本文開發一適用於串聯鋰離子電池組之模組化電池容量估測系統，其功能包含監控各單電池電壓、電池組溫度及電池組電流、電池容量百分比與剩餘容量估測以及電池過充/過放保護。本文容量估測方法使用庫倫積分法搭配開路電壓法，在充電/放電模式中使用庫倫積分法累積充放電電量；在休息模式中使用開路電壓法對應開路電壓與容量百分比之關係以估測電池容量，如在休息模式中電池組電流不為零，則利用電池組電流與內阻之乘積修正開路電壓以增加估測精確度。本系統主/僕模組之核心控制器分別使用Microchip公司推出之dsPIC數位信號控制器dsPIC33FJ64GP802及dsPIC33FJ16GS502，為了達到即時顯示及電池資料更新功能，本文亦利用National Instruments公司開發之LabVIEW圖形化系統設計軟體撰寫人性化之人機介面。本文將針對所提出之電池容量估測系統的軟硬體進行詳細說明。
根據實驗結果，本文量測電池之電池電壓精確度可達99.94 %，電流除小電流外精確度可達99.78 %；電池容量百分比估測之絕對誤差小於3 %以內，以剩餘容量估測之使用時間與實際使用時間之誤差小於2分鐘。

In this thesis, a modularized SOC estimation system for series-connected lithium-ion battery pack is proposed. The presented SOC Estimation system provides some features, including cell voltages, pack temperature and pack current monitoring, calculation of battery state of charge (SOC) and remaining capacity and Battery overcharge/over discharge protection. In this thesis, an integrated SOC estimation method which combines coulomb counting method and open circuit voltage (OCV) method is presented. During charging/discharging modes, coulomb counting method is exploited to obtain the charged/discharged capacity by integrating the in-and-out-flowing current over time. On the other hand, OCV method is utilized in the relaxation mode to estimate the SOC according to the OCV and SOC relationship. If the current during relaxation mode is non-zero, an additional I*R drop correction will also be employed to achieve better accuracy. In the proposed system, a master/slave configuration is utilized. The proposed BMS has an on-board CAN bus interface which allows it to communicate with other CAN BMS modules.
In this thesis, the central controller utilized in the master/slave BMS is digital signal controllers (DSCs) dsPIC33FJ64GP802 and dsPIC33F16GS502 from Microchip Corp, respectively. In order to provide the real-time display and data logging of all the battery parameters, a user-friendly graphical user interface (GUI) is also developed using LabView from the National Instrument Corp. Detailed description of the hardware and software of the proposed SOC estimation system will be provided, and experiments will also be carried out to verify the correctness of the proposed SOC estimation system. According to the experimental results, the accuracy of the voltage/current measurement is higher than 99.94 % and 99.77 %, respectively. The maximum error of SOC estimation is lower than 3 % and the maximum error of estimated run-time is fewer than 2 minutes.

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