Wireless Battery Management Polling With Interleaved Control Slots
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Solution Overview
Problem
Existing battery management systems face challenges in efficiently handling both high-frequency downstream control data and upstream measurement data in wireless implementations, particularly due to shared bandwidth usage, which complicates the management of battery operations in electric vehicles.
Innovation Solution
A dual network manager architecture is employed to dynamically interleave upstream measurement data into the wireless schedule of downstream control data transmission, utilizing redundancy and timeslot partitioning to enhance communication reliability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control data is transmitted at high frequency to all battery clusters, then battery control reliability is improved, but wireless bandwidth consumption increases and measurement data transmission is compromised
Solution Approach 1:
The system segments the battery management network into multiple network managers (first and second network managers) that operate in parallel. Each manager handles a subset of battery clusters, dividing the overall communication load and allowing simultaneous control and measurement data transmissions without full bandwidth contention.
Solution Approach 2:
The system implements periodic timeslot allocation where control data transmission and measurement data transmission occur in alternating time periods. During first timeslots, control data is transmitted to all clusters; during second timeslots, measurement data is collected from clusters. This periodic scheduling ensures high-frequency control updates while guaranteeing measurement data transmission opportunities.
2Measurement precision
If measurement data is collected from all battery clusters, then battery monitoring accuracy is improved, but communication complexity and bandwidth usage increase
Solution Approach 1:
The system divides the battery cluster monitoring task across multiple network managers. The first network manager collects measurement data from a first subset of clusters during first timeslots, while the second network manager collects from a second subset during second timeslots. This segmentation reduces per-manager communication complexity while maintaining comprehensive monitoring coverage.
Solution Approach 2:
Measurement data collection is performed periodically in alternating timeslots rather than continuously. During measurement timeslots, clusters transmit their data; during control timeslots, they receive control commands. This periodic approach reduces overall communication complexity compared to simultaneous continuous bidirectional communication.
3Quantity of substance
If shared bandwidth is used for both control and measurement data, then bandwidth efficiency is improved, but transmission reliability and timing precision deteriorate
Solution Approach 1:
The system alternates between control data transmission periods and measurement data transmission periods in a regular timeslot pattern. This periodic time-division multiplexing ensures that each data type receives dedicated bandwidth during its allocated period, eliminating interference and ensuring reliable transmission with precise timing, while still achieving overall bandwidth efficiency through full utilization of the available channel.
Data Source
AI summary
Techniques for dynamically interleaving measurement data into a wireless schedule for control data communication is described herein. A dual network manager architecture can be used for interleaving upstream transmission of measurement data from battery clusters into the wireless schedule of transmitting downstream control data from the network managers.