The gplb exhibits good discharge performance with discharge curve declining slowly , and the average discharge voltage is 3 . 7v . it also has good rate charge and discharge performance , whose discharge capacity at 2 . 0c is over 90 % of that at 0 . 2c . the cycle performance at 0 . 5c discharge rate is very good but bad at high discharge rate ( 1 . 0c ) 该电池具有良好的放电平台，放电曲线平缓，平均放电电压为3 . 7v ；倍率充放电性能良好， 2 . 0c放电容量为0 . 2c放电容量的90以上；电池的低倍率放电( 0 . 5c )循环性能良好，但高倍率( 1 . 0c )循环性能不太好，电池的低温性能也有待提高。
We think increase of the internal resistance of battery is the main problem to the recycle life deteriorating at high rate , besides the influence of the materials . decomposition occurred on positive and negative electrode at high rate current and the interspaces increased . the restrains of swelling and the increase of an oxygen overvoltage can improve the performance of recycle life 对于电池性能衰减的原因，认为除了所使用的材料是影响电池性能的重要因素之外，在温度和大电流作用下，电池的正负极材料发生裂解，极片内空隙增大，电池内阻性能恶化是引起电池高倍率循环性能恶化的关键;通过抑制正极析氧和膨胀，并降低负极合金材料的粉化过程，将有望缓解电池内阻特性的恶化，从而提高电池高倍率充放电循环性能。
The results shows : under high - rate discharge conditions , the batteries with cnts added in the positive electrodes exhibited much better cycling stability , higher discharge voltage and high - rate capability . the increase in internal resistance of the batteries with cnts was lower than that of the batteries without cnts during charge - discharge cycles . the addition of 0 . 5 wt . % 结果表明：在高倍率放电的条件下，正极中添加少量cnts的ni mh电池具有更好的循环稳定性、更高的放电平台以及更好的高倍率性能；正极中添加少量cnts制成的mh ni电池在高倍率放电的循环过程中内阻升高较小；正极添加0 . 5wt . cnts的电池具有理想的高倍率性能和综合性能，过多的加入cnts无益于电池性能的提高。
Ni - cd cylindrical cell has the properties of small internal resistance , long service life , resistant to over charge and discharge , low self discharge , wide operation temperature range ( - 20 + 40 ) and high reliability . they are suitable for high rate discharge and widely used in the fields of electrical tools , railway trains , lighting , fire prevention and military 镉镍圆柱密封碱性蓄电池具有内阻小，使用寿命长，耐过充过放电，自放电小，使用温度范围宽（ - 20 + 40 ） 、可靠性高等特点，适用高倍率（大功率）放电使用，广泛应用于电动工具、列尾电源、照明、消防、仪器仪表以及军事领域。
