Multi-Battery BMS Coordination for Safe Load Sharing
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Solution Overview
Problem
Existing battery systems lack advanced functionality and efficiency in managing multiple batteries and external loads, particularly in balancing state of charge and preventing damage, requiring improved coordination and communication within the system.
Innovation Solution
A multi-battery system with a master battery management system that communicates battery operation data via CANBUS, integrates new batteries based on state of charge, and controls overall operations, including charging and discharging, while monitoring various conditions to ensure safe and efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a multi-battery system is implemented to improve power management capability, then the power supply capacity and flexibility are improved, but the system complexity and coordination difficulty increase
Solution Approach 1:
The system divides the multi-battery configuration into independent battery modules, each with its own management system. This segmentation allows each battery to operate independently while contributing to the overall system capacity, managing complexity through modular design.
Solution Approach 2:
Multiple battery systems are merged into a unified power management architecture where all batteries communicate through a common controller. This combining approach enables coordinated operation and load sharing while maintaining individual battery independence.
2Ease of operation
If advanced communication protocols are implemented between BMS and external loads, then the functionality and control precision are improved, but the device complexity increases
Solution Approach 1:
The communication system is designed with multi-functionality to handle various communication tasks through a unified protocol. The same communication infrastructure supports data exchange, control commands, status monitoring, and diagnostics, reducing the need for separate communication channels for different functions.
3Reliability
If real-time monitoring of battery state of charge is implemented to prevent damage, then the reliability and safety are improved, but the measurement and control difficulty increases
Solution Approach 1:
The system implements continuous feedback monitoring of battery state of charge through voltage, current, and temperature sensors. This real-time feedback enables the BMS to detect charge levels and adjust charging/discharging operations to prevent overcharge, over-discharge, and thermal runaway, ensuring battery safety through closed-loop control.
Data Source
AI summary
Provided is a battery system, including: at least two batteries, each battery comprising a battery management system; a plurality of sensors for sensing battery operation data; at least one external connection port; wherein: at least two battery management systems of the at least two batteries are coupled to the at least one external connection port; and at least two battery management systems of the at least two batteries store machine-executable instructions, that when executed, cause the at least one battery management system to communicate battery operation data to at least one external load.