Electric storage system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsJunichi MATSUMOTO, Takashi OGURA
Life of this patent
Estimating the term…
Abstract
An electric storage system includes plural electric storage elements, a voltage detection circuit, a discharging circuit, and a controller. The controller is configured to: (a) control an operation of the discharging circuit on the basis of the voltage values detected by the voltage detecting circuit, (b) determine a first reference voltage value indicating a lowest voltage value from the voltage values of the plurality of electric storage elements, (c) discharge the electric storage element indicating the voltage value of which a voltage difference from the first reference voltage value is greater than a first threshold value, and (d) set the first threshold value to a smaller value as the first reference voltage value becomes lower.
Claims6
An electric storage system comprising:
- a plurality of electric storage elements that are connected in series, a slope of a voltage curve of the electric storage element at a lower-limit voltage value being greater than a slope of the voltage curve at another voltage value in a range of an upper-limit voltage value and the lower-limit voltage value in which charging and discharging of the electric storage element are allowed, the voltage curve being a curve indicating a relationship between a charging quantity and a voltage value in the electric storage element;
- a voltage detecting circuit configured to detect the voltage values of each of the plurality of electric storage elements;
- a discharging circuit configured to discharge each of the plurality of electric storage elements;
- and
- a controller configured to:
- (a) control an operation of the discharging circuit on the basis of the voltage values detected by the voltage detecting circuit;
- (b) determine a first reference voltage value indicating a lowest voltage value from the voltage values of the plurality of electric storage elements;
- (c) discharge the electric storage element indicating the voltage value of which a voltage difference from the first reference voltage value is greater than a first threshold value;
- and
- (d) set the first threshold value to a smaller value as the first reference voltage value becomes lower.
Dependencies are inferred from the claim text.