CN109326443B - Film capacitor for new energy automobile quick charge system - Google Patents
Film capacitor for new energy automobile quick charge system Download PDFInfo
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- CN109326443B CN109326443B CN201811307594.5A CN201811307594A CN109326443B CN 109326443 B CN109326443 B CN 109326443B CN 201811307594 A CN201811307594 A CN 201811307594A CN 109326443 B CN109326443 B CN 109326443B
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- new energy
- energy automobile
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- 239000003990 capacitor Substances 0.000 title claims abstract description 50
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 74
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 74
- 239000010408 film Substances 0.000 claims abstract description 65
- 239000011248 coating agent Substances 0.000 claims abstract description 39
- 238000000576 coating method Methods 0.000 claims abstract description 39
- 239000011104 metalized film Substances 0.000 claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims abstract description 5
- -1 polypropylene Polymers 0.000 claims description 34
- 239000004743 Polypropylene Substances 0.000 claims description 32
- 229920001155 polypropylene Polymers 0.000 claims description 32
- 238000007747 plating Methods 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 19
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 14
- 229910052724 xenon Inorganic materials 0.000 claims description 14
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000001771 vacuum deposition Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract description 7
- 238000004804 winding Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 23
- 230000006872 improvement Effects 0.000 description 9
- 239000000243 solution Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/33—Thin- or thick-film capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/005—Electrodes
- H01G4/008—Selection of materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/32—Wound capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention relates to a film capacitor for a new energy automobile quick charging system, which comprises a capacitor shell and a capacitor core positioned in the capacitor shell, wherein the capacitor core is made of an impact-resistant metalized film through winding and metal spraying, the impact-resistant metalized film comprises an insulating base film, one surface of the insulating base film is provided with a graphene coating, and the surface of the graphene coating is provided with an aluminum coating. The film capacitor for the new energy automobile rapid charging system has the advantages of being far superior to a common metalized film capacitor in current impact resistance, short-circuit charging and discharging and voltage resistance, small in heat productivity, long in service life, capable of being reliably applied to the new energy automobile rapid charging system, and great in popularization value.
Description
Technical Field
The invention relates to a film capacitor for a new energy automobile rapid charging system, and belongs to the technical field of capacitors.
Background
With the limited availability of conventional energy and the increasing prominence of environmental issues, the use of new energy is being effectively exploited and utilized. And new energy vehicles are being developed more and more as representatives of the current new energy projects. The popularization of new energy automobiles is that a quick charging system cannot be used. With the continuous development of the rapid charging technology, in a rapid charging system of a new energy automobile, a film capacitor is used as an energy storage element, and the capacitor is required to meet the increasing technical requirements of large capacitance, high voltage resistance, high current impact resistance and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a film capacitor for a new energy automobile quick charging system, and the specific technical scheme is as follows:
the utility model provides a new energy automobile is film capacitor for quick charging system, includes capacitor case and is located the inside capacitor core of capacitor case, the capacitor core is made through coiling, metal spraying by the metallized film of shock resistance, the metallized film of shock resistance includes the insulated base film, the one side of insulated base film is provided with graphite alkene cladding material, the surface of graphite alkene cladding material is provided with the aluminum coating.
As an improvement of the technical scheme, the insulating base film is a polypropylene film.
As an improvement of the above technical solution, the manufacturing method of the graphene plating layer comprises: feeding the polypropylene film into a coating chamber, continuously introducing nitrogen into the coating chamber, and keeping the air pressure in the coating chamber at 101.8-102.2 kPa; a cooling roller and an injection pipe are arranged in the coating chamber, the injection pipe is arranged right above the cooling roller, the back surface of the polypropylene film is wound around the cooling roller, a pipe orifice of the injection pipe is right opposite to the front surface of the polypropylene film, and a high-temperature graphene jet flow is injected from the pipe orifice of the injection pipe and is an air flow mixed with graphene powder by high-temperature xenon; when the high-temperature graphene jet flow is sprayed to the front of the polypropylene film, a part of high-temperature graphene powder in the high-temperature graphene jet flow impacts the front of the polypropylene film to form a graphene coating.
As an improvement of the technical scheme, the temperature of the high-temperature graphene jet flow is 330-350 ℃.
As an improvement of the technical scheme, 0.21-0.23 g of graphene powder is mixed in each liter of xenon in the high-temperature graphene jet flow.
As an improvement of the technical scheme, the flow velocity of the high-temperature graphene jet flow at the nozzle of the jet pipe is 8.5-8.9 m/s.
As an improvement of the technical scheme, the particle size of the graphene powder is less than or equal to 80 nm.
As an improvement of the technical scheme, the cooling temperature of the surface of the cooling roller is 3-6 ℃.
As an improvement of the above technical solution, the manufacturing method of the aluminum plating layer comprises: and plating an aluminum coating on the surface of the graphene coating by a vacuum coating process.
The invention has the beneficial effects that:
the film capacitor for the new energy automobile rapid charging system has the advantages of being far superior to a common metalized film capacitor in current impact resistance, short-circuit charging and discharging and voltage resistance, small in heat productivity, long in service life, capable of being reliably applied to the new energy automobile rapid charging system, and great in popularization value.
Drawings
Fig. 1 is a schematic structural diagram of a film capacitor for a rapid charging system of a new energy automobile according to the present invention;
FIG. 2 is a schematic view showing the arrangement of the cooling roll, the injection tube and the insulating base film according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1, the film capacitor for the new energy automobile rapid charging system comprises a capacitor shell and a capacitor core located inside the capacitor shell, wherein the capacitor core is made of an impact-resistant metalized film through winding and metal spraying, the impact-resistant metalized film comprises an insulating base film 10, one surface of the insulating base film 10 is provided with a graphene plating layer 20, and the surface of the graphene plating layer 20 is provided with an aluminum plating layer 30. Wherein the base insulating film 10 is a polypropylene film.
The manufacturing method of the graphene coating 20 comprises the following steps: feeding the polypropylene film into a coating chamber, continuously introducing nitrogen into the coating chamber, and keeping the air pressure in the coating chamber at 101.8-102.2 kPa; a cooling roller 1 and an injection pipe 2 are arranged in the coating chamber, as shown in fig. 2, the injection pipe 2 is arranged right above the cooling roller 1, the back surface of the polypropylene film is wound around the cooling roller 1, the pipe orifice of the injection pipe 2 is right opposite to the front surface of the polypropylene film, and the pipe orifice of the injection pipe 2 injects high-temperature graphene jet flow which is airflow with high-temperature xenon mixed with graphene powder; when the high-temperature graphene jet flow is sprayed to the front surface of the polypropylene film, a part of high-temperature graphene powder in the high-temperature graphene jet flow impacts the front surface of the polypropylene film to form a graphene coating 20. The temperature of the high-temperature graphene jet flow is 330-350 ℃. In the high-temperature graphene jet flow, 0.21-0.23 g of graphene powder is mixed in each liter of xenon. The flow velocity of the high-temperature graphene jet flow at the pipe orifice of the injection pipe 2 is 8.5-8.9 m/s. The particle size of the graphene powder is less than or equal to 80 nm. The cooling temperature of the surface of the cooling roller 1 is 3-6 ℃.
The manufacturing method of the aluminum plating layer 30 comprises the following steps: and plating an aluminum plating layer 30 on the surface of the graphene plating layer 20 by a vacuum plating process.
In the embodiment, the graphene plating layer 20 and the aluminum plating layer 30 form a conductive layer, and the sheet resistance of the conductive layer is 0.56 to 0.71 Ω/◇.
And applying 2000V direct-current voltage to two ends of the film capacitor for the new energy automobile rapid charging system for 1 second, and then short-circuiting and discharging for 0.5 second. The increment of the loss tangent and the change of the capacitance of the capacitor were observed as follows:
1) after 85000 times of short circuit charging and discharging, the capacitor still works normally and has good electrical property; if the short circuit charging and discharging times are 85000 times, under the test frequency of 1KHz, measuring delta tg less than or equal to 0.0003; delta C/C is less than or equal to 4.7 percent.
2) And the direct-current breakdown voltage is more than or equal to 5000V.
Example 2
A common capacitor core in a common metallized film capacitor is made of a common metallized film through winding and metal spraying, wherein the common metallized film is a metal aluminum plating layer made on one surface of a polypropylene film through a vacuum coating process, the thickness of the metal aluminum plating layer is equal to that of the conducting layer in the embodiment 1, and the sheet resistance of the metal aluminum plating layer is 12-16 omega/◇.
A dc voltage of 2000V was applied to both ends of the general metallized film capacitor for 1 second, and then short-circuit discharged for 0.5 second. The increment of the loss tangent and the change of the capacitance of the capacitor were observed as follows:
1) after 500 times of short-circuit charging and discharging, the common metallized film is broken down in large scale, and the capacitor is scrapped!
2) And the direct-current breakdown voltage is less than or equal to 1800V.
In the above examples, it can be seen by comparing example 1 with example 2 that: compared with the existing common metalized film, in the film capacitor for the new energy automobile rapid charging system, the sheet resistance of the conducting layer in the impact-resistant metalized film is small, and the heat generated by the conducting layer is small under the same charge and discharge electric quantity; therefore, the impact-resistant metallized film can resist the impact of larger current; in addition, the capacitor is far superior to a common metalized film capacitor in short-circuit charging and discharging and voltage resistance; therefore, the film capacitor for the new energy automobile quick charging system can be reliably applied to circuits of quick charging systems such as the new energy automobile quick charging system and the like.
In the impact-resistant metallized film, the graphene coating 20 is composed of graphene, and the conductivity of the graphene is far better than that of metal aluminum. And in the manufacturing process of the graphene coating 20, the nitrogen continuously introduced into the coating chamber is used as a protective gas, so that the graphene can be prevented from being oxidized. The air pressure inside the coating chamber is greater than the atmospheric pressure, so that the outside air cannot enter the coating chamber. The xenon is compressed into compressed xenon, the high-temperature compressed xenon is formed by heating, the high-temperature compressed xenon is introduced into a storage chamber filled with graphene powder, high-temperature graphene jet flow is formed in air flow sprayed out from an outlet of the storage chamber, when the high-temperature graphene jet flow is sprayed to the front of a polypropylene film, the front of the polypropylene film can be softened by the high-temperature xenon, the graphene is also a hot excellent conductor, therefore, the impact position of the high-temperature graphene particles is instantly melted when the high-temperature graphene particles impact the front of the polypropylene film, the heat of the graphene particles continuously runs off along with the continuous deep impact of the graphene particles, and the back of the polypropylene film is continuously cooled by a cooling roller 1, so that the combination between the graphene particles and the polypropylene film is completed. The graphene coating 20 is finally prepared by strictly controlling the temperature of the high-temperature graphene jet flow, the content of graphene powder in the high-temperature graphene jet flow, the flow rate of the high-temperature graphene jet flow and the cooling temperature of the surface of the cooling roller 1. Wherein, the minimum distance between the orifice of the injection pipe 2 and the front surface of the polypropylene film is strictly controlled to be 2-3 mm. The reason why xenon gas is used is because: xenon is an inert gas, further protecting graphene from oxidation, and its density is much higher than that of nitrogen, which is beneficial for xenon to finally fall on the front surface of the polypropylene film of the underlying ejector tube 2.
In the invention, the coverage rate of the graphene on the surface of the polypropylene film is 55-68%. The measurement method of the coverage rate is as follows: irradiating the polypropylene film by using a spotlight, wherein the light intensity of the light passing through the polypropylene film is X; the front surface of the polypropylene film is plated with a graphene coating 20, at the moment, the back surface of the polypropylene film covers the lamp holder of the spotlight, due to the covering of the graphene coating 20, the light intensity penetrating through the graphene coating 20 is weakened, the light intensity penetrating through the graphene coating 20 is Y, the difference value between X and Y is X-Y, and the percentage of the ratio between X-Y and X is the coverage rate. Because the graphene is only covered with a very sparse layer on the surface of the polypropylene film, and then the aluminum plating layer 30 is adopted to cover the graphene plating layer 20, the using amount of the graphene can be obviously reduced, the production cost can be reduced, and a compact aluminum oxide film protective layer can be formed on the surface of the aluminum plating layer 30, so that the conductive layer is effectively prevented from being further oxidized and corroded, and the service life of the impact-resistant metallized film is prolonged.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The utility model provides a new energy automobile is film capacitor for quick charging system, includes capacitor case and the capacitor core that is located capacitor case inside, the capacitor core is made through coiling, metal spraying by the impact-resistant metallized film, the impact-resistant metallized film includes insulating base film, its characterized in that: a graphene coating is arranged on one surface of the insulating base film, and an aluminum coating is arranged on the surface of the graphene coating;
the insulation base film is a polypropylene film, and the manufacturing method of the graphene coating comprises the following steps: feeding the polypropylene film into a coating chamber, continuously introducing nitrogen into the coating chamber, and keeping the air pressure in the coating chamber at 101.8-102.2 kPa; a cooling roller and an injection pipe are arranged in the coating chamber, the injection pipe is arranged right above the cooling roller, the back surface of the polypropylene film is wound around the cooling roller, a pipe orifice of the injection pipe is right opposite to the front surface of the polypropylene film, and a high-temperature graphene jet flow is injected from the pipe orifice of the injection pipe and is an air flow mixed with graphene powder by high-temperature xenon; when the high-temperature graphene jet flow is sprayed to the front of the polypropylene film, a part of high-temperature graphene powder in the high-temperature graphene jet flow impacts the front of the polypropylene film to form a graphene coating.
2. The film capacitor for the new energy automobile rapid charging system according to claim 1, characterized in that: the temperature of the high-temperature graphene jet flow is 330-350 ℃.
3. The film capacitor for the new energy automobile rapid charging system according to claim 1, characterized in that: in the high-temperature graphene jet flow, 0.21-0.23 g of graphene powder is mixed in each liter of xenon.
4. The film capacitor for the new energy automobile rapid charging system according to claim 3, characterized in that: the flow velocity of the high-temperature graphene jet flow at the nozzle of the jet pipe is 8.5-8.9 m/s.
5. The film capacitor for the new energy automobile rapid charging system according to claim 1, characterized in that: the particle size of the graphene powder is less than or equal to 80 nm.
6. The film capacitor for the new energy automobile rapid charging system according to claim 1, characterized in that: the cooling temperature of the surface of the cooling roller is 3-6 ℃.
7. The film capacitor for the new energy automobile rapid charging system according to claim 1, characterized in that: the manufacturing method of the aluminum coating comprises the following steps: and plating an aluminum coating on the surface of the graphene coating by a vacuum coating process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811307594.5A CN109326443B (en) | 2018-11-05 | 2018-11-05 | Film capacitor for new energy automobile quick charge system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811307594.5A CN109326443B (en) | 2018-11-05 | 2018-11-05 | Film capacitor for new energy automobile quick charge system |
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| CN109326443B true CN109326443B (en) | 2020-08-04 |
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| CN110364358A (en) * | 2019-08-08 | 2019-10-22 | 安徽省宁国市海伟电子有限公司 | A kind of high conductivity anti-explosion safety film |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417538A (en) * | 2016-01-11 | 2016-03-23 | 王惠丽 | Method for preparing graphene through jet flow pretreatment |
| CN106206015A (en) * | 2016-08-27 | 2016-12-07 | 安徽省宁国市海伟电子有限公司 | A kind of high temperature polypropylene metallized film |
| CN107275085A (en) * | 2017-05-24 | 2017-10-20 | 南京理工大学 | A kind of graphene-based high-voltage pulse thin film capacitor |
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2018
- 2018-11-05 CN CN201811307594.5A patent/CN109326443B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417538A (en) * | 2016-01-11 | 2016-03-23 | 王惠丽 | Method for preparing graphene through jet flow pretreatment |
| CN106206015A (en) * | 2016-08-27 | 2016-12-07 | 安徽省宁国市海伟电子有限公司 | A kind of high temperature polypropylene metallized film |
| CN107275085A (en) * | 2017-05-24 | 2017-10-20 | 南京理工大学 | A kind of graphene-based high-voltage pulse thin film capacitor |
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Address after: 244000, Floor 1, Building 15, Science and Technology Innovation Park, East of Tongjingshan Avenue and North of Tongjing East Road, Shizishan High tech Zone, Tongguan District, Tongling City, Anhui Province Patentee after: Tongling Chaoyue Electronics Co.,Ltd. Country or region after: China Address before: 244000 No. 1111, east section of Weiyi Road, Shizishan District, Tongling City, Anhui Province (1 plant and 2 warehouse) Patentee before: TONGLING BEYOND ELECTRONICS Co.,Ltd. Country or region before: China |