UPS Power Supply Circuit With Dual-Bus Battery Sharing
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Solution Overview
Problem
Existing UPS systems require a redundant backup power supply configuration, leading to a large number of battery banks needed to match the number of inverters, resulting in increased costs and complexity.
Innovation Solution
The implementation of a power supply circuit with a first and second bus, where each bus is connected to a power conversion module and a battery bank, allowing for DC/DC conversion and aggregation of electric energy from multiple battery banks, thereby reducing the number of battery banks required and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a redundant backup power supply configuration is used with one battery bank per inverter, then power supply reliability is improved, but the quantity of battery banks increases and costs increase
Solution Approach 1:
Multiple battery banks are merged through parallel connection via the first bus, allowing them to function as a unified power source. This consolidation enables fewer battery banks to support the same number of inverters, reducing component quantity while maintaining redundancy and reliability through shared power distribution.
Solution Approach 2:
The first bus serves multiple functions: it aggregates power from multiple battery banks, distributes power to multiple inverters, and provides redundant pathways for power flow. This multi-functionality allows a single bus structure to replace what would traditionally require multiple dedicated battery-inverter pairs, reducing the overall quantity of battery banks needed.
2Ease of operation
If one battery bank is assigned to each inverter, then power distribution is simplified, but device complexity increases due to the large number of battery banks
Solution Approach 1:
The power distribution system is segmented into modular components: multiple battery banks connect to the first bus, which then distributes power to multiple inverters. This segmentation creates a scalable architecture where adding or removing battery banks or inverters does not require reconfiguring the entire system, simplifying power distribution while managing complexity through standardized interfaces.
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 reduces the number of battery banks needed, lowering costs while improving power supply reliability by allowing either bus to provide power in case of a fault, ensuring continuous operation.
Implementation Method 1
the first power conversion module is configured to: perform direct current to direct current (DC/DC) conversion on a current output by the battery bank, and output currents to the first bus and the second bus
Data Source
AI summary
Embodiments of this application provide a power supply circuit, including a first power conversion module, a plurality of battery banks, a first bus, and a second bus. A first wiring terminal of the first power conversion module is connected to the battery bank, a second wiring terminal of the first power conversion module is connected to the first bus and the second bus, and the first power conversion module is configured to: perform direct current to direct current (DC/DC) conversion on a current output by a corresponding battery bank, and output currents to the first bus and the second bus. In this application, a quantity of battery banks are set to be less than a quantity of inverters in a UPS system, so that costs are reduced.