公开(公告)号：US09647469B2

公开(公告)日：2017-05-09

申请号：US14189451

申请日：2014-02-25

Applicant: Seiko Instruments Inc.

Inventor： Atsushi Sakurai ,  Fumihiko Maetani

IPC: H02J7/00 ,  H02J7/14

CPC classification number: H02J7/0029 ,  H02J7/0011 ,  H02J7/0031 ,  H02J7/007 ,  H02J7/0072 ,  H02J2007/0039

Abstract: Provided is a highly safe battery device in which the accuracy of an overcurrent detection current value is high. A charge and discharge control circuit includes an overcurrent detecting terminal, an overcurrent detecting circuit for detecting overcurrent of a secondary battery, the overcurrent detecting circuit being connected to the overcurrent detecting terminal, and a constant current circuit for causing a current to flow to the overcurrent detecting terminal.

公开(公告)号：US09525296B2

公开(公告)日：2016-12-20

申请号：US14564739

申请日：2014-12-09

Applicant: Seiko Instruments Inc.

Inventor： Takashi Ono ,  Fumihiko Maetani ,  Toshiyuki Koike

IPC: H02J7/00

CPC classification number: H02J7/0063 ,  H02J7/0031 ,  H02J2007/0039

Abstract: Provided is a battery device with high convenience, which is capable of setting overcurrent release impedance to be low. The battery device includes: a first comparator circuit for detecting an overcurrent based on a first reference voltage; and a second comparator circuit for outputting an overcurrent release voltage control signal based on a second reference voltage that is higher than the first reference voltage.

Abstract translation: 提供了一种高度方便的电池装置，其能够将过电流释放阻抗设定为低。 电池装置包括：第一比较器电路，用于基于第一参考电压检测过电流; 以及第二比较器电路，用于基于高于第一参考电压的第二参考电压输出过电流释放电压控制信号。

公开(公告)号：US09673656B2

公开(公告)日：2017-06-06

申请号：US14711307

申请日：2015-05-13

Applicant: Seiko Instruments Inc.

Inventor： Takashi Ono ,  Toshiyuki Koike ,  Satoshi Abe ,  Fumihiko Maetani

IPC: H02J7/00

CPC classification number: H02J7/0072 ,  H02J7/0029 ,  H02J2007/0039

Abstract: Provided is a highly safe battery device in which the accuracy of an overcurrent detection current value and a short-circuit current value is improved and current consumption is reduced. A short-circuit and overcurrent detecting circuit includes: a reference voltage circuit configured to output a reference voltage generated when a constant current flows through an impedance element and a transistor having a resistance value that is changed depending on a voltage of a secondary battery; a first comparator circuit configured to compare a voltage of an overcurrent detecting terminal with the reference voltage; and a second comparator circuit configured to compare a voltage based on the voltage of the overcurrent detecting terminal with the reference voltage.

公开(公告)号：US09748789B2

公开(公告)日：2017-08-29

申请号：US14202602

申请日：2014-03-10

Applicant: Seiko Instruments Inc.

Inventor： Fumihiko Maetani ,  Toshiyuki Koike

IPC: H02J7/00 ,  H02H7/18

CPC classification number: H02J7/0078 ,  H02H7/18 ,  H02J7/0031 ,  H02J2007/0039

Abstract: There is provided a battery device in which the accuracy of an over-current detection current value is high to have high safety. In a charging/discharging control circuit, a reference voltage circuit of an over-current detection circuit is configured to include a constant current circuit, a resistor, and a transistor having a resistance value that varies with a voltage of a secondary cell, that are connected to both ends of the secondary cell, and outputs, as a reference voltage, a voltage that is generated due to the flowing of a current of the constant current circuit to the resistor and the transistor.

公开(公告)号：US09647465B2

公开(公告)日：2017-05-09

申请号：US14711343

申请日：2015-05-13

Applicant: Seiko Instruments Inc.

Inventor： Takashi Ono ,  Toshiyuki Koike ,  Satoshi Abe ,  Fumihiko Maetani

IPC: H02J7/00 ,  G01R31/36 ,  G01R31/02

CPC classification number: H02J7/00 ,  G01R31/025 ,  G01R31/3606 ,  H02J7/0029 ,  H02J7/0063 ,  H02J7/0072 ,  H02J7/0077 ,  H02J2007/0039 ,  H02J2007/0067

Abstract: A short-circuit and overcurrent detecting circuit includes a reference voltage circuit including a constant current circuit, a first impedance element, a first transistor having a resistance value depending a voltage of a secondary battery, a second impedance element, and a second transistor having a resistance value depending the voltage of the secondary battery, which are connected in series. The reference voltage circuit outputs a first reference voltage from a node of the constant current circuit and the first impedance element, and outputs a second reference voltage from a node of the first transistor and the second impedance element. The short-circuit and overcurrent detecting circuit further includes: a first comparator circuit for comparing a voltage of an overcurrent detecting terminal with the first reference voltage; and a second comparator circuit for comparing the voltage of the overcurrent detecting terminal with the second reference voltage.