CN108779759A - Wind power equipment and method for operating wind power equipment - Google Patents
Wind power equipment and method for operating wind power equipment Download PDFInfo
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- CN108779759A CN108779759A CN201780015554.0A CN201780015554A CN108779759A CN 108779759 A CN108779759 A CN 108779759A CN 201780015554 A CN201780015554 A CN 201780015554A CN 108779759 A CN108779759 A CN 108779759A
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 238000013461 design Methods 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims 1
- 230000005611 electricity Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010408 sweeping Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
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- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/028—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0276—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling rotor speed, e.g. variable speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0296—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor to prevent, counteract or reduce noise emissions
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The present invention relates to a kind of wind power equipment (10), it includes tower (12), rotor (16) with rotor blade (20), transmission system (23) and the generator (22) driven via transmission system (23) by rotor (16), wherein rotor (16) has the rotor region A given by root diameter D, A=π/4D2, and there is generator (22) specific nominal power P, the speed f that wherein wind power equipment (10) is suitable for when rotor (16) operates to be no more than limit fgOperation, wherein tower (12) is designed as the nominal power ratio P/A of tubular steel tower (12) and wind power equipment (10) per rotor region in 80W/m2≤P/A≤180W/m2In the range of, preferably in 100W/m2≤P/A≤160W/m2In the range of, wherein limit fgLess than the first intrinsic frequency of the wind power equipment (10).The invention further relates to a kind of methods for operating corresponding wind power equipment (10).
Description
Technical field
The present invention relates to a kind of wind power equipment, including tower, the rotor with rotor blade, transmission system, and passed through by rotor
By the generator of transmission system drives.The rotor has rotor region (sweeping area) A, wherein A given by root diameter D
=π/4D2.And the generator has specific nominal power P, wherein when the wind power equipment is suitable for the rotor operation
Speed f be no more than limit fgOperation.
Background technology
Since wind-powered electricity generation industry really industrializes since the beginning of the nineties, wind turbine generator is evolving always.
Average turbine size from the power-handling capability of 150 kilowatts (even lower) increase to 4 megawatts (land) and be higher than 8 megawatts
(sea).Root diameter increases to 140 meters (land) and 180 meters (seas) from 20 meters.The hub height of turbine is live special
Fixed, but among up to 160 meters of even higher towers are considering in applying by land.
Present turbine size and the relative dimensions of critical piece have caused to apply especially for road in production
The significant cost limited to logistics increases.The transport and installation of component become extremely difficult in project by land.It has developed
For high tower solution, the new technology of the transport device of separate blade and complexity, but the object needed for implementation or more wind-force
The influence of stream has become the pith of entire turbine cost.
Document US2013/0177418A1 describes a kind of wind turbine comprising tower, the rotor with rotor blade
With the generator driven by rotor, the rotor has rotor/sweeping area A, and the generator has specific nominal work(
Rotary speed when rate P, wherein wind power equipment are suitable for rotor operation is no more than the operation of rate limitation.
Currently, a large amount of supply wind power equipments in area that wind condition is best.The design of these installed wind power equipments
Mode makes them that can also work under high wind.Fig. 2 shows characteristic curves, indicate the size of traditional wind power equipment.
In order to the area (hereinafter referred to " low wind area ") for using wind-force smaller, wind turbine so far
Size has expanded without deviating considerably from the characteristic curve.Tower height is also continuously increased so that even if in low wind area, corresponding
Wind speed is also acceptable obtained by the height above sea level of height.
In the future, the demand to suitable for low wind area wind power equipment will be increasing, should be suitable for the wind-powered electricity generation in low wind area
Equipment is profitable in these areas.
Invention content
The purpose of the present invention is to provide a kind of high performance-price ratio for low wind area, the wind power equipment of low noise, the wind
Electric equipment has operating parameter, complements each other with the wind power equipment of existing type in terms of constant reliable overall current.This
The purpose of invention, which also resides in, provides corresponding operating method.
The purpose is realized by the present invention limited in independent claims.Dependent claims detail having for the present invention
Sharp embodiment.
Multiple embodiments according to the present invention, wind power equipment (wind turbine) includes tower, the rotor with rotor blade
With the generator by rotor via transmission system drives.Speed f when the wind power equipment is suitable for rotor operation does not surpass
Cross limit fgOperation.The ratio P/A of nominal power of the wind power equipment per rotor region is in 80W/m2≤P/A≤180W/m2Model
In enclosing, preferably in 100W/m2≤P/A≤160W/m2In the range of.Absolute extremes fgLess than the first intrinsic frequency of wind power equipment
Rate (including tower, cabin and rotor in rigid base for corresponding building).Preferably, absolute extremes fgLess than building
Build the 90% of the first intrinsic frequency of object.
It reduces the potential website quantity with extraordinary wind condition and increases the permeability of wind-powered electricity generation in power grid, especially
In these areas, lead to electric power evacuation problem and the limitation to other wind power equipments.Then, Wind Power Project is moved into mean wind speed
It is relatively low and with big consumer distance shorter area.The attraction of these websites of past is smaller, but technological improvement and turbine change
It makes and actively impact is produced to cost exploitation, and make these websites that there is commercial viability.Especially consider actual items and
In the case of power grid infrastructure cost, there is technology and the quotient of the distributed wind-powered electricity generation of the optimisation technique for reducing power swing
Industry advantage is used.
The ratio P/A of the nominal power of every rotor region according to the abovementioned embodiments of the present invention is to be based on spinner velocity,
The integrated approach of nominal power and the Combination nova of tower frequency range leads to the significant lighter structure of critical piece, improves energy
Output simultaneously reduces noise emissions.
Time and wind speed are laid particular emphasis on according to the energy capture of the turbine of this new method, there is statistically higher generation
Probability.By increasing tower height, energy capture can be improved by reducing specified spinner velocity and nominal power simultaneously.It catches at higher wind speeds
The potential energy obtained is ignored.
Wind power equipment based on the specific operation and design parameter that are previously mentioned optimizes spinner velocity range and critical piece,
For example, the disturbing effect of the intrinsic frequency of tower.Which results in configuration aspects, the wind-powered electricity generation optimized in terms of production and in terms of noise emission
Equipment (turbine) concept, disclosure satisfy that the demand of low wind speed website at first blush.
With by frequency limitation fgThe wind power equipment of given maximum rotor speed allows for so-called soft rigid tower knot
Structure (the first intrinsic frequency for being higher than normal speed frequency), intrinsic frequency is less than 0.2Hz.
Therefore, by the tower that Deethanizer design is such soft rigid tower structure, i.e. tubular steel tower.Tubular steel tower is than similar coagulation
Tu Ta has more cost performance, and on the other hand, the various pieces of this tubular steel tower must transport on public way.
According to a preferred embodiment of the invention, wind power equipment include be suitable for limit rotor speed f control and/or
Regulating device (control device).It controls and/or regulates device and is configured to limitation rotor speed f in operation so that
Speed f is no more than limit fg(the first intrinsic frequency for being less than wind power equipment).
According to a further advantageous embodiment of the invention, the torque of transmission system is adjustable, to limit the rotation of rotor
Turn frequency f.
According to a further advantageous embodiment of the invention, root diameter D is in the range of 120m≤D≤150m.
According to a further advantageous embodiment of the invention, the ratio of hub height H and root diameter D 0.7≤H/D≤
In the range of 1.3, preferably in H/D ≈ 1.In the case where root diameter D is within the scope of 120m≤D≤150m, wheel hub is high
Spend H by identical range, i.e. 120m≤H≤150m.
According to a further advantageous embodiment of the invention, the ratio of torque N and speed f 9600kNms≤N/f≤
In the range of 13000kNms.The range is equivalent to 160kNm/RPM≤N/n≤217kNm/RPM's (wherein 1RPM=1/60Hz)
The range of speeds.
According to another preferred embodiment of the invention, wind power equipment is designed as land wind power equipment.
The invention further relates to a kind of method for operating wind power equipment, which includes being designed as the tower of tubular steel tower,
Rotor with rotor blade and the generator by rotor driving.There is rotor the rotor region given by root diameter D (to scan
Region) A, wherein A=π/4D2, and generator has specific nominal power P, the wherein mark of every rotor region of wind power equipment
Claim the ratio P/A of power in 80W/m2≤P/a≤180W/m2In the range of, preferably in 100W/m2≤P/A≤160W/m2's
In range, and wherein wind power equipment operates in this way so that the speed f of rotor in operation is no more than the limit
fg。
According to a preferred embodiment of the present invention, the torque of transmission system is adjusted to limit the speed f of rotor.
With reference to embodiment as described below, these and other aspects of the invention will become obvious and be illustrated.
Description of the drawings
Fig. 1 shows the schematic diagram of wind power equipment 10 according to the preferred embodiment of the invention；And
Fig. 2 shows the ratios of description wind power equipment according to the preferred embodiment of the invention and known wind power equipment or specified
The relational graph of torque/rated speed and root diameter D.
Specific implementation mode
Fig. 1 shows the schematic diagram of wind power equipment 10.Wind power equipment 10 has a tower 12, cabin 14 and with shaft 18 and more
The rotor 16 of a (generally three) rotor blade 20, wherein being only shown in FIG. 1 there are two rotor blade.Rotor blade 20
Adjustable blade burner section.Blade angle is also commonly referred to as pitch angle.It adjusts and is usually executed by electronic or hydraulic motor, i.e., it is each to turn
20 at least one motor of blades, is not shown in Fig. 1.Two or more horses can also be arranged in each rotor blade 20
It reaches, with regulation blade angle.The adjusting of blade angle 20 by rotor blade 20 for most preferably being shunted by wind power plant
Wind provide power.In addition, adjustment of blade angle is for reducing power consumption and therefore reducing wind in case of elevated wind speeds
The load of electric equipment 10.
Wind-force is converted into the rotation of rotor 16 by rotor blade.Generator 22 is by rotor 16 via including gear-box 24
Transmission system 23 drives, which is transmitted to the electrical connection of 12 (not shown) bottom of tower via power cable, and power cable is logical
Cross the power supply of tower 12.High pressure conversion is happened at this, and is then that power grid is powered.Tower 12 is the tubular steel tower building on pedestal 26
12.Tubular steel tower 12 is made of many tubular elements (being not explicitly shown).In upper area, tower 12 carries cabin 14, the machine
Cabin 14 has corresponding set parts.It does not include gear-box 24 that wind power equipment 10, which may be set to be,.In addition, rotor brake
(not shown) is usually also disposed on the fast axis between gear-box 24 and generator 22.
Generator 22 has the specific nominal power P of about 2MW.Control device is additionally provided in cabin 14 (not show
Go out), which adjusts and/or control wind power equipment 10.Control device (especially) is suitable for the speed f limits of rotor 16
It is made as absolute extremes fg.Absolute extremes fgSignificantly lower than wind power equipment 10 (tower includes cabin and rotor in rigid base)
First intrinsic frequency.Control device adjusts the corner of rotor blade, to limit the speed f of the rotor blade 20.
The hub height H (rotor 20 is on ground 28) that wind power equipment 10 shown in Fig. 1 has and root diameter D parties
Ratio is about H/D ≈ 1.In the example shown, hub height H and root diameter D are each about 140m.
Rotor 16 has the rotor region/sweeping area A, wherein A=π/4D given by root diameter D2.Wind power equipment 10
The ratio P/A of (the generator 22) nominal power of (rotor 16) per rotor region is about 130W/m2, in 100W/m2≤P/
A≤160W/m2In the range of.The ratio P/A of the nominal power of every rotor region of the wind power equipment of " prior art " is substantially
Higher.
The major design driving factors of power conversion system are the specified mechanical torques that (a) is generated by the rotor of turbine.
If transmission system includes high speed or middle speed generator, gearbox and power conversion system or the direct drive with ring generator
Dynamic system and power conversion system and (b) specified speed f or rotor speed, then this is independent.
Therefore, the increasing of the normal speed of nominal torque or rotor is caused for the increase of the rated power of wind power equipment 10
Add, or both increase.
Due to tip speed of the noise emission essentially from rotor blade 20 to designing vital wind power equipment 10,
Therefore nowadays the maximum tip speed of the modern wind turbine of more MW sizes is limited between 74m/s to 80m/s range.Cause
This, when tip speed needs to be maintained under the limit, the increase of root diameter D leads to the reduction of spinner velocity.If
Plan keeps specified turbine output constant, then the nominal torque of transmission system 23 must with the increase of root diameter D substantially at
Increase to ratio.
If rated power needs to increase to realize desired performance objective, nominal torque other than root diameter D
It must further increase.Since rated power is also proportional to nominal torque, the increasing of total nominal torque of transmission system 23
Long " root diameter is multiplied by rated power output " proportional, specified driveline torque=f (rated power, volume to turbine
Constant speed degree, root diameter).
The major design driving factors of tower 12 (especially tubular steel tower) include：
(a) in extreme and tired structural loads：Wind condition, rotor air dynamics and entire wind power equipment
Relationship between 10 dynamic characteristic is complicated, especially as the design of various driving load conditions and other
All it must take into account.However, it is possible to it is assumed that before starting for the practical pitching activity of power extraction, the change of pitch control
The design of most of driving wind conditions of fast wind turbine is happened in the range of rated wind speed.Another principal element is
Ensure rotor size and aerodynamics.Based on these hypothesis, it is assumed that driving tower thrust, load the design of tower structure substantially with turn
Subregion and (when turbine reaches nominal power) rated wind speed it is square proportional.
(b) transportation clearance of land Tower System：The Tower System of most cost performance is the design of tubular steel tower.Tower section is on the way
Transport be limited to itself maximum weight and maximum gauge (being usually 4.3m to 4.4m).
(c) intrinsic frequency of tower 12：Tower frequency has significant impact to turbine power.In order to avoid tower dynamics and whirlpool
The interference of the velocity interval of turbine, the target of Deethanizer design are that have to consolidate higher than the first of driving frequency except specified spinner velocity
There is the rigid structure of frequency.As described above, the transport of tower section is limited to full-size/diameter.When considering higher tower, it is necessary to
In view of these limitations (the first minimum intrinsic frequency and maximum tower bottom diameter).This causes maximum tower height degree (mainly to be managed
Shape head tower) depend on turbine operating parameter：Maximum tower height degree=f (wind speed, root diameter, specified spinner velocity).
Hereinafter, referring again to two main features of wind power equipment 10：
Wind power equipment 10, which has, allows for intrinsic frequency less than so-called soft rigid tower structure (the first intrinsic frequencies of 0.2Hz
Higher than normal speed frequency) maximum rotor speed；With
Wind power equipment 10 has limited rated power, reaches rated power at low wind speeds, it is intended to protect structural loads
It holds in the tubular steel tower (maximum gauge of tubular segments is less than 4 or 5m) for allowing that there is standard transport size, intrinsic frequency is less than
0.2Hz, and in the level of design of the hub height more than 110m.
Fig. 2 shows describe according to the wind power equipment 10 of one embodiment and the ratio of known wind power equipment or specified torsion
The relational graph of square/rated speed and root diameter D.
The ratio sustainable growth of nominal torque and normal speed since introducing 1.5MW grades (curves 30), because of maximum point
The limitation of end speed needs a large amount of growths of driveline torque to be combined to realize that higher power output increases with rotor.
Wind power equipment 10 will lower than market average (region 32) about 40%.
Although having carried out detailed displaying and description, such displaying to the present invention in the drawings and the preceding description
It should be considered as with description illustrative or exemplary and not restrictive；The present invention is not limited to the disclosed embodiments.
It is appreciated that those skilled in the art, when putting into practice invention content claimed, by studying attached drawing, institute is public
It opens content and appended claims and realizes other modifications it should also be appreciated that being content disclosed in this invention.In claim
In, term " comprising " is not excluded for other elements or step, and indefinite article "a" or "an" be also not excluded for it is multiple.Although not
With different features has been recited in mutually different dependent, do not indicate that these features cannot be combined.It is any in claim
Reference numeral is not necessarily to be construed as limitation range.
Reference numerals list：
10 wind power equipments
12 towers
14 cabins
16 rotors
18 shafts
20 rotor blades
22 generators
23 transmission systems
24 gear-boxes
26 pedestals
28 ground
30 curves
32 regions
Claims (8)
1. a kind of wind power equipment (10), including tower (12), the rotor (16) with rotor blade (20), transmission system (23) and by
The generator (22) that the rotor (16) drives via the transmission system (23), wherein the rotor (16) is with straight by rotor
Rotor region A, wherein A=π/4D given diameter D2, and the generator (22) has specific nominal power P, wherein institute
It states speed f of the wind power equipment (10) suitable for the rotor (16) operation when and is no more than limit fgOperation, wherein described
Tower (12) is designed as tubular steel tower (12) and the ratio P/A of nominal power of the wind power equipment (10) per rotor region is in 80W/
m2≤P/A≤180W/m2In the range of, preferably in 100W/m2≤P/A≤160W/m2In the range of, wherein the limit fgIt is low
In the first intrinsic frequency of the wind power equipment (10).
2. wind power equipment according to claim 1, which is characterized in that the torque of the transmission system (23) is adjustable
, to limit the speed f of the rotor (16).
3. wind power equipment according to claim 1 or 2, which is characterized in that the root diameter D of the rotor (20) is in 120m
In the range of≤D≤150m.
4. wind power equipment according to any one of claim 1 to 3, which is characterized in that the wheel hub of the rotor (20) is high
The ratio of H and root diameter D is spent in the range of 0.7≤H/D≤1.3, preferably H/D ≈ 1.
5. wind power equipment according to any one of claim 1 to 4, which is characterized in that the ratio of torque N and speed f
Rate is in the range of 9600kNms≤N/f≤13000kNms.
6. wind power equipment according to any one of claim 1 to 5, which is characterized in that wind power equipment (10) design
For land wind power equipment.
7. method of the one kind for operating wind power equipment (10), which includes being designed as the tower (12) of tubular steel tower, has and turns
The rotor (16) of blades (20) and the generator (22) driven by the rotor (16), the rotor (16) have straight by rotor
Rotor region A, wherein A=π/4D given diameter D2, and the generator (22) has specific nominal power P, wherein described
The ratio P/A of nominal power of the wind power equipment (10) per rotor region is in 80W/m2≤P/A≤180W/m2In the range of, preferably exist
100W/m2≤P/A≤160W/m2In the range of, and the wherein described wind power equipment (10) operates in this way so that it is described
Speed f when rotor (16) operates is no more than frequency limitation fg, frequency limitation fgFirst less than the wind power equipment is solid
There is frequency.
8. the method according to the description of claim 7 is characterized in that it is described to limit to adjust the torque of the transmission system (23)
The speed f of the rotor blade of rotor (16).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016106512.9 | 2016-04-08 | ||
| DE102016106512 | 2016-04-08 | ||
| PCT/EP2017/058037 WO2017174612A1 (en) | 2016-04-08 | 2017-04-04 | Wind power installation and method for operating a wind power installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108779759A true CN108779759A (en) | 2018-11-09 |
Family
ID=58503586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780015554.0A Pending CN108779759A (en) | 2016-04-08 | 2017-04-04 | Wind power equipment and method for operating wind power equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108779759A (en) |
| WO (1) | WO2017174612A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439747B (en) * | 2019-08-02 | 2020-08-11 | 明阳智慧能源集团股份公司 | IPC control method for reducing vibration and load of wind power tower in left and right directions |
| CN113090471B (en) * | 2019-12-23 | 2022-10-14 | 新疆金风科技股份有限公司 | Tower clearance audio monitoring system, method and device of wind generating set |
| WO2023008431A1 (en) | 2021-07-29 | 2023-02-02 | パナソニックＩｐマネジメント株式会社 | Secondary-battery positive electrode, method for producing same, and secondary battery |
| CN117716529A (en) | 2021-07-29 | 2024-03-15 | 松下知识产权经营株式会社 | Positive electrode for secondary battery, method for producing same, and secondary battery |
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| Title |
|---|
| GAMESA: "Technological evolution", 《GAMESA:"TECHNOLOGICAL EVOLUTION"》 * |
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| WO2017174612A1 (en) | 2017-10-12 |
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