Wireless Charger Coil Coupling Control for Battery Balance
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Solution Overview
Problem
Existing non-contact battery charging technologies fail to balance power levels across multiple battery cells and maximize current transmission effectively during wireless charging.
Innovation Solution
A non-contact type charger and battery system that uses power transmitting and receiving coils with a power converting unit to control and adjust coupling coefficients, ensuring balanced charging across multiple battery cells by detecting and responding to power states and updating coupling coefficients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If non-contact power transmission is used to charge multiple battery cells, then power transmission efficiency is improved, but power balance between battery cells deteriorates
Solution Approach 1:
The battery pack is divided into multiple independently controllable battery cell groups, each with its own power receiving coil. The charger transmits power to each group separately through multiple power transmitting coils, allowing independent power control for each battery cell group while maintaining overall system efficiency.
Solution Approach 2:
The system dynamically adjusts the coupling coefficients between power transmitting coils and power receiving coils based on real-time battery cell states. The power converting unit continuously monitors and modifies transmission parameters to maintain power balance across all battery cells while optimizing transmission efficiency.
2Ease of operation
If non-contact power transmission is used, then charging convenience is improved, but control precision over individual battery cells deteriorates
Solution Approach 1:
The system implements bidirectional communication between the charger and battery pack, with the power converting unit continuously monitoring battery cell states and adjusting transmission parameters accordingly. This feedback mechanism enables precise control of individual battery cells while maintaining the convenience of non-contact charging.
Solution Approach 2:
The power converting unit performs multiple functions including power transmission, parameter detection, coupling coefficient adjustment, and battery cell monitoring. This multi-functionality allows the system to maintain both charging convenience and control precision through a single integrated device.
3Productivity
If multiple power transmitting coils are used to charge multiple battery cells, then charging speed is improved, but system complexity increases
Solution Approach 1:
Multiple power transmitting coils and power receiving coils are integrated into a unified modular architecture. The power converting unit serves as a central control hub that manages all coil pairs, reducing overall system complexity while enabling parallel charging of multiple battery cells to maintain high charging speed.
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
This solution enables efficient and balanced charging of multiple battery cells by dynamically adjusting power transmission based on coupling coefficients, maintaining power balance and maximizing current delivery.
Implementation Method 1
a plurality of power transmitting coils transmitting power in a non-contact manner
Implementation Method 2
a plurality of power receiving coils receiving the power transmitted by the plurality of power transmitting coils
Data Source
AI summary
A non-contact type power charger may include: a power transmitting device including a plurality of power transmitting coils transmitting power in a non-contact manner; and a power receiving device including a plurality of power receiving coils receiving the power in a non-contact manner to charge a plurality of battery cells, respectively connected to the plurality of power receiving coils, with the power, wherein the power transmitted to each of the plurality of power receiving coils is controlled depending on coupling coefficients between the plurality of power transmitting coils and the plurality of power receiving coils.