Range extender, starting method of range extender, vehicle

Abstract

The application provides a range extender, a starting method of the range extender and a vehicle. The range extender comprises an internal combustion engine, a generator and a generator controller. The generator controller comprises an inverter module and a rectifier module. The internal combustion engine is connected with the generator. The generator is connected with a battery pack through the rectifier module. The generator is also connected with the battery pack through the inverter module. The inverter module comprises a switch group for controlling the on-off of the inverter module. The existing range extender has problems of easy damage of parallel power devices and easy heating of series resistors. The application can save the series resistors and avoid the safety hazard caused by the heating of the resistors by setting the switch group to control the on-off of the inverter module. The large current caused by the uneven current of the parallel devices can be avoided by disconnecting the inverter module through the switch group after the range extender is started.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, specifically to range extenders, range extender starting methods, and vehicles. Background Technology

[0002] Range-extended electric vehicles (REEVs) are highly competitive products in the post-subsidy era. The technological roadmap for REEVs is also becoming increasingly clear. The range extender system and controller, as components of this technology, significantly impact the system's cost.

[0003] In the low-cost, high-performance solution, generator-driven starting and natural rectification technology is the most popular choice among manufacturers. Figure 1 This is an existing starter motor controller. For example... Figure 1 As shown, in a generator controller, the positive terminals of the three-phase natural rectifier diodes and the three-phase inverter bridge arms are directly connected by wires or connected together by a low-resistance resistor R. In generator controllers with the low-resistance resistor R connected directly, the resistor R is prone to overheating, affecting thermal reliability. Furthermore, it only controls current sharing for devices connected to R, not for unbalanced current distribution in devices not connected to R, resulting in a high failure rate. In generator controllers where the positive terminals of the three-phase natural rectifier diodes and the three-phase inverter bridge arms are directly connected, the body diodes of the inverter bridge arms and their corresponding diodes of the rectifier bridge arms operate in parallel during power generation; the body diodes of D1 and Q1 also operate in parallel. The current distribution of the parallel-operated diodes is related to temperature and circuit resistance, making it difficult to control. Under adverse conditions, the current almost entirely flows through the body diodes of the inverter bridge arms. Therefore, this type of product often suffers from the problem of easily damaged power switching devices.

[0004] Therefore, how to optimize the circuit structure of the range extender and improve its reliability has become a technical problem that urgently needs to be solved and a key research focus for those skilled in the art. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a range extender, a method for starting the range extender, and a vehicle, to solve the problems in the prior art where the power devices connected in parallel in the range extender are easily damaged and the resistors connected in series are easily overheated.

[0006] Therefore, the embodiments of the present invention provide the following technical solutions:

[0007] In a first aspect, the present invention provides a range extender, comprising an internal combustion engine, a generator, and a generator controller;

[0008] The generator controller includes an inverter module and a rectifier module;

[0009] The internal combustion engine is connected to the generator;

[0010] The generator is connected to the battery pack via the rectifier module;

[0011] The generator is also connected to the battery pack via the inverter module;

[0012] The inverter module includes a switch group, which is used to control the on / off state of the inverter module.

[0013] Furthermore, the inverter module includes 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;

[0014] The switch group includes a first switch, a second switch, and a third switch;

[0015] The first inverter unit includes at least one first transistor, the collector of the first transistor is connected to the positive terminal of the battery pack, and the emitter of the first transistor is connected to the first phase line of the generator through the first switch;

[0016] The second inverter unit includes at least one second transistor, the collector of the second transistor is connected to the positive terminal of the battery pack, and the emitter of the second transistor is connected to the second phase line of the generator through the second switch;

[0017] The third inverter unit includes at least one third transistor, the collector of which is connected to the positive terminal of the battery pack, and the emitter of which is connected to the third phase line of the generator through the third switch.

[0018] The fourth inverter unit includes at least one fourth transistor. The collector of the fourth transistor is connected to the first phase line of the generator through the first switch, and the emitter of the fourth transistor is connected to the negative terminal of the battery pack.

[0019] The fifth inverter unit includes at least one fifth transistor, the collector of which is connected to the second phase line of the generator through the second switch, and the emitter of which is connected to the negative terminal of the battery pack.

[0020] The sixth inverter unit includes at least one sixth transistor. The collector of the sixth transistor is connected to the third phase line of the generator through the third switch, and the emitter of the sixth transistor is connected to the negative terminal of the battery pack.

[0021] Furthermore, 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.

[0022] Furthermore, the generator controller also includes a first supporting capacitor, one end of which is connected to the positive terminal of the battery pack, and the other end of which is connected to the negative terminal of the battery pack.

[0023] Furthermore, the inverter module includes 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;

[0024] The switch group includes a fourth switch and a fifth switch;

[0025] The seventh inverter includes at least one seventh transistor, the collector of which is connected to the positive terminal of the battery pack via the fourth switch, and the emitter of which is connected to the first phase line of the generator.

[0026] The eighth inverter includes at least one eighth transistor, the collector of which is connected to the positive terminal of the battery pack via the fourth switch, and the emitter of which is connected to the second phase line of the generator.

[0027] The ninth inverter includes at least one ninth transistor, the collector of which is connected to the positive terminal of the battery pack via the fourth switch, and the emitter of which is connected to the third phase line of the generator.

[0028] The tenth inverter includes at least one thirteenth transistor, the collector of which is connected to the first phase line of the generator, and the emitter of which is connected to the negative terminal of the battery pack through the fifth switch.

[0029] The eleventh inverter includes at least one eleventh transistor, the collector of which is connected to the second phase line of the generator, and the emitter of which is connected to the negative terminal of the battery pack through the fifth switch.

[0030] The twelfth inverter includes at least one twelfth transistor, the collector of which is connected to the third phase line of the generator, and the emitter of which is connected to the negative terminal of the battery pack through the fifth switch.

[0031] Furthermore, the seventh, eighth, ninth, tenth, eleventh, and twelfth inverter units have the same structure.

[0032] Furthermore, the generator controller also includes a second supporting capacitor, one end of which is connected to the positive terminal of the battery pack via the fourth switch, and the other end of which is connected to the negative terminal of the battery pack via the fifth switch.

[0033] Furthermore, the rectifier module includes 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;

[0034] The first rectifier unit includes at least one first diode, the anode of the first diode is connected to the first phase line of the generator, and the cathode of the first diode is connected to the positive terminal of the battery pack.

[0035] The second rectifier unit includes at least one second diode, the positive terminal of which is connected to the second phase line of the generator, and the negative terminal of which is connected to the positive terminal of the battery pack.

[0036] The third rectifier unit includes at least one third diode, the positive terminal of which is connected to the third phase line of the generator, and the negative terminal of which is connected to the positive terminal of the battery pack.

[0037] The fourth rectifier unit includes at least one fourth diode, the positive terminal of which is connected to the negative terminal of the battery pack, and the negative terminal of which is connected to the first phase line of the generator.

[0038] The fifth rectifier unit includes at least one fifth diode, the positive terminal of which is connected to the negative terminal of the battery pack, and the negative terminal of which is connected to the second phase line of the generator.

[0039] The sixth rectifier unit includes at least one sixth diode, the positive terminal of which is connected to the negative terminal of the battery pack, and the negative terminal of which is connected to the third phase line of the generator.

[0040] In a second aspect, the present invention provides a method for starting a range extender, used in any embodiment of the first aspect of the present invention, comprising:

[0041] When the switch group is closed, the inverter module converts the electrical energy output by the battery pack into three-phase AC power and outputs it to the generator, which in turn drives the internal combustion engine to rotate.

[0042] Adjust the throttle opening to the first set value;

[0043] The first judgment result is obtained by determining whether the speed of the internal combustion engine is greater than or equal to the second set value;

[0044] If the first judgment result is yes, then ignition is performed;

[0045] A second determination is made based on whether ignition was successful.

[0046] If the second judgment result is yes, then the switch group is disconnected and the opening of the throttle valve is increased.

[0047] In a third aspect, the present invention provides a vehicle for use with a range extender as described in any embodiment of the first aspect of the present invention, the range extender including a processor for executing a startup method of the range extender as described in any embodiment of the second aspect of the present invention.

[0048] The technical solution of the present invention has the following advantages:

[0049] This invention provides a range extender, a starting method for the range extender, and a vehicle. Existing range extenders suffer from problems such as easy damage to parallel power devices and overheating of series resistors. This invention controls the on / off state of the inverter module by setting up a switch group, eliminating the need for series resistors and avoiding safety hazards caused by resistor overheating. By setting up the switch group, the problem of uneven current distribution between the inverter tubes and rectifier tubes on the corresponding bridge arm can be completely solved. After the range extender starts, disconnecting the inverter module through the switch group prevents excessive current from flowing through and damaging the inverter module, thus improving the reliability of the range extender and the vehicle. Attached Figure Description

[0050] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0051] Figure 1 This is an existing starter motor controller;

[0052] Figure 2 This is a structural block diagram of the range extender according to an embodiment of the present invention;

[0053] Figure 3 This is a circuit diagram of the range extender according to an embodiment of the present invention;

[0054] Figure 4 This is a circuit diagram of a range extender according to another embodiment of the present invention;

[0055] Figure 5 This is a flowchart of the startup method of the range extender according to an embodiment of the present invention. Detailed Implementation

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0057] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0058] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0060] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0061] According to an embodiment of the present invention, a range extender starter motor controller embodiment is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0062] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0063] Figure 2 This is a structural block diagram of the range extender according to an embodiment of the present invention. Figure 2 As shown, this invention discloses a range extender, including an internal combustion engine 204, a generator 203, and a generator controller 202. The generator 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 a battery pack 201 via the rectifier module 2022. The generator 203 is also connected to the battery pack 201 via the inverter module 2021. The inverter module 2021 includes a switch group 20211, which controls the on / off state of the inverter module 2021.

[0064] In this embodiment, generator 203 is an integrated starter-generator. During the range extender startup process, generator 203 drives the internal combustion engine 204 to start. After the range extender starts, generator 203 converts the output power of internal combustion engine 204 into electrical energy. During the range extender startup process, switch group 20211 controls the inverter module 2021 to connect. Inverter module 2021 converts the DC power output from battery pack 201 into three-phase AC power and outputs it to generator 203. After the range extender completes startup, switch group 20211 controls the inverter module 2021 to disconnect. Rectifier module 2022 converts the AC power output from generator 203 into DC power and outputs it to battery pack 201.

[0065] Compared with the prior art, the above embodiment controls the on / off state of the inverter module 2021 by setting the switch group 20211, which eliminates the need for a series resistor and avoids safety hazards caused by resistor overheating. Disconnecting the inverter module 2021 by the switch group 20211 after the range extender starts can prevent a large current from flowing through and damaging the inverter module 2021.

[0066] Figure 3 This is a circuit diagram of a range extender according to an embodiment of the present invention. Figure 3 As shown, in one specific embodiment, the inverter module includes 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 includes a first switch SW1, a second switch SW2, and a third switch SW3. The first inverter unit includes at least one first transistor Q1, with its collector connected to the positive terminal of the battery pack, and its emitter connected to the first phase line of the generator via the first switch SW1. The second inverter unit includes at least one second transistor Q2, with its collector connected to the positive terminal of the battery pack, and its emitter connected to the second phase line of the generator via the second switch SW2. The third inverter unit includes at least one third transistor Q3, with its collector connected to the positive terminal of the battery pack, and its emitter connected to the third phase line of the generator via the third switch SW3. The fourth inverter unit includes at least one fourth transistor Q4. The collector of the fourth transistor Q4 is connected to the first phase line of the generator through a first switch SW1, and the emitter of the fourth transistor Q4 is connected to the negative terminal of the battery pack. The fifth inverter unit includes at least one fifth transistor Q5. The collector of the fifth transistor Q5 is connected to the second phase line of the generator through a second switch SW2, and the emitter of the fifth transistor Q5 is connected to the negative terminal of the battery pack. The sixth inverter unit includes at least one sixth transistor Q6. The collector of the sixth transistor Q6 is connected to the third phase line of the generator through a third switch SW3, and the emitter of the sixth transistor Q6 is connected to the negative terminal of the battery pack.

[0067] In this embodiment, the structures of the first inverter unit, second inverter unit, third inverter unit, fourth inverter unit, fifth inverter unit, and sixth inverter unit are preferably identical. The number of first transistor Q1, second transistor Q2, third transistor Q3, fourth transistor Q4, fifth transistor Q5, and sixth transistor Q6 can be set according to actual needs. During the start-up process of the range extender, the first switch SW1, second switch SW2, and third switch SW3 are closed. After the range extender completes the start-up, the first switch SW1, second switch SW2, and third switch SW3 are opened.

[0068] In one specific embodiment, the generator controller further includes a first supporting capacitor, one end of which is connected to the positive terminal of the battery pack, and the other end of which is connected to the negative terminal of the battery pack.

[0069] In this embodiment, the supporting capacitor is composed of at least one first capacitor C1 connected in parallel, and the number of first capacitors C1 can be set according to actual needs.

[0070] Figure 4 This is a circuit diagram of a range extender according to another embodiment of the present invention. Figure 4 As shown, in one specific embodiment, the inverter module includes 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 includes a fourth switch SW4 and a fifth switch SW5. The seventh inverter includes at least one seventh transistor Q7, the collector of which is connected to the positive terminal of the battery pack via the fourth switch SW4, and the emitter of which is connected to the first phase line of the generator. The eighth inverter includes at least one eighth transistor Q8, the collector of which is connected to the positive terminal of the battery pack via the fourth switch SW4, and the emitter of which is connected to the second phase line of the generator. The ninth inverter includes at least one ninth transistor Q9, the collector of which is connected to the positive terminal of the battery pack via the fourth switch SW4, and the emitter of which is connected to the third phase line of the generator. The tenth inverter includes at least one thirteenth transistor Q10. The collector of the thirteenth transistor Q10 is connected to the first phase line of the generator, and the emitter of the thirteenth transistor Q10 is connected to the negative terminal of the battery pack via the fifth switch SW5. The eleventh inverter includes at least one eleventh transistor Q11. The collector of the eleventh transistor Q11 is connected to the second phase line of the generator, and the emitter of the eleventh transistor Q11 is connected to the negative terminal of the battery pack via the fifth switch SW5. The twelfth inverter includes at least one twelfth transistor Q12. The collector of the twelfth transistor Q12 is connected to the third phase line of the generator, and the emitter of the twelfth transistor Q12 is connected to the negative terminal of the battery pack via the fifth switch SW5.

[0071] In this embodiment, during the start-up process of the range extender, the fourth switch SW4 and the fifth switch SW5 are closed, and after the range extender has completed the start-up, the fourth switch SW4 and the fifth switch SW5 are opened. The seventh, eighth, ninth, tenth, eleventh, and twelfth inverter units preferably have the same structure. The battery pack is also used to supply power to the vehicle's load.

[0072] In one specific embodiment, the generator controller further includes a second supporting capacitor, one end of which is connected to the positive terminal of the battery pack via a fourth switch SW4, and the other end of which is connected to the negative terminal of the battery pack via a fifth switch SW5.

[0073] In this embodiment, the second supporting capacitor is composed of at least one second capacitor C2 connected in parallel. The number of second capacitors C2 can be set according to actual needs. Any technical solution that sets a reasonable number of C2s is within the protection scope of this invention.

[0074] In one specific embodiment, the rectifier module includes 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 rectifier unit includes at least one first diode D1, with its anode connected to the first phase line of the generator and its cathode connected to the positive terminal of the battery pack. The second rectifier unit includes at least one second diode D2, with its anode connected to the second phase line of the generator and its cathode connected to the positive terminal of the battery pack. The third rectifier unit includes at least one third diode D3, with its anode connected to the third phase line of the generator and its cathode connected to the positive terminal of the battery pack. The fourth rectifier unit includes at least one fourth diode D4, with its anode connected to the negative terminal of the battery pack and its cathode connected to the first phase line of the generator. The fifth rectifier unit includes at least one fifth diode D5, with its anode connected to the negative terminal of the battery pack and its cathode connected to the second phase line of the generator. The sixth rectifier unit includes at least one sixth diode D6, the positive terminal of which is connected to the negative terminal of the battery pack, and the negative terminal of which is connected to the third phase line of the generator.

[0075] This invention also provides a method for starting a range extender, applicable to any of the range extenders described above. Figure 5 This is a flowchart of the startup method of the range extender according to an embodiment of the present invention, as follows: Figure 5 As shown, it includes the following steps:

[0076] S1: When the switch group is closed, the inverter module converts the electrical energy output from the battery pack into three-phase AC power and outputs it to the generator, which drives the internal combustion engine to rotate.

[0077] S2: Adjust the throttle opening to the first set value;

[0078] S3: Determine whether the speed of the internal combustion engine is greater than or equal to the second set value to obtain the first judgment result;

[0079] S4: If the first judgment result is yes, then ignite;

[0080] S5: Determine whether ignition was successful to obtain the second judgment result;

[0081] S6: If the second judgment result is yes, then disconnect the switch group and increase the throttle opening.

[0082] This invention also provides a vehicle including a range extender according to any of the above embodiments. The range extender includes a processor for executing the range extender startup method described above.

[0083] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A range extender, characterized in that, This includes internal combustion engines, generators, and generator controllers; The generator controller includes an inverter module and a rectifier module; The internal combustion engine is connected to the generator; The generator is connected to the battery pack via the rectifier module; The generator is also connected to the battery pack via the inverter module; The inverter module includes a first inverter unit, a second inverter unit, a third inverter unit, a fourth inverter unit, a fifth inverter unit, a sixth inverter unit, and a switch group. The switch group is used to control the on / off state of the inverter module. The switch group includes a first switch SW1, a second switch SW2, and a third switch SW3. The first switch SW1, the second switch SW2, and the third switch SW3 are respectively connected to the three-phase input terminals of the rectifier module and the corresponding branches connected to the three-phase output terminals of the inverter module, or... The inverter module includes a seventh inverter unit, an eighth inverter unit, a ninth inverter unit, a tenth inverter unit, an eleventh inverter unit, a twelfth inverter unit, and a switching assembly. The switch group includes a fourth switch SW4 and a fifth switch SW5, which are respectively connected to the DC output terminal of the rectifier module and the corresponding branch connected to the DC input terminal of the inverter module. During startup, the switch group controls the connection of the inverter module, which converts the DC power output from the battery pack into three-phase AC power and outputs it to the generator. After the range extender completes startup, the switch group is used to control the inverter module to disconnect.

2. The range extender according to claim 1, characterized in that, The first inverter unit includes at least one first transistor, the collector of the first transistor is connected to the positive terminal of the battery pack, and the emitter of the first transistor is connected to the first phase line of the generator through the first switch; The second inverter unit includes at least one second transistor, the collector of the second transistor is connected to the positive terminal of the battery pack, and the emitter of the second transistor is connected to the second phase line of the generator through the second switch; The third inverter unit includes at least one third transistor, the collector of which is connected to the positive terminal of the battery pack, and the emitter of which is connected to the third phase line of the generator through the third switch. The fourth inverter unit includes at least one fourth transistor. The collector of the fourth transistor is connected to the first phase line of the generator through the first switch, and the emitter of the fourth transistor is connected to the negative terminal of the battery pack. The fifth inverter unit includes at least one fifth transistor, the collector of which is connected to the second phase line of the generator through the second switch, and the emitter of which is connected to the negative terminal of the battery pack. The sixth inverter unit includes at least one sixth transistor. The collector of the sixth transistor is connected to the third phase line of the generator through the third switch, and the emitter of the sixth transistor is connected to the negative terminal of the battery pack.

3. The range extender according to claim 2, characterized in that, 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 according to claim 2, characterized in that, The generator controller further includes a first supporting capacitor, one end of which is connected to the positive terminal of the battery pack, and the other end of which is connected to the negative terminal of the battery pack.

5. The range extender according to claim 1, characterized in that, The seventh inverter includes at least one seventh transistor, the collector of which is connected to the positive terminal of the battery pack via the fourth switch, and the emitter of which is connected to the first phase line of the generator. The eighth inverter includes at least one eighth transistor, the collector of which is connected to the positive terminal of the battery pack via the fourth switch, and the emitter of which is connected to the second phase line of the generator. The ninth inverter includes at least one ninth transistor, the collector of which is connected to the positive terminal of the battery pack via the fourth switch, and the emitter of which is connected to the third phase line of the generator. The tenth inverter includes at least one thirteenth transistor, the collector of which is connected to the first phase line of the generator, and the emitter of which is connected to the negative terminal of the battery pack through the fifth switch. The eleventh inverter includes at least one eleventh transistor, the collector of which is connected to the second phase line of the generator, and the emitter of which is connected to the negative terminal of the battery pack through the fifth switch. The twelfth inverter includes at least one twelfth transistor, the collector of which is connected to the third phase line of the generator, and the emitter of which is connected to the negative terminal of the battery pack through the fifth switch.

6. The range extender according to claim 5, characterized in that, The seventh, eighth, ninth, tenth, eleventh, and twelfth inverter units have the same structure.

7. The range extender according to claim 5, characterized in that, The generator controller also includes a second supporting capacitor, one end of which is connected to the positive terminal of the battery pack via the fourth switch, and the other end of which is connected to the negative terminal of the battery pack via the fifth switch.

8. The range extender according to claim 1, characterized in that, The rectifier module includes 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 rectifier unit includes at least one first diode, the anode of the first diode is connected to the first phase line of the generator, and the cathode of the first diode is connected to the positive terminal of the battery pack. The second rectifier unit includes at least one second diode, the positive terminal of which is connected to the second phase line of the generator, and the negative terminal of which is connected to the positive terminal of the battery pack. The third rectifier unit includes at least one third diode, the positive terminal of which is connected to the third phase line of the generator, and the negative terminal of which is connected to the positive terminal of the battery pack. The fourth rectifier unit includes at least one fourth diode, the positive terminal of which is connected to the negative terminal of the battery pack, and the negative terminal of which is connected to the first phase line of the generator. The fifth rectifier unit includes at least one fifth diode, the positive terminal of which is connected to the negative terminal of the battery pack, and the negative terminal of which is connected to the second phase line of the generator. The sixth rectifier unit includes at least one sixth diode, the positive terminal of which is connected to the negative terminal of the battery pack, and the negative terminal of which is connected to the third phase line of the generator.

9. A method for starting a range extender, used in any one of claims 1-8, characterized in that, include: When the switch group is closed, the inverter module converts the electrical energy output by the battery pack into three-phase AC power and outputs it to the generator, which in turn drives the internal combustion engine to rotate. Adjust the throttle opening to the first set value; The first judgment result is obtained by determining whether the speed of the internal combustion engine is greater than or equal to the second set value; If the first judgment result is yes, then ignition is performed; A second determination is made based on whether ignition was successful. If the second judgment result is yes, then the switch group is disconnected and the opening of the throttle valve is increased.

10. A vehicle, characterized in that... The range extender includes any one of claims 1-8, the range extender including a processor, the processor being configured to execute the start-up method of the range extender according to claim 9.

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