Novel smart energy meter, charging system, and charging management method

Abstract

The invention discloses a novel intelligent electric energy meter, a charging system and a charging management method, the novel intelligent electric energy meter comprises an electric energy meter main body, and the electric energy meter main body comprises an MCU, a metering chip, a power input end, a power output end, a communication unit, a CP / PP module and a high-frequency sampling module; the communication unit is configured to establish communication connection with an electric vehicle charging management server; the CP / PP module comprises a CP terminal and a PP terminal; the CP terminal is configured to be used for outputting a PWM signal to realize a charging control function; the PP terminal is configured to be used for detecting the state and the current capacity of the charging pile; the power output end comprises a power output terminal, and the power output terminal, the CP terminal and the PP terminal form a charging terminal group with a charging function; the high-frequency sampling module is configured to perform high-frequency sampling on charging voltage and current. Therefore, the intelligent electric energy meter which is highly integrated, intelligent and low in cost and integrates the charging pile function is obtained, and efficient electric vehicle charging management and service can be better achieved.

Description

(19) State Intellectual Property Office (12) Invention Patent Application (10) Application Publication Number (43) Application Publication Date (21) Application Number 202610109844.2 (22) Application Date 2026.01.27 (71) Applicant Huizhi Instrument Co., Ltd. Address Room 1105, 11 / F, Hsieh Li Industrial Building, 49-51 Au Pui Wan Street, Fo Tan, Sha Tin, New Territories, Hong Kong, China (72) Inventors Lin Zhilin, Zhou Xiaofeng, Nishikawa Hiroki (74) Patent Agency Xiamen Xinhua Patent & Trademark Agency Co., Ltd. 35203 Patent Attorney Fan Xiaoyan, Xu Xunfu (51) Int.Cl. G01R 22 / 10 (2006.01) B60L 53 / 16 (2019.01) B60L 53 / 18 (2019.01) B60L 53 / 68 (2019.01) (54) Invention Title: Novel Smart Energy Meter, Charging System, and Charging Management Method (57) Abstract: This invention discloses a novel smart energy meter, charging system, and charging management method. The novel smart energy meter includes a main body, which comprises an MCU, a metering chip, a power input terminal, a power output terminal, a communication unit, a CP / PP module, and a high-frequency sampling module. The communication unit is configured to establish a communication connection with an electric vehicle charging management server. The CP / PP module includes a CP terminal and a PP terminal. The CP terminal is configured to output a PWM signal to achieve charging control function. The PP terminal is configured to detect the status and current capacity of the charging pile. The power output terminal includes a power output terminal, which, together with the CP terminal and the PP terminal, constitutes a charging terminal group with charging function. The high-frequency sampling module is configured to perform high-frequency sampling of charging voltage and current. Thus, a highly integrated, intelligent, and low-cost smart energy meter with integrated charging pile function is obtained, which is conducive to better realizing efficient electric vehicle charging management and service. Claims (2 pages), Description (7 pages), Drawings (7 pages), CN 121784364 A, 2026.04.03, CN 1 21 78 43 64 A. 1. A novel smart energy meter, comprising an energy meter body, the energy meter body including an MCU, a metering chip, a power input terminal, and a power output terminal; the metering chip is connected between the power input terminal and the MCU, and the power output terminal is connected to the MCU, characterized in that the energy meter body further includes a communication unit, a CP / PP module, and a high-frequency sampling module; the communication unit is connected to the MCU and configured to establish a communication connection with an electric vehicle charging management server; the CP / PP module is connected to the MCU, and the CP / PP module includes a CP terminal and a PP terminal; the CP terminal is configured to output a PWM signal to realize a charging control function; the PP terminal is configured to detect the status of the charging pile and the power supply.The power output terminal includes a power output terminal, which, together with the CP terminal and the PP terminal, constitutes a charging terminal group with charging function; the high-frequency sampling module is connected between the power input terminal and the MCU, and is configured to perform high-frequency sampling of charging voltage and current. 2. The novel smart energy meter according to claim 1, wherein the energy meter body further includes an RS485 module, which is connected to the MCU and is configured to support communication connection with external devices. 3. The novel smart energy meter according to claim 1, wherein the energy meter body further includes a relay module, which is connected between the MCU and the power output terminal and is configured to control the on / off state of the circuit according to the received command. 4. The novel smart energy meter according to claim 1, wherein the energy meter body further includes a display screen and a real-time clock, which are respectively connected to the MCU. 5. The novel smart energy meter according to claim 1, wherein the communication unit includes any one or more of a Wi-SUN communication module, a Wi-Fi communication module, an LTE communication module, and a LAN communication module. 6. The novel smart energy meter according to claim 1, characterized in that the CP / PP module further includes a CAN transceiver chip configured for communication with the vehicle based on a CAN bus; the CAN transceiver chip is connected to the MCU; the energy meter body is equipped with an automatic switching mechanism, wherein when the connected vehicle is detected to support advanced communication, the CP terminal and PP terminal serve as channels for CAN signal transmission to establish a CAN bus communication connection with the vehicle supporting advanced communication; otherwise, the traditional CP / PP control mode is maintained. 7. A charging system, characterized in that it includes the novel smart energy meter according to any one of claims 1 to 6, and further includes a charging plug compatible with electric vehicles, one end of the charging plug being a plug end and the other end being a cable end, the cable end including a charging detection control line and a charging power line, the charging detection control line being connected to the novel smart energy meter through the PP terminal and the CP terminal, and the charging power line being connected to the novel smart energy meter through the power output terminal. 8. The charging system according to claim 7, characterized in that the energy meter body is installed inside a waterproof power box. 9. The charging system according to claim 8, characterized in that the power input terminal is connected to a circuit breaker and / or a power protection device, and is installed together with the main body of the energy meter in the waterproof power box. 10. A charging management method, characterized in that it is based on the charging system according to any one of claims 7 to 9, the method comprising the following measures: (a) The novel smart energy meter establishes a communication connection with the electric vehicle charging management server through a communication unit, and receives...(a) Remote control command; (b) The new smart energy meter outputs a PWM signal through the CP terminal to control the charging current and voltage; Claims 1 / 2 page 2 CN 121784364 A (d) The new smart energy meter detects the status and current capacity of the charging pile through the PP terminal to ensure the safety of the charging process; (e) The new smart energy meter collects charging voltage and current data in real time through a high-frequency sampling module, analyzes the high-frequency sampling waveform to identify abnormal states and issue warnings or suspend charging; (f) The new smart energy meter provides a billing mode based on electricity consumption and time, and displays the accumulated electricity consumption, charging time, and communication status through a display screen. Claims 2 / 2 page 3 CN 121784364 A New smart energy meter, charging system and charging management method Technical Field

[0001] This invention relates to the field of energy meter technology, and in particular to a new smart energy meter, charging system and charging management method, which is mainly used to provide efficient, intelligent and safe charging solutions for electric vehicles. Background Technology

[0002] With the global energy structure transitioning to cleaner energy, the application of electric vehicles (EVs) is becoming more and more widespread. In traditional electric vehicle charging systems, the electricity meter and the charging pile are separate devices, resulting in high system costs, complex installation, and difficult maintenance.

[0003] A few systems integrate the electricity meter into the charging pile, for example: CN 119986074 A rail-mounted electricity meter with data acquisition function, which includes an electricity meter body and a rail installed inside the charging pile body. The electricity meter body includes an MCU system integrated chip, which is connected to an indicator light, CAN communication, an IoT module, and a communication module. It can collect data from ordinary electricity meters and communicate with the charging pile body.

[0004] Whether it is a charging pile with the electricity meter separate from the charging pile or the above-mentioned charging pile with the electricity meter installed inside the charging pile, both have the problem of high price and limited functionality, making it difficult to meet users' needs for efficient, intelligent, and low-cost charging equipment. In addition, existing equipment has shortcomings in terms of communication methods or protocol support, metering accuracy, linkage with solar power generation systems, and interaction with the power grid.

[0005] Therefore, there is an urgent need for a highly integrated, intelligent, and low-cost solution to achieve efficient electric vehicle charging management and services. Summary of the Invention

[0006] In view of this, the present invention addresses the shortcomings of existing technologies, and its main objective is to provide a novel smart energy meter, charging system, and charging management method. This system integrates power metering, charging control, high-frequency waveform sampling, and communication functions, resulting in a highly integrated, intelligent, and low-cost smart energy meter with integrated charging pile functions. This provides electric vehicle users with an efficient, intelligent, and safe charging solution, facilitating better efficient electric vehicle charging management and services.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A novel smart energy meter includes an energy meter body, which includes an MCU, a metering chip, a power input terminal, and a power output terminal; the metering chip is connected between the power input terminal and the MCU, and the power output terminal is connected to the MCU; the energy meter body further includes a communication unit, a CP / PP module, and a high-frequency sampling module; the communication unit is connected to the MCU and is configured to establish a communication connection with an electric vehicle charging management server; the CP / PP module is connected to the MCU and includes a CP terminal and a PP terminal; the CP terminal is configured to output a PWM signal to realize a charging control function; the PP terminal is configured to detect the status and current capacity of the charging pile; the power output terminal includes a power output terminal, which, together with the CP terminal and the PP terminal, constitutes a charging terminal group with charging function; the high-frequency sampling module is connected between the power input terminal and the MCU and is configured to perform high-frequency sampling of the charging voltage and current. Instruction Manual Page 1 / 7 4 CN 121784364 A

[0008] As a preferred embodiment, the main body of the energy meter further includes an RS485 module, which is connected to the MCU and configured to support communication connection with external devices.

[0009] As a preferred embodiment, the main body of the energy meter further includes a relay module, which is connected between the MCU and the power output terminal and configured to control the on / off state of the circuit according to the received command.

[0010] As a preferred embodiment, the main body of the energy meter further includes a display screen and a real-time clock, which are respectively connected to the MCU.

[0011] As a preferred embodiment, the communication unit includes any one or more of a Wi-SUN communication module, a Wi-Fi communication module, an LTE communication module, and a LAN communication module.

[0012] As a preferred embodiment, the CP / PP module further includes a CAN transceiver chip configured for communication with the vehicle based on a CAN bus; the CAN transceiver chip is connected to the MCU; the energy meter body is equipped with an automatic switching mechanism, when it detects that the connected vehicle supports advanced communication, the CP terminal and PP terminal serve as channels for CAN signal transmission to establish a CAN bus communication connection with the vehicle supporting advanced communication; otherwise, the traditional CP / PP control mode is maintained. A charging system includes a novel smart energy meter as described in any of the preceding claims, and further includes a charging plug compatible with electric vehicles, one end of the charging plug being a plug end and the other end being a cable end, the cable end including a charging detection control line and a charging power line, the charging detection control line being connected to the MCU via the PP terminal and the CP terminal.A novel smart energy meter, wherein the charging power cord is connected to the novel smart energy meter via the power output terminal.

[0013] As a preferred embodiment, the energy meter body is installed inside a waterproof power box.

[0014] As a preferred embodiment, the power input terminal is connected to a circuit breaker and / or a power protection device, and is installed together with the energy meter body inside the waterproof power box.

[0015] A charging management method, based on the charging system described in any of the preceding claims, the method comprising the following measures: (a) a novel smart energy meter establishes a communication connection with an electric vehicle charging management server through a communication unit and receives remote control commands; (b) the novel smart energy meter outputs a PWM signal through a CP terminal to control the charging current and voltage; (d) the novel smart energy meter detects the status and current capacity of the charging pile through a PP terminal to ensure the safety of the charging process; (e) the novel smart energy meter collects charging voltage and current data in real time through a high-frequency sampling module, analyzes the high-frequency sampling waveform to identify abnormal states and issue warnings or suspend charging; (f) the novel smart energy meter provides a billing mode based on electricity consumption and time, and displays the accumulated electricity consumption, charging duration, and communication status through a display screen.

[0016] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly designs the main body of the energy meter to also include a communication unit, a CP / PP module, and a high-frequency sampling module; the communication unit is connected to the MCU and is configured to establish a communication connection with the electric vehicle charging management server; the CP / PP module is connected to the MCU and includes a CP terminal and a PP terminal; the CP terminal is configured to output a PWM signal to realize the charging control function; the PP terminal is configured to detect the status and current capacity of the charging pile; the power output terminal includes a power output terminal, which together with the CP terminal and the PP terminal constitutes a charging terminal group with charging function; the high-frequency sampling module is connected between the power input terminal and the MCU and is configured to perform high-frequency sampling of the charging voltage and current. In this way, it integrates power metering, charging control, high-frequency waveform sampling and communication functions, and obtains a highly integrated, intelligent, low-cost smart energy meter with integrated charging pile function. Providing car users with efficient, intelligent, and safe charging solutions is beneficial for better achieving efficient electric vehicle charging management and services.

[0017] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Brief Description of the Drawings

[0018] Figure 1 is a perspective view of a novel smart energy meter according to an embodiment of the present invention;Figure 2 is another perspective view of the novel smart energy meter according to an embodiment of the present invention; Figure 3 is an exploded view of the novel smart energy meter according to an embodiment of the present invention (terminal cover removed); Figure 4 is a detailed functional block diagram of the novel smart energy meter according to an embodiment of the present invention; Figure 5 is an overall framework view of the novel smart energy meter according to an embodiment of the present invention applied to a charging system; Figure 6 is a detailed functional block diagram of the CP / PP module of the novel smart energy meter according to an embodiment of the present invention (showing its connection relationship with the MCU); Figure 7 is a block diagram of the CAN bus communication module between the smart energy meter and the electric vehicle based on the CP / PP terminal according to an embodiment of the present invention; Figure 8 is a flowchart of the automatic switching mechanism when the smart energy meter charges the electric vehicle according to an embodiment of the present invention (showing the automatic switching charging method); Figure 9 is an interactive diagram of the communication between the smart energy meter and multiple systems of the electric vehicle according to an embodiment of the present invention. Detailed Embodiments

[0019] Please refer to Figures 1 to 9, which show the specific solutions of embodiments of the present invention.

[0020] A novel smart energy meter integrates charging pile functions onto the energy meter and is suitable for DC or AC charging applications. It includes an energy meter body 100, which comprises an MCU, a metering chip, a power input terminal 17, and a power output terminal. The metering chip is connected between the power input terminal and the MCU, and the power output terminal is connected to the MCU. Further, the energy meter body 100 also includes a communication unit (supporting wired or wireless communication), a CP / PP module 101, and a high-frequency sampling module, integrating power metering, charging control, high-frequency waveform sampling, and communication functions into one unit. It supports DC or AC power metering to control the start and stop of charging.

[0021] The communication unit is connected to the MCU and is configured to establish a communication connection with the electric vehicle charging management server and receive remote control commands; the communication unit is also configured to communicate with the power company's electricity meter and read grid data; the electricity meter body 100 is provided with a communication unit port 14, the communication unit port 14 is connected to the MCU, and the communication unit is connected through the communication unit port 14. The communication unit includes any one or more of the following: Wi-SUN communication module, Wi-Fi communication module, LTE communication module, and LAN communication module; for example, it is connected to the electric vehicle charging management server through one or more of the following methods: Wi-Fi communication module, LTE communication module, or LAN communication module, to receive and execute remote control commands, and through the optional Wi-SUN communication module or Wi-Fi communication module, it is used to communicate with the power company's electricity meter and read grid data to optimize the charging process.

[0022] The CP / PP module 101 is connected to the MCU, and the CP / PP module 101 includes a CP terminal 11 and a PP terminal 12;The CP terminal 11 is configured to output a PWM signal to achieve charging control function, thereby controlling the charging current and voltage; the PP terminal 12 is configured to detect the status and current capacity of the charging pile to ensure the safety of the charging process; the power output terminal, as described on page 3 / 7 of the specification (CN 121784364 A), includes a power output terminal 13, which, together with the CP terminal 11 and the PP terminal 12, constitutes a charging terminal group with charging function; the high-frequency sampling module (specifically, a high-frequency ADC sampling module) is connected between the power input terminal and the MCU, and is configured to perform high-frequency sampling (e.g., >1 kHz) of the charging voltage and current. It typically uses artificial intelligence (e.g., NILM) algorithms to analyze load characteristics, thereby achieving charging load monitoring and abnormal charging state detection functions, such as analyzing high-frequency sampling waveforms to identify abnormal states and issue warnings or suspend charging.

[0023] The main body 100 of the electricity meter also includes an RS485 module 18, which is connected to the MCU and configured to support communication connections with other external devices (such as photovoltaic inverters, weather stations, or PLC control units) to achieve system integration and expansion.

[0024] The main body 100 of the electricity meter also includes a relay module, which is connected between the MCU and the power output terminal and configured to control the on / off state of the circuit according to received instructions.

[0025] The main body 100 of the electricity meter also includes an LCD display screen 15 and a real-time clock, which are respectively connected to the MCU. In use, it can provide a billing mode based on electricity consumption or time, and display the accumulated electricity consumption, charging time, communication status, and other relevant information on the LCD display screen 15.

[0026] The CP / PP module also includes a CAN transceiver chip, configured for communication with the vehicle based on the CAN bus; the CAN transceiver chip is connected to the MCU; the energy meter body 100 is equipped with an automatic switching mechanism. When it detects that the connected vehicle supports advanced communication (i.e., CAN communication), the CP terminal 11 and PP terminal 12 serve as channels for CAN signal transmission to establish a CAN bus communication connection with the vehicle supporting advanced communication, thereby realizing advanced charging functions, vehicle health diagnosis, and battery status monitoring, and sending the diagnostic report to the electric vehicle charging management server; otherwise, the traditional CP / PP control mode is maintained. The automatic switching mechanism can adopt handshake protocol, voltage or signal detection, etc. In actual design, one or more of the handshake protocol, voltage or signal detection methods can be configured. Specifically: Method 1: For the CP / PP terminal, a detection module is added, configured to detect whether the vehicle supportsAdvanced communication; the detection module is connected to the MCU. When the detection module detects that the vehicle supports advanced communication, the CP / PP terminal serves as a channel for CAN signal transmission, establishing a CAN bus communication connection (i.e., the charging system and electric vehicle charging directly use CAN communication). When the detection module detects that the vehicle does not support advanced communication, the traditional CP / PP control mode is maintained. The detection module includes a voltage detection circuit configured to measure the voltage change of the CP / PP terminal to determine whether the vehicle supports advanced communication. Alternatively, the detection module includes a signal analysis unit configured to analyze the signal characteristics (e.g., frequency, waveform) of the CP / PP terminal. One end of the detection module is connected to the CP / PP terminal, and the other end is connected to the switching control line 102. The MCU has a traditional CP / PP signal connection terminal and a CAN communication connection terminal (the CAN communication connection terminal is connected to a CAN communication module). The switching control line switches the CP / PP terminal to either the traditional CP / PP signal connection terminal or the CAN communication connection terminal based on the detection result of the detection module.

[0027] Method 2: The automatic switching mechanism is as follows: Define specific CAN message frames to confirm the communication capabilities of both parties. For example: Use ISO 15764 and KWP2000 protocols for CAN bus communication, send specific diagnostic message frames during the handshake phase to confirm the communication capabilities of both parties, and dynamically adjust the functional mode of the CP / PP terminals according to the detection results. Regardless of whether it is Method 1 or Method 2, the automatic switching mechanism will adjust the hardware configuration or software protocol stack according to the detection results (specifically, the detection results of the detection module or the confirmation results of the handshake protocol) to achieve function switching.

[0028] It should be noted that the CAN bus is a serial communication protocol widely used in automotive industrial control and other fields. It is used for communication between automotive electronic systems and has the characteristics of high reliability, strong anti-interference ability and good real-time performance. In the CAN communication system described on pages 4 / 7 of the specification, the CAN communication module is a key component. The CAN communication module includes a CAN controller and a CAN transceiver chip. The CAN controller is usually integrated into the processor, microcontroller or embedded system, and there are also independent CAN controllers that can independently send and receive CAN bus data. Therefore, in this invention, if an MCU with an integrated CAN controller is used, the CAN transceiver chip is connected to the CAN transceiver chip; if an MCU without an integrated CAN controller is used, a CAN communication module is added for the CP / PP terminal, the CAN communication module including a CAN controller and the CAN transceiver chip connected to each other, the CAN controller being connected to the MCU.

[0029] Next, the automatic switching charging method is introduced, including the following steps: Step 1, connect the charging plug of the smart energy meter to the vehicle; Step 2, the smart energy meter immediately detects the vehicle's communication capability. It can use voltage changes on the CP / PP terminals, specific signal characteristics (such as frequency, waveform), or handshake signals to determine whether the vehicle supports CAN communication, that is, whether the vehicle's communication capability supports advanced communication (CAN communication), and intelligently select the communication mode based on the detection result; If yes, the CP / PP terminals are used as the channel for CAN signal transmission to establish a CAN bus communication connection with the vehicle. The establishment of CAN bus communication will connect to the vehicle's internal vehicle network system, i.e., the CAN network. When the smart energy meter successfully connects to the vehicle and starts CAN communication, the smart energy meter will determine the vehicle's battery parameters (e.g., capacity, charging current, etc.) and notify the vehicle of its own parameters (e.g., charger capacity, etc.), and then start charging the vehicle (electric vehicle). During this process, the traditional CP / PP function is replaced by CAN communication, which obtains battery status parameters in real time and performs intelligent charging control to ensure the safety and efficiency of the charging process. During the charging process, the smart energy meter and the vehicle continue to monitor the charging status and control parameters such as charging current through CAN communication, realizing battery status monitoring (e.g., reading battery SOC, SOH, etc.), fault diagnosis (e.g., obtaining vehicle fault codes and detailed information through diagnostic protocols (e.g., UDS / KWP2000)), and advanced charging control (e.g., working in conjunction with the vehicle ECU to realize intelligent charging modes, such as constant current / constant voltage charging), until charging is completed and the connection is disconnected; otherwise, the traditional CP / PP control mode is maintained with the CP / PP terminal, and charging of the vehicle (electric vehicle) begins until charging is completed and the connection is disconnected.

[0030] In the charging process of CAN communication mode (also referring to CAN based on CP / PP mode), since the smart energy meter is in a state of bidirectional communication with the vehicle ECU and other systems through the CAN bus interface, it can realize the following functions: 1. Battery health assessment: By long-term monitoring of battery status parameters, the health status of the battery is assessed and its lifespan is predicted.

[0031] 2. Anomaly Detection: Real-time monitoring of abnormal conditions during the charging process (such as overvoltage, undervoltage, and overcurrent), capable of reading vehicle fault codes and sending alarm information via the CAN bus; adjusting the charging mode in conjunction with feedback information from the vehicle ECU to ensure a safe and efficient charging process.

[0032] 3. Energy Management: Communicating with the vehicle's energy management system via CAN bus communication, working collaboratively with the vehicle's energy management system, dynamically adjusting power, and optimizing the charging strategy based on battery information obtained from CAN communication to improve energy utilization efficiency. 4. Information obtained from the CAN bus can then be uploaded to a cloud server via wired or wireless communication modules to achieve...Local or remote cloud monitoring and management (including at least: battery status monitoring, fault diagnosis and charging strategy optimization, V2H control, etc.).

[0033] 5. A new type of smart energy meter that integrates the charging pile function into the energy meter. Before power supply begins, it sends a diagnostic trigger signal to the connected device via CAN communication and is equipped with diagnostic trigger control means to control power supply permission or rejection based on the response of the aforementioned device.

[0034] 6. The new type of smart energy meter has a response recording means that records the aforementioned response with a timestamp and saves it together with multiple power supply histories, or outputs it to the outside.

[0035] A charging system is provided, including the new type of smart energy meter as described above, and also includes a charging plug compatible with electric vehicles. This new type of smart energy meter is compatible with a variety of charging plugs, such as CCS1&2, CCS Type 1&2, etc. The charging plug can be directly selected from standard charging plugs on the market that are compatible with CCS1&2, CCS Type 1 and Type 2, etc., and have CP and PP contacts. One end of the charging plug is a plug end, and the other end is a cable end. The cable end includes a charging detection control line and a charging power line. The charging detection control line is connected to the novel smart energy meter through the PP terminal 12 and the CP terminal 11. The charging power line is connected to the novel smart energy meter through the power output terminal. The energy meter body 100 and other necessary protection devices (e.g., circuit breakers, fuses, etc.) are installed in a waterproof power box. For example, the power input terminal is connected to a circuit breaker and / or other power protection devices, and is installed together with the energy meter body 100 in the waterproof power box to ensure equipment safety. Therefore, the solution of this invention is easy to implement and promote. It is easy to upgrade and improve existing smart energy meters. By connecting the novel smart energy meter to a standard charging plug, it can provide a highly efficient, intelligent, safe charging solution with advanced data analysis capabilities for vehicle charging systems, effectively expanding the functions of traditional energy meters.

[0036] Furthermore, a charging management method is introduced, which is based on the charging system described above, and realizes power metering, charging control and communication functions through the new type of smart energy meter, and interacts with the electric vehicle charging management server; the method includes the following measures: (a) The new type of smart energy meter establishes a communication connection with the electric vehicle charging management server through a communication unit, and receives remote control commands to realize remote control and status monitoring; the electric vehicle charging management server can be a server that supports OCPP or other communication protocols; (b) The new type of smart energy meter outputs a PWM signal through the CP terminal 11 to realize the control of charging current and voltage; (d) The new type of smart energy meter detects the status and current capacity of the charging pile through the PP terminal 12 for diagnostic purposes (specifically...(e) The new smart energy meter can perform high-frequency sampling (>1 kHz) of charging voltage and current through a high-frequency sampling module (the smart energy meter has a built-in high-speed analog-to-digital converter ADC), and collect charging voltage and current data in real time to obtain high-precision voltage and current waveform data. The high-frequency sampling waveform is analyzed to identify abnormal states and issue warnings or suspend charging. The sampling data can be uploaded to the artificial intelligence cloud server through the communication unit, or stored locally / analyzed by artificial intelligence, such as for advanced applications such as non-intrusive load monitoring (NILM), battery health diagnosis and charging process monitoring. The data analysis algorithm can identify charging abnormalities (such as overcurrent, undervoltage, power fluctuation, etc.) and suspend charging when potential dangers are detected to ensure charging safety.

[0037] (f) The new smart energy meter provides a billing mode based on electricity consumption and time, and displays the accumulated electricity consumption, charging time, communication status and other relevant information through the LCD display screen 15. The system calculates the fee based on the accumulated electricity consumption or charging time, and users can pay through the billing mode based on electricity consumption or time to meet the charging needs of different users. Meanwhile, since the RS485 module connects to the photovoltaic inverter and the weather station, it realizes the communication connection between the new smart energy meter and the photovoltaic inverter, and uses solar power and grid power (main power input) to make appropriate adjustments for charging electric vehicles. For example, it prefers to use solar power to achieve energy saving.

[0038] (g) Additional functions: Support CAN based on CP / PP bus communication function to realize advanced vehicle charging function, vehicle health diagnosis and battery status monitoring, and send the diagnostic report to the electric vehicle charging management server.

[0039] (h) Before power supply starts, a diagnostic trigger signal is sent to the connected target device through CAN communication, and a diagnostic trigger control means is provided to control the power supply device to grant or deny power supply according to the response of the aforementioned device.

[0040] (i) It has the ability to record the aforementioned response with a timestamp and save it together with multiple power supply history or output the response record of the specification page 6 / 7 9 CN 121784364 A to the outside.

[0041] In summary, the novel smart energy meter of the present invention integrates power metering, charging control, high-frequency waveform sampling, and communication functions, resulting in a highly integrated, intelligent, and low-cost smart energy meter with integrated charging pile functions. This provides electric vehicle users with an efficient, intelligent, and safe charging solution, facilitating better efficient electric vehicle charging management and services. Specifically, the present invention has the following advantages: 1. By integrating charging pile functions into the energy meter, the present invention significantly reduces the overall cost of charging pile equipment and energy meters in the prior art.

[0042] 2. The novel smart energy meter provides CP and PP terminals for realizing electric vehicle charging functions and PWM control signals.Output, compatible with various charging plugs such as CCS1&2 and CCS Type 1&2.

[0043] 3. The new smart energy meter supports multiple communication modules, realizing seamless connection with charging management servers, power grids, solar power generation systems and other external devices.

[0044] 4. The high-frequency waveform sampling function provides high-precision voltage and current data, supports artificial intelligence analysis functions, such as non-intrusive load monitoring (NILM), battery health diagnosis and charging process monitoring, and other advanced applications, improving charging safety and user experience.

[0045] 5. CAN based on CP / PP bus communication function provides vehicle health diagnosis capabilities, improving charging safety and advanced user experience.

[0046] 6. Used in conjunction with waterproof outer casing and power safety protection measures, it ensures the stable operation of the new smart energy meter in complex environments.

[0047] 7. The energy metering data, charging process data and high-frequency sampling data collected by the new smart energy meter can be uploaded to the upper-level energy management system through the communication unit for unified data management and analysis.

[0048] It should be noted that the electricity meter described in this invention is an auxiliary metering device used for electric vehicle charging and energy management, and is not used as a legally mandated meter by the power company. The metering data, charging data, and related energy data obtained through the smart electricity meter and charging system described in this invention can not only reflect the actual energy usage status, but can also be further used for semantic transformation and control decision support of the energy data. For example, based on the acquired electric vehicle charging data, indicators related to vehicle usage such as drivable distance or greenhouse gas emissions (CO2) can be generated; based on household electricity consumption and power generation data, indicators reflecting energy self-sufficiency calculated over time can be generated; and based on electricity sales data, reference indicators for assessing the remaining charging capacity of electric vehicles can be generated. Through the above-mentioned "data → meaning → control" processing path, the smart electricity meter and charging system not only exist as metering and control devices, but can also provide basic data conditions for subsequent energy management, behavior guidance, and control strategy formulation.

[0049] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention. (See attached figures: 7 / 7 pages, CN 121784364 A, Figure 1; 1 / 7 pages, CN 121784364 A, Figure 3; 2 / 7 pages, CN 121784364 A, Figure 4; 3 / 7 pages, CN 121784364 A, Figure 5; 4 / 7 pages, CN 121784364 A, Figure 5; 4 / 7 pages, CN 121784364 A, Figure 5)121784364 A Figures 6, 7, Drawings of the Specification Page 5 / 7 15 CN 121784364 A Figure 8, Drawings of the Specification Page 6 / 7 16 CN 121784364 A Figure 9, Drawings of the Specification Page 7 / 7 17 CN 121784364 A Abstract The present invention discloses a novel smart energy meter, a charging system, and a charging management method. The novel smart energy meter comprises a meter body, and the meter body comprises an MCU, a metering chip, a power input terminal, a power output terminal, a communication unit, a CP / PP module, and a high-frequency sampling module. The communication unit is configured to establish a communication connection with an electric vehicle charging management server. The CP / PP module comprises a CP terminal and a PP terminal. The CP terminal is configured to output a PWM signal for charging control. The PP terminal is configured to detect the status and current capacity of the charging device. The power output terminal comprises a power output terminal section, which, together with the CP terminal and the PP terminal, forms a charging terminalassembly having a charging function. The high-frequency sampling module is configured to perform high-frequency sampling of charging voltage and current. Thus, a highly integrated, intelligent, and low-cost smart energy meter with an integrated charging function is provided, which is conducive to achieving more efficient electric vehicle charging management and services.

Claims

1. A novel smart energy meter, comprising an energy meter body, the energy meter body including an MCU, a metering chip, a power input terminal, and a power output terminal; the metering chip is connected between the power input terminal and the MCU, and the power output terminal is connected to the MCU, characterized in that, The main body of the energy meter also includes a communication unit, a CP / PP module, and a high-frequency sampling module; The communication unit is connected to the MCU and is configured to establish a communication connection with the electric vehicle charging management server. The CP / PP module is connected to the MCU. The CP / PP module includes a CP terminal and a PP terminal. The CP terminal is configured to output a PWM signal to realize the charging control function. The PP terminal is configured to detect the status and current capacity of the charging pile. The power output terminal includes a power output terminal, which together with the CP terminal and the PP terminal constitute a charging terminal group with charging function. The high-frequency sampling module is connected between the power input terminal and the MCU, and is configured to perform high-frequency sampling of charging voltage and current.

2. The novel smart energy meter according to claim 1, characterized in that, The main body of the electricity meter also includes an RS485 module, which is connected to the MCU and is configured to support communication with external devices.

3. The novel smart energy meter according to claim 1, characterized in that, The main body of the electricity meter also includes a relay module, which is connected between the MCU and the power output terminal and is configured to control the on and off of the circuit according to the received instructions.

4. The novel smart energy meter according to claim 1, characterized in that, The main body of the electricity meter also includes a display screen and a real-time clock, which are respectively connected to the MCU.

5. The novel smart energy meter according to claim 1, characterized in that, The communication unit includes any one or more of the following: Wi-SUN communication module, Wi-Fi communication module, LTE communication module, and LAN communication module.

6. The novel smart energy meter according to claim 1, characterized in that, The CP / PP module also includes a CAN transceiver chip configured for communication with the vehicle via a CAN bus. The CAN transceiver chip is connected to the MCU. The main body of the energy meter is equipped with an automatic switching mechanism. When it detects that the connected vehicle supports advanced communication, the CP and PP terminals serve as channels for CAN signal transmission to establish a CAN bus communication connection with the vehicle that supports advanced communication. Otherwise, the traditional CP / PP control mode is maintained.

7. A charging system, characterized in that, The novel smart energy meter, including any one of claims 1 to 6, further includes a charging plug for compatibility with electric vehicles, one end of the charging plug being a plug end and the other end being a cable end, the cable end including a charging detection control line and a charging power line, the charging detection control line being connected to the novel smart energy meter through the PP terminal and the CP terminal, and the charging power line being connected to the novel smart energy meter through the power output terminal.

8. The charging system according to claim 7, characterized in that, The main body of the electricity meter is installed inside a waterproof power box.

9. The charging system according to claim 8, characterized in that, The power input terminal is connected to a circuit breaker and / or a power protection device, and is installed together with the main body of the electricity meter inside the waterproof power box.

10. A charging management method, characterized in that: Based on the charging system of any one of claims 7 to 9, the method includes the following measures: (a) The new smart energy meter establishes a communication connection with the electric vehicle charging management server through a communication unit and receives remote control commands; (b) The new smart energy meter outputs a PWM signal through the CP terminal to control the charging current and voltage; (d) The new smart energy meter detects the status and current capacity of the charging pile through the PP terminal to ensure the safety of the charging process; (e) The new smart energy meter collects charging voltage and current data in real time through a high-frequency sampling module, analyzes the high-frequency sampling waveform to identify abnormal states and issue warnings or suspend charging. (f) The new smart energy meter provides a billing mode based on electricity consumption and time, and displays the cumulative electricity consumption, charging time and communication status on the display screen.

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