Canon Inc. has exhibited fuel cells that run on hydrogen at the "Canon EXPO 2005." In addition to mockups on display at the exhibition site, fuel cells were mounted on Canon's digital cameras demonstrating actual operation. Although the fuel cells presently have a volume energy density equivalent to lithium ion secondary batteries of the same size, the company aims to realize densities three to five times larger in the future.
The fuel cell mockups on display include three types: "Type M" measuring about 5 x 6 x 3 cm and designed for use with digital cameras and the like; "Type S" measuring about 3 x 4 x 2 cm to be used with small size portable devices; and "Type L," a flat and slightly large fuel cell targeted for portable printers and so forth. Type S comes with a fuel cartridge integrated with a power generation unit.
The digital cameras used in the demonstration employed Type M fuel cells. The fuel cell was mounted on the battery grip of a digital SLR camera, and on the grip portion of a compact camera.
At academic conferences held in November 2004, Canon introduced a series of studies on elemental technologies required to constitute a fuel cell using hydrogen as a fuel. These technologies have been partially improved to be incorporated into the prototype fuel cells on display.
Motonobu Kawai, Nikkei Electronics