Energy Storage Control System for Solar DC Loads
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Solution Overview
Problem
The inefficiencies in solar power generation systems due to unpredictable weather conditions and the need for battery conversion from DC to AC and back to DC, which reduces power efficiency and increases environmental impact by requiring conversion equipment.
Innovation Solution
A method and system for controlling the charging and discharging of energy storage apparatuses based on load-specific power consumption patterns and weather information, optimizing battery charging and discharging levels by classifying loads and using solar and grid-generated power, thereby eliminating the need for conversion equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If battery output is converted to AC and then back to DC to provide power to DC loads, then the system can interface with standard AC infrastructure, but power efficiency deteriorates and additional conversion equipment is required
Solution Approach 1:
The patent extracts and removes the unnecessary AC conversion stage from the power delivery path. By directly connecting the DC battery output to DC loads, the system eliminates the harmful AC-DC conversion process while maintaining adaptability through intelligent power management that can handle both DC and AC load types through dedicated conversion paths.
Solution Approach 2:
The system implements multi-functionality by providing multiple power delivery paths: direct DC connection for DC loads, and dedicated AC conversion equipment for AC loads. This universal approach allows the system to serve both DC and AC infrastructure requirements without forcing all power through inefficient AC conversion.
2Adaptability or versatility
If AC conversion equipment is installed to convert battery DC output to AC, then the system can connect to AC infrastructure, but device complexity increases and environmental impact worsens
Solution Approach 1:
The patent segments the power delivery system into separate DC and AC paths. DC loads receive power directly from the battery through a simple DC connection, while AC loads use dedicated AC conversion equipment. This segmentation reduces overall system complexity by avoiding the need for complex bidirectional conversion equipment and control systems.
Solution Approach 2:
The system introduces dedicated AC conversion equipment as an intermediary only where needed for AC loads, rather than requiring all power to pass through complex conversion stages. This selective intermediary approach minimizes device complexity while maintaining infrastructure compatibility.
3Ease of operation
If battery charging/discharging control is not optimized based on weather and load patterns, then system operation is simpler, but energy efficiency deteriorates and cost increases
Solution Approach 1:
The patent implements feedback mechanisms that monitor weather conditions, solar generation output, battery state of charge, and load patterns. This feedback information is used to dynamically optimize charging/discharging decisions, improving energy efficiency while maintaining automated operation that does not require complex manual intervention.
Solution Approach 2:
The system employs self-service through automated algorithms that independently analyze weather forecasts, solar generation predictions, and load patterns to make optimal charging/discharging decisions. This self-service capability improves energy efficiency without requiring complex external control systems or manual operation.
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
Improves power efficiency and reduces environmental impact by directly providing DC power from solar generation to loads, optimizing energy storage and usage, and enhancing the stability and efficiency of solar power systems.
Implementation Method 1
solar power generation system
Implementation Method 2
battery is often installed and operated in conjunction with a solar power generation system in order to store a surplus power
Data Source
AI summary
A charging/discharging control system of an energy storage apparatus includes a weather information collection module, a load information collection module, a load grouping module which classifies a plurality of loads into at least one load group based on a load correlation according to a predetermined condition, and an energy storage apparatus charging/discharging control module which determines a battery charging or discharging level per time slot of each of a plurality of energy storage apparatuses by using at least one of an estimated load amount of each load per time slot, a battery charging amount of the energy storage apparatus per time slot via solar generation, and a battery charging amount per time slot via system power, wherein a particular load corresponding to a lowest rate for a unit load is determined by using battery charging/discharging information and power rate information per time slot.