CN117919632B - Cooling fire extinguishing explosion suppression injection system and method for energy storage power station - Google Patents
Cooling fire extinguishing explosion suppression injection system and method for energy storage power station Download PDFInfo
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- CN117919632B CN117919632B CN202410342075.1A CN202410342075A CN117919632B CN 117919632 B CN117919632 B CN 117919632B CN 202410342075 A CN202410342075 A CN 202410342075A CN 117919632 B CN117919632 B CN 117919632B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 164
- 238000001816 cooling Methods 0.000 title claims abstract description 79
- 238000004880 explosion Methods 0.000 title claims abstract description 51
- 230000001629 suppression Effects 0.000 title claims abstract description 26
- 238000002347 injection Methods 0.000 title claims abstract description 24
- 239000007924 injection Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 61
- 238000001514 detection method Methods 0.000 claims abstract description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 334
- 239000007788 liquid Substances 0.000 claims description 192
- 229910052757 nitrogen Inorganic materials 0.000 claims description 153
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 149
- 239000001301 oxygen Substances 0.000 claims description 149
- 229910052760 oxygen Inorganic materials 0.000 claims description 149
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 94
- 238000005507 spraying Methods 0.000 claims description 52
- 239000001569 carbon dioxide Substances 0.000 claims description 47
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 47
- 239000007921 spray Substances 0.000 claims description 34
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 28
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 15
- 229910052739 hydrogen Inorganic materials 0.000 claims description 15
- 238000001931 thermography Methods 0.000 claims description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 13
- 239000001257 hydrogen Substances 0.000 claims description 13
- 239000000779 smoke Substances 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 12
- 238000013021 overheating Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910001868 water Inorganic materials 0.000 claims description 8
- 150000002431 hydrogen Chemical class 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 230000005764 inhibitory process Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 230000007480 spreading Effects 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 description 18
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
-
- 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
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention discloses a cooling fire extinguishing explosion suppression injection system and a cooling fire extinguishing explosion suppression injection method for an energy storage power station, wherein the cooling fire extinguishing explosion suppression injection system comprises the following steps: the system comprises a detection mechanism, a main controller and a cooling and fire extinguishing mechanism; the detection mechanism comprises an infrared thermal imager which is arranged in the energy storage shelter and is positioned outside the battery box, and a detection assembly which is arranged in each battery box; the detection component and the infrared thermal imager are respectively and electrically connected with the main controller; the cooling fire extinguishing mechanism is electrically connected with the main controller. According to the invention, when a certain battery box is in a battery overheat state, the surface of the battery in the battery box can be cooled in advance, so that the battery is ensured to be in a safe and comfortable temperature interval; and when a certain battery box is in a thermal runaway state, the thermal runaway is restrained so as to rapidly control the fire and prevent the fire from spreading. The invention greatly improves the safety of the energy storage power station.
Description
Technical Field
The invention relates to the technical field of energy storage power stations, in particular to a cooling fire extinguishing explosion suppression injection system and method for an energy storage power station.
Background
The energy storage mode of the lithium ion batteries mainly comprises the step of intensively placing a large number of lithium ion batteries in the form of energy storage PACK/cluster/shelter. The lithium ion battery is an energy-containing substance (lithium iron phosphate and ternary lithium ion battery), the temperature is suddenly increased after thermal runaway, fire is extremely easy to occur, and because the internal continuous short circuit occurs, the condition of continuous high temperature can occur before the energy is completely released, so that the fire is extremely easy to burn back, and the fire of the lithium ion battery energy storage cabinet has the characteristics of easy occurrence, high occurrence speed, high spreading speed, easy explosion, easy reburning and the like. After the energy storage battery PACK/cluster is placed in a cluster, the energy density is high, the energy is high, and the energy released by fire or explosion is high. Once a fire occurs, huge losses are easily caused to social security and life and property security. Therefore, a cooling fire-extinguishing explosion-suppressing injection system for an energy storage power station is needed to discover abnormality in advance and perform intervention in time, so that fire is rapidly controlled, fire spread is prevented, explosion is effectively suppressed, and explosion is prevented.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a cooling fire-extinguishing explosion-suppression injection system and a cooling fire-extinguishing explosion-suppression injection method for an energy storage power station.
The invention provides a cooling fire-extinguishing explosion-suppression injection system for an energy storage power station, which comprises an energy storage shelter and a plurality of battery boxes arranged in the energy storage shelter, and comprises the following components: the system comprises a detection mechanism, a main controller and a cooling and fire extinguishing mechanism;
The detection mechanism comprises an infrared thermal imager which is arranged in the energy storage shelter and is positioned outside the battery box, and a detection assembly which is arranged in each battery box; the detection assembly comprises a hydrogen sensor, a smoke sensor, a carbon monoxide sensor, a temperature sensor and a VOC sensor, wherein the smoke sensor, the temperature sensor, the VOC sensor, the carbon monoxide sensor, the hydrogen sensor and the infrared thermal imager are respectively and electrically connected with the main controller;
The cooling and fire extinguishing mechanism comprises a driving gas cylinder, a low-pressure liquid nitrogen storage bottle and a spraying assembly for spraying into each battery box; the driving gas cylinder is connected with the low-pressure liquid nitrogen storage bottle, the low-pressure liquid nitrogen storage bottle is connected with the spraying assembly, and a first electromagnetic valve is connected between the low-pressure liquid nitrogen storage bottle and the spraying assembly; the driving gas cylinder, the low-pressure liquid nitrogen storage bottle, the first electromagnetic valve and the spraying assembly are respectively and electrically connected with the main controller;
the main controller is used for judging the real-time state of each battery box according to the real-time state parameters of each battery box and the infrared thermal imaging image; wherein, the real-time state includes: cell overheating and thermal runaway;
When the main controller judges that a certain battery box is in a battery overheat state, the main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box for cooling;
when the main controller judges that a certain battery box is in a thermal runaway state, the main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box for thermal runaway inhibition.
Preferably, the detection mechanism further comprises an oxygen sensor which is arranged in the energy storage shelter and is positioned outside the battery box, and the oxygen sensor is electrically connected with the main controller; the spraying assembly is also used for spraying into the energy storage shelter;
when the main controller judges that a certain battery box is in a thermal runaway state, the main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box until the open fire is extinguished;
when the open fire is extinguished, the main controller acquires the oxygen concentration in the energy storage shelter in real time by using the oxygen sensor;
the main controller is also used for judging whether the energy storage shelter has explosion risk according to the oxygen concentration in the energy storage shelter and a preset first oxygen concentration standard value;
When the oxygen concentration in the energy storage shelter is greater than or equal to a preset first oxygen concentration standard value, the main controller is also used for judging that the energy storage shelter has explosion risk;
if the main controller judges that the energy storage shelter has explosion risk, the main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the energy storage shelter until the oxygen concentration in the energy storage shelter is lower than a preset second oxygen concentration standard value; wherein the second oxygen concentration standard value is smaller than the first oxygen concentration standard value;
if the main controller judges that the energy storage shelter does not have explosion risk, the main controller is further used for controlling the cooling fire extinguishing mechanism to stop spraying low-temperature liquid nitrogen into the battery box.
Preferably, after the main controller controls the cooling fire extinguishing mechanism to stop spraying low-temperature liquid nitrogen into the battery box, the main controller also acquires the oxygen concentration in the energy storage shelter in real time by using the oxygen sensor;
When the oxygen concentration in the energy storage shelter is higher than a preset second oxygen concentration standard value, the main controller is further used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the energy storage shelter until the oxygen concentration in the energy storage shelter is lower than the preset second oxygen concentration standard value.
Preferably, a liquid level sensor is arranged in the low-pressure liquid nitrogen storage bottle, the cooling and fire extinguishing mechanism further comprises a high-pressure carbon dioxide bottle, the high-pressure carbon dioxide bottle is communicated with the spraying assembly, a second electromagnetic valve is connected between the high-pressure carbon dioxide bottle and the spraying assembly, and the liquid level sensor, the high-pressure carbon dioxide bottle and the second electromagnetic valve are respectively and electrically connected with the main controller;
the main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen and carbon dioxide into the battery box or the energy storage shelter at the same time when the liquid level in the low-pressure liquid nitrogen storage bottle is lower than a preset liquid level standard value;
the temperature-reducing fire-extinguishing mechanism further comprises a nitrogen-making module and a refrigerator, wherein the nitrogen-making module is connected with the low-pressure liquid nitrogen storage bottle, the refrigerator is arranged on the low-pressure liquid nitrogen storage bottle, and the nitrogen-making module and the refrigerator are respectively connected with the main controller;
When the liquid level in the low-pressure liquid nitrogen storage bottle is lower than a preset liquid level standard value, the main controller is further used for controlling the nitrogen making module to supplement nitrogen into the low-pressure liquid nitrogen storage bottle and controlling the refrigerator to convert gaseous nitrogen in the low-pressure liquid nitrogen storage bottle into liquid nitrogen.
Preferably, the spraying assembly is further provided with a municipal fire-fighting interface for connecting municipal fire-fighting, and the municipal fire-fighting interface is connected with a stop valve;
When the main controller judges that a certain battery box is in a thermal runaway state, the main controller also acquires the oxygen concentration in the energy storage shelter in real time by using the oxygen sensor;
The main controller is also used for judging whether the thermal runaway fire equivalent exceeds the protection range of liquid nitrogen and carbon dioxide according to the oxygen concentration in the energy storage shelter and a preset third oxygen concentration standard value; wherein the third oxygen concentration standard value is greater than the first oxygen concentration standard value;
When the oxygen concentration in the energy storage shelter is greater than or equal to a preset third oxygen concentration standard value, the main controller judges that the thermal runaway fire disaster equivalent exceeds the protection range of liquid nitrogen and carbon dioxide;
If the main controller judges that the equivalent of the thermal runaway fire exceeds the protection range of liquid nitrogen and carbon dioxide, the main controller controls the cooling fire extinguishing mechanism to spray water into the battery box until the open fire is extinguished;
If the main controller judges that the equivalent of the thermal runaway fire disaster does not exceed the protection range of the liquid nitrogen and the carbon dioxide, the main controller controls the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box.
The invention also provides a cooling fire-extinguishing explosion-suppression spraying method for the energy storage power station, which comprises the following steps:
acquiring real-time state parameters and infrared thermal imaging images in each battery box in the energy storage shelter in real time; wherein the real-time status parameters include temperature, hydrogen concentration, carbon monoxide concentration, smoke concentration, and VOC concentration;
Judging the real-time state of each battery box according to the real-time state parameters of each battery box and the infrared thermal imaging image; wherein, the real-time state includes: cell overheating and thermal runaway;
When a certain battery box is in a battery overheat state, spraying low-temperature liquid nitrogen into the battery box for cooling;
when a certain battery box is in a thermal runaway state, low-temperature liquid nitrogen is sprayed into the battery box to inhibit thermal runaway.
Preferably, when a certain battery box is in a thermal runaway state, injecting low-temperature liquid nitrogen into the battery box for thermal runaway inhibition, specifically comprising:
when a certain battery box is in a thermal runaway state, spraying low-temperature liquid nitrogen into the battery box until an open fire is extinguished;
when the open fire is extinguished, acquiring the oxygen concentration in the energy storage shelter in real time;
judging whether the energy storage shelter has explosion risk or not according to the oxygen concentration in the energy storage shelter and a preset first oxygen concentration standard value;
When the oxygen concentration in the energy storage shelter is larger than or equal to a preset first oxygen concentration standard value, judging that the energy storage shelter has explosion risk;
If the energy storage shelter is judged to have explosion risk, low-temperature liquid nitrogen is sprayed into the energy storage shelter until the oxygen concentration in the energy storage shelter is lower than a preset second oxygen concentration standard value; wherein the second oxygen concentration standard value is smaller than the first oxygen concentration standard value;
and if the energy storage shelter is judged not to have explosion risk, stopping spraying low-temperature liquid nitrogen into the battery box.
Preferably, after stopping the injection of the low-temperature liquid nitrogen into the battery box, the method further comprises:
Continuously acquiring the oxygen concentration in the energy storage shelter in real time;
and when the oxygen concentration in the energy storage shelter is higher than a preset second oxygen concentration standard value, injecting low-temperature liquid nitrogen into the energy storage shelter until the oxygen concentration in the energy storage shelter is lower than the preset second oxygen concentration standard value.
Preferably, in the process of injecting low-temperature liquid nitrogen into the battery box or the energy storage shelter, if the liquid level of the liquid nitrogen is lower than a preset liquid level standard value, injecting the low-temperature liquid nitrogen and carbon dioxide into the battery box or the energy storage shelter at the same time;
when the liquid level in the low-pressure liquid nitrogen storage bottle is lower than a preset liquid level standard value, supplementing gaseous nitrogen into the low-pressure liquid nitrogen storage bottle, and converting the gaseous nitrogen in the low-pressure liquid nitrogen storage bottle into liquid nitrogen.
Preferably, before injecting the low-temperature liquid nitrogen into a certain battery box when the battery box is in a thermal runaway state, the method further comprises:
Acquiring the oxygen concentration in the energy storage shelter in real time;
Judging whether the thermal runaway fire equivalent exceeds the protection range of liquid nitrogen and carbon dioxide according to the oxygen concentration in the energy storage shelter and a preset third oxygen concentration standard value; wherein the third oxygen concentration standard value is greater than the first oxygen concentration standard value;
When the oxygen concentration in the energy storage shelter is greater than or equal to a preset third oxygen concentration standard value, judging that the thermal runaway fire disaster equivalent exceeds the protection range of liquid nitrogen and carbon dioxide;
If the equivalent of the thermal runaway fire exceeds the protection range of liquid nitrogen and carbon dioxide, water is sprayed into the energy storage shelter until the open fire is extinguished;
And if the equivalent of the thermal runaway fire is judged not to exceed the protection range of the liquid nitrogen and the carbon dioxide, spraying low-temperature liquid nitrogen into the battery box.
According to the cooling fire extinguishing explosion suppression spraying system and method for the energy storage power station, the main controller is used for acquiring real-time state parameters and infrared thermal imaging images in each battery box in the energy storage shelter in real time by using the detection mechanism; wherein the real-time status parameters include temperature, hydrogen concentration, carbon monoxide concentration, smoke concentration, and VOC concentration; then, the main controller judges the real-time state of each battery box according to the real-time state parameters of each battery box and the infrared thermal imaging image; wherein, the real-time state includes: cell overheating and thermal runaway; when the main controller judges that a certain battery box is in a battery overheat state, the main controller controls the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box for cooling, so that the surface of the battery in the battery box is cooled in advance, and the battery is ensured to be in a safe and comfortable temperature interval; when the main controller judges that a certain battery box is in a thermal runaway state, the main controller controls the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box for thermal runaway inhibition so as to rapidly control fire and prevent fire from spreading. The invention greatly improves the safety of the energy storage power station.
Drawings
Fig. 1 is a block diagram of a cooling fire suppression and explosion suppression injection system for an energy storage power station in accordance with an embodiment of the present invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1, the cooling fire-extinguishing explosion-suppressing injection system for an energy storage power station provided by the invention comprises an energy storage shelter and a plurality of battery boxes installed in the energy storage shelter, and the cooling fire-extinguishing explosion-suppressing injection system comprises: the system comprises a detection mechanism, a main controller and a cooling and fire extinguishing mechanism;
The detection mechanism comprises an infrared thermal imager which is arranged in the energy storage shelter and is positioned outside the battery box, and a detection assembly which is arranged in each battery box; the detection assembly comprises a hydrogen sensor, a smoke sensor, a carbon monoxide sensor, a temperature sensor and a VOC sensor, wherein the smoke sensor, the temperature sensor, the VOC sensor, the carbon monoxide sensor, the hydrogen sensor and the infrared thermal imager are respectively and electrically connected with the main controller;
The cooling and fire extinguishing mechanism comprises a driving gas cylinder, a low-pressure liquid nitrogen storage bottle and a spraying assembly for spraying into each battery box; the driving gas cylinder is connected with the low-pressure liquid nitrogen storage bottle, the low-pressure liquid nitrogen storage bottle is connected with the spraying assembly, and a first electromagnetic valve is connected between the low-pressure liquid nitrogen storage bottle and the spraying assembly; the driving gas cylinder, the low-pressure liquid nitrogen storage bottle, the first electromagnetic valve and the spraying assembly are respectively and electrically connected with the main controller;
the main controller is used for judging the real-time state of each battery box according to the real-time state parameters of each battery box and the infrared thermal imaging image; wherein, the real-time state includes: cell overheating and thermal runaway;
When the main controller judges that a certain battery box is in a battery overheat state, the main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box for cooling;
when the main controller judges that a certain battery box is in a thermal runaway state, the main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box for thermal runaway inhibition.
The main controller acquires real-time state parameters and infrared thermal imaging images in each battery box in the energy storage shelter in real time through the detection mechanism; wherein the real-time status parameters include temperature, hydrogen concentration, carbon monoxide concentration, smoke concentration, and VOC concentration; then, the main controller judges the real-time state of each battery box according to the real-time state parameters of each battery box and the infrared thermal imaging image; wherein, the real-time state includes: cell overheating and thermal runaway; when the main controller judges that a certain battery box is in a battery overheat state, the main controller controls the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box for cooling, so that the surface of the battery in the battery box is cooled in advance, and the battery is ensured to be in a safe and comfortable temperature interval; when the main controller judges that a certain battery box is in a thermal runaway state, the main controller controls the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box for thermal runaway inhibition so as to rapidly control fire and prevent fire from spreading. The invention greatly improves the safety of the energy storage power station.
In the embodiment, the detection mechanism further comprises an oxygen sensor which is arranged in the energy storage shelter and positioned outside the battery box, and the oxygen sensor is electrically connected with the main controller;
when the main controller judges that a certain battery box is in a thermal runaway state, the main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box until the open fire is extinguished;
when the open fire is extinguished, the main controller acquires the oxygen concentration in the energy storage shelter in real time by using the oxygen sensor;
the main controller is also used for judging whether the energy storage shelter has explosion risk according to the oxygen concentration in the energy storage shelter and a preset first oxygen concentration standard value;
When the oxygen concentration in the energy storage shelter is greater than or equal to a preset first oxygen concentration standard value, the main controller is also used for judging that the energy storage shelter has explosion risk;
if the main controller judges that the energy storage shelter has explosion risk, the main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the energy storage shelter until the oxygen concentration in the energy storage shelter is lower than a preset second oxygen concentration standard value; wherein the second oxygen concentration standard value is smaller than the first oxygen concentration standard value;
if the main controller judges that the energy storage shelter does not have explosion risk, the main controller is further used for controlling the cooling fire extinguishing mechanism to stop spraying low-temperature liquid nitrogen into the battery box.
The embodiment fuses early detection and early warning, mid-term fire extinguishment and later explosion suppression of the energy storage fire disaster, and further solves the safety problem of the energy storage power station.
In order to realize long-term explosion suppression, in a further embodiment, after the main controller controls the cooling fire extinguishing mechanism to stop spraying low-temperature liquid nitrogen into the battery box, the main controller also utilizes the oxygen sensor to acquire the oxygen concentration in the energy storage shelter in real time;
When the oxygen concentration in the energy storage shelter is higher than a preset second oxygen concentration standard value, the main controller is further used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the energy storage shelter until the oxygen concentration in the energy storage shelter is lower than the preset second oxygen concentration standard value.
In a further embodiment, the spray assembly is further provided with a municipal fire interface for connecting municipal fire, the municipal fire interface being connected with a stop valve;
When the main controller judges that a certain battery box is in a thermal runaway state, the main controller also acquires the oxygen concentration in the energy storage shelter in real time by using the oxygen sensor;
The main controller is also used for judging whether the thermal runaway fire equivalent exceeds the protection range of liquid nitrogen and carbon dioxide according to the oxygen concentration in the energy storage shelter and a preset third oxygen concentration standard value; wherein the third oxygen concentration standard value is greater than the first oxygen concentration standard value;
When the oxygen concentration in the energy storage shelter is greater than or equal to a preset third oxygen concentration standard value, the main controller judges that the thermal runaway fire disaster equivalent exceeds the protection range of liquid nitrogen and carbon dioxide;
If the main controller judges that the equivalent of the thermal runaway fire exceeds the protection range of liquid nitrogen and carbon dioxide, the main controller controls the cooling fire extinguishing mechanism to spray water into the battery box until the open fire is extinguished;
If the main controller judges that the equivalent of the thermal runaway fire disaster does not exceed the protection range of the liquid nitrogen and the carbon dioxide, the main controller controls the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box.
According to the embodiment, when the equivalent of the thermal runaway fire exceeds the protection range of liquid nitrogen and carbon dioxide, the stop valve is opened, municipal fire fighting is introduced, and water spraying is utilized for fire extinguishing, so that omnibearing protection is realized.
It should be appreciated that the thermal runaway fire equivalent is generally calculated by using the minimum oxygen required for air combustion, and the oxygen concentration in the energy storage shelter is sensed by the oxygen sensor, and the theoretical calculation formula is as follows:
In the composition of combustibles, CO, H 2、H2 S, and C nHm are combustible components. According to the complete combustion chemical reaction formula, the volume of oxygen required for the combustion of CO, H 2、H2 S and C nHm in 1m 3 gaseous combustible is:
The unit is m 3/m3;
The combustion-supporting volume of oxygen of the combustible material is subtracted, and the minimum volume of oxygen required by complete combustion of the 1m 3 gaseous combustible material can be obtained:
the unit is m 3/m3;
In the method, in the process of the invention, Indicating the theoretical oxygen volume consumed by the combustion of the combustible.
In the embodiment, a liquid level sensor is arranged in the low-pressure liquid nitrogen storage bottle, the cooling and fire extinguishing mechanism further comprises a high-pressure carbon dioxide bottle, the high-pressure carbon dioxide bottle is communicated with the spraying assembly, a second electromagnetic valve is connected between the high-pressure carbon dioxide bottle and the spraying assembly, and the liquid level sensor, the high-pressure carbon dioxide bottle and the second electromagnetic valve are respectively and electrically connected with the main controller;
The main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen and carbon dioxide into the battery box or the energy storage shelter simultaneously when the liquid level in the low-pressure liquid nitrogen storage bottle is lower than a preset liquid level standard value.
The setting like this in this embodiment can mix low temperature liquid nitrogen and carbon dioxide and spray when the liquid nitrogen stock is not enough, carries out the cooling as far as possible when guaranteeing explosion suppression effect.
Specifically, the preset level criterion value is 20%.
In order to ensure the explosion suppression effect and simultaneously reduce the temperature as much as possible, in a further embodiment, the temperature reduction and fire extinguishing mechanism further comprises a nitrogen making module and a refrigerator, wherein the nitrogen making module is connected with the low-pressure liquid nitrogen storage bottle, the refrigerator is arranged on the low-pressure liquid nitrogen storage bottle, and the nitrogen making module and the refrigerator are respectively connected with the main controller;
When the liquid level in the low-pressure liquid nitrogen storage bottle is lower than a preset liquid level standard value, the main controller is further used for controlling the nitrogen making module to supplement nitrogen into the low-pressure liquid nitrogen storage bottle and controlling the refrigerator to convert gaseous nitrogen in the low-pressure liquid nitrogen storage bottle into liquid nitrogen.
When the liquid level in the low-pressure liquid nitrogen storage bottle is lower than a preset liquid level standard value, the nitrogen making module is started, nitrogen is supplemented into the low-pressure liquid nitrogen storage bottle, gaseous nitrogen is converted into liquid nitrogen through the refrigerator, and the state of the liquid nitrogen in low compaction is guaranteed in real time. Since the cost of high pressure storage of liquid nitrogen is 5 times that of low pressure storage, the embodiment greatly improves the safety and economy of the system.
In the embodiment, the fire control system also comprises a fire alarm controller, a combustible gas alarm controller and a fire control linkage controller; the smoke sensor, the temperature sensor and the VOC sensor are electrically connected with the fire alarm controller; the hydrogen sensor, the oxygen sensor and the carbon monoxide sensor are respectively and electrically connected with the combustible gas alarm controller; the fire alarm controller, the combustible gas alarm controller and the infrared thermal imager are respectively and electrically connected with the fire-fighting linkage controller, and the fire-fighting linkage controller is electrically connected with the main controller.
In this embodiment, the hierarchical control is performed.
In one particular embodiment, the first solenoid valve and the second solenoid valve are both on-off solenoid valves.
In another specific embodiment, the first solenoid valve and the second solenoid valve are flow regulating solenoid valves.
In the implementation, the main controller can control the proportion of liquid nitrogen or carbon dioxide or liquid nitrogen and carbon dioxide so as to be convenient for cooling or extinguishing fire according to the specific real-time state of thermal runaway and further improve the cooling or extinguishing effect.
In order to spray each battery box respectively, in the embodiment, the spraying assembly comprises a main pipeline, a plurality of branch pipelines and a plurality of spray heads;
One end of the main pipeline is connected with the first electromagnetic valve and the second electromagnetic valve respectively, the other end of the main pipeline is connected with a plurality of branch pipelines respectively, the branch pipelines are connected with a plurality of spray heads in a one-to-one correspondence manner respectively, the spray heads are used for spraying in a plurality of battery boxes in a one-to-one correspondence manner, and each branch pipeline is provided with an electric valve which is electrically connected with the main controller.
Specifically, the electric valve is a switching type electromagnetic valve.
Specifically, municipal fire control interface sets up on the trunk line.
In this embodiment, the system further comprises an alarm, and the alarm is connected with the main controller and alarms in time.
The invention also provides a cooling fire-extinguishing explosion-suppression spraying method for the energy storage power station, which comprises the following steps:
acquiring real-time state parameters and infrared thermal imaging images in each battery box in the energy storage shelter in real time; wherein the real-time status parameters include temperature, hydrogen concentration, carbon monoxide concentration, smoke concentration, and VOC concentration;
Judging the real-time state of each battery box according to the real-time state parameters of each battery box and the infrared thermal imaging image; wherein, the real-time state includes: cell overheating and thermal runaway;
When a certain battery box is in a battery overheat state, spraying low-temperature liquid nitrogen into the battery box for cooling;
when a certain battery box is in a thermal runaway state, low-temperature liquid nitrogen is sprayed into the battery box to inhibit thermal runaway.
According to the invention, real-time state parameters and infrared thermal imaging images in each battery box in the energy storage shelter are obtained in real time; wherein the real-time status parameters include temperature, hydrogen concentration, carbon monoxide concentration, smoke concentration, and VOC concentration; then, judging the real-time state of each battery box according to the real-time state parameters of each battery box and the infrared thermal imaging image; wherein, the real-time state includes: cell overheating and thermal runaway; when a certain battery box is in a battery overheat state, low-temperature liquid nitrogen is sprayed into the battery box to cool, and the surface of the battery in the battery box is cooled in advance, so that the battery is ensured to be in a safe and comfortable temperature interval; when a certain battery box is in a thermal runaway state, low-temperature liquid nitrogen is sprayed into the battery box to inhibit thermal runaway so as to rapidly control fire and prevent fire from spreading. The invention greatly improves the safety of the energy storage power station.
In this embodiment, when a certain battery box is in a thermal runaway state, the injection of low-temperature liquid nitrogen into the battery box for thermal runaway suppression specifically includes:
when a certain battery box is in a thermal runaway state, spraying low-temperature liquid nitrogen into the battery box until an open fire is extinguished;
when the open fire is extinguished, acquiring the oxygen concentration in the energy storage shelter in real time;
judging whether the energy storage shelter has explosion risk or not according to the oxygen concentration in the energy storage shelter and a preset first oxygen concentration standard value;
When the oxygen concentration in the energy storage shelter is larger than or equal to a preset first oxygen concentration standard value, judging that the energy storage shelter has explosion risk;
If the energy storage shelter is judged to have explosion risk, low-temperature liquid nitrogen is sprayed into the energy storage shelter until the oxygen concentration in the energy storage shelter is lower than a preset second oxygen concentration standard value; wherein the second oxygen concentration standard value is smaller than the first oxygen concentration standard value;
and if the energy storage shelter is judged not to have explosion risk, stopping spraying low-temperature liquid nitrogen into the battery box.
The embodiment fuses early detection and early warning, mid-term fire extinguishment and later explosion suppression of the energy storage fire disaster, and further solves the safety problem of the energy storage power station.
In a further embodiment, after stopping the injection of the cryogenic liquid nitrogen into the battery box, further comprising:
Continuously acquiring the oxygen concentration in the energy storage shelter in real time;
and when the oxygen concentration in the energy storage shelter is higher than a preset second oxygen concentration standard value, injecting low-temperature liquid nitrogen into the energy storage shelter until the oxygen concentration in the energy storage shelter is lower than the preset second oxygen concentration standard value.
The embodiment can carry out long-term explosion suppression on the energy storage shelter.
In this embodiment, in the process of spraying low-temperature liquid nitrogen into the battery box or the energy storage shelter, if the liquid level of the liquid nitrogen is lower than a preset liquid level standard value, spraying the low-temperature liquid nitrogen and carbon dioxide into the battery box or the energy storage shelter at the same time, so as to ensure the explosion suppression effect and reduce the temperature as much as possible when the liquid nitrogen is insufficient.
In a further embodiment, when the liquid level in the low-pressure liquid nitrogen storage bottle is lower than a preset liquid level standard value, supplementing gaseous nitrogen into the low-pressure liquid nitrogen storage bottle, and converting the gaseous nitrogen in the low-pressure liquid nitrogen storage bottle into liquid nitrogen so as to supplement the liquid nitrogen, thereby ensuring the explosion suppression effect and reducing the temperature as much as possible.
In a further embodiment, before injecting the cryogenic liquid nitrogen into a certain battery box when the battery box is in a thermal runaway state, the method further comprises:
Acquiring the oxygen concentration in the energy storage shelter in real time;
Judging whether the thermal runaway fire equivalent exceeds the protection range of liquid nitrogen and carbon dioxide according to the oxygen concentration in the energy storage shelter and a preset third oxygen concentration standard value; wherein the third oxygen concentration standard value is greater than the first oxygen concentration standard value;
When the oxygen concentration in the energy storage shelter is greater than or equal to a preset third oxygen concentration standard value, judging that the thermal runaway fire disaster equivalent exceeds the protection range of liquid nitrogen and carbon dioxide;
If the equivalent of the thermal runaway fire exceeds the protection range of liquid nitrogen and carbon dioxide, water is sprayed into the energy storage shelter until the open fire is extinguished;
And if the equivalent of the thermal runaway fire is judged not to exceed the protection range of the liquid nitrogen and the carbon dioxide, spraying low-temperature liquid nitrogen into the battery box.
The embodiment can extinguish fire by utilizing water when the equivalent of the thermal runaway fire exceeds the protection range of liquid nitrogen and carbon dioxide, thereby realizing omnibearing protection.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The utility model provides an energy storage power station is with cooling fire extinguishing explosion suppression injection system, energy storage power station includes energy storage shelter and installs a plurality of battery boxes in energy storage shelter, its characterized in that includes: the system comprises a detection mechanism, a main controller and a cooling and fire extinguishing mechanism;
The detection mechanism comprises an infrared thermal imager which is arranged in the energy storage shelter and is positioned outside the battery box, and a detection assembly which is arranged in each battery box; the detection assembly comprises a hydrogen sensor, a smoke sensor, a carbon monoxide sensor, a temperature sensor and a VOC sensor, wherein the smoke sensor, the temperature sensor, the VOC sensor, the carbon monoxide sensor, the hydrogen sensor and the infrared thermal imager are respectively and electrically connected with the main controller;
The cooling and fire extinguishing mechanism comprises a driving gas cylinder, a low-pressure liquid nitrogen storage bottle and a spraying assembly for spraying into each battery box; the driving gas cylinder is connected with the low-pressure liquid nitrogen storage bottle, the low-pressure liquid nitrogen storage bottle is connected with the spraying assembly, and a first electromagnetic valve is connected between the low-pressure liquid nitrogen storage bottle and the spraying assembly; the driving gas cylinder, the low-pressure liquid nitrogen storage bottle, the first electromagnetic valve and the spraying assembly are respectively and electrically connected with the main controller;
the main controller is used for judging the real-time state of each battery box according to the real-time state parameters of each battery box and the infrared thermal imaging image; wherein, the real-time state includes: cell overheating and thermal runaway;
When the main controller judges that a certain battery box is in a battery overheat state, the main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box for cooling;
When the main controller judges that a certain battery box is in a thermal runaway state, the main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box for thermal runaway inhibition;
The detection mechanism further comprises an oxygen sensor which is arranged in the energy storage shelter and positioned outside the battery box, and the oxygen sensor is electrically connected with the main controller; the spraying assembly is also used for spraying into the energy storage shelter;
when the main controller judges that a certain battery box is in a thermal runaway state, the main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box until the open fire is extinguished;
when the open fire is extinguished, the main controller acquires the oxygen concentration in the energy storage shelter in real time by using the oxygen sensor;
the main controller is also used for judging whether the energy storage shelter has explosion risk according to the oxygen concentration in the energy storage shelter and a preset first oxygen concentration standard value;
When the oxygen concentration in the energy storage shelter is greater than or equal to a preset first oxygen concentration standard value, the main controller is also used for judging that the energy storage shelter has explosion risk;
if the main controller judges that the energy storage shelter has explosion risk, the main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the energy storage shelter until the oxygen concentration in the energy storage shelter is lower than a preset second oxygen concentration standard value; wherein the second oxygen concentration standard value is smaller than the first oxygen concentration standard value;
if the main controller judges that the energy storage shelter does not have explosion risk, the main controller is also used for controlling the cooling fire extinguishing mechanism to stop spraying low-temperature liquid nitrogen into the battery box;
the low-pressure liquid nitrogen storage bottle is internally provided with a liquid level sensor, the cooling and fire extinguishing mechanism further comprises a high-pressure carbon dioxide bottle, the high-pressure carbon dioxide bottle is communicated with the spraying assembly, a second electromagnetic valve is connected between the high-pressure carbon dioxide bottle and the spraying assembly, and the liquid level sensor, the high-pressure carbon dioxide bottle and the second electromagnetic valve are respectively and electrically connected with the main controller;
the main controller is also used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen and carbon dioxide into the battery box or the energy storage shelter at the same time when the liquid level in the low-pressure liquid nitrogen storage bottle is lower than a preset liquid level standard value;
the temperature-reducing fire-extinguishing mechanism further comprises a nitrogen-making module and a refrigerator, wherein the nitrogen-making module is connected with the low-pressure liquid nitrogen storage bottle, the refrigerator is arranged on the low-pressure liquid nitrogen storage bottle, and the nitrogen-making module and the refrigerator are respectively connected with the main controller;
When the liquid level in the low-pressure liquid nitrogen storage bottle is lower than a preset liquid level standard value, the main controller is also used for controlling the nitrogen making module to supplement nitrogen into the low-pressure liquid nitrogen storage bottle and controlling the refrigerator to convert gaseous nitrogen in the low-pressure liquid nitrogen storage bottle into liquid nitrogen;
the spraying assembly is further provided with a municipal fire-fighting interface used for connecting municipal fire-fighting, and the municipal fire-fighting interface is connected with a stop valve;
When the main controller judges that a certain battery box is in a thermal runaway state, the main controller also acquires the oxygen concentration in the energy storage shelter in real time by using the oxygen sensor;
The main controller is also used for judging whether the thermal runaway fire equivalent exceeds the protection range of liquid nitrogen and carbon dioxide according to the oxygen concentration in the energy storage shelter and a preset third oxygen concentration standard value; wherein the third oxygen concentration standard value is greater than the first oxygen concentration standard value;
When the oxygen concentration in the energy storage shelter is greater than or equal to a preset third oxygen concentration standard value, the main controller judges that the thermal runaway fire disaster equivalent exceeds the protection range of liquid nitrogen and carbon dioxide;
If the main controller judges that the equivalent of the thermal runaway fire exceeds the protection range of liquid nitrogen and carbon dioxide, the main controller controls the cooling fire extinguishing mechanism to spray water into the battery box until the open fire is extinguished;
If the main controller judges that the equivalent of the thermal runaway fire disaster does not exceed the protection range of the liquid nitrogen and the carbon dioxide, the main controller controls the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the battery box.
2. The cooling fire extinguishing explosion suppression injection system for the energy storage power station according to claim 1, wherein after the main controller controls the cooling fire extinguishing mechanism to stop injecting low-temperature liquid nitrogen into the battery box, the main controller also acquires the oxygen concentration in the energy storage shelter in real time by utilizing the oxygen sensor;
When the oxygen concentration in the energy storage shelter is higher than a preset second oxygen concentration standard value, the main controller is further used for controlling the cooling fire extinguishing mechanism to spray low-temperature liquid nitrogen into the energy storage shelter until the oxygen concentration in the energy storage shelter is lower than the preset second oxygen concentration standard value.
3. A cooling fire extinguishing explosion suppression injection method for an energy storage power station, based on the cooling fire extinguishing explosion suppression injection system for the energy storage power station as claimed in claim 1 or 2, comprising:
acquiring real-time state parameters and infrared thermal imaging images in each battery box in the energy storage shelter in real time; wherein the real-time status parameters include temperature, hydrogen concentration, carbon monoxide concentration, smoke concentration, and VOC concentration;
Judging the real-time state of each battery box according to the real-time state parameters of each battery box and the infrared thermal imaging image; wherein, the real-time state includes: cell overheating and thermal runaway;
When a certain battery box is in a battery overheat state, spraying low-temperature liquid nitrogen into the battery box for cooling;
when a certain battery box is in a thermal runaway state, low-temperature liquid nitrogen is sprayed into the battery box to inhibit thermal runaway.
4. The cooling fire extinguishing explosion suppression injection method for the energy storage power station according to claim 3, wherein when a certain battery box is in a thermal runaway state, low-temperature liquid nitrogen is injected into the battery box to perform thermal runaway suppression, and the method specifically comprises the following steps:
when a certain battery box is in a thermal runaway state, spraying low-temperature liquid nitrogen into the battery box until an open fire is extinguished;
when the open fire is extinguished, acquiring the oxygen concentration in the energy storage shelter in real time;
judging whether the energy storage shelter has explosion risk or not according to the oxygen concentration in the energy storage shelter and a preset first oxygen concentration standard value;
When the oxygen concentration in the energy storage shelter is larger than or equal to a preset first oxygen concentration standard value, judging that the energy storage shelter has explosion risk;
If the energy storage shelter is judged to have explosion risk, low-temperature liquid nitrogen is sprayed into the energy storage shelter until the oxygen concentration in the energy storage shelter is lower than a preset second oxygen concentration standard value; wherein the second oxygen concentration standard value is smaller than the first oxygen concentration standard value;
and if the energy storage shelter is judged not to have explosion risk, stopping spraying low-temperature liquid nitrogen into the battery box.
5. The method for cooling, fire extinguishing and explosion suppression injection for an energy storage power station of claim 4, further comprising, after stopping injection of low temperature liquid nitrogen into the battery box:
Continuously acquiring the oxygen concentration in the energy storage shelter in real time;
and when the oxygen concentration in the energy storage shelter is higher than a preset second oxygen concentration standard value, injecting low-temperature liquid nitrogen into the energy storage shelter until the oxygen concentration in the energy storage shelter is lower than the preset second oxygen concentration standard value.
6. The cooling fire extinguishing explosion suppression injection method for the energy storage power station according to any one of claims 3 to 5, wherein in the process of injecting low-temperature liquid nitrogen into the battery box or the energy storage shelter, if the liquid level of the liquid nitrogen is lower than a preset liquid level standard value, the low-temperature liquid nitrogen and the carbon dioxide are injected into the battery box or the energy storage shelter at the same time;
when the liquid level in the low-pressure liquid nitrogen storage bottle is lower than a preset liquid level standard value, supplementing gaseous nitrogen into the low-pressure liquid nitrogen storage bottle, and converting the gaseous nitrogen in the low-pressure liquid nitrogen storage bottle into liquid nitrogen.
7. The method of claim 6, further comprising, before injecting low-temperature liquid nitrogen into a certain battery box when the battery box is in a thermal runaway state:
Acquiring the oxygen concentration in the energy storage shelter in real time;
Judging whether the thermal runaway fire equivalent exceeds the protection range of liquid nitrogen and carbon dioxide according to the oxygen concentration in the energy storage shelter and a preset third oxygen concentration standard value; wherein the third oxygen concentration standard value is greater than the first oxygen concentration standard value;
When the oxygen concentration in the energy storage shelter is greater than or equal to a preset third oxygen concentration standard value, judging that the thermal runaway fire disaster equivalent exceeds the protection range of liquid nitrogen and carbon dioxide;
If the equivalent of the thermal runaway fire exceeds the protection range of liquid nitrogen and carbon dioxide, water is sprayed into the energy storage shelter until the open fire is extinguished;
And if the equivalent of the thermal runaway fire is judged not to exceed the protection range of the liquid nitrogen and the carbon dioxide, spraying low-temperature liquid nitrogen into the battery box.
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