CN-122016634-A - Powder falling rate detection device and powder falling rate detection method for flexible graphite plate

CN122016634ACN 122016634 ACN122016634 ACN 122016634ACN-122016634-A

Abstract

The application discloses a powder falling rate detection device and a powder falling rate detection method of a flexible graphite plate, wherein the powder falling rate detection method comprises the steps of providing a positioning plane and flatly fixing the flexible graphite plate on the positioning plane; providing white wiping cotton, wiping the surface of the flexible graphite plate by using the white wiping cotton according to a preset mode to obtain target wiping cotton, wherein the target wiping cotton is the white wiping cotton which has wiped the surface of the flexible graphite plate, and obtaining the powder dropping rate of the flexible graphite plate according to the color of the wiping surface of the target wiping cotton. According to the technical scheme, the powder dropping rate of the surface of the flexible graphite plate can be effectively detected.

Inventors

YU MENGJIE
DENG YIJIE
DENG LIANG
LONG XIANG
DENG KE
SHEN JIAO

Assignees

广东环华氢能科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260129

Claims (10)

1. The method for detecting the powder dropping rate of the flexible graphite plate is characterized by comprising the following steps of: providing a positioning plane, and flatly fixing the flexible graphite plate on the positioning plane; Providing white wiping cotton, and wiping the surface of the flexible graphite plate by using the white wiping cotton according to a preset mode to obtain target wiping cotton, wherein the target wiping cotton is the white wiping cotton which has wiped the surface of the flexible graphite plate; and obtaining the powder dropping rate of the flexible graphite plate according to the wiping surface color of the target wiping cotton.
2. The method for detecting a powder falling rate according to claim 1, wherein the step of flatly fixing the flexible graphite sheet on the positioning plane comprises: And the flexible graphite plate is flatly fixed on the positioning plane in a vacuum adsorption mode.
3. The method for detecting a powder falling rate according to claim 1, wherein the wiping the surface of the flexible graphite sheet with the white wiping cotton in a predetermined manner to obtain a target wiping cotton comprises: And controlling the white wiping cotton to work according to a preset wiping pressure value, a preset wiping frequency and a preset wiping time length so as to wipe the surface of the flexible graphite plate and obtain the target wiping cotton.
4. A method for detecting a powder falling rate according to any one of claims 1 to 3, wherein the obtaining the powder falling rate of the flexible graphite sheet according to the wiping surface color of the target wiping cotton comprises: And manually comparing the wiping surface color of the target wiping cotton with a preset gray card to obtain the powder dropping rate of the flexible graphite plate.
5. A method for detecting a powder falling rate according to any one of claims 1 to 3, wherein the obtaining the powder falling rate of the flexible graphite sheet according to the wiping surface color of the target wiping cotton comprises: Providing an image recognition mechanism, collecting the wiping surface color of the target wiping cotton through the image recognition mechanism, and carrying out recognition matching on the wiping surface color of the target wiping cotton and a pre-stored gray scale to obtain the powder dropping rate of the flexible graphite plate.
6. The device for detecting the powder dropping rate of the flexible graphite plate is characterized by comprising a positioning mechanism and a wiping mechanism, The positioning mechanism is provided with a positioning plane and is used for flatly fixing the flexible graphite plate on the positioning plane; the wiping mechanism is provided with white wiping cotton, the wiping mechanism is arranged to wipe the surface of the flexible graphite plate by using the white wiping cotton in a preset mode to obtain target wiping cotton, and the target wiping cotton is the white wiping cotton which has wiped the surface of the flexible graphite plate.
7. The powder drop rate detection device according to claim 6, wherein the positioning mechanism comprises a positioning platform and a vacuum adsorption system, the positioning platform is provided with a positioning plane, a vacuum chamber communicated with the vacuum adsorption system is arranged inside the positioning platform, and a plurality of vacuum adsorption holes communicated with the vacuum chamber are formed in the positioning plane.
8. The device for detecting the powder falling rate according to claim 7, wherein the wiping mechanism comprises a wiping cotton clamp, a lifting power module and a translation power module, wherein, The cotton wiping clamp is provided with a mounting plane, and is used for detachably mounting and fixing the white cotton wiping on the mounting plane and enabling the white cotton wiping to be located above the positioning plane; the lifting power module is in transmission connection with the cotton wiping clamp and is arranged to drive the cotton wiping clamp to perform lifting movement; the translation power module is in transmission connection with the cotton wiping clamp or the positioning platform, and the translation power module is arranged to drive the cotton wiping clamp or the positioning platform to perform translation motion.
9. The powder fall rate detection apparatus according to claim 8, wherein the lifting power module is further configured to press the white wiping cotton on the wiping cotton holder against the flexible graphite sheet on the positioning plane at a preset wiping pressure value, and/or, The translation power module is further arranged to control the frequency of the translational movement of the cotton wiping clamp or the positioning platform according to a preset wiping frequency, and control the duration of the translational movement of the cotton wiping clamp or the positioning platform according to a preset wiping duration.
10. The powder fall rate detection apparatus as claimed in any one of claims 6 to 9, further comprising an image recognition mechanism including an image recognition camera, an image processing module, and a display screen, the image processing module being electrically connected to the image recognition camera and the display screen, respectively, wherein, The image recognition camera is used for collecting the wiping surface color of the target wiping cotton; The image processing module is used for carrying out identification matching on the color of the wiping surface acquired by the image identification camera and a pre-stored gray scale so as to obtain the powder dropping rate of the flexible graphite plate; The display screen is arranged to output and display the powder dropping rate of the flexible graphite plate.

Description

Powder falling rate detection device and powder falling rate detection method for flexible graphite plate Technical Field The application relates to the technical field of fuel cells, in particular to a device and a method for detecting the powder dropping rate of a flexible graphite plate. Background Currently, bipolar plates of hydrogen fuel cells can be mainly classified into metal bipolar plates, rigid graphite machined plates and flexible graphite plates according to material characteristics. The flexible graphite sheet is mainly prepared from a graphite expansion sheet through the processes of compression molding, vacuum-pressurization infiltration, cleaning, solidification and the like, and the graphite expansion sheet is formed by rolling worm-shaped expanded graphite particles for multiple times, so that the flexible graphite sheet has a good conductive network but has a rough surface and is easy to fall off powder, and the flexible graphite sheet is modified by using high polymer resin in the preparation process so as to enhance the strength of a polar plate and the stability of expanded graphite worms, but the surface of a finished product of the flexible graphite sheet still has a certain fall-off phenomenon. In the production of the bipolar plates of the hydrogen fuel cell at present, an effective detection means is still lacking in detection of the surface powder dropping rate of the flexible graphite plates, so that certain flexible graphite plates with the exceeding powder dropping rate are still used in the preparation of the bipolar plates of the hydrogen fuel cell, and in the long-term operation process of the electric pile system of the hydrogen fuel cell, carbon powder which is flushed and dropped by gas on the bipolar plates can be accumulated along with the gas flow at the outlet position of the flow channel, so that the pressure drop of the electric pile system is steep, and the electric pile system cannot work normally. Disclosure of Invention The application aims to provide a powder falling rate detection device and a powder falling rate detection method for a flexible graphite plate, and aims to solve the problem that in the production of a hydrogen fuel cell bipolar plate at present, an effective detection means is lacking in detection of the surface powder falling rate of the flexible graphite plate, so that certain flexible graphite plates with the powder falling rate exceeding the standard are still used in the preparation of the hydrogen fuel cell bipolar plate, and a certain hidden danger is brought to the production of the hydrogen fuel cell bipolar plate. To achieve the object, an embodiment of the present application provides a method for detecting a powder falling rate of a flexible graphite sheet, the method comprising: providing a positioning plane, and flatly fixing the flexible graphite plate on the positioning plane; Providing white wiping cotton, and wiping the surface of the flexible graphite plate by using the white wiping cotton according to a preset mode to obtain target wiping cotton, wherein the target wiping cotton is the white wiping cotton which has wiped the surface of the flexible graphite plate; and obtaining the powder dropping rate of the flexible graphite plate according to the wiping surface color of the target wiping cotton. Optionally, in some embodiments of the present application, the fixing the flexible graphite sheet on the positioning plane includes: And the flexible graphite plate is flatly fixed on the positioning plane in a vacuum adsorption mode. Optionally, in some embodiments of the present application, after the wiping the surface of the flexible graphite sheet with the white wiping cotton in a preset manner, a target wiping cotton is obtained, including: And controlling the white wiping cotton to work according to a preset wiping pressure value, a preset wiping frequency and a preset wiping time length so as to wipe the surface of the flexible graphite plate and obtain the target wiping cotton. Optionally, in some embodiments of the present application, the obtaining the powder dropping rate of the flexible graphite sheet according to the wiping surface color of the target wiping cotton includes: And manually comparing the wiping surface color of the target wiping cotton with a preset gray card to obtain the powder dropping rate of the flexible graphite plate. Optionally, in some embodiments of the present application, the obtaining the powder dropping rate of the flexible graphite sheet according to the wiping surface color of the target wiping cotton includes: Providing an image recognition mechanism, collecting the wiping surface color of the target wiping cotton through the image recognition mechanism, and carrying out recognition matching on the wiping surface color of the target wiping cotton and a pre-stored gray scale to obtain the powder dropping rate of the flexible graphite plate. In addition, for achieving the purpose, the