Generator controller used in hybrid electric vehicle
First Claim
1. A generator controller used in a hybrid electric vehicle comprising a motor for propelling the hybrid electric vehicle, a battery capable of being charged and discharged, and a generator for producing a generated power having a value according to a command, a discharged power from the battery and the generated power of the generator being used as a driving power of the motor and a surplus of the generated power, relative to the driving power, being used as a charging power of the battery, the generator controller comprising:
- means for detecting a charging current and a discharged current;
means for detecting a change in a state of charge of the battery on the basis of the charging current and the discharged current;
means for determining a target generated power based on a change in the state of charge; and
means for controlling the generated power according to the target generated power.
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Accused Products
Abstract
A generator controller used in hybrid electric vehicle. The battery current is sampled and accumulated for T seconds. The obtained accumulated value is used to determine the control target of the generated power. Since the generated power is controlled according to the accumulated current of the battery which fits the battery'"'"'s characteristic compared to the charged-and-discharged power, the battery'"'"'s state of charge (SOC) can be more accurately controlled within the target zone. When the SOC of the battery is initially outside the target zone, the SOC is adjusted within the target zone by forcibly discharging or charging the battery. The precision of SOC control can be improved compared to when the SOC of the battery is controlled using the charged-and-discharged power.
62 Citations
20 Claims
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1. A generator controller used in a hybrid electric vehicle comprising a motor for propelling the hybrid electric vehicle, a battery capable of being charged and discharged, and a generator for producing a generated power having a value according to a command, a discharged power from the battery and the generated power of the generator being used as a driving power of the motor and a surplus of the generated power, relative to the driving power, being used as a charging power of the battery, the generator controller comprising:
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means for detecting a charging current and a discharged current; means for detecting a change in a state of charge of the battery on the basis of the charging current and the discharged current; means for determining a target generated power based on a change in the state of charge; and means for controlling the generated power according to the target generated power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification