System for monitoring residual capacity of battery
First Claim
1. A battery monitor system for monitoring the residual capacity of a battery, comprising:
- residual capacity determining means for determining the residual capacity of the battery;
electric power determining means for detecting voltage and current and calculating the output electric power of the battery based on the detected voltage and current when the battery is being discharged; and
residual capacity correcting means for correcting the residual capacity determined by said residual capacity determining means depending on the output electric power calculated by said electric power determining means, such that as the output electric power of the battery increases, an updated residual capacity produced when the residual capacity is corrected by said residual capacity correcting means decreases.
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Accused Products
Abstract
A battery monitor system for monitoring the residual capacity of a battery has a controller for determining the residual capacity of a battery, detecting the output electric power of the battery when the battery is being discharged, and correcting the residual capacity depending on the output electric power such that as the output electric power of the battery increases, a new residual capacity produced when the residual capacity is corrected decreases. The residual capacity may be corrected by subtracting a residual capacity corrective value, which increases as the output electric power of the battery increases, from the residual capacity. The residual capacity of the battery can accurately be determined and monitored depending on the output electric power from the battery. In the case where the battery monitor system has a residual capacity display unit and is combined with an electric vehicle, the driver of the electric vehicle can visually recognize the residual capacity of the battery depending on the running condition of the electric vehicle.
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Citations
14 Claims
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1. A battery monitor system for monitoring the residual capacity of a battery, comprising:
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residual capacity determining means for determining the residual capacity of the battery; electric power determining means for detecting voltage and current and calculating the output electric power of the battery based on the detected voltage and current when the battery is being discharged; and residual capacity correcting means for correcting the residual capacity determined by said residual capacity determining means depending on the output electric power calculated by said electric power determining means, such that as the output electric power of the battery increases, an updated residual capacity produced when the residual capacity is corrected by said residual capacity correcting means decreases. - View Dependent Claims (2, 3, 4, 5, 6, 7, 10, 11)
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8. A battery monitor system for monitoring the residual capacity of a battery, comprising:
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residual capacity determining means for determining the residual capacity of the battery; electric power calculating means for calculating the output electric power of the battery when the battery is being discharged; residual capacity correcting means for correcting the residual capacity determined by said residual capacity determining means based on said calculated output electric power; and display means for indicating spent energy, the residual capacity and a residual capacity corrective value determined by said correcting means. - View Dependent Claims (12)
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9. A battery monitor system for monitoring the residual capacity of a battery comprising:
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residual capacity determining means for determining the residual capacity of the battery; electric power calculating means for calculating the output electric power of the battery when the battery is being discharged; battery internal resistance calculating means residual capacity correcting means for correcting the residual capacity determined by said residual capacity determining means depending on the output electric power calculated by said electric power calculating means and depending on a dead capacity caused by an increase in internal resistance as calculated by said battery internal resistance calculating means; and display means for indicating spent energy, the residual capacity and a residual capacity corrective value determined by said correcting means.
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13. A battery monitor system for monitoring the residual capacity of a battery, comprising:
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residual capacity determining means for determining the residual capacity of the battery at the time the battery starts being-discharged; detecting means for repeatedly detecting the voltage and current of the battery during discharge; discharging current integrating means for integrating the detected discharging current from the time the battery starts being discharged; electric power calculating means for calculating the output electric power of the battery based on the detected voltage and the detected current when the battery is being discharged; and residual capacity correcting means for correcting the residual capacity determined by said residual capacity determining means depending on the output electric power calculated by said electric power calculating means for determining an updated residual capacity, said updated residual capacity determined when the residual capacity is corrected by said residual capacity correcting means decreasing as the output electric power increases.
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14. A battery monitor system for monitoring the residual capacity of a battery, comprising:
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residual capacity determining means for determining the residual capacity of the battery at the time the battery starts being discharged; detecting means for repeatedly detecting the voltage and current of the battery during discharge; discharging current integrating means for integrating the detected discharging current from the time the battery starts being discharged; electric power calculating means for calculating the output electric power of the battery based on the detected voltage and the detected current when the battery is being discharged; residual capacity correcting means for correcting the residual capacity determined by said residual capacity determining means based on the calculated output electric power; and display means for indicating spent energy, the residual capacity and a residual capacity corrective value determined by said correcting means.
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Specification