Battery Bank BMS Daisy-Chain Communication for Faster Data Transfer
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Solution Overview
Problem
Existing energy storage systems face challenges with increased transmission delay due to the growing number of battery racks and cells, necessitating faster data processing and transmission speeds to ensure safety and efficiency.
Innovation Solution
Implementing a communication structure using TCP/IP ports and unique IDs for battery management systems (BMS) to facilitate daisy-chain data transmission, allowing parallel processing and management of data zones, thereby reducing transmission delays.
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 is improved, but the data transmission delay increases due to CAN communication limitations
Solution Approach 1:
The patent divides the battery system into multiple battery banks, each managed by a separate BMS unit. This segmentation allows parallel data collection and processing across multiple independent units, reducing the overall transmission delay while maintaining system expandability.
Solution Approach 2:
The patent introduces an intermediate data processing layer where BMS units aggregate and pre-process data from multiple racks before transmitting to the central control system. This intermediary processing reduces the data volume and transmission time to the central system.
2Reliability
If conventional CAN communication is used for data transmission between BMS and battery racks, then noise immunity and safety are improved, but the data transmission speed decreases
Solution Approach 1:
The patent combines multiple communication protocols, using CAN communication for reliable low-speed data transmission and Ethernet/TCP/IP for high-speed bulk data transmission. This hybrid approach leverages the strengths of both protocols to achieve both reliability and speed.
Solution Approach 2:
The patent implements dynamic communication mode selection where the system automatically switches between different communication protocols and modes based on data priority, system state, and transmission requirements, optimizing both speed and reliability for different scenarios.
Data Source
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AI summary
The present disclosure relates to an energy storage system. The energy storage system may include: a battery system configured to include a plurality of battery banks electrically connected to each other; and a plurality of battery management systems each configured to communicate with the plurality of battery banks and to receive state data from a corresponding battery bank among the plurality of battery banks. The plurality of battery management systems may include first and second ports for TCP/IP or UDP communication, respectively, and communicate in a daisy chain manner with other battery management system using the first and second ports.