Battery BMS Daisy-Chain Communication for Low-Delay Scaling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing energy storage systems face increased transmission delays due to the growing number of battery racks and cells, limiting the scale of the battery system and data processing capacity, which is inadequate for modern safety and efficiency requirements.
Innovation Solution
The implementation of a daisy chain communication method using TCP/IP or UDP protocols between battery management systems, with assigned IDs and data zones within transmission frames, to enhance data transfer speed and reduce delays in collecting data from battery racks to the battery management system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of battery racks and cells is increased to expand system capacity, then the energy storage capacity increases, but transmission delay increases due to CAN communication limitations
Solution Approach 1:
The patent segments the battery management architecture into multiple BMS units, each managing a subset of battery racks. This segmentation allows parallel data collection and processing, reducing the overall transmission delay while maintaining expanded system capacity. Each BMS independently communicates with its assigned battery racks, preventing bottlenecks that would occur in a centralized system.
Solution Approach 2:
The patent introduces an intermediary communication layer using TCP/IP or UDP protocols between BMS units and the central controller. This intermediary protocol layer enables efficient data routing and aggregation, reducing transmission delays compared to direct CAN communication from all battery racks to the central controller.
2Reliability
If CAN communication is used for data transmission between BMS and battery racks, then noise immunity and safety are improved, but transmission speed decreases as system scale increases
Solution Approach 1:
The patent changes the communication protocol parameters by switching from CAN protocol to TCP/IP or UDP protocols for data transmission between BMS units and the central controller. This parameter change enables higher transmission speeds while maintaining reliability through protocol-level error handling and data validation mechanisms inherent in TCP/IP and UDP.
3Loss of time
If the scale of battery system managed by one PCS is limited to improve data transmission speed, then transmission delay is reduced, but application flexibility and system scalability are restricted
Solution Approach 1:
The patent segments the battery management function into multiple distributed BMS units, each capable of managing a subset of battery racks. This segmentation allows the system to scale flexibly by adding more BMS units as needed, while each unit maintains fast local data transmission. The modular architecture enables the system to adapt to various application scales without being constrained by a single PCS's management capacity.
Solution Approach 2:
The patent adds a hierarchical dimension to the system architecture, with multiple BMS units operating at one level and a central controller at another level. This dimensional change enables the system to manage large-scale battery installations by distributing management functions across multiple units while maintaining centralized oversight, thus achieving both fast transmission and high scalability.
Data Source
AI summary
The present disclosure relates to an energy storage system. The energy storage system may include a battery system configured to include battery banks electrically connected to each other, and battery management systems including first and second ports for transmission control protocol/Internet protocol (TCP/IP) or user datagram protocol (UDP) communication, the battery management systems being configured to communicate with the battery banks, configured to receive state data from a corresponding one of the battery banks, and configured to communicate in a daisy chain manner with one another.