Peer-to-Peer DC Fast Charging Using Motor Inductance Control
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Solution Overview
Problem
Existing DC fast-charging systems are often fixedly located and unable to provide sufficient power for rapid vehicle charging, and mobile systems are inadequate in power delivery.
Innovation Solution
A power system with a multi-phase motor, DC charge plug, traction battery, traction inverter, contactor, and controller that uses motor inductance and inverter switching controls to manage voltage, enabling peer-to-peer fast charging of vehicles or devices at over 50 kW.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a fixed power station is used for DC fast charging, then sufficient power can be delivered, but the system lacks portability
Solution Approach 1:
The patent applies the dynamics principle by transforming the static, fixed power station into a mobile, dynamic charging system. The electric vehicle itself becomes a mobile power source that can move to different locations, providing fast charging capability wherever needed. This resolves the contradiction by making the high-power charging system portable through the vehicle's mobility and integrated power delivery capabilities.
2Adaptability or versatility
If a mobile charging system is used, then portability is achieved, but insufficient power is delivered for rapid charging
Solution Approach 1:
The patent applies the self-service principle by enabling the electric vehicle to serve dual purposes: it is both the powered vehicle and the power source for charging other vehicles. The vehicle uses its own battery system and power electronics to deliver high-power charging to another vehicle, achieving both portability and sufficient power delivery without requiring external infrastructure.
3Adaptability or versatility
If peer-to-peer fast charging is implemented, then portability and flexibility are improved, but system complexity increases
Solution Approach 1:
The patent applies the universality principle by designing the electric vehicle with multi-functional capabilities. The vehicle's power system serves multiple functions: propelling the vehicle, charging the vehicle's own battery, and delivering power to external vehicles or devices. This multi-functionality reduces the need for separate dedicated charging infrastructure, achieving charging flexibility while managing system complexity through shared components.
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 fast charging of vehicles or devices at high power levels, facilitating portable and efficient power transfer between electric vehicles.
Implementation Method 1
the controller being configured to control power by using motor inductance and inverter switching controls to either increase or decrease voltage at the DC charge plug
Data Source
AI summary
Power systems capable of charging chargeable systems at a power greater than or equal to a predetermined value are disclosed. Example embodiments may be a power system for an electric vehicle. The chargeable system may be an electric vehicle. Some embodiments are capable of peer-to-peer fast charging of electric vehicles at a power greater than or equal to 50 kW.