Hybrid Vehicle SOC Control for External Charging Optimization
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Solution Overview
Problem
Hybrid vehicles face inefficiencies in external charging, often resulting in insufficient charging when returning home, as they may not be charged adequately before leaving, leading to increased dependence on internal combustion engines and higher emissions.
Innovation Solution
A control system that inquiries the occupant's intention to visit a charging location and adjusts the state of charge (SOC) target values based on their input, allowing for optimal charging at the destination, such as home, by switching between different SOC control modes and target values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the vehicle is charged at home after returning, then the vehicle can be charged with external power, but the vehicle may leave immediately after charging and thus be charged for a short period or insufficiently charged
Solution Approach 1:
The control device determines in advance whether the vehicle will leave after returning home by checking if the destination is the starting point and comparing time intervals. Based on this preliminary determination, it adjusts the SOC target value before charging begins, ensuring optimal charging amount is set in advance to avoid insufficient charging when the vehicle leaves quickly.
Solution Approach 2:
The system dynamically adjusts the SOC target value based on real-time conditions. When the vehicle is determined to leave soon after returning, a lower SOC target value is set to optimize charging time and amount. This dynamic adjustment allows the charging system to adapt to varying usage patterns and maximize energy reception within available time windows.
2Object-generated harmful factors
If the vehicle frequently returns and leaves without sufficient charging, then the vehicle must rely more on the internal combustion engine, but this increases emissions and reduces environmental protection
Solution Approach 1:
The control device continuously monitors vehicle usage patterns by comparing destination with starting point and analyzing time intervals between arrival and departure. This feedback mechanism allows the system to learn from past behavior and predict future actions, adjusting SOC target values proactively to ensure the vehicle is adequately charged before leaving, thereby reducing reliance on the internal combustion engine and lowering emissions.
3Reliability
If the SOC target value is always set high to ensure sufficient charging, then the vehicle can maintain higher energy levels, but the charging time increases and the vehicle cannot respond efficiently to quick return-and-leave scenarios
Solution Approach 1:
The SOC target value is dynamically adjusted based on predicted vehicle usage patterns. When quick return-and-leave behavior is detected, the target value is lowered to optimize charging time. When prolonged停留 is expected, the target value is raised to ensure sufficient energy availability. This dynamic approach balances reliability and productivity by adapting energy management strategies to actual usage conditions.
Data Source
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AI summary
The present invention contemplates a hybrid vehicle capable of changing an amount to be charged to an electric power storage device in accordance with whether it is externally charged. The hybrid vehicle (100) includes a control device (60) inquiring of an occupant of the vehicle whether the occupant has an intention to go to a charging location for example at home. If so, the control device (60) sets a target value for the electric power storage device's amount of a state (SOC) to have a value smaller than when the occupant does not have an intention to go to the charging location. This allows as much energy as possible to be received at the charging location and a vehicle can thus be obtained that less depends on an internal combustion engine and contributes to environmental protection.