Time-Shared Power Management Circuit for Expandable EV Batteries
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Solution Overview
Problem
Current electric auxiliary vehicles lack expandable batteries and do not provide expanded energy transmission technology.
Innovation Solution
A power management circuit with multiple primary circuits, a transformer, an inductor, motor driving circuit, and charging-and-discharging circuits that transmit electric energy in a time-sharing manner, allowing for expanded battery capacity and multiple power transmission functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current electric auxiliary vehicles use fixed battery capacity, then device complexity is reduced, but battery expandability and energy transmission versatility are limited
Solution Approach 1:
The power management circuit is divided into multiple independent primary circuits (first, second, third primary circuits) that can independently manage different batteries. Each primary circuit includes its own switching elements and control logic, allowing batteries to be independently charged, discharged, or expanded without affecting other battery units.
Solution Approach 2:
The power management circuit is designed with multi-functional capability to handle various operations including wireless charging, wired charging, motor driving, and energy feedback to the grid. The same circuit infrastructure supports both single-battery and multi-battery configurations, providing universal adaptability across different operating modes.
2Quantity of substance
If multiple batteries are managed simultaneously, then battery capacity is expanded, but energy transmission efficiency decreases due to time-sharing mechanism
Solution Approach 1:
The power management circuit implements periodic time-sharing control where different primary circuits are activated in alternating time slots. The control unit switches between first, second, and third primary circuits periodically, allowing each battery to receive dedicated energy transmission during its assigned time period while maintaining overall system efficiency.
Solution Approach 2:
The time-sharing mechanism ensures continuous useful action by seamlessly transitioning between different primary circuits without idle gaps. While one primary circuit is active, others are in standby or charging mode, ensuring that the overall system maintains continuous energy management across all batteries.
3Adaptability or versatility
If time-sharing mechanism is used for multiple primary circuits, then battery expandability is achieved, but power transmission speed is reduced
Solution Approach 1:
The system dynamically adjusts the time-sharing allocation between different primary circuits based on real-time battery status, power demand, and charging/discharging requirements. The control unit can optimize the time slot distribution to prioritize high-power transmission when needed while maintaining multi-battery support capability.
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
Enables expanded battery capacity and efficient energy transmission, including wireless charging, energy feedback, and motor driving using a time-sharing mechanism.
Implementation Method 1
The transformer includes a plurality of primary windings and a secondary winding
Implementation Method 2
The inductor is coupled in parallel with the secondary winding
Implementation Method 3
The motor driving circuit uses electric energy of the inductor to drive the motor
Data Source
AI summary
A power management circuit for an electric auxiliary vehicle is provided. The electric auxiliary vehicle includes batteries, a motor, and power receiving ports. The power management circuit includes a transformer, an inductor, primary circuits, a motor driving circuit, and charging-and-discharging circuits. The transformer includes primary windings and a secondary winding. The inductor is coupled in parallel with the secondary winding. Each of the primary circuits provides wireless power from a corresponding power receiving port to a corresponding primary winding at different time periods, and provides electric energy from the corresponding primary winding to the corresponding power receiving port at different time periods. Each of the charging-and-discharging circuits provides electric energy from the inductor to a corresponding battery at different time periods, and provides battery electric energy from the corresponding battery to the inductor at different time periods.