Safety protection method and device in household battery energy storage system based on IMU inertial sensor, and computer readable medium

Abstract

The invention discloses a safety protection method and device in a household battery energy storage system based on an IMU inertial sensor, and a computer readable medium, and the method comprises the steps: obtaining the physical information of a battery, the physical information comprises the angular velocity information, the acceleration information, the angle information, and the vibration and impact information of the battery; performing performance evaluation on the energy storage battery according to the physical information; and according to the evaluation result, an abnormal signal is sent, and the abnormal signal is used for executing a corresponding protection measure instruction. The IMU inertial sensor is applied to safety protection of the household battery energy storage system, real-time monitoring of the motion state of the energy storage system can be achieved, and more accurate data support is provided for safety protection.

Description

Technical Field

[0001] The present invention relates to a safety protection system in a household battery energy storage system, and in particular to a safety protection method, device, and computer-readable medium in a household battery energy storage system based on an IMU inertial sensor. Background Art

[0002] With the rapid development of renewable energy, household battery energy storage systems, as an important part of distributed energy, play an increasingly important role in ensuring household energy supply and improving energy efficiency. However, household battery energy storage systems face a variety of safety hazards during operation, such as overcharging, over-discharging, short circuit, vibration damage, etc. These problems will not only affect the service life of the energy storage system, but may also cause serious accidents such as fire.

[0003] Traditional safety protection measures are mainly implemented through current and voltage monitoring, temperature monitoring and other means, but when faced with complex and changing operating environments, these means often have problems such as slow response speed and insufficient monitoring accuracy.

[0004] For current and voltage monitoring technology:

[0005] Existing household battery energy storage systems generally use current and voltage sensors to monitor the charge and discharge status of battery packs, and set thresholds to prevent overcharging and over-discharging. However, this method mainly relies on the monitoring of electrical parameters, and cannot effectively warn of safety hazards caused by non-electrical factors such as physical vibration and impact (such as internal battery short circuits, loose structures, etc.).

[0006] For temperature monitoring technology:

[0007] Temperature monitoring is another common safety protection method. By installing temperature sensors inside the energy storage system, the temperature of the battery pack and the surrounding environment is monitored in real time to prevent accidents such as fire caused by overheating. However, the response speed of temperature monitoring is relatively slow, and in some cases (such as instantaneous high temperature shock), the protection mechanism may not be triggered in time.

[0008] Insufficient points of existing technical solutions:

[0009] Single monitoring dimension: Existing technologies mainly focus on the monitoring of electrical parameters, and the monitoring of non-electrical factors (such as physical vibration and impact) is not comprehensive enough, resulting in blind spots in safety protection.

[0010] Slow response speed: When an abnormal situation occurs, some safety protection measures (such as temperature monitoring) may not be able to prevent the situation from deteriorating in time due to insufficient response speed.

[0011] Lack of intelligent analysis: Most existing technical solutions only provide data monitoring functions, lack in-depth analysis and intelligent judgment of data, and cannot accurately assess the security risks of the system.

[0012] Poor adaptability: Different household battery energy storage systems have different operating environments and conditions. Existing technical solutions are often difficult to adapt to diverse application scenarios, resulting in a significant reduction in safety protection effects. Summary of the invention

[0013] In order to solve the defects of the above-mentioned prior art, the present invention provides a safety protection method, device, and computer-readable medium based on IMU inertial sensors in household battery energy storage systems. The present invention applies IMU inertial sensors to the safety protection of household battery energy storage systems, which can realize real-time monitoring of the motion state of the energy storage system and provide more accurate data support for safety protection.

[0014] To achieve the above technical objectives, the present invention adopts the following technical solutions: a safety protection method based on IMU inertial sensor in household battery energy storage system, comprising:

[0015] Acquiring physical information of the battery, wherein the physical information includes angular velocity information, acceleration information, angle information, vibration and impact information of the battery;

[0016] Performing performance evaluation on the energy storage battery according to the physical information;

[0017] According to the evaluation result, an abnormal signal is sent, and the abnormal signal is used to execute the corresponding protective measure instruction.

[0018] Based on the physical information, the performance evaluation of the energy storage battery also includes:

[0019] Performing vibration amplitude change rate analysis and vibration peak value analysis on the vibration and impact information to identify the vibration change rate and maximum amplitude of the vibration;

[0020] Comparing the angular velocity information, the acceleration information, the angle information, the vibration change rate and the maximum amplitude with a preset normal range to obtain a comparison result;

[0021] According to the comparison result, an abnormal signal is issued.

[0022] Also includes,

[0023] When the abnormal signal is an abnormal vibration amplitude and change rate alarm protection, it means that the system vibration amplitude and change rate exceed the preset normal range, and the corresponding protection measures are to adjust and shut down the system power input and output and issue an alarm;

[0024] When the abnormal signal is an abnormal alarm protection for tilt amplitude and change rate, it means that the system tilt amplitude and change rate exceed the preset normal range, and the corresponding protection measures are to adjust and shut down the system power input and output and issue an alarm;

[0025] When the abnormal signal is a comprehensive abnormal alarm protection, it means that the system vibration amplitude and change rate, tilt amplitude and change rate are beyond the preset normal range. The corresponding protection measures are to adjust and shut down the system power input and output, start the active fire fighting system and sound an alarm.

[0026] The method further comprises: obtaining electrical information of the battery, wherein the electrical information comprises voltage information, current information and temperature information, wherein the voltage information comprises a battery cell voltage and a battery pack voltage, the current information comprises a charge and discharge current of the battery pack, and the temperature information comprises a temperature of the battery pack;

[0027] The performance of the energy storage battery is evaluated based on the electrical information.

[0028] Based on the electrical information, the performance evaluation of the energy storage battery includes:

[0029] Calculating the voltage difference between each battery cell according to the battery cell voltage;

[0030] When the voltage difference, the charge and discharge current, and the temperature information do not meet the conditions, an abnormal signal is issued.

[0031] When the abnormal signal is an abnormal alarm protection of voltage difference being too high or too low, it means that the voltage difference between the battery cells does not meet the conditions, and the corresponding protection measure is to adjust the voltage difference between the battery cells in the battery pack through active balancing or passive balancing;

[0032] When the abnormal signal is an abnormal alarm protection for charge and discharge current being too high or too low, it means that the charge and discharge current does not meet the conditions, and the corresponding protection measure is to perform charge and discharge management according to external control instructions or built-in charge and discharge management mechanism;

[0033] When the abnormal signal is an abnormal alarm protection for temperature information being too high or too low, it means that the temperature does not meet the conditions, and the corresponding protection measure is to increase or decrease the temperature of the battery.

[0034] A safety protection device based on an IMU inertial sensor in a household battery energy storage system, comprising:

[0035] An inertial sensor module IMU is used to obtain physical information of the battery, including angular velocity information, acceleration information, angle information, vibration and impact information of the battery;

[0036] Battery management unit BMU, used to initialize and calibrate the inertial sensor module IMU;

[0037] Battery pack;

[0038] The control center is used to evaluate the performance of the energy storage battery according to the physical information; and is also used to execute corresponding protective measures according to the evaluation results.

[0039] The battery pack is communicatively connected to the battery management unit BMU, and the inertial sensor module IMU is communicatively connected to the battery management unit BMU.

[0040] The battery management unit BMU is also used to obtain electrical information of the battery, wherein the electrical information includes voltage information, current information, and temperature information. The voltage information includes battery cell voltage and battery pack voltage. The current information includes charge and discharge current of the battery pack. The temperature information includes the temperature of the battery pack. The control center is also used to perform performance evaluation on the energy storage battery based on the electrical information.

[0041] A tangible and non-transitory computer-readable medium comprising one or more computer software modules configured to:

[0042] Obtaining physical information of the battery, including angular velocity information, acceleration information, angle information, vibration and impact information of the battery;

[0043] Evaluate the performance of energy storage batteries based on physical information;

[0044] According to the evaluation results, an abnormal signal is sent, and the abnormal signal is used to execute the corresponding protective measures instructions.

[0045] In summary, the present invention has achieved the following technical effects:

[0046] The present invention improves the accuracy and comprehensiveness of safety protection: Traditional safety protection measures are mainly implemented through current and voltage monitoring, temperature monitoring and other means, but lack the ability to fully perceive the physical state of the battery. This patent can monitor the physical state of the battery system in a more real-time and comprehensive manner by adding an IMU inertial sensor, including the tilt angle and vibration of the equipment.

[0047] Through real-time monitoring and intelligent analysis, the present invention can timely discover and intervene in potential safety hazards through early warning. For example, abnormal vibration of the battery system caused by a vibration source or manual handling of a system in operation can be promptly powered off for protection, thereby effectively avoiding the occurrence of safety accidents.

[0048] The present invention prolongs the service life of the energy storage system: by taking safety protection measures in a timely manner, the operating time of the energy storage system in an abnormal state is reduced, the risk of system damage is reduced, and the service life of the energy storage system is extended.

[0049] The present invention promotes the popularization and development of household battery energy storage systems: by improving the safety protection level, it enhances users' confidence and recognition of household battery energy storage systems, which is conducive to promoting the popularization and development of household battery energy storage systems.

[0050] The present invention applies IMU inertial sensors in household battery energy storage systems, which helps to improve the stability, safety and efficiency of the equipment, while reducing maintenance costs and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is a typical system architecture diagram of a household battery energy storage system provided by an embodiment of the present invention;

[0052] Figure 2 is the battery system provided by this embodiment;

[0053] Figure 3 This is the connection circuit diagram between the inertial sensor module IMU and the MCU. DETAILED DESCRIPTION

[0054] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0055] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] Embodiment 1:

[0061] A household battery energy storage system is an energy storage solution used in a home or residential environment. Figure 1 This is a typical system architecture diagram of a household battery energy storage system. The battery system is a core component used to store, release and manage electrical energy to meet daily household electricity needs or respond to emergencies.

[0062] IMU (Inertial Measurement Unit), a sensor that can detect and measure acceleration and rotational motion in real time, has been widely used in aerospace, autonomous driving, consumer electronics and other fields due to its high precision, high reliability and high sensitivity.

[0063] A safety protection method based on IMU inertial sensor in household battery energy storage system, comprising:

[0064] Acquiring physical information of the battery, wherein the physical information includes angular velocity information, acceleration information, angle information, vibration and impact information of the battery;

[0065] Performing performance evaluation on the energy storage battery according to the physical information;

[0066] According to the evaluation result, an abnormal signal is sent, and the abnormal signal is used to execute the corresponding protective measure instruction.

[0067] Based on the physical information, the performance evaluation of the energy storage battery also includes:

[0068] Performing vibration amplitude change rate analysis and vibration peak value analysis on the vibration and impact information to identify the vibration change rate and maximum amplitude of the vibration;

[0069] Comparing the angular velocity information, the acceleration information, the angle information, the vibration change rate and the maximum amplitude with a preset normal range to obtain a comparison result;

[0070] According to the comparison result, an abnormal signal is issued.

[0071] Also includes,

[0072] When the abnormal signal is an abnormal vibration amplitude and change rate alarm protection, it means that the system vibration amplitude and change rate exceed the preset normal range, and the corresponding protection measures are to adjust and shut down the system power input and output and issue an alarm;

[0073] When the abnormal signal is an abnormal alarm protection for tilt amplitude and change rate, it means that the system tilt amplitude and change rate exceed the preset normal range, and the corresponding protection measures are to adjust and shut down the system power input and output and issue an alarm;

[0074] When the abnormal signal is a comprehensive abnormal alarm protection, it means that the system vibration amplitude and change rate, tilt amplitude and change rate are beyond the preset normal range. The corresponding protection measures are to adjust and shut down the system power input and output, start the active fire fighting system and sound an alarm.

[0075] A safety protection device based on an IMU inertial sensor in a household battery energy storage system, comprising:

[0076] An inertial sensor module IMU is used to obtain physical information of the battery, including angular velocity information, acceleration information, angle information, vibration and impact information of the battery;

[0077] Battery management unit BMU, used to initialize and calibrate the inertial sensor module IMU;

[0078] Battery pack;

[0079] The control center is used to evaluate the performance of the energy storage battery according to the physical information; and is also used to execute corresponding protective measures according to the evaluation results.

[0080] The battery pack is communicatively connected to the battery management unit BMU, and the inertial sensor module IMU is communicatively connected to the battery management unit BMU.

[0081] like Figure 2The figure shows the battery system provided by this embodiment. An IMU inertial sensor module is added. The battery management unit BMU exchanges data with the IMU inertial sensor through a variety of communication interfaces (such as UART, CAN, RS232, RS485), which can realize real-time monitoring of the motion state of the energy storage system and provide more accurate data support for safety protection. The function is mainly realized by the following steps:

[0082] (1) Module installation and configuration: Install the IMU inertial sensor module in the battery system and establish communication with the battery management unit (BMU). Initialize and calibrate the IMU inertial sensor to ensure that the angle, acceleration, angular velocity, etc. of the battery system can be accurately measured.

[0083] (2) Data acquisition and processing: The IMU inertial sensor collects the angle, acceleration, angular velocity and other data of the battery system in real time, and uses the built-in data processing algorithm to filter and denoise the data to improve the accuracy and reliability of the data.

[0084] Household energy storage systems are mainly composed of battery energy storage units, power grids, power loads, etc., and have both AC and DC electrical power. They are usually installed in a fixed manner. If a battery energy storage system is colliding, falling, or squeezed and deformed during operation, or if the electrical system is not completely disconnected in accordance with regulations before transportation, short circuits, leakage and other safety risks are very likely to occur.

[0085] The present invention applies the IMU inertial sensor module to monitor the displacement and other motion states of the energy storage system, mainly by capturing and analyzing the motion state of the energy storage system in space, and mainly monitors the following aspects:

[0086] Acceleration: The accelerometer in the IMU inertial sensor module can measure the linear acceleration of the energy storage system in three axes. This data can be used to determine whether the system is at rest or undergoing acceleration or deceleration. This helps to understand the dynamic behavior of the equipment, such as the acceleration and deceleration of the system equipment during transportation.

[0087] Angular velocity: The accelerometer in the IMU inertial sensor module can measure the angular velocity changes of the energy storage system in three axes. These data can be used to determine the system's tilt angle, rotational motion, etc. For example, in an energy storage system installed on an unstable platform, by monitoring its posture changes, timely measures can be taken to prevent safety hazards caused by excessive tilt.

[0088] Vibration and shock: The IMU inertial sensor module can sensitively capture subtle vibrations and sudden impact events. This information is very important for evaluating the mechanical stress level of the energy storage system and diagnosing potential faults. For example, abnormal high-frequency vibrations may indicate that a component is loose or worn, or nearby mechanical equipment, transportation, or construction activities may generate external vibrations that affect the energy storage system, while strong shocks may be the result of external impacts.

[0089] (3) Motion state analysis: Based on the processed data, the motion state of the energy storage system is analyzed, including parameters such as acceleration, vibration amplitude, angular velocity, and tilt angle, to determine whether the battery system is in an abnormal state.

[0090] (3.1) Vibration amplitude analysis

[0091] Data acquisition: The accelerometer in the IMU inertial sensor module collects acceleration data of the battery system in different directions (usually X, Y, and Z axes) in real time. The main processor MCU of the battery management unit BMU obtains the data collected by the IMU through the UART interface.

[0092] Signal processing: The main processor MCU performs vibration amplitude change rate analysis and vibration peak value analysis on the collected data to identify the vibration change rate and maximum amplitude.

[0093] Data comparison: Compare the measured vibration change rate and vibration amplitude with the preset normal range or threshold, and judge whether the system working status is normal through data comparison and analysis.

[0094] Alarm protection: If an abnormality is detected, the system can trigger an alarm and protection.

[0095] (3.2) Tilt amplitude analysis

[0096] Data acquisition: The gyroscope and accelerometer in the IMU inertial sensor module are used in combination to collect data such as angular velocity and tilt angle of the battery system in real time. The main processor MCU of the battery management unit BMU obtains the data collected by the IMU through the UART interface.

[0097] Signal processing: The main processor MCU performs angle analysis on the collected data.

[0098] Data comparison: Compare the measured angle data with the preset normal range or threshold, and judge whether the system working status is normal through data comparison and analysis.

[0099] Alarm protection: If an abnormality is detected, the system can trigger an alarm and protection.

[0100] (4) Safety risk assessment and early warning: Based on the results of the motion state analysis, the safety risk of the energy storage system is assessed and the corresponding early warning threshold is set. Once the abnormal data detected exceeds the early warning threshold, the safety early warning and protection mechanism is immediately triggered, and the user or system administrator is notified to intervene.

[0101] (5) Execution of safety protection measures: After receiving the safety warning signal, the system automatically executes corresponding safety protection measures, such as cutting off the power supply, starting the fire protection system, adjusting system parameters, etc., to reduce or eliminate safety hazards.

[0102] A tangible and non-transitory computer-readable medium comprising one or more computer software modules configured to:

[0103] Obtaining physical information of the battery, including angular velocity information, acceleration information, angle information, vibration and impact information of the battery;

[0104] Evaluate the performance of energy storage batteries based on physical information;

[0105] According to the evaluation results, an abnormal signal is sent, and the abnormal signal is used to execute the corresponding protective measures instructions.

[0106] The present invention integrates IMU inertial sensors with the safety protection of household battery energy storage systems: IMU inertial sensors are applied to the safety protection of household battery energy storage systems, and early warning and effective prevention and control of safety hazards are achieved by real-time monitoring of the movement state of the energy storage system.

[0107] Multi-parameter comprehensive assessment of safety risks: Not only basic parameters such as acceleration and angular velocity are monitored, but also parameters such as vibration peak value and tilt angle are combined for comprehensive assessment, which improves the accuracy and reliability of safety risk assessment.

[0108] Intelligent early warning and automatic protection: It realizes intelligent early warning and automatic protection of security risks, reduces the delay and error of human intervention, and improves the efficiency and effectiveness of security protection.

[0109] Embodiment 2:

[0110] Of course, the first embodiment uses physical information to determine the performance status of the battery and the alarm prompt. If the battery is being renovated, the second embodiment can also be used under normal conditions. The first embodiment can be combined with the existing system, specifically:

[0111] Based on the first embodiment, the method further includes: obtaining electrical information of the battery, wherein the electrical information includes voltage information, current information, and temperature information, wherein the voltage information includes a battery cell voltage and a battery pack voltage, the current information includes a charge and discharge current of the battery pack, and the temperature information includes a temperature of the battery pack;

[0112] The performance of the energy storage battery is evaluated based on the electrical information.

[0113] Based on the electrical information, the performance evaluation of the energy storage battery includes:

[0114] Calculating the voltage difference between each battery cell according to the battery cell voltage;

[0115] When the voltage difference, the charge and discharge current, and the temperature information do not meet the conditions, an abnormal signal is issued.

[0116] When the abnormal signal is an abnormal alarm protection of voltage difference being too high or too low, it means that the voltage difference between the battery cells does not meet the conditions, and the corresponding protection measure is to adjust the voltage difference between the battery cells in the battery pack through active balancing or passive balancing;

[0117] When the abnormal signal is an abnormal alarm protection for charge and discharge current being too high or too low, it means that the charge and discharge current does not meet the conditions, and the corresponding protection measure is to perform charge and discharge management according to external control instructions or built-in charge and discharge management mechanism;

[0118] When the abnormal signal is an abnormal alarm protection for temperature information being too high or too low, it means that the temperature does not meet the conditions, and the corresponding protection measure is to increase or decrease the temperature of the battery.

[0119] The battery management unit BMU is also used to obtain the electrical information of the battery, the electrical information includes voltage information, current information, and temperature information, the voltage information includes the battery cell voltage and the battery pack voltage, the current information includes the charge and discharge current of the battery pack, and the temperature information includes the temperature of the battery pack; the control center is also used to evaluate the performance of the energy storage battery according to the electrical information

[0120] A tangible and non-transitory computer readable medium comprising one or more computer software modules, the one or more computer software modules further configured to:

[0121] Obtaining electrical information of the battery, the electrical information including voltage information, current information, and temperature information. The voltage information includes battery cell voltage and battery pack voltage. The current information includes charge and discharge current of the battery pack. The temperature information includes the temperature of the battery pack.

[0122] Based on the electrical information, the performance of the energy storage battery is evaluated.

[0123] The battery management unit (BMU) is mainly responsible for real-time monitoring, management and protection of the battery pack to ensure efficient, safe and reliable operation of the battery system. The main functions are briefly described as follows:

[0124] Condition Monitoring:

[0125] Voltage monitoring: Measure the voltage of battery cells and battery packs to ensure that the battery operates in a safe voltage range to prevent overcharging or over-discharging.

[0126] Current monitoring: Measure the charge and discharge current of the battery pack to ensure that the battery operates in a safe current range and prevent overcurrent.

[0127] Temperature monitoring: Measure the temperature of the battery pack to ensure that the battery operates in a safe temperature range to prevent overheating or underheating.

[0128] Performance evaluation:

[0129] Based on the status monitoring information, the battery power, allowable charging and discharging power value, battery health status, etc. are evaluated.

[0130] Alarm protection:

[0131] Monitor the battery pack status in real time. When an abnormality occurs, such as over-voltage, under-voltage, over-temperature, over-current or short circuit, an alarm will be issued or corresponding protection and control measures will be taken.

[0132] Control Management:

[0133] Balancing management: Active or passive balancing is used to adjust the voltage difference between battery cells in the battery pack to ensure battery consistency and extend the overall life of the battery pack.

[0134] Charge and discharge management: Charge and discharge management and control are performed according to external control instructions or built-in charge and discharge management mechanism.

[0135] Data communication:

[0136] Data interaction with other devices is carried out through various communication interfaces (such as CAN, RS232, RS485), including data collection, control, debugging, configuration, etc.

[0137] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A safety protection method based on IMU inertial sensor in household battery energy storage system, characterized by: include, Acquiring physical information of the battery, wherein the physical information includes angular velocity information, acceleration information, angle information, vibration and impact information of the battery; Performing performance evaluation on the energy storage battery according to the physical information; According to the evaluation result, an abnormal signal is sent, and the abnormal signal is used to execute the corresponding protective measure instruction.

2. According to claim 1, a safety protection method based on an IMU inertial sensor in a household battery energy storage system is characterized in that: Based on the physical information, the performance evaluation of the energy storage battery also includes: Performing vibration amplitude change rate analysis and vibration peak value analysis on the vibration and impact information to identify the vibration change rate and maximum amplitude of the vibration; Comparing the angular velocity information, the acceleration information, the angle information, the vibration change rate and the maximum amplitude with a preset normal range to obtain a comparison result; According to the comparison result, an abnormal signal is issued.

3. According to claim 2, a safety protection method based on an IMU inertial sensor in a household battery energy storage system is characterized in that: Also includes, When the abnormal signal is an abnormal vibration amplitude and change rate alarm protection, it means that the system vibration amplitude and change rate exceed the preset normal range, and the corresponding protection measures are to adjust and shut down the system power input and output and issue an alarm; When the abnormal signal is an abnormal alarm protection for tilt amplitude and change rate, it means that the system tilt amplitude and change rate exceed the preset normal range, and the corresponding protection measures are to adjust and shut down the system power input and output and issue an alarm; When the abnormal signal is a comprehensive abnormal alarm protection, it means that the system vibration amplitude and change rate, tilt amplitude and change rate are beyond the preset normal range. The corresponding protection measures are to adjust and shut down the system power input and output, start the active fire fighting system and sound an alarm.

4. A safety protection device based on an IMU inertial sensor in a household battery energy storage system, characterized in that: A safety protection method based on an IMU inertial sensor in a household battery energy storage system as described in any one of claims 1 to 3, comprising: An inertial sensor module IMU is used to obtain physical information of the battery, including angular velocity information, acceleration information, angle information, vibration and impact information of the battery; Battery management unit BMU, used to initialize and calibrate the inertial sensor module IMU; Battery pack; The control center is used to evaluate the performance of the energy storage battery according to the physical information; and is also used to execute corresponding protective measures according to the evaluation results. The battery pack is communicatively connected to the battery management unit BMU, and the inertial sensor module IMU is communicatively connected to the battery management unit BMU.

5. A tangible and non-transitory computer-readable medium, characterized in that: A safety protection method based on an IMU inertial sensor in a household battery energy storage system as described in any one of claims 1 to 3, comprising one or more computer software modules, wherein the one or more computer software modules are configured as follows: Obtaining physical information of the battery, including angular velocity information, acceleration information, angle information, vibration and impact information of the battery; Evaluate the performance of energy storage batteries based on physical information; According to the evaluation results, an abnormal signal is sent, and the abnormal signal is used to execute the corresponding protective measures instructions.

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