Gas circulation suction and exhaust device between charging and discharging of storage battery of subway train

Abstract

The invention provides a gas circulation suction and exhaust device for a charging and discharging room of a storage battery of a subway train. The gas circulation suction and exhaust device comprises one or more workbenches, an air suction system and a monitoring system. The workbench is arranged in the storage battery charging room, and the storage battery is placed on the workbench for charging and discharging. The air suction system comprises an air suction cover set, an air channel and a gas processing subsystem, the air suction cover set is arranged above the workbench, the air channel is arranged above the air suction cover set, and the air channel is communicated with the air suction cover set. One part of the air duct is located in the storage battery charging room, the other part of the air duct and the gas processing subsystem are both located outside the storage battery charging room, the other part of the air duct is communicated with the gas processing subsystem outdoors, and the gas processing subsystem is further communicated with an external main air duct. The monitoring system comprises a monitoring subsystem and a comprehensive control cabinet, the monitoring subsystem is arranged in a storage battery charging room, and the comprehensive control cabinet is arranged in a storage battery charging monitoring room.

Description

Technical Field

[0001] This invention relates to the field of battery gas treatment, and specifically to a gas circulation and exhaust device for the charging and discharging room of a subway train battery. Background Technology

[0002] In subway trains, the storage battery is one of the key components ensuring the normal operation and safety of the train. The main functions of the storage battery are: (1) Before the main power supply system of the train is turned on, it provides power for train activation. (2) In the event of a failure of the main power supply system of the train (no 1500V high voltage), the storage battery can provide emergency load for at least 45 minutes. The load includes: emergency lighting, emergency ventilation, on-board safety equipment, broadcasting, communication systems, and ensures the opening and closing of train doors. (3) When the overhead contact system of the 15A01 subway train fails (no 1500V high voltage in the overhead contact system), it can rely on the storage battery to provide power to the traction motor. The train can run at least 3 km under speed-limited conditions.

[0003] As batteries age, their system capacity gradually decreases, potentially failing to meet the daily operational needs of trains. Therefore, regular maintenance is essential to ensure battery stability and reliability. A key maintenance method is charge-discharge repair, which involves repeatedly charging and discharging the battery system with a constant current to restore some of its lost capacity. Generally, within the first five years of use, batteries are removed from the train, separated from the vehicle, and transported to a dedicated battery charging station for charge-discharge repair. This measure aims to restore and improve battery performance through professional maintenance. Regular charge-discharge of batteries is crucial for ensuring the safe and stable operation of trains. This not only ensures battery reliability but also effectively extends their lifespan, providing a solid power guarantee for the long-term operation of trains.

[0004] Currently, Shanghai Metro Line 15, as the first fully automated driving line at the GOA4 level to be put into operation in 2021, uses HOPPECKE HNCS rechargeable nickel-cadmium batteries (a type of nickel-cadmium battery based on sintering / plastic bonding technology, hereinafter referred to as HNCS battery) as its power source for its 15A01 metro trains. The 15A01 metro train has a total of 6 battery packs, with every 2 packs connected in series and installed under the TC1, M1, and TC2 cars respectively. TC1 and TC2 represent trailer cars with driver's cabs, while M1 represents drive cars without driver's cabs. Figure 1a and Figure 1b As shown, each battery pack contains 42 individual battery cells, all of which are connected together as a whole by relevant connecting strips and insulating accessories.

[0005] Because HNCS batteries use potassium hydroxide (KOH) and lithium hydroxide (LiOH) as their electrolyte, a mixture of oxygen and hydrogen is generated during the charging and repair process. When the hydrogen content of this mixture reaches 4% to 75.6%, it is highly susceptible to combustion and even explosion upon contact with a source of ignition, posing a significant safety risk. Furthermore, these batteries release a corrosive odor during charging, which not only threatens the health of employees but may also negatively impact the working environment. In addition, there is a risk of electrolyte leakage during charging. The cadmium in the electrolyte, if not properly treated, can severely pollute the land and cause long-term damage to the ecosystem. Therefore, during charge-discharge repair, staff must frequently visit the site to accurately measure the voltage of each individual battery and carefully check the electrolyte level of each battery. If insufficient electrolyte is detected, staff must manually add an appropriate amount of deionized water until the specified maximum level is reached.

[0006] However, the Line 15 subway train maintenance depot is located at the Yuanjiang Road depot, which has a covered design with the battery charging and discharging room situated beneath it, creating a relatively enclosed space. During battery charging and discharging operations, some flammable and corrosive gases are generated and cannot be expelled, posing a serious threat to the health of battery charging personnel and also presenting significant production safety hazards. Therefore, a dedicated battery room exhaust system needs to be constructed and installed immediately. Furthermore, audible and visual monitoring and alarm equipment should be installed in the work area to ensure timely detection and appropriate handling of any abnormalities. Summary of the Invention

[0007] To address the aforementioned problems, this invention provides a gas circulation and exhaust device for the charging and discharging room of subway train batteries. This device can effectively remove harmful gases generated during the charging and discharging process, ensuring a safe and hygienic working environment. It can also maximize the safety and reliability of the working environment in the battery charging room, ensuring the health and safety of the staff.

[0008] This invention provides a gas circulation and exhaust device for the charging and discharging room of a subway train battery, comprising:

[0009] One or more workbenches are provided in the battery charging room, and the batteries are placed on the workbenches for charging and discharging.

[0010] The suction system includes a suction hood assembly, an air duct, and a gas handling subsystem. The suction hood assembly is located above the workbench, and the air duct is located above the suction hood assembly and communicates with the suction hood assembly. A portion of the air duct is located in the battery charging room, and another portion of the air duct and the gas handling subsystem are both located outdoors in the battery charging room. The other portion of the air duct communicates with the gas handling subsystem outdoors, and the gas handling subsystem is also connected to the external main air duct to exhaust waste gas.

[0011] The monitoring system includes a monitoring subsystem and a comprehensive control cabinet. The monitoring subsystem acquires battery-related data in real time, including exhaust gas content and concentration, and battery status. The comprehensive control cabinet is connected to the monitoring subsystem and the ventilation system.

[0012] In one embodiment, the suction hood assembly includes one or more suction hoods, the air duct is a sealed pipe, and the bottom of the air duct has one or more first holes, the number of which is the same as the number of suction hoods. The first holes are used to connect the air duct to the suction hoods, and the other end of the air duct has a second hole, which is used to connect the air duct to a gas processing system.

[0013] In one embodiment, the gas handling subsystem includes a fan and a filter, the fan being connected to a second hole in the duct, the filter being connected to the fan, and the filter also being connected to an external main duct.

[0014] The fan adopts a dual-redundant design, and the two fans are switched between working modes by a ventilation regulator. The working modes include a first working mode and a second working mode.

[0015] First working mode:

[0016] Under normal operating conditions, only one fan is running, and the air volume generated by a single fan during normal operation is 5000 m³ / h. 3 / Hour;

[0017] When one of the fans fails, the ventilation regulator automatically switches to the other fan;

[0018] Second working mode:

[0019] When the alarm in the monitoring system is triggered, the ventilation regulator immediately starts another fan, and the two fans operate simultaneously, generating an air volume of no less than 7000 m³ / h. 3 / Hour.

[0020] In one embodiment, the filter includes a housing, a dust filter, and activated carbon, wherein the dust filter and activated carbon are assembled into a filter assembly, and the filter assembly is disposed inside the housing in the form of a push-pull drawer.

[0021] In one embodiment, the gas circulation and exhaust device for the charging and discharging chamber of the subway train battery further includes a suction hood assembly mounting frame, which is fixed inside the battery charging chamber, and the suction hood assembly is mounted on the suction hood assembly mounting frame.

[0022] In one embodiment, the suction hood assembly frame is assembled from several C-shaped channel beams. The C-shaped channel beams are used to arrange charging cables, and elongated holes are opened on the C-shaped channel beams so that the charging cables can reach the location of the battery through the elongated holes.

[0023] In one embodiment, a liquid collection tank is provided around the workbench, the liquid collection tank is connected to a conduit, and a liquid collection basin is provided at the end of the conduit.

[0024] In one embodiment, the monitoring subsystem includes: a gas monitoring and alarm unit and an explosion-proof video monitoring unit;

[0025] The gas monitoring and alarm unit includes:

[0026] Two gas quality monitoring sensors are installed at the lower right rear of the air intake hood assembly and at the entrance of the charging room, respectively. The gas quality monitoring sensors monitor the content and concentration of exhaust gas in the battery charging room in real time and send signals.

[0027] A gas quality monitoring host is installed in the battery charging monitoring room. The gas quality monitoring host is connected to two gas quality monitoring sensors. The gas quality monitoring host receives and processes the signals sent by the gas quality monitoring sensors in real time. The gas quality monitoring host contains an alarm. The alarm will issue an alarm signal when the exhaust gas concentration exceeds the standard. At the same time, the gas quality monitoring host is linked with the suction system. When the exhaust gas concentration exceeds the standard, the fan will automatically switch to the second working mode.

[0028] The explosion-proof video monitoring unit includes:

[0029] Two video cameras are installed on the lower left rear and lower right front of the air intake assembly, respectively, to obtain the battery status;

[0030] Two infrared flame and temperature cameras are installed on the lower right rear and lower left front of the air intake hood assembly, respectively. The infrared flame and temperature cameras acquire the battery temperature and flame. Each infrared flame and temperature camera is equipped with an alarm.

[0031] The video monitoring host is installed in the battery charging monitoring room. The video monitoring host is connected to two video cameras and two infrared flame and temperature cameras. The video monitoring host includes two alarms corresponding to the infrared flame and temperature cameras. When the infrared flame and temperature cameras detect that the battery is overheating or burning, the corresponding alarm will issue an alarm signal.

[0032] In one embodiment, the integrated control cabinet includes a cabinet, which is located in the battery charging monitoring room. A gas quality monitoring host and a video monitoring host are arranged in the cabinet. The cabinet also houses the fan electrical control equipment and the industrial control host. The industrial control host is connected to the gas quality monitoring host, the video monitoring host, and the fan electrical control equipment. A monitor is placed on the cabinet and is connected to the industrial control host. The monitor displays battery-related data.

[0033] The fan electrical control equipment includes four sets of air valves and air valve controllers, a fan control mode switch, and an emergency stop switch. The air valves are installed before and after each fan, the air valve controllers are installed on each air valve, and the fan control mode switch and emergency stop switch are installed on the cabinet. Both the fan control mode switch and emergency stop switch are connected to the fan. The fan control mode switch is used to adjust the working mode of the two fans.

[0034] In one embodiment, the battery charging room and the battery charging monitoring room are connected, and the battery charging room and the battery charging monitoring room are separated by tempered glass. The space outside the battery charging room and the battery charging monitoring room is outdoors.

[0035] The gas circulation and exhaust device for the charging and discharging chamber of a subway train battery of the present invention has the following beneficial effects:

[0036] 1) During the charging and discharging process, batteries produce flammable and toxic gases, posing a threat to the health of maintenance personnel and increasing safety hazards in the work area. The installation of a ventilation system effectively reduces the accumulation of these gases, thereby significantly lowering these risks. This measure not only protects the health of maintenance personnel but also reduces the likelihood of fire or explosion in the work area.

[0037] 2) If electrolyte leaks during charging and is not properly handled, it will not only pollute the environment but may also cause corrosive injuries to maintenance personnel. The practice of unified collection and centralized treatment of electrolyte not only effectively avoids environmental pollution but also ensures the safety of maintenance personnel.

[0038] 3) Monitoring systems provide a more scientific and effective means for workplace safety management. By monitoring the concentration of toxic and harmful gases in real time, potential safety hazards can be detected promptly; video surveillance can record the battery charging status in real time, assisting managers in remote monitoring and providing valuable evidence for accident investigations. Furthermore, monitoring abnormal battery temperatures is a crucial measure to prevent fires.

[0039] 4) The installation height of the suction hood assembly is designed with user-friendliness in mind, ensuring that charging personnel can easily perform various operations while avoiding potential head bumps or other safety accidents during operation. This design not only improves work efficiency but also further protects the personal safety of charging personnel. Attached Figure Description

[0040] Figure 1a This is a schematic diagram of a battery pack explosion.

[0041] Figure 1b This is a schematic diagram showing the connections between individual battery cells;

[0042] Figure 2 This is a schematic diagram of the gas circulation and exhaust device for the battery charging and discharging compartment of a subway train according to an embodiment of the present invention, in the battery charging compartment and the outdoor section.

[0043] Figure 3 This is a schematic diagram of the gas circulation and exhaust device for the battery charging and discharging room of a subway train according to an embodiment of the present invention, in the battery charging room, the battery charging monitoring room, and the outdoor section.

[0044] Figure 4 This is a schematic diagram of the installation frame of the suction hood assembly in the gas circulation suction and exhaust device for the charging and discharging room of a subway train battery according to an embodiment of the present invention.

[0045] Figure 5 This is a schematic diagram of the C-shaped channel beam used to assemble the suction hood assembly mounting frame in one embodiment of the present invention;

[0046] Figure 6 This is a schematic diagram illustrating the working principle of a gas treatment subsystem in one embodiment of the present invention;

[0047] Figure 7 This is a schematic diagram showing the arrangement of four workbenches in one embodiment of the present invention;

[0048] Figure 8 This is a schematic diagram of the structure of a workbench in one embodiment of the present invention;

[0049] Figure 9 This diagram shows the gas detection range of the explosion-proof gas quality monitoring sensor.

[0050] Figure 10This is a schematic diagram of the structure of a monitoring system according to an embodiment of the present invention;

[0051] Figure 11 This is a schematic diagram of the control principle of the air valve controller in one embodiment of the present invention;

[0052] Figure 12 This is a schematic diagram illustrating the control principle of the fan control mode switch in one embodiment of the present invention;

[0053] Figure 13 This is a PLC control diagram for a fan according to an embodiment of the present invention;

[0054] Figure 14 This is a circuit diagram of a fan control system according to an embodiment of the present invention.

[0055] Figure Labels

[0056] 1. Workbench; 11. Liquid collection tank; 12. Conduit; 13. Liquid collection basin; 2. Air duct; 3. Gas handling subsystem; 31. Fan; 32. Filter; 4. Suction hood; 5. Suction hood assembly mounting frame; 6. Video camera; 7. Gas quality monitoring sensor; 8. Infrared flame and temperature camera; 9. Integrated control console; 10. Bottom platform; 11. Monitoring workbench; A1. Battery charging room; A2. Battery charging monitoring room; A3. Outdoor. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0058] like Figure 2 and Figure 3As shown, this invention proposes a gas circulation and exhaust device for a subway train battery charging and discharging room, comprising: one or more workbenches 1, a suction system, and a monitoring system. The workbenches 1 are located in the battery charging room A1, and batteries are placed on the workbenches 1 for charging and discharging. The suction system includes a suction hood assembly, an air duct 2, and a gas handling subsystem 3. The suction hood assembly is located above the workbenches 1, and the air duct 2 is located above the suction hood assembly, communicating with it. A portion of the air duct is located in the battery charging room A1, while another portion of the air duct 2 and the gas handling subsystem are located outdoors in the battery charging room A3. The other portion of the air duct 2 communicates with the gas handling subsystem 3 outdoors in A3, and the gas handling subsystem 3 is also connected to an external main air duct to exhaust gas. The monitoring system includes a monitoring subsystem and a comprehensive control cabinet. The monitoring subsystem is located in the battery charging room A1 to acquire battery-related data in real time. The battery-related data includes waste content and concentration, and battery status. The integrated control cabinet is located in the battery charging monitoring room A2. The integrated control cabinet is connected to the monitoring subsystem and the ventilation system, and is used to control the ventilation system and receive relevant data from the battery.

[0059] Furthermore, the suction hood assembly includes one or more suction hoods 4. The duct 2 is a sealed pipe with one or more first holes at its bottom, the number of which is the same as the number of suction hoods 4. These first holes connect the duct to the suction hoods. A second hole is located at the end of another portion of the duct 2, connecting it to the gas handling system 3. Specifically, the second hole is 2500mm above the ground. The length of the portion of the duct 2 located in the battery charging room A1 is 5300mm, and the length of the other portion located outdoors is 14000mm. The duct 2 is connected to the external main air duct via the gas handling subsystem 3. Additionally, the duct 2 is made of corrosion-resistant 304 stainless steel, and its diameter is 500×500mm, sufficient to meet exhaust requirements.

[0060] In one embodiment, the suction hood assembly adopts a dual-body design, consisting of two suction hoods 4 installed side by side. Specifically, the total width of the suction hood assembly after installation is 3200mm, and the length is 5000mm. The height of the suction hood assembly from the ground after installation is approximately 2000mm, allowing charging personnel to stand and work under the hoods, thus ensuring the safety of employees. In this embodiment, the suction hoods 4 are made of 304 stainless steel.

[0061] Furthermore, the gas handling subsystem 3 includes a fan 31 and a filter 32, see [link to documentation]. Figure 3 The fan 31 is connected to the second hole on the air duct 2, and the filter 32 is connected to the fan 31 and also to the external main air duct. In this embodiment, the fan 31 adopts an explosion-proof fan design, and the fan shell is made of fiberglass, which can effectively prevent static electricity generated during motor operation. The main technical parameters are shown in Table 1 below.

[0062] Table 1 Technical parameters of the fan

[0063]

[0064]

[0065] In one specific embodiment, the fan 31 employs a dual-redundant design, with the switching between the two fans controlled by a ventilation regulator when operating independently. Under normal operating conditions, the ventilation regulator ensures that only one fan is running at any given time, and the airflow generated by a single fan during normal operation is 5000 m³ / h. 3 / hour. This design aims to ensure system energy efficiency and stable operation. When one fan fails, the ventilation controller will detect this and automatically switch to another fan to ensure system continuity and prevent disruption to air circulation within the work area. The airflow remains the same as a single fan, i.e., 5000 m³ / h. 3 / hour. However, when an indoor detection alarm is triggered, such as when excessive concentration of harmful gases or excessively high temperature is detected, the ventilation controller will receive this signal and immediately start another fan. At this time, both fans will run simultaneously to provide a larger air volume, ensuring that the air in the work area can be quickly circulated and exhausted. The ventilation volume generated at this time needs to reach no less than 7000 m³ / h. 3 / hour, thereby quickly circulating and expelling the gas in the work area.

[0066] Furthermore, filter 32 includes: a housing, a dust filter, and activated carbon. The dust filter and activated carbon are assembled into a filter assembly, which is housed inside the housing in the form of a push-pull drawer. The dust filter effectively adsorbs dust from the air before the activated carbon filters, making the activated carbon more efficient. In this embodiment, as... Figure 6 As shown, the working principle of the gas treatment subsystem 3 is as follows: Waste gas is powered by the fan 31 and enters the filter 32 under positive or negative pressure. Due to the unbalanced and unsaturated molecular attraction or chemical bonding forces on the surface of the activated carbon in the filter 32, when this solid surface comes into contact with the gas, it attracts gas molecules, causing them to concentrate and remain on the solid surface, thus adsorbing the pollutants. After passing through the filter, the waste gas enters the activated carbon adsorption tower, and the purified gas is discharged at high altitude in compliance with standards. It should be noted that the adsorption capacity of activated carbon is limited, and it will gradually become saturated over time. Therefore, it is necessary to replace or regenerate the activated carbon regularly to ensure the continuous and efficient operation of the waste gas treatment equipment. The push-pull drawer design facilitates the replacement of activated carbon.

[0067] This activated carbon filter is an environmentally friendly device for purifying waste gas and adsorbing odors. It boasts advantages such as high adsorption efficiency, wide applicability, easy maintenance, and the ability to simultaneously treat multiple mixed waste gases. Activated carbon itself removes harmful gases such as formaldehyde, benzene, and TVOCs, and also disinfects and deodorizes. Activated carbon adsorption is widely used in waste gas treatment in industries such as electronic component manufacturing, battery production, pickling operations, laboratory exhaust, metallurgy, chemical engineering, pharmaceuticals, coating, food processing, and waste transfer stations. Specifically, activated carbon is a black, powdery, granular, or pellet-shaped amorphous porous carbon. Its main component is carbon, and it also contains small amounts of oxygen, hydrogen, sulfur, nitrogen, and chlorine. Activated carbon also has a fine structure similar to graphite, but with smaller crystals and irregularly stacked layers. Activated carbon has a large surface area (500–1000 m² / g) and a strong adsorption capacity, capable of adsorbing gases, liquids, or colloidal solids on its surface. The adsorption capacity for gases and liquids can approach the mass of the activated carbon itself. Activated carbon exhibits selective adsorption, readily adsorbing non-polar substances more readily than polar substances. Within the same series of substances, those with higher boiling points are more easily adsorbed; higher pressure, lower temperature, and higher concentration result in greater adsorption capacity, while lower pressure and higher temperature favor desorption. Activated carbon filters are particularly suitable for operating environments with low-concentration, high-volume emissions or high-concentration, intermittent emissions of waste gas.

[0068] Specifically, the outer shell is made of 304 stainless steel, and the internal activated carbon is honeycomb block activated carbon, with a total of 80 blocks used. The specific technical parameters of filter 32 are shown in Table 2 below:

[0069] Table 2 Specific technical parameters of the filter

[0070]

[0071] Furthermore, the gas circulation and exhaust device for the battery charging and discharging room of the subway train also includes a suction hood assembly mounting frame 5, see [link / reference]. Figure 4 .like Figure 2 As shown, the suction hood assembly mounting frame 5 is fixed inside the battery charging room A1 and is used to install the suction hood assembly.

[0072] Furthermore, such as Figure 4 and Figure 5 As shown, the suction hood assembly frame 5 adopts a hollow design and is assembled from several C-shaped channel beams. The C-shaped channel beams are used to arrange charging cables. Elongated holes are opened on the C-shaped channel beams, through which the charging cables reach the battery location. (See [reference]). Figure 5 This arrangement of charging cables creates an orderly look and ensures safety.

[0073] Furthermore, such as Figure 8As shown, a liquid collection tank 11 is provided around the workbench 1, and the liquid collection tank 11 is connected to the conduit 12. A liquid collection basin 13 is provided at the end of the conduit 12. Specifically, the liquid collection tank 11, formed by bending around the workbench 1, is used to guide the overflowing electrolyte to the conduit 12. The liquid collection basin 13 at the end of the conduit 12 is used to collect the liquid for centralized treatment, thus protecting the environment. In this embodiment, the liquid collection basin 13 is made of 304 stainless steel.

[0074] All workbenches 1 are made of 304 stainless steel. In one specific embodiment, such as Figure 7 As shown, the gas circulation and exhaust device for the subway train battery charging and discharging room includes four workbenches 1. Two workbenches are 400×2500mm in size, and the other two are 900×2500mm in size. One 900×2500mm workbench can hold three battery packs, and two 900×2500mm workbenches can hold six battery packs, allowing for simultaneous charging and discharging of one train of batteries. The 400×2500mm workbench can hold a single battery for charging and repair. The specific parameters of the workbenches are shown in Table 3 below.

[0075] Table 3 Specific parameters of the worktable

[0076] Serial Number Parameter name unit quantity 1 Workbench 400 indivual 2 2 Workbench 900 indivual 2 3 Liquid delivery tube rice 5 4 Catch basin indivual 2

[0077] As described above, the monitoring system includes a monitoring subsystem and a comprehensive control cabinet. In one embodiment, the monitoring system is structured as follows: Figure 10 As shown. Specifically, the monitoring subsystem includes: a gas monitoring and alarm unit and an explosion-proof video monitoring unit. The gas monitoring and alarm unit includes: two gas quality monitoring sensors 7 and a gas quality monitoring host. The two gas quality monitoring sensors 7 are respectively installed at the lower right rear of the exhaust hood assembly and at the entrance of the battery charging room A1, thus covering the detection of exhaust gas content across the entire battery. See [link to documentation]. Figure 3 The gas quality monitoring sensor 7 monitors the content and concentration of exhaust gas in the battery charging room A1 in real time (in this embodiment, the exhaust gas mainly targets hydrogen) and sends a signal. In this embodiment, the gas detection range of the gas quality monitoring sensor 7 is described in [reference needed]. Figure 9The gas quality monitoring host is installed in the battery charging monitoring room A2. It is connected to two gas quality monitoring sensors 7, receiving and processing signals from these sensors in real time. The host includes an alarm that sounds and lights when the exhaust gas concentration exceeds the standard, alerting personnel to evacuate the site. Simultaneously, an air quality monitoring host in the monitoring room also provides an audible and visual alarm. The gas quality monitoring host is linked to the ventilation system; when the exhaust gas concentration exceeds the standard, the fan automatically switches to a second operating mode, increasing exhaust output to quickly reduce the concentration. Specifically, the gas quality monitoring sensors 7 are connected to the gas quality monitoring host, which in turn connects to the integrated control cabinet. Once the alarm sounds, the battery charging power is first cut off, and simultaneously, the ventilation is increased to quickly expel the gas that triggered the alarm.

[0078] The explosion-proof video monitoring unit includes: two video cameras 6 and two infrared flame and temperature cameras 8, see [link / reference]. Figure 10 Video-assisted monitoring is used in battery charging room A1 to observe and record the battery charging status in real time. At the same time, it can also monitor abnormal battery temperatures to prevent fires.

[0079] Two video cameras 6 are respectively installed at the lower left rear and lower right front of the air intake assembly. The video cameras 6 acquire the battery status, see [link / reference]. Figure 3 When maintenance personnel encounter blind spots while visually monitoring the battery charging room during the charging process, they can observe the battery status through a monitor installed on the integrated control cabinet. Video footage acquired by video camera 6 can be viewed and recorded in real time.

[0080] Two infrared flame and temperature cameras 8 are respectively installed at the lower right rear and lower left front of the suction hood assembly, thus covering the entire battery charging area. The infrared flame and temperature cameras acquire the battery temperature and flame. In this embodiment, the infrared flame and temperature cameras are dual-spectrum thermal imaging infrared high-definition explosion-proof cameras, an integrated two-in-one high-definition camera with 4-megapixel high-definition video, and simultaneously possess infrared flame alarm, high-temperature alarm, fire visualization, audible and visual alarm, intelligent detection, fire point location and identification, and adjustable sensitivity functions. In one embodiment, an infrared flame and temperature camera 8 is also installed in the middle of the suction hood assembly, see [link to relevant documentation]. Figure 2 and Figure 3 .

[0081] The explosion-proof video surveillance unit also includes a video surveillance host, which is installed in the battery charging monitoring room A2. The video surveillance host is connected to two video cameras 6 and two infrared flame and temperature cameras 8. The video surveillance host contains two alarms corresponding to the infrared flame and temperature cameras 8. When the infrared flame and temperature camera 8 detects overheating or flames in the battery, the alarm of that camera will sound an audible and visual alarm, and at the same time, the corresponding alarm in the monitoring room will also sound an alarm signal, providing an audible and visual alarm.

[0082] Furthermore, the integrated control cabinet 9 includes a cabinet body located in the battery charging monitoring room A2. The gas quality monitoring host and video monitoring host are housed within the cabinet body. The cabinet body also houses the fan electrical control equipment and an industrial control host, which is connected to the gas quality monitoring host, video monitoring host, and fan electrical control equipment. A monitor is mounted on the cabinet body and connected to the industrial control host, displaying battery-related data. In one embodiment, the cabinet body is 1250mm long, 960mm wide, and 830mm high. The industrial control host is an ECI-430 commercial industrial computer, configured with: CPU i7-7700 / 8GB RAM / 256GB SSD + 4TB HDD / six serial ports. The video monitoring host is located inside the right side of the control panel and has a USB port for downloading and saving video data. If the video monitoring host and gas quality monitoring host are connected to a network, they can also be accessed via the network. The monitor is a 27-inch display, primarily showing real-time battery charging temperature and fire conditions; allowing users to select the appropriate camera and video segment from the upper left camera list to monitor battery status in real time; displaying the concentration of exhaust gas in the charging room in real time; and displaying the fan operation status in real time. Furthermore, the monitor can replay relevant data and videos.

[0083] The wind turbine electrical control equipment includes four sets of air valves and air valve controllers, a wind turbine control mode switch, and an emergency stop switch. (See attached image.) Figure 10 Air dampers are installed before and after each fan to close or open the air duct. In one embodiment, the air damper size is 500×500mm. An air damper controller is installed on each air damper to control it. The air damper controller is a 6-wire AC 220V controller. Terminals 1, 2, and 3 control the opening and closing of the air damper; terminal 1 is the common control terminal, terminal 2 controls the air damper to open, and terminal 3 controls the air damper to close. Terminals 4, 5, and 6 are the feedback outputs of the air damper's status signal; terminal 4 is the common signal line, terminal 5 is the fully open signal, and terminal 6 is the fully open signal. See the control principle diagram. Figure 11Air valve opening: When AC220V power is available at terminals 1 and 2, the motor is energized and rotates forward, opening the air valve. When the air valve is fully open, the normally closed contact between terminals 1 and 2 opens, the motor stops rotating forward, and the normally open contact between terminals 4 and 5 closes. Air valve closing: When AC220V power is available at terminals 1 and 3, the motor is energized and rotates in reverse. The original contact between terminals 4 and 5 returns to the open state. When the air valve is fully closed, the air valve closes, the normally closed contact between terminals 1 and 3 opens, the motor stops rotating in reverse, and the normally open contact between terminals 4 and 6 closes.

[0084] The fan control mode switch is mounted on the cabinet and is used to adjust the operating mode of the two fans. The emergency stop switch is also mounted on the cabinet for emergency shutdown of the fans. Both the fan control mode switch and the emergency stop switch are physical toggle switches, which more closely resembles normal operation and prevents operational errors. Especially in emergencies, the emergency stop switch can be pressed. The fan control mode switch has three positions and is a self-locking toggle switch: 0 for stop, 1 for automatic fan operation, and 2 for manual fan operation. See [link / reference]. Figure 12 .

[0085] The electrical control equipment for wind turbines also includes PLCs, contactors, relays, thermal relays, and so on. Figure 13 This is a PLC control diagram for the fan. Figure 14 This is the circuit diagram for the fan control system. Specifically:

[0086] 1) When the fan control mode switch is set to 0, the coils KA1-KA6 on the fan PLC control diagram are not energized. The 1 and 2 terminals of the exhaust fan 1 valve 1 controller, exhaust fan 1 valve 2 controller, exhaust fan 2 valve 3 controller, and exhaust fan 2 valve 4 controller on the fan control circuit diagram have AC220V power. The motor is energized and rotates forward, and the valves open. When the valves are fully open, the normally closed contact between terminals 1 and 2 opens, the motor stops rotating forward, and the normally open contact between terminals 4 and 5 closes and sends a signal to the PLC. At this time, the green indicator light for the valves 1, 2, 3, and 4 is lit (the valve opening indicator light is a virtual indicator light on the display screen). Fans 1 and 2 do not run (the green running virtual indicator light is also not lit).

[0087] 2) Fan Start-up: With the fan control mode switch set to position 1 (automatic fan operation), when the air valves are fully open, the relay coils KA5 and KA6 of the air valve 3 and 4 controllers on the PLC control diagram are energized (program control). The air valve 3 and 4 controllers on the fan control circuit diagram have AC220V power at terminals 1 and 3. When the motor is energized, it reverses, and the air valves close. When the air valves are fully closed, the normally closed contact between terminals 1 and 3 opens, the motor stops reversing, and the normally open contact between terminals 4 and 6 closes, sending a signal to the PLC. At this time, the red indicator lights for air valve 3 and 4 illuminate (the air valve closure indicator light is a virtual indicator light on the display screen). After 10 seconds, the coil of relay KA1 of exhaust fan 1 on the PLC control diagram is energized and engages (program control). The KA1 contact on the fan control circuit diagram closes, the coil of contactor KM1 of exhaust fan 1 is energized, the three-phase contacts of contactor KM1 close and conduct, and the exhaust fan 1 motor is energized and runs. When the normally open auxiliary contact of contactor KM1 on the PLC control diagram closes, the green indicator light for fan 1 illuminates (the indicator light is a virtual indicator light on the display screen).

[0088] When the exhaust fan 1 motor has been running for more than 4 hours, and the fan control mode switch is set to position 1 again, when the air valve is fully open, the relay coils KA3 and KA4 of the air valve 1 and 2 controllers on the PLC control diagram are energized (program control). The air valve 1 and 2 controllers on the fan control circuit diagram have AC220V power at terminals 1 and 3. When the motor is energized, it reverses, and the air valve closes. When the air valve is fully closed, the normally closed contact between terminals 1 and 3 opens, the motor stops reversing, and the normally open contact between terminals 4 and 6 closes, sending a signal to the PLC. At this time, the red indicator lights for the air valve closure of air valve 1 and air valve 2 illuminate (the air valve closure indicator light is a virtual indicator light on the display screen). After 10 seconds, the coil of the exhaust fan 2 relay KA2 on the PLC control diagram is energized and engages (program control). The KA2 contact on the fan control circuit diagram closes, the coil of the exhaust fan 2 contactor KM2 is energized, the three-phase contacts of contactor KM2 close and conduct, and the exhaust fan 2 motor is energized and runs. When the normally open auxiliary contact of contactor KM2 on the PLC control diagram closes, the green indicator light for fan 2 illuminates (this indicator light is virtual and displayed on the screen). Similarly, if exhaust fan 2 has been running for more than 4 hours, and the fan control mode switch is returned to position 1, it will switch to exhaust fan 1. This alternating operation of the two fans can extend the motor's lifespan.

[0089] When a certain exhaust fan motor is overloaded (such as exhaust fan 2), the three-phase thermal relay FR2 on the fan control circuit diagram will trip, the three-phase contacts of the three-phase thermal relay FR2 will open, and the exhaust fan motor will stop running. The normally open contact of FR2 on the PLC control diagram will close, the KA2 coil will be de-energized (program control), the red fault indicator light for fan 2 will illuminate (the indicator light is a virtual indicator light on the display screen), and at the same time, the relay coils KA5 and KA6 will be energized (program control), closing air valves 3 and 4, de-energizing coils KA3 and KA4, opening air valves 1 and 2, and exhaust fan 1 will start running.

[0090] When the PLC receives a message that the air quality exceeds the standard, it will simultaneously run two exhaust fans.

[0091] 3) When the fan control mode switch is set to position 2 (manual operation), coils KA1-KA6 on the PLC control diagram should not be energized. Terminals 1 and 2 of the exhaust fan 1 valve 1 controller, exhaust fan 1 valve 2 controller, exhaust fan 2 valve 3 controller, and exhaust fan 2 valve 4 controller on the fan control circuit diagram should have AC 220V power. The motor should rotate forward, opening the valves. When the valves are fully open, the normally closed contact between terminals 1 and 2 should open, stopping the motor's forward rotation. The normally open contact between terminals 4 and 5 should then close. The signal is sent to the PLC. At this time, the green indicator lights for the valves 1, 2, 3, and 4 (the valve opening indicator lights are virtual and displayed on the screen) illuminate. After 10 seconds, the coils of relays KA1 and KA2 for exhaust fans 1 and 2 on the PLC control diagram are energized and engaged (program control). The contacts KA1 and KA2 on the fan control circuit diagram close, the coils of contactors KM1 and 2 for exhaust fans 1 and 2 are energized, the three-phase contacts of contactors KM1 and 2 close and conduct, and the motors of exhaust fans 1 and 2 are energized and run. The auxiliary normally open contacts of contactors KM1 and 2 on the PLC control diagram close, and the green indicator lights for the operation of fans 1 and 2 illuminate (the indicator lights are virtual and displayed on the screen).

[0092] When a certain exhaust fan motor is overloaded (such as exhaust fan 2), the three-phase thermal relay FR2 on the fan control circuit diagram will trip, the three-phase contacts of the three-phase thermal relay FR2 will open, and the exhaust fan 2 motor will stop running. The normally open contact of FR2 on the PLC control diagram will close, the KA2 coil will be de-energized (program control), the red fault indicator light for fan 2 will illuminate (the indicator light is a virtual indicator light on the display screen), and at the same time, the relay coils KA5 and KA6 will be energized (program control), closing the air valves 3 and 4.

[0093] It should be understood that the exhaust fan mentioned above is a fan.

[0094] Furthermore, the battery charging room A1 and the battery charging monitoring room A2 are connected, separated by tempered glass. The external space of both the battery charging room A1 and the battery charging monitoring room A2 is outdoor space A3. Specifically, the tempered glass is 3000mm in size and 2000mm in height. During the charging process, maintenance personnel visually monitor the process from the battery charging monitoring room A2, without entering the battery charging room A1, effectively preventing the possible inhalation of harmful gases and protecting the health of maintenance personnel. The gas treatment subsystem (fan 21 and filter 32) is placed outdoors in A3, which reduces noise and facilitates cleaning and replacement of the activated carbon adsorption equipment and filter. In one embodiment, such as... Figure 3 As shown, the battery charging monitoring room also includes a base platform and a customer workbench. The base platform facilitates cabling, avoiding messy and disorderly cables and improving overall aesthetics and safety. The customer workbench is typically positioned at a suitable height, allowing staff to clearly observe the battery charging status and the operation of monitoring equipment. This design helps to promptly detect anomalies and take appropriate measures, ensuring the safe and reliable battery charging process.

[0095] It should be noted that, unless otherwise explicitly specified and limited, terms such as “installation,” “setting,” and “connection” used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal connection of two components. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0096] After one year of use, the gas circulation and exhaust device for the battery charging and discharging room of the subway train has demonstrated good performance and stable operation, indicating that the device has achieved significant results in practical applications and provides strong protection for the safety management of the battery charging and discharging room. Specifically, the gas circulation and exhaust device for the battery charging and discharging room of the subway train of the present invention has the following beneficial effects:

[0097] 1) During the charging and discharging process, batteries produce flammable and toxic gases, posing a threat to the health of maintenance personnel and increasing safety hazards in the work area. The installation of a ventilation system effectively reduces the accumulation of these gases, thereby significantly lowering these risks. This measure not only protects the health of maintenance personnel but also reduces the likelihood of fire or explosion in the work area.

[0098] 2) If electrolyte leaks during charging and is not properly handled, it will not only pollute the environment but may also cause corrosive injuries to maintenance personnel. The practice of unified collection and centralized treatment of electrolyte not only effectively avoids environmental pollution but also ensures the safety of maintenance personnel.

[0099] 3) Monitoring systems provide a more scientific and effective means for workplace safety management. By monitoring the concentration of toxic and harmful gases in real time, potential safety hazards can be detected promptly; video surveillance can record the battery charging status in real time, assisting managers in remote monitoring and providing valuable evidence for accident investigations. Furthermore, monitoring abnormal battery temperatures is a crucial measure to prevent fires.

[0100] 4) The installation height of the suction hood assembly is designed with user-friendliness in mind, ensuring that charging personnel can easily perform various operations while avoiding potential head bumps or other safety accidents during operation. This design not only improves work efficiency but also further protects the personal safety of charging personnel.

[0101] The embodiments described above are merely further illustrations of the present invention and are not intended to limit the present invention in any other way. The present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding modifications and changes based on the present invention, but all such modifications and changes should fall within the protection scope of the present invention.

Claims

1. A gas circulation and exhaust device for the charging and discharging room of a subway train battery, characterized in that, include: One or more workbenches are provided in the battery charging room, and the batteries are placed on the workbenches for charging and discharging. The suction system includes a suction hood assembly, an air duct, and a gas handling subsystem. The suction hood assembly is located above the workbench, and the air duct is located above the suction hood assembly and communicates with the suction hood assembly. A portion of the air duct is located in the battery charging room, and another portion of the air duct and the gas handling subsystem are both located outdoors in the battery charging room. The other portion of the air duct communicates with the gas handling subsystem outdoors, and the gas handling subsystem is also connected to the external main air duct to exhaust waste gas. The monitoring system includes a monitoring subsystem and a comprehensive control cabinet. The monitoring subsystem acquires battery-related data in real time, including exhaust gas content and concentration, and battery status. The comprehensive control cabinet is connected to the monitoring subsystem and the ventilation system.

2. The gas circulation and exhaust device for the charging and discharging room of a subway train battery according to claim 1, characterized in that, The suction hood assembly includes one or more suction hoods, the air duct is a sealed pipe, and the bottom of the air duct has one or more first holes, the number of which is the same as the number of suction hoods. The first holes are used to connect the air duct to the suction hoods. The other part of the air duct has a second hole at its end, which is used to connect the air duct to the gas processing system.

3. The gas circulation and exhaust device for the charging and discharging room of a subway train battery according to claim 2, characterized in that, The gas handling subsystem includes a fan and a filter. The fan is connected to a second hole in the duct, the filter is connected to the fan, and the filter is also connected to the external main duct. The fan adopts a dual-redundant design, and the two fans are switched between working modes by a ventilation regulator. The working modes include a first working mode and a second working mode. First working mode: Under normal operating conditions, only one fan is running, and the air volume generated by a single fan during normal operation is 5000 m³ / h. 3 / Hour; When one of the fans fails, the ventilation regulator automatically switches to the other fan; Second working mode: When the alarm in the monitoring system is triggered, the ventilation regulator immediately starts another fan, and the two fans operate simultaneously, generating an air volume of no less than 7000 m³ / h. 3 / Hour.

4. The gas circulation and exhaust device for the charging and discharging room of a subway train battery according to claim 3, characterized in that, The filter includes a housing, a dust filter, and activated carbon. The dust filter and activated carbon are assembled into a filter assembly, which is located inside the housing in the form of a push-pull drawer.

5. The gas circulation and exhaust device for the charging and discharging room of a subway train battery according to claim 1, characterized in that, The gas circulation and exhaust device for the battery charging and discharging compartment of the subway train also includes a suction hood assembly mounting frame, which is fixed inside the battery charging compartment, and the suction hood assembly is mounted on the suction hood assembly mounting frame.

6. The gas circulation and exhaust device for the charging and discharging room of a subway train battery according to claim 5, characterized in that, The suction hood assembly frame is assembled from several C-shaped channel beams. The C-shaped channel beams are used to arrange charging cables. The C-shaped channel beams have elongated holes through which the charging cables reach the battery.

7. The gas circulation and exhaust device for the charging and discharging room of a subway train battery according to claim 1, characterized in that, The workbench is surrounded by a liquid collection tank, which is connected to a conduit. A liquid collection basin is provided at the end of the conduit.

8. The gas circulation and exhaust device for the charging and discharging room of a subway train battery according to claim 3, characterized in that, The monitoring subsystem includes: a gas monitoring and alarm unit and an explosion-proof video monitoring unit; The gas monitoring and alarm unit includes: Two gas quality monitoring sensors are installed at the lower right rear of the air intake hood assembly and at the entrance of the charging room, respectively. The gas quality monitoring sensors monitor the content and concentration of exhaust gas in the battery charging room in real time and send signals. A gas quality monitoring host is installed in the battery charging monitoring room. The gas quality monitoring host is connected to two gas quality monitoring sensors. The gas quality monitoring host receives and processes the signals sent by the gas quality monitoring sensors in real time. The gas quality monitoring host contains an alarm. The alarm will issue an alarm signal when the exhaust gas concentration exceeds the standard. At the same time, the gas quality monitoring host is linked with the suction system. When the exhaust gas concentration exceeds the standard, the fan will automatically switch to the second working mode. The explosion-proof video monitoring unit includes: Two video cameras are installed on the lower left rear and lower right front of the air intake assembly, respectively, to obtain the battery status; Two infrared flame and temperature cameras are installed on the lower right rear and lower left front of the air intake hood assembly, respectively. The infrared flame and temperature cameras acquire the battery temperature and flame. Each infrared flame and temperature camera is equipped with an alarm. The video monitoring host is installed in the battery charging monitoring room. The video monitoring host is connected to two video cameras and two infrared flame and temperature cameras. The video monitoring host includes two alarms corresponding to the infrared flame and temperature cameras. When the infrared flame and temperature cameras detect that the battery is overheating or burning, the corresponding alarm will issue an alarm signal.

9. The gas circulation and exhaust device for the charging and discharging room of a subway train battery according to claim 8, characterized in that, The integrated control cabinet includes a cabinet, which is located in the battery charging monitoring room. The gas quality monitoring host and video monitoring host are arranged inside the cabinet. The cabinet also houses the fan electrical control equipment and the industrial control host. The industrial control host is connected to the gas quality monitoring host, video monitoring host and fan electrical control equipment. A monitor is placed on the cabinet and is connected to the industrial control host. The monitor displays battery-related data. The fan electrical control equipment includes four sets of air valves and air valve controllers, a fan control mode switch, and an emergency stop switch. The air valves are installed before and after each fan, the air valve controllers are installed on each air valve, and the fan control mode switch and emergency stop switch are installed on the cabinet. Both the fan control mode switch and emergency stop switch are connected to the fan. The fan control mode switch is used to adjust the working mode of the two fans.

10. The gas circulation and exhaust device for the charging and discharging room of a subway train battery according to claim 1, characterized in that, The battery charging room and the battery charging monitoring room are connected and separated by tempered glass. The space outside the battery charging room and the battery charging monitoring room is outdoors.

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