George J Burke

US Patent:

53277848, Jul 12, 1994

Filed:

Jul 9, 1992

Appl. No.:

7/910956

Inventors:

Srinivasan Venkatesan - Southfield MI
George Burke - Detroit MI
Ken Laming - Columbus MI
Subhash Dhar - Rochester MI

Assignee:

Ovonic Battery Company, Inc. - Troy MI

International Classification:

G01L 700

US Classification:

73714

Abstract:

An apparatus for accurately measuring pressure within a rechargeable cell, the apparatus comprising: a frame, the frame including at least one cavity adapted to releasably seat a rechargeable cell; a fixed brace defining a first end of the at least one cavity; a movable brace defining the end of the at least one cavity opposite from the fixed brace, the movable brace including a hollow needle, the hollow needle having a pointed end which is operatively directed toward one end of a rechargeable cell disposed in the cavity, and means for sealing a point where the hollow needle is inserted into a rechargeable cell; a pressure transducer operatively connected with the hollow needle; and means for controllably moving the movable brace relative to the fixed brace, whereby the hollow needle is adapted for insertion into and removal from a rechargeable cell disposed in the cavity.