EV Charging Socket Calibration Device for Temperature Sensor Accuracy
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Solution Overview
Problem
Existing calibration methods for electric vehicle charging devices are inadequate, leading to reduced charging efficiency and shortened service life due to inaccurate temperature sensing, as they fail to reliably detect and correct calibration issues over the vehicle's service life.
Innovation Solution
A calibration device with a plug and thermally acting calibration plate, connected to a temperature control unit and control unit, which sets predetermined temperatures to detect and correct calibration deviations in the charging socket's temperature sensor, allowing for continuous calibration throughout the vehicle's service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the temperature sensor is not calibrated, then the charging process continues without interruption, but the charging efficiency is reduced and the service life of the charging socket is shortened
Solution Approach 1:
The calibration device performs temperature sensor calibration before actual charging operations to ensure accurate temperature detection. By conducting preliminary calibration, the system avoids subsequent charging interruptions and extends the service life of the charging socket while maintaining high charging efficiency.
2Reliability
If the temperature sensor signals excessively high temperature values, then the charging current is reduced or interrupted, but the charging efficiency is unnecessarily reduced
Solution Approach 1:
The calibration device provides accurate temperature feedback to the control unit, enabling precise monitoring of the charging socket temperature. This accurate feedback ensures that charging current is only reduced or interrupted when actually necessary, preventing unnecessary charging efficiency loss while maintaining reliable protection of the charging socket.
3Productivity
If the temperature sensor signals excessively low temperature values, then the charging efficiency is maintained, but the service life of the charging socket is reduced
Solution Approach 1:
The calibration device performs preliminary calibration of the temperature sensor to correct low temperature signaling issues. This preliminary action ensures accurate temperature detection throughout the charging process, maintaining both high charging efficiency and extended service life of the charging socket by preventing undetected overheating conditions.
4Measurement precision
If a calibration device is introduced, then the temperature sensor can be calibrated, but the device complexity increases
Solution Approach 1:
The calibration device serves as an intermediary tool that connects to the charging socket through the charging plug interface. It includes a temperature control unit that can heat or cool a thermal mass, which then transfers thermal energy to the charging socket to simulate various temperature conditions for calibration purposes. This intermediary approach enables accurate temperature sensor calibration without requiring complex internal modifications to the charging device itself.
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
Ensures high charging efficiency and extended service life of the charging socket by accurately detecting and correcting calibration issues, preventing overheating and damage, thus enhancing user satisfaction.
Implementation Method 1
a calibration plate (63) held on the plug (61) and acting thermally on the charging socket (31)
Implementation Method 2
a temperature control unit (64), held on the calibration plate (63) and thermally connected to the calibration plate (63), and a control unit (70) operatively connected to the temperature control unit (64), which sets a temperature of the calibration plate (63) to a predetermined temperature
Data Source
AI summary
A calibration device for a charging device of an electric vehicle and a method for calibrating a charging device of an electric vehicle are described.