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監(jiān)護(hù)儀智能電池管理系統(tǒng)

An intelligent management system for monitor

作者: 於亞軍  高超  楊戀  俞政濤  何愛軍  曾慶國 
單位:                      南京大學(xué)電子科學(xué)與工程學(xué)院(南京210093)        
關(guān)鍵詞:                     雙電池;平衡充;BQ24703;PIC16F877A          
分類號:
出版年·卷·期(頁碼):2013·32·1(83-86)
摘要:

目的 隨著便攜式監(jiān)護(hù)儀的日益普及,電池管理已成為評估監(jiān)護(hù)儀性能的重要指標(biāo)之一。考慮到監(jiān)護(hù)儀的特殊性和安全性,設(shè)計一套監(jiān)護(hù)儀雙電池平衡充熱備份智能管理方案。方法 采用BQ24703對鋰電池進(jìn)行充電控制,雙電池?zé)醾浞輨t確保了主電池突然掉電時能夠及時切換副電池進(jìn)行供電。利用PIC16F877A管理電池,通過SMBUS協(xié)議與BQ2085通信準(zhǔn)確獲取電池容量,同時利用BQ29311對鋰電池組進(jìn)行平衡充電,保證每節(jié)電池的容量得到充分的利用。在充電保護(hù)電路端,采用S-8244和索尼鋰電池專用熔絲SFH-1412A對其進(jìn)行二次保護(hù),提高了電池的安全性和可靠性。結(jié)果 本方案完全可以給監(jiān)護(hù)儀提供穩(wěn)定安全的供電。結(jié)論 本方案不僅增強(qiáng)了監(jiān)護(hù)儀的持續(xù)工作能力,也滿足了臨床使用要求。

Objective With the increasing popularity of portable monitor,power management had become one of the most important indicators to assess the performance of the monitor.Considering the specialty and security of the monitor,we designed an intelligent management solution for monitor by using dual-battery balanced charge and hot backup.Methods In this solution,BQ24703 was used to control the charge of lithium batteries,dual-battery and hot backup were used to ensure that vice-battery could supply power timely in case the main battery being out accidently.Using PIC16F877A for battery management,we obtained battery capacity more accurately through the communication between PIC16F877A and BQ2085 by SMBUS.Meanwhile,using BQ29311 to charge the lithium batteries,we ensured that each battery could be fully used.In the circuit for charging protection,we utilized S-8224 and SFH-1412A(the fuse dedicated for Sony lithium battery)for twice protection to enhance the security and reliability of battery.Results This program provided a stable and secure power supply to the monitor.Conclusions This system not only enhanced the monitor′s continued working ability,but also met the clinical requirements.

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