An experimental method for testing the efficiency of a fuel cell vehicle vehicle system
A vehicle system, fuel cell technology, applied in the direction of vehicle testing, machine/structural component testing, testing of electrical devices in transportation, etc., can solve problems such as power battery charging, discharging efficiency, complexity, etc., to achieve testing Comprehensive, easy-to-manipulate effects
Active Publication Date: 2022-02-22
JIANGLING MOTORS
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- Application Information
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Problems solved by technology
The disadvantage of this method at present is that it only considers the high efficiency range of the fuel cell engine, and does not consider the influence of vehicle factors such as the charging and discharging efficiency of the power battery, the power of the motor, and the power of high-voltage accessories, and these influencing factors are intricate. To do the best energy management, you must know the total efficiency point of the entire vehicle system, and then select the point with the highest efficiency of the entire vehicle system for control
Method used
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Embodiment 1
[0036] There are three independent variables in this test, vehicle speed, driving torque, and fuel cell engine power value. The data to be tested include the hydrogen mass change △m estimated by the fuel cell system, and the actual power used by the drive motor system P m , the actual power P of the high-voltage accessory system e , the actual power value of the power battery P B , the single test time of each fuel cell engine test point △ t According to these test data, the efficiency of the vehicle system is calculated by using the calculation formula.
[0037] When the power battery is in the charging state, the efficiency calculation formula is as follows:
[0038]
[0039] When the power battery is in the discharge state, the efficiency calculation formula is as follows
[0040]
[0041] The specific test steps are:
[0042] Step (1) is specifically the vehicle speed point V of the stable working point 0 , The minimum torque point Trq at this vehicle speed 0 ;...
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The invention relates to the field of electric vehicles, in particular to an experimental method for testing the efficiency of a complete vehicle system of a fuel cell vehicle. The method of the invention can test the efficiency maps of the whole vehicle system under the conditions of different vehicle speeds and different driving torques in the power assembly bench laboratory, so as to determine the optimal working point of the fuel cell engine. The method of the present invention is easy to operate, and the test is comprehensive, and factors such as the charging and discharging efficiency of the power battery, the power of the motor, and the power of the high-voltage accessories are fully considered in the calculation of the vehicle efficiency, and the total efficiency point of the vehicle efficiency can be obtained more accurately .
Description
technical field [0001] The invention relates to the field of electric vehicles, in particular to an experimental method for testing the efficiency of a complete vehicle system of a fuel cell vehicle. Background technique [0002] As a clean energy source, fuel cells have attracted more and more attention. In the past two years, fuel cell electric vehicles have also developed rapidly. The main difference between fuel cell electric vehicles and pure electric vehicles is the energy source. The energy source of pure electric vehicles depends entirely on It is obtained by external charging, while the energy source of fuel cell electric vehicles mainly depends on H 2 If the power of the fuel cell engine is large enough and the energy control is good enough, the energy source of the fuel cell electric vehicle can completely rely on H 2 The electrochemical reaction is obtained without external charging, which can save electricity and better utilize clean energy to protect the envir...
Claims
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IPC IPC(8): G01R31/00G01M17/007
CPCG01R31/006G01M17/007
Inventor 李立闯魏广杰刘永游道亮
Owner JIANGLING MOTORS