Power generation control method, device and equipment of range extender and storage medium

Abstract

The invention relates to a power generation control method and device of a range extender, equipment and a storage medium. The method comprises the steps that after vehicle navigation is started, travel energy consumption information generated by vehicle navigation is obtained, and battery parameter information of a vehicle is obtained; determining a mode demand type according to the travel energy consumption information and the battery parameter information; under the condition that the mode demand type is determined to be the range extending mode type, starting a range extender; and according to the stroke energy consumption information and the battery parameter information, determining the generated power corresponding to the range extender, and performing power generation control on the range extender according to the generated power. The range extender is started when the range extending mode type is judged, the range extender does not need to be started when the charge state value drops to the first charge state threshold value, sufficient power supply of the vehicle is ensured, particularly in a low-temperature environment, the range extender is started in advance, the power generation performance of the range extender can be improved, the power generation power of an engine is improved, and the power generation duration of the engine is prolonged. And the problem of insufficient combustion and consumption of fuel oil in an engine cylinder is avoided.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a power generation control method, device, equipment and storage medium for a range extender. Background Art

[0002] Range-extended vehicles are also called hybrid vehicles. When the power battery of a range-extended vehicle is fully charged, the power battery drives the motor to meet the vehicle's driving power requirements; when the power battery drops to a certain level, the range extender will be started to charge the power battery through the range extender's engine.

[0003] Currently, in low-temperature environments, the range extender's engine faces additional challenges in starting and running. The engine not only needs to be successfully started, but also needs to run at idle for a period of time to ensure that all components are fully lubricated and the power generation system can work properly. However, in low-temperature environments, the performance of the range extender vehicle decreases, resulting in the engine's power generation being too low or the power generation time being insufficient, which in turn leads to insufficient combustion and consumption of the fuel in the engine cylinder. In the long run, the engine will not ignite normally, causing the vehicle to break down. Summary of the invention

[0004] The present application provides a power generation control method, device, equipment and storage medium for a range extender to solve the problem that the performance of the range extender vehicle is degraded in a low temperature environment, resulting in low engine power generation or insufficient power generation time, leading to incomplete combustion and consumption of fuel in the engine cylinder.

[0005] In view of the above technical problems, the technical solution of this application is solved by the following embodiments:

[0006] An embodiment of the present application also provides a power generation control method for a range extender, comprising: after a preset vehicle navigation is started, obtaining trip energy consumption information generated by the vehicle navigation and obtaining battery parameter information of the vehicle; determining a mode requirement type according to the trip energy consumption information and the battery parameter information; when it is determined that the mode requirement type is an extended-range mode type, starting the range extender; determining a power generation power corresponding to the range extender according to the trip energy consumption information and the battery parameter information and controlling the power generation of the range extender according to the power generation power.

[0007] Among them, determining the mode requirement type according to the trip energy consumption information and the battery parameter information includes: determining the available power according to the charge state value, the first charge state threshold and the full charge of the battery in the battery parameter information; determining the protection power according to the charge state value, the second charge state threshold and the full charge of the battery in the battery parameter information; wherein the first charge state threshold is greater than the second charge state threshold; if the available power and the protection power are both less than the trip power consumption in the trip energy consumption information, then determining that the mode requirement type is an extended-range mode type.

[0008] Wherein, starting the range extender includes: detecting the coolant temperature at the engine position of the range extender; if the coolant temperature is greater than a preset temperature threshold, starting the range extender and controlling the range extender to idle for a first idle time; otherwise, starting the range extender and controlling the range extender to idle for a second idle time; wherein the second idle time is greater than the first idle time.

[0009] Among them, the determining the power generation corresponding to the range extender according to the trip energy consumption information and the battery parameter information includes: determining the trip power generation according to the segmented driving length corresponding to each speed segment in the trip energy information and the power generation pre-set for each speed segment; determining the available power according to the charge state value, the first charge state threshold and the full charge of the battery in the battery parameter information; determining the extended-range power requirement according to the trip power consumption and the available power in the trip energy consumption information; if the trip power generation is greater than or equal to the extended-range power requirement, determining the power generation corresponding to the speed segment to which the vehicle speed belongs as the candidate power generation; otherwise, determining the candidate power generation according to the power generation corresponding to the speed segment to which the vehicle speed belongs, the extended-range power requirement, the trip power generation and the full-trip driving time in the trip energy consumption information; and taking the minimum value between the determined candidate power generation and the preset protection power as the power generation corresponding to the range extender.

[0010] Among them, the trip power generation is determined according to the segmented driving length corresponding to each vehicle speed segment in the trip energy information and the power generation power pre-set for each vehicle speed segment, including: for each vehicle speed segment, the product of the segmented driving time corresponding to the vehicle speed segment and the power generation power corresponding to the vehicle speed segment is determined as the segmented power generation corresponding to the vehicle speed segment; the sum of the segmented power generation corresponding to multiple vehicle speed divisions is determined as the trip power generation.

[0011] The controlling of power generation of the range extender according to the power generation comprises: when starting the range extender, detecting the coolant temperature at the engine position of the range extender; querying a preset target speed query table for a target speed corresponding to the coolant temperature and the power generation; determining a target torque according to the target speed; and controlling the engine of the range extender to operate according to the target speed and the target torque.

[0012] Wherein, before the querying of the target speed corresponding to the coolant temperature and the generated power, it also includes: in the vehicle testing phase, performing the following operations for each preset test generated power: for each preset coolant temperature, controlling the test range extender to operate according to the generated speed and generated torque corresponding to the generated power; detecting the real-time speed and real-time torque of the test range extender; if the real-time speed is normal and the real-time torque is normal, determining the real-time speed as the target speed, and determining the real-time torque as the target torque; recording at least the coolant temperature, the test generated power, and the target speed in the speed query table; if the real-time speed is abnormal or the real-time torque is abnormal, adjusting the generated speed and the generated torque, controlling the test range extender to continue to operate according to the adjusted generated speed and generated torque, and continuing to detect the real-time speed and real-time torque of the test range extender; wherein the product of the adjusted generated speed and the generated torque is the same as that before the adjustment.

[0013] An embodiment of the present application also provides a power generation control device for a range extender, comprising: an acquisition module, used to acquire, after a preset vehicle navigation is started, trip energy consumption information generated by the vehicle navigation and battery parameter information of the vehicle; a determination module, used to determine a mode requirement type according to the trip energy consumption information and the battery parameter information; a start module, used to start the range extender when it is determined that the mode requirement type is an extended-range mode type; and a control module, used to determine, according to the trip energy consumption information and the battery parameter information, the power generation power corresponding to the range extender and to control the power generation of the range extender according to the power generation power.

[0014] An embodiment of the present application also provides a power generation control device for a range extender, comprising: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; and at least one memory connected to the at least one bus, wherein the processor is configured to: execute a power generation control program for the range extender stored in the memory to implement any of the power generation control methods for the range extender described above.

[0015] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed to implement any of the above-mentioned methods for controlling power generation of a range extender.

[0016] The above technical solution provided by the embodiment of the present application has the following advantages over the prior art: the method provided by the embodiment of the present application can obtain the trip energy consumption information generated by the vehicle navigation and the battery parameter information of the vehicle after the preset vehicle navigation is started; determine the mode requirement type according to the trip energy consumption information and the battery parameter information; start the range extender when it is determined that the mode requirement type is the extended-range mode type; determine the power generation corresponding to the range extender according to the trip energy consumption information and the battery parameter information and control the power generation of the range extender according to the power generation power. When the embodiment of the present application determines that the mode requirement type is the extended-range mode type, the range extender can be started without waiting until the charge state value of the power battery drops to the first charge state threshold value to start the range extender, ensuring sufficient power supply for the vehicle, especially in low temperature environments. This method of starting the range extender in advance can improve the power generation performance of the range extender, increase the power generation power and power generation time of the engine of the range extender, and avoid the problem of insufficient combustion and consumption of fuel in the engine cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0020] Figure 1 is a flow chart of a power generation control method for a range extender according to an embodiment of the present application;

[0021] Figure 2 A flowchart of the steps for determining the mode requirement type according to an embodiment of the present application;

[0022] Figure 3is a flow chart of the steps for determining the generated power according to an embodiment of the present application;

[0023] Figure 4 A flow chart of power generation control steps of a range extender according to an embodiment of the present application;

[0024] Figure 5 is a schematic diagram of an efficiency diagram of a range extender system according to an embodiment of the present application;

[0025] Figure 6 is a flow chart of the steps for correcting power generation parameters according to an embodiment of the present application;

[0026] Figure 7 is a structural diagram of a power generation control device for a range extender according to an embodiment of the present application;

[0027] Figure 8 4 is a structural diagram of a power generation control device of a range extender according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0029] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0030] The present application embodiment provides a method for controlling power generation of a range extender. Figure 1 , which is a flow chart of a power generation control method for a range extender according to an embodiment of the present application.

[0031] Step S110, after the preset vehicle navigation is started, the travel energy consumption information generated by the vehicle navigation is obtained and the battery parameter information of the vehicle is obtained.

[0032] Vehicle navigation is an application that provides route planning for users. The vehicle navigation is installed in the vehicle terminal or in the user's mobile terminal. If the vehicle navigation is installed in the mobile terminal, the mobile terminal establishes a connection with the vehicle controller so that the vehicle controller can communicate and interact with the vehicle navigation in the mobile terminal.

[0033] The trip energy consumption information is the trip information and energy consumption information corresponding to the trip route generated by the vehicle navigation according to the trip starting position and the trip ending position.

[0034] The type of vehicle is a range-extended vehicle.

[0035] The battery parameter information is the parameter information of the vehicle's power battery. For example, the battery parameter information includes but is not limited to the state of charge (SOC). The state of charge is the percentage of the remaining power of the power battery to the full power of the battery.

[0036] Step S120: determining a mode requirement type according to the travel energy consumption information and the battery parameter information.

[0037] Mode demand types include: extended range mode and other modes. Other modes include but are not limited to: pure electric mode.

[0038] Step S130: when it is determined that the mode requirement type is the extended-range mode type, starting the range extender.

[0039] When it is determined that the mode requirement type is the range-extending mode type, the range extender is started and the range extender is operated at idle speed. Idle speed operation means that the range extender operates at a preset fixed speed after being started, but does not generate electricity. The time of idling operation can be determined according to demand.

[0040] When the vehicle navigation is not started, the range extender can be started in the original way, that is, the charge state value of the power battery is detected, and when the charge state value drops to the first charge state threshold, the range extender is started. The first charge state threshold is a critical value for starting the range extender. The first charge state threshold is an empirical value or a value obtained through experiments.

[0041] Step S140: determining the power generation corresponding to the range extender according to the travel energy consumption information and the battery parameter information, and controlling the power generation of the range extender according to the power generation.

[0042] After determining the power generation corresponding to the range extender, the target speed and target torque corresponding to the power generation are queried, and the range extender is controlled to operate according to the target speed and target torque.

[0043] In an embodiment of the present application, after the preset vehicle navigation is started, the trip energy consumption information generated by the vehicle navigation is obtained and the battery parameter information of the vehicle is obtained; the mode requirement type is determined according to the trip energy consumption information and the battery parameter information; when it is determined that the mode requirement type is the extended-range mode type, the range extender is started; according to the trip energy consumption information and the battery parameter information, the power generation corresponding to the range extender is determined and the range extender is controlled to generate power according to the power generation power. In the embodiment of the present application, when it is determined that the mode requirement type is the extended-range mode type, the range extender can be started without waiting until the charge state value of the power battery drops to the first charge state threshold value to start the range extender, ensuring that the vehicle has sufficient power supply, especially in low temperature environments. This method of starting the range extender in advance can improve the power generation performance of the range extender, increase the power generation power and power generation time of the engine of the range extender, and avoid the problem of insufficient combustion and consumption of fuel in the engine cylinder.

[0044] In order to make the embodiments of the present application easier to understand, the power generation control method of the range extender of the embodiments of the present application is further described below.

[0045] In the embodiment of the present application, when the coolant temperature corresponding to the engine of the range extender is less than a preset temperature threshold, or after the vehicle is started, it can be detected whether the vehicle navigation is started; after the vehicle navigation is started, the trip energy consumption information generated by the vehicle navigation is obtained and the battery parameter information of the vehicle is obtained. Among them, the low temperature threshold is used to measure whether the vehicle is currently driving in a low temperature environment.

[0046] A temperature sensor may be provided at a location where the cooling system cools the engine; the temperature sensor is used to detect the coolant temperature.

[0047] The energy consumption information of the trip includes but is not limited to: the total mileage S, the total driving time t 行 , travel power consumption E 耗 , the segmented driving length t corresponding to each speed segment 分 . Among them, the total mileage refers to the length of the route between the starting position of the trip and the end position of the trip. The total driving time refers to the estimated time when the vehicle travels from the starting position of the trip to the end position of the trip. The trip power consumption refers to the estimated power consumption when the vehicle travels from the starting position of the trip to the end position of the trip. The speed segment is the interval range of the vehicle speed. The segmented driving length refers to the driving length when the vehicle travels at the speed in the speed division. Furthermore, the vehicle's drivable speed range can be divided into multiple speed segments in advance, so that the vehicle navigation estimates the segmented driving length corresponding to each speed segment in the total mileage according to the multiple pre-divided speed segments.

[0048] The battery parameter information includes but is not limited to: a charge state value, a first charge state threshold, a second charge state threshold, and a fully charged battery. Among them, the charge state value is the percentage of the remaining power of the power battery to the fully charged battery. The first charge state threshold is the critical value for starting the range extender. The first charge state threshold is an empirical value or a value obtained through experiments. The second charge state threshold is the minimum protection value of the power battery. The second charge state threshold is an empirical value or a value obtained through experiments. The first charge state threshold is greater than the second charge state threshold. The fully charged battery refers to the power of the power battery when it is fully charged.

[0049] In an embodiment of the present application, after obtaining the trip energy consumption information generated by the vehicle navigation and obtaining the battery parameter information of the vehicle, the mode requirement type is determined according to the trip energy consumption information and the battery parameter information.

[0050] like Figure 2 , which is a flow chart of the steps for determining the mode requirement type according to an embodiment of the present application.

[0051] Step S210, determining the available power according to the charge state value in the battery parameter information, the first charge state threshold value and the full charge state of the battery.

[0052] The available power refers to the power amount of the power battery that can be used before the power of the power battery drops to the first charge state threshold.

[0053] For example, the available power can be calculated using the following formula:

[0054] (SOC 导 -SOC 启 )×E; where SOC 导 SOC is the state of charge value; 启 is the first charge state threshold; E is the fully charged capacity of the battery.

[0055] Step S220, determining a protection power level according to the charge state value in the battery parameter information, a second charge state threshold, and the full charge level of the battery; wherein the first charge state threshold is greater than the second charge state threshold.

[0056] The protection power refers to the power of the power battery that can be used before the power of the power battery drops to the second charge state threshold.

[0057] For example, the available power can be calculated using the following formula:

[0058] (SOC 导 -SOC 低 )×E; where SOC 导 SOC is the state of charge value; 低is the second charge state threshold; E is the full charge of the battery.

[0059] Step S230: If both the available power and the conservation power are less than the trip power consumption in the trip energy consumption information, it is determined that the mode requirement type is an extended-range mode type.

[0060] The mode requirement type is the extended-range mode type, which means that the vehicle needs to start the range extender during this trip.

[0061] By comparing the available power and the trip power consumption as well as comparing the conservation power and the trip power consumption, it can be determined whether the vehicle needs to start the range extender in the future trip.

[0062] The mode requirement type includes: an extended-range mode type and other mode types. Wherein, if the mode requirement type is determined to be an extended-range mode type, the range extender is started. If the mode requirement type is determined to be other mode types, the range extender is not started.

[0063] For example, you can use the following steps to determine the model requirement type:

[0064] Comparison (SOC 导 -SOC 启 )×E and E 耗 ;

[0065] Comparison (SOC 导 -SOC 低 )×E and E 耗 ;

[0066] If (SOC 导 -SOC 启 )×EE 耗 ≥0, it means that the power of the power battery is sufficient to support the vehicle to the destination. In this case, the range extender does not need to be started;

[0067] If (SOC 导 -SOC 启 )×EE 耗 <0 and (SOC 导 -SOC 低 )×EE 耗 ≥0, it means that even if the range extender is not started, the vehicle can travel to the destination if the power of the power battery is not less than the second charge state threshold (minimum protection value). Therefore, in this case, the range extender may not be started;

[0068] If (SOC 导 -SOC 启 )×EE 耗 <0 and (SOC 导 -SOC低 )×EE 耗 <0, it means that the power consumption required for this trip is greater than the minimum protection value, so the vehicle must rely on the range extender to reach the destination. Therefore, the range extender needs to be started in this trip, and the mode requirement type is the range extender mode type.

[0069] In the embodiment of the present application, the range extender can be started when the mode requirement type is the extended-range mode type. Generally, the range extender is started when the charge state value of the power battery is less than the first charge state threshold. However, in the embodiment of the present application, as long as the available power and the protection power are less than the trip power consumption, the range extender can be started without waiting until the charge state value of the power battery drops to the first charge state threshold. Starting the range extender in advance can improve the power generation performance of the vehicle, ensure that each component is fully lubricated and the power generation system can work normally, so that the engine's power generation power is normal and the power generation time is sufficient, and avoid the situation where the fuel in the engine cylinder is not fully burned and consumed.

[0070] In the embodiment of the present application, when the vehicle is in a low temperature environment, the range extender can be started and operated at idle speed.

[0071] Specifically, when the range extender is started, the coolant temperature at the engine position of the range extender is detected; if the coolant temperature is greater than a preset temperature threshold, the range extender is started and the range extender is controlled to idle for a first idle time; otherwise, the range extender is started and the range extender is controlled to idle for a second idle time; wherein the second idle time is greater than the first idle time. In this way, the idle time can be extended when the temperature is low.

[0072] The temperature threshold is used to measure whether the temperature of the environment in which the vehicle is located is a low temperature environment. The temperature threshold is an empirical value or a value obtained through experiments. For example, the temperature threshold is set to 0°C.

[0073] The first idle time duration may be a fixed value.

[0074] The second idle time length may be a fixed value or a value determined according to the difference between the coolant temperature and the temperature threshold. Further, for each preset temperature value that the coolant temperature is lower than the temperature threshold, the second idle time length increases by a preset time length gradient; wherein the initial value of the idle time length may be a preset value or the first idle time length.

[0075] For example: Set the temperature threshold T0, when the range extender is started, the coolant temperature T 冷 When the range extender is started, the idle time after the range extender is started is the first idle time t0, such as: T0 = 0 ° C, t0 = 30s; when the coolant temperature T 冷When it is less than or equal to T0, increase the second idle time t 怠 For example, you can set the second idle time t to be 5°C lower for every 5°C lower coolant temperature. 怠 Add 5s and use the following formula to determine the second idle time:

[0076]

[0077] In the embodiment of the present application, after the range extender operates normally, the power generation power corresponding to the range extender is determined according to the trip energy consumption information and the battery parameter information.

[0078] Furthermore, after the range extender ends the idling operation, the range extender operates normally, that is, the range extender starts to generate electricity normally.

[0079] like Figure 3 , which is a flow chart of the steps for determining the generated power according to an embodiment of the present application.

[0080] Step S310, determining the trip power generation according to the segmented travel length corresponding to each vehicle speed segment in the trip energy information and the power generation power pre-set for each vehicle speed segment.

[0081] Specifically, the speed range of the vehicle is divided into a plurality of speed segments in advance, and a corresponding power generation capacity is set for each speed segment.

[0082] For example, as shown in Table 1, a vehicle speed segment is divided into every 20 km, and the power generation power P is set for each vehicle speed segment. V Among them, the power generation power P corresponding to each speed segment V The calibration method is: simulate WLTC (Worldwide Harmonized Light Vehicles Test Cycle) driving on a straight road, calculate the average power consumption of each speed segment, and then divide it by the power generation efficiency η of the range extender. η can be the average power generation efficiency of the range extender under WLTC conditions. For example, the average power consumption of the speed range of 40-60 is P 40-60 , then P3=P 40-60 / η.

[0083] Speed ​​range, kph 0-20 20-40 40-60 …… 100-120 120-140 <![CDATA[Power generation power P V , kW]]> P1 P2 P3 …… Pn-1 Pn

[0084] Table 1

[0085] After obtaining the trip energy information, the segmented driving length corresponding to each vehicle speed segment in the trip energy information is obtained; for each of the vehicle speed segments, the product of the segmented driving time corresponding to the vehicle speed segment and the power generation corresponding to the vehicle speed segment is determined as the segmented power generation corresponding to the vehicle speed segment; the sum of the segmented power generation corresponding to the multiple vehicle speed divisions is determined as the trip power generation.

[0086] Step S320, determining the available power according to the charge state value in the battery parameter information, the first charge state threshold value and the full charge of the battery.

[0087] Step S330: determining the extended-range power requirement according to the trip power consumption in the trip energy consumption information and the available power.

[0088] The power required for range extension is the amount of electricity required by the range extender.

[0089] The power required for extended range is the difference between the power consumption during the trip and the available power. For example, the power required for extended range E can be determined using the following formula: 增 :E 增 =E 耗 -(SOC 导 -SOC 启 )×E.

[0090] Step S340, determining whether the trip power generation is greater than or equal to the extended-range power requirement; if yes, executing step S350; if not, executing step S360.

[0091] Step S350: If the trip power generation is greater than or equal to the extended-range power requirement, the power generation corresponding to the speed segment to which the vehicle speed belongs is determined as the candidate power generation.

[0092] The vehicle speed is the vehicle speed monitored in real time during the vehicle's driving process.

[0093] When the trip power generation is greater than or equal to the extended-range power requirement, it means that the conventional power generation of the range extender can support the vehicle to reach the destination. Therefore, directly in the conventional way, during the vehicle driving process, the power generation corresponding to the speed segment to which the current vehicle speed of the vehicle belongs is determined as the candidate power generation power.

[0094] Step S360: If the trip power generation is less than the extended-range power requirement, determine the candidate power generation according to the power generation corresponding to the speed segment to which the vehicle speed belongs, the extended-range power requirement, the trip power generation and the full driving time in the trip energy consumption information.

[0095] The vehicle speed is the vehicle speed monitored in real time during the vehicle's driving process.

[0096] When the power generation during the trip is less than the power required for the extended range, it means that the range extender cannot support the vehicle to reach the destination in the conventional way, and the power generation power for the range extender needs to be re-planned.

[0097] When the power generation during the trip is less than the power required for the extended range, the candidate power generation power P can be determined using the following formula:

[0098]

[0099] Among them, P V E is the power generation corresponding to the speed segment to which the vehicle speed belongs; 增 E is the power required for range extension; V is the power generation during the trip; t 行 The total driving time.

[0100] Step S370: The minimum value between the determined candidate power generation power and the preset protection power is used as the power generation power corresponding to the range extender.

[0101] The protection power refers to the maximum power generation allowed by the range extender in a low temperature environment. Furthermore, the protection power is set by the car manufacturer based on the engine power allowed at different coolant temperatures. The candidate power generation and the protection power are compared to determine the minimum value, which is used as the power generation corresponding to the range extender. In this way, the power generation corresponding to the range extender is continuously determined according to the change in vehicle speed during the vehicle's driving process.

[0102] In the embodiment of the present application, after the power generation corresponding to the range extender is determined, the target speed and the target torque are determined according to the power generation.

[0103] Figure 4 The present invention is a flow chart of power generation control steps of a range extender according to an embodiment of the present application.

[0104] Step S410, detecting the coolant temperature at the engine position of the range extender.

[0105] The engine is a range extender engine.

[0106] Step S420, querying a preset target speed query table for a target speed corresponding to both the coolant temperature and the generated power.

[0107] The target speed query table is used to record at least the corresponding relationship among the coolant temperature, the power generation and the target speed. The speed query table may also include a target torque corresponding to the target speed.

[0108] The target speed refers to the speed that the engine of the range extender will use.

[0109] The target torque refers to the torque to be used by the engine of the range extender.

[0110] Step S430: determining a target torque according to the target speed.

[0111] When there is no target torque in the target speed query table, the target torque corresponding to the target speed can be determined using a preset conversion formula. For example: power generation torque = power generation power × 9550 ÷ target speed.

[0112] Step S440: controlling the engine of the range extender to operate according to the target speed and the target torque.

[0113] In the embodiment of the present application, relative to the normal temperature environment, in a low temperature environment, the torque output capacity of the engine at the same speed will be reduced. If the power generation speed and power generation torque are obtained in the original way to control the engine, it is easy to cause the engine to be unable to stably output the power generation torque. Therefore, the embodiment of the present application can correct the power generation speed and power generation torque corresponding to the power generation power in advance to solve this problem.

[0114] The power generation speed is the power corresponding to the power generation on the equal power optimal curve. The power generation torque is the power corresponding to the power generation on the equal power optimal curve. Furthermore, the range extender system efficiency diagram is an efficiency diagram used to describe the relationship between the power generation, speed and torque of the range extender. The equal power optimal curve is a curve in the range extender system efficiency diagram, and the power generation speed and power generation torque corresponding to the power generation on this curve are optimal.

[0115] like Figure 5 , which is a schematic diagram of the efficiency diagram of the range extender system according to an embodiment of the present application. Figure 5 The solid curve pointed by the middle arrow is the optimal curve of equal power.

[0116] In order to conveniently determine the power generation speed and power generation torque corresponding to the power generation, a power generation parameter query table can be formed based on the equal power optimal curve. The power generation parameter query table is shown in Table 2.

[0117] Power generation, P P1 P2 …… Pn Generator speed, n n1 n2 …… nn Generator torque, T P1*9550 / n1 P2*9550 / n2 …… Pn*9550 / nn

[0118] Table 2

[0119] In the original method, after determining the power generation corresponding to the range extender, the power generation speed and power generation torque corresponding to the power generation can be determined by querying the power generation parameter query table; and in the original method, the power generation speed and power generation torque corresponding to the power generation can be directly used to control the engine of the range extender. However, the original method is prone to engine instability. Therefore, the embodiment of the present application corrects the power generation speed and power generation torque corresponding to each power generation based on the power generation parameter query table, and then the target speed and target torque corresponding to each power generation can be obtained.

[0120] Specifically, the target speed is obtained by correcting the power generation speed in advance according to the coolant temperature and the power generation power. The target torque is obtained by correcting the power generation torque in advance according to the coolant temperature and the power generation power.

[0121] Furthermore, before querying the target speed corresponding to the coolant temperature and the power generation, the method further includes: in the vehicle testing phase, for each preset test power generation (the preset test power generation includes at least the power generation corresponding to each vehicle speed segment), executing the following steps: Figure 6 Correction steps shown.

[0122] Step S610: for each preset coolant temperature, controlling the test range extender to operate according to the power generation speed and power generation torque corresponding to the test power generation.

[0123] Step S620, detecting the real-time speed and real-time torque of the test range extender.

[0124] Step S630, determining whether the real-time rotational speed and the real-time torque are both normal; if yes, executing step S640; if not, executing step S660.

[0125] Step S640: If the real-time speed is normal and the real-time torque is normal, the real-time speed is determined as the target speed and the real-time torque is determined as the target torque.

[0126] The real-time speed is normal means that the real-time speed is within the preset first range of the current power generation speed. The midpoint of the first range is the current power generation speed. The first range is used to measure whether the real-time speed fluctuates around the current power generation speed. The size of the first range is an empirical value or a value obtained through experiments. Generally speaking, the first range is a smaller range.

[0127] The real-time torque is normal, which means that the real-time torque is within the preset second range of the current power generation torque. The midpoint of the second range is the current power generation torque. The second range is used to measure whether the real-time torque fluctuates around the current power generation torque. The size of the second range is an empirical value or a value obtained through experiments. Generally speaking, the second range is a smaller range.

[0128] If the real-time speed is normal and the real-time torque is normal, it means that the engine can run stably, the current power generation speed is the optimal speed, and the current power generation torque is the optimal torque.

[0129] Step S650, recording at least the coolant temperature, the test power generation, and the target speed into the target speed query table.

[0130] The target speed lookup table is as follows: Figure 3 shown.

[0131] Coolant temperature, power generation P1 P2 …… Pn T1 …… T2 …… …… … …… …… Tn

[0132] Table 3

[0133] After recording the coolant temperature, the test power generation, and the target speed in the target speed query table, read the next coolant file and continue to execute for the next coolant temperature. Figure 6 The steps are repeated until all the target speeds corresponding to the coolant temperatures under the current power generation are tested. For example: First, execute the test for the power generation P1 Figure 6 Steps in execution Figure 6 In the step, the generator speed and the generator torque are first corrected for the coolant temperature T1, and after the correction, the generator speed and the generator torque are corrected for the coolant temperature T2, and so on. After the generator speeds and the generator torques corresponding to all coolant temperatures are corrected, the generator power P2 is corrected. Figure 6 The steps are repeated, and so on, until all steps for the generated power are completed.

[0134] Step S660: If the real-time speed is abnormal or the real-time torque is abnormal, the power generation speed and the power generation torque are adjusted, and the test range extender is controlled to continue to operate according to the adjusted power generation speed and the power generation torque, and the process jumps to step S2 to continue detecting the real-time speed and the real-time torque of the test range extender; wherein the product of the adjusted power generation speed and the power generation torque is the same as that before the adjustment.

[0135] The real-time speed abnormality means that the real-time speed is not within the first range of the current power generation speed or the engine is abnormally flameout. In the process of adjusting the power generation speed, the abnormal engine flameout is generally caused by the inappropriate current power generation speed.

[0136] The real-time torque abnormality means that the real-time torque is not within the second range of the current power generation torque.

[0137] Adjusting the power generation speed and the power generation torque includes: increasing the power generation speed according to a preset adjustment step value; and determining the power generation torque according to the increased power generation speed. No matter how the power generation speed is adjusted, the product of the adjusted power generation speed and the adjusted power generation torque remains unchanged, that is, the power generation power remains unchanged.

[0138] In the embodiment of the present application, the method of starting the range extender when the battery's state of charge value is less than the state of charge threshold is not adopted. This is because in a low temperature environment, the performance related to power generation is relatively low, and there may be problems of low power generation or insufficient power generation time. The embodiment of the present application uses the ability of navigation to estimate the journey and the energy consumption of the journey to estimate whether the range extender needs to be started during the journey. If the range extender needs to be started, the range extender is started in advance. In this way, after running for a period of time, the performance related to power generation is alleviated, and power generation can be normal to provide energy for the vehicle to travel to the destination.

[0139] The present application also provides a power generation control device for a range extender. Figure 7 , which is a structural diagram of a power generation control device for a range extender according to an embodiment of the present application.

[0140] The power generation control device of the range extender comprises:

[0141] The acquisition module 710 is used to acquire the travel energy consumption information generated by the vehicle navigation and the battery parameter information of the vehicle after the preset vehicle navigation is started.

[0142] The determination module 720 is used to determine the mode requirement type according to the travel energy consumption information and the battery parameter information.

[0143] The starting module 730 is configured to start the range extender when it is determined that the mode requirement type is the extended-range mode type.

[0144] The control module 740 is used to determine the power generation corresponding to the range extender according to the trip energy consumption information and the battery parameter information, and to control the power generation of the range extender according to the power generation.

[0145] The functions of the device described in the embodiment of the present application have been described in the above method embodiment. Therefore, for any details not provided in the description of this embodiment, please refer to the relevant descriptions in the above embodiment and will not be repeated here.

[0146] The present application also provides a power generation control device for a range extender, such as Figure 8 , which is a structural diagram of a power generation control device of a range extender according to an embodiment of the present application.

[0147] The power generation control device of the range extender includes: a processor 810, a communication interface 820, a memory 830 and a communication bus 840. The processor 810, the communication interface 820 and the memory 830 communicate with each other through the communication bus 840.

[0148] The memory 830 is used to store computer programs.

[0149] In one embodiment of the present application, the processor 810 is used to execute the program stored in the memory 830 to implement the power generation control method of the range extender provided by any of the aforementioned method embodiments, including: after the preset vehicle navigation is started, obtaining the trip energy consumption information generated by the vehicle navigation and obtaining the battery parameter information of the vehicle; determining the mode requirement type according to the trip energy consumption information and the battery parameter information; when it is determined that the mode requirement type is the extended-range mode type, starting the range extender; determining the power generation power corresponding to the range extender according to the trip energy consumption information and the battery parameter information and controlling the power generation of the range extender according to the power generation power.

[0150] Among them, determining the mode requirement type according to the trip energy consumption information and the battery parameter information includes: determining the available power according to the charge state value, the first charge state threshold and the full charge of the battery in the battery parameter information; determining the protection power according to the charge state value, the second charge state threshold and the full charge of the battery in the battery parameter information; wherein the first charge state threshold is greater than the second charge state threshold; if the available power and the protection power are both less than the trip power consumption in the trip energy consumption information, then determining that the mode requirement type is an extended-range mode type.

[0151] Wherein, starting the range extender includes: detecting the coolant temperature at the engine position of the range extender; if the coolant temperature is greater than a preset temperature threshold, starting the range extender and controlling the range extender to idle for a first idle time; otherwise, starting the range extender and controlling the range extender to idle for a second idle time; wherein the second idle time is greater than the first idle time.

[0152] Among them, the determining the power generation corresponding to the range extender according to the trip energy consumption information and the battery parameter information includes: determining the trip power generation according to the segmented driving length corresponding to each speed segment in the trip energy information and the power generation pre-set for each speed segment; determining the available power according to the charge state value, the first charge state threshold and the full charge of the battery in the battery parameter information; determining the extended-range power requirement according to the trip power consumption and the available power in the trip energy consumption information; if the trip power generation is greater than or equal to the extended-range power requirement, determining the power generation corresponding to the speed segment to which the vehicle speed belongs as the candidate power generation; otherwise, determining the candidate power generation according to the power generation corresponding to the speed segment to which the vehicle speed belongs, the extended-range power requirement, the trip power generation and the full-trip driving time in the trip energy consumption information; and taking the minimum value between the determined candidate power generation and the preset protection power as the power generation corresponding to the range extender.

[0153] Among them, the trip power generation is determined according to the segmented driving length corresponding to each vehicle speed segment in the trip energy information and the power generation power pre-set for each vehicle speed segment, including: for each vehicle speed segment, the product of the segmented driving time corresponding to the vehicle speed segment and the power generation power corresponding to the vehicle speed segment is determined as the segmented power generation corresponding to the vehicle speed segment; the sum of the segmented power generation corresponding to multiple vehicle speed divisions is determined as the trip power generation.

[0154] The controlling of power generation of the range extender according to the power generation comprises: when starting the range extender, detecting the coolant temperature at the engine position of the range extender; querying a preset target speed query table for a target speed corresponding to the coolant temperature and the power generation; determining a target torque according to the target speed; and controlling the engine of the range extender to operate according to the target speed and the target torque.

[0155] Wherein, before the querying of the target speed corresponding to the coolant temperature and the generated power, it also includes: in the vehicle testing phase, performing the following operations for each preset test generated power: for each preset coolant temperature, controlling the test range extender to operate according to the generated speed and generated torque corresponding to the generated power; detecting the real-time speed and real-time torque of the test range extender; if the real-time speed is normal and the real-time torque is normal, determining the real-time speed as the target speed, and determining the real-time torque as the target torque; recording at least the coolant temperature, the test generated power, and the target speed in the speed query table; if the real-time speed is abnormal or the real-time torque is abnormal, adjusting the generated speed and the generated torque, controlling the test range extender to continue to operate according to the adjusted generated speed and generated torque, and continuing to detect the real-time speed and real-time torque of the test range extender; wherein the product of the adjusted generated speed and the generated torque is the same as that before the adjustment.

[0156] The embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the power generation control method of the range extender provided in any of the above method embodiments are implemented. Since the power generation control method of the range extender has been described in detail above, for the details not fully described in the description of this embodiment, please refer to the relevant descriptions in the above embodiments, and no further description will be given here.

[0157] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0158] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for 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 some parts of the embodiments.

[0159] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0160] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A power generation control method for a range extender, characterized in that: include: After the preset vehicle navigation is started, obtaining the travel energy consumption information generated by the vehicle navigation and obtaining the battery parameter information of the vehicle; Determining a mode requirement type according to the trip energy consumption information and the battery parameter information; When determining that the mode requirement type is an extended-range mode type, starting the range extender; According to the travel energy consumption information and the battery parameter information, the power generation power corresponding to the range extender is determined, and the power generation of the range extender is controlled according to the power generation power.

2. The method according to claim 1, characterized in that The determining the mode requirement type according to the trip energy consumption information and the battery parameter information includes: Determine the available power according to the charge state value, the first charge state threshold value and the full charge of the battery in the battery parameter information; Determine the protection power according to the charge state value, the second charge state threshold and the full charge of the battery in the battery parameter information; wherein the first charge state threshold is greater than the second charge state threshold; If both the available power and the conservation power are less than the trip power consumption in the trip energy consumption information, it is determined that the mode requirement type is an extended-range mode type.

3. The method according to claim 1, characterized in that: The starting range extender comprises: detecting a coolant temperature at an engine position of the range extender; If the coolant temperature is greater than a preset temperature threshold, the range extender is started and the range extender is controlled to idle for a first idle time; otherwise, the range extender is started and the range extender is controlled to idle for a second idle time; wherein the second idle time is greater than the first idle time.

4. The method according to claim 1, characterized in that: The determining, according to the trip energy consumption information and the battery parameter information, the power generation power corresponding to the range extender comprises: Determine the trip power generation according to the segmented travel length corresponding to each vehicle speed segment in the trip energy information and the power generation power pre-set for each vehicle speed segment; Determine the available power according to the charge state value, the first charge state threshold value and the full charge of the battery in the battery parameter information; Determining the required power for extended range according to the trip power consumption in the trip energy consumption information and the available power; If the trip power generation is greater than or equal to the extended-range power requirement, the power generation corresponding to the speed segment to which the vehicle speed belongs is determined as the candidate power generation; otherwise, the candidate power generation is determined based on the power generation corresponding to the speed segment to which the vehicle speed belongs, the extended-range power requirement, the trip power generation and the full-trip driving time in the trip energy consumption information; The minimum value between the determined candidate power generation power and the preset protection power is used as the power generation power corresponding to the range extender.

5. The method according to claim 4, characterized in that The determining of the trip power generation according to the segmented travel length corresponding to each vehicle speed segment in the trip energy information and the power generation power pre-set for each vehicle speed segment includes: For each of the vehicle speed segments, the product of the segmented driving time corresponding to the vehicle speed segment and the generated power corresponding to the vehicle speed segment is determined as the segmented power generation corresponding to the vehicle speed segment; The sum of the segmented power generation amounts corresponding to the plurality of vehicle speed divisions is determined as the trip power generation amount.

6. The method according to claim 1, characterized in that The controlling the range extender to generate electricity according to the generated power comprises: When starting the range extender, detecting a coolant temperature at an engine position of the range extender; In a preset target speed query table, query the target speed corresponding to the coolant temperature and the generated power; determining a target torque according to the target speed; The engine of the range extender is controlled to operate according to the target speed and the target torque.

7. The method according to claim 6, characterized in that Before querying the target speed corresponding to the coolant temperature and the generated power, the method further includes: During the vehicle testing phase, the following operations are performed for each preset test power generation: For each preset coolant temperature, controlling the test range extender to operate according to the power generation speed and power generation torque corresponding to the power generation power; Detecting the real-time speed and real-time torque of the test range extender; If the real-time speed is normal and the real-time torque is normal, the real-time speed is determined as the target speed, and the real-time torque is determined as the target torque; at least the coolant temperature, the test power generation, and the target speed are recorded in the speed query table; If the real-time speed is abnormal or the real-time torque is abnormal, the power generation speed and the power generation torque are adjusted, the test range extender is controlled to continue to operate according to the adjusted power generation speed and the power generation torque, and the real-time speed and the real-time torque of the test range extender are continuously detected; wherein the product of the adjusted power generation speed and the power generation torque is the same as that before the adjustment.

8. A power generation control device for a range extender, characterized in that: include: An acquisition module, used for acquiring the trip energy consumption information generated by the vehicle navigation and acquiring the battery parameter information of the vehicle after the preset vehicle navigation is started; A determination module, used to determine a mode requirement type according to the trip energy consumption information and the battery parameter information; A starting module, configured to start the range extender when determining that the mode requirement type is an extended range mode type; A control module is used to determine the power generation corresponding to the range extender according to the travel energy consumption information and the battery parameter information, and to control the power generation of the range extender according to the power generation.

9. A power generation control device for a range extender, characterized in that: include: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; At least one memory connected to the at least one bus, wherein the processor is configured to: execute a power generation control program of the range extender stored in the memory to implement the power generation control method of the range extender according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed to implement the power generation control method of the range extender according to any one of claims 1 to 7.

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