公开(公告)号：US09366730B2

公开(公告)日：2016-06-14

申请号：US14179975

申请日：2014-02-13

Applicant: Seiko Instruments Inc.

Inventor： Kazuaki Sano

IPC: H02J7/00 ,  H02J7/14 ,  G01R31/36 ,  G01R19/165 ,  G01R19/00 ,  G01R19/10

CPC classification number: G01R31/3658 ,  G01R19/0084 ,  G01R19/10 ,  G01R19/16542 ,  G01R31/362 ,  H02J7/0021

Abstract: There is provided a battery voltage detector circuit which uses a multiplexer system and which is capable of reducing the influence of the deviation of a detected voltage attributable to a parasitic capacitance, thus improving the accuracy of voltage detection. The battery voltage detector circuit that monitors the voltages of a plurality of batteries connected in series includes a flying capacitor, a multiplexer switch that sequentially connects the flying capacitor to the plurality of batteries, a voltage detecting unit that detects the voltage of the flying capacitor, a first reference potential detecting unit connected to one terminal of the flying capacitor, a second reference potential connecting unit connected to the other terminal of the flying capacitor, and a control circuit that controls the multiplexer switch, the first reference potential connecting unit and the second reference potential connecting unit.

Abstract translation: 提供了一种使用多路复用器系统的电池电压检测器电路，其能够减小归因于寄生电容的检测电压的偏差的影响，从而提高电压检测的精度。 监视串联连接的多个电池的电压的电池电压检测电路包括飞行电容器，将飞跨电容器顺序地连接到多个电池的多路开关，检测飞行电容器的电压的电压检测单元， 连接到飞行电容器的一个端子的第一参考电位检测单元，连接到飞行电容器的另一个端子的第二参考电位连接单元和控制多路复用器开关的控制电路，第一参考电位连接单元和第二参考电位连接单元 参考电位连接单元。

公开(公告)号：US09812743B2

公开(公告)日：2017-11-07

申请号：US14753722

申请日：2015-06-29

Applicant: Seiko Instruments Inc.

Inventor： Toshiyuki Koike ,  Kazuaki Sano ,  Atsushi Sakurai ,  Hiroshi Mukainakano

IPC: H02J7/00 ,  H02J7/04 ,  G01N27/416 ,  H01M10/48 ,  G01R31/36 ,  H01M10/44

CPC classification number: H01M10/48 ,  G01R31/3606 ,  G01R31/3662 ,  H01M10/44

Abstract: Provided is a battery state monitoring circuit and a battery device capable of predicting a state of charge of a secondary battery with high accuracy. The battery state monitoring circuit includes a pseudo-equivalent circuit of the secondary battery, and causes a current flowing through a sense resistor to flow to the pseudo-equivalent circuit of the secondary battery, to thereby measure a pseudo-open circuit voltage of the secondary battery.