Boundary Slave BMS Layout for Metal-Housing Wireless Links
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Solution Overview
Problem
Wireless communication between a master battery management system and a slave battery management system can be unstable when a line of sight is not secured or when a metal material shields the communication path.
Innovation Solution
A battery system design where a first slave battery management system is installed at the boundary of a metal housing to avoid shielding, equipped with a first antenna for communicating with other slave systems inside the housing and a second antenna for communicating with the master system outside the housing, using frequency hopping to maintain stable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless communication is performed between master and slave battery management systems, then communication flexibility is improved, but communication stability deteriorates when line of sight is not secured or metal shielding is present
Solution Approach 1:
A relay battery management system is introduced as an intermediary device between the master and slave battery management systems. The relay system receives signals from slave systems inside the metal housing and retransmits them to the master system outside the housing, thereby mediating the communication path to overcome metal shielding effects and maintain stable wireless communication.
Solution Approach 2:
The patent utilizes different spatial dimensions and locations for antenna placement. The relay battery management system is positioned at a boundary location between inside and outside the metal housing, allowing it to receive signals from internal slave systems and transmit to the external master system, effectively using spatial dimensionality to bypass shielding obstacles.
2Strength
If slave battery management systems are installed inside metal housing, then protection and integration are improved, but wireless communication with master system deteriorates due to shielding
Solution Approach 1:
The battery management system is segmented into three distinct components: master battery management system outside the housing, relay battery management system at the boundary, and slave battery management systems inside the housing. This segmentation allows each component to be optimally positioned for its function, with the relay system bridging the communication gap caused by metal shielding.
Solution Approach 2:
The relay battery management system serves as an intermediary that receives wireless signals from slave systems inside the metal housing and retransmits them to the master system outside. This intermediary approach enables slave systems to remain protected inside the metal housing while maintaining reliable wireless communication through the relay node at the boundary.
Data Source
AI summary
The present invention includes a battery system including a battery pack having a metal housing capable of accommodating a plurality of battery modules, a plurality of slave battery management systems configured to manage the plurality of battery modules, and a master battery management system installed outside the metal housing to wirelessly communicate with a first battery management system among the plurality of slave battery management systems, wherein the first slave battery management system which communicates with the master battery management system is installed at a boundary of the metal housing so as not to be shielded with the metal housing.