Hybrid Battery Charging for Peak Grid Load Balancing
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Solution Overview
Problem
The increasing demand for electric vehicle charging poses a significant burden on existing power grids, leading to risks of power trips and outages, especially during peak electricity consumption hours, necessitating a solution to manage power grid load while meeting user energy demands.
Innovation Solution
A hybrid battery charging method that classifies batteries into groups based on their levels and allocates charging currents accordingly, using a processing unit to manage charging schedules and distribute currents efficiently, thereby reducing grid load during peak hours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If maximum charging current is applied to all batteries during off-peak hours, then charging efficiency is improved, but power grid load increases during peak hours
Solution Approach 1:
The system performs preliminary charging actions during off-peak hours by storing batteries at the battery energy station and charging them when power grid load is low. This anticipates future charging needs and shifts energy consumption to periods when the grid has excess capacity, thereby improving charging efficiency without increasing peak load.
Solution Approach 2:
The system implements periodic charging cycles that alternate between charging during off-peak hours and discharging during peak hours. Batteries are charged when electricity demand is low and then used to supply power during high-demand periods, creating a rhythmic pattern of energy storage and release that smooths out grid load fluctuations.
2Speed
If batteries are charged according to originally designed rules during off-peak hours, then charging speed is improved, but user energy demand cannot be met during peak hours
Solution Approach 1:
The system dynamically adjusts charging schedules based on real-time power grid conditions and user demand patterns. During off-peak hours, batteries are charged at maximum speed, while during peak hours, the system automatically switches to discharging mode to meet user energy demands, creating a flexible response that adapts to changing conditions.
Solution Approach 2:
The system changes operational parameters by switching between charging and discharging modes based on the time of day and grid conditions. The same battery infrastructure serves dual purposes: rapid charging during off-peak hours and power supply during peak hours, effectively changing the functional parameter from energy absorption to energy release.
3Reliability
If power grid load is reduced during peak hours through energy regulation, then power grid stability is improved, but battery charging needs are not fully met
Solution Approach 1:
The battery energy station acts as an intermediary between the power grid and end-users. It absorbs excess energy during off-peak hours when grid stability is not a concern, then releases stored energy during peak hours to meet user demands without overloading the grid. This intermediary role decouples user charging needs from direct grid load, maintaining stability while ensuring service continuity.
Solution Approach 2:
The system extracts the charging function from the immediate power grid connection by using stored batteries as an energy buffer. Instead of drawing all power directly from the grid in real-time, the system separates energy storage from energy delivery, allowing grid load to be managed independently from user service levels.
Data Source
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AI summary
A hybrid battery charging method is characterized by: obtaining a plurality of battery levels corresponding respectively to a plurality of batteries (112); classifying the plurality of batteries (112) into a first group and a second group; performing a first energy allocation operation on each battery (112) in the first group; performing a second energy allocation operation on each battery (112) in the second group; and charging each individual battery (112) based on the corresponding current thus allocated to each individual battery (112). A battery energy station (100) is characterized by: an energy module (120) having an electric current; a battery storage system (110) including a plurality of batteries (112); and a processing unit (140) coupled to the energy module (120) and the battery storage system (110), and configured to implement the hybrid battery charging method.