Self-breathing portable power supply

Abstract

The portable power supply includes through binding bolt cascaded energy unit of hydrogen fuel set and power unit of fuel cell pile composed of bipolar plate, membrane electrode, fuel fluid field plate, air flow field plate, afflux plate, end plate and gasket. Annular bipolar plate having grooves for distributing gas on two sides instead of metal separate board is adopted in the invention. Eliminating complicated drain tap and simplified fastener ingrates unit of source of hydrogen and fuel cell pile in type of self-respiration. Features are: favorable air-tightness, lowered cost, weight, and cost. It is a convenient portable electrical source: no need have charged from AC, self-respiration without manual intervention.

Description

field of invention [0001] The invention belongs to the technical field of fuel cells, and mainly relates to a self-breathing air portable power source of a polymer electrolyte fuel cell based on an integrated fuel device. Background technique [0002] The invention relates to an air-breathing portable power supply, which has the characteristics of light weight, no noise and zero pollution. This kind of portable power supply can be used for many purposes, for example, it can be used as a clean energy source for outdoor activities, vehicles, household electronic equipment, personal electronic equipment, etc. This portable power supply is mainly composed of the energy unit of the hydrogen fuel device and the fuel cell stack The power unit consists of two parts, the hydrogen fuel device can be a hydrogen storage device or a hydrogen generator, and the fuel cell stack is a self-suction air-adaptive solid polymer cell stack. Compared with the usual fuel cell stacks that are press...

AI Technical Summary

Problems solved by technology

[0004] However, in the above traditional air-breathing battery stack design, there are still big problems: first, in the above-mentioned patents, more or less metal separators are used, which increases the weight and volume of the battery stack, and further The important thing is to increase the contact interface in the battery stack, which leads to an increase in internal resistance, and the metal surface is easily corroded, and the internal resistance will increase as the discharge progresses, thereby reducing the output power of the entire battery stack

If the discharge time of the exhaust valve is insufficient, the electrical performance will decrease; but if the exhaust valve discharges frequently, a large amount of fuel hydrogen will be wasted

On the other hand, although the exhaust valve can also be operated by an automatic device, the exhausted hydrogen fuel can also be recovered by a hydrogen pump, but this will greatly reduce the passive operation of the battery stack.

In addition, because hydrogen is flammable and explosive, the intermittent direct discharge of the exhaust valve has a negative impact on the safety of the application

Of course, there are still many problems such as heavy maintenance work, complex shape and large size.

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