Dual-Battery Conditioning Control for EV Range and Battery Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electric vehicles with a single battery system face challenges in battery life due to risks such as excessive temperature, low temperature, overcharge, and over-discharge, which can shorten battery life and decrease performance.
Innovation Solution
The implementation of a dual battery system with a first high voltage battery already installed in the electric vehicle and a second high voltage battery that can be attached and detached, along with a method for performing conditioning control based on the states of both batteries to mitigate risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a dual battery system is implemented to extend driving range, then the driving range and usability are improved, but the complexity of battery conditioning control increases and risks of overcharge/over-discharge arise
Solution Approach 1:
A DC/DC converter is introduced as an intermediary device between the first high voltage battery and the second high voltage battery. This converter manages power flow and voltage conversion, enabling safe charging/discharging operations while isolating the complexity of dual-battery management from the control system.
Solution Approach 2:
The controller continuously monitors the states (charge levels, temperatures) of both batteries and dynamically adjusts conditioning control strategies. Based on real-time state assessment, the controller determines prioritized modes for battery conditioning, creating a closed-loop feedback system that manages complexity through adaptive control.
2Length of moving object
If a dual battery system is implemented to extend driving range, then the driving range is improved, but the risks of excessive temperature, low temperature, overcharge, and over-discharge increase
Solution Approach 1:
The controller performs preliminary assessment of battery states before initiating any conditioning operations. By evaluating temperature, charge levels, and overall battery health in advance, the system prevents harmful conditions like overcharge, over-discharge, and extreme temperatures before they occur.
Solution Approach 2:
The system implements protective control strategies that cushion against potential harmful effects. The controller monitors battery states and applies preventive measures (such as limiting charge rates or activating thermal management) before dangerous conditions develop, thereby protecting battery life and safety.
3Ease of operation
If conventional single battery conditioning control is used, then the control simplicity is maintained, but the battery life is shortened due to unmitigated risks
Solution Approach 1:
The dual battery system with DC/DC converter enables self-service functionality where one battery can charge the other based on their respective states. This automatic inter-battery charging reduces the need for complex external management while extending operational life by optimizing charge distribution.
Data Source
AI summary
An embodiment mobility apparatus includes a plurality of wheels, at least one driving motor configured to provide driving force to the wheels, a first battery configured to supply power to the at least one driving motor, and a controller configured to control the at least one driving motor and the first battery, wherein, in a state in which a second battery is detachably electrically connected to the first battery through a DC/DC converter, the controller is configured to perform a prioritized mode among a plurality of modes for battery conditioning control to be performed first based on states of the first battery and the second battery to carry out the battery conditioning control.