EV Charging Port Control for CCS and NACS Mode Switching
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Solution Overview
Problem
The increasing adoption of the Tesla type charging mode (NACS mode) in North America necessitates electric vehicles to comply with both the Combined Charging System (CCS) and the North American Charging Standard (NACS) standards, posing a challenge for charging apparatuses to adapt to these dual standards.
Innovation Solution
An apparatus and method for charging electric vehicles that are capable of operating in both CCS and NACS modes, featuring a charging port, detection block, charging control unit, and relay box that can separate charging power into AC and DC modes based on the detected charging standard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If charging apparatuses are designed to comply with both CCS and NACS standards, then adaptability is improved, but device complexity increases
Solution Approach 1:
The charging apparatus is designed with a universal charging port that can accommodate both CCS and NACS charging connectors. The port structure includes contact terminals that can establish electrical connections for both charging standards, allowing a single apparatus to serve multiple charging protocols without requiring separate dedicated ports for each standard.
Solution Approach 2:
The charging apparatus employs a detection block that is segmented into multiple detection units, each capable of detecting specific connection states corresponding to different charging standards. This segmentation allows the system to independently identify whether a CCS or NACS connector is connected and automatically select the appropriate charging mode without requiring complex manual configuration.
2Measurement precision
If detection blocks include multiple detectors for different charging ports, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
Multiple detection functions are merged into a single integrated detection block. The detection block contains multiple detection units that can simultaneously or sequentially detect connection states for both CCS and NACS ports. By combining these detection capabilities in one unified component rather than using separate detection systems, the patent achieves high detection accuracy while minimizing the increase in overall device complexity.
Solution Approach 2:
The detection block is designed to automatically detect the type of charging connector connected and self-determine the appropriate charging mode without external intervention. The multiple detection units within the block work autonomously to identify connection states and provide this information to the charging control unit, enabling the system to self-configure for the correct charging standard.
3Manufacturing precision
If relay box includes AC and DC relays for power separation, then charging control precision is improved, but device complexity increases
Solution Approach 1:
The relay box employs dynamic switching mechanisms where AC and DC relays can be selectively activated or deactivated based on the detected charging mode. The relays are controlled by the charging control unit to dynamically establish or disconnect electrical pathways, allowing precise control over power flow direction and type. This dynamic configuration enables accurate power separation for different charging standards without requiring permanently fixed complex circuitry.
Data Source
AI summary
An embodiment apparatus for charging an electric vehicle includes a charging port, a detection block configured to generate a detection signal by detecting whether or not a charging connector of a charging facility is connected to the charging port, a charging controller configured to perform charging control using a first charging mode or a second charging mode according to the detection signal, and a relay box configured to separate charging power supplied from the charging facility into direct current power and alternating current power according to the charging control.