Vehicular hybrid drive system with battery arctic management
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United States of America Patent
Stats
-
Sep 12, 2000
Grant Date -
N/A
app pub date -
Jul 2, 1999
filing date -
Jul 3, 1998
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A battery management for a hybrid drive system for a vehicle recovers input and output performance of a battery if the battery temperature is low. If the battery temperature is less than or equal to a predetermined value (or if the battery internal resistance is greater than or equal to a predetermined value), the battery needs to recover its input and output performance. Under this condition, the state of charge (SOC) of the battery is determined and compared with a predetermined value. The comparison result is used to determine whether the battery is capable of discharging or the battery needs charging. If SOC is greater than or equal to the predetermined value, a controller conducts forced discharge from the battery to operate an electric motor of the hybrid drive system in power mode. This forced discharge causes an increase ion the battery temperature, thus causing the battery to recover its input and output performance.
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