Wireless Power Transfer Control for Multiple Vehicle Coils
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Solution Overview
Problem
Existing wireless power transfer systems are not capable of efficiently charging multiple power receiving devices on a vehicle, as they primarily focus on the type of power receiving coil rather than the number and kind of coils present, leading to inadequate charging performance.
Innovation Solution
A wireless power transfer system that includes a processor to acquire information about the power transferring and receiving devices, as well as the vehicle's battery state, to determine the optimal power supply based on the positional relationship between the devices, allowing for appropriate charging according to the type and number of power receiving coils on the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control is performed based only on the type of power receiving coil, then the control system remains simple, but charging performance becomes inadequate when multiple power receiving devices are present
Solution Approach 1:
The control device receives information from each power receiving device including identification information and power reception capability information. Based on this feedback, the controller dynamically determines the number of power transmitting coils to activate and adjusts power transmission accordingly, enabling adaptive control that improves charging performance while managing system complexity through structured information exchange
Solution Approach 2:
The system transitions from static control based solely on coil type to dynamic control that adapts to the actual number and configuration of power receiving devices present. The controller can flexibly adjust the number of active power transmitting coils and power distribution based on real-time device detection and capability assessment
2Power
If the number of power transmitting coils is increased to charge multiple power receiving devices, then charging capacity improves, but power loss increases
Solution Approach 1:
The system activates only the necessary number of power transmitting coils based on the actual number of power receiving devices detected. Each power transmitting coil is selectively engaged or disengaged according to local charging needs, avoiding the energy waste of operating excess coils while maintaining sufficient charging capacity
Solution Approach 2:
The controller dynamically changes operational parameters including the number of active power transmitting coils and power distribution levels based on detected device count and power reception capabilities. This parameter adaptation optimizes the balance between charging capacity and energy efficiency by matching supply to actual demand
3Productivity
If power is supplied without considering positional relationship, then power supply is simple, but charging efficiency decreases
Solution Approach 1:
The control device performs preliminary detection and identification of power receiving devices before initiating power transmission. By acquiring information about device count, type, and power reception capability in advance, the system can pre-determine the optimal configuration of power transmitting coils and power distribution strategy, improving charging efficiency without complex real-time adjustments
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 efficient and appropriate charging of vehicles with multiple power receiving coils by determining the correct power supply based on the type and number of coils, ensuring maximum power transfer while preventing overcharging and optimizing magnetic coupling.
Implementation Method 1
transfer power in a non-contact manner from a supply device on a road side to a vehicle
Data Source
AI summary
The power transmission electronic control unit includes power transmission device information related to the power transmission device of the supply device, power reception device information related to one or more power reception devices provided in the vehicle, state information related to the state of the battery of the vehicle, and determines the amount of electric power to be supplied to the vehicle based on the positional relationship between the power transmitting device and the power receiving device based on the power transmitting device information, the power receiving device information, and the state information.