Non-aqueous electrolytic solution battery

Abstract

Abstract PURPOSE:To prevent the heating and explosion in case of a short-circuit without injuring the battery performance, by bonding previously pulverized polyethylene powder onto the separator of the captioned battery which uses non-aqueous electrolytic solution. CONSTITUTION:A separator is made of non-woven polypropylene cloth or non- woven polypropylene cloth mixed with glass fiber. About 5-40% of pulverized polypropylene powder is previously bonded onto the separator. When short-circuit occurs across both electrodes in this battery, the inside of this battery is heated by the short-circuit current. When the inside temperature the battery reaches about 110-120 deg.C, the pulverized polypropylene powder bonded onto the separator is melted and the conductivity of the separator is injured. Consequently, the internal resistance of the battery suddenly increases and the short-circuit current thereof suddenly decreases. Also, the battery temperature is lowered in proportion to the decrease of the short-circuit current and the possibility of explosion is eliminated.

Inventors

• 👤 Kohei Yamamoto
• 👤 浩平 山本
• 👤 Toshio Mizuno
• 👤 水野　利男
• 👤 Yasuhiro Ishiguro
• 👤 康裕 石黒
• 👤 Masanori Nakanishi
• 👤 正典 中西

Bibliographic Details