Vehicle V2L Power Control Using Dynamic Safety SOC
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Solution Overview
Problem
Conventional vehicles with V2L technology fix the safety state of charge (SOC) value of the battery at a certain percentage, reducing battery utilization and user convenience due to inflexible power distribution between driving and external loads.
Innovation Solution
A vehicle system that adjusts the safety SOC value of the battery based on current location, driving patterns, road conditions, and weather, determining energy efficiency for each distance section to optimize power distribution and ensure safe travel to a charging station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the safety SOC value is fixed at a certain percentage, then the battery is ensured to have sufficient power for driving, but the battery utilization is reduced and user convenience deteriorates
Solution Approach 1:
The safety SOC value is transformed from a fixed parameter to a dynamic one that automatically adjusts based on real-time driving conditions. The controller calculates the safety SOC value by considering the distance to the nearest charging place and the vehicle's energy consumption characteristics, allowing the battery to discharge to optimized levels while ensuring sufficient power reaches the charging station.
Solution Approach 2:
The invention changes the parameter of safety SOC value from a static predetermined percentage to a dynamically calculated value based on multiple factors including distance to charging station, vehicle energy efficiency, and environmental conditions. This parameter transformation enables both improved battery utilization and maintained driving reliability.
2Reliability
If the safety SOC value is increased to ensure driving power, then driving reliability is improved, but the power available for external loads decreases
Solution Approach 1:
By dynamically adjusting the safety SOC value parameter based on actual driving conditions and distance to charging stations, the system optimizes the balance between power reserved for driving and power available for external loads, maximizing the usable capacity for both purposes simultaneously.
3Ease of operation
If the safety SOC value is decreased to allow more power for external loads, then user convenience is improved, but the risk of insufficient driving power increases
Solution Approach 1:
The system continuously monitors driving conditions, energy consumption rates, and distance to charging stations, using this feedback to dynamically recalculate and adjust the safety SOC value. This feedback mechanism ensures that the power allocation between driving and external loads remains optimal and safe under varying conditions.
Solution Approach 2:
The controller pre-calculates the required power for driving based on the distance to the nearest charging place and the vehicle's energy characteristics before allowing power discharge to external loads, ensuring that sufficient power is always reserved for completing the driving task.
4Device complexity
If a fixed safety SOC value is used, then the control system is simple, but the adaptability to different driving conditions and locations is poor
Solution Approach 1:
The control system transitions from using a fixed safety SOC value to a dynamic calculation approach that automatically adapts to different driving conditions, locations, and environmental factors, significantly improving versatility while maintaining reasonable system complexity.
Data Source
AI summary
A vehicle includes a battery, a converter connected to the battery and configured to provide electrical power of the battery to an external load, a navigation device configured to obtain current location information and charging place information, and a controller connected to the battery and the converter, and configured to control the battery and the converter. The controller is configured to determine a required energy of the vehicle to travel from a current location of the vehicle to a nearest charging place after end of driving and parking of the vehicle, determine a safety state of charge (SOC) value of the battery for ensuring driving of the vehicle to the nearest charging place based on the required energy and a total capacity of the battery, and control the converter to stop supplying power to the external load in response to an SOC of the battery reaches the safety SOC.