Control device for secondary battery to correct battery characteristics on open circuit voltage to remaining capacity
The present disclosure provides a control device for a secondary battery, and the control device includes a controller configured to correct battery characteristics on an open circuit voltage to a remaining capacity of the secondary battery. In the control device for the secondary battery, the controller acquires data of a plurality of open circuit voltages in the battery characteristics during charging the secondary battery. When the secondary battery is fully charged, the controller corrects the open circuit voltages between respective pairs selected and combined from at least one part of the data of the plurality of open circuit voltages. The controller weighted-averages and corrects full charge capacities, which are calculated by the correction of the open circuit voltages between the respective data pairs, with differences each between respective remaining capacities each corresponding between the respective data pairs.
1. A control device for a secondary battery, the control device comprising a controller configured to correct battery characteristics on an open circuit voltage to a remaining capacity of the secondary battery,
wherein the controller acquires data of a plurality of open circuit voltages in the battery characteristics during charging the secondary battery,
wherein, when the secondary battery is fully charged, the controller corrects the open circuit voltages between respective data pairs selected and combined from at least one part of the data of the plurality of open circuit voltages, and
wherein the controller weighted-averages and corrects full charge capacities, which are calculated by the correction of the open circuit voltages between the respective data pairs, with differences each between respective remaining capacities each corresponding between the respective data pairs.
2. The control device for the secondary battery as claimed in claim 1 ,
wherein, when the controller acquires data of the plurality of open circuit voltages in the battery characteristics during charging the secondary battery, the controller stops the charging for a predetermined time during charging the secondary battery, and then, predicts an open circuit voltage of the secondary battery, based on a plurality of voltage fluctuation values of the open circuit voltages at predetermined time intervals between before and after the stopping and on a temperature of the secondary battery.
3. The control device for the secondary battery as claimed in claim 2 ,
wherein the controller trains a neural network, that receives as input the plurality of voltage fluctuation values of the open circuit voltages and the temperature of the secondary battery and outputs the open circuit voltages, by using predetermined training sets, and the controller predicts the open circuit voltages of the secondary battery by a trained neural network.
4. The control device for the a secondary battery as claimed in claim 3 ,
wherein the neural network is a three-layer perceptron.
5. Electronic equipment comprising the control device for the secondary battery as claimed in claim 1 .
6. A control method for a secondary battery executed by a control device including a controller configured to correct battery characteristics on an open circuit voltage to a remaining capacity of the secondary battery, the control method comprising the steps of:
by the controller, acquiring data of a plurality of open circuit voltages in the battery characteristics during charging the secondary battery;
when the secondary battery is fully charged, by the controller, correcting the open circuit voltages between respective data pairs selected and combined from at least one part of the data of the plurality of open circuit voltages, and
by the controller, weighted-averaging and correcting full charge capacities, which are calculated by the correction of the open circuit voltages between the respective data pairs, with differences each between respective remaining capacities each corresponding between the respective data pairs.
7. The control method for the secondary battery as claimed in claim 6 ,
wherein the step of acquiring the data of the plurality of open circuit voltages in the battery characteristics during charging the secondary battery includes stopping the charging for a predetermined time during charging the secondary battery, and then, predicting an open circuit voltage of the secondary battery, based on a plurality of voltage fluctuation values of the open circuit voltages at predetermined time intervals between before and after the stopping and on a temperature of the secondary battery.
8. The control method for the secondary battery as claimed in claim 7 ,
wherein the step of predicting the open circuit voltages of the secondary battery comprises:
training a neural network, that receives as input the plurality of voltage fluctuation values of the open circuit voltages and the temperature of the secondary battery and outputs the open circuit voltages, by using predetermined training sets; and
predicting the open circuit voltages of the secondary battery by a trained neural network.
9. The control method of a secondary battery as claimed in claim 8 ,
wherein the neural network is a three-layer perceptron.