CN112117478A - Pressure connection assembly, pressure device, self-pressurizing cell stack and cell stack self-pressurizing method - Google Patents
Pressure connection assembly, pressure device, self-pressurizing cell stack and cell stack self-pressurizing method Download PDFInfo
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- CN112117478A CN112117478A CN202010565583.8A CN202010565583A CN112117478A CN 112117478 A CN112117478 A CN 112117478A CN 202010565583 A CN202010565583 A CN 202010565583A CN 112117478 A CN112117478 A CN 112117478A
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- 238000000034 method Methods 0.000 title claims description 7
- 210000004027 cell Anatomy 0.000 claims description 73
- 238000009826 distribution Methods 0.000 claims description 68
- 239000001257 hydrogen Substances 0.000 claims description 31
- 229910052739 hydrogen Inorganic materials 0.000 claims description 31
- 150000002431 hydrogen Chemical class 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 2
- 210000005056 cell body Anatomy 0.000 claims 1
- 238000003825 pressing Methods 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000007789 gas Substances 0.000 description 10
- 230000000712 assembly Effects 0.000 description 8
- 238000000429 assembly Methods 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000007789 sealing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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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
- H01M8/248—Means for compression of the fuel cell stacks
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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
- H01M8/2484—Details of groupings of fuel cells characterised by external manifolds
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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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- General Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a pressurizing connecting assembly, which comprises a first connecting rod, a second connecting rod and a fastener, wherein the fastener is arranged on the first connecting rod, the end part of the first connecting rod extends into a groove formed in the end part of the second connecting rod for fixing, and the thermal expansion coefficient of the first connecting rod is greater than that of the second connecting rod.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a pressurizing connecting assembly, a pressurizing device, a self-pressurizing battery stack and a battery stack self-pressurizing method.
Background
The conventional SOFC cell stack is not provided with a high-temperature self-tightening pressurizing device, because the conventional cell stack is formed by stacking single cells of a ceramic substrate and a runner plate made of a metal material, the thermal expansion coefficient of the whole cell stack is smaller than that of various common high-temperature-resistant metal materials, and steel materials with the thermal expansion coefficient smaller than or similar to that of the cell stack are not high-temperature-resistant, so that after the conventional self-tightening pressurizing device is pressurized in a cold state, the high-temperature-resistant materials are loosened due to high thermal expansion coefficient at high temperature, and are damaged and loosened due to tensile deformation of the non-high-temperature-resistant materials, and the requirement of the high-temperature self-tightening of the cell stack is difficult.
In view of the above, external pressurizing devices are generally used to pressurize the cell stack to meet the pressure required to be maintained during high-temperature operation of the cell stack, and the external pressurizing devices are troublesome to use and need to be improved.
Disclosure of Invention
In order to solve the above technical drawbacks, a first aspect of the present invention provides a compression connecting assembly, which includes a first connecting rod, a second connecting rod, and a fastening member, wherein the fastening member is disposed on the first connecting rod, an end of the first connecting rod extends into a groove formed in an end of the second connecting rod for fixing, and a thermal expansion coefficient of the first connecting rod is greater than a thermal expansion coefficient of the second connecting rod.
Under above-mentioned structure, when the pressure coupling assembling is heated, the thermal expansion volume of first connecting rod is greater than the thermal expansion volume of second connecting rod to strengthen the first connecting rod and the fastening degree of being connected of second connecting rod.
The first connecting rod and the second connecting rod are fixed in a fixing mode, wherein the fixing mode comprises embedding fixing, welding fixing and the like.
Preferably, the outer wall of the end part of the first connecting rod is provided with threads, the inner wall of the groove at the end part of the second connecting rod is correspondingly provided with matched threads, and the first connecting rod and the second connecting rod are in threaded connection and are more convenient to butt.
Furthermore, the fastener sleeve is on the head rod and threaded connection, if the fastener chooses the nut for use, conveniently adjusts the fastener position to adjust clamping pressure size.
The second aspect of the present invention provides a pressing device, which includes the above-mentioned pressing connection assembly, and further includes a pressing plate, wherein the second connecting rod is located between the two pressing plates, and the first connecting rod passes through the hole formed in the pressing plate and then is fixed to the second connecting rod, and the position of the fastening member is adjusted on the first connecting rod, so as to adjust the position of the pressing plate.
The pressurizing plate is additionally arranged on the basis of the pressurizing connecting assembly, so that objects to be pressurized, such as a battery stack, can be clamped more conveniently, and the position of the fastener on the first connecting rod is adjusted, so that the gap between the pressurizing plates is adjusted, and the pressure applied to the objects to be pressurized is adjusted.
Furthermore, pressure device includes four sets of pressurization coupling assembling, is located the increased pressure board four corners position respectively, and it is more even to apply pressure, and stability is good.
Of course, three sets of pressurizing connecting components can be selected to form triangular pressurizing.
The invention provides a self-pressurizing cell stack, which comprises the pressurizing device and a cell stack main body, wherein the cell stack main body is positioned between the two pressurizing plates, the top end and the bottom end of the cell stack main body are respectively abutted against the pressurizing plates, and the thermal expansion coefficient of a pressurizing connecting assembly in the pressurizing device is smaller than that of the cell stack.
The cell stack is pressurized by the pressurizing device, the cell stack is clamped between the two pressurizing plates, and under the condition that the thermal expansion coefficient of the pressurizing connecting assembly is smaller than that of the cell stack, the cell stack is heated to work, and the thermal expansion amount is larger than that of the pressurizing connecting assembly, so that the pressure applied to the cell stack is increased, a self-pressurizing mode is formed, the operation is stable, no pressurizing equipment is required to be arranged outside, and the self-pressurizing cell stack can be used after being connected with a power circuit.
In addition, the first connecting rod and the second connecting rod are made of two materials, so that the thermal expansion coefficient of the pressurizing connecting component is easier to adjust.
Further, the cell stack main part includes casing and inside electric pile, and flat tubular battery cell and runner plate pile up in proper order and constitute the electric pile, includes two parallel connection's electric pile in the casing, and two electric piles set up side by side, are favorable to doing the battery pile greatly, and reduce the heat radiating area of battery pile.
Further, still including leading electrical pillar, the top and the bottom of casing lid are the current conducting plate, set up the insulation board between current conducting plate and the increased pressure board, and the current conducting plate of top and bottom butt respectively is in order to connect two galvanic piles side by side the upper and lower tip of galvanic pile, leads the electrical pillar tip and passes in proper order behind the clamp plate to be connected with the current conducting plate.
In this scheme, increase and lead electrical pillar structure, and improve shell structure to the lid of the top of casing, bottom is constituteed to the current conducting plate, and the pile is parallelly connected side by side simultaneously, is connected with the current conducting plate with leading electrical pillar, and this battery pile only needs to lead electrical pillar and power supply line to be connected and can use, further improves the convenience of using.
Furthermore, the lateral wall of casing is split type structure, including left lid, right lid, protecgulum, hou gai, its upper and lower tip is fixed with the current conducting plate of casing top, bottom respectively, and easily assembly moulding reduces the casing shaping degree of difficulty.
Further, in the side walls of four sides of the shell, the inner cavity wall of one of the two opposite side walls is provided with an air distribution cavity, the air distribution cavity is internally provided with an air distribution pipe, one end of the air distribution pipe extends out from the bottom end of the shell, and an air cover insulating plate and a frame shape are arranged between the side wall of the air distribution cavity and the galvanic pile;
the inner cavity wall of the other two opposite side walls is provided with a hydrogen distribution cavity, a hydrogen distribution pipe is arranged in the hydrogen distribution cavity, one end of the hydrogen distribution pipe extends out of the bottom end of the shell, and a hydrogen cover insulating plate and a frame shape are arranged between the side wall where the hydrogen distribution cavity is positioned and the galvanic pile.
The utility model has the advantages of gas transmission at the bottom end and convenient use.
Furthermore, a longitudinal plate is arranged in the frame of the hydrogen cover insulating plate corresponding to the gap between the two galvanic piles, so that the longitudinal plate seals the gap between the galvanic piles, and the sealing performance is good.
Furthermore, the two sides of the air distribution pipe in the frame are provided with holes, the hydrogen distribution cavity is internally provided with a gas distribution block, the groove body and the groove walls on the two sides are provided with a plurality of holes, the end part of the hydrogen distribution pipe is connected with the gas distribution block, and the air or hydrogen is distributed more uniformly by the hole distribution.
Furthermore, 20 single batteries and matched runner plates are sequentially stacked to form the galvanic pile, the second connecting rod is made of a stainless iron material resistant to 900 ℃, the first connecting rod is made of a stainless steel material resistant to 1000-1350 ℃, and the end part of the first connecting rod extends into the end groove of the second connecting rod, is in threaded connection and is welded and fixed.
In the scheme, the galvanic pile has a 20-layer structure, the second connecting rod is made of stainless iron resistant to 900 ℃, and the first connecting rod is made of stainless steel resistant to 1000-1350 ℃, so that the self-tightening pressure of the galvanic pile can be effectively maintained, and the operation is stable.
The invention provides a method for self-pressurizing a cell stack, which comprises forming a cell stack, arranging pressurizing plates at the top and bottom ends of the cell stack, connecting the two pressurizing plates by a pressurizing connecting assembly consisting of the first connecting rod, the second connecting rod and a fastener, so as to clamp the cell stack between the pressurizing plates, wherein the thermal expansion coefficient of the first connecting rod is greater than that of the second connecting rod, and the thermal expansion coefficient of the pressurizing connecting assembly is less than that of the cell stack.
The materials of the first connecting rod and the second connecting rod are adjusted to match with the pressurizing plate to effectively provide the self-tightening pressure required by the cell stack, so that the formed cell stack is more convenient to use.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
1. the invention provides a pressurizing connecting component and a pressurizing device, which can effectively improve the tightness of the connecting component when heated by adjusting the material and the fixed position relation of a first connecting rod and a second connecting rod, thereby stabilizing the clamping pressure between pressurizing plates.
2. The invention provides a self-pressurizing battery pile and a self-pressurizing method, wherein the battery pile is connected in parallel, the self-tightening pressure required by the battery pile is provided by utilizing the heat dissipated when the battery pile works and matching with a pressurizing device, and the use is convenient.
3. The self-pressurizing battery stack provided by the invention has the advantages that the shell structure is improved, the conductive columns are additionally arranged to form an external power line, and the use convenience is further improved.
4. The self-pressurizing cell stack provided by the invention has the advantages that the structure of the gas distribution cavity is improved, and the gas distribution is more uniform.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a cross-sectional view of a compression connection assembly of the present invention;
FIG. 2 is a block diagram of the pressurizing device of the present invention;
fig. 3 is a top view structural view of the self-pressurizing cell stack of the present invention;
fig. 4 is a cross-sectional structural view of a self-pressurizing cell stack of the present invention;
fig. 5 is an exploded view of the self-pressurizing cell stack of the present invention;
FIG. 6 is a diagram of a hydrogen chamber configuration;
FIG. 7 is a view showing the structure of an air chamber;
fig. 8 is a view showing a stack structure of a unit cell and a flow field plate;
FIG. 9 is a view showing the structure of a flow field plate;
wherein the reference numerals are:
1. a first connecting rod; 2. a second connecting rod; 3. a fastener; 4. a pressurizing plate; 5. a cell stack body; 6. a side wall; 7. a conductive plate; 8. a galvanic pile; 9. an insulating plate; 10. a conductive post; 61. a left cover; 62. a right cover; 63. a front cover; 64. a rear cover; 65. a gas distribution block; 66. a hydrogen cover insulating plate; 67. a hydrogen gas distribution pipe; 68. an air cap insulating plate; 69. an air distribution pipe; 81. a single battery; 82. a runner plate.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Pressure connecting assembly, pressure device and self-pressure cell stack structure
Example 1
Referring to fig. 1, the present embodiment provides a compression connecting assembly, which includes a first connecting rod 1, a second connecting rod 2 and a fastener 3, wherein the combination relationship is as follows: the fastener is arranged on the first connecting rod, such as a nut, a pressure plate and the like; the end of the first connecting rod extends into the groove formed in the end of the second connecting rod for fixing, such as embedding, welding, bolt fixing, etc., in this embodiment, the thermal expansion coefficient of the first connecting rod is greater than that of the second connecting rod, for example, the first connecting rod is made of stainless steel materials which are resistant to 1000 ℃ -1350 ℃, the second connecting rod is made of common stainless iron which is resistant to 900 ℃, and of course, other materials meeting the requirements can be selected for preparing the first connecting rod and the second connecting rod according to actual conditions.
As preferred, the screw rod is selected for use to the head rod, and pole outer wall screw thread, fastener select for use the nut, overlaps on the head rod, and the fluting of second connecting rod both ends, matched with internal thread are opened to the cell wall, and the head rod is connected to second connecting rod both ends threaded connection, and during the use, if through the object of two nut fastening centre gripping between, or with two boards of pressurization coupling assembling connection, the object centre gripping is between the board, through the nut to the board pressurization.
Under above-mentioned structure, when the pressure coupling assembling is heated, the thermal expansion volume of first connecting rod is greater than the thermal expansion volume of second connecting rod to strengthen the first connecting rod and the fastening degree of being connected of second connecting rod.
Example 2
Referring to fig. 1 and 2, the present embodiment provides a pressing device, which includes the pressing connection assembly described in embodiment 1, and further includes a pressing plate 4, wherein the second connection rod 2 is located between the two pressing plates, specifically, the first connection rod 1 is fixed to the second connection rod after passing through a hole formed in the pressing plate, and the position of the fastening member 3 is adjusted on the first connection rod, so as to adjust the position of the pressing plate.
In this embodiment, preferably, the four corners of the pressure plate are respectively provided with the pressure connection assemblies, and the pressure connection assemblies are matched with the pressure plate to clamp and fix the object in the enclosed cavity, but it is also possible to selectively select three sets of pressure connection assemblies, which are arranged in a triangle, or two sets of pressure connection assemblies and 1 set of pressure connection assemblies according to the actual situation of the clamped object.
Preferably, in the pressurizing device, the first connecting rod and the second connecting rod are preferably in threaded connection, and the fastening piece is a nut and is sleeved on the first connecting rod.
When the device is used, the position of the fastener on the first connecting rod is adjusted, so that the gap between the pressurizing plates is adjusted, the pressure applied to an object to be pressurized is adjusted, and the device is more convenient to use.
Example 3
Referring to fig. 1, 2 and 3, in the present embodiment, a self-pressurizing cell stack is provided, in which a pressurizing device described in embodiment 2 is used to clamp and fix a cell stack main body 5 to provide a pressure required by the cell stack, specifically, four sets of pressurizing connection assemblies are selected for the pressurizing device, four corners of the pressurizing plates are installed, the cell stack main body 5 is located in a cavity surrounded by two pressurizing plates 4 and the pressurizing connection assemblies, the top end and the bottom end of the cell stack main body are respectively abutted to the pressurizing plates 4, and in addition, the thermal expansion coefficient of the pressurizing connection assemblies in the pressurizing device is smaller than that of the cell stack.
Under the above-mentioned structure, the operation is heated up to the battery pile, and thermal expansion is greater than the thermal expansion volume of pressurization coupling assembling, therefore the pressure that the battery pile received increases, forms from the pressurization mode, and the operation is stable, need not peripheral hardware pressurization equipment.
In addition, the first connecting rod, the second connecting rod are two kinds of materials preparation, change the coefficient of thermal expansion of adjustment pressurization coupling assembling, in addition, as shown in fig. 3, the length of first connecting rod is less than the second connecting rod in this embodiment, also can be according to required pressure certainly, according to thermal expansion volume, the length of free adjustment first connecting rod, second connecting rod.
In addition, conventional SOFC solid fuel cell pile is single pile structure usually, realize the series-parallel connection of pile and need design external circuit in addition, it is more loaded down with trivial details, to this, this embodiment is optimized, refer to fig. 4, fig. 5, the pile main part includes casing and inside pile 8, pile up the pile in proper order with flat tubular cell and runner plate, set up two parallel connection's pile in the casing, two piles set up side by side, two piles are directly parallelly connected, purchase the back, connect the power cord, need not outer pressure equipment and can directly move, high durability and convenient use, in addition parallel pile is favorable to making the pile big, and reduce the heat radiating area of pile.
Here, the structure of the stack is described with reference to fig. 8 and 9, the stack is formed by stacking flat-tube type single cells 81 and a runner plate 82 in sequence, the single cells are flat plates, a plurality of tube cavities are formed in the plate body, and a hydrogen gas distribution cavity is formed in the wall of the shell cavity corresponding to the tube openings, as shown in fig. 5 and 6, a hydrogen gas distribution tube 67 is arranged in the hydrogen gas distribution cavity, one end of the hydrogen gas distribution tube extends out from the bottom end of the shell, a hydrogen cover insulating plate 66 is arranged between the side wall of the hydrogen gas distribution cavity and the stack, and the stack is frame-shaped and effectively sealed.
Referring to fig. 9, a plurality of channels are arranged on the plate body of the runner plate, and air distribution chambers are opened on the chamber walls of the other two sides of the housing facing the channel openings, as shown in fig. 5 and 7, air distribution pipes 69 are arranged in the chambers, one end of each air distribution pipe extends out from the bottom end of the housing, and an air cover insulating plate 68 is arranged between the side wall where the air distribution chamber is located and the galvanic pile, so that the structure is a frame.
In addition, in a further optimization, holes are formed in two sides of the air distribution pipe in the frame, for example, in the extending direction of the air distribution pipe, a plurality of small holes are formed in two sides of the pipe, so that the air is distributed more uniformly, and certainly, a rectangular hole is formed in each of two sides of the air distribution pipe, so that the air flow is large, and the distributed liquid is relatively uniform, as shown in fig. 7; correspondingly, it is preferable that the gas distribution block 65 is fixed in the hydrogen distribution chamber, the groove body is provided with a plurality of holes on the two side groove walls, the end part of the hydrogen distribution pipe is connected with the gas distribution block to divide the flow by the holes, and the hydrogen is uniformly distributed, as shown in fig. 6.
In addition, in order to further improve the sealing performance, a vertical plate is fixed in the frame of the hydrogen cover insulating plate corresponding to the gap between the two cell stacks, referring to fig. 6, the gap between the cell stacks is sealed by the vertical plate, and the sealing performance is good.
In addition, for the purpose of improving convenience, as an optimization, refer to fig. 4 and 5, the power distribution device further includes a conductive column 10, the top end and the bottom end of the casing are configured to be conductive plates 7, an insulating plate 9 is arranged between the conductive plates and the pressurizing plate, the conductive plates at the top end and the bottom end are respectively abutted against the upper end and the lower end of the parallel electric piles to connect the two electric piles, the end of the conductive column sequentially penetrates through the pressurizing plate and then is connected with the conductive plates, the conductive plates are connected with the two electric piles in parallel, the structure is simplified, the conductive column is additionally arranged to be connected with the conductive plates, and when the power distribution device is used.
Preferably, the tail end of the conductive column is directly embedded into the groove formed by the conductive plate, so that the connection is stable.
In addition, on the basis of improving the top end cover body and the bottom end cover body of the shell, the side wall 6 of the shell is preferably changed into a split structure, referring to fig. 5, the shell comprises a left cover 61, a right cover 62, a front cover 63 and a rear cover 64, the upper end and the lower end of the left cover and the right cover are respectively fixed with the conductive plates 7 at the top end and the bottom end of the shell, and the structure is easy to assemble and mold and also reduces the difficulty of molding the shell.
Referring to fig. 3, 5, 6 and 7, in practice, the left cap, the right cap, the front cap and the rear cap are preferably fixed to the conductive plate by fastening bolts. Correspondingly, a hydrogen distribution cavity is directly formed on the wall of the left cover and the wall of the right cover, a hydrogen distribution pipe 67 is arranged on the opening of the cavity bottom wall, the head end of the hydrogen distribution pipe is connected with a gas distribution block 65 fixed in the middle of the cavity, and the tail end of the hydrogen distribution pipe extends out of the cover bottom; meanwhile, air distribution chambers are directly formed in the walls of the front cover and the rear cover, air distribution pipes are arranged in the openings in the bottom wall of the chambers, the tail ends of the air distribution pipes extend out of the cover bottoms, the head ends of the air distribution pipes extend into the chambers, and holes are formed in the two sides of the air distribution pipes.
When the device is assembled, firstly, a pressurizing plate, an insulating plate, a current conducting plate, a single cell, a runner plate and the like are sequentially stacked to form a stack shape, then a pressurizing connecting rod assembly is connected with the pressurizing plate, a nut is screwed on, the pressurizing connecting rod assembly is fastened to required pressure by using a torque wrench, after pressurization is completed, the corresponding parts of the cover bodies of the air distribution cavity and the hydrogen distribution cavity are coated with sealant and then fixed on the upper current conducting plate and the lower current conducting plate of the stack by using screws, the stack is basically formed, and finally, the current conducting columns at the upper end and the lower end of the stack are installed.
Under the structure, 20 single batteries and matched runner plates are preferably stacked in sequence to form the galvanic pile, the second connecting rod is made of a stainless iron material resistant to 900 ℃, the first connecting rod is made of a stainless steel material resistant to 1000-1350 ℃, the end part of the first connecting rod extends into a groove at the end part of the second connecting rod and is in threaded connection and is welded and fixed, and the thermal expansion coefficient of the pressurizing connecting component is smaller than that of the galvanic pile.
After the cell stack is assembled and formed, the temperature can be increased to operate only by connecting a gas pipeline and a power line, and the use condition of the cell stack is simplified.
In practical tests, the structure can effectively maintain the self-tightening pressure of hundreds of kilograms required by the cell stack, and the operation is stable.
Second, a self-pressurization method for battery stack
First, a cell stack is formed, and a conductive plate, a single cell, a flow channel plate, and the like are sequentially stacked in a stack shape.
Then, the pressurizing plate and the insulating plate are respectively arranged at the position of the conductive plate at the top end and the bottom end of the galvanic pile, the pressurizing connecting rod assembly is connected with the pressurizing plate, the pressurizing connecting rod assembly penetrates through the lower pressurizing plate, the pressurizing plates used above sequentially penetrate through the upper end of the pressurizing pull rod assembly, the nut is screwed on, and then the pressurizing pull rod assembly is fastened to the required pressure by using a torque wrench.
After the pressurization is finished, the corresponding parts of the cover body where the air distribution cavity and the hydrogen distribution cavity are located are coated with sealant, then the cover body is fixed on the upper and lower conductive plates of the cell stack by screws, finally, the conductive columns at the upper and lower ends of the cell stack are installed, the thermal expansion coefficient of the first connecting rod is larger than that of the second connecting rod, and the thermal expansion coefficient of the pressurization connecting component is smaller than that of the cell stack.
For example, 20 single batteries and matched runner plates are sequentially stacked to form the galvanic pile, the second connecting rod is made of a stainless iron material resistant to 900 ℃, the first connecting rod is made of a stainless steel material resistant to 1000-1350 ℃, the end part of the first connecting rod extends into a groove at the end part of the second connecting rod and is in threaded connection and is welded and fixed, and the thermal expansion coefficient of the pressurizing connecting component is smaller than that of the galvanic pile.
The temperature of the cell stack rises, the thermal expansion amount of the cell stack is smaller than that of the pressurizing connecting assembly, the first connecting rod and the second connecting rod are high in connection fastness, the first connecting rod and the second connecting rod are matched to effectively provide the required self-tightening pressure of the cell stack, and the formed cell stack is more convenient to use.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (11)
1. Pressurization coupling assembling, its characterized in that: the connecting device comprises a first connecting rod, a second connecting rod and a fastener, wherein the fastener is arranged on the first connecting rod, the end part of the first connecting rod extends into a groove formed in the end part of the second connecting rod for fixing, and the thermal expansion coefficient of the first connecting rod is greater than that of the second connecting rod.
2. The compression connection assembly of claim 1, wherein: the outer wall of the end part of the first connecting rod is provided with threads, and the inner wall of the groove at the end part of the second connecting rod is correspondingly provided with matched threads.
3. Pressure device, including foretell pressurization coupling assembling, its characterized in that: the two compression plates are arranged in parallel, the first connecting rod penetrates through a hole formed in each compression plate and then is fixed with the second connecting rod, and the position of the fastening piece is adjusted on the first connecting rod, so that the position of each compression plate is adjusted.
4. A compression device as claimed in claim 3, wherein: the pressurizing device comprises four sets of pressurizing connecting components which are respectively positioned at four corners of the pressurizing plate.
5. Self-pressurization battery stack, including foretell pressure device, battery stack main part, its characterized in that: the cell stack main body is positioned between the two pressure plates, the top end and the bottom end of the cell stack main body are respectively abutted against the pressure plates, and the thermal expansion coefficient of the pressure connecting assembly in the pressure device is smaller than that of the cell stack.
6. The self-pressurizing stack of claim 5 wherein: the cell stack main part includes casing and inside electric pile, and flat tubular cell and runner plate pile up in proper order and constitute the electric pile, includes two parallel connection's electric pile in the casing, and two electric piles set up side by side.
7. The self-pressurizing stack as recited in claim 6, wherein: still including leading electrical pillar, the top and the bottom of casing lid are the current conducting plate, set up the insulation board between current conducting plate and the increased pressure board, and the current conducting plate of top and bottom butt respectively is in order to connect two galvanic piles side by side the upper and lower tip of galvanic pile, leads the electrical pillar tip and passes the clamp plate in proper order after and be connected with the current conducting plate.
8. The self-pressurizing stack as recited in claim 6, wherein: in the four side walls of the shell, an air distribution cavity is arranged on the inner cavity wall of one of the two opposite side walls, an air distribution pipe is arranged in the air distribution cavity, one end of the air distribution pipe extends out of the bottom end of the shell, and an air cover insulating plate and a frame are arranged between the side wall where the air distribution cavity is located and the galvanic pile;
the inner cavity wall of the other two opposite side walls is provided with a hydrogen distribution cavity, a hydrogen distribution pipe is arranged in the hydrogen distribution cavity, one end of the hydrogen distribution pipe extends out of the bottom end of the shell, and a hydrogen cover insulating plate and a frame shape are arranged between the side wall where the hydrogen distribution cavity is positioned and the galvanic pile.
9. The self-pressurizing cell stack as recited in claim 8, wherein holes are formed in both sides of an air distribution pipe in the frame, an air distribution block is disposed in the hydrogen distribution chamber, a plurality of holes are formed in both side walls of the cell body, and the end of the hydrogen distribution pipe is connected to the air distribution block.
10. The self-pressurizing stack as recited in claim 6, wherein 20 cells and associated flow field plates are stacked in sequence to form a stack, the second connecting rod is made of a stainless steel material resistant to 900 ℃, the first connecting rod is made of a stainless steel material resistant to 1000 ℃ to 1350 ℃, and the end of the first connecting rod extends into the groove at the end of the second connecting rod, is connected by screw threads, and is welded and fixed.
11. A self-pressurizing method for cell stack features that a cell stack is formed, and the top and bottom ends of said cell stack are equipped with pressurizing plates, which are connected by the pressurizing connecting assembly consisting of the first connecting rod, the second connecting rod and fastener to clamp the cell stack between said pressurizing plates.
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| CN202010565583.8A CN112117478A (en) | 2020-06-19 | 2020-06-19 | Pressure connection assembly, pressure device, self-pressurizing cell stack and cell stack self-pressurizing method |
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| CN112952144A (en) * | 2021-02-01 | 2021-06-11 | 浙江氢邦科技有限公司 | Novel solid oxide fuel cell stack hot area, hot area system and cell stack system |
| CN113314753A (en) * | 2021-07-30 | 2021-08-27 | 爱德曼氢能源装备有限公司 | Datum insert for fuel cell plate short circuit protection |
| CN114039077A (en) * | 2021-10-19 | 2022-02-11 | 北京和瑞储能科技有限公司 | Packaging equipment and method for assembling flow battery stack |
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