USB Power Pack Control Using Battery-Aware PD Negotiation
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Solution Overview
Problem
Existing power delivery systems for electronic devices using USB connectors lack efficient and intelligent management of battery power delivery, leading to potential battery degradation and suboptimal performance.
Innovation Solution
A system comprising a USB port, battery module with configuration memory and voltage sensor, and a USB-PD controller that determines a maximum current discharge parameter based on battery module data to negotiate a power delivery contract and manage power delivery to external devices, optimizing battery usage and extending its lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional power delivery systems are used without intelligent management, then the system structure remains simple, but battery degradation occurs and performance is suboptimal
Solution Approach 1:
The system performs preliminary actions by determining the maximum current discharge parameter before power delivery begins. The USB-PD controller reads battery configuration data from memory, measures battery voltage, and calculates the maximum current discharge parameter based on these preliminary measurements, ensuring safe operation parameters are established before actual power delivery occurs.
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring battery voltage through the voltage sensor and using this feedback to determine the maximum current discharge parameter. The USB-PD controller uses the measured battery voltage and configuration data to dynamically adjust power delivery parameters, creating a closed-loop control system that adapts to real-time battery conditions.
2Productivity
If maximum power is delivered without intelligent management, then power delivery speed is maximized, but battery safety and longevity are compromised
Solution Approach 1:
The system applies dynamics by making the power delivery parameters adaptive rather than fixed. The USB-PD controller dynamically determines the maximum current discharge parameter based on real-time battery voltage measurements and configuration data. This dynamic adjustment allows the system to optimize power delivery speed while preventing battery degradation through intelligent parameter adaptation.
Solution Approach 2:
The system changes parameters by adjusting the maximum current discharge parameter based on battery conditions. Instead of using a fixed maximum current, the controller calculates the optimal current parameter based on measured battery voltage and stored configuration data, thereby changing the operational parameters to balance power delivery speed with battery safety and longevity.
3Measurement precision
If battery voltage is not monitored, then the system complexity is reduced, but accurate determination of discharge parameters cannot be achieved
Solution Approach 1:
The system implements self-service by having the battery module provide its own configuration data through stored parameters and enable self-monitoring through the voltage sensor. The USB-PD controller uses this self-provided information to autonomously determine the maximum current discharge parameter without requiring external intervention or complex external monitoring systems.
Data Source
AI summary
In an embodiment of the techniques presented herein, a system includes a universal serial bus (USB) port, a battery module, and a USB power delivery (USB-PD) controller. The battery module has a configuration memory configured to store battery module configuration data and a voltage sensor configured to generate a battery module voltage measurement. The USB-PD controller is configured to determine a maximum current discharge parameter based on the battery module voltage measurement and the battery module configuration data, determine a power delivery profile based on the maximum current discharge parameter, negotiate a power delivery contract with a device connected to the USB port based on the power delivery profile, and provide power from the battery module to the USB port based on the power delivery contract.