Patents by Inventor Hiroto NISHIGUCHI
Hiroto NISHIGUCHI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11793382Abstract: A motor in a dust collector is cooled. The dust collector includes a body housing, a motor located inside the body housing, a cooling fan rotatable by the motor to feed a gas to around the motor and to discharge the gas from around the motor, and a support including a channel through which the gas is flown by the cooling fan. The support supports the motor.Type: GrantFiled: December 16, 2021Date of Patent: October 24, 2023Assignee: MAKITA CORPORATIONInventors: Takayuki Tahara, Hiroto Nishiguchi
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Publication number: 20220233042Abstract: A motor in a dust collector is cooled. The dust collector includes a body housing, a motor located inside the body housing, a cooling fan rotatable by the motor to feed a gas to around the motor and to discharge the gas from around the motor, and a support including a channel through which the gas is flown by the cooling fan. The support supports the motor.Type: ApplicationFiled: December 16, 2021Publication date: July 28, 2022Applicant: MAKITA CORPORATIONInventors: Takayuki TAHARA, Hiroto NISHIGUCHI
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Patent number: 10459035Abstract: A method of estimating a state of charge of a lithium ion battery, which uses a lithium phosphate compound having an olivine-type crystal structure for a positive electrode and uses an active material exhibiting no potential fluctuation due to an insertion/desorption reaction of lithium for a negative electrode, based on a voltage change rate. The method includes: storing a map representing a correspondence relationship between the voltage change rate and the state of charge at a plurality of charging/discharging rates; obtaining a candidate for a present state of charge from an actually measured voltage change rate, by referring to the map; and obtaining the present state of charge through a comparison between the candidate for the state of charge obtained during the charging and the candidate for the state of charge obtained during the discharging.Type: GrantFiled: July 12, 2016Date of Patent: October 29, 2019Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Daigo Takemura, Hiroto Nishiguchi
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Patent number: 10355517Abstract: The present invention provides a storage-battery control device 1 capable of enhancing economical efficiency by controlling charge state of a storage battery 12 so that surplus power generated by photovoltaic generation can be entirely charged into the storage battery 12 even in a case where power cannot be sold to a system power supply 50.Type: GrantFiled: May 25, 2016Date of Patent: July 16, 2019Assignee: Mitsubishi Electric CorporationInventors: Satoshi Hara, Makiko Kise, Shigeru Aihara, Hiroto Nishiguchi, Takahito Ida, Tomoki Takegami
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Patent number: 10254345Abstract: Final state-of-charge calculation means is provided which calculates a final state-of-charge of the battery according to state-of-charge estimate values by electric current integration mode state-of-charge estimation means and equivalent circuit model mode state-of-charge estimation means. The final state-of-charge calculation means performs, when a difference between the state-of-charge estimate value by the electric current integration mode state-of-charge estimation means and the state-of-charge estimate value by the equivalent circuit model mode state-of-charge estimation means becomes less than or equal to the state-of-charge difference threshold value, switching of the final state-of-charge from the state-of-charge estimate value by the electric current integration mode state-of-charge estimation means to the state-of-charge estimate value by the equivalent circuit model mode state-of-charge estimation means.Type: GrantFiled: April 3, 2015Date of Patent: April 9, 2019Assignee: Mitsubishi Electric CorporationInventors: Hideaki Tani, Satoshi Wachi, Hiroyuki Saito, Hiroto Nishiguchi, Keisuke Ogasawara
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Patent number: 10254346Abstract: A State of Charge (SOC) estimation device is provided for a secondary battery in which a correlation curve indicating a relationship between an SOC and Open Circuit Voltage (OCV) differs between a charging process and discharging process. The SOC estimation device estimates the SOC based on a relational formula in which as measured OCV increases, weights are assigned to the correlation curve for the discharging process, and as the measured OCV decreases, weights are assigned to the correlation curve for the charging process. Thus, the SOC estimation device provides accurate SOC estimates regardless of whether the secondary battery is being used or not.Type: GrantFiled: November 28, 2014Date of Patent: April 9, 2019Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Hiroto Nishiguchi, Hisatoshi Fukumoto, Shingo Yamaguchi
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Publication number: 20180203071Abstract: A method of estimating a state of charge of a lithium ion battery, which uses a lithium phosphate compound having an olivine-type crystal structure for a positive electrode and uses an active material exhibiting no potential fluctuation due to an insertion/desorption reaction of lithium for a negative electrode, based on a voltage change rate. The method includes: storing a map representing a correspondence relationship between the voltage change rate and the state of charge at a plurality of charging/discharging rates; obtaining a candidate for a present state of charge from an actually measured voltage change rate, by referring to the map; and obtaining the present state of charge through a comparison between the candidate for the state of charge obtained during the charging and the candidate for the state of charge obtained during the discharging.Type: ApplicationFiled: July 12, 2016Publication date: July 19, 2018Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Daigo TAKEMURA, Hiroto NISHIGUCHI
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Publication number: 20180175660Abstract: The present invention provides a storage-battery control device 1 capable of enhancing economical efficiency by controlling charge state of a storage battery 12 so that surplus power generated by photovoltaic generation can be entirely charged into the storage battery 12 even in a case where power cannot be sold to a system power supply 50.Type: ApplicationFiled: May 25, 2016Publication date: June 21, 2018Applicant: Mitsubishi Electric CorporationInventors: Satoshi HARA, Makiko KISE, Shigeru AIHARA, Hiroto NISHIGUCHI, Takahito IDA, Tomoki TAKEGAMI
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Patent number: 9977087Abstract: This invention is concerning a device including a current calculator that calculates remaining capacity difference current on the basis of a first remaining battery capacity reflected on open-circuit voltage of a battery and a second remaining battery capacity not reflected on the open-circuit voltage, a first remaining capacity estimator that estimates the first remaining battery capacity on the basis of a value produced by removing the remaining capacity difference current from the current value of the battery and the inter-terminal voltage of the battery, a second remaining capacity calculator that calculates the second remaining battery capacity by adding up the remaining capacity difference current, and an adder that obtains a remaining battery capacity of the battery by adding the estimate of the first remaining battery capacity and the calculation value of the second remaining battery capacity.Type: GrantFiled: February 5, 2015Date of Patent: May 22, 2018Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Toshihiro Wada, Hisatoshi Fukumoto, Hiroto Nishiguchi
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Publication number: 20170350943Abstract: Final state-of-charge calculation means is provided which calculates a final state-of-charge of the battery according to state-of-charge estimate values by electric current integration mode state-of-charge estimation means and equivalent circuit model mode state-of-charge estimation means. The final state-of-charge calculation means performs, when a difference between the state-of-charge estimate value by the electric current integration mode state-of-charge estimation means and the state-of-charge estimate value by the equivalent circuit model mode state-of-charge estimation means becomes less than or equal to the state-of-charge difference threshold value, switching of the final state-of-charge from the state-of-charge estimate value by the electric current integration mode state-of-charge estimation means to the state-of-charge estimate value by the equivalent circuit model mode state-of-charge estimation means.Type: ApplicationFiled: April 3, 2015Publication date: December 7, 2017Applicant: Mitsubishi Electric CorporationInventors: Hideaki TANI, Satoshi WACHI, Hiroyuki SAITO, Hiroto NISHIGUCHI, Keisuke OGASAWARA
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Publication number: 20170038431Abstract: This invention is concerning a device including a current calculator that calculates remaining capacity difference current on the basis of a first remaining battery capacity reflected on open-circuit voltage of a battery and a second remaining battery capacity not reflected on the open-circuit voltage, a first remaining capacity estimator that estimates the first remaining battery capacity on the basis of a value produced by removing the remaining capacity difference current from the current value of the battery and the inter-terminal voltage of the battery, a second remaining capacity calculator that calculates the second remaining battery capacity by adding up the remaining capacity difference current, and an adder that obtains a remaining battery capacity of the battery by adding the estimate of the first remaining battery capacity and the calculation value of the second remaining battery capacity.Type: ApplicationFiled: February 5, 2015Publication date: February 9, 2017Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Toshihiro WADA, Hisatoshi FUKUMOTO, Hiroto NISHIGUCHI
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Publication number: 20170010327Abstract: A State of Charge (SOC) estimation device for a secondary battery in which a correlation curve indicating a relationship between an SOC and Open Circuit Voltage (OCV) differs between a charging process and discharging process. The SOC estimation device estimates the SOC based on a relational formula in which as actually measured OCV increases, weights are assigned to the correlation curve indicating the relationship between the SOC and OCV in the discharging process, and as actually measured OCV decreases, weights are assigned to the correlation curve indicating the relationship between the SOC and OCV in the charging process. With the SOC estimation device, when the correlation curve indicating the relationship between the SOC and OCV differs between the charging and discharging processes, not only when the secondary battery is being used but also when use is started after use of the secondary battery is stopped, SOC can be accurately estimated.Type: ApplicationFiled: November 28, 2014Publication date: January 12, 2017Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hiroto NISHIGUCHI, Hisatoshi FUKUMOTO, Shingo YAMAGUCHI