EV Charging Power Distribution with Energy Storage and Dynamic Control
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Solution Overview
Problem
Existing electric vehicle supply equipment (EVSE) cannot meet the increasing charging requirements of electric vehicles due to rising numbers of vehicles and charging times, leading to inefficiencies and potential damage from excessive energy storage device discharge.
Innovation Solution
A power distribution system comprising an alternating-current source, an energy storage device, a charging module with multiple units, and a power management module that selects an orderly charging mode based on total supply and required power, including average, dynamic, FIFO, and dynamic proportional modes, to efficiently distribute power among charging units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing EVSE is used to charge electric vehicles, then charging can be provided, but the system cannot meet the increasing charging requirements of multiple vehicles and high power demand
Solution Approach 1:
The system divides the charging module into multiple independent charging units (first charging unit, second charging unit, etc.), each capable of serving different electric vehicles. This segmentation allows the system to handle multiple charging requests simultaneously and scale capacity by adding more units to the parallel configuration.
Solution Approach 2:
The patent combines multiple power sources (energy storage device and alternating-current source) and multiple charging units into a unified power distribution system. The power management module integrates control of these components to work together, enabling the system to meet higher power demands that a single source or unit could not satisfy alone.
2Productivity
If the energy storage device discharges to meet high power demand, then charging requirements are met, but the service life of the energy storage device is reduced due to excessive discharge
Solution Approach 1:
The power management module acts as an intermediary that coordinates between the energy storage device, alternating-current source, and charging units. It monitors the state of charge and discharge rate of the energy storage device, and when discharge exceeds safe thresholds, it intervenes by reducing power allocation or activating the alternating-current source to compensate, thereby protecting the energy storage device while maintaining charging capability.
Solution Approach 2:
The system dynamically adjusts the power distribution strategy based on real-time conditions. The power management module continuously monitors the energy storage device's state and modifies discharge rates, switching between different charging units, and coordinating with the alternating-current source to optimize both charging performance and energy storage device longevity under varying load conditions.
3Productivity
If power is distributed to multiple charging units simultaneously, then charging efficiency improves, but power management complexity increases
Solution Approach 1:
The power management module implements feedback control by continuously monitoring the charging status, power consumption, and energy storage device state of each charging unit. Based on this feedback, it dynamically adjusts power distribution to optimize charging efficiency while managing system complexity through automated decision-making algorithms that respond to real-time conditions.
Solution Approach 2:
The system performs preliminary assessment of power requirements and energy storage device capacity before distributing power to charging units. The power management module pre-calculates optimal power allocation strategies and prepares switching configurations, enabling efficient multi-unit operation while reducing management complexity through advance planning rather than reactive control.
Data Source
AI summary
Embodiments of the present disclosure provide a power distribution system and a method for charging multiple electric vehicles. The power distribution system includes: an alternating-current source, configured to provide a first electric power; an energy storage device, configured to provide a second electric power, the first electric power and the second electric power together constitute a total supply power; a charging module, including multiple charging units, where each of the charging units is electrically coupled to the alternating-current source and the energy storage device through an alternating-current bus, and the charging units are used to charge the electric vehicles; and a power management module, performing a signal transmission with the alternating-current source, the energy storage device and the charging module through a signal bus, and being configured to select a corresponding orderly charging mode according to the total supply power and total required power of the charging module.