US 12,283,723 B2
Protecting device and battery pack
Yuji Kimura, Tochigi (JP); and Chisato Komori, Tochigi (JP)
Assigned to DEXERIALS CORPORATION, Tochigi (JP)
Appl. No. 17/602,629
Filed by DEXERIALS CORPORATION, Tochigi (JP)
PCT Filed Mar. 25, 2020, PCT No. PCT/JP2020/013405
§ 371(c)(1), (2) Date Oct. 8, 2021,
PCT Pub. No. WO2020/209071, PCT Pub. Date Oct. 15, 2020.
Claims priority of application No. 2019-074956 (JP), filed on Apr. 10, 2019.
Prior Publication US 2022/0200111 A1, Jun. 23, 2022
Int. Cl. H01M 50/581 (2021.01); H01H 85/055 (2006.01); H01H 85/20 (2006.01); H01M 10/48 (2006.01); H01M 50/249 (2021.01); H01M 50/284 (2021.01); H02H 3/20 (2006.01); H02H 7/18 (2006.01)
CPC H01M 50/581 (2021.01) [H01H 85/055 (2013.01); H01H 85/20 (2013.01); H01M 10/48 (2013.01); H01M 10/482 (2013.01); H01M 50/284 (2021.01); H02H 3/20 (2013.01); H02H 7/18 (2013.01); H01M 50/249 (2021.01); H01M 2200/103 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A protecting device, comprising:
an insulating substrate;
a fuse element provided at one side of the insulating substrate;
a heat-generator formed on the insulating substrate to blow the fuse element by heat generation;
a heat-generator feeding electrode connected to one end of the heat-generator and serving as a power-feeding terminal for the heat-generator;
an insulating layer that covers the heat-generator; and
a heat-generator lead-out electrode connected to the other end of the heat-generator, formed along the heat-generator on the insulating layer to hold melted conductor of the fuse element,
wherein, when the heat-generator is energized via the heat-generator feeding electrode, the heat-generator feeding electrode side thereof works as a high potential portion and the heat-generator lead-out electrode side thereof works as a low potential portion, and
wherein, in the heat-generator lead-out electrode, an overlapping area in which a distal end portion extending in the high potential portion side of the heat-generator overlaps the heat-generator is smaller than an overlapping area in which a proximal end portion extending in the low potential portion side of the heat-generator overlaps the heat-generator, and
wherein the fuse element is mounted on the heat-generator lead-out electrode, and
wherein the distal end portion of the heat-generator lead-out electrode does not protrude from the side edge of the fuse element toward the heat-generator feeding electrode.