Wireless Battery Pack Master Slave Connection Retry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication between a master and slaves in battery packs can be disrupted by external noise, leading to unwanted disconnections, which affects the management and control of battery modules in high-capacity and high-voltage applications like electric vehicles.
Innovation Solution
The master selectively identifies and retries connections with slaves that have failed wireless connections, using a higher signal strength to re-establish communication, thereby reducing the time required for successful wireless connection with all slaves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless communication is carried out between the master and all slaves, then the control system can monitor and manage battery modules, but wireless connection may be unwantedly disconnected due to external noise
Solution Approach 1:
The master performs preliminary actions by maintaining a list of slave IDs that have successfully connected and those that have failed. Before attempting reconnection, the master prepares the retry list and signal strength adjustments in advance, enabling rapid response when disconnection occurs without needing to re-establish all connections from scratch.
Solution Approach 2:
The system implements feedback mechanisms where the master continuously monitors connection status of slaves and adjusts its behavior based on this information. When disconnection is detected, the master uses feedback about which slaves failed and their previous connection states to selectively retry only those connections, improving reliability through adaptive response to noise disruptions.
2Reliability
If the master retries wireless connection with all slaves after disconnection, then connection stability improves, but the time required for reconnection increases
Solution Approach 1:
The master segments the slave population into different groups based on connection status: slaves that successfully connected and those that failed. This segmentation allows the master to apply different reconnection strategies to different groups, retrying only the failed connections rather than all slaves, thereby reducing reconnection time while maintaining stability.
Solution Approach 2:
The system applies local quality by treating different slaves differently based on their individual connection states. The master adjusts signal strength and retry behavior locally for each slave based on their specific connection history, rather than applying a uniform reconnection approach to all slaves, which optimizes both time and reliability.
3Reliability
If the master transmits signals with higher signal strength to ensure connection, then connection reliability improves, but energy consumption increases
Solution Approach 1:
The master dynamically adjusts signal strength based on the specific needs of each slave and the current connection state. Rather than continuously transmitting at maximum power, the system varies signal strength adaptively - using higher power only when needed for reconnection attempts with failed slaves, and normal power for successful connections, thereby reducing overall energy consumption while maintaining reliability.
Solution Approach 2:
The system changes the signal strength parameter dynamically based on connection status and retry requirements. The master modifies transmission parameters such as power level and transmission timing according to the specific slave being communicated with and the current connection state, optimizing the balance between reliability and energy efficiency through parameter adaptation.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided are a wireless control system, a wireless connection method and a battery pack. The wireless control system includes a master; and a plurality of slaves. Each slave wirelessly transmits a response packet including an ID of each slave when receiving a first command packet wirelessly transmitted from the master. The master sets, as a first group, each slave to which the ID included in each response packet wirelessly received within a predetermined period of time from a time point at which the first command packet was transmitted is allocated, and sets, as a second group, each slave not set as the first group. The master wirelessly transmits a second command packet including the ID of each slave belonging to the second group.