Charging Control Device Electrical Insulation Safety
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electric vehicles, especially those using pantographs for charging, face challenges in preventing travel initiation during battery charging, as interlock settings are not feasible when pantographs are in contact with the charger, risking unintended movement.
Innovation Solution
A charging control device with a power reception unit, charging instruction output unit, and travel instruction output unit, which electrically insulates the battery and travel motor during charging and connects them for travel, using buttons or algorithms to manage these states, ensuring safe charging and travel modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interlock setting is used to prevent vehicle travel during charging, then travel safety is improved, but the system becomes inapplicable to pantograph-based charging systems where the pantograph remains in contact with the charger after charging completion
Solution Approach 1:
The patent extracts the interlock function from the physical connector state and implements it through electrical continuity detection. Instead of relying on the mechanical presence of a plug, the system detects whether the battery and motor are electrically connected to determine if travel is permitted, making the interlock applicable to both socket-based and pantograph-based charging systems
Solution Approach 2:
The patent replaces the mechanical interlock mechanism (physical plug connection) with an electrical detection mechanism. The control device monitors electrical continuity between the battery and motor through control lines, substituting mechanical presence detection with electrical state detection, thereby enabling universal application across different charging architectures
2Duration of action of stationary object
If the pantograph remains in contact with the charger after charging completion, then continuous power supply capability is improved, but the ability to prevent unintended vehicle travel during charging deteriorates
Solution Approach 1:
The patent implements feedback by continuously monitoring the electrical continuity state between battery and motor through control lines. The control device receives feedback signals indicating whether the secondary battery is in a state where travel should be prohibited, and automatically adjusts travel permission based on this feedback, ensuring reliable travel prevention regardless of pantograph contact status
Solution Approach 2:
The patent introduces control lines as an intermediary mechanism to detect the charging state. These control lines serve as mediators between the charging system and the travel control system, transmitting information about the charging state without requiring direct mechanical interlocking, thus enabling travel prevention while maintaining pantograph contact flexibility
Data Source
AI summary
A charging control device includes a power reception unit, a charging instruction output unit, and a travel instruction output unit. The power reception unit receives power from a power supply device when the power reception unit is present in a power supply area where the power from the power supply device can be supplied. The charging instruction output unit outputs a charging instruction relating to charging of a secondary battery using the power received by the power reception unit. The travel instruction output unit outputs a travel instruction relating to traveling of a vehicle provided with the charging control device. The secondary battery and a travel motor are electrically insulated from each other when the charging instruction output unit outputs a charging start instruction as the charging instruction for the secondary battery, and are electrically connected to each other when the travel instruction output unit outputs a travel start instruction for the vehicle.