Kurita Water Industries Ltd.

Gs Yuasa International Ltd.

Hiroshi Obuse

Minoru Yagi

Tokuo Inamasu

Yoshinobu Yasunaga

Tsutomu Watanabe

Ryoichi Okuyama

Yohei Shibata

Shinichi Wada

[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 batteryis provided with casein which positive electrodeand negative electrodeare sealed together with electrolyte, and with explosion prevention valvefor allowing escape of high-pressure gas present at the interior of casewhen pressure within caserises; and is further provided with gas absorberorfor absorbing high-pressure gas. Gas absorber, includes gas-absorbent materialand capsule, which comprises hot-melt material, and is provided within case, this capsuleincluding, at the interior thereof, gas-absorbent material. Furthermore, gas absorber, which may be provided outside case, may include gas-absorbent material; cartridge casewhich houses, at the interior thereof, gas-absorbent material; gas inlet valvefor causing high-pressure gas to flow thereinto; and gas outlet valvefor causing high-pressure gas to flow out therefrom.

Battery comprising gas absorbent material and battery system

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.

Cleaning process

Growing community of inventors

Tokyo, Japan

Hiroshi Obuse