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US 8,577,529 B2Granted
Control apparatus for vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKenji Takahashi, Yuji Nishi, Shuji Tomura, Takeshi Takemoto, Nobuyasu Haga, Tetsuya Fuchimoto, Tetsuya Sugimoto
Life of this patent
Estimating the term…
Abstract
A control apparatus (30) estimates a status of charge (SOC) by a first estimation method by temporarily changing the SOC of a battery (B) so that the SOC of the battery (B) falls within a first region in the case a period, during which the estimated value of the status of charge of the battery (B) falls within a second region, exceeds a prescribed period.
Claims9
A control apparatus for a vehicle, wherein
- the vehicle includes a battery and a motor that drives by receiving electrical power from the battery, and
- characteristics of changes in open circuit voltage relative to a status of charge of the battery include a first region in which an amount of change in the open circuit voltage relative to an amount of change in the status of charge exceeds a threshold value, and a second region in which the amount of change in the open circuit voltage relative to the amount of change in the status of charge does not exceed the threshold value,
- the control apparatus comprising:
- a first estimation unit that, in the case an estimated value of the status of charge of the battery falls within the first region, updates the estimated value of the status of charge of the battery by estimating the status of charge according to a first estimation method that uses the voltage of the battery;
- a second estimation unit that, in the case the estimated value of the status of charge of the battery falls within the second region, updates the estimated value of the status of charge of the battery by estimating the status of charge according to a second estimation method that uses current that is input and output to and from the battery;
- and
- a third estimation unit that, in the case a period, during which the estimated value of the status of charge of the battery falls within the second region, exceeds a prescribed period, temporarily changes the status of charge of the battery so that the status of charge of the battery falls within the first region and estimates the status of charge by the first estimation method.
4 more elements
A vehicle control method for a vehicle having:
- a battery that has, as characteristics of changes in open circuit voltage relative to a status of charge, a first region in which an amount of change in the open circuit voltage relative to an amount of change in the status of charge exceeds a threshold value and a second region in which the amount of change in the open circuit voltage relative to the amount of change in the status of charge does not exceed the threshold value;
- and a motor that drives by receiving electrical power from the battery,
- the method comprising:
- estimating the status of charge of the battery;
- updating an estimated value of the status of charge of the battery by estimating the status of charge according to a first estimation method that uses voltage of the battery in the case the estimated value of the status of charge of the battery falls within the first region;
- updating the estimated value of the status of charge of the battery by estimating the status of charge of the battery according to a second estimation method that uses current that is input and output to and from the battery in the case the estimated value of the status of charge of the battery falls within the second region;
- and
- estimating the status of charge by the first estimation method by temporarily changing the status of the charge of the battery so that the status of charge of the battery falls within the first region in the case a period, during which the estimated value of the status of charge of the battery falls within the second region exceeds a prescribed period.
5 more elements
Dependencies are inferred from the claim text.