Sanyo Electric Co., Ltd.

Takanao Matsumoto

Nobuhiro Furukawa

Masaru Yamano

Toshiharu Kokuga

Akira Watanabe

Takashi Sakai

Shuzo Murakami

Yoshikazu Ishikura

Mitsunori Takao

Hiroaki Sakurai

A battery charging circuit performs rapid charging without over-charging followed by supplementary charging to insure a fully charged rechargeable battery. The amount of supplementary charging is increased at low ambient temperatures and decreased at high temperatures. A primary charging circuit means for rapid charging and a supplementary charging circuit means for supplementary charging are provided. A temperature sensing means measures ambient temperature during rapid charging to establish the amount of supplementary charging required.

Rechargeable battery charging circuit which sets supplemental charging

The present invention is directed to a metal/hydrogen alkaline storage battery, which comprises a positive electrode of a metal oxide, a negative electrode of a hydrogen-storage alloy, and a separator impregnated with an alkaline electrolyte and placed between the positive and negative electrodes. The electrodes and separator are housed within a sealed type battery casing. The casing has a device for maintaining the pressure in the battery in a selected range of from an equilibrium pressure required for absorbing hydrogen by the negative electrode to about 20 kg/cm.sup.2.

Metal/hydrogen alkaline storage battery

The present invention discloses a preservation device for lead storage battery comprising: a lead storage battery including at least one negative plate, at least one positive plate, at least one separator between said negative and positive plates, an electrolyte holdingly impregnated by said negative & positive plates and said separator and limited in amount such that substantially there is no electrolyte liberated from said negative & positive plates and said separator, and external terminals having one ends respectively connected to said negative and positive plates and the other ends exposed to the outside of the lead storage battery vessel; and an impedance means connected between said external terminals of said lead storage battery during its preservation. Such preservation device permits to prevent a battery preserved in such device from being decreased in capacity without requiring troublesome maintenance such as supplementary charging at regular intervals, even if it is preserved for a long period of time.

Preservation device for lead storage battery

Growing community of inventors

Nishinomiya, Japan

Takanao Matsumoto