Method and system for detecting running state of power module of charging pile

Abstract

The invention belongs to the technical field of charging pile detection, and particularly relates to a method and a system for detecting the running state of a charging pile power supply module, and the system comprises a power supply monitoring module which is used for obtaining the data of a charging pile power supply during running. The data comprises the actual output power of the charging pile power supply, a real-time noise value and the real-time temperature of the charging pile power supply; the power supply data judgment module is used for judging whether the data of the charging pile power supply in operation is normal or not; the execution module is used for carrying out charging and power-off control on the charging pile on the basis of the information of the power supply data judgment module; and the power supply data judgment module judges whether the data during the operation of the charging pile power supply is normal or not, specifically, whether the actual output power of the charging pile power supply is normal or not is judged, if yes, the charging pile performs normal charging, and if not, the noise value of the charging pile is detected.

Description

Technical Field

[0001] The present invention belongs to the technical field of charging pile detection, and in particular to a method and system for detecting the operating status of a charging pile power module. Background Art

[0002] The charging pile power module is a very critical component of the charging pile. It is mainly responsible for converting AC power into DC power and adjusting the output voltage and current to meet the charging needs of electric vehicles. The power module usually includes overvoltage protection, overcurrent protection and short-circuit protection to ensure safety during the charging process.

[0003] The prior art also proposes some solutions. For example, a patent application with publication number CN111993946A discloses a method and system for detecting AC and DC charging piles for electric vehicles. The detection system for AC and DC charging piles for electric vehicles includes an AC and DC charging pile identification device, a charging interface detection device, an on-board map module, an on-board computer, a charging patrol module, and a charging interface detection device. The charging interface detection device first detects the tightness of the connection between the charging line interface and the vehicle charging interface. If the tightness meets the requirements, charging is performed; after the charging time reaches the set stay time, the charging is completed. This solution can help car owners choose charging strategies and help reduce the loss of electric vehicle batteries.

[0004] Although the above technical solution solves the problem of helping car owners choose a charging strategy, there are still other problems in the specific operation. For example, there may be many situations during the charging process. If the power output power of the charging pile is abnormal, it is difficult to judge which aspects of the charging pile have problems based on the specific situation and take protective measures.

[0005] To this end, the present invention provides a method and system for detecting the operating status of a charging pile power module. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: the operating status detection system of the charging pile power module described in the present invention comprises: Power supply monitoring module: The power supply monitoring module is used to obtain the data of the charging pile power supply during operation, and the data includes the actual output power of the charging pile power supply, the real-time noise value and the real-time temperature of the charging pile power supply; Power supply data judgment module: The power supply data judgment module is used to judge whether the data of the charging pile power supply during operation is normal; Execution module: The execution module controls the charging and disconnection of the charging pile based on the module information determined according to the power supply data; The power supply data judgment module determines whether the data of the charging pile power supply during operation is normal, specifically: determining whether the actual output power of the charging pile power supply is normal. If it is normal, the charging pile is charged normally. If it is not normal, the noise value of the charging pile is detected; If the noise value of the charging pile is abnormal, the charging pile will be disconnected from charging. If the noise value of the charging pile is normal, the power supply temperature of the charging pile will be detected. If it is normal, the charging pile will charge normally. If it is abnormal, the charging power of the charging pile will be reduced.

[0008] Preferably, the power data judgment module determines whether the actual output power of the charging pile power supply is normal based on: The power monitoring module obtains the actual output power of the charging pile during the charging process at intervals of 1 minute. , and create a text collection ;in is the actual output power of the charging pile at the 1st minute, is the actual output power of the charging pile at the 2nd minute, and so on; Calculate the actual charging power fluctuation value in the text collection ; ; Where N is the number of data points in the text collection; is a set of actual output power values ​​in the text collection; The average value in the text collection; Preset the maximum threshold of fluctuations in the text collection ; like , the charging pile is charging normally; like , the power monitoring module outputs a signal to detect the noise value.

[0009] Preferably, the average value in the text collection The specific calculation method is:

[0010] Where N is the number of data points in the text collection, is one of the actual charging power values ​​in the text collection; Specifically, when the charging pile just starts charging, the charging efficiency per minute is obtained, and the average value of the charging efficiency values ​​per adjacent minute is calculated to obtain the average value in the text set. , and by the average Calculate and combine the standard deviation value to indirectly detect whether the efficiency of the charging pile in the initial charging stage is abnormal.

[0011] Preferably, based on the power monitoring module receiving When the information is received, the power data judgment module is used to judge the noise value. Is it normal? And calculated by the formula:

[0012] in, is the continuous noise value of the charging pile, T is the noise measurement time, and e is the noise value at time t; The maximum noise threshold of the charging pile during charging is preset to ; like , the power monitoring module outputs a signal for detecting the temperature of the charging pile power supply; like , the execution module outputs a signal that the charging pile disconnects charging.

[0013] Preferably, the execution module is also used to reduce the charging efficiency of the charging pile; Based on the power monitoring module receives When the detection information is received, the power monitoring module obtains the ambient temperature of the charging pile power supply ; Pre-set the maximum safe temperature threshold of the charging pile power supply ; like , the execution module outputs a signal that reduces the charging efficiency of the charging pile; like , then the charging pile is charging normally Preferably, based on the execution module receiving When the information is displayed, the charging efficiency of the charging pile is reduced as follows: Adjust the charging power of the charging pile ; And calculated according to the formula: ; in, The actual output power of the charging pile at present; The estimated adjusted temperature of the charging pile; Temperature when charging the charging station; It is the maximum safe temperature threshold of the charging pile power module.

[0014] Specifically, when the chemical reaction speed inside the battery is accelerated due to high temperature, the battery may overheat, thereby affecting the performance and life of the battery and reducing the charging efficiency. It is necessary to reduce the charging efficiency in time. The specific way to reduce the charging efficiency is to reduce the charging current or voltage, thereby reducing the power output.

[0015] Preferably, the operation status detection system further includes an abnormality detection module, and the abnormality detection module is used to perform abnormality monitoring on the charging pile cable; After the execution module reduces the output efficiency of the charging pile, the power monitoring module continues to monitor the power temperature of the charging pile as follows: Calculate the current temperature every 30 seconds The maximum safe temperature threshold of the charging pile power module The difference between ; Create a collection text of the temperature difference calculated at 30s intervals ,in The difference is 30s. is the difference at 1min, The difference is 5 minutes; Observe the values ​​in the set text, if the values ​​gradually increase or the values ​​are close, the anomaly detection module outputs a signal for detecting anomalies of the cable; If the value in the set text gradually decreases, the charging pile is charging normally.

[0016] Preferably, the abnormality detection module is used to monitor the abnormality of the charging pile cable, including: The abnormality detection module includes a visual sensor, which is used to detect whether the surface of the charging pile cable is damaged or has poor contact. If the charging pile cable is damaged or has poor contact, a signal is generated and transmitted to the execution module, and the charging pile is disconnected from charging; Charging pile cable detection: Damage to the charging pile cable, poor contact or excessive length of the cable will reduce charging efficiency; If the charging efficiency is lower than expected, you can check and solve the above possible reasons one by one. For example, if it is due to aging or improper maintenance of the charging equipment, you may need to replace parts or perform professional maintenance. If it is due to the mismatch between the charging pile and the vehicle, you may need to replace the appropriate charging pile or use an adapter. If it is due to power supply problems, you need to contact the power supplier to solve it. Preferably, the abnormality detection module also includes charging pile interface detection, specifically: The abnormality detection module also includes a BMS simulator, and the BMS simulator is used to detect the communication of the vehicle during the charging process; If the communication between the charging pile and the vehicle matches normally, the charging pile will charge normally; If the communication between the charging pile and the vehicle is not properly matched, the charging pile will disconnect the charging.

[0017] Preferably, a method for detecting the operating status of a charging pile power module comprises the following steps: S1. Obtain the actual output power, real-time noise value and real-time temperature of the charging pile power supply during operation through the power supply monitoring module; S2. Determine whether the actual output power of the power supply, the real-time noise value and the real-time temperature of the charging pile power supply are normal through the power supply data judgment module; S3. If the actual output power of the power supply is normal, the charging pile is charging normally. If it is abnormal, the noise value of the charging pile is detected; If the noise value of the charging pile is abnormal, the charging pile will be disconnected from charging. If the noise value of the charging pile is normal, the power supply temperature of the charging pile will be detected. If it is normal, the charging pile will charge normally. If it is abnormal, the charging power of the charging pile will be reduced.

[0018] The beneficial effects of the present invention are as follows: 1. The operating status detection method and system of a charging pile power module described in the present invention ensure the normal progress of the charging process by detecting whether the output voltage and current of the power module are within the specified range. When the output voltage exceeds the preset maximum value, the overvoltage protection circuit is activated. Usually, the output voltage is detected by a comparator and compared with a reference voltage. Once the threshold is exceeded, the protection mechanism is triggered to shut down the power output or limit the voltage; undervoltage protection: if the input voltage is lower than the normal operating range, the undervoltage protection will prevent the power module from starting to prevent unstable voltage from damaging the load; overcurrent protection: overcurrent protection usually uses a current sensor or a detection resistor to monitor the current. When the current exceeds the set value, the protection circuit responds.

[0019] 2. The method and system for monitoring the operating status of a charging pile power module described in the present invention monitor the noise. If an abnormal noise value is heard from the charging pile during the charging process, the execution module controls the charging pile to stop charging immediately to avoid possible equipment damage or safety accidents. Staff come to check whether the charging pile has obvious visible damage, deformation or other conditions. At the same time, warning signs are set around the charging pile to prevent others from approaching and using the charging pile to avoid danger. Sometimes the noise may be caused by external factors, such as small animals getting into the charging pile or strong wind blowing the charging cable, etc. Check and eliminate these possibilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1is a system diagram of the present invention; Figure 2 It is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0023] The charging pile power module is a very critical component of the charging pile. It is mainly responsible for converting AC power into DC power and adjusting the output voltage and current to meet the charging needs of electric vehicles. The power module usually includes overvoltage protection, overcurrent protection and short circuit protection to ensure the safety of the charging process. like Figure 1 As shown, a charging pile power module operation status detection system according to an embodiment of the present invention includes a power monitoring module, a power data judgment module and an execution module; Power supply monitoring module: The power supply monitoring module is used to obtain the data of the charging pile power supply during operation, and the data includes the actual output power of the charging pile power supply, the real-time noise value and the real-time temperature of the charging pile power supply; Power supply data judgment module: The power supply data judgment module is used to judge whether the data of the charging pile power supply during operation is normal; Execution module: The execution module controls the charging and disconnection of the charging pile based on the module information determined according to the power supply data; The power supply data judgment module determines whether the data of the charging pile power supply during operation is normal, specifically: determining whether the actual output power of the charging pile power supply is normal. If it is normal, the charging pile is charged normally. If it is not normal, the noise value of the charging pile is detected; If the noise value of the charging pile is abnormal, the charging pile will be disconnected from charging. If the noise value of the charging pile is normal, the power supply temperature of the charging pile will be detected. If it is normal, the charging pile will charge normally. If it is abnormal, the charging power of the charging pile will be reduced.

[0024] The power monitoring module is connected to the charging pile, and is used to measure the charging data of the charging pile and the status data of the charging device, and can send the acquired charging interface identification information, the input voltage and current of the charging pile, and the output voltage and current of the charging pile to the power data judgment module; The power judgment module is used to receive the detection information sent by the power detection module, monitor and manage the operating status and environment of the charging pile in real time, and send charging and disconnection information to the execution module; the charging pile execution module includes a charging and disconnection controller, which performs charging and disconnection control according to the charging and disconnection information of the charging pile power judgment module; When the charging pile power supply is charging, first monitor in real time whether the actual output power of the charging pile power supply is normal. The actual output power of the charging pile power supply is the amount of electric energy provided to the load under actual working conditions. If the actual output power is normal, the charging pile power supply is charging normally. If the actual output power is abnormal, first check whether the noise of the charging pile is normal. During the charging process, the cooling fan of the charging pile will generate noise when rotating at high speed. If the noise is too loud, it may be due to temperature changes. The power converter inside the charging pile will also generate sound during operation. Therefore, if the noise is abnormal, the power should be cut off in time. If the noise is abnormal, continue to check whether the power supply temperature is normal. Since the charging power increases slowly in the early stage of charging, the temperature of the charging pile will gradually increase when the power gradually increases. If the temperature changes abnormally, the charging efficiency will be reduced or the charging will be disconnected in time. If the temperature meets the initial growth rate of charging, the charging pile power supply will charge normally. By real-time monitoring of the actual output power, noise value and power supply temperature of the charging pile, when charging abnormalities occur, the cause of the abnormal charging can be quickly found, and it can be determined whether to charge in the future. A variety of protective measures are taken to protect the charging pile, thereby improving the efficiency, stability and safety of the charging pile during the charging process.

[0025] The overvoltage protection is activated by real-time monitoring of the actual output power of the charging pile power supply and real-time temperature detection: the output voltage and current of the power module are detected to ensure the normal charging process. When the output voltage exceeds the preset maximum value, the overvoltage protection circuit is activated. Usually, the output voltage is detected by a comparator and compared with the reference voltage. Once the threshold is exceeded, the protection mechanism will be triggered to shut down the power output or limit the voltage; undervoltage protection: if the input voltage is lower than the normal operating range, the undervoltage protection will prevent the power module from starting to prevent unstable voltage from damaging the load; overcurrent protection.

[0026] The power data judgment module determines whether the actual output power of the charging pile power supply is normal or not. Specifically: The power monitoring module obtains the actual output power of the charging pile during the charging process at intervals of 1 minute. , and create a text collection ;in is the actual output power of the charging pile at the 1st minute, is the actual output power of the charging pile at the 2nd minute, and so on; Calculate the actual charging power fluctuation value in the text collection ; ; Where N is the number of data points in the text collection; is a set of actual output power values ​​in the text collection; The average value in the text collection; Preset the maximum threshold of fluctuations in the text collection ; like , the charging pile is charging normally; like , the power monitoring module outputs a signal to detect the noise value; it should be noted that when the charging pile is charging, there are several charging methods as follows: When the battery power is low or has not been charged for a long time, the charging station will pre-charge at a lower current to activate the battery and avoid damage to the battery caused by high current; After the battery voltage reaches a certain value, the charging pile will charge at a constant current. This is the most efficient charging stage because the battery can absorb a larger current without overheating. When the battery voltage approaches its rated voltage, the charging pile will gradually reduce the charging current and charge the battery at a constant voltage until the battery is fully charged; finally, when the battery is nearly fully charged, the charging pile will perform trickle charging at a very small current to ensure that the battery is fully charged without overcharging; The efficiency of the charging pile may not be the highest at the beginning of charging, because the battery needs to be pre-charged, but as the charging process proceeds, the efficiency will gradually increase, especially in the constant current charging stage. However, when the battery is close to full, in order to protect the battery, the charging current will decrease, and the efficiency may drop slightly at this time. By setting the detection and confirmation procedures of the charging process and the steps of real-time monitoring of the actual output power of the charging pile during the charging process, the charging efficiency, stability and safety of the charging pile are greatly improved; Get the actual output power at 1-minute intervals Calculate the actual charging output power fluctuation value through the actual output power , if the actual charging output power fluctuation value If the value is small, it means that the charging efficiency of the charging pile is relatively stable at the beginning. If the actual charging output power fluctuates A larger value indicates that the charging efficiency is relatively unstable at the beginning. When , the power monitoring module outputs a signal to detect the noise value.

[0027] The average value in a text collection The specific calculation method is:

[0028] Where N is the number of data points in the text collection, is one of the actual charging power values ​​in the text collection; Specifically, when the charging pile just starts charging, the charging efficiency per minute is obtained, and the average value of the charging efficiency values ​​per adjacent minute is calculated to obtain the average value in the text set. , and by the average Calculate the actual charging output power fluctuation value , to indirectly detect whether the output power of the charging pile is abnormal at the initial stage of charging, and calculate the actual charging output power fluctuation value , to indirectly monitor the changes of the charging pile from the initial charging stage to the constant current charging stage, and can efficiently detect whether there is any charging abnormality in the initial charging process, and take protective measures.

[0029] Based on the power monitoring module receives When the information is received, the power data judgment module is used to judge the noise value. Is it normal? And calculated by the formula:

[0030] in, is the continuous noise value of the charging pile, T is the noise measurement time, and e is the noise value at time t; The maximum noise threshold of the charging pile during charging is preset to ; like , the power monitoring module outputs a signal for detecting the temperature of the charging pile power supply; like , the execution module outputs a signal that the charging pile disconnects charging; When the actual output power of the charging pile during the charging process is abnormal, the charging pile itself can be monitored for noise. If the noise value of the charging pile during the charging process is abnormal, the execution module controls the charging pile to stop charging immediately to avoid possible equipment damage or safety accidents. The staff comes to check whether the charging pile has obvious visible damage, deformation or other conditions. At the same time, warning signs are set up around the charging pile to prevent others from approaching and using the charging pile to avoid danger. Sometimes the noise may be caused by abnormal heat dissipation or excessive dust in the heat dissipation system. At this time, the staff can handle the charging pile and take protective measures in time.

[0031] The execution module is also used to reduce the output power of the charging pile; Based on the power monitoring module receives When the detection information is received, the power monitoring module obtains the temperature of the charging pile power supply ; Pre-set the maximum safe temperature threshold of the charging pile power supply ; like , the execution module outputs a signal to reduce the output power of the charging pile; like , the charging pile is charging normally; Specifically, charging piles are mainly divided into AC and DC charging. DC charging piles are usually more efficient and suitable for fast charging, while AC charging piles are suitable for daily use. Environmental factors such as temperature can affect charging efficiency. When the actual output power of the charging pile is abnormal and the noise value is normal, the temperature of the charging pile power supply needs to be Make a judgment, when When the current temperature of the surface charging power module is abnormal, the execution module can control the charging efficiency of the charging pile to reduce. Under high temperature conditions, the chemical reaction speed inside the battery is accelerated, which may cause the battery to overheat, thereby affecting the performance and life of the battery and reducing the charging efficiency. In extremely high or low temperature environments, the performance of the battery will be affected. Generally, the charging pile will indicate its working environment temperature range, such as If the actual temperature exceeds this range, the charging efficiency will be reduced, and charging needs to be suspended or the charging power needs to be reduced to protect the battery and charging equipment; monitor the operating temperature of the power module to prevent malfunctions or safety hazards caused by overheating; if , it is possible that the charging power shows a small abnormal change in the initial charging stage, and can adaptively change back to normal power. At this time, the charging pile can be charged normally.

[0032] Based on the execution module receiving When the information is displayed, the output power of the charging pile is reduced as follows: Adjust the charging power of the charging pile ; And calculated according to the formula: ; in, The actual output power of the charging pile at present; The estimated adjusted temperature of the charging pile; Temperature when charging the charging station; It is the maximum safe temperature threshold of the charging pile power module.

[0033] Specifically, when the chemical reaction speed inside the battery is accelerated due to high temperature, the battery may be overheated, thereby affecting the performance and life of the battery and reducing the charging efficiency. The charging efficiency needs to be reduced in time. The specific way to reduce the charging efficiency is to reduce the charging current or voltage, thereby reducing the power output; Output voltage and current: The output voltage is usually adjustable to suit different types of electric vehicles; Nominal voltage of electric vehicle battery: This is the voltage of the electric vehicle battery when it is fully charged, usually between 200V and 400V. AC charging piles (slow charging) usually provide a fixed voltage, while DC charging piles (fast charging) usually have a wider voltage output range to suit different models of electric vehicles.

[0034] The operation status detection system further includes an abnormality detection module, which is used to monitor abnormalities of the charging pile cable; After the execution module reduces the output efficiency of the charging pile, the power monitoring module continues to monitor the power temperature of the charging pile as follows: Calculate the current temperature every 30 seconds The maximum safe temperature threshold of the charging pile power module The difference between ; Create a collection text of the temperature difference calculated at 30s intervals ,in The difference is 30s. is the difference at 1min, The difference is 5 minutes; Observe the values ​​in the set text, if the values ​​gradually increase or the values ​​are close, the anomaly detection module outputs a signal for detecting anomalies of the cable; If the value in the set text gradually decreases, the charging pile is charging normally.

[0035] Specifically, after the power of the charging pile is adjusted, the temperature of the charging pile power supply needs to be continuously detected. For example, the temperature of the charging pile power supply is detected at intervals of 30 seconds. If the current temperature is calculated at intervals of 30 seconds and the maximum safe temperature threshold of the power module is The difference between the current temperature and the maximum safe temperature threshold of the power module is gradually reduced, indicating that the measures to adjust the charging efficiency of the charging pile are correct; if the current temperature is calculated every 30 seconds and the maximum safe temperature threshold of the power module is If the difference is close or gradually increases, it means that the temperature cannot be lowered after adjusting the charging efficiency of the charging pile. At this time, a signal is generated and transmitted to the execution module to disconnect the charging pile. It should be noted that the value is close to the difference between adjacent values ​​less than 0.1, that is At this time, it can be shown that the values ​​are close. By real-time monitoring of the adjusted charging power, not only can the charging pile continue to be used, but also the problem of charging at high power and reducing the service life of the charging pile can be avoided. It can also handle the charging problem by itself, creating a safe and efficient charging environment.

[0036] The abnormality detection module is used to monitor the abnormality of the charging pile cable, including: The abnormality detection module includes a visual sensor, which is used to detect whether the surface of the charging pile cable is damaged or has poor contact. If the charging pile cable is damaged or has poor contact, a signal is generated and transmitted to the execution module, and the charging pile is disconnected from charging; Charging pile cable detection: Damage to the charging pile cable, poor contact or excessive length of the cable will reduce charging efficiency; The image of the charging pile cable surface is obtained through the visual sensor and processed. The acquired image will be analyzed by the image processing algorithm to identify signs of damage or poor contact on the cable surface.

[0037] This may include edge detection, texture analysis or other feature recognition technology to identify scratches, cracks, breaks or other forms of damage; If the charging efficiency is lower than expected, you can check and solve the above possible reasons one by one. For example, if it is due to aging or improper maintenance of the charging equipment, you may need to replace parts or perform professional maintenance. If it is due to the mismatch between the charging pile and the vehicle, you may need to replace the appropriate charging pile or use an adapter. If it is due to power supply problems, you need to contact the power supplier to solve it. The abnormality detection module also includes charging pile interface detection, specifically: The abnormality detection module also includes a BMS simulator, and the BMS simulator is used to detect the communication of the vehicle during the charging process; If the communication between the charging pile and the vehicle matches normally, the charging pile will charge normally; If the communication between the charging pile and the vehicle is not properly matched, the charging pile will disconnect the charging.

[0038] Mismatches between the charging pile and the vehicle's charging interface or communication protocol may result in suboptimal charging efficiency. The BMS simulator is a device specifically used to test the performance of the battery management system (BMS). It can simulate various battery states, including voltage, current, temperature and other parameters. By using the BMS simulator, it is possible to detect whether the charging pile matches the vehicle's charging interface and communication protocol. If they do not match, it is necessary to replace the appropriate charging pile or use an adapter.

[0039] The operation steps are as follows: 1. Set simulation parameters: Use the programming software of the BMS simulator to set the voltage, current, temperature and other parameters of the simulated battery to match the BMS interface specifications of the charging pile and vehicle being tested; 2. Communication protocol simulation: The BMS simulator can simulate the communication protocol of the BMS, including CAN, LIN or Ethernet, etc., to ensure that the communication between the charging pile and the vehicle is correct 3. Fault simulation: The BMS simulator can simulate various fault conditions, such as battery cell overvoltage, short circuit, open circuit, etc., to test the fault detection and handling capabilities of the charging pile; 4. Test the charging interface: Connect the BMS simulator to the charging interface of the charging pile and the vehicle, check whether the physical connection is stable, and whether there is any obvious damage or mismatch; 5. Perform functional testing: Send simulated battery status information through the BMS simulator to check whether the charging can respond to this information correctly and execute the corresponding charging strategy. 6. Monitoring and recording: During the test, use the monitoring function of the BMS simulator to record the performance data of the charging pile, including charging current, voltage, temperature, etc., to evaluate whether its performance meets expectations. 7. Analyze the results: After the test is completed, analyze the recorded data to determine if there is a mismatch between the charging and vehicle charging interfaces and communication protocols.

[0040] like Figure 2 As shown: A method for detecting the operating status of a charging pile power module, comprising the following steps: S1. Obtain the actual output power, real-time noise value and real-time temperature of the charging pile power supply during operation through the power supply monitoring module; S2. Determine whether the actual output power of the power supply, the real-time noise value and the real-time temperature of the charging pile power supply are normal through the power supply data judgment module; S3. If the actual output power of the power supply is normal, the charging pile is charging normally. If it is abnormal, the noise value of the charging pile is detected; If the noise value of the charging pile is abnormal, the charging pile will be disconnected from charging. If the noise value of the charging pile is normal, the power supply temperature of the charging pile will be detected. If it is normal, the charging pile will charge normally. If it is abnormal, the charging power of the charging pile will be reduced.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A charging pile power module operation status detection system, characterized in that: include Power supply monitoring module: The power supply monitoring module is used to obtain the data of the charging pile power supply during operation, and the data includes the actual output power of the charging pile power supply, the real-time noise value and the real-time temperature of the charging pile power supply; Power supply data judgment module: The power supply data judgment module is used to judge whether the data of the charging pile power supply during operation is normal; Execution module: The execution module controls the charging and disconnection of the charging pile based on the module information determined according to the power supply data; The power supply data judgment module determines whether the data of the charging pile power supply during operation is normal, specifically: determining whether the actual output power of the charging pile power supply is normal. If it is normal, the charging pile is charged normally. If it is not normal, the noise value of the charging pile is detected; If the noise value of the charging pile is abnormal, the charging pile will be disconnected from charging. If the noise value of the charging pile is normal, the power supply temperature of the charging pile will be detected. If it is normal, the charging pile will charge normally. If it is abnormal, the charging power of the charging pile will be reduced.

2. The operating status detection system of a charging pile power module according to claim 1, characterized in that: The power data judgment module determines whether the actual output power of the charging pile power supply is normal or not. Specifically: The power monitoring module obtains the actual output power of the charging pile during the charging process at intervals of 1 minute. , and create a text collection ;in is the actual output power of the charging pile at the 1st minute, is the actual output power of the charging pile at the 2nd minute, and so on; Calculate the actual charging output power fluctuation value in the text collection ; ； Where N is the number of data points in the text collection; is a set of actual output power values ​​in the text collection; The average value in the text collection; Preset the maximum threshold of fluctuations in the text collection ; like , the charging pile is charging normally; like , the power monitoring module outputs a signal to detect the noise value.

3. The operating status detection system of a charging pile power module according to claim 2, characterized in that: The average value in the text collection The specific calculation method is: Where N is the number of data points in the text collection, is one of the actual output power values ​​in the text collection.

4. The operating status detection system of a charging pile power module according to claim 2, characterized in that: Based on the power monitoring module receives When the information is received, the power data judgment module is used to judge the noise value. Is it normal? And calculated by the formula: in, is the continuous noise value of the charging pile, T is the noise measurement time, and e is the noise value at time t; The maximum noise threshold of the charging pile during charging is preset to ; like , the power monitoring module outputs a signal for detecting the temperature of the charging pile power supply; like , the execution module outputs a signal that the charging pile disconnects charging.

5. The operating status detection system of a charging pile power module according to claim 3, characterized in that: The execution module is also used to reduce the output power of the charging pile; Based on the power monitoring module receives When the detection information is received, the power monitoring module obtains the temperature of the charging pile power supply ; Pre-set the maximum safe temperature threshold of the charging pile power supply ; like , the execution module outputs a signal to reduce the output power of the charging pile; like , the charging pile is charging normally.

6. The operating status detection system of a charging pile power module according to claim 5, characterized in that: Based on the execution module receiving When the information is displayed, the output power of the charging pile is reduced as follows: Adjust the charging power of the charging pile ; And calculated according to the formula: ; in, The actual output power of the charging pile at present; The estimated adjusted temperature of the charging pile; Temperature when charging the charging station; It is the maximum safe temperature threshold of the charging pile power module.

7. The operating status detection system of a charging pile power module according to claim 6, characterized in that: The operation status detection system further includes an abnormality detection module, which is used to monitor abnormalities of the charging pile cable; After the execution module reduces the output efficiency of the charging pile, the power monitoring module continues to monitor the power temperature of the charging pile as follows: Calculate the current temperature every 30 seconds The maximum safe temperature threshold of the charging pile power module The difference between ； Create a collection text of the temperature difference calculated at 30s intervals ,in The difference is 30s. is the difference at 1min, The difference is 5 minutes; Observe the values ​​in the set text, if the values ​​gradually increase or the values ​​are close, the anomaly detection module outputs a signal for detecting anomalies of the cable; If the value in the set text gradually decreases, the charging pile is charging normally.

8. The operating status detection system of a charging pile power module according to claim 5, characterized in that: The abnormality detection module is used to monitor the abnormality of the charging pile cable, including: The abnormality detection module includes a visual sensor, which is used to detect whether the surface of the charging pile cable is damaged or has poor contact. If the charging pile cable is damaged or has poor contact, a signal is generated and transmitted to the execution module, and the charging pile is disconnected from charging.

9. The operating status detection system of a charging pile power module according to claim 5, characterized in that: The abnormality detection module also includes charging pile interface detection, specifically: The abnormality detection module also includes a BMS simulator, and the BMS simulator is used to detect the communication of the vehicle during the charging process; If the communication between the charging pile and the vehicle matches normally, the charging pile will charge normally; If the communication between the charging pile and the vehicle is not properly matched, the charging pile will disconnect the charging.

10. A method for detecting the operating status of a charging pile power module, characterized in that: The following steps are involved: S1. Obtain the actual output power, real-time noise value and real-time temperature of the charging pile power supply during operation through the power supply monitoring module; S2. Determine whether the actual output power of the power supply, the real-time noise value and the real-time temperature of the charging pile power supply are normal through the power supply data judgment module; S3. If the actual output power of the power supply is normal, the charging pile is charging normally. If it is abnormal, the noise value of the charging pile is detected; If the noise value of the charging pile is abnormal, the charging pile will be disconnected from charging. If the noise value of the charging pile is normal, the power supply temperature of the charging pile will be detected. If it is normal, the charging pile will charge normally. If it is abnormal, the charging power of the charging pile will be reduced.

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