External positioning automatic dispensing sealing forming water-cooling metal bipolar plate

Abstract

The utility model discloses an external positioning automatic dispensing sealing forming water-cooling metal bipolar plate which comprises a bipolar plate body, a plurality of cavities are formed in the two ends of the bipolar plate body, and annular inner dispensing grooves are formed in the positions, located on the outer sides of the cavities, of the surface of the bipolar plate body. A plurality of dispensing runners are formed in the surface of the bipolar plate body and located in the annular inner dispensing groove, and an annular outer dispensing groove is formed in the surface of the bipolar plate body and located on the outer side of the annular inner dispensing groove. According to the utility model, the bipolar plate bodies are arranged, the outer positioning grooves are formed in the four corners and the side edges of the bipolar plate bodies, inner positioning holes in the prior art are replaced by the outer positioning grooves, and the positions of each bipolar plate body and each membrane electrode are fixed by using an insulating positioning lever and an outer positioning groove positioning mode when the electric stacking sheets are assembled; the situation that the electric pile is damaged due to large resistance when the positioning rod is pulled out is avoided. According to the external positioning mode, the follow-up stacking deviation is smaller, and the follow-up stacking process is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of metal bipolar plates, in particular to an externally positioned automatic glue dispensing sealing forming water-cooled metal bipolar plate. Background Art

[0002] Bipolar plate, also known as current collector, is one of the important components of fuel cells. It has the following functions and properties: separation of fuel and oxidant, preventing gas from penetrating; collection and conduction of current, high conductivity; designed and processed flow channels, which can evenly distribute gas to the reaction layer of the electrode for electrode reaction; ability to discharge heat and maintain uniform temperature field of the battery; corrosion resistance; impact and vibration resistance; thin thickness; light weight; low cost, easy machining, suitable for batch manufacturing, etc. However, the existing water-cooled metal bipolar plates have the following disadvantages when stacking and assembling:

[0003] 1. Since the positioning holes of the current metal bipolar plates are located inside the bipolar plates and are circular, the assembly of the traditional metal stack uses the internal positioning method to determine the relative position of the single cell. After the stack assembly is completed, the positioning rod needs to be pulled out from the inside of the positioning space. However, the internal positioning method has a large resistance when inserting and pulling out the positioning rod, which is easy to damage the stack;

[0004] 2. Traditional metal bipolar plates are sealed by first applying glue and then using glue to bond the sealing ring. This process requires manual alignment and placement of the sealing ring. The entire process is time-consuming, so the labor cost is high. The sealing ring placement process cannot be automated, and there is a risk of sealant contaminating the flow channel.

[0005] Therefore, the utility model proposes an externally positioned automatic glue dispensing sealing forming water-cooled metal bipolar plate. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and proposes an externally positioned automatic glue dispensing sealing forming water-cooled metal bipolar plate.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an externally positioned automatic glue dispensing sealing forming water-cooled metal bipolar plate, including a bipolar plate body, a plurality of chambers are opened at both ends of the bipolar plate body, an annular inner glue dispensing groove is opened on the surface of the bipolar plate body and located outside the plurality of chambers, a plurality of glue dispensing channels are opened on the surface of the bipolar plate body and located inside the annular inner glue dispensing groove, an annular outer glue dispensing groove is opened on the surface of the bipolar plate body and located outside the annular inner glue dispensing groove, a plurality of connecting grooves are opened on the surface of the bipolar plate body and located between the annular inner glue dispensing groove and the annular outer glue dispensing groove, and a plurality of external positioning grooves are opened on the side and four corners of the bipolar plate body.

[0008] Furthermore, the multiple chambers are symmetrically arranged on both sides of the bipolar plate body, and the multiple chambers all penetrate the two sides of the bipolar plate body.

[0009] Furthermore, the plurality of glue dispensing channels are connected to the annular inner glue dispensing groove, and the plurality of glue dispensing channels are distributed outside the cavity.

[0010] Furthermore, the plurality of connecting grooves are symmetrically arranged on the surface of the bipolar plate body, and the inner annular glue spotting groove and the outer annular glue spotting groove are connected through the plurality of connecting grooves.

[0011] Furthermore, a sealed space is formed between the inner annular glue dispensing groove and the outer annular glue dispensing groove.

[0012] Furthermore, the plurality of external positioning grooves are semicircular in shape, and the plurality of external positioning grooves are symmetrically arranged on the side of the bipolar plate body.

[0013] Furthermore, the bipolar plate body has a thickness of less than 3 mm.

[0014] Beneficial effects of the utility model:

[0015] 1. When the utility model is in use, the water-cooled metal bipolar plate formed by the external positioning automatic dispensing seal is provided with a bipolar plate body, and a plurality of external positioning grooves are provided at the four corners and the side positions of the bipolar plate body. The internal positioning holes of the prior art are replaced by the external positioning grooves. When assembling the battery stack, an insulating positioning rod is used to fix the position of each bipolar plate body and membrane electrode by positioning with the external positioning grooves, so as to avoid the situation where the battery stack is damaged due to the large resistance when the positioning rod is pulled out. With this external positioning method, the subsequent stacking displacement is smaller, the subsequent stacking process is simplified, and the steps of plugging and pulling out the internal positioning rod in the traditional process are eliminated. When the battery stack using the bipolar plate is subsequently subjected to vibration or vibration testing, the displacement is smaller.

[0016] 2. When the utility model is in use, the externally positioned automatic glue dispensing sealing forming water-cooled metal bipolar plate is provided with an annular inner glue dispensing groove, a glue dispensing flow channel, an annular outer glue dispensing groove and a plurality of connecting grooves. The plurality of connecting grooves connect the annular inner glue dispensing groove and the annular outer glue dispensing groove, thereby replacing the original single-slot glue dispensing and bonding sealing ring process, thereby increasing the sealing area, and the inner and outer grooves are double-sealed, reducing the influence of single-ring poor sealing caused by liquid surface tension, and can directly dispense liquid sealing rings, which are then solidified to form sealing rings, thereby realizing full automation of sealing, and can eliminate the manual arrangement and placement of sealing rings in the traditional process, effectively reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 : The overall stereogram of the utility model;

[0019] Figure 2 : Overall top view of the utility model;

[0020] Figure 3 :The utility model Figure 1 Enlarged view of point A in the middle.

[0021] The reference numerals are as follows:

[0022] 1. Bipolar plate body; 2. Chamber; 3. Annular inner glue dispensing groove; 4. Glue dispensing channel; 5. Annular outer glue dispensing groove; 6. Connection groove; 7. External positioning groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-Figure 3 As shown, it relates to an externally positioned automatic glue dispensing sealing forming water-cooled metal bipolar plate, including a bipolar plate body 1, a plurality of chambers 2 are opened at both ends of the bipolar plate body 1, an annular inner glue dispensing groove 3 is opened on the surface of the bipolar plate body 1 and located outside the plurality of chambers 2, a plurality of glue dispensing channels 4 are opened on the surface of the bipolar plate body 1 and located inside the annular inner glue dispensing groove 3, an annular outer glue dispensing groove 5 is opened on the surface of the bipolar plate body 1 and located outside the annular inner glue dispensing groove 3, a plurality of connecting grooves 6 are opened on the surface of the bipolar plate body 1 and located between the annular inner glue dispensing groove 3 and the annular outer glue dispensing groove 5, and a plurality of external positioning grooves 7 are opened on the side and four corners of the bipolar plate body 1.

[0025] The bipolar plate body 1 has a thickness less than 3 mm.

[0026] In this embodiment, the bipolar plate body 1 is formed by stamping.

[0027] The multiple chambers 2 are symmetrically arranged on both sides of the bipolar plate body 1 , and the multiple chambers 2 all penetrate the two sides of the bipolar plate body 1 .

[0028] In this embodiment, the number of chambers 2 is six, namely a hydrogen inlet chamber, a hydrogen outlet chamber, an air inlet chamber, an air outlet chamber, a water inlet chamber and a water outlet chamber.

[0029] The plurality of glue dispensing channels 4 are connected to the annular inner glue dispensing groove 3 , and the plurality of glue dispensing channels 4 are distributed outside the chamber 2 .

[0030] By connecting the glue dispensing channel 4 with the annular inner glue dispensing groove 3, when dispensing glue inside the annular inner glue dispensing groove 3, the glue will also flow into the glue dispensing channel 4, and the glue dispensing channel 4 surrounds the multiple chambers 2, thereby forming an independent seal for the multiple chambers 2.

[0031] A plurality of connection grooves 6 are symmetrically arranged on the surface of the bipolar plate body 1 , and the annular inner glue dispensing groove 3 and the annular outer glue dispensing groove 5 are connected through the plurality of connection grooves 6 .

[0032] After the annular inner glue dispensing groove 3 and the annular outer glue dispensing groove 5 are connected through the connecting groove 6, the liquid glue flows in as a whole during automatic glue dispensing, and passes through all the glue dispensing grooves at one time. The liquid glue solidifies in the glue dispensing groove and the glue dispensing flow channel 4 to form a sealing ring, and there is no need to manually place the sealing ring, which simplifies the assembly steps and improves the assembly efficiency. The manual arrangement and placement of the sealing ring in the traditional process is eliminated, and the production cost is reduced.

[0033] A sealed space is formed between the annular inner glue groove 3 and the annular outer glue groove 5. When the two bipolar plate bodies 1 are assembled together, the liquid glue in the annular inner glue groove 3 and the annular outer glue groove 5 realizes double sealing.

[0034] The plurality of external positioning grooves 7 are semicircular, and the plurality of external positioning grooves 7 are symmetrically arranged on the side of the bipolar plate body 1. The external positioning grooves 7 are respectively on the outside of the bipolar plate body 1. When positioning, it is not necessary to insert the positioning rod into the external positioning groove 7. This external positioning method has smaller deviation in subsequent stacking. When the battery stack using the bipolar plate encounters vibration or vibration testing, the deviation is smaller.

[0035] Working principle: When assembling the bipolar plate body 1, glue can be dispensed in the annular inner glue dispensing groove 3 or the annular outer glue dispensing groove 5. The liquid sealant will flow into the annular inner glue dispensing groove 3, the annular outer glue dispensing groove 5, the connecting groove 6 and the glue dispensing channel 4 at one time. After the liquid sealant solidifies, it directly forms a sealing ring to achieve fully automated sealing, eliminating the step of manually placing the sealing ring. The bipolar plate body 1 is opened with two circles of inner and outer automatic glue dispensing grooves to increase the sealing area. The liquid sealant has a greater bonding force with the bipolar plate body 1. Due to the greater bonding force, it can be cleaned after the glue solidifies. When the stack is assembled, the bipolar plate body 1 is positioned through the external positioning groove 7, and the deviation is smaller in the subsequent stacking. The battery stack using the bipolar plate will have a smaller offset when encountering vibration or vibration testing.

[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An external positioning automatic glue dispensing sealing forming water-cooled metal bipolar plate, comprising a bipolar plate body (1), characterized in that: A plurality of chambers (2) are provided at both ends of the bipolar plate body (1); an annular inner glue dispensing groove (3) is provided on the surface of the bipolar plate body (1) and is located outside the plurality of chambers (2); a plurality of glue dispensing channels (4) are provided on the surface of the bipolar plate body (1) and are located inside the annular inner glue dispensing groove (3); an annular outer glue dispensing groove (5) is provided on the surface of the bipolar plate body (1) and is located outside the annular inner glue dispensing groove (3); a plurality of connecting grooves (6) are provided on the surface of the bipolar plate body (1) and are located between the annular inner glue dispensing groove (3) and the annular outer glue dispensing groove (5); and a plurality of external positioning grooves (7) are provided on the side and four corners of the bipolar plate body (1).

2. The external positioning automatic glue dispensing sealing forming water-cooled metal bipolar plate according to claim 1, characterized in that: The plurality of chambers (2) are symmetrically arranged on both sides of the bipolar plate body (1), and the plurality of chambers (2) all penetrate the two sides of the bipolar plate body (1).

3. The external positioning automatic glue dispensing sealing forming water-cooled metal bipolar plate according to claim 1, characterized in that: The plurality of glue dispensing channels (4) are connected to the annular inner glue dispensing groove (3), and the plurality of glue dispensing channels (4) are distributed outside the chamber (2).

4. The external positioning automatic glue dispensing sealing forming water-cooled metal bipolar plate according to claim 1, characterized in that: The plurality of connection grooves (6) are symmetrically arranged on the surface of the bipolar plate body (1), and the annular inner glue spot groove (3) and the annular outer glue spot groove (5) are connected via the plurality of connection grooves (6).

5. The external positioning automatic glue dispensing sealing forming water-cooled metal bipolar plate according to claim 1, characterized in that: A sealed space is formed between the annular inner glue dispensing groove (3) and the annular outer glue dispensing groove (5).

6. The external positioning automatic glue dispensing sealing forming water-cooled metal bipolar plate according to claim 1, characterized in that: The plurality of external positioning grooves (7) are semicircular in shape, and the plurality of external positioning grooves (7) are symmetrically arranged on the side of the bipolar plate body (1).

7. The external positioning automatic glue dispensing sealing forming water-cooled metal bipolar plate according to claim 1, characterized in that: The bipolar plate body (1) has a thickness of less than 3 mm.

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