CN220324493U

CN220324493U - Electric pile packaging box body and fuel cell

Info

Publication number: CN220324493U
Application number: CN202321764837.4U
Authority: CN
Inventors: 何海楠; 王英; 刘冬安; 朱梦佳; 刘威
Original assignee: China Automotive Innovation Co Ltd
Current assignee: China Automotive Innovation Co Ltd
Priority date: 2023-07-06
Filing date: 2023-07-06
Publication date: 2024-01-09
Anticipated expiration: 2033-07-06

Abstract

The utility model relates to the technical field of fuel cells, and discloses a galvanic pile packaging box body and a fuel cell, wherein a phase-change medium is filled in a phase-change cavity, heat generated during the operation of the fuel cell can be conducted to the phase-change medium through a heat conducting inner plate, and the heat is absorbed by the phase-change medium; meanwhile, the heat-insulating resin layer has a heat-insulating function, realizes heat absorption and energy storage by using the phase-change medium and the heat-insulating resin layer, and can prolong the time consumed by cooling the fuel cell when the external temperature is lower, thereby being beneficial to cold starting of the fuel cell. The heat preservation resin layer still has concurrently and supports the effect to the phase change medium, adopts the support planking to provide the support for the heat preservation resin layer simultaneously, avoids the heat preservation resin layer to take place to fracture because of external striking supports the planking to reach the effect of guaranteeing the structural strength of encapsulation box, reduce the influence that sets up the phase change cavity and cause the encapsulation box structural strength, guarantee the anticollision performance of encapsulation box. The density of the resin is relatively small, which is beneficial to the lightweight design of the fuel cell.

Description

Electric pile packaging box body and fuel cell

Technical Field

The utility model relates to the technical field of fuel cells, in particular to a galvanic pile packaging box body and a fuel cell.

Background

The packaging box body is one of important parts of the fuel cell pile, is a carrier of a pile core and provides support for each part of the pile; meanwhile, the packaging box body also needs to bear the vibration and impact of the whole stack, has the characteristics of salt spray resistance, IP67 resistance, high insulation and the like, and has high requirements on a packaging structure.

At present, the materials of the packaging box body are mainly aluminum alloy 6061, the specific structural forms of the packaging box body are three, firstly, all side plates of the packaging box body are separately processed, and then a plurality of side plates are fixedly connected through structural adhesive or fasteners to form the packaging box body, but the packaging box body does not bear the compaction force of a galvanic pile, and the requirement of air tightness cannot be met. And secondly, the packaging box body is formed by machining an aluminum ingot in a numerical control machining center. And thirdly, die-casting technology is adopted for die-opening integrated molding.

As an important component of the vehicle-mounted system, the lightweight design is important to consider. On the one hand, all side plates of the prior packaging box bodies are of pure aluminum plate structures, so that the weight is large, and the weight requirement on the fuel cell is difficult to meet. On the other hand, the current packaging box is usually considered as a single structural member, cannot be comprehensively designed by considering the performance and the operation characteristics of the electric pile, and does not contribute to the performance requirements of the electric pile operation such as cold start, temperature uniformity and the like.

For this reason, the prior art proposes to design the curb plate of encapsulation box into hollow structure, packs phase change material in the cavity inner chamber of curb plate, keeps warm through phase change medium material to add metal particle in the paraffin, strengthen phase change material's heat conductivity, do not set up adiabatic apparatus, lead to the heat loss that the pile work produced.

In addition, the side plates directly adopt a hollow structure, so that the structural strength of the packaging box body can be reduced, and the packaging box body is easy to deform when in collision, so that a galvanic pile is damaged.

Disclosure of Invention

The utility model aims to provide a galvanic pile packaging box body and a fuel cell, which not only can meet the light-weight requirement of a galvanic pile, but also can meet the requirements on the performance and operation of the galvanic pile at the same time, and ensure the structural strength of the packaging box body.

In order to achieve the purpose, on one hand, the utility model adopts the following technical scheme:

the galvanic pile packaging box body comprises a packaging main body, wherein the packaging main body is provided with a plurality of packaging plates, each packaging plate comprises a heat insulation resin layer, a heat conduction inner plate and a support outer plate, the heat conduction inner plate is arranged on the inner side of the heat insulation resin layer in a laminated mode, and the support outer plate is arranged on the outer side of the heat insulation resin layer in a laminated mode;

the heat preservation resin layer, the heat conduction inner plate and the support outer plate are surrounded to form a phase change cavity, and a phase change medium is filled in the phase change cavity.

As a preferable technical scheme of the above galvanic pile packaging box, the thermal insulation resin layer is provided with a phase change groove, the phase change groove is provided with at least a first opening facing the heat conduction inner plate, and the first opening is blocked by the heat conduction inner plate.

As a preferable technical scheme of the galvanic pile packaging box, the phase change groove is arranged in a penetrating manner along the thickness direction of the heat insulation resin layer, the opening at one end of the phase change groove forms the first opening, the opening at the other end forms the second opening, and the second opening is blocked by the support outer plate.

As a preferred technical scheme of the galvanic pile packaging box, the supporting outer plate comprises an outer plate body and a plugging plate fixed on the outer plate body, wherein a filling channel which is arranged in a penetrating manner along the thickness direction of the outer plate body and is opposite to the second opening is formed in the outer plate body, and the plugging plate is inserted into the filling channel in a sealing manner from one end of the filling channel, which is opposite to the heat conducting inner plate.

As a preferable technical scheme of the galvanic pile packaging box body, the vacuum degree in the phase change cavity is 70% -80%.

As a preferable technical scheme of the galvanic pile packaging box, opposite side surfaces of the heat insulation resin layer are respectively stuck and fixed on the heat conduction inner plate and the support outer plate;

and/or a plurality of packaging plates enclose a box structure with one end open, and two adjacent packaging plates are welded and fixed.

As a preferable technical scheme of the galvanic pile packaging box, the side walls of the packaging plate extending along the thickness direction of the packaging plate are respectively coated with a sealing side plate, and two opposite ends of the sealing side plate are respectively fixed on the heat conduction inner plate and the support outer plate.

As a preferable technical scheme of the galvanic pile packaging box body, the heat-insulating resin layer is of a glass fiber resin structure; and/or, the heat conduction inner plate and the support outer plate are aluminum plates.

As a preferable technical scheme of the galvanic pile packaging box, an insulating layer is arranged on the wall surface of the heat conduction inner plate, which is opposite to the heat insulation resin layer, and an insulating layer is arranged on the wall surface of the support outer plate, which is opposite to the heat insulation resin layer.

In order to achieve the above object, in another aspect, the present utility model further provides a fuel cell, including a stack, and a stack packaging box according to any one of the above aspects, the stack being packaged in the stack packaging box.

The utility model has the beneficial effects that: according to the pile packaging box and the fuel cell, the heat conduction inner plate, the heat insulation resin layer and the support outer plate are arranged in a stacked mode to form the phase change cavity, the phase change cavity is filled with the phase change medium, and heat generated during operation of the fuel cell can be conducted to the phase change medium through the heat conduction inner plate and is absorbed by the phase change medium; meanwhile, the heat-insulating resin layer also has a heat-insulating function, realizes heat absorption and energy storage by using the phase-change medium and the heat-insulating resin layer, and can prolong the time consumed by cooling the fuel cell when the external temperature is lower, thereby being beneficial to cold starting of the fuel cell and reducing the damage to the fuel cell caused by low temperature and cold starting.

The heat preservation resin layer still has concurrently and supports the effect to the phase change medium to adopt simultaneously to support the planking and provide for the heat preservation resin layer and support the planking because of external impact and take place to fracture, thereby reach the effect of guaranteeing the structural strength of encapsulation box, reduce and set up the influence that the phase change cavity caused to encapsulation box structural strength, guarantee the anticollision performance of encapsulation box.

In addition, the density of the resin is smaller than that of the conventional metal for preparing the packaging box body, so that the packaging box body can be subjected to weight reduction to a certain extent, and the lightweight design of the fuel cell is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural view of a stack package case (package top plate not shown) provided in the present embodiment;

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is a sectional view of the stack package case provided in the present embodiment;

fig. 4 is an exploded view of the package substrate provided by the present embodiment;

fig. 5 is a schematic structural view of a package body provided in the present embodiment;

fig. 6 is an enlarged schematic view at a in fig. 5.

In the figure:

1. a package body; 11. packaging the bottom plate; 12. packaging side plates; 13. packaging the backboard;

2. packaging end plates;

3. a galvanic pile;

100. a heat conductive inner plate; 200. a heat-insulating resin layer; 201. a phase change tank; 300. supporting an outer plate; 301. an outer plate body; 3011. filling the channel; 302. a plugging plate; 400. sealing the side plates; 500. a phase change chamber.

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.

As shown in fig. 1 to 6, the present embodiment provides a galvanic pile packaging box, comprising a packaging body 1, the packaging body 1 having a plurality of packaging boards, the packaging boards comprising a heat insulating resin layer 200, a heat conductive inner plate 100 laminated inside the heat insulating resin layer 200, and a support outer plate 300 laminated outside the heat insulating resin layer 200; the thermal insulation resin layer 200, the heat conduction inner plate 100 and the support outer plate 300 enclose a phase change cavity 500, and the phase change cavity 500 is filled with a phase change medium.

In the stack packaging box provided by the embodiment, the heat conduction inner plate 100, the heat insulation resin layer 200 and the support outer plate 300 are stacked to form the phase change chamber 500, and the phase change chamber 500 is filled with the phase change medium, so that heat generated during the operation of the fuel cell can be conducted to the phase change medium through the heat conduction inner plate 100, and the phase change medium is utilized to absorb the heat; meanwhile, the heat-insulating resin layer 200 also has a heat-insulating function, realizes heat absorption and energy storage by using the phase-change medium and the heat-insulating resin layer 200, is beneficial to ensuring the thermal uniformity of the whole fuel cell and is beneficial to the operation of the electric pile 3 in a wider temperature interval; when the external temperature is lower, the time consumed by cooling after the fuel cell is stopped can be prolonged, the cold start performance of the fuel cell is improved, and the damage to the fuel cell caused by low temperature and cold start is reduced.

The heat preservation resin layer 200 still has concurrently and supports the effect to the phase change medium to adopt simultaneously to support planking 300 and provide the support for heat preservation resin layer 200, avoid heat preservation resin layer 200 to take place to fracture because of external impact supports planking 300, thereby reach the effect of guaranteeing the structural strength of encapsulation box, reduce the influence that sets up phase change cavity 500 to the structural strength of encapsulation box and cause, guarantee the anticollision performance of encapsulation box.

Alternatively, the phase change medium comprises a paraffin or aromatic solid-liquid organic phase change material, and paraffin is used as the phase change medium, for example.

Alternatively, the insulating resin layer 200 adopts a fiberglass resin structure. The insulating resin layer 200 may be made of other resin materials having both insulating and supporting properties.

Alternatively, the heat conductive inner plate 100 and the support outer plate 300 are both made of aluminum plates, so that the cost is low, the weight is light, the structural strength is good, and the heat conductive performance is good. It should be noted that, the heat conductive inner plate 100 may be made of other high heat conductive metal materials, and the support outer plate 300 may be made of other metal materials with good structural strength.

Alternatively, as shown in fig. 3, 4 and 6, the heat insulating resin layer 200 is provided with a phase change groove 201, and the phase change groove 201 has at least a first opening facing the heat conductive inner plate 100, the first opening being blocked by the heat conductive inner plate 100. By providing the first opening, the heat generated by the operation of the electric pile 3 is facilitated to be transferred into the phase-change cavity 500 through the heat conducting inner plate 100 and the first opening and absorbed by the phase-change medium.

Alternatively, as shown in fig. 3 and 4, the phase change groove 201 is provided through in the thickness direction of the heat insulating resin layer 200, the opening at one end of the phase change groove 201 forms a first opening, the opening at the other end forms a second opening, and the second opening is blocked by the support outer plate 300. By the arrangement, the processing of the phase change groove 201 can be simplified, the cost is reduced, the volume of the phase change chamber 500 is increased, and meanwhile, the structural strength of the packaging box body is ensured.

Illustratively, as shown in fig. 5 and 6, the phase change groove 201 includes a first stripe groove extending in the stacking direction of the cell stack 3, and a plurality of second stripe grooves extending in the first direction and disposed at intervals in the stacking direction of the cell stack 3, the first direction being perpendicular to the stacking direction of the cell stack 3, the second stripe grooves and the first stripe grooves being disposed to intersect and are symmetrical with respect to the first stripe grooves. The lengths of the plurality of second grooves may be different or the same. In other embodiments, crisscrossed grid-shaped phase change grooves 201 may be used, and other shapes of phase change grooves 201 may be used, which are not shown here.

Alternatively, as shown in fig. 3, 5 and 6, the support outer plate 300 includes an outer plate body 301 and a blocking plate 302 fixed to the outer plate body 301, a filling passage 3011 penetrating through the outer plate body 301 in the thickness direction thereof and facing the second opening is provided, and the blocking plate 302 is inserted into the filling passage 3011 from an end of the filling passage 3011 facing away from the heat conductive inner plate 100 in a sealing manner.

Optionally, the vacuum level within the phase change chamber 500 is 70% -80%. The heat conduction is not facilitated due to the fact that the vacuum degree is too high, the heat energy storage is not facilitated due to the fact that the vacuum degree is too low, the heat energy storage capacity is reduced, the phase change chamber 500 is set to be 70% -80%, and the heat energy can be stored by the phase change medium on the basis of guaranteeing the heat conduction efficiency. The vacuum degree in the phase-change chamber 500 can be properly adjusted for different types of stacks 3 to meet the requirements of the operating temperature of the stacks 3.

Alternatively, opposite side surfaces of the heat insulating resin layer 200 are respectively adhered and fixed to the heat conductive inner plate 100 and the support outer plate 300. Specifically, the adhesive bonding and pressing are adopted for fixation, and the fixation mode is simple and low in cost.

Alternatively, the side walls of the package plate extending in the thickness direction thereof are each covered with a sealing side plate 400, and opposite ends of the sealing side plate 400 are fixed to the heat conductive inner plate 100 and the support outer plate 300, respectively. So set up, not only can play sealed effect to the vacuum of effective whole phase transition cavity 500 can also utilize heat conduction inner panel 100, support planking 300 and sealed curb plate 400 to get up whole heat preservation resin layer 200 cladding, play the effect to heat preservation resin layer 200 protect. Illustratively, the sealing side plate 400 is an aluminum plate, and the sealing side plate 400 is welded and fixed with the heat conductive inner plate 100 and the sealing side plate 400.

Optionally, a plurality of encapsulation boards enclose into one end open-ended box structure, and two adjacent encapsulation boards welded fastening has the fixed mode simply, with low costs, firm in connection's advantage.

Specifically, the stack packaging box body further comprises a packaging end plate 2, and the plurality of packaging plates comprise a packaging back plate 13, a packaging top plate and a packaging bottom plate 11, and two packaging side plates 12, wherein the packaging back plate 13 is arranged with the packaging end plate 2 at intervals along the stacking direction of the stacks 3, the packaging top plate and the packaging bottom plate 11 are distributed at intervals along the first direction, and the two packaging side plates 12 are distributed at intervals along the second direction; the first direction, the second direction, and the stacking direction of the stacks 3 are perpendicular to each other.

For convenience of description, for example, a package board on which the filling passage 3011 is not provided on the support outer plate 300 is referred to as a first package board, and a package board on which the filling passage 3011 is provided on the support outer plate 300 is referred to as a second package board. The package bottom plate 11 adopts a first package plate, and the package back plate 13, the package top plate and the package side plate 12 adopt a second package plate. The first packaging plate and the second packaging plate can adopt the same phase change medium, can also adopt different phase change media, and can expand the temperature interval by adopting different phase change media.

Specifically, the heat conductive inner plate 100 is an aluminum plate having a thickness of 4mm, and the support outer plate 300 is an aluminum plate having a thickness of 2 mm. For the first package board, paraffin is filled in the phase-change groove 201 of the thermal insulation resin layer 200 as a phase-change material, and when the shape and the size of the phase-change groove 201 are determined, taking the phase-change medium as paraffin as an example, the vacuum degree of the phase-change chamber 500 can meet the requirement by limiting the volume of the filled paraffin; and then the heat conduction inner plate 100, the heat insulation resin layer 200 and the support outer plate 300 are stuck and pressed for forming, and an aluminum plate with the thickness of 2mm is welded and fixed on the circumferential side wall in the thickness direction of the heat insulation resin layer 200 to serve as a sealing side plate 400, so that the thickness of the packaging inner plate is ensured, and the weight reduction and the external welding performance are both considered.

For the second package board, the heat-conducting inner board 100, the heat-insulating resin layer 200 and the outer board body 301 are adhered and pressed to be formed, the phase-change medium is filled into the phase-change groove 201 through the filling channel 3011 on the outer board body 301, and when the insertion depth of the plugging board 302, the size and shape of the phase-change groove 201 and the size and shape of the filling channel 3011 are determined, taking the phase-change medium as paraffin as an example, the vacuum degree of the phase-change chamber 500 can meet the requirement by limiting the filled paraffin volume; and then, an aluminum plate with the thickness of 2mm is welded and fixed on the circumferential side wall of the thickness direction of the heat insulation resin layer 200 to serve as a sealing side plate 400, and the light weight and the external welding performance are both considered on the basis of ensuring the thickness of the inner plate of the package.

In other embodiments, the package bottom plate 11, the package back plate 13, the package top plate, and the package side plate 12 may all be a first package plate, and may all be a second package plate.

Alternatively, the wall surface of the heat conductive inner plate 100 facing away from the heat insulating resin layer 200 is provided with an insulating layer, and the wall surface of the support outer plate 300 facing away from the heat insulating resin layer 200 is provided with an insulating layer. By the arrangement, the insulation performance of the galvanic pile packaging box body can be guaranteed. Illustratively, an insulating layer is formed by spraying an insulating material on the wall surface of the heat-conducting inner plate 100 facing away from the heat-insulating resin layer 200, and an insulating layer is formed by spraying an insulating material on the wall surface of the support outer plate 300 facing away from the heat-insulating resin layer 200, so that the insulating performance of the electric pile 3 is ensured to be greater than 20mΩ/kV.

The embodiment also provides a fuel cell, which comprises the above-mentioned cell stack packaging box body and the cell stack 3 arranged in the cell stack packaging box body, and has the same beneficial effects as those of the cell stack packaging box body, and the description is not repeated here.

Furthermore, the foregoing description of the preferred embodiments and the principles of the utility model is provided herein. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims

1. The galvanic pile packaging box body comprises a packaging main body (1), wherein the packaging main body (1) is provided with a plurality of packaging boards, and is characterized in that the packaging boards comprise a heat insulation resin layer (200), a heat conduction inner plate (100) which is arranged on the inner side of the heat insulation resin layer (200) in a laminated manner, and a support outer plate (300) which is arranged on the outer side of the heat insulation resin layer (200) in a laminated manner;

the heat insulation resin layer (200), the heat conduction inner plate (100) and the support outer plate (300) enclose a phase change cavity (500), and the phase change cavity (500) is filled with a phase change medium.

2. The stack packaging box according to claim 1, characterized in that the insulating resin layer (200) is provided with a phase change groove (201), the phase change groove (201) having at least a first opening facing the heat conductive inner plate (100), the first opening being blocked by the heat conductive inner plate (100).

3. The stack packaging box according to claim 2, wherein the phase change groove (201) is provided through in a thickness direction of the heat insulating resin layer (200), an opening at one end of the phase change groove (201) forms the first opening, and an opening at the other end forms a second opening, the second opening being blocked by the support outer plate (300).

4. A stack packaging box according to claim 3, wherein the supporting outer plate (300) comprises an outer plate body (301) and a plugging plate (302) fixed on the outer plate body (301), a filling channel (3011) penetrating through the outer plate body (301) in the thickness direction and opposite to the second opening is arranged on the outer plate body (301), and the plugging plate (302) is inserted into the filling channel (3011) from one end of the filling channel (3011) opposite to the heat conducting inner plate (100) in a sealing manner.

5. Galvanic pile packaging box according to any one of claims 1-4, characterized in that the vacuum in the phase change chamber (500) is 70-80%.

6. The stack packaging box according to any one of claims 1 to 4, wherein opposite side surfaces of the insulating resin layer (200) are respectively adhered and fixed to the heat conductive inner plate (100) and the support outer plate (300);

7. The stack package can according to any one of claims 1 to 4, wherein the package plate is coated with sealing side plates (400) on side walls extending in a thickness direction thereof, and opposite ends of the sealing side plates (400) are fixed to the heat conductive inner plate (100) and the support outer plate (300), respectively.

8. The stack packaging box according to any one of claims 1 to 4, wherein the insulating resin layer (200) is a glass fiber resin structure; and/or the heat conductive inner plate (100) and the support outer plate (300) are aluminum plates.

9. The stack packaging box according to any one of claims 1 to 4, wherein a wall surface of the heat conductive inner plate (100) facing away from the heat insulating resin layer (200) is provided with an insulating layer, and a wall surface of the support outer plate (300) facing away from the heat insulating resin layer (200) is provided with an insulating layer.

10. Fuel cell comprising a stack (3), and a stack packaging box according to any one of claims 1 to 9, said stack (3) being packaged in said stack packaging box.