Power supply system of direct liquid fuel battery and its operation method
A liquid fuel cell and power system technology, applied in fuel cells, fuel cell additives, fuel cell components, etc., can solve problems such as system complexity, and achieve the effect of being easy to carry and preventing reverse voltage.
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[0032] Example 1.
[0033] The principle of the power supply system of the present invention is shown in FIG. 1, including: a fuel cell main body, a fuel supply part, an oxidizer supply part and a control unit part, and the machine entity is shown in FIG. 5.
[0034]The high-concentration second liquid fuel starts from the high-concentration liquid fuel cartridge 9 and enters the mixing tank 8 through the micro metering pump 10 to mix with the low-concentration fuel to form the first liquid fuel, and then passes through the micro-channel heat under the action of the fuel circulation pump 11 The exchanger 3 is preheated, and then enters the stack 1 through the filter 17 (mainly cation exchange resin); the air first passes through the filter 13 and the air pump or blower 14, and is also preheated by the micro-channel heat exchanger 3 , Also enters the fuel cell stack 1. In the fuel cell, the fuel and oxidant react on the membrane electrode assembly to generate electricity and heat. ...
Example Embodiment
[0042] Example 2.
[0043] The direct methanol fuel cell power supply system of the present invention is tested jointly with a notebook computer, as shown in FIG. 6. A plurality of digital voltmeters 23 and ammeters 22 are connected to the fuel cell power supply system 19 to measure fuel cell output, backup battery output, and power consumed by the notebook computer 24, respectively. Their data is monitored at any time through a recording computer 21. Since the notebook computer 24 belongs to a wide range voltage input load (9-22V), the stack 1 and the backup battery in this system do not go through the power conversion circuit after being mixed, but switch to the direct external output file, which reduces the power of the circuit itself. Consumption.
[0044] In the second embodiment, the methanol concentration is controlled at about 0.5M, the battery temperature is set at 85°C, and the peak power of the fuel cell can reach more than 35W. The front end is the start-up phase. The ...
Example Embodiment
[0045] Example 3.
[0046] The direct liquid fuel cell power supply system of the present invention serves as a multifunctional power supply (see Figure 8). For a constant voltage input load, the stack 1 and the backup battery in the system must be switched to pass through the power conversion circuit 16b and then output to the outside after being mixed. After voltage conversion, the power supply system 19 can be set as a mobile power supply for the 12V or 3.3V constant voltage load 20.
[0047] The output voltage is set to 12V, and the output current is set to 0.5A. In this embodiment, the methanol concentration is controlled at 0.25M for nearly 10 hours during the test (see Figure 8, where 21 is a recording computer; 22 is an ammeter; 23 is a voltmeter), the voltage of the stack 1 is stable at about 18.5V, because The output power is small, and the output voltage of the stack is relatively high. During the connection period of the stack 1, all the power is supplied by the stack ...
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