Production clean room device and control method for sulfide all-solid-state battery

Abstract

The application provides a sulfide full-solid-state battery production small environment device and a control method, and relates to the technical field of solid-state battery production. The sulfide full-solid-state battery production small environment device comprises an isolation bin mechanism, a sealing cover mechanism, a vacuum pipeline, a hydrogen sulfide exhaust pipeline and a fresh air component; the isolation bin mechanism is connected with the sealing cover mechanism, and the sealing cover mechanism is internally provided with a sulfide full-solid-state battery production mechanism; the vacuum pipeline is matched with the isolation bin mechanism, and the vacuum pipeline is connected with the internal space of the isolation bin mechanism; the fresh air component comprises a sealing cover fresh air mechanism and an isolation bin fresh air mechanism, the sealing cover fresh air mechanism is connected with the sealing cover mechanism, the isolation bin fresh air mechanism is connected with the isolation bin mechanism, and the hydrogen sulfide exhaust pipeline is connected with the internal space of the sealing cover mechanism. The sulfide full-solid-state battery production small environment device can improve the development efficiency and production efficiency of the sulfide full-solid-state battery.

Description

Technical Field

[0001] The present application relates to the technical field of solid-state battery production, and in particular to a production microenvironment device and control method for sulfide all-solid-state batteries. Background Art

[0002] There are three main technical routes for all-solid-state batteries: polymers, sulfides, and oxides. Currently, the ionic conductivity of sulfide solid electrolytes has initially met requirements, and subsequent material modification can further enhance ionic conductivity and environmental adaptability. Sulfide systems are highly mature, with rapid development progress, the most likely to be mass-produced in the near term, and offer the best overall advantages. Major automakers are prioritizing sulfides as their preferred technical route for all-solid-state electrolyte materials and their primary development direction.

[0003] Generally, sulfide solid electrolytes (such as Li6PS5Cl) will produce hydrogen sulfide (H2S) in a dry environment with moisture. Hydrogen sulfide is a colorless, highly toxic acidic gas. According to the "GBZT 259-2014 Guidelines for Occupational Hazard Protection of Hydrogen Sulfide", the upper limit of occupational exposure to hydrogen sulfide is ≤10mg / m 3 During the development and trial production of sulfide all-solid-state batteries, for the sake of personnel safety, it is necessary to specifically control the amount and range of hydrogen sulfide release. Existing patents and literature have not yet provided an effective hydrogen sulfide release control device during the production of sulfide all-solid-state batteries, nor a general control logic solution within the device. It is impossible to effectively control the concentration of hydrogen sulfide under multiple working conditions, and it is impossible to effectively guide the development and construction of sulfide all-solid-state battery production lines, which in turn leads to low development efficiency and production efficiency of sulfide all-solid-state batteries. Summary of the Invention

[0004] The purpose of this application is to provide a production microenvironment device and control method for sulfide all-solid-state batteries, which can achieve the technical effect of improving the development efficiency and production efficiency of sulfide all-solid-state battery cells.

[0005] In a first aspect, the present application provides a production microenvironment device for sulfide all-solid-state batteries, comprising an isolation chamber mechanism, a sealing cover mechanism, a vacuum pipeline, a hydrogen sulfide exhaust pipeline, and a fresh air component;

[0006] The isolation chamber mechanism is connected to the sealing cover mechanism, and a production mechanism for a sulfide all-solid-state battery is installed inside the sealing cover mechanism;

[0007] The vacuum pipeline is matched with the isolation chamber mechanism, wherein the vacuum pipeline is connected to the internal space of the isolation chamber mechanism;

[0008] The fresh air component includes a sealed cover fresh air mechanism and an isolation chamber fresh air mechanism. The sealed cover fresh air mechanism is connected to the sealed cover mechanism, the isolation chamber fresh air mechanism is connected to the isolation chamber mechanism, and the hydrogen sulfide exhaust pipeline is connected to the internal space of the sealed cover mechanism.

[0009] In the above-mentioned implementation process, the production microenvironment device of the sulfide all-solid-state battery is the first microenvironment device and the enclosed battery cell box for loading and unloading suitable for the production of sulfide all-solid-state batteries. The selected materials and structural methods meet the structural strength, sealing structure, corrosion resistance and other performance requirements of the environmental room for the production of sulfide all-solid-state batteries; in addition, the control logic meets the needs of multiple working conditions, can be used for various types of equipment and realize centralized control of the entire line, with less development cost of the entire line, which is conducive to centralized management and control of the entire line; thus, the production microenvironment device of the sulfide all-solid-state battery can achieve the technical effect of improving the development efficiency and production efficiency of sulfide all-solid-state batteries.

[0010] Furthermore, the production micro-environment device also includes a movable door assembly, which includes at least one movable door. The movable door and the sealing cover mechanism are locked and sealed by means of fluororubber sealing gaskets and sealant, and the hinges of the movable door are sealed by sealing welding.

[0011] In the above implementation process, the movable door and the sealing cover mechanism, as well as the hinges of the movable door, are sealed to prevent leakage of hydrogen sulfide gas.

[0012] Furthermore, the sealing cover mechanism is provided with an equipment observation window, which is a transparent observation window made of antistatic modified corrosion-resistant polycarbonate, and the equipment observation window and the sheet metal of the sealing cover mechanism are sealed by a silicone pad.

[0013] In the above implementation process, the equipment observation window is made of anti-static modified corrosion-resistant polycarbonate, and a silicone pad is used to seal between the PC board and the sheet metal, which ensures the sealing performance while not affecting the internal observation of the sealing cover mechanism.

[0014] Furthermore, the production micro-environment device also includes a PLC control cabinet, and the sealed cover fresh air mechanism includes a communication mechanism and a variable frequency fan, and the communication mechanism is electrically connected to the variable frequency fan and the PLC control cabinet respectively.

[0015] Furthermore, the sealing cover fresh air mechanism is distributed on the top of the hood of the sealing cover mechanism, and the sealing cover fresh air mechanism is equipped with a check valve.

[0016] In the above implementation process, the fresh air mechanism of the sealed hood is set on the top of the hood, with a distributed layout and equipped with a check valve to ensure that the gas can only enter but not exit.

[0017] Furthermore, each pipeline of the vacuum pipeline and the hydrogen sulfide exhaust pipeline is locked and sealed by means of flanges and fluororubber sealing gaskets, and the interior of the sealing cover mechanism is in a slightly negative pressure state.

[0018] During the above implementation process, a slightly negative pressure state (such as -10 to -30 Pa) needs to be maintained inside the equipment to prevent hydrogen sulfide gas inside the equipment from leaking into the workshop.

[0019] Furthermore, the ratio of the gap leakage area to the overall surface area of ​​the production microenvironment device is less than or equal to 0.04%.

[0020] In the above implementation process, the connection between the various structures of the small environment cover and the logistics between the various equipment are ensured through the loading and unloading of closed battery box transportation to meet the sealing requirements of the sulfide all-solid-state battery production process.

[0021] In a second aspect, the present application provides a control method applied to the production microenvironment device of the sulfide all-solid-state battery described in the first aspect, the control method comprising:

[0022] Acquiring sensor information of the production microenvironment device, wherein the sensor information includes one or more sensor information of a wind pressure sensor, a hydrogen sulfide sensor, and a dew point temperature sensor;

[0023] Process the sensor information according to preset control logic to generate control instructions;

[0024] The sealing cover fresh air mechanism and the isolation chamber fresh air mechanism are controlled according to the control instructions.

[0025] In the above implementation process, the control logic meets the needs of multiple working conditions and can be used for various types of equipment to achieve centralized control of the entire line. The development cost of the entire line is reduced, which is conducive to centralized management and control of the entire line. Therefore, this control method can achieve the technical effect of improving the development efficiency and production efficiency of sulfide all-solid-state batteries.

[0026] Furthermore, the step of controlling the sealing cover fresh air mechanism and the isolation chamber fresh air mechanism according to the control instruction includes:

[0027] The sealing cover fresh air mechanism and the isolation chamber fresh air mechanism are respectively connected to a PLC control cabinet, and the PLC control cabinet controls the operation of the sealing cover fresh air mechanism and the isolation chamber fresh air mechanism according to preset working conditions and the control instructions.

[0028] Furthermore, the preset working conditions include continuous production working conditions, loading and unloading working conditions and accident working conditions. The production microenvironment device of the sulfide all-solid-state battery also includes an accident emergency exhaust fan. The PLC control cabinet controls the operation of the sealing cover fresh air mechanism and the isolation chamber fresh air mechanism according to the preset working conditions and the control instructions, including:

[0029] Detecting the current operating condition of the production microenvironment device of the sulfide all-solid-state battery;

[0030] If the current working condition is a continuous production condition, a first control instruction is generated, wherein the air supply volume of the fresh air mechanism of the sealing cover is less than the exhaust volume of the hydrogen sulfide exhaust pipeline;

[0031] If the current working condition is the loading and unloading working condition, a second control instruction is generated, wherein the difference between the air supply volume of the fresh air mechanism of the sealing cover and the exhaust volume of the hydrogen sulfide exhaust pipe under the second control instruction is greater than a preset air volume value;

[0032] If the current working condition is an accident working condition, a third control instruction is generated, wherein the air supply volume of the fresh air mechanism of the sealing cover is less than the total exhaust volume of the hydrogen sulfide exhaust pipeline and the exhaust volume of the accident emergency exhaust fan.

[0033] Other features and advantages disclosed in the present application will be described in the following description, or some features and advantages can be inferred or determined without doubt from the description, or can be learned by implementing the above-mentioned technology disclosed in the present application.

[0034] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic diagram of the structure of a production microenvironment device for a sulfide all-solid-state battery provided in an embodiment of the present application;

[0037] Figure 2 A structural front view of a production microenvironment device for a sulfide all-solid-state battery provided in an embodiment of the present application;

[0038] Figure 3 A top view of the structure of a production microenvironment device for a sulfide all-solid-state battery provided in an embodiment of the present application;

[0039] Figure 4 A side view of the structure of a production microenvironment device for a sulfide all-solid-state battery provided in an embodiment of the present application;

[0040] Figure 5 A flow chart of the control method provided in the embodiment of the present application;

[0041] Figure 6 A schematic diagram of changes in hydrogen sulfide concentration under continuous working conditions provided in an embodiment of the present application;

[0042] Figure 7 A schematic diagram of the change in water volume under continuous working conditions provided in an embodiment of the present application;

[0043] Figure 8 A schematic diagram of changes in hydrogen sulfide concentration under accident conditions provided in an embodiment of the present application;

[0044] Figure 9 A schematic diagram of the change in water volume under accident conditions provided in an embodiment of the present application.

[0045] Figure numerals: isolation chamber mechanism 100; sealing cover mechanism 200; vacuum pipeline 300; hydrogen sulfide exhaust pipeline 400; fresh air assembly 500; sealing cover fresh air mechanism 510; isolation chamber fresh air mechanism 520; movable door assembly 600; movable door 610; PLC control cabinet 700. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0047] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0048] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0049] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or point connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0050] Furthermore, the terms "first," "second," etc., are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0051] The existing lithium battery production line equipment cover cannot meet the production requirements of sulfide all-solid-state batteries. The disadvantages are as follows:

[0052] ① The existing equipment cover does not take into account the sealing performance. The gas generated during the equipment production process will escape to the outside of the equipment cover without restriction, and it is impossible to effectively control the escape of hydrogen sulfide generated during the production process of sulfide all-solid-state batteries;

[0053] ② The material selection of the existing equipment cover does not take into account the protection against hydrogen sulfide corrosion. The equipment cover is in an environment containing hydrogen sulfide for a long time and cannot effectively maintain the protection requirements for the equipment cover against hydrogen sulfide;

[0054] ③ The air pressure inside the existing equipment cover is usually a positive pressure environment, which cannot form a negative pressure environment inside the equipment cover environment. The positive pressure condition outside the equipment cover environment controls the escape of hydrogen sulfide;

[0055] ④ The existing equipment cover ventilation conditions are relatively simple, with only FFU air intake and the FFU is a fixed-frequency fan, which cannot achieve dynamic adjustment of the hydrogen sulfide concentration under different working conditions.

[0056] Based on this, it is necessary to design a highly reliable small environment device suitable for the production of sulfide all-solid-state batteries and the general control logic of the device to solve the following problems:

[0057] ① Provide a new device structure (small environment cover) that can fully seal the equipment that produces hydrogen sulfide, while achieving negative pressure in the device environment to control the release range of hydrogen sulfide;

[0058] ② Provide universal control logic and control objectives within the small environment cover under multiple working conditions;

[0059] ③ Provide simulation effects of small environment cover on the control of hydrogen sulfide release range, providing a scientific basis for production line construction.

[0060] The key technologies mainly include: the first hydrogen sulfide release range control device structure (small environment cover), optimization of the small environment cover control logic, meeting the needs of dynamic hydrogen sulfide balance under multiple working conditions, thereby ensuring the safety and reliability of battery cell development.

[0061] See Figures 1 to 4 , Figure 1 This is a schematic diagram of the structure of the production microenvironment device of the sulfide all-solid-state battery provided in the embodiment of the present application. Figure 2 This is a structural front view of the production microenvironment device for the sulfide all-solid-state battery provided in an embodiment of the present application. Figure 3 This is a top view of the structure of the production microenvironment device of the sulfide all-solid-state battery provided in the embodiment of the present application. Figure 4 A side view of the structure of a production microenvironment device for a sulfide all-solid-state battery provided in an embodiment of the present application; the production microenvironment device for a sulfide all-solid-state battery includes an isolation chamber mechanism 100, a sealing cover mechanism 200, a vacuum pipeline 300, a hydrogen sulfide exhaust pipeline 400, and a fresh air assembly 500;

[0062] Exemplarily, the isolation chamber mechanism 100 is connected to the sealing cover mechanism 200, and the sealing cover mechanism 200 is installed inside the production mechanism of the sulfide all-solid-state battery;

[0063] Exemplarily, the vacuum pipeline 300 is matched with the isolation chamber mechanism 100, wherein the vacuum pipeline 300 is connected to the internal space of the isolation chamber mechanism 100;

[0064] Exemplarily, the fresh air component 500 includes a sealed cover fresh air mechanism 510 and an isolation chamber fresh air mechanism 520, the sealed cover fresh air mechanism 510 is connected to the sealed cover mechanism 200, the isolation chamber fresh air mechanism 520 is connected to the isolation chamber mechanism 100, and the hydrogen sulfide exhaust pipeline 400 is connected to the internal space of the sealed cover mechanism 200.

[0065] Illustratively, the production microenvironment device for sulfide all-solid-state batteries is the first of its kind to be suitable for the production of sulfide all-solid-state batteries, including a microenvironment device and a closed cell box for loading and unloading. The materials and structural methods used meet the performance requirements of the environmental room for the production of sulfide all-solid-state batteries, such as structural strength, sealing structure, and corrosion resistance. In addition, the control logic meets the needs of multiple working conditions and can be used for various types of equipment to achieve centralized control of the entire line. This reduces the development cost of the entire line and is conducive to centralized management and control of the entire line. Thus, the production microenvironment device for sulfide all-solid-state batteries can achieve the technical effect of improving the development efficiency and production efficiency of sulfide all-solid-state cells.

[0066] Exemplarily, the production microenvironment device also includes a movable door assembly 600, which includes at least one movable door 610. The movable door 610 and the sealing cover mechanism 200 are locked and sealed by means of fluororubber sealing gaskets and sealant, and the hinges of the movable door are sealed by sealing welding.

[0067] Exemplarily, the movable door 610 and the sealing cover mechanism 200 , as well as the hinges of the movable door 610 , are sealed to prevent leakage of hydrogen sulfide gas.

[0068] Exemplarily, the sealing cover mechanism is provided with an equipment observation window, which is a transparent observation window made of antistatic modified corrosion-resistant polycarbonate, and the equipment observation window and the sheet metal of the sealing cover mechanism are sealed by a silicone gasket.

[0069] For example, the equipment observation window is made of anti-static modified corrosion-resistant polycarbonate, and a silicone gasket is used to seal the PC board and the sheet metal, which ensures the sealing performance without affecting the internal observation of the sealing cover mechanism.

[0070] Illustratively, the production micro-environment device further includes a PLC control cabinet 700 , and the sealed cover fresh air mechanism 510 includes a communication mechanism and a variable frequency fan, and the communication mechanism is electrically connected to the variable frequency fan and the PLC control cabinet 700 respectively.

[0071] Exemplarily, the sealed cover fresh air mechanism 510 is distributed on the top of the hood of the sealed cover mechanism 200, and the sealed cover fresh air mechanism 510 is equipped with a check valve.

[0072] Exemplarily, the sealed hood fresh air mechanism 510 is arranged on the top of the hood, with a distributed layout, and is equipped with a check valve to ensure that gas can only enter but not exit.

[0073] Exemplarily, each pipeline of the vacuum pipeline 300 and the hydrogen sulfide exhaust pipeline 400 is locked and sealed by means of flanges and fluororubber gaskets, and the interior of the sealing cover mechanism 200 is in a slightly negative pressure state.

[0074] For example, a slightly negative pressure state (eg, -10 to -30 Pa) needs to be maintained inside the equipment to prevent hydrogen sulfide gas inside the equipment from leaking into the workshop.

[0075] Exemplarily, the ratio of the gap leakage area to the overall surface area of ​​the production microenvironment device is less than or equal to 0.04%.

[0076] For example, the connection between the various structures of the small environment cover and the logistics between the various equipment are ensured through the transportation of closed battery boxes for loading and unloading to meet the sealing requirements in the production process of sulfide all-solid-state batteries.

[0077] See Figure 5 , Figure 5 This is a flow chart of the control method provided in the embodiment of the present application, which is applied to Figures 1 to 4 The production microenvironment device of the sulfide all-solid-state battery shown in the figure, and the control method include:

[0078] S100: Acquire sensor information of a production microenvironment device, where the sensor information includes one or more sensor information of a wind pressure sensor, a hydrogen sulfide sensor, and a dew point temperature sensor;

[0079] S200: Processing sensor information according to preset control logic to generate control instructions;

[0080] S300: Control the fresh air mechanism of the sealed cover and the fresh air mechanism of the isolation chamber according to the control instructions.

[0081] For example, the control logic meets the needs of multiple working conditions and can be used for various types of equipment to achieve centralized control of the entire line. The development cost of the entire line is lower, which is conducive to centralized management and control of the entire line. Therefore, the control method can achieve the technical effect of improving the development efficiency and production efficiency of sulfide all-solid-state batteries.

[0082] Exemplarily, S300: the step of controlling the sealed cover fresh air mechanism and the isolation chamber fresh air mechanism according to the control instruction includes:

[0083] The sealing cover fresh air mechanism and the isolation chamber fresh air mechanism are respectively connected to the PLC control cabinet, and the PLC control cabinet controls the operation of the sealing cover fresh air mechanism and the isolation chamber fresh air mechanism according to preset working conditions and control instructions.

[0084] Exemplarily, the preset working conditions include continuous production working conditions, loading and unloading working conditions, and accident working conditions. The production microenvironment device of the sulfide all-solid-state battery also includes an accident emergency exhaust fan. The steps of the PLC control cabinet controlling the operation of the sealing cover fresh air mechanism and the isolation chamber fresh air mechanism according to the preset working conditions and control instructions include:

[0085] Detect the current operating conditions of the production micro-environment device of sulfide all-solid-state batteries;

[0086] If the current working condition is a continuous production condition, a first control instruction is generated, and under the first control instruction, the air supply volume of the fresh air mechanism of the sealing cover is less than the exhaust volume of the hydrogen sulfide exhaust pipeline;

[0087] If the current working condition is the loading and unloading working condition, a second control instruction is generated. Under the second control instruction, the difference between the air supply volume of the fresh air mechanism of the sealing cover and the exhaust volume of the hydrogen sulfide exhaust pipe is greater than the preset air volume value;

[0088] If the current working condition is an accident working condition, a third control instruction is generated. Under the third control instruction, the air supply volume of the fresh air mechanism of the sealing cover is less than the total exhaust volume of the hydrogen sulfide exhaust pipeline and the exhaust volume of the accident emergency exhaust fan.

[0089] In some embodiments, combined Figures 1 to 5 The production micro-environment device and control method of the sulfide all-solid-state battery shown in the figure are specifically implemented as follows:

[0090] Environmental conditions inside the small environmental hood: ambient temperature 25℃±4℃, cleanliness level 100,000. Working conditions are divided into continuous production conditions (fully enclosed small environmental hood), short-term loading and unloading conditions (small environmental hood with movable door open, including short-term maintenance of faults), and accident conditions.

[0091] If all environmental monitoring parameters are within the defined parameters, it is defined as a continuous production condition. If all environmental monitoring parameters are within the defined parameters and the movable door is in the open state, it is defined as a short-term loading and unloading condition. If one or more environmental monitoring parameters are abnormal, it is defined as an accident condition. The environmental monitoring definition parameters for each condition are calibrated as shown in Table 1:

[0092] Table 1- Environmental conditions definition parameters

[0093] Working condition type Hydrogen sulfide concentration Dew point wind pressure Continuous production conditions ≤5ppm -35℃～-30℃ -30Pa~-10Pa Short-term loading and unloading conditions 5ppm~10ppm -60℃～-35℃ -50Pa~-30Pa Accident conditions >10ppm -30℃ and above -50Pa and below

[0094] The input module receives signals from wind pressure sensors, hydrogen sulfide sensors, and dew point meters located within the plant and the microenvironmental hood. The output module sends control signals to the FFUs, process exhaust fans, and emergency exhaust fans. The PLC control cabinet processes the input signals through program logic based on state changes and outputs corresponding control signals. The PLC control cabinet controls the FFUs, process exhaust fans, and emergency exhaust fans using internally stored programs (ladder diagrams, function block diagrams, instruction lists, or structured text).

[0095] Wind pressure sensors, hydrogen sulfide sensors, and dew point meters are placed in the plant space and small environmental hoods. They are connected to the PLC control cabinet via the RS485 protocol. The PLC control cabinet centrally monitors the data of wind pressure sensors, hydrogen sulfide sensors, and dew point meters throughout the plant. When the wind pressure sensors, hydrogen sulfide sensors, and dew point meters exceed the limit, they will send a communication signal to the PLC control cabinet. The FFU, process exhaust fans, and emergency exhaust fans are centrally controlled by the PLC control cabinet. The specific working conditions are as follows:

[0096] (1) Continuous production working condition control logic: The PLC control cabinet monitors the parameters of the wind pressure sensor, hydrogen sulfide sensor and dew point meter. The PLC control cabinet transmits signals to the FFU system in the small environment device to supply air, and the process exhaust fan exhausts air. Under this working condition, the FFU air supply volume is less than the process exhaust fan exhaust volume to maintain a low dew point and slightly negative pressure in the small environment hood.

[0097] (2) Control logic of short-term loading and unloading conditions: The PLC control cabinet monitors the parameters of the wind pressure sensor, hydrogen sulfide sensor and dew point meter. The PLC control cabinet transmits signals to the FFU system in the small environment device to reduce air supply and increase the exhaust volume of the process exhaust fan to form a relatively large negative pressure environment inside the small environment hood, so that the door opening of the small environment hood is constantly in a negative pressure state to ensure that hydrogen sulfide does not escape at the door opening. Under this condition, the FFU air supply volume is less than the exhaust volume of the process exhaust fan to achieve a low dew point and a slight negative pressure in the small environment hood.

[0098] (3) Accident condition control logic: The PLC control cabinet monitors the parameters of the wind pressure sensor, hydrogen sulfide sensor and dew point meter. When the parameters exceed the limit, the PLC control cabinet transmits a signal to the small environment device to increase the FFU system air supply, turn on the process exhaust fan and the accident emergency exhaust fan for exhaust. Under this condition, the FFU air supply volume is less than the process exhaust fan exhaust volume + the accident emergency exhaust fan exhaust volume, so as to achieve a rapid reduction in the hydrogen sulfide concentration in the small environment hood.

[0099] Table 2-PLC centralized control cabinet control mode

[0100]

[0101] (1) The development concept of hydrogen sulfide control in the plant environment: the outside of the room is at atmospheric pressure, the inside of the room is at a slightly positive pressure (5Pa to 30Pa), the inside of the equipment (small environmental cover) is at a slightly negative pressure (-10Pa to -30Pa), and the pipeline between the small environmental cover and the exhaust gas treatment system is at a negative pressure (-10Pa to -100Pa);

[0102] (2) The external space of the factory is at atmospheric pressure. The dehumidifier supplies air to control the dew point of the factory space. The air supply duct is equipped with a check valve to prevent hydrogen sulfide from overflowing, while maintaining a slightly positive pressure in the factory space. The return air from the dehumidifier is processed by a hydrogen sulfide absorber to prevent hydrogen sulfide from corroding the dehumidifier unit.

[0103] (3) The small environment hood (inside the equipment) is actively supplied with air in the factory through the FFU variable frequency fan. The FFU is equipped with a check valve to prevent hydrogen sulfide from overflowing. The small environment hood is equipped with a variable frequency fan for process exhaust and a variable frequency fan for emergency exhaust to control the concentration of hydrogen sulfide in the small environment hood while maintaining a slight negative pressure (-10Pa to -30Pa) in the small environment hood, thereby suppressing the diffusion of hydrogen sulfide in the equipment;

[0104] (4) The RTO system is arranged outside the factory building to chemically neutralize the hydrogen sulfide in the process exhaust fan and the emergency exhaust fan pipes, while maintaining a slight negative pressure in the pipes to prevent hydrogen sulfide backflow.

[0105] For example, the internal volume of the simulation model is 24.2m 3 The leakage area of ​​the door panel gap accounts for 0.04% of the total surface area (0.035m 2 ), 1m 3 The cell volatilization produces 3.34ppm / min (2.145mg / s) of hydrogen sulfide, and the entire device volatilizes 1.913mg / s of hydrogen sulfide. Calculate the hydrogen sulfide concentration C under accident conditions. The calculation formula for the hydrogen sulfide volatilization amount X is as follows:

[0106]

[0107] in:

[0108] C--mg / m 3 ;

[0109] ppm - parts per million;

[0110] MW - molecular weight of the substance, hydrogen sulfide 34.15;

[0111] 24.05--20℃, 101.3kPa, the volume of 1 mol of gas;

[0112] V--Equipment effective volume 24.2m 3 .

[0113] For example, the production microenvironment device for sulfide all-solid-state batteries provided in the embodiments of the present application is an innovative device structure, wherein:

[0114] 1. Small environment hood:

[0115] (1) Development ideas of small environment cover:

[0116] The leakage area of ​​the small environmental cover gap accounts for 0.04% of the total surface area;

[0117] The material selection of the small environment cover must meet the requirements of hydrogen sulfide corrosion resistance;

[0118] The strength simulation of the small environment cover structure meets the positioning vibration requirements of the production environment;

[0119] The small environment cover should reserve sufficient space for the flow of people, logistics and maintenance.

[0120] (2) The equipment sheet metal protection plate adopts 1.5mm thick 304 or Q235B (baking paint);

[0121] (3) The equipment wire holes are sealed with rubber plugs (through-wall plates);

[0122] (4) The top cover of the equipment hood is sealed by full welding;

[0123] (5) The joints between the hoods are locked and sealed with stainless steel + fluororubber gaskets;

[0124] (6) There must be a fluororubber protective pad at the connection support plate between the hood and the frame, and the square surface at the bottom of the hood must fit tightly with the support plate to ensure the sealing after the hood is installed;

[0125] (7) After assembly, apply glue around the outer edge of the joint to ensure that the hood is completely sealed and leak-proof.

[0126] 2. Movable door:

[0127] (1) The movable door adopts 1.5mm thick 304 or Q235B (baking paint);

[0128] (2) The hood door is locked and sealed using a fluororubber gasket + sealant;

[0129] (3) The hinges of the movable door are sealed by blocking welding;

[0130] (4) The equipment observation window is made of anti-static modified corrosion-resistant polycarbonate PC+PTFE+PUR (transparent), and a silicone pad is used to seal between the PC board and the sheet metal.

[0131] 3. Hood FFU system:

[0132] (1) FFU must be equipped with RS485 communication and variable frequency fan, and the equipment must be made of stainless steel;

[0133] (2) FFU realizes group control and partition control through the PLC control cabinet touch screen, which can monitor or monitor the operating status of each FFU;

[0134] (3) The FFU is arranged on the top of the hood in a distributed layout, and a check valve is installed at the FFU to ensure that gas can only enter but not exit.

[0135] 4. Upper hood duct:

[0136] (1) Pipes are locked and sealed by flange + fluororubber gasket;

[0137] (2) A slightly negative pressure state (-10 to -30 Pa) must be maintained inside the equipment to prevent hydrogen sulfide gas from leaking into the workshop.

[0138] For example, the connections between the various structures of the small environmental cover and the logistics between the various equipment are transported through the closed battery box for loading and unloading to meet the sealing requirements in the production process of sulfide all-solid-state batteries (the leakage surface of the door panel gap accounts for 0.04% of the total surface area); the equipped FFU and piping system ensure a slightly negative pressure state (-10~30pa) to prevent the hydrogen sulfide gas inside the equipment from leaking into the workshop; the small environmental cover components and sealing devices are all made of anti-corrosion materials to ensure full sealing of the equipment under production conditions containing hydrogen sulfide;

[0139] In some implementation scenarios, examples of simulation effects of the production microenvironment device and control method of sulfide all-solid-state batteries provided in the embodiments of the present application are as follows:

[0140] Simulation condition settings:

[0141] Process exhaust: exhaust air volume 1467m 3 / h, the diameter of the pipe mouth is 98mm, and the exhaust air speed is calculated to be 54m / s;

[0142] Emergency exhaust: exhaust air volume 2219m 3 / h, the diameter of the pipe mouth is 98mm, and the exhaust air speed is calculated to be 81.72m / s;

[0143] Set the initial multi-component concentration: hydrogen sulfide accounts for 10mg / m 3 (7.04ppm), water accounts for 376ppm, and the rest is air components;

[0144] Set the air intake conditions: the total air volume of the six FFUs under process exhaust conditions is 1467m 3 / h; under the condition of emergency exhaust, the total air volume of six FFUs is 2179m 3 / h; of which hydrogen sulfide accounts for 0, moisture accounts for 38.8ppm (dew point temperature -30℃), and the rest is air;

[0145] Set the leak surface pressure to the external atmospheric pressure, with 0% hydrogen sulfide, 376 ppm water (dew point temperature -30°C), and the remainder air;

[0146] The cell area is set as the hydrogen sulfide volatilization surface, with a volatilization rate of 3.34ppm / min (1.913mg / s);

[0147] Set the gravity field G;

[0148] Set the entire outer surface to wall.

[0149] The simulation results are shown below:

[0150] 1. Continuous production conditions:

[0151] Volume change curve of each component:

[0152] Under the current simulation conditions, the volume fractions of internal hydrogen sulfide and water show a clear downward trend. Figure 6 Schematic diagram of the change of hydrogen sulfide concentration under continuous working conditions provided in the embodiment of this application, Figure 7 A schematic diagram of the change in water volume under continuous working conditions provided in an embodiment of the present application;

[0153] Exhaust air volume 1467m 3 / h, fresh air intake volume 1441m 3 / h, the average concentration of hydrogen sulfide decreased from 5mg / m 3 (3.52ppm) reduced to 0.295mg / m 3 When the ambient moisture content is 376ppm and the intake air moisture content is 38.8ppm (-30°C), after 120s of exhaust ventilation, the internal moisture content of the entire machine is 83.34ppm, reaching the -42°C dew point requirement and meeting the -35°C to -30°C dew point requirement.

[0154] The component volume cloud diagram is displayed in the form of a cross-sectional diagram, and some results are presented in the form of multiple cross-sectional axonometric diagrams. The simulation results are the internal conditions of the model at 150s.

[0155] For the hydrogen sulfide component, the concentration in most areas inside the entire machine is below 5ppm. There is a small amount of hydrogen sulfide accumulation below the door panel at the far end of the exhaust vent, which can be solved by blocking the slit of the door panel in the area; for the moisture component, the content in most areas inside the entire machine is below 100ppm, and the accumulation location is the same as that of hydrogen sulfide.

[0156] There is no obvious partition area inside the whole machine, so the pressure in the area except the negative pressure pipe is almost the same.

[0157] Under process exhaust, when the fresh air intake coefficient (fresh air intake coefficient = intake air volume ÷ exhaust air volume) is 0.982, the interior of the whole machine is in a negative pressure state, and the maximum negative pressure value detected is -0.0083 Pa.

[0158] 2. Accident conditions:

[0159] Volume change curve of each component:

[0160] Under the current simulation conditions, the volume fractions of internal hydrogen sulfide and water show a clear downward trend. Figure 8 Schematic diagram of the change of hydrogen sulfide concentration under accident conditions provided in the embodiment of this application, Figure 9 A schematic diagram of the change in water volume under accident conditions provided in an embodiment of the present application;

[0161] Exhaust air volume 2219m 3 / h, fresh air intake volume 2179m 3 / h, the current structure can reduce the average concentration of hydrogen sulfide from 10ppm to 5ppm in 24.5s; at the same time, when the ambient moisture content is 376ppm and the intake moisture content is 38.8ppm, after 150s (i.e. 2.5min) of exhaust ventilation, the moisture content inside the whole machine is 49.03ppm, which can reach the dew point requirement of -48℃ and meet the dew point requirement of -45℃.

[0162] The component volume cloud diagram is displayed in the form of a cross-sectional diagram, and some results are presented in the form of multiple cross-sectional axonometric diagrams. The simulation results are the internal conditions of the model at 150s.

[0163] For the hydrogen sulfide component, the concentration in most areas inside the entire machine is below 5ppm. There is a small amount of hydrogen sulfide accumulation below the door panel at the far end of the exhaust vent, which can be solved by blocking the slit of the door panel in the area; for the moisture component, the content in most areas inside the entire machine is below 100ppm, and the accumulation location is the same as that of hydrogen sulfide.

[0164] There is no obvious partition area inside the whole machine, so the pressure in the area except the negative pressure pipe is almost the same.

[0165] Since the intake fresh air coefficient is 0.982 (intake fresh air coefficient = intake air volume ÷ exhaust air volume), the fresh air volume is lower than the exhaust air volume, the entire machine is in a negative pressure state, and the maximum negative pressure detected is -0.011pa.

[0166] After the process exhaust is turned on for 120 seconds, the hydrogen sulfide concentration in most areas of the entire machine is less than 5mg / m 3 (3.52ppm) design requirement; no 3.52ppm concentration area was observed visually.

[0167] When the moisture content of the external environment is 376ppm (-30℃ dew point) and the intake air moisture content is 38.8ppm (-50℃ dew point), after 120s of exhaust ventilation, the moisture content inside the entire device is 83.34ppm, meeting the -42℃ dew point requirement but not meeting the -50℃ dew point requirement.

[0168] The process exhaust design can meet the requirement of quickly reducing the concentration of hydrogen sulfide inside the machine, with the average concentration from 5mg / m 3(3.52ppm) reduced to 0.295mg / m 3 (0.416ppm);

[0169] Under process exhaust, when the fresh air intake coefficient (fresh air intake coefficient = intake air volume ÷ exhaust air volume) is 0.982, the interior of the whole machine is in a negative pressure state, and the maximum negative pressure value detected is -0.0083 Pa.

[0170] ① After 150 seconds of emergency exhaust, the hydrogen sulfide concentration in most areas inside the whole machine meets the design requirement of less than 5ppm;

[0171] ② When the ambient moisture content is 376ppm (-30℃ dew point) and the intake air moisture content is 38.8ppm (-50℃ dew point), after 150s (2.5min) of exhaust ventilation, the moisture content inside the whole machine is 49.03ppm, reaching the -48℃ dew point requirement and meeting the -45℃ dew point requirement;

[0172] ③ The emergency exhaust design can meet the requirement of quickly reducing the hydrogen sulfide concentration inside the machine, and it takes 24.5 seconds to reduce the average concentration from 10ppm to 5ppm;

[0173] ④ Under accident emergency exhaust, when the fresh air coefficient (fresh air coefficient = intake air volume ÷ exhaust air volume) is 0.982, the interior of the whole machine is in a negative pressure state, and the maximum negative pressure value detected is -0.011pa.

[0174] For example, the microenvironmental device for sulfide all-solid-state battery production provided in the present application utilizes a pioneering microenvironmental device and enclosed cell box for loading and unloading, along with the device's universal control logic, suitable for sulfide all-solid-state battery production. This device provides rapid guidance on how to control the generation and escape of hydrogen sulfide in production environments where it is produced. A centralized PLC control cabinet monitors data and controls system operation, reducing logical redundancy across the entire production line's microenvironmental enclosures. Simulation results demonstrate that this microenvironmental device and universal control logic meet the safety requirements of sulfide all-solid-state battery production, improving cell production safety and product quality, and ultimately enhancing product competitiveness.

[0175] In all embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms will not be elaborated in the embodiments of the present application.

[0176] It should be understood that the phrases “in this embodiment,” “in an embodiment of the present application,” or “as an optional implementation” mentioned throughout the specification mean that specific features, structures, or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, “in this embodiment,” “in an embodiment of the present application,” or “as an optional implementation” appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0177] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0178] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A production microenvironment device for sulfide all-solid-state batteries, characterized in that: It includes an isolation chamber mechanism, a sealing cover mechanism, a vacuum pipeline, a hydrogen sulfide exhaust pipeline and a fresh air component; The isolation chamber mechanism is connected to the sealing cover mechanism, and a production mechanism for a sulfide all-solid-state battery is installed inside the sealing cover mechanism; The vacuum pipeline is matched with the isolation chamber mechanism, wherein the vacuum pipeline is connected to the internal space of the isolation chamber mechanism; The fresh air component includes a sealed cover fresh air mechanism and an isolation chamber fresh air mechanism. The sealed cover fresh air mechanism is connected to the sealed cover mechanism, the isolation chamber fresh air mechanism is connected to the isolation chamber mechanism, and the hydrogen sulfide exhaust pipeline is connected to the internal space of the sealed cover mechanism.

2. The production microenvironment device of sulfide all-solid-state battery according to claim 1, characterized in that: The production micro-environment device also includes a movable door assembly, which includes at least one movable door. The movable door and the sealing cover mechanism are locked and sealed by means of fluororubber sealing gaskets and sealant, and the hinges of the movable door are sealed by blocking welding.

3. The production microenvironment device of the sulfide all-solid-state battery according to claim 1 or 2, characterized in that: The sealing cover mechanism is provided with an equipment observation window, which is a transparent observation window made of antistatic modified corrosion-resistant polycarbonate, and the equipment observation window and the sheet metal of the sealing cover mechanism are sealed by a silicone pad.

4. The production microenvironment device of sulfide all-solid-state battery according to claim 1, characterized in that: The production micro-environment device also includes a PLC control cabinet, and the sealed cover fresh air mechanism includes a communication mechanism and a variable frequency fan, and the communication mechanism is electrically connected to the variable frequency fan and the PLC control cabinet respectively.

5. The production microenvironment device of sulfide all-solid-state battery according to claim 4, characterized in that: The sealing cover fresh air mechanism is distributed on the top of the machine cover of the sealing cover mechanism, and the sealing cover fresh air mechanism is equipped with a check valve.

6. The production microenvironment device of sulfide all-solid-state battery according to claim 1, characterized in that: The vacuum pipeline and the hydrogen sulfide exhaust pipeline are locked and sealed by flanges and fluororubber sealing gaskets, and the interior of the sealing cover mechanism is in a slightly negative pressure state.

7. The production microenvironment device of sulfide all-solid-state battery according to claim 1, characterized in that: The ratio of the gap leakage area to the overall surface area of ​​the production microenvironment device is less than or equal to 0.04%.

8. A control method, characterized in that: The production microenvironment device for a sulfide all-solid-state battery according to any one of claims 1 to 7, wherein the control method comprises: Acquiring sensor information of the production microenvironment device, wherein the sensor information includes one or more sensor information of a wind pressure sensor, a hydrogen sulfide sensor, and a dew point temperature sensor; Process the sensor information according to preset control logic to generate control instructions; The sealing cover fresh air mechanism and the isolation chamber fresh air mechanism are controlled according to the control instructions.

9. The control method according to claim 8, characterized in that: The step of controlling the sealing cover fresh air mechanism and the isolation chamber fresh air mechanism according to the control instruction includes: The sealing cover fresh air mechanism and the isolation chamber fresh air mechanism are respectively connected to a PLC control cabinet, and the PLC control cabinet controls the operation of the sealing cover fresh air mechanism and the isolation chamber fresh air mechanism according to preset working conditions and the control instructions.

10. The control method according to claim 9, characterized in that: The preset working conditions include continuous production working conditions, loading and unloading working conditions and accident working conditions. The production microenvironment device of the sulfide all-solid-state battery also includes an accident emergency exhaust fan. The steps of the PLC control cabinet controlling the operation of the sealing cover fresh air mechanism and the isolation chamber fresh air mechanism according to the preset working conditions and the control instructions include: Detecting the current operating condition of the production microenvironment device of the sulfide all-solid-state battery; If the current working condition is a continuous production condition, a first control instruction is generated, wherein the air supply volume of the fresh air mechanism of the sealing cover is less than the exhaust volume of the hydrogen sulfide exhaust pipeline; If the current working condition is the loading and unloading working condition, a second control instruction is generated, wherein the difference between the air supply volume of the fresh air mechanism of the sealing cover and the exhaust volume of the hydrogen sulfide exhaust pipe under the second control instruction is greater than a preset air volume value; If the current working condition is an accident working condition, a third control instruction is generated, wherein the air supply volume of the fresh air mechanism of the sealing cover is less than the total exhaust volume of the hydrogen sulfide exhaust pipeline and the exhaust volume of the accident emergency exhaust fan.

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