초록 ▼

A feedthrough pin insulator and corresponding assembly for an electrochemical cell powering an implantable medical device are described herein. The feedthrough pin insulator electrically insulates a feedthrough pin extending between the internal and external portions of the cell from cell components

A feedthrough pin insulator and corresponding assembly for an electrochemical cell powering an implantable medical device are described herein. The feedthrough pin insulator electrically insulates a feedthrough pin extending between the internal and external portions of the cell from cell components having the same electrical potential as a cathode disposed within the cell. The feedthrough pin insulator extends between an anode disposed within the cell and a ferrule disposed in an aperture of a cover for sealing the cell. A gate or dam is disposed at one end of the insulator for preventing or inhibiting the formation of anode flash on the feedthrough pin or in other undesired locations or on certain cell components during the anode formation process. A method of forming an anode is also described which corresponds to the foregoing apparatus.

대표청구항 ▼

[ We claim:] [1.] An electrochemical cell comprising:(a) a metal housing having an open end;(b) an anode having an anode current collector disposed operatively in respect thereof;(c) a cathode having a cathode current collector disposed operatively in respect thereof, the cathode being disposed oper

[ We claim:] [1.] An electrochemical cell comprising:(a) a metal housing having an open end;(b) an anode having an anode current collector disposed operatively in respect thereof;(c) a cathode having a cathode current collector disposed operatively in respect thereof, the cathode being disposed operatively in respect of the anode, the anode and cathode being disposed within the housing;(d) a header assembly for sealing the open end, comprising:(1) a feedthrough pin having upper and lower ends, the lower end being connected electrically to the anode current collector;(2) a housing cover having external and internal surfaces, the upper end of the feedthrough pin extending through an aperture disposed in the cover, the lower end of the pin being disposed inside the housing and electrically connected to the anode;(3) an electrically insulative seal disposed between the pin and the cover;(4) a feedthrough pin insulator having first and second portions, the first portion being disposed at a location at or near the internal surface of the cover, the second portion being disposed at a location at or near the anode, the feedthrough pin insulator extending from locations near or at the anode and the internal surface of the cover, at least portions of the feedthrough pin engaging or being enclosed within the feedthrough pin insulator, the feedthrough pin insulator electrically insulating the feedthrough pin from the cover and other cell components having the same electrical potential as the cathode, the feedthrough pin insulator having a gate attached to or forming part of the second portion, the gate having a sealing surface for preventing or inhibiting anode material from being extruded or pushed therearound when the sealing surface is pushed against a sidewall of an anode formation cavity during an anode formation process.