Protection method for limited charging/discharging current of hybrid electric vehicle battery and a device and a system thereof
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60L-009/00
B60L-011/00
G05D-001/00
G05D-003/00
G06F-007/00
G06F-017/00
B60W-010/24
B60W-020/00
출원번호
US-0743549
(2008-12-24)
등록번호
US-8423211
(2013-04-16)
우선권정보
CN-2007 1 0306999 (2007-12-29)
국제출원번호
PCT/CN2008/073695
(2008-12-24)
§371/§102 date
20100518
(20100518)
국제공개번호
WO2009/089718
(2009-07-23)
발명자
/ 주소
Li, Fang
출원인 / 주소
Chery Automobile Co., Ltd.
대리인 / 주소
Kilpatrick Townsend & Stockton LLP
인용정보
피인용 횟수 :
5인용 특허 :
5
초록▼
A limited protection method for charging/discharging current of hybrid electric vehicle battery and a device and a system thereof is disclosed. Said method includes: receiving a power requirement and determining an original torque based on the power requirement; judging a charge/discharge state of t
A limited protection method for charging/discharging current of hybrid electric vehicle battery and a device and a system thereof is disclosed. Said method includes: receiving a power requirement and determining an original torque based on the power requirement; judging a charge/discharge state of the battery and acquiring a limited torque from an actual current and a predefined torque; comparing said original torque with the limited torque to select the smaller one as a final output requirement. The embody of the invention can achieve the real-time limited protection for charge/discharge current of hybrid electric vehicle battery.
대표청구항▼
1. A method for protective limiting of charging and discharging current of a battery in a hybrid powered vehicle, comprising: receiving a power request and determining an initial torque value in response to the power request, by a processor;determining, by the processor, a charging or discharging st
1. A method for protective limiting of charging and discharging current of a battery in a hybrid powered vehicle, comprising: receiving a power request and determining an initial torque value in response to the power request, by a processor;determining, by the processor, a charging or discharging state of the battery, and calculating, by the processor, a limit torque value from a measured current value; andcomparing the initial torque value and the limit torque value and selecting the smaller one of them as a torque request value to be finally output to a motor control unit, by the processor,wherein calculating the limit torque value comprises when the battery is in a discharging state, multiplying by a Hybrid Control Unit a measured voltage value of the battery by a discharging current limit value of the battery to derive a discharging limit power P2; andwhen the measured current value is below an initial control value of discharging current, taking a output limit power Plimit—2 as P2, and calculating a limit torque value from the output limit power and an angular velocity of the motor. 2. The method according to claim 1, wherein calculating the limit torque value further comprises: when the measured current value is above the initial control value of discharging current, performing Proportional integral feedback, PI, adjusting with Ierror=Ibattery−Idischarge—limit to derive a torque deviation value PPI—2, wherein Ibattery is the measured current value of the battery, and Idischarge—limit is the discharging current limit value of the battery; deriving a resultant output limit power Plimit—2=P2+PPI—2 from PPI—2 and P2; and calculating a limit torque value from the output limit power Plimit—2 and an angular velocity of the motor. 3. The method according to claim 1, wherein determining a charging or discharging state of the battery comprises: determining a charging or discharging state of the battery from voltage and current signals of the high voltage battery. 4. A device for protective limiting of charging and discharging current of a battery in a hybrid powered vehicle, comprising: a processor adapted toreceive a power request and to determine an initial torque value in response to the power request,determine a charging or discharging state of the battery and to calculate a limit power value of charging or discharging the battery from BMS feedback values, the BMS feedback values at least comprising a measured current value of the battery,calculate a limit torque value from the limit power value and an angular velocity of a motor, andcompare the initial torque value and the limit torque value and to select the smaller one of them as a torque request value to be finally output to a motor control unit,wherein calculating the limit torque value from the limit power value and an angular velocity of the motor comprises a comparison unit adapted to compare a measured current value and an initial control value of discharging current; anda calculation unit adapted to calculate a limit torque value from the output limit power P.sub.2 and an angular velocity of the motor when the measured current value is below the initial control value of discharging current; and to perform Proportional integral feedback PI adusting with Ierror=Ibattery−Idischarge—limit to derive a torque deviation value PPI—2,wherein Ibattery is the measured current value of the battery, and Idischarge—limit is the discharging current limit value of the battery, to derive a resultant output limit power Plimit—2=P2+PPI—2 from PPI—2 and P2, and to calculate a limit torque value from the output limit power Plimit—2 and an angular velocity of the motor when the measured current value is above the initial control value of discharging current. 5. A hybrid powered vehicle system, comprising a Battery Management System BMS, a Hybrid Control Unit HCU, an Engine Management System EMS, a Motor Control Unit MCU, a motor, an engine, a synthesizer and a power transmission system, wherein the HCU comprises a device for protective limiting of charging and discharging current of a battery and the device comprises: a processor adapted toreceive a power request and to determine an initial torque value in response to the power request,determine a charging or discharging state of the battery and to calculate a limit power value of charging or discharging the battery from BMS feedback values, the BMS feedback values at least comprising a measured current value of the battery,calculate a limit torque value from the limit power value and an angular velocity of a motor, andcompare the initial torque value and the limit torque value and to select the smaller one of them as a torque request value to be finally output to the motor control unit,wherein calculating the limit torque value from the limit power value and an angular velocity of the motor comprises a comparison unit adapted to compare a measured current value and an initial control value of discharging current; anda calculation unit adapted to calculate a limit torque value from the output limit power P.sub.2 and an angular velocity of the motor when the measured current value is below the initial control value of discharging current; and to perform Proportional integral feedback, PI, adjusting with Ierror=Ibattery−Idischarge—limit to derive a torque deviation value PPI—2,wherein Ibattery is the measured current value of the battery, and Idischarge—limit is the discharging current limit value of the battery, to derive a resultant output limit power Plimit—2=P2+PPI—2 from PPI—2 and P2, and to calculate a limit torque value from the output limit power Plimit—2 and an angular velocity of the motor when the measured current value is above the initial control value of discharging current.
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이 특허에 인용된 특허 (5)
Grabowski, John Robert; Degner, Michael W., Battery current limiter for a high voltage battery pack in a hybrid electric vehicle powertrain.
Schmitz Robert W. ; Wilton Thomas F. ; Anderson Joshua J., Method and apparatus for adaptively controlling a state of charge of a battery array of a series type hybrid electric vehicle.
Kikuchi Yoshiaki,JPX ; Asakawa Fumihiko,JPX ; Nakanishi Toshiaki,JPX ; Kimura Tadao,JPX, Secondary battery charge control device and method of using the same.
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