Solar Cell Module With Perpendicular Front And Rear Buses
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Solution Overview
Problem
Conventional solar cell modules require significant space for connecting solar cell strings in series, leading to increased size and power consumption due to the use of conducting bars and longer wire lengths, which negatively impact efficiency.
Innovation Solution
The solar cell module design features solar cells with front and rear buses oriented in different directions, allowing for direct electrical connections via conducting strips, reducing the need for additional conducting bars and minimizing wire length, thereby saving space and lowering resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conducting bars and long wires are used to connect solar cell strings in series, then electrical connection is achieved, but the module size increases and power consumption increases
Solution Approach 1:
The patent changes the connection dimension from horizontal (using conducting bars around the module) to vertical/direct (using conducting strips between adjacent cells). The rear bus extends in the second direction perpendicular to the first direction, enabling direct vertical connections between solar cell strings without requiring peripheral conducting bars, thus reducing module size while maintaining electrical connectivity.
Solution Approach 2:
The patent merges the functions of separate conducting bars and connecting wires into a single integrated conducting strip structure. The rear bus and conducting strip work together as a unified connection system that directly connects adjacent solar cells, eliminating the need for separate conducting bars and reducing the overall number of connection components.
2Reliability
If conducting bars and long wires are used to connect solar cell strings in series, then electrical connection is achieved, but power consumption increases due to longer wire lengths
Solution Approach 1:
The patent reduces wire length by changing the connection geometry from peripheral horizontal connections to direct vertical connections between adjacent cells. The rear bus extends in the second direction (perpendicular to the first direction) enabling shorter direct paths between connection points, thereby reducing resistance and power consumption.
Solution Approach 2:
The patent extracts and eliminates the unnecessary conducting bars from the system, keeping only the essential conducting strips for electrical connection. This removal of redundant components reduces the total wire length and associated power consumption while maintaining the required electrical connectivity.
3Reliability
If conventional solar cell arrangement is used, then current collection is achieved, but extra space is required around solar cell strings
Solution Approach 1:
The patent utilizes the second direction (perpendicular to the first direction) for the rear bus extension, enabling current collection and electrical connection without requiring peripheral space. This dimensional change allows the connection system to be integrated within the module boundaries rather than requiring external space around the solar cell strings.
Solution Approach 2:
The patent combines the current collection function and electrical connection function into a single integrated rear bus and conducting strip system. This merging eliminates the need for separate conducting bars and reduces the space required around solar cell strings while maintaining effective current collection and series connection.
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
This design reduces the size of the solar cell module, decreases power consumption, and enhances efficiency by minimizing extra space requirements and shortening the overall length of conducting wires.
Implementation Method 1
The silicon substrate 110 generates current when the front surface 112 receives light
Data Source
AI summary
The present invention provides a solar cell including a substrate, a first front bus, and a first rear bus. The substrate has a front surface and a rear surface. The first front bus is located on the front surface of the substrate along a first direction for collecting current generated by the substrate, and for providing a first front contact electrode. The first rear bus is located on the rear surface of the substrate along a second direction different from the first direction for collecting current generated by the substrate, and for providing a first rear contact electrode.