CN215178450U - Detection apparatus for graphite bipolar plate runner crackle - Google Patents

Detection apparatus for graphite bipolar plate runner crackle Download PDF

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Publication number
CN215178450U
CN215178450U CN202121551689.9U CN202121551689U CN215178450U CN 215178450 U CN215178450 U CN 215178450U CN 202121551689 U CN202121551689 U CN 202121551689U CN 215178450 U CN215178450 U CN 215178450U
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Prior art keywords
bipolar plate
flow channel
graphite
plate
detection
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CN202121551689.9U
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吴世强
马君
杨海玉
李团锋
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Dongfang Electric Chengdu Hydrogen Fuel Cell Technology Co ltd
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Dongfang Electric Chengdu Hydrogen Fuel Cell Technology Co ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells

Abstract

The utility model discloses a detection apparatus for graphite bipolar plate runner crackle, including being used for carrying out airtight sealed subassembly of encapsulation and being used for carrying out the detecting element who detects to a plurality of runners of bipolar plate to bipolar plate, detecting element lets in by bipolar plate's corresponding runner one end opening the detection medium through the pipeline, the other end shutoff of corresponding runner be provided with the valves on the pipeline and be used for detecting the detection piece that bipolar plate revealed. The utility model discloses can effectively detect out the graphite cake of microcrack, avoid the defective products to flow into one process down, if lead to the cavity inside scurrying each other because of the graphite cake microcrack, can influence great with the pile product performance, if the graphite cake microcrack is discerned before the use and is examined out, just the rear end problem can not appear.

Description

Detection apparatus for graphite bipolar plate runner crackle
Technical Field
The utility model belongs to the technical field of fuel cell, in particular to detection apparatus for graphite bipolar plate runner crackle.
Background
With the rapid development of the fuel cell industry, the galvanic pile has higher requirements on the thickness of an important raw material graphite plate, wherein the thinning is a mode for improving the current density, but microcracks caused by thinning of the graphite plate are particularly obvious, statistics shows that 1 graphite plate microcrack exists in an average 110 graphite plates, and the more times of repeatedly disassembling and assembling the pile, the higher the probability of microcracks of the graphite plate.
In addition, from the product design, the graphite plate adopts the cathode and anode bonding process, and two sides of the graphite plate are provided with flow channels, so that microcracks generated in the flow channels under the action of external force cannot be detected and identified through appearance, other detection equipment is required to be adopted for screening, the cathode and anode graphite plate is cured by adopting a viscose glue or a glue dispensing process in the current market, and uncontrollable factors exist in the processes of glue dispensing, bonding, high-temperature curing and the like to cause the leakage of the bonded graphite plate.
SUMMERY OF THE UTILITY MODEL
The invention of the utility model aims to: aiming at the existing problems, the device for detecting the graphite bipolar plate runner cracks can effectively detect whether the graphite plate is micro-cracked or not.
The utility model adopts the technical proposal that: a detection device for graphite bipolar plate runner cracks is characterized in that: the detection unit is used for introducing a detection medium from an opening at one end of a corresponding flow channel of the bipolar plate through a pipeline, the other end of the corresponding flow channel is blocked, and a valve group and a detection piece for detecting leakage of the bipolar plate are arranged on the pipeline.
Detection device of graphite bipolar plate runner crackle, it seal assembly includes upper and lower transparent ya keli closing plate, bipolar plate sets up between upper and lower transparent ya keli closing plate, upper and lower transparent ya keli closing plate passes through screw seal locking, be provided with seal assembly between bipolar plate and the upper and lower transparent ya keli closing plate.
Detection device of graphite bipolar plate runner crackle, its bipolar plate includes oxygen runner, rivers way and hydrogen runner, detecting element detects each runner of bipolar plate respectively.
Detection device of graphite bipolar plate runner crackle, it detecting element divide into three reposition of redundant personnel pipeline, three reposition of redundant personnel pipeline communicate with bipolar plate's oxygen runner, water runner and hydrogen gas runner respectively, all is provided with valves and detection piece on every reposition of redundant personnel road.
Detection device of graphite bipolar plate runner crackle, its detecting element is including being used for providing the air supply or the water source that detect the medium, air supply or water source link to each other with three reposition of redundant personnel pipeline through the pipeline that is provided with the air-vent valve.
Detection device of graphite bipolar plate runner crackle, its valves on every shunt line is including the bleeder valve and the entry block valve that connect gradually, the detection piece sets up between the runner port of entry block valve and bipolar plate.
Detection device of graphite bipolar plate runner crackle, its the test piece is manometer or flowmeter.
Detection device of graphite bipolar plate runner crackle, its the runner other end of bipolar plate carries out the shutoff through the end cap.
The utility model has the advantages that:
(1) the utility model discloses can effectively detect out the graphite cake of microcrack, avoid the defective products to flow into one process down. If the graphite plate microcracks cause the inside of the cavity to jump up, the product performance and the galvanic pile are greatly influenced, and if the graphite plate microcracks are identified and detected before use, the rear end problem cannot occur.
(2) The utility model discloses can pinpoint the concrete position that the graphite cake crazes a little, the technique of being convenient for optimizes graphite cake runner design or graphite cake structural design.
(3) The utility model discloses can accurate detection graphite cake bonding position's leakage point, do benefit to negative and positive pole graphite cake bonding process and improve and optimize.
(4) The utility model discloses can control the pressure size and the flow size that detect the medium by oneself, reliable performance ability that can effectual aassessment graphite cake, like projects such as high temperature cold and hot impact, pressure size limit test.
Drawings
The invention will be described by way of example only and with reference to the accompanying drawings, in which
Fig. 1 is a schematic structural diagram of the present invention.
The labels in the figure are: 1 is a bipolar plate, 2 is a sealing component, 4 is a detection part, 5 is a plug, 11 is an oxygen flow channel, 12 is a water flow channel, 13 is a hydrogen flow channel, 31 is an air source or a water source, 32 is a pressure regulating valve, 33 is a pressure dividing valve and 34 is an inlet cut-off valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
As shown in fig. 1, a detection device for detecting cracks in a flow channel of a graphite bipolar plate comprises a sealing assembly 2 for hermetically sealing a bipolar plate 1 and a detection unit for detecting a plurality of flow channels of the bipolar plate 1, wherein the detection unit introduces a detection medium from an opening at one end of a corresponding flow channel of the bipolar plate 1 through a pipeline, the other end of the corresponding flow channel is blocked, a valve bank and a detection piece 4 for detecting leakage of the bipolar plate 1 are arranged on the pipeline, and when the detection medium is introduced into the corresponding flow channel, the flow channel is kept in a pressure maintaining state, and the detection piece is used for measuring, so as to determine whether leakage occurs. The whole gas circuit or water route design must guarantee that connecting line is sealed, so use corresponding cutting ferrule size to connect, accomplish overall structure equipment back, whether there is the leakage in pressurize pipeline alone.
Specifically, seal assembly 2 includes upper and lower transparent ya keli closing plate, bipolar plate 1 sets up between upper and lower transparent ya keli closing plate, upper and lower transparent ya keli closing plate passes through screw seal locking, be provided with seal assembly between bipolar plate 1 and the upper and lower transparent ya keli closing plate, and the regional coating of runner is partly water when sealing up the graphite cake, the specific leak point of clear observation of being convenient for, observe the graphite cake and leak the condition because of needs pressurization, so the flatness requirement to upper and lower transparent ya keli closing plate is higher, need guarantee within 0.01, upper and lower transparent ya keli closing plate adopts free not hard up with external connection, when testing different pipelines, can corresponding switching pipeline. The structure design of the bipolar plate sealing groove and the gas sealing ring meets the sealing requirement, and the smaller of the designed dimension has great influence on the test structure, so that the authenticity of the test can be influenced; when the acrylic plate and the bipolar plate are tested, a screw sealing and locking device with the same torque must be used, the influence of leakage caused by non-locking on a test result is avoided, and the damage to the bipolar plate caused by overlarge locking force is avoided.
In this embodiment, the bipolar plate 1 includes an oxygen flow channel 11, a water flow channel 12, and a hydrogen flow channel 13, the detection unit respectively detects each flow channel of the bipolar plate 1, wherein the detection unit is divided into three shunt pipelines, the three shunt pipelines are respectively communicated with the oxygen flow channel 11, the water flow channel 12, and the hydrogen flow channel 13 of the bipolar plate 1, a valve set and a detection component 4 are disposed on each shunt pipeline, the detection unit includes an air source or a water source 31 for providing a detection medium, the air source or the water source 31 is connected to the three shunt pipelines through a pipeline provided with a pressure regulating valve 32, and the air flow and the water flow are respectively controlled separately. Like this, can once can inspect the three runner of graphite cake and leak or the graphite cake microcrack internal leakage condition to but the clear observation leakage position and leak the leakage quantity, but the check out test set can be one set of multi-purpose moreover, can use the air supply to carry out pressure test, also can use the water source to carry out the water pressure test.
Specifically, the valve group on each shunt pipeline comprises a partial pressure valve 33 and an inlet cut-off valve 34 which are connected in sequence, the pressure regulating valve controls three partial pressure valve pipelines, so the pressure gauge range of the pressure regulating valve is designed to be higher than that of the partial pressure valves, the air source or water source pressure and the container are designed to ensure that the pressure is greater than the total process pressure or total flow required by the rear end, the detection piece 4 is arranged between the inlet cut-off valve 34 and the flow channel port of the bipolar plate 1, the detection piece 4 is a pressure gauge or a flowmeter, when the detection piece is a pressure gauge, the pressure drop method is adopted to measure leakage, when the detection piece is a flow meter, the flow method is adopted to test, the other end of the flow channel of the bipolar plate 1 is plugged by a plug 5, once a single channel or a plurality of channels are detected independently, the partial pressure valve and the inlet cut-off valve of the corresponding pipeline are controlled respectively, and the utilization rate of the detection equipment is high, and the reliability of the graphite plate design can be evaluated according to the flow and air pressure control, and data support is provided for the graphite plate flow channel design, the gluing process and the like.
The utility model discloses a theory of operation is:
(1) when the three-cavity test is carried out, the total pressure regulating valve and the three partial pressure valves are opened, the corresponding pressure gauge values are adjusted, and the inlet stop valves are completely shut off after the air pressure is stabilized.
The judging method comprises the following steps: and (4) observing the drop value of the pressure gauge and observing the leakage point of the graphite plate, wherein the leakage of the graphite plate is accompanied with the bubbling.
(2) When the water cavity is tested, the total pressure regulating valve and the pressure dividing valve corresponding to the water flow channel are opened, the corresponding pressure gauge value is adjusted, and the inlet stop valve corresponding to the water flow channel is turned off after the air pressure is stabilized.
The judging method comprises the following steps: and (4) observing the drop value of the pressure gauge and observing the leakage point of the graphite plate, wherein the leakage of the graphite plate is accompanied with the bubbling.
(3) When the oxyhydrogen chamber is tested, the total pressure regulating valve and the pressure dividing valve corresponding to the oxyhydrogen flow channel are opened, the corresponding pressure gauge value is adjusted, and the inlet stop valve corresponding to the oxyhydrogen flow channel is closed after the air pressure is stabilized.
The judging method comprises the following steps: the leakage point is the leakage point by observing the pressure gauge drop value and the graphite plate, and the leakage of the graphite plate is accompanied with the bubbling.
The invention is not limited to the specific embodiments described above, but extends to any novel feature or any novel combination of features disclosed herein, or to any novel method or process steps or any novel combination of steps disclosed herein.

Claims (8)

1. A detection device for graphite bipolar plate runner cracks is characterized in that: the detection device comprises a sealing assembly (2) for sealing and packaging the bipolar plate (1) and a detection unit for detecting a plurality of flow channels of the bipolar plate (1), wherein the detection unit is used for introducing a detection medium from one end opening of the corresponding flow channel of the bipolar plate (1) through a pipeline, the other end of the corresponding flow channel is blocked, and a valve bank and a detection piece (4) for detecting leakage of the bipolar plate (1) are arranged on the pipeline.
2. The apparatus for detecting cracks in a flow channel of a graphite bipolar plate according to claim 1, wherein: the sealing assembly (2) comprises an upper transparent acrylic sealing plate and a lower transparent acrylic sealing plate, the bipolar plate (1) is arranged between the upper transparent acrylic sealing plate and the lower transparent acrylic sealing plate, the upper transparent acrylic sealing plate and the lower transparent acrylic sealing plate are locked through screw sealing, and the sealing assembly is arranged between the bipolar plate (1) and the upper transparent acrylic sealing plate and the lower transparent acrylic sealing plate.
3. The apparatus for detecting cracks in a flow channel of a graphite bipolar plate according to claim 1, wherein: the bipolar plate (1) comprises an oxygen flow channel (11), a water flow channel (12) and a hydrogen flow channel (13), and the detection unit is used for detecting each flow channel of the bipolar plate (1) respectively.
4. The apparatus for detecting cracks in the flow channels of the graphite bipolar plate as claimed in claim 3, wherein: the detection unit is divided into three shunt pipelines which are respectively communicated with an oxygen flow channel (11), a water flow channel (12) and a hydrogen flow channel (13) of the bipolar plate (1), and each shunt pipeline is provided with a valve group and a detection part (4).
5. The apparatus for detecting cracks in the flow channels of the graphite bipolar plate as claimed in claim 4, wherein: the detection unit comprises an air source or water source (31) for providing detection media, and the air source or water source (31) is connected with the three shunt pipelines through a pipeline provided with a pressure regulating valve (32).
6. The apparatus for detecting cracks in flow channels of a graphite bipolar plate according to claim 5, wherein: the valve group on each shunt pipeline comprises a shunt valve (33) and an inlet block valve (34) which are connected in sequence, and the detection piece (4) is arranged between the inlet block valve (34) and the flow channel port of the bipolar plate (1).
7. The apparatus for detecting cracks in the flow channels of the graphite bipolar plate as claimed in claim 6, wherein: the detection piece (4) is a pressure gauge or a flowmeter.
8. The apparatus for detecting cracks in the flow channels of the graphite bipolar plate as claimed in claim 6, wherein: the other end of the flow channel of the bipolar plate (1) is plugged by a plug (5).
CN202121551689.9U 2021-07-08 2021-07-08 Detection apparatus for graphite bipolar plate runner crackle Active CN215178450U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121551689.9U CN215178450U (en) 2021-07-08 2021-07-08 Detection apparatus for graphite bipolar plate runner crackle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121551689.9U CN215178450U (en) 2021-07-08 2021-07-08 Detection apparatus for graphite bipolar plate runner crackle

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114323466A (en) * 2021-12-30 2022-04-12 新源动力股份有限公司 Fuel cell bipolar plate leakage detection device and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114323466A (en) * 2021-12-30 2022-04-12 新源动力股份有限公司 Fuel cell bipolar plate leakage detection device and method

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