2KENNETH B,MIKAEL K,GORAN L,et al.An electrochemical impedance spectroscope method for prediction of the state of charge of nickel-metal hydridebattery at open circuit and during discharge[J].Journal of Power Sources,1998,72:118-125.
3CHENG S A,ZHANG J Q,ZHAO MH,et al.Electrochemical impedance spectroscope study of Ni/MH batteries[J].Journal of Alloys and Compounds,1999,293-295:814-820.
4HUET F.A review of impedance measurements for determination of the state-of-charge or state-of-health of secondary batteries[J].Journal of Power Sources,1998,70:59-69.
5RODRIGUES S,MUNICHANDRAIAH N,SHUKLA A K.A review of state-of-charge indication of batteries by means of a.c.impedance measurements[J].Journal of Power Sources,2000,87:12-20.