Wireless Battery Management Channel Switching via Remote Antenna
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Solution Overview
Problem
Wireless battery management systems in vehicles face interference challenges due to metal enclosures that shield external interference, making it difficult to detect and mitigate interference in a timely manner, especially when approaching sources like Wi-Fi hotspots or other vehicles, which can lead to packet errors and communication disruptions.
Innovation Solution
Incorporating a remote antenna located outside or inside the battery pack enclosure but less shielded by it, allowing earlier detection of interference and enabling proactive channel selection and reservation to avoid interference, using the same or different wireless protocols to transmit reservation signals before communication occurs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a master antenna is used inside the battery pack enclosure for wireless communication, then the communication system is compact and integrated, but the metal enclosure shields external interference making it difficult to detect and mitigate interference in a timely manner
Solution Approach 1:
The antenna system is segmented into two distinct components: a master antenna located inside the battery pack enclosure for primary communication, and a remote antenna positioned outside the enclosure for interference detection. This segmentation allows each antenna to serve its specific function optimally while resolving the contradiction between integration and interference detection capability
Solution Approach 2:
The remote antenna acts as an intermediary element between the external environment and the master controller. It detects interference signals outside the metal enclosure and relays this information to the master controller, enabling the system to detect and respond to interference without compromising the compact integrated design
2Object-affected harmful factors
If the battery pack enclosure uses metal shielding, then protection against external electromagnetic interference is improved, but detection of external interference sources becomes delayed when approaching them
Solution Approach 1:
The remote antenna performs preliminary interference detection outside the metal enclosure before the master antenna inside would detect it. By detecting interference signals in advance and relaying this information to the master controller, the system can proactively switch to alternative channels or adjust communication parameters before interference degrades communication quality
Solution Approach 2:
The remote antenna continuously monitors the external electromagnetic environment and provides feedback to the master controller about interference conditions. This feedback loop enables the system to detect interference earlier and respond appropriately, reducing the time loss associated with interference detection while maintaining the protective shielding
3Reliability
If wireless communication channels are selected dynamically based on interference levels, then communication reliability is improved, but the system complexity and processing requirements increase
Solution Approach 1:
The master controller autonomously manages channel selection and communication parameter adjustment based on interference information received from the remote antenna. The system self-regulates by automatically switching to alternative wireless channels or adjusting transmission parameters when interference is detected, without requiring external intervention or complex manual configuration
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
This approach allows for earlier detection of interference, enabling the system to change channels and reserve clear frequencies, reducing packet errors and ensuring reliable communication by mitigating external interference impacts.
Implementation Method 1
receive signalling from the remote antenna; process the signalling received from the remote antenna to determine a level of interference in the plurality of wireless channels
Data Source
AI summary
A battery management system, comprising: a battery pack enclosure that contains: a master controller and a plurality of slave controllers. Each of the plurality of slave controllers is configured to communicate wirelessly with the master controller using their respective antennas over one of a plurality of wireless channels. The battery management system further comprises: a remote antenna, which is located remote from the master antenna such that it is less shielded by the battery pack enclosure to interference that is external to the battery pack enclosure; and a controller that is configured to: receive signalling from the remote antenna and process the signalling to determine a level of interference in the plurality of wireless channels; and based on the determined level of interference in the plurality of wireless channels, select one of the plurality of wireless channels for wireless communication between the master controller and the plurality of slave controllers.