CN117155008A

CN117155008A - Power supply system and power supply method

Info

Publication number: CN117155008A
Application number: CN202211340615.XA
Authority: CN
Inventors: 张海涛; 卜异珍
Original assignee: Zhikong Power Beijing Technology Co ltd
Current assignee: Zhikong Power Beijing Technology Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-12-01

Abstract

The application discloses a power supply system and a power supply method. The power supply system includes: the device comprises a flywheel motor, a power conversion module, a power supply control module, a first power supply interface, a second power supply interface and a communication bus; the flywheel motor module comprises a flywheel motor and a converter circuit; the power supply control module is respectively connected with the control ends of the variable-current circuit and the power change module through the communication bus; the rotor of the flywheel motor is arranged on a crankshaft of an engine of the special vehicle instead of an engine flywheel; the stator of the flywheel motor is arranged on the shell of the engine and is connected with the first end of the converter circuit; the second end of the converter circuit is connected with the first end of the power conversion module and the first power supply interface; the second end of the power conversion module is connected with the second power supply interface. The vehicle-mounted parking power generation device can realize driving power generation and parking power generation, does not need to refit the base of the special vehicle, is compact in structure and is beneficial to type authentication of the special vehicle.

Description

Power supply system and power supply method

Technical Field

The application belongs to the technical field of power supply of special vehicles, and particularly relates to a power supply system and a power supply method.

Background

In the related art, the scheme of power taking and power generation from the transmission shaft is that a set of generator is additionally arranged between an engine flywheel and a clutch, so that driving power generation and parking power generation can be realized, and the power supply has the advantage of high power supply, but the chassis is required to be greatly changed, and meanwhile, a frame cross beam and the like are required to be changed, so that the structure is not compact enough, and the model authentication of a special vehicle is difficult.

Disclosure of Invention

The embodiment of the application aims to provide a power supply system and a power supply method, which can realize driving power generation and parking power generation under the condition that a vehicle chassis is not required to be refitted.

In a first aspect, an embodiment of the present application provides a power supply system applied to a special vehicle; the power supply system includes:

the device comprises a flywheel motor, a power conversion module, a power supply control module, a first power supply interface, a second power supply interface and a communication bus; the flywheel motor comprises a flywheel motor and a variable current circuit; the power supply control module is respectively connected with the control ends of the variable-current circuit and the power change module through the communication bus; the rotor of the flywheel motor is arranged on a crankshaft of an engine of the special vehicle instead of an engine flywheel; the stator of the flywheel motor is arranged on the shell of the engine and is connected with the first end of the variable current circuit; the second end of the converter circuit is connected with the first end of the power conversion module and the first power supply interface; the second end of the power conversion module is connected with the second power supply interface;

The power supply control module is used for acquiring the working mode of the special vehicle, and generating a first control signal and a second control signal under the condition that the working mode of the special vehicle is a first type mode representing power generation;

the flywheel motor is used for generating a three-phase alternating current signal based on the torque output by the crankshaft and outputting the three-phase alternating current signal to the converter circuit;

the converter circuit is used for responding to the first control signal, converting the three-phase alternating current signal into a first target direct current signal and providing the first target direct current signal to the first power supply interface and the power conversion module so as to provide the first target direct current signal to a first load corresponding to the first power supply interface;

the power conversion module is used for responding to the second control signal to perform first signal conversion on the first target direct current signal to obtain a target alternating current signal; and carrying out second signal transformation on the first target signal to obtain a second target direct current signal, and providing the target alternating current signal and the second target direct current signal to the second power supply interface so as to provide the target alternating current signal and the second target direct current signal to a second load corresponding to the second power supply interface.

In some embodiments, the power supply system further comprises a battery module comprising a battery control circuit and a storage battery; the battery control circuit is connected between the second end of the converter circuit and the storage battery; the power supply control module is connected with the control end of the battery control circuit through the communication bus; the power supply control module is used for acquiring the working mode of the special vehicle and the electric quantity of the storage battery, and generating a third control signal when the working mode of the special vehicle is the first type mode and the electric quantity of the storage battery is smaller than or equal to a first threshold value;

the current transformation circuit is also used for providing the first target direct current signal to the battery control circuit;

and the battery control circuit is used for responding to the third control signal and conducting the connection between the second end of the current transformation circuit and the storage battery so as to charge the storage battery through the first target direct current signal.

In some embodiments, the power supply control module is configured to generate the third control signal and the fourth control signal when the working mode of the special vehicle is a second type mode and the electric quantity of the storage battery is greater than or equal to a second threshold;

The battery control circuit is used for responding to the third control signal and conducting connection between the second end of the current transformation circuit and the storage battery so that the storage battery provides a reverse direct current signal for the current transformation circuit;

the converter circuit is used for responding to the fourth control signal, carrying out amplitude adjustment on the reverse direct current signal to obtain a direct current signal with a first amplitude, carrying out inversion on the direct current signal with the first amplitude to obtain a three-phase reverse alternating current signal, and transmitting the three-phase reverse alternating current signal to the flywheel motor;

the flywheel motor is used for driving the crankshaft based on the three-phase reverse alternating current signal so as to increase the output torque of the crankshaft.

In some embodiments, the rotor of the flywheel motor is also connected to the transmission of the specialty vehicle through the clutch of the specialty vehicle;

the flywheel motor is also used for transmitting the torque output by the crankshaft to the clutch so as to transmit the torque to the transmission through the clutch and then to the drive axle of the special vehicle, thereby realizing the control of the special vehicle.

In some embodiments, the converter circuit includes a reversible rectifier and a first direct current converter; the stator of the flywheel motor is connected with the first end of the reversible rectifier; the second end of the reversible rectifier is connected with the first end of the first direct current converter; the second end of the first direct current converter is connected with the first end of the power conversion module, the first power supply interface and the first end of the battery control circuit; the power supply control module is connected with the reversible rectifier and the first direct current converter through the communication bus; the first control signal includes a first sub-signal and a second sub-signal;

The flywheel motor is used for generating a three-phase alternating current signal based on the torque output by the crankshaft and outputting the three-phase alternating current signal to the reversible rectifier;

the reversible rectifier is used for responding to the first sub-signal to carry out synchronous rectification on the three-phase alternating current signal so as to obtain a direct current signal with the first amplitude;

the first direct current converter is configured to respond to the second sub-signal to perform amplitude adjustment on the direct current signal with the first amplitude, so as to obtain the first target direct current signal, and provide the first target direct current signal to the first power supply interface and the power conversion module, so that the first target direct current signal is provided to a first load corresponding to the first power supply interface;

the battery control circuit is used for responding to the third control signal and conducting connection between the first direct current converter and the storage battery so as to charge the storage battery through the first target direct current signal.

In some embodiments, the fourth control signal includes a third sub-signal and a fourth sub-signal;

the battery control circuit is used for responding to a third control signal and conducting connection between the first direct current converter and the storage battery so that the storage battery provides a reverse direct current signal for the first direct current converter;

The first direct current converter is used for responding to the third sub-signal and carrying out amplitude adjustment on the reverse direct current voltage signal to obtain a direct current signal with the first amplitude;

and the reversible rectifier is used for responding to the fourth sub-signal and carrying out three-phase inversion on the direct current signal with the first amplitude to obtain the three-phase reverse alternating current signal.

In some embodiments, the power conversion module includes an inverter and a second dc converter; the input end of the inverter and the input end of the second direct current converter are both connected with the second end of the converter circuit; the second power supply interface comprises an alternating current interface and a direct current interface; the second load comprises a direct current load and an alternating current load; the power supply control module is respectively connected with the control ends of the inverter and the second direct current converter through the communication bus; the second control signal includes a fifth sub-signal and a sixth sub-signal; the output end of the inverter is connected with the alternating current interface; the output end of the second direct current converter is connected with the direct current interface;

the converter circuit is used for responding to the first control signal, converting the three-phase alternating current signal into the first target direct current signal and providing the first target direct current signal to the first power supply interface, the input end of the inverter and the input end of the second direct current converter so as to provide the first target direct current signal to a first load corresponding to the first power supply interface;

The inverter is configured to respond to the fifth sub-signal, perform a first signal transformation on the first target dc signal, obtain the target ac signal, and provide the target ac signal to the ac interface, so as to provide the target ac signal to the ac load;

and the second direct current converter is used for responding to the sixth sub-signal, carrying out second signal conversion on the first target signal, obtaining the second target direct current signal, and providing the second target direct current signal to the direct current interface so as to provide the second target direct current signal to the direct current load.

In some embodiments, the first power interface, the dc interface, and the ac interface are a 48V dc interface, a 24V dc interface, and a 380V/220V ac interface, respectively;

correspondingly, the first load, the direct current load and the alternating current load are respectively 48V direct current load, 24V direct current load and 380V/220V alternating current load.

In some embodiments, the first type of modes include at least a drive power generation mode and a park power generation mode; the second type of modes include at least a start-up mode and a battery assist mode.

In a second aspect, an embodiment of the present application provides a power supply method, which is applied to the power supply system, where the method includes:

The power supply control module acquires a working mode of a special vehicle, and generates a first control signal and a second control signal under the condition that the working mode of the special vehicle is a first type mode representing power generation;

the flywheel motor generates a three-phase alternating current signal based on the torque output by the crankshaft and outputs the three-phase alternating current signal to the converter circuit;

the converter circuit responds to the first control signal, converts the three-phase alternating current signal into a first target direct current signal and provides the first target direct current signal to a first power supply interface and a power conversion module so as to provide the first target direct current signal to a first load corresponding to the first power supply interface;

the power conversion module responds to the second control signal to perform first signal conversion on the first target direct current signal to obtain a target alternating current signal; and carrying out second signal transformation on the first target signal to obtain a second target direct current signal, and providing the target alternating current signal and the second target direct current signal to the second power supply interface so as to provide the target alternating current signal and the second target direct current signal to a second load corresponding to the second power supply interface.

In the embodiment of the application, when the special vehicle is in a working state, the power supply control module can acquire the working mode of the special vehicle, and when the working mode of the special vehicle is a first mode representing power generation, a first control signal and a second control signal are generated no matter whether the working mode of the special vehicle is in a driving state or a parking state; in this way, the flywheel motor can generate a three-phase alternating current signal to the converter circuit based on the torque output by the crankshaft, and the converter circuit responds to a first control signal to convert the three-phase alternating current signal into a first target direct current signal to be provided for the first power supply interface so as to provide the first target direct current signal for a first load corresponding to the first power supply interface; the power conversion module responds to the second control signal to perform first signal conversion on the first target direct current signal to obtain a target alternating current signal; and carrying out second signal transformation on the first target signal to obtain a second target direct current signal, and providing the target alternating current signal and the second target direct current signal to the second power supply interface so as to provide the target alternating current signal and the second target direct current signal to a second load corresponding to the second power supply interface. Thus, the driving power generation and the parking power generation can be realized.

Meanwhile, as the rotor of the flywheel motor is arranged on the crankshaft of the engine of the special vehicle instead of the engine flywheel, and the stator of the flywheel motor is arranged on the shell of the engine, the base of the special vehicle is not required to be refitted, the structure is compact, and the model authentication of the special vehicle is facilitated.

Drawings

FIG. 1 is a schematic diagram of a power generation system according to an embodiment of the present application;

FIG. 2 is a schematic block diagram of a flywheel motor system according to an embodiment of the present application;

fig. 3 is a schematic diagram of a composition structure of a special vehicle system with a flywheel motor system according to an embodiment of the present application;

fig. 4 is a schematic diagram of a specific operation mode conversion of a special vehicle according to an embodiment of the present application;

FIG. 5a is a schematic diagram of a starting mode of a special vehicle based on a flywheel motor power supply system according to an embodiment of the present application;

fig. 5b is a schematic diagram of operation of a driving power generation mode of a special vehicle based on a flywheel motor power supply system according to an embodiment of the present application;

FIG. 5c is a schematic diagram illustrating the operation of a power assist mode of a specific vehicle based on a flywheel motor power supply system according to an embodiment of the present application;

Fig. 5d is a schematic working diagram of a parking power generation mode of a special vehicle based on a flywheel motor power supply system according to an embodiment of the present application;

fig. 5e is a schematic diagram of a charging mode operation of a specific vehicle based on a flywheel motor power supply system according to an embodiment of the present application;

fig. 6 is a schematic diagram of a power supply method implementation flow according to an embodiment of the present application.

Detailed Description

The power supply system provided by the embodiment of the application is described in detail below through specific embodiments and application scenes thereof with reference to the accompanying drawings.

With the development of electrification of automobiles, vehicle-mounted electric equipment of special vehicles is more and more, and the electric power demand is more and more. For example, special vehicles such as shower vehicles, communication relay vehicles, cooking vehicles and the like have at least 10kW (kilowatts) of electric power demand, and the maximum power supply capacity of a common vehicle-mounted generator is 3kW, so that the demand cannot be met obviously. In order to meet the electricity demand of special vehicles, related technicians propose various schemes for installing a power generation device on the existing vehicles, and the schemes mainly comprise the following three schemes:

scheme 1: and a scheme of power taking and power generation from a power taking port of the gearbox. The scheme is that a power takeoff is additionally arranged at a power take-off port, then a transmission shaft is adopted to transmit force to a generator arranged on a chassis, the generator directly outputs 220V (volt)/5 Hz (hertz) three-phase alternating current, a voltage regulator regulates the amplitude of output voltage of the generator, and an electronic speed regulator ensures the rotating speed requirement when an engine generates power. The scheme can only be used for parking power generation, and the parking power generation system has a driving and parking interlocking function, namely, the parking power generation system can be started only when the chassis hand brake is in a braking state; and when the parking power generation state is in, the hand brake is put down, and the parking power generation system automatically exits. Because of the space limitation of the engine room, the scheme has limited power generation power, needs to adopt a high-power density generator, has higher technical threshold, and adopts an imported generator for the light high-speed motor vehicle, so that the complete localization of parts cannot be realized. Because the shaft belt is driven by the self-power generation system generally by adopting the synchronous transmission of the transmission belt, the generator is easy to generate a phenomenon of lost rotation, the power generation efficiency and the power generation quality are influenced, and the service life of the belt is also a short plate for influencing the reliability of the power generation system.

Scheme 2: and power is generated by taking force from the front end of the engine through a belt. According to the scheme, the double belt drives the double motors to generate electricity, the power-increasing integrated machine is controlled to stably output electric energy, and the power-increasing integrated machine is matched with the function of a 48V storage battery pack to provide alternating current and direct current power for vehicle-mounted equipment in the parking and driving processes of a vehicle. This scheme needs to install power take-off and transmission shaft additional, and occupation space is big, and can't driving electricity generation. The generator adopts a general type excitation and permanent magnet generator, and the volume and the quality of the generator are overlarge due to the fact that the generator is not optimally designed by special application, the arrangement space is limited, and the promotion of the generated power is influenced, for example, the quality of the medium-sized high-mobility 8kW excitation generator reaches approximately 130kg (kilograms), and the volume reaches 54 liters; the mass of the 24kW permanent magnet generator is 150kg, and the volume reaches 68 liters. Part of refitted enterprises have the phenomenon of randomly changing the technical state of the chassis, so that the performance of the chassis is reduced, and the normal operation of a vehicle transmission system is influenced. For example, the camouflage working vehicle adopts a form of power generation by taking force from a transfer case, and when parking is completed, the transmission is difficult to engage when shifting to a driving state.

Scheme 3: and taking force from the transmission shaft to generate electricity. According to the scheme, a set of generator is additionally arranged between an engine flywheel and a clutch, and then voltage is converted into 220V/380V alternating current and 24V direct current through power conversion, so that parking power supply and driving power supply of vehicle-mounted equipment are realized. This solution, although having the advantage of high power supply, requires a great modification of the chassis of the vehicle, including: the gearbox moves backwards, the transmission shaft is lengthened and shortened, and meanwhile, a frame beam and the like are needed to be changed. This makes it difficult for the vehicle to pass the pattern authentication.

Based on the above technical problems, an embodiment of the present application provides a power generation system, which is applied to a special vehicle, as shown in fig. 1, and the power supply system includes: the flywheel motor 10, the power conversion module 11, the power supply control module 12, the first power supply interface 13, the second power supply interface 14 and the communication bus 15; the flywheel motor module 10 comprises a flywheel motor 101 and a variable current circuit 102; the power supply control module 12 is respectively connected with the control ends of the converter circuit 102 and the power change module 11 through the communication bus 15; the rotor of the flywheel motor 102 is arranged on a crankshaft of an engine of the special vehicle instead of an engine flywheel; the stator of the flywheel motor 102 is arranged on the shell of the engine and is connected with the first end of the variable current circuit 102; a second end of the current transformation circuit 102 is connected with a first end of the power transformation module 11 and the first power supply interface 13; a second end of the power conversion module 11 is connected with the second power supply interface 14;

the power supply control module 12 is configured to obtain an operation mode of the special vehicle, and generate a first control signal and a second control signal when the operation mode of the special vehicle is a first type of mode that indicates power generation;

The flywheel motor 101 is configured to generate a three-phase ac signal based on the torque output by the crankshaft, and output the three-phase ac signal to the converter circuit 102;

the converter circuit 102 is configured to convert the three-phase ac signal into a first target dc signal in response to the first control signal, and provide the first target dc signal to the first power supply interface 13 and the power conversion module 11, so as to provide the first target dc signal to a first load corresponding to the first power supply interface 13;

the power conversion module 11 is configured to perform a first signal conversion on the first target dc signal in response to the second control signal, to obtain a target ac signal; and performing second signal conversion on the first target signal to obtain a second target direct current signal, and providing the target alternating current signal and the second target direct current signal to the second power supply interface 14 so as to provide the target alternating current signal and the second target direct current signal to a second load corresponding to the second power supply interface 14.

Here, the communication bus may be a regional network controller (Controller Area Network, CAN) bus; the first type of mode may be a mode in which the flywheel motor 101 is in a power generation state.

In some possible embodiments, the first type of modes include at least a driving power generation mode and a parking power generation mode.

It is understood that the first power supply interface 13 may be a 48V dc interface; the first load may be a 48V dc load; the second power supply interface 14 may include an ac interface for outputting a target ac signal and a dc interface for outputting a second target dc signal.

In some embodiments, the power control module 12 may also be connected to an engine controller of an engine in a specialty vehicle via the communication bus 15.

The embodiment of the application provides a power supply system applied to a special vehicle, which comprises:

the device comprises a flywheel motor, a power conversion module, a power supply control module, a first power supply interface, a second power supply interface, a communication bus and a battery module; the flywheel motor module comprises a flywheel motor and a variable current circuit; the battery module comprises a battery control circuit and a storage battery; the power supply control module is respectively connected with the control ends of the variable-current circuit, the power change module and the battery control circuit through the communication bus; the rotor of the flywheel motor is arranged on a crankshaft of an engine of the special vehicle instead of an engine flywheel; the stator of the flywheel motor is arranged on the shell of the engine and is connected with the first end of the variable current circuit; the second end of the current transformation circuit is respectively connected with the first end of the power conversion module, the first power supply interface and the first end of the battery control circuit; the second end of the battery control circuit is connected with the storage battery; the second end of the power conversion module is connected with the second power supply interface;

The power supply control module is used for acquiring the working mode of the special vehicle and the electric quantity of the storage battery, and generating a first control signal, a second control signal and a third control signal when the working mode of the special vehicle is a first type mode representing power generation and the electric quantity of the storage battery is smaller than or equal to a first threshold value;

the battery control circuit is used for responding to the third control signal and conducting connection between the first target direct current signal and the storage battery so as to charge the storage battery through the first target direct current signal;

Here, the first threshold may be 60% or 50%. The third control signal is used for controlling the secondary battery in the battery module to be charged.

In some possible embodiments, the battery control circuit may include a switching tube connected across the second end of the current transformation circuit and between the battery cells. The switching tube may be a metal oxide semiconductor field effect transistor (Metal OxideSemiconductor Field Effect Transistor, MOFET) tube.

In one embodiment, the battery may be a 48V lead acid battery or a nickel chromium battery.

In the embodiment of the application, the power supply control module is used for acquiring the working mode of the special vehicle and the electric quantity of the storage battery, and generating a third control signal when the working mode of the special vehicle is a first type mode and the electric quantity of the storage battery is smaller than or equal to a first threshold value; and the battery control circuit is controlled by the third control signal, and the connection between the second end of the current transformation circuit and the storage battery is conducted, so that the storage battery can be charged by the first target direct current signal. Therefore, the engine is assisted or started by the storage battery under the condition that the storage battery is full in electric quantity.

The embodiment of the application provides another power supply system applied to a special vehicle, which comprises:

the power supply control module is used for acquiring the working mode of the special vehicle and the electric quantity of the storage battery, and generating the third control signal and the fourth control signal under the condition that the working mode of the special vehicle is a second type mode and the electric quantity of the storage battery is greater than or equal to a second threshold value;

the converter circuit is used for responding to the fourth control signal, carrying out amplitude adjustment on the reverse direct current signal to obtain a direct current signal with a first amplitude, carrying out inversion on the direct current signal with the first amplitude to obtain a three-phase reverse alternating current signal, and transmitting the three-phase reverse alternating current signal to a stator of the flywheel motor;

In some embodiments, the second type of modes includes at least a start-up mode and a battery assist mode.

In some possible embodiments, the second threshold may be 90%, or any value greater than 90%.

It will be appreciated that in the event that the charge level of the battery is greater than the second threshold, the voltage of the battery is greater than the voltage at the second end of the current transformer circuit, and therefore the battery provides a reverse dc electrical signal to the current transformer circuit with the second end of the current transformer circuit and the battery being turned on.

In some possible embodiments, the current transformation circuit transmits the obtained three-phase reverse alternating current signal to a stator (stator winding) of the flywheel motor, so that the flywheel motor can drive a rotor of the flywheel motor under the condition that the voltage on the stator winding is increased, and further drive a crankshaft of an engine provided with the rotor to increase the output torque of the crankshaft.

In the embodiment of the application, when the working mode of the special vehicle is a second type mode and the electric quantity of the storage battery is larger than or equal to a second threshold value, the power supply control module generates the third control signal and the fourth control signal, and the battery control circuit is controlled by the third control signal to conduct the connection between the second end of the converter circuit and the storage battery, so that the storage battery provides a reverse direct current signal for the converter circuit; the reverse direct current signal is controlled by a fourth control signal to carry out amplitude adjustment on the reverse direct current signal to obtain a direct current signal with a first amplitude, and the direct current signal with the first amplitude is inverted to obtain a three-phase reverse alternating current signal which is transmitted to the flywheel motor; further, the flywheel motor may drive the crankshaft based on the three-phase reverse ac signal to increase the output torque of the crankshaft. In this way, the assistance of the engine or the starting of the engine can be achieved.

the device comprises a flywheel motor, a power conversion module, a power supply control module, a first power supply interface, a second power supply interface and a communication bus; the flywheel motor module comprises a flywheel motor and a variable current circuit; the power supply control module is respectively connected with the control ends of the variable-current circuit and the power change module through the communication bus; the rotor of the flywheel motor is arranged on a crankshaft of an engine of the special vehicle instead of an engine flywheel; the rotor of the flywheel motor is also connected with a transmission of the special vehicle through a clutch of the special vehicle; the stator of the flywheel motor is arranged on the shell of the engine and is connected with the first end of the variable current circuit; the second end of the converter circuit is connected with the first end of the power conversion module and the first power supply interface; the second end of the power conversion module is connected with the second power supply interface;

the flywheel motor is also used for transmitting the torque output by the crankshaft to the clutch so as to transmit the torque to the transmission through the clutch and then to the drive axle of the special vehicle, thereby realizing the control of the special vehicle;

In the embodiment of the application, the rotor of the flywheel motor is also connected with the speed changer of the special vehicle through the clutch of the special vehicle, so that the flywheel motor can transmit the torque output by the crankshaft to the clutch, so that the torque is transmitted to the speed changer through the clutch and then transmitted to the drive axle of the special vehicle, the control of the special vehicle is realized, and the driving power generation is finally realized.

the device comprises a flywheel motor, a power conversion module, a power supply control module, a first power supply interface, a second power supply interface, a communication bus and a battery module; the flywheel motor module comprises a flywheel motor and a variable current circuit; the converter circuit comprises a reversible rectifier and a first direct current converter; the battery module comprises a battery control circuit and a storage battery; the power supply control module is respectively connected with the reversible rectifier, the first direct current converter, the power change module and the control end of the battery control circuit through the communication bus; the rotor of the flywheel motor is arranged on a crankshaft of an engine of the special vehicle instead of an engine flywheel; the stator of the flywheel motor is arranged on the shell of the engine and is connected with the first end of the reversible rectifier; the second end of the reversible rectifier is connected with the first end of the first direct current converter; the second end of the first direct current converter is connected with the first end of the power conversion module, the first power supply interface and the first end of the battery control circuit; the second end of the battery control circuit is connected with the storage battery; the second end of the power conversion module is connected with the second power supply interface;

The power supply control module is used for acquiring the working mode of the special vehicle and the electric quantity of the storage battery, and generating a first control signal, a second control signal and a third control signal under the condition that the working mode of the special vehicle is a first type mode and the electric quantity of the storage battery is smaller than or equal to a first threshold value; the first control signal includes a first sub-signal and a second sub-signal;

the first direct current converter is configured to respond to the second sub-signal to perform amplitude adjustment on the direct current signal with the first amplitude, so as to obtain the first target direct current signal, and provide the first target direct current signal to the first power supply interface, the power conversion module and the battery control circuit, so that the first target direct current signal is provided to a first load corresponding to the first power supply interface;

the battery control circuit is used for responding to the third control signal and conducting connection between the first direct current converter and the storage battery so as to charge the storage battery through the first target direct current signal;

In the embodiment of the application, a power supply control module acquires the working mode of the special vehicle and the electric quantity of the storage battery, and generates a first control signal, a second control signal and a third control signal when the working mode of the special vehicle is a first type mode and the electric quantity of the storage battery is smaller than or equal to a first threshold value; the first control signal includes a first sub-signal and a second sub-signal; the flywheel motor generates a three-phase alternating current signal based on the torque output by the crankshaft and outputs the three-phase alternating current signal to the reversible rectifier; the three-phase alternating current signal is subjected to synchronous rectification in response to the first sub-signal through the reversible rectifier, and a direct current signal with the first amplitude is obtained; the first direct current converter responds to the second sub-signal to conduct amplitude adjustment on the direct current signal with the first amplitude, the first target direct current signal is obtained and provided for the first power supply interface, the power conversion module and the battery control circuit, and the first target direct current signal is provided for a first load corresponding to the first power supply interface; the battery control circuit is responsive to the third control signal to turn on the connection between the first dc converter and the battery to charge the battery with the first target dc signal. Therefore, the engine is assisted or started by the storage battery under the condition that the storage battery is full in electric quantity.

The embodiment of the application provides other power supply systems applied to special vehicles, which comprise:

The power supply control module is used for generating the third control signal and the fourth control signal under the condition that the working mode of the special vehicle is a second type mode and the electric quantity of the storage battery is larger than or equal to a second threshold value; the fourth control signal includes a third sub-signal and a fourth sub-signal;

the battery control circuit is used for responding to the third control signal and conducting connection between the first direct current converter and the storage battery so that the storage battery provides a reverse direct current signal for the first direct current converter;

the reversible rectifier is used for responding to the fourth sub-signal and carrying out three-phase inversion on the direct current signal with the first amplitude to obtain the three-phase reverse alternating current signal;

In the embodiment of the application, the power supply control module generates the third control signal and the fourth control signal under the condition that the working mode of the special vehicle is a second type mode and the electric quantity of the storage battery is more than or equal to a second threshold value; the fourth control signal includes a third sub-signal and a fourth sub-signal; a battery control circuit responsive to the third control signal to turn on a connection between the first dc converter and the battery such that the battery provides a reverse dc signal to the first dc converter; the first direct current converter responds to the third sub-signal, and adjusts the amplitude of the reverse direct current voltage signal to obtain a direct current signal with the first amplitude; the reversible rectifier responds to the fourth sub-signal and performs three-phase inversion on the direct current signal with the first amplitude to obtain the three-phase reverse alternating current signal; a flywheel motor drives the crankshaft based on the three-phase reverse AC signal to increase an output torque of the crankshaft. In this way, the assistance of the engine or the starting of the engine can be achieved.

the device comprises a flywheel motor, a power conversion module, a power supply control module, a first power supply interface, a second power supply interface and a communication bus; the flywheel motor module comprises a flywheel motor and a variable current circuit; the power conversion module comprises an inverter and a second direct current converter; the power supply control module is respectively connected with the control ends of the converter circuit, the inverter and the second direct current converter through the communication bus; the rotor of the flywheel motor is arranged on a crankshaft of an engine of the special vehicle instead of an engine flywheel; the stator of the flywheel motor is arranged on the shell of the engine and is connected with the first end of the variable current circuit; the second end of the converter circuit is connected with the input end of the inverter, the input end of the second direct current converter and the first power supply interface; the output end of the inverter is connected with an alternating current interface; the output end of the second direct current converter is connected with a direct current interface;

the power supply control module is used for acquiring the working mode of the special vehicle, and generating a first control signal and a second control signal under the condition that the working mode of the special vehicle is a first type mode; the second control signal includes a fifth sub-signal and a sixth sub-signal;

the converter circuit is used for responding to the first control signal, converting the three-phase alternating current signal into a first target direct current signal and providing the first target direct current signal to the first power supply interface, the input end of the inverter and the input end of the second direct current converter so as to provide the first target direct current signal to a first load corresponding to the first power supply interface;

In some embodiments, the DC interface and the AC interface are a 24V DC interface and a 380V/220V AC interface, respectively. Correspondingly, the direct current load and the alternating current load are respectively 24V direct current load and 380V/220V alternating current load.

In the embodiment of the application, since the second control signal includes a fifth sub-signal and a sixth sub-signal, the inverter responds to the fifth sub-signal to perform a first signal conversion on the first target dc signal, so as to obtain the target ac signal, and the target ac signal is provided to the ac interface, so that the target ac signal is provided to the ac load; and the second direct current converter responds to the sixth sub-signal, performs second signal conversion on the first target signal, obtains the second target direct current signal and provides the second target direct current signal to the direct current interface so as to provide the second target direct current signal to the direct current load. In this way, power supply to both the dc load and the ac load can be achieved.

Fig. 2 is a schematic block diagram of a flywheel motor system according to an embodiment of the present application, and as shown in fig. 2, a flywheel motor power supply system mainly includes:

flywheel motor 20: flywheel motor 201, pulse-Width Modulation (PWM) reversible rectifier module 202, ac 1 cable 203, DC 1 cable 204, bi-directional DC/DC module 205;

the power conversion module 21: inverter modules 212, 24V Direct Current (DC)/DC modules 213, 48V cable 214, 380V/220V AC cable 215, 380V/220V AC (Alternating Current, AC) interface 216, 24V DC cable 217, 24V DC interface 218, 48V DC interface 211; a battery module 22; a CAN bus 23; the integrated power control module 24.

The flywheel motor 201 mainly comprises a stator and a rotor, wherein the stator is arranged on the engine shell, and the rotor replaces the original flywheel and is directly connected with the engine crankshaft;

the PWM reversible rectifier module 202 can realize electric control and synchronous rectification control in power generation;

the bidirectional DC/DC module 205 can step down by using a BUCK circuit when the flywheel motor system generates power, so that the input bidirectional DC/DC voltage is stabilized at 48V, and step up the 48V to the working voltage of the flywheel motor 201 by using a Boost circuit when the flywheel motor system is electrically operated;

the inverter module 212 inverts the 48V DC power into 380V/220V AC power to power the vehicle-mounted electric equipment;

the 24V DC/DC module 213 reduces the 48V power to 24V to supply power for other 24V devices on the vehicle;

the power conversion module 21 mainly converts the 48V DC power into 380/220V AC power and 24V DC power through the inverter module 212 and the 24VDC/DC module 213, respectively, and provides the 380V/220V AC power and 48V, 24V DC power to the vehicle device through the 380V/220V AC interface 216 and the 24V DC interface 218, respectively.

On the basis of the above embodiment, the embodiment of the present application provides a special vehicle system with a flywheel motor system, as shown in fig. 3, which includes not only the flywheel power supply system shown in fig. 2, but also a power transmission module (not shown in fig. 3);

The power transmission module mainly comprises: engine controller 31, engine 32, clutch 33, transmission 34, transfer case 35, transaxle 36, rear transaxle 37, front transaxle 38, front right wheel 39, front left wheel 310, middle right wheel 311, middle left wheel 312, rear right wheel 313, and rear left wheel 314. The engine power is controlled to be disconnected and connected with a drive axle (comprising a middle drive axle 36, a rear drive axle 37, a front drive axle 38 and a right front wheel 39) through a clutch 33, the clutch 33 is disconnected when a special vehicle is in parking power generation, and the comprehensive power control module 24 sends an accelerator instruction to the engine controller 31 through the CAN bus 23 to control the engine 31 to work in an optimal state; when the special vehicle is driven to generate electricity, the engine 32 is engaged with the clutch 33, and the power of the engine 32 outputs torque to the drive axle through the clutch 33, and simultaneously drives the flywheel motor 201 to generate electricity.

It will be appreciated that since the special vehicle is not only required to generate electricity but also to travel, the flywheel motor 201 is mounted on the crankshaft of the engine 32 and the rotor is also required to be mechanically connected with the transmission 34 through the clutch 33, so that the power on the crankshaft of the engine 32 is transmitted to the transmission 34 through the clutch 33; then, the power output by the transmission 34 is respectively transmitted to a middle drive axle 36, a rear drive axle 37 and a front drive axle 38 through a transfer case 35; the flywheel motor 201 is electrically connected with the PWM reversible rectifier module 202 through the ac 1 cable 203, rectifies the ac output by the flywheel motor into DC power, and the DC power fluctuates with the rotation speed of the engine 32, so that the DC power is electrically connected with the bidirectional DC/DC module 205 through the ac 1 cable 204, and is stabilized at 48V through BUCK control; meanwhile, the bidirectional DC/DC module 205 can also work in a Boost mode, the voltage of the 48V storage battery is boosted to a proper voltage and is input to the PWM reversible rectifier module 202, and the flywheel motor 201 is driven by the PWM reversible rectifier module 202, so that the starting and the power assisting of the engine 32 are realized.

The battery module 22 is electrically connected to the bi-directional DC/DC module 105 via a 48V cable 214, primarily to provide electrical power during engine start and boost;

the integrated power control module 24 mainly establishes communication with other controllers of the system (including controllers of the engine controller 31, the PWM reversible rectifier module 202, the bidirectional DC/DC module 105, the inverter module 212 and the 24V DC/DC module 213) through the CAN bus 23, and performs energy management of the system to realize energy optimization control;

the power transmission module 2 mainly includes: the engine controller 21, the engine 22, the clutch 23, the transmission 24, the transfer case 25, the transaxle 26, the rear transaxle 27, the front transaxle 28, the right front wheel 29, the left front wheel 210, the right middle wheel 211, the left middle wheel 212, the right rear wheel 213, and the left rear wheel 214. The engine power is controlled to be disconnected and connected with the drive axle through the clutch, the clutch is disconnected when the parking power generation is performed, and the comprehensive power control module 6 sends an accelerator instruction to the engine controller 21 through the CAN bus 5 to control the engine 21 to work in an optimal state; when the vehicle is running, the clutch of the engine 22 is engaged, and the engine power outputs torque to the drive axle through the clutch, and drives the flywheel motor 11 to generate power.

It will be appreciated that the main modes of operation of a specialty vehicle include: the conditions for direct conversion of each operating mode to each other are shown in table 1.

TABLE 1

Fig. 4 is a schematic diagram of a specific operation mode conversion of a special vehicle according to an embodiment of the present application, where, as shown in fig. 4, the specific operation mode conversion of the special vehicle completely corresponds to that shown in table 1.

Fig. 5a is a schematic working diagram of a starting mode of a specific vehicle based on a flywheel motor power supply system according to an embodiment of the present application, where, as shown in fig. 5a, the starting mode of the specific vehicle is that, on the basis of the specific vehicle system with the flywheel motor system shown in fig. 3, it is determined that an ignition key of an automobile is turned on, and when the working mode of the specific vehicle enters a starting mode b (see table 1 and fig. 4) from a shutdown mode a, a specific working process (energy flow direction) of the flywheel motor power supply system is performed. As can be seen, in the case where the operation mode of the special vehicle is changed from the stop mode a to the start mode b, the battery module 22 supplies power (inputs 48V direct current) to the bidirectional DC/DC module 205, the bidirectional DC/DC module 205 boosts the input 48V power to the operation voltage of the flywheel motor 201, and supplies the operation voltage of the flywheel motor 201 to the PWM reversible rectifier module 202; the PWM reversible rectifier module 202 inverts the operating voltage of the flywheel motor 201, and three-phase ac power is obtained and output to the stator (winding) of the flywheel motor 201, so as to drive the flywheel motor 201 to rotate, and further drag the engine 32 to complete starting.

It will be appreciated that in the start-up mode, the power conversion module 21 is inactive. The flow direction of the energy of the flywheel motor power supply system is as follows: battery module 22-bi-directional DC/DC module 205-PWM reversible rectifier module 202-flywheel motor 201-engine 32.

Here, when the special vehicle is in the starting mode b, the integrated power control module 24 is also in an operating state, and generates a control signal of the first mode corresponding to the starting mode b according to the operating mode starting mode b of the special vehicle; and transmits the control signal of the first mode to the bi-directional DC/DC module 205 and the PWM reversible rectifier module 202 in the flywheel motor 20 through the CAN bus 23.

Fig. 5b is a schematic diagram of a driving power generation mode of a special vehicle based on a flywheel motor power supply system according to an embodiment of the present application, where, as shown in fig. 5b, the driving power generation mode of the special vehicle is based on the special vehicle system with the flywheel motor system shown in fig. 3, after the special vehicle is started successfully, the system determines whether the parking power generation switch is turned on, and determines that the parking power generation switch is not turned on, and when the working mode of the special vehicle enters the driving power generation mode c (see table 1 and fig. 4) from the starting mode b, the specific working process (energy flow direction) of the flywheel motor power supply system is performed.

As can be seen, when the operation mode of the special vehicle is changed from the start mode b to the driving power generation mode c, the accelerator of the engine 32 is controlled by the driver, and the flywheel motor 201 changes with the rotation speed of the engine 32, so that the three-phase voltage output to the PWM reversible rectifier module 202 also fluctuates; further, the direct current rectified by the PWM reversible rectifier module 202 also fluctuates with the rotational speed of the engine 32. At this time, the integrated power control module 24 may generate a corresponding control signal to control the bidirectional DC/DC module 205 to stabilize the output voltage of the bidirectional DC/DC module 205 at about 48V; then the 48V direct current is converted into 380V/220V alternating current and 24V direct current through the power conversion module 21;

it can be understood that in the driving power generation mode c, the flow direction of the energy of the flywheel motor power supply system is: the engine 32-flywheel motor 201-PWM reversible rectifier module 202-bi-directional DC/DC module 205-inverter module 212/24VDC/DC module 213-380V/220V AC interface 216/24V DC interface 218.

Here, after energy is output from the bi-directional DC/DC module 205 (48V direct current), the inverter module 212 and the 24VDC/DC module 213 may be entered at the same time; the 48V direct current entering the inverter module 212 is converted into 380V/220V alternating current through the inverter module 212 and is output to a 380V/220VAC interface; the 48V DC power entering the 24VDC/DC module 213 is converted to 24V DC power by the 24VDC/DC module 213 and output to the 24V DC interface 218.

Meanwhile, after the energy is output from the bi-directional DC/DC module 205 (48V direct current), it may be directly output to the 48V DC interface 211 and supplied to the battery module 22 to charge the secondary battery in the battery module 22. Of course, whether or not to charge needs to be determined according to the amount of electricity of the storage battery.

Here, when the special vehicle is in the driving power generation mode c, the integrated power control module 24 is also in an operating state, and generates a control signal of a second mode corresponding to the driving power generation mode c according to the driving power generation mode c of the special vehicle; and transmits the control signal of the second mode to the bidirectional DC/DC module 205 and the PWM reversible rectifier module 202 in the flywheel motor 20 and the inverter modules 212 and 24VDC/DC module 213 in the power conversion module 21 through the CAN bus 23.

As can also be seen from fig. 5b, in the case that the special vehicle is in the driving power generation mode c, the engine controller 31 receives the accelerator control signal input by the driver, and controls the engine 32 to output torque and rotation speed according to the accelerator control signal; the flywheel motor 201 transmits power to the middle drive axle 36, the rear drive axle 37 and the front drive axle 38 through the clutch 33, the transmission 34 and the transfer case 35 in sequence along with the torque change of the engine output; finally, the right front wheel 39, the left front wheel 310, the right middle wheel 311, the left middle wheel 312, the right rear wheel 313 and the left rear wheel 314 are driven by the center drive axle 36, the rear drive axle 37 and the front drive axle 38.

Fig. 5c is a working schematic diagram of a power assisting mode of a special vehicle based on a flywheel motor power supply system according to an embodiment of the present application, as shown in fig. 5c, in the power assisting mode of the special vehicle, on the basis of the special vehicle system with the flywheel motor system shown in fig. 3, when the special vehicle is in a driving power generation mode c, and when it is determined that the vehicle is suddenly accelerated and the electric quantity of the storage battery is sufficient (higher than a preset high electric quantity threshold), the special vehicle system immediately enters a power assisting mode f (see table 1 and fig. 4) from the driving power generation mode c, and the specific working process (energy flow direction) of the flywheel motor power supply system is performed.

Here, the traveling speed of the vehicle and the electric quantity of the storage battery in the battery module 22 may be monitored in real time by the integrated power control module 24, and in the case where it is determined that the vehicle belongs to sudden acceleration (the speed change per second reaches the preset speed threshold value), and the electric quantity of the storage battery is greater than the preset high electric quantity threshold value, it is determined that the special vehicle system enters the assist mode f.

It will be appreciated that the special vehicle enters the drive power generation mode c after the assistance of the engine 32 is completed.

As can be seen, in the case where the operation mode of the special vehicle is changed from the driving power generation mode c to the assist mode f, the battery module 22 supplies power (inputs 48V direct current) to the bidirectional DC/DC module 205, the bidirectional DC/DC module 205 boosts the input 48V power to the operation voltage of the flywheel motor 201, and supplies the operation voltage of the flywheel motor 201 to the PWM reversible rectifier module 202; the PWM reversible rectifier module 202 inverts the working voltage of the flywheel motor 201, and obtains three-phase alternating current to be output to the stator (winding) of the flywheel motor 201, so as to drive the flywheel motor 201 to rotate, and drag the engine 32 to realize power assistance.

It can be understood that in the assist mode f, the flow direction of the energy of the flywheel motor power supply system is: battery module 22-bi-directional DC/DC module 205-PWM reversible rectifier module 202-flywheel motor 201-engine 32.

Here, when the special vehicle is in the assist mode f, the integrated power control module 24 is also in an operating state, and generates a control signal of a third mode corresponding to the assist mode f; and transmits the control signal of the third mode to the bi-directional DC/DC module 205 and the PWM reversible rectifier module 202 in the flywheel motor 20 through the CAN bus 23.

It will be appreciated that, in the case where the special vehicle is in the assist mode f, the special vehicle is running, the engine controller 31 receives the accelerator control signal input by the driver, and controls the engine 32 to output torque and rotation speed according to the accelerator control signal; the flywheel motor 201 transmits power to the middle drive axle 36, the rear drive axle 37 and the front drive axle 38 through the clutch 33, the transmission 34 and the transfer case 35 in sequence along with the torque change of the engine output; finally, the right front wheel 39, the left front wheel 310, the right middle wheel 311, the left middle wheel 312, the right rear wheel 313 and the left rear wheel 314 are driven by the center drive axle 36, the rear drive axle 37 and the front drive axle 38.

As can also be seen in fig. 5c, in the case of a special vehicle in boost mode f, the battery module 22 will also provide a 48V DC input to the bi-directional DC/DC module 205, and the 24V DC/DC module 213 will convert the 48V DC input to a 24V DC output to the 24V DC interface 218.

Fig. 5d is a schematic working diagram of a parking power generation mode of a specific vehicle based on a flywheel motor power supply system according to an embodiment of the present application, where, as shown in fig. 5, the parking power generation mode of the specific vehicle is based on the specific vehicle system with the flywheel motor system shown in fig. 3, after the specific vehicle is started successfully, the system determines whether the parking power generation switch is turned on, and determines that the parking power generation switch is turned on, and when the working mode of the specific vehicle enters the parking power generation mode d (see table 1 and fig. 4) from the starting mode b, the specific working process (energy flow direction) of the flywheel motor power supply system is performed.

As CAN be seen, when the working mode of the special vehicle enters the parking power generation mode d from the starting mode b, the integrated power control module 24 CAN send an accelerator control command to the engine controller 31 through the CAN bus 23 according to the current system load condition, control the engine 32 to work in the fuel optimal working state, and output the torque in the fuel optimal working state to the flywheel motor 201, so that the flywheel motor 201 outputs the correspondingly generated three-phase alternating current to the PWM reversible rectifier module 202; the voltage is rectified by the PWM reversible rectifier module 202 and then stabilized at 48V by the bi-directional DC/DC module 205. Then, the 48V direct current is converted into 380V/220V alternating current and 24V direct current by the power conversion module 21, and the 380V/220V alternating current and 24V direct current are respectively output to the 380V/220V AC interface and the 24V DC interface 218 correspondingly.

Since the flow direction of the energy of the flywheel motor power supply system in the parking power generation mode d and the flow direction of the energy in the running power generation mode c are the same, a detailed description thereof will not be given here.

It will be appreciated that the operation mode of the special vehicle is in the parking power generation mode d, and therefore the engine controller 31 does not receive the accelerator control signal input by the driver, and therefore does not drive the right front wheel 39, the left front wheel 310, the right middle wheel 311, the left middle wheel 312, the right rear wheel 313, and the left rear wheel 314.

Fig. 5e is a schematic diagram of a charging mode of a specific vehicle based on a flywheel motor power supply system according to an embodiment of the present application, where, as shown in fig. 5e, the charging mode e of the specific vehicle is based on the specific vehicle system with the flywheel motor system shown in fig. 3, and the specific vehicle is in a driving power generation mode c or a parking power generation mode d, and when it is determined that the electric quantity of the storage battery is lower (below a preset low electric quantity threshold), the specific vehicle system immediately enters the charging mode e from the driving power generation mode c or the parking legal mode d (see table 1 and fig. 4).

Here, the electric quantity of the secondary battery in the battery module 22 may be monitored in real time by the integrated power control module 24, and in the case where it is determined that the electric quantity of the secondary battery is lower than the preset low-electric-quantity threshold value, it is determined that the special vehicle system enters the charging mode e.

It can be seen that, when the working mode of the special vehicle is changed from the driving power generation mode c or the parking legal mode d to the charging mode e, the flywheel motor 201 is required to control charging current in the charging process besides supplying power to the 48V DC interface 211, the 380V/220V AC interface and the 24V DC interface 218, and when the charging is finished, the driving power generation mode c or the parking power generation mode d is automatically changed.

Since the flywheel motor 201 supplies power to the 48V DC interface 211, 380V/220V AC interface and 24V DC interface 218 in the same power flow direction as in the drive power generation mode c and the park legal mode d, the only difference is that the 48V DC power output by the bi-directional DC/DC module 205 can simultaneously supply power to the battery module 22.

On the basis of the above embodiment, the embodiment of the present application provides a power supply method applied to a power supply system of a special vehicle, as shown in fig. 6, the power supply method includes the following steps:

step S601: the power supply control module acquires a working mode of a special vehicle, and generates a first control signal and a second control signal when the working mode of the special vehicle is a first type mode;

Step S602: the flywheel motor generates a three-phase alternating current signal based on the torque output by the crankshaft and outputs the three-phase alternating current signal to the converter circuit;

step S603: the converter circuit responds to the first control signal, converts the three-phase alternating current signal into a first target direct current signal and provides the first target direct current signal to a first power supply interface and a power conversion module so as to provide the first target direct current signal to a first load corresponding to the first power supply interface;

step S604: the power conversion module responds to the second control signal to perform first signal conversion on the first target direct current signal to obtain a target alternating current signal; and carrying out second signal transformation on the first target signal to obtain a second target direct current signal, and providing the target alternating current signal and the second target direct current signal to the second power supply interface so as to provide the target alternating current signal and the second target direct current signal to a second load corresponding to the second power supply interface.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

1. A power supply system, characterized by being applied to a special vehicle; the power supply system includes: the device comprises a flywheel motor, a power conversion module, a power supply control module, a first power supply interface, a second power supply interface and a communication bus; the flywheel motor comprises a flywheel motor and a variable current circuit; the power supply control module is respectively connected with the control ends of the variable-current circuit and the power change module through the communication bus; the rotor of the flywheel motor is arranged on a crankshaft of an engine of the special vehicle instead of an engine flywheel; the stator of the flywheel motor is arranged on the shell of the engine and is connected with the first end of the variable current circuit; the second end of the converter circuit is connected with the first end of the power conversion module and the first power supply interface; the second end of the power conversion module is connected with the second power supply interface;

2. The power supply system of claim 1, further comprising a battery module, the battery module comprising a battery control circuit and a storage battery; the battery control circuit is connected between the second end of the converter circuit and the storage battery; the power supply control module is connected with the control end of the battery control circuit through the communication bus;

The power supply control module is used for acquiring the working mode of the special vehicle and the electric quantity of the storage battery, and generating a third control signal when the working mode of the special vehicle is the first type mode and the electric quantity of the storage battery is smaller than or equal to a first threshold value;

3. The power supply system according to claim 2, wherein the power supply control module is configured to generate the third control signal and the fourth control signal when the operation mode of the special vehicle is a second type mode and the electric quantity of the storage battery is equal to or greater than a second threshold value;

4. A power supply system according to any one of claims 1 to 3, characterized in that the rotor of the flywheel motor is also connected to the transmission of the special vehicle by means of a clutch of the special vehicle;

5. A power supply system according to claim 3, wherein the converter circuit comprises a reversible rectifier and a first direct current converter; the stator of the flywheel motor is connected with the first end of the reversible rectifier; the second end of the reversible rectifier is connected with the first end of the first direct current converter; the second end of the first direct current converter is connected with the first end of the power conversion module, the first power supply interface and the first end of the battery control circuit; the power supply control module is connected with the reversible rectifier and the first direct current converter through the communication bus; the first control signal includes a first sub-signal and a second sub-signal;

6. The power supply system of claim 5, wherein the fourth control signal comprises a third sub-signal and a fourth sub-signal;

7. A power supply system according to any one of claims 1 to 3, wherein the power conversion module includes an inverter and a second dc converter; the input end of the inverter and the input end of the second direct current converter are both connected with the second end of the converter circuit; the second power supply interface comprises an alternating current interface and a direct current interface; the second load comprises a direct current load and an alternating current load; the power supply control module is respectively connected with the control ends of the inverter and the second direct current converter through the communication bus; the second control signal includes a fifth sub-signal and a sixth sub-signal; the output end of the inverter is connected with the alternating current interface; the output end of the second direct current converter is connected with the direct current interface;

8. The power supply system of claim 7, wherein the first power supply interface, the dc interface, and the ac interface are a 48V dc interface, a 24V dc interface, and a 380V/220V ac interface, respectively;

9. A power supply system according to claim 3, wherein the first type of modes include at least a drive power generation mode and a park power generation mode; the second type of modes include at least a start-up mode and a battery assist mode.

10. A power supply method applied to the power supply system according to any one of claims 1 to 9, the method comprising:

the power supply control module acquires a working mode of a special vehicle, and generates a first control signal and a second control signal when the working mode of the special vehicle is a first type mode;