Double-Door EV Charger Layout for High-Low Voltage EMI Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric vehicle chargers suffer from electromagnetic interference between high voltage and low voltage parts, leading to malfunctions such as poor communication and billing errors, and hindered maintenance due to the lack of separate shielding.
Innovation Solution
An electric vehicle charger design featuring a double-door box that separates high voltage and low voltage parts, using an electromagnetic shield material like copper or aluminum fibers to minimize interference and facilitate easy access for maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If high voltage part and low voltage part are arranged in the same space without separate shielding, then device complexity is reduced, but electromagnetic interference occurs causing malfunctions such as poor communication and billing errors
Solution Approach 1:
The charger interior is segmented into separate high voltage and low voltage compartments using a partition wall and double-door box structure. This spatial segmentation prevents electromagnetic interference between the two voltage systems while maintaining organized component placement, resolving the contradiction between structural simplicity and communication reliability.
Solution Approach 2:
A partition wall acts as an electromagnetic shield (intermediary) between the high voltage part and low voltage part. This intermediary structure blocks electromagnetic fields from interfering with communication circuits, ensuring reliable communication and billing operations while keeping the overall device structure manageable.
2Ease of manufacture
If high voltage part and low voltage part are arranged in the same space without separate shielding, then manufacturing cost is reduced, but malfunctions occur due to electromagnetic interference
Solution Approach 1:
The charger is divided into modular high voltage and low voltage sections with clear physical boundaries. This segmentation allows for standardized manufacturing of each module independently, reducing overall manufacturing complexity and cost while ensuring reliable operation through electromagnetic isolation.
Solution Approach 2:
Electromagnetic shielding materials are applied locally at critical interfaces between high voltage and low voltage regions rather than throughout the entire device. This targeted approach maintains operational reliability by blocking interference where it matters most while minimizing additional manufacturing costs.
3Reliability
If maintenance requires access from the rear side, then electromagnetic shielding is improved, but maintenance efficiency is reduced
Solution Approach 1:
The double-door box structure provides dynamic access control to the low voltage part. The doors can be opened from the front side to allow maintenance personnel to access components without rear side access, maintaining shielding effectiveness when closed while dramatically improving maintenance efficiency.
Solution Approach 2:
Access to the low voltage part is enabled through the front dimension rather than requiring rear access. The double-door mechanism creates a new access pathway that maintains electromagnetic shielding from the front while allowing easy maintenance, changing the traditional rear-access paradigm.
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 interference, preventing faulty communication and billing issues while improving maintenance efficiency by allowing separate access to high and low voltage components.
Implementation Method 1
a double-door box mounted to an inner side portion of the outer box main body and configure to be opened and closed and including a low voltage part that is arranged thereon; and a high voltage part separated from the low voltage part by the double-door box
Data Source
AI summary
Provided is an electric vehicle charger with a double-door box separating high and low voltage parts from each other, which is capable of minimizing electromagnetic interference by separating high and low voltage parts from each other by a double-door disposed in the front side of the charger and of improving efficiency of maintenance by allowing easy access from the front side toward the internal space of the charger. The electric vehicle charger may include an outer box main body, a front door mounted to be openable and closable at the front side of the outer box main body, a double-door box mounted to be openable and closable inside the front door and including the low voltage part arranged thereon, and the high voltage part arranged on an inner rear surface of the outer box main body and separated from the low voltage part by the double-door box.