Solar Power Control Device with Battery for Differential Charging
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Solution Overview
Problem
Current solar power generation systems lack a battery configuration that effectively controls charging and maintains maximum power generation, as existing technologies do not address the need for battery charging amount control when a battery is placed at the front stage of a power conditioner.
Innovation Solution
A power control device that includes a storage battery connected between a solar cell and a power conditioner, a converter to charge the battery with differential power, and a control unit that manages charging to maintain the maximum power point and prevent power loss, allowing uncollected power to be stored and ensuring the battery is charged without deviating from the maximum power point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a power conditioner performs MPPT control based on self-predetermined power, then the power conditioner can operate within its rated capacity, but uncollected power occurs when solar cell output exceeds the power conditioner's processing capability
Solution Approach 1:
A storage battery is introduced as an intermediary component between the solar cell and power conditioner. The battery absorbs excess power when solar output exceeds power conditioner capacity, and supplies power when solar output is insufficient, preventing energy loss while maintaining power conditioner operation within its rated capacity
Solution Approach 2:
The system dynamically adjusts the charging/discharging voltage of the storage battery based on the differential between solar cell output and power conditioner output. By changing the voltage parameter according to real-time power balance conditions, the system optimizes power transfer efficiency and prevents energy loss
2Productivity
If a storage battery is provided at the front stage of a power conditioner, then power generation amount can be maintained during output suppression, but there is no mechanism to control the charging amount of the battery
Solution Approach 1:
The control unit continuously monitors the output power of the power conditioner and the output power of the solar cell, and adjusts the battery charging/discharging voltage accordingly. This feedback mechanism ensures the battery is charged with the exact differential power needed, maintaining power generation while preventing overcharging
Solution Approach 2:
The system uses the power differential that would otherwise be lost (uncollected power) to charge the storage battery. The battery serves itself by absorbing its own charging energy from the system's excess power, eliminating the need for external charging infrastructure
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 solution enables the collection of inherently generated power, increasing the overall power generation in solar power systems by efficiently managing power between the solar cell and power conditioner, preventing power loss and maintaining system stability.
Implementation Method 1
a converter that is disposed between the storage battery and the solar cell and charges the storage battery with output power of the solar cell
Implementation Method 2
Solar power generation systems that generate electricity from solar light are known. Solar power generation systems include solar cells
Data Source
AI summary
Provided are a power control device and control method employed therein. The power control device is provided with: a storage battery connected between the solar cell and the power conditioner; a converter, which is disposed between the storage battery and the solar cell, and which charges the storage battery with output power of the solar cell; and a control unit which controls the converter such that the converter charges the storage battery with differential power between the output power of the solar cell and the output power of the power conditioner in the cases where it is determined that the output of the solar cell will be larger than the outputtable power of the power conditioner.