Bipolar plate for fuel cell and fuel cell

Abstract

The present disclosure discloses a bipolar plate of a fuel cell and a fuel cell, and relates to the field of fuel cells. The bipolar plate includes a first plate and a second plate, both of which have openings, and an annular cavity with corresponding openings is formed between the first plate and the second plate, the annular cavity surrounds the corresponding openings and communicates with the corresponding openings, the first plate has a first sealing glue line accommodating groove, the second plate has a second sealing glue line accommodating groove, and the annular cavity has a plurality of supporting structures, the orthographic projections of the plurality of supporting structures on the first plate are located in the first sealing glue line accommodating groove, and the orthographic projections of the second sealing glue line accommodating groove on the first plate coincide with the first sealing glue line accommodating groove. When the bipolar plate is pressed, pressure is transmitted on the sealing glue line and the supporting structure, and the pressures of the sealing glue lines on the first plate and the second plate are collinear, and the pressure can act evenly on the sealing glue line, thereby avoiding the problem of reduced sealing performance caused by uneven force on the sealing glue line for a long time.

Description

Technical Field

[0001] The present disclosure relates to the field of fuel cells, and in particular to a bipolar plate of a fuel cell and a fuel cell. Background Art

[0002] A fuel cell is a chemical device that converts the chemical energy of a fuel directly into electrical energy. It is the fourth power generation technology after hydropower, thermal power generation and nuclear power generation.

[0003] Bipolar plates are important structures in fuel cells. In fuel cells, they usually include multiple groups of stacked bipolar plates, each group of bipolar plates includes a cathode plate and an anode plate, and the cathode plate and the anode plate overlap each other. A membrane electrode is sandwiched between two adjacent groups of bipolar plates. Sealant line receiving grooves are provided on both the cathode plate and the anode plate, in which sealant lines are provided. In the same bipolar plate, the sealant line receiving groove on the cathode plate and the sealant line receiving groove on the anode plate are staggered.

[0004] In a fuel cell, when multiple sets of bipolar plates are stacked, they are compressed with a relatively high pressure to form a seal between the sealant line and the membrane electrode. Since the sealant line receiving grooves on the cathode plate and the sealant line receiving grooves on the anode plate are staggered, the sealant line is also staggered, so that when under pressure, the pressure on the sealant line on the cathode plate and the pressure on the sealant line on the anode plate are not in the same line, resulting in uneven force on the sealant line. After a long time, the sealing performance of the sealant line is likely to decrease, and there is a risk of leakage. Summary of the invention

[0005] The embodiment of the present disclosure provides a bipolar plate of a fuel cell and a fuel cell, which can improve the sealing performance of the sealing rubber line. The technical solution is as follows:

[0006] On the one hand, an embodiment of the present disclosure provides a bipolar plate for a fuel cell, comprising a first electrode plate and a second electrode plate overlapping each other, one of the first electrode plate and the second electrode plate being a cathode plate and the other being an anode plate, the first electrode plate and the second electrode plate both having a plurality of openings, the plurality of openings comprising at least one of an oxidant inlet, a fuel inlet, a coolant inlet, an oxidant outlet, a fuel outlet, and a coolant outlet, the first electrode plate and the second electrode plate both having opposite first and second surfaces, an annular cavity corresponding to the opening is formed between the first surface of the first electrode plate and the first surface of the second electrode plate, the annular cavity surrounds the corresponding opening and communicates with the corresponding opening, the second surface of the first electrode plate has a first sealant line receiving groove extending along the annular cavity, the second surface of the second electrode plate has a second sealant line receiving groove extending along the annular cavity, the annular cavity has a plurality of support structures, the plurality of support structures are spaced around the opening, the plurality of support structures are supported between the first electrode plate and the second electrode plate, the orthographic projections of the plurality of support structures on the first electrode plate are located in the first sealant line receiving groove, and the orthographic projections of the second sealant line receiving groove on the first electrode plate coincide with the first sealant line receiving groove.

[0007] Optionally, the plurality of supporting structures include a plurality of first stamping protrusions formed by the bottom of the first sealant line receiving groove, and end surfaces of the plurality of first stamping protrusions are in contact with the second electrode plate.

[0008] Optionally, the multiple supporting structures include a plurality of first stamping protrusions formed by the bottom of the first sealant line accommodating groove and a plurality of second stamping protrusions formed by the bottom of the second sealant line accommodating groove, the end faces of the plurality of first stamping protrusions are all in contact with the second electrode plate, the end faces of the plurality of second stamping protrusions are all in contact with the first electrode plate, and the plurality of first stamping protrusions and the plurality of second stamping protrusions are alternately spaced along the annular cavity.

[0009] Optionally, each of the supporting structures includes a first stamping protrusion formed by the bottom of the first sealant line accommodating groove and a second stamping protrusion formed by the bottom of the second sealant line accommodating groove, the first stamping protrusion and the second stamping protrusion are arranged one-to-one, and the end face of the first stamping protrusion is in contact with the corresponding end face of the second stamping protrusion.

[0010] Optionally, the first stamping protrusion and the second stamping protrusion have the same height.

[0011] Optionally, a sealant line is disposed in both the first sealant line accommodating groove and the second sealant line accommodating groove.

[0012] Optionally, at least the sealant line located in the first sealant line accommodating groove has a plurality of protrusions, the protrusions of the sealant line located in the first sealant line accommodating groove correspond one-to-one to the first stamping protrusions, and the protrusions are located in the corresponding first stamping protrusions.

[0013] Optionally, the sealant line is injection molded in the first sealant line accommodating groove.

[0014] Optionally, the support structure is cylindrical, elliptical or prism-shaped.

[0015] On the other hand, an embodiment of the present disclosure further provides a fuel cell, comprising the bipolar plate as described in the previous aspect.

[0016] The beneficial effects brought by the technical solution provided by the embodiments of the present disclosure include at least:

[0017] By arranging a support structure in the annular cavity, the support structure is supported between the first electrode plate and the second electrode plate, so that pressure can be transmitted through the support structure. The first electrode plate has a first sealant line accommodating groove, and the second electrode plate has a second sealant line accommodating groove. Since the orthographic projection of the second sealant line accommodating groove on the first electrode plate coincides with the first sealant line accommodating groove, the sealant lines on the first electrode plate and the second electrode plate can overlap when arranging the sealant lines. And the orthographic projection of the support structure on the first electrode plate is located in the first sealant line accommodating groove, so that in the fuel cell, when the bipolar plate is pressed, the pressure is transmitted on the sealant line and the support structure, and the pressure of the sealant line on the first electrode plate and the sealant line on the second electrode plate are in the same line, and the pressure can act evenly on the sealant line, avoiding the problem of reduced sealing performance caused by uneven force on the sealant line for a long time, and improving the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural schematic diagram of a bipolar plate of a fuel cell in the related art;

[0020] Figure 2 yes Figure 1 AA cross section in;

[0021] Figure 3 is a schematic structural diagram of a bipolar plate of a fuel cell provided in an embodiment of the present disclosure;

[0022] Figure 4 yes Figure 3 A`-A` cross section in;

[0023] Figure 5 is a partial structural schematic diagram of another bipolar plate provided in an embodiment of the present disclosure;

[0024] Figure 6 is a partial structural schematic diagram of another bipolar plate provided in an embodiment of the present disclosure;

[0025] Figure 7 It is a schematic diagram of the partial structure of a bipolar plate provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the structure of a bipolar plate of a fuel cell in the related art. Figure 2 yes Figure 1 AA cross-section diagram in. Combined Figure 1 and Figure 2 As shown, the bipolar plate includes a first electrode plate 11 and a second electrode plate 12 that overlap each other. The first electrode plate 11 can be one of the cathode plate and the anode plate, and the second electrode plate 12 is the other of the cathode plate and the anode plate. The middle of the first electrode plate 11 and the second electrode plate 12 is a flow channel area B, and the flow channel area B is distributed with fluid channels. At both ends of the flow channel area B are the inlet and outlet areas of the fuel, oxidant and coolant, and there are openings in this area, including an oxidant inlet D, a fuel inlet E, a coolant inlet F, an oxidant outlet d, a fuel outlet e, and a coolant outlet f.

[0028] The first electrode plate 11 and the second electrode plate 12 both have opposite first and second surfaces, and an annular cavity 10a with corresponding openings is formed between the first surface of the first electrode plate 11 and the first surface of the second electrode plate 12, and the annular cavity 10a surrounds the corresponding opening and communicates with the corresponding opening. The second surface of the first electrode plate 11 has a first sealant line accommodating groove 11a extending along the annular cavity 10a, and the second surface of the second electrode plate 12 has a second sealant line accommodating groove 12a extending along the annular cavity 10a. The first sealant line accommodating groove 11a and the second sealant line accommodating groove 12a are staggered. This makes the sealant lines 20 arranged in the first sealant line accommodating groove 11a and the second sealant line accommodating groove 12a also staggered, as shown in FIG. Figure 2As shown, the pressure F of the two sealant lines 20 is not collinear, the pressure cannot be evenly transmitted between the sealant lines 20, and the sealant lines 20 are unevenly stressed. When under pressure for a long time, the sealing performance of the sealant lines 20 will decrease, and there is a risk of leakage. In addition, the sealant lines 20 on the first electrode plate 11 and the second electrode plate 12 are subjected to different forces, and they also need to be designed separately to ensure the sealing performance, which is difficult and costly to design.

[0029] Figure 3 It is a schematic structural diagram of a bipolar plate of a fuel cell provided in an embodiment of the present disclosure. Figure 4 yes Figure 3 A`-A` cross section diagram in. Figure 3 and 4 As shown, the bipolar plate includes a first electrode plate 11 and a second electrode plate 12 overlapping each other. One of the first electrode plate 11 and the second electrode plate 12 is a cathode plate, and the other is an anode plate. The present disclosure does not specifically limit whether the first electrode plate 11 is a cathode plate or an anode plate.

[0030] The first electrode plate 11 and the second electrode plate 12 both have a plurality of openings C, which include at least one of an oxidant inlet D, a fuel inlet E, a coolant inlet F, an oxidant outlet d, a fuel outlet e, and a coolant outlet f. The present disclosure takes the opening C as the oxidant inlet D as an example.

[0031] The first electrode plate 11 and the second electrode plate 12 each have a first surface and a second surface opposite to each other. An annular cavity 10a corresponding to the opening C is formed between the first surface of the first electrode plate 11 and the first surface of the second electrode plate 12, and the annular cavity 10a surrounds the corresponding opening C and communicates with the corresponding opening C. The second surface of the first electrode plate 11 has a first sealant line receiving groove 11a extending along the annular cavity 10a, and the second surface of the second electrode plate 12 has a second sealant line receiving groove 12a extending along the annular cavity 10a.

[0032] like Figure 4 As shown, the annular cavity 10a has a plurality of support structures 30, which are spaced around the opening C, and are supported between the first electrode plate 11 and the second electrode plate 12. The orthographic projections of the plurality of support structures 30 on the first electrode plate 11 are located in the first sealant line receiving groove 11a, and the orthographic projections of the second sealant line receiving groove 12a on the first electrode plate 11 coincide with the first sealant line receiving groove 11a.

[0033] By arranging a support structure in the annular cavity, the support structure is supported between the first electrode plate and the second electrode plate, so that pressure can be transmitted through the support structure. The first electrode plate has a first sealant line accommodating groove, and the second electrode plate has a second sealant line accommodating groove. Since the orthographic projection of the second sealant line accommodating groove on the first electrode plate coincides with the first sealant line accommodating groove, the sealant lines on the first electrode plate and the second electrode plate can overlap when arranging the sealant lines. And the orthographic projection of the support structure on the first electrode plate is located in the first sealant line accommodating groove, so that in the fuel cell, when the bipolar plate is pressed, the pressure is transmitted on the sealant line and the support structure, and the pressure of the sealant line on the first electrode plate and the sealant line on the second electrode plate are in the same line, and the pressure can act evenly on the sealant line, avoiding the problem of reduced sealing performance caused by uneven force on the sealant line for a long time, and improving the sealing performance.

[0034] like Figure 4 As shown, each support structure 30 may include a first stamping protrusion 31 formed by the bottom of the first sealant line receiving groove 11a and a second stamping protrusion 32 formed by the bottom of the second sealant line receiving groove 12a. The first stamping protrusion 31 and the second stamping protrusion 32 are arranged one by one, and the end surface of the first stamping protrusion 31 contacts the end surface of the corresponding second stamping protrusion 32. That is, a first stamping protrusion 31 and a second stamping protrusion 32 arranged correspondingly constitute a support structure 30. The first electrode plate 11 has a plurality of first stamping protrusions 31, and the second electrode plate 12 has a plurality of second stamping protrusions 32. Usually, the cathode plate and the anode plate are both made by stamping metal plates. The first stamping protrusions 31 are formed by the bottom of the first sealant line receiving groove 11a, and the second stamping protrusions 32 are formed by the bottom of the second sealant line receiving groove 12a. When the first electrode plate 11 is stamped, the first stamping protrusions 31 can be stamped out at the same time, and when the second electrode plate 12 is stamped, the second stamping protrusions 32 can be stamped out at the same time, which is convenient for manufacturing and mass production of bipolar plates. In addition, the end face of the first stamping protrusion 31 is in contact with the end face of the corresponding second stamping protrusion 32, and the first stamping protrusion 31 and the second stamping protrusion 32 are superimposed to play a supporting role together. The heights of the first stamping protrusion 31 and the second stamping protrusion 32 are both small, which is convenient for stamping and forming, and it is not easy to produce defective products during the stamping process.

[0035] Optionally, the sum of the heights of the first stamping protrusion 31 and the second stamping protrusion 32 can be 0.1mm~0.6mm. If the sum of the heights of the first stamping protrusion 31 and the second stamping protrusion 32 is too large, it will increase the process difficulty. If the sum of the heights is too small, it will affect the flow of the medium in the annular cavity 10a. The medium here can be any one of an oxidant, fuel, and coolant.

[0036] like Figure 4As shown, the height h of the first stamping protrusion 31 and the second stamping protrusion 32 can be the same. When stamping the first stamping protrusion 31 and the second stamping protrusion 32, the stamping stroke is the same, and the difficulty of stamping the first electrode plate 11 and the second electrode plate 12 is similar, so that the product quality of the first electrode plate 11 and the second electrode plate 12 is similar.

[0037] Figure 5 It is a schematic diagram of the partial structure of another bipolar plate provided in an embodiment of the present disclosure. Figure 5 The parts shown are Figure 3 The position shown in the M-direction view is the same as that shown in FIG. Figure 5 In order to distinguish the first stamping protrusion 31 from the second stamping protrusion 32, the first electrode plate 11 and the second electrode plate 12 are slightly separated. Figure 5 As shown, in the bipolar plate, the plurality of support structures 30 may include a plurality of first stamping protrusions 31 formed by the bottom of the first sealant line receiving groove 11a and a plurality of second stamping protrusions 32 formed by the bottom of the second sealant line receiving groove 12a. The end faces of the plurality of first stamping protrusions 31 are in contact with the second electrode plate 12, and the end faces of the plurality of second stamping protrusions 32 are in contact with the first electrode plate 11. The plurality of first stamping protrusions 31 and the plurality of second stamping protrusions 32 are alternately spaced along the annular cavity 10a. When the height of the support structure 30 is the same, compared with Figure 4 The bipolar plate shown, Figure 5 The heights of the first stamping protrusion 31 and the second stamping protrusion 32 are higher. However, under the same supporting effect, Figure 5 The number of the first stamping protrusions 31 on the first electrode plate 11 may be less than Figure 4 The number of the first stamping protrusions 31 on the first electrode plate 11, Figure 5 The number of the second stamping protrusions 32 on the second electrode plate 12 may be less than Figure 4 The number of the second stamping protrusions 32 on the second electrode plate 12 is determined.

[0038] Figure 6 It is a schematic diagram of the partial structure of another bipolar plate provided in an embodiment of the present disclosure. Figure 6 The parts shown are Figure 3 The position shown in the M-direction view is the same as that shown in FIG. Figure 6 In order to facilitate viewing of the first stamping protrusion 31, the first electrode plate 11 and the second electrode plate 12 are slightly separated. Figure 6As shown, in the bipolar plate, the plurality of support structures 30 may include a plurality of first stamping protrusions 31 formed by the bottom of the first sealant line receiving groove 11a, and the end faces of the plurality of first stamping protrusions 31 are in contact with the second electrode plate 12. In this way, when manufacturing the first electrode plate 11 and the second electrode plate 12, the first stamping protrusions 31 may be stamped only on the first electrode plate 11, and there is no need to form stamping protrusions on the second electrode plate 12. Therefore, there is no need to change the stamping equipment for manufacturing the second electrode plate 12, which is conducive to reducing the cost of the stamping equipment.

[0039] Optionally, the support structure 30 may be cylindrical, elliptical or prism-shaped. The shape of the support structure 30 may be set according to different needs. The support structure 30 may preferably be cylindrical or elliptical. Compared with the prism, the cylindrical and elliptical shapes are easier to be stamped and are not easily damaged during the stamping process.

[0040] like Figure 4 As shown, the thickness m of the first electrode plate 11 and the second electrode plate 12 can be 0.1 mm to 0.3 mm. If the thickness of the first electrode plate 11 and the second electrode plate 12 is too thin, it will affect the structural strength of the bipolar plate. If the thickness is too thick, it will be inconvenient for stamping and will greatly increase the weight of the fuel cell. Generally, a steel plate with a thickness of 0.1 mm to 0.3 mm can be selected to stamp the first electrode plate 11 and the second electrode plate 12.

[0041] Sealant lines 20 may be provided in both the first sealant line receiving groove 11a and the second sealant line receiving groove 12a. When manufacturing a fuel cell and stacking multiple sets of bipolar plates, sealant lines 20 need to be provided in the first sealant line receiving groove 11a and the second sealant line receiving groove 12a. A membrane electrode is also sandwiched between the two sets of bipolar plates. After pressurization, a seal is formed between the sealant line 20 and the membrane electrode. The upper sealant line 20 is first provided in the first sealant line receiving groove 11a and the second sealant line receiving groove 12a to facilitate the subsequent assembly of the fuel cell.

[0042] The width of the sealant line 20 can be smaller than the width of the first sealant line accommodating groove 11a, and the width of the sealant line 20 is also smaller than the width of the second sealant line accommodating groove 12a. This is because the sealant line 20 will produce a certain deformation after pressurization, so the width of the sealant line 20 is set smaller than the width of the groove. When the sealant line 20 is deformed, the sealant line 20 can have space to deform in the first sealant line accommodating groove 11a and the second sealant line accommodating groove 12a, avoiding the sealant line 20 from breaking and failing due to excessive pressure.

[0043] Figure 7 Schematic diagram of a partial structure of a bipolar plate provided by an embodiment of the present disclosure. Figure 7As shown, the sealant line 20 located in the first sealant line receiving groove 11a can have a plurality of protrusions 21, and the protrusions 21 of the sealant line 20 located in the first sealant line receiving groove 11a correspond to the first stamping protrusions 31 one by one, and the protrusions 21 are located in the corresponding first stamping protrusions 31. By providing the protrusions 21, and the protrusions 21 are located in the first stamping protrusions 31, the contact area between the sealant line 20 and the first sealant line receiving groove 11a can be increased, so that the sealant line 20 can be installed more firmly.

[0044] The shape of the protrusion 21 may be the same as that of the first stamping protrusion 31 , so that the protrusion 21 can be completely fitted with the inner wall of the first stamping protrusion 31 .

[0045] for Figure 4 and Figure 5 In the bipolar plate shown, the first electrode plate 11 has a first stamping protrusion 31, and the second electrode plate 12 has a second stamping protrusion 32. The sealant line 20 located in the second sealant line receiving groove 12a may also have a plurality of protrusions 21, and the protrusions 21 of the sealant line 20 located in the second sealant line receiving groove 12a correspond to the second stamping protrusions 32 one by one, and the protrusions 21 are located in the corresponding second stamping protrusions 32. Similarly, this can increase the contact area between the sealant line 20 and the second sealant line receiving groove 12a, so that the sealant line 20 is installed more firmly.

[0046] Optionally, the sealant line 20 can be injection molded in the first sealant line receiving groove 11a. The sealant line 20 located in the first sealant line receiving groove 11a is directly formed on the first electrode 11 by injection molding, which not only makes the sealant line 20 more tightly combined with the first electrode 11, but also can directly form the bump 21 in the first stamping protrusion 31. The sealant line 20 located in the second sealant line receiving groove 12a can also be formed on the second electrode 12 by injection molding.

[0047] In a possible implementation of the present disclosure, the sealant line 20 located in the first sealant line receiving groove 11a can also be bonded to the first electrode 11, and the sealant line 20 located in the second sealant line receiving groove 12a can also be bonded to the second electrode 12. The sealant line 20 can be prepared in advance and then bonded with an adhesive, and the process is simple.

[0048] The present disclosure also provides a fuel cell, which includes: Figure 3 to Figure 7 Any of the bipolar plates shown.

[0049] By arranging a support structure in the annular cavity, the support structure is supported between the first electrode plate and the second electrode plate, so that pressure can be transmitted through the support structure. The first electrode plate has a first sealant line accommodating groove, and the second electrode plate has a second sealant line accommodating groove. Since the orthographic projection of the second sealant line accommodating groove on the first electrode plate coincides with the first sealant line accommodating groove, the sealant lines on the first electrode plate and the second electrode plate can overlap when arranging the sealant lines. And the orthographic projection of the support structure on the first electrode plate is located in the first sealant line accommodating groove, so that in the fuel cell, when the bipolar plate is pressed, the pressure is transmitted on the sealant line and the support structure, and the pressure of the sealant line on the first electrode plate and the sealant line on the second electrode plate are in the same line, and the pressure can act evenly on the sealant line, avoiding the problem of reduced sealing performance caused by uneven force on the sealant line for a long time, and improving the sealing performance.

[0050] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A bipolar plate for a fuel cell, comprising a first electrode plate (11) and a second electrode plate (12) overlapping each other, wherein one of the first electrode plate (11) and the second electrode plate (12) is a cathode plate and the other is an anode plate, and the first electrode plate (11) and the second electrode plate (12) each have a plurality of openings (C), wherein the plurality of openings (C) include at least one of an oxidant inlet (D), a fuel inlet (E), a coolant inlet (F), an oxidant outlet (d), a fuel outlet (e), and a coolant outlet (f), and the first electrode plate (11) and the second electrode plate (12) each have There are a first surface and a second surface opposite to each other, an annular cavity (10a) corresponding to the opening (C) is formed between the first surface of the first electrode plate (11) and the first surface of the second electrode plate (12), the annular cavity (10a) surrounds the corresponding opening (C) and communicates with the corresponding opening (C), the second surface of the first electrode plate (11) has a first sealing glue line accommodating groove (11a) extending along the annular cavity (10a), and the second surface of the second electrode plate (12) has a second sealing glue line accommodating groove (12a) extending along the annular cavity (10a), characterized in that: The annular cavity (10a) has a plurality of support structures (30), the plurality of support structures (30) are spaced around the opening (C), the plurality of support structures (30) are supported between the first electrode plate (11) and the second electrode plate (12), the orthographic projections of the plurality of support structures (30) on the first electrode plate (11) are located in the first sealant line receiving groove (11a), and the orthographic projection of the second sealant line receiving groove (12a) on the first electrode plate (11) coincides with the first sealant line receiving groove (11a).

2. The bipolar plate according to claim 1, characterized in that: The plurality of support structures (30) include a plurality of first stamping protrusions (31) formed by the bottom of the first sealant line receiving groove (11a), and the end surfaces of the plurality of first stamping protrusions (31) are in contact with the second electrode plate (12).

3. The bipolar plate according to claim 1, characterized in that: The multiple support structures (30) include multiple first stamped protrusions (31) formed by the bottom of the first sealant line accommodating groove (11a) and multiple second stamped protrusions (32) formed by the bottom of the second sealant line accommodating groove (12a), the end faces of the multiple first stamped protrusions (31) are in contact with the second electrode plate (12), the end faces of the multiple second stamped protrusions (32) are in contact with the first electrode plate (11), and the multiple first stamped protrusions (31) and the multiple second stamped protrusions (32) are alternately distributed along the annular cavity (10a).

4. The bipolar plate according to claim 1, characterized in that: Each of the supporting structures (30) comprises a first stamping protrusion (31) formed by the bottom of the first sealant line receiving groove (11a) and a second stamping protrusion (32) formed by the bottom of the second sealant line receiving groove (12a), the first stamping protrusion (31) and the second stamping protrusion (32) being arranged in one-to-one correspondence, and the end face of the first stamping protrusion (31) is in contact with the corresponding end face of the second stamping protrusion (32).

5. The bipolar plate according to claim 4, characterized in that: The first stamping protrusion (31) and the second stamping protrusion (32) have the same height.

6. The bipolar plate according to any one of claims 2 to 5, characterized in that: Sealant lines (20) are arranged in both the first sealant line accommodating groove (11a) and the second sealant line accommodating groove (12a).

7. The bipolar plate according to claim 6, characterized in that: At least the sealant line (20) located in the first sealant line accommodating groove (11a) has a plurality of protrusions (21), the protrusions (21) of the sealant line (20) located in the first sealant line accommodating groove (11a) correspond one-to-one to the first stamping protrusions (31), and the protrusions (21) are located in corresponding first stamping protrusions (31).

8. The bipolar plate according to claim 7, characterized in that: The sealant line (20) is injection-molded in the first sealant line containing groove (11a).

9. The bipolar plate according to any one of claims 1 to 5, characterized in that: The support structure (30) is in the shape of a cylinder, an elliptical cylinder or a prism.

10. A fuel cell, characterized in that: It comprises the bipolar plate as claimed in any one of claims 1 to 9.

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