Electric Vehicle Charging Control Apparatus with Dynamic Mode Switching
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Solution Overview
Problem
Existing charging control methods for electric vehicle batteries, such as constant power and constant voltage charging, result in lower charging efficiency and longer charging times, with power consumption by accessories increasing inefficiency, and require restrictions to prevent overcharging, leading to suboptimal economic efficiency.
Innovation Solution
A charging control apparatus with a switching device that adjusts between charging modes based on user requests, using a charging efficiency computation device to determine optimal charging periods and a state of charge computation device to ensure full charging, incorporating a display unit to visualize charging efficiency and state, allowing users to manage charging efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant voltage charging is used to maintain battery voltage at a constant level, then overcharge is prevented, but charging time increases and charging efficiency decreases
Solution Approach 1:
The patent dynamically switches between constant power charging mode and constant voltage charging mode based on real-time charging efficiency calculations. The system transitions from static charging modes to a dynamic hybrid mode that adapts charging parameters based on battery state and efficiency metrics, thereby reducing overall charging time while maintaining overcharge prevention.
Solution Approach 2:
The patent changes charging parameters by switching between different charging modes (constant power vs. constant voltage) based on calculated charging efficiency. The system monitors battery voltage, current, and power consumption to determine when to switch modes, optimizing the balance between charging speed and safety.
2Productivity
If constant power charging is used in the initial stage, then charging speed is high, but charging efficiency decreases when voltage reaches predetermined value
Solution Approach 1:
The patent implements dynamic mode switching between constant power and constant voltage charging based on real-time efficiency calculations. The system continuously monitors charging parameters and transitions modes to maintain optimal charging efficiency throughout the charging process, rather than using a fixed charging mode.
Solution Approach 2:
The patent uses feedback from charging efficiency calculations to control mode switching. The system computes charging efficiency based on power consumption, voltage, and current data, then uses this feedback to determine when to switch between charging modes, creating a closed-loop control system that optimizes both speed and efficiency.
3Length of moving object
If charging is continued until full charge to maximize cruising distance, then vehicle range is maximized, but charging efficiency becomes low in later stages
Solution Approach 1:
The patent dynamically adjusts charging strategy based on user needs and real-time efficiency calculations. The system can switch between prioritizing full charge (for maximum range) and prioritizing charging efficiency (for economic operation), providing adaptive charging control rather than a fixed approach.
Solution Approach 2:
The patent changes charging parameters by switching modes based on battery state of charge and efficiency metrics. The system transitions from constant power charging at lower states of charge to constant voltage charging at higher states of charge, optimizing the balance between range and efficiency.
4Reliability
If power is restricted to prevent overcharge, then battery safety is ensured, but charging time increases
Solution Approach 1:
The patent implements dynamic power adjustment through mode switching between constant power and constant voltage charging. The system adapts power delivery based on real-time battery state and efficiency calculations, maintaining safety while minimizing charging time through optimized power management.
Data Source
AI summary
A charging control apparatus for an electric vehicle comprises: a charging efficiency computation device 21 for computing the charging efficiency of a driving battery 2; a state of change computation device 22 for computing the state of change of the driving battery 2; and a switching device 25 for switching, in response to a request from a user of the vehicle, between a first charging mode in which the charger 7 is controlled based on the charging efficiency to charge the driving battery 2, and a second charging mode in which the charger 7 is controlled based on the state of change to charge the driving battery 2.