BMS Container Monitoring Power Conversion for Multi-Source Reliability
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Solution Overview
Problem
Existing energy storage systems face challenges in maintaining power supply reliability and efficiency for battery management systems, particularly in ensuring consistent battery states and preventing performance attenuation and safety issues.
Innovation Solution
The proposed energy storage system and power supply control method utilize multiple power supply devices to provide direct currents of different voltages to a container monitoring unit within the battery management system, enhancing charging efficiency and system stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single power supply device is used for the container monitoring unit, then the device complexity is reduced, but the power supply reliability deteriorates
Solution Approach 1:
The patent combines multiple power supply devices (first power supply device connected to AC mains module, second power supply device connected to energy storage converter module, third power supply device connected to DC bus) to supply power to the container monitoring unit. This merging of multiple power sources resolves the contradiction by improving power supply reliability while managing device complexity through a unified power conversion module that coordinates all inputs.
Solution Approach 2:
The power conversion module serves multiple functions: it converts AC voltage to DC voltage, converts energy storage converter output to appropriate voltage, converts DC bus voltage to appropriate voltage, and provides dual output voltages (first DC voltage and second DC voltage) to the container monitoring unit. This multi-functionality allows a single module to handle multiple power sources and output requirements, improving reliability without proportionally increasing complexity.
2Productivity
If only one DC voltage is supplied to the container monitoring unit, then the power supply system is simpler, but the charging efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts by providing two different DC voltages (first DC voltage and second DC voltage) to the container monitoring unit based on different power sources. The power conversion module can selectively convert from AC mains, energy storage converter, or DC bus depending on availability and requirements, enabling dynamic optimization of charging efficiency without requiring a completely complex reconfigurable system.
Solution Approach 2:
The power conversion module is segmented into multiple conversion paths: first power conversion circuit for AC to DC conversion, second power conversion circuit for energy storage converter output conversion, and third power conversion circuit for DC bus conversion. Each segment handles a specific input source and can operate independently, improving overall charging efficiency while keeping individual conversion circuits relatively simple.
3Speed
If multiple power supply devices are used for the container monitoring unit, then the charging speed is improved, but the system complexity increases
Solution Approach 1:
Multiple power supply devices are merged into a coordinated system where the power conversion module统一管理 all power inputs (AC mains, energy storage converter, DC bus) and outputs (first DC voltage, second DC voltage). This merging allows parallel power supply capability that increases charging speed while the unified control architecture prevents exponential growth in system complexity.
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 approach improves the reliability and stability of the energy storage system by ensuring efficient power supply to the container monitoring unit, enhancing charging speed and efficiency, and maintaining system stability through real-time parameter collection and data transmission.
Implementation Method 1
convert an alternating current voltage output by the alternating current mains module or an alternating current voltage output by the energy storage converter module into a first direct current voltage
Implementation Method 2
convert the second direct current voltage into a third direct current voltage and a fourth direct current voltage
Data Source
AI summary
An energy storage system includes a direct current bus, an energy storage module, an alternating current mains module, an energy storage converter module, a power conversion module, and a battery management system including a container monitoring unit. The power conversion module is configured to convert an alternating current voltage output by the alternating current mains module or an alternating current voltage output by the energy storage converter module into a first direct current voltage. The power conversion module uses, as a second direct current voltage, a maximum voltage among a direct current voltage output by the energy storage module, a bus voltage output by the direct current bus, and the first direct current voltage. The power conversion module then converts the second direct current voltage into a third direct current voltage and a fourth direct current voltage, and separately supply power to the container monitoring unit based on the third direct current voltage and the fourth direct current voltage.