Sanyo Electric Co., Ltd.

Panasonic Corporation

Hiromasa Sugii

Makoto Ochi

Kazuhiro Kitaoka

Masao Takee

Yoshinobu Katayama

Toshihiro Sakatani

Takumi Yamaguchi

Yohsuke Mitani

Kazuki Morita

Yasuyuki Harada

Kazunobu Yokotani

Shuhei Yoshida

Fumio Yasutomi

Yoshihiro Masuda

Ryuuji Kawase

Shuuhei Yoshida

Noritake Okada

Atsutoshi Akou

Ryu Yamashita

Yuuji Shinohara

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

A first power storage section and a second power storage section are connected in parallel. The first power storage section includes a first non-aqueous electrolyte secondary battery. The second power storage section includes parallel-connected second non-aqueous electrolyte secondary batteries. Each of the second non-aqueous electrolyte secondary batteries has a higher energy density than that of the first non-aqueous electrolyte secondary battery. In a case where the second power storage section is discharged at a current value corresponding to a first assumed maximum discharge current value, the parallel-connected number of the second non-aqueous electrolyte secondary batteries is set such that a discharge rate of each of the second non-aqueous electrolyte secondary batteries becomes the preset reference discharge rate or less.

Power supply system

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

To provide a hydrogen storage alloy for an alkaline storage battery that improves output power by pulverization of the alloy in the initial stage of partial charge and discharge cycles and that maintains its surface condition to improve the amount of lifetime work (Wh), and an alkaline storage battery and battery system. A hydrogen storage alloy for an alkaline storage battery includes a composition expressed by LaReMgNiAlT(Re: rare earth element(s) including Y; T: Co, Mn, Zn; 0.17&#x2266;x&#x2266;0.64, 3.5&#x2266;n&#x2266;3.8, 0.06&#x2266;m&#x2266;0.22, v&#x2267;0), and a main phase of an ABtype crystal structure. A ratio of X/Y of the concentration ratio X of Al to Ni in a surface layer and the concentration ratio Y of Al to Ni in a bulk layer is 0.36&#x2266;X/Y&#x2266;0.85. An alkaline storage battery includes the hydrogen storage alloy in its negative electrode. An alkaline storage battery system performs partial charge and discharge control.

Hydrogen storage alloy for alkaline storage battery, and alkaline storage battery and alkaline storage battery system each including negative electrode having the alloy

Disclosed is an alkaline storage battery comprising a negative electrode, a positive electrode, a separator and an alkaline electrolyte solution in a package can. The negative electrode contains a hydrogen storage alloy represented by the following general formula: LnMg(NiT)(wherein Ln represents at least one element selected from lanthanoid elements, Ca, Sr, Sc, Y, Ti, Zr and Hf; T represents at least one element selected from V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Al, Ga, Zn, Sn, In, Cu, Si, P and B; and 0&#x3c;x&#x2266;1, 0&#x2266;y&#x2266;0.5 and 2.5&#x2266;z&#x2266;4.5) as a negative electrode active material. In this alkaline storage battery, the hydrogen equilibrium pressure (P) is regulated to satisfy 0.02 MPa&#x2266;P&#x2266;0.11 MPa when the hydrogen amount stored in the hydrogen storage alloy (H/M (atomic ratio)) at 40&#xb0; C. is 0.5.

Alkaline storage battery

A cylindrical secondary battery comprises a current collector assembly that electrically connects the sealing cover with a core of one of the positive electrode plate and the negative electrode plate. The current collector assembly is composed of a combination of a current collector plate having a plate shape that is provided on an upper part of the electrode assembly and a current collector lead including a cylindrical part having opposed top and bottom parts and an axis along a main surface of the current collector plate, the top part is joined to a sealing plate that is a bottom surface of the sealing cover, and the bottom part is joined to the current collector plate The current collector lead further includes at least one rectangular tab part extending from an opening edge of the cylindrical part in a direction of the axis, and electrically connected with the current collector plate.

Cylindrical secondary battery having structure in which electrode assembly is connected with sealing cover via combination of current collector plate and current collector lead

Growing community of inventors

Hyogo, Japan

Hiromasa Sugii