CN111933976A - Bipolar plate of fuel cell - Google Patents
Bipolar plate of fuel cell Download PDFInfo
- Publication number
- CN111933976A CN111933976A CN202010845829.7A CN202010845829A CN111933976A CN 111933976 A CN111933976 A CN 111933976A CN 202010845829 A CN202010845829 A CN 202010845829A CN 111933976 A CN111933976 A CN 111933976A
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- conductive terminal
- fuel cell
- diameter end
- bipolar plate
- step groove
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04544—Voltage
- H01M8/04552—Voltage of the individual fuel cell
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M2004/8678—Inert electrodes with catalytic activity, e.g. for fuel cells characterised by the polarity
- H01M2004/8694—Bipolar electrodes
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Fuel Cell (AREA)
Abstract
The application relates to a fuel cell bipolar plate, which comprises a cathode plate and an anode plate which are jointed, wherein one end of the anode plate is provided with a step groove, and a conductive terminal matched with the step groove is arranged in the step groove; the step groove comprises a wide-diameter end and a narrow-diameter end which are integrally arranged, and the wide-diameter end is arranged on the inner side of the narrow-diameter end; the conductive terminal comprises a head end, a middle section and a tail end which are integrally arranged, the middle section is arranged between the head end and the tail end, the head end is arranged in the wide-diameter end, and the middle section penetrates through the narrow-diameter end and is exposed out of one end of the anode plate; and the geometric center of the tail end is provided with an opening connected with the inspection information line. The conductive terminal is fixed in the step groove of the anode plate, so that the conductive terminal can be prevented from falling off or generating poor contact due to vibration of working conditions, and the conductive terminal can be well used for monitoring the operation condition of the fuel cell in real time.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a bipolar plate of a fuel cell. The bipolar plate of the fuel cell fixes the conductive terminals in the step grooves of the bipolar plate, is convenient to install, firm in fixation and good in contact with the conductive terminals, can ensure the stability of voltage data acquisition, and can be used for well monitoring the operation condition of the fuel cell in real time.
Background
In the face of the increasingly strict exhaust emission standards in China and even in the world at present and the future energy crisis, various automobile manufacturers are developing low-emission new energy technologies to adapt to the development trend. The fuel cell is a new energy source with better development technical prospect, and is generally formed by overlapping and assembling dozens or hundreds of bipolar plates and a membrane electrode assembly, wherein one membrane electrode is clamped between the two bipolar plates to form a single cell, dozens or even hundreds of single cells are connected in series to form a complete cell stack, and the accumulation of the voltage of the single cells is the total voltage of the whole cell stack, so that the performance, safety and service life of the whole cell stack can be influenced by the performance of the single cells. Therefore, the voltage of a single battery is very necessary to be detected, the running state of the battery can be monitored in real time in the using process of the battery, the battery which is in trouble can be quickly and clearly known when the fault is maintained, and the fault can be quickly solved conveniently.
The detection method of the existing graphite bipolar plate galvanic pile is a mode of collecting signals through a connection polling system, the polling system collects the signals to detect and collects the battery voltage through a surface contact mode, poor contact easily occurs to the equipment, the conditions such as unstable voltage data collection and the like are collected, moreover, the automobile also easily leads to poor contact of the polling system due to frequent vibration in the driving process, therefore, the voltage of the battery galvanic pile monitored by the polling system is generally limited in the test process of the battery galvanic pile, the whole service life cycle of the fuel battery is difficult to monitor, and the method has great limitation.
Disclosure of Invention
The invention aims to provide a bipolar plate of a fuel cell. The bipolar plate of the fuel cell fixes the conductive terminals in the step grooves of the bipolar plate, is convenient to install, firm in fixation and good in contact with the conductive terminals, can ensure the stability of voltage data acquisition, and can be used for well monitoring the operation condition of the fuel cell in real time.
In order to achieve the above object, an embodiment of the present invention provides a fuel cell bipolar plate, including a cathode plate and an anode plate which are connected in an attaching manner, wherein one end of the anode plate is provided with a step groove, and a conductive terminal adapted to the step groove is arranged in the step groove; the step groove comprises a wide-diameter end and a narrow-diameter end which are integrally arranged, and the wide-diameter end is arranged on the inner side of the narrow-diameter end (the side close to the center of the anode plate is the inner side); the conductive terminal comprises a head end, a middle section and a tail end which are integrally arranged, the middle section is arranged between the head end and the tail end, the head end is arranged in the wide-diameter end, and the middle section penetrates through the narrow-diameter end and is exposed out of one end of the anode plate; and the geometric center of the tail end is provided with an opening connected with the inspection information line.
Furthermore, the conductive terminal is an elastic conductive terminal. Therefore, the conductive terminal can be placed in the step groove in a compressed state, and can be stably abutted in the step groove after being stretched and reset under the action of the elastic force of the conductive terminal.
Further, the width of the wide diameter end is greater than the width of the narrow diameter end. Therefore, the conductive terminal can be prevented from falling off from the stepped groove after being stretched and reset due to the elastic action of the conductive terminal, and the situation that the conductive terminal is in poor contact due to vibration of working conditions is avoided, so that the stability of collecting voltage data of the conductive terminal is ensured.
Further, when the conductive terminal is in a natural state (i.e., not compressed), the width of the wide end is smaller than that of the head end, and the width of the wide end is 0.1mm to 0.2 mm. Therefore, the head end of the conductive terminal can generate certain elastic deformation, and the head end can be more effectively attached and fixed in the wide-diameter end of the step groove, so that the conductive terminal is effectively prevented from falling off.
Further, when the conductive terminal is in a natural state (i.e. not compressed), one end of the head end, which is far away from the middle section, is arranged in an included angle, and the included angle is 10-30 degrees. Therefore, the head end forms a certain sharp angle by controlling the included angle, so that the conductive terminal can be conveniently inserted into the step groove, and the mounting efficiency is improved.
Further, when the conductive terminal is in a natural state (i.e., not compressed), one end of the head end close to the middle section is provided with two symmetrical obtuse angles, and the angle of the obtuse angle is 120-150 °. One end of the conductive terminal close to the middle section is arranged in an obtuse angle, so that the obtuse angle is relatively obtuse, and the conductive terminal can be prevented from falling off under the condition of vehicle-mounted working conditions; when the conductive terminal needs to be replaced, the conductive terminal can be detached by applying large external force by using a special tool, and the conductive terminal can be replaced quickly on the premise of not damaging the bipolar plate.
Further, when the conductive terminal is in a natural state (i.e., not compressed), the length of the wide end is greater than that of the head end, and the length of the wide end is 0.5mm to 0.6 mm. Therefore, the conductive terminal can have a certain deformation space.
Further, when the conductive terminal is in a natural state (i.e., not compressed), the length of the step groove is less than the sum of the lengths of the middle section and the head end. Therefore, the tail end of the conductive terminal can be exposed out of one end of the anode plate, and the inspection information wire is convenient to connect and fix.
Further, when the conductive terminal is in a natural state (i.e., not compressed), the width of the tail end is greater than the width of the middle section. The tail end is arranged outside one end of the anode plate, so that the inspection information line is convenient to connect and fix in installation.
Further, the head end and the middle section are both arranged in a hollow mode. Therefore, the weight of the conductive terminal can be reduced while the cost is reduced, and the assembly of the battery is facilitated.
Furthermore, the conductive terminal is made of copper, chromium and nickel alloy materials. The conductive terminal has high elasticity and good conductivity. The conductive terminal can be formed by adopting the alloy material in a punching way, and then the surface of the formed conductive terminal is subjected to rust-proof corrosion-resistant and conductive improvement treatment so as to prolong the service life of the conductive terminal.
The technical scheme provided by the invention has the following beneficial effects: the bipolar plate of the fuel cell fixes the conductive terminals in the step grooves of the anode plate, the conductive terminals enter the step grooves and can be stably abutted against the step grooves after being stretched and reset under the action of self elasticity, the situation that the conductive terminals are in poor contact due to vibration of working conditions is avoided, the conductive terminals are firmly fixed and are in good contact, and the stability of voltage data acquisition can be ensured. Compare in the mode of conventional surface contact collection voltage, simple structure, simple to operate of this application, reliable stable in the use, the operation condition who is used for real-time supervision fuel cell that can be fine.
Drawings
FIG. 1 is a schematic longitudinal cross-sectional view of a bipolar plate for a fuel cell according to an embodiment of the present invention;
FIG. 2 is a schematic longitudinal cross-sectional view of the cathode and anode plates of FIG. 1;
fig. 3 is a schematic longitudinal sectional view of the conductive terminal of fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
It should be noted that, if directional indications (such as up, down, left, right, front, back, top and bottom … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Generally, the existing detection method of the graphite bipolar plate galvanic pile is a mode of collecting signals by connecting an inspection system, the inspection system collects the voltages of batteries by surface contact, poor contact and unstable voltage data collection of the equipment are easy to occur, moreover, the automobile is easy to cause the poor contact of the inspection system due to frequent vibration in the driving process, and the galvanic pile is easy to loosen or even separate under the vehicle-mounted condition, so that the test information of the galvanic pile is wrong or lost when the galvanic pile is used. Therefore, the voltage of the fuel cell stack monitored by the inspection system is generally only limited in the test process of the fuel cell stack, the operation condition of the whole service life cycle of the fuel cell is difficult to monitor, and the inspection system has great limitation. Therefore, it is necessary to provide a bipolar plate for a fuel cell to solve the above technical problems.
As shown in fig. 1-3, an embodiment of the present invention provides a fuel cell bipolar plate, including a cathode plate 10 and an anode plate 20 which are attached to each other, wherein one end of the anode plate 20 is provided with a step groove 30, and a conductive terminal 40 adapted to the step groove 30 is arranged in the step groove 30; the step groove 30 comprises a wide-diameter end 31 and a narrow-diameter end 32 which are integrally arranged, wherein the wide-diameter end 31 is arranged at the inner side of the narrow-diameter end 32 (the side close to the center of the anode plate 20 is the inner side); the conductive terminal 40 includes a head end 41, a middle section 42, and a tail end 43, which are integrally disposed, the middle section 42 is disposed between the head end 41 and the tail end 43, the head end 41 is disposed in the wide diameter end 31, and the middle section 42 passes through the narrow diameter end 32 and is exposed out of one end of the anode plate 20; the geometric center of the tail end 43 is provided with an opening 431 connected with the routing inspection information line 50.
In this embodiment, the conductive terminals 40 are elastic conductive terminals. Therefore, the conductive terminal can be placed in the step groove in a compressed state, and can be stably abutted in the step groove after being stretched and reset under the action of the elastic force of the conductive terminal.
Generally, in this embodiment, the step groove 30 is disposed at one side of the anode plate 20 close to the cathode plate 10, one side of the step groove 30 close to the cathode plate 10 is horizontally disposed, and one side of the step groove 30 far away from the cathode plate 10 is arranged in a step shape.
It is understood that in other embodiments, the step groove 30 may be disposed on the side of the end of the anode plate 20 far from the cathode plate 10, or the step groove 30 may be disposed at the geometric center of the end of the anode plate 20, according to actual needs.
It should be noted that, in other embodiments, according to actual needs, the side of the stepped groove 30 close to the cathode plate is arranged in a step shape, and the side of the stepped groove 30 far from the cathode plate 10 is arranged horizontally.
It can be seen that, in this application, the position of setting up of step recess and the orientation mode of step recess can set up according to actual conditions, as long as can realize the scheme of this application can.
Further, referring to fig. 2 again, in the present embodiment, the width W1 of the wide end 31 is greater than the width W2 of the narrow end 32. Therefore, the conductive terminal can be prevented from falling off from the stepped groove after being stretched and reset due to the elastic action of the conductive terminal, and the situation that the conductive terminal is in poor contact due to vibration of working conditions is avoided, so that the stability of collecting voltage data of the conductive terminal is ensured.
Further, in the present embodiment, when the conductive terminal 40 is in a natural state (i.e., not compressed), the width W1 of the wide end 31 is smaller than the width W3 of the head end 41, and the width W1 of the wide end 31 is 0.1mm to 0.2 mm. Therefore, the head end of the conductive terminal can generate certain elastic deformation, and the head end can be more effectively attached and fixed in the wide-diameter end of the step groove, so that the conductive terminal is effectively prevented from falling off.
Further, as shown in fig. 3, in the present embodiment, when the conductive terminal 40 is in a natural state (i.e. when not compressed), an end of the head end 41 away from the middle section 42 forms an included angle, and the included angle θ is 10 ° to 30 °. Therefore, the head end forms a certain sharp angle by controlling the included angle, so that the conductive terminal can be conveniently inserted into the step groove, and the mounting efficiency is improved.
In the present embodiment, when the conductive terminal 40 is in a natural state (i.e., not compressed), one end of the head end 41 near the middle section 42 is provided with two symmetrical obtuse angles, and the angle of the obtuse angle is 120 ° to 150 °. One end of the conductive terminal close to the middle section is arranged in an obtuse angle, so that the obtuse angle is relatively obtuse, and the conductive terminal can be prevented from falling off under the condition of vehicle-mounted working conditions; when the conductive terminal needs to be replaced, the conductive terminal can be detached by applying large external force by using a special tool, and the conductive terminal can be replaced quickly on the premise of not damaging the bipolar plate.
Further, in the present embodiment, when the conductive terminal 40 is in a natural state (i.e., not compressed), the length L1 of the wide end 31 is greater than the length L2 of the head end 41, and the length L1 of the wide end 31 is 0.5mm to 0.6 mm. Therefore, the conductive terminal can have a certain deformation space.
It should be noted that, in the present embodiment, when the conductive terminal 40 is in a natural state (i.e., not compressed), the length L3 of the step groove 30 is smaller than the sum L4 of the lengths of the middle section 42 and the head end 41. Therefore, the tail end of the conductive terminal can be exposed out of one end of the anode plate, and the inspection information wire is convenient to connect and fix.
Further, in the present embodiment, when the conductive terminal 40 is in a natural state (i.e., not compressed), the width of the tail end 43 is greater than the width of the middle section 42. The tail end is arranged outside one end of the anode plate, so that the inspection information line is convenient to connect and fix in installation.
In this embodiment, the head end 41 and the middle section 42 are both hollow. Therefore, the weight of the conductive terminal can be reduced while the cost is reduced, and the assembly of the battery is facilitated.
Further, in the present embodiment, the conductive terminal 40 is a conductive terminal made of copper, chromium, and nickel alloy materials. The conductive terminal has high elasticity and good conductivity. The conductive terminal can be formed by adopting the alloy material in a punching way, and then the surface of the formed conductive terminal is subjected to rust-proof corrosion-resistant and conductive improvement treatment so as to prolong the service life of the conductive terminal.
Compared with the existing inspection system for acquiring the voltage signal of the battery through surface contact, the bipolar plate of the fuel battery fixes the conductive terminals in the step groove of the anode plate, the conductive terminals enter the step groove and can be stably abutted against the step groove after being stretched and reset under the action of self elasticity, the situation that the conductive terminals are in poor contact due to vibration of working conditions is avoided, the conductive terminals are firmly fixed and well contacted, and the stability of acquiring voltage data can be ensured. Compare in the mode of conventional surface contact collection voltage, simple structure, simple to operate of this application, reliable stable in the use, the operation condition who is used for real-time supervision fuel cell that can be fine. Meanwhile, the processing cost of each part in the bipolar plate is effectively reduced, and the production efficiency is improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A fuel cell bipolar plate is characterized by comprising a cathode plate and an anode plate which are jointed, wherein one end of the anode plate is provided with a step groove, and a conductive terminal matched with the step groove is arranged in the step groove; the step groove comprises a wide-diameter end and a narrow-diameter end which are integrally arranged, and the wide-diameter end is arranged on the inner side of the narrow-diameter end; the conductive terminal comprises a head end, a middle section and a tail end which are integrally arranged, the middle section is arranged between the head end and the tail end, the head end is arranged in the wide-diameter end, and the middle section penetrates through the narrow-diameter end and is exposed out of one end of the anode plate; and the geometric center of the tail end is provided with an opening connected with the inspection information line.
2. The fuel cell bipolar plate of claim 1, wherein the conductive terminals are resilient conductive terminals.
3. The fuel cell bipolar plate of claim 1, wherein the width of the wide diameter end is greater than the width of the narrow diameter end.
4. The fuel cell bipolar plate of claim 3, wherein the width of the wide diameter end is less than the width of the head end when the conductive terminal is in a natural state, and the width of the wide diameter end is 0.1mm to 0.2 mm.
5. The fuel cell bipolar plate of claim 1, wherein when the conductive terminals are in a natural state, an end of the head end away from the middle section is disposed at an included angle, and the included angle is 10 ° to 30 °.
6. The fuel cell bipolar plate of claim 1, wherein when the conductive terminal is in a natural state, one end of the head end near the middle section is provided with two symmetrical obtuse angles, and the angle of the obtuse angle is 120-150 °.
7. The fuel cell bipolar plate of claim 1, wherein the wide diameter end has a length greater than a length of the head end when the conductive terminal is in a natural state, the wide diameter end having a length of 0.5mm to 0.6 mm.
8. The fuel cell bipolar plate of claim 1, wherein the length of the step groove is less than the sum of the lengths of the middle section and the header when the conductive terminal is in a natural state.
9. The fuel cell bipolar plate of claim 1, wherein the width of the tail portion is greater than the width of the middle portion when the conductive terminal is in a natural state.
10. The fuel cell bipolar plate of claim 1, wherein the head end and the intermediate section are both hollow; the conductive terminal is made of copper, chromium and nickel alloy materials.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020107800516 | 2020-08-05 | ||
| CN202010780051 | 2020-08-05 |
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| Publication Number | Publication Date |
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| CN111933976A true CN111933976A (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010845829.7A Pending CN111933976A (en) | 2020-08-05 | 2020-08-20 | Bipolar plate of fuel cell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113793945A (en) * | 2021-08-30 | 2021-12-14 | 深圳深科鹏沃科技有限公司 | Bipolar plate mechanism and fuel cell system |
| CN114220998A (en) * | 2021-12-17 | 2022-03-22 | 上海重塑能源科技有限公司 | Voltage inspection plug-in, single cell with voltage inspection part and voltage inspection device |
| CN114267844A (en) * | 2021-11-09 | 2022-04-01 | 深圳市氢瑞燃料电池科技有限公司 | System and method for producing fuel cell polar plate |
-
2020
- 2020-08-20 CN CN202010845829.7A patent/CN111933976A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113793945A (en) * | 2021-08-30 | 2021-12-14 | 深圳深科鹏沃科技有限公司 | Bipolar plate mechanism and fuel cell system |
| CN114267844A (en) * | 2021-11-09 | 2022-04-01 | 深圳市氢瑞燃料电池科技有限公司 | System and method for producing fuel cell polar plate |
| CN114267844B (en) * | 2021-11-09 | 2024-02-27 | 深圳市氢瑞燃料电池科技有限公司 | System and method for producing fuel cell polar plate |
| CN114220998A (en) * | 2021-12-17 | 2022-03-22 | 上海重塑能源科技有限公司 | Voltage inspection plug-in, single cell with voltage inspection part and voltage inspection device |
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