CN114618099A - Energy storage system and control method - Google Patents
Energy storage system and control method Download PDFInfo
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- CN114618099A CN114618099A CN202011439628.3A CN202011439628A CN114618099A CN 114618099 A CN114618099 A CN 114618099A CN 202011439628 A CN202011439628 A CN 202011439628A CN 114618099 A CN114618099 A CN 114618099A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000007789 gas Substances 0.000 claims description 126
- 239000000779 smoke Substances 0.000 claims description 13
- 239000002341 toxic gas Substances 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 11
- 230000004044 response Effects 0.000 claims description 3
- 230000011664 signaling Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 239000007921 spray Substances 0.000 description 6
- 230000002457 bidirectional effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010892 electric spark Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C35/00—Permanently-installed equipment
- A62C35/58—Pipe-line systems
- A62C35/68—Details, e.g. of pipes or valve systems
-
- 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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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire Alarms (AREA)
Abstract
The application discloses energy storage system and control method, this energy storage system includes: the tail end of the fire fighting pipeline is provided with a second valve; the other end of the fire fighting pipeline is provided with at least one fire fighting branch pipe, and the at least one fire fighting branch pipe is communicated with the fire fighting pipeline; a first air exchange device; the second air interchanger comprises an air interchanging branch pipe, and the tail end of the air interchanging branch pipe is provided with a first valve and a first fan; the air exchange branch pipe is positioned between the second valve and the fire branch pipe and is communicated with the fire pipeline; a fire detector; a gas detector; and the controller is electrically connected with the first air interchanger, the second valve, the first fan, the fire detector and the gas detector respectively. This scheme is through opening and closing of the second valve of control on the fire control pipeline to and the second breather with the fire control pipeline intercommunication, can realize that the fire control pipeline both can be used for the fire control, can be used for the exhaust again, has saved the piping erection space.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to an energy storage system and a control method.
Background
Lithium cell can produce trace combustible gas in normal operating process among the current energy storage system, and before the battery thermal runaway takes place, the volume that produces combustible gas can increase by a wide margin. When the combustible gas reaches the explosion limit, it is very easy to cause a fire and explode.
In the prior art, a lithium battery in an energy storage system can release trace combustible gas during normal operation, can release a large amount of combustible gas during thermal runaway, and is very easy to explode.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide an energy storage system and a control method.
In a first aspect, the present invention provides an energy storage system comprising:
the tail end of the fire pipeline is provided with a second valve; the other end of the fire fighting pipeline is provided with at least one fire fighting branch pipe, and the at least one fire fighting branch pipe is communicated with the fire fighting pipeline;
a first air exchange device;
the second air interchanger comprises an air interchanging branch pipe, and a first valve and a first fan are arranged at the tail end of the air interchanging branch pipe; the air exchange branch pipe is positioned between the second valve and the fire branch pipe and is communicated with the fire pipeline;
a fire detector;
a gas detector;
and the controller is electrically connected with the first air interchanger, the second valve, the first fan, the fire detector and the gas detector respectively.
In one embodiment, the energy storage system further comprises: the controller is electrically connected with the battery management system to receive the cell voltage and the temperature sent by the battery management system.
In one embodiment, the fire detector includes at least one of a flame detector, a temperature detector, and a smoke detector.
In one embodiment, the gas detector comprises at least one of a combustible gas detector and a toxic gas detector.
In one embodiment, the energy storage system further comprises: the alarm is electrically connected with the controller.
In one embodiment, the energy storage system further comprises: and the communication port is electrically connected with the controller and is used for receiving the control instruction sent by the controller and sending alarm information in response to the control instruction.
In one embodiment, the energy storage system further comprises: and a power supply module.
In one embodiment, the first fan is a bi-directional fan.
In one embodiment, the first venting means comprises at least one third valve.
In a second aspect, the present invention provides a control method for an energy storage system, which is applied to the energy storage system according to the first aspect, and the method includes:
if a first gas signal or a first fire alarm signal or a first electric core signal is received, controlling the second valve to be kept closed, and controlling the first valve, the first fan and the first air interchanger to be opened so that the first air interchanger and the second air interchanger work in a matched mode and complete air interchange of the energy storage system by combining a fire fighting pipeline; the gas first signal is used for indicating that the gas concentration data is greater than a first gas threshold, the fire alarm first signal is used for indicating that the fire alarm data is greater than a first fire alarm threshold, and the battery cell is used for indicating that the battery cell data is greater than a first battery cell threshold;
if a first flame signal is received, the first valve, the second fan and the first air interchanger are controlled to be closed, and the second valve is controlled to be opened, so that the fire fighting of the energy storage system is completed through the fire fighting pipeline; the flame first signal is indicative of a flame alarm.
In one embodiment, after controlling the second valve to remain closed and controlling the first valve, the first fan and the first ventilator to be opened, the method further comprises:
if a second gas signal or a second fire alarm signal or a second battery cell signal is received, controlling the second valve to be kept closed, and controlling the first valve, the first fan and the first air exchange device to be closed; the gas second signal is used for indicating that the gas concentration data is smaller than a second gas threshold, the fire alarm second signal is used for indicating that the fire alarm data is smaller than a second fire alarm threshold, and the battery cell second signal is used for indicating that the battery cell data is smaller than a second battery cell threshold.
In one embodiment, the first valve, the second fan and the first ventilator are controlled to be kept closed, and after the second valve is controlled to be opened, the method further comprises the following steps:
if receiving the flame second signal, controlling the second valve to close, and controlling the first valve, the first fan and the first air interchanger to open until receiving the gas second signal, and controlling the first valve, the first fan, the first air interchanger and the second valve to close; the flame second signal is for indicating the end of the fire and the gas second signal is for indicating that the gas concentration data is less than a second gas threshold.
The embodiment provides an energy storage system and a control method thereof, and the scheme can realize that the fire-fighting pipeline can be used for fire fighting and exhaust by controlling the opening and closing of a second valve on the fire-fighting pipeline and a second air interchanger communicated with the fire-fighting pipeline, thereby saving the cost of a set of special exhaust pipeline and saving the installation space of the pipeline.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of an energy storage system for fire fighting using water according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an energy storage system using gas fire protection according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a path of an energy storage system exhaust provided by an embodiment of the invention;
fig. 4 is a schematic diagram of a fire fighting path of the energy storage system according to the embodiment of the invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described are capable of operation in sequences other than those illustrated or otherwise described herein.
Moreover, the terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or modules is not necessarily limited to those steps or modules explicitly listed, but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In the related art, when the energy storage system is exhausted, an additional set of exhaust system needs to be arranged, so that the space in the energy storage system is occupied, and the vacant space in the energy storage system is reduced.
Based on the defects of the technology, the application provides an energy storage system, which can increase the vacant space in the energy storage system.
Referring to fig. 1 and 2, a schematic structural diagram of an energy storage system 10 according to an embodiment of the present application is shown.
As shown in fig. 1 and 2, an energy storage system 10 may include:
the fire fighting pipeline 12, the end of the fire fighting pipeline 12 is provided with a second valve 121; at least one fire branch 122 is arranged at the other end of the fire fighting pipeline 12, and the at least one fire branch 122 is communicated with the fire fighting pipeline 12;
a first ventilator 13;
a second ventilation device 14; the second ventilator 14 comprises a ventilation branch pipe 141, and a first valve 142 and a first fan 143 are arranged at the end of the ventilation branch pipe 141; the other end of the air exchange branch pipe 141 is arranged between the second valve 121 and the fire branch pipe 122, and the air exchange branch pipe 141 is communicated with the fire fighting pipeline 12;
a fire detector 15;
a gas detector 16;
and the controller 17, wherein the controller 17 is electrically connected with the first ventilator 13, the second valve 121, the first valve 142 and the first fan 143.
Specifically, the energy storage system 10 may include a housing 11 for housing a fire protection device, such as a lithium battery or other energy storage device, as well as energy storage devices, a ventilation device, a detector for detecting various gases, flames, etc. within the housing 11, etc. The housing 11 may be made of a refractory material, and preferably, a refractory explosion-proof material may be used. The size of the housing 11 may be set based on, for example, the size and number of lithium batteries or other energy storage devices. The housing 11 may have a cubic structure, a hexahedral structure, or other structures, which is not limited herein.
The fire fighting pipe 12 is disposed inside the housing 11. The fire fighting pipe 12 is used for piping material for transporting fire fighting water (water fire fighting as shown in fig. 1), gas (gas fire fighting as shown in fig. 2), or other fire fighting medium. The fire fighting pipe 12 needs to have good pressure resistance, corrosion resistance, high temperature resistance, strong protection capability, etc., and the fire fighting pipe 12 may be made of materials such as, but not limited to, ductile cast iron pipes, copper pipes, stainless steel pipes, alloy pipes, composite pipes, and plastic pipes.
At least one fire branch 122 is disposed on fire conduit 12, and each fire branch 122 is in communication with fire conduit 12. The fire branch pipes 122 need to have good pressure resistance, corrosion resistance and high temperature resistance, and the fire branch pipes 122 may be made of materials such as, but not limited to, ductile cast iron pipes, copper pipes, stainless steel pipes, alloy pipes, composite pipes and plastic pipes. It will be appreciated that the end of each fire branch 122 is provided with a sprinkler, which may be an open sprinkler. The fire branch 122 and the spray head can be widely distributed on each surface near the battery module, and can cover each battery module area in the energy storage system.
A second valve 121 is provided in the fire fighting pipeline 12 for controlling whether fire fighting water (water fire fighting) or fire fighting gas (gas fire fighting) is supplied. It should be noted that the second valve 121 is an electrically operated valve, and can be opened or closed remotely by the controller 17, or manually by a person, and can feed back a current state signal of the second valve, so that the second valve has high sealing performance. The second valve 121 may employ a ball valve, a butterfly valve, a solenoid valve, etc. When the second valve 121 is opened, fire-fighting water or fire-fighting gas may be supplied through the fire fighting pipe 12 into the fire branch 122. The degree to which the second valve 121 is opened is determined according to the diameter of the fire fighting pipe 12 and the amount of fire fighting water or fire fighting air.
The first ventilator 13 and the second ventilator 14 are used to ventilate the inside of the housing 11. When the density of the toxic gas, the combustible gas and other harmful gases inside the housing 11 reaches a corresponding threshold value (the threshold value can be determined according to different gases or actual conditions), or reaches a certain time (the time length can be determined according to actual conditions), the first ventilation device 13 and the second ventilation device 14 can work in a mutually matched mode, one of the first ventilation device and the second ventilation device delivers gas to the inside of the housing 11, and the other one outputs the gas inside the housing 11 outwards so as to reduce the density of the toxic gas, the combustible gas and other harmful gases inside the housing 11. Wherein, the first ventilation device 13 can be arranged on one side wall of the housing 11; the second ventilation device 14 may be disposed on the other side wall of the housing 11.
Optionally, the first ventilation device 13 may comprise at least one third valve. It should be noted that the third valve is an electrically operated valve, and may be opened or closed by remote control via the controller 17, or may be opened or closed manually by a person. The third valve can adopt an electric ball valve, a butterfly valve, an electromagnetic valve and the like. When the third valve is opened, the gas inside the housing 11 may be discharged, or the external gas may be introduced into the interior of the housing 11. The number of third valves may be determined based on the battery compartment volume (the battery compartment volume is the remaining space inside the housing, which may be expressed by the following equation: the battery compartment volume is the volume of the housing-the volume of the battery-the volume of the rest of the equipment inside) and the number. The mounting position of the third valve can be determined according to the density characteristics of the combustible gas, the toxic gas and other harmful gases in the shell 11 and the layout of the battery compartment body. It will be appreciated that the first air interchanger 13 may also include a second air mover, the second air mover being electrically connected to the controller 17, and the controller 17 being capable of remotely controlling the rotational direction and speed of the second air mover. It should be noted that the rotation direction of the second fan is determined in conjunction with the operating state of the second ventilator 14, and the rotation speed of the second fan is determined by the density of the toxic gas or the harmful gas such as the combustible gas inside the casing 11.
The second fan can adopt a bidirectional fan, namely two modes of forced exhaust and forced air supply can be realized, and the function is strong. The second fan can adopt an explosion-proof bidirectional fan, the explosion-proof bidirectional fan cannot generate electric sparks during operation, the risk that the electric sparks generated during operation of a common fan ignite combustible gas in the shell 11 can be prevented, and therefore the safety of the exhaust process and the danger of exhaust operation are guaranteed. It should be noted that, when there are a plurality of third valves, each third valve may be connected to one second fan, or part of the third valves may be connected to the second fans, which is not limited herein.
The second ventilation device 14 includes a ventilation branch pipe 141, the ventilation branch pipe 141 is communicated with the fire fighting pipeline 12, the ventilation branch pipe 141 needs to have good pressure resistance, corrosion resistance and high temperature resistance, and the ventilation branch pipe 141 can be made of materials such as, but not limited to, ductile iron, copper, stainless steel, alloy, composite and plastic pipes.
The end of the air exchange branch pipe 141 is provided with a first valve 142 and a first fan 143, the first fan 143 can adopt a bidirectional fan, namely two modes of forced exhaust and forced air supply can be realized, the first fan 143 can adopt an explosion-proof bidirectional fan, the exhaust operation is ensured not to generate danger, and the exhaust process is safe. The first valve 142 is used to control whether to perform the exhaust or the intake. The first valve 142 is an electric valve, can be opened or closed by remote control of the controller 17, can also be opened or closed manually by a person, can feed back a current state signal of the first valve, and has high tightness. The first valve 142 may be an electric ball valve, a butterfly valve, a solenoid valve, or the like. When the first valve 142 is opened, the gas delivered by the first fan 143 will enter the fire fighting pipeline 12 or be output from the fire fighting pipeline 12 through the first valve 142.
It should be noted that a plurality of air change branch pipes 141 may be provided according to actual requirements, each air change branch pipe 141 is provided with one first fan 143, each first fan 143 may correspond to one first valve 142, or a plurality of first fans 143 or all first fans 143 may correspond to one first valve 142.
The branch ventilation pipe 141 is located between the second valve 121 and the branch fire fighting pipe 122, and a first valve 142 is provided at the end of the branch ventilation pipe 141. When the second valve 121 on the fire fighting pipeline 12 is opened and the first valve 142 on the air change branch 141 is closed, the fire fighting pipeline 12 is used for fire fighting, whereas when the second valve 121 on the fire fighting pipeline 12 is closed and the first valve 142 on the air change branch 141 is opened, the fire fighting pipeline 12 is used for air change.
A fire detector 15 is installed inside the housing 11, and the fire detector 15 is used for fire detection inside the housing 11. Optionally, the fire detector 15 may include, but is not limited to, at least one of a flame detector, a temperature detector, a smoke detector. The flame detector is used for detecting flame inside the housing 11, the temperature detector is used for detecting temperature inside the housing 11, and the smoke detector is used for detecting smoke inside the housing 11. The fire detector 15 may compare the detected flame and/or temperature and/or smoke with stored thresholds for each detector and then send the results of the determination to the controller 17. The fire detector 15 may also send detected flame and/or temperature and/or smoke data directly to the controller 17, and the controller 17 may make a comparison between the received data and its stored thresholds.
A gas detector 16 is installed inside the housing 11, and is used for detecting the concentration of combustible gas and toxic gas inside the housing 11, such as combustible gas of hydrogen, CO, CH, and the like, and the concentration of toxic gas, which will be collectively referred to as harmful gas. Optionally, the gas detector 15 may include, but is not limited to, a gas detector including at least one of a combustible gas detector, a toxic gas detector. The combustible gas detector can be a single combustible gas detector, such as a hydrogen detector and a carbon monoxide detector, or can be a mixed gas detector, such as a mixed gas detector, wherein the hydrogen detector is used for detecting the hydrogen concentration inside the shell 11, and the carbon monoxide detector is used for detecting the carbon monoxide concentration inside the shell 11. The gas detector 16 may compare the detected various harmful gases with the stored threshold values of the respective detectors, and then transmit the result of the judgment to the controller 17. The gas detector 16 may also directly send the detected various harmful gas data to the controller 17, and the controller 17 compares the received data with the stored threshold values thereof for judgment.
In this application embodiment, survey the concentration of the inside harmful gas of shell through gas detector, when harmful gas concentration is higher than the threshold value, control second valve is closed, and control first valve and first breather open to realize the inside taking a breath of shell through the fire control pipeline. When detecting the inside fire that sends of shell through fire detector, control second valve and open, control first valve and first breather and close to realize the inside fire control of shell through the fire control pipeline. The fire-fighting pipeline can be used for fire fighting and exhaust, so that the cost of a set of special exhaust pipeline is saved, and the pipeline installation space is saved.
In addition, in order to guarantee the fire extinguishing effect, the fire branch pipes and the spray heads are widely distributed on all surfaces near the battery modules, the number of the fire branch pipes and the fire branch heads are large, exhaust air and exhaust air by reverse utilization of exhaust, and can ensure that all environments near the battery modules can be exhausted.
In one embodiment, the controller may also be electrically connected to a Battery Management System (BMS) to receive the cell voltage and temperature transmitted by the BMS. The BMS is a link between the battery and the user, and the BMS may or may not be a component of the energy storage system as long as the monitored cell voltage and temperature can be sent to the controller, and is not limited herein.
In one embodiment, energy storage system 10 further includes an alarm 18, and alarm 18 is electrically connected to controller 17. The alarm 18 may be mounted outside the housing 11 to draw the attention of surrounding personnel when the alarm 18 sounds an alarm. Alternatively, the alarm 18 may be an audible and visual alarm, including an alarm bell and an alarm lamp, which can draw the attention of surrounding personnel.
In one embodiment, energy storage system 10 further includes: and the communication port 19, the communication port 19 is electrically connected with the controller 17, and the communication port 19 is used for receiving the control instruction sent by the controller 17 and sending alarm information in response to the control instruction. The communication ports 19 may include, but are not limited to, one or a combination of the following: ethernet port, WIFI port, GPRS port, Zigbee port.
In one embodiment, energy storage system 10 further includes: and the power supply module 20 is used for supplying power to all valves, fans, controllers, detectors and the like which need electricity. Optionally, the power module 20 may include a conventional power supply and an uninterruptible power supply, and the uninterruptible power supply may continuously supply power to the valve, the fan, the controller, the detector, and the like under abnormal conditions such as a fire and after the interruption of the conventional power supply, so as to ensure that the valve, the fan, the controller, the detector, and the like can normally operate under the abnormal conditions such as a fire and when the battery is out of control due to heat.
It should be noted that, the harness system required in all the electrical connections may be a fire-resistant harness, which may ensure that the harness system may work normally under the conditions of thermal runaway of electric heating, fire, etc.
Taking the energy storage system shown in fig. 1 as an example of water fire protection, one end of the fire branch 122 is connected to the fire pipeline 12, and the other end is provided with a spray head covering each battery module area inside the energy storage system. When the energy storage system is in a normal state, the first fan 143 does not work, the first valve 142, the second valve 121 and the third valve are all kept in a closed state, and the fire detector 15, the gas detector 16 and the controller 17 are kept in operation in real time, wherein the fire detector 15 can detect the temperature and/or smoke and/or flame inside the housing 11, the gas detector 16 can detect the concentration of toxic gas and/or combustible gas inside the housing 11, and the controller 17 receives signals of the fire detector 15 and the gas detector 16 in real time and makes a judgment to control the opening or closing of the first fan, the first valve, the second valve and the first ventilation device.
A control method of an energy storage system, which is applied to the energy storage system of any of the above embodiments, may include:
if a first gas signal or a first fire alarm signal or a first battery core signal is received, controlling the second valve to be kept closed, and controlling the first valve, the first fan and the first air interchanger to be opened so that the first air interchanger and the second air interchanger work in a matched mode and complete air interchange of the energy storage system in combination with a fire fighting pipeline; the gas first signal is used for indicating that the gas concentration data is greater than a first gas threshold, the fire alarm first signal is used for indicating that the fire alarm data is greater than a first fire alarm threshold, and the battery cell is used for indicating that the battery cell data is greater than a first battery cell threshold;
if a first flame signal is received, the first valve, the second fan and the first air interchanger are controlled to be closed, and the second valve is controlled to be opened, so that the fire fighting of the energy storage system is completed through a fire fighting pipeline; the flame first signal is indicative of a flame alarm.
Specifically, the gas concentration data refers to the monitored gas concentration, and may include a combustible gas concentration, a toxic gas concentration, a mixed gas concentration, and the like, the first gas threshold may be set according to actual requirements, and the first gas threshold may include a combustible gas threshold, a toxic gas threshold, a mixed gas threshold, and the like corresponding to the gas concentration, and is a gas concentration critical value that may be explosive or otherwise poisoned.
The first fire alarm signal refers to monitored secondary fire alarm data and can include ambient temperature, smoke concentration and the like, the first fire alarm threshold value can be set according to actual requirements, the first fire alarm threshold value can include a temperature threshold value, a smoke threshold value and the like corresponding to the secondary fire alarm data, and the first fire alarm threshold value is a temperature or smoke critical value where a fire disaster possibly occurs.
The first electric core signal refers to monitored electric core data, and may include electric core voltage, temperature, and the like, the first electric core threshold may be set according to actual requirements, and the first electric core threshold may include an electric core voltage threshold, an electric core temperature threshold, and the like corresponding to the electric core data, and is an electric core temperature or an electric core voltage critical value at which an explosion may occur. Illustratively, the cell voltage threshold is 1.5V and the cell temperature threshold is 100 ℃.
The first signal of flame means that flame is detected and a flame alarm signal is sent out.
In one embodiment, after controlling the second valve to remain closed and controlling the first valve, the first fan and the first ventilator to open, the method further comprises:
if a second gas signal or a second fire alarm signal or a second battery cell signal is received, controlling the second valve to be kept closed, and controlling the first valve, the first fan and the first air exchange device to be closed; the gas second signal is used for indicating that the gas concentration data is smaller than a second gas threshold, the fire alarm second signal is used for indicating that the fire alarm data is smaller than a second fire alarm threshold, and the battery core second signal is used for indicating that the battery core data is smaller than a second battery core threshold.
Specifically, the second gas signal, the second gas threshold, the second fire alarm signal, the second fire alarm threshold, the second electric core signal, and the second electric core threshold correspond to the first gas signal, the first gas threshold, the first fire alarm signal, the first fire alarm threshold, the first electric core signal, and the first electric core threshold, respectively, the second gas threshold is a critical value at which the gas concentration belongs to a normal range, the second fire alarm threshold is a critical value at which the temperature or smoke in the housing is normal, and the second electric core threshold is a critical value at which the temperature or voltage of the electric core is normal. The first gas threshold is greater than or equal to the second gas threshold, the first fire alarm threshold is greater than or equal to the second fire alarm threshold, and the first cell threshold is greater than or equal to the second cell threshold.
In one embodiment, the first valve, the second fan and the first air interchanger are controlled to be closed, and after the second valve is controlled to be opened, the method further comprises the following steps:
if receiving the flame second signal, controlling the second valve to close, and controlling the first valve, the first fan and the first air interchanger to open until receiving the gas second signal, and controlling the first valve, the first fan, the first air interchanger and the second valve to close; the flame second signal is for indicating the end of the fire and the gas second signal is for indicating that the gas concentration data is less than a second gas threshold.
Specifically, the second signal of the flame corresponds to the first signal of the flame, and the second signal of the flame is a signal that the flame is not monitored.
As shown in fig. 3, when the gas detector 16 detects that the concentration of harmful gas such as toxic gas or combustible gas inside the housing 11 reaches a set lower concentration threshold (that is, the first gas threshold is generally 25% as the alarm threshold of combustible gas), the gas detector 16 sends an alarm signal (that is, a first gas signal) to the controller 17, and after the controller 17 receives the alarm signal, when the inside of the housing 11 needs to be ventilated, the controller 17 controls the first valve 142 and the third valve to be opened, controls the alarm 18 to operate and alarm, and sends an alarm message to a worker through the communication port 19. Assuming that the first ventilator 13 supplies air to the inside of the housing 11, the controller 13 controls the first fan 143 to start to draw air to the outside of the housing 11 to generate wind pressure, so as to drive fresh air to enter the inside of the housing 11 from the third valve, and the harmful gas enters the fire fighting pipeline 12 through the nozzle of the fire fighting branch pipe 122 (in fig. 3, the harmful gas enters the fire fighting pipeline through a part of the nozzle), passes through the exhaust branch pipe 141 and the first valve 142, and is discharged to the outside of the housing 11; when the concentration of the harmful gas falls below the set threshold (i.e. the second gas threshold, for example, the set threshold of combustible gas may be 10%), the controller 17 controls the first fan 143 to stop working, and controls the first valve 142 and the third valve, and the alarm 18 to close. It will be appreciated that in the event that the first air exchange means 13 is used to supply air to the interior of the enclosure 11, and the first air exchange means 13 comprises a second fan, the controller 17 controls the second fan and the first fan 143 to be reversed in direction to ensure that the second air exchange means 14 exhausts the air from the interior of the enclosure 11.
With continued reference to fig. 3, when the controller 17 receives the alarm signals (i.e., the first fire alarm signal) from the temperature detector and the smoke detector in the fire detector 17, the controller 17 controls both the first valve 142 and the third valve to open, controls the alarm 18 to alarm, and sends the alarm information to the staff through the communication port 19. The working processes of the first valve 142 and the third valve refer to the above embodiments, and are not described herein again.
When the controller 17 receives a first cell signal (i.e., for example, the cell temperature is greater than 100 ℃ and the cell voltage is less than 1.5V) sent by the BMS, the controller 17 controls the first valve 142 and the third valve to be opened, controls the alarm 18 to alarm, and sends alarm information to a worker through the communication port 19. The working processes of the first valve 142 and the third valve refer to the above embodiments, and are not described herein again.
As shown in fig. 4, when the controller 17 receives an alarm signal (i.e., a first signal of a fire) from a flame detector in the fire detector 17, the controller 17 controls the second valve 121 to open, fire water or gas enters the interior of the housing 11 through the fire fighting pipe 12, sprays water through the spray heads of the respective fire branch pipes 122 to start fire extinguishing (a part of the spray heads are shown in fig. 4), and controls the alarm 18 to operate and alarm through the controller 17, and sends an alarm message to the worker through the communication port 19. When the fire extinguishing (that is, the second signal of the flame is received) is completed and the temperature is reduced, the second valve 121 is controlled to be closed, the first valve 142 and the third valve are controlled to be opened (if the fire burns out the lines of the conventional power supply and the uninterruptible power supply, the second valve 121 can be manually closed, the first valve 142 and the third valve can be manually opened), the first fan 143 is opened (if the fire burns out the lines of the conventional power supply and the uninterruptible power supply, the external power supply is provided for the first fan 143), air is sucked out of the shell 11 for a period of time (the specific time duration can be determined according to the exhaust rate), and after harmful gas possibly existing in the shell 11 is exhausted, people enter the shell for treatment again.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (12)
1. An energy storage system, comprising:
the tail end of the fire fighting pipeline is provided with a second valve; the other end of the fire fighting pipeline is provided with at least one fire fighting branch pipe, and the at least one fire fighting branch pipe is communicated with the fire fighting pipeline;
a first air exchange device;
the second air interchanger comprises an air interchanging branch pipe, and a first valve and a first fan are arranged at the tail end of the air interchanging branch pipe; the air exchange branch pipe is positioned between the second valve and the fire branch pipe, and the air exchange branch pipe is communicated with the fire fighting pipeline;
a fire detector;
a gas detector;
and the controller is respectively and electrically connected with the first air interchanger, the second valve, the first fan, the fire detector and the gas detector.
2. The energy storage system of claim 1, wherein the controller is electrically connected to a battery management system to receive the cell voltage and the temperature transmitted by the battery management system.
3. The energy storage system of claim 1, wherein the fire detector comprises at least one of a flame detector, a temperature detector, a smoke detector.
4. The energy storage system of claim 1, wherein the gas detector comprises at least one of a combustible gas detector, a toxic gas detector.
5. The energy storage system of any of claims 1-3, further comprising: and the alarm is electrically connected with the controller.
6. The energy storage system of any of claims 1-3, further comprising: the communication port is electrically connected with the controller and used for receiving a control instruction sent by the controller and sending alarm information in response to the control instruction.
7. The energy storage system of any of claims 1-3, further comprising: and a power supply module.
8. The energy storage system of any of claims 1-3, wherein the first fan is a bi-directional fan.
9. The energy storage system of any of claims 1-3, wherein the first air exchange device comprises at least one third valve.
10. A control method for an energy storage system, applied to the energy storage system according to any one of claims 1 to 9, the method comprising:
if a first gas signal or a first fire alarm signal or a first electric core signal is received, controlling the second valve to be kept closed, and controlling the first valve, the first fan and the first air interchanger to be opened so that the first air interchanger and the second air interchanger work in a matched mode and complete air interchange of the energy storage system by combining a fire fighting pipeline; the gas first signal is used for indicating that gas concentration data is greater than a first gas threshold, the fire alarm first signal is used for indicating that fire alarm data is greater than a first fire alarm threshold, and the battery cell is used for indicating that battery cell data is greater than a first battery cell threshold;
if a first flame signal is received, controlling the first valve, the second fan and the first air interchanger to be kept closed, and controlling the second valve to be opened so as to finish the fire fighting of the energy storage system through the fire fighting pipeline; the flame first signal is for indicating a flame alarm.
11. The method of claim 10, wherein after controlling the second valve to remain closed and controlling the first valve, the first fan, and the first ventilator to open, the method further comprises:
if a second gas signal or a second fire alarm signal or a second battery cell signal is received, controlling the second valve to be kept closed, and controlling the first valve, the first fan and the first air exchange device to be closed; the gas second signal is used for indicating that the gas concentration data is smaller than a second gas threshold, the fire alarm second signal is used for indicating that the fire alarm data is smaller than a second fire alarm threshold, and the battery cell second signal is used for indicating that the battery cell data is smaller than a second battery cell threshold.
12. The method of claim 10, wherein the controlling the first valve, the second fan, and the first air interchanger remain closed, and wherein the controlling the second valve opens further comprises:
if receiving a flame second signal, controlling the second valve to close, and controlling the first valve, the first fan and the first air interchanger to open until receiving a gas second signal, and controlling the first valve, the first fan, the first air interchanger and the second valve to close; the flame second signal is for indicating the end of the fire and the gas second signal is for indicating that the gas concentration data is less than a second gas threshold.
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