CN113369238B - Method and device for cleaning graphite bipolar plate - Google Patents
Method and device for cleaning graphite bipolar plate Download PDFInfo
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- CN113369238B CN113369238B CN202010115953.8A CN202010115953A CN113369238B CN 113369238 B CN113369238 B CN 113369238B CN 202010115953 A CN202010115953 A CN 202010115953A CN 113369238 B CN113369238 B CN 113369238B
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- bipolar plate
- graphite bipolar
- compressed air
- vacuum
- cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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- Battery Electrode And Active Subsutance (AREA)
Abstract
The application relates to a method and a device for cleaning a graphite bipolar plate, wherein the method comprises the following steps: placing the graphite bipolar plate impregnated with the resin solution on a vacuum tray, and opening a vacuum control valve; opening a compressed air control valve, and distributing compressed air to the whole surface of the graphite bipolar plate through an air knife; and blowing an air knife from one end of the graphite bipolar plate to the other end of the graphite bipolar plate along the direction of the flow channel in the graphite bipolar plate; closing the vacuum valve and turning over the graphite bipolar plate; and cleaning the other side of the graphite bipolar plate. By adopting the method and the device, the wastewater treatment cost can be reduced, the graphite bipolar plate is prevented from being damaged, and the risk of excessive cleaning is avoided.
Description
Technical Field
The present application relates to the field of batteries, and more particularly, to a method and apparatus for cleaning a graphite bipolar plate in a fuel cell.
Background
The fuel cell is a chemical device which directly converts chemical energy of fuel into electric energy, and does not generate noise or harmful gas, so that the fuel cell is a clean and efficient green and environment-friendly power supply. Bipolar plates are one of the key components of fuel cells, being the "backbone" in the stack. The bipolar plate and the membrane electrode layer are assembled into an electric pile, which plays a supporting role in the fuel cell, and can also collect current, provide channels for cooling liquid, separate oxidant and reductant and the like.
At present, the bipolar plates generally adopted by the fuel cell comprise a metal bipolar plate, a flexible graphite bipolar plate and the like. Compared with metal bipolar plates, flexible graphite bipolar plates have the characteristics of high conductivity, corrosion resistance, light weight and the like, and have become the development focus of bipolar plates.
In the prior art, a method for preparing a graphite bipolar plate by using flexible graphite is to obtain a molded flexible graphite plate by performing processes of dipping, rinsing, curing and the like on a compression-molded graphite plate. In the rinsing process of the process flow, the surface of the flexible graphite plate needs to be cleaned by a surfactant and then by deionized water to remove the resin on the surface of the impregnated flexible graphite plate. In the rinsing process, an organic solvent surfactant and a large amount of deionized water are required, and thus a large amount of wastewater is generated, resulting in increased production costs and wastewater treatment costs. Meanwhile, in the cleaning process, due to the relative movement of the graphite bipolar plate, the tool and the cleaning liquid, the graphite plate is easy to scratch and damage the tool, so that the tool for storing the graphite plate is designed strictly. Furthermore, there is a risk of over-cleaning during cleaning with water, which also affects the quality of the graphite bipolar plate.
Disclosure of Invention
The object of the present application is to provide a method and apparatus for cleaning a graphite bipolar plate.
Embodiments of the present application provide a method of cleaning a graphite bipolar plate, the method comprising: placing the graphite bipolar plate impregnated with the resin solution on a vacuum tray, and opening a vacuum control valve; opening a compressed air control valve, and distributing compressed air to the whole surface of the graphite bipolar plate through an air knife; and blowing an air knife from one end of the graphite bipolar plate to the other end of the graphite bipolar plate along the direction of the flow channel in the graphite bipolar plate; closing the vacuum control valve and turning over the graphite bipolar plate; and cleaning the other side of the graphite bipolar plate.
Further, the method further comprises: the pressure of the compressed air is controlled through the compressed air control valve, and the wind power at the wind knife is adjusted.
Further, the method further comprises: the pressure of the compressed air is adjusted to 0 to 0.7 mpa.
Further, the method further comprises: and collecting and blowing the obtained resin solution through a liquid discharge groove at the top end of the vacuum tray.
Further, the method further comprises: the resin solution is prevented from being splashed by the guard rail on the upper part of the vacuum tray.
Embodiments of the present application also provide an apparatus for cleaning a graphite bipolar plate, the apparatus including: the bottom of the vacuum tray is rectangular, and the upper part of the vacuum tray is provided with through holes which are uniformly distributed; a vacuum control valve located at a side of the vacuum tray; guard rails positioned above three sides of the vacuum tray and extending upward by the same length; and a liquid discharge groove which is positioned between the upper part of the vacuum tray and the side edge opposite to the opening of the vacuum tray.
Further, the device also comprises an air knife device, wherein the air knife device comprises an air knife part, a compressed air control valve and a compressed air pipeline.
Further, the apparatus further comprises: the pressure of the compressed air is controlled through the compressed air control valve, and the wind power at the wind knife is adjusted.
Further, the apparatus further comprises: the pressure of the compressed air is adjusted to 0 to 0.7 mpa.
By adopting the method and the device, the wastewater treatment cost can be reduced, the graphite bipolar plate is prevented from being damaged, and the risk of excessively cleaning the graphite bipolar plate is avoided.
Drawings
Fig. 1 shows a schematic view of the state when cleaning resin on a graphite bipolar plate according to an embodiment of the present application.
Fig. 2 shows a schematic view of a specific structure of an apparatus for cleaning a graphite bipolar plate.
Fig. 3 shows a schematic structural view of an air knife device that can be used in correspondence with the vacuum tray shown in fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application 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 present application and are not intended to limit the present application.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Figure 1 shows a flow diagram of a method of making a graphite bipolar plate according to an embodiment of the present application. The diagram is merely an example and is not intended to limit the scope of what is claimed in this application.
In the first step, the flexible graphite bipolar plate impregnated with the resin solution is placed on a vacuum tray, a vacuum control valve is opened, and at the moment, a gap between the graphite bipolar plate and the tray is in a vacuum state, so that the flexible graphite plate is fixed on the vacuum tray due to atmospheric pressure;
in a second step, the compressed air control valve is opened and compressed air can be distributed over the entire surface of the graphite bipolar plate by means of an air knife. The pressure of the compressed air (for example, the pressure of 0-0.7 MPa) can be controlled through the compressed air control valve, so that the wind power at the air knife is adjusted;
in the third step, the air knife sweeps slowly from one end of the graphite bipolar plate to the other end of the graphite bipolar plate along the direction of the flow channels in the graphite bipolar plate. Guard rails are provided around the vacuum tray to prevent the resin from being scattered. The top end of the vacuum tray is additionally provided with a groove containing a discharge port for collecting resin solution generated by purging and cleaning, and the excessive resin solution can be discharged through the discharge port and enter a wastewater treatment system;
in the fourth step, the vacuum valve is closed and the graphite bipolar plate is turned over. And (3) finishing purging and cleaning the other surface of the flexible graphite bipolar plate by adopting the same method and steps.
Compared with the prior scheme of cleaning the surface resin of the graphite bipolar plate, the technical scheme of the invention can obtain the following beneficial technical effects:
1) a large amount of deionized water is not consumed, and the wastewater treatment cost can be greatly reduced;
2) compared with the traditional cleaning of a surfactant and deionized water, the air knife is not contacted with the graphite plate, and no scratch damage is generated in the process of blowing and cleaning by dry air;
3) compared with the traditional surfactant and deionized water cleaning, the method has the advantages that compressed air is adopted for blowing, and only the residual resin solution on the surface of the flexible graphite bipolar plate is removed, so that the problem of excessive cleaning is avoided.
The present application also relates to an apparatus for cleaning a graphite bipolar plate. A schematic diagram of a specific structure of the apparatus is shown in fig. 2.
As shown in fig. 2, the apparatus includes:
the bottom of the vacuum tray is rectangular, and the upper part of the vacuum tray is provided with through holes which are uniformly distributed;
a vacuum control valve located at a side of the vacuum tray, when the graphite bipolar plate is placed above the vacuum tray, if the vacuum control valve is opened, air in a gap between the graphite bipolar plate and the vacuum tray is drawn through a through-hole above the vacuum tray, so that the gap between the graphite bipolar plate and the vacuum tray is in a vacuum state;
guard rails respectively extending upward from three sides of the vacuum tray by the same length for preventing resin from being splashed during a process of purging and cleaning a generated resin solution; an opening is formed on the other side of the vacuum tray and is used for placing the graphite bipolar plate on the vacuum tray; and
and the liquid discharge groove is a groove-shaped gap formed between the upper part of the vacuum tray and the side edge opposite to the opening of the vacuum tray, and when the resin solution on the graphite bipolar plate is blown by an air knife, the resin solution enters the inner space between the upper plane and the lower plane of the vacuum tray through the liquid discharge groove.
Fig. 3 shows a schematic structural view of an air knife device that can be used in correspondence with the vacuum tray shown in fig. 2.
As shown in fig. 3, the air knife device includes an air knife portion, a compressed air control valve, and a compressed air line. When the compressed air control valve is opened, compressed air enters the air knife portion through the compressed air line, which then distributes the compressed air over the entire surface of the graphite bipolar plate. The pressure of the compressed air (for example, the pressure of 0-0.7 MPa) can be controlled by adjusting the compressed air control valve, so that the wind power at the wind knife part can be adjusted.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (3)
1. A method of cleaning a graphite bipolar plate, the method comprising:
placing the graphite bipolar plate impregnated with the resin solution on a vacuum tray, and opening a vacuum control valve;
opening a compressed air control valve, and distributing compressed air to the whole surface of the graphite bipolar plate through an air knife; and
blowing an air knife from one end of the graphite bipolar plate to the other end of the graphite bipolar plate along the direction of the flow channel in the graphite bipolar plate;
closing the vacuum control valve and turning over the graphite bipolar plate; and cleaning the other side of the graphite bipolar plate;
the bottom of the vacuum tray is rectangular, and the upper part of the vacuum tray is provided with through holes which are uniformly distributed; collecting the resin solution obtained by blowing through a liquid discharge groove at the top end of the vacuum tray;
wherein, also include the guard rail, locate three sides of the said vacuum tray and extend the same length upwards, through the guard rail on the upper portion of the vacuum tray, prevent the resin solution from splashing.
2. The method of claim 1, wherein the magnitude of the wind force at the wind knife is adjusted by controlling the magnitude of the pressure of the compressed air through the compressed air control valve.
3. The method of claim 1, wherein the pressure of the compressed air is adjusted to a magnitude of 0 to 0.7 megapascals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010115953.8A CN113369238B (en) | 2020-02-25 | 2020-02-25 | Method and device for cleaning graphite bipolar plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010115953.8A CN113369238B (en) | 2020-02-25 | 2020-02-25 | Method and device for cleaning graphite bipolar plate |
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| CN113369238A CN113369238A (en) | 2021-09-10 |
| CN113369238B true CN113369238B (en) | 2022-09-16 |
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| CN202010115953.8A Active CN113369238B (en) | 2020-02-25 | 2020-02-25 | Method and device for cleaning graphite bipolar plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114864983A (en) * | 2022-01-27 | 2022-08-05 | 上海神力科技有限公司 | Flexible graphite polar plate for fuel cell and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101196809B1 (en) * | 2012-03-12 | 2012-11-06 | 임선빈 | Cleaning device and method for works of press mold |
| CN202610326U (en) * | 2012-05-22 | 2012-12-19 | 中节能太阳能科技有限公司 | On-line blowing device of plate type plasma enhanced chemical vapor deposition (PECVD) coating of crystalline silicon solar cell |
| CN108325881A (en) * | 2018-02-28 | 2018-07-27 | 广东国鸿氢能科技有限公司 | Graphite bi-polar plate auto-cleaner |
| CN109560303A (en) * | 2018-11-03 | 2019-04-02 | 上海弘枫实业有限公司 | A kind of runner treatment process of graphite bi-polar plate |
| CN209708957U (en) * | 2019-06-19 | 2019-11-29 | 杭州纤纳光电科技有限公司 | A kind of electro-conductive glass cleaning device |
-
2020
- 2020-02-25 CN CN202010115953.8A patent/CN113369238B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101196809B1 (en) * | 2012-03-12 | 2012-11-06 | 임선빈 | Cleaning device and method for works of press mold |
| CN202610326U (en) * | 2012-05-22 | 2012-12-19 | 中节能太阳能科技有限公司 | On-line blowing device of plate type plasma enhanced chemical vapor deposition (PECVD) coating of crystalline silicon solar cell |
| CN108325881A (en) * | 2018-02-28 | 2018-07-27 | 广东国鸿氢能科技有限公司 | Graphite bi-polar plate auto-cleaner |
| CN109560303A (en) * | 2018-11-03 | 2019-04-02 | 上海弘枫实业有限公司 | A kind of runner treatment process of graphite bi-polar plate |
| CN209708957U (en) * | 2019-06-19 | 2019-11-29 | 杭州纤纳光电科技有限公司 | A kind of electro-conductive glass cleaning device |
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| CN113369238A (en) | 2021-09-10 |
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