Current sensor fault processing method, device, equipment and computer storage medium

Abstract

The present application discloses a method, device, equipment and computer storage medium for handling current sensor faults. When it is determined that a current sensor in a new energy vehicle fails, the rate of decrease of the wheel-end torque capacity is determined, and the maximum wheel-end torque capacity of the new energy vehicle is controlled to decrease according to the rate of decrease. When it is detected that the maximum wheel-end torque capacity is less than the first wheel-end torque, the new energy vehicle is controlled to power off. According to an embodiment of the present application, when it is determined that a current sensor fails, the maximum wheel-end torque capacity of the vehicle is gradually reduced, so that the vehicle can continue to travel a certain distance, leaving reaction time for the driver, avoiding the potential safety hazard of the vehicle caused by immediate power off, and compared with installing two sets of current sensors, this method is less expensive.

Description

Technical Field

[0001] The present application belongs to the technical field of new energy vehicle fault processing, and in particular, relates to a current sensor fault processing method, device, equipment and computer storage medium. Background Art

[0002] A current sensor is usually installed in the battery management system of a new energy vehicle. The current sensor collects the charge and discharge current of the power battery in the vehicle so as to timely understand the energy exchange status of the power battery based on the charge and discharge current. When the current sensor fails, the battery management system loses the ability to timely understand the current battery energy exchange status. In order to protect the battery, the power battery needs to be powered off. However, if the power is turned off immediately, it will cause great safety hazards to the vehicle while it is in motion and affect the user experience.

[0003] In order to reduce the impact of battery sensor failure, the current method is to install two sets of main and auxiliary current sensors on new energy vehicles. When the main current sensor fails, the auxiliary current sensor is started, so there is no need to cut off the power, which improves safety.

[0004] However, the above method of installing two sets of current sensors, the main and the auxiliary, significantly increases the production and maintenance costs, and when both sets of current sensors fail, it still poses a safety hazard. Therefore, how to reduce the impact of current sensor failure and improve the safety performance of the car is still an important research topic for the safe use of battery systems. Summary of the invention

[0005] The embodiments of the present application provide a current sensor fault processing method, device, equipment and computer storage medium, which can effectively reduce the adverse effects of current sensor failure and improve the safety performance of the vehicle.

[0006] In a first aspect, an embodiment of the present application provides a current sensor fault processing method, comprising:

[0007] When it is determined that a current sensor in a new energy vehicle fails, a rate of decrease of the wheel end torque capacity is determined;

[0008] Control the maximum wheel end torque capacity of the new energy vehicle to decrease according to the above-mentioned decrease rate;

[0009] When it is detected that the maximum wheel-end torque capacity of the new energy vehicle is less than the preset first wheel-end torque, the new energy vehicle is controlled to power off.

[0010] As a possible implementation manner, before determining the rate of decrease of the wheel end torque capacity, the method further includes:

[0011] Determining a target torque, where the target torque is determined according to the current wheel-end torque and the total wheel-end torque capacity of the new energy vehicle;

[0012] Control the maximum wheel-end torque capability of the new energy vehicle to maintain the first duration at the target torque.

[0013] As a possible implementation method, the target torque is determined, including:

[0014] Determine the current wheel end torque of the new energy vehicle;

[0015] Calculate the product of the total wheel-end torque capacity of the new energy vehicle and the first threshold value to obtain a second wheel-end torque;

[0016] The maximum value between the current wheel end torque and the second wheel end torque is used as the target torque.

[0017] As a possible implementation method, determining the rate of decrease of the wheel end torque capacity includes:

[0018] Get the current operating parameters of new energy vehicles;

[0019] The rate of decrease of the wheel end torque capacity is determined according to the current operating parameters.

[0020] As a possible implementation, the above method further includes:

[0021] Detect the speed of new energy vehicles;

[0022] When it is determined that the vehicle speed is less than or equal to the first speed and is maintained for a second time period, the new energy vehicle is controlled to power off.

[0023] As a possible implementation, the above method further includes:

[0024] When it is determined that a current sensor in a new energy vehicle fails, a fault prompt message is output.

[0025] As a possible implementation manner, before determining the rate of decrease of the wheel end torque capacity, the method further includes:

[0026] Detect whether the new energy vehicle is in driving state;

[0027] Determine the rate of decrease in wheel end torque capacity, including:

[0028] When it is determined that the new energy vehicle is in a driving state, the rate of decrease of the wheel end torque capacity is determined.

[0029] In a second aspect, an embodiment of the present application provides a current sensor fault processing device, the device comprising:

[0030] A rate determination unit, used to determine the rate of decrease of the wheel end torque capacity when it is determined that a current sensor in the new energy vehicle fails;

[0031] A torque control unit, used to control the maximum wheel end torque capacity of the new energy vehicle to decrease according to the above-mentioned decrease rate;

[0032] The power-off unit is used to control the new energy vehicle to power off when it is detected that the maximum wheel-end torque capacity of the new energy vehicle is less than a preset first wheel-end torque.

[0033] In a third aspect, an embodiment of the present application provides a current sensor fault processing device, the device comprising: a processor and a memory storing computer program instructions;

[0034] When the processor executes the computer program instructions, it implements the current sensor fault processing method as described in any one of the first aspects.

[0035] In a fourth aspect, an embodiment of the present application provides a computer storage medium, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the current sensor fault handling method as described in any one of the first aspects is implemented.

[0036] In a fifth aspect, an embodiment of the present application provides a computer program product. When instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the current sensor fault handling method as described in any one of the first aspects.

[0037] The present application provides a method, device, equipment and computer storage medium for handling a current sensor fault. When it is determined that a current sensor in a new energy vehicle has failed, the rate of decrease of the wheel-end torque capacity is determined, and the maximum wheel-end torque capacity of the new energy vehicle is controlled to decrease according to the rate of decrease. When it is detected that the maximum wheel-end torque capacity is less than the first wheel-end torque, the new energy vehicle is controlled to power off. When it is determined that the current sensor has failed, the maximum wheel-end torque capacity of the vehicle is gradually reduced in the above manner, so that the vehicle can continue to travel a certain distance, leaving the driver with reaction time, avoiding the potential safety hazard of the vehicle caused by immediate power off, and this method is less expensive than installing two sets of current sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] Figure 1is a schematic diagram of a new energy vehicle control system provided by an embodiment of the present application;

[0040] Figure 2 It is a flowchart of a current sensor fault processing method provided by an embodiment of the present application;

[0041] Figure 3 is a flow chart of a current sensor fault processing method provided by another embodiment of the present application;

[0042] Figure 4 This is a schematic diagram of a maximum wheel-end torque capacity change curve of a new energy vehicle provided by an embodiment of the present application;

[0043] Figure 5 is a schematic diagram of a maximum wheel-end torque capacity change curve of a new energy vehicle provided by another embodiment of the present application;

[0044] Figure 6 is a flow chart of a current sensor fault processing method provided by another embodiment of the present application;

[0045] Figure 7 It is a structural schematic diagram of a current sensor fault processing device provided by an embodiment of the present application;

[0046] Figure 8 It is a structural schematic diagram of a current sensor fault processing device provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0047] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0049] When a current sensor of a new energy vehicle fails, if the power battery is immediately disconnected, the vehicle will lose power immediately. If the vehicle is still moving, it may be dangerous to the vehicle and the passengers in the vehicle because it is in the traffic flow. The existing method of adding a secondary current sensor can reduce the danger and other adverse effects caused by the current sensor failure, but the cost is too high.

[0050] Therefore, in order to solve the problems of the prior art, the embodiments of the present application provide a current sensor fault processing method, device, equipment and computer storage medium.

[0051] The current sensor fault handling method, device, equipment and computer storage medium provided in the embodiments of the present application can be used for fault handling of current sensors in new energy vehicles.

[0052] like Figure 1 As shown, the control system of a new energy vehicle generally includes a battery management system 101 (Battery Management System, BMS), a vehicle control unit 102 (Vehicle Control Unit, VCU) and an instrument control unit module 103 (Instrument Control Module, ICU).

[0053] Before performing fault processing, the current sensor of the new energy vehicle can be diagnosed through the BMS to determine whether the current sensor has a fault. When a fault is determined to have occurred, the VCU can be used to perform fault processing according to the current sensor fault processing method provided in the embodiment of the present application.

[0054] In some embodiments, the specific diagnostic logic when the BMS performs fault diagnosis on the current sensor may include:

[0055] 1). Determine whether the communication between the current sensor and the battery management system BMS is normal (i.e., determine whether there is frame loss in the current signal output by the current sensor received by the battery management system BMS. If there is frame loss, it is determined that the communication is abnormal. If there is no frame loss, it is determined that the communication is normal. If the current sensor communication is abnormal, it is considered that the current sensor has failed.

[0056] 2). Determine whether the current sensor has its own fault, that is, determine whether the current sensor reports its own fault. If the current sensor reports its own fault, it is considered that the current sensor has a fault.

[0057] 3). Determine whether the current value collected by the current sensor exceeds the range, where the range refers to the preset current range. If the actual collected value of the current sensor exceeds its rated collection range, it is considered that the current sensor is faulty.

[0058] 4). Determine whether the collected value of the current sensor remains unchanged for a long time, that is, determine whether the current value carried in the current signal of multiple consecutive frames (such as 5 frames, 10 frames, etc.) received by the current sensor continues to be the same. If the collected value of the current sensor remains unchanged for a long time, it is considered that the current sensor is faulty.

[0059] The following is an introduction to the current sensor fault handling method provided in the embodiment of the present application.

[0060] Figure 2 FIG. 1 is a flow chart of a method for handling a current sensor fault provided by an embodiment of the present application. Figure 2 As shown, the current sensor fault processing method provided in the embodiment of the present application includes the following steps:

[0061] S21. When it is determined that a current sensor in the new energy vehicle fails, the rate of decrease of the wheel end torque capacity is determined.

[0062] S22. Control the maximum wheel-end torque capacity of the new energy vehicle to decrease according to the above-mentioned decrease rate.

[0063] In one example, the maximum wheel-end torque capability of a new energy vehicle is the maximum wheel-end torque that the vehicle can currently provide.

[0064] In one example, when controlling the maximum wheel-end torque capacity to decrease, the VCU can generate corresponding control instructions based on the decrease rate in S21, and control the new energy vehicle through the control instructions, thereby achieving the operation of gradually decreasing the maximum wheel-end torque capacity of the vehicle according to the decrease rate.

[0065] S23. When it is detected that the maximum wheel-end torque capacity of the new energy vehicle is less than the preset first wheel-end torque, the new energy vehicle is controlled to power off.

[0066] Powering off a new energy vehicle usually means disconnecting the power supply circuit of the new energy vehicle so that the power battery therein no longer supplies power.

[0067] In one example, the maximum wheel-end torque capacity of the new energy vehicle can be monitored in real time. When it is determined that the maximum wheel-end torque capacity of the new energy vehicle is less than the first wheel-end torque, a corresponding power-off instruction can be generated to control the power-off of the new energy vehicle. When the maximum wheel-end torque capacity of the new energy vehicle reaches the first wheel-end torque, it means that the vehicle has basically lost power, and it is relatively safe to power off at this time. Among them, the first wheel-end torque can be set according to actual conditions, and is usually relatively small, for example, it can be 800 Nm (for ease of description, Nm is used to represent Nm below).

[0068] The present application provides a method for handling a current sensor fault. When it is determined that a current sensor in a new energy vehicle fails, the rate of decrease of the wheel-end torque capacity is determined, and the wheel-end torque capacity of the new energy vehicle is controlled to decrease according to the rate of decrease. When it is detected that the wheel-end torque capacity is less than the first wheel-end torque, the power battery of the new energy vehicle is controlled to be powered off. The maximum wheel-end torque capacity of a new energy vehicle is usually related to the torque of the drive motor. The greater the torque of the drive motor, the greater the maximum wheel-end torque capacity. The torque of the drive motor is positively correlated with the driving force. It can be seen that the maximum wheel-end torque capacity is also positively correlated with the driving force of the drive motor. Therefore, gradually reducing the maximum wheel-end torque capacity of the new energy vehicle is to gradually reduce the driving force of the new energy vehicle, thereby achieving slow parking. Through the above method, when it is determined that the current sensor fails, the new energy vehicle is controlled to gradually reduce the maximum wheel-end torque capacity, so that the vehicle can continue to travel a certain distance, leaving reaction time for the driver, avoiding the potential safety hazards of the vehicle caused by immediate power-off, and compared with installing two sets of current sensors, this method is lower in cost.

[0069] The specific implementation method of the above S21 is introduced below.

[0070] In one example, the rate of decrease of the wheel end torque capacity may be a preset fixed value. For example, a suitable rate of decrease may be determined in advance based on test data or expert experience, and the rate of decrease may be stored in a preset location. Based on this, when determining the rate of decrease in S21, it may be directly obtained from the above storage location.

[0071] Through the above method, the rate of decrease of the wheel end torque capacity can be quickly determined, and the fault handling efficiency is high.

[0072] In one example, the rate of decrease of the wheel-end torque capacity can be determined based on the current operating parameters of the vehicle. For example, a corresponding table of vehicle operating parameters and decrease rates can be pre-set, and the table can be stored in a specified location. Based on this, when determining the decrease rate in S21, the current operating parameters of the new energy vehicle can be obtained first, and then the corresponding decrease rate can be determined by looking up the table according to the current operating parameters. The operating parameters may include vehicle speed, wheel-end torque, drive motor torque, etc. Further, when determining the decrease rate according to the operating parameters, the current operating parameters of the vehicle can be obtained only once before executing S22, and then a decrease rate is determined according to the obtained current operating parameters, and then the wheel-end torque capacity is controlled to decrease according to the decrease rate in S22. The operating parameters of the vehicle can also be collected in the process of controlling the decrease of the wheel-end torque capacity, and the decrease rate can be adjusted according to the operating parameters. This embodiment of the present application is not specifically limited to this.

[0073] Through the above method, the determined descent rate can be made more consistent with the actual operating conditions of the vehicle, further improving the vehicle safety.

[0074] As another implementation of the present application, in order to give the driver more sufficient parking time and further improve safety, such as Figure 3 As shown, before S21, the following steps are also included:

[0075] S20. Determine a target torque, and control the maximum wheel-end torque capacity of the new energy vehicle to maintain the target torque for a first period of time.

[0076] The target torque may be determined according to the current wheel end torque and the total wheel end torque capacity of the new energy vehicle. The first duration may be set according to actual conditions, for example, 20 seconds.

[0077] In an example, the total wheel-end torque capacity of a new energy vehicle is the maximum wheel-end torque that the new energy vehicle can theoretically provide. It can usually be calculated according to the existing calculation formula based on the peak torque of the drive motor of the new energy vehicle, the speed ratio of the reducer and other technical parameters. This is the existing technology, so it will not be repeated here.

[0078] In one example, because new energy vehicles cannot usually run at the total wheel end torque capacity for a long time, otherwise it may cause overheating, so when determining the target torque, the product of the total wheel end torque capacity of the new energy vehicle and the first threshold can be calculated to obtain the second wheel end torque, and then the current wheel end torque of the new energy vehicle is compared with the second wheel end torque, and the maximum value thereof is taken as the target torque. Among them, the first threshold is a value less than 1, preferably 0.5, because the product of the total wheel end torque capacity and 0.5 is usually the rated torque of the vehicle, and the vehicle can usually run for a long time at the rated torque.

[0079] In one example, the current wheel-end torque of the new energy vehicle can also be generally calculated according to the current parameters of the new energy vehicle according to a preset torque calculation formula. This is also a prior art and will not be described in detail here.

[0080] In the embodiment of the present application, the maximum value between the second wheel-end torque and the current wheel-end torque is taken as the target torque for maintenance, which can avoid the problem of not leaving enough parking time for the driver due to the small current wheel-end torque.

[0081] The following two examples are used to illustrate the change in the maximum wheel-end torque capacity of a new energy vehicle after a current sensor failure occurs.

[0082] For example, when the current sensor fails, the current wheel end torque of the new energy vehicle is 1000Nm, and the second wheel end torque is 3000Nm. The target torque is determined to be 3000Nm, 20 seconds is used as the first duration, and 50Nm / s is used as the rate of decrease of the wheel end torque capacity. The change curve of the maximum wheel end torque capacity of the new energy vehicle can be as follows: Figure 4 shown.

[0083] For example, when the current sensor fails, the current wheel end torque of the new energy vehicle is 5000Nm, and the second wheel end torque is 3000Nm. The target torque is determined to be 5000Nm, 20 seconds is used as the first duration, and 50Nm / s is used as the rate of decrease of the wheel end torque capacity. The change curve of the maximum wheel end torque capacity of the new energy vehicle can be as follows: Figure 5 shown.

[0084] As another implementation of the present application, in order to enable the driver to respond promptly when a fault occurs and further improve safety performance, such as Figure 6 As shown, the current sensor fault processing method may also include:

[0085] S24. When it is determined that a current sensor in the new energy vehicle fails, a fault prompt message is output.

[0086] In one example, outputting the fault prompt information may include turning on a fault indicator light, issuing an instrument warning, issuing a voice warning, etc. The fault indicator light may be a double-jumping light.

[0087] In one example, performing an instrument warning may include sending an instrument warning request to the ICU through the VCU, and the ICU displays warning content in the instrument to prompt the driver to pull over as soon as possible due to a current sensor failure based on the instrument warning request.

[0088] In one example, performing a voice warning may include sending a voice warning request to the ICU through the VCU, and the ICU broadcasts warning content through a voice module to guide the driver to pull over as soon as possible based on the voice warning request.

[0089] As another implementation of the present application, the current sensor fault processing method may further include:

[0090] The speed of the new energy vehicle is detected, and when it is determined that the speed is less than or equal to the first speed and maintained for a second time, the new energy vehicle is controlled to power off. The first speed and the second time can be set according to actual conditions, because the lower the speed of the vehicle, the smaller the impact of power off on it, so the lower the first speed, the better, for example, it can be 2km / s.

[0091] Because the vehicle usually has a low speed when it is parked, it can be considered that the vehicle has stopped when the speed is low. Therefore, it is safer to power off when the speed is low.

[0092] As another implementation of the present application, since usually only a sudden power failure during the driving of the vehicle will cause a greater danger to the vehicle and passengers, the following may also be included before S21:

[0093] Detect whether the new energy vehicle is in a driving state, and if it is determined that the new energy vehicle is in a driving state, execute the fault handling method described in S21-S23. If it is determined that the new energy vehicle is not in a driving state, directly control the new energy vehicle to power off.

[0094] In this way, the fault handling efficiency when the vehicle is not in driving state is improved.

[0095] In one example, whether the vehicle is in a driving state can be determined by detecting the vehicle speed. For example, if the vehicle speed is 0, it is determined that the vehicle is not in a driving state, and if the vehicle speed is not 0, it is determined that the vehicle is in a driving state. Of course, in addition to this method, any other feasible methods can be used to determine whether the vehicle is in a driving state, which will not be listed here one by one.

[0096] Based on the current sensor fault processing method provided in the above embodiment, the present application also provides a specific implementation of the current sensor fault processing device. Please refer to the following embodiment.

[0097] See first Figure 7 The current sensor fault processing device provided in the embodiment of the present application includes the following units:

[0098] The rate determination unit 701 is used to determine the rate of decrease of the wheel end torque capacity when it is determined that a current sensor in the new energy vehicle fails.

[0099] The torque control unit 702 is used to control the maximum wheel end torque capacity of the new energy vehicle to decrease according to the above-mentioned decrease rate.

[0100] The power-off unit 703 is used to control the new energy vehicle to power off when it is detected that the maximum wheel-end torque capacity of the new energy vehicle is less than a preset first wheel-end torque.

[0101] The present application provides a current sensor fault processing device. When it is determined that the current sensor in the new energy vehicle fails, the rate of decrease of the wheel end torque capacity is determined, and the maximum wheel end torque capacity of the new energy vehicle is controlled to decrease according to the rate of decrease. When it is detected that the maximum wheel end torque capacity is less than the first wheel end torque, the power battery of the new energy vehicle is controlled to be powered off. The maximum wheel end torque capacity of the new energy vehicle is usually related to the torque of the drive motor. The greater the torque of the drive motor, the greater the maximum wheel end torque capacity. The torque of the drive motor is positively correlated with the driving force. It can be seen that the maximum wheel end torque capacity is also positively correlated with the driving force of the drive motor. Therefore, gradually reducing the maximum wheel end torque capacity of the new energy vehicle is to gradually reduce the driving force of the new energy vehicle, thereby achieving slow parking. Through the above method, when it is determined that the current sensor fails, the new energy vehicle is controlled to gradually reduce the maximum wheel end torque capacity, so that the vehicle can continue to travel a certain distance, leaving reaction time for the driver, avoiding the vehicle safety hazards caused by immediate power off, and compared with installing two sets of current sensors, this method is lower in cost.

[0102] In one example, the above device may further include:

[0103] The target torque determination unit is used to determine the target torque before determining the rate of decrease of the wheel end torque capacity, wherein the target torque is determined according to the current wheel end torque and the total wheel end torque capacity of the new energy vehicle.

[0104] The torque control unit 702 is also used to control the maximum wheel end torque capacity of the new energy vehicle to maintain the target torque for a first period of time.

[0105] In one example, the target torque determination unit is used to:

[0106] Determine the current wheel end torque of the new energy vehicle;

[0107] Calculate the product of the total wheel-end torque capacity of the new energy vehicle and the first threshold value to obtain a second wheel-end torque;

[0108] The maximum value between the current wheel end torque and the second wheel end torque is used as the target torque.

[0109] In one example, the rate determination unit 701 is configured to:

[0110] Get the current operating parameters of new energy vehicles;

[0111] The rate of decrease of the wheel end torque capacity is determined according to the current operating parameters.

[0112] In one example, the above device may further include:

[0113] Vehicle speed detection unit, used to detect the speed of new energy vehicles;

[0114] The power-off unit 703 is further configured to control the new energy vehicle to power off when it is determined that the vehicle speed of the new energy vehicle is less than or equal to the first speed and is maintained for a second time period.

[0115] In one example, the above device may further include:

[0116] The fault prompt unit is used to output fault prompt information when it is determined that the current sensor in the new energy vehicle has a fault.

[0117] In one example, the above device may further include:

[0118] A state detection unit, used for detecting whether the new energy vehicle is in a driving state before determining the rate of decrease of the wheel end torque capacity;

[0119] The rate determination unit 701 is used to determine the rate of decrease of the wheel end torque capacity when it is determined that the new energy vehicle is in a driving state.

[0120] Figure 8 A schematic diagram of the hardware structure of a current sensor fault processing device provided in an embodiment of the present application is shown.

[0121] The current sensor fault processing device may include a processor 801 and a memory 802 storing computer program instructions.

[0122] Specifically, the processor 801 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0123] The memory 802 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 802 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a tape, or a universal serial bus (USB) drive or a combination of two or more of these. Where appropriate, the memory 802 may include a removable or non-removable (or fixed) medium. Where appropriate, the memory 802 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 802 is a non-volatile solid-state memory. The memory 802 may include a read-only memory (ROM), a random access memory (RAM), a disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical, or other physical / tangible memory storage device. Therefore, typically, the memory 802 includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software including computer executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to one aspect of the present disclosure.

[0124] The processor 801 implements any one of the current sensor fault processing methods in the above embodiments by reading and executing computer program instructions stored in the memory 802 .

[0125] In one example, the current sensor fault processing device may further include a communication interface 803 and a bus 810. Figure 8 As shown, the processor 801, the memory 802, and the communication interface 803 are connected via a bus 810 and communicate with each other.

[0126] The communication interface 803 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0127] Bus 810 includes hardware, software or both, and the parts of online data flow billing equipment are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front-end bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 810 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the application considers any suitable bus or interconnection.

[0128] In addition, in combination with the current sensor fault processing method in the above embodiment, the embodiment of the present application can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any current sensor fault processing method in the above embodiment is implemented.

[0129] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0130] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0131] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0132] Aspects of the present disclosure are described above with reference to the flowchart and / or block diagram of the method, device (system) and computer program product according to the embodiment of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0133] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A method for handling a current sensor fault, characterized in that: include: When it is determined that a current sensor in a new energy vehicle fails, a rate of decrease of the wheel end torque capacity is determined; Controlling the maximum wheel end torque capacity of the new energy vehicle to decrease according to the decrease rate; When it is detected that the maximum wheel-end torque capacity is less than a preset first wheel-end torque, controlling the new energy vehicle to power off; Before determining the rate of decrease of the wheel end torque capacity, the method further includes: Determining a current wheel end torque of the new energy vehicle; Calculating the product of the total wheel-end torque capacity of the new energy vehicle and the first threshold value to obtain a second wheel-end torque; taking the maximum value between the current wheel end torque and the second wheel end torque as the target torque; Controlling the maximum wheel-end torque capacity of the new energy vehicle to maintain the target torque for a first time period; The method further comprises: Detecting the speed of the new energy vehicle; When it is determined that the vehicle speed is less than or equal to the first speed and is maintained for a second time period, the new energy vehicle is controlled to power off.

2. The method according to claim 1, characterized in that The step of determining the rate of decrease of the wheel end torque capacity comprises: Obtaining current operating parameters of the new energy vehicle; The rate of decrease of the wheel end torque capacity is determined according to the current operating parameters.

3. The method according to claim 1, characterized in that The method further comprises: When it is determined that a current sensor in the new energy vehicle fails, a fault prompt message is output.

4. The method according to claim 1, characterized in that: Before determining the rate of decrease of the wheel end torque capacity, the method further includes: Detecting whether the new energy vehicle is in a driving state; Determining the rate of decrease of wheel end torque capacity specifically includes: When it is determined that the new energy vehicle is in a driving state, a decreasing rate of the wheel end torque capacity is determined.

5. A current sensor fault processing device, characterized in that: The device comprises: A rate determination unit, used to determine the rate of decrease of the wheel end torque capacity when it is determined that a current sensor in the new energy vehicle fails; A torque control unit, used for controlling the maximum wheel end torque capacity of the new energy vehicle to decrease according to the decrease rate; A power-off unit, configured to control the new energy vehicle to be powered off when it is detected that the maximum wheel-end torque capacity is less than a preset first wheel-end torque; The device also includes: a target torque determination unit, configured to determine the current wheel end torque of the new energy vehicle before determining the rate of decrease of the wheel end torque capacity; calculate the product of the total wheel end torque capacity of the new energy vehicle and a first threshold value to obtain a second wheel end torque; and use the maximum value of the current wheel end torque and the second wheel end torque as the target torque; The torque control unit is further used to control the maximum wheel end torque capacity of the new energy vehicle to maintain the target torque for a first time period; The device also includes: A vehicle speed detection unit, used to detect the speed of the new energy vehicle; The power-off unit is further used to control the new energy vehicle to power off when it is determined that the vehicle speed is less than or equal to the first speed and is maintained for a second time period.

6. A current sensor fault processing device, characterized in that: The device comprises: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the current sensor fault processing method according to any one of claims 1 to 4 is implemented.

7. A computer storage medium, characterized in that: The computer storage medium stores computer program instructions, and when the computer program instructions are executed by the processor, the current sensor fault processing method according to any one of claims 1 to 4 is implemented.

Images