Sanyo Electric Co., Ltd.

Panasonic Corporation

Toshihiro Sakatani

Makoto Ochi

Hiromasa Sugii

Takumi Yamaguchi

Yohsuke Mitani

Masao Takee

Kazuki Morita

Yasuyuki Harada

Ryuuji Kawase

Kei Ikoma

A hybrid power source connects a secondary battery and an EDLC. A first switch connects the hybrid power source and a lead acid battery in parallel. A power source controlling portion controls power supply to the hybrid power source and the lead acid battery. The hybrid power source is connected to a starter for starting an engine for a vehicle, and also connected to an electric device except for the starter through the first switch, and the lead acid battery is connected to the electric device, and also connected to the starter through the first switch.

Power source system for a vehicle

In a battery system for a vehicle, a lead battery is connected in parallel to a sub-battery, and a charging resistance rof the sub-batteryis lower than a charging resistance rof the lead battery.

Vehicular battery system and vehicle equipped with same

A negative electrode plate of a nickel hydrogen storage battery includes a nonaqueous polymer binder and has an effective surface area per unit capacity of 70 cm/Ah or more. The density of the first and second separators between positive and negative electrode plates ranges from 450 kg/mto 600 kg/m. The nonwoven fabrics of the separators are formed by combining microfibers and compound fibers through melting portions of the compound fibers. The fibers have a virtually circular cross-section. The microfibers and the compound fibers have a diameter ranging from 1 &#x3bc;m to less than 5 &#x3bc;m and a diameter ranging from 5 &#x3bc;m to 15 &#x3bc;m, respectively. The proportion of the microfibers to whole fibers ranges from 10 percent by mass to 20 percent by mass. At least one of the nonwoven fabrics of the separators is subjected to sulfonation treatment.

Nickel hydrogen storage battery

Growing community of inventors

Aichi, Japan

Toshihiro Sakatani