Electronic load, system and method for evaluating fuel cell electric discharge performance
An electronic load and fuel cell technology, applied in fuel cells, circuits, measuring electricity, etc., can solve the problems of inability to adjust the resistance size, inability to achieve ultra-small on-resistance, etc., and achieve the effect of stable performance and strong adaptability
Active Publication Date: 2010-08-25
BYD CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to provide an electronic load that can realize ultra-small on-resistance and adjust the size of the resistance against the shortcomings of the existing electronic load that the voltage at both ends of the fuel cell is small and cannot realize the ultra-small on-resistance and the size of the resistance cannot be adjusted. electronic load
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[0021] The present invention provides an electronic load. As shown in FIG. 1, the electronic load includes a load module 1. As shown in FIG. 2, the load module 1 includes a transistor 8 and an adjustment circuit 9, and the adjustment circuit 9 is used to adjust the On-resistance, wherein the electronic load also includes a switching device 4, a DC power supply 2 and two branches, the DC power supply 2 is connected in series on one of the branches, and the switching device 4 is used to switch circuits, so that the load module 1 and the One of the two branches connects.
[0022] The switching device 4 can be a single pole double throw switch. The single-pole end of the SPDT switch is connected to the load module 1, one end of the double-throw end of the SPDT switch is connected to the branch circuit with the DC power supply 2 in series, and the other end of the double-throw end of the SPDT switch is connected to the DC power supply 2 without series connection. branch connection...
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The invention relates to an electronic load, which comprises a loading module (1), the loading module (1) comprises a transistor (8) and an adjusting circuit (9), and the adjusting circuit is used for adjusting the on-resistance of the transistor. The invention is characterized in that the electronic load also comprises a switching device (4), a direct current power supply (2) and two sub-circuits, the direct current power supply (2) is connected with one of the two sub-circuits in series, and the switching device (4) is used for ensuring the load module (1) to be connected with one of the two sub-circuits. The invention overcomes the faults that in the prior electronic load, when the voltage of the two ends of the fuel battery is smaller than a certain value, super small on-resistance can not be realized, and the resistance capacity can not be adjusted. The electronic load provided by the invention is adopted by the system and method of evaluating the discharging performance of the fuel battery provided by the invention, the performance is stable, and the adaptability is strong.
Description
technical field [0001] The invention relates to fuel cell technology, in particular to an electronic load, a system and a method for evaluating the discharge performance of a fuel cell. Background technique [0002] Due to the existence of the internal resistance of the fuel cell, when the current passing through the fuel cell is large, the voltage consumed on the internal resistance of the fuel cell is also large, so that the voltage value at both ends of the fuel cell decreases. In the fuel cell preparation process, it is necessary to obtain the polarization curve of the fuel cell through the discharge equipment to evaluate the discharge performance of the fuel cell. [0003] The polarization curve of the fuel cell refers to the U-I curve of the voltage and current at both ends of the fuel cell during the process of the positive and negative poles of the fuel cell from open circuit to short circuit. Therefore, in order to obtain the polarization curve of the fuel cell, it ...
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IPC IPC(8): H01M8/00G01R31/36
CPCY02E60/50
Inventor 赵志强董俊卿张振
Owner BYD CO LTD