Energy storage prefabricated cabin fire fighting device and control method

Abstract

The invention relates to the technical field of energy storage systems, and discloses an energy storage prefabricated cabin fire fighting device and a control method. The energy storage prefabricated cabin fire fighting device comprises a unit control system, a fire fighting control system, a gas fire extinguishing system and a water fire fighting system, a fire fighting host of the fire fighting control system monitors a battery cabin and a battery pack in real time through a detector and a BMS, and a unit controller of the unit control system monitors the battery cabin in real time through an independent detector. The unit controller is in communication connection with the fire-fighting host, is provided with a communication fault flag bit, and is in signal connection with the fire-fighting host through a plurality of dry contacts. According to the energy storage prefabricated cabin fire-fighting device, the fire-fighting host executes the corresponding preset fire-fighting action according to the preset program when detecting the fire-fighting alarm, and pesticide is sprayed to the battery pack to extinguish fire. When the unit controller detects a fire-fighting alarm and the fire-fighting control system fails or loses power, the fire-fighting system is taken over, pesticide is sprayed to the battery pack to extinguish fire, the cost is low, and the response speed is high.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of energy storage systems, and in particular to a fire-fighting device and a control method for a prefabricated energy storage cabin. Background Art

[0002] In recent years, with the continuous development of lithium battery technology, the position of battery energy storage system in the power system has become increasingly important. Battery energy storage system includes multiple battery packs (PACK). With the continuous construction and application of energy storage stations, the safety of energy storage system has received more and more attention.

[0003] Prefabricated cabin (container) energy storage system mainly uses perfluorohexanone fire extinguishing agent, and monitors the environment where the battery pack is located through multiple temperature, smoke and combustible gas detectors, or uses detectors inside the battery pack to monitor the battery pack. When the detector detects a fire signal, the fire protection system will spray the corresponding battery pack, battery cluster or the entire battery compartment according to the detected signal.

[0004] The inventors of the present application have discovered that, in order to improve the accuracy of detection, the current fire protection system of the energy storage container needs to provide a detector in each battery pack to detect and locate the thermal runaway of the battery, which greatly increases the number of detectors in the entire fire protection system and increases the overall cost; and the battery management system (BMS) of the battery pack itself, as a detector of the battery cell status, does not participate in fire monitoring and fire extinguishing logic judgment. The overall fire extinguishing device is triggered relatively late, and it is impossible to perform fire extinguishing intervention in the early stage of thermal runaway of the battery pack. Summary of the invention

[0005] The object of the present invention is to provide a fire-fighting device and a control method for a prefabricated energy storage cabin to solve the problems in the above-mentioned background technology.

[0006] The embodiment of the present invention provides a fire-fighting device for a prefabricated energy storage cabin, including: a unit control system, a fire control system, a gas fire-fighting system and a water fire-fighting system;

[0007] The energy storage prefabricated cabin comprises: a battery cabin and an equipment cabin, wherein the battery cabin is isolated from the equipment cabin by a metal plate, a plurality of battery clusters consisting of battery packs connected in series are arranged in the battery cabin, and a plurality of PCS are arranged in the equipment cabin;

[0008] The fire control system comprises: a fire host, two first battery compartment temperature detectors arranged in the battery compartment, two first battery compartment smoke detectors and two first battery compartment combustible gas detectors, and a first equipment compartment smoke detector arranged in the equipment compartment;

[0009] The fire host is arranged in the equipment cabin, all detectors of the fire control system are electrically connected to the fire host respectively, and the fire host is electrically connected to the battery management system of the battery pack;

[0010] The unit control system includes: a unit controller, a second battery compartment smoke detector and a battery compartment temperature and humidity sensor arranged in the battery compartment, and an equipment compartment temperature and humidity sensor arranged in the equipment compartment, the unit controller is arranged in the equipment compartment, the detector and the sensor of the unit control system are electrically connected to the unit controller respectively, and the unit controller is electrically connected to the battery management system of the battery pack;

[0011] The gas fire extinguishing system and the water fire extinguishing system are electrically connected to the fire fighting host and the unit controller respectively, and are used to extinguish the fire of the battery pack in the battery compartment;

[0012] The unit controller is connected to the fire host through communication, and is provided with a communication fault flag. The unit controller is connected to the fire host through multiple dry contact signals. The fire host is used to control the gas fire extinguishing system and / or the water fire fighting system to start when a fire alarm is detected, and send a fire alarm signal to the unit controller. The fire control system fault signal adopts a normally closed contact;

[0013] The unit controller is used to control the start-up of the gas fire extinguishing system and / or the water fire extinguishing system according to the verification result when a fire alarm is detected and no fire alarm signal sent by the fire host is received.

[0014] Based on the above scheme, it can be known that the fire-fighting device of the energy storage prefabricated cabin of the present invention is equipped with a unit control system, a fire control system, a gas fire extinguishing system and a water fire-fighting system. The fire-fighting host of the fire-fighting control system monitors the battery compartment through temperature, smoke and gas detectors, and monitors the battery pack through the BMS. The unit controller of the unit control system monitors the battery compartment and the battery pack through independent detectors. Under normal circumstances, the fire-fighting host of the fire-fighting control system executes the corresponding preset fire-fighting action according to the preset program when a fire alarm is detected, and sprays the battery pack to extinguish the fire. When the unit controller detects a fire alarm and the fire control system fails or loses power, the unit controller takes over the fire-fighting system, starts the fire-fighting device to spray the battery pack to extinguish the fire, and at the same time cuts off the power supply and sends an alarm signal.

[0015] In a feasible solution, the gas fire extinguishing system includes: a perfluorohexanone fire extinguishing bottle group, a main solenoid valve, a cabin-level spraying pipeline, a cabin nozzle, a group-level pipeline, a group-level branch solenoid valve and a battery pack nozzle;

[0016] The perfluorohexanone fire extinguisher bottle group is arranged in the equipment cabin;

[0017] The number of the group-level pipes corresponds to the number of the plurality of battery clusters, and the plurality of group-level pipes are connected in parallel to the perfluorohexanone fire extinguisher bottle group through a main pipe;

[0018] The battery pack nozzle is arranged on the group-level pipeline, and each battery pack corresponds to one battery pack nozzle. The group-level branch solenoid valve is arranged on the group-level pipeline to control the on and off of the nozzles of the entire group of battery packs;

[0019] The cabin-level spraying pipeline is arranged on the top of the battery cabin and is connected to the perfluorohexanone fire extinguishing bottle group through a connecting pipeline. A plurality of cabin-level nozzles are arranged on the cabin-level spraying pipeline. The main solenoid valve is arranged on the connecting pipeline to control the on and off of all cabin-level nozzles.

[0020] The main solenoid valve and the cluster-level branch solenoid valve are both electrically connected to the fire host and the unit controller.

[0021] In a feasible solution, the main solenoid valve is arranged in the equipment compartment, at the back of the PCS installation area;

[0022] The group-level branch solenoid valve is arranged on the back plate of the battery compartment.

[0023] In a feasible solution, the water fire fighting system includes: a sprinkler pipeline and a sprinkler head;

[0024] The side wall of the energy storage prefabricated cabin is provided with a water hose interface;

[0025] The spray pipeline is connected to the water hose interface, and the plurality of nozzles are arranged on the spray pipeline and located on the top of the battery compartment. The water hose interface is used to connect to an external water source.

[0026] In a feasible solution, it also includes: an air intake and exhaust system;

[0027] The air intake and exhaust system is arranged in the battery compartment, and includes: an air intake and an exhaust port;

[0028] The control mechanisms of the air inlet and the exhaust port are electrically connected to the fire fighting host respectively.

[0029] In a feasible solution, the first battery compartment temperature detector, the first battery compartment smoke detector, the first battery compartment combustible gas detector, the second battery compartment smoke detector and the battery compartment temperature and humidity sensor are all arranged on the front door side of the energy storage prefabricated compartment.

[0030] The embodiment of the present invention also provides a control method for a prefabricated energy storage cabin fire-fighting device, comprising the following steps:

[0031] The S1 fire host obtains the environmental data in the battery compartment and the battery pack in real time;

[0032] S2 determines whether the acquired data triggers the fire threshold. If not, it returns to S1; if yes, it executes the corresponding fire strategy and sends a fire alarm signal to the unit controller;

[0033] The S3 unit controller obtains the environmental data in the battery compartment and the battery pack in real time;

[0034] S4 determines whether the acquired data triggers the fire threshold. If not, return to S3; if yes, check whether the fire alarm signal sent by the fire host is received. If yes, return to S3; if not, execute the corresponding fire strategy according to the verification process.

[0035] In a feasible solution, in step S4, executing a corresponding fire fighting strategy according to the verification process specifically includes:

[0036] S41 checks whether the communication between the unit controller and the fire host is normal. If not, go to S411; if yes, go to S412;

[0037] S411 The unit controller reports a fire communication failure and checks whether there is a fault signal at the dry contact. If yes, go to S4111; if no, go to S4112;

[0038] The S4111 unit controller takes over the fire protection system;

[0039] S4112 prompts whether to start the fire protection function of the unit controller? If yes, the unit controller takes over the fire protection system; if no, it reports a fire protection communication failure;

[0040] S412 detects whether the fault flag is consistent with the dry contact fault signal. If consistent, go to S4121; if inconsistent, go to S4122;

[0041] If the fault flag and the dry contact fault signal are both normal in S4121, the process returns to S41; if the fault flag and the dry contact fault signal are both faulty, the process goes to S4111;

[0042] If the fault flag is not faulty and there is a dry contact fault signal in S4122, then return to S41; if the fault flag is faulty and there is no dry contact fault signal, then go to S4111.

[0043] In a feasible solution, in step S2, the fire alarm signal includes: a primary alarm signal and a secondary alarm signal;

[0044] The first-level alarm signal includes: any single detector trigger alarm and battery management system thermal runaway alarm;

[0045] The secondary alarm signal includes any one of the following conditions:

[0046] The first threshold of the combustible gas detector in the first battery compartment + the alarm of the temperature detector in the first battery compartment;

[0047] The first battery compartment heat detector + the first battery compartment smoke detector alarm;

[0048] two first battery compartment combustible gas detector second thresholds;

[0049] Battery management system thermal runaway alarm + any detector alarm;

[0050] The implementation of corresponding fire fighting strategies includes:

[0051] When the battery management system alarms for thermal runaway, the cluster-level branch solenoid valve of the cluster where the battery management system is located opens to spray the battery packs of the entire cluster with chemicals;

[0052] When the detector in the battery compartment triggers the fire alarm, the main solenoid valve opens and sprays the agent on all battery packs.

[0053] Compared with the prior art, the present invention has the following beneficial effects:

[0054] 1. The BMS of the battery pack acts as a fire detector and participates in fire monitoring, which reduces costs and has a fast response speed.

[0055] 2. The unit controller is equipped with independent temperature and humidity sensors and smoke detectors, which can activate the gas fire extinguishing system and water fire extinguishing system to extinguish the fire when the fire control system fails.

[0056] 3. The fire protection system fault contacts use normally closed contacts, which can still send out fault information when the fire protection host loses power or crashes, making the system safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0058] Figure 1 This is a schematic diagram of a fire-fighting device for a prefabricated energy storage cabin in Embodiment 1 of the present invention;

[0059] Figure 2 The figure is a schematic diagram of the verification process in the second embodiment of the present invention.

[0060] Numbers in the figure:

[0061] 11. Battery compartment; 12. Equipment compartment; 101. Unit controller; 102. Equipment compartment temperature and humidity sensor; 103. First equipment compartment smoke detector; 104. Fire host; 106. Main solenoid valve; 107. Second battery compartment smoke detector; 108. Battery compartment temperature and humidity sensor; 109. First battery compartment temperature detector; 110. First battery compartment smoke detector; 111. First battery compartment combustible gas detector; 112. Cabin-level spray pipeline; 113. Cabin nozzle; 114. Water fire fighting system; 115. Exhaust port; 116. Family-level pipeline; 117. Battery pack nozzle; 118. Family-level branch solenoid valve; 120. Air inlet; 121. Perfluorohexanone fire extinguisher bottle group; 122. Energy storage inverter; 123. Battery pack. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0064] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0066] As described in the background technology of this application, the prefabricated cabin (container) type energy storage system mainly uses perfluorohexanone fire extinguishing agent, and monitors the environment where the battery pack is located through multiple temperature, smoke, and combustible gas detectors, or uses detectors inside the battery pack to monitor the battery pack. When the detector detects a fire signal, the fire protection system will spray the corresponding battery pack, battery cluster or the entire battery compartment according to the detected signal.

[0067] The inventors of the present application have discovered that, in order to improve the accuracy of detection, the current fire protection system of the energy storage container needs to provide a detector in each battery pack to detect and locate the thermal runaway of the battery pack, which greatly increases the number of detectors in the entire fire protection system and increases the overall cost; and the battery management system (BMS) of the battery pack itself, as a detector of the battery cell status, does not participate in fire monitoring and fire extinguishing logic judgment. The overall fire extinguishing device is triggered relatively late, and it is impossible to perform fire extinguishing intervention in the early stage of thermal runaway of the battery pack.

[0068] In order to solve the above problems, the inventor of the present application proposed the technical solution of the present application, and the specific embodiments are as follows:

[0069] Embodiment 1

[0070] Figure 1 This is a schematic diagram of the fire-fighting device of the prefabricated energy storage cabin in the first embodiment of the present invention.

[0071] like Figure 1 As shown, the fire-fighting device of the energy storage prefabricated cabin of this embodiment includes: a unit control system, a fire control system, a gas fire-fighting system and a water fire-fighting system 114.

[0072] The energy storage prefabricated cabin is in a rectangular shape (container type), including: a battery cabin 11 and an equipment cabin 12.

[0073] The battery compartment 11 and the equipment compartment 12 are separated by metal plates, which form a fire-resistant partition wall to separate the battery compartment 11 and the equipment compartment 12. The metal plates are provided with prefabricated holes for accessories such as cables and pipes to pass through the compartment. Multiple battery clusters and corresponding cooling and ventilation systems are arranged in the battery compartment 11. Each battery cluster is formed by multiple battery packs 123 (PACK) connected in series. The battery compartment 11 is a gas fire extinguishing protection area. Multiple energy storage converters 122 (PCS) are arranged in the equipment compartment 12.

[0074] The fire control system includes: a fire host 104, a first battery compartment temperature detector 109, a first battery compartment smoke detector 110 and a first battery compartment combustible gas detector 111 arranged in the battery compartment 11, and a first equipment compartment smoke detector 103 arranged in the equipment compartment 12. The number of the first battery compartment temperature detector 109, the first battery compartment smoke detector 110 and the first battery compartment combustible gas detector 111 are two each, and the number of the first equipment compartment smoke detector 103 is one.

[0075] The fire host 104 of the fire control system is arranged in the equipment compartment 12, and the various detectors of the fire control system are electrically connected to the fire host 104, and the fire host 104 is electrically connected to the battery management system (BMS) of the battery pack 123. The fire host 104 monitors and supervises the environmental status in the battery compartment 11 and the environmental status in the battery pack 123 through the various detectors and BMS.

[0076] The unit control system includes: a unit controller 101, a second battery compartment smoke detector 107 and a battery compartment temperature and humidity sensor 108 arranged in the battery compartment 11, and an equipment compartment temperature and humidity sensor 102 arranged in the equipment compartment 12. The unit controller 101 is arranged in the equipment compartment 12, and each sensor and detector of the unit control system is electrically connected to the unit controller 101, and the unit controller 101 is electrically connected to the battery management system (BMS) of the battery pack 123. The unit controller 101 monitors and supervises the battery compartment 11 and the battery pack through detectors and sensors independent of the fire control system.

[0077] The gas fire extinguishing system and the water fire extinguishing system 114 are electrically connected to the fire host 104 of the fire control system, and the gas fire extinguishing system and the water fire extinguishing system 114 are electrically connected to the unit controller 101 of the unit control system.

[0078] The unit controller 101 and the fire host 104 are arranged in the equipment compartment 12, and the unit controller 101 and the fire host 104 are connected via one RS-485 communication, and a communication fault flag is provided between the unit controller 101 and the fire host 104. The unit controller 101 and the fire host 104 are connected via multiple dry contact signals, and the dry contact signals transmit the first-level alarm signal of the fire host, the second-level alarm signal of the fire host and the status of the fire host (fault feedback).

[0079] In this embodiment, the fire host is the control core of the fire-fighting device of the energy storage prefabricated cabin, and the unit controller serves as a backup fire-fighting device control system for the energy storage prefabricated cabin, connecting smoke detectors, temperature and humidity sensors, and gas fire extinguishing devices that are independent of the fire control system.

[0080] The fire host obtains the environmental data of the battery compartment in real time through various detectors and monitors the environmental status inside the battery compartment. The parameter data in the battery pack is obtained through the BMS to monitor the environmental status inside the battery pack. When the data detected by the detector of the fire control system triggers the fire threshold, or the BMS sends a thermal runaway signal, the fire host starts the gas fire extinguishing system and / or water fire extinguishing system according to the preset program, executes the corresponding fire fighting action, and extinguishes the battery pack in the battery compartment; at the same time, the fire host sends a fire alarm signal to the unit controller. The system fault signal uses a normally closed contact, so that the alarm signal can still be sent when the fire host is powered off or crashes.

[0081] The unit controller obtains the environmental data of the battery compartment through the second battery compartment smoke detector and the battery compartment temperature and humidity sensor, monitors the environmental status of the battery compartment, and monitors the environmental status of the battery pack through the BMS. When the data detected by the detector of the unit control system triggers the fire threshold, and the unit controller does not receive the fire alarm signal sent by the fire host, the unit controller will verify according to the preset verification logic. When it is confirmed that the fire control system fails or loses power, the unit controller can continue to operate and start the gas fire extinguishing system and / or water fire extinguishing system to extinguish the battery pack in the battery compartment; at the same time, the power supply is cut off and a fire alarm is issued.

[0082] It is not difficult to find from the above content that the fire-fighting device of the energy storage prefabricated cabin of this embodiment, by setting up a unit control system, a fire control system, a gas fire extinguishing system and a water fire-fighting system, the fire-fighting host of the fire-fighting control system monitors the battery compartment through temperature, smoke and gas detectors, and monitors the battery pack through the BMS. The unit controller of the unit control system monitors the battery compartment and the battery pack through independent detectors. Under normal circumstances, the fire-fighting host of the fire-fighting control system executes the corresponding preset fire-fighting action according to the preset program when a fire alarm is detected, and sprays the battery pack to extinguish the fire. When the unit controller detects a fire alarm and the fire control system fails or loses power, the unit controller takes over the fire-fighting system, starts the fire-fighting device to spray the battery pack to extinguish the fire, and at the same time cuts off the power supply and sends an alarm signal.

[0083] Optionally, the energy storage prefabricated cabin fire-fighting device in this embodiment, the gas fire-extinguishing system includes: a perfluorohexanone fire-extinguishing bottle group 121, a main solenoid valve 106, a cabin-level spraying pipeline 112, an in-cabin nozzle 113, a group-level pipeline 116, a group-level branch solenoid valve 118 and a battery pack nozzle 117.

[0084] The perfluorohexanone fire extinguisher bottle group 121 is arranged in the equipment cabin 12.

[0085] The number of the group-level pipes 116 corresponds to the number of the multiple battery clusters, and each cluster-level pipe 116 corresponds to one battery cluster. After being connected in parallel, the multiple group-level pipes 116 are connected and communicated with the perfluorohexanone fire extinguisher bottle group 121 through the main pipe.

[0086] The number of battery pack nozzles 117 corresponds to the number of battery packs 123. The battery pack nozzles 117 are arranged on the group-level pipes 116, and each battery pack 123 corresponds to a battery pack nozzle 117. The group-level branch solenoid valve 118 is arranged on the group-level pipes 116, and is located at the head end of the cluster-level pipes 116. Each cluster-level pipe 116 is provided with a cluster-level branch solenoid valve 118, and the cluster-level branch solenoid valve 118 controls the on and off of the battery pack nozzles 117 of the entire group on the cluster-level pipe 116, that is, when the cluster-level branch solenoid valve 118 is turned on, the battery packs 123 (PACK) of the entire cluster are sprayed with medicine to extinguish the fire at the same time.

[0087] The cabin-level spraying pipeline 112 is arranged at the top of the battery compartment 11 and is connected to the perfluorohexanone fire extinguishing bottle group 121 through a connecting pipe. Multiple cabin nozzles 113 are arranged on the cabin-level spraying pipeline 112, and the cabin nozzles 113 cover all battery packs 123 in the battery compartment 11. The main solenoid valve 106 is arranged on the connecting pipe, and the main solenoid valve 106 controls the on and off of all cabin nozzles 113 in the battery compartment 11. When the main solenoid valve 106 is turned on, all cabin nozzles 113 spray to extinguish the fire.

[0088] The group-level branch solenoid valve 118 and the main solenoid valve 106 are electrically connected to the fire host 104 and are also electrically connected to the unit controller 101 respectively.

[0089] Furthermore, in the energy storage prefabricated cabin fire-fighting device in this embodiment, the main solenoid valve 106 is installed in the equipment cabin 12, located at the back of the PCS installation area, away from the heat-generating components in the equipment cabin 12, thereby extending the service life of the main solenoid valve 106.

[0090] The group-level branch solenoid valve 118 is installed on the back plate of the battery compartment 11 and is separated from the battery pack 123 of the battery cluster to ensure safe use and extend the service life.

[0091] Optionally, the energy storage prefabricated cabin fire-fighting device in this embodiment, the water fire-fighting system 114 includes: a sprinkler pipeline and a sprinkler head.

[0092] The side wall of the energy storage prefabricated cabin is provided with a hose interface, and the sprinkler pipeline of the water fire fighting system 114 is arranged on the top of the battery compartment 11, connected to the hose interface through a connecting pipeline, and the hose interface is connected to an external water source pipeline. Multiple sprinklers are arranged on the sprinkler pipeline, located on the top of the battery compartment 11, and the multiple sprinklers cover all battery packs 123 in the battery compartment 11.

[0093] Optionally, the energy storage prefabricated cabin fire-fighting device in this embodiment also includes: an air intake and exhaust system.

[0094] The air intake and exhaust system is disposed in the battery compartment 11 , and includes an air intake 120 and an air exhaust 115 .

[0095] The air inlet 120 and the exhaust port 115 are both electrically controlled, and the control mechanisms of the air inlet 120 and the exhaust port 115 are electrically connected to the fire host 104 respectively.

[0096] The air inlet 120 and the exhaust port 115 are in a closed state when there is no fire alarm. When there is a fire alarm and they need to be opened, the fire host 104 controls the air inlet 120 and the exhaust port 115 to open so that air can circulate in the battery compartment 11.

[0097] Optionally, the energy storage prefabricated cabin fire-fighting device in this embodiment, the first battery cabin temperature detector 109, the first battery cabin smoke detector 110, the first battery cabin combustible gas detector 111, the second battery cabin smoke detector 107 and the battery cabin temperature and humidity sensor 108 in the battery cabin 11 are all arranged on the front door side of the energy storage prefabricated cabin, so as to facilitate daily maintenance, repair and replacement.

[0098] Embodiment 2

[0099] Figure 2 The figure is a schematic diagram of the verification process in the second embodiment of the present invention.

[0100] The present invention also provides a control method for the energy storage prefabricated cabin fire-fighting device.

[0101] The control method of the energy storage prefabricated cabin fire-fighting device of this embodiment includes the following steps:

[0102] The S1 fire host obtains the environmental data inside the battery compartment and the battery pack in real time.

[0103] The fire host obtains environmental data such as temperature, smoke concentration and combustible gas concentration in the battery compartment through various detectors, and obtains environmental data such as temperature and pressure in the battery pack through the battery pack's BMS, and monitors the environmental status in the battery compartment and the battery pack in real time.

[0104] S2 determines whether the acquired data triggers the fire threshold. If not, it returns to S1; if yes, it executes the corresponding fire strategy and sends a fire alarm signal to the unit controller.

[0105] The fire host determines whether the obtained parameter data triggers the fire threshold. If the parameter data are all within the normal range and the fire threshold is not triggered, it returns to S1 and continues to detect and monitor the battery compartment and battery pack.

[0106] If certain parameter data obtained exceeds the normal range and triggers the fire threshold, the corresponding fire strategy will be executed according to the preset program. The fire-fighting entity will start the gas fire-fighting system and / or the water fire-fighting system to extinguish the battery pack; at the same time, the fire-fighting entity will send a fire alarm signal to the unit controller.

[0107] The S3 unit controller obtains the environmental data of the battery compartment and the environmental data inside the battery pack in real time.

[0108] The unit controller obtains the environmental data of the battery compartment through the second battery compartment smoke detector and battery compartment temperature and humidity sensor independent of the fire control system, obtains the environmental data inside the battery pack through the battery pack's BMS, and monitors the environmental status of the battery compartment and the environmental status inside the battery pack.

[0109] S4 The unit controller determines whether the acquired data triggers the fire threshold. If not, it returns to S3; if yes, it checks whether the fire alarm signal sent by the fire host is received. If yes, it returns to S3; if not, it executes the corresponding fire strategy according to the verification process.

[0110] The unit controller determines whether the acquired parameter data triggers the fire threshold. If all parameters are within the normal range and the fire threshold is not triggered, it returns to S3 and continues to monitor the battery compartment and battery pack.

[0111] If some of the acquired parameters exceed the normal range and trigger the fire threshold, it will detect whether the fire alarm signal sent by the fire host is received. If the fire alarm signal sent by the fire host is received, it means that the fire control system is normal, and the fire control system executes the fire strategy. The unit controller returns to S3 and continues to monitor the battery compartment and battery pack; if the fire alarm signal sent by the fire host is not received, it means that the fire control system may have a fault, and the unit controller verifies the fire system according to the verification process and executes the corresponding fire strategy according to the verification result.

[0112] Further, such as Figure 2 As shown, the control method of the energy storage prefabricated cabin fire-fighting device in this embodiment, in step S4, the corresponding fire-fighting strategy is executed according to the verification process, specifically including:

[0113] S41 detects whether the communication between the unit controller and the fire host is normal. If not (abnormal), go to S411; if yes (normal), go to S412.

[0114] S411 The unit controller reports a fire communication failure and checks whether there is a fault signal at the dry contact. If yes, go to S4111; if no, go to S4112.

[0115] If there is a communication failure (communication interruption) between the unit controller and the fire host, the unit controller will report the fire communication failure after a delay of 120S. The monitoring system will pop up a prompt to check the status of the fire control system and check whether there is a fault signal at the dry contact (hard contact) between the unit controller and the fire host after the communication is interrupted. If there is a fault signal, go to S4111; if there is no fault signal, go to S4112.

[0116] S4111 If there is a fault signal at the dry contact (hard contact) between the unit controller and the fire host, indicating that the fire system is faulty, the unit controller will take over the fire system and activate the fire function of the unit controller.

[0117] S4112 prompts whether to start the fire protection function of the unit controller. If yes, the unit controller takes over the fire protection system; if no, it reports a fire protection communication failure.

[0118] If there is no fault signal at the dry contact (hard contact) between the unit controller and the fire host, the unit controller prompts whether to start the fire function of the unit controller? If yes, the unit controller takes over the fire protection system and activates the fire protection function of the unit controller; if not, the unit controller reports the fire protection communication failure and the fire protection redundant safety function failure.

[0119] S412 detects whether the fault flag is consistent with the dry contact fault signal. If consistent, go to S4121; if inconsistent, go to S4122;

[0120] If the communication between the unit controller and the fire host is normal, check whether the fault signal of the fault flag and the dry contact fault signal are consistent. If they are consistent, go to the following S4121; if they are inconsistent, go to the following S4122.

[0121] If the fault flag and the dry contact fault signal are both normal in S4121, the process returns to S41; if the fault flag and the dry contact fault signal are both faulty, the process goes to S4111.

[0122] If the fault flag and the dry contact signal are consistent and both are normal, it means that the fire protection system is normal, then it returns to S41 and the unit controller continues to monitor; if the fault flag and the dry contact signal are consistent and both are faulty, that is, both report a fault, indicating that the fire protection system is faulty, then it goes to S4111 and the unit controller takes over the fire protection system and activates the fire protection function of the unit controller.

[0123] If the fault flag is not faulty and there is a dry contact fault signal in S4122, then return to S41; if the fault flag is faulty and there is no dry contact fault signal, then go to S4111.

[0124] If the fault flag and the dry contact fault signal are inconsistent, and there is no fault in the fault flag communication and the dry contact fault signal, it means that the fire control system is normal, then it returns to S41 and the system continues to monitor.

[0125] If the fault flag indicates a communication failure and there is no fault signal at the dry contact, it means that the fire control system is faulty, then go to S4111, the unit controller takes over the fire protection system, and activates the fire protection function of the unit controller.

[0126] Furthermore, in the control method of the energy storage prefabricated cabin fire-fighting device in this embodiment, in step S2, the fire alarm signal sent by the fire host includes: a primary alarm signal and a secondary alarm signal.

[0127] The first-level alarm signal includes: when any single detector of the fire control system triggers an alarm, and when the BMS (battery management system) thermal runaway alarm sounds, the fire host sends a first-level alarm signal.

[0128] Secondary alarm signals include any of the following:

[0129] A. The combustible gas detector in the first battery compartment triggers the first threshold + the temperature detector in the first battery compartment alarms;

[0130] B. The first battery compartment temperature detector + the first battery compartment smoke detector alarm;

[0131] C. The two first battery compartment combustible gas detectors trigger the second threshold;

[0132] D. BMS (battery management system) thermal runaway alarm + any detector alarm;

[0133] The implementation of corresponding fire fighting strategies includes:

[0134] The entire battery compartment is divided into areas through the main solenoid valve 106, the cluster branch solenoid valve 116 and the BMS thermal runaway alarm, the first battery compartment temperature detector 109, the first battery compartment smoke detector 110, and the first battery compartment combustible gas detector 111.

[0135] The BMS (battery management system) thermal runaway alarm cooperates with the first battery compartment smoke detector 110 and the first battery compartment combustible gas detector 111 to alarm, triggering the cluster-level branch solenoid valve 116 of the cluster where the BMS is located to open, and spraying the entire cluster of battery packs with chemicals.

[0136] Only when the detector in the battery compartment triggers the fire alarm, the main solenoid valve opens and sprays the agent. This can effectively inject limited fire extinguishing agent into the thermal runaway space to prevent the spread of thermal runaway.

[0137] In the energy storage prefabricated cabin fire-fighting device of the present invention, under normal circumstances, the fire host and fire detector in the fire control system have control self-checking and fault self-checking functions. When the fire host fails or the fire detector communication fails, it can output a fire system fault signal to promptly notify the corresponding personnel to handle it. The fire system fault signal uses a normally closed contact, which is convenient for sending an alarm signal when the fire host is powered off or crashes.

[0138] The prefabricated cabin is equipped with a smoke alarm and temperature and humidity sensor that are independent of the fire control system. Under normal circumstances, the temperature and humidity sensor is used to detect the temperature and humidity conditions inside the prefabricated cabin and provide feedback data for the temperature and humidity control of the unit controller. The smoke sensor is a dry contact feedback type. When the set value is reached, the built-in relay is activated and the signal is fed back to the unit controller.

[0139] In the event of a fire control system failure, the unit controller can continue to operate, but prompts that the fire control system is faulty. The unit controller can also limit the operating power, reduce the unit load, and reduce the risk. When the unit controller is enabled to control the fire function according to the logic check, the unit controller can start the fire extinguishing device according to the alarm signal of the independent smoke and temperature fire detectors. At the same time, the power supply is cut off, the personnel in the power station are notified, and the fire accident state is entered.

[0140] In the present invention, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact via an intermediate medium.

[0141] Moreover, the first feature being “above”, “above”, and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0142] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0143] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A prefabricated energy storage cabin fire-fighting device, characterized in that: include: Unit control system, fire control system, gas fire extinguishing system and water fire fighting system; The energy storage prefabricated cabin comprises: a battery cabin and an equipment cabin, wherein the battery cabin is isolated from the equipment cabin by a metal plate, a plurality of battery clusters consisting of battery packs connected in series are arranged in the battery cabin, and a plurality of PCS are arranged in the equipment cabin; The fire control system comprises: a fire host, two first battery compartment temperature detectors arranged in the battery compartment, two first battery compartment smoke detectors and two first battery compartment combustible gas detectors, and a first equipment compartment smoke detector arranged in the equipment compartment; The fire host is arranged in the equipment cabin, all detectors of the fire control system are electrically connected to the fire host respectively, and the fire host is electrically connected to the battery management system of the battery pack; The unit control system includes: a unit controller, a second battery compartment smoke detector and a battery compartment temperature and humidity sensor arranged in the battery compartment, and an equipment compartment temperature and humidity sensor arranged in the equipment compartment, the unit controller is arranged in the equipment compartment, the detector and the sensor of the unit control system are electrically connected to the unit controller respectively, and the unit controller is electrically connected to the battery management system of the battery pack; The gas fire extinguishing system and the water fire extinguishing system are electrically connected to the fire fighting host and the unit controller respectively, and are used to extinguish the fire of the battery pack in the battery compartment; The unit controller is connected to the fire host through communication, and is provided with a communication fault flag. The unit controller is connected to the fire host through multiple dry contact signals. The fire host is used to control the gas fire extinguishing system and / or the water fire fighting system to start when a fire alarm is detected, and send a fire alarm signal to the unit controller. The fire control system fault signal adopts a normally closed contact; The unit controller is used to control the start-up of the gas fire extinguishing system and / or the water fire extinguishing system according to the verification result when a fire alarm is detected and no fire alarm signal sent by the fire host is received.

2. The energy storage prefabricated cabin fire-fighting device according to claim 1 is characterized in that: The gas fire extinguishing system comprises: a perfluorohexanone fire extinguishing bottle set, a main solenoid valve, a cabin-level spraying pipeline, an in-cabin nozzle, a group-level pipeline, a group-level branch solenoid valve and a battery pack nozzle; The perfluorohexanone fire extinguisher bottle group is arranged in the equipment cabin; The number of the group-level pipes corresponds to the number of the plurality of battery clusters, and the plurality of group-level pipes are connected in parallel to the perfluorohexanone fire extinguisher bottle group through a main pipe; The battery pack nozzle is arranged on the group-level pipeline, and each battery pack corresponds to one battery pack nozzle. The group-level branch solenoid valve is arranged on the group-level pipeline to control the on and off of the nozzles of the entire group of battery packs; The cabin-level spraying pipeline is arranged on the top of the battery cabin and is connected to the perfluorohexanone fire extinguishing bottle group through a connecting pipeline. A plurality of cabin-level nozzles are arranged on the cabin-level spraying pipeline. The main solenoid valve is arranged on the connecting pipeline to control the on and off of all cabin-level nozzles. The main solenoid valve and the cluster-level branch solenoid valve are both electrically connected to the fire host and the unit controller.

3. The energy storage prefabricated cabin fire-fighting device according to claim 2 is characterized in that: The main solenoid valve is arranged in the equipment compartment, at the back of the PCS installation area; The group-level branch solenoid valve is arranged on the back plate of the battery compartment.

4. The energy storage prefabricated cabin fire-fighting device according to claim 1, characterized in that: The water fire fighting system comprises: a sprinkler pipeline and a sprinkler head; The side wall of the energy storage prefabricated cabin is provided with a hose interface; The spray pipeline is connected to the water hose interface, and the plurality of nozzles are arranged on the spray pipeline and located on the top of the battery compartment. The water hose interface is used to connect to an external water source.

5. The energy storage prefabricated cabin fire-fighting device according to claim 1, characterized in that: Also includes: Air intake and exhaust system; The air intake and exhaust system is arranged in the battery compartment, and includes: an air intake and an exhaust port; The control mechanisms of the air inlet and the exhaust port are electrically connected to the fire fighting host respectively.

6. The energy storage prefabricated cabin fire-fighting device according to claim 1, characterized in that: The first battery compartment temperature detector, the first battery compartment smoke detector, the first battery compartment combustible gas detector, the second battery compartment smoke detector and the battery compartment temperature and humidity sensor are all arranged on the front door side of the energy storage prefabricated cabin.

7. A control method for the energy storage prefabricated cabin fire-fighting device according to any one of claims 1 to 6, characterized in that: The following steps are involved: The S1 fire host obtains the environmental data in the battery compartment and the battery pack in real time; S2 determines whether the acquired data triggers the fire threshold. If not, it returns to S1; if yes, it executes the corresponding fire strategy and sends a fire alarm signal to the unit controller; The S3 unit controller obtains the environmental data in the battery compartment and the battery pack in real time; S4 determines whether the acquired data triggers the fire threshold. If not, return to S3; if yes, check whether the fire alarm signal sent by the fire host is received. If yes, return to S3; if not, execute the corresponding fire strategy according to the verification process.

8. The control method of the energy storage prefabricated cabin fire-fighting device according to claim 7 is characterized in that: In step S4, the corresponding fire fighting strategy is executed according to the verification process, specifically including: S41 checks whether the communication between the unit controller and the fire host is normal. If not, go to S411; if yes, go to S412; S411 The unit controller reports a fire communication failure and checks whether there is a fault signal at the dry contact. If yes, go to S4111; if no, go to S4112; The S4111 unit controller takes over the fire protection system; S4112 prompts whether to start the fire protection function of the unit controller? If yes, the unit controller takes over the fire protection system; if no, it reports a fire protection communication failure; S412 detects whether the fault flag is consistent with the dry contact fault signal. If consistent, go to S4121; if inconsistent, go to S4122; If the fault flag and the dry contact fault signal are both normal in S4121, the process returns to S41; if the fault flag and the dry contact fault signal are both faulty, the process goes to S4111; If the fault flag is not faulty and there is a dry contact fault signal in S4122, then return to S41; if the fault flag is faulty and there is no dry contact fault signal, then go to S4111.

9. The control method of the energy storage prefabricated cabin fire-fighting device according to claim 7, characterized in that: In step S2, the fire alarm signal includes: a primary alarm signal and a secondary alarm signal; The first-level alarm signal includes: any single detector trigger alarm and battery management system thermal runaway alarm; The secondary alarm signal includes any one of the following conditions: The first threshold of the combustible gas detector in the first battery compartment + the alarm of the temperature detector in the first battery compartment; The first battery compartment heat detector + the first battery compartment smoke detector alarm; two first battery compartment combustible gas detector second thresholds; Battery management system thermal runaway alarm + any detector alarm; The implementation of corresponding fire fighting strategies includes: When the battery management system alarms for thermal runaway, the cluster-level branch solenoid valve of the cluster where the battery management system is located opens to spray the battery packs of the entire cluster with chemicals; When the detector in the battery compartment triggers the fire alarm, the main solenoid valve opens and sprays the agent on all battery packs.

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