CN112977069B - Hydrogen energy vehicle pre-charging and discharging system and pre-charging and high-voltage discharging method thereof - Google Patents
Hydrogen energy vehicle pre-charging and discharging system and pre-charging and high-voltage discharging method thereof Download PDFInfo
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- CN112977069B CN112977069B CN202110298169.XA CN202110298169A CN112977069B CN 112977069 B CN112977069 B CN 112977069B CN 202110298169 A CN202110298169 A CN 202110298169A CN 112977069 B CN112977069 B CN 112977069B
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- 238000007599 discharging Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 43
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000001257 hydrogen Substances 0.000 title claims abstract description 39
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 39
- 239000000446 fuel Substances 0.000 claims abstract description 91
- 239000003990 capacitor Substances 0.000 claims abstract description 15
- 230000005611 electricity Effects 0.000 claims description 22
- 239000002737 fuel gas Substances 0.000 claims description 5
- 238000010926 purge Methods 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract 1
- 101150065381 DCL4 gene Proteins 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
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- 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
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- 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
本发明公开了一种氢能源汽车预充电和放电系统及其充电、下高压的方法。本发明的高压辅助电源、第一预充电路和电机控制器串联形成闭合电路，燃电升压FCDC并联在高压辅助电源的两端，降压DCL并联在电机控制器的两端；第二预充电路、燃电空压机控制器和高压部件依次串联形成支路，支路并联在高压辅助电源的两端；暖风PTC并联在高压辅助电源的两端；燃电PTC并联在高压辅助电源的两端。本发明在燃电空压机控制器和高压部件不具备主动放电功能的情况下，由整车的暖风PTC或燃电PTC进行来放电，缩短支撑电容高压放电时间，让整车驱动电机先进行高压下电而不用等待燃料电池系统的吹扫这个过程，而且分开进行预充电。
The present invention discloses a pre-charging and discharging system for hydrogen energy vehicles and a method for charging and reducing high voltage. The high-voltage auxiliary power supply, the first pre-charging circuit and the motor controller of the present invention are connected in series to form a closed circuit, the fuel-electric boost FCDC is connected in parallel at both ends of the high-voltage auxiliary power supply, and the voltage reduction DCL is connected in parallel at both ends of the motor controller; the second pre-charging circuit, the fuel-electric air compressor controller and the high-voltage components are connected in series in sequence to form a branch circuit, and the branch circuit is connected in parallel at both ends of the high-voltage auxiliary power supply; the warm air PTC is connected in parallel at both ends of the high-voltage auxiliary power supply; the fuel-electric PTC is connected in parallel at both ends of the high-voltage auxiliary power supply. In the present invention, when the fuel-electric air compressor controller and the high-voltage components do not have an active discharge function, the warm air PTC or the fuel-electric PTC of the whole vehicle is used for discharge, shortening the high-voltage discharge time of the supporting capacitor, allowing the whole vehicle drive motor to first perform high-voltage power reduction without waiting for the purge process of the fuel cell system, and pre-charging is performed separately.
Description
Technical Field
The invention relates to the technical field of hydrogen energy automobiles, in particular to a hydrogen energy automobile pre-charging and discharging system and a pre-charging and high-voltage power-down method thereof.
Background
The fuel cell passenger car in China has completed commercial demonstration operation, the fuel cell passenger car is also developing rapidly, various performance indexes have basically reached the operation requirement, and the large-scale industrialization is started. However, for a new energy system to be popularized and applied, the safety of the new energy system should be paid attention first. The whole car driving motor and the fuel air compressor in the prior art are simultaneously pre-charged, so that certain safety risks exist in the charging and discharging processes, and the discharging time is long.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a hydrogen energy automobile pre-charging and discharging system with high safety and short charging and discharging time and a pre-charging and high-voltage power-down method thereof.
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 step-down 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;
The motor controller is electrically connected with the whole vehicle driving motor, and the fuel electric air compressor controller is electrically connected with the 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 electricity boosting unit FCDC is connected in parallel to two ends of the high-voltage auxiliary power supply, and the step-down DCL is connected in parallel to 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 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, the switch K0 is connected in parallel at 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;
The output end of the high-voltage auxiliary power supply is provided with a switch K6.
According to the high-voltage power-down method of the hydrogen energy automobile pre-charging and discharging system, under the condition that the fuel-air compressor and the high-voltage component do not have an active discharging function, the warm air PTC or the fuel-air PTC discharges, so that the supporting capacitors of the fuel-air compressor controller and the high-voltage component finish discharging as soon as possible.
Further, the specific implementation method of 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 disconnected, and the motor controller starts to discharge the electric motor by the function of active discharge, and the electrification of the whole vehicle driving motor is completed after the discharge is completed; then sequentially closing the switch K2, opening the switch K3 and closing the switch K4, wherein the fuel-electricity air compressor controller is connected with a warm air PTC, and the power of the supporting capacitors of the fuel-electricity air compressor controller and the high-voltage component is consumed by heat generated by the operation of the warm air PTC, so that the active discharge of the fuel-electricity air compressor controller and the high-voltage component is completed;
further, the specific implementation method for discharging by the fuel cell PTC comprises the following steps:
When the whole vehicle is electrified under high voltage, the switch K6, the switch K0 and the switch K1 are disconnected, the motor controller starts to discharge the electric motor, the whole vehicle driving motor is powered down after the electric motor is discharged, then the switch K2, the switch K3 and the switch K5 are sequentially closed, the fuel electric air compressor controller, the fuel electric PTC and the high-voltage component are connected, heat is generated by the operation of the fuel electric PTC to consume the electricity of the supporting capacitors of the fuel electric air compressor controller and the high-voltage component, and the active electric discharge of the fuel electric air compressor controller and the high-voltage component is completed.
According to the high-voltage power-down method of the hydrogen energy automobile pre-charging and discharging system, under the condition that the fuel-air compressor and the high-voltage component have the active discharging function, in the high-voltage power-down process, the switch K6, the switch K0 and the switch K1 are disconnected, the motor controller starts to discharge the active discharging function, the whole automobile driving motor is powered down after the discharging is completed, then the switch K2 and the switch K3 are disconnected, the fuel-air compressor controller starts to discharge the active discharging function and the high-voltage component, and the branch power-down is completed after the discharging is completed.
The precharge method of the hydrogen energy automobile precharge and discharge system comprises the specific processes that when the whole automobile is electrified at high voltage, the switch K6 is closed, then the switch K1 is closed, the current is limited through the first precharge resistor R1, the high voltage from the high-voltage auxiliary power supply and the fuel voltage boost FCDC is used for precharging the motor controller and the buck DCL, after the precharge is finished, the switch K0 is closed, then the switch K1 is opened, the precharge of the motor controller and the buck DCL is finished, the switch K3 is closed, the precharge is carried out on the fuel air compressor controller and the high-voltage component, and after the precharge is finished, the switch K2 is closed, then the switch K3 is opened, and the precharge of the fuel air compressor controller and the high-voltage component is finished.
The precharge method of the hydrogen energy automobile precharge and discharge system comprises the specific processes that when the whole automobile is electrified at high voltage, the switch K6 is closed, then the switch K3 is closed, the precharge is started to be performed on the fuel electric air compressor controller and the high-voltage component through the second precharge resistor R2, after the precharge is completed, the switch K2 is closed, then the switch K3 is opened, the precharge is completed on the fuel electric air compressor controller and the high-voltage component, then the switch K1 is closed, the high voltage from the high-voltage auxiliary power supply and the fuel electric booster FCDC can precharge the motor controller and the buck DCL, and after the precharge is completed, the switch K0 is closed, the switch K1 is opened, and the precharge on the motor controller and the buck DCL is completed.
The precharge method of the precharge and discharge system of the hydrogen energy automobile comprises the specific processes that when the whole automobile 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 precharge is carried out on the controller of the fuel-air compressor and the high-voltage component by limiting the current through the first precharge resistor R1 and the second precharge resistor R2, after the precharge is finished, the switch K2 or the switch K0 corresponding to the corresponding precharge finished loop is closed, and then the corresponding switch K1 and the corresponding switch K3 are opened, so that the precharge of the controller of the fuel-air compressor, the high-voltage component, the motor controller and the step-down DCL is finished.
According to the hydrogen energy automobile pre-charging and discharging system, under the condition that the fuel electric air compressor controller and other high-voltage components of the hydrogen energy automobile do not have an active discharging function, the fuel electric air compressor controller and other high-voltage components can be discharged by the warm air PTC or the fuel electric PTC of the whole automobile, so that the supporting capacitor of the fuel electric air compressor controller and other high-voltage components can complete discharging as soon as possible, the high-voltage discharging time of the supporting capacitor is shortened, and the safety of the fuel electric air compressor controller is improved.
The invention relates to a hydrogen energy automobile pre-charging and discharging system, which is characterized in that a whole automobile driving motor and a fuel air compressor are separately pre-charged in the high-voltage power-up process of a hydrogen fuel battery automobile, and the hydrogen fuel battery automobile can be stopped after being purged before the high-voltage power-up process due to the characteristics of a fuel battery, and the whole automobile driving motor can be powered down at high voltage without waiting for the purging process of a fuel battery system based on the design of a double pre-charging circuit, so that the safety of powering down the whole automobile driving motor is improved, the situation that the whole automobile driving motor still has high voltage and has safety risks when the hydrogen fuel battery automobile is purged before powering down can be prevented.
Drawings
Fig. 1 is a schematic structural diagram of a hydrogen energy automobile pre-charge and discharge system according to the present invention.
1. The high-voltage auxiliary power supply comprises a high-voltage auxiliary power supply, a fuel electricity boosting power supply FCDC, a motor controller FCDC, a step-down DCL, a fuel electricity air compressor controller 6, a high-voltage component 7, a first pre-charging circuit 8, a second pre-charging circuit 9, a warm air PTC, a fuel electricity PTC 10, a whole vehicle driving motor 11, a fuel electricity air compressor motor 12.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying 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 comprises a high-voltage auxiliary power supply 1, a fuel electricity boosting FCDC, a motor controller 3, a step-down DCL4, a fuel electricity 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 electricity PTC10;
The motor controller 3 is electrically connected with the whole vehicle driving motor 11, and the fuel electric air compressor controller 5 is electrically connected with the 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 electricity boosting FCDC is connected in parallel to two ends of the high-voltage auxiliary power supply 1, and the voltage reducing DCL4 is connected in parallel to two ends of the motor controller 3;
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, and the branch is connected in parallel to 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 comprises 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, the switch K0 is connected in parallel at 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 at two ends of the switch K3 and the second pre-charging resistor R2.
In the high-voltage power-down 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 an active discharging function, the warm air PTC9 or the fuel-air PTC10 discharges, so that the supporting capacitors of the fuel-air compressor controller 5 and the high-voltage component 6 finish discharging as soon as possible.
The switch K0 may include a first high voltage positive main positive relay or contactor.
The switch K1 may include a first high voltage pre-charge relay or contactor.
The switch K2 may include a second high voltage positive main positive relay or contactor.
The switch K3 may include a second high voltage pre-charge relay or contactor.
The switch K4 is used for controlling the on/off of the high-voltage input of the warm air PTC.
The switch K5 is used for controlling the high-voltage input of the fuel-cell PTC to be turned on or off.
The buck DCL4 is used for converting the direct current high voltage of the whole vehicle into the direct current low voltage;
the motor controller 3 has the functions of controlling the rotation speed, torque and the like of the whole vehicle driving motor 11;
the whole vehicle driving motor 11 is used for driving a vehicle to run;
the air compressor motor 12 is used for boosting the air path pressure of the fuel cell and inputting the air path pressure to the fuel cell stack;
The fuel-electric air compressor controller 5 is used for controlling the rotating speed, start-stop and the like of the air compressor motor 12;
the fuel electricity boosting FCDC is used for boosting the output voltage of the fuel cell and providing the boosted voltage to the whole vehicle, and the directional diode is arranged in the fuel electricity boosting FCDC, so that the output end of the fuel electricity boosting FCDC does not need to be pre-charged;
the high-voltage component 6 is 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 a user by heating air to generate heat;
The fuel PTC is used for heating circulating water such as an air compressor, a boost FCDC and the like of the fuel cell system, so as to realize the heating function of cooling water.
The specific implementation method of 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 disconnected, the motor controller 3 starts to discharge the electric motor by the function of active discharging, and the whole vehicle driving motor 11 is electrified after the discharging is completed; then sequentially closing the switch K2, opening the switch K3 and closing the switch K4, connecting the fuel-electric air compressor controller 5 with the warm air PTC9, and using the power of the supporting capacitors of the fuel-electric air compressor controller 5 and the high-voltage component 6 by heat generated by the operation of the warm air PTC9 to finish the active discharge of the fuel-electric air compressor controller 5 and the high-voltage component 6;
the specific implementation of the discharge by the fuel cell PTC10 is as follows:
when the whole vehicle is electrified under high voltage, the switch K6, the switch K0 and the switch K1 are disconnected, the motor controller 3 starts to discharge the electric power, the whole vehicle driving motor 11 is powered down after the electric power is discharged, then the switch K2, the switch K3 and the switch K5 are sequentially closed, the fuel electric air compressor controller 5, the fuel electric PTC10 and the high-voltage component 6 are connected, heat is generated by the operation of the fuel electric PTC10 to consume the electricity of the supporting capacitors of the fuel electric air compressor controller 5 and the high-voltage component 6, and the active electric power discharge of the fuel electric air compressor controller 5 and the high-voltage component 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 an active discharging function, the fuel electric air compressor controller 5 and other high-voltage components 6 can discharge by the warm air PTC9 or the fuel electric PTC10 of the whole automobile, so that the supporting capacitor of the fuel electric air compressor controller 5 and other high-voltage components 6 can finish discharging as soon as possible, the high-voltage discharging time of the supporting capacitor is shortened, and the safety of the fuel electric air compressor controller 5 is improved.
In the high-voltage power-down 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, in the high-voltage power-down process, the switch K6, the switch K0 and the switch K1 are disconnected, the motor controller 3 starts to discharge the active discharging function, the whole automobile driving motor 11 is powered down after the discharging is completed, then the switch K2 and the switch K3 are disconnected, the fuel-air compressor controller 5 starts to discharge the active discharging function and the high-voltage component 6, and the branch power-down is completed after the discharging is completed.
The precharge method of the hydrogen energy automobile precharge and discharge system comprises the specific processes that when the whole automobile is electrified at high voltage, a switch K6 is closed, then a switch K1 is closed, the high voltage from a high-voltage auxiliary power supply 1 and a fuel voltage booster FCDC is used for precharging a motor controller 3 and a voltage reducing DCL4 firstly through a first precharge resistor R1, the switch K0 is closed firstly after the precharge is completed, the switch K1 is opened after the precharge is completed, the precharge of the motor controller 3 and the voltage reducing DCL4 is completed, the switch K3 is closed again to precharge a fuel air compressor controller 5 and a high-voltage component 6, and the switch K3 is closed firstly after the precharge is completed, so that the precharge of the fuel air compressor controller 5 and the high-voltage component 6 is completed.
The precharge method of the hydrogen energy automobile precharge and discharge system comprises the specific processes that when the whole automobile is electrified at high voltage, a switch K6 is closed, then a switch K3 is closed, current limiting is carried out through a second precharge resistor R2, precharge is carried out on a fuel gas compressor controller 5 and a high-voltage component 6, after precharge is finished, the switch K2 is closed, then the switch K3 is opened, precharge of the fuel gas compressor controller 5 and the high-voltage component 6 is finished, the switch K1 is closed again, high voltage from a high-voltage auxiliary power supply 1 and a fuel gas booster FCDC can precharge the motor controller 3 and a buck DCL4 first, after precharge is finished, the switch K0 is closed, and precharge of the motor controller 3 and the buck DCL4 is finished.
The precharge method of the precharge and discharge system of the hydrogen energy automobile comprises the specific processes that when the whole automobile is electrified at high voltage, a switch K6 is closed, then the switch K1 and the switch K3 are closed at the same time, the precharge is performed on the fuel-air compressor controller 5 and the high-voltage component 6 by limiting current through a first precharge resistor R1 and a second precharge resistor R2, after the precharge is completed, the corresponding switch K2 or the switch K0 corresponding to a corresponding precharge completed loop is closed, and then the corresponding switch K1 and the corresponding switch K3 are opened to complete the precharge of the fuel-air compressor controller 5 and the high-voltage component 6, the motor controller 3 and the step-down DCL 4.
The invention relates to a hydrogen energy automobile pre-charging and discharging system, which is characterized in that a whole automobile driving motor 11 and a fuel air compressor are separately pre-charged in the high-voltage power-up process of a hydrogen fuel battery automobile, and the hydrogen fuel battery automobile can be stopped after being purged before the high-voltage power-up due to the characteristics of a fuel battery in the high-voltage power-up process, and the whole automobile driving motor 11 can be powered down at high voltage without waiting for the purging process of a fuel battery system based on the design of a double pre-charging circuit, so that the power-down safety of the whole automobile driving motor 11 is improved, the situation that the whole automobile driving motor 11 still has high voltage and has safety risk can be prevented when the hydrogen fuel battery automobile is purged before the power-down, and the situation that the motor still has high voltage and has safety risk can be prevented 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 example, it will be appreciated by those skilled in the art that the foregoing examples are provided for the purpose of illustration only and are not intended to limit the scope of the invention, and that various modifications or additions and substitutions to the described specific embodiments may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the invention as defined in the accompanying claims. It should be understood by those skilled in the art that any modification, equivalent substitution, improvement, etc. made to the above embodiments according to the technical substance of the present invention should be included in the scope of protection of the present invention.
Claims (8)
1. The hydrogen energy automobile pre-charging and discharging system is characterized by comprising a high-voltage auxiliary power supply (1), a fuel electricity boosting unit FCDC (2), a motor controller 3, a step-down DCL (4), a fuel electricity 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 electricity PTC (10);
The motor controller (3) is electrically connected with the whole vehicle driving motor (11), and the fuel electric air compressor controller (5) is electrically connected with the 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 electricity boosting FCDC (2) is connected in parallel to two ends of the high-voltage auxiliary power supply (1), and the voltage reducing DCL (4) is connected in parallel to two ends of the motor controller (3);
The second pre-charging circuit (8), the fuel-electricity air compressor controller (5) and the high-voltage component (6) are sequentially connected in series to form a branch, and the branch is connected in parallel to two ends of the high-voltage auxiliary power supply (1);
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, the switch K0 is connected in parallel with 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 with two ends of the switch K3 and the second pre-charging resistor R2;
the warm air PTC (9) is connected in parallel with the two ends of the high-voltage auxiliary power supply (1) through a switch K4;
the fuel-electricity PTC (10) 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.
2. The method for high-voltage power down of a hydrogen energy automobile pre-charging and discharging system according to claim 1, wherein the warm air PTC (9) or the fuel electric PTC (10) discharges under the condition that the fuel electric air compressor controller (5) and the high-voltage component (6) do not have an active discharging function, so that the supporting capacitance of the fuel electric air compressor controller (5) and the high-voltage component (6) can finish discharging as soon as possible.
3. A high-voltage power-down method of a hydrogen energy automobile pre-charge and discharge system as set forth in claim 2, characterized in that the specific implementation method of discharging by the warm air PTC (9) is as follows:
when the whole vehicle is powered down under high voltage, the switch K6, the switch K0 and the switch K1 are disconnected, the motor controller (3) starts to discharge the power, the whole vehicle driving motor (11) is powered down after the power discharge is completed, then the switch K2 is sequentially closed, the switch K3 is disconnected, the switch K4 is closed, the fuel-air compressor controller (5) is connected with the warm air PTC (9), and the power of the supporting capacitors of the fuel-air compressor controller (5) and the high-voltage component (6) is consumed by heat generated by the working of the warm air PTC (9), so that the power of the fuel-air compressor controller (5) and the high-voltage component (6) is actively discharged.
4. A high-voltage power-down method of a hydrogen energy automobile pre-charge and discharge system as set forth in claim 2, wherein the discharging by said fuel PTC (10) is realized by the following steps:
When the whole vehicle is electrified under high voltage, the switch K6, the switch K0 and the switch K1 are disconnected, the motor controller (3) starts to discharge the electric power, the whole vehicle driving motor (11) is powered down after the electric power is discharged, then the switch K2 is closed, the switch K3 is disconnected, 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, heat is generated by the operation of the fuel electric PTC (10) to consume the electricity of the supporting capacitors of the fuel electric air compressor controller (5) and the high-voltage component (6), and the active electric power discharge of the fuel electric air compressor controller (5) and the high-voltage component (6) is completed.
5. A high-voltage power down method of a hydrogen energy automobile pre-charging and discharging system as set forth in claim 3 or 4 is characterized in that when a fuel-electric air compressor and a high-voltage component (6) are provided with an active discharging function, in the high-voltage power down process, the switch K6, the switch K0 and the switch K1 are disconnected, the motor controller (3) starts to start discharging, after discharging, the whole automobile driving motor (11) is powered down, then the switch K2 and the switch K3 are disconnected, the fuel-electric air compressor controller (5) starts to perform active discharging to discharge the fuel-electric air compressor and the high-voltage component (6), and after discharging is completed, branch power down is completed.
6. A pre-charging method for a hydrogen energy automobile pre-charging and discharging system is characterized by comprising the specific steps of closing a switch K6 when the whole automobile is electrified at high voltage, closing the switch K1 firstly, limiting current through a first pre-charging resistor R1, pre-charging a motor controller (3) and a buck DCL (4) by high voltage from a high-voltage auxiliary power supply (1) and a fuel boost FCDC (2), closing the switch K0 firstly after the pre-charging is completed, opening the switch K1 after the pre-charging is completed, completing the pre-charging of the motor controller (3) and the buck DCL (4), closing the switch K3, pre-charging a fuel air compressor controller (5) and a high-voltage component (6), closing the switch K2 firstly, and then opening the switch K3 after the pre-charging is completed, and completing the pre-charging of the fuel air compressor controller (5) and the high-voltage component (6).
7. A pre-charging method for a hydrogen energy automobile pre-charging and discharging system is characterized by comprising the specific steps of closing a switch K6 when the whole automobile is electrified at high voltage, closing a switch K3, limiting current through a second pre-charging resistor R2, starting pre-charging a fuel cell air compressor controller (5) and a high-voltage component (6), closing the switch K2 and then opening the switch K3 after pre-charging is completed, completing pre-charging of the fuel cell air compressor controller (5) and the high-voltage component (6), closing the switch K1 again, and pre-charging a motor controller (3) and a step-down DCL (4) by high voltage from a high-voltage auxiliary power supply (1) and a fuel cell step-up FCDC, opening the switch K1 after pre-charging is completed after the switch K0 is closed, and completing pre-charging of the motor controller (3) and the step-down DCL (4).
8. A pre-charging method for a hydrogen energy automobile pre-charging and discharging system is characterized by comprising the specific steps of closing a switch K6 when the whole automobile is electrified at high voltage, then closing the switch K1 and the switch K3 simultaneously, carrying out current limiting through a first pre-charging resistor R1 and a second pre-charging resistor R2 to pre-charge a fuel gas compressor controller (5) and a high-voltage component (6), closing the switch K2 or the switch K0 corresponding to a corresponding pre-charged loop after the pre-charging is completed, and then opening the corresponding switch K1 and the corresponding switch K3 to complete pre-charging of the fuel gas compressor controller (5) and the high-voltage component (6), a motor controller (3) and a voltage-reducing DCL (4).
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| CN112977176B (en) * | 2021-03-19 | 2025-01-21 | 黄冈格罗夫氢能汽车有限公司 | Double pre-charging circuit for hydrogen energy vehicle and method for pre-charging and high-voltage power-down thereof |
| CN113479066B (en) * | 2021-08-17 | 2023-03-24 | 金华氢途科技有限公司 | High-integration-level multifunctional high-voltage distribution box for forklift |
| CN113829965B (en) * | 2021-10-31 | 2023-03-28 | 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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