公开(公告)号：US20140232412A1

公开(公告)日：2014-08-21

申请号：US14179975

申请日：2014-02-13

Applicant: Seiko Instruments Inc.

Inventor： Kazuaki SANO

IPC: G01R31/36

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：US20150380774A1

公开(公告)日：2015-12-31

申请号：US14753722

申请日：2015-06-29

Applicant: Seiko Instruments Inc.

Inventor： Toshiyuki KOIKE ,  Kazuaki SANO ,  Atsushi SAKURAI ,  Hiroshi MUKAINAKANO

IPC: H01M10/42 ,  H01M10/48 ,  G01R31/36

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.

Abstract translation: 提供了能够高精度地预测二次电池的充电状态的电池状态监视电路和电池装置。 电池状态监视电路包括二次电池的伪等效电路，并且使流过检测电阻器的电流流到二次电池的伪等效电路，从而测量二次电池的伪开路电压 电池。

公开(公告)号：US20140167702A1

公开(公告)日：2014-06-19

申请号：US14106122

申请日：2013-12-13

Applicant: Seiko Instruments Inc.

Inventor： Atsushi SAKURAI ,  Kazuaki SANO ,  Toshiyuki KOIKE ,  Shinya FUKUCHI

IPC: H02J7/00

CPC classification number: H02J7/0029 ,  H02J2007/0039

Abstract: There are provided an overcurrent protection circuit which has a smaller circuit area, a charging and discharging control circuit, and a compact battery device. The charging and discharging control circuit includes an overcurrent detection circuit which monitors the voltage of an overcurrent detection resistor connected to an overcurrent detection terminal and which detects the flow of an overcurrent into a secondary battery, an overcurrent release circuit which monitors the voltage at a terminal to which a load is connected through a voltage step-down circuit connected to an overcurrent release terminal and which detects the removal of a load, and a clamping circuit connected to the overcurrent release terminal are provided. The voltage at the overcurrent release terminal is clamped by the voltage step-down circuit and the clamping circuit.

Abstract translation: 提供了具有较小电路面积的过电流保护电路，充放电控制电路和小型电池装置。 充放电控制电路包括过电流检测电路，其监测与过电流检测端子连接的过电流检测电阻器的电压，并检测过电流流入二次电池;过电流释放电路，其监视端子处的电压 通过连接到过电流释放端子的电压降压电路连接负载并检测负载的移除，并且提供连接到过电流释放端子的钳位电路。 过电流释放端子上的电压由降压电路和钳位电路钳位。