Control method, device and equipment for low-power state of electric vehicle and storage medium

Abstract

The invention discloses a control method, device and equipment for a low-power state of an electric vehicle and a storage medium, and relates to the technical field of electric vehicle control. The method comprises the steps of obtaining a target driving distance corresponding to a current vehicle speed according to an obtained current initial electric quantity value and a current vehicle speed; if the target driving distance is smaller than the obtained target distance, the target driving distance corresponding to each vehicle speed is obtained according to the initial electric quantity value and a preset equivalent power consumption table; and determining a target vehicle speed according to the target driving distance and the target distance corresponding to each vehicle speed. The vehicle speed can be intelligently adjusted according to the current electric quantity state and the target distance of the electric vehicle, the technical problem that the endurance mileage of the electric vehicle is insufficient in the low-electric-quantity state is effectively solved, and the use safety and convenience of the electric vehicle are improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicle power management, and in particular to a method, device, equipment and storage medium for controlling a low-power state of an electric vehicle. Background Art

[0002] With the increasing popularity of pure electric vehicles, the challenges of range and power management in highway driving have become increasingly prominent. While traveling on highways, vehicles often experience a sharp increase in power consumption due to uneven distribution of charging facilities, improper user charging planning, or unexpected operating conditions (such as severe traffic jams, extreme weather, continuous hill climbing, or aggressive driving). The remaining charge (SOC) may not be enough to support the vehicle reaching the next service area, ultimately leading to the risk of a "highway breakdown." Furthermore, the apparent remaining range displayed on existing vehicles (e.g., estimated based on NEDC or CLTC operating conditions) deviates significantly from actual highway power consumption, further exacerbating users' range anxiety.

[0003] Current technologies often rely on static power consumption models or fixed speed limits, failing to dynamically integrate real-time road conditions (such as speed limits), battery state of health (SOH), and distance to target service areas for comprehensive control. For example, while some vehicles have low-battery warning features, they lack proactive intervention mechanisms, making it impossible to extend actual driving range by limiting speed or reducing auxiliary system energy consumption (such as air conditioning power). Furthermore, the decline in available power due to battery aging (i.e., SOH reduction) is not fully incorporated into the remaining power calculation, resulting in inaccurate power estimates. These issues make it difficult to achieve safe and reliable emergency control when the vehicle is low on power, forcing users to face the risk of roadside assistance or emergency stops.

[0004] Therefore, a dynamic, intelligent emergency control solution is urgently needed. By real-time monitoring of key parameters (such as SOC, SOH, road speed limits, and distance to service areas), combined with high-precision energy consumption models and proactive intervention strategies, this solution optimizes vehicle energy distribution and ensures safe arrival at refueling points even in extreme low-battery scenarios. This invention addresses these technical pain points and fills a gap in the existing technology for high-speed, low-battery emergency control for pure electric vehicles. Summary of the Invention

[0005] The present application provides a method, device, equipment and computer-readable storage medium for controlling the low-battery state of an electric vehicle, which can solve the technical problems in the prior art that it is difficult to achieve safe and reliable emergency control of the vehicle when the battery is low, and the user is forced to face the risk of road rescue or emergency parking.

[0006] In a first aspect, an embodiment of the present application provides a method for controlling a low-battery state of an electric vehicle, characterized in that the method for controlling a low-battery state of an electric vehicle includes: Obtaining a target driving distance corresponding to the current vehicle speed based on the obtained current initial power value and the current vehicle speed; If the target driving distance is less than the obtained target distance, obtaining the target driving distance corresponding to each vehicle speed according to the initial power value and a preset equivalent power consumption table; A target vehicle speed is determined based on the target driving distance corresponding to each vehicle speed and the target distance, and the vehicle is controlled to travel at the target vehicle speed.

[0007] In conjunction with the first aspect, in one embodiment, obtaining the target driving distance corresponding to the current vehicle speed based on the obtained current initial power value and the current vehicle speed includes: Get the current SOC value and current vehicle speed; querying a preset SOC value-initial power meter according to the current SOC value to obtain an initial power value corresponding to the current SOC value in the preset SOC value-initial power meter, wherein the preset SOC value-initial power meter is obtained by measuring the current value and voltage value of the power battery bus; Obtaining, according to the current vehicle speed, a unit mileage power consumption corresponding to the current vehicle speed; A target driving distance corresponding to the current vehicle speed is obtained according to the unit mileage power consumption and the initial power value.

[0008] In conjunction with the first aspect, in one embodiment, obtaining, based on the current vehicle speed, the power consumption per unit mileage corresponding to the current vehicle speed includes: Obtaining a preset equivalent power consumption table, wherein the preset equivalent power consumption table is obtained by measuring vehicle speed and power consumption; According to the current vehicle speed, a preset equivalent power consumption table is queried to obtain the unit mileage power consumption corresponding to the current vehicle speed in the preset equivalent power consumption table.

[0009] In conjunction with the first aspect, in one embodiment, obtaining the target driving distance corresponding to the current vehicle speed based on the unit mileage power consumption and the initial power value includes: Correcting the initial power value using a preset SOH coefficient; A target driving distance corresponding to the current vehicle speed is obtained according to the corrected initial power value and the power consumption per unit mileage.

[0010] In conjunction with the first aspect, in one embodiment, obtaining the target driving distance corresponding to each vehicle speed according to the initial power value and a preset equivalent power consumption table includes: By querying a preset equivalent power consumption table, obtaining the unit mileage power consumption corresponding to each vehicle speed in the preset equivalent power consumption table; The target driving distance corresponding to each vehicle speed is obtained according to the initial power value and the unit mileage power consumption corresponding to each vehicle speed.

[0011] In conjunction with the first aspect, in one embodiment, determining the target vehicle speed based on the target driving distances corresponding to the respective vehicle speeds and the target distance includes: comparing the target driving distance corresponding to each of the vehicle speeds with the target distance; Acquire the target driving distance that is greater than or equal to the target distance; A target vehicle speed is determined according to the target driving distance.

[0012] In conjunction with the first aspect, in one embodiment, after comparing the target driving distances corresponding to the vehicle speeds with the target distance, the method further includes: If the target driving distances are all less than the target distance, the target electrical devices are turned off, and the longest target driving distance is determined from the target driving distances, where the target devices include non-essential electrical loads such as car audio, ambient lighting, seat heating and ventilation equipment, and a car refrigerator; According to the farthest target driving distance, a corresponding vehicle speed is obtained, and the vehicle is controlled to travel at the speed.

[0013] In a second aspect, an embodiment of the present application provides a device for controlling a low-battery state of an electric vehicle, characterized in that the device for controlling a low-battery state of an electric vehicle comprises: A first acquisition module is configured to acquire a target driving distance corresponding to the current vehicle speed based on the acquired current initial power value and the current vehicle speed; a second acquisition module, configured to acquire target driving distances corresponding to various vehicle speeds based on the initial power value and a preset equivalent power consumption table if the target driving distance is less than the acquired target distance; The determination module is used to determine a target vehicle speed according to the target driving distance corresponding to each vehicle speed and the target distance, and control the vehicle to travel at the target vehicle speed.

[0014] In a third aspect, an embodiment of the present application provides a control device for the low-battery state of an electric vehicle, wherein the control device for the low-battery state of the electric vehicle comprises a processor, a memory, and a control program for the low-battery state of the electric vehicle stored on the memory and executable by the processor, wherein when the control program for the low-battery state of the electric vehicle is executed by the processor, the steps of the control method for the low-battery state of the electric vehicle as described above are implemented.

[0015] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a control program for the low-battery state of an electric vehicle is stored. When the control program for the low-battery state of the electric vehicle is executed by a processor, the steps of the control method for the low-battery state of the electric vehicle as described above are implemented.

[0016] The beneficial effects of the technical solutions provided in the embodiments of the present application include: By obtaining the target driving distance corresponding to the current vehicle speed based on the current initial battery level and the current vehicle speed, and if the target driving distance is less than the obtained target distance, the target driving distance corresponding to each vehicle speed is obtained based on the initial battery level and a preset equivalent power consumption table, and the target speed is determined based on the target driving distance corresponding to each vehicle speed and the target distance, and the vehicle is controlled to travel at the target speed, effectively reducing vehicle energy consumption. This method ensures that the vehicle can safely reach the service area for charging, avoids the risk of being stranded on the highway due to exhaustion, and solves users' concerns about high-speed endurance, improving the user experience and safety of electric vehicles on highways. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a flow chart of an embodiment of a method for controlling a low-battery state of an electric vehicle according to the present application; Figure 2 This is a functional module diagram of an embodiment of a control device for a low-battery state of an electric vehicle according to the present application; Figure 3 This is a schematic diagram of the hardware structure of the control device for the low-battery state of an electric vehicle involved in the embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] First, some technical terms in this application are explained to facilitate those skilled in the art to understand this application.

[0020] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0021] In a first aspect, an embodiment of the present application provides a method for controlling a low-battery state of an electric vehicle.

[0022] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the control method for low battery state of an electric vehicle of this application. Figure 1 As shown, the control method for the low power state of an electric vehicle includes: Step S10: obtaining a target driving distance corresponding to the current vehicle speed based on the obtained current initial power value and the current vehicle speed; Specifically, obtaining the target driving distance corresponding to the current vehicle speed based on the obtained current initial power value and current vehicle speed includes: obtaining the current SOC value and the current vehicle speed; querying a preset SOC value-initial power table based on the current SOC value, and obtaining the initial power value corresponding to the current SOC value in the preset SOC value-initial power table, wherein the preset SOC value-initial power table is obtained by measuring the current value and voltage value of the power battery bus; obtaining the unit mileage power consumption corresponding to the current vehicle speed based on the current vehicle speed; obtaining the target driving distance corresponding to the current vehicle speed based on the unit mileage power consumption and the initial power value.

[0023] For example, the current SOC value and current vehicle speed are obtained. The SOC value refers to the battery's state of charge, representing the ratio of the remaining battery charge to the rated charge, usually expressed as a percentage. The current vehicle speed refers to the electric vehicle's steady-state average speed over the past five minutes, measured in km / h, excluding acceleration, deceleration, and parking.

[0024] Based on the current SOC value, query the preset SOC value-initial charge table to obtain the initial charge value corresponding to the current SOC value. The preset SOC value-initial charge table is obtained by measuring the current and voltage values ​​of the power battery busbar. By measuring the current and voltage values ​​of the power battery busbar at different SOC values, the corresponding initial charge value can be calculated, thereby establishing a corresponding relationship between the SOC value and the initial charge value.

[0025] Specific steps to establish the corresponding relationship between SOC value and initial power value: 1. Discharge the power battery from a fully charged state until it is unable to supply power to maintain high-speed vehicle operation (above 95 km / h). Calculate the integral of the product of the current and voltage of the power battery busbar during this process to obtain the total available power of the power battery. 2. Discharge the power battery from a full load state to various SOC values, and calculate the integral value of the product of the current and voltage of the power battery busbar during this process to obtain the power consumption of the power battery during this process; 3. Subtract the power consumption of the power battery discharged from the full load state to each SOC value from the total available power to obtain the initial power value corresponding to each SOC value.

[0026] For example, when the SOC value of a certain model of power battery is 20%, the corresponding initial power value is 5kWh; when the SOC value is 15%, the corresponding initial power value is 3.75kWh; when the SOC value is 10%, the corresponding initial power value is 2.5kWh.

[0027] The above steps are implemented by the preset initial power test experiment: Preparation stage Current and voltage sensors are arranged on the pure electric vehicle power battery bus, electric machine controller, DCDC output terminal, and high-voltage accessories (PTC / EAC), and connected to data acquisition equipment to synchronously collect relevant test data and related data on the vehicle CAN.

[0028] Use AC slow charging to fully charge the vehicle.

[0029] Obtain the vehicle's road sliding resistance and test mass, and set the load on the chassis dynamometer to ensure that the simulated resistance is consistent with the actual road resistance Testing phase The vehicle is first accelerated to 100 km / h and then driven on the chassis dynamometer at a speed maintained at 100±2 km / h until the speed can no longer be maintained at 95 km / h, at which point the test is stopped.

[0030] During the entire test phase, the SOC of the power battery and the current, voltage, vehicle speed and other data of the bus are collected in real time, and the initial remaining power Eremain_initial (SOC) corresponding to a certain SOC is calculated according to the following formula.

[0031]

[0032] in, is the initial remaining power, The time when the test starts, When the test ends, It is the moment when the SOC value is at a specific value.

[0033] The high-speed initial remaining power Eremain_initial (SOC) corresponding to the different SOC values ​​is enumerated, and the following SOC value-initial power table is obtained:

[0034] Specifically, obtaining the unit mileage power consumption corresponding to the current vehicle speed based on the current vehicle speed includes: obtaining a preset equivalent power consumption table, wherein the preset equivalent power consumption table is obtained by measuring the vehicle speed and power consumption; according to the current vehicle speed, querying the preset equivalent power consumption table to obtain the unit mileage power consumption corresponding to the current vehicle speed in the preset equivalent power consumption table.

[0035] For example, the preset equivalent power consumption table is obtained by measuring vehicle speed and power consumption, and is implemented based on the following constant speed test experiment: Preparation stage: Complete the test preparation according to the requirements of the preset initial power test experiment. Test phase During the test, the car's air conditioning remained off and the driving assistance functions were turned on, consistent with actual driving.

[0036] The vehicle shall complete the power consumption test under various constant speed conditions according to the speed and time requirements in the table below. The vehicle shall first accelerate to a constant speed v and then travel on the chassis dynamometer at a constant speed of v±2 km / h. The constant speed shall be maintained for 15 minutes before the test is stopped.

[0037]

[0038] During the entire test phase, the current, voltage, vehicle speed and other data of the power battery bus are collected in real time, and the power consumption per unit mileage under constant speed conditions EC is calculated according to the following formula const_speed,v .

[0039]

[0040] ——The power consumption measured at the busbar end of the power battery during the constant speed test, in wh; ——During the constant speed test, the distance traveled by the vehicle, in km.

[0041] The power consumption per unit mileage corresponding to different vehicle speeds is listed, and the following preset equivalent power consumption table is obtained:

[0042] For example, when the vehicle speed is 60km / h, the corresponding unit mileage power consumption is 8.54kWh / km; when the vehicle speed is 40km / h, the corresponding unit mileage power consumption is 6.10kWh / km. Specifically, obtaining the target driving distance corresponding to the current vehicle speed based on the unit mileage power consumption and the initial power value includes: correcting the initial power value using a preset SOH coefficient; and obtaining the target driving distance corresponding to the current vehicle speed based on the corrected initial power value and the unit mileage power consumption.

[0043] Exemplarily, the initial charge value is corrected using a preset SOH coefficient. The SOH coefficient refers to the battery's state of health, which indicates the battery's health. As the battery ages, its health gradually declines, and the SOH coefficient decreases accordingly.

[0044] For example, the SOH factor of a new battery is 1. After a period of use, the SOH factor may drop to 0.9, indicating that the battery's health status is 90% of its original state.

[0045] Based on the corrected initial power value and the power consumption per mileage, the target driving distance corresponding to the current vehicle speed is obtained. The target driving distance can be calculated using the following formula: Target driving distance = corrected initial power value / (power consumption per unit mileage * 1.15) For example, if the corrected initial power value is 4.5 kWh and the power consumption per mileage is 0.15 kWh / km, the target driving distance is 30 km.

[0046] Step S20: If the target driving distance is less than the acquired target distance, the target driving distance corresponding to each vehicle speed is acquired according to the initial power value and a preset equivalent power consumption table; Exemplarily, the target distance refers to the distance the electric vehicle needs to travel. It can be the distance to the destination set by the user or a distance calculated by the system based on navigation information. For example, the target distance is the distance to the next available charging station or the next recharging location set by the user. Ensuring that the vehicle can reach the next service station or recharging location is sufficient. For longer distances to the destination, multiple recharging intervals are possible. If the target distance calculated in step 1 is less than the target distance, it indicates that the electric vehicle's remaining charge is insufficient to support the vehicle's destination at the current speed, and the vehicle speed needs to be adjusted to extend the driving distance.

[0047] Specifically, obtaining the target driving distance corresponding to each vehicle speed based on the initial power value and the preset equivalent power consumption table includes: obtaining the unit mileage power consumption corresponding to each vehicle speed in the preset equivalent power consumption table by querying the preset equivalent power consumption table; obtaining the target driving distance corresponding to each vehicle speed based on the initial power value and the unit mileage power consumption corresponding to each vehicle speed.

[0048] Exemplarily, the power consumption per mileage corresponding to each vehicle speed in the preset equivalent power consumption table is obtained by querying the preset equivalent power consumption table. The preset equivalent power consumption table records the power consumption per mileage at multiple different vehicle speeds, for example, the power consumption per mileage at different vehicle speeds such as 10 km / h, 20 km / h, and 30 km / h.

[0049] Based on the initial power value and the power consumption per mileage corresponding to each vehicle speed, the target driving distance corresponding to each vehicle speed is obtained. For each vehicle speed, the corresponding target driving distance can be calculated using the following formula: Target driving distance = initial battery value * SOH coefficient / (power consumption per unit mileage * 1.15), where 1.15 is the power consumption correction factor.

[0050] For example, assuming the initial power value is 5kWh and the SOH coefficient is 0.9, the corrected initial power value is 4.5kWh. For different vehicle speeds, the target driving distances are calculated as follows: - The vehicle speed is 60 km / h, the unit mileage power consumption is 0.15 kWh / km, and the target driving distance is 26.1 km; - The vehicle speed is 40 km / h, the unit mileage power consumption is 0.12 kWh / km, and the target driving distance is 32.6 km; - The vehicle speed is 20 km / h, the power consumption per mile is 0.1 kWh / km, and the target driving distance is 39.1 km.

[0051] Step S30: determining a target vehicle speed according to the target driving distances corresponding to the respective vehicle speeds and the target distance, and controlling the vehicle to travel at the target vehicle speed.

[0052] Specifically, determining the target vehicle speed based on the target driving distance corresponding to each vehicle speed and the target distance includes: comparing the target driving distance corresponding to each vehicle speed with the target distance; obtaining the target driving distance that is greater than or equal to the target distance; and determining the target vehicle speed based on the target driving distance.

[0053] For example, the target driving distance corresponding to each vehicle speed is compared with the target distance. The purpose of the comparison is to find the highest vehicle speed that can meet the target distance requirement, so as to improve driving efficiency.

[0054] Obtain target driving distances that are greater than or equal to the target distance. From the target driving distances corresponding to various vehicle speeds, select those that are greater than or equal to the target distance.

[0055] Determine the target speed based on the target driving distance. From the target driving distances that meet the conditions, select the one with the highest corresponding speed as the target speed.

[0056] For example, if the target distance is 35 km, based on the above calculations, the target distances for speeds of 40 km / h and 20 km / h are 37.5 km and 45 km, respectively, both exceeding the target distance of 35 km. The higher speed of 40 km / h is selected as the target speed, and the calculated results are communicated to the driver (e.g., to reach the target refueling minimum, the vehicle speed must not exceed target speed XXX). Upon driver approval, the vehicle is controlled to maintain the target speed, provided there is sufficient distance ahead. Dynamics are also limited based on the target speed. For target speeds of 100 km / h and above, dynamics are unlimited. For target speeds between 60 and 100 km / h, the maximum power output of the drive motor is limited to 0.7 Pmax. For target speeds below 60 km / h, the maximum power output of the drive motor is limited to 0.5 Pmax to reduce acceleration energy consumption and extend driving range. The driver can proactively intervene to control braking or acceleration at any time based on current traffic conditions.

[0057] Specifically, after comparing the target driving distances corresponding to each of the vehicle speeds with the target distance, the method further includes: if the target driving distances are all less than the target distance, turning off the target electrical equipment, and determining the farthest target driving distance from the target driving distances, wherein the target equipment includes non-essential electrical loads such as car audio, ambient lights, seat heating and ventilation equipment, and car refrigerators; according to the farthest target driving distance, obtaining the corresponding vehicle speed, and controlling the vehicle to travel at the speed.

[0058] Exemplarily, if the target driving distances are all less than the target distances, the target electrical devices are turned off, and the longest target driving distance is determined from the target driving distances, where the target devices include non-essential electrical loads such as car audio, ambient lighting, seat heating and ventilation equipment, and car refrigerators. Turning off these electrical devices can reduce energy consumption and further extend the driving distance. The driver is also notified that the vehicle is at risk of running out of power and needs to find the nearest charging point as soon as possible (such as the nearest service area or exiting the highway midway) and redetermine the target distance. The redetermined target distance is the distance between the vehicle's current location and the nearest charging point. The new target speed is determined based on the newly determined target distance, and the vehicle is controlled to travel at the new target speed.

[0059] Control the vehicle to travel at the target speed. This can be achieved by adjusting the motor output power, limiting the accelerator pedal response, and other methods to control the vehicle to travel at the target speed to ensure that the electric vehicle can reach the destination safely.

[0060] In this embodiment, a target driving distance corresponding to the current vehicle speed is obtained based on the obtained current initial power value and the current vehicle speed; if the target driving distance is less than the obtained target distance, the target driving distance corresponding to each vehicle speed is obtained based on the initial power value and a preset equivalent power consumption table; According to the target driving distance corresponding to each speed and the target distance, the target speed is determined, and the vehicle is controlled to travel according to the target speed, which effectively solves the technical problem of insufficient cruising range of electric vehicles in the low-battery state and improves the safety and convenience of electric vehicles.

[0061] In a second aspect, an embodiment of the present application also provides a control device for a low-battery state of an electric vehicle.

[0062] In one embodiment, referring to Figure 2 , Figure 2 This is a functional module diagram of an embodiment of a control device for low-battery state of an electric vehicle according to the present application. Figure 2 As shown, the control device for the low-battery state of the electric vehicle includes: The first acquisition module 01 is used to acquire a target driving distance corresponding to the current vehicle speed based on the acquired current initial power value and the current vehicle speed; The second acquisition module 02 is configured to acquire the target driving distance corresponding to each vehicle speed according to the initial power value and a preset equivalent power consumption table if the target driving distance is less than the acquired target distance; The determination module 03 is used to determine a target vehicle speed according to the target driving distance corresponding to each vehicle speed and the target distance, and control the vehicle to travel at the target vehicle speed.

[0063] Furthermore, in one embodiment, the first obtaining module 01 is further configured to: Obtaining a target driving distance corresponding to the current vehicle speed based on the obtained current initial power value and the current vehicle speed; If the target driving distance is less than the obtained target distance, obtaining the target driving distance corresponding to each vehicle speed according to the initial power value and a preset equivalent power consumption table; A target vehicle speed is determined based on the target driving distance corresponding to each vehicle speed and the target distance, and the vehicle is controlled to travel at the target vehicle speed.

[0064] Furthermore, in one embodiment, the first acquisition module 01 is further configured to: Obtaining a preset equivalent power consumption table, wherein the preset equivalent power consumption table is obtained by measuring vehicle speed and power consumption; According to the current vehicle speed, a preset equivalent power consumption table is queried to obtain the unit mileage power consumption corresponding to the current vehicle speed in the preset equivalent power consumption table.

[0065] Furthermore, in one embodiment, the first acquisition module 01 is further configured to: Correcting the initial power value using a preset SOH coefficient; A target driving distance corresponding to the current vehicle speed is obtained according to the corrected initial power value and the power consumption per unit mileage.

[0066] Furthermore, in one embodiment, the first acquisition module 01 is further configured to: By querying a preset equivalent power consumption table, obtaining the unit mileage power consumption corresponding to each vehicle speed in the preset equivalent power consumption table; The target driving distance corresponding to each vehicle speed is obtained according to the initial power value and the unit mileage power consumption corresponding to each vehicle speed.

[0067] Furthermore, in one embodiment, the second acquisition module 02 is configured to: comparing the target driving distance corresponding to each of the vehicle speeds with the target distance; Acquire the target driving distance that is greater than or equal to the target distance; A target vehicle speed is determined according to the target driving distance.

[0068] Furthermore, in one embodiment, the determination module 03 is further configured to: If the target driving distances are all less than the target distances, the target electrical devices are turned off, and the longest target driving distance is determined from the target driving distances, wherein the target devices include a seat massage device and a car audio system; According to the farthest target driving distance, a corresponding vehicle speed is obtained, and the vehicle is controlled to travel at the speed.

[0069] Among them, the functional implementation of each module in the above-mentioned electric vehicle low-battery state control device corresponds to the various steps in the above-mentioned electric vehicle low-battery state control method embodiment, and their functions and implementation processes are no longer repeated here.

[0070] In a third aspect, an embodiment of the present application provides a control device for a low-battery state of an electric vehicle. The control device for a low-battery state of an electric vehicle may be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0071] Reference Figure 3 , Figure 3 Schematic diagram of the hardware structure of the control device for low battery state of electric vehicle involved in the embodiment of the present application. In the embodiment of the present application, the control device for low battery state of electric vehicle may include a processor, a memory, a communication interface and a communication bus.

[0072] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0073] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces, used to interconnect components within the electric vehicle's low-battery state control device, as well as interfaces used to interconnect the electric vehicle's low-battery state control device with other devices (such as other computing devices or user devices). Physical interfaces can include Ethernet, fiber optic, and ATM interfaces; user devices can include displays and keyboards.

[0074] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0075] The processor may be a general-purpose processor that can invoke a control program for a low-battery state of an electric vehicle stored in a memory and execute the control method for a low-battery state of an electric vehicle provided in the embodiments of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the control program for a low-battery state of an electric vehicle is invoked can be referenced to the various embodiments of the control method for a low-battery state of an electric vehicle provided in the present application and will not be further described here.

[0076] Those skilled in the art will understand that Figure 3 The hardware structure shown in the figure does not constitute a limitation to the present application and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0077] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0078] The computer-readable storage medium of the present application stores a control program for the low-battery state of an electric vehicle, wherein when the control program for the low-battery state of the electric vehicle is executed by a processor, the steps of the control method for the low-battery state of the electric vehicle as described above are implemented.

[0079] Among them, the method implemented when the control program of the low-battery state of the electric vehicle is executed can refer to the various embodiments of the control method of the low-battery state of the electric vehicle in this application, and will not be repeated here.

[0080] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0081] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0082] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0083] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0084] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0085] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, or the part that contributes to the existing technology, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of this application.

[0086] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for controlling a low-battery state of an electric vehicle, characterized in that: The method for controlling the low battery state of an electric vehicle comprises: Obtaining a target driving distance corresponding to the current vehicle speed based on the obtained current initial power value and the current vehicle speed; If the target driving distance is less than the obtained target distance, obtaining the target driving distance corresponding to each vehicle speed according to the initial power value and a preset equivalent power consumption table; A target vehicle speed is determined based on the target driving distance corresponding to each vehicle speed and the target distance, and the vehicle is controlled to travel at the target vehicle speed.

2. The method for controlling a low-battery state of an electric vehicle according to claim 1, wherein: The step of obtaining a target driving distance corresponding to the current vehicle speed based on the obtained current initial power value and the current vehicle speed includes: Get the current SOC value and current vehicle speed; querying a preset SOC value-initial power meter according to the current SOC value to obtain an initial power value corresponding to the current SOC value in the preset SOC value-initial power meter, wherein the preset SOC value-initial power meter is obtained by measuring the current value and voltage value of the power battery bus; Obtaining, according to the current vehicle speed, a unit mileage power consumption corresponding to the current vehicle speed; A target driving distance corresponding to the current vehicle speed is obtained according to the unit mileage power consumption and the initial power value.

3. The method for controlling a low-battery state of an electric vehicle according to claim 2, wherein: The acquiring, according to the current vehicle speed, the power consumption per unit mileage corresponding to the current vehicle speed includes: Obtaining a preset equivalent power consumption table, wherein the preset equivalent power consumption table is obtained by measuring vehicle speed and power consumption; According to the current vehicle speed, a preset equivalent power consumption table is queried to obtain the unit mileage power consumption corresponding to the current vehicle speed in the preset equivalent power consumption table.

4. The method for controlling a low-battery state of an electric vehicle according to claim 2, wherein: The acquiring, based on the power consumption per unit mileage and the initial power value, a target driving distance corresponding to the current vehicle speed includes: Correcting the initial power value using a preset SOH coefficient; A target driving distance corresponding to the current vehicle speed is obtained according to the corrected initial power value and the power consumption per unit mileage.

5. The method for controlling a low-battery state of an electric vehicle according to claim 1, wherein: The obtaining of target driving distances corresponding to various vehicle speeds according to the initial power value and a preset equivalent power consumption table includes: By querying a preset equivalent power consumption table, obtaining the unit mileage power consumption corresponding to each vehicle speed in the preset equivalent power consumption table; The target driving distance corresponding to each vehicle speed is obtained according to the initial power value and the unit mileage power consumption corresponding to each vehicle speed.

6. The method for controlling a low-battery state of an electric vehicle according to claim 1, wherein: Determining the target vehicle speed according to the target driving distances corresponding to the respective vehicle speeds and the target distance includes: comparing the target driving distance corresponding to each of the vehicle speeds with the target distance; Acquire the target driving distance that is greater than or equal to the target distance; A target vehicle speed is determined according to the target driving distance.

7. The method for controlling a low-battery state of an electric vehicle according to claim 6, wherein: After comparing the target driving distances corresponding to the vehicle speeds with the target distance, the method further includes: If the target driving distances are all less than the target distance, the target electrical devices are turned off, and the longest target driving distance is determined from the target driving distances, where the target devices include non-essential electrical loads such as car audio, ambient lighting, seat heating and ventilation equipment, and a car refrigerator; According to the farthest target driving distance, a corresponding vehicle speed is obtained, and the vehicle is controlled to travel at the speed.

8. A control device for low-battery state of an electric vehicle, characterized in that: The control device for the low-battery state of the electric vehicle comprises: A first acquisition module is configured to acquire a target driving distance corresponding to the current vehicle speed based on the acquired current initial power value and the current vehicle speed; a second acquisition module, configured to acquire target driving distances corresponding to various vehicle speeds based on the initial power value and a preset equivalent power consumption table if the target driving distance is less than the acquired target distance; The determination module is used to determine a target vehicle speed according to the target driving distance corresponding to each vehicle speed and the target distance, and control the vehicle to travel at the target vehicle speed.

9. A control device for a low-battery state of an electric vehicle, characterized in that: The control device for the low-battery state of the electric vehicle includes a processor, a memory, and a control program for the low-battery state of the electric vehicle stored in the memory and executable by the processor, wherein when the control program for the low-battery state of the electric vehicle is executed by the processor, the steps of the control method for the low-battery state of the electric vehicle as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a control program for the low-battery state of an electric vehicle, wherein when the control program for the low-battery state of the electric vehicle is executed by a processor, the steps of the control method for the low-battery state of an electric vehicle according to any one of claims 1 to 7 are implemented.

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