Statistical Process Control Limits for High Volume Imported Prismatic Cell Verification
Statistical process control limits for imported prismatic cells require Cpk above 1.33 and AQL 0.065 to prevent batch failures during pack assembly.
Factory Grading Dispute
Meaning
Classification conflicts arise when the measured performance of a cell lot does not align with the grade assigned by the manufacturer. A factory grading dispute usually involves a disagreement over whether a batch meets Grade A standards for capacity, internal resistance, voltage and cosmetic condition. Buyers often conduct independent testing to verify that the energy density and cycle life match the technical data sheet provided at the time of purchase.
These discrepancies can lead to large financial adjustments or the rejection of entire containers.
Performance Discrepancy
Testing under different environmental conditions frequently produces varying results for discharge capacity. When a factory grading dispute occurs, the primary point of contention is often the ambient temperature or C rate used during the validation test. Professional labs must follow the exact procedures outlined in the supply agreement to produce defensible data.
Arbitration Process
Resolution of the conflict requires a systematic comparison of the factory exit reports and the incoming inspection data. If the parties cannot agree, a third party laboratory is often engaged to perform a neutral assessment of the contested cells. This independent report typically serves as the final word on the physical and electrical status of the hardware.
Contractual Resolution
Supply agreements contain specific clauses that dictate how a factory grading dispute should be handled. Possible outcomes include a price reduction to reflect the lower grade, a replacement of the defective units, or a full refund for the non conforming portion of the order. Clear definitions of grading criteria at the start of the relationship help prevent these issues from escalating into legal battles.
Strong documentation of the testing environment and the calibration status of the equipment used is essential for any party involved in such a disagreement.