Charging pile and charging pile electricity larceny prevention method and system

Abstract

The invention belongs to the technical field of charging management, and particularly relates to a charging pile and a charging pile electricity larceny prevention method and system. The method comprises the steps that in the charging process, the charging current and the charging voltage of a charging loop collected by a charging pile charging control unit through a first current and voltage sampling module and the charging current and the charging voltage of the charging loop collected by a charging pile electricity meter through a second current and voltage sampling module are obtained; the two paths of collected current and voltage are compared to judge whether the risk of electricity stealing occurs or not, the requirement for the processing capacity of a charging pile chip is low, the newly-added cost is low, the charging pile can be used for most common charging piles installed in the current market, and the charging pile can be widely applied to the field of charging piles through simple technology upgrading and improvement. Therefore, the charging pile can be effectively prevented from being stolen by lawbreakers, the benefits of operators and vehicle owners are further maintained, and the charging safety of the vehicle owners is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of charging management, and particularly relates to a charging pile, a method and a system for preventing electricity theft of a charging pile. Background Art

[0002] In recent years, the electric vehicle industry in China has developed rapidly, and the number of electric vehicles in use has been increasing year by year. With the continuous increase of the penetration rate of electric vehicles, the construction and operation of charging facilities have also developed rapidly. The sustainable profitability of charging piles is the focus of attention of operators and investors. With the popularization of charging piles, due to the lack of effective anti-theft electricity measures for charging piles, some lawbreakers will use charging piles to steal electricity, affecting the interests of operators or charging vehicle owners, and even may cause electricity safety problems to vehicle owners using charging piles for charging, bringing great losses and safety hazards to the operation of charging piles.

[0003] In the face of the above problems, there has been proposed an intelligent charging pile with an anti-theft electricity function. By obtaining a large amount of historical charging data of users, using methods such as random forest to classify and train the data set, analyzing the corresponding relationship between charging power and time in the user charging data, an anomaly detection algorithm model for real-time charging power and abnormal charging behavior is obtained. The intelligent charging pile is built-in with the anomaly detection algorithm model, continuously monitors the real-time power data during the charging process of the vehicle, and identifies any abnormal power fluctuations beyond the preset normal range by analyzing the historical trend and the current state. When multiple abnormal power fluctuations are identified, it is determined that the charging pile has a theft electricity behavior. This anti-theft electricity method requires a high-performance processing chip with the ability to process big data and complex algorithm analysis in the charging pile, which has a high requirement for the intelligence of the charging pile, resulting in a high project cost of the charging pile. And since most of the charging piles already installed on the market are ordinary charging piles and cannot process big data and run complex algorithms, this anti-theft method cannot be adapted to most of the ordinary charging piles already installed on the market, with a small applicable range and low practicality. Summary of the Invention

[0004] The purpose of the present invention is to provide a charging pile, a method and a system for preventing electricity theft of a charging pile, so as to solve the problems that the existing anti-theft electricity method for charging piles has a high cost and cannot be adapted to most of the ordinary charging piles already installed on the market.

[0005] The present invention provides a method for preventing electricity theft of a charging pile to solve the above technical problems, including: During the charging process, obtain the charging current and charging voltage of the charging circuit collected by the charging control unit of the charging pile through the first current and voltage sampling module, and the charging current and charging voltage of the charging circuit collected by the charging pile meter through the second current and voltage sampling module; The charging process refers to that the charging circuit of the charging pile is turned on and outputs a charging current; When any of the following discrimination criteria is met, it is determined that there is a risk of electricity theft, and the charging pile stops charging. The discrimination criteria include: The error between the charging current collected by the charging control unit and the charging current collected by the charging pile meter is greater than the first threshold; The error between the output power of the first charging pile and the output power of the second charging pile is greater than the second threshold; the output power of the first charging pile is calculated based on the charging current and charging voltage collected by the charging control unit, and the output power of the second charging pile is calculated based on the charging current and charging voltage collected by the charging pile meter.

[0006] Furthermore, the discrimination criteria for determining the risk of electricity theft during the charging process also include: the error between the output power of the first charging pile and the output power of the charging pile recorded by the charging meter itself is greater than the second threshold, or the error between the output power of the second charging pile and the output power of the charging pile recorded by the charging meter itself is greater than the second threshold.

[0007] Furthermore, the discrimination criteria for determining the risk of electricity theft during the charging process also include: neither the first current and voltage sampling module in the charging control unit nor the second current and voltage sampling module in the charging pile meter can collect the corresponding charging current.

[0008] Furthermore, the discrimination criteria for determining the risk of electricity theft during the charging process also include: the time during which the SOC value of the electric vehicle remains unchanged exceeds the set time; the SOC value of the electric vehicle is obtained by communicating between the charging control unit and the electric vehicle BMS.

[0009] Furthermore, the method also includes determining whether there is a risk of electricity theft before charging. The determination method is: after each charging ends, obtain and store the cumulative output power of the charging meter, and compare the current cumulative output power of the charging meter before the start of this charging with the cumulative output power of the charging meter after the end of the previous charging stored. If the deviation between the two is greater than the third threshold, it is determined that there is a risk of electricity theft, and the charging pile stops charging.

[0010] The beneficial effects of the above technical solution are as follows: The present invention is an exploratory invention. The charging control unit collects the current and voltage of one charging circuit, and the charging pile meter collects the current and voltage of one charging circuit. The two collected currents and voltages are compared to determine whether there is a risk of electricity theft. When the error between the charging currents collected by the charging control unit and the charging pile meter is greater than the first threshold, if the charging current collected by the charging control unit is larger than the charging current collected by the charging pile meter, it may be that the charging vehicle user has carried out illegal electricity theft, resulting in the data measured by the charging meter being smaller than the actual output current. If the charging current collected by the charging pile meter is larger than the charging current collected by the charging control unit, it may be that illegal personnel have diverted the current that should have been charged to the vehicle during charging; similarly, when the output power of the charging pile calculated by the charging control unit based on the collected voltage and current is larger, it may be that the charging vehicle user has carried out electricity theft. If the output power of the charging pile calculated by the charging pile meter based on the collected voltage and current is larger, it may be that illegal personnel have diverted the current that should have been charged to the vehicle during charging. If the user steals electricity, they will pay less for the charging electricity bill, which affects the interests of the charging pile operator; if illegal personnel steal the current or electricity that should have been charged to the vehicle during charging, the charging vehicle user will pay more for the electricity bill than the actual charging amount, but the operator has indeed output the current corresponding to the electricity bill, which will affect the merchant's reputation and even cause safety risks due to irregular electricity theft. Therefore, the present invention only needs to add a current and voltage sampling module for collecting the charging current and charging voltage in the charging circuit and a module for simple logical judgment based on the data collected by the charging pile meter and the charging control unit to the charging control unit and the charging pile meter on the basis of the original charging pile configuration, and the function of preventing electricity theft can be realized. This method has low requirements for the chip processing ability of the charging pile and low additional cost, and can be used for most ordinary charging piles already installed on the current market. By simply upgrading and improving the technology of the charging pile, the charging pile can be effectively prevented from being stolen by criminals, thereby safeguarding the interests of the operator and the vehicle owner and ensuring the charging safety of the vehicle owner.

[0011] To solve the above technical problems, the present invention also provides a charging pile anti-electricity-theft system, which includes a charging control unit and a charging pile meter of the charging pile, and further includes an anti-electricity-theft unit. The anti-electricity-theft unit is communicatively connected to the charging control unit and the charging pile meter; the charging control unit includes a first current and voltage sampling module, and the charging pile meter includes a second current and voltage sampling module. Both the first current and voltage sampling module and the second current and voltage sampling module are used to collect the charging current and charging voltage of the charging circuit; the anti-electricity-theft unit is used to obtain the charging current and charging voltage collected by the first current and voltage sampling module and the second current and voltage sampling module respectively during the charging process. The charging process refers to the charging circuit of the charging pile being turned on and outputting a charging current; and when any of the discrimination criteria is met, it is determined that there is a risk of electricity theft, and the charging pile is controlled to stop charging. The discrimination criteria include: The error between the charging current collected by the charging control unit and the charging current collected by the charging pile meter is greater than the first threshold value; The error between the output power of the first charging pile and the output power of the second charging pile is greater than the second threshold value; the output power of the first charging pile is calculated according to the charging current and charging voltage collected by the charging control unit, and the output power of the second charging pile is calculated according to the charging current and charging voltage collected by the charging pile meter.

[0012] Further, the discrimination criteria for the anti-stealing unit to judge the risk of stealing electricity during the charging process also include: the error between the output power of the first charging pile and the output power of the charging pile recorded by the charging meter itself is greater than the second threshold value, or the error between the output power of the second charging pile and the output power of the charging pile recorded by the charging meter itself is greater than the second threshold value.

[0013] Further, the discrimination criteria for the anti-stealing unit to judge the risk of stealing electricity during the charging process also include: the time when the SOC value of the electric vehicle remains unchanged exceeds the set time; the SOC value of the electric vehicle is obtained through the communication between the charging control unit and the electric vehicle BMS.

[0014] Further, the anti-stealing unit is also used to judge whether there is a risk of stealing electricity before charging. The judgment method is: after each charging ends, the anti-stealing unit obtains and stores the cumulative output power of the charging meter, and compares the current cumulative output power of the charging meter with the stored cumulative output power of the charging meter after the previous charging ends before this charging starts. If the deviation between the two is greater than the third threshold value, it is judged that there is a risk of stealing electricity, and the charging pile stops charging.

[0015] To solve the above technical problems, the present invention also provides a charging pile, which is used to realize the anti-stealing protection of the charging pile by using the above-introduced anti-stealing method for charging piles.

[0016] The beneficial effects of the above technical solutions are as follows: The present invention is an exploratory invention. In the charging pile, the charging control unit collects the current and voltage of one charging circuit, and the charging pile meter collects the current and voltage of one charging circuit, and compares the two collected currents and voltages to judge whether there is a risk of stealing electricity. Only by adding a current and voltage sampling module for collecting the charging current and charging voltage in the charging circuit and a module for simple logical judgment according to the data collected by the charging pile meter and the charging control unit in the charging control unit and the charging pile meter can the function of preventing stealing electricity be realized. This method has a low requirement for the chip processing ability of the charging pile, and the cost of realizing the anti-stealing function is low. By simply upgrading and improving the existing configured charging pile, it can effectively prevent the charging pile from being stolen by lawbreakers, thereby safeguarding the interests of operators and vehicle owners and ensuring the charging safety of vehicle owners. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the anti-stealing electricity system of the charging pile in the embodiment of the present invention. Specific embodiments

[0018] In order to make the purpose, technical solutions and advantages of the present invention clearer, the specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0019] The inventive concept of the present invention is: the charging control unit collects the current and voltage of a charging circuit, and the charging pile meter collects the current and voltage of a charging circuit. The two collected currents and voltages are compared to determine whether there is a risk of stealing electricity. The whole device only needs to add two current and voltage acquisition modules and a judgment module, and simple comparison and judgment are carried out according to the collected current and voltage data, so that the anti-stealing electricity function can be added to the charging pile. The transformation cost is relatively low, the requirement for the chip processing ability of the charging pile is relatively low, and it is applicable to most ordinary charging piles already installed on the market, thus effectively preventing the electric energy of the charging pile from being stolen or illegally used.

[0020] Embodiment of the charging pile A charging pile of the present invention includes an anti-stealing electricity system of the charging pile for realizing the anti-stealing electricity protection of the charging pile. Among them, the anti-stealing electricity system of the charging pile is as Figure 1 shown, and includes a charging control unit of the charging pile, a charging pile meter and an anti-stealing electricity unit. The charging control unit, the charging pile meter and the anti-stealing electricity unit are all provided with data transmission modules. The anti-stealing electricity unit is communicatively connected with the charging control unit and the charging pile meter through the data transmission modules for realizing data interaction. The anti-stealing electricity unit can transmit data with the charging control unit through the CAN communication protocol and transmit data with the charging pile meter through the RS485 protocol.

[0021] Considering that during the charging process, the charging control unit communicates with the BMS system of the electric vehicle and can obtain the charging information of the vehicle battery. The charging pile meter is used to calculate the charging information output by the charging pile and perform billing. When the vehicle charging information does not match the information of the charging pile meter, there may be a risk of electricity theft, which affects the interests of charging users or charging pile operators. Therefore, in the present invention, a first current and voltage sampling module is set in the charging control unit, and a second current and voltage sampling module is set in the charging pile meter. Specifically, the charging control unit further includes a charging control module and a first current and voltage sampling module. The charging control module is used to control the on / off of the positive and negative bus contactors of the charging circuit of the charging pile according to the control instructions issued by the anti-electricity-theft unit, and thus control the start and stop of the charging of the charging pile. The first current and voltage sampling module is used to collect the charging current and charging voltage of the charging circuit, including a voltage sampling circuit and a current sampling circuit. Among them, the voltage sampling circuit is that the voltage sampling module (such as a voltage sensor) uses two wires to connect the positive and negative busbars of the charging circuit respectively to collect the voltage of the charging circuit. The current sampling circuit is to collect the current value of the positive or negative busbar in the charging circuit. As a preferred embodiment, a shunt can be used for current sampling. The principle of shunt current sampling is to convert the voltage drop at both ends of the shunt into current in proportion. As Figure 1 shown, the current sampling module uses two wires to connect the front and rear ends of the shunt on the negative busbar of the charging circuit respectively to collect the current value of the charging circuit. As other embodiments, a Hall sensor can also be used to directly pass through the positive or negative busbar to collect the current value of the charging circuit. The sampling points of the current and voltage sampling module are located between the positive and negative bus contactors and the charging gun. The data transmission module of the charging control unit can also be communicatively connected with the battery management system BMS of the charging vehicle through the CAN communication protocol, so as to obtain the real-time SOC value during vehicle charging.

[0022] The charging pile meter is an instrument used to measure and record the electric energy consumed by the electric vehicle during charging. It is required to accurately record the actual electricity consumption of the vehicle owner according to the charging current, charging voltage and charging time without error, and use this as the basis for billing. In the present invention, in addition to the data transmission module and the original calculation module for recording the output power of the charging pile, the charging pile meter is also provided with a second current and voltage sampling module. The second current and voltage sampling module is similar to the first current and voltage sampling module and also includes a voltage sampling circuit and a current sampling circuit, which are used to collect the charging voltage and charging current of the charging circuit. Among them, the voltage sampling circuit collects the voltage value between the positive and negative busbars of the charging circuit, and the current sampling circuit collects the current value of the positive or negative busbar in the charging circuit. Its data transmission module is connected to the anti-electricity-theft unit through a communication line and communicates with it based on the 485 communication protocol, and transmits the charging time recorded by the charging meter calculation module, the output power of the charging pile, and the charging current and charging voltage collected by the second current and voltage sampling module to the anti-electricity-theft unit.

[0023] The anti-stealing electricity unit further includes an anti-stealing electricity judgment module, which is built-in with a logic judgment program for judging whether there is a risk of stealing electricity. It includes the judgment of the risk of stealing electricity before charging starts and the judgment of the risk of stealing electricity during the charging process.

[0024] 1. Judgment of the risk of stealing electricity before charging starts.

[0025] After each charging ends, the anti-stealing electricity unit obtains and stores the cumulative output power of the charging electric meter. Before the start of this charging, the current cumulative output power of the charging electric meter is compared with the cumulative output power of the charging electric meter stored after the last charging ended. If the deviation between the two is greater than the third threshold, it is judged that there is a risk of stealing electricity, and the charging pile stops charging. The third threshold is adaptively set according to the sampling accuracy. For example, it is set to 5%. Before the start of this charging, if the deviation between the current cumulative output power shown by the charging electric meter and the cumulative output power stored by the anti-stealing electricity unit is greater than 5%, it indicates that there may be illegal electricity stealing behavior not recorded by the charging electric meter. At this time, for charging safety and the interests of the operator, it is necessary to control the positive and negative bus contactors of the charging circuit to remain disconnected and stop charging. If there is no risk of stealing electricity, it is processed according to the normal charging process, and the positive and negative bus contactors of the charging circuit are controlled to close, and normal charging continues until the charging ends.

[0026] 2. Judgment of the risk of stealing electricity during the charging process.

[0027] The charging process refers to that the charging circuit of the charging pile is turned on and outputs a charging current. The anti-stealing electricity unit judges whether there is electricity stealing behavior by obtaining the data uploaded by the charging control unit and the charging pile electric meter. When it is judged that there is electricity stealing behavior, a control instruction is sent to the charging control unit to disconnect the positive and negative bus contactors of the charging circuit, so that the charging pile stops charging. If there is no risk of stealing electricity, normal charging continues until the charging ends. The discrimination criteria include: 1) The error between the charging current collected by the charging control unit and the charging current collected by the charging pile electric meter is greater than the first threshold.

[0028] Among them, the first threshold is adaptively set according to the current sampling accuracy. For example, in this embodiment, according to the accuracy of the current sampling circuit, the first threshold is set to 10% of the charging current collected by the charging pile electric meter. During the charging process, if the error between the charging current value sampled by the charging control unit and the charging current value sampled by the charging pile electric meter is greater than 10% of the charging current collected by the charging pile electric meter, it is judged that there is a risk of stealing electricity and charging needs to be stopped.

[0029] 2) The error between the output power of the first charging pile and the output power of the second charging pile is greater than the second threshold.

[0030] The output power of the first charging pile is calculated based on the charging current and charging voltage collected by the charging control unit, and the output power of the second charging pile is calculated based on the charging current and charging voltage collected by the charging pile electricity meter. The second threshold is set according to the accuracy of the current-voltage sampling module and the metering accuracy of the charging time. For example, in this embodiment, it is set to 5% of the output power of the second charging pile. The anti-theft electricity unit calculates the output power of the charging pile based on the charging current, charging voltage collected by the charging control unit, and the charging time uploaded by the metering module, which is recorded as the output power of the first charging pile; calculates the output power of the charging pile based on the charging current, charging voltage collected by the charging pile electricity meter, and the charging time uploaded by the metering module, which is recorded as the output power of the second charging pile. When the error between the output power of the first charging pile and the output power of the second charging pile is greater than the second threshold (such as 5%), it is determined that there is a risk of electricity theft and charging needs to be aborted.

[0031] 3) After the anti-theft electricity unit obtains the output power of the charging pile recorded by the charging pile electricity meter itself and calculates the output power of the first charging pile and the output power of the second charging pile, it compares the output power of the first charging pile and the output power of the second charging pile with the output power of the charging pile recorded by the charging meter itself. If the error between the output power of the first charging pile and the output power of the charging pile recorded by the charging meter itself is greater than the second threshold or the error between the output power of the second charging pile and the output power of the charging pile recorded by the charging meter itself is greater than the second threshold, it is determined that there is a risk of electricity theft and charging needs to be aborted.

[0032] 4) The first current-voltage sampling module in the charging control unit and the second current-voltage sampling module in the charging pile electricity meter cannot collect the corresponding charging current.

[0033] When neither the charging control unit nor the charging pile electricity meter can collect the charging current, it may be because the cable of the charging circuit is damaged, and illegal personnel connect the output line of the charging pile to their own line for electricity theft. Therefore, in this case, it is determined that there is a risk of electricity theft and charging is aborted.

[0034] 5) The time when the SOC value of the electric vehicle remains unchanged exceeds the set time.

[0035] During the charging process, the charging control unit interacts with the BMS of the electric vehicle to obtain the state of charge (SOC) value of the electric vehicle's battery. The anti-theft electricity unit communicates with the charging control unit to obtain the SOC value of the electric vehicle. When the SOC value does not change for more than the set time, it means that the charging pile power may not be charged to the electric vehicle, and it is determined that there may be a risk of electricity theft and charging needs to be aborted. The set time is set according to the battery capacity of the electric vehicle and the detection accuracy of the SOC change rate. For example, it is set to 3 minutes, and there is no limit here.

[0036] Method embodiment A method for preventing electricity theft in a charging pile of the present invention includes judging the risk of electricity theft before charging starts and judging the risk of electricity theft during the charging process. Among them, the judgment of the risk of electricity theft during the charging process includes the following steps: S1: Data collection and transmission.

[0037] During the charging process, obtain the charging current and charging voltage of the charging circuit collected by the charging control unit of the charging pile through the first current and voltage sampling module, the charging current and charging voltage of the charging circuit collected by the charging pile meter through the second current and voltage sampling module, the SOC value of the electric vehicle, and the charging time and charging output power recorded by the charging meter.

[0038] S2: Judging the risk of electricity theft during the charging process.

[0039] When any of the following discrimination criteria is met, it is judged that there is a risk of electricity theft during the charging process, and the charging pile stops charging. The discrimination criteria include: 1) The error between the charging current collected by the charging control unit and the charging current collected by the charging pile meter is greater than the first threshold, and the first threshold is adaptively set according to the current sampling accuracy.

[0040] 2) The error between the output power of the first charging pile and the output power of the second charging pile is greater than the second threshold, and the second threshold is set according to the accuracy of the current and voltage sampling module and the measurement accuracy of the charging time.

[0041] Calculate the output power of the first charging pile according to the charging current and charging voltage collected by the charging control unit, and calculate the output power of the second charging pile according to the charging current and charging voltage collected by the charging pile meter.

[0042] 3) The error between the output power of the first charging pile and the output power of the charging pile recorded by the charging meter itself is greater than the second threshold, or the error between the output power of the second charging pile and the output power of the charging pile recorded by the charging meter itself is greater than the second threshold.

[0043] 4) Neither the first current and voltage sampling module in the charging control unit nor the second current and voltage sampling module in the charging pile meter can collect the corresponding charging current.

[0044] 5) The time when the SOC value of the electric vehicle remains unchanged exceeds the set time.

[0045] S3: Stop charging or charge normally.

[0046] If there is a risk of electricity theft, the charging control unit disconnects the positive and negative bus contactors of the charging circuit and stops charging; if there is no risk of electricity theft, it charges normally until the charging is completed.

[0047] The method for judging whether there is a risk of electricity theft before charging starts is as follows: After each charging ends, obtain and store the cumulative output power of the charging electricity meter. Before the start of this charging, compare the current cumulative output power of the charging electricity meter with the cumulative output power of the charging electricity meter after the last charging end stored. If the deviation between the two is greater than the third threshold, it is judged that there is a risk of electricity theft, and the charging pile stops charging.

[0048] System embodiment A charging pile anti-electricity-theft system of the present invention. The specific composition of this system has been described in detail in the charging pile embodiment and will not be elaborated here.

[0049] The present invention sets up a current and voltage sampling module for collecting the charging current and charging voltage output by the charging circuit respectively in the charging control unit and the charging pile electricity meter. By comparing the two sets of data during the charging process to judge whether there is a risk of electricity theft, the device is simple, has a low cost and is easy to promote. It also uses the charging control unit to communicate with the BMS of the charging vehicle to obtain the SOC value, judges the anti-electricity-theft risk according to the SOC value, and uses the relatively accurate charging pile output power recorded by the original calculation unit of the charging pile electricity meter to judge the electricity theft risk. Before the start of charging, it also judges whether there is a risk of electricity theft before this charging by using the cumulative output power recorded at the end of the last time and the cumulative output power recorded by the charging pile electricity meter before this charging. When there is a risk of electricity theft, this charging is stopped in time, which can judge whether there is a risk of electricity theft from multiple angles, can prevent and stop the electricity theft behavior to the greatest extent, effectively prevent the charging pile from being stolen by criminals, and then safeguard the interests of the operator and the vehicle owner and ensure the charging safety of the vehicle owner.

Claims

1. A charging pile anti-electricity theft method, characterized in that: include: During the charging process, the charging current and charging voltage of the charging circuit collected by the charging control unit of the charging pile through the first current and voltage sampling module, and the charging current and charging voltage of the charging circuit collected by the charging pile meter through the second current and voltage sampling module are obtained; the charging process refers to the charging circuit of the charging pile being turned on and outputting the charging current; When any of the following criteria is met, it is judged that there is a risk of power theft and the charging pile stops charging. The criteria include: The error between the charging current collected by the charging control unit and the charging current collected by the charging pile meter is greater than a first threshold; The error between the output power of the first charging pile and the output power of the second charging pile is greater than a second threshold; the output power of the first charging pile is calculated based on the charging current and charging voltage collected by the charging control unit, and the output power of the second charging pile is calculated based on the charging current and charging voltage collected by the charging pile meter.

2. The method for preventing electricity theft in a charging pile according to claim 1, characterized in that: The judgment criteria for determining the risk of electricity theft during the charging process also include: the error between the output power of the first charging pile and the output power of the charging pile recorded by the charging meter itself is greater than a second threshold or the error between the output power of the second charging pile and the output power of the charging pile recorded by the charging meter itself is greater than the second threshold.

3. The charging pile anti-electricity theft method according to claim 1 or 2, characterized in that: The criteria for judging the risk of electricity theft during the charging process also include: the first current and voltage sampling module in the charging control unit and the second current and voltage sampling module in the charging pile meter cannot collect the corresponding charging current.

4. The charging pile anti-electricity theft method according to claim 1 or 2, characterized in that: The criteria for judging the risk of electricity theft during the charging process also include: the SOC value of the electric vehicle remains unchanged for more than a set time; and the SOC value of the electric vehicle is obtained by communicating between the charging control unit and the BMS of the electric vehicle.

5. The charging pile anti-electricity theft method according to claim 1 or 2, characterized in that: The method also includes determining whether there is a risk of electricity theft before charging. The determination method is: after each charging is completed, the cumulative output power of the charging meter is obtained and stored. Before the current charging starts, the current cumulative output power of the charging meter is compared with the stored cumulative output power of the charging meter after the last charging is completed. If the deviation between the two is greater than a third threshold, it is determined that there is a risk of electricity theft and the charging pile stops charging.

6. A charging pile anti-electricity theft system, comprising a charging control unit of a charging pile and an electric meter of the charging pile, characterized in that: It also includes an anti-electricity theft unit, which is connected to the charging control unit and the charging pile meter; the charging control unit includes a first current and voltage sampling module, and the charging pile meter includes a second current and voltage sampling module, and the first current and voltage sampling module and the second current and voltage sampling module are both used to collect the charging current and charging voltage of the charging circuit; the anti-electricity theft unit is used to obtain the charging current and charging voltage collected by the first current and voltage sampling module and the second current and voltage sampling module respectively during the charging process, and the charging process refers to the charging circuit of the charging pile being turned on and outputting the charging current; When any of the criteria are met, the risk of electricity theft is determined and the charging pile is controlled to stop charging. The criteria include: The error between the charging current collected by the charging control unit and the charging current collected by the charging pile meter is greater than a first threshold; The error between the output power of the first charging pile and the output power of the second charging pile is greater than a second threshold; the output power of the first charging pile is calculated based on the charging current and charging voltage collected by the charging control unit, and the output power of the second charging pile is calculated based on the charging current and charging voltage collected by the charging pile meter.

7. The charging pile anti-electricity theft system according to claim 6, characterized in that: During the charging process, the anti-electricity theft unit determines that there is a risk of electricity theft by a judgment criterion that: an error between the output power of the first charging pile and the output power of the charging pile recorded by the charging meter itself is greater than a second threshold, or an error between the output power of the second charging pile and the output power of the charging pile recorded by the charging meter itself is greater than the second threshold.

8. The charging pile anti-electricity theft system according to claim 6 or 7, characterized in that: During the charging process, the anti-electricity theft unit determines that there is an electricity theft risk by further determining that: the SOC value of the electric vehicle remains unchanged for a period of time exceeding a set time; and the SOC value of the electric vehicle is obtained by communicating between the charging control unit and the electric vehicle BMS.

9. The charging pile anti-electricity theft system according to claim 6 or 7, characterized in that: The anti-electricity theft unit is also used to determine whether there is a risk of electricity theft before charging. The determination method is as follows: after each charging is completed, the anti-electricity theft unit obtains and stores the cumulative output power of the charging meter. Before the start of this charging, the current cumulative output power of the charging meter is compared with the stored cumulative output power of the charging meter after the last charging. If the deviation between the two is greater than a third threshold, it is determined that there is a risk of electricity theft and the charging pile stops charging.

10. A charging pile, characterized in that: The charging pile is used to implement anti-electricity theft protection of the charging pile by adopting the anti-electricity theft method for the charging pile as described in any one of claims 1 to 5.

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