Slave BMS Inverted-F Antenna Circuit for Wireless Battery Packs
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Solution Overview
Problem
Existing battery systems require additional components for wireless communication between battery management systems (BMS), which increases size and cost, and necessitate frequency-specific PCB designs.
Innovation Solution
A battery system utilizing a slave BMS with a capacitor and inductor configuration that enables wireless communication by transmitting AC signals through an inverted-F antenna mode, eliminating the need for separate antennas and allowing communication across various ISM frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless communication is implemented using existing mobile communication standards, then communication functionality is achieved, but power consumption increases and battery life decreases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting communication parameters (transmission power, data rate, modulation scheme) based on the actual communication environment and requirements. The controller selects appropriate communication modes and adjusts parameters in real-time to achieve reliable communication while minimizing power consumption, thus extending battery life without sacrificing communication functionality.
2Area of stationary object
If communication range is extended to cover large areas, then coverage is improved, but power consumption increases
Solution Approach 1:
The patent applies segmentation by dividing the communication coverage area into multiple zones with different communication requirements. The system segments the battery power allocation according to different communication scenarios (e.g., indoor vs. outdoor, moving vs. stationary), allowing optimized power consumption for each segment while achieving overall large-area coverage.
Solution Approach 2:
The patent implements dynamics by making the communication system adaptive to changing environments. The controller dynamically adjusts transmission parameters based on real-time conditions (signal strength, interference, user mobility), enabling the system to extend coverage area when needed while conserving power during low-activity periods, thus resolving the contradiction between coverage and power consumption.
3Speed
If high data transmission rates are used, then communication speed is improved, but power consumption increases
Solution Approach 1:
The patent applies partial action by transmitting data at high rates only when necessary (e.g., during critical communication periods or when channel conditions are favorable). For routine or non-urgent data, the system uses lower transmission rates, thus achieving high data transmission rates when needed while maintaining acceptable overall power consumption levels.
Data Source
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AI summary
The present disclosure relates to a wireless communication method between a plurality of battery management systems (BMSs) and a battery system providing the same. The battery system including at least one battery pack including a battery module and a slave battery management system (BMS) managing the battery module according to the present disclosure includes: a communication unit of the slave BMS; a capacitor connected between the communication unit and a first ground; an inductor connected between a contact between the first ground and the capacitor and a second ground; and a controller configured to transmit an AC signal having a predetermined frequency to the communication unit in an antenna mode in which the slave BMS is configured to communicate with the outside.