Guard device for solid-state battery production plant and production plant

Abstract

This application relates to a protective device and production equipment for solid-state battery production equipment. The protective device includes a sealed chamber, an exhaust mechanism, and an intake mechanism. The sealed chamber has a accommodating space for housing the solid-state battery production equipment. The exhaust mechanism includes at least one exhaust pipe assembly, which includes an intake pipe and an exhaust fan. The intake pipe is located within and communicates with the accommodating space and is used to draw in gas from the accommodating space. The exhaust fan is located outside the sealed chamber and communicates with the intake pipe to discharge gas from the intake pipe. The intake mechanism is located on the sealed chamber and is configured for unidirectional air intake, with the direction of unidirectional air intake being the direction in which external gas enters the accommodating space. The solution provided by this application can effectively protect the solid-state battery production equipment by combining the sealed chamber, exhaust mechanism, and intake mechanism, thereby reducing production costs and safety risks.

Description

Technical Field

[0001] This application relates to the field of solid-state battery technology, and in particular to protective devices and production equipment for solid-state battery production equipment. Background Technology

[0002] Sulfide solid electrolytes are considered an ideal alternative to liquid electrolytes in lithium-based batteries due to their excellent safety performance. In this system, lithium sulfide is a key raw material and is crucial for the preparation of sulfide solid electrolytes. However, lithium sulfide is highly hygroscopic and readily undergoes hydrolysis in air, generating highly toxic and flammable hydrogen sulfide gas.

[0003] In related technologies, the manufacturing process of lithium sulfide solid-state batteries is carried out in a strictly closed system, with inert gas continuously introduced for protection.

[0004] However, the above methods have some problems: 1. They require strict system airtightness, necessitating the use of high-standard sealing materials and structural designs in production equipment, which increases equipment manufacturing and maintenance costs. 2. The continuous consumption of inert gas leads to resource waste, and fluctuations or interruptions in the inert gas supply may cause quality fluctuations in batches of products or even safety accidents. Utility Model Content

[0005] To address or partially address the problems existing in related technologies, this application provides a protective device and production equipment for solid-state battery production equipment, which can effectively protect the solid-state battery production equipment by combining a sealed chamber, an exhaust mechanism, and an intake mechanism, thereby reducing production costs and safety risks.

[0006] The first aspect of this application provides a protective device for solid-state battery production equipment, comprising:

[0007] A sealed chamber having a space for accommodating a solid-state battery production apparatus;

[0008] An exhaust mechanism, comprising at least one exhaust pipe assembly, wherein the at least one exhaust pipe assembly comprises an intake pipe and an exhaust fan; the intake pipe is disposed within and communicates with the receiving space and is used to draw in gas from the receiving space; the exhaust fan is disposed outside the sealed room and communicates with the intake pipe to discharge gas from the intake pipe.

[0009] An air intake mechanism is provided on the sealed chamber and is configured for unidirectional air intake, wherein the direction of unidirectional air intake is the direction in which external gas enters the accommodating space.

[0010] As an optional embodiment, the intake mechanism includes:

[0011] A housing, which is disposed through the sealed chamber, and a first air inlet communicating with the accommodating space is provided on the housing;

[0012] An intake fan is provided inside the housing and located below the first air inlet to deliver external gas from the first air inlet into the accommodating space.

[0013] A one-way valve is provided at the first air inlet;

[0014] An actuator is connected to the one-way valve and is used to drive the one-way valve to open and close; when the intake fan is working normally, the actuator drives the one-way valve to open to allow external gas to enter the containment space; and when the intake fan stops working, the actuator drives the one-way valve to close to prevent gas in the containment space from flowing back to the outside.

[0015] As an optional embodiment, the air intake mechanism further includes a filter disposed within the housing and located below the air intake fan.

[0016] As an optional embodiment, the exhaust fan includes:

[0017] The cover has a second air inlet and an air outlet. The second air inlet is connected to the air intake pipe, and the air outlet is perpendicular to the air intake direction of the second air inlet.

[0018] Blades, the blades being disposed within the cover body;

[0019] A variable frequency motor is connected to the blade and is used to drive the blade to rotate at different speeds to change the relationship between the air output from the outlet and the air intake from the first inlet.

[0020] As an optional embodiment, when the variable frequency motor is in a low-frequency state, the variable frequency motor drives the blade to rotate at a low speed so that the air volume of the outlet is not greater than the air volume of the first inlet; and when the variable frequency motor is in a high-frequency state, the variable frequency motor drives the blade to rotate at a high speed so that the air volume of the outlet is greater than the air volume of the first inlet.

[0021] As an optional embodiment, the protective device further includes a sensor located in the sealed chamber and used to detect a preset signal in the sealed chamber. The sensor is also electrically connected to the variable frequency motor so that the variable frequency motor changes its current frequency according to the preset signal detected by the sensor.

[0022] As an optional embodiment, the sensor includes at least one of a pressure sensor, a concentration sensor, and a dew point detection sensor.

[0023] As an optional embodiment, the exhaust pipe assembly includes:

[0024] An annular pipe, the bottom end of which is connected to the intake pipe, and an exhaust port is provided on the portion of the annular pipe away from the intake pipe;

[0025] An exhaust pipe is provided inside or outside the sealed room and is vertically connected to the exhaust port of the annular pipe; and the exhaust fan is connected to the end of the exhaust pipe away from the annular pipe.

[0026] As an optional embodiment, the air intake pipe is provided with an array of multiple air intake holes.

[0027] The first aspect of this application provides a solid-state battery production equipment, including a solid-state battery production apparatus and the aforementioned protective device, wherein the solid-state battery production apparatus is disposed within the accommodating space.

[0028] The technical solution provided in this application may include the following beneficial results:

[0029] This application can contain harmful gases generated by solid-state battery production equipment within a sealed space by sealing the chamber, and concentrate the harmful gases to be discharged through the intake pipe and exhaust fan. Combined with the intake mechanism, it can achieve one-way air intake, replenishing fresh air into the sealed chamber, while preventing harmful gases from being discharged into the external environment, thereby achieving efficient protection of solid-state battery production equipment and reducing production costs and safety risks.

[0030] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0031] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0032] Figure 1 This is a schematic diagram of the structure of the protective device for solid-state battery production equipment shown in the embodiments of this application;

[0033] Figure 2 yes Figure 1 The diagram shows the structure of the exhaust mechanism.

[0034] Figure 3This is a schematic diagram of the intake mechanism shown in the embodiments of this application;

[0035] Figure 4 yes Figure 3 Top view;

[0036] Figure 5 yes Figure 3 Main sectional view;

[0037] Figure 6 This is a schematic diagram of the structure of the exhaust fan shown in the embodiment of this application.

[0038] Figure label:

[0039] 1. Sealed chamber; 10. Containment space; 2. Exhaust mechanism; 20. Exhaust pipe assembly; 200. Annular pipe; 201. Exhaust port; 202. Discharge pipe; 21. Intake pipe; 210. Intake hole; 22. Exhaust fan; 220. Cover; 221. Second air inlet; 222. Air outlet; 223. Variable frequency motor; 3. Intake mechanism; 31. Housing; 310. First air inlet; 32. Intake fan; 33. One-way valve; 34. Actuator; 35. Filter. Detailed Implementation

[0040] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0041] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0042] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] In related technologies, the manufacturing process of lithium sulfide solid-state batteries is carried out in a strictly closed system, with inert gas continuously introduced for protection.

[0045] However, the above methods have some problems: 1. They require strict system airtightness, necessitating the use of high-standard sealing materials and structural designs in production equipment, which increases equipment manufacturing and maintenance costs. 2. The continuous consumption of inert gas leads to resource waste, and fluctuations or interruptions in the inert gas supply may cause quality fluctuations in batches of products or even safety accidents.

[0046] To address the aforementioned issues, this application provides a protective device for solid-state battery production equipment. This device effectively protects the solid-state battery production equipment by combining a sealed chamber, an exhaust mechanism, and an intake mechanism, thereby reducing production costs and safety risks.

[0047] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0048] Figure 1 This is a schematic diagram of the protective device of a solid-state battery production equipment shown in an embodiment of this application.

[0049] See Figure 1This application provides a protective device for a solid-state battery production equipment, including a sealed chamber 1, an exhaust mechanism 2, and an intake mechanism 3. The sealed chamber 1 has a housing space 10 for accommodating the solid-state battery production equipment. The exhaust mechanism 2 includes at least one exhaust pipe assembly 20, which includes an intake pipe 21 and an exhaust fan 22. The intake pipe 21 is located inside and connected to the housing space 10 and is used to draw in gas from the housing space 10. The exhaust fan 22 is located outside the sealed chamber 1 and is connected to the intake pipe 21 to discharge gas from the intake pipe 21. The intake mechanism 3 is located on the sealed chamber 1 and is configured for unidirectional air intake, with the direction of unidirectional air intake being the direction in which external gas enters the housing space 10.

[0050] In this embodiment, the sealed chamber 1 can be a protective cover composed of a stainless steel bracket and a PC board. The stainless steel bracket provides the supporting strength of the sealed chamber 1, and the PC board provides a transparent and visible appearance. Adhesive is applied to the connection between the stainless steel bracket and the PC board, and a cushioning pad is provided to prevent damage to the sealed chamber 1. The containment space 10 within the sealed chamber 1 forms a sealed space, enclosing the solid-state battery production device within the containment space 10 and preventing harmful gases within the containment space 10 from entering the external environment.

[0051] In this embodiment, the harmful gases generated by the solid-state battery production device can be directly discharged into the containment space 10, and the exhaust mechanism 2 is used to discharge the harmful gases in the containment space 10 to a designated location. Specifically, the suction pipe 21 can concentrate the harmful gases in the containment space 10 into the pipe, and the exhaust fan 22 discharges the harmful gases in the suction pipe 21 to the designated location.

[0052] In this embodiment, the intake mechanism 3 enables unidirectional air intake, replenishing the containment space 10 with fresh air and thus ventilating the containment space 10. Furthermore, the intake mechanism 3 only allows external gas to enter the containment space 10, further preventing harmful gases from being released into the external environment and posing a danger to the environment and personnel.

[0053] Therefore, in this embodiment, the harmful gases generated by the solid-state battery production device can be sealed within the containment space 10 by the sealing chamber 1, and the harmful gases can be concentrated and discharged through the intake pipe 21 and the exhaust fan 22. Combined with the intake mechanism 3, one-way air intake is achieved to replenish the air into the sealing chamber 1, while preventing the harmful gases from being discharged into the external environment. This achieves efficient protection of the solid-state battery production device and reduces production costs and safety risks.

[0054] As an optional embodiment, see Figures 3 to 5The air intake mechanism 3 includes a housing 31, an air intake fan 32, a one-way valve 33, and an actuator 34. The housing 31 is disposed through the sealed chamber 1, and a first air intake 310 communicating with the accommodating space 10 is provided on the housing 31. The air intake fan 32 is disposed inside the housing 31 and located below the first air intake 310 to transport external gas from the first air intake 310 into the accommodating space 10. The one-way valve 33 is disposed at the first air intake 310. The actuator 34 is connected to the one-way valve 33 and is used to drive the opening and closing of the one-way valve 33. When the air intake fan 32 is working normally, the actuator 34 drives the one-way valve 33 to open, so as to allow external gas to enter the accommodating space 10. When the air intake fan 32 stops working, the actuator 34 drives the one-way valve 33 to close, so as to prevent the gas in the accommodating space 10 from flowing back to the outside.

[0055] In this embodiment, the housing 31 can be embedded in a mounting hole at the top of the sealed chamber 1. The housing 31 can be a hollow structure, with a first air inlet 310 located at the top of the housing 31 and connected to the accommodating space 10. A one-way valve 33 is located at the first air inlet 310. When the one-way valve 33 is open, the first air inlet 310 is open, allowing external gas to enter the accommodating space 10; when the one-way valve 33 is closed, the first air inlet 310 is closed, preventing gas in the accommodating space 10 from flowing back to the outside, thereby achieving unidirectional gas flow from the outside to the accommodating space 10.

[0056] Furthermore, when the intake fan 32 is working normally, it can quantitatively introduce external gas into the containment space 10. In this case, the actuator 34 drives the one-way valve 33 to open, allowing external gas to enter the containment space 10. Conversely, when the intake fan 32 stops working, the gas in the containment space 10 may flow back to the outside. In this case, the actuator 34 drives the one-way valve 33 to close, preventing the gas in the containment space 10 from flowing back to the outside.

[0057] In this embodiment, the actuator 34 can be a cylinder, and the one-way valve 33 can be a pneumatic valve.

[0058] As a preferred embodiment, see Figure 3 The air intake mechanism 3 also includes a filter 35, which is located inside the housing 31 and below the air intake fan 32.

[0059] In this embodiment, the filter 35 can be a filter component in the FFU fan filter unit to filter the gas input into the containment space 10 and prevent it from affecting the production quality of the solid-state battery production device.

[0060] As a preferred embodiment, see Figure 6The exhaust fan 22 includes a cover 220, blades, and a variable frequency motor 223. The cover 220 has a second air inlet 221 and an air outlet 222. The second air inlet 221 is connected to the air intake pipe 21, and the air outlet 222 is perpendicular to the air intake direction of the second air inlet 221. The blades are located inside the cover 220. The variable frequency motor 223 is connected to the blades and is used to drive the blades to rotate at different speeds to change the relationship between the air output of the air outlet 222 and the air intake of the first air inlet 310.

[0061] In this embodiment, the exhaust fan 22 can be a variable frequency fan. It draws harmful gases from the intake pipe 21 into the hood 220 through the second air inlet 221, and then discharges the harmful gases from the outlet 222 through blade rotation. The outlet 222's outlet direction is perpendicular to the intake direction of the second air inlet 221, ensuring that the outlet and intake directions are not on the same horizontal line to prevent interference between intake and exhaust. By using a variable frequency motor 223 to rotate the blades, the relationship between the exhaust volume of the outlet 222 and the intake volume of the first air inlet 310 can be changed. This alters the concentration, pressure, and moisture content of harmful gases within the containment space 10, maintaining these parameters within a set range and achieving stable emission of harmful gases from the containment space 10.

[0062] In a preferred embodiment, when the variable frequency motor 223 is in a low-frequency state, the variable frequency motor 223 drives the blades to rotate at a low speed so that the air volume of the outlet 222 is not greater than the air volume of the first air inlet 310; and when the variable frequency motor 223 is in a high-frequency state, the variable frequency motor 223 drives the blades to rotate at a high speed so that the air volume of the outlet 222 is greater than the air volume of the first air inlet 310.

[0063] In this embodiment, the air intake volume of the first air inlet 310 can be a fixed value. When the variable frequency motor 223 is in a low frequency state or a high frequency state, the air output volume of the air outlet 222 can be changed by adjusting the rotation speed of the blades according to the air intake volume of the first air inlet 310, so that the air output volume of the air outlet 222 is not greater than or greater than the air intake volume of the first air inlet 310.

[0064] In a preferred embodiment, the protective device also includes a sensor (not shown in the figure), which is located in the sealed chamber 1 and is used to detect a preset signal in the sealed chamber 1. The sensor is also electrically connected to the variable frequency motor 223 so that the variable frequency motor 223 changes its own current frequency according to the preset signal detected by the sensor.

[0065] In this embodiment, a controller can also be provided. The controller receives preset signals detected by sensors and determines the concentration, pressure, and moisture content of harmful gases within the containment space 10 based on these signals. It then determines whether to change the gas output of the outlet 222 based on these signals. For example, when the concentration, pressure, and moisture content of harmful gases within the containment space 10 exceed the standard, the current frequency of the variable frequency motor 223 can be increased to increase the gas output of the outlet 222, thus bringing the concentration, pressure, and moisture content of harmful gases within the containment space 10 within the set range. Conversely, when the concentration, pressure, and moisture content of harmful gases within the containment space 10 do not exceed the standard, the current frequency of the variable frequency motor 223 can be decreased to reduce the gas output of the outlet 222, thus maintaining the concentration, pressure, and moisture content of harmful gases within the containment space 10 within the set range. This achieves stable discharge of harmful gases from the containment space 10.

[0066] The controller in this application embodiment can be a PLC, PID, etc., and its circuitry is not modified. This application does not limit it.

[0067] In a preferred embodiment, the sensor includes at least one of a pressure sensor, a concentration sensor, and a dew point detection sensor.

[0068] In this embodiment, the pressure sensor can be used to detect the pressure difference between the containment space 10 and the external environment. The air output of the air outlet 222 can be controlled by the signal detected by the pressure sensor, so that the containment space 10 always maintains negative pressure and prevents harmful gases from leaking out.

[0069] The concentration sensor can be used to detect the concentration of harmful gases in the containment space 10. The gas output of the outlet 222 can be controlled by the signal detected by the concentration sensor, so that the concentration of harmful gases in the containment space 10 is maintained within the set range and does not exceed the standard.

[0070] The dew point sensor can be used to detect the dew point temperature of the gas. Based on the dew point temperature, the moisture content in the containment space 10 can be determined. The gas output of the outlet 222 can be controlled by the signal detected by the dew point sensor to keep the moisture content in the containment space 10 within the set range and not exceed the standard. Otherwise, hydrogen sulfide reacts with water to produce harmful substances.

[0071] As an optional embodiment, see Figure 2 The exhaust pipe assembly 20 includes an annular pipe 200 and an exhaust pipe 202. The bottom end of the annular pipe 200 is connected to the intake pipe 21, and the portion of the annular pipe 200 away from the intake pipe 21 has an exhaust port 201. The exhaust pipe 202 is located inside or outside the sealed chamber 1 and is vertically connected to the exhaust port 201 of the annular pipe 200. An exhaust fan 22 is connected to the end of the exhaust pipe 202 away from the annular pipe 200.

[0072] In this embodiment, the exhaust pipe assembly 20 can be arranged according to the actual structure of the solid-state battery production device to adapt to the solid-state battery production device.

[0073] The exhaust pipe assembly 20 in this application embodiment can have at least two of the following:

[0074] 1. The exhaust pipe assembly 20 includes an annular pipe 200 and an exhaust pipe 202. The bottom end of the annular pipe 200 is connected to the intake pipe 21, and the top of the annular pipe 200 is provided with an exhaust port 201. The exhaust pipe 202 is located outside the sealed chamber 1 and is vertically connected to the exhaust port 201 of the annular pipe 200. An exhaust fan 22 is connected to the end of the exhaust pipe 202 away from the annular pipe 200.

[0075] 2. The exhaust pipe assembly 20 includes an annular pipe 200 and an exhaust pipe 202. The bottom end of the annular pipe 200 is connected to the intake pipe 21, and an exhaust port 201 is provided in the middle of the annular pipe 200. The exhaust pipe 202 is located inside the sealed chamber 1 and is vertically connected to the exhaust port 201 of the annular pipe 200. An exhaust fan 22 is connected to the end of the exhaust pipe 202 away from the annular pipe 200.

[0076] In this embodiment, since hydrogen sulfide gas sinks to the bottom, the effective absorption of hydrogen sulfide gas can be achieved by placing the suction pipe 21 at the bottom end of the annular pipe 200.

[0077] In addition, the ring pipe 200 can be square, rhomboid, or other shapes to achieve multi-directional emission of harmful gases.

[0078] As an optional embodiment, see Figure 2 Multiple air intake holes 210 are arrayed on the air intake pipe 21.

[0079] In this embodiment of the application, by arraying multiple air intake holes 210 on the air intake pipe 21, the air intake area can be increased, thereby achieving comprehensive and concentrated absorption of harmful gases.

[0080] Corresponding to the aforementioned application function implementation device embodiments, this application also provides a solid-state battery production equipment and corresponding embodiments.

[0081] This application also provides a solid-state battery production equipment, including a solid-state battery production apparatus and the aforementioned protective device, wherein the solid-state battery production apparatus is disposed within the accommodating space 10.

[0082] This embodiment of the application achieves effective protection of the solid-state battery production device by enclosing it in the containment space 10. Harmful gases are concentratedly discharged through the intake pipe 21 and the exhaust fan 22. Combined with the intake mechanism 3, one-way air intake is achieved to replenish fresh air into the sealed chamber 1, while preventing harmful gases from being discharged into the external environment. This achieves efficient protection of the solid-state battery production device and reduces production costs and safety risks.

[0083] The solution of this application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs.

[0084] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A guard device for a solid-state battery production apparatus, characterized by, include: A sealed chamber (1) has a housing space (10) for accommodating a solid-state battery production device. An exhaust mechanism (2) includes at least one exhaust pipe assembly (20), the at least one exhaust pipe assembly (20) including an intake pipe (21) and an exhaust fan (22); the intake pipe (21) is located inside and connected to the accommodating space (10), and is used to draw gas from the accommodating space (10); the exhaust fan (22) is located outside the sealed chamber (1) and is connected to the intake pipe (21) to discharge gas from the intake pipe (21); An air intake mechanism (3) is provided on the sealed chamber (1), and the air intake mechanism (3) is configured to allow one-way air intake, wherein the direction of the one-way air intake is the direction in which external gas enters the accommodating space (10).

2. The guard of claim 1, wherein The air intake mechanism (3) includes: The housing (31) is disposed through the sealed chamber (1), and the housing (31) is provided with a first air inlet (310) that communicates with the accommodating space (10). An intake fan (32) is provided inside the housing (31) and located below the first air inlet (310) to transport external gas from the first air inlet (310) to the accommodating space (10); One-way valve (33), the one-way valve (33) is located at the first air inlet (310); A driver (34) is connected to the one-way valve (33) and is used to drive the one-way valve (33) to open and close; and when the intake fan (32) is working normally, the driver (34) drives the one-way valve (33) to open so as to allow external gas to enter the containment space (10); and when the intake fan (32) stops working, the driver (34) drives the one-way valve (33) to close so as to prevent the gas in the containment space (10) from flowing back to the outside.

3. The guard of claim 2, wherein, The air intake mechanism (3) also includes a filter (35), which is located inside the housing (31) and below the air intake fan (32).

4. The guard of claim 2, wherein The exhaust fan (22) includes: The cover (220) has a second air inlet (221) and an air outlet (222) on it. The second air inlet (221) is connected to the air intake pipe (21), and the air outlet (222) is perpendicular to the air intake direction of the second air inlet (221). Blades, the blades being disposed within the cover (220); A variable frequency motor (223) is connected to the blade and is used to drive the blade to rotate at different speeds to change the relationship between the amount of air output from the outlet (222) and the amount of air intake from the first inlet (310).

5. The guard of claim 4, wherein When the variable frequency motor (223) is in a low frequency state, the variable frequency motor (223) drives the blade to rotate at a low speed so that the air output of the air outlet (222) is not greater than the air intake of the first air inlet (310); Furthermore, when the variable frequency motor (223) is in a high frequency state, the variable frequency motor (223) drives the blade to rotate at high speed so that the air output of the air outlet (222) is greater than the air intake of the first air inlet (310).

6. The guard of claim 4, wherein The protective device also includes a sensor, which is located in the sealed chamber (1) and is used to detect a preset signal in the sealed chamber (1). The sensor is also electrically connected to the variable frequency motor (223) so that the variable frequency motor (223) changes its own current frequency according to the preset signal detected by the sensor.

7. The protective device according to claim 6, characterized in that, The sensor includes at least one of a pressure sensor, a concentration sensor, and a dew point detection sensor.

8. The guard of claim 1, wherein The exhaust pipe assembly (20) includes: An annular pipe (200) is provided, the bottom end of which is connected to the intake pipe (21), and an exhaust port (201) is provided on the part of the annular pipe (200) away from the intake pipe (21). The discharge pipe (202) is located inside or outside the sealed chamber (1) and is vertically connected to the exhaust port (201) of the annular pipe (200); and the exhaust fan (22) is connected to one end of the discharge pipe (202) away from the annular pipe (200).

9. The guard of claim 1, wherein, Multiple air intake holes (210) are arranged in an array on the air intake pipe (21).

10. A solid-state battery production apparatus characterized by comprising: It includes a solid-state battery production apparatus and a protective device as described in any one of claims 1 to 9, wherein the solid-state battery production apparatus is disposed within the accommodating space (10).

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