EV Charging Stop Switch Override via Connector Reconnection
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Solution Overview
Problem
Conventional vehicles cannot perform external charging if the emergency stop switch fails, leading to a situation where electric power exchange is halted and cannot be resumed.
Innovation Solution
A vehicle system that includes a stopping operation unit and a controller, which disables the stopping operation acceptance if a specific operation different from the intended operation is detected, allowing external charging to continue even in the event of a failure of the stopping operation unit, without requiring additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stopping operation unit is provided to stop external charging, then charging can be stopped when needed, but if the stopping operation unit fails, external charging cannot be performed
Solution Approach 1:
The controller monitors the operational status of the stopping operation unit and automatically activates the charging stop function based on detected failure conditions, enabling the system to self-diagnose and self-correct without requiring additional manual intervention or complex backup hardware
Solution Approach 2:
The controller continuously monitors the stopping operation unit's status and uses this feedback to determine whether to enable or disable the charging stop function, creating a closed-loop control system that adapts to the operational unit's condition
2Reliability
If the stopping operation unit fails in a stopped state, then electric power exchange cannot be resumed, but adding backup components increases device complexity
Solution Approach 1:
The controller automatically detects failure conditions and manages the charging state transitions without requiring additional backup operation units, enabling the system to self-correct from failure states using existing components
Solution Approach 2:
The controller performs multiple functions including normal charging control, failure detection, and automatic state management, allowing a single component to handle diverse operational scenarios without requiring specialized backup hardware
Data Source
AI summary
A vehicle includes a charging stop switch that accepts a stopping operation for stopping external charging, and an ECU that stops the external charging when the stopping operation is accepted at the charging stop switch. The ECU determines whether or not a specific operation different from the stopping operation at the charging stop switch has been accepted, and when it is determined that the specific operation has been accepted, disables acceptance of the stopping operation. The specific operation is an operation different from an intended operation of a prescribed subject. The vehicle includes an inlet to which a charging connector for external charging can be connected. The ECU detects connection of the charging connector to the inlet, the prescribed subject is the charging connector, and the specific operation is a prescribed number of operations of connecting and disconnecting the prescribed subject within a prescribed time period.