Battery Charger Voltage Negotiation for Stable Quick Charging
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Solution Overview
Problem
Existing lithium-ion battery charging methods, such as the Constant Current (CC)-Constant Voltage (CV) scheme, face inefficiencies in quick charging, leading to increased power losses and unstable voltage levels, particularly when using standard Travel Adapters (TAs) that require high-rated currents.
Innovation Solution
A method and apparatus for battery charging that involves detecting a connection with a charger, negotiating a voltage-current pair using a quick charge interface, and adjusting the charging parameters to match the device's rated power, including clock synchronization and error detection for efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Constant Current-Constant Voltage (CC-CV) charging scheme is used, then battery charging is performed with stable control, but power losses increase and voltage levels become unstable during quick charging
Solution Approach 1:
The patent implements dynamic charging parameter adjustment by negotiating voltage-current pairs between the electronic device and power supplier in real-time. Instead of fixed CC-CV stages, the system continuously adapts charging parameters based on battery state and power supply capabilities, resolving the contradiction between stability and energy efficiency during quick charging.
Solution Approach 2:
The patent changes the charging approach by transitioning from fixed voltage/current stages to dynamic parameter negotiation. The system exchanges capability information and negotiates optimal voltage-current pairs, allowing continuous parameter adjustment that reduces power losses while maintaining charging stability.
2Productivity
If high rated current is used with standard Travel Adapter (5V fixed voltage), then high capacity charging is achieved, but power losses increase and input power for charging is reduced
Solution Approach 1:
The patent changes the fixed 5V voltage parameter to a negotiable voltage level. By dynamically adjusting voltage and current parameters based on negotiated capabilities rather than using fixed high current at 5V, the system achieves high charging capacity while reducing power losses through optimized parameter selection.
Solution Approach 2:
The patent makes the charging parameters dynamic through real-time negotiation between device and power supplier. Instead of static high current mode, the system adapts voltage and current levels during charging based on actual conditions, maintaining high productivity while reducing energy losses.
3Speed
If quick charging is implemented with high capacity charges, then charging speed increases, but voltage levels become unstable and power losses increase
Solution Approach 1:
The patent implements feedback mechanisms through capability negotiation and status exchange between electronic device and power supplier. The system continuously monitors and adjusts charging parameters based on feedback information, maintaining voltage stability while achieving quick charging through coordinated parameter control.
Solution Approach 2:
The patent uses dynamic parameter adjustment during quick charging. By negotiating and adapting voltage-current pairs in real-time based on battery state and power supply capabilities, the system achieves high charging speed while maintaining voltage stability through continuous control optimization.
Data Source
AI summary
A method is provided comprising: detecting a connection between an electronic device and a battery charger; transmitting to the battery charger a first request for at least one of a first voltage level and a first current level; receiving from the battery charger a signal; and charging a battery of the electronic device with the signal.