Modular Battery Modules With Shared BMS for Flexible Voltage Capacity
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Solution Overview
Problem
Large-scale energy storage systems are bulky, heavy, difficult to transport, and inflexible, with limited adaptability for different applications, and often require complex assembly.
Innovation Solution
A battery system comprising a first battery module with a battery management system and cells, and second battery modules with more cells but no management system, allowing for modular design with same-sized housings to achieve varying voltage capacities, enabling easy transport and assembly, and flexible power connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If large-scale energy storage systems are designed with fixed architecture and single application, then voltage capacity specification is determined, but adaptability for other uses is reduced
Solution Approach 1:
The battery system is divided into a first battery module containing a battery management system and multiple second battery modules without management systems. This segmentation allows the BMS to manage multiple modules uniformly, enabling flexible configuration for different voltage capacity requirements while simplifying the overall system architecture through standardized management interfaces.
Solution Approach 2:
The battery management system is designed to universally manage both the first battery module and multiple second battery modules through the same management interface. This universal management capability allows the system to adapt to different configurations and applications without requiring separate management systems, thereby improving versatility while maintaining manageable complexity.
2Quantity of substance
If container-type energy storage systems are designed for stable power supply, then large-scale battery capacity is achieved, but transportability and assembly convenience are reduced
Solution Approach 1:
The large-scale battery system is segmented into multiple modular units (first battery module and second battery modules) that can be independently handled, transported, and assembled. Each module contains a manageable number of battery cells, making them easier to transport and assemble while still achieving large-scale capacity when combined, directly addressing the contradiction between scale and assembly convenience.
3Volume of stationary object
If battery modules are designed with uniform housing sizes, then space utilization is optimized, but voltage capacity variation flexibility is reduced
Solution Approach 1:
While maintaining uniform housing sizes for optimal space utilization, the system achieves voltage capacity variation through local differences in the number of battery cells configured within each module type. The first battery module and second battery modules have different cell counts, allowing voltage capacity adaptation without changing the external housing dimensions, thus resolving the contradiction between space utilization and voltage adaptability.
Data Source
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AI summary
A battery system includes a first battery module and a plurality of second battery modules coupled to the first battery module. The first battery module includes a battery management system, and a plurality of first battery cells electrically coupled to each other. The first battery cells are electrically coupled to the battery management system to be managed by the battery management system. Each of the second battery modules includes a plurality of second battery cells electrically coupled to each other. The second battery cells are coupled to the battery management system of the first battery module to be managed by the battery management system. The battery management system is coupled to an external system to transmit signals with the external system.