公开(公告)号：US10161980B2

公开(公告)日：2018-12-25

申请号：US15045402

申请日：2016-02-17

Applicant: FUJITSU TEN LIMITED

Inventor： Shota Kawanaka ,  Sho Tamura

IPC: G01R31/14 ,  G01R31/00 ,  G01R31/36 ,  G01R27/02

Abstract: A deterioration detecting apparatus includes: a capacitor that is connected to an insulated electric power source, and is charged and discharged; a voltage detecting unit that detects a voltage of the capacitor; and a deterioration detecting unit that detects a deterioration in insulating resistors of the electric power source on the basis of the voltage of the capacitor detected by the voltage detecting unit, in which the voltage detecting unit can detect the charged negative voltage of the capacitor.

公开(公告)号：US09995782B2

公开(公告)日：2018-06-12

申请号：US15362054

申请日：2016-11-28

Applicant: FUJITSU TEN LIMITED

Inventor： Shota Kawanaka ,  Sho Tamura

IPC: G01R31/12 ,  G01R31/00 ,  G01R27/02

CPC classification number: G01R31/1272 ,  G01R27/025 ,  G01R31/007

Abstract: An insulation problem detection apparatus includes a microcomputer configured to: control a voltage detecting circuit to measure an insulation resistance of a vehicle based on a voltage at which a capacitor in the vehicle is charged, the microcomputer controlling the voltage detecting circuit to connect the capacitor in series to a power supply mounted in the vehicle and a ground of a body of the vehicle to measure the voltage at which the capacitor is charged; obtain a total voltage of the power supply from an external apparatus that is external to the microcomputer when the insulation resistance of the vehicle is measured by the voltage detecting circuit; and detect whether there is an insulation problem of the vehicle based on (i) the total voltage of the power supply obtained from the external apparatus and (ii) the insulation resistance of the vehicle measured by the voltage detecting circuit.

公开(公告)号：US10386400B2

公开(公告)日：2019-08-20

申请号：US15401354

申请日：2017-01-09

Applicant: FUJITSU TEN LIMITED ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shota Kawanaka ,  Sho Tamura ,  Takahiro Okada ,  Hiromasa Tanaka

IPC: G01R31/00 ,  G01R31/12 ,  G01R31/327 ,  G01R31/02

Abstract: An abnormality detection device includes a measuring unit 14c and a determining unit 14d. The measuring unit 14c measures, among a power supply, a capacitor, a load circuit, a switch connecting the power supply to the load circuit, and ground of a vehicle body, which are mounted on a vehicle, a first voltage of the capacitor charged by serially connecting the power supply, the capacitor, and the body ground in a state where the switch is controlled to be turned off. The determining unit 14d determines that the switch is not fixed in an ON state and an insulation resistance of the vehicle is normal when the first voltage measured by the measuring unit 14c is less than a first threshold.

公开(公告)号：US10197619B2

公开(公告)日：2019-02-05

申请号：US15346156

申请日：2016-11-08

Applicant: FUJITSU TEN LIMITED

Inventor： Shota Kawanaka ,  Sho Tamura

IPC: G01R31/26 ,  B60L11/18 ,  G01R31/327 ,  G01R31/36 ,  G01R31/00

Abstract: A power supply monitoring apparatus includes: a plurality of power supplies that are connected in series; and a capacitor that is connected to each of positive and negative electrodes of the plurality of power supplies via a plurality of switch elements. The power supply monitoring apparatus determines states of the plurality of switch elements, using a voltage value of the capacitor that is acquired when a first switch element of the plurality of switch elements is turned on, the first switch element being connected to one of a total negative-electrode side and a total positive-electrode side of the plurality of power supplies.

公开(公告)号：US10114056B2

公开(公告)日：2018-10-30

申请号：US15433404

申请日：2017-02-15

Applicant: FUJITSU TEN LIMITED ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shota Kawanaka ,  Sho Tamura ,  Takahiro Okada ,  Hiromasa Tanaka ,  Mitsuyori Matsumura

IPC: G01R31/00 ,  G01R31/12 ,  G01R31/28 ,  G01R31/40

Abstract: A power-supply monitoring device includes a capacitor that is connected to an insulated electric power source to execute charging/discharging. A power-supply monitoring device including this capacitor forms a charging path for detecting deterioration in an insulation resistance of an electric power source, and detects a voltage of the capacitor when being charged through this charging path. A vehicle controller specifies an abnormal part based on whether or not the voltage of the capacitor detected by the power-supply monitoring device is within a predetermined range.

公开(公告)号：US10343524B2

公开(公告)日：2019-07-09

申请号：US15416811

申请日：2017-01-26

Applicant: FUJITSU TEN LIMITED

Inventor： Shota Kawanaka ,  Sho Tamura

IPC: G01R31/00 ,  G01R31/02 ,  B60L3/00 ,  G01R31/327

Abstract: A weld detection apparatus is mounted on a vehicle and measures first and second voltages of a first capacitor. The first voltage is measured when the first capacitor is charged while connected in series to a power supply and a ground of a vehicle body while switches that connect the power supply to a load circuit are controlled to be in a first state. The second voltage is measured at a predetermined timing, when the first capacitor is charged while connected in series to the power supply and the ground of the vehicle body while the switches are controlled to be in a second state different from the first state. The apparatus performs a weld detection process to decide which of the switches is welded in an ON-state when a difference between the first and second voltages is equal to or smaller than a predetermined threshold value.

公开(公告)号：US10241144B2

公开(公告)日：2019-03-26

申请号：US15014398

申请日：2016-02-03

Applicant: FUJITSU TEN LIMITED

Inventor： Sho Tamura

IPC: G01R31/02 ,  G01R35/00 ,  G01R31/00 ,  G01R27/02 ,  G01R31/36

Abstract: A deterioration detecting apparatus includes: a capacitor that is connected to an electric power source through a connection switch; a deterioration detection switch that is provided between the electric power source and a ground point; a charging-path forming unit that controls the connection switch and the deterioration detection switch, such that the electric power source, the capacitor, and the ground point are connected, to form a charging path for charging the capacitor; a voltage detecting unit that detects a voltage of the capacitor charged through the charging path; and a deterioration detecting unit that detects a deterioration in elements such as the capacitor positioned on the charging path, on the basis of the voltage of the capacitor detected by the voltage detecting unit.

公开(公告)号：US09960610B2

公开(公告)日：2018-05-01

申请号：US15044363

申请日：2016-02-16

Applicant: FUJITSU TEN LIMITED

Inventor： Sho Tamura ,  Hiroyuki Fuji

IPC: G01N27/416 ,  H02J7/00 ,  G01R31/36 ,  H02J7/34

CPC classification number: H02J7/0021 ,  G01R31/362 ,  G01R31/3658 ,  H02J7/345

Abstract: A flying capacitor type voltage detecting device which uses a capacitor to detect a voltage of each battery stack of a battery pack which includes a plurality of battery stacks each of which includes a plurality of battery cells connected in series, includes: a detecting unit that detects a voltage between both ends of the capacitor, as the voltage of each battery stack; and a branch line that is a single line which is branched from a connection line connecting the battery stacks and the detecting unit and connected to the capacitor and where a current during charging of the capacitor and a current during discharging of the capacitor flow in opposite directions.