Apparatus for estimating state of charge of rechargeable battery charged by vehicle-mounted power generation apparatus
First Claim
1. An apparatus for estimating a state of charge of a rechargeable battery charged by a vehicle-mounted power generation apparatus capable of generating a variable output voltage, comprising a configuration to perform:
- a detecting function of detecting a charging/discharging current of said rechargeable battery; and
an estimating function of making an estimation of said state of charge on the basis of relationship data defining relationship among said output voltage, said state of charge, a convergence value to which said charging/discharging current converges through transient behavior thereof depending on a polarization state of said rechargeable battery in a state where variation of said output voltage is below a predetermined value after said output voltage is changed, and a plurality of values of said charging/discharging current during said transient behavior detected by said detecting function using a characteristic of the rechargeable battery that the charging/discharging current transiently converges to the convergence value with dissolution of the polarization state due to change of the output voltage.
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Abstract
The apparatus is for estimating a state of charge of a rechargeable battery charged by a vehicle-mounted power generation apparatus capable of generating a variable output voltage. The estimating apparatus includes a detecting function of detecting a charging/discharging current of the rechargeable battery, and an estimating function of making an estimation of the state of charge on the basis of relationship data defining the relationship among the output voltage, the state of charge, and a convergence value to which the charging/discharging current converges through transient behavior thereof in a state where variation of the output voltage is below a predetermined value after the output voltage is changed.
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Citations
20 Claims
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1. An apparatus for estimating a state of charge of a rechargeable battery charged by a vehicle-mounted power generation apparatus capable of generating a variable output voltage, comprising a configuration to perform:
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a detecting function of detecting a charging/discharging current of said rechargeable battery; and an estimating function of making an estimation of said state of charge on the basis of relationship data defining relationship among said output voltage, said state of charge, a convergence value to which said charging/discharging current converges through transient behavior thereof depending on a polarization state of said rechargeable battery in a state where variation of said output voltage is below a predetermined value after said output voltage is changed, and a plurality of values of said charging/discharging current during said transient behavior detected by said detecting function using a characteristic of the rechargeable battery that the charging/discharging current transiently converges to the convergence value with dissolution of the polarization state due to change of the output voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A charge control system including a vehicle-mounted power generation apparatus capable of generating a variable output voltage, and an apparatus for estimating a state of charge of a rechargeable battery charged by said vehicle-mounted power generation apparatus, said system comprising a configuration to perform:
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a detecting function of detecting a charging/discharging current of said rechargeable battery; and an estimating function of making an estimation of said state of charge on the basis of relationship data defining relationship among said output voltage, said state of charge, a convergence value into which said charging/discharging current converges through transient behavior thereof depending on a polarization state of said rechargeable battery in a state where variation of said output voltage is below a predetermined value after said output voltage is changed, and a plurality of values of said charging/discharging current during said transient behavior detected by said detecting function using a characteristic of the rechargeable battery that the charging/discharging current transiently converges to the convergence value with dissolution of the polarization state due to change of the output voltage.
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13. An apparatus for estimating a state of charge of a rechargeable battery charged by a vehicle-mounted power generation apparatus capable of generating a variable output voltage, comprising:
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a detector configured to detect a charging/discharging current of said rechargeable battery; and a controller configured to make an estimation of said state of charge on the basis of relationship data defining relationship among said output voltage, said state of charge, a convergence value to which said charging/discharging current converges through transient behavior thereof depending on a polarization state of said rechargeable battery in a state where variation of said output voltage is below a predetermined value after said output voltage is changed, and a plurality of values of said charging/discharging current during said transient behavior detected by said detector using a characteristic of the rechargeable battery that the charging/discharging current transiently converges to the convergence value with dissolution of the polarization state due to change of the output voltage. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification