Multi-Stage DC/DC Converter Layout for Variable-Voltage Energy Storage
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Solution Overview
Problem
Conventional electrical energy storage systems are inflexible and cannot support different voltage levels from power generation systems, limiting their application flexibility and production efficiency.
Innovation Solution
The electrical energy storage system incorporates two types of DC/DC converters, where N second DC/DC converters are disposed between the power generation system and the first DC/DC converters, enabling voltage conversion to adapt to different voltage levels, thereby supporting various voltage levels from the power generation system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the input voltage range of the DC/DC converter is designed to match a specific voltage level of the power generation system, then the converter can operate efficiently at that voltage level, but it cannot support other voltage levels, reducing application flexibility
Solution Approach 1:
The DC/DC converter system is divided into multiple independent converter modules, each designed to handle specific voltage level conversions. This segmentation allows the system to support multiple voltage levels by activating only the necessary converter modules for each operating condition, rather than requiring a single complex converter to handle all voltage levels.
Solution Approach 2:
The converter system is designed with multi-functional capability by incorporating multiple converter modules that can be selectively activated. Each module serves a specific voltage conversion function, and the system as a whole can adapt to different voltage levels by combining or selecting appropriate modules, achieving universal compatibility across multiple voltage standards.
2Reliability
If different DC/DC converters are designed for different voltage levels, then each converter can be optimized for its specific voltage level, but the system requires multiple converter types, increasing device complexity
Solution Approach 1:
The converter system employs dynamic configuration where converter modules can be selectively activated or deactivated based on the operating voltage level requirements. This dynamic approach allows the system to maintain optimal performance for each voltage level while minimizing the number of actively used converter modules at any given time, reducing effective complexity during operation.
Solution Approach 2:
The system introduces a control mechanism that acts as an intermediary to manage the selection and coordination of different converter modules. This mediator ensures reliable voltage conversion by automatically selecting the appropriate converter module based on the current voltage level requirements, maintaining system reliability while simplifying the operational complexity through automated management.
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 enhances the application flexibility of the electrical energy storage system by allowing it to adapt to different voltage levels, improving production efficiency by enabling the use of a unified standard for producing systems corresponding to various power generation systems.
Implementation Method 1
the second DC/DC converter may be configured to perform voltage conversion on a voltage input by the power generation system, so that an output voltage adapts to the input voltage range of the first DC/DC converter
Data Source
AI summary
An electrical energy storage system is provided in this disclosure, which includes: M battery packs; M first DC/DC converters, where first terminals of the M first DC/DC converters are respectively connected to the M battery packs, the M first DC/DC converters are classified into N first DC/DC converter sets; and N second DC/DC converters, where the N second DC/DC converters one-to-one correspond to the N first DC/DC converter sets, a first terminal of each second DC/DC converter is connected to second terminals of all first DC/DC converters in a first DC/DC converter set corresponding to the second DC/DC converter, a second terminal of each second DC/DC converter is connected to a first interface of the electrical energy storage system, the first interface is to receive a direct current from a power generation system or output a direct current to the power generation system.