New energy automobile chassis battery fire disposal method and system

Abstract

This invention discloses a method and system for handling battery fires in the chassis of new energy vehicles. The method includes: remotely controlling a fireproof isolation cover housed on the vehicle to automatically deploy and cover the burning vehicle to form a closed space; controlling a mobile fire extinguishing unit to automatically release to the bottom area of ​​the vehicle; extracting smoke from the closed space, spraying and purifying it before discharging, and collecting the washing waste liquid; controlling the mobile fire extinguishing unit to spray extinguishing media upwards to impact the battery pack, and collecting the falling extinguishing waste liquid; purifying and forcibly cooling the washing waste liquid and extinguishing waste liquid; and pressurizing and transporting the cooled water back to the top and bottom spray nozzles to form bidirectional continuous cooling. This invention achieves remote, unmanned deployment of fire extinguishing operations, integrating smoke purification and wastewater regeneration through a gas-liquid dual closed-loop circulation system, controlling the discharge of toxic substances, and has significant safety and environmental benefits.

Description

Technical Field

[0001] This invention relates to the field of fire rescue and extinguishing, and in particular to a method and system for handling fires involving the chassis batteries of new energy vehicles. Background Technology

[0002] In recent years, with the popularization of new energy vehicles, fire accidents caused by power batteries have been increasing. Unlike fires in traditional fuel vehicles, fires in new energy vehicle batteries are characterized by rapid fire spread, a high risk of thermal runaway, and the production of large amounts of toxic and harmful gases during combustion.

[0003] Currently, conventional fire rescue methods typically involve spraying large amounts of external water for cooling. However, existing technology has the following significant drawbacks: 1) Power batteries are mostly installed in the vehicle chassis and have a thick protective shell. External water jets cannot directly reach the inside of the burning battery pack, resulting in extremely low cooling efficiency. It often takes tens or even hundreds of tons of water to completely extinguish the fire, which is a huge waste of water resources.

[0004] 2) The large amount of wastewater generated during the firefighting process is mixed with heavy metals, electrolytes and toxic substances leaked from the battery. This wastewater usually flows directly into the city’s pipe network or soil, causing serious secondary environmental pollution.

[0005] 3) The high concentration of highly toxic fumes generated by the battery combustion spread rapidly in open spaces, posing a great threat to the lives and health of nearby residents and on-site rescue personnel.

[0006] Therefore, there is an urgent need for a comprehensive fire treatment method and equipment for new energy vehicles that can accurately extinguish fires on the chassis, prevent the spread of toxic gases, and enable the recycling of extinguishing media to eliminate secondary pollution. Summary of the Invention

[0007] To address the aforementioned problems, this invention proposes a method for handling fires in the chassis batteries of new energy vehicles, comprising the following steps: S1, by sending instructions through the control terminal connected to the transport vehicle, the fireproof isolation cover stored on the transport vehicle is automatically deployed and covers the burning vehicle to form a closed space, and the mobile fire extinguishing unit stored on the transport vehicle is automatically released to the bottom area of ​​the burning vehicle. S2, spray fire extinguishing medium onto the burning vehicle inside the fireproof isolation cover, draw in the smoke in the enclosed space, wash and purify the smoke before discharging it, and collect the washing waste liquid generated during the washing and purification process. S3, control the mobile fire extinguishing unit to spray fire extinguishing medium onto the burning vehicle chassis battery, and collect the fire extinguishing waste liquid that falls back after spraying; S4, the collected washing waste liquid and fire extinguishing waste liquid are purified, and the purified liquid is cooled. S5, pressurize the cooled liquid and send it back to the fireproof isolation cover to spray it onto the burning vehicle, and at the same time send it back to the mobile fire extinguishing unit to continue spraying it onto the chassis battery of the burning vehicle.

[0008] In one embodiment, the automatic deployment of the fireproof isolation cover in step S1 specifically includes: In response to instructions from the control terminal, the folded fireproof isolation cover was hoisted to the top of the burning vehicle; Triggering the telescopic drive mechanism integrated on the fireproof isolation cover, the telescopic drive mechanism drives the telescopic column of the fireproof isolation cover to extend downward, thereby causing the fireproof cover cloth of the fireproof isolation cover to unfold until the bottom support frame of the fireproof isolation cover touches the ground.

[0009] In one embodiment, the automatic release of the mobile fire extinguishing unit in step S1 specifically includes: In response to instructions from the control terminal, the storage compartment installed on the transport vehicle is opened, and the ramp installed in the storage compartment is released. Control the mobile fire extinguishing unit to autonomously travel along the ramp to the bottom of the burning vehicle.

[0010] In one embodiment, the control terminal in S1 is an on-board control panel located in the driver's cab of the transport vehicle, through which an operator sends commands from the driver's cab.

[0011] In one embodiment, the control terminal in S1 is a remote operating platform separate from the transport vehicle, and the transport vehicle is an unmanned vehicle. The operator sends instructions through a wireless communication network on the remote operating platform.

[0012] In one embodiment, step S2 specifically includes: Spray cooling liquid onto the drawn-out flue gas to cool it down and wash away impurities; The flue gas after spray washing is separated from the solid-liquid mixture formed during the washing process, and the solid precipitate and primary washing waste liquid are intercepted and collected. The separated flue gas is passed into the chemical absorbent liquid for a bubbling reaction, and the gas distribution method is used to make the gas flow density in the middle region greater than that in the two sides, driving the absorbent liquid to form a liquid circulation from the middle to both sides. The solid precipitate generated by the bubbling reaction is transported to the static area for settling through the liquid circulation, and the waste liquid containing the precipitate is automatically discharged when the static pressure generated by the precipitate reaches a preset threshold. The flue gas after chemical absorption is cooled to condense the water vapor into liquid water, which is then collected. The dehumidified flue gas is adsorbed and filtered to remove residual toxins, and then the clean gas is discharged. The primary washing waste liquid and the waste liquid containing precipitates together constitute the washing waste liquid generated in the washing and purification process described in S2.

[0013] In one embodiment, the upward spraying of the mobile fire extinguishing unit in S3 specifically includes: Distance data between the burning vehicle chassis and the surface of the mobile fire extinguishing unit is collected by sensors placed around the mobile fire extinguishing unit. The upward spray angle of the mobile fire extinguishing unit is adaptively adjusted based on the distance data to maintain the water jet in contact with the bottom of the chassis battery.

[0014] In one embodiment, S3 further includes: Real-time detection of ground leakage current in the water accumulation area at the bottom of the mobile fire extinguishing unit; When the leakage current is detected to exceed a preset threshold, the spray mode of the mobile fire extinguishing unit is forcibly switched to a fan-shaped atomization mode.

[0015] In one embodiment, S4 specifically includes: The mixed waste liquid containing the washing waste liquid and the fire extinguishing waste liquid is introduced into the first pipeline; Real-time monitoring of the pressure or temperature within the first pipeline; When abnormal pressure or excessively high temperature is detected, the flow path of the mixed waste liquid is automatically switched from the first pipeline to the second pipeline that is connected in parallel with the first pipeline. It also performs heat exchange on the flowing mixed waste liquid to achieve primary cooling; The waste liquid, after primary cooling, is pumped to a reaction sedimentation tank to react with the chemical solution in the tank to generate solid precipitate. Solid-liquid separation is achieved through a filter screen, and the separated solid precipitate is collected and discharged. Periodically spray water onto the opposite side of the filter screen to remove solid deposits adhering to the filter screen surface; The liquid, after solid-liquid separation, is introduced into a water storage tank. Through heat exchange with the cooling coils installed in the water storage tank, the liquid is forcibly cooled and maintained at 20°C to 30°C.

[0016] This invention also proposes a fire suppression system for a new energy vehicle chassis battery, used to implement the method described above, including: Transport vehicles; A fireproof isolation cover, housed on the transport vehicle, includes a top plate, a bottom support frame, a fireproof cover fabric, multiple telescopic columns, and a telescopic drive mechanism for driving the fireproof cover fabric to unfold. The top plate is provided with a smoke exhaust port and a top sprinkler port. The upper end of the fireproof cover fabric is connected to the edge of the top plate, and the lower end of the fireproof cover fabric is connected to the bottom support frame. The upper end of each telescopic column is fixedly connected to the top plate, and the lower end of each telescopic column is fixedly connected to the bottom support frame. The telescopic columns are configured to drive the fireproof cover fabric to unfold downwards. The mobile fire extinguishing unit, housed on the transport vehicle, includes an upward spraying unit and a water collection unit. The upward spraying unit is located within or above the water collection area of ​​the water collection unit. The upward spraying unit is provided with an upward spraying port, and the water collection unit is provided with a water collection port. A gas phase purification module is installed on the vehicle. The gas phase purification module has an air inlet and an exhaust end. The air inlet is connected to the smoke exhaust port of the fireproof isolation cover. The gas phase purification module includes a reaction section filled with a chemical solution. The reaction section is used to wash the flue gas and generate washing waste liquid. The bottom of the gas phase purification module is provided with a drain port, which discharges the washing waste liquid. The gas treated by the gas phase purification module is output through the exhaust end. A liquid-phase purification module is installed on the vehicle. Its water inlet is connected to the water collection unit of the mobile fire extinguishing unit and the sewage outlet of the gas-phase purification module. Its water outlet is connected to the top spray interface of the fireproof isolation cover and the upward spray interface of the mobile fire extinguishing unit. The liquid-phase purification module is used to purify waste liquid and cool the treated water for recycling. The control terminal is communicatively connected to the transport vehicle and is used to send commands to control the automatic deployment of the fireproof isolation cover, the automatic release of the mobile fire extinguishing unit, and the operation of the gas phase purification module and the liquid phase purification module.

[0017] The present invention has the following beneficial effects: 1) This invention automatically deploys fireproof isolation covers and mobile fire extinguishing units via remote commands, without requiring personnel to approach the fire scene, thus ensuring the safety of rescue personnel.

[0018] 2) The enclosed space of the fireproof isolation enclosure contains highly toxic fumes, which are then purified through multiple stages before being discharged in compliance with standards, thus preventing environmental pollution. Sediments generated during the purification process can be automatically discharged, achieving self-cleaning of the equipment.

[0019] 3) All waste liquid generated during fire extinguishing is collected, purified and forcibly cooled, and then circulated back to the top and bottom for continued spraying, forming a closed-loop gas-liquid system that continuously removes battery heat and prevents the discharge of toxic wastewater, thus significantly saving water resources.

[0020] 4) Redundant piping design, filter self-cleaning, adaptive spraying and leakage protection mechanisms further ensure the continuous and reliable operation of the system under harsh working conditions. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a fire suppression system for a new energy vehicle chassis battery according to the present invention; Figure 2 This is a schematic diagram of the structure of a fireproof isolation cover when the telescopic column is opened, according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the fireproof cover fabric in a fireproof isolation cover according to an embodiment of the present invention after it has been unfolded. Figure 4 This is a flowchart illustrating a method for handling fires in the chassis battery of a new energy vehicle according to an embodiment of the present invention.

[0022] Reference numerals: 100-Transport vehicle; 200-Fireproof isolation cover; 300-Mobile fire extinguishing unit; 400-Gas phase purification module; 500-Liquid phase purification module; 600-Mobile fire extinguishing trolley; 201-Top plate; 202-Bottom support frame; 203-Fireproof cover cloth; 204-Telescopic column; 205-Smoke exhaust interface; 206-Top sprinkler interface; 207-Air pipe; 208-Airbag; 209-Water supply pipeline. Detailed Implementation

[0023] 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.

[0024] This embodiment provides a method for handling a fire in the chassis battery of a new energy vehicle. This method can be implemented by a dedicated fire suppression system integrated into the transport vehicle. The transport vehicle can be a manned fire truck or a drive-by-wire chassis vehicle with unmanned driving capabilities. The following is combined with... Figure 4 Each step of the method is explained in detail.

[0025] S1, by sending instructions through a control terminal connected to the transport vehicle, the fireproof isolation cover stored on the transport vehicle is automatically deployed to cover the burning vehicle and form a closed space, and the mobile fire extinguishing unit stored on the transport vehicle is automatically released to the bottom area of ​​the burning vehicle.

[0026] Furthermore, the automatic deployment of the fireproof isolation cover specifically includes: In response to instructions from the control terminal, the folded fireproof isolation cover was hoisted to the top of the burning vehicle; Triggering the telescopic drive mechanism integrated on the fireproof isolation cover, the telescopic drive mechanism drives the telescopic column of the fireproof isolation cover to extend downward, thereby causing the fireproof cover cloth of the fireproof isolation cover to unfold until the bottom support frame of the fireproof isolation cover touches the ground.

[0027] Furthermore, the automatic release of the mobile fire extinguishing unit specifically includes: In response to instructions from the control terminal, the storage compartment installed on the transport vehicle is opened, and the ramp installed in the storage compartment is released. Control the mobile fire extinguishing unit to autonomously travel along the ramp to the bottom of the burning vehicle.

[0028] Furthermore, the control terminal can be an on-board control panel installed in the driver's cab of the transport vehicle, through which the operator sends commands; or it can be a remote operation platform separate from the transport vehicle, in which the transport vehicle is an unmanned vehicle, and the operator sends commands through a wireless communication network on the remote operation platform.

[0029] S2, spray fire extinguishing medium onto the burning vehicle inside the fireproof isolation cover, extract the smoke from the enclosed space, wash and purify the smoke before discharging it, and collect the washing waste liquid generated during the washing and purification process.

[0030] Furthermore, washing and purification specifically include: Spray cooling liquid onto the drawn-out flue gas to cool it down and wash away impurities; The flue gas after spray washing is separated from the solid-liquid mixture formed during the washing process, and the solid precipitate and primary washing waste liquid are intercepted and collected. The separated flue gas is passed into the chemical absorbent liquid for a bubbling reaction, and the gas distribution method is used to make the gas flow density in the middle region greater than that in the two sides, driving the absorbent liquid to form a liquid circulation from the middle to both sides. The solid precipitate generated by the bubbling reaction is transported to the static area for settling through the liquid circulation, and the waste liquid containing the precipitate is automatically discharged when the static pressure generated by the precipitate reaches a preset threshold. The flue gas after chemical absorption is cooled to condense the water vapor into liquid water, which is then collected. The dehumidified flue gas is adsorbed and filtered to remove residual toxins, and then the clean gas is discharged. The primary washing waste liquid and the waste liquid containing precipitates together constitute the washing waste liquid generated in the washing and purification process described in S2.

[0031] S3, control the mobile fire extinguishing unit to spray fire extinguishing medium onto the burning vehicle chassis battery, and collect the fire extinguishing waste liquid that falls back after spraying.

[0032] Furthermore, the upward spraying of the mobile fire extinguishing unit specifically includes: Distance data between the burning vehicle chassis and the surface of the mobile fire extinguishing unit is collected by sensors placed around the mobile fire extinguishing unit. The upward spray angle of the mobile fire extinguishing unit is adaptively adjusted based on the distance data to maintain the water jet in contact with the bottom of the chassis battery.

[0033] Furthermore, S3 also includes: Real-time detection of ground leakage current in the water accumulation area at the bottom of the mobile fire extinguishing unit; When the leakage current is detected to exceed a preset threshold, the spray mode of the mobile fire extinguishing unit is forcibly switched to a fan-shaped atomization mode.

[0034] S4, the collected washing waste liquid and fire extinguishing waste liquid are purified, and the purified liquid is cooled.

[0035] Furthermore, S4 specifically includes: The mixed waste liquid containing the washing waste liquid and the fire extinguishing waste liquid is introduced into the first pipeline; Real-time monitoring of the pressure or temperature within the first pipeline; When abnormal pressure or excessively high temperature is detected, the flow path of the mixed waste liquid is automatically switched from the first pipeline to the second pipeline that is connected in parallel with the first pipeline. It also performs heat exchange on the flowing mixed waste liquid to achieve primary cooling; The waste liquid, after primary cooling, is pumped to a reaction sedimentation tank to react with the chemical solution in the tank to generate solid precipitate. Solid-liquid separation is achieved through a filter screen, and the separated solid precipitate is collected and discharged. Periodically spray water onto the opposite side of the filter screen to remove solid deposits adhering to the filter screen surface; The liquid, after solid-liquid separation, is introduced into a water storage tank. Through heat exchange with the cooling coils installed in the water storage tank, the liquid is forcibly cooled and maintained at 20°C to 30°C.

[0036] Furthermore, the pH value and pollutant concentration of the washing wastewater in S2 are monitored in real time, and the ratio of the chemical solution in the reaction sedimentation tank is dynamically adjusted based on the monitoring data, thereby achieving optimal treatment of the mixed wastewater. The pollutant concentration includes fluoride ion concentration.

[0037] In one specific embodiment, the pollutant concentration also includes total heavy metal concentration, turbidity, or particulate matter concentration. The chemical solution in the reaction sedimentation tank includes one or more of the following: defluorinating agent, flocculant or coagulant aid, sulfide precipitant or heavy metal trapping agent. Dynamically adjusting the ratio of the chemical solution in the reaction sedimentation tank specifically includes: adjusting the dosage of defluorinating agent based on pH value and negative ion concentration; adjusting the dosage of sulfide precipitant or heavy metal trapping agent based on total heavy metal concentration; and adjusting the dosage of flocculant based on turbidity.

[0038] S5, pressurize the cooled liquid and send it back to the fireproof isolation cover to spray it onto the burning vehicle, and at the same time send it back to the mobile fire extinguishing unit to continue spraying it onto the chassis battery of the burning vehicle.

[0039] Furthermore, the fire response method also includes the following steps: Real-time monitoring of the temperature of the burning vehicle chassis; When the chassis temperature drops to a preset threshold, the intensity of the spray directed at the burning vehicle from inside the fireproof isolation cover is automatically reduced, and the clean gas emission rate in S2 is simultaneously lowered.

[0040] This allows for the control of heat absorption by the low-temperature reclaimed water and heat exchange with the gas within the enclosed space, maintaining a stable rate of temperature decrease in the chassis and preventing temperature fluctuations caused by excessive cooling.

[0041] This invention also provides a fire suppression system for a new energy vehicle chassis battery, specifically designed to implement the methods described above. For example... Figure 1 As shown, the system includes: a transport vehicle 100, a fireproof isolation cover 200, a mobile fire extinguishing unit 300, a gas phase purification module 400, a liquid phase purification module 500, and a control terminal.

[0042] The fireproof isolation cover 200 is housed on the transport vehicle 100. The fireproof isolation cover 200 includes a top plate 201, a bottom support frame 202, a fireproof cover 203, multiple telescopic columns 204, and a telescopic drive mechanism for unfolding the fireproof cover 203. The top plate 201 is provided with a smoke exhaust port 205 and a top sprinkler port 206. The upper end of the fireproof cover 203 is connected to the edge of the top plate 201, and the lower end of the fireproof cover 203 is connected to the bottom support frame 202. The upper end of each telescopic column 204 is fixedly connected to the top plate 201, and the lower end of each telescopic column 204 is fixedly connected to the bottom support frame 202. The telescopic columns 204 are configured to drive the fireproof cover 203 to unfold downwards.

[0043] The mobile fire extinguishing unit 300 is housed on the transport vehicle 100 and includes an upward spraying unit and a water collection unit. The upward spraying unit is located in or above the water collection area of ​​the water collection unit. The upward spraying unit is provided with an upward spraying interface, and the water collection unit is provided with a water collection port.

[0044] A gas phase purification module 400 is mounted on the transport vehicle 100. The module has an air inlet and an exhaust outlet. The air inlet is connected to the smoke exhaust port 205 of the fireproof isolation cover 200. The gas phase purification module 400 includes a reaction section filled with a chemical solution, used to wash the flue gas and generate washing waste liquid. A drain outlet is located at the bottom of the module 400, through which the washing waste liquid is discharged. The gas treated by the gas phase purification module 400 is output through the exhaust outlet. In this embodiment, the exhaust outlet is a smoke exhaust fan.

[0045] The liquid-phase purification module is installed on the transport vehicle 100. Its water inlet is connected to the water collection unit of the mobile fire extinguishing unit 300 and the sewage outlet of the gas-phase purification module 400, respectively. Its water outlet is connected to the top spray port 206 of the fireproof isolation cover 200 and the upward spray port of the mobile fire extinguishing unit 300, respectively. The liquid-phase purification module 500 is used to purify and treat waste liquid and then cool and recycle the treated water.

[0046] The control terminal is connected to the transport vehicle 100 and is used to send commands to control the automatic deployment of the fireproof isolation cover 200, the automatic release of the mobile fire extinguishing unit 300, and the operation of the gas phase purification module 400 and the liquid phase purification module 500.

[0047] In one specific embodiment, the transport vehicle 100 serves as the mobile platform for the entire system, and its chassis integrates several specialized mechanical operating structures. These include a folding hydraulic lifting mechanism for hoisting the fireproof isolation cover 200, a roof-mounted storage compartment for storing the fireproof isolation cover 200 while in motion, a storage compartment for storing the mobile fire extinguishing unit 300, modular mounting brackets for securing the gas phase purification module 400 and the liquid phase purification module 500, and main rigid pipelines integrated within the vehicle, along with quick-connect fittings at the ends of these pipelines. The storage compartment's door is equipped with a releasable electric ramp or hydraulic lifting platform.

[0048] The structure of the fireproof isolation cover 200 is as follows: Figure 2 and Figure 3As shown. In the non-operational state, the fireproof isolation cover 200 is folded and stored in the roof storage compartment. The fireproof isolation cover 200 includes a top plate 201, a bottom support frame 202, a fireproof cover fabric 203, and multiple telescopic columns 204. The top plate 201 integrates a smoke exhaust interface 205 and a top sprinkler interface 206. The fireproof cover fabric 203 has a multi-layer composite structure, consisting of an aluminized fiberglass cloth layer, a basalt fiber cloth layer, and a polytetrafluoroethylene coating from the outside to the inside. Multiple telescopic columns 204 are distributed around the top plate 201. Each telescopic column 204 is a multi-stage sleeve-type pneumatic telescopic column, with its upper end fixedly connected to the top plate 201 and its lower end fixedly connected to the bottom support frame 202. A pneumatic telescopic drive mechanism consisting of an airbag 208, an air pipe 207, and a valve is also provided above the top plate 201. An X-shaped scissor-type linkage mechanism is connected between adjacent telescopic columns 204 to enhance the structural rigidity after deployment.

[0049] The mobile fire extinguishing unit 300 is a mobile fire extinguishing vehicle 600 with autonomous mobility. Its structure includes a walking mechanism made of flame-retardant, high-temperature resistant, and insulating rubber; a water collection tray positioned above the walking mechanism; an upward spraying unit fixed within the water collection area of ​​the tray; and an adaptive adjustment module consisting of an ultrasonic / infrared sensor assembly and a built-in actuator. A grounded metal wire mesh is laid at the bottom of the water collection tray and connected to a grounding component. The upward spraying unit includes a fan-shaped atomizing nozzle array arranged along the periphery and a central DC impact nozzle array.

[0050] The gas phase purification module 400 is mounted on the transport vehicle and, along the gas flow direction, sequentially includes a primary spray section, a secondary chemical reaction section, and a terminal adsorption section. The reaction chamber in the secondary chemical reaction section is immersed in a U-shaped pipe array. The pipe density in the middle region of this U-shaped pipe array is greater than that in the two side regions, and a one-way valve structure is installed at the bottom. The terminal adsorption section includes condensate pipes, a condensate collection tray, and an activated carbon adsorption filter.

[0051] The liquid-phase purification module 500 is mounted on a transport vehicle and, along the fluid flow direction, sequentially includes an influent pretreatment unit, a chemical reaction purification unit, and a greywater deep cooling and storage unit. The influent pretreatment unit includes a first influent pipe and a second influent pipe connected in parallel, a bypass valve assembly, a monitoring and control module, and a heat exchanger. The chemical reaction purification unit includes a reaction sedimentation tank with a precision filter and backwashing pipeline, and a sludge collection tank at the bottom. The greywater deep cooling and storage unit includes a water tank with integrated cooling coils and a high-pressure output pump. Figure 2 As shown, the output end of the high-pressure output pump is connected to the top spray port 206 of the fireproof isolation cover 200 via a water supply pipe 209. If the fire suppression equipment is mounted on a vehicle, the cooling coil can also be connected to the vehicle's air conditioning system.

[0052] The control terminal communicates with the vehicle's onboard controller. It can be an onboard control panel located in the driver's cab or a remote operating platform connected via a wireless network. The control terminal sends action commands to the aforementioned functional modules to control the automated operation of the entire process, including deployment, purification, fire extinguishing, and circulation.

[0053] Furthermore, the mobile fire extinguishing unit is also equipped with a temperature detection unit to monitor the temperature of the burning vehicle chassis in real time. The fire response system also includes a linkage control unit, which is communicatively connected to the mobile fire extinguishing unit, the top sprinkler interface of the fireproof isolation cover, and the exhaust fan of the gas phase purification module. The linkage control unit is configured to automatically perform the following operations when the temperature detection unit detects that the chassis temperature has dropped to a preset threshold: Reduce the spray intensity of the top spray interface to decrease the flow rate and heat absorption of the low-temperature regenerated water in the enclosed space; At the same time, the speed of the exhaust fan is reduced to decrease the gas exchange rate in the enclosed space. This ensures that the thermal environment within the enclosed space maintains a continuous cooling effect on the battery pack, preventing the chassis temperature from rising prematurely or cooling unevenly due to excessive heat absorption by the low-temperature water.

[0054] The linkage control unit adjusts the top spray intensity and the exhaust fan speed based on the same chassis temperature feedback signal, forming a coupled control based on the thermal balance within the enclosed space.

[0055] Preferably, when the temperature threshold is set to 60°C, the spray flow rate is reduced by 30% and the fan speed is reduced by 20%.

[0056] Between the gas-phase purification module and the liquid-phase purification module, this system also features a specially designed parameter linkage control scheme to further improve the treatment efficiency of mixed waste liquid and reduce treatment costs. Specifically: During the flue gas scrubbing process, the chemical absorption system in the secondary chemical reaction zone of the gas-phase purification module generates scrubbing waste liquid containing residual alkalinity, fluoride ions, and other pollutants. This scrubbing waste liquid mixes with the fire extinguishing waste liquid from the mobile fire extinguishing unit and then enters the liquid-phase purification module.

[0057] Considering the extremely high time sensitivity required for handling lithium battery fires, and the time-consuming and inefficient methods of separately collecting, transporting, and treating fire extinguishing wastewater and washing wastewater, the online mixed treatment solution proposed in this application has an irreplaceable advantage in terms of timeliness. To address the problem of independent dosing and difficulty in synergistic treatment of the two wastewaters in traditional methods, the applicant designed the gas-phase purification module and the liquid-phase purification module as a parameter-linked system: online sensors monitor the pH value and contaminant concentration (especially fluoride ion concentration) of the washing wastewater in real time, and feed the monitoring data back to the dosing control unit of the liquid-phase purification module. The control unit dynamically adjusts the dosage ratio of defluorinating agent, flocculant or coagulant aid, sulfide precipitant or heavy metal scavenger accordingly, thereby achieving optimal treatment of the mixed wastewater.

[0058] In a specific embodiment, the method of using the new energy vehicle chassis battery fire response system is as follows: S1: Operators do not need to approach the burning vehicle. Instead, they can send instructions through a control terminal that is connected to the transport vehicle to remotely control the automatic deployment of each functional module from the storage state to the working position.

[0059] The control terminal can be a vehicle-mounted control panel located in the driver's cab of the transport vehicle. After firefighters arrive at the fire scene and park the vehicle in a safe area, they can operate the control panel directly from the driver's cab without having to get out of the vehicle and approach the burning vehicle. When the transport vehicle is an unmanned vehicle, the control terminal can be a remote operating platform located in a remote command center. Operators send commands to the vehicle via a wireless communication network to control the vehicle to automatically drive to the vicinity of the burning vehicle before executing deployment actions.

[0060] Upon receiving the deployment command, the folding hoisting mechanism installed on the transport vehicle smoothly lifts the folded fireproof cover from its top storage position to above the burning vehicle and suspends it. The operator then remotely triggers the telescopic drive mechanism integrated on the fireproof cover via a control terminal. In this embodiment, the telescopic drive mechanism is preferably a pneumatic telescopic drive mechanism. The valve in this pneumatic telescopic drive mechanism switches to the inflation state, and compressed air stored in the airbag 208 is injected into the inner cavity of multiple multi-stage sleeve-type pneumatic telescopic columns via the air pipe 207. Driven by the compressed air, each telescopic column extends downwards synchronously, causing the fireproof cover and bottom support frame to descend smoothly until the bottom support frame contacts the ground. At this point, the fireproof cover is fully unfolded, forming a completely enclosed space with the top plate and bottom support frame, effectively isolating external oxygen and sealing off toxic fumes.

[0061] Meanwhile, the storage compartment on the chassis of the transport vehicle releases a ramp at its bottom via electric or hydraulic means, causing one end to touch the ground and form a guide channel. Upon receiving a remote control command, the mobile fire extinguishing unit stored inside the compartment autonomously drives out of the compartment along the ramp and then uses its own walking mechanism to crawl under the burning vehicle. In this embodiment, the mobile fire extinguishing unit is specifically a mobile fire extinguishing vehicle with autonomous walking capabilities.

[0062] After the above deployment is completed, the rigid main pipes pre-installed on the transport vehicle are quickly connected to the smoke exhaust interface on the fireproof isolation cover, the top sprinkler interface, and the upward spray interface and water collection port on the mobile fire extinguishing cart via quick-connect couplings at their ends, establishing a complete gas and liquid circuit connection. All of the above deployment actions are completed remotely by operators from a safe distance via a control terminal, without requiring personnel to enter the danger zone around the burning vehicle.

[0063] S2, after the enclosed space is formed and the gas path is established, the extinguishing agent is sprayed onto the burning vehicle inside the fireproof isolation enclosure, and the smoke treatment process is initiated. A slight negative pressure state is created within the enclosed space through a negative pressure generating device connected to the enclosed space. The high-temperature, highly toxic fumes (containing hydrogen fluoride, hydrogen cyanide, volatile organic compounds, etc.) generated by the battery combustion are forcibly extracted from the enclosed space and enter the washing and purification process. In this embodiment, water can be selected as the extinguishing agent.

[0064] The washing and purification process sequentially goes through a primary spray washing stage, a secondary chemical absorption stage, and an end-of-pipe purification treatment stage.

[0065] In the primary spray scrubbing stage, high-temperature flue gas enters the primary treatment area. This area sprays atomized cooling liquid onto the flue gas, causing a rapid decrease in temperature. Large particulate impurities and some soluble toxic gases carried in the flue gas are washed into the liquid phase, forming primary scrubbing waste liquid. Solid precipitates generated during the scrubbing process are intercepted and, along with the primary scrubbing waste liquid, are guided and collected in the collection area, forming scrubbing waste liquid awaiting further treatment.

[0066] After initial cooling and washing, the flue gas enters the secondary chemical absorption stage. In this stage, the flue gas is guided through a U-shaped array of pipes immersed in a chemical absorbent liquid, where it undergoes a vigorous contact reaction with the absorbent liquid in a bubbling manner. The chemical absorbent liquid is preferably alkaline or oxidizing; acidic toxic gases in the flue gas (such as hydrogen fluoride) react with the absorbent liquid to form solid chemical precipitates.

[0067] To improve reaction efficiency and achieve automatic slag removal, this U-shaped pipe array employs a special density distribution design: the pipe density in the central region is greater than that in the two side regions. Utilizing the high gas outflow in the denser zone during bubbling, the chemical absorbent liquid is driven to form a vertical liquid circulation from the center outwards within the reaction chamber. This liquid circulation continuously transports the solid precipitate generated by the reaction to the static settling zones on both sides. When the static pressure generated by the accumulated solid precipitate in the static zone reaches a preset threshold, a one-way valve structure located at the bottom of this zone automatically opens, discharging the waste liquid containing the high concentration of solid precipitate. This discharged waste liquid, along with the aforementioned primary washing waste liquid, is then incorporated into the subsequent waste liquid regeneration treatment.

[0068] The flue gas, having undergone chemical absorption, carries a large amount of saturated water vapor into the final purification stage. In this stage, the flue gas flows through the surface of a condenser pipe carrying a low-temperature cooling medium, where it is forcibly cooled, causing the water vapor in the flue gas to condense into liquid water. The condensate is collected in a collection tray below and guided through pipelines into the subsequent wastewater regeneration treatment process, achieving water resource recycling. The dehumidified and dried flue gas continues to flow through an adsorption filter to remove any remaining trace amounts of toxins and odors. This adsorption filter is preferably an activated carbon filter that has undergone special treatment to enhance its adsorption capacity for hydrogen fluoride and volatile organic compounds. Finally, the clean gas, meeting safe emission standards, is released into the atmosphere.

[0069] S3: Simultaneously or sequentially with the start of flue gas treatment, the bottom fire suppression process is initiated. The operator remotely controls the mobile fire suppression unit located at the bottom of the burning vehicle via a control terminal. The DC impact nozzle array of its upward spray unit begins operation, forming a concentrated water jet of high-pressure extinguishing medium that directly impacts and cools the battery pack casing of the vehicle chassis. Initially, onboard stored water can be used as the extinguishing medium; later, recycled water generated in step S4 is used.

[0070] To ensure optimal cooling, the mobile fire suppression unit adaptively adjusts itself during spraying. Specifically, ultrasonic or infrared sensor components positioned around the outer edge of the device continuously collect data on the vertical distance between the burning vehicle chassis and the upper surface of the device's water collection pan. Based on preset discrete gear control logic, the actuator automatically adjusts the spray angle of the upward spray unit, ensuring that the concentrated water jet always lands in close contact with the bottom of the battery pack, maximizing heat exchange efficiency.

[0071] The fire extinguishing waste liquid that falls back due to gravity after being sprayed, along with some cooling water that may flow down from the top of the fireproof isolation cover, is collected in a water collection pan of the mobile fire extinguishing unit. The water collection port on the water collection pan discharges this fire extinguishing waste liquid in real time and sends it to the subsequent waste liquid regeneration treatment process through the return water pipeline.

[0072] During bottom-level fire suppression, this method also includes an electrical safety protection sub-step. The mobile fire suppression unit's built-in leakage current protection module monitors the induced current in its bottom grounding assembly in real time. When the induced current exceeds a preset safety threshold due to battery pack leakage, the leakage current protection module forcibly cuts off the water supply to the DC impact nozzle and switches the spray mode to a fan-shaped atomization mode. By utilizing the air gaps between the atomized water droplets to significantly increase resistance, the return path of current conducted through the water flow is effectively cut off, protecting the equipment and the safety of operators.

[0073] S4, the washing waste liquid generated in step S2 and the fire extinguishing waste liquid collected in step S3 are combined into the waste liquid regeneration treatment process through their respective collection pipelines. This process includes three stages in sequence: influent pretreatment, chemical reaction precipitation purification, and deep cooling.

[0074] In the influent pretreatment stage, the collected mixed waste liquid is transported to the pretreatment unit. To improve the robustness of the entire water treatment system, the pretreatment unit employs a redundant piping design. The mixed waste liquid includes washing waste liquid and fire extinguishing waste liquid. The mixed waste liquid is introduced into the current working branch of the parallel first and second influent pipes. Sensors installed in the pipes monitor the fluid pressure and temperature of the working branch in real time. When the monitoring and control module detects abnormal pressure (such as pressure rise caused by filter blockage) or excessive temperature in the current branch, it automatically issues a command to control the bypass valve assembly to switch the waste liquid flow path to another backup parallel branch within milliseconds, ensuring that the waste liquid treatment process is not interrupted. The waste liquid flowing through the working branch simultaneously passes through a heat exchanger, using ambient air or an auxiliary cold source for primary cooling, reducing the heat load of subsequent treatment.

[0075] The pretreated and initially cooled wastewater is pumped to a reaction sedimentation tank for chemical reaction sedimentation purification. In this stage, specific chemical agents are added to the wastewater, such as precipitants for heavy metal ions and acid-base adjusters for neutralization. These agents cause dissolved toxic substances (such as heavy metal ions and fluoride ions) in the wastewater to react chemically, generating water-insoluble solid precipitates. The wastewater then passes through a precision filter screen installed inside the reaction sedimentation tank. The purified water permeates through the screen to the next stage, while the solid precipitates are trapped on the filter screen surface or settle at the bottom of the tank. The sludge settled at the bottom of the tank is periodically discharged through a collection tank. To maintain the long-term effective operation of the precision filter screen, this method also includes a periodic self-cleaning step: high-pressure water is sprayed onto the reverse side of the precision filter screen through a backwashing pipeline. The peeling force of the water flow washes away the sticky solid precipitates adhering to the filter screen surface, allowing them to settle into the collection tank at the bottom of the tank, restoring the filter screen's throughput.

[0076] The purified water (reclaimed water) obtained after chemical reaction precipitation is introduced into a storage tank for deep cooling. Inside the storage tank, cooling coils connected to an independent refrigeration unit are installed. The low-temperature refrigerant flowing within the cooling coils undergoes forced convection heat exchange with the water in the storage tank, rapidly lowering the water temperature and precisely maintaining it within a preset optimal temperature range of 20°C to 30°C. Experiments have verified that when the water temperature exceeds 30°C, the cooling efficiency for battery packs experiencing thermal runaway significantly decreases, failing to quickly remove heat; when the water temperature is below 20°C, the excessive temperature difference may cause severe thermal shock to the battery casing under high-temperature conditions, increasing the risk of casing cracking. Forced deep cooling to 20°C to 30°C is a key process parameter balancing cooling efficiency and equipment safety.

[0077] S5, pressurize and deliver water cooled to 20°C to 30°C back to the top spray nozzle of the fireproof isolation cover and the spray nozzle of the mobile fire extinguishing unit.

[0078] Step S5 involves drawing and pressurizing the low-temperature regenerated water, stored in the water tank in step S4 and stabilized at a temperature of 20°C to 30°C, using a high-pressure output pump. A portion of the pressurized low-temperature water is delivered through a water supply pipeline to the top spray nozzle at the top of the fireproof isolation cover, forming a fine cooling water curtain from top to bottom within the enclosed space to cool the entire vehicle body and suppress the spread of fire. The remaining low-temperature water is delivered through a flexible pipeline to the upward spray port at the bottom, maintaining the bottom-targeted impact cooling described in step S3.

[0079] The combined effect of the top spray and bottom spray to form a continuous cooling water curtain in both directions rapidly removes heat from the battery pack until the internal electrochemical reaction of the battery stops and thermal runaway is completely prevented.

[0080] Throughout the fire response process, steps S2 to S5 operate in a continuous cycle. Wastewater is continuously collected, regenerated, and cooled, and then reused for firefighting, forming a clean and efficient firefighting process with a closed-loop gas-liquid system and near-zero emissions.

[0081] The present invention has the following beneficial effects: 1) This invention automatically deploys fireproof isolation covers and mobile fire extinguishing units via remote commands, without requiring personnel to approach the fire scene, thus ensuring the safety of rescue personnel.

[0082] 2) The enclosed space of the fireproof isolation enclosure contains highly toxic fumes, which are then purified through multiple stages before being discharged in compliance with standards, thus preventing environmental pollution. Sediments generated during the purification process can be automatically discharged, achieving self-cleaning of the equipment.

[0083] 3) All waste liquid generated during fire extinguishing is collected, purified and forcibly cooled, and then circulated back to the top and bottom for continued spraying, forming a closed-loop gas-liquid system that continuously removes battery heat and prevents the discharge of toxic wastewater, thus significantly saving water resources.

[0084] 4) Redundant piping design, filter self-cleaning, adaptive spraying, and leakage protection mechanisms further ensure continuous and reliable operation of the system under harsh conditions. The above-described embodiments are merely further illustrations of the present invention and are not intended to limit the 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 these corresponding modifications and changes should all fall within the protection scope of the present invention.

Claims

1. A method for handling fires in the chassis battery of a new energy vehicle, characterized in that, Includes the following steps: S1, by sending instructions through the control terminal connected to the transport vehicle, the fireproof isolation cover stored on the transport vehicle is automatically deployed and covers the burning vehicle to form a closed space, and the mobile fire extinguishing unit stored on the transport vehicle is automatically released to the bottom area of ​​the burning vehicle. S2, spray fire extinguishing medium onto the burning vehicle inside the fireproof isolation cover, draw in the smoke in the enclosed space, wash and purify the smoke before discharging it, and collect the washing waste liquid generated during the washing and purification process. S3, control the mobile fire extinguishing unit to spray fire extinguishing medium onto the burning vehicle chassis battery, and collect the fire extinguishing waste liquid that falls back after spraying; S4, the collected washing waste liquid and fire extinguishing waste liquid are purified, and the purified liquid is cooled. S5, pressurize the cooled liquid and send it back to the fireproof isolation cover to spray it onto the burning vehicle, and at the same time send it back to the mobile fire extinguishing unit to continue spraying it onto the chassis battery of the burning vehicle.

2. The method according to claim 1, characterized in that, In step S1, the automatic deployment of the fireproof isolation cover specifically includes: In response to instructions from the control terminal, the folded fireproof isolation cover was hoisted to the top of the burning vehicle; Triggering the telescopic drive mechanism integrated on the fireproof isolation cover, the telescopic drive mechanism drives the telescopic column of the fireproof isolation cover to extend downward, thereby causing the fireproof cover cloth of the fireproof isolation cover to unfold until the bottom support frame of the fireproof isolation cover touches the ground.

3. The method according to claim 1, characterized in that, In step S1, the automatic release of the mobile fire extinguishing unit specifically includes: In response to instructions from the control terminal, the storage compartment installed on the transport vehicle is opened, and the ramp installed in the storage compartment is released. Control the mobile fire extinguishing unit to autonomously travel along the ramp to the bottom of the burning vehicle.

4. The method according to claim 1, characterized in that, The control terminal in S1 is an on-board control panel located in the driver's cab of the transport vehicle, through which the operator sends commands.

5. The method according to claim 1, characterized in that, In S1, the control terminal is a remote operation platform separate from the transport vehicle. The transport vehicle is an unmanned vehicle, and the operator sends instructions through a wireless communication network on the remote operation platform.

6. The method according to claim 1, characterized in that, In step S2, the washing and purification specifically includes: Spray cooling liquid onto the drawn-out flue gas to cool it down and wash away impurities; The flue gas after spray washing is separated from the solid-liquid mixture formed during the washing process, and the solid precipitate and primary washing waste liquid are intercepted and collected. The separated flue gas is passed into the chemical absorbent liquid for a bubbling reaction, and the gas distribution method is used to make the gas flow density in the middle region greater than that in the two sides, driving the absorbent liquid to form a liquid circulation from the middle to both sides. The solid precipitate generated by the bubbling reaction is transported to the static area for settling through the liquid circulation, and the waste liquid containing the precipitate is automatically discharged when the static pressure generated by the precipitate reaches a preset threshold. The flue gas after chemical absorption is cooled to condense the water vapor into liquid water, which is then collected. The dehumidified flue gas is adsorbed and filtered to remove residual toxins, and then the clean gas is discharged. The primary washing waste liquid and the waste liquid containing precipitates together constitute the washing waste liquid generated in the washing and purification process described in S2.

7. The method according to claim 1, characterized in that, The upward spraying of the mobile fire extinguishing unit in S3 specifically includes: Distance data between the burning vehicle chassis and the surface of the mobile fire extinguishing unit is collected by sensors placed around the mobile fire extinguishing unit. The upward spray angle of the mobile fire extinguishing unit is adaptively adjusted based on the distance data to maintain the water jet in contact with the bottom of the chassis battery.

8. The method according to claim 1, characterized in that, S3 further includes: Real-time detection of ground leakage current in the water accumulation area at the bottom of the mobile fire extinguishing unit; When the leakage current is detected to exceed a preset threshold, the spray mode of the mobile fire extinguishing unit is forcibly switched to a fan-shaped atomization mode.

9. The method according to claim 1, characterized in that, S4 specifically includes: The mixed waste liquid containing the washing waste liquid and the fire extinguishing waste liquid is introduced into the first pipeline; Real-time monitoring of the pressure or temperature within the first pipeline; When abnormal pressure or excessively high temperature is detected, the flow path of the mixed waste liquid is automatically switched from the first pipeline to the second pipeline that is connected in parallel with the first pipeline. It also performs heat exchange on the flowing mixed waste liquid to achieve primary cooling; The waste liquid, after primary cooling, is pumped to a reaction sedimentation tank to react with the chemical solution in the tank to generate solid precipitate. Solid-liquid separation is achieved through a filter screen, and the separated solid precipitate is collected and discharged. Periodically spray water onto the opposite side of the filter screen to remove solid deposits adhering to the filter screen surface; The liquid, after solid-liquid separation, is introduced into a water storage tank. Through heat exchange with the cooling coils installed in the water storage tank, the liquid is forcibly cooled and maintained at 20°C to 30°C.

10. A fire suppression system for a new energy vehicle chassis battery, used to implement the method as described in claim 1, characterized in that, include: Transport vehicles; A fireproof isolation cover, housed on the transport vehicle, includes a top plate, a bottom support frame, a fireproof cover fabric, multiple telescopic columns, and a telescopic drive mechanism for driving the fireproof cover fabric to unfold. The top plate is provided with a smoke exhaust port and a top sprinkler port. The upper end of the fireproof cover fabric is connected to the edge of the top plate, and the lower end of the fireproof cover fabric is connected to the bottom support frame. The upper end of each telescopic column is fixedly connected to the top plate, and the lower end of each telescopic column is fixedly connected to the bottom support frame. The telescopic columns are configured to drive the fireproof cover fabric to unfold downwards. The mobile fire extinguishing unit, housed on the transport vehicle, includes an upward spraying unit and a water collection unit. The upward spraying unit is located within or above the water collection area of ​​the water collection unit. The upward spraying unit is provided with an upward spraying port, and the water collection unit is provided with a water collection port. A gas phase purification module is installed on the vehicle. The gas phase purification module has an air inlet and an exhaust end. The air inlet is connected to the smoke exhaust port of the fireproof isolation cover. The gas phase purification module includes a reaction section filled with a chemical solution. The reaction section is used to wash the flue gas and generate washing waste liquid. The bottom of the gas phase purification module is provided with a drain port, which discharges the washing waste liquid. The gas treated by the gas phase purification module is output through the exhaust end. A liquid-phase purification module is installed on the vehicle. Its water inlet is connected to the water collection unit of the mobile fire extinguishing unit and the sewage outlet of the gas-phase purification module. Its water outlet is connected to the top spray interface of the fireproof isolation cover and the upward spray interface of the mobile fire extinguishing unit. The liquid-phase purification module is used to purify waste liquid and cool the treated water for recycling. The control terminal is communicatively connected to the transport vehicle and is used to send commands to control the automatic deployment of the fireproof isolation cover, the automatic release of the mobile fire extinguishing unit, and the operation of the gas phase purification module and the liquid phase purification module.

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