Fire-fighting detection and fire extinguishing method and system for energy storage equipment

Abstract

The invention provides a fire-fighting detection and fire extinguishing method and system for energy storage equipment, and the method and system can receive a fire alarm signal sent by a detector disposed in a battery pack, determine a corresponding fire alarm level according to the fire alarm signal, and give an alarm when the fire alarm level is severe. The multi-stage liquid-gas sharing control switch on the liquid-gas sharing pipeline between the fire extinguishing gas storage device and the battery pack is controlled to be turned on, so that the fire extinguishing gas is conveyed into the battery pack through the liquid-gas sharing pipeline and is sprayed and extinguished through the liquid-gas sharing spraying device; the fire extinguishing liquid input control switch is controlled to be turned on, so that the fire extinguishing liquid is injected into the battery pack through the liquid-gas shared pipeline to immerse the battery pack, and the fire extinguishing liquid is extinguished under the condition that a fire alarm signal of a detector arranged in the energy storage equipment or the battery pack is continuously received in a preset first time period; the liquid-gas sharing main control switch on the liquid-gas sharing main pipeline is controlled to be turned on, so that fire extinguishing liquid is sprayed into the whole energy storage equipment through the liquid-gas sharing main pipeline, finally immersion is achieved, the gas-liquid dual-purpose pipeline design is achieved, the design difficulty of a fire extinguishing pipeline in the energy storage equipment is reduced, and the fire extinguishing efficiency is improved. The fire extinguishing liquid can be input into the battery pack with fire through the liquid-gas shared pipeline for fire extinguishing, the initial and later fire of the battery pack is accurately extinguished, the fire extinguishing effect is better, and the cost of a fire extinguishing system is reduced.

Description

Technical Field

[0001] The present invention relates to the field of energy storage safety technology, and in particular to a fire detection and fire extinguishing method and system for energy storage equipment. Background Art

[0002] With the development of the energy storage industry, the energy storage safety of energy storage equipment such as battery energy storage containers has received more and more attention from the industry, and the fire protection system has become an indispensable part of energy storage equipment. Although the design of fire protection systems is becoming more and more mature, the fire protection design standards mainly serve environments such as buildings and equipment rooms, and are difficult to be directly used in the energy storage industry. Especially with the widespread application of liquid-cooled battery packs in the energy storage industry, since the battery cells are wrapped in battery packs with IP65 or even higher protection levels, the fire protection treatment of energy storage equipment has a large delay, which makes it difficult to meet the real-time fire protection requirements of energy storage equipment.

[0003] Therefore, a technical solution is needed that can detect and respond to the fire safety of energy storage equipment in real time. Summary of the invention

[0004] One purpose of the present application is to provide a fire detection and fire extinguishing method and system for energy storage equipment, so as to solve the problem that it is difficult to timely detect the fire safety of energy storage equipment and handle fires under the existing technology.

[0005] To achieve the above objectives, some embodiments of the present application provide a fire detection and fire extinguishing method for an energy storage device, the method comprising:

[0006] Receiving a fire alarm signal sent by a detector arranged inside the battery pack;

[0007] According to the fire alarm signal, determine the corresponding fire alarm level, which includes ordinary and serious;

[0008] When the fire alarm level is serious, the multi-stage liquid-gas common control switch on the liquid-gas common pipeline between the fire extinguishing gas storage device and the battery pack is controlled to be turned on, so that the fire extinguishing gas is transported to the inside of the battery pack through the liquid-gas common pipeline and sprayed through the liquid-gas common spray device to extinguish the fire;

[0009] In the case of fire spreading inside the battery pack, the fire extinguishing liquid input control switch is controlled to be turned on, so that the fire extinguishing liquid is poured into the battery pack through the liquid-gas common pipeline to immerse the battery pack;

[0010] When fire alarm signals from detectors disposed inside the energy storage device or the battery pack are continuously received during a preset first time period, the liquid-gas common main control switch on the liquid-gas common trunk pipeline is controlled to be turned on, so that the fire extinguishing liquid is sprayed on the interior of the entire energy storage device through the liquid-gas common trunk pipeline, ultimately achieving immersion.

[0011] Furthermore, the detector includes a combination of the following: a combustible gas sensor, a temperature sensing sensor, and a smoke sensing sensor.

[0012] Furthermore, according to the fire alarm signal, the corresponding fire alarm level is determined, including:

[0013] In the case where a fire alarm signal is sent by any one of the combustible gas sensor, the temperature sensing sensor and the smoke sensing sensor, the fire alarm level is determined to be normal; or

[0014] In the case where the fire alarm signal is issued by at least two of the combustible gas sensor, the temperature sensing sensor and the smoke sensing sensor, the fire alarm level is determined to be severe.

[0015] Furthermore, the method further comprises:

[0016] When the fire alarm level is normal, the alarm bell is activated and a normal fire alarm signal is output; or

[0017] When the fire alarm level is serious, the sound and light alarm and the gas release indicator light are activated and a serious fire alarm signal is output.

[0018] Furthermore, the multi-stage liquid-gas shared control switch includes: a switch for controlling the fire extinguishing gas storage device, a switch for controlling the liquid-gas shared branch pipeline entering the battery pack cluster, and a switch for controlling the liquid-gas shared branch pipeline entering the battery pack in the battery pack cluster.

[0019] Furthermore, in the case of fire spreading inside the battery pack, controlling the fire extinguishing liquid input control switch to be turned on includes:

[0020] When the spraying process of the fire extinguishing gas is completed and the fire alarm signal from the detector inside the battery pack is continuously received during the preset second time period, the fire extinguishing liquid input control switch is controlled to be turned on.

[0021] Some embodiments of the present application also provide a fire detection and fire extinguishing method for an energy storage device, the method comprising:

[0022] Receiving a fire alarm signal sent by a detector installed inside the energy storage device;

[0023] According to the fire alarm signal, determine the corresponding fire alarm level, which includes ordinary and serious;

[0024] When the fire alarm level is serious, the liquid-gas common main control switch on the liquid-gas common trunk pipeline connected to the fire extinguishing gas storage device is controlled to be turned on, so that the fire extinguishing gas is transported to the interior of the energy storage device through the liquid-gas common trunk pipeline and sprayed through the liquid-gas common spray device to extinguish the fire;

[0025] In the event of fire spreading inside the energy storage device, the fire extinguishing liquid input control switch is turned on, so that the fire extinguishing liquid is sprayed throughout the energy storage device through the liquid-gas common trunk pipeline, ultimately achieving immersion.

[0026] Furthermore, the method further comprises:

[0027] When the real-time detection data of the detector exceeds the corresponding preset threshold, the detector sends a corresponding fire alarm signal.

[0028] Furthermore, in the case of fire spreading inside the energy storage device, controlling the fire extinguishing liquid input control switch to open includes:

[0029] When the spraying process of the fire extinguishing gas is completed and the fire alarm signal from the detector inside the energy storage device is continuously received in the preset third time period, the fire extinguishing liquid input control switch is controlled to be turned on.

[0030] Some embodiments of the present application also provide a fire detection and extinguishing system for an energy storage device, the system comprising:

[0031] A fire control device, used to receive a fire alarm signal sent by a detector and determine a corresponding fire alarm level according to the fire alarm signal, and, when the fire alarm level is serious, control the multi-stage liquid-gas common control switch on the liquid-gas common pipeline between the fire extinguishing gas storage device and the battery pack to open, so that the fire extinguishing gas is transported to the inside of the battery pack through the liquid-gas common pipeline and sprayed through the liquid-gas common spray device to extinguish the fire; it is also used to control the fire extinguishing liquid input control switch to open when the fire spreads inside the battery pack, so that the fire extinguishing liquid is poured into the battery pack through the liquid-gas common pipeline to immerse the battery pack; it is also used to control the liquid-gas common main control switch on the liquid-gas common trunk pipeline to open when the fire alarm signal from the detector arranged inside the energy storage device or inside the battery pack is continuously received in a preset first time period, so that the fire extinguishing liquid is sprayed to the inside of the entire energy storage device through the liquid-gas common trunk pipeline to finally immerse the entire energy storage device;

[0032] The fire extinguishing liquid access pipeline is provided with a fire extinguishing liquid input control switch, which is connected to the external fire extinguishing liquid input pipeline and is used to input the fire extinguishing liquid into the liquid-gas common trunk pipeline and the liquid-gas common branch pipeline;

[0033] a fire extinguishing gas storage device for storing a fire extinguishing agent for generating fire extinguishing gas;

[0034] A liquid-gas common trunk pipeline is arranged inside the energy storage device and is used to transmit fire extinguishing gas or fire extinguishing liquid when extinguishing a fire in the entire energy storage device;

[0035] A liquid-gas common spraying device is arranged on a liquid-gas common trunk pipeline and a liquid-gas common branch pipeline, and is used to spray fire extinguishing gas or fire extinguishing liquid to extinguish fire;

[0036] A multi-stage liquid-gas common control switch, including a switch for controlling a fire extinguishing gas storage device, a switch for controlling a liquid-gas common branch pipeline entering a battery pack cluster, and a switch for controlling a liquid-gas common branch pipeline entering a battery pack in a battery pack cluster, for receiving a control signal sent by a fire control device and opening and closing according to the control signal;

[0037] A liquid-gas common branch pipeline, one end of which is connected to the liquid-gas common trunk pipeline, and the other end of which is arranged inside the battery pack in the battery pack cluster, and is used to transmit fire extinguishing gas or fire extinguishing liquid when extinguishing a fire in the battery pack;

[0038] The detector is arranged inside the energy storage device and the battery pack, and is used to send a fire alarm signal to the fire control device.

[0039] Compared with the prior art, the solution provided by the present application is capable of receiving a fire alarm signal sent by a detector arranged inside a battery pack, determining a corresponding fire alarm level according to the fire alarm signal, and, when the fire alarm level is serious, controlling a multi-stage liquid-gas common control switch on a liquid-gas common pipeline between a fire extinguishing gas storage device and the battery pack to be turned on, so that the fire extinguishing gas is transported to the inside of the battery pack through the liquid-gas common pipeline and sprayed through a liquid-gas common spray device for fire extinguishing. It is also capable of controlling a fire extinguishing liquid input control switch to be turned on when a fire spreads inside the battery pack, so that the fire extinguishing liquid is poured into the battery pack through the liquid-gas common pipeline. When the battery pack is immersed and the fire alarm signal from the detector arranged inside the energy storage device or the battery pack is continuously received during the preset first time period, the liquid-gas common main control switch on the liquid-gas common trunk pipeline is controlled to be turned on, so that the fire extinguishing liquid is sprayed on the entire energy storage device through the liquid-gas common trunk pipeline, and finally the immersion is achieved, thereby realizing the gas-liquid dual-purpose pipeline design, reducing the difficulty of fire protection pipeline design in the energy storage device, and being able to input the fire extinguishing liquid into the battery pack where the fire has occurred through the liquid-gas common pipeline for fire extinguishing, accurately extinguishing the early and late fires in the battery pack, achieving better fire extinguishing effect, and reducing the cost of the fire protection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0041] Figure 1 A flow chart of a fire detection and fire extinguishing method for an energy storage device is provided for some embodiments of the present application.

[0042] Figure 2A flowchart of another fire detection and fire extinguishing method for an energy storage device provided for some embodiments of the present application.

[0043] Figure 3 A schematic structural diagram of a fire detection and extinguishing system for an energy storage device provided in some embodiments of the present application.

[0044] Figure numerals: 1. Fire control device, 2. Fire extinguishing liquid access pipeline, 3. Fire extinguishing gas storage device, 4. Switch for controlling the liquid and gas common branch pipeline entering the battery pack cluster, 5. Liquid and gas common trunk pipeline, 6. Liquid and gas common injection device, 7. Fire extinguishing liquid control switch, 8. Switch for controlling the fire extinguishing gas storage device, 9. Liquid and gas common branch pipeline, 10. Detector, 11. Switch for controlling the liquid and gas common branch pipeline entering the battery pack in the battery pack cluster. DETAILED DESCRIPTION

[0045] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0046] Here, the fire detection and fire extinguishing method of the energy storage device of the embodiment of the present application is suitable for scenarios where fire monitoring of the energy storage device including the battery pack is performed and fire is extinguished in a timely manner after a fire occurs.

[0047] In this scenario, one or more battery packs in energy storage equipment such as energy storage containers may cause fires due to different fault reasons. Due to the high protection level of the energy storage battery pack, thermal runaway and heat spread occur inside the battery pack, making it impossible to detect the fire in the battery pack in real time. After the fire occurs, the fire extinguishing medium cannot enter the battery pack in the first time, and it is impossible to effectively and accurately extinguish the early and late fires.

[0048] The fire detection and fire extinguishing method for energy storage equipment provided in the embodiment of the present application can receive a fire alarm signal sent by a detector arranged inside a battery pack, determine the corresponding fire alarm level according to the fire alarm signal, and when the fire alarm level is serious, control the multi-stage liquid-gas common control switch on the liquid-gas common pipeline between the fire extinguishing gas storage device and the battery pack to be turned on, so that the fire extinguishing gas is transported to the inside of the battery pack through the liquid-gas common pipeline and sprayed through the liquid-gas common spraying device to extinguish the fire. In addition, when the fire inside the battery pack spreads, control the fire extinguishing liquid input control switch to be turned on, so that the fire extinguishing liquid is injected into the battery pack through the liquid-gas common pipeline. The battery pack is immersed inside the battery pack, and when the fire alarm signal of the detector arranged inside the energy storage device or the battery pack is continuously received during the preset first time period, the liquid-gas common main control switch on the liquid-gas common trunk pipeline is controlled to be turned on, so that the fire extinguishing liquid is sprayed to the inside of the entire energy storage device through the liquid-gas common trunk pipeline, and finally immersion is achieved, thereby realizing a gas-liquid dual-purpose pipeline design, reducing the difficulty of fire-fighting pipeline design in the energy storage device, and being able to input the fire-extinguishing liquid into the battery pack where the fire has occurred through the liquid-gas common pipeline for fire extinguishing, accurately extinguishing the early and late fires in the battery pack, achieving better fire extinguishing effects, and reducing the cost of the fire-fighting system.

[0049] In some embodiments of the present application, a process of a fire detection and extinguishing method for an energy storage device is provided, which can be used to detect and extinguish fires in battery packs in an energy storage device. The execution subject of the method is a fire control device, such as Figure 1 As shown, the method may include the following steps:

[0050] Step S101, receiving a fire alarm signal sent by a detector installed inside the battery pack.

[0051] Here, the fire control device is an electronic device, such as a fire host, which is used to receive the fire alarm signal sent by the detector and control the switch and fire medium on the fire pipe according to the fire alarm signal to achieve fire handling.

[0052] In some embodiments of the present application, a detector is provided inside the battery pack, and the detector is used to detect abnormal conditions of the internal environment of the battery pack, and when there is a possible abnormal fire condition, a corresponding fire alarm signal is sent to a fire control device.

[0053] The detectors arranged inside the battery pack may be a combination of multiple sensors, and the detectors may include but are not limited to: combustible gas sensors, temperature sensors, and smoke sensors. The combustible gas sensor is used to detect the concentration of combustible gas inside the battery pack, and the combustible gas may be, for example, hydrogen, carbon monoxide, etc. The temperature sensor is used to detect the temperature change inside the battery pack. The smoke sensor is used to detect the smoke concentration inside the battery pack.

[0054] In some embodiments of the present application, when the real-time detection data of the detector exceeds the corresponding preset threshold, the detector sends a corresponding fire alarm signal. For example, the temperature sensor compares the real-time detected temperature with the preset temperature threshold. If the real-time temperature is greater than the temperature threshold, the temperature sensor sends a fire alarm signal to the fire control device. Similarly, when the smoke sensor detects that the smoke concentration is greater than the preset smoke concentration threshold in real time, it sends a fire alarm signal to the fire control device.

[0055] Here, different types of detectors have different preset thresholds. For example, the preset threshold corresponding to the temperature sensor is usually 80°C, the preset threshold corresponding to the smoke sensor is usually 0.5dB / m, and the preset threshold corresponding to the combustible gas sensor can be 25%LEL or 50%LEL. The two preset thresholds of combustible gas can correspond to different alarm levels, such as 25%LEL corresponding to the first alarm and 50%LEL corresponding to the second alarm.

[0056] In addition, the detector can also send real-time detection data to the fire control device, which will compare the received real-time detection data with the corresponding preset threshold value to determine whether to generate a fire alarm signal. For example, a combustible gas sensor can send combustible gas concentration data to the fire control device, which will determine whether to generate a fire alarm signal.

[0057] Step S102: determining the corresponding fire alarm level according to the fire alarm signal.

[0058] Here, the fire alarm level can be divided into two levels: ordinary and severe, the ordinary level corresponds to the first level fire alarm, and the severe level corresponds to the second level fire alarm.

[0059] In some embodiments of the present application, when a fire alarm signal is sent by any one of a combustible gas sensor, a temperature sensor, and a smoke sensor, the fire alarm level may be determined as normal.

[0060] Here, the fire control device receives a single fire alarm signal from the detector, which can be sent by any one of the combustible gas sensor, temperature sensor and smoke sensor. At this time, the fire control device determines the fire alarm level as the "normal" level.

[0061] In some embodiments of the present application, when a fire alarm signal is sent by at least two of the combustible gas sensor, the temperature sensing sensor, and the smoke sensing sensor, the fire alarm level is determined to be severe.

[0062] Here, the fire control device receives a composite fire alarm signal from the detector. The composite fire alarm signal can be sent by at least two of the combustible gas sensor, the temperature sensor and the smoke sensor, for example, by the temperature sensor and the smoke sensor. At this time, the fire control device determines the fire alarm level as a "serious" level.

[0063] In some embodiments of the present application, when the fire alarm level is normal, the alarm is activated and a normal fire alarm signal is output.

[0064] In some embodiments of the present application, when the fire alarm level is serious, the sound and light alarm and the gas release indicator light are activated and a serious fire alarm signal is output.

[0065] Here, according to different fire alarm levels, different forms of alarms are issued to remind users, and users can take different fire response measures according to different forms of alarms.

[0066] Step S103, when the fire alarm level is serious, control the multi-stage liquid-gas common control switch on the liquid-gas common pipeline between the fire extinguishing gas storage device and the battery pack to open, so that the fire extinguishing gas is transported to the inside of the battery pack through the liquid-gas common pipeline and sprayed through the liquid-gas common spray device to extinguish the fire.

[0067] Here, the multi-stage liquid-gas shared control switch may include but is not limited to: a switch for controlling a fire extinguishing gas storage device, a switch for controlling a liquid-gas shared branch pipeline entering a battery pack cluster, and a switch for controlling a liquid-gas shared branch pipeline entering a battery pack in a battery pack cluster.

[0068] The fire extinguishing gas storage device is used to store fire extinguishing agents used for fire fighting. The fire extinguishing agents may include but are not limited to heptafluoropropane, perfluorohexanone, etc. After the switch of the fire extinguishing gas storage device is turned on, the fire extinguishing gas can be transported through a preset liquid and gas shared pipeline.

[0069] Here, the liquid-gas common pipeline can be used to transmit fire extinguishing gas, and can also be used to transmit fire extinguishing liquid. The fire extinguishing liquid can be any liquid used for fire extinguishing, such as water.

[0070] In some embodiments of the present application, the liquid-gas common pipeline between the fire extinguishing gas storage device and the battery pack includes a liquid-gas common trunk pipeline and a liquid-gas common branch pipeline. The liquid-gas common trunk pipeline is arranged inside the energy storage device, such as the top plate of the energy storage container. One end of the liquid-gas common branch pipeline is connected to the liquid-gas common trunk pipeline, and the other end is arranged inside the battery pack in the battery pack cluster. The switch arranged on the liquid-gas common branch pipeline includes a switch for controlling the fire extinguishing gas or fire extinguishing liquid to enter the battery pack cluster, and also includes a switch for further controlling the fire extinguishing gas or fire extinguishing liquid to enter the battery pack.

[0071] It can be understood that the multi-stage liquid-gas shared control switch can use any switch controlled by a signal, such as a solenoid valve, etc., and the embodiments of the present application do not impose specific limitations on this.

[0072] Here, the gas pressure is generally 0.2-0.4MPa, the water system pressure is 0.4-1.2MPa, and the liquid-gas common pipeline and liquid-gas common injection device need to be selected and adapted accordingly.

[0073] The fire control device determines that the fire alarm level is serious, that is, at least one battery pack in the energy storage device has caught fire and needs to be extinguished. The fire control device first uses fire extinguishing gas to extinguish the battery pack, so the control switches on the liquid-gas common pipeline from the fire extinguishing gas storage device to the battery pack are all turned on, so that the fire extinguishing gas can reach the battery pack with fire to extinguish the fire. For example, the fire control device drives the relay through the DO signal to trigger the solenoid valve on the liquid-gas common pipeline to open.

[0074] After the fire extinguishing gas can reach the battery pack where the fire is, the liquid-gas common spray device sprays multiple times according to the preset spray mode, spraying the fire extinguishing gas to fill the internal space of the battery pack and reduce the temperature. The liquid-gas common spray device can be any device that can spray gas or liquid, such as a nozzle.

[0075] In some embodiments of the present application, a pre-release countdown of the fire extinguishing gas can also be performed, and after the countdown is completed, the multi-stage liquid-gas common control switch is controlled to be turned on so that the fire extinguishing gas reaches the battery pack. Here, the pre-release countdown is set according to actual needs, for example, it can be 30 seconds.

[0076] Step S104, when the fire inside the battery pack spreads, the fire extinguishing liquid input control switch is controlled to be turned on, so that the fire extinguishing liquid is poured into the battery pack through the liquid-gas common pipeline to immerse the battery pack.

[0077] Here, after spraying the fire extinguishing gas, the fire control device finds that it cannot effectively control the fire inside the battery pack, and the detector installed inside the battery pack still sends a fire alarm signal, then the fire extinguishing liquid is used to extinguish the fire inside the battery pack.

[0078] In some embodiments of the present application, when the injection process of the fire extinguishing gas is completed and the fire alarm signal of the detector inside the battery pack is continuously received in the preset second time period, the fire extinguishing liquid input control switch is controlled to be turned on. Here, the second time period is a period of time pre-set based on actual experience. Since it takes a certain amount of time to control the fire inside the battery pack using the fire extinguishing gas, the detector inside the battery pack should no longer send out a fire alarm signal after the fire is controlled. If the detector continues to send out a fire alarm signal during this time period, it means that the fire has not been effectively controlled and the fire extinguishing liquid needs to be used to control the fire.

[0079] The fire extinguishing liquid input control switch is used to control the input of the fire extinguishing liquid. When it is turned on, the fire extinguishing liquid can be transported to the liquid-gas common pipeline inside the energy storage device, and the battery pack on fire is extinguished and cooled by liquid through the liquid-gas common pipeline opened by the switch, and the battery pack is immersed to achieve fire control. Here, a fire extinguishing liquid trunk pipeline is provided in the energy storage device, and the fire extinguishing liquid input trunk pipeline is connected to the external fire extinguishing liquid pipeline. The fire extinguishing liquid flows from the external fire extinguishing liquid pipeline into the fire extinguishing liquid input trunk pipeline. After the fire extinguishing liquid input control switch is turned on, the fire extinguishing liquid flows into the liquid-gas common pipeline through the fire extinguishing liquid input trunk pipeline, and is poured into the battery pack on fire through the liquid-gas common pipeline to extinguish the fire, and finally the battery pack is immersed.

[0080] Step S105, when the fire alarm signal from the detector arranged inside the energy storage device or the battery pack is continuously received during the preset first time period, the liquid-gas common main control switch on the liquid-gas common trunk pipeline is controlled to be turned on, so that the fire extinguishing liquid is sprayed to the inside of the entire energy storage device through the liquid-gas common trunk pipeline, and finally immersion is achieved.

[0081] The first time period is a period of time pre-set based on actual experience. Since it also takes a certain amount of time to control the fire inside the battery pack using the fire extinguishing liquid, the detector inside the battery pack should no longer send out a fire alarm signal after the fire is controlled. If the detector inside the battery pack continues to send out a fire alarm signal during this time period, and even causes the detector inside the energy storage device to send out a fire alarm signal, it means that the fire inside the battery pack is not only not effectively controlled, but also causes the battery pack to burn through, so that the detector inside the energy storage device also detects the corresponding abnormal condition. Therefore, the entire energy storage device needs to be extinguished to prevent the fire from spreading throughout the energy storage device.

[0082] Here, the liquid-gas shared main control switch is used to control the delivery of fire-extinguishing liquid on the liquid-gas shared trunk pipeline. After it is turned on, the fire-extinguishing liquid reaches the liquid-gas shared injection device through the liquid-gas shared trunk pipeline to spray the entire energy storage device, ultimately achieving immersion of the interior of the energy storage device and controlling the fire to the greatest extent.

[0083] Some embodiments of the present application also provide a process of a fire detection and fire extinguishing method for an energy storage device, which can be used to detect and extinguish fires in energy storage devices. The execution subject of the method is a fire control device, such as Figure 2 As shown, the method may include the following steps:

[0084] Step S201, receiving a fire alarm signal sent by a detector installed inside the energy storage device.

[0085] In some embodiments of the present application, a detector is provided inside the energy storage device, and the detector is used to detect abnormal conditions of the internal environment of the energy storage device, and when there is a possible abnormal fire condition, a corresponding fire alarm signal is sent to a fire control device.

[0086] In some embodiments of the present application, when the real-time detection data of the detector exceeds the corresponding preset threshold, the detector sends a corresponding fire alarm signal.

[0087] Similarly, the processing process of the fire control device receiving the fire alarm signal sent by the detector arranged inside the energy storage device can refer to the processing process in step S101, which will not be repeated here.

[0088] Step S202: determining the corresponding fire alarm level according to the fire alarm signal.

[0089] Here, the fire alarm level can be divided into two levels: ordinary and severe, the ordinary level corresponds to the first level fire alarm, and the severe level corresponds to the second level fire alarm.

[0090] Similarly, the processing process of the fire control device determining the corresponding fire alarm level according to the fire alarm signal can refer to the processing process in step S102, which will not be repeated here.

[0091] Step S203, when the fire alarm level is serious, control the liquid-gas common main control switch on the liquid-gas common trunk pipeline connected to the fire extinguishing gas storage device to turn on, so that the fire extinguishing gas is transported to the interior of the energy storage device through the liquid-gas common trunk pipeline and sprayed through the liquid-gas common spray device to extinguish the fire.

[0092] Similarly, the fire control device controls the liquid-gas common main control switch on the liquid-gas common trunk pipeline connected to the fire extinguishing gas storage device to turn on, so that the fire extinguishing gas is transported to the interior of the energy storage device through the liquid-gas common trunk pipeline and is sprayed and extinguished through the liquid-gas common injection device. The processing process can refer to the processing process in step S103 and will not be repeated here.

[0093] Step S204, when the fire spreads inside the energy storage device, the fire extinguishing liquid input control switch is controlled to be turned on, so that the fire extinguishing liquid is sprayed to the inside of the entire energy storage device through the liquid-gas common trunk pipeline, and finally immersion is achieved.

[0094] In some embodiments of the present application, when the injection process of the fire extinguishing gas is completed and the fire alarm signal from the detector inside the energy storage device is continuously received during a preset third time period, the fire extinguishing liquid input control switch is controlled to be turned on.

[0095] The third time period is a period of time pre-set based on actual experience. Since it takes a certain amount of time to control the fire inside the energy storage device using fire extinguishing gas, the detector inside the energy storage device should no longer send out a fire alarm signal after the fire is controlled. If the detector continues to send out a fire alarm signal during this time period, it means that the fire has not been effectively controlled and fire extinguishing liquid is needed to control the fire.

[0096] Similarly, the fire control device controls the fire extinguishing liquid input control switch to open, so that the fire extinguishing liquid is sprayed on the entire energy storage device through the liquid-gas common trunk pipeline. The final immersion processing process can refer to the processing process in step S104 and step S105, which will not be repeated here.

[0097] Some embodiments of the present application also provide a structure of a fire detection and fire extinguishing system for an energy storage device, such as Figure 3 As shown, the system includes: a fire control device 1, a fire extinguishing liquid access pipeline 2, a fire extinguishing gas storage device 3, a switch 4 for controlling the liquid and gas common branch pipeline entering the battery pack cluster, a liquid and gas common trunk pipeline 5, a liquid and gas common injection device 6, a fire extinguishing liquid control switch 7, a switch 8 for controlling the fire extinguishing gas storage device, a liquid and gas common branch pipeline 9, a detector 10 and a switch 11 for controlling the liquid and gas common branch pipeline entering the battery pack in the battery pack cluster.

[0098] The fire control device 1 is used to receive the fire alarm signal sent by the detector 10 and determine the corresponding fire alarm level according to the fire alarm signal, and when the fire alarm level is serious, control the multi-stage liquid-gas common control switch on the liquid-gas common pipeline between the fire extinguishing gas storage device 3 and the battery pack to open, so that the fire extinguishing gas is transported to the inside of the battery pack through the liquid-gas common pipeline and sprayed through the liquid-gas common spray device 6 to extinguish the fire; it is also used to control the fire extinguishing liquid input control switch 7 to open when the fire spreads inside the battery pack, so that the fire extinguishing liquid is poured into the battery pack through the liquid-gas common pipeline to immerse the battery pack; it is also used to control the liquid-gas common main control switch (not shown) on the liquid-gas common trunk pipeline 5 to open when the fire alarm signal of the detector 10 set inside the energy storage device or the battery pack is continuously received in a preset first time period, so that the fire extinguishing liquid is sprayed to the inside of the entire energy storage device through the liquid-gas common trunk pipeline 5 to finally achieve immersion.

[0099] The fire extinguishing liquid access pipeline 2 is provided with a fire extinguishing liquid input control switch 7, which is connected to the external fire extinguishing liquid input pipeline and is used to input the fire extinguishing liquid into the liquid-gas common trunk pipeline 5 and the liquid-gas common branch pipeline 9.

[0100] The fire extinguishing gas storage device 3 is used to store the fire extinguishing agent for generating the fire extinguishing gas.

[0101] The liquid-gas common trunk pipeline 5 is arranged inside the energy storage device and is used to transmit fire extinguishing gas or fire extinguishing liquid when extinguishing a fire in the entire energy storage device.

[0102] The liquid-gas common injection device 6 is arranged on the liquid-gas common trunk pipeline 5 and the liquid-gas common branch pipeline 9, and is used for injecting fire extinguishing gas or fire extinguishing liquid to extinguish fire.

[0103] The multi-stage liquid-gas shared control switch includes a switch 8 for controlling a fire extinguishing gas storage device, a switch 4 for controlling a liquid-gas shared branch pipeline entering a battery pack cluster, and a switch 11 for controlling a liquid-gas shared branch pipeline entering a battery pack in a battery pack cluster, and is used to receive a control signal sent by a fire control device 1 and to open and close according to the control signal.

[0104] The liquid-gas common branch pipeline 9 has one end connected to the liquid-gas common trunk pipeline 5 and the other end arranged inside the battery pack in the battery pack cluster, and is used to transmit fire extinguishing gas or fire extinguishing liquid when extinguishing a fire in the battery pack.

[0105] The detector 10 is arranged inside the energy storage device and the battery pack, and is used to send a fire alarm signal to the fire control device 1.

[0106] In summary, the solution provided by the present application is capable of receiving a fire alarm signal sent by a detector arranged inside a battery pack, determining a corresponding fire alarm level according to the fire alarm signal, and, when the fire alarm level is serious, controlling the multi-stage liquid-gas common control switch on the liquid-gas common pipeline between the fire extinguishing gas storage device and the battery pack to be turned on, so that the fire extinguishing gas is transported to the inside of the battery pack through the liquid-gas common pipeline and sprayed through the liquid-gas common spray device for fire extinguishing; and, when the fire inside the battery pack spreads, controlling the fire extinguishing liquid input control switch to be turned on, so that the fire extinguishing liquid is poured into the battery pack through the liquid-gas common pipeline for fire extinguishing. When the battery pack is immersed and the fire alarm signal from the detector arranged inside the energy storage device or the battery pack is continuously received during the preset first time period, the liquid-gas common main control switch on the liquid-gas common trunk pipeline is controlled to be turned on, so that the fire extinguishing liquid is sprayed to the inside of the entire energy storage device through the liquid-gas common trunk pipeline, and finally the immersion is achieved, thereby realizing the gas-liquid dual-purpose pipeline design, reducing the difficulty of fire protection pipeline design in the energy storage device, and being able to input the fire extinguishing liquid into the battery pack where the fire has occurred through the liquid-gas common pipeline for fire extinguishing, accurately extinguishing the early and late fires in the battery pack, achieving better fire extinguishing effect, and reducing the cost of the fire protection system.

[0107] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

Claims

1. A fire detection and fire extinguishing method for energy storage equipment, characterized in that: The method includes: Receiving a fire alarm signal sent by a detector arranged inside the battery pack; Determine a corresponding fire alarm level according to the fire alarm signal, wherein the fire alarm level includes ordinary and severe; When the fire alarm level is serious, the multi-stage liquid-gas common control switch on the liquid-gas common pipeline between the fire extinguishing gas storage device and the battery pack is controlled to be turned on, so that the fire extinguishing gas is transported to the inside of the battery pack through the liquid-gas common pipeline and sprayed through the liquid-gas common spray device to extinguish the fire; In the case where the fire inside the battery pack spreads, the fire extinguishing liquid input control switch is controlled to be turned on, so that the fire extinguishing liquid is poured into the battery pack through the liquid-gas common pipeline to immerse the battery pack; When a fire alarm signal from a detector disposed inside the energy storage device or inside the battery pack is continuously received during a preset first time period, the liquid-gas common main control switch on the liquid-gas common trunk pipeline is controlled to be turned on, so that the fire extinguishing liquid sprays the interior of the entire energy storage device through the liquid-gas common trunk pipeline, ultimately achieving immersion.

2. The method according to claim 1, characterized in that The detector includes a combination of the following: a combustible gas sensor, a temperature sensor and a smoke sensor.

3. The method according to claim 2, characterized in that According to the fire alarm signal, determining a corresponding fire alarm level includes: In the case where the fire alarm signal is sent by any one of the combustible gas sensor, the temperature sensor and the smoke sensor, the fire alarm level is determined to be normal; or In the case that the fire alarm signal is sent by at least two of the combustible gas sensor, the temperature sensing sensor and the smoke sensing sensor, the fire alarm level is determined to be severe.

4. The method according to claim 3, characterized in that The method further includes: When the fire alarm level is normal, activate the alarm and output a normal fire alarm signal; or When the fire alarm level is serious, the sound and light alarm and the gas release indicator light are activated and a serious fire alarm signal is output.

5. The method according to claim 1, characterized in that The multi-stage liquid-gas shared control switch includes: a switch for controlling the fire extinguishing gas storage device, a switch for controlling the liquid-gas shared branch pipeline entering the battery pack cluster, and a switch for controlling the liquid-gas shared branch pipeline entering the battery pack in the battery pack cluster.

6. The method according to claim 1, characterized in that In the case of fire spreading inside the battery pack, controlling the fire extinguishing liquid input control switch to turn on includes: When the spraying process of the fire extinguishing gas is completed and the fire alarm signal from the detector inside the battery pack is continuously received within a preset second time period, the fire extinguishing liquid input control switch is controlled to be turned on.

7. A fire detection and fire extinguishing method for energy storage equipment, characterized in that: The method includes: Receiving a fire alarm signal sent by a detector installed inside the energy storage device; Determine a corresponding fire alarm level according to the fire alarm signal, wherein the fire alarm level includes ordinary and severe; When the fire alarm level is serious, the liquid-gas common main control switch on the liquid-gas common trunk pipeline connected to the fire extinguishing gas storage device is controlled to be turned on, so that the fire extinguishing gas is transported to the interior of the energy storage device through the liquid-gas common trunk pipeline and sprayed through the liquid-gas common spray device to extinguish the fire; In the case where the fire spreads inside the energy storage device, the fire extinguishing liquid input control switch is controlled to be turned on, so that the fire extinguishing liquid is sprayed to the inside of the entire energy storage device through the liquid-gas common trunk pipeline, and finally immersion is achieved.

8. The method according to claim 7, characterized in that The method further includes: When the real-time detection data of the detector exceeds the corresponding preset threshold, the detector sends the corresponding fire alarm signal.

9. The method according to claim 7, characterized in that: In the case of fire spreading inside the energy storage device, controlling the fire extinguishing liquid input control switch to open includes: When the spraying process of the fire extinguishing gas is completed and the fire alarm signal from the detector inside the energy storage device is continuously received in a preset third time period, the fire extinguishing liquid input control switch is controlled to be turned on.

10. A fire detection and extinguishing system for energy storage equipment, characterized in that: The system includes: A fire control device, for receiving a fire alarm signal sent by a detector and determining a corresponding fire alarm level according to the fire alarm signal, and, when the fire alarm level is serious, controlling the multi-stage liquid-gas common control switch on the liquid-gas common pipeline between the fire extinguishing gas storage device and the battery pack to be turned on, so that the fire extinguishing gas is transported to the inside of the battery pack through the liquid-gas common pipeline and sprayed through the liquid-gas common spray device to extinguish the fire; and for, when the fire inside the battery pack spreads, controlling the fire extinguishing liquid input control switch to be turned on, so that the fire extinguishing liquid is poured into the battery pack through the liquid-gas common pipeline to immerse the battery pack; and for, when the fire alarm signal from the detector arranged inside the energy storage device or inside the battery pack is continuously received in a preset first time period, controlling the liquid-gas common main control switch on the liquid-gas common trunk pipeline to be turned on, so that the fire extinguishing liquid sprays the entire energy storage device through the liquid-gas common trunk pipeline to finally immerse the entire energy storage device; The fire extinguishing liquid access pipeline is provided with a fire extinguishing liquid input control switch, connected to an external fire extinguishing liquid input pipeline, and used to input the fire extinguishing liquid into the liquid-gas common trunk pipeline and the liquid-gas common branch pipeline; a fire extinguishing gas storage device for storing a fire extinguishing agent for generating fire extinguishing gas; A liquid-gas common trunk pipeline is arranged inside the energy storage device and is used to transmit fire extinguishing gas or fire extinguishing liquid when extinguishing a fire in the entire energy storage device; A liquid-gas common spraying device, arranged on the liquid-gas common trunk pipeline and the liquid-gas common branch pipeline, for spraying the fire extinguishing gas or the fire extinguishing liquid to extinguish the fire; A multi-stage liquid-gas common control switch, including a switch for controlling the fire extinguishing gas storage device, a switch for controlling the liquid-gas common branch pipeline entering the battery pack cluster, and a switch for controlling the liquid-gas common branch pipeline entering the battery pack in the battery pack cluster, for receiving a control signal sent by the fire control device and opening and closing according to the control signal; A liquid-gas common branch pipeline, one end of which is connected to the liquid-gas common trunk pipeline, and the other end of which is arranged inside the battery pack in the battery pack cluster, and is used to transmit fire extinguishing gas or fire extinguishing liquid when extinguishing a fire in the battery pack; The detector is arranged inside the energy storage device and the battery pack, and is used to send a fire alarm signal to the fire control device.

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