Vehicle Control Device for Dynamic Charging Current Adjustment
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Solution Overview
Problem
Conventional vehicle charging systems, particularly those using quick chargers, do not allow auxiliary devices to be driven during charging, which can prolong charging time and inconvenience users, while systems allowing auxiliary device operation during AC charging are inefficient due to long charging times.
Innovation Solution
A vehicle-mountable control device that determines whether to permit auxiliary device driving mode based on the power feeding facility's characteristics, such as electric power supply magnitude and type, allowing auxiliary device operation during DC charging without excessively impeding other users, by using a determination unit and information obtainment unit to assess the facility information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If auxiliary device driving mode is permitted during DC charging, then user convenience is improved, but charging time may be prolonged
Solution Approach 1:
The control device dynamically adjusts the charging current parameter based on the operating state of auxiliary devices. When auxiliary devices are driven, the charging current is reduced to prevent excessive power consumption that would prolong charging time. When auxiliary devices are not driven, the charging current is maximized to complete charging quickly. This parameter adjustment resolves the contradiction by adapting charging speed to auxiliary device usage.
Solution Approach 2:
The system transitions from a static charging mode to a dynamic charging mode that automatically adjusts based on auxiliary device operation. The control device continuously monitors whether auxiliary devices are driven and switches between different charging current levels accordingly. This dynamic adaptation allows the system to balance user convenience with charging efficiency.
2Ease of operation
If auxiliary device driving mode is permitted during quick charging, then user convenience is improved, but charging efficiency deteriorates
Solution Approach 1:
The control device changes the charging current parameter from high current (quick charging mode) to lower current (standard charging mode) when auxiliary devices are driven. This parameter change prevents the charging efficiency from deteriorating excessively by reducing the power consumed by auxiliary devices during quick charging, thereby maintaining better overall charging performance.
3Ease of operation
If auxiliary device driving mode is always permitted, then user convenience is improved, but other users' convenience is impeded
Solution Approach 1:
The control device changes the permission parameter for auxiliary device driving mode based on the detected charging facility type. When a quick charging facility is detected, the permission parameter is set to prohibit auxiliary device driving. When a standard charging facility is detected, the permission parameter is set to allow auxiliary device driving. This adaptive parameter change resolves the contradiction by making the system behavior appropriate for different facility contexts.
Solution Approach 2:
The system transitions from a fixed permission mode to a dynamic permission mode that automatically adjusts based on the charging facility type. The control device detects whether the connected facility is a quick charger or standard charger and switches the auxiliary device permission state accordingly. This dynamic adaptation allows the system to accommodate both quick charging users and standard charging users appropriately.
Data Source
AI summary
A vehicle-mountable control device configured to control a vehicle including a charging port for DC power and an auxiliary device includes a determination unit and an information obtainment unit. The information obtainment unit is configured to obtain prescribed facility information about a power feeding facility. The determination unit is configured to permit an auxiliary device driving mode when it is determined that the power feeding facility corresponds to the auxiliary device driving mode based on the facility information, and not permit the auxiliary device driving mode when it is determined that the power feeding facility does not correspond to the auxiliary device driving mode based on the facility information.