Dual-Battery Mobility Control for Range and Power Loss Reduction
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Solution Overview
Problem
The fixed-type high-voltage battery mounted on electric vehicles poses challenges and disadvantages, limiting the vehicle's range and efficiency.
Innovation Solution
A dual battery system is introduced, comprising a first high-voltage battery permanently installed and a second high-voltage battery that can be added or detached, with a controller selecting the appropriate battery based on the driving mode and operational characteristics of the driving motor using a torque-to-RPM map to optimize power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-type high-voltage battery is mounted on the electric vehicle, then the vehicle can operate with a single battery system, but the vehicle's range and efficiency are limited
Solution Approach 1:
The battery system is segmented into a first high-voltage battery permanently installed in the vehicle and a second high-voltage battery that can be added or detached. This segmentation allows the system to adapt between single-battery and dual-battery configurations, improving energy efficiency by selecting appropriate battery combinations based on driving conditions while maintaining system versatility.
2Use of energy by moving object
If a dual battery system is introduced with a detachable second battery, then energy efficiency and driving distance are improved, but the device complexity increases
Solution Approach 1:
The battery system configuration is made dynamic through the detachable second high-voltage battery. The system can transition between single-battery and dual-battery modes based on driving conditions, allowing optimization of energy efficiency without permanently increasing system complexity. The controller dynamically selects which battery to use based on operational characteristics.
Solution Approach 2:
The system changes operational parameters by selecting different battery configurations based on driving mode and motor operational characteristics. The controller adjusts battery selection parameters according to torque-RPM map areas, enabling optimized energy efficiency across different operating conditions while managing system complexity through intelligent control.
3Loss of energy
If the controller selects battery based on torque-to-RPM map areas and driving mode, then power loss is reduced and energy efficiency is enhanced, but the control system complexity increases
Solution Approach 1:
The controller changes operational parameters by selecting different battery configurations based on driving mode and motor operational characteristics. The controller adjusts battery selection parameters according to torque-RPM map areas, enabling optimized energy efficiency across different operating conditions while managing system complexity through intelligent control.
Solution Approach 2:
The control system uses feedback from the driving mode selection and motor operational characteristics to determine optimal battery configuration. The controller continuously monitors operational parameters and adjusts battery selection accordingly, reducing power loss through adaptive control while managing complexity through systematic decision-making based on real-time conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances energy efficiency, reduces power loss, increases driving distance, and improves usability by strategically utilizing both batteries based on voltage and driving conditions.
Implementation Method 1
a first battery and a second battery different from each other in voltage, the method comprising determining, by a controller of the mobility apparatus, one battery between the first battery and the second battery based on an operation point of the driving motor and a driving mode of the mobility apparatus
Data Source
AI summary
A method performed by an apparatus of a vehicle may include: selecting, by a controller of the vehicle, a driving mode, among a plurality of driving modes, for the vehicle; based on an operational characteristic of a driving motor of the vehicle and based on the selected driving mode, selecting a battery between a first battery of the vehicle and a second battery of the vehicle; and controlling, by the controller, the selected battery to supply power to the driving motor. The driving motor may supply a driving force to a plurality of wheels of the vehicle.