Solar Power Storage Module Battery Control Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional solar power supply systems with lithium-ion batteries face instability due to variations in sunlight intensity and temperature, leading to potential overcharge or overdischarge, which can result in a shortened service life and safety risks such as rupture or fire.
Innovation Solution
A solar power storage module comprising a solar cell unit, a lithium-ion battery unit, and a battery control unit that connects solar cells in series or parallel, with an overcharge protection circuit and discharge protection circuit to regulate voltage and prevent overcharging or overdischarging, ensuring safe and efficient charging and discharging of lithium-ion batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If lithium-ion batteries are connected in series to increase voltage output, then power generation capability is improved, but variations in capacitance, initial voltage, and temperature among batteries cause overcharge or overdischarge, leading to shortened service life and safety risks
Solution Approach 1:
An battery control unit is provided which controls the lithium-ion battery unit being charged or discharged. The battery control unit determines a charging current or discharging current of the lithium-ion battery unit according to a state of the lithium-ion battery unit, and controls the lithium-ion battery unit being charged or discharged.
Solution Approach 2:
The battery control unit determines a charging current or discharging current of the lithium-ion battery unit according to a state of the lithium-ion battery unit
2Device complexity
If conventional solar power supply systems are used without battery control, then system simplicity is maintained, but power generated is unstable due to variations in sunlight intensity and ambient temperature
Solution Approach 1:
The battery control unit determines a charging current or discharging current of the lithium-ion battery unit according to a state of the lithium-ion battery unit, and controls the lithium-ion battery unit being charged or discharged
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 provides a stable power supply system with extended service life and enhanced safety performance by preventing overcharge or overdischarge, maintaining output voltage, and ensuring continuous power delivery while protecting the lithium-ion batteries.
Implementation Method 1
A conventional solar power supply system having a solar cell unit that converts solar light energy into electricity
Data Source
AI summary
A solar power supply system includes a power supply bus and a plurality of solar power storage systems. The power storage systems is electrically connected to each other in parallel via the power supply bus. Each of the solar power storage systems includes solar power storage modules and an inverter electrically connected to an external load and the solar power storage modules in series. Each of the solar power storage modules includes a lithium-ion battery unit, a solar cell unit, and a battery control unit. The solar cell unit charges the lithium-ion battery unit. The battery control unit is electrically connected to the lithium-ion battery unit and the solar cell unit, and controls the lithium-ion battery unit being charged or discharged.