Battery electrode hardness tester

Details Battery electrode hardness tester Battery electrode hardness tester

1981-01-22

1983-04-26

Goldstein, Herbert

Measuring and testing

Hardness

By penetrator or indentor

G01N 344

Patent

active

043809260

ABSTRACT:
A unique electrode plaque hardness 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.

REFERENCES:
patent: 2022040 (1935-11-01), James
patent: 2030855 (1936-02-01), Canfield
patent: 2039563 (1936-05-01), Simonds
patent: 2182235 (1939-12-01), Polushkin
patent: 2226600 (1940-12-01), Eddington
patent: 2938377 (1960-05-01), Sklar
patent: 2975630 (1961-03-01), Michel
patent: 3221535 (1965-12-01), Ohishi
patent: 3513691 (1970-05-01), Aston et al.
patent: 3590630 (1971-07-01), Ericksson
patent: 3899931 (1975-08-01), Iwasaki
patent: 4182164 (1980-01-01), Fohey

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