Electric pile shell, electric pile, fuel cell system and vehicle

Abstract

The utility model provides an electric pile shell, an electric pile, a fuel cell system and a vehicle, the electric pile shell comprises a shell body with an accommodating cavity, the inner wall of the shell body is provided with a plurality of bulges protruding towards the middle part of the accommodating cavity, and a mounting space for accommodating an electric pile core is defined among the bulges; the plurality of bulges can abut against the electric pile core to limit the displacement of the electric pile core in the shell body, and an insulating layer is arranged between each bulge and the electric pile core. According to the galvanic pile shell disclosed by the utility model, the plurality of bulges are propped against the galvanic pile core, the displacement of the galvanic pile core in the shell body is limited, the problem of deformation of the galvanic pile core is favorably prevented, the insulating effect between the galvanic pile core and the shell body is favorably improved by arranging the insulating layer, and compared with a scheme of independently arranging a plurality of limiting rods, the galvanic pile shell has the advantages that the structure is simple, and the cost is low. The creepage distance between the electric pile core and the electric pile shell can be effectively guaranteed, the insulation performance can be guaranteed, meanwhile, the number of parts can be reduced, and therefore the production efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a stack housing; meanwhile, the utility model also relates to a stack provided with the stack housing, a fuel cell system provided with the stack, and a vehicle provided with the fuel cell system. Background Art

[0002] A stack includes a housing and a stack core disposed inside the housing. Among them, the stack core is usually stacked by hundreds of membrane electrode assemblies and bipolar plates. There is an end plate on each side of the core, and a space for clamping the core is formed between the two end plates. In the prior art, multiple limiting rods are usually arranged between the two end plates to prevent the structure of the stack core from deforming during impact and vibration, resulting in a decrease in sealing performance, especially the problem of depression in the middle part (also known as the waist collapse problem).

[0003] However, the scheme of arranging multiple limiting rods will result in a small creepage distance between the stack core and the housing, and insulation faults are likely to occur between the stack core and the stack housing. In addition, the limiting rods need to be manufactured and assembled separately, resulting in a large number of components in the entire stack, which is not conducive to reducing production costs and improving production efficiency. Summary of the Utility Model

[0004] In view of this, the utility model aims to propose a stack housing to prevent the stack core from deforming.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A stack housing includes a housing body having a cavity. A plurality of protrusions protruding toward the middle of the cavity are provided on the inner wall of the housing body. An installation space for accommodating a stack core is defined between the plurality of protrusions; the plurality of protrusions can abut against the stack core to limit the displacement of the stack core in the housing body, and an insulating layer is provided between each protrusion and the stack core.

[0007] Further, the insulating layer includes an insulating film conforming to the inner wall of the housing body; or, the insulating layer includes a plurality of insulating films corresponding to each inner wall of the housing body one by one, and the insulating film conforms to the corresponding inner wall.

[0008] Further, the insulating film is conforming to the corresponding inner wall by thermoforming process.

[0009] Further, the insulating film is made of PC film; and / or, the thickness d of the insulating film satisfies: 0.5mm ≤ d ≤ 1mm.

[0010] Further, the insulating layer is adhesively connected to the housing body.

[0011] Furthermore, the cross-section of the shell body is rectangular; the protrusions are provided on each inner wall of the shell body. Further, the protrusions extend along the height direction of the shell body; and / or, the shell body and the protrusions are integrally formed.

[0012] Compared with the prior art, the present utility model has the following advantages:

[0013] For the fuel cell stack housing of the present utility model, by providing a plurality of protrusions on the inner wall of the shell body, and the plurality of protrusions can abut against the fuel cell stack core and limit the displacement of the fuel cell stack core in the shell body, which is beneficial to preventing the problem of deformation of the fuel cell stack core, thereby improving the performance of the fuel cell stack core. At the same time, the structural strength of the fuel cell stack housing can also be improved. And by providing an insulating layer between the protrusions and the fuel cell stack core, it is beneficial to improve the insulation effect between the fuel cell stack core and the shell body. Compared with the solution of separately providing a limiting rod, the creepage distance between the fuel cell stack core and the fuel cell stack housing can be effectively guaranteed, which is beneficial to ensuring the insulation performance. At the same time, it is also beneficial to reduce the number of components and lower the production cost, thereby improving the production efficiency.

[0014] In addition, one insulating film is arranged conformally to the inner wall of the shell body, or a plurality of insulating films are arranged conformally to the corresponding inner walls, which are all beneficial to the installation of the insulating film on the shell body and have a good insulation effect. The insulating film is arranged conformally to the corresponding inner wall through a thermoforming process, which is beneficial to improving the forming efficiency of the insulating film.

[0015] In addition, the PC film has good durability; the setting of the thickness d range of the insulating film makes the insulating film have a certain hardness, which is not only convenient to be arranged on the inner wall, but also has good wear resistance. The insulating layer is adhesively connected to the shell body, which is easy to arrange and implement. The protrusions are provided on each inner wall of the shell body, which can limit the displacement of the fuel cell stack core in both the length direction and the width direction of the cross-section of the shell body, further preventing the problem of deformation of the fuel cell stack core. The protrusions extend along the height direction of the shell body, which is easy to arrange and implement, and at the same time has a better anti-deformation effect on the fuel cell stack core; the protrusions and the shell body are integrally formed, which is beneficial to improving the processing efficiency.

[0016] In addition, another object of the present utility model is to provide a fuel cell stack, including the fuel cell stack housing as described above, a fuel cell stack core arranged in the fuel cell stack housing, and end plates arranged at both ends of the fuel cell stack core and respectively connected to the fuel cell stack housing.

[0017] For the fuel cell stack of the present utility model, by providing the fuel cell stack housing as above, it is beneficial to improve the safety of the fuel cell stack and reduce the production cost.

[0018] In addition, the present utility model also provides a fuel cell system, including the fuel cell stack as described above.

[0019] Furthermore, the present utility model also provides a vehicle, which includes the fuel cell system as described above.

[0020] The fuel cell system and the vehicle according to the present utility model have the same beneficial effects as the above-mentioned fuel cell stack, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0022] Figure 1 It is a schematic diagram of the positional relationship between the fuel cell stack housing and the fuel cell stack core according to the embodiment of the present utility model;

[0023] Figure 2 It is a schematic structural diagram of the cross-section of the fuel cell stack housing according to the embodiment of the present utility model;

[0024] Figure 3 It is a schematic structural diagram of the insulating layer according to the embodiment of the present utility model.

[0025] Description of the reference numerals in the drawings:

[0026] 1, housing body; 2, insulating layer; 3, fuel cell stack core;

[0027] 100, cavity; 101, protrusion;

[0028] 201, insulating film; 202, protruding part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0030] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, if terms such as "first" and "second" appear, they are also only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0032] This embodiment relates to a stack housing, aiming to solve the deficiencies existing in the problem of setting multiple limiting rods on the stack housing to prevent deformation of the stack core 3.

[0033] In terms of the overall structure, the stack housing includes a housing body 1 with a cavity 100. A plurality of protrusions 101 protruding towards the middle of the cavity 100 are provided on the inner wall of the housing body 1. An installation space for accommodating the stack core 3 is defined between the plurality of protrusions 101. The plurality of protrusions 101 can abut against the stack core 3 to limit the displacement of the stack core 3 within the housing body 1. An insulating layer 2 is provided between each protrusion 101 and the stack core 3.

[0034] For the stack housing described in this embodiment, by providing a plurality of protrusions 101 on the inner wall of the housing body 1, and the plurality of protrusions 101 can abut against the stack core 3 and limit the displacement of the stack core 3 within the housing body 1, it is beneficial to prevent the stack core 3 from deforming during impact and vibration, thereby improving the performance of the stack core 3 and also enhancing the structural strength of the stack housing. And by providing the insulating layer 2 between the protrusion 101 and the stack core 3, it is beneficial to improve the insulation effect between the stack core 3 and the housing body 1. Compared with the scheme of separately setting multiple limiting rods, it can effectively ensure the creepage distance between the stack core 3 and the stack housing, thus being beneficial to ensuring the insulation performance. At the same time, it is also beneficial to reduce the number of components and lower the production cost, thereby being beneficial to improving the production efficiency.

[0035] Based on the above overall introduction, an exemplary structure of the stack housing described in this embodiment is as shown in Figure 1 and Figure 2 In this embodiment, the cross-section of the housing body 1 is rectangular. Preferably, protrusions 101 are provided on each inner wall of the housing body 1. Through the cooperation of the plurality of protrusions 101 on each inner wall, it can abut against the stack core 3 in both the length direction and the width direction of the cross-section of the housing body 1 to limit the displacement of the stack core 3, which is beneficial to further preventing the stack core 3 from deforming. Among them, one protrusion 101 is provided on each of the two opposite inner walls in the length direction of the housing body 1, and two spaced-apart protrusions 101 are provided on each of the two opposite inner walls in the width direction of the housing body 1.

[0036] Of course, the cross-sectional shape of the housing body 1 can also be square, and the number and position of the protrusions 101 on each inner wall can also be adjusted adaptively according to the usage requirements. In addition, during specific implementation, protrusions 101 can also be provided only on the two opposite inner walls in the length direction of the housing body 1. At this time, the cooperation of the plurality of protrusions 101 can limit the displacement of the stack core 3 in the length direction of the housing body 1. Or protrusions 101 can also be provided only on the two opposite inner walls in the width direction of the housing body 1. At this time, the cooperation of the plurality of protrusions 101 can limit the displacement of the stack core 3 in the width direction of the housing body 1.

[0037] As a preferred embodiment, the protrusion 101 extends along the height direction of the housing body 1. This not only facilitates processing and forming, but also restricts the displacement of the stack core 3 in the height direction of the housing body 1, thus having a good anti-deformation effect. It should be noted that in addition to continuously extending along the height direction of the housing body 1, the protrusion 101 in this embodiment can also be arranged at intervals along the height direction of the housing body 1, as long as the limiting effect on the stack core 3 is satisfied.

[0038] In this embodiment, the cross-section of each protrusion 101 can be rectangular as shown in the figure, or square, trapezoidal, etc., so as to have a good limiting effect and be convenient for processing and forming. In addition, the housing body 1 and the protrusion 101 are preferably integrally formed. This not only helps to improve the connection strength between the two, but also helps to improve production efficiency. Of course, in specific implementation, the housing body 1 and the protrusion 101 can also be formed separately and then the protrusion 101 is connected to the housing body 1.

[0039] The insulating layer 2 in this embodiment includes a plurality of insulating films 201 corresponding to the inner walls of the housing body 1 one by one, and the insulating films 201 are arranged conformally to the corresponding inner walls. As Figure 2 and Figure 3 shown, there are specifically four insulating films 201 in this embodiment, and each insulating film 201 is provided with a protruding portion 202 arranged conformally to the protrusion 101. The arrangement of the plurality of insulating films 201 and the protruding portions 202 facilitates the installation of the insulating films 201 on the housing body 1 and has a good insulating effect. In specific implementation, the insulating films 201 are arranged conformally to the corresponding inner walls through a thermoforming process. This is beneficial to the processing and forming of the insulating films 201 and has a good fitting effect with the corresponding inner walls.

[0040] It can be understood that in addition to using four insulating films, the insulating layer 2 in this embodiment can also include one insulating film arranged conformally to the inner wall of the housing body 1. In this case, one insulating film can also achieve a good insulating effect.

[0041] Among them, the insulating film 201 uses a PC film in the prior art. The PC (abbreviation for Polycarbonate) film is specifically a polycarbonate film, which has good durability. It can be understood that in addition to using a PC film, the insulating film 201 can also use other materials that can withstand the working temperature of the stack housing and can be thermoformed. In addition, the thickness of the insulating film 201 can be selected according to insulation requirements and anti-cutting requirements.

[0042] As a preferred embodiment, in this embodiment, the thickness d of the insulating film 201 satisfies: 0.5 mm ≤ d ≤ 1 mm. In this way, the insulating film 201 has a certain hardness, which not only facilitates the arrangement of the insulating film 201 on the inner wall, but also has good wear resistance. Specifically, during implementation, the thickness of the insulating film 201 can be, for example, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm.

[0043] In this embodiment, the insulating layer 2 is adhesively connected to the shell body 1, which has the advantage of being convenient for arrangement and implementation. Specifically, during implementation, each insulating film 201 after thermoforming can be pasted onto the corresponding inner wall through double-sided tape. Since the material of the insulating film 201 is hard after thermoforming, it is easy to paste, has good operation convenience, and can ensure complete isolation between the core and the shell, thereby ensuring the insulation performance of the stack.

[0044] At the same time, compared with the scheme of spraying insulating paint on the shell body 1, the insulating film 201 is arranged on the shell body 1 by bonding, which can also improve the connection strength of the insulating film 201, is conducive to overcoming the problem that the insulating paint is easily scratched and worn by the stack core 3 of the stack and falls off, and has good use reliability.

[0045] For the stack housing described in this embodiment, by providing a plurality of protrusions 101 on the shell body 1, the fixing structures such as the limiting rod and the bolts for its installation are cancelled, which can reduce the production cost while effectively ensuring the creepage distance between the stack core 3 and the stack housing, and thus is conducive to ensuring the insulation performance of the stack. In addition, a plurality of insulating films 201 formed by thermoforming and conforming to the inner wall of the shell body 1 can adapt to the protrusions 101 on the inner wall of the shell body 1, and have good installation convenience, insulation and durability.

[0046] In addition, this embodiment also relates to a stack, including the stack housing as described above, a stack core 3 arranged in the stack housing, and end plates arranged at both ends of the stack core 3 and respectively connected to the stack housing.

[0047] In this embodiment, the structures of the stack core 3 and the end plates can both refer to the prior art. For example, the stack core 3 includes a plurality of single cells stacked, and the single cell is composed of a bipolar plate and a membrane electrode. Positive and negative current collector plates are respectively placed at both ends of the stack core 3 for conducting the current generated by the electrochemical reaction of the stack. One of the two end plates is a blind end plate, and the other is an air port end plate. In addition, an insulating plate is provided between each end plate and the corresponding current collector plate, and the above-mentioned components are encapsulated into the stack core 3 by applying a certain pressure through a pull rod or a strap and placed inside the stack housing to form a stack.

[0048] For the stack described in this embodiment, by providing the stack housing as above, it is conducive to improving the safety of the stack and reducing the production cost.

[0049] In addition, this embodiment also relates to a fuel cell system, including the fuel cell stack described above. In addition, this embodiment also relates to a vehicle, which includes the fuel cell system described above.

[0050] The fuel cell system and the vehicle described in this embodiment have the same beneficial effects as the above-mentioned fuel cell stack, and will not be elaborated here.

[0051] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A battery stack casing, characterized in that: It comprises a shell body (1) having a cavity (100), wherein a plurality of protrusions (101) protruding toward the middle of the cavity (100) are provided on the inner wall of the shell body (1), and an installation space for accommodating a fuel cell core (3) is defined between the plurality of protrusions (101); The plurality of protrusions (101) are capable of abutting against the fuel cell stack core (3) to limit the displacement of the fuel cell stack core (3) within the shell body (1), and an insulating layer (2) is provided between each protrusion (101) and the fuel cell stack core (3).

2. The battery stack casing according to claim 1, characterized in that: The insulating layer (2) comprises an insulating film arranged in conformity with the inner wall of the shell body (1); or, The insulating layer (2) comprises a plurality of insulating films (201) arranged in one-to-one correspondence with each inner wall of the shell body (1), and the insulating films (201) are arranged in accordance with the corresponding inner walls.

3. The battery stack casing according to claim 2, characterized in that: The insulating film (201) is formed by a vacuum forming process.

4. The stack casing according to claim 3, characterized in that: The insulating film (201) is a PC film; and / or, The thickness d of the insulating film (201) satisfies: 0.5 mm ≤ d ≤ 1 mm.

5. The stack casing according to claim 1, characterized in that: The insulating layer (2) is bonded to the shell body (1).

6. The battery stack casing according to claim 1, characterized in that: The cross section of the shell body (1) is rectangular; The protrusions (101) are provided on each inner wall of the shell body (1).

7. The stack casing according to any one of claims 1 to 6, characterized in that: The protrusion (101) is extended along the height direction of the shell body (1); and / or, The shell body (1) and the protrusion (101) are integrally formed.

8. A battery stack, characterized in that: It comprises a stack shell according to any one of claims 1 to 7, a stack core (3) arranged in the stack shell, and end plates arranged at both ends of the stack core (3) and respectively connected to the stack shell.

9. A fuel cell system, characterized in that: Comprising the battery stack described in claim 8.

10. A vehicle, characterized in that: A fuel cell system comprising the fuel cell system of claim 9.

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