EV Charge Schedule Coordination for Overlapping Timer Requests

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Solution Overview

Problem

Existing vehicle charging systems often perform or refrain from charging against the user's intention due to overlapping timer charge settings, my room mode requests, or vehicle system requests, leading to inefficiencies and misalignment with user preferences.

Innovation Solution

A vehicle system with a control device that coordinates charging schedules and electric load operations based on user input, prioritizing user intentions by adjusting charge start and end times and managing requests such as my room mode and vehicle system needs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple timer charge schedules are set with different charge start times and charge end times, then charging flexibility is improved, but charging conflicts occur when schedules overlap

Engineering Contradiction:

Improvecharging flexibilityVSAvoidcharging conflict

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The control device detects overlapping charge time bands between multiple timer charge schedules in advance and performs preliminary coordination by selecting appropriate charge start times and charge end times from the overlapping schedules. This prevents charging conflicts before they occur by proactively resolving schedule overlaps.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The control device continuously monitors the charge time bands of multiple timer charge schedules and provides feedback when overlaps are detected. Based on this feedback, the system automatically coordinates the schedules by selecting appropriate charge start times and charge end times to eliminate conflicts.

Inventive Principle:

Principle #23Feedback

2Ease of operation

If charge start time is advanced to accommodate electric load operation, then user convenience is improved, but charge time is reduced

Engineering Contradiction:

Improveuser convenienceVSAvoidcharge time

Core Design Contradiction:

Ease of operationVSDuration of action of moving object

Solution Approach 1:

The control device dynamically adjusts the charge start time and charge end time based on the detected overlapping schedules and electric load operation requirements. When a timer charge schedule overlaps with electric load operation, the system advances the charge start time to allow load operation first, then coordinates the charge time band to ensure sufficient charging duration.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12533982B2Charge control system for electric vehicle

Publication Date: 2026.01.27 TOYOTA JIDOSHA KK

AI summary

A vehicle includes a power reception unit receiving power from outside of the vehicle, a power storage device, and a control device performing control for charging the power storage device in accordance with a schedule set for timer charge. In the case where a charge time band of a first schedule defining a charge start time and a charge end time and a charge time band of a second schedule defining a charge start time and a charge end time overlap each other, the control device starts charge at the earlier one of the charge start time of the first schedule and the charge start time of the second schedule when the charge start times are different, and ends charge at the later one of the charge end time of the first schedule and the charge end time of the second schedule when the charge end times are different.