PV Module Lead-Out Structure for Cell String Short-Circuit Prevention
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Solution Overview
Problem
The existing photovoltaic module designs face a risk of short circuit between cell strings due to insufficient distance between lead wires connected to diodes.
Innovation Solution
A photovoltaic module with a lead-out structure that includes a main body portion, a first connecting portion, and a second connecting portion, where the second connecting portion is closer to the edge of the main body portion and maintains a distance ranging from 2 mm to 20 mm, thereby preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If lead wires are positioned closer together to reduce space, then device complexity and space usage improve, but the risk of short circuit between cell strings increases
Solution Approach 1:
The lead-out structure extends in multiple spatial dimensions with a main body portion, first connecting portion, and second connecting portion arranged at different orientations. This multi-dimensional arrangement allows lead wires to be positioned closer in plan view while maintaining sufficient separation distance in three-dimensional space, thus reducing space usage without increasing short circuit risk
Solution Approach 2:
The patent applies different structural configurations to different portions of the lead-out structure. The main body portion has specific thickness and width dimensions, while the first and second connecting portions have different geometric arrangements. This local differentiation optimizes space usage in each region while ensuring adequate insulation distance where critical for preventing short circuits
2Reliability
If the distance between lead wires is increased to prevent short circuits, then reliability improves, but device complexity and space consumption increase
Solution Approach 1:
The lead-out structure merges the main body portion with the first and second connecting portions into a single integrated component. This unified structure achieves reliable lead wire separation for short circuit prevention while avoiding the need for multiple separate components, thus maintaining relatively simple device complexity
Solution Approach 2:
The lead-out structure serves multiple functions simultaneously: it provides electrical connection, maintains insulation distance for short circuit prevention, and offers mechanical support. This multi-functionality reduces the need for additional separate components, keeping device complexity low while ensuring reliability
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 proposed design effectively avoids the risk of short circuits between cell strings by ensuring a sufficient distance between the lead-out structure components, enhancing the reliability and stability of the photovoltaic module.
Implementation Method 1
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Data Source
AI summary
The photovoltaic module includes at least one cell unit group, where the cell unit group includes multiple cell strings, and adjacent cell strings are connected by a connection structure. The connection structure includes a lead-out structure, which includes a main body portion, a first connecting portion and a second connecting portion that are arranged on the main body portion; the first connecting portion is connected to the second connecting portion, the first connecting portion is disposed in parallel to a length direction of the main body portion, and the second connecting portion extends out of the first connecting portion. In the length direction of the main body portion, the main body portion has a first edge, the second connecting portion is closer to the first edge relative to the first connecting portion, and a distance between the second connecting portion and the first edge ranges from 2 mm to 20 mm.