Range extender, starting method of range extender and vehicle

文档序号：833090 发布日期：2021-03-30 浏览：49次中文

阅读说明：本技术 增程器、增程器的启动方法、车辆 (Range extender, starting method of range extender and vehicle ) 是由谷孝娟李丽于 2020-11-25 设计创作，主要内容包括：本发明提供了增程器、增程器的启动方法、车辆。该增程器包括内燃机、发电机和发电机控制器。发电机控制器包括逆变模块和整流模块。内燃机与发电机连接。发电机通过整流模块与电池组连接。发电机还通过逆变模块与电池组连接。逆变模块包括开关组,开关组用于控制逆变模块的通断。现有的增程器存在并联的功率器件易损坏、串联的电阻易发热的问题。本发明通过设置开关组来控制逆变模块的通断,能够省去串联的电阻,避免电阻发热造成安全隐患。在增程器启动后通过开关组断开逆变模块能够避免并联器件不均流造成的大量电流通过导致逆变模块损坏。(The invention provides a range extender, a starting method of the range extender and a vehicle. The range extender includes an internal combustion engine, a generator, and a generator controller. The generator controller comprises an inversion module and a rectification module. The internal combustion engine is connected with the generator. The generator is connected with the battery pack through the rectifying module. The generator is also connected with the battery pack through the inversion module. The inversion module comprises a switch group, and the switch group is used for controlling the on-off of the inversion module. The existing range extender has the problems that power devices connected in parallel are easy to damage, and resistors connected in series are easy to heat. According to the invention, the on-off of the inversion module is controlled by arranging the switch group, so that a resistor connected in series can be omitted, and potential safety hazards caused by heating of the resistor are avoided. The inverter module is disconnected through the switch group after the range extender is started, so that the damage of the inverter module caused by the passing of a large amount of current due to the uneven flow of parallel devices can be avoided.)

1. The range extender is characterized by comprising an internal combustion engine, a generator and a generator controller;

the generator controller comprises an inversion module and a rectification module;

the internal combustion engine is connected with the generator;

the generator is connected with the battery pack through the rectifying module;

the generator is also connected with a battery pack through the inversion module;

the inversion module comprises a switch group, and the switch group is used for controlling the on-off of the inversion module.

2. The range extender of claim 1, wherein the inverter module comprises a first inverter unit, a second inverter unit, a third inverter unit, a fourth inverter unit, a fifth inverter unit, and a sixth inverter unit;

the switch group comprises a first switch, a second switch and a third switch;

the first inversion unit comprises at least one first triode, a collector of the first triode is connected with the anode of the battery pack, and an emitter of the first triode is connected with a first phase line of the generator through the first switch;

the second inversion unit comprises at least one second triode, a collector of the second triode is connected with the anode of the battery pack, and an emitter of the second triode is connected with a second phase line of the generator through the second switch;

the third inversion unit comprises at least one third triode, a collector of the third triode is connected with the anode of the battery pack, and an emitter of the third triode is connected with a third phase line of the generator through the third switch;

the fourth inversion unit comprises at least one fourth triode, a collector of the fourth triode is connected with the first phase line of the generator through the first switch, and an emitter of the fourth triode is connected with the negative electrode of the battery pack;

the fifth inversion unit comprises at least one fifth triode, a collector of the fifth triode is connected with a second phase line of the generator through the second switch, and an emitter of the fifth triode is connected with a negative electrode of the battery pack;

the sixth inversion unit comprises at least one sixth triode, a collector of the sixth triode is connected with the third phase line of the generator through the third switch, and an emitter of the sixth triode is connected with the negative electrode of the battery pack.

3. The range extender of claim 2, wherein the first inverter unit, the second inverter unit, the third inverter unit, the fourth inverter unit, the fifth inverter unit and the sixth inverter unit have the same structure.

4. The range extender of claim 2, wherein the generator controller further comprises a first support capacitor, one end of the first support capacitor is connected to the positive pole of the battery pack, and the other end of the first support capacitor is connected to the negative pole of the battery pack.

5. The range extender of claim 1, wherein the inverter module comprises a seventh inverter unit, an eighth inverter unit, a ninth inverter unit, a tenth inverter unit, an eleventh inverter unit, and a twelfth inverter unit;

the switch group comprises a fourth switch and a fifth switch;

the seventh inverter comprises at least one seventh triode, a collector of the seventh triode is connected with the anode of the battery pack through the fourth switch, and an emitter of the seventh triode is connected with the first phase line of the generator;

the eighth inverter comprises at least one eighth triode, a collector of the eighth triode is connected with the positive electrode of the battery pack through the fourth switch, and an emitter of the eighth triode is connected with a second phase line of the generator;

the ninth inverter comprises at least one ninth triode, a collector of the ninth triode is connected with the anode of the battery pack through the fourth switch, and an emitter of the ninth triode is connected with the third phase line of the generator;

the tenth inverter comprises at least one thirteenth pole tube, a collector electrode of the thirteenth pole tube is connected with the first phase line of the generator, and an emitter electrode of the thirteenth pole tube is connected with the negative electrode of the battery pack through the fifth switch;

the eleventh inverter comprises at least one eleventh triode, a collector of the eleventh triode is connected with the second phase line of the generator, and an emitter of the eleventh triode is connected with the negative electrode of the battery pack through the fifth switch;

the twelfth inverter comprises at least one twelfth triode, a collector of the twelfth triode is connected with the third phase line of the generator, and an emitter of the twelfth triode is connected with the negative electrode of the battery pack through the fifth switch.

6. The range extender of claim 5, wherein the seventh inverter unit, the eighth inverter unit, the ninth inverter unit, the tenth inverter unit, the eleventh inverter unit and the twelfth inverter unit have the same structure.

7. The range extender of claim 5, wherein the generator controller further comprises a second support capacitor, one end of the second support capacitor is connected to the positive pole of the battery pack through the fourth switch, and the other end of the second support capacitor is connected to the negative pole of the battery pack through the fifth switch.

8. The range extender of claim 1, wherein the rectifier module comprises a first rectifier unit, a second rectifier unit, a third rectifier unit, a fourth rectifier unit, a fifth rectifier unit, and a sixth rectifier unit;

the first rectifying unit comprises at least one first diode, the anode of the first diode is connected with the first phase line of the generator, and the cathode of the first diode is connected with the anode of the battery pack;

the second rectifying unit comprises at least one second diode, the anode of the second diode is connected with a second phase line of the generator, and the cathode of the second diode is connected with the anode of the battery pack;

the third rectifying unit comprises at least one third diode, the anode of the third diode is connected with the third phase line of the generator, and the cathode of the third diode is connected with the anode of the battery pack;

the fourth rectifying unit comprises at least one fourth diode, the anode of the fourth diode is connected with the cathode of the battery pack, and the cathode of the fourth diode is connected with the first phase line of the generator;

the fifth rectifying unit comprises at least one fifth diode, the anode of the fifth diode is connected with the cathode of the battery pack, and the cathode of the fifth diode is connected with the second phase line of the generator;

the sixth rectifying unit comprises at least one sixth diode, the anode of the sixth diode is connected with the cathode of the battery pack, and the cathode of the sixth diode is connected with the third phase line of the generator.

9. A method of starting a range extender for use with a range extender according to any one of claims 1 to 8, comprising:

the switch group is closed, the inverter module converts the electric energy output by the battery pack into three-phase alternating current to be output to the generator, and the generator drags the internal combustion engine to rotate;

adjusting the opening of the throttle valve to a first set value;

judging whether the rotating speed of the internal combustion engine is greater than or equal to a second set value to obtain a first judgment result;

if the first judgment result is yes, igniting;

judging whether the ignition is successful or not to obtain a second judgment result;

and if the second judgment result is yes, the switch group is disconnected, and the opening degree of the throttle valve is increased.

10. A vehicle comprising a range extender according to any one of claims 1 to 8, the range extender comprising a processor for performing the method of starting the range extender of claim 9.

Technical Field

The invention relates to the technical field of new energy automobiles, in particular to a range extender, a starting method of the range extender and a vehicle.

Background

The extended range electric automobile is a very competitive product in the post subsidy era. The technical route of the range-extended electric vehicle is more and more clear. The range extender system and controller as in this technology route affect the cost of the system.

In the scheme with low cost and high cost performance, the generator is dragged to start, and the technical scheme of natural rectification is selected by most manufacturers. Fig. 1 is a conventional starter motor controller. As shown in fig. 1, the positive electrodes of the three-phase natural rectifier diodes and the positive electrodes of the three-phase inverter bridge arms in the generator controller are directly connected through a wire or connected together after a low-resistance resistor R is connected between the two positive electrodes. The generator controller connected with the low-resistance resistor R is easy to cause heating problems and influence thermal reliability, can only control the current equalizing problem of devices connected with the resistor R, cannot solve the problem of non-uniform current of devices not connected with the resistor R, and is high in failure rate. When the generator controller with the positive electrodes of the three-phase natural rectifier diodes and the three-phase inverter bridge arms directly connected generates electricity, the body diodes of the inverter bridge arms and the corresponding diodes of the rectifier bridge arms work in parallel, and the body diodes of D1 and Q1 work in parallel. The current distribution and temperature of the diodes working in parallel are related to the circuit resistance, and the control is difficult, and under severe conditions, the current almost completely passes through the body diode of the inverter bridge arm. Therefore, such products generally have a problem that the power switching device is easily damaged.

Therefore, how to optimize the circuit structure of the range extender and improve the reliability of the range extender becomes a key point of urgent solution and research for those skilled in the art.

Disclosure of Invention

In view of this, embodiments of the present invention provide a range extender, a starting method of the range extender, and a vehicle, so as to solve the problems in the prior art that a power device connected in parallel to the range extender is easily damaged, and a resistor connected in series is easily heated.

Therefore, the embodiment of the invention provides the following technical scheme:

in a first aspect of the invention, a range extender is provided, comprising an internal combustion engine, a generator and a generator controller;

the generator controller comprises an inversion module and a rectification module;

the internal combustion engine is connected with the generator;

the generator is connected with the battery pack through the rectifying module;

the generator is also connected with a battery pack through the inversion module;

the inversion module comprises a switch group, and the switch group is used for controlling the on-off of the inversion module.

Further, the inversion module comprises a first inversion unit, a second inversion unit, a third inversion unit, a fourth inversion unit, a fifth inversion unit and a sixth inversion unit;

the switch group comprises a first switch, a second switch and a third switch;

Further, the first inverter unit, the second inverter unit, the third inverter unit, the fourth inverter unit, the fifth inverter unit and the sixth inverter unit have the same structure.

Further, the generator controller further comprises a first supporting capacitor, one end of the first supporting capacitor is connected with the anode of the battery pack, and the other end of the first supporting capacitor is connected with the cathode of the battery pack.

Further, the inversion module comprises a seventh inversion unit, an eighth inversion unit, a ninth inversion unit, a tenth inversion unit, an eleventh inversion unit and a twelfth inversion unit;

the switch group comprises a fourth switch and a fifth switch;

Further, the seventh inverter unit, the eighth inverter unit, the ninth inverter unit, the tenth inverter unit, the eleventh inverter unit and the twelfth inverter unit have the same structure.

Furthermore, the generator controller further comprises a second supporting capacitor, one end of the second supporting capacitor is connected with the anode of the battery pack through the fourth switch, and the other end of the second supporting capacitor is connected with the cathode of the battery pack through the fifth switch.

Further, the rectifying module comprises a first rectifying unit, a second rectifying unit, a third rectifying unit, a fourth rectifying unit, a fifth rectifying unit and a sixth rectifying unit;

In a second aspect of the present invention, a method for starting a range extender is provided, where the range extender according to any embodiment of the first aspect of the present invention includes:

adjusting the opening of the throttle valve to a first set value;

judging whether the rotating speed of the internal combustion engine is greater than or equal to a second set value to obtain a first judgment result;

if the first judgment result is yes, igniting;

judging whether the ignition is successful or not to obtain a second judgment result;

and if the second judgment result is yes, the switch group is disconnected, and the opening degree of the throttle valve is increased.

In a third aspect of the present invention, there is provided a vehicle for use in the range extender of any one of the embodiments of the first aspect of the present invention, the range extender comprising a processor for executing the method for starting the range extender of any one of the embodiments of the second aspect of the present invention.

The technical scheme of the embodiment of the invention has the following advantages:

the embodiment of the invention provides a range extender, a starting method of the range extender and a vehicle. The existing range extender has the problems that power devices connected in parallel are easy to damage, and resistors connected in series are easy to heat. According to the invention, the on-off of the inversion module is controlled by arranging the switch group, so that a resistor connected in series can be omitted, and potential safety hazards caused by heating of the resistor are avoided. Through setting up the switch block, can thoroughly solve the uneven current problem of connecting in parallel of contravariant pipe and rectifier tube on corresponding bridge arm, can avoid a large amount of electric currents to lead to the contravariant module to damage through switch block disconnection contravariant module after the range extender starts, improved the reliability of range extender and vehicle.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a prior art starter motor controller;

FIG. 2 is a block diagram of a range extender according to an embodiment of the present invention;

FIG. 3 is a circuit diagram of a range extender according to an embodiment of the present invention;

FIG. 4 is a circuit diagram of a range extender according to another embodiment of the present invention;

fig. 5 is a flowchart of a method for starting the range extender according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

In accordance with an embodiment of the present invention, there is provided a range extender starting motor controller embodiment, it should be noted that the steps illustrated in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than presented herein.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Fig. 2 is a block diagram of a range extender according to an embodiment of the present invention. As shown in fig. 2, the invention discloses a range extender, which comprises an internal combustion engine 204, a generator 203 and a generator 203 controller 202. The generator 203 controller 202 includes an inverter module 2021 and a rectifier module 2022. The internal combustion engine 204 is connected to the generator 203. The generator 203 is connected to the battery pack 201 through a rectifier module 2022. The generator 203 is also connected to the battery pack 201 through an inverter module 2021. The inverter module 2021 includes a switch set 20211, and the switch set 20211 is used to control the on/off of the inverter module 2021.

In this embodiment, the generator 203 is a heuristic integrator. During the starting process of the range extender, the generator 203 is used for dragging the internal combustion engine 204 to start, and after the range extender is started, the generator 203 is used for converting the output power of the internal combustion engine 204 into electric energy. In the starting process of the range extender, the switch module 20211 is used for controlling the inverter module 2021 to be communicated, and the inverter module 2021 is used for converting the direct current electric energy output by the battery pack 201 into three-phase alternating current and outputting the three-phase alternating current to the generator 203. After the range extender is started, the switch group 20211 is used for controlling the inverter module 2021 to be switched off. The rectifier module 2022 is used for converting the ac power output by the generator 203 into dc power and outputting the dc power as the battery pack 201.

Compared with the prior art, the on-off of the inverter module 2021 is controlled by the switch group 20211, so that a series resistor can be omitted, and potential safety hazards caused by heating of the resistor are avoided. The inverter module 2021 is disconnected by the switch group 20211 after the range extender is started, so that the inverter module 2021 can be prevented from being damaged due to the fact that a large amount of current passes through the inverter module.

Fig. 3 is a circuit diagram of a range extender according to an embodiment of the invention. As shown in fig. 3, in a specific embodiment, the inverting module includes a first inverting unit, a second inverting unit, a third inverting unit, a fourth inverting unit, a fifth inverting unit, and a sixth inverting unit. The switch group includes a first switch SW1, a second switch SW2, and a third switch SW 3. The first inversion unit comprises at least one first triode Q1, the collector of the first triode Q1 is connected with the anode of the battery pack, and the emitter of the first triode Q1 is connected with the first phase line of the generator through a first switch SW 1. The second inverter unit comprises at least one second triode Q2, the collector of the second triode Q2 is connected with the positive electrode of the battery pack, and the emitter of the second triode Q2 is connected with the second phase line of the generator through a second switch SW 2. The third inversion unit comprises at least one third triode Q3, the collector of the third triode Q3 is connected with the anode of the battery pack, and the emitter of the third triode Q3 is connected with the third phase line of the generator through a third switch SW 3. The fourth inverting unit comprises at least one fourth triode Q4, the collector of the fourth triode Q4 is connected with the first phase line of the generator through the first switch SW1, and the emitter of the fourth triode Q4 is connected with the negative pole of the battery pack. The fifth inversion unit comprises at least one fifth triode Q5, the collector of the fifth triode Q5 is connected with the second phase line of the generator through a second switch SW2, and the emitter of the fifth triode Q5 is connected with the negative pole of the battery pack. The sixth inverter unit comprises at least one sixth triode Q6, the collector of the sixth triode Q6 is connected with the third phase line of the generator through a third switch SW3, and the emitter of the sixth triode Q6 is connected with the negative pole of the battery pack.

In this embodiment, the first inverter unit, the second inverter unit, the third inverter unit, the fourth inverter unit, the fifth inverter unit, and the sixth inverter unit preferably have the same structure. The number of the first triode Q1, the second triode Q2, the third triode Q3, the fourth triode Q4, the fifth triode Q5 and the sixth triode Q6 can be set according to actual requirements. During start-up of the range extender, the first switch SW1, the second switch SW2, and the third switch SW3 are closed. After the range extender is completely activated, the first switch SW 1. The second switch SW2 and the third switch SW3 are open.

In a specific embodiment, the generator controller further includes a first support capacitor, one end of the first support capacitor is connected to the positive electrode of the battery pack, and the other end of the first support capacitor is connected to the negative electrode of the battery pack.

In this embodiment, the supporting capacitor is formed by at least one first capacitor C1 connected in parallel, and the number of the first capacitors C1 may be set according to actual requirements.

Fig. 4 is a circuit diagram of a range extender according to another embodiment of the present invention. As shown in fig. 4, in a specific embodiment, the inverting module includes a seventh inverting unit, an eighth inverting unit, a ninth inverting unit, a tenth inverting unit, an eleventh inverting unit, and a twelfth inverting unit. The switch group includes a fourth switch SW4 and a fifth switch SW 5. The seventh inverter includes at least one seventh transistor Q7, a collector of the seventh transistor Q7 is connected to the positive electrode of the battery pack through a fourth switch SW4, and an emitter of the seventh transistor Q7 is connected to the first phase line of the generator. The eighth inverter includes at least one eighth transistor Q8, a collector of the eighth transistor Q8 is connected to the positive electrode of the battery pack through a fourth switch SW4, and an emitter of the eighth transistor Q8 is connected to the second phase line of the generator. The ninth inverter includes at least one ninth transistor Q9, a collector of the ninth transistor Q9 is connected to the positive electrode of the battery pack through a fourth switch SW4, and an emitter of the ninth transistor Q9 is connected to the third phase line of the generator. The tenth inverter includes at least one thirteenth diode Q10, the collector of which is connected to the first phase line of the generator, Q10, and the emitter of which is connected to the negative pole of the battery pack via a fifth switch SW5, Q10. The eleventh inverter includes at least one eleventh transistor Q11, a collector of the eleventh transistor Q11 is connected to the second phase line of the generator, and an emitter of the eleventh transistor Q11 is connected to the negative electrode of the battery pack through a fifth switch SW 5. The twelfth inverter comprises at least one twelfth triode Q12, the collector of the twelfth triode Q12 is connected with the third phase line of the generator, and the emitter of the twelfth triode Q12 is connected with the negative pole of the battery pack through a fifth switch SW 5.

In this embodiment, during the starting process of the range extender, the fourth switch SW4 and the fifth switch SW5 are closed, and after the range extender is started, the fourth switch SW4 and the fifth switch SW5 are opened. The seventh inversion unit, the eighth inversion unit, the ninth inversion unit, the tenth inversion unit, the eleventh inversion unit and the twelfth inversion unit preferably have the same structure. The battery pack is also used to supply power to the load of the vehicle.

In a specific embodiment, the generator controller further comprises a second supporting capacitor, one end of the second supporting capacitor is connected with the positive electrode of the battery pack through a fourth switch SW4, and the other end of the second supporting capacitor is connected with the negative electrode of the battery pack through a fifth switch SW 5.

In this embodiment, the second supporting capacitor is formed by connecting at least one second capacitor C2 in parallel, the number of the second capacitors C2 may be set according to actual requirements, and the technical scheme of setting the reasonable number C2 is within the protection scope of the present invention.

In a specific embodiment, the rectification module includes a first rectification unit, a second rectification unit, a third rectification unit, a fourth rectification unit, a fifth rectification unit, and a sixth rectification unit. The first rectifying unit comprises at least one first diode D1, the anode of the first diode D1 is connected with the first phase line of the generator, and the cathode of the first diode D1 is connected with the anode of the battery pack. The second rectifying unit comprises at least one second diode D2, the anode of the second diode D2 is connected with the second phase line of the generator, and the cathode of the second diode D2 is connected with the anode of the battery pack. The third rectifying unit comprises at least one third diode D3, the anode of the third diode D3 is connected with the third phase line of the generator, and the cathode of the third diode D3 is connected with the anode of the battery pack. The fourth rectifying unit comprises at least one fourth diode D4, the anode of the fourth diode D4 is connected with the cathode of the battery pack, and the cathode of the fourth diode D4 is connected with the first phase line of the generator. The fifth rectifying unit includes at least one fifth diode D5, an anode of the fifth diode D5 is connected to a cathode of the battery pack, and a cathode of the fifth diode D5 is connected to the second phase line of the generator. The sixth rectifying unit comprises at least one sixth diode D6, the anode of the sixth diode D6 is connected with the cathode of the battery pack, and the cathode of the sixth diode D6 is connected with the third phase line of the generator.

An embodiment of the present invention further provides a starting method for a range extender, which is used for the range extender in any of the embodiments, fig. 5 is a flowchart of the starting method for the range extender in the embodiment of the present invention, and as shown in fig. 5, the method includes the following steps:

s1: the switch group is closed, the inversion module converts the electric energy output by the battery pack into three-phase alternating current to be output to the generator, and the generator drags the internal combustion engine to rotate;

s2: adjusting the opening of the throttle valve to a first set value;

s3: judging whether the rotating speed of the internal combustion engine is greater than or equal to a second set value to obtain a first judgment result;

s4: if the first judgment result is yes, igniting;

s5: judging whether the ignition is successful or not to obtain a second judgment result;

s6: if the second judgment result is yes, the switch group is turned off, and the opening degree of the throttle valve is increased.

The embodiment of the invention also provides a vehicle which comprises the range extender of any one of the embodiments, wherein the range extender comprises a processor, and the processor is used for executing the starting method of the range extender.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.

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