Method and apparatus for monitoring and indicating the condition of a battery and the related circuitry
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United States of America Patent
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-
May 12, 1987
Grant Date -
N/A
app pub date -
Sep 15, 1980
filing date -
Sep 15, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for testing the battery and the related circuitry of an internal combustion automobile every time the vehicle is started. The test is automatic and the results are available for visual interpretation at the discretion of the operator. The cranking motor furnishes the load for the battery and an electronic apparatus automatically measures the condition of the battery every time the engine is started. The battery tester compares the unloaded voltage of the battery with the voltage under load. If the difference is larger than a preset value, or if the voltage drops below a fixed level, an indicator on the dashboard of the vehicle shows that the battery is low in charge, or it is in a faulty condition, or because of faulty conductors its power is not being delivered to the engine.
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