Battery Module Shielding Layout for Wireless Monitor EMI Control
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Solution Overview
Problem
Conventional power systems with battery monitoring systems face interference and leakage issues due to electromagnetic noise, affecting wireless communication between battery monitors and ECUs.
Innovation Solution
A battery module and power system design incorporating individual detectors, communicators, and a communications monitor within an electromagnetic shielding housing, featuring a non-electromagnetic shielding compartment and an opposing electromagnetic shield to inhibit or suppress electromagnetic noise interference and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless communication is implemented between battery monitors and ECU, then monitoring capability is improved, but electromagnetic noise interference and leakage occur
Solution Approach 1:
The housing is divided into a first housing and a second housing, with the communication unit positioned in the first housing and the battery monitors in the second housing. This segmentation separates the wireless communication function from the battery monitoring function, reducing electromagnetic interference between components while maintaining both capabilities.
Solution Approach 2:
A shield is introduced as an intermediary component between the first housing and the second housing. This shield acts as an electromagnetic barrier that blocks noise from the communication unit from interfering with the battery monitors, while still allowing the system to maintain wireless communication capability.
2Reliability
If wireless communication is implemented between battery monitors and ECU, then monitoring capability is improved, but electromagnetic noise leakage to other equipment occurs
Solution Approach 1:
The shield serves as an intermediary that contains electromagnetic noise generated by the communication unit within the first housing. This prevents the noise from leaking to other electrical equipment outside the battery module, while still allowing the wireless communication function to operate effectively.
Solution Approach 2:
The shield is positioned specifically between the communication unit and the battery monitors, providing localized electromagnetic shielding only where needed. This maintains the wireless communication capability while preventing noise leakage to external equipment, applying shielding selectively rather than throughout the entire housing.
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
Effectively prevents electromagnetic noise interference and leakage, ensuring reliable wireless communication between battery modules and ECUs, thereby maintaining system performance and reducing electromagnetic disturbances.
Implementation Method 1
an electromagnetic shielding housing having a storage space surrounded by a compartment wall to accommodate the at least two assembled batteries, the at least two individual communicators, and the communications monitor
Data Source
AI summary
A power system includes a battery module and a battery ECU. The battery module includes multiple battery stacks. Each of multiple battery stacks includes multiple battery cells, multiple detectors which independently detect physical values of the multiple battery cells, respectively, and multiple individual communicators which wirelessly output detection results of the multiple detectors. Each of the multiple individual communicators communicates a radio signal wirelessly to and from a general monitor. The multiple battery stacks and the general monitor are accommodated in a storage space in a housing having electromagnetic shielding performance. A shield is also accommodated in the storage space while facing a communication hole formed on the housing.