車用鋰電池電壓監控系統

本篇論文針對電動車內搭載的電池電源模組所使用之鋰電池進行監控研究。在電池陣列中每顆鋰電池上加入一個電池電壓監控IC (BMIC)，利用BMIC將鋰電池目前的電壓轉換成數位訊號，傳至後方的微處理器進行進一步的處理。考慮到車用的溫度及電池為IC唯一的電源來源，必須利用前端電路 (Frond End Circuit)來降低溫度對電路產生的影響及提供電源給各部分的子電路。同時BMIC對於鋰電池而言是額外的消耗，必須盡可能降低其所需使用的功耗，設計上不僅大幅度的降低後方電路供應電壓，此外我們還對SAR ADC的架構進行改良，使用電容式分壓電路來進行訊號取樣及採用單一參考電壓來進行切換，最後完成再10KHz取樣速度下僅消耗51.3μW的監測電路(不含前端電路) ，使用TSMC 0.25μm HV 1P5M CMOS製成來實現與驗證此系統。

關鍵字

連續近似式類比數位轉換器；分壓電路；電池模組；低壓差線性轉換器；能隙帶差參考電路

並列摘要

This thesis focuses on the monitoring system of the high voltage lithium battery modules of electric vehicles. We will equip every single lithium battery with a battery management IC (BMIC). Using the BMIC to convert battery voltage into digital codes, and then transmit the digital codes to microprocessor for further analyzing. A Frond End circuit is implemented to suppress the temperature effect and offer the power supply to other circuits. In addition, BMIC is extra power consumption for lithium battery, so it has to decrease the power dissipation. It is not only reducing the supply voltage but also modifying the architecture of SAR ADC. Using the voltage divider implemented by capacitor to sample the signal and single reference voltage to complete the conversion. Finally, the proposed architecture has a power of 51.3μW(Frond End circuit is excluded) and at 10kHz sampling rate. The chip is realized in TSMC 1P5M 0.25μm HV mixed signal CMOS process.

並列關鍵字

SAR ADC ； Voltage Divider ； Battery Module ； LDO ； Bandgap reference circuit

參考文獻

[2] House Of Battery (n.d.). Custom Lithium Ion Battery Packs (Li-Ion Batteries). Retrieved May 26, 2014, from

[5] H. M. Chen, Y. G. Hao, L. Zhao, and Y. H. Cheng, ”An area-efficient 55 nm 10-bit 1-MS/s SAR ADC for battery voltage measurement,” Journal of Semiconductors, 34(9), 095013.

[6] 郭洲銘, 應用於脈波振幅調變系統之高速低功率數位化類比數位轉換器與數位類比轉換器, 碩士, 電控工程研究所, 國立交通大學, 新竹市, 2010.

[8] B. Razavi, Design of Analog CMOS Integrated Circuits, McGRAW-HILL International Edition, 2001.

[9] P. Mok and K. N. Leung, "Design considerations of recent advanced low-voltage low-temperature-coefficient CMOS bandgap voltage reference," IEEE Custom Integrated Circuits Conference , pp.635,642, 3-6 Oct. 2004

國際替代計量

車用鋰電池電壓監控系統

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