BEV Battery Conditioning Control for Extreme Cold Drivability
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Solution Overview
Problem
Battery electric vehicles (BEVs) face limited power and range issues during extreme cold weather, leading to potential stranding and discomfort due to inadequate battery conditioning and heating systems, with conventional solutions providing unclear messaging and requiring manual instruction.
Innovation Solution
A battery control system with sensors monitoring battery parameters, a user interface, and a controller that communicates with sensors and interface to display clear messages about vehicle readiness, enabling cabin heating and defrosting, and allowing or preventing driving based on battery conditioning, with options for driver override and charging management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery system operates in extreme cold weather without sufficient conditioning, then the vehicle can start, but the power limits are very limited resulting in very limited range and potential stranding
Solution Approach 1:
The system performs preliminary battery conditioning by connecting the battery to the electrical system to power heating components before the vehicle is driven. This pre-heating of the battery in extreme cold weather improves its performance capacity and extends the driving range, preventing the limited range issue that would otherwise occur without sufficient conditioning.
2Use of energy by moving object
If power limits are limited during extreme cold weather, then battery consumption is reduced, but components such as battery heater and cabin heater/defroster cannot be used
Solution Approach 1:
The system enables cabin heating and defroster components by connecting the battery to the electrical system before the driver enters the vehicle. This preliminary action ensures that the cabin is warmed up in advance, providing comfort to the driver without requiring high power limits during actual driving, thus maintaining low battery consumption while ensuring ease of operation.
3Reliability
If conventional battery control systems are used, then the system works for its intended purpose, but the messaging to the driver about the state and future performance of the BEV is unclear
Solution Approach 1:
The system provides clear feedback messaging to the driver through the user interface, displaying the current state of the battery system and information about future performance. This feedback mechanism ensures that the driver understands the vehicle's condition and can make informed decisions, resolving the information clarity issue while maintaining system reliability.
4Reliability
If the vehicle prevents driving when battery parameters do not satisfy the threshold, then battery conditioning is ensured, but the driver experience is degraded with unclear messaging
Solution Approach 1:
The system provides clear feedback messaging to the driver when the vehicle prevents driving due to insufficient battery conditioning. The user interface displays understandable information about the current battery state and what actions the driver should take, improving the driver experience while ensuring proper battery conditioning is maintained.
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
Improves driver experience and safety by providing clear messaging and maintaining cabin comfort during battery conditioning, preventing stranding in extreme cold by ensuring the vehicle is ready for driving once sufficiently charged.
Implementation Method 1
connect the battery system to an electrical system of the vehicle to power at least a battery heater and a cabin heater/defroster
Data Source
AI summary
A battery control system for a battery electric vehicle is configured to detect that a driver door of the vehicle has been opened and connect the battery system to an electrical system of the vehicle to power at least a cabin heater and defroster of the vehicle, detect a driver start request, determine whether a set of battery parameters satisfy a threshold indicative of the battery system being sufficiently conditioned for driving of the vehicle, and when the set of battery parameters satisfy the threshold, display, via the user interface, a first message indicating that the vehicle is ready to drive and allow the driver to drive the vehicle and driving is prevented.