CN220692081U - Fuel cell case and fuel cell system - Google Patents

Abstract

The utility model discloses a fuel cell box and a fuel cell system. The fuel cell box body comprises a first shell, a second shell and a water outlet assembly, wherein the first shell is provided with a first cavity and a first through hole which are mutually communicated, and the first cavity is used for accommodating the electric pile. The second shell is provided with a second cavity and a second through hole which are communicated with each other, and the first shell is accommodated in the second cavity. The water outlet assembly comprises a water outlet pipe and a sealing piece, the water outlet pipe is provided with a water outlet hole communicated with the first through hole, and the water outlet pipe is connected to the outer surface of the first shell in a sealing way. The sealing element is provided with the mounting hole that sets up with the second through-hole is coaxial, and the outlet pipe wears to locate second through-hole and mounting hole, and sealing element sealing connection is in the surface of second casing, and sealing element sealing connection is in the surface of outlet pipe. The cooperation of sealing member and outlet pipe provides the water outlet passage for sweeping the drainage operation to guaranteed to seal respectively first chamber and second chamber, reduced seal structure's positioning accuracy requirement, reduced the requirement that realizes sweeping the drainage operation.

Description

Fuel cell case and fuel cell system

Technical Field

The present utility model relates to the field of fuel cells, and in particular, to a fuel cell case and a fuel cell system.

Background

The main substance discharged by the hydrogen fuel cell is water vapor, and part of the hydrogen which is not utilized completely still exists in the operation process of the fuel cell and is discharged along with the water vapor. These small amounts of unreacted hydrogen can accumulate within the fuel cell housing, and the low density nature of the hydrogen can cause the hydrogen to readily accumulate in the housing, presenting a deflagration hazard. When the fuel cell is applied to the airtight space, the electric pile is accommodated in the inner shell by arranging the double shells in the related art, the outer shell is coated with the outer shell, and hydrogen leaked from the electric pile can be sealed in the outer shell to prevent danger and make a safety redundancy design. However, the arrangement of the double shells ensures the respective sealing of the inner shell and the outer shell, which makes the purging and draining of the electric pile difficult, and the accumulated water in the electric pile needs to be drained through the two shells under the condition of ensuring the respective sealing of the two shells, so that the sealing structure needs to be optimized.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the fuel cell box body, which can reduce the requirement for realizing the purging and draining operation on the basis of being provided with the double shells.

The utility model also provides a fuel cell system with the fuel cell box body.

The fuel cell box body comprises a first shell, a second shell and a water outlet assembly, wherein the first shell is provided with a first cavity and a first through hole, the first cavity is used for accommodating a galvanic pile, and the first through hole is communicated with the first cavity. The second shell is provided with a second cavity and a second through hole, the first shell is accommodated in the second cavity, and the second through hole is communicated with the second cavity. The water outlet assembly comprises a water outlet pipe and a sealing piece, the water outlet pipe is provided with a water outlet hole, the water outlet hole is communicated with the first through hole, and the water outlet pipe is connected to the outer surface of the first shell in a sealing way; the sealing element is provided with a mounting hole, the mounting hole and the second through hole are coaxially arranged, the water outlet pipe penetrates through the second through hole and the mounting hole, the sealing element is in sealing connection with the outer surface of the second shell, and the sealing element is in sealing connection with the outer surface of the water outlet pipe.

The fuel cell box body provided by the embodiment of the utility model has at least the following beneficial effects: the arrangement of the first shell and the second shell can form a double shell so as to improve the safety of the fuel cell. On the basis, the water outlet pipe can lead out the water in the first shell, and the tightness of the first cavity is ensured. The sealing member can realize the sealing of the second through hole of the second shell and the sealing between the second through hole and the water outlet pipe so as to ensure the tightness of the second cavity. The cooperation of sealing member and outlet pipe provides the water outlet channel for sweeping the drainage operation, and sealing member and outlet pipe's setting has guaranteed the seal to first chamber and second chamber respectively to reduce seal structure's positioning accuracy requirement, reduced the requirement that realizes sweeping the drainage operation.

According to some embodiments of the utility model, the water outlet assembly further comprises a first sealing ring, the sealing member comprises a first connecting part and a second connecting part which are connected with each other, the first connecting part is provided with the mounting hole, and the outer surface of the water outlet pipe is in sealing connection with the inner surface of the first connecting part; the second connecting portion is arranged around the mounting hole in the circumferential direction of the mounting hole, at least one of the second connecting portion and the outer surface of the second shell is provided with a first groove, at least one part of the first sealing ring is located in the first groove, at least one part of the first sealing ring is propped against the second connecting portion, and at least one part of the first sealing ring is propped against the second shell.

According to some embodiments of the utility model, one of the second connection portion and the outer surface of the second housing is provided with the first groove, the other is provided with a first boss, at least a portion of the first boss is located in the first groove, and at least a portion of the first seal ring is abutted against the first boss.

According to some embodiments of the utility model, the water outlet assembly further comprises a second seal ring, the seal member comprising a first connection portion and a second connection portion connected to each other, the second connection portion being in sealing connection with an outer surface of the second housing; the first connecting portion is provided with the mounting hole, at least one of the internal surface of first connecting portion and the surface of outlet pipe is provided with the second recess, at least one portion of second sealing washer is located in the second recess, at least one portion of second sealing washer support in first connecting portion, at least one portion of second sealing washer support in the outlet pipe.

According to some embodiments of the utility model, one of the inner surface of the first connecting part and the outer surface of the water outlet pipe is provided with the second groove, the other is provided with a second boss, at least one part of the second boss is located in the second groove, and at least one part of the second sealing ring is abutted against the second boss.

According to some embodiments of the utility model, a portion of the first connecting portion is connected to the second connecting portion, and another portion of the first connecting portion extends in a direction away from the second housing in an axial direction of the mounting hole.

According to some embodiments of the utility model, the water outlet assembly further comprises a pre-tightening piece, a third connecting portion is arranged on the outer surface of the water outlet pipe, the pre-tightening piece is fixedly connected to the third connecting portion, the pre-tightening piece abuts against one side, away from the second shell, of the sealing piece, and the pre-tightening piece is used for limiting movement of the sealing piece in a direction away from the second shell.

According to some embodiments of the utility model, the pretension covers at least a portion of the mounting hole to close a gap between an inner surface of the seal and the outlet pipe.

According to some embodiments of the utility model, the water outlet assembly comprises a third sealing ring, the water outlet pipe comprises a fourth connecting part and a water outlet part which are connected with each other, the water outlet hole is arranged on the water outlet part, and the fourth connecting part is arranged around the water outlet hole in the circumferential direction of the water outlet hole; at least one of the outer surface of the first shell and the fourth connecting portion is provided with a third groove, at least one part of the third sealing ring is located in the third groove, at least one part of the third sealing ring is propped against the fourth connecting portion, and at least one part of the third sealing ring is propped against the first shell.

A fuel cell system according to an embodiment of the present utility model includes a stack and the fuel cell case of any of the above embodiments, the stack being accommodated in the first chamber.

The fuel cell system according to the embodiment of the utility model has at least the following beneficial effects: through the fuel cell box body that uses this application embodiment, can improve fuel cell system's security through the setting of double casing, reduce the hydrogen leakage that the pile produced and leak external possibility to conveniently realize the operation of blowing drainage to the pile.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic diagram of a fuel cell system according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a portion of a fuel cell housing according to an embodiment of the present utility model;

FIG. 3 is a schematic view of the water outlet assembly of FIG. 2;

FIG. 4 is an exploded view of the water outlet assembly of FIG. 3;

FIG. 5 is another schematic view of a portion of a fuel cell housing according to an embodiment of the present utility model;

fig. 6 is a schematic view of a portion of a fuel cell housing according to another embodiment of the present utility model.

Reference numerals:

a fuel cell case 10 and a stack 20;

a first housing 100, a first cavity 110, a first through hole 120;

a second housing 200, a second cavity 210, a second through hole 220;

the water outlet assembly 300, the water outlet pipe 310, the second groove 320, the third connecting part 330, the fourth connecting part 340, the third groove 341, the water outlet part 350, the water outlet hole 351, the sealing piece 360, the first connecting part 370, the second boss 371, the mounting hole 372, the second connecting part 380 and the first groove 381;

pretension 400, first seal ring 410, second seal ring 420, third seal ring 430.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

In the description of the present utility model, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the related art, in the fuel cell box body only provided with the single-layer shell, the purging and draining operation of the electric pile can be rapidly realized by arranging the water outlet pipe on the single-layer shell, and the tightness of the water outlet pipe and the single-layer shell is easy to ensure. In the fuel cell box body of the double-shell, after the corresponding water outlet pipe is connected with the inner shell, the water outlet pipe also needs to pass through the outer shell so as to discharge water outside, and sealing operation is also needed between the water outlet pipe and the outer shell so as to ensure the tightness between the outer shell and outside, so that strict requirements on the positioning accuracy among the inner shell, the outer shell and the water outlet pipe are met, and correspondingly, the processing accuracy of the inner shell, the outer shell and the water outlet pipe is higher, so that the cost is high and the assembly difficulty is high. According to the water outlet pipe and sealing element, the sealing element is used for guaranteeing the tightness between the outer shell and the outside, the sealing structure is simplified, and the requirement for purging and draining operation is effectively reduced on the basis of being provided with double shells.

The fuel cell case 10 and the fuel cell system according to the embodiment of the present application are described below with reference to the drawings.

Referring to fig. 1 and 2, a fuel cell case 10 according to an embodiment of the present utility model includes a first housing 100, a second housing 200, and a water outlet assembly 300, the first housing 100 being provided with a first cavity 110 and a first through hole 120, the first cavity 110 being for accommodating a stack 20, the first through hole 120 communicating with the first cavity 110. The second housing 200 is provided with a second cavity 210 and a second through hole 220, the first housing 100 is accommodated in the second cavity 210, and the second through hole 220 communicates with the second cavity 210. The water outlet assembly 300 includes a water outlet pipe 310 and a sealing member 360, the water outlet pipe 310 is provided with a water outlet hole 351, the water outlet hole 351 is communicated with the first through hole 120, and the water outlet pipe 310 is connected to the outer surface of the first housing 100 in a sealing manner. The sealing member 360 is provided with a mounting hole 372, the mounting hole 372 and the second through hole 220 are coaxially arranged, the water outlet pipe 310 penetrates through the second through hole 220 and the mounting hole 372, the sealing member 360 is connected to the outer surface of the second shell 200 in a sealing manner, and the sealing member 360 is connected to the outer surface of the water outlet pipe 310 in a sealing manner.

The arrangement of the first case 100 and the second case 200 can constitute a double case to improve the safety of the fuel cell. On this basis, the water outlet pipe 310 can guide out the water in the first housing 100 and ensure the sealing of the first chamber 110. The seal 360 can achieve sealing of the second through hole 220 of the second housing 200 and sealing with the water outlet pipe 310 to ensure sealability of the second chamber 210. The cooperation of sealing member 360 and outlet pipe 310 provides the water outlet passage for the operation of blowing and draining, and sealing member 360 and outlet pipe 310's setting has ensured the sealing to first chamber 110 and second chamber 210 respectively to reduce seal structure's positioning accuracy requirement, reduced the requirement that realizes the operation of blowing and draining.

It will be appreciated that if the sealing member 360 is not adopted, the water outlet pipe 310 and the second housing 200 are directly sealed to close the gap between the water outlet pipe 310 and the second housing 200, there is necessarily a high precision requirement on the size of the water outlet pipe 310 and the size of the second through hole 220, and there is a high precision requirement on the positioning between the first through hole 120 of the first housing 100, the water outlet pipe 310 and the second through hole 220 of the second housing 200, so that the cost of the sealing structure set for realizing the operation of the purging water is high, and the requirement for realizing the operation of the purging water is high. The sealing element 360 is arranged, so that the sealing position of the second housing 200 is converted between the sealing element 360 and the second housing 200 and between the sealing element 360 and the drain element, the dimensional accuracy requirement of the second through hole 220 and the water outlet pipe 310 is small, the size of the second through hole 220 can be larger to facilitate assembly, and the accuracy requirement for positioning is lower. The sealing member 360 is a separate component and is located outside the second housing 200, so that the assembly is easy, the preparation is simpler, the sealing structure is effectively simplified, and the requirement for realizing the purging and draining operation is reduced.

Wherein the sealing connection may be achieved by abutment between two components, for example, abutting the seal 360 against the outer surface of the second housing 200 to reduce the chance of gas leakage from the gap between the opposing end surfaces of the seal 360 and the second housing 200. Alternatively, a common sealing member such as a sealant or a sealing ring may be disposed between the two members to achieve a sealing connection, so as to improve the sealing degree, for example, the sealant may be filled between the wall of the second through hole 220 of the sealing member 360 and the water outlet pipe 310 to achieve a sealing connection.

Specifically, referring to fig. 2 to 4, structural fixation between the water outlet pipe 310 and the first housing 100 may be achieved by bonding, welding, or the like, or structural detachable fixation may be achieved by a connecting member such as a bolt. Similarly, the sealing member 360 and the second housing 200 may be fixed structurally by bonding, welding, or the like, or may be detachably fixed structurally by a connecting member such as a bolt. Referring to fig. 2, the first through hole 120, the second through hole 220, the water outlet 351 and the mounting hole 372 extend along the vertical direction, the first through hole 120 and the water outlet 351 are communicated from top to bottom, and the second through hole 220 and the mounting hole 372 are communicated from top to bottom.

It should be noted that, the surface of the first housing 100 on the side where the first cavity 110 is disposed is an inner surface, and the surface on the side facing away from the first cavity 110 is an outer surface. The surface of the second housing 200 on the side where the second cavity 210 is provided is an inner surface, and the surface on the side facing away from the second cavity 210 is an outer surface. The surface of the water outlet pipe 310 on the side where the water outlet hole 351 is arranged is an inner surface, namely the inner surface of the water outlet pipe 310 is the wall of the water outlet hole 351, and the surface of the water outlet pipe 310 on the side away from the water outlet hole 351 is an outer surface. The surface of the side of the sealing member 360 where the mounting hole 372 is provided is an inner surface, that is, the inner surface of the sealing member 360 is the wall of the mounting hole 372, and the surface of the side of the sealing member 360 facing away from the mounting hole 372 is an outer surface.

Referring to fig. 2, 4 and 5, in some embodiments, water outlet assembly 300 further includes a second seal ring 420, and seal 360 includes a first connection 370 and a second connection 380 that are connected to each other, second connection 380 being sealingly connected to an outer surface of second housing 200. The first connection portion 370 is provided with a mounting hole 372, at least one of an inner surface of the first connection portion 370 and an outer surface of the water outlet pipe 310 is provided with a second groove 320, at least a portion of the second sealing ring 420 is located in the second groove 320, at least a portion of the second sealing ring 420 abuts against the first connection portion 370, and at least a portion of the second sealing ring 420 abuts against the water outlet pipe 310. The gap between the first connection portion 370 and the water outlet pipe 310 is fully filled by the elasticity of the second sealing ring 420, so that a sealing effect between the first connection portion 370 and the water outlet pipe 310 can be ensured, wherein the arrangement of the second groove 320 can provide positioning and limiting for the arrangement position of the second sealing ring 420, ensure that the second sealing ring 420 is located at the set position, and reduce the probability that the second sealing ring 420 is separated from the set position. And moreover, the movement path of the gas can be increased, so that the gas can be leaked to the outside after passing through a plurality of abutting surfaces, and the tightness is effectively improved. It will be appreciated that the second sealing ring 420 in fig. 5 is compressed in actual use, and thus fills the second groove 320, so that the second sealing ring 420 is sufficiently abutted against the groove wall of the second groove 320. Specifically, the second groove 320 is an annular groove surrounding the outlet pipe 310.

Further, the inner surface of the first connection portion 370 and the outer surface of the water outlet pipe 310 may be provided with second grooves 320, and the two second grooves 320 are opposite to each other, so as to further ensure the positioning and limiting effects. And further improves the sealing effect.

Referring to fig. 6, as a modification of another aspect of the above-described aspects, at least one of the inner surface of the first connection portion 370 and the outer surface of the water outlet pipe 310 is provided with a second groove 320, the other is provided with a second boss 371, at least a portion of the second boss 371 is located in the second groove 320, and at least a portion of the second seal ring 420 is abutted against the second boss 371. Through the setting of second boss 371, can further compress second sealing washer 420 to improve the effect of holding to second sealing washer 420, ensure sealed effect. It can be appreciated that, in the actual assembly, the second sealing ring 420 will fill the second groove 320 under the abutment of the second boss 371, and a portion thereof extends towards both sides of the first boss, so that the second sealing ring 420 covers a portion of the first boss, thereby effectively improving the sealing effect.

Referring to fig. 2, in some embodiments, a portion of the first connection portion 370 is connected with the second connection portion 380, and another portion of the first connection portion 370 extends in a direction away from the second housing 200 in an axial direction of the mounting hole 372, so that a portion of the first connection portion 370 can protrude from a portion of the second connection portion 380 in a direction away from the second housing 200, so as to provide more structural space for extending the mounting hole 372, so that the mounting hole 372 has a certain length, and the second groove 320 is convenient to provide for sealing connection between the first connection portion 370 and an outer surface of the water outlet pipe 310. And, the convex part of the first connecting part 370 can be convenient for operators to grasp for assembly, so that the assembly difficulty is reduced.

Referring to fig. 2 to 4, in some embodiments, the water outlet assembly 300 further includes a first sealing ring 410, the sealing member 360 includes a first connection portion 370 and a second connection portion 380 connected to each other, the first connection portion 370 is provided with a mounting hole 372, and an outer surface of the water outlet pipe 310 is sealingly connected with an inner surface of the first connection portion 370; the second connection portion 380 is disposed around the mounting hole 372 in the circumferential direction of the mounting hole 372, at least one of the second connection portion 380 and the outer surface of the second housing 200 is provided with a first groove 381, at least a portion of the first seal ring 410 is located in the first groove 381, at least a portion of the first seal ring 410 abuts against the second connection portion 380, and at least a portion of the first seal ring 410 abuts against the second housing 200. The gap between the second connection portion 380 and the second housing 200 is fully filled by the elasticity of the first sealing ring 410, so that a sealing effect between the second connection portion 380 and the second housing 200 can be ensured, wherein the arrangement of the first groove 381 can provide positioning and limiting for the arrangement position of the first sealing ring 410, ensure that the first sealing ring 410 is located at the set position, and reduce the probability that the first sealing ring 410 is separated from the set position. And moreover, the movement path of the gas can be increased, so that the gas can be leaked to the outside after passing through a plurality of abutting surfaces, and the tightness is effectively improved. The structural fit of the first seal ring 410 and the first groove 381 is the same as the structural fit of the second seal ring 420 and the second groove 320, and can be specifically analogized with reference to fig. 5. Specifically, the first groove 381 is an annular groove surrounding the outlet pipe 310.

Further, the second connection portion 380 and the outer surface of the second housing 200 may be provided with first grooves 381, and the two first grooves 381 are opposite to each other, so as to further secure the positioning and limiting effects. And further improves the sealing effect.

Referring to fig. 2 to 4, as a modification of another aspect of the above-described aspects, one of the second connection portion 380 and the outer surface of the second housing 200 is provided with a first groove 381, and the other is provided with a first boss, at least a portion of which is located in the first groove 381, and at least a portion of the first seal ring 410 is abutted against the first boss. Through the arrangement of the first boss, the first sealing ring 410 can be further compressed, so as to improve the propping effect on the first sealing ring 410 and ensure the sealing effect. The structural cooperation of the first sealing ring 410, the first groove 381 and the first boss is the same as the structural cooperation of the second sealing ring 420, the second groove 320 and the second boss 371, and can be specifically analogized with reference to fig. 6.

Referring to fig. 2 to 4, the water outlet assembly 300 includes a third sealing ring 430, the water outlet pipe 310 includes a fourth connection portion 340 and a water outlet portion 350 connected to each other, the water outlet hole 351 is provided at the water outlet portion 350, and the fourth connection portion 340 is provided around the water outlet hole 351 in a circumferential direction of the water outlet hole 351. At least one of the outer surface of the first housing 100 and the fourth connecting portion 340 is provided with a third groove 341, at least a portion of the third sealing ring 430 is located in the third groove 341, at least a portion of the third sealing ring 430 abuts against the fourth connecting portion 340, and at least a portion of the third sealing ring 430 abuts against the first housing 100. The gap between the fourth connection portion 340 and the first housing 100 is fully filled by the elasticity of the third sealing ring 430, so that a sealing effect between the fourth connection portion 340 and the first housing 100 can be ensured, wherein the third groove 341 can provide positioning and limiting for the setting position of the third sealing ring 430, ensure that the third sealing ring 430 is located at the setting position, and reduce the probability that the third sealing ring 430 is separated from the setting position. And moreover, the movement path of the gas can be increased, so that the gas can be leaked to the outside after passing through a plurality of abutting surfaces, and the tightness is effectively improved. The structural cooperation of the third sealing ring 430 and the third groove 341 is the same as the structural cooperation of the second sealing ring 420 and the second groove 320, and can be specifically analogized with reference to fig. 5. Specifically, the third groove 341 is an annular groove surrounding the water outlet 351.

Further, the fourth connection part 340 and the outer surface of the first housing 100 may be provided with third grooves 341, and the two third grooves 341 are opposite to each other, so as to further secure the positioning and limiting effects. And further improves the sealing effect.

Referring to fig. 2 to 4, as a modification of another aspect of the above-described aspects, one of the fourth connection part 340 and the outer surface of the first housing 100 is provided with a third groove 341, the other is provided with a third boss, at least a portion of the third boss is located within the third groove 341, and at least a portion of the third seal ring 430 is abutted against the third boss. Through the setting of third boss, can further compress third sealing washer 430 to improve the effect of holding third sealing washer 430, ensure sealed effect. The structural cooperation of the third sealing ring 430, the third groove 341 and the third boss is the same as the structural cooperation of the second sealing ring 420, the second groove 320 and the second boss 371, and can be specifically analogized with reference to fig. 6.

Referring to fig. 2 to 4, in some embodiments, the water outlet assembly 300 further includes a pre-tightening member 400, the outer surface of the water outlet pipe 310 is provided with a third connection portion 330, the pre-tightening member 400 is fixedly connected to the third connection portion 330, the pre-tightening member 400 abuts against a side of the sealing member 360 facing away from the second housing 200, and the pre-tightening member 400 is used to limit movement of the sealing member 360 in a direction facing away from the second housing 200. The sealing element 360 is fixed through the pre-tightening element 400, the direct connection between the sealing element 360 and the second shell 200 can be changed into the connection between the pre-tightening element 400 and the water outlet pipe 310, the structure of the second shell 200 and the sealing element 360 can be reduced and simplified, the processing is convenient, and the sealing element 360 can be abutted against the second shell 200 by the abutting force provided by the pre-tightening element 400, so that the sealing degree is improved. Specifically, the third connection part 330 and the pretension member 400 may be provided with threads, respectively, so that the pretension member 400 and the third connection part 330 are connected through the threads, and the pretension force is easily adjusted. Or the third connecting portion 330 and the pre-tightening piece 400 may be respectively provided with a clamping groove and a buckle, and are connected through clamping fit, so as to adjust the fixing position and the pre-tightening force of the pre-tightening piece 400.

Further, the pretension 400 covers at least a portion of the mounting hole 372 to close a gap between the inner surface of the seal 360 and the outlet pipe 310. The pretensioner 400 covers a part of the mounting hole 372, thereby assisting in sealing and further improving sealability. For example, in addition to the provision of the second seal ring 420, the installation hole 372 is further sealed by the pretensioner 400, so that the possibility of gas leaking out of the installation hole 372 to the outside can be further reduced.

Referring to fig. 1, a fuel cell system according to an embodiment of the present utility model includes a stack 20 and the fuel cell case 10 of any of the above embodiments, the stack 20 being accommodated in a first chamber 110. Through the application of the fuel cell box 10 of the embodiment of the application, the safety of a fuel cell system can be improved through the arrangement of the double shells, the possibility that hydrogen generated by the electric pile 20 leaks out of the outside is reduced, and the purging and draining operation of the electric pile 20 is conveniently realized.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model. Furthermore, embodiments of the utility model and features of the embodiments may be combined with each other without conflict.

Claims (10)

1. The fuel cell box, its characterized in that includes:

the first shell is provided with a first cavity and a first through hole, the first cavity is used for accommodating the galvanic pile, and the first through hole is communicated with the first cavity;

the second shell is provided with a second cavity and a second through hole, the first shell is accommodated in the second cavity, and the second through hole is communicated with the second cavity;

the water outlet assembly comprises a water outlet pipe and a sealing piece, wherein the water outlet pipe is provided with a water outlet hole, the water outlet hole is communicated with the first through hole, and the water outlet pipe is connected to the outer surface of the first shell in a sealing way; the sealing element is provided with a mounting hole, the mounting hole and the second through hole are coaxially arranged, the water outlet pipe penetrates through the second through hole and the mounting hole, the sealing element is in sealing connection with the outer surface of the second shell, and the sealing element is in sealing connection with the outer surface of the water outlet pipe.

2. The fuel cell box according to claim 1, wherein the water outlet assembly further comprises a first seal ring, the seal member comprises a first connecting portion and a second connecting portion connected to each other, the first connecting portion is provided with the mounting hole, and an outer surface of the water outlet pipe is in sealing connection with an inner surface of the first connecting portion; the second connecting portion is arranged around the mounting hole in the circumferential direction of the mounting hole, at least one of the second connecting portion and the outer surface of the second shell is provided with a first groove, at least one part of the first sealing ring is located in the first groove, at least one part of the first sealing ring is propped against the second connecting portion, and at least one part of the first sealing ring is propped against the second shell.

3. The fuel cell case according to claim 2, wherein one of the second connection portion and the outer surface of the second case is provided with the first groove, the other is provided with a first boss, at least a portion of the first boss is located in the first groove, and at least a portion of the first seal ring abuts against the first boss.

4. A fuel cell housing according to any one of claims 1 to 3, wherein the water outlet assembly further comprises a second seal ring, the seal member comprising first and second connecting portions connected to each other, the second connecting portion being sealingly connected to an outer surface of the second housing; the first connecting portion is provided with the mounting hole, at least one of the internal surface of first connecting portion and the surface of outlet pipe is provided with the second recess, at least one portion of second sealing washer is located in the second recess, at least one portion of second sealing washer support in first connecting portion, at least one portion of second sealing washer support in the outlet pipe.

5. The fuel cell case according to claim 4, wherein one of an inner surface of the first connecting portion and an outer surface of the water outlet pipe is provided with the second groove, the other is provided with a second boss, at least a part of the second boss is located in the second groove, and at least a part of the second seal ring abuts against the second boss.

6. The fuel cell case according to claim 4, wherein a part of the first connecting portion is connected to the second connecting portion, and another part of the first connecting portion extends in a direction away from the second housing in an axial direction of the mounting hole.

7. The fuel cell housing according to claim 1, wherein the water outlet assembly further comprises a pre-tightening member, a third connecting portion is provided on an outer surface of the water outlet pipe, the pre-tightening member is fixedly connected to the third connecting portion, the pre-tightening member abuts against a side of the sealing member facing away from the second housing, and the pre-tightening member is used for limiting movement of the sealing member in a direction facing away from the second housing.

8. The fuel cell case according to claim 7, wherein the pretension member covers at least a portion of the mounting hole to close a gap between an inner surface of the seal member and the water outlet pipe.

9. The fuel cell box according to claim 1, wherein the water outlet assembly comprises a third sealing ring, the water outlet pipe comprises a fourth connecting portion and a water outlet portion which are connected with each other, the water outlet hole is formed in the water outlet portion, and the fourth connecting portion is arranged around the water outlet hole in the circumferential direction of the water outlet hole; at least one of the outer surface of the first shell and the fourth connecting portion is provided with a third groove, at least one part of the third sealing ring is located in the third groove, at least one part of the third sealing ring is propped against the fourth connecting portion, and at least one part of the third sealing ring is propped against the first shell.

10. A fuel cell system comprising a stack and the fuel cell housing of any one of claims 1 to 9, the stack being housed in the first chamber.