EV Endurance Mode Power Control for Consistent Race Performance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electric vehicles face performance inconsistencies during races due to the electrical power source's inability to meet demand, leading to slower speeds and potential race completion issues.
Innovation Solution
A system that allows drivers to switch between an endurance mode and a qualify mode, controlling electrical power supply to maintain consistent performance by limiting power availability in endurance mode and maximizing it in qualify mode, using a mode controller and supply controller to manage power based on predicted heat generation and driver inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the electrical power source supplies maximum power to meet high demand during racing, then the upper range of performance can be reached, but the performance becomes inconsistent and the power source may be drained
Solution Approach 1:
The system dynamically adjusts the electrical power supply based on real-time conditions during racing. The mode controller switches between qualify mode (maximum power) and endurance mode (limited power) depending on race circumstances, making the power supply adaptive rather than static. This resolves the contradiction by allowing maximum power when needed while maintaining consistency through controlled limitation during endurance mode.
Solution Approach 2:
The system changes the power supply parameter based on the selected mode. In qualify mode, the power parameter is set to maximum to achieve upper range performance. In endurance mode, the power parameter is limited to maintain consistency. This parameter adjustment strategy allows the system to optimize between power availability and performance consistency depending on racing needs.
2Reliability
If the electrical power source is limited to maintain consistent performance, then performance consistency is improved, but the upper range of performance cannot be reached
Solution Approach 1:
The dynamic mode switching allows the system to transition between limited power (endurance mode for consistency) and maximum power (qualify mode for peak performance). This resolves the contradiction by making the power limitation conditional rather than absolute, allowing the system to achieve consistency when needed while still accessing upper range performance when circumstances require it.
Solution Approach 2:
The system applies partial power limitation in endurance mode rather than complete restriction. This partial action maintains enough power to achieve consistent performance while conserving the electrical power source. When qualify mode is selected, the limitation is removed entirely to allow excessive power delivery for peak performance bursts.
3Speed
If maximum power is supplied to achieve fastest times, then speed is improved, but the electrical power source may be unable to keep up resulting in inconsistent performance
Solution Approach 1:
The system dynamically controls power supply based on racing phase and conditions. During qualify mode, maximum power enables fastest speeds. During endurance mode, limited power maintains consistent performance. This dynamic adaptation resolves the contradiction by matching power supply to racing objectives rather than maintaining a fixed power level.
Solution Approach 2:
The driver can pre-select the desired mode (endurance or qualify) before racing conditions require it. This preliminary action allows strategic planning of power usage, ensuring that maximum power is reserved for situations where speed is critical while maintaining consistency during phases where conservation is prioritized.
Data Source
AI summary
A system for mode selective control of an electric vehicle during a race. The system may include a demand controller configured for determining a demand made by a driver during the race to control a propulsion system to propel the vehicle, a battery controller configured for determining a supply of electrical power available from a rechargeable energy storage system (RESS) to meet the demand, a temperature controller configured for determining temperature thresholds for the RESS and the propulsion system, and a supply controller configured for controlling use of the supply according to an endurance mode and a qualify mode.