| 摘要 |
<p>PURPOSE: A battery charging circuit is provided to charge multiple unit batteries by efficiently forming a current path. CONSTITUTION: Multiple unit batteries(BAT1-BAT5) are serially connected to each other. Charging current route forming units(11_1-15_2) form a charging current route in a selected unit battery. A control unit(20) senses the charging state of multiple unit battery. The control unit controls duty ratio of the recharge control pulse by generating multiple selection signals. A charge power supply part(30) controls the voltage of the charging power source provided to the charging current route forming unit. [Reference numerals] (21) Charging control pulse generating unit; (22) Battery control unit; (AA) Two battery cells to be chargeable</p> |
