04193025 is referenced by 178 patents and cites 6 patents.

Apparatus for automatically testing automotive-type, lead acid storage batteries are disclosed in which three separate tests are made and the results thereof compared to predetermined standards in a specified order to maximize the information obtained about the battery. The three tests measure (1) whether the battery meets its cold cranking rating by drawing a predetermined load current therefrom for a predetermined period of time and determining whether the battery terminal voltage is above a specified level at the end of that period, (2) whether the battery terminal voltage is above another specified level at the end of a predetermined period of time following the completion of the first test, and (3) whether the internal resistance is acceptably low. If the battery passes the first test, it is known to be acceptable. If the battery fails the first test and passes the second test, it is known to be unacceptable. If the battery fails the first and second tests, the third test is performed. If the battery then passes the third test, it is known to be acceptable but to require a recharge, whereas if the battery then fails the third test the acceptability of the battery is then not yet determined and it must be recharged and retested.

Title
Automatic battery analyzer
Application Number
5/863925
Publication Number
4193025
Application Date
December 23, 1977
Publication Date
March 11, 1980
Inventor
Thomas J Dougherty
Waukesha
WI, US
Charles E Frailing
Milwaukee
WI, US
Agent
Neuman Williams Anderson & Olson
Assignee
Globe Union
WI, US
IPC
G01N 27/42
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