Remaining capacity meter and detection method for electric vehicle battery
First Claim
1. A remaining capacity meter for an electric vehicle battery, said meter being suited for use in the detection of a remaining capacity of the electric vehicle battery, comprising:
- full charge detection means for detecting whether said battery has been brought into a fully-charged state;
remaining capacity setting means for setting, as a full-charge-time capacity, the remaining capacity of said battery at the time of detection of the fully-charged state by the full charge detection means;
discharge/charge-based correction means for correcting the remaining capacity, which has been set by said remaining capacity setting means, while integrating, with respect to time, a current discharged from or charged into said battery; and
deterioration-based correction means for correcting the fully-charged capacity, which has been set by said remaining capacity setting means, by a deterioration-based correction quantity corresponding to the number of chargings and battery temperatures at the time of the respective chargings.
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Accused Products
Abstract
A remaining capacity meter is provided for an electric vehicle battery. This meter is suited for use in the detection of a remaining capacity of the electric vehicle battery. The meter includes a full charge detection device for detecting whether the battery has been brought into a fully-charged state, a remaining capacity setting device for setting, as a full-charge-time capacity, the remaining capacity of the battery at the time of detection of the fully-charged state by the full charge detection device, a discharge/charge-based correction device for correcting the remaining capacity, which has been set by the remaining capacity setting device, while integrating, with respect to time, a current discharged from or charged into the battery, and a deterioration-based correction device for correcting the fully-charged capacity, which has been set by the remaining capacity setting device, by a deterioration-based correction quantity corresponding to the number of chargings and battery temperatures at the time of the respective chargings. A method for the detection of the remaining capacity of such an electric vehicle battery is also described.
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Citations
11 Claims
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1. A remaining capacity meter for an electric vehicle battery, said meter being suited for use in the detection of a remaining capacity of the electric vehicle battery, comprising:
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full charge detection means for detecting whether said battery has been brought into a fully-charged state; remaining capacity setting means for setting, as a full-charge-time capacity, the remaining capacity of said battery at the time of detection of the fully-charged state by the full charge detection means; discharge/charge-based correction means for correcting the remaining capacity, which has been set by said remaining capacity setting means, while integrating, with respect to time, a current discharged from or charged into said battery; and deterioration-based correction means for correcting the fully-charged capacity, which has been set by said remaining capacity setting means, by a deterioration-based correction quantity corresponding to the number of chargings and battery temperatures at the time of the respective chargings. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A remaining capacity detection method for an electric vehicle battery, said method being useful for the detection of a remaining capacity of said electric vehicle battery, comprising the following steps:
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detecting whether said battery has been brought into a fully-charged state; setting a full-charge-time capacity, which has been obtained by correcting an initial full-charge-time capacity of said battery by a deterioration-based correction amount corresponding to the number of chargings of said battery and the battery temperatures at the time of the respective chargings, as the remaining capacity of said battery when said battery has been brought into the fully-charged state; and correcting the remaining capacity, which has been set in the remaining capacity setting step, while integrating, with respect to time, a current discharged from or charged into said battery. - View Dependent Claims (8, 9, 10, 11)
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Specification