Maintaining a vehicle battery
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United States of America Patent
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Oct 9, 2018
Grant Date -
Feb 8, 2018
app pub date -
Aug 24, 2017
filing date -
May 13, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A method is provided for determining a lower voltage set-point, an upper voltage set-point, a temperature-dependent upper current set-point, a time limit value, and a lower current hysteresis threshold set-point based on a measured temperature of a battery. A charge current from a battery charging circuit is provided. If a charge voltage is above the lower voltage set-point and below the upper voltage set-point and the charge current exceeds the temperature-dependent upper current set-point, timer is started. If the timer reaches a time limit value while the charge current exceeds the temperature-dependent upper current set-point and the charge voltage is between the lower voltage set-point and the upper voltage set-point, the charge current is reduced.
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