EV Battery Reserve Capacity Control for Emergency Range
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Solution Overview
Problem
Electrically powered vehicles face risks of immobilization due to limited battery capacity and inadequate charging infrastructure, leading to costly towing when charging stations are unavailable or insufficient.
Innovation Solution
A method that reserves additional capacity in the electrochemical energy store by switching off energy storage cells, determines predicted ranges based on route profiles and conditions, and releases this capacity when necessary to prevent range falls below a minimum, using a battery management system and sensors to manage voltage, current, and temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional capacity is reserved in the electrochemical energy store, then the vehicle can reach charging stations and avoid immobilization, but the available capacity for regular driving operation is reduced
Solution Approach 1:
The patent dynamically adjusts the additional capacity reservation based on real-time conditions. The control unit determines whether to reserve additional capacity by evaluating route profiles, charging station availability, weather conditions, and traffic situations. This dynamic adjustment allows the system to optimize between vehicle availability and available battery capacity depending on current operational context.
Solution Approach 2:
The system changes the operational parameters of the electrochemical energy store by selectively switching off specific energy storage cells to reserve additional capacity. This parameter change approach allows flexible adjustment of available capacity without permanently reducing the total battery capacity, enabling the vehicle to adapt to different driving scenarios and charging infrastructure conditions.
2Duration of action of moving object
If the additional capacity is released to increase available range, then the vehicle can operate longer without charging, but the risk of immobilization increases when charging stations are unavailable
Solution Approach 1:
The control unit continuously monitors multiple parameters including route profiles, charging station availability, weather conditions, traffic situations, and vehicle state. Based on this feedback, the system dynamically determines whether to reserve or release additional capacity, optimizing the balance between operating range and vehicle availability in real-time.
Solution Approach 2:
The system performs preliminary actions by reserving additional capacity in advance when charging infrastructure is unavailable or when route analysis predicts potential range issues. This proactive approach prevents immobilization before it occurs by ensuring sufficient capacity is available when needed.
3Reliability
If energy storage cells are switched off to reserve additional capacity, then the vehicle gains emergency range, but the device complexity increases due to cell management
Solution Approach 1:
The patent segments the electrochemical energy store into individual switchable energy storage cells. This segmentation allows the control unit to selectively switch off specific cells to reserve additional capacity while maintaining management of only the necessary subset of cells, rather than managing the entire battery system uniformly.
Solution Approach 2:
The control unit automatically manages the reservation and release of additional capacity based on pre-defined criteria and real-time conditions without requiring manual intervention. The system self-adjusts cell configuration to optimize between availability and range based on route profiles, charging station data, and vehicle state.
Data Source
AI summary
A method for providing an additional capacity of an electrochemical energy store of an electrically drivable vehicle.