Patents by Inventor Sho Shiraga
Sho Shiraga 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).
-
Publication number: 20240053408Abstract: An ammeter measures current when a storage battery having a plurality of single batteries connected in series is charged or discharged. A voltmeter measures total voltage of the storage battery. A calculation device calculates dV/dt obtained by differentiating the total voltage with respect to time on the basis of a relationship between the total voltage and charging time or discharging time, separates a characteristic peak obtained by a dV/dt curve into peaks for the respective single batteries, and diagnoses soundness of the storage battery on the basis of the separated peaks.Type: ApplicationFiled: February 25, 2021Publication date: February 15, 2024Applicant: Mitsubishi Electric CorporationInventors: Sho SHIRAGA, Tomoki TAKEGAMI
-
Publication number: 20230243893Abstract: A battery degradation prediction device includes a battery monitoring device that monitors a charge rate SOC of a battery and a temperature T of the battery, and a computing device that computes a capacity residual rate f(t) of the battery on the basis of the charge rate SOC, the temperature T, and an elapsed time t from start of monitoring of the battery. The capacity residual rate f(t) is computed using a first function formula including a first formula. The first formula includes an exponential function having, as a variable, a value obtained by multiplying the elapsed time t by a degradation coefficient a and ?1. The battery degradation prediction device predicts a degradation state of the battery on the basis of the capacity residual rate f(t) computed using the first function formula.Type: ApplicationFiled: July 8, 2020Publication date: August 3, 2023Applicant: Mitsubishi Electric CorporationInventors: Sho SHIRAGA, Keisuke OGASAWARA
-
Patent number: 10763554Abstract: A deteriorated capacity calculator calculates a deteriorated capacity that is a capacity reduced from the capacity of a cell in an initial state. A gas amount calculator calculates an amount of gas contained in a container for the cell, from the deteriorated capacity. A pressure calculator calculates a pressure inside the container for the cell from the amount of the gas, a volume of a void space of the container for the cell and the temperature of the cell. A pressure monitor outputs a control signal for stopping charging or discharging of the battery when the pressure inside the container for at least any one cell is equal to or greater than a threshold pressure.Type: GrantFiled: May 17, 2016Date of Patent: September 1, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yukihiro Yoshida, Sho Shiraga, Satoshi Hara, Yuruki Okada
-
Patent number: 10615468Abstract: Battery cells are disposed apart from each other in a housing of a battery module included in a power storage device. In the battery module, a partition member is provided that divides a space in the housing into a high temperature region, which contains battery cells located centrally in a disposal direction of the battery cells, and a low temperature region, which contains battery cells located at end portions in the disposal direction of the battery cells. The cooling air flow supplied from a fan passes between the battery cells in the high temperature region, passes through ventilation holes provided in the partition members, enters the low temperature region, passes between the battery cells in the low temperature region, passes through a discharge hole, and flows outside of the housing.Type: GrantFiled: May 27, 2015Date of Patent: April 7, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yukihiro Yoshida, Yuruki Okada, Sho Shiraga, Tomoki Takegami, Toshihiro Wada
-
Publication number: 20190148796Abstract: A deteriorated capacity calculator calculates a deteriorated capacity that is a capacity reduced from the capacity of a cell in an initial state. A gas amount calculator calculates an amount of gas contained in a container for the cell, from the deteriorated capacity. A pressure calculator calculates a pressure inside the container for the cell from the amount of the gas, a volume of a void space of the container for the cell and the temperature of the cell. A pressure monitor outputs a control signal for stopping charging or discharging of the battery when the pressure inside the container for at least any one cell is equal to or greater than a threshold pressure.Type: ApplicationFiled: May 17, 2016Publication date: May 16, 2019Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yukihiro Yoshida, Sho Shiraga, Satoshi Hara, Yuruki Okada
-
Patent number: 10211490Abstract: A storage battery deterioration measurement device and a power storage system are provided which measure deterioration in unit batteries included in an assembled battery constituting a storage battery in a shorter time than conventional devices and systems, and which include a control unit to acquire information based on the states of the multiple unit batteries and a deterioration determination unit to detect the unit battery indicating the maximum value among the information acquired by the control unit and the unit battery indicating the minimum value thereamong, and to detect deterioration in the unit batteries on the basis of the difference between a per-predetermined-period variation of information on the unit battery indicating the maximum value and a per-predetermined-period variation of information on the unit battery indicating the minimum value.Type: GrantFiled: April 9, 2014Date of Patent: February 19, 2019Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yuruki Okada, Sho Shiraga, Toshihiro Wada, Shoji Yoshioka
-
Publication number: 20180151925Abstract: Battery cells are disposed apart from each other in a housing of a battery module included in a power storage device. In the battery module, a partition member is provided that divides a space in the housing into a high temperature region, which contains battery cells located centrally in a disposal direction of the battery cells, and a low temperature region, which contains battery cells located at end portions in the disposal direction of the battery cells. The cooling air flow supplied from a fan passes between the battery cells in the high temperature region, passes through ventilation holes provided in the partition members, enters the low temperature region, passes between the battery cells in the low temperature region, passes through a discharge hole, and flows outside of the housing.Type: ApplicationFiled: May 27, 2015Publication date: May 31, 2018Applicant: Mitsubishi Electric CorporationInventors: Yukihiro YOSHIDA, Yuruki OKADA, Sho SHIRAGA, Tomoki TAKEGAMI, Toshihiro WADA
-
Patent number: 9910099Abstract: A controller of a battery monitoring apparatus, said controller calculating the amount of heat generated inside a battery on the basis of information about the electric current which flows out of or flows into the battery. Furthermore, the controller calculates the amount of heat discharged from the surface of the battery, said amount being calculated on the basis of temperature information about at least one from among the surface of the battery and a substance in the vicinity of the battery. In addition, the controller calculates the temperature inside the battery on the basis of information about the amount of heat generated, and information about the amount of heat discharged.Type: GrantFiled: January 30, 2013Date of Patent: March 6, 2018Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yuruki Okada, Sho Shiraga, Toshihiro Wada, Shoji Yoshioka
-
Patent number: 9711979Abstract: In a power supply system using various kinds of storage batteries such as a large capacity storage battery or a small capacity storage battery, an electric power path is complicated, which may increase failures such as a short circuit trouble. There is a problem in that, when a short circuit trouble between storage batteries occurs, damage to a smaller capacity storage battery is serious. Accordingly, in a power supply system according to the present invention, the relationship among voltages, current capacities, and electric power capacities of various kinds of storage batteries such as a large capacity storage battery or a small capacity storage battery is defined so that damage to the storage batteries may be minimized even when malfunction occurs in, for example, switching a switch, and energy transfers from a higher voltage storage device.Type: GrantFiled: March 5, 2015Date of Patent: July 18, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Daigo Takemura, Sho Shiraga, Toshihiro Wada, Shoji Yoshioka, Shigeki Harada, Hiroshi Araki, Hisanori Yamasaki
-
Publication number: 20170125856Abstract: A storage battery deterioration measurement device and a power storage system are provided which measure deterioration in unit batteries included in an assembled battery constituting a storage battery in a shorter time than conventional devices and systems, and which include a control unit to acquire information based on the states of the multiple unit batteries and a deterioration determination unit to detect the unit battery indicating the maximum value among the information acquired by the control unit and the unit battery indicating the minimum value thereamong, and to detect deterioration in the unit batteries on the basis of the difference between a per-predetermined-period variation of information on the unit battery indicating the maximum value and a per-predetermined-period variation of information on the unit battery indicating the minimum value.Type: ApplicationFiled: April 9, 2014Publication date: May 4, 2017Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yuruki OKADA, Sho SHIRAGA, Toshihiro WADA, Shoji YOSHIOKA
-
Patent number: 9599676Abstract: Switches change the resistance value of a charge/discharge circuit in a period from starting a discharging at an upper limit voltage until the voltage reaches a lower limit voltage. An electric charge estimator computes electric charge by time-integrating current from a start of the discharging to an arbitrarily determined time, and computes a relationship between electric charge and voltage of a power storage device. An internal resistance estimator computes internal resistance based on voltages and currents of the storage device at times when resistance values are different. An electric energy estimator computes a relationship between electric charge and open voltage based on electric charge, voltage, current and internal resistance of the storage device. During charging or discharging of the storage device, the electric energy estimator estimates the electric energy of the power storage device based on the electric charge, the open voltage, the internal resistance, and the charge/discharge current.Type: GrantFiled: March 18, 2013Date of Patent: March 21, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yuruki Okada, Sho Shiraga, Toshihiro Wada, Shoji Yoshioka
-
Patent number: 9564768Abstract: A battery-condition monitoring device that monitors a condition of the battery through discharge thereof includes a discharger and a discharge control device. The discharger includes a discharge circuit having a load resistor and a switching element connected in series between a positive electrode of the battery and a negative electrode thereof. The discharge control device controls an open/close operation of the switching element. The discharge control device adjusts the resistance value of the load resistor in the discharger, thereby enabling an adjustment of a discharge current.Type: GrantFiled: April 12, 2012Date of Patent: February 7, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Keita Hatanaka, Sho Shiraga, Toshihiro Wada, Shoji Yoshioka
-
Publication number: 20170012445Abstract: In a power supply system using various kinds of storage batteries such as a large capacity storage battery or a small capacity storage battery, an electric power path is complicated, which may increase failures such as a short circuit trouble. There is a problem in that, when a short circuit trouble between storage batteries occurs, damage to a smaller capacity storage battery is serious. Accordingly, in a power supply system according to the present invention, the relationship among voltages, current capacities, and electric power capacities of various kinds of storage batteries such as a large capacity storage battery or a small capacity storage battery is defined so that damage to the storage batteries may be minimized even when malfunction occurs in, for example, switching a switch, and energy transfers from a higher voltage storage device.Type: ApplicationFiled: March 5, 2015Publication date: January 12, 2017Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Daigo TAKEMURA, Sho SHIRAGA, Toshihiro WADA, Shoji YOSHIOKA, Shigeki HARADA, Hiroshi ARAKI, Hisanori YAMASAKI
-
Publication number: 20160245870Abstract: Switches change the resistance value of a charge/discharge circuit in a period from starting a discharging at an upper limit voltage until the voltage reaches a lower limit voltage. An electric charge estimator computes electric charge by time-integrating current from a start of the discharging to an arbitrarily determined time, and computes a relationship between electric charge and voltage of a power storage device. An internal resistance estimator computes internal resistance based on voltages and currents of the storage device at times when resistance values are different. An electric energy estimator computes a relationship between electric charge and open voltage based on electric charge, voltage, current and internal resistance of the storage device. During charging or discharging of the storage device, the electric energy estimator estimates the electric energy of the power storage device based on the electric charge, the open voltage, the internal resistance, and the charge/discharge current.Type: ApplicationFiled: March 18, 2013Publication date: August 25, 2016Applicant: Mitsubishi Electric CorporationInventors: Yuruki OKADA, Sho SHIRAGA, Toshihiro WADA, Shoji YOSHIOKA
-
Publication number: 20160146896Abstract: A controller of a battery monitoring apparatus, said controller calculating the amount of heat generated inside a battery on the basis of information about the electric current which flows out of or flows into the battery. Furthermore, the controller calculates the amount of heat discharged from the surface of the battery, said amount being calculated on the basis of temperature information about at least one from among the surface of the battery and a substance in the vicinity of the battery. In addition, the controller calculates the temperature inside the battery on the basis of information about the amount of heat generated, and information about the amount of heat discharged.Type: ApplicationFiled: January 30, 2013Publication date: May 26, 2016Applicant: Mitsubishi Electric CorporationInventors: Yuruki OKADA, Sho SHIRAGA, Toshihiro WADA, Shoji YOSHIOKA
-
Publication number: 20150369870Abstract: Switches change the resistance value of a charge/discharge circuit in a period from starting a discharging at an upper limit voltage until the voltage reaches a lower limit voltage. An electric charge estimator computes electric charge by time-integrating current from a start of the discharging to an arbitrarily determined time, and computes a relationship between electric charge and voltage of a power storage device. An internal resistance estimator computes internal resistance based on voltages and currents of the storage device at times when resistance values are different. An electric energy estimator computes a relationship between electric charge and open voltage based on electric charge, voltage, current and internal resistance of the storage device. During charging or discharging of the storage device, the electric energy estimator estimates the electric energy of the power storage device based on the electric charge, the open voltage, the internal resistance, and the charge/discharge current.Type: ApplicationFiled: March 18, 2013Publication date: December 24, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yuruki OKADA, Sho SHIRAGA, Toshihiro WADA, Shoj i YOSHIOKA
-
Publication number: 20150331059Abstract: A controller of a battery monitoring apparatus, said controller calculating the amount of heat generated inside a battery on the basis of information about the electric current which flows out of or flows into the battery. Furthermore, the controller calculates the amount of heat discharged from the surface of the battery, said amount being calculated on the basis of temperature information about at least one from among the surface of the battery and a substance in the vicinity of the battery. In addition, the controller calculates the temperature inside the battery on the basis of information about the amount of heat generated, and information about the amount of heat discharged.Type: ApplicationFiled: January 30, 2013Publication date: November 19, 2015Inventors: Yuruki OKADA, Sho SHIRAGA, Toshihiro WADA, Shoji YOSHIOKA
-
Publication number: 20150061601Abstract: A battery-condition monitoring device that monitors a condition of the battery through discharge thereof includes a discharger and a discharge control device. The discharger includes a discharge circuit having a load resistor and a switching element connected in series between a positive electrode of the battery and a negative electrode thereof. The discharge control device controls an open/close operation of the switching element. The discharge control device adjusts the resistance value of the load resistor in the discharger, thereby enabling an adjustment of a discharge current.Type: ApplicationFiled: April 12, 2012Publication date: March 5, 2015Applicant: Mitsubishi Electric CorporationInventors: Keita Hatanaka, Sho Shiraga, Toshihiro Wada, Shoji Yoshioka
-
Patent number: 8438842Abstract: An exhaust gas purification device is provided. The device includes: in an exhaust gas passage for a combustion exhaust gas containing a nitrogen oxide, a hydrocarbon, and an oxygen in a larger amount than a theoretical reaction amount with respect to the hydrocarbon to flow therethrough, in order from upstream, a first catalyst part for selectively reducing a nitrogen oxide; a plasma discharge part for generating a plasma; a second catalyst part for selectively reducing a nitrogen oxide; and a purifying catalyst part for purifying a reducing agent.Type: GrantFiled: March 25, 2009Date of Patent: May 14, 2013Assignee: Mitsubishi Electric CorporationInventors: Minoru Sato, Sho Shiraga, Kazuhiko Kawajiri, Masato Kurahashi
-
Publication number: 20090249772Abstract: An exhaust gas purification device is provided. The device includes: in an exhaust gas passage for a combustion exhaust gas containing a nitrogen oxide, a hydrocarbon, and an oxygen in a larger amount than a theoretical reaction amount with respect to the hydrocarbon to flow therethrough, in order from upstream, a first catalyst part for selectively reducing a nitrogen oxide; a plasma discharge part for generating a plasma; a second catalyst part for selectively reducing a nitrogen oxide; and a purifying catalyst part for purifying a reducing agent.Type: ApplicationFiled: March 25, 2009Publication date: October 8, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Minoru SATO, Sho SHIRAGA, Kazuhiko KAWAJIRI, Masato KURAHASHI