Accession Number : ADD010257

Title :   Battery Electrode Hardness Tester.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Fritts,David H ; Leonard,John F

Report Date : 26 Apr 1983

Pagination or Media Count : 7

Abstract : A unique electrode plaque tester, and a method of testing for the hardness of an electrode plaque specimen, are taught. The hardness tester is of the indentation type, and permits the hardness testing of an electrode plaque that is very thin (e.g., 0.75 mm) and that is made of non-homogenous, sintered material, such as a nickel electrode plaque. A fixed load, comprising a lesser first load and a larger second load, is applied in sequence to a test specimen of the electrode plaque, with two superimposed indentations resulting. The hardness of the electrode plaque, as a result of the use of this tester, is inversely related to the difference in the depths of the two indentations. Data acquired as a result of testing specimens with this hardness tester establishes that the harder the electrode plaque is, the less efficient is the performance of an active battery electrode which includes this electrode plaque.

Descriptors :   *Patents, *Electrodes, *Battery components, *Hardness, *Test equipment, Thinness, Nickel alloys, Sintering, Data acquisition, Efficiency, Inventions

Subject Categories : Electrical and Electronic Equipment
      Electrochemical Energy Storage
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE