公开(公告)号：JP2012080696A

公开(公告)日：2012-04-19

申请号：JP2010224851

申请日：2010-10-04

Applicant: Lenovo Singapore Pte Ltd ,  レノボ・シンガポール・プライベート・リミテッド

Inventor： ODAOHARA SHIGEFUMI ,  TIMLAP WONG ,  KENNETH SCOTT SEIZURE

IPC: H02J7/10 ,  H01M10/44 ,  H02M3/155

CPC classification number: H02J7/045 ,  H02M3/1588 ,  Y02B40/90 ,  Y02B70/1466

Abstract: PROBLEM TO BE SOLVED: To provide a charging system capable of implementing charging at a high charging current, using a switching element having a small capacity.SOLUTION: A charging control circuit 150 switching-controls FETs 103, 105 by a PWM control system to charge a battery pack 21 including a lithium secondary battery capable of quick charging. The charging control circuit sets a switching frequency at 200 kHz during constant-current charging and sets the frequency at 400 kHz around the end of constant-current charging. Switching of the switching frequency is implemented by a frequency switching circuit 130, based on a switching signal generated when an output voltage reaches a predetermined value. The switching signal is generated so that a protective circuit of the battery pack comes into no action due to output ripple voltage.

Abstract translation: 要解决的问题：提供一种能够利用具有小容量的开关元件在高充电电流下实现充电的充电系统。 解决方案：充电控制电路150通过PWM控制系统对FET103,105进行开关控制，以对包括能够快速充电的锂二次电池的电池组21进行充电。 充电控制电路在恒定电流充电期间将开关频率设置为200 kHz，并在恒流充电结束时将频率设置为400 kHz。 基于当输出电压达到预定值时产生的开关信号，开关频率的切换由频率切换电路130实现。 产生开关信号，使得电池组的保护电路由于输出纹波电压而不起作用。 版权所有（C）2012，JPO＆INPIT