UPS Power Converter Switching for Integrated Battery Charging
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Solution Overview
Problem
Existing uninterruptible power supplies (UPS) face challenges in reducing costs and optimizing space while maintaining effective charging capabilities.
Innovation Solution
A power converter is designed with multiple power conversion modules and a switch module, allowing for selective electrical connections to mains supply and rechargeable battery, enabling efficient charging and rectification modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate charging module is added to improve charging capability, then charging performance is improved, but device complexity and cost increase
Solution Approach 1:
The power conversion module is designed to perform multiple functions: it can convert AC to DC for rectification and simultaneously charge the battery through the DC bus. By making the power conversion module universal, the patent eliminates the need for separate charging modules while maintaining effective charging capability, thus resolving the contradiction between charging performance and device complexity
Solution Approach 2:
The patent merges the charging function into the existing power conversion module by configuring the switch module to enable selective connection between the power conversion module and either the AC input or the battery. This consolidation reduces the number of separate modules needed in the system
2Reliability
If multiple separate modules are used for rectification and charging, then functional reliability is improved, but device volume and cost increase
Solution Approach 1:
The power conversion module serves dual purposes: rectifying AC power and charging the battery. This multi-functional design maintains functional reliability by ensuring both rectification and charging capabilities exist within the system while reducing the overall device volume by eliminating redundant modules
Solution Approach 2:
The patent combines the rectification and charging functions into a single integrated power conversion module, reducing device volume while maintaining the reliability of both functions through proper switch control and circuit configuration
3Productivity
If dedicated charging circuitry is added to improve charging speed, then charging efficiency is improved, but manufacturing cost increases
Solution Approach 1:
The power conversion module is designed to provide both rectification and charging functions using the same core components. By utilizing the existing power conversion capability for dual purposes, the system achieves effective charging speed without requiring additional dedicated charging circuitry, thereby controlling manufacturing costs
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
The power converter improves the charging capability of UPS systems, reduces costs, and optimizes space by integrating charging and rectification functions within a single module.
Implementation Method 1
an AC-DC conversion module (rectifier) that converts an alternating current into a direct current
Implementation Method 2
a DC-AC conversion module (inverter) that converts a direct current into an alternating current
Implementation Method 3
a backup power supply (e.g., a rechargeable battery)
Data Source
AI summary
A power converter and a UPS including the same are provided. The power converter includes: a first power conversion module including a first and a second bridge arms, and a second power conversion module including a third and a fourth bridge arms, where first terminals of the first and second power conversion modules are configured to be capable of being electrically connected to a mains supply and/or a rechargeable battery, and second terminals are configured to be capable of being electrically connected to a DC bus; and a switch module, configured to enable the first terminals of the first and second power conversion modules to be selectively electrically connected to the mains supply and/or the rechargeable battery, where the first and second power conversion modules, and the switch module are configured to charge the rechargeable battery from the DC bus through the first and fourth bridge arms.