Power supply system, vehicle with the same and charge/discharge control method
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60L-009/00
B60L-011/00
G01F-017/00
출원번호
US-0451534
(2008-06-10)
등록번호
US-8682517
(2014-03-25)
우선권정보
JP-2007-158727 (2007-06-15)
국제출원번호
PCT/JP2008/060933
(2008-06-10)
§371/§102 date
20091117
(20091117)
국제공개번호
WO2008/153170
(2008-12-18)
발명자
/ 주소
Iida, Takahide
출원인 / 주소
Toyota Jidosha Kabushiki Kaisha
대리인 / 주소
Oliff PLC
인용정보
피인용 횟수 :
3인용 특허 :
17
초록▼
A vehicle starts traveling in an EV travel mode. When a reset request is issued to a first power storage unit, current control is performed to discharge actively the first power storage unit. After time when charging by an external power supply becomes allowed, a discharge current of the first power
A vehicle starts traveling in an EV travel mode. When a reset request is issued to a first power storage unit, current control is performed to discharge actively the first power storage unit. After time when charging by an external power supply becomes allowed, a discharge current of the first power storage unit to be reset is kept at a constant current value, and a second power storage unit not to be reset is charged with a charge current including at least the discharge current of the first power storage unit. When a distinctive point appears on a battery voltage characteristic of the first power storage unit at a subsequent time, an estimated value of an SOC of the first power storage unit is reset to a predetermined reference value.
대표청구항▼
1. A power supply system comprising: a plurality of power storage units;a plurality of voltage converting units corresponding to said plurality of power storage units, respectively;a power line pair connected to said plurality of voltage converting units in parallel;a charging unit for charging said
1. A power supply system comprising: a plurality of power storage units;a plurality of voltage converting units corresponding to said plurality of power storage units, respectively;a power line pair connected to said plurality of voltage converting units in parallel;a charging unit for charging said plurality of power storage units by receiving an electric power from an external power supply;a state estimating unit for estimating a charge state value of each of said plurality of power storage units, said state estimating unit successively calculating the charge state value of each of said plurality of power storage units based on an integrated value of a charge/discharge quantity of each of the power storage units; anda control unit for controlling a voltage converting operation in said plurality of voltage converting units, whereinwhen said plurality of power storage units become chargeable by the external power supply, said control unit controls the voltage converting unit corresponding to a first power storage unit, which is any one among said plurality of power storage units, to discharge said first power storage unit, and controls the voltage converting unit(s) corresponding to the remaining power storage unit(s) to charge said remaining power storage unit with at least the discharge current discharged from said first power storage unit, andsaid state estimating unit resets the charge state value of said first power storage unit to a reference value based on the discharge current of said first power storage unit before said plurality of power storage units is charged by the external power supply. 2. The power supply system according to claim 1, wherein said state estimating unit resets the charge state value of said first power storage unit to said reference value at predetermined timing based on a time-based change in discharge voltage of said first power storage unit. 3. The power supply system according to claim 1, wherein said control unit controls the voltage converting unit corresponding to said first power storage unit to charge said first power storage unit with the charge current supplied from said charging unit after said state estimating unit resets the charge state value of said first power storage unit to said reference value, and controls the corresponding voltage converting unit such that the charge current supplied to said first power storage unit is larger than the charge current supplied to said remaining power storage unit(s). 4. The power supply system according to claim 1, wherein said charging unit is electrically connected between said first power storage unit and the voltage converting unit corresponding to said first power storage unit. 5. The power supply system according to claim 1, further comprising: a request generating unit for generating a reset request for said first power storage unit based on a charge/discharge frequency of said first power storage unit, whereinsaid control unit starts the discharging from said first power storage unit in response to said reset request during the charging by said external power supply. 6. The power supply system according to claim 5, wherein said request generating unit is able to select the power storage unit specified by said reset request, based on the respective charge frequencies of said plurality of power storage units. 7. The power supply system according to claim 5, wherein said power supply system is configured to be able to supply an electric power to a load device electrically connected to said power supply system via said power line pair, andsaid control unit controls said plurality of voltage converting units in response to said reset request such that the discharge current discharged from said first power storage unit to said load device is larger than the discharge current discharged from each of said remaining power storage unit to said load device, before the start of charging said plurality of power storage units by the external power supply. 8. A vehicle comprising: an engine;a plurality of power storage units;a plurality of voltage converting units corresponding to said plurality of power storage units, respectively;a power line pair connected to said plurality of voltage converting units in parallel;a charging unit for charging said plurality of power storage units by receiving an electric power from an external power supply;an electric motor connected to said power line pair for generating a drive power by receiving the electric power from said plurality of power storage units;a power generating unit connected to said power line pair for generating the electric power by receiving the drive power from said engine;a state estimating unit for estimating a charge state value of each of said plurality of power storage units, said state estimating unit successively calculating the charge state value of each of said plurality of power storage units based on an integrated value of a charge/discharge quantity of each of the power storage units;a control unit for controlling a voltage converting operation in any one of said plurality of voltage converting units; anda request generating unit for generating a reset request for one of said plurality of power storage units based on charge/discharge frequencies of said plurality of power storage units, whereinsaid vehicle is able to travel by selecting a first travel mode for restricting the charging of said plurality of power storage units by said power generating unit and a second travel mode for controlling the charging of said plurality of power storage units by said power generating unit to keep a charge state value of each of the power storage units within a predetermined range,when said reset request is issued, said control unit controls said plurality of voltage converting units such that the discharge current discharged from the power storage unit to be reset specified by said reset request to said electric motor becomes larger than the discharge current discharged from each of said remaining power storage unit(s) to said electric motor, during the traveling in the first travel mode,when said reset request is issued and a state allowing the charging of said plurality of power storage units by the external power supply is attained, said control unit controls the voltage converting unit corresponding to the power storage unit to be reset to discharge the power storage unit to be reset, and controls the voltage converting unit(s) corresponding to said remaining power storage unit(s) to charge said remaining power storage unit(s) with at least the discharge current discharged from said power storage unit to be reset, andsaid state estimating unit resets the charge state value of said power storage unit to be reset to a reference value based on the discharge current of said power storage unit to be reset before said plurality of power storage units is charged by the external power supply. 9. A charge/discharge control method of a power supply system provided with a plurality of power storage units, wherein said power supply system includes:a plurality of voltage converting units corresponding to said plurality of power storage units, respectively,a power line pair connected to said plurality of voltage converting units in parallel, anda charging unit for charging said plurality of power storage units by receiving an electric power from an external power supply; andsaid charge/discharge control method comprise the steps of:successively calculating, with an electronic control unit, a charge state value of each of said plurality of power storage units based on an integrated value of a charge/discharge quantity of each of the power storage units;controlling, with the electronic control unit, the voltage converting unit corresponding to a first power storage unit, which is any one among said plurality of power storage units, to discharge said first power storage unit, and controlling the voltage converting unit corresponding to the remaining power storage unit(s) to charge the remaining power storage unit(s) with at least the discharge current discharged from said first power storage unit, when said plurality of power storage units become chargeable by the external power supply; andresetting, with the electronic control unit, the charge state value of said first power storage unit to a reference value based on the discharge current of said first power storage unit before said plurality of power storage units is charged by the external power supply.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (17)
Barkat Shakil H. ; Mottier Matthew D. ; Ng Richard, Apparatus and method for discharging and charging a multiple battery arrangement.
Kimura Yoshio,JPX ; Nonobe Yasuhiro,JPX ; Horiguchi Munehisa,JPX, Power supply system, electric vehicle with power supply system mounted thereon, and method of regulating amount of fuel.
Nada, Mitsuhiro, Vehicle with power source system mounted thereon, power source system controller, method of controlling power source system, and method of controlling start of such vehicle.
Oh, Sung Min; Moon, Tae Kyung; Moon, Hyung Tae; Hwang, Sun Min, Apparatus for charging both main battery and auxiliary battery using the same primary winding and two different secondary windings of single transformer.
Shin, Dong Jun; Noh, Soung Han; Park, Jun Yeon; Yoo, Chang Ryeol; Hwang, Hwan, Circuit for controlling low power DC-DC converter of hybrid vehicle and method for controlling low power DC-DC converter.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.