air supply pipe near the two cleaning roller brushes, and a rotating shaft is rotatably connected in the driving compartment, and blades are fixedly connected to the rotating shaft at equidistant intervals around the circumference. One end of the rotating shaft extends out of the driving compartment and is fixedly connected to the adjacent cleaning roller brush.

[0012] In order to facilitate the purification and removal of hydrogen sulfide in the inert gas, a purification box storing a metal oxide solution is further fixedly installed on the upper end of the oven, the air outlet of the exhaust pipe is connected to the air inlet of the purification box, and the air outlet of the purification box is connected to the recovery port of the inert gas storage box through a return air pipe, and a one-way valve is provided in the air inlet and outlet of the purification box.

[0013] In order to prolong the time that the gas stays in the purification box, further, a plurality of guide plates are fixedly connected at equal intervals in the purification box, and every two adjacent guide plates are staggered.

[0014] In order to facilitate the removal of most of the moisture in the inert gas and ensure the continuous water absorption effect of the absorbent sponge, two mesh plates are further arranged above the guide plate in the purification box, the mesh plate located below is fixedly connected to the purification box, the mesh plate located above is slidably connected to the purification box, a water-absorbing sponge is arranged between the two mesh plates, and an electric telescopic rod is fixedly connected to the upper end of the purification box, and the telescopic end of the electric telescopic rod is fixedly connected to the mesh plate located above.

[0015] A baking method mainly comprises the following steps:

[0016] S1: Before heating and baking the sulfide solid electrolyte film, the explosion-proof online baking device must first be fully inspected to ensure that the inert gas storage box has sufficient inert gas reserves and that the first inert gas pump can work normally to ensure that the inert gas can be stably supplied to the oven in the future;

[0017] S2: According to the thickness, water content and other characteristics of the sulfide solid electrolyte film, the gas flow and pressure parameters of the first inert gas pump are set. Generally speaking, it is necessary to ensure that the inert gas pressure in the oven is higher than the air pressure at the feed port and the discharge port. Usually, the air pressure in the oven is 0.1-0.3MPa higher than the external air pressure to prevent external air from entering the oven.

[0018] S3: Set the wind speed and angle parameters of the wind knife so that the wind knife forms an effective near-vacuum wind curtain at the feed port and the discharge port. The wind speed of the wind knife is usually set at 10-20m / s, and the angle is adjusted according to the specific structure of the feed port and the discharge port, generally between 30-60 degrees, to ensure that gas overflow can be prevented;

[0019] S4: feeding the sulfide solid electrolyte film into the oven through the feeding port. During the feeding process, the sulfide solid electrolyte film is guided by a receiving roller;

[0020] S5: The air pressure at the feed inlet is monitored in real time through the air pressure sensor at the feed inlet. If the air pressure sensor detects an abnormal air pressure, for example, the air pressure difference is less than the set value, it may be that the wind speed of the air knife is insufficient or the inert gas pressure in the oven is insufficient. At this time, it is necessary to adjust the output pressure of the first inert gas pump or the wind speed of the air knife in time to ensure that the air pressure at the feed inlet is stable;

[0021] S6: After the sulfide solid electrolyte film enters the oven, the first inert gas pump continuously delivers inert gas into the oven, so that the oven is filled with an inert gas environment. In this environment, the sulfide solid electrolyte film is driven by the receiving roller to move at a uniform speed in the oven to be heated and baked;

[0022] S7: The heating system in the oven starts to work. The baking temperature is set according to the baking requirements of the sulfide solid electrolyte film. Generally speaking, the baking temperature is between 80-150°C. The specific temperature depends on the composition of the sulfide solid electrolyte film and the required degree of dryness. During the heating process, the inert gas in the oven is continuously circulated to ensure that the film is heated evenly.

[0023] S8: The air pressure sensor in the oven monitors the air pressure in the oven in real time. In order to maintain the gradient negative pressure environment in the oven and ensure that all gases can be exported from the output ports of the negative pressure air curtains at the inlet and outlet of the production line, the working parameters of the first inert gas pump are dynamically adjusted according to the data feedback from the air pressure sensor;

[0024] S9: After heating and baking, the sulfide solid electrolyte film is discharged from the oven by the receiving roller at the discharge port. During the discharge process, similar to the feed port, the wind knife at the discharge port forms an air curtain to prevent the gas in the oven from overflowing when the film is discharged, and to prevent external air from entering the oven.

[0025] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: the present invention effectively prevents external air from entering the oven by maintaining an inert gas pressure higher than the inlet and outlet air pressure in the oven, and combines a near-vacuum air curtain and a distributed negative pressure design, thereby avoiding the risk of explosion caused by the reaction of oxygen and sulfide during the drying process, and greatly improving the explosion-proof performance of the device. In the front-end process of the battery cell, especially for the drying and heating of the sulfide solid electrolyte film after the electrode is formed, before or after die-cutting, this explosion-proof design ensures the safety of the production process and reduces the possibility of explosion accidents caused by equipment failure or improper operation.

[0026] Inert gas protection drying ensures that the sulfide solid electrolyte film is dried in an oxygen-free environment, preventing oxidation and other chemical reactions of the film, and ensuring the chemical stability and physical properties of the film, which is crucial to the performance and quality of subsequent battery cells.

[0027] Real-time air pressure monitoring and stable wind curtain effect make the operation safer for operators, reduce the potential safety hazards caused by gas leakage or abnormal pressure, and also make it easier for operators to monitor and maintain the equipment.

[0028] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In the attached picture:

[0030] Figure 1 A schematic diagram of the structure of an explosion-proof online baking device proposed by the present invention Figure 1 ;

[0031] Figure 2 A schematic diagram of the structure of an explosion-proof online baking device proposed by the present invention Figure 2 ;

[0032] Figure 3 This is a schematic diagram of the structure inside the oven of an explosion-proof online baking device proposed by the present invention;

[0033] Figure 4 This is a schematic diagram of the structure inside a driving chamber in an explosion-proof online baking device proposed by the present invention;

[0034] Figure 5 This is a schematic diagram of the structure inside a purification box in an explosion-proof online baking device proposed by the present invention;

[0035] Figure 6 An explosion-proof online baking device proposed by the present invention Figure 3 The structural diagram of part A in the figure;

[0036] Figure 7 An explosion-proof online baking device proposed by the present invention Figure 4 Schematic diagram of the structure of part B.

[0037] In the figure: 1. oven; 101. oven door; 102. conveying roller; 103. gas collecting shell; 104. guide baffle; 105. receiving roller; 106. air pressure sensor; 2. inert gas storage box; 201. first inert gas pump; 3. second inert gas pump; 301. gas pipe; 302. air knife; 303. drive bin; 304. cleaning roller brush; 305. blade; 4. purification box; 401. exhaust pipe; 402. return air pipe; 403. guide plate; 404. water-absorbing sponge; 405. mesh plate; 406. electric telescopic rod. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0039] Embodiment 1:

[0040] Reference Figure 1-Figure 7 , an explosion-proof online baking device, comprising an oven 1, wherein both sides of the oven 1 are respectively provided with a feed port and a discharge port for supplying a sulfide solid electrolyte film, and further comprising: an inert gas storage box 2, fixedly mounted on the rear side of the oven 1; a first inert gas pump 201, mounted on the inert gas storage box 2, wherein the exhaust end of the first inert gas pump 201 is connected to the gas outlet of the inert gas storage box 2, and the gas delivery end of the first inert gas pump 201 is connected to the gas inlet of the oven 1; a gas collecting shell 103, symmetrically fixedly connected to both sides of the oven 1, and the gas collecting shell 103 A through hole is opened on the top for the sulfide solid electrolyte film to pass through, and a plurality of exhaust pipes 401 are equidistantly connected to the upper end of the gas collection shell 103; a guide baffle 104 is fixedly connected to the position of the oven 1 near the feed port and the discharge port; a receiving roller 105 for receiving the sulfide solid electrolyte film is rotatably connected to the two guide baffles 104; an air knife 302 is fixedly connected to the gas collection shell 103 near the guide baffle 104, and the air outlet of the air knife 302 is inclined upward; an air pressure sensor 106 is fixedly installed in the oven 1 and the gas collection shell 103.

[0041] The explosion-proof online baking device is mainly composed of an oven 1, an inert gas storage box 2, a first inert gas pump 201, a gas collecting shell 103, a guide baffle 104, a receiving roller 105, an air knife 302 and an air pressure sensor 106. The oven 1 is the core part of the device, and a feed port and a discharge port are respectively arranged on both sides of the oven 1 for the entry and exit of the sulfide solid electrolyte film. The inert gas storage box 2 is fixedly installed on the rear side of the oven 1, and the first inert gas pump 201 is installed on the inert gas storage box 2. The first inert gas pump 201 is negative The inert gas is extracted from the inert gas storage box 2 and transported to the oven 1, so that the oven 1 is filled with the inert gas to provide a protective atmosphere for the heating of the sulfide solid electrolyte film. The gas collecting shell 103 is symmetrically fixedly connected to both sides of the oven 1, and is provided with a through hole for the sulfide solid electrolyte film to pass through. The upper end of the gas collecting shell 103 is equidistantly connected to a plurality of exhaust pipes 401 for exhausting the gas blown out by the wind knife 302. The guide baffle 104 is fixedly connected to the oven 1 near the feed port and the discharge port, and its function is to guide the airflow. To prevent the gas in the wind curtain generated by the wind knife 302 from entering the oven 1, the receiving roller 105 is rotatably connected to the two guide baffles 104, and is used to receive the sulfide solid electrolyte film to ensure that the film can smoothly pass through the oven 1 during the heating process. The wind knife 302 is fixedly connected to the gas collection shell 103 near the guide baffle 104, and its air outlet is inclined upward. The function of the wind knife 302 is to form wind curtains at the feed inlet and the discharge port to prevent the gas in the oven 1 from overflowing. The air pressure sensor 106 is respectively installed in the oven 1 and the gas collection shell 103, and is used to monitor the air pressure in the oven 1 and at the inlet and outlet in real time. When the air pressure in the oven 1 is abnormal, it is convenient for the staff to adjust the supply of inert gas in time to ensure that the air pressure in the oven 1 is always higher than the air pressure at the inlet and outlet.

[0042] The first inert gas pump 201 extracts inert gas from the inert gas storage box 2 and transports it to the oven 1. Since the pressure of the inert gas in the cavity exceeds the pressure of the feed port and the discharge port, a positive pressure environment is formed in the oven 1, so that the outside air cannot enter the oven 1, thereby preventing oxygen in the air from contacting the sulfide solid electrolyte film, and preventing the hydrogen sulfide released from the sulfide solid electrolyte film during the heating process from reacting with oxygen in the air and causing the risk of explosion, thereby achieving protective heating of the sulfide solid electrolyte film. When starting the first inert gas pump 201, the flow rate and pressure of the inert gas are adjusted according to the process requirements to ensure that the inert gas pressure in the oven 1 is stable and higher than the pressure of the feed port and the discharge port.

[0043] When the wind knife 302 is working, a high-speed airflow is ejected from the wind knife 302, forming an effect similar to a wind curtain at the feed port and the discharge port. This wind curtain is similar to a near-vacuum state, so that the gas in the oven 1 is confined in the oven 1, and at the same time, external air is prevented from entering the oven 1, further improving the explosion-proof effect and avoiding pollution to the external environment. In addition, a gradient negative pressure is formed inside the oven 1, and all gases are exported from the output ports of the negative pressure wind curtain at the inlet and outlet of the production line. This distributed explosion-proof method prevents possible flammable and explosive gases from accumulating in the oven 1 by controlling the flow direction and pressure of the gas, thereby reducing the risk of explosion. When the wind knife 302 is started, the wind speed and angle of the wind knife 302 can be adjusted so that the wind curtain can effectively cover the feed port and the discharge port to prevent gas overflow. At the same time, the air pressure value at the feed port and the oven 1 is monitored in real time by the air pressure sensor 106 to ensure that the effect of the wind curtain and the pressure balance in the oven 1 are ensured.

[0044] By maintaining an inert gas pressure higher than the inlet and outlet air pressures in the oven 1, and combining a near-vacuum air curtain and a distributed negative pressure design, external air is effectively prevented from entering the oven 1, thereby avoiding the risk of explosion caused by the reaction between oxygen and sulfide during the drying process, and greatly improving the explosion-proof performance of the device. In the front-end process of the battery cell, especially for the drying and heating of the sulfide solid electrolyte film after the electrode is formed, before or after die-cutting, this explosion-proof design ensures the safety of the production process and reduces the possibility of explosion accidents caused by equipment failure or improper operation.

[0045] Inert gas protection drying ensures that the sulfide solid electrolyte film is dried in an oxygen-free environment, preventing oxidation and other chemical reactions of the film, and ensuring the chemical stability and physical properties of the film, which is crucial to the performance and quality of subsequent battery cells.

[0046] Real-time air pressure monitoring and stable wind curtain effect make the operation safer for operators, reduce the potential safety hazards caused by gas leakage or abnormal pressure, and also make it easier for operators to monitor and maintain the equipment.

[0047] Embodiment 2:

[0048] Reference Figure 1-Figure 7 , an explosion-proof online baking device, which is basically the same as Example 1, and further, two groups of conveying rollers 102 are symmetrically rotatably connected in the oven 1, and the two groups of conveying rollers 102 are distributed at the upper and lower ends of the oven 1. By staggeredly arranging the two groups of conveying rollers 102 in the oven 1, in the process of online baking of the sulfide solid electrolyte film in the oven 1, the residence time of the sulfide solid electrolyte film in the oven 1 can be extended, thereby facilitating sufficient heating of the sulfide solid electrolyte film, and effectively ensuring the production quality of the sulfide solid electrolyte film.

[0049] A box opening is provided on one side of the oven 1 away from the inert gas storage box 2, and a box door 101 is rotatably connected to the box opening of the oven 1. The setting of the box door 101 not only facilitates the inspection and maintenance of the components in the oven 1, but also makes it convenient for the staff to more conveniently wrap the sulfide solid electrolyte film around the conveying roller 102, providing convenience for the staff.

[0050] Embodiment 3:

[0051] Reference Figure 1-Figure 7 , an explosion-proof online baking device, which is basically the same as Example 2, and further, a second inert gas pump 3 is connected to the side of the inert gas storage box 2 close to the gas collection shell 103, and the gas delivery end of the second inert gas pump 3 is connected to the wind knife 302 on the same side through the gas delivery pipe 301. By providing inert gas into the wind knife 302 and then forming a wind curtain at the inlet and outlet of the oven 1, when the hydrogen sulfide waste gas in the oven 1 overflows, the risk of part of the overflowed hydrogen sulfide waste gas contacting with the air and then exploding can be avoided, which further improves the safety of the heating operation of the sulfide solid electrolyte film.

[0052] The upper and lower sides of the gas collection shell 103 near the opening are symmetrically rotated with cleaning roller brushes 304 for cleaning dust on the surface of the sulfide solid electrolyte film. Cleaning roller brushes 304 are arranged at the feed port and the discharge port of the oven 1. In the process of conveying the sulfide solid electrolyte film, the dust on the surface of the sulfide solid electrolyte film can be cleaned, thereby ensuring the cleanliness of the surface of the sulfide solid electrolyte film and avoiding affecting the performance of subsequent battery production.

[0053] A driving bin 303 is provided near the two cleaning roller brushes 304 of the air supply pipe 301. A rotating shaft is rotatably connected in the driving bin 303, and blades 305 are fixedly connected to the rotating shaft at equidistant intervals in a circle. One end of the rotating shaft extends out of the driving bin 303 and is fixedly connected to the adjacent cleaning roller brush 304. When the airflow is transported to the wind knife 302 through the air supply pipe 301, it will first enter the driving bin 303, and then the blade 305 will drive the cleaning roller brush 304 to rotate through the rotating shaft under the impact of the airflow, so that the cleaning roller brush 304 can be controlled to clean the dust on the sulfide solid electrolyte film, so as to avoid dust remaining on the sulfide solid electrolyte film and affecting the performance of the subsequent battery production.

[0054] Embodiment 4:

[0055] Reference Figure 1-Figure 7, an explosion-proof online baking device, which is basically the same as Example 3, and further, a purification box 4 storing a metal oxide solution is fixedly installed on the upper end of the oven 1, and the air outlet of the exhaust pipe 401 is connected to the air inlet of the purification box 4, and the air outlet of the purification box 4 is connected to the recovery port of the inert gas storage box 2 through the return air pipe 402. A one-way valve is arranged in the air inlet and outlet of the purification box 4. Through the setting of the purification box 4, when the inert gas containing hydrogen sulfide waste gas is discharged through the exhaust pipe 401, it will be introduced into the purification box 4, and then the hydrogen sulfide in the inert gas will contact the metal oxide solution, so that the hydrogen sulfide in the inert gas can be purified and removed, so that the inert gas can be recovered and reused.

[0056] A plurality of guide plates 403 are equidistantly fixedly connected in the purification box 4, and are staggered between every two adjacent guide plates 403. By staggeredly distributing the plurality of guide plates 403 in the purification box 4, when the inert gas containing hydrogen sulfide waste gas is introduced into the metal oxide solution in the purification box 4, the inert gas containing hydrogen sulfide waste gas can flow upward in the metal oxide solution in a serpentine shape under the action of the guide plates 403, thereby facilitating increasing the contact time between the inert gas containing hydrogen sulfide waste gas and the metal oxide solution, and further improving the efficiency and effect of hydrogen sulfide removal.

[0057] Two mesh plates 405 are arranged above the guide plate 403 in the purification box 4. The mesh plate 405 at the bottom is fixedly connected to the purification box 4. The mesh plate 405 at the top is slidably connected to the purification box 4. A water-absorbing sponge 404 is arranged between the two mesh plates 405. An electric telescopic rod 406 is fixedly connected to the upper end of the purification box 4. The telescopic end of the electric telescopic rod 406 is fixedly connected to the mesh plate 405 at the top. Through the arrangement of the water-absorbing sponge 404, most of the water in the purified inert gas can be removed. The water content of the inert gas can be reduced by filtering, thereby ensuring the subsequent use of the inert gas, and avoiding the high water content of the recovered inert gas affecting the heating quality of the sulfide solid electrolyte film. By setting the mesh plate 405 and the electric telescopic rod 406, the upper mesh plate 405 can be regularly controlled by the electric telescopic rod 406 to press down the water-absorbing sponge 404, thereby facilitating the squeezing out of the water in the water-absorbing sponge 404, and avoiding the water-absorbing sponge 404 being saturated with water, which affects the removal of water from the inert gas.

[0058] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above with a preferred embodiment, it is not used to limit the present invention.

Claims

1. An explosion-proof online baking device, characterized in that: The invention comprises an oven (1), wherein two sides of the oven (1) are respectively provided with a feed inlet and a discharge outlet for feeding and discharging a sulfide solid electrolyte film, and further comprises: An inert gas storage box (2) is fixedly installed on the rear side of the oven (1); A first inert gas pump (201) is installed on the inert gas storage box (2), wherein the gas extraction end of the first inert gas pump (201) is connected to the gas outlet of the inert gas storage box (2), and the gas delivery end of the first inert gas pump (201) is connected to the gas inlet of the oven (1); A gas collecting shell (103) is symmetrically fixedly connected to two sides of the oven (1), and a through hole is opened on the gas collecting shell (103) to facilitate the passage of the sulfide solid electrolyte film. The upper end of the gas collecting shell (103) is connected to a plurality of exhaust pipes (401) at equal intervals; A flow guide baffle (104) fixedly connected to the oven (1) at a position close to the feed inlet and the discharge outlet; A receiving roller (105) for receiving the sulfide solid electrolyte film, rotatably connected to the two guide baffles (104); An air knife (302) is fixedly connected to a position in the gas collection shell (103) close to the guide baffle (104), and an air outlet of the air knife (302) is arranged to be inclined upward; The air pressure sensor (106) is fixedly installed in the oven (1) and the gas collecting shell (103).

2. The explosion-proof online baking device according to claim 1, characterized in that: Two groups of conveying rollers (102) are symmetrically rotatably connected in the oven (1), and the two groups of conveying rollers (102) are distributed at the upper and lower ends of the oven (1).

3. The explosion-proof online baking device according to claim 2, characterized in that: A box opening is provided on a side of the oven (1) away from the inert gas storage box (2), and a box door (101) is rotatably connected to the box opening of the oven (1).

4. The explosion-proof online baking device according to claim 1, characterized in that: A second inert gas pump (3) is connected to one side of the inert gas storage box (2) close to the gas collection shell (103), and a gas delivery end of the second inert gas pump (3) is connected to an air knife (302) on the same side through a gas delivery pipe (301).

5. The explosion-proof online baking device according to claim 4, characterized in that: Cleaning roller brushes (304) for cleaning dust from the surface of the sulfide solid electrolyte film are symmetrically rotated on the upper and lower sides of the gas collection shell (103) near the opening.

6. The explosion-proof online baking device according to claim 5, characterized in that: The air delivery pipe (301) is provided with a driving chamber (303) near the two cleaning roller brushes (304), a rotating shaft is rotatably connected inside the driving chamber (303), blades (305) are fixedly connected to the rotating shaft at equidistant intervals in a circle, and one end of the rotating shaft extends out of the driving chamber (303) and is fixedly connected to an adjacent cleaning roller brush (304).

7. The explosion-proof online baking device according to claim 1, characterized in that: A purification box (4) storing a metal oxide solution is fixedly mounted on the upper end of the oven (1); the gas outlet of the exhaust pipe (401) is connected to the gas inlet of the purification box (4); the gas outlet of the purification box (4) is connected to the recovery port of the inert gas storage box (2) via a return gas pipe (402); and one-way valves are provided in the gas inlet and outlet of the purification box (4).

8. The explosion-proof online baking device according to claim 7, characterized in that: A plurality of guide plates (403) are fixedly connected at equal intervals in the purification box (4), and are arranged in a staggered manner between every two adjacent guide plates (403).

9. The explosion-proof online baking device according to claim 8, characterized in that: Two mesh plates (405) are arranged above the guide plate (403) in the purification box (4); the mesh plate (405) located at the bottom is fixedly connected to the purification box (4); the mesh plate (405) located at the top is slidably connected to the purification box (4); a water-absorbing sponge (404) is arranged between the two mesh plates (405); an electric telescopic rod (406) is fixedly connected to the upper end of the purification box (4); and the telescopic end of the electric telescopic rod (406) is fixedly connected to the mesh plate (405) located at the top.

10. A baking method, using the explosion-proof online baking device according to claim 1, characterized in that: The main steps include: S1: Before performing a heating and baking operation on the sulfide solid electrolyte film, a comprehensive inspection of the explosion-proof online baking device is first performed to ensure that the inert gas storage box (2) has sufficient reserves of inert gas and that the first inert gas pump (201) can operate normally, so as to ensure that the inert gas can be stably supplied to the oven (1) later; S2: according to the thickness, water content and other characteristics of the sulfide solid electrolyte film, the gas flow rate and pressure parameters of the first inert gas pump (201) are set. Generally speaking, it is necessary to ensure that the inert gas pressure in the oven (1) is higher than the air pressure at the feed inlet and the discharge port. Usually, the air pressure in the oven (1) is 0.1-0.3 MPa higher than the external air pressure to prevent external air from entering the oven (1); S3: setting the wind speed and angle parameters of the wind knife (302) so that the wind knife (302) forms an effective near-vacuum wind curtain at the feed inlet and the discharge outlet. The wind speed of the wind knife (302) is usually set at 10-20 m / s, and the angle is adjusted according to the specific structure of the feed inlet and the discharge outlet, generally between 30-60 degrees, to ensure that gas can be prevented from overflowing; S4: feeding the sulfide solid electrolyte film into the oven (1) through the feeding port. During the feeding process, the sulfide solid electrolyte film is guided by the receiving roller (105); S5: The air pressure at the feed inlet is monitored in real time by the air pressure sensor (106) at the feed inlet. If the air pressure sensor (106) detects that the air pressure is abnormal, for example, the air pressure difference is less than the set value, it may be that the wind speed of the air knife (302) is insufficient or the inert gas pressure in the oven (1) is insufficient. At this time, it is necessary to timely adjust the output pressure of the first inert gas pump (201) or the wind speed of the air knife (302) to ensure that the air pressure at the feed inlet is stable; S6: After the sulfide solid electrolyte film enters the oven (1), the first inert gas pump (201) continuously delivers inert gas into the oven (1), so that the oven (1) is filled with an inert gas environment. In this environment, the sulfide solid electrolyte film is driven by the receiving roller (105) to move at a constant speed in the oven (1) to be heated and baked; S7: the heating system in the oven (1) starts to work, and the baking temperature is set according to the baking requirements of the sulfide solid electrolyte film. Generally speaking, the baking temperature is between 80-150° C., and the specific temperature depends on the composition of the sulfide solid electrolyte film and the required degree of dryness. During the heating process, the inert gas in the oven (1) is continuously circulated to ensure that the film is heated evenly; S8: The air pressure sensor (106) in the oven (1) monitors the air pressure in the oven (1) in real time. In order to maintain a gradient negative pressure environment in the oven (1) and ensure that all gases can be discharged from the output ports of the negative pressure air curtains at the inlet and outlet of the production line, the working parameters of the first inert gas pump (201) are dynamically adjusted according to the data feedback from the air pressure sensor (106); S9: After being heated and baked, the sulfide solid electrolyte film is guided out of the oven (1) by the receiving roller (105) at the discharge port. During the discharge process, similar to the feed port, the wind knife (302) at the discharge port forms an air curtain to prevent the gas in the oven (1) from overflowing when the film is discharged, and to prevent the outside air from entering the oven (1).

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