Battery Pack Antenna Positioning for Wireless Reliability
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Solution Overview
Problem
Battery packs with metal housings experience radio wave interference due to reflected waves, leading to communication failures and blackouts, especially when conductive connectors on batteries shield direct waves, making it difficult to secure communication reliability.
Innovation Solution
The battery pack design positions sub-antennas farther in the projection direction than the conductive connectors, allowing direct waves to reach without obstruction, and positions main and sub-antennas higher than the conductive connectors to receive direct waves with higher intensity, reducing interference and ensuring reliable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sub-antennas are positioned closer to the conductive connectors, then the device complexity is reduced, but the communication reliability deteriorates due to radio wave interference and blocking
Solution Approach 1:
The patent positions sub-antennas in the projection direction (vertical dimension) relative to conductive connectors, creating a three-dimensional spatial arrangement where at least part of each sub-antenna is located farther in the projection direction than the projection-direction end of its corresponding conductive connector. This dimensional positioning allows direct waves to reach sub-antennas without being blocked by conductive connectors, resolving the contradiction between simplified device structure and reliable communication.
2Strength
If the metal housing is used, then the structural strength is improved, but the communication reliability deteriorates due to radio wave reflection and interference
Solution Approach 1:
The patent applies local quality by creating specific spatial zones within the metal housing where sub-antennas are positioned in regions farther in the projection direction than conductive connectors. This localized positioning strategy allows direct radio waves to reach sub-antennas without being blocked or reflected by conductive connectors or metal housing surfaces, maintaining communication reliability while preserving the structural advantages of the metal 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
This configuration enhances communication reliability by receiving direct waves with higher intensity, reducing the occurrence of communication failures and blackouts, and minimizes external radio wave interference, maintaining reliable data updates even in real-time applications.
Implementation Method 1
The monitor and the acquisition devices each have an antenna for wireless communication. The radio waves emitted from the antennas are reflected on the inner surfaces of the housing made from a metal
Implementation Method 2
A direct wave emitted from the main antenna reaches the respective sub-antennas and is thus received without being blocked by the respective conductive connectors
Implementation Method 3
The radio waves emitted from the antennas are reflected on the inner surfaces of the housing made from a metal, and many reflected waves are thereby generated
Data Source
AI summary
A battery pack includes: a plurality of assembled batteries disposed in a housing; respective acquisition devices that acquire battery information from the assembled battery corresponding thereto; and a monitor that wirelessly communicates with the respective acquisition devices. The monitor includes a main antenna, and the respective acquisition devices include respective sub-antennas. The respective assembled batteries include respective projections formed thereon, the respective projections including respective conductive connectors configured to electrically connect the battery cells to each other. Hereinafter, the direction in which the respective projections project s defined as a projection direction. The respective sub-antennas are disposed. in the housing, at least a part of the respective sub-antennas being positioned farther in the projection direction than a projection-direction end of the respective conductive connectors is. A direct wave emitted from the main antenna reaches the respective sub-antennas and is thus received without being blocked by the respective conductive connectors.