Method for carrying out overcharge protection by utilizing voltage change rate

Abstract

The invention discloses a method for carrying out overcharge protection by utilizing a voltage change rate, which comprises the steps of S1, monitoring the voltage change rate in real time, S2, carrying out data analysis processing and early warning, S3, processing an abnormal condition, S4, carrying out settlement comparison on a recorded result and the like, so as to obtain an abnormal result of the voltage change rate of a battery. According to the method, by monitoring the voltage change rate of the battery in real time, the abnormal performance of the battery can be found in time, the real-time performance and the accuracy of battery testing are improved, the safety and the reliability of the battery can be guaranteed, early warning can be carried out on the overcharge condition of the battery, and potential safety hazards caused by overcharge and overdischarge of the battery due to personnel errors are prevented; and meanwhile, the service life of the battery is ensured, and the abnormity of the voltage change rate can be found in time, so that the battery failure is effectively prevented, the use safety and reliability of the battery are improved, and the safety of testers is also ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery detection, in particular to a method for overcharge protection by using voltage change rate. BACKGROUND

[0002] A battery is a device capable of converting chemical energy into electrical energy, among which ternary lithium batteries and lithium iron phosphate batteries are more widely used. The voltage range of ternary lithium batteries and lithium iron phosphate batteries is quite different during use. During battery testing, the voltage higher than the voltage window that the electrolyte can withstand will accelerate the decomposition process of the electrolyte, and the decomposition products also contain flammable gas, which damages the conductivity of the electrolyte.

[0003] The stability and reliability of battery performance are crucial for the normal operation of various electronic devices and vehicles. During battery testing, due to differences in cell models and systems, there are mistakes, and overvoltage charging means putting too many lithium ions into the limited space of the anode, which may be squeezed and exploded, or the road may be blocked, which can easily lead to battery failure. For the cathode, too many lithium ions are driven away from the anode lattice structure, affecting the structural stability and causing local collapse. Excess lithium ions in the anode cannot be inserted and will deposit on the electrode surface, forming dendritic growth. Therefore, during long-term battery testing, excessive charging of the battery can seriously affect the performance of the battery, causing the battery to age and fail, thereby affecting the safety of the test personnel.

[0004] Currently, in the prior art, for the excessive charging during long-term battery testing, a manual data follow-up method is generally used to judge the abnormal condition of the battery, but the manual method has certain timeliness and delay, which cannot timely discover the abnormal condition of the battery. SUMMARY

[0005] The present application aims to provide a method for overcharge protection by using voltage change rate to solve the above defects.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme:

[0007] A method for overcharge protection by using voltage change rate, comprising the following steps:

[0008] S1, real-time monitoring of voltage change rate: using a debug calibrated detection device to monitor the voltage of the battery, recording the monitoring voltage in real time, the interval being one second, and recording the obtained voltage change rate;

[0009] S2, data analysis processing and early warning: comparing and analyzing the collected data, comparing the difference between the actual measurement value and the expected set value, and checking whether the measurement voltage change rate is abnormal; at the same time, real-time analysis is carried out on the data, and early warning is carried out;

[0010] S3, processing abnormal situation: once the abnormal situation of the measurement voltage change rate is found, the test is suspended, and the connection of the detection equipment is processed and restored to ensure the accuracy of the data; at the same time, the abnormal data is recorded, and the test and data analysis are continued after the processing and restoration;

[0011] S4, settlement comparison record result: all test results and analysis reports are recorded, and the final summary is compared to obtain the abnormal result of the battery voltage change rate.

[0012] Preferably, in the S1 step, before the voltage monitoring of the battery, various suitable devices need to be selected according to the model and specification of the battery to be detected, and the various suitable devices are checked and calibrated to ensure that they can operate normally and are calibrated to the selected battery of the appropriate model specification to ensure their detection accuracy. Before the formal voltage monitoring of the battery, the detection accuracy of the battery can be ensured without error through the inspection, debugging and calibration of the related equipment. The accuracy of the equipment is usually in the thousandth place, and if an error occurs, it will cause the equipment to produce a false alarm, resulting in a delay in the test.

[0013] Preferably, the various suitable devices include a battery tester for measuring the battery voltage change rate, a battery clamp for ensuring stable battery connection and measurement, a battery charger and protection device for battery power supply, a computer, data recorder and information transmission module for recording and analyzing test results and realizing real-time monitoring and analysis of the battery voltage change rate and information transmission. The battery clamp can maintain the stability of the connection and measurement of the battery, the battery charger and protection device can charge and protect the battery, the battery tester can detect the voltage change rate of the battery during charging, and the computer, data recorder and information transmission module can monitor, record, transmit, analyze and store the voltage change rate data of the battery during charging.

[0014] Preferably, the protection device includes a temperature sensor for monitoring temperature to prevent overheating and overcooling damage, a short circuit protection device, an overcurrent protection device and a voltage monitoring device. The battery is prone to overcharging during charging, and the temperature sensor for monitoring temperature to prevent overheating and overcooling damage, the short circuit protection device, the overcurrent protection device and the voltage monitoring device can effectively avoid the above situations.

[0015] Preferably, the protection device is a battery testing module. The battery testing module can effectively reduce the likelihood of abnormal battery conditions.

[0016] Preferably, after obtaining an abnormal result regarding the battery voltage change rate in step S4, the battery needs to undergo regular maintenance and testing. Specifically, this involves regularly monitoring the battery voltage change rate in real time, and simultaneously maintaining the battery and voltage testing equipment to ensure stable long-term operation of both the battery and the electronic testing equipment. The interval between these regular tests is one year. Regular maintenance and testing of the battery ensures its stability and reduces safety risks.

[0017] Preferably, various applicable devices are inspected, debugged, and calibrated. Specific steps include: preparing a standard battery, connecting the device, turning on the device, and calibrating the device. These steps ensure the stability of the device during testing and prevent abnormal alarms caused by external factors during the testing process.

[0018] Preferably, step S2 specifically includes:

[0019] Data acquisition: First, the battery voltage change rate needs to be detected in real time using detection equipment, and data parameters from the voltage detection point need to be collected. The specific data parameters include the voltage change rate.

[0020] Data processing: The collected data parameters are processed, including data cleaning, noise reduction and correction steps, to ensure the accuracy and reliability of the data;

[0021] Data Analysis: Statistical and mathematical methods are used to analyze the processed data, calculate the battery voltage change rate index, and perform trend analysis. In the data analysis, the voltage change rate curve is calculated by measuring the voltage across the current test contacts. The voltage change rate test uses the voltage range under long-term duty cycle. Simultaneously, as the voltage change rate steadily increases, the voltage change rate is simulated during normal operation of the equipment. The test current is flexibly adjusted to ensure accurate monitoring of the voltage change rate. During the measurement period, the voltage change rate = monitoring voltage / test time.

[0022] Fault diagnosis: Based on the data obtained from the analysis, the battery voltage change rate is evaluated and diagnosed to identify possible faults or abnormalities. The specific abnormality diagnosis standard is that if the battery voltage change / time exceeds the set value of 0.005V / S, it is judged as an abnormal state.

[0023] Prediction and early warning: Based on data analysis results, voltage change rate and fault warnings can be generated, and timely measures can be taken for handling and maintenance;

[0024] Data visualization: The analysis results are visualized in the form of charts and curves, making it easier for engineers and operators to intuitively understand the status and trends of the battery.

[0025] During data analysis, processing, and early warning, the analysis results are visualized using charts and curves, allowing testers to intuitively understand the battery's status and trends. This also helps in the daily analysis of abnormal battery conditions and the summarization of experience.

[0026] The beneficial effects of this invention are as follows:

[0027] This invention discloses a method for overcharge protection using voltage change rate. By monitoring the battery's voltage change rate in real time, it can promptly detect abnormal battery performance, improving the real-time nature and accuracy of battery testing and helping to ensure battery safety and reliability. It enables real-time monitoring during battery operation, providing early warnings of overcharging, and simultaneously detecting and analyzing the voltage change rate in real time. This prevents overcharging and over-discharging due to human error, thus avoiding safety hazards. Furthermore, it ensures battery lifespan by promptly detecting abnormal voltage change rates, effectively preventing battery failure, improving battery safety and reliability, and also protecting the safety of testing personnel. Attached Figure Description

[0028] Figure 1 : Flowchart of the present invention;

[0029] Figure 2 : A schematic diagram showing that the battery detected a normal rate of voltage change in Embodiment 1 of the present invention;

[0030] Figure 3 : A schematic diagram showing that the battery detected a normal rate of voltage change in Embodiment 2 of the present invention;

[0031] Figure 4 : Schematic diagram of abnormal voltage change rate detected in battery in Embodiment 2 of the present invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1:

[0034] like Figure 1 As shown, an overcharge protection method using voltage change rate according to the present invention includes the following steps:

[0035] S1. Real-time monitoring of voltage change rate: The battery voltage is monitored using a calibrated and debugged testing device. The monitored voltage is recorded in real time at one-second intervals, and the obtained voltage change rate is also recorded.

[0036] Before monitoring the voltage of a battery, it is necessary to select various applicable devices according to the model and specifications of the battery to be tested, and to check, debug and calibrate the various applicable devices to ensure that they can operate normally and to adjust them to the appropriate model and specifications of the selected battery to ensure the accuracy of the test.

[0037] Various applicable equipment includes: a battery tester for measuring battery voltage change rate and other parameters; a battery clamp for ensuring stable battery connection and measurement; a battery charger and protection device for supplying power to the battery; and a computer, data logger, and information transmission module for recording and analyzing test results and realizing real-time monitoring and analysis of battery voltage change rate, as well as information transmission. The data logger uses an 8423 recorder and has an internal data acquisition cable.

[0038] The protection devices during battery testing are part of the battery testing module, including: a temperature sensor for monitoring temperature to prevent damage caused by overheating or overcooling; an overcharge protection device to prevent battery damage caused by overcharging; an over-discharge protection device to prevent excessive battery discharge and protect battery performance and lifespan; a short-circuit protection device to prevent battery short circuits from causing fire or explosion; an overcurrent protection device to prevent battery overload and protect the battery and testing equipment; and a voltage monitoring device to detect voltage and ensure that the voltage is within a safe range.

[0039] The battery overcharge protection and over-discharge protection devices are configured as a Battery Management System (BMS). A BMS is an integrated circuit that monitors battery parameters such as voltage, current, and temperature, and provides protective control to prevent overcharging, over-discharging, and overheating. The short-circuit protection device is a fuse, and the voltage monitoring device is a voltage detector, model HIOKI 8423 / 8948.

[0040] The process involves inspecting, debugging, and calibrating various applicable devices. The specific steps include: preparing standard batteries, connecting the devices, turning on the devices, and calibrating the devices.

[0041] The battery voltage is monitored using calibrated testing equipment. During battery testing, a voltage change rate determination condition is added during the charging process of the battery test step. The voltage / time is monitored at one-second intervals. The voltage change rate is monitored during the charging process of the test step, and the voltage C / time S is calculated simultaneously, performing real-time calculations per second. Furthermore, by calculating dv / dt ≥ 0.004V, overcharging of the battery cells can be avoided. Figure 2 This indicates that when the battery voltage change rate exceeds the upper limit, there will be a point where the voltage change rate exceeds the specified range, facilitating data processing and judgment by testers regarding anomalies in the voltage change rate. For example... Figure 2 As shown, the voltage change rate remains below 0.005 / S under normal conditions.

[0042] S2. Data Analysis, Processing, and Early Warning: The collected and recorded data are compared and analyzed to determine the difference between the actual measured values ​​and the expected set values. Any anomalies in the measured voltage change rate are checked to ensure the accuracy of the detection data and the accuracy of the data comparison results. Simultaneously, real-time data analysis and early warning are performed. Upon detecting anomalies in the battery voltage change rate, an alert is issued indicating an abnormality in the test, and the test is suspended. Timely measures are taken for handling and maintenance. Details are as follows:

[0043] Data acquisition: First, the battery voltage change rate needs to be detected in real time using detection equipment to collect data parameters at the voltage detection point. The specific data parameters include voltage, current, temperature, voltage change rate, etc.

[0044] Data processing: The collected data parameters are processed, including data cleaning, noise reduction and correction, to ensure the accuracy and reliability of the data.

[0045] Data analysis: Statistical and mathematical methods are used to analyze the processed data, including calculating indicators such as battery resistance and voltage change rate, and conducting trend analysis.

[0046] In data analysis, the voltage change rate is calculated using DV (voltage change) / DT (unit time) ≥ 0.004V. The contact voltage change rate curve is calculated by measuring the voltage across the current test contact. The maximum operating current under long-term duty cycle is used for voltage change rate testing to avoid deviations caused by the test equipment. At the same time, the current change rate increases with stable voltage and rising temperature. Using a large current can simulate the voltage change rate during normal operation of the equipment. The test current can be flexibly adjusted to ensure accurate monitoring of the voltage change rate. During the measurement period, the voltage change rate = monitoring voltage / test time.

[0047] Fault diagnosis: Based on the data obtained from the analysis, the battery voltage change rate is evaluated and diagnosed to identify possible faults or abnormalities. The specific abnormality diagnosis standard is that if the battery voltage change / time exceeds the set value of 0.005V / S, it is judged as an abnormal state.

[0048] Prediction and early warning: Based on the data analysis results, voltage change rate and fault warnings can be generated, and timely measures can be taken for handling and maintenance.

[0049] Data visualization: Visualize the analysis results in the form of charts, curves, etc., so that engineers and operators can intuitively understand the status and trends of the battery.

[0050] S3. Handling Abnormal Situations: If an abnormality is detected in the measured voltage change rate, suspend the test and restore the connection of the testing equipment to ensure data accuracy; at the same time, when an abnormality in the battery voltage change rate is detected, record the abnormal data, and continue testing and data analysis after restoration.

[0051] S4. Settlement and Comparison Record Results: Record all test results and analysis reports. If the battery voltage change rate shows abnormal fluctuations, record the abnormal data and suspend the test. After processing and resuming the test, continue recording the test data and compare the final summary to obtain the abnormal results of the battery voltage change rate.

[0052] After obtaining abnormal results regarding the battery voltage change rate, regular maintenance and testing of the battery are required. Specifically, this includes regularly monitoring the battery voltage change rate in real time, and regularly maintaining the battery and voltage testing equipment to ensure that the battery and electronic testing equipment can operate stably for extended periods. The interval between regular testing is one year.

[0053] Example 2:

[0054] like Figure 1 As shown, an overcharge protection method using voltage change rate according to the present invention includes the following steps:

[0055] S1. Real-time monitoring of voltage change rate: The battery voltage is monitored using a calibrated and debugged testing device. The monitored voltage is recorded in real time at one-second intervals, and the obtained voltage change rate is also recorded.

[0056] Before monitoring the voltage of a battery, it is necessary to select various applicable devices according to the model and specifications of the battery to be tested, and to check, debug and calibrate the various applicable devices to ensure that they can operate normally and to adjust them to the appropriate model and specifications of the selected battery to ensure the accuracy of the test.

[0057] Various applicable equipment includes: a battery tester for measuring battery voltage change rate and other parameters; a battery clamp for ensuring stable battery connection and measurement; a battery charger for supplying power to the battery; a battery protection device for ensuring battery safety during testing and preventing overcharging, over-discharging, etc.; and a computer, data logger, and information transmission module for recording and analyzing test results, realizing real-time monitoring and analysis of battery voltage change rate, and information transmission. The data logger uses an 8423 recorder and has an internal acquisition cable.

[0058] The protection devices during battery testing are part of the battery testing module, including: a temperature sensor for monitoring temperature to prevent damage caused by overheating or overcooling; an overcharge protection device to prevent battery damage caused by overcharging; an over-discharge protection device to prevent excessive battery discharge and protect battery performance and lifespan; a short-circuit protection device to prevent battery short circuits from causing fire or explosion; an overcurrent protection device to prevent battery overload and protect the battery and testing equipment; and a voltage monitoring device to detect voltage and ensure that the voltage is within a safe range.

[0059] The battery overcharge protection and over-discharge protection devices are configured as a Battery Management System (BMS). A BMS is an integrated circuit that monitors battery parameters such as voltage, current, and temperature, and provides protective control to prevent overcharging, over-discharging, and overheating. The short-circuit protection device is a fuse, and the voltage monitoring device is a voltage detector, model HIOKI 8423 / 8948.

[0060] The process involves inspecting, debugging, and calibrating various applicable devices. The specific steps include: preparing standard batteries, connecting the devices, turning on the devices, and calibrating the devices.

[0061] The battery voltage is monitored using calibrated testing equipment. During battery testing, a voltage change rate determination condition is added during the charging step of the battery test process. The voltage / time is monitored at one-second intervals. The voltage change rate is monitored during the charging process of the test step, and the voltage C / time S is calculated simultaneously for real-time calculation per second. Real-time monitoring of the voltage change rate is also achieved by setting dv / dt ≥ 0.004V to prevent overcharging of the battery cells. Simultaneously, through… Figure 3 and appendix Figure 4 This allows the battery voltage change rate curve to show that it rises within a specified range while remaining within the normal range, completing the test process. This facilitates data processing and comparison of the voltage change rate by testers. Figure 3 , Figure 4 As shown, the voltage change rate is normally maintained below 0.005 / s. If an anomaly occurs, it will exceed this range, which can be determined based on... Figure 3Figure 4 To determine if the battery is malfunctioning.

[0062] S2. Data Analysis, Processing, and Early Warning: The collected and recorded data are compared and analyzed to determine the difference between the actual measured values ​​and the expected set values. Any anomalies in the measured voltage change rate are checked to ensure the accuracy of the detection data and the accuracy of the data comparison results. Simultaneously, real-time data analysis and early warning are performed. Upon detecting anomalies in the battery voltage change rate, an alert is issued indicating an abnormality in the test, and the test is suspended. Timely measures are taken for handling and maintenance. Details are as follows:

[0063] Data acquisition: First, the battery voltage change rate needs to be detected in real time using detection equipment to collect data parameters at the voltage detection point. The specific data parameters include voltage, current, temperature, voltage change rate, etc.

[0064] Data processing: The collected data parameters are processed, including data cleaning, noise reduction and correction, to ensure the accuracy and reliability of the data.

[0065] Data analysis: Statistical and mathematical methods are used to analyze the processed data, including calculating indicators such as battery resistance and voltage change rate, and conducting trend analysis.

[0066] In data analysis, the voltage change rate is calculated using DV (voltage change) / DT (unit time) ≥ 0.004V. The contact voltage change rate curve is calculated by measuring the voltage across the current test contact. The maximum operating current under long-term duty cycle is used for voltage change rate testing to avoid deviations caused by the test equipment. At the same time, the current change rate increases with stable voltage and rising temperature. Using a large current can simulate the voltage change rate during normal operation of the equipment. The test current can be flexibly adjusted to ensure accurate monitoring of the voltage change rate. During the measurement period, the voltage change rate = monitoring voltage / test time.

[0067] Fault diagnosis: Based on the data obtained from the analysis, the battery voltage change rate is evaluated and diagnosed to identify possible faults or abnormalities. The specific abnormality diagnosis standard is that if the battery voltage change / time exceeds the set value of 0.005V / S, it is judged as an abnormal state.

[0068] Prediction and early warning: Based on the data analysis results, voltage change rate and fault warnings can be generated, and timely measures can be taken for handling and maintenance.

[0069] Data visualization: Visualize the analysis results in the form of charts, curves, etc., so that engineers and operators can intuitively understand the status and trends of the battery.

[0070] S3. Handling Abnormal Situations: If an abnormality is detected in the measured voltage change rate, suspend the test and restore the connection of the testing equipment to ensure data accuracy; at the same time, when an abnormality in the battery voltage change rate is detected, record the abnormal data, and continue testing and data analysis after restoration.

[0071] S4. Settlement and Comparison Record Results: Record all test results and analysis reports. If the battery voltage change rate shows abnormal fluctuations, record the abnormal data and suspend the test. After processing and resuming the test, continue recording the test data and compare the final summary to obtain the abnormal results of the battery voltage change rate.

[0072] After obtaining abnormal results regarding the battery voltage change rate, regular maintenance and testing of the battery are required. Specifically, this includes regularly monitoring the battery voltage change rate in real time, and regularly maintaining the battery and voltage testing equipment to ensure that the battery and electronic testing equipment can operate stably for extended periods. The interval between regular testing is one year.

[0073] In summary, this invention provides an overcharge protection method utilizing voltage change rate. By monitoring the battery's voltage change rate in real time, it can promptly detect abnormal battery performance, preventing potential safety hazards. This improves the real-time performance and accuracy of battery testing, contributing to battery safety and reliability, ensuring normal power output during operation, and extending battery life. It enables real-time monitoring of battery operation, providing early warnings of overcharging, and simultaneously detecting and analyzing the voltage change rate in real time. This prevents overcharging and over-discharging due to human error, thus avoiding safety hazards. Furthermore, it ensures battery lifespan by promptly detecting abnormal voltage change rates, effectively preventing battery failure, improving battery safety and reliability, and protecting the safety of testing personnel. Real-time voltage change rate monitoring helps managers identify problems promptly, reducing maintenance costs and repair time, and improving the operational efficiency of the battery testing system.

[0074] The invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the invention, or the direct application of the inventive concept and technical solution to other situations without modification, is within the protection scope of the invention.

Claims

1. A method for overcharge protection using voltage change rate, characterized in that, Includes the following steps: S1. Real-time monitoring of voltage change rate: The battery voltage is monitored using a calibrated and debugged testing device. The monitored voltage is recorded in real time at one-second intervals, and the obtained voltage change rate is also recorded. S2. Data Analysis, Processing, and Early Warning: Compare and analyze the collected and recorded data to determine the difference between the actual measured value and the expected set value, and check for any abnormalities in the measured voltage change rate; simultaneously, perform real-time data analysis and issue early warnings. S3. Handling Abnormal Situations: If an abnormality is found in the measured voltage change rate, suspend the test and restore the connection of the testing equipment to ensure data accuracy; at the same time, record the abnormal data, and continue testing and data analysis after the restoration is completed. S4. Settlement and Comparison Record Results: Record all test results and analysis reports, and compare them with the final summary to obtain abnormal results of battery voltage change rate.

2. The method for overcharge protection using voltage change rate according to claim 1, characterized in that, In step S1, before monitoring the battery voltage, it is necessary to select various applicable devices according to the model and specifications of the battery to be tested, and to check, debug and calibrate the various applicable devices to ensure that they can operate normally, and to adjust them to the appropriate model and specifications of the selected battery to ensure their testing accuracy.

3. The method for overcharge protection using voltage change rate according to claim 2, characterized in that, The various applicable devices include: a battery tester for measuring the rate of change of battery voltage, a battery clamp for ensuring stable battery connection and measurement, a battery charger and protection device for supplying power to the battery, and a computer, data logger and information transmission module for recording and analyzing test results and realizing real-time monitoring and analysis of the rate of change of battery voltage as well as information transmission.

4. The method for overcharge protection using voltage change rate according to claim 3, characterized in that, The protection device includes a temperature sensor for monitoring temperature to prevent damage caused by overheating or overcooling, as well as a short-circuit protection device, an overcurrent protection device, and a voltage monitoring device.

5. The method for overcharge protection using voltage change rate according to claim 4, characterized in that, The protection device is a battery testing module.

6. The method for overcharge protection using voltage change rate according to claim 1, characterized in that, After obtaining abnormal results for the battery voltage change rate in step S4, the battery needs to be regularly maintained and tested. Specifically, the battery voltage change rate should be monitored in real time regularly, and the battery and voltage testing equipment should be maintained regularly to ensure that the battery and electronic testing equipment can operate stably for a long time. The interval between regular tests is 1 year.

7. The method for overcharge protection using voltage change rate according to claim 1, characterized in that, The process involves inspecting, debugging, and calibrating various applicable devices. The specific steps include: preparing standard batteries, connecting the devices, turning on the devices, and calibrating the devices.

8. The method for overcharge protection using voltage change rate according to claim 1, characterized in that, The S2 step specifically includes: Data acquisition: First, the battery voltage change rate needs to be detected in real time using detection equipment, and data parameters from the voltage detection point need to be collected. The specific data parameters include the voltage change rate. Data processing: The collected data parameters are processed, including data cleaning, noise reduction and correction steps, to ensure the accuracy and reliability of the data; Data Analysis: Statistical and mathematical methods are used to analyze the processed data, calculate the battery voltage change rate index, and perform trend analysis. In the data analysis, the voltage change rate curve is calculated by measuring the voltage across the current test contacts. The voltage change rate test uses the voltage range under long-term operating conditions. Simultaneously, the voltage change rate steadily increases as the battery is charged by current, with changes in charge leading to voltage changes. The voltage change rate is simulated during normal operation of the equipment, and the test current is flexibly adjusted to ensure accurate monitoring of the voltage change rate. During the measurement period, the voltage change rate = monitored voltage / test time. Fault diagnosis: Based on the data obtained from the analysis, the battery voltage change rate is evaluated and diagnosed to identify possible faults or abnormalities. The specific abnormality diagnosis standard is that if the battery voltage change / time exceeds the set value of 0.005V / S, it is judged as an abnormal state. Prediction and early warning: Based on data analysis results, voltage change rate and fault early warning can be performed, and timely measures can be taken for handling and maintenance; Data visualization: The analysis results are visualized in the form of charts and curves, making it easier for engineers and operators to intuitively understand the status and trends of the battery.

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