CN217035704U - Bipolar plate, galvanic pile and plugging tool - Google Patents

Abstract

The utility model provides a bipolar plate, a galvanic pile and a plugging tool, which comprises: the cooling device comprises a body, a cooling device and a control device, wherein the body is provided with a cooling manifold port and a plurality of cooling liquid channels arranged at intervals, the cooling liquid channels are used for cooling liquid to circulate, and the cooling liquid channels are communicated with the cooling manifold port; and the plugging part is used for plugging part of the cooling liquid channels. Through the technical scheme that this application provided, can solve among the prior art and be close to the problem on the low side of bipolar plate temperature of end plate position department.

Description

Bipolar plate, galvanic pile and plugging tool

Technical Field

The utility model relates to the field of fuel cells, in particular to a bipolar plate, a galvanic pile and a plugging tool.

Background

The fuel cell's pile includes casing, a plurality of battery cell and two end plates that set up side by side usually, and the casing has the opening that holds chamber and two relative settings, and two openings all set up with holding the chamber intercommunication, and a plurality of battery cell and two end plates all are located and hold the intracavity, and two end plates are located a plurality of battery cell's both ends respectively, and two end plates are used for two openings of shutoff casing respectively. Wherein the plurality of unit cells are stacked by a plurality of bipolar plates and membrane electrode assemblies. In the existing electric pile, the voltage of the single battery close to the end plate is low, so that the performance of the whole electric pile is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a bipolar plate, a galvanic pile and a plugging tool, which aim to solve the problem that the temperature of the bipolar plate close to an end plate is low in the prior art.

According to an aspect of the present invention, there is provided a bipolar plate, including: the cooling device comprises a body, a first cooling pipe and a second cooling pipe, wherein the body is provided with a cooling manifold opening and a plurality of cooling liquid channels arranged at intervals, the cooling liquid channels are used for cooling liquid to circulate, and the cooling liquid channels are communicated with the cooling manifold opening; the plugging part is used for plugging part of the cooling liquid channels.

Further, the blocking part is provided separately from the main body.

Further, the cooling liquid channel comprises a plurality of first circulation channels and a plurality of second circulation channels, the first circulation channels and the second circulation channels are arranged alternately, and the blocking portion blocks the first circulation channels or the second circulation channels.

According to another aspect of the present invention, there is provided a stack including: the shell is provided with a mounting cavity and two openings, the two openings are communicated with the mounting cavity, and the two openings are oppositely arranged at two ends of the mounting cavity; the two end plates are positioned in the mounting cavity, correspond to the two openings respectively and are used for plugging the two openings; the first bipolar plates and the second bipolar plates are arranged in the installation cavity, the first bipolar plates and the second bipolar plates are located between the two end plates, the first bipolar plates are located on two sides of the installation cavity respectively, the second bipolar plates are located between the first bipolar plates arranged on two sides of the installation cavity, and the first bipolar plates are bipolar plates in the installation cavity.

According to another aspect of the present invention, there is provided a plugging tool, including: a support; the bipolar plate comprises an upper die and a lower die which are arranged in a split manner, wherein at least one of the upper die and the lower die is arranged on a bracket, the lower die and the upper die are arranged oppositely, an accommodating cavity is formed between the upper die and the lower die, the upper die and the lower die are detachably connected, the accommodating cavity is used for accommodating a bipolar plate, one end of the bipolar plate is positioned on the inner side of the accommodating cavity, and the other end of the bipolar plate is positioned on the outer side of the accommodating cavity; the plugging tool is used for plugging the part, located outside the accommodating cavity, of the bipolar plate so as to plug part of cooling liquid channels of the bipolar plate.

Furthermore, the plugging tool further comprises a fastener, and the upper die and the lower die are detachably connected through the fastener.

Further, the fastener is provided with a plurality ofly along the periphery interval of last mould.

Furthermore, the accommodating cavity is provided with a first opening end and a first plugging end which are arranged oppositely, the plugging tool further comprises an illuminating piece, the illuminating piece is arranged on at least one of the upper die or the lower die, and the illuminating piece is located in the accommodating cavity and located close to the first opening end.

Further, the stand includes: a support portion; the mounting box is provided with a second opening end and a closed end which are oppositely arranged, and the mounting box is used for placing the upper die and the lower die; the supporting shaft is provided with a fixed end and a free end which are oppositely arranged, the fixed end is arranged on the supporting part, the closed end of the mounting box is rotatably arranged on the supporting shaft, and the free end of the supporting shaft is arranged to protrude out of the mounting box; and the locking nut is sleeved at the free end of the supporting shaft and is in threaded connection with the supporting shaft.

Further, the support portion includes: the fixing cylinder is vertically arranged, and a first mounting hole is formed in the peripheral surface of the fixing cylinder; the sliding rod is movably arranged on the fixed cylinder and is vertically provided with a plurality of second mounting holes, the top end of the sliding rod protrudes out of the fixed cylinder, and the fixed end of the supporting shaft is fixedly arranged on the sliding rod; and the fixing pin passes through the first mounting hole at one end and optionally passes through the second mounting hole at the position.

By applying the technical scheme of the utility model, part of the cooling liquid channels are plugged by the plugging part, so that the flow of cooling liquid in the bipolar plate can be reduced, and the heat loss of the bipolar plate is reduced. The bipolar plates are arranged close to the end plates, so that the temperature difference between the bipolar plates and the bipolar plates in the middle of the galvanic pile can be reduced, the voltage consistency between the monocells close to the end plates and the monocells in the middle of the galvanic pile is ensured, and the performance of the galvanic pile is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural view illustrating a bipolar plate according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a flow channel provided in an embodiment of the present invention;

fig. 3 shows a schematic structural diagram of a plugging tool provided in an embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating the structure of the upper mold, the lower mold and the bipolar plate provided by the embodiment of the utility model;

fig. 5 is a schematic diagram illustrating an explosion structure of the upper mold and the lower mold according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a body; 11. a cooling manifold port; 12. a first flow-through channel; 13. a second flow-through channel;

20. a plugging section;

30. a support;

311. a fixed cylinder; 312. a slide bar; 3121. a second mounting hole; 313. a fixing pin;

32. installing a box;

33. locking the nut;

41. an upper die; 42. a lower die; 43. an illuminating member.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

As shown in fig. 1 and 2, an embodiment of the present invention provides a bipolar plate, which includes: a body 10 and a closure 20. The body 10 has a cooling manifold port 11, the body 10 has a plurality of cooling liquid channels arranged at intervals, the cooling liquid channels are used for circulating cooling liquid, and the cooling liquid channels are communicated with the cooling manifold port 11. The blocking portion 20 is used to block part of the coolant passage.

By applying the technical scheme of the utility model, part of the cooling liquid channels are plugged by the plugging part 20, so that the flow of cooling liquid in the bipolar plate can be reduced, and the heat loss of the bipolar plate is reduced. The bipolar plates are arranged close to the end plates, so that the temperature difference between the bipolar plates and the bipolar plates in the middle of the electric pile can be reduced, the voltage consistency between the monocells close to the end plates and the monocells in the middle of the electric pile is ensured, and the performance of the electric pile is improved. In addition, the arrangement ensures the integrity of the stack structure without introducing additional components, does not need to add additional assembly procedures, and can effectively ensure the assembly efficiency of the stack.

Further, the closing part 20 and the main body 10 may be formed integrally or may be formed separately. In the present embodiment, the blocking portion 20 and the main body 10 are two independent structures. In this way, the number of the plugging portions 20 can be adjusted at any time according to the plugging requirement. The plugging portion 20 may be formed by curing liquid silicone. With such an arrangement, the sealing effect of the blocking portion 20 on the coolant passage can be ensured. In addition, the body 10 is formed by welding or bonding the anode plate and the cathode plate, and by applying the technical scheme of the utility model, the liquid silica gel is solidified and formed on the body 10 without improving the cathode plate or the anode plate, so that the process is simple and the cost is saved. Particularly, when the cooling liquid channel is plugged, the liquid silica gel can be injected into the opening of the cooling liquid channel through the injector. The plugging depth can be determined according to the specific structure of the bipolar plate, and the scheme does not limit the plugging depth.

When the cooling liquid channel is plugged, the cooling liquid channel can be sequentially plugged from one end along the arrangement direction of the cooling liquid channel. In the present embodiment, the coolant passage includes a plurality of first circulation passages 12 and a plurality of second circulation passages 13, the first circulation passages 12 and the second circulation passages 13 are alternately arranged, and the blocking portion 20 blocks the first circulation passages 12 or the second circulation passages 13. The blocking portion 20 in this embodiment is for blocking the second flow passage 13. So set up for inside the coolant liquid can flow into body 10 uniformly, guarantee the homogeneity and the smoothness nature of coolant liquid at the inside mobile of body 10, and then can guarantee the uniformity to body 10 cooling effect, guarantee the uniformity between the body 10 temperature everywhere.

The material used for plugging is not limited to the liquid silica gel, but can be solid rubber or other materials. In another embodiment of the present embodiment, the blocking portion 20 is a plurality of blocking blocks made of a solid rubber material, the number of the blocking blocks is the same as the number of the second flow passages 13, and the plurality of blocking blocks are provided in one-to-one correspondence with the plurality of second flow passages 13. At least part of the block is inserted into the second flow path 13 and blocks the second flow path 13. Specifically, when the second flow path 13 is closed, the closing block may be pressed into the second flow path 13. So set up, can guarantee the convenience of shutoff piece to the shutoff of second circulation passageway 13. Moreover, the block made of the solid rubber material has elasticity and can deform, and the sealing effect on the second flow channel 13 can be ensured.

Yet another embodiment of the present invention provides a stack including a case, two end plates, a plurality of first bipolar plates, and a plurality of second bipolar plates. The casing has installation cavity and two openings, and two openings all communicate with the installation cavity, and two openings set up the both ends at the installation cavity relatively. Two end plates all are located the installation intracavity, and two end plates correspond two opening settings respectively to carry out the shutoff to two openings. The first bipolar plates and the second bipolar plates are arranged in the installation cavity, the first bipolar plates and the second bipolar plates are located between the two end plates, the first bipolar plates are located on two sides of the installation cavity respectively, the second bipolar plates are located between the first bipolar plates arranged on two sides of the installation cavity, and the first bipolar plates are the bipolar plates provided in the above embodiments. According to the specific use condition of the electric pile, a plurality of first bipolar plates are arranged at positions close to the end plates so as to reduce the dissipation of heat at the positions close to the end plates.

As shown in fig. 3 to 5, a further embodiment of the present invention provides a plugging tool for plugging a bipolar plate, wherein the plugging tool includes a bracket 30, and an upper die 41 and a lower die 42 which are separately arranged. At least one of the upper die 41 and the lower die 42 is arranged on the bracket 30, the lower die 42 and the upper die 41 are arranged oppositely, an accommodating cavity is formed between the upper die 41 and the lower die 42, the upper die 41 and the lower die 42 are detachably connected, the accommodating cavity is used for placing a bipolar plate, one end of the bipolar plate is positioned on the inner side of the accommodating cavity, and the other end of the bipolar plate is positioned on the outer side of the accommodating cavity; the plugging tool is used for plugging the part, located on the outer side of the containing cavity, of the bipolar plate so as to plug part of cooling liquid channels of the bipolar plate. Above-mentioned setting can be when carrying out the shutoff to second circulation passageway 13, fixes a position bipolar plate, guarantees bipolar plate's stability, and then can guarantee the shutoff effect to second circulation passageway 13. The bipolar plate can be plugged by the plugging block on the plugging tool, and can also be plugged by the dispensing process.

When the blocking block is used for blocking the second circulation channel 13, the bipolar plate is placed in the accommodating cavity, one end of the bipolar plate exposed out of the accommodating cavity faces to a worker, the worker holds tweezers, the blocking block is clamped up, and the blocking block is extruded into the second circulation channel 13, so that the blocking operation can be completed.

When the second circulation channel 13 is subjected to glue dispensing and plugging, the bipolar plate is placed in the containing cavity, one end of the bipolar plate exposed out of the containing cavity faces to a worker, the worker aligns an injector filled with liquid silica gel to the second circulation channel 13 and injects the liquid silica gel into the second circulation channel 13, and then the bipolar plate stands for a period of time until the liquid silica gel is solidified.

At the in-process of gluing, liquid silica gel probably appears dripping to the condition that holds the chamber, will go up mould 41 and lower mould 42 and set up to detachable construction, can make things convenient for the staff to clear up the liquid silica gel that drips to last mould 41 or lower mould 42 in time, guarantees mould 41 and lower mould 42's clean and tidy nature, and then can guarantee to holding the smooth and easy nature that body 10 was placed to the intracavity.

In this embodiment, the plugging tool further includes a fastener, and the upper die 41 and the lower die 42 are detachably connected by the fastener. The fastener is arranged, the structure is simple, and the upper die 41 and the lower die 42 are convenient to disassemble and assemble. Specifically, the fastening member is a fastening bolt that passes through the upper die 41 and is screwed with the lower die 42.

Further, a plurality of fasteners are provided at intervals along the outer periphery of the upper die 41. Above-mentioned setting can guarantee the fixed effect of fastener to last mould 41 and lower mould 42, simultaneously, can guarantee the homogeneity of mould 41 and lower mould 42 atress, guarantees the life-span of mould 41 and lower mould 42.

Specifically, the accommodating cavity has a first opening end and a first plugging end which are arranged oppositely, the plugging tool further comprises an illuminating piece 43, the illuminating piece 43 is arranged on at least one of the upper die 41 or the lower die 42, and the illuminating piece 43 is located in the accommodating cavity and located near the first opening end. In this embodiment, a receiving groove for receiving the body 10 is formed at a side of the lower mold 42 adjacent to the upper mold 41, and the illuminating member 43 is formed at a side of the upper mold 41 adjacent to the lower mold 42. The setting of illumination piece 43 can make things convenient for the staff to observe the concrete position of second circulation passageway 13, promotes the injection precision.

Further, the bracket 30 includes a support portion, a mounting case 32, a support shaft, and a lock nut 33. Wherein the mounting case 32 has a second open end and a closed end disposed oppositely, and the mounting case 32 is used for placing the upper mold 41 and the lower mold 42. The back shaft has relative stiff end and the free end that sets up, and the stiff end setting is on the supporting part, and the closed end of install bin 32 has the backing sheet, and the backing sheet is rotationally worn to establish on the back shaft. The locking nut 33 is sleeved on the free end of the support shaft and is in threaded connection with the support shaft. Above-mentioned setting, can adjust the angle of install bin 32 according to the staff's of difference operation custom, make things convenient for the staff to carry out the shutoff to second circulation passageway 13 and handle, promote the convenience of gluing. In addition, the arrangement of the supporting shaft and the locking nut 33 can improve the rotating range of the installation box 32, and the structure is simple and the operation is convenient.

Specifically, the mounting case 32 has a placing cavity and an opening communicating with the placing cavity, one end of the mounting case 32 having the opening is a second opening end, and the other end of the mounting case 32 is a closed end. When the bipolar plate is subjected to the plugging process, the upper mold 41 and the lower mold 42 accommodating the bipolar plate are placed in the placing cavity, and the second open end of the accommodating cavity of the bipolar plate is placed outside the mounting case 32. So set up, can conveniently place mould 41 and lower mould 42 in install bin 32, promote the convenience of placing mould 41 and lower mould 42.

Further, two sets of the supporting portions are provided, and the two sets of the supporting portions are respectively provided at both end portions of the closed end of the mounting case 32. The back shaft is provided with two, and two back shafts correspond the setting with two sets of supporting parts respectively. The two supporting sheets are respectively fixed at two end parts of the closed end and respectively and rotatably arranged on the two supporting shafts.

Specifically, the support portion includes a fixed cylinder 311, a slide lever 312, and a fixed pin 313. The fixed cylinder 311 is vertically disposed, and a first mounting hole is disposed on a circumferential surface of the fixed cylinder 311. The sliding rod 312 is movably disposed on the fixed cylinder 311, a plurality of second mounting holes 3121 are vertically disposed on the sliding rod 312, and the fixed end of the supporting shaft is fixedly disposed on the sliding rod 312. The fixing pin 313 has one end passing through the first mounting hole and is positioned to selectively pass through the second mounting hole 3121. The height of the supporting part can be adjusted through the fixing pin 313, so that different workers can conveniently plug the second circulation channel 13, and convenience of the workers in dispensing is further improved.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

In the description of the present invention, it is to be understood that the directions or positional relationships indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the directions or positional relationships shown in the drawings, and are for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …", "above … …", "above … …", "above", and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A bipolar plate, comprising:

the cooling device comprises a body (10), wherein the body (10) is provided with a cooling manifold port (11), the body (10) is provided with a plurality of cooling liquid channels which are arranged at intervals and are used for circulating cooling liquid, and the cooling liquid channels are communicated with the cooling manifold port (11);

a blocking portion (20), wherein the blocking portion (20) is used for blocking part of the cooling liquid channel.

2. A bipolar plate as claimed in claim 1, wherein the blocking portion (20) is arranged separately from the body (10).

3. A bipolar plate according to claim 1, characterised in that the coolant channels comprise a plurality of first flow channels (12) and a plurality of second flow channels (13), the first flow channels (12) and the second flow channels (13) being arranged alternately, the blocking portion (20) blocking the first flow channels (12) or the second flow channels (13).

4. A stack, comprising:

the shell is provided with an installation cavity and two openings, the two openings are communicated with the installation cavity, and the two openings are oppositely arranged at two ends of the installation cavity;

the two end plates are positioned in the mounting cavity, are respectively arranged corresponding to the two openings and can seal the openings;

a plurality of first bipolar plates and a plurality of second bipolar plates, both disposed in the mounting cavity, the first bipolar plates and the second bipolar plates being located between the two end plates, and the plurality of first bipolar plates being located on both sides of the mounting cavity, respectively, and the plurality of second bipolar plates being located between the first bipolar plates disposed on both sides of the mounting cavity, the first bipolar plates being the bipolar plates of any one of claims 1 to 3.

5. The utility model provides a shutoff frock, its characterized in that, the shutoff frock includes:

a bracket (30);

the bipolar plate comprises an upper die (41) and a lower die (42) which are arranged in a split mode, wherein at least one of the upper die (41) and the lower die (42) is arranged on the support (30), the lower die (42) and the upper die (41) are arranged oppositely, an accommodating cavity is formed between the upper die (41) and the lower die (42), the upper die (41) and the lower die (42) are detachably connected, the accommodating cavity is used for placing a bipolar plate, one end of the bipolar plate is located on the inner side of the accommodating cavity, and the other end of the bipolar plate is located on the outer side of the accommodating cavity;

the plugging tool is used for plugging the part, located outside the containing cavity, of the bipolar plate so as to plug part of cooling liquid channels of the bipolar plate.

6. The plugging tool according to claim 5, further comprising a fastener, wherein the upper die (41) and the lower die (42) are detachably connected through the fastener.

7. The plugging tool according to claim 6, wherein the fasteners are arranged along the periphery of the upper die (41) at intervals.

8. The plugging tool according to claim 5, wherein the accommodating cavity has a first opening end and a first plugging end which are opposite to each other, the plugging tool further comprises an illuminating piece (43), the illuminating piece (43) is arranged on at least one of the upper die (41) or the lower die (42), and the illuminating piece (43) is located in the accommodating cavity and located close to the first opening end.

9. Plugging tool according to claim 5, characterized in that said support (30) comprises:

a support portion;

a mounting box (32), wherein the mounting box (32) is provided with a second opening end and a closed end which are oppositely arranged, and the mounting box (32) is used for placing the upper die (41) and the lower die (42);

the supporting shaft is provided with a fixed end and a free end which are oppositely arranged, the fixed end is arranged on the supporting part, the closed end of the mounting box (32) is rotatably arranged on the supporting shaft, and the free end of the supporting shaft is arranged to protrude out of the mounting box (32);

and the locking nut (33), the locking nut (33) is sleeved at the free end of the supporting shaft and is in threaded connection with the supporting shaft.

10. The plugging tool according to claim 9, wherein the support portion comprises:

the fixing barrel (311) is vertically arranged, and a first mounting hole is formed in the peripheral surface of the fixing barrel (311);

the sliding rod (312) is movably arranged on the fixed cylinder (311), a plurality of second mounting holes (3121) are vertically arranged on the sliding rod (312), the top end of the sliding rod (312) is arranged to protrude out of the fixed cylinder (311), and the fixed end of the supporting shaft is fixedly arranged on the sliding rod (312);

a fixing pin (313), one end of the fixing pin (313) passing through the first mounting hole and optionally passing through the second mounting hole (3121).

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