EV Charging Power Buffering With Energy Storage Bank Control
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Solution Overview
Problem
The increasing demand for electric vehicle charging is straining the electric power system, leading to instability and reduced convenience due to unpredictable and variable power usage patterns, especially in environments with multiple chargers and users.
Innovation Solution
An electric vehicle charging system incorporating an energy storage bank and a controller that manages power distribution by storing excess power during low demand and using it during high demand, ensuring stable and efficient charging through smart grid management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple chargers are supplied with electric power from the power system, then the charging capacity for electric vehicles is improved, but the stability of the power system deteriorates due to unpredictable power usage patterns
Solution Approach 1:
The energy storage bank stores electric power in advance during periods when power demand is low or power supply exceeds demand. This preliminary energy accumulation allows the system to provide charging capacity without immediately drawing from the power system, thereby maintaining power system stability while enabling multiple chargers to operate.
Solution Approach 2:
The energy storage bank acts as an intermediary between the power system and the multiple chargers. It buffers the unpredictable power usage patterns of chargers from the power system, absorbing excess power when available and supplying power during peak demand, thus decoupling the stability requirements of the power system from the high productivity needs of multiple chargers.
2Reliability
If energy storage bank stores excess electric power, then the stability of power supply to electric power customer is improved, but the device complexity increases
Solution Approach 1:
The energy storage bank serves multiple functions: it stores excess power from the power system, supplies power to chargers during peak demand, and stabilizes the power supply to the electric power customer. By consolidating these functions into a single component, the system achieves improved power supply stability without proportionally increasing overall system complexity.
Solution Approach 2:
The controller automatically manages the energy storage bank's charging and discharging operations based on real-time power supply and demand conditions. This self-service control mechanism eliminates the need for complex external management systems, allowing the energy storage bank to maintain power supply stability while keeping the added complexity minimal.
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
The system maintains power stability and convenience by optimizing power usage, preventing outages and enhancing the lifespan of the energy storage bank through intelligent power allocation.
Implementation Method 1
an energy storage bank configured to selectively store at least a portion of electric power supplied to an electric power customer
Data Source
AI summary
An embodiment electric vehicle charging system includes an energy storage bank configured to selectively store electric power supplied to an electric power customer, an electric vehicle charger configured to charge an electric vehicle with the electric power supplied to the electric power customer or with energy stored in the energy storage bank, and a controller configured to determine, based on meter data of an electric power meter measuring the electric power supplied to the electric power customer and an electric power reference level based on a maximum level of electric power supplied to the electric power customer, whether to store the electric power supplied to the electric power customer in the energy storage bank.