Starting method and device of hybrid power vehicle and hybrid power vehicle

Abstract

The invention provides a starting method and device of a hybrid power vehicle and the hybrid power vehicle. The hybrid power 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 at least through a first circuit, the first circuit is formed by connecting a variable resistance element and a positive switch element in series, and the positive switch element is used for controlling positive electrode output current of the power battery; the starting method of the hybrid vehicle comprises the steps that required voltage is obtained, a starting resistance value is calculated according to the required voltage, the resistance value of a variable resistance element is controlled to be the starting resistance value, and the required voltage represents the voltage enabling a generator to start an engine; and 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. Through the application, the problem that the engine is damaged due to overhigh shaft voltage when the engine is started in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle startup control, and in particular, to a startup method and device for a hybrid vehicle, a computer-readable storage medium, and a hybrid vehicle. Background Art

[0002] The range extender system mainly includes two key components: the engine and the generator. The connection between the engine and the generator can be an integrated type, that is, the generator is directly connected to the engine crankshaft end without a transition connector; the connection between the engine and the generator can also add an elastic coupling between the engine flywheel end and the generator as a transition connector; however, in the integrated connection method and the elastic coupling (non-insulating material) connection, the generator generates shaft voltage during the operation of the range extender, and the shaft voltage will be directly transmitted to the engine crankshaft bearing end. The increase in shaft voltage and the resulting shaft current will cause electrical corrosion of the bearing, cracking of the lubricating oil, etc., resulting in abnormalities of a single bearing, and even engine damage. Through experimental analysis, the generation of shaft voltage is closely related to the voltage platform. The larger the voltage platform, the easier it is to generate shaft voltage. In addition, the shaft voltage is higher when the generator reverses to start the engine.

[0003] Therefore, in the extended-range hybrid system, when the engine is connected to the generator directly or through a non-insulated coupling, the engine start-up (especially the reverse start of the engine by the generator) will cause the shaft voltage generated by the generator to be transmitted to the engine bearings, resulting in electrical corrosion of the bearings and cracking of the lubricating oil, which may cause bearing abnormalities or engine damage. Summary of the invention

[0004] The main purpose of the present application is to provide a hybrid vehicle starting method, device, computer-readable storage medium and hybrid vehicle, so as to at least solve the problem in the prior art that the shaft voltage is too high when the engine is started, causing engine damage.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a method for starting a hybrid vehicle is provided, wherein the hybrid vehicle comprises at least a power battery, a generator controller, a generator and an engine, wherein the power battery is electrically connected to the generator controller via at least a first circuit, wherein the first circuit is composed of a variable resistance element and a positive switch element connected in series, wherein the positive switch element is used to control the positive output current of the power battery, and the method for starting the hybrid vehicle comprises: 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 at which the generator starts the engine; 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.

[0006] Optionally, 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 electrode output current of the power battery. Before obtaining the required voltage, the method also includes: upon receiving a high-voltage power-on signal, controlling the negative switch element to close, 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 the resistance value corresponding to the high-voltage power-on start of the hybrid vehicle; and controlling the positive switch element to close.

[0007] Optionally, after controlling the positive switch element to close, the method further includes: 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.

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

[0009] Optionally, calculating the starting resistance value according to the required voltage includes: acquiring a starting current; and calculating a ratio of the required voltage to the starting current to obtain the starting resistance value.

[0010] Optionally, the engine includes a starter, and the method further includes: when the bus voltage is not equal to the required voltage, controlling the starter to start the engine.

[0011] Optionally, obtaining the required voltage includes: obtaining the required voltage in case of receiving a generator starting requirement, wherein the generator starting requirement indicates a requirement to start the engine using the generator.

[0012] According to another aspect of the present application, a starting device for a hybrid vehicle is provided, 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 via 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 positive output current of the power battery, the starting device for the hybrid vehicle comprising: a first control unit, for 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 at which the generator starts the engine; a second control unit, for 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.

[0013] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute any one of the methods for starting a hybrid vehicle.

[0014] According to another aspect of the present application, a hybrid vehicle is provided, comprising: a power battery, a generator controller, a generator and an engine, wherein the power battery is electrically connected to the generator controller via 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 positive output current of the power battery, the engine comprising a starter, the starter and the generator being used to control the starting of the engine, the power battery being also electrically connected to the generator controller via a second circuit, the second circuit being connected in parallel with the first circuit, the second circuit comprising a negative switch element, the negative switch element being used to control 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 are configured to be executed by the one or more processors, the one or more programs comprising a method for executing any one of the starting methods of the hybrid vehicle.

[0015] The technical solution of the present application is applied, by setting a variable resistance element in the circuit between the power battery and the positive switch element of the generator controller, and controlling the resistance value of the variable resistance element to the starting resistance value during the starting process, and starting the engine through the generator when the bus voltage is equal to the required voltage. Compared with the prior art, when the engine of a hybrid vehicle is started, the shaft voltage is too high, causing bearing damage or even engine damage. The present application sets a series connection circuit of a variable resistance element and a positive switch element, and uses a variable resistance element to adjust the voltage between the power battery and the generator controller in real time to avoid the problem of excessive shaft voltage when the engine is started. Therefore, it can solve the problem of engine damage caused by excessive shaft voltage when the engine is started in the prior art, and achieve the effect of reducing the shaft voltage when the engine is started and protecting the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 A schematic structural diagram of a range-extended hybrid power system provided by an embodiment of the present application is shown;

[0018] Figure 2 A schematic diagram of a power supply circuit of a generator controller in the prior art provided by an embodiment of the present application is shown;

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

[0020] Figure 4 A schematic diagram showing a process flow of a method for starting a hybrid vehicle provided in an embodiment of the present application is shown;

[0021] Figure 5 A schematic diagram of an optimized generator controller power supply circuit provided by an embodiment of the present application is shown;

[0022] Figure 6 A schematic diagram showing a flow chart of a specific method for starting a hybrid vehicle provided in an embodiment of the present application;

[0023] Figure 7 A structural block diagram of a hybrid vehicle starting device provided in an embodiment of the present application is shown.

[0024] The above drawings include the following reference numerals:

[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. Electronically controlled rheostat; 102. Processor; 104. Memory; 106. Transmission equipment; 108. Input and output equipment. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] For the convenience of description, some nouns or terms involved in the embodiments of the present application are explained below:

[0030] Shaft voltage: The potential difference between the two ends of the shaft, the local part of the shaft and the shaft to the ground during the operation of the motor. If the connection 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, the engine 1, coupling 2 and generator system (generator 3 and generator controller 4) in the extended-range hybrid system are called a range extender. The connection between the engine 1 and the generator 3 can be Figure 1The coupling 2 in the embodiment may be omitted, and the rotor of the generator 3 is directly connected to the crankshaft output end of the engine 1. The hybrid system includes the remaining parts: a power battery 5, a drive motor 6 and a drive motor controller 7. The power battery 5 provides electric energy 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. The various 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 is to first control the closing of the main negative contactor 10, then control the closing of the pre-charge contactor 9, and when the terminal voltage of the generator controller 4 reaches about 90% of the bus terminal voltage of the power battery 5, control the closing of the main positive contactor 8 and disconnect the pre-charge contactor 9 at the same time. The disadvantage of the current power supply circuit is that the pre-charge resistor 11 is a fixed configuration, and the resistance value of the pre-charge resistor 11 cannot be adjusted in real time according to the bus voltage requirement 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. Engine starting (especially starting the engine by reverse dragging the generator) will cause the shaft voltage generated by the generator to be transmitted to the engine bearings, resulting in 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 excessive shaft voltage that cannot be adjusted, the embodiments of the present application provide a hybrid vehicle starting method, device, computer-readable storage medium and hybrid vehicle.

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with 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 block diagram of a mobile terminal of a method for 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 in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It can 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 fewer components as shown, or with Figure 3 Different configurations are shown.

[0036] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the method for starting a hybrid vehicle in the embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, the above method is implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the above 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 used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0037] In this embodiment, a method for starting a hybrid vehicle running on a mobile terminal, a computer terminal or a similar computing device is provided. 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 can be executed in an order different from that shown here.

[0038] Figure 4 The flowchart of the method for starting a hybrid vehicle according to an embodiment of the present application, wherein the hybrid vehicle comprises at least a power battery, a generator controller, a generator and an engine, wherein the power battery is electrically connected to the generator controller at least through a first circuit, wherein the first circuit is composed of a variable resistance element and a positive switch element connected in series, wherein the positive switch element is used to control the positive output current of the power battery. Figure 4 As shown, the method comprises 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 resistance 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 working status, and the characteristics of the generator controller. Based on the acquired 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 adjusts 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 to avoid electrical corrosion of the bearing 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 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, which is directly related to the stability and efficiency of the system. According to the starting characteristics of the engine, the generator capacity and the system safety requirements, a required voltage is preset or dynamically calculated, that is, the stable voltage value that is expected to be maintained during the engine starting process. This value is set to reduce the shaft voltage during the starting process to prevent electrical corrosion of the bearings and cracking of the lubricating oil. When the detected bus voltage is consistent with the preset required voltage, the system triggers the generator to start the engine through the control circuit or software instructions. This process ensures that the engine is started under the optimal voltage conditions, thereby improving the starting efficiency and safety.

[0043] Through this embodiment, by setting a variable resistance element in the circuit of the power battery and the positive switch element of the generator controller, and controlling the resistance value of the variable resistance element to the starting resistance value during the starting process, and when the bus voltage is equal to the required voltage, the engine is started by the generator. Compared with the prior art, when the engine of a hybrid vehicle is started, the shaft voltage is too high, causing bearing damage or even engine damage. The present application sets a series connection circuit of a variable resistance element and a positive switch element, and uses a variable resistance element to adjust the voltage between the power battery and the generator controller in real time to avoid the problem of excessive shaft voltage when the engine is started. Therefore, it can solve the problem of engine damage caused by excessive shaft voltage when the engine is started in the prior art, and achieve the effect of reducing the shaft voltage when the engine is started and protecting the engine.

[0044] In the specific 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 the above step S201, the method further includes: step S203: in the case of receiving a high-voltage power-on signal, controlling the negative switch element to close, wherein the high-voltage power-on signal indicates that the hybrid vehicle is powered on and started at high voltage; step S204: controlling the resistance value of the variable resistance element to be a high-voltage resistance value, wherein the high-voltage resistance value indicates the resistance value corresponding to the high-voltage power-on start of the hybrid vehicle; step S205: controlling the positive switch element to close. The method avoids unnecessary energy loss by accurately controlling the power-on process, and helps to improve the energy utilization efficiency of the entire hybrid 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, which includes a negative switch element for controlling the current path from the negative electrode of the power battery to the generator controller. High-voltage power-on control process: When the hybrid vehicle is powered on at high voltage, the system first receives a high-voltage power-on signal, and then controls the negative switch element to close according to the signal: This step allows the current from the negative electrode of the power battery to the generator controller to flow, preparing the power supply path for the starting process. Control the resistance value of the variable resistance element to be a high-voltage resistance value: The system pre-calculates or sets a high-voltage resistance value according to the high-voltage power-on starting characteristics of the hybrid vehicle, and adjusts the variable resistance element to this value to control the voltage rise process at the generator controller end to avoid overvoltage risks. 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 close to complete the high-voltage power-on process from the power battery to the generator controller. By closing the negative switch element and controlling the variable resistance element first, it can be ensured that during the high-voltage power-on process, the voltage at the generator controller end gradually rises to a safe level, avoiding damage to the system caused by instantaneous high-voltage shocks. The preset high-voltage resistance value can ensure that the voltage of the generator controller during the starting process reaches the optimal starting condition, thereby improving the starting efficiency and success rate. By accurately controlling the power-on process, unnecessary energy loss is avoided, which helps to improve the energy utilization efficiency of the entire hybrid system. The negative switch element can be a main negative contactor.

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

[0047] Specifically, after the engine starts 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 status 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 generator controller 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 command adjusts the resistance value of the variable resistor element to 0. This operation is equivalent to removing the resistor element in the power supply circuit, enabling the generator controller to obtain voltage directly from the power battery, ensuring stable and efficient power supply.

[0048] In some other optional implementations, after the generator is controlled to start the engine in step S202, the method further includes step S207: after the engine is successfully started, the resistance value of the variable resistance element is controlled to be 0. Through the above steps, the method minimizes the influence of the variable resistance element on the circuit under the stable power supply state, ensures that the generator controller can directly obtain the voltage supply with the maximum efficiency from the power battery, and also reduces the energy loss in the resistance.

[0049] In the specific implementation process, when the engine starts successfully, the variable resistance element is controlled to gradually become 0 again, and the voltage at the bus terminal of the generator controller is restored to a normal value. The system monitors the engine start process through a sensor or control unit. When the engine reaches a stable operating state, it indicates that the start is successful. After confirming that the engine has started successfully, the system will control the resistance value of the variable resistance element to 0.

[0050] In some optional implementations, the above step S201 calculates the starting resistance value according to the required voltage, including step S2011: obtaining the starting current; calculating the ratio of the required voltage to the starting current to obtain the starting resistance value. By accurately calculating the starting resistance value, it is possible to ensure that the voltage at the generator controller terminal rises accurately to the required voltage during the starting process, avoiding damage to the engine and other system components due to 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 start smoothly and avoid excessive shaft voltage causing electrical corrosion to the engine crankshaft bearing. The starting current refers to the maximum instantaneous current that powers the engine and 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 can be calculated, that is, the resistance value that the variable resistance element should have during the engine starting process. This calculation ensures that when the starting current passes, the voltage at the generator controller end can rise steadily to the required voltage while limiting the generation of shaft voltage. The starting current may vary due to factors such as engine type, battery status, and ambient temperature. Therefore, 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 generator controller, as well as system requirements, to achieve the best starting effect. For example, when the ambient 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 includes a starter, and the method further includes step S208: when the bus voltage is not equal to the required voltage, controlling the starter to start the engine. By adding the starter start as a backup solution, the engine can be started when the bus voltage does not meet the required voltage, effectively improving the reliability and success rate of engine starting.

[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 when the engine cannot start normally. The system continuously monitors the bus voltage of the generator controller and compares it with the preset required voltage. If the bus voltage fails to reach the required voltage, this may indicate that there is insufficient voltage during the engine starting process, which is not enough to start the engine smoothly or meet the voltage requirements at the time of starting. When it is detected that the bus voltage is not equal to the required 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 be used as a supplementary starting method, especially when the generator starting method cannot meet the starting voltage requirements. 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 quickly recovering and cooling the starter after starting to extend its service life.

[0054] In some optional implementations, the above step S201 further includes step S2012: upon receiving a generator start demand, obtaining the required voltage, wherein the generator start demand indicates a demand for using the generator to start the engine. The method can provide the most suitable starting voltage by intelligently judging the generator start demand and accurately obtaining the required voltage, thereby avoiding affecting the starting efficiency and stability of the engine due to excessively high or low voltage.

[0055] Specifically, the system determines whether the generator is needed 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 command issued by the vehicle's self-test 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 required voltage. The required voltage is the voltage level set by the system in order to enable the generator to start the engine smoothly and ensure safety and efficiency during the starting process. This voltage level should take into account the starting characteristics of the engine, the power output capacity of the generator, and the overall power 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 in conjunction with 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 no, execute step S5;

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

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

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

[0065] The following is an introduction to the starting device of a hybrid vehicle provided in an embodiment of the present application.

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

[0067] A first control unit 11 is used 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 the generator to start the engine;

[0068] 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 working status, and the characteristics of the generator controller. Based on the acquired 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 adjusts 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 to avoid electrical corrosion of the bearing 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.

[0069] The second control unit 20 is used 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, which is directly related to the stability and efficiency of the system. According to the starting characteristics of the engine, the generator capacity and the system safety requirements, a required voltage is preset or dynamically calculated, that is, the stable voltage value that is expected to be maintained during the engine starting process. This value is set to reduce the shaft voltage during the starting process to prevent electrical corrosion of the bearings and cracking of the lubricating oil. When the detected bus voltage is consistent with the preset required voltage, the system triggers the generator to start the engine through the control circuit or software instructions. This process ensures that the engine is started under the optimal voltage conditions, thereby improving the starting efficiency and safety.

[0071] Through this embodiment, by setting a variable resistance element in the circuit of the power battery and the positive switch element of the generator controller, and controlling the resistance value of the variable resistance element to the starting resistance value during the starting process, and when the bus voltage is equal to the required voltage, the engine is started by the generator. Compared with the prior art, when the engine of a hybrid vehicle is started, the shaft voltage is too high, causing bearing damage or even engine damage. The present application sets a series connection circuit of a variable resistance element and a positive switch element, and uses a variable resistance element to adjust the voltage between the power battery and the generator controller in real time to avoid the problem of excessive shaft voltage when the engine is started. Therefore, it can solve the problem of engine damage caused by excessive shaft voltage when the engine is started in the prior art, and achieve the effect of reducing the shaft voltage when the engine is started and protecting the engine.

[0072] In the specific 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, the negative switch element is used to control the negative output current of the power battery, the device also includes a third control unit, a fourth control unit and a fifth control unit, the third control unit is used to control the negative switch element to close when receiving a high-voltage power-on signal, wherein the high-voltage power-on signal indicates that the hybrid vehicle is powered on at high voltage; 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 indicates 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 switch element to close. 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 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, which includes a negative switch element for controlling the current path from the negative electrode of the power battery to the generator controller. High-voltage power-on control process: When the hybrid vehicle is powered on at high voltage, the system first receives a high-voltage power-on signal, and then controls the negative switch element to close according to the signal: This step allows the current from the negative electrode of the power battery to the generator controller to flow, preparing the power supply path for the starting process. Control the resistance value of the variable resistance element to be a high-voltage resistance value: The system pre-calculates or sets a high-voltage resistance value according to the high-voltage power-on starting characteristics of the hybrid vehicle, and adjusts the variable resistance element to this value to control the voltage rise process at the generator controller end to avoid overvoltage risks. 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 close to complete the high-voltage power-on process from the power battery to the generator controller. By closing the negative switch element and controlling the variable resistance element first, it can be ensured that during the high-voltage power-on process, the voltage at the generator controller end gradually rises to a safe level, avoiding damage to the system caused by instantaneous high-voltage shocks. The preset high-voltage resistance value can ensure that the voltage of the generator controller during the starting process reaches the optimal starting condition, thereby improving the starting efficiency and success rate. By accurately controlling the power-on process, unnecessary energy loss is avoided, which helps to improve the energy utilization efficiency of the entire hybrid system. The negative switch element can be a main negative contactor.

[0074] In some optional embodiments, after controlling the positive switch element to close, the device further includes a sixth control unit for detecting the bus voltage of the generator controller, and when the bus voltage is greater than or equal to a preset voltage, controlling the resistance value of the variable resistance element to be 0. Through the above steps, the device can ensure that the engine and the generator controller operate at a stable and efficient voltage, reduce energy loss, extend system life, and improve overall performance.

[0075] Specifically, after the engine starts 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 status 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 generator controller 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 command adjusts the resistance value of the variable resistor element to 0. This operation is equivalent to removing the resistor element in the power supply circuit, enabling the generator controller to obtain voltage directly from the power battery, ensuring stable and efficient power supply.

[0076] In some other optional embodiments, the device further includes a seventh control unit, which is used to control the resistance value of the variable resistance element to be 0 after the engine is successfully started. Through the above steps, the device minimizes the influence of the variable resistance element on the circuit under the stable power supply state, ensures that the generator controller can directly obtain the voltage supply with the maximum efficiency from the power battery, and also reduces the energy loss in the resistance.

[0077] In the specific implementation process, when the engine starts successfully, the variable resistance element is controlled to gradually become 0 again, and the voltage at the bus terminal of the generator controller is restored to a normal value. The system monitors the engine start process through a sensor or control unit. When the engine reaches a stable operating state, it indicates that the start is successful. After confirming that the engine has started successfully, the system will control the resistance value of the variable resistance element to 0.

[0078] In some optional embodiments, the first control unit includes a first acquisition module and a calculation module, the first acquisition module is used to obtain the starting current; 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, it is possible to ensure that the voltage at the generator controller terminal rises accurately to the required voltage during the starting process, avoiding damage to the engine and other system components caused by excessive voltage.

[0079] 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 start smoothly and avoid excessive shaft voltage causing electrical corrosion to the engine crankshaft bearing. The starting current refers to the maximum instantaneous current that powers the engine and 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 can be calculated, that is, the resistance value that the variable resistance element should have during the engine starting process. This calculation ensures that when the starting current passes, the voltage at the generator controller end can rise steadily to the required voltage while limiting the generation of shaft voltage. The starting current may vary due to factors such as engine type, battery status, and ambient temperature. Therefore, 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 generator controller, as well as system requirements, to achieve the best starting effect. For example, when the ambient temperature is low, the demand voltage can be appropriately increased to improve the starting performance of the engine.

[0080] In some optional embodiments, the engine includes a starter, and the device further includes an eighth control unit, which is used to control the starter to start the engine when the bus voltage is not equal to the required voltage. By adding the starter start as a backup solution, the engine can be started when the bus voltage does not meet the required voltage, which effectively improves 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 start or when the engine cannot start normally. The system continuously monitors the bus voltage of the generator controller and compares it with the preset required voltage. If the bus voltage fails to reach the required voltage, this may indicate that there is insufficient voltage during the engine starting process, which is not enough to start the engine smoothly or meet the voltage requirements at the time of starting. When it is detected that the bus voltage is not equal to the required 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 be used as a supplementary starting method, especially when the generator starting method cannot meet the starting voltage requirements. 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 quickly recovering and cooling the starter after starting to extend its service life.

[0082] In some optional embodiments, the first control unit further includes a second acquisition module, which is used to acquire the required voltage when receiving a generator start-up demand, wherein the generator start-up demand indicates a demand to use the generator to start the engine. The device can provide the most suitable starting voltage by intelligently judging the generator start-up demand and accurately acquiring the required voltage, thereby avoiding affecting the starting efficiency and stability of the engine due to excessively high or low voltage.

[0083] Specifically, the system determines whether the generator is needed 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 command issued by the vehicle's self-test 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 required voltage. The required voltage is the voltage level set by the system in order to enable the generator to start the engine smoothly and ensure safety and efficiency during the starting process. This voltage level should take into account the starting characteristics of the engine, the power output capacity of the generator, and the overall power demand of the system.

[0084] The hybrid vehicle starting device includes a processor and a memory, wherein the first control unit, the second control unit, etc. are stored in the memory as program units, and the processor executes the program units stored in the memory to implement corresponding functions. The modules are all located in the same processor; or, the modules are located in different processors in any combination.

[0085] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the problem of excessive shaft voltage causing engine damage during engine startup in the prior art can be solved by adjusting kernel parameters.

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

[0087] An embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, wherein when the program is executed, a device where the computer-readable storage medium is located is controlled to execute the method for starting the hybrid vehicle.

[0088] Specifically, the method for starting a hybrid vehicle includes:

[0089] 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 a voltage for the generator to start the engine;

[0090] 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 working status, and the characteristics of the generator controller. Based on the acquired 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 adjusts 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 to avoid electrical corrosion of the bearing 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.

[0091] 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.

[0092] 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, which is directly related to the stability and efficiency of the system. According to the starting characteristics of the engine, the generator capacity and the system safety requirements, a required voltage is preset or dynamically calculated, that is, the stable voltage value that is expected to be maintained during the engine starting process. This value is set to reduce the shaft voltage during the starting process to prevent electrical corrosion of the bearings and cracking of the lubricating oil. When the detected bus voltage is consistent with the preset required voltage, the system triggers the generator to start the engine through the control circuit or software instructions. This process ensures that the engine is started under the optimal voltage conditions, thereby improving the starting 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, wherein when the processor executes the program, at least the following steps are implemented:

[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 resistance 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 working status, and the characteristics of the generator controller. Based on the acquired 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 adjusts 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 to avoid electrical corrosion of the bearing 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, which is directly related to the stability and efficiency of the system. According to the starting characteristics of the engine, the generator capacity and the system safety requirements, a required voltage is preset or dynamically calculated, that is, the stable voltage value that is expected to be maintained during the engine starting process. This value is set to reduce the shaft voltage during the starting process to prevent electrical corrosion of the bearings and cracking of the lubricating oil. When the detected bus voltage is consistent with the preset required voltage, the system triggers the generator to start the engine through the control circuit or software instructions. This process ensures that the engine is started under the optimal voltage conditions, thereby improving the starting efficiency and safety.

[0098] The devices in this article can be servers, PCs, PADs, mobile phones, etc.

[0099] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the method described in each embodiment of the present 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 a 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 engine starting, that is, the required voltage. This voltage level can be determined by the engine specifications, the current working status, and the characteristics of the generator controller. Based on the acquired 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 adjusts 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 to avoid electrical corrosion of the bearing 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.

[0102] 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.

[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, which is directly related to the stability and efficiency of the system. According to the starting characteristics of the engine, the generator capacity and the system safety requirements, a required voltage is preset or dynamically calculated, that is, the stable voltage value that is expected to be maintained during the engine starting process. This value is set to reduce the shaft voltage during the starting process to prevent electrical corrosion of the bearings and cracking of the lubricating oil. When the detected bus voltage is consistent with the preset required voltage, the system triggers the generator to start the engine through the control circuit or software instructions. This process ensures that the engine is started under the optimal voltage conditions, thereby improving the starting efficiency and safety.

[0104] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0105] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0106] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, 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 device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0107] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0108] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

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

[0110] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0111] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. 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 disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0112] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0113] From the above description, it can be seen that the above 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 resistor element is set in the circuit of the power battery and the positive switch element of the generator controller, and the resistance value of the variable resistor 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. Compared with the prior art, when the engine of the hybrid vehicle is started, the shaft voltage is too high, causing damage to the bearings or even the engine. The present application sets a series connection circuit of the variable resistor element and the positive switch element, and uses the variable resistor element to adjust the voltage between the power battery and the generator controller in real time to avoid the problem of excessive shaft voltage when the engine is started. Therefore, it can solve the problem of engine damage caused by excessive shaft voltage when the engine is started in the prior art, and achieve the effect of reducing the shaft voltage when the engine is started and protecting the engine.

[0115] 2) In the starting device of the hybrid vehicle of the present application, a variable resistor element is set in the circuit of the power battery and the positive switch element of the generator controller, and the resistance value of the variable resistor 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. Compared with the prior art, when the engine of the hybrid vehicle is started, the shaft voltage is too high, causing damage to the bearings or even the engine. The present application sets a series connection circuit of the variable resistor element and the positive switch element, and adjusts the voltage between the power battery and the generator controller in real time through the variable resistor element to avoid the problem of excessive shaft voltage when the engine is started. Therefore, it can solve the problem of engine damage caused by excessive shaft voltage when the engine is started in the prior art, and achieve the effect of reducing the shaft voltage when the engine is started and protecting the engine.

[0116] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for starting a hybrid vehicle, characterized in that: The hybrid vehicle comprises at least a power battery, a generator controller, a generator and an engine, wherein the power battery is electrically connected to the generator controller via at least a first circuit, wherein the first circuit is composed of a variable resistance element and a positive switch element connected in series, wherein the positive switch element is used to control the positive output current of the power battery, and the starting method of the hybrid vehicle comprises: 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 a voltage for the generator to start the engine; The bus voltage of the generator controller is detected, and when the bus voltage is equal to the required voltage, the generator is controlled to start the engine.

2. The method for starting a hybrid vehicle according to claim 1, characterized in that: The power battery is also electrically connected to the generator controller via 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 electrode output current of the power battery. Before obtaining the required voltage, the method further includes: In the case of receiving a high-voltage power-on signal, controlling the negative switch element to close, wherein the high-voltage power-on signal indicates that the hybrid vehicle is powered on and started; Controlling 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 high-voltage power-on start of the hybrid vehicle; The positive switching element is controlled to be closed.

3. The method for starting a hybrid vehicle according to claim 2, characterized in that: After controlling the positive switch element to close, the method further includes: The bus voltage of the generator controller is detected, and when the bus voltage is greater than or equal to a preset voltage, the resistance value of the variable resistance element is controlled to be 0.

4. The method for starting a hybrid vehicle according to claim 1, characterized in that: After controlling the generator to start the engine, the method further includes: After the engine is started successfully, the resistance value of the variable resistance element is controlled to be 0.

5. The method for starting a hybrid vehicle according to claim 1, characterized in that: Calculating the starting resistance value according to the required voltage includes: Get the starting current; The ratio of the required voltage to the starting current is calculated to obtain the starting resistance value.

6. The method for starting a hybrid vehicle according to claim 1, characterized in that: The engine includes a starter, and the method further includes: When the bus voltage is not equal to the required voltage, the starter is controlled to start the engine.

7. The method for starting a hybrid vehicle according to claim 1, characterized in that: Get the required voltage, including: The demand voltage is acquired in case a generator start request is received, wherein the generator start request indicates a request to start the engine using the generator.

8. A starting device for a hybrid vehicle, characterized in that: The hybrid vehicle comprises at least a power battery, a generator controller, a generator and an engine, wherein the power battery is electrically connected to the generator controller via at least a first circuit, wherein the first circuit is composed of a variable resistance element and a positive switch element connected in series, wherein the positive switch element is used to control the positive output current of the power battery, and the starting device of the hybrid vehicle comprises: a first control unit, 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 causing the generator to start the engine; The second control unit is used 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.

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

10. A hybrid vehicle, characterized in that: include: A power battery, a generator controller, a generator and an engine, wherein the power battery is electrically connected to the generator controller through at least a first circuit, wherein the first circuit is composed of a variable resistance element and a positive switch element connected in series, wherein the positive switch element is used to control the positive output current of the power battery, wherein the engine includes a starter, wherein the starter and the generator are used to control the starting of the engine, wherein the power battery is also electrically connected to the generator controller through a second circuit, wherein the second circuit is connected in parallel with the first circuit, wherein the second circuit includes a negative switch element, wherein the negative switch element is used to control 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 are configured to be executed by the one or more processors, and the one or more programs include a method for executing a starting method of a hybrid vehicle as described in any one of claims 1 to 7.

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