二次充電鋰電池系統可靠度之研究

Study Of System Reliability of Lithium-Ion Rechargeable Battery

王聖先(Sheng-Hsien Wang)

指導教授 ： 張國華

中原大學/工學院/工業工程研究所/碩士(2013年)

https://doi.org/10.6840/CYCU.2013.00062

摘要

中文摘要
產品品質分成兩個部分，一為產品製造完成時，可以達到設計者所設計之各項功能與效果，此時之品質於時間無關,稱為出廠品質,主要於產品之功能性有關；一為產品品質隨時間之延展產品可能產生各項功能之失效可能的機率，稱之為產品可靠度。
電池組對於產品規格書中壽命保證，常以循環次數為依據，而非以讓消費者熟悉的時間為依據，本研究將以二次充電電池組為系統，探討系統可靠度，收集組成系統之各項零件相關研究與供應商所提供加速壽命資料，利用可靠度相關理論，計算出系統可靠度平均壽命時間。但案例製造商對客戶承諾保證平均壽命若干時間，且不良品小於一定之比例，故系統可靠度不僅僅需要計算出平均壽命時間是否滿足，還必須加上於特定時間之前累積失效率。
分析系統硬體組成，定義失效之條件，製作可靠度系統任務圖之後，使用電子業計算可靠度壽命常採用之指數分配，利用統計軟體，模擬產生一萬筆組成系統零件之數據，計算平均壽命時間與累積失效率，是否可以完全達成對客戶承諾。若結果顯示無法達成時，持續提高某些組成零件平均壽命時間，探討系統中改善何種零件時，產生最大效益，繼續模擬，使系統可靠度與累積失效率符合要求，達到客戶保證與製造商之期望目標，並保有最好的利潤。

關鍵字

系統可靠度 ； 二次充電電池

並列摘要

Abstract
There are two aspects on the quality of a product: one is the outgoing quality that is measured by the satisfaction (on specifications or customer needs) on this product by our customers ; the other one is the reliability which is measured by the usage of the product in time.
The warranty for battery packs is usually defined by lifecycle instead of usage time that consumers are familiar with. This study investigated system reliability of rechargeable battery packs. Literature on components of the system and life extending data provided by suppliers were collected, and reliability theories were used to calculate MTBF of the system. As the case manufacturer guarantees not only a MTBF of their system but also a certain defect rate, the cumulative failure rate over a specific time should be considered in addition to MTBF in calculation of system reliability.
With the system hardware composition analyzed, failure conditions defined, and a reliability block diagram (RBD) created, this study further used exponential distribution and statistic software commonly used for calculating MTBF in the electronics industry to simulate component data for 10,000 systems. Whether the obtained MTBF and the cumulative failure rate could satisfy the promises made to customers was examined. If the results failed to meet the requirements, this study would increase the MTBF of certain components in subsequent simulations to find out which component should be improved so as to reach the maximum cost-effectiveness level. Through simulation, this study attempted to obtain an optimal system configuration that can yield the maximum profits while satisfying supplier promises and customer expectations of MTBF and cumulative failure rate.

並列關鍵字

Rechargeable batteries ； System Reliability

參考文獻

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