A double-protection energy storage cabinet and its fault detection system

Abstract

The present invention relates to the technical field of electric energy storage, and discloses a double-defense energy storage cabinet and a fault detection system thereof, including an energy storage monitoring module for status monitoring of the energy storage system of the double-defense energy storage cabinet; a double-defense monitoring module for health assessment of the double-defense system of the double-defense energy storage cabinet; a temperature prediction module for temperature prediction of the energy storage system; a fault response module for fault response of the double-defense energy storage cabinet, issuing an alarm signal and a fault response instruction; an energy storage control module for executing a fault response instruction and controlling the operation of the energy storage system; a double-defense control module for executing a fault response instruction and controlling the operation of the double-defense system; and a monitoring and display module for visually displaying the status information of the double-defense energy storage cabinet. The present invention provides a solution for improving the safety, reliability and operation and maintenance efficiency of the energy storage system, and has important practical significance for promoting the application and development of energy storage technology.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy storage, and in particular to a double-protection energy storage cabinet and a fault detection system thereof. Background Art

[0002] With the transformation of the global energy structure and the rapid development of renewable energy, energy storage technology has become a key link in achieving efficient energy utilization and stable supply. As an important part of the energy storage system, the safety and stability of the energy storage cabinet are directly related to the reliable operation of the entire energy network. Energy storage cabinet failures are mainly concentrated in battery thermal runaway, electrical failures, etc. Thermal runaway is one of the most serious safety hazards in energy storage systems. It may cause battery fires or even explosions, causing significant losses to personnel safety and property. Electrical failures may be caused by battery short circuits, overcharging or over-discharging, which not only affects battery life, but also increases the risk of fire.

[0003] Existing fault detection technologies mostly focus on monitoring and early warning in a single dimension, such as relying only on temperature sensors to monitor the thermal state of batteries, or preventing electrical faults through current and voltage monitoring. These methods can warn of some faults to a certain extent, but they are often powerless in the face of complex energy storage system failure modes, especially when it is necessary to consider fault prediction in both time and space dimensions. For example, the heat transfer effect between batteries and the impact of spatial layout on overall thermal management, as well as the trend analysis of battery state parameters over time, have not been fully considered. Many existing systems tend to monitor energy storage systems and safety protection systems (such as temperature control and fire protection facilities) independently, lacking an efficient cross-system linkage mechanism. This means that when an abnormality occurs in the energy storage system, the activation of protective measures may lag behind, and potential risks cannot be suppressed in time, increasing the possibility and severity of accidents. Existing fault detection systems often rely on simple threshold comparisons or basic data analysis, lack the application of deep learning and big data analysis, and it is difficult to accurately predict the performance degradation trend and potential failures of energy storage batteries. Especially for complex spatial layouts and dynamically changing environmental conditions, the limitations of this analysis method are more obvious.

[0004] For example, the patent application with publication number CN114665172A discloses an energy storage battery cabinet and its security self-starting method. In the method, when there is no AC power input to the energy storage battery cabinet, the BMS is awakened periodically based on its own first uninterruptible power supply, and the battery status is detected after awakening; then, if the BMS determines that the battery status meets the preset thermal runaway condition, the second uninterruptible power supply in the energy storage battery cabinet is awakened to power the security unit in the energy storage battery cabinet, so that the security unit can perform security work; that is, the application can not only realize the periodic detection of battery safety failures without external power supply, but also start the second uninterruptible power supply in time to ensure the function of the security unit, thereby ensuring the fire safety of the overall equipment and reducing security risks.

[0005] For example, the patent application with publication number CN116995355A discloses a fast-fault-isolating energy storage battery cabinet, including: a storage component including an energy storage cabinet, a mobile rack, a sliding door, a signal collector, and an energy storage processor, the energy storage cabinet is provided with an energy storage cavity on the side, the mobile rack is placed in the energy storage cavity, the sliding door is slidably matched with the energy storage cabinet, the signal collector and the energy storage processor are mounted on the energy storage cabinet, and the energy storage battery is mounted on the mobile rack; a limit assembly, the limit assembly includes a revolving door limiter and a mobile limiter, the revolving door limiter and the mobile limiter are respectively connected to the energy storage cabinet. When a battery PACK fails, the battery PACK is quickly ejected into the isolation channel for fire extinguishing to avoid causing greater damage.

[0006] The above patents all have the problems raised by this background technology: they focus on monitoring and early warning in a single dimension and lack an efficient cross-system linkage mechanism.

[0007] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgement or any form of suggestion that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0008] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a double-protection energy storage cabinet and a fault detection system thereof, so as to provide a solution for improving the safety, reliability and operation and maintenance efficiency of the energy storage system.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0010] On the one hand, the present invention provides a fault detection system for a double-defense energy storage cabinet, comprising an energy storage monitoring module, a temperature prediction module, an energy storage control module, a double-defense monitoring module, a double-defense control module, a fault response module, and a monitoring display module; wherein:

[0011] The energy storage monitoring module is used to monitor the status of the energy storage system of the double-protection energy storage cabinet;

[0012] The dual-defense monitoring module is used to perform health assessment on the dual-defense system of the dual-defense energy storage cabinet;

[0013] The temperature prediction module performs temperature prediction of the energy storage system based on the result of the state monitoring;

[0014] The fault response module is used to respond to the fault of the double-protection energy storage cabinet and send out an alarm signal and a fault response instruction;

[0015] The energy storage control module is used to execute the fault response instruction and control the operation of the energy storage system;

[0016] The dual-defense control module is used to execute the fault response instruction and control the operation of the dual-defense system;

[0017] The monitoring and display module is used to visually display the status information of the double-protection energy storage cabinet and send the alarm signal to the management personnel.

[0018] As a preferred solution of the fault detection system of the double-protection energy storage cabinet of the present invention, the temperature prediction module includes a space unit for establishing a distance matrix of each battery in the double-protection energy storage cabinet, and the method is as follows:

[0019] S101: Divide the space where the battery module of the double-protection energy storage cabinet is located into three-dimensional grids, where each three-dimensional grid corresponds to a battery slot;

[0020] S102: Encode the three-dimensional grid;

[0021] S103: Establishing a three-dimensional coordinate system and calculating the distance between any two three-dimensional grids; the distance between the grids can be represented by the distance between the center points of the two grids;

[0022] S104: Based on the distance between any two three-dimensional grids, a distance matrix covering all batteries in the double-protection energy storage cabinet is constructed.

[0023] As a preferred solution of the fault detection system of the double-protection energy storage cabinet of the present invention, the temperature prediction module further includes a time unit for establishing a time series of each state parameter of each battery, and the method is as follows:

[0024] S201: Standardizing the status parameters of each battery;

[0025] S202: Establishing a time series of state parameters for each battery, including a temperature series, a voltage series, a current series, an internal resistance series, and an insulation resistance series;

[0026] S203: extracting the timestamp of the temperature sequence of each battery;

[0027] S204: by sampling and linear interpolation, the elements in the voltage sequence, current sequence, internal resistance sequence, and insulation resistance sequence of each battery are made to correspond to the timestamps of the corresponding temperature sequence one by one.

[0028] As a preferred solution of the fault detection system of the double-protection energy storage cabinet of the present invention, wherein: the temperature prediction module also includes a prediction model unit; the prediction model unit is configured with a temperature prediction model for predicting the temperature of each battery, and transmitting the temperature prediction value of each battery to the fault response module;

[0029] The temperature prediction model has a distance matrix and a time series of each state parameter of each battery as input, and outputs a predicted value of the temperature of each battery; it includes a first input layer, a first feature extraction layer, a second input layer, a second feature extraction layer, a feature fusion layer, and an output layer;

[0030] The first input layer is used to input the time series of each state parameter of each battery;

[0031] The first feature extraction layer is used to extract the time features of the state parameters;

[0032] The second input layer is used to input a distance matrix;

[0033] The second feature extraction layer is used to extract the spatial features of the state parameters;

[0034] The feature fusion layer is used to fuse the temporal features and spatial features of the state parameters to generate the temporal and spatial features of the state parameters;

[0035] The output layer calculates and outputs the predicted value of the temperature of each battery based on the spatiotemporal characteristics of the state parameters.

[0036] As a preferred solution of the fault detection system of the double-defense energy storage cabinet of the present invention, wherein: the energy storage monitoring module includes a sensor unit and a data cleaning unit; the sensor unit is configured with a temperature sensor, a voltage sensor, a current sensor, an internal resistance sensor, and an insulation resistance sensor, and is used to collect the state parameters of each battery in the double-defense energy storage cabinet in real time, including temperature, voltage, current, internal resistance, and insulation resistance; the data cleaning unit is used to clean the state parameters of each battery and transmit them to the fault response module and the temperature prediction module respectively.

[0037] As a preferred solution of the fault detection system of the double-defense energy storage cabinet of the present invention, wherein: the double-defense monitoring module is used to perform health assessment on the double-defense system of the double-defense energy storage cabinet; it includes a data acquisition unit and a health assessment unit;

[0038] The data collection unit is used to collect health indicators of the dual defense system and normalize each health indicator;

[0039] The health indicators of the dual protection system include the outlet flow of the heat exchanger, the inlet and outlet temperature difference of the heat exchanger, the water tank liquid level, the booster pump efficiency, the refrigerant pressure, the compressor efficiency, the exhaust fan speed, the exhaust fan noise, the ventilation resistance, and the injection system pressure;

[0040] The health assessment unit calculates a comprehensive health index of the dual defense system based on the health index and transmits the comprehensive health index to the fault response module;

[0041] The calculation formula of the comprehensive health index is as follows:

[0042] ;

[0043] Among them, C represents the comprehensive health index of the dual defense system; represents the normalized health index of the dual defense system; the value range of i is 1, 2, ..., N, where N represents the number of types of health indicators; Represents the weight coefficient of the i-th health indicator.

[0044] As a preferred solution of the fault detection system of the double-protection energy storage cabinet of the present invention, wherein: the fault response module includes a fault alarm unit and a fault instruction unit;

[0045] The fault alarm unit is used to receive the status parameters of each battery, the temperature prediction value, and the comprehensive health index of the dual-defense system, and to make a fault judgment on the dual-defense energy storage cabinet and send out an alarm signal, as follows:

[0046] If at least one state parameter of at least one battery exceeds the threshold range of the state parameter, or the predicted temperature value of at least one battery is higher than the temperature threshold, the energy storage system has a fault; an alarm signal is issued to indicate the type and scope of the fault;

[0047] If the comprehensive health index is lower than the preset health threshold, the dual defense system has a fault; an alarm signal is issued to prompt the dual defense system to be repaired;

[0048] The fault instruction unit is used to issue fault response instructions, including energy storage fault instructions and dual protection fault instructions.

[0049] As a preferred solution of the fault detection system of the double-protection energy storage cabinet of the present invention, wherein: the energy storage control module includes a first decoding unit and a first execution unit; the first decoding unit is used to receive and decode the fault response instruction and generate the energy storage control instruction; the first execution unit is used to execute the energy storage control instruction to control the operation of the energy storage system;

[0050] The dual-protection control module includes a second decoding unit and a second execution unit; the second decoding unit is used to receive and decode the fault response instruction and generate a dual-protection control instruction; the second execution unit is used to execute the dual-protection control instruction to control the operation of the dual-protection system;

[0051] If the first decoding unit receives the energy storage fault instruction, it generates a first energy storage control instruction; the first execution unit executes the first energy storage control instruction, lowers the charge and discharge power level of the energy storage system, and cuts off the connection between the faulty battery and the internal circuit and external circuit of the double-protection energy storage cabinet;

[0052] If the second decoding unit receives the energy storage fault instruction, it generates the first dual protection control instruction; the second execution unit executes the first dual protection control instruction, and if the dual protection system is in standby state, the working state of the dual protection system is switched to the high temperature protection mode; if the dual protection system is in the high temperature protection mode, the working state of the dual protection system is switched to the fire and explosion protection mode.

[0053] As a preferred solution of the fault detection system of the double-protection energy storage cabinet of the present invention, if the first decoding unit receives the double-protection fault instruction, it generates a second energy storage control instruction; the first execution unit executes the second energy storage control instruction to reduce the charging and discharging power level of the energy storage system;

[0054] If the second decoding unit receives a dual protection fault instruction, it generates a second dual protection control instruction; the second execution unit executes the second dual protection control instruction, stops the dual protection system, and issues a maintenance notice for the dual protection system.

[0055] In a second aspect, the present invention provides a double-protection energy storage cabinet, including an energy storage system, a double-protection system, and a fault detection system;

[0056] The energy storage system is used to store electric energy and is equipped with drawers, all of which are arranged in order from top to bottom; each drawer is provided with a battery slot, each of which accommodates an energy storage battery;

[0057] The dual protection system is used to cool down the energy storage system, and is provided with a high temperature protection mode and a fire and explosion protection mode; it includes a water tank, a high temperature protection component and a fire and explosion protection component;

[0058] The fault detection system is used for fault detection of the double-defense energy storage cabinet; it includes status monitoring and temperature prediction of the energy storage system, health assessment of the double-defense system, and fault response of the double-defense energy storage cabinet.

[0059] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0060] By introducing an advanced temperature prediction model that integrates time and space features, combined with the time series analysis of battery status parameters and the impact of spatial layout, we can achieve high-precision prediction of the temperature of each battery, identify potential thermal runaway risks in advance, and greatly improve the accuracy of fault warning.

[0061] A close linkage mechanism between the energy storage system and the dual protection system has been established to ensure that when an abnormality is detected on either side, the corresponding fault response measures can be triggered immediately, effectively preventing the spread of the fault, reducing system downtime, and ensuring the continuity and stability of energy supply.

[0062] Through comprehensive health assessment and intelligent fault judgment logic, the system can proactively prompt maintenance needs for the energy storage system or dual-defense system, automatically adjust the operating modes of the energy storage system and the dual-defense system, promote the transition from passive response to active preventive maintenance, extend equipment service life, and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0064] Figure 1 A schematic diagram of the structure of a fault detection system for a double-protection energy storage cabinet provided by the present invention;

[0065] Figure 2 A flow chart of a method for establishing a distance matrix for each battery in a double-protection energy storage cabinet provided by the present invention;

[0066] Figure 3 A flow chart of a method for establishing a time series of each state parameter of each battery provided by the present invention;

[0067] Figure 4 This is a schematic diagram of the structure of the temperature prediction model provided by the present invention. DETAILED DESCRIPTION

[0068] The technical solution of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations on the technical solution of the present invention. The embodiments of the present invention and the technical features in the embodiments may be combined with each other unless there is a conflict.

[0069] Example 1

[0070] This embodiment introduces a fault detection system for a double-protection energy storage cabinet. Figure 1The system includes an energy storage monitoring module, a temperature prediction module, an energy storage control module, a dual-defense monitoring module, a dual-defense control module, a fault response module, and a monitoring display module.

[0071] The energy storage monitoring module is used to monitor the state of the energy storage system of the double-defense energy storage cabinet; it includes a sensor unit and a data cleaning unit; the sensor unit is configured with a temperature sensor, a voltage sensor, a current sensor, an internal resistance sensor, and an insulation resistance sensor to form a dense monitoring network for real-time acquisition of the state parameters of each battery in the double-defense energy storage cabinet, including temperature, voltage, current, internal resistance, and insulation resistance; the data cleaning unit is used to clean the state parameters of each battery and transmit them to the fault response module and the temperature prediction module respectively.

[0072] The temperature prediction module predicts the temperature of the energy storage system based on the results of the state monitoring; it includes a space unit, a time unit, and a prediction model unit;

[0073] The space unit is used to establish a distance matrix for each battery in the double-protection energy storage cabinet, as shown in the following method: Figure 2 As shown, the details are as follows:

[0074] S101: Divide the space where the battery module of the double-protection energy storage cabinet is located into three-dimensional grids, where each three-dimensional grid corresponds to a battery slot;

[0075] S102: Encoding the three-dimensional grids; assigning a unique code to each grid helps to quickly locate the grid corresponding to each battery slot in subsequent calculations;

[0076] S103: Establishing a three-dimensional coordinate system and calculating the distance between any two three-dimensional grids; the distance between the grids can be represented by the distance between the center points of the two grids;

[0077] S104: Based on the distance between any two three-dimensional grids, a distance matrix covering all batteries in the double-protection energy storage cabinet is constructed.

[0078] Any element in the distance matrix represents the distance between two batteries in the double-protection energy storage cabinet, that is, the distance between the three-dimensional grids corresponding to the battery slots where the batteries are located. The distance matrix will be used as part of the input of the temperature prediction model to reflect the spatial proximity between batteries and potential heat transfer, electrical influence and other factors. In this way, considering the potential impact of spatial layout on battery performance (such as heat dissipation efficiency and fault propagation risk) can make the model closer to the actual situation and improve the accuracy of temperature prediction.

[0079] The time unit is used to establish the time series of each state parameter of each battery; the method is as follows Figure 3 As shown, the details are as follows:

[0080] S201: Standardizing the status parameters of each battery;

[0081] S202: Establishing a time series of state parameters for each battery, including a temperature series, a voltage series, a current series, an internal resistance series, and an insulation resistance series;

[0082] S203: extracting the timestamp of the temperature sequence of each battery;

[0083] S204: by sampling and linear interpolation, the elements in the voltage sequence, current sequence, internal resistance sequence, and insulation resistance sequence of each battery are made to correspond to the timestamps of the corresponding temperature sequence one by one.

[0084] For any battery, the temperature sequence is used as the reference sequence, the timestamp of the temperature sequence is extracted as the reference timestamp, and the elements in other sequences are sampled and interpolated, the elements that coincide with the reference timestamp are retained, and the vacant elements on the reference timestamp are filled by linear interpolation, and then the elements that do not coincide with the reference timestamp are deleted, so that all sequences are aligned in time with the temperature sequence, so that different sequences can be compared in the same time frame.

[0085] The prediction model unit is configured with a temperature prediction model for predicting the temperature of each battery and transmitting the temperature prediction value of each battery to the fault response module;

[0086] The input of the temperature prediction model is the distance matrix and the time series of each state parameter of each battery, and the output is the predicted value of the temperature of each battery; Figure 4 As shown, it includes a first input layer, a first feature extraction layer, a second input layer, a second feature extraction layer, a feature fusion layer, and an output layer;

[0087] The first input layer is used to input the time series of each state parameter of each battery;

[0088] The first feature extraction layer is used to extract the time features of the state parameters; the recurrent layer (such as LSTM or GRU) is used to extract features of the time series of the state parameters to capture the time features such as the time dependency and long-term memory effect in the sequence;

[0089] The second input layer is used to input a distance matrix;

[0090] The second feature extraction layer is used to extract the spatial features of the state parameters; the graph convolution layer is used to extract the spatial features of the battery corresponding to each element in the distance matrix, and strengthen the position dependence between the batteries;

[0091] The feature fusion layer is used to fuse the time features and space features of the state parameters to generate the time and space features of the state parameters; splicing, weighted fusion or other integration methods are used to fuse the time features and space features into comprehensive time and space features;

[0092] The output layer calculates and outputs the predicted value of the temperature of each battery based on the spatiotemporal characteristics of the state parameters.

[0093] By processing battery status parameter data with spatial and temporal dimensions through the above-mentioned temperature prediction model, it is not only possible to provide fault warnings (by monitoring and predicting whether the temperature exceeds the safety threshold), but also to help understand the changing pattern of temperature distribution in the system, providing a basis for optimizing the cooling system and maintenance plans.

[0094] The dual-defense monitoring module is used to perform health assessment on the dual-defense system of the dual-defense energy storage cabinet; it includes a data acquisition unit and a health assessment unit;

[0095] The data collection unit is used to collect health indicators of the dual defense system and normalize each health indicator;

[0096] The health indicators of the dual protection system include the outlet flow of the heat exchanger, the inlet and outlet temperature difference of the heat exchanger, the water tank liquid level, the booster pump efficiency, the refrigerant pressure, the compressor efficiency, the exhaust fan speed, the exhaust fan noise, the ventilation resistance, and the injection system pressure;

[0097] The inlet and outlet temperature difference of the heat exchanger reflects the working efficiency of the heat exchanger. Ideally, if the heat exchange effect is good, the temperature difference between the inlet hot fluid and the outlet cold fluid after heat exchange should be small. A large temperature difference may mean reduced heat exchange efficiency, blockage of the heat exchanger or performance degradation. Maintaining a proper water tank level is essential to ensure continuous and effective water circulation. Too high or too low a liquid level may cause system instability or reduced efficiency, or even damage components such as the pump. The efficiency of the booster pump is the ratio of the effective power of the booster pump to its input power; among them, the effective power of the booster pump refers to the power used by the booster pump to do work on the liquid, and its input power refers to the power provided by the power source (such as an electric motor) that drives the booster pump; the efficiency of the booster pump directly affects the energy consumption, operating cost and emergency response speed of the system. A high-efficiency booster pump means that the required output power can be provided at a lower energy consumption, reducing energy consumption, while also reducing heat generation during operation, which is conducive to the safe and stable operation of the system. This is particularly important in a dual-defense system, because the system needs to respond quickly in an emergency and be on standby for a long time, so an efficient booster pump is of great significance to ensure the reliability and economy of the system. Refrigerant pressure is a key indicator to measure whether the refrigeration system is working properly. The refrigerant pressure must be kept within the design range. Too low may mean insufficient refrigerant, and too high may cause safety risks or system efficiency problems. Compressor efficiency is the ratio of the compressor's cooling capacity to the mechanical energy consumed. The higher the efficiency, the more cooling capacity the compressor can provide with the same energy consumption. The speed of the exhaust fan affects the efficiency of the ventilation system. Too low a speed may cause heat accumulation and increase the risk of fire. The speed should meet the design requirements to ensure sufficient air circulation. Excessive exhaust fan noise and large ventilation resistance also indicate potential failures of the ventilation system. Finally, test the injection system pressure regularly to ensure that it can start quickly in an emergency and that the low-temperature liquid refrigerant can effectively cover the predetermined area.

[0098] The collection of the above health indicators involves the double protection system's heat exchanger efficiency testing, water circulation system testing, refrigeration component function testing, exhaust fan and ventilation system testing, and high-pressure injection system pressure testing, which can conduct a comprehensive investigation of common faults in the double protection system.

[0099] The above health indicators are normalized, and each health indicator is mapped into a score ranging from 0 to 1. The closer the score is to 1, the better the health status of the dual defense system is. In this way, health indicators with different meanings and dimensions can be included in a unified calculation rule, which is convenient for subsequent data processing.

[0100] The health assessment unit calculates a comprehensive health index of the dual defense system based on the health index and transmits the comprehensive health index to the fault response module;

[0101] The calculation formula of the comprehensive health index is as follows:

[0102] ;

[0103] Among them, C represents the comprehensive health index of the dual defense system; represents the normalized health index of the dual defense system; the value range of i is 1, 2, ..., N, where N represents the number of types of health indicators; The weight coefficient representing the i-th health indicator is set by technicians in this field according to actual needs.

[0104] The fault response module is used to respond to the fault of the double-protection energy storage cabinet, send out an alarm signal and a fault response instruction; it includes a fault alarm unit and a fault instruction unit;

[0105] The fault alarm unit is used to receive the status parameters of each battery, the temperature prediction value, and the comprehensive health index of the dual-defense system, and to make a fault judgment on the dual-defense energy storage cabinet and send out an alarm signal, as follows:

[0106] If at least one state parameter of at least one battery exceeds the threshold range of the state parameter, or the predicted temperature value of at least one battery is higher than the temperature threshold, there is a fault in the energy storage system; an alarm signal is issued to indicate the type and scope of the fault; the fault scope is all batteries whose state parameters or predicted temperature values ​​exceed the threshold range.

[0107] If the comprehensive health index is lower than the preset health threshold, the dual defense system has a fault; an alarm signal is issued to prompt the dual defense system to be repaired;

[0108] The fault instruction unit is used to issue fault response instructions, including energy storage fault instructions and dual protection fault instructions.

[0109] The energy storage control module is used to execute the fault response instruction and control the operation of the energy storage system; it includes a first decoding unit and a first execution unit;

[0110] The first decoding unit is used to receive and decode the fault response instruction to generate the energy storage control instruction; the first execution unit is used to execute the energy storage control instruction to control the operation of the energy storage system; specifically as follows:

[0111] If the first decoding unit receives the energy storage fault instruction, it generates a first energy storage control instruction; the first execution unit executes the first energy storage control instruction, lowers the charge and discharge power level of the energy storage system, and cuts off the connection between the faulty battery and the internal circuit and external circuit of the double-protection energy storage cabinet;

[0112] If the first decoding unit receives the dual fault protection instruction, it generates a second energy storage control instruction; the first execution unit executes the second energy storage control instruction to reduce the charging and discharging power level of the energy storage system.

[0113] The dual-protection control module is used to execute the fault response instruction and control the operation of the dual-protection system; it includes a second decoding unit and a second execution unit;

[0114] The second decoding unit is used to receive and decode the fault response instruction to generate a dual-defense control instruction; the second execution unit is used to execute the dual-defense control instruction to control the operation of the dual-defense system; specifically as follows:

[0115] If the second decoding unit receives the energy storage fault instruction, it generates a first dual protection control instruction; the second execution unit executes the first dual protection control instruction, and if the dual protection system is in the standby state, the working state of the dual protection system is switched to the high temperature protection mode; if the dual protection system is in the high temperature protection mode, the working state of the dual protection system is switched to the fire and explosion protection mode;

[0116] If the second decoding unit receives a dual protection fault instruction, it generates a second dual protection control instruction; the second execution unit executes the second dual protection control instruction, stops the dual protection system, and issues a maintenance notice for the dual protection system.

[0117] The monitoring display module is used to visually display the status information of the double-protection energy storage cabinet and send the alarm signal to the management personnel. It includes a visualization unit and an alarm unit;

[0118] The visualization unit is used to visualize the status information of the dual-defense energy storage cabinet, including the status parameters of each battery, the temperature prediction value, the health index of the dual-defense system, the comprehensive health index, and the alarm signal;

[0119] The alarm unit is used to send an alarm signal to management personnel, including but not limited to text messages, emails and other sending methods.

[0120] Example 2

[0121] This embodiment is the second embodiment of the present invention; it is based on the same inventive concept as embodiment 1, Figure 2 ,This embodiment introduces a double-defense energy storage cabinet, including an energy storage system, a double-defense system, and a fault detection system;

[0122] The energy storage system is used to store electric energy and is equipped with drawers, all of which are arranged in order from top to bottom; each drawer is provided with a battery slot, each of which accommodates an energy storage battery;

[0123] The dual protection system is used to cool down the energy storage system, and is provided with a high temperature protection mode and a fire and explosion protection mode; it includes a water tank, a high temperature protection component and a fire and explosion protection component;

[0124] Any high temperature protection component includes a high temperature protection pipeline, a heat exchanger and an exhaust fan, wherein the high temperature protection pipeline connects the heat exchanger and the water tank to form a liquid circulation pipeline;

[0125] Any fire and explosion proof assembly includes a fire and explosion proof pipeline and a high-pressure nozzle. The fire and explosion proof pipeline is connected to a water tank. One end of the fire and explosion proof pipeline is connected to a high-pressure nozzle. The high-pressure nozzle is arranged in a drawer cabinet. The water tank is provided with a refrigeration component and a liquid refrigerant. The liquid refrigerant is provided with an ice melting agent.

[0126] The fault detection system is used for fault detection of the double-defense energy storage cabinet; it includes status monitoring and temperature prediction of the energy storage system, health assessment of the double-defense system, and fault response of the double-defense energy storage cabinet.

[0127] The specific functions of the above fault detection system are implemented by referring to the relevant contents of the fault detection system for the double-protection energy storage cabinet described in Example 1, which will not be described in detail.

[0128] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0129] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the purpose and scope of protection of the present invention, which are all within the protection of the present invention.

Claims

1. A fault detection system for a double-protection energy storage cabinet, characterized in that: It includes energy storage monitoring module, temperature prediction module, energy storage control module, dual protection monitoring module, dual protection control module, fault response module and monitoring display module; among which: The energy storage monitoring module is used to monitor the status of the energy storage system of the double-protection energy storage cabinet; The dual-defense monitoring module is used to perform health assessment on the dual-defense system of the dual-defense energy storage cabinet; The temperature prediction module performs temperature prediction of the energy storage system based on the result of the state monitoring; The temperature prediction module includes a space unit, which is used to establish a distance matrix for each battery in the double-protection energy storage cabinet, and the method is as follows: S101: Divide the space where the battery module of the double-protection energy storage cabinet is located into three-dimensional grids, where each three-dimensional grid corresponds to a battery slot; S102: Encode the three-dimensional grid; S103: Establishing a three-dimensional coordinate system and calculating the distance between any two three-dimensional grids; S104: constructing a distance matrix covering all batteries in the double-protection energy storage cabinet based on the distance between any two three-dimensional grids; The temperature prediction module also includes a time unit for establishing a time series of each state parameter of each battery, the method is as follows: S201: Standardizing the status parameters of each battery; S202: Establishing a time series of state parameters for each battery, including a temperature series, a voltage series, a current series, an internal resistance series, and an insulation resistance series; S203: extracting the timestamp of the temperature sequence of each battery; S204: by sampling and linear interpolation, the elements in the voltage sequence, current sequence, internal resistance sequence, and insulation resistance sequence of each battery are made to correspond to the timestamps of the corresponding temperature sequence one by one; The temperature prediction module further includes a prediction model unit; the prediction model unit is configured with a temperature prediction model for predicting the temperature of each battery and transmitting the temperature prediction value of each battery to the fault response module; The temperature prediction model has a distance matrix and a time series of each state parameter of each battery as input, and outputs a predicted value of the temperature of each battery; it includes a first input layer, a first feature extraction layer, a second input layer, a second feature extraction layer, a feature fusion layer, and an output layer; The first input layer is used to input the time series of each state parameter of each battery; The first feature extraction layer is used to extract the time features of the state parameters; The second input layer is used to input a distance matrix; The second feature extraction layer is used to extract the spatial features of the state parameters; The feature fusion layer is used to fuse the temporal features and spatial features of the state parameters to generate the temporal and spatial features of the state parameters; The output layer calculates and outputs a predicted value of the temperature of each battery based on the spatiotemporal characteristics of the state parameters; The fault response module is used to respond to the fault of the double-protection energy storage cabinet and send out an alarm signal and a fault response instruction; The energy storage control module is used to execute the fault response instruction and control the operation of the energy storage system; The dual protection control module is used to execute the fault response instruction and control the operation of the dual protection system; The monitoring and display module is used to visually display the status information of the double-protection energy storage cabinet and send the alarm signal to the management personnel.

2. The fault detection system for the double-protection energy storage cabinet according to claim 1, characterized in that: The energy storage monitoring module includes a sensor unit and a data cleaning unit; the sensor unit is configured with a temperature sensor, a voltage sensor, a current sensor, an internal resistance sensor, and an insulation resistance sensor, and is used to collect the status parameters of each battery in the double-protection energy storage cabinet in real time, including temperature, voltage, current, internal resistance, and insulation resistance; the data cleaning unit is used to clean the status parameters of each battery and transmit them to the fault response module and the temperature prediction module respectively.

3. The fault detection system for the double-protection energy storage cabinet according to claim 2, characterized in that: The dual-defense monitoring module is used to perform health assessment on the dual-defense system of the dual-defense energy storage cabinet; It includes data collection unit and health assessment unit; The data collection unit is used to collect health indicators of the dual defense system and normalize each health indicator; The health indicators of the dual protection system include the outlet flow of the heat exchanger, the inlet and outlet temperature difference of the heat exchanger, the water tank liquid level, the booster pump efficiency, the refrigerant pressure, the compressor efficiency, the exhaust fan speed, the exhaust fan noise, the ventilation resistance, and the injection system pressure; The health assessment unit calculates a comprehensive health index of the dual defense system based on the health index and transmits the comprehensive health index to the fault response module; The calculation formula of the comprehensive health index is as follows: ； Among them, C represents the comprehensive health index of the dual defense system; represents the normalized health index of the dual defense system; the value range of i is 1, 2, ..., N, where N represents the number of types of health indicators; Represents the weight coefficient of the i-th health indicator.

4. The fault detection system for the double-protection energy storage cabinet according to claim 3, characterized in that: The fault response module includes a fault alarm unit and a fault instruction unit; The fault alarm unit is used to receive the status parameters of each battery, the temperature prediction value, and the comprehensive health index of the dual-defense system, and to make a fault judgment on the dual-defense energy storage cabinet and send out an alarm signal, as follows: If at least one state parameter of at least one battery exceeds the threshold range of the state parameter, or the predicted temperature value of at least one battery is higher than the temperature threshold, the energy storage system has a fault; an alarm signal is issued to indicate the type and scope of the fault; If the comprehensive health index is lower than the preset health threshold, the dual defense system has a fault; an alarm signal is issued to prompt the dual defense system to be repaired; The fault instruction unit is used to issue fault response instructions, including energy storage fault instructions and dual protection fault instructions.

5. The fault detection system for the double-protection energy storage cabinet according to claim 4, characterized in that: The energy storage control module includes a first decoding unit and a first execution unit; the first decoding unit is used to receive and decode the fault response instruction and generate the energy storage control instruction; the first execution unit is used to execute the energy storage control instruction to control the operation of the energy storage system; The dual-protection control module includes a second decoding unit and a second execution unit; the second decoding unit is used to receive and decode the fault response instruction and generate a dual-protection control instruction; The second execution unit is used to execute the dual-defense control instruction to control the operation of the dual-defense system; If the first decoding unit receives the energy storage fault instruction, it generates a first energy storage control instruction; the first execution unit executes the first energy storage control instruction, lowers the charge and discharge power level of the energy storage system, and cuts off the connection between the faulty battery and the internal circuit and external circuit of the double-protection energy storage cabinet; If the second decoding unit receives the energy storage fault instruction, it generates a first dual-prevention control instruction; The second execution unit executes the first dual protection control instruction. If the dual protection system is in standby mode, the working state of the dual protection system is switched to high temperature protection mode. If the dual protection system is in high temperature protection mode, the working state of the dual protection system is switched to fire and explosion protection mode.

6. The fault detection system for the double-protection energy storage cabinet according to claim 5, characterized in that: If the first decoding unit receives the dual fault protection instruction, it generates a second energy storage control instruction; the first execution unit executes the second energy storage control instruction to reduce the charging and discharging power level of the energy storage system; If the second decoding unit receives a dual protection fault instruction, it generates a second dual protection control instruction; the second execution unit executes the second dual protection control instruction, stops the dual protection system, and issues a maintenance notice for the dual protection system.

7. A double-protection energy storage cabinet, characterized in that: comprising an energy storage system, a dual protection system, and a fault detection system as claimed in any one of claims 1 to 6; The energy storage system is used to store electric energy and is equipped with drawers, all of which are arranged in order from top to bottom; each drawer is provided with a battery slot, each of which accommodates an energy storage battery; The dual protection system is used to cool down the energy storage system, and is provided with a high temperature protection mode and a fire and explosion protection mode; it includes a water tank, a high temperature protection component and a fire and explosion protection component; The fault detection system is used for fault detection of the double-defense energy storage cabinet; it includes status monitoring and temperature prediction of the energy storage system, health assessment of the double-defense system, and fault response of the double-defense energy storage cabinet.

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