CN115411333A - Fastening pull rod, fuel cell stack, fuel cell module and vehicle - Google Patents
Fastening pull rod, fuel cell stack, fuel cell module and vehicle Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/249—Grouping of fuel cells, e.g. stacking of fuel cells comprising two or more groupings of fuel cells, e.g. modular assemblies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention discloses a fastening pull rod, a fuel cell stack, a fuel cell module and a vehicle, which improve the universality of parts, can meet the high fastening of the stack with various power requirements, provide various power options and reduce the cost. This fastening pull rod is used for connecting fuel cell's blind end plate subassembly and inlet end plate, the fastening pull rod is length-adjustable's structure, including first pull rod and second pull rod, first pull rod and second pull rod overlap at least partially and can dismantle the connection, keep off the position through the regulation that sets up the fastening pull rod, confirm the optional fastening length of fastening pull rod, the fastening length that the difference kept off the position corresponds the pile of co-altitude not, also correspond the piece number of different reactor core monocells, thereby correspond different pile powers, make a set of pile part can generally satisfy different power demands, match the pile fastening height of co-altitude, be favorable to the cost control of pile, the power volume ratio and the power quality ratio of low-power pile have been promoted.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a fastening pull rod, a fuel cell stack, a fuel cell module and a vehicle.
Background
A Proton Exchange Membrane Fuel Cell (PEMFC) is a power generation device that directly converts chemical energy of fuel into electric energy, and has the advantages of low working temperature, fast start, high specific power, simple structure, convenient operation, etc., so the fuel cell is widely applied to the industries of automobile industry, energy generation, ship industry, aerospace, household power supply, etc.
Fuel cells are developed in the evening and the market demands for power are different. Meanwhile, high cost is one of the important obstacles restricting the popularization of the fuel cell stack. In order to meet the market demand, various power options are required and the cost is reduced, but the current fuel cell cannot meet the market demand.
Disclosure of Invention
In order to solve the technical problems, the invention provides a fastening pull rod, a fuel cell stack, a fuel cell module and a vehicle, which can improve the universality of parts so as to match the stack fastening heights with different power requirements.
The technical purpose of the invention is realized by the scheme that the fastening pull rod is used for connecting a blind end plate assembly and an air inlet end plate of a fuel cell, is of a length-adjustable structure and comprises a first pull rod and a second pull rod, and the first pull rod and the second pull rod are at least partially overlapped and detachably connected.
In some embodiments, the first pull rod and the second pull rod are connected in a positioning manner through a positioning structure, and at least two connecting positions for installing the positioning structure are arranged on the first pull rod and/or the second pull rod; the at least two connecting positions are arranged at intervals along the length direction of the first pull rod/the second pull rod.
In some embodiments, the first pull rod and the second pull rod are both provided with positioning holes; and/or the first pull rod and the second pull rod are provided with a positioning table and a positioning hole which are matched with each other;
the positioning structure is a positioning pin and/or the positioning table; the positioning hole forms the connecting position, and the positioning table/the positioning pin is arranged in the positioning hole.
In some embodiments, the first and second tie rods each include a tie rod body and a connecting portion connected to one end of the tie rod body; the connecting part comprises an end plate connecting part used for connecting an end plate and a body connecting part used for connecting the pull rod body, and the body connecting part and the pull rod body are arranged in an angle mode.
In some embodiments, the pull rod body includes a connecting limiting portion and an abutting portion, the body connecting portion is connected to the limiting portion, and the connecting portion is disposed on the abutting portion.
In certain embodiments, the abutment of the first tie rod is a flat plate; the butt joint part of the second pull rod is a plate with an L-shaped cross section, and the butt joint part of the first pull rod is arranged in an L-shaped groove of the plate with the L-shaped cross section.
In some embodiments, the limiting part of the first pull rod is identical in structure with the limiting part of the second pull rod; the width of the limiting part is the same as that of the butt joint part of the second pull rod; the thickness of the limiting part is the same as that of the butt joint part of the second pull rod;
the cross section size of the butt joint part of the first pull rod is matched with the L-shaped groove of the butt joint part of the first pull rod.
In certain embodiments, the fastening tie rod further comprises an insulating support; and the fastening pull rod and/or the insulating support piece are/is provided with a limiting structure.
In some embodiments, the insulating support has a sink receiving the fastening tie; a limiting hole is formed in the groove surface of the sinking groove;
the positioning table/positioning pin of the fastening pull rod and the limiting hole form the limiting structure; and/or a limiting table matched with the limiting hole is arranged on the lower surface of one of the first pull rod and the second pull rod, which is closer to the insulating support piece, and the limiting table and the limiting hole form the limiting structure.
Based on the same inventive concept, the invention also provides a fuel cell stack, which comprises,
the reactor body comprises a blind end plate assembly, a blind end collector plate, a reactor core, an air inlet end collector plate and an air inlet end plate which are sequentially arranged along the stacking direction;
the fastening assembly comprises at least two fastening pull rods, and the first pull rod and the second pull rod of each fastening pull rod are respectively connected with the blind end plate assembly and the air inlet end plate;
and the core equivalent body is clamped in the stack body and positioned on at least one side of the core along the stacking direction so as to match the fastening assembly to adjust the height of the fuel cell stack.
In certain embodiments, the core equivalent comprises at least one equivalent.
In some embodiments, the equivalent piece is a conductive piece, and the equivalent piece is matched with the bipolar plate of the core in shape, and the equivalent piece is arranged on one side of the gas collecting plate and/or the blind end collecting plate close to the core.
In certain embodiments, the equivalent comprises a bipolar plate equivalent and/or a membrane electrode equivalent.
In some embodiments, the equivalent piece is an insulator, and the equivalent piece is arranged on the side of the air intake collector plate and/or the blind end collector plate far away from the core.
In some embodiments, the core equivalent comprises at least two equivalent parts, and a sealing ring is arranged between two adjacent equivalent parts and between the equivalent parts and the stack body.
In certain embodiments, the thickness of the core equivalent is an integer multiple of the thickness of the single cells of the core under the application of the fastening force by the fastening assembly.
In some embodiments, at least one of said equivalent members is provided with lightening holes.
Based on the same inventive concept, the invention also provides a fuel cell module which comprises the fuel cell stack.
Based on the same inventive concept, the invention also provides a vehicle, which comprises the fuel cell stack; alternatively, the fuel cell module described above.
According to the technical scheme, the fastening pull rod is used for connecting a blind end plate assembly and an air inlet end plate of a fuel cell, the fastening pull rod is of a structure with adjustable length and comprises a first pull rod and a second pull rod, the first pull rod and the second pull rod are at least partially overlapped and detachably connected, the optional fastening length of the fastening pull rod is determined by setting the adjusting gear of the fastening pull rod, the fastening lengths of different gears correspond to the electric piles with different heights and the number of single cells of different reactor cores, so that the fastening pull rod can be fastened universally on the electric pile modules designed with different powers corresponding to different power pile powers, a set of electric pile parts can meet different power requirements and the fastening heights of the electric piles with different power requirements, the cost control of the electric piles is facilitated, and the power volume ratio and the power-to-mass ratio of the low-power electric piles are improved.
The invention provides a fuel cell stack, which comprises a stack body, a fastening assembly and a reactor core equivalent body, wherein: the reactor body comprises a blind end plate assembly, a blind end collector plate, a reactor core, an air inlet end collector plate and an air inlet end plate which are sequentially arranged along the stacking direction; the fastening assembly comprises at least two fastening pull rods, the first pull rod and the second pull rod of each fastening pull rod are detachably connected, and the far ends of the first pull rod and the second pull rod are respectively connected with the blind end plate assembly and the air inlet end plate so as to adapt to the pile height requirements of different power requirements and meet the fastening height of piles with different power requirements. Because the length of fastening pull rod is adjusted finiteness, can't realize the regulation of many gears, the reactor core equivalent body presss from both sides and locates in the reactor core, and is located the reactor core along the at least one side of piling up the direction to the height of fuel cell galvanic pile is adjusted to the cooperation fastening components, and the thickness of reactor core equivalent body is chooseed for use according to the power demand at the pressure equipment in-process, can greatly improve the universalization rate of part, reduces the cost of galvanic pile, is favorable to promoting the power volume ratio and the power quality ratio of low-power galvanic pile.
Drawings
Fig. 1 is a front view of a fastening drawbar according to embodiment 1 of the present invention;
FIG. 2 is a top view of the tightening lever of FIG. 1;
FIG. 3 is a rear view of the tightening lever of FIG. 1;
FIG. 4 is a front view of a first tie rod of the fastening tie rod of FIG. 1;
FIG. 5 is a top view of the first pull rod of FIG. 4;
FIG. 6 is a rear view of the first pull rod of FIG. 4;
FIG. 7 is a right side view of the first pull rod of FIG. 4;
FIG. 8 is a front view of a second tie rod of the fastening tie rod of FIG. 1;
FIG. 9 is a top view of the second pull rod of FIG. 8;
FIG. 10 is a rear view of the second pull rod of FIG. 8;
FIG. 11 is a left side elevational view of the second pull rod of FIG. 8;
FIG. 12 is a schematic view of the positioning structure of the tightening lever of FIG. 1;
FIG. 13 is a schematic view of the assembly of the first and second tie rods and the insulating support of FIG. 1;
fig. 14 is a schematic structural view of a fuel cell stack provided in embodiment 2 of the present invention;
fig. 15 is a left side view of the fuel cell stack of fig. 14;
fig. 16 is a block diagram showing the structure of a fuel cell module according to embodiment 3 of the present invention;
fig. 17 is a block diagram of a vehicle according to embodiment 4 of the present invention.
Description of the drawings: 100-fastening pull rod, 110-first pull rod, 120-second pull rod, 130-positioning hole, 140-positioning pin, 150-pull rod body, 151-limiting part, 152-butting part, 153-limiting table, 160-connecting part, 161-end plate connecting part, 162-body connecting part and 170-insulating supporting part;
200-fuel cell stack, 210-dead end plate assembly, 220-dead end collector plate, 230-reactor core, 240-gas inlet end collector plate and 250-gas inlet end plate; 260-core equivalent.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings by way of specific embodiments.
Fuel cells are developing day by day, and the market demands for power are varying. Meanwhile, high cost is one of the important obstacles restricting the popularization of the fuel cell stack. In order to meet the market demand, the invention provides a fastening pull rod, a fuel cell stack, a fuel cell module and a vehicle, which improve the universality of parts, can meet the high fastening demand of the stack with various power demands, provides various power choices and reduces the cost. The following four specific examples are provided to illustrate the invention in detail:
example 1
As shown in fig. 1 to 13, the present embodiment provides a fastening tie rod 100, configured to connect a dead end plate assembly 210 of a fuel cell and an intake end plate 250, where the fastening tie rod 100 is of a structure with an adjustable length, and includes a first tie rod 110 and a second tie rod 120, where the first tie rod 110 and the second tie rod 120 are at least partially overlapped and detachably connected, and an adjustable shift of the fastening tie rod 100 is set to determine an optional fastening length of the fastening tie rod 100, where fastening lengths of different shifts correspond to different height electric stacks, and also correspond to different numbers of core 230 single cells, so as to correspond to different stack powers, and thus, fastening common use of the fastening tie rod 100 in stack modules with different power designs can be achieved, so that a set of stack parts can meet different power requirements, match stack fastening heights with different power requirements, and contribute to cost control of the stack, and power volume ratio and power mass ratio of the low-power stack are improved.
The detachable connection structure of the first pull rod 110 and the second pull rod 120 is not particularly limited in this embodiment, and in some embodiments, the first pull rod 110 and the second pull rod 120 may be connected by a screw thread, and the length of the fastening pull rod 100 may be adjustable by changing the screwing length. Better stepless adjustment can be realized to the mode of screw connection, can more adapt to the pile of different height demands and power demand, but need carry out length measurement to fastening pull rod 100, and is relatively complicated when the equipment. And since the threaded connection is adjusted in a manner requiring relative rotation, the rotational position cannot be guaranteed, which may affect the connection with the blind end plate assembly 210 and the inlet end plate 250. In the scheme of threaded connection, the end portions of the first tie rod 110 and the second tie rod 120, which are used for connecting end plates of the stack, may be designed as cylindrical ends, mounting positions for accommodating the cylindrical ends are correspondingly arranged on the end plates, and threaded holes are concentrically arranged on the end faces of the cylindrical ends along the axis and are connected with the end plates through bolts.
Since the design values of power, the number of single cells and the height of the fuel cell stack 200 are preliminarily determined during design, in order to facilitate the general design of the fastening tie rod 100 for the fuel cell stacks 200 with different design values and simplify the structures of the first tie rod 110 and the second tie rod 120, while realizing the connection of different positions of the first tie rod 110 and the second tie rod 120, the connection positions of the first tie rod 110 and the second tie rod 120 are fixed to ensure the connection of the fastening tie rod 100 with the corresponding intake end plate 250 and the blind end plate assembly 210, as a preferred embodiment, the first tie rod 110 and the second tie rod 120 are connected in a positioning manner by a positioning structure, and the first tie rod 110 and/or the second tie rod 120 are provided with at least two connection positions for installing the positioning structure; at least two connecting positions are arranged at intervals along the length direction of the first pull rod 110/the second pull rod 120 so as to adjust the length of the fastening pull rod 100 together with the positioning structure.
In this embodiment, neither the positioning structure nor the connection position is specifically limited, and the positioning structure may be a part of the fastening rod 100 or an independent positioning member; the connecting position can be a light hole, a threaded hole or a butt joint edge for welding.
In some embodiments, to simplify the difficulty of detachable connection, the first pull rod 110 and the second pull rod 120 are both provided with positioning holes 130, the positioning holes 130 are light holes, and the positioning holes 130 constitute connection positions. At this time, the positioning structure may be the positioning pin 140, the positioning pin 140 may be selectively disposed in the positioning hole 130, and then at least one positioning hole 130 needs to be disposed on each of the first pull rod 110 and the second pull rod 120, and the total number of the positioning holes 130 on the first pull rod 110 and the second pull rod 120 is not less than three, so that the length adjustment selection of at least two gears can be realized. The positioning structure may also be a positioning table integrally formed on the first pull rod 110 and/or the second pull rod 120, and the other one of the positioning tables is correspondingly provided with a positioning hole 130 matching with the positioning table. That is, the first pull rod 110/the second pull rod 120 may be provided with a positioning table, and the second pull rod 120/the first pull rod 110 may be provided with a positioning hole 130, or both the first pull rod 110 and the second pull rod 120 may be provided with a positioning table and a positioning hole 130, and the multi-stage length adjustment may be realized by matching the distances.
In some embodiments, two positioning structures, namely, a positioning stage and a positioning pin 140, may also exist at the same time, and each positioning hole 130 may selectively receive one of the positioning stage and the positioning pin 140, for example, one positioning stage and one positioning hole 130 are provided at intervals on the first pull rod 110, two positioning holes 130 are provided at equal intervals on the second pull rod 120, under a first longer length specification, the first pull rod 110 and the second pull rod 120 are only connected with the positioning stage and the positioning hole 130 in a positioning manner, under a second middle shorter length specification, the overlapping portion of the first pull rod 110 and the second pull rod 120 is increased, and at this time, the overlapping portion is connected with the corresponding positioning hole 130 through the positioning stage and the positioning pin 140.
In the case of two connecting positions, one or two positioning stages are disposed on one of the first pull rod 110 and the second pull rod 120, and two positioning holes 130 are disposed on the other at intervals.
The present embodiment does not limit the arrangement structure of the positioning hole 130, and the positioning hole 130 may be a through hole or a blind hole, and may be adaptively adjusted according to the actual situation. In addition, the positioning hole 130 may be directly formed on the first pull rod 110/the second pull rod 120, or may be formed on a boss integrally formed on the first pull rod 110/the second pull rod 120.
In order to save space and secure the overall strength of the fastening tie rod 100, it is preferable that the first tie rod 110 and the second tie rod 120 are stacked in a direction out of the side of the fuel cell. In some embodiments, in order to ensure a creepage gap between the tie rod and the fuel cell core 230 and ensure electrical safety, each of the first and second tie rods 110 and 120 includes a tie rod body 150 and a connection part 160 connected to one end of the tie rod body 150; the connecting portion 160 includes an end plate connecting portion 161 for connecting an end plate and a body connecting portion 162 for connecting the drawbar body 150, and the body connecting portion 162 is disposed at an angle to the drawbar body 150.
Since the first pull rod 110 and the second pull rod 120 can slide relative to each other when the positioning structure is not disposed in the connection position, in some embodiments, in order to limit the overlapping portion of the first pull rod 110 and the second pull rod 120 and ensure that the first pull rod 110 and the second pull rod 120 do not exceed the set position, the pull rod body 150 includes a limiting portion 151 and an abutting portion 152, the body connection portion 162 is connected to the limiting portion 151, and the connection position is disposed on the abutting portion 152.
The structure and shape of the first pull rod 110 and the second pull rod 120 are not particularly limited in this embodiment, and in some embodiments, in order to further ensure the relative position between the first pull rod 110 and the second pull rod 120, facilitate adjustment, and facilitate the alignment between the positioning structure and the connection position, the abutting portion 152 of the first pull rod 110 may be a flat plate; the abutting portion 152 of the second pull rod 120 may be a plate with an L-shaped cross section, and the abutting portion 152 of the first pull rod 110 is disposed in the L-shaped groove of the L-shaped plate to play a role of guiding relative movement.
In another embodiment, the abutting portions 152 of the first and second tie bars 110 and 120 may be both plate members having L-shaped cross sections, and the first and second tie bars 110 and 120 may be disposed in the L-shaped grooves opposite to each other.
In other embodiments, the abutting portion 152 of the first and second tie rods 110 and 120 may be both flat plates.
In some embodiments, in order to control the volume of the fastening rod 100 while ensuring the connection strength, the limiting portion 151 of the first rod 110 is identical in structure to the limiting portion 151 of the second rod 120; the width of the limiting part 151 is the same as that of the abutting part 152 of the second pull rod 120; the thickness of the limiting part 151 is the same as that of the abutting part 152 of the second pull rod 120; the cross-sectional dimension of the abutment portion 152 of the first tie bar 110 matches the L-shaped slot of the abutment portion 152 of the first tie bar 110.
In some embodiments, in order to control the volumetric power ratio of the stack such that the fastening tie rod 100 has better strength, it is preferable that the stopper portion 151 of the first tie rod 110, the stopper portion 151 of the second tie rod 120, and the abutting portion 152 of the second tie rod 120 are parallel and coplanar in a state where the first tie rod 110 and the second tie rod 120 are overlapped and connected.
In some embodiments, to ensure insulation between the core 230 and the tie rods while providing support to the core 230 to prevent the core 230 from collapsing during use of the stack, the fastening tie rods 100 further include insulating supports 170; the fastening pull rod 100 and/or the insulating support 170 are/is provided with a limiting structure for limiting the relative movement of the fastening pull rod 100 and the insulating support 170.
The limiting structure is not specifically limited in this embodiment, and the existing positioning structure and connection position of the fastening pull rod 100 may be utilized, or a limiting structure may be additionally provided. In some embodiments, the insulating support 170 has a countersunk groove that receives the fastening bar 100, and the fastening bar 100 is integrally disposed in the countersunk groove, and a groove wall of the countersunk groove contacts at least one of the first bar 110 and the second bar 120.
As an embodiment, a limiting hole may be formed on the groove surface of the sinking groove, and the positioning table/positioning pin 140 of the fastening rod 100 is simultaneously disposed in the limiting hole and the positioning hole 130 of the fastening rod 100, and the positioning table/positioning pin 140 and the limiting hole together form a limiting structure.
In some embodiments, a limiting platform 153 matched with a limiting hole may be further disposed on a lower surface of one of the first pull rod 110 and the second pull rod 120 closer to the insulating support 170, and the limiting platform 153 and the limiting hole constitute a limiting structure.
The fastening pull rod 100 that this embodiment provided has different length adjustment and keeps off the position, the fastening length that the position was kept off to the difference corresponds the not high galvanic pile, also correspond the number of the piece of the 230 monocells of different reactor cores, thereby correspond different galvanic pile power, can realize that the fastening of fastening pull rod 100 at the galvanic pile module of different power designs is general, make one set of galvanic pile part can satisfy different power demands, match the galvanic pile fastening height of different power demands, be favorable to the cost control of galvanic pile, the power volume ratio and the power quality ratio of low-power galvanic pile have been promoted.
Example 2
As shown in fig. 14 to 15, based on the same inventive concept, the present embodiment provides a fuel cell stack 200 including a stack body, a fastening assembly, and a core equivalent 260, wherein: the stack body comprises a blind end plate assembly 210, a blind end current collecting plate 220, a reactor core 230, an air inlet end current collecting plate 240 and an air inlet end plate 250 which are sequentially arranged along the stacking direction; the fastening assembly comprises at least two fastening pull rods 100, the near ends of the first pull rod 110 and the second pull rod 120 of the fastening pull rod 100 are detachably connected, and the far ends of the first pull rod and the second pull rod are respectively connected with the dead end plate assembly 210 and the air inlet end plate 250, so that the pile height requirements of different power requirements are met, and the fastening height of the pile of different power requirements is met. Because the length of fastening pull rod 100 is adjusted limitedly, can't realize the regulation of many gears, reactor core equivalent 260 presss from both sides and locates in the reactor core, and be located at least one side that reactor core 230 is along the direction of piling up to the height of fuel cell stack 200 is adjusted to the cooperation fastening assembly, and the thickness of reactor core equivalent 260 chooses for use according to the power demand in the pressure equipment in-process, can greatly improve the universalization rate of part, reduces the cost of stack, is favorable to promoting the power volume ratio and the power mass ratio of low-power stack.
The fuel cell stack 200 provided by the present embodiment can be applied to assembly production of fuel cell stacks 200 with different powers, different numbers of single cells and different heights by preset adjustable length gears in the case of the fastening tie rod 100 of embodiment 1. However, when the length adjustment of the fastening tie rod 100 is realized by using the positioning structure, the adjustable length of the fastening tie rod 100 only has a fixed preset length, so that the adjustable length can only be applied to the assembly of a certain power stack body corresponding to the height matched with the preset length of the fastening tie rod 100. In order to further meet the production of fuel cell stacks 200 with various height requirements and power requirements, the reactor core equivalent body 260 which is in coaction with the fastening pull rod 100 is added into the fuel cell stack 200, so that the fastening pull rod 100 with a certain preset length can fasten and press stack bodies with different power requirements, the generalization rate of parts is greatly improved, and the cost of the stack is reduced.
The specific structure and the setting position of the reactor core equivalent 260 are not specifically limited in this embodiment, the reactor core equivalent 260 can be an integral structure or a split structure, and the total thickness of the reactor core equivalent 260 can meet the height adjustment requirements of the electric reactors with different powers so as to be matched with the fastening pull rod 100 to realize height adjustment.
The number of the fastening rods 100 in the fastening assembly and the distribution position of the fastening rods 100 are not particularly limited in this embodiment, the number of the fastening rods 100 may be selected according to the fastening requirements of the fuel cell stacks with different powers, and the fastening rods 100 are distributed at least on two opposite sides of the fuel cell stack 200, preferably at least on two long sides of the stack, so as to satisfy most of the fastening and sealing requirements.
To better ensure fastening and press-fit sealing of the fuel cell stack 200, in some embodiments, the fastening assembly includes at least four fastening units distributed on the long side of the stack body.
In some embodiments, the fastening assembly may further include steel belts disposed at both ends of the long side of the stack body, and specifically, the steel belts may be selectively disposed at the long side and/or the short side of the inlet end plate 250 and the blind end plate assembly 210 according to actual fastening requirements to assist fastening, and fastening forces of different magnitudes may be provided at the middle of the stack and the end plates by different fastening schemes to adapt to deformation and stress at different positions, so as to equalize stress conditions of the reaction zone as much as possible, and effectively ensure the optimal performance of the core 230.
In order to control the volumetric power ratio of the fuel cell stack 200 while ensuring the securement of the fastening assembly, in some embodiments, mounting locations are provided on the sides of the inlet end plate 250 and the blind end plate assembly 210 that receive the ends of the fastening assembly.
The molding design of the mounting position is not particularly limited in this embodiment, and in some embodiments, the mounting position may be a sunken groove matching the shape of the end plate connecting portion 161. In some embodiments, the end surface of the inlet end plate 250/disc spring support plate is a stepped surface, the stepped surface of the stepped surface constitutes a mounting location, and the side surface of the inlet end plate 250/blind end plate assembly 210 is provided with a through hole for the body connecting portion 162 to pass through.
The present embodiment is not limited to the connection of the end plate connection portion 161 to the corresponding inlet end plate 250/blind end plate assembly 210, and in some embodiments, the end plate connection portion 161 may be connected to the inlet end plate 250 or blind end plate assembly 210 by a connection member having a projection component of the stacking direction. In some embodiments, the end plate connection 161 may also be connected to the inlet end plate 250 or the blind end plate assembly 210 by a connection perpendicular to the stack stacking direction.
The specific structure of the core equivalent 260 is not limited in this embodiment, and the core equivalent 260 may include at least one equivalent, that is, in some embodiments, the core equivalent 260 may be an integral part, in some embodiments, the core equivalent 260 may also be composed of a plurality of single parts, and more than two single parts may be continuously stacked, or may be arranged at intervals, or may be partially continuously stacked, or partially stacked at intervals.
The setting position and performance of the core equivalent 260 are not specifically limited in this embodiment, and when the core equivalent 260 includes two or more equivalent parts, the equivalent parts may be the same or different, and may also be used in combination, and the equivalent parts may be continuously or intermittently arranged, and may also be distributed on different sides of the core 230, and may specifically be adjusted according to actual requirements.
In some embodiments, in order to satisfy the universality of high-power and low-power components as much as possible and avoid the change of the position of the current collecting plate assembly of the fuel cell stack 200, the length of the copper bar and the positions of the high-low voltage output terminals, the equivalent component is a conductive component, and the shape of the equivalent component is matched with that of the bipolar plate of the reactor core 230, and the equivalent component is arranged on one side of the air inlet current collecting plate and/or the blind end current collecting plate 220 close to the reactor core 230, so as to adjust the height of the fuel cell stack 200 and ensure that the positions of the copper bar and the current collecting plate and the positions of the high-low voltage output terminals are substantially unchanged, so that the subsequent assembly can be completed by using the high-voltage copper bar with the original length.
The structure of the conductive equivalent component is not specifically limited in this embodiment as long as the requirements of conductivity and stack performance are met, and in some embodiments, the equivalent component includes a bipolar plate equivalent and/or a membrane electrode equivalent, it should be noted that the bipolar plate equivalent and the membrane electrode equivalent are mainly shape structures simulating the bipolar plate and the membrane electrode, but do not have a structure participating in the electrochemical reaction of the battery, for example, two media flow channels of the bipolar plate equivalent are not communicated, and are only used for communicating the core 230 and the current collecting plate assembly for transmission. The conductive piece can be made of metal plate or graphite paper.
When the equivalent component is a conductive component, such as a metal bipolar plate, or graphite. Preferably, the equivalent pieces conform to the outer shape of the bipolar plate and the thickness of the single equivalent piece is fixed.
In some embodiments, the equivalent part may also be an insulating part, the equivalent part is disposed on a side of the inlet collector plate and/or the blind-end collector plate 220 away from the core 230, the core equivalent body 260 made of an insulating material will sacrifice the generalization of the copper bars, and the copper bars with different lengths need to be designed correspondingly when the positions of the pile collector plates with different powers are different. But the density of the insulating material is generally lower than that of the conductive material, and the weight reduction effect is more obvious.
It should be noted that, in the fuel cell stack 200 provided in this embodiment, the same as the prior art may further include a separate insulating plate assembly in some embodiments, and in some embodiments, it may also be considered that the inlet end plate and/or the blind end plate assembly is designed as an aluminum-plastic integrated structure, that is, the inlet end plate and/or the blind end plate assembly is integrated with the insulating plate, and when the equivalent is an insulating member, the equivalent is disposed between the end plate on at least one side of the core and the current collecting plate, and at this time, the equivalent may also be used as the insulating plate assembly.
Since the order of the inlet end to the blind end is generally adopted in the stack assembly of the fuel cell stack 200, the core equivalent 260 is preferably provided on the blind end side of the core 230 in order to achieve the operability of the assembly and the convenience of subsequent adjustment.
In order to ensure the overall sealing performance of the fuel cell stack 200 and the performance of the electrochemical reaction, in some embodiments, the core equivalent 260 includes at least two equivalent parts, and a sealing ring is disposed between two adjacent equivalent parts and between the equivalent parts and the stack body, for example, when more than two conductive equivalent parts are disposed between the current collecting plate and the core 230, a sealing member, a bipolar plate equivalent, a sealing member, a membrane electrode equivalent, a sealing member, and a bipolar plate equivalent … … may be sequentially stacked in combination.
In some embodiments, in order to achieve adaptation to different heights of the stack in cooperation with the fastening tie rods 100, the thickness of the core equivalent 260 is theoretically an integer multiple of the thickness of the single cells of the core 230 under the application of the fastening force by the fastening assembly.
In some embodiments, to meet the requirement of lightweight design, at least one equivalent piece is provided with lightening holes, i.e. the equivalent piece can be provided as a frame structure matching the shape of the core 230.
The fuel cell stack 200 provided by the embodiment can be adapted to the housing of the fuel cell stack 200 in different power ranges by combining the gear length adjustment of the fastening tie rod 100 and the thickness of the core equivalent 260. Such as: the fastening pull rod 100 of the 50 kW-70 kW electric pile is in a low gear, the reactor core equivalent bodies 260 with different thicknesses are added, and a low-power shell is shared; the 100-gear fastening pull rod of the 70kW to 100kW electric pile is a middle gear, and core equivalent bodies 260 with different thicknesses are added to share a high-power shell. The low power stack housing may also follow the high power stack design, but with a resulting reduction in the power volume ratio and power mass ratio of the low power stack.
The fuel cell stack 200 provided by the embodiment effectively replaces part of the reactor core 230 in height through the reactor core equivalent body 260, is matched with the two-section assembled fastening pull rod 100 with adjustable length, is adapted to the fuel cell stacks 200 with different power requirements, can greatly improve the generalization rate of parts, reduces the cost of the stacks, and improves the power volume ratio and the power mass ratio of the low-power stacks.
Example 3
Based on the same inventive concept, the present embodiment provides a fuel cell module, which includes at least one fuel cell stack 200 provided in embodiment 2, as shown in fig. 16, that is, the fuel cell module may be a single stack solution or a multi-stack integrated solution.
For example, in some embodiments, to enclose the fuel cell stack 200, the fuel cell module includes a housing having a mounting cavity, and the fuel cell stack 200 is enclosed within the mounting cavity of the housing. For example, in some embodiments, the high-voltage component and the low-voltage component (such as the air distribution component and the voltage inspection device) are further included to output current outwards. The specific structure of the fuel cell module other than the fuel cell stack 200 is not modified in this embodiment, so the structure of the fuel cell module without modification in this embodiment can refer to the prior art, and the specific content thereof will not be described herein.
Example 4
As shown in fig. 17, based on the same inventive concept, the present embodiment provides a vehicle including the fuel cell module of embodiment 3, and details thereof are not repeated herein. The invention does not specifically limit the types and types of vehicles, and can be any vehicle in the prior art, such as a household trolley, a passenger car, a truck and the like.
In order to cooperate with the fuel cell module, the vehicle further comprises a fuel cell auxiliary system, and the fuel cell module and the fuel cell auxiliary system form a fuel cell system together, and the fuel cell system can normally work under the condition of an external fuel supply source.
The fuel cell auxiliary system comprises an air supply subsystem, a fuel supply subsystem, a thermal management subsystem and an automatic control system, wherein the air supply subsystem is used for supplying air to each electric pile of the fuel cell module and selectively processing the air in aspects of filtration, humidification, pressure regulation and the like; the fuel supply subsystem is used for supplying fuel to each cell stack of the fuel cell module, and selectively carrying out humidification, pressure regulation and other aspects on the fuel so as to convert the fuel into fuel gas suitable for running in the fuel cell stack, and taking hydrogen as fuel, the fuel supply subsystem is communicated with a hydrogen inlet and a hydrogen outlet of each cell stack of the fuel cell module; and the heat management subsystem is communicated with each electric pile of the fuel cell module to provide cooling liquid to cool and/or heat the electric pile and recover and treat the water generated by the electric pile.
The automatic control system is electrically connected with the fuel cell module, the air supply subsystem, the fuel supply subsystem and the heat management subsystem respectively, and is an assembly comprising a sensor, an actuator, a valve, a switch and a control logic component, so that the fuel cell system can work normally without manual interference. In other embodiments, the fuel cell auxiliary system may further include a ventilation system for mechanically exhausting the gas inside the cabinet of the fuel cell system to the outside. In the present embodiment, the fuel cell auxiliary system in the fuel cell system is not modified, so that reference may be made to the related disclosure of the prior art for more details, which will not be described herein.
Secondly, the vehicle also comprises a DC/DC converter, a driving motor and a motor controller thereof, and a vehicle-mounted energy storage device, so as to form a fuel cell power system together with the fuel cell system.
The DC/DC converter is electrically connected with each electric pile of the fuel cell system to realize voltage conversion, and the voltage generated by each electric pile is output to high-voltage devices such as a driving motor, an automobile air conditioner compressor and the like and storage devices such as a battery and the like after being regulated. The driving motor is electrically connected with the DC/DC converter and is used for providing torque required by vehicle running; the motor controller is electrically connected with the driving motor to control the starting, stopping, torque output and the like of the driving motor, is connected with the whole vehicle controller to receive driving signals sent by the whole vehicle controller, and can also be selectively electrically connected with an automatic control system of the fuel cell system. The vehicle-mounted energy storage device is used for storing electric energy to supply power to other electronic equipment in the vehicle, and is electrically connected with the DC/DC converter, for example, the vehicle-mounted energy storage device is a storage battery.
In the present embodiment, the DC/DC converter, the driving motor and its motor controller, and the vehicle-mounted energy storage device in the fuel cell power system are not modified, so that reference may be made to the related disclosure of the prior art for more details, and the description thereof is omitted here.
In addition, the vehicle needs to include a transmission system that transmits torque to drive the electric motor to rotate the drive wheels, and a fuel storage device for storing fuel that acts like a fuel tank in a fuel-powered vehicle that communicates with a fuel supply subsystem of the fuel cell system via a conduit.
Thus, the vehicle may be a hydrogen energy vehicle or a hydrogen energy + charged hybrid electric vehicle. Since the specific structure of the vehicle is not improved in the embodiment, the structure of the vehicle where no change is made in the embodiment can refer to the prior art, and the specific content is not described herein. Thus, the vehicle has all of the features and advantages previously described for the fuel cell module and will not be described in detail herein.
Through the above embodiment, the present application has the following beneficial effects or advantages:
the fastening pull rod 100 is of a structure with adjustable length, the optional fastening length of the fastening pull rod 100 is determined by setting the adjusting gear of the fastening pull rod 100, the fastening lengths of different gears correspond to different heights of the electric piles, and also correspond to different numbers of the single cells of the reactor core 230, so that the fastening universality of the fastening pull rod 100 on the electric pile modules with different power designs can be realized corresponding to different electric pile powers, a set of electric pile parts can meet different power requirements and match the electric pile fastening heights with different power requirements, the cost control of the electric pile is facilitated, and the power volume ratio and the power mass ratio of the low-power electric pile are improved.
According to the fuel cell stack 200 provided by the invention, the fastening pull rod 100 and the reactor core equivalent 260 which are mutually matched can greatly improve the generalization rate of parts, reduce the cost of the stack and be beneficial to improving the power volume ratio and the power mass ratio of the low-power stack.
The fuel cell module and the vehicle provided by the invention both comprise the fuel cell stack 200, in order to meet the universality of parts as much as possible and enable one set of stack parts to meet different power requirements, the fastening pull rod 100 is set to be of a pull rod structure with adjustable length, the stack fastening heights with different power requirements are matched, the increase of the stack fastening height adjusting gear is realized by matching with the reactor core equivalent body 260, and the application range of the stack power is expanded.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (19)
1. A fastening pull rod is used for connecting a dead end plate assembly and an air inlet end plate of a fuel cell and is characterized in that the fastening pull rod is of a structure with adjustable length and comprises a first pull rod and a second pull rod, and the first pull rod and the second pull rod are at least partially overlapped and detachably connected.
2. The fastening pull rod of claim 1, wherein the first pull rod and the second pull rod are connected in a positioning manner through a positioning structure, and the first pull rod and/or the second pull rod are/is provided with at least two connecting positions for mounting the positioning structure; the at least two connecting positions are arranged at intervals along the length direction of the first pull rod/the second pull rod.
3. The fastening pull rod of claim 2, wherein the first pull rod and the second pull rod are provided with positioning holes; and/or the first pull rod and the second pull rod are provided with a positioning table and a positioning hole which are matched with each other;
the positioning structure is a positioning pin and/or the positioning table; the positioning hole forms the connecting position, and the positioning table/the positioning pin is arranged in the positioning hole.
4. The fastening tie of any one of claims 1 to 3, wherein the first tie and the second tie each comprise a tie body and a connecting portion connected to one end of the tie body; the connecting part comprises an end plate connecting part used for connecting an end plate and a body connecting part used for connecting the pull rod body, and the body connecting part and the pull rod body are arranged at an angle.
5. The fastening drawbar of claim 4, wherein the drawbar body includes a connecting limiting portion and an abutting portion, the body connecting portion is connected to the limiting portion, and the connecting portion is disposed at the abutting portion.
6. The tie rod of claim 5, wherein the abutment portion of the first tie rod is a flat plate; the butt joint part of the second pull rod is a plate with an L-shaped cross section, and the butt joint part of the first pull rod is arranged in an L-shaped groove of the L-shaped plate.
7. The fastening pull rod of claim 6, wherein the limiting portion of the first pull rod is identical in structure to the limiting portion of the second pull rod; the width of the limiting part is the same as that of the butt joint part of the second pull rod; the thickness of the limiting part is the same as that of the butt joint part of the second pull rod;
the cross section size of the butt joint part of the first pull rod is matched with the L-shaped groove of the butt joint part of the first pull rod.
8. The fastening tie of any one of claims 2 to 7, further comprising an insulating support; and the fastening pull rod and/or the insulating support piece are/is provided with a limiting structure.
9. The fastening tie of claim 8, wherein the insulating support has a countersink for receiving the fastening tie; a limiting hole is formed in the groove surface of the sinking groove;
the positioning table/positioning pin of the fastening pull rod and the limiting hole form the limiting structure; and/or a limiting table matched with the limiting hole is arranged on the lower surface of one of the first pull rod and the second pull rod, which is closer to the insulating support piece, and the limiting table and the limiting hole form the limiting structure.
10. A fuel cell stack, comprising,
the reactor body comprises a blind end plate assembly, a blind end collector plate, a reactor core, an air inlet end collector plate and an air inlet end plate which are sequentially arranged along the stacking direction;
a fastening assembly comprising at least two fastening tie rods of any one of claims 1-9, the first and second tie rods of the fastening tie rods connecting the blind end plate assembly and the intake end plate, respectively;
and the core equivalent body is clamped in the stack body and positioned on at least one side of the core along the stacking direction so as to match the fastening assembly to adjust the height of the fuel cell stack.
11. The fuel cell stack of claim 10 wherein the core equivalent comprises at least one equivalent.
12. The fuel cell stack of claim 11 wherein the equivalent member is an electrically conductive member and is shaped to match the bipolar plate of the core, the equivalent member being disposed on a side of the inlet collector plate and/or the dead-end collector plate adjacent to the core.
13. The fuel cell stack according to claim 12, wherein the equivalent comprises a bipolar plate equivalent and/or a membrane electrode equivalent.
14. The fuel cell stack according to claim 11, wherein the equivalent member is an insulator, and the equivalent member is provided on a side of the inlet collector plate and/or the blind-end collector plate remote from the core.
15. The fuel cell stack according to any one of claims 11-14 wherein said core equivalent comprises at least two equivalent pieces, and sealing rings are provided between two adjacent equivalent pieces and between said equivalent pieces and said stack.
16. The fuel cell stack according to any one of claims 10 to 14, wherein the thickness of the core equivalent is an integral multiple of the thickness of the unit cells of the core under the condition that the fastening force is applied by the fastening assembly.
17. The fuel cell stack according to any one of claims 10-14, wherein at least one of said equivalent members is provided with lightening holes.
18. A fuel cell module characterized by: comprising a fuel cell stack according to any of claims 10-17.
19. A vehicle, characterized in that: comprises that
The fuel cell stack of claims 10-17;
alternatively, a fuel cell module according to claim 18 is included.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210862225.2A CN115411333A (en) | 2022-07-20 | 2022-07-20 | Fastening pull rod, fuel cell stack, fuel cell module and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210862225.2A CN115411333A (en) | 2022-07-20 | 2022-07-20 | Fastening pull rod, fuel cell stack, fuel cell module and vehicle |
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| CN115411333A true CN115411333A (en) | 2022-11-29 |
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| CN202210862225.2A Pending CN115411333A (en) | 2022-07-20 | 2022-07-20 | Fastening pull rod, fuel cell stack, fuel cell module and vehicle |
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