Extended-range vehicle endurance control method and device

Abstract

The invention provides an extended-range vehicle endurance control method and device, and relates to the technical field of extended-range vehicles. The method comprises the following steps: acquiring target information of a target vehicle under the condition that navigation of the target vehicle is started; the target information comprises navigation information and battery information; based on the target information, determining whether the target vehicle needs to supplement electric energy or not; if the target vehicle needs to be supplemented with electric energy, determining a starting condition and power generation power of a range extender of the target vehicle based on the target information; and if the target vehicle meets the starting condition, the range extender is controlled to generate electricity with the generated power to supplement the electric energy of the target vehicle, so that the power generation efficiency of the range extender is improved. According to the extended-range vehicle endurance control method and device provided by the invention, the endurance capability of the vehicle can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of extended-range vehicles, and in particular to a range control method and device for an extended-range vehicle. Background Art

[0002] Range-extended vehicles operate in hybrid mode, and the allocation strategy for these two energy sources significantly impacts the vehicle's overall range. From an economic perspective, electricity consumption is the most economical (lower electricity prices), so a strategy prioritizing electricity should be adopted. While prioritizing electricity, for scenarios where fuel is essential, such as long-distance driving (where pure electric range is insufficient) or in areas with inconvenient charging, improving the vehicle's fuel-to-electricity conversion efficiency is a key path to improving overall range.

[0003] After the range extender option is determined, the vehicle's fuel-electricity conversion efficiency mainly depends on the selection of the range extender operating point. Figure 1 This is a diagram of the universal characteristic curve of the engine provided by the background technology of this application. Figure 1 As shown, for range extenders, the highest efficiency in oil-to-electricity conversion occurs in the medium-to-high speed, medium-to-high torque range. For the same power output, different efficiency operating points (speed-torque) are selected. Low efficiency operating points mean energy loss. However, high efficiency operating points also come with the drawbacks of high speeds and poor noise, vibration, and harshness (NVH). Especially at low speeds, efficiency must be sacrificed to meet NVH requirements. Furthermore, the charging power at high efficiency operating points is relatively high, far exceeding the vehicle's driving requirements at low speeds. Therefore, for range extenders, a common strategy is to combine low-speed, low-power generation (low speed, low speed, low torque, low efficiency) with high-speed, high-power generation (high speed, high speed, high torque, high efficiency). This balances NVH at low speeds with power requirements at varying speeds. However, in this scenario, it's difficult to consistently maintain high efficiency for the range extender, impacting the vehicle's range. Summary of the Invention

[0004] The present application provides a range-extended vehicle endurance control method and device to address the defect in the prior art that it is difficult to effectively improve the vehicle endurance, thereby improving the vehicle endurance.

[0005] In a first aspect, the present application provides a range control method for an extended-range vehicle, comprising:

[0006] When the target vehicle starts navigation, obtaining target information of the target vehicle; the target information includes navigation information and battery information;

[0007] Based on the target information, determining whether the target vehicle needs to be supplemented with electric energy;

[0008] If the target vehicle needs to supplement electric energy, determining the start-up conditions and power generation capacity of the range extender of the target vehicle based on the target information;

[0009] If the target vehicle meets the start-up condition, the range extender is controlled to generate electricity with the generated power to supplement the electric energy of the target vehicle, so as to improve the power generation efficiency of the range extender.

[0010] Optionally, the navigation information includes at least one of the current vehicle speed, the current average vehicle speed, the target mileage of the entire navigation journey, the first estimated travel time of the entire navigation journey, the current traffic congestion level, the congested road section information, and the target distance between the target vehicle and the congested road section; the battery information includes at least one of the current power level and the current balance point power level; the congested road section information includes at least one of the target length of the congested road section and the second estimated travel time of the congested road section.

[0011] Optionally, within a first time period after the start-up moment of the target vehicle, determining whether the target vehicle needs to supplement electric energy based on the target information includes:

[0012] Determining an estimated average speed of the target vehicle based on the target mileage and the first estimated travel time;

[0013] determining a first electric energy required for the target vehicle to travel the target mileage based on the estimated average vehicle speed;

[0014] Determining a second electric energy that can be consumed by the target vehicle from the current electric energy to the current balance point electric energy;

[0015] If the first electric energy is greater than the second electric energy, determining that the target vehicle is in a first energy replenishment situation in which electric energy needs to be replenished, and using the difference between the first electric energy and the second electric energy as a first electric energy to be replenished for the target vehicle;

[0016] The starting time is the time when the target vehicle starts to travel the entire navigation journey.

[0017] Optionally, within a second time period from the start time to the stop time of the target vehicle, determining whether the target vehicle needs to supplement electric energy based on the target information includes:

[0018] If it is determined based on the target information that there is a congested road section ahead of the target vehicle, and the predicted power of the target vehicle when arriving at the entrance of the congested road section is less than or equal to the current balance point power, it is determined that the target vehicle is in a second energy replenishment situation in which electric energy needs to be replenished, and a second amount of electric energy to be replenished of the target vehicle is determined based on the target length and the second estimated travel time;

[0019] The start time is the time when the target vehicle starts to travel the entire navigation journey, and the stop time is the time when the target vehicle completes the entire navigation journey.

[0020] Optionally, determining a start condition of a range extender of the target vehicle based on the target information includes:

[0021] Normalizing the current traffic congestion level, the second estimated travel time, the target distance, the current vehicle speed, the current battery level, and the current equilibrium point battery level to obtain a normalized parameter;

[0022] The normalized parameters are input into a target model, and the start-up conditions are output through the target model; the start-up conditions include a vehicle speed start-up condition and a power start-up condition.

[0023] Optionally, when the target vehicle is in the first energy replenishment state, determining the power generation power of the range extender of the target vehicle based on the target information includes:

[0024] searching a target power corresponding to the current vehicle speed from a preset power table; the preset power table is a table of correspondence between the current vehicle speed and the generated power;

[0025] The target power is used as the generated power.

[0026] Optionally, when the target vehicle is in the second energy replenishment condition, determining the power generation power of the range extender of the target vehicle based on the target information includes:

[0027] determining a target duration based on the current average vehicle speed and the target distance;

[0028] determining an initial power based on the second electric energy to be replenished and the target duration;

[0029] The initial power is corrected by a correction coefficient to obtain the generated power.

[0030] Optionally, when the target vehicle is in the second energy replenishment condition, the method further includes:

[0031] If the target vehicle meets the starting condition, based on the second electric energy to be replenished, the value of the current balance point electric energy is increased;

[0032] If the target vehicle does not meet the starting condition, and the starting condition is not met before the target vehicle reaches the congested road section, the value of the current balance point power is lowered based on the second electric energy to be replenished.

[0033] Optionally, the range control method for an extended-range vehicle further includes:

[0034] When the target vehicle does not have navigation turned on, obtaining the current speed, current power level and current balance point power level of the target vehicle;

[0035] If the current power level is lower than the current balance point power level, the current power level is higher than a preset power level threshold, and the current vehicle speed is lower than a preset vehicle speed threshold, the range extender is controlled to shut down.

[0036] In a second aspect, the present application further provides a range-extended vehicle endurance control device, comprising:

[0037] An acquisition module is used to obtain target information of the target vehicle when the target vehicle starts navigation; the target information includes navigation information and battery information;

[0038] A first determining module is used to determine whether the target vehicle needs to be supplemented with electric energy based on the target information;

[0039] a second determining module, configured to determine, if the target vehicle needs to supplement electric energy, a start-up condition and a generated power of a range extender of the target vehicle based on the target information;

[0040] A control module is configured to control the range extender to generate electricity with the generated power to supplement the electric energy of the target vehicle if the target vehicle meets the start-up condition, so as to improve the power generation efficiency of the range extender.

[0041] In a third aspect, the present application further provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method described in the first aspect when executing the computer program.

[0042] In a fourth aspect, the present application further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which implements the method described in the first aspect when executed by a processor.

[0043] In a fifth aspect, the present application further provides a computer program product, comprising a computer program, which implements the method described in the first aspect when executed by a processor.

[0044] The range-extended vehicle endurance control method and device provided in the present application determine whether the target vehicle needs to supplement electric energy through target information. If the target vehicle needs to supplement electric energy, the start-up conditions of the range extender are first determined. When the target vehicle meets the start-up conditions, the range extender is controlled to start power generation, thereby controlling the range extender to generate electricity at a high-efficiency operating point as much as possible, improving the vehicle's fuel consumption, and reducing the probability of the range extender generating electricity at a low-efficiency operating point, so as to improve the power generation efficiency of the range extender, thereby improving the range of the target vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0046] Figure 1 It is a schematic diagram of the universal characteristic curve of the engine provided by the background technology of this application;

[0047] Figure 2 This is a flow chart of a range-extended vehicle endurance control method provided in an embodiment of the present application;

[0048] Figure 3 1 is a flow chart of determining the start-up conditions of a range extender through a target model according to an embodiment of the present application;

[0049] Figure 4 This is a schematic diagram of the control overview of the range control method for an extended-range vehicle provided in an embodiment of the present application;

[0050] Figure 5 This is a schematic structural diagram of a range-extended vehicle endurance control device provided in an embodiment of the present application;

[0051] Figure 6 It is a structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0053] An embodiment of the present application provides a method for controlling the endurance of an extended-range vehicle, the execution subject of which may be an electronic device, for example, a controller. The following description will take the controller as an example in which the execution subject of the method is a controller. Figure 2 This is a flow chart of the range-extended vehicle endurance control method provided by the embodiment of the present application. Figure 2 , the method may include:

[0054] Step 210: When the target vehicle starts navigation, obtain target information of the target vehicle; the target information includes navigation information and battery information;

[0055] Step 220: Determine whether the target vehicle needs to be supplemented with electric energy based on the target information;

[0056] Step 230: If the target vehicle needs to supplement electric energy, determine the start-up conditions and power generation capacity of the range extender of the target vehicle based on the target information;

[0057] Step 240: If the target vehicle meets the start-up conditions, the range extender is controlled to generate electricity to supplement the electric energy of the target vehicle, so as to improve the power generation efficiency of the range extender.

[0058] Range-extended vehicles typically manage their power based on the balance point. When the vehicle's power level is above the balance point, it operates in pure electric mode. When the vehicle's power level is below the balance point, the range extender activates. This control scheme controls the vehicle's power generation, consumption, and power maintenance functions based on the balance point. This application proposes a new control scheme to reduce the range extender's operation at low vehicle speeds, as follows:

[0059] In step 210 , the controller may identify whether the navigation of the target vehicle is turned on, and may obtain target information if the navigation of the target vehicle is turned on.

[0060] In step 220, the controller can determine whether the target vehicle needs to be recharged based on the target information. Specifically, based on the target information, the controller can calculate the power required for the target vehicle to pass and the power that the target vehicle's battery can provide, thereby determining whether the target vehicle needs to be recharged.

[0061] In step 230, if the controller determines that the target vehicle needs to be recharged, it can further calculate the activation conditions and power generation capacity of the range extender. The range extender will only generate power when the target vehicle meets the activation conditions. The range extender has a higher power generation efficiency when the activation conditions are met.

[0062] In step 240 , the controller may control the range extender to generate electricity with the generated power to supplement the electric energy of the target vehicle if the target vehicle meets the starting conditions.

[0063] The range-extended vehicle endurance control method provided in the embodiment of the present application determines whether the target vehicle needs to supplement electric energy through target information. If the target vehicle needs to supplement electric energy, the start-up conditions of the range extender are first determined. When the target vehicle meets the start-up conditions, the range extender is controlled to start power generation, thereby controlling the range extender to generate electricity at a high-efficiency operating point as much as possible, improving the vehicle's fuel consumption, and reducing the probability of the range extender generating electricity at a low-efficiency operating point, so as to improve the power generation efficiency of the range extender, thereby improving the range of the target vehicle.

[0064] In some embodiments, the navigation information includes at least one of the current vehicle speed, the current average vehicle speed, the target mileage for the entire navigation journey, the first estimated travel time for the entire navigation journey, the current traffic congestion level, the congested road section information, and the target distance between the target vehicle and the congested road section; the battery information includes at least one of the current power level and the current balance point power level; the congested road section information includes at least one of the target length of the congested road section and the second estimated travel time of the congested road section.

[0065] The range-extended vehicle endurance control method provided in the embodiment of the present application determines whether the target vehicle needs to supplement electric energy through target information. When the target vehicle needs to supplement electric energy, the start-up conditions of the range extender are first determined. When the target vehicle meets the start-up conditions, the range extender is controlled to start power generation, thereby controlling the range extender to generate electricity at a high-efficiency operating point as much as possible and reducing the probability of generating electricity at a low-efficiency operating point, so as to improve the power generation efficiency of the range extender and thus improve the range of the target vehicle.

[0066] In some embodiments, within a first period of time after the start-up time of the target vehicle, based on the target information, it is determined whether the target vehicle needs to replenish electric energy, including: determining the expected average speed of the target vehicle based on the target mileage and the first expected travel time; determining the first electric energy required for the target vehicle to travel the target mileage based on the expected average speed; determining the second electric energy that the target vehicle can consume from the current power to the current balance point; if the first electric energy is greater than the second electric energy, it is determined that the target vehicle is in a first energy replenishment situation where electric energy needs to be replenished, and the difference between the first electric energy and the second electric energy is used as the first electric energy to be replenished for the target vehicle; wherein, the start-up time is the time when the target vehicle starts to travel the entire navigation journey.

[0067] The first energy replenishment situation is actually when the target vehicle is just started and it is predicted that the target vehicle's power is insufficient to support the entire navigation journey. Specifically, the controller divides the target mileage by the first estimated travel time to obtain the estimated average speed of the target vehicle. The estimated average speed can be used to predict the first power E0 required for the target vehicle to complete the entire navigation journey. The controller can also determine the second power E1 that the target vehicle can consume from the current power to the current balance point. When the first power is greater than the second power, it is determined that the target vehicle is in the first energy replenishment situation where power replenishment is required. The power that needs to be replenished at this time is the first power to be replenished ΔE1, which is the difference between the first power and the second power: ΔE1 = E0-E1.

[0068] Furthermore, in one embodiment, within a second time period from the start time to the stop time of the target vehicle, based on the target information, it is determined whether the target vehicle needs to replenish electric energy, including: if it is determined based on the target information that there is a congested road section ahead of the target vehicle, and the predicted power of the target vehicle when it reaches the entrance of the congested road section is less than or equal to the current balance point power, it is determined that the target vehicle is in a second replenishment situation where electric energy needs to be replenished, and based on the target length and the second estimated travel time, the second electric energy to be replenished of the target vehicle is determined; wherein, the start time is the time when the target vehicle starts to travel the entire navigation journey, and the stop time is the time when the target vehicle completes the entire navigation journey.

[0069] If the target information contains information about a congested road section, or indicates a target distance between the target vehicle and the congested road section, it can be determined that there is a congested road section ahead of the target vehicle. The controller can predict the amount of energy required for the target vehicle to reach the entrance of the congested road section based on the target vehicle's current average speed, and then determine the predicted amount of energy required for the target vehicle to reach the entrance of the congested road section based on the target vehicle's current battery level. If there is a congested road section ahead of the target vehicle, and the predicted amount of energy required for the target vehicle to reach the entrance of the congested road section is less than or equal to the current equilibrium point, the controller can determine that the target vehicle is in a second energy replenishment state, requiring additional energy, and can determine the amount of energy required for the target vehicle to reach the congested road section based on the target distance and the second estimated travel time, namely the second amount of energy to be replenished, ΔE2.

[0070] Furthermore, the first energy recharge condition is predicted immediately upon the target vehicle's start-up, while the second energy recharge condition is continuously predicted throughout the target vehicle's navigation journey. In other words, upon the target vehicle's start-up, both the first and second energy recharge conditions can be predicted. During the subsequent driving process, only the second energy recharge condition is predicted. It is worth noting that if the target vehicle meets both the first and second energy recharge conditions immediately upon start-up, recharging will be performed according to the second energy recharge condition first, followed by recharging according to the first energy recharge condition.

[0071] The range-extended vehicle endurance control method provided in the embodiment of the present application determines whether the target vehicle needs to supplement electric energy through target information. When the target vehicle needs to supplement electric energy, the start-up conditions of the range extender are first determined. When the target vehicle meets the start-up conditions, the range extender is controlled to start power generation, thereby controlling the range extender to generate electricity at a high-efficiency operating point as much as possible and reducing the probability of generating electricity at a low-efficiency operating point, so as to improve the power generation efficiency of the range extender and thus improve the range of the target vehicle.

[0072] In some embodiments, based on the target information, the start-up conditions of the range extender of the target vehicle are determined, including: normalizing the current traffic congestion level, the second estimated travel time, the target distance, the current vehicle speed, the current power and the current balance point power to obtain normalized parameters; inputting the normalized parameters into the target model, and outputting the start-up conditions through the target model; the start-up conditions include vehicle speed start-up conditions and power start-up conditions.

[0073] The timing of electric energy compensation is very important. During the entire navigation journey, you can choose to perform power generation compensation when the target vehicle is on a smooth road and at a high speed. At this time, the range extender is in the high-efficiency zone. The timing of energy replenishment usually sets preconditions: the current level of traffic congestion (smooth traffic), the target distance from the congested section is far (sufficient power generation time), the current power (not too high, there is room for charging), the current speed > threshold (60km / h), etc. For example, if the target distance is < threshold S (30km), power generation can be carried out in advance, and the power generation amount is the electric energy ΔE2 that will be consumed in the congested section; if the current vehicle is in a congested section, the conditions for early power generation are not met; if the target distance is > threshold S, it means that the target vehicle is far away from the congested section and no early power generation is required.

[0074] Taking the above factors into consideration, the start condition of the range extender can be determined by the target model regardless of whether the target vehicle is in the first or second charging state. The target model can be a back propagation neural network (BP neural network) model. Figure 3 This is a flow chart of determining the start-up conditions of the range extender through the target model provided by the embodiment of the present application. Figure 3 As shown, the current traffic congestion level State traffic (3 represents super congestion, 2 represents congestion, 1 represents slight congestion, 0 represents smooth traffic), the second estimated travel time T Remain , the target distance S0 between the target vehicle and the congested road section, the current vehicle speed V, the current battery SOC1, and the current equilibrium point battery SOC2 are used as the input parameters of the neural network to obtain the vehicle speed starting condition V EngOn and power start condition SOC EngOnThat is to say, when the current speed of the target vehicle is higher than V EngOn , and the current power is lower than SOC EngOn When the target vehicle meets the starting conditions, the controller can control the range extender to start.

[0075] Furthermore, the target model can also output the shutdown condition V of the range extender EngOff and SOC EngOff When the current speed of the target vehicle is lower than V EngOff And the current power level is higher than the preset threshold, or the current power level is higher than SOC EngOff When the target vehicle meets the shutdown conditions, the controller can control the range extender to shut down. In other cases, the range extender can maintain the current start or shutdown state.

[0076] Furthermore, before the input parameters are input into the neural network, they can be normalized to eliminate the influence of different parameter dimensions and magnitudes on the results. The specific process is as follows:

[0077]

[0078] Among them, x nor is the normalized parameter, x is the original input parameter, x max is the maximum value in the original input parameter sequence, x min The minimum value in the original input parameter sequence.

[0079] The input layer of the target model reads the normalized parameters and passes them to the hidden layer. The neurons in the hidden layer calculate the result y Hid for:

[0080]

[0081] Among them, g Hid is the activation function of the hidden layer, y In and y Hid is the output of each neuron in the input layer and hidden layer, y In That is, the normalization parameter x nor , w Hid and b Hid is the network weight of the hidden layer, 0≤w Hid ≤1 and 0≤b Hid ≤1, n is the number of neurons in the input layer.

[0082] The processing from the hidden layer to the output layer can be expressed as:

[0083]

[0084] Among them, g Out is the activation function of the output layer, yOut is the starting condition and stopping condition of the output layer neuron output, that is, V EngOn , SOC EngOn and V EngOff , SOC EngOff , w Out and b Out is the network weight of the hidden layer, 0≤w Out ≤1 and 0≤b Out ≤1,y Hid is the output of each neuron in the hidden layer, and m is the number of neurons in the hidden layer.

[0085] The range control method for an extended-range vehicle provided in an embodiment of the present application uses the start-up conditions of the range extender of the target model. When the target vehicle meets the start-up conditions, the range extender is controlled to start power generation, thereby controlling the range extender to generate power at a high-efficiency operating point as much as possible and reducing the probability of generating power at a low-efficiency operating point, so as to improve the power generation efficiency of the range extender and thus improve the range of the target vehicle.

[0086] In some embodiments, when the target vehicle is in the first energy replenishment condition, the power generation power of the range extender of the target vehicle is determined based on the target information, including: searching for the target power corresponding to the current vehicle speed from a preset power table; the preset power table is a correspondence table between the current vehicle speed and the power generation power; and using the target power as the power generation power.

[0087] The preset power tables are as follows:

[0088] Current vehicle speed 50 60 80 100 120 140 ΔP1 0 2 3 4 5 5

[0089] Table 1 Preset power diagram

[0090] ΔP1 in the table is the generated power.

[0091] It is worth noting that the target vehicle's energy replenishment process may be a single energy replenishment or multiple energy replenishments. Taking the target vehicle in the first energy replenishment situation as an example, when the target vehicle meets the start-up conditions of the range extender, the controller controls the range extender to generate electricity at the generated power. If the target vehicle continues to meet the start-up conditions during the process of the generated power reaching the first energy to be replenished ΔE1 from zero, a single energy replenishment is sufficient; if the generated power has not yet reached the first energy to be replenished, the target vehicle does not meet the start-up conditions, and energy replenishment is stopped. When the target vehicle meets the start-up conditions again, energy replenishment continues until the replenishment energy reaches the first energy to be replenished. Specifically, the integral of the generated power ΔP1 and the replenishment time t1 can be used as the current accumulated replenishment energy. When the current accumulated replenishment energy is greater than or equal to the first energy to be replenished, the energy replenishment is completed, and the generated power cycle is zero until the next energy replenishment.

[0092] The extended-range vehicle endurance control method provided in the embodiment of the present application is such that when the target vehicle is in the first energy replenishment state, as the current vehicle speed increases, the overall power generation power shows an upward trend, which can avoid excessive power when the vehicle speed is low, causing noise complaints.

[0093] In some embodiments, when the target vehicle is in the second energy replenishment condition, the power generation power of the range extender of the target vehicle is determined based on the target information, including: determining the target duration based on the current average vehicle speed and the target distance; determining the initial power based on the second amount of electric energy to be replenished and the target duration; and correcting the initial power by a correction coefficient to obtain the power generation power.

[0094] The controller divides the target distance S0 by the current average vehicle speed to obtain the target duration t2. The controller then divides the second amount of energy to be replenished, ΔE2, by the target duration t2 to obtain the initial power. The controller then applies a correction factor to the initial power to obtain the generated power ΔP2. The logic for correcting the initial power using the correction factor is as follows: at lower speeds, the generated power is less than the initial power; at higher speeds, the generated power is greater than the initial power. If the target vehicle is in congested traffic, no initial power correction is required.

[0095] The range-extended vehicle endurance control method provided in the embodiment of the present application determines the initial power by using the current average vehicle speed, the target distance and the second amount of electrical energy to be replenished when the target vehicle is in the first energy replenishment state, and then corrects the initial power according to the current vehicle speed using a correction coefficient to obtain the generated power, thereby ensuring the safety of power generation by the range extender.

[0096] In some embodiments, when the target vehicle is in the second energy replenishment situation, the extended-range vehicle endurance control method also includes: if the distance between the target vehicle and the congested road section is greater than a preset threshold, based on the second amount of electric energy to be replenished, the value of the current balance point power is increased; if the target vehicle is in a congested road section and the start-up conditions are not met before the target vehicle reaches the congested road section, based on the second amount of electric energy to be replenished, the value of the current balance point power is decreased.

[0097] When the target vehicle meets the start-up conditions of the range extender, it can generate electricity in advance. The amount of electricity generated = the second amount of electricity to be supplemented ΔE2 (electricity is consumed when passing through congested roads). At this time, the value of the current balance point electricity can be increased. The balance point electricity adjustment value ΔSOC = ΔE2 / battery nominal energy, which means that the current current balance point electricity is the original current balance point electricity plus ΔSOC. By increasing the current balance point electricity, the increase in the target vehicle's electricity can be controlled. Specifically, if the current electricity is much higher than the original current balance point electricity, after increasing ΔSOC, the current electricity is still higher than the current current balance point electricity, then pure electric operation will still be unaffected; if the current electricity is near the original current balance point electricity, increasing the original current balance point electricity can allow early starting, and the power generation target will be increased accordingly.

[0098] If the target vehicle does not meet the starting conditions, in order to ensure that the target vehicle passes through the current congested section, the original current balance point power needs to be lowered, ΔSOC = -ΔE2 / battery nominal energy, that is, the current current balance point power is the original current balance point power plus ΔSOC (negative value), to ensure that the range extender does not start in this congested section.

[0099] The range-extended vehicle endurance control method provided in the embodiment of the present application determines whether the target vehicle needs to supplement electric energy through target information. When the target vehicle needs to supplement electric energy, the start-up conditions of the range extender are first determined. When the target vehicle meets the start-up conditions, the range extender is controlled to start power generation, thereby controlling the range extender to generate electricity at a high-efficiency operating point as much as possible and reducing the probability of generating electricity at a low-efficiency operating point, so as to improve the power generation efficiency of the range extender and thus improve the range of the target vehicle.

[0100] In some embodiments, the range-extended vehicle endurance control method further includes: when the target vehicle does not turn on navigation, obtaining the current speed, current battery level and current balance point battery level of the target vehicle; if the current battery level is lower than the current balance point battery level, the current battery level is higher than a preset battery level threshold, and the current speed is lower than the preset speed threshold, controlling the range extender to shut down.

[0101] If the target vehicle does not have navigation turned on, the controller can obtain the current speed, current power and current balance point power of the target vehicle. If the current power is lower than the current balance point power (for example, 20% power), the current power is higher than the preset power threshold (for example, 15% power), and the current speed is lower than the preset speed threshold (for example, 30km / h), the range extender is controlled to shut down, as shown in the following table:

[0102]

[0103] Table 2 Range extender start-stop strategy when the target vehicle does not have navigation turned on

[0104] The power consumed by the target vehicle during shutdown is balanced by generating more power at high speeds, keeping the current power close to the current equilibrium point power.

[0105] When the target vehicle is operating at a low speed, which usually means that the target vehicle is passing through a congested road, a fixed threshold of 5% (the difference between the current balance point power and the preset power threshold) can be set. By default, the 5% threshold power can be used to pass most congested roads in pure electric mode, ensuring that the range extender is shut down when the vehicle is traveling at a low speed in congested roads. In this case, the current balance point power and the range extender's power generation power are not adjusted, and the vehicle operates according to the basic logic.

[0106] The range-extended vehicle endurance control method provided in an embodiment of the present application controls the range extender to shut down if the current battery level of the target vehicle is between the current balance point battery level and a preset battery level threshold, and the current vehicle speed is less than the preset vehicle speed threshold, when the target vehicle does not have navigation turned on. This reduces the probability of generating electricity at a low-efficiency operating point, thereby improving the power generation efficiency of the range extender and thus improving the range of the target vehicle.

[0107] Based on the description of the above embodiments, the overall control concept of the range control method for an extended-range vehicle provided in this application is as follows:

[0108] Prioritize electricity: When the power level is above the balance point, pure electric operation is performed; global navigation prioritizes pure electric operation, and low speeds guarantee pure electric operation;

[0109] On-demand energy storage: Global prediction, pure electric power shortage, on-demand energy replenishment; congestion prediction, pure electric traffic, on-demand energy storage;

[0110] Generate first, use later: Generate electricity in advance when traffic is unobstructed, and use electricity when traffic is congested;

[0111] Use first and pay later: If the traffic is currently congested, use pure electric power. Pay later when the traffic is unobstructed.

[0112] Figure 4 This is a schematic diagram of the control overview of the extended-range vehicle endurance control method provided in an embodiment of the present application, which can be referred to in conjunction with the above description.

[0113] The extended-range vehicle endurance control device provided in the present application is described below. The extended-range vehicle endurance control device described below and the extended-range vehicle endurance control method described above can be referenced to each other.

[0114] Figure 5 This is a schematic diagram of the structure of the range-extended vehicle endurance control device provided in the embodiment of the present application. Figure 5 The range-extended vehicle endurance control device provided in the embodiment of the present application may include:

[0115] The acquisition module 510 is used to obtain target information of the target vehicle when the target vehicle starts navigation; the target information includes navigation information and battery information;

[0116] A first determining module 520 is configured to determine whether the target vehicle needs to be supplemented with electric energy based on the target information;

[0117] A second determining module 530 is configured to determine, if the target vehicle needs to supplement electric energy, a start-up condition and a generated power of a range extender of the target vehicle based on the target information;

[0118] The control module 540 is configured to control the range extender to generate electricity with the generated power to supplement the electric energy of the target vehicle if the target vehicle meets the start-up condition, so as to improve the power generation efficiency of the range extender.

[0119] The range-extended vehicle endurance control device provided in the embodiment of the present application determines whether the target vehicle needs to supplement electric energy through target information. When the target vehicle needs to supplement electric energy, the start-up conditions of the range extender are first determined. When the target vehicle meets the start-up conditions, the range extender is controlled to start power generation, thereby controlling the range extender to generate electricity at a high-efficiency operating point as much as possible, improving the vehicle's fuel consumption, and reducing the probability of the range extender generating electricity at a low-efficiency operating point, so as to improve the power generation efficiency of the range extender, thereby improving the endurance of the target vehicle.

[0120] In some embodiments, the navigation information includes the current vehicle speed, the current average vehicle speed, the target mileage of the entire navigation journey, the first estimated travel time of the entire navigation journey, the current traffic congestion level, the congested road section information, and at least one of the target distance between the target vehicle and the congested road section; the battery information includes at least one of the current power level and the current balance point power level; the congested road section information includes at least one of the target length of the congested road section and the second estimated travel time of the congested road section.

[0121] In some embodiments, within a first time period after the start-up moment of the target vehicle, the first determining module is configured to:

[0122] Determining an estimated average speed of the target vehicle based on the target mileage and the first estimated travel time;

[0123] determining a first electric energy required for the target vehicle to travel the target mileage based on the estimated average vehicle speed;

[0124] Determining a second electric energy that can be consumed by the target vehicle from the current electric energy to the current balance point electric energy;

[0125] If the first electric energy is greater than the second electric energy, determining that the target vehicle is in a first energy replenishment situation in which electric energy needs to be replenished, and using the difference between the first electric energy and the second electric energy as a first electric energy to be replenished for the target vehicle;

[0126] The starting time is the time when the target vehicle starts to travel the entire navigation journey.

[0127] In some embodiments, within a second time period from the start time to the stop time of the target vehicle, the first determining module is configured to:

[0128] If it is determined based on the target information that there is a congested road section ahead of the target vehicle, and the predicted power of the target vehicle when arriving at the entrance of the congested road section is less than or equal to the current balance point power, it is determined that the target vehicle is in a second energy replenishment situation in which electric energy needs to be replenished, and a second amount of electric energy to be replenished of the target vehicle is determined based on the target length and the second estimated travel time;

[0129] The start time is the time when the target vehicle starts to travel the entire navigation journey, and the stop time is the time when the target vehicle completes the entire navigation journey.

[0130] In some embodiments, the second determining module is configured to:

[0131] Normalizing the current traffic congestion level, the second estimated travel time, the target distance, the current vehicle speed, the current battery level, and the current equilibrium point battery level to obtain a normalized parameter;

[0132] The normalized parameters are input into a target model, and the start-up conditions are output through the target model; the start-up conditions include a vehicle speed start-up condition and a power start-up condition.

[0133] In some embodiments, when the target vehicle is in the first energy replenishment condition, the second determination module is configured to:

[0134] searching a target power corresponding to the current vehicle speed from a preset power table; the preset power table is a table of correspondence between the current vehicle speed and the generated power;

[0135] The target power is used as the generated power.

[0136] In some embodiments, when the target vehicle is in the second energy replenishment condition, the second determination module is configured to:

[0137] determining a target duration based on the current average vehicle speed and the target distance;

[0138] determining an initial power based on the second electric energy to be replenished and the target duration;

[0139] The initial power is corrected by a correction coefficient to obtain the generated power.

[0140] In some embodiments, when the target vehicle is in the second energy replenishment condition, the control module is further configured to:

[0141] If the target vehicle meets the starting condition, based on the second electric energy to be replenished, the value of the current balance point electric energy is increased;

[0142] If the target vehicle does not meet the starting condition, and the starting condition is not met before the target vehicle reaches the congested road section, the value of the current balance point power is lowered based on the second electric energy to be replenished.

[0143] In some embodiments, the control module is further configured to:

[0144] When the target vehicle does not have navigation turned on, obtaining the current speed, current power level and current balance point power level of the target vehicle;

[0145] If the current power level is lower than the current balance point power level, the current power level is higher than a preset power level threshold, and the current vehicle speed is lower than a preset vehicle speed threshold, the range extender is controlled to shut down.

[0146] Specifically, the above-mentioned extended-range vehicle endurance control device provided in the embodiment of the present application can implement all the method steps implemented by the above-mentioned method embodiment in which the execution subject is the controller, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0147] Figure 6 Schematic diagram of the structure of the electronic device provided in the embodiment of the present application. Figure 6 As shown, the electronic device may include: a processor 610, a communication interface 620, a memory 630 and a communication bus 640, wherein the processor 610, the communication interface 620, and the memory 630 communicate with each other via the communication bus 640. The processor 610 may call the logic instructions in the memory 630 to execute the range control method of the extended-range vehicle, for example, including:

[0148] When the target vehicle starts navigation, obtaining target information of the target vehicle; the target information includes navigation information and battery information;

[0149] Based on the target information, determining whether the target vehicle needs to be supplemented with electric energy;

[0150] If the target vehicle needs to supplement electric energy, determining the start-up conditions and power generation capacity of the range extender of the target vehicle based on the target information;

[0151] If the target vehicle meets the start-up condition, the range extender is controlled to generate electricity with the generated power to supplement the electric energy of the target vehicle, so as to improve the power generation efficiency of the range extender.

[0152] In addition, the logic instructions in the above-mentioned memory 630 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0153] On the other hand, the present application also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the range control method for an extended-range vehicle provided by the above methods are implemented, for example, including:

[0154] When the target vehicle starts navigation, obtaining target information of the target vehicle; the target information includes navigation information and battery information;

[0155] Based on the target information, determining whether the target vehicle needs to be supplemented with electric energy;

[0156] If the target vehicle needs to supplement electric energy, determining the start-up conditions and power generation capacity of the range extender of the target vehicle based on the target information;

[0157] If the target vehicle meets the start-up condition, the range extender is controlled to generate electricity with the generated power to supplement the electric energy of the target vehicle, so as to improve the power generation efficiency of the range extender.

[0158] In another aspect, the present application further provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can perform the steps of the range control method for an extended-range vehicle provided by the above methods, for example, including:

[0159] When the target vehicle starts navigation, obtaining target information of the target vehicle; the target information includes navigation information and battery information;

[0160] Based on the target information, determining whether the target vehicle needs to be supplemented with electric energy;

[0161] If the target vehicle needs to supplement electric energy, determining the start-up conditions and power generation capacity of the range extender of the target vehicle based on the target information;

[0162] If the target vehicle meets the start-up condition, the range extender is controlled to generate electricity with the generated power to supplement the electric energy of the target vehicle, so as to improve the power generation efficiency of the range extender.

[0163] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0164] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0165] It should also be noted that in the embodiments of the present application, the terms "first," "second," etc. are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein. The objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more.

[0166] In the embodiments of the present application, the term "and / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0167] In the embodiments of the present application, "determine B based on A" means that the factor A must be considered when determining B. It is not limited to "B can be determined based on A alone", and should also include: "determine B based on A and C", "determine B based on A, C and E", "determine C based on A, and further determine B based on C", etc. It can also include taking A as a condition for determining B, for example, "when A meets the first condition, use the first method to determine B"; for example, "when A meets the second condition, determine B", etc.; for example, "when A meets the third condition, determine B based on the first parameter", etc. Of course, it can also be a condition that takes A as a factor in determining B, for example, "when A meets the first condition, use the first method to determine C, and further determine B based on C", etc.

[0168] In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar thereto.

[0169] In the embodiments of the present application, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0170] In the embodiments of this application, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0171] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0172] In the embodiments of the present application, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the embodiments of the present application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0173] Finally, it should be noted that 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. However, 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.

Claims

1. A range control method for an extended-range vehicle, characterized in that: include: When the target vehicle starts navigation, obtaining target information of the target vehicle; The target information includes navigation information and battery information; Based on the target information, determining whether the target vehicle needs to be supplemented with electric energy; If the target vehicle needs to supplement electric energy, determining the start-up conditions and power generation capacity of the range extender of the target vehicle based on the target information; If the target vehicle meets the start-up condition, the range extender is controlled to generate electricity with the generated power to supplement the electric energy of the target vehicle, so as to improve the power generation efficiency of the range extender.

2. The range control method for an extended-range vehicle according to claim 1, characterized in that: The navigation information includes at least one of the current vehicle speed, the current average vehicle speed, the target mileage of the entire navigation journey, the first estimated travel time of the entire navigation journey, the current traffic congestion level, the congested road section information, and the target distance between the target vehicle and the congested road section; the battery information includes at least one of the current power level and the current balance point power level; the congested road section information includes at least one of the target length of the congested road section and the second estimated travel time of the congested road section.

3. The range control method for an extended-range vehicle according to claim 2, characterized in that: Within a first time period after the start-up moment of the target vehicle, determining whether the target vehicle needs to supplement electric energy based on the target information includes: Determining an estimated average speed of the target vehicle based on the target mileage and the first estimated travel time; determining a first electric energy required for the target vehicle to travel the target mileage based on the estimated average vehicle speed; Determining a second electric energy that can be consumed by the target vehicle from the current electric energy to the current balance point electric energy; If the first electric energy is greater than the second electric energy, determining that the target vehicle is in a first energy replenishment situation in which electric energy needs to be replenished, and using the difference between the first electric energy and the second electric energy as a first electric energy to be replenished for the target vehicle; The starting time is the time when the target vehicle starts to travel the entire navigation journey.

4. The range control method for an extended-range vehicle according to claim 2, characterized in that: During a second time period from the start time to the stop time of the target vehicle, determining whether the target vehicle needs to supplement electric energy based on the target information includes: If it is determined based on the target information that there is a congested road section ahead of the target vehicle, and the predicted power of the target vehicle when arriving at the entrance of the congested road section is less than or equal to the current balance point power, it is determined that the target vehicle is in a second energy replenishment situation in which electric energy needs to be replenished, and a second amount of electric energy to be replenished of the target vehicle is determined based on the target length and the second estimated travel time; The start time is the time when the target vehicle starts to travel the entire navigation journey, and the stop time is the time when the target vehicle completes the entire navigation journey.

5. The range control method for an extended-range vehicle according to claim 2, characterized in that: The determining, based on the target information, a start condition of the range extender of the target vehicle includes: Normalizing the current traffic congestion level, the second estimated travel time, the target distance, the current vehicle speed, the current battery level, and the current equilibrium point battery level to obtain a normalized parameter; The normalized parameters are input into a target model, and the start-up conditions are output through the target model; the start-up conditions include a vehicle speed start-up condition and a power start-up condition.

6. The range control method for an extended-range vehicle according to claim 3, characterized in that: When the target vehicle is in the first energy replenishment state, determining the power generation power of the range extender of the target vehicle based on the target information includes: searching a target power corresponding to the current vehicle speed from a preset power table; the preset power table is a table of correspondence between the current vehicle speed and the generated power; The target power is used as the generated power.

7. The range control method for an extended-range vehicle according to claim 4, characterized in that: When the target vehicle is in the second energy replenishment condition, determining the power generation power of the range extender of the target vehicle based on the target information includes: determining a target duration based on the current average vehicle speed and the target distance; determining an initial power based on the second electric energy to be replenished and the target duration; The initial power is corrected by a correction coefficient to obtain the generated power.

8. The range control method for an extended-range vehicle according to claim 4, characterized in that: When the target vehicle is in the second energy replenishment condition, the method further includes: If the target vehicle meets the starting condition, based on the second electric energy to be replenished, the value of the current balance point electric energy is increased; If the target vehicle does not meet the starting condition, and the starting condition is not met before the target vehicle reaches the congested road section, the value of the current balance point power is lowered based on the second electric energy to be replenished.

9. The range control method for an extended-range vehicle according to claim 1, characterized in that: Also includes: When the target vehicle does not have navigation turned on, obtain the current speed, current power level and current balance point power level of the target vehicle; If the current power level is lower than the current balance point power level, the current power level is higher than a preset power level threshold, and the current vehicle speed is lower than a preset vehicle speed threshold, the range extender is controlled to shut down.

10. A range-extended vehicle endurance control device, characterized in that: include: An acquisition module is used to obtain target information of a target vehicle when the target vehicle starts navigation; The target information includes navigation information and battery information; A first determining module is used to determine whether the target vehicle needs to be supplemented with electric energy based on the target information; a second determining module, configured to determine, if the target vehicle needs to supplement electric energy, a start-up condition and a generated power of a range extender of the target vehicle based on the target information; A control module is configured to control the range extender to generate electricity with the generated power to supplement the electric energy of the target vehicle if the target vehicle meets the start-up condition, so as to improve the power generation efficiency of the range extender.

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