Dual EV Battery Control for Range Extension and Power Loss Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric vehicles often face insufficient battery capacity, leading to limited driving range and inefficiencies in power usage, particularly due to the fixed nature of high voltage batteries and the need for optimized charging strategies.
Innovation Solution
A dual battery system is introduced, comprising a first high voltage battery fixed to the vehicle and a second high voltage battery that can be attached or detached, with a controller that selects and controls battery usage based on driving areas, operation points, and driver habits to optimize power distribution and minimize current usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a single high voltage battery is used in electric vehicles, then the battery system is simple and reliable, but the driving range is limited and battery capacity is insufficient
Solution Approach 1:
The battery system is segmented into a first high voltage battery and a second high voltage battery, allowing the vehicle to extend its driving range by utilizing both batteries when needed. The second battery can be detached and attached as required, providing extended capacity without permanently increasing system complexity.
Solution Approach 2:
The second high voltage battery serves multiple functions: it can be attached to extend driving range for long-distance trips, detached to reduce weight for short-distance travel, and used to balance usage between batteries to extend overall system lifespan. This multi-functionality resolves the contradiction between extended range and system simplicity.
2Adaptability or versatility
If the high voltage battery is fixed to the vehicle, then the battery system is stable and reliable, but the adaptability to different driving conditions is poor
Solution Approach 1:
The battery system transitions from a fixed configuration to a dynamic one where the second high voltage battery can be attached or detached based on driving conditions. The controller dynamically selects which battery to use based on real-time operating parameters such as state of charge, temperature, and power demand, allowing adaptation to different driving scenarios while maintaining system reliability through controlled transitions.
3Use of energy by moving object
If batteries are used without optimization strategy, then the system is simple to operate, but power loss is high and energy efficiency is poor
Solution Approach 1:
The controller implements a feedback mechanism that continuously monitors the operating state of both batteries and the driving motor, then selects the optimal battery based on real-time conditions. The controller determines an operation point of the driving motor and compares it with reference values to decide which battery should be used, ensuring optimal energy efficiency while managing complexity through automated decision-making.
Solution Approach 2:
The system changes operational parameters by selecting different batteries based on the driving motor's operation point and reference power levels. The controller adjusts which battery is active based on parameters such as state of charge, temperature, and power demand, optimizing energy efficiency without requiring complex manual intervention.
4Length of moving object
If a second high voltage battery is added to extend driving range, then the driving range is improved, but the device complexity and system cost increase
Solution Approach 1:
The battery system is divided into a primary first high voltage battery and an optional second high voltage battery. The second battery serves as an extendable module that can be attached when additional range is needed and detached when not required, providing range extension capability without permanently complicating the system architecture.
Solution Approach 2:
The second high voltage battery can be detached and removed from the system when its extended capacity is no longer needed, allowing the vehicle to operate with a simpler single-battery configuration for short-distance travel. This recoverable approach to capacity extension minimizes permanent system complexity while maintaining the option for extended range when required.
Data Source
AI summary
A method of controlling a battery of a vehicle is provided. The vehicle includes a driving motor for providing a driving force to a wheel. The method includes selecting, by a controller, a battery among a first battery and a second battery based on a plurality of driving areas and operation points for the driving motor. The method also includes controlling, by the controller, the use of the selected battery to supply power to the driving motor of the vehicle. Selecting the battery includes classifying the plurality of driving areas according to a reference power.