Sanyo Electric Co., Ltd.

Naohiro Shigeta

Masaki Yugo

Shoichi Toya

Hideo Shimizu

Tetsu Miyamoto

In the present battery apparatus for a vehicle, a temperature detecting plateis fixed outside a casingaccommodating a plurality of secondary batteries. The casingis provided with ventilation holesfor cooling the secondary batteriesbetween the secondary batteriesand the temperature detecting plate. The temperature detecting platefixes temperature sensorson an insulation substrate. The insulation substratehas air holescommunicated with the ventilation holesof the casing, and a communicating portionis provided between the air holes. The temperature sensoris fixed to the communicating portion, and thereby the temperature sensoris located so as to have access to a surface of the secondary batteryvia the ventilation hole

Battery apparatus for vehicle

A power supply is provided with a plurality of secondary batteries, a voltage detection circuit for detecting voltages of the respective secondary batteries or voltages of a plurality of battery modules each of which is a series connection of secondary batteries, and temperature sensors for detecting temperatures of secondary batteries. Each of the temperature sensors has a temperature characteristic that its electric resistance is small when the temperature of an associated secondary battery is low and increases as the temperature of the associated secondary battery increases past a setting temperature. The voltage detection circuit detects the voltages of the respective secondary batteries or the voltages of the respective battery modules as well as battery temperatures by using the temperature sensors as parts of lead wires for detection of the voltages.

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Kasai, Japan

Naohiro Shigeta