公开(公告)号：US20150219721A1

公开(公告)日：2015-08-06

申请号：US14169667

申请日：2014-01-31

Applicant: Analog Devices Technology

Inventor： Hua-Jung Yang ,  Janne Klemetti

IPC: G01R31/36

CPC classification number: G01R31/3651 ,  G01R31/3624 ,  G01R31/3675 ,  H02J7/0016 ,  H02J7/0021 ,  H02J7/0031 ,  H02J7/0036 ,  H02J7/0073

Abstract: A device to determine a state of a battery is disclosed. One or more transistors provide a resistance between first and second nodes. The one or more transistors are configured to conduct a supply current from a battery between the first node and the second node. A measurement circuit measures the voltage generated between the first node and the second node. The measurement circuit further measures the supply voltage. A calculation circuit generates an estimate of the supply current based on the voltage measured between the first node and the second node and the resistance of the one or more transistors. The calculation circuit generates an estimate of the state of charge of the battery based on the measured supply voltage and the estimate of the supply current.

Abstract translation: 公开了一种确定电池状态的装置。 一个或多个晶体管提供第一和第二节点之间的电阻。 一个或多个晶体管被配置为在第一节点和第二节点之间从电池传导供电电流。 测量电路测量在第一节点和第二节点之间产生的电压。 测量电路进一步测量电源电压。 计算电路基于在第一节点和第二节点之间测量的电压和一个或多个晶体管的电阻来产生供电电流的估计。 计算电路基于所测量的电源电压和电源电流的估计，产生电池的充电状态的估计。