CN112873895B - Method for manufacturing carbon fiber composite material prefabricated body for fuel cell hydrogen energy automobile - Google Patents
Method for manufacturing carbon fiber composite material prefabricated body for fuel cell hydrogen energy automobile Download PDFInfo
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- CN112873895B CN112873895B CN202011396013.7A CN202011396013A CN112873895B CN 112873895 B CN112873895 B CN 112873895B CN 202011396013 A CN202011396013 A CN 202011396013A CN 112873895 B CN112873895 B CN 112873895B
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- layer
- carbon fiber
- fuel cell
- energy automobile
- hydrogen energy
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 32
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 32
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 239000000446 fuel Substances 0.000 title claims abstract description 21
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 21
- 239000001257 hydrogen Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 47
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 45
- 239000003292 glue Substances 0.000 claims abstract description 8
- 238000007493 shaping process Methods 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 61
- 239000004744 fabric Substances 0.000 claims description 18
- 239000002356 single layer Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 230000002787 reinforcement Effects 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000007731 hot pressing Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims description 3
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Abstract
The invention discloses a method for manufacturing a carbon fiber composite material preform for a fuel cell hydrogen energy automobile, which specifically comprises the following steps: s1, core body glue pressing; s2, shaping the core body; s3, preparing graphene; s4, stacking and applying graphene; s5, graphene hot press curing and S6, and local area strengthening. According to the manufacturing method of the carbon fiber composite material prefabricated body for the hydrogen energy automobile of the fuel cell, the double-layer graphene thin layer is added in the production process of the prefabricated body, the upper limit value of the pressure bearing of the prefabricated body is greatly enhanced under the condition that the volume of the prefabricated body is not increased, so that the rigidity of the prefabricated body is improved, the embrittlement of the prefabricated body is avoided, the functional failure is avoided, the double-layer graphene thin layer has the heat conduction characteristic, heat can be quickly transferred when the prefabricated body is used, heat dissipation is conveniently avoided, and the overheat of accessories caused by rapid temperature rise is greatly prolonged, so that the service life of the product, namely the safety performance is greatly improved.
Description
Technical Field
The invention relates to the technical field of fuel cell hydrogen energy automobiles, in particular to a method for manufacturing a carbon fiber composite material prefabricated body for a fuel cell hydrogen energy automobile.
Background
The composite material is a new material which is formed by optimally combining material components with different properties by using an advanced material preparation technology, and the matrix material of the composite material is divided into two main types of metal and nonmetal. The metal matrix is commonly used as aluminum, magnesium, copper, titanium and alloys thereof. The nonmetallic substrate mainly comprises synthetic resin, rubber, ceramic, graphite, carbon and the like. The reinforced material mainly comprises glass fiber, carbon fiber, boron fiber, aramid fiber, silicon carbide fiber, asbestos fiber and whisker, wherein the composite material using carbon fiber as the reinforced material is widely used for a brake disc or a brake disc in a fuel cell hydrogen energy automobile, has extremely high applicability and thermal stability, generally needs to take a long time to lay in the production and manufacturing process of the composite material, and can greatly reduce the laying time and improve the production efficiency of the composite material by making the prefabricated body in advance.
The existing composite material using carbon fiber as a reinforcing material has brittle characteristics, so that the problem that the brake disc or sheet manufactured by the composite material is easy to generate non-friction damage and functional failure during use is caused by the brittle characteristics, and the service life and the safety and reliability of the composite material are severely limited.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for manufacturing a carbon fiber composite material prefabricated body for a fuel cell hydrogen energy automobile, which solves the problems that the prior composite material taking carbon fiber as a reinforcing material has brittle characteristics, and the brittle characteristics cause non-friction damage and functional failure easily to occur when a brake disc or a brake disc manufactured by the composite material is used, and the service life and the safety and the reliability of the composite material are seriously limited.
In order to achieve the above purpose, the invention is realized by the following technical scheme: a method for manufacturing a carbon fiber composite material prefabricated body for a fuel cell hydrogen energy automobile comprises the following operation steps:
s1, core body glue pressing: coating the dipping glue on two sides of the multi-layer cloth, forming the multi-layer coating dipping glue into waves, stacking the multi-layer wave-shaped cloth layer by layer, forming the multi-layer wave-shaped cloth into a honeycomb plate shape in a hot pressing solidification mode, and cutting the multi-layer wave-shaped cloth into honeycomb strips for standby.
S2, shaping a core:
shaping the honeycomb strip in the step S1;
s3, graphene preparation:
preparing a single-layer graphene thin layer material;
s4, stacking and pasting graphene:
placing the single-layer graphene thin layer prepared in the step S3 on two sides of the honeycomb strip molded in the step S2;
s5, graphene hot press curing:
placing the formed honeycomb strip with the graphene thin layer attached in the step S4 into a mould for hot press curing, and performing extrusion reinforcement through compression molding equipment while performing hot press curing to obtain a preform;
s6, local area reinforcement:
and (5) paving one or more carbon fiber felts with graphene thin layers on the single-side surfaces at weak parts of the surfaces of the prefabricated body after extrusion processing in the step (S5), and carrying out hot pressing reinforcement again.
Further, in the step S1, the fabric is a non-dewaxed alkali-free plain fabric, and the impregnating adhesive is an epoxy resin adhesive solution or a polyvinyl acetal.
Further, in the step S2, the honeycomb strip is formed by placing it into a forming mold, and heating the honeycomb strip by the forming mold for a certain period of time.
Further, in the step S3, the single-layer graphene thin-layer material is obtained by using friction and relative movement between the object and the graphene through a mechanical peeling method.
Further, the single-layer graphene thin layer obtained in the step S4 is attached to two sides of the formed honeycomb strip, and each side of the operation is repeated twice, so that two single-layer graphene thin layer materials are attached to the surface of each side of the honeycomb strip, and a double-layer graphene thin layer is obtained.
Further, in the step S6, the thickness of the single-layer carbon fiber felt is 0.8-1.2 mm.
Further, in the step S6, the number of layers of the carbon fiber felt is 1-3.
The invention provides a method for manufacturing a carbon fiber composite material preform for a fuel cell hydrogen energy automobile, which has the following beneficial effects:
according to the manufacturing method of the carbon fiber composite material prefabricated body for the fuel cell hydrogen energy automobile, the double-layer graphene thin layer is added in the production process of the prefabricated body, the upper limit value of the pressure bearing of the prefabricated body is greatly enhanced under the condition that the volume of the prefabricated body is not increased, and experiments prove that the arrangement of the double-layer graphene thin layer can resist the impact force generated when a common bullet shoots, so that the hardness of the prefabricated body is improved, the embrittlement of the prefabricated body is avoided, the functional failure is avoided, the double-layer graphene thin layer has the heat conduction characteristic, the heat emission can be realized by quickly transferring heat during use, the overheat of accessories caused by the rapid temperature rise is avoided, and the service life of a product, namely the safety performance is greatly improved.
Drawings
Fig. 1 is a flowchart of a method for manufacturing a carbon fiber composite preform for a fuel cell hydrogen energy automobile according to the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments.
The invention provides a technical scheme that: a method for manufacturing a carbon fiber composite material prefabricated body for a fuel cell hydrogen energy automobile comprises the following operation steps:
s1, core body glue pressing:
coating impregnating adhesive on two sides of a multi-layer cloth, forming the multi-layer coated impregnating adhesive into waves, stacking the multi-layer waved cloth layer by layer, forming the multi-layer waved cloth into a honeycomb plate shape in a hot-press solidification mode, and cutting the multi-layer waved cloth into honeycomb strips for standby; the cloth is preferably non-dewaxed alkali-free plain cloth, and the impregnating adhesive is preferably epoxy resin glue solution or polyvinyl acetal.
S2, shaping a core:
and (2) putting the honeycomb strip in the step (S1) into a forming die, wherein a heating device is arranged in the forming die, and heating the honeycomb strip through the heating device in the forming die, so that the honeycomb strip in the forming die is subjected to high-temperature heat treatment and kept for a period of time, the high-temperature heat treatment condition is 1600-1900 ℃, and the keeping time is 1-2h.
S3, graphene preparation:
the single-layer graphene thin layer material is obtained by utilizing friction and relative movement between an object and graphene through a mechanical stripping method, and is composed of a layer of carbon atoms which are periodically and closely piled in a benzene ring structure (namely a hexagonal honeycomb structure).
S4, stacking and pasting graphene:
and (3) attaching the single-layer graphene thin layer prepared in the step (S3) to the two surfaces of the honeycomb strip formed in the step (S2), and repeating the operation twice on each surface, so that two single-layer graphene thin layer materials are attached to the surface of each surface of the honeycomb strip, and a double-layer graphene thin layer is obtained.
S5, graphene hot press curing:
placing the formed honeycomb strip with the graphene thin layer attached in the step S4 into a mould for hot press curing, and performing extrusion reinforcement through compression molding equipment while performing hot press curing to obtain a preform; the hot press curing condition is that the temperature is controlled between 1200 ℃ and 1600 ℃ and the time is 1 h to 1.8h, and the pressure applied during extrusion of compression molding equipment is 2000N to 15000N.
S6, local area reinforcement:
and (3) paving 1-3 carbon fiber mats with graphene thin layers on the single-side surfaces on the weak parts of the surfaces of the prefabricated bodies after extrusion processing in the step (S5), and carrying out hot-pressing reinforcement on the prefabricated bodies paved with the carbon fiber mats, wherein the thickness of the carbon fiber mats is 0.8-1.2 mm, the temperature is controlled at 1100-1400 ℃ during hot-pressing reinforcement, and the time for hot-pressing reinforcement is 0.5-1.3h.
According to the manufacturing method of the carbon fiber composite material prefabricated body for the fuel cell hydrogen energy automobile, the double-layer graphene thin layer is added in the production process of the prefabricated body, the upper limit value of the pressure bearing of the prefabricated body is greatly enhanced under the condition that the volume of the prefabricated body is not increased, and experiments prove that the arrangement of the double-layer graphene thin layer can resist the impact force generated when a common bullet shoots, so that the hardness of the prefabricated body is improved, the embrittlement of the prefabricated body is avoided, the functional failure is avoided, the double-layer graphene thin layer has the heat conduction characteristic, the heat emission can be realized by quickly transferring heat during use, the overheat of accessories caused by the rapid temperature rise is avoided, and the service life of a product, namely the safety performance is greatly improved.
The present invention is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed within the scope of the present invention.
Claims (7)
1. A method for manufacturing a carbon fiber composite material preform for a fuel cell hydrogen energy automobile is characterized by comprising the following steps of: the method comprises the following operation steps:
s1, core body glue pressing: coating impregnating adhesive on two sides of a multi-layer cloth, forming the multi-layer coated impregnating adhesive into waves, stacking the multi-layer waved cloth layer by layer, forming the multi-layer waved cloth into a honeycomb plate shape in a hot-press solidification mode, and cutting the multi-layer waved cloth into honeycomb strips for standby;
s2, shaping a core:
shaping the honeycomb strip in the step S1;
s3, graphene preparation:
preparing a single-layer graphene thin layer material;
s4, stacking and pasting graphene:
applying the single-layer graphene thin layer prepared in the step S3 on two sides of the honeycomb strip formed in the step S2;
s5, graphene hot press curing:
placing the formed honeycomb strip with the graphene thin layer attached in the step S4 into a mould for hot press curing, and performing extrusion reinforcement through compression molding equipment while performing hot press curing to obtain a preform;
s6, local area reinforcement:
and (5) paving one or more carbon fiber felts with graphene thin layers on the single-side surfaces at weak parts of the surfaces of the prefabricated body after extrusion processing in the step (S5), and carrying out hot pressing reinforcement again.
2. The method for manufacturing a carbon fiber composite preform for a fuel cell hydrogen energy automobile according to claim 1, characterized by: in the step S1, the fabric is non-dewaxed alkali-free plain fabric, and the impregnating adhesive is epoxy resin glue solution or polyvinyl acetal.
3. The method for manufacturing a carbon fiber composite preform for a fuel cell hydrogen energy automobile according to claim 1, characterized by: in the step S2, the honeycomb strip is formed by placing it into a forming mold, and heating the honeycomb strip by the forming mold for a certain period of time.
4. The method for manufacturing a carbon fiber composite preform for a fuel cell hydrogen energy automobile according to claim 1, characterized by: in the step S3, the single-layer graphene thin-layer material is obtained by using friction and relative movement between the object and the graphene through a mechanical stripping method.
5. The method for manufacturing a carbon fiber composite preform for a fuel cell hydrogen energy automobile according to claim 1, characterized by: and (3) applying the single-layer graphene thin layer obtained in the step (S4) on two sides of the formed honeycomb strip, and repeating the operation twice on each side, so that two single-layer graphene thin layer materials are applied on the surface of each side of the honeycomb strip, and a double-layer graphene thin layer is obtained.
6. The method for manufacturing a carbon fiber composite preform for a fuel cell hydrogen energy automobile according to claim 1, characterized by: in the step S6, the thickness of the single-layer carbon fiber felt is 0.8-1.2 mm.
7. The method for manufacturing a carbon fiber composite preform for a fuel cell hydrogen energy automobile according to claim 6, characterized by: in the step S6, the number of layers of the carbon fiber felt is 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011396013.7A CN112873895B (en) | 2020-12-03 | 2020-12-03 | Method for manufacturing carbon fiber composite material prefabricated body for fuel cell hydrogen energy automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011396013.7A CN112873895B (en) | 2020-12-03 | 2020-12-03 | Method for manufacturing carbon fiber composite material prefabricated body for fuel cell hydrogen energy automobile |
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| CN112873895A CN112873895A (en) | 2021-06-01 |
| CN112873895B true CN112873895B (en) | 2023-10-24 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4680216A (en) * | 1984-09-04 | 1987-07-14 | United Technologies Corporation | Method for stabilizing thick honeycomb core composite articles |
| EP3590833A1 (en) * | 2018-07-05 | 2020-01-08 | AIRBUS HELICOPTERS DEUTSCHLAND GmbH | Composite materials in control elements for controlling the pitch of rotor blades |
| CN111730878A (en) * | 2020-06-09 | 2020-10-02 | 北京化工大学 | Method for improving heat resistance of carbon fiber resin matrix composite |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150151524A1 (en) * | 2012-12-19 | 2015-06-04 | Embraer S.A. | Methods for fabricating stabilized honeycomb core composite laminate structures |
| FR3028515B1 (en) * | 2014-11-14 | 2018-01-12 | Thales | COMPOSITE STRUCTURE COMPRISING A RESIN CHARGED WITH GRAPHENE PLATE SHEETS WITH THERMAL CONDUCTIVITY AND REINFORCED ELECTRICAL CONDUCTIVITY, IN PARTICULAR FOR SATELLITE |
| US10327429B2 (en) * | 2015-06-02 | 2019-06-25 | G-Rods International Llc | Incorporation of graphene in various components and method of manufacturing |
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2020
- 2020-12-03 CN CN202011396013.7A patent/CN112873895B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4680216A (en) * | 1984-09-04 | 1987-07-14 | United Technologies Corporation | Method for stabilizing thick honeycomb core composite articles |
| EP3590833A1 (en) * | 2018-07-05 | 2020-01-08 | AIRBUS HELICOPTERS DEUTSCHLAND GmbH | Composite materials in control elements for controlling the pitch of rotor blades |
| CN111730878A (en) * | 2020-06-09 | 2020-10-02 | 北京化工大学 | Method for improving heat resistance of carbon fiber resin matrix composite |
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Address after: 430000 Building 1, No. 99, Weilai Third Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: Grove Hydrogen Energy Technology Group Co.,Ltd. Address before: 430000 Building 1, No. 99, Weilai Third Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee before: WUHAN LUOGEFU HYDROGEN ENERGY AUTOMOBILE Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A method for manufacturing carbon fiber composite preforms for fuel cell hydrogen vehicles Granted publication date: 20231024 Pledgee: Jinan Luneng Kaiyuan Group Co.,Ltd. Pledgor: Grove Hydrogen Energy Technology Group Co.,Ltd. Registration number: Y2024980009137 |