Starting control method, system and device for range extender of range-extended electric vehicle and medium

Abstract

The invention discloses a starting control method, system and device for a range extender of a range-extended electric vehicle and a medium. The method comprises the steps that the electric quantity of a power battery and a preset starting electric quantity threshold value are obtained; when the electric quantity of the power battery is smaller than or equal to the starting electric quantity threshold value, a corresponding DC-DC output limiting strategy is determined according to the electric quantity of the power battery, and DC power utilization limiting is conducted on the vehicle according to the DC-DC output limiting strategy to obtain DC-DC optimized output power; determining target starting power according to the current working condition of the range extender and a pre-constructed starting power correction table of the range extender; and obtaining the currently allowed maximum discharge power of the power battery, performing power optimization control on the thermal management accessory according to the DC-DC optimization output power, the target starting power and the maximum discharge power, and starting the range extender according to the target starting power. The range extender can be safely started in the low-electric-quantity state of the power battery, the endurance performance and battery safety of the vehicle are guaranteed, and the method can be applied to the technical field of vehicle control.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a method, system, device and medium for controlling the startup of a range extender of an extended-range electric vehicle. Background Art

[0002] An extended-range electric vehicle (REEV), also known as an extended-range hybrid or extended-range new energy vehicle, refers to a vehicle that can achieve all its power performance in pure electric mode. When the on-board rechargeable battery cannot meet the driving range requirements, the on-board auxiliary power generation device is turned on to provide electricity to the power system to extend the driving range. It is a series plug-in hybrid vehicle.

[0003] Extended-range electric vehicles can start the range extender when the power battery energy is low to maintain vehicle driving and charge the battery. Starting the range extender requires the power battery to provide a certain starting power. Usually, the range extender starting power is set as: range extender starting power = battery allowable peak discharge power - DC-DC output power - thermal management accessory power consumption.

[0004] However, when the power battery is in a low-power state, its allowable discharge power is lower than the peak discharge power. Therefore, if the DC-DC output power and the power consumption of the thermal management accessories are not optimized when starting the range extender, the range extender may fail to start or the range extender may exceed the allowable power of the power battery when starting, affecting the vehicle's endurance performance and battery safety. Summary of the Invention

[0005] The purpose of the present invention is to solve one of the technical problems existing in the prior art to at least a certain extent.

[0006] To this end, an object of an embodiment of the present invention is to provide a method for controlling the start-up of a range extender of an extended-range electric vehicle, which can safely start the range extender when the power battery is in a low-power state, thereby ensuring the vehicle's endurance performance and battery safety.

[0007] Another object of an embodiment of the present invention is to provide a start-up control system for a range extender of an extended-range electric vehicle.

[0008] In order to achieve the above technical objectives, the technical solutions adopted by the embodiments of the present invention include:

[0009] In a first aspect, an embodiment of the present invention provides a method for controlling the start-up of a range extender of an extended-range electric vehicle, comprising the following steps:

[0010] Obtaining the power battery charge and a preset starting power threshold for starting the range extender, and determining whether the power battery charge is less than or equal to the starting power threshold;

[0011] When the power battery power level is less than or equal to the starting power threshold, determining a corresponding DC-DC output limitation strategy according to the power battery power level, and limiting DC power consumption of the vehicle according to the DC-DC output limitation strategy to obtain a DC-DC optimized output power;

[0012] Obtaining a current range extender operating condition, and determining a target starting power according to the current range extender operating condition and a pre-built range extender starting power correction table;

[0013] The maximum discharge power currently allowed by the power battery is obtained, and power optimization control of the thermal management accessories is performed according to the DC-DC optimized output power, the target starting power, and the maximum discharge power, and then the range extender is started according to the target starting power.

[0014] Furthermore, in one embodiment of the present invention, the determining of the corresponding DC-DC output limiting strategy according to the power level of the power battery specifically includes:

[0015] When the power battery power level is greater than or equal to a preset second power level threshold, determining that the DC-DC output limiting strategy is low-power operation of comfort / entertainment electrical equipment;

[0016] When the power battery power level is less than the second power threshold and greater than or equal to a preset first power threshold, determining that the DC-DC output limitation strategy is to disable comfort / entertainment electrical equipment;

[0017] When the power battery power is less than the first power threshold, determining that the DC-DC output limiting strategy is a low-power operation controller / safety electrical equipment;

[0018] The first power threshold is smaller than the second power threshold, and the second power threshold is smaller than the startup power threshold.

[0019] Furthermore, in one embodiment of the present invention, limiting DC power consumption of the vehicle according to the DC-DC output limiting strategy to obtain the DC-DC optimized output power specifically includes:

[0020] When the DC-DC output limiting strategy is to operate the comfort / entertainment electrical devices at low power, the car audio and video equipment, window lifts, electric seat adjustment function, electric sunroof, electric rearview mirrors and welcome light system are switched to low power / sleep mode;

[0021] When the DC-DC output limitation strategy is to disable comfort / entertainment electrical devices, the car audio and video equipment, the window glass lifter, the electric seat adjustment function, the electric sunroof, the electric rearview mirror and the welcome light system are turned off;

[0022] When the DC-DC output limiting strategy is to operate the controller / safety electrical equipment at low power, the car audio and video equipment, window lifts, electric seat adjustment function, electric sunroof, electric rearview mirrors, and welcome light system are turned off, and the wipers and lighting system are determined to be activated based on the current driving environment, and other controllers / safety electrical equipment are switched to low power mode;

[0023] The total power of the DC power-consuming equipment after the DC power consumption of the vehicle is restricted is counted to obtain the DC-DC optimized output power.

[0024] Furthermore, in one embodiment of the present invention, the obtaining of the current range extender operating condition and determining the target starting power according to the current range extender operating condition and a pre-built range extender starting power correction table specifically include:

[0025] Get the current oil temperature, current oil pressure and range extender aging coefficient;

[0026] According to the current oil temperature and the current oil pressure, the corresponding corrected starting power is obtained by matching the range extender starting power correction table;

[0027] The target starting power is determined according to a product of the corrected starting power and the range extender aging coefficient.

[0028] Furthermore, in one embodiment of the present invention, the power optimization control of the thermal management accessory according to the DC-DC optimized output power, the target starting power, and the maximum discharge power specifically includes:

[0029] Determining the thermal management accessory allowable power according to the DC-DC optimized output power, the target starting power, and the maximum discharge power;

[0030] Determine compressor power requirements and heater power requirements based on current vehicle operating conditions;

[0031] When the power allowed by the thermal management accessory can meet the power requirements of the compressor and the heater, controlling the compressor and the heater to operate normally;

[0032] When the power allowed by the thermal management accessory cannot meet the power requirements of the compressor and the heater, and the vehicle is in a driving state, controlling the compressor and the heater to operate at low power;

[0033] When the power allowed by the thermal management accessory cannot meet the compressor power requirement and the heater power requirement, and the vehicle is in a stopped state, the compressor and the heater are controlled to stop running.

[0034] Furthermore, in one embodiment of the present invention, the range extender start control method of the extended-range electric vehicle further includes the following steps:

[0035] When the power level of the power battery is restored to be greater than the starting power threshold, the DC power usage restriction of the vehicle is released, and the thermal management accessories are controlled to operate normally according to real-time demand.

[0036] In a second aspect, an embodiment of the present invention provides a range extender start control system for an extended-range electric vehicle, comprising:

[0037] A power monitoring module is used to obtain the power battery power and a preset starting power threshold for starting the range extender, and to determine whether the power battery power is less than or equal to the starting power threshold;

[0038] a DC power consumption limiting module, configured to determine a corresponding DC-DC output limiting strategy according to the power battery power level when the power battery power level is less than or equal to the starting power level threshold, and to limit the DC power consumption of the vehicle according to the DC-DC output limiting strategy to obtain a DC-DC optimized output power;

[0039] a starting power determination module, configured to obtain a current range extender operating condition and determine a target starting power according to the current range extender operating condition and a pre-built range extender starting power correction table;

[0040] The thermal management accessory optimization module is used to obtain the maximum discharge power currently allowed by the power battery, perform power optimization control on the thermal management accessory according to the DC-DC optimized output power, the target starting power and the maximum discharge power, and then start the range extender according to the target starting power.

[0041] Furthermore, in one embodiment of the present invention, the startup power determination module includes:

[0042] Range extender operating condition acquisition unit, used to obtain current oil temperature, current oil pressure and range extender aging coefficient;

[0043] A starting power matching unit, configured to obtain a corresponding corrected starting power by matching the range extender starting power correction table according to the current engine oil temperature and the current engine oil pressure;

[0044] The target starting power determining unit is configured to determine the target starting power according to the product of the corrected starting power and the range extender aging coefficient.

[0045] In a third aspect, an embodiment of the present invention provides a range extender start control device for an extended-range electric vehicle, comprising:

[0046] at least one processor;

[0047] at least one memory for storing at least one program;

[0048] When the at least one program is executed by the at least one processor, the at least one processor implements the above-mentioned method for controlling the start-up of a range extender of an extended-range electric vehicle.

[0049] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium storing a program executable by a processor, wherein the program executable by the processor is used to execute the above-mentioned method for starting a range extender of an extended-range electric vehicle when executed by the processor.

[0050] The advantages and benefits of the present invention will be described in part in the following description and will become apparent from the following description or learned through practice of the present invention:

[0051] An embodiment of the present invention obtains the power level of a power battery and a preset starting power threshold for starting a range extender, and determines whether the power level of the power battery is less than or equal to the starting power threshold. When the power level of the power battery is less than or equal to the starting power threshold, a corresponding DC-DC output restriction strategy is determined according to the power level of the power battery, and DC power consumption of the vehicle is restricted according to the DC-DC output restriction strategy to obtain a DC-DC optimized output power, obtain the current operating condition of the range extender, determine the target starting power according to the current operating condition of the range extender and a pre-built range extender starting power correction table, obtain the current maximum discharge power allowed by the power battery, perform power optimization control on the thermal management accessories according to the DC-DC optimized output power, the target starting power and the maximum discharge power, and then start the range extender according to the target starting power. In an embodiment of the present invention, when the power level of the power battery is lower than the starting power threshold for starting the range extender, a corresponding DC-DC output limitation strategy is determined according to the power level of the power battery to limit the DC power consumption of the vehicle, a target starting power is determined according to the current operating condition of the range extender and a starting power correction table of the range extender, and power optimization control is performed on the thermal management accessories according to the DC-DC optimized output power after the DC power consumption limitation, the target starting power, and the maximum discharge power currently allowed by the power battery, so that the power battery can provide starting power for the range extender within the allowable power range, thereby being able to safely start the range extender when the power battery is in a low power state, thereby ensuring the vehicle's endurance performance and battery safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following introduction is made to the drawings required for use in the embodiments of the present invention. It should be understood that the drawings introduced below are only for the convenience of clearly describing some embodiments of the technical solutions of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative work.

[0053] Figure 1 A flowchart of a method for controlling the start-up of a range extender of an extended-range electric vehicle provided by an embodiment of the present invention;

[0054] Figure 2 A structural block diagram of a range extender start-up control system for an extended-range electric vehicle provided by an embodiment of the present invention;

[0055] Figure 3 This is a structural block diagram of a range extender start-up control device for an extended-range electric vehicle provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0056] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and are not to be construed as limiting the present invention. The step numbers in the following embodiments are provided for ease of explanation only and do not limit the order of the steps. The order of execution of the steps in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0057] In the description of the present invention, "a plurality" means two or more. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly indicating the number of the indicated technical features, or as implicitly indicating the order of the indicated technical features. Furthermore, unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art.

[0058] Reference Figure 1 The embodiment of the present invention provides a method for starting a range extender of an extended-range electric vehicle, which specifically includes the following steps:

[0059] S101, obtaining the power battery power and a preset starting power threshold for starting the range extender, and determining whether the power battery power is less than or equal to the starting power threshold;

[0060] S102: When the power battery charge is less than or equal to the starting power threshold, determine a corresponding DC-DC output limiting strategy based on the power battery charge, and limit DC power consumption of the vehicle based on the DC-DC output limiting strategy to obtain an optimized DC-DC output power;

[0061] S103: Obtain the current range extender operating condition, and determine the target starting power according to the current range extender operating condition and a pre-built range extender starting power correction table;

[0062] S104: Obtain the maximum discharge power currently allowed by the power battery, perform power optimization control on the thermal management accessories according to the DC-DC optimized output power, the target starting power, and the maximum discharge power, and then start the range extender according to the target starting power.

[0063] In an embodiment of the present invention, when the power level of the power battery is lower than the starting power threshold for starting the range extender, a corresponding DC-DC output limitation strategy is determined according to the power level of the power battery to limit the DC power consumption of the vehicle, a target starting power is determined according to the current operating condition of the range extender and a starting power correction table of the range extender, and power optimization control is performed on the thermal management accessories according to the DC-DC optimized output power after the DC power consumption limitation, the target starting power, and the maximum discharge power currently allowed by the power battery, so that the power battery can provide starting power for the range extender within the allowable power range, thereby being able to safely start the range extender when the power battery is in a low power state, thereby ensuring the vehicle's endurance performance and battery safety.

[0064] As an optional implementation, a corresponding DC-DC output limiting strategy is determined according to the power level of the power battery, which specifically includes:

[0065] S1021: When the power battery power level is greater than or equal to a preset second power level threshold, determine that the DC-DC output limiting strategy is to operate the comfort / entertainment electrical equipment at low power;

[0066] S1022: When the power battery power level is less than a second power threshold and greater than or equal to a preset first power threshold, determine that the DC-DC output limitation strategy is to disable comfort / entertainment electrical equipment;

[0067] S1023: When the power battery power is less than the first power threshold, determine the DC-DC output limiting strategy as low power operation controller / safety electrical equipment;

[0068] The first power threshold is smaller than the second power threshold, and the second power threshold is smaller than the start-up power threshold.

[0069] Specifically, the vehicle's DC power consumers are pre-classified, including controller / safety power consumers (starting system, ignition system, lighting system, signal devices, instruments, and alarm devices) and comfort / entertainment power consumers (car audio and video equipment, window lifts, power seat adjustment function, power sunroof, power mirrors, and welcome lighting system). A second power threshold (e.g., 20%) and a first power threshold (e.g., 10%) are pre-set to distinguish different DC-DC output limit strategies. When it is determined that the range extender needs to be started, if the power battery power level is not less than the second power threshold, the comfort / entertainment power consumers need to be limited to low power operation to provide the power required for safe start of the range extender. If the power battery power level is less than the second power threshold but not less than the first power threshold, the comfort / entertainment power consumers need to be disabled to provide the power required for safe start of the range extender. If the power battery power level is less than the first power threshold, in addition to disabling the comfort / entertainment power consumers, the controller / safety power consumers also need to be operated at low power.

[0070] As a further optional implementation, the DC power consumption of the vehicle is limited according to the DC-DC output limitation strategy to obtain the DC-DC optimized output power, which specifically includes:

[0071] S1024: When the DC-DC output limiting strategy is to operate comfort / entertainment electrical devices at low power, the car audio and video equipment, window lifts, electric seat adjustment function, electric sunroof, electric rearview mirrors, and welcome light systems are switched to low power / sleep mode;

[0072] S1025: When the DC-DC output restriction strategy is to disable comfort / entertainment electrical devices, the car audio and video equipment, window lifts, electric seat adjustment function, electric sunroof, electric rearview mirrors, and the welcome light system are turned off;

[0073] S1026: When the DC-DC output limiting strategy is to operate the controller / safety electrical equipment at low power, the car audio and video equipment, window lifts, power seat adjustment function, power sunroof, power mirrors, and welcome lighting system are turned off. The wipers and lighting system are activated based on the current driving environment. Other controllers / safety electrical equipment are switched to low power mode.

[0074] S1027: Count the total power of the DC power-consuming devices after the DC power consumption of the vehicle is restricted to obtain the DC-DC optimized output power.

[0075] Specifically, when the DC-DC output limiting strategy is to operate comfort / entertainment electrical devices at low power, the car audio and video equipment, window lifts, electric seat adjustment function, electric sunroof, electric rearview mirrors, and the welcome light system are switched to low power / sleep mode. Specifically, the selection of low power mode and sleep mode needs to be determined based on the real-time usage of the electrical devices. For example, when the user is using the car audio and video equipment, the car audio and video equipment is switched to low power mode, while electrical devices that the user is not currently using are switched to sleep mode until the user actively wakes them up. When the DC-DC output limiting strategy is to disable comfort / entertainment electrical devices, the car audio and video equipment, window lifts, electric seat adjustment function, electric sunroof, electric rearview mirrors, and the welcome light system are turned off.

[0076] When the DC-DC output limitation strategy is to operate controllers / safety-use electrical devices at low power, the rain sensor identifies the current rainfall to determine whether to activate the wipers. The ambient light sensor identifies the current lighting conditions to determine whether to activate the lighting system. The power battery ensures low power operation for controllers / safety-use electrical devices such as the starting system, ignition system, lighting system, signaling devices, instruments, and alarms. The total power consumption of the vehicle's DC-use-limited DC-use devices is calculated to determine the optimized DC-DC output power. This optimized DC-DC output power is the DC-DC output power that the power battery needs to provide when the range extender is activated.

[0077] As an optional implementation, the current range extender operating condition is obtained, and the target starting power is determined according to the current range extender operating condition and a pre-built range extender starting power correction table, which specifically includes:

[0078] S1031. Obtain the current engine oil temperature, current engine oil pressure, and range extender aging coefficient;

[0079] S1032. Obtain corresponding corrected starting power by matching the current engine oil temperature and the current engine oil pressure in the range extender starting power correction table;

[0080] S1033: Determine the target starting power according to the product of the corrected starting power and the range extender aging coefficient.

[0081] Specifically, the required power for starting the range extender under different oil temperatures and different oil pressures is pre-calibrated through experiments to obtain a range extender starting power correction table, as shown in Table 1 below.

[0082] Table 1

[0083]

[0084] Based on the range extender starting power table correction table query to obtain the current oil temperature T xand the current oil pressure P y Corresponding corrected starting power Power xy After that, according to the corrected startup power xy The target starting power is determined by multiplying the target starting power by the product of the range extender aging coefficient η, that is, target starting power = Power xy *η.

[0085] As a further optional implementation, power optimization control of the thermal management accessory is performed based on the DC-DC optimized output power, the target startup power, and the maximum discharge power, which specifically includes:

[0086] S1041. Determine the allowable power of the thermal management accessory based on the DC-DC optimized output power, the target startup power, and the maximum discharge power;

[0087] S1042. Determine the compressor power requirement and the heater power requirement according to the current vehicle operating condition;

[0088] S1043: When the power allowed by the thermal management accessory can meet the power requirements of the compressor and the heater, control the compressor and the heater to operate normally;

[0089] S1044: When the power allowed by the thermal management accessory cannot meet the power requirements of the compressor and the heater, and the vehicle is in motion, control the compressor and the heater to operate at low power;

[0090] S1045: When the power allowed by the thermal management accessory cannot meet the power requirements of the compressor and the heater, and the vehicle is in a stopped state, control the compressor and the heater to stop running.

[0091] Specifically, the thermal management accessory allowable power is the power that the power battery can provide to the thermal management accessory in addition to providing the DC-DC optimized output power and the target starting power, that is, the thermal management accessory allowable power = the power battery's current maximum discharge power - the DC-DC optimized output power - the target starting power; the compressor (ECOMP) power requirement and the heater (PTC) power requirement are determined based on the current vehicle operating condition. For example, whether there is a defrosting or defogger requirement and the corresponding power requirements are determined based on the current vehicle operating condition; when the thermal management accessory allowable power can meet the current compressor power requirement and heater power requirement, the thermal management accessories such as the ECOMP and PTC are controlled to operate normally; when the thermal management accessory allowable power cannot meet the current compressor power requirement and heater power requirement and the vehicle is in a driving state, the thermal management accessories such as the ECOMP and PTC are controlled to operate at a low power, for example, by reducing performance for defrosting and defogger; when the thermal management accessory allowable power cannot meet the compressor power requirement and heater power requirement and the vehicle is in a stopped state, the thermal management accessories such as the ECOMP and PTC are controlled to stop operating to prioritize ensuring the starting power of the range extender.

[0092] As an optional embodiment, the range extender start control method of the extended-range electric vehicle further includes the following steps:

[0093] S105. When the power battery power recovers to a level greater than the starting power threshold, the DC power usage restriction of the vehicle is released, and the thermal management accessories are controlled to operate normally according to real-time demand.

[0094] Specifically, after the range extender is started, if the power provided by the range extender is greater than the power consumed by the vehicle operation, the range extender will charge the power battery. When the power level of the power battery recovers to a level greater than the starting power threshold, it indicates that the power level of the power battery has recovered to the level before starting the range extender and will continue to charge subsequently. At this time, the vehicle's DC power usage restriction can be lifted to ensure the vehicle's optimal performance and the user's comfortable experience. At the same time, the thermal management accessories are controlled to operate normally according to real-time vehicle and user needs.

[0095] The above describes the method steps of an embodiment of the present invention. It can be appreciated that, in an embodiment of the present invention, when the power battery charge is lower than the starting power threshold for starting the range extender, a corresponding DC-DC output limiting strategy is determined based on the power battery charge to limit the DC power consumption of the vehicle. The target starting power is determined based on the current range extender operating condition and the range extender starting power correction table. The thermal management accessories are then power optimized and controlled based on the DC-DC optimized output power after DC power consumption limitation, the target starting power, and the current maximum discharge power allowed by the power battery. This allows the power battery to provide starting power to the range extender within the allowable power range, thereby safely starting the range extender when the power battery charge is low, thereby ensuring the vehicle's endurance performance and battery safety.

[0096] Reference Figure 2 The embodiment of the present invention provides a range extender start control system for an extended-range electric vehicle, comprising:

[0097] The power monitoring module is used to obtain the power battery power and the preset starting power threshold for starting the range extender, and to determine whether the power battery power is less than or equal to the starting power threshold;

[0098] The DC power consumption limitation module is used to determine the corresponding DC-DC output limitation strategy according to the power battery power when the power battery power is less than or equal to the starting power threshold, and to limit the DC power consumption of the vehicle according to the DC-DC output limitation strategy to obtain the DC-DC optimized output power;

[0099] A starting power determination module is used to obtain the current range extender operating condition and determine the target starting power according to the current range extender operating condition and a pre-built range extender starting power correction table;

[0100] The thermal management accessory optimization module is used to obtain the maximum discharge power currently allowed by the power battery, perform power optimization control on the thermal management accessories based on the DC-DC optimized output power, target starting power and maximum discharge power, and then start the range extender according to the target starting power.

[0101] As an optional implementation, the startup power determination module includes:

[0102] Range extender operating condition acquisition unit, used to obtain current oil temperature, current oil pressure and range extender aging coefficient;

[0103] The starting power matching unit is used to match the current oil temperature and current oil pressure in the range extender starting power correction table to obtain the corresponding corrected starting power;

[0104] The target starting power determination unit is used to determine the target starting power according to the product of the corrected starting power and the range extender aging coefficient.

[0105] The contents of the above method embodiments are all applicable to the present system embodiments. The functions specifically implemented by the present system embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0106] Reference Figure 3 The embodiment of the present invention provides a range extender start control device for an extended-range electric vehicle, comprising:

[0107] at least one processor;

[0108] at least one memory for storing at least one program;

[0109] When the at least one program is executed by the at least one processor, the at least one processor implements the above-mentioned method for controlling the start-up of a range extender of an extended-range electric vehicle.

[0110] The contents of the above method embodiments are all applicable to the present device embodiments. The functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0111] An embodiment of the present invention further provides a computer-readable storage medium storing a program executable by a processor. When the program is executed by the processor, it is used to execute the above-mentioned method for controlling the start-up of a range extender of an extended-range electric vehicle.

[0112] A computer-readable storage medium according to an embodiment of the present invention can execute a method for starting and controlling a range extender of an extended-range electric vehicle provided by an embodiment of the present invention, can execute any combination of implementation steps of the embodiment of the method, and has the corresponding functions and beneficial effects of the method.

[0113] The embodiment of the present invention also discloses a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device can read the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs Figure 1 The method shown.

[0114] In some optional embodiments, the function / operation mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the function / operation involved, the two boxes shown in succession can actually be executed substantially simultaneously or the above-mentioned boxes can sometimes be executed in reverse order. In addition, the embodiment presented and described in the flow chart of the present invention is provided in an exemplary manner for the purpose of providing a more comprehensive understanding of the technology. The disclosed method is not limited to the operation and logic flow presented herein. Optional embodiments are contemplated in which the order of the various operations is changed and the sub-operations described as a part of a larger operation are performed independently.

[0115] In addition, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise stated, one or more of the above-mentioned functions and / or features can be integrated into a single physical device and / or software module, or one or more functions and / or features can be implemented in separate physical devices or software modules. It is also understood that a detailed discussion of the actual implementation of each module is not necessary for understanding the present invention. More specifically, given the properties, functions, and internal relationships of the various functional modules in the devices disclosed herein, the actual implementation of the module will be understood within the routine skills of an engineer. Therefore, a person skilled in the art can implement the present invention set forth in the claims using ordinary skills without undue experimentation. It is also understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present invention, which is determined by the full scope of the appended claims and their equivalents.

[0116] If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, 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. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the above methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program code.

[0117] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0118] More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic devices), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable media on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0119] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0120] In the above description of this specification, reference to the terms "one embodiment / example," "another embodiment / example," or "certain embodiments / examples" means 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 present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0121] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

[0122] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A method for controlling the start-up of a range extender of an extended-range electric vehicle, characterized in that: The following steps are involved: Obtaining the power battery charge and a preset starting power threshold for starting the range extender, and determining whether the power battery charge is less than or equal to the starting power threshold; When the power battery power level is less than or equal to the starting power threshold, determining a corresponding DC-DC output limitation strategy according to the power battery power level, and limiting DC power consumption of the vehicle according to the DC-DC output limitation strategy to obtain a DC-DC optimized output power; Obtaining a current range extender operating condition, and determining a target starting power according to the current range extender operating condition and a pre-built range extender starting power correction table; The maximum discharge power currently allowed by the power battery is obtained, and power optimization control of the thermal management accessories is performed according to the DC-DC optimized output power, the target starting power, and the maximum discharge power, and then the range extender is started according to the target starting power.

2. A range extender start-up control method for an extended-range electric vehicle according to claim 1, characterized in that: The step of determining a corresponding DC-DC output limiting strategy according to the power battery capacity specifically includes: When the power battery power level is greater than or equal to a preset second power level threshold, determining that the DC-DC output limiting strategy is low-power operation of comfort / entertainment electrical equipment; When the power battery power level is less than the second power threshold and greater than or equal to a preset first power threshold, determining that the DC-DC output limitation strategy is to disable comfort / entertainment electrical equipment; When the power battery power is less than the first power threshold, determining that the DC-DC output limiting strategy is a low-power operation controller / safety electrical equipment; The first power threshold is smaller than the second power threshold, and the second power threshold is smaller than the startup power threshold.

3. The method for starting a range extender of an extended-range electric vehicle according to claim 2, wherein: The step of limiting the DC power consumption of the vehicle according to the DC-DC output limiting strategy to obtain the DC-DC optimized output power specifically includes: When the DC-DC output limiting strategy is to operate the comfort / entertainment electrical devices at low power, the car audio and video equipment, window lifts, electric seat adjustment function, electric sunroof, electric rearview mirrors and welcome light system are switched to low power / sleep mode; When the DC-DC output limitation strategy is to disable comfort / entertainment electrical devices, the car audio and video equipment, the window glass lifter, the electric seat adjustment function, the electric sunroof, the electric rearview mirror and the welcome light system are turned off; When the DC-DC output limiting strategy is to operate the controller / safety electrical equipment at low power, the car audio and video equipment, window lifts, electric seat adjustment function, electric sunroof, electric rearview mirrors, and welcome light system are turned off, and the wipers and lighting system are determined to be activated based on the current driving environment, and other controllers / safety electrical equipment are switched to low power mode; The total power of the DC power-consuming equipment after the DC power consumption of the vehicle is restricted is counted to obtain the DC-DC optimized output power.

4. The method for starting a range extender of an extended-range electric vehicle according to claim 1, wherein: The obtaining of the current range extender operating condition and determining the target starting power according to the current range extender operating condition and a pre-built range extender starting power correction table specifically includes: Get the current oil temperature, current oil pressure and range extender aging coefficient; According to the current oil temperature and the current oil pressure, the corresponding corrected starting power is obtained by matching the range extender starting power correction table; The target starting power is determined according to a product of the corrected starting power and the range extender aging coefficient.

5. The method for starting a range extender of an extended-range electric vehicle according to claim 1, wherein: The power optimization control of the thermal management accessory according to the DC-DC optimized output power, the target starting power, and the maximum discharge power specifically includes: Determining the thermal management accessory allowable power according to the DC-DC optimized output power, the target starting power, and the maximum discharge power; Determine compressor power requirements and heater power requirements based on current vehicle operating conditions; When the power allowed by the thermal management accessory can meet the power requirements of the compressor and the heater, controlling the compressor and the heater to operate normally; When the power allowed by the thermal management accessory cannot meet the power requirements of the compressor and the heater, and the vehicle is in a driving state, controlling the compressor and the heater to operate at low power; When the power allowed by the thermal management accessory cannot meet the compressor power requirement and the heater power requirement, and the vehicle is in a stopped state, the compressor and the heater are controlled to stop running.

6. A method for controlling the start-up of a range extender of an extended-range electric vehicle according to any one of claims 1 to 5, characterized in that: The range extender start control method for an extended-range electric vehicle further comprises the following steps: When the power level of the power battery is restored to be greater than the starting power threshold, the DC power usage restriction of the vehicle is released, and the thermal management accessories are controlled to operate normally according to real-time demand.

7. A range extender start control system for an extended-range electric vehicle, characterized in that: include: A power monitoring module is used to obtain the power battery power and a preset starting power threshold for starting the range extender, and to determine whether the power battery power is less than or equal to the starting power threshold; a DC power consumption limiting module, configured to determine a corresponding DC-DC output limiting strategy according to the power battery power level when the power battery power level is less than or equal to the starting power level threshold, and to limit the DC power consumption of the vehicle according to the DC-DC output limiting strategy to obtain a DC-DC optimized output power; a starting power determination module, configured to obtain a current range extender operating condition and determine a target starting power according to the current range extender operating condition and a pre-built range extender starting power correction table; The thermal management accessory optimization module is used to obtain the maximum discharge power currently allowed by the power battery, perform power optimization control on the thermal management accessory according to the DC-DC optimized output power, the target starting power and the maximum discharge power, and then start the range extender according to the target starting power.

8. The range extender start control system of an extended-range electric vehicle according to claim 7, characterized in that: The starting power determination module includes: Range extender operating condition acquisition unit, used to obtain current oil temperature, current oil pressure and range extender aging coefficient; A starting power matching unit, configured to obtain a corresponding corrected starting power by matching the range extender starting power correction table according to the current engine oil temperature and the current engine oil pressure; The target starting power determining unit is configured to determine the target starting power according to the product of the corrected starting power and the range extender aging coefficient.

9. A range extender start control device for an extended-range electric vehicle, characterized in that: include: at least one processor; at least one memory for storing at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements a start-up control method for a range extender of an extended-range electric vehicle according to any one of claims 1 to 6.

10. A computer-readable storage medium storing a program executable by a processor, characterized in that: The program executable by the processor is used to execute a start-up control method for a range extender of an extended-range electric vehicle as claimed in any one of claims 1 to 6 when executed by the processor.

Images