公开(公告)号：US20200303787A1

公开(公告)日：2020-09-24

申请号：US16768376

申请日：2018-11-30

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

Inventor： Kiyohito MACHIDA ,  Hiroki TASHIRO ,  Yoshihiro UCHIDA ,  Nobuyuki TANAKA ,  Masaki UCHIYAMA

IPC: H01M10/44 ,  B60L58/12 ,  B60L58/21 ,  H01M10/42 ,  H01M10/48 ,  G01R31/389

Abstract: A secondary battery system includes an assembled battery that includes a plurality of blocks that are connected in series to one another. Each of the plurality of the blocks includes same number of cells that are connected in parallel to one another. A control device is configured to calculate an internal resistance ratio and a protection current. The internal resistance ratio is a value obtained by dividing the higher one of internal resistances by the lower one of the internal resistances of two of the plurality of the blocks. The protection current is a value obtained by multiplying the internal resistance ratio by a current value of the assembled battery detected by a current sensor. The control device is configured to perform the charge-discharge control based on the protection current.

公开(公告)号：US20190017901A1

公开(公告)日：2019-01-17

申请号：US16016811

申请日：2018-06-25

Applicant: DENSO CORPORATION

Inventor： Nobuyuki TANAKA ,  Hiroki KAKUI ,  Yuji IWAMA ,  Satoshi NISHIMOTO

IPC: G01M15/10

Abstract: An air-fuel ratio (A/F) sensor control device includes: an impedance detector detecting an impedance of an A/F sensor; and a pump current controller performing a digital control on a supply of electric current to the A/F sensor. The pump current controller includes a PID calculator calculating an instruction current value according to a difference of two input values, i.e., the difference between a PID control target value and a detection value of an inter-terminal voltage of a Nernst cell; and a protection clamper limiting a supply of electric current to a pump cell based on the instruction current value and the impedance. The protection clamper includes: a current clamp threshold calculator calculating an upper limit value and a lower limit value of the electric current based on the impedance of the Nernst cell, a first current value limiter limiting the instruction current value by the upper limit value and the lower limit value, and a second current value limiter performing a constant current limitation on an instruction current limit value by using an instruction constant current value.