Fail-proof Solar Connector with Active Plug Configuration
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Solution Overview
Problem
Conventional solar photovoltaic (PV) junction boxes have high failure rates due to wiring and installation issues, leading to safety and warranty problems, particularly exacerbated by inexperienced or cost-driven installations, resulting in complex and unreliable connections.
Innovation Solution
A fail-proof electrical connector apparatus with a compact structure and innovative cabling mechanism that simplifies the connection of solar modules, featuring exposed tabs with insertion pins, a cable assembly with a unique plug configuration to prevent electrical shorts, and integrated bypass diodes with an optional LED alert for malfunction detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional junction boxes with large profiles and additional cables are used, then the electrical connection function is achieved, but the wiring complexity and potential wiring issues increase
Solution Approach 1:
The patent combines the junction box enclosure, bypass diodes, and electrical connection terminals into a single integrated unit mounted directly on the solar module. This merging eliminates the need for separate cable bundles and external wiring components, thereby reducing wiring complexity while maintaining reliable electrical connections and improving overall system reliability.
Solution Approach 2:
The junction box enclosure serves multiple functions simultaneously: it houses the bypass diodes for electrical protection, provides mounting structure for output terminals, and acts as a protective enclosure for internal components. This multi-functionality reduces the need for additional separate components and simplifies the overall wiring system.
2Reliability
If conventional junction boxes with additional cables and grouped cables under modules are used, then the electrical connection function is achieved, but installation difficulty and maintenance difficulty increase
Solution Approach 1:
By integrating the bypass diodes and terminals into a single mounted unit on the module, the patent eliminates complex cable routing and grouping operations. Installers simply need to connect cables to the integrated terminals, significantly simplifying the installation process while ensuring reliable electrical connections through the integrated design.
Solution Approach 2:
The bypass diodes and terminal structure are pre-integrated into the junction box enclosure during manufacturing, with all internal electrical connections already established. This preliminary preparation eliminates the need for complex field assembly and cable management during installation, making the installation process easier and more reliable.
3Reliability
If conventional junction boxes with grouped cable bundles under modules are used, then the electrical connection function is achieved, but troubleshooting and repair difficulty increase
Solution Approach 1:
The integration of bypass diodes and terminals into a single accessible enclosure allows technicians to easily access and test all electrical components through one location rather than searching through distributed cable bundles under the module. This significantly improves troubleshooting efficiency and ease of repair while maintaining system reliability.
Solution Approach 2:
The integrated junction box enclosure acts as a centralized intermediary point that consolidates all electrical connections and protective components. This intermediary structure provides a single access point for maintenance personnel to diagnose and repair electrical issues, eliminating the need to trace and access multiple distributed connection points under the module.
4Reliability
If conventional junction boxes with complex edge installations are used, then the electrical connection function is achieved, but the device profile and installation complexity increase
Solution Approach 1:
The patent merges the junction box, bypass diodes, and terminals into a single compact unit that can be mounted directly on the module surface. This integration eliminates the need for complex edge-mounted configurations and multiple separate components, reducing installation complexity while ensuring reliable electrical connections through the unified design.
Data Source
AI summary
A fail proof electrical connector apparatus offers a unique structure for solar photovoltaic (PV) system installations. The apparatus includes a compact connector enclosure that can be installed at flexible locations of a solar module. The tabs of the connector enclosure connect to various solar cells of the module. The insertion pins of the tabs are mounted inside plugs of a pin connector, which connects to a cable. The cable comprises a one-plug end and a multiple-plug end with a wire connecting both. Of the two or more plugs of the multiple-plug end, only one active plug is electrically connected to the wire. The cable is connected to the module with the active plug being inserted to a center plug of the pin connector, and the one-plug end connected to an outer plug of the pin connector of an adjacent module, thus, achieving fail proof, reliable installations while saving labor hours.