Regenerative Power Distribution for Direct EV Load and V2L Supply
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Solution Overview
Problem
Existing electric vehicles require two energy conversion processes to supply V2L power or electric load using regenerative braking, leading to decreased energy efficiency and increased heating, which is addressed by directly converting and distributing regenerative power without battery storage.
Innovation Solution
An apparatus and method that includes a controller to manage regenerative power distribution, an inverter to convert power for electric loads and V2L terminals, and a distributor to direct power to appropriate terminals based on battery state and power requirements, allowing direct supply of regenerative power to loads and V2L without intermediate battery storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If regenerative power is stored in battery through two energy conversion processes, then voltage compatibility is achieved, but energy efficiency decreases and heating increases
Solution Approach 1:
The patent extracts the intermediate battery storage step from the traditional power conversion chain. By directly converting regenerative power to V2L power through a single conversion process, the system eliminates the need to store energy in the battery first, thereby reducing energy losses and heating that occur during multiple conversion cycles
Solution Approach 2:
The inverter is designed to perform multiple functions: it can convert regenerative power directly to V2L power, convert battery power to V2L power, and manage power distribution to various loads. This multi-functionality allows the system to bypass the traditional two-step conversion process when supplying V2L power, improving energy efficiency
2Loss of energy
If regenerative power is directly converted to V2L power, then energy efficiency improves, but voltage matching control complexity increases
Solution Approach 1:
The control unit continuously monitors the voltage levels of both the regenerative power source and the V2L power requirement, and adjusts the conversion process in real-time to ensure proper voltage matching. This feedback mechanism simplifies the control complexity by automating the voltage coordination process
Solution Approach 2:
The inverter acts as an intermediary device between the regenerative power source and the V2L load. It handles the voltage conversion and matching complexities internally, presenting a simplified interface to both the power source and the load, thereby reducing overall system control complexity
3Temperature
If two energy conversion processes are used, then voltage compatibility is ensured, but heating value increases
Solution Approach 1:
The patent enables continuous power flow from the regenerative braking system directly to the V2L load without interruption for battery storage. This continuous action reduces the number of conversion events, thereby minimizing the cumulative heating and energy losses that would occur in traditional multi-step conversion processes
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
Improves energy efficiency by reducing energy loss and heating, saves electricity bills, enhances driver convenience, and increases marketability of electric vehicles.
Implementation Method 1
an inverter operatively connected to the controller and configured to convert the regenerative power into at least one power of a first power for an electric load, a second power for a V2L terminal
Data Source
AI summary
An apparatus for converting and distributing regenerative power includes: a controller configured to permit or restrict a V2L function depending on a state of charge (SOC) value of a battery, compare regenerative power generated from a motor according to regenerative braking with a preset electric load required power and/or a V2L required power, and control an operation of converting the regenerative power according to a comparison result and distribution of the converted regenerative power; an inverter configured to convert the regenerative power into at least one power of a first power for an electric load, a second power for a V2L terminal, and power of the battery; and a main distributor configured to distribute the first power to the electric load terminal when the V2L function is restricted.