Battery Rack Auxiliary Power Integration for Simpler BMS Supply
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Solution Overview
Problem
Conventional power conversion systems have a complex architecture due to the presence of a separate switch box and auxiliary power supply for the battery management system, which occupies space and does not simplify the system design.
Innovation Solution
A power conversion system with an integrated battery management system and an auxiliary power supply that obtains power directly from the battery rack, eliminating the need for a separate auxiliary power supply for the battery rack and reducing hardware components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate switch box with auxiliary power supply is used for the battery management system, then the battery management system can operate reliably, but the system architecture becomes complex and occupies more space
Solution Approach 1:
The patent merges the auxiliary power supply function into the existing power conversion system by connecting the auxiliary power supply input terminal to the direct current side of the power conversion system. This integration eliminates the need for a separate switch box with its own auxiliary power supply, thereby simplifying the system architecture while maintaining continuous power supply to the battery management system.
2Reliability
If a separate switch box with auxiliary power supply is used for the battery management system, then the battery management system can operate reliably, but the system occupies more space
Solution Approach 1:
The patent merges the auxiliary power supply function into the existing power conversion system, eliminating the need for a separate switch box. This integration reduces the overall space occupation of the system while ensuring continuous power supply to the battery management system through the integrated auxiliary power supply.
3Adaptability or versatility
If multiple auxiliary power supplies are used (one for battery rack and one for power conversion system), then each component can be independently powered, but the number of hardware components increases
Solution Approach 1:
The patent makes the auxiliary power supply in the power conversion system serve multiple functions: it powers both the battery management system and the load in the power conversion system. By connecting the auxiliary power supply input terminal to the direct current side of the power conversion system, a single auxiliary power supply unit performs the work of what would traditionally require multiple separate power supply components.
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 configuration simplifies the hardware architecture, reduces the number of devices, and minimizes space usage, while ensuring continuous power supply to the battery management system, thereby enhancing system reliability and reducing costs.
Implementation Method 1
The auxiliary power supply is configured to obtain power from the battery rack, convert the power obtained from the battery rack, and supply power to the battery management system and a load in the power conversion system
Data Source
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AI summary
A power conversion system, an energy storage system and a power supply method are provided. The power conversion system includes a battery management system and an auxiliary power supply. A positive electrode of the auxiliary power supply is connected to a positive electrode of a battery rack. The auxiliary power supply is configured to obtain power from the battery rack, convert the power obtained from the battery rack, and supply the converted power to the battery management system and a load in the power conversion system. The battery management system is configured to sample a voltage of the battery rack and a current of the battery rack, and control charging and discharging of the battery rack based on the voltage and the current.