Battery charge detecting variable loads
AssigneeCanon Kabushiki Kaisha
InventorsKoji Takahashi, Isao Harigaya, Hiroyuki Takimoto, Kazumitsu Tobe, Takayuki Saeki
Life of this patent
Estimating the term…
Abstract
Device for detecting the charge condition of a battery which measures the first output of the battery when connected to the first load and the second output of the battery when connected to the second load, and performs a predetermined computation on the basis of both the first and second outputs of the battery to detect the charge condition of the battery. The charge condition of the battery can be very accurately detected.
Claims21
A device for detecting a state of charge of a battery, comprising:
- (A) measuring means for measuring a first output of the battery when connected to a first load and a second output of the battery when connected to a second load;
- and
- (B) detecting means for performing a predetermined computation on the basis of both the first output of the battery and the second output of the battery to detect the state of charge of the battery.
A device for detecting a state of charge of a battery, comprising:
- (A) measuring means for measuring a first output of the battery when connected to a first load and a second output of the battery when connected to a second load;
- and
- (B) detecting means for performing a predetermined computation on the basis of both the first output of the battery and the second output of the battery to detect the state of charge of the battery, wherein the detecting means corrects the state of charge of the battery on the basis of a reference data.
A device for detecting a state of charge of a battery, comprising:
- (A) measuring means for measuring a first output of the battery when connected to a first load and a second output of the battery when connected to a second load;
- (B) temperature compensation means for compensating the first output of the battery and the second output of the battery on the basis of a temperature condition;
- and
- (C) detecting means for performing predetermined computation on the basis of both the first output of the battery and the second output of the battery to detect the state of charge of the battery, said first output of the battery and said second output of the battery are temperature-compensated by said temperature compensation means.
A device for detecting a state of charge of a battery, comprising:
- (A) measuring means for measuring a first output of the battery when a system connected to the battery is in a first operation mode and a second output of the battery when the system connected to the battery is in a second operation mode, said first operation mode and said second operation mode having a different load;
- (B) detecting means for performing predetermined computation on the basis of both the first output of the battery and the second output of the battery to detect the state of charge of the battery;
- and
- (C) compensation means for compensating the state of charge of the battery when one of the first and second operation modes continues for a predetermined period on the basis of consumption of the battery in the operation mode.
A method of detecting a state of charge of a battery, comprising:
- (A) measuring a first output of the battery when connected to a first load and a second output of the battery when connected to a second load;
- and
- (B) performing a predetermined computation on the basis of both the first output of the battery and the second output of the battery to detect the state of charge of the battery.
A method of detecting a state of charge of a battery, comprising:
- (A) measuring a first output of the battery when connected to a first load and a second output of the battery when connected to a second load;
- and
- (B) performing a predetermined computation on the basis of both the first output of the battery and the second output of the battery to detect the state of charge of the battery, wherein the performing step corrects the state of charge of the battery on the basis of a reference data.
A method of detecting a state of charge of a battery, comprising:
- (A) measuring a first output of the battery when connected to a first load and a second output of the battery when connected to a second load;
- (B) temperature compensating the first output of the battery and the second output of the battery on the basis of a temperature condition;
- and
- (C) performing predetermined computation on the basis of both the first output of the battery and the second output of the battery to detect the state of charge of the battery, said first output of the battery and said second output of the battery being temperature-compensated by said temperature compensating step.
A method of detecting a state of charge of a battery, comprising:
- (A) measuring a first output of the battery when a system connected to the battery is in a first operation mode and a second output of the battery when the system connected to the battery is in a second operation mode, said first operation mode and said second operation mode having a different load;
- (B) performing predetermined computation on the basis of both the first output of the battery and the second output of the battery to detect the state of charge of the battery;
- and
- (C) compensating the state of charge of the battery when one of the first and second operation modes continues for a predetermined period on the basis of consumption of the battery in the operation mode.
Dependencies are inferred from the claim text.