Starting method and device of hybrid vehicle and hybrid vehicle

Abstract

The application provides a starting method and device of a hybrid vehicle and the hybrid vehicle. The hybrid vehicle at least comprises a power battery, a generator controller, a generator and an engine, the power battery is electrically connected with the generator controller through a first circuit, the first circuit is composed of a variable resistance element and a positive switch element connected in series, the positive switch element is used for controlling the positive output current of the power battery, the starting method of the hybrid vehicle comprises the following steps: obtaining a required voltage, calculating a starting resistance value according to the required voltage, and controlling the resistance value of the variable resistance element to be the starting resistance value, wherein the required voltage represents the voltage for starting the engine by the generator; detecting the bus voltage of the generator controller, and controlling the generator to start the engine in the case that the bus voltage is equal to the required voltage. Through the application, the problem that the engine is damaged due to the excessively high shaft voltage during the starting of the engine in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of starting control of a vehicle, in particular to a starting method and device of a hybrid vehicle, a computer readable storage medium and a hybrid vehicle. BACKGROUND

[0002] The range extender system mainly includes two key components, an engine and a generator. The connection mode of the engine and the generator can be integrated, that is, the generator is directly connected to the crankshaft end of the engine without a transition connecting piece. The connection mode of the engine and the generator can also increase an elastic coupling between the flywheel end of the engine and the generator as a transition connecting piece. However, in the integrated connection mode and the elastic coupling (non-insulating material) connection mode, the shaft voltage generated by the generator during the operation of the range extender is directly transmitted to the crankshaft bearing end of the engine. The increase of the shaft voltage and the shaft current generated thereby can cause bearing electric corrosion, lubricating oil cracking, and thus bearing abnormalities or engine damage. Through experimental analysis, the shaft voltage is greatly related to the voltage platform. The larger the voltage platform is, the more likely the shaft voltage is generated. In addition, the shaft voltage is higher under the engine starting condition of the generator reverse drag.

[0003] Therefore, in the range extender hybrid system, when the engine and the generator are directly connected or connected through a non-insulating coupling, the engine starting (especially the engine starting under the condition of the generator reverse drag) can cause the shaft voltage generated by the generator to be transmitted to the bearing of the engine, resulting in bearing electric corrosion, lubricating oil cracking, and thus bearing abnormalities or engine damage. SUMMARY

[0004] The main purpose of the present application is to provide a starting method, device, computer readable storage medium and hybrid vehicle of a hybrid vehicle, so as to at least solve the problem of engine damage caused by excessive shaft voltage during engine starting in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a starting method of a hybrid vehicle is provided. The hybrid vehicle at least includes a power battery, a generator controller, a generator and an engine. The power battery is electrically connected to the generator controller through a first circuit. The first circuit is composed of a variable resistance element and a positive switch element connected in series. The positive switch element is used to control the positive output current of the power battery. The starting method of the hybrid vehicle includes: obtaining a required voltage, calculating a starting resistance value according to the required voltage, and controlling the resistance value of the variable resistance element to be the starting resistance value, wherein the required voltage represents the voltage for starting the engine by the generator; detecting the bus voltage of the generator controller, and controlling the generator to start the engine in the case that the bus voltage is equal to the required voltage.

[0006] Optionally, the power battery is further electrically connected with the generator controller through a second circuit, the second circuit is parallel to the first circuit, the second circuit comprises a negative switch element, the negative switch element is used for controlling a negative output current of the power battery, before the demand voltage is acquired, the method further comprises: in a case that a high-voltage power-on signal is received, controlling the negative switch element to be closed, wherein the high-voltage power-on signal indicates that the hybrid vehicle is powered on at high voltage; controlling the resistance value of the variable resistance element to be a high-voltage resistance value, wherein the high-voltage resistance value indicates a resistance value corresponding to the hybrid vehicle being powered on at high voltage; controlling the positive switch element to be closed.

[0007] Optionally, after the positive switch element is controlled to be closed, the method further comprises: detecting a bus voltage of the generator controller, and in a case that the bus voltage is greater than or equal to a preset voltage, controlling the resistance value of the variable resistance element to be 0.

[0008] Optionally, after the generator is controlled to start the engine, the method further comprises: after the engine is successfully started, controlling the resistance value of the variable resistance element to be 0.

[0009] Optionally, the starting resistance value is calculated according to the demand voltage, comprising: acquiring a starting current; calculating a ratio of the demand voltage and the starting current to obtain the starting resistance value.

[0010] Optionally, the engine comprises a starter, and the method further comprises: in a case that the bus voltage is not equal to the demand voltage, controlling the starter to start the engine.

[0011] Optionally, the demand voltage is acquired, comprising: in a case that a generator starting demand is received, acquiring the demand voltage, wherein the generator starting demand indicates a demand for starting the engine using the generator.

[0012] According to another aspect of the present application, there is provided a starting device for a hybrid vehicle, the hybrid vehicle including at least a power storage device, a generator controller, a generator, and an engine, the power storage device being electrically connected to the generator controller through at least a first circuit, the first circuit being composed of a series connection of a variable resistance element and a positive switch element, the positive switch element being configured to control a positive output current of the power storage device, the starting device for the hybrid vehicle comprising: a first control unit configured to acquire a required voltage, calculate a starting resistance value based on the required voltage, and control the variable resistance element to have a resistance value of the starting resistance value, wherein the required voltage represents a voltage required for the generator to start the engine; and a second control unit configured to detect a bus voltage of the generator controller, and control the generator to start the engine when the bus voltage is equal to the required voltage.

[0013] According to still another aspect of the present application, there is provided a computer-readable storage medium including a stored program, wherein the computer-readable storage medium is caused to perform any of the starting methods for a hybrid vehicle when the program is executed.

[0014] According to yet another aspect of the present application, there is provided a hybrid vehicle including: a power storage device, a generator controller, a generator, and an engine, the power storage device being electrically connected to the generator controller through at least a first circuit, the first circuit being composed of a series connection of a variable resistance element and a positive switch element, the positive switch element being configured to control a positive output current of the power storage device, the engine including a starter, the starter and the generator being configured to control starting of the engine, the power storage device being electrically connected to the generator controller through a second circuit in parallel with the first circuit, the second circuit including a negative switch element configured to control a negative output current of the power storage device; one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the starting methods for a hybrid vehicle.

[0015] The application discloses a starting method of a hybrid vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings constituting a part of the specification of the application are used to provide further understanding of the application, the illustrative embodiments of the application and the description thereof are used to explain the application, and do not constitute improper limitation on the application. In the drawings:

[0017] Figure 1 A structure schematic diagram of a range extending hybrid system provided by an embodiment of the application is shown;

[0018] Figure 2 A schematic diagram of a generator controller power supply circuit in the prior art is shown;

[0019] Figure 3 A hardware structure block diagram of a mobile terminal for executing the starting method of the hybrid vehicle is shown;

[0020] Figure 4 A flowchart of the starting method of the hybrid vehicle is shown;

[0021] Figure 5 A schematic diagram of an optimized generator controller power supply circuit is shown;

[0022] Figure 6 A flowchart of the starting method of the specific hybrid vehicle is shown;

[0023] Figure 7 A structure block diagram of the starting device of the hybrid vehicle is shown.

[0024] In the above drawings, the following reference signs are used:

[0025] 1, engine; 2, coupling; 3, generator; 4, generator controller; 5, power battery; 6, drive motor; 7, drive motor controller; 8, main positive contactor; 9, pre-charge contactor; 10, main negative contactor; 11, pre-charge resistor; 12, electrically controlled rheostat; 102, processor; 104, memory; 106, transmission device; 108, input and output device. DETAILED DESCRIPTION

[0026] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0028] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] For the convenience of description, the following describes some nouns or terms related to the embodiments of the present application:

[0030] Shaft voltage: the potential difference between the two ends of the shaft, the local shaft and the ground during the operation of the motor. If the connecting part between the engine and the generator is not insulated, the shaft voltage will be transmitted to the engine crankshaft bearing.

[0031] The extended-range hybrid system is as follows Figure 1 As shown in the figure, the engine 1, the coupling 2 and the generator system (the generator 3 and the generator controller 4) in the extended-range hybrid system are called extenders. The connection mode between the engine 1 and the generator 3 can be Figure 1The hybrid system includes the following components: a power battery 5, a drive motor 6, and a drive motor controller 7. The power battery 5 provides power to the generator 3, or the generator 3 charges the power battery 5. The drive motor controller 7 controls the drive motor 6 to drive the vehicle. These components are connected by high-voltage wires.

[0032] The power supply circuit of the generator controller in the prior art is as follows Figure 2 As shown, the high-voltage process on the vehicle first controls the closing of the main negative contactor 10, then the pre-charge contactor 9. When the terminal voltage of the generator controller 4 reaches approximately 90% of the bus terminal voltage of the power battery 5, the main positive contactor 8 is controlled to close, and the pre-charge contactor 9 is opened simultaneously. A disadvantage of the current power supply circuit is that the pre-charge resistor 11 is a fixed configuration, and the resistance of the pre-charge resistor 11 cannot be adjusted in real time according to the bus voltage requirements of the generator controller 4.

[0033] As introduced in the background technology, the pre-charging resistor in the prior art is a fixed configuration, and the resistance value of the pre-charging resistor cannot be adjusted in real time according to the bus voltage requirement of the generator controller. When the engine is started (especially when the generator is reversely dragged to start the engine), the shaft voltage generated by the generator will be transmitted to the engine bearings, causing electrical corrosion of the bearings and cracking of the lubricating oil, which may further cause bearing abnormalities or engine damage. In order to solve the problem of excessively high shaft voltage that cannot be adjusted, the embodiments of the present application provide a method, device, computer-readable storage medium and hybrid vehicle for starting a hybrid vehicle.

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0035] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 3 FIG. 1 is a hardware structure diagram of a mobile terminal for a method of starting a hybrid vehicle according to an embodiment of the present invention. Figure 3 As shown, the mobile terminal may include one or more ( Figure 3 Only one is shown) a processor 102 (the processor 102 may include but is not limited to a microprocessor MCU or a programmable logic device FPGA and other processing devices) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input and output device 108 for communication functions. It will be understood by those skilled in the art that Figure 3 The structure shown is only for illustration and does not limit the structure of the mobile terminal. Figure 3more or less components than those shown, or configured differently from those shown, as Figure 3 illustrated.

[0036] The memory 104 is operable to store computer programs, such as software programs and modules of application software, such as the computer program corresponding to the method of starting the hybrid vehicle according to the embodiments of the present application. The processor 102 is operable to perform various functions and data processing, i.e. implement the above-mentioned method, by running the computer programs stored in the memory 104. The memory 104 can include a high-speed random access memory, and can further include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some examples, the memory 104 can further include a memory remotely located with respect to the processor 102, which can be connected to the mobile terminal through a network. Examples of the network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The transmission device 106 is operable to receive or send data via a network. The specific examples of the network can include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (NIC), which can be connected to other network devices through a base station so as to be able to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is operable to communicate with the Internet in a wireless manner.

[0037] In the present embodiment, a method of starting a hybrid vehicle is provided, which is operable in a mobile terminal, a computer terminal, or a similar computing device. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system, such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown.

[0038] Figure 4 is a flowchart of a method of starting a hybrid vehicle according to an embodiment of the present application, the hybrid vehicle including at least a power battery, a generator controller, a generator, and an engine, the power battery being electrically connected to the generator controller through a first circuit, the first circuit being composed of a variable resistance element and a positive switch element connected in series, the positive switch element being used to control the output current of the positive pole of the power battery. As Figure 4 shown, the method includes the following steps:

[0039] Step S201, obtaining a required voltage, calculating a starting resistance value according to the required voltage, and controlling the resistance value of the variable resistor element to be the starting resistance value, wherein the required voltage represents a voltage for the generator to start the engine;

[0040] Specifically, before starting the engine, the system needs to obtain the optimal voltage level required for engine starting, that is, the required voltage. This voltage level can be determined by the engine specifications, the current operating status, and the characteristics of the generator controller. Based on the obtained required voltage, the system calculates the resistance value of the variable resistor element that can adjust the generator controller terminal voltage to the required voltage through a preset mathematical model or algorithm. This resistance value is defined as the starting resistance value. Before the engine starts, the system will adjust the resistance value of the variable resistor element to the above-calculated starting resistance value to ensure that the generator controller terminal voltage is maintained at the required voltage level, thereby reducing the shaft voltage during the engine starting process and avoiding electrical corrosion of the bearings and cracking of the lubricating oil. The variable resistor element can be an electronically controlled rheostat, and the positive switch element can be a main positive contactor.

[0041] Step S202 : detecting the bus voltage of the generator controller, and controlling the generator to start the engine when the bus voltage is equal to the required voltage.

[0042] Specifically, before starting the engine, the system's voltage detection module monitors the generator controller's bus voltage in real time. Bus voltage is the primary voltage reference point for the generator controller's internal power supply circuits and is directly related to system stability and efficiency. Based on the engine's starting characteristics, generator capacity, and system safety requirements, a desired voltage is preset or dynamically calculated—the desired stable voltage value to be maintained during engine startup. This value is set to reduce shaft voltage during startup to prevent electrical corrosion of bearings and cracking of the lubricating oil. When the detected bus voltage matches the preset desired voltage, the system triggers the generator to start the engine through control circuitry or software instructions. This process ensures that the engine is started under optimal voltage conditions, thereby improving startup efficiency and safety.

[0043] By the embodiment, the variable resistance element is arranged in the loop of the positive switch element of the power battery and the generator controller, and the resistance value of the variable resistance element is controlled to be the starting resistance value during the starting process, and the engine is started by the generator when the bus voltage is equal to the required voltage. In the prior art, the shaft voltage is too high when the engine of the hybrid vehicle is started, which causes bearing damage and even engine damage. The application sets a series connection loop of the variable resistance element and the positive switch element, and adjusts the voltage between the power battery and the generator controller in real time through the variable resistance element, thereby avoiding the problem of too high shaft voltage when the engine is started. Therefore, the problem of engine damage caused by too high shaft voltage when the engine is started in the prior art can be solved, and the effects of reducing the shaft voltage when the engine is started and protecting the engine are achieved.

[0044] In the implementation process, the power battery is also electrically connected to the generator controller through a second circuit, the second circuit is connected in parallel with the first circuit, the second circuit includes a negative switch element, and the negative switch element is used to control the negative output current of the power battery. Before step S201, the method further includes: step S203, in the case that a high-voltage power-on signal is received, the negative switch element is controlled to be closed, wherein the high-voltage power-on signal indicates that the hybrid vehicle is started by high-voltage power-on; step S204, the resistance value of the variable resistance element is controlled to be a high-voltage resistance value, wherein the high-voltage resistance value indicates the resistance value corresponding to the high-voltage power-on starting of the hybrid vehicle; and step S205, the positive switch element is controlled to be closed. The method accurately controls the power-on process, avoids unnecessary energy loss, and helps to improve the energy utilization efficiency of the entire hybrid power system.

[0045] Specifically, the power battery directly supplies power to the generator controller through the first circuit, and the second circuit is connected in parallel with the first circuit, wherein the second circuit comprises a negative switch element for controlling a current path from the negative electrode of the power battery to the generator controller. The high-voltage power-on control process is as follows: when the hybrid vehicle is started with high-voltage power-on, the system first receives a high-voltage power-on signal, and then controls the negative switch element to be closed according to the signal: this step allows the current to flow from the negative electrode of the power battery to the generator controller, and prepares the power supply path for the starting process. The resistance value of the variable resistance element is controlled to be a high-voltage resistance value: the system calculates or sets a high-voltage resistance value in advance according to the high-voltage power-on starting characteristics of the hybrid vehicle, and adjusts the variable resistance element to the value to control the voltage rising process at the end of the generator controller, so as to avoid the risk of overvoltage. After the negative switch element is closed and the variable resistance element is adjusted to the high-voltage resistance value, the system controls the positive switch element to be closed, and the high-voltage power-on process of the power battery to the generator controller is completed. By closing the negative switch element and controlling the variable resistance element in advance, it can be ensured that the voltage at the end of the generator controller gradually rises to a safe level during the high-voltage power-on process, thereby avoiding the damage of instantaneous high-voltage impact to the system. The pre-set high-voltage resistance value can ensure that the voltage of the generator controller reaches the optimal starting condition during the starting process, thereby improving the starting efficiency and success rate. By precisely controlling the power-on process, unnecessary energy loss is avoided, which helps to improve the energy utilization efficiency of the entire hybrid power system. The negative switch element can be a main negative contactor.

[0046] In some optional embodiments, after controlling the positive switch element to be closed, the method further comprises the step S206 of detecting the bus voltage of the generator controller, and controlling the resistance value of the variable resistance element to be 0 when the bus voltage is greater than or equal to a preset voltage. Through the above steps, the method can ensure that the engine and the generator controller operate at a stable and efficient voltage, thereby reducing energy loss, prolonging the service life of the system, and improving the overall performance.

[0047] Specifically, after the engine is started and runs to a stable state, the system continuously monitors the bus voltage of the generator controller, which is an important indicator of the power supply state of the internal circuit of the generator controller. A threshold voltage is set, which is based on the normal operating conditions and safety standards of the engine and the generator controller, and is used to determine whether the bus voltage has reached a suitable level for stable power supply. Once it is detected that the bus voltage reaches or exceeds the preset voltage, the system instructs the resistance value of the variable resistance element to be adjusted to 0. This operation is equivalent to removing the resistance element in the power supply circuit, realizing that the generator controller directly obtains the voltage from the power battery, and ensuring stable and efficient power supply.

[0048] In some alternative embodiments, after the step S202 of controlling the generator to start the engine, the method further comprises a step S207 of controlling the variable resistance element to have a resistance value of 0 after the engine is successfully started. Through the above steps, the method minimizes the influence of the variable resistance element on the circuit in the stable power supply state, ensures that the generator controller can directly obtain the maximum efficient voltage supply from the power battery, and also reduces the energy loss on the resistance.

[0049] In the specific implementation process, after the engine is successfully started, the variable resistance element is controlled to gradually become 0 again, and the generator controller bus end voltage is restored to the normal value. The system monitors the starting process of the engine through a sensor or a control unit, and when the engine reaches a stable running state, it indicates that the starting is successful. After confirming that the engine is successfully started, the system adjusts the resistance value of the variable resistance element to 0.

[0050] In some alternative embodiments, the step S201 of calculating the starting resistance value according to the demand voltage comprises a step S2011 of obtaining a starting current; and calculating the ratio of the demand voltage and the starting current to obtain the starting resistance value. By accurately calculating the starting resistance value, the voltage at the end of the generator controller can be accurately raised to the demand voltage during the starting process, avoiding damage to the engine and other components of the system caused by excessive voltage.

[0051] In the specific implementation process, the demand voltage is the voltage value that the generator controller needs to reach during the engine starting process, to ensure that the engine can be started smoothly, while avoiding excessive shaft voltage causing electrical corrosion to the engine crankshaft bearing. The starting current refers to the maximum instantaneous current supplied to the engine and the generator controller through the circuit at the moment of engine starting. Obtaining this current value is crucial for calculating the starting resistance value. By dividing the demand voltage by the starting current, the starting resistance value, i.e., the resistance value that the variable resistance element should have during the engine starting process, can be calculated. This calculation ensures that the voltage at the end of the generator controller can be stably raised to the demand voltage when the starting current passes through, while limiting the generation of shaft voltage. The starting current may vary due to factors such as engine type, battery state, and environmental temperature, so an algorithm or circuit can be designed to dynamically obtain the starting current to improve the accuracy of the resistance value calculation. The demand voltage can be adjusted according to the characteristics of the engine and the generator controller, as well as the system requirements, to achieve the best starting effect. For example, when the environmental temperature is low, the demand voltage can be appropriately increased to improve the starting performance of the engine.

[0052] In some optional embodiments, the engine comprises a starter, and the method further comprises a step S208 of controlling the starter to start the engine in the case that the bus voltage is not equal to the demand voltage. By adding a starter start as a backup solution, the engine can be started when the bus voltage does not meet the demand voltage, effectively improving the reliability and success rate of engine start.

[0053] Specifically, the engine system includes a starter, which is a device used to provide external power when the engine cannot start by itself, usually for cold start or in the case of abnormal engine start. The system continuously monitors the bus voltage of the generator controller and compares it with the preset demand voltage. If the bus voltage fails to reach the demand voltage, it may indicate that there is a voltage shortage during the engine start process, which is not enough to smoothly start the engine or meet the voltage demand during start. When it is detected that the bus voltage is not equal to the demand voltage, the system will automatically control the starter to start the engine to provide additional starting power and ensure the success rate of engine start. The use of the starter can serve as a supplementary starting method, especially when the generator starting method cannot meet the starting voltage demand. When controlling the starter to start the engine, the starting process can be further optimized, such as dynamically adjusting the starting torque of the starter, monitoring the temperature and current of the starter to avoid overload, or performing rapid recovery and cooling of the starter after starting to prolong its service life.

[0054] In some optional embodiments, the above step S201 further comprises a step S2012 of obtaining the demand voltage in the case that a generator start demand is received, wherein the generator start demand represents a demand to start the engine using the generator. This method can provide the most suitable starting voltage by intelligently judging the generator start demand and accurately obtaining the demand voltage, avoiding the influence of excessively high or low voltage on the starting efficiency and stability of the engine.

[0055] Specifically, the system determines whether to use the generator to start the engine by receiving signals from the driver, the vehicle control unit or other systems. This signal can be a start button pressed by the driver, a start instruction issued by the vehicle's self-checking system, or a start demand automatically triggered based on the vehicle's operating mode. Once the system confirms that the generator is needed to start the engine, the next step is to obtain the demand voltage. The demand voltage is the voltage level set by the system to ensure the smooth start of the engine by the generator and the safety and efficiency of the starting process. This voltage level should take into account the starting characteristics of the engine, the power output capability of the generator and the overall electrical energy demand of the system.

[0056] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the implementation process of the hybrid vehicle starting method of the present application will be described in detail below with reference to specific embodiments.

[0057] This embodiment relates to an optimized generator controller power supply circuit schematic diagram, such as Figure 5 As shown, the power battery 5 and the generator controller 4 are connected via two circuits. The first circuit is composed of an electronically controlled rheostat 12 and a main positive contactor 8 connected in series. The first circuit includes a main negative contactor 10. The generator controller 4 and the generator 3 are connected by a high-voltage line.

[0058] This embodiment also relates to a specific method for starting a hybrid vehicle, such as Figure 6 As shown, the following steps are included:

[0059] Step S1: The vehicle has a high voltage requirement, and the power supply circuit is controlled to complete the high voltage process;

[0060] Step S2: The range extender has a generator start-up engine demand, and controls the variable resistor to a certain value;

[0061] Step S3: Determine whether the actual U_mcu_act (bus voltage) at the bus terminal of the engine controller is equal to U_mcu_des (demand voltage). If yes, execute step S4; if not, execute step S5.

[0062] Step S4: Control the generator to start the engine. After the engine starts successfully, control the variable resistor key to 0;

[0063] Step S5: Start the engine using the starter.

[0064] The embodiments of the present application also provide a starting device for a hybrid vehicle. It should be noted that the starting device for a hybrid vehicle of the embodiments of the present application can be used to execute the starting device for a hybrid vehicle provided in the embodiments of the present application. The device is used to implement the above-mentioned embodiments and preferred embodiments, and the details that have been explained will not be repeated here. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and conceivable.

[0065] The following introduces the starting device of the hybrid vehicle provided in the embodiment of the present application.

[0066] Figure 7is a schematic diagram of a starting device of a hybrid vehicle according to an embodiment of the present application, the hybrid vehicle comprising at least a power battery, a generator controller, a generator and an engine, the power battery being electrically connected to the generator controller through at least a first circuit, the first circuit being composed of a variable resistance element and a positive switch element connected in series, the positive switch element being used to control the output current of the positive pole of the power battery. As shown in Figure 3 The device comprises:

[0067] a first control unit 11, configured to obtain a required voltage, calculate a starting resistance value according to the required voltage, and control the resistance value of the variable resistance element to be the starting resistance value, wherein the required voltage represents a voltage for starting the engine by the generator;

[0068] Specifically, before starting the engine, the system needs to obtain the optimal voltage level required for starting the engine, i.e., the required voltage. This voltage level can be determined by the specifications of the engine, the current working state and the characteristics of the generator controller. According to the obtained required voltage, the system calculates the resistance value of the variable resistance element that can adjust the voltage at the end of the generator controller to the required voltage through a preset mathematical model or algorithm, and this resistance value is defined as the starting resistance value. Before starting the engine, the system adjusts the resistance value of the variable resistance element to the starting resistance value calculated above, so as to ensure that the voltage at the end of the generator controller is maintained at the required voltage level, thereby reducing the shaft voltage during the starting process of the engine and avoiding bearing electric corrosion and lubricating oil cracking. The variable resistance element can be an electrically controlled variable resistor, and the positive switch element can be a main positive contactor.

[0069] a second control unit 20, configured to detect the bus voltage of the generator controller, and control the generator to start the engine when the bus voltage is equal to the required voltage.

[0070] Specifically, before starting the engine, the voltage detection module in the system will monitor the bus voltage of the generator controller in real time. The bus voltage is the main voltage reference point of the power supply circuit inside the generator controller, and is directly related to the stability and efficiency of the system. According to the starting characteristics of the engine, the generator capacity and the safety requirements of the system, a required voltage, i.e., a stable voltage value that is expected to be maintained during the starting process of the engine, is preset or dynamically calculated. This value is set to reduce the shaft voltage during the starting process and prevent bearing electric corrosion and lubricating oil cracking. When the detected bus voltage is consistent with the preset required voltage, the system triggers the process of starting the engine by the generator through a control circuit or software instruction. This process ensures that the engine is started under optimal voltage conditions, thereby improving the starting efficiency and safety.

[0071] By the embodiment, by setting the variable resistance element in the loop of the positive switching element of the power battery and the generator controller, and controlling the resistance value of the variable resistance element to be the starting resistance value in the starting process, and in the case that the bus voltage is equal to the required voltage, the engine is started by the generator. In the prior art, when the engine of the hybrid vehicle is started, the shaft voltage is too high, which causes the bearing damage and even the engine damage. The application sets the series connection loop of the variable resistance element and the positive switching element, and adjusts the voltage between the power battery and the generator controller in real time through the variable resistance element, to avoid the problem of too high shaft voltage when the engine is started. Therefore, the problem of engine damage caused by too high shaft voltage when the engine is started in the prior art can be solved, and the effects of reducing the shaft voltage when the engine is started and protecting the engine are achieved.

[0072] In the specific implementation process, the power battery is also electrically connected with the generator controller through a second circuit, the second circuit is connected with the first circuit in parallel, the second circuit includes a negative switching element, and the negative switching element is used to control the negative output current of the power battery. The device further includes a third control unit, a fourth control unit and a fifth control unit. The third control unit is used to control the negative switching element to be closed in the case that a high-voltage power-on signal is received, wherein the high-voltage power-on signal indicates that the hybrid vehicle is started under high-voltage power-on. The fourth control unit is used to control the resistance value of the variable resistance element to be a high-voltage resistance value, wherein the high-voltage resistance value represents the resistance value corresponding to the high-voltage power-on start of the hybrid vehicle. The fifth control unit is used to control the positive switching element to be closed. The device avoids unnecessary energy loss by accurately controlling the power-on process, which helps to improve the energy utilization efficiency of the entire hybrid power system.

[0073] Specifically, the power battery directly supplies power to the generator controller through the first circuit, and the second circuit is connected in parallel with the first circuit, wherein the second circuit comprises a negative switch element for controlling a current path from the negative electrode of the power battery to the generator controller. The high-voltage power-on control process is as follows: when the hybrid vehicle is started with high-voltage power-on, the system first receives a high-voltage power-on signal, and then controls the negative switch element to be closed according to the signal: this step allows the current to flow from the negative electrode of the power battery to the generator controller, and prepares the power supply path for the starting process. The resistance value of the variable resistance element is controlled to be a high-voltage resistance value: the system calculates or sets a high-voltage resistance value in advance according to the high-voltage power-on starting characteristics of the hybrid vehicle, and adjusts the variable resistance element to the value to control the voltage rising process at the end of the generator controller, so as to avoid the risk of overvoltage. After the negative switch element is closed and the variable resistance element is adjusted to the high-voltage resistance value, the system controls the positive switch element to be closed, and the high-voltage power-on process of the power battery to the generator controller is completed. By closing the negative switch element and controlling the variable resistance element in advance, it can be ensured that the voltage at the end of the generator controller gradually rises to a safe level during the high-voltage power-on process, thereby avoiding the damage of instantaneous high-voltage impact to the system. The pre-set high-voltage resistance value can ensure that the voltage of the generator controller reaches the optimal starting condition during the starting process, thereby improving the starting efficiency and success rate. By precisely controlling the power-on process, unnecessary energy loss is avoided, which helps to improve the energy utilization efficiency of the entire hybrid power system. The negative switch element can be a main negative contactor.

[0074] In some optional embodiments, after controlling the positive switch element to be closed, the device further comprises a sixth control unit for detecting the bus voltage of the generator controller, and controlling the resistance value of the variable resistance element to be 0 when the bus voltage is greater than or equal to a pre-set voltage. Through the above steps, the device can ensure that the engine and the generator controller operate at a stable and efficient voltage, thereby reducing energy loss, prolonging the service life of the system, and improving the overall performance.

[0075] Specifically, after the engine is started and runs to a stable state, the system continuously monitors the bus voltage of the generator controller, which is an important indicator of the power supply state of the internal circuit of the generator controller. A threshold voltage is set, which is based on the normal operating conditions and safety standards of the engine and the generator controller, and is used to determine whether the bus voltage has reached a suitable level for stable power supply. Once it is detected that the bus voltage reaches or exceeds the pre-set voltage, the system instructs the resistance value of the variable resistance element to be adjusted to 0. This operation is equivalent to removing the resistance element in the power supply circuit, realizing that the generator controller directly obtains the voltage from the power battery, and ensuring stable and efficient power supply.

[0076] In some alternative embodiments, the device further comprises a seventh control unit for controlling the resistance value of the variable resistance element to be 0 after the engine starts successfully. Through the above steps, the device minimizes the influence of the variable resistance element on the circuit in the stable power supply state, ensures that the generator controller can directly obtain the maximum efficiency voltage supply from the power battery, and also reduces the energy loss on the resistance.

[0077] In the specific implementation process, after the engine starts successfully, the variable resistance element is controlled to gradually become 0 again, and the generator controller bus end voltage is restored to the normal value. The system monitors the engine starting process through sensors or control units, and when the engine reaches a stable running state, it indicates that the starting is successful. After confirming that the engine starts successfully, the system adjusts the resistance value of the variable resistance element to 0.

[0078] In some alternative embodiments, the first control unit comprises a first acquisition module and a calculation module. The first acquisition module is used to acquire the starting current, and the calculation module is used to calculate the ratio of the required voltage and the starting current to obtain the starting resistance value. By accurately calculating the starting resistance value, the generator controller end voltage can be accurately raised to the required voltage during the starting process, avoiding damage to the engine and other components of the system caused by excessive voltage.

[0079] In the specific implementation process, the required voltage is the voltage value that the generator controller needs to reach during the engine starting process, to ensure that the engine can start smoothly, while avoiding excessive shaft voltage causing electrical corrosion to the engine crankshaft bearing. The starting current refers to the maximum instantaneous current supplied to the engine and the generator controller through the circuit at the moment of engine starting. Obtaining this current value is crucial for calculating the starting resistance value. By dividing the required voltage by the starting current, the starting resistance value, i.e. the resistance value that the variable resistance element should have during the engine starting process, can be calculated. This calculation ensures that the voltage at the generator controller end can be stably raised to the required voltage when the starting current passes through, while limiting the generation of shaft voltage. The starting current may vary due to factors such as engine type, battery state, environmental temperature, etc., so an algorithm or circuit can be designed to dynamically obtain the starting current to improve the accuracy of resistance value calculation. The required voltage can be adjusted according to the characteristics of the engine and the generator controller, as well as system requirements, to achieve the best starting effect. For example, when the environmental temperature is low, the required voltage can be appropriately increased to improve the starting performance of the engine.

[0080] In some optional embodiments, the engine comprises a starter, and the device further comprises an eighth control unit configured to control the starter to start the engine when the bus voltage is not equal to the demand voltage. By adding the starter starting as a backup solution, the engine can be started when the bus voltage does not meet the demand voltage, effectively improving the reliability and success rate of engine starting.

[0081] Specifically, the engine system includes a starter, which is a device used to provide external power when the engine cannot start by itself, usually for cold starting or in the case of engine failure to start normally. The system continuously monitors the bus voltage of the generator controller and compares it with the preset demand voltage. If the bus voltage fails to reach the demand voltage, it may indicate that there is a voltage shortage during the engine starting process, which is not enough to start the engine smoothly or meet the voltage demand during starting. When it is detected that the bus voltage is not equal to the demand voltage, the system will automatically control the starter to start the engine to provide additional starting power and ensure the success rate of engine starting. The use of the starter can serve as a supplementary starting method, especially when the generator starting method cannot meet the starting voltage demand. When controlling the starter to start the engine, the starting process can be further optimized, such as dynamically adjusting the starting torque of the starter, monitoring the temperature and current of the starter to avoid overload, or performing rapid recovery and cooling of the starter after starting to prolong its service life.

[0082] In some optional embodiments, the first control unit further comprises a second acquisition module configured to acquire the demand voltage when a generator starting demand is received, wherein the generator starting demand represents a demand to start the engine using the generator. This device can provide the most suitable starting voltage by intelligently judging the generator starting demand and accurately acquiring the demand voltage, avoiding the influence of excessively high or low voltage on the starting efficiency and stability of the engine.

[0083] Specifically, the system determines whether to use the generator to start the engine by receiving signals from the driver, the vehicle control unit or other systems. This signal can be the starting button pressed by the driver, the starting instruction issued by the vehicle self-checking system, or the starting demand triggered automatically based on the vehicle operating mode. Once the system confirms that the generator is needed to start the engine, the next step is to acquire the demand voltage. The demand voltage is the voltage level set by the system to ensure the smooth starting of the engine by the generator and the safety and efficiency of the starting process. This voltage level should take into account the starting characteristics of the engine, the power output capability of the generator and the overall electrical energy demand of the system.

[0084] The starting device of the hybrid vehicle comprises a processor and a memory, and the first control unit, the second control unit and the like are stored in the memory as program units, and the corresponding functions are realized by executing the program units stored in the memory by the processor.

[0085] The processor comprises a core, and the core calls the corresponding program units in the memory.

[0086] The memory can comprise a non-permanent memory in a computer readable medium, a random access memory (RAM) and / or a non-volatile memory such as a read-only memory (ROM) or a flash memory (flash RAM), and the memory comprises at least one memory chip.

[0087] The embodiment of the application provides a computer readable storage medium comprising a stored program, wherein the computer readable storage medium controls a device where the computer readable storage medium is located to execute the starting method of the hybrid vehicle when the program runs.

[0088] Specifically, the starting method of the hybrid vehicle comprises:

[0089] In step S201, a demand voltage is acquired, a starting resistance value is calculated according to the demand voltage, and the resistance value of the variable resistance element is controlled to be the starting resistance value, wherein the demand voltage represents a voltage for starting the engine by the generator.

[0090] Specifically, before starting the engine, the system needs to acquire an optimal voltage level required for starting the engine, i.e., a demand voltage. The voltage level can be determined by the specifications of the engine, the current working state and the characteristics of the generator controller. According to the acquired demand voltage, the system calculates the resistance value of the variable resistance element that can adjust the voltage at the end of the generator controller to the demand voltage by a preset mathematical model or algorithm, and the resistance value is defined as the starting resistance value. Before starting the engine, the system adjusts the resistance value of the variable resistance element to the starting resistance value calculated above, so that the voltage at the end of the generator controller is maintained at the demand voltage level, thereby reducing the shaft voltage during the starting process of the engine and avoiding bearing electric corrosion and lubricating oil cracking. The variable resistance element can be an electrically controlled variable resistor, and the positive switch element can be a main positive contactor.

[0091] In step S202, the bus voltage of the generator controller is detected, and in the case that the bus voltage is equal to the demand voltage, the generator is controlled to start the engine.

[0092] Specifically, before starting the engine, the system's voltage detection module monitors the generator controller's bus voltage in real time. Bus voltage is the primary voltage reference point for the generator controller's internal power supply circuits and is directly related to system stability and efficiency. Based on the engine's starting characteristics, generator capacity, and system safety requirements, a desired voltage is preset or dynamically calculated—the desired stable voltage value to be maintained during engine startup. This value is set to reduce shaft voltage during startup to prevent electrical corrosion of bearings and cracking of the lubricating oil. When the detected bus voltage matches the preset desired voltage, the system triggers the generator to start the engine through control circuitry or software instructions. This process ensures that the engine is started under optimal voltage conditions, thereby improving startup efficiency and safety.

[0093] An embodiment of the present invention provides an electronic device, including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, at least the following steps are performed:

[0094] Step S201, obtaining a required voltage, calculating a starting resistance value according to the required voltage, and controlling the resistance value of the variable resistor element to be the starting resistance value, wherein the required voltage represents a voltage for the generator to start the engine;

[0095] Specifically, before starting the engine, the system needs to obtain the optimal voltage level required for engine starting, that is, the required voltage. This voltage level can be determined by the engine specifications, the current operating status, and the characteristics of the generator controller. Based on the obtained required voltage, the system calculates the resistance value of the variable resistor element that can adjust the generator controller terminal voltage to the required voltage through a preset mathematical model or algorithm. This resistance value is defined as the starting resistance value. Before the engine starts, the system will adjust the resistance value of the variable resistor element to the above-calculated starting resistance value to ensure that the generator controller terminal voltage is maintained at the required voltage level, thereby reducing the shaft voltage during the engine starting process and avoiding electrical corrosion of the bearings and cracking of the lubricating oil. The variable resistor element can be an electronically controlled rheostat, and the positive switch element can be a main positive contactor.

[0096] Step S202 : detecting the bus voltage of the generator controller, and controlling the generator to start the engine when the bus voltage is equal to the required voltage.

[0097] Specifically, before starting the engine, the voltage detection module in the system will monitor the bus voltage of the generator controller in real time. The bus voltage is the main voltage reference point of the power supply circuit inside the generator controller, and is directly related to the stability and efficiency of the system. According to the starting characteristics of the engine, the generator capacity and the safety requirements of the system, a required voltage is preset or dynamically calculated, which is the stable voltage value that is expected to be maintained during the engine starting process. The setting of this value is to reduce the shaft voltage during the starting process and prevent bearing electric corrosion and lubricating oil cracking. When the detected bus voltage is consistent with the preset required voltage, the system triggers the process of starting the engine by the generator through the control circuit or software instruction. This process ensures that the engine is started under the best voltage conditions, thereby improving the starting efficiency and safety.

[0098] The device herein can be a server, a PC, a PAD, a mobile phone, etc.

[0099] The application also provides a computer program product comprising a computer program which, when executed by a processor, implements the steps of the method described in various embodiments of the application:

[0100] Step S201, obtaining a required voltage, calculating a starting resistance value according to the required voltage, and controlling the resistance value of the variable resistance element to be the starting resistance value, wherein the required voltage represents the voltage for the generator to start the engine;

[0101] Specifically, before starting the engine, the system needs to obtain the optimal voltage level required for the engine to start, i.e. the required voltage. This voltage level can be determined by the specifications of the engine, the current working state and the characteristics of the generator controller. According to the obtained required voltage, the system calculates the resistance value of the variable resistance element that can adjust the voltage at the end of the generator controller to the required voltage through a preset mathematical model or algorithm, which is defined as the starting resistance value. Before the engine starts, the system adjusts the resistance value of the variable resistance element to the starting resistance value calculated above, ensuring that the voltage at the end of the generator controller is maintained at the required voltage level, thereby reducing the shaft voltage during the engine starting process and avoiding bearing electric corrosion and lubricating oil cracking. The variable resistance element can be an electrically controlled variable resistor, and the positive switching element can be a main positive contactor.

[0102] Step S202, detecting the bus voltage of the generator controller, and in the case that the bus voltage is equal to the required voltage, controlling the generator to start the engine.

[0103] Specifically, before starting the engine, the voltage detection module in the system will monitor the bus voltage of the generator controller in real time. The bus voltage is the main voltage reference point of the power supply circuit inside the generator controller, and is directly related to the stability and efficiency of the system. According to the starting characteristics of the engine, the generator capacity and the safety requirements of the system, a required voltage is preset or dynamically calculated, which is the stable voltage value that is expected to be maintained during the engine starting process. The setting of this value is to reduce the shaft voltage during the starting process and prevent bearing electric corrosion and lubricating oil cracking. When the detected bus voltage is consistent with the preset required voltage, the system triggers the process of starting the engine by the generator through the control circuit or software instruction. This process ensures that the engine is started under the best voltage conditions, thereby improving the starting efficiency and safety.

[0104] It is apparent that those skilled in the art will recognize that the modules or steps of the present application described above can be implemented using general computing devices, which can be centralized on a single computing device or distributed on a network composed of multiple computing devices, and can be implemented using program codes executable by the computing devices, so that they can be stored in storage devices and executed by the computing devices, and in some cases, the steps shown or described can be executed in different order, or they can be made into individual integrated circuit modules, or multiple modules or steps can be made into a single integrated circuit module. Thus, the present application is not limited to any particular combination of hardware and software.

[0105] Those skilled in the art will appreciate that embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage, etc.) containing computer-usable program code.

[0106] The present application is described with reference to flowcharts and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing apparatus produce a means for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 The means for implementing each flow or multiple flows and / or blocks Figure 1 The means for implementing each flow or multiple flows and / or blocks

[0107] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the Figure 1 function specified in the flow or flows and / or blocks Figure 1 of the block or blocks.

[0108] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the Figure 1 function specified in the flow or flows and / or blocks Figure 1 of the block or blocks.

[0109] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0110] The memory can include non-persistent memory and / or volatile memory, such as a random access memory (RAM) including a cache area for the temporary storage of data. The memory can also include non-volatile memory, such as read only memory (ROM), electrically programmable read only memory (EPROM), electrically erasable programmable read only memory (EEPROM), flash memory, or non-volatile random access memory (NVRAM), for the storage of information, such as data files or program

[0111] Computer readable media includes permanent and non-permanent, removable and non-removable media implemented in any method or technology for the storage of information. The information can be computer readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), electrically erasable programmable read only memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital versatile discs (DVDs) or other optical storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible to a computing device. According to the definition herein, computer readable media does not include transitory media, such as modulated data signals and carrier waves.

[0112] It is also to be noted that the terms "comprising", "comprises" or "comprised of" as used herein are synonymous with "including", "includes" or "containing", "contains", and are inclusive or open-ended and do not exclude additional, unrecited elements or method steps.

[0113] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0114] 1) In the starting method of the hybrid vehicle of the present application, a variable resistance element is arranged in the loop of the power battery and the positive switch element of the generator controller, the resistance value of the variable resistance element is controlled to be a starting resistance value during the starting process, and the engine is started by the generator when the bus voltage is equal to the required voltage. In the prior art, the shaft voltage is too high when the engine of the hybrid vehicle is started, which causes bearing damage and even engine damage. The series connection loop of the variable resistance element and the positive switch element is arranged in the present application, the voltage between the power battery and the generator controller is adjusted in real time by the variable resistance element, and the problem of too high shaft voltage when the engine is started is avoided. Therefore, the problem of engine damage caused by too high shaft voltage when the engine is started in the prior art is solved, and the effects of reducing the shaft voltage when the engine is started and protecting the engine are achieved.

[0115] 2) In the starting device of the hybrid vehicle of the present application, a variable resistance element is arranged in the loop of the power battery and the positive switch element of the generator controller, the resistance value of the variable resistance element is controlled to be a starting resistance value during the starting process, and the engine is started by the generator when the bus voltage is equal to the required voltage. In the prior art, the shaft voltage is too high when the engine of the hybrid vehicle is started, which causes bearing damage and even engine damage. The series connection loop of the variable resistance element and the positive switch element is arranged in the present application, the voltage between the power battery and the generator controller is adjusted in real time by the variable resistance element, and the problem of too high shaft voltage when the engine is started is avoided. Therefore, the problem of engine damage caused by too high shaft voltage when the engine is started in the prior art is solved, and the effects of reducing the shaft voltage when the engine is started and protecting the engine are achieved.

[0116] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various changes and modifications to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A starting method of a hybrid vehicle, characterized by, The hybrid vehicle at least includes a power battery, a generator controller, a generator and an engine, the power battery is electrically connected with the generator controller at least through a first circuit, the first circuit is composed of a variable resistance element and a positive switch element connected in series, the positive switch element is used for controlling the positive output current of the power battery, and a starting method of the hybrid vehicle comprises the following steps of: obtaining a demand voltage, calculating a starting resistance value according to the demand voltage, and controlling the resistance value of the variable resistance element to be the starting resistance value, wherein the demand voltage represents a voltage for starting the engine by the generator; detecting a bus voltage of the generator controller, and controlling the generator to start the engine in the case that the bus voltage is equal to the demand voltage.

2. The starting method of a hybrid vehicle according to claim 1, characterized by, The power battery is also electrically connected with the generator controller through a second circuit, the second circuit is connected in parallel with the first circuit, the second circuit comprises a negative switch element, the negative switch element is used for controlling the negative output current of the power battery, and before obtaining the demand voltage, the method further comprises the following steps of: controlling the negative switch element to be closed in the case that a high-voltage power-on signal is received, wherein the high-voltage power-on signal represents a high-voltage power-on start of the hybrid vehicle; controlling the resistance value of the variable resistance element to be a high-voltage resistance value, wherein the high-voltage resistance value represents a resistance value corresponding to the high-voltage power-on start of the hybrid vehicle; controlling the positive switch element to be closed.

3. The starting method of a hybrid vehicle according to claim 2, characterized by, After controlling the positive switch element to be closed, the method further comprises the following steps of: detecting the bus voltage of the generator controller, and controlling the resistance value of the variable resistance element to be 0 in the case that the bus voltage is greater than or equal to a preset voltage.

4. The starting method of a hybrid vehicle according to claim 1, characterized by After controlling the generator to start the engine, the method further comprises the following steps of: controlling the resistance value of the variable resistance element to be 0 after the engine is successfully started.

5. The starting method of a hybrid vehicle according to claim 1, characterized by According to the demand voltage, the starting resistance value is calculated, comprising the following steps of: obtaining a starting current; calculating the ratio of the demand voltage and the starting current to obtain the starting resistance value.

6. The starting method of a hybrid vehicle according to claim 1, characterized by The engine comprises a starter, and the method further comprises the following steps of: controlling the starter to start the engine in the case that the bus voltage is not equal to the demand voltage.

7. The starting method of a hybrid vehicle according to claim 1, characterized by The demand voltage is obtained, comprising the following steps of: obtaining the demand voltage in the case that a generator starting demand is received, wherein the generator starting demand represents a demand for starting the engine by the generator.

8. A starting device of a hybrid vehicle characterized by comprising: The hybrid vehicle at least includes a power battery, a generator controller, a generator and an engine, the power battery is electrically connected with the generator controller at least through a first circuit, the first circuit is composed of a variable resistance element and a positive switch element connected in series, the positive switch element is used for controlling the positive output current of the power battery, and a starting device of the hybrid vehicle comprises the following steps of: a first control unit is used for obtaining a demand voltage, calculating a starting resistance value according to the demand voltage, and controlling the resistance value of the variable resistance element to be the starting resistance value, wherein the demand voltage represents a voltage for starting the engine by the generator; A second control unit is configured to detect a bus voltage of the generator controller, and control the generator to start the engine when the bus voltage is equal to the required voltage.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium includes a stored program, wherein the program, when executed, controls a device in which the computer readable storage medium is located to perform the method for starting the hybrid vehicle according to any one of claims 1 to 7.

10. A hybrid vehicle characterized by comprising: Comprise: A power battery, a generator controller, a generator and an engine, the power battery is electrically connected with the generator controller through a first circuit, the first circuit is composed of a variable resistance element and a positive switch element connected in series, the positive switch element is used for controlling the positive output current of the power battery, the engine comprises a starter, the starter and the generator are used for controlling the start of the engine, the power battery is also electrically connected with the generator controller through a second circuit, the second circuit is connected in parallel with the first circuit, the second circuit comprises a negative switch element, and the negative switch element is used for controlling the negative output current of the power battery. One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs comprise a program for performing the method for starting the hybrid vehicle according to any one of claims 1 to 7.

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