การลดจำนวนแบตเตอรี่รถจักรยานยนต์ที่ไม่เป็นไปตามข้อกำหนดด้วยการออกแบบและวิเคราะห์การทดลอง

Abstract

This study aims to reduce the quantity of non-compliant battery in the production process of the A7 motorcycle battery. The production process faces the issue of improper internal resistance of battery, which exceeds the standards. This problem is caused by inappropriate settings in the pressure, stopper distance, and degree of the cell holder. To solve the problem, the 2^k factorial experiment design was employed to determine the optimal production conditions. The results showed that all factors, both main and interaction effects, significantly influenced the internal resistance of the battery. The optimal conditions were found to be pressure of 5 megapascals, stopper distance of 24.25 millimeters, and cell holder angle of 14 degrees. When these optimized conditions were implemented, the average internal resistance of the battery was significantly not more than 1.15 milliohms. The implementation of the findings led to a significant reduction in the cost of defectives, with the monthly loss dropping to 10,784 Baht, a 64.14% reduction compared to the pre-improvement losses.