Patents by Inventor Akihiko Emori
Akihiko Emori 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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Publication number: 20080061740Abstract: Lower order control devices-control plural battery cells configuring plural battery modules. An input terminal of the low order control device in the highest potential, an output terminal of the low order control device in the lowest potential, and a high order control device are connected by isolating units, photocouplers. Diodes which prevent a discharge current of the battery cells in the battery modules are disposed between the output terminal of the low order control device and the battery cells in the battery module on the low potential side. Terminals related to input/output of a signal are electrically connected without isolating among the plural low order control devices.Type: ApplicationFiled: August 20, 2007Publication date: March 13, 2008Inventors: Hideki Miyazaki, Akihiko Emori, Akihiko Kudo, Tsuyoshi Kai
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Publication number: 20080054907Abstract: The present invention provides an assembled battery total voltage detection and leak detection apparatus which is reduced in size and is reduced in manufacturing costs. Detection of a total voltage is performed at a measurement time of a total voltage of an assembled battery 1 by connecting an output of a positive electrode resistance voltage dividing circuit composed of resistors 9 and 10 to + input of a differential amplifier 20 and connecting an output of a negative electrode resistance voltage dividing circuit composed of resistors 12 and 11 to ? input of the amplifier 20, and it performs leak detection at a leak detection time by connecting an output of a positive electrode resistance voltage dividing circuit to + input of the amplifier 20 and connecting + input of the amplifier 20 to the minus input of the differential amplifier 20 to measure an output voltage of the amplifier 20.Type: ApplicationFiled: April 17, 2007Publication date: March 6, 2008Applicant: HITACHI VEHICLE ENERGY, LTD.Inventors: Akihiko Kudo, Masaki Nagaoka, Akihiko Emori, Takahiro Kawata
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Publication number: 20080050645Abstract: A cell controller having excellent productivity is provided. A cell-con 80 has 12 ICs IC-1 to IC-2 mounted on a substrate, and these ICs detect voltages of respective cells constituting a cell pack, perform capacity adjustment on the respective cells, and are mounted two by two on rectangular longer sides of a rectangular continuous straight line L-L? defined on a substrate from the IC-1 on a highest potential side to the IC-12 on a lowest potential side continuously in order of potential differences of the corresponding cell packs. Distances between the rectangular shorter sides of the rectangular continuous straight line L-L? are the same. On the cell-con 80, between the IC-1 to IC-12 having different ground voltages, each of the ICs has signal output terminals connected to signal input terminals of a lower order IC respectively in an electrically non-insulated state.Type: ApplicationFiled: July 30, 2007Publication date: February 28, 2008Applicant: HITACHI VEHICLE ENERGY, LTD.Inventors: Tsuyoshi KAI, Tunemi AIBA, Akihiko KUDO, Yoshinori AOSHIMA, Akihiko EMORI
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Publication number: 20080030198Abstract: A communication means (105) of a battery monitoring device (101) receives setting information (measuring parameters) about the type or structure of a storage battery (102) to be monitored from a host system (106). A setting means (107) acquires the measuring parameters and performs setting for a measuring means (103) and a digital signal conversion means (104). In other words, the setting means (107) sets, in accordance with the type or structure of the storage battery (102), the measuring parameters (namely, the measuring time interval, the measuring channel number, the measurement range and the like) for the measuring means (103) and the digital signal conversion means (104). Thus, even when the type and construction of the storage battery (102) changes, state of charge and the like of the storage battery (102) can be accurately measured and monitored by the battery monitoring device (101).Type: ApplicationFiled: August 2, 2007Publication date: February 7, 2008Inventors: Takahiro KAWATA, Akihiko Emori, Youhei Kawahara, Hiroshi Arita
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Patent number: 7319333Abstract: A tracked vehicle has a power control apparatus for controlling charging and discharging of a plurality of storage devices. A voltage measuring device measures voltages of the respective storage devices, and a current measuring device measures currents flowing through the respective storage devices. A status detecting device detects the operating status of each storage device based on values measured by the voltage and current measuring devices; and a charging/discharging controlling device controls currents, voltages, or power according to the operating status of each storage device detected by the status detecting device, to charge or discharge the storage devices.Type: GrantFiled: January 9, 2006Date of Patent: January 15, 2008Assignee: Hitachi, Ltd.Inventors: Akihiko Emori, Eiichi Toyota, Masato Suzuki, Motomi Shimada, Tsutomu Miyauchi, Takuya Kinoshita, Hideki Miyazaki
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Publication number: 20070247106Abstract: When detecting an abnormality in some storage batteries, the hybrid vehicle control system separates the faulty storage batteries and leads the sound storage batteries to a high SOC.Type: ApplicationFiled: April 5, 2007Publication date: October 25, 2007Applicant: Hitachi, Ltd.Inventors: Youhei Kawahara, Akihiko Emori, Manabu Jyou, Yoshinori Aoshima
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Publication number: 20070145954Abstract: A battery management system which can output a battery state enabling optimum charge and discharge control to be performed even when a temperature variation occurs among individual single cells. A plurality of temperature sensors measure temperature values of a battery. A measurement unit measures a voltage and a current of the battery. A maximum/minimum temperature selection unit in a calculation unit determines a maximum temperature and a minimum temperature from the temperature values measured by the temperature sensors. An available power calculation unit calculates respective values of maximum available charge and discharge powers or maximum available charge and discharge currents of the battery corresponding to the maximum temperature and the minimum temperature based on the voltage and the current of the battery.Type: ApplicationFiled: December 14, 2006Publication date: June 28, 2007Applicant: Hitachi Vehicle Energy, Ltd.Inventors: Youhei Kawahara, Akihiko Emori, Shuko Yamauchi, Hirotaka Takahashi, Masami Shida, Yoshinori Aoshima
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Publication number: 20070108946Abstract: A secondary battery module includes a battery information storage unit for storing electric characteristic information and usage history information of the secondary battery module. A battery information management device and a terminal device respectively include interfaces to be connected to the secondary battery module. The battery information management device is provided with a battery information database. The battery information management device is connected to the terminal device through a communications network. In this way, battery information stored in the battery information storage unit, which is acquired by the battery information management device and the terminal device, is accumulated in the battery information database. Moreover, the battery information management device grades the secondary battery module for reuse based on the battery information and a predetermined threshold.Type: ApplicationFiled: November 14, 2006Publication date: May 17, 2007Inventors: Shuko Yamauchi, Youhei Kawahara, Akihiko Emori
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Patent number: 7173397Abstract: A battery performance monitoring system anticipates the sudden fall of battery output. The system measures the battery voltage at a time point when the discharge current of a battery becomes smaller than the reference current value or at a time point when the current to the load which is connected to the battery becomes smaller than the reference current value, and judges the battery to be abnormal if the difference of the measured battery voltage from the approximate formula in regard to the current-voltage relation in the former half of a same discharge event becomes out of the reference range.Type: GrantFiled: February 25, 2004Date of Patent: February 6, 2007Assignees: Hitachi, Ltd., Shin-Kobe Electric Machinery Co., Ltd.Inventors: Takuya Kinoshita, Hideki Miyazaki, Akihiko Emori, Tetsuro Okoshi, Tokiyoshi Hirasawa
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Publication number: 20070018613Abstract: Lower order control devices-control plural battery cells configuring plural battery modules. An input terminal of the low order control device in the highest potential, an output terminal of the low order control device in the lowest potential, and a high order control device are connected by isolating units, photocouplers. Diodes which prevent a discharge current of the battery cells in the battery modules are disposed between the output terminal of the low order control device and the battery cells in the battery module on the low potential side. Terminals related to input/output of a signal are electrically connected without isolating among the plural low order control devices.Type: ApplicationFiled: June 27, 2006Publication date: January 25, 2007Inventors: Hideki Miyazaki, Akihiko Emori, Akihiko Kudo, Tsuyoshi Kai
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Publication number: 20060247871Abstract: A state detecting system which can detect state of power storage at high precision even with lesser characteristic data to be used for calculation, and a device employing the same. The state detecting system has a memory for storing a characteristic data, calculation information, and set information, an arithmetic unit for calculating state information indicative of state of said power storage and calculating correction information for performing correction, a first correcting unit for correcting input of said arithmetic means, and a second correcting unit for correcting information stored or set in the storage.Type: ApplicationFiled: June 22, 2006Publication date: November 2, 2006Applicant: HITACHI, LTD.Inventors: Akihiko Emori, Akihiko Kudou, Shigeyuki Yoshihara, Hideki Miyazaki, Toshisada Mitsui, Mitsuyuki Hombu, Kazuyoshi Sasazawa
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Publication number: 20060208693Abstract: The aim of the invention is to provide a battery controller which is able to secure the number of rewrite time as required without replacement. The battery controller including a plurality of memory groups 104a to 104n comprising nonvolatile memories rewritable on the basis of one unit or plural units, a switch for selecting a memory group and a reader/writer 102 for writing or reading data into or from the memory groups, wherein the switch selects sequentially a memory group, according to a signal for writing from outside.Type: ApplicationFiled: March 15, 2006Publication date: September 21, 2006Inventors: Akihiko Emori, Youhei Kawahara, Hirotaka Takahashi, Fumio Murabayashi, Tokiyoshi Hirasawa, Tetsuro Okoshi
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Publication number: 20060202857Abstract: A status detector for a power supply, a power supply, and an initial characteristic extracting device for use with the power supply, each of which can detect the status of an electricity accumulating unit with high accuracy by sequentially modifying characteristic information necessary for the status detection of the electricity accumulating unit. A measuring unit obtains measured values of at least current, voltage and temperature of the electricity accumulating unit. A processing unit executes status detection of the electricity accumulating unit by using the measured values and the characteristic information of the electricity accumulating unit which is stored in a memory unit. A discrepancy detecting unit detects the presence of a discrepancy away from a theoretical value when a result of the status detection obtained by the processing unit is changed over a predetermined threshold or reversed with respect to the measured values obtained by the measuring unit.Type: ApplicationFiled: February 6, 2006Publication date: September 14, 2006Applicant: HITACHI VEHICLE ENERGY, LTD.Inventors: Youhei Kawahara, Akihiko Emori, Shuko Yamauchi, Hirotaka Takahashi, Masami Shida, Akihiko Kudo
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Patent number: 7091695Abstract: Lower order control devices control plural battery cells configuring plural battery modules. An input terminal of the low order control device in the highest potential, an output terminal of the low order control device in the lowest potential, and a high order control device are connected by isolating units, photocouplers. Diodes which prevent a discharge current of the battery cells in the battery modules are disposed between the output terminal of the low order control device and the battery cells in the battery module on the low potential side. Terminals related to input/output of a signal are electrically connected without isolating among the plural low order control devices.Type: GrantFiled: April 12, 2005Date of Patent: August 15, 2006Assignees: Hitachi, Ltd., Shin-Kobe Electric Machinery Co., Ltd.Inventors: Hideki Miyazaki, Akihiko Emori, Akihiko Kudo, Tsuyoshi Kai
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Patent number: 7085661Abstract: A state detecting system which can detect state of power storage at high precision even with lesser characteristic data to be used for calculation, and a device employing the same. The state detecting system has a memory for storing a characteristic data, calculation information, and set information, an arithmetic unit for calculating state information indicative of state of said power storage and calculating correction information for performing correction, a first correcting unit for correcting input of said arithmetic means, and a second correcting unit for correcting information stored or set in the storage.Type: GrantFiled: January 10, 2005Date of Patent: August 1, 2006Assignees: Hitachi, Ltd., Shin-Kobe Electric Machinery Co., Ltd.Inventors: Akihiko Emori, Akihiko Kudou, Shigeyuki Yoshihara, Hideki Miyazaki, Toshisada Mitsui, Mitsuyuki Hombu, Kazuyoshi Sasazawa
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Patent number: 7075306Abstract: A power control apparatus for controlling charging and discharging of a plurality of storage means devices has a voltage measuring arrangement for measuring voltages of each of the storage devices, a current measuring arrangement for measuring currents flowing through each of the storage devices, a status detector for detecting the operating status of each storage device from values measured by the voltage and current measuring arrangements, and a charging/discharging control device for controlling currents, voltages, or power according to the operating status of each storage devices detected by the status detector to charge or discharge the storage devices.Type: GrantFiled: September 19, 2005Date of Patent: July 11, 2006Assignee: Hitachi, Ltd.Inventors: Akihiko Emori, Eiichi Toyota, Masato Suzuki, Motomi Shimada, Tsutomu Miyauchi, Takuya Kinoshita, Hideki Miyazaki
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Publication number: 20060109008Abstract: A power control apparatus for controlling charging and discharging of a plurality of storage means (101a, . . . ) has voltage measuring means (102a, . . . ) for measuring voltages of said storage means respectively, current measuring means (103a, . . . ) for measuring currents flowing through said storage means respectively, a status detecting means (104) for detecting the operating status of each storage means from values measured by said voltage measuring means and said current measuring means, and a charging/discharging controlling means (105) for controlling currents, voltages, or power according to the operating status of each storage means detected by said status detecting means to charge or discharge said storage means.Type: ApplicationFiled: January 9, 2006Publication date: May 25, 2006Applicant: Hitachi, Ltd.Inventors: Akihiko Emori, Eiichi Toyota, Masato Suzuki, Motomi Shimada, Tsutomu Miyauchi, Takuya Kinoshita, Hideki Miyazaki
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Patent number: 7009401Abstract: Motor generator (MG) is controlled via motor controller by MG control processor of CPU, so that voltage and current of battery is detected while changing frequency of state detection current flowing in the secondary battery. According to the detection results, impedance is calculated in the impedance calculation unit. Remaining mount is calculated from the impedance obtained and the battery characteristics stored in memory. Furthermore, remaining amount change correction unit adds integration current between impedance measurements to the remaining amount for correcting the remaining amount. Weighting coefficient is determined from the standard deviation based on the corrected value and the remaining amount and weighted mean is calculated in weighted mean unit. Next, the result of the remaining amount calculation is used to perform service life calculation and service life correction calculation, and weighted mean is calculated in the same way as the remaining amount.Type: GrantFiled: August 8, 2003Date of Patent: March 7, 2006Assignees: Hitachi, Ltd., Shin-Kobe Electric Machinery Co., Ltd.Inventors: Takuya Kinoshita, Hideki Miyazaki, Akihiko Emori, Tokiyoshi Hirasawa
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Publication number: 20060012372Abstract: A power control apparatus for controlling charging and discharging of a plurality of storage devices has a voltage measuring arrangement for measuring voltages of each of the storage devices, a current measuring arrangement for measuring currents flowing through each of the storage devices, a status detector for detecting the operating status of each storage device from values measured by the voltage and current measuring arrangements, and a charging/discharging control device for controlling currents, voltages, or power according to the operating status of each storage devices detected by the status detector to charge or discharge the storage devices.Type: ApplicationFiled: September 19, 2005Publication date: January 19, 2006Applicant: Hitachi, Ltd.Inventors: Akihiko Emori, Eiichi Toyota, Masato Suzuki, Motomi Shimada, Tsutomu Miyauchi, Takuya Kinoshita, Hideki Miyazaki
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Patent number: 6977480Abstract: A power supply unit, a distributed power supply system and an electric vehicle loaded therewith, capable of charge/discharge operation are disclosed. A first cell group is connected in parallel to a second cell group in which the electrolytic solution can be electrolyzed or the generated gas can be recombined. A plurality of the parallel circuit pairs are connected in series, and the series circuit is connected with a charger/discharger to constitute the power supply unit. The charger/discharger charges the power supply unit up to a voltage at which the electrolytic solution of the second cell group is electrolyzed or the generated gas is recombined.Type: GrantFiled: November 10, 2004Date of Patent: December 20, 2005Assignee: Hitachi, Ltd.Inventors: Akihiko Emori, Takuya Kinoshita, Hideki Miyazaki