A fuel cell bipolar plate pasting and fixing fixture

Abstract

The present invention discloses a fuel cell bipolar plate pasting and fixing fixture, including a base plate, a fixing plate, a limiting plate, a hydrogen inlet positioning block, a hydrogen outlet positioning block, a coolant inlet positioning block, a coolant outlet positioning block, an air inlet positioning block, and an air outlet positioning block. The base plate is provided with a groove, and a fixing pin is provided on the base plate. The fixing plate is provided on the outer edge of the groove of the base plate. The present invention provides a fixing fixture, which can be used to first fix the bipolar plate using the base plate, the fixing plate, and the limiting plate, and then set the sealing strip. The fast fixing and pasting of the cathode and anode sealing strips of the bipolar plate can be achieved in the early stage of the development of the battery stack, and the consistency of the fixing position of the sealing strip is ensured, the accuracy of the setting of the sealing strip is improved, and the sealing consistency and internal force consistency of the battery stack in the early stage of the development of the battery stack are improved. It can solve the problems of repeated positioning of the sealing strip caused by manual pasting, poor consistency of pasting quality, and sealing failure.

Description

Technical Field

[0001] The invention belongs to the technical field of battery production, and in particular relates to a fuel cell bipolar plate pasting and fixing fixture. Background Art

[0002] During the assembly process of the fuel cell stack, the stack is composed of multiple bipolar plates and membrane electrodes stacked in a certain order. During the operation of the stack, the internal fuel, oxidant and coolant are sealed through the sealant lines between the bipolar plates and the membrane electrodes. Usually, the sealant lines are fixedly attached to the bipolar plates. If the position of the sealant lines on the bipolar plates is not the same, it will cause the sealant lines to be misaligned during the assembly of the stack, and the vertical consistency of the sealant lines in the stacking direction cannot be guaranteed, causing the seal of the stack to fail, and the shear stress of the sealant lines to increase, affecting the internal force uniformity of the stack, thereby affecting the performance of the stack. Therefore, in order to ensure the sealing and performance output of the stack, the position of the sealant lines on each bipolar plate must be kept consistent.

[0003] The sealing glue line is usually attached to the bipolar plate by pasting the finished sealing glue line, injection molding of glue, and dispensing of equipment. Glue mold injection molding and equipment dispensing are mainly used in the subsequent sealing method finalization and mass production stages. In the early stage of battery stack design finalization and mass production, the glue line pasting and fixing method is usually adopted. The sealing glue line is usually attached by pasting the finished sealing glue line. The pasting of the finished sealing glue line is mostly done by manual fixing, so as to save R&D costs.

[0004] During the manual fixing and pasting process of the finished product sealing glue line, since the sealing glue line is relatively soft, the sealing glue line is easily deformed during the manual fixing and pulling process, making it difficult to ensure that the position of the sealing glue line in the bipolar plate sealing and pasting groove remains consistent, causing the sealing glue line to be misplaced during the battery stack assembly process, thereby affecting the sealing and performance output of the battery stack. In order to solve this problem, the present invention, based on the existing technology, designs a fuel cell bipolar plate glue line pasting and fixing tool to achieve the consistency of the position fixation of the sealing glue line in the bipolar plate glue line sealing groove.

[0005] Patent 2019220830304 discloses a fixture for detecting the compactness of a fuel cell bipolar plate, including a plate to be tested and an upper fixture assembly and a lower fixture assembly for detecting the plate to be tested, the upper fixture assembly and the lower fixture assembly are both provided with a test gas chamber for detecting the plate to be tested, and the two test gas chambers form a closed cavity when the upper fixture assembly and the lower fixture assembly are closed, and a test gas connector is provided on the same side of the upper fixture assembly and the lower fixture assembly. The fixture needs to be provided with a plate sealing structure on both sides of the plate to be tested, so there are more setting processes and higher costs. The fixture needs to fix the plate sealing structure through the upper fixture assembly and the lower fixture assembly, and the fixture is used for compactness performance testing. Therefore, a fixture is needed that can use a sealing structure on one side and can realize rapid fixing and pasting of the bipolar plate sealing structure in the early stage of battery stack development. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a fuel cell bipolar plate pasting and fixing fixture, which can solve the problem that the position of the sealing glue line in the bipolar plate sealing pasting groove is difficult to maintain consistency.

[0007] The present invention is achieved through the following technical solutions.

[0008] The present invention provides a fuel cell bipolar plate pasting and fixing fixture, comprising a base plate, a fixing plate, a limiting plate, a hydrogen inlet positioning block, a hydrogen outlet positioning block, a coolant inlet positioning block, a coolant outlet positioning block, an air inlet positioning block, and an air outlet positioning block. The base plate is provided with a groove, the base plate is provided with a fixing pin, and the fixing plate is arranged on the outer edge of the groove of the base plate.

[0009] Preferably, a bipolar plate is arranged in the groove, and the shape of the groove matches the outer size of the bipolar plate. A limiting hole A, a limiting hole B, and a limiting hole C are arranged on one side of the groove. Hollows B, hollows C, and hollows D are arranged on one side of the bipolar plate. Hollows E, hollows F, and hollows G are arranged on the other side of the bipolar plate. A limiting hole D, a limiting hole E, and a limiting hole F are arranged on the other side of the groove. The limiting hole A is located below the hollow B, the limiting hole B is located below the hollow C, the limiting hole C is located below the hollow D, the limiting hole D is located below the hollow E, the limiting hole E is located below the hollow F, and the limiting hole F is located below the hollow G. The limiting plate is arranged on the flow field area of ​​the bipolar plate, and a sealing strip is arranged on the bipolar plate.

[0010] Preferably, the hydrogen inlet positioning block is set at hollow B, the coolant outlet positioning block is set at hollow C, the air outlet positioning block is set at hollow D, the hydrogen outlet positioning block is set at hollow E, the coolant inlet positioning block is set at hollow F, and the air inlet positioning block is set at hollow G.

[0011] Preferably, a hollow A is provided on the fixed plate, and the limiting plate is placed in the hollow A. The length and width of the hollow A on the fixed plate match the outer dimensions of the sealing strip. The thickness of the hollow A is 2-6 mm. A limiting groove is provided at the hollow A. The thickness of the limiting groove is 1 / 2-2 / 3 of the thickness of the bipolar plate. The length and width of the limiting groove match the length and width of the bipolar plate, and the sum of the thickness of the limiting groove and the thickness of the groove is equal to the thickness of the bipolar plate.

[0012] Preferably, a limiting hole G is provided on the limiting plate, the length and width of the limiting plate match the inner cavity size of the sealing strip, the limiting hole G is any one of a rounded rectangular blind hole and an elliptical blind hole, and the number of the limiting holes G is 2-6.

[0013] Preferably, a limiting hole H is provided on the bottom plate, and the fixing pin is an asymmetric U-shaped structure, one end of the fixing pin extends into the limiting hole H to form a connection, and the other end of the fixing pin extends into the limiting hole G to form a connection.

[0014] Preferably, the hydrogen inlet positioning block is provided with a first step A, a second step A, and a limiting column A. The outer dimension of the first step A matches the dimension of the hydrogen inlet sealing inner cavity of the sealing strip, the outer dimension of the second step A matches the inner cavity dimension of the hollow B, the limiting column A extends into the limiting hole A to form a connection, and the hydrogen outlet positioning block has the same structure and connection method as the hydrogen inlet positioning block.

[0015] Preferably, the coolant outlet positioning block is provided with a first step B, a second step B, and a limiting column B. The outer dimension of the first step B matches the dimension of the coolant outlet sealing inner cavity of the sealing strip, the outer dimension of the second step B matches the dimension of the hollow C, the limiting column B extends into the limiting hole B to form a connection, and the coolant inlet positioning block has the same structure and connection method as the coolant outlet positioning block.

[0016] Preferably, the air outlet positioning block is provided with a first step C, a second step C, and a limiting column C. The outer dimension of the first step C matches the dimension of the air outlet sealing inner cavity of the sealing strip, the outer dimension of the second step C matches the dimension of the hollow D, the limiting column C extends into the limiting hole C to form a connection, and the air inlet positioning block has the same structure and connection method as the air outlet positioning block.

[0017] Preferably, the base plate, fixed plate, limit plate, hydrogen inlet positioning block, hydrogen outlet positioning block, coolant inlet positioning block, coolant outlet positioning block, air inlet positioning block, air outlet positioning block, and fixing pin are made of one or more of aluminum alloy, water glass, and fiberboard.

[0018] A fuel cell bipolar plate pasting and fixing fixture, which can be used for one or both of the cathode side gas sealing and the anode side gas sealing of the bipolar plate

[0019] A fuel cell bipolar plate pasting and fixing fixture can be used for pasting and fixing one or more of graphite bipolar plates, metal bipolar plates, and composite bipolar plates.

[0020] The beneficial effects of the present invention are:

[0021] The present invention provides a fixing fixture, which can be used to fix the bipolar plate with a bottom plate, a fixing plate, and a limiting plate before setting the sealing strip, so as to realize the rapid fixing and pasting of the bipolar plate sealing strip in the early stage of the battery stack development, reduce the production cost of the sealing strip pasting process, ensure the consistency of the sealing strip fixing position, improve the accuracy of the sealing strip setting, and improve the sealing consistency and internal force consistency of the battery stack in the early stage of the battery stack development. It can solve the problems of repeated positioning of the sealing strip caused by manual pasting, poor pasting quality consistency, and sealing failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an exploded view of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure after the bipolar plate is pasted and fixed using the clamp of the present invention;

[0025] Figure 4 is a top view of a bipolar plate after being pasted and fixed using the clamp of the present invention;

[0026] Figure 5 It is a schematic diagram of the sealing strip structure of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the bottom plate of the present invention;

[0028] Figure 7 It is a structural schematic diagram of the fixing plate of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the limiting groove of the present invention;

[0030] Fig. 9 It is a structural schematic diagram of the limiting plate of the present invention;

[0031] Fig.10 It is a structural schematic diagram of the hydrogen inlet positioning block of the present invention;

[0032] Fig.11 It is a structural schematic diagram of the coolant outlet positioning block of the present invention;

[0033] Fig.12 It is a structural schematic diagram of the air outlet positioning block of the present invention;

[0034] Fig.13 It is a structural schematic diagram of the fixing pin of the present invention;

[0035] Fig.14 It is a schematic diagram of the structure of the combination A of the present invention;

[0036] Fig.15 It is a schematic diagram of the structure of the assembly B of the present invention;

[0037] Fig.16 It is a schematic diagram of the structure of the assembly C of the present invention;

[0038] Fig.17 It is a schematic diagram of the installation of the sealing strip of the present invention;

[0039] Fig.18 It is a schematic diagram of the installation of the fixing pin of the present invention;

[0040] Fig.19 It is a schematic diagram of the structure in which the sealing strip of the present invention is arranged on the bipolar plate.

[0041] In the figure: 1-bipolar plate, 11-hollow B, 12-hollow C, 13-hollow D, 1101-hollow E, 1201-hollow F, 1301-hollow G, 16-flow field area, 2-bottom plate, 21-groove, 22-limiting hole A, 23-limiting hole B, 24-limiting hole C, 2201-limiting hole D, 2301-limiting hole E, 2401-limiting hole F, 25-limiting hole H, 3-fixed plate, 31-hollow A, 32-limiting groove, 4-limiting plate, 41-limiting hole G, 5-hydrogen inlet positioning block, 51-first step A, 52-second step A, 53-limiting column A, 501-hydrogen outlet positioning block, 6-coolant outlet positioning block, 61-first step B, 62-second step B, 63-limiting column B, 601-coolant inlet positioning block, 7-air outlet positioning block, 71-first step C, 72-second step C, 73-limiting column C, 701-air inlet positioning block, 8-fixing pin, 9-sealing strip, 91-hydrogen inlet sealing inner cavity, 92-coolant outlet sealing inner cavity, 93-air outlet sealing inner cavity, 94-inner cavity, 9101-hydrogen outlet sealing inner cavity, 9201-coolant inlet sealing inner cavity, 9301-air inlet and outlet sealing inner cavity. DETAILED DESCRIPTION

[0042] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0043] Embodiment 1:

[0044] like Figures 1 to 19As shown, a fuel cell bipolar plate pasting and fixing fixture includes a base plate 2, a fixing plate 3, a limiting plate 4, a hydrogen inlet positioning block 5, a hydrogen outlet positioning block 501, a coolant inlet positioning block 601, a coolant outlet positioning block 6, an air inlet positioning block 701, and an air outlet positioning block 7. A groove 21 is provided on the base plate 2, and a fixing pin 8 is provided on the base plate 2. The fixing plate 3 is arranged on the outer edge of the groove 21 of the base plate 2. This arrangement ensures that after the bipolar plate 1 is placed in the groove 21, it does not hinder the fixing plate 3 from being arranged on the base plate 2.

[0045] The bipolar plate 1 is arranged in the groove 21, and the bipolar plate 1 is the pasting and fixing target of the clamp. The shape of the groove 21 matches the outer size of the bipolar plate 1. A limiting hole A22, a limiting hole B23, and a limiting hole C24 are arranged on one side of the groove 21. A hollow B11, a hollow C12, and a hollow D13 are arranged on one side of the bipolar plate 1. A hollow E1101, a hollow F1201, and a hollow G1301 are arranged on the other side of the bipolar plate 1. A limiting hole D220 is arranged on the other side of the groove 21. 1, limiting hole E2301, limiting hole F2401, the limiting hole A22 is located below the hollow B11, the limiting hole B23 is located below the hollow C12, the limiting hole C24 is located below the hollow D13, the limiting hole D2201 is located below the hollow E1101, the limiting hole E2301 is located below the hollow F1201, the limiting hole F2401 is located below the hollow G1301, the limiting plate 4 is arranged on the flow field area 16 of the bipolar plate 1, and the bipolar plate 1 is provided with a sealing strip 9. The thickness of the bottom plate 2 is 6mm. The limiting hole A22, the limiting hole B23, the limiting hole C24, the limiting hole D2201, the limiting hole E2301, and the limiting hole F2401 are rounded blind holes with a side length (length and width are the same) of 3mm and a depth of 3mm.

[0046] The sealing strip 9 (sealing strip) is made of silicone or silicone rubber. After the sealing strip 9 is set on the bipolar plate 1, the top height of the sealing strip 9 is greater than the top height of the bipolar plate 1, because when the battery stack is assembled, the sealing strip 9 needs to be compressed to achieve the sealing effect; the hydrogen inlet positioning block 5 and the hydrogen outlet positioning block 501, the coolant outlet positioning block 6 and the coolant inlet positioning block 601, and the air outlet positioning block 7 and the air inlet positioning block 701 can be placed interchangeably. The sealing strip 9 is a sealing rubber line, wherein the gaps between the hydrogen inlet positioning block 5, the coolant outlet positioning block 6, and the air outlet positioning block 7, the gaps between the hydrogen inlet positioning block 5, the coolant outlet positioning block 6, the air outlet positioning block 7 and the fixed plate 3, the limiting plate 4, the gaps between the hydrogen outlet positioning block 501, the coolant inlet positioning block 601, the air inlet positioning block 701, the gaps between the hydrogen outlet positioning block 501, the coolant inlet positioning block 601, the air inlet positioning block 701 and the fixed plate 3, the limiting plate 4, and the gap between the fixed plate 3 and the limiting plate 4 are all filled and sealed by the sealing strip 9.

[0047] The hydrogen inlet positioning block 5 is set at the hollow B11, the coolant outlet positioning block 6 is set at the hollow C12, the air outlet positioning block 7 is set at the hollow D13, the hydrogen outlet positioning block 501 is set at the hollow E1101, the coolant inlet positioning block 601 is set at the hollow F1201, and the air inlet positioning block 701 is set at the hollow G1301.

[0048] The fixed plate 3 is provided with a hollow A31, and the limiting plate 4 is placed in the hollow A31. The length and width of the hollow A31 on the fixed plate 3 match the outer dimensions of the sealing strip 9. The thickness of the hollow A31 is 3mm. A limiting groove 32 is provided at the hollow A31. The thickness of the limiting groove 32 is 1 / 2 of the thickness of the bipolar plate 1. The length and width of the limiting groove 32 match the length and width of the bipolar plate 1. The sum of the thickness of the limiting groove 32 and the thickness of the groove 21 is equal to the thickness of the bipolar plate 1. Among them, the thickness of the hollow A31 is h1, the thickness of the limiting groove 32 is h2, and the thickness of the fixed plate 3 is h3, h1+h2=h3. When the fixed plate 3 is set, the limiting groove 32 is placed in the direction of the bipolar plate 1.

[0049] The limiting plate 4 is provided with limiting holes G41 , the length and width of which match the size of the inner cavity 94 of the sealing strip 9 , and the limiting holes G41 are rounded rectangular blind holes, and the number of the limiting holes G41 is 4.

[0050] The bottom plate 2 is provided with a limit hole H25, and the fixing pin 8 is an asymmetric U-shaped structure, one end of the fixing pin 8 extends into the limit hole H25 to form a connection, and the other end of the fixing pin 8 extends into the limit hole G41 to form a connection. The number of fixing pins 8 corresponds to the number of limit holes G41.

[0051] The hydrogen inlet positioning block 5 is provided with a first step A51, a second step A52, and a limiting column A53. The first step A51 is connected to one end of the second step A52, and the other end of the second step A52 is connected to the limiting column A53. The outer dimensions of the first step A51 match the dimensions of the hydrogen inlet sealing cavity 91 and the hydrogen outlet sealing cavity 9101 of the sealing strip 9. The thickness of the first step A51 is the same as h1. The outer dimensions of the second step A52 match the inner dimensions of the hollow B11. The thickness of the second step A52 matches the thickness of the hollow B11, the limiting column A53 extends into the limiting hole A22 to form a connection, and the hydrogen outlet positioning block 501 has the same structure and connection method as the hydrogen inlet positioning block 5; that is, the hydrogen outlet positioning block 501 is provided with a first step A51, a second step A52, and a limiting column A53, the hydrogen outlet positioning block 501 is arranged corresponding to the hollow E1101, and the limiting column A53 of the hydrogen outlet positioning block 501 extends into the limiting hole D2201 to form a connection.

[0052] The coolant outlet positioning block 6 is provided with a first step B61, a second step B62, and a limiting column B63. The first step B61 is connected to one end of the second step B62, and the other end of the second step B62 is connected to the limiting column B63. The outer dimensions of the first step B61 match the dimensions of the coolant outlet sealing cavity 92 and the coolant inlet sealing cavity 9201 of the sealing strip 9. The thickness of the first step B61 is the same as h1. The outer dimensions of the second step B62 match the dimensions of the hollow C12. The thickness of the second step B62 matches the thickness of the hollow C12, the limiting column B63 extends into the limiting hole B23 to form a connection, and the coolant inlet positioning block 601 has the same structure and connection method as the coolant outlet positioning block 6; that is, the coolant inlet positioning block 601 is provided with a first step B61, a second step B62, and a limiting column B63, the coolant inlet positioning block 601 is arranged corresponding to the hollow F1201, and the limiting column B63 of the coolant inlet positioning block 601 extends into the limiting hole E2301 to form a connection.

[0053] The air outlet positioning block 7 is provided with a first step C71, a second step C72, and a limiting column C73. The first step C71 is connected to one end of the second step C72, and the other end of the second step C72 is connected to the limiting column C73. The outer size of the first step C71 matches the size of the air outlet sealing cavity 93 and the air inlet and outlet sealing cavity 9301 of the sealing strip 9. The thickness of the first step C71 is the same as h1. The outer size of the second step C72 matches the size of the hollow D13. The second step C The thickness of 72 matches the thickness of hollow D13, the limiting column C73 extends into the limiting hole C24 to form a connection, the limiting column C73 has a height of 2.5 mm, and the air inlet positioning block 701 has the same structure and connection method as the air outlet positioning block 7; that is, the air inlet positioning block 701 is provided with a first step C71, a second step C72, and a limiting column C73, the air inlet positioning block 701 is provided corresponding to the hollow G1301, and the limiting column C73 of the air inlet positioning block 701 extends into the limiting hole F2401 to form a connection.

[0054] The base plate 2, the fixing plate 3, the limiting plate 4, the hydrogen inlet positioning block 5, the hydrogen outlet positioning block 501, the coolant inlet positioning block 601, the coolant outlet positioning block 6, the air inlet positioning block 701, the air outlet positioning block 7, and the fixing pin 8 are made of aluminum alloy.

[0055] A fuel cell bipolar plate pasting and fixing fixture can be used for one or both of the cathode side gas sealing and the anode side gas sealing of the bipolar plate 1.

[0056] A fuel cell bipolar plate pasting and fixing fixture can be used for pasting and fixing graphite bipolar plates.

[0057] Example 2

[0058] like Figures 1 to 19 As shown, a fuel cell bipolar plate pasting and fixing fixture includes a base plate 2, a fixing plate 3, a limiting plate 4, a hydrogen inlet positioning block 5, a hydrogen outlet positioning block 501, a coolant inlet positioning block 601, a coolant outlet positioning block 6, an air inlet positioning block 701, and an air outlet positioning block 7. A groove 21 is provided on the base plate 2, and a fixing pin 8 is provided on the base plate 2. The fixing plate 3 is arranged on the outer edge of the groove 21 of the base plate 2. This arrangement ensures that after the bipolar plate 1 is placed in the groove 21, it does not hinder the fixing plate 3 from being arranged on the base plate 2.

[0059] The bipolar plate 1 is arranged in the groove 21, and the bipolar plate 1 is the pasting and fixing target of the clamp. The shape of the groove 21 matches the outer size of the bipolar plate 1. A limiting hole A22, a limiting hole B23, and a limiting hole C24 are arranged on one side of the groove 21. A hollow B11, a hollow C12, and a hollow D13 are arranged on one side of the bipolar plate 1. A hollow E1101, a hollow F1201, and a hollow G1301 are arranged on the other side of the bipolar plate 1. A limiting hole D220 is arranged on the other side of the groove 21. 1, limiting hole E2301, limiting hole F2401, the limiting hole A22 is located below the hollow B11, the limiting hole B23 is located below the hollow C12, the limiting hole C24 is located below the hollow D13, the limiting hole D2201 is located below the hollow E1101, the limiting hole E2301 is located below the hollow F1201, the limiting hole F2401 is located below the hollow G1301, the limiting plate 4 is arranged on the flow field area 16 of the bipolar plate 1, and the bipolar plate 1 is provided with a sealing strip 9. The thickness of the bottom plate 2 is 6mm. The limiting hole A22, the limiting hole B23, the limiting hole C24, the limiting hole D2201, the limiting hole E2301, and the limiting hole F2401 are rounded blind holes with a side length (length and width are the same) of 3mm and a depth of 3mm.

[0060] The sealing strip 9 (sealing strip) is made of silicone or silicone rubber. After the sealing strip 9 is set on the bipolar plate 1, the top height of the sealing strip 9 is greater than the top height of the bipolar plate 1, because when the battery stack is assembled, the sealing strip 9 needs to be compressed to achieve the sealing effect; the hydrogen inlet positioning block 5 and the hydrogen outlet positioning block 501, the coolant outlet positioning block 6 and the coolant inlet positioning block 601, and the air outlet positioning block 7 and the air inlet positioning block 701 can be placed interchangeably. The sealing strip 9 is a sealing rubber line, wherein the gaps between the hydrogen inlet positioning block 5, the coolant outlet positioning block 6, and the air outlet positioning block 7, the gaps between the hydrogen inlet positioning block 5, the coolant outlet positioning block 6, the air outlet positioning block 7 and the fixed plate 3, the limiting plate 4, the gaps between the hydrogen outlet positioning block 501, the coolant inlet positioning block 601, the air inlet positioning block 701, the gaps between the hydrogen outlet positioning block 501, the coolant inlet positioning block 601, the air inlet positioning block 701 and the fixed plate 3, the limiting plate 4, and the gap between the fixed plate 3 and the limiting plate 4 are all filled and sealed by the sealing strip 9.

[0061] The hydrogen inlet positioning block 5 is set at the hollow B11, the coolant outlet positioning block 6 is set at the hollow C12, the air outlet positioning block 7 is set at the hollow D13, the hydrogen outlet positioning block 501 is set at the hollow E1101, the coolant inlet positioning block 601 is set at the hollow F1201, and the air inlet positioning block 701 is set at the hollow G1301.

[0062] The fixed plate 3 is provided with a hollow A31, and the limiting plate 4 is placed in the hollow A31. The length and width of the hollow A31 on the fixed plate 3 match the outer dimensions of the sealing strip 9. The thickness of the hollow A31 is 4 mm. A limiting groove 32 is provided at the hollow A31. The thickness of the limiting groove 32 is 2 / 3 of the thickness of the bipolar plate 1. The length and width of the limiting groove 32 match the length and width of the bipolar plate 1. The sum of the thickness of the limiting groove 32 and the thickness of the groove 21 is equal to the thickness of the bipolar plate 1. Among them, the thickness of the hollow A31 is h1, the thickness of the limiting groove 32 is h2, and the thickness of the fixed plate 3 is h3, h1+h2=h3. When the fixed plate 3 is set, the limiting groove 32 is placed in the direction of the bipolar plate 1.

[0063] The limiting plate 4 is provided with limiting holes G41 , the length and width of which match the size of the inner cavity 94 of the sealing strip 9 , and the limiting holes G41 are rounded rectangular blind holes, and the number of the limiting holes G41 is 6.

[0064] The bottom plate 2 is provided with a limit hole H25, and the fixing pin 8 is an asymmetric U-shaped structure, one end of the fixing pin 8 extends into the limit hole H25 to form a connection, and the other end of the fixing pin 8 extends into the limit hole G41 to form a connection. The number of fixing pins 8 corresponds to the number of limit holes G41.

[0065] The hydrogen inlet positioning block 5 is provided with a first step A51, a second step A52, and a limiting column A53. The first step A51 is connected to one end of the second step A52, and the other end of the second step A52 is connected to the limiting column A53. The outer dimensions of the first step A51 match the dimensions of the hydrogen inlet sealing cavity 91 and the hydrogen outlet sealing cavity 9101 of the sealing strip 9. The thickness of the first step A51 is the same as h1. The outer dimensions of the second step A52 match the inner dimensions of the hollow B11. The thickness of the second step A52 matches the thickness of the hollow B11, the limiting column A53 extends into the limiting hole A22 to form a connection, and the hydrogen outlet positioning block 501 has the same structure and connection method as the hydrogen inlet positioning block 5; that is, the hydrogen outlet positioning block 501 is provided with a first step A51, a second step A52, and a limiting column A53, the hydrogen outlet positioning block 501 is arranged corresponding to the hollow E1101, and the limiting column A53 of the hydrogen outlet positioning block 501 extends into the limiting hole D2201 to form a connection.

[0066] The coolant outlet positioning block 6 is provided with a first step B61, a second step B62, and a limiting column B63. The first step B61 is connected to one end of the second step B62, and the other end of the second step B62 is connected to the limiting column B63. The outer dimensions of the first step B61 match the dimensions of the coolant outlet sealing cavity 92 and the coolant inlet sealing cavity 9201 of the sealing strip 9. The thickness of the first step B61 is the same as h1. The outer dimensions of the second step B62 match the dimensions of the hollow C12. The thickness of the second step B62 matches the thickness of the hollow C12, the limiting column B63 extends into the limiting hole B23 to form a connection, and the coolant inlet positioning block 601 has the same structure and connection method as the coolant outlet positioning block 6; that is, the coolant inlet positioning block 601 is provided with a first step B61, a second step B62, and a limiting column B63, the coolant inlet positioning block 601 is arranged corresponding to the hollow F1201, and the limiting column B63 of the coolant inlet positioning block 601 extends into the limiting hole E2301 to form a connection.

[0067] The air outlet positioning block 7 is provided with a first step C71, a second step C72, and a limiting column C73. The first step C71 is connected to one end of the second step C72, and the other end of the second step C72 is connected to the limiting column C73. The outer size of the first step C71 matches the size of the air outlet sealing cavity 93 and the air inlet and outlet sealing cavity 9301 of the sealing strip 9. The thickness of the first step C71 is the same as h1. The outer size of the second step C72 matches the size of the hollow D13. The second step C The thickness of 72 matches the thickness of hollow D13, the limiting column C73 extends into the limiting hole C24 to form a connection, the limiting column C73 has a height of 2.5 mm, and the air inlet positioning block 701 has the same structure and connection method as the air outlet positioning block 7; that is, the air inlet positioning block 701 is provided with a first step C71, a second step C72, and a limiting column C73, the air inlet positioning block 701 is provided corresponding to the hollow G1301, and the limiting column C73 of the air inlet positioning block 701 extends into the limiting hole F2401 to form a connection.

[0068] The base plate 2, the fixing plate 3, the limiting plate 4, the hydrogen inlet positioning block 5, the hydrogen outlet positioning block 501, the coolant inlet positioning block 601, the coolant outlet positioning block 6, the air inlet positioning block 701, the air outlet positioning block 7, and the fixing pin 8 are made of water glass.

[0069] A fuel cell bipolar plate pasting and fixing fixture can be used for one or both of the cathode side gas sealing and the anode side gas sealing of the bipolar plate 1.

[0070] A fuel cell bipolar plate pasting and fixing fixture can be used for pasting and fixing graphite bipolar plates.

[0071] Example 3

[0072] like Figures 1 to 19 As shown, a fuel cell bipolar plate pasting and fixing fixture includes a base plate 2, a fixing plate 3, a limiting plate 4, a hydrogen inlet positioning block 5, a hydrogen outlet positioning block 501, a coolant inlet positioning block 601, a coolant outlet positioning block 6, an air inlet positioning block 701, and an air outlet positioning block 7. A groove 21 is provided on the base plate 2, and a fixing pin 8 is provided on the base plate 2. The fixing plate 3 is arranged on the outer edge of the groove 21 of the base plate 2. This arrangement ensures that after the bipolar plate 1 is placed in the groove 21, it does not hinder the fixing plate 3 from being arranged on the base plate 2.

[0073] The bipolar plate 1 is arranged in the groove 21, and the bipolar plate 1 is the pasting and fixing target of the clamp. The shape of the groove 21 matches the outer size of the bipolar plate 1. A limiting hole A22, a limiting hole B23, and a limiting hole C24 are arranged on one side of the groove 21. A hollow B11, a hollow C12, and a hollow D13 are arranged on one side of the bipolar plate 1. A hollow E1101, a hollow F1201, and a hollow G1301 are arranged on the other side of the bipolar plate 1. A limiting hole D220 is arranged on the other side of the groove 21. 1, limiting hole E2301, limiting hole F2401, the limiting hole A22 is located below the hollow B11, the limiting hole B23 is located below the hollow C12, the limiting hole C24 is located below the hollow D13, the limiting hole D2201 is located below the hollow E1101, the limiting hole E2301 is located below the hollow F1201, the limiting hole F2401 is located below the hollow G1301, the limiting plate 4 is arranged on the flow field area 16 of the bipolar plate 1, and the bipolar plate 1 is provided with a sealing strip 9. The thickness of the bottom plate 2 is 6mm. The limiting hole A22, the limiting hole B23, the limiting hole C24, the limiting hole D2201, the limiting hole E2301, and the limiting hole F2401 are rounded blind holes with a side length (length and width are the same) of 3mm and a depth of 3mm.

[0074] The sealing strip 9 (sealing strip) is made of silicone or silicone rubber. After the sealing strip 9 is set on the bipolar plate 1, the top height of the sealing strip 9 is greater than the top height of the bipolar plate 1, because when the battery stack is assembled, the sealing strip 9 needs to be compressed to achieve the sealing effect; the hydrogen inlet positioning block 5 and the hydrogen outlet positioning block 501, the coolant outlet positioning block 6 and the coolant inlet positioning block 601, and the air outlet positioning block 7 and the air inlet positioning block 701 can be placed interchangeably. The sealing strip 9 is a sealing rubber line, wherein the gaps between the hydrogen inlet positioning block 5, the coolant outlet positioning block 6, and the air outlet positioning block 7, the gaps between the hydrogen inlet positioning block 5, the coolant outlet positioning block 6, the air outlet positioning block 7 and the fixed plate 3, the limiting plate 4, the gaps between the hydrogen outlet positioning block 501, the coolant inlet positioning block 601, the air inlet positioning block 701, the gaps between the hydrogen outlet positioning block 501, the coolant inlet positioning block 601, the air inlet positioning block 701 and the fixed plate 3, the limiting plate 4, and the gap between the fixed plate 3 and the limiting plate 4 are all filled and sealed by the sealing strip 9.

[0075] The hydrogen inlet positioning block 5 is set at the hollow B11, the coolant outlet positioning block 6 is set at the hollow C12, the air outlet positioning block 7 is set at the hollow D13, the hydrogen outlet positioning block 501 is set at the hollow E1101, the coolant inlet positioning block 601 is set at the hollow F1201, and the air inlet positioning block 701 is set at the hollow G1301.

[0076] The fixed plate 3 is provided with a hollow A31, and the limiting plate 4 is placed in the hollow A31. The length and width of the hollow A31 on the fixed plate 3 match the outer dimensions of the sealing strip 9. The thickness of the hollow A31 is 3mm. A limiting groove 32 is provided at the hollow A31. The thickness of the limiting groove 32 is 1 / 2 of the thickness of the bipolar plate 1. The length and width of the limiting groove 32 match the length and width of the bipolar plate 1. The sum of the thickness of the limiting groove 32 and the thickness of the groove 21 is equal to the thickness of the bipolar plate 1. Among them, the thickness of the hollow A31 is h1, the thickness of the limiting groove 32 is h2, and the thickness of the fixed plate 3 is h3, h1+h2=h3. When the fixed plate 3 is set, the limiting groove 32 is placed in the direction of the bipolar plate 1.

[0077] The limiting plate 4 is provided with limiting holes G41 , the length and width of which match the size of the inner cavity 94 of the sealing strip 9 , and the limiting holes G41 are rounded rectangular blind holes, and the number of the limiting holes G41 is 4.

[0078] The bottom plate 2 is provided with a limit hole H25, and the fixing pin 8 is an asymmetric U-shaped structure, one end of the fixing pin 8 extends into the limit hole H25 to form a connection, and the other end of the fixing pin 8 extends into the limit hole G41 to form a connection. The number of fixing pins 8 corresponds to the number of limit holes G41.

[0079] The hydrogen inlet positioning block 5 is provided with a first step A51, a second step A52, and a limiting column A53. The first step A51 is connected to one end of the second step A52, and the other end of the second step A52 is connected to the limiting column A53. The outer dimensions of the first step A51 match the dimensions of the hydrogen inlet sealing cavity 91 and the hydrogen outlet sealing cavity 9101 of the sealing strip 9. The thickness of the first step A51 is the same as h1. The outer dimensions of the second step A52 match the inner dimensions of the hollow B11. The thickness of the second step A52 matches the thickness of the hollow B11, the limiting column A53 extends into the limiting hole A22 to form a connection, and the hydrogen outlet positioning block 501 has the same structure and connection method as the hydrogen inlet positioning block 5; that is, the hydrogen outlet positioning block 501 is provided with a first step A51, a second step A52, and a limiting column A53, the hydrogen outlet positioning block 501 is arranged corresponding to the hollow E1101, and the limiting column A53 of the hydrogen outlet positioning block 501 extends into the limiting hole D2201 to form a connection.

[0080] The coolant outlet positioning block 6 is provided with a first step B61, a second step B62, and a limiting column B63. The first step B61 is connected to one end of the second step B62, and the other end of the second step B62 is connected to the limiting column B63. The outer dimensions of the first step B61 match the dimensions of the coolant outlet sealing cavity 92 and the coolant inlet sealing cavity 9201 of the sealing strip 9. The thickness of the first step B61 is the same as h1. The outer dimensions of the second step B62 match the dimensions of the hollow C12. The thickness of the second step B62 matches the thickness of the hollow C12, the limiting column B63 extends into the limiting hole B23 to form a connection, and the coolant inlet positioning block 601 has the same structure and connection method as the coolant outlet positioning block 6; that is, the coolant inlet positioning block 601 is provided with a first step B61, a second step B62, and a limiting column B63, the coolant inlet positioning block 601 is arranged corresponding to the hollow F1201, and the limiting column B63 of the coolant inlet positioning block 601 extends into the limiting hole E2301 to form a connection.

[0081] The air outlet positioning block 7 is provided with a first step C71, a second step C72, and a limiting column C73. The first step C71 is connected to one end of the second step C72, and the other end of the second step C72 is connected to the limiting column C73. The outer size of the first step C71 matches the size of the air outlet sealing cavity 93 and the air inlet and outlet sealing cavity 9301 of the sealing strip 9. The thickness of the first step C71 is the same as h1. The outer size of the second step C72 matches the size of the hollow D13. The second step C The thickness of 72 matches the thickness of hollow D13, the limiting column C73 extends into the limiting hole C24 to form a connection, the limiting column C73 has a height of 2.5 mm, and the air inlet positioning block 701 has the same structure and connection method as the air outlet positioning block 7; that is, the air inlet positioning block 701 is provided with a first step C71, a second step C72, and a limiting column C73, the air inlet positioning block 701 is provided corresponding to the hollow G1301, and the limiting column C73 of the air inlet positioning block 701 extends into the limiting hole F2401 to form a connection.

[0082] The base plate 2, the fixing plate 3, the limiting plate 4, the hydrogen inlet positioning block 5, the hydrogen outlet positioning block 501, the coolant inlet positioning block 601, the coolant outlet positioning block 6, the air inlet positioning block 701, the air outlet positioning block 7, and the fixing pin 8 are made of fiberboard.

[0083] A fuel cell bipolar plate pasting and fixing fixture can be used for one or both of the cathode side gas sealing and the anode side gas sealing of the bipolar plate 1.

[0084] A fuel cell bipolar plate pasting and fixing fixture can be used for pasting and fixing composite bipolar plates.

[0085] The installation method of the clamp of the present invention is as follows: the bipolar plate 1 is placed in the groove 21 to form an assembly A; after the limiting groove 32 of the fixing plate 3 faces the assembly A, the corresponding position is placed on the assembly A to obtain an assembly B; the hydrogen inlet positioning block 5, the coolant outlet positioning block 6, the air outlet positioning block 7, the hydrogen outlet positioning block 501, the coolant inlet positioning block 601, and the air inlet positioning block 701 are respectively placed at the corresponding positions on the bipolar plate 1 to obtain an assembly C; the limiting plate 4 is placed correspondingly on the flow field area 16 of the bipolar plate 1, and then the sealing strip 9 is used to fill the gap, and the fixing pins 8 are used to connect the bottom plate 2 and fix the limiting plate 4, thereby completing the installation of the fixing clamp of the present invention.

[0086] For the fixing fixture of the present invention, the positions and gap sizes between the bipolar plate 1, the bottom plate 2, the fixing plate 3, the limiting plate 4, the hydrogen inlet positioning block 5, the coolant outlet positioning block 6, the air outlet positioning block 7, the hydrogen outlet positioning block 501, the coolant inlet positioning block 601, and the air inlet positioning block 701 can be adjusted according to production needs, and the shape of the sealing strip 9 can be adjusted according to production needs to correspond to the position adjustment of the above components.

Claims

1. A fuel cell bipolar plate pasting and fixing fixture, characterized in that: The invention comprises a bottom plate (2), a fixing plate (3), a limiting plate (4), a hydrogen inlet positioning block (5), a hydrogen outlet positioning block (501), a coolant inlet positioning block (601), a coolant outlet positioning block (6), an air inlet positioning block (701), and an air outlet positioning block (7); the bottom plate (2) is provided with a groove (21); the bottom plate (2) is provided with a fixing pin (8); and the fixing plate (3) is arranged on the outer edge of the groove (21) of the bottom plate (2); A bipolar plate (1) is arranged in the groove (21); the shape of the groove (21) matches the outer dimensions of the bipolar plate (1); a limiting hole A (22), a limiting hole B (23), and a limiting hole C (24) are arranged on one side of the groove (21); a hollow B (11), a hollow C (12), and a hollow D (13) are arranged on one side of the bipolar plate (1); a hollow E (1101), a hollow F (1201), and a hollow G (1301) are arranged on the other side of the bipolar plate (1); a limiting hole D (2201), a limiting hole E (2301), and a hollow G (1301) are arranged on the other side of the groove (21); 01), a limiting hole F (2401), the limiting hole A (22) is located below the hollow B (11), the limiting hole B (23) is located below the hollow C (12), the limiting hole C (24) is located below the hollow D (13), the limiting hole D (2201) is located below the hollow E (1101), the limiting hole E (2301) is located below the hollow F (1201), the limiting hole F (2401) is located below the hollow G (1301), the limiting plate (4) is arranged on the flow field area (16) of the bipolar plate (1), and a sealing strip (9) is arranged on the bipolar plate (1); The limiting plate (4) is provided with limiting holes G (41), the length and width of the limiting plate (4) match the size of the inner cavity (94) of the sealing strip (9), the limiting holes G (41) are any one of rounded rectangular blind holes and elliptical blind holes, and the number of the limiting holes G (41) is 2-6; The bottom plate (2) is provided with a limiting hole H (25), the fixing pin (8) is an asymmetric U-shaped structure, one end of the fixing pin (8) extends into the limiting hole H (25) to form a connection, and the other end of the fixing pin (8) extends into the limiting hole G (41) to form a connection.

2. A fuel cell bipolar plate pasting and fixing fixture as claimed in claim 1, characterized in that: The hydrogen inlet positioning block (5) is arranged at the hollow B (11), the coolant outlet positioning block (6) is arranged at the hollow C (12), the air outlet positioning block (7) is arranged at the hollow D (13), the hydrogen outlet positioning block (501) is arranged at the hollow E (1101), the coolant inlet positioning block (601) is arranged at the hollow F (1201), and the air inlet positioning block (701) is arranged at the hollow G (1301).

3. A fuel cell bipolar plate pasting and fixing fixture as claimed in claim 1, characterized in that: The fixing plate (3) is provided with a hollow A (31), the limiting plate (4) is placed in the hollow A (31), the length and width of the hollow A (31) on the fixing plate (3) match the outer dimensions of the sealing strip (9), the thickness of the hollow A (31) is 2-6 mm, a limiting groove (32) is provided at the hollow A (31), the thickness of the limiting groove (32) is 1 / 2-2 / 3 of the thickness of the bipolar plate (1), the length and width of the limiting groove (32) match the length and width of the bipolar plate (1), and the sum of the thickness of the limiting groove (32) and the thickness of the groove (21) is equal to the thickness of the bipolar plate (1).

4. A fuel cell bipolar plate pasting and fixing fixture as claimed in claim 1, characterized in that: The hydrogen inlet positioning block (5) is provided with a first step A (51), a second step A (52), and a limiting column A (53); the outer dimensions of the first step A (51) match the dimensions of the hydrogen inlet sealing inner cavity (91) of the sealing strip (9); the outer dimensions of the second step A (52) match the dimensions of the inner cavity of the hollow B (11); the limiting column A (53) extends into the limiting hole A (22) to form a connection; the hydrogen outlet positioning block (501) has the same structure and connection method as the hydrogen inlet positioning block (5).

5. A fuel cell bipolar plate pasting and fixing fixture as claimed in claim 1, characterized in that: The coolant outlet positioning block (6) is provided with a first step B (61), a second step B (62), and a limiting column B (63); the outer dimensions of the first step B (61) match the dimensions of the coolant outlet sealing inner cavity (92) of the sealing strip (9); the outer dimensions of the second step B (62) match the dimensions of the hollow C (12); the limiting column B (63) extends into the limiting hole B (23) to form a connection; the coolant inlet positioning block (601) has the same structure and connection method as the coolant outlet positioning block (6).

6. A fuel cell bipolar plate pasting and fixing fixture as claimed in claim 2, characterized in that: The air outlet positioning block (7) is provided with a first step C (71), a second step C (72), and a limiting column C (73); the outer dimensions of the first step C (71) match the dimensions of the air outlet sealing inner cavity (93) of the sealing strip (9); the outer dimensions of the second step C (72) match the dimensions of the hollow D (13); the limiting column C (73) extends into the limiting hole C (24) to form a connection; the air inlet positioning block (701) has the same structure and connection method as the air outlet positioning block (7).

7. A fuel cell bipolar plate pasting and fixing fixture as claimed in claim 1, characterized in that: The base plate (2), the fixing plate (3), the limiting plate (4), the hydrogen inlet positioning block (5), the hydrogen outlet positioning block (501), the coolant inlet positioning block (601), the coolant outlet positioning block (6), the air inlet positioning block (701), the air outlet positioning block (7), and the fixing pin (8) are made of one or more of aluminum alloy, water glass, and fiberboard.

8. A fuel cell bipolar plate pasting and fixing fixture according to any one of claims 1 to 7, characterized in that: The fuel cell bipolar plate pasting and fixing fixture can be used for one or both of the cathode side gas sealing and the anode side gas sealing of the bipolar plate (1).

9. A fuel cell bipolar plate pasting and fixing fixture according to any one of claims 1 to 7, characterized in that: The fuel cell bipolar plate pasting and fixing fixture can be used for pasting and fixing one or more of graphite bipolar plates, metal bipolar plates, and composite bipolar plates.

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