Electricity: measuring and testing – Electrolyte properties – Using a battery testing device
Patent
1994-12-09
1996-10-22
Wieder, Kenneth A.
Electricity: measuring and testing
Electrolyte properties
Using a battery testing device
324427, 340636, 340428, 320 33, 320 48, B60R 2510
Patent
active
055680526
ABSTRACT:
A system (10) and method for monitoring usage of current immediately available from the traction batteries (12) of an electric vehicle includes a means (18) for generating a signal representative of the current being drawn from the batteries (12); a means (20) for generating a signal representative of the maximum current available from the batteries (12) for immediate use; and a means (22) responsive to the drawn-current signal and the maximum-available-current signal for generating a usage signal representing the ratio of drawn current to maximum-available current. A display, such as an analog meter (24) responsive to the usage signal and calibrated from zero-percent to one-hundred-percent available current usage, displays the transitory current usage as a percentage of maximum-available current. Where the batteries (12) supply current to both the vehicle's traction motors (14) and noncritical electrical components (16), a relay (28) responsive to the usage signal sheds the noncritical component's load from the batteries (12) when current usage rises above a given level. A current limiter (30) responsive to the usage signal is preferably also provided to limit the supply of current to the traction motors (14) when current usage rises above a still higher level.
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Impullitti Joseph F.
Meir David S.
Roterman Thaddeus
Sway-Tin Min
Zawacki Ronald A.
Chrysler Corporation
Solis Jose M.
Taravella Christopher A.
Wieder Kenneth A.
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