Electric pile packaging structure and electric pile

Abstract

The utility model relates to the technical field of fuel cells, and particularly provides a galvanic pile packaging structure and a galvanic pile. The galvanic pile packaging structure comprises a packaging box body for accommodating a reactor core, a first end plate and a second end plate, one end of the packaging box body is opened to form a first opening communicated with an inner cavity of the packaging box body, and a second opening is formed in an end shell at the other end of the packaging box body; the second end plate is blocked on one side, facing the interior of the inner cavity, of the end part shell by the end part shell so as to block the second opening; the first end plate covers the first opening. According to the galvanic pile packaging structure disclosed by the utility model, the second end plate is blocked at the second opening through the end part shell at the end part of the packaging box body, and the second end plate can be fixed at the end part of the packaging box body without adopting a connecting bolt, so that the use number of the connecting bolts between the packaging box body and the end plate is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel cell technical field, especially relates to a kind of electric pile packaging structure.In addition, the utility model also relates to a kind of electric pile. BACKGROUND

[0002] The shell of fuel cell stack is usually made of high-strength, corrosion-resistant materials, such as stainless steel, aluminum or composite materials; its design needs to consider factors such as sealing, strength, thermal management and electrical insulation. The shell needs to have enough space to accommodate the various components of the fuel cell (stack), including bipolar plates, electrodes, proton exchange membranes, etc., while also ensuring that these components can be closely arranged to form an efficient electrochemical reaction environment.

[0003] In the packaging structure of the stack shell of the prior art, the top end and the bottom end of the packaging box are connected with the positive end plate and the negative end plate of the electric pile respectively to replace the traditional pull rod, binding belt and other components, to provide the electric pile with a pressing force. Because the pressing force is large (different due to different reaction areas, usually up to tens of kilonewtons), and there is a requirement for uniformity of the pressing force distribution, the number of connecting bolts between the packaging box and the negative end plate (top end) and the positive end plate (bottom end) is large, which leads to a large amount of work in the packaging operation of the stack shell, and increases the weight of the electric pile, thereby reducing the energy density of the electric pile. SUMMARY

[0004] Therefore, the utility model aims to provide an electric pile packaging structure to reduce the number of connecting bolts between the packaging box and the end plate.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0006] An electric pile packaging structure includes a packaging box for accommodating the core, and a first end plate and a second end plate; one end of the packaging box is open to form a first opening through the inner cavity of the packaging box, and the other end of the packaging box is provided with a second opening on the end shell;

[0007] The second end plate is placed on the side of the end shell facing the inside of the inner cavity by the end shell to block the second opening; the first end plate covers the first opening.

[0008] Further, the four peripheral edge parts of the first end plate are located outside the projection of the first opening on the first end plate; the end face of the side wall of the packaging box is in abutting engagement with the four peripheral edge parts of the first end plate.

[0009] Further, the first end plate comprises a base plate and a first boss formed on a side of the base plate facing the inner cavity; the first boss is embedded into the first opening, and the peripheral edge of the first end plate is located on the base plate outside the periphery of the first boss.

[0010] Further, a first sealing groove is arranged on the base plate and surrounds the first boss, and the sealing member comprises a first sealing ring arranged in the first sealing groove.

[0011] Further, the first end plate is connected to the end face of the side wall through a plurality of connecting bolts.

[0012] Further, a support guide structure for supporting the core is arranged on the inner wall of the inner cavity, and / or a load connecting port and a battery voltage detection port are arranged on the side wall of the packaging box.

[0013] Further, the peripheral edge of the second opening and the side wall of the packaging box are both provided with the end shell with a certain width, so as to block the second end plate.

[0014] Further, the second end plate comprises a main plate body and a second boss formed on a side of the main plate body facing the outside of the packaging box; the end shell is arranged at the edge of the main plate body, and the second boss is embedded into the second opening.

[0015] Further, a second sealing groove is arranged on the main plate body and surrounds the second boss, and the sealing member comprises a second sealing ring arranged in the second sealing groove.

[0016] Compared with the prior art, the electric pile packaging structure has the following advantages:

[0017] The electric pile packaging structure of the utility model, through setting the second opening on the end shell of the packaging box, when the second end plate moves from the inside of the inner cavity to the second opening, the second end plate can be arranged at the second opening by the end shell, so as to form the plugging of the second opening; in this way, without adopting the connecting bolt, the fixation of the second end plate on the end of the packaging box can be realized, so that the number of connecting bolts between the packaging box and the end plate is effectively reduced, and then the overall weight of the structural member in the electric pile is reduced, which is beneficial to the increase of the energy density of the electric pile.

[0018] In addition, the sealing member arranged between the packaging box and the end plate can improve the sealing effect between the end plate and the packaging box, so as to provide a good sealing environment for the core and is beneficial to guarantee the packaging quality of the electric pile.

[0019] In addition, the end shell is integrally formed on the side wall and arranged along the whole circumferential surface of the packaging box body like a flange structure, forming a surrounding of the second opening, so that the size of the second opening is reduced relative to the cross-sectional size of the inner cavity; in the case that the second end plate is formed in a size substantially consistent with the cross section of the inner cavity, the second end plate can be smoothly placed at the second opening by the end shell, thereby effectively plugging the second opening. The setting form of the end shell has the technical advantages of reliable structural strength and simple processing structure.

[0020] Another purpose of the utility model is to provide a kind of electric pile, the electric pile adopts the electric pile packaging structure of the utility model.The electric pile of the utility model has the technical advantages of the electric pile packaging structure described above. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings forming part of the utility model are used to provide further understanding of the utility model, and the illustrative embodiment of the utility model and its description are used to explain the utility model, and the front and rear, up and down and other orientation words involved therein are only used to show relative position relationship, and all do not constitute undue limitation on the utility model.In the drawings:

[0022] Figure 1 It is the disassembly structure schematic view of the electric pile packaging structure described in the utility model embodiment;

[0023] Figure 2 It is the three-dimensional structure schematic view of the packaging box body described in the utility model embodiment;

[0024] Figure 3 It is the three-dimensional structure schematic view of the first end plate described in the utility model embodiment;

[0025] Figure 4 It is the three-dimensional cross-sectional structure schematic view of the electric pile packaging structure described in the utility model embodiment when the press-fitted core is loaded into packaging box body;

[0026] Figure 5 It is the cross-sectional structure schematic view of the electric pile packaging structure described in the utility model embodiment.

[0027] Explanation of reference signs:

[0028] 1, packaging box body;10, inner cavity;100, support guide structure;11, first opening;12, second opening;120, end shell;13, front shell;131, positive load connection port;132, negative load connection port;14, side shell;140, battery voltage detection port;

[0029] 2, first end plate;20, base plate;21, first boss;22, first sealing groove;

[0030] 3, second end plate; 30, main plate body; 31, second boss; 32, second sealing groove;

[0031] 4, sealing element; 5, core; 51, positive plate; 510, positive electrode; 52, negative plate; 520, negative electrode. DETAILED DESCRIPTION

[0032] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0033] In the description of the utility model, it should be declared that if the terms such as 'up, down, left, right, front, back, inner and outer' indicating the orientation or positional relationship appear, it is based on the orientation or positional relationship shown in the drawing, and it is only for the convenience of describing the utility model, and it does not indicate or imply that the indicated device or element must have a specific orientation, be constructed or operated in a specific orientation, so it cannot be understood as a limitation on the utility model.

[0034] In addition, in the description of the utility model, unless otherwise explicitly limited, the terms'mounting', 'connection', 'connecting', 'connecting element' should be understood broadly.For example, the connection can be fixed connection, or detachable connection, or integrally connected, which can be mechanical connection, or electrical connection, which can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements.For those skilled in the art, the specific meaning of the above terms in the utility model can be understood in combination with the specific circumstances.In the description of the utility model, the limiting terms such as 'first, second, A, B, C and D' appear, which are only for distinguishing the same features with different positions, attribution or use, to avoid ambiguity and confusion, and cannot be understood as indicating or implying relative importance.

[0035] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0036] Embodiment one

[0037] This embodiment relates to a kind of electric pile packaging structure, can reduce the use quantity of connecting bolt between packaging box 1 and end plate;One exemplary structure as shown in Figure 1 And Figure 2 As shown.

[0038] As a whole, the electric pile packaging structure comprises a packaging box 1 for accommodating the pile core 5, and a first end plate 2 and a second end plate 3. One end of the packaging box 1 is open, forming a first opening 11 through the inner cavity 10 of the packaging box 1, and the other end of the packaging box 1 is provided with a second opening 12 on the end shell 120. The second end plate 3 is placed on the side of the end shell 120 facing the inside of the inner cavity 10, so as to block the second opening 12; and the first end plate 2 covers the first opening 11.

[0039] It should be pointed out that, based on the overall design idea described above, the technical scheme of the utility model can adopt various different specific implementation structures, forms or configuration sequences. For example, the first end plate 2 and the packaging box 1 described above can adopt different connection forms such as screwing, welding, clamping, etc.; the stacking and pressing of the pile core 5 can be performed before being loaded into the packaging box 1, or during the process of being loaded into the packaging box 1. For the parts required for the overall scheme implementation but not involved in the overall setting described above, reasonable and flexible design can be made by referring to the mature setting means in the field, the actual situation during implementation, etc. The specific implementation scheme described below in the embodiment is only one of the relatively optimal schemes formed by various combinations and changes of the above, and in actual implementation, the skilled person in the art can make flexible adjustment and improvement in combination with the actual situation. Obviously, various specific forms of combinations and changes of the above can form many schemes, and the specific implementation scheme of the embodiment is within the protection scope of the utility model.

[0040] In order to guarantee the packaging and sealing effect of the electric pile packaging structure, in the embodiment, sealing members 4 are arranged between the first end plate 2 and the packaging box 1, and between the second end plate 3 and the packaging box 1. By arranging the sealing members 4 between the packaging box 1 and the end plate, the sealing effect between the end plate and the packaging box 1 can be improved, thereby providing a good sealing environment for the pile core 5, which is beneficial to guarantee the packaging quality of the electric pile.

[0041] For the arrangement of the first end plate 2 and the second end plate 3, of course, there are various different structural schemes to choose from. In the embodiment, as shown in the drawings, Figure 3 and Figure 4As shown, the four peripheral edge portions of the first end plate 2 are all located outside the projection of the first opening 11 on the first end plate 2; in this way, the first end plate 2 will form a complete cover for the first opening 11, and the end face of the side wall of the packaging box 1 (of course, the end face located at one end of the first opening 11) will be in abutting fit with the four peripheral edge portions of the first end plate 2, thereby guaranteeing the reliability of sealing and connection. Specifically, the first end plate 2 includes a base plate 20 and a first boss 21 formed on the side of the base plate 20 facing the inner cavity 10; obviously, the four peripheral edge portions of the first end plate 2 are all located on the base plate 20 outside the periphery of the first boss 21. When the packaging is finally completed, the first boss 21 is embedded in the first opening 11, the edge portion of the base plate 20 is in abutting fit with the end face of the side wall, and the sealing of the packaging box 1 is finally completed. By providing the first boss 21 on the first end plate 2 and adopting the embedded fit form between the first boss 21 and the first opening 11, the first end plate 2 can be accurately positioned and fitted at the first opening 11, and the first boss 21 can also realize the full compression of the core 5 in the inner cavity 10; the abutting fit between the edge portion of the base plate 20 and the end face of the side wall guarantees the stability of the connection of the first end plate 2 on the packaging box 1, and also provides a good basis for the sealing between the first end plate 2 and the packaging box 1.

[0042] Based on the arrangement of the first end plate 2, the base plate 20 of the present embodiment is provided with a first sealing groove 22, and the first sealing groove 22 is arranged around the first boss 21; the sealing member 4 includes a first sealing ring arranged in the first sealing groove 22. By arranging the annular first sealing groove 22, the first sealing ring arranged in the first sealing groove 22 will be compressed by the end face of the side wall, thereby forming a good sealing effect between the base plate 20 and the side wall, and guaranteeing the good sealing state between the packaging box 1 and the first end plate 2.

[0043] It should be pointed out that before the packaging compression of the stack, the stacking height of the core 5 is greater than the height of the packaging box 1 (the height change before and after the compression is caused by the compression deformation of the sealing member 4 and the membrane electrode carbon paper in the core 5); in the packaging process of the prior art, the packaging box 1 cannot play a supporting and guiding role on the core 5 exceeding the height of the packaging box 1 during stacking and compression; by using the stack packaging structure of the present application, the stacked core 5 can be placed on the first end plate 2 first, then the second end plate 3 is placed on the top of the core 5, then the core 5 is compressed, and then the packaging box 1 is fitted. The second end plate 3 first enters the inner cavity 10 through the first opening 11, and when the second end plate 3 reaches the second opening 12, the core 5 is completely in the inner cavity 10, and the first end plate 2 also reaches the first opening 11, and then the first end plate 2 is fixed to the packaging box 1.

[0044] Based on the above, preferably, a support guide structure 100 for supporting the core 5 is arranged on the inner wall of the inner cavity 10. Arranging the support guide structure 100 on the inner wall of the inner cavity 10 (i.e. the inner wall of the side wall) can form a support for the core 5 in the inner cavity 10 and a guide effect in the stacking direction, which can improve the stability of the core 5 in the inner cavity 10. The support guide structure 100 can have various structural forms, and the support guide structure 100 of the embodiment is a long strip-shaped rib integrally formed on the side wall and arranged in the stacking direction.

[0045] From the overall introduction of the above stack packaging structure, it can be seen that the inner cavity 10 packaged by the packaging box 1, the first end plate 2 and the second end plate 3 provides a sealed environment for the core 5, which can prevent external moisture, dust and impurities from entering the fuel cell stack, and also avoid the leakage of hydrogen and oxygen, thereby ensuring the normal operation and safety of the stack. Moreover, the stack housing formed by the packaging box 1, the first end plate 2 and the second end plate 3 also plays a mechanical protection role for the fuel cell stack, so that the stack can withstand certain external force impact and vibration, and the sensitive components inside are protected from damage. The stack housing also needs to have good electrical insulation performance to prevent current leakage, protect the safety of the operator, and ensure that the high-voltage components of the fuel cell stack are isolated from the outside.

[0046] In addition, as shown in Figure 2 The cross section of the packaging box 1 of the embodiment is rectangular, so the side wall of the packaging box 1 includes a front housing 13 with a large area size and a side housing 14 with a small size. In order to facilitate the electrical connection of the stack, the front housing 13 of the embodiment is provided with a positive load connection port 131 and a negative load connection port 132, and the side housing 14 is provided with a battery voltage detection port 140.

[0047] As shown in Figure 1 In the embodiment, the first end plate 2 is used as a positive end plate, and the second end plate 3 is used as a negative end plate. A positive plate 51 is arranged between the first end plate 2 and the core 5, and the positive plate 51 is connected with a positive electrode 510 which can be arranged corresponding to the positive load connection port 131. A negative plate 52 is arranged between the second end plate 3 and the core 5, and the negative plate 52 is connected with a negative electrode 520 which is arranged corresponding to the negative load connection port 132. When the press fitting is completed, the positive electrode 510 is electrically connected with the outside through the positive load connection port 131, and the negative electrode 520 is electrically connected with the outside through the negative load connection port 132, which meets the electrical connection and testing needs of the stack packaging structure. The arrangement of the load connection ports such as the positive load connection port 131 and the negative load connection port 132, and the battery voltage detection port 140 can be used for connecting fuel, oxidant, coolant and power output, and the design of these interfaces fully considers the convenience and safety of the connection.

[0048] The connection mode of the first end plate 2 and the packaging box body 1 can be selected in various modes; for example, the first end plate 2 can be clamped and fixed on the packaging box body 1 by means of a combination of a pull rod and a clamping plate, so as to ensure that the end surface of the side wall of the packaging box body 1 and the peripheral edge portion of the first end plate 2 can be firmly abutted and matched together. However, it is preferred to be installed and fixed by connection bolts; that is, the first end plate 2 is connected to the side wall by a plurality of connection bolts. The first end plate 2 is fixed to the packaging box body 1 by connection bolts, which forms the last sealing of the inner cavity 10 and has the characteristic of reliable connection performance. In specific implementation, a plurality of through holes can be provided along the edge portion of the base plate 20, and threaded holes are provided on the end surface of the side wall of the packaging box body 1, the connection bolts are threaded through the through holes and screwed into the corresponding threaded holes, and after the connection bolts are tightened, the first end plate 2 is fixed on the packaging box body 1, and effective sealing of the first opening 11 is formed.

[0049] For the second end plate 3 and the end shell 120, the following scheme is preferably adopted. As shown in Figure 1 、 Figure 4 The end shell 120 of the embodiment is integrally connected with the side wall of the packaging box body 1, and the peripheral edge of the second opening 12 on the end shell 120 and each side wall of the packaging box body 1 are both reserved with a certain width size of the end shell 120 to block the second end plate 3; in this way, the end shell 120 is arranged in a form surrounding the second opening 12, and is arranged along the entire peripheral surface of the packaging box body 1 similar to a turned-in edge structure, forming a surrounding of the second opening 12, so that the size of the second opening 12 is reduced relative to the cross-sectional size of the inner cavity 10; in the case that the size of the second end plate 3 is substantially consistent with the cross-sectional size of the inner cavity 10, the second end plate 3 can be smoothly placed at the second opening 12 by the end shell 120, and the edge portion of the second end plate 3 is abutted and matched with the end shell 120, thereby forming effective sealing of the second opening 12. The above-mentioned setting mode of the end shell 120 has the technical advantages of reliable structural strength and simple processing and construction.

[0050] Similar to the arrangement of the first end plate 2, the second end plate 3 of the present embodiment comprises a main plate body 30, and a second boss 31 formed on the side of the main plate body 30 facing the outside of the packaging box 1; the end shell 120 is arranged at the edge of the main plate body 30, and the second boss 31 is embedded in the second opening 12 surrounded by the end shell 120. By arranging the second boss 31 on the second end plate 3, the second boss 31 and the second opening 12 are embedded and matched, which can realize the accurate positioning and matching of the second end plate 3 at the second opening 12, and ensure the stability of the second end plate 3 on the packaging box 1. Under the compression of the stack core 5 in the stacking direction, the edge of the main plate body 30 and the end shell 120 are tightly matched, which further improves the stability of the second end plate 3 on the packaging box 1, and provides a good basis for the sealing between the second end plate 3 and the packaging box 1.

[0051] In addition, the main plate body 30 of the present embodiment is provided with a second sealing groove 32, and the second sealing groove 32 is arranged around the second boss 31; the sealing member 4 comprises a second sealing ring arranged in the second sealing groove 32. By arranging the annular second sealing groove 32, the second sealing ring arranged in the second sealing groove 32 is tightly pressed by the end shell 120, so as to form a good sealing effect between the main plate body 30 and the end shell 120, and ensure the good sealing state between the packaging box 1 and the second end plate 3.

[0052] In summary, the electric pile packaging structure of the present embodiment comprises the following advantages: by arranging the second opening 12 on the end shell 120 at the end of the packaging box 1, when the second end plate 3 moves from the inside of the inner cavity 10 to the second opening 12, the second end plate 3 can be arranged at the second opening 12 by the end shell 120 to block the second opening 12; in this way, without using connecting bolts, the second end plate 3 can be fixed at the end of the packaging box 1, so as to effectively reduce the number of connecting bolts between the packaging box 1 and the end plate, and further reduce the total weight of the structural members in the electric pile, which is conducive to the increase of the energy density of the electric pile.

[0053] Embodiment two

[0054] The present embodiment relates to an electric pile, which adopts the electric pile packaging structure provided in embodiment one.

[0055] In the assembly of the electric pile of the present embodiment, the stack core 5 is first press-fitted, and then the shell (i.e. the packaging box 1) is sleeved; the alignment of the stack core 5 is ensured by the tool during the press-fitting, the tool is removed after the press-fitting is completed, and then the stack core 5 and the second end plate 3 are packaged and slid into the inner cavity 10 of the packaging box 1, and finally the first end plate 2 is fixed by the connecting bolts. The alignment of the stack core 5 is ensured by the tool during the press-fitting.

[0056] The electric pile packaging structure has the advantages that the packaging box 1 is an integrated box structure, the first end plate 2 and the second end plate 3 are part of a battery shell, and the first end plate 2 provides packaging pressure, sealing and mechanical protection for the pile core 5.

[0057] The above is only the preferred embodiment of the utility model, and the detailed configuration explanation, the specific structure setting form example or the assembly connection mode expression are all for the need of full disclosure, so as to better implement the utility model for the person skilled in the art, and not to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A stack packaging structure, characterized in that: comprising a packaging box (1) for accommodating a stack core (5), and a first end plate (2) and a second end plate (3); one end of the packaging box (1) is open, forming a first opening (11) through the inner cavity (10) of the packaging box (1), and the other end of the packaging box (1) is provided with a second opening (12) on the end shell (120); the second end plate (3) is blocked by the end shell (120) on the side of the end shell (120) facing the inside of the inner cavity (10), to block the second opening (12); the first end plate (2) covers the first opening (11).

2. The stack packaging structure according to claim 1, characterized in that: the four peripheral edge portions of the first end plate (2) are located outside the projection of the first opening (11) on the first end plate (2); the end face of the side wall of the packaging box (1) is in abutting fit with the four peripheral edge portions of the first end plate (2).

3. The stack packaging structure according to claim 2, characterized in that: the first end plate (2) comprises a base plate (20), and a first boss (21) formed on the side of the base plate (20) facing the inner cavity (10); the first boss (21) is embedded into the first opening (11), and the four peripheral edge portions of the first end plate (2) are located on the base plate (20) outside the periphery of the first boss (21).

4. The stack packaging structure according to claim 3, characterized in that: the base plate (20) is provided with a first sealing groove (22), the first sealing groove (22) is arranged around the first boss (21), and the first sealing groove (22) is provided with a first sealing ring.

5. The stack packaging structure according to claim 2, characterized in that: the first end plate (2) is connected to the end face of the side wall by a plurality of connecting bolts.

6. The stack packaging structure according to claim 1, characterized in that: the inner wall of the inner cavity (10) is provided with a support guide structure (100) for supporting the stack core (5), and / or the side wall of the packaging box (1) is provided with a load connection port and a battery voltage detection port (140).

7. The stack packaging structure according to any one of claims 1 to 6, characterized in that: a certain width of the end shell (120) is reserved between the four peripheral edges of the second opening (12) and the side wall of the packaging box (1), to block the second end plate (3).

8. The stack packaging structure according to claim 7, characterized in that: the second end plate (3) comprises a main plate body (30), and a second boss (31) formed on the side of the main plate body (30) facing the outside of the packaging box (1); the end shell (120) is blocked at the edge portion of the main plate body (30), and the second boss (31) is embedded into the second opening (12).

9. The stack packaging structure according to claim 8, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The main plate body (30) is provided with a second sealing groove (32), the second sealing groove (32) is arranged around the second boss (31), and the second sealing groove (32) is provided with a second sealing ring.

10. A stack, characterized in that: The stack adopts the stack packaging structure according to any one of claims 1 to 9.

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