公开(公告)号：US5844398A

公开(公告)日：1998-12-01

申请号：US260655

申请日：1994-06-16

Applicant: Hing-Hin Kwan ,  Yao-Ching Chen ,  Cheng-Chih Chu ,  Shu-Chin Chen ,  Chun-Sheng Wang

Inventor： Hing-Hin Kwan ,  Yao-Ching Chen ,  Cheng-Chih Chu ,  Shu-Chin Chen ,  Chun-Sheng Wang

IPC: H01M10/44 ,  H01M10/46 ,  H02J7/00

CPC classification number: H02J7/0029 ,  H01M10/46 ,  H02J7/0075 ,  H02J7/0083 ,  H01M10/44 ,  Y02B40/90 ,  Y02E70/40

Abstract: An automatic charging system for charging nickel-metal-hydride batteries is presented. The battery charging system uses a method of detecting the lowest charge current to control its charging process. The system has a constant voltage power supply including a short-circuit protection device, a battery voltage detector, a current detector, a current to voltage converter, a voltage amplifier, an analog to digital converter, a single chip microcomputer, a capacity indicator, a time indicator and a full-charge indicator. The system uses a constant voltage to charge batteries with a floating current according to the quantity of the active ions in the batteries. The battery charge current is converted to a voltage signal which is then amplified and digitized. The microcomputer detects the digitized signal to estimate the magnitude of the charge current. By detecting continuous increase in the charge current, the system determines if the charging process has reached its end and shuts down the power supply at appropriate time. It avoids providing too much input energy and generating extra heat. Therefore, the system has high charging efficiency and is less likely to damage the batteries.

Abstract translation: 介绍了镍氢电池充电自动充电系统。 电池充电系统使用检测最低充电电流来控制其充电过程的方法。 该系统具有恒压电源，包括短路保护装置，电池电压检测器，电流检测器，电流 - 电压转换器，电压放大器，模数转换器，单片机，容量指示器， 时间指示器和满充电指示器。 系统使用恒定电压，根据电池中活性离子的数量，以浮动电流对电池充电。 电池充电电流被转换成电压信号，然后被放大和数字化。 微型计算机检测数字化信号以估计充电电流的大小。 通过检测充电电流的持续增加，系统确定充电过程是否已到达终端，并在适当的时间关闭电源。 它避免提供太多的输入能量和产生额外的热量。 因此，该系统具有高的充电效率，并且不太可能损坏电池。