CN117618827A - Automatic fire extinguishing system for energy storage battery prefabricated cabin - Google Patents
Automatic fire extinguishing system for energy storage battery prefabricated cabin Download PDFInfo
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- CN117618827A CN117618827A CN202311702465.7A CN202311702465A CN117618827A CN 117618827 A CN117618827 A CN 117618827A CN 202311702465 A CN202311702465 A CN 202311702465A CN 117618827 A CN117618827 A CN 117618827A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/14—Toxic gas alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/16—Combustible gas alarms
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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Abstract
The invention discloses an automatic fire extinguishing system of an energy storage battery prefabricated cabin, wherein a detection subsystem comprises a cabin-level detection device and a PACK-level detection device; through cabin level detection device and PACK level detection device, can monitor the accurate control to the cabinet body in the prefabricated cabin of energy storage battery and the inside battery package. The detection subsystem is used for acquiring cabin-level detection data and PACK-level detection data, so that the battery thermal runaway characteristic parameters can be monitored in an omnibearing and precise manner, and the false alarm rate generated by data jitter can be effectively reduced by a judgment mode that the carbon monoxide concentration, the hydrogen concentration, the temperature and the smoke concentration are simultaneously referenced by multiple characteristic parameters. Simultaneously, based on alarm control logic, the control instruction of the battery pipeline system and the control instruction of the execution subsystem are acquired in combination with different thermal runaway stages of the battery; the battery thermal runaway can be controlled in the sprouting stage, and the occurrence probability of explosion accidents of the prefabricated cabin can be greatly reduced.
Description
Technical Field
The invention relates to the technical field of energy storage and fire control, in particular to an energy storage battery prefabricated cabin automatic fire extinguishing system.
Background
In the process of firing an energy storage power station, chemical reaction still occurs in the battery of the energy storage battery prefabricated cabin, so that domino effect can be caused, and the traditional fire fighting is difficult to extinguish; the energy storage fire control is an important safety line of the energy storage power station, and the battery thermal runaway needs to be effectively pre-warned and the fire disaster is extinguished to prevent the reburning. Meanwhile, the lithium battery thermal runaway needs to be effectively pre-warned, and the fire disaster is extinguished to prevent the reburning. However, after thermal runaway occurs in the energy storage power station, the disaster spreads rapidly, the smoke dust is large, the re-burning is easy, the difficulty in putting out the fire is high, and once the dangerous situation is not found in time, the dangerous situation is controlled in time, so that serious personnel injury and property loss are caused. The existing energy storage battery prefabricated cabin is fire-fighting, accurate detection cannot be carried out on the condition inside the energy storage battery prefabricated cabin, and in case of dangerous situations, fire is controlled and extinguished manually, so that timely and effective control of fire is difficult at the initial stage of fire occurrence.
Disclosure of Invention
The invention provides an automatic fire extinguishing system of an energy storage battery prefabricated cabin, which aims to overcome the technical problems.
In order to achieve the above object, the technical scheme of the present invention is as follows:
an energy storage battery prefabricated cabin automatic fire extinguishing system comprises a control subsystem, a detection subsystem and an execution subsystem;
the detection subsystem comprises a cabin-level detection device and a PACK-level detection device;
the cabin-level detection device is used for acquiring cabin-level detection data in a cabinet body of the energy storage battery prefabricated cabin; the cabin-level detection data comprises a first carbon monoxide CO concentration, a hydrogen H2 concentration, a first temperature, and a first smoke concentration;
the PACK level detection device is used for acquiring PACK level detection data in a battery PACK of the energy storage battery prefabricated cabin; the PACK level detection data comprise the concentration of carbon monoxide CO in the battery cell, the monitoring temperature of the battery cell and the concentration of smoke in the battery cell;
the control subsystem is used for acquiring control instructions based on alarm control logic according to the cabin-level detection data and the PACK-level detection data, wherein the control instructions comprise control instructions for a battery pipeline system and control instructions for an execution subsystem;
the execution subsystem comprises a cabin-level pipe network fire extinguishing system and a Pack-level internal injection fire extinguishing system, and is used for starting the execution subsystem to extinguish fire when the control instruction is a control instruction for the execution subsystem.
Further, the alarm control logic is as follows:
when the cabin-level detection data reach the primary cabin-level alarm linkage condition, the control subsystem controls the battery management system to close an air conditioning system of the energy storage battery prefabricated cabin, starts the exhaust fan and the audible and visual alarm device, and unlocks an access control system of the energy storage battery prefabricated cabin;
when the cabin-level detection data reach the secondary cabin-level alarm linkage condition, the control subsystem controls the battery management system to close the exhaust fan and starts the cabin-level pipe network fire extinguishing system to extinguish fire;
when the PACK-level detection data reach a primary PACK-level alarm linkage condition, the control subsystem records the PACK-level detection data;
when the PACK level detection data reach the secondary PACK level alarm linkage condition, the control subsystem controls the battery management system to start the audible and visual alarm device, starts the exhaust system, and simultaneously disconnects the main distribution switch in the energy storage battery prefabricated cabin to realize the electrical isolation of the energy storage battery prefabricated cabin;
when the PACK level detection data reach the three-level PACK level alarm linkage condition, the control subsystem controls the battery management system to close the exhaust system, and meanwhile, the PACK level internal injection fire extinguishing system is started to extinguish fire.
Further, the first-level cabin-level alarm linkage conditions are as follows:
when the second carbon monoxide concentration threshold value is greater than or equal to the first carbon monoxide concentration threshold value, the second hydrogen concentration threshold value is greater than or equal to the first hydrogen concentration threshold value, and the hydrogen H2 concentration is greater than or equal to the first hydrogen concentration threshold value, and the duration is greater than the first duration threshold value;
or the first smoke concentration is more than or equal to a first smoke concentration threshold value, and the duration is longer than a first duration threshold value;
or when the first temperature is more than or equal to the first temperature threshold value and the duration time is longer than the first duration time threshold value, the cabin-level detection data reach the primary cabin-level alarm linkage condition.
Further, the secondary cabin-level alarm linkage conditions are as follows:
when the first carbon monoxide CO concentration is more than or equal to the second carbon monoxide concentration threshold, the hydrogen H2 concentration is more than or equal to the second hydrogen concentration threshold, the first temperature is more than or equal to the first temperature threshold, and the duration is longer than the first duration threshold;
or the first carbon monoxide CO concentration is more than or equal to a second carbon monoxide concentration threshold, the hydrogen H2 concentration is more than or equal to a second hydrogen concentration threshold, the first smoke concentration is more than or equal to a first smoke concentration threshold, and the duration is longer than a first duration threshold;
or the first temperature is more than or equal to a first temperature threshold value, the first smoke concentration is more than or equal to a first smoke concentration threshold value, and when the duration time is longer than a first duration time threshold value, the detection data of the cabin-level detection device reach a secondary cabin-level alarm linkage condition;
wherein the second carbon monoxide concentration threshold > the first carbon monoxide concentration threshold;
second hydrogen concentration threshold > first hydrogen concentration threshold.
Further, the first-level PACK-level alarm linkage condition is as follows:
when the carbon monoxide CO concentration threshold value of the second battery monomer is greater than or equal to the carbon monoxide CO concentration threshold value of the first battery monomer, and the duration time is greater than the second duration time threshold value;
or the second battery monomer monitoring smoke concentration threshold value is greater than or equal to the first battery monomer monitoring smoke concentration threshold value, and the duration time is greater than the second duration time threshold value;
or the second battery monomer monitoring temperature threshold value is greater than or equal to the first battery monomer monitoring temperature threshold value, and when the duration time is greater than the second duration time threshold value, the PACK level detection data reach the primary PACK level alarm linkage condition.
Further, the linkage conditions of the secondary PACK level alarm are as follows:
when the carbon monoxide concentration of the battery monomer is more than or equal to the carbon monoxide concentration threshold of the second battery monomer, and the monitoring smoke concentration of the battery monomer is more than or equal to the monitoring smoke concentration threshold of the second battery monomer, the duration is longer than the second duration threshold;
or the second battery monomer monitoring smoke concentration threshold value > the battery monomer monitoring smoke concentration is more than or equal to the first battery monomer monitoring smoke concentration threshold value, and meanwhile, the second battery monomer monitoring temperature threshold value > the battery monomer monitoring temperature is more than or equal to the first battery monomer monitoring temperature threshold value, and when the duration time is more than the second duration time threshold value, the PACK level detection data reach the second PACK level alarm linkage condition;
wherein the second cell CO concentration threshold > the first cell CO concentration threshold;
the second cell monitoring smoke concentration threshold > the first cell monitoring smoke concentration threshold.
Further, the three-level PACK-level alarm linkage conditions are as follows:
when the smoke concentration monitored by the battery monomer is more than or equal to the smoke concentration threshold monitored by the second battery monomer, and the carbon monoxide concentration of the battery monomer is more than or equal to the carbon monoxide concentration threshold of the second battery monomer, and the duration is more than the third duration threshold;
or the carbon monoxide concentration of the battery monomer is more than or equal to the carbon monoxide concentration threshold of the second battery monomer, the monitoring smoke concentration of the battery monomer is more than or equal to the monitoring smoke concentration threshold of the second battery monomer, and when the monitoring temperature of the battery monomer is more than or equal to the monitoring temperature threshold of the second battery monomer, the PACK level detection data reach the three-level PACK level alarm linkage condition;
the second battery cell monitoring temperature threshold value is greater than the first battery cell monitoring temperature threshold value;
the third duration threshold > the second duration threshold.
Furthermore, the cabin-level pipe network fire extinguishing system and the Pack-level internal spraying fire extinguishing system both adopt perfluoro-hexanone as fire extinguishing media.
The beneficial effects are that: according to the automatic fire extinguishing system for the energy storage battery prefabricated cabin, the cabin body and the inside of the battery PACK of the energy storage battery prefabricated cabin can be accurately monitored through the cabin-level detection device and the PACK-level detection device. The detection subsystem is used for acquiring cabin-level detection data and PACK-level detection data, so that the battery thermal runaway characteristic parameters can be monitored in an omnibearing and precise manner, and the false alarm rate generated by data jitter can be effectively reduced by a judgment mode that the carbon monoxide concentration, the hydrogen concentration, the temperature and the smoke concentration are simultaneously referenced by multiple characteristic parameters. Simultaneously, based on alarm control logic, the control instruction of the battery pipeline system and the control instruction of the execution subsystem are acquired in combination with different thermal runaway stages of the battery; the battery thermal runaway can be controlled in the sprouting stage, and the occurrence probability of explosion accidents of the prefabricated cabin can be greatly reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of a structural framework of an energy storage battery prefabricated cabin automatic fire extinguishing system according to the present invention;
FIG. 2 is a schematic diagram of a structural frame of an automatic fire extinguishing system of an energy storage battery prefabricated cabin in an embodiment of the invention;
FIG. 3 is a schematic diagram of alarm logic flow in an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment provides an energy storage battery prefabricated cabin automatic fire extinguishing system, as shown in fig. 1 and 2, comprising: the system comprises a control subsystem, a detection subsystem and an execution subsystem;
the detection subsystem comprises a cabin-level detection device and a PACK-level detection device;
the cabin-level detection device is used for acquiring cabin-level detection data in a cabinet body of the energy storage battery prefabricated cabin; the cabin-level detection data comprises a first carbon monoxide CO concentration, a hydrogen H2 concentration, a first temperature, and a first smoke concentration; from CO combustible gas detectors, H 2 The device comprises a combustible gas detector, a point type temperature sensing detector and a point type smoke sensing detector;
the PACK level detection device is used for detecting data of the PACK level in a battery PACK of the energy storage battery prefabricated cabin; the PACK level detection data comprise the concentration of carbon monoxide CO in the battery cell, the monitoring temperature of the battery cell and the concentration of smoke in the battery cell;
the PACK level detection device of this embodiment comprises built-in monitoring module, integrates four detection elements of CO, VOC, temperature and smog, and is small, can install in battery PACK, guarantees the seal of battery package, and the dismouting is also simpler. The problem that the space in the battery PACK of PACK level is limited and a common detector cannot be placed in the battery PACK is solved well.
The control subsystem is used for acquiring control instructions based on alarm control logic according to the cabin-level detection data and the PACK-level detection data, wherein the control instructions comprise control instructions for a battery pipeline system and control instructions for an execution subsystem; to control the battery plumbing system and the execution subsystem; specifically, an audible and visual alarm device, an exhaust system, an air conditioning system and an execution subsystem in a battery pipeline system are controlled;
specifically, the control subsystem in this embodiment is mainly implemented by an existing fire alarm controller, and is configured to receive cabin-level detection data and PACK-level detection data, and perform linkage on devices such as an audible and visual alarm device and an exhaust fan according to the condition of the detection data. When a fire hazard is detected, an alarm signal is triggered, the alarm signal is transmitted to a fire alarm controller, and the fire alarm controller is linked with an audible and visual alarm device and the like to alarm, buzzing and flashing of a lamp.
The execution subsystem comprises a cabin-level pipe network fire extinguishing system and a Pack-level internal injection fire extinguishing system, and is used for starting the execution subsystem to extinguish fire when the control instruction is a control instruction for the execution subsystem.
Specifically, the fire extinguishing system of the energy storage battery prefabricated cabin supports two modes of manual and automatic triggering linkage fire extinguishing. The execution subsystem comprises a cabin-level pipe network fire extinguishing system and a Pack-level internal spraying fire extinguishing system, the cabin-level pipe network fire extinguishing system is arranged on the top of the interior of the battery cabin, a spray head of the Pack-level internal spraying fire extinguishing system is directly arranged on the outer side of the battery Pack, and the spray head faces the interior of the battery Pack, so that the tightness of the whole space of the battery Pack is ensured. The fire extinguishing device comprises a cabin-level pipe network fire extinguishing system and a Pack-level internal spraying fire extinguishing system, which are both used by the existing fire extinguishing system, wherein the fire extinguishing devices of the two fire extinguishing systems adopt a perfluorinated hexanone bottle group with controllable pressure and flow rate, and nitrogen and perfluorinated hexanone are filled in the bottle.
Preferably, as shown in fig. 3, the control subsystem obtains the control instruction according to the alarm control logic as follows:
when the cabin-level detection data reach the primary cabin-level alarm linkage condition, the control subsystem controls the battery management system to close the air conditioning system of the energy storage battery prefabricated cabin, starts the exhaust fan and the audible and visual alarm device, and unlocks the access control system of the energy storage battery prefabricated cabin; specifically, an air conditioning system, an exhaust fan, an audible and visual alarm device and an access control system of the energy storage battery prefabricated cabin all belong to a part of a battery pipeline system.
When the cabin-level detection data reach the secondary cabin-level alarm linkage condition, the batteries in the energy storage battery prefabricated cabin are completely out of control, the exhaust fan is closed, and the cabin-level pipe network fire extinguishing system is started to extinguish the fire of the cabinet body of the energy storage battery prefabricated cabin;
when the PACK-level detection data reach a primary PACK-level alarm linkage condition, the control subsystem records the PACK-level detection data;
when the PACK level detection data reach the secondary PACK level alarm linkage condition, the control subsystem controls the battery management system to start the audible and visual alarm device, controls the audible and visual alarm device to buzzing and flashing lights, performs safety inspection on the battery cluster manually, starts the exhaust system, and simultaneously disconnects the total distribution switch in the energy storage battery prefabricated cabin to realize electrical isolation of the energy storage battery prefabricated cabin;
when the PACK level detection data reach the three-level PACK level alarm linkage condition, the fact that a thermal runaway fire disaster (generated by open fire) occurs in the space of the energy storage cabin is judged, the control subsystem controls the battery management system to be linked to close the exhaust system, meanwhile, the PACK level internal injection fire extinguishing system is started, and the perfluorinated hexanone bottle group with controllable pressure and flow rate is adopted for fire extinguishment.
Preferably, the primary cabin-level alarm linkage conditions are as follows:
when the second carbon monoxide concentration threshold value is greater than or equal to the first carbon monoxide concentration threshold value, the second hydrogen concentration threshold value is greater than or equal to the first hydrogen concentration threshold value, and the hydrogen H2 concentration is greater than or equal to the first hydrogen concentration threshold value, and the duration is greater than the first duration threshold value;
or the first smoke concentration is more than or equal to a first smoke concentration threshold value, and the duration is longer than a first duration threshold value;
or when the first temperature is more than or equal to a first temperature threshold value and the duration time is longer than a first duration time threshold value, the cabin-level detection data reach a first-level cabin-level alarm linkage condition;
preferably, the secondary cabin-level alarm linkage conditions are as follows:
when the first carbon monoxide CO concentration is more than or equal to the second carbon monoxide concentration threshold, the hydrogen H2 concentration is more than or equal to the second hydrogen concentration threshold, the first temperature is more than or equal to the first temperature threshold, and the duration is longer than the first duration threshold;
or the first carbon monoxide CO concentration is more than or equal to a second carbon monoxide concentration threshold, the hydrogen H2 concentration is more than or equal to a second hydrogen concentration threshold, the first smoke concentration is more than or equal to a first smoke concentration threshold, and the duration is longer than a first duration threshold;
or the first temperature is more than or equal to a first temperature threshold value, the first smoke concentration is more than or equal to a first smoke concentration threshold value, and when the duration time is longer than a first duration time threshold value, the detection data of the cabin-level detection device reach a secondary cabin-level alarm linkage condition;
preferably, the second carbon monoxide concentration threshold > the first carbon monoxide concentration threshold;
the second hydrogen concentration threshold > a first hydrogen concentration threshold;
specifically, the cabin-level pipe network fire extinguishing system comprises two-stage cabin-level alarm linkage actions, wherein one-stage alarm linkage action is as follows: when the cabin-level detection data reach the primary alarm judgment condition, the control subsystem controls the battery management system to close the air conditioner, start the exhaust fan, start the audible and visual alarm, and unlock the access control system. When the cabin-level detection data reach the secondary alarm judgment condition, the battery in the energy storage battery prefabricated cabin is completely out of control, the battery pipeline system closes the exhaust fan, the cabin-level pipe network fire extinguishing system is linked, and the perfluorinated hexanone bottle group with controllable pressure and flow rate is adopted for fire extinguishment.
Specifically, in this embodiment, the first-level cabin-level alarm linkage conditions are: (1) the first carbon monoxide CO concentration detected by the CO detector is more than or equal to 190ppm, and the hydrogen H2 concentration detected by the H2 detector is as follows: 50% LEL > hydrogen H2 concentration is not less than 5% LEL; (2) the smoke detector detects that the first smoke concentration reaches 0.2-0.3dB/m; (3) the first temperature detected by the temperature-sensitive detector is more than or equal to 65 ℃. The three conditions meet one of the conditions, and in order to eliminate the phenomenon that data jitter may cause false alarm, the judging duration is set to 3s so as to ensure the accuracy of early warning, and the primary alarm linkage action can be triggered when the requirements are met.
If the cabin-level detection data does not reach the secondary cabin-level alarm linkage condition, manually checking whether fire exists, if the fire exists at the moment, manually triggering the fire extinguishing device to remove the fire, and if the fire does not exist at the moment, manually stopping the audible and visual alarm device and checking the equipment.
Specifically, in the embodiment of the invention, the secondary cabin-level alarm linkage conditions are as follows: (1) the first carbon monoxide CO concentration detected by the CO detector is more than or equal to 300ppm, the hydrogen H2 concentration detected by the H2 detector is more than or equal to 50 percent LEL, and the first temperature detected by the temperature-sensitive detector is more than or equal to 65 ℃; (2) the concentration of the first carbon monoxide detected by the CO detector is more than or equal to 300ppm, the concentration of the hydrogen H2 detected by the H2 detector is more than or equal to 50 percent LEL, and the concentration of the first smoke detected by the smoke detector reaches 0.2-0.3dB/m; (3) the first temperature detected by the temperature-sensitive detector is more than or equal to 65 ℃, and the first smoke concentration detected by the smoke-sensitive detector reaches 0.2-0.3dB/m. The three conditions are one, and in order to eliminate the phenomenon that data jitter may cause false alarm, the judging duration is set to 3s so as to ensure the accuracy of early warning, and the secondary alarm linkage action can be triggered when the requirements are met.
Preferably, the first-level PACK-level alarm linkage condition is:
when the carbon monoxide CO concentration threshold value of the second battery monomer is greater than or equal to the carbon monoxide CO concentration threshold value of the first battery monomer, and the duration time is greater than the second duration time threshold value;
or the second battery monomer monitoring smoke concentration threshold value is greater than or equal to the first battery monomer monitoring smoke concentration threshold value, and the duration time is greater than the second duration time threshold value;
or when the monitoring temperature of the second battery monomer is more than or equal to the monitoring temperature of the first battery monomer and the duration time is more than the second duration time threshold, the PACK level detection data reach the primary PACK level alarm linkage condition;
preferably, the second-level PACK level alarm linkage condition is:
when the carbon monoxide concentration of the battery monomer is more than or equal to the carbon monoxide concentration threshold of the second battery monomer, and the monitoring smoke concentration of the battery monomer is more than or equal to the monitoring smoke concentration threshold of the second battery monomer, the duration is longer than the second duration threshold;
or the second battery monomer monitoring smoke concentration threshold value > the battery monomer monitoring smoke concentration is more than or equal to the first battery monomer monitoring smoke concentration threshold value, and meanwhile, the second battery monomer monitoring temperature threshold value > the battery monomer monitoring temperature is more than or equal to the first battery monomer monitoring temperature threshold value, and when the duration time is more than the second duration time threshold value, the PACK level detection data reach the second PACK level alarm linkage condition;
the second cell carbon monoxide CO concentration threshold > the first cell carbon monoxide CO concentration threshold;
the second battery cell monitoring smoke concentration threshold > the first battery cell monitoring smoke concentration threshold;
preferably, the three-level PACK level alarm linkage conditions are:
when the smoke concentration monitored by the battery monomer is more than or equal to the smoke concentration threshold monitored by the second battery monomer, and the carbon monoxide concentration of the battery monomer is more than or equal to the carbon monoxide concentration threshold of the second battery monomer, and the duration is more than the third duration threshold;
or the carbon monoxide concentration of the battery monomer is more than or equal to the carbon monoxide concentration threshold of the second battery monomer, the monitoring smoke concentration of the battery monomer is more than or equal to the monitoring smoke concentration threshold of the second battery monomer, and when the monitoring temperature of the battery monomer is more than or equal to the monitoring temperature threshold of the second battery monomer, the PACK level detection data reach the three-level PACK level alarm linkage condition;
the second battery cell monitoring temperature threshold value is greater than the first battery cell monitoring temperature threshold value;
the third duration threshold > the second duration threshold;
specifically, in the embodiment of the invention, the PACK-level internal injection fire extinguishing system comprises three-level alarm linkage actions, wherein when the PACK-level detection data reach the two-level PACK-level alarm linkage conditions, the one-level alarm linkage actions are executed as follows: the control subsystem, namely the fire alarm controller, records alarm information. When the PACK level detection data reach the three-level PACK level alarm linkage condition, executing the two-level alarm linkage as: and judging that the energy storage cabin has potential safety hazards, determining the specific occurrence position of the potential safety hazards, sending out early warning by the fire alarm controller, and manually carrying out safety inspection on the battery cluster. At the moment, the fire alarm controller controls the audible and visual alarm to suddenly buzze and flash, and the exhaust system is started. Meanwhile, the local controller turns off the main distribution switch in the battery compartment, so that the electrical isolation of the battery compartment is realized. When the PACK level detection data reach the three-level PACK level alarm linkage condition, executing three-level alarm linkage as: and judging that a thermal runaway fire disaster (generated by open fire) occurs in the space of the energy storage cabin, closing the exhaust system by the fire alarm controller in a linkage way, simultaneously opening the Pack-level internal injection fire extinguishing system, and extinguishing the fire by using a perfluorinated hexanone bottle group with controllable pressure and flow rate.
Specifically, in this embodiment, the first-level PACK-level alarm linkage conditions are: (1) the concentration of carbon monoxide and CO of the battery monomer is more than or equal to 400ppm; (2) 0.9dB/m > the smoke concentration monitored by the battery monomer is more than or equal to 0.5dB/m; (3) the monitoring temperature of the battery monomer is more than or equal to 65 ℃. The three conditions have one condition, and in order to eliminate the phenomenon that data jitter may cause false alarm, the judging duration is set to 3s so as to ensure the accuracy of early warning, and the primary PACK level alarm linkage action can be triggered after the requirements are met.
Specifically, in this embodiment, the second-level PACK-level alarm linkage conditions are: (1) the CO concentration of the battery monomer is more than or equal to 800ppm, and the smoke concentration monitored by the battery monomer is more than or equal to 0.9dB/m; (2) 0.9dB/m > the monitoring smoke concentration of the battery monomer is more than or equal to 0.5dB/m, and the monitoring temperature of the battery monomer is more than or equal to 65 ℃. The two conditions have one condition, and in order to eliminate the phenomenon that data jitter may cause false alarm, the judging duration is set to 3s so as to ensure the accuracy of early warning, and the two-level PACK alarm linkage action can be triggered when the requirements are met.
If the PACK level detection data does not reach the three-level PACK level alarm linkage condition, manually checking whether fire exists, if the fire exists at the moment, manually triggering the fire extinguishing device to remove the fire, and if the fire does not exist at the moment, manually stopping the audible and visual alarm device and checking the equipment.
Specifically, in this embodiment, the three-level PACK alarm linkage conditions are: (1) the concentration of the smoke monitored by the battery monomer is more than or equal to 0.9dB/m, the concentration of the carbon monoxide CO of the battery monomer is more than or equal to 800ppm, and the smoke monitored by the battery monomer is kept for more than 10 s; (2) the carbon monoxide concentration of the battery monomer is more than or equal to 800ppm, the smoke concentration monitored by the battery monomer is more than or equal to 0.9dB/m, and the temperature monitored by the battery monomer is more than or equal to 85 ℃. The two conditions have one of the two conditions, and the three-level PACK-level alarm linkage action can be triggered.
Specifically, since the fire extinguishing system setting of the energy storage cabin is to be performed with reference to the standard, the setting of the first carbon monoxide concentration threshold, the first hydrogen concentration threshold, the first duration threshold, the first smoke concentration threshold, the first temperature threshold, the second carbon monoxide concentration threshold, the second hydrogen concentration threshold, and the first battery cell carbon monoxide concentration threshold, the second duration threshold, the first battery cell monitoring smoke concentration threshold, the second battery cell carbon monoxide concentration threshold, the second battery cell monitoring smoke concentration threshold, the third duration threshold, etc. in this embodiment is obtained with reference to the standard of the electric power enterprise association and the range of the selected detector.
Specifically, in the cabin-level pipe network fire extinguishing system and the Pack-level internal injection fire extinguishing system in the embodiment, perfluorinated hexanone with controllable pressure and flow rate is used as a fire extinguishing medium, and compared with the traditional pump set device, the bottle set device has lower power consumption (pump set: 7kw; bottle set: 0 kw) under the protection space with the same area; the bottle composition is lower (pump group: about 2 ten thousand yuan; bottle group: about 1 ten thousand yuan); the power supply requirement of the bottle group is lower (pump group: 380v,16A; bottle group: 24v, 1.6A); the replacement mode is friendly (the pump group has larger mass than the bottle group and is difficult to remove). Meanwhile, compared with the traditional energy storage prefabricated cabin, the energy storage prefabricated cabin adopts heptafluoropropane and fine water mist as fire extinguishing agents, the perfluorinated hexanone is in a liquid state at normal temperature, is quickly gasified after being sprayed, achieves a fire extinguishing effect through chemical inhibition and heat absorption and temperature reduction, has higher fire extinguishing efficiency than heptafluoropropane, has larger safety margin, and is lower in the design dosage of perfluorinated hexanone under equal space. And the perfluorinated hexanone has no conductivity and corrosiveness, and has better safety and environmental protection.
Aiming at the fire hazard, the system structure and the objects to be protected of the prefabricated energy storage cabin, the embodiment can effectively control the fire condition in the initial stage of fire occurrence, protect equipment and creators in better escape time, fully consider factors such as space and environment according to the position of a protection area, and realize the functions of low-power consumption real-time monitoring, accurate early warning and timely intervention fire extinguishing. According to the embodiment, the battery thermal runaway characteristic parameters are monitored in an omnibearing manner at the cabin level and the PACK level through the various detectors and the various detection elements, different thermal runaway stages of the battery are combined, different control instructions are sent out according to cabin level detection data and PACK level detection data based on fire alarm logic, different alarm linkage actions are triggered, the battery thermal runaway is controlled at the germination stage, and the occurrence probability of explosion accidents of the prefabricated cabin can be greatly reduced. The fire extinguishing system provided by the invention realizes the functions of automatic monitoring and automatic fire extinguishing, and solves the problems that in the prior art, manual operation is needed to put out fire, automatic control cannot be realized, and fire extinguishing medium cannot be conveyed into the energy storage battery for cooling and extinguishing at the first time.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. An energy storage battery prefabricated cabin automatic fire extinguishing system which is characterized in that: the system comprises a control subsystem, a detection subsystem and an execution subsystem;
the detection subsystem comprises a cabin-level detection device and a PACK-level detection device;
the cabin-level detection device is used for acquiring cabin-level detection data in a cabinet body of the energy storage battery prefabricated cabin; the cabin-level detection data comprises a first carbon monoxide CO concentration, a hydrogen H2 concentration, a first temperature, and a first smoke concentration;
the PACK level detection device is used for acquiring PACK level detection data in a battery PACK of the energy storage battery prefabricated cabin; the PACK level detection data comprise the concentration of carbon monoxide CO in the battery cell, the monitoring temperature of the battery cell and the concentration of smoke in the battery cell;
the control subsystem is used for acquiring control instructions based on alarm control logic according to the cabin-level detection data and the PACK-level detection data, wherein the control instructions comprise control instructions for a battery pipeline system and control instructions for an execution subsystem;
the execution subsystem comprises a cabin-level pipe network fire extinguishing system and a Pack-level internal injection fire extinguishing system, and is used for starting the execution subsystem to extinguish fire when the control instruction is a control instruction for the execution subsystem.
2. An energy storage battery pre-formed pod automatic fire suppression system according to claim 1, wherein: the alarm control logic is as follows:
when the cabin-level detection data reach the primary cabin-level alarm linkage condition, the control subsystem controls the battery management system to close an air conditioning system of the energy storage battery prefabricated cabin, starts the exhaust fan and the audible and visual alarm device, and unlocks an access control system of the energy storage battery prefabricated cabin;
when the cabin-level detection data reach the secondary cabin-level alarm linkage condition, the control subsystem controls the battery management system to close the exhaust fan and starts the cabin-level pipe network fire extinguishing system to extinguish fire;
when the PACK-level detection data reach a primary PACK-level alarm linkage condition, the control subsystem records the PACK-level detection data;
when the PACK level detection data reach the secondary PACK level alarm linkage condition, the control subsystem controls the battery management system to start the audible and visual alarm device, starts the exhaust system, and simultaneously disconnects the main distribution switch in the energy storage battery prefabricated cabin to realize the electrical isolation of the energy storage battery prefabricated cabin;
when the PACK level detection data reach the three-level PACK level alarm linkage condition, the control subsystem controls the battery management system to close the exhaust system, and meanwhile, the PACK level internal injection fire extinguishing system is started to extinguish fire.
3. An energy storage battery pre-formed pod automatic fire suppression system according to claim 2, wherein: the first-level cabin-level alarm linkage conditions are as follows:
when the second carbon monoxide concentration threshold value is greater than or equal to the first carbon monoxide concentration threshold value, the second hydrogen concentration threshold value is greater than or equal to the first hydrogen concentration threshold value, and the hydrogen H2 concentration is greater than or equal to the first hydrogen concentration threshold value, and the duration is greater than the first duration threshold value;
or the first smoke concentration is more than or equal to a first smoke concentration threshold value, and the duration is longer than a first duration threshold value;
or when the first temperature is more than or equal to the first temperature threshold value and the duration time is longer than the first duration time threshold value, the cabin-level detection data reach the primary cabin-level alarm linkage condition.
4. An energy storage battery pre-formed pod automatic fire suppression system according to claim 3, wherein: the secondary cabin-level alarm linkage conditions are as follows:
when the first carbon monoxide CO concentration is more than or equal to the second carbon monoxide concentration threshold, the hydrogen H2 concentration is more than or equal to the second hydrogen concentration threshold, the first temperature is more than or equal to the first temperature threshold, and the duration is longer than the first duration threshold;
or the first carbon monoxide CO concentration is more than or equal to a second carbon monoxide concentration threshold, the hydrogen H2 concentration is more than or equal to a second hydrogen concentration threshold, the first smoke concentration is more than or equal to a first smoke concentration threshold, and the duration is longer than a first duration threshold;
or the first temperature is more than or equal to a first temperature threshold value, the first smoke concentration is more than or equal to a first smoke concentration threshold value, and when the duration time is longer than a first duration time threshold value, the detection data of the cabin-level detection device reach a secondary cabin-level alarm linkage condition;
wherein the second carbon monoxide concentration threshold > the first carbon monoxide concentration threshold;
second hydrogen concentration threshold > first hydrogen concentration threshold.
5. An energy storage battery pre-formed pod automatic fire suppression system according to claim 2, wherein: the first-level PACK-level alarm linkage conditions are as follows:
when the carbon monoxide CO concentration threshold value of the second battery monomer is greater than or equal to the carbon monoxide CO concentration threshold value of the first battery monomer, and the duration time is greater than the second duration time threshold value;
or the second battery monomer monitoring smoke concentration threshold value is greater than or equal to the first battery monomer monitoring smoke concentration threshold value, and the duration time is greater than the second duration time threshold value;
or the second battery monomer monitoring temperature threshold value is greater than or equal to the first battery monomer monitoring temperature threshold value, and when the duration time is greater than the second duration time threshold value, the PACK level detection data reach the primary PACK level alarm linkage condition.
6. An energy storage battery pre-formed pod automatic fire suppression system according to claim 5, wherein: the secondary PACK-level alarm linkage conditions are as follows:
when the carbon monoxide concentration of the battery monomer is more than or equal to the carbon monoxide concentration threshold of the second battery monomer, and the monitoring smoke concentration of the battery monomer is more than or equal to the monitoring smoke concentration threshold of the second battery monomer, the duration is longer than the second duration threshold;
or the second battery monomer monitoring smoke concentration threshold value > the battery monomer monitoring smoke concentration is more than or equal to the first battery monomer monitoring smoke concentration threshold value, and meanwhile, the second battery monomer monitoring temperature threshold value > the battery monomer monitoring temperature is more than or equal to the first battery monomer monitoring temperature threshold value, and when the duration time is more than the second duration time threshold value, the PACK level detection data reach the second PACK level alarm linkage condition;
wherein the second cell CO concentration threshold > the first cell CO concentration threshold;
the second cell monitoring smoke concentration threshold > the first cell monitoring smoke concentration threshold.
7. An energy storage battery pre-formed pod automatic fire suppression system according to claim 5, wherein: the three-level PACK-level alarm linkage conditions are as follows:
when the smoke concentration monitored by the battery monomer is more than or equal to the smoke concentration threshold monitored by the second battery monomer, and the carbon monoxide concentration of the battery monomer is more than or equal to the carbon monoxide concentration threshold of the second battery monomer, and the duration is more than the third duration threshold;
or the carbon monoxide concentration of the battery monomer is more than or equal to the carbon monoxide concentration threshold of the second battery monomer, the monitoring smoke concentration of the battery monomer is more than or equal to the monitoring smoke concentration threshold of the second battery monomer, and when the monitoring temperature of the battery monomer is more than or equal to the monitoring temperature threshold of the second battery monomer, the PACK level detection data reach the three-level PACK level alarm linkage condition;
the second battery cell monitoring temperature threshold value is greater than the first battery cell monitoring temperature threshold value;
the third duration threshold > the second duration threshold.
8. An energy storage battery pre-formed pod automatic fire suppression system according to claim 1, wherein: and the cabin-level pipe network fire extinguishing system and the Pack-level internal spraying fire extinguishing system both adopt perfluoro-hexanone as fire extinguishing medium.
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| CN118982892A (en) * | 2024-10-21 | 2024-11-19 | 江西江铃集团晶马汽车有限公司 | A dynamic alarm method for a power battery fire prevention and control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118982892A (en) * | 2024-10-21 | 2024-11-19 | 江西江铃集团晶马汽车有限公司 | A dynamic alarm method for a power battery fire prevention and control system |
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