WO2015115087A1 - 蓄電システム - Google Patents
蓄電システム Download PDFInfo
- Publication number
- WO2015115087A1 WO2015115087A1 PCT/JP2015/000342 JP2015000342W WO2015115087A1 WO 2015115087 A1 WO2015115087 A1 WO 2015115087A1 JP 2015000342 W JP2015000342 W JP 2015000342W WO 2015115087 A1 WO2015115087 A1 WO 2015115087A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- storage system
- power storage
- battery
- battery pack
- energy density
- Prior art date
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Classifications
-
- 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
- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- 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
- H01M10/443—Methods for charging or discharging in response to temperature
-
- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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 power storage system.
- non-aqueous electrolyte secondary batteries particularly lithium secondary batteries, are expected because they have a high voltage and a high energy density.
- the energy storage system In order to make it possible to use various devices for a long time and install them in a small space in response to the recent expansion of the electricity storage market, the energy storage system is required to have a higher energy density. As the energy density increases, new countermeasures against resistance increase and heat generation are required.
- An object of the present invention is to provide a power storage system that suppresses deterioration of cycle characteristics.
- the present invention is a power storage system equipped with a battery pack, the energy density is 35 Wh / L or more, and constant current charging with a current value of 0.2 It or less is completed from the beginning of charging. It is characterized by continuing to.
- the time when the power storage system starts charging is the initial charging time, and the time when the charging reaches the set voltage and completes charging is the charging completion time.
- FIG. 1 shows the relationship between the electrical storage system concerning one Embodiment of this invention, and the charge rate and heat-generation rate of the conventional electrical storage system.
- Schematic of the electrical storage system concerning one Embodiment of this invention Sectional drawing of the battery concerning one Embodiment of this invention.
- the present invention is a power storage system equipped with a battery pack, wherein the energy density is 35 Wh / L or more, and constant current charging with a current value of 0.2 It or less is continuously performed from the initial charging stage to the completion of charging. Thus, deterioration of the cycle characteristics of the power storage system can be suppressed.
- the energy density of the battery pack installed in the power storage system is 300 Wh / L or more, the ratio of the battery pack in the system increases, and the temperature of the power storage system easily rises with respect to the heat generated by each battery. Therefore, it is preferable in that the deterioration suppressing effect of the present invention becomes remarkable.
- the reaction area of the electrode plate of the battery tends to be small in the same material system, and the resistance increases and the joule becomes high. Since heat rises, the heat generation density per unit volume of the power storage system itself increases at an accelerated rate, and the temperature of the power storage system also rises, which is preferable in that the deterioration suppressing effect of the present invention becomes remarkable.
- the heat capacity of the entire power storage system is 30000 J / K or less because the temperature of the power storage system is likely to rise with respect to the heat generated by each battery, so that the deterioration suppressing effect of the present invention becomes remarkable.
- the power storage system includes at least one battery pack and a converter that is electrically connected to the battery pack.
- the battery pack 9 includes a battery, a frame for holding the battery, and a current collector plate.
- a plurality of batteries are connected in series or in parallel in a battery pack.
- the power storage system includes an inverter 14, a converter 13, a detection unit 12, and an exterior body in addition to the battery pack 9.
- the exterior body may be made of iron, aluminum, copper, resin, etc., and the main component may be resin.
- the battery includes a positive electrode active material, a negative electrode active material, and a separator.
- a lithium-containing composite oxide or the like is used for the positive electrode active material
- graphite or the like is used for the negative electrode active material
- polypropylene and polyethylene are used for the separator.
- increasing the design capacity increases the active material weight per unit area and reduces the proportion of separators and current collectors that do not contribute to the reaction. The area is reduced and the resistance is increased.
- Example 1 Production of negative electrode 100 parts by weight of graphite as a negative electrode active material and 1 part by weight of styrene butadiene rubber as a binder were mixed in water to obtain a slurry. This slurry was applied to both sides of a negative electrode current collector made of copper and then dried. Next, the negative electrode current collector with the slurry dried on both sides was rolled and cut into a length of 700 mm and a width of 60 mm to obtain the negative electrode 6.
- non-aqueous electrolyte As a non-aqueous solvent, ethylene carbonate, ethyl methyl carbonate, and dimethyl carbonate were mixed at a volume ratio of 1: 1: 1, and the concentration was 1.4 mol / m 3. LiPF 6 was dissolved so that 5% vinylene carbonate was added as an additive to obtain a non-aqueous electrolyte.
- an upper insulating plate 8a and a lower insulating plate 8b are arranged on the upper and lower portions of the electrode plate group, the negative electrode lead 6a is welded to the battery case 1, and the positive electrode lead 5a is attached to the sealing plate 2 having an internal pressure-operated safety valve. It was welded and stored inside the battery case 1.
- the battery was completed by injecting a non-aqueous electrolyte into the battery case 1 by a decompression method and caulking the opening end of the battery case 1 to the sealing plate 2 via the gasket 3.
- 18650 size (diameter: 18 mm, height: 65 mm) was used.
- the battery was designed by adjusting the amount of active material so that the energy density of the battery was 300 Wh / L, 400 Wh / L, and 500 Wh / L.
- the battery pack was designed by adjusting the battery ratio in the battery pack so that the energy density of the battery pack was three types of 100 Wh / L, 200 Wh / L, and 300 Wh / L.
- the energy density of the power storage system was designed by adjusting the in-system battery pack ratio so that the energy density was 3 types of 25 Wh / L, 30 Wh / L, and 35 Wh / L.
- the charge current value was 0.2 It and constant current charge up to the upper limit voltage of 4.2 V was performed.
- the discharge current value was 0.3 It and the discharge end voltage was 3.0 V, and constant current discharge was performed (hereinafter referred to as “0 .2 It constant current ”).
- constant current charging was performed with a charging current value of 0.5 It and up to an upper limit voltage of 4.2 V, a discharging current value of 0.3 It and a discharge end voltage of 3.0 V, and constant current discharging was performed (hereinafter, "Indicated as” 0.5 It constant current ").
- the charging current value is set to 0.2 It, and constant current charging is performed up to the upper limit voltage of 4.2 V. Thereafter, constant voltage charging is performed to the termination current of 50 mA, the discharging current value is 0.3 It, and the discharging termination voltage is 3. Constant current discharge was performed at 0 V (hereinafter referred to as “0.2 It constant current constant voltage”).
- Example 2 A power storage system of 35 Wh / L was fabricated using battery packs with energy densities of 100 Wh / L, 200 Wh / L, and 300 Wh / L, and cycle characteristics were measured in the same manner as in Example 1. The obtained results are shown in Table 2.
- Example 3 A battery pack having a energy density of 300 Wh / L, 400 Wh / L, and 500 Wh / L is used to produce a battery pack of 400 Wh / L, and a power storage system is produced using the battery pack. Was measured. The obtained results are shown in Table 3.
- Example 4 Three types of power storage systems with heat capacities of 30000 J / K, 40000 J / K, and 50000 J / K were produced using a battery pack with an energy density of 300 Wh / L, and the cycle characteristics were measured in the same manner as in Example 1. Table 4 shows the obtained results.
- the cycle maintenance rate was high in any power storage system with constant current charge of 0.2 It, whereas energy was constant with constant current charge of 0.5 It and constant current and constant voltage of 0.2 It.
- the cycle retention rate in the power storage system with a density of 35 Wh / L was low. This is considered to be because the heat generation density per unit volume was high in the 35 Wh / L power storage system, and the temperature of the battery pack or the battery in the battery pack was high, resulting in deterioration.
- the cycle maintenance rate was high in any power storage system with constant current charge of 0.2 It, whereas the battery was fixed with constant current charge of 0.5 It and constant current and constant voltage of 0.2 It.
- the cycle retention rate was low. This is considered to be because the battery pack energy density is 300 Wh / L, the heat generation density per unit volume is high, and the temperature of the battery pack or the battery in the battery pack is high, causing deterioration.
- the constant current charge of 0.2 It has a lower cycle maintenance rate than the constant current charge of 0.5 It and the constant current constant voltage of 0.2 It. There were few. From these results, even in a situation where the heat generation density of the power storage system increases due to the difference in the configuration conditions of the power storage system, by using constant current charging with a low current value (0.2 It or less) as in the present invention, It was found that there was no deterioration of cycle characteristics and that the longevity of the power storage system could be achieved.
- a cylindrical battery is used, but the same effect can be obtained by using a battery having a square shape.
- the power storage system using the charging method of the present invention has excellent cycle characteristics, and is useful as a power source for household power supplies, industrial large-scale power storage for base stations and factories.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Battery Mounting, Suspending (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
(1)負極の作製
負極活物質として100重量部の黒鉛と、結着剤として1重量部のスチレンブタジエンゴムとを、水に混合し、スラリーを得た。このスラリーを、銅からなる負極集電体の両面に塗布した後、乾燥させた。次に、両面にスラリーが乾燥された負極集電体を圧延し、長さ700mm、幅60mmに裁断して、負極6を得た。
まず、正極活物質として100重量部のニッケル酸リチウムと、導電剤として1重量部のアセチレンブラックと、結着剤として3重量部のポリフッ化ビニリデン(PVDF)とを、N-メチルピロリドン(NMP)に混合し、正極合剤スラリーを得た。この正極合剤スラリーを、アルミニウムからなる正極集電体の両面に塗布した後、乾燥させた。次に、両面に正極合剤スラリーが塗布して乾燥された正極集電体を圧延し、長さ600mm、幅59mmに裁断して、正極5を得た。
非水溶媒としてエチレンカーボネートとエチルメチルカーボネートとジメチルカーボネートとを体積比が1:1:1となるように混合した混合溶媒に、濃度が1.4mol/m3になるようにLiPF6を溶解し、添加剤としてビニレンカーボネートを5%加え、非水電解液を得た。
まず、所定の正極5と負極6のそれぞれの集電体に、アルミニウム製の正極リード5aおよびニッケル製の負極リード6aを取り付けた後、正極5と負極6とをセパレータ7を介して捲回し、極板群を構成した。
エネルギー密度が300Wh/Lの電池パックを用いて作製した25Wh/L、30Wh/L、35Wh/Lの蓄電システムを用いて、サイクル特性について測定した。
ここで、蓄電システムの充放電を以下の3つの方法に分けて行った。
エネルギー密度が100Wh/L、200Wh/L、300Wh/Lの電池パックを用いて35Wh/Lの蓄電システムを作製し、実施例1と同様にしてサイクル特性について測定した。得られた結果を表2に示す。
エネルギー密度が300Wh/L、400Wh/L、500Wh/Lの電池を用いて400Wh/Lの電池パックを作製し、その電池パックを用いて蓄電システムを作製し、実施例1と同様にしてサイクル特性について測定した。得られた結果を表3に示す。
エネルギー密度が300Wh/Lの電池パックを用いて、熱容量が30000J/K、40000J/K、50000J/Kの3種類の蓄電システムを作製し、実施例1と同様にしてサイクル特性について測定した。得られた結果を表4に示す。
2 封口板
3 ガスケット
5 正極
5a 正極リード
6 負極
6a 負極リード
7 セパレータ
8a 上部絶縁板
8b 下部絶縁板
9 電池パック
10 充放電制御部
11 状態検出部
12 検出部
13 コンバータ
14 インバータ
15 電源切替部
16 記憶部
17 負荷
18 蓄電システム
Claims (4)
- 電池パックを搭載した蓄電システムであって、
エネルギー密度が35Wh/L以上であり、
0.2It以下の電流値による定電流充電を充電初期から充電完了まで継続して行う蓄電システム。 - 前記電池パックのエネルギー密度が300Wh/L以上である請求項1に記載の蓄電システム。
- 前記電池パックに収容された電池のエネルギー密度が500Wh/L以上である請求項1または2に記載の蓄電システム。
- 熱容量が30000J/K以下である請求項1~3のいずれかに記載の蓄電システム。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015559818A JPWO2015115087A1 (ja) | 2014-01-31 | 2015-01-27 | 蓄電システム |
CN201580006591.6A CN105940546A (zh) | 2014-01-31 | 2015-01-27 | 蓄电*** |
US15/112,896 US20170005484A1 (en) | 2014-01-31 | 2015-01-27 | Power storage system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2014016564 | 2014-01-31 | ||
JP2014-016564 | 2014-01-31 |
Publications (1)
Publication Number | Publication Date |
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WO2015115087A1 true WO2015115087A1 (ja) | 2015-08-06 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2015/000342 WO2015115087A1 (ja) | 2014-01-31 | 2015-01-27 | 蓄電システム |
Country Status (4)
Country | Link |
---|---|
US (1) | US20170005484A1 (ja) |
JP (1) | JPWO2015115087A1 (ja) |
CN (1) | CN105940546A (ja) |
WO (1) | WO2015115087A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005285633A (ja) * | 2004-03-30 | 2005-10-13 | Osaka Gas Co Ltd | 非水系二次電池及びその充電方法 |
WO2011068154A1 (ja) * | 2009-12-04 | 2011-06-09 | 三洋電機株式会社 | 蓄電ユニット、発電システムおよび充放電システム |
WO2011096032A1 (ja) * | 2010-02-03 | 2011-08-11 | パナソニック株式会社 | 電源装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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US4207513A (en) * | 1978-02-10 | 1980-06-10 | Power Control Corporation | Automatic battery charger |
US20050194933A1 (en) * | 2004-03-02 | 2005-09-08 | Arnold Edward H. | Method of charging a battery |
US7399554B2 (en) * | 2005-03-17 | 2008-07-15 | Kejha Joseph B | Hybrid rechargeable battery having high power and high energy density lithium cells |
WO2006113924A2 (en) * | 2005-04-20 | 2006-10-26 | A123 Systems, Inc. | Safer high energy battery |
US20080191667A1 (en) * | 2007-02-12 | 2008-08-14 | Fyrestorm, Inc. | Method for charging a battery using a constant current adapted to provide a constant rate of change of open circuit battery voltage |
US20100026240A1 (en) * | 2008-07-30 | 2010-02-04 | 3M Innovative Properties Company | Lithium ion battery pack charging system and device including the same |
US20110037439A1 (en) * | 2009-08-17 | 2011-02-17 | Apple Inc. | Increasing energy density in rechargeable lithium battery cells |
EP2637246B1 (en) * | 2010-11-05 | 2019-08-14 | Mitsubishi Electric Corporation | Charging/discharging device and method for controlling charging and discharging |
-
2015
- 2015-01-27 JP JP2015559818A patent/JPWO2015115087A1/ja active Pending
- 2015-01-27 US US15/112,896 patent/US20170005484A1/en not_active Abandoned
- 2015-01-27 CN CN201580006591.6A patent/CN105940546A/zh active Pending
- 2015-01-27 WO PCT/JP2015/000342 patent/WO2015115087A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005285633A (ja) * | 2004-03-30 | 2005-10-13 | Osaka Gas Co Ltd | 非水系二次電池及びその充電方法 |
WO2011068154A1 (ja) * | 2009-12-04 | 2011-06-09 | 三洋電機株式会社 | 蓄電ユニット、発電システムおよび充放電システム |
WO2011096032A1 (ja) * | 2010-02-03 | 2011-08-11 | パナソニック株式会社 | 電源装置 |
Also Published As
Publication number | Publication date |
---|---|
US20170005484A1 (en) | 2017-01-05 |
JPWO2015115087A1 (ja) | 2017-03-23 |
CN105940546A (zh) | 2016-09-14 |
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