Wireless Battery Management Slot Assignment
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Solution Overview
Problem
In wireless battery management systems, wireless channel contention and transmission collisions occur when multiple slave controllers communicate with a single master controller, leading to data transmission errors and delays in battery data monitoring.
Innovation Solution
A wireless battery management system that assigns dedicated slots with different time intervals to monitor nodes, allowing them to communicate smoothly with a manager node, preventing channel contention by using a short-range wireless network and a method to dynamically adjust slots based on the number of monitor nodes joining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple slave controllers communicate with a single master controller over a wireless channel, then space efficiency is improved compared to wired CAN networks, but wireless channel contention and transmission collisions occur causing data transmission errors
Solution Approach 1:
The transmission slot is divided into multiple dedicated slots, with each slot assigned to a specific monitor node. This segmentation eliminates wireless channel contention by providing each node with its own dedicated transmission time, thereby preventing data transmission errors while maintaining space efficiency of wireless communication.
2Reliability
If dedicated slots are assigned to monitor nodes to prevent transmission collisions, then data transmission reliability is improved, but system complexity increases due to slot management
Solution Approach 1:
Monitor nodes automatically determine their own dedicated slot positions based on their node IDs without requiring complex centralized slot assignment. Each node calculates its slot position independently, which simplifies the overall system management while ensuring reliable data transmission through dedicated slots.
3Device complexity
If the wireless battery management system is designed to accommodate a fixed number of monitor nodes, then slot assignment is simplified, but system adaptability decreases when nodes are added or removed
Solution Approach 1:
The slot assignment is dynamically adjusted based on the actual number of monitor nodes in the system. When nodes are added or removed, the transmission slot is redivided accordingly, allowing the system to adapt to changing configurations while maintaining simple slot management through automated redistribution.
Data Source
AI summary
Disclosed are a wireless battery management system, a node for wireless communication, and a method of assigning slot, which respectively assign dedicated slots having different time intervals to monitor nodes to support smooth and stable communication between the monitor nodes and a manager node. The wireless battery management system includes a manager node checking number of monitor nodes joining in a short-range wireless network for battery management, dividing a transmission slot, assigned for data transmission, by the number of monitor nodes to generate a plurality of dedicated slots, and respectively assigning the plurality of dedicated slots to the monitor nodes and a monitor node collecting battery data and transmitting the collected battery data to the manager node during an assigned dedicated slot.