A disposable battery replacement early warning method for a smart meter

Abstract

The application is suitable for the technical field of intelligent electric meter, and relates to a disposable battery replacement early warning method of an intelligent electric meter, which comprises the following steps: S10, a battery voltage sampling circuit is added in each intelligent electric meter in a transformer area; S20, the battery voltage sampling circuit periodically acquires relevant battery voltage sampling signals, and sends the sampling data to an electric meter communication module after each sampling is completed, and the electric meter communication module reports the sampling data to a master station; S30, the master station establishes a data storage entry for each network access electric meter in the transformer area, and analyzes relevant data, so that the current state of the disposable battery of each network access electric meter is judged; and S40, the master station provides replacement early warning information for each network access electric meter according to the judgment result in step S30. The application can remotely monitor the working state of the electric meter battery, and early warns the replacement time of the battery, so that the number of battery replacements in the use cycle of the electric meter is effectively reduced.

Description

Technical Field

[0001] This invention belongs to the field of smart meter technology, and in particular relates to a method for early warning of one-time battery replacement in smart meters. Background Technology

[0002] Smart meters are intelligent metering devices that dynamically collect data from the power grid's data processing system. They can also collect relevant customer data from this system, analyze and decompose the information using information technology, and transmit the processed data to customers and businesses. Through these processes, they can monitor customer electricity consumption throughout the entire lifespan, promptly detect leakage and power outages, and effectively control illegal electricity theft. Currently, smart meters generally use disposable, non-rechargeable batteries. However, current battery products struggle to provide stable power throughout the meter's entire lifespan, often necessitating on-site battery replacement. Existing technology often employs a periodic batch replacement mechanism, where batteries are replaced after a certain operating time or when a certain percentage of meters in a region experience battery problems. Due to various factors, the actual battery lifespan is highly variable. Overly frequent battery replacements lead to significant resource waste, while infrequent replacements can result in metering errors due to battery failure in some meters. Reducing the number of battery replacements during a meter's lifespan has become a key focus for power grid companies.

[0003] Patent CN211789354U discloses a smart meter with a quickly replaceable battery. Its structure includes a wire interface, a controller, a display screen, a mounting box, and a battery replacement port. The wire interface is embedded in the lower end face of the mounting box. The controller is located directly below the display screen, parallel to it, with its bottom face in contact with the surface of the wire interface. The display screen is located directly above the wire interface. The mounting box is mounted on the rear end face of the display screen, also parallel to it. The battery replacement port is installed and connected to the top of the mounting box, with a surface-locking connection. This patent only implements the function of a replaceable battery; it does not provide an effective technical solution for reducing the number of battery replacements during use.

[0004] Therefore, how to perform high-precision monitoring of the electricity meter during its service life to determine the status of the meter battery, replace the meter battery as needed, and reduce the number of battery replacements during the meter's service life is a problem that urgently needs to be solved by those in this technical field. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a one-time battery replacement early warning method for smart meters, thereby solving the problem of inaccurate monitoring of the battery status in existing technologies, which leads to excessive battery replacements during the meter's service life.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This invention provides a method for providing early warning of one-time battery replacement in a smart meter, comprising the following steps:

[0008] S10. Add a battery voltage sampling circuit to each smart meter in the distribution area;

[0009] S20. The battery voltage sampling circuit periodically acquires relevant battery voltage sampling signals. After each sampling is completed, the sampling data is sent to the meter communication module, and the meter communication module reports the sampling data to the main station.

[0010] S30. The main station establishes a data storage entry for each grid-connected meter in the distribution area and performs relevant data analysis to determine the current status of the disposable battery of each grid-connected meter.

[0011] S40. The main station provides replacement warning information for each connected electricity meter based on the judgment result in step S30.

[0012] Furthermore, in step S10, the battery voltage sampling circuit includes a digitally controlled switch for controlling the opening and closing of the battery voltage sampling circuit, a test resistor, and a DC voltage measuring chip for measuring the voltage of the smart meter. The digitally controlled switch is connected in series with the test resistor, the test resistor is connected in parallel with the DC voltage measuring chip, and the DC voltage measuring chip is also connected to the meter communication module.

[0013] Furthermore, in step S30, the specific algorithm for determining the current state of the disposable battery of each grid-connected meter is as follows:

[0014] In step S30, the specific algorithm for determining the current state of the disposable battery of each grid-connected electricity meter is as follows:

[0015] S301. Suppose that the sampling period of the battery voltage data of the smart meter is T days, the sampling time is λ seconds, the sampling rate is s samples / second, and the meter has completed the reporting of battery voltage sampling data K times.

[0016] S302. Sort and merge all reported battery voltage data according to time sequence, denoted as X = [x1, x2, ..., x RR = Kλs, x is the battery voltage data of a single meter. The sampling signal is denoised using median filtering. The coefficient length of the median filter h is set to 100, and the coefficient value is a sequence of all 1 / 100.

[0017] S303, the data sequence after median filtering is denoted as... Among the symbols This represents the convolution calculation of two sequences, where y is the filtered battery voltage data after a single meter reading. The data sequence Y is uniformly segmented, with the number of segments being... Among the symbols This is the floor function;

[0018] S304, Let the segmented signal be denoted as... Calculate the mean of each of the L segmented sub-signals, and denote the resulting mean sequence as Z = [z1, z2, ..., z]. L ], z is a segmented sub-signal.

[0019] S305. Let the minimum voltage required for the battery to maintain normal operation of the smart meter be V. min A specific judgment mechanism is obtained based on the mean sequence.

[0020] Furthermore, in step S305, the specific judgment mechanism is as follows:

[0021]

[0022] Where Δ represents the discrimination result.

[0023] Furthermore, if the battery's weekly average supply voltage is less than the stated V for four consecutive weeks... min If it is 1.05 times that of the battery, a battery warning message will be provided;

[0024] If the battery's average weekly supply voltage is less than the stated V for four consecutive weeks min If the battery's operating time is less than 104 cycles, and the battery's operating time is 1.05 times that of the battery, then a battery malfunction information will be provided.

[0025] If the battery's average weekly supply voltage is less than the stated V for four consecutive weeks min 1.03 times, or the weekly average supply voltage for two consecutive weeks is less than the stated V. min If an Err-04 alarm appears on the meter, a battery warning or battery abnormality information will be provided.

[0026] Furthermore, in other cases, it indicates that the battery power supply capability is normal, providing information that the battery is functioning correctly.

[0027] Furthermore, a battery warning message indicates that the battery's power supply capacity is near the warning threshold and the battery needs to be replaced; a battery abnormality message indicates that an unexpected factor has caused the battery's lifespan to be far below the battery's design lifespan, and the battery's power supply abnormality needs to be investigated; a battery normal message indicates that the battery does not need to be replaced.

[0028] Furthermore, the typical value of the sampling period of the battery voltage sampling circuit is 1 day, the typical value of the sampling time is 5 seconds, and the typical value of the data sampling rate is 100 samples / second.

[0029] Furthermore, the typical value of the test resistor is 180 kiloohms.

[0030] Furthermore, the type of the test resistor is a low-temperature drift resistor.

[0031] The method for providing early warning of one-time battery replacement for smart meters provided by this invention has at least the following advantages compared with the prior art:

[0032] This invention introduces a battery voltage sampling circuit into the smart meter to periodically collect battery voltage data and report it to the main station. The main station analyzes the sampled data and provides relevant battery replacement warning information. This invention can remotely monitor the working status of the meter battery and provide early warnings about battery replacement time, providing accurate references for staff to replace batteries. This enables the full utilization of disposable battery power and on-demand replacement, minimizing the number of battery replacements during the meter's service life and effectively reducing the equipment operation and maintenance costs of the power grid company. Attached Figure Description

[0033] To more clearly illustrate the solutions of the present invention, a brief introduction will be given to the drawings used in the description of the embodiments below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 A flowchart illustrating a method for providing early warning of disposable battery replacement in a smart meter, as provided in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the battery voltage sampling circuit added to a one-time battery replacement early warning method for a smart meter provided in an embodiment of the present invention;

[0036] Figure 3 This is a voltage curve during the discharge process of a disposable battery.

[0037] Figure 4 This is a schematic diagram showing the life extension time of 115 decommissioned electricity meter batteries in an embodiment of the present invention.

[0038] Figure 5 This is a schematic diagram showing the remaining power percentage of the 115 decommissioned electricity meter batteries in an embodiment of the present invention.

[0039] Figure 6 This is a schematic diagram showing the remaining power percentage of the 223 batteries in the non-deactivated electricity meters in this embodiment of the invention.

[0040] Figure reference numerals: 10-Battery voltage sampling circuit; 101-CNC switch; 102-Test resistor; 103-DC voltage measurement chip; 20-Meter battery; 30-Meter load; 40-Meter communication module. Detailed Implementation

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as “length,” “width,” “upper,” “lower,” “left,” “right,” “front,” “rear,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” indicate orientations or positions based on the orientations or positions shown in the accompanying drawings and are for ease of description only, and should not be construed as limiting the technical solution.

[0042] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion; the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order. In the specification, claims, and accompanying drawings of this invention, when an element is referred to as "fixed to," "mounted to," "disposed of," or "connected to" another element, it may be directly or indirectly located on that other element. For example, when an element is referred to as "connected to" another element, it may be directly or indirectly connected to that other element.

[0043] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] This invention provides a method for early warning of one-time battery replacement in smart meters, applied to the replacement process of one-time non-rechargeable batteries in smart meters in power distribution networks. The method includes the following steps:

[0045] S10. Add a battery voltage sampling circuit to each smart meter in the distribution area;

[0046] S20. The battery voltage sampling circuit periodically acquires relevant battery voltage sampling signals. After each sampling is completed, the sampling data is sent to the meter communication module, and the meter communication module reports the sampling data to the main station.

[0047] S30. The main station establishes a data storage entry for each grid-connected meter in the distribution area and performs relevant data analysis to determine the current status of the disposable battery of each grid-connected meter.

[0048] S40. The main station provides replacement warning information for each connected electricity meter based on the judgment result in step S30.

[0049] This invention can remotely monitor the working status of the meter battery and provide early warnings about battery replacement time, providing accurate references for staff to replace batteries. This enables the full utilization of the disposable battery power and allows for replacement as needed, minimizing the number of battery replacements within the meter's lifespan and effectively reducing the equipment operation and maintenance costs for power grid companies.

[0050] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0051] This invention provides a method for early warning of disposable battery replacement in smart meters, applied to the replacement process of disposable non-rechargeable batteries in smart meters in power distribution networks, combined with... Figure 1 and Figure 2 The method for providing a one-time battery replacement warning for the smart meter includes the following steps:

[0052] S10. Add a battery voltage sampling circuit 10 to each smart meter in the distribution area;

[0053] Specifically, the battery voltage sampling circuit 10 includes a digital control switch 101 for controlling the opening and closing of the battery voltage sampling circuit 10, a test resistor 102, and a DC voltage measuring chip 103 for measuring the voltage of the smart meter. The digital control switch 101 is connected in series with the test resistor 102, and the test resistor 102 is connected in parallel with the DC voltage measuring chip 103. The DC voltage measuring chip 103 is also connected to the meter communication module 40. The circuit inside the smart meter also includes the meter battery 20 and the meter load 30.

[0054] In this embodiment, in order to minimize the loss of battery power caused by the battery voltage sampling circuit 10, the battery voltage sampling circuit 10 only performs short-term sampling periodically. The typical value of the sampling period of the battery voltage sampling circuit 10 is 1 day, the typical value of the sampling time is 5 seconds, and the typical value of the data sampling rate is 100 samples / second.

[0055] In this embodiment, to minimize the power loss of the battery voltage sampling circuit 10, a test resistor 102 with a relatively large resistance value is used in the battery voltage sampling circuit 10. Since 20uA is the current required for the smart meter to maintain low power consumption operation in the power-off state, and the required standard battery voltage is 3.6 volts, a test resistor 102 with a typical value of 180 kΩ is selected. In addition, to ensure the convergence of the battery voltage sampling circuit under different temperatures, a low-temperature drift resistor is selected for the test resistor 102, that is, a resistor with strong resistance value stability within the operating temperature range of the smart meter. Low-temperature drift resistors are relatively inexpensive, and since the standard operating voltage of the clock battery in domestic electricity meters is 3.6 volts, its value fluctuates within a small range of about 2 volts. The sampling rate requirement is also very low, and the sampling accuracy only needs to reach 0.01 volts. Therefore, the DC voltage measurement chip in the relevant circuit can be implemented using low-voltage technology, which is less costly and technically challenging. As a result, the hardware cost of the newly introduced battery voltage sampling circuit accounts for a very small percentage of the overall cost of the electricity meter. Compared with the uninterrupted long-term operation mechanism of the electricity meter clock circuit, the operating time of the sampling circuit accounts for a very small percentage, and its power is comparable to that of the clock circuit. Therefore, the impact of the introduction of the battery voltage sampling circuit on the battery's operating time is almost negligible.

[0056] S20, the battery voltage sampling circuit 10 periodically acquires relevant battery voltage sampling signals, and after each sampling is completed, it sends the sampling data to the meter communication module 40, and the meter communication module 40 reports the sampling data to the main station.

[0057] Specifically, the meter communication module 40 uses the communication network of the meter electricity consumption information collection system to report the sampled data to the main station of the distribution network.

[0058] S30. The main station establishes a data storage entry for each grid-connected meter in the distribution area and performs relevant data analysis to determine the current status of the disposable battery of each grid-connected meter.

[0059] Specifically, the main station's integrated meter management system establishes a data storage entry for each connected meter within its jurisdiction, storing the battery voltage sampling data reported by the meter and performing related data analysis to determine the current state of the disposable non-rechargeable battery in the meter. The specific algorithm is as follows:

[0060] S301. Suppose that the sampling period of the battery voltage data of the smart meter is T days, the sampling time is λ seconds, the sampling rate is s samples / second, and the meter has completed the reporting of battery voltage sampling data K times.

[0061] S302. Sort and merge all reported battery voltage data according to time sequence, denoted as X = [x1, x2, ..., x R R = Kλs, x is the battery voltage data of a single meter. Theoretically, the battery voltage sampling signal is a DC signal, but due to many factors, the sampling signal will be subject to a certain degree of noise interference. Therefore, median filtering is used to denoise the sampling signal. The coefficient length of the median filter h is set to 100, and the coefficient value is a full 1 / 100 sequence.

[0062] S303, the data sequence after median filtering is denoted as... Among the symbols This represents the convolution calculation of two sequences, where y is the filtered battery voltage data after a single meter reading. The data sequence Y is uniformly segmented, with the number of segments being... Among the symbols For the floor function, the physical meaning of the number 7 is that a week contains 7 days;

[0063] S304, Let the segmented signal be denoted as... Calculate the mean of each of the L segmented sub-signals, and denote the resulting mean sequence as Z = [z1, z2, ..., z]. L ], z is a segmented sub-signal, and the physical meaning of the mean sequence is to represent the average power supply voltage of the battery per week after the smart meter is connected to the network.

[0064] Specifically, such as Figure 3 As shown, the voltage curve of a primary battery during the entire discharge process can be divided into three stages:

[0065] Phase 1: In the initial stage, the battery terminal voltage drops rapidly. The higher the discharge rate, the faster the voltage drops.

[0066] Phase 2: The battery voltage enters a phase of slow change, which is called the plateau region of the battery. The lower the discharge rate, the longer the plateau region lasts, the higher the plateau voltage, and the slower the voltage drop.

[0067] Stage 3: When the battery is nearly depleted, the battery load voltage begins to drop sharply until it reaches the discharge cutoff voltage.

[0068] During the discharge process of the disposable battery, as the battery charge decreases, the battery output voltage also decreases. When the output voltage is lower than the minimum voltage required to maintain the normal operation of the meter, although the battery still has a small amount of charge, it is no longer sufficient to support the accuracy of the meter's clock and other related functions. At this time, the battery needs to be replaced in time.

[0069] S305. Let the minimum voltage required for the battery to maintain normal operation of the smart meter be V. min , combined Figure 3 A specific judgment mechanism is derived based on the mean sequence. The specific judgment mechanism is as follows:

[0070]

[0071] Where Δ represents the discrimination result.

[0072] S40. The main station provides replacement warning information for each connected electricity meter based on the judgment result in step S30.

[0073] Specifically, if the battery's average weekly supply voltage is lower than the minimum voltage V required for the meter to operate normally for four consecutive weeks... min If the battery capacity is 1.05 times that of the standard battery, it indicates that the usable power of the disposable battery is running low. Therefore, a battery warning is sent to the power grid management system, indicating that the battery's power supply capacity is near the warning line. This information will require power grid staff to arrange a work plan and go to the site to replace the meter battery in the near future.

[0074] If the battery's average weekly supply voltage is lower than the minimum voltage required for the meter to operate normally for four consecutive weeks... min If the battery life is less than 1.05 times the designed lifespan of the meter and the battery's operating time is less than 104 cycles (approximately 2 years), a battery anomaly information will be provided to the power grid management system. This information indicates that an unexpected factor has caused the battery's lifespan to be far below the product's designed lifespan. This information will require the power grid department to dispatch professionals to the site as soon as possible to replace the meter's battery and investigate the cause of the abnormal power supply, including but not limited to whether there are problems with the battery's operating environment, whether the battery is defective, or whether there are flaws in the meter's circuitry causing the battery to drain too quickly.

[0075] If the battery's average weekly supply voltage is lower than the minimum voltage required for the meter to operate normally for four consecutive weeks... min 1.03 times, or the weekly average supply voltage for two consecutive weeks is less than the minimum voltage value V required for the meter to operate normally. min If an Err-04 alarm appears on the meter, it indicates that the battery's power supply is about to fail or has already failed. This provides a battery warning or abnormal battery information, requesting the power grid department to send personnel to the site as soon as possible to replace the meter's battery.

[0076] In other cases, it is assumed that the battery can still provide power normally for a relatively long period of time, maintaining the accurate operation of the relevant functions of the meter. Therefore, the battery is provided to the power grid management system with normal battery information, without the need for any manual intervention.

[0077] To verify the practical application effect of the one-time battery replacement early warning method for smart meters provided in this embodiment of the invention, the experimenters obtained a batch of scrapped batteries from the power grid company that had been replaced in the field distribution area. They then visually selected 348 batteries of the same model with good appearance and installed them one by one in the meter test network. The battery voltage sampling circuit in this embodiment of the invention was installed in all the smart meters in the test network.

[0078] The meter testing network operates using the same rules as the field distribution areas during testing. When a meter reports a battery warning (no 'abnormal' results occur during the judgment process due to the use of older batteries), the testers check the current clock status of the meter. If the status is normal, the battery's lifespan is considered to have been successfully extended for a period of time; otherwise, the battery's lifespan extension is considered a failure. After completing the relevant checks, the extended battery lifespan is recorded, the meter is removed from the testing network, and the corresponding battery is sent to the laboratory for destructive testing to determine its remaining charge. The testing process lasted 12 months, during which a total of 115 meters were removed from the testing network. Inspection revealed that the clock status of these meters was normal upon removal, and the lifespan extension of these meters was as follows: Figure 4 As shown.

[0079] Testing revealed the following percentages of remaining battery capacity in these meters relative to the manufacturer's stated battery capacity: Figure 5 As shown.

[0080] After the test, the testers checked the clock status of the remaining 233 meters that had not been disconnected from the test network. None of these meters showed any clock malfunctions. The batteries of these meters were tested, and the percentage of remaining charge relative to their manufacturer's standard value was as follows: Figure 6 As shown.

[0081] As mentioned above, although these test batteries were from the same manufacturer and batch, with almost identical start times and deployed in the same area, their operating environments still differed. These differences included variations in temperature and humidity between outdoor and indoor environments, differences in battery power consumption between different meters, and differences in power supply performance between batteries. These factors combined resulted in significant differences in the effective power supply time of different batteries. When power grid management departments discover battery failures in a certain percentage of meters within an area, even if the percentage is low, they typically organize the replacement of all meter batteries in the entire area to prevent further metering errors, leading to substantial resource waste and labor costs. Figures 4 to 6 The test results show that the remaining power of these replaced batteries is still sufficient to support the normal operation of the meter for a considerable period of time. This invention introduces a battery voltage sampling circuit into the smart meter to periodically collect battery voltage data and report it to the main station. The main station analyzes the sampled data and ultimately provides relevant battery replacement warning information. This invention can remotely monitor the working status of the meter battery and provide warnings about battery replacement time, providing accurate references for staff to replace batteries. This enables the full utilization of the disposable battery power and replacement as needed, minimizing the number of battery replacements within the meter's service life and effectively reducing the equipment operation and maintenance costs of the power grid company.

[0082] Obviously, the embodiments described above are merely preferred embodiments of the present invention, and not all embodiments. The accompanying drawings illustrate preferred embodiments of the present invention, but do not limit the scope of the patent. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this invention.

Claims

1. A method for providing early warning of disposable battery replacement in a smart meter, characterized in that, Includes the following steps: S10. Add a battery voltage sampling circuit to each smart meter in the distribution area; S20. The battery voltage sampling circuit periodically acquires relevant battery voltage sampling signals. After each sampling is completed, the sampling data is sent to the meter communication module, and the meter communication module reports the sampling data to the main station. S30. The main station establishes a data storage entry for each grid-connected meter in the distribution area and performs relevant data analysis to determine the current status of the disposable battery of each grid-connected meter. In step S30, the specific algorithm for determining the current state of the disposable battery of each grid-connected electricity meter is as follows: S301. Assume the sampling period for the battery voltage data of the smart meter is... Each sampling time is [number] days. seconds, sampling rate Samples per second, and the meter has already completed the process. Reporting of battery voltage sampling data; S302. Sort and merge all reported battery voltage data according to time sequence, denoted as... Let x represent the battery voltage data of a single electricity meter. Median filtering is used to denoise the sampled signal. The median filter... The coefficient length is set to 100, and the coefficient value is a sequence of all 1 / 100. S303, the data sequence after median filtering is denoted as... , where the symbol This represents the convolution calculation of two sequences, where y is the filtered battery voltage data after a single meter reading. (This refers to the data sequence...) Perform uniform segmentation, with the number of segments being: , where the symbol This is the floor function; S304, Let the segmented signal be denoted as... Calculate these respectively The mean sequence of the segmented sub-signals is denoted as . z is a segmented sub-signal; S305. Let the minimum voltage required for the battery to maintain normal operation of the smart meter be... A specific judgment mechanism is derived based on the mean sequence; S40. The main station provides replacement warning information for each connected electricity meter based on the judgment result in step S30.

2. The method for providing early warning of disposable battery replacement in a smart meter according to claim 1, characterized in that, In step S10, the battery voltage sampling circuit includes a digitally controlled switch for controlling the opening and closing of the battery voltage sampling circuit, a test resistor, and a DC voltage measuring chip for measuring the voltage of the smart meter. The digitally controlled switch is connected in series with the test resistor, the test resistor is connected in parallel with the DC voltage measuring chip, and the DC voltage measuring chip is also connected to the meter communication module.

3. The method for providing early warning of disposable battery replacement in a smart meter according to claim 1, characterized in that, In step S305, the specific judgment mechanism is as follows: ， Where Δ represents the discrimination result.

4. The method for providing early warning of disposable battery replacement in a smart meter according to claim 3, characterized in that, If the battery's weekly average supply voltage is less than the specified value for four consecutive weeks... If the value is 1.05 times higher, a battery warning message will be provided; If the battery's weekly average supply voltage is less than the specified value for four consecutive weeks... If the battery's operating time is less than 104 cycles, and the battery's operating time is 1.05 times that of the battery, then a battery malfunction information will be provided. If the battery's weekly average supply voltage is less than the specified value for four consecutive weeks... 1.03 times, or the weekly average supply voltage for two consecutive weeks is less than the stated value. If an Err-04 alarm appears on the meter, a battery warning or battery abnormality information will be provided.

5. A method for providing early warning of disposable battery replacement in a smart meter according to claim 4, characterized in that, Otherwise, it indicates that the battery power supply is normal, providing normal battery information.

6. A method for providing early warning of disposable battery replacement in a smart meter according to claim 5, characterized in that, A battery warning message indicates that the battery's power supply capacity is near the warning threshold and the battery needs to be replaced; a battery abnormality message indicates that an unexpected factor has caused the battery's lifespan to be far below the battery's design lifespan, and the battery's power supply abnormality needs to be investigated; a battery normal message indicates that the battery does not need to be replaced.

7. A method for providing early warning of disposable battery replacement in a smart meter according to claim 1, characterized in that, The typical value of the sampling period of the battery voltage sampling circuit is 1 day, the typical value of the sampling time is 5 seconds, and the typical value of the data sampling rate is 100 samples / second.

8. A method for providing early warning of disposable battery replacement in a smart meter according to claim 2, characterized in that, The typical value of the test resistor is 180 kiloohms.

9. A method for providing early warning of disposable battery replacement in a smart meter according to claim 8, characterized in that, The type of test resistor is a low-temperature drift resistor.

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