镉镍蓄电池组一致性筛选及快速充电机保护方法

Conformity classification of Ni-Cd battery and the protection method to quick charger

对镉镍蓄电池组进行快速充电 ,如果电池一致性不高 ,则会对电池造成较大损伤 ,严重影响其寿命。出厂时如果对单体电池一致性进行筛选 ,并综合利用各种常用的充电保护方法 ,电池出现的问题就能得到较好的解决。通常的单体电池一致性筛选有容量筛选法、内阻 容量筛选法、容量 负增量 (-ΔU )筛选法、特性曲线筛选法等。在进行快速充电时 ,若不及时停止充电 ,会对电池的寿命造成很大影响 ,有时会造成电池爆炸事故。能否有效地对电池进行保护 ,也成为充电机性能的关键。常用的充电终点控制方法有定时控制法、电压控制法、温度控制法、综合控制法等。提出了解决充电机适应性的模型———面向对象的智能充电机的概念。

The Ni Cd battery pack will be damaged (even exploded) and its life will be decreased during quick charge if the conformity of Ni Cd single cells is low or the charge process can not be terminated in time. Therefore, the conformity classification and protection method to charger is the important factors for quick charge. The common used conformity classification methods to Ni Cd single cells include the capacity classification, the internal resistance capacity classification, the capacity -ΔU classification and the characteristic curve classification. The common used charge termination control methods include timing control, voltage control, temperature control and integrated control. A new model of adaptability solution for charger, the object oriented charger, is also introduced.