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定流充电与定压充电各自的优缺点
定流充电 现在的充电器 都是用这个 当电池用尽的时候! 充电电流是很大的 慢慢的电池饱和 充电电流变小!
定流充电 就是当充电开始 一直以平滑的电流 对电池进行 充电! 我们称为恒流源 电流恒定 不变 不会因为电池容量 突然大起大落! 这就是定流充电 好处在於 对镍镉电池 充电作用 很大!充电效果好 耐用
定压充电 就是当电池 用尽的时候 电池电压 比较低! 充电电压 保持一个数值不变 直接对电池充电 当电池 两端电压 达到标准的时候 及断开 电路
这类充电器 用在氢电池 或者锂电池 比较多!
两种 缺点 就是 保护电路设计较为复杂! 优点是 都很安全!
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恒压充电,就不能控制电流大小,容易对充电器和电池造成损坏,
恒流充电,电池的充电额定电压得不到保障,容易把电池充爆。
定流充电就是恒流充电;定压充电就是恒压充电。
恒流充电:是指电流维持在恒定值的充电。是一种广泛采用的充电方法。蓄电池的初充电,运行中的蓄电池的容量检查,运行中的牵引蓄电池的充电以及蓄电池极板的化成充电,多采用恒流或分阶段恒流充电。
此法的优点是可以根据蓄电池的容量确定充电电流值,直接计算充电量并确定充电完成的时间。
恒压充电:蓄电池两极间的电压维持在恒定值的充电。是一种广泛采用的充电方法。电信装置、不间断电源(UPS)等的蓄电池的浮充电和涓流充电都是恒压充电。起动用蓄电池在车辆运行时也处于近似的恒压充电的情况。
其优点是随着蓄电池的荷电状态的变化,自动调整充电电流,如果规定的电压恒定值适宜,就既能保证蓄电池的完全充电,又能尽量减少析气和失水。
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