Parallel Resistor Diagnostic for Control Signal Wire Defects
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current diagnostic systems for motor vehicles cannot effectively determine whether a defect in the control signal wire between the controller and the charging port is due to the vehicle or the charging infrastructure, making it difficult to diagnose issues outside of the charging process.
Innovation Solution
A diagnostic device is implemented using a first resistor connected to the control signal wire in the controller and a second resistor in parallel on the charging port side, allowing for the measurement of current or voltage to detect defects in the control signal wire during non-charging operations, utilizing a combination of resistors to satisfy existing standards and enable regular diagnostic checks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single resistor is used in the controller to connect the control signal wire to ground, then the device complexity is reduced and manufacturing is easier, but the diagnostic capability to distinguish vehicle-side defects from charging infrastructure defects is insufficient
Solution Approach 1:
The single resistor in the controller is divided into two resistors: a first resistor remaining in the controller and a second resistor added in the charging port. This segmentation allows the diagnostic system to distinguish between vehicle-side defects (affecting the first resistor) and charging infrastructure defects (affecting the second resistor), thereby improving diagnostic precision while maintaining relatively simple device complexity
Solution Approach 2:
The second resistor in the charging port acts as an intermediary element that enables the controller to measure resistance values and distinguish the location of defects. By introducing this intermediary component in the charging infrastructure side, the system gains the ability to perform precise diagnostics without significantly increasing overall system complexity
2Productivity
If diagnostic checks are performed only during charging processes, then the device complexity is minimized, but the ability to perform regular diagnostics outside charging operations is lost
Solution Approach 1:
The diagnostic device enables resistance measurements to be performed at any time, not just during charging operations. The controller can conduct preliminary diagnostic checks outside charging processes by measuring the resistance between the control signal wire and ground, allowing regular monitoring of control signal wire integrity and enabling proactive maintenance before defects affect charging operations
Solution Approach 2:
The controller performs self-diagnosis by measuring resistance values using its existing evaluation device and current/voltage sources. The system uses its own resources (evaluation device, current source, voltage source) to conduct diagnostics independently, enabling regular checks without requiring external diagnostic equipment or interrupting normal vehicle operation
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
Enables the detection of control signal wire defects outside of charging processes, allowing for timely identification of issues within the vehicle and compliance with standards, enhancing diagnostic capabilities and facilitating regular checks.
Implementation Method 1
a first resistor which connects the control signal wire to ground is provided in the controller, and a second resistor connected in parallel with the first resistor is provided on the side of the charging port
Implementation Method 2
an evaluation device of the controller has a current source and/or a voltage source for supplying a current and/or a voltage outside a charging process and is configured to measure a current indicating a control signal wire defect or a voltage indicating a control signal wire defect by using the first and the second resistor
Data Source
AI summary
A diagnostic device for checking a control signal wire between a controller of a motor vehicle and a charging port for a battery of the motor vehicle located on the motor vehicle side is disclosed, wherein on the charging port side, a first resistor is provided in the controller connecting the control signal wire to chassis ground, and a second resistor connected in parallel to the first resistor is provided. An evaluation device of the controller has a current source and/or a voltage source for supplying an electric current and/or a voltage independent of a charging process, and is configured to measure an electric current indicating a defect in the control signal wire, or a voltage indicating a defect in the control signal wire, utilizing the first and the second resistor.