CN210723241U

CN210723241U - Fuel cell system and vehicle

Info

Publication number: CN210723241U
Application number: CN201922055479.XU
Authority: CN
Inventors: 段羽; 赵朕宇; 牛振华; 崔天宇
Original assignee: Weishi Energy Technology Co Ltd
Current assignee: Weishi Energy Technology Co Ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-06-09
Anticipated expiration: 2029-11-25

Abstract

The utility model discloses a fuel cell system and vehicle. The fuel cell system includes: a stack having a stack buss; a distribution box having a distribution box bus bar, the stack bus bar being connected with the distribution box bus bar by a first fastener. According to the utility model discloses a fuel cell system, the galvanic pile busbar is connected through first fastener with the block terminal busbar to realize the galvanic pile and the electricity of block terminal and be connected, greatly reduced between galvanic pile and the block terminal electric connection structure's weight and occupation space, be favorable to satisfying the vehicle to the requirement that the structure is compact and light and handy, reduced automobile body weight and cost, and can bear jolting and vibration of whole car.

Description

Fuel cell system and vehicle

Technical Field

The utility model relates to an automotive filed particularly, relates to a fuel cell system and vehicle.

Background

In a fuel cell system, hydrogen from the anode of the stack reacts with oxygen from the cathode to produce electricity. The distribution box functions to distribute the electrical energy generated by the stack to the load.

In the related art, the stack and the distribution box are connected by a wire harness capable of conducting high voltage and high current, but since the current is high, the required wire harness has a large cross-sectional area, resulting in a large bending radius, a long stroke, high voltage loss and heavy weight. Therefore, the high-voltage wire harness occupies a large amount of space, increases the weight and cost of the vehicle body, and cannot meet the requirements of compact structure and lightness of the whole vehicle.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a fuel cell system to reduce the occupied space and weight of an electrical connection structure between a stack and a distribution box.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a fuel cell system comprising: a stack having a stack buss; a distribution box having a distribution box bus bar, the stack bus bar being connected with the distribution box bus bar by a first fastener.

According to some embodiments of the utility model, the galvanic pile busbar with the block terminal busbar is the copper bar that has the connecting hole, first fastener is worn to locate the connecting hole.

According to some embodiments of the invention, the first fastener comprises a bolt and a nut, the nut being welded to one of the stack busbar and the distribution box busbar.

According to some embodiments of the invention, the distribution box and one of the galvanic piles further have an outer extension portion adapted to be connected with the distribution box and the other of the galvanic piles by a second fastener, the galvanic pile busbar, the distribution box busbar and the first fastener being located in a space enclosed by the outer extension portion.

Further, the fuel cell system further includes: a first seal for sealing a gap between the other of the distribution box and the stack and the outer extension.

Further, the extension portion is integrally formed on a casing of the distribution box, and at least one of the casing and the extension portion of the electric pile is provided with a first sealing groove for accommodating the first sealing element; or, the extension portion is integrally formed on a shell of the electric pile, and at least one of the shell of the distribution box and the extension portion is provided with a first sealing groove for accommodating the first sealing element.

According to some embodiments of the present invention, the side wall of the extension portion is provided with an operation port, and the fuel cell system further includes a cover plate that is openable and closable of the operation port.

Further, the fuel cell system further includes: and the second sealing element is used for sealing a gap between the cover plate and the edge of the operation opening, and at least one of the cover plate and the edge of the operation opening is provided with a second sealing groove for accommodating the second sealing element.

According to some embodiments of the present invention, the cell stack busbar includes positive cell stack busbar and negative cell stack busbar, the block terminal busbar including be used for with the positive block terminal busbar that positive cell stack busbar electricity is connected and with the negative block terminal busbar that negative cell stack busbar electricity is connected, the extension encircles the positive cell stack busbar the negative cell stack busbar the positive block terminal busbar with the negative block terminal busbar sets up.

Compared with the prior art, the fuel cell system of the utility model has the following advantages:

the galvanic pile busbar is connected with the distribution box busbar through the first fastener to realize the galvanic pile and the electricity of distribution box and be connected, greatly reduced between galvanic pile and the distribution box electric connection structure's weight and occupation space, be favorable to satisfying the vehicle to compact structure and the requirement of lightness, reduced automobile body weight and cost, and electric connection structure can bear jolting and vibration of whole car, has improved the security performance, has reduced the pressure loss.

Another object of the present invention is to provide a vehicle including the fuel cell system of the above embodiment.

Compared with the prior art, the vehicle provided by the utility model has the same advantages as the fuel cell system has, and the description is omitted.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

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

fig. 2 is a schematic diagram of a distribution box of a fuel cell system according to an embodiment of the present invention;

fig. 3 is a schematic view of an angle of a stack of a fuel cell system according to an embodiment of the present invention;

fig. 4 is a schematic diagram of another angle of the stack of the fuel cell system according to the embodiment of the present invention.

Description of reference numerals:

a fuel cell system 100;

a stack 10; a stack bus bar 11; a positive electrode stack bus bar 111; a negative stack bus 112; a housing 12 of the stack 10; a first seal groove 121;

a distribution box 20; a distribution box bus bar 21; a positive distribution box bus bar 211; a negative distribution box bus bar 212; an extension portion 22; an operation port 221; a second seal groove 222; a housing 23 of the distribution box 20;

a first fastener 30; a nut 31;

a connection hole 40; and a mounting hole 41.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail with reference to fig. 1 to 4 in conjunction with the embodiments.

Referring to fig. 1, a fuel cell system 100 according to an embodiment of the present invention includes: a stack 10 and a distribution box 20.

Specifically, as shown in fig. 1 to 4, the stack 10 has a stack bus bar 11, the distribution box 20 has a distribution box bus bar 21, and the stack bus bar 11 and the distribution box bus bar 21 are connected by a first fastener 30. Thereby, the electrical connection of the stack 10 and the distribution box 20 is achieved, so that electricity generated by the operation of the stack 10 can be distributed to a load through the distribution box 20.

Compared with the prior art in the pile and the block terminal carry out the electricity through high-voltage wire harness and connect, the utility model discloses in cancelled high-voltage wire harness structure, and the electric connection mode who adopts the busbar to connect has reduced electric connection structure's occupation space and weight to a great extent, has successfully solved the big technical problem of traditional pencil occupation space, can satisfy the vehicle to the requirement of compact structure, lightness and handiness to manufacturing cost has been reduced, car sound weight and vehicle use cost have been reduced.

In addition, compared with the traditional wiring harness connection mode, the mode that the bus bars are connected by the first fasteners 30 is firmer and more reliable, the jolt and vibration of the whole vehicle can be borne, and the vibration resistance of the fuel cell system 100 is greatly improved. The utility model discloses an electric connection structure still very big degree shortened the electric stroke that crosses, reduces the pressure loss, has improved electricity transmission efficiency.

According to the utility model discloses fuel cell system 100, galvanic pile busbar 11 is connected through first fastener 30 with block terminal busbar 21 to realize galvanic pile 10 and block terminal 20's electricity and be connected, greatly reduced between galvanic pile 10 and the block terminal 20 electric connection structure's weight and occupation space, be favorable to satisfying the vehicle to the requirement that the structure is compact and light and handy, automobile body weight and cost have been reduced, and electric connection structure can bear jolting and vibration of whole car, the security performance is improved, the pressure loss is reduced.

According to some embodiments of the present disclosure, as shown in fig. 3 and 4, the stack bus bar 11 includes a positive stack bus bar 111 and a negative stack bus bar 112, and as shown in fig. 2, the distribution box bus bar 21 includes a positive distribution box bus bar 211 and a negative distribution box bus bar 212. The positive electrode stack bus bar 111 and the positive electrode distribution box bus bar 211 are connected by at least one first fastener 30, and the negative electrode stack bus bar 112 and the negative electrode distribution box bus bar 212 are connected by at least one first fastener 30.

According to the utility model discloses a some embodiments, as shown in fig. 2 and fig. 3, galvanic pile busbar 11 and block terminal busbar 21 are the copper bar, and the copper bar has connecting hole 40, and first fastener 30 wears to locate the connecting hole 40 of two copper bars to connect two copper bars, the connected mode is simple and firm reliable, and two copper bars can the face-to-face contact in order to improve electricity transmission efficiency.

In some embodiments, the connecting holes 40 of the two copper bars may be threaded holes, the first fastening member 30 has external threads, and the external threads of the first fastening member 30 can be matched with the internal threads of the threaded holes to realize connection.

In other embodiments, as shown in fig. 3 and 4, the first fastening member 30 includes a bolt and a nut 31, wherein the bolt is inserted into the connecting hole 40 and is in threaded connection with the nut 31, the two copper bars are clamped between the nut 31 and the nut of the bolt, and no thread is required to be arranged in the connecting hole 40, which not only simplifies the structure of the copper bars, but also is beneficial to improving the connection area of the threaded connection, so as to improve the reliability.

In addition, as shown in fig. 3 and 4, the nut 31 is welded to one of the stack bus bar 11 and the distribution box bus bar 21, so that the nut 31 is not easily rotated or dislocated when the bolt is installed, the nut 31 is easily aligned with the connection hole 40, and an operation space required for connecting the bolt and the nut 31 is smaller, which is advantageous for further improving the structural compactness of the stack 10 and the distribution box 20.

According to some embodiments of the present invention, as shown in fig. 1 and 2, the distribution box 20 further has an outer extension portion 22, and the outer extension portion 22 can be connected to the stack 10 through a second fastener, for example, connected to the casing 12 of the stack 10 through the second fastener, so as to improve the reliability of the connection between the stack 10 and the distribution box 20, and further improve the stability of the electrical connection between the stack bus bar 11 and the distribution box bus bar 21.

For example, in the example shown in fig. 2 to 4, the opening edge of the outer extension portion 22 and the housing 12 of the stack 10 are respectively provided with eight mounting holes 41, and the second fastener can be inserted into the mounting holes 41 of the outer extension portion 22 and the mounting holes 41 of the housing 12 of the stack 10 to connect the distribution box 20 and the stack 10. Of course, the number of mounting holes 41, including but not limited to the eight shown in fig. 2-4, need only be sufficient to reliably connect the distribution box 20 and the stack 10.

In addition, as shown in fig. 1 and fig. 2, the stack bus bar 11, the distribution box bus bar 21 and the first fastening member 30 are located in a space surrounded by the extension portion 22, and the extension portion 22 can shield the electrical connection structure, so that on one hand, the electrical connection structure is protected from being damaged by collision, and the electrical connection structure is prevented from being polluted by impurities such as external liquid and dust to influence the reliability of electrical connection, and on the other hand, an electrified component can be shielded, so that an electric shock accident of a person is prevented, and the safety performance is improved.

In the embodiment where the stack bus bar 11 includes the positive stack bus bar 111 and the negative stack bus bar 112, and the distribution box bus bar 21 includes the positive distribution box bus bar 211 and the negative distribution box bus bar 212, as shown in fig. 2, the extension portion 22 is disposed around the positive stack bus bar 111, the negative stack bus bar 112, the positive distribution box bus bar 211, and the negative distribution box bus bar 212, that is, the positive electrical connection structure and the negative electrical connection structure are both located in a space surrounded by the same extension portion 22, which is beneficial to simplifying the structure of the fuel cell system 100.

According to other embodiments of the present invention, the stack 10 may have an outer extension portion 22, and the outer extension portion 22 may be connected to the distribution box 20 by a second fastening member, which is also within the scope of the present invention. From the above description, the technical solution of the stack 10 having the extension portion 22 is understood by those skilled in the art, and will not be described herein. In other words, one of the distribution box 20 and the stack 10 also has an outer extension 22, and the outer extension 22 can be connected to the other of the distribution box 20 and the stack 10 by a second fastener.

In some embodiments of the present invention, the fuel cell system 100 further includes a first sealing member, the first sealing member is used to seal a gap between the other one of the distribution box 20 and the stack 10 and the extension portion 22, so as to improve the sealing performance of the connection, prevent external impurities from entering the space surrounded by the extension portion 22 through the gap and affecting the electrical connection, and meet the requirements of dustproof and waterproof grade.

In some embodiments, as shown in fig. 1 and 2, the outer extension 22 is integrally formed on the casing 23 of the distribution box 20, and at least one of the casing 12 and the outer extension 22 of the stack 10 is provided with a first sealing groove 121, and the first sealing groove 121 is used for accommodating a first sealing element so as to limit the position of the first sealing element and prevent the first sealing element from being misaligned to affect the sealing effect. Meanwhile, the extension portion 22 and the shell 23 of the distribution box 20 can be integrally processed and formed, so that the processing procedure is simplified, the production efficiency is improved, and the connection gap is reduced.

In other embodiments, the outer extension 22 is integrally formed on the casing 12 of the stack 10, and at least one of the casing 23 and the outer extension 22 of the distribution box 20 is provided with a first sealing groove 121, and the first sealing groove 121 is used for accommodating a first sealing element so as to limit the position of the first sealing element and prevent the first sealing element from being misaligned to affect the sealing effect. Meanwhile, the outer extension part 22 can be integrally formed with the shell 12 of the stack 10, so that the processing procedure is simplified, the production efficiency is improved, and the connection clearance is reduced.

According to some embodiments of the present invention, as shown in fig. 1 and fig. 2, the sidewall of the extension portion 22 is provided with an operation opening 221, so that the worker can realize operations such as disassembling and assembling the stack bus bar 11 and the distribution box bus bar 21 through the operation opening 221, and the manner of opening the operation opening 221 is also beneficial to heat dissipation during the operation of the fuel cell system 100.

During assembly, the other of the distribution box 20 and the stack 10 may be connected to the extension portion 22 by a second fastening member, so that the stack bus bar 11 and the distribution box bus bar 21 are aligned with the connection hole 40, and then the stack bus bar 11 and the distribution box bus bar 21 are connected by the operation hole 221 through the first fastening member 30.

The fuel cell system 100 further includes a cover that opens and closes the operation opening 221, and the cover is operable to open the operation opening 221 and close the operation opening 221 after the operation is completed, so as to prevent foreign matters from entering the region surrounded by the extension portion 22 through the operation opening 221.

In the embodiment where the stack bus bar 11 includes the positive stack bus bar 111 and the negative stack bus bar 112, and the distribution box bus bar 21 includes the positive distribution box bus bar 211 and the negative distribution box bus bar 212, as shown in fig. 1 and 2, the two operation ports 221 may be two, and the two operation ports 221 are respectively opposite to the positive electrical connection structure and the negative electrical connection structure, so as to reduce the opening area on the extension portion 22 and ensure the convenience of operation of the two electrical connection structures.

In some embodiments, the fuel cell system 100 may further include a second sealing member for sealing a gap between the cover plate and the edge of the operation opening 221, so as to further improve the sealing effect of the cover plate closing the operation opening 221 and meet the waterproof and dustproof grade requirement.

In addition, as shown in fig. 1 and 2, at least one of the cover plate and the edge of the operation opening 221 may be provided with a second sealing groove 222, and the second sealing groove 222 is used to accommodate a second sealing element, so as to limit the second sealing element and prevent the second sealing element from being dislocated to affect the sealing effect.

According to another aspect of the present invention, a vehicle includes the fuel cell system 100 of the above embodiment.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel cell system (100), comprising:

a stack (10), the stack (10) having a stack busbar (11);

a distribution box (20), wherein the distribution box (20) is provided with a distribution box bus bar (21), and the electric pile bus bar (11) is connected with the distribution box bus bar (21) through a first fastening piece (30).

2. The fuel cell system (100) according to claim 1, wherein the stack bus bar (11) and the distribution box bus bar (21) are each a copper bar having a connection hole (40), and the first fastener (30) is inserted through the connection hole (40).

3. The fuel cell system (100) of claim 1, wherein the first fastener (30) comprises a bolt and a nut (31), the nut (31) being welded to one of the stack bus bar (11) and the distribution box bus bar (21).

4. The fuel cell system (100) of claim 1, wherein one of the distribution box (20) and the stack (10) further has an extension (22), the extension (22) being adapted to be connected to the other of the distribution box (20) and the stack (10) by a second fastener, the stack busbar (11), the distribution box busbar (21), and the first fastener (30) being located within a space enclosed by the extension (22).

5. The fuel cell system (100) according to claim 4, further comprising:

a first seal for sealing a gap between the other of the distribution box (20) and the stack (10) and the outer extension (22).

6. The fuel cell system (100) of claim 5, wherein the outer extension (22) is integrally formed to a housing (23) of the distribution box (20), at least one of the housing (12) and the outer extension (22) of the stack (10) being provided with a first sealing groove (121) for accommodating the first seal; alternatively, the first and second electrodes may be,

the outer extension part (22) is integrally formed on a shell (12) of the galvanic pile (10), and at least one of the shell (23) of the power distribution box (20) and the outer extension part (22) is provided with a first sealing groove (121) for accommodating the first sealing element.

7. The fuel cell system (100) according to claim 4, wherein a side wall of the extension portion (22) is provided with an operation port (221), and the fuel cell system (100) further includes a cover plate that can open and close the operation port (221).

8. The fuel cell system (100) according to claim 7, further comprising:

a second sealing member for sealing a gap between the cover plate and a rim of the operation opening (221), at least one of the cover plate and the rim of the operation opening (221) being provided with a second sealing groove (222) for accommodating the second sealing member.

9. The fuel cell system (100) of claim 4, wherein the stack bus bar (11) comprises a positive stack bus bar (111) and a negative stack bus bar (112), the distribution box bus bar (21) comprises a positive distribution box bus bar (211) for electrical connection with the positive stack bus bar (111) and a negative distribution box bus bar (212) for electrical connection with the negative stack bus bar (112), and the outer extension (22) is disposed around the positive stack bus bar (111), the negative stack bus bar (112), the positive distribution box bus bar (211), and the negative distribution box bus bar (212).

10. A vehicle, characterized by comprising a fuel cell system (100) according to any one of claims 1-9.