Shin-kobe Electric Machinery Co., Ltd.

Nec Corporation

Hitachi Chemical Company, Ltd.

Yoshifumi Yamada

Kenichi Maeda

Naoki Tsuji

Hiroki Tsuji

Masatoshi Miyatsuka

Kazuya Sasaki

Keizo Yamada

Seiichi Hiratsuka

Yoshiaki Machiyama

Takashi Hara

Teruhito Amanai

Provided herein is a lead-acid battery for which the risk of breakage of a current collecting lug part of a plate while in use is eliminated by simple means. At least a positive plate group of the lead-acid battery includes: one or more plates each including a current collector having a current collecting portion formed by expanding or punching a lead alloy sheet manufactured by cold rolling, and one or more current collecting lug parts unitarily formed with the current collecting portion; and a strap formed by a cast-on strap casting method and coupled to the one or more current collecting lug parts. The current collecting lug part is formed with an elongated protrusion extending in a direction away from the current collecting portion. The elongated protrusion continuously extends in a direction toward the current collecting portion of the plate from inside the strap.

Method for manufacturing lead-acid battery

Lead-acid battery and method for manufacturing current collector for lead-acid battery

A battery state determining apparatus is provided which can accurately determine a state of a lead battery in an automotive vehicle. The apparatus calculates a corrected engine starting voltage Vstfrom an open-circuit voltage (OCV) measuring section that measures the open circuit voltage Vst of the lead battery at an engine starting time in accordance with a temperature of the vehicle. The apparatus further calculates a battery determination voltage Vst_th representing a voltage of the lead battery at an engine starting time when a growth rate of internal resistance of the lead battery reaches a predetermined value from the open-circuit voltage OCV. The apparatus then determines the battery state of the lead battery by determining whether the corrected engine starting voltage Vstis larger than the battery determination voltage Vst_th and whether the corrected engine starting voltage Vstbelongs to a predetermined region on a characteristic map.

Battery state determining apparatus

There is disclosed a method of registering palm imprints of individuals to be identified to authenticate the individuals. Each palm imprint is divided into parts having regions with predetermined positions and sizes. Feature points are extracted from the parts of the imprint. The obtained feature information is registered as information for identity of individuals.

Method and device for registering and collating palm imprints

Growing community of inventors

Saitama, Japan

Yoshifumi Yamada