Abstract: [PROBLEM] In space-conservative fashion, at low cost, and with high efficiency, to carry out absorption of gas produced at the interior of a battery. [SOLUTION MEANS] Secondary battery 21 is provided with case 3 in which positive electrode 10 and negative electrode 11 are sealed together with electrolyte, and with explosion prevention valve 4 for allowing escape of high-pressure gas present at the interior of case 3 when pressure within case 3 rises; and is further provided with gas absorber 13 or 14 for absorbing high-pressure gas. Gas absorber 13, includes gas-absorbent material 6 and capsule 5, which comprises hot-melt material, and is provided within case 3, this capsule 5 including, at the interior thereof, gas-absorbent material 6.

Abstract: [PROBLEM] In space-conservative fashion, at low cost, and with high efficiency, to carry out absorption of gas produced at the interior of a battery. [SOLUTION MEANS] Secondary battery 21 is provided with case 3 in which positive electrode 10 and negative electrode 11 are sealed together with electrolyte, and with explosion prevention valve 4 for allowing escape of high-pressure gas present at the interior of case 3 when pressure within case 3 rises; and is further provided with gas absorber 13 or 14 for absorbing high-pressure gas. Gas absorber 13, includes gas-absorbent material 6 and capsule 5, which comprises hot-melt material, and is provided within case 3, this capsule 5 including, at the interior thereof, gas-absorbent material 6.

Abstract: A fuel cell comprises a fuel electrode, an electrolyte membrane and an air electrode 4. The fuel electrode and the air electrode 4 are electrically connected by way of an electric circuit L. A solid-state methanol storage container serving as a fuel container is disposed in the vicinity of the fuel cell on the side of the fuel electrode. The storage container comprises a rectangular box-like casing, the interior of which is packed with solid-state methanol. An opening serving as an air-permeable portion is formed on the lower face side of the storage container. By dividing the opening by a synthetic resin mesh, which is a permeable material, the solid-state methanol is held with secured air permeability. The resulting direct methanol fuel cell system uses extremely safe solid-state methanol in a fuel cartridge.

Abstract: A direct methanol fuel cell system comprises a fuel storage portion that stores solid-state methanol resulting from making methanol into a solid state, a fuel cell, and carrier gas circulation means. The fuel storage portion is provided with a carrier gas supply path communicating with the carrier gas circulation means and a fuel gas flow path 4 communicating with a fuel electrode side of the fuel cell, while the fuel cell is provided with a circulation flow path communicating with the carrier gas circulation means. When a carrier gas is supplied by the carrier gas circulation means into the fuel storage portion via the carrier gas supply path, a fuel gas is supplied to a fuel electrode and is refluxed thereafter towards the carrier gas circulation means. The resulting direct methanol fuel cell system uses extremely safe solid-state methanol in a fuel cartridge.

Abstract: A cleaning process which comprises contacting a printed circuit board to which a residue of a flux is attached with a cleaning composition containing a first solvent and an organic compound, and then with a second solvent. The first solvent is an aliphatic hydrocarbon solvent having 5 to 20 carbon atoms. The organic compound is a 1-alkyl-2-pyrrolidone having 3 to 18 carbon atoms, a tri-alkylphosphine oxide having 3 to 8 carbon atoms or a di-alkylsulfoxide having 3 to 8 carbon atoms. The organic compound is in an amount of 10 to 300 g per liter of the hydrocarbon solvent. The cleaning composition does not contain a halogen compound.