Battery Electrode Hardness Tester.
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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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.
- Electrical and Electronic Equipment
- Electrochemical Energy Storage
- Test Facilities, Equipment and Methods