EV Charging Control Apparatus Proximity Detection Relay Segmentation
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Solution Overview
Problem
Electric vehicles face challenges in accurately distinguishing between battery short-circuit errors and charging cable non-proximity errors, leading to inefficient charging processes.
Innovation Solution
A charging control apparatus and method that includes a proximity detection port, a controller, and a relay to generate and process proximity signals, allowing for accurate determination of charging cable connection and battery short-circuit status, enabling appropriate error handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the EV uses a single proximity detection interface to determine charging cable connection, then the device complexity is reduced, but the measurement precision of error detection deteriorates
Solution Approach 1:
The patent divides the error detection function into two separate proximity detection interfaces: a first proximity detection interface for detecting charging cable connection status, and a second proximity detection interface for detecting battery short-circuit errors. This segmentation allows each interface to be optimized for its specific detection task, improving measurement precision without significantly increasing overall system complexity.
Solution Approach 2:
The patent introduces a relay as an intermediary component between the two proximity detection interfaces and the controller. The relay isolates the detection circuits and enables independent operation of each detection interface, allowing accurate error determination while maintaining manageable device complexity through modular architecture.
2Measurement precision
If the EV uses multiple proximity detection interfaces to accurately determine error type, then the measurement precision of error detection is improved, but the device complexity increases
Solution Approach 1:
The patent segments the detection system into two specialized interfaces with distinct functions: the first interface dedicated to charging cable proximity detection and the second interface dedicated to battery short-circuit detection. This functional segmentation enables accurate error determination while keeping each component relatively simple.
Solution Approach 2:
Both proximity detection interfaces share common components including the relay, controller, and power supply circuitry. This multi-functionality approach allows the system to achieve enhanced detection capability through shared infrastructure, thereby limiting the increase in overall device complexity despite having multiple detection interfaces.
3Device complexity
If the EV does not accurately determine the type of charging error, then the device complexity is reduced, but the productivity of charging process deteriorates
Solution Approach 1:
By segmenting the error detection into two distinct interfaces, the system can quickly identify the specific error type (charging cable disconnection vs. battery short-circuit) without complex analysis, enabling rapid error handling and maintaining high charging productivity.
Solution Approach 2:
The patent implements preliminary error detection before charging starts by using the two proximity detection interfaces to check for charging cable connection and battery short-circuit conditions in advance. This preliminary action prevents charging delays and maintains productivity by identifying and addressing errors before they disrupt the charging process.
Data Source
AI summary
An embodiment relates to a charging control apparatus and a charging control method for an electric vehicle. A charging control apparatus according to an embodiment comprises: a proximity detection port to which a proximity signal from a connector of a charging cable is input; a first proximity detection interface for generating a first proximity detection signal on the basis of the proximity signal; a controller for determining whether the connector of the charging cable is in proximity, on the basis of the first proximity detection signal; and a relay disposed between the proximity detection port and the first proximity detection interface and providing a proximity identification signal to the controller on the basis of a control by the controller.