Shielded Battery Module Layout for Wireless EMI Control
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Solution Overview
Problem
Conventional power systems with battery monitoring systems face challenges in preventing electromagnetic noise interference and leakage, which can disrupt wireless communication between battery monitors and ECUs.
Innovation Solution
A battery module with an electromagnetic shielding housing and a shield arranged opposite to a non-electromagnetic shielding portion, which inhibits or suppresses electromagnetic noise interference and leakage, ensuring reliable wireless communication.
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 multiple compartments by partition walls, with each compartment containing specific components (battery monitors in first compartment, ECU in second compartment). This spatial segmentation isolates wireless communication devices from sensitive electronic control units, reducing electromagnetic interference while maintaining monitoring functionality.
Solution Approach 2:
An electromagnetic shielding plate is introduced as an intermediary component between the battery monitors and ECU. This shielding plate blocks electromagnetic noise generated by wireless communication devices, preventing it from interfering with the ECU while allowing necessary signal transmission through designated non-shielding portions.
2Reliability
If wireless communication is implemented between battery monitors and ECU, then monitoring capability is improved, but electromagnetic noise leakage to external equipment occurs
Solution Approach 1:
The electromagnetic shielding plate features localized shielding properties with different regions having different characteristics. Most areas provide electromagnetic shielding, while specific non-shielding portions allow wireless communication signals to pass through. This local differentiation enables the system to contain internal electromagnetic noise while permitting necessary external communication.
Solution Approach 2:
The shielding plate is positioned in a specific spatial dimension between the wireless communication devices and external environment. By strategically placing the shielding plate at an intermediate position, the system creates a three-dimensional electromagnetic field management structure that contains noise internally while allowing controlled external communication through designated openings.
3Object-affected harmful factors
If compartmentalization is implemented in housing, then electromagnetic noise control is improved, but device complexity increases
Solution Approach 1:
The partition walls serve multiple functions: they provide structural support for the housing, create necessary compartmentalization for electromagnetic noise control, and offer mounting surfaces for securing components. This multi-functionality reduces the need for additional dedicated structures, thereby limiting the increase in device complexity while achieving effective electromagnetic noise management.
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
The solution effectively reduces electromagnetic noise interference and leakage, maintaining the integrity of wireless communication within the battery module and preventing external electromagnetic noise from entering the storage space.
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
Implementation Method 2
the compartment wall having a non-electromagnetic shielding portion
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.