CN220021184U

CN220021184U - Battery stack

Info

Publication number: CN220021184U
Application number: CN202321402892.9U
Authority: CN
Inventors: 韩令海; 潘兴龙; 刘颖; 盛夏; 赵洪辉; 许德超; 丁磊; 金守一; 汝春宇
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2023-06-05
Filing date: 2023-06-05
Publication date: 2023-11-14
Anticipated expiration: 2033-06-05

Abstract

The utility model belongs to the technical field of fuel cells and discloses a cell stack. The battery stack comprises a shell, a stack component, an adjusting component and a stack support, wherein the stack component is fixedly arranged in the shell, one end of the length direction of the stack component is fixedly connected with the shell, the other end of the length direction of the stack component is fixedly connected with the adjusting component, the adjusting component extends along the length direction of the stack component, one end of the stack support is fixedly connected with the shell, and the other end of the stack support penetrates through the shell and is inserted into the adjusting component. According to the different length direction sizes of the stack components, the stack support of the battery stack can be inserted into different depth positions of the adjusting component, so that the shell can fix the stack components with different length dimensions, and the stack components can be conveniently fixed inside the shell. In addition, the other end of the stack support penetrates through the shell and is plugged in the adjusting component, so that plug connection of the stack support to stack components with different lengths can be completed, and the structure is simple, and the installation is convenient.

Description

Battery stack

Technical Field

The utility model relates to the technical field of fuel cells, in particular to a cell stack.

Background

The proton exchange membrane fuel cell has the advantages of green and high efficiency, and in addition, the heat value of the hydrogen is high, and the source range is wide, so the proton exchange membrane fuel cell is one of the most promising energy sources. The stack is one of the core components of a proton exchange membrane fuel cell. The stack of the stack assembly is formed by stacking and packaging hundreds of membrane electrodes and bipolar plate layers, and because each bipolar plate and each membrane electrode of the stack have production and manufacturing tolerances in the thickness direction, when the stack is packaged by adopting fixed pressure, the tolerance accumulation of the bipolar plates and the membrane electrodes can cause larger deviation in the length direction of the stack, thereby causing inconsistent sizes in the length direction of the stacks of different batches, and increasing the integration difficulty of the stack assembly and the housing.

The prior art can only generally improve the machining precision of the stack, and is difficult to directly solve the problem of difficult integration caused by inconsistent size of the stack in the length direction. There are also the prior art and make the fixed different length dimension's of casing stack subassembly through setting up the regulating part, but have the problem that the regulating part structure is complicated, the installation degree of difficulty is big.

Disclosure of Invention

The utility model aims to provide a battery stack, which can fix stack components with different length and size on a shell, has a simple structure and is convenient to install.

To achieve the purpose, the utility model adopts the following technical scheme:

a cell stack comprising a housing and a stack assembly fixedly mounted within the housing, the cell stack further comprising:

the adjusting component is fixedly connected with one end of the stacking component in the length direction and the shell, the other end of the stacking component in the length direction is fixedly connected with the adjusting component, and the adjusting component extends along the length direction of the stacking component;

the stack support, the one end fixed connection of stack support in the casing, the other end of stack support passes the casing peg graft in the regulation subassembly.

As a preferred scheme of the cell stack, the adjusting component is provided with a penetrating adjusting hole along the extending direction of the adjusting component, and the other end of the stack bracket penetrates through the shell and is inserted into the adjusting hole.

As a preferred embodiment of the battery stack, the adjusting assembly includes:

the linear bearing is fixedly connected to the other end of the length direction of the stack assembly, extends along the length direction of the stack assembly, and the inner ring hole of the linear bearing is the adjusting hole.

As a preferred embodiment of the cell stack, the stack holder includes:

the support shaft penetrates through the shell and is inserted into the adjusting assembly;

the fixed flange is connected with the supporting shaft and fixed on the outer side wall of the shell.

As a preferred scheme of the battery stack, the battery stack further comprises a plurality of first fixing pieces, a plurality of fixing holes are formed in the end face of the fixing flange at intervals along the circumferential direction of the end face of the fixing flange, the first fixing pieces correspond to the fixing holes one by one, and the first fixing pieces are screwed through the corresponding fixing holes to be in threaded connection with the shell.

As the optimal scheme of the cell stack, the fixing holes are all arc holes taking the circle center of the fixing flange as the circle center.

As a preferred scheme of the cell stack, the cell stack further comprises a sealing ring, and the sealing ring is clamped between the shell and the stack bracket.

As a preferred scheme of the battery stack, a groove is formed in one of the shell and the stack support, and the sealing ring is placed in the groove.

As a preferred embodiment of the cell stack, the stack assembly includes:

a first end plate fixed to the housing;

the second end plate is fixedly connected with the adjusting assembly;

and the first end plate and the second end plate are arranged at two opposite ends of the stack in the length direction.

As a preferred aspect of the cell stack, the cell stack further includes a second fixing member configured to fix the first end plate to the case.

The beneficial effects are that:

the utility model provides a battery stack, which is characterized in that one end of the length direction of a stack assembly is fixedly connected with a shell through an adjusting assembly extending along the length direction of the stack assembly, the other end of the stack assembly is fixedly connected with the adjusting assembly, one end of a stack support is fixedly connected with the shell, and the other end of the stack support penetrates through the shell and is spliced in the adjusting assembly, so that the battery stack can adjust the splicing depth position of the stack support in the adjusting assembly according to different length direction sizes of the stack assembly, and the shell can fix the stack assemblies with different length sizes, thereby being convenient for fixing the stack assemblies in the shell. In addition, the other end of the stack support penetrates through the shell and is plugged in the adjusting component, so that plug connection of the stack support and stack components with different lengths can be completed, and the structure is simple, and the installation is convenient.

Drawings

FIG. 1 is a cross-sectional view of a cell stack provided by an embodiment of the present utility model;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a schematic diagram of a stack stand according to an embodiment of the present utility model;

fig. 4 is a right side view of a cell stack provided by an embodiment of the present utility model.

In the figure:

1-a housing;

a 2-stack assembly; 21-a first end plate; 22-a second end plate; 23-stacking;

3-an adjustment assembly; 31-adjusting holes;

4-stacking a support; 41-a support shaft; 42-fixing the flange; 421-fixing holes;

5-a first fixing member;

6-sealing ring.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1, the present embodiment provides a cell stack, which includes a housing 1, a stack assembly 2, an adjusting assembly 3 and a stack bracket 4, wherein the stack assembly 2 is fixed in the housing 1, one end of the length direction of the stack assembly 2 is fixedly connected with the housing 1, the other end is fixedly connected with the adjusting assembly 3, the adjusting assembly 3 extends along the length direction of the stack assembly 2, one end of the stack bracket 4 is fixedly connected with the housing 1, and the other end of the stack bracket 4 is inserted into the adjusting assembly 3 through the housing 1. By arranging the adjusting component 3, the battery stack can adjust the inserting depth position of the stack bracket 4 in the adjusting component 3 according to different length direction sizes of the stack component 2, so that the shell 1 can fix the stack components 2 with different length sizes, and the stack components 2 can be conveniently fixed inside the shell 1. In addition, the other end of the stack support 4 penetrates through the shell 1 and is plugged into the adjusting component 3, so that plug connection of the stack support 4 and the stack components 2 with different lengths can be completed, and the structure is simple, and the installation is convenient.

Further, the stack assembly 2 includes a first end plate 21, a second end plate 22 and a stack 23, where the first end plate 21 and the second end plate 22 are respectively disposed at two opposite ends of the stack 23 in the length direction, and the first end plate 21, the second end plate 22 and the stack 23 are connected and fixed by a connecting piece, so as to ensure the firmness of the stack assembly 2, and in this embodiment, the connecting piece is a screw nut. The first end plate 21 is fixedly connected to the inner wall of the shell 1, and the second end plate 22 is fixedly connected with the adjusting assembly 3. The adjustment assembly 3 may be secured to the second end plate 22 by welding, bolting or screwing. It should be noted that, in other embodiments, the adjusting component 3 and the second end plate 22 may be an integrally formed piece, which is more convenient for processing, and also ensures the connection strength between the adjusting component 3 and the second end plate 22.

Further, the cell stack is provided with a second fixing member (not shown in the drawings) for directly fixing the first end plate 21 of the stack assembly 2 to the inner wall of the housing 1, limiting the degrees of freedom of the first end plate 21 in six directions, and ensuring that the first end plate 21 does not generate relative displacement with the housing 1. The second fixing member may be a machine tooth screw, a self-tapping screw or a bolt. The first end plate 21 and the shell 1 are connected by the second fixing piece in a simple connection mode, and are convenient to detach, install and overhaul.

As shown in fig. 1 and 2, further, the adjustment assembly 3 is provided with an adjustment hole 31 therethrough along the extending direction thereof. The other end of the stack holder 4 is inserted into the adjustment hole 31 through the housing 1. By arranging the adjusting holes 31, the stacking support 4 can be better supported, and the stable plugging of the adjusting component 3 and the stacking support 4 is ensured. In other embodiments, the adjusting hole 31 may be directly formed on the second end plate 22, and the adjusting hole 31 extends along the length direction of the stacking component 2, which is simpler, saves materials, and has lower cost.

In this embodiment, the adjusting component 3 may be configured as a linear bearing, where the linear bearing is fixedly connected to the second end plate 22 of the stacking component 2, and the linear bearing extends along the length direction of the stacking component 2, and an inner ring hole of the linear bearing is an adjusting hole 31. The stack that this embodiment provided can receive the effect of external force at the in-process of using, then stack support 4 will collide or extrude with regulation hole 31, and stack support 4 or regulation hole 31 just damages easily this moment, and linear bearing's internal structure design makes it can bear the load, consequently can effectively alleviate the influence of external force, guarantee the stability of using, thereby avoid because the stress concentration problem that the atress leads to, avoided taking place great collision extrusion between stack support 4 and the regulation hole 31, and then improved the sealing performance and the mechanical life of stack. In other embodiments, the adjusting component 3 may be a sleeve, and the hole of the sleeve is the adjusting hole 31, so that the housing 1 can fix stacks with different length dimensions, and the manufacturing is convenient and the cost is low.

As shown in fig. 2 and 3, the stack holder 4 of the battery stack includes a support shaft 41 and a fixing flange 42, the support shaft 41 is inserted into the adjustment hole 31 through the case 1, the support shaft 41 can be adjusted in the insertion depth position in the adjustment hole 31, the fixing flange 42 is connected with the support shaft 41, and the fixing flange 42 is fixed on the outer side wall of the case 1. By arranging the support shaft 41, the stacking support 4 can be conveniently inserted into the adjusting hole 31, and by arranging the fixing flange 42, the installation area of the stacking support 4 and the shell 1 is increased, and the fixing stability of the stacking support 4 and the shell 1 is ensured.

As shown in fig. 2 to 4, the end surface of the fixing flange 42 is provided with a plurality of fixing holes 421 spaced apart along the circumferential direction thereof, and the cell stack further includes a plurality of first fixing members 5, the plurality of first fixing members 5 are in one-to-one correspondence with the plurality of fixing holes 421, and the first fixing members 5 are screwed through the corresponding fixing holes 421 to be screw-coupled with the case 1. The fixing flange 42 is fixed on the outer side wall of the shell 1 by arranging the plurality of first fixing pieces 5 and the plurality of fixing holes 421 in one-to-one correspondence, and each position of the flange surface of the fixing flange 42 can be fixed, so that the fixing is ensured to be more stable, the stack bracket 4 and the shell 1 are prevented from generating relative displacement, and the service life and the service stability of the cell stack are improved. In the present embodiment, the number of the fixing holes 421 and the first fixing members 5 is 4, and in other embodiments, the number may be other. In the present embodiment, the first fixing member 5 is specifically a bolt, and in other embodiments, the first fixing member 5 may be a screw or the like.

Further, the fixing holes 421 are circular arc holes with the center of the fixing flange 42 as the center. When the fixing flange 42 and the shell 1 are fixed by the first fixing piece 5, the fixing holes 421 are designed into arc holes, so that the alignment of the corresponding holes at each position on the fixing flange 42 and the shell 1 can be ensured, the first fixing piece 5 can be conveniently screwed through the corresponding holes on the arc holes and the shell 1 in sequence, the requirements on the machining accuracy and precision of the holes on the shell 1 are lower due to the shape setting of the arc holes, the machining efficiency is improved, the fixing flange 42 and the shell 1 can be perpendicularly fixed by the first fixing piece 5, the assembly tolerance is improved, and the stress concentration is avoided.

As shown in fig. 2, the cell stack is further provided with a sealing ring 6, and the sealing ring 6 is clamped between the casing 1 and the fixed flange 42 of the stack bracket 4 so as to meet the sealing requirement of the cell stack. The fixing flange 42 of the shell 1 or the stack bracket 4 is provided with a groove, the sealing ring 6 is placed in the groove, the sealing ring 6 is not easy to shift or fall off due to the arrangement of the groove, and the flatness of the contact surface of the fixing flange 42 and the shell 1 can be ensured, so that the sealing performance of the battery stack is better. In this embodiment, the groove is specifically formed on the housing 1, and in other embodiments, the groove may be formed on a flange surface where the fixing flange 42 contacts the housing 1.

It should be noted that two adjusting assemblies 3 are disposed on the second end plate 22 at intervals, correspondingly, two stacking supports 4 are also disposed, and the two stacking supports 4 are disposed in one-to-one correspondence with the two adjusting assemblies 3. Providing two stacking brackets 4 and two adjusting members 3 can ensure that the stacking brackets 4 more firmly support the stacking member 2, so that the stacking member 2 is more firmly mounted inside the housing 1. In other embodiments, the number of the adjusting assemblies 3 and the stack brackets 4 may be other numbers, which are not limited herein.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. Cell stack comprising a housing (1) and a stack assembly (2) fixedly mounted in the housing (1), characterized in that the cell stack further comprises:

the adjusting assembly (3), one end of the stacking assembly (2) in the length direction is fixedly connected with the shell (1), the other end of the stacking assembly (2) in the length direction is fixedly connected with the adjusting assembly (3), and the adjusting assembly (3) extends along the length direction of the stacking assembly (2);

the stack support (4), the one end fixed connection of stack support (4) in casing (1), the other end of stack support (4) pass casing (1) peg graft in adjusting part (3).

2. The cell stack according to claim 1, characterized in that the adjusting assembly (3) is provided with a through adjusting hole (31) along the extending direction thereof, and the other end of the stack bracket (4) is inserted into the adjusting hole (31) through the housing (1).

3. The stack according to claim 2, characterized in that the adjusting assembly (3) comprises:

the linear bearing is fixedly connected to the other end of the length direction of the stack assembly (2), the linear bearing extends along the length direction of the stack assembly (2), and an inner ring hole of the linear bearing is the adjusting hole (31).

4. A stack according to any one of claims 1-3, characterized in that the stack holder (4) comprises:

the support shaft (41) penetrates through the shell (1) and is inserted into the adjusting assembly (3);

-a fixing flange (42), said fixing flange (42) being connected to said support shaft (41), said fixing flange (42) being fixed to the outer lateral wall of said housing (1).

5. The cell stack according to claim 4, further comprising a plurality of first fixing members (5), wherein a plurality of fixing holes (421) are formed in the end face of the fixing flange (42) at intervals along the circumferential direction thereof, the plurality of first fixing members (5) are in one-to-one correspondence with the plurality of fixing holes (421), and the first fixing members (5) are screwed through the corresponding fixing holes (421) to be screwed with the housing (1).

6. The cell stack according to claim 5, wherein the fixing holes (421) are circular arc holes centered around the center of the fixing flange (42).

7. A stack according to any one of claims 1-3, characterized in that the stack further comprises a sealing ring (6), the sealing ring (6) being sandwiched between the housing (1) and the stack holder (4).

8. The cell stack according to claim 7, characterized in that one of the housing (1) and the stack holder (4) is provided with a groove, in which groove the sealing ring (6) is placed.

9. A stack according to any one of claims 1-3, characterized in that the stack assembly (2) comprises:

-a first end plate (21), said first end plate (21) being fixed to said housing (1);

a second end plate (22), wherein the second end plate (22) is fixedly connected with the adjusting component (3);

and a stack (23), wherein the first end plate (21) and the second end plate (22) are respectively arranged at two opposite ends of the stack (23) in the length direction.

10. The cell stack according to claim 9, further comprising a second fixing member configured to fix the first end plate (21) to the housing (1).