Patent ID: 9502186
Filing Date: 2016-11-22
CPC Classification: H01G,H01M,Y02E

Claim Text:
1. An electrochemical cell comprising: a hollow container having a bottom portion, wherein the bottom portion is provided with via holes; a plurality of via wires each provided in one of the via holes, wherein each via wire has an end surface that faces an interior of the hollow container, and wherein the via wires are made of tungsten or molybdenum; an outer terminal formed on an outer bottom surface of the hollow container; a seal ring bonded to an open portion of the hollow container; a lid joined to the seal ring, wherein the open portion of the hollow container is closed by the lid; a protective film provided on an inner bottom surface of the hollow container, wherein the protective film entirely covers all the end surfaces of the via wires together with portions of the inner bottom surface each of which is a periphery of one of the via wires; and a pair of electrodes and an electrolyte, wherein the hollow container, the seal ring, and the lid define a space for accommodating the pair of electrodes and the electrolyte, wherein the hollow container is made of ceramic, wherein the seal ring and the lid are made of metal, wherein the electrolyte is in the form of a liquid or a gel, wherein the protective film is made of a material different from that of the via wires and having greater corrosion resistance than that of the via wires when coming into contact with the electrolyte, wherein the end surface of each via wire is electrically connected to one of the pair of electrodes through the protective film, and wherein the bottom portion of the hollow container includes interlayer wires formed therein, and wherein the via wires are connected to the interlayer wires and are electrically connected to the outer terminal through the interlayer wires.