Patent ID: 8048557

Claim:
An electrochemical device, comprising: a header comprising a pin, wherein the pin comprises a terminal end and an electrode end, and wherein the terminal end comprises a first device terminal; a device case comprising a header end and a base end, wherein the header end is adjacent to the header, wherein the device case and the header define an electrode space, and wherein the electrode end of the pin extends into the electrode space; a first electrode disposed within the electrode space adjacent the electrode end of the pin; a separator disposed between the first electrode and a second electrode; an electrode pressure plate disposed adjacent the second electrode; an electrolyte permeating the separator; a device base adjacent the base end of the device case, wherein the device base comprises a spring retaining surface and an electrolyte fill hole; a pressure maintaining spring comprising a base end and a pressure plate end, wherein the base end is adjacent to the spring retaining surface of the device base, wherein the pressure plate end is adjacent to the electrode pressure plate; and a sealing ball disposed within the electrolyte fill hole of the device base, wherein the sealing ball and the device base define a second device terminal.