Metal hydride-nickel cell is one of the best choices for hybrid electric vehicle for its high specific energy density,security,reliability and renewability.However,its poor capability under high temperature and low sp...Metal hydride-nickel cell is one of the best choices for hybrid electric vehicle for its high specific energy density,security,reliability and renewability.However,its poor capability under high temperature and low specific power restrict its applications.Our studies on the metal hydride-nickel cell with different loading densities show that Ni（OH） 2 with CoOOH has good oxidation and reduction properties and proton spread rate when the loading density is 0.617 kg/m2.The power density and energy density can be as high as 1 250 W/kg and 49.4 W·h/kg respectively when Ni（OH） 2 with CoOOH was used in high power battery with the nickel foam.展开更多
Charge and discharge characteristics of Ni/MH batteries are investigated with experiments. During battery’s working, the voltage, capacity, temperature and internal resistance were recorded, corresponding curves were...Charge and discharge characteristics of Ni/MH batteries are investigated with experiments. During battery’s working, the voltage, capacity, temperature and internal resistance were recorded, corresponding curves were depicted. Variations of the aforementioned four parameters are differently obvious. Ending criteria of charge and discharge of Ni/MH batteries are discussed on the basis of the curves. Voltage, capacity and temperature of a battery can be used as ending criteria during charge. When discharge takes place, voltage, capacity and internal resistance can be chosen as ending criteria. As a whole, capacity is more suitable for being used as ending criteria of charge and discharge than the other three parameters. At last, the capacity of a battery is recommended to be ending criteria of charge and discharge. The conclusions will provide references to different capacity Ni/MH batteries for electric vehicles.展开更多
基金Sponsored by the National High Technology Research and Development Program of China(2007AA11A104)
文摘Metal hydride-nickel cell is one of the best choices for hybrid electric vehicle for its high specific energy density,security,reliability and renewability.However,its poor capability under high temperature and low specific power restrict its applications.Our studies on the metal hydride-nickel cell with different loading densities show that Ni（OH） 2 with CoOOH has good oxidation and reduction properties and proton spread rate when the loading density is 0.617 kg/m2.The power density and energy density can be as high as 1 250 W/kg and 49.4 W·h/kg respectively when Ni（OH） 2 with CoOOH was used in high power battery with the nickel foam.
文摘Charge and discharge characteristics of Ni/MH batteries are investigated with experiments. During battery’s working, the voltage, capacity, temperature and internal resistance were recorded, corresponding curves were depicted. Variations of the aforementioned four parameters are differently obvious. Ending criteria of charge and discharge of Ni/MH batteries are discussed on the basis of the curves. Voltage, capacity and temperature of a battery can be used as ending criteria during charge. When discharge takes place, voltage, capacity and internal resistance can be chosen as ending criteria. As a whole, capacity is more suitable for being used as ending criteria of charge and discharge than the other three parameters. At last, the capacity of a battery is recommended to be ending criteria of charge and discharge. The conclusions will provide references to different capacity Ni/MH batteries for electric vehicles.
