Dual Battery Control Using Driver Habits for EV Range Extension
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Solution Overview
Problem
The fixedly mounted high-voltage battery in electric vehicles may not be sufficient for extended driving distances, necessitating an alternative solution to enhance battery efficiency and usability.
Innovation Solution
A dual battery system is introduced, comprising a first high-voltage battery fixedly mounted in the vehicle and a second high-voltage battery that can be added or detached, with a controller determining use plans based on driver habits and driving situations to optimize energy efficiency through conditioning control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a single fixedly mounted high-voltage battery is used in the vehicle, then the battery system structure is simple and reliable, but the driving distance is insufficient and battery capacity cannot be extended
Solution Approach 1:
The battery system is divided into a first high-voltage battery fixedly mounted in the vehicle and a second high-voltage battery that can be added or detached. This segmentation allows the system to provide extended driving distance when the second battery is attached, while maintaining structural simplicity when only the first battery is used.
Solution Approach 2:
The battery system transitions from a static single-battery configuration to a dynamic dual-battery configuration. The controller determines whether to use the first battery alone or both batteries together based on driving situations, making the system adaptable to different driving distance requirements.
2Duration of action of moving object
If a dual battery system is added to extend driving distance, then battery capacity and driving distance are improved, but the system complexity and control difficulty increase
Solution Approach 1:
The controller performs preliminary determination of battery use plans based on predicted driving situations before actual battery operation. Conditioning control is executed in advance to prepare the second battery for optimal performance, reducing the complexity of real-time control decisions.
Solution Approach 2:
The controller continuously monitors driving situations and battery states, using feedback to dynamically adjust battery usage strategies. This feedback mechanism simplifies control by automatically adapting to changing conditions rather than requiring complex pre-programmed control sequences.
3Use of energy by moving object
If the second high-voltage battery is used without conditioning control, then the system is simpler to operate, but energy efficiency is reduced and battery life is compromised
Solution Approach 1:
The battery system performs self-conditioning where the first battery conditions the second battery and vice versa, without requiring external intervention or complex user operations. This automatic conditioning maintains energy efficiency and battery life while keeping the system simple to operate.
Solution Approach 2:
Conditioning control is executed in advance before the second battery is put into service. This preliminary conditioning optimizes battery performance and extends battery life without requiring complex real-time control during actual battery operation.
4Reliability
If individual conditioning control is applied to each battery based on use plans, then battery life and energy efficiency are improved, but the control complexity increases
Solution Approach 1:
The controller adjusts conditioning parameters such as temperature, charge current, and voltage based on predicted driving situations and battery states. These parameter changes optimize battery life and energy efficiency while maintaining manageable control complexity through systematic parameter management.
Data Source
AI summary
A controlling method of a dual battery system for controlling a first battery and a second battery to supply power to a wheel driving motor in a vehicle includes: obtaining driving habit data of a driver for a discharging power of the driving motor or a charging power of the driving motor for one or more driving situations; determining at least one or more driving sections based on the one or more driving situations with respect to an expected driving route; determining an expected power based on the driving habit data with respect to each of the at least one or more driving sections; determining use plans of the first battery and the second battery based on an expected power corresponding to each of the at least one or more driving sections; and executing discharging or charging of the first battery and the second battery according to the use plans.