Battery Pack BMS Frequency Hopping for Low-Interference Power Control
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Solution Overview
Problem
Conventional wireless communication methods between a master BMS and slave BMSs in battery packs face high power consumption and interference issues due to excessive signal transmission power, which is not optimized for actual noise conditions.
Innovation Solution
A frequency hopping method is employed, where the master BMS selects hopping channels based on noise intensity and type measurements, calculates optimal signal transmission power, and generates a hopping sequence to minimize power consumption and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If maximum signal transmission power is used for wireless communication between master BMS and slave BMSs, then communication reliability is improved, but battery power consumption increases
Solution Approach 1:
The patent implements dynamic signal transmission power adjustment by continuously monitoring communication quality metrics (packet error rate, signal-to-noise ratio) and adapting the transmission power level accordingly. The master BMS transitions from static maximum power transmission to dynamic power control, adjusting power levels in real-time based on actual communication conditions, thereby reducing unnecessary power consumption while maintaining reliable communication.
Solution Approach 2:
The patent establishes a feedback mechanism where the master BMS monitors communication quality between itself and slave BMSs, and uses this feedback information to adjust signal transmission power. The system measures communication quality metrics and feeds this information back to the power control algorithm, which then optimizes transmission power levels to maintain reliability while minimizing power consumption.
2Area of stationary object
If maximum signal transmission power is used for wireless communication, then communication coverage is improved, but interference with other communication protocols increases
Solution Approach 1:
The patent changes the transmission power parameter dynamically based on communication quality metrics and environmental conditions. Instead of using fixed maximum power, the system adjusts power levels according to actual needs, thereby reducing interference with other communication protocols while maintaining adequate communication coverage through intelligent parameter optimization.
3Reliability
If wired communication method is used between master BMS and slave BMSs, then communication stability is improved, but system complexity increases
Solution Approach 1:
The patent replaces the mechanical wired communication system with a wireless communication system. By substituting physical cable connections with wireless signal transmission, the system eliminates the complexity of wired connections while achieving comparable or superior communication stability through advanced signal processing and error correction mechanisms.
Data Source
AI summary
The present invention relates to a wireless communication method in a battery pack and a master BMS for providing the method. The master BMS according to the present invention, as a master BMS for performing wireless communication with a slave BMS according to a frequency hopping method in a battery pack, may include: a communicator for receiving first channel scan information generated by scanning a plurality of channels belonging to a frequency bandwidth used in the wireless communication by a device disposed outside the battery pack; a channel analyzer for generating second channel scan information by scanning the channels belonging to the frequency bandwidth; a storage unit for storing a reference signal to noise ratio (SNR) value on the wireless communication; and a control unit for selecting a hopping channel used in the frequency hopping method based on the first channel scan information, and calculating signal intensity of the selected hopping channel based on the second channel scan information and the reference SNR value.