Mismatched compression glass-to-metal seal
AssigneeWilson Greatbatch Ltd.
InventorsChristine A. Frysz, Harvey A. Hornung II, Joseph M. Prinzbach
Life of this patent
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Abstract
A reverse mismatched compression glass-to-metal seal is described. In this seal, the coefficient of thermal expansion of the insulating glass is lower than that of the terminal lead and, the ferrule or casing body has a similar or higher coefficient of thermal expansion than that of the terminal lead.
Claims36
An electrochemical cell comprising an anode electrode and a cathode electrode housed inside a casing and activated with an electrolyte, wherein one of the anode electrode and the cathode electrode is connected to a terminal lead insulated from the casing by a glass-to-metal seal, the improvement is the glass-to-metal seal comprising:
- the glass-to-metal seal having an insulating glass extending between and sealed to a support portion of the casing and the terminal lead, wherein the insulating glass has a first coefficient of thermal expansion which is less than a second coefficient of thermal expansion of the terminal lead and wherein the second coefficient of thermal expansion is less than or substantially similar to a third coefficient of thermal expansion of the casing support portion.
A glass-to-metal seal, which comprises:
- a) an insulating glass;
- b) a terminal lead;
- and
- c) a support, wherein the insulating glass extends between and seals to the terminal lead and the support surrounding the insulating glass, and wherein the insulating glass has a first coefficient of thermal expansion which is less than a second coefficient of thermal expansion of the terminal lead and wherein the second coefficient of thermal expansion is less than or substantially similar to a third coefficient of thermal expansion of the support.
A method for providing an electrochemical cell comprising the steps of:
- a) providing an anode electrode and a cathode electrode in electrical association with each other housed inside a casing and activated with an electrolyte;
- b) connecting one of the anode electrode and the cathode electrode to a terminal lead;
- c) connecting the other of the anode electrode and the cathode electrode to the casing;
- d) electrically segregating the terminal lead from the casing by the provision of an insulating glass extending between and sealing to the casing and the terminal lead, wherein the insulating glass has a first coefficient of thermal expansion which is less than a second coefficient of thermal expansion of the terminal lead and wherein the second coefficient of thermal expansion is less than or substantially similar to a third coefficient of thermal expansion of the casing.
Dependencies are inferred from the claim text.