Risk prompting method and device and vehicle

Abstract

The invention discloses a risk prompting method and device and a vehicle. The method comprises the steps that an insulation resistance value and a risk threshold value of a vehicle high-voltage system are acquired; and in a preset time range, under the condition that the cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches different preset numbers of times, an early warning prompt is sent to a user in a preset mode corresponding to the preset numbers of times, and the preset mode comprises a mode of adopting a vehicle limiting function and / or a mode of sending an alarm to the user. According to the technical scheme, the risks of vehicle fire and personnel electric shock caused by insulation failure of the vehicle (such as a new energy vehicle) can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile electronics and electric technology, and particularly relates to a risk prompting method and device and a vehicle. BACKGROUND

[0002] With the rapid development of new energy vehicle technology, high-voltage systems are increasingly widely used in vehicles, and their insulation performance is of vital importance to vehicle safety, the safety of passengers and the safety of the operating environment. However, in actual use, high-voltage system insulation failure problems occur frequently, and the causes are complex and diverse (for example, water entering the high-voltage connector, coolant leakage, and internal conductive body loosening of high-voltage components leading to reduced electrical clearance and virtual connection, etc.). If not discovered and handled in time, it may cause high-voltage component ablation, limited function, and even cause a vehicle fire or electric shock, and other major safety accidents.

[0003] However, the industry generally uses vehicle insulation resistance monitoring to judge the insulation state of the high-voltage system, but this method can only achieve passive alarm after a fault occurs, and cannot effectively identify and warn at the early stage of insulation performance degradation, lacking the ability to actively identify and intervene potential risks. In addition, the current industry's high-voltage system insulation fault clearing mechanism is limited to automatic clearing or KL15 cycle clearing, and users often "run with illness" in daily use, and do not check the vehicle until it is about to be paralyzed, resulting in repeated drops in insulation resistance without anyone noticing, and ultimately causing major safety accidents.

[0004] Therefore, how to block the evolution of insulation failure into a disastrous path of fire and electric shock at the early stage of insulation performance degradation without relying on the user's self-consciousness has become a technical problem to be solved. SUMMARY

[0005] Therefore, the embodiments of the present application provide a risk prompting method and device and vehicle, which can reduce the risk of vehicle fire and electric shock caused by insulation failure of the vehicle (for example, a new energy vehicle).

[0006] In a first aspect, the embodiments of the present application provide a risk prompting method, which comprises: obtaining an insulation resistance value of a high-voltage system of a vehicle and a risk threshold value; and in a case where the number of times that the insulation resistance value is lower than the risk threshold value reaches different preset numbers within a preset time range, issuing a warning prompt to a user in a preset manner corresponding to the preset number, wherein the preset manner comprises a manner of limiting the function of the vehicle and / or issuing a warning to the user.

[0007] The embodiment of the application provides a risk prompting method and device and a vehicle, by acquiring an insulation resistance value of the vehicle and a preset risk threshold value, and in a preset time range, in the case that the cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches different preset numbers of times, a preset mode corresponding to the preset number of times is used to send a warning prompt to a user, so that the embodiment of the application can define the level degree of insulation failure and different processing modes based on the risk threshold value and the risk counting mode, form a closed loop of data perception, level judgment and forced maintenance, thereby cutting off the problems such as fire and electric shock caused by insulation failure in the budding period, and the embodiment of the application also covers all vehicle scenes such as driving, charging and parking, and systematically reduces the probability of fire and personal injury caused by insulation failure of the new energy vehicle.

[0008] In some embodiments of the application, the preset mode includes a maintenance telephone reminder and / or a display screen of the vehicle displaying maintenance information, wherein the preset mode corresponding to the preset number of times is used to send a warning prompt to the user in the case that the cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches different preset numbers of times, including: in the case that the cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches a first preset threshold value, triggering a vehicle-mounted emergency call system so that the user receives a maintenance telephone reminder from an operation and maintenance management platform; and / or in the case that the cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches the first preset threshold value, the display screen displays the maintenance information.

[0009] Therefore, in the case that the insulation resistance value is lower than the risk threshold value and accumulates to the first preset threshold value (for example, 10 times) in a natural month, the embodiment of the application synchronously triggers the vehicle-mounted emergency call and / or the instrument pop-up window, wherein the e-Call function immediately connects the operation and maintenance management platform, ensures that the user does not miss the maintenance telephone, the display screen displays the maintenance information, and forms "voice + vision" dual warning. Both greatly improve the user's perception of high-voltage hazards and enhance trust through official outbound calls, avoiding the traditional prompt being ignored, thereby containing the insulation failure before forced power lock, and reducing the risk of electric shock, arc and subsequent recall.

[0010] In some embodiments of the application, in the case that the cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches the first preset threshold value, the vehicle-mounted emergency call system is triggered so that the user receives a maintenance telephone reminder from the operation and maintenance management platform, including: in the case that the cumulative number of times is detected to reach the first preset threshold value, an alarm instruction is sent to the operation and maintenance management platform; and receiving a maintenance telephone call made by a staff of the operation and maintenance management platform.

[0011] Therefore, the embodiment of the application can actively trigger remote manual intervention before the insulation failure accumulates to the danger, and significantly reduce the vehicle anchoring and safety risk caused by high-voltage leakage.

[0012] In some embodiments of the present application, the preset mode includes prohibiting high-voltage power-on to make the vehicle unable to travel, and in the case that the cumulative number of times that the insulation resistance value is lower than the risk threshold reaches different preset numbers, a preset mode corresponding to the preset number is used to issue a warning prompt to the user, including: in the case that the cumulative number of times that the insulation resistance value is lower than the risk threshold reaches a second preset threshold, high-voltage power-on to the vehicle is prohibited.

[0013] Therefore, in the embodiments of the present application, the cumulative number of times that the insulation resistance value is lower than the risk threshold in a natural month is set as a high-voltage lock red line (for example, 20 times), and once triggered, the relay is immediately disconnected, power-on is prohibited, and vehicle driving is prohibited, so as to completely block the risk of "sick running" in the station, avoid serious accidents of the vehicle, and significantly reduce the probability of after-sales recall. At the same time, the monthly cumulative mechanism avoids infinite accumulation of historical count, and ensures that only the insulation fault that is truly deteriorating will be locked for high voltage, and safety, experience and operation cost are considered.

[0014] In some embodiments of the present application, the preset mode includes that the display screen of the vehicle displays maintenance information, and the display screen includes the instrument of the vehicle, and in the case that the cumulative number of times that the insulation resistance value is lower than the risk threshold reaches different preset numbers, a preset mode corresponding to the preset number is used to issue a warning prompt to the user, including: in the case that the cumulative number of times that the insulation resistance value is lower than the risk threshold reaches a third preset threshold, the maintenance information is prompted to the user in the form of a pop-up window through the instrument.

[0015] Therefore, in the embodiments of the present application, the instrument is used as the display screen for prompting the maintenance information, and when the cumulative number of times that the insulation resistance value is lower than the risk threshold in a month reaches a third preset threshold (for example, 5 times), a first-level warning is immediately issued in the form of a pop-up window, which not only utilizes the hardware feature that the driver's forward visual blind area is minimized to ensure that the warning information is seen at the first time, but also prevents the accumulation of historical count from misreporting by means of the automatic zero-clearing mechanism at the end of the month, so as to balance the timeliness of safety reminders and user experience friendliness, prompt the user to check the insulation hidden danger as soon as possible, and reduce the risk that high-voltage leakage evolves into a serious fault or an electric shock accident.

[0016] In some embodiments of the present application, it also includes: receiving the risk that the user clears the warning prompt in a manual or automatic manner.

[0017] Therefore, in the embodiments of the present application, after the insulation warning is triggered, the user can not only immediately remove the pop-up window and telephone reminders by means of the "one-key code clearing" of the shop diagnosis instrument, but also can automatically extinguish the warning after the natural zero-clearing in the next month or the completion of one KL15 cycle and the recovery of the insulation to normal, without the need to force the vehicle to enter the shop for maintenance to eliminate occasional misreports, significantly reducing unnecessary after-sales station entry and user anxiety, while retaining the closed-loop repair path for real insulation faults, and safety, convenience and operation cost are considered.

[0018] In some embodiments of the present application, the preset time range is one month, and the value of the risk threshold ranges from 40 kilo-ohms to 100 kilo-ohms.

[0019] Therefore, by setting the risk threshold to a value ranging from 40 kilo-ohms to 100 kilo-ohms, the early detection, gradual intervention and closed-loop management of early repair are achieved, i.e., the insulation degradation is captured as soon as possible, false positives caused by occasional interference are avoided, and vehicles with real potential risks can be screened out in time. Meanwhile, by setting the preset time range to one month and using the monthly counting method, the complexity of the algorithm and the storage cost are reduced.

[0020] In a second aspect, an embodiment of the present application provides a risk prompting device, comprising: an acquisition module configured to acquire an insulation resistance value of a high-voltage system of a vehicle and a risk threshold; and a prompting module configured to, in a case where the number of times that the insulation resistance value is lower than the risk threshold reaches different preset numbers of times within a preset time range, issue a warning prompt to a user in a preset manner corresponding to the preset numbers of times, wherein the preset manner comprises a manner of limiting the function of the vehicle and / or issuing a warning to the user.

[0021] In a third aspect, an embodiment of the present application provides a vehicle, comprising: a processor; and a memory configured to store processor-executable instructions, wherein the processor is configured to execute the risk prompting method of the first aspect.

[0022] In a fourth aspect, an embodiment of the present application provides a computer program product, comprising a computer program configured to implement the risk prompting method of the first aspect when executed by a processor. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, which together with the detailed description, serve to explain the present disclosure and do not constitute a limitation thereof. The above and other features and advantages will become more apparent from the detailed description of the exemplary embodiments taken in conjunction with the accompanying drawings, in which:

[0024] Figure 1 FIG. 1 is a flowchart of a risk prompting method according to an exemplary embodiment of the present application.

[0025] Figure 2 FIG. 2 is a flowchart of a risk prompting method according to another exemplary embodiment of the present application.

[0026] Figure 3 FIG. 3 is a structural diagram of a risk prompting device according to an exemplary embodiment of the present application.

[0027] Figure 4is a block diagram of a vehicle for risk prompt provided by an example embodiment of the present application. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0029] Currently, after the large-scale operation of new energy vehicles, the insulation failure of high-voltage systems gradually exposes three characteristics of high frequency, concealment and disastrous consequences. The inducement is highly fragmented, such as aging and water seepage of high-voltage connector sealing ring, micro-seepage of cooling liquid pipe joint, high-voltage component internal copper or pin loosening under the coupling action of thermal cycle and mechanical vibration, etc. Any single factor is enough to make the insulation resistance from megohm level to below the critical value.

[0030] Because the high-voltage loop voltage platform has generally risen to 400V-800V, once the insulation is broken down, the energy release can form an arc channel in milliseconds, which may cause the fuse and the contactor contact to be ablated, the vehicle to be instantly reported as a fault and enter a limping or stalled state; or the fire along the cabin wire bundle groove and the air conditioner air duct at high speed, the vehicle can be burned to incandescence within 3 minutes, and the vehicle body potential is lifted, so that the passengers touching the door handle can be shocked by the step voltage, and the rescue difficulty is doubled.

[0031] The current industry's insulation fault clearing method for new energy vehicle high-voltage systems is automatic clearing (i.e., fault response when the fault exists, and the vehicle automatically returns to normal state after the fault disappears) or KL15 cycle clearing (i.e., in a complete cycle of the ignition switch from OFF to ON and then back to OFF, the KL15 signal completes a power-on-power-off process), that is, once the fault occurs, the vehicle immediately starts the fault response mode and remains until the KL15 power-off of this time, and if the fault has disappeared, the vehicle will automatically restore to normal after power-on again.

[0032] Users (also known as vehicle owners or drivers) generally do not actively check the vehicle unless they have no choice when using the vehicle. That is, the vehicle often experiences multiple cycles of "insulation alarm-automatic clearing-continue driving", and the user does not feel the continuous alarm and lacks high-voltage safety knowledge. In this case, the above clearing method for insulation faults, the insulation resistance is frequently pulled down, but the user will not check the system for maintenance, until the vehicle has a serious accident, such as vehicle fire, personnel electric shock, etc.

[0033] To solve the above problems, the embodiment of the present application provides a risk prompting method, and various non-limiting embodiments of the present application will be specifically introduced below with reference to the drawings.

[0034] Figure 1 FIG. 1 is a flowchart of a risk prompting method provided by an exemplary embodiment of the present application. Figure 1 The method of FIG. 1 is executed by a computing device, for example, a processor of a vehicle. As shown in FIG. 1, the risk prompting method includes the following contents. Figure 1

[0035] It should be noted that the vehicle of the embodiment of the present application can be a new energy vehicle, for example, an electric vehicle.

[0036] S110: Obtain an insulation resistance value of a high-voltage system of a vehicle and a risk threshold value.

[0037] Specifically, the insulation resistance value of the high-voltage system of the vehicle can be understood as the electrical "isolation degree" between the high-voltage loop and the vehicle body (ground), which is equivalent to connecting a large resistance that cannot be seen between the high-voltage positive, high-voltage negative and the metal vehicle frame. The larger the resistance, the less the high-voltage leakage, the safer it is. The vehicle can be provided with an insulation monitoring device (IMD) between the high-voltage loop and the vehicle body ground for real-time measurement of the insulation resistance value between the positive and negative bus bars.

[0038] The risk threshold value can be flexibly set according to actual needs, and the unit of the risk threshold value can be kilo-ohm (KΩ). For example, the risk threshold value can be set to 50KΩ or 100KΩ, which is not limited in the embodiment of the present application.

[0039] Preferably, the risk threshold value is set to 50KΩ in the embodiment of the present application.

[0040] S120: In a case where the cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches different preset numbers within a preset time range, a preset mode corresponding to the preset number is used to issue a warning prompt to a user.

[0041] In an embodiment, the preset mode includes a mode of limiting the function of the vehicle and / or issuing a warning to the user. Specifically, the preset mode includes a repair phone reminder, a display screen of the vehicle displaying repair information, a warning light prompt, a warning sound prompt (for example, a vehicle voice broadcast mode) and / or a high-voltage power prohibition to make the vehicle unable to travel.

[0042] Specifically, the preset time range can be one month (i.e., a natural month), 35 days, etc., which is not limited in the embodiment of the present application.

[0043] Preferably, the preset time range is one month, i.e., a natural month.​

[0044] The cumulative number of times is the number of times when the cumulative insulation resistance value is less than the risk threshold (for example, 50 kΩ), that is, each time "insulation resistance is less than 50 kΩ" occurs, 1 is added, and the last day of each month at 23:59 is automatically cleared.

[0045] The preset number of times can include a first preset threshold, a second preset threshold, and a third preset threshold, and in terms of numerical value, the third preset threshold is less than the first preset threshold, which is less than the second preset threshold. That is, by the preset number of times (also referred to as risk frequency), the risk can be divided into three levels, for example, the risk level corresponding to the third preset threshold is level one, for example, the level one threshold is 5 times / month; the risk level corresponding to the first preset threshold is level two, for example, the level two threshold is 10 times / month; and the risk level corresponding to the second preset threshold is level three, for example, the level three threshold is 20 times / month. It should be noted that the risk threshold and the preset number of times can be optimized based on the background big data of different architectures and vehicle model projects to improve their reliability, and the data values of the risk threshold and the preset number of times are not limited in the embodiments of the present application.

[0046] In an embodiment, the preset number of times has a corresponding relationship with the preset manner, that is, different preset numbers of times correspond to different preset manners (i.e., prompt manners).

[0047] For example, in the case where the cumulative number of times when the insulation resistance value is lower than the risk threshold reaches the third preset threshold, the maintenance information is prompted to the user through the instrument in the form of a pop-up window. The maintenance information is used to prompt the user to maintain the fault on the display screen of the vehicle in the form of a pop-up window.

[0048] For another example, in the case where the cumulative number of times when the insulation resistance value is lower than the risk threshold reaches the first preset threshold, the vehicle emergency call system is triggered so that the user receives a maintenance phone call reminder from the operation and maintenance management platform; and / or the display screen displays the maintenance information. The maintenance phone call can be a maintenance phone call made by the staff of the operation and maintenance management platform to the user or the vehicle in which the user is located.

[0049] For another example, in the case where the cumulative number of times when the insulation resistance value is lower than the risk threshold reaches the second preset threshold, high-voltage power-on of the vehicle is prohibited, so that the vehicle cannot run.

[0050] It should be noted that the embodiments of the present application realize a humanized and gradient progressive risk control mode by defining the insulation fault risk level, which not only maximizes the user's demand for using the vehicle, but also takes into account the risk of vehicle fire and electric shock caused by insulation failure.

[0051] Therefore, the embodiment of the application can define the level of insulation failure and different processing methods based on the risk threshold and the risk counting method, form a closed loop of data perception, level determination and forced repair, thereby cutting off the problems of fire and electric shock caused by insulation failure at the sprouting stage, and the embodiment of the application also covers all vehicle scenes such as driving, charging and parking, and systematically reduces the probability of fire and personal injury caused by insulation failure of new energy vehicles.

[0052] In an embodiment of the application, the preset manner includes a repair telephone reminder and / or a display screen of the vehicle displaying repair information, wherein the preset manner corresponding to the different preset number of times when the cumulative number of times that the insulation resistance value is lower than the risk threshold reaches the different preset number of times is used to issue a warning prompt to the user, including: in the case that the cumulative number of times that the insulation resistance value is lower than the risk threshold reaches a first preset threshold, triggering a vehicle emergency call system so that the user receives a repair telephone reminder from an operation and maintenance management platform; and / or in the case that the cumulative number of times that the insulation resistance value is lower than the risk threshold reaches the first preset threshold, the display screen displays repair information.

[0053] In an embodiment, the first preset threshold can be 10.

[0054] Specifically, in the case that the insulation resistance value is lower than the risk threshold (for example, 50kΩ) and the cumulative number of times that the insulation resistance value is lower than the risk threshold exceeds 10 times per month, the vehicle emergency call system (Emergency Call, e-Call) can be triggered, the repair information can be displayed on the display screen of the vehicle, or the repair information can be displayed on the display screen of the vehicle while the vehicle emergency call system is triggered, and the way of reminding the user by the embodiment of the application is not limited.

[0055] The vehicle emergency call system can refer to the e-Call function of the vehicle. The e-Call function can be automatically triggered, for example, in the case that the cumulative number of times that the insulation resistance value of the vehicle is lower than the risk threshold reaches the first preset threshold, the vehicle will automatically send an alarm instruction to establish a voice channel to facilitate direct communication between the user in the vehicle and the staff of the operation and maintenance management platform.

[0056] It should be understood that the insulation resistance value lower than the risk threshold (for example, 50kΩ) is counted as one "overrun" once, that is, the cumulative number is 1. The warning threshold is that the insulation resistance value is lower than the risk threshold and the cumulative number of times exceeds 10 times per month within one month (or one natural month), that is, both conditions must be met at the same time to trigger the vehicle emergency call system and / or the display screen to display repair information.

[0057] In an embodiment, in the case that the accumulated number of times that the insulation resistance value is below the risk threshold value reaches the first preset threshold value, the vehicle sends an alert instruction to the operation and maintenance management platform, and then the user receives a maintenance call made by a staff member of the operation and maintenance management platform. It should be noted that the specific description of this step is described in detail in Figure 2 Embodiments.

[0058] In an embodiment, in the case that the accumulated number of times that the insulation resistance value is below the risk threshold value reaches the first preset threshold value, the display screen displays the maintenance information. The display screen can be an instrument panel or a central control large screen of the vehicle. For example, the maintenance information can be presented in the form of a pop-up window in the instrument panel of the vehicle, or in the form of a pop-up window in the central control large screen of the vehicle, so as to ensure that the user can timely obtain the risk warning information.

[0059] The pop-up window can be displayed in the center of the display screen or in the top status bar of the display screen, and the pop-up window can include a title, a body, and an icon, and the like. The content of the pop-up window is not limited in the embodiments of the present application. For example, the title of the pop-up window is high-voltage insulation serious abnormality, the body is that the insulation resistance has been below 50 kΩ for 10 times, please repair in the store as soon as possible, and the icon is in the style of an orange high-voltage symbol and a wrench.

[0060] In addition, the pop-up window can be popped up immediately during driving of the vehicle, and by default, the pop-up window stays for a preset time (for example, 15 seconds) and can be manually closed by the OK key of the steering wheel. At the same time, the status bar icon is always on until the monthly count is less than 10 times or the monthly count is cleared at the end of the month; the central control large screen synchronously displays a banner prompt.

[0061] Therefore, in the case that the insulation resistance value is below the risk threshold value and the accumulated number of times reaches the first preset threshold value (for example, 10 times) within a natural month, the embodiments of the present application synchronously trigger the vehicle emergency call and / or the instrument panel pop-up window. The e-Call function is immediately connected to the operation and maintenance management platform, so as to ensure that the user does not miss the maintenance call, the display screen displays the maintenance information, and a “voice + vision” dual alert is formed. This not only greatly improves the user's awareness of high-voltage hidden dangers, but also enhances the trust through official outbound calls, avoids the traditional prompt being ignored, and thus prevents the insulation failure from being forced to be locked before the power is turned off, and reduces the risk of electric shock, arc and subsequent recall.

[0062] Figure 2 is a flowchart of a risk prompt method provided by another exemplary embodiment of the present application. Figure 2 The embodiment is a further limitation of the step “in the case that the accumulated number of times that the insulation resistance value is below the risk threshold value reaches the first preset threshold value, trigger the vehicle emergency call system, so as to facilitate the user to receive the maintenance call reminder from the operation and maintenance management platform” in the above-mentioned embodiments, as Figure 2 shown, the risk prompt method further includes the following content.

[0063] S210: In the case where the accumulated number of times reaches the first preset threshold, an alert instruction is sent to the operation and maintenance management platform.

[0064] Specifically, the vehicle processor immediately wakes up the e-Call function of the vehicle in the case where the accumulated number of times reaches 10, packs an alert instruction, and sends it to the operation and maintenance management platform through a 4G / 5G network. The alert instruction includes the identity information of the vehicle, such as the vehicle identification (ID). The alert information is used to remind the staff of the operation and maintenance management platform to call the repair phone to the vehicle or the user (or driver) of the vehicle that sends the alert instruction.

[0065] Further, the operation and maintenance management platform automatically generates a work order after receiving the alert instruction, and sends the work order to the staff of the operation and maintenance management platform. The staff calls the repair phone to the user or the vehicle where the user is located within a preset time period (for example, 15 seconds or 30 seconds) after receiving the work order.

[0066] S220: Receive the repair phone call made by the staff of the operation and maintenance management platform.

[0067] If the first call is not connected, the staff can initiate a second call with an interval of, for example, 5 minutes, and push repair information to the vehicle-mounted application.

[0068] It should be noted that the insulation failure risk is level two: the insulation failure risk threshold is set to 50KΩ, the preset number (or risk frequency) is 10 times per month, and when the insulation resistance of the high-voltage system is lower than the risk threshold (50kΩ) for more than 10 times per month, the vehicle e-Call function is automatically triggered, and the user is contacted by the background operation and maintenance personnel to remind the user that the vehicle high-voltage system has a serious insulation problem and needs to be maintained as soon as possible. The fault clearing method is KL15 cycle clearing.

[0069] As can be seen, the embodiment of the present application can actively trigger remote manual intervention before the insulation failure accumulates to a dangerous level, significantly reducing the risk of vehicle breakdown and safety caused by high-voltage leakage.

[0070] In an embodiment of the present application, the preset manner includes prohibiting high-voltage power-up so that the vehicle cannot run, and in the case where the accumulated number of times that the insulation resistance value is lower than the risk threshold reaches different preset numbers, a preset manner corresponding to the preset number is used to issue a warning prompt to the user, including: in the case where the accumulated number of times that the insulation resistance value is lower than the risk threshold reaches a second preset threshold, high-voltage power-up to the vehicle is prohibited.

[0071] In an embodiment, the second preset threshold can be 20.

[0072] Specifically, in the case that the insulation resistance value is lower than the risk threshold (for example, 50 kΩ) and the cumulative number of times that the insulation resistance value is lower than the risk threshold exceeds 20 times per month, high-voltage power-up of the vehicle is prohibited, so that the vehicle cannot normally travel. It should be understood that a single time that the insulation resistance value is lower than the risk threshold counts as one "out-of-limit", that is, the cumulative number is 1. The early warning threshold is that the insulation resistance value is lower than the risk threshold and the cumulative number of times exceeds 20 times per month within one month (or one natural month), that is, both conditions must be met at the same time to trigger the occurrence of the high-voltage prohibition.

[0073] The manner of prohibiting high-voltage power-up can be achieved by controlling a relay, for example, immediately opening the main positive and main negative relays, canceling the pre-charging process, and at the same time, latching the high-voltage relay closed (that is, "HV_Relay_Allow = 0") until the fault code (Diagnostic Trouble Code, DTC) is manually cleared. It should be noted that the controller of the vehicle will not output a relay attraction signal, the high-voltage battery and the high-voltage components such as the motor, the DC-DC converter (DCDC), and the air conditioner are physically disconnected, the vehicle is in a no-high-voltage state, and cannot be READY or travel.

[0074] It should be noted that in the case that the cumulative number of times that the insulation resistance value is lower than the risk threshold reaches a second preset threshold (for example, 20 times), the prohibition of high-voltage power-up of the vehicle can also be accompanied by warning prompts to the user through the instrument panel, the buzzer, and the signal light. For example, a pop-up window with an area of 4 inches is presented in the instrument panel, which can include text such as "insulation failure, vehicle cannot travel, please contact the after-sales service station" and a red high-voltage symbol. For another example, the buzzer provides a sound prompt of 2 kHz for 2 seconds, with an interval of 1 second, and a cycle of 10 times; and the double-flash light flashes synchronously at 1 Hz, reminding people outside the vehicle that the vehicle is in a fault state.

[0075] For the consequences and clearing methods, the user (i.e., the vehicle owner) drags the vehicle to the after-sales 4S store for maintenance, and the staff in the store uses a diagnostic instrument to perform "Clear DTC" and high-voltage power-off for 5 minutes, and actually measures the insulation resistance value to exceed the risk threshold (for example, 50 kΩ) and lasts for 30 seconds, and then re-ignites the power-up, and after the vehicle self-checks no insulation failure, the high-voltage relay permission is set to 1, the pop-up window prompted by the instrument panel is extinguished, and the vehicle resumes normal operation.

[0076] It should be noted that the insulation failure risk is level three: the insulation failure risk threshold is set to 50 KΩ, the preset number (or risk frequency) is 20 times per month, and when the insulation resistance of the high-voltage system is lower than the risk threshold (50 kΩ) more than 20 times per month, high-voltage power-up is prohibited (the vehicle will not be able to be used), and the fault clearing method is manual clearing, so as to force the user to go to the store for maintenance.

[0077] Therefore, the application embodiment sets the cumulative number of times that the insulation resistance value is lower than the risk threshold in a natural month reaching a second preset threshold (for example, 20 times) as a high-voltage locking red line, and once the red line is triggered, the relay is immediately disconnected, power-up is prohibited, and vehicle driving is prohibited, so that the "sick running" risk is completely blocked in the station, serious accidents of the vehicle are avoided, and the probability of after-sales recall is significantly reduced. At the same time, the monthly cumulative mechanism avoids infinite accumulation of historical counts, and ensures that only insulation faults that are truly deteriorating will be locked for high voltage, balancing safety, experience, and operation and maintenance costs.

[0078] In an embodiment of the application, the preset manner includes displaying the maintenance information on a display screen of the vehicle, and the display screen includes an instrument of the vehicle. In a case where the cumulative number of times that the insulation resistance value is lower than the risk threshold reaches different preset numbers of times, a preset manner corresponding to the preset number of times is used to issue a warning prompt to the user, including: in a case where the cumulative number of times that the insulation resistance value is lower than the risk threshold reaches a third preset threshold, the maintenance information is prompted to the user in the form of a pop-up window through the instrument.

[0079] In an embodiment, the third preset threshold can be 5.

[0080] Specifically, the display screen of the vehicle can include an instrument of the vehicle, for example, a full-liquid crystal instrument of the vehicle. The maintenance information can be presented on the instrument of the vehicle in the form of a pop-up window, without relying on a central control large screen or a mobile phone application (APP), so as to ensure that the driver (or user) can obtain the key information in the first time within the range of driving vision.

[0081] The pop-up window can be a modal pop-up window with a semi-transparent black background to ensure that the vehicle speed is not blocked. The pop-up window can include a title, a main text, and an icon, and the application embodiment does not make specific limitations on the contents of the pop-up window. For example, the title of the pop-up window is high-voltage insulation slight anomaly, the main text is that the insulation resistance has been lower than 50kΩ for 5 times, and the icon is in the style of a yellow high-voltage symbol and a wrench.

[0082] In an embodiment, in a case where the insulation resistance value is lower than the risk threshold (for example, 50kΩ) and the cumulative number of times that the insulation resistance value is lower than the risk threshold exceeds 5 times per month, the instrument immediately lights up and pops up the maintenance information in the form of a pop-up window.

[0083] Specifically, a single insulation resistance value lower than the risk threshold (for example, 50kΩ) is counted as one "out of limit", that is, the cumulative number is 1. The warning threshold is that the insulation resistance value is lower than the risk threshold and the cumulative number of times exceeds 5 times per month within one month (or a natural month), that is, both conditions must be met at the same time to trigger the warning prompt.

[0084] For the consequences and the way of clearing, once the fault code DTC is written, the vehicle cannot clear it by itself. The embodiment of the application adopts the automatic clearing mode, wherein the automatic clearing actually refers to "not locking power and not forcibly limiting speed", instead of the automatic disappearance of the DTC. The real clearing must rely on the staff of the operation and maintenance platform (i.e., the after-sales personnel) to manually clear the code after checking the high-voltage circuit and processing the insulation problem by using the diagnostic instrument, and if the number of times of exceeding the limit in the month is still less than 5 times after the code is cleared, the risk state is immediately released, and the maintenance information prompt in the instrument disappears.

[0085] It should be noted that the insulation fault risk is level one: the insulation failure risk threshold is set to 50KΩ, the preset number (or risk frequency) is 5 times per month, and when the insulation resistance of the high-voltage system is lower than the risk threshold (50kΩ) for more than 5 times per month, the instrument prompts the user (or the driver) that the power system has a serious fault, and requests to go to the shop for maintenance, and the fault clearing mode is automatic clearing.

[0086] It can be known that, in the embodiment of the application, the instrument is used as a display screen for prompting maintenance information, and when the insulation resistance value drops below the risk threshold and accumulates to the third preset threshold (for example, 5 times) per month, a first-level early warning is immediately issued in the form of a pop-up window, which not only makes full use of the hardware feature that the driver's forward visual blind area is minimized to ensure that the warning information is seen at the first time, but also prevents the accumulation of historical counting from misreporting by means of the automatic clearing mechanism at the end of the month, so as to balance the safety reminder timeliness and user experience friendliness, and prompt the user to go to the station as soon as possible to check the insulation hidden danger and reduce the risk of high-voltage electric leakage evolving into a serious fault or an electric shock accident.

[0087] In an embodiment of the application, it further includes: receiving the risk of clearing the early warning prompt by the user in a manual or automatic manner.

[0088] Specifically, the vehicle receives the risk of clearing the early warning prompt by the user in a manual or automatic manner. The automatic clearing can refer to not locking power and not forcibly limiting speed, instead of the automatic disappearance of the DTC. The real "clearing" must rely on the after-sales personnel to manually clear the code after checking the high-voltage circuit and processing the insulation problem by using the diagnostic instrument. When the vehicle detects that the number of times of the insulation resistance value being lower than the risk threshold per month is still less than the third preset threshold after the code is cleared, the fault state of the vehicle is immediately released, for example, the maintenance information prompt in the instrument disappears.

[0089] It should be noted that the fault code does not disappear by itself as the next insulation value returns to normal, so the automatic clearing only refers to not continuously limiting power, instead of "self-extinguishing".

[0090] In an embodiment, the automatic clearing includes a KL15 cycle clearing, i.e., an ignition switch "OFF to ON to OFF" once. The whole process does not require a diagnostic instrument or manual intervention, as long as the fault condition has disappeared in the new cycle (i.e., the insulation resistance value is higher than the risk threshold value and the cumulative number does not reach the standard again), the vehicle automatically sets the corresponding DTC and warning position 0, and the instrument extinguishes the warning.

[0091] The manual clearing can refer to that a user (i.e., a vehicle owner) drags the vehicle to an after-sales 4S store for maintenance, a staff in the store executes "Clear DTC" and high-voltage power-off 5 min by using a diagnostic instrument, and actually measures that the insulation resistance value is higher than the risk threshold value (for example, 50 kΩ) and lasts for 30 seconds, and then the vehicle is re-ignited and powered on, and the vehicle sets the high-voltage relay permission to 1 after self-checking no insulation fault, and the pop-up window prompted by the instrument is extinguished, and the vehicle resumes normal.

[0092] Therefore, it can be known that the embodiment of the application allows the user to immediately remove the pop-up window and telephone reminder after the insulation early warning is triggered by using the "one-key code clearing" of the diagnostic instrument in the store, or to automatically extinguish the warning after the natural clearing in the next month or after completing a KL15 cycle and the insulation returning to normal, without forcibly making the vehicle enter the store for maintenance to eliminate the occasional false alarm, significantly reducing unnecessary after-sales station entry and user anxiety, while retaining the closed-loop repair path of the real insulation fault, and taking into account safety, convenience and operation and maintenance cost.

[0093] In an embodiment of the application, the preset time range is one month, and the numerical range of the risk threshold value is 40 kilo-ohms to 100 kilo-ohms.

[0094] Specifically, the risk threshold value can be 40 KΩ, 50 KΩ, 55 KΩ or 100 KΩ, and the embodiment of the application does not make specific limitation thereon.

[0095] Preferably, the embodiment of the application sets the risk threshold value to 50 KΩ.

[0096] It should be noted that the regulatory red line of the risk threshold value is 40 kΩ, and 50 kΩ is equal to leaving a "yellow buffer zone" before "crossing the line" for the driver and the background, which can expose the problems such as moisture, condensation and wire harness wear in advance to avoid alarming only when the true drop to the red line.

[0097] In addition, the risk threshold value is set to 50 kΩ, which is much lower than the actual measured value (a few hundred kΩ to MΩ level) of a normal vehicle, and is not disturbed by humidity transients, and is higher than 40 kΩ, which can make the strategy of "more than 5 times a month for level one alarm" sensitive and not prone to false alarm, and acceptable by the after-sales.

[0098] In an embodiment, the preset time range is one natural month. That is, the insulation monitoring device (IMD) continuously samples the high-voltage system-to-vehicle body insulation resistance value at a frequency of 1 Hz, and writes the sampling events lower than 50 kΩ into the monthly counter in real time. The counter can be automatically cleared at 23:59 on the last day of each month, and re-accumulated.

[0099] Therefore, by setting the risk threshold value to a value between 40 kΩ and 100 kΩ, the embodiment of the application can capture insulation degradation as soon as it occurs, avoid false positives caused by occasional interference, and ensure that vehicles with real potential problems can be screened out in time, thereby realizing early detection, gradual intervention, and closed-loop management of forced maintenance. At the same time, by setting the preset time range to one month and using a monthly counting method, the complexity and storage overhead of the algorithm are reduced.

[0100] Figure 3 Fig. 1 is a structural schematic diagram of a risk prompting device 300 provided by an exemplary embodiment of the application. As shown in the figure, the risk prompting device 300 includes an acquisition module 310 and a prompting module 320. Figure 3

[0101] The acquisition module 310 is configured to acquire an insulation resistance value of a high-voltage system of a vehicle and a risk threshold value; and the prompting module 320 is configured to, in a preset time range, issue a pre-warning prompt to a user in a preset manner corresponding to a preset number of times in a case where a cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches different preset numbers of times.

[0102] The embodiment of the application provides a risk prompting device, which acquires an insulation resistance value of a vehicle and a preset risk threshold value, and in a preset time range, issues a pre-warning prompt to a user in a preset manner corresponding to a preset number of times in a case where a cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches different preset numbers of times, so that the embodiment of the application can define the level of insulation failure and different processing methods based on the risk threshold value and the risk counting method, form a closed loop of data perception, level determination, and forced maintenance, thereby cutting off the problems of insulation failure, fire, and electric shock at the budding stage, and the embodiment of the application also covers all vehicle scenarios such as driving, charging, and parking, thereby systematically reducing the probability of fire and personal injury caused by insulation failure of new energy vehicles.

[0103] ​According to an embodiment of the present application, the preset manner includes a maintenance telephone reminder and / or a display screen of the vehicle displaying maintenance information, wherein the prompt module 320 is configured to trigger the vehicle emergency call system so as to enable the user to receive the maintenance telephone reminder from the operation and maintenance management platform in a case where the cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches a first preset threshold value; and / or the display screen displays the maintenance information in a case where the cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches the first preset threshold value.

[0104] According to an embodiment of the present application, the prompt module 320 is configured to send an alert instruction to the operation and maintenance management platform in a case where it is detected that the cumulative number of times reaches the first preset threshold value; and receive a maintenance telephone call made by a staff of the operation and maintenance management platform.

[0105] According to an embodiment of the present application, the preset manner includes prohibiting high-voltage power-on so that the vehicle cannot run, wherein the prompt module 320 is configured to prohibit high-voltage power-on to the vehicle in a case where the cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches a second preset threshold value.

[0106] According to an embodiment of the present application, the preset manner includes the display screen of the vehicle displaying the maintenance information, and the display screen includes an instrument of the vehicle, wherein the prompt module 320 is configured to prompt the user through the instrument in a pop-up manner in a case where the cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches a third preset threshold value.

[0107] According to an embodiment of the present application, the prompt module 320 is configured to receive the risk that the user clears the early warning prompt in a manual or automatic manner.

[0108] According to an embodiment of the present application, the preset time range is one month, and the numerical range of the risk threshold value is 40 kilo-ohms to 100 kilo-ohms.

[0109] It should be understood that the specific working processes and functions of the acquisition module 310 and the prompt module 320 in the above embodiments can refer to the descriptions of the risk prompting method provided in the above Figure 1 and Figure 2 embodiments, and thus will not be described here again in order to avoid repetition.

[0110] Figure 4 is a block diagram of the vehicle 400 for risk prompting provided in an exemplary embodiment of the present application.

[0111] Referring to Figure 4 , the vehicle 400 includes a processing assembly 410, which further includes one or more processors, and a memory resource represented by a memory 420, for storing instructions executable by the processing assembly 410, such as an application program.

[0112] The application programs stored in the memory 420 can include one or more than one module each corresponding to a set of instructions. In addition, the processing component 410 is configured to execute the instructions to perform the method of risk prompting described above.

[0113] The vehicle 400 can further include a power component configured to perform power management of the vehicle 400, a wired or wireless network interface configured to connect the vehicle 400 to a network, and an input / output (I / O) interface. The vehicle 400 can be operated based on an operating system stored in the memory 420, such as Windows Server TM , Mac OS X TM , Unix TM , Linux TM , FreeBSD TM or the like.

[0114] A non-transitory computer readable storage medium, when the instructions in the storage medium are executed by the processor of the vehicle 400 described above, enable the vehicle 400 described above to perform a method of risk prompting, comprising: obtaining an insulation resistance value of a high-voltage system of the vehicle and a risk threshold value; in a case where the cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches different preset numbers within a preset time range, issuing a warning prompt to a user in a preset manner corresponding to the preset number, wherein the preset manner includes limiting the function of the vehicle and / or issuing an alert to the user.

[0115] The embodiments of the present application also provide a computer program product, comprising a computer program for performing the steps of the method of risk prompting described in the method embodiments described above, specifically comprising: obtaining an insulation resistance value of a high-voltage system of the vehicle and a risk threshold value; in a case where the cumulative number of times that the insulation resistance value is lower than the risk threshold value reaches different preset numbers within a preset time range, issuing a warning prompt to a user in a preset manner corresponding to the preset number, wherein the preset manner includes limiting the function of the vehicle and / or issuing an alert to the user.

[0116] The computer program product can be specifically implemented by hardware, software or a combination thereof. In one optional embodiment, the computer program product is specifically embodied as a computer storage medium, and in another optional embodiment, the computer program product is specifically embodied as a software product, such as a software development kit (Software Development Kit, SDK) and the like.

[0117] All the optional technical solutions described above can be combined in any manner to form optional embodiments of the present application, which will not be described one by one here.

[0118] Those skilled in the art can clearly understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software 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 the present application.

[0119] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0120] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are merely schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0121] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0122] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit.

[0123] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program check codes.

[0124] It should be noted that in the description of the present application, the terms "first", "second", "third" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0125] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for risk warning, characterized in that, include: Obtain the insulation resistance value and risk threshold of the vehicle's high-voltage system; If, within a preset time range, the cumulative number of times the insulation resistance value is lower than the risk threshold reaches a different preset number, a warning prompt will be issued to the user in a preset manner corresponding to the preset number of times. The preset manner includes restricting the functions of the vehicle and / or issuing a warning to the user.

2. The risk warning method according to claim 1, characterized in that, The preset methods include maintenance telephone reminders and / or the vehicle's display screen showing maintenance information. Wherein, if the cumulative number of times the insulation resistance value is lower than the risk threshold reaches different preset numbers, a warning prompt will be issued to the user in a preset manner corresponding to the preset number of times, including: If the cumulative number of times the insulation resistance value is lower than the risk threshold reaches a first preset threshold, the vehicle emergency call system is triggered so that the user receives a maintenance call reminder from the operation and maintenance management platform; and / or, When the cumulative number of times the insulation resistance value is lower than the risk threshold reaches the first preset threshold, the display screen shows the maintenance information.

3. The risk warning method according to claim 2, characterized in that, When the cumulative number of times the insulation resistance value is lower than the risk threshold reaches a first preset threshold, the vehicle emergency call system is triggered so that the user can receive the maintenance call reminder from the operation and maintenance management platform, including: If the cumulative number of times is detected to have reached the first preset threshold, a warning instruction is sent to the operation and maintenance management platform; The system receives maintenance calls from staff members of the operation and maintenance management platform.

4. The risk warning method according to claim 1, characterized in that, The preset method includes preventing high-voltage power from being supplied, thus rendering the vehicle unable to move. Wherein, if the cumulative number of times the insulation resistance value is lower than the risk threshold reaches different preset numbers, a warning prompt will be issued to the user in a preset manner corresponding to the preset number of times, including: When the cumulative number of times the insulation resistance value is lower than the risk threshold reaches a second preset threshold, high-voltage power supply to the vehicle is prohibited.

5. The risk warning method according to claim 1, characterized in that, The preset method includes displaying maintenance information on the vehicle's display screen, which includes the vehicle's instrument panel. Wherein, if the cumulative number of times the insulation resistance value is lower than the risk threshold reaches different preset numbers, a warning prompt will be issued to the user in a preset manner corresponding to the preset number of times, including: When the cumulative number of times the insulation resistance value is lower than the risk threshold reaches a third preset threshold, the maintenance information is displayed to the user via a pop-up window on the instrument.

6. The risk warning method according to claim 1, characterized in that, Also includes: The risk of receiving the warning notification from the user, either manually or automatically.

7. The method for risk warning according to any one of claims 1 to 6, characterized in that, The preset time range is one month, and the risk threshold ranges from 40 kilohms to 100 kilohms.

8. A risk warning device, characterized in that, include: The acquisition module is used to acquire the insulation resistance value and risk threshold of the vehicle's high-voltage system. The warning module is used to issue a warning to the user in a preset manner corresponding to the preset number of times the insulation resistance value is lower than the risk threshold within a preset time range. The preset manner includes restricting the functions of the vehicle and / or issuing a warning to the user.

9. A vehicle, characterized in that, include: processor; Memory used to store the processor's executable instructions. The processor is used to execute the risk warning method according to any one of claims 1 to 7.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the risk warning method according to any one of claims 1 to 7.

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