Ring main unit battery state monitoring method and system, medium, equipment and product

Abstract

The invention belongs to the technical field of battery state monitoring, and provides a ring main unit battery state monitoring method and system, a medium, equipment and a product, an internal resistance value is converted into a standard internal resistance at room temperature through a temperature correction coefficient, and the actual capacity of a battery is obtained through a battery capacity correction coefficient and current. The battery state of the ring main unit is monitored according to the standard internal resistance and the actual capacity of the battery, the influence of the temperature on the internal resistance and the capacity is considered in the evaluation process, and the monitoring deviation is reduced; meanwhile, the temperature correction coefficient and the battery capacity correction coefficient are adjusted through the temperature change rate and the effective heat dissipation space of the ring main unit, the influence of the temperature change rate and the structural characteristics of the ring main unit on the temperature change trend and the battery state is considered, and the accuracy of judging the running state of the storage battery of the ring main unit is further improved.

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 the northern region. The operating temperature is as high as 40℃-50℃ in summer and may be lower than -10℃ in winter. In addition, the humidity changes greatly, which can easily lead to problems such as battery expansion, terminal rust and corrosion. The battery is in poor health and its service life does not meet the design requirements.

[0003] Most of the existing online monitoring systems for batteries in ring main units judge the operating status of batteries by detecting the battery voltage, current, internal resistance and capacity. However, parameters such as the internal resistance and capacity of the battery are closely related to the temperature. Most systems do not consider and correct the influence of the above factors, resulting in large deviations in the judgment results. Although some systems have taken the influence of temperature into consideration, they do not consider the influence of the temperature change rate and the structural characteristics of the ring main unit itself on the temperature change trend and the battery status, and cannot accurately judge the operating status of the batteries in the ring main unit. 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 main unit. The present invention converts the internal resistance value into the standard internal resistance at room temperature through the temperature correction coefficient, and obtains the actual capacity of the battery through the battery capacity correction coefficient and the current. Then, the battery status of the ring main unit 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 main unit, taking into account the influence of the temperature change rate and the structural characteristics of the ring main unit itself on the temperature change trend and the battery status, thereby further improving the accuracy of judging the operating status of the battery in the ring main unit.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: In a first aspect, the present invention provides a method for monitoring the battery status of a ring main unit, comprising: 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 temperature correction coefficient; wherein the temperature correction coefficient is obtained through an experimental method and is adjusted by the temperature change rate and the effective heat dissipation space of the ring network cabinet; The actual capacity of the battery is obtained through the battery capacity correction coefficient and current; wherein the battery capacity correction coefficient is obtained through the capacity and temperature characteristic curve, as well as the temperature change rate and the effective heat dissipation space of the ring network cabinet; The battery status of the ring main unit is monitored based on the standard internal resistance and the actual capacity of the battery.

[0006] Furthermore, the standard internal resistance at room temperature for: in, For temperature T The internal resistance of the battery measured at ℃; T is the current temperature; is the temperature correction factor.

[0007] Furthermore, the temperature correction factor for: in, a 0. b 0 and c 0 is the coefficient obtained by binomial fitting; is 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 the equipment in the ring main unit; and is the conversion parameter.

[0008] Furthermore, the actual capacity of the battery SOC for: in, I is the battery current; is the sampling period, K T It is the battery capacity correction factor at different temperatures.

[0009] Furthermore, the battery capacity correction factor K T for: 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 d1According to the capacity and temperature characteristic curve provided by the battery manufacturer, it is obtained by using a cubic polynomial fitting method; is the temperature change rate within a preset time period; Provide effective heat dissipation space for the ring main unit; and is the conversion parameter.

[0010] Furthermore, the working state of the battery is judged according to the direction and magnitude of the current; if the battery is in a discharging state, the temperature correction coefficient of the battery capacity is obtained according to the temperature; the discharge capacity of the battery is calculated by integrating the current through the battery voltage and the discharge current and corrected according to the battery temperature, and the discharge state of the battery is judged by the battery voltage. When the battery voltage reaches the discharge cut-off voltage of the battery, the battery reaches a full discharge state, and the total discharge capacity of the battery at this time, i.e., the effective capacity of the battery, is calculated; If the battery is in a charging state, the temperature correction coefficient of the battery capacity is calculated by the temperature; the battery charging current is calculated by current integration and corrected according to the battery temperature. When the battery current reaches the floating charge current, it reaches a full charge state, and the total charging capacity of the battery at this time is calculated, that is, the effective capacity of the battery; If the battery is in a floating charge state, the battery internal resistance is detected by the pulsating DC discharge method, and the temperature correction coefficient of the battery internal resistance is obtained by the temperature. The battery internal resistance is converted into the standard internal resistance at room temperature, and the effective capacity of the battery is obtained according to the relationship between the standard internal resistance and capacity. According to the effective capacity in the discharge state, charge state and floating 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.

[0011] In a second aspect, the present invention further provides a ring main unit battery status monitoring system, comprising: The data acquisition module is configured to: obtain the internal resistance, current and temperature of the battery in the ring network cabinet; The first calculation module is configured to: convert the internal resistance value into the standard internal resistance at room temperature through a temperature correction coefficient; wherein the temperature correction coefficient is obtained by an experiment and is adjusted by the temperature change rate and the effective heat dissipation space of the ring network cabinet; 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; 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.

[0012] 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.

[0013] In a fourth aspect, the present invention further 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 main unit battery status monitoring method described in the first aspect are implemented.

[0014] 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.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 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 judging the operating status of the battery in the ring network cabinet.

[0016] The present invention can grasp the real-time status, historical status and changing trend of the battery's voltage, current, internal resistance, capacity, temperature, etc., and provide conditions for refined management and maintenance of the battery; it realizes accurate evaluation of the battery's health status, and is convenient for timely understanding whether the remaining capacity of the battery 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

[0017] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0018] Figure 1 This is a schematic diagram of the monitoring system structure of Example 1 of the present invention; Figure 2 The capacity and temperature characteristic curve of Example 1 of the present invention; Figure 3 is the inverse relationship between the internal resistance and the capacity of Example 1 of the present invention; Figure 4 is a flow chart of the method of embodiment 1 of the present invention; Figure 5 This is the battery anti-theft alarm module of Example 1 of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] 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 meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0021] Embodiment 1: Ring main unit has been widely used in distribution stations and box-type substations in urban residential areas, high-rise buildings, large public buildings, factories and enterprises and other load centers due to its simple structure, flexible use, small size and low price. Ring main unit generally uses a small capacity lead-acid battery pack as a backup power supply. Since the ring main unit operates outdoors for a long time, the operating environment is relatively complex, especially in the northern region. The operating temperature is as high as 40℃-50℃ in summer and may be lower than -10℃ in winter. In addition, the humidity changes greatly, which can easily lead to battery expansion, terminal rust, corrosion and other problems. The battery is in poor health and its service life does not meet the design requirements.

[0022] 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 cell 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.

[0023] The background system is used to display the ambient temperature and humidity, battery voltage, current and internal resistance and other information in the ring network cabinet, generate data change curves, analyze and judge the health status of the battery, set system parameters, etc.

[0024] The data transfer unit (DTU) is connected to the background system through the network, connected to the main control module through the 485 bus, and forwards the data collected by the main control module to the background system.

[0025] 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 submodule.

[0026] The main control module is connected to each submodule via an SBUS bus. The SBUS bus is divided into two parts: a receiving circuit and a sending circuit. The circuits are isolated via an optical coupling circuit to improve the anti-interference capability.

[0027] 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.

[0028] 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.

[0029] The single-cell 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 life.

[0030] 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 the 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.

[0031] The internal resistance of the battery is related to the temperature of the battery. The higher the temperature, the smaller the internal resistance of the battery, and the lower the temperature, the larger the internal resistance of the battery. Therefore, it is necessary to convert the calculated internal resistance of the battery into the standard internal resistance at 25°C. The conversion method is as follows: 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: First, measure the standard internal resistance of the battery at 25°C R 0 ; Measure the internal resistance of the battery at different temperatures from -25℃ to 50℃ with an interval of 5℃ ; According to the formula Calculate the corresponding The value is used as the initial temperature correction coefficient, thus obtaining With temperature T The corresponding relationship curve of The fitting formula of the above relationship curve is obtained by binomial fitting method: in, a 0. b 0 and c 0 is the coefficient obtained by binomial fitting.

[0032] in, The temperature change rate within a preset time period. The optional time period is 0.1 seconds before the current time. It is 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 Effective heat dissipation space of ring main unit Convert to The number can be accumulated, and the converted number can be digitally changed to achieve the temperature change rate Effective heat dissipation space of ring main unit Integer multiple reduction.

[0033] In this embodiment, the battery capacity detection adopts the current time integration method, that is, the battery charge and discharge current is sampled at a high speed of 1kHz, and the actual capacity of the battery is calculated by discrete summation. Since the actual discharge capacity of the battery is related to the temperature, the higher the temperature, the greater the discharge capacity of the battery, and the lower the temperature, the smaller the discharge capacity, so when calculating the actual capacity of the battery, it is necessary to make corrections according to the battery temperature.

[0034] in, SOC is the actual capacity of the battery; I is the battery current, charging is positive and discharging is negative; is the sampling period, K Tis the battery capacity correction factor at different temperatures, the battery capacity correction factor K T It is obtained through the capacity and temperature characteristic curve, as well as the temperature change rate and the effective heat dissipation space adjustment of the ring network cabinet; 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, a cubic polynomial fitting method is used to obtain, such as 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. It is 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 Effective heat dissipation space of ring main unit Convert to The number can be accumulated, and the converted number can be digitally changed to achieve the temperature change rate Effective heat dissipation space of ring main unit Integer multiple reduction.

[0035] Optional, such as Figure 4 As shown, the analysis method of battery health status is as follows: First, determine the working status of the battery based on the direction and size of the battery current.

[0036] If the battery is in a discharging state, first collect the battery temperature and calculate the temperature correction coefficient of the battery capacity K T The battery voltage and discharge current are collected at the same time, the discharge capacity of the battery is calculated by current integration and corrected according to the battery temperature, the discharge state of the battery is judged by the battery voltage, and the full discharge state is reached when the battery voltage reaches the discharge cut-off voltage of the battery. The total discharge capacity of the battery at this time is calculated, that is, the effective capacity of the battery.

[0037] If the battery is in charging state, first collect the battery temperature and calculate the temperature correction coefficient of the battery capacity K TThe charging current of the battery 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 floating charge current, it reaches the full charge state. The total charging capacity of the battery at this time is calculated, that is, the effective capacity of the battery.

[0038] If the battery is in floating charge state, the battery internal resistance is detected by 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°C, and estimate the effective capacity of the battery based on the established battery internal resistance vs capacity relationship model.

[0039] Understandable, such as Figure 3 As shown, there is an inversely proportional relationship between the internal resistance of the battery and the capacity of the battery, that is, the smaller the capacity, the larger the internal resistance, and the larger the capacity, the smaller the internal resistance.

[0040] In the floating charge state, since the battery capacity cannot be measured by the current integration method, 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 first measured to establish the corresponding relationship shown in Table 1 below.

[0041] Table 1 Correspondence between standard battery capacity and internal resistance During system operation, the internal resistance of the battery is first measured by 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.

[0042] The internal resistance of the battery is related to the temperature of the battery. The higher the temperature, the smaller the internal resistance of the battery, and the lower the temperature, the larger the internal resistance of the battery. Therefore, the internal resistance of the battery measured at different temperatures cannot be directly compared. It must be converted to the resistance at the standard temperature for more accurate comparison.

[0043] 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 .

[0044] The battery 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.

[0045] like Figure 5As shown in the figure, a battery anti-theft alarm module is set up, which includes anti-theft detection, sound and light alarm and monitoring camera. The anti-theft detection includes door opening detection module, voltage mutation detection module and battery weight detection module. The above detection information is uploaded to the background system through the main control module. The images and videos of the monitoring camera are uploaded to the background system through the 4G network.

[0046] 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 monitoring camera will take a picture of the person opening the door and upload it to the background system.

[0047] The voltage mutation detection module is implemented by detecting the battery bus voltage. If the battery cable is cut, the battery voltage will suddenly change 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 monitoring camera will be started to start recording, and the recorded video will be saved to the server of the background system.

[0048] 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.

[0049] When the above events occur and the background system receives the alarm information, the background system will simultaneously push an alarm prompt SMS to the administrator's mobile phone.

[0050] 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 increase the battery life.

[0051] 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 of the battery terminals. When the ambient temperature is lower than 10°C, the heating module is automatically started to keep the temperature in 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, swelling, leaking or even exploding due to excessive temperature.

[0052] This embodiment realizes the detection, early warning and timely evidence collection of battery anti-theft through the anti-theft alarm detection module of this system, effectively avoiding battery theft, reducing economic losses and ensuring the safe operation of the power system. The battery environment temperature and humidity detection control module of this system provides a suitable working environment for the battery, prolongs the battery life and ensures the safe operation of the battery.

[0053] Embodiment 2: This embodiment provides a ring main unit battery status monitoring system, including: The data acquisition module is configured to: obtain the internal resistance, current and temperature of the battery in the ring network cabinet; The first calculation module is configured to: convert the internal resistance value into the standard internal resistance at room temperature through a temperature correction coefficient; wherein the temperature correction coefficient is obtained by an experiment and is adjusted by the temperature change rate and the effective heat dissipation space of the ring network cabinet; 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; 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.

[0054] 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.

[0055] Embodiment 3: 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 method for monitoring the battery status of a ring main unit described in Example 1 are implemented.

[0056] Embodiment 4: 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.

[0057] Embodiment 5: 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 method for monitoring the battery status of a ring main unit described in Example 1 are implemented.

[0058] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present 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 temperature correction coefficient; wherein the temperature correction coefficient is obtained through an experimental method and is adjusted by the temperature change rate and the effective heat dissipation space of the ring network cabinet; The actual capacity of the battery is obtained through the battery capacity correction coefficient and current; wherein the battery capacity correction coefficient is obtained through the capacity and temperature characteristic curve, the temperature change rate and the effective heat dissipation space of the ring network cabinet; The battery status of the ring main unit is monitored based on the standard internal resistance and the actual capacity of the battery.

2. A method for monitoring the battery status of a ring main unit according to claim 1, characterized in that: Standard internal resistance at room temperature for: in, For temperature T The internal resistance of the battery measured at ℃; T is the current temperature; is the temperature correction factor.

3. A method for monitoring the battery status of a ring main unit according to claim 2, characterized in that: Temperature correction factor for: in, a 0. b 0 and c 0 is the coefficient obtained by binomial fitting; is 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 the equipment in the ring main unit; and is the conversion parameter.

4. A method for monitoring the battery status of a ring main unit according to claim 1, characterized in that: The actual capacity SOC of the battery is: in, I is the battery current; is the sampling period, K T It is the battery capacity correction factor at different temperatures.

5. A method for monitoring the battery status of a ring main unit according to claim 1, characterized in that: Battery capacity correction factor K T for: 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; is the temperature change rate within a preset time period; Provide effective heat dissipation space for the ring main unit; and is the conversion parameter.

6. A method for monitoring the battery status of a ring main unit according to claim 4, characterized in that: The working state of the battery is determined according to the direction and magnitude of the current; if the battery is in a discharging state, the temperature correction coefficient of the battery capacity is obtained according to the temperature; the discharge capacity of the battery is calculated by integrating the current through the battery voltage and the 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 of the battery, the battery reaches a full discharge state, and the total discharge capacity of the battery at this time, i.e., the effective capacity of the battery, is calculated; If the battery is in a charging state, the temperature correction coefficient of the battery capacity is calculated by the temperature; the battery charging current is calculated by current integration and corrected according to the battery temperature. When the battery current reaches the floating charge current, it reaches a full charge state, and the total charging capacity of the battery at this time is calculated, that is, the effective capacity of the battery; If the battery is in a floating charge state, the battery internal resistance is detected by the pulsating DC discharge method, and the temperature correction coefficient of the battery internal resistance is obtained by the temperature. The battery internal resistance is converted into the standard internal resistance at room temperature, and the effective capacity of the battery is obtained according to the relationship between the standard internal resistance and capacity. According to the effective capacity in the discharge state, charge state and floating 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.

7. A ring main unit battery status monitoring system, characterized in that: include: The data acquisition module is configured to: obtain the internal resistance, current and temperature of the battery in the ring network cabinet; The first calculation module is configured to: convert the internal resistance value into the standard internal resistance at room temperature through a temperature correction coefficient; wherein the temperature correction coefficient is obtained by an experiment and is adjusted by the temperature change rate and the effective heat dissipation space of the ring network cabinet; 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; 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.

8. 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 as described in any one of claims 1 to 6 are implemented.

9. 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 as described in any one of claims 1-6 are implemented.

10. 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 6 are implemented.

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