Power supply system and vehicle with the system
First Claim
1. A power supply system supplying electric power to a load device mounted on a vehicle, comprising:
- a rechargeable power storage device;
a temperature detecting unit that detects a temperature of said power storage device;
a state estimating unit that estimates a state of charge of said power storage device;
a charging unit that externally charges said power storage device by receiving electric power from an external power source; and
a control unit that controls charging/discharging of said power storage device;
wherein said control unit includes;
a target value setting unit that sets, when said power storage device attains to a state ready for charging by the external power source, a target state of charge of said power storage device in accordance with the temperature of said power storage device, anda charge control unit that controls charging power to said power storage device such that state of charge of said power storage device attains to said target state of charge, andsaid target value setting unit sets said target state of charge to be smaller as the temperature of said power storage device becomes higher, andsaid target value setting unit predicts degradation ratio of said power storage device at a time point of completion of external charging, based on degradation characteristic of said power storage device in connection with the state of charge and the temperature of said power storage device obtained in advance, and sets said target state of charge in accordance with the temperature of said power storage device such that predicted degradation ratio does not exceed tolerable degradation ratio at the time point of completion of external charging.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle includes a charging unit receiving electric power from an external power source and externally charging a power storage unit. When a connector unit is coupled to the vehicle and a state ready for charging by the external power source is attained, a controller predicts degradation ratio of the power storage unit at the time point of completion of external charging based on degradation characteristic of the power storage unit in connection with SOC and battery temperature obtained in advance, and sets target state of charge of each power storage unit based on the battery temperatures so that the predicted degradation ratio does not exceed tolerable degradation ratio at the time point of completion of external charging. Then, the controller controls corresponding converters such that SOCs of power storage units attain the target states of charge.
71 Citations
10 Claims
-
1. A power supply system supplying electric power to a load device mounted on a vehicle, comprising:
-
a rechargeable power storage device; a temperature detecting unit that detects a temperature of said power storage device; a state estimating unit that estimates a state of charge of said power storage device; a charging unit that externally charges said power storage device by receiving electric power from an external power source; and a control unit that controls charging/discharging of said power storage device; wherein said control unit includes; a target value setting unit that sets, when said power storage device attains to a state ready for charging by the external power source, a target state of charge of said power storage device in accordance with the temperature of said power storage device, and a charge control unit that controls charging power to said power storage device such that state of charge of said power storage device attains to said target state of charge, and said target value setting unit sets said target state of charge to be smaller as the temperature of said power storage device becomes higher, and said target value setting unit predicts degradation ratio of said power storage device at a time point of completion of external charging, based on degradation characteristic of said power storage device in connection with the state of charge and the temperature of said power storage device obtained in advance, and sets said target state of charge in accordance with the temperature of said power storage device such that predicted degradation ratio does not exceed tolerable degradation ratio at the time point of completion of external charging. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10)
-
-
9. A vehicle, comprising:
-
a power supply system; and a driving force generating unit receiving electric power supplied from said power supply system and generating driving force;
whereinsaid power supply system includes a rechargeable power storage device; a temperature detecting unit that detects a temperature of said power storage device; a state estimating unit that estimates a state of charge of said power storage device; a charging unit that externally charges said power storage device by receiving electric power from an external power source; and a control unit that controls charging/discharging of said power storage device; wherein said control unit includes; a target value setting unit that sets, when said power storage device attains to a state ready for charging by the external power source, a target state of charge of said power storage device in accordance with the temperature of said power storage device, and a charge control unit that controls charging power to said power storage device such that state of charge of said power storage device attains to said target state of charge, and said target value setting unit sets said target state of charge to be smaller as the temperature of said power storage device becomes higher, said target value setting unit predicts degradation ratio of said power storage device at a time point of completion of external charging, based on degradation characteristic of said power storage device in connection with the state of charge and the temperature of said power storage device obtained in advance, and sets said target state of charge in accordance with the temperature of said power storage device such that predicted degradation ratio does not exceed tolerable degradation ratio at the time point of completion of external charging.
-
Specification