CN100491154C - Method for controlling output power of vehicular fuel cell system - Google Patents
Method for controlling output power of vehicular fuel cell system Download PDFInfo
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- CN100491154C CN100491154C CNB2006100121463A CN200610012146A CN100491154C CN 100491154 C CN100491154 C CN 100491154C CN B2006100121463 A CNB2006100121463 A CN B2006100121463A CN 200610012146 A CN200610012146 A CN 200610012146A CN 100491154 C CN100491154 C CN 100491154C
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Abstract
Disclosed is an output power control method for a fuel cell system of a vehicle belonging to fuel cell automobile research and development technology field. A vehicle controller can compute a target torque of a motor according to a driver's intentions (such as key signal, accelerator pedal signal, brake pedal signal, gearshift signal), compute the motor power demand according to the motor rotation speed, and obtain a target output power of the fuel cell system according to the motor power demand and work state signals of the cell; then the vehicle controller can obtain a target input voltage of a DC/DC transformer according to the relationship between the fuel cell output power and output voltage, and send the instruction to the DC/DC transformer. The DC/DC transformer can perform PI closed loop control according to the target input voltage and actual output current, so as to realize direct control on the output power of the fuel cell system. The invention has high control precision, high response speed.
Description
Technical field
The present invention relates to a kind of control method of output power of vehicular fuel cell system, belong to fuel cell powered vehicle research and development technology field.
Background technology
Because having premium properties such as low, the efficient and zero-emission of running noises, fuel cell powered vehicle is widely regarded as following developing of automobile industry trend, country's " 15 " 863 Program has been set up the project of fuel-cell car and fuel battery city carriage specially, and the research and development of fuel cell powered vehicle have become the major action that promotes Domestic Automotive Industry realization great-leap-forward development.The correlation technique of fuel cell powered vehicle power system is one of gordian technique in the fuel cell powered vehicle research and development technology field.
Fuel cell power system is the core of fuel cell powered vehicle, is the key of decision entire car of fuel cell car performance, also is its important symbol that is different from traditional combustion engine automobile, battery electric vehicle and oil-electricity mixed power automobile.In general, the power system of fuel cell powered vehicle mainly is made up of fuel cell system (comprising fuel cell pile, fuel cell accessory equipment and fuel cell controller etc.), storage battery (or super capacitor) and management system, motor and electric machine controller thereof and power electronic equipment (as DC/DC changer, inverter, electronic switch etc.) etc.It can produce the explosive motor of pollutant emission when using the fuel cell system of efficient (work efficiency can reach more than 40%), cleaning (blowdown is clean water) to substitute the lower and work of efficient, and auxiliary auxiliary power unit discharging and recharging---storage battery (or super capacitor etc.) has remedied that fuel cell system peak power fan-out capability is poor, dynamic response slow and can not reclaim defective such as braking energy.Therefore, fuel cell power system as shown in Figure 1 is widely regarded as one of desirable power system of following automobile.
In fuel cell power system shown in Figure 1, connect the DC/DC changer after the fuel cell system, then be connected with electric machine controller, work by the electric machine controller drive motor; On DC/DC changer and dc bus that electric machine controller is connected, and connect storage battery.In this power system structure, fuel cell system is as main power resources, and storage battery is as auxiliary power unit.The effect of DC/DC changer in fuel cell power system is the horsepower output of control fuel cell system, and then reaches the purpose of reasonable distribution fuel cell system and storage battery horsepower output.
Present key problem in technology is, how controls the horsepower output of fuel cell system by the DC/DC changer.Usual way has two kinds: a kind of is the horsepower output of controlling fuel cell system by the output voltage of control DC/DC changer.As shown in Figure 2, entire car controller calculates the target torque of motor according to driver's driving intention (key signal, accelerator pedal signal, brake pedal signal, gear signal), simultaneously according to rotating speed of motor, calculate the power demand of motor, according to the power demand of motor and the working state signal of storage battery, obtain the size of the target output of fuel cell system, while is according to the mode of operation of storage battery, rule of thumb calculate the target output voltage of DC/DC changer, and give DC/DC changer this instruction.The DC/DC changer carries out the PI closed loop control according to target output voltage and actual output voltage.If fuel cell system real output and target output equate, then carry out next step control, otherwise recomputate the target output voltage of DC/DC changer.This control method, the response time of control can reach several milliseconds to tens milliseconds than very fast; But control accuracy is relatively poor, and by control, difference is between several kilowatts to ten kilowatts between fuel cell system real output and the target output; Another kind of control method is to control the horsepower output of fuel cell system by the outgoing current of control DC/DC changer.As shown in Figure 3, entire car controller calculates the target torque of motor according to driver's driving intention (key signal, accelerator pedal signal, brake pedal signal, gear signal), simultaneously according to rotating speed of motor, calculate the power demand of motor, according to the power demand of motor and the working state signal of storage battery, obtain the size of the target output of fuel cell system, while is according to the mode of operation of storage battery, rule of thumb calculate the target outgoing current of DC/DC changer, and give DC/DC changer this instruction.The DC/DC changer carries out the PI closed loop control according to target outgoing current and actual output current.If fuel cell system real output and target output equate, then carry out next step control, otherwise recomputate the target outgoing current of DC/DC changer.This control method, the more preceding a kind of method of the response time of control want slow, can reach tens of milliseconds to hundreds of milliseconds; But control accuracy is higher, and by control, difference is between hundreds of watts to thousands of watts between fuel cell system real output and the target output; These two kinds of control methods are not all carried out direct control to the horsepower output of fuel cell system.
Summary of the invention
The objective of the invention is to control the horsepower output of fuel cell system by the input voltage of control DC/DC changer for a kind of output power control method of fuel cell system is provided.This control method, response time reach several milliseconds between tens milliseconds, and the departure to fuel cell output power reaches tens of watts simultaneously.
In order to achieve the above object, solution of the present invention is: fuel cell system outlet power and fuel cell system output relation, the characteristics that to be fuel cell system outlet voltage reduce with the increase of fuel cell system horsepower output and the two concern one to one, with fuel cell system output voltage (also being the input voltage of DC/DC changer) as controlling quantity, thereby realize direct control to the fuel cell system horsepower output.
A kind of control method of output power of vehicular fuel cell system, this control method may further comprise the steps:
The 1st step: entire car controller calculates the target torque of motor according to key signal, accelerator pedal signal, brake pedal signal, gear signal;
The 2nd step: entire car controller calculates the power demand of motor according to the target torque and the rotating speed of motor;
The 3rd step: entire car controller obtains the size of the target output of fuel cell system according to the power demand of motor and the working state signal of storage battery;
The 4th step: entire car controller obtains the target input voltage of DC/DC changer according to the relation of fuel cell system horsepower output and output voltage;
The 5th step: entire car controller is given DC/DC changer with the target input voltage instruction of DC/DC changer, the DC/DC changer carries out the PI closed loop control according to target input voltage and the actual input voltage of DC/DC changer, thereby realizes the direct control to the fuel cell system horsepower output;
The 6th step:, otherwise recomputate the target input voltage of DC/DC changer if fuel cell system real output and target output equate that entire car controller is then carried out next step control.
Owing to adopt technique scheme, the present invention compared with prior art has following advantage: 1) output power of vehicular fuel cell system control method of the present invention is by to the control of fuel cell system output voltage and then realize direct control to the fuel cell system horsepower output, control accuracy is higher, and the departure of fuel cell system horsepower output is reached tens of watts; 2) owing to adopt fuel cell system output voltage (being the input voltage of DC/DC changer) as controlled variable, so control response speed is very fast, response time reaches several milliseconds between tens milliseconds.
Description of drawings
Fig. 1 is a vehicle fuel battery power system structural representation.
Fig. 2 is the control method scheme drawing of existing a kind of output power of vehicular fuel cell system.
Fig. 3 is the control method scheme drawing of existing another output power of vehicular fuel cell system
Fig. 4 is the control method scheme drawing of the output power of vehicular fuel cell system that proposes of the present invention.
The specific embodiment
With reference to Fig. 4, Fig. 4 is the control method scheme drawing of the output power of vehicular fuel cell system that proposes of the present invention.A kind of control method of output power of vehicular fuel cell system, this method is come the output of direct control fuel cell output power with the DC/DC changer, be embodied in: in fuel cell power system shown in Figure 1, entire car controller is according to driver's driving intention (key signal, accelerator pedal signal, the brake pedal signal, gear signal) calculates the target torque of motor, simultaneously according to rotating speed of motor, calculate the power demand of motor, according to the power demand of motor and the working state signal of storage battery, obtain the size of the target output of fuel cell system, relation according to fuel cell output power and output voltage, obtain the target input voltage of DC/DC changer, and give DC/DC changer this instruction.The DC/DC changer carries out the PI closed loop control according to target input voltage and the actual input voltage of DC/DC changer, thereby realizes the direct control to the fuel cell system horsepower output.If fuel cell system real output and target output equate, then carry out next step control, otherwise recomputate the target input voltage of DC/DC changer.
Be according to one embodiment of present invention:
A kind of control method of output power of vehicular fuel cell system, this control method may further comprise the steps:
The 1st step: entire car controller calculates the target torque of motor according to key signal, accelerator pedal signal, brake pedal signal, gear signal;
The 2nd step: entire car controller calculates the power demand of motor according to the target torque and the rotating speed of motor;
The 3rd step: entire car controller obtains the size of the target output of fuel cell system according to the power demand of motor and the working state signal of storage battery;
The 4th step: entire car controller obtains the target input voltage of DC/DC changer according to the relation of fuel cell system horsepower output and output voltage;
The 5th step: entire car controller is given DC/DC changer with the target input voltage instruction of DC/DC changer, the DC/DC changer carries out the PI closed loop control according to target input voltage and the actual input voltage of DC/DC changer, thereby realizes the direct control to the fuel cell system horsepower output;
The 6th step:, otherwise recomputate the target input voltage of DC/DC changer if fuel cell system real output and target output equate that entire car controller is then carried out next step control.
The present invention verifies in the fuel battery city carriage of the project development of country's " 15 " 863 fuel battery city carriages, has obtained the effect of expection control preferably.
Claims (1)
1, a kind of control method of output power of vehicular fuel cell system is characterized in that, this control method may further comprise the steps:
The 1st step: entire car controller calculates the target torque of motor according to driver's key signal, accelerator pedal signal, brake pedal signal, gear signal;
The 2nd step: entire car controller calculates the power demand of motor according to the target torque and the rotating speed of motor;
The 3rd step: entire car controller obtains the size of the target output of fuel cell system according to the power demand of motor and the working state signal of storage battery;
The 4th step: entire car controller obtains the target input voltage of DC/DC changer according to the relation of fuel cell system horsepower output and output voltage;
The 5th step: entire car controller is given DC/DC changer with the target input voltage instruction of DC/DC changer, the DC/DC changer carries out the PI closed loop control according to target input voltage and the actual input voltage of DC/DC changer, thereby realizes the direct control to the fuel cell system horsepower output;
The 6th step:, otherwise recomputate the target input voltage of DC/DC changer if fuel cell system real output and target output equate that entire car controller is then carried out next step control.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100121463A CN100491154C (en) | 2006-06-07 | 2006-06-07 | Method for controlling output power of vehicular fuel cell system |
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| CNB2006100121463A CN100491154C (en) | 2006-06-07 | 2006-06-07 | Method for controlling output power of vehicular fuel cell system |
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| CN100491154C true CN100491154C (en) | 2009-05-27 |
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Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4424418B2 (en) * | 2007-12-26 | 2010-03-03 | トヨタ自動車株式会社 | Fuel cell system and fuel cell vehicle |
| CN101450626B (en) * | 2008-12-25 | 2011-02-02 | 清华大学 | Wiring system of vehicle-mounted electrical system for fuel cell automobile |
| WO2010114036A1 (en) * | 2009-03-31 | 2010-10-07 | 日立建機株式会社 | Construction machine and industrial vehicle provided with power supply system |
| WO2011013213A1 (en) * | 2009-07-29 | 2011-02-03 | トヨタ自動車株式会社 | Fuel cell system |
| US9105892B2 (en) * | 2010-03-15 | 2015-08-11 | GM Global Technology Operations LLC | Adaptive method for conversion of external power request to current setpoint to a fuel cell system based on stack performance |
| CN105966255A (en) * | 2016-05-10 | 2016-09-28 | 清华大学 | Control method of output power of vehicle fuel battery system |
| CN106584448B (en) * | 2016-11-21 | 2019-08-16 | 上海电力学院 | Mobile welding robot drive system and method based on fuel cell hybrid |
| CN108482172B (en) * | 2018-05-23 | 2024-01-02 | 威腾电气集团股份有限公司 | Three-in-one vehicle-mounted DCDC integrated power supply |
| CN108819767B (en) * | 2018-06-29 | 2020-06-09 | 奇瑞汽车股份有限公司 | Control method and device for hydrogen fuel cell automobile power system |
| CN110103776B (en) * | 2019-05-06 | 2022-06-03 | 重庆大学 | Fuel cell whole vehicle power demand change prediction method based on intelligent iterative learning |
| CN110970972B (en) * | 2019-11-22 | 2020-11-24 | 珠海格力电器股份有限公司 | Control method and device of DCDC converter, storage medium and power supply |
| CN111258365B (en) * | 2020-03-04 | 2021-11-16 | 北京亿华通科技股份有限公司 | Power control method of fuel cell system |
| CN111361459B (en) * | 2020-03-31 | 2021-09-03 | 中国汽车技术研究中心有限公司 | Voltage control method for hydrogen fuel cell vehicle with smaller power demand |
| CN113525106B (en) * | 2020-04-13 | 2023-11-17 | 广州汽车集团股份有限公司 | DC/DC converter and control method thereof |
| CN111682759B (en) * | 2020-04-20 | 2023-09-22 | 珠海格力电器股份有限公司 | Fuel cell DC-DC converter operation control method, computer readable storage medium and fuel cell |
| CN112636590A (en) * | 2020-12-16 | 2021-04-09 | 佛山仙湖实验室 | Adjustable high-power DC/DC converter for hybrid electric vehicle |
| CN113098261A (en) * | 2021-04-06 | 2021-07-09 | 佛山仙湖实验室 | Control method of adjustable high-power DC/DC converter of hybrid electric vehicle |
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