Battery Monitoring Reconnection Timing to Reduce Wireless Interference
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Solution Overview
Problem
In densely packed battery management systems, wireless communication connections between monitoring devices and a controller often result in radio wave interference due to simultaneous reconnection attempts, leading to inefficiencies.
Innovation Solution
The system and method involve controlling the start timing of monitoring devices' requesting operations for wireless communication reconnection based on the reception timing of disconnection instructions, ensuring that these timings do not overlap, thereby reducing radio wave interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If monitoring devices periodically execute requesting operations to request reconnection after disconnection, then wireless communication connection is restored, but radio wave interference occurs due to overlapping reconnection timings
Solution Approach 1:
The monitoring device determines the start timing of the requesting operation based on the reception timing of the disconnection instruction in advance. By calculating and setting the offset time before the requesting operation begins, the device ensures that reconnection requests are staggered and do not overlap, thus preventing radio wave interference while maintaining reliable communication restoration.
Solution Approach 2:
The monitoring device periodically executes requesting operations to request reconnection after disconnection. By controlling the periodic timing of these operations based on the disconnection instruction reception timing, the system ensures that reconnection attempts are distributed over time rather than occurring simultaneously, reducing radio wave interference while maintaining communication reliability.
2Productivity
If multiple monitoring devices reconnect simultaneously after disconnection, then communication is restored quickly, but interference increases due to simultaneous transmission requests
Solution Approach 1:
Each monitoring device calculates the start timing of its requesting operation in advance based on when it received the disconnection instruction. By setting an offset time before the requesting operation begins, devices stagger their reconnection attempts, maintaining efficient recovery while avoiding simultaneous transmission interference.
3Device complexity
If monitoring devices use fixed periodic intervals for requesting operations, then communication protocol is simplified, but reconnection timing overlaps occur reducing efficiency
Solution Approach 1:
The monitoring device changes the timing parameter of the requesting operation based on the reception timing of the disconnection instruction. By dynamically adjusting the start timing using an offset time calculated from the disconnection instruction receipt time, the system maintains protocol simplicity while improving reconnection efficiency and avoiding timing overlaps.
Data Source
AI summary
A battery management system includes monitoring devices arranged in a housing accommodating a battery. The monitoring devices monitor the battery and acquire battery monitoring information. The controller performs wireless communication with each of the monitoring devices via a wireless communication connection. The controller transmits a disconnection instruction to each of the monitoring devices. Each of the monitoring devices periodically executes a requesting operation after disconnection of the wireless communication connection. The controller accepts the requesting operation to establish the wireless communication connection. The controller and each of the monitoring devices perform a periodic communication of the battery monitoring information via the established wireless communication connection. Each of the monitoring devices determines start timing of the requesting operation based on reception timing of the disconnection instruction so that at least some of timings of requesting operations of the monitoring devices do not overlap with each other.