Electrically powered vehicle
First Claim
1. An electrically powered vehicle comprising:
- a power storage system for supplying an electric power to a drive source; and
a charge/discharge control device for charging and discharging said power storage system, whereinsaid power storage system is formed of a plurality of chargeable and dischargeable power storage units connected in series,said charge/discharge control device includes;
a discharging unit for discharging said power storage system with a constant current, anda state-of-charge estimating unit estimating a state of charge of each of said plurality of power storage units, and resetting the states of charge of said plurality of power storage units to reference values according to predetermined timing based on temporal changes in voltage values of said plurality of power storage units during discharging of said power storage system, andsaid state-of-charge estimating unit sets the respective reference values for said plurality of power storage units based on voltage values and temperatures of said plurality of power storage units exhibited according to said predetermined timing, and resets the states of charge of said plurality of power storage units to said set reference values, respectively.
1 Assignment
0 Petitions
Accused Products
Abstract
A first power storage unit is a battery assembly, and is divided into battery blocks of n (n is a natural number) in number each formed of several electric cells connected together in series. When a state allowing charging with an external power supply is attained, the ECU executes an operation of resetting an SOC of a first power storage unit. The ECU controls a corresponding converter to discharge the first power storage unit with a constant current, and sets reset values for battery blocks of n in number based on battery voltages and battery temperatures exhibited when any one of the battery voltages of the n battery blocks becomes lower than a reset voltage. The ECU resets the SOCs of the battery blocks of the first power storage unit to the respective reset values thus set.
19 Citations
8 Claims
-
1. An electrically powered vehicle comprising:
-
a power storage system for supplying an electric power to a drive source; and a charge/discharge control device for charging and discharging said power storage system, wherein said power storage system is formed of a plurality of chargeable and dischargeable power storage units connected in series, said charge/discharge control device includes; a discharging unit for discharging said power storage system with a constant current, and a state-of-charge estimating unit estimating a state of charge of each of said plurality of power storage units, and resetting the states of charge of said plurality of power storage units to reference values according to predetermined timing based on temporal changes in voltage values of said plurality of power storage units during discharging of said power storage system, and said state-of-charge estimating unit sets the respective reference values for said plurality of power storage units based on voltage values and temperatures of said plurality of power storage units exhibited according to said predetermined timing, and resets the states of charge of said plurality of power storage units to said set reference values, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification