Modeling discharge and charge characteristics of nickel-metal hydride batteries

被引:53
作者
Gu, WB
Wang, CY [1 ]
Li, SM
Geng, MM
Liaw, BY
机构
[1] Penn State Univ, Dept Mech Engn, University Pk, PA 16802 USA
[2] Penn State Univ, Penn Transportat Inst, University Pk, PA 16802 USA
[3] Univ Hawaii Manoa, Dept Mech Engn, Honolulu, HI 96822 USA
[4] Univ Hawaii Manoa, Hawaii Nat Energy Inst, Honolulu, HI 96822 USA
关键词
nickel-metal hydride battery; oxygen reaction; modeling and computer simulation;
D O I
10.1016/S0013-4686(99)00187-5
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A combined numerical and experimental study of the discharge and charge of nickel-metal hydride (Ni-MH) batteries has been performed. Numerical simulations were based on a previously developed micro-macroscopic coupled model which includes both the proton diffusion in the nickel active material and the hydrogen diffusion in metal-hydride particles. Oxygen generation and recombination, a principal mechanism to ensure safe operation of Ni-MH cells during overcharge, is also accounted for. A sealed Ni-MH cell (AA size, 1 Ah capacity) was prepared and discharge experiments were conducted at various rates. These experimental data along with other discharge and charge data available in the literature were used to validate the present model. Numerical results were presented to show the effects of oxygen evolution on battery performance, particularly on the charge acceptance, cell pressure build-up and self-discharge. This combined experimental and numerical study yields a computer-aided tool for the design and optimization of Ni-MH batteries. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:4525 / 4541
页数:17
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