Voltage Feed-Forward Control for Battery Backup Power Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional power systems with distributed UPS fail to manage backup power effectively, leading to unnecessary drainage of weaker backup power sources and inadequate power delivery due to the need for other sources to compensate, resulting in reduced reliability.
Innovation Solution
Implementing voltage feed-forward control in backup converters to regulate output current based on battery voltage, allowing weaker batteries to deliver less current and prevent over-drainage by varying power contribution among batteries in a distributed architecture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If uniform power distribution is implemented among multiple backup power sources in parallel, then each backup power source can initially provide equal power to the load, but weaker backup power sources become completely drained and shut off output, causing remaining sources to produce higher current and reducing overall power delivery duration
Solution Approach 1:
The system dynamically changes the operating parameters of each backup power source by adjusting output current levels based on real-time voltage measurements. Weaker batteries (with lower voltage) are assigned lower current levels, while stronger batteries (with higher voltage) provide higher current levels, optimizing the overall system performance and preventing premature exhaustion of weaker sources
Solution Approach 2:
The control device continuously monitors the voltage output of each backup power source and uses this feedback information to adjust the current distribution. This closed-loop control ensures that each battery operates within its capability limits, preventing weaker batteries from being over-drained while maximizing the contribution of stronger batteries
2Productivity
If weaker backup power sources are allowed to continue providing uniform power output, then initial power distribution remains balanced, but they become completely drained faster, necessitating other sources to compensate with higher current
Solution Approach 1:
The system implements dynamic parameter adjustment by setting different current levels for each backup power source based on their voltage characteristics. This ensures that weaker batteries contribute proportionally less current, extending their operational duration while stronger batteries compensate to maintain overall power delivery
3Device complexity
If output current level is not controlled based on battery voltage, then backup power sources operate independently, but weaker sources drain completely and remaining sources cannot sustain adequate power delivery
Solution Approach 1:
The control device implements a feedback mechanism that monitors battery voltage and adjusts current output accordingly. This ensures coordinated operation of all backup power sources, preventing complete drainage of weaker batteries while maintaining reliable power delivery to the load throughout the backup period
Data Source
AI summary
The subject innovation relates to providing battery backup for a power supply (e.g., a power supply implemented within a distributed power architecture where multiple power supplies are coupled together) based at least in part on voltage feed-forward control. A backup converter is coupled to a battery and a primary power converter. The backup converter delivers power from the battery to a load when a primary power failure is detected in the primary power converter. A controller controls an output current level of the backup converter based on an output voltage level of the battery.