Fuel cell`s e.g. direct methanol-fuel cell, mixing unit for use as power source, has piezo pumps controlled by control unit to remove and dose reaction material, where pump module, control unit and tank module form compact unit

摘要

The unit has piezo pumps (20) controlled by a control unit (3) for removing and dosing of reaction material e.g. methanol, from a methanol reservoir (6) and a water reservoir (7) and from a mixing line for mixing the materials. The pumps are adjusted to a pre-defined methanol concentration of the mixture in the mixing line. The reservoirs are accommodated in a tank module (1), and are open upwards. The reservoirs are covered by respective chamber cover surface of a pump module (2), where the pump module, the control unit and the tank module form a compact unit. An independent claim is also included for a method for controlling a mixing unit.