Insulation detection determination method, electronic device, charging device, and storage medium

Abstract

The embodiment of the application provides a kind of insulation detection determination method, electronic equipment, charging equipment and storage medium, the determination method of the insulation detection includes: obtaining the current insulation resistance value of charging equipment, current insulation resistance value is the insulation resistance value measured currently;In the case where current insulation resistance value is less than insulation resistance average value, whether insulation resistance value in insulation resistance value set presents decline trend with time is judged, insulation resistance value set is the resistance value set greater than first threshold in the insulation resistance value measured historically, and insulation resistance average value is the average of insulation resistance value set;In the case where insulation resistance value in insulation resistance value set presents decline trend with time, insulation prewarning is carried out.The embodiment of the application can find the insulation safety hazard of charging equipment in advance.

Description

Technical Field

[0001] This application relates to the field of vehicle charging technology, specifically to a method for determining insulation detection, an electronic device, a charging device, and a storage medium. Background Technology

[0002] As the number of electric vehicles continues to rise, the demand for charging stations is also expanding, and the safety of charging stations is receiving increasing attention from the government and users. Because charging stations are installed outdoors, they are susceptible to impacts, direct sunlight, and moisture, which can lead to cable aging and insulation damage, potentially causing a decline in insulation and, in severe cases, posing a risk to personal safety. Therefore, insulation testing is crucial for ensuring safe charging.

[0003] Currently, the main method for insulation testing and determination of charging piles is as follows: After calculating the current insulation resistance value R using a corresponding insulation detection circuit, the current insulation resistance value R is compared with a pre-set threshold, and the insulation level of the DC charging pile is determined based on the comparison result. This current insulation testing and determination method is not comprehensive enough and poses certain safety hazards. Summary of the Invention

[0004] This application provides an insulation detection method, electronic device, charging device, and storage medium, which can detect potential insulation safety hazards in charging devices in advance.

[0005] The first aspect of this application provides a method for determining insulation detection, including:

[0006] Obtain the current insulation resistance value of the charging device, wherein the current insulation resistance value is the insulation resistance value currently measured;

[0007] If the current insulation resistance value is less than the average insulation resistance value, it is determined whether the insulation resistance value in the insulation resistance value set shows a decreasing trend over time. The insulation resistance value set is the set of insulation resistance values ​​that are greater than a first threshold value obtained from historical measurements. The average insulation resistance value is the average value of the insulation resistance value set.

[0008] When the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time, an insulation warning is issued.

[0009] Wherein, the number of insulation resistance values ​​in the set of insulation resistance values ​​is greater than or equal to 2.

[0010] Optionally, after obtaining the current insulation resistance value of the charging device, the method further includes:

[0011] If the current insulation resistance value is greater than the first threshold, determine whether the current insulation resistance value is less than the average insulation resistance value.

[0012] Optionally, determining whether the insulation resistance values ​​in the set of insulation resistance values ​​show a decreasing trend over time includes:

[0013] The current insulation resistance value is added to the first resistance set, which includes the number of insulation resistance values ​​that are historically determined to be less than the average insulation resistance value.

[0014] If the number in the first set of resistors is greater than a predetermined number, it is determined that the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time;

[0015] If the number in the first set of resistors is less than or equal to the predetermined number, it is determined that the insulation resistance value in the set of insulation resistance values ​​does not show a decreasing trend over time.

[0016] Optionally, the method further includes:

[0017] If the insulation resistance value in the set of insulation resistance values ​​does not show a decreasing trend over time, the insulation condition of the charging device is determined to be good.

[0018] Optionally, the method further includes:

[0019] If the current insulation resistance value is greater than or equal to the average insulation resistance value, the insulation condition of the charging device is determined to be good.

[0020] Optionally, the insulation warning includes:

[0021] A warning message is sent to the backend device to notify the backend device that the insulation resistance value of the charging device poses a safety risk.

[0022] Optionally, the method further includes:

[0023] If the current insulation resistance value is less than or equal to the first threshold, it is determined whether the current insulation resistance value is greater than the second threshold, and the second threshold is less than the first threshold;

[0024] If the current insulation resistance value is greater than the second threshold, an insulation abnormality alarm will be triggered.

[0025] Optionally, the insulation abnormality alarm includes:

[0026] An error message is sent to the backend device to notify the backend device that the insulation resistance value of the charging device is abnormal.

[0027] Optionally, the method further includes:

[0028] If the current insulation resistance value is less than or equal to the second threshold, it is determined that the charging device has an insulation fault, and the charging device is controlled to stop working.

[0029] Optionally, determining that an insulation fault has occurred includes:

[0030] A fault message is sent to the backend device, the fault message being used to notify the backend device that the charging device has experienced an insulation fault.

[0031] A second aspect of this application provides an insulation detection determination device, comprising:

[0032] The acquisition unit is used to acquire the current insulation resistance value of the charging device, wherein the current insulation resistance value is the insulation resistance value currently measured.

[0033] The judgment unit is used to determine whether the insulation resistance value in the insulation resistance value set shows a decreasing trend over time when the current insulation resistance value is less than the average insulation resistance value. The insulation resistance value set is the set of insulation resistance values ​​that are greater than a first threshold value obtained from historical measurements. The average insulation resistance value is the average value of the insulation resistance value set.

[0034] The early warning unit is used to issue an insulation warning when the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time.

[0035] A third aspect of this application provides an electronic device including a processor and a memory, the memory being used to store a computer program, the computer program including program instructions, and the processor being configured to invoke the program instructions to execute the step instructions as described in the first aspect of this application.

[0036] A fourth aspect of this application provides a computer-readable storage medium storing a computer program for electronic data interchange, wherein the computer program causes a computer to perform some or all of the steps described in the first aspect of this application.

[0037] A fifth aspect of this application provides a computer program product, wherein the computer program product includes a computer program operable to cause a computer to perform some or all of the steps described in the first aspect of this application. The computer program product may be a software installation package.

[0038] A sixth aspect of this application provides a charging device, including the electronic device described in the third aspect of this application. The charging device may include a charging pile or a charger.

[0039] In this embodiment, the current insulation resistance value of the charging device is obtained. This current insulation resistance value is the insulation resistance value measured at the moment. If the current insulation resistance value is less than the average insulation resistance value, it is determined whether the insulation resistance values ​​in the set of insulation resistance values ​​show a decreasing trend over time. The set of insulation resistance values ​​is the set of historically measured insulation resistance values ​​that are greater than a first threshold, and the average insulation resistance value is the average value of the set of insulation resistance values. If the insulation resistance values ​​in the set of insulation resistance values ​​show a decreasing trend over time, an insulation warning is issued. In this embodiment, when the current insulation resistance value is detected to be less than the average insulation resistance value, and the insulation resistance values ​​in the set of insulation resistance values ​​show a decreasing trend over time, an insulation warning is issued. This allows for early detection of potential insulation safety hazards in the charging device when the current insulation resistance value is less than the average insulation resistance value. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a flowchart illustrating an insulation detection determination method provided in an embodiment of this application;

[0042] Figure 2 This is a flowchart illustrating another insulation testing method provided in this application embodiment;

[0043] Figure 3 This is a schematic diagram of an insulation detection circuit provided in an embodiment of this application;

[0044] Figure 4 This is a schematic diagram of the insulation resistance value over time provided in an embodiment of this application;

[0045] Figure 5 This is a flowchart illustrating another insulation testing method provided in this application embodiment;

[0046] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0047] Figure 7 This is a schematic diagram illustrating the specific process of an insulation detection determination and early warning method provided in an embodiment of this application;

[0048] Figure 8 A schematic diagram of the structure of an insulation detection determination device provided in an embodiment of this application;

[0049] Figure 9 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0052] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0053] Please see Figure 1 , Figure 1 This is a schematic flowchart illustrating an insulation detection method provided in an embodiment of this application. Figure 1 As shown, the method may include the following steps.

[0054] 101. The electronic device obtains the current insulation resistance value of the charging device. The current insulation resistance value is the insulation resistance value measured at the moment.

[0055] In this embodiment, the charging device can be a device that supplies power to an electric device. The current insulation resistance value of the charging device can be measured by an insulation detection circuit. The electronic device can acquire the current insulation resistance value of the charging device measured by the insulation detection circuit.

[0056] Step 101 can be repeated. Before each charging of the vehicle's battery, the insulation detection circuit can be triggered to measure the insulation resistance value of the charging device. After each measurement of the insulation resistance value of the charging device, the insulation detection circuit can execute step 101.

[0057] 102. When the current insulation resistance value is less than the average insulation resistance value, the electronic device determines whether the insulation resistance value in the insulation resistance value set shows a decreasing trend over time. The insulation resistance value set is the set of insulation resistance values ​​that are greater than the first threshold value among the historically measured insulation resistance values, and the average insulation resistance value is the average value of the insulation resistance value set.

[0058] In this embodiment of the application, in the historical insulation resistance value set of the charging device, insulation resistance values ​​greater than a first threshold can be grouped into a new set: an insulation resistance value set. This insulation resistance value set is a subset of the historical insulation resistance value set. The number of insulation resistance values ​​in this insulation resistance value set is greater than or equal to 2. After the number of insulation resistance values ​​in the insulation resistance value set is greater than or equal to 2, the average value of this insulation resistance value set, i.e., the average insulation resistance value, can be calculated.

[0059] 103. When the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time, the electronic equipment will issue an insulation warning.

[0060] In this embodiment of the application, when the current insulation resistance value is detected to be less than the average insulation resistance value, and the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time, an insulation warning is issued. When the current insulation resistance value of the charging device is less than the average insulation resistance value, the decreasing trend of the insulation resistance value of the charging device can be detected in advance, thereby detecting potential insulation safety hazards of the charging device in advance.

[0061] Please see Figure 2 , Figure 2 This is a flowchart illustrating another insulation testing method provided in an embodiment of this application. Figure 2 As shown, the method may include the following steps.

[0062] 201. The electronic device obtains the current insulation resistance value of the charging device. The current insulation resistance value is the insulation resistance value measured at the moment.

[0063] In this embodiment, the charging device can be a device that supplies power to an electric device. The charging device may include a charging pile or a charger. The charging pile may include a DC charging pile, and the charger may include a DC charger. The electric device may include any one of a vehicle, aircraft, ship, or energy storage cabinet.

[0064] The current insulation resistance value of the charging device can be measured by the insulation detection circuit. The electronic device can acquire this measured insulation resistance value. The insulation detection circuit can also send the measured insulation resistance value to the electronic device. The insulation detection circuit can be a component of the electronic device. Alternatively, the insulation detection circuit and the electronic device can be two separate devices that establish communication; both are components of the charging device.

[0065] When an electronic device obtains the current insulation resistance value of a charging device, it can obtain the measurement time point of the current insulation resistance value of the charging device.

[0066] The current insulation resistance value is the insulation resistance value currently measured by the insulation detection circuit. Before each charging of the vehicle's battery, the insulation detection circuit can be triggered to measure the insulation resistance value of the charging device. Each measured insulation resistance value of the charging device can be recorded. Each measured insulation resistance value of the charging device can be added to the historical insulation resistance value set of the charging device, where the number of insulation resistance values ​​in the historical insulation resistance value set is greater than or equal to 2. The historical insulation resistance value set of the charging device is the collection of all insulation resistance values ​​measured by the charging device.

[0067] Step 201 can be repeated. Before each charging of the vehicle's battery, the insulation detection circuit can be triggered to measure the insulation resistance value of the charging device. After each measurement of the insulation resistance value of the charging device, the insulation detection circuit can execute step 201.

[0068] For the specific structure of the insulation detection circuit, please refer to [link / reference]. Figure 3 , Figure 3 This is a schematic diagram of an insulation detection circuit provided in an embodiment of this application. Figure 3 As shown, the insulation detection circuit may include a positive busbar V+, a negative busbar V-, a first resistor R1, a second resistor R2, a first switch K1, a second switch K2, a ground wire PE, a third resistor R3, a third switch K3, and a controller. The first resistor R1 and the first switch K1 are connected in series and then bridged between the positive busbar V+ and the ground wire PE; the second resistor R2 and the second switch K2 are connected in series and then bridged between the negative busbar V- and the ground wire PE; the third resistor R3 and the third switch K3 are connected in series and then bridged between the negative busbar V- and the ground wire PE. Figure 3 U in o It is the sampling voltage of the third resistor being measured.

[0069] The controller calculates the insulation resistance between the positive busbar V+ and the negative busbar V- based on the voltage between the positive busbar V+ and the negative busbar V-, the sampled voltage of the third resistor R3 in the first switch combination state, the sampled voltage of the third resistor R3 in the second switch combination state, the resistance values ​​of the first resistor R1, the second resistor R2, and the third resistor R3. Figure 3 The resistance value of Rx in the figure, the insulation resistance between the negative bus V- and the ground wire PE ( Figure 3 The resistance value of Ry in the figure.

[0070] It should be noted that, Figure 3 The insulation resistance Rx is the equivalent resistance between the simulated positive busbar V+ and the ground wire PE, and the insulation resistance Ry is the equivalent resistance between the simulated negative busbar V- and the ground wire PE. These are not actual installed resistor components. The resistances Rx and Ry are indicated here for ease of understanding during the subsequent formula calculation and derivation.

[0071] The first switch combination state includes: both the first switch K1 and the third switch K3 are in the closed state, and the second switch K2 is in the open state; the second switch combination state includes: the first switch K1, the second switch K2 and the third switch K3 are all in the closed state.

[0072] The controller calculates the insulation resistance Rx between the positive busbar and the ground wire using the following formula:

[0073]

[0074] The controller calculates the insulation resistance Ry between the negative bus and the ground wire using the following formula:

[0075]

[0076] in, R1 is the resistance of the first resistor R1, R2 is the resistance of the second resistor R2, and R3 is the resistance of the third resistor R3. U i U is the voltage between the positive bus V+ and the negative bus V-. o1 U is the sampling voltage of the third resistor R3 in the first switch combination state. o2 R is the sampling voltage of the third resistor R3 in the second switch combination state. x Rx is the insulation resistance between the positive busbar and the ground wire. y Ry represents the insulation resistance between the negative busbar and the ground wire.

[0077] Due to the different voltage division ratios of the third resistor in the first and second switch combination states, based on the sampled voltage of the third resistor in the two switch combination states and the known parameters (voltage between the positive and negative busbars, resistance of the first resistor, resistance of the second resistor, and resistance of the third resistor), two linear equations in two variables can be established. This allows for the accurate calculation of the two unknown quantities: the resistance of the first insulation resistor and the resistance of the second insulation resistor.

[0078] The insulation detection circuit can take the minimum value between the insulation resistance Rx between the positive busbar and the ground wire and the insulation resistance Ry between the negative busbar and the ground wire as the currently measured insulation resistance value.

[0079] The above embodiments use the principle of unbalanced bridge detection to separately detect and obtain values ​​for the positive and negative busbars. The insulation resistance value can also be measured using the balanced bridge detection method, which will not be described in detail in the embodiments of this application.

[0080] 202. When the current insulation resistance value is greater than the first threshold, the electronic device determines whether the current insulation resistance value is less than the average insulation resistance value. The average insulation resistance value is the average value of the set of insulation resistance values ​​that are greater than the first threshold value among the historically measured insulation resistance values.

[0081] In this embodiment, the first threshold is used to determine whether the insulation condition is good. If the current insulation resistance value is greater than the first threshold, it indicates that the current insulation condition of the charging device is good.

[0082] The first threshold can be preset, for example, it can be set to 500Ω / V × operating voltage. Here, the operating voltage can be the operating voltage of the charging device. For example, if the operating voltage of the charging device is 800V, then the first threshold is 400KΩ.

[0083] In the historical insulation resistance value set of the charging device, insulation resistance values ​​greater than a first threshold can be grouped into a new set: the insulation resistance value set. This insulation resistance value set is a subset of the historical insulation resistance value set. The number of insulation resistance values ​​in this set is greater than or equal to two. Once the number of insulation resistance values ​​in the set is greater than or equal to two, the average value of this set can be calculated, i.e., the average insulation resistance.

[0084] When the current insulation condition of the charging device is good, the electronic device determines whether the current insulation resistance value is less than the average insulation resistance in the set of insulation resistance values. If the current insulation resistance value is less than the average insulation resistance, it indicates that the insulation resistance value of the charging device may show a decreasing trend over time. Then, step 203 can be executed to determine whether the insulation resistance values ​​in the set of insulation resistance values ​​show a decreasing trend over time. If the current insulation resistance value is greater than or equal to the average insulation resistance, it indicates that the insulation resistance value of the charging device does not show a decreasing trend over time, and the current insulation resistance value can be added to the aforementioned set of insulation resistance values.

[0085] It should be noted that the set of insulation resistance values ​​in step 202 may include the current insulation resistance value, or it may not include the current insulation resistance value.

[0086] If the insulation resistance value set does not include the current insulation resistance value in step 202, the step of adding the current insulation resistance value to the insulation resistance value set can be performed after step 202 and before step 203.

[0087] 203. When the current insulation resistance value is less than the average insulation resistance, the electronic device determines whether the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time.

[0088] In this embodiment, the electronic device can analyze the trend of insulation resistance values ​​in the insulation resistance value set over time to determine whether the insulation resistance values ​​in the insulation resistance value set show a decreasing trend over time. If a decreasing trend is observed, step 204 can be executed to issue an insulation warning. If no decreasing trend is observed, no further processing is required, and step 201 can continue.

[0089] It should be noted that the set of insulation resistance values ​​in step 203 includes the current insulation resistance value.

[0090] Optionally, the electronic device can fit a curve of the insulation resistance values ​​in the insulation resistance value set over time based on each insulation resistance value in the set and the corresponding measurement time point, and analyze the changing trend of the curve.

[0091] Please see Figure 4 , Figure 4 This is a schematic diagram of the insulation resistance value over time provided in an embodiment of this application. Figure 4As shown in the curve, although the insulation resistance value remains greater than the first threshold, it exhibits a decreasing trend over time. For example, the number of decreases and increases in the insulation resistance value over time can be analyzed. When the number of decreases exceeds the number of increases, and the difference between the number of decreases and increases is greater than the first set threshold, it is determined that the insulation resistance value exhibits a decreasing trend over time. For example, an alarm can be triggered when the number of decreases reaches a second set threshold. Both the first and second set thresholds can be preset; they can be set to be the same or different.

[0092] Optionally, in step 203, the electronic device determines whether the insulation resistance values ​​in the set of insulation resistance values ​​show a decreasing trend over time, which may specifically include the following steps:

[0093] (11) The electronic device adds the current insulation resistance value to a first resistance set, the first resistance set including the number of insulation resistance values ​​that are historically determined to be less than the average insulation resistance value.

[0094] (12) When the number in the first set of resistors is greater than a predetermined number, the electronic device determines that the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time.

[0095] (13) When the number in the first set of resistors is less than or equal to the predetermined number, the electronic device determines that the insulation resistance value in the set of insulation resistance values ​​does not show a decreasing trend over time.

[0096] In this embodiment, the first resistance set is a collection of historically statistically trending resistance values. The first resistance set includes the number of insulation resistance values ​​historically determined to be less than the average insulation resistance. Steps 201 to 203 can be repeated. Each time step 202 is executed, the electronic device can determine whether the current insulation resistance value is less than the average insulation resistance value. If it is less, the current insulation resistance value is added to the first resistance set.

[0097] If the number in the first set of resistors is greater than the predetermined number, it indicates that the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time.

[0098] The pre-set quantity can be set in advance; for example, it can be set to a value greater than or equal to 10. For instance, the pre-set quantity can be set to 20. The pre-set quantity can be adjusted according to actual needs.

[0099] This application provides a method for determining whether the insulation resistance values ​​in a set of insulation resistance values ​​show a decreasing trend over time. This method can accurately identify resistance values ​​with a decreasing trend and accurately determine whether the insulation resistance values ​​in a set of insulation resistance values ​​show a decreasing trend over time. For example, for... Figure 4 The curve of insulation resistance value over time shown can be accurately identified by the steps (11) to (13) above, showing that the insulation resistance value in the curve decreases over time.

[0100] 204. When the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time, the electronic equipment will issue an insulation warning.

[0101] In this embodiment, the electronic device provides an insulation warning by displaying a warning message on the charging device's screen, specifically stating that "the insulation resistance value of this charging device poses a safety risk." The device can also play a corresponding audio message from the charging device's speaker. Furthermore, the electronic device can control the charging device's indicator lights to provide an insulation warning (e.g., controlling the indicator lights to display a corresponding color or flashing frequency).

[0102] Electronic devices can provide insulation warnings and can also send warning messages to backend devices.

[0103] Optionally, in step 204, the electronic device performs an insulation warning, which may specifically include the following steps:

[0104] The electronic device sends a warning message to the background device, the warning message being used to notify the background device that the insulation resistance value of the charging device poses a safety risk.

[0105] In this embodiment, the backend device can be a device that monitors charging equipment. The backend device can communicate with electronic devices, and the electronic devices can send warning messages to the backend device. These warning messages can include the status information of the charging equipment, and the status information of the charging pile can include whether the insulation resistance value of the charging equipment poses a safety risk. The backend device can display the status information of the charging equipment or provide voice reminders about its status. If the insulation resistance value of a charging device poses a safety risk, the backend device can clearly display this information. By using differentiated display (e.g., using a prominent color or bold font), maintenance personnel can be effectively alerted to the safety risk associated with the insulation resistance value of the charging equipment from the backend device. This timely notification ensures that maintenance personnel are promptly informed of the potential safety risk.

[0106] In this embodiment of the application, when the current insulation resistance value is detected to be greater than the first threshold, it is further determined whether the current insulation resistance value is less than the average insulation resistance. When the current insulation resistance value is less than the average insulation resistance and the insulation resistance values ​​in the insulation resistance value set show a decreasing trend over time, an insulation warning is issued. When the current insulation resistance value of the charging device is greater than the first threshold, the decreasing trend of the insulation resistance value of the charging device can be detected in advance, thereby detecting potential insulation safety hazards of the charging device in advance.

[0107] Please see Figure 5 , Figure 5 This is a flowchart illustrating another insulation testing method provided in an embodiment of this application. Figure 5 As shown, the method may include the following steps.

[0108] 501, Electronic device obtains the current insulation resistance value of the charging device. The current insulation resistance value is the insulation resistance value measured at the moment.

[0109] 502. When the current insulation resistance value is greater than the first threshold, the electronic device determines whether the current insulation resistance value is less than the average insulation resistance value. The average insulation resistance value is the average value of the set of insulation resistance values ​​that are greater than the first threshold value among the historically measured insulation resistance values.

[0110] 503. When the current insulation resistance value is less than the average insulation resistance value, the electronic device determines whether the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time.

[0111] 504. When the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time, the electronic equipment will issue an insulation warning.

[0112] The specific implementation of steps 501 to 504 can be found in steps 201 to 204 above, and will not be repeated here.

[0113] 505. If the insulation resistance value in the set of insulation resistance values ​​does not show a decreasing trend over time, the electronic device determines that the insulation condition of the charging device is good.

[0114] In this embodiment, if the insulation resistance value in the insulation resistance value set does not show a decreasing trend over time, since the current insulation resistance value is greater than the first threshold, it indicates that the insulation state of the charging device is good and no further processing is required. We can continue to wait for the next step 501 to be executed.

[0115] 506. When the current insulation resistance value is greater than or equal to the average insulation resistance, the electronic device determines that the insulation condition of the charging device is good.

[0116] In this embodiment, if the current insulation resistance value is greater than or equal to the average insulation resistance value, it indicates that the insulation resistance values ​​in the insulation resistance value set do not show a decreasing trend over time. Since the current insulation resistance value is greater than the first threshold, it indicates that the insulation condition of the charging device is good and no further processing is required. We can continue to wait for the next step 501 to be executed.

[0117] 507. If the current insulation resistance value is less than or equal to the first threshold, the electronic device determines whether the current insulation resistance value is greater than the second threshold, and the second threshold is less than the first threshold.

[0118] 508. When the current insulation resistance value is greater than the second threshold, the electronic equipment will issue an insulation abnormality alarm.

[0119] 509. If the current insulation resistance value is less than or equal to the second threshold, the electronic device determines that the charging device has an insulation fault and controls the charging device to stop working.

[0120] In this embodiment, the first threshold is used to determine whether the insulation condition is good. If the current insulation resistance value is greater than the first threshold, the electronic device further determines whether the charging device has a good insulation condition or issues an insulation warning.

[0121] If the current insulation resistance value is less than or equal to the first threshold, it indicates that the current insulation condition of the charging device is poor. At this point, the electronic device further determines whether the current insulation resistance value is greater than the second threshold.

[0122] The second threshold is used to determine whether an insulation fault has occurred. If the current insulation resistance value is greater than the second threshold, it indicates that the current insulation condition of the charging device is poor, but no insulation fault has occurred. At this time, the electronic device will issue an insulation abnormality alarm.

[0123] If the current insulation resistance value is less than or equal to the second threshold, it indicates that the charging device has an insulation fault and cannot continue to work (if it continues to work, there will be risks such as leakage and electric shock). At this time, the electronic device determines that the charging device has an insulation fault and controls the charging device to stop working.

[0124] The second threshold can be preset; for example, it can be set to 200Ω / V × operating voltage. The operating voltage can be the operating voltage of the charging device. For instance, if the operating voltage of the charging device is 800V, then the second threshold is 160KΩ.

[0125] Optionally, in step 508, the electronic device triggering an insulation abnormality alarm may include:

[0126] The electronic device sends an abnormal message to the background device, the abnormal message being used to notify the background device that the insulation resistance value of the charging device is abnormal.

[0127] In this embodiment, the backend device can be a device that monitors the charging equipment. The backend device can communicate with the electronic device, and the electronic device can send abnormal messages to the backend device. These abnormal messages can include the status information of the charging equipment, and the status information of the charging pile can include an abnormal insulation resistance value of the charging equipment. The backend device can display the status information of the charging equipment or provide voice prompts regarding its status. If the insulation resistance value of a charging device is abnormal, the backend device can display this abnormal information separately. By using differentiated display (e.g., using a prominent color or bold font), the maintenance personnel can be better alerted to the abnormal insulation resistance value from the backend device. This allows for timely notification of the abnormal insulation resistance value to the charging equipment maintenance personnel.

[0128] Electronic devices can also indicate abnormal insulation resistance values ​​by controlling indicator lights on the charging device (e.g., by controlling the indicator light to display a corresponding color or flashing frequency). It's important to note that an insulation warning and an insulation anomaly alarm are different. For example, an insulation warning might be a flashing yellow light, while an insulation anomaly alarm might be a flashing red light.

[0129] Optionally, in step 509, determining that an insulation fault has occurred in the electronic device may include:

[0130] The electronic device sends a fault message to the background device, the fault message being used to notify the background device that the charging device has experienced an insulation fault.

[0131] In this embodiment, the backend device can be a device that monitors the charging equipment. The backend device can communicate with the electronic device, which can send fault messages to the backend device. These fault messages may include the status information of the charging equipment, and the status information of the charging pile may include an insulation fault in the charging equipment. The backend device can display the status information of the charging equipment or provide voice prompts regarding its status. If an insulation fault occurs in a charging device, the backend device can display this information separately. By using distinctive displays (e.g., using a bright color or bold font), the maintenance personnel can be better alerted to the insulation fault information in the backend device, thus promptly notifying them of the insulation fault.

[0132] Currently, the main method for insulation testing and judgment of charging equipment is as follows: After calculating the current insulation resistance value R through a corresponding insulation detection circuit, the current insulation resistance value R is compared with a pre-set threshold. Based on the comparison result, the insulation level of the charging equipment (e.g., a DC charging pile) is determined. This current insulation testing and judgment method is not comprehensive enough. It cannot determine the degradation of insulation performance when the insulation resistance value exceeds the set safety threshold (i.e., good insulation condition), posing a certain safety hazard. Compared to when it left the factory, the insulation performance of charging equipment inevitably declines over long-term operation and environmental corrosion. Even when the insulation resistance value exceeds the set safety threshold (such as the first threshold mentioned above), its insulation performance may have already deteriorated, or even be gradually worsening. During long-term use of charging equipment, the insulation performance of internal components also declines due to their lifespan. When the insulation performance of a component is at a critical point and difficult to detect, the insulation performance may fail instantly, a very dangerous situation.

[0133] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. For example... Figure 6 As shown, the electronic device may include an insulation resistance value judgment unit, a non-safety threshold processing unit, a fault judgment unit, a safety threshold processing unit, and a warning judgment unit.

[0134] The insulation resistance value judgment unit can obtain the current insulation resistance value R and compare it with the threshold required by the national standard (GB / T18487.1-2015) to determine whether the current insulation resistance value R is greater than the safety threshold. The safety threshold can be 500Ω / V × operating voltage. The safety threshold can be the first threshold mentioned above.

[0135] When the current insulation resistance value R is lower than the safety threshold, the non-safety threshold processing unit can compare the currently acquired (e.g., the Nth time) insulation resistance value R with the preset threshold for insulation abnormality or insulation fault. The fault determination unit then determines whether the current insulation resistance R is an insulation abnormality alarm or an insulation fault that requires charging to stop.

[0136] When the current insulation resistance value R (e.g., the Nth time) is greater than the safety threshold, the safety threshold processing unit determines the safety threshold based on the currently acquired insulation resistance value R and R... AVG The resistance values ​​are compared, and the early warning judgment unit determines whether the current insulation resistance value R is in a good insulation state or issues an insulation warning.

[0137] The insulation detection resistance value R AVGThe safety threshold processor memorizes the insulation resistance values ​​of the charging piles when the insulation detection exceeds the safety threshold for the 1st, 2nd, 3rd, ..., N-1th times. The average value calculated based on these N-1 values ​​is R. AVG The value is calculated using the following formula:

[0138]

[0139] Among them, R i The insulation resistance value obtained for the i-th time is higher than the safety threshold.

[0140] In this embodiment, when the insulation resistance value of the charging pile is less than the safety threshold, it can determine whether the current insulation resistance value R is an insulation abnormality alarm or an insulation fault causing charging to stop; it can also provide early warning before the insulation performance of the charging pile fails when the insulation resistance value is greater than the safety threshold, indicating that the insulation resistance may decrease or gradually deteriorate. This embodiment has a wider monitoring range for the insulation resistance R and a more comprehensive judgment of the insulation status, greatly eliminating safety hazards caused by the decrease in the insulation value of the charging pile, thereby ensuring the safe charging of electric vehicles. The structure and principle of this embodiment are simple, the control process is concise, and the preset parameters can be adjusted according to actual needs, making the design more flexible. This embodiment has a simple structure, high reliability, does not require additional hardware circuitry, has low overall cost, and is easy to implement.

[0141] Please see Figure 7 , Figure 7 This is a schematic flowchart illustrating a method for determining and issuing early warnings for insulation detection, as provided in an embodiment of this application. Figure 7 As shown, the method may include the following steps.

[0142] 701, the insulation resistance value judgment unit obtains the current insulation resistance value R. x R y The minimum of the two values ​​is taken as the current insulation resistance value R.

[0143] 702, The insulation resistance value judgment unit judges whether the current insulation resistance value R is greater than 500Ω / V×working voltage. If not, proceed to step 703; if yes, proceed to step 705.

[0144] Among them, 500Ω / V × operating voltage can be the above-mentioned safety threshold.

[0145] 703. The non-safety threshold processing unit compares the current insulation resistance value R with a preset threshold, which includes an insulation abnormality alarm threshold and an insulation fault threshold. The insulation abnormality alarm threshold is (100Ω / V×working voltage)<R≤(500Ω / V×working voltage); the insulation fault threshold is R≤(100Ω / V×working voltage).

[0146] 704. The fault determination unit judges the insulation status. When (100Ω / V×working voltage)<R≤(500Ω / V×working voltage), it is judged as an insulation abnormality alarm; when R≤(100Ω / V×working voltage), it is judged as an insulation fault and charging is stopped.

[0147] 705. When the safety threshold processing unit obtains the current insulation resistance value R>(500Ω / V×operating voltage), it records the insulation resistance value R of this charge.

[0148] 706, the safety threshold processing unit compares the insulation resistance value R of this charge with the average value R. AVG By comparison, the insulation resistance value of this charge is R > (500Ω / V × operating voltage).

[0149] 707, the early warning determination unit determines whether the insulation resistance value R of this charge indicates good insulation or issues an insulation warning. When R ≥ R AVG When R < R, the insulation condition is judged to be good; when R < R AVG If the number of charging cycles exceeds the preset number by the warning judgment unit, an insulation warning will be issued.

[0150] When the first charge occurs, R < R AVG When the value is R, the warning judgment unit remembers this charging count as the first time; when the second charging occurs and R < R AVG When R < R, the warning determination unit records the number of times the charge has been performed as the second time; and so on, when R < R AVG If the number of charging cycles exceeds the preset number by the warning determination unit (for example, the preset number by the warning determination unit can be the aforementioned predetermined number), an insulation warning will be issued. The preset number can be adjusted according to actual needs.

[0151] This application provides a method for determining and issuing early warnings regarding the insulation detection of charging piles. This method can determine whether the current insulation resistance value R indicates an insulation abnormality alarm or an insulation fault causing charging to stop. It can also provide early warnings when the insulation resistance value exceeds a safety threshold, indicating a decline or gradual deterioration in insulation performance. Based on the specific test results, charging pile maintenance personnel can perform maintenance, incident investigation, and fault repair, preventing accidents. This ensures that the charging pile always operates under good insulation conditions and significantly reduces the risk of electric shock and other safety accidents caused by insulation faults, thereby guaranteeing the safe charging of electric vehicles.

[0152] The above describes the solutions of the embodiments of this application from the perspective of the method execution process. It is understood that, in order to achieve the above functions, the electronic device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments provided herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0153] This application embodiment can divide the electronic device into functional units according to the above method example. For example, each function can be divided into a separate functional unit, or two or more functions can be integrated into one processing unit. The integrated unit can be implemented in hardware or as a software functional unit. It should be noted that the unit division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0154] Please see Figure 8 , Figure 8 This is a schematic diagram of an insulation detection determination device 800 provided in an embodiment of this application. The insulation detection determination device 800 may include an acquisition unit 801, a determination unit 802, and an early warning unit 803, wherein:

[0155] The acquisition unit 801 is used to acquire the current insulation resistance value of the charging device, wherein the current insulation resistance value is the insulation resistance value currently measured.

[0156] The judgment unit 802 is used to determine whether the insulation resistance value in the insulation resistance value set shows a decreasing trend over time when the current insulation resistance value is less than the average insulation resistance value. The insulation resistance value set is the set of insulation resistance values ​​that are greater than a first threshold value obtained from historical measurements. The average insulation resistance value is the average value of the insulation resistance value set.

[0157] Wherein, the number of insulation resistance values ​​in the set of insulation resistance values ​​is greater than or equal to 2.

[0158] The early warning unit 803 is used to provide an insulation warning when the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time.

[0159] Optionally, the judgment unit 802 is further configured to determine whether the current insulation resistance value is less than the average insulation resistance value when the current insulation resistance value is greater than the first threshold.

[0160] Optionally, the judgment unit 802 determines whether the insulation resistance values ​​in the insulation resistance value set show a decreasing trend over time, including: adding the current insulation resistance value to a first resistance set, the first resistance set including the number of insulation resistance values ​​less than the average insulation resistance value determined in the past; if the number in the first resistance set is greater than a predetermined number, determining that the insulation resistance values ​​in the insulation resistance value set show a decreasing trend over time; if the number in the first resistance set is less than or equal to the predetermined number, determining that the insulation resistance values ​​in the insulation resistance value set do not show a decreasing trend over time.

[0161] Optionally, the insulation detection determination device 800 may further include a determination unit 804.

[0162] The determining unit 804 is used to determine that the insulation condition of the charging device is good when the insulation resistance value in the set of insulation resistance values ​​does not show a decreasing trend over time.

[0163] Optionally, the determining unit 804 is used to determine that the insulation status of the charging device is good when the current insulation resistance value is greater than or equal to the average insulation resistance value.

[0164] Optionally, the early warning unit 803 performs an insulation warning, including sending an early warning message to the background device, the early warning message being used to notify the background device that the insulation resistance value of the charging device poses a safety risk.

[0165] Optionally, the insulation detection determination device 800 may also include an alarm unit 805.

[0166] The judgment unit 802 is further configured to determine whether the current insulation resistance value is greater than a second threshold when the current insulation resistance value is less than or equal to the first threshold, wherein the second threshold is less than the first threshold.

[0167] Alarm unit 805 is used to issue an insulation abnormality alarm when the current insulation resistance value is greater than the second threshold.

[0168] Optionally, the alarm unit 805 performs an insulation abnormality alarm by sending an abnormality message to the background device, the abnormality message being used to notify the background device that the insulation resistance value of the charging device is abnormal.

[0169] Optionally, the determining unit 804 is further configured to determine that the charging device has an insulation fault when the current insulation resistance value is less than or equal to the second threshold, and control the charging device to stop working.

[0170] Optionally, the determining unit 804 determines that an insulation fault has occurred by: sending a fault message to a background device, the fault message being used to notify the background device that an insulation fault has occurred in the charging device.

[0171] In this embodiment, the acquisition unit 801, the judgment unit 802, and the determination unit 804 can be processors in electronic devices. The warning unit 803 and the alarm unit 805 in this embodiment can be communication modules in electronic devices.

[0172] In this embodiment of the application, when the current insulation resistance value is detected to be less than the average insulation resistance value, and the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time, an insulation warning is issued. When the current insulation resistance value of the charging device is less than the average insulation resistance value, the decreasing trend of the insulation resistance value of the charging device can be detected in advance, thereby detecting potential insulation safety hazards of the charging device in advance.

[0173] Please see Figure 9 , Figure 9 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application, such as... Figure 9 As shown, the electronic device 900 includes a processor 901 and a memory 902, which are interconnected via a communication bus 903. The communication bus 903 can be a peripheral component interconnect (PCI) bus, an extended industry standard architecture (EISA) bus, or a controller area network (CAN) bus, etc. The communication bus 903 can be divided into an address bus, a data bus, and a control bus, etc. For ease of illustration, Figure 9 The code uses only a single thick line to represent a bus, but this does not indicate that there is only one bus or one type of bus. Memory 902 stores computer programs, which include program instructions. Processor 901 is configured to call these program instructions, which include instructions for execution. Figures 1-6 It includes some or all of the steps in the methods.

[0174] Processor 901 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the above-described program. Specifically, processor 901 may be the aforementioned control module.

[0175] The memory 902 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital versatile optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto. The memory may exist independently and be connected to the processor via a bus. The memory may also be integrated with the processor.

[0176] The electronic device 900 may also include a communication module 904, which can communicate with a back-end device.

[0177] In this embodiment of the application, when the current insulation resistance value is detected to be less than the average insulation resistance value, and the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time, an insulation warning is issued. When the current insulation resistance value of the charging device is less than the average insulation resistance value, the decreasing trend of the insulation resistance value of the charging device can be detected in advance, thereby detecting potential insulation safety hazards of the charging device in advance.

[0178] This application also provides a computer-readable storage medium storing a computer program for electronic data interchange, which causes a computer to perform some or all of the steps of any of the insulation detection determination methods described in the above method embodiments.

[0179] A sixth aspect of the embodiments of this application provides a charging device, which may include... Figure 9The electronic device shown. The charging device may include a charging station or a charger.

[0180] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0181] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0182] In the several embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0183] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0184] Furthermore, the functional units in the various embodiments of the application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software program module.

[0185] If the integrated unit is implemented as a software program module and sold or used as an independent product, it can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned memory includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0186] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage device, which may include: a flash drive, a read-only memory, a random access memory, a magnetic disk, or an optical disk, etc.

[0187] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for determining insulation resistance, characterized in that, include: Obtain the current insulation resistance value of the charging device, wherein the current insulation resistance value is the insulation resistance value currently measured; If the current insulation resistance value is greater than the first threshold, determine whether the current insulation resistance value is less than the average insulation resistance value; The first threshold is used to determine whether the insulation condition is good; If the current insulation resistance value is less than the average insulation resistance value, it is determined whether the insulation resistance value in the insulation resistance value set shows a decreasing trend over time. The insulation resistance value set is the set of insulation resistance values ​​that are greater than a first threshold value obtained from historical measurements. The average insulation resistance value is the average value of the insulation resistance value set. An insulation warning is issued when the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time. The determination of whether the insulation resistance values ​​in the set of insulation resistance values ​​show a decreasing trend over time includes: The current insulation resistance value is added to the first resistance set, which includes historically determined insulation resistance values ​​that are less than the average insulation resistance value. If the number in the first set of resistors is greater than a predetermined number, it is determined that the insulation resistance value in the set of insulation resistance values ​​shows a decreasing trend over time; If the number in the first set of resistors is less than or equal to the predetermined number, it is determined that the insulation resistance value in the set of insulation resistance values ​​does not show a decreasing trend over time.

2. The method according to claim 1, characterized in that, The method further includes: If the insulation resistance value in the set of insulation resistance values ​​does not show a decreasing trend over time, the insulation condition of the charging device is determined to be good.

3. The method according to claim 1, characterized in that, The method further includes: If the current insulation resistance value is greater than or equal to the average insulation resistance value, the insulation condition of the charging device is determined to be good.

4. The method according to claim 1, characterized in that, The insulation warning includes: A warning message is sent to the backend device to notify the backend device that the insulation resistance value of the charging device poses a safety risk.

5. The method according to claim 1, characterized in that, The method further includes: If the current insulation resistance value is less than or equal to the first threshold, it is determined whether the current insulation resistance value is greater than the second threshold, and the second threshold is less than the first threshold; If the current insulation resistance value is greater than the second threshold, an insulation abnormality alarm will be triggered.

6. The method according to claim 5, characterized in that, The method further includes: If the current insulation resistance value is less than or equal to the second threshold, it is determined that the charging device has an insulation fault, and the charging device is controlled to stop working.

7. The method according to claim 5, characterized in that, The insulation abnormality alarm includes: An error message is sent to the backend device to notify the backend device that the insulation resistance value of the charging device is abnormal.

8. An electronic device, characterized in that, The device includes a processor and a memory, the memory being used to store a computer program, the computer program including program instructions, and the processor being configured to invoke the program instructions to perform the method as described in any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, the computer program including program instructions that, when executed by a processor, cause the processor to perform the method as described in any one of claims 1 to 7.

10. A charging device, characterized in that, Including the electronic device as described in claim 8.

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