Battery-Assisted EV Charging System Grid Load Management
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Solution Overview
Problem
The increasing demand for electric vehicle charging infrastructure due to the transition from fossil fuel-based vehicles to electric vehicles requires efficient and flexible charging systems that can handle varying power sources, including the power grid and battery energy storage systems, to support both fast and slow charging modes while ensuring battery health and safety.
Innovation Solution
A battery-assisted electric vehicle charging system that integrates with the power grid and a battery energy storage system (BESS), allowing for simultaneous charging from both sources, with the ability to switch between fast and slow charging modes based on BESS discharge levels, and includes advanced control mechanisms for battery management and communication protocols to optimize energy distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If charging is performed using only the power grid, then the charging system is simple, but the charging speed is limited and cannot provide fast charging capability
Solution Approach 1:
The patent combines the power grid and battery energy storage system into a unified charging infrastructure. The BESS acts as a local energy reservoir that can deliver high-power discharge to enable fast charging, while the power grid provides baseline power and recharges the BESS. This merging allows the system to achieve fast charging speeds without requiring an overly complex grid connection at each charging station.
Solution Approach 2:
The battery energy storage system performs preliminary energy accumulation by charging from the power grid during periods of low demand or excess generation. This stored energy is then rapidly discharged during fast charging events, allowing the system to prepare in advance for high-power delivery without requiring the grid infrastructure to constantly support peak charging loads.
2Productivity
If fast charging is provided using both power grid and BESS, then charging efficiency is improved, but the strain on the grid increases and battery lifespan may be reduced
Solution Approach 1:
The system implements comprehensive monitoring and control mechanisms that continuously track BESS state of charge, charging/discharging rates, grid conditions, and battery health metrics. Based on this feedback, the control system dynamically adjusts operational parameters to optimize charging efficiency while preventing conditions that would harm battery lifespan or grid stability. This includes managing discharge depth and rate to protect battery health.
Solution Approach 2:
The BESS is designed to provide supplemental power rather than bearing the full fast charging load alone. The power grid handles the baseline charging requirements, while the BESS provides partial additional power during fast charging events. This partial action approach allows the system to achieve fast charging capability without excessively stressing either the grid infrastructure or the battery storage system.
3Adaptability or versatility
If BESS is used to supplement power grid, then fast charging capability is achieved, but the device complexity and cost increase
Solution Approach 1:
The battery energy storage system is designed to perform multiple functions within a single integrated platform. It provides fast charging supplementation, grid peak shaving, energy arbitrage, and backup power capability. This multi-functionality allows the system to achieve charging mode flexibility and adaptability without proportionally increasing complexity, as the same hardware infrastructure supports diverse operational modes and use cases.
Data Source
AI summary
The disclosed systems and methods are directed to a battery assisted charging station. A battery system comprising plurality of batteries and a battery management system software controlling the operations of the battery system, function together with a vehicle charging system that charges electric vehicles using one or both of stored power provided by a battery system, and power provided by a utility power grid. The battery system uses the power grid to charge the batteries therein.