Sanyo Electric Co., Ltd.

Hisashi Hashimoto

Mikitaka Tamai

Kazuo Osaki

Takashi Namura

The method of fuse manufacture has a step to fabricate a metal plate with an overall long narrow shape, with a plurality of rows of connecting pieces having separated tips and connected aft ends, and with the tip of each connecting piece arranged in a straight line; a step to connect the tips of adjacent connecting pieces by welding wire to the connecting piece tip regions which are arranged in a straight line; a step to treat two adjacent connecting pieces as a unit, to cut the wire between each two-connecting piece unit for separation, and to detach each individual connecting piece; and a step to bend the wire, connecting each cut two-connecting piece unit, to form the pair of connecting pieces into a straight line.

Method of fuse manufacture and a battery pack containing that fuse

A fuse is melted and cut off when an overcurrent flows through the fuse. The fuse has a different thermal expansion coefficient metal laminate obtained by laminating a plurality of different thermal expansion coefficient metal plates. When the fuse is melted and cut off by heat of the overcurrent, a mechanical deforming force is applied to a melting portion of the fuse. The mechanical force is caused by the difference between thermal expansion coefficients of the different thermal expansion coefficient metal plates.

Fuse and battery pack containing the fuse

Battery

Connection between internal batteries and external terminals of the battery pack is controlled by semiconductor switching devices, rather than by switches with mechanical contacts. When the battery pack Is not connected, battery short circuits are prevented by non-conduction of the switching devices. When the battery pack is attached to electrical equipment, a control circuit turns the switching devices on to supply power to the equipment. If the electrical equipment is a battery charger, the switching devices are turned on to supply power to the battery pack.

Battery pack with short circuit protection

A battery device for use as a power source for portable electric or electronic appliances. The battery device includes a case (28) which defines a closed space and which is made of hardly flammable and shock-resistant synthetic resin, and secondary batteries (35, 37) and a breaker (45) are disposed in the case. The breaker is connected to the electrodes of the secondary batteries and placed in a charge-discharge circuit including electrically conductive lines and detects the current in the charge-discharge circuit and the environmental temperature in the case, the arrangement being such that when the current or the environmental temperature exceeds a predetermined value, it cuts off the charge-discharge circuit and when the current or the environmental temperature falls below the predetermined value, it is automatically restored to its original state.

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Sumoto, Japan

Hisashi Hashimoto