CN114614119B - Battery energy storage system, integrated safety management method, device, equipment and medium - Google Patents
Battery energy storage system, integrated safety management method, device, equipment and medium Download PDFInfo
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- CN114614119B CN114614119B CN202210233776.2A CN202210233776A CN114614119B CN 114614119 B CN114614119 B CN 114614119B CN 202210233776 A CN202210233776 A CN 202210233776A CN 114614119 B CN114614119 B CN 114614119B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 70
- 238000007726 management method Methods 0.000 title claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 46
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000003063 flame retardant Substances 0.000 claims abstract description 45
- 238000011217 control strategy Methods 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 27
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- 239000003795 chemical substances by application Substances 0.000 claims description 8
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- 239000003112 inhibitor Substances 0.000 claims description 6
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- 125000006343 heptafluoro propyl group Chemical group 0.000 claims description 5
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 10
- 229910001416 lithium ion Inorganic materials 0.000 description 10
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- 238000010521 absorption reaction Methods 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
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- 239000007789 gas Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
- A62C37/10—Releasing means, e.g. electrically released
- A62C37/11—Releasing means, e.g. electrically released heat-sensitive
- A62C37/14—Releasing means, e.g. electrically released heat-sensitive with frangible vessels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
Landscapes
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery energy storage system, an integrated safety management method, an integrated safety management device and a medium, wherein whether the temperature of a battery containing a flame retardant material exceeds an early warning value of thermal runaway of the battery is judged; if the temperature of the battery exceeds the early warning value of thermal runaway of the battery, fire is extinguished according to a fire control strategy. The battery energy storage system is mainly subjected to electric and thermal management in operation, the battery state is monitored in real time, the pre-judgment of the thermal runaway accident is realized by judging whether the battery temperature exceeds an early warning value, when the battery temperature exceeds the early warning value, the thermal runaway combustion of the battery is judged, the detection of the thermal runaway accident is realized by the electric management, the control of the thermal runaway accident is realized according to a fire control strategy, and the further diffusion of the thermal runaway of the battery is prevented.
Description
Technical Field
The invention belongs to the technical field of safety control of lithium ion battery energy storage systems, and particularly relates to a battery energy storage system, an integrated safety management method, an integrated safety management device, integrated safety management equipment and an integrated safety management medium.
Background
Prefabricated cabin energy storage systems are increasingly becoming a mainstream form of large-scale energy storage systems with their outstanding flexibility and convenience, taking up about 70% of the market share. From the current application effect, the prefabricated cabin battery energy storage system still has obvious defects in application performance and safety. In the aspect of safety, the technology of effective early warning, protection and fire control is lacking, and the integrated design of early warning, protection and fire control is not considered in the prefabricated cabin, so that frequent safety accidents are caused. In view of twenty or more fire accidents of the energy storage system occurring at home and abroad in the last two years, the safety accidents of the energy storage system/power station are always caused by the fact that the battery is out of control or the Battery Management System (BMS) fails to ignite and ignite the battery under the condition of missing or lagging early warning, and the initial fire of the battery rapidly spreads due to the lack of effective safety protection measures, but the existing fire protection measures are not configured for the fire of the battery, so that the initial fire of the battery cannot be effectively restrained, and finally evolves into a large-scale fire, so that the whole energy storage prefabricated cabin or the energy storage power station is burnt.
Potential safety hazards in the design process of the lithium ion battery energy storage system are main factors of safety accidents, and the following problems still exist in the operation of the energy storage system: (1) The battery in the energy storage system has weaker early warning function, and the impending safety accident of the battery cannot be found in time; (2) The protection function of the battery in the energy storage system cannot play a corresponding role, and the diffusion of battery safety accidents cannot be effectively prevented; (3) Fire control equipment in the energy storage system cannot effectively and rapidly control fire; (4) The design of electrical management in the energy storage system needs to be further attached to a security management policy, and basic data is provided for the security policy.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide a battery energy storage system, an integrated safety management method, an integrated safety management device, integrated safety management equipment and an integrated safety management medium, so as to realize the control of thermal runaway accidents.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an integrated security management method, comprising the steps of:
measuring a battery temperature of the battery energy storage system including the flame retardant material;
judging whether the battery temperature of the battery energy storage system containing the flame retardant material exceeds an early warning value of battery thermal runaway;
if the temperature of the battery containing the flame-retardant material of the battery energy storage system exceeds the early warning value of thermal runaway of the battery, the battery cluster is separated from the energy storage converter, and then fire is extinguished according to a fire control strategy.
Further, the early warning value of the thermal runaway of the battery is determined by the following steps:
and simulating a process when the battery module is in thermal runaway by adopting an electric-thermal coupling model, and if the temperature in the battery module is in a peak value, entering a heating process, wherein the peak value is used as an early warning value of the thermal runaway of the battery.
Further, the temperature rising rate in the temperature rising process is more than 5 ℃/min.
Further, if the battery temperature exceeds the early warning value of battery thermal runaway, the specific method for extinguishing fire according to the fire control strategy after the battery cluster is separated from the energy storage converter is as follows: if the battery temperature exceeds the early warning value of battery thermal runaway, dividing a fire extinguishing area into a battery fire extinguishing area and an electric fire extinguishing area after the battery cluster is separated from the energy storage converter; if fire occurs in the electric fire-fighting area, the heptafluoropropyl fire-extinguishing agent is adopted to extinguish the fire, and the battery fire-fighting area is adopted to extinguish the fire by adopting the fire-extinguishing medium.
Further, the electric fire-fighting area detects whether a fire occurs through smoke and temperature sensing.
Further, the battery fire-fighting area detects whether a fire disaster occurs through the fire detection pipe.
Further, if a fire disaster occurs in the battery fire-fighting area, the fire detecting tube is broken, and after the fire extinguishing medium in the fire detecting tube extinguishes the open fire, the reburning inhibitor enters the battery containing the flame retardant material through the fire detecting tube.
An integrated security management apparatus comprising:
the temperature measuring module is used for measuring the temperature of the battery containing the flame retardant material of the battery energy storage system;
the battery temperature judging module is used for judging whether the battery temperature containing the flame retardant material exceeds an early warning value of battery thermal runaway;
and the fire extinguishing module is used for separating the battery cluster from the energy storage converter and extinguishing fire according to a fire control strategy if the battery temperature exceeds the early warning value of the thermal runaway of the battery.
Further, the early warning value of the thermal runaway of the battery is determined by the following steps:
and simulating a process when the battery module is in thermal runaway by adopting an electric-thermal coupling model, and if the temperature in the battery module is in a peak value, entering a heating process, wherein the peak value is used as an early warning value of the thermal runaway of the battery.
Further, the temperature rising rate in the temperature rising process is more than 5 ℃/min.
Further, if the battery temperature exceeds the early warning value of battery thermal runaway, the specific method for extinguishing fire according to the fire control strategy after the battery cluster is separated from the energy storage converter is as follows: if the temperature of the battery containing the flame-retardant material exceeds the early warning value of thermal runaway of the battery, dividing a fire extinguishing area into a battery fire extinguishing area and an electric fire extinguishing area after the battery cluster is separated from the energy storage converter; if fire occurs in the electric fire-fighting area, the heptafluoropropyl fire-extinguishing agent is adopted to extinguish the fire, and the battery fire-fighting area is adopted to extinguish the fire by adopting the fire-extinguishing medium.
Further, the electric fire-fighting area detects whether a fire occurs through smoke and temperature sensing.
Further, the battery fire-fighting area detects whether a fire disaster occurs through the fire detection pipe.
Further, if a fire disaster occurs in the battery fire-fighting area, the fire detecting tube is broken, and after the fire extinguishing medium in the fire detecting tube extinguishes the open fire, the reburning inhibitor enters the battery containing the flame retardant material through the fire detecting tube.
A battery energy storage system comprising:
a battery cluster including a battery module;
the flame retardant material is arranged between the adjacent battery modules and is used for isolating the battery clusters and delaying fire; and
the integrated safety management device as described above is connected to the battery cluster.
Further, the thickness of the flame retardant material is determined by the following procedure:
a＝m·Q/W
wherein a is the thickness of the flame retardant material, and mm; m is the mass of the battery, kg; q is the heat productivity of the battery during combustion, MJ/kg; w is the consumption of the heat insulation material, and MJ/mm.
A computer device comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, the computer program implementing a battery energy storage system integrated safety management method as described above when executed by the processor.
A computer readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform a battery energy storage system integrated safety management method as described above.
Compared with the prior art, the invention has the beneficial effects that:
the battery energy storage system is mainly subjected to electric and thermal management in operation, the battery state is monitored in real time, the pre-judgment of the thermal runaway accident is realized by judging whether the battery temperature exceeds an early warning value, when the battery temperature exceeds the early warning value, the thermal runaway combustion of the battery is judged, the detection of the thermal runaway accident is realized by the electric management, the control of the thermal runaway accident is realized according to a fire control strategy, and the further diffusion of the thermal runaway of the battery is prevented.
Further, when the battery temperature exceeds the early warning threshold, the battery cluster is separated from the energy storage converter. When the battery fires, a fire extinguishing agent is sprayed to extinguish open fire, and then a re-burning inhibitor is sprayed to prevent re-burning.
Drawings
FIG. 1 is a flow chart of the present invention.
Fig. 2 is a schematic diagram of a thermal runaway model structure of a battery.
Fig. 3 shows battery temperature monitoring points, in which (a) is an odd-numbered battery and (b) is an even-numbered battery.
Fig. 4 is a thermal runaway temperature simulation curve of a thermal runaway model of a lithium ion battery.
Fig. 5 is a graph of a simulation of the temperature of the cells within the battery module.
FIG. 6 is a schematic diagram of a system according to the present invention.
In the figure, 1 is a 1# battery, 2 is a 2# battery, 3 is a 3# battery, 4 is a 4# battery, 5 is a 5# battery, 6 is a 6# battery, 7 is a 7# battery, 8 is a 8# battery, 9 is a 9# battery, 10 is a 10# battery, 11 is a 11# battery, 12 is a 12# battery, 13 is a 13# battery, 14 is a 14# battery, 15 is a 15# battery, 16 is a 16# battery, and 17 is a battery thermal runaway model.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The invention provides an integrated safety management method of a battery energy storage system aiming at the whole thermal runaway process of a lithium ion battery, which comprises an early warning strategy, an electric management strategy and a fire protection strategy, wherein the early warning is realized firstly, the electric and thermoelectric management is mainly, and the fire protection and protection are auxiliary safety strategies aiming at the early stage, the thermal runaway occurrence stage and the thermal runaway occurrence stage of the lithium ion battery respectively.
Specifically, the lithium ion battery energy storage system monitors the battery state in real time during operation. When the battery state parameter touches the battery early warning value, the early warning strategy is started, and the lithium ion battery energy storage system responds to separate the battery cluster from the PCS (Power Conversion System, energy storage converter). When the battery fires, the fire extinguishing system sprays fire extinguishing agent to extinguish the open fire and prevent the back-fire. The outside of the battery is provided with a protection system (i.e. a flame retardant material) which can isolate the battery clusters to prevent further spread of the battery fire when the battery fires.
Referring to fig. 1, the battery energy storage system integrated safety management method includes the steps of:
measuring a battery temperature of the battery energy storage system including the flame retardant material;
judging whether the battery temperature of the battery energy storage system containing the flame retardant material exceeds an early warning value of battery thermal runaway;
if the temperature of the battery containing the flame-retardant material of the battery energy storage system exceeds the early warning value of thermal runaway of the battery, the battery cluster is separated from the energy storage converter, and then fire is extinguished according to a fire control strategy.
Specifically, the invention comprises the following steps:
(1) And determining a lithium ion battery early warning strategy:
based on a large number of experimental calibration and mechanism researches, an electric-thermal coupling model, a safety state evaluation model and the like which consider performance attenuation in the battery use process are established, and state evaluation, optimization management and risk early warning are carried out on the operation safety of the lithium ion battery energy storage system.
For example, using a temperature-based safety warning model, the battery thermal runaway process is simulated by the battery thermal runaway model 17, and when the battery is completely thermally runaway, the battery first has a small temperature peak and then has a sudden temperature rise phenomenon.
The invention uses an electric-thermal coupling model to simulate the process of thermal runaway of the battery module, and discovers that after the temperature in the battery module has a peak value of 54-75 ℃ by a simulation method, the battery can enter a rapid temperature rise process, and the peak value is used as an early warning value of the thermal runaway of the battery.
Referring to fig. 2 and 3 (a) and (b), the battery thermal runaway model 17 includes two rows of batteries, one row including connected 1# battery, 3# battery, 5# battery, 7# battery, 9# battery, 11# battery, 13# battery, and 15# battery, and the other row including connected 2# battery, 4# battery, 6# battery, 8# battery, 10# battery, 12# battery, 14# battery, and 16# battery.
As shown in fig. 4, which shows the temperature profile of the first 2 hours in the thermal runaway process, the 1# battery and the 3# battery are overcharged, the temperatures of the adjacent 5# battery and 7# battery increase along with the increase of the temperatures of the 1# battery and the 3# battery, the 1# battery and the 7# battery almost simultaneously generate thermal runaway, the temperature increases rapidly, the temperatures of the same battery row increase gradually, and after about 35 minutes of thermal runaway of the 1# 7 battery, the 9# battery and the 15# battery generate thermal runaway sequentially, and the temperature increases rapidly. There is also a small thermal runaway before the first temperature peak occurs.
Fig. 5 shows the temperature and temperature rise rate of the thermal runaway cells after thermal runaway is induced by charging the cells 1#, 3#, 5# and 7# with 0.5C current, and it can be seen that there is a significant increase in the temperature of the cells starting after overcharging to 3000s, but then there is a significant decrease in the temperature of the cells due to the endothermic process such as melting of the flame retardant material after the temperature of the cells increases to a high point, so that the temperature of the cells decreases after reaching a temperature. The highest values of the cell temperature at this stage are 75 ℃, 55 ℃, 58 ℃ and 54 ℃ respectively, and the temperature rise rate at this stage does not exceed 5 ℃/min. And with the heat absorption process such as the melting of the flame retardant material and the end of the heat absorption reaction, a large-scale internal short circuit occurs in the battery, and the side reaction of internal heat release starts to be initiated gradually, and the temperature of the battery is rapidly increased, so that the temperature of the section is used as an early warning value of the thermal runaway model 17 of the battery.
(2) Security protection policy determination:
the battery energy storage system is divided into a plurality of parts by taking the battery modules as units, and flame retardant materials (the flame retardant materials are materials which are known in the art and can achieve the purposes of heat insulation and flame retardance) are used for separating the parts, namely, the flame retardant materials are arranged between the adjacent battery modules, so that the thermal runaway is prevented from spreading from 1 battery module to the other 1 battery module. The provision of flame retardant materials serves two purposes: 1) Preventing thermal runaway propagation; 2) More time is striven for fire fighting, and the fire is extinguished before the thermal runaway is spread, so that the probability of expanding the fire is reduced.
The lithium ion battery is heated to trigger the thermal behavior after thermal runaway combustion, a large amount of hydrogen, carbon monoxide and VOC can be emitted, the hydrogen, the carbon monoxide and the VOC are taken as characteristics to be measured, the combustion flame temperature and the gas component of the energy storage battery are obtained, the combustion flame temperature and the gas component of the energy storage battery are converted into heating value and release heat, and accordingly the thickness of the flame retardant material is calculated.
The thickness of the insulating material is calculated as follows: the heat productivity of the battery is about 20-40MJ/kg when the battery is completely burnt, and the heat produced by the combustion of the battery is different due to the different batteries of different manufacturers, so that the estimation can be performed according to the quality of the battery. The heat productivity of the battery is Q MJ/kg, the mass of the battery is m kg, and the heat release of the battery is about m.Q MJ when the battery is completely burnt. The amount of the heat insulating material used for achieving the heat insulating effect is W MJ/mm, and therefore the thickness a of the heat insulating material is m.Q/W mm.
(3) Fire control strategy determination:
after the battery is out of control, aiming at the battery energy storage system of the prefabricated cabin, the fire extinguishing area is divided into a battery fire extinguishing area and an electric fire extinguishing area. The electric fire-fighting area uses smoke sense and temperature sense to detect fire and uses the heptafluoropropyl fire-extinguishing agent to extinguish fire. When the fire disaster occurs, the fire detecting tube breaks the fire extinguishing medium to extinguish the fire, and after the fire extinguishing medium is released, the reburning inhibitor enters the fire detecting tube in the battery box through the same path to continuously cool the battery, so that the reburning of the battery is prevented; the fire protection strategy of the prefabricated cabin energy storage system is adopted.
Referring to fig. 6, a battery energy storage system integrated safety management device includes:
the battery temperature measuring module is used for measuring the battery temperature of the battery energy storage system, which contains the flame retardant material;
the battery temperature judging module is used for judging whether the battery temperature containing the flame retardant material exceeds an early warning value of battery thermal runaway;
and the fire extinguishing module is used for extinguishing fire according to a fire control strategy after the battery cluster is separated from the energy storage converter if the battery temperature exceeds the early warning value of battery thermal runaway.
A computer device comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, the computer program implementing a battery energy storage system integrated safety management method as described above when executed by the processor.
The present invention is directed to a battery energy storage system comprising:
a battery cluster including a battery module;
the flame retardant material is arranged between the adjacent battery modules and is used for isolating the battery clusters and delaying fire; and
and the integrated safety management device is connected with the battery cluster.
A computer readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform a battery energy storage system integrated safety management method as described above.
The invention realizes multi-level control on the energy storage system, the early warning strategy realizes the prejudgment of the thermal runaway accident, the electric management realizes the detection of the thermal runaway accident, the fire control strategy realizes the control of the thermal runaway accident, and the further diffusion of the thermal runaway of the battery is prevented. The battery system is mainly used for electric and thermal management in operation, and the state of the battery is monitored in real time. When the battery state parameter touches the battery early warning value, an early warning is sent out, the system responds, and the battery cluster is separated from the PCS. The fire-fighting system detects the state of the battery, and when the battery fires, a fire extinguishing agent is sprayed in to extinguish the open fire and prevent the open fire from re-burning.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (13)
1. An integrated security management method is characterized by comprising the following steps:
measuring a battery temperature of the battery energy storage system including the flame retardant material;
judging whether the battery temperature of the battery energy storage system containing the flame retardant material exceeds an early warning value of battery thermal runaway;
if the battery temperature of the battery energy storage system containing the flame retardant material exceeds the early warning value of the thermal runaway of the battery, the battery cluster is separated from the energy storage converter, and then fire is extinguished according to a fire control strategy;
the flame retardant material is arranged between adjacent battery modules of the battery;
the thickness of the flame retardant material is determined by the following procedure:
a=m·Q/W
wherein a is the thickness of the flame retardant material, and the unit is: mm; m is the mass of the battery, unit: kg; q is the heat productivity of the battery in unit: MJ/kg; w is the consumption of the heat insulation material, and the unit is: MJ/mm;
if the battery temperature exceeds the early warning value of battery thermal runaway, the specific method for extinguishing fire according to the fire control strategy after the battery cluster is separated from the energy storage converter is as follows: if the temperature of the battery containing the flame-retardant material exceeds the early warning value of thermal runaway of the battery, dividing a fire extinguishing area into a battery fire extinguishing area and an electric fire extinguishing area after the battery cluster is separated from the energy storage converter; if fire occurs in the electric fire-fighting area, the heptafluoropropyl fire-extinguishing agent is adopted to extinguish the fire, and the battery fire-fighting area is adopted to extinguish the fire by adopting a fire-extinguishing medium;
the early warning value of the thermal runaway of the battery is determined by the following steps:
and simulating a process when the battery module is in thermal runaway by adopting an electric-thermal coupling model, and if the temperature in the battery module is in a peak value, entering a heating process, wherein the peak value is used as an early warning value of the thermal runaway of the battery.
2. The integrated security management method of claim 1, wherein a temperature rise rate during a temperature rise process is greater than 5 ℃/min.
3. The integrated safety management method according to claim 1, wherein the electric fire area detects whether a fire occurs through smoke and temperature sensing.
4. The integrated safety management method according to claim 1, wherein the battery fire area detects whether a fire occurs through a fire detection pipe.
5. The integrated safety management method according to claim 4, wherein the reburning inhibitor enters the battery containing the flame-retardant material through the fire-detecting tube after the fire-detecting tube breaks down and the fire extinguishing medium in the fire-detecting tube extinguishes the open fire in the fire-detecting region of the battery.
6. An integrated security management apparatus, comprising:
the battery temperature measuring module is used for measuring the battery temperature of the battery energy storage system, which contains the flame retardant material;
the battery temperature judging module is used for judging whether the battery temperature of the battery energy storage system containing the flame retardant material exceeds an early warning value of battery thermal runaway;
the fire extinguishing module is used for extinguishing fire according to a fire control strategy after the battery cluster is separated from the energy storage converter if the battery temperature of the battery energy storage system containing the flame retardant material exceeds an early warning value of battery thermal runaway;
the flame retardant material is arranged between adjacent battery modules of the battery;
the thickness of the flame retardant material is determined by the following procedure:
a=m·Q/W
wherein a is the thickness of the flame retardant material, and the unit is: mm; m is the mass of the battery, unit: kg; q is the heat productivity of the battery in unit: MJ/kg; w is the consumption of the heat insulation material, and the unit is: MJ/mm;
if the battery temperature exceeds the early warning value of battery thermal runaway, the specific method for extinguishing fire according to the fire control strategy after the battery cluster is separated from the energy storage converter is as follows: if the temperature of the battery containing the flame-retardant material exceeds the early warning value of thermal runaway of the battery, dividing a fire extinguishing area into a battery fire extinguishing area and an electric fire extinguishing area after the battery cluster is separated from the energy storage converter; if fire occurs in the electric fire-fighting area, the heptafluoropropyl fire-extinguishing agent is adopted to extinguish the fire, and the battery fire-fighting area is adopted to extinguish the fire by adopting a fire-extinguishing medium;
the early warning value of the thermal runaway of the battery is determined by the following steps:
and simulating a process when the battery module is in thermal runaway by adopting an electric-thermal coupling model, and if the temperature in the battery module is in a peak value, entering a heating process, wherein the peak value is used as an early warning value of the thermal runaway of the battery.
7. The integrated security management apparatus of claim 6, wherein a rate of temperature rise during the temperature rise is greater than 5 ℃ per minute.
8. The integrated safety management device of claim 6, wherein the electrical fire area detects whether a fire is occurring through smoke and temperature sensing.
9. The integrated safety management device of claim 6, wherein the battery fire area detects whether a fire is occurring through a fire detection tube.
10. The integrated safety management device of claim 6, wherein the reburning inhibitor enters the battery containing the flame retardant material through the fire probe after the fire extinguishing medium in the fire probe extinguishes the open fire in the case of a fire in the fire-fighting area of the battery.
11. A battery energy storage system, comprising:
a battery cluster including a battery module;
the flame retardant material is arranged between the adjacent battery modules and is used for isolating the battery clusters and delaying fire; and
the integrated safety management device of any one of claims 6-10, the integrated safety management device being connected to a battery cluster;
the thickness of the flame retardant material is determined by the following procedure:
a=m·Q/W
wherein a is the thickness of the flame retardant material, and the unit is: mm; m is the mass of the battery, unit: kg; q is the heat productivity of the battery in unit: MJ/kg; w is the consumption of the heat insulation material, and the unit is: MJ/mm.
12. A computer device, characterized in that it comprises a memory and a processor, said memory having stored thereon a computer program executable on said processor, said computer program implementing the integrated security management method according to any of claims 1-5 when executed by said processor.
13. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, causes the processor to perform the integrated security management method of any of claims 1-5.
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