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高功率型MH-Ni蓄电池技术研究 被引量:1

Studies on high-power nickel-metal hydride battery
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摘要 研究了提高MH-Ni蓄电池高功率特性的几个技术手段和电解液成份对高功率MH-Ni蓄电池充电效率的影响。改进MH-Ni蓄电池正负极集流结构并配以薄长极板使用时,蓄电池内阻变小,大电流充放电性能明显提高;烧结负极比湿法拉浆负极的大电流放电性能更为优越。当采用合适的端面焊结构并配以薄长极板使用时,8AhD型MH-Ni蓄电池的内阻比普通8AhD型蓄电池的内阻降低1倍以上,维持在2.2mΩ左右,单体30A充电效率明显提高,30A放电平台提高100mV左右。随着电解液中Na+和Li+含量的提高,MH-Ni蓄电池的高温充放电效率得到改善,但低温放电性能受到限制。当控制质量比m(KOH)∶m(NaOH)∶m(LiOH·H2O)=36∶43∶6时,13AhF型高功率MH-Ni蓄电池在30℃和40℃下的3A充放电效率分别是:98.00%和95.00%;-18℃下,1C(13A)放电效率为91.00%。 Abstract:In this paper, both some techniques for improvement high power characteristics and effect of the electrolyte components on the charge efficiency of nickel-metal hydride battery have been investigated. If the structure of current collectors are improved and combined with thin and long electrodes, the internal impedance of the cell will decrease, and the characteristic of charge/discharge at a high current will be improved remarkably. Meantime, the discharge characteristic at a high current of sintered negative electrode is superior to that of pasted negative electrode .When combined with thin and long electrodes, and current collected by head face welding, the internal impedance of 8 Ah D type Ni-MH battery is laid down to 2.2 mΩ( half ofthenormal cell ), the charge efficiency at 30 A is improved and the discharge mid-voltage is raised about 100 mV. The charge efficiency at high temperature is improved with the increase of Na^+ and Li^+ contained in the electrolyte. When the mass ratio ofm(KOH) : m(NaOH) : m(LiOH·H2O)=36 : 43 : 6, the charge/discharge efficiency of 13 Ah F type battery with constant current 3 A at 30 ℃,40 ℃ is 98.00% / 95.00%, respectively and the discharge efficiency with constant current 1 C(13 A ) at -18 ℃ is 91.00%.
出处 《电源技术》 CAS CSCD 北大核心 2005年第12期826-830,共5页 Chinese Journal of Power Sources
关键词 高功率MH—Ni蓄电池 烧结负极 湿法拉浆负极 端面焊 内阻 充放电效率 high-power nickel-metal hydride battery sintered negative electrode pasted negative electrode head face welding Internal impedance charge/discharge efficiency
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  • 1郭鹤铜 刘淑兰.理论电化学[M].北京:宇航出版社,1984..
  • 2贺广胜.半烧结KR-SC镉镍蓄电池大电流放电性能研究[A]..中国第二十二届化学与物理电源学术年会论文集[C].,1996.88.
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