Engineering FAQ Guide
Composite Busbar Ribbon: Current Path and Joining FAQ
What is Copper-Aluminum Composite Busbar Ribbon?
copper-aluminum composite ribbon with solderable busbar surface.
Composite busbar ribbon carries current between strings or to the junction-box connection. Specify the path length, current, available width and thickness, coating and joint design. Compare the completed connection for resistance and temperature rise.
Primary Applications
- PV module busbar
- junction box connection
- string current collection
Critical RFQ Specifications
- interconnect function and cell layout
- diameter or width and thickness
- coating alloy and thickness
- mechanical requirements
- spool and feeding conditions
Selection
Does the cell technology determine the solder coating?
Cell metallization, contact layout and the approved joining process determine the coating requirement together. State coating alloy and thickness separately from equipment temperature, dwell time, pressure and cooling. MBB and SMBB describe interconnect layouts, rather than a coating alloy.
How should a composite ribbon be compared with copper?
Use the same module current path and a defined copper baseline. State whether dimensions or resistance are held constant; compare coating, joint resistance, handling, copper use and accepted module output under the same test conditions.
Specifications
How do I specify round and flat interconnect dimensions?
For round wire, state metal diameter and finished coated diameter with tolerances. For flat ribbon, state width, thickness, corners and coating build. Add straightness or camber, spool dimensions, winding pattern and feeding tension.
Procurement
What should a Copper-Aluminum Composite Busbar Ribbon inquiry include?
Include width, thickness, coating, current path, peel strength, spool or cut format, drawing revision, intended use, requested sample or production quantity, packaging and destination. Confirm the required inspection records and schedule for that specification.
Testing
What should a ribbon trial measure?
Record the cell and ribbon lots, geometry, coating and stringer settings. Check feeding, wetting, peel behavior, cell damage by EL inspection and resistance. Agree any module reliability tests for the changed bill of materials, with methods and acceptance limits.