EV Parallel Charging Apparatus for Simultaneous Inductive and Conductive Power
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Solution Overview
Problem
Conventional electric vehicle (EV) charging systems are inefficient as they can only use either inductive or conductive charging methods simultaneously, leading to prolonged charging times due to power consumption by auxiliary batteries and electronic equipment, and they do not effectively utilize both charging methods simultaneously.
Innovation Solution
An EV parallel charging method and apparatus that detects both inductive and conductive charging inputs, compares their powers, and selectively applies them to high-voltage batteries and auxiliary systems to optimize charging efficiency by inactivating low-voltage converters and using relay switches to manage power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If only one charging method (inductive or conductive) is used at a time, then the charging system is simple to control, but the charging time is prolonged and charging efficiency is reduced
Solution Approach 1:
The patent combines both inductive charging and conductive charging methods into a single parallel charging system. The controller manages multiple charging inputs simultaneously, allowing the EV to receive power from both inductive and conductive sources at the same time, thereby significantly reducing charging time while maintaining system controllability through centralized management.
Solution Approach 2:
The charging system is designed with multi-functionality to accept both inductive and conductive charging methods. The vehicle equipment includes both a reception pad for inductive charging and a charging inlet for conductive charging, enabling the system to universally handle different charging types and optimize power utilization from available sources.
2Use of energy by moving object
If power is used to charge auxiliary battery and drive electronic equipment during high-voltage battery charging, then the vehicle systems are powered, but the actual charging power for the high-voltage battery is reduced by 1/3 to 1/4
Solution Approach 1:
The patent segments the power distribution by introducing a DC-to-DC converter that separately manages power flow to the auxiliary battery and electronic equipment. During parallel charging, the system can selectively control power allocation, directing charging power primarily to the high-voltage battery while independently managing auxiliary power needs, thereby improving overall power utilization efficiency and charging speed.
Solution Approach 2:
The system performs preliminary action by pre-charging the auxiliary battery before or during the high-voltage battery charging process. The controller monitors the state of charge of the auxiliary battery and activates the DC-to-DC converter to transfer power from the high-voltage battery to the auxiliary battery when needed, ensuring that auxiliary systems are powered without significantly impacting the main charging process.
3Adaptability or versatility
If both inductive and conductive charging capabilities are equipped in the EV, then charging method flexibility is improved, but the system cannot utilize both methods simultaneously leading to resource underutilization
Solution Approach 1:
The patent merges both inductive and conductive charging capabilities into a unified parallel charging system. The vehicle equipment includes both a reception pad for inductive charging and a charging inlet for conductive charging, enabling the system to universally handle different charging types and optimize power utilization from available sources.
Solution Approach 2:
The controller implements feedback mechanisms to monitor the availability and status of both inductive and conductive charging inputs. Based on real-time feedback about which charging sources are available and their power levels, the controller dynamically optimizes the charging strategy to maximize the utilization of both charging methods simultaneously, preventing resource underutilization.
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 significantly reduces the charging time for high-voltage batteries by allowing simultaneous use of both charging methods, enabling independent control of low-voltage and high-voltage batteries and optimizing power utilization.
Implementation Method 1
a vehicle assembly (VA) (i.e., a reception pad in the VA) mounted on the EV makes an inductive resonance coupling with a transmission pad of the GA located in the charging station or the charging spot, and charges the battery in the EV using power transferred from the GA through the inductive resonance coupling
Data Source
AI summary
An electric vehicle (EV) parallel charging method may comprise determining whether a parallel charging input is detected or not, the parallel charging input being an input that both a conductive charging input and an inductive charging input are sensed; in response to determining that the parallel charging input is detected, comparing a power of the conductive charging input with a power of the inductive charging input; selecting an input applied to a high-voltage battery and an input applied to at least one of an auxiliary battery and a load based on a result of the comparison; and performing a parallel charging operation for the high-voltage battery and at least one of the auxiliary battery and the load by using powers supplied from the selected inputs.