CN220341262U - Exhaust structure for single cell glue injection process - Google Patents
Exhaust structure for single cell glue injection process Download PDFInfo
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- CN220341262U CN220341262U CN202321995500.4U CN202321995500U CN220341262U CN 220341262 U CN220341262 U CN 220341262U CN 202321995500 U CN202321995500 U CN 202321995500U CN 220341262 U CN220341262 U CN 220341262U
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- hole
- glue injection
- membrane electrode
- exhaust
- cavity
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- 239000003292 glue Substances 0.000 title claims abstract description 86
- 238000002347 injection Methods 0.000 title claims abstract description 64
- 239000007924 injection Substances 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000012528 membrane Substances 0.000 claims abstract description 53
- 238000007789 sealing Methods 0.000 claims abstract description 45
- 210000004027 cell Anatomy 0.000 claims abstract description 42
- 210000005056 cell body Anatomy 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 238000010248 power generation Methods 0.000 description 4
- 239000012945 sealing adhesive Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model relates to an exhaust structure for a single cell glue injection process, wherein a single cell comprises a single cell body, and the single cell body comprises an anode plate, a membrane electrode and a cathode plate which are sequentially stacked together; the single cell body is provided with a plurality of glue injection inlet channels, and sealing glue is injected into a cavity formed by the anode plate and the membrane electrode and a cavity formed by the cathode plate and the membrane electrode through the glue injection inlet channels to form a sealing structure; the exhaust structure includes: at least one first exhaust hole arranged on at least one of the anode plate and the cathode plate, and a second exhaust hole which is arranged on the membrane electrode and corresponds to the first exhaust hole; the first exhaust hole is positioned at one side of the cavity and is communicated with the cavity at the corresponding position through the second exhaust hole. In the glue injection process, the gas in each cavity can be removed, so cavitation is not generated.
Description
Technical Field
The utility model relates to the technical field of single cell glue injection processes, in particular to an exhaust structure for a single cell glue injection process.
Background
A fuel cell is a chemical device that converts chemical energy of fuel into electric energy, and is a fourth power generation technology subsequent to hydroelectric power generation, thermal power generation, and nuclear power generation. The fuel cell converts chemical energy of fuel into electric energy through electrochemical reaction, and is not limited by the Carnot cycle effect, so the efficiency is extremely high.
The single cell in the fuel cell structure unit mainly comprises a membrane electrode assembly, a cathode plate and an anode plate, wherein the membrane electrode assembly comprises a proton exchange membrane, a catalyst and a gas diffusion layer, and is a place where chemical reaction occurs; the cathode plate and the anode plate are metal polar plates with flow channels, and the main function of the cathode plate and the anode plate is to convey reaction gas, collect and conduct current and discharge water and heat generated by reaction.
However, in the process of sealing and injecting the single cell, the flowing sealing glue is shunted and advances and meets at a certain position because of various barriers on a plastic part structure or a mold design, so that gas is trapped in a cavity, and if the gas is not discharged in time or is continuously generated, the trapped gas cannot be filled, air pockets can occur, therefore, in the production and manufacturing process, the problem of air pockets cannot occur because of considering how to ensure that the sealing glue uniformly flows in each cavity of the single cell.
As a sealing structure and a sealing method of a non-welded metal plate cell disclosed in patent document CN112701315a, a cell scheme of forming a seal ring by integral glue injection is proposed, and the method uses glue injection instead of welding, thereby improving production efficiency. However, the method does not consider the design of the glue injection vent hole in the polar plate during the design, and when bubbles appear in the glue injection process, the glue injection area can generate the phenomenon that the local pressure is overlarge and exceeds the upper limit of the glue injection pressure after a certain time, so that the local glue injection cannot be successfully performed, and the sealing of the single cell is affected.
In summary, the conventional manner of injecting glue for a single cell mainly has the following problems:
1. cavitation is easy to occur in the process of injecting the sealant into the single cell, and the sealing effect of the single cell cannot be ensured;
2. the pressure of the whole glue injection process is higher due to the fact that the single cell can not timely exhaust in the process of glue injection and sealing, the process filling time is longer, the required mold locking force is larger, and the equipment process cost is higher;
3. in the process of injecting glue and sealing glue into single cells, air bubbles cannot be timely removed, and the mechanical strength of the sealing glue strip formed by injecting glue is insufficient.
Therefore, it is necessary to develop a venting structure for a cell glue injection process.
Disclosure of Invention
The utility model aims to provide an exhaust structure for a single cell glue injection process, which can exhaust gas in each cavity in the glue injection process so as to avoid cavitation.
The utility model relates to an exhaust structure for a single cell glue injection process, wherein a single cell comprises a single cell body, and the single cell body comprises an anode plate, a membrane electrode and a cathode plate which are sequentially stacked together; the single cell body is provided with a plurality of glue injection inlet channels, and sealant is injected into a cavity formed by the anode plate and the membrane electrode and a cavity formed by the cathode plate and the membrane electrode through the glue injection inlet channels to form a sealing structure; the exhaust structure includes:
at least one first exhaust hole arranged on at least one of the anode plate and the cathode plate, and a second exhaust hole which is arranged on the membrane electrode and corresponds to the first exhaust hole;
the first exhaust hole is positioned at one side of the cavity and is communicated with the cavity at the corresponding position through the second exhaust hole.
Optionally, a first exhaust hole is arranged between any two adjacent glue injection inlet channels, so that a way is provided for removing air in the glue injection process.
Optionally, the cavity formed by the anode plate and the membrane electrode is aligned with the cavity formed by the cathode plate and the membrane electrode up and down; is convenient for injecting glue.
Optionally, a sealing groove protruding towards the direction far away from the membrane electrode is arranged on the anode plate; the anode plate and the membrane electrode form the cavity through a sealing groove on the anode plate; the contact area between the anode plate and the adhesive can be increased by arranging the sealing groove, so that the tightness and the rigidity of the single cell are improved.
Optionally, a sealing groove protruding towards the direction far away from the membrane electrode is arranged on the cathode plate; the negative plate and the membrane electrode form the cavity through a sealing groove on the negative plate; the contact area of the cathode plate and the glue can be increased by arranging the sealing groove, so that the tightness and the rigidity of the single cell are improved.
Optionally, the glue inlet channel comprises:
a first hole formed in the cathode plate;
a second hole formed in the membrane electrode;
and a third hole formed in the anode plate;
the first hole, the second hole and the third hole are arranged in an up-down alignment manner; the glue injection is convenient, and the sealing structure can be ensured to be an integrated structure.
Optionally, the glue inlet channel comprises:
a first hole formed in the cathode plate;
and a second hole provided in the membrane electrode;
the first hole and the second hole are arranged in an up-down alignment manner; the glue injection is convenient, and the sealing structure can be ensured to be an integrated structure.
Optionally, the glue inlet channel comprises:
a second hole formed in the membrane electrode;
and a third hole formed in the anode plate;
the second hole and the third hole are arranged in an up-down alignment manner; the glue injection is convenient, and the sealing structure can be ensured to be an integrated structure.
Optionally, one end of the second vent extends into the chamber, and the other end of the second vent extends below the first vent; the gas in each chamber is conveniently completely discharged.
Optionally, the first exhaust hole is formed in the cathode plate; and the gas is convenient to be discharged.
The utility model has the beneficial effects that:
1. in the traditional glue injection process, a mode of exhausting air up and down is adopted, glue overflow phenomenon can occur in the process of exhausting air up and down, and the post-treatment of glue passing through the air outlet area can influence the yield of single cells. The utility model arranges the exhaust structure on the side surface, and exhaust the air through the side surface, cuts off the redundant adhesive tape after the sealing adhesive tape is formed, thereby not affecting the sealing effect of the battery, and having low process cost and higher realization performance.
2. The exhaust structure (comprising the first exhaust hole and the second exhaust hole) is beneficial to the communication of the chambers, three layers of chambers (comprising the chamber between the anode plate and the membrane electrode, the chamber between the cathode plate and the membrane electrode and the chamber between the cathode plate and the glue injection mould) are filled with glue at the same time at the beginning of glue injection, and the gas in the three chambers is converged together by the second exhaust hole on the membrane electrode and then is discharged through the first exhaust hole at the same time, so that cavitation is not generated, and the glue injection quality and the mechanical strength of the whole sealing adhesive tape are greatly improved.
Drawings
FIG. 1 is a partially cut-away view of an exhaust structure in the present embodiment;
FIG. 2 is one of the partial sectional views (without glue) of the glue inlet channel of the present embodiment;
FIG. 3 is a second partial cross-sectional view of the injection inlet channel (not injected) in the present embodiment;
FIG. 4 is a third partial cross-sectional view of the injection inlet channel (not injected) in the present embodiment;
FIG. 5 is a schematic illustration of FIG. 2 after injection;
fig. 6 is a schematic structural view of a battery cell body in the present embodiment;
in the figure: 1. a cathode plate, 2, a membrane electrode, 3, an anode plate, 4, a first exhaust hole, 5, a second exhaust hole, 6, a sealing groove, 7, a cavity, 8, a single cell body, 9, a first hole, 10, a second hole, 11, a third hole, 12 and a sealing structure;
arrows in fig. 1 indicate the direction of gas removal.
Detailed Description
Further advantages and effects of the present utility model will become readily apparent to those skilled in the art from the disclosure herein, by referring to the following description of the embodiments of the present utility model with reference to the accompanying drawings and preferred examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.
As shown in fig. 1 to 6, in the present embodiment, an exhaust structure for a cell glue injection process, wherein a cell includes a cell body 8, the cell body 8 including an anode plate 3, a membrane electrode 2 and a cathode plate 1 stacked together in order; the single cell body 8 is provided with a plurality of glue injection inlet channels, and sealant is injected into a cavity 7 formed by the anode plate 3 and the membrane electrode 2 and a cavity 7 formed by the cathode plate 1 and the membrane electrode 2 through the glue injection inlet channels to form a sealing structure 12 (in the glue injection process, the cavity between the cathode plate 1 and the glue injection mold and the two cavities 7 are injected together at the same time, namely, an integrated sealing structure comprising a water cavity sealing ring, a cathode surface sealing ring, an anode surface sealing ring and a plurality of sealing connection structures is formed). The exhaust structure includes: at least one first exhaust hole 4 arranged on at least one of the anode plate 3 and the cathode plate 1 (comprising the case that the first exhaust hole 4 is arranged on the anode plate 3 only, or the first exhaust hole 4 is arranged on the cathode plate 1 only, or the case that the first exhaust hole 4 is arranged on the anode plate 3 and the cathode plate 1 respectively), and a second exhaust hole 5 which is arranged on the membrane electrode 2 and corresponds to the first exhaust hole; the first exhaust hole is positioned at one side of the chamber 7 and is communicated with the chamber 7 at a corresponding position through the second exhaust hole 5.
As shown in fig. 1, in this embodiment, the first exhaust hole 4 is disposed on the side, and through the side exhaust, the exhaust structure (including the first exhaust hole 4 and the second exhaust hole 5) is beneficial to the communication of each cavity, and three-layer cavities (including the cavity between the anode plate and the membrane electrode, the cavity between the cathode plate and the membrane electrode, and the cavity between the cathode plate and the glue injection mold) are simultaneously filled with glue at the beginning of glue injection, and three-cavity gas is converged together by the air outlet channel of the membrane electrode and simultaneously removed, so that cavitation is not generated, and the glue injection quality and mechanical strength of the whole sealing adhesive tape are greatly improved. In addition, as the first exhaust hole 4 is arranged on the side surface, redundant adhesive tapes are cut off after the sealing adhesive tapes are formed, the sealing effect of the battery is not affected, the process cost is low, and the realization performance is higher.
In this embodiment, a first exhaust hole 4 is disposed between any two adjacent glue injection inlet channels, so as to provide a way for removing air in the glue injection process.
As shown in fig. 1 to 5, in this embodiment, the chamber 7 formed by the anode plate 3 and the membrane electrode 2 is aligned with the chamber 7 formed by the cathode plate and the membrane electrode 2; is convenient for injecting glue.
As shown in fig. 1 to 5, in this embodiment, the anode plate 3 is provided with a seal groove 6 protruding away from the membrane electrode 2; the anode plate 3 and the membrane electrode 2 form the cavity 7 through a sealing groove 6 on the anode plate; by arranging the sealing groove 6, the contact area between the anode plate 3 and the adhesive can be increased, so that the tightness and the rigidity of the single cell are improved.
As shown in fig. 1 to 5, in this embodiment, the cathode plate 1 is provided with a seal groove 6 protruding away from the membrane electrode 2; the cathode plate 1 and the membrane electrode 2 form the cavity 7 through a sealing groove 6 on the cathode plate; the contact area between the cathode plate 1 and the glue can be increased by arranging the sealing groove 6, so that the tightness and the rigidity of the single cell are improved.
As shown in fig. 2 and 5, in one example, the glue inlet channel comprises a first hole 9 open on the cathode plate 1; a second hole 10 formed in the membrane electrode 2; and a third hole 11 formed in the anode plate 3; the first hole 9, the second hole 10 and the third hole 11 are arranged in an up-down alignment; the glue injection is convenient, and the sealing structure can be ensured to be an integrated structure.
As shown in fig. 4, in one example, the glue inlet channel comprises a first hole 9 open on the cathode plate 3; and a second hole 10 opened in the membrane electrode 2; the first hole 9 and the second hole 10 are arranged in an up-down alignment; the glue injection is convenient, and the sealing structure can be ensured to be an integrated structure.
As shown in fig. 3, in an example, the glue inlet channel includes a second hole 10 formed in the membrane electrode 2; and a third hole 11 formed in the anode plate 3; the second hole 10 and the third hole 11 are arranged in an up-down alignment; the glue injection is convenient, and the sealing structure can be ensured to be an integrated structure.
As shown in fig. 1, in the present embodiment, one end of the second exhaust hole 5 extends into the chamber, and the other end of the second exhaust hole 5 extends below the first exhaust hole 4; ensures the communication of each cavity and leads the gas to be smoothly discharged out of the single cell.
As shown in fig. 1, in this embodiment, the first exhaust hole 4 is formed on the cathode plate 1; and the gas is convenient to be discharged.
The embodiments described above are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the embodiments described above, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principles of the present utility model should be made in the equivalent manner, and are included in the scope of the present utility model.
Claims (10)
1. An exhaust structure for a single cell glue injection process, wherein a single cell comprises a single cell body (8), and the single cell body (8) comprises an anode plate (3), a membrane electrode (2) and a cathode plate (1) which are sequentially stacked together; a plurality of glue injection inlet channels are formed in the single cell body (8), and sealing glue is injected into a cavity (7) formed by the anode plate (3) and the membrane electrode (2) and a cavity (7) formed by the cathode plate and the membrane electrode (2) through the glue injection inlet channels to form a sealing structure (12); the exhaust structure is characterized by comprising:
at least one first exhaust hole (4) arranged on at least one of the anode plate (3) and the cathode plate (1), and a second exhaust hole (5) which is arranged on the membrane electrode (2) and corresponds to the first exhaust hole (4);
the first exhaust hole (4) is positioned at one side of the cavity (7), and the first exhaust hole (4) is communicated with the cavity (7) at the corresponding position through the second exhaust hole (5).
2. The exhaust structure for a cell glue injection process according to claim 1, wherein: a first exhaust hole (4) is arranged between any two adjacent glue injection inlet channels.
3. The exhaust structure for a cell glue injection process according to claim 1, wherein: the cavity (7) formed by the anode plate (3) and the membrane electrode (2) is aligned with the cavity (7) formed by the cathode plate and the membrane electrode (2) up and down.
4. A vent structure for a cell glue injection process according to claim 3, wherein: a sealing groove (6) protruding towards the direction far away from the membrane electrode (2) is arranged on the anode plate (3); the anode plate (3) and the membrane electrode (2) form the cavity (7) through a sealing groove (6) on the anode plate.
5. The exhaust structure for a cell glue injection process according to claim 4, wherein: a sealing groove (6) protruding towards the direction far away from the membrane electrode (2) is arranged on the cathode plate (1); the cathode plate (1) and the membrane electrode (2) form the cavity (7) through a sealing groove (6) on the cathode plate.
6. The exhaust structure for a cell glue injection process according to claim 5, wherein: the glue injection inlet passage includes:
a first hole (9) formed in the cathode plate (1);
a second hole (10) formed in the membrane electrode (2);
and a third hole (11) formed in the anode plate (3);
the first hole (9), the second hole (10) and the third hole (11) are arranged in an up-down alignment mode.
7. The exhaust structure for a cell glue injection process according to claim 5, wherein: the glue injection inlet passage includes:
a first hole (9) formed in the cathode plate (1);
and a second hole (10) provided in the membrane electrode (2);
the first hole (9) and the second hole (10) are arranged in an up-down alignment.
8. The exhaust structure for a cell glue injection process according to claim 5, wherein: the glue injection inlet passage includes:
a second hole (10) formed in the membrane electrode (2);
and a third hole (11) formed in the anode plate (3);
the second hole (10) and the third hole (11) are arranged in an up-down alignment.
9. The exhaust structure for a cell glue injection process according to claim 5, wherein: one end of the second exhaust hole (5) extends into the cavity (7), and the other end of the second exhaust hole (5) extends to the lower part of the first exhaust hole (4).
10. The exhaust structure for a cell glue injection process according to claim 1, wherein: the first exhaust hole (4) is formed in the cathode plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321995500.4U CN220341262U (en) | 2023-07-27 | 2023-07-27 | Exhaust structure for single cell glue injection process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321995500.4U CN220341262U (en) | 2023-07-27 | 2023-07-27 | Exhaust structure for single cell glue injection process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220341262U true CN220341262U (en) | 2024-01-12 |
Family
ID=89458917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321995500.4U Active CN220341262U (en) | 2023-07-27 | 2023-07-27 | Exhaust structure for single cell glue injection process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220341262U (en) |
-
2023
- 2023-07-27 CN CN202321995500.4U patent/CN220341262U/en active Active
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