Electric quantity control method and device for super-high-speed driving of extended-range vehicle and extended-range vehicle

Abstract

The application relates to the technical field of range-extending vehicles, and provides a power control method and device for super-high-speed driving of a range-extending vehicle and the range-extending vehicle.The method comprises the following steps: when the residual power of the vehicle is in a preset power interval, detecting whether the vehicle is in a super-high-speed driving state within a plurality of different preset time lengths; if the vehicle is in a first super-high-speed driving state within a first preset time length, and the range extender is in a normal starting state, judging whether the vehicle is in a second super-high-speed driving state within a second preset time length, and whether the average power generation power exceeds a calibration value; if yes, determining a vehicle speed and energy consumption influence quantity according to the average vehicle speed and the average energy consumption of the vehicle within the second preset time length, adding the vehicle speed and energy consumption influence quantity to the whole vehicle energy consumption demand, obtaining generator requested power generation power, and adjusting the range extender power generation power, so as to achieve the effect of delaying and maintaining the power battery power decline speed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of extended-range electric vehicles, and in particular to an electric quantity control method and device for extended-range electric vehicles in super-high-speed driving and an extended-range electric vehicle. BACKGROUND

[0002] The existing extended-range electric vehicles and pure electric vehicles usually send a prompt to the user when the power battery has a low electric quantity. However, the speed limit standards are different in different countries and regions around the world. When the user is driving at a super-high speed, the electric motor needs more electric energy to overcome the air resistance and other factors, and the vehicle needs to consume more energy to maintain a high speed. However, the working principle of the extended-range electric vehicle is to rely on the built-in generator to charge the battery and provide additional power. In the super-high-speed driving state of the vehicle, the power demand of the electric motor increases significantly, and the power generation of the generator cannot meet the entire power required for driving, thereby causing the electric quantity of the power battery to decrease rapidly, and even the electric quantity cannot be maintained. In the existing extended-range electric vehicle, there is a lack of effective reminders and control strategies for this situation, which may cause the user to face the risk of running out of electric quantity when driving at a high speed. SUMMARY

[0003] Therefore, the embodiments of the present application provide an electric quantity control method and device for extended-range electric vehicles in super-high-speed driving and an extended-range electric vehicle to solve the technical problem of a lack of effective reminders and electric control strategy adjustment for the electric quantity of the extended-range electric vehicle in the super-high-speed driving state.

[0004] In a first aspect, the embodiments of the present application provide an electric quantity control method for extended-range electric vehicles in super-high-speed driving, comprising: acquiring the residual electric quantity of the vehicle, and detecting whether the vehicle is in a super-high-speed driving state within a plurality of different preset time periods when the residual electric quantity is in a preset electric quantity interval; if the vehicle is in a first super-high-speed driving state within a first preset time period, detecting whether the range extender is in a normal starting state; if the range extender is in a normal starting state, determining whether the vehicle is in a second super-high-speed driving state within a second preset time period, the second preset time period being greater than the first preset time period; if the vehicle is in the second super-high-speed driving state within the second preset time period, detecting whether the average power generation of the vehicle within the second preset time period exceeds a calibration value; if it exceeds, determining a speed and energy consumption influence quantity according to the average speed and average energy consumption of the vehicle within the second preset time period, adding the speed and energy consumption influence quantity to the total vehicle energy consumption demand to obtain a generator requested power generation, and adjusting the power generation of the range extender based on the generator requested power generation.

[0005] In a second aspect, the application provides an electric quantity control device for super-high-speed driving of a range-extended vehicle, comprising: a first detection module configured to acquire a remaining electric quantity of the vehicle and detect whether the vehicle is in a super-high-speed driving state within a plurality of different preset time periods when the remaining electric quantity is in a preset electric quantity interval; a second detection module configured to detect whether the range extender is in a normal starting state if the vehicle is in a first super-high-speed driving state within a first preset time period; a third detection module configured to judge whether the vehicle is in a second super-high-speed driving state within a second preset time period if the range extender is in the normal starting state, the second preset time period being longer than the first preset time period; a fourth detection module configured to detect whether an average power generation of the vehicle within the second preset time period exceeds a calibration value if the vehicle is in the second super-high-speed driving state within the second preset time period; a power strategy module configured to determine a speed and energy consumption influence quantity according to an average speed and an average energy consumption of the vehicle within the second preset time period and add the speed and energy consumption influence quantity to a whole vehicle energy consumption demand to obtain a generator requested power generation if the calibration value is exceeded; and an electric quantity control module configured to adjust the power generation of the range extender based on the generator requested power generation.

[0006] In a third aspect, the application provides a range-extended vehicle comprising a controller and a battery management system, the whole vehicle controller being connected to the battery management system and comprising at least a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the above method when executing the computer program.

[0007] Compared with the prior art, the above electric quantity control method for super-high-speed driving of a range-extended vehicle acquires a remaining electric quantity of the vehicle and detects whether the vehicle is in a super-high-speed driving state within a plurality of different preset time periods when the remaining electric quantity is in a preset electric quantity interval; detects whether the range extender is in a normal starting state if the vehicle is in a first super-high-speed driving state within a first preset time period; judges whether the vehicle is in a second super-high-speed driving state within a second preset time period if the range extender is in the normal starting state, the second preset time period being longer than the first preset time period; detects whether an average power generation of the vehicle within the second preset time period exceeds a calibration value if the vehicle is in the second super-high-speed driving state within the second preset time period; determines a speed and energy consumption influence quantity according to an average speed and an average energy consumption of the vehicle within the second preset time period and adds the speed and energy consumption influence quantity to a whole vehicle energy consumption demand to obtain a generator requested power generation if the calibration value is exceeded; and adjusts the power generation of the range extender based on the generator requested power generation, so as to adjust the power generation of the range extender when the vehicle is in the preset electric quantity interval due to super-high-speed driving, thereby slowing down and maintaining the power battery electric quantity decline speed, improving user driving experience and satisfaction. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0009] Figure 1 is a flowchart of an electric quantity management and control method for super-high-speed driving of a range-extending vehicle provided by an embodiment of the present application;

[0010] Figure 2 is a functional relationship diagram between the average speed influence coefficient and the average speed of an embodiment of the present application;

[0011] Figure 3 is a functional relationship diagram between the average energy consumption influence coefficient and the average energy consumption provided by an embodiment of the present application;

[0012] Figure 4 is a structural schematic diagram of an electric quantity management and control device for super-high-speed driving of a range-extending vehicle provided by an embodiment of the present application;

[0013] Figure 5 is a partial structural schematic diagram of a range-extending vehicle provided by an embodiment of the present application;

[0014] Figure 6 is a structural schematic diagram of a controller provided by an embodiment of the present application. DETAILED DESCRIPTION

[0015] In the following description, specific details are set forth in order to provide a thorough understanding of the embodiments of the present application. However, persons skilled in the art will understand that the present application can be implemented in other embodiments without these specific details. In other cases, well-known systems, devices, circuits, and methods have not been described in detail in order not to obscure the description of the present application with unnecessary detail.

[0016] Please refer to Figure 1 In the first embodiment of the present application, an electric quantity management and control method for super-high-speed driving of a range-extending vehicle is provided, which includes the following steps:

[0017] S101, the residual electric quantity of the vehicle is acquired, and if the residual electric quantity is in a preset electric quantity interval, it is detected whether the vehicle is in a super-high-speed driving state in a plurality of different preset time periods;

[0018] S102, if the vehicle is in a first super-high-speed driving state in a first preset time period, it is detected whether the range extender is in a normal starting state;

[0019] S103, if the range extender is in a normal starting state, determining whether the vehicle is in a second super high-speed driving state within a second preset time period, the second preset time period being longer than the first preset time period;

[0020] S104, if the vehicle is in the second super high-speed driving state within the second preset time period, detecting whether the average power generation of the vehicle within the second preset time period exceeds a calibration value;

[0021] S105, if it exceeds, determining a speed and energy consumption influence quantity according to the average speed and average energy consumption of the vehicle within the second preset time period, and adding the speed and energy consumption influence quantity to the vehicle energy consumption demand to obtain a generator request power generation;

[0022] S106, adjusting the power generation of the range extender based on the generator request power generation.

[0023] The embodiments of the present application obtain the residual power of the vehicle, and in the case that the residual power is in a preset power interval, detect whether the vehicle is in a super high-speed driving state within a plurality of different preset time periods; if the vehicle is in a first super high-speed driving state within a first preset time period, detect whether the range extender is in a normal starting state; if the range extender is in a normal starting state, determine whether the vehicle is in a second super high-speed driving state within a second preset time period, the second preset time period being longer than the first preset time period; if the vehicle is in the second super high-speed driving state within the second preset time period, detect whether the average power generation of the vehicle within the second preset time period exceeds a calibration value; if it exceeds, determine a speed and energy consumption influence quantity according to the average speed and average energy consumption of the vehicle within the second preset time period, and add the speed and energy consumption influence quantity to the vehicle energy consumption demand to obtain a generator request power generation; adjust the power generation of the range extender based on the generator request power generation, so as to realize the range extender power generation adjustment in the case that the vehicle in the preset power interval causes the power to rapidly decrease due to super high-speed driving, thereby delaying and maintaining the power battery power decline speed, improving the user driving experience and satisfaction.

[0024] In some optional embodiments, determining the speed and energy consumption influence quantity according to the average speed and average energy consumption of the vehicle within the second preset time period, and adding the speed and energy consumption influence quantity to the vehicle energy consumption demand to obtain the generator request power generation comprises: determining a first product of the average speed and a preset average speed influence coefficient, and a second product of the average energy consumption and a preset average energy consumption influence coefficient based on the preset average speed influence coefficient and the preset average energy consumption influence coefficient; adding the first product and the second product to obtain the speed and energy consumption influence quantity; and adding the speed and energy consumption influence quantity to the driving request power and the accessory request power to obtain the generator request power generation.

[0025] Specifically, the vehicle whole vehicle control adjusts the power generation request power control strategy to the generator controller to increase the power generation request power of the generator in advance, assuming that P_r is the power generation request power of the generator, P_c is the driving request power, P_a is the accessory request power, V_avg is the average vehicle speed, k1 is the average vehicle speed influence coefficient, E_avg is the whole vehicle average energy consumption, and k2 is the average energy consumption influence coefficient, then the power generation power calculation formula of the range extender is: P_r=P_c+P_a+k1*V_avg+k2*E_avg. Wherein, referring to Figure 2 and Figure 3 The coefficient K1 is in a linear positive proportional function relationship with the average vehicle speed, and the coefficient K2 is in a linear positive proportional function relationship with the whole vehicle average energy consumption (also referred to as average energy consumption).

[0026] In an optional embodiment, the preset power interval includes a medium power interval; the residual power of the vehicle is monitored, and when the residual power of the vehicle is in the preset power interval, it is detected whether the vehicle has a preset super high-speed driving state, including: when the residual power is in the medium power interval, it is detected whether the average vehicle speed and the whole vehicle average energy consumption of the vehicle within a first preset time period exceed the respective corresponding calibration values; when the average vehicle speed and the whole vehicle average energy consumption within the first preset time period both exceed the respective corresponding calibration values, it is determined that the vehicle is in a first super high-speed driving state; when the average vehicle speed or the whole vehicle average energy consumption within the first preset time period does not exceed the respective corresponding calibration values, it is detected whether the average vehicle speed and the whole vehicle average energy consumption of the vehicle within a second preset time period exceed the respective corresponding calibration values, and the second preset time period is greater than the first preset time period; when the average vehicle speed and the whole vehicle average energy consumption within the second preset time period both exceed the respective corresponding calibration values, it is determined that the vehicle is in a second super high-speed driving state.

[0027] The specific power range corresponding to the medium power interval can be self-set according to actual application scenarios, and the embodiments of the present application do not limit this. Specifically, the vehicle has two super high-speed driving state judgments in the medium power interval, namely the first super high-speed driving state and the second super high-speed driving state. This embodiment is aimed at the case that the vehicle successively appears the first super high-speed driving state and the second super high-speed driving state in a continuous period, and respectively executes corresponding measures, including but not limited to adjusting the power generation power of the range extender according to a preset strategy to delay and maintain the power battery power decline speed, improve the user driving experience and satisfaction.

[0028] Then, in an optional embodiment, after detecting whether the range extender is currently in a normal startable state, the method further comprises: if the range extender is in a non-startable state, issuing power reminder information corresponding to the current sub-power interval of the remaining power according to the plurality of sub-power intervals divided according to the preset power interval; and if the range extender is in a normal startable state and the vehicle is in a second super-high-speed driving state, the method further comprises: issuing power reminder information corresponding to the second super-high-speed driving state.

[0029] On the basis of adjusting the power generation of the range extender, the corresponding power reminder information is issued to remind the user, so that the user can timely understand the current power change of the vehicle.

[0030] Further, in an optional embodiment, after issuing the power reminder information corresponding to the current sub-power interval of the remaining power, the method further comprises: issuing a voice prompt for whether to switch to a fuel mode and waiting for an answer; if the answer received from the user is no, the current vehicle mode is maintained; if the answer received from the user is yes or no answer is received, the vehicle mode is set to the fuel mode.

[0031] When the remaining power is in the medium power interval, the power is relatively sufficient, and the embodiment reminds the user through the voice interaction system and confirms whether the user has a demand for switching the vehicle mode, so as to delay and maintain the power battery power decline speed by switching the vehicle mode, thereby improving the user driving experience and satisfaction.

[0032] In an optional embodiment, the power interval further comprises a high power interval; when the remaining power of the vehicle is in the high power interval, no power reminder is performed and the current range extender power generation strategy is maintained. The high power interval can be a state in which the battery is close to full power, at which time the power is sufficient, and even if the vehicle is in a super-high-speed driving state, it can be temporarily not intervened, including but not limited to no power reminder and range extender power adjustment.

[0033] In an optional embodiment, the preset power interval comprises a low power interval; the remaining power of the vehicle is monitored, and when the remaining power of the vehicle is in the preset power interval, it is detected whether the vehicle is in a preset super-high-speed driving state, including: when the remaining power is in the low power interval, it is detected whether the average speed in the preset time interval corresponding to the current low power sub-interval of the remaining power exceeds a preset benchmark value according to a plurality of low power sub-intervals divided according to the low power interval; and when the average speed in the preset time interval corresponding to the current low power sub-interval of the remaining power exceeds the preset benchmark value, it is determined that the vehicle is in a third super-high-speed driving state.

[0034] The embodiment is aimed at the case that the vehicle exists super-high-speed driving in the low power interval, causing the power to rapidly decrease. The segmented reminders are given so that the user can accurately obtain the remaining power of the vehicle in the case of low battery power.

[0035] Next, in some optional embodiments, for the case that the vehicle battery power is in the low power interval, when the vehicle is in the third super-high-speed driving state, at least one of the following operations is performed according to the low power sub-interval corresponding to the current remaining power of the vehicle: issuing a power reminder information, limiting / disabling the available power of the thermal management system, and starting the range extender.

[0036] Unlike other preset power intervals, due to the battery power, in addition to issuing the corresponding power reminder information when the vehicle exists super-high-speed driving causing the battery power to rapidly decrease, the power consumption of the vehicle is also controlled to slow down and maintain the power battery power decline rate, improve the user driving experience and satisfaction.

[0037] The content of the operation performed by the vehicle in the low power interval when the third super-high-speed driving state occurs is not unique.

[0038] For example, in the above optional embodiment, whether the average vehicle speed in the preset time period corresponding to the current low power sub-interval of the remaining power exceeds the preset calibration value includes:

[0039] When the remaining power is in the first low power sub-interval, whether the average vehicle speed in the third preset time period exceeds the preset first calibration value is detected, and if it exceeds, it is determined that the vehicle is in the third super-high-speed driving state;

[0040] When the remaining power is in the second low power sub-interval, whether the average vehicle speed in the fourth preset time period exceeds the preset second calibration value is detected, and if it exceeds, it is determined that the vehicle is in the third super-high-speed driving state;

[0041] When the remaining power is in the third low power sub-interval, whether the average vehicle speed in the fifth preset time period exceeds the preset third calibration value is detected, and if it exceeds, it is determined that the vehicle is in the third super-high-speed driving state;

[0042] The first low power sub-interval, the second low power sub-interval, and the third low power sub-interval do not overlap, and the corresponding power ranges gradually decrease.

[0043] The operation corresponding to the low power sub-interval where the current remaining power of the vehicle is performed, including:

[0044] When the remaining power of the vehicle is in the first low power sub-interval and in the third super-high-speed driving state, a first power reminding information corresponding to the first low power sub-interval is sent out, and the range extender is started;

[0045] When the remaining power of the vehicle is in the second low power sub-interval and in the third super-high-speed driving state, a second power reminding information corresponding to the second low power sub-interval is sent out, and the available power of the air conditioner or / and the PTC is limited;

[0046] When the remaining power of the vehicle is in the third low power sub-interval and in the third super-high-speed driving state, a third power reminding information corresponding to the third low power sub-interval is sent out, and the air conditioner or / and the PTC is set to a disabled state.

[0047] It can be seen that, by dividing the low power interval into multiple low power sub-intervals, the embodiments of the application ladder the power reminding to the user and control the power consumption of the vehicle. Compared with the traditional simple power reminding, the embodiments of the application are more careful, can delay and maintain the power decline speed of the power battery, and improve the driving experience and satisfaction of the user.

[0048] In a second embodiment of the application, a power control method for super-high-speed driving of a range-extended vehicle is provided, including the steps of:

[0049] S201, determining a power interval in which a current remaining power of a power battery of a vehicle is located, the power interval including a medium power interval and a low power interval;

[0050] S202, determining a driving state of the vehicle in the corresponding power interval according to at least one index of an average vehicle speed and an average energy consumption of the vehicle in a preset time length, the driving state including a super-high-speed driving state;

[0051] S203, when the remaining power is in the medium power interval, if the vehicle is in the super-high-speed driving state, at least one operation of sending out a corresponding power reminding information and adjusting a power generation strategy of the range extender is performed according to a state of the range extender, the working state of the range extender including a state of being unable to start and a state of being able to start;

[0052] S204, when the remaining power is in the low power interval, if the vehicle is in the super-high-speed driving state, at least one operation of sending out a power reminding information corresponding to a low power sub-interval in which the remaining power is currently located, limiting an available power of a thermal management system, and starting the range extender is performed according to multiple low power sub-intervals divided by the low power interval.

[0053] The power control method for the extended-range vehicle in the super-high-speed driving state provided by the embodiments of the present application detects whether the vehicle is in the super-high-speed driving state by dividing the power range, and makes corresponding user reminders and adjusts the power generation of the range extender according to the super-high-speed driving state of the vehicle in different power ranges, so as to slow down and maintain the power battery power consumption rate, thereby improving the user driving experience and satisfaction.

[0054] In the step S201, the power range can be the entire power range of the power battery, i.e. the entire range from the maximum power of the power battery to the minimum power. For example, the medium power range corresponds to the battery power of 20%-100%, and the low power range corresponds to the battery power of 20%-0%. Alternatively, the power range can be a part of the power range of the power battery, i.e. one or more specific parts in the power range of the power battery. For example, the medium power range corresponds to the battery power of 10%-80%, and the low power range corresponds to the battery power of 10%-0%. In this case, there is no overlap between the medium power range and the low power range, i.e. any remaining power value of the power battery can only belong to one range.

[0055] In addition, the number of power ranges can be two, for example, the above-mentioned medium power range and low power range. The number of power ranges can also be more than two, for example, in addition to the above-mentioned medium power range and low power range, the power range also includes a high power range. The high power range, medium power range and low power range are preferably mutually exclusive and exhaustive, i.e. any power value at the same time can only belong to one range. The exhaustiveness of multiple power ranges means that the high power range, medium power range and low power range cover the entire power range from 0% to 100%, i.e. there is no power value outside the range. For example, the power range of the high power range is 80%-100%, the power range of the medium power range is 10%-80%, and the power range of the low power range is 0%-10%.

[0056] In an optional embodiment, the power range also includes a high power range. When the remaining power is in the high power range, if the vehicle is in the super-high-speed driving state, the current power generation strategy of the range extender is maintained, and no power reminder is given. Since the power is sufficient in the high power range, even if the vehicle is in the super-high-speed driving state, the battery power will still be sufficient and will not be depleted, so the power reminder or the adjustment of the power generation strategy of the range extender can be omitted.

[0057] In the step S202, the conditions for determining that the vehicle is in the super-high-speed driving state are different for different power ranges in which the remaining power is located.

[0058] In an optional embodiment, in step S202, the driving state of the vehicle in the corresponding power interval is determined according to at least one of the average vehicle speed and the average energy consumption of the vehicle in a preset time length, including:

[0059] When the remaining power is in the medium power interval, it is detected whether the average vehicle speed and the average energy consumption of the vehicle in the first preset time length exceed the respective corresponding calibration values;

[0060] When the average vehicle speed and the average energy consumption of the vehicle in the first preset time length both exceed the respective corresponding calibration values, it is determined that the vehicle is in the first super-high-speed driving state;

[0061] When the average vehicle speed or the average energy consumption of the vehicle in the first preset time length does not exceed the respective corresponding calibration values, it is detected whether the average vehicle speed and the average energy consumption of the vehicle in a second preset time length exceed the respective corresponding calibration values, the second preset time length being greater than the first preset time length;

[0062] When the average vehicle speed and the average energy consumption of the vehicle in the second preset time length both exceed the respective corresponding calibration values, it is determined that the vehicle is in the second super-high-speed driving state;

[0063] When the remaining power is in the low power interval, it is detected whether the average vehicle speed in the preset time length corresponding to the low power sub-interval in which the remaining power is currently located exceeds the preset calibration value according to the plurality of low power sub-intervals divided by the low power interval;

[0064] When the average vehicle speed in the preset time length corresponding to the low power sub-interval in which the remaining power is currently located exceeds the preset calibration value, it is determined that the vehicle is in the third super-high-speed driving state.

[0065] For the medium power interval, it is determined whether the vehicle is in the super-high-speed driving state by detecting whether the average vehicle speed and the average energy consumption of the vehicle in the first preset time length exceed the calibration values, and in the case that the vehicle is not detected to be in the super-high-speed driving state in the first preset time length, it is further determined whether the vehicle is in the super-high-speed driving state by detecting the average vehicle speed and the average energy consumption of the vehicle in the second preset time length. Thus, the case that the vehicle in the medium power interval is rapidly decreasing in power is detected, so that subsequent corresponding measures are taken to slow down and maintain the power battery power decline speed.

[0066] For example, when the remaining power is greater than 10% and less than or equal to 80%, it is determined that the vehicle is in a medium power interval, it is detected whether the vehicle satisfies the conditions that the average vehicle speed in 5 minutes is greater than 150 kph and the average energy consumption of the whole vehicle is greater than 28 kwh / 100 km; if the conditions are satisfied, it is judged that the vehicle is in a super-speed driving state, and if the conditions are not satisfied, it is further detected whether the vehicle satisfies the conditions that the average vehicle speed in 10 minutes is greater than 150 kph and the average energy consumption of the whole vehicle is greater than 28 kwh / 100 km, that is, the super-speed driving of the vehicle in a preset time period is further judged by increasing the time period. In the embodiment, the first preset time period is 5 minutes, the second preset time period is 10 minutes, and 150 kph and 28 kwh / 100 km are respectively the calibration values corresponding to the average vehicle speed and the average energy consumption of the whole vehicle. Of course, the first preset time period, the second preset time period, the calibration values of the average vehicle speed and the average energy consumption of the whole vehicle can be set according to the vehicle model and application requirements, and are not limited to the values in the above example, and the embodiment of the present application does not limit this.

[0067] For the low power interval, the low power interval is divided into a plurality of low power sub-intervals to gradually determine whether the vehicle is in a super-speed driving state, and the judgment condition is only the average vehicle speed in a preset time period. Since the vehicle has low fuel-saving power at this time, super-speed driving leads to rapid decline of power, thereby easily causing the risk of depletion of vehicle power, therefore, the low power sub-intervals are used to gradually divide the conditions to determine whether the vehicle speed exceeds the calibration value, so as to remind the user and adjust the corresponding power control strategy, thereby delaying and maintaining the power battery power decline speed, so that the vehicle reaches the power supplement position for power supplement before the power is depleted.

[0068] The number of low power sub-intervals can be determined according to actual application scenarios, the low power interval can be divided into two low power sub-intervals, for example, the low power interval is 0%-10%, which is divided into two low power sub-intervals of 5%-10% and 0%-5%. Alternatively, the low power interval can also be divided into three or more low power sub-intervals, for example, the first low power sub-interval is 5%-10%, the second low power sub-interval is 3%-5%, and the third low power sub-interval is 0%-3%. The vehicle remaining power is in different low power sub-intervals, and the conditions for detecting whether the vehicle is in a super-speed driving state also differ.

[0069] In an optional embodiment, immediately after the above embodiment, it is detected whether the average vehicle speed in a preset time period corresponding to the low power sub-interval in which the remaining power currently locates exceeds a preset calibration value, comprising:

[0070] When the remaining power is in the first low power sub-interval, it is detected whether the average vehicle speed of the vehicle in the third preset time period exceeds the preset first calibration value, and if so, it is determined that the vehicle is in a third super-speed driving state;

[0071] When the remaining electric quantity is in the second low electric quantity subinterval, it is detected whether the average vehicle speed of the vehicle in a fourth preset time length exceeds a preset second calibration value, and if so, it is determined that the vehicle is in the third super high speed driving state;

[0072] When the remaining electric quantity is in the third low electric quantity subinterval, it is detected whether the average vehicle speed of the vehicle in a fifth preset time length exceeds a preset third calibration value, and if so, it is determined that the vehicle is in the third super high speed driving state;

[0073] The first low electric quantity subinterval, the second low electric quantity subinterval and the third low electric quantity subinterval are mutually exclusive, and the corresponding electric quantity ranges gradually decrease.

[0074] Specifically, the third preset time length, the fourth preset time length and the fifth preset time length can be the same or different. If the same, the third preset time length, the fourth preset time length and the fifth preset time length are all less than or equal to the first preset time length and the second preset time length, so as to quickly detect the driving state of the vehicle in the low electric quantity interval. If different, the third preset time length, the fourth preset time length and the fifth preset time length decrease in turn, because the electric quantity of the low electric quantity subinterval corresponding to the third preset time length, the fourth preset time length and the fifth preset time length gradually decreases, and by decreasing the preset time length for calculating the average vehicle speed, it is beneficial to quickly detect the driving state of the vehicle, so as to determine whether it is in the super high speed driving state. Similarly, the calibration value compared with the average vehicle speed also decreases with the decrease of the electric quantity of the low electric quantity subinterval.

[0075] For example, when the vehicle remaining electric quantity is greater than 5% and less than or equal to 10%, it is in the first low electric quantity subinterval, at this time it is detected whether the average vehicle speed of the vehicle in 5 min is greater than 150 kph, and if so, it is determined that the vehicle is in the third super high speed driving state; when the vehicle remaining electric quantity is greater than 3% and less than or equal to 5%, it is in the second low electric quantity subinterval, at this time it is detected whether the average vehicle speed of the vehicle in 3 min is greater than 150 kph, and if so, it is determined that the vehicle is in the third super high speed driving state; when the vehicle remaining electric quantity is greater than 0% and less than or equal to 3%, it is in the second low electric quantity subinterval, at this time it is detected whether the average vehicle speed of the vehicle in 1 min is greater than 140 kph, and if so, it is determined that the vehicle is in the third super high speed driving state. It can be seen that the above 5 min, 3 min and 1 min are the third preset time length, the fourth preset time length and the fifth preset time length respectively, and 150 kph is the first calibration value and the second calibration value, and the third calibration value is 140 kph. Of course, the above third preset time length, fourth preset time length, fifth preset time length, first calibration value, second calibration value and third calibration value can also adopt other values, and the embodiments of the present application do not limit this.

[0076] In the case of determining that the vehicle is in the super high-speed driving state, the measures of reminding the user and adjusting the vehicle power control strategy will be different according to the different power intervals of the current remaining power of the vehicle, that is, the measures of delaying and maintaining the power battery power decline rate are different in different power intervals of the remaining power.

[0077] In an optional embodiment, in step S203, when the remaining power is in the medium power interval, if the vehicle is in the super high-speed driving state, at least one operation of issuing corresponding power reminding information and adjusting the power generation strategy of the range extender is performed according to the state of the range extender, including:

[0078] When the vehicle is in the first super high-speed driving state, the state of the range extender is obtained, and the state of the range extender includes unable to start and able to start normally;

[0079] If the range extender is in the unable to start state, according to the plurality of medium power subintervals divided by the medium power interval, the first power reminding information corresponding to the current medium power subinterval of the remaining power is issued;

[0080] If the range extender is in the able to start normally state and the vehicle is in the second super high-speed driving state, whether the average power generation power of the vehicle in the first preset time length exceeds the rated value is detected;

[0081] If it exceeds, the power generation power of the range extender is adjusted according to the following formula:

[0082] P_r=P_c+P_a+k1*V_avg+k2*E_avg;

[0083] Wherein, P_r represents the generator request power, P_c represents the driving request power, P_a represents the accessory request power, V_avg represents the average vehicle speed, k1 represents the average vehicle speed influence coefficient, E_avg represents the average energy consumption, and k2 represents the average energy consumption influence coefficient.

[0084] Specifically, the range extender is an auxiliary power device, which usually includes a small internal combustion engine and a generator, and is used to provide additional power when the battery power is insufficient, that is, when the battery power of the electric vehicle is low and cannot meet the demand of continuing driving, the range extender starts and runs, generates power through the generator, charges the battery or directly powers the motor, thereby prolonging the driving range of the vehicle. The range extender cannot start and can start normally are only two working states of the range extender, wherein, in practice, whether the range extender cannot start can be determined by reading the state value of the range extender, and the reason why the range extender cannot start is not concerned in this application.

[0085] When the range extender cannot be started, according to different subintervals of the remaining electric quantity, a first electric quantity reminding information corresponding to the current subinterval of the remaining electric quantity is sent. The number of the subintervals of the medium electric quantity is not unique.

[0086] Optionally, the number of the subintervals of the medium electric quantity is at least two. For example, in an optional embodiment, when it is determined that the vehicle is in the first super-high-speed driving state, assuming that the medium electric quantity interval is 10%-80%, it can be divided into three subintervals of the medium electric quantity: > 30%, ≤ 30% and ≤ 15%; when it is determined that the vehicle is in the second super-high-speed driving state, assuming that the medium electric quantity interval is 10%-80%, it can be divided into two subintervals of the medium electric quantity: ≥ 30% and ≤ 30%.

[0087] For example, the vehicle is in the first super-high-speed driving state, and the range extender cannot be started, at this time, the medium electric quantity interval is divided into three subintervals of the medium electric quantity: > 30%, ≤ 30% and ≤ 15%. If the remaining electric quantity is > 30%, the vehicle control unit sends a signal that the vehicle energy consumption is too high, and the instrument control unit receives the signal and prompts: in pure electric driving, the vehicle speed and energy consumption are too high, the battery electric quantity decreases too fast, and it is suggested that the vehicle speed be controlled within 140 kph. If the condition is continuously met, the prompt is given every 3 min. If the remaining electric quantity is ≤ 30%, a prompt is given: in pure electric driving, the battery electric quantity is low, the vehicle speed and energy consumption are too high, the range extender cannot be started, and it is suggested that the vehicle speed be controlled within 100 kph. If the condition is continuously met, the prompt is given every 1 min. If the remaining electric quantity is ≤ 15%, the instrument continuously prompts: the battery electric quantity is low, the vehicle speed is too high, the range extender cannot be started, and it is suggested that the vehicle speed be controlled within 100 kph, and it is requested to charge as soon as possible.

[0088] When the range extender can be normally started, it is detected whether the average power generation of the vehicle in a first preset time length exceeds a calibration value, if yes, it is indicated that the power generation request power is high at this time, so as to judge whether to adjust the power generation of the range extender. For example, it is detected whether the average power generation request power P_r of the vehicle in 5 min is greater than or equal to 50 kw.

[0089] Specifically, the vehicle control adjusts the power generation request power control strategy to the generator controller, so as to improve the power generation request power of the generator in advance, wherein the power generation formula of the range extender is: P_r = P_c + P_a + k1*V_avg + k2*E_avg, wherein P_r is the power generation request power of the generator, P_c is the driving request power, P_a is the accessory request power, V_avg is the average vehicle speed, k1 is the average vehicle speed influence coefficient, E_avg is the average energy consumption of the vehicle, and k2 is the average energy consumption influence coefficient. For example, see Figure 2 and Figure 3, the coefficient K1 is in a linear positive proportional function relationship with the average vehicle speed, and the coefficient K2 is in a linear positive proportional function relationship with the average energy consumption of the whole vehicle (also referred to as average energy consumption).

[0090] Further, in an optional embodiment, if the range extender is in a normal starting state and the vehicle is in the second super-high-speed driving state, it is detected whether the average power generation of the vehicle in the first preset time length exceeds the first calibration value, and further comprising: if it exceeds, according to the plurality of medium power sub-intervals divided in the medium power interval, a second power reminder information corresponding to the medium power sub-interval where the current residual power is located is sent out.

[0091] Specifically, while adjusting the power generation of the range extender, the corresponding second power reminder information is sent out to the user through the medium power sub-interval where the current residual power is located.

[0092] For example, the vehicle is in the second super-high-speed driving state, and the range extender can start normally. At this time, the medium power interval is divided into two medium power sub-intervals: ≥ 30% and ≤ 30%. If the residual power is > 30%, a pop-up box prompts: the vehicle speed and energy consumption are too high, the power generation cannot maintain the battery power, and it is recommended to control the vehicle speed within 140 kph (continue to meet the condition, prompt once every 10 minutes). If the residual power is ≤ 30%, a pop-up box prompts: the vehicle speed and energy consumption are too high, the power generation cannot maintain the battery power, and it is recommended to control the vehicle speed within 140 kph (continue to meet the condition, prompt once every 5 minutes).

[0093] Further, in an optional embodiment, after sending out the first power reminder information corresponding to the medium power sub-interval where the current residual power is located, further comprising:

[0094] sending out a voice prompt of whether to switch to the fuel mode and waiting for an answer;

[0095] if the answer received from the user is no, keeping the current vehicle mode unchanged;

[0096] if the answer received from the user is yes, or no answer is received, setting the vehicle mode to the fuel mode.

[0097] The embodiment realizes power reminder and voice interaction. When the battery power drops to the medium power sub-interval, the system actively communicates with the user and inquires whether to switch to the fuel mode. According to the feedback of the user, the system decides whether to switch the mode, thereby ensuring the cruising range and driving experience of the vehicle when the battery power is insufficient.

[0098] In the step S204, according to the plurality of low power sub-intervals divided in the low power interval, at least one of the following operations is performed: sending out a power reminder information corresponding to the low power sub-interval where the current residual power is located and limiting the available power of the thermal management system. The specific implementation is not unique.

[0099] In an optional embodiment, immediately after the above-mentioned embodiment of determining that the vehicle is in the super-high-speed driving state in the low-power range, in step S204, when the remaining power is in the low-power range, if the vehicle is in the super-high-speed driving state, at least one operation of issuing power reminding information corresponding to the current low-power sub-range of the remaining power and limiting the available power of the thermal management system is performed according to the multiple low-power sub-ranges divided in the low-power range, including:

[0100] When the vehicle remaining power is in the first low-power sub-range and in the third super-high-speed driving state, the third power reminding information is issued, and the range extender is started;

[0101] When the vehicle remaining power is in the second low-power sub-range and in the third super-high-speed driving state, the fourth power reminding information is issued, and the available power of the air conditioner or / and the PTC is limited;

[0102] When the vehicle remaining power is in the third low-power sub-range and in the third super-high-speed driving state, the fifth power reminding information is issued, and the air conditioner or / and the PTC is set to the disabled state.

[0103] Specifically, the PTC (the abbreviation of Positive Temperature Coefficient, which is translated as positive temperature coefficient resistor), the PTC and the air conditioner are two main power-consuming devices in the range extended vehicle, limiting the available power of the PTC and the air conditioner can reduce the consumption of the battery power by these devices, thereby playing a role in delaying and maintaining the power battery power decline speed.

[0104] The embodiment aims to ensure the vehicle's endurance and driving safety when the vehicle's remaining power is low and in the super-high-speed driving state by dividing multiple low-power sub-ranges and taking power management measures such as issuing power reminding information, starting the range extender, limiting or disabling the power of the thermal management system. This zoning management and strategy adjustment not only optimizes power use, but also maintains the normal operation of the vehicle at critical moments through various means.

[0105] All the above-mentioned optional technical solutions can be combined to form optional embodiments of the present application, which will not be repeated here.

[0106] The following is an apparatus embodiment of the present application, which can be used to execute the method embodiments of the present application. For details not disclosed in the apparatus embodiments of the present application, please refer to the method embodiments of the present application.

[0107] Referring to Figure 4 In the third embodiment of the present application, a power management device for super-high-speed driving of a range extended vehicle is provided, which comprises:

[0108] The first detection module 401 is configured to acquire the residual power of the vehicle, and detect whether the vehicle is in the super-high-speed driving state within a plurality of different preset time lengths when the residual power is in a preset power interval.

[0109] The second detection module 402 is configured to detect whether the range extender is in a normal starting state if the vehicle is in the first super-high-speed driving state within the first preset time length.

[0110] The third detection module 403 is configured to judge whether the vehicle is in the second super-high-speed driving state within a second preset time length if the range extender is in the normal starting state, the second preset time length being greater than the first preset time length.

[0111] The fourth detection module 404 is configured to detect whether the average power generation within the second preset time length exceeds a calibration value if the vehicle is in the second super-high-speed driving state within the second preset time length.

[0112] The power strategy module 405 is configured to determine a speed and energy consumption influence quantity according to the average speed and the average energy consumption within the second preset time length, and add the speed and energy consumption influence quantity to the whole vehicle energy consumption demand to obtain the generator request power generation if the calibration value is exceeded.

[0113] The power quantity control module 406 is configured to adjust the power generation of the range extender based on the generator request power generation.

[0114] The embodiments of the present application acquire the residual power of the vehicle, and detect whether the vehicle is in the super-high-speed driving state within a plurality of different preset time lengths when the residual power is in a preset power interval. If the vehicle is in the first super-high-speed driving state within the first preset time length, the range extender is detected to be in a normal starting state. If the range extender is in the normal starting state, it is judged whether the vehicle is in the second super-high-speed driving state within the second preset time length, the second preset time length being greater than the first preset time length. If the vehicle is in the second super-high-speed driving state within the second preset time length, it is detected whether the average power generation within the second preset time length exceeds a calibration value. If the calibration value is exceeded, a speed and energy consumption influence quantity is determined according to the average speed and the average energy consumption within the second preset time length, and the speed and energy consumption influence quantity is added to the whole vehicle energy consumption demand to obtain the generator request power generation. The power generation of the range extender is adjusted based on the generator request power generation, so as to realize the range extender power generation adjustment in the case that the vehicle in the preset power interval causes the power to rapidly decrease due to the super-high-speed driving, thereby delaying and maintaining the power battery power decrease speed, improving the user driving experience and satisfaction.

[0115] In some optional embodiments, the preset power interval includes a medium power interval.

[0116] The first detection module 401 is configured to detect whether the average vehicle speed and the average energy consumption of the vehicle in a first preset time period exceed the respective corresponding calibration values when the residual power is in the medium power interval; when the average vehicle speed and the average energy consumption of the vehicle in the first preset time period both exceed the respective corresponding calibration values, it is determined that the vehicle is in a first super-high-speed driving state; when the average vehicle speed or the average energy consumption of the vehicle in the first preset time period does not exceed the respective corresponding calibration values, it is detected whether the average vehicle speed and the average energy consumption of the vehicle in a second preset time period exceed the respective corresponding calibration values, the second preset time period being greater than the first preset time period; when the average vehicle speed and the average energy consumption of the vehicle in the second preset time period both exceed the respective corresponding calibration values, it is determined that the vehicle is in a second super-high-speed driving state.

[0117] In some optional embodiments, the power control device for super-high-speed driving of the range-extender vehicle described above further comprises:

[0118] The first reminding module 407 is configured to, after detecting whether the range extender is currently in a normal starting state, if the range extender is in a non-starting state, issue power reminding information corresponding to the current sub-power interval of the residual power according to the plurality of sub-power intervals divided according to the preset power interval; and when the range extender is in a normal starting state and the vehicle is in a second super-high-speed driving state, further comprising: issuing power reminding information corresponding to the second super-high-speed driving state.

[0119] In some optional embodiments, the power control device for super-high-speed driving of the range-extender vehicle described above further comprises:

[0120] The mode conversion module 408 is configured to, after issuing the power reminding information corresponding to the current sub-power interval of the residual power, issue a voice prompt of whether to switch to a fuel mode and wait for an answer; if the user's answer received is no, the current vehicle mode is maintained unchanged; if the user's answer received is yes, or no answer is received, the vehicle mode is set to the fuel mode.

[0121] In some optional embodiments, the power strategy module 405 is configured to determine a first product of the average vehicle speed and an average vehicle speed influence coefficient and a second product of the average energy consumption and an average energy consumption influence coefficient based on the preset average vehicle speed influence coefficient and the average energy consumption influence coefficient, wherein the average vehicle speed influence coefficient is in a linear positive proportional function relationship with the average vehicle speed, and the average energy consumption influence coefficient is in a linear positive proportional function relationship with the average energy consumption of the vehicle; the first product and the second product are added to obtain a vehicle speed and energy consumption influence quantity; the vehicle speed and energy consumption influence quantity, the driving request power and the accessory request power are added to obtain the generator request power generation power.

[0122] In some optional embodiments, the power interval further comprises a high power interval; the first reminding module 407 is configured to not perform the power reminding and maintain the current range extender power generation strategy when the remaining power of the vehicle is in the high power interval.

[0123] In some optional embodiments, the preset power interval comprises a low power interval;

[0124] The first detection module 401 is configured to, when the remaining power is in the low power interval, detect whether the average vehicle speed in a preset time period corresponding to the low power sub-interval in which the remaining power currently locates exceeds a preset benchmark value according to the low power sub-intervals divided by the low power interval: when the average vehicle speed in the preset time period corresponding to the low power sub-interval in which the remaining power currently locates exceeds the preset benchmark value, it is determined that the vehicle is in a third super high speed driving state.

[0125] In some optional embodiments, the power interval further comprises a high power interval; the power control device for the super high speed driving of the range extended vehicle further comprises:

[0126] The second reminding module 409 is configured to, when the vehicle is in the third super high speed driving state, perform an operation corresponding to the low power sub-interval in which the current remaining power of the vehicle locates according to the low power sub-intervals divided by the low power interval, the operation comprising at least one of issuing a power reminding information, limiting / disabling the available power of the thermal management system and starting the range extender.

[0127] In some optional embodiments, the first detection module 401 is configured to detect whether the average vehicle speed of the vehicle within a third preset time length exceeds a preset first benchmark value when the remaining power is in the first low power subinterval, and if so, determine that the vehicle is in a third super-speed driving state; detect whether the average vehicle speed of the vehicle within a fourth preset time length exceeds a preset second benchmark value when the remaining power is in the second low power subinterval, and if so, determine that the vehicle is in the third super-speed driving state; and detect whether the average vehicle speed of the vehicle within a fifth preset time length exceeds a preset third benchmark value when the remaining power is in the third low power subinterval, and if so, determine that the vehicle is in the third super-speed driving state; wherein the first low power subinterval, the second low power subinterval and the third low power subinterval do not overlap, and the corresponding power ranges gradually decrease; the first reminding module 407 is configured to, when the remaining power of the vehicle is in the first low power subinterval and the vehicle is in the third super-speed driving state, issue first power reminding information corresponding to the first low power subinterval and start the range extender; when the remaining power of the vehicle is in the second low power subinterval and the vehicle is in the third super-speed driving state, issue second power reminding information corresponding to the second low power subinterval and limit the available power of the air conditioner or / and the PTC; and when the remaining power of the vehicle is in the third low power subinterval and the vehicle is in the third super-speed driving state, issue third power reminding information corresponding to the third low power subinterval and set the air conditioner or / and the PTC to a disabled state.

[0128] See Figure 5 In the fourth embodiment of the present application, a range extended vehicle 5 is provided, which comprises a controller 51 and a battery management system 52, wherein the controller 51 is connected with the battery management system 52.

[0129] The range extended vehicle is a vehicle that combines pure electric and traditional fuel power, mainly driven by an electric motor, but when the battery power is insufficient, the range extender (usually an internal combustion engine) is started to charge the battery, thereby extending the cruising range. The main structures include but are not limited to: power battery, electric motor, range extender (internal combustion engine), vehicle controller (VCU, the abbreviation of Vehicle Control Unit) and battery management system (BMS). Optionally, the controller 51 can be a vehicle controller.

[0130] The battery management system 52 is specially used for monitoring and managing the power battery, ensuring its safe, reliable and efficient operation. The main functions of the battery management system include but are not limited to battery monitoring, power management, thermal management and safety protection.

[0131] Specifically, taking the controller as the vehicle controller as an example, the battery management system and the vehicle controller can interact with each other. For example, the battery management system monitors the battery state and transmits data such as voltage, current, temperature, SOC, SOH, etc. to the vehicle controller. The vehicle controller determines the target battery power interval corresponding to the current battery power of the vehicle and other operations according to the data. In addition, the vehicle controller can also send instructions to the battery management system to adjust the battery charging / discharging rate, enable or disable the battery cooling system, etc.

[0132] In some optional embodiments, referring to Figure 6 , the controller 51 includes a processor 511, a memory 512, and a computer program 513 stored in the memory 512 and executable on the processor 511. The processor 511 implements the steps in each of the above method embodiments when executing the computer program 513. Alternatively, the processor 511 implements the functions of each module in each of the above device embodiments when executing the computer program 513.

[0133] The controller can include but is not limited to the processor 511 and the memory 512. Those skilled in the art can understand that Figure 6 is only an example of the controller and does not constitute a limitation on the controller, and can include more or fewer components or different components than those shown.

[0134] The processor 511 can be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic components, discrete hardware components, etc.

[0135] The memory 512 can be an internal storage unit of the controller, such as a hard disk or memory of the controller. The memory 512 can also be an external storage device of the controller, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the controller. The memory 512 can also include both the internal storage unit and the external storage device of the controller. The memory 512 is used to store computer programs and other programs and data required by the electronic device.

[0136] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional modules is taken as an example, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of software functional unit.

[0137] The integrated module, if realized in the form of software functional unit and sold or used as an independent product, can be stored in a readable storage medium (for example, a computer readable storage medium). Based on such understanding, all or part of the processes in the above-mentioned embodiment methods can also be completed by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium. The computer program can be executed by a processor to realize the steps of each method embodiment. The computer program can include computer program code, which can be in the form of source code, object code, executable file or some intermediate form, etc. The computer readable storage medium can include any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier wave signal, telecommunication signal and software distribution medium, etc.

[0138] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A method for managing the battery power of a range-extended vehicle during ultra-high-speed driving, characterized in that, include: The remaining battery power of the vehicle is obtained, and if the remaining battery power is within a preset range, the vehicle is detected to be in an ultra-high speed driving state within a preset range of multiple different preset time periods. If the vehicle is in the first ultra-high speed driving state within the first preset time period, check whether the range extender is currently in a normal start state; If the range extender is in a normal start-up state, determine whether the vehicle is in a second ultra-high speed driving state within a second preset time period, where the second preset time period is longer than the first preset time period; If the vehicle is in the second ultra-high speed driving state within the second preset time period, detect whether the average power generation of the vehicle within the second preset time period exceeds the calibration value. If the speed exceeds the limit, the speed energy consumption impact is determined based on the vehicle's average speed and average energy consumption within the second preset time period. The speed energy consumption impact is then added to the overall vehicle energy consumption demand to obtain the generator's requested power output. Adjust the range extender's power output based on the generator's requested power output; The preset power range includes a medium power range; The step of detecting whether the vehicle is in an ultra-high-speed driving state within a preset range when the remaining battery power is within a preset range includes: When the remaining battery power is in the medium battery range, detect whether the vehicle's average speed and average energy consumption over a first preset time period exceed their respective calibration values. When the average vehicle speed and the average energy consumption of the whole vehicle both exceed their respective calibration values ​​within the first preset time period, the vehicle is determined to be in the first ultra-high speed driving state. When the average vehicle speed or average vehicle energy consumption within the first preset time period does not exceed its corresponding calibration value, the system detects whether the average vehicle speed and average vehicle energy consumption within the second preset time period exceed their respective calibration values, wherein the second preset time period is longer than the first preset time period; when both the average vehicle speed and average vehicle energy consumption within the second preset time period exceed their respective calibration values, the system determines that the vehicle is in a second ultra-high speed driving state.

2. The method according to claim 1, characterized in that, After determining whether the range extender is currently in a normal startup state, the process also includes: If the range extender is unable to start, it will issue a power reminder message corresponding to the current sub-power range of the remaining power, based on multiple sub-power ranges divided by the preset power range. In addition, when the range extender is in a normal start-up state and the vehicle is in a second ultra-high speed driving state, it also includes: issuing a battery level reminder message corresponding to the second ultra-high speed driving state.

3. The method according to claim 2, characterized in that, After issuing a battery level alert message corresponding to the current sub-range of remaining battery power, it also includes: It will issue a voice prompt asking whether to switch to fuel mode and wait for a response; If the user answers no, maintain the current vehicle mode. If a yes response is received from the user, or if no response is received from the user, the vehicle mode is set to fuel mode.

4. The method according to claim 1, characterized in that, The step of determining the vehicle speed energy consumption impact based on the vehicle's average speed and average energy consumption over a second preset time period, and adding the vehicle speed energy consumption impact to the overall vehicle energy consumption demand to obtain the generator's requested power output, includes: Based on the preset average vehicle speed influence coefficient and average energy consumption influence coefficient, the first product of average vehicle speed and average vehicle speed influence coefficient and the second product of average energy consumption and average energy consumption influence coefficient are determined. The average vehicle speed influence coefficient is linearly proportional to the average vehicle speed, and the average energy consumption influence coefficient is linearly proportional to the average energy consumption of the whole vehicle. Add the first product to the second product to obtain the energy consumption impact of vehicle speed; The vehicle speed energy consumption impact is added to the drive power request and accessory power request to obtain the generator power request.

5. The method according to any one of claims 1-4, characterized in that, The preset power range includes a low power range; The step of detecting whether the vehicle is in an ultra-high-speed driving state within a preset range when the remaining battery power is within a preset range includes: When the remaining battery power is in the low battery range, the vehicle is divided into multiple low battery sub-ranges. The average vehicle speed within a preset time period corresponding to the current low battery sub-range is checked to see if it exceeds a preset calibration value. If the average vehicle speed within a preset time period corresponding to the current low battery sub-range exceeds the preset calibration value, the vehicle is determined to be in the third ultra-high speed driving state.

6. The method according to claim 5, characterized in that, Also includes: When the vehicle is in the third ultra-high speed driving state, it performs an operation corresponding to the low battery sub-range where the vehicle's current remaining battery power is located, based on multiple low battery sub-ranges divided into low battery ranges. The operation includes issuing a battery power reminder message, limiting / disabling the available power of the thermal management system, and starting the range extender, at least one of these.

7. The method according to claim 6, characterized in that, Detect whether the average vehicle speed within a preset time period corresponding to the current low battery sub-range exceeds a preset calibration value, including: When the remaining battery power is in the first low battery range, the vehicle's average speed within the third preset time period is checked to see if it exceeds the preset first calibration value. If it does, the vehicle is determined to be in the third ultra-high speed driving state. When the remaining battery power is in the second low battery range, the vehicle's average speed within the fourth preset time period is checked to see if it exceeds the preset second calibration value. If it does, the vehicle is determined to be in the third ultra-high speed driving state. When the remaining battery power is in the third low battery range, the average vehicle speed within the fifth preset time period is checked to see if it exceeds the preset third calibration value. If it does, the vehicle is determined to be in the third ultra-high speed driving state. Among them, the first low-energy sub-range, the second low-energy sub-range, and the third low-energy sub-range do not overlap, and the corresponding energy range gradually decreases. The operation corresponding to the low battery sub-range where the vehicle's current remaining battery power is located includes: When the vehicle's remaining battery power is in the first low battery sub-range and it is in the third ultra-high speed driving state, a first battery power reminder message corresponding to the first low battery sub-range is issued, and the range extender is activated; When the vehicle's remaining battery power is in the second low battery sub-range and it is in the third ultra-high speed driving state, a second battery power reminder message corresponding to the second low battery sub-range will be issued, and the available power of the air conditioner and / or PTC will be limited. When the vehicle's remaining battery power is in the third low battery sub-range and it is in the third ultra-high speed driving state, a third battery power reminder message corresponding to the third low battery sub-range will be issued, and the air conditioning and / or PTC will be set to the disabled state.

8. A power management device for ultra-high-speed driving of a range-extended vehicle, characterized in that, include: The first detection module is configured to acquire the remaining battery power of the vehicle, and, if the remaining battery power is within a preset battery power range, detect whether the vehicle is in an ultra-high speed driving state within a preset number of different preset time periods. The second detection module is configured to detect whether the range extender is currently in a normal start-up state if the vehicle is in a first ultra-high speed driving state within a first preset time period. The third detection module is configured to determine whether the vehicle is in a second ultra-high speed driving state within a second preset time period if the range extender is in a normal start-up state, wherein the second preset time period is longer than the first preset time period. The fourth detection module is configured to detect whether the average power generation of the vehicle exceeds the calibration value if the vehicle is in the second ultra-high speed driving state within the second preset time period. The power strategy module is configured to, if the limit is exceeded, determine the impact of vehicle speed energy consumption based on the vehicle's average speed and average energy consumption within a second preset time period, and add the impact of vehicle speed energy consumption to the overall vehicle energy consumption demand to obtain the generator's requested power generation. The power management module is configured to adjust the power output of the range extender based on the power output requested by the generator; The preset battery range includes a medium battery range; the step of detecting whether the vehicle is in an ultra-high-speed driving state within multiple preset time periods when the remaining battery is within the preset battery range includes: When the remaining battery power is in the medium battery range, detect whether the vehicle's average speed and average energy consumption over a first preset time period exceed their respective calibration values. When the average vehicle speed and the average energy consumption of the whole vehicle both exceed their respective calibration values ​​within the first preset time period, the vehicle is determined to be in the first ultra-high speed driving state. When the average vehicle speed or average vehicle energy consumption within the first preset time period does not exceed its corresponding calibration value, the system detects whether the average vehicle speed and average vehicle energy consumption within the second preset time period exceed their respective calibration values, wherein the second preset time period is longer than the first preset time period; when both the average vehicle speed and average vehicle energy consumption within the second preset time period exceed their respective calibration values, the system determines that the vehicle is in a second ultra-high speed driving state.

9. A range-extended vehicle, characterized in that, The method includes a controller and a battery management system, the controller being connected to the battery management system, and at least includes a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, implements the steps of the method as described in any one of claims 1 to 7.

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