PV Junction Box with Elastic Pressing Mechanism
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Solution Overview
Problem
Current photovoltaic junction boxes have a complicated structure, high cost, and unreliable electrical connections between bus bars and conduction terminals, which are prone to becoming loose.
Innovation Solution
A photovoltaic connection box with a simple structure featuring a pressing elastic sheet and conduction terminals with positioning slots and stub-shaped protrusions, where the elastic sheet presses the bus bar onto the terminal, ensuring reliable electrical contact, and soldering material is used to secure the bus bar, preventing movement and enhancing connection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional photovoltaic junction box structure is used with multiple components (box body, conduction terminals, diode, elastic clip), then the electrical connection function is achieved, but the structure becomes complicated and cost increases
Solution Approach 1:
The patent combines the box body, conduction terminals, and elastic clip into an integrated junction box structure. The conduction terminals are directly mounted on the box body with integrated positioning slots and pressing mechanisms, eliminating the need for separate components and reducing overall structural complexity while maintaining electrical connection reliability
Solution Approach 2:
The junction box structure serves multiple functions simultaneously: the box body provides mechanical support and protection, the conduction terminals establish electrical connections, and the integrated elastic pressing mechanism ensures reliable contact. This multi-functional design reduces the number of separate components needed
2Ease of operation
If traditional elastic clips are used to clamp bus bars, then connection is achieved, but the electrical contact becomes unreliable and prone to loosening
Solution Approach 1:
The patent employs an elastic pressing mechanism that dynamically adapts to the bus bar dimensions and maintains constant contact pressure. The elastic deformation of the pressing components ensures continuous reliable electrical contact while accommodating variations in bus bar positioning
Solution Approach 2:
The positioning slots are pre-formed with precise dimensions and orientations to guide and secure the bus bars before final pressing. This preliminary positioning action ensures proper alignment and prevents loosening during operation, establishing reliable electrical contact from the outset
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 reliable and stable electrical connection between the bus bar and conduction terminal, reducing contact resistance and improving soldering quality, thus addressing the issues of complexity, cost, and reliability in existing designs.
Implementation Method 1
a pressing elastic sheet mounted on the conduction terminal and adapted to press the bus bar on the conduction terminal
Data Source
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AI summary
The present disclosure discloses a photovoltaic connection box, including: a box body; and conduction terminals received in the box body. Each of the conduction terminals is provided with a bus bar holding mechanism configured to hold a bus bar of a solar panel on the conduction terminal so as to electrically connect the bus bar to the conduction terminal. Each of the bus bar holding mechanisms comprises a positioning slot formed on the conduction terminal and adapted to position the bus bar inserted therein in place; and a pressing elastic sheet mounted on the conduction terminal and adapted to press the bus bar on the conduction terminal, so that the bus bar reliably comes into electrical contact with the conduction terminal. Further, the present disclosure also discloses a photovoltaic connection module comprising the photovoltaic connection box.