Battery charging method and charging device

An embodiment of the present invention provides a battery charging method which is applied to a charging device. The charging device is connected to a battery. The method includes a pre-charging stageof performing pre-charging on the battery by using a first current until the charging voltage of the battery reaches a first voltage threshold, an average charging state of charging the battery witha constant current or voltage, and a floating charging stage of charging the battery with a constant third voltage. The charging voltage and the charging current are controlled by a battery charging curve, the service life of the battery is improved, the ability of a switching power supply to adapt to the common use of different batteries is improved, and the cost is reduced. 本发明实施例提供了一种电池充电方法，应用于充电设备，所述充电设备与电池连接，所述方法包括：预充电阶段：采取第一电流对所述电池进行预充电，直至所述电池的充电电压达到第一电压阈值；均充电阶段：采用恒定的电流或电压对所述电池进行充电；浮充电阶段：采用恒定的第三电压对所述电池进行充电。通过电池充电曲线控制充电电压及充点电流，提高了电池的使用寿命，提高开关电源适应差异电池共用的能力，降低成本。