Dynamic Power Allocation in EV Charging Stations
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Solution Overview
Problem
Existing charging systems for electric vehicles fail to meet the diverse charging requirements of different vehicles, leading to insufficient or excess power distribution and resource waste due to equal power allocation from charging piles.
Innovation Solution
The implementation of a charging method and device with multiple second charging modules that supplement power when needed, utilizing an energy storage apparatus to determine power allocation based on vehicle requirements and the state of charge, reducing waste by optimizing power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If equal power allocation is used from charging piles, then the charging system is simple to operate, but it results in insufficient power for some charging piles and excess power for others, failing to meet diverse charging requirements
Solution Approach 1:
The charging system dynamically adjusts power allocation based on real-time detection of vehicle battery types and charging power requirements. The controller continuously monitors and reallocates power from the power grid and energy storage apparatus to meet varying charging demands, transforming the static equal-power system into a dynamic adaptive one.
Solution Approach 2:
The charging pile is designed with multi-functionality to serve different vehicle types (pure electric and hybrid) with different battery configurations. By integrating detection capabilities, dynamic power allocation algorithms, and multiple power sources (power grid and energy storage apparatus), the system universally accommodates diverse charging requirements while maintaining operational simplicity for users.
2Loss of energy
If equal power allocation is used from charging piles, then the control system remains simple, but it leads to waste of resources due to excess power for some charging piles
Solution Approach 1:
The system implements feedback mechanisms where the controller continuously detects the actual charging power requirements of connected vehicles and the available power from the power grid and energy storage apparatus. Based on this feedback, the controller automatically adjusts power allocation in real-time, ensuring that power is distributed according to actual needs rather than equally, thereby eliminating energy waste while maintaining automated control.
Solution Approach 2:
The charging system performs self-service by automatically detecting vehicle requirements and autonomously allocating power without requiring manual user input or complex user-side control. The controller intelligently manages power distribution between the power grid and energy storage apparatus based on real-time conditions, reducing both energy waste and the automation burden on users.
3Reliability
If energy storage apparatus supplies power continuously, then charging requirements are met, but the energy storage apparatus may be damaged when its power is low
Solution Approach 1:
The controller acts as an intermediary that intelligently manages power flow between the power grid, energy storage apparatus, and charging vehicles. It monitors the state of charge of the energy storage apparatus and dynamically adjusts power allocation, using the power grid as a supplemental source when the energy storage apparatus power is low, thereby protecting the energy storage apparatus from damage while ensuring continuous reliable charging.
Solution Approach 2:
The system implements beforehand cushioning by monitoring the power level of the energy storage apparatus in advance and preparing alternative power sources (power grid) before the energy storage apparatus is depleted. This prevents the harmful effect of damaging the energy storage apparatus by ensuring that power is not drawn beyond its safe limits, while maintaining charging reliability through pre-arranged power supplementation.
Data Source
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AI summary
The embodiments of the present disclosure provide a charging method and an energy storage charging device, wherein the charging method comprises: in response to a charging request sent by a device to be charged, acquiring a state of charge of an energy storage apparatus, and comparing a charging power of the device to be charged with a first supply power of a first charging module corresponding to a charging gun connected to the device to be charged, to obtain a comparison result; in response to the comparison result indicating that the first charging module corresponding to the device to be charged does not meet a power supply requirement, determining power to be allocated based on the charging power and the first supply power; based on a second supply power of each second charging module and the power to be allocated, determining at least one second charging module that meets an allocation condition as a target charging module; in response to the state of charge being less than a preset threshold, disconnecting an energy storage switch to supply power to the first charging module corresponding to the device to be charged and the target charging module through a power grid connected to the energy storage charging device.