A ring main unit battery status monitoring method and system, medium, equipment, and product

Abstract

The present invention belongs to the technical field of battery status monitoring and provides a method and system, medium, equipment, and product for monitoring the battery status of a ring network cabinet. The internal resistance value is converted into a standard internal resistance at room temperature through a temperature correction coefficient, and after obtaining the actual capacity of the battery through a battery capacity correction coefficient and current, the battery status of the ring network cabinet is monitored based on the standard internal resistance and the actual capacity of the battery. The impact of temperature on the internal resistance and capacity is taken into account during the evaluation process, thereby reducing the monitoring deviation. At the same time, the temperature correction coefficient and the battery capacity correction coefficient are both adjusted through the temperature change rate and the effective heat dissipation space of the ring network cabinet, taking into account the impact of the temperature change rate and the structural characteristics of the ring network cabinet itself on the temperature change trend and the battery status, thereby further improving the accuracy of the judgment of the operating status of the battery in the ring network cabinet.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery status monitoring, and in particular relates to a method and system, medium, equipment, and product for monitoring the battery status of a ring main unit. Background Art

[0002] Ring main units generally use small-capacity lead-acid batteries as backup power sources. Since ring main units operate outdoors for a long time, the operating environment is relatively complex, especially in northern regions. The operating temperature can reach 40℃-50℃ in summer and may be below -10℃ in winter. In addition, the humidity fluctuates greatly, which can easily lead to problems such as battery expansion, terminal rust and corrosion. The battery's operating health is poor and its service life does not meet the design requirements.

[0003] Most existing online monitoring systems for batteries in ring main units (RMUs) determine the operating status of batteries by detecting their voltage, current, internal resistance, and capacity. However, parameters such as internal resistance and capacity are closely related to temperature, and most systems fail to consider and correct the impact of these factors, resulting in large deviations in the judgment results. Although some systems take the impact of temperature into account, they do not consider the impact of the temperature change rate and the structural characteristics of the RMU itself on the temperature change trend and battery status, and cannot accurately determine the operating status of the RMU battery. Summary of the Invention

[0004] In order to solve the above problems, the present invention proposes a method and system, medium, equipment, and product for monitoring the battery status of a ring network cabinet. The present invention converts the internal resistance value into a standard internal resistance at room temperature through a temperature correction coefficient, and obtains the actual capacity of the battery through a battery capacity correction coefficient and current. Then, the battery status of the ring network cabinet is monitored according to the standard internal resistance and the actual capacity of the battery. The impact of temperature on the internal resistance and capacity is taken into account in the evaluation process, thereby reducing the monitoring deviation. At the same time, the temperature correction coefficient and the battery capacity correction coefficient are both adjusted through the temperature change rate and the effective heat dissipation space of the ring network cabinet, taking into account the impact of the temperature change rate and the structural characteristics of the ring network cabinet itself on the temperature change trend and the battery status, thereby further improving the accuracy of the judgment of the operating status of the battery in the ring network cabinet.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] In a first aspect, the present invention provides a method for monitoring the battery status of a ring main unit, comprising:

[0007] Obtain the internal resistance, current and temperature of the battery in the ring main unit;

[0008] The internal resistance value is converted into the standard internal resistance at room temperature through the temperature correction coefficient. The temperature correction coefficient is obtained through experiments and is adjusted by the temperature change rate and the effective heat dissipation space of the ring network cabinet.

[0009] The actual capacity of the battery is obtained through the battery capacity correction coefficient and current. The battery capacity correction coefficient is obtained by adjusting the capacity and temperature characteristic curve, the temperature change rate, and the effective heat dissipation space of the ring network cabinet.

[0010] Monitor the battery status of the ring main unit based on the standard internal resistance and the actual capacity of the battery.

[0011] Furthermore, the standard internal resistance at room temperature for:

[0012]

[0013] in, For temperature T The internal resistance of the battery measured at ℃; T is the current temperature; is the temperature correction factor.

[0014] Furthermore, the temperature correction factor for:

[0015]

[0016]

[0017] in, a 0. b 0 and c 0 is the coefficient obtained by binomial fitting; The temperature change rate within a preset time period; It is the effective heat dissipation space of the ring main unit, which is the remaining space after removing all equipment in the ring main unit; and is the conversion parameter.

[0018] Furthermore, the actual capacity of the battery SOC for:

[0019]

[0020] in, I is the battery current; is the sampling period, K T is the battery capacity correction factor at different temperatures.

[0021] Furthermore, the battery capacity correction factor K Tfor:

[0022]

[0023]

[0024] in, is the initial value of the battery capacity correction factor before adjustment; T is the current temperature; a 1. b 1. c 1 and d 1According to the capacity and temperature characteristic curve provided by the battery manufacturer, it is obtained by using a cubic polynomial fitting method; The temperature change rate within a preset time period; Provides effective heat dissipation space for the ring network cabinet; and is the conversion parameter.

[0025] Furthermore, the working state of the battery is determined based on the direction and magnitude of the current. If the battery is in a discharging state, the battery capacity correction coefficient is obtained based on the temperature. The battery discharge capacity is calculated by integrating the current based on the battery voltage and discharge current and corrected based on the battery temperature. The battery discharge state is determined based on the battery voltage. When the battery voltage reaches the battery discharge cut-off voltage, the battery reaches a fully discharged state. The total discharge capacity of the battery at this time, i.e., the effective capacity of the battery, is calculated.

[0026] If the battery is in the charging state, the battery capacity correction factor is calculated based on the temperature. The battery charging current is used to calculate the battery charging capacity by integrating the current and correcting it according to the battery temperature. When the battery current reaches the float charge current, the battery reaches the full charge state. The total charging capacity of the battery at this time is calculated as the effective capacity of the battery.

[0027] If the battery is in a floating charge state, the battery internal resistance is tested by the pulsating DC discharge method. The temperature correction coefficient of the battery internal resistance is obtained by the temperature, and the battery internal resistance is converted into the standard internal resistance at room temperature. The effective capacity of the battery is obtained based on the relationship between the standard internal resistance and capacity.

[0028] According to the effective capacity in the discharge state, charge state and float charge state, the health status of the battery is obtained by the ratio of the current effective capacity to the nominal capacity of the battery.

[0029] In a second aspect, the present invention further provides a ring main unit battery status monitoring system, comprising:

[0030] The data acquisition module is configured to: obtain the internal resistance, current and temperature of the battery in the ring network cabinet;

[0031] The first calculation module is configured to convert the internal resistance value into a standard internal resistance at room temperature using a temperature correction coefficient; wherein the temperature correction coefficient is obtained through an experiment and is adjusted based on the temperature change rate and the effective heat dissipation space of the ring main unit;

[0032] The second calculation module is configured to obtain the actual capacity of the battery through the battery capacity correction coefficient and the current; wherein the battery capacity correction coefficient is obtained by adjusting the capacity and temperature characteristic curve, the temperature change rate, and the effective heat dissipation space of the ring network cabinet;

[0033] The monitoring module is configured to monitor the battery status of the ring main unit according to the standard internal resistance and the actual capacity of the battery.

[0034] In a third aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for monitoring the battery status of a ring main unit described in the first aspect.

[0035] In a fourth aspect, the present invention also provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein when the processor executes the program, the steps of the ring network cabinet battery status monitoring method described in the first aspect are implemented.

[0036] In a fifth aspect, the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the ring main unit battery status monitoring method described in the first aspect are implemented.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] In the present invention, the internal resistance value is converted into the standard internal resistance at room temperature through the temperature correction coefficient, and after the actual capacity of the battery is obtained through the battery capacity correction coefficient and the current, the battery status of the ring network cabinet is monitored according to the standard internal resistance and the actual capacity of the battery. The influence of temperature on the internal resistance and capacity is taken into account in the evaluation process, thereby reducing the monitoring deviation; at the same time, the temperature correction coefficient and the battery capacity correction coefficient are both adjusted through the temperature change rate and the effective heat dissipation space of the ring network cabinet, taking into account the influence of the temperature change rate and the structural characteristics of the ring network cabinet itself on the temperature change trend and the battery status, thereby further improving the accuracy of the judgment of the operating status of the battery in the ring network cabinet.

[0039] The present invention can grasp the real-time status, historical status and changing trends of the battery's voltage, current, internal resistance, capacity, temperature, etc., providing conditions for refined management and maintenance of the battery; it realizes accurate assessment of the battery's health status, making it easy to timely understand whether the battery's remaining capacity meets the backup power supply requirements, whether the battery pack or single cell needs to be repaired or replaced, etc., and can effectively guide the use and maintenance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings constituting a part of the specification of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments and descriptions of this embodiment are used to explain this embodiment and do not constitute an improper limitation on this embodiment.

[0041] Figure 1 Schematic diagram of the monitoring system structure of Example 1 of the present invention;

[0042] Figure 2 1 is the capacity and temperature characteristic curve of Example 1 of the present invention;

[0043] Figure 3 The inverse relationship between internal resistance and capacity in Example 1 of the present invention is shown;

[0044] Figure 4 This is a flow chart of the method of Example 1 of the present invention;

[0045] Figure 5 This is the battery anti-theft alarm module of Example 1 of the present invention. DETAILED DESCRIPTION

[0046] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0047] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0048] Example 1:

[0049] Due to their simple structure, flexible use, compact size, and low price, ring main units (RMUs) have been widely used in distribution stations and box-type substations in load centers such as urban residential areas, high-rise buildings, large public buildings, and factories and enterprises. RMUs typically use small-capacity lead-acid batteries as a backup power source. Because they operate outdoors for long periods of time, the operating environment is complex, especially in northern China, where summer temperatures can reach 40°C to 50°C and winter temperatures can drop below -10°C. Humidity also fluctuates widely, which can easily lead to battery swelling, terminal rust, and corrosion. This results in poor battery health and a service life that falls short of design requirements.

[0050] Based on this, this embodiment provides a method for monitoring the battery status of a ring main unit, and a monitoring system for implementing the monitoring method, such as Figure 1 As shown, the monitoring system includes a main control module, a single battery status detection module, a bus voltage detection module, a bus current detection module, a battery environment temperature and humidity detection and control module, etc.

[0051] The background system is used to display information such as the ambient temperature and humidity inside the ring network cabinet, battery voltage, current and internal resistance, generate data change curves, analyze and judge the health status of the battery, set system parameters, etc.

[0052] The data transfer unit (DTU) is connected to the background system through the network and connected to the main control module through the 485 bus, and forwards the data collected by the main control module to the background system.

[0053] The main control module is developed based on an ARM single-chip microcomputer and includes a power supply circuit, an AD acquisition circuit, an IO input and output circuit, an SBUS bus drive circuit, and an RS485 bus drive circuit, etc. It realizes the conversion between 485 communication and SBUS communication, collects information such as battery voltage, temperature, internal resistance and charging status, and controls each sub-module.

[0054] The main control module is connected to each submodule via the SBUS bus. The SBUS bus is divided into two parts: a receiving circuit and a transmitting circuit. The circuits are isolated by an optical coupler circuit to improve the anti-interference capability.

[0055] The bus voltage detection module mainly includes a voltage detection sensor, which is used to collect the voltage of the battery pack and send it to the main control module through the SBUS bus.

[0056] The bus current detection module mainly includes a current detection sensor, which is used to collect the charge and discharge current of the battery pack and send it to the main control module through the SBUS bus.

[0057] The single battery detection module mainly includes a battery voltage detection circuit, a battery current acquisition circuit, a battery internal resistance detection circuit and a battery temperature detection circuit, which are used to collect information such as the voltage, current, internal resistance and temperature of a single battery, calculate the capacity of a single battery, analyze the health status of the battery, and evaluate the battery service life.

[0058] The battery internal resistance detection adopts the pulsating DC discharge method, which discharges the battery with a small current at a certain frequency, measures the instantaneous voltage drop and instantaneous discharge current on the battery, and then calculates the battery internal resistance through Ohm's law. The principle of the battery internal resistance detection system is as follows, which includes three parts: excitation circuit, sampling circuit and signal processing circuit. The excitation circuit controls the on and off of the discharge circuit through the MOS tube, and generates an excitation signal through the single-chip microcomputer to accurately control the switching time, thereby generating an instantaneous discharge current. The discharge circuit uses a 5Ω cement resistor, the discharge current is 0.2C-0.3C, and the discharge time is 100ms to avoid the impact of discharge on the battery and reduce heat. During the battery discharge process, the discharge current I and the battery voltage drop ΔU during discharge are obtained through the sampling circuit, and transmitted to the single-chip microcomputer for conversion through the signal processing circuit. Finally, the battery internal resistance R can be calculated by Ohm's law. T =ΔU / I.

[0059] The internal resistance of a battery is related to its temperature. The higher the temperature, the smaller the internal resistance, and the lower the temperature, the larger the internal resistance. Therefore, the calculated internal resistance of the battery needs to be converted to the standard internal resistance at 25°C. The conversion method is as follows:

[0060]

[0061] in, For temperature T The internal resistance of the battery measured at ℃; It is the equivalent internal resistance at 25℃ after temperature correction; T is the current temperature; is the temperature correction coefficient. It is obtained through experiments and adjusted by the temperature change rate and the effective heat dissipation space of the ring network cabinet. The specific process is as follows:

[0062] First, measure the standard internal resistance of the battery at 25°C R 0 ;

[0063] Measure the internal resistance of the battery at different temperatures from -25℃ to 50℃ with an interval of 5℃ ;

[0064] According to the formula Calculate the corresponding temperature The value is used as the initial temperature correction coefficient, thus obtaining and temperature T The corresponding relationship curve;

[0065] The fitting formula of the above relationship curve is obtained by binomial fitting method:

[0066]

[0067] in, a 0. b 0 and c 0 is the coefficient obtained by binomial fitting.

[0068]

[0069] in, The temperature change rate within a preset time period. The optional time period is 0.1 seconds before the current time. The effective heat dissipation space of the ring main unit, specifically the remaining space after removing all equipment from the ring main unit; and As the conversion parameter, the temperature change rate and effective heat dissipation space of the ring network cabinet Convert to The number can be accumulated, and the converted number can be digitally changed to achieve the temperature change rate and effective heat dissipation space of the ring network cabinet Integer multiple reduction.

[0070] In this embodiment, the battery capacity is detected using the current time integration method. This involves sampling the battery charge and discharge current at a high speed of 1kHz and calculating the actual battery capacity through discrete summation. Because the actual battery discharge capacity is temperature-dependent—higher temperatures increase the battery's discharge capacity, while lower temperatures decrease it—the calculation of the actual battery capacity requires correction based on the battery's temperature.

[0071]

[0072] in, SOC is the actual capacity of the battery; I is the battery current, which is positive for charging and negative for discharging; is the sampling period, K T The battery capacity correction factor at different temperatures, the battery capacity correction factor K T Obtained through capacity and temperature characteristic curves, as well as temperature change rate and effective heat dissipation space adjustment of the ring network cabinet;

[0073]

[0074]

[0075] in, is the initial value of the battery capacity correction factor before adjustment; T is the current temperature, a 1. b 1. c1 and d 1According to the capacity and temperature characteristic curve provided by the battery manufacturer, a cubic polynomial fitting method is used to obtain the following: Figure 2 As shown, The temperature change rate within a preset time period. The optional time period is 0.1 seconds before the current time. The effective heat dissipation space of the ring main unit, specifically the remaining space after removing all equipment from the ring main unit; and As the conversion parameter, the temperature change rate and effective heat dissipation space of the ring network cabinet Convert to The number can be accumulated, and the converted number can be digitally changed to achieve the temperature change rate and effective heat dissipation space of the ring network cabinet Integer multiple reduction.

[0076] Optional, such as Figure 4 As shown, the battery health status analysis method is as follows:

[0077] First, determine the working status of the battery based on the direction and size of the battery current.

[0078] If the battery is in a discharging state, first collect the battery temperature and calculate the battery capacity correction factor K T The battery voltage and discharge current are collected simultaneously, and the battery discharge capacity is calculated by current integration and corrected according to the battery temperature. The battery discharge state is determined by the battery voltage. When the battery voltage reaches the battery discharge cut-off voltage, it reaches the full discharge state. The total discharge capacity of the battery at this time is calculated as the effective capacity of the battery.

[0079] If the battery is in charging state, first collect the battery temperature and calculate the battery capacity correction factor K T The battery charging current is collected, and the battery charging capacity is calculated by current integration and corrected according to the battery temperature. When the battery current reaches the float charge current, it reaches the full charge state. The total charging capacity of the battery at this time is calculated as the effective capacity of the battery.

[0080] If the battery is in a floating charge state, the battery internal resistance is detected by the pulsating DC discharge method, the battery temperature is collected, and the temperature correction coefficient of the battery internal resistance is calculated. R T , convert the battery internal resistance into the standard internal resistance at 25℃, and estimate the battery effective capacity based on the established battery internal resistance vs capacity relationship model.

[0081] Understandably, Figure 3As shown, the internal resistance of the battery is inversely proportional to the capacity of the battery, that is, the smaller the capacity, the greater the internal resistance, and the larger the capacity, the smaller the internal resistance.

[0082] During float charge, since the current integration method cannot be used to measure the battery capacity, the battery capacity can be estimated by measuring the battery's internal resistance. Before the system is put into operation, the standard capacity and internal resistance of the battery are measured first, and the corresponding relationship is established as shown in Table 1 below.

[0083] Table 1 Correspondence between standard battery capacity and internal resistance

[0084]

[0085] During system operation, the internal resistance of the battery is first measured using the pulsating current method, and the battery internal resistance is converted into the standard internal resistance at 25°C. Then, the battery capacity is estimated based on the corresponding relationship between the battery internal resistance and capacity.

[0086] The internal resistance of a battery is related to its temperature. The higher the temperature, the smaller the internal resistance, while the lower the temperature, the larger the internal resistance. Therefore, battery internal resistances measured at different temperatures cannot be directly compared. For more accurate comparison, they must be converted to resistances at a standard temperature.

[0087] After obtaining the effective capacity of the battery by different methods in the above three states, the health status of the battery is estimated by the following method SOH .

[0088]

[0089] The battery's health status is SOH , which is defined as the ratio of the effective capacity of the battery to the nominal capacity. Therefore, the core task of the system is to calculate the effective capacity of the battery SOC In this embodiment, three conditions are provided for measuring the effective capacity of the battery. SOC Method to obtain the battery SOC After that, the battery health status can be evaluated.

[0090] like Figure 5 As shown, a battery anti-theft alarm module is set up, which includes anti-theft detection, sound and light alarms, and a surveillance camera. The anti-theft detection module includes a door opening detection module, a voltage mutation detection module, and a battery weight detection module. These detection information is uploaded to the backend system via the main control module. Images and videos from the surveillance camera are uploaded to the backend system via the 4G network.

[0091] The door opening detection module is implemented through a sensor installed on the door frame. When it detects that the ring network cabinet door is opened, the main control module will send the information that the cabinet door is opened to the background system. At the same time, the local surveillance camera will take a picture of the person opening the door and upload it to the background system.

[0092] The voltage mutation detection module is implemented by detecting the battery bus voltage. If the battery cable is cut, the battery voltage will suddenly drop to 0. At this time, the main control module will send an alarm message that the battery line is damaged to the background system. At the same time, the local sound and light alarm will start to alarm, and the local surveillance camera will start recording and save the recorded video to the server of the background system.

[0093] The battery weight detection module is implemented through a weighing sensor installed under each battery. When the battery is removed from the ring network cabinet, it is detected that the battery weight becomes 0. At this time, the main control module will send an alarm message that the battery has been stolen to the background system.

[0094] When the above events occur and the backend system receives the alarm information, it will simultaneously push an alarm reminder SMS to the administrator's mobile phone.

[0095] The battery environment temperature and humidity detection control module consists of a temperature and humidity detection sensor, a dehumidification module, a heating module, and an exhaust module. It is mainly used to provide a suitable working environment temperature and humidity for the battery storage space to improve the battery life.

[0096] The system in this embodiment is enclosed in a small sealed box together with the battery, and the temperature and humidity in the box are detected by temperature and humidity detection sensors. When the ambient humidity is higher than 70%, the dehumidification module is automatically started to keep the box dry to prevent rust and corrosion on the battery terminals. When the ambient temperature is lower than 10°C, the heating module is automatically started to keep the temperature inside the box above 10°C to prevent the battery capacity from decreasing due to the low temperature environment. When the ambient temperature is higher than 40°C, the exhaust device is automatically started to cool down to prevent the battery from bulging, expanding, leaking or even exploding due to excessive temperature.

[0097] This embodiment uses the system's anti-theft alarm detection module to detect, warn, and promptly collect evidence of battery theft, effectively preventing battery theft, reducing economic losses, and ensuring the safe operation of the power system. The system's battery environmental temperature and humidity detection and control module provides a suitable operating environment for the battery, extending its service life and ensuring safe operation.

[0098] Example 2:

[0099] This embodiment provides a ring main unit battery status monitoring system, including:

[0100] The data acquisition module is configured to: obtain the internal resistance, current and temperature of the battery in the ring network cabinet;

[0101] The first calculation module is configured to convert the internal resistance value into a standard internal resistance at room temperature using a temperature correction coefficient; wherein the temperature correction coefficient is obtained through an experiment and is adjusted based on the temperature change rate and the effective heat dissipation space of the ring main unit;

[0102] The second calculation module is configured to obtain the actual capacity of the battery through the battery capacity correction coefficient and the current; wherein the battery capacity correction coefficient is obtained by adjusting the capacity and temperature characteristic curve, the temperature change rate, and the effective heat dissipation space of the ring network cabinet;

[0103] The monitoring module is configured to monitor the battery status of the ring main unit according to the standard internal resistance and the actual capacity of the battery.

[0104] The working method of the system is the same as the ring main unit battery status monitoring method of Example 1, and will not be repeated here.

[0105] Example 3:

[0106] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the ring main unit battery status monitoring method described in Example 1 are implemented.

[0107] Example 4:

[0108] This embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor. When the processor executes the program, the steps of the ring main unit battery status monitoring method described in Example 1 are implemented.

[0109] Example 5:

[0110] This embodiment provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the ring main unit battery status monitoring method described in Example 1 are implemented.

[0111] The above description is merely a preferred embodiment of this embodiment and is not intended to limit this embodiment. Those skilled in the art will readily appreciate that this embodiment may be modified and varied in various ways. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this embodiment shall be within the scope of protection of this embodiment.

Claims

1. A method for monitoring the battery status of a ring main unit, characterized in that: include: Obtain the internal resistance, current and temperature of the battery in the ring main unit; The internal resistance value is converted into the standard internal resistance at room temperature through the preset temperature correction coefficient; The actual capacity of the battery is obtained through the battery capacity correction coefficient and current. The temperature correction coefficient is adjusted according to the temperature change rate and the effective heat dissipation space of the ring main unit. The battery capacity correction coefficient is obtained by adjusting the capacity and temperature characteristic curve, the temperature change rate and the effective heat dissipation space of the ring main unit. Monitor the battery status of the ring main unit based on the standard internal resistance and the actual capacity of the battery; Temperature correction factor for: ； ； in, a 0. b 0 and c 0 is the coefficient obtained by binomial fitting; The temperature change rate within a preset time period; It is the effective heat dissipation space of the ring main unit, which is the remaining space after removing all equipment in the ring main unit; and is the conversion parameter; is the current temperature; is the initial coefficient of temperature correction; The actual capacity of the battery is the product of the battery current, sampling period and battery capacity correction factor; Battery capacity correction factor K T for: ； ； in, is the initial value of the battery capacity correction factor before adjustment; a 1. b 1. c 1 and d 1According to the capacity and temperature characteristic curve provided by the battery manufacturer, it is obtained by using a cubic polynomial fitting method; The temperature change rate within a preset time period; Provides effective heat dissipation space for the ring network cabinet; and is the conversion parameter; The working state of the battery is determined by the direction and magnitude of the current. If the battery is in the discharge state, the battery capacity correction factor is obtained according to the temperature. The discharge capacity of the battery is calculated by integrating the current based on the battery voltage and discharge current and corrected according to the battery temperature. The discharge state of the battery is determined by the battery voltage. When the battery voltage reaches the discharge cut-off voltage, the battery reaches the full discharge state. The total discharge capacity of the battery at this time is calculated as the effective capacity of the battery. If the battery is in the charging state, the battery capacity correction factor is calculated based on the temperature. The battery charging current is used to calculate the battery charging capacity by integrating the current and correcting it according to the battery temperature. When the battery current reaches the float charge current, the battery reaches the full charge state. The total charging capacity of the battery at this time is calculated as the effective capacity of the battery. If the battery is in a floating charge state, the battery internal resistance is tested by the pulsating DC discharge method. The temperature correction coefficient of the battery internal resistance is obtained by the temperature, and the battery internal resistance is converted into the standard internal resistance at room temperature. The effective capacity of the battery is obtained based on the relationship between the standard internal resistance and capacity. According to the effective capacity in the discharge state, charge state and float charge state, the health status of the battery is obtained by the ratio of the current effective capacity to the nominal capacity of the battery.

2. A method for monitoring the battery status of a ring main unit according to claim 1, characterized in that: The standard internal resistance at room temperature is equal to the difference between the battery internal resistance measured at the current temperature and the product of the current temperature and room temperature multiplied by the temperature correction coefficient.

3. A ring main unit battery status monitoring system, characterized in that: The steps of implementing the ring main unit battery status monitoring method according to any one of claims 1 to 2 include: The data acquisition module is configured to: obtain the internal resistance, current and temperature of the battery in the ring network cabinet; The calculation module is configured to: convert the internal resistance value into a standard internal resistance at room temperature using a preset temperature correction coefficient; obtain the actual capacity of the battery using the battery capacity correction coefficient and the current; wherein the temperature correction coefficient is adjusted based on the temperature change rate and the effective heat dissipation space of the ring main unit; and the battery capacity correction coefficient is obtained by adjusting the capacity and temperature characteristic curve, the temperature change rate, and the effective heat dissipation space of the ring main unit; The monitoring module is configured to monitor the battery status of the ring main unit based on the standard internal resistance and the actual capacity of the battery; Temperature correction factor for: ； ； in, a 0. b 0 and c 0 is the coefficient obtained by binomial fitting; The temperature change rate within a preset time period; It is the effective heat dissipation space of the ring main unit, which is the remaining space after removing all equipment in the ring main unit; and is the conversion parameter; is the current temperature; is the initial temperature correction coefficient.

4. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the ring main unit battery status monitoring method according to any one of claims 1 to 2 are implemented.

5. An electronic device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that: When the processor executes the program, the steps of the ring main unit battery status monitoring method according to any one of claims 1-2 are implemented.

6. A computer program product, characterized in that The computer program product includes a computer program, and when the computer program is executed by a processor, the steps of the ring main unit battery status monitoring method according to any one of claims 1 to 2 are implemented.

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