Energy storage battery pack and fire control method of energy storage battery pack

Abstract

The invention provides an energy storage battery pack and a fire control method of the energy storage battery pack, the energy storage battery pack comprises a battery pack, a battery management system and a fire control system, and the battery management system is in communication connection with the fire control system; the fire-fighting control system comprises a fire detection device, a fire-fighting device and a controller. The fire detection device is used for detecting first fire information of the battery pack and sending the first fire information to the controller. The battery management system is used for detecting second fire information of the battery pack and outputting a detection result to the controller; the controller is used for sending a fire extinguishing instruction to the fire fighting device according to the first fire information and the detection result; and the fire-fighting device is used for responding to the fire-fighting fire-extinguishing instruction to prevent a fire in the battery pack. The fire detection device and the BMS are used for double judgment and analysis of the fire condition, and the BMS and the controller of the fire control system are in linkage control, so that the fire control precision of the energy storage battery pack is improved, and the fire safety of the energy storage battery pack is ensured.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to an energy storage battery pack and a fire control method for the energy storage battery pack. Background Art

[0002] With the development of smart grid construction, the demand for battery energy storage continues to increase. Energy storage battery packs are widely used. Due to the limitations of energy density and space, energy storage battery packs are generally arranged relatively closely, and there is no staff to monitor the working status of the energy storage battery pack in real time, which is easy to cause fire and explosion accidents. Therefore, providing an energy storage battery pack with a fire control function is of great significance to ensure the safe operation of the energy storage battery pack.

[0003] In the related technology, energy storage batteries usually detect and extinguish fires through smoke sensors in conjunction with sprinkler cooling systems. However, smoke sensors have low accuracy, fire detection is not accurate enough, and there are problems such as inability to accurately extinguish fires or effectively suppress thermal runaway. Summary of the invention

[0004] The embodiments of the present invention provide an energy storage battery pack and a fire control method for the energy storage battery pack, which can accurately detect fires, realize fire extinguishing at the battery pack level, and ensure the fire safety of the energy storage battery pack.

[0005] In a first aspect, an embodiment of the present invention provides an energy storage battery pack, the energy storage battery pack comprising: a battery pack, a battery management system and a fire control system, the battery management system being communicatively connected with the fire control system;

[0006] The fire control system comprises a fire detection device, a fire fighting device and a controller, wherein the fire detection device is used to detect first fire information of the battery pack and send the first fire information to the controller;

[0007] The battery management system is used to detect the second fire information of the battery pack and output the detection result to the controller;

[0008] The controller is used to send a fire extinguishing instruction to the fire fighting device according to the first fire information and the detection result;

[0009] The fire-fighting device is used to respond to the fire-fighting extinguishing instruction to prevent a fire from occurring in the battery pack.

[0010] In a second aspect, an embodiment of the present invention provides a fire control method for an energy storage battery pack, wherein the energy storage battery pack includes a battery pack, and the fire control method for the energy storage battery pack includes:

[0011] Acquiring first fire information of the battery pack;

[0012] Acquire second fire information of the battery pack and a detection result corresponding to the second fire information;

[0013] According to the first fire information and the detection result, a fire extinguishing instruction is sent to a fire fighting device in the battery pack to prevent a fire from occurring in the battery pack.

[0014] In a third aspect, an embodiment of the present invention provides a fire control device of the energy storage battery pack, wherein the energy storage battery pack includes a battery pack, and the fire control device of the energy storage battery pack includes:

[0015] A first acquisition module, used to acquire first fire information of the battery pack;

[0016] A second acquisition module, used to acquire second fire information of the battery pack and a detection result corresponding to the second fire information;

[0017] A control module is used to send a fire extinguishing instruction to the fire fighting device in the battery pack according to the first fire information and the detection result, so as to prevent a fire from occurring in the battery pack.

[0018] In a fourth aspect, an embodiment of the present invention provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps in the fire control method of the above-mentioned energy storage battery pack are implemented.

[0019] In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps in the fire control method of the above-mentioned energy storage battery pack are implemented.

[0020] In a sixth aspect, an embodiment of the present invention provides a computer program product, including a computer program / instruction, which, when executed by a processor, is used to execute the steps in the fire control method of the above-mentioned energy storage battery pack.

[0021] Beneficial effects of the embodiments of the present invention:

[0022] In the embodiments of the present invention, dual judgment and analysis of the fire situation are performed by the fire detection device and the BMS, and the controller of the BMS and the fire control system are controlled in linkage, thereby improving the fire control accuracy of the energy storage battery pack. In addition, since the protection accuracy is improved to the battery pack level, the fire control is implemented at the root of the battery system fire, thereby ensuring the fire safety of the energy storage battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a structural schematic diagram of an energy storage battery pack provided in an embodiment of the present application;

[0025] Figure 2 It is a front view of a fire control system provided in an embodiment of the present application;

[0026] Figure 3 It is a left view of a fire control system provided in an embodiment of the present application;

[0027] Figure 4 is a top view of a fire control system provided in an embodiment of the present application;

[0028] Figure 5 Another structural diagram of the energy storage battery pack in the embodiment of the present application is

[0029] Figure 6 is a flow chart of the fire control process of the energy storage battery pack provided in the embodiment of the present application;

[0030] Figure 7 is a schematic diagram of the arrangement of the pressure detectors provided in the embodiment of the present application;

[0031] Figure 8 is another schematic diagram of the arrangement of the pressure detectors provided in the embodiments of the present application;

[0032] Fig. 9 It is a schematic flow chart of an embodiment of a fire control method for an energy storage battery pack provided in an embodiment of the present application;

[0033] Fig.10 It is a schematic diagram of the structure of an embodiment of a fire control device of an energy storage battery pack provided in an embodiment of the present application;

[0034] Fig.11 It is a schematic diagram of the structure of an embodiment of an electronic device provided in the embodiments of the present application. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device.

[0036] Energy storage safety is a key link in energy storage systems. Sodium-ion batteries are a popular direction for new energy storage. Equipped with sodium-ion energy storage battery packs with fire control functions, they are the guarantee for the stable and safe operation of sodium-ion energy storage systems, which will help further promote sodium-ion energy storage technology. At present, fire control systems used for electrochemical energy storage are generally designed based on lithium-ion battery systems, and there is no mature solution for fire control systems specifically adapted to sodium-ion battery systems. Sodium-ion batteries differ from lithium-ion batteries in terms of material thermal stability and thermal runaway characteristics. It is not the optimal solution to completely copy the fire protection solution of lithium-ion battery systems. For example, smoke sensors are used in conjunction with sprinkler cooling systems for detection and fire extinguishing. However, smoke sensors have the problem of low precision, fire detection is not accurate enough, and there are problems such as inability to accurately extinguish fires or effectively suppress thermal runaway.

[0037] In view of this, the present application proposes an energy storage battery pack and a fire control method for an energy storage battery pack, so as to improve the thermal runaway protection accuracy to the battery pack level, implement fire control at the root of the battery system fire, improve the fire control accuracy of the energy storage battery pack, and ensure the fire safety of the energy storage battery pack.

[0038] Reference Figure 1-Figure 4 , Figure 1 Schematic diagram of the structure of an energy storage battery pack. The energy storage battery pack includes: a battery pack 110, a battery management system 120 and a fire control system 130, and the battery management system 120 is in communication connection with the fire control system 130.

[0039] The battery pack 110 is the core part of the energy storage battery pack, which includes multiple battery cells or battery modules 1101 for storing electrical energy. The battery type can be a lithium-ion battery, a lead-acid battery, a nickel-cadmium battery, or a sodium-ion battery.

[0040] The battery management system 120 (BMS) is mainly used for intelligent management and maintenance of each battery unit, and is used to monitor the status of battery cells or battery modules in the battery pack, such as battery voltage, current, temperature, state of charge (SOC), state of health (SOH), etc.

[0041] The fire control system includes a fire detection device, a fire fighting device and a controller. The fire detection device is used to detect first fire information of the battery pack and send the first fire information to the controller.

[0042] Among them, the fire control system 130 includes a fire detection device 1301, a fire fighting device 1302 and a controller 1303. The fire detection device 1301 is used to detect information or signals and other data related to fire safety during the operation of the battery pack 110. The fire fighting device 1302 is used to perform fire fighting control on the battery pack 110 at the PACK (battery pack) level, which can be a hierarchical fire fighting control. For example, for fire situations of different severity, fire fighting control can be performed by means of alarm prompts, alarm prompts and simultaneous fire fighting, alarm prompts and gas reduction measures. The controller 1303 is the core part of the fire control system 130, and is used to receive the first fire information detected by the fire detection device 1301, and convert and process it, and generate a fire fighting control and fire fighting extinguishing instruction according to the processing result, so as to realize automatic initiation of fire fighting control. Figure 2 As shown in FIG. 1 , it is a front view of the fire control system; Figure 3 The figure below shows the left side view of the fire control system. Figure 4 Shown is a top view of the fire control system.

[0043] Among them, the first fire information is data related to thermal runaway in the battery pack detected by the fire detection device 1301, such as the temperature and gas concentration in the battery pack.

[0044] Specifically, the fire detection device 1301 detects the first fire information of the battery pack 110 and sends the first fire information to the controller 1303, so that the controller 1301 automatically starts the fire control function according to the received first fire information, implements the fire control of the battery pack, and ensures the fire safety of the energy storage battery pack.

[0045] The battery management system is used to detect second fire information of the battery pack and output the detection result to the controller.

[0046] The second fire information is data related to thermal runaway in the battery pack detected by the BMS 120, such as the temperature, voltage, state of charge, and health status in the battery pack.

[0047] Specifically, the BMS 120 analyzes the detected second fire information to determine whether there is an abnormality, for example, by comparing each type of data in the second fire information with a corresponding threshold value to determine whether there is an abnormality, and obtains a detection result. It can be understood that in this embodiment, by acquiring the second fire information of the detected battery pack 110 and outputting the detection result to the controller 1303, so as to provide a reference for the subsequent determination of the fire control strategy based on the second fire information and the detection result, it is conducive to improving the accuracy of the determination of the fire control strategy.

[0048] The controller is used to send a fire extinguishing instruction to the fire fighting device according to the first fire information and the detection result.

[0049] Specifically, the controller 1303 analyzes the fire situation of the battery pack 110 according to the first fire information and the detection result, determines the fire control strategy according to the analysis result, and sends a fire extinguishing instruction to the fire-fighting device 1302 to control the fire-fighting device 1302 to implement the fire control strategy to ensure the fire safety of the battery pack. It can be understood that in this embodiment, the fire control strategy of the battery pack is determined according to the first fire information and the detection result at the same time, and a double judgment analysis based on the data detected by the fire detection device 1301 and the BMS120 is realized, thereby realizing the linkage control of the BM120S and the fire control system 130, improving the accuracy of the fire detection of the battery pack, and facilitating the improvement of the fire control accuracy, thereby realizing accurate fire extinguishing or effectively suppressing the thermal runaway in the battery pack, and improving the fire safety of the energy storage battery pack.

[0050] The fire-fighting device is used to respond to the fire-fighting extinguishing instruction to prevent a fire from occurring in the battery pack.

[0051] Specifically, when the fire-fighting device 1302 receives the fire-fighting extinguishing instruction sent by the controller 1303 , it activates the fire-fighting extinguishing function to perform fire-fighting extinguishing treatment on the battery pack to prevent a fire from occurring in the battery pack 110 .

[0052] The above-mentioned energy storage battery pack performs dual judgment and analysis of the fire situation through the fire detection device and BMS. The BMS and the controller of the fire control system are controlled in linkage, which improves the fire control accuracy of the energy storage battery pack. In addition, since the protection accuracy is improved to the battery pack level, the fire control is implemented at the root of the battery system fire, ensuring the fire safety of the energy storage battery pack.

[0053] It should be noted that the energy storage battery pack in the embodiment of the present application can not only be adapted to the sodium-ion battery system, but can also be used for fire protection of the lithium-ion battery system, and has a high degree of industrial flexibility and adaptability.

[0054] Reference Figure 5In some embodiments, the fire detection device 1301 includes at least two of a first gas detector 13011 for detecting a first gas concentration in the battery pack, a second gas detector 13012 for detecting a second gas concentration in the battery pack, a third gas detector 13013 for detecting a third gas concentration in the battery pack, a pressure detector for detecting an expansion force in the battery pack, a sound detector 13014 for detecting a sound in the battery pack, and a temperature detector 13015 for detecting a temperature in the battery pack.

[0055] The first gas, the second gas and the third gas may be hydrogen, carbon monoxide and organic compound gas (VOC) respectively.

[0056] The pressure detector is used to detect the expansion force inside the battery pack. Since the battery cells in the battery pack will experience increased expansion force in the early stages of thermal runaway, the first fire information of the battery pack can be detected as soon as possible by setting up a pressure detector.

[0057] The sound detector 13014 is used to detect sounds of a specific frequency. Since the battery cells of the battery pack may abnormally open when thermal runaway occurs, the first fire information of the battery pack can be detected immediately by setting up a sound detector.

[0058] Specifically, the fire detection device includes at least two of a first gas detector, a second gas detector, a third gas detector, a pressure detector, a sound detector, and a temperature detector. The number of the first gas detector, the second gas detector, and the third gas detector can be at least one, which can be installed on the top of the energy storage battery pack, and can detect gas concentration more efficiently, which is conducive to improving the accuracy of fire situation analysis. In this embodiment, in combination with the state change of the battery cell during thermal runaway, a sound detector and a pressure detector are set, which is conducive to ensuring the comprehensive multidimensionality of the first fire information, and thus is conducive to the accuracy of the subsequent fire situation analysis based on the comprehensive multidimensional first fire information.

[0059] like Figure 5 As shown, it is another structural schematic diagram of the energy storage battery pack, including a maintenance window 150, a battery pack housing 160, a battery pack bottom plate 170, a fuse 180, a manual maintenance switch 190 (Manual Service Disconnect, MSD), a wiring harness socket 210, and positive and negative pole sockets 220.

[0060] It is worth noting that compared with lithium-ion batteries, the gas production rate and gas production volume of sodium-ion batteries during thermal runaway are much smaller than those of lithium-ion batteries. Therefore, rigidly copying the traditional lithium battery fire detection strategy cannot meet the needs of sodium-ion batteries for higher detection accuracy, resulting in the inability to detect early thermal runaway phenomena of sodium-ion batteries. In this embodiment, the fire detection device includes at least two of a first gas detector, a second gas detector, a third gas detector, a pressure detector, a sound detector, and a temperature detector, which improves the detection accuracy of the fire detection device and can also be applied to sodium-ion battery systems, with wide adaptability.

[0061] The first fire information includes at least two of the first gas concentration, the second gas concentration, the third gas concentration, expansion force, sound, and temperature.

[0062] Specifically, the first fire information includes at least two of the first gas concentration, the second gas concentration, the third gas concentration, expansion force, sound and temperature, which can ensure that the first fire information is richer and more comprehensive, thereby facilitating the accuracy of subsequent fire situation analysis based on the comprehensive and multi-dimensional first fire information.

[0063] The second fire information includes current status information of the battery pack, and the current status information includes at least one of current temperature, current voltage, current state of charge, and current health status, and the detection result includes one of normal and abnormal; the controller is used to determine the fire level of the battery pack according to the first fire information and the detection result, and send a fire extinguishing instruction to the fire fighting device according to the fire level.

[0064] The second fire information includes the current state information of the battery pack, and the current state information includes at least one of the current temperature, current voltage, current state of charge (SOC), and current state of health (SOH). If each item in the current state information is normal, the detection result is determined to be normal, otherwise, the detection result is determined to be abnormal.

[0065] The controller is used to determine the fire level of the battery pack according to the first fire information and the detection result, and send a fire extinguishing instruction to the fire fighting device according to the fire level.

[0066] Specifically, the controller can determine the fire level of the battery pack based on the first fire information and the detection result, that is, determine the fire level by combining the first fire information and the normal and abnormal conditions in the detection result. For example, the first severity of the fire can be determined based on the first fire information, and the second severity of the fire can be determined based on the detection result, and the fire level can be determined by a comprehensive analysis based on the first severity and the second severity. The comprehensive analysis can be to determine the fire level by performing a weighted sum calculation on the first severity and the second severity; or it can be to determine the fire level by comparing the first severity and the second severity according to the comparison result. Exemplarily, if the first severity is a minor fire and the second severity is characterized by normal operation, then the second severity can be determined as the fire level, which can avoid the situation where the detector sensitivity is too high and a false alarm occurs.

[0067] Since the fire protection strategy requires dual judgment of detection warning and BMS battery status, false alarms caused by excessive detector sensitivity are avoided, ensuring the normal operation of the energy storage battery pack and improving the working efficiency of the energy storage battery pack.

[0068] After determining the fire level, different fire-fighting measures are selected according to the fire level of the battery pack, that is, fire-fighting instructions matching the fire level are sent to the corresponding fire-fighting devices.

[0069] It can be understood that in this embodiment, the fire level of the battery pack is determined in combination with the first fire information and the detection result, that is, the fire level is analyzed by dual determination of the fire situation through the fire detection device and the BMS, thereby realizing the linkage control of the controller of the BMS and the fire control system, and improving the fire control accuracy of the energy storage battery pack.

[0070] Reference Figure 2-Figure 4In some embodiments, the fire fighting device includes a fire extinguishing module and an alarm module, and the fire extinguishing module includes a pressure relief unit and a fire extinguishing unit; the controller is used to determine the fire level of the battery pack according to the first fire information and the detection result, including: if any one of the first gas concentration, the second gas concentration, the third gas concentration, the expansion force, the sound and the temperature is abnormal, and the detection result is normal, the fire level is determined to be a third-level fire; and control the alarm module and / or the battery management system to issue a third-level warning signal; if at least one of the hydrogen concentration, the carbon monoxide concentration, the organic compound gas concentration, the expansion force, the sound and the temperature is abnormal, the fire level is determined to be a third-level fire. If two of them are abnormal and the detection result is normal, or if any one of the first gas concentration, the second gas concentration, the third gas concentration, the expansion force, the sound and the temperature is abnormal and the detection result is abnormal, the fire level is determined to be a level 2 fire; and the alarm module is controlled to send a level 2 alarm signal, and the pressure relief unit is controlled to open to relieve the pressure of the battery pack; if at least two of the first gas concentration, the second gas concentration, the third gas concentration, the expansion force, the sound and the temperature are abnormal and the detection result is abnormal, the fire level is determined to be a level 1 fire; and the alarm module is controlled to send a level 1 protection signal, and the fire extinguishing unit is controlled to start fire extinguishing.

[0071] The fire-fighting device 1302 includes a fire-extinguishing module 13021 and an alarm module (not shown in the figure), and the fire-extinguishing module 13021 includes a pressure relief unit 13021A and a fire-extinguishing unit 13021B.

[0072] The alarm module is a module for sending out alarm signals, for example, it can be a combination of a voice alarm, an audible and visual alarm, and a bell alarm. The fire extinguishing module is a module for extinguishing a fire in a battery pack, including a fire extinguishing unit 13021B and a pressure relief unit 13021A.

[0073] The fire extinguishing unit 13021B may be a gas fire extinguishing device. The gas fire extinguishing device may be fixed to the maintenance window of the energy storage battery pack. The gas fire extinguishing device may use aerosol or perfluorohexanone fire extinguishing agent, non-pressure storage mode, and may be triggered by thermal start or electric start.

[0074] The pressure relief unit 13021A may be an electrically controlled safety valve, which may be provided on the battery pack housing. The pressure relief unit 13021A is used to discharge the internal gas of the battery pack 110 to achieve pressure relief and reduce the concentration of thermal runaway gas.

[0075] Specifically, the first gas concentration, the second gas concentration, the third gas concentration, the expansion force, the sound and the temperature are all pre-configured with corresponding thresholds for determining whether each data in the first fire information is abnormal.

[0076] If any one of the first gas concentration, the second gas concentration, the third gas concentration, the expansion force, the sound and the temperature is abnormal, and the detection result is normal, it indicates that the thermal runaway in the battery pack is slight at this time, and the fire level is determined to be a third-level fire. The control alarm module and / or the battery management system will issue a third-level warning signal to alert the staff and no fire extinguishing measures are required.

[0077] If at least two of the first gas concentration, the second gas concentration, the third gas concentration, the expansion force, the sound and the temperature are abnormal and the detection result is normal, or any one of the first gas concentration, the second gas concentration, the third gas concentration, the expansion force, the sound and the temperature is abnormal and the detection result is abnormal, the fire level is determined to be a secondary fire, indicating that the thermal runaway phenomenon in the battery pack is generally serious at this time, and the fire level is determined to be a secondary fire. The alarm module is controlled to send a secondary alarm signal, and the pressure relief unit is controlled to open to exhaust and relieve the pressure of the battery pack, reduce the gas concentration of the battery pack, and avoid fire.

[0078] At least two of the first gas concentration, the second gas concentration, the third gas concentration, the expansion force, the sound and the temperature are abnormal and the detection result is abnormal, and the fire level is determined to be a level one fire, indicating that the thermal runaway phenomenon in the battery pack is relatively serious at this time. The fire level is determined to be a level one fire, and the alarm module is controlled to send a level one protection signal, and the fire extinguishing unit is controlled to start the fire extinguishing, so as to implement fire extinguishing measures on the battery pack to avoid fire and explosion in the battery pack and ensure the fire safety of the battery pack.

[0079] In a specific embodiment, Figure 6The figure shows a flow chart of the fire control process of the energy storage battery pack. A single abnormal signal is detected in the battery pack, triggering a three-level warning signal, and the BMS reminds the staff to be vigilant; the BMS self-checks the battery system status information (voltage, temperature, SOC, SOH, etc.). If there is no abnormality in the BMS self-check, the three-level warning signal state is maintained until the abnormal signal disappears. If any abnormal signal appears in the BMS self-check, the second-level alarm signal state is triggered, and the alarm module sends an alarm signal to remind the personnel, and controls the opening of the battery pack electronically controlled safety valve to discharge the gas inside the battery pack to achieve the effect of pressure relief and reducing the concentration of thermal runaway gas. If any abnormal signal is added, the first-level protection signal is triggered, and the control module sends an alarm signal to remind the personnel. At the same time, the sound and light alarm and the alarm bell sound, the electric safety valve is closed, and the fire-fighting device executes the fire-fighting action of the battery pack-level fire-fighting device, and releases the pack-level fire-fighting agent to extinguish the fire. A composite abnormal signal is detected in the battery pack, triggering a secondary alarm signal. The alarm module sends an alarm signal to remind personnel, and the battery pack's electronically controlled safety valve opens to exhaust and release pressure. If there is an abnormality in the BMS self-test at this time, the primary protection signal is triggered, and the control module sends an alarm signal to remind personnel. At the same time, the sound and light alarm and the alarm sound, the electric safety valve closes, and the fire extinguishing at the battery pack level is executed, realizing the improvement of the protection control accuracy to the battery pack level, and implementing the fire control at the root of the battery system fire, ensuring the fire safety of the electric energy storage battery pack.

[0080] In some embodiments, if the fire level is determined to be a level one fire after the pressure relief unit is controlled to be turned on to relieve the pressure of the battery pack, the pressure relief unit is controlled to be turned off, and the alarm module is controlled to send a level one protection signal, and the fire extinguishing unit is controlled to start fire extinguishing.

[0081] Specifically, if after the pressure relief unit is controlled to open to exhaust and relieve pressure from the battery pack, it is determined that the fire level is a level one fire, that is, the fire control measure of exhausting and relieving pressure from the battery pack fails to effectively suppress thermal runaway, then exhausting and relieving pressure from the battery pack is stopped, and the fire extinguishing unit is directly controlled to start fire extinguishing to implement fire extinguishing measures on the battery pack to ensure the fire safety of the battery pack, and closing the pressure relief unit can keep the interior of the battery pack closed to avoid overflow of the fire extinguishing agent from the safety valve when using a gas fire extinguishing agent for fire extinguishing, thereby affecting the density of the fire extinguishing agent and improving the fire extinguishing effect.

[0082] In some embodiments, the fire fighting device further includes a fire extinguishing unit, and the fire extinguishing unit includes at least one of an aerosol fire extinguishing unit and a perfluorohexanone fire extinguishing agent; the energy storage battery pack further includes:

[0083] A thermal start trigger component is arranged in the battery pack, and the thermal start trigger component is used to start the fire extinguishing unit to extinguish the battery pack when it is detected that the temperature inside the battery pack is greater than a preset upper limit temperature.

[0084] Wherein, the fire extinguishing unit is a gas fire extinguishing unit, including at least one of an aerosol fire extinguishing unit and a perfluorohexanone fire extinguishing agent.

[0085] Specifically, a hot start trigger component is also arranged in the battery pack, which is used to start the fire extinguishing unit to extinguish the fire of the battery pack when it detects that the temperature inside the battery pack is greater than the preset upper limit temperature, thereby realizing the hot start of the fire extinguishing unit and achieving timely response. The hot start trigger component starts the fire extinguishing unit in a passive physical start mode, avoiding the failure of timely fire extinguishing when the electrical signal trigger mode of the fire extinguishing unit fails, thereby improving the reliability of fire control of the energy storage battery pack.

[0086] Referring to 4, in some embodiments, the thermal start trigger component includes a thermal wire 140, and the thermal wire 140 is arranged in a serpentine shape along the center position of each explosion-proof valve close to the battery pack.

[0087] The thermal start trigger component may be a thermistor, which is connected to the fire extinguishing unit 13021B. In the early stage of thermal runaway of the battery pack, the explosion-proof valve on the battery pack 110 begins to exhaust gas, and the temperature near the explosion-proof valve rises rapidly. The thermistor is arranged in a serpentine shape along the center of each explosion-proof valve close to the battery pack, so that the temperature rise can be accurately sensed, and the thermistor can be triggered in time to start the fire extinguishing unit, respond in time, and achieve efficient fire extinguishing.

[0088] Reference Figure 7 and Figure 8 In some embodiments, if the detection device includes the pressure detector, the pressure detector is arranged between the large surfaces of two adjacent battery cells of the battery pack, or between the battery module in the battery pack and the module end plate of the battery module.

[0089] Specifically, the pressure detector 13016 is disposed between the large surfaces of two adjacent battery cells 11011 of the battery pack, or between the battery module 1101 in the battery pack 110 and the module end plate 1102 of the battery module. Since the battery cells 11011 of the battery pack will experience increased expansion force in the early stage of thermal runaway, the pressure detector 13016 is disposed between the large surfaces of two adjacent battery cells 11011 of the battery pack. This allows the pressure to be detected immediately and accurately. At this time, the number of pressure detectors is (the number of battery cells contained in a single battery module - 1) * the number of battery module groups. The pressure detector is disposed between the battery module in the battery pack and the module end plate of the battery module. At this time, the number of pressure sensors is 2 * the number of battery module groups, which can reduce the number of pressure detectors and reduce costs. Figure 7 and Figure 8 As shown, this is a schematic diagram of the layout of the pressure detector.

[0090] In some embodiments, the controller is electrically connected to a display unit, and the display unit is arranged outside the energy storage battery pack, and is used to control the fire control system to select a manual fire extinguishing start mode or an automatic fire extinguishing start mode; in the manual fire extinguishing start mode, the controller sends an alarm signal and does not output a control signal, and reminds the staff to perform a manual start operation through the manual fire extinguishing start mode on the display unit.

[0091] Among them, the display unit can be a display box, on which an emergency start-stop button can be set. The display unit controls the fire control system to select manual fire extinguishing start mode or automatic fire extinguishing start mode; in the manual fire extinguishing start mode, the controller sends out an alarm signal and does not output a control signal. The manual fire extinguishing start mode on the display unit reminds the staff to perform manual start operations, such as background or remote manual start of the fire control system for fire control, so that the energy storage battery pack fire control can support manual and automatic modes, thereby improving the adaptability of the energy storage battery pack.

[0092] In some embodiments, the first gas, the second gas, and the third gas are hydrogen, carbon monoxide, and an organic compound gas, respectively; the accuracy of the first gas detector, the second gas detector, and the third gas detector are less than or equal to 100ppm, 50ppm, and 100ppm, respectively.

[0093] Specifically, since sodium-ion batteries mainly produce hydrogen, carbon monoxide and volatile organic compound gases (VOCs) including methane and ethylene during thermal runaway, corresponding gas detectors are configured in the battery pack and set with a higher detection accuracy than that of lithium batteries. That is, the accuracy of the first gas detector corresponding to hydrogen, the second gas detector corresponding to carbon monoxide, and the third gas detector corresponding to organic compound gas are less than or equal to 100ppm, 50ppm, and 100ppm, respectively. This can meet the scenarios of sodium-ion batteries, enable the energy storage battery pack to meet the fire control of different battery types, and improve the adaptability of the energy storage battery pack in the battery industry.

[0094] like Fig. 9 As shown, the embodiment of the present application also provides a fire control method for an energy storage battery pack, and the fire control method for the energy storage battery pack is applied to Figure 1 The energy storage battery pack includes a battery pack, and the fire control method of the energy storage battery pack includes:

[0095] S101, obtaining first fire information of the battery pack;

[0096] S102, obtaining second fire information of the battery pack and a detection result corresponding to the second fire information;

[0097] S103: Send a fire extinguishing instruction to a fire fighting device in the battery pack according to the first fire information and the detection result to prevent a fire from occurring in the battery pack.

[0098] For descriptions of the first fire information, the second fire information, and the detection results corresponding to the second fire information, please refer to the relevant descriptions of the above embodiments, which will not be repeated here.

[0099] Specifically, according to the first fire information and the detection result, a fire extinguishing instruction is sent to the fire fighting device in the battery pack to prevent a fire from occurring in the battery pack, that is, the fire level is determined by combining the first fire information and the normal and abnormal conditions in the detection result. For example, the first severity of the fire can be determined according to the first fire information, and the second severity of the fire can be determined according to the detection result, and the fire level is determined by a comprehensive analysis based on the first severity and the second severity. The comprehensive analysis can be to determine the fire level by weighted sum calculation of the first severity and the second severity; or to determine the fire level by comparing the first severity and the second severity according to the comparison result. Exemplarily, if the first severity is a minor fire and the second severity is characterized by normal operation, the second severity can be determined as the fire level. It can be understood that in this embodiment, the fire control strategy of the energy storage battery pack is determined by combining the first fire information and the detection result. Compared with the traditional method of determining the fire control strategy based on temperature and smoke concentration, the fire control accuracy is greatly improved and the fire control effect of the energy storage battery pack is improved.

[0100] like Fig.10 As shown, the embodiment of the present application further provides a fire control device 200 of an energy storage battery pack, wherein the energy storage battery pack includes a battery pack, and the fire control device 200 of the energy storage battery pack includes:

[0101] A first acquisition module 201, used to acquire first fire information of the battery pack;

[0102] A second acquisition module 202, used to acquire second fire information of the battery pack and a detection result corresponding to the second fire information;

[0103] The control module 203 is used to send a fire extinguishing instruction to the fire fighting device in the battery pack according to the first fire information and the detection result, so as to prevent a fire from occurring in the battery pack.

[0104] The embodiment of the present application further provides an electronic device, which integrates a fire control device of any energy storage battery pack provided in the embodiment of the present application, and the electronic device includes:

[0105] one or more processors;

[0106] Memory; and

[0107] One or more applications, wherein the one or more applications are stored in the memory and are configured to be executed by the processor in the fire control method for the energy storage battery pack described in any of the above-mentioned fire control method embodiments for the energy storage battery pack.

[0108] The present application also provides an electronic device that integrates a fire control device of any energy storage battery pack provided in the present application. Fig.11 As shown, it shows a schematic diagram of the structure of the electronic device involved in the embodiment of the present application, specifically:

[0109] The electronic device may include components such as a processor 301 with one or more processing cores, a memory 302 with one or more computer-readable storage media, a power supply 303, and an input unit 304. Those skilled in the art will appreciate that Fig.11 The electronic device structure shown in the figure does not constitute a limitation on the electronic device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0110] The processor 301 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 302, and calling data stored in the memory 302, it executes various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. Optionally, the processor 301 may include one or more processing cores; preferably, the processor 301 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 301.

[0111] The memory 302 can be used to store software programs and modules. The processor 301 executes various functional applications and data processing by running the software programs and modules stored in the memory 302. The memory 302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 302 may also include a memory controller to provide the processor 301 with access to the memory 302.

[0112] The electronic device also includes a power supply 303 for supplying power to each component. Preferably, the power supply 303 can be logically connected to the processor 301 through a power management system, so that the power management system can manage charging, discharging, power consumption and other functions. The power supply 303 can also include one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, power status indicators and other arbitrary components.

[0113] The electronic device may further include an input unit 304, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0114] Although not shown, the electronic device may further include a display unit, etc., which will not be described in detail herein. Specifically in this embodiment, the processor 301 in the electronic device will load the executable files corresponding to the processes of one or more application programs into the memory 302 according to the following instructions, and the processor 301 will run the application programs stored in the memory 302, thereby realizing various functions, as follows:

[0115] Acquiring first fire information of the battery pack;

[0116] Acquire second fire information of the battery pack and a detection result corresponding to the second fire information;

[0117] According to the first fire information and the detection result, a fire extinguishing instruction is sent to a fire fighting device in the battery pack to prevent a fire from occurring in the battery pack.

[0118] A person of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed by instructions, or by controlling related hardware through instructions. The instructions may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0119] To this end, an embodiment of the present application provides a computer-readable storage medium, which may include: a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc. A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in any fire control method of an energy storage battery pack provided in the embodiment of the present application. For example, the computer program can be loaded by a processor to execute the following steps:

[0120] Acquiring first fire information of the battery pack;

[0121] Acquire second fire information of the battery pack and a detection result corresponding to the second fire information;

[0122] According to the first fire information and the detection result, a fire extinguishing instruction is sent to a fire fighting device in the battery pack to prevent a fire from occurring in the battery pack.

[0123] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above, and will not be repeated here.

[0124] In specific implementation, the above units or structures can be implemented as independent entities, or can be arbitrarily combined to be implemented as the same or several entities. The specific implementation of the above units or structures can refer to the previous method embodiments, which will not be repeated here.

[0125] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. An energy storage battery pack, characterized in that: The energy storage battery pack includes: a battery pack, a battery management system and a fire control system, and the battery management system is communicatively connected with the fire control system; The fire control system comprises a fire detection device, a fire fighting device and a controller, wherein the fire detection device is used to detect first fire information of the battery pack and send the first fire information to the controller; The battery management system is used to detect the second fire information of the battery pack and output the detection result to the controller; The controller is used to send a fire extinguishing instruction to the fire fighting device according to the first fire information and the detection result; The fire-fighting device is used to respond to the fire-fighting extinguishing instruction to prevent a fire from occurring in the battery pack.

2. The energy storage battery pack according to claim 1, characterized in that: The fire detection device includes at least two of a first gas detector for detecting a first gas concentration in the battery pack, a second gas detector for detecting a second gas concentration in the battery pack, a third gas detector for detecting a third gas concentration in the battery pack, a pressure detector for detecting an expansion force in the battery pack, a sound detector for detecting a sound in the battery pack, and a temperature detector for detecting a temperature in the battery pack; The first fire information includes at least two of the first gas concentration, the second gas concentration, the third gas concentration, expansion force, sound and temperature; The second fire information includes current state information of the battery pack, the current state information includes at least one of current temperature, current voltage, current state of charge, and current health state, and the detection result includes one of normal and abnormal; The controller is used to determine the fire level of the battery pack according to the first fire information and the detection result, and send a fire extinguishing instruction to the fire fighting device according to the fire level.

3. The energy storage battery pack according to claim 2, characterized in that: The fire fighting device includes a fire extinguishing module and an alarm module, and the fire extinguishing module includes a pressure relief unit and a fire extinguishing unit; the controller is used to determine the fire level of the battery pack according to the first fire information and the detection result, including: If any one of the hydrogen concentration, carbon monoxide concentration, organic compound gas concentration, expansion force, sound and temperature is abnormal, and the detection result is normal, the fire level is determined to be a third-level fire; and the alarm module and / or the battery management system is controlled to issue a third-level warning signal; If at least two of the first gas concentration, the second gas concentration, the third gas concentration, the expansion force, the sound and the temperature are abnormal and the detection result is normal, or if any one of the first gas concentration, the second gas concentration, the third gas concentration, the expansion force, the sound and the temperature is abnormal and the detection result is abnormal, the fire level is determined to be a level 2 fire; and the alarm module is controlled to send a level 2 alarm signal, and the pressure relief unit is controlled to open to relieve the exhaust pressure of the battery pack; If at least two of the first gas concentration, the second gas concentration, the third gas concentration, the expansion force, the sound and the temperature are abnormal and the detection result is abnormal, the fire level is determined to be a level one fire; and the alarm module is controlled to send a level one protection signal to control the fire extinguishing unit to start fire extinguishing.

4. The energy storage battery pack according to claim 3, characterized in that: If the fire level is determined to be a level one fire after the pressure relief unit is controlled to be turned on to relieve the pressure of the battery pack, the pressure relief unit is controlled to be turned off, the alarm module is controlled to send a level one protection signal, and the fire extinguishing unit is controlled to start fire extinguishing.

5. The energy storage battery pack according to claim 1, characterized in that: The fire-fighting device further includes a fire-extinguishing unit, which includes at least one of an aerosol fire-extinguishing unit and a perfluorohexanone fire-extinguishing agent; the energy storage battery pack further includes: A thermal start trigger component is arranged in the battery pack, and the thermal start trigger component is used to start the fire extinguishing unit to extinguish the battery pack when it is detected that the temperature inside the battery pack is greater than a preset upper limit temperature.

6. The energy storage battery pack according to claim 5, characterized in that: The thermal start trigger component includes a thermosensitive wire, which is arranged in a serpentine shape along the center position of each explosion-proof valve close to the battery pack.

7. The energy storage battery pack according to claim 2, characterized in that: If the detection device includes the pressure detector, the pressure detector is arranged between the large surfaces of two adjacent battery cells of the battery pack, or between a battery module in the battery pack and a module end plate of the battery module.

8. The energy storage battery pack according to claim 2, characterized in that: The controller is electrically connected to a display unit, which is arranged outside the energy storage battery pack and is used to control the fire control system to select a manual fire extinguishing start mode or an automatic fire extinguishing start mode; In the manual fire extinguishing start mode, the controller sends out an alarm signal but does not output a control signal, and reminds the staff to perform a manual start operation through the manual fire extinguishing start mode on the display unit.

9. The energy storage battery pack according to claim 2, characterized in that: The first gas, the second gas and the third gas are hydrogen, carbon monoxide and organic compound gas respectively; the accuracy of the first gas detector, the second gas detector and the third gas detector are less than or equal to 100ppm, 50ppm and 100ppm respectively.

10. A fire control method for an energy storage battery pack, characterized in that: The energy storage battery pack includes a battery pack, and the fire control method of the energy storage battery pack includes: Acquiring first fire information of the battery pack; Acquire second fire information of the battery pack and a detection result corresponding to the second fire information; According to the first fire information and the detection result, a fire extinguishing instruction is sent to a fire fighting device in the battery pack to prevent a fire from occurring in the battery pack.

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