CN113827893A - Fire extinguishing device and method for battery compartment - Google Patents
Fire extinguishing device and method for battery compartment Download PDFInfo
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- CN113827893A CN113827893A CN202110790269.4A CN202110790269A CN113827893A CN 113827893 A CN113827893 A CN 113827893A CN 202110790269 A CN202110790269 A CN 202110790269A CN 113827893 A CN113827893 A CN 113827893A
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- fire
- cooling
- battery compartment
- temperature
- air
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 171
- 230000007246 mechanism Effects 0.000 claims abstract description 96
- 230000001629 suppression Effects 0.000 claims abstract description 92
- 239000007788 liquid Substances 0.000 claims abstract description 84
- 238000001514 detection method Methods 0.000 claims abstract description 29
- 230000001360 synchronised effect Effects 0.000 claims abstract description 4
- 239000002826 coolant Substances 0.000 claims description 49
- 239000007789 gas Substances 0.000 claims description 16
- 150000004292 cyclic ethers Chemical class 0.000 claims description 9
- -1 perfluoro Chemical group 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- KSOCRXJMFBYSFA-UHFFFAOYSA-N 1,1,1,2,2,3,3,4,4,5,6,6,6-tridecafluoro-5-(1,1,1,2,3,3,4,4,5,5,6,6,6-tridecafluorohexan-2-yloxy)hexane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(C(F)(F)F)OC(F)(C(F)(F)F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F KSOCRXJMFBYSFA-UHFFFAOYSA-N 0.000 claims description 3
- PGISRKZDCUNMRX-UHFFFAOYSA-N 1,1,1,2,2,3,3,4,4-nonafluoro-4-(trifluoromethoxy)butane Chemical group FC(F)(F)OC(F)(F)C(F)(F)C(F)(F)C(F)(F)F PGISRKZDCUNMRX-UHFFFAOYSA-N 0.000 claims description 3
- TVOMDPDLBZJPTG-UHFFFAOYSA-N 1,1,1,2,2,3,3,4,4-nonafluoro-4-propoxybutane Chemical compound CCCOC(F)(F)C(F)(F)C(F)(F)C(F)(F)F TVOMDPDLBZJPTG-UHFFFAOYSA-N 0.000 claims description 3
- NOPJRYAFUXTDLX-UHFFFAOYSA-N 1,1,1,2,2,3,3-heptafluoro-3-methoxypropane Chemical compound COC(F)(F)C(F)(F)C(F)(F)F NOPJRYAFUXTDLX-UHFFFAOYSA-N 0.000 claims description 3
- GCDWNCOAODIANN-UHFFFAOYSA-N 1,1,1,2,2-pentafluoro-2-methoxyethane Chemical compound COC(F)(F)C(F)(F)F GCDWNCOAODIANN-UHFFFAOYSA-N 0.000 claims description 3
- CGYSGEFXYQMNJM-UHFFFAOYSA-N 1,1,2,2,2-pentafluoro-n,n-bis(trifluoromethyl)ethanamine Chemical compound FC(F)(F)N(C(F)(F)F)C(F)(F)C(F)(F)F CGYSGEFXYQMNJM-UHFFFAOYSA-N 0.000 claims description 3
- SXKNYNUXUHCUHX-UHFFFAOYSA-N 1,1,2,3,3,4-hexafluorobut-1-ene Chemical compound FCC(F)(F)C(F)=C(F)F SXKNYNUXUHCUHX-UHFFFAOYSA-N 0.000 claims description 3
- XMEMIJBXYCTOMD-UHFFFAOYSA-N 1-(1,1,2,2,2-pentafluoroethoxy)butane Chemical compound CCCCOC(F)(F)C(F)(F)F XMEMIJBXYCTOMD-UHFFFAOYSA-N 0.000 claims description 3
- VSHZYKQXSOVQDR-UHFFFAOYSA-N 1-(1,1,2,2,3,3,3-heptafluoropropoxy)butane Chemical compound CCCCOC(F)(F)C(F)(F)C(F)(F)F VSHZYKQXSOVQDR-UHFFFAOYSA-N 0.000 claims description 3
- JTNNVZKEKJAWNR-UHFFFAOYSA-N 1-(trifluoromethoxy)butane Chemical compound CCCCOC(F)(F)F JTNNVZKEKJAWNR-UHFFFAOYSA-N 0.000 claims description 3
- IJXMZQDVWODQAR-UHFFFAOYSA-N 1-(trifluoromethoxy)pentane Chemical compound CCCCCOC(F)(F)F IJXMZQDVWODQAR-UHFFFAOYSA-N 0.000 claims description 3
- ZNPNIRDITDQGKG-UHFFFAOYSA-N 1-(trifluoromethoxy)propane Chemical compound CCCOC(F)(F)F ZNPNIRDITDQGKG-UHFFFAOYSA-N 0.000 claims description 3
- HNQMKNFMSPECFD-UHFFFAOYSA-N 1-ethoxy-1,1,2,2,3,3,3-heptafluoropropane Chemical compound CCOC(F)(F)C(F)(F)C(F)(F)F HNQMKNFMSPECFD-UHFFFAOYSA-N 0.000 claims description 3
- QKBKGNDTLQFSEU-UHFFFAOYSA-N 2-bromo-3,3,3-trifluoroprop-1-ene Chemical compound FC(F)(F)C(Br)=C QKBKGNDTLQFSEU-UHFFFAOYSA-N 0.000 claims description 3
- IZHPSCJEIFFRLN-UHFFFAOYSA-N 3,3,4,4,4-pentafluorobut-1-ene Chemical compound FC(F)(F)C(F)(F)C=C IZHPSCJEIFFRLN-UHFFFAOYSA-N 0.000 claims description 3
- BNLLWAALHYCOQM-UHFFFAOYSA-N 3,3,4,4-tetrafluorobut-1-ene Chemical compound FC(F)C(F)(F)C=C BNLLWAALHYCOQM-UHFFFAOYSA-N 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- QOFGGNBBKFDFJX-UHFFFAOYSA-N bromomethoxy(trifluoro)methane Chemical compound [H]C([H])(Br)OC(F)(F)F QOFGGNBBKFDFJX-UHFFFAOYSA-N 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 238000007710 freezing Methods 0.000 claims description 3
- 230000008014 freezing Effects 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229950008618 perfluamine Drugs 0.000 claims description 3
- RVZRBWKZFJCCIB-UHFFFAOYSA-N perfluorotributylamine Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)N(C(F)(F)C(F)(F)C(F)(F)C(F)(F)F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F RVZRBWKZFJCCIB-UHFFFAOYSA-N 0.000 claims description 3
- AQZYBQIAUSKCCS-UHFFFAOYSA-N perfluorotripentylamine Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)N(C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F AQZYBQIAUSKCCS-UHFFFAOYSA-N 0.000 claims description 3
- JAJLKEVKNDUJBG-UHFFFAOYSA-N perfluorotripropylamine Chemical compound FC(F)(F)C(F)(F)C(F)(F)N(C(F)(F)C(F)(F)C(F)(F)F)C(F)(F)C(F)(F)C(F)(F)F JAJLKEVKNDUJBG-UHFFFAOYSA-N 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- ZPVFXWAIPNKSLJ-UHFFFAOYSA-N trifluoromethoxyethane Chemical compound CCOC(F)(F)F ZPVFXWAIPNKSLJ-UHFFFAOYSA-N 0.000 claims description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims 1
- 238000005507 spraying Methods 0.000 abstract description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 9
- 238000004146 energy storage Methods 0.000 description 9
- 229910001416 lithium ion Inorganic materials 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000007480 spreading Effects 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- UKACHOXRXFQJFN-UHFFFAOYSA-N heptafluoropropane Chemical compound FC(F)C(F)(F)C(F)(F)F UKACHOXRXFQJFN-UHFFFAOYSA-N 0.000 description 3
- WZASSYDMYUZHRC-UHFFFAOYSA-N 1,2,2-trifluoro-n,n-bis(trifluoromethyl)ethenamine Chemical compound FC(F)=C(F)N(C(F)(F)F)C(F)(F)F WZASSYDMYUZHRC-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
Images
Classifications
-
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
-
- 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
-
- 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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
-
- 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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a fire extinguishing device and method for a battery compartment, wherein a fire detection mechanism is arranged in the battery compartment and is close to a battery module; the air exhaust mechanism is arranged in the battery cabin and is used for exhausting the gas in the battery cabin; the liquid cooling fire suppression mechanism comprises a liquid cooling pipeline and a fire suppression nozzle arranged on the liquid cooling pipeline, and the fire suppression nozzle is used for spraying liquid cooling fire suppression medium; the fire detection mechanism, the air exhaust mechanism and the fire suppression nozzle are electrically connected with the controller, the fire detection mechanism is configured to detect a fire occurrence signal and send the detected fire occurrence signal to the controller, and the controller is configured to control the synchronous opening of the air exhaust mechanism and the fire suppression nozzle according to the fire occurrence signal. According to the battery compartment fire extinguishing device, the liquid cooling fire suppression mechanism is used for continuously cooling the battery module, and meanwhile, when a fire disaster occurs, air exhaust and liquid cooling fire suppression medium cooling are synchronously performed in the battery compartment, so that the open fire is quickly suppressed, the fire disaster is extinguished, and the fire extinguishing efficiency is improved.
Description
Technical Field
The invention relates to the technical field of battery fire extinguishing, in particular to a fire extinguishing device and method for a battery compartment.
Background
With the development of science and technology, the energy storage technology of the lithium ion battery is developed rapidly, but the lithium ion energy storage battery is a huge energy carrier and contains stored electric energy, and combustible electrodes and organic electrolyte in the lithium ion energy storage battery can also generate huge energy when being combusted and decomposed under the condition of thermal runaway, so that the safety risk of the lithium ion energy storage battery in the process of fire and explosion is great. In recent years, lithium ion energy storage batteries are frequently in fire accidents.
The safety problem of the lithium ion energy storage battery is attributed to thermal runaway of the lithium ion energy storage battery. Thermal runaway refers to an overheating phenomenon in which the temperature rise rate is rapidly changed due to a chain reaction inside a battery, and is a root cause for smoking, burning and explosion of the battery. At present, a lithium ion energy storage battery extinguishment device mainly adopts water mist and a heptafluoropropane battery cabin extinguishment device. The water mist fire extinguishing device for the battery compartment adopts water for fire extinguishing, water conducts electricity, and short circuit of equipment is caused when the water is released to the battery and electrical equipment. The heptafluoropropane fire extinguishing agent cannot be cooled, cannot inhibit thermal runaway of the battery, is difficult to extinguish the lithium ion battery fire, and has extremely low fire extinguishing speed. Therefore, the development of an efficient, safe and low-cost fire extinguishing method and system for a lithium battery energy storage system is urgently needed.
Disclosure of Invention
The invention mainly aims to provide a fire extinguishing device and method for a battery compartment, and aims to solve the technical problem that the fire extinguishing speed of the fire extinguishing device for the battery compartment in the prior art is low.
In order to achieve the above object, the battery module is accommodated in the battery compartment, and the fire extinguishing apparatus for the battery compartment provided by the invention comprises: the fire detection mechanism is arranged in the battery cabin and is close to the battery module; the air exhaust mechanism is arranged in the battery compartment and is used for exhausting the gas in the battery compartment; the liquid cooling fire suppression mechanism comprises a liquid cooling pipeline and a fire suppression nozzle arranged on the liquid cooling pipeline, the liquid cooling pipeline is tightly attached to the outer surface of the battery module, a liquid cooling fire suppression medium is contained in the liquid cooling pipeline, and the fire suppression nozzle is used for ejecting the liquid cooling fire suppression medium; the controller is electrically connected with the fire detection mechanism, the air exhaust mechanism and the fire suppression nozzle, the fire detection mechanism is configured to detect a fire occurrence signal and send the detected fire occurrence signal to the controller, and the controller is configured to control the synchronous opening of the air exhaust mechanism and the fire suppression nozzle according to the fire occurrence signal.
Optionally, the battery compartment fire extinguishing apparatus further includes: the temperature measuring module is used for acquiring the temperature in the battery compartment and is electrically connected with the controller, and the controller is configured to synchronously close the exhaust mechanism and the fire suppression nozzle when the temperature in the battery compartment is lower than the open fire temperature; the air cooling mechanism comprises an air cooling pipeline and a cooling nozzle installed on the air cooling pipeline, the cooling nozzle is arranged corresponding to the position of the battery module, the air cooling pipeline is used for allowing a cooling medium to enter the cooling nozzle, and the controller is configured to open the air cooling pipeline when the temperature in the battery compartment is lower than the open fire temperature and higher than the thermal runaway temperature and close the air cooling pipeline when the temperature in the battery compartment is lower than the thermal runaway temperature.
Optionally, the number of the air cooling pipelines is multiple, and the cooling nozzles and the air cooling pipelines are consistent in number and are arranged in one-to-one correspondence; the air cooling mechanism further comprises: the air-cooled storage is used for storing the cooling medium, and a freezing module for continuously cooling the cooling medium is arranged on the air-cooled storage; the opening valve is arranged on the air cooling main pipe, is electrically connected with the controller and is used for opening or closing the air cooling main pipe.
Optionally, the number of the liquid cooling pipelines is multiple, and the fire suppression nozzles and the liquid cooling pipelines are consistent in number and are arranged in a one-to-one correspondence manner; the liquid cooling presses down fire mechanism still includes: the liquid cooling memory is used for storing the liquid cooling fire suppression medium; the inlet of the liquid cooling pipeline is connected with the liquid cooling storage pipeline through the splitter; and the outlet of the liquid cooling pipeline is connected with the liquid cooling storage pipeline through the collector.
Optionally, the liquid cooling fire suppression mechanism further comprises a throttle valve electrically connected with the controller, the throttle valve is arranged on a pipeline between the shunt and the liquid cooling memory, and the controller is configured to control the opening degree of the throttle valve according to the temperature in the battery compartment.
Optionally, the temperature reducing medium is one or a combination of nitrogen, argon, helium and carbon dioxide.
Optionally, the fire detection mechanism includes one or more of a smoke sensing component, a temperature sensing component, a combustible gas detection component, and a pressure monitoring component.
Optionally, the liquid-cooled fire-suppression medium is perfluorobutyl methyl ether, perfluorobutyl ethyl ether, perfluorobutyl propyl ether, perfluoropropyl methyl ether, perfluoropropyl ethyl ether, perfluoroethyl methyl ether, perfluoroethyl butyl ether, perfluoromethyl butyl ether, perfluoropropyl butyl ether, perfluoromethyl amyl ether, perfluoromethyl ethyl ether, perfluoromethyl propyl ether, perfluoromethyl bromomethyl ether, 1-1-difluoromethyl bromomethyl ether, perfluoro-2-methylpentane-3-methoxyether, perfluoro-2-methylhexane-3-ethoxyether, perfluoro C6 cyclic ether, perfluoro C7 cyclic ether, perfluoro C8 cyclic ether, pentafluorobutene, hexafluorobutene, tetrafluorobutene, 2-bromotrifluoropropene, perfluorotripropylamine, perfluorotributylamine, perfluorotripentylamine, perfluorodimethylethylamine, perfluorodimethylethenylamine, or a combination of one or more thereof.
The invention also provides a fire extinguishing method for the battery compartment,
the fire extinguishing method for the battery compartment comprises the following steps:
the controller acquires whether a fire occurrence signal exists in the battery compartment;
under the condition that a fire signal exists in the battery compartment, starting an exhaust mechanism to exhaust gas in the battery compartment, and simultaneously starting a fire suppression nozzle to cool the battery compartment by a liquid cooling medium;
acquiring the temperature in the battery compartment;
under the condition that the temperature in the battery compartment is lower than the open fire temperature and higher than the thermal runaway temperature, closing the exhaust mechanism and the fire suppression nozzle, and controlling the air cooling pipeline to spray a cooling medium to the battery module;
closing the air cooling duct in the event that the temperature within the battery compartment is below the thermal runaway temperature.
Optionally, the usage amount of the cooling medium is obtained according to the following formula:
W＝K Q/Cp(T-T)；
wherein W is the dosage of the cooling medium; cpIs the specific heat capacity of the cooling medium; t is2A temperature at which thermal runaway occurs; t is1The temperature of the cooling medium; k is the cooling efficiency of the cooling medium; q1The heat generated by the fire in the unit time of the battery module.
According to the technical scheme, when the battery module in the battery compartment works, the liquid cooling fire suppression medium in the liquid cooling pipeline carries out continuous cooling and cooling on the battery module, the battery module can be guaranteed to be always below the open fire temperature, the use safety of the battery compartment is improved, meanwhile, the fire detection mechanism detects whether a fire occurrence signal exists in the battery compartment in real time, when the fire detection mechanism detects the fire occurrence signal, the controller controls the air exhaust mechanism to be opened, so that the air exhaust mechanism can exhaust combustible gas in the battery compartment, and the controller controls the fire suppression nozzle to be opened. The liquid cooling pipeline is tightly attached to the outer surface of the battery module, the liquid cooling fire suppression medium can be rapidly sprayed to the battery module from the fire suppression nozzle, after a fire disaster occurs, the spreading and the diffusion of open fire can be rapidly prevented, the fire disaster is controlled in a small scale range, and meanwhile, the liquid cooling fire suppression medium is combined with the discharge of combustible gas, so that the fire disaster can be more rapidly suppressed. The battery compartment fire extinguishing device continuously cools and cools the battery module through the liquid-cooling fire suppression mechanism, simultaneously performs air exhaust and liquid-cooling fire suppression medium cooling on the battery compartment synchronously by combining the air exhaust mechanism and the liquid-cooling fire suppression mechanism when detecting a fire occurrence signal, adopts a dual fire extinguishing mode combining oxygen isolation and cooling, can quickly suppress open fire and extinguish the fire, and improves the fire extinguishing efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of the assembly of a fire suppression device for a battery compartment according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a fire extinguishing method for a battery compartment according to an embodiment of the invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Fire extinguishing device for |
38 | Fire suppression selector valve |
| 1 | |
39 | |
| 2 | |
4 | |
| 3 | Liquid cooling |
5 | |
| 31 | |
6 | |
| 32 | |
61 | |
| 33 | Liquid-cooled |
62 | |
| 34 | |
63 | Air-cooled |
| 35 | |
64 | |
| 36 | |
65 | Air cooling |
| 37 | |
200 | Battery compartment |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
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.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a fire extinguishing device for a battery compartment.
As shown in fig. 1, in an embodiment of the present invention, the battery compartment fire extinguishing apparatus 100 includes a fire detection mechanism 1, an air exhaust mechanism 2, a liquid-cooled fire suppression mechanism 3, and a controller 4; the fire detection mechanism 1 is arranged in the battery compartment 200 and close to the battery module; the exhaust mechanism 2 is installed in the battery compartment 200 and is used for exhausting the gas in the battery compartment 200; the liquid cooling fire suppression mechanism 3 comprises a liquid cooling pipeline 31 and a fire suppression nozzle 32 arranged on the liquid cooling pipeline 31, wherein the liquid cooling pipeline 31 is tightly attached to the outer surface of the battery module, a liquid cooling fire suppression medium is contained in the liquid cooling pipeline 31, and the fire suppression nozzle 32 is used for ejecting the liquid cooling fire suppression medium; the fire detection mechanism 1, the exhaust mechanism 2 and the fire suppression nozzle 32 are all electrically connected with the controller 4, the fire detection mechanism 1 is configured to detect a fire occurrence signal and send the detected fire occurrence signal to the controller 4, the controller 4 is configured to control the synchronous opening of the exhaust mechanism 2 and the fire suppression nozzle 32 according to the fire occurrence signal, and the exhaust mechanism 2 in the embodiment can adopt an exhaust fan.
When the battery module in the battery compartment 200 of the embodiment works, the liquid cooling fire suppression medium in the liquid cooling pipeline 31 continuously cools and cools the battery module, the battery module can be ensured to be always below the open fire temperature, the use safety of the battery compartment 200 is improved, meanwhile, the fire detection mechanism 1 detects whether a fire occurrence signal exists in the battery compartment 200 in real time, when the fire detection mechanism 1 detects the fire occurrence signal, the controller 4 controls the exhaust mechanism 2 to be opened, so that the exhaust mechanism 2 can exhaust combustible gas in the battery compartment 200, and the controller 4 controls the fire suppression nozzle 32 to be opened. The liquid cooling pipe 31 is closely attached to the outer surface of the battery module, and the liquid cooling fire suppression medium can be rapidly sprayed to the battery module from the fire suppression nozzle 32, so that after a fire disaster occurs, the spreading and diffusion of open fire can be rapidly prevented, the fire disaster can be controlled within a small scale range, and meanwhile, the fire disaster can be more rapidly suppressed by combining with the discharge of combustible gas. When this embodiment battery compartment extinguishing device 100 presses down fire mechanism 3 through the liquid cooling and continuously cools down the battery module, combines exhaust mechanism 2 and liquid cooling to press down fire mechanism 3 when detecting conflagration emergence signal, and the medium cooling of suppressing fires is carried out to exhaust and liquid cooling in the battery compartment 200 in step, adopts the dual mode of putting out a fire that separates oxygen and cooling and combine together, can restrain the open fire fast and put out the conflagration, has improved fire extinguishing efficiency.
In one embodiment, the fire extinguishing apparatus 100 further includes a temperature measuring module 5 and an air-cooling mechanism 6; the temperature measuring module 5 is used for acquiring the temperature in the battery compartment 200, the temperature measuring module 5 is electrically connected with the controller 4, and the controller 4 is configured to synchronously close the air exhaust mechanism 2 and the fire suppression nozzle 32 when the temperature in the battery compartment 200 is lower than the open fire temperature; the air cooling mechanism 6 includes an air cooling duct 61 and a cooling nozzle 62 installed on the air cooling duct 61, the cooling nozzle 62 is disposed at a position corresponding to the battery module, the air cooling duct 61 is used for allowing a cooling medium to enter the cooling nozzle 62, the controller 4 is configured to open the air cooling duct 61 when the temperature in the battery compartment 200 is lower than the naked flame temperature and higher than the thermal runaway temperature, and close the air cooling duct 61 when the temperature in the battery compartment 200 is lower than the thermal runaway temperature, the cooling medium in this embodiment is a low temperature inert gas, which can dilute the combustible gas in the battery compartment 200 and play a role of explosion suppression, and meanwhile, the cleanness is good and the environment is not polluted.
After the fire detection mechanism 1 detects that a fire occurrence signal exists in the battery compartment 200, the exhaust mechanism 2 and the liquid cooling fire suppression mechanism 3 firstly quickly suppress the fire to prevent the fire from spreading, meanwhile, the temperature measurement module 5 starts to detect the temperature in the battery compartment 200 in real time, and synchronously closes the exhaust mechanism 2 and the fire suppression nozzle 32 when the temperature in the battery compartment 200 is lower than the naked fire temperature and higher than the thermal runaway temperature, the air cooling pipeline 61 is opened when the temperature in the battery compartment 200 is lower than the naked fire temperature and higher than the thermal runaway temperature, the battery module is continuously cooled by using a cooling medium, the air cooling pipeline 61 is closed when the temperature in the battery compartment 200 is lower than the thermal runaway temperature, the temperature measurement module 5 continuously detects the temperature in the battery compartment 200 in real time, the air cooling pipeline 61 is opened when the temperature in the battery compartment 200 is lower than the naked fire temperature and higher than the thermal runaway temperature, the cooling medium forms a circulating pulse type to continuously release until the heat generated by the thermal runaway of the battery module is completely absorbed by the cooling medium, the thermal runaway reaction is terminated. In the embodiment, through the cooperation of the exhaust mechanism 2, the liquid-cooling fire suppression mechanism 3 and the air-cooling temperature reduction mechanism 6, the thermal runaway of the battery module after the open fire is extinguished can be inhibited, the re-ignition of the fire can be prevented, and the fire extinguishing safety of the battery compartment 200 is improved.
In another embodiment, in order to further increase the fire extinguishing speed, after the fire detection mechanism 1 detects that a fire occurrence signal exists in the battery compartment 200, the controller 4 synchronously opens the exhaust mechanism 2, the fire suppression nozzle 32 and the air cooling pipeline 61, rapidly extinguishes the fire by adopting a triple fire extinguishing mode of exhaust and liquid cooling combined with air cooling, closes the exhaust mechanism 2 and the fire suppression nozzle 32 when the temperature in the battery compartment 200 is lower than the open fire temperature, and only adopts the circulating pulse type cooling medium continuously released to suppress thermal runaway until the heat of the thermal runaway of the battery module is completely absorbed by the cooling medium.
In this embodiment, the number of the air cooling pipes 61 is plural, and the cooling nozzles 62 and the air cooling pipes 61 are consistent in number and are arranged in one-to-one correspondence; the air cooling mechanism 6 further includes: the air-cooled storage 63 is used for storing a cooling medium, and a freezing module for continuously cooling the cooling medium is arranged on the air-cooled storage 63; the opening valve 64, the plurality of air-cooled pipes 61 are connected to the air-cooled storage 63 through the air-cooled main pipe 65, the opening valve 64 is installed in the air-cooled main pipe 65, the opening valve 64 is electrically connected to the controller 4, and the opening valve 64 opens or closes the air-cooled main pipe 65. The storage temperature of the air-cooled storage 63 for the cooling medium is-50 ℃ to 0 ℃, and the cooling medium can be stably stored for a long time, so that the cooling medium is prevented from deteriorating. The air-cooled storage 63 supplies cooling medium to the plurality of air-cooled pipelines 61 through the air-cooled main pipe 65, so that the plurality of cooling nozzles 62 simultaneously restrain thermal runaway of the battery module, termination of thermal runaway of the battery module can be accelerated, and fire extinguishing speed can be further increased.
In the battery compartment fire extinguishing apparatus 100 of the embodiment, the number of the liquid cooling pipes 31 is plural, and the fire suppression nozzles 32 and the liquid cooling pipes 31 are consistent in number and are arranged in one-to-one correspondence; the liquid-cooled fire suppression mechanism 3 further includes a liquid-cooled storage 33, a shunt 34, and a collector 35; the liquid-cooled storage 33 is used for storing a liquid-cooled fire suppression medium; the inlet of the liquid cooling pipe 31 is connected with the liquid cooling storage 33 through a flow divider 34; the outlet of the liquid-cooled conduit 31 is piped to a liquid-cooled storage 33 via a collector 35. As shown in fig. 1, the liquid-cooled fire suppression mechanism 3 in the present embodiment further includes a compressor 37 and a condenser 39, the compressor 37 is installed on the pipe between the collector 35 and the liquid-cooled storage device 33, the condenser 39 is installed on the pipe between the liquid-cooled storage device 33 and the compressor 37, and when the battery module in 200 is in normal operation, the liquid cooling fire suppression medium in the liquid cooling pipeline 31 is used for continuously cooling the battery module, at the moment, the liquid cooling fire suppression medium enters the liquid cooling pipeline 31 through the liquid cooling memory 33 and the shunt 34 in sequence, and flows back to the liquid cooling storage 33 from the liquid cooling pipeline 31 through the collector 35, the compressor 37 and the condenser 39 in sequence, the flow divider 34 can ensure the balance of the liquid cooling fire suppression medium in each liquid cooling pipeline 31, the situation that the fire cannot be extinguished locally can be avoided, and the liquid collector 35 and the compressor 37 can enable the liquid cooling fire suppression medium to flow back quickly, so that the circulating cooling efficiency of the liquid cooling fire suppression medium is ensured.
As shown in fig. 1, the liquid-cooled fire suppression mechanism 3 further includes a throttle valve 36 electrically connected to the controller 4, the throttle valve 36 being disposed on the pipe between the shunt 34 and the liquid-cooled storage 33, the controller 4 being configured to control the opening degree of the throttle valve 36 in accordance with the temperature inside the battery compartment 200. When the temperature in the battery compartment 200 is higher than the open fire temperature and the temperature in the battery compartment 200 is at a higher level, the controller 4 increases the opening of the throttle valve 36 to increase the amount of the liquid-cooled fire suppression medium to be sprayed, and when the temperature in the battery compartment 200 is higher than the open fire temperature and the temperature in the battery compartment 200 is at a lower level, the controller 4 decreases the opening of the throttle valve 36 to decrease the amount of the liquid-cooled fire suppression medium to be sprayed, thereby avoiding unnecessary spraying of the liquid-cooled fire suppression medium.
In one embodiment, a fire suppression selection valve 38 is installed on each liquid cooling pipeline 31, and the liquid cooling fire suppression medium can be shut down by manually closing the fire suppression selection valve 38, so as to facilitate the operation and control of the battery compartment fire extinguishing apparatus 100 by an operator.
In this embodiment, the cooling medium is one or a combination of nitrogen, argon, helium, and carbon dioxide. The gas is used as a cooling medium, so that the material is convenient to obtain, the inertia is strong, the cost is low compared with the gas extinguishing agents such as heptafluoropropane in the prior art, and the economy is good. The fire detection mechanism 1 comprises one or more of a smoke sensing component, a temperature sensing component, a combustible gas detection component and a pressure monitoring component. Can accurate perception battery compartment 200's conflagration emergence signal, the accuracy nature of putting out a fire of battery compartment extinguishing device 100 has been improved, and fire detection mechanism 1 in this embodiment is close to the battery module setting, when being provided with a plurality of battery modules in battery compartment 200, fire detection mechanism 1, the liquid cooling presses down fire mechanism 3 and air cooling mechanism 6 quantity and all unanimous and the one-to-one setting with the quantity of battery module, when fire detection mechanism 1 detects the battery module that rather than corresponding and takes place the conflagration, controller 4 control liquid cooling that corresponds presses down fire mechanism 3 air cooling mechanism 6 and carries out corresponding fire extinguishing operation.
In this embodiment, the liquid-cooled fire-suppressing medium is perfluorobutyl methyl ether, perfluorobutyl ethyl ether, perfluorobutyl propyl ether, perfluoropropyl methyl ether, perfluoropropyl ethyl ether, perfluoroethyl methyl ether, perfluoroethyl butyl ether, perfluoromethyl butyl ether, perfluoropropyl butyl ether, perfluoromethyl amyl ether, perfluoromethyl ethyl ether, perfluoromethyl propyl ether, perfluoromethyl bromomethyl ether, 1-1-difluoromethyl bromomethyl ether, perfluoro-2-methylpentane-3-methoxyether, perfluoro-2-methylhexane-3-ethoxyether, perfluoro C6 cyclic ether, perfluoro C7 cyclic ether, perfluoro C8 cyclic ether, pentafluorobutene, hexafluorobutene, tetrafluorobutene, 2-bromotrifluoropropene, perfluorotripropylamine, perfluorotributylamine, perfluorotripentylamine, perfluorodimethylethylamine, perfluorodimethylethenylamine, or a combination of one or more thereof. By adopting the liquid-cooled fire suppression medium, the situation of short circuit of equipment caused by the conduction of the liquid-cooled fire suppression medium can be avoided, and the fire extinguishing safety of the battery compartment fire extinguishing device 100 is improved.
As shown in fig. 2, the present invention further provides a fire extinguishing method for a battery compartment, in a first embodiment of the fire extinguishing method for a battery compartment provided by the present invention, the fire extinguishing method for a battery compartment includes the following specific steps:
step S10, the controller acquires whether a fire signal exists in the battery compartment;
step S20, under the condition that a fire signal exists in the battery compartment, starting an exhaust mechanism to exhaust gas in the battery compartment, and simultaneously starting a fire suppression nozzle to cool the battery compartment by a liquid cooling medium;
step S30, acquiring the temperature in the battery compartment;
step S40, under the condition that the temperature in the battery compartment is lower than the open fire temperature and higher than the thermal runaway temperature, closing the exhaust mechanism and the fire suppression nozzle, and controlling the air cooling pipeline to spray a cooling medium to the battery module;
and step S50, closing the air cooling pipeline when the temperature in the battery compartment is lower than the thermal runaway temperature.
In the embodiment, under the condition that the controller acquires a fire occurrence signal in real time, the exhaust mechanism and the fire suppression nozzle are opened, and the open fire is extinguished in the early stage by adopting a mode of combining exhaust with liquid cooling, so that the fire is prevented from spreading; meanwhile, the controller acquires the temperature in the battery compartment in real time, the air exhaust mechanism and the fire suppression nozzle are closed under the condition that the temperature in the battery compartment is lower than the open fire temperature, the air cooling pipeline is opened, the air cooling pipeline is closed under the condition that the temperature in the battery compartment is lower than the thermal runaway temperature, the cooling medium is adopted to carry out circulating pulse type cooling on the battery module, and the condition that the battery module is subjected to thermal runaway again and fire re-ignition is avoided.
In another embodiment, the controller acquires a signal that no fire occurs, and controls the liquid cooling medium to circularly cool the battery module, so that the normal working temperature of the battery module is ensured, and thermal runaway of the battery module is avoided.
Further, according to the first embodiment of the fire extinguishing method for the battery compartment provided by the invention, the second embodiment of the fire extinguishing method for the battery compartment is provided, and the usage amount of the cooling medium is obtained according to the following formula:
W＝K Q1/Cp T2-T1)；
wherein W is the dosage of the cooling medium; cpIs the specific heat capacity of the cooling medium; t is2A temperature at which thermal runaway occurs; t is1The temperature of the cooling medium; k is the cooling efficiency of the cooling medium; q1The heat generated by the fire in the unit time of the battery module.
In one embodiment, T2Is 100 degrees, T1At-15 ℃, the cooling efficiency K of the cooling medium is 1.2, Q1The heat generated by the fire in the unit time of the battery module. Calculated as W1.2 × 1.1 GJ/(0.840 KJ/(Kg ℃) x (100+15)) -13665 Kg. Through above formula, the controller can accurate control cooling medium's emission, avoids the not enough or excessive condition of cooling, combines cooling medium's specific heat capacity, cooling medium's temperature and cooling efficiency control cooling medium's quantity simultaneously, can realize the accurate control of the different eruption volumes of different cooling media, can effectively realize the suppression of thermal runaway.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A battery compartment extinguishing apparatus, a battery module has been put in battery compartment (200), its characterized in that, battery compartment extinguishing apparatus (100) includes:
the fire detection mechanism (1) is arranged in the battery compartment (200) and is close to the battery module;
the air exhaust mechanism (2) is arranged in the battery compartment (200) and is used for exhausting the gas in the battery compartment (200);
the liquid cooling fire suppression mechanism (3) comprises a liquid cooling pipeline (31) and a fire suppression nozzle (32) arranged on the liquid cooling pipeline (31), the liquid cooling pipeline (31) is tightly attached to the outer surface of the battery module, liquid cooling fire suppression media are contained in the liquid cooling pipeline (31), and the fire suppression nozzle (32) is used for ejecting the liquid cooling fire suppression media;
the controller (4), the fire detection mechanism (1), the air exhaust mechanism (2) and the fire suppression nozzle (32) are all electrically connected with the controller (4), the fire detection mechanism (1) is configured to detect a fire occurrence signal and send the detected fire occurrence signal to the controller (4), and the controller (4) is configured to control the synchronous opening of the air exhaust mechanism (2) and the fire suppression nozzle (32) according to the fire occurrence signal.
2. The battery compartment fire suppression apparatus according to claim 1, wherein the battery compartment fire suppression apparatus (100) further comprises:
the temperature measuring module (5) is used for acquiring the temperature in the battery compartment (200), the temperature measuring module (5) is electrically connected with the controller (4), and the controller (4) is configured to synchronously close the air exhaust mechanism (2) and the fire suppression nozzle (32) when the temperature in the battery compartment (200) is lower than the open fire temperature;
the air cooling mechanism (6) comprises an air cooling pipeline (61) and a cooling nozzle (62) installed on the air cooling pipeline (61), the cooling nozzle (62) is arranged corresponding to the position of the battery module, the air cooling pipeline (61) is used for allowing a cooling medium to enter the cooling nozzle (62), and the controller (4) is configured to open the air cooling pipeline (61) when the temperature in the battery compartment (200) is lower than the open fire temperature and higher than the thermal runaway temperature, and close the air cooling pipeline (61) when the temperature in the battery compartment (200) is lower than the thermal runaway temperature.
3. The fire extinguishing apparatus for a battery compartment according to claim 2, wherein the number of the air-cooling ducts (61) is plural, and the number of the temperature-reducing nozzles (62) and the number of the air-cooling ducts (61) are identical and are arranged in one-to-one correspondence;
the air cooling mechanism (6) further comprises:
the air-cooled storage (63) is used for storing the cooling medium, and a freezing module used for continuously cooling the cooling medium is arranged on the air-cooled storage (63);
an opening valve (64), a plurality of the air-cooling ducts (61) being connected to the air-cooling storage (63) through an air-cooling main pipe (65), the opening valve (64) being installed to the air-cooling main pipe (65), the opening valve (64) being electrically connected to the controller (4) and the opening valve (64) being used to open or close the air-cooling main pipe (65).
4. The battery compartment fire extinguishing apparatus according to claim 2, wherein the number of the liquid cooling pipes (31) is plural, and the fire suppression nozzles (32) and the liquid cooling pipes (31) are in the same number and are arranged in one-to-one correspondence;
liquid cooling presses down fire mechanism (3) still includes:
a liquid-cooled storage (33) for storing the liquid-cooled fire suppression medium;
a flow divider (34) through which an inlet of the liquid-cooled conduit (31) is conduit connected to the liquid-cooled storage (33);
a collector (35), the outlet of the liquid cooling conduit (31) being in conduit connection with the liquid cooling storage (33) through the collector (35).
5. The battery compartment fire suppression apparatus according to claim 4, wherein the liquid-cooled fire suppression mechanism (3) further comprises a throttle valve (36) electrically connected to the controller (4), the throttle valve (36) being disposed on a pipe between the flow divider (34) and the liquid-cooled storage (33), the controller (4) being configured to control an opening degree of the throttle valve (36) according to a temperature inside the battery compartment (200).
6. The fire suppression apparatus of claim 2, wherein the temperature reducing medium is a combination of one or more of nitrogen, argon, helium, and carbon dioxide.
7. The battery compartment fire extinguishing apparatus according to any one of claims 1 to 6, wherein the fire detection mechanism (1) comprises a combination of one or more of a smoke sensing component, a temperature sensing component, a combustible gas detection component, a pressure monitoring component.
8. The fire extinguishing apparatus for battery compartments as defined in any one of claims 1 to 6, wherein the liquid-cooled fire-suppressing medium is perfluorobutyl methyl ether, perfluorobutyl ethyl ether, perfluorobutyl propyl ether, perfluoropropyl methyl ether, perfluoropropyl ethyl ether, perfluoroethyl methyl ether, perfluoroethyl butyl ether, perfluoromethyl butyl ether, perfluoropropyl butyl ether, perfluoromethyl pentyl ether, perfluoromethyl ethyl ether, perfluoromethyl propyl ether, perfluoromethyl bromomethyl ether, 1-1-difluoromethyl bromomethyl ether, perfluoro-2-methylpentane-3-methoxy ether, perfluoro-2-methylhexane-3-ethoxy ether, perfluoro C6 cyclic ether, perfluoro C7 cyclic ether, perfluoro C8 cyclic ether, pentafluorobutene, hexafluorobutene, tetrafluorobutene, 2-bromotrifluoropropene, perfluorotripropylamine, perfluorotributylamine, perfluorotripentylamine, Perfluorodimethylethylamine, perfluorodimethylethyleneamine, or a combination of one or more thereof.
9. A fire extinguishing method for a battery compartment is characterized by comprising the following steps:
the controller acquires whether a fire occurrence signal exists in the battery compartment;
under the condition that a fire signal exists in the battery compartment, starting an exhaust mechanism to exhaust gas in the battery compartment, and simultaneously starting a fire suppression nozzle to cool the battery compartment by a liquid cooling medium;
acquiring the temperature in the battery compartment;
under the condition that the temperature in the battery compartment is lower than the open fire temperature and higher than the thermal runaway temperature, closing the exhaust mechanism and the fire suppression nozzle, and controlling the air cooling pipeline to spray a cooling medium to the battery module;
closing the air cooling duct in the event that the temperature within the battery compartment is below the thermal runaway temperature.
10. The fire extinguishing method for a battery compartment according to claim 9, wherein the amount of the cooling medium is obtained according to the following formula:
W＝K Q1/(Cp(T2-T1))；
wherein W is the dosage of the cooling medium; cpIs the specific heat capacity of the cooling medium; t is2A temperature at which thermal runaway occurs; t is1The temperature of the cooling medium; k is the cooling efficiency of the cooling medium; q1The heat generated by the fire in the unit time of the battery module.
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Application publication date: 20211224 |
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| RJ01 | Rejection of invention patent application after publication |