CN115770372A - Intelligent circulating detection fire extinguishing system for energy storage power station and application method of intelligent circulating detection fire extinguishing system - Google Patents
Intelligent circulating detection fire extinguishing system for energy storage power station and application method of intelligent circulating detection fire extinguishing system Download PDFInfo
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Abstract
The invention relates to the field of energy storage power stations, in particular to an intelligent circulating detection fire extinguishing system of an energy storage power station and a using method thereof. An intelligent circulating detection fire extinguishing system of an energy storage power station comprises a detection fire extinguishing system body, wherein the detection fire extinguishing system body comprises an air compressor, a main electromagnetic valve, a dryer, a nitrogen making device, a one-way valve, a nitrogen storage bottle, a pressure reducing device, a thermal management device, a first electromagnetic valve, a main pipeline, a second electromagnetic valve and an atomizing nozzle which are sequentially connected; the main pipeline is connected with a third electromagnetic valve, and the third electromagnetic valve is connected with a fire extinguishing device; the atomizer sets up in the battery cabinet, is equipped with the battery cluster in the battery cabinet, and the atomizer setting is in the top of battery cluster. According to the invention, low-temperature, low-concentration and low-oxygen even oxygen-insulated inerting spaces are formed in the three-level spaces of the energy storage station, namely the battery cabinet, the battery cluster and the battery box, so that the safety of the energy storage station is ensured, and the active and passive full life cycle protection of the battery cabinet of the energy storage station is realized.
Description
Technical Field
The invention relates to the field of energy storage power stations, in particular to an intelligent circulating detection fire extinguishing system of an energy storage power station and a using method thereof.
Background
The application of energy storage in various fields is more and more extensive, the security problem of an energy storage station is increasingly concerned, the battery cabinets are used as independent units for charging and discharging in the energy storage station, the safety and economic requirements of a single battery cabinet are increasingly outstanding, the battery boxes of the battery clusters in the battery cabinet can generate heat, combustible gas and oxygen in the charging and discharging process, if the heat and the combustible gas are circularly gathered, the heat, the combustible gas and the oxygen cannot be timely discharged out of the battery boxes, the battery clusters and the battery cabinet, and the combustible gas in the battery cabinets, the battery clusters and the battery cabinet can be combusted or even exploded when exposed fire caused by aging of circuits in the battery cabinets and the battery clusters, thermal runaway or overhigh temperature in the battery boxes occurs, the combustion or explosion of the single battery cabinet can influence the combustion or explosion of other battery cabinets in the energy storage station in a linkage manner, and environmental pollution and social panic can be caused besides economic loss.
The battery cabinet of the existing energy storage station only adopts a smoke or temperature sensor for detection, the smoke sensor or the temperature sensor is arranged at the top of the battery cabinet and is far away from the battery cluster and the battery box, so that the internal environment changes of the battery cluster and the battery box cannot be detected in time, and when the smoke or temperature changes are detected, the thermal runaway of the battery cluster and the battery box cannot be avoided; the battery cabinet of the existing energy storage station is only provided with an automatic dry powder fire extinguishing system or a handheld dry powder device, and the dry powder fire extinguishing agent cannot effectively extinguish battery fire and is passive fire extinguishing, so that advance prevention cannot be realized; the conventional battery cabinet of the energy storage station has no forced cooling system or exhaust system, so that heat, combustible gas and oxygen in the battery cabinet, the battery cluster and the battery box cannot be forcibly replaced out of the battery cabinet, the battery cluster and the battery box, low-temperature and inerting environment spaces are formed in the battery cabinet, the battery cluster and the battery box, and the occurrence of thermal runaway is actively prevented; because the battery boxes inside the battery cabinets in the energy storage station are large in number and are placed in a centralized mode, if a vehicle-mounted battery box detection method is adopted to arrange a detector inside each battery box to detect the internal environment state of each battery box, the manufacturing cost of the energy storage station can be greatly increased, and the energy storage station cannot be popularized in a large batch mode.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
The invention aims to provide an intelligent circulating detection fire extinguishing system for an energy storage power station and a using method thereof, so as to solve at least one technical problem.
In order to achieve the purpose, the invention adopts the following technical scheme:
an intelligent circulating detection fire extinguishing system of an energy storage power station comprises a detection fire extinguishing system body, and is characterized in that the detection fire extinguishing system body comprises an air compressor, a main electromagnetic valve, a dryer, a nitrogen making device, a one-way valve, a nitrogen storage bottle, a pressure reducing device, a heat management device, a first electromagnetic valve, a main pipeline, a second electromagnetic valve and an atomizing nozzle which are connected in sequence;
the main pipeline is connected with a third electromagnetic valve, and the third electromagnetic valve is connected with a fire extinguishing device;
the atomization nozzle is arranged in a battery cabinet, a battery cluster is arranged in the battery cabinet, and the atomization nozzle is arranged above the battery cluster;
the atomization spray head is connected with a three-position three-way electromagnetic valve, the three-position three-way electromagnetic valve is connected with a slave pipeline, the battery cluster comprises a battery box, the slave pipeline is connected with a battery box spray head, and the spray direction of the battery box spray head faces to the battery box;
the three-position three-way electromagnetic valve is connected with an air extracting pump, and the air extracting pump is connected with a centralized detector;
a thermosensitive wire is arranged in the battery cluster and connected with a thermosensitive wire temperature sensor;
an exhaust fan is arranged in the battery cabinet;
a pressure sensor and a temperature sensor are arranged in the battery cabinet;
the main electromagnetic valve, the pressure reducing device, the heat management device, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the three-position three-way electromagnetic valve, the air extracting pump, the centralized detector, the thermosensitive wire temperature sensor, the exhaust fan, the pressure sensor and the temperature sensor are all connected with a main controller.
Store up and be equipped with in the nitrogen bottle and store up nitrogen bottle pressure sensor, it connects to store up nitrogen bottle pressure sensor main control unit.
The detection fire extinguishing system body comprises a standby nitrogen storage bottle, the standby nitrogen storage bottle is connected with a fourth electromagnetic valve, and the fourth electromagnetic valve is connected with a pressure reducing device.
A CO sensor and H are arranged in the centralized detector 2 Concentration sensor, VOC sensor, O 2 Concentration sensor, smoke sensor.
And a plurality of battery boxes inside the battery cluster are connected in parallel through secondary pipelines. Or each battery box in the battery cluster corresponds to one three-position three-way electromagnetic valve.
The heat-sensitive wires are attached to the outsides of the plurality of battery boxes in the battery cluster, and the heat-sensitive wires attached to the outsides of the plurality of battery boxes are the same heat-sensitive wire.
The use method of the intelligent circulating detection fire extinguishing system of the energy storage power station is characterized by comprising the following steps:
the method comprises the following steps: the main controller judges the pressure and the residual nitrogen amount of the nitrogen storage bottle according to the measured value of the pressure sensor of the nitrogen storage bottle, when the measured value of the pressure sensor of the nitrogen storage bottle is lower than a set value, the main controller communicates with a main electromagnetic valve, the main electromagnetic valve is opened, an air compressor provides a high-pressure air source, the high-pressure air source filters moisture and impurities in air through a drier and then enters a nitrogen making device to separate nitrogen from waste gas in the air, and the nitrogen is stored in the nitrogen storage bottle through a one-way valve;
step two: when the second electromagnetic valve requests the main controller to be opened, nitrogen in the nitrogen storage bottle passes through the pressure reducing device, high-pressure nitrogen is reduced to a low-pressure state, the temperature of the nitrogen is reduced by the low-pressure nitrogen through the heat management device, meanwhile, an exhaust fan in the battery cabinet is opened to exhaust air in a forced convection mode, heat, combustible gas and oxygen generated in the charging and discharging process of a battery box in the battery cabinet are exhausted out of the battery cabinet, a pressure sensor and a temperature sensor which are installed in the battery cabinet monitor the pressure and temperature parameter change in the battery cabinet in real time and feed back the pressure and temperature parameter change to the main controller, the main controller judges according to temperature data detected by the temperature sensor, and when the temperature in the battery cabinet is lower than a set temperature threshold value of the battery cabinet, the exhaust fan is closed;
the method comprises the following steps that nitrogen in a nitrogen storage bottle is filled into a battery cabinet through a first electromagnetic valve, a main pipeline and a second electromagnetic valve, after pressure data detected by a pressure sensor in the battery cabinet reaches a set pressure threshold value of the battery cabinet, a main controller closes the first electromagnetic valve and the second electromagnetic valve through a circuit, so that the interior of the battery cabinet is in a micro-positive pressure state, the concentration and the pressure of the nitrogen in the battery cabinet are ensured, and combustible gas and oxygen are replaced to the outside of the battery cabinet in time;
step three: the air pump pumps the gas in the battery box to the centralized detector through the battery box spray head, the slave pipeline and the three-position three-way electromagnetic valve, and the CO sensor and the H sensor in the centralized detector 2 Concentration sensor, VOC sensor, O 2 The concentration sensor and the smoke sensor are used for detecting and analyzing gas, the centralized detector is used for transmitting gas data to the main controller through a line, the main controller is used for judging according to a set threshold value, and the internal state of the battery box is divided into a normal working state and an abnormal working state;
when the internal state of the battery box is a normal working state, the nitrogen in the nitrogen storage bottle passes through the pressure reducing device to reduce the pressure of high-pressure nitrogen to a low-pressure state, the low-pressure nitrogen is cooled through the heat management device, and low-temperature nitrogen is sprayed into the battery box from the pipeline and the battery box sprayer through the first electromagnetic valve, the main pipeline, the second electromagnetic valve and the three-position three-way electromagnetic valve to form a low-temperature, low-concentration and low-oxygen inerting environment in the battery box;
when the internal state of the battery box is an abnormal working state, namely the thermal runaway state of the battery box, the main controller controls the opening of the third electromagnetic valve, the fire extinguishing agent and the nitrogen in the fire extinguishing device simultaneously enter the main pipeline, and are divided into two paths after passing through the second electromagnetic valve, one path of the fire extinguishing agent forms a gas-liquid two-phase mixture after passing through the atomizing nozzle and is directly sprayed into the battery cluster through the atomizing nozzle, and the other path of the fire extinguishing agent forms a gas-liquid two-phase mixture after passing through the three-position three-way electromagnetic valve, the slave pipeline and the battery box nozzle and enters the battery box through the battery box nozzle, so that the simultaneous cooling and fire extinguishing of the inside and the outside of the battery box are realized;
step four: a thermosensitive wire is attached to the outside of a battery box inside the same battery cluster, the battery box inside the same battery cluster is connected in series through the thermosensitive wire, the temperature of the outer side of the battery box is detected through a thermosensitive wire sensor and fed back to a main controller, when the temperature detected by the thermosensitive wire sensor reaches a set threshold value of the temperature of the battery box, the main controller controls the opening of a third electromagnetic valve, fire extinguishing agents and nitrogen in the fire extinguishing device simultaneously enter a main pipeline, the fire extinguishing agents and the nitrogen are divided into two paths after passing through a second electromagnetic valve, one path of the fire extinguishing agents forms a gas-liquid two-phase mixture after passing through an atomizing nozzle, the other path of the fire extinguishing agents directly sprays the inside of the battery cluster through the atomizing nozzle, the other path of the fire extinguishing agents passes through a three-position three-way electromagnetic valve, the slave pipeline and the battery box nozzle form a gas-liquid two-phase mixture, the gas-liquid two-phase mixture enters the inside of the battery box through the battery box nozzle, and the inside and outside of the battery box are cooled and extinguished simultaneously.
In the first step, the nitrogen making device is connected with a standby nitrogen storage bottle through a one-way valve, the standby nitrogen storage bottle is connected with a fourth electromagnetic valve, and the fourth electromagnetic valve is connected with a pressure reducing device.
In the third step, a plurality of battery boxes in the same battery cluster are connected together through a secondary pipeline and are divided into centralized detection and distributed detection according to the installation position of the three-position three-way electromagnetic valve;
the centralized detection is that a plurality of battery boxes in the same battery cluster are connected in parallel through pipelines, and when an air suction pump works, all gases in the battery boxes in the same battery cluster are simultaneously extracted and sent to the centralized detector through a three-position three-way electromagnetic valve for internal detection and analysis;
distributed detection is that each battery box in the same battery cluster corresponds to a three-position three-way electromagnetic valve, and when the air extracting pump works, air extraction detection analysis of a single battery box is realized through the circulating on-off of the three-position three-way electromagnetic valves corresponding to different battery boxes.
The invention adopts three-stage detection technology, adopts a centralized forced air extraction mode to collect the gas in the battery box, and integrates H 2 Concentration sensor, O 2 The concentration sensor, the VOC sensor, the CO sensor and the smoke sensor are integrated with the detector and used for detecting the internal environment change of the battery box; detecting the temperature change of the battery box by adopting a thermosensitive wire outside the battery box; a pressure sensor and a temperature sensor are adopted in the battery cabinet to detect the internal pressure and temperature change of the battery cabinet. According to tertiary detection data, intelligent judgment is carried out with a set threshold value, a main controller intervenes automatically according to a judgment result, and switching between a normal working mode and an abnormal working mode is carried out, so that active and passive protection of the battery cabinet of the energy storage station is realized, and heat, combustible gas and oxygen in the battery cabinet, the battery cluster and the battery box are removed in time by controlling the opening and closing of an exhaust fan, a heat management device, an electromagnetic valve and an air pump, so that low-temperature, low-concentration and low-oxygen even oxygen-isolated inert spaces are formed in the battery cabinet, the battery cluster and the battery box, and the safety of the energy storage station is ensured.
Drawings
FIG. 1 is a schematic view of a portion of the structure of the present invention;
FIG. 2 is a schematic diagram of a part of the structure of a three-position three-way solenoid valve according to the present invention;
FIG. 3 is a schematic diagram of a partial structure of a three-position three-way solenoid valve according to the present invention;
fig. 4 is a partial structural view of the concentrated detector of the present invention.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1 to 4, the intelligent circulating detection fire extinguishing system for the energy storage power station comprises a detection fire extinguishing system body, wherein the detection fire extinguishing system body comprises an air compressor 1, a main electromagnetic valve 2, a dryer 3, a nitrogen making device 4, a one-way valve 5, a nitrogen storage bottle 6, a pressure reducing device 10, a thermal management device 11, a first electromagnetic valve 12, a main pipeline 20, a second electromagnetic valve 19 and an atomizing nozzle 18 which are connected in sequence; the main pipeline 20 is connected with a third electromagnetic valve 14, and the third electromagnetic valve 14 is connected with a fire extinguishing device 13; the atomizing spray head 18 is arranged in the battery cabinet 9, a battery cluster 17 is arranged in the battery cabinet 9, and the atomizing spray head 18 is arranged above the battery cluster 17; the atomization nozzle 18 is connected with a three-position three-way electromagnetic valve 23, the three-position three-way electromagnetic valve 23 is connected with a slave pipeline 22, the battery cluster 17 comprises a battery box 16, the slave pipeline 22 is connected with a battery box nozzle 31, and the spraying direction of the battery box nozzle 31 faces the battery box 16; the three-position three-way electromagnetic valve 23 is connected with an air pump 25, and the air pump 25 is connected with a centralized detector 24; a thermosensitive wire 26 is arranged in the battery cluster 17, and the thermosensitive wire 26 is connected with a thermosensitive wire temperature sensor 27; an exhaust fan 28 is arranged in the battery cabinet 9; a pressure sensor 21 and a temperature sensor 30 are arranged in the battery cabinet 9; the main electromagnetic valve 2, the pressure reducing device 10, the thermal management device 11, the first electromagnetic valve 12, the second electromagnetic valve 19, the third electromagnetic valve 14, the three-position three-way electromagnetic valve 23, the air pump 25, the centralized detector 24, the thermal wire temperature sensor 27, the exhaust fan 28, the pressure sensor 21 and the temperature sensor 30 are all connected with the main controller 15. According to the design, the invention provides an intelligent circulating detection fire extinguishing system for the energy storage power station, and low-temperature, low-concentration and low-oxygen or even anaerobic inerting spaces are formed in three-level spaces of the energy storage station, namely a battery cabinet 9, a battery cluster 17 and a battery box 16, so that the safety of the energy storage station is ensured, and the active and passive full life cycle protection of the battery cabinet 9 of the energy storage station is realized.
In order to ensure the use effect of the detection fire extinguishing system body, the pressure reducing device 10 adopts a pressure reducing valve; the thermal management device 11 adopts a cooling device; the exhaust fan 28 is plural.
Be equipped with in the nitrogen storage bottle 6 and store up nitrogen bottle 6 pressure sensor 21, store up nitrogen bottle 6 pressure sensor 21 and connect main control unit 15 to main control unit 15 judges the pressure of nitrogen storage bottle 6 and the remaining nitrogen volume according to the measured value of storing up nitrogen bottle 6 pressure sensor 21. The pressure sensor 21 and the temperature sensor 30 are mounted on the top of the battery cabinet 9, so that the pressure sensor 21 and the temperature sensor 30 can monitor the pressure and temperature parameter changes in the battery cabinet 9 in real time. Survey fire extinguishing systems body includes reserve nitrogen storage bottle 8, reserve nitrogen storage bottle 8 connects fourth solenoid valve 7, pressure relief device 10 is connected to fourth solenoid valve 7, nitrogen making device 4 connects reserve nitrogen storage bottle 8 through check valve 5, reserve nitrogen storage bottle 8 has increased the nitrogen storage volume, and can cool down and put out a fire at surveying fire extinguishing systems body, open fourth solenoid valve 7, make in 6 interior nitrogen gas of nitrogen storage bottle and reserve nitrogen storage bottle 8 nitrogen gas together participate in the fire extinguishing process of cooling down, the pressure of guarantee nitrogen gas, improve the fire extinguishing effects of cooling down.
The centralized detector 24 is internally provided with a CO sensor 32 and a H sensor 2 Concentration sensor 33, VOC sensor 34, O 2 Concentration sensor 35, smoke sensor 36.CO sensor 32, H 2 Concentration sensor 33, VOC sensor 34, O 2 The concentration sensor 35 and the smoke sensor 36 are both connected to the main controller 15 so as to detect gas data in the battery box 16.
When a plurality of battery boxes 16 in the battery cluster 17 are connected in parallel through the slave pipeline 22, only one three-position three-way electromagnetic valve 23 is needed to perform gas detection on the battery boxes 16 of the same battery cluster 17, so that the setting cost of the system is reduced; or, each battery box 16 inside the battery cluster 17 corresponds to one three-position three-way electromagnetic valve 23, that is, the atomizer 18 is connected with the three-position three-way electromagnetic valves 23 matched with the number of the battery boxes 16, and the evacuation detection analysis of a single battery box 16 is realized through the cyclic on-off of the three-position three-way electromagnetic valves 23 corresponding to different battery boxes 16, so that nitrogen or a gas-liquid two-phase mixture is conveniently sprayed into the corresponding battery boxes 16 point to point, and the accurate positioning detection analysis and the accurate positioning intervention are realized.
A use method of an intelligent circulating detection fire extinguishing system of an energy storage power station comprises the following steps: the method comprises the following steps: the main controller 15 judges the pressure and the residual nitrogen amount of the nitrogen storage bottle 6 according to the measured value of the pressure sensor 21 of the nitrogen storage bottle 6, when the measured value of the pressure sensor 21 of the nitrogen storage bottle 6 is lower than a set value, the main controller 15 communicates with the main electromagnetic valve 2, the main electromagnetic valve 2 is opened, the air compressor 1 provides a high-pressure air source, the high-pressure air source enters the nitrogen making device 4 after moisture and impurities in the air are filtered by the drier 3, the nitrogen and waste gas in the air are separated, and the nitrogen is stored in the nitrogen storage bottle 6 through the one-way valve 5; step two: when the second electromagnetic valve 19 requests the main controller 15 to be opened, the nitrogen in the nitrogen storage bottle 6 passes through the pressure reducing device 10 to reduce the pressure of the high-pressure nitrogen to a low-pressure state, the low-pressure nitrogen passes through the thermal management device 11 to reduce the temperature of the nitrogen, meanwhile, the exhaust fan 28 in the battery cabinet 9 is opened to forcibly exhaust air in a convection manner, heat, combustible gas and oxygen generated in the charging and discharging processes of the battery box 16 in the battery cabinet 9 are exhausted out of the battery cabinet 9, the pressure sensor 21 and the temperature sensor 30 installed in the battery cabinet 9 monitor the pressure and temperature parameter changes in the battery cabinet 9 in real time and feed back the changes to the main controller 15, the main controller 15 judges according to temperature data detected by the temperature sensor 30, and when the temperature in the battery cabinet 9 is lower than a set threshold value of the temperature of the battery cabinet 9, the exhaust fan 28 is closed; the nitrogen in the nitrogen storage bottle 6 is filled into the battery cabinet 9 through the first electromagnetic valve 12, the main pipeline 20 and the second electromagnetic valve 19, and after pressure data detected by the pressure sensor 21 in the battery cabinet 9 reaches a pressure set threshold value of the battery cabinet 9, the main controller 15 closes the first electromagnetic valve 12 and the second electromagnetic valve 19 through the line 29, so that the interior of the battery cabinet 9 is in a micro-positive pressure state, the concentration and the pressure of the nitrogen in the battery cabinet 9 are ensured, and combustible gas and oxygen are replaced to the exterior of the battery cabinet 9 in time; step three: the air pump 25 pumps the gas in the battery box 16 to the centralized detector 24 through the battery box spray head 31, the pipeline 22 and the three-position three-way electromagnetic valve 23, and the CO sensor 32 and the H in the centralized detector 24 2 Concentration sensor 33, VOC sensor 34, O 2 The concentration sensor 35 and the smoke sensor 36 perform detection and analysis on the gas, and the centralized detector 24 transmits the gas data to the main controller 15 through the line 29, and the main controllerThe device 15 judges according to the set threshold value, and divides the internal state of the battery box 16 into a normal working state and an abnormal working state; when the internal state of the battery box 16 is a normal working state, nitrogen in the nitrogen storage bottle 6 passes through the pressure reducing device 10, the high-pressure nitrogen is reduced to a low-pressure state, the low-pressure nitrogen is cooled through the heat management device 11, and low-temperature nitrogen is sprayed into the battery box 16 through the first electromagnetic valve 12, the main pipeline 20, the second electromagnetic valve 19, the three-position three-way electromagnetic valve 23, the auxiliary pipeline 22 and the battery box sprayer 31, so that a low-temperature, low-concentration and low-oxygen inerting environment is formed in the battery box 16; when the internal state of the battery box 16 is an abnormal working state, namely the thermal runaway state of the battery box 16, the main controller 15 controls the opening of the third electromagnetic valve 14, the fire extinguishing agent and the nitrogen in the fire extinguishing device 13 simultaneously enter the main pipeline 20, and are divided into two paths after passing through the second electromagnetic valve 19, one path of the fire extinguishing agent and the nitrogen form a gas-liquid two-phase mixture after passing through the atomizer 18 and is directly sprayed inside the battery cluster 17 through the atomizer 18, and the other path of the fire extinguishing agent and the nitrogen form a gas-liquid two-phase mixture after passing through the three-position three-way electromagnetic valve 23, the slave pipeline 22 and the battery box sprayer 31 and enter the battery box 16 through the battery box sprayer 31, so that the internal and external of the battery box 16 are simultaneously cooled and extinguished; step four: a thermosensitive wire 26 is attached to the outside of a battery box 16 in the same battery cluster 17, the thermosensitive wire 26 connects the battery boxes 16 in the same battery cluster 17 in series, the temperature of the outside of the battery box 16 is detected through a thermosensitive wire temperature sensor 27 and fed back to the main controller 15, when the temperature detected by the thermosensitive wire temperature sensor 27 reaches a set threshold value of the temperature of the battery box 16, the main controller 15 controls the opening of the third electromagnetic valve 14, the fire extinguishing agent and the nitrogen in the fire extinguishing device 13 simultaneously enter the main pipeline 20, the fire extinguishing agent and the nitrogen are divided into two paths through the second electromagnetic valve 19, one path forms a gas-liquid two-phase mixture after passing through the atomizer 18, the gas-liquid two-phase mixture is directly sprayed inside the battery cluster 17 through the atomizer 18, the other path forms a gas-liquid two-phase mixture after passing through the three-position three-way electromagnetic valve 23, the slave pipeline 22 and the battery box sprayer 31, and enters the battery box 16 through the battery box sprayer 31, so as to realize the simultaneous cooling and fire extinguishing inside and outside of the battery box 16. The invention adopts a three-level space joint detection scheme to detect the factors which can induce thermal runaway and early thermal runaway representation in the energy storage battery cabinet 9, the battery cluster 17 and the battery box 16, and transmits detection information to the main controller 15, namely the main controllerThe controller 15 makes a judgment according to the set threshold value, the judgment result is fed back to the actuating mechanism, and the actuating mechanism makes a corresponding action.
In the first step, the nitrogen making device 4 is connected with a standby nitrogen storage bottle 8 through a one-way valve 5, the standby nitrogen storage bottle 8 is connected with a fourth electromagnetic valve 7, and the fourth electromagnetic valve 7 is connected with a pressure reducing device 10. Nitrogen gas is not allowed to use when normal mode in reserve nitrogen gas storage bottle 6, only uses at abnormal mode, and the cooperation fire extinguishing agent realizes putting out a fire fast, and reserve nitrogen gas storage bottle 8 is interior nitrogen gas and need keep the pressure more than 0.8MPa, guarantees enough pressure and dose when battery thermal runaway. When the internal state of the battery box 16 is an abnormal working state, the main controller 15 controls the pressure reducing device 10 to be in an open state and not to reduce the pressure, and nitrogen in the nitrogen storage bottle 6 forms low-temperature high-pressure nitrogen after passing through the pressure reducing device 10 and the heat management device 11, so that the low-temperature high-pressure nitrogen and the fire extinguishing agent enter the main pipeline 20 simultaneously.
In the third step, a plurality of battery boxes 16 in the same battery cluster 17 are connected together through a secondary pipeline 22 and are divided into centralized detection and distributed detection according to the installation position of a three-position three-way electromagnetic valve 23; as shown in fig. 2, a plurality of battery boxes 16 in the same battery cluster 17 are detected in a centralized manner and connected in parallel through a secondary pipeline 22, and when an air pump 25 works, the air in all the battery boxes 16 in the same battery cluster 17 is simultaneously extracted and sent to a centralized detector 24 through a three-position three-way electromagnetic valve 23 for detection and analysis; as shown in fig. 3, distributed detection is that each battery box 16 in the same battery cluster 17 corresponds to one three-position three-way electromagnetic valve 23, and when the air extracting pump 25 works, air extraction detection analysis of a single battery box 16 is realized through the circulating on-off of the three-position three-way electromagnetic valves 23 corresponding to different battery boxes 16. Once distributed detection detects the internal abnormality of the battery box 16, nitrogen or a gas-liquid two-phase mixture can be sprayed into the corresponding battery box 16 point to point, so that accurate positioning detection analysis and accurate positioning intervention are realized.
The invention has the following advantages:
(1) Realize in the battery cabinet and integrate with the outside detection module of battery box: h 2 Concentration sensor, smoke concentration sensor, VOC sensor, CO sensor, O 2 The integration, the light weight, the miniaturization and the economy of a detection device and a system are realized by combining a concentration sensor, a pressure sensor and a temperature sensor;
(2) High-concentration nitrogen is filled in the battery chamber, the battery cluster and the battery box, combustible gas and oxygen generated in the charging and discharging process of the battery box are replaced to the outside of the battery chamber, the battery cluster and the battery box, and an inerting low-oxygen environment or even an oxygen-insulated environment is formed in the battery chamber, the battery cluster and the battery box to prevent fire;
(3) When nitrogen is charged into the battery chamber, the battery cluster and the battery box, the fan is started to forcibly discharge the nitrogen, so that heat, combustible gas and oxygen generated in the charging and discharging processes of the battery box are forcedly convected to the outside of the battery chamber, and meanwhile, the effect of cooling the inside of the battery chamber, the battery cluster and the battery box by low-temperature nitrogen is realized;
(4) When a fire disaster happens in the cell chamber, the cell cluster and the cell box, high-pressure nitrogen in the standby nitrogen storage bottle and the fire extinguishing agent in the fire extinguishing device are sprayed into a gas-liquid two-phase mixture which corresponds to the thermal runaway cell cluster and the cell box through the atomizing spray heads through pipelines at fixed points, when the high-pressure nitrogen and the fire extinguishing agent pass through the atomizing spray heads arranged at the tops of the cell clusters, the liquid fire extinguishing agent can be atomized into a fine water mist shape, the high-pressure nitrogen is mixed at the same time, the mixed gas-liquid two-phase mixture submerges the whole cell chamber, the cell cluster and the cell box in an all-around dead angle-free manner, the temperature is quickly reduced, oxygen is isolated, and the best fire extinguishing effect is achieved;
(5) The internal air extraction analysis detection of the battery box, the external temperature detection of the battery box and the internal temperature and pressure detection of the battery cabinet can be realized, three-level three-dimensional detection is realized, and the detection is more accurate, scientific and fine;
(6) Forcibly extracting gas in the battery box by using an air extracting pump for detection and analysis, detecting the internal environment change of the battery box in real time, and realizing early discovery, early warning and early intervention by using a high-precision sensor;
(7) The batteries in the same battery cluster share one centralized detector, so that single detection analysis and centralized detection analysis can be realized according to whether the corresponding electromagnetic valves are connected in series outside the battery box, the number of the detectors is optimized on the basis of ensuring accurate detection, and the cost is saved;
(8) The batteries in the same battery cluster can adopt a one-to-one correspondence mode of the battery boxes and the electromagnetic valves, the internal gas of the single battery box can be circularly and sequentially extracted when the air extracting pump extracts air, the single battery box can be accurately positioned through analysis of a centralized detector, and nitrogen or a gas-liquid two-phase mixture is sprayed into the corresponding battery box through the corresponding electromagnetic valve connected with the pipeline of the battery box, so that quick positioning and quick fire extinguishing are realized, and the situation that the single battery is out of control due to thermal runaway and links the whole battery cluster and the battery chamber, and greater economic loss is caused is avoided;
(9) The upper surface, the lower surface and a side of each battery box inside the same battery cluster are wound with the thermosensitive wires 26, the thermosensitive wires on the surfaces of the battery boxes in the whole battery cluster are a whole, the surface temperature of the battery boxes inside the battery cluster is connected in series, and once the surface temperature of a certain battery box is abnormal, the whole battery cluster is submerged by a gas-liquid two-phase mixture, the thermal runaway spreading is avoided, and the greater economic loss is obtained.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An intelligent circulating detection fire extinguishing system of an energy storage power station comprises a detection fire extinguishing system body, and is characterized in that the detection fire extinguishing system body comprises an air compressor, a main electromagnetic valve, a dryer, a nitrogen making device, a one-way valve, a nitrogen storage bottle, a pressure reducing device, a heat management device, a first electromagnetic valve, a main pipeline, a second electromagnetic valve and an atomizing nozzle which are connected in sequence;
the main pipeline is connected with a third electromagnetic valve, and the third electromagnetic valve is connected with a fire extinguishing device;
the atomization nozzle is arranged in a battery cabinet, a battery cluster is arranged in the battery cabinet, and the atomization nozzle is arranged above the battery cluster;
the atomization spray head is connected with a three-position three-way electromagnetic valve, the three-position three-way electromagnetic valve is connected with a slave pipeline, the battery cluster comprises a battery box, the slave pipeline is connected with a battery box spray head, and the spray direction of the battery box spray head faces to the battery box;
the three-position three-way electromagnetic valve is connected with an air extracting pump, and the air extracting pump is connected with a centralized detector;
a thermosensitive wire is arranged in the battery cluster and connected with a thermosensitive wire temperature sensor;
an exhaust fan is arranged in the battery cabinet;
a pressure sensor and a temperature sensor are arranged in the battery cabinet;
the main electromagnetic valve, the pressure reducing device, the heat management device, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the three-position three-way electromagnetic valve, the air extracting pump, the centralized detector, the thermosensitive wire temperature sensor, the exhaust fan, the pressure sensor and the temperature sensor are all connected with a main controller.
2. The intelligent cyclic detection fire extinguishing system for the energy storage power station as claimed in claim 1, wherein a nitrogen storage bottle pressure sensor is arranged in the nitrogen storage bottle, and the nitrogen storage bottle pressure sensor is connected with the main controller.
3. The intelligent circulating detection fire-extinguishing system for energy storage power stations as claimed in claim 1, wherein the detection fire-extinguishing system body comprises a standby nitrogen storage bottle, the standby nitrogen storage bottle is connected with a fourth electromagnetic valve, and the fourth electromagnetic valve is connected with a pressure reducing device.
4. The intelligent circulating detection fire extinguishing system for energy storage power stations as claimed in claim 1, wherein a CO sensor and H are arranged in the centralized detector 2 Concentration sensor, VOC sensor, O 2 Concentration sensor, smoke sensor.
5. The intelligent cyclic detection fire extinguishing system for the energy storage power station as claimed in claim 1, wherein a plurality of the battery boxes inside the battery cluster are connected in parallel through secondary pipelines.
6. The intelligent cyclic detection fire extinguishing system for the energy storage power station as claimed in claim 1, wherein each battery box inside the battery cluster corresponds to a three-position three-way electromagnetic valve.
7. The intelligent cyclic detection fire extinguishing system for the energy storage power station as claimed in claim 1, wherein the heat-sensitive wires are attached to the outsides of a plurality of the battery boxes in the battery cluster, and the heat-sensitive wires attached to the outsides of the plurality of the battery boxes are the same heat-sensitive wire.
8. The use method of the intelligent circulating detection fire extinguishing system of the energy storage power station is characterized by comprising the following steps:
the method comprises the following steps: the main controller judges the pressure and the residual nitrogen amount of the nitrogen storage bottle according to the measured value of the pressure sensor of the nitrogen storage bottle, when the measured value of the pressure sensor of the nitrogen storage bottle is lower than a set value, the main controller communicates with a main electromagnetic valve, the main electromagnetic valve is opened, an air compressor provides a high-pressure air source, the high-pressure air source filters moisture and impurities in air through a drier and then enters a nitrogen making device to separate nitrogen from waste gas in the air, and the nitrogen is stored in the nitrogen storage bottle through a one-way valve;
step two: when the second electromagnetic valve requests the main controller to be opened, nitrogen in the nitrogen storage bottle passes through the pressure reducing device, high-pressure nitrogen is reduced to a low-pressure state, the temperature of the nitrogen is reduced by the low-pressure nitrogen through the heat management device, meanwhile, an exhaust fan in the battery cabinet is opened to exhaust air in a forced convection mode, heat, combustible gas and oxygen generated in the charging and discharging process of a battery box in the battery cabinet are exhausted out of the battery cabinet, a pressure sensor and a temperature sensor which are installed in the battery cabinet monitor the pressure and temperature parameter change in the battery cabinet in real time and feed back the pressure and temperature parameter change to the main controller, the main controller judges according to temperature data detected by the temperature sensor, and when the temperature in the battery cabinet is lower than a set temperature threshold value of the battery cabinet, the exhaust fan is closed;
the method comprises the following steps that nitrogen in a nitrogen storage bottle is filled into a battery cabinet through a first electromagnetic valve, a main pipeline and a second electromagnetic valve, after pressure data detected by a pressure sensor in the battery cabinet reaches a set pressure threshold value of the battery cabinet, a main controller closes the first electromagnetic valve and the second electromagnetic valve through a circuit, so that the interior of the battery cabinet is in a micro-positive pressure state, the concentration and the pressure of the nitrogen in the battery cabinet are ensured, and combustible gas and oxygen are replaced to the outside of the battery cabinet in time;
step three: the air pump pumps the gas in the battery box to the centralized detector through the battery box spray head, the slave pipeline and the three-position three-way electromagnetic valve, and the CO sensor and the H sensor in the centralized detector 2 Concentration sensor, VOC sensor, O 2 The concentration sensor and the smoke sensor are used for detecting and analyzing gas, the centralized detector is used for transmitting gas data to the main controller through a line, the main controller is used for judging according to a set threshold value, and the internal state of the battery box is divided into a normal working state and an abnormal working state;
when the internal state of the battery box is a normal working state, the nitrogen in the nitrogen storage bottle passes through the pressure reducing device to reduce the pressure of high-pressure nitrogen to a low-pressure state, the low-pressure nitrogen is cooled through the heat management device, and low-temperature nitrogen is sprayed into the battery box from the pipeline and the battery box sprayer through the first electromagnetic valve, the main pipeline, the second electromagnetic valve and the three-position three-way electromagnetic valve to form a low-temperature, low-concentration and low-oxygen inerting environment in the battery box;
when the internal state of the battery box is an abnormal working state, namely the thermal runaway state of the battery box, the main controller controls the opening of the third electromagnetic valve, the fire extinguishing agent and the nitrogen in the fire extinguishing device simultaneously enter the main pipeline, and are divided into two paths after passing through the second electromagnetic valve, one path of the fire extinguishing agent forms a gas-liquid two-phase mixture after passing through the atomizing nozzle and is directly sprayed into the battery cluster through the atomizing nozzle, and the other path of the fire extinguishing agent forms a gas-liquid two-phase mixture after passing through the three-position three-way electromagnetic valve, the slave pipeline and the battery box nozzle and enters the battery box through the battery box nozzle, so that the simultaneous cooling and fire extinguishing of the inside and the outside of the battery box are realized;
step four: the battery box of same battery cluster inside is attached with the temperature sensing line outward, the temperature sensing line is established ties the battery box of same battery cluster inside together, survey battery box outside temperature and feed back to main control unit through the temperature sensing line sensor, when temperature reaches battery box temperature and sets for the threshold value as temperature sensing line sensor detection temperature, main control unit control third solenoid valve is opened, fire extinguishing agent and the nitrogen gas in the extinguishing device get into the main line simultaneously, divide into two the tunnel behind the second solenoid valve, form the two-phase mixture of gas-liquid after atomizer all the way, directly spout inside the battery cluster through atomizer, another all the way is through three position three way solenoid valve, form the two-phase mixture of gas-liquid behind pipeline and the battery box shower nozzle, get into inside the battery box through the battery box shower nozzle, realize inside the battery box, outer simultaneous cooling is put out a fire.
9. The use method of the intelligent cyclic detection fire extinguishing system for the energy storage power station as claimed in claim 8, wherein in the first step, the nitrogen making device is connected with a spare nitrogen storage bottle through a one-way valve, the spare nitrogen storage bottle is connected with a fourth electromagnetic valve, and the fourth electromagnetic valve is connected with a pressure reducing device.
10. The use method of the intelligent cyclic detection fire extinguishing system of the energy storage power station as claimed in claim 8, wherein in the third step, a plurality of battery boxes in the same battery cluster are connected together through a secondary pipeline, and the detection is divided into centralized detection and distributed detection according to the installation position of the three-position three-way electromagnetic valve;
the centralized detection is that a plurality of battery boxes in the same battery cluster are connected in parallel through pipelines, and when an air extraction pump works, the air in all the battery boxes in the same battery cluster is extracted at the same time and is sent to the centralized detector for internal detection and analysis through a three-position three-way electromagnetic valve;
distributed detection is that each battery box in the same battery cluster corresponds to a three-position three-way electromagnetic valve, and when the air extracting pump works, air extraction detection analysis of a single battery box is realized through the circulating on-off of the three-position three-way electromagnetic valves corresponding to different battery boxes.
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| CN117919632A (en) * | 2024-03-25 | 2024-04-26 | 安徽中科中涣智能装备股份有限公司 | Cooling fire extinguishing explosion suppression injection system and method for energy storage power station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117919632A (en) * | 2024-03-25 | 2024-04-26 | 安徽中科中涣智能装备股份有限公司 | Cooling fire extinguishing explosion suppression injection system and method for energy storage power station |
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