Electric quantity management method and device in ultra-high-speed driving state of electric vehicle and electric vehicle

Abstract

The invention relates to the technical field of electric vehicles, and provides a power management method and device for an electric vehicle in an ultra-high-speed driving state and the electric vehicle. The method comprises the steps that when the remaining power is within a preset remaining power interval, it is detected that the vehicle is in the ultra-high-speed driving state; if yes, judging whether the residual electric quantity reduction amplitude of the vehicle within the first preset duration is greater than or equal to a preset amplitude threshold value or not; if yes, detecting whether an available charging pile exists in a navigation pre-estimated travelable mileage range of the remaining electric quantity of the vehicle; if yes, according to the current position of the vehicle, calculating whether the difference value between the vehicle navigation estimated travelable mileage and the mileage from the vehicle navigation to the available charging pile is greater than or equal to a preset mileage threshold value or not: if not, sending first user reminding information; when a confirmation request feedback of agreeing to navigate to the nearest charging pile is received, navigating to the nearest charging pile; if not, second user reminding information is sent out, so that the risk of midway feed parking of the vehicle is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a method and device for managing power consumption of an electric vehicle in an ultra-high-speed driving state, and an electric vehicle. Background Art

[0002] In existing pure electric vehicle technology, users are usually prompted only when the power battery is low. This approach ensures that the driver is aware of the battery status to a certain extent. However, due to different speed limits in different countries and regions around the world, pure electric vehicles may face more challenges and potential risks when driving at high speeds. For example, when a vehicle is driving at ultra-high speeds, the power battery may drop rapidly. However, existing systems usually lack targeted reminders and control strategies for this specific scenario. This means that when the vehicle exceeds a certain speed, the battery consumption rate accelerates, but the driver does not receive relevant warnings in time, which may affect driving safety and endurance, and the vehicle may stop midway for power feeding.

[0003] Therefore, how to provide prompts and control power consumption when the battery power of a pure electric vehicle is rapidly decreasing during ultra-high-speed driving is a technical problem currently encountered in the use of electric vehicles and needs to be improved urgently. Summary of the invention

[0004] In view of this, the embodiments of the present application provide a method, device and electric vehicle for managing power when an electric vehicle is driving at ultra-high speed, so as to solve the technical problem of how to reduce the risk of rapid drop in battery power due to ultra-high speed driving of a pure electric vehicle, which may cause the vehicle to stop midway due to power feeding.

[0005] In a first aspect of an embodiment of the present application, a method for managing power in an ultra-high-speed driving state of an electric vehicle is provided, which includes: obtaining the remaining power of the vehicle's power battery; when the remaining power is within a preset remaining power range, detecting that the vehicle is in an ultra-high-speed driving state; if so, determining whether the decrease in the remaining power of the vehicle within a first preset time period is greater than or equal to a preset amplitude threshold; when the decrease in the remaining power is greater than or equal to the preset amplitude threshold, detecting whether there are available charging piles within the navigation estimated drivable mileage range of the vehicle's remaining power; if there are available charging piles, calculating, based on the vehicle's current position, whether the difference between the vehicle's navigation estimated drivable mileage and the vehicle's navigation mileage to the available charging pile is greater than or equal to a preset mileage threshold: if not, issuing a first user reminder message, the first user reminder message including a confirmation request for navigating to the nearest charging pile; when receiving a confirmation request feedback agreeing to navigate to the nearest charging pile, navigating to the nearest charging pile; if there are no available charging piles, issuing a second user reminder message.

[0006] According to a second aspect of an embodiment of the present application, a power management device for an electric vehicle in an ultra-high-speed driving state is provided, which includes: a power acquisition module, configured to acquire the remaining power of a vehicle power battery; a state detection module, configured to detect that the vehicle is in an ultra-high-speed driving state when the remaining power is within a preset remaining power interval; a lower amplitude judgment module, configured to judge whether the decrease amplitude of the remaining power of the vehicle within a first preset time period is greater than or equal to a preset amplitude threshold; a charging pile query module, configured to detect whether there are available charging piles within the navigation estimated drivable mileage range of the vehicle's remaining power when the decrease amplitude of the remaining power is greater than or equal to the preset amplitude threshold; a first control module, configured to calculate whether the difference between the vehicle's navigation estimated drivable mileage and the vehicle's navigation to the available charging pile mileage is greater than or equal to a preset mileage threshold according to the vehicle's current position when there are available charging piles: if not, a first user reminder message is issued, the first user reminder message including a confirmation request for navigating to the nearest charging pile; when a confirmation request feedback for agreeing to navigate to the nearest charging pile is received, navigation is performed to the nearest charging pile; and a second control module is configured to issue a second user reminder message when there are no available charging piles.

[0007] According to a third aspect of an embodiment of the present application, an electric vehicle is provided, including a controller and a battery management system, wherein the controller is connected to the battery management system, and the controller includes at least a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0008] Compared with the prior art, the beneficial effect of the embodiments of the present application is that the power management method for the electric vehicle in the ultra-high-speed driving state detects whether the vehicle is in the ultra-high-speed driving state when the remaining power of the vehicle's power battery is in a preset remaining power range. If so, it determines whether the remaining power decreases by more than a threshold within a first preset time period to detect whether the remaining power decreases rapidly during the ultra-high-speed driving of the vehicle, thereby promptly reminding the user and taking a navigation charging strategy to ensure that the vehicle can be recharged with available charging piles within the estimated mileage range, thereby preventing the vehicle from consuming power quickly due to ultra-high-speed driving and stopping due to exhaustion of power, thereby reducing the risk of the vehicle stopping for power feeding in the middle of the journey. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0010] Figure 1 It is a flow chart of a method for managing power of an electric vehicle in an ultra-high-speed driving state provided by an embodiment of the present application;

[0011] Figure 2 It is a structural schematic diagram of a power management device for an electric vehicle in an ultra-high-speed driving state provided by an embodiment of the present application;

[0012] Figure 3 It is a partial structural schematic diagram of an electric vehicle provided in an embodiment of the present application;

[0013] Figure 4 It is a structural schematic diagram of a controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0014] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0015] See also Figure 1 In the first embodiment of the present application, a method for managing power of an electric vehicle in an ultra-high-speed driving state is provided, comprising the steps of:

[0016] S101, obtaining the remaining power of the vehicle power battery;

[0017] S102, when the remaining power is within a preset remaining power range, detecting that the vehicle is in an ultra-high speed driving state;

[0018] S103, if yes, determine whether the decrease in the remaining power of the vehicle within the first preset time period is greater than or equal to a preset amplitude threshold;

[0019] S104, when the decrease in the remaining power is greater than or equal to a preset threshold, detecting whether there is an available charging pile within the navigation estimated drivable mileage range of the remaining power of the vehicle;

[0020] S105, if there is an available charging pile, calculate whether the difference between the estimated drivable mileage of the vehicle navigation and the mileage of the vehicle navigation to the available charging pile is greater than or equal to a preset mileage threshold according to the current position of the vehicle: if not, send a first user reminder message, the first user reminder message includes a confirmation request for navigating to the nearest charging pile; when receiving a confirmation request feedback for agreeing to navigate to the nearest charging pile, navigate to the nearest charging pile;

[0021] S106: When there is no available charging station, a second user reminder message is sent.

[0022] The working principle of the technical solution provided by this embodiment is as follows: searching on a map or navigation system according to the remaining battery life, determining whether there are available charging piles within the remaining battery life. If there are available charging piles, it means that the vehicle has a place to recharge in time under the current cruising range, and the difference between the estimated drivable mileage based on the vehicle navigation and the mileage of the available charging piles navigated by the vehicle, if the difference is greater than or equal to the mileage threshold, the risk of recharging is low at this time, and there is no need to remind the user or adjust the power control strategy. If the difference is less than the mileage threshold, there is a risk that the vehicle will not be able to drive to the available charging piles in time for recharging, and thus a first user reminder message is sent to the user, requesting the user to confirm whether it is necessary to navigate to the nearest available charging pile for recharging. On the contrary, if there are no available charging piles, it means that the vehicle is at risk of being unable to recharge in time and breaking down, and at this time a reminder is given to the user through a second user reminder message.

[0023] Among them, the navigation estimated mileage of the vehicle's remaining power, that is, the cruising range of the remaining power, is not calculated in a unique way.

[0024] For example, first, get the average energy consumption of the last x trips:

[0025]

[0026] Secondly, the average energy consumption of the current mileage is obtained: V_avg1; it is understandable that the average energy consumption of each vehicle trip can be calculated by dividing the power consumption of each trip by the mileage. More specifically, the power consumption of each trip and the corresponding mileage can be obtained from the vehicle's battery management system and then calculated.

[0027] Furthermore, the average fuel consumption of navigation is calculated based on the average energy consumption of the last x trips and the average energy consumption of the current mileage: Wherein, k1 and k2 are weights of V_avg and V_avg1 respectively, and the weights may be fixed values, for example, k1=0.3 and k2=0.7.

[0028] Finally, the navigation estimated mileage with the remaining battery power is:

[0029] Of course, in practice, the remaining battery life calculated by the battery management system of the battery, that is, the life displayed on the vehicle instrument or screen, can also be used as the estimated drivable mileage for navigation. This embodiment of the present application does not limit this.

[0030] If there is an available charging station within the navigation estimated mileage of the remaining power, the mileage of the vehicle to the available charging station is the mileage estimated by the navigation software or navigation system, which can be directly read from the navigation software or navigation system. Specifically, the mileage difference between the navigation estimated mileage and the mileage of the vehicle to the available charging station is required to be greater than or equal to the preset mileage threshold, which means that the vehicle is required to have a certain amount of remaining power when it arrives at the available charging station to avoid unexpected factors causing the vehicle to be unable to reach the charging station.

[0031] Among them, the mileage threshold is a mileage value. In practice, a fixed mileage threshold can be set according to user experience or test data, or the mileage threshold can be dynamically adjusted according to environmental factors, including but not limited to: checking the ambient temperature outside the vehicle, adjusting the remaining power of the vehicle when it arrives at the available charging pile according to the ambient temperature outside the vehicle, and then calculating the mileage threshold based on the remaining power. For example, the ambient temperature outside the vehicle is obtained, and then it is determined whether the ambient temperature outside the vehicle is greater than the preset temperature threshold of -10°C (it can also be other temperature values). If so, it is required that the remaining power at the charging pile location is ≥3% (it can also be other values ​​in reality), and then the corresponding mileage value is calculated based on the navigation average fuel consumption calculated above, and it is used as the mileage threshold; if not, it is required that the remaining power at the charging pile location is ≥5% (it can also be other values ​​in reality). Similarly, the corresponding mileage value is calculated based on the navigation average fuel consumption calculated above, and it is used as the mileage threshold.

[0032] Assume that the estimated drivable mileage is M_re, the mileage to the charging station is M_re1, and the mileage threshold is M_re3, where: When M_re-M_re1<M_re3, the vehicle automatically pops up a window to the navigation page (and continues to calculate whether M_re-M_re1<M_re3 is true), navigates to the nearest available charging station, and issues a voice reminder: the current battery power is low, whether to navigate to the nearest charging station (i.e., the first user reminder information). Of course, the content of the first user reminder information is not limited to the example content, and the issuance method includes but is not limited to pop-up windows and voice, and can also be other methods, which are not limited in the embodiments of the present application.

[0033] If there is no available charging station within the estimated driving range of the remaining battery, a second user reminder message is sent, for example, a pop-up box prompts: vehicle speed, energy consumption is too high, battery power is decreasing too fast, there is no available charging station nearby, and it is recommended to control the vehicle speed within 100kph. If there is no available charging station during the continuous search, the second user reminder message can be sent every 5 minutes (or other time values).

[0034] According to the technical solution provided in this embodiment, by judging whether the decrease in the remaining power within the first preset time period exceeds the amplitude threshold, it is detected whether the remaining power of the vehicle decreases rapidly during ultra-high-speed driving, so as to promptly remind the user, and adopt a navigation charging strategy to ensure that the vehicle can have available charging piles to replenish power within the estimated mileage range, thereby preventing the vehicle from consuming power quickly due to ultra-high-speed driving and causing the vehicle to run out of power and stop midway, thereby reducing the risk of the vehicle stopping for power feeding midway.

[0035] Specifically, the number of preset remaining power intervals may be one or more. For example, in an optional embodiment, the preset remaining power interval includes at least one of a high remaining power interval, a medium remaining power interval, and a low remaining power interval. For example, the remaining power of the power battery is divided into three remaining power intervals of 0-10%, 10-90%, and 90-100%, wherein the remaining power of 0-10% is a low remaining power interval, the remaining power of 10-90% is a medium remaining power interval, and the remaining power of 90-100% is a high remaining power interval, that is, each remaining power interval is mutually exclusive and exhaustive, that is, there is no overlap between each remaining power interval, and the remaining power (SOC) of the battery at any time will only fall within one interval, and will not belong to multiple intervals at the same time, and the set of all these intervals covers the entire possible power range, that is, 0-100%. Of course, in practice, the number of remaining power intervals may also be two, or more than three, and the remaining power range corresponding to each remaining power interval is not limited to the scope of the above embodiment, and the embodiment of the present application does not limit this.

[0036] In an optional embodiment, in the above step S102, when the remaining power is in a preset remaining power range, it is detected that the vehicle is in an ultra-high-speed driving state, including: when the remaining power is in a high remaining power range, detecting whether the average speed of the vehicle within a second preset time period is greater than a first speed threshold: if so, it is determined that the vehicle is in an ultra-high-speed driving state.

[0037] This embodiment uses a preset first vehicle speed threshold to determine whether the average vehicle speed of the vehicle during the second preset time period exceeds the first vehicle speed threshold, so as to determine whether the vehicle is in an ultra-high-speed driving state.

[0038] In an optional embodiment, in the above step S102, when the remaining power is in a preset remaining power range, it is detected that the vehicle is in an ultra-high-speed driving state, including: when the remaining power is in a medium remaining power range, it is detected whether the average speed of the vehicle within a second preset time period is greater than a first speed threshold: if so, it is determined that the vehicle is in an ultra-high-speed driving state.

[0039] In an optional embodiment, in the above step S102, when the remaining power is in a preset remaining power interval, it is detected that the vehicle is in an ultra-high-speed driving state, including: when the remaining power is in a low remaining power interval, the low remaining power interval is divided into multiple low remaining power sub-intervals, and the preset time for calculating the average vehicle speed in each low remaining power sub-interval is shortened in order from high to low. Based on the preset time, it is detected whether the average vehicle speed of the vehicle in the corresponding low remaining power sub-interval is greater than the second vehicle speed threshold: if so, it is determined that the vehicle is in an ultra-high-speed driving state.

[0040] Among them, the first preset time length and the second preset time length may be the same or different. When the first preset time length and the second preset time length are the same, it means that the preset time lengths for calculating the average vehicle speed in different remaining power intervals may be the same; when the first preset time length and the second preset time length are different, it means that the preset time lengths for calculating the average vehicle speed in different remaining power intervals are also different. In addition, in the high remaining power interval and the medium remaining power interval, the speed threshold compared with the average vehicle speed is the same, that is, both are the first speed threshold; however, in the low remaining power interval, the speed threshold compared with the average vehicle speed is different from the speed thresholds in the high remaining power interval and the medium remaining power interval, that is, the second speed threshold is different from the first speed threshold. Generally, the second speed threshold is smaller than the first speed threshold.

[0041] In addition, the low remaining power interval is further divided into multiple low remaining power sub-intervals to monitor the average speed of the vehicle in each low remaining power sub-interval in turn, and determine whether the vehicle is in an ultra-high speed driving state, so as to remind the vehicle of the ultra-high speed driving state in the low remaining power interval and adjust the power control strategy. Among them, this embodiment has no restrictions on the size and number of low remaining power sub-intervals.

[0042] In summary, this embodiment divides the vehicle into multiple remaining power intervals to hierarchically calculate the average speed of the vehicle, and sets a speed threshold in each remaining power interval, so as to timely detect whether the vehicle speed is in an ultra-high-speed driving state, providing prerequisites for subsequent power reminders and adjustment of power control strategies.

[0043] In an optional embodiment, when the remaining power is in the medium remaining power interval and it is determined that the vehicle is in an ultra-high-speed driving state, it also includes: determining whether the decrease in the remaining power of the vehicle within a second preset time period is greater than or equal to a preset amplitude threshold, and whether the average energy consumption is greater than or equal to a preset energy consumption threshold; if so, dividing the medium remaining power interval into multiple medium remaining power sub-intervals, and issuing corresponding user reminder information based on the different remaining power in the medium remaining power sub-intervals, wherein the user reminder information corresponding to the remaining power in different medium remaining power sub-intervals is different.

[0044] Specifically, the amplitude threshold used for comparison with the amplitude of the decrease in the remaining power can be a fixed threshold set based on experience or experiments, or a dynamic threshold adjusted according to the remaining power interval. For example, the higher the remaining power corresponding to the remaining power interval, the larger the corresponding amplitude threshold. On the contrary, the lower the remaining power corresponding to the remaining power interval, the smaller the corresponding amplitude threshold. Similarly, the energy consumption threshold can be a fixed energy consumption value set based on user experience or test data, or a dynamic energy consumption value determined based on the vehicle driving mode. For example, assuming that the second preset time is 5 minutes, within the second preset time, if the vehicle is in two-wheel drive mode, the energy consumption threshold is set to ≥26kwh / 100km, and if the vehicle is in four-wheel drive mode, the energy consumption threshold is set to 28kwh / 100km.

[0045] In addition, the number of medium remaining power sub-intervals may be two, three or more. For example, the medium remaining power interval is divided into three medium remaining power sub-intervals of 30%-90%, 15%-30%, and 10%-15%. When the remaining power is between 30% and 90%, a third user reminder message of "vehicle speed and energy consumption are too high, battery power drops too fast, and it is recommended that the vehicle speed be controlled within 140kph" is issued. If this condition is continuously met, the reminder is given once every 3 minutes. When the remaining power is between 15% and 30%, a fourth user reminder message of "vehicle speed and energy consumption are too high, battery power drops too fast, and power is low, it is recommended that the vehicle speed be controlled within 120kph" is issued. If this condition is continuously met, the reminder is given once every 1 minute; in addition, the vehicle's power control strategy may also be adjusted, including but not limited to limiting thermal management power, for example, limiting thermal management power to ≤3kw. When the remaining power is between 10% and 15%, a fifth user reminder message is issued, "The vehicle speed and energy consumption are too high, the battery power is low, and it is recommended to control the vehicle speed within 120kph"; similarly, the vehicle's power control strategy can also be adjusted, including but not limited to limiting the thermal management power, for example, limiting the thermal management power to ≤1kw.

[0046] Furthermore, in the medium remaining power interval, in addition to reminding the user in a step-by-step manner and adjusting the power control strategy for the heating management power according to a plurality of medium remaining power sub-intervals, other methods may be used to adjust the power control strategy.

[0047] In an optional embodiment, when the remaining power is within one of the medium remaining power sub-intervals, after issuing the corresponding user reminder information, it also includes: issuing a first voice request whether the energy recovery level needs to be enhanced; if a voice response agreeing to enhance the energy recovery level is received, setting the vehicle energy recovery level to a higher level; if a voice response disagreeing to enhance the energy recovery level is received, defaulting to the current vehicle energy recovery level unchanged; or / and, when the remaining power is within another medium remaining power sub-interval, after issuing the corresponding user reminder information, it also includes: issuing a second voice request whether to enter the super power saving mode; if a voice response agreeing to enter the super power saving mode is received, setting the vehicle to the super power saving mode.

[0048] This embodiment uses voice interaction to issue corresponding voice reminders to request the user to confirm the adjustment of the power consumption control strategy according to the ultra-high-speed driving state of the remaining power in different medium remaining power sub-intervals.

[0049] In an optional embodiment, when the remaining power is in a low remaining power interval and it is determined that the vehicle is in an ultra-high-speed driving state, it also includes: detecting the charging state of the vehicle; when it is detected that the vehicle is in a non-plugged charging state, according to the low remaining power sub-interval where the remaining power is located, issuing a corresponding user reminder message, and gradually limiting the available power of the cabin electrical equipment according to the low remaining power sub-interval, wherein the content of the user reminder message for the remaining power in different low remaining power sub-intervals is different.

[0050] The plug-in charging state, also known as the plug-in state, is a charging state of an electric vehicle. Generally, the charging state of an electric vehicle includes the plug-in charging state and the non-plug-in charging state. When the vehicle is in the plug-in charging state, it indicates that the vehicle's power battery is being charged, and when the vehicle is in the non-plug-in charging state, it indicates that the vehicle's power battery is not being charged. In this embodiment, when the remaining power is in the low remaining power interval and is not being charged, a plurality of low remaining power sub-intervals are used to issue different user reminder messages in a step-by-step manner so that the user can promptly understand the current vehicle remaining power situation.

[0051] Specifically, the low remaining power interval can be divided into three low remaining power sub-intervals of 5%-10%, 3%-5% and 3%-0%. When the remaining power is in each low remaining power sub-interval, a corresponding user reminder message is issued. For example, when the remaining power is in the low remaining power sub-interval of 5%-10%, if the average speed of the vehicle is greater than 130kph within 5 minutes and is in a non-plugged state, the vehicle controller continues to send a low battery signal, and the instrument controller receives the signal and continuously pops up a window to remind: the battery is low and the vehicle is about to stop working (equivalent to the sixth user reminder message); at the same time, the vehicle controller limits the maximum available power of the air conditioning controller AC (abbreviation for Air Conditioning) to 1kw, and the available power of the passenger compartment PTC (abbreviation for Positive Temperature Coefficient, translated as positive temperature coefficient electric heater) to 0kw. When the remaining power is in the low remaining power sub-interval of 3%-5%, if the average speed of the vehicle within 3 minutes is detected to be greater than 130kph and the vehicle is in a non-plugged state, the vehicle controller continues to send a very low battery signal, and the instrument controller receives the signal and continuously pops up a window prompt: the battery is low and the vehicle is about to stop working (equivalent to the seventh user reminder message); at the same time, the vehicle controller limits the maximum AC power available to the air-conditioning controller to 1kw and the PTC available power in the passenger compartment to 0kw. When the remaining power is in the low remaining power sub-interval of 3%-0%, if the average speed of the vehicle within 1 minute is detected to be greater than 130kph and the vehicle is in a non-plugged state, the vehicle controller continues to send a very low battery signal, and the instrument controller receives the signal and continuously pops up a window prompt: the battery is low and the vehicle is about to stop working (equivalent to the eighth user reminder message); at the same time, the vehicle controller limits the maximum AC power available to the air-conditioning controller to 1kw and the PTC available power in the passenger compartment to 0kw.

[0052] In an optional embodiment, after detecting the charging status of the vehicle, it also includes: when it is detected that the vehicle is in a plugged-in charging state, monitoring the change in the remaining power, and when the remaining power is in a low remaining power range, canceling the user reminder message; when the remaining power is in a medium remaining power range or above, lifting the available power limit on the cabin electrical equipment.

[0053] Therefore, the above-mentioned method embodiment provided in the present application requires taking measures to reduce energy consumption in situations of ultra-high-speed driving and high average energy consumption, reminding users and adjusting the power control strategy, delaying and maintaining the rate of power battery power decline, so as to improve user driving experience and satisfaction.

[0054] In a second embodiment of the present application, another method for managing power of an electric vehicle in an ultra-high-speed driving state is provided, comprising the steps of:

[0055] S201, obtaining the remaining power of the vehicle power battery;

[0056] S202, determining a target remaining power interval in which the current remaining power of the vehicle is located based on a plurality of pre-set remaining power intervals;

[0057] S203, based on the ultra-high speed driving state judgment condition pre-set for each remaining power interval, detecting whether the vehicle is in an ultra-high speed driving state in the target remaining power interval, wherein the ultra-high speed driving state judgment conditions for the multiple remaining power intervals are different;

[0058] S204: If yes, based on the battery reduction rate and / or average energy consumption of the vehicle during the ultra-high-speed driving state, a corresponding battery reminder is issued to the user and the power control strategy is adjusted.

[0059] Among them, in the above step S203, after detecting whether the vehicle is in an ultra-high-speed driving state within the target remaining power range, if not, that is, the vehicle is not in an ultra-high-speed driving state within the target remaining power range, then it returns to step S201 to form a closed loop, so that the electric vehicle is powered on and then the above method is executed in a loop.

[0060] The working principle of the above power management method is: the remaining power of the power battery is divided into multiple remaining power intervals. According to the different remaining power intervals in which the vehicle's current remaining power is located, the judgment conditions for whether the vehicle is in an ultra-high-speed driving state may be different, and corresponding power reminders and power control strategies are issued to the user for at least one of the corresponding power decline rate and average energy consumption of the vehicle in the ultra-high-speed driving state. These power reminders and power control strategies are different due to the different remaining power intervals in which the vehicle's current remaining power is located, so as to delay and maintain the power battery power decline rate.

[0061] It can be seen that according to the method provided in the first embodiment of the present application, by obtaining the remaining power of the vehicle's power battery, based on the pre-set multiple remaining power intervals, the target remaining power interval in which the vehicle's current remaining power is located is determined, and based on the super-high-speed driving state judgment conditions pre-set for each remaining power interval, it is detected whether the vehicle is in a super-high-speed driving state in the target remaining power interval, wherein the super-high-speed driving state judgment conditions for the multiple remaining power intervals are different. If so, based on the vehicle's power decline rate and / or average energy consumption during the super-high-speed driving state, a corresponding power reminder is issued to the user and the power control strategy is adjusted to delay and maintain the power battery power decline rate, thereby improving the user's driving experience and satisfaction.

[0062] In the above step S201, the remaining power is the SOC (State of Charge) of the power battery. In the field of electric vehicles, SOC is a commonly used term used to indicate the remaining power of the battery. The definition of SOC is the ratio of the current remaining power of the battery to the total power of the battery when it is fully charged, usually expressed as a percentage. For example, if the battery is fully charged at 100% and completely exhausted at 0%, then SOC represents the current percentage of the battery power.

[0063] In the above step S202, the remaining power interval refers to a series of ranges of the power battery at different charge states, which is a group of intervals. In other words, the remaining power interval refers to the representation of the remaining power within a certain range. Specifically, when the power battery is fully charged, the remaining power is 100%, and when the power is completely exhausted, the remaining power is 0%, so the remaining power of the power battery can be divided into several remaining power intervals.

[0064] For example, in an optional embodiment, the remaining power of the power battery is divided into three remaining power intervals of 0-10%, 10-90%, and 90-100%, wherein the remaining power of 0-10% is a low remaining power interval, the remaining power of 10-90% is a medium remaining power interval, and the remaining power of 90-100% is a high remaining power interval, that is, each remaining power interval is mutually exclusive and exhaustive, that is, there is no overlap between each remaining power interval, and the remaining power (SOC) of the battery at any time will only fall within one interval, and will not belong to multiple intervals at the same time, and the collection of all these intervals covers the entire possible power range, that is, 0-100%. Of course, in practice, the number of remaining power intervals can also be two, or more than three, and the remaining power range corresponding to each remaining power interval is not limited to the scope of the above embodiment, and the embodiment of the present application does not limit this.

[0065] In the above step S203, the judgment condition that the vehicle is in an ultra-high-speed driving state includes that the average speed of the vehicle within a preset period of time is greater than or equal to a preset speed threshold. In this embodiment, the preset time for calculating the average speed in different remaining power intervals may not be uniform, and the corresponding speed thresholds may also be different. Therefore, it is necessary to determine the judgment condition of the ultra-high-speed driving state based on the remaining power interval in which the remaining power is currently located, so as to determine whether the vehicle is in an ultra-high-speed driving state.

[0066] In an optional embodiment, in combination with the above-mentioned embodiment of dividing the remaining power interval into a high remaining power interval, a medium remaining power interval and a low remaining power interval, in step S203, based on the ultra-high speed driving state judgment condition pre-set for each remaining power interval, detecting whether the vehicle is in an ultra-high speed driving state in the target remaining power interval includes:

[0067] When the remaining power is in the high remaining power interval, detecting whether the average speed of the vehicle within a first preset time period is greater than a first speed threshold: if so, determining that the vehicle is in an ultra-high speed driving state;

[0068] When the remaining power is in the medium remaining power interval, detecting whether the average speed of the vehicle within the second preset time period is greater than the first speed threshold: if so, determining that the vehicle is in an ultra-high speed driving state;

[0069] When the remaining power is in the low remaining power interval, the low remaining power interval is divided into a plurality of low remaining power sub-intervals.

[0070] The preset time duration for calculating the average vehicle speed in each low remaining power sub-interval is shortened in order from high to low remaining power, and based on the preset time duration, it is detected whether the average vehicle speed in the corresponding low remaining power sub-interval is greater than the second vehicle speed threshold: if so, it is determined that the vehicle is in an ultra-high-speed driving state.

[0071] Among them, the first preset time length and the second preset time length may be the same or different. When the first preset time length and the second preset time length are the same, it means that the preset time lengths for calculating the average vehicle speed in different remaining power intervals may be the same; when the first preset time length and the second preset time length are different, it means that the preset time lengths for calculating the average vehicle speed in different remaining power intervals are also different. In addition, in the high remaining power interval and the medium remaining power interval, the speed threshold compared with the average vehicle speed is the same, that is, both are the first speed threshold; however, in the low remaining power interval, the speed threshold compared with the average vehicle speed is different from the speed thresholds in the high remaining power interval and the medium remaining power interval, that is, the second speed threshold is different from the first speed threshold. Generally, the second speed threshold is smaller than the first speed threshold.

[0072] In addition, the low remaining power interval is further divided into multiple low remaining power sub-intervals to monitor the average speed of the vehicle in each low remaining power sub-interval in turn, and determine whether the vehicle is in an ultra-high speed driving state, so as to remind the vehicle of the ultra-high speed driving state in the low remaining power interval and adjust the power control strategy. Among them, this embodiment has no restrictions on the size and number of low remaining power sub-intervals.

[0073] For example, when the remaining power of the vehicle is greater than 90%, that is, the remaining power is in the high remaining power range scenario, the average speed of the vehicle within 5 minutes is calculated, and then it is determined whether the calculated average speed is greater than 150kph. If so, it is determined that the vehicle is in an ultra-high speed driving state;

[0074] When 90% ≥ remaining power > 10%, that is, the remaining power is in the medium remaining power range, the average speed of the vehicle within 5 minutes is calculated, and then it is determined whether the calculated average speed is greater than 150 kph. If so, it is determined that the vehicle is in an ultra-high-speed driving state;

[0075] When 90% ≥ remaining power > 10%, that is, the remaining power is in the medium remaining power range, the average speed of the vehicle within 5 minutes is calculated, and then it is determined whether the calculated average speed is greater than 150 kph. If so, it is determined that the vehicle is in an ultra-high-speed driving state;

[0076] When 10% ≥ remaining power > 0%, that is, the remaining power is in the low remaining power interval scenario, the low remaining power interval can be divided into three low remaining power sub-intervals, including the first low remaining power sub-interval (5% < remaining power ≤ 10%), the second low remaining power sub-interval (3% < remaining power ≤ 5%) and the third low remaining power sub-interval (remaining power ≤ 3%). When the remaining power is in the first low remaining power sub-interval scenario, the average speed of the vehicle within the third preset time (assuming it is 5 minutes) is detected, and it is determined whether the average speed is greater than 130 kp h: If yes, the vehicle is determined to be in an ultra-high-speed driving state; in the scenario where the remaining power is in the second low remaining power sub-interval, the average speed of the vehicle within the fourth preset time (assuming 3 minutes) is detected, and it is determined whether the average speed is greater than 130 kph: if yes, the vehicle is determined to be in an ultra-high-speed driving state; in the scenario where the remaining power is in the third low remaining power sub-interval, the average speed of the vehicle within the fifth preset time (assuming 1 minute) is detected, and it is determined whether the average speed is greater than 130 kph: if yes, the vehicle is determined to be in an ultra-high-speed driving state. In the low remaining power interval, the average speed under different preset time lengths is calculated by dividing into multiple low remaining power sub-intervals. In general, the smaller the low remaining power sub-interval, the shorter the preset time length for calculating the average speed, and the speed threshold for judging the ultra-high-speed driving state is reduced, so as to timely judge whether the vehicle speed is in an ultra-high-speed driving state, and avoid the vehicle in the ultra-high-speed driving state. The remaining power drops too fast, the remaining power is quickly consumed, and the user is not reminded in time and the power control strategy is not adjusted, resulting in the vehicle stopping midway.

[0077] In summary, this embodiment divides the vehicle into multiple remaining power intervals to hierarchically calculate the average speed of the vehicle, and sets a speed threshold in each remaining power interval, so as to timely detect whether the vehicle speed is in an ultra-high-speed driving state, providing prerequisites for subsequent power reminders and adjustment of power control strategies.

[0078] In the above step S204, when the electric vehicle is driving at ultra-high speed, the average energy consumption is high and the battery power decreases quickly. Therefore, in the case of ultra-high speed driving and high average energy consumption, it is necessary to take measures to reduce energy consumption, remind the user and adjust the power control strategy. However, in different remaining power intervals, the reminders and power control strategy adjustments taken for ultra-high speed driving of the vehicle will be different.

[0079] In an optional embodiment, in combination with the above-mentioned embodiment of determining that the vehicle is in an ultra-high speed driving state in a high remaining power interval, a medium remaining power interval, and a low remaining power interval, when the remaining power is in the high remaining power interval, if it is determined that the vehicle is in an ultra-high speed driving state, in step S204, based on the power reduction speed and / or average energy consumption of the vehicle during the ultra-high speed driving state, a corresponding power reminder is issued to the user and the power control strategy is adjusted, including:

[0080] Determining whether the decrease in the remaining power of the vehicle within a first preset time period is greater than or equal to a preset amplitude threshold;

[0081] When the remaining power decreases by a magnitude greater than or equal to a preset magnitude threshold, detecting whether there are available charging piles within the navigation estimated mileage range of the vehicle's remaining power;

[0082] If a charging station is available, calculate whether the difference between the estimated driving range of the vehicle navigation and the driving range of the available charging station is greater than or equal to the preset driving range threshold according to the current position of the vehicle;

[0083] If not, a first user reminder message is sent, the first user reminder message including a confirmation request for whether to navigate to the nearest charging pile: when a confirmation request feedback for agreeing to navigate to the nearest charging pile is received, the nearest charging pile is navigated; when a confirmation request feedback for disagreeing to navigate to the nearest charging pile is received, the process returns to step S204 or S201;

[0084] If yes, return to step S204 or S201;

[0085] In the case where there is no available charging pile, a second user reminder message is sent, wherein the content of the second user reminder message includes that there is no available charging pile nearby and it is recommended to reduce the vehicle speed.

[0086] When the decrease in the remaining power is less than the preset threshold, the process returns to step S204 or S201.

[0087] Specifically, the amplitude threshold can be a fixed threshold set based on experience or experiments, or it can be a dynamic threshold adjusted according to the remaining power interval. For example, the higher the remaining power corresponding to the remaining power interval, the larger the corresponding amplitude threshold. Conversely, the lower the remaining power corresponding to the remaining power interval, the smaller the corresponding amplitude threshold.

[0088] The working principle of the technical solution provided by this embodiment is as follows: searching on a map or navigation system according to the remaining battery life, determining whether there are available charging piles within the remaining battery life. If there are available charging piles, it means that the vehicle has a place to recharge in time under the current cruising range, and the difference between the estimated drivable mileage based on the vehicle navigation and the mileage of the available charging piles navigated by the vehicle, if the difference is greater than or equal to the mileage threshold, the risk of recharging is low at this time, and there is no need to remind the user or adjust the power control strategy. If the difference is less than the mileage threshold, there is a risk that the vehicle will not be able to drive to the available charging piles in time for recharging, and thus a first user reminder message is sent to the user, requesting the user to confirm whether it is necessary to navigate to the nearest available charging pile for recharging. On the contrary, if there are no available charging piles, it means that the vehicle is at risk of being unable to recharge in time and breaking down, and at this time a reminder is given to the user through a second user reminder message.

[0089] Among them, the navigation estimated mileage of the vehicle's remaining power, that is, the cruising range of the remaining power, is not calculated in a unique way.

[0090] For example, first, get the average energy consumption of the last x trips:

[0091]

[0092] Secondly, the average energy consumption of the current mileage is obtained: V_avg1; it is understandable that the average energy consumption of each vehicle trip can be calculated by dividing the power consumption of each trip by the mileage. More specifically, the power consumption of each trip and the corresponding mileage can be obtained from the vehicle's battery management system and then calculated.

[0093] Furthermore, the average fuel consumption of navigation is calculated based on the average energy consumption of the last x trips and the average energy consumption of the current mileage: Wherein, k1 and k2 are weights of V_avg and V_avg1 respectively, and the weights may be fixed values, for example, k1=0.3 and k2=0.7.

[0094] Finally, the navigation estimated mileage with the remaining battery power is:

[0095] Of course, in practice, the remaining battery life calculated by the battery management system of the battery, that is, the life displayed on the vehicle instrument or screen, can also be used as the estimated drivable mileage for navigation. This embodiment of the present application does not limit this.

[0096] If there is an available charging station within the navigation estimated mileage of the remaining power, the mileage of the vehicle to the available charging station is the mileage estimated by the navigation software or navigation system, which can be directly read from the navigation software or navigation system. Specifically, the mileage difference between the navigation estimated mileage and the mileage of the vehicle to the available charging station is required to be greater than or equal to the preset mileage threshold, which means that the vehicle is required to have a certain amount of remaining power when it arrives at the available charging station to avoid unexpected factors causing the vehicle to be unable to reach the charging station.

[0097] Among them, the mileage threshold is a mileage value. In practice, a fixed mileage threshold can be set according to user experience or test data, or the mileage threshold can be dynamically adjusted according to environmental factors, including but not limited to: checking the ambient temperature outside the vehicle, adjusting the remaining power of the vehicle when it arrives at the available charging pile according to the ambient temperature outside the vehicle, and then calculating the mileage threshold based on the remaining power. For example, the ambient temperature outside the vehicle is obtained, and then it is determined whether the ambient temperature outside the vehicle is greater than the preset temperature threshold of -10°C (it can also be other temperature values). If so, it is required that the remaining power at the charging pile location is ≥3% (it can also be other values ​​in reality), and then the corresponding mileage value is calculated based on the navigation average fuel consumption calculated above, and it is used as the mileage threshold; if not, it is required that the remaining power at the charging pile location is ≥5% (it can also be other values ​​in reality). Similarly, the corresponding mileage value is calculated based on the navigation average fuel consumption calculated above, and it is used as the mileage threshold.

[0098] Assume that the estimated drivable mileage is M_re, the mileage to the charging station is M_re1, and the mileage threshold is M_re3, where: When M_re-M_re1<M_re3, the vehicle automatically pops up a window to the navigation page (and continues to calculate whether M_re-M_re1<M_re3 is true), navigates to the nearest available charging station, and issues a voice reminder: the current battery power is low, whether to navigate to the nearest charging station (i.e., the first user reminder information). Of course, the content of the first user reminder information is not limited to the example content, and the issuance method includes but is not limited to pop-up windows and voice, and can also be other methods, which are not limited in the embodiments of the present application.

[0099] If there is no available charging station within the estimated driving range of the remaining battery, a second user reminder message is sent, for example, a pop-up box prompts: vehicle speed, energy consumption is too high, battery power is decreasing too fast, there is no available charging station nearby, and it is recommended to control the vehicle speed within 100kph. If there is no available charging station during the continuous search, the second user reminder message can be sent every 5 minutes (or other time values).

[0100] According to the technical solution provided in this embodiment, by judging whether the decrease in the remaining power within the first preset time period exceeds the amplitude threshold, it is detected whether the remaining power of the vehicle decreases rapidly during ultra-high-speed driving, so as to promptly remind the user, and adopt a navigation charging strategy to ensure that the vehicle can have available charging piles to replenish power within the estimated mileage range, thereby preventing the vehicle from consuming power quickly due to ultra-high-speed driving and causing the vehicle to run out of power and stop midway, thereby reducing the risk of the vehicle stopping for power feeding midway.

[0101] In an optional embodiment, in combination with the above-mentioned embodiment of determining that the vehicle is in an ultra-high speed driving state in a high remaining power interval, a medium remaining power interval, and a low remaining power interval, when the remaining power is in the medium remaining power interval, if it is determined that the vehicle is in an ultra-high speed driving state, then for step S204, based on the power reduction speed and / or average energy consumption of the vehicle during the ultra-high speed driving state, a corresponding power reminder is issued to the user and the power control strategy is adjusted, including:

[0102] Determining whether the decrease in the remaining power of the vehicle within the second preset time period is greater than or equal to a preset amplitude threshold, and whether the average energy consumption is greater than or equal to a preset energy consumption threshold;

[0103] If so, the medium remaining power interval is divided into multiple medium remaining power sub-intervals, and corresponding user reminder information is issued according to the difference of remaining power in the medium remaining power sub-intervals, wherein the user reminder information corresponding to the remaining power in different medium remaining power sub-intervals is different.

[0104] Among them, after judging whether the decrease in the remaining power of the vehicle within the second preset time period is greater than or equal to the preset amplitude threshold, and whether the average energy consumption is greater than or equal to the preset energy consumption threshold, if not, return to step S201 or S204.

[0105] The average energy consumption may be the average energy consumption of the vehicle within the second preset time period, and its calculation method may refer to the average energy consumption calculation method for calculating the remaining power mileage in the above-mentioned high remaining power interval embodiment; or, it may be the displayed energy consumption calculated by the battery management system, that is, the energy consumption displayed on the vehicle instrument or screen, and the embodiment of the present application does not impose any restrictions on this.

[0106] Specifically, the amplitude threshold used for comparison with the amplitude of the decrease in the remaining power can be a fixed threshold set based on experience or experiments, or a dynamic threshold adjusted according to the remaining power interval. For example, the higher the remaining power corresponding to the remaining power interval, the larger the corresponding amplitude threshold. On the contrary, the lower the remaining power corresponding to the remaining power interval, the smaller the corresponding amplitude threshold. Similarly, the energy consumption threshold can be a fixed energy consumption value set based on user experience or test data, or a dynamic energy consumption value determined based on the vehicle driving mode. For example, assuming that the second preset time is 5 minutes, within the second preset time, if the vehicle is in two-wheel drive mode, the energy consumption threshold is set to ≥26kwh / 100km, and if the vehicle is in four-wheel drive mode, the energy consumption threshold is set to 28kwh / 100km.

[0107] In addition, the number of medium remaining power sub-intervals may be two, three or more. For example, the medium remaining power interval is divided into three medium remaining power sub-intervals of 30%-90%, 15%-30%, and 10%-15%. When the remaining power is between 30% and 90%, a third user reminder message of "vehicle speed and energy consumption are too high, battery power drops too fast, and it is recommended that the vehicle speed be controlled within 140kph" is issued. If this condition is continuously met, the reminder is given once every 3 minutes. When the remaining power is between 15% and 30%, a fourth user reminder message of "vehicle speed and energy consumption are too high, battery power drops too fast, and power is low, it is recommended that the vehicle speed be controlled within 120kph" is issued. If this condition is continuously met, the reminder is given once every 1 minute; in addition, the vehicle's power control strategy may also be adjusted, including but not limited to limiting thermal management power, for example, limiting thermal management power to ≤3kw. When the remaining power is between 10% and 15%, a fifth user reminder message is issued, "The vehicle speed and energy consumption are too high, the battery power is low, and it is recommended to control the vehicle speed within 120kph"; similarly, the vehicle's power control strategy can also be adjusted, including but not limited to limiting the thermal management power, for example, limiting the thermal management power to ≤1kw.

[0108] Furthermore, in the medium remaining power interval, in addition to reminding the user in a step-by-step manner and adjusting the power control strategy for the heating management power according to a plurality of medium remaining power sub-intervals, other methods may be used to adjust the power control strategy.

[0109] Following the above embodiment, in an optional embodiment, when the remaining power is in one of the medium remaining power sub-intervals, after issuing the corresponding user reminder information, it also includes: issuing a first voice request whether to enhance the energy recovery level; if a voice response agreeing to enhance the energy recovery level is received, the vehicle energy recovery level is set to a higher level; if a voice response disagreeing to enhance the energy recovery level is received, the current vehicle energy recovery level is defaulted to remain unchanged. Or / and, when the remaining power is in another medium remaining power sub-interval, after issuing the corresponding user reminder information, it also includes: issuing a second voice request whether to enter the super power saving mode; if a voice response agreeing to enter the super power saving mode is received, the vehicle is set to the super power saving mode.

[0110] This embodiment uses voice interaction to issue corresponding voice reminders to request the user to confirm the adjustment of the power control strategy according to the ultra-high-speed driving state of the remaining power in different medium remaining power sub-intervals. For example, when the remaining power is 30% ≥ SOC > 15%, a first voice reminder (only once per driving cycle) of "Do you agree to enhance the energy recovery level" is issued to the user. If the user answers: No, the current energy recovery level of the vehicle remains unchanged; if the user does not answer or answers: Yes, the energy recovery level is increased by one level. Among them, if the current energy recovery level of the vehicle is already the highest, the current highest energy recovery level can be maintained without adjustment. When the remaining power is 15% ≥ SOC > 10%, a second voice reminder (only once per driving cycle) of "Do you want to enter the super power saving mode when the current battery power is low?" is issued to the user. If the user answers: Yes, the vehicle is controlled to enter the super power saving mode, wherein the vehicle is in the super power saving mode, including but not limited to limiting the maximum speed ≤ 100kph, switching the energy recovery level to enhanced, turning off the front motor (when the vehicle is in four-wheel drive mode), and limiting the thermal management power ≤ 3kw. If the user answers: No, it remains unchanged. Optionally, if the user answers: No, it can also detect whether the vehicle's average speed is > 150kph and the SOC decreases ≥ 3% within the fourth preset time (assuming 2 minutes), and the average energy consumption is ≥ 26kwh / 100km (two-wheel drive), and the average energy consumption is ≥ 28kwh / 100km (four-wheel drive). If so, the vehicle's power control strategy is adjusted, including but not limited to limiting the thermal management power to < 1kw, disabling the passenger compartment PTC; and issuing a sixth user reminder message of "vehicle speed, energy consumption is too high, battery power is low, it is recommended to control the vehicle speed within 120kph". If not, return to step S201 or S204.

[0111] In an optional embodiment, in combination with the above-mentioned embodiment of determining that the vehicle is in an ultra-high speed driving state in a high remaining power interval, a medium remaining power interval, and a low remaining power interval, when the remaining power is in the low remaining power interval, if it is determined that the vehicle is in an ultra-high speed driving state, then for step S204, based on the power reduction speed and / or average energy consumption of the vehicle during the ultra-high speed driving state, a corresponding power reminder is issued to the user and the power control strategy is adjusted, including:

[0112] Detect the charging status of the vehicle;

[0113] When it is detected that the vehicle is in a non-plugged charging state, a corresponding user reminder message is issued according to the low remaining power sub-interval where the remaining power is located, and the available power of the cabin electrical equipment is gradually limited according to the low remaining power sub-interval. The content of the user reminder message is different for the remaining power in different low remaining power sub-intervals.

[0114] The plug-in charging state, also known as the plug-in state, is a charging state of an electric vehicle. Generally, the charging state of an electric vehicle includes the plug-in charging state and the non-plug-in charging state. When the vehicle is in the plug-in charging state, it indicates that the vehicle's power battery is being charged, and when the vehicle is in the non-plug-in charging state, it indicates that the vehicle's power battery is not being charged. In this embodiment, when the remaining power is in the low remaining power interval and is not being charged, a plurality of low remaining power sub-intervals are used to issue different user reminder messages in a step-by-step manner so that the user can promptly understand the current vehicle remaining power situation.

[0115] Specifically, the low remaining power interval can be divided into three low remaining power sub-intervals of 5%-10%, 3%-5% and 3%-0%. When the remaining power is in each low remaining power sub-interval, a corresponding user reminder message is issued. For example, when the remaining power is in the low remaining power sub-interval of 5%-10%, if the average speed of the vehicle is greater than 130kph within 5 minutes and is in a non-plugged state, the vehicle controller continues to send a low battery signal, and the instrument controller receives the signal and continuously pops up a window to remind: the battery is low and the vehicle is about to stop working (equivalent to the sixth user reminder message); at the same time, the vehicle controller limits the maximum available power of the air conditioning controller AC (abbreviation for Air Conditioning) to 1kw, and the available power of the passenger compartment PTC (abbreviation for Positive Temperature Coefficient, translated as positive temperature coefficient electric heater) to 0kw. When the remaining power is in the low remaining power sub-interval of 3%-5%, if the average speed of the vehicle within 3 minutes is detected to be greater than 130kph and the vehicle is in a non-plugged state, the vehicle controller continues to send a very low battery signal, and the instrument controller receives the signal and continuously pops up a window prompt: the battery is low and the vehicle is about to stop working (equivalent to the seventh user reminder message); at the same time, the vehicle controller limits the maximum AC power available to the air-conditioning controller to 1kw and the PTC available power in the passenger compartment to 0kw. When the remaining power is in the low remaining power sub-interval of 3%-0%, if the average speed of the vehicle within 1 minute is detected to be greater than 130kph and the vehicle is in a non-plugged state, the vehicle controller continues to send a very low battery signal, and the instrument controller receives the signal and continuously pops up a window prompt: the battery is low and the vehicle is about to stop working (equivalent to the eighth user reminder message); at the same time, the vehicle controller limits the maximum AC power available to the air-conditioning controller to 1kw and the PTC available power in the passenger compartment to 0kw.

[0116] Furthermore, in the above embodiment, after detecting the charging state of the vehicle, it also includes: when it is detected that the vehicle is in a plug-in charging state, monitoring the change of the remaining power, and when the remaining power is in a low remaining power range, canceling the user reminder message; when the remaining power is in a medium remaining power range or above, lifting the available power limit on the cabin electrical equipment. For example, when the remaining power is between 0% and 10%, if it is detected that the vehicle is in a plug-in charging state, the corresponding user reminder message and the available power limit of the air conditioning controller AC and the passenger compartment PTC will no longer be issued.

[0117] Therefore, the above-mentioned method embodiment provided in the present application requires taking measures to reduce energy consumption in situations of ultra-high-speed driving and high average energy consumption, reminding users and adjusting the power control strategy, delaying and maintaining the rate of power battery power decline, so as to improve user driving experience and satisfaction.

[0118] All the above optional technical solutions can be arbitrarily combined to form optional embodiments of the present application, which will not be described one by one here.

[0119] The following is an embodiment of the device of the present application, which can be used to execute the embodiment of the method of the present application. For details not disclosed in the embodiment of the device of the present application, please refer to the embodiment of the method of the present application.

[0120] See also Figure 2 In a third embodiment of the present application, a power management device for an electric vehicle in an ultra-high-speed driving state is provided, comprising:

[0121] The power acquisition module 201 is configured to acquire the remaining power of the vehicle power battery;

[0122] The state detection module 202 is configured to detect that the vehicle is in an ultra-high-speed driving state when the remaining power is within a preset remaining power interval;

[0123] The lower range judgment module 203 is configured to judge whether the range of the remaining power of the vehicle within the first preset time period is greater than or equal to a preset range threshold;

[0124] The charging pile query module 204 is configured to detect whether there is an available charging pile within the navigation estimated driving range of the vehicle's remaining power when the remaining power decreases by more than or equal to a preset threshold;

[0125] The first control module 205 is configured to calculate, based on the current position of the vehicle, whether the difference between the estimated drivable mileage of the vehicle navigation and the mileage of the vehicle navigation to the available charging pile is greater than or equal to a preset mileage threshold when there is an available charging pile; if not, send a first user reminder message, the first user reminder message including a confirmation request for navigating to the nearest charging pile; when receiving a confirmation request feedback for agreeing to navigate to the nearest charging pile, navigate to the nearest charging pile;

[0126] The second control module 206 is configured to send a second user reminder message when there is no available charging pile.

[0127] According to the technical solution provided in the embodiment of the present application, when the remaining power of the vehicle's power battery is within a preset remaining power range, it is detected whether the vehicle is in an ultra-high-speed driving state. If so, it is determined whether the decrease in the remaining power within a first preset time period exceeds a threshold value to detect whether the remaining power of the vehicle decreases rapidly during ultra-high-speed driving, thereby promptly reminding the user and adopting a navigation charging strategy to ensure that the vehicle can be recharged with available charging piles within the estimated mileage range, thereby preventing the vehicle from consuming power quickly due to ultra-high-speed driving and stopping due to exhaustion of power, thereby reducing the risk of the vehicle stopping for power feeding during the journey.

[0128] In some optional embodiments, the preset remaining power interval includes a high remaining power interval, and the above-mentioned state detection module 202 is configured to detect whether the average speed of the vehicle within a second preset time period is greater than a first speed threshold when the remaining power is in the high remaining power interval: if so, it is determined that the vehicle is in an ultra-high-speed driving state.

[0129] In some optional embodiments, the preset remaining power interval includes a medium remaining power interval, and the above-mentioned status detection module 202 is configured to detect whether the average speed of the vehicle within a second preset time period is greater than a first speed threshold when the remaining power is in the medium remaining power interval: if so, it is determined that the vehicle is in an ultra-high-speed driving state.

[0130] In some optional embodiments, the power management device for the electric vehicle in the ultra-high-speed driving state further includes:

[0131] The third control module 207 is configured to determine whether the decrease in the remaining power of the vehicle within a second preset time period is greater than or equal to a preset amplitude threshold, and whether the average energy consumption is greater than or equal to a preset energy consumption threshold; if so, the medium remaining power interval is divided into multiple medium remaining power sub-intervals, and corresponding user reminder information is issued according to the difference in the remaining power in the medium remaining power sub-interval, wherein the user reminder information corresponding to the remaining power in different medium remaining power sub-intervals is different.

[0132] In some optional embodiments, the third control module 207 is configured to, when the remaining power is in one of the medium remaining power sub-intervals, after issuing the corresponding user reminder information, also include: issuing a first voice request whether the energy recovery level needs to be enhanced; if a voice response agreeing to enhance the energy recovery level is received, setting the vehicle energy recovery level to a higher level; if a voice response disagreeing to enhance the energy recovery level is received, defaulting to the current vehicle energy recovery level unchanged; or / and, when the remaining power is in another medium remaining power sub-interval, after issuing the corresponding user reminder information, also include: issuing a second voice request whether to enter the super power saving mode; if a voice response agreeing to enter the super power saving mode is received, setting the vehicle to the super power saving mode.

[0133] In some optional embodiments, the preset remaining power interval includes a low remaining power interval, and the above-mentioned state detection module 202 is configured to divide the low remaining power interval into multiple low remaining power sub-intervals when the remaining power is in the low remaining power interval, and shorten the preset time for calculating the average vehicle speed in each low remaining power sub-interval in order from high to low power, and detect whether the average vehicle speed of the vehicle in the corresponding low remaining power sub-interval is greater than the second vehicle speed threshold based on the preset time: if so, it is determined that the vehicle is in an ultra-high-speed driving state.

[0134] In some optional embodiments, the power management device for the electric vehicle in the ultra-high-speed driving state further includes:

[0135] The fourth control module 208 is configured to detect the charging status of the vehicle; when it is detected that the vehicle is in a non-plugged charging state, a corresponding user reminder message is issued according to the low remaining power sub-interval where the remaining power is located, and the available power of the cabin electrical equipment is gradually limited according to the low remaining power sub-interval, wherein the content of the user reminder message for the remaining power in different low remaining power sub-intervals is different.

[0136] In some optional embodiments, the fourth control module 208 is configured to monitor changes in the remaining power after detecting the charging status of the vehicle, when it is detected that the vehicle is in a plugged-in charging state, and cancel the user reminder message when the remaining power is in a low remaining power range; when the remaining power is in a medium remaining power range or above, lift the available power limit on the cabin electrical equipment.

[0137] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0138] See Figure 3 In a fourth embodiment of the present application, an electric vehicle 3 is provided, including a controller 31 and a battery management system 32 , and the controller 31 is connected to the battery management system 32 .

[0139] The electric vehicle 3 may be a range-extended electric vehicle that contains a power battery and supports a pure electric driving mode, or may be a pure electric vehicle. In this embodiment, the electric vehicle 3 is preferably a pure electric vehicle.

[0140] The battery management system 32 is specifically used to monitor and manage the power battery to ensure its safe, reliable and efficient operation. The main functions of the battery management system 32 include but are not limited to battery monitoring, power management, thermal management and safety protection.

[0141] The controller 31 may be a dedicated controller for executing each step in the above method embodiment, or a controller in the electric vehicle 3. For example, the controller 31 may be a vehicle controller. Information exchange may be performed between the battery management system 32 and the vehicle controller. For example, the battery management system 32 monitors the battery status and transmits data such as voltage, current, temperature, SOC, SOH, etc. to the vehicle controller. The vehicle controller determines the remaining power interval corresponding to the current remaining power of the vehicle based on these data, and other operations. In addition, the vehicle controller may also send instructions to the battery management system to adjust the battery charge / discharge rate, enable or disable the battery cooling system, etc.

[0142] In some alternative embodiments, see Figure 4 The controller 31 includes: a processor 311, a memory 312, and a computer program 313 stored in the memory 312 and executable on the processor 311. When the processor 311 executes the computer program 313, the steps in the above-mentioned method embodiments are implemented. Alternatively, when the processor 311 executes the computer program 313, the functions of the modules in the above-mentioned device embodiments are implemented.

[0143] The controller 31 may include but is not limited to a processor 311 and a memory 312. Those skilled in the art will appreciate that Figure 4 The controller 31 is merely an example and does not limit the controller 31 , and may include more or less components than those shown in the figure, or different components.

[0144] The processor 311 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0145] The memory 312 may be an internal storage unit of the controller 31, for example, a hard disk or memory of the controller 31. The memory 312 may also be an external storage device of the controller 31, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the controller 31. The memory 312 may also include both an internal storage unit of the controller 31 and an external storage device. The memory 312 is used to store computer programs and other programs and data required by the electronic device.

[0146] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional modules in the embodiment can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units.

[0147] If the integrated module is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium (e.g., a computer-readable storage medium). Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. The computer program may include computer program code, which may be in source code form, object code form, executable file or some intermediate form. Computer-readable storage media may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0148] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for managing power of an electric vehicle in ultra-high-speed driving state, characterized in that: include: Obtain the remaining power of the vehicle's power battery; When the remaining power is within a preset remaining power interval, detecting that the vehicle is in an ultra-high-speed driving state; If so, determining whether the decrease in the remaining power of the vehicle within the first preset time period is greater than or equal to a preset amplitude threshold; When the remaining power decreases by a magnitude greater than or equal to a preset magnitude threshold, detecting whether there are available charging piles within the navigation estimated mileage range of the vehicle's remaining power; If there is an available charging pile, calculate whether the difference between the estimated mileage of the vehicle navigation and the mileage of the vehicle navigation to the available charging pile is greater than or equal to a preset mileage threshold according to the current position of the vehicle: if not, send a first user reminder message, the first user reminder message includes a confirmation request for navigating to the nearest charging pile; when receiving a confirmation request feedback for agreeing to navigate to the nearest charging pile, navigate to the nearest charging pile; In the case where there is no available charging station, a second user reminder message is sent.

2. The method according to claim 1, characterized in that The preset remaining power interval includes a high remaining power interval; When the remaining power is within a preset remaining power interval, detecting that the vehicle is in an ultra-high-speed driving state includes: When the remaining power is in the high remaining power interval, it is detected whether the average speed of the vehicle within a second preset time period is greater than a first speed threshold: if so, it is determined that the vehicle is in an ultra-high speed driving state.

3. The method according to claim 1, characterized in that The preset remaining power interval includes a medium remaining power interval; When the remaining power is within a preset remaining power interval, detecting that the vehicle is in an ultra-high-speed driving state includes: When the remaining power is in the medium remaining power interval, it is detected whether the average speed of the vehicle within the second preset time period is greater than the first speed threshold: if so, it is determined that the vehicle is in an ultra-high speed driving state.

4. The method according to claim 3, characterized in that Also includes: Determining whether the decrease in the remaining power of the vehicle within the second preset time period is greater than or equal to a preset amplitude threshold, and whether the average energy consumption is greater than or equal to a preset energy consumption threshold; If so, the medium remaining power interval is divided into multiple medium remaining power sub-intervals, and corresponding user reminder information is issued according to the difference of remaining power in the medium remaining power sub-intervals, wherein the user reminder information corresponding to the remaining power in different medium remaining power sub-intervals is different.

5. The method according to claim 4, characterized in that When the remaining power is within one of the medium remaining power sub-intervals, after the corresponding user reminder information is sent, the method further includes: sending a first voice request whether the energy recovery level needs to be enhanced; if a voice response agreeing to enhance the energy recovery level is received, the vehicle energy recovery level is set to a higher level; if a voice response disagreeing to enhance the energy recovery level is received, the current vehicle energy recovery level is assumed to remain unchanged; Or / and, when the remaining power is in another medium remaining power sub-interval, after sending the corresponding user reminder information, it also includes: sending a second voice request whether to enter the super power saving mode; if a voice response agreeing to enter the super power saving mode is received, setting the vehicle to the super power saving mode.

6. The method according to claim 1, characterized in that The preset remaining power interval includes a low remaining power interval; When the remaining power is within a preset remaining power interval, detecting that the vehicle is in an ultra-high-speed driving state includes: When the remaining power is in the low remaining power interval, the low remaining power interval is divided into multiple low remaining power sub-intervals, and the preset time for calculating the average vehicle speed in each low remaining power sub-interval is shortened in order from high to low. Based on the preset time, it is detected whether the average vehicle speed of the vehicle in the corresponding low remaining power sub-interval is greater than the second vehicle speed threshold: if so, it is determined that the vehicle is in an ultra-high-speed driving state.

7. The method according to claim 6, characterized in that Also includes: Detect the charging status of the vehicle; When it is detected that the vehicle is in a non-plugged charging state, a corresponding user reminder message is issued according to the low remaining power sub-interval where the remaining power is located, and the available power of the cabin electrical equipment is gradually limited according to the low remaining power sub-interval. The content of the user reminder message is different for the remaining power in different low remaining power sub-intervals.

8. The method according to claim 7, characterized in that After detecting the charging status of the vehicle, it also includes: when it is detected that the vehicle is in a plugged-in charging state, monitoring the change of the remaining power, and when the remaining power is in a low remaining power range, canceling the user reminder information; when the remaining power is in a medium remaining power range or above, lifting the available power limit on the cabin electrical equipment.

9. A power management device for an electric vehicle in an ultra-high-speed driving state, characterized in that: include: A power acquisition module is configured to acquire the remaining power of the vehicle power battery; a state detection module, configured to detect that the vehicle is in an ultra-high-speed driving state when the remaining power is within a preset remaining power interval; a lower range judgment module, configured to, if yes, judge whether the range of decrease of the remaining power of the vehicle within the first preset time period is greater than or equal to a preset range threshold; The charging pile query module is configured to detect whether there is an available charging pile within the navigation estimated driving mileage of the vehicle's remaining power when the remaining power decreases by more than or equal to a preset threshold; The first control module is configured to calculate, based on the current position of the vehicle, whether the difference between the estimated drivable mileage of the vehicle navigation and the mileage of the vehicle navigation to the available charging pile is greater than or equal to a preset mileage threshold when there is an available charging pile; if not, send a first user reminder message, the first user reminder message including a confirmation request for navigating to the nearest charging pile; and when receiving a confirmation request feedback for agreeing to navigate to the nearest charging pile, navigate to the nearest charging pile; The second control module is configured to send a second user reminder message when there is no available charging pile.

10. An electric vehicle, comprising a controller and a battery management system, wherein the controller is connected to the battery management system, and the controller comprises at least a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 8 are implemented.

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