Fuel cell stack shell, stack assembly and fuel cell

Abstract

The utility model relates to the field of fuel cells, and provides a fuel cell stack shell, a stack assembly and a fuel cell. The fuel cell stack shell comprises a shell body, an accommodating space for accommodating a stack is formed in the shell body, and a ventilation shell is arranged on the shell body; the first waterproof ventilation piece is arranged on the ventilation shell; the second waterproof breathable piece is arranged on the shell; and the first waterproof breathable piece and the second waterproof breathable piece are arranged in a staggered manner along the height direction of the shell. The fuel cell stack shell can realize dual waterproof and breathable functions; and natural convection of gas can be formed under the action of the temperature difference between the inside and outside of the galvanic pile and the height difference between an airflow inlet and an airflow outlet, so that active ventilation and heat dissipation of the galvanic pile can be formed, and the hydrogen dilution cost, the explosion-proof cost and the IP67 cost of the galvanic pile are further reduced.

Description

Technical Field

[0001] The utility model relates to the field of fuel cells, and provides a fuel cell stack housing, a stack assembly and a fuel cell. Background Art

[0002] A hydrogen fuel cell is a new energy battery based on the basic principle that hydrogen and oxygen undergo an electrochemical reaction to generate electric energy and heat under specific conditions, and its reaction device is called a stack; during the application of a hydrogen fuel cell, a package is usually designed for the stack to improve its applicability. In order to enable the stack to have suitable operating conditions, it is usually required that the stack package meet the protection level requirements of IP67 and the hydrogen safety requirements of hydrogen dilution and explosion protection.

[0003] In related technologies, a blower is usually used for forced air supply or exhaust, or an air compressor air supply branch is used for forced purging to dilute and discharge hydrogen. The above solutions require additional equipment, resulting in an increase in the hydrogen dilution cost and explosion protection cost of the fuel cell stack. Summary of the Utility Model

[0004] An embodiment of the utility model provides a fuel cell stack housing, which is used to solve the defect of increased hydrogen dilution cost of the fuel cell stack in related technologies, realize the active heat dissipation of the fuel cell stack, and reduce the hydrogen dilution cost, explosion protection cost and IP67 cost of the fuel cell stack.

[0005] An embodiment of the utility model also provides a fuel cell.

[0006] An embodiment of the first aspect of the utility model provides a fuel cell stack housing, including:

[0007] A housing, an accommodation space for accommodating a stack is formed inside the housing, and a ventilation housing is arranged on the housing;

[0008] A first waterproof and breathable component, arranged on the ventilation housing;

[0009] A second waterproof and breathable component, arranged on the housing;

[0010] Along the height direction of the housing, the first waterproof and breathable component and the second waterproof and breathable component are arranged in a staggered manner.

[0011] According to an embodiment of the utility model, a ventilation duct is arranged inside the housing, and the ventilation duct is fluidly connected between the ventilation housing and the second waterproof and breathable component.

[0012] According to an embodiment of the utility model, a ventilation opening is formed on the ventilation housing, and the first waterproof and breathable component is arranged at a position corresponding to the ventilation opening.

[0013] According to an embodiment of the present utility model, an opening is provided on the housing, and the second waterproof and breathable member is disposed in the opening.

[0014] According to an embodiment of the present utility model, the ventilation housing is disposed at the top of the housing and close to the first side wall of the housing, the opening is provided on the second side wall of the housing, and the first side wall and the second side wall are oppositely disposed.

[0015] According to an embodiment of the present utility model, the volume of the accommodation space is 1.2 to 2 times the volume of the fuel cell stack.

[0016] According to an embodiment of the present utility model, the housing is an aluminum alloy housing.

[0017] According to an embodiment of the present utility model, a positioning member is disposed in the housing, and the fuel cell stack is adapted to be installed in the housing through the positioning member.

[0018] An embodiment of the second aspect of the present utility model provides a fuel cell stack assembly, including a fuel cell stack and the above-mentioned fuel cell stack housing, and the fuel cell stack is disposed in the accommodation space.

[0019] An embodiment of the third aspect of the present utility model provides a fuel cell, including the above-mentioned fuel cell stack housing,

[0020] or the above-mentioned fuel cell stack assembly.

[0021] According to the fuel cell stack housing provided by the first aspect embodiment of the present utility model, by providing a first waterproof and breathable member and a second waterproof and breathable member, the housing provides a dual waterproof and breathable function. This design can effectively prevent moisture or other liquids from entering the stack interior, while allowing gas exchange between the interior and exterior of the housing to maintain internal air pressure balance. Along the height direction of the housing, the first waterproof and breathable member and the second waterproof and breathable member are arranged in a staggered manner. This layout not only optimizes the structural design of the housing, but also enhances the waterproof and breathable effect. By providing breathable members at different positions, the risk of failure due to overuse at a single position is reduced. Through reasonable waterproof and breathable design, the housing can protect the stack from external environmental interference, reduce the decline or damage of the stack performance caused by the intrusion of moisture or other liquids, thereby improving the stability and reliability of the stack. The setting of the waterproof and breathable member helps prevent corrosion or damage to the interior of the housing caused by air pressure changes or moisture accumulation, thereby extending the service life of the fuel cell stack housing. In the extreme case of fuel gas accumulation and explosion inside the stack, the design of the waterproof and breathable member can also play a certain buffering role, reducing the damage of the explosion to the housing and the surrounding environment and improving the overall safety performance. More importantly, through the above setting method, natural convection of gas can be formed under the action of the temperature difference between the inside and outside of the stack and the height difference between the air inlet and outlet of the air flow. Thus, active ventilation and heat dissipation of the stack can be achieved, and further, the hydrogen dilution cost, explosion-proof cost, and IP67 cost of the stack are reduced.

[0022] According to the stack assembly provided by the second aspect embodiment of the present utility model, by adopting the above fuel cell stack housing, the hydrogen dilution cost, explosion-proof cost, and IP67 cost of the stack can be significantly reduced through forms such as natural convection, thermal expansion, and molecular permeation and diffusion of cold shrinkage.

[0023] According to the fuel cell provided by the third aspect embodiment of the present utility model, by adopting the above fuel cell stack housing or the above stack assembly, effective isolation between the interior of the stack and the external environment is ensured, while allowing necessary gas exchange. Natural convection of gas can be formed under the action of the temperature difference between the inside and outside of the stack and the height difference between the air inlet and outlet of the air flow. Thus, the stack inside the fuel cell can be cooled without the need to additionally provide other air supply or exhaust devices, and further, the hydrogen dilution cost, explosion-proof cost, and IP67 cost of the stack are reduced. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the present utility model or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of the fuel cell stack housing provided by the present utility model with the top wall removed.

[0026] Figure 2 It is a schematic top view of the fuel cell stack housing provided by the present utility model with the top wall removed.

[0027] Figure 3 It is a schematic structural diagram of the fuel cell stack housing provided by the present utility model.

[0028] Figure 4 It is a schematic structural diagram of the fuel cell stack housing provided by the present utility model with the first waterproof and breathable component removed.

[0029] Reference numerals:

[0030] 100, housing; 102, ventilation housing; 104, first waterproof and breathable component; 106, second waterproof and breathable component; 108, ventilation opening; 110, opening; 112, positioning component; 114, fuel cell stack. Specific embodiments

[0031] The following further describes in detail the embodiments of the present utility model in conjunction with the drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0032] As Figures 1 to 4 shown, an embodiment of the first aspect of the present utility model provides a fuel cell stack housing, including a housing 100, a first waterproof and breathable component 104, and a second waterproof and breathable component 106; a receiving space for receiving a fuel cell stack 114 is formed inside the housing 100, and a ventilation housing 102 is provided on the housing 100; the first waterproof and breathable component 104 is disposed on the ventilation housing 102; the second waterproof and breathable component 106 is disposed on the housing 100; along the height direction of the housing 100, the first waterproof and breathable component 104 and the second waterproof and breathable component 106 are arranged in a staggered manner.

[0033] According to the fuel cell stack housing provided by the first aspect embodiment of the present utility model, by providing the first waterproof and breathable member 104 and the second waterproof and breathable member 106, the housing provides a dual waterproof and breathable function. This design can effectively prevent moisture or other liquids from entering the interior of the stack 114, while allowing gas exchange between the interior and exterior of the housing to maintain internal air pressure balance. Along the height direction of the housing 100, the first waterproof and breathable member 104 and the second waterproof and breathable member 106 are arranged in a staggered manner. This layout not only optimizes the structural design of the housing, but also enhances the waterproof and breathable effect. By providing breathable members at different positions, the risk of failure due to overuse at a single position is reduced. Through reasonable waterproof and breathable design, the housing can protect the stack 114 from external environmental interference, reduce the performance degradation or damage of the stack 114 caused by the intrusion of moisture or other liquids, thereby improving the stability and reliability of the stack 114. The setting of the waterproof and breathable member helps prevent corrosion or damage to the interior of the housing caused by air pressure changes or moisture accumulation, thereby extending the service life of the fuel cell stack housing. In the extreme case of fuel gas accumulation and explosion inside the stack 114, the design of the waterproof and breathable member can also play a certain buffering role, reducing the damage to the housing and the surrounding environment caused by the explosion and improving the overall safety performance. More importantly, through the above setting method, natural convection of gas can be formed under the action of the temperature difference between the inside and outside of the stack 114 and the height difference between the air inlet and outlet, thereby forming active ventilation and heat dissipation for the stack 114, and further reducing the hydrogen dilution cost, explosion-proof cost and IP67 cost for the stack 114.

[0034] Please continue to refer to Figures 1 to 4 , the housing 100 is the main part of the fuel cell stack housing, and an accommodation space for accommodating the stack 114 is formed inside it. This accommodation space needs to ensure that the stack 114 can be well fixed and protected inside.

[0035] According to an embodiment of the present utility model, the volume of the accommodation space is 1.2 to 2 times the volume of the stack 114.

[0036] The volume of the accommodation space inside the fuel cell stack housing is set to be 1.2 to 2 times the volume of the stack 114. This design takes into account the heat generated, gas expansion, and the actual operation requirements such as maintenance and replacement during the operation of the stack 114. Since the accommodation space is larger than the volume of the stack 114, this helps the heat and gas generated during the operation of the stack 114 to be more effectively exchanged through the ventilation housing 102.

[0037] By setting an accommodation space larger than the volume of the stack 114, the stack housing of this embodiment can better adapt to the heat and gas expansion generated by the stack 114 during operation, thereby improving the stability of the stack 114. The larger accommodation space and the optimized design of the waterproof and breathable components enable the stack housing to achieve efficient gas exchange while maintaining waterproof performance, thus ensuring that the stack 114 operates in the best working state.

[0038] According to an embodiment of the present invention, the housing 100 is an aluminum alloy housing 100.

[0039] Aluminum alloy has a relatively low density. Therefore, the aluminum alloy housing 100 is relatively light, which is convenient for handling and installation. At the same time, aluminum alloy has high strength and hardness, which can provide good compressive and impact resistance performance, thereby protecting the internal stack 114 from the influence of the external environment. Moreover, aluminum alloy has good thermal conductivity, which can quickly conduct the heat generated by the internal stack 114 to the external environment, helping to maintain the normal working temperature of the stack 114 and improving the thermal stability and safety of the system. The aluminum alloy housing has good corrosion resistance and can resist the erosion of environmental factors such as oxidation, acid, and alkali. In addition, the surface of the aluminum alloy housing can be treated, such as anodizing, spraying, etc., to further enhance its corrosion resistance and extend its service life.

[0040] According to an embodiment of the present invention, positioning members 112 are provided inside the housing 100, and the stack 114 is adapted to be installed in the housing 100 through the positioning members 112.

[0041] Positioning members 112 are provided inside the housing 100. The function of these positioning members 112 is to ensure that the stack 114 can be accurately and stably installed inside the housing 100. The specific shape, size, and number of the positioning members 112 may be designed according to the size, shape, and installation requirements of the stack 114 to achieve the best positioning effect. The stack 114 is installed in the housing 100 through the positioning members 112. This installation method can ensure the accurate position of the stack 114 inside the housing 100, avoiding performance degradation or safety hazards caused by improper installation.

[0042] The setting of the positioning members 112 greatly enhances the stability of the stack 114 inside the housing 100. Whether it is the vibration generated by the stack 114 during operation or the impact of the external environment, it can be effectively resisted and alleviated. Accurate positioning can ensure a uniform gap between the stack 114 and the housing, which is beneficial to heat conduction and gas exchange, thereby improving the working efficiency and service life of the stack 114. By installing through the positioning members 112, the installation process can also be simplified, the installation efficiency can be improved, and the installation cost can be reduced.

[0043] Please continue to refer to Figure 3, a ventilation housing 102 is provided on the upper part of the housing 100. The function of the ventilation housing 102 is to allow air or other gases to enter or leave the stack housing to ensure good gas exchange between the inside and the outside environment of the housing.

[0044] The first waterproof and breathable component 104 is provided on the ventilation housing 102. The main function of this waterproof and breathable component is to prevent moisture or other liquids from entering the inside of the stack housing through the ventilation housing 102 while allowing gases to pass through.

[0045] The second waterproof and breathable component 106 is provided at other positions of the housing 100. Similar to the first waterproof and breathable component 104, it also has the function of waterproof and breathability, but the two are arranged in a staggered manner in the height direction of the housing 100.

[0046] In the height direction of the housing 100, the first waterproof and breathable component 104 and the second waterproof and breathable component 106 are arranged in a staggered manner. This design aims to increase the waterproof and breathable effect and reduce the risk caused by the failure of the waterproof and breathable component at a certain position. At the same time, by arranging the first waterproof and breathable component 104 and the second waterproof and breathable component 106 in a staggered form, the gas in the stack 114 can form natural convection of the gas under the action of the temperature difference inside and outside and the height difference between the air inlet and outlet, thereby forming active ventilation and heat dissipation for the stack 114, and further reducing the heat dissipation cost of the stack 114.

[0047] According to an embodiment of the present invention, the ventilation housing 102 is provided at the top of the housing 100 and close to the first side wall of the housing 100, and an opening 110 is opened on the second side wall of the housing 100, and the first side wall and the second side wall are arranged opposite to each other.

[0048] See Figure 1 and Figure 3 , the ventilation housing 102 is provided at the top of the housing 100 and close to the first side wall of the housing 100, the opening 110 is opened on the second side wall of the housing 100, and the first side wall and the second side wall are arranged opposite to each other. Such a layout design is conducive to guiding air to pass through the opening 110 and discharge from the ventilation housing 102, thereby effectively reducing the temperature inside the housing 100.

[0049] The combined design of the ventilation housing 102 and the opening 110 provides a ventilation path inside and outside the housing 100, which helps with heat dissipation and maintains a suitable temperature inside the housing 100. In the fuel cell stack 114, this design can ensure that the stack 114 will not be damaged due to overheating during operation, thereby improving the stability and reliability of the device.

[0050] According to an embodiment of the present invention, a ventilation duct is provided inside the housing 100, and the ventilation duct is in fluid communication between the ventilation housing 102 and the second waterproof and breathable component 106.

[0051] A ventilation duct is provided inside the housing 100. The key function of this ventilation duct is to achieve air circulation between the inside and the outside environment of the housing. The design position, size, and shape of the ventilation duct are precisely calculated and optimized to ensure that it can effectively conduct gas exchange while preventing moisture or other liquids from entering. There is fluid communication between the ventilation duct and the ventilation housing 102, which means that air can enter the ventilation duct through the ventilation housing 102 and then flow to other areas inside the housing. This design allows gas exchange to occur inside the housing when needed, such as discharging accumulated exhaust gas inside or supplementing fresh air, to maintain the stability of the internal environment.

[0052] By providing a ventilation duct inside the housing 100 and achieving fluid communication with the ventilation housing 102 and the second waterproof and breathable member 106, good gas exchange between the inside and the outside environment of the housing is ensured, maintaining the internal air pressure balance; preventing moisture and other liquids from entering the inside of the housing and protecting the fuel cell stack 114 from damage; improving the stability and reliability of the fuel cell stack 114 and extending its service life.

[0053] According to an embodiment of the present utility model, a ventilation opening 108 is provided on the ventilation housing 102, and the first waterproof and breathable member 104 is disposed at a position corresponding to the ventilation opening 108.

[0054] One or more ventilation openings 108 are provided on the ventilation housing 102. These ventilation openings 108 are channels for gas circulation, allowing air or other gases to pass through. The first waterproof and breathable member 104 is disposed on the ventilation housing 102, and its position corresponds to the ventilation opening 108. This setting ensures that when the gas leaves through the ventilation opening 108, it will first pass through the first waterproof and breathable member 104.

[0055] By providing a ventilation opening 108 on the ventilation housing 102 and disposing the first waterproof and breathable member 104 at the corresponding position, the fuel cell stack housing of the embodiment of the present utility model achieves efficient gas exchange while maintaining waterproof performance. This helps to maintain the stability of the internal environment of the housing, protect the fuel cell stack 114 from the external environment, and thus improve the overall performance and reliability of the fuel cell system.

[0056] According to an embodiment of the present utility model, an opening 110 is provided on the housing 100, and the second waterproof and breathable member 106 is disposed at the opening 110.

[0057] One or more openings 110 are specifically provided on the housing 100. These openings 110 are provided to achieve the interaction function between the inside and the outside environment of the housing. The specific number, position, and size of the openings 110 may be designed and adjusted according to actual requirements and application scenarios.

[0058] The second waterproof and breathable component 106 is disposed at these openings 110. The main function of the second waterproof and breathable component 106 is to prevent moisture or other liquids from entering the interior of the housing through the openings 110 while allowing gas to flow freely. This design ensures that the interior of the housing remains dry and clean when gas exchange with the outside is required.

[0059] In a second aspect of the embodiments of the present invention, a stack assembly is provided, and the stack is disposed in an accommodation space.

[0060] According to the stack assembly provided by the second aspect of the embodiments of the present invention, by adopting the above-mentioned fuel cell stack housing, the hydrogen dilution cost, explosion-proof cost, and IP67 cost of the stack can be significantly reduced through forms such as natural convection, thermal expansion, and molecular permeation and diffusion due to cold shrinkage.

[0061] In a third aspect of the embodiments of the present invention, a fuel cell is provided, including the above-mentioned fuel cell stack housing.

[0062] According to the fuel cell provided by the third aspect of the embodiments of the present invention, by adopting the above-mentioned fuel cell stack housing, the effective isolation between the interior of the stack and the external environment is ensured, while allowing necessary gas exchange. Natural convection of gas can be formed under the action of the temperature difference inside and outside the stack and the height difference between the air inlet and outlet. Thus, the stack inside the fuel cell can be cooled without additionally arranging other air supply or exhaust devices, thereby reducing the hydrogen dilution cost, explosion-proof cost, and IP67 cost of the stack.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fuel cell stack housing, characterized in that: include: A housing (100), wherein a housing space for accommodating a battery stack is formed in the housing (100), and a ventilation shell (102) is provided on the housing (100); A first waterproof and breathable member (104), arranged on the ventilation shell (102); A second waterproof and breathable member (106), arranged on the housing (100); Along the height direction of the housing (100), the first waterproof air-permeable component (104) and the second waterproof air-permeable component (106) are arranged in a staggered manner.

2. The fuel cell stack housing according to claim 1, characterized in that: A ventilation channel is provided in the housing (100), and the ventilation channel fluid is connected between the ventilation shell (102) and the second waterproof air-permeable component (106).

3. The fuel cell stack housing according to claim 1, characterized in that: The ventilation shell (102) is provided with a ventilation hole (108), and the first waterproof air-permeable component (104) is arranged at a position corresponding to the ventilation hole (108).

4. The fuel cell stack housing according to claim 1, characterized in that: The housing (100) is provided with an opening (110), and the second waterproof and breathable component (106) is arranged in the opening (110).

5. The fuel cell stack housing according to claim 4, characterized in that: The ventilation shell (102) is arranged on the top of the shell (100) and close to the first side wall of the shell (100), and the opening (110) is opened on the second side wall of the shell (100), and the first side wall and the second side wall are arranged opposite to each other.

6. The fuel cell stack housing according to any one of claims 1 to 5, characterized in that: The volume of the accommodation space is 1.2 to 2 times the volume of the fuel cell stack.

7. The fuel cell stack housing according to any one of claims 1 to 5, characterized in that: The housing (100) is an aluminum alloy housing (100).

8. The fuel cell stack housing according to any one of claims 1 to 5, characterized in that: A positioning piece (112) is provided in the housing (100), and the battery stack is suitable for being installed on the housing (100) through the positioning piece (112).

9. A battery stack assembly, characterized in that: It comprises a fuel cell stack and a fuel cell stack casing as claimed in any one of claims 1 to 8, wherein the fuel cell stack is arranged in the accommodating space.

10. A fuel cell, characterized in that: comprising a fuel cell stack housing as claimed in any one of claims 1 to 8, Or the battery stack assembly as described in claim 9.

Images