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公开(公告)号：US20180003775A1
公开(公告)日：2018-01-04
申请号：US15707506
申请日：2017-09-18
Inventor： DAICHI HASHIMOTO , TAKASHI NAKAZAWA , HARUHIKO SEKINO
CPC classification number: G01R31/396 , B60L3/0069 , B60L58/21 , B60L2240/547 , G01R19/00 , G01R31/44 , H01M10/48 , H01M10/482 , H02J7/0021 , H02J7/02 , Y02T10/7005 , Y02T10/7055 , Y02T10/7061
Abstract: A failure in any of first switches is determined based on a voltage value of a battery assembly and a predetermined threshold. The voltage value is retained in a capacitor by turning on or off the first switches and a second switch, and obtained from a voltage detector a voltage value.
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公开(公告)号：US20170299648A1
公开(公告)日：2017-10-19
申请号：US15516425
申请日：2015-10-23
Inventor： DAICHI HASHIMOTO , TAKASHI NAKAZAWA , HARUHIKO SEKINO
IPC: G01R31/12 , G01R31/317 , H04B3/56
CPC classification number: G01R31/1272 , B60L3/0069 , G01N1/00 , G01N2201/00 , G01R1/00 , G01R27/18 , G01R31/006 , G01R31/025 , G01R31/31706 , H04B3/56
Abstract: An abnormality detection device includes: a coupling-capacitor having a first-end and a second-end coupled with a high-voltage circuit; a signal output unit; a signal extraction unit; and a signal input unit. The signal output unit is coupled with the first-end of the coupling-capacitor via a detection-resistor, and outputs an alternating-current inspection-signal. The signal extraction unit extracts the inspection-signal, as an extraction-signal, output between the detection-resistor and the coupling-capacitor. The signal input unit detects abnormality of insulation resistance of the high-voltage circuit based on a level of the inputted extraction-signal. The signal extraction unit includes a signal removing filter and a subtraction circuit. The filter removes a signal equal in frequency to the inspection-signal and passes low-frequency noises lower in frequency than the inspection-signal. The subtraction circuit outputs a differential signal, as the extraction-signal, between a signal having passed through the filter and a signal not having passed through the filter.
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3.发明申请公开(公告)号：US20200049768A1
公开(公告)日：2020-02-13
申请号：US16655591
申请日：2019-10-17
Inventor： KOJI MATSUKAWA , TAKASHI NAKAZAWA , SHIGEO MASAI
IPC: G01R31/327 , H01H47/00 , G01R31/00
Abstract: A relay welding detection device includes a voltage generator, first and second resistor strings, and a relay welding detector. A first relay is disposed on a first wiring line connecting a load to a first terminal of a direct-current power supply of a vehicle, and a second relay is disposed on a second wiring line connecting the load to a second terminal of the direct-current power supply. The first resistor string is connected in series to the first terminal of the direct-current power supply and the voltage generator therebetween, and the second resistor string is connected in series to the second terminal of the direct-current power supply and the voltage generator therebetween. The relay welding detector detects a potential at a connection point of two resistors of each of the first and second resistor strings to detect presence or absence of welding in the first relay and the second relay.
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公开(公告)号：US20180106865A1
公开(公告)日：2018-04-19
申请号：US15554987
申请日：2016-02-25
Inventor： DAICHI HASHIMOTO , TAKASHI NAKAZAWA , HARUHIKO SEKINO
CPC classification number: G01R31/36 , B60L3/0046 , B60L58/10 , B60L58/22 , G01R31/024 , G01R31/026 , G01R31/3835 , G01R31/392 , G01R31/396 , H01M10/441 , H01M10/482 , H01M2220/20 , H02J7/0016 , H02J7/0021 , H02J7/0026 , H02J7/0029
Abstract: An abnormality detecting device detects abnormalities in a system including a plurality of battery assemblies each having a plurality of cells connected in series, and includes: a connecting component configured to connect and disconnect adjacent two of the battery assemblies; and a detachment detector configured to detect whether or not the connecting component has been detached.
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