WO2015178077A1 - Système d'accumulation de données et dispositif de stockage d'énergie - Google Patents

Système d'accumulation de données et dispositif de stockage d'énergie Download PDF

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Publication number
WO2015178077A1
WO2015178077A1 PCT/JP2015/057834 JP2015057834W WO2015178077A1 WO 2015178077 A1 WO2015178077 A1 WO 2015178077A1 JP 2015057834 W JP2015057834 W JP 2015057834W WO 2015178077 A1 WO2015178077 A1 WO 2015178077A1
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WO
WIPO (PCT)
Prior art keywords
storage device
power
converter
power storage
active material
Prior art date
Application number
PCT/JP2015/057834
Other languages
English (en)
Japanese (ja)
Inventor
亮仁 大和
神谷　岳
直樹 藤井
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Publication of WO2015178077A1 publication Critical patent/WO2015178077A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/251—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for stationary devices, e.g. power plant buffering or backup power supplies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a data storage system and a power storage device.
  • a power storage device including a secondary battery is connected to a power line of a computer device such as a data center server (see, for example, Patent Document 1).
  • a power storage device is connected between an AC-DC converter connected to a power source and a motherboard.
  • a data storage system including a power storage device is required to be small.
  • the main object of the present invention is to reduce the size of the data storage system.
  • the data storage system includes a data server, a power source, an AC-DC converter, and a power storage device.
  • Data is stored in the data server.
  • the power source outputs AC power to the data server side.
  • the AC-DC converter is connected between the power source and the data server.
  • the AC-DC converter converts AC power from a power source into DC power.
  • the power storage device is connected between the AC-DC converter and the data server.
  • the power storage device is connected to the AC-DC converter without passing through the DC-DC converter.
  • the secondary batteries included in the power storage device are connected in series and each includes three secondary batteries having a positive electrode containing lithium manganese oxide as a positive electrode active material and a negative electrode containing graphite as a negative electrode active material. ing.
  • the AC-DC converter preferably outputs power having a voltage in the range of 12V ⁇ 5%.
  • the power source preferably outputs a voltage of AC 100 V or more to the AC-DC converter.
  • the power storage device includes three secondary batteries.
  • the three secondary batteries are connected in series.
  • Each of the three secondary batteries has a positive electrode containing lithium manganese oxide as a positive electrode active material and a negative electrode containing graphite as a negative electrode active material.
  • the data storage system can be downsized.
  • FIG. 1 is a schematic circuit diagram of a data storage system according to an embodiment of the present invention.
  • FIG. 2 is a schematic circuit diagram of the power storage device according to the embodiment of the present invention.
  • FIG. 3 is a charge / discharge curve of a power storage device in which three secondary batteries using LiCo 1/3 Ni 1/3 Mn 1/3 O 2 as a positive electrode active material and graphite as a negative electrode active material are connected in series. is there.
  • FIG. 4 is a charge / discharge curve of a power storage device in which three secondary batteries using LiFePO 4 as a positive electrode active material and graphite as a negative electrode active material are connected in series.
  • FIG. 5 is a charge / discharge curve of a power storage device in which three secondary batteries using LiMn 2 O 4 as a positive electrode active material and graphite as a negative electrode active material are connected in series.
  • FIG. 1 is a schematic circuit diagram of a data storage system according to this embodiment.
  • a data storage system 1 shown in FIG. 1 is a system that stores and processes various electronic data in, for example, a server center such as a rental server.
  • the data storage system 1 has a data server 10. Electronic data is stored in the data server 10.
  • the data server 10 includes, for example, a calculation unit, a memory, and a hard disk.
  • the computing unit can be configured by, for example, a central processing unit (CPU).
  • the calculation unit performs various calculations and controls a memory, a hard disk, and the like.
  • the memory is connected to the calculation unit.
  • the memory temporarily stores data output from the calculation unit.
  • the hard disk is connected to the calculation unit.
  • the hard disk stores and stores data.
  • a power source 11 is connected to the data server 10.
  • the power source 11 outputs AC power to the data server 10 side.
  • the power source 11 may receive power from the outside, such as a power supply unit, or may generate power spontaneously.
  • the voltage of the AC power output from the power source 11 is preferably, for example, AC 400V or less, and more preferably AC 200V or less.
  • An AC-DC converter 12 is connected between the power source 11 and the data server 10.
  • the AC-DC converter 12 converts AC power supplied from the power source 11 into DC power.
  • the AC-DC converter 12 outputs power having a voltage in the range of 12V ⁇ 5% conforming to the ATX power supply standard.
  • a power storage device 13 is connected between the AC-DC converter 12 and the data server 10. Specifically, the AC-DC converter 12 and the data server 10 are electrically connected without passing through the power storage device 13 and are also electrically connected through the power storage device 13.
  • the data storage system 1 includes a power supply line 14a that electrically connects the AC-DC converter 12 and the data server 10 without going through the power storage device 13, and the AC-DC converter 12 and the data server 10 connected to the power storage device. 13 and a power supply line 14 b that is electrically connected via the line 13.
  • the power storage device 13 is a device that supplies DC power to the data server 10 when, for example, power supply from the power source 11 is stopped.
  • the power storage device 13 includes three secondary batteries 13a, 13b, and 13c.
  • the power storage device 13 has only three secondary batteries 13a, 13b, and 13c as secondary batteries.
  • the power storage device 13 may further include a configuration other than the secondary battery in addition to the three secondary batteries 13a, 13b, and 13c.
  • the power storage device 13 may further include, for example, a control unit for controlling the secondary batteries 13a, 13b, and 13c in addition to the three secondary batteries 13a, 13b, and 13c.
  • the three secondary batteries 13a, 13b, and 13c are connected in series. Specifically, the secondary batteries 13a, 13b, and 13c are connected in series in the power supply line 14b.
  • Secondary batteries 13a, 13b, and 13c each have a positive electrode, a negative electrode, and an electrolyte.
  • the positive electrode contains lithium manganese oxide as a positive electrode active material.
  • the positive electrode preferably contains spinel type lithium manganese oxide as the positive electrode active material.
  • the negative electrode contains graphite as a negative electrode active material.
  • the electrolyte can be composed of, for example, LiPF 6 , LiBF 4 or the like.
  • the electrolyte may be an electrolytic solution.
  • Examples of the electrolyte used preferably include a carbonate ester compound.
  • the voltage is about 4.2V.
  • the capacity of the secondary battery 13a, the capacity of the secondary battery 13b, and the capacity of the secondary battery 13c may be the same or different, but are preferably the same. If they are the same, the battery production line can be integrated into one, which is efficient. Moreover, if it is the same when assembling the power storage device, it is possible to prevent a human error due to a mistake in battery removal.
  • FIG. 3 shows a charge / discharge curve of a power storage device in which three secondary batteries using LiCo 1/3 Ni 1/3 Mn 1/3 O 2 as a positive electrode active material and graphite as a negative electrode active material are connected in series. Show. As shown in FIG.
  • this power storage device has a very narrow capacity range that can supply power in a voltage range of 12V ⁇ 5% that conforms to the ATX power supply standard. Therefore, when this power storage device is used in a data storage system, it is necessary to connect a DC-DC converter to the power storage device to transform the power. The DC-DC converter becomes hot when it is transformed. For this reason, when a DC-DC converter is provided, it is necessary to provide a cooling mechanism for the DC-DC converter. Therefore, when a power storage device using a secondary battery using nickel-manganese-cobalt composite oxide as a positive electrode active material is applied to a data storage system, a DC-DC converter and its cooling mechanism are required. Therefore, the entire data storage system is increased in size. Furthermore, the energy efficiency of the transformation in the DC-DC converter is about 90%, and about 10% of power is lost. Therefore, it is necessary to increase the capacity of the power storage device in consideration of the power loss during the transformation. Therefore, the data storage system is further increased in size.
  • FIG. 4 shows a charge / discharge curve of a power storage device in which three secondary batteries using LiFePO 4 as a positive electrode active material and graphite as a negative electrode active material are connected in series.
  • the terminal voltage is higher than the voltage in the range of 12V ⁇ 5% conforming to the ATX power supply standard in most capacity ranges. Therefore, when this power storage device is directly connected to the downstream side of the AC-DC converter that supplies DC power to the data server, it is charged only to a capacity of about 5%.
  • a power storage device having a secondary battery using lithium iron phosphate as a positive electrode active material may be connected upstream of the AC-DC converter. In that case, a sufficiently high charging voltage can be secured for charging the power storage device. However, in this case, the amount of heat generated by the data storage system increases, so the cooling mechanism needs to be enlarged. Therefore, the data storage system becomes large.
  • the power storage device 13 includes three secondary batteries 13a, 13b, and 13c having a positive electrode including lithium manganese oxide as a positive electrode active material and a negative electrode including graphite as a negative electrode active material. ing.
  • the power storage device 13 has a wide capacity range in which power with a voltage in the range of 12V ⁇ 5% conforming to the ATX power supply standard can be supplied. Therefore, in the data storage system 1, it is not always necessary to provide a DC-DC converter or its cooling mechanism. Therefore, although a secondary battery using lithium manganese oxide as a positive electrode active material having a low energy density is used, it is not always necessary to provide a DC-DC converter or a cooling mechanism thereof. Can be miniaturized.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

　L'invention vise à réduire la taille d'un système d'accumulation de données. Un système (1) d'accumulation de données est équipé d'un serveur (10) de données, d'une source d'alimentation (11), d'un convertisseur c.a./c.c. (12), et d'un dispositif (13) de stockage d'énergie. Le convertisseur c.a./c.c. (12) est connecté entre la source d'alimentation (11) et le serveur (10) de données. Le dispositif (13) de stockage d'énergie est connecté entre le convertisseur c.a./c.c. (12) et le serveur (10) de données. Le dispositif (13) de stockage d'énergie est connecté au convertisseur c.a./c.c. (12) sans qu'un convertisseur c.c./c.c. ne soit interposé entre ceux-ci. Le dispositif (13) de stockage d'énergie comprend des cellules secondaires qui sont conçues à partir de trois cellules secondaires connectées en série (13a, 13b, 13c), dont chacune possède une électrode positive contenant un oxyde de lithium et de manganèse utilisé comme matériau actif d'électrode positive et une électrode négative contenant du graphite utilisé comme matériau actif d'électrode négative.
PCT/JP2015/057834 2014-05-19 2015-03-17 Système d'accumulation de données et dispositif de stockage d'énergie WO2015178077A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014103828 2014-05-19
JP2014-103828 2014-05-19

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Publication Number Publication Date
WO2015178077A1 true WO2015178077A1 (fr) 2015-11-26

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1014013A (ja) * 1996-06-14 1998-01-16 Fuji Photo Film Co Ltd 電気自動車及びその駆動電源装置
JP2002291171A (ja) * 2001-03-23 2002-10-04 Ntt Power & Building Facilities Inc 無停電電源装置
US20080030078A1 (en) * 2006-06-01 2008-02-07 Exaflop Llc Data Center Uninterruptible Power Distribution Architecture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1014013A (ja) * 1996-06-14 1998-01-16 Fuji Photo Film Co Ltd 電気自動車及びその駆動電源装置
JP2002291171A (ja) * 2001-03-23 2002-10-04 Ntt Power & Building Facilities Inc 無停電電源装置
US20080030078A1 (en) * 2006-06-01 2008-02-07 Exaflop Llc Data Center Uninterruptible Power Distribution Architecture

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