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Load controlling method for fuel cell test
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A fuel cell and control method technology, which is applied in the direction of fuel cell control, fuel cell, fuel cell additives, etc., can solve problems such as difficult to accurately control resistance and limited adjustable range of total resistance, and achieve the effect of no short circuit
Active Publication Date: 2011-01-26
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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[0013] Fuel cells must be tested before use. The current test method is usually to connect several loads in series, then parallel, or partially parallel and then series, and connect them to the test station. When the load is turned on, several resistors are usually turned on together. , it is difficult to accurately control each resistor, so that the adjustable range of the total resistance is limited
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Embodiment 1
[0031] As shown in Figure 1, a load control method for fuel cell testing includes CPU circuit U1, CAN bus U2, and 1000 load thermal resistors R1, R2, R3...R1000, electronic switches V1, V2, V3 ...V1000 and photoelectric coupling drive circuits G1, G2, G3...G1000, the CAN bus U2 interface is connected to each current limitingresistor R1', R2', R3'...R1000' through the CPU circuit U1, each Current limiting resistors R1', R2', R3'...R1000' are respectively connected to a photoelectric coupling drive circuit G1, G2, G3...G1000 and an electronic switch V1, V2, V3...V1000, through the MOSFETelectronic switch V1, V2, V3...V1000 control the on-off of load thermal resistors R1, R2, R3...R1000. Through the communication port setting, the CPU controls the number of on-off loads R1, R2, R3...R1000, so that The size of the power consumption load can vary from 0.1Ω to 100Ω.
[0032]The power of the load thermal resistors R1~R100 is 0.5KW, the power of the load thermal resistors R101~R200...
Embodiment 2
[0036] Connect R1~R10 in series, R11~R15 in series, and R16~R18 among the load thermal resistors R1, R2, R3...Rn in series. The load thermal resistors can be connected in series first and then in parallel as required. Simulate the fuel cell used as a vehicle engine to carry out a loading test under the running conditions of the vehicle. The program is preset, and the CPU automatically controls the IGBT electronic switch to turn on or off the load thermal resistor. In a cold state, turn on the 60KW load thermal resistor for two minutes. Turn off the load thermal resistance, idle for 15 minutes, gradually increase the load by 0.5KW each time to 18KW for two minutes, continue to increase to 32KW for two minutes, then increase to 50KW for two minutes, and then increase to 65KW for two minutes, Finally, after increasing to 80KW and running for 60 minutes, reduce the load to 50KW and run for two minutes, suddenly increase to 100KW and run for 4 minutes, and then gradually turn off so...
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Abstract
The invention relates to a method for controlling load for a fuel cell test. A device comprises a CPU, a communication bus interface and a plurality of loads, electronic switches and photocoupling drive circuits; the communication bus interface is connected with each load through the CPU; each load is connected with a photocoupling drive circuit and a electronic switch respectively; through the setting of the communication port, the CPU controls the conduction number of opening and closing the load so as to realize the adjustment of size of the power consumption load. Compared with the prior art, the method can automatically control the size of load for the fuel cell test, has no fault of short circuit and no spark, and is safe and reliable.
Description
technical field [0001] The invention relates to fuel cells, in particular to a method for controlling loads used for fuel cell testing. Background technique [0002] An electrochemical fuel cell is a device that converts hydrogen and oxidants into electrical energy and reaction products. The internal core component of the device is the membrane electrode (Membrane Electrode Assembly, referred to as MEA). The membrane electrode (MEA) is composed of a proton exchange membrane and two porous conductive materials, such as carbon paper, sandwiched between the two sides of the membrane. On the two boundary surfaces of the membrane and the carbon paper, there are even and finely dispersed catalysts for initiating electrochemical reactions, such as metalplatinum catalysts. Conductive objects can be used on both sides of the membrane electrode to draw the electrons generated during the electrochemical reaction through an external circuit to form a current loop. [0003] At the ano...
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