CN112977069A - Pre-charging and discharging system of hydrogen energy automobile and pre-charging and high-voltage discharging method thereof - Google Patents

Pre-charging and discharging system of hydrogen energy automobile and pre-charging and high-voltage discharging method thereof Download PDF

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Publication number
CN112977069A
CN112977069A CN202110298169.XA CN202110298169A CN112977069A CN 112977069 A CN112977069 A CN 112977069A CN 202110298169 A CN202110298169 A CN 202110298169A CN 112977069 A CN112977069 A CN 112977069A
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Prior art keywords
switch
charging
voltage
fuel
air compressor
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CN202110298169.XA
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Chinese (zh)
Inventor
安元元
郝义国
陈华明
余红霞
程飞
张学锋
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Huanggang Grove Hydrogen Automobile Co Ltd
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Huanggang Grove Hydrogen Automobile Co Ltd
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Priority to CN202110298169.XA priority Critical patent/CN112977069A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Fuel Cell (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a pre-charging and discharging system of a hydrogen energy automobile and a charging and high-voltage discharging method thereof. The high-voltage auxiliary power supply, the first pre-charging circuit and the motor controller are connected in series to form a closed circuit, the fuel-electric boosting FCDC is connected in parallel at two ends of the high-voltage auxiliary power supply, and the voltage-reducing DCL is connected in parallel at two ends of the motor controller; the second pre-charging circuit, the fuel electric air compressor controller and the high-voltage component are sequentially connected in series to form a branch circuit, and the branch circuit is connected in parallel to two ends of the high-voltage auxiliary power supply; the warm air PTC is connected in parallel at two ends of the high-voltage auxiliary power supply; the fuel PTC is connected in parallel with two ends of the high-voltage auxiliary power supply. Under the condition that the fuel electric air compressor controller and the high-voltage component do not have the active discharge function, the warm air PTC or the fuel electric PTC of the whole vehicle is used for discharging, so that the high-voltage discharge time of the support capacitor is shortened, the driving motor of the whole vehicle is firstly charged under high voltage without waiting for the process of purging the fuel cell system, and the pre-charging is separately carried out.

Description

Pre-charging and discharging system of hydrogen energy automobile and pre-charging and high-voltage discharging method thereof
Technical Field
The invention relates to the technical field of hydrogen energy vehicles, in particular to a pre-charging and discharging system of a hydrogen energy vehicle and a pre-charging and high-voltage discharging method thereof.
Background
The fuel cell passenger car in China has already finished commercial demonstration operation, the fuel cell passenger car is also developing at a rapid speed, various performance indexes basically meet the operation requirements, and the large-scale industrialization is started to advance. However, to promote and apply a new energy system, safety of the new energy system should be paid attention first. In the prior art, the whole vehicle driving motor and the fuel electric air compressor adopt simultaneous pre-charging, certain safety risk exists in the charging and discharging processes, and the discharging time is long.
Disclosure of Invention
The invention aims to provide a pre-charging and discharging system of a hydrogen energy automobile and a pre-charging and high-voltage discharging method thereof, which have high safety and short charging and discharging time.
The invention relates to a hydrogen energy automobile pre-charging and discharging system, which comprises a high-voltage auxiliary power supply, a fuel-electricity boosting FCDC, a motor controller, a voltage reduction DCL, a fuel-electricity air compressor controller, a high-voltage component, a first pre-charging circuit, a second pre-charging circuit, a warm air PTC and a fuel-electricity PTC, wherein the fuel-electricity boosting FCDC is connected with the high-voltage component;
the motor controller is electrically connected with a driving motor of the whole vehicle, and the electric air compressor controller is electrically connected with an air compressor motor;
the high-voltage auxiliary power supply, the first pre-charging circuit and the motor controller are connected in series to form a closed circuit, the fuel-electric boosting FCDC is connected in parallel at two ends of the high-voltage auxiliary power supply, and the voltage-reducing DCL is connected in parallel at two ends of the motor controller;
the second pre-charging circuit, the fuel electric air compressor controller and the high-voltage component are sequentially connected in series to form a branch circuit, and the branch circuit is connected to two ends of the high-voltage auxiliary power supply in parallel;
the first pre-charging circuit comprises a switch K0, a switch K1 and a first pre-charging resistor R1, wherein the switch K1 and the first pre-charging resistor R1 are connected in series on the closed circuit, and the switch K0 is connected in parallel to two ends of the switch K1 and the first pre-charging resistor R1; the second pre-charging circuit comprises a switch K2, a switch K3 and a second pre-charging resistor R2, the switch K3 and the second pre-charging resistor R2 are connected in series on the branch, and the switch K2 is connected in parallel at two ends of the switch K3 and the second pre-charging resistor R2;
the warm air PTC is connected in parallel with two ends of the high-voltage auxiliary power supply through a switch K4;
the fuel PTC is connected in parallel with two ends of the high-voltage auxiliary power supply through a switch K5;
and the output end of the high-voltage auxiliary power supply is provided with a switch K6.
According to the high-voltage power-off method of the hydrogen energy automobile pre-charging and discharging system, under the condition that the fuel electric air compressor and the high-voltage component do not have the active discharging function, the warm air PTC or the fuel electric PTC discharges, so that the fuel electric air compressor controller and the supporting capacitor of the high-voltage component complete discharging as soon as possible.
Further, a specific implementation method for discharging by the warm air PTC is as follows:
when the whole vehicle is electrified under high voltage, the switch K6, the switch K0 and the switch K1 are switched off, the motor controller starts to discharge electricity by the active discharge function, and the whole vehicle driving motor is electrified after the discharge is finished; then sequentially closing a switch K2, opening a switch K3 and closing a switch K4, connecting the fuel electric air compressor controller with a warm air PTC, and using heat generated by the operation of the warm air PTC to consume the electricity of the fuel electric air compressor controller and a supporting capacitor of a high-voltage component to finish the active discharge of the fuel electric air compressor controller and the high-voltage component;
further, the specific implementation method of discharging by the fuel PTC is as follows:
when the whole vehicle is electrified under high voltage, the switch K6, the switch K0 and the switch K1 are switched off, the motor controller starts to discharge electricity by the active discharge function, and the whole vehicle driving motor is electrified after the discharge is finished; then switch K2, disconnect switch K3, closed switch K5 are closed in proper order, fire electricity air compressor controller, fire electricity PTC and high-voltage component are connected, produce heat through the work of fire electricity PTC and use up the electricity of the support capacitance of fire electricity air compressor controller and high-voltage component, accomplish the initiative of firing electricity air compressor controller and high-voltage component and discharge.
According to the high-voltage power-off method of the hydrogen energy automobile pre-charging and discharging system, under the condition that the fuel-electric air compressor and the high-voltage component have the active discharging function, the switch K6, the switch K0 and the switch K1 are disconnected in the high-voltage power-off process, the motor controller starts the active discharging function to discharge the fuel-electric air compressor and the high-voltage component, and the power-off of the whole automobile driving motor is completed after the discharging is completed; and then the switch K2 and the switch K3 are switched off, the gas-electric air compressor controller starts the active discharging function to discharge the gas-electric air compressor controller and the high-voltage components, and the branch circuit is powered down after the discharging is finished.
The pre-charging method of the hydrogen energy automobile pre-charging and discharging system comprises the following specific processes: when the whole vehicle is electrified at a high voltage, the switch K6 is closed, then the switch K1 is closed firstly, the current is limited through the first pre-charging resistor R1, the high voltage from the high-voltage auxiliary power supply and the fuel-electric boosting FCDC firstly pre-charges the motor controller and the step-down DCL, after the pre-charging is finished, the switch K0 is closed firstly, then the switch K1 is opened, and the pre-charging of the motor controller and the step-down DCL is finished; and then closing the switch K3 to pre-charge the fuel air compressor controller and the high-voltage component, closing the switch K2 after the pre-charging is finished, and then opening the switch K3 to finish the pre-charging of the fuel air compressor controller and the high-voltage component.
The pre-charging method of the hydrogen energy automobile pre-charging and discharging system comprises the following specific processes: when the whole vehicle is electrified at high voltage, the switch K6 is closed, then the switch K3 is closed firstly, current is limited through the second pre-charging resistor R2, pre-charging is carried out on the electric air compressor controller and the high-voltage component, and after the pre-charging is finished, the switch K2 is closed firstly, then the switch K3 is opened, and the pre-charging of the electric air compressor controller and the high-voltage component is finished; and then the switch K1 is closed, the high voltage from the high-voltage auxiliary power supply and the fuel-gas boosting FCDC can pre-charge the motor controller and the step-down DCL, and after the pre-charging is finished, the switch K0 is closed and then the switch K1 is opened, so that the pre-charging of the motor controller and the step-down DCL is finished.
The pre-charging method of the hydrogen energy automobile pre-charging and discharging system comprises the following specific processes: when the whole vehicle is electrified at high voltage, the switch K6 is closed, then the switch K1 and the switch K3 are closed at the same time, the current is limited through the first pre-charging resistor R1 and the second pre-charging resistor R2 to pre-charge the electric air compressor controller and the high-voltage component, after the pre-charging is completed, the switch K2 or the switch K0 corresponding to the circuit with the completed pre-charging is closed, and then the corresponding switch K1 and the switch K3 are opened to complete the pre-charging of the electric air compressor controller, the high-voltage component, the motor controller and the step-down DCL.
The hydrogen energy automobile pre-charging and discharging system can discharge by the warm air PTC or the fuel PTC of the whole automobile under the condition that the fuel air compressor controller and other high-voltage components of the hydrogen energy automobile do not have the active discharging function, so that the fuel air compressor controller and other high-voltage component support capacitors complete discharging as soon as possible, the high-voltage discharging time of the support capacitors is shortened, and the safety of the fuel air compressor controller is improved.
According to the hydrogen energy automobile pre-charging and discharging system, the whole automobile driving motor and the fuel air compressor are separately pre-charged in the high-voltage power-on process of a hydrogen fuel cell automobile, the hydrogen fuel cell automobile can be stopped after being purged before being electrified under high voltage due to the characteristic of a fuel cell, and the whole automobile driving motor can be firstly powered under high voltage without waiting for the purging process of the fuel cell system based on the design of the double pre-charging circuit, so that the power-off safety of the whole automobile driving motor is improved, and the situation that the whole automobile driving motor still carries high voltage and has safety risk when the hydrogen fuel cell automobile is purged before being powered off can be prevented; the double-pre-charging circuit of the hydrogen fuel cell automobile can prevent the motor from still carrying high voltage when the automobile is stopped and charged, and reduces the existing safety risk.
Drawings
FIG. 1 is a schematic diagram of a pre-charging and discharging system of a hydrogen energy vehicle according to the present invention.
1. A high voltage auxiliary power supply; 2. fuel-electric boost FCDC; 3. a motor controller; 4. reducing the pressure of DCL; 5. a fuel electric air compressor controller; 6. a high voltage component; 7. a first pre-charge circuit; 8. a second precharge circuit; 9. warm air PTC; 10. a fuel PTC; 11. a whole vehicle driving motor; 12. an air compressor motor.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, the hydrogen energy automobile pre-charging and discharging system of the present invention comprises a high voltage auxiliary power supply 1, a fuel-electric boost FCDC2, a motor controller 3, a buck DCL4, a fuel-electric air compressor controller 5, a high voltage component 6, a first pre-charging circuit 7, a second pre-charging circuit 8, a warm air PTC9 and a fuel-electric PTC 10;
the motor controller 3 is electrically connected with a whole vehicle driving motor 11, and the fuel electric air compressor controller 5 is electrically connected with an air compressor motor 12;
the high-voltage auxiliary power supply 1, the first pre-charging circuit 7 and the motor controller 3 are connected in series to form a closed circuit, the fuel-electric boosting FCDC2 is connected in parallel at two ends of the high-voltage auxiliary power supply 1, and the voltage-reducing DCL4 is connected in parallel at two ends of the motor controller 3;
the second pre-charging circuit 8, the gas-electric air compressor controller 5 and the high-voltage component 6 are sequentially connected in series to form a branch circuit, and the branch circuit is connected in parallel at two ends of the high-voltage auxiliary power supply 1;
the warm air PTC9 is connected in parallel with the two ends of the high-voltage auxiliary power supply 1 through a switch K4;
the fuel PTC10 is connected in parallel with the two ends of the high-voltage auxiliary power supply 1 through a switch K5;
the output end of the high-voltage auxiliary power supply 1 is provided with a switch K6.
Further, the first pre-charging circuit 7 includes a switch K0, a switch K1 and a first pre-charging resistor R1, the switch K1 and the first pre-charging resistor R1 are connected in series on the closed circuit, and the switch K0 is connected in parallel across the switch K1 and the first pre-charging resistor R1; the second pre-charging circuit 8 comprises a switch K2, a switch K3 and a second pre-charging resistor R2, the switch K3 and the second pre-charging resistor R2 are connected in series on the branch circuit, and the switch K2 is connected in parallel to two ends of the switch K3 and the second pre-charging resistor R2.
According to the high-voltage power-off method of the hydrogen energy automobile pre-charging and discharging system, under the condition that the fuel air compressor and the high-voltage component 6 do not have the active discharging function, the warm air PTC9 or the fuel PTC10 discharges electricity, so that the support capacitors of the fuel air compressor controller 5 and the high-voltage component 6 finish discharging as soon as possible.
Switch K0 may include a first high voltage positive main positive relay or contactor.
Switch K1 may include a first high voltage pre-charge relay or contactor.
Switch K2 may include a second high voltage positive main positive relay or contactor.
Switch K3 may include a second high voltage pre-charge relay or contactor.
The switch K4 is used for controlling the high-voltage input of the warm air PTC to be switched on or off.
The switch K5 is used to control the switching on and off of the high voltage input to the fuel PTC.
The voltage reduction DCL4 is used as a converter for converting the direct current high voltage of the whole vehicle into direct current low voltage;
the motor controller 3 has the functions of; controlling the rotating speed and torque of the driving motor 11 of the whole vehicle;
the whole vehicle driving motor 11 is used for driving the vehicle to run;
the air compressor motor 12 is used for pressurizing the air path pressure of the fuel cell and inputting the pressure to the fuel cell stack;
the fuel electric air compressor controller 5 is used for controlling the rotating speed, starting and stopping and the like of the air compressor motor 12;
the fuel cell boosting FCDC19 has the function of boosting the output voltage of the fuel cell and providing the boosted output voltage for the whole vehicle, and a directional diode is arranged in the fuel cell boosting FCDC19, so that pre-charging is not needed at the output end of the fuel cell boosting FCDC 19;
the high-voltage component 6 refers to a high-voltage component 6 or an accessory with a supporting capacitor or other capacitors inside;
the warm air PTC has the function of providing warm air for users by heating air to generate heat;
the fuel PTC has the function of heating circulating water of an air compressor, a boosting FCDC and the like of the fuel cell system, so that the heating function of cooling water is realized.
The specific implementation method for discharging by the warm air PTC9 is as follows:
when the whole vehicle is electrified under high voltage, the switch K6, the switch K0 and the switch K1 are switched off, the motor controller 3 starts to discharge electricity by the active discharge function, and the whole vehicle driving motor 11 is electrified after the discharge is finished; then a switch K2, a switch K3 and a switch K4 are sequentially closed, the fuel electric air compressor controller 5 is connected with the warm air PTC9, heat is generated through the work of the warm air PTC9, electricity of the fuel electric air compressor controller 5 and the supporting capacitor of the high-voltage component 6 is used, and active discharging of the fuel electric air compressor controller 5 and the high-voltage component 6 is completed;
the specific implementation of the discharge by the fuel PTC10 is as follows:
when the whole vehicle is electrified under high voltage, the switch K6, the switch K0 and the switch K1 are switched off, the motor controller 3 starts to discharge electricity by the active discharge function, and the whole vehicle driving motor 11 is electrified after the discharge is finished; then, a switch K2, a switch K3 and a switch K5 are sequentially closed, the fuel-electric air compressor controller 5, the fuel-electric PTC10 and the high-voltage part 6 are connected, heat is generated through the work of the fuel-electric PTC10, electricity of supporting capacitors of the fuel-electric air compressor controller 5 and the high-voltage part 6 is used, and active discharging of the fuel-electric air compressor controller 5 and the high-voltage part 6 is completed.
According to the hydrogen energy automobile pre-charging and discharging system, under the condition that the fuel electric air compressor controller 5 and other high-voltage components 6 of the hydrogen energy automobile do not have the active discharging function, discharging can be carried out through the warm air PTC9 or the fuel electric PTC10 of the whole automobile, so that the fuel electric air compressor controller 5 and other high-voltage components 6 support capacitors to complete discharging as soon as possible, the high-voltage discharging time of the support capacitors is shortened, and the safety of the fuel electric air compressor controller 5 is improved.
According to the high-voltage power-off method of the hydrogen energy automobile pre-charging and discharging system, under the condition that the fuel air compressor and the high-voltage component 6 have the active discharging function, the switch K6, the switch K0 and the switch K1 are disconnected in the high-voltage power-off process, the motor controller 3 starts the active discharging function to discharge the fuel air compressor and the high-voltage component, and the power-off of the whole automobile driving motor 11 is completed after the discharging is completed; and then the switch K2 and the switch K3 are disconnected, the gas-electric air compressor controller 5 starts to discharge electricity with the high-voltage component 6, and branch power-down is completed after the electricity discharge is completed.
The pre-charging method of the hydrogen energy automobile pre-charging and discharging system comprises the following specific processes: when the whole vehicle is electrified at high voltage, the switch K6 is closed, then the switch K1 is closed firstly, current is limited through the first pre-charging resistor R1, the high voltage from the high-voltage auxiliary power supply 1 and the fuel-electric boosting FCDC2 firstly pre-charges the motor controller 3 and the voltage reduction DCL4, after pre-charging is completed, the switch K0 is closed firstly, then the switch K1 is opened, and pre-charging of the motor controller 3 and the voltage reduction DCL4 is completed; and then closing the switch K3 to pre-charge the fuel air compressor controller 5 and the high-voltage component 6, closing the switch K2 after the pre-charging is finished, and then opening the switch K3 to finish the pre-charging of the fuel air compressor controller 5 and the high-voltage component 6.
The pre-charging method of the hydrogen energy automobile pre-charging and discharging system comprises the following specific processes: when the whole vehicle is electrified at high voltage, the switch K6 is closed, then the switch K3 is closed firstly, current is limited through the second pre-charging resistor R2, the pre-charging of the fuel electric air compressor controller 5 and the high-voltage part 6 is started, and after the pre-charging is finished, the switch K2 is closed firstly, then the switch K3 is opened, and the pre-charging of the fuel electric air compressor controller 5 and the high-voltage part 6 is finished; then, the switch K1 is closed, the high voltage from the high-voltage auxiliary power supply 1 and the fuel-fired boost FCDC2 can pre-charge the motor controller 3 and the buck DCL4, and after the pre-charging is completed, the switch K0 is closed and then the switch K1 is opened, so that the pre-charging of the motor controller 3 and the buck DCL4 is completed.
The pre-charging method of the hydrogen energy automobile pre-charging and discharging system comprises the following specific processes: when the whole vehicle is electrified at high voltage, the switch K6 is closed, then the switch K1 and the switch K3 are closed at the same time, the current is limited through the first pre-charging resistor R1 and the second pre-charging resistor R2 to pre-charge the electric air compressor controller 5 and the high-voltage component 6, after the pre-charging is completed, the switch K2 or the switch K0 corresponding to the circuit with the completed pre-charging is closed, and then the corresponding switch K1 and the switch K3 are disconnected to complete the pre-charging of the electric air compressor controller 5, the high-voltage component 6, the motor controller 3 and the voltage reduction DCL 4.
According to the hydrogen energy automobile pre-charging and discharging system, the whole automobile driving motor 11 and the fuel air compressor are separately pre-charged in the high-voltage power-on process of a hydrogen fuel cell automobile, the hydrogen fuel cell automobile can be stopped after being purged before being electrified under high voltage due to the characteristic of a fuel cell, and the whole automobile driving motor 11 can be firstly powered under high voltage without waiting for the purging process of the fuel cell system based on the design of a double pre-charging circuit, so that the power-off safety of the whole automobile driving motor 11 is improved, and the situation that the whole automobile driving motor 11 still carries high voltage and has safety risk when the hydrogen fuel cell automobile is purged before being powered off can be prevented; the double-pre-charging circuit of the hydrogen fuel cell automobile can prevent the situation that a motor still has high voltage and has safety risk when the automobile is stopped and charged.
The above is not relevant and is applicable to the prior art.
While certain specific embodiments of the present invention have been described in detail by way of illustration, it will be understood by those skilled in the art that the foregoing is illustrative only and is not limiting of the scope of the invention, as various modifications or additions may be made to the specific embodiments described and substituted in a similar manner by those skilled in the art without departing from the scope of the invention as defined in the appending claims. It should be understood by those skilled in the art that any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention are included in the scope of the present invention.

Claims (8)

1. A pre-charging and discharging system of a hydrogen energy automobile is characterized in that: the device comprises a high-voltage auxiliary power supply (1), a fuel-electric boosting FCDC (2), a motor controller (3), a voltage reduction DCL (4), a fuel-electric air compressor controller (5), a high-voltage component (6), a first pre-charging circuit (7), a second pre-charging circuit (8), a warm air PTC (9) and a fuel-electric PTC (10);
the motor controller (3) is electrically connected with a driving motor (11) of the whole vehicle, and the fuel electric air compressor controller (5) is electrically connected with an air compressor motor (12);
the high-voltage auxiliary power supply (1), the first pre-charging circuit (7) and the motor controller (3) are connected in series to form a closed circuit, the fuel-electric boosting FCDC (2) is connected to two ends of the high-voltage auxiliary power supply (1) in parallel, and the voltage-reducing DCL (4) is connected to two ends of the motor controller (3) in parallel;
the second pre-charging circuit (8), the fuel electric air compressor controller (5) and the high-voltage component (6) are sequentially connected in series to form a branch circuit, and the branch circuit is connected to two ends of the high-voltage auxiliary power supply (1) in parallel;
the first pre-charging circuit (7) comprises a switch K0, a switch K1 and a first pre-charging resistor R1, wherein the switch K1 and the first pre-charging resistor R1 are connected in series on the closed circuit, and the switch K0 is connected in parallel to two ends of the switch K1 and the first pre-charging resistor R1; the second pre-charging circuit (8) comprises a switch K2, a switch K3 and a second pre-charging resistor R2, the switch K3 and the second pre-charging resistor R2 are connected in series on the branch, and the switch K2 is connected in parallel to two ends of the switch K3 and the second pre-charging resistor R2;
the warm air PTC (9) is connected in parallel with two ends of the high-voltage auxiliary power supply (1) through a switch K4;
the fuel PTC (10) is connected in parallel with two ends of the high-voltage auxiliary power supply (1) through a switch K5;
and the output end of the high-voltage auxiliary power supply (1) is provided with a switch K6.
2. The high-voltage power-off method of the pre-charging and discharging system of the hydrogen energy vehicle as claimed in claim 1, wherein: under the condition that the fuel electric air compressor controller (5) and the high-voltage component (6) do not have an active discharging function, the warm air PTC (9) or the fuel electric PTC (10) discharges electricity, so that the support capacitors of the fuel electric air compressor controller (5) and the high-voltage component (6) finish discharging as soon as possible.
3. The high-voltage power-off method of the pre-charging and discharging system of the hydrogen energy vehicle as claimed in claim 2, wherein: the specific implementation method of discharging by the warm air PTC (9) is as follows:
when the whole vehicle is electrified under high voltage, the switch K6, the switch K0 and the switch K1 are switched off, the motor controller (3) starts to discharge electricity by the active discharge function, and the whole vehicle driving motor (11) is electrified after the discharge is finished; then switch K2 is closed, switch K3 is opened, switch K4 is closed in proper order, electricity-burning air compressor controller (5) and warm air PTC (9) are connected, through warm air PTC (9) work production heat will electricity of electricity-burning air compressor controller (5) and high-voltage component's (6) support electric capacity is used up, accomplishes the initiative of electricity-burning air compressor controller (5) and high-voltage component (6) is discharged.
4. The high-voltage power-off method of the pre-charging and discharging system of the hydrogen energy vehicle as claimed in claim 2, wherein: the specific implementation method of discharging by the fuel PTC (10) is as follows:
when the whole vehicle is electrified under high voltage, the switch K6, the switch K0 and the switch K1 are switched off, the motor controller (3) starts to discharge electricity by the active discharge function, and the whole vehicle driving motor (11) is electrified after the discharge is finished; and then the switch K2 is closed, the switch K3 is opened, the switch K5 is closed, the fuel electric air compressor controller (5), the fuel electric PTC (10) and the high-voltage component (6) are connected, and the fuel electric air compressor controller (5) and the high-voltage component (6) are powered off by using heat generated by the work of the fuel electric PTC (10) to finish the active discharge of the fuel electric air compressor controller (5) and the high-voltage component (6).
5. The high-voltage power-off method of the pre-charging and discharging system of the hydrogen energy vehicle as claimed in claim 3 or 4, wherein: under the condition that the fuel electric air compressor and the high-voltage component (6) have the active discharge function, the switch K6, the switch K0 and the switch K1 are disconnected in the high-voltage electricity process, the motor controller (3) starts the active discharge function to discharge electricity, and the whole vehicle driving motor (11) is powered off after the discharge is finished; and then the switch K2 and the switch K3 are disconnected, the gas-electric air compressor controller (5) is used for starting the active discharging function to discharge the gas-electric air compressor controller and the high-voltage component (6), and branch power-down is completed after discharging is completed.
6. The pre-charging method for the pre-charging and discharging system of the hydrogen energy vehicle as claimed in claim 1, wherein: the specific process is as follows: when the whole vehicle is electrified at high voltage, the switch K6 is closed, then the switch K1 is closed firstly, current is limited through the first pre-charging resistor R1, the high voltage from the high-voltage auxiliary power supply (1) and the fuel-electric boosting FCDC (2) is pre-charged for the motor controller (3) and the voltage-reducing DCL (4), after pre-charging is completed, the switch K0 is closed firstly, then the switch K1 is opened, and pre-charging of the motor controller (3) and the voltage-reducing DCL (4) is completed; and then closing the switch K3 to pre-charge the fuel air compressor controller (5) and the high-voltage component (6), closing the switch K2 after the pre-charging is finished, and then opening the switch K3 to finish the pre-charging of the fuel air compressor controller (5) and the high-voltage component (6).
7. The pre-charging method for the pre-charging and discharging system of the hydrogen energy vehicle as claimed in claim 1, wherein: the specific process is as follows: when the whole vehicle is electrified at high voltage, the switch K6 is closed, then the switch K3 is closed firstly, current is limited through the second pre-charging resistor R2, pre-charging is carried out on the fuel air compressor controller (5) and the high-voltage component (6), after the pre-charging is finished, the switch K2 is closed firstly, then the switch K3 is opened, and the pre-charging of the fuel air compressor controller (5) and the high-voltage component (6) is finished; and then the switch K1 is closed, the motor controller (3) and the step-down DCL (4) are pre-charged by the high voltage from the high-voltage auxiliary power supply (1) and the fuel-electric boosting FCDC (2), and the switch K1 is opened after the switch K0 is closed after the pre-charging is finished, so that the pre-charging of the motor controller (3) and the step-down DCL (4) is finished.
8. The pre-charging method for the pre-charging and discharging system of the hydrogen energy vehicle as claimed in claim 1, wherein: the specific process is as follows: when the whole vehicle is electrified at high voltage, the switch K6 is closed, then the switch K1 and the switch K3 are closed at the same time, the current is limited through the first pre-charging resistor R1 and the second pre-charging resistor R2 to pre-charge the fuel air compressor controller (5) and the high-voltage component (6), after the pre-charging is completed, the switch K2 or the switch K0 corresponding to a circuit with the completed pre-charging is closed, and then the corresponding switch K1 and the switch K3 are opened to complete the pre-charging of the fuel air compressor controller (5) and the high-voltage component (6), the motor controller (3) and the voltage reduction DCL (4).
CN202110298169.XA 2021-03-19 2021-03-19 Pre-charging and discharging system of hydrogen energy automobile and pre-charging and high-voltage discharging method thereof Pending CN112977069A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113479066A (en) * 2021-08-17 2021-10-08 金华氢途科技有限公司 High-integration-level multifunctional high-voltage distribution box for forklift
CN113829965A (en) * 2021-10-31 2021-12-24 东风商用车有限公司 Purging delay power-off control method for fuel cell system of heavy truck in hydrogen fuel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113479066A (en) * 2021-08-17 2021-10-08 金华氢途科技有限公司 High-integration-level multifunctional high-voltage distribution box for forklift
CN113829965A (en) * 2021-10-31 2021-12-24 东风商用车有限公司 Purging delay power-off control method for fuel cell system of heavy truck in hydrogen fuel

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