Extended-range electric vehicle starting system and control method

Abstract

The invention discloses a starting system and a control method for a range-extended electric vehicle, comprising: a range-extender engine, an engine starter, a range-extender automatic clutch, a range-extender generator, a generator controller, a high-voltage power battery, a range-extender controller, a vehicle controller and a low-voltage starting power supply; the high-voltage power battery is connected to the generator controller and the range-extender generator through a high-voltage wiring harness; the engine starter, the range-extender engine, the range-extender automatic clutch and the range-extender generator are connected through mechanical transmission; the engine starter and the range-extender automatic clutch are connected to the low-voltage starting power supply through a wiring harness, and the working power is provided by the low-voltage starting power supply; the vehicle controller, the range-extender controller and the generator controller are connected through control signals, and the vehicle controller and the engine starter and the range-extender automatic clutch are connected through control signals; when the vehicle controller determines that the environment is low temperature, the vehicle controller controls the range-extender automatic clutch to separate, disconnects the connection between the range-extender engine and the range-extender generator, and the range-extender controller controls the engine starter to drive the range-extender engine to complete starting.

Description

Technical Field

[0001] The present application relates to the technical field of control of a vehicle starting process, and specifically to a starting system and control method for an extended-range electric vehicle. Background Art

[0002] In the field of vehicles, extended-range electric vehicles are a type of new energy electric vehicles. By adding a range extender to a pure electric vehicle, the range extender provides a certain amount of electricity to maintain the vehicle's continuous driving and extend the vehicle's mileage. There are currently many types of range extenders, such as a combination of an internal combustion engine and a generator, or an internal combustion engine and a low-power fuel cell, etc. The most commonly used solution for extended-range electric vehicles on the market is a range extender system composed of an internal combustion engine and a generator. The mature internal combustion engine used is convenient to replenish energy and can store more energy, thereby effectively supplementing the mileage anxiety caused by the current insufficient level of power battery technology. This type of range extender is generally connected to the input shaft of the generator by an efficient internal combustion engine through the output shaft. The generator generally uses a permanent magnet synchronous motor. When the range extender needs to be started, the generator system is first connected to the high-voltage circuit of the vehicle, and the generator is transformed into an electric motor to start the internal combustion engine quickly. After the internal combustion engine is started and can output power stably, the motor needs to be transformed into a generator under the control of the controller, and the internal combustion engine drives the generator to generate electricity for the vehicle.

[0003] However, the current internal combustion engine range extender system still has some problems, including: Since the generator included in the range extender can be used as an electric motor to start the internal combustion engine, in order to reduce weight and reduce costs, some accessories are reduced compared to the internal combustion engine of traditional cars. Moreover, the internal combustion engine is rigidly connected to the generator, and the internal combustion engine cannot be started independently. The internal combustion engine and the generator will rotate together. As a result, when the vehicle ambient temperature is very low, such as -20℃ in the north, when the vehicle is just started, the battery temperature is also -20℃. The discharge capacity of the power battery in a low temperature environment is limited and the power battery is prohibited from charging at sub-zero temperatures. The generator will consume a lot of power when driving the internal combustion engine to start. The instantaneous high power discharge will affect the battery life. Moreover, if the internal combustion engine is started, it will drive the generator to generate electricity, otherwise it may cause a safety accident; if it does not generate electricity, the generator will have a back electromotive force, which will cause damage to the engine controller. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the embodiments of the present application provide a starting system and a control method for an extended-range electric vehicle, which enable the range extender to be reliably started even when the charging and discharging capacity of the power battery is insufficient.

[0005] An embodiment of the present invention provides a range-extended electric vehicle starting system, comprising:

[0006] Range extender engine, engine starter, range extender automatic clutch, range extender generator, generator controller, high-voltage power battery, range extender controller, vehicle controller and low-voltage starting power supply;

[0007] The high-voltage power battery is connected to the generator controller and the range extender generator through a high-voltage wiring harness; the engine starter, the range extender engine, the range extender automatic clutch and the range extender generator are connected through mechanical transmission; the engine starter and the range extender automatic clutch are connected to the low-voltage starting power supply through a wiring harness, and the low-voltage starting power supply provides working power; the vehicle controller, the range extender controller and the generator controller are connected through control signals, and the vehicle controller and the engine starter and the range extender automatic clutch are connected through control signals;

[0008] Among them, when the vehicle controller determines that the environment is low temperature, the vehicle controller controls the range extender automatic clutch to disengage, disconnects the connection between the range extender engine and the range extender generator, and the range extender controller controls the engine starter to drive the range extender engine to complete starting.

[0009] According to the extended-range electric vehicle starting system provided by the embodiment of the present invention, the extended-range electric vehicle low-temperature starting system further includes: a range extender relay, a range extender pre-charge relay and a range extender pre-charge resistor;

[0010] The range extender pre-charging relay and the range extender pre-charging resistor are connected in series and in parallel with the range extender relay, and the high-voltage power battery is connected to the range extender pre-charging relay, the range extender pre-charging resistor, the range extender relay and the range extender generator through a high-voltage line.

[0011] According to the extended-range electric vehicle starting system provided in an embodiment of the present invention, the vehicle controller controls the start-up of the range extender generator and controls the closing of the range extender pre-charging relay. After the pre-charging of the range extender pre-charging relay is completed, the range extender relay is closed and the range extender generator is powered on and started.

[0012] According to the extended-range electric vehicle starting system provided by an embodiment of the present invention, when the vehicle controller determines that the environment is not low temperature, the vehicle controller sends an instruction to the range extender controller, and the range extender controller controls the range extender generator to start the range extender engine.

[0013] According to the extended-range electric vehicle starting system provided by an embodiment of the present invention, when the vehicle controller determines that the environment is low temperature, the vehicle controller limits the vehicle power to be less than or equal to the power provided by the range extender engine.

[0014] According to the extended-range electric vehicle starting system provided by an embodiment of the present invention, when the vehicle controller determines that the environment is low temperature, the vehicle controller determines whether the high-voltage power battery is allowed to be charged, and limits or prohibits energy recovery.

[0015] The embodiment of the present invention further provides a control method of the extended-range electric vehicle starting system based on the above embodiment, comprising:

[0016] The vehicle controller determines whether the range extender needs to be started;

[0017] The vehicle controller determines whether the current ambient temperature is a preset low temperature environment;

[0018] If the current environment is a non-low temperature environment, the range extender executes a first range extender startup scheme;

[0019] If the current environment is a low temperature environment, the range extender executes a second range extender startup scheme.

[0020] According to the control method of the extended-range electric vehicle starting system provided by an embodiment of the present invention, the first range extender starting scheme includes:

[0021] Controlling the range extender pre-charging relay to close, so that the range extender pre-charging relay performs pre-charging;

[0022] After the pre-charging of the range extender pre-charging relay is completed, controlling the range extender relay to close;

[0023] The range extender generator is powered on and started;

[0024] The vehicle controller sends a start command to the range extender controller, and the range extender controller controls the range extender generator to start the range extender engine;

[0025] The range extender engine drives the range extender generator to generate electricity.

[0026] According to the control method of the extended-range electric vehicle starting system provided by an embodiment of the present invention, the second range extender starting scheme includes:

[0027] Controlling the range extender pre-charging relay to close, so that the range extender pre-charging relay performs pre-charging;

[0028] After the pre-charging of the range extender pre-charging relay is completed, controlling the range extender relay to close;

[0029] The range extender generator is powered on and started;

[0030] The vehicle controller controls the automatic clutch disengagement of the range extender;

[0031] The vehicle controller sends a command to the range extender controller, and the range extender controller controls the engine starter to start the range extender engine.

[0032] According to the control method of the extended-range electric vehicle starting system provided by an embodiment of the present invention, the control method of the extended-range electric vehicle starting system further includes:

[0033] If the current environment is a low temperature environment, the vehicle controller limits the power required by the vehicle to P veh-req Less than the range extender power P er ;

[0034] If the high-voltage power battery is not allowed to be charged in a low-temperature environment, the vehicle controller prohibits the high-voltage power battery from performing energy recovery.

[0035] The beneficial effects of the present invention are as follows: the embodiment of the present invention provides a starting system and control method for an extended-range electric vehicle. By adding a range extender automatic clutch between the range extender generator and the range extender engine, the range extender generator and the range extender engine can be separated; and the engine starter is driven by a low-voltage starting power supply, and the range extender engine is started by the engine starter. In a low-temperature environment, when the power battery has insufficient charging and discharging capacity, the range extender can still be reliably started, and the vehicle can be driven to maintain a certain speed, so that the applicable geographical range of the vehicle is expanded to meet the needs of more users. At the same time, in a low-temperature environment, the power battery does not need to be charged and discharged with a large power, and the service life of the power battery can also be improved. The extended-range electric vehicle starting system provided in this embodiment has a simple structure and a relatively low production cost. It is suitable for various environments, and has high efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0037] Figure 1 This is a schematic diagram of the structure of the extended-range electric vehicle starting system provided in this embodiment. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0040] 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 reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0041] The embodiments of the present invention aim to solve the problems that the internal combustion engine and the generator in the range extender in the prior art are rigidly connected, the internal combustion engine cannot be started independently, the vehicle ambient temperature is very low, the discharge capacity of the power battery in a low temperature environment is limited and the power battery is prohibited from charging at sub-zero temperatures, while the generator consumes a large amount of power when driving the internal combustion engine to start, and the instantaneous large power discharge will affect the battery life. A starting system and control method for an extended-range electric vehicle are proposed, the structure is optimized and a new control method is proposed, so that the range extender can still be reliably started when the power battery has insufficient charging and discharging capacity.

[0042] Figure 1 This is a schematic diagram of the structure of the extended-range electric vehicle starting system provided in this embodiment.

[0043] like Figure 1 As shown, the extended-range electric vehicle starting system provided in this embodiment includes:

[0044] Range extender engine, engine starter, range extender automatic clutch, range extender generator, generator controller, high-voltage power battery, range extender controller, vehicle controller and low-voltage starting power supply;

[0045] The high-voltage power battery is connected to the generator controller and the range extender generator through a high-voltage wiring harness; the engine starter, the range extender engine, the range extender automatic clutch and the range extender generator are connected through mechanical transmission; the engine starter and the range extender automatic clutch are connected to the low-voltage starting power supply through a wiring harness, and the low-voltage starting power supply provides working power; the vehicle controller, the range extender controller and the generator controller are connected through control signals, and the vehicle controller and the engine starter and the range extender automatic clutch are connected through control signals;

[0046] Among them, when the vehicle controller determines that the environment is low temperature, the vehicle controller controls the range extender automatic clutch to disengage, disconnects the connection between the range extender engine and the range extender generator, and the range extender controller controls the engine starter to drive the range extender engine to complete starting.

[0047] Specifically, in the extended-range electric vehicle starting system, the vehicle controller is responsible for the distribution of the vehicle's operating power, the vehicle's drive motor provides torque for the vehicle to travel, and the high-voltage power battery provides energy for the drive motor. The voltage of the high-voltage power battery is generally several hundred volts. The range extender provided in this embodiment is composed of the range extender engine, the engine starter, the range extender automatic clutch, the range extender generator, the generator controller and the range extender controller. The range extender is newly equipped with the range extender automatic clutch, which can separate the range extender engine and the range extender generator and disconnect the mechanical connection between the two. The engine starter and the range extender automatic clutch are provided with energy by the low-voltage starting power supply.

[0048] Among them, in this embodiment, the range extender automatic clutch can be selected as an electromagnetic clutch; the low-voltage starting power supply is a 12-volt low-voltage power supply or a 24-volt low-voltage power supply.

[0049] Specifically, Figure 1 As shown, the low-temperature starting system for the extended-range electric vehicle also includes: a range extender relay, a range extender pre-charge relay and a range extender pre-charge resistor.

[0050] The range extender pre-charging relay and the range extender pre-charging resistor are connected in series and in parallel with the range extender relay, and the high-voltage power battery is connected to the range extender pre-charging relay, the range extender pre-charging resistor, the range extender relay and the range extender generator through a high-voltage line.

[0051] Wherein, when the vehicle controller controls the range extender generator to start, the vehicle controller controls the range extender pre-charging relay to close, and after the pre-charging of the range extender pre-charging relay is completed, the range extender relay is closed, and the range extender generator is powered on and started.

[0052] Specifically, in this embodiment, the vehicle controller determines that the range extender needs to be started to provide power supply according to the power required by the vehicle, and the vehicle controller controls the start of the range extender according to the current temperature.

[0053] When the vehicle controller determines that the environment is not low temperature, the vehicle controller sends an instruction to the range extender controller, and the range extender controller controls the range extender generator to start the range extender engine.

[0054] When the vehicle controller determines that the environment is low temperature, the vehicle controller controls the range extender automatic clutch to disengage, disconnects the connection between the range extender engine and the range extender generator, and the range extender controller controls the engine starter to drive the range extender engine to complete starting.

[0055] Wherein, when the vehicle controller determines that the environment is low temperature, the vehicle controller limits the vehicle power to be less than or equal to the power provided by the range extender engine. When the vehicle controller determines that the environment is low temperature, the vehicle controller determines whether the high-voltage power battery is allowed to be charged, and limits or prohibits energy recovery.

[0056] In this embodiment, the low temperature environment is the lowest temperature at which the high voltage power battery can work normally according to its own properties. Any temperature lower than the lowest temperature at which the high voltage power battery can work normally is a low temperature environment.

[0057] Specifically, when the vehicle controller determines that the current temperature is a non-low temperature environment and the temperature of the high-voltage power battery is also normal, when the vehicle is driving, the vehicle controller determines that the range extender needs to be started to provide power supply according to the power requirements of the vehicle, and the vehicle controller controls the range extender pre-charging relay to close, and the range extender pre-charging relay performs pre-charging. After the pre-charging of the range extender pre-charging relay is completed, the range extender relay is controlled to close, and the range extender generator is powered on and started. Then the vehicle controller sends a start instruction to the range extender controller, and the range extender controller controls the range extender generator to start the range extender engine. After the range extender engine is successfully started, the range extender engine drives the range extender generator to generate electricity, and together with the high-voltage power battery, provides electrical energy to the vehicle to meet the power required by the vehicle.

[0058] When the ambient temperature is relatively low, such as at -20°C, the temperature of the high-voltage power battery is also low. At this time, the high-voltage power battery cannot provide instantaneous high power to the outside for vehicle driving. Generally, it is necessary to use a heating device to raise the temperature of the high-voltage power battery to a temperature at which normal operation can be performed before the high-voltage power battery can be used. However, it takes a long time to heat the high-voltage power battery by a heating device, which will affect the user's use. The range extender engine has good adaptability to low-temperature environments. Therefore, in this embodiment, the range extender engine can be started independently first. After the range extender engine is started and stabilized, the range extender engine drives the range extender generator to generate electricity to supply the vehicle. During the driving of the vehicle, the heat generated by the operation of the range extender engine is used to heat the high-voltage power battery to reduce the impact on user use.

[0059] Specifically, when the vehicle controller determines that the current temperature is a low temperature environment, if the vehicle is started for the first time, the driver powers on the vehicle according to conventional operations, and after the vehicle is in a drivable state, the vehicle controller determines whether the output capacity of the high-voltage power battery can meet the power demand of the vehicle based on the temperature of the high-voltage power battery and the currently available power. If the output capacity of the high-voltage power battery cannot meet the power demand of the vehicle, the range extender needs to be started. The vehicle controller controls the range extender pre-charging relay to close, and the range extender pre-charging relay performs pre-charging. After the pre-charging of the range extender pre-charging relay is completed, the range extender relay is controlled to close, and the range extender generator is powered on and started. Then the vehicle controller controls the range extender automatic clutch to disengage, so that the range extender engine and the range extender generator are disconnected. Then the vehicle controller sends an instruction to the range extender controller, and the range extender controller controls the engine starter to start the range extender engine. After the range extender engine is started, the waste heat generated by the operation of the range extender engine can be used to heat the high-voltage power battery.

[0060] In particular, the range extender is started in a low temperature environment. When the driver is driving the vehicle, if the temperature of the high-voltage power battery has not yet risen to the normal working temperature, the supply power allowed to be discharged by the high-voltage power battery is relatively small, and the battery is not allowed to be charged when the temperature of the high-voltage power battery is low. Therefore, the vehicle controller determines the power required by the vehicle at this time as P according to the driver's operation. veh-req , and the power that the range extender can provide at this time is P er At this time, the vehicle controller limits the power P required by the vehicle veh-req Less than the range extender power P er The required power of the whole vehicle is provided by the range extender, and the high-voltage power battery does not provide power supply to protect the high-voltage power battery.

[0061] Since the power of the range extender engine in the range extender is relatively small compared to the engine power of an ordinary internal combustion engine, in this embodiment, the vehicle controller limits the driving speed of the vehicle in a low temperature environment. For example, the maximum speed of the vehicle is limited to no more than 20 km / h, and the power that the range extender can provide is met by limiting the power required by the vehicle.

[0062] In a low temperature environment, when the vehicle needs to coast or brake, if the temperature of the high-voltage power battery has not yet risen to the normal temperature, the high-voltage power battery is still not allowed to be charged, then the high-voltage power battery is prohibited from performing energy recovery, and at the same time the vehicle controller controls the range extender automatic clutch to disengage, and controls the range extender controller to control the range extender generator to stop output, and the range extender engine to stop torque output, so as to keep the range extender running stably.

[0063] This embodiment also provides a control method for a range-extended electric vehicle starting system, including:

[0064] The vehicle controller determines whether the range extender needs to be started;

[0065] The vehicle controller determines whether the current ambient temperature is a preset low temperature environment;

[0066] If the current environment is a non-low temperature environment, the range extender executes a first range extender startup scheme;

[0067] If the current environment is a low temperature environment, the range extender executes a second range extender startup scheme.

[0068] Specifically, the first range extender startup scheme includes:

[0069] Controlling the range extender pre-charging relay to close, so that the range extender pre-charging relay performs pre-charging;

[0070] After the pre-charging of the range extender pre-charging relay is completed, controlling the range extender relay to close;

[0071] The range extender generator is powered on and started;

[0072] The vehicle controller sends a start command to the range extender controller, and the range extender controller controls the range extender generator to start the range extender engine;

[0073] The range extender engine drives the range extender generator to generate electricity.

[0074] Specifically, according to the control method of the extended-range electric vehicle starting system provided by the embodiment of the present invention, when the vehicle controller determines that the current temperature is a non-low temperature environment and the temperature of the high-voltage power battery is also normal, when the vehicle is driving, the vehicle controller determines that the range extender needs to be started to provide power supply according to the power requirements of the vehicle, and the vehicle controller controls the range extender pre-charging relay to close, and the range extender pre-charging relay performs pre-charging. After the pre-charging of the range extender pre-charging relay is completed, the range extender relay is controlled to close, and the range extender generator is powered on and started. Then the vehicle controller sends a start instruction to the range extender controller, and the range extender controller controls the range extender generator to start the range extender engine. After the range extender engine is successfully started, the range extender engine drives the range extender generator to generate electricity, and together with the high-voltage power battery, provides electrical energy to the vehicle to meet the power required by the vehicle.

[0075] Specifically, the second range extender startup scheme includes:

[0076] Controlling the range extender pre-charging relay to close, so that the range extender pre-charging relay performs pre-charging;

[0077] After the pre-charging of the range extender pre-charging relay is completed, controlling the range extender relay to close;

[0078] The range extender generator is powered on and started;

[0079] The vehicle controller controls the automatic clutch disengagement of the range extender;

[0080] The vehicle controller sends a command to the range extender controller, and the range extender controller controls the engine starter to start the range extender engine.

[0081] Wherein, the control method of the extended-range electric vehicle starting system also includes:

[0082] If the current environment is a low temperature environment, the vehicle controller limits the power required by the vehicle to P veh-req Less than the range extender power P er ;

[0083] If the high-voltage power battery is not allowed to be charged in a low-temperature environment, the vehicle controller prohibits the high-voltage power battery from performing energy recovery.

[0084] Specifically, according to the control method of the extended-range electric vehicle starting system provided by the embodiment of the present invention, the range extender is started in a low-temperature environment. When the driver drives the vehicle, if the temperature of the high-voltage power battery has not yet risen to the normal working temperature, the supply power allowed to be discharged by the high-voltage power battery is relatively small, and the battery is not allowed to be charged when the temperature of the high-voltage power battery is low. Therefore, the vehicle controller determines the power required by the vehicle at this time as P according to the driver's operation. veh-req , and the power that the range extender can provide at this time is P er At this time, the vehicle controller limits the power P required by the vehicle veh-req Less than the range extender power P er The required power of the whole vehicle is provided by the range extender, and the high-voltage power battery does not provide power supply to protect the high-voltage power battery.

[0085] Since the power of the range extender engine in the range extender is relatively small compared to the engine power of an ordinary internal combustion engine, in this embodiment, the vehicle controller limits the driving speed of the vehicle in a low temperature environment. For example, the maximum speed of the vehicle is limited to no more than 20 km / h, and the power that the range extender can provide is met by limiting the power required by the vehicle.

[0086] In a low temperature environment, when the vehicle needs to coast or brake, if the temperature of the high-voltage power battery has not yet risen to the normal temperature, the high-voltage power battery is still not allowed to be charged, then the high-voltage power battery is prohibited from performing energy recovery, and at the same time the vehicle controller controls the range extender automatic clutch to disengage, and controls the range extender controller to control the range extender generator to stop output, and the range extender engine to stop torque output, so as to keep the range extender running stably.

[0087] The embodiment of the present invention provides a starting system and control method for an extended-range electric vehicle. By adding a range extender automatic clutch between the range extender generator and the range extender engine, the range extender generator and the range extender engine can be separated; and the engine starter is driven by a low-voltage starting power supply, and the range extender engine is started by the engine starter. In a low-temperature environment, when the power battery has insufficient charging and discharging capacity, the range extender can still be reliably started and can drive the vehicle to maintain a certain speed, so that the applicable geographical range of the vehicle is expanded to meet the needs of more users. At the same time, in a low-temperature environment, the power battery does not need to be charged and discharged with a large power, which can also increase the service life of the power battery. The extended-range electric vehicle starting system provided by this embodiment has a simple structure and a relatively low production cost. It is suitable for various environments, and has high efficiency and safety.

[0088] Although the preferred embodiments of the embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the attached claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention. Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0089] The above is a detailed introduction to the extended-range electric vehicle starting system and control method provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A range-extended electric vehicle starting system, characterized in that: include: Range extender engine, engine starter, range extender automatic clutch, range extender generator, generator controller, high-voltage power battery, range extender controller, vehicle controller and low-voltage starting power supply; The high-voltage power battery is connected to the generator controller and the range extender generator through a high-voltage wiring harness; the engine starter, the range extender engine, the range extender automatic clutch and the range extender generator are connected through mechanical transmission; the engine starter and the range extender automatic clutch are connected to the low-voltage starting power supply through a wiring harness, and the low-voltage starting power supply provides working power; the vehicle controller, the range extender controller and the generator controller are connected through control signals, and the vehicle controller and the engine starter and the range extender automatic clutch are connected through control signals; Among them, when the vehicle controller determines that the environment is low temperature, the vehicle controller controls the range extender automatic clutch to disengage, disconnects the connection between the range extender engine and the range extender generator, and the range extender controller controls the engine starter to drive the range extender engine to complete starting.

2. The extended-range electric vehicle starting system according to claim 1, characterized in that: The range-extended electric vehicle starting system further includes: a range extender relay, a range extender pre-charge relay, and a range extender pre-charge resistor; The range extender pre-charging relay and the range extender pre-charging resistor are connected in series and in parallel with the range extender relay, and the high-voltage power battery is connected to the range extender pre-charging relay, the range extender pre-charging resistor, the range extender relay and the range extender generator through a high-voltage line.

3. The extended-range electric vehicle starting system according to claim 2, characterized in that: The vehicle controller controls the range extender generator to start, and controls the range extender pre-charging relay to close. After the range extender pre-charging relay is pre-charged, the range extender relay is closed, and the range extender generator is powered on and started.

4. The extended-range electric vehicle starting system according to claim 3, characterized in that: When the vehicle controller determines that the environment is not low temperature, the vehicle controller sends an instruction to the range extender controller, and the range extender controller controls the range extender generator to start the range extender engine.

5. The extended-range electric vehicle starting system according to claim 4, characterized in that: When the vehicle controller determines that the environment is low temperature, the vehicle controller limits the vehicle power to be less than or equal to the power provided by the range extender engine.

6. The extended-range electric vehicle starting system according to claim 5, characterized in that: When the vehicle controller determines that the environment is low temperature, the vehicle controller determines whether the high-voltage power battery is allowed to be charged, and limits or prohibits energy recovery.

7. A control method for a starting system of an extended-range electric vehicle according to any one of claims 2 to 6, characterized in that: include: The vehicle controller determines whether the range extender needs to be started; The vehicle controller determines whether the current ambient temperature is a preset low temperature environment; If the current environment is a non-low temperature environment, the range extender executes a first range extender startup scheme; If the current environment is a low temperature environment, the range extender executes a second range extender startup scheme; The first range extender startup scheme includes: Controlling the range extender pre-charging relay to close, so that the range extender pre-charging relay performs pre-charging; After the pre-charging of the range extender pre-charging relay is completed, controlling the range extender relay to close; The range extender generator is powered on and started; The vehicle controller sends a start command to the range extender controller, and the range extender controller controls the range extender generator to start the range extender engine; The range extender engine drives the range extender generator to generate electricity; The second range extender startup scheme includes: Controlling the range extender pre-charging relay to close, so that the range extender pre-charging relay performs pre-charging; After the pre-charging of the range extender pre-charging relay is completed, controlling the range extender relay to close; The range extender generator is powered on and started; The vehicle controller controls the automatic clutch disengagement of the range extender; The vehicle controller sends a command to the range extender controller, and the range extender controller controls the engine starter to start the range extender engine.

8. The control method of the extended-range electric vehicle starting system according to claim 7, characterized in that: The control method of the extended-range electric vehicle starting system also includes: If the current environment is a low temperature environment, the vehicle controller limits the power required by the vehicle to P veh-req Less than the range extender power P er ; If the high-voltage power battery is not allowed to be charged in a low-temperature environment, the vehicle controller prohibits the high-voltage power battery from performing energy recovery.

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