The difference between fuel cells and ordinary batteries

A fuel cell is an energy conversion device that must have an energy (fuel) input to produce electricity. Ordinary storage battery is an energy storage device. It must first store electrical energy into the battery. It can only output electric energy during operation. It does not need to input energy or generate electric energy during operation. This is the essential difference between fuel cell and ordinary battery.

Once the technical performance of the fuel cell is determined, the electric energy that can be generated is only related to the supply of the fuel. As long as the source continuously supplies the fuel, the electric energy can be continuously generated, and the discharge characteristics are continuously performed. After the technical performance of the ordinary battery is determined, the electric energy can only be output within its rated range, and it must be repeated after repeated charging, and the discharge characteristics are intermittent.

The mass and volume of the fuel cell body are not large, but the fuel cell requires a fuel storage device or fuel conversion device and ancillary equipment to obtain hydrogen, and the quality and volume of these fuel storage devices or fuel conversion devices and ancillary devices are far. Exceeding the fuel cell itself, during the work process, the fuel will gradually be consumed with the generation of the fuel cell power, and the quality is gradually reduced (referring to the vehicle limited fuel). Ordinary batteries have no other auxiliary equipment. After the technical performance is determined, the quality and volume of the battery are basically the same whether the battery is fully charged or discharged.

Fuel cells convert chemical energy into electrical energy. Common batteries also convert chemical energy into electrical energy. This is what they have in common. However, when fuel cells generate electricity, the reactive substances participating in the reaction are continuously consumed after being reacted. Reuse; therefore, it is required to continuously input the reaction substance. The active material of an ordinary battery changes with the charging and discharging of the battery, and the active material repeatedly undergoes a reversible chemical change, the active material is not consumed, and only some electrolyte or the like needs to be added.

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