Electrochemical cell
View Patent ↗An electrochemical cell has an outer case formed of one of ceramics and glass. An electrochemical cell element is hermetically sealed in the outer case. The electrochemical cell element contains a positive pole, a negative pole, and a non-aqueous electrolyte containing an organic solvent. A metal layer is formed on an edge of the outer case. A sealing plate is resistance welded to the metal layer. The sealing plate is made of an alloy containing, in weight percentage, Co by 1 to 50%, Ni by 1 to 70%, Fe by 20% or higher, Cr by 10% or lower, Mn by 2.0% or lower, Si by 1.0% or lower and C by 1.0% or lower.
1. An electrochemical cell comprising:
an outer case formed of one of ceramics and glass;
an electrochemical cell element hermetically sealed in the outer case, the electrochemical cell element containing a positive pole, a negative pole, and a non-aqueous electrolyte containing an organic solvent;
a metal layer formed on an edge of the outer case; and
a sealing plate resistance welded to the metal layer, the sealing plate being made of an alloy containing, in weight percentage, Co by 1 to 50%, Ni by 1 to 70%, Fe by 20% or higher, Cr by 10% or lower, Mn by 2.0% or lower, Si by 1.0% or lower and C by 1.0% or lower.
2. An electrochemical cell according to claim 1 ; wherein the metal layer is made from one of Au and Ni.
3. An electrochemical cell according to claim 1 ; wherein the sealing plate has a thermal expansion coefficient within a range of −2 to 11×10 −6 /° C. (0-3000° C.).
4. An electrochemical cell according to claim 1 ; further comprising a conductive layer electrically connected with one of the positive pole and the negative pole, and a connecting terminal electrically connected to the conductive layer and formed by patterning on an external surface of the outer case.
5. An electrochemical cell according to claim 1 ; further comprising a first conductive layer formed on an internal bottom surface of the outer case and electrically connected to the positive pole, a second conductive layer formed on the sealing plate and electrically connected to the negative pole, a first connecting terminal formed by patterning on an external surface of the outer case and electrically connected to the first conductive layer, and a second connecting terminal formed by patterning on the external surface of the outer case and electrically connected to the second conductive layer.
6. An electrochemical cell comprising:
an outer case formed of one of ceramics and glass;
an electrochemical cell element hermetically sealed in the outer case, the electrochemical cell element containing a positive pole, a negative pole, and a non-aqueous electrolyte containing an organic solvent;
a metal ring formed on an edge of the outer case;
a metal layer formed on the metal ring; and
a sealing plate resistance welded to the metal layer, the sealing plate being made of an alloy containing, in weight percentage, Co by 1 to 50%, Ni by 1 to 70%, Fe by 20% or higher, Cr by 10% or lower, Mn by 2.0% or lower, Si by 1.0% or lower and C by 1.0% or lower.
7. An electrochemical cell according to claim 6 ; wherein the metal layer is made from one of Au and Ni.
8. An electrochemical cell according to claim 6 ; wherein the sealing plate has a thermal expansion coefficient within a range of −2 to 11×10 −6 /° C. (0-3000° C.).
9. An electrochemical cell according to claim 6 ; further comprising a conductive layer electrically connected with one of the positive pole and the negative pole, and a connecting terminal electrically connected to the conductive layer and formed by patterning on an external surface of the outer case.
10. An electrochemical cell according to claim 6 ; further comprising a first conductive layer formed on an internal bottom surface of the outer case and electrically connected to the positive pole, a second conductive layer formed on the sealing plate and electrically connected to the negative pole, a first connecting terminal formed by patterning on an external surface of the outer case and electrically connected to the first conductive layer, and a second connecting terminal formed by patterning on the external surface of the outer case and electrically connected to the second conductive layer.
11. A method of manufacturing an electrochemical cell, comprising the steps:
disposing a metal layer over an edge of an outer case made of one of ceramics and glass;
disposing a positive pole, a negative pole, and a non-aqueous electrolyte containing an organic solvent in the outer case; and
welding a sealing plate to the metal layer by resistance welding, the sealing plate being made of an alloy containing, in weight percentage, Co by 1 to 50%, Ni by 1 to 70%, Fe by 20% or higher, Cr by 10% or lower, Mn by 2.0% or lower, Si by 1.0% or lower and C by 1.0% or lower.
12. A method according to claim 11 ; further comprising the step of forming a metal ring on the edge of the outer case prior to the step of disposing a metal layer; and wherein the step of disposing a metal layer comprises forming the metal layer on the metal ring.
13. A method according to claim 12 ; wherein the metal layer is made from one of Au and Ni.
14. A method according to claim 11 ; wherein the metal layer is made from one of Au and Ni.