Protection method for limited charging/discharging current of hybrid electric vehicle battery and a device and a system thereof
AssigneeChery Automobile Co., Ltd.
InventorFang Li
Life of this patent
Estimating the term…
Abstract
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.
Claims10
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;
- determining a charging or discharging state of the battery and calculating a limit torque value from an actual current value and a predetermined limit value;
- and
- comparing 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.
A device for protective limiting of charging and discharging current of a battery in a hybrid powered vehicle, comprising:
- a first processing unit adapted to receive a power request and to determine an initial torque value in response to the power request;
- a second processing unit adapted to 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;
- a third processing unit adapted to calculate a limit torque value from the limit power value and an angular velocity of a motor;
- and
- a fourth processing unit adapted to compare 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.
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 first processing unit adapted to receive a power request and to determine an initial torque value in response to the power request;
- a second processing unit adapted to 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;
- a third processing unit adapted to calculate a limit torque value from the limit power value and an angular velocity of a motor;
- and
- a fourth processing unit adapted to compare 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.
Dependencies are inferred from the claim text.