Title :
Li-ion battery management chip for multi-cell battery pack
Author :
Ye, Yidie ; Chen, Chen ; Jin, Jin ; HE, Lenian
Author_Institution :
Inst. of VLSI design, Zhejiang Univ., Hangzhou
fDate :
Nov. 30 2008-Dec. 3 2008
Abstract :
This paper introduces a method of realizing a monolithic battery management chip for a lithium ion battery pack of multi-cell in series. High precision subtractor amplifiers were employed to extract the voltage information of each battery. With the utilization of the subtractor amplifiers, the whole system was allowed to be implemented in a normal, nonexpensive standard CMOS process with 5 V supply voltage, instead of a costly high-voltage process. A testing chip was implemented by using CSMCpsilas 0.5 mum 5 V N-well CMOS process. The chip was designed for double-cell battery pack and compatible with single-cell application. The testing results showed this chip functioned well in both applications of double-cell and single-cell, and revealed that the present design method would be suitable for the multi-cell battery packs.
Keywords :
CMOS analogue integrated circuits; battery management systems; integrated circuit design; secondary cells; N-well CMOS process; double-cell battery pack; high-precision subtractor amplifiers; lithium ion battery pack; monolithic battery management chip design; multicell battery packs; size 0.5 mum; voltage 5 V; Battery management systems; CMOS process; Circuit testing; Data mining; Electronic equipment testing; Lithium; Protection; Resistors; Temperature sensors; Voltage;
Conference_Titel :
Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on
Conference_Location :
Macao
Print_ISBN :
978-1-4244-2341-5
Electronic_ISBN :
978-1-4244-2342-2
DOI :
10.1109/APCCAS.2008.4746078
