Technical guide
OCV vs Internal Resistance Testing for Battery Cells
OCV and internal resistance answer different screening questions. They are often used together before PACK assembly, with limits defined by the cell and project quality plan.
Key planning points
What OCV indicates
OCV is the cell voltage measured without an external load. It can support state and consistency screening when conditions are controlled.
What IR indicates
Internal resistance estimates opposition to current flow and can help identify variation that affects voltage drop and heat.
Why conditions matter
Temperature, rest time, contact quality and measurement method influence results; comparable screening needs a controlled procedure.
How to select equipment
Confirm range, accuracy, channels, fixtures, loading, barcode and data-export requirements.
Use this guide in a real project
Share the available drawings, specifications, target output or site conditions. CowinLink Energy will use the confirmed inputs to coordinate a suitable equipment or charging proposal.