Automatic detection method and apparatus for charging fault of charging pile, device and medium

Abstract

The present application discloses an automatic detection method and apparatus for a charging fault of a charging pile, a device and a medium. The automatic detection method for the charging fault of the charging pile comprises: determining whether a charging pile has been successfully connected to a charging vehicle, and in response to the charging pile having not been successfully connected to the charging vehicle, controlling a charging pile power supply positive terminal to send a first signal, and controlling a charging pile power supply negative terminal to send a second signal; determining a third signal received by the charging pile power supply positive terminal and a fourth signal received by the charging pile power supply negative terminal; determining a positive terminal transmission time difference on the basis of the first signal and the third signal, and determining a negative terminal transmission time difference on the basis of the second signal and the fourth signal; and on the basis of the positive terminal transmission time difference, the negative terminal transmission time difference, and resistance measurement information of the charging pile power supply positive terminal and the charging pile power supply negative terminal, determining charging cable fault information of the charging pile.

Description

Automatic detection methods, devices, equipment, and media for charging pile charging faults

[0001] This application claims priority to Chinese Patent Application No. 202411845892.5, filed with the Chinese Patent Office on December 16, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of new energy charging pile technology, such as automatic detection methods, devices, equipment and media for charging pile charging faults. Background Technology

[0003] With the increasing popularity of new energy vehicles, charging piles have also become more widespread, including but not limited to DC charging piles, AC charging piles, and charging stacks. During the charging process, cables account for a significant portion of the equipment's utilization. Furthermore, because charging cables need to carry high voltage and current, cable malfunctions are one of the main causes of charging failures when users use charging piles.

[0004] If users encounter problems such as being unable to charge their new energy vehicles while using charging stations, and cannot accurately determine the specific cause of the charging failure, it can lead to user anxiety and hinder the charging station manufacturer from quickly repairing the fault. Summary of the Invention

[0005] This application provides an automatic detection method, device, equipment, and medium for charging pile charging faults, which solves the problem that users cannot obtain the cause of the charging fault when charging fails. It enables users and charging pile manufacturers to be quickly informed of the specific cause of the charging fault, speeds up the fault resolution time, and improves user satisfaction.

[0006] This application provides an automatic detection method for charging pile charging faults, including: determining whether the charging pile and the charging vehicle are successfully connected; if the charging pile and the charging vehicle are not successfully connected, controlling the positive power port of the charging pile to send a first signal and controlling the negative power port of the charging pile to send a second signal; determining the third signal received by the positive power port of the charging pile and the fourth signal received by the negative power port of the charging pile; determining the transmission time difference of the positive port based on the first signal and the third signal, and determining the transmission time difference of the negative port based on the second signal and the fourth signal; determining the charging cable fault information of the charging pile based on the transmission time difference of the positive port, the transmission time difference of the negative port, and the resistance measurement information of the positive power port and the negative power port of the charging pile.

[0007] This application provides an automatic detection device for charging pile charging faults, comprising: a charging pile signal transmitting module, configured to determine whether the charging pile and the charging vehicle are successfully connected; if the charging pile and the charging vehicle are not successfully connected, controlling the positive power port of the charging pile to send a first signal and controlling the negative power port of the charging pile to send a second signal; a charging pile signal receiving module, configured to determine the third signal received by the positive power port of the charging pile and the fourth signal received by the negative power port of the charging pile; a transmission time difference determining module, configured to determine the transmission time difference of the positive port based on the first signal and the third signal, and to determine the transmission time difference of the negative port based on the second signal and the fourth signal; and a first charging cable fault determining module, configured to determine the charging cable fault information of the charging pile based on the transmission time difference of the positive port, the transmission time difference of the negative port, and the resistance measurement information of the positive power port and the negative power port of the charging pile.

[0008] This application provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the above-described automatic detection method for charging pile charging faults.

[0009] This application provides a computer-readable storage medium storing computer instructions, which are used to cause a processor to execute the above-described automatic detection method for charging pile charging faults. Attached Figure Description

[0010] Figure 1 is a flowchart of an automatic detection method for charging pile charging faults provided in Embodiment 1 of this application;

[0011] Figure 2 is a flowchart of another automatic detection method for charging pile charging faults provided in Embodiment 2 of this application;

[0012] Figure 3 is a timing diagram showing the normal detection result of a charging cable for a charging pile according to Embodiment 2 of this application.

[0013] Figure 4 is a timing diagram of a fault detection result of a charging cable in a charging pile provided in Embodiment 2 of this application;

[0014] Figure 5 is a flowchart of another automatic detection method for charging pile charging faults provided in Embodiment 3 of this application;

[0015] Figure 6 is a timing diagram of a fault detection result of a charging cable for a charging vehicle provided in Embodiment 3 of this application;

[0016] Figure 7 is a flowchart of another automatic detection method for charging pile charging faults provided in Embodiment 4 of this application;

[0017] Figure 8 is a flowchart of another automatic detection method for charging pile charging faults provided in Embodiment 5 of this application;

[0018] Figure 9 is a schematic diagram of the structure of an automatic detection device for charging pile charging faults provided in Embodiment 6 of this application;

[0019] Figure 10 is a schematic diagram of the structure of an electronic device for implementing an automatic detection method for charging pile charging faults, provided in Embodiment 7 of this application. Detailed Implementation

[0020] The terms “candidate,” “target,” etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion, for example, including, in addition to processes, methods, systems, products, or devices that include the series of steps or units shown in the embodiments of this application, other processes, methods, systems, products, and devices that are not explicitly listed in this series of steps or units, or other steps or units inherent to these processes, methods, systems, products, or devices.

[0021] Example 1

[0022] Figure 1 is a flowchart of an automatic detection method for charging pile charging faults provided in Embodiment 1 of this application. This embodiment is applicable to troubleshooting charging faults that prevent charging of new energy vehicles when using charging piles. This method can be executed by an automatic detection device for charging pile charging faults, which can be implemented in hardware and / or software and can be configured in the charging pile. As shown in Figure 1, the method includes:

[0023] S110. Determine whether the charging pile and the charging vehicle are successfully connected. If the charging pile and the charging vehicle are not successfully connected, control the positive power port of the charging pile to send a first signal and control the negative power port of the charging pile to send a second signal.

[0024] When a vehicle is charging using a charging station, a connection check is first performed to determine whether the charging station is already connected to the vehicle. If a handshake signal is generated, it means that the charging station and the vehicle are successfully connected; if no handshake signal is generated within a preset time interval, it means that the charging station and the vehicle are not successfully connected.

[0025] If the charging station fails to connect to the vehicle, it indicates a high probability of a charging station malfunction. The first step is to inspect the charging cables inside the charging station. The charging cables may have broken points. Therefore, the length of the internal cables is measured by sending a cable length measurement signal from the charging station's power port. Based on this measurement, the location of the charging cable fault can be determined.

[0026] Since each charging pile signal port is connected internally via a cable, each port sends a separate cable length measurement signal. Each charging pile signal port includes at least a positive power port and a negative power port. The first and second signals are identical to ensure consistency in the received signals from both ports, enabling comparison between the positive and negative power ports. The content of the first and second signals can be determined based on actual conditions; for example, they can be pulse wave signals, which offer high recognizability, ease of generation, and improved signal transmission efficiency.

[0027] S120. Determine the third signal received at the positive port of the charging pile power supply and the fourth signal received at the negative port of the charging pile power supply.

[0028] The charging pile's positive power port sends a first signal and receives the echo of the first signal; the received signal is the third signal. Similarly, the charging pile's negative power port sends a second signal and receives the echo of the second signal; the received signal is the fourth signal.

[0029] Since the signals sent by the charging pile signal port are transmitted through the charging cable, the first signal sent by the positive power port of the charging pile and the third signal received are transmitted back and forth through the charging cable corresponding to the positive power port of the charging pile, and the second signal sent by the negative power port of the charging pile and the fourth signal received are transmitted back and forth through the charging cable corresponding to the negative power port of the charging pile.

[0030] S130. Determine the transmission time difference of the positive port based on the first signal and the third signal, and determine the transmission time difference of the negative port based on the second signal and the fourth signal.

[0031] Since the signals sent and received by the charging pile signal port are transmitted back and forth through the charging cable, the transmission time difference determined by each port can reflect the corresponding charging cable length information.

[0032] The positive port transmission time difference is determined based on the time difference between the start time of the first signal transmission and the start time of the third signal reception. This positive port transmission time difference reflects the length of the round-trip transmission through the charging cable corresponding to the positive port of the charging pile power supply. Similarly, the negative port transmission time difference is determined based on the time difference between the start time of the second signal transmission and the start time of the fourth signal reception. This negative port transmission time difference reflects the length of the round-trip transmission through the charging cable corresponding to the negative port of the charging pile power supply. Alternatively, the positive port transmission time difference can be determined based on the time difference between the end time of the first signal transmission and the end time of the third signal reception, and the negative port transmission time difference can be determined based on the time difference between the end time of the second signal transmission and the end time of the fourth signal reception.

[0033] S140. Determine the charging cable fault information of the charging pile based on the transmission time difference of the positive port, the transmission time difference of the negative port, and the resistance measurement information of the positive port and the negative port of the charging pile power supply.

[0034] By comparing the transmission time difference between the positive and negative ports, it can be determined whether the charging cable at any of these ports is faulty; that is, a preliminary judgment can be made based on the transmission time difference. For example, if the transmission time difference between the positive and negative ports is the same, then the charging cables at both ports are determined to be fault-free; if the transmission time difference between the positive and negative ports is different, then the charging cable corresponding to the port with the smaller transmission time difference may be faulty.

[0035] Since the resistance of a charging cable is directly proportional to its length, after determining the faulty port based on the transmission time difference between the positive and negative ports, the ratio of the resistance measurement information of the normal port to that of the faulty port is the same as the ratio of the cable length of the normal port to that of the faulty port. The cable length of the normal port can be determined based on the factory information of the charging pile. The cable length of the faulty port can be determined based on the logical relationship between cable resistance and cable length. Based on this cable length, the location of the cable break point on that port can be determined. Based on the location of the break point, charging cable fault information is generated to alert the user that the charging pile is faulty, so that the user can replace the charging pile in time. It can also prompt the charging pile manufacturer to quickly troubleshoot the cable of the faulty port, improving the charging pile repair efficiency.

[0036] The technical solution of this application embodiment determines whether the current charging pile is connected to the charging vehicle. If the charging pile and the charging vehicle are not connected, it proves that the charging pile and the charging vehicle have not performed a handshake. Then, the faulty cable is determined according to the transmission time difference of the signal sent and received signals from different charging pile signal ports. The cable length is automatically detected according to the logical relationship between the measured resistance of the charging pile signal port and the corresponding cable length. This solves the problem of low troubleshooting efficiency when the charging connection fails. It achieves the effect of quickly informing users and charging pile manufacturers of the specific cause of the charging failure, speeding up the fault resolution time, and improving user satisfaction.

[0037] Example 2

[0038] Figure 2 is a flowchart of an automatic detection method for charging pile charging faults provided in Embodiment 2 of this application. This embodiment describes step 140 in the above embodiment, that is, further explains the process of determining charging cable fault information. As shown in Figure 2, the method includes:

[0039] S210. Determine whether the charging pile and the charging vehicle are successfully connected. If the charging pile and the charging vehicle are not successfully connected, control the positive power port of the charging pile to send a first signal and control the negative power port of the charging pile to send a second signal.

[0040] S220. Determine the third signal received at the positive port of the charging pile power supply and the fourth signal received at the negative port of the charging pile power supply.

[0041] S230. Determine the transmission time difference of the positive port based on the first signal and the third signal, and determine the transmission time difference of the negative port based on the second signal and the fourth signal.

[0042] In one embodiment, the first signal and the second signal are pulse wave signals, the pulse wave signals include at least two pulse waves, and the level values ​​and high-level time intervals of the at least two pulse waves are different;

[0043] Accordingly, S230 includes: determining a first transmission time difference for the positive port based on the rising edge of the starting pulse wave in the first signal and the rising edge of the starting pulse wave in the third signal; determining a second transmission time difference for the positive port based on the falling edge of the ending pulse wave in the first signal and the falling edge of the ending pulse wave in the third signal; determining a third transmission time difference for the negative port based on the rising edge of the starting pulse wave in the second signal and the rising edge of the starting pulse wave in the fourth signal; and determining a fourth transmission time difference for the negative port based on the falling edge of the ending pulse wave in the second signal and the falling edge of the ending pulse wave in the fourth signal.

[0044] To increase the complexity of the signals transmitted by the charging pile signal port, avoid external interference, improve the accuracy of signal discrimination based on received signals, and ensure the ease of signal generation to enhance transmission accuracy and efficiency, this embodiment employs multiple pulse waves as the signals transmitted by the charging pile signal port, with each pulse wave having a different high-level value and high-level time interval. For example, the first signal and the second signal are pulse wave signals comprising two pulse waves, wherein the level value of the first pulse wave is lower than the level value of the second pulse wave, and the high-level duration of the first pulse wave is shorter than that of the second pulse wave.

[0045] Similarly, in order to improve the accuracy of the measurement results of the charging cable length determined based on the transmission time difference, multiple transmission time differences are determined based on multiple pulse waves in the first and second signals. That is, the transmission time difference of the positive port includes multiple transmission time differences determined based on the corresponding pulse waves in the transmitted and received signals, and the transmission time difference of the negative port includes multiple transmission time differences determined based on the corresponding pulse waves in the transmitted and received signals.

[0046] For example, taking the aforementioned first and second signals as pulse wave signals comprising two pulse waves, the positive port of the charging pile power supply sends a pulse wave signal, i.e., the first signal, and receives a returned pulse wave signal, i.e., the third signal, after a certain period of time. The waveforms of the first and third signals are consistent. The positive port of the charging pile power supply calculates the pulse wave signal level based on the rising edge of the starting signal, which has a lower level and a shorter high-level time interval. The time points corresponding to the rising edges of the starting pulse waves are found in both the first and third signals, and the first transmission time difference is determined as ΔT1 based on the difference between the two time points. The positive port of the charging pile power supply calculates the pulse wave signal level based on the falling edge of the ending signal, which has a higher level and a longer high-level time interval. The time points corresponding to the falling edges of the ending pulse waves are found in both the first and third signals, and the first transmission time difference is determined as ΔT2 based on the difference between the two time points.

[0047] The charging pile's negative power port sends a pulse wave signal, the second signal, and receives a returned pulse wave signal, the fourth signal, after a certain interval. The waveforms of the second and fourth signals are consistent. The charging pile's negative power port uses the rising edge of the initial signal as the starting point; the corresponding pulse wave signal level is low and the high-level interval is short. The time points corresponding to the rising edges of the starting pulse waves in both the second and fourth signals are found, and the difference between these two time points is used to determine the third transmission time difference as ΔT3. Similarly, the charging pile's negative power port uses the falling edge of the ending signal as the ending point; the corresponding pulse wave signal level is high and the high-level interval is long. The time points corresponding to the falling edges of the ending pulse waves in both the second and fourth signals are found, and the difference between these two time points is used to determine the fourth transmission time difference as ΔT4.

[0048] S240. Based on the matching results of the transmission time difference of the positive port and the transmission time difference of the negative port with the transmission time difference of the normal charging pile, the faulty port is determined.

[0049] The normal transmission time difference of a charging pile is affected by the length of the cable inside the charging pile. It can be predetermined based on the charging pile's configuration information at the factory, or determined by sending a corresponding pulse wave signal through the charging pile's signal port during normal operation. The normal transmission time difference can be defined as a range within which it can be considered normal. If a cable malfunctions, the signal sent by the charging pile's signal port will return after not transmitting the required length, resulting in a transmission time difference shorter than the normal charging pile transmission time difference.

[0050] Therefore, the transmission time difference of the positive port is compared with the transmission time difference of a normal charging pile. If the difference is less than or equal to a preset threshold, the positive port transmission time difference is determined to be normal, meaning the cable length transmitted by the first signal is normal, and the positive port of the charging pile is a normal port. If the difference is greater than the preset threshold, the positive port transmission time difference is determined to be abnormal, meaning the cable length transmitted by the first signal is abnormal, and the positive port of the charging pile is a faulty port. Similarly, the transmission time difference of the negative port is judged to determine whether the negative port of the charging pile is a normal port or a faulty port.

[0051] For example, if the transmission time difference at the positive port includes a first transmission time difference and a second transmission time difference, and the difference between either the first or second transmission time difference and the normal transmission time difference of the charging pile is greater than a preset difference threshold, then the transmission time difference at the positive port is determined to be abnormal, and the positive port of the charging pile is a faulty port. If the difference between either the first or second transmission time difference and the normal transmission time difference of the charging pile is less than or equal to the preset difference threshold, then the transmission time difference at the positive port is determined to be normal, and the positive port of the charging pile is a normal port. Similarly, if the transmission time difference at the negative port includes a third and a fourth transmission time difference, and the difference between either the third or fourth transmission time difference and the normal transmission time difference of the charging pile is greater than a preset difference threshold, then the transmission time difference at the negative port is determined to be abnormal, and the negative port of the charging pile is a faulty port. Figure 3 shows the timing diagram corresponding to the normal test result of the charging cable of the charging pile. The clock signal provides the clock signal to the first signal and the second signal. ΔT1, ΔT2, ΔT3 and ΔT4 are normal, which confirms that the cable length is normal.

[0052] S250. Determine the resistance prediction information of the faulty port based on the transmission time difference of the faulty port, the transmission time difference of the normal charging pile, the cable length of the normal charging pile, and the port resistance of the normal charging pile cable.

[0053] The normal charging pile cable length and normal charging pile cable port resistance can be determined based on the charging pile's factory configuration information. For example, the normal charging pile cable port resistance can be determined based on the resistance measurement information of the ports identified as normal. If there are no normal ports among the identified ports, the resistance can be determined based on the charging pile's factory configuration information.

[0054] Based on the logical relationship between cable resistance and cable length, it can be determined that the ratio of the resistance of the faulty port to the resistance of the normal port is the same as the ratio of the cable length of the faulty port to the cable length of the normal port. Similarly, based on the logical relationship between transmission time difference and cable length, the ratio of the transmission time difference of the faulty port to the transmission time difference of the normal charging station is the same as the ratio of the cable length of the faulty port to the cable length of the normal charging station. Therefore, based on the above logical relationships, the cable length of the faulty port can be determined using the transmission time difference of the faulty port, the transmission time difference of the normal charging station, and the cable length of the normal charging station. Then, based on the cable length of the faulty port, the cable length of the normal charging station, and the resistance of the normal charging station cable port, the resistance prediction information of the faulty port can be determined.

[0055] S260. Determine the charging cable fault information based on the resistance measurement information and resistance prediction information of the fault port.

[0056] Since the resistance prediction information for the faulty port is determined based on the transmission time difference of the faulty port, the transmission time difference of the normal charging pile, the cable length of the normal charging pile, and the cable port resistance of the normal charging pile, this is based on the assumption that the cable length of the faulty port is abnormal. Therefore, if the actual resistance measurement information and the resistance prediction information of the faulty port are the same, the aforementioned premise verification is confirmed to be correct, meaning the cable length of the faulty port is correctly determined. A charging cable fault information is then generated based on the cable length of the faulty port to alert the user to the charging pile malfunction and to inform the charging pile manufacturer of the fault location. If the actual resistance measurement information and the resistance prediction information of the faulty port are different, the aforementioned premise verification is confirmed to be incorrect, meaning the cable length of the faulty port is incorrect. In this case, a new charging cable fault information is generated, such as an unclear fault, awaiting verification by staff.

[0057] In one embodiment, S250 includes: determining the predicted break point location of the faulty port cable based on the transmission time difference of the faulty port, the transmission time difference of the normal charging pile, and the length of the normal charging pile cable; determining the resistance prediction information of the faulty port based on the predicted break point location, the length of the normal charging pile cable, and the port resistance of the normal charging pile cable; correspondingly, determining the charging cable fault information based on the resistance measurement information and the resistance prediction information of the faulty port, including: if the resistance measurement information and the resistance prediction information of the faulty port are the same, then generating the charging cable fault information based on the predicted break point location of the faulty port cable.

[0058] Because signal transmission on cables is bidirectional, the ratio of the normal charging pile cable length to the predicted break point location of the faulty port cable is equal to half the ratio of the normal charging pile transmission time difference to the faulty port transmission time difference. Based on this relationship, the predicted break point location of the faulty port cable is determined using the faulty port transmission time difference, the normal charging pile transmission time difference, and the normal charging pile cable length. Similarly, the ratio of the normal charging pile cable length to the predicted break point location of the faulty port cable is equal to the ratio of the normal charging pile cable port resistance to the predicted resistance information of the faulty port. Based on this relationship, the predicted resistance information of the faulty port is determined using the predicted break point location, the normal charging pile cable length, and the normal charging pile cable port resistance. The normal charging pile transmission time difference can be determined based on the transmission time difference of the normal port, and the normal charging pile cable port resistance can be determined based on the resistance measurement information of the normal port. If there is no normal port, it can be determined based on the charging pile's factory configuration information.

[0059] For example, as shown in Figure 4, the timing diagram corresponding to the fault of the charging cable detection result of the charging pile is shown. The Clock signal sends a clock signal to the first signal and the second signal. ΔT1 and ΔT2 are both within the normal range, while ΔT3 and ΔT4 are both less than the normal range. The faulty port is the negative power port of the charging pile, that is, there is a suspected break point problem at the negative power port of the charging pile. Under normal circumstances, the normal charging pile cable lengths for the positive (DC+) and negative (DC-) power ports are assumed to be HH, and the corresponding normal charging pile cable port resistances when the cable lengths are normal are assumed to be RT. Since the transmission time difference of the DC+ port is normal, the DC+ port resistance is assumed to be RTDC+ = RT. At this time, the resistance information of the DC- port is detected, i.e., the resistance measurement information of the faulty port is RT1DC-. The preliminary judgment of the predicted break point location of the DC- port cable is HHDC- = ΔT3 / ΔT1 / 2*HH. The predicted resistance information of the faulty port is RT2DC- = HHDC- / HH*RT. If the resistance measurement information and the predicted resistance information of the faulty port are the same, it proves that the predicted break point location of the DC- cable has indeed caused a fault. Based on the predicted break point location of the faulty port cable, charging cable fault information is generated and reported.

[0060] The technical solution of this application embodiment determines the resistance prediction information of the fault port by means of the logical relationship between the transmission time difference, cable length and resistance, and then determines the charging cable fault information based on the resistance measurement information and resistance prediction information of the fault port, thereby improving the accuracy of the determination of the charging cable fault information and thus speeding up the fault resolution time.

[0061] Example 3

[0062] Figure 5 is a flowchart of another automatic detection method for charging pile charging faults provided in Embodiment 3 of this application. This embodiment describes the fault detection method after the charging pile and the charging vehicle are successfully connected in the above embodiments. As shown in Figure 5, the method includes:

[0063] S510. Determine whether the charging pile and the charging vehicle are successfully connected. If the charging pile and the charging vehicle are successfully connected, control at least two charging pile signal ports to send the first vehicle cable measurement signal, and determine the second vehicle cable measurement signal received by each charging pile signal port.

[0064] If the charging pile connects successfully to the charging vehicle, it proves that there is no problem with the charging cable inside the charging pile, and there is no need to measure the length of the charging cable. At this time, the reason for the charging failure is most likely caused by the charging vehicle. Therefore, the vehicle cable length should be checked first. If the charging failure occurs later, the fault information can be determined directly based on the pre-detected vehicle cable length test results.

[0065] During vehicle cable length detection, a first vehicle cable measurement signal is sent from at least two charging pile signal ports, and the received second vehicle cable measurement signal is determined. The charging pile signal ports include at least two of the following: charging pile power positive port (DC+), charging pile power negative port (DC-), charging pile CAN-H port (S+), charging CAN-L port (S-), low-voltage control power positive port (A+), low-voltage control power negative port (A-), ground port (PE), charging pile connection confirmation port (CC1), and vehicle connection confirmation port (CC2). The waveform of the first vehicle cable measurement signal is the same as the first signal in the above embodiment. For example, if the charging pile is successfully connected to the charging vehicle, the charging pile power positive port sends a positive first vehicle cable measurement signal, the charging pile power negative port sends a negative first vehicle cable measurement signal, and the positive second vehicle cable measurement signal received by the charging pile power positive port and the negative second vehicle cable measurement signal received by the charging pile power negative port are determined.

[0066] For example, after a user inserts the charging gun into the charging vehicle, a physical connection signal is generated. After the charging pile confirms the handshake and the physical connection is established, the charging module of the charging pile does not output energy at this time. Cable length detection is performed first to determine the length of the cable inside the charging vehicle. The length of the charging cable is determined by the transmission time difference between the signals sent and received at the charging pile's signal port.

[0067] S520. Determine the vehicle cable measurement transmission time difference based on the first vehicle cable measurement signal and the second vehicle cable measurement signal, and determine the vehicle cable measurement length corresponding to the charging pile signal port based on the vehicle cable measurement transmission time difference.

[0068] Since the charging pile and the charging vehicle are successfully connected, the transmission time difference and cable length information of the charging cable inside the charging pile are predetermined, such as the normal charging pile transmission time difference and normal charging pile cable length in the above embodiment. According to the logical relationship between the transmission time difference and the cable length, it can be determined that the ratio of the vehicle cable measurement transmission time difference at the charging pile signal port to the normal charging pile transmission time difference is the same as the ratio of the total cable measurement length at the charging pile signal port to the normal charging pile cable length. According to this logical relationship, the total cable measurement length corresponding to the charging pile signal port can be determined based on the vehicle cable measurement transmission time difference, the normal charging pile transmission time difference, and the normal charging pile cable length. Since the vehicle and the charging pile are successfully connected at this time, the distance transmitted by the first vehicle cable measurement signal and the second vehicle cable measurement signal is the charging cable of the charging pile combined with the vehicle cable of the charging vehicle. Therefore, the cable length obtained according to the above logical relationship is the sum of the charging cable of the charging pile and the vehicle cable of the charging vehicle. Subtracting the normal charging pile cable length from the total cable measurement length gives the vehicle cable measurement length corresponding to the charging pile signal port.

[0069] For example, the first vehicle cable measurement signal can be a pulse wave signal composed of multiple pulse waves, just like the first signal, and the high level value and high level time interval of each pulse wave are different. Correspondingly, there are also multiple vehicle cable measurement transmission time differences. Referring to the determination of the first transmission time difference and the second transmission time difference in the above embodiment, which will not be repeated here, the vehicle cable measurement length corresponding to the charging pile signal port can be determined in multiple ways based on the multiple transmission time differences. The average value of the vehicle cable measurement lengths calculated based on the multiple transmission time differences is used as the final determined vehicle cable measurement length.

[0070] In one feasible embodiment, S520 includes: determining the normal charging pile transmission time difference; and determining the vehicle cable measurement length corresponding to the charging pile signal port based on the normal charging pile transmission time difference, the vehicle cable measurement transmission time difference, and the normal charging pile cable length.

[0071] Based on the logical relationship between transmission time difference and cable length, it can be determined that the ratio of the vehicle cable measurement transmission time difference at the charging pile signal port to the normal charging pile transmission time difference is the same as the ratio of the total cable measurement length at the charging pile signal port to the normal charging pile cable length. According to this logical relationship, the total cable measurement length corresponding to the charging pile signal port can be determined based on the vehicle cable measurement transmission time difference, the normal charging pile transmission time difference, and the normal charging pile cable length. Subtracting the normal charging pile cable length from the total cable measurement length will give the vehicle cable measurement length corresponding to the charging pile signal port.

[0072] S530. Determine the charging cable fault information based on the measured length of the vehicle cable corresponding to each charging pile signal port, the resistance of the normal charging pile cable port, and the resistance measurement information of each charging pile signal port.

[0073] Since the vehicle and the charging pile are successfully connected at this time, the distance transmitted by the first vehicle cable measurement signal and the second vehicle cable measurement signal is the combination of the charging pile's charging cable and the charging vehicle's cable. Therefore, under normal circumstances, the resistance measurement information of the charging pile signal port should be the sum of the charging pile cable port resistance and the charging vehicle cable resistance. The charging pile cable port resistance can be determined based on the pre-determined normal charging pile cable port resistance.

[0074] The logical relationship between cable length and resistance is determined. Then, based on the measured length of the vehicle cable corresponding to the charging pile signal port, the resistance of the normal charging pile cable port, and the resistance measurement information of the charging pile signal port, it is determined whether there is a break in the vehicle charging cable. If there is a break in the vehicle charging cable, charging cable fault information is generated based on the vehicle charging cable break information.

[0075] In one embodiment, S530 includes: determining a faulty port and a normal port from at least two charging pile signal ports based on a comparison result between the measured length of the vehicle cable corresponding to each charging pile signal port and the corresponding historical measured normal length of the vehicle cable; determining vehicle cable attribute parameters based on the resistance measurement information of the normal port, the resistance of the normal charging pile cable port, and the measured length of the vehicle cable corresponding to the normal port; determining the location of a first predicted break point of the faulty port in the vehicle cable based on the resistance measurement information of the faulty port, the resistance of the normal charging pile cable port, and the vehicle cable attribute parameters; and generating charging cable fault information based on the location of the first predicted break point and the measured length of the vehicle cable. In this embodiment, determining the faulty port and the normal port from at least two charging pile signal ports can be achieved in two different scenarios. One scenario is to perform periodic self-checks on all charging pile signal ports. If a charging pile signal port has a problem, it is marked as a faulty port; if it has no problem, it is marked as a normal port. The other scenario is to detect the currently used charging pile signal port when the user uses it. If the charging pile signal port has a problem, it is marked as a faulty port; if it has no problem, it is marked as a normal port.

[0076] Historical measurements of normal vehicle cable lengths are compiled based on historical measurement data from successfully charged vehicles. During the handshake process between the charging vehicle and the charging station, the charging station obtains vehicle information, such as vehicle brand and model. Based on this vehicle information and the measured normal cable lengths, a table is created. For the same vehicle model, the internal cable lengths are identical for new energy vehicles. For example, before each charging session, the charging station performs a cable length check to obtain the internal cable lengths of the vehicle. If charging is successful at this time, the charging path is considered unobstructed, and the internal cable lengths are recorded using the vehicle brand, vehicle model, and signal port name, as shown in the table below.

[0077] Table 1

[0078] Based on the charging pile signal port and vehicle information, the system retrieves the corresponding historical normal length of the vehicle cable from a pre-stored table. If the difference between the measured length of the vehicle cable corresponding to the current charging pile signal port and the historical normal length is less than or equal to a preset length threshold, the charging pile signal port is determined to be a normal port. If the difference between the measured length of the vehicle cable corresponding to the current charging pile signal port and the historical normal length is greater than the preset length threshold, the charging pile signal port is determined to be a faulty port. As shown in Table 1, DC+ represents a normal port, and DC- represents an abnormal port.

[0079] Since the charging pile and the charging vehicle are successfully connected at this time, the resistance measurement information of the charging pile signal port = resistance of the charging pile charging cable + resistance of the charging vehicle cable = normal charging pile cable port resistance + ρ*H / A, where H represents the length of the normal charging vehicle charging cable (unit: meters m), ρ is the resistivity of the cable conductor (unit: ohms·meters Ω·m), and A is the cross-sectional area of ​​the cable (unit: square meters m^2).

[0080] Based on the above logical relationship, the vehicle cable attribute parameter value is determined according to the resistance measurement information of the normal port, the resistance of the normal charging pile cable port, and the measured length of the vehicle cable corresponding to the normal port. The vehicle cable attribute parameter is ρ / A, and this vehicle cable attribute parameter is a fixed attribute value. For example, RT1DC+=RT+ρ*H13 / A, where RT1DC represents the resistance measurement information of the positive port of the charging pile power supply, RT is the resistance of the normal charging pile cable port, and H13 is the measured length of the vehicle cable corresponding to the positive port of the charging pile power supply obtained above.

[0081] After determining the vehicle cable attribute parameter values, based on the above logical relationship, and according to the resistance measurement information of the faulty port, the resistance of the normal charging pile cable port, and the vehicle cable attribute parameters, the location of the first predicted break point of the faulty port in the vehicle cable is determined. For example, RT1DC-=RT+ρ*H14a / A, where RT1DC- represents the resistance measurement information of the negative terminal of the charging pile power supply. This resistance measurement information includes the resistance value corresponding to the total length of the charging pile cable and the internal length of the charging vehicle. RT is the resistance of the normal charging pile cable port. Since the charging pile and the charging vehicle are successfully connected at this time, the length of the charging pile cable is considered normal. H14a is the location of the first predicted break point of the faulty port in the vehicle cable.

[0082] If the first predicted break point location of the faulty port in the vehicle cable is the same as the previously determined measured length of the vehicle cable, then charging cable fault information is generated based on the first predicted break point location; if the first predicted break point location of the faulty port in the vehicle cable is not the same as the previously determined measured length of the vehicle cable, then the charging cable fault information is re-determined.

[0083] Figure 6 shows the timing diagram corresponding to the fault in the charging cable detection result of the charging vehicle. ΔT5 and ΔT6 are both within the normal range, while ΔT7 and ΔT8 are both less than the normal range. Therefore, DC+ is determined to be the normal port, and DC- is the abnormal port. The second predicted break point location of the faulty port is obtained based on the measured transmission time difference of the vehicle cable at the normal port and the abnormal port, the length of the normal charging pile cable, and the measured length of the vehicle cable corresponding to the normal port. If the first predicted break point location is the same as the second predicted break point location, charging cable fault information is generated based on the first predicted break point location; if the first predicted break point location is different from the second predicted break point location, the charging cable fault information is re-determined. For example, HH+H14b=ΔT7 / ΔT5 / 2*(HH+H13), where H14b is the second predicted break point location, ΔT7 is the measured transmission time difference of the vehicle cable at the abnormal port, ΔT5 is the measured transmission time difference of the vehicle cable at the normal port, and H13 is the measured length of the vehicle cable corresponding to the normal port.

[0084] The technical solution of this application embodiment determines whether the current charging pile is connected to the charging vehicle. If the connection proves that the charging pile and the charging vehicle have successfully connected, the vehicle cable length is determined based on the transmission time difference between the signal sent and received signals at different charging pile signal ports. The cable length is then reconfirmed based on the logical relationship between the measured resistance of the charging pile signal port and the corresponding cable length. This ensures the accuracy of charging cable fault information, solves the problem of low troubleshooting efficiency when the charging connection fails, and achieves the effect of quickly informing users and charging pile manufacturers of the specific cause of the charging fault, speeding up the fault resolution time, and improving user satisfaction.

[0085] The technical solution of this application embodiment determines whether the current charging pile is connected to the charging vehicle. If the charging pile and the charging vehicle are not connected, it proves that the charging pile and the charging vehicle have not completed a handshake, and then the charging cable inside the charging pile is automatically detected. If the charging pile and the charging vehicle are connected, it proves that the handshake between the charging pile and the charging vehicle has been successful. Then, by analyzing the overall charging circuit of the internal cables of the charging pile and the charging vehicle, the problem point in the physical path of the fault is determined. This allows users and charging pile manufacturers to quickly understand the reason for the inability to charge, speeds up the problem resolution time, and improves customer satisfaction.

[0086] Example 4

[0087] Figure 7 is a flowchart of an automatic detection method for charging pile charging faults provided in Embodiment 4 of this application. This embodiment performs a pre-inspection before determining the charging cable fault information in the above embodiments, thereby improving detection efficiency. As shown in Figure 7, the method includes:

[0088] S710 controls the charging pile to send a charging pile link measurement signal to the charging gun socket port.

[0089] First, the charging pile terminal actively sends a charging pile link measurement signal to the charging gun socket port to predict the internal cable links of the charging pile. The charging pile link measurement signal can be a pulse wave signal, which can be determined based on the waveform of the first signal.

[0090] S720. If the charging gun socket port receives the charging pile link measurement signal, the charging gun socket port sends a response signal to the charging pile and a vehicle link measurement signal to the charging vehicle, and determines the vehicle cable measurement length based on the received vehicle link measurement signal.

[0091] If the charging gun socket port receives the charging pile link measurement signal, it proves that the internal link of the charging pile is normal. Then the charging gun socket port responds to the charging pile, informing it that the cable link between the charging pile and the charging gun socket is unobstructed.

[0092] Meanwhile, the charging gun socket port sends a vehicle link measurement signal to the charging vehicle. The vehicle cable measurement length is determined based on the received vehicle link measurement signal. The determination method can be referred to the above embodiment, and will not be repeated here.

[0093] The vehicle link measurement signal is a pulse wave signal, which can be determined based on the waveform of the first vehicle cable measurement signal.

[0094] S730. If the charging gun socket port does not receive the charging pile link measurement signal, then continue to control the charging pile power positive port to send the first signal and control the charging pile power negative port to send the second signal to determine the charging pile charging cable fault information.

[0095] If the charging gun socket port does not receive the charging pile link measurement signal, it indicates a fault in the internal link of the charging pile. In this case, the system controls the positive power port of the charging pile to send a first signal and the negative power port of the charging pile to send a second signal to determine the charging cable fault information. The fault information is then determined based on the echo signals of the first and second signals. The determination process can be referred to the above embodiment and will not be repeated here.

[0096] The technical solution of this application embodiment identifies pulse wave signals from the charging pile through the charging gun socket port, and responds to the charging pile to determine the continuity of the link between the charging pile and the charging gun socket port; and sends pulse wave signals from the charging gun socket port to the charging vehicle to determine whether the cable length in the charging vehicle is normal. The pulse wave signal output from the charging pile attenuates more with longer cables. By using the charging gun socket port as an intermediate port in this application embodiment, pulse wave signal attenuation can be reduced, while improving the accuracy of cable length measurement. Furthermore, the pre-inspection operation of this application embodiment improves the efficiency of determining the continuity of the internal link of the charging pile.

[0097] Example 5

[0098] Figure 8 is a flowchart of an automatic detection method for charging pile charging faults provided in Embodiment 5 of this application. This embodiment performs a pre-inspection before determining the charging cable fault information in the above embodiments, thereby improving detection efficiency. As shown in Figure 8, the method includes:

[0099] S810 controls the charging gun socket port to send charging pile link measurement signals to the charging pile and to send vehicle link measurement signals to the charging vehicle.

[0100] The system actively sends charging pile link measurement signals to the charging pile and simultaneously sends vehicle link measurement signals to the charging vehicle to improve detection efficiency. Both the charging pile link measurement signals and the vehicle link measurement signals are pulse wave signals.

[0101] S820. Determine the vehicle cable measurement length based on the received signal of the vehicle link measurement signal.

[0102] The vehicle cable measurement length is determined based on the received signal of the vehicle link measurement signal. The determination method can be referred to the above embodiment, and will not be repeated here.

[0103] S830. If the charging gun socket port receives the charging pile link measurement response signal sent by the charging pile, it is determined that the internal cable link of the charging pile is normal.

[0104] If the charging pile receives the charging pile link measurement signal, it proves that the internal link of the charging pile is normal. Then the charging pile sends a charging pile link measurement response signal to the charging gun socket port to confirm that the internal cable link of the charging pile is normal.

[0105] S840. If the charging gun socket port does not receive the charging pile link measurement response signal sent by the charging pile, continue to execute the control of the charging pile power positive port to send the first signal and the control of the charging pile power negative port to send the second signal to determine the charging pile charging cable fault information.

[0106] If the charging gun socket port does not receive a charging pile link measurement response signal from the charging pile within a preset time interval, it indicates a fault in the internal link of the charging pile. In this case, the positive power port of the charging pile sends a first signal, and the negative power port of the charging pile sends a second signal to determine the charging cable fault information. The fault information is then determined based on the echo signals of the first and second signals. The determination process can be referred to the above embodiment and will not be repeated here.

[0107] The technical solution of this application embodiment sends signals to the charging pile and the charging vehicle through the charging gun socket port to determine the continuity of the link between the charging pile and the charging gun socket port, as well as whether the cable length in the charging vehicle is normal. Outputting a pulse wave signal from the charging gun socket port reduces the length of the cable through which the signal travels, thereby reducing signal attenuation. By using the charging gun socket port as the signal transmitter in this application embodiment, pulse wave signal attenuation can be reduced, and the accuracy of cable length measurement can be improved. Furthermore, the pre-inspection operation in this application embodiment improves the efficiency of determining the continuity of the internal link of the charging pile.

[0108] Example 6

[0109] Figure 9 is a schematic diagram of an automatic detection device for charging pile charging faults provided in Embodiment 6 of this application. As shown in Figure 9, the device includes: a charging pile signal transmitting module 910, configured to determine whether the charging pile and the charging vehicle are successfully connected; if the charging pile and the charging vehicle are not successfully connected, it controls the positive port of the charging pile power supply to send a first signal and controls the negative port of the charging pile power supply to send a second signal; a charging pile signal receiving module 920, configured to determine the third signal received by the positive port of the charging pile power supply and the fourth signal received by the negative port of the charging pile power supply; a transmission time difference determining module 930, configured to determine the transmission time difference of the positive port based on the first signal and the third signal, and to determine the transmission time difference of the negative port based on the second signal and the fourth signal; and a first charging cable fault determining module 940, configured to determine the charging cable fault information of the charging pile based on the transmission time difference of the positive port, the transmission time difference of the negative port, and the resistance measurement information of the positive port and the negative port of the charging pile power supply.

[0110] The technical solution of this application embodiment determines whether the current charging pile is connected to the charging vehicle. If not connected, it proves that the charging pile and the charging vehicle have not established a handshake. Then, the faulty cable is determined based on the transmission time difference between the signal sent and received signals from different charging pile signal ports. The cable length is automatically detected based on the logical relationship between the measured resistance of the charging pile signal port and the corresponding cable length. This solves the problem of low troubleshooting efficiency when the charging connection fails. It achieves the effect of quickly informing users and charging pile manufacturers of the specific cause of the charging failure, speeding up the fault resolution time, and improving user satisfaction.

[0111] In one embodiment, the first charging cable fault determination module includes: a fault port determination unit, configured to determine a fault port based on the matching results of the transmission time difference of the positive port and the transmission time difference of the negative port with the transmission time difference of the normal charging pile; a resistance measurement unit, configured to determine the resistance prediction information of the fault port based on the transmission time difference of the fault port, the transmission time difference of the normal charging pile, the cable length of the normal charging pile, and the port resistance of the normal charging pile cable; and a fault information determination unit, configured to determine the charging cable fault information based on the resistance measurement information and the resistance prediction information of the fault port.

[0112] In one embodiment, the resistance measurement unit is configured to: determine the predicted break point location of the faulty port cable based on the transmission time difference of the faulty port, the transmission time difference of the normal charging pile, and the cable length of the normal charging pile; and determine the resistance prediction information of the faulty port based on the predicted break point location, the cable length of the normal charging pile, and the port resistance of the normal charging pile cable. Correspondingly, the fault information determination unit is configured to: if the resistance measurement information of the faulty port and the resistance prediction information are the same, generate the charging cable fault information based on the predicted break point location of the faulty port cable.

[0113] In one embodiment, the first signal and the second signal are pulse wave signals, the pulse wave signals comprising at least two pulse waves, and the level values ​​and high-level time intervals of the at least two pulse waves are different; correspondingly, the transmission time difference determination module is configured to: determine a first transmission time difference for the positive port based on the rising edge of the starting pulse wave in the first signal and the rising edge of the starting pulse wave in the third signal; determine a second transmission time difference for the positive port based on the falling edge of the ending pulse wave in the first signal and the falling edge of the ending pulse wave in the third signal; determine a third transmission time difference for the negative port based on the rising edge of the starting pulse wave in the second signal and the rising edge of the starting pulse wave in the fourth signal; and determine a fourth transmission time difference for the negative port based on the falling edge of the ending pulse wave in the second signal and the falling edge of the ending pulse wave in the fourth signal.

[0114] In one embodiment, the device further includes: a vehicle signal transmitting module, configured to determine whether the charging pile and the charging vehicle are successfully connected; if the charging pile and the charging vehicle are successfully connected, then controlling at least two charging pile signal ports to transmit a first vehicle cable measurement signal, and determining the second vehicle cable measurement signal received by each charging pile signal port; a vehicle cable measurement module, configured to determine the vehicle cable measurement transmission time difference based on the first vehicle cable measurement signal and the second vehicle cable measurement signal, and to determine the vehicle cable measurement length corresponding to each charging pile signal port based on the vehicle cable measurement transmission time difference; and a second charging cable fault determination module, configured to determine charging cable fault information based on the vehicle cable measurement length corresponding to each charging pile signal port, the resistance of a normal charging pile cable port, and the resistance measurement information of each charging pile signal port.

[0115] In one embodiment, the second charging cable fault determination module is configured to: determine a faulty port and a normal port from the at least two charging pile signal ports based on a comparison between the measured length of the vehicle cable corresponding to each charging pile signal port and the corresponding historical measured normal length of the vehicle cable; determine vehicle cable attribute parameters based on the resistance measurement information of the normal port, the resistance of the normal charging pile cable port, and the measured length of the vehicle cable corresponding to the normal port; determine the first predicted break point location of the faulty port in the vehicle cable based on the resistance measurement information of the faulty port, the resistance of the normal charging pile cable port, and the vehicle cable attribute parameters; and generate the charging cable fault information based on the first predicted break point location and the measured length of the vehicle cable.

[0116] In one embodiment, the vehicle cable measurement module is configured to: determine the normal charging pile transmission time difference; and determine the vehicle cable measurement length corresponding to each charging pile signal port based on the normal charging pile transmission time difference, the vehicle cable measurement transmission time difference, and the normal charging pile cable length.

[0117] In one embodiment, the device further includes a first prediction module, configured to: before determining whether the charging pile and the charging vehicle are successfully connected, control the charging pile to send a charging pile link measurement signal to the charging gun socket port; if the charging gun socket port receives the charging pile link measurement signal, then the charging gun socket port sends a response signal to the charging pile and a vehicle link measurement signal to the charging vehicle, and determines the vehicle cable measurement length based on the received signal of the vehicle link measurement signal; if the charging gun socket port does not receive the charging pile link measurement signal, then continue to control the charging pile power positive port to send a first signal and control the charging pile power negative port to send a second signal to determine the charging cable fault information of the charging pile.

[0118] In one embodiment, the device further includes a second prediction module, configured to: before determining whether the charging pile and the charging vehicle are successfully connected, control the charging gun socket port to send a charging pile link measurement signal to the charging pile and a vehicle link measurement signal to the charging vehicle; determine the vehicle cable measurement length based on the received signal of the vehicle link measurement signal; if the charging gun socket port receives a charging pile link measurement response signal sent by the charging pile, determine that the internal cable link of the charging pile is normal; if the charging gun socket port does not receive a charging pile link measurement response signal sent by the charging pile, continue to control the positive power port of the charging pile to send a first signal and control the negative power port of the charging pile to send a second signal to determine the charging cable fault information of the charging pile.

[0119] The automatic detection device for charging pile charging faults provided in this application embodiment can execute the automatic detection method for charging pile charging faults provided in any embodiment of this application, and has the corresponding functional modules and effects of the execution method.

[0120] The acquisition, storage, use, and processing of data in this application comply with relevant national laws and regulations and do not violate public order and good morals.

[0121] Example 7

[0122] According to embodiments of this disclosure, this disclosure also provides an electronic device, a readable storage medium, and a computer program product.

[0123] Figure 10 illustrates a schematic diagram of an electronic device 10 that can be used to implement embodiments of this application. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the application described and / or claimed herein.

[0124] As shown in Figure 10, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded into the RAM 13 from the storage unit 18. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0125] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0126] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any suitable processor, controller, microcontroller, etc. Processor 11 performs several of the methods and processes described above, such as automatic detection methods for charging pile charging faults.

[0127] In some embodiments, the automatic detection method for charging pile charging faults can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the automatic detection method for charging pile charging faults described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the automatic detection method for charging pile charging faults by any other suitable means (e.g., by means of firmware).

[0128] The various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a memory system, at least one input device, and at least one output device, and transferring data and instructions to the memory system, the at least one input device, and the at least one output device.

[0129] Computer programs used to implement the methods of this application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0130] In the context of this application, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. Examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, RAM, ROM, erasable programmable read-only memory (EPROM or flash memory), optical fibers, compact disc read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0131] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a cathode ray tube (CRT) or liquid crystal display (LCD) monitor) configured to display information to a user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be configured to provide interaction with a user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0132] The systems and technologies described herein can be implemented in computing systems that include back-end components (e.g., as data servers), or computing systems that include switching components (e.g., application servers), or computing systems that include front-end components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such back-end, switching, or front-end components. The components of the system can be interconnected via digital data communication (e.g., communication networks) of any form or medium. Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0133] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system. It addresses the shortcomings of traditional physical hosts and Virtual Private Server (VPS) services, such as high management difficulty and weak business scalability.

[0134] The various processes shown above can be used to rearrange, add, or delete steps. For example, the multiple steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this application can be achieved, and this is not limited herein.

Claims

1. An automatic detection method for charging pile charging faults, comprising: Determine whether the charging pile and the charging vehicle are successfully connected. In response to the charging pile and the charging vehicle not being successfully connected, control the positive power port of the charging pile to send a first signal and control the negative power port of the charging pile to send a second signal. The third signal received by the positive power port of the charging pile and the fourth signal received by the negative power port of the charging pile are determined. The transmission time difference of the positive port is determined based on the first signal and the third signal, and the transmission time difference of the negative port is determined based on the second signal and the fourth signal; The charging cable fault information of the charging pile is determined based on the transmission time difference of the positive port, the transmission time difference of the negative port, and the resistance measurement information of the positive and negative ports of the charging pile power supply.

2. The method according to claim 1, wherein, The charging cable fault information of the charging pile is determined based on the transmission time difference of the positive port, the transmission time difference of the negative port, and the resistance measurement information of the positive and negative ports of the charging pile power supply. This includes: The faulty port is determined based on the matching results of the transmission time difference of the positive port and the transmission time difference of the negative port with the transmission time difference of the normal charging pile. The resistance prediction information of the faulty port is determined based on the transmission time difference of the faulty port, the transmission time difference of the normal charging pile, the cable length of the normal charging pile, and the port resistance of the normal charging pile cable. The charging cable fault information is determined based on the resistance measurement information of the faulty port and the resistance prediction information.

3. The method according to claim 2, wherein, The resistance prediction information of the faulty port is determined based on the transmission time difference of the faulty port, the transmission time difference of the normal charging pile, the cable length of the normal charging pile, and the port resistance of the normal charging pile cable, including: The predicted break point location of the cable at the faulty port is determined based on the transmission time difference of the faulty port, the transmission time difference of the normal charging pile, and the cable length of the normal charging pile. The resistance prediction information of the faulty port is determined based on the predicted break point location, the length of the normal charging pile cable, and the port resistance of the normal charging pile cable. The charging cable fault information is determined based on the resistance measurement information of the faulty port and the resistance prediction information, including: In response to the same resistance measurement information and resistance prediction information of the faulty port, the charging cable fault information is generated based on the predicted break point location of the cable at the faulty port.

4. The method according to any one of claims 1-3, wherein, The first signal and the second signal are pulse wave signals, the pulse wave signals include at least two pulse waves, and the level values ​​and high-level time intervals of the at least two pulse waves are different; Determining the transmission time difference of the positive port based on the first signal and the third signal, and determining the transmission time difference of the negative port based on the second signal and the fourth signal, includes: The first transmission time difference of the positive port is determined based on the rising edge of the starting pulse wave in the first signal and the rising edge of the starting pulse wave in the third signal. The second transmission time difference of the positive port is determined based on the falling edge of the end pulse wave in the first signal and the falling edge of the end pulse wave in the third signal. The third transmission time difference of the negative port is determined based on the rising edge of the starting pulse wave in the second signal and the rising edge of the starting pulse wave in the fourth signal. The fourth transmission time difference of the negative port is determined based on the falling edge of the end pulse wave in the second signal and the falling edge of the end pulse wave in the fourth signal.

5. The method according to claim 1, further comprising: In response to a successful connection between the charging pile and the charging vehicle, control at least two charging pile signal ports to send a first vehicle cable measurement signal, and determine the second vehicle cable measurement signal received by each charging pile signal port; The vehicle cable measurement transmission time difference is determined based on the first vehicle cable measurement signal and the second vehicle cable measurement signal, and the vehicle cable measurement length corresponding to each charging pile signal port is determined based on the vehicle cable measurement transmission time difference. The charging cable fault information is determined based on the measured length of the vehicle cable corresponding to each charging pile signal port, the resistance of the normal charging pile cable port, and the resistance measurement information of each charging pile signal port.

6. The method according to claim 5, wherein, The charging cable fault information is determined based on the measured length of the vehicle cable corresponding to each charging pile signal port, the resistance of the normal charging pile cable port, and the resistance measurement information of each charging pile signal port, including: Based on the comparison results between the measured length of the vehicle cable corresponding to each charging pile signal port and the corresponding historical measured normal length of the vehicle cable, the faulty port and the normal port are determined from the at least two charging pile signal ports. Based on the resistance measurement information of the normal port, the resistance of the normal charging pile cable port, and the measured length of the vehicle cable corresponding to the normal port, the vehicle cable attribute parameters are determined. Based on the resistance measurement information of the faulty port, the resistance of the normal charging pile cable port, and the vehicle cable attribute parameters, the location of the first predicted break point of the faulty port in the vehicle cable is determined. The charging cable fault information is generated based on the first predicted break point location and the measured length of the vehicle cable.

7. The method according to claim 5 or 6, wherein, The vehicle cable measurement transmission time difference is determined based on the first vehicle cable measurement signal and the second vehicle cable measurement signal, and the vehicle cable measurement length corresponding to each charging pile signal port is determined based on the vehicle cable measurement transmission time difference, including: Determine the normal transmission time difference of charging piles; The vehicle cable measurement length corresponding to each charging pile signal port is determined based on the normal charging pile transmission time difference, the vehicle cable measurement transmission time difference, and the normal charging pile cable length.

8. The method according to claim 1, further comprising, before determining whether the charging pile and the charging vehicle are successfully connected: Control the charging pile to send a charging pile link measurement signal to the charging gun socket port; In response to receiving the charging pile link measurement signal at the charging gun socket port, the charging gun socket port sends an acknowledgment signal to the charging pile and a vehicle link measurement signal to the charging vehicle, and determines the vehicle cable measurement length based on the received signal of the vehicle link measurement signal. In response to the charging gun socket port not receiving the charging pile link measurement signal, the system continues to control the charging pile power positive port to send a first signal and control the charging pile power negative port to send a second signal to determine the charging pile charging cable fault information.

9. The method according to claim 1, further comprising, before determining whether the charging pile and the charging vehicle are successfully connected: The system controls the charging gun socket port to send a charging pile link measurement signal to the charging pile and a vehicle link measurement signal to the charging vehicle. The vehicle cable measurement length is determined based on the received signal of the vehicle link measurement signal; In response to receiving a charging pile link measurement response signal sent by the charging pile from the charging pile at the charging gun socket port, it is determined that the internal cable link of the charging pile is normal; In response to the charging gun socket port not receiving the charging pile link measurement response signal sent by the charging pile, the system continues to control the charging pile power positive port to send a first signal and the charging pile power negative port to send a second signal to determine the charging cable fault information of the charging pile.

10. An automatic detection device for charging pile charging faults, comprising: The charging pile signal transmission module is configured to determine whether the charging pile and the charging vehicle are successfully connected, and in response to the charging pile and the charging vehicle not being successfully connected, control the positive power port of the charging pile to send a first signal and control the negative power port of the charging pile to send a second signal. The charging pile signal receiving module is configured to determine the third signal received by the positive power port of the charging pile and the fourth signal received by the negative power port of the charging pile. The transmission time difference determination module is configured to determine the transmission time difference of the positive port based on the first signal and the third signal, and to determine the transmission time difference of the negative port based on the second signal and the fourth signal. The first charging cable fault determination module is configured to determine the charging cable fault information of the charging pile based on the transmission time difference of the positive port, the transmission time difference of the negative port, and the resistance measurement information of the positive port and the negative port of the charging pile power supply.

11. An electronic device, comprising: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the automatic detection method for charging pile charging faults according to any one of claims 1-9.

12. A computer-readable storage medium storing computer instructions, the computer instructions being configured to cause a processor to execute and implement the automatic detection method for charging pile charging faults as described in any one of claims 1-9.

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