Protecting device and battery pack

A protecting device comprising:

• a fuse element and a blowing member for blowing the fuse element, wherein
• the blowing member comprises:
• an insulating substrate;
• a heat generator formed on the front surface of the insulating substrate;
• an insulating layer covering the heat generator;
• a heat-generator lead-out electrode connected to the heat generator and superimposed with the heat generator via the insulating layer;
• a heat-dissipating portion formed on the front surface of the insulating substrate, at least in an area superimposed with the heat generator, and electrically independent from the heat-generator lead-out electrode;
• a holding electrode formed on the back surface of the insulating substrate that is the reverse side of the front surface to hold the melted conductor of the fuse element when the fuse element is blown;
• and
• a through-hole connecting the heat-generator lead-out electrode and the holding electrode, wherein
• the fuse element is connected to the heat-generator lead-out electrode.

A protecting device comprising:

• a fuse element and a blowing member for blowing the fuse element, wherein
• the blowing member comprises:
• an insulating substrate;
• a heat generator formed on the front surface of the insulating substrate;
• an insulating layer covering the heat generator;
• a heat-generator lead-out electrode connected to the heat generator and superimposed with the heat generator via the insulating layer;
• a heat-dissipating portion formed on the front surface of the insulating substrate, at least in an area superimposed with the heat generator, and electrically independent from the heat-generator lead-out electrode;
• and
• a first electrode and a second electrode formed on the front surface of the insulating substrate and connected to an external circuit, wherein
• the fuse element is connected to the first electrode, the second electrode, and the heat-generator lead-out electrode provided between the first and second electrodes.

A protecting device comprising:

• a fuse element and a blowing member for blowing the fuse element, wherein
• the blowing member comprises:
• an insulating substrate;
• a heat generator formed on the front surface of the insulating substrate;
• an insulating layer covering the heat generator;
• a heat-generator lead-out electrode superimposed with the heat generator on the back surface of the insulating substrate and connected to the heat generator;
• a heat-dissipating portion formed on the back surface of the insulating substrate at least in an area superimposed with the heat generator, and electrically independent from the heat-generator lead-out electrode;
• and
• a first electrode and a second electrode formed on the back surface of the insulating substrate and connected to an external circuit, wherein
• the fuse element is connected to the first electrode, the second electrode, and the heat-generator lead-out electrode.

A protecting device comprising:

• a fuse element and a blowing member for blowing the fuse element, wherein
• the blowing member comprises:
• an insulating substrate;
• a plurality of heat generators provided in parallel on the front surface of the insulating substrate;
• an insulating layer covering the heat generators;
• a heat-generator lead-out electrode connected to the heat generators and superimposed with the heat generators via the insulating layer;
• a heat-dissipating portion formed on the front surface of the insulating substrate, at least in an area superimposed with the heat generators, and electrically independent from the heat-generator lead-out electrode;
• a first electrode and a second electrode formed on the back surface of the insulating substrate and connected to an external circuit;
• a holding electrode provided between the first and second electrodes on the back surface of the insulating substrate;
• a through-hole penetrating the area between the plurality of heat generators of the insulating substrate and connecting the heat-generator lead-out electrode and the holding electrode, wherein
• the fuse element is connected to the first electrode, the second electrode, and the holding electrode.