FUEL CELL VOLTAGE STABILIZATION APPARATUS

Abstract

A fuel cell voltage stabilization apparatus is disclosed. The apparatus utilizes electronic circuits for voltage modulation to stabilize and fix the voltage load for a fuel cell. The apparatus comprises a voltage boost circuit and a voltage reducing circuit, which are realized by electronic circuits to stabilize an output voltage of the fuel cell and fix the output voltage to the loading.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:

FIG. 1 is an illustrative view of an embodiment of a fuel cell voltage stabilization apparatus of the invention; and

FIG. 2 is an illustrative view of an embodiment of the voltage boost circuit.

Claims

1. A fuel cell voltage stabilization apparatus, comprising: a fuel cell configured to provide power source of a loading terminal;a voltage boost circuit configured to raise an output voltage of the fuel cell; anda voltage reducing circuit configured to reduce the output voltage of the fuel cell;wherein the voltage boost circuit comprises a switching device configured to switch the voltage boost circuit alternatively between an ON status and an OFF status.

2. The fuel cell voltage stabilization apparatus as claimed in claim 1, wherein the switching device of the voltage boost circuit further comprises: a first switch element configured to control the voltage boost circuit to cut off input and output when the voltage boost circuit is inoperative;a second switch element configured to control an operative period of the voltage boost circuit; anda controller;wherein the voltage boost circuit is switched alternatively by the first switch element and the second switch element to obtain the output voltage larger than an input voltage.

3. The fuel cell voltage stabilization apparatus as claimed in claim 2, wherein the first switch element comprises an active diode element.

4. The fuel cell voltage stabilization apparatus as claimed in claim 2, wherein the second switch element comprises a metal oxide semiconductor field effect transistor (MOSFET) switch element.

5. The fuel cell voltage stabilization apparatus as claimed in claim 1, wherein the voltage reducing circuit is a low dropout voltage linear regulator.

6. The fuel cell voltage stabilization apparatus as claimed in claim 1, wherein the fuel cell is a direct methyl alcohol fuel cell.

7. The fuel cell voltage stabilization apparatus as claimed in claim 1, wherein the fuel cell further comprises a rechargeable battery cell to provide power source of the loading terminal in a predetermined output voltage in correspondence with the fuel cell.

8. The fuel cell voltage stabilization apparatus as claimed in claim 7, wherein the rechargeable battery cell is selected from a lithium battery cell and other power source device to provide power source of the loading terminal.