Auxiliary Power Supply Mode Switching for EV Energy Efficiency
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Solution Overview
Problem
In electric vehicles, the main power supply often outputs more power than required by the drive motor, leading to increased power consumption and inefficient energy use, as existing systems lack measures to reduce this consumption effectively.
Innovation Solution
An auxiliary power supply device is introduced, which includes an auxiliary power supply and a control unit that switches between output and non-output modes based on the required power value, allowing the auxiliary power supply to supplement the main power supply only when necessary, and also functions as a charging path, reducing overall power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the main power supply outputs electric power to the drive motor, then the electric vehicle can travel, but power consumption in the main power supply increases when the output power exceeds the required power
Solution Approach 1:
The power supply system is segmented into two independent power supplies (main power supply and auxiliary power supply) that can operate independently or in combination. The auxiliary power supply specifically addresses peak power demands, allowing the main power supply to operate at optimal power levels and reduce overall power consumption.
Solution Approach 2:
The auxiliary power supply is designed to perform multiple functions: it can output power to the drive motor during high power demand periods, and it can be charged from the main power supply during low power demand periods. This multi-functionality allows the system to adapt to varying power requirements and improve overall energy efficiency.
2Use of energy by moving object
If the auxiliary power supply outputs electric power to supplement the main power supply, then power consumption in the main power supply is reduced, but the device complexity increases
Solution Approach 1:
The control unit integrates the control of both power supplies into a single device that manages power distribution dynamically. By merging the control functions and using a unified control strategy, the system reduces the complexity that would otherwise arise from separate control mechanisms for each power supply.
Solution Approach 2:
The system automatically manages its own power distribution and charging operations through the control unit, which monitors power requirements and dynamically switches between power supply modes without external intervention. This self-service capability simplifies the overall system architecture by eliminating the need for complex external control systems.
Data Source
AI summary
An auxiliary power supply device includes an auxiliary power supply; and an auxiliary power supply control unit configured to switch a mode of the auxiliary power supply to an output mode or a non-output mode when electric power is output from a main power supply to a drive motor. The auxiliary power supply control unit is configured to switch the mode to the non-output mode when a required power value required by the drive motor is equal to or smaller than a predetermined power value and to switch the mode to the output mode when the required power value is larger than the predetermined power value, the predetermined power value being set to a value smaller than outputtable electric power that is electric power outputtable from the main power supply.