Method of protecting battery for hybrid vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsJae Sung Gu, Suk Hyung Kim
Life of this patent
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Abstract
The present invention provides a method of protecting a battery for a hybrid vehicle, in which a counter electromotive voltage of a motor is limited by limiting engine RPM if it is determined that there is a risk of battery overcharge in the event of a failure of a component related to motor control, such as a motor controller, a battery controller, etc., thus protecting the battery from the risk of overcharge and securing safety of the battery.
Claims6
A method of protecting a battery for a hybrid vehicle, the method comprising:
- determining whether there is a failure in a main relay interposed between a battery and a motor inverter by determining whether the main relay is fused;
- determining whether there is a failure in the motor inverter, if it is determined that the main relay is fused;
- determining whether there is a failure in the battery by determining whether there is a risk of overcharge of the battery, if it is determined that there is a failure in the motor inverter;
- and
- controlling an upper limit engine speed to maintain a motor counter electromotive voltage at a sub-overcharge voltage, if it is determined that there is a failure in the battery, thus protecting the battery from the risk of overcharge.
A method of protecting a battery for a hybrid vehicle, the method comprising:
- determining whether communication of a motor controller is in an ON state or in an OFF state;
- determining whether communication of a battery controller is in an ON state or in an OFF state, if it is determined that the communication of the motor controller is in the OFF state;
- and
- controlling an upper limit engine speed to limit a motor counter electromotive force so as to maintain a motor counter electromotive voltage at a sub-overcharge voltage, if it is determined that the communication of the battery controller is in the OFF state, thus protecting the battery from a risk of overcharge.
Dependencies are inferred from the claim text.