Solar Cell Pack Balancer with Illumination-Adaptive Control
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Solution Overview
Problem
Conventional solar cell balancers are unnecessary when illumination is even, leading to power loss when they are active, and there is a need to balance output currents across solar cell modules to enhance power generation, especially under uneven illumination conditions.
Innovation Solution
A solar cell pack with a balancer, sampler, and control unit that samples voltages and currents between modules, switching the balancer to a stand-by state during even illumination to minimize power loss and activating it during uneven illumination to balance currents and maintain maximum output power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the balancer is continuously activated to balance currents among solar cell modules, then the power-generating ability is improved under uneven illumination, but the power loss of the balancer reduces the overall power-generating ability when illumination is even
Solution Approach 1:
The balancer's operating state is dynamically adjusted based on real-time detection of illumination conditions. The control unit switches the balancer between active and standby states according to whether illumination is uneven or even, making the system adaptive rather than static. This resolves the contradiction by activating the balancer only when productivity improvement is needed, eliminating unnecessary energy loss during even illumination conditions.
Solution Approach 2:
The system employs a feedback mechanism where the sampler continuously monitors voltage and current outputs from solar cell modules, and the control unit processes this information to determine illumination conditions. Based on this feedback, the control unit adjusts the balancer's state accordingly. This closed-loop feedback system enables the balancer to operate only when current imbalance exceeds a threshold, optimizing the balance between productivity improvement and energy loss minimization.
2Stability of the object's composition
If the balancer is activated to balance output currents, then current uniformity among modules is improved, but system complexity increases due to additional control components
Solution Approach 1:
The sampler serves multiple functions: it detects voltage outputs from solar cell modules, samples current values, and provides data for control decisions. The control unit performs multiple tasks including comparing current values, determining illumination conditions, and controlling the balancer's operating state. By designing components with multi-functionality, the patent achieves current uniformity improvement without proportionally increasing system complexity.
Data Source
AI summary
The present disclosure provides a solar cell pack and a method for balancing currents of solar cell modules. The solar cell pack includes a first solar cell module, a second solar cell module, a first balancer, a sampler and a controller. A negative pole of the first solar cell module is electrically connected to a positive pole of the second solar cell module. The first balancer is electrically connected to the first and the second solar cell modules in order to balance the current flowing through the both solar cell modules. An input terminal of the sampler is electrically connected to the first and the second solar cell modules. An output terminal of the sampler is electrically connected to an input terminal of the control unit. An output terminal of the control unit is electrically connected to an input terminal of the first balancer.