Early warning strategy determination method and device, storage medium and electronic device

Abstract

The invention discloses an early warning strategy determination method and device, a storage medium and an electronic device, and the method comprises the steps: receiving pressure data collected by a pressure sensor according to a preset frequency through a battery management system, and enabling the pressure sensor to be disposed in a battery module in an energy storage power station, the energy storage power station is provided with the battery management system; determining the pressure change rate of the battery module according to the received two adjacent pressure data; and determining an early warning strategy for the battery module through the pressure change rate. The problem that an existing energy storage power station safety early warning method cannot conduct early warning at the initial stage of thermal runaway is solved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a method and device for determining an early warning strategy, a storage medium, and an electronic device. Background Art

[0002] With the acceleration of energy transformation, energy storage power stations, as an important part of grid flexibility regulation, are being built on a growing scale. However, the safety issues of energy storage power stations are becoming increasingly prominent, especially the occurrence of thermal runaway accidents, which have caused huge losses to personnel safety and property. Thermal runaway, as one of the most serious safety risks in energy storage systems, is often difficult to detect in its early stages, and once a chain reaction is formed, it is difficult to control.

[0003] At present, the warning methods commonly used in energy storage systems mainly include combustible gas alarms, smoke alarms and temperature alarms. These methods can respond quickly and trigger the fire protection system in the late stage of thermal runaway, that is, when a fire or explosion occurs. However, these sensors have significant limitations. They can only start the alarm when the thermal runaway event has developed to a certain extent, and cannot provide early warning in the embryonic stage of thermal runaway, which greatly limits the effectiveness of fire protection measures. For example, in the early stage of thermal runaway, the chemical reaction inside the battery may not release enough combustible gas or smoke to trigger the alarm, and the temperature rise may also be relatively slow, not enough to activate the temperature sensor.

[0004] In addition, the service life of combustible gas sensors and smoke sensors is usually short, generally between 1 and 3 years. After this period, the failure rate of the sensor increases significantly and the detection accuracy decreases, which undoubtedly brings additional burdens to the operation and maintenance of energy storage power stations. The sensitivity of smoke sensors is greatly affected by environmental factors, such as high dust environment and temperature changes, which may lead to false alarms, especially at high temperatures, when the water molecules in the air increase and the moisture content of smoke particles increases. The sensor may not be able to accurately detect tiny smoke particles, resulting in false alarms, which troubles the daily operation and maintenance of the power station.

[0005] For air-cooled and liquid-cooled energy storage systems, the existing early warning methods have revealed obvious shortcomings. In air-cooled systems, due to the air flow and heat dissipation effects, the changes in flammable gas, smoke and temperature may not be significant enough, making it difficult to accurately locate the battery cells that have thermal runaway, resulting in delayed early warnings. In liquid-cooled systems, although the battery temperature can be controlled more effectively, the signals at the beginning of thermal runaway are often masked by the heat capacity of the coolant. It is not until the thermal runaway event develops to a certain stage that the sensor can detect the abnormality, losing the best opportunity for early intervention.

[0006] In summary, the existing safety warning methods for energy storage power stations cannot provide early warnings at the beginning of thermal runaway.

[0007] In view of the problem in the related technology that the existing safety warning methods for energy storage power stations cannot provide warnings in the early stages of thermal runaway, no effective solution has yet been found. Summary of the invention

[0008] The embodiments of the present application provide a method and device for determining an early warning strategy, a storage medium, and an electronic device, so as to at least solve the problem in the prior art that the existing safety early warning method for energy storage power stations cannot provide an early warning in the early stage of thermal runaway.

[0009] According to one embodiment of the embodiments of the present application, a method for determining a warning strategy is provided, including: receiving pressure data collected by a pressure sensor at a preset frequency through a battery management system, wherein the pressure sensor is deployed in a battery module in an energy storage power station, and the energy storage power station is deployed with the battery management system; determining the pressure change rate of the battery module through two adjacent pressure data received; and determining the warning strategy for the battery module through the pressure change rate.

[0010] In an exemplary embodiment, the pressure change rate of the battery module is determined by receiving two adjacent pressure data, including: determining the time interval required for the pressure sensor to collect the two adjacent pressure data through the preset frequency; and determining the pressure change rate through the pressure difference between the two adjacent pressure data and the time interval.

[0011] In an exemplary embodiment, the early warning strategy for the battery module is determined by the pressure change rate, including: comparing the pressure change rate with a first threshold through a programmable logic controller, wherein the first threshold is a critical threshold for determining whether the battery module is in a normal charging and discharging process; when the pressure change rate is less than or equal to the first threshold, determining that the battery module is in a normal charging and discharging process, and determining that the early warning strategy is not to issue an early warning to the battery module.

[0012] In an exemplary embodiment, after comparing the pressure change rate with a first threshold value through a programmable logic controller, the method further includes: when the pressure change rate is greater than the first threshold value, determining that the battery module is in an abnormal charging and discharging process, and determining that the early warning strategy is to issue an early warning to the battery module.

[0013] In an exemplary embodiment, after comparing the pressure change rate with a first threshold value through a programmable logic controller, the method further includes: when the pressure change rate is greater than the first threshold value and the battery module is in the charging process, stopping charging the battery module; after stopping charging the battery module, obtaining n consecutive pressure change rates calculated after the pressure change rate, wherein n is a positive integer; when the n consecutive pressure change rates meet a preset condition, determining that the battery explosion-proof valve of the battery module is open, wherein the preset condition includes: the absolute value of the slope of each point on the target curve corresponding to the n pressure change rates is greater than a second threshold value, wherein each point on the target curve does not include the vertex of the target curve; controlling the fire protection system in the energy storage power station through the programmable logic controller to perform fire protection treatment on the battery module with the open battery explosion-proof valve.

[0014] In an exemplary embodiment, the method further includes: obtaining multiple pressure change rates corresponding to multiple battery modules respectively, wherein the multiple pressure change rates have the same timing characteristics, and the multiple battery modules include: the battery module; when the multiple pressure change rates do not exceed a first threshold, determining a target pressure change rate among the multiple pressure change rates, wherein the difference between the target pressure change rate and any pressure change rate is higher than a third threshold, and the any pressure change rate is any pressure change rate among the multiple pressure change rates except the target pressure change rate; increasing a preset frequency corresponding to a target battery module having the target pressure change rate, wherein the multiple battery modules include: the target battery module.

[0015] According to another embodiment of the embodiments of the present application, a device for determining a warning strategy is also provided, including: a receiving module, used to receive pressure data collected by a pressure sensor at a preset frequency through a battery management system, wherein the pressure sensor is deployed in a battery module in an energy storage power station, and the energy storage power station is deployed with the battery management system; a first determination module, used to determine the pressure change rate of the battery module through two adjacent pressure data received; and a second determination module, used to determine the warning strategy for the battery module through the pressure change rate.

[0016] According to another aspect of the embodiments of the present application, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the above method when running.

[0017] According to another aspect of the embodiments of the present application, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the method through the computer program.

[0018] According to another aspect of the embodiments of the present application, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments are implemented.

[0019] In an embodiment of the present application, the pressure data collected by the pressure sensor at a preset frequency is received by the battery management system, wherein the pressure sensor is deployed in the battery module in the energy storage power station, and the energy storage power station is deployed with the battery management system; the pressure change rate of the battery module is determined by the two adjacent pressure data received; and the early warning strategy for the battery module is determined by the pressure change rate. Through the above embodiment, the problem in the prior art that the existing safety early warning method of the energy storage power station cannot provide an early warning in the early stage of thermal runaway is solved, and the effect of determining the early warning strategy for the battery module of the energy storage power station by the pressure change rate in the early stage of thermal runaway is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 It is a hardware structure block diagram of a computer terminal of a method for determining an early warning strategy according to an embodiment of the present application;

[0022] Figure 2 is a flow chart of a method for determining an early warning strategy according to an embodiment of the present application;

[0023] Figure 3 This is the pressure curve of the lithium iron phosphate square shell battery during normal charging and discharging;

[0024] Figure 4 It is the pressure change curve of overcharge thermal runaway;

[0025] Figure 5 This is a schematic diagram of the process of thermal runaway warning through the pressure change rate;

[0026] Figure 6 It is a device for testing the pressure change rate of normal charge and discharge;

[0027] Figure 7 It is a device for testing the rate of pressure change of overcharge thermal runaway;

[0028] Figure 8It is a structural block diagram of a device for determining an early warning strategy according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices; "plurality" means two or more.

[0031] The method embodiments provided in the embodiments of the present application can be executed in a computer terminal or similar computing device or cloud platform or independent physical server or software platform, wherein the above software platform is run through one or more servers. Taking running on a computer terminal as an example, Figure 1 FIG. 1 is a hardware structure block diagram of a computer terminal for determining a warning strategy according to an embodiment of the present application. Figure 1 As shown, the computer terminal may include one or more ( Figure 1 Only one is shown in the figure) processor 102 and memory 104 for storing data. In an exemplary embodiment, the computer terminal may also include a transmission device 106 for communication functions and an input and output device 108, wherein the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA. A person skilled in the art can understand that Figure 1 The structure shown is only for illustration and does not limit the structure of the above-mentioned computer terminal. Figure 1 More or fewer components as shown, or with Figure 1 Equivalent functions or comparisons shown Figure 1 A different configuration with more features is shown.

[0032] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as computer programs corresponding to the methods in the embodiments of the present application. The processor 102 executes various functional applications and data processing by running the computer programs stored in the memory 104, that is, the above-mentioned methods are implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the computer terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0033] The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of a computer terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0034] In this embodiment, a method for determining an early warning strategy is provided, which is applied to the above-mentioned computer terminal, or can also be applied to an energy storage power station. Figure 2 : is a flowchart of a method for determining an early warning strategy according to an embodiment of the present application, the process includes the following steps:

[0035] Step S202, receiving pressure data collected by a pressure sensor at a preset frequency through a battery management system, wherein the pressure sensor is deployed in a battery module in an energy storage power station, and the energy storage power station is deployed with the battery management system;

[0036] Optionally, the preset acquisition frequency may be to take a point (ie, pressure data) every 1 second (or 10 seconds).

[0037] Step S204, determining the pressure change rate of the battery module by receiving two adjacent pressure data;

[0038] Step S206: determining a warning strategy for the battery module according to the pressure change rate.

[0039] Through the above steps, the pressure data collected by the pressure sensor at a preset frequency is received by the battery management system, wherein the pressure sensor is deployed in the battery module in the energy storage power station, and the energy storage power station is deployed with the battery management system; the pressure change rate of the battery module is determined by two adjacent pressure data received; and the early warning strategy for the battery module is determined by the pressure change rate. Through the above embodiments, the problem in the prior art that the existing safety early warning method of the energy storage power station cannot provide an early warning in the early stage of thermal runaway is solved, and the effect of determining the early warning strategy for the battery module of the energy storage power station by the pressure change rate in the early stage of thermal runaway is achieved.

[0040] In an exemplary embodiment, the pressure change rate of the battery module is determined by receiving two adjacent pressure data, including: determining the time interval required for the pressure sensor to collect the two adjacent pressure data through the preset frequency; and determining the pressure change rate through the pressure difference between the two adjacent pressure data and the time interval.

[0041] It can be understood that the pressure change rate is equal to the ratio of the pressure difference to the time interval.

[0042] In an exemplary embodiment, the early warning strategy for the battery module is determined by the pressure change rate, including: comparing the pressure change rate with a first threshold through a programmable logic controller, wherein the first threshold is a critical threshold for determining whether the battery module is in a normal charging and discharging process; when the pressure change rate is less than or equal to the first threshold, determining that the battery module is in a normal charging and discharging process, and determining that the early warning strategy is not to issue an early warning to the battery module.

[0043] Furthermore, after comparing the pressure change rate with a first threshold value through a programmable logic controller, the method also includes: when the pressure change rate is greater than the first threshold value, determining that the battery module is in an abnormal charging and discharging process, and determining that the early warning strategy is to issue an early warning to the battery module.

[0044] That is to say, after calculating the pressure change rate, the pressure change rate is compared with the preset first threshold value. If the pressure change rate is less than or equal to the first threshold value, the battery module of the energy storage power station is in a normal charging and discharging state, and it is only necessary to continue to collect the pressure data of the battery module to monitor the battery module, and there is no need to warn the battery module; if the pressure change rate is greater than the first threshold value, the battery module of the energy storage power station is in an abnormal charging and discharging state, and a warning is required. It should be noted that the pressure of the battery module during normal charging and discharging is not greater than the first threshold value, which is generally 0.6kg / s.

[0045] In an exemplary embodiment, after comparing the pressure change rate with a first threshold value through a programmable logic controller, the method further includes: when the pressure change rate is greater than the first threshold value and the battery module is in the charging process, stopping charging the battery module; after stopping charging the battery module, obtaining n consecutive pressure change rates calculated after the pressure change rate, wherein n is a positive integer; when the n consecutive pressure change rates meet a preset condition, determining that the battery explosion-proof valve of the battery module is open, wherein the preset condition includes: the absolute value of the slope of each point on the target curve corresponding to the n pressure change rates is greater than a second threshold value, wherein each point on the target curve does not include the vertex of the target curve; controlling the fire protection system in the energy storage power station through the programmable logic controller to perform fire protection treatment on the battery module with the open battery explosion-proof valve.

[0046] It is understandable that if the pressure change rate still increases after charging is stopped, and it increases sharply and then drops sharply, it can be judged that the battery explosion-proof valve is open. At this time, the fire-fighting system should be turned on immediately, and the battery module should be treated for fire to prevent heat diffusion.

[0047] In an optional embodiment, the method further includes: obtaining multiple pressure change rates corresponding to multiple battery modules respectively, wherein the multiple pressure change rates have the same timing characteristics, and the multiple battery modules include: the battery module; when the multiple pressure change rates do not exceed the first threshold, determining a target pressure change rate among the multiple pressure change rates, wherein the difference between the target pressure change rate and any pressure change rate is higher than a third threshold, and the any pressure change rate is any pressure change rate among the multiple pressure change rates except the target pressure change rate; increasing the preset frequency corresponding to the target battery module having the target pressure change rate, wherein the multiple battery modules include: the target battery module.

[0048] That is to say, when the pressure change rate of a battery module exceeds that of other battery modules, it may indicate that faster attenuation occurs in this battery module, and this battery module can be monitored intensively. One of the monitoring methods is to increase the preset frequency of collecting pressure data of this battery module.

[0049] In order to better understand the process of the method for determining the above-mentioned early warning strategy, the method for determining the above-mentioned early warning strategy is described below in combination with an optional embodiment, but it is not used to limit the technical solution of the embodiment of the present application.

[0050] Optionally, the optional embodiment of the present application monitors the pressure through the BMS, and determines whether the battery is about to experience thermal runaway in combination with the pressure change rate. Specifically, when the battery pack (i.e., battery module, or battery module) is integrated, the pressure sensor is placed in the module in advance (the position can be at both ends or in the middle of the battery, the position and quantity are uncertain), and the pressure sensor data can be collected through the BMS, taking a point every 1s (or 10s), and calculating the pressure change rate through the two pressure data:

[0051]

[0052] Wherein, ΔP represents the pressure change rate. P1 is the pressure data collected for the first time between two adjacent pressure data; P2 is the pressure data collected for the second time between two adjacent pressure data; (P 2- P1) is equivalent to the pressure difference in the above embodiment. t1 is the acquisition time corresponding to the pressure data acquired for the first time; t2 is the acquisition time corresponding to the pressure data acquired for the second time; (t2-t1) is equivalent to the time interval in the above embodiment.

[0053] It should be noted that the type of pressure sensor is not limited. It can be a diaphragm sensor, a strain gauge sensor, a thin film sensor, etc., as long as it can detect the battery pressure. The pressure sensor can be arranged at the end face of the battery module or in the middle of the battery module, and the position and number are not limited.

[0054] The pressure sensor in the optional embodiment of the present application also has the following advantages: the pressure sensor has a long service life, eliminating the need for later operation and maintenance; the pressure sensor is not affected by temperature (temperature compensation can be performed) and monitors the pressure changes during the charging and discharging process; the pressure sensor has high accuracy and will not cause false alarms, simplifying operation and maintenance; thermal runaway is determined by the pressure change rate instead of the pressure value as a judgment condition, eliminating the need for later calibration;

[0055] Figure 3 This is the pressure curve of the lithium iron phosphate square shell battery during normal charging and discharging. Figure 3 As shown, the pressure change rate of the battery cell during normal charging and discharging is small; Figure 4 It is the overcharge thermal runaway pressure change curve, such as Figure 4 As shown, the pressure change rate increases sharply when thermal runaway is about to occur.

[0056] Early warning is provided by comparing the pressure change rate during normal charging with that during overcharging. During normal charging and discharging, the pressure change rate is no more than 0.6kg / s, and the pressure change rate during the entire process from 4 minutes before valve opening to valve opening is greater than 0.6kg / s. The pressure change rate can be used to provide early warning 4 minutes before valve opening, and early warning of thermal runaway 10 minutes in advance, greatly improving the safety performance of the energy storage system.

[0057] Optionally, if a pressure sensor warning occurs, the voltage and other parameters of the current battery module of the BMS can be compared through the PLC to determine whether thermal runaway and other problems have occurred, thereby preventing false alarms.

[0058] Among them, PLC (Programmable Logic Controller) is used to determine whether thermal runaway occurs and to issue a thermal runaway warning. Figure 5 This is a flow chart of thermal runaway warning by using the pressure change rate, such as Figure 5 As shown, two modes are set in the PLC: 1) determine whether the pressure change rate exceeds the set threshold. If so, charging should be stopped immediately; 2) if the pressure change rate continues to increase after the battery stops charging, and it increases sharply, and then drops sharply, it can be determined that the battery explosion-proof valve is open. At this time, the fire protection system should be turned on immediately, and the battery pack should be treated for fire protection to prevent heat diffusion.

[0059] The setting of the first threshold can be based on Figure 6 and Figure 7 The device shown. Figure 6 It is a device for testing the pressure change rate of normal charge and discharge. Figure 7 It is a device for testing the pressure change rate of overcharge thermal runaway. The pressure change rate can be monitored through EMS. When the pressure change rate of a battery module exceeds that of other battery modules, it can indicate that there are batteries with faster attenuation and larger internal resistance in this battery module. If the pressure sensor used is more precise and has a longer life, this data can also be used as a monitoring point for intelligent operation and maintenance to determine the battery life.

[0060] The battery consistency of the energy storage power station can be judged by detecting the pressure change rate of the entire station module. Special attention will be paid to the modules with fast pressure change rate but not reaching the threshold, which can serve as an early warning.

[0061] It should be noted that the battery modules in the optional embodiments of the present application include but are not limited to different types of batteries such as lithium-ion batteries and sodium-ion batteries, and these batteries can set the pressure change rate threshold according to their own expansion force characteristics. Energy storage power stations include but are not limited to air-cooled, liquid-cooled, and submerged energy storage, and can all be used to issue warnings by detecting the pressure change rate of the module.

[0062] In summary, the method provided in the optional embodiment of the present application can detect thermal runaway in the early stage of the battery and promptly warn of thermal runaway, thereby reducing the occurrence of thermal runaway and preventing the spread of thermal runaway. Compared with early warning sensors such as combustible gas, temperature sensors, and smoke sensors that cannot directly reflect the battery status, and the temperature and smoke transmission still require a certain amount of time, the pressure sensor in the optional embodiment of the present application can be arranged in close proximity to the battery, and the battery status can be judged relatively directly and quickly, so as to respond. Pressure sensors can be added without changing the original module structure, and data can be collected in conjunction with the BMS, which is highly feasible; by monitoring the changes in the pressure change rate, the battery consistency and life can be judged, providing support for operation and maintenance.

[0063] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods of each embodiment of the present application.

[0064] The present application also provides a structural block diagram of a device for determining an early warning strategy. Figure 8 is a structural block diagram of a device for determining an early warning strategy according to an embodiment of the present application; Figure 8 As shown, including:

[0065] A receiving module 82, configured to receive pressure data collected by a pressure sensor at a preset frequency through a battery management system, wherein the pressure sensor is deployed in a battery module in an energy storage power station, and the battery management system is deployed in the energy storage power station;

[0066] A first determination module 84, configured to determine the pressure change rate of the battery module according to two adjacent pressure data received;

[0067] The second determination module 86 is used to determine a warning strategy for the battery module according to the pressure change rate.

[0068] Through the above device, the pressure data collected by the pressure sensor at a preset frequency is received by the battery management system, wherein the pressure sensor is deployed in the battery module in the energy storage power station, and the energy storage power station is deployed with the battery management system; the pressure change rate of the battery module is determined by the two adjacent pressure data received; and the early warning strategy for the battery module is determined by the pressure change rate. Through the above embodiment, the problem in the prior art that the existing safety early warning method of the energy storage power station cannot provide an early warning in the early stage of thermal runaway is solved, and the effect of determining the early warning strategy for the battery module of the energy storage power station by the pressure change rate in the early stage of thermal runaway is achieved.

[0069] In an exemplary embodiment, the first determination module 84 is further used to: determine the time interval required for the pressure sensor to collect the two adjacent pressure data through the preset frequency; and determine the pressure change rate through the pressure difference between the two adjacent pressure data and the time interval.

[0070] In an exemplary embodiment, the second determination module 86 is further used to: compare the pressure change rate with a first threshold value through a programmable logic controller, wherein the first threshold value is a critical threshold value for determining whether the battery module is in a normal charging and discharging process; when the pressure change rate is less than or equal to the first threshold value, determine that the battery module is in a normal charging and discharging process, and determine that the warning strategy is not to issue a warning to the battery module.

[0071] In an exemplary embodiment, the second determination module 86 is further used to: when the pressure change rate is greater than the first threshold, determine that the battery module is in an abnormal charging and discharging process, and determine that the warning strategy is to issue a warning to the battery module.

[0072] In an exemplary embodiment, the device also includes a fire protection processing module, which is used to compare the pressure change rate with a first threshold through a programmable logic controller: when the pressure change rate is greater than the first threshold and the battery module is in the charging process, stop charging the battery module; after stopping charging the battery module, obtain n consecutive pressure change rates calculated after the pressure change rate, wherein n is a positive integer; when the n consecutive pressure change rates meet preset conditions, determine that the battery explosion-proof valve of the battery module is open, wherein the preset conditions include: the absolute value of the slope of each point on the target curve corresponding to the n pressure change rates is greater than a second threshold, wherein each point on the target curve does not include the vertex of the target curve; control the fire protection system in the energy storage power station through the programmable logic controller to perform fire protection treatment on the battery module with the open battery explosion-proof valve.

[0073] In an exemplary embodiment, the device also includes a frequency adjustment module, which is used to: obtain multiple pressure change rates corresponding to multiple battery modules, wherein the multiple pressure change rates have the same timing characteristics, and the multiple battery modules include: the battery module; when the multiple pressure change rates do not exceed the first threshold, determine the target pressure change rate among the multiple pressure change rates, wherein the difference between the target pressure change rate and any pressure change rate is higher than a third threshold, and the any pressure change rate is any pressure change rate among the multiple pressure change rates except the target pressure change rate; increase the preset frequency corresponding to the target battery module having the target pressure change rate, wherein the multiple battery modules include: the target battery module.

[0074] An embodiment of the present application further provides a storage medium, which includes a stored program, wherein the program executes any of the above methods when it is run.

[0075] Optionally, in this embodiment, the storage medium may be configured to store program codes for executing the following steps:

[0076] S1, receiving pressure data collected by a pressure sensor at a preset frequency through a battery management system, wherein the pressure sensor is deployed in a battery module in an energy storage power station, and the energy storage power station is deployed with the battery management system;

[0077] S2, determining the pressure change rate of the battery module by receiving two adjacent pressure data;

[0078] S3, determining a warning strategy for the battery module according to the pressure change rate.

[0079] An embodiment of the present application further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0080] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0081] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0082] S1, receiving pressure data collected by a pressure sensor at a preset frequency through a battery management system, wherein the pressure sensor is deployed in a battery module in an energy storage power station, and the energy storage power station is deployed with the battery management system;

[0083] S2, determining the pressure change rate of the battery module by receiving two adjacent pressure data;

[0084] S3, determining a warning strategy for the battery module according to the pressure change rate.

[0085] Optionally, in this embodiment, the above-mentioned storage medium may include but is not limited to: a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and other media that can store program codes.

[0086] An embodiment of the present application further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps in any one of the above method embodiments are implemented.

[0087] An embodiment of the present application further provides another computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments are implemented.

[0088] An embodiment of the present application also provides a computer program, which includes computer instructions stored in a computer-readable storage medium; a processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the steps in any one of the above method embodiments.

[0089] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation modes, and this embodiment will not be described in detail here.

[0090] Obviously, those skilled in the art should understand that the above modules or steps of the present application can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, and optionally, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order from that herein, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present application is not limited to any specific combination of hardware and software.

[0091] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for determining an early warning strategy, characterized in that: include: Receiving pressure data collected by a pressure sensor at a preset frequency through a battery management system, wherein the pressure sensor is deployed in a battery module in an energy storage power station, and the battery management system is deployed in the energy storage power station; Determine the pressure change rate of the battery module by receiving two adjacent pressure data; The early warning strategy for the battery module is determined according to the pressure change rate.

2. The method for determining the early warning strategy according to claim 1, characterized in that: Determining the pressure change rate of the battery module by receiving two adjacent pressure data includes: Determine the time interval required for the pressure sensor to collect the two adjacent pressure data by using the preset frequency; The pressure change rate is determined by the pressure difference between the two adjacent pressure data and the time interval.

3. The method for determining the early warning strategy according to claim 1, characterized in that: Determining an early warning strategy for the battery module according to the pressure change rate includes: Comparing the pressure change rate with a first threshold value through a programmable logic controller, wherein the first threshold value is a critical threshold value for determining whether the battery module is in a normal charging and discharging process; When the pressure change rate is less than or equal to the first threshold, it is determined that the battery module is in a normal charging and discharging process, and the warning strategy is determined to not issue a warning to the battery module.

4. The method for determining the early warning strategy according to claim 3, characterized in that: After comparing the pressure change rate with a first threshold value through a programmable logic controller, the method further includes: When the pressure change rate is greater than the first threshold, it is determined that the battery module is in an abnormal charging and discharging process, and the early warning strategy is determined to issue an early warning to the battery module.

5. The method for determining the early warning strategy according to claim 3, characterized in that: After comparing the pressure change rate with a first threshold value through a programmable logic controller, the method further includes: When the pressure change rate is greater than the first threshold and the battery module is in the charging process, stop charging the battery module; After stopping charging the battery module, obtaining n consecutive pressure change rates calculated after the pressure change rate, where n is a positive integer; When the n consecutive pressure change rates satisfy a preset condition, determining that the battery explosion-proof valve of the battery module is opened, wherein the preset condition includes: the absolute value of the slope of each point on the target curve corresponding to the n pressure change rates is greater than a second threshold, wherein each point on the target curve does not include the vertex of the target curve; The programmable logic controller controls the fire protection system in the energy storage power station to perform fire protection on the battery module with the battery explosion-proof valve opened.

6. The method for determining the early warning strategy according to claim 1, characterized in that: The method further comprises: Acquire multiple pressure change rates corresponding to multiple battery modules respectively, wherein the multiple pressure change rates have the same timing characteristics, and the multiple battery modules include: the battery module; when none of the multiple pressure change rates exceeds the first threshold, determine a target pressure change rate among the multiple pressure change rates, wherein the difference between the target pressure change rate and any pressure change rate is higher than a third threshold, and the any pressure change rate is any pressure change rate among the multiple pressure change rates except the target pressure change rate; The preset frequency corresponding to the target battery module having the target pressure change rate is increased, wherein the plurality of battery modules include: the target battery module.

7. A device for determining an early warning strategy, characterized in that: include: A receiving module, used to receive pressure data collected by a pressure sensor at a preset frequency through a battery management system, wherein the pressure sensor is deployed in a battery module in an energy storage power station, and the battery management system is deployed in the energy storage power station; A first determination module, configured to determine a pressure change rate of the battery module by receiving two adjacent pressure data; The second determination module is used to determine the early warning strategy for the battery module according to the pressure change rate.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the method described in any one of claims 1 to 6 when executed.

9. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to execute the method according to any one of claims 1 to 6 through the computer program.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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