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公开(公告)号：US11422197B2
公开(公告)日：2022-08-23
申请号：US17124950
申请日：2020-12-17
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA , DENSO CORPORATION
Inventor： Yoshiki Sugino , Yoshihiro Uchida , Tetsuya Watanabe
IPC: G01R31/389 , G01R31/3842 , H02J7/14
Abstract: A battery system includes a controller that performs a calculation to calculate an internal resistance of a battery, and executes a predetermined operation based on the result. The calculation includes obtaining a regression line through a regression analysis of a current-voltage plot obtained from voltage sensor and current sensor, and calculating the internal resistance from a slope of the regression line. The controller calculates a first internal resistance through the calculation based on a first group of detection values of the voltage and current detected a plurality of times, and calculate a second internal resistance through the calculation based on a second group of detection values. The controller executes the predetermined operation when a resistance difference between the first and second internal resistances is smaller than a reference value, and does not execute the operation when the resistance difference is larger than the reference value.
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Patent Agency Ranking
公开(公告)号：US12117494B2
公开(公告)日：2024-10-15
申请号：US17896261
申请日：2022-08-26
Applicant: DENSO CORPORATION
Inventor： Takuma Nakagawa , Shogo Shigemori , Tatsuhiro Numata , Tetsuya Watanabe , Masaki Uchiyama , Taisuke Kurachi
IPC: G01R31/371 , G01R31/3842 , G01R31/392 , G01R31/396 , H02J7/00
CPC classification number: G01R31/371 , G01R31/3842 , G01R31/392 , G01R31/396 , H02J7/00032 , H02J7/0048 , H02J7/005
Abstract: A battery management system includes a monitoring device and a controller. The monitoring device is arranged in a housing accommodating a battery. The monitoring device monitors the battery and acquires battery monitoring information that includes information indicating a state of the battery. The controller performs wireless communication with the monitoring device and executes a predetermined process based on the battery monitoring information. The monitoring device holds imperfect information that is battery monitoring information indicating failure of data transmission/reception between the monitoring device and the controller. The monitoring device retransmits information corresponding to the imperfect information from next time the battery monitoring information is transmitted.
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公开(公告)号：US12265130B2
公开(公告)日：2025-04-01
申请号：US17896200
申请日：2022-08-26
Applicant: DENSO CORPORATION
Inventor： Shogo Shigemori , Tatsuhiro Numata , Tetsuya Watanabe
IPC: G01R31/371 , G01R31/396 , H02J7/00 , H04W84/20
Abstract: A monitoring system includes monitoring devices provided in a monitored device, and a controller that wirelessly communicates with the monitoring devices to acquire monitoring information. In an operating state of the monitored device, the controller and the monitoring devices establish individual connections in which the controller acting as a communication master performs wireless communication with each of the monitoring devices acting as communication slaves. In a non-operating state of the monitored device, the controller and the monitoring devices maintain communication between the controller and the monitoring devices by establishing a sequential connection. In the sequential connection, the controller acting as a communication master performs wireless communication with one of the monitoring devices acting as a communication slave, and one of the monitoring devices, in sequence, acting as a communication master performs wireless communication with another one of the monitoring devices acting as a communication slave.
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公开(公告)号：US12105153B2
公开(公告)日：2024-10-01
申请号：US17896179
申请日：2022-08-26
Applicant: DENSO CORPORATION
Inventor： Takuya Ohata , Shogo Shigemori , Tatsuhiro Numata , Tetsuya Watanabe , Masaki Uchiyama , Taisuke Kurachi
IPC: G01R31/3842 , G01R31/371 , G01R31/389 , G01R31/392 , H02J7/00
CPC classification number: G01R31/3842 , G01R31/371 , G01R31/389 , G01R31/392 , H02J7/00032 , H02J7/0047
Abstract: A battery management system includes a monitoring device and a controller. The monitoring device is arranged in a housing accommodating a battery, monitors the battery and acquires battery monitoring information that includes information indicating a state of the battery. The controller performs wireless communication with the monitoring device and execute a predetermined process based on the battery monitoring information. The controller transmits a request for battery monitoring information to the monitoring device. The monitoring device transmits the battery monitoring information to the controller in response to the request. The controller determines whether missing of the battery monitoring information has occurred based on a correlation between the battery monitoring information acquired from the monitoring device via wireless communication and relationship information held by the controller related to the battery monitoring information.
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公开(公告)号：US11342769B2
公开(公告)日：2022-05-24
申请号：US16508597
申请日：2019-07-11
Applicant: DENSO CORPORATION
Inventor： Tetsuya Watanabe , Yuki Tachibana , Hiroki Fujii
Abstract: A control device comprises an acquisition unit that acquires a current to or from the battery and a voltage of a battery, a calculation unit that calculates an internal resistance of the battery based on the current and the voltage when the regenerative power generation is performed by a rotary electric machine, and a permission determination unit that determines whether to permit an automatic stop of an engine depending on whether restarting of the engine is enabled based on power running drive of the rotary electric machine. The calculation unit calculates a value of the internal resistance each time the regenerative power generation or the power running drive is performed before the engine enters an automatic stop state. The permission determination unit determines whether to permit the automatic stop based on a latest value of the internal resistance among values of the internal resistance calculated by the calculation unit.
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公开(公告)号：US20210190871A1
公开(公告)日：2021-06-24
申请号：US17124950
申请日：2020-12-17
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA , DENSO CORPORATION
Inventor： Yoshiki SUGINO , Yoshihiro Uchida , Tetsuya Watanabe
IPC: G01R31/389 , G01R31/3842
Abstract: A battery system includes a controller that performs a calculation to calculate an internal resistance of a battery, and executes a predetermined operation based on the result. The calculation includes obtaining a regression line through a regression analysis of a current-voltage plot obtained from voltage sensor and current sensor, and calculating the internal resistance from a slope of the regression line. The controller calculates a first internal resistance through the calculation based on a first group of detection values of the voltage and current detected a plurality of times, and calculate a second internal resistance through the calculation based on a second group of detection values. The controller executes the predetermined operation when a resistance difference between the first and second internal resistances is smaller than a reference value, and does not execute the operation when the resistance difference is larger than the reference value.
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