Vehicle Charger Power Allocation During Charging
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Solution Overview
Problem
The charging time for electric vehicles becomes excessively long or the battery is not charged to the desired level due to a shortage of charging power from the on-board charger caused by power consumption of electric loads during slow charging, leading to increased costs and inefficient energy use.
Innovation Solution
A method and system that calculates the maximum outputtable power of the charger, determines the maximum allowable load power, and controls the electric load to ensure power consumption does not exceed this limit, thereby optimizing charging efficiency by constraining or stopping non-essential loads when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electric loads operate at full power during charging, then the comfort and functionality of the vehicle are improved, but the charging power available to the battery decreases, causing charging time to become excessively long
Solution Approach 1:
The system dynamically adjusts the power allocation between electric loads and battery charging based on real-time conditions. The controller continuously monitors the state of charge, power availability, and load requirements, then adaptively modulates the power distribution to optimize both vehicle comfort and charging efficiency throughout the charging process
Solution Approach 2:
The system changes operational parameters by adjusting the power consumption levels of electric loads during charging. The controller modifies load power settings, adjusts charging rates, and varies operational modes to balance the trade-off between maintaining vehicle comfort and ensuring adequate battery charging power
2Adaptability or versatility
If electric loads consume more power during charging, then the vehicle functionality is enhanced, but the battery charging power becomes insufficient, preventing the battery from reaching the desired charge level
Solution Approach 1:
The system implements a feedback mechanism where the controller continuously monitors the state of charge, power consumption of electric loads, and charging progress. Based on this feedback, the controller adjusts load power levels and charging parameters in real-time to ensure the battery reaches the desired charge level while maintaining necessary vehicle functionality
Solution Approach 2:
The system performs preliminary assessment of power requirements before initiating full charging. The controller evaluates the state of charge, anticipated charging duration, and essential load requirements in advance, then pre-configures power allocation strategies to ensure both charging completion and functional needs are met
3Ease of operation
If the on-board charger provides sufficient power to both battery and electric loads, then both charging and vehicle operation are maintained, but the total power requirement increases, leading to higher costs
Solution Approach 1:
The system applies partial action by providing only the necessary amount of power to electric loads during charging, rather than full power. The controller determines the minimum required power for essential functions and allocates accordingly, reducing unnecessary energy consumption and costs while maintaining adequate vehicle operation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces charging time, ensures the battery is fully charged, and minimizes unnecessary power consumption, thereby reducing costs and improving driver satisfaction.
Implementation Method 1
a charger converting external alternating current power into direct current power
Data Source
AI summary
A method of controlling a vehicle during charging is applied to the vehicle that includes a charger converting external alternating current power into direct current power, and a first battery and an electric load connected to a terminal to which the direct current power converted and output by the charger. The method includes calculating a maximum outputtable power capable of being output by the charger when an operation of the charger is initiated; and calculating a maximum allowable load power capable of being applied to drive the electric load on the basis of the maximum outputtable power, a minimum charging power required to charge the first battery, and a minimum load-requesting power required to operate the electric load.