Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Masatoshi Izaki

Kenji Senda

Takeshi Ishimaru

Katsumi Kozu

Takahiro Mukai

Kenzo Isozaki

Shinichi Ohtsuka

Yoshio Sakamoto

A fuse has a pair of lead terminals disposed on a substrate, an intermediate layers for welding formed on the surface of at least one of the lead terminals, and a fuse element. The fuse element is welded to the pair of lead terminals through the intermediate layer so as to span the same. Further, the intermediate layer is formed on at least one of the lead terminals except a face thereof opposing each other. Owing to this configuration, after the fuse has melted down, the melted fuse element is prevented from being spread out into the space between the opposing faces of the lead terminals and insulation therebetween is secured.

Fuse, battery pack using the fuse, and method of manufacturing the fuse

Fuse

A thermal fuse reduced in size and thickness can be obtained. Further, the thermal fuse will not be degraded in characteristics, productivity, reliability, quality, etc. even after reduction in size and thickness. The thermal fuse includes a fuse main body including a substrate, a fusible metal and a cover, and paired terminals disposed protruding from the fuse main body. The other end of the first terminal has a first fusible metal connection, and the other end of the second terminal has a second fusible metal connection. The fusible metal is disposed between the first terminal and the second terminal, and one end of the fusible metal is connected to the first fusible metal connection, and the other end of the fusible metal is connected to the second fusible metal connection. The cover is disposed so as to cover the fusible metal, the first fusible metal connection, and the second fusible metal connection. Length L and thickness L of the fuse main body located between the first terminal and the second terminal are respectively in the ranges of 2.0 mm<L <8.5 mm and 0.4 mm<L <2.5 mm.

Thermal fuse, battery pack, and method of manufacturing thermal fuse

Growing community of inventors

Miyazaki, Japan

Masatoshi Izaki