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1.发明申请公开(公告)号：US20150094967A1
公开(公告)日：2015-04-02
申请号：US14484303
申请日：2014-09-12
Applicant: Hitachi, Ltd.
Inventor： Toru KOUNO , Tetsuharu OHYA , Yuuichi NAGAYAMA , Tomoharu NAKAMURA , Koki MORIKAWA , Satoshi MIYAZAKI
IPC: G01R31/40
CPC classification number: H02S50/00 , G01R31/025 , H02H1/0015
Abstract: A failure diagnosis system is configured to calculate an estimated irradiation on a first photovoltaic string and an estimated operating temperature of the first photovoltaic string based on a short-circuit current and an open-circuit voltage on a current-voltage characteristic of the first photovoltaic string, and the array output voltage value and the array output current value measured by an array measurement apparatus. The failure diagnosis system is configured to calculate an estimated current value of the first photovoltaic string based on the estimated irradiation, the estimated operating temperature, and the current-voltage characteristic. The failure diagnosis system is configured to diagnose degradation of the first photovoltaic string by comparing the measured current value of the first photovoltaic string and the estimated current value.
Abstract translation: 故障诊断系统被配置为基于第一光伏电池的电流 - 电压特性上的短路电流和开路电压来计算第一光伏电池串上的估计照射和第一光伏电池的估计工作温度 ，阵列输出电压值和阵列输出电流值由阵列测量装置测量。 故障诊断系统被配置为基于估计的照射，估计的工作温度和电流 - 电压特性来计算第一光伏电池的估计电流值。 故障诊断系统被配置为通过比较测量的第一光伏电池的电流值和估计的电流值来诊断第一光伏电池的劣化。
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公开(公告)号：US20230378759A1
公开(公告)日：2023-11-23
申请号：US18031361
申请日：2021-10-06
Applicant: HITACHI, LTD.
Inventor： Ryo WAKABAYASHI , Toru KOUNO , Satoru AKIYAMA , Emha Bayu MIFTAHULLATIF , Katsutoshi KONDO
CPC classification number: H02J3/381 , H02J3/32 , H02J2300/24
Abstract: An object of the invention is to provide a control technique capable of connecting a storage battery to a DC bus via a DC/DC converter and controlling charging and discharging of the storage battery by the DC/DC converter. A DC grid system according to the invention calculates a voltage command value of a DC bus using a present voltage of a storage battery and a target voltage of the storage battery, and provides the voltage command value as a command value for each of an AC/DC converter and a DC/DC converter (see FIG. 1).
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公开(公告)号：US20200341064A1
公开(公告)日：2020-10-29
申请号：US16822405
申请日：2020-03-18
Applicant: Hitachi, Ltd.
Inventor： Emhabayu MIFTAHULLATIF , Toru KOUNO
IPC: G01R31/367 , G01R31/382 , H01M2/10 , H01M10/48
Abstract: Provided is a battery estimation system comprising a processor and a storage device coupled to the processor. The storage device stores accelerated test data obtained by measuring change in degree of deterioration of a rechargeable battery cell at a predetermined temperature. The processor calculates a relationship between the temperature and the magnitude of an activation energy of the rechargeable battery cell on the basis of the accelerated test data, calculates a temperature as a maximum temperature on the basis of the relationship between the temperature and the magnitude of the activation energy of the rechargeable battery cell, the calculated temperature being a temperature at which the magnitude of the activation energy changes from decreasing to increasing in response to increase in the temperature, and determines a temperature equal to or less than the maximum temperature as a temperature to be used in an accelerated test.
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公开(公告)号：US20160233830A1
公开(公告)日：2016-08-11
申请号：US15018244
申请日：2016-02-08
Applicant: Hitachi, Ltd.
Inventor： Toru KOUNO , Tetsuharu OHYA , Yuuichi NAGAYAMA , Tomoharu NAKAMURA
IPC: H02S50/10
CPC classification number: H02S50/10
Abstract: Provided is a technology that enables sensing of a solar battery string failure even with a smaller change in output, and that enables identification of a factor causing the failure. A monitor device in a solar power generation system performs: (i) a process of extracting a first time band indicating a minimum amount of solar radiation and a second time band indicating a maximum amount of solar radiation in a day; (ii) a process of calculating, using a ratio of operation current and short-circuit current in a solar battery array, an expected electric power value of a solar battery string to be inspected in each of the first and second time bands; (iii) a process of calculating, from measurement electric power values of the solar battery string to be inspected in the first and second time bands, the expected electric power value of the first time band, and the expected electric power value of the second time band, first and second electric power losses in the first and second time bands; and (iv) a process of detecting a failure in the solar battery string to be inspected based on the first and second electric power losses (FIG. 7).
Abstract translation: 提供了即使具有较小的输出变化也能够感测太阳能电池组故障的技术，并且能够识别引起故障的因素。 太阳能发电系统中的监视装置执行以下操作：（i）提取表示太阳辐射的最小量的第一时间带和表示一天中的最大太阳辐射量的第二时间带的处理; （ii）使用太阳能电池阵列中的工作电流和短路电流的比例来计算在第一和第二时间带中的每个中要检查的太阳能电池串的预期电功率值的处理; （iii）从第一和第二时间带中待检查的太阳能电池串的测量电功率值计算第一时间段的预期电功率值和第二时间段的预期电功率值的处理 第一和第二时间带中的第一和第二功率损耗; 以及（iv）基于第一和第二电力损失检测待检查的太阳能电池串的故障的处理（图7）。
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Patent Agency Ranking
公开(公告)号：US20150090312A1
公开(公告)日：2015-04-02
申请号：US14484304
申请日：2014-09-12
Applicant: Hitachi, Ltd.
Inventor： Toru KOUNO , Yuuichi NAGAYAMA , Masaaki FUJIMORI , Tomoharu NAKAMURA , Koki MORIKAWA
CPC classification number: H01L31/02008 , G06F17/50 , G06F17/5068 , H02S10/00 , Y02E10/50
Abstract: A power generating system comprising: a plurality of power generating units coupled in parallel; a power collecting device for collecting electric power output from the plurality of power generating units; and wirings for coupling the plurality of power generating units and the power collecting device. A ratio of a conductor diameter to a predetermined length of each of the wirings is defined as a reference ratio. A value obtained by multiplying the reference ratio, a number of the wirings, and a loss generated by a specific wiring together is subtracted from a value obtained by multiplying a predetermined number of wirings for adjustment by a ratio of a conductor diameter to a length of the specific wiring. A total of the ratios of the conductor diameters to the lengths of the predetermined number of the wirings for adjustment is determined as a value less than the subtracted value.
Abstract translation: 一种发电系统，包括：并联耦合的多个发电单元; 用于收集从所述多个发电单元输出的电力的集电装置; 以及用于联接多个发电单元和电力收集装置的配线。 每个布线的导体直径与预定长度的比率被定义为参考比。 将通过将参考比，布线数量和由特定布线产生的损耗一起获得的值从通过将预定数量的用于调整的布线的布线乘以导体直径与导体直径的比率而获得的值来减去 具体布线。 将导体直径与用于调整的预定布线的长度的总和的总和确定为小于减去值的值。
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公开(公告)号：US20250102590A1
公开(公告)日：2025-03-27
申请号：US18730341
申请日：2022-10-14
Applicant: HITACHI, LTD.
Inventor： Jun TSUNODA , Yutaka UEDA , Hiroya FUJIMOTO , Eri ISOZAKI , Toru KOUNO , Ryo WAKABAYASHI
IPC: G01R31/392 , G01R31/3842 , H01M10/42 , H01M10/48
Abstract: An object of the invention is to provide a technique capable of accurately evaluating soundness of a battery without excessively depending on a degree of progress of deterioration. A battery management device according to the invention evaluates the soundness of the battery using a first voltage change amount in a first period starting from a start time point before an inflection point of a voltage curve after completion of charging and a second voltage change amount in a second period starting from a start time point before an inflection point of a voltage curve after completion of discharging (see FIG. 5).
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公开(公告)号：US20220381846A1
公开(公告)日：2022-12-01
申请号：US17762390
申请日：2020-09-14
Applicant: HITACHI, LTD.
Inventor： Emha Bayu MIFTAHULLATIF , Toru KOUNO
IPC: G01R31/392 , G01R31/3835 , G01R31/374 , G01R31/396 , H02J7/00 , H01M10/48
Abstract: An object of the present invention is to provide a battery state estimation device capable of accurately estimating a deterioration state of an entire battery system in consideration of an SOH distribution of battery cells. The battery state estimation device according to the present invention estimates an SOH of a battery cell by using a correspondence between a time derivative of an output voltage during a pause period of the battery cell and a battery temperature, and estimates a deterioration state of an entire battery system by using the SOHs of a plurality of battery cells (see FIG. 1).
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公开(公告)号：US20170170781A1
公开(公告)日：2017-06-15
申请号：US15378717
申请日：2016-12-14
Applicant: HITACHI, LTD.
Inventor： Toru KOUNO , Hideyuki SHITANISHI , Masahito TOYOSAKI , Tetsuharu OHYA , Kenichi GOKITA , Tomoharu NAKAMURA
Abstract: A diagnosis system including: a power collection unit configured to couple a plurality of photovoltaic cell arrays, each including photovoltaic cells, in parallel; a control unit; and a monitoring unit, the monitoring unit being configured to: estimate a solar radiation amount and an operating temperature of the photovoltaic cell arrays based on the current value measured by a first ammeter in the control unit and the voltage value measured by the first voltmeter in the control unit by using an expression expressing a relationship between the solar radiation amount, the operating temperature, and a number of photovoltaic cells, and an output current; correct the estimated values so as to match the current values measured by second ammeters in the power collection unit by using the expression; and calculate a theoretical current value of each of the photovoltaic cell arrays based on the corrected values by using the expression.
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公开(公告)号：US20160315584A1
公开(公告)日：2016-10-27
申请号：US15134824
申请日：2016-04-21
Applicant: Hitachi, Ltd.
Inventor： Toru KOUNO , Atsuhiko KUBO , Yuuichi NAGAYAMA , Tomoharu NAKAMURA
Abstract: The diagnostic method for a photovoltaic power system includes: a step of storing measured values of voltage and current outputted by a photovoltaic cell array, and identifying a first time period and a second time period with a lower solar radiation amount than in the first time period; a step of calculating the number of faulty photovoltaic cells on the basis of the measured values in the first time period; a step of calculating the number of faulty photovoltaic cells on the basis of the measured values in the second time period; and a step of comparing the number of faulty photovoltaic cells as calculated for the first time period, and the number of faulty photovoltaic cells as calculated for the second time period, and identifying a series resistance of the photovoltaic cells and a value indicating a degree of loss resulting from a fault in the photovoltaic cells.
Abstract translation: 光伏电力系统的诊断方法包括：存储由光伏电池阵列输出的电压和电流的测量值的步骤，以及以比第一时间段内的太阳辐射量低的第一时间段和第二时间段 ; 基于第一时间段中的测量值来计算故障光伏电池的数量的步骤; 基于第二时间段中的测量值来计算故障光伏电池的数量的步骤; 以及比较第一时间段计算的故障光伏电池的数量和第二时间段计算出的故障光伏电池的数量的步骤，以及识别光伏电池的串联电阻和表示光伏电池的程度的值 光伏电池故障造成的损失。
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