UPS Battery Bus Architecture for Fewer Banks and Backup Power
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Solution Overview
Problem
The high cost and redundancy of battery banks in uninterruptible power supply (UPS) systems due to the requirement of one battery bank per inverter, leading to increased costs and inefficient power distribution.
Innovation Solution
Implementing a power supply circuit with a first and second bus that aggregates electric energy from multiple battery banks, allowing for fewer battery banks than inverters, and enabling power distribution through DC/DC conversion and overcurrent protection to ensure reliable power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If one battery bank is assigned to each inverter for redundant backup, then power supply reliability is improved, but the quantity of battery banks increases leading to high costs
Solution Approach 1:
Multiple battery banks are connected in parallel to form a common battery bank that can supply power to multiple inverters. This merging approach reduces the total quantity of battery banks needed while maintaining redundant backup capability, as the common battery bank can serve multiple inverters simultaneously.
Solution Approach 2:
The common battery bank serves multiple inverters simultaneously, making it a universal power source that can back up any of the connected inverters. This multi-functional design eliminates the need for dedicated battery banks for each inverter, reducing overall battery bank quantity while maintaining reliability.
2Reliability
If multiple battery banks are used for each inverter, then power distribution redundancy is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges multiple battery banks into a single common battery bank configuration that serves multiple inverters. This simplifies the overall system architecture by reducing the number of separate battery bank-inverter pairs while maintaining the redundant backup capability through parallel connection and shared power distribution.
3Quantity of substance
If battery banks are connected in parallel to form common battery bank, then quantity of battery banks is reduced lowering costs, but power supply reliability may be compromised
Solution Approach 1:
Battery banks are connected in parallel to form a common battery bank, which reduces the total quantity of battery banks needed. The parallel connection maintains reliability because if one battery bank fails, others can continue to supply power through the shared bus bars to the inverters.
Solution Approach 2:
Bus bars serve as intermediaries that connect multiple battery banks in parallel and distribute power to multiple inverters. This intermediary structure enables the common battery bank configuration to maintain reliability by providing multiple pathways for power flow, so that failure of one battery bank does not affect the entire system.
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
Reduces the number of required battery banks, lowering costs while enhancing power supply reliability by allowing either bus to provide energy when faulty, ensuring continuous power to the load.
Implementation Method 1
a first power conversion module, a battery bank, a first bus, and a second bus. A first wiring terminal of the first power conversion module is connected to the battery bank, and a second wiring terminal of the first power conversion module is connected to the first bus and the second bus
Data Source
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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 may be set to be less than a quantity of inverters in a UPS system, so that costs are reduced. In addition, the first bus and the second bus are disposed, so that when either bus is faulty, electric energy can be provided for the inverter by using the other bus, and therefore power supply reliability of the UPS system is improved.