Fuel feeding method for liquid fuel cell

Abstract

The invention relates to a kind of fuel supplying method which is used in liquid fuel battery. Firstly building the first curve equation and the second curve equation according to different electric load value and corresponding critical consistence value, critical power value, thereinto the first curve equation is used to calculate the critical consistence value of fuel on condition that the load possesses known electric load value, and the second curve equation is used to calculate the critical power value of load on condition that the load possesses known electric load value. When the consistence of the fuel changes, testing the electric load value and power value wasted by load, using the first curve equation and the second curve equation to calculate the critical consistence value and the critical power value of the load. Judging whether the power value wasted by load is not bigger than the critical power value calculated, if it is, new fuel is supplied to the liquid fuel battery.

Description

technical field [0001] The invention relates to a fuel supply method, in particular to a method capable of supplying liquid fuel with stable and proper concentration to a liquid fuel cell device for a long time. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy stored in fuel and oxidant into electrical energy through electrode reactions. There are quite a few types of fuel cells, and the classification methods are also different. If they are distinguished according to the nature of the electrolyte, there are alkaline fuel cells, phosphoric acid fuel cells, proton exchange membrane fuel cells, molten carbonate fuel cells, solid state oxidation Fuel cells with five different electrolytes, such as biological fuel cells. Among them, the proton exchange membrane fuel cell also includes the so-called direct methanol fuel cell, which directly uses methanol as fuel without first transforming it into hydrogen. It is one of...

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Problems solved by technology

[0004] However, according to the prior art, during the operation of the liquid fuel cell, since it is impossible to precisely know when to add new liquid fuel and the appropriate amount of addition, the concentration of the liquid fuel after replenishment will gradually deviate from time to time. It is outside the optimal range set at the beginning, so the overall power output performance of the liquid fuel cell cannot reach the ideal state in the end. This defect has always been one of the reasons why the existing liquid fuel cells cannot be commercialized smoothly.

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