Composite stack hydrogen fuel cell and electric equipment

Abstract

The utility model provides a composite stack hydrogen fuel cell and electric equipment, it includes: a first shell and a second shell, the first shell includes a first frame and a support plate, the support plate is provided with a plurality of connection sites, the second shell includes a second frame and a bottom plate; the first bare stack and the second bare stack are arranged in the first shell and the second shell respectively and are connected in series, the first bare stack comprises a first air inlet end plate and a first blind end plate, the first air inlet end plate is connected to the supporting plate, and the first blind end plate is connected to the first frame; the second bare stack comprises a second air inlet end plate and a second blind end plate, the second air inlet end plate is connected to the bottom plate, and the second blind end plate is connected to the second frame. The bare stacks of different sizes can be stably connected, the application range is greatly widened, compatible and reliable connection protection for different bare stacks is achieved, and the bare stacks have the remarkable advantages of being flexible to use, reasonable in structural arrangement, free of customized processing, low in production cost, good in use stability and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a multi-stack hydrogen fuel cell and an electrical equipment using the same. Background Art

[0002] A proton exchange membrane fuel cell stack (PEMFC) is an efficient and clean energy conversion technology, which directly converts the chemical energy of hydrogen and oxygen into electrical energy, providing important technical support for fields such as new energy vehicles and portable power sources. However, with the continuous improvement of the performance requirements for fuel cell stacks, how to improve their power density, stability and economy has become an important research topic.

[0003] Currently, the power output of fuel cell stacks is mainly achieved by increasing the number of stacked sheets of a single stack. However, this method is subject to certain limitations in practical applications. On the one hand, increasing the number of stacked sheets is limited by the manifold area and flow field depth of the bipolar plate, resulting in uneven gas distribution inside the stack and affecting the overall performance of the stack. On the other hand, too many stacked sheets will increase the cost and weight of the stack, which is not conducive to practical applications.

[0004] In view of the above problems, some dual-stack structures have gradually emerged in the prior art. In such structures, two stacks are connected in series and placed inside a housing. However, such a housing needs to be specially manufactured according to the size and shape of the stack. Otherwise, it is difficult to match the stack inside, which may cause problems such as the stack shaking, colliding with the housing or even being unable to be inserted into the housing. Based on this, the additional manufacturing cost of such a special housing and its low utilization rate have become one of the main factors restricting the production and processing of this structure. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the problem of low matching between a conventional dual-stack and a housing in the prior art, and provide a multi-stack hydrogen fuel cell and an electrical equipment using the same.

[0006] To solve the above technical problems, the present utility model provides a hydrogen fuel cell for a double stack, which comprises: a housing assembly, the housing assembly includes at least one first housing and a second housing, the first housing is stacked on the second housing, wherein, the first housing includes a first frame and a support plate, the support plate is connected to at least a part of the first frame and is located at the bottom of the first housing, a plurality of connection sites are provided on the support plate, the second housing includes a second frame and a bottom plate, and a plurality of the second frames are arranged around the edge of the bottom plate; a bare stack assembly, the bare stack assembly includes at least one first bare stack and a second bare stack, the first bare stack and the second bare stack are respectively arranged inside the first housing and the second housing, and the two are connected in series, the first bare stack includes a first stack of plates, a first air inlet end plate and a first blind end plate, the first stack of plates is fixed between the first air inlet end plate and the first blind end plate, wherein, the first air inlet end plate is connected to the support plate, and the first blind end plate is connected to the first frame; the second bare stack includes a second stack of plates, a second air inlet end plate and a second blind end plate, the second stack of plates is fixed between the second air inlet end plate and the second blind end plate, wherein, the second air inlet end plate is connected to the bottom plate, and the second blind end plate is connected to the second frame.

[0007] In an embodiment of the present utility model, the first bare stack includes a first positive electrode and a first negative electrode, the second bare stack includes a second positive electrode and a second negative electrode, the first positive electrode is connected to the second negative electrode, and the first negative electrode is connected to the second positive electrode to connect the first bare stack and the second bare stack in series.

[0008] In an embodiment of the present utility model, the first positive electrode and the second negative electrode are overlapped with each other, and the first negative electrode and the second positive electrode are overlapped with each other.

[0009] In an embodiment of the present utility model, the first positive electrode and the second negative electrode are fixedly connected, and the first negative electrode and the second positive electrode are fixedly connected.

[0010] In an embodiment of the present utility model, the first negative electrode includes a connecting portion and a leading-out portion, the connecting portion and the leading-out portion are electrically connected, wherein, the connecting portion is electrically connected to the second positive electrode, and the leading-out portion penetrates outside the first housing.

[0011] In an embodiment of the present utility model, the housing assembly further includes a top cover, the top cover is connected to the top of the first housing, a pole piece avoidance groove is provided on the top cover, and the pole piece of the first bare stack passes through the pole piece avoidance groove.

[0012] In an embodiment of the present utility model, a first sealing groove is provided on the first housing, and the first sealing groove is arranged on a side of the first housing facing the top cover. A second sealing groove is provided on the second housing, and the second sealing groove is arranged on a side of the second housing facing the first housing. The sealing members are respectively embedded in the first sealing groove and the second sealing groove.

[0013] In an embodiment of the present utility model, the housing assembly further includes a connecting mechanism. The first housing and the second housing are detachably connected through the connecting mechanism. The connecting mechanism includes a plurality of connecting bumps and a plurality of connecting pieces. The plurality of connecting bumps are respectively arranged around the contact portion between the first housing and the second housing. The connecting pieces penetrate through the connecting bumps along the height direction of the battery to connect the first housing and the second housing.

[0014] In an embodiment of the present utility model, at least one process window is further provided on the first housing; at least one communication interface is respectively provided on the first housing and the second housing.

[0015] The present utility model also provides an electrical equipment, which includes the above-mentioned multi-stack hydrogen fuel cell.

[0016] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0017] For the multi-stack hydrogen fuel cell and the electrical equipment of the present utility model, through the split design of the first housing and the second housing in the housing assembly, the first bare stack and the second bare stack are respectively fixedly connected. And based on the structural design of the support plate and the bottom plate, the housing assembly in the present application can stably connect bare stacks of different sizes, greatly improving its application range, realizing compatible and reliable connection protection for different bare stacks. Therefore, compared with the existing conventional stack technology, the present application has significant advantages such as flexible use, reasonable structural arrangement, no need for customized processing, low production cost, and good use stability. Description of the Drawings

[0018] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to the specific embodiments of the present utility model and in combination with the drawings.

[0019] Figure 1 is a three-dimensional structural schematic diagram of the multi-stack hydrogen fuel cell in the preferred embodiment of the present utility model;

[0020] Figure 2 is Figure 1 the exploded structural schematic diagram of the shown multi-stack hydrogen fuel cell;

[0021] Figure 3 isFigure 1 Schematic diagram of the internal structure of the shown multiple-stack hydrogen fuel cell;

[0022] Figure 4 is Figure 1 Schematic diagram of the internal structure of the shown multiple-stack hydrogen fuel cell from another perspective;

[0023] Figure 5 is Figure 1 Schematic three-dimensional structure diagram of the first housing in the shown multiple-stack hydrogen fuel cell;

[0024] Figure 6 is the exploded structure diagram of the multiple-stack hydrogen fuel cell in another embodiment of the present utility model.

[0025] Explanation of the reference numerals in the drawings of the specification: 100, housing assembly; 110, first housing; 111, first frame; 112, support plate; 113, first sealing groove; 114, process window; 115, communication interface; 120, second housing; 121, second frame; 122, second sealing groove; 123, bottom plate; 130, top cover; 131, pole piece avoidance groove; 141, first connecting bump; 142, second connecting bump; 143, connecting piece; 200, bare stack assembly; 210, first bare stack; 211, first stack of sheets; 212, first intake end plate; 213, first blind end plate; 2131, manifold port; 214, first positive electrode; 215, first negative electrode; 2151, connecting portion; 2152, leading-out portion; 220, second bare stack; 221, second stack of sheets; 222, second intake end plate; 223, second blind end plate; 224, second positive electrode; 225, second negative electrode. Detailed implementation manners

[0026] The following further describes the present utility model in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the exemplified embodiments are not intended to limit the present utility model.

[0027] Embodiment 1

[0028] Referring to Figures 1 to 3 as shown, this embodiment provides a multiple-stack hydrogen fuel cell, which includes: a housing assembly 100, the housing assembly 100 includes at least one first housing 110 and a second housing 120, the first housing 110 is stacked on the second housing 120, wherein, the first housing 110 includes a first frame 111 and a support plate 112, the support plate 112 is connected to at least part of the first frame 111 and is located at the bottom of the first housing 110, a plurality of connection sites are provided on the support plate 112, the second housing 120 includes a second frame 121 and a bottom plate 123, and a plurality of the second frames 121 are arranged around the edge of the bottom plate 123;

[0029] The bare stack assembly 200 includes at least one first bare stack 210 and a second bare stack 220. The first bare stack 210 and the second bare stack 220 are respectively disposed inside the first housing 110 and the second housing 120, and are connected in series with each other. The first bare stack 210 includes a first stack of laminations 211, a first intake end plate 212, and a first blind end plate 213. The first stack of laminations 211 is fixed between the first intake end plate 212 and the first blind end plate 213. Among them, the first intake end plate 212 is connected to the support plate 112, and the first blind end plate 213 is connected to the first frame 111. The second bare stack 220 includes a second stack of laminations 221, a second intake end plate 222, and a second blind end plate 223. The second stack of laminations 221 is fixed between the second intake end plate 222 and the second blind end plate 223. Among them, the second intake end plate 222 is connected to the bottom plate 123, and the second blind end plate 223 is connected to the second frame 121. Manifold ports 2131 are provided on both the first blind end plate 213 and the second blind end plate 223.

[0030] In the hydrogen fuel cell of the present embodiment, the first bare stack 210 and the second bare stack 220 are respectively fixedly connected through the split design of the first housing 110 and the second housing 120 in the housing assembly 100. And based on the structural design of the support plate 112 and the bottom plate 123, the housing assembly 100 in the present application can stably connect bare stacks of different sizes, greatly improving its scope of application, and realizing compatible and reliable connection protection for different bare stacks. Thus, compared with the existing conventional stack technology, the present application has significant advantages such as flexible use, reasonable structural arrangement, no need for customized processing, low production cost, and good use stability.

[0031] See Figure 1As shown, the housing assembly 100 in this embodiment is preferably a rectangular box, which includes a first housing 110 and a second housing 120. The first housing 110 is stacked above the second housing 120, and the accommodation spaces inside the two are the same. Further, the housing assembly 100 further includes a top cover 130. The top cover 130 is connected to the top of the first housing 110. A pole piece avoidance groove 131 is provided on the top cover 130, and the pole pieces of the first bare stack 210 pass through the pole piece avoidance groove 131. In other embodiments, two or more first bare stacks 210 can be provided according to actual usage requirements, and the top cover 130 is arranged on the top of the uppermost first housing 110. Further, the top cover 130 in this embodiment is arranged as a flat plate material matching the top surface of the first housing 110. On the one hand, it is used to cover the first housing 110 at the top, and on the other hand, it is used to allow the pole pieces of the bare stack assembly 200 to pass through. Specifically, the pole piece avoidance groove 131 in this embodiment is arranged at the corner of the top cover 130, and it can also be adaptively adjusted according to the actual position and size of the pole pieces. The present utility model does not make specific limitations on this.

[0032] See Figure 4 As shown, two side plates are further provided on the first housing 110 in this embodiment. The two side plates are connected to opposite sides of the first frame 111, and the remaining two sides of the first frame 111 are used for connecting the first air inlet end plate 212 and the first blind end plate 213. Further, at least one process window 114 and at least one communication interface 115 are further provided on the first housing 110 in this embodiment. The process windows 114 in this embodiment are respectively arranged on the two side plates, and the communication interface 115 is connected to the outside of the side plate. In this embodiment, a first sealing groove 113 is provided on the first housing 110. The first sealing groove 113 is arranged on the side of the first housing 110 facing the top cover 130. Specifically, the sealing groove in this embodiment is arranged around the edge of the top of the first frame 111. It can effectively prevent moisture and other liquids from entering the battery interior, thereby avoiding short circuits or other electrical faults, ensuring the safety of the battery in a humid environment or underwater operation, and at the same time helping to balance the pressure inside and outside the battery and preventing the battery from exploding due to excessive internal pressure.

[0033] See Figure 5As shown, correspondingly, the second housing 120 in this embodiment is provided with three side plates, and the remaining side is used to connect the second blind end plate 223 of the second bare stack 220. Further, a second sealing groove 122 is provided on the second housing 120, and the second sealing groove 122 is disposed on the side of the second housing 120 facing the first housing 110. Sealing members are respectively embedded in the first sealing groove 113 and the second sealing groove 122 to achieve a sealed connection between it and the first housing 110. Similarly, a process window 114 and a communication interface 115 are also provided on the side plates of the second housing 120.

[0034] In this embodiment, the housing assembly 100 further includes a connection mechanism. The first housing 110 and the second housing 120 are detachably connected through the connection mechanism. The connection mechanism includes a plurality of connection bumps and a plurality of connecting members 143. The plurality of connection bumps are respectively arranged around the contact portion between the first housing 110 and the second housing 120. The connecting member 143 penetrates through the connection bumps along the height direction of the battery to connect the first housing 110 and the second housing 120. Specifically, the connection bumps in this embodiment include a plurality of first connection bumps 141 and second connection bumps 142. The plurality of first connection bumps 141 are respectively disposed on one side of the first housing 110 and the second housing 120 for connecting the blind end plates of the bare stack assembly 200. The plurality of first connection bumps 141 all protrude horizontally outward from the housing assembly 100, and the plurality of first connection bumps 141 are evenly spaced. When the first housing 110 and the second housing 120 are in contact, the plurality of first connection bumps 141 on the first housing 110 can be arranged in one-to-one correspondence with the plurality of second connection bumps 142 on the second housing 120. The plurality of second connection bumps 142 are respectively arranged around the remaining sides of the first frame 111 and the second frame 121, and protrude outward from the edges of the first frame 111 and the second frame 121 respectively. When the first housing 110 and the second housing 120 are in contact, the second connection bumps 142 in the height direction of the battery can be mutually attached. The connecting member 143 in this embodiment is preferably a bolt. After the first housing 110 and the second housing 120 are stacked on each other, a plurality of bolts can penetrate through the plurality of first connection bumps 141 and the plurality of second connection bumps 142 along the height direction of the battery to realize the connection and fixation between the first housing 110 and the second housing 120. In this embodiment, the number of the plurality of spaced first connection bumps 141 is not less than four, and is used to flexibly adjust the relative positions of the first housing 110 and the second housing 120, thereby improving the connection strength and the fitting degree between the two. The second connection bumps 142 can, on the one hand, realize the connection between the first housing 110 and the second housing 120, and on the other hand, can also improve the sealing degree after the two are connected.

[0035] See Figure 2 andFigure 3 As shown, the first bare stack 210 includes a first positive electrode 214 and a first negative electrode 215, the second bare stack 220 includes a second positive electrode 224 and a second negative electrode 225, the first positive electrode 214 is connected to the second negative electrode 225, and the first negative electrode 215 is connected to the second positive electrode 224 to connect the first bare stack 210 and the second bare stack 220 in series. In this embodiment, the first positive electrode 214 and the second negative electrode 225 are overlapped with each other, and the first negative electrode 215 and the second positive electrode 224 are overlapped with each other. Thus, the series connection between the first bare stack 210 and the second bare stack 220 is realized. In other embodiments, for the convenience of production and processing and to improve the consistency of the bare stack assembly 200, the first positive electrode 214 and the second negative electrode 225 may be set as a fixed connection structure by means of welding or the like, and the first negative electrode 215 and the second positive electrode 224 may also be set as a fixed connection structure by means of welding or the like. Further, in this embodiment, the first positive electrode 214 and the first negative electrode 215 are equivalent to the positive electrode and the negative electrode of the bare stack assembly 200. Therefore, for the convenience of the first positive electrode 214 and the first negative electrode 215 passing through the top cover 130, the structure of the first negative electrode 215 is adjusted in this embodiment, specifically: the first negative electrode 215 includes a connecting portion 2151 and a lead-out portion 2152, and the connecting portion 2151 and the lead-out portion 2152 are electrically connected. Among them, the connecting portion 2151 is electrically connected to the second positive electrode 224, and the lead-out portion 2152 passes through the outside of the first housing 110. Thus, the matching degree between the bare stack assembly 200 and the top cover 130 can be realized through the reasonable layout of the electrode plates.

[0036] Embodiment Two

[0037] See Figure 6 As shown, this embodiment provides another multi-stack hydrogen fuel cell, the main structure and connection method of which are the same as those in Embodiment One, and will not be elaborated here too much. In this embodiment, the first housing 110 and the second housing 120 are set to have the same structure, that is, the support plate 112 of the first housing 110 is equivalent to the bottom plate 123 of the second housing 120, and they have the same frame structure. Thus, the processing efficiency and convenience are further improved.

[0038] Embodiment Three

[0039] This embodiment provides an electrical device, which includes the above-mentioned multi-stack hydrogen fuel cell.

[0040] In summary, for the power-on fuel cell and the electrical equipment of the present utility model, through the split design of the first housing 110 and the second housing 120 in the housing assembly 100, the first bare stack 210 and the second bare stack 220 are respectively fixedly connected. And based on the structural design of the support plate 112 and the bottom plate 123, the housing assembly 100 in this application can stably connect bare stacks of different sizes, greatly improving its scope of application, and realizing compatible and reliable connection protection for different bare stacks. Therefore, compared with the existing conventional stack technology, this application has significant advantages such as flexible use, reasonable structural arrangement, no need for customized processing, low production cost, and good use stability.

[0041] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present utility model.

Claims

1. A composite hydrogen fuel cell, characterized in that: include: A housing assembly, the housing assembly comprising at least one first housing and a second housing, the first housing being stacked on the second housing, wherein the first housing comprises a first frame and a support plate, the support plate being connected to at least a portion of the first frame and located at the bottom of the first housing, the support plate being provided with a plurality of connection sites, the second housing comprising a second frame and a bottom plate, a plurality of the second frames being arranged around the edge of the bottom plate; A bare stack assembly, the bare stack assembly includes at least one first bare stack and a second bare stack, the first bare stack and the second bare stack are respectively arranged inside the first shell and inside the second shell, and the two are arranged in series with each other, the first bare stack includes a first lamination group, a first air intake end plate and a first blind end plate, the first lamination group is fixed between the first air intake end plate and the first blind end plate, wherein the first air intake end plate is connected to the support plate, and the first blind end plate is connected to the first frame; the second bare stack includes a second lamination group, a second air intake end plate and a second blind end plate, the second lamination group is fixed between the second air intake end plate and the second blind end plate, wherein the second air intake end plate is connected to the bottom plate, and the second blind end plate is connected to the second frame.

2. The multi-fuel stack hydrogen fuel cell according to claim 1, characterized in that: The first bare stack includes a first positive electrode and a first negative electrode, the second bare stack includes a second positive electrode and a second negative electrode, the first positive electrode is connected to the second negative electrode, and the first negative electrode is connected to the second positive electrode to connect the first bare stack and the second bare stack in series.

3. The multi-fuel stack hydrogen fuel cell according to claim 2, characterized in that: The first positive electrode and the second negative electrode are overlapped with each other, and the first negative electrode and the second positive electrode are overlapped with each other.

4. The multi-fuel stack hydrogen fuel cell according to claim 2, characterized in that: The first positive electrode is fixedly connected to the second negative electrode, and the first negative electrode is fixedly connected to the second positive electrode.

5. The multi-fuel stack hydrogen fuel cell according to claim 2, characterized in that: The first negative electrode includes a connecting portion and a lead-out portion, the connecting portion and the lead-out portion are electrically connected, wherein the connecting portion is electrically connected to the second positive electrode, and the lead-out portion is disposed outside the first shell.

6. The multi-fuel stack hydrogen fuel cell according to claim 1, characterized in that: The housing assembly further includes a top cover, which is connected to the top of the first shell body. A pole piece avoidance groove is provided on the top cover, and the pole piece of the first bare stack passes through the pole piece avoidance groove.

7. The multi-fuel stack hydrogen fuel cell according to claim 6, characterized in that: A first sealing groove is provided on the first shell, and the first sealing groove is arranged on the side of the first shell facing the top cover. A second sealing groove is provided on the second shell, and the second sealing groove is arranged on the side of the second shell facing the first shell. The sealing members are respectively embedded in the first sealing groove and the second sealing groove.

8. The multi-fuel stack hydrogen fuel cell according to claim 1, characterized in that: The shell assembly also includes a connecting mechanism, and the first shell and the second shell are detachably connected through the connecting mechanism. The connecting mechanism includes a plurality of connecting protrusions and a plurality of connecting members. The plurality of connecting protrusions are respectively arranged around the contact points between the first shell and the second shell. The connecting members penetrate the connecting protrusions along the height direction of the battery to connect the first shell and the second shell.

9. The multi-fuel stack hydrogen fuel cell according to claim 1, characterized in that: The first shell is also provided with at least one process window; the first shell and the second shell are respectively provided with at least one communication interface.

10. An electrical equipment, characterized in that: A hydrogen fuel cell comprising the multiple power stack as described in any one of claims 1 to 9.

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