EV Charger Power Source Switching for Grid-Stable Fast Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing demand for electric vehicle charging leads to power consumption surges, causing limitations and instability in the power grid, necessitating a reliable charger and energy storage system that can manage power supply effectively.
Innovation Solution
An energy storage device connected to the grid and a charger that can switch or merge power supply sources, using vanadium ion batteries to provide stable power, allowing for high C-rate charging and managing power distribution based on grid conditions, and offering users a user interface to select charge methods and periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a charger for electric vehicles is provided in various spaces, then the charging service coverage is improved, but the power consumption of the grid increases and causes surge in power consumption
Solution Approach 1:
An energy storage device is introduced as an intermediary between the power grid and the charger. The energy storage device stores electricity during periods of low demand and supplies power during high demand periods, thereby enabling charging services in various spaces without causing surge in grid power consumption
Solution Approach 2:
The energy storage device performs preliminary action by storing electricity in advance during periods when power demand is low. This pre-stored electricity is then used to supply power during periods of high demand, preventing power consumption surges while maintaining charging service availability
2Adaptability or versatility
If the power consumption of the grid increases due to charger usage, then the charging service is expanded, but the power supply stability deteriorates and affects other electric components
Solution Approach 1:
The energy storage device acts as a buffer and intermediary that decouples the charger's power consumption from the grid. It absorbs the variable power demand of the charger and provides stable power output, thereby preventing disruptions to other electric components while enabling charging service expansion
3Speed
If high C-rate charging is enabled for fast charging, then the charging speed is improved, but the power consumption surge increases and grid overload risk rises
Solution Approach 1:
The energy storage device performs preliminary charging at high C-rate during periods of low grid demand or when excess power is available. This allows fast charging capability to be maintained while avoiding power consumption surges during peak demand periods, as the energy storage device can supply power from its stored energy
4Productivity
If the charger provides charge service continuously, then the productivity is improved, but the grid power supply becomes unreliable and surge in power consumption occurs
Solution Approach 1:
The energy storage device enables continuous charging service by maintaining a steady power supply. It charges during periods of low demand and discharges during periods of high demand or grid instability, ensuring uninterrupted charging productivity while preventing grid power supply issues
Solution Approach 2:
The energy storage device serves as a mediator that buffers between the intermittent grid power supply and the continuous charging service requirement. It smooths out power fluctuations and ensures reliable, continuous power delivery to the charger regardless of grid conditions
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
Ensures reliable and efficient power supply to electric vehicles by stabilizing grid power consumption, enabling high-speed charging while minimizing grid overload, and providing users with flexible charging options through a user-friendly interface.
Implementation Method 1
using vanadium ion batteries to provide stable power, allowing for high C-rate charging
Data Source
AI summary
The present disclosure relates to a charger connecting to an energy storage device, and a method of providing a user interface thereof, and the charger of one embodiment comprises a power supply part receiving electric power from any one or more supply source of a grid or an energy storage device, an interface part providing an interface for selecting any one of a charge cost method or a charge period method and an interface for setting a charge cost or a charge period, based on the selected method, a charger controller determining a charging price unit of a charge cost or a charge period depending on the sort of a supply source, and a charge part proceeding with charge based the period or cost selected at the interface part.