CN117462886A - Power battery fire suppression system for hybrid electric locomotive and control method - Google Patents
Power battery fire suppression system for hybrid electric locomotive and control method Download PDFInfo
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- 230000001629 suppression Effects 0.000 title claims abstract description 39
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- 238000001816 cooling Methods 0.000 claims abstract description 31
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
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- 239000003795 chemical substances by application Substances 0.000 claims description 60
- 238000005507 spraying Methods 0.000 claims description 26
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- 230000000452 restraining effect Effects 0.000 abstract description 4
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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
- 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
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/005—Delivery of fire-extinguishing material using nozzles
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
-
- 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
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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Abstract
The invention relates to the technical field of batteries, in particular to a power battery fire suppression system for a hybrid electric vehicle and a control method. The power battery fire control method for the hybrid power locomotive comprises the following steps: monitoring the temperature of a power battery system in a battery cabinet; if the temperature in a battery pack or the highest temperature of a battery monomer in the power battery system is more than or equal to 80 ℃ and less than 120 ℃ and lasts for more than 10 seconds, executing a cooling process; after the cooling process is executed, if the temperature in a battery pack or the highest temperature of a battery monomer in the power battery system is more than or equal to 120 ℃ and lasts for more than 10 seconds, executing a fire extinguishing process. Compared with the prior art, the safety of the power battery system is improved, the temperature rise of the power battery can be restrained in time, the fire risk is reduced, the damage of the fire to the locomotive and the power battery system is reduced, the quick response of the power battery fire restraining system can prevent the environmental pollution caused by the fire, and the safety of drivers, passengers and property is guaranteed.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a power battery fire suppression system for a hybrid electric vehicle and a control method.
Background
With continuous progress in new energy technology, power cells have been used in hybrid locomotives as locomotive power systems. Along with the national advocations of green development of new energy and the continuous promotion of energy-saving and environment-friendly policies, the hybrid power locomotive has become the development trend of future locomotives. With the popularization and application of hybrid locomotives, power battery fires become an important safety hazard. Therefore, it is necessary to develop a fire suppression system suitable for a power battery for a hybrid locomotive and determine a control method thereof in combination with the fire characteristics of the power battery. The invention can find out early to prevent the ignition and the fire spreading of the power battery and reduce the harm to locomotives and drivers and passengers. The handling capacity of fire accidents is improved, the fire occurrence rate is reduced, and the reliability of the power battery system is improved.
The safety monitoring system is installed on part of locomotives, and comprises a host, a display screen, a smoke detector and a camera. And a smoke detector and a camera are arranged among the machines of the locomotive, and after the smoke detector detects smoke, a display screen arranged on a cab console is automatically switched to a camera picture at an alarm position, and an alarm is sent out to remind drivers and passengers. Meanwhile, the cab is provided with a carbon dioxide fire extinguishing tank, so that local small fire can be treated in an emergency way. The power battery fire disaster is different from the traditional electric appliance fire disaster, has the characteristic of severe combustion, and the fire is rapidly spread and difficult to control, and the safety monitoring system in the vehicle has only a monitoring alarm function and cannot realize automatic inhibition and fire extinguishment. The non-professional can not implement the operation of putting out a fire to power battery, and fire extinguishing agent often can not reach the fire source position rapidly, can't in time prevent the intensity of a fire to spread in the short time, has also increased the threat to the driver and passenger. Based on this, the prior art still remains to be improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a power battery fire suppression system for a hybrid electric vehicle and a control method thereof, so as to solve the problem that the existing power battery has potential safety hazard.
The power battery fire control method for the hybrid power locomotive comprises the following steps:
monitoring the temperature of a power battery system in a battery cabinet; if the temperature in a battery pack or the highest temperature of a battery monomer in the power battery system is more than or equal to 80 ℃ and less than 120 ℃ and lasts for more than 10 seconds, executing a cooling process; after the cooling process is executed, if the temperature in a battery pack or the highest temperature of a battery monomer in the power battery system is more than or equal to 120 ℃ and lasts for more than 10 seconds, executing a fire extinguishing process.
Further, the power battery fire control method for the hybrid locomotive further comprises the following steps: and monitoring the concentration of the special gas in the battery pack in the power battery system, and if the concentration of the special gas in the battery pack exceeds the preset threshold value, executing a cooling process for the battery pack.
Further, the cooling process comprises the following steps: continuously spraying fire extinguishing agent to a battery pack with the temperature of more than or equal to 80 ℃ and less than 120 ℃ for more than 10 seconds, or continuously spraying fire extinguishing agent to a battery pack with the special gas concentration in the battery pack exceeding a preset threshold value, and closing after the fire extinguishing agent reaches the fire extinguishing dose of one battery pack.
Further, the fire extinguishing process includes: establishing a single-package fire extinguishing concentration within 10 seconds, continuously spraying fire extinguishing agent to a battery pack with the temperature of more than or equal to 120 ℃ and the duration of more than 10 seconds, and temporarily closing the continuous spraying action after 10 seconds; after the continuous spraying action is temporarily closed, the fire extinguishing agent is sprayed in a point-action manner.
Further, the step of spraying the fire extinguishing agent by inching includes: spraying is carried out once every 1 minute for 30 minutes, and then spraying is carried out every 2 minutes until the fire extinguishing agent is completely sprayed.
The power battery fire suppression system for the hybrid electric locomotive comprises an external detection unit, a fire extinguishing execution unit and a control wire harness; the external detection unit is used for identifying and detecting the temperature and the gas concentration in the battery pack; the fire extinguishing execution unit is arranged to execute a cooling process or a fire extinguishing process according to the temperature and the gas concentration in the battery pack acquired by the external detection unit; the control harness is configured to connect the external detection unit and the fire suppression execution unit.
Further, the fire-extinguishing execution unit at least comprises a fire-extinguishing agent liquid storage tank, a spray head, a conveying pipeline and a pump set; the fire extinguishing agent liquid storage tank stores fire extinguishing agent, the spray head is arranged on an interface at the outer side of the battery pack and used for spraying the fire extinguishing agent into the battery pack, and the conveying pipeline is used for conveying the fire extinguishing agent in the fire extinguishing agent liquid storage tank to the spray head; the pump unit is arranged to provide kinetic energy for the spray head to spray the fire extinguishing agent.
Further, the power battery system further comprises a battery management system, the power battery fire suppression system for the hybrid locomotive further comprises a fire control controller, the fire control controller is connected with the fire control controller through a control wire harness, and the fire control controller can directly read the temperature acquired by the battery management system and control the fire extinguishing execution unit according to the read temperature.
Further, the power battery fire suppression system for the hybrid electric vehicle further comprises a 2-way flow dividing valve, wherein the 2-way flow dividing valve is used for dividing the interior of the battery cabinet into an area A and an area B, a plurality of battery packs are arranged in the area A and the area B, and each battery pack is provided with an independent external detection unit; the two fire extinguishing agent liquid storage tanks correspond to the battery packs in the area A and the area B respectively, and the two fire extinguishing agent liquid storage tanks are redundant.
Further, the power battery fire suppression system for the hybrid locomotive is communicated with the battery management system and the microcomputer system through Ethernet, the battery management system transmits the battery temperature to the power battery fire suppression system for the hybrid locomotive in real time, meanwhile, when a fire occurs, the power battery fire suppression system for the hybrid locomotive automatically performs cooling suppression, simultaneously sends fire alarm information to the locomotive microcomputer, and simultaneously pre-judges the fire condition in advance, and is disconnected with the main loop through an internal contactor of the power battery system.
The beneficial effects of the invention are as follows: aiming at the thermal runaway characteristics of the power battery, the invention captures the rapid rise of the battery temperature before the thermal runaway of the battery, distinguishes the battery temperature from other heat sources or temperature rise phenomena, and simultaneously starts a cooling process to cool down so as to inhibit the continuous rise of the battery monomer temperature. After the cooling process is finished, the temperatures of the battery pack and the battery monomer are continuously monitored, and if the highest temperature of the battery monomer is still increased, the fire extinguishing process is started. Compared with the prior art, the application scheme improves the safety of the power battery system, can timely restrain the temperature rise of the power battery, reduces the risk of fire, reduces the damage of the fire to locomotives and the power battery system, can prevent the environmental pollution caused by the fire due to the rapid response of the power battery fire restraining system, and ensures the safety of drivers, passengers and property.
Furthermore, the power battery fire suppression system for the hybrid locomotive has detection and identification technologies, can effectively reduce the risk of power battery fire occurrence, improves the reliability of the system, enhances the trust and acceptance of users to the hybrid locomotive, and promotes the healthy development of the hybrid locomotive industry.
Drawings
Fig. 1 shows a schematic flow chart of a power battery fire control method for a hybrid locomotive according to an embodiment of the present invention;
fig. 2 is a schematic diagram showing a configuration of a fire suppression system structure of a power battery for a hybrid locomotive in a battery cabinet according to an embodiment of the present invention;
fig. 3 is a schematic diagram showing a part of a power battery fire suppression system for a hybrid electric vehicle according to an embodiment of the present invention;
fig. 4 shows a circuit diagram of the inside of a battery control system provided by an embodiment of the present invention.
Reference numerals illustrate: 1. a fire extinguishing execution unit; 2. a fire control controller; 3. a delivery conduit; 4. a branch control valve; 5. a diverter valve; 6. a spray head; 7. an external detection unit.
Detailed Description
It should be understood that the embodiments of the invention shown in the exemplary embodiments are only illustrative. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art will readily appreciate that many modifications are possible without materially departing from the teachings of the subject matter of this disclosure. Accordingly, all such modifications are intended to be included within the scope of present invention. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and parameters of the exemplary embodiments without departing from the spirit of the present inventions.
As shown in fig. 1, a power battery fire control method for a hybrid locomotive includes the steps of:
monitoring the temperature of a power battery system in a battery cabinet;
if the temperature in a battery pack or the highest temperature of a battery monomer in the power battery system is more than or equal to 80 ℃ and 120 ℃ and lasts for more than 10 seconds, executing a cooling process;
after the cooling process is finished, if the temperature in a battery pack or the highest temperature of a battery monomer in the power battery system is more than or equal to 120 ℃ and lasts for more than 10 seconds, executing a fire extinguishing process.
The power battery fire disaster is different from the prior electric appliance fire disaster, has the characteristic of severe combustion, and the fire is spread rapidly and is difficult to control, and the safety monitoring system in the vehicle in the prior art has only a monitoring alarm function and cannot realize automatic inhibition and fire extinguishing. According to the scheme, aiming at the thermal runaway characteristics of the power battery, the rapid temperature rise of the battery is captured before the thermal runaway of the battery, the battery is distinguished from other heat sources or temperature rise phenomena, and meanwhile, the cooling flow is started to cool down, so that the continuous temperature rise of the battery monomer is restrained. After the cooling process is finished, continuously monitoring the temperatures of the battery pack and the battery cells, and starting the fire extinguishing process if the highest temperature of the battery cells is still increased. Compared with the prior art, the safety of the power battery system is improved, the temperature rise of the power battery can be restrained in time, the fire risk is reduced, the damage of the fire to the locomotive and the power battery system is reduced, the quick response of the power battery fire restraining system can prevent the environmental pollution caused by the fire, and the safety of drivers, passengers and property is guaranteed.
In some embodiments, the power cell fire control method for a hybrid locomotive further comprises: and monitoring the concentration of the special gas in the battery pack in the power battery system, and if the concentration of the special gas in the battery pack exceeds the preset threshold value, executing a cooling process on the area where the battery pack belongs. Specifically, when a pressure release valve is opened due to sudden abnormality of a certain battery cell, special gases such as CO are released into the environment, if the concentration of the special gases such as CO in a battery pack exceeds a preset threshold value, the risk of fire occurrence of the certain battery cell is high, cooling treatment is needed, abnormal conditions of the battery pack where the battery cell is located are interfered, and thermal runaway or thermal expansion of the battery is prevented.
In summary, the judgment logic of the fire control method of the power battery for the hybrid locomotive is mainly divided into two main categories: (1) temperature abnormality determination logic (battery pack temperature or cell temperature); (2) and special gas concentration abnormality judgment logic (characteristic gas concentration in the battery pack exceeds a threshold value). The two judgment logics are mutually independent judgment, and any condition is triggered, so that corresponding cooling flow actions are automatically executed.
In some embodiments, the cooling process includes: the temperature is more than or equal to 80℃ and<the battery pack which is at 120 ℃ and lasts for more than 10 seconds continuously sprays the fire extinguishing agent, or the fire extinguishing agent is continuously sprayed to the battery pack of which the special gas concentration in the battery pack exceeds a preset threshold value, and the battery pack is closed after the fire extinguishing agent reaches the fire extinguishing agent of one battery pack. Specifically, the calculation formula of the amount of the fire extinguishing agent is W= (V/S) [ C/(100-C)]The method comprises the steps of carrying out a first treatment on the surface of the Wherein w=design amount of fire extinguishing agent (kg); v=protected area volume (m 3 ) The method comprises the steps of carrying out a first treatment on the surface of the C=design concentration (%) of fire extinguishing agent; s=specific volume of steam (m 3 /kg)。
In some embodiments, the fire suppression procedure includes: establishing a single-package fire extinguishing concentration within 10 seconds, continuously spraying fire extinguishing agent to a battery pack with the temperature of more than or equal to 120 ℃ and the duration of more than 10 seconds, and temporarily closing the continuous spraying action after 10 seconds; after the continuous spraying action is temporarily closed, the fire extinguishing agent is sprayed in a point-action mode, and the fire extinguishing agent is used for restraining thermal runaway of a battery cell or a battery pack or extinguishing flames generated in the initial stage of the thermal runaway. Wherein, the single-package fire-extinguishing concentration refers to the minimum volume percentage of the gas fire-extinguishing agent in the air required for extinguishing a fire under the atmospheric pressure of 101KPa and the specified temperature. For example, the single package fire suppression concentration of the perfluorinated hexanone fire suppression agent is typically 4% -6%.
In some embodiments, the pilot-sprayed fire suppression agent comprises: spraying is carried out once every 1 minute for 30 minutes, and then spraying is carried out every 2 minutes until the fire extinguishing agent is completely sprayed, so that the re-burning of the battery pack or the battery unit is inhibited.
As shown in fig. 2 and 3, the present invention also provides a power battery fire suppression system for a hybrid locomotive, which comprises an external detection unit 7, a fire extinguishing execution unit 1 and a control harness. The external detection unit 7 is used for identifying and detecting the temperature and the gas concentration in the battery pack. The fire extinguishing performing unit 1 is configured to perform a cooling process or a fire extinguishing process according to the temperature and the gas concentration in the battery pack acquired by the external detecting unit 7. The control harness is arranged to connect the external detection unit 7 with the fire extinguishing execution unit 1 and control the spraying mode of the fire extinguishing execution unit 1. The external detection unit 7 comprises an internal temperature detection device in the battery pack and a special gas concentration detection device in the battery pack, so that the fire condition is ensured to be found in the initial stage of thermal runaway of the power battery.
In some embodiments, the fire extinguishing execution unit 1 comprises a fire extinguishing agent liquid storage tank, a spray head 6, a conveying pipeline 3, a pump group, a relay module and other parts. The fire extinguishing agent liquid storage tank stores fire extinguishing agent, such as perfluoro-hexanone fire extinguishing medium; the spray head 6 is an atomization spray head, is arranged on an interface at the outer side of the battery pack and is used for spraying fire extinguishing agent into the battery pack, and the conveying pipeline 3 is used for conveying the fire extinguishing agent in the fire extinguishing agent liquid storage tank to the atomization spray head. The pump group is arranged to provide power for the atomization nozzle to spray the fire extinguishing agent, and the relay module is arranged between the external detection unit 7 and the fire extinguishing execution unit 1 to complete signal isolation transmission of the external detection unit 7 and expand the communication distance of the external detection unit 7.
In some embodiments, the power battery system further includes a battery management system, and the power battery fire suppression system for a hybrid locomotive further includes a fire control controller 2, wherein the fire control controller 2 is connected to the fire control controller 2 through a control harness, and the fire control controller 2 can directly read the temperature collected by the battery management system (hereinafter referred to as BMS) and control the fire extinguishing execution unit 1 according to the read temperature.
In some embodiments, the power battery fire suppression system for the hybrid locomotive further comprises a 2-way diverter valve 5, a branch control valve 4 is arranged between the 2-way diverter valves 5, a conveying pipeline 3 for controlling fire extinguishing agent to enter, the 2-way diverter valve 5 is arranged to divide the interior of the battery cabinet into an area A and an area B, and a plurality of battery packs are arranged in the area A and the area B, each battery pack comprises a plurality of battery units, and each battery pack is provided with an independent external detection unit 7; the fire extinguishing agent liquid storage pot has two, and two fire extinguishing agent liquid storage pot correspond the battery package in A district and the B district respectively, and two fire extinguishing agent liquid storage pot are redundant each other, according to the condition of a fire, fire control controller automatic start one or more shunt valves, the injection dosage of accurate control fire extinguishing agent, this application scheme arranges fire extinguishing device in reasonable region to can arrive the source of a fire fast when the conflagration takes place, considers the characteristics of heat spreading simultaneously, avoids dead angle and omission area. Specifically, the embodiment of the invention also provides a plurality of using conditions, as shown in fig. 3, two fire extinguishing agent liquid tanks are respectively a fire steel bottle A and a fire steel bottle B, a steel bottle electromagnetic valve A is arranged on the fire steel bottle A, a steel bottle electromagnetic valve B is arranged on the fire steel bottle B, an A area pipeline and a B area pipeline which respectively penetrate through the A area and the B area are arranged in the battery cabinet, a plurality of spray heads 6 are respectively arranged on the A area pipeline and the B area pipeline, each spray head 6 corresponds to a battery unit of a battery pack, the A area pipeline and the B area pipeline are connected with the steel bottle electromagnetic valve A and the steel bottle electromagnetic valve B through a conveying pipeline 3, and check valves are arranged on pipelines which are connected with the steel bottle electromagnetic valve A and the steel bottle electromagnetic valve B, and the check valves only allow the fire extinguishing agent to be discharged from the fire extinguishing agent liquid tanks.
Taking a certain battery pack in the area A as an example:
working condition 1: when the temperature of the battery pack exceeds 80 ℃ and is maintained for more than 10 seconds, the fire steel bottle A does not give a leakage alarm, the fire steel bottle A is started, meanwhile, a pipeline electromagnetic valve A corresponding to the battery pack in the area A is started, and a cooling flow is executed to perform cooling inhibition action;
working condition 2: on the premise that the temperature of the battery pack in the area A exceeds 80 ℃ and is maintained for more than 10 seconds, the fire-fighting steel bottle A leaks and alarms, the fire-fighting steel bottle B is started to execute a cooling process on the battery pack in the area A so as to protect the battery pack in the area A;
working condition 3: the temperature of the battery pack in the area A exceeds 80 ℃ and is maintained for more than 10 seconds, if the electromagnetic valve A of the steel cylinder on the fire-fighting steel cylinder A fails, the fire-fighting steel cylinder B is started to execute a cooling process on the abnormal battery pack in the area A so as to protect the abnormal battery pack in the area A;
working condition 4: after the temperature of the battery pack in the area A exceeds 80 ℃ and is maintained for more than 10 seconds and the fire-fighting steel bottle A completes the cooling process, the battery pack still rises to more than 120 ℃ and is maintained for more than 10 seconds, and then the fire-fighting steel bottle B is started to execute the fire-fighting process on the abnormal battery pack in the area A;
working condition 5: after the temperature of the battery pack in the area A is abnormal and the temperature of the battery in the area B is maintained for more than 10 seconds after the temperature reduction process is carried out by the fire-fighting steel bottle A, closing a pipeline electromagnetic valve A corresponding to the battery in the area A, opening a pipeline electromagnetic valve B corresponding to the battery in the area B, simultaneously opening the fire-fighting steel bottle B, and spraying the perfluorinated hexanone medium in the fire-fighting steel bottle B into the abnormal battery pack in the area B.
In some embodiments, the power battery fire suppression system for the hybrid locomotive communicates with the BMS and the microcomputer system through Ethernet, the battery management system transmits the battery temperature to the power battery fire suppression system for the hybrid locomotive in real time, and meanwhile, when a fire occurs, the power battery fire suppression system for the hybrid locomotive automatically performs cooling suppression and simultaneously sends fire alarm information to the locomotive microcomputer, so that measures are taken in time, and meanwhile, the fire condition is pre-judged in advance, and the connection with a main loop is cut off through a contactor inside the power battery system. As shown in fig. 4, the present invention provides a circuit diagram of the interior of a conventional power cell system, wherein the circuit is connected to the locomotive micro-electromechanical system.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention; modifications and equivalent substitutions are intended to be included in the scope of the claims without departing from the spirit and scope of the present invention.
Claims (10)
1. The power battery fire control method for the hybrid power locomotive is characterized by comprising the following steps of:
monitoring the temperature of a power battery system in a battery cabinet;
if the temperature in a battery pack or the highest temperature of a battery monomer in the power battery system is more than or equal to 80 ℃ and less than 120 ℃ and lasts for more than 10 seconds, executing a cooling process;
after the cooling process is executed, if the temperature in a battery pack or the highest temperature of a battery monomer in the power battery system is more than or equal to 120 ℃ and lasts for more than 10 seconds, executing a fire extinguishing process.
2. The power cell fire control method for a hybrid vehicle according to claim 1, further comprising: and monitoring the concentration of the special gas in the battery pack in the power battery system, and if the concentration of the special gas in the battery pack exceeds the preset threshold value, executing a cooling process for the battery pack.
3. The power cell fire control method for a hybrid locomotive according to claim 2, wherein the cooling process includes:
continuously spraying fire extinguishing agent to a battery pack with the temperature of more than or equal to 80 ℃ and less than 120 ℃ for more than 10 seconds, or continuously spraying fire extinguishing agent to a battery pack with the special gas concentration in the battery pack exceeding a preset threshold value, and closing after the fire extinguishing agent reaches the fire extinguishing dose of one battery pack.
4. The method for controlling a power cell fire for a hybrid locomotive according to claim 1, wherein the fire extinguishing process comprises:
establishing a single-package fire extinguishing concentration within 10 seconds, continuously spraying fire extinguishing agent to a battery pack with the temperature of more than or equal to 120 ℃ and the duration of more than 10 seconds, and temporarily closing the continuous spraying action after 10 seconds;
after the continuous spraying action is temporarily closed, the fire extinguishing agent is sprayed in a point-action manner.
5. The method of claim 4, wherein the step of spraying the fire extinguishing agent by the power cell for the hybrid vehicle comprises the steps of: spraying is carried out once every 1 minute for 30 minutes, and then spraying is carried out every 2 minutes until the fire extinguishing agent is completely sprayed.
6. The power battery fire suppression system for the hybrid electric vehicle is characterized by comprising an external detection unit, a fire extinguishing execution unit and a control wire harness; the external detection unit is used for identifying and detecting the temperature and the gas concentration in the battery pack; the fire extinguishing execution unit is arranged to execute a cooling process or a fire extinguishing process according to the temperature and the gas concentration in the battery pack acquired by the external detection unit; the control harness is arranged to connect the external detection unit and the fire extinguishing execution unit.
7. The power cell fire suppression system for a hybrid locomotive as recited in claim 6 wherein said fire suppression execution unit comprises at least a fire suppressant reservoir, a spray head, a delivery conduit, and a pump stack; the fire extinguishing agent storage tank is stored with fire extinguishing agent, the spray head is arranged on an interface at the outer side of the battery pack and used for spraying the fire extinguishing agent into the battery pack, and the conveying pipeline is used for conveying the fire extinguishing agent in the fire extinguishing agent storage tank to the spray head; the pump assembly is configured to provide kinetic energy for the spray head to spray the fire suppressant.
8. The fire suppression system of a hybrid locomotive power battery according to claim 6, further comprising a battery management system, wherein the hybrid locomotive power battery fire suppression system further comprises a fire control controller, the fire control controller is connected with the fire control controller through a control wire harness, the fire control controller is capable of directly reading the temperature collected by the battery management system and controlling the fire extinguishing execution unit according to the read temperature.
9. The fire suppression system of a power battery for a hybrid locomotive as recited in claim 7, further comprising a 2-way diverter valve, the 2-way diverter valve configured to divide the interior of the battery compartment into a zone a and a zone B, each of the zone a and the zone B having a plurality of battery packs therein, each battery pack having an independent external detection unit; the two fire extinguishing agent liquid storage tanks correspond to the battery packs in the area A and the area B respectively, and the two fire extinguishing agent liquid storage tanks are redundant.
10. The fire suppression system of a power battery for a hybrid locomotive according to claim 8, wherein the fire suppression system of the power battery for the hybrid locomotive communicates with a battery management system and a microcomputer system through an ethernet network, the battery management system transmits the battery temperature to the fire suppression system of the power battery for the hybrid locomotive in real time, and simultaneously when a fire occurs, the fire suppression system of the power battery for the hybrid locomotive automatically performs cooling suppression and simultaneously transmits fire information to a locomotive microcomputer, and simultaneously pre-judges the fire condition in advance, and is disconnected from a main circuit through a contactor inside the power battery system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311437480.3A CN117462886A (en) | 2023-10-30 | 2023-10-30 | Power battery fire suppression system for hybrid electric locomotive and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311437480.3A CN117462886A (en) | 2023-10-30 | 2023-10-30 | Power battery fire suppression system for hybrid electric locomotive and control method |
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