Capacitor voltage management method, device, electronic device and readable medium

Abstract

The embodiments of the present application disclose a capacitor voltage management method, device, electronic device and readable medium, the method comprising: if it is detected that the voltage of the support capacitor in the vehicle range extender continuously reaches a preset voltage within a preset time period, a zero torque command is sent to the engine controller and the generator controller in the vehicle range extender respectively to reduce the speed of the engine in the vehicle range extender and the speed of the generator in the vehicle range extender; the speed of the generator in response to the zero torque command is obtained; the speed obtained is compared with the preset speed threshold to obtain a comparison result; the support capacitor is subjected to voltage reduction processing based on the voltage control strategy corresponding to the comparison result. The technical solution of the embodiment of the present application can avoid overvoltage of the support capacitor in the generator controller to ensure the normal operation of the vehicle.

Description

Technical Field

[0001] The present application relates to the field of electrical control and computer technology, and more specifically, to a capacitor voltage management method, device, electronic device, and computer-readable medium. Background Art

[0002] Range extenders are vehicle components that can provide additional electrical energy, thereby increasing the mileage of electric vehicles. Range extenders include engines, engine management systems (EMS), generators, and generator control units (GCU). At the same time, range extenders mainly provide electrical energy to the entire vehicle by connecting to nodes such as the vehicle battery pack and drive motor.

[0003] When the range extender is working, the engine will drive the generator to generate electricity; if the DC bus output terminal is disconnected at this time, a large amount of electricity will flow into the support capacitor in the generator controller, causing the support capacitor voltage to rise rapidly, thereby damaging the support capacitor and affecting the normal operation of the vehicle. Therefore, how to avoid overvoltage of the support capacitor in the generator controller to ensure the normal operation of the vehicle is an urgent problem to be solved. Summary of the invention

[0004] The embodiments of the present application provide a capacitor voltage management method, a capacitor voltage management device, an electronic device, a computer-readable storage medium, and a computer program product, which can prevent overvoltage of the support capacitor in the generator controller to ensure the normal operation of the vehicle.

[0005] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0006] According to one aspect of an embodiment of the present application, a capacitor voltage management method is provided, the method comprising:

[0007] If it is detected that the voltage of the support capacitor in the vehicle range extender continuously reaches a preset voltage within a preset time period, a zero torque command is sent to an engine controller and a generator controller in the vehicle range extender respectively to reduce the speed of the engine in the vehicle range extender and the speed of the generator in the vehicle range extender;

[0008] Acquiring the rotation speed of the generator in a process of responding to a zero torque command;

[0009] Compare the acquired rotation speed with a preset rotation speed threshold to obtain a comparison result;

[0010] The support capacitor is subjected to voltage reduction processing based on a voltage control strategy corresponding to the comparison result.

[0011] According to one aspect of an embodiment of the present application, a capacitor voltage management device is provided, the device comprising a voltage detection unit and a voltage management unit, wherein:

[0012] The voltage detection unit is used to send a zero torque command to the engine controller and the generator controller in the vehicle range extender respectively to reduce the speed of the engine in the vehicle range extender and the speed of the generator in the vehicle range extender if it is detected that the voltage of the support capacitor in the vehicle range extender continuously reaches a preset voltage within a preset time period;

[0013] The voltage management unit is used to obtain the rotation speed of the generator in the process of responding to the zero torque command;

[0014] The voltage management unit is further used to compare the acquired rotation speed with a preset rotation speed threshold to obtain a comparison result;

[0015] The voltage management unit is further used to reduce the voltage of the support capacitor based on a voltage control strategy corresponding to the comparison result.

[0016] According to one aspect of an embodiment of the present application, an embodiment of the present application provides an electronic device, which includes one or more processors; a storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors implement the capacitor voltage management method as described above.

[0017] According to one aspect of an embodiment of the present application, the embodiment of the present application provides a computer storage medium on which one or more computer programs are stored, and the one or more computer programs are suitable for being loaded by a processor and executing the capacitor voltage management method as described above.

[0018] According to one aspect of an embodiment of the present application, an embodiment of the present application provides a computer program product, including a computer program, wherein the computer program is stored in a computer-readable storage medium, and a processor of an electronic device reads and executes the computer program from the computer-readable storage medium, so that the electronic device performs the capacitor voltage management method as described above.

[0019] In the technical solution provided in the embodiment of the present application, by detecting whether the voltage of the support capacitor continues to reach the preset voltage within a preset time period, it is possible to accurately detect whether the DC bus is broken; at the same time, by immediately sending a zero torque command to the engine controller and the generator controller respectively after detecting the DC bus break, the generator can reduce power generation and reduce the power generation voltage, thereby avoiding the support capacitor from being damaged in a short time. In addition, in the embodiment of the present application, different voltage control strategies are set for different comparison results between the generator speed and the preset speed threshold, so that the voltage of the support capacitor is steadily reduced while ensuring that the support capacitor and other components in the vehicle will not be damaged, thereby avoiding overvoltage of the support capacitor to ensure the normal operation of the vehicle.

[0020] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 is a schematic diagram of a circuit structure of a range extender provided in an embodiment of the present application;

[0023] Figure 2 It is a structural schematic diagram of a vehicle control system provided by an embodiment of the present application;

[0024] Figure 3 It is a flow chart of a capacitor voltage management method provided in an embodiment of the present application;

[0025] Figure 4 This is a schematic diagram of a voltage control process of a support capacitor provided in an embodiment of the present application;

[0026] Figure 5 is a structural block diagram of a capacitor voltage management device shown in an exemplary embodiment of the present application;

[0027] Figure 6 It is a schematic structural diagram of a hybrid vehicle shown in an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0028] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0029] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0030] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all contents and operations, nor must they be executed in the order described. For example, some operations may be decomposed, while some operations may be combined or partially combined, so the actual execution order may change according to actual conditions.

[0031] It should also be noted that the "multiple" mentioned in this application refers to two or more than two. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship.

[0032] With the development of road traffic, electric vehicles account for an increasing share of the automobile market. Electric vehicles refer to vehicles that use onboard power as a power source, use motors to drive wheels, and comply with various requirements of road traffic and safety regulations. As the impact on the environment is relatively small compared to traditional fuel vehicles, the prospects of electric vehicles are widely optimistic. Electric vehicles include pure electric vehicles, hybrid vehicles, fuel cell vehicles, etc.

[0033] Among them, hybrid vehicles mainly include extended-range electric vehicles. The range extender inside the extended-range electric vehicle can charge the power battery or directly drive the motor to increase the cruising range, thereby overcoming the problem of short mileage of pure electric vehicles.

[0034] The range extender is a vehicle component that can provide additional electrical energy, thereby increasing the mileage of electric vehicles. The range extender includes the engine, engine management system (EMS), generator, and generator control unit (GCU). At the same time, the range extender is mainly connected to the vehicle battery pack, drive motor and other nodes through the DC output bus to provide electrical energy for the vehicle.

[0035] Please see attached Figure 1 , shows a schematic diagram of the circuit structure of a range extender. Figure 1 As shown, the range extender includes a generator 101, a GCU equivalent circuit 102, an electric drive controller 103 and an engine 104. The range extender is connected to a battery pack 105. Figure 1 The AB terminal is the DC bus output terminal.

[0036] like Figure 1 As shown, when the range extender is working, the engine 104 will drive the generator 101 to generate electricity; at this time, if the DC bus output terminal AB of the range extender is disconnected, a large amount of electric energy will flow into the support capacitor 106 in the GCU equivalent circuit 102, causing the voltage of the support capacitor 106 to rise rapidly, thereby damaging the support capacitor 106. It should be noted that Figure 1 This is only an example of the circuit structure of a range extender, and the circuit structures of different range extenders may be different.

[0037] In the related art, special detection circuits and protection circuits are generally installed for overvoltage protection of supporting capacitors; however, this not only increases costs, but also requires more space to arrange the circuits, posing a challenge to the layout space in the vehicle.

[0038] For specific implementation, please refer to the attached Figure 2 , shows a schematic diagram of the structure of a vehicle control system, wherein VCU (Vehicle Control Unit) refers to the vehicle controller of the vehicle. Figure 1 The dotted line in the figure indicates that the two are connected via a control signal, and the solid line indicates that the two are connected electrically. Figure 2 As shown, the VCU can control the generator and the engine by sending control signals or instructions to the GCU and EMS.

[0039] The following is a detailed description of various implementation details of the technical solution of the embodiment of the present application:

[0040] like Figure 3 As shown, Figure 3 is a flow chart of a capacitor voltage management method shown in an embodiment of the present application, which can be applied to Figure 1 The vehicle control system shown can also be applied to any unit or system that can control the range extender, such as the vehicle terminal, vehicle controller (VCU) in the vehicle. In the embodiment of the present application, the method is executed by the vehicle controller as an example. Among them, the capacitor voltage management method can include S301 to S304, which are described in detail as follows:

[0041] S301: If it is detected that the voltage of the support capacitor in the vehicle range extender continues to reach a preset voltage within a preset time period, a zero torque command is sent to the engine controller and the generator controller in the vehicle range extender respectively to reduce the speed of the engine in the vehicle range extender and the speed of the generator in the vehicle range extender.

[0042] In the embodiment of the present application, the voltage of the support capacitor can be detected in real time by the generator controller. The voltage of the support capacitor reaches the preset voltage means that the voltage of the support capacitor is greater than or equal to the preset voltage. The preset voltage and the preset time period can be set manually or by the vehicle terminal or the vehicle controller, which is not limited here.

[0043] Specifically, the preset voltage is set based on the maximum voltage of the vehicle battery. In order to avoid the impact of transient voltage, it is necessary to determine whether the voltage of the support capacitor has continuously reached the preset voltage for a period of time to perform transient voltage filtering. Considering that if the voltage of the support capacitor continues to reach the preset voltage for too long, it will cause damage to the support capacitor; therefore, the preset time period can be set based on the time required from the start time when the voltage of the support capacitor continuously reaches the preset voltage to the time when the support capacitor is damaged; at the same time, the preset time period cannot be too short.

[0044] At the same time, since the voltage of the supporting capacitor increases due to the short circuit at the DC bus output end, if the voltage of the supporting capacitor continues to reach the preset voltage within the preset time period, it can be determined that the DC bus output end has a short circuit.

[0045] In one embodiment, the zero torque instruction is used to instruct the generator or engine to control the torque to be zero. After receiving the zero torque instruction, the engine controller can respond to the zero torque instruction to control the engine torque to be zero. The generator controller is similar and will not be described in detail here.

[0046] When the torque of the generator or the engine is zero, the speed of the generator or the engine will decrease until it stops. Therefore, the speed of the engine can be reduced until the engine stops by a zero torque command for the engine; the speed of the generator can be reduced until the generator stops by a zero torque command for the generator.

[0047] Specifically, when it is detected that the voltage of the support capacitor continues to reach the preset voltage within a preset time period, it indicates that a circuit is broken at the output end of the DC bus; if the engine and generator continue to rotate to generate electricity at this time, the electric energy will flow into the support capacitor faster, thereby accelerating the damage to the support capacitor. Therefore, if it is detected that the voltage of the support capacitor continues to reach the preset voltage within a preset time period, in order to avoid overvoltage damage to the support capacitor in a short period of time, it is necessary to control the engine and generator to stop rotating as soon as possible, thereby stopping power generation.

[0048] In a specific implementation, if the generator controller detects that the voltage of the supporting capacitor in the vehicle range extender continues to reach a preset voltage within a preset time period, it can send overvoltage fault information about the supporting capacitor to the vehicle controller. At this time, it is equivalent to the vehicle controller detecting that the voltage of the supporting capacitor in the vehicle range extender continues to reach a preset voltage within a preset time period, that is, a short circuit occurs at the DC bus output end.

[0049] After receiving the overvoltage fault information, the vehicle controller can enter the circuit breaker protection mode. In the circuit breaker protection mode, the vehicle controller will send zero torque commands to the engine controller and the generator controller respectively to reduce the torque and speed of the engine and generator in the vehicle range extender.

[0050] S302: Obtain the rotation speed of the generator in a process of responding to a zero torque command.

[0051] In the embodiment of the present application, the process of the generator responding to the zero torque command may include: the moment when the torque of the generator is zero to the moment when the generator stops rotating. Optionally, the process of the generator responding to the zero torque command may also include: a period of time after the torque of the generator is zero to the moment when the generator stops rotating.

[0052] Optionally, starting from the moment when the torque of the generator is detected to be zero, the rotational speed of the generator in the process of responding to the zero torque instruction can be obtained in real time, irregularly or periodically.

[0053] S303: Compare the acquired rotation speed with a preset rotation speed threshold to obtain a comparison result.

[0054] In an embodiment of the present application, the preset speed threshold may include a first speed. Optionally, the preset speed threshold may also include a second speed. The second speed is less than the first speed, and the second speed may be a value close to zero or zero. The first speed and the second speed may be manually set or may be set by a vehicle terminal or a vehicle controller, which is not limited here.

[0055] Therefore, the comparison result can be used to indicate that the acquired rotational speed is greater than the first rotational speed, or the acquired rotational speed is less than or equal to the first rotational speed. Further, the comparison result can also be used to indicate that the acquired rotational speed is less than or equal to the second rotational speed.

[0056] Optionally, different voltage control strategies can be set in advance for different comparison results. Specifically, when the speed of the generator has not dropped sufficiently low, in order to prevent the electric energy from continuously flowing to the support capacitor, causing the voltage of the support capacitor to continue to increase, the electric energy can be prevented from flowing to the support capacitor at the first time. Therefore, when the comparison result is used to characterize that the acquired speed is greater than the first speed, a voltage control strategy for preventing the electric energy from flowing to the support capacitor can be set.

[0057] At the same time, when the speed of the generator has dropped to a sufficiently low level or even zero, the generator will no longer generate electrical energy, and active discharge will be beneficial to discharge the energy of the support capacitor and reduce the voltage of the support capacitor; therefore, when the speed obtained by the characterization is less than or equal to the second speed, a voltage control strategy for active discharge to reduce the voltage of the support capacitor can be set.

[0058] S304 , performing voltage reduction processing on the support capacitor based on a voltage control strategy corresponding to the comparison result.

[0059] In the embodiment of the present application, since step S302 mentions that the speed of the generator in response to the zero torque command will be continuously obtained, there will be different comparison results at different times; therefore, the support capacitor can be reduced in voltage at different times according to the voltage control strategy corresponding to the different comparison results.

[0060] In one embodiment, if the comparison result is used to indicate that the acquired rotation speed is greater than the first rotation speed, an internal circuit of the generator controller is actively short-circuited to prevent the current in the generator controller from flowing to the support capacitor.

[0061] Specifically, the specific method of active short circuit processing can be to control the GCU to enter the active short circuit protection mode (Active Short Circuit, ASC). ASC is to turn on the upper arm (i.e. Figure 1 Medium V a 、V b 、V c part) or the lower bridge arm (i.e. Figure 1 Middle V' a , V′ b , V′ c The three-phase windings are actively short-circuited, thus preventing the current from flowing to the DC bus side and thus preventing the voltage of the supporting capacitor from pumping up. At the same time, a braking torque will be generated to accelerate the engine crankshaft to stop rotating and shorten the action time of the generator back electromotive force.

[0062] Optionally, in the active short circuit protection mode, if the generator speed is low, a large braking torque will be generated, which will have an adverse effect on stopping the engine crankshaft. Therefore, when the generator speed drops to a certain extent, in order to ensure the safe operation of the engine, a voltage control strategy can be set to reduce the braking torque caused by the active short circuit.

[0063] Therefore, if the comparison result is used to indicate that the acquired speed is less than or equal to the first speed, the power device included in the internal circuit of the generator controller is turned off. The power device may specifically include a metal-oxide-semiconductor field-effect transistor (MOSFET), an IGBT, and a SIC MOSFET (i.e., silicon carbide MOSFET).

[0064] In practical applications, the specific process of the shutdown process may include: controlling the GCU to enter a switching pulse off mode (SPO), which is to turn off all IGBTs of the GCU to reduce the impact of the braking torque on the engine crankshaft.

[0065] In one embodiment, referring to the detailed description of the voltage control strategy in step S303, if the comparison result is used to indicate that the acquired rotation speed is less than or equal to the second rotation speed, the generator controller may be controlled to actively discharge the support capacitor.

[0066] Among them, the active discharge scheme may include one or more schemes for capacitor discharge, such as discharge using motor windings, direct discharge using bridge arms, and discharge using discharge resistors. The method of active discharge is not limited here.

[0067] Optionally, since the discharge method of active short circuit will cause the circuit temperature of the internal circuit of the generator to rise, thereby damaging the motor. Therefore, in order to further protect the safety of the motor and ensure the normal operation of the vehicle, the specific process of controlling the generator controller to actively discharge the support capacitor may include: obtaining the circuit temperature of the generator; if the circuit temperature is less than the preset temperature, and the difference between the circuit temperature and the preset temperature is greater than or equal to the preset difference, then controlling the generator controller to actively discharge the support capacitor. Among them, the circuit temperature of the generator can specifically be the generator winding temperature.

[0068] In one possible implementation, if it is detected that the voltage of the support capacitor is less than or equal to the safety voltage, a shutdown command is sent to the engine and the generator respectively; and fault control is performed on the vehicle range extender.

[0069] The safety voltage can be set manually or by the vehicle terminal or vehicle controller, which is not limited here. Specifically, the safety voltage can be a voltage that does not cause damage to the human body and the vehicle, which is conducive to ensuring the safety of the subsequent inspection personnel for the circuit breaker fault. For example, when the DC voltage is higher than 60V, it will be harmful to the human body, so the safety voltage can be set to 60V.

[0070] Optionally, fault management and control may include outputting fault prompt information for the vehicle range extender, outputting fault prompt information for a DC bus circuit breaker in the vehicle range extender, and prohibiting the operation of the vehicle range extender.

[0071] Optionally, the specific process of fault control may include: updating the operating state of the vehicle range extender to prohibit operation; if a circuit breaker recovery operation for the DC output bus in the vehicle range extender is detected, updating the operating state of the range extender to allow operation. The circuit breaker recovery operation may be initiated manually or by the vehicle terminal or vehicle controller, which is not limited here.

[0072] For specific implementation, please refer to the attached Figure 4 , showing a schematic diagram of the voltage control process of a supporting capacitor. When the vehicle range extender is in operation, such as Figure 4 As shown, the VCU can control the GCU to detect the voltage U of the supporting capacitor in real time, and compare the detected voltage U with the preset voltage; if the voltage U detected within time t (i.e., the preset time period, t is a positive number) is greater than or equal to the preset voltage, the GCU can update the fault state GY used to characterize the DC bus circuit breaker to TRUE, that is, the DC bus circuit breaker is true.

[0073] Then, if Figure 4 As shown in the figure, when GY is not equal to TRUE (i.e., the DC bus is not broken), the VCU is in normal power generation mode, i.e., the generator speed is controlled by the GCU and the engine torque is controlled by the EMS. At the same time, the VCU can also collect the voltage U of the supporting capacitor in real time through the GCU, so as to exit the power generation mode and enter the circuit breaker protection mode after the GCU updates GY to TRUE.

[0074] like Figure 4 As shown in the figure, after the VCU enters the circuit breaker protection mode, it will send a zero torque command to the GCU and EMS respectively to slow down the generator and engine; and the generator speed W will be obtained in real time through the GCU. When W>W1, the VCU enters the ASC mode, and when W2≤W≤W1, the VCU enters the SPO mode.

[0075] When GCU detects W≤W2, GCU will further detect the generator winding temperature T. If T≤T1 (i.e., the preset temperature), VCU will control GCU to perform active discharge and discharge the electric energy of the support capacitor through the motor winding; if T≥T1, VCU will enter the standby state (i.e., not control GCU to perform active discharge); however, if it detects T≤T1-ΔT, VCU will control GCU to perform active discharge again. Among them, ΔT is the preset difference.

[0076] Afterwards, if Figure 4 As shown, when the voltage U≤60V (i.e., the safety voltage) of the supporting capacitor is detected by the GCU, the GCU can send a signal about exiting the circuit breaker protection state to the VCU, so that the VCU exits the circuit breaker protection mode, and sends a shutdown instruction to the EMS and GCU to control the EMS and GCU to stop running; at the same time, the VCU itself also enters the shutdown mode, and saves the fault state GY=TRUE.

[0077] After the staff manually clears the circuit breaker fault, the fault state GY can be updated to other states (non-TRUE), which is equivalent to the circuit breaker recovery operation for the DC output bus in the vehicle range extender. Then, the operation state of the vehicle range extender can be updated to allow operation. Only when the fault state GY is in other states, the vehicle range extender, VCU and even the entire vehicle can operate normally; otherwise, operation is prohibited.

[0078] In the embodiment of the present application, by detecting whether the voltage of the supporting capacitor continues to reach a preset voltage within a preset time period, it is possible to accurately detect whether the DC bus is open-circuited; at the same time, by immediately sending a zero torque command to the engine controller and the generator controller respectively after detecting the DC bus open-circuit, the generator can reduce power generation and lower the power generation voltage, thereby avoiding damage to the supporting capacitor in a short time.

[0079] In addition, in the embodiment of the present application, different voltage control strategies are set for different comparison results between the generator speed and the preset speed threshold. In this way, the voltage of the support capacitor is steadily reduced while ensuring that the support capacitor and other components in the vehicle will not be damaged, thereby avoiding overvoltage of the support capacitor and ensuring the normal operation of the vehicle.

[0080] It can be seen that the embodiments of the present application utilize the existing circuits and short-circuit current characteristics of the motor in the vehicle range extender, and design corresponding voltage detection and voltage control strategies. Without increasing the circuit cost, it is possible to achieve circuit break fault detection for the DC bus and overvoltage protection for the supporting capacitor, thereby effectively protecting the supporting capacitor from damage and ensuring the normal operation of the vehicle.

[0081] Here, the device embodiment of the present application is introduced, which can be used to execute the capacitor voltage management method in the above embodiment of the present application. For details not disclosed in the device embodiment of the present application, please refer to the above embodiment of the capacitor voltage management method of the present application.

[0082] The present application embodiment provides a capacitor voltage management device, such as Figure 5 As shown, the device includes a voltage detection unit 501 and a voltage management unit 502, wherein:

[0083] The voltage detection unit 501 is used to send a zero torque command to the engine controller and the generator controller in the vehicle range extender respectively to reduce the speed of the engine in the vehicle range extender and the speed of the generator in the vehicle range extender if it is detected that the voltage of the support capacitor in the vehicle range extender continuously reaches a preset voltage within a preset time period;

[0084] The voltage management unit 502 is used to obtain the rotation speed of the generator in the process of responding to the zero torque command;

[0085] The voltage management unit 502 is further used to compare the acquired rotation speed with a preset rotation speed threshold to obtain a comparison result;

[0086] The voltage management unit 502 is further configured to reduce the voltage of the support capacitor based on a voltage control strategy corresponding to the comparison result.

[0087] In one embodiment of the present application, the preset speed threshold includes a first speed; based on the aforementioned scheme, when the voltage management unit 502 reduces the voltage of the support capacitor based on the voltage control strategy corresponding to the comparison result, it can be specifically used for: if the comparison result is used to characterize that the acquired speed is greater than the first speed, then the internal circuit of the generator controller is actively short-circuited.

[0088] In one embodiment of the present application, based on the above solution, the voltage management unit 502 can be used to: if the comparison result is used to indicate that the acquired speed is less than or equal to the first speed, then shut down the power device included in the internal circuit of the generator controller.

[0089] In one embodiment of the present application, the preset speed threshold also includes a second speed, which is less than the first speed; based on the above scheme, the voltage management unit 502 can also be used for: if the comparison result is used to characterize that the acquired speed is less than or equal to the second speed, then the generator controller is controlled to actively discharge the support capacitor.

[0090] In one embodiment of the present application, based on the aforementioned scheme, when the voltage management unit 502 controls the generator controller to actively discharge the support capacitor, it can be specifically used to: obtain the circuit temperature of the generator; if the circuit temperature is lower than the preset temperature, and the difference between the circuit temperature and the preset temperature is greater than or equal to the preset difference, then control the generator controller to actively discharge the support capacitor.

[0091] In one embodiment of the present application, based on the above-mentioned scheme, the voltage management unit 502 can also be used to: if it is detected that the voltage of the support capacitor is less than or equal to the safety voltage, send a shutdown command to the engine and the generator respectively; and perform fault control on the vehicle range extender.

[0092] In one embodiment of the present application, based on the aforementioned scheme, when the voltage management unit 502 performs fault control on the vehicle range extender, it can be specifically used to: update the operating state of the vehicle range extender to prohibit operation; if a circuit breaker recovery operation for the DC output bus in the vehicle range extender is detected, the operating state of the vehicle range extender is updated to allow operation.

[0093] It should be noted that the device provided in the above embodiment and the method provided in the above embodiment belong to the same concept, wherein the specific manner in which each module and unit performs the operation has been described in detail in the method embodiment and will not be repeated here.

[0094] The device provided in the above embodiment can be arranged in a terminal device or in a server. The device provided in the embodiment of the present application can accurately detect whether the DC bus is broken by detecting whether the voltage of the support capacitor continues to reach the preset voltage within a preset time period; at the same time, by immediately sending a zero torque command to the engine controller and the generator controller respectively after detecting the DC bus is broken, the generator can reduce power generation, thereby avoiding damage to the support capacitor in a short time. In addition, in the embodiment of the present application, different voltage control strategies are set for different comparison results between the speed of the generator and the preset speed threshold, so that the voltage of the support capacitor is steadily reduced while ensuring that the support capacitor and other components in the vehicle will not be damaged, thereby avoiding overvoltage of the support capacitor to ensure the normal operation of the vehicle.

[0095] An embodiment of the present application also provides an electronic device, comprising one or more processors and a storage device, wherein the storage device is used to store one or more computer programs, and when the one or more computer programs are executed by one or more processors, the electronic device implements the above capacitor voltage management method.

[0096] Figure 6 FIG. 1 shows a schematic diagram of the structure of a hybrid vehicle in one embodiment of the present application. Figure 6As shown, the hybrid vehicle in the embodiment of the present application includes a vehicle controller 600, which may include one or more of the following components: a processor 601, a memory 602, and one or more applications. Among them, the one or more applications may be stored in the memory 602 and configured to be executed by the one or more processors 601, and the one or more applications are configured to execute the driving method of the hybrid vehicle as described in the above method embodiment.

[0097] The processor 601 may include one or more processing cores. The processor 601 uses various interfaces and lines to connect various parts of the entire hybrid vehicle, and executes various functions of the hybrid vehicle and processes data by running or executing instructions, programs, code sets or instruction sets stored in the memory 602, and calling data stored in the memory 602. Optionally, the processor 601 can be implemented in at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), and programmable logic array (PLA). The processor 601 can integrate one or a combination of a central processing unit (CPU), a graphics processing unit (GPU), and a modem. Among them, the CPU mainly processes the operating system, user interface, and application programs; the GPU is responsible for rendering and drawing display content; and the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 601, but may be implemented separately through a communication chip.

[0098] The memory 602 may include a random access memory (RAM) or a read-only memory (ROM). The memory 602 may be used to store instructions, programs, codes, code sets or instruction sets. The memory 602 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for implementing at least one function, instructions for implementing the above-mentioned various method embodiments, etc. The data storage area may also store data created by the hybrid vehicle during use.

[0099] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the devices, methods and computer program products according to various embodiments of the present application. Among them, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and a computer program.

[0100] The units or modules involved in the embodiments described in this application may be implemented by software or hardware, and the units or modules described may also be set in a processor. The names of these units or modules do not, in some cases, constitute limitations on the units or modules themselves.

[0101] Another aspect of the present application further provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the capacitor voltage management method as described above is implemented. The computer-readable storage medium may be included in the electronic device described in the above embodiment, or may exist independently without being assembled into the electronic device.

[0102] Another aspect of the present application also provides a computer program product, which includes a computer program stored in a computer-readable storage medium. A processor of an electronic device reads the computer program from the computer-readable storage medium, and the processor executes the computer program, so that the electronic device executes the capacitor voltage management method as described above in the above embodiments.

[0103] It should be noted that, although several modules or units of the equipment for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into being embodied by multiple modules or units.

[0104] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art that are not disclosed in the present application.

[0105] The above content is only a preferred exemplary embodiment of the present application and is not intended to limit the implementation scheme of the present application. A person of ordinary skill in the art can easily make corresponding changes or modifications based on the main concept and spirit of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection required by the claims.

Claims

1. A capacitor voltage management method, characterized in that: include: If it is detected that the voltage of the support capacitor in the vehicle range extender continuously reaches a preset voltage within a preset time period, a zero torque command is sent to an engine controller and a generator controller in the vehicle range extender respectively to reduce the speed of the engine in the vehicle range extender and the speed of the generator in the vehicle range extender; Acquiring the rotation speed of the generator in a process of responding to a zero torque command; Compare the acquired rotation speed with a preset rotation speed threshold to obtain a comparison result; Performing voltage reduction processing on the support capacitor based on a voltage control strategy corresponding to the comparison result; The preset speed threshold includes a first speed and a second speed, and the second speed is less than the first speed; The step of reducing the voltage of the support capacitor based on the voltage control strategy corresponding to the comparison result includes: If the comparison result is used to indicate that the acquired rotational speed is greater than the first rotational speed, actively short-circuiting the internal circuit of the generator controller; If the comparison result is used to indicate that the acquired rotational speed is less than or equal to the second rotational speed, the generator controller is controlled to actively discharge the support capacitor.

2. The method according to claim 1, characterized in that The method further comprises: If the comparison result is used to indicate that the acquired rotation speed is less than or equal to the first rotation speed, a power device included in an internal circuit of the generator controller is shut down.

3. The method according to claim 1, characterized in that The controlling the generator controller to actively discharge the support capacitor includes: obtaining a circuit temperature of the generator; If the circuit temperature is lower than a preset temperature, and the difference between the circuit temperature and the preset temperature is greater than or equal to a preset difference, the generator controller is controlled to actively discharge the support capacitor.

4. The method according to any one of claims 1 to 3, characterized in that The method further comprises: If it is detected that the voltage of the support capacitor is less than or equal to the safety voltage, a shutdown command is sent to the engine and the generator respectively; Performing fault management and control on the vehicle range extender.

5. The method according to claim 4, characterized in that The fault control of the vehicle range extender includes: Updating the operating state of the vehicle range extender to prohibiting operation; If a circuit breaker recovery operation for a DC output bus in the vehicle range extender is detected, the operating state of the vehicle range extender is updated to allow operation.

6. A capacitor voltage management device, characterized in that: It includes a voltage detection unit and a voltage management unit, wherein: The voltage detection unit is used to send a zero torque command to the engine controller and the generator controller in the vehicle range extender respectively to reduce the speed of the engine in the vehicle range extender and the speed of the generator in the vehicle range extender if it is detected that the voltage of the support capacitor in the vehicle range extender continuously reaches a preset voltage within a preset time period; The voltage management unit is used to obtain the rotation speed of the generator in the process of responding to the zero torque command; The voltage management unit is further used to compare the acquired rotation speed with a preset rotation speed threshold to obtain a comparison result; The voltage management unit is further used to perform voltage reduction processing on the support capacitor based on the voltage control strategy corresponding to the comparison result; The preset speed threshold includes a first speed and a second speed, the second speed being less than the first speed; when the voltage management unit performs voltage reduction processing on the support capacitor based on the voltage control strategy corresponding to the comparison result, if the comparison result is used to represent that the acquired speed is greater than the first speed, then the internal circuit of the generator controller is actively short-circuited; if the comparison result is used to represent that the acquired speed is less than or equal to the second speed, then the generator controller is controlled to actively discharge the support capacitor.

7. A computer storage medium, characterized in that: The computer storage medium stores one or more computer programs, and the one or more computer programs are suitable for being loaded by a processor and executing the capacitor voltage management method according to any one of claims 1 to 5.

8. An electronic device, characterized in that: include: one or more processors; A storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, enables the one or more processors to implement the capacitor voltage management method as described in any one of claims 1 to 5.

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