Wireless Battery Pack Control System with Relay Communication
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Solution Overview
Problem
Wireless communication between the master and slave units in battery packs can be disrupted by external noise, leading to unreliable collection of battery information in high-reliability applications like electric vehicles.
Innovation Solution
Implementing a wireless control system where slaves forward not only their own battery information but also information from other slaves to the master, allowing the master to selectively retry connections and use higher signal strength for re-establishing communication, ensuring reliable data collection from multiple battery modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless communication is used between master and slaves, then device complexity is reduced and ease of operation is improved, but reliability deteriorates due to external noise causing disconnection
Solution Approach 1:
The patent introduces intermediary slaves that relay communication between the master and other slaves. When direct wireless connection between master and a slave is disrupted by external noise, the intermediary slave forwards data packets, ensuring continuous communication and maintaining system reliability while preserving wireless operation benefits.
2Device complexity
If direct wireless communication between master and each slave is used, then device complexity is minimized, but information collection reliability deteriorates when connection fails
Solution Approach 1:
The patent establishes preliminary relay paths through intermediary slaves before communication failures occur. These pre-configured relay relationships enable immediate data forwarding when direct connections fail, ensuring continuous reliable data collection without requiring complex real-time path reconstruction.
3Device complexity
If slaves only transmit their own battery information, then communication protocol simplicity is maintained, but information completeness deteriorates when some slaves are disconnected
Solution Approach 1:
The patent merges the information transmission functions of multiple slaves through intermediary relays. When a slave is disconnected, its battery information is forwarded by intermediary slaves that have already received the data, ensuring complete information collection across all battery modules while maintaining simple individual slave protocols.
Data Source
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AI summary
Provided are a wireless control system, a wireless control method and a battery pack. The wireless control system includes a master configured to wirelessly transmit a first command packet, and first to Nth slaves to which first to Nth IDs are allocated, respectively. When the first slave receives the first command packet, the first slave wirelessly transmits a first response packet including first battery information and the first ID. When a k+1th slave receives the first command packet, the k+1th slave stands by to receive a kth response packet for a preparation period and wirelessly transmits a k+1th response packet including k+1th battery information and a k+1th ID. When the kth response packet is received by the k+1th slave within the preparation period, the k+1th response packet further includes kth battery information and a kth ID.