Portable EV Charging Device for Vehicle-to-Vehicle DC Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electric vehicles face risks of immobilization due to limited battery autonomy and charger failures, especially when onboard chargers are absent, leading to safety concerns and potential battery depletion.
Innovation Solution
A portable and removable charging device that can connect between the batteries of two electric vehicles, converting input direct current into output direct current, and includes a control system for power management and information exchange, allowing for safe and efficient charging even without a fixed charger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electric vehicles rely on fixed external chargers for battery recharging, then charging infrastructure is established, but vehicles face immobilization risks when chargers fail or autonomy is limited
Solution Approach 1:
The patent enables electric vehicles to charge themselves by allowing a vehicle with a depleted battery to draw power from another vehicle's battery through a portable charging device, eliminating dependency on external charging infrastructure and enabling self-rescue from immobilization
Solution Approach 2:
The portable charging device serves multiple functions: it can connect between two vehicles to transfer power, convert AC to DC for charging, and potentially provide auxiliary power to the control system, making it a versatile solution for various charging scenarios
2Adaptability or versatility
If electric vehicles are equipped with onboard chargers, then charging flexibility is improved, but vehicle weight and cost increase
Solution Approach 1:
The charging capability is segmented from the vehicle and placed in a separate portable device that can be shared among multiple vehicles, allowing vehicles without onboard chargers to access charging functionality when needed, thus reducing individual vehicle weight and cost
Solution Approach 2:
The portable charging device acts as an intermediary between two vehicles, enabling power transfer without requiring either vehicle to have a permanently installed onboard charger, thus providing charging flexibility without the weight penalty
3Ease of operation
If portable charging devices are used for vehicle-to-vehicle charging, then charging accessibility is improved, but power conversion efficiency may be reduced
Solution Approach 1:
The portable charging device performs only the necessary AC to DC conversion when needed, rather than continuously operating, and uses auxiliary power supply means to maintain control system operation with minimal energy consumption, reducing overall energy loss while maintaining accessibility
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
The solution enhances the safety and usability of electric vehicles by providing a backup charging capability, preventing immobilization and ensuring safe battery charging through direct current conversion and power management between vehicles.
Implementation Method 1
the charging device being adapted for converting the input current into output current
Implementation Method 2
it is known to use charging devices making it possible to convert the alternating current from the electricity distribution grid into appropriate direct current for charging the battery
Data Source
AI summary
The invention first relates to a charging device (1) adapted for being connected on the one hand to a battery of a first electric vehicle (14), and on the other hand to a battery of a second electric vehicle (12), for being supplied with direct input current by the battery of the first electric vehicle (14), and for supplying the battery of the second electric vehicle (12) with a direct output current.The invention also relates to a charging method using this charging device.