Battery Module Waveguide Housing for Wireless Signal Stability
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Solution Overview
Problem
Wireless communication between battery monitoring devices and a battery ECU is hindered by the generation of high-order electromagnetic waves in a metal housing, leading to signal interference due to standing waves formed by repeated reflections of wireless signals.
Innovation Solution
A battery module design with a waveguide path and electromagnetic reflection housing that suppresses the intrusion and generation of high-order electromagnetic waves by ensuring the waveguide path lengths are longer than half the wavelength of the wireless signal and incorporating materials that reflect electromagnetic waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless communication is performed in a metal housing, then communication capability is enabled, but signal interference occurs due to standing waves from repeated reflections
Solution Approach 1:
The patent introduces waveguide tubes as intermediary structures between the metal housing and the wireless communication components. These waveguide tubes act as mediators that allow wireless signals to pass through the metal housing while preventing the formation of standing waves and high-order electromagnetic waves, thus enabling communication without signal interference.
Solution Approach 2:
The patent changes the physical parameters of the housing structure by incorporating waveguide tubes with specific dimensions. The waveguide tubes have lengths and cross-sectional dimensions designed to suppress high-order electromagnetic waves while allowing the fundamental wireless signal to pass through, thereby changing the electromagnetic field distribution parameters within the housing.
2Object-affected harmful factors
If waveguide path length is increased to suppress high-order electromagnetic waves, then signal interference is reduced, but device volume increases
Solution Approach 1:
The waveguide tubes are nested within the existing battery module structure, integrating the interference suppression functionality into the housing itself. This nesting approach allows the waveguide structures to be accommodated within the available space without significantly increasing the overall device volume, while still achieving the desired suppression of high-order electromagnetic waves.
Solution Approach 2:
The patent applies waveguide structures only in specific locations where wireless communication occurs, rather than throughout the entire housing. This localized application of the waveguide principle allows for effective suppression of high-order electromagnetic waves in the critical communication zones while minimizing the overall volume increase of the device.
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 design effectively prevents signal interference by restricting the generation and intrusion of high-order electromagnetic waves, ensuring reliable wireless communication between individual communication units and the monitoring unit.
Implementation Method 1
an electromagnetic reflection housing having a storage space to store the plurality of assembled batteries, the plurality of individual detection units, the plurality of individual communication units, and the monitoring unit
Implementation Method 2
a waveguide path and electromagnetic reflection housing that suppresses the intrusion and generation of high-order electromagnetic waves by ensuring the waveguide path lengths are longer than half the wavelength of the wireless signal
Data Source
AI summary
A battery module includes: a plurality of assembled batteries; a plurality of individual detection units configured to individually detect a physical quantity of each of the plurality of assembled batteries; a plurality of individual communication units configured to output a detection result of each of the plurality of individual detection units as wireless signal; a monitoring unit configured to wirelessly communicate with each of the plurality of individual communication units; and an electromagnetic reflection housing having a storage space to store the plurality of assembled batteries, the plurality of individual detection units, the plurality of individual communication units, and the monitoring unit.