Air-cooled graphite bipolar plate

Abstract

The utility model provides an air-cooled graphite bipolar plate, which relates to the technical field of bipolar plates and comprises a bipolar plate body, mounting grooves are symmetrically arranged on two sides of the bipolar plate body, auxiliary devices are arranged on two sides of each mounting groove, and each auxiliary device comprises a first extension plate and a second extension plate. The first extension plate and the second extension plate are symmetrically arranged on the two sides of the mounting groove, one side of the first extension plate is fixedly connected with one end of the bipolar plate body, one side of the second extension plate is fixedly connected with one side of the bipolar plate body, and the inner walls of the first extension plate and the second extension plate are symmetrically in threaded connection with threaded rods; by arranging the two clamping plates, under the action of the threaded rod, the threaded rod can drive the clamping plates to move until the connecting shaft is completely clamped by the two clamping plates, so that auxiliary fixation can be performed between the connecting shaft and the bipolar plate body, and the connection between the mounting groove and the connecting shaft can be prevented from loosening; and the stability of the fuel cell is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bipolar plate technical field especially relates to a air -cooled graphite bipolar plate. BACKGROUND

[0002] Air -cooled graphite bipolar plate is a kind of widely used key component in fuel cell and other electrochemical applications, and graphite bipolar plate has high efficient electrochemical reaction performance, and air -cooled graphite bipolar plate has certain difference with non air -cooled graphite bipolar plate, which makes this graphite bipolar plate adopt air -cooled mode to radiate heat, instead of traditional water-cooled mode, and is widely used in fuel cell and oxygen production and other fields.

[0003] Generally, fuel cell is mainly composed of two air -cooled graphite bipolar plates, diffusion layer, proton exchange membrane and catalytic layer are arranged between the two air -cooled graphite bipolar plates, and the two air -cooled graphite bipolar plates are connected by connecting shaft, one connecting shaft connects the installation groove of two air -cooled graphite bipolar plates, but the installation groove can cause the connection between the installation groove and the connecting shaft to be loose due to the actual existence of machining error, thereby being not conducive to the stability of fuel cell, UTILITY MODEL CONTENT

[0004] The utility model discloses to solve the problem that the installation groove can cause the connection between the installation groove and the connecting shaft to be loose due to the actual existence of machining error, thereby being not conducive to the stability of fuel cell, and proposes an air -cooled graphite bipolar plate.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: an air -cooled graphite bipolar plate, including bipolar plate body, the two sides of the bipolar plate body are symmetrically provided with installation groove, the two sides of the installation groove are provided with auxiliary device, the auxiliary device includes first extension plate and second extension plate, the first extension plate and the second extension plate are symmetrically arranged on the two sides of installation groove, one side of the first extension plate is fixedly connected with one end of bipolar plate body, one side of the second extension plate is fixedly connected with one side of bipolar plate body, the inner wall of the first extension plate and the second extension plate is symmetrically connected with threaded rod, one end of two threaded rods is rotatably connected with the same clamping plate, two clamping plates are arranged between the first extension plate and the second extension plate, support device is arranged at the four corners of the bipolar plate body.

[0006] The effect achieved by the above components is that: by arranging the clamping plates, under the action of the two threaded rods, the two threaded rods rotate simultaneously, and the two threaded rods drive the clamping plates to move towards the mounting grooves until one side of the clamping plate abuts against the outer surface of the connecting shaft in the mounting groove, and the clamping plate on the other side of the mounting groove is adjusted so that one side of the clamping plate also abuts against the outer surface of the connecting shaft, so that the two clamping plates can assist in fixing between the connecting shaft and the bipolar plate body, which is beneficial to prevent the connection between the mounting groove and the connecting shaft from loosening, and is beneficial to improve the stability of the fuel cell.

[0007] Preferably, one end of the threaded rod is fixedly connected with a bearing, and the outer surface of the bearing is fixedly connected with the inner wall of the clamping plate.

[0008] The effect achieved by the above components is that: by arranging the bearing, the friction between the threaded rod and the clamping plate can be reduced when the threaded rod is rotated, so that it is more labor-saving when the threaded rod is rotated.

[0009] Preferably, the other end of the threaded rod is fixedly connected with an operating block, and the outer surface of the operating block is provided with a protrusion.

[0010] The effect achieved by the above components is that: by arranging the operating block, rotating the operating block can drive the threaded rod to rotate, and the protrusion on the outer surface of the operating block can effectively increase the friction of the outer surface of the operating block, which has an anti-skid effect when the operating block is rotated.

[0011] Preferably, two circular rods are arranged between the two threaded rods, one end of the circular rod is fixedly connected with one side of the clamping plate, and the outer surfaces of the two circular rods are respectively slidably connected with the inner walls of the first extension plate and the second extension plate.

[0012] The effect achieved by the above components is that: by arranging two circular rods, under the action of the two clamping plates, when the two clamping plates move under the action of the threaded rods, the two clamping plates will respectively drive a circular rod to slide synchronously in the inner walls of the first extension plate and the second extension plate, so that the circular rod can limit and guide the clamping plate.

[0013] Preferably, the side close to each other of the two clamping plates is fixedly connected with a rubber plate, and the side of the rubber plate is uniformly provided with a groove.

[0014] The effect achieved by the above components is that: by arranging the rubber plate with a groove, the friction of the clamping side of the clamping plate can be increased, so that the clamping of the two clamping plates on the connecting shaft is more stable.

[0015] Preferably, the supporting device comprises four rectangular rods, one end of each of the four rectangular rods abuts against the corner at the two ends of the bipolar plate body, and one end of the rectangular rod is fixedly connected with a supporting block.

[0016] The effects achieved by the above components are that: by arranging the rectangular rods and the supporting blocks, the two ends of the bipolar plate body can be extended, and when the air-cooled graphite bipolar plate is vertically placed, the supporting blocks can abut against the placing surface, which is beneficial to prevent the threaded rods and the round rods from protruding from one end of the bipolar plate body, and thus preventing the fuel cell formed by the air-cooled graphite bipolar plate from being difficult to be stably placed.

[0017] Preferably, one end of the rectangular rod is fixedly connected with a clamping groove block, one side of the clamping groove block abuts against one side of the bipolar plate body, a threaded pin is inserted into the inner wall of the clamping groove block, the threaded pin is made of insulating material, one end of the threaded pin is fixedly connected with one side of the bipolar plate body, and a nut is threadedly connected with the outer surface of the threaded pin.

[0018] The effects achieved by the above components are that: by arranging the threaded pin, inserting the threaded pin into the inner wall of the clamping groove block, and abutting one side of the clamping groove block and one side of the rectangular rod against the outer surface of the bipolar plate body, and then rotating the nut to abut one side of the nut against one side of the clamping groove block, the supporting rod and the bipolar plate body can be fixed, which is beneficial to prevent the rectangular rod from being separated from the bipolar plate body.

[0019] Preferably, one end of the threaded pin is fixedly connected with a round block, and the outer diameter of the round block is greater than the outer diameter of the threaded pin.

[0020] The effects achieved by the above components are that: by arranging the round block, the one end of the threaded pin can be blocked, which is beneficial to prevent the nut from being separated from the threaded pin and thus preventing the nut from being easily lost.

[0021] Compared with the prior art, the advantages and positive effects of the utility model lie in that:

[0022] In the utility model, under the action of the threaded rod, the threaded rod can drive the clamping plates to move until the two clamping plates tightly clamp the connecting shaft, so that the connecting shaft and the bipolar plate body can be auxiliary fixed, which is beneficial to prevent the connection between the mounting groove and the connecting shaft from being loose, and thus beneficial to improve the stability of the fuel cell. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the main body of the utility model;

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the auxiliary device of the utility model;

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the auxiliary device of the utility model; Figure 2

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the auxiliary device of the utility model;​Figure 2 Enlarged structural schematic view of B in FIG. 1.

[0027] Legend: 1, bipolar plate body; 2, mounting groove; 3, auxiliary device; 31, first extension plate; 32, second extension plate; 33, threaded rod; 34, clamp plate; 35, bearing; 36, operating block; 37, round rod; 38, rubber plate; 4, support device; 41, rectangular rod; 42, support block; 43, clamping groove block; 44, threaded pin; 45, nut; 46, round block. DETAILED DESCRIPTION

[0028] Example 1, with reference to Figures 1-3 As shown in the figure, the embodiment discloses an air-cooled graphite bipolar plate, which comprises a bipolar plate body 1, mounting grooves 2 are symmetrically arranged on both sides of the bipolar plate body 1, auxiliary devices 3 are arranged on both sides of the mounting grooves 2, the auxiliary devices 3 comprise first extension plates 31 and second extension plates 32, the first extension plates 31 and the second extension plates 32 are symmetrically arranged on both sides of the mounting grooves 2, one side of the first extension plate 31 is fixedly connected with one end of the bipolar plate body 1, one side of the second extension plate 32 is fixedly connected with one side of the bipolar plate body 1, the inner walls of the first extension plate 31 and the second extension plate 32 are symmetrically and threadedly connected with threaded rods 33, one end of the two threaded rods 33 is rotationally connected with the same clamp plate 34, the two clamp plates 34 are arranged between the first extension plate 31 and the second extension plate 32, support devices 4 are arranged at four corners of the bipolar plate body 1, through the arrangement of the clamp plate 34, under the action of the two threaded rods 33, the two threaded rods 33 are simultaneously rotated, the two threaded rods 33 drive the clamp plate 34 to move towards the mounting groove 2, until one side of the clamp plate 34 abuts against the outer surface of the connecting shaft in the mounting groove 2, and the clamp plate 34 on the other side of the mounting groove 2 is adjusted, so that one side of the clamp plate 34 also abuts against the outer surface of the connecting shaft, then the two clamp plates 34 can assist in fixing between the connecting shaft and the bipolar plate body 1, which is beneficial to prevent the connection between the mounting groove 2 and the connecting shaft from loosening, and is beneficial to improve the stability of the fuel cell.

[0029] With reference to Figure 2 and Figure 3 As shown in the figure, one end of the threaded rod 33 is fixedly connected with a bearing 35, the outer surface of the bearing 35 is fixedly connected with the inner wall of the clamp plate 34, through the arrangement of the bearing 35, the friction between the threaded rod 33 and the clamp plate 34 can be reduced when the threaded rod 33 is rotated, so that it is more labor-saving when the threaded rod 33 is rotated; the other end of the threaded rod 33 is fixedly connected with an operating block 36, the outer surface of the operating block 36 is provided with a protrusion, through the arrangement of the operating block 36, rotating the operating block 36 can drive the threaded rod 33 to rotate, and the outer surface of the operating block 36 is provided with a protrusion, which can effectively increase the friction of the outer surface of the operating block 36, and has the effect of preventing slipping when the operating block 36 is rotated.

[0030] With reference toFigure 2 And Figure 3 As shown in the figure, two threaded rods 33 are provided between the two clamping plates 34, one end of the circular rod 37 is fixedly connected with one side of the clamping plate 34, the outer surfaces of the two circular rods 37 are respectively slidably connected with the inner walls of the first extension plate 31 and the second extension plate 32. By providing two circular rods 37, under the action of the two clamping plates 34, when the two clamping plates 34 are moved under the action of the threaded rods 33, the two clamping plates 34 will respectively drive one circular rod 37 to slide synchronously on the inner walls of the first extension plate 31 and the second extension plate 32. The circular rod 37 can limit and guide the clamping plate 34. The side of the two clamping plates 34 close to each other is fixedly connected with a rubber plate 38, and the side of the rubber plate 38 is uniformly provided with a groove. By providing the rubber plate 38 with a groove, the friction on the clamping side of the clamping plate 34 can be increased, so that the clamping of the two clamping plates 34 on the connecting shaft is more stable.

[0031] Referring to Figure 2 And Figure 4 As shown in the figure, the support device 4 includes four rectangular rods 41, one end of the four rectangular rods 41 respectively abuts the corner of the two ends of the bipolar plate body 1, and one end of the rectangular rod 41 is fixedly connected with a support block 42. By providing the rectangular rod 41 and the support block 42, the rectangular rod 41 and the support block 42 can extend the two ends of the bipolar plate body 1. When the air-cooled graphite bipolar plate is placed vertically, the support block 42 can abut the placement surface, which is conducive to preventing the threaded rod 33 and the circular rod 37 from protruding from one end of the bipolar plate body 1, thereby causing the fuel cell formed by the air-cooled graphite bipolar plate to be difficult to place stably.

[0032] Referring to Figure 2 And Figure 4 As shown in the figure, one end of the rectangular rod 41 is fixedly connected with a clamping groove block 43, one side of the clamping groove block 43 abuts one side of the bipolar plate body 1, a threaded pin 44 is inserted into the inner wall of the clamping groove block 43, the threaded pin 44 is made of insulating material, one end of the threaded pin 44 is fixedly connected with one side of the bipolar plate body 1, and a nut 45 is threadedly connected with the outer surface of the threaded pin 44. By providing the threaded pin 44, inserting the threaded pin 44 into the inner wall of the clamping groove block 43, and abutting one side of the clamping groove block 43 and one side of the rectangular rod 41 with the outer surface of the bipolar plate body 1, and then rotating the nut 45 to abut one side of the nut 45 with one side of the clamping groove block 43, the support rod and the bipolar plate body 1 can be fixed, which is conducive to preventing the rectangular rod 41 from separating from the bipolar plate body 1. One end of the threaded pin 44 is fixedly connected with a circular block 46, and the outer diameter of the circular block 46 is greater than the outer diameter of the threaded pin 44. By providing the circular block 46, the end of the threaded pin 44 can be blocked, which is conducive to preventing the nut 45 from separating from the threaded pin 44 and causing the nut 45 to be easily lost.

[0033] Working principle: rotate two operation blocks 36 on one side of the clamping plate 34 at the same time, the operation block 36 will drive the threaded rod 33 to rotate, under the limiting of the round rod 37, the two threaded rods 33 will drive the clamping plate 34 to move to the installation groove 2, until the rubber plate 38 on one side of the clamping plate 34 abuts against the outer surface of the connecting shaft in the installation groove 2, at the same time, adjust the clamping plate 34 on the other side of the installation groove 2 through the operation block 36, so that the rubber plate 38 on one side of the clamping plate 34 also abuts against the outer surface of the connecting shaft, then the two clamping plates 34 can assist in fixing between the connecting shaft and the bipolar plate body 1, which is beneficial to prevent the connection between the installation groove 2 and the connecting shaft from loosening, and is beneficial to improve the stability of the fuel cell; insert the threaded pin 44 into the inner wall of the clamping groove block 43, so that one side of the clamping groove block 43 and one side of the rectangular rod 41 abut against the outer surface of the bipolar plate body 1, then rotate the nut 45, so that one side of the nut 45 abuts against one side of the clamping groove block 43, which can fix between the support rod and the bipolar plate body 1, which is beneficial to prevent the rectangular rod 41 from separating from the bipolar plate body 1, and the rectangular rod 41 and the support block 42 can extend to both ends of the bipolar plate body 1, so that when the air-cooled graphite bipolar plate is placed vertically, the support block 42 can abut against the placement surface, which is beneficial to prevent the threaded rod 33 and the round rod 37 from protruding from one end of the bipolar plate body 1, causing the fuel cell composed of the air-cooled graphite bipolar plate to be difficult to place stably.

Claims

1. A wind-cooled graphite bipolar plate, comprising a bipolar plate body (1), characterized in that: The bipolar plate body (1) has symmetrically provided mounting grooves (2) on both sides. The mounting grooves (2) are provided with auxiliary devices (3) on both sides. The auxiliary devices (3) include a first extension plate (31) and a second extension plate (32). The first extension plate (31) and the second extension plate (32) are symmetrically provided on both sides of the mounting groove (2). One side of the first extension plate (31) is fixedly connected to one end of the bipolar plate body (1). One side of the second extension plate (32) is fixedly connected to one side of the bipolar plate body (1). The inner walls of the first extension plate (31) and the second extension plate (32) are symmetrically threaded with threaded rods (33). One end of the two threaded rods (33) is rotatably connected to the same clamping plate (34). The two clamping plates (34) are provided between the first extension plate (31) and the second extension plate (32). Support devices (4) are provided at the four corners of the bipolar plate body (1).

2. The air-cooled graphite bipolar plate according to claim 1, characterized in that: One end of the threaded rod (33) is fixedly connected to a bearing (35), and the outer surface of the bearing (35) is fixedly connected to the inner wall of the clamping plate (34).

3. The air-cooled graphite bipolar plate according to claim 1, characterized in that: The other end of the threaded rod (33) is fixedly connected to an operating block (36), and the outer surface of the operating block (36) is provided with protrusions.

4. The air-cooled graphite bipolar plate according to claim 1, characterized in that: A round rod (37) is provided between the two threaded rods (33). One end of the round rod (37) is fixedly connected to one side of the clamping plate (34). The outer surfaces of the two round rods (37) are slidably connected to the inner walls of the first extension plate (31) and the second extension plate (32), respectively.

5. The air-cooled graphite bipolar plate according to claim 1, characterized in that: A rubber plate (38) is fixedly connected to one side of each of the two clamping plates (34) that are close to each other, and a groove is evenly provided on one side of the rubber plate (38).

6. The air-cooled graphite bipolar plate according to claim 1, characterized in that: The support device (4) includes four rectangular rods (41), one end of each of the four rectangular rods (41) abuts against the corners of both ends of the bipolar plate body (1), and one end of each rectangular rod (41) is fixedly connected to a support block (42).

7. The air-cooled graphite bipolar plate according to claim 6, characterized in that: One end of the rectangular rod (41) is fixedly connected to a slot block (43). One side of the slot block (43) abuts against one side of the bipolar plate body (1). A threaded pin (44) is inserted into the inner wall of the slot block (43). The threaded pin (44) is made of insulating material. One end of the threaded pin (44) is fixedly connected to one side of the bipolar plate body (1). A nut (45) is threaded onto the outer surface of the threaded pin (44).

8. The air-cooled graphite bipolar plate according to claim 7, characterized in that: One end of the threaded pin (44) is fixedly connected to a round block (46), the outer diameter of which is larger than the outer diameter of the threaded pin (44).

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