Battery device

Abstract

Provided is a battery device usable even if a part of batteries abnormally generates heat, and facilitating improvement of safety measures. This battery device is composed by serially connecting a plurality of the batteries (1). Each battery(1) is equipped with a thermally-actuated switch (2)for cutting off the current carried to the battery (1) to change a preliminary path to a conductive path; a conductor plate (11) connected to a first terminal (7b) of the switch (2); a conductor plate(12) connected to a common terminal (6b) of the switch; and a conductor plate (13) connected to a second terminal (8b) of the switch and usable as the preliminary path. The switch normally brings a moving contact member (10) into contact with a first fixed contact to electrically connect the conductor plates (12) and (11) to each other, and electrically connects the conductor plates (12) and (13) to each other because a bimetal piece is inverted to bring the contact member into contact with a second fixed contact when the battery abnormally generates heat.

Description

technical field [0001] The present invention relates to a battery pack device such as a battery pack in which a plurality of batteries are connected in series, and more particularly to a battery pack device in which failure is considered to be avoided even if the battery generates abnormal heat. Background technique [0002] Conventionally, in such a battery pack device, it is known to provide a thermal switch as a safety measure when the battery generates abnormal heat. That is, because if the current continues to flow in the abnormally hot battery, the risk of leakage or explosion will be increased, so a thermal switch is installed between the batteries connected in series in advance, and the temperature in the battery pack reaches When it is judged to be abnormally high temperature, the thermal switch is switched from on state to off state, and power supply to each battery is cut off. [0003] Here, the thermal switch has a thermal element such as a bimetal made by joini...

AI Technical Summary

Problems solved by technology

That is, even if only one battery fails and all the remaining batteries are normal, the main body of the device that uses this battery pack as a power source cannot be used, so there is a problem that it is inconvenient to use

In addition, since the temperature does not drop rapidly even if the power supply to the abnormally hot battery is turned off, it is sometimes necessary to activate a cooling fan or an alarm for safety reasons. There is no structure for outputting a command signal from a thermal switch to an external circuit such as a circuit with a protective function, so there is a problem that the mechanism for improving safety measures when the battery heats up abnormally is easy to complicate.

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