Statistical Process Control Procedures for Zero Acceptance Incoming Cell Screening Protocols
Implement C=0 incoming cell sampling with four-wire Kelvin metrology and temperature-corrected K-value SPC to reject defect lots before pack assembly.
Vendor Quality Agreement
Meaning
Legally binding contracts establish the quality standards, inspection methods, and defect limits that a supplier must meet for delivered products. Procurement departments write a vendor quality agreement for battery cell supply to define who is responsible for testing and what happens when cells fail to meet specifications. This document prevents disputes and establishes clear quality boundaries between the buyer and supplier.
Technical Alignment
Engineering specifications and testing procedures are aligned between the two parties to ensure consistent evaluation. The vendor quality agreement lists the specific tests, like capacity and voltage checks, that must be completed before shipment. This clarity ensures that both sides use the same criteria to judge quality.
Change Management
Suppliers must agree to notify the buyer before making any changes to their materials or manufacturing processes. Unauthorized changes can affect the performance of the cells and the safety of the final battery pack. This control protects the buyer from unexpected product modifications.
Defect Resolution
Protocol actions are defined for when a batch of cells is found to be defective at the receiving dock. The agreement outlines the timelines for investigation and the supplier’s liability for replacement or refund. This clause ensures quick resolution of quality issues.