公开(公告)号：US11482868B2

公开(公告)日：2022-10-25

申请号：US16509979

申请日：2019-07-12

申请人： Daichi Yamashita ,  Norihito Kawaguchi ,  Yoshihiro Satake ,  Nobuhito Tanaka ,  Koji Koshimizu

发明人： Daichi Yamashita ,  Norihito Kawaguchi ,  Yoshihiro Satake ,  Nobuhito Tanaka ,  Koji Koshimizu

IPC分类号： H02J7/00 ,  H02H7/18 ,  H01M10/44 ,  H02H1/00

摘要： A secondary battery protection circuit for a secondary battery includes: a reference voltage circuit configured to generate a reference voltage by using a depletion-type transistor and a transistor unit of enhancement type connected in series with the depletion-type transistor; a voltage divider configured to output a detection voltage obtained by dividing a power source voltage of the secondary battery; a detection circuit configured to detect an abnormal state of the secondary battery based on the reference voltage and the detection voltage; a first adjustment circuit configured to adjust a size ratio of the depletion-type transistor to the transistor unit based on threshold voltages of the depletion-type transistor and the transistor unit; and a second adjustment circuit configured to adjust the detection voltage based on the reference voltage after adjusting the size ratio.

公开(公告)号：US09755442B2

公开(公告)日：2017-09-05

申请号：US14953544

申请日：2015-11-30

申请人： Ryota Kageyama ,  Tsutomu Yamauchi ,  Nobuhito Tanaka ,  Takashi Takeda ,  Yoshihiro Satake ,  Takeshi Yamaguchi ,  Koji Koshimizu ,  Norihito Kawaguchi

发明人： Ryota Kageyama ,  Tsutomu Yamauchi ,  Nobuhito Tanaka ,  Takashi Takeda ,  Yoshihiro Satake ,  Takeshi Yamaguchi ,  Koji Koshimizu ,  Norihito Kawaguchi

IPC分类号： H02J7/00 ,  H02J7/14

CPC分类号： H02J7/0029 ,  H02J7/0016 ,  H02J7/0021 ,  H02J7/0026 ,  H02J7/0031 ,  H02J7/0073 ,  H02J2007/0037

摘要： A battery protection IC has detection circuits to detect faults of an overcharge, an over-discharge, and an overcurrent of a secondary battery; a control circuit to protect the secondary battery, by controlling (dis)charging the secondary battery upon the fault; and a delay circuit to generate delay after the fault before the controlling. The IC includes a memory unit to store data for setting and adjusting a circuit characteristic of the IC; and a setting circuit to set and adjust the circuit characteristic, based on the data from the memory unit. The memory unit includes a pair of non-volatile memory cells to complementarily store one bit, and a latch circuit directly cross-coupled with the memory cells, for each bit of the data. The latch circuit statically outputs the data from the memory cells to the setting circuit when the IC is turned on.

公开(公告)号：US10170919B2

公开(公告)日：2019-01-01

申请号：US15622272

申请日：2017-06-14

申请人： Nobuhito Tanaka ,  Yoshihiro Satake ,  Norihito Kawaguchi ,  Koji Koshimizu ,  Kaoru Usui ,  Yusuke Ohba

发明人： Nobuhito Tanaka ,  Yoshihiro Satake ,  Norihito Kawaguchi ,  Koji Koshimizu ,  Kaoru Usui ,  Yusuke Ohba

IPC分类号： H02J7/00 ,  H01L23/49 ,  H01L23/495 ,  H01L23/00

摘要： A battery protecting apparatus includes: a charging/discharging control chip including a charging control FET and a discharging control FET connected to a secondary battery; a protecting chip configured to control, based on a voltage between both ends of the secondary battery, the FETs to prevent overcharging, over discharging, and an overcurrent; and a lead frame having a connection surface for a plurality of external terminals and another surface in conduction with the connection surface. Said another surface is electrically connected, via a conductive material, to terminals of the FETs formed on a front surface of the charging/discharging control chip. A back surface of the protecting chip faces a back surface of the charging/discharging control chip via an insulative member. Terminals of the protecting chip are electrically connected to said another surface through bonding wires. The charging/discharging control chip and the protecting chip are covered by a resin.

公开(公告)号：US09553469B2

公开(公告)日：2017-01-24

申请号：US14865167

申请日：2015-09-25

申请人： Ryota Kageyama ,  Tsutomu Yamauchi ,  Norihito Kawaguchi ,  Nobuhito Tanaka ,  Takashi Takeda ,  Yoshihiro Satake ,  Takeshi Yamaguchi ,  Koji Koshimizu

发明人： Ryota Kageyama ,  Tsutomu Yamauchi ,  Norihito Kawaguchi ,  Nobuhito Tanaka ,  Takashi Takeda ,  Yoshihiro Satake ,  Takeshi Yamaguchi ,  Koji Koshimizu

IPC分类号： H02J7/00

CPC分类号： H02J7/0029 ,  H02J2007/0037 ,  H02J2007/0039 ,  H02J2007/004

摘要： There is provided a method of correcting an overcurrent detection voltage of a battery protection integrated circuit including a current path between a first terminal and a second terminal, one or more transistors for controlling current of a secondary battery, an overcurrent detection circuit and a control circuit. The method comprises the steps of: measuring a resistance value between the first terminal and the second terminal wherein the one or more transistors are turned on at a predetermined temperature; estimating resistance values between the first terminal and the second terminal at respective temperatures based on the measured resistance value; calculating adjusting data for canceling temperature dependency of charge or discharge current of the secondary battery based on the measured resistance value and the estimated resistance values, wherein a value of the charge or discharge current varies depending on temperature; correcting the overcurrent detection voltage based on the calculated adjusting data.

摘要翻译： 提供一种校正包括第一端子和第二端子之间的电流路径的电池保护集成电路的过电流检测电压的方法，用于控制二次电池的电流的一个或多个晶体管，过电流检测电路和控制电路 。 该方法包括以下步骤：测量第一端子和第二端子之间的电阻值，其中一个或多个晶体管在预定温度下导通; 基于所测量的电阻值，在相应的温度下估计第一端子和第二端子之间的电阻值; 基于所测量的电阻值和所估计的电阻值计算用于消除二次电池的充电或放电电流的温度依赖性的调整数据，其中充电或放电电流的值根据温度而变化; 基于计算出的调整数据来校正过电流检测电压。

公开(公告)号：US09680299B2

公开(公告)日：2017-06-13

申请号：US14857899

申请日：2015-09-18

申请人： Nobuhito Tanaka ,  Norihito Kawaguchi

发明人： Nobuhito Tanaka ,  Norihito Kawaguchi

IPC分类号： H02H9/02 ,  H02J7/00 ,  H01M2/34 ,  H01M10/0525 ,  H02H7/18 ,  H05K1/02

CPC分类号： H02H9/025 ,  H01M2/34 ,  H01M10/0525 ,  H01M10/425 ,  H01M2200/00 ,  H02H7/18 ,  H02J7/0031 ,  H05K1/02

摘要： A battery protection integrated circuit includes a switch unit; a control unit that controls on and off of the switch unit based on a monitored result; a package; a plurality of external connection terminals that are electrically connected to a plurality of terminal portions of the switch unit and the control unit, respectively, all of the external connection terminals that are to be connected to a first terminal of a circuit board being provided at a first short side of the terminal providing surface that faces one of board short sides of a circuit board, and all of the external connection terminals that are to be connected to a second terminal of the circuit board being provided at a second short side that is opposite to the first short side, when being mounted on the circuit board.