Wireless BMS Antenna PCB Layout to Reduce ESS Signal Interference
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Solution Overview
Problem
Signal interference occurs due to complex wirings in energy storage systems (ESS), necessitating wireless communication between battery management systems (BMS) to improve efficiency and reduce communication errors.
Innovation Solution
Implementing antenna pattern modules with an inverted-F antenna (IFA) structure on flexible printed circuit boards (FPCBs) for short-range wireless communication between system BMS, rack BMS, and module BMS, utilizing 2.4 GHz band frequencies to minimize signal interference and reduce spatial and cost burdens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex wirings are installed for communication between BMS components, then communication coverage is ensured, but signal interference occurs and communication reliability deteriorates
Solution Approach 1:
The patent replaces the mechanical wiring system with a wireless communication system. Each BMS component (system BMS, rack BMS, module BMS) is equipped with an antenna pattern module that enables wireless signal transmission, eliminating the need for physical cable connections and thereby avoiding signal interference from complex wirings.
Solution Approach 2:
The patent introduces antenna pattern modules as intermediary components that facilitate communication between BMS components. These modules include antennas that transmit and receive wireless signals, acting as mediators that enable communication without direct physical connections, thus preventing signal interference.
2Reliability
If traditional rigid PCBs with mounted antennas are used, then antenna performance is maintained, but spatial requirements and manufacturing complexity increase
Solution Approach 1:
The patent merges the antenna structure directly with the flexible PCB by printing the antenna pattern onto the PCB surface. This integration eliminates the need for separate antenna components and their associated mounting processes, reducing manufacturing complexity while maintaining antenna functionality.
Solution Approach 2:
The patent employs flexible PCBs as the substrate for the antenna pattern. The flexible nature of the PCB allows for easier integration into compact BMS components and simplifies the overall structure, reducing both spatial requirements and manufacturing complexity compared to rigid PCB assemblies.
3Ease of operation
If wired communication is used between BMS components, then connection stability is ensured, but the system requires extensive wiring infrastructure and installation complexity increases
Solution Approach 1:
The patent replaces the mechanical wiring infrastructure with wireless communication capabilities. Each BMS component is equipped with an antenna pattern module that enables direct wireless communication, eliminating the need for extensive wiring infrastructure and significantly simplifying installation processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient wireless communication between BMS components, reducing communication errors and costs while providing spatial advantages by using FPCBs with IFA antennas, adhering to standards like WirelessHART and IEEE 802.15.4.
Implementation Method 1
an antenna pattern module mounted on a surface of the second PCB
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A battery management system, BMS, communication system includes a battery module including a housing and a plurality of battery cells in which a battery cell comprises a voltage sensing tab, a first printed circuit board, PCB, mounted on a side of the housing of the battery module and including a temperature sensor electrically connected to the voltage sensing tab of the battery cell to measure a temperature of the battery cell, and a second PCB stacked on a surface of the first PCB and including a cell sensing module electrically connected to the voltage sensing tab and the temperature sensor to exchange signals therewith, in which an antenna pattern module is mounted on a surface of the second PCB.