초록 ▼

A battery charger for use with different types of batteries, such as batteries requiring constant current charging, such as nickel cadmium (NiCd) and nickel metal hydride (NiMH) batteries, as well as batteries which not only require constant current charging, but also require constant voltage chargi

A battery charger for use with different types of batteries, such as batteries requiring constant current charging, such as nickel cadmium (NiCd) and nickel metal hydride (NiMH) batteries, as well as batteries which not only require constant current charging, but also require constant voltage charging, such as lithium ion batteries. The battery charger includes a pulse width modulator circuit for controlling a power transistor to provide a constant current or a constant voltage output as a function of the battery characteristics. The battery charger may include dual pockets for charging two modular batteries on a time division multiplex basis. In the dual pocket application, power is divided between the two pockets as a function of the charging characteristics of the battery and the power dissipation of the power transistors used for supplying charging current to the pockets.

대표청구항 ▼

[ What is claimed and desired to be secured by Letters Patent of the United States is:] [7.] A multipocket battery charger connected to a predetermined power supply, the battery charger comprising:a first pocket for receiving a first battery;a first power transistor connected between said power supp

[ What is claimed and desired to be secured by Letters Patent of the United States is:] [7.] A multipocket battery charger connected to a predetermined power supply, the battery charger comprising:a first pocket for receiving a first battery;a first power transistor connected between said power supply and said first pocket;means for controlling said first power transistor to provide a constant current output to said first pocket;a second pocket for receiving a second battery;a second power transistor connected between said power supply and said second pocket;means for sensing the power dissipation of said power supply; andmeans for controlling said first power transistor and said second power transistor so that the electrical power to said first pocket and said second pocket as a function of the power dissipation of said power supply.