Wireless Jump Start for EV Auxiliary Battery Charging
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Solution Overview
Problem
Conventional electric vehicles require a functioning auxiliary battery to initiate wireless charging, leading to manual intervention with jumper cables when the auxiliary battery is discharged, which is inconvenient and unsafe.
Innovation Solution
A wireless power transfer method that allows charging of an electric vehicle's auxiliary battery using a secondary jump start power, enabling the vehicle's controller to drive the auxiliary power supply and subsequently charge the high-voltage battery even when the auxiliary battery is fully discharged, eliminating the need for manual jumper cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless charging is implemented in electric vehicles, then charging convenience is improved, but the system becomes inoperable when the auxiliary battery is discharged
Solution Approach 1:
The patent applies preliminary action by providing a jump-start power supply device that can pre-charge the auxiliary battery before wireless charging is initiated. When the auxiliary battery is discharged, the jump-start device automatically or manually activates to restore power to the control system, enabling the wireless charging process to proceed without manual intervention with jumper cables.
Solution Approach 2:
The jump-start power supply device acts as an intermediary between the high-voltage battery and the auxiliary battery. It mediates the power transfer by converting high-voltage battery power to the appropriate voltage level for charging the auxiliary battery, thereby enabling the control system to function and initiate wireless charging when the auxiliary battery is discharged.
2Adaptability or versatility
If manual jumper cables are used to start the control system when auxiliary battery is discharged, then the vehicle can be operated, but safety risks and operational complexity increase
Solution Approach 1:
The system applies self-service through automatic detection and activation of the jump-start power supply device. When the control system detects that the auxiliary battery is discharged, it automatically activates the jump-start device to restore power, eliminating the need for manual intervention with jumper cables and reducing safety risks associated with manual battery connection.
Solution Approach 2:
The patent replaces the mechanical system of manually connecting jumper cables with an automated electrical system. The jump-start power supply device uses electronic control and automatic detection to restore auxiliary battery power, substituting the manual mechanical operation with an automated electrical process that is safer and more convenient.
3Reliability
If the auxiliary battery is continuously monitored and automatically recharged, then charging reliability is improved, but system complexity increases
Solution Approach 1:
The jump-start power supply device is designed with multi-functionality, serving both as a backup power source for the auxiliary battery and as a component of the wireless charging system. By integrating these functions, the patent avoids adding separate complex systems while maintaining charging reliability through automatic auxiliary battery recharging when needed.
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
Enables convenient and safe wireless charging of electric vehicles without the need for manual intervention, ensuring continuous operation even when the auxiliary battery is discharged, by using a switched mode power supply to provide power to the controller and convert high-voltage battery power for charging the auxiliary battery.
Implementation Method 1
transmitting, by the EV charging apparatus, a primary jump start power according to the wireless jump start request message to the EV; driving an auxiliary power supply device provided in the EV by a secondary jump start power induced by the primary jump start power
Implementation Method 2
The EV may receive power from the EV charging apparatus through coupling between a ground assembly (GA) coil of the EV charging apparatus and a vehicle assembly (VA) coil of the EV
Data Source
AI summary
A wireless power transfer (WPT) method based on a state of an auxiliary battery and an electric vehicle (EV) for the same includes receiving, by an EV charging apparatus, a wireless jump start request message from a user terminal; transmitting, by the EV charging apparatus, a primary jump start power according to the wireless jump start request message to the EV; driving an auxiliary power supply device provided in the EV by a secondary jump start power induced by the primary jump start power; driving a controller of the EV based on a preset power outputted from the auxiliary power supply device; and charging, by the controller of the EV, an auxiliary battery of the EV.