CN113696738A - Fire suppression and fire extinguishing device and method for power battery box of fuel cell vehicle - Google Patents
Fire suppression and fire extinguishing device and method for power battery box of fuel cell vehicle Download PDFInfo
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- CN113696738A CN113696738A CN202111045557.3A CN202111045557A CN113696738A CN 113696738 A CN113696738 A CN 113696738A CN 202111045557 A CN202111045557 A CN 202111045557A CN 113696738 A CN113696738 A CN 113696738A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0053—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to fuel cells
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/04—Cutting off the power supply under fault conditions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
- B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
- B60L58/33—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by cooling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention relates to the field of large-scale fuel vehicles, in particular to a fire suppression and fire extinguishing device and method for a power battery box of a fuel battery vehicle, wherein the fire suppression and fire extinguishing device comprises a whole vehicle hydrogen gas cylinder, a primary pressure reducing valve is connected to the outside of the whole vehicle hydrogen gas cylinder, a secondary pressure reducing valve is connected to the tail end of the primary pressure reducing valve, a main electromagnetic valve is connected to the tail end of the secondary pressure reducing valve, a main controller is arranged at one end of the main electromagnetic valve, an electric box is communicated with the tail ends of an electromagnetic valve 1 and an electromagnetic valve N, the device adopts a fuel and inhibitor sharing technology, so that integration and light weight are achieved, the air in the electric box is quickly discharged by utilizing a quick replacement electric box gas technology, the purity of the gas in the electric box is improved, the risk is reduced by adopting a novel ignition suppression technology, the low-temperature liquid nitrogen fire extinguishing technology is adopted to solve the problem of thermal runaway of a lithium battery, and linkage fire extinguishing, High voltage interruption and fuel cell shutdown technology are adopted, and the safety of the whole vehicle and the electric box is further guaranteed.
Description
Technical Field
The invention relates to the field of large fuel vehicles, in particular to a fire suppression and fire extinguishing device and method for a power battery box of a fuel cell vehicle.
Background
The existing fuel cell vehicle battery box adopts the cylindrical dry powder extinguishing agent to be externally arranged outside the battery box body, the dry powder extinguishing agent in the cylinder is sprayed to extinguish fire when fire occurs, because the cylindrical fire extinguishing bomb cannot be arranged inside the battery box body, only low-voltage equipment and wiring harness fire outside the battery box body can be solved, or the hexafluoropropane or heptafluoropropane extinguishing agent is adopted, when fire occurs in the battery box body, the cylindrical fire extinguishing bomb is sprayed inside the battery box body to extinguish the fire, the external cylindrical fire extinguishing bomb and the internal spraying type centralized fire extinguishing device have the precondition that the passive fire extinguishing action is carried out after the fire occurs in the power battery box body, the fire hidden danger in the power battery box cannot be prevented and inhibited in advance, and belong to passive safety, once the fire occurs outside and in the battery box body, the damage to electronic components and traditional parts is irreversible, and the electronic components are required to be replaced and detected again, at present, the sealing grade of a power battery box body is IP68 or above, exchange is carried out through a waterproof, breathable, moisture-blocking and explosion-proof valve on the box body daily, oxygen-containing air in the battery box body is difficult to replace quickly by adopting conventional nitrogen inert gas, the deformation of the shell of the electric box can be caused by the fact that the deformation of the electric box is weak due to the adoption of a lightweight shell, the pressure of the inert gas entering the box can not be too large, otherwise the electric box can be bulged and deformed, the inert gas can be completely replaced out of the air in the box body, and a long time is required for reaching a high-purity nitrogen state, a method and apparatus for extinguishing fires using liquid nitrogen.
Disclosure of Invention
The invention aims to provide a fire suppression and fire extinguishing device and method for a power battery box of a fuel cell vehicle, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a be used for fuel cell car power battery case conflagration to restrain and extinguishing device, includes whole car hydrogen gas cylinder, the external connection of whole car hydrogen gas cylinder has the one-level relief pressure valve, the end-to-end connection of one-level relief pressure valve has the second grade relief pressure valve, the end-to-end connection of second grade relief pressure valve has total solenoid valve, the one end of total solenoid valve is equipped with main control unit.
Furthermore, a tee joint is arranged at the tail end of the master electromagnetic valve, one path of the tee joint of the master electromagnetic valve is connected with the electromagnetic valve, the tail end of the electromagnetic valve is connected with a fuel cell, and the other path of the tee joint of the master electromagnetic valve is connected with a steam-water separator.
Further, the tail end of the master electromagnetic valve is provided with an electromagnetic valve 1 and an electromagnetic valve N, the tail ends of the electromagnetic valve 1 and the electromagnetic valve N are communicated with an electric box, the master controller is communicated with the electromagnetic valve, and the master controller is communicated with the electromagnetic valve N.
Further, be equipped with hydrogen concentration sensor in the electronic box, smoke transducer in the electronic box, VOC sensor in the electronic box, CO sensor in the electronic box, temperature sensor in the electronic box, oxygen concentration sensor in the electronic box and electronic box pressure sensor in the electronic box, the outside intercommunication of electronic box has two three way solenoid valve, hydrogen concentration sensor in the electronic box, smoke transducer in the electronic box, VOC sensor in the electronic box, CO sensor in the electronic box, temperature sensor in the electronic box, oxygen concentration sensor in the electronic box, electronic box pressure sensor and two three way solenoid valve all communicate with main control unit.
Furthermore, the outer side of the main controller is communicated with a liquid nitrogen outlet electromagnetic valve, and one end of the outer side of the liquid nitrogen outlet electromagnetic valve is communicated with a liquid nitrogen bottle.
Furthermore, the outer side of the main controller is communicated with an equipment controller, and the other end of the equipment controller is communicated with equipment high pressure.
The invention also provides the following technical scheme: a method for suppressing fire and extinguishing fire of power battery box of fuel battery car by using said device includes such steps as using hydrogen as protecting gas, loading it in the box from top of battery box, extruding out air and other gas, using upper air inlet and lower air outlet structure to exhaust air and other gas in box, loading PACK in box in a safe environment, supplying hydrogen source to hydrogen cylinder of fuel battery, using steam-water separator to recover hydrogen for secondary utilization, emergency starting stored low-temp liquid nitrogen, quickly filling it in box, quickly lowering temp in box to lower than ignition point of combustible substance and isolating combustion-supporting gas, quickly lowering activity of PACK, and communicating with main controller of car, and cutting off the high voltage of the whole vehicle.
Further, the whole vehicle hydrogen gas cylinder provides a hydrogen gas source, the hydrogen gas source passes through a primary pressure reducing valve, a secondary pressure reducing valve and a main electromagnetic valve and respectively enters an electromagnetic valve and a fuel cell through a tee joint, the other tee joint enters an electromagnetic valve N and an electric box, the displaced hydrogen gas enters a steam-water separator through a two-position three-way valve, the hydrogen gas is separated and then enters a main pipeline again for cyclic utilization, a hydrogen concentration sensor, a smoke concentration sensor, a VOC sensor, a CO sensor, a temperature sensor, an oxygen concentration sensor and a pressure sensor are arranged in the electric box, various parameter indexes in the electric box are monitored in real time, a main controller comprehensively judges whether the electromagnetic valve 1 and the electromagnetic valve N which are connected with different electric boxes are opened or not according to the measured data of the sensors and the parameter comparison in set logic, the hydrogen gas is filled into the corresponding electric boxes, and after the electric box sensors detect the thermal runaway state of PACK in the electric boxes, the main control unit can with total solenoid valve, the solenoid valve, solenoid valve 1 and solenoid valve N communication, close total solenoid valve, the solenoid valve, solenoid valve 1 and solenoid valve N, fuel cell stop work, and simultaneously, main control unit is to two three way solenoid valve communication, it closes to be linked together the way with the catch water, the evacuation passageway is opened, replace the gaseous evacuation out with the electronic box is built-in, and simultaneously, main control unit is to the communication of equipment controller, set up the controller, the closing device high pressure, and simultaneously, main control unit is to the communication of liquid nitrogen bottle export solenoid valve, liquid nitrogen bottle export solenoid valve is opened, fill liquid nitrogen gas in the liquid nitrogen bottle fast in the electric box, with temperature reduction in the electronic box.
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, the hydrogen source is shared by the hydrogen bottle of the whole vehicle, the electric box, the main controller and the hydrogen bottle of the fuel cell vehicle, the installation space of the fire extinguishing agent is not required to be additionally increased, the weight of the whole vehicle is greatly reduced, the light weight of the vehicle is realized, the driving range of the vehicle is improved, hydrogen is used as the replacement gas of air and other gases in the electric box, the gas in the electric box can be completely replaced according to the inherent physical and chemical characteristics of the hydrogen, the purity of the hydrogen in the electric box is ensured, the gas in the electric box can be rapidly and cleanly replaced through the structure of upper air inlet and lower air exhaust, the gas replacement time is greatly shortened, valves for controlling gas inlet do not need to work for a long time, the power consumption is greatly saved, the driving range of the vehicle is improved, pure hydrogen in the electric box is included between low-voltage and high-voltage electrical elements, the ignition point of the electrical elements can be raised to 400 ℃ along with the hydrogen, and the battery temperature of the conventional electric box is less than or equal to 65 ℃ in the charging and discharging process, promote the electronic box risk temperature that catches fire by a wide margin, when the sensor detects the electronic box in the abnormal conditions, start the liquid nitrogen solenoid valve, fill the electronic box with low temperature liquid nitrogen fast, drop the temperature in the electronic box below the combustible substance ignition point rapidly, and isolated combustion-supporting gas, low temperature liquid nitrogen makes the battery activity reduce, the battery stops the power supply, main control unit is to whole car communication simultaneously, whole car controller cuts off equipment high pressure, guarantee battery and equipment safety, in the same way, main control unit is to the solenoid valve communication, close the main pipeline solenoid valve, fuel cell air inlet solenoid valve and fuel cell stop work, guarantee whole car and electronic box safety.
Drawings
FIG. 1 is an overall flow chart of the present invention;
FIG. 2 is a control logic diagram of the present invention.
In the figure: 1-a whole vehicle hydrogen gas cylinder, 2-a primary pressure reducing valve, 3-a secondary pressure reducing valve, 4-a steam-water separator, 5-a total electromagnetic valve, 6-a main controller, 7-a fuel cell, 8-an electromagnetic valve, 9-an electric box, 10-a hydrogen concentration sensor in the electric box, 11-a smoke sensor in the electric box, 12-a VOC sensor in the electric box, 13-a CO sensor in the electric box, 14-a temperature sensor in the electric box, 15-an oxygen concentration sensor in the electric box, 16-an internal pressure sensor in the electric box, 17-an electromagnetic valve 1, 18-an electromagnetic valve N, 19-a device controller, 20-a device high pressure, 21-a liquid nitrogen bottle outlet electromagnetic valve, 22-a liquid nitrogen bottle and 23-a two-position three-way electromagnetic valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution:
the utility model provides a be used for fuel cell car power battery case conflagration to restrain and extinguishing device, the external connection of whole car hydrogen gas cylinder 1 has one-level relief pressure valve 2, the end-to-end connection of one-level relief pressure valve 2 has second grade relief pressure valve 3, the end-to-end connection of second grade relief pressure valve 3 has total solenoid valve 5, the one end of total solenoid valve 5 is equipped with main control unit 6.
The tail end of the main electromagnetic valve 5 is provided with a tee joint, one path of the tee joint of the main electromagnetic valve 5 is connected with an electromagnetic valve 8, the tail end of the electromagnetic valve 8 is connected with a fuel cell 7, and the other path of the tee joint of the main electromagnetic valve 5 is connected with a steam-water separator 4.
The tail end of the main electromagnetic valve 5 is provided with an electromagnetic valve 117 and an electromagnetic valve N18, the tail ends of the electromagnetic valve 117 and the electromagnetic valve N18 are both communicated with an electric box 9, the main controller 6 is communicated with the electromagnetic valve 117, and the main controller 6 is communicated with the electromagnetic valve N18.
The solar energy power generation system is characterized in that the electric box 9 is internally provided with an electric box hydrogen concentration sensor 10, an electric box internal smoke sensor 11, an electric box internal VOC sensor 12, an electric box internal CO sensor 13, an electric box internal temperature sensor 14, an electric box internal oxygen concentration sensor 15 and an electric box internal pressure sensor 16, the outer side of the electric box 9 is communicated with a two-position three-way electromagnetic valve 23, the electric box internal hydrogen concentration sensor 10, the electric box internal smoke sensor 11, the electric box internal VOC sensor 12, the electric box internal CO sensor 13, the electric box internal temperature sensor 14, the electric box internal oxygen concentration sensor 15, the electric box internal pressure sensor 16 and the two-position three-way electromagnetic valve 23 are all communicated with the main controller 6.
The outer side of the main controller 6 is communicated with a liquid nitrogen outlet electromagnetic valve 21, and one end of the outer side of the liquid nitrogen outlet electromagnetic valve 21 is communicated with a liquid nitrogen bottle 22.
The outer side of the main controller 6 is communicated with an equipment controller 19, and the other end of the equipment controller 19 is communicated with an equipment high pressure 20.
A method for suppressing fire and extinguishing fire of power battery box of fuel battery car by using said device includes such steps as using hydrogen as protecting gas, loading it in the box from top of battery box, extruding out air and other gas, using upper air inlet and lower air outlet structure to exhaust air and other gas in box, loading PACK in box in a safe environment, supplying hydrogen source to hydrogen cylinder of fuel battery, using steam-water separator to recover hydrogen for secondary utilization, emergency starting stored low-temp liquid nitrogen, quickly filling it in box, quickly lowering temp in box to lower than ignition point of combustible substance and isolating combustion-supporting gas, quickly lowering activity of PACK, and communicating with main controller of car, and cutting off the high voltage of the whole vehicle.
The whole hydrogen gas bottle 1 provides a hydrogen gas source, the hydrogen gas source passes through a primary pressure reducing valve 2, a secondary pressure reducing valve 3 and a main electromagnetic valve 5 and respectively enters an electromagnetic valve 8 and a fuel cell 7 through a tee joint, the other tee joint enters an electromagnetic valve N and an electric box 9, the displaced hydrogen enters a steam-water separator 4 through a two-position three-way valve 23, the hydrogen is separated and then enters a main pipeline again, the hydrogen is recycled, a hydrogen concentration sensor 10 in the electric box, a smoke concentration sensor 11, a VOC sensor 12, a CO sensor 13, a temperature sensor 14, an oxygen concentration sensor 15 and a pressure sensor 16, various parameter indexes in the electric box are monitored in real time, and state information in the electric box is obtained. The main controller 6 comprehensively judges whether the electromagnetic valves 1 and N connected with different electric boxes 9 are opened or not according to the comparison of the measured data of the sensors and the parameters in the set logic, including pressure, temperature, oxygen, hydrogen, VOC, CO, smoke concentration and the like, and fills the hydrogen into the corresponding electric boxes 9, after the sensors of the electric boxes 9 detect the PACK thermal runaway state in the electric boxes, the main controller can communicate with the main electromagnetic valve 5, the electromagnetic valve 8, the electromagnetic valve 117 and the electromagnetic valve N18, the main electromagnetic valve 5, the electromagnetic valve 8, the electromagnetic valve 117 and the electromagnetic valve N18 are closed, the fuel cell 7 stops working, meanwhile, the main controller 6 communicates with the two-position three-way electromagnetic valve 23, the two-position three-way electromagnetic valve 23 is reversed, the channel communicated with the steam-water separator 4 is closed, the emptying channel is opened, the emptying gas is replaced in the electric boxes, meanwhile, the main controller 6 communicates with the equipment controller 19, and setting a controller 19, closing the high pressure 20 of the equipment, simultaneously communicating the main controller 6 to a liquid nitrogen bottle outlet electromagnetic valve 21, opening the liquid nitrogen bottle outlet electromagnetic valve 21, and quickly filling low-temperature nitrogen in a liquid nitrogen bottle 22 into the electric box 9 to reduce the temperature in the electric box. And finally stopping the electric box for maintenance until the electric box is restored to a normal state.
Example 1
The device comprises a whole vehicle hydrogen gas cylinder 1, wherein a primary pressure reducing valve 2 is connected to the outside of the whole vehicle hydrogen gas cylinder 1, the tail end of the primary pressure reducing valve 2 is connected with a secondary pressure reducing valve 3, the tail end of the secondary pressure reducing valve 3 is connected with a main electromagnetic valve 5, and one end of the main electromagnetic valve 5 is provided with a main controller 6.
The tail end of the main electromagnetic valve 5 is provided with a tee joint, one path of the tee joint of the main electromagnetic valve 5 is connected with an electromagnetic valve 8, the tail end of the electromagnetic valve 8 is connected with a fuel cell 7, and the other path of the tee joint of the main electromagnetic valve 5 is connected with a steam-water separator 4.
The tail end of the main electromagnetic valve 5 is provided with an electromagnetic valve 117 and an electromagnetic valve N18, the tail ends of the electromagnetic valve 117 and the electromagnetic valve N18 are both communicated with an electric box 9, the main controller 6 is communicated with the electromagnetic valve 117, and the main controller 6 is communicated with the electromagnetic valve N18.
The inside of the electric box 9 is provided with an inside hydrogen concentration sensor 10, an inside smoke sensor 11, an inside VOC sensor 12, an inside CO sensor 13, an inside temperature sensor 14, an inside oxygen concentration sensor 15 and an inside oxygen sensor 16, the outside of the electric box 9 is communicated with a two-position three-way electromagnetic valve 23, the inside hydrogen concentration sensor 10, the inside smoke sensor 11, the inside VOC sensor 12, the inside CO sensor 13, the inside temperature sensor 14, the inside oxygen concentration sensor 15, the inside pressure sensor 16 and the two-position three-way electromagnetic valve 23 are all communicated with the main controller 6, the displaced hydrogen enters the steam-water separator 4 through the two-position three-way electromagnetic valve 23, the hydrogen is separated out and enters the main pipeline again for recycling.
The outer side of the main controller 6 is communicated with a liquid nitrogen outlet electromagnetic valve 21, one end of the outer side of the liquid nitrogen outlet electromagnetic valve 21 is communicated with a liquid nitrogen bottle 22, various parameter indexes in the electric box are monitored in real time, and the main controller 6 comprehensively judges whether the electromagnetic valve 1 and the electromagnetic valve N connected with different electric boxes 9 are opened or not according to the comparison of the sensor measurement data and the parameters in the set logic, and fills hydrogen into the corresponding electric boxes 9.
The outer side of the main controller 6 is communicated with an equipment controller 19, the other end of the equipment controller 19 is communicated with an equipment high pressure 20, the main controller 6 communicates with a two-position three-way electromagnetic valve 23, a passage communicated with the steam-water separator 4 is closed, an emptying passage is opened, and the gas in the electric box is emptied.
The method for suppressing and extinguishing fire of the power battery box of the fuel battery car by using the device comprises the following working procedures: the invention adopts hydrogen as protective gas, the hydrogen is put into the box from the upper part of the battery box body, the hydrogen can be gathered at the top of the box body along with the increase of the hydrogen, other gases in the box body are replaced out of the battery box because of higher density than the hydrogen, the waterproof, breathable, moisture-proof and explosion-proof valve is arranged at the bottom of the electric box, theoretically, air and other gases in the electric box can be extruded by the hydrogen, the purity of the hydrogen in the electric box can reach 99.99, the ignition point of the high-purity hydrogen reaches more than 400 ℃, the ignition point of low-voltage and high-voltage wires in the conventional electric box is lower than 150 ℃, the air is isolated in the high-purity hydrogen environment, meanwhile, the combustible in the electric box is inhibited from burning, the ignition point of the combustible is improved to 400 ℃, the ignition risk in the electric box is greatly reduced, an upper air inlet and lower air outlet structure is adopted, the air and other gases in the electric box can be rapidly removed, and PACK in the electric box can be in a safe environment as soon as possible, the hydrogen source is shared by the hydrogen cylinder supplied by the fuel cell, a fire extinguishing device is not required to be additionally added, the light weight of the vehicle is realized, the driving range of the vehicle is improved, the cost is reduced, low-purity hydrogen exchanged in the electric box is recycled and reutilized by a steam-water separator, the utilization rate of the hydrogen is improved, the cost is saved, but in the thermal runaway state of the battery, low-temperature liquid nitrogen stored in the electric box is urgently started and quickly charged into the electric box, the temperature in the electric box is quickly reduced to be below the ignition point of combustible substances and combustion-supporting gas is isolated, the quick fire extinguishing is realized, the safety of the electric box and equipment is ensured, the activity of a battery PACK is quickly reduced by the low temperature of the liquid nitrogen at the same time, the power battery stops supplying power, meanwhile, a main controller of the fire extinguishing suppression device communicates with a main controller of the whole vehicle, the high pressure of the whole vehicle is cut off, the safety of the battery and the equipment are ensured, the hydrogen cylinder 1 of the whole vehicle provides a hydrogen source, a secondary pressure reducing valve 2 and a secondary pressure reducing valve 3 are arranged, a main electromagnetic valve 5 respectively enters an electromagnetic valve 8 and a fuel cell 7 through a tee joint, the other tee joint enters an electromagnetic valve N and an electric box 9, the displaced hydrogen enters a steam-water separator 4 through a two-position three-way valve 23 to be separated out and then enters a main pipeline again for cyclic utilization, a hydrogen concentration sensor 10, a smoke concentration sensor 11, a VOC sensor 12, a CO sensor 13, a temperature sensor 14, an oxygen concentration sensor 15 and a pressure sensor 16 in the electric box are monitored in real time, the main controller 6 comprehensively judges whether the electromagnetic valve 1 and the electromagnetic valve N which are connected with different electric boxes 9 are opened or not according to the measured data of the sensors and the parameter comparison in set logic, the hydrogen is filled into the corresponding electric box 9, and after the sensors of the electric boxes 9 detect the thermal runaway state of PACK in the electric boxes, the main controller can be in contact with the main electromagnetic valve 5, the electromagnetic valve 8 and the electric box 9, The electromagnetic valve 117 is communicated with the electromagnetic valve N18, the main electromagnetic valve 5, the electromagnetic valve 8, the electromagnetic valve 117 and the electromagnetic valve N18 are closed, the fuel cell 7 stops working, meanwhile, the main controller 6 communicates with the two-position three-way electromagnetic valve 23, a channel communicated with the steam-water separator 4 is closed, an emptying channel is opened, gas in the electric box is replaced and emptied, meanwhile, the main controller 6 communicates with the equipment controller 19, the controller 19 is arranged, the high pressure 20 of the equipment is closed, meanwhile, the main controller 6 communicates with the liquid nitrogen bottle outlet electromagnetic valve 21, the liquid nitrogen bottle outlet electromagnetic valve 21 is opened, low-temperature nitrogen in the liquid nitrogen bottle 22 is rapidly filled into the electric box 9, the temperature in the electric box is reduced, and thermal runaway is prevented.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a be used for fuel cell car power battery case conflagration to restrain and extinguishing device, includes whole car hydrogen gas cylinder (1), its characterized in that: the external connection of whole car hydrogen gas cylinder (1) has one-level relief pressure valve (2), the end-to-end connection of one-level relief pressure valve (2) has second grade relief pressure valve (3), the end-to-end connection of second grade relief pressure valve (3) has total solenoid valve (5), the one end of total solenoid valve (5) is equipped with main control unit (6).
2. A fire suppression and extinguishing device for a fuel cell vehicle power cell box according to claim 1, wherein: the tail end of the main electromagnetic valve (5) is provided with a tee joint, one path of the tee joint of the main electromagnetic valve (5) is connected with an electromagnetic valve (8), the tail end of the electromagnetic valve (8) is connected with a fuel cell (7), and the other path of the tee joint of the main electromagnetic valve (5) is connected with a steam-water separator (4).
3. A fire suppression and extinguishing device for a fuel cell vehicle power cell box according to claim 1, wherein: the tail end of the main electromagnetic valve (5) is provided with an electromagnetic valve 1(17) and an electromagnetic valve N (18), the tail ends of the electromagnetic valve 1(17) and the electromagnetic valve N (18) are communicated with an electric box (9), the main controller (6) is communicated with the electromagnetic valve 1(17), and the main controller (6) is communicated with the electromagnetic valve N (18).
4. A fire suppression and extinguishing device for a fuel cell vehicle power cell box according to claim 3, wherein: the solar energy power generation system is characterized in that an in-electric-box hydrogen concentration sensor (10), an in-electric-box smoke sensor (11), an in-electric-box VOC sensor (12), an in-electric-box CO sensor (13), an in-electric-box temperature sensor (14), an in-electric-box oxygen concentration sensor (15) and an in-electric-box pressure sensor (16) are arranged in the electric box (9), the outside of the electric box (9) is communicated with a two-position three-way electromagnetic valve (23), and the in-electric-box hydrogen concentration sensor (10), the in-electric-box smoke sensor (11), the in-electric-box VOC sensor (12), the in-electric-box CO sensor (13), the in-electric-box temperature sensor (14), the in-electric-box oxygen concentration sensor (15), the in-electric-box pressure sensor (16) and the two-way three-way electromagnetic valve (23) are all communicated with a main controller (6).
5. A fire suppression and extinguishing device for a fuel cell vehicle power cell box according to claim 1, wherein: the outer side of the main controller (6) is communicated with a liquid nitrogen outlet electromagnetic valve (21), and one end of the outer side of the liquid nitrogen outlet electromagnetic valve (21) is communicated with a liquid nitrogen bottle (22).
6. A fire suppression and extinguishing device for a fuel cell vehicle power cell box according to claim 1, wherein: the outer side of the main controller (6) is communicated with an equipment controller (19), and the other end of the equipment controller (19) is communicated with an equipment high pressure (20).
7. The method for suppressing and extinguishing a fire in a power battery box of a fuel cell vehicle by using the device according to any one of claims 1 to 6, wherein the method comprises the following steps: the method comprises the steps that hydrogen is used as protective gas, the gas enters a battery box body from the upper portion of the battery box body, air and other gas in the electric box can be extruded by the hydrogen, an upper gas inlet and lower gas exhaust structure is adopted to exhaust the air and other gas in the electric box, PACK in the electric box is enabled to be in a safe environment and supplies hydrogen to a fuel battery to share a hydrogen source, low-purity hydrogen exchanged in the electric box is recycled and reused through a steam-water separator, stored low-temperature liquid nitrogen is started in an emergency mode under the thermal runaway state of the battery and is rapidly charged into the electric box, the temperature in the electric box is rapidly reduced to be below the ignition point of combustible materials and is isolated from combustion-supporting gas, the activity of the PACK of the battery is rapidly reduced through the low-temperature liquid nitrogen, the power battery stops supplying power, a main controller of a fire extinguishing suppression device communicates with a main controller of the whole vehicle, and high pressure is cut off.
8. The method for fire suppression and fire extinguishing of a power cell box of a fuel cell vehicle using the device of claim 7, wherein: in the method, a hydrogen gas cylinder 1 of the whole vehicle provides a hydrogen gas source, the hydrogen gas source respectively enters an electromagnetic valve (8) and a fuel cell (7) through a primary pressure reducing valve (2), a secondary pressure reducing valve (3) and a main electromagnetic valve (5) through a tee joint, the other tee joint enters an electromagnetic valve N (18) and an electric box (9), the displaced hydrogen gas enters a steam-water separator (4) through a two-position three-way valve (23) to be separated out and then enters a main pipeline for cyclic utilization, a hydrogen concentration sensor (10) in the electric box, a smoke concentration sensor (11), a VOC sensor (12), a CO sensor (13), a temperature sensor (14), an oxygen concentration sensor (15) and a pressure sensor (16) are used for monitoring various parameter indexes in the electric box in real time, and a main controller (6) comprehensively judges whether the electromagnetic valve 1 and the electromagnetic valve N which are connected with different electric boxes (9) are opened or not according to the parameter comparison in the measurement data of the sensors and the set logic, filling hydrogen into a corresponding electric box (9), after a sensor of the electric box (9) detects a PACK thermal runaway state in the electric box, enabling a main controller to be communicated with a main electromagnetic valve (5), an electromagnetic valve (8), an electromagnetic valve 1(17) and an electromagnetic valve N (18), closing the main electromagnetic valve (5), the electromagnetic valve (8), the electromagnetic valve 1(17) and the electromagnetic valve N (18), stopping the fuel cell (7), meanwhile, enabling the main controller (6) to communicate with a two-position three-way electromagnetic valve (23), closing a channel communicated with a steam-water separator (4), opening an emptying channel, replacing gas in the electric box for emptying, meanwhile, enabling the main controller (6) to communicate with an equipment controller (19), setting a controller (19), closing the high pressure (20) of the equipment, meanwhile, enabling the main controller (6) to communicate with a liquid nitrogen bottle outlet electromagnetic valve (21), and opening the liquid nitrogen bottle outlet electromagnetic valve (21), the low-temperature nitrogen in the liquid nitrogen bottle 22 is rapidly filled into the electric box (9) to reduce the temperature in the electric box.
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| CN117919632A (en) * | 2024-03-25 | 2024-04-26 | 安徽中科中涣智能装备股份有限公司 | Cooling fire extinguishing explosion suppression injection system and method for energy storage power station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117919632A (en) * | 2024-03-25 | 2024-04-26 | 安徽中科中涣智能装备股份有限公司 | Cooling fire extinguishing explosion suppression injection system and method for energy storage power station |
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