EP4197048A1 - Spann- und haltevorrichtung - Google Patents
Spann- und haltevorrichtungInfo
- Publication number
- EP4197048A1 EP4197048A1 EP21763026.8A EP21763026A EP4197048A1 EP 4197048 A1 EP4197048 A1 EP 4197048A1 EP 21763026 A EP21763026 A EP 21763026A EP 4197048 A1 EP4197048 A1 EP 4197048A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- clamping
- end plate
- holder
- holding
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 claims description 59
- 238000000034 method Methods 0.000 claims description 13
- 230000000284 resting effect Effects 0.000 claims description 7
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 230000036316 preload Effects 0.000 abstract description 2
- 239000000725 suspension Substances 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000002826 coolant Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2/00—Friction-grip releasable fastenings
- F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
- F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
- F16B2/08—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using bands
-
- 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
Definitions
- the invention relates to a clamping and holding device with at least one clamping means for a cubic or parallelepiped-shaped object that can be fixed under prestress and whose geometry and/or dimensions can be changed, the object having an end plate at each of two opposite ends.
- the invention also relates to a method for assembling such a clamping and holding device and a fuel cell stack which can be fixed and prestressed with such a clamping and holding device.
- Clamping and holding devices for clamping objects are known in numerous embodiments.
- clamping and holding devices are required in order to fix a fuel cell stack, often also referred to as a fuel cell stack, consisting of a large number of individual cells that follow one another in a stacking direction. Due to the electrical series connection of the individual cells, a high operating voltage required for many technical applications, for example several 100 V in the motor vehicle sector, is achieved.
- one end plate in each case closes off the fuel stack at the front.
- these end plates usually have various connections and bushings for the supply or removal of fuel, exhaust gas and coolant and, if necessary, fastening flanges.
- Such fuel cell stacks with end plates have to be braced against one another with relatively high prestressing forces in order to ensure proper functioning of the fuel cell stack in terms of tightness and electrical connectivity.
- the clamping and holding device should on the one hand have a high level of security against breakage or Tearing offer, but on the other hand allow a not inconsiderable change in geometry and / or dimensions of the fuel cell stack through resilient properties, without leaving a tolerance range of the necessary clamping force.
- a fuel cell stack with a clamping device is known from DE 10 2006 028 498 B4, in which several clamping straps made of steel or plastic extend around an end plate and are each fastened with their ends to an opposite end plate. Elastic length compensation elements are integrated into the straps to compensate for different length expansions of the fuel cell stack and the straps during operation and still be able to generate a sufficiently high contact force or sealing force between the fuel cell units by means of the clamping device.
- clamping devices for fuel cell stacks consist of a combination of tie rods made of steel and spring elements, such as plate springs, with the tie rods being fastened to the two end plates.
- DE 10 2017 212 085 A1 shows a fuel cell stack with a clamping device that includes two or more crossbeams that extend at least approximately perpendicular to the stacking direction, and at least one crossbeam is arranged at each end of the fuel cell stack.
- the crossbeams can be pulled towards one another by means of clamping elements, such as threaded rods, which are screwed to the crossbeams in order to clamp the fuel cell stack, the crossbeams being resiliently connected to the end plates of the fuel cell stack via disc springs.
- Further clamping devices for fuel cell stacks which have individual spring elements or sets of spring elements, such as disk springs or spiral springs, are known from DE 10 2016 122 442 A1 and DE 10 2012 219 022 A1.
- clamping devices for fuel cell stacks which use combinations of inextensible straps, such as steel straps, rigid clamping frames or clamping housings, on the one hand, and spring elements, on the other hand, in order to fix an object with components that can be modified in terms of geometry and/or dimensions, in particular a fuel cell stack, and at the same time allow the fuel cell stack to expand to allow and to comply with a certain bias, usually form a comparatively high additional cost factor in fuel cell production.
- such clamping devices increase the weight of a fuel cell stack not insignificantly.
- the invention was based on the object of proposing a clamping and holding device for a cubic or cuboid object that can be fixed under prestress, the components of which change their geometry or at least their distance from one another.
- This clamping and holding device should be simple and reliable to install and inexpensive to produce.
- such a clamping and holding device should be suitable for securely fixing and prestressing a fuel cell stack.
- a further object consists in specifying a method for assembling such a clamping and holding device.
- a fuel cell stack is to be presented which is held together elastically by means of a clamping and holding device according to the invention.
- the invention therefore initially relates to a clamping and holding device with at least one clamping means for a cubic that can be fixed under prestress or a cuboid object whose geometry and/or dimensions can be changed, the object having an end plate at each of two opposite ends.
- the invention provides that two laterally opposite brackets, which extend perpendicular to the pretensioning direction and parallel to one another, are arranged or formed on at least one of the end plates, each for receiving an associated holding rod, that the holders protrude laterally from the end plate, that the holders have recesses in the longitudinal direction of the same for guiding one or more tensioning means designed as elastic endless belts that wrap around the retaining rods, that the retaining rods are in non-positive engagement with the respective holders when the object is in the pretensioned state, and that the end plates are braced against one another by means of the at least one clamping means.
- a clamping device is a flat elastic endless band or a flat elastic endless belt, for example made of ethylene-propylene-die-elastomer (EPDM).
- a support rod is an elongate element compared to its diameter, such as a rod or shaft, for example with a circular or semi-circular cross-sectional geometry.
- a holder is an elongated lateral extension on an end plate for an object to be clamped or for a fuel cell stack to be clamped.
- such a holder is preferably formed or arranged on its longitudinal side.
- Such an end plate preferably has such a holder on each of its two longitudinal sides.
- Each holder has a groove for receiving a holding rod, this groove being divided into individual sections by recesses in the holder for the passage of clamping means.
- the respective channel has, for example, a semicircular, U-shaped or V-shaped geometry.
- An assembly tool is an elongate tubular or trough-shaped element for example a hollow shaft or the like, the inside diameter of which is larger than the outside diameter of the holding rod associated with this assembly tool. The assembly tool is used to temporarily hold the support rod for assembly purposes.
- top and bottom used in the further description and their derivations only serve for simple orientation when considering a fuel cell stack in the figures.
- the terms “left” and “right” can be used synonymously.
- the proposed clamping and holding device can be produced easily and inexpensively and can be installed in just a few assembly steps.
- the brackets are preferably integrated in one piece with the end plates.
- the end plates with the mounts integrated therein can be injection molded parts made of metal or plastic, but they can also be produced by milling. Only the associated holding rods and the elastic clamping means are required as separate components, so that the otherwise usual costs for clamping tools do not arise. In addition, the installation effort is low.
- the proposed clamping and holding device can be used advantageously in particular for securely fixing and prestressing a fuel cell stack.
- Suitable elastic endless belts with the required specifications in terms of size, strength, durability and chemical resistance are available on the market relatively inexpensively and also have a lower dead weight compared to arrangements with steel belts and spring assemblies.
- a clamping and holding device is not limited to fuel cell stacks, but is also suitable for clamping any objects with variable geometry and/or dimensions using elastic straps, on which the holders for the clamping means according to the invention are arranged or attached can be, and where achieves a constant prestressing force and at the same time, for example, an expansion of the object whose geometry can be changed should be permitted.
- brackets are arranged or formed on each end plate for receiving an associated holding rod, and that in the prestressed state of the object a bracket of an end plate is secured by means of at least one clamping means with a opposite bracket of the other end plate is braced.
- the end plates with the object arranged between them can be clamped against each other on two sides with at least one clamping means each.
- the object is therefore not wrapped around by the clamping means.
- No clamping device is guided over one of the end plates.
- the free surfaces of the two end plates are available without restriction for the arrangement of electrical contacts, various connections and bushings for the supply or removal of fuel, exhaust gas and coolant, and for the attachment of fastening flanges.
- there is space on the two end plates for the direct integration of sensors on the end plates, for example for measuring pressures and temperatures.
- a secure fixation of the object is achieved with an evenly distributed clamping force on the object.
- two laterally opposite brackets are arranged or formed on only one of the two end plates, each for receiving an associated holding rod, and that in the prestressed state the two brackets of the end plate are clamped together by means of at least one clamping device, with the at least one tensioning means wraps around the opposite end plate.
- the second endplate may be an unmodified conventional endplate.
- only two support rods are required for the two brackets of one end plate.
- the clamping means is accordingly guided over the second end plate and hung with tension in the two holders of the first end plate with the holding rods.
- the second end plate, around which the at least one clamping means is wrapped has a guide aid at least in a surface area of the same over which the at least one clamping means runs.
- This guiding aid can be a guide rail or the like, for example.
- a curved surface or a surface rounded in the edge areas of the end plate is also possible.
- the clamping means can therefore cling to the free surface of the second end plate.
- a curvature or rounding of the edges of the respective end plate ensures that the respective clamping means is not mechanically overloaded by a linear application of force.
- a further advantage is that such a curvature geometry optimizes the course of stress in the respective end plate and its deformation with regard to previously specified requirements.
- Another embodiment provides that several tensioning means designed as endless belts are arranged next to one another on a holding rod. As a result, particularly large clamping forces can be generated on the one hand. On the other hand, a particularly uniform distribution of force on the prestressed object is achieved.
- a first means for re-tensioning the object is a holding rod, which is designed as a shaft with an eccentric cross-sectional geometry.
- the retaining rod can be rotated about its longitudinal axis in a holder designed to match it geometrically and can be fixed in a twisted position.
- the tensioning means placed on the holding rod can be stretched more or less, and the tensioning force of the tensioning means exerted on the object can be increased or reduced in accordance with the stretching of the tensioning means.
- This arrangement allows the tensioning force to be corrected, both in the direction of loosening, ie a lower pretension, and in the direction of tightening, ie a higher pretension of the object.
- a spacer can be provided, which can be inserted into the holder between a depression or groove in the holder and the retaining rod, in order to stretch the tensioning means placed on the retaining rod more and to reduce the tension force exerted on the object to increase the clamping device.
- the invention provides the three method variants described below:
- Assembly steps according to variant no. 1 a) Place at least one elastic, endless clamping device with undersize on a first upper support rod and a second upper support rod as well as on an assigned first lower support rod and an assigned second lower support rod, b) the two upper support rods place a first end plate in its first holder or in its second holder, c) prestress the object by applying a force to one of the end plates, d) Insert the two lower support rods on the second end plate in its third holder or in its fourth holder, e) Relieve the end plate of the force.
- Assembly steps according to variant no. 2 f) place at least one elastic, endless clamping device with undersize on a first upper retaining rod or a second upper retaining rod, g) place the at least one clamping device resting on the first upper retaining rod on a first tubular or channel-shaped assembly tool , h) place the at least one clamping device resting on the second upper retaining rod on a second tubular or channel-shaped assembly tool, i) place the two upper retaining rods on the first end plate in a first holder there or in a second holder there, j) hold the object by means of the action of a force on one of the end plates, k) the first assembly tool taking along the clamping means resting there on the second end plate into a third holder there and the second assembly tool taking along the clamping means resting there on the second end plate into a d insert the local fourth holder, l) insert a first lower retaining rod into the first assembly tool and a second lower retaining rod into the second assembly tool, m)
- Assembly steps according to variant no. 3 o) Place at least one elastic, endless clamping device with undersize on a first support rod, p) Insert the first support rod on the first end plate in a first holder, q) Fix the object by applying a force to one of the preload end plates, r) place the at least one endless elastic tensioning device on a second retaining rod and, taking the at least one tensioning device with it, guide it back over the second end plate to the first end plate and insert the second retaining rod there into the second holder of the first end plate, s) only when used an assembly tool: Insert one retaining rod into the assigned assembly tool, insert the assembly tool into an assigned holder and, after process step r), remove the assembly tool from the respective holder, leaving the retaining rod and the clamping device behind, t) relieve the end plate of the force.
- the assembly of a tensioning and holding device according to the invention for pretensioning and fixing a fuel cell stack with an upper end plate and a lower end plate can be carried out, for example, as follows:
- Several elastic endless bands for example a first elastic endless band and a second elastic endless band, are attached next to each other on an upper Suspension point (upper, first end plate) placed on a first support rod and at a lower suspension point (lower, second end plate) on a first assembly tool.
- an upper Suspension point upper, first end plate
- a lower suspension point lower, second end plate
- the two first and second endless straps can be placed directly on a third support rod at the lower suspension point.
- a third endless elastic band and a fourth endless elastic band are placed side by side on a second support rod at an upper suspension point (upper, first endplate) and on a second assembly tool at a lower suspension point (lower, second endplate).
- the two third and fourth endless belts can be placed directly on a fourth support rod at the lower suspension point.
- the holding rods or assembly tools equipped in this way at the upper suspension points are placed in the relevant holders on the upper end plate.
- the endless belts can be positioned and the support rods or assembly tools can be guided and held in place manually using a simple tool or in an automated manner, for example using a robot arm and/or using a spindle drive.
- the fuel cell stack is subjected to an areal force load, for example by lowering a defined mass or exerting a defined hydraulic pressure, on an end plate, for example on the upper end plate, and is thereby elastically compressed.
- an areal force load for example by lowering a defined mass or exerting a defined hydraulic pressure, on an end plate, for example on the upper end plate, and is thereby elastically compressed.
- the support rods or assembly tools are positioned in their final position in the holders of the lower end plate. If necessary, the clamping means for inserting the support rods or assembly tools into the holders of the lower end plate can be additionally expanded using an expansion tool.
- the third retaining rod and the fourth retaining rod can now be inserted into the first assembly tools and into the second assembly tools, which are preferably tubular.
- the associated assembly tools are withdrawn from the holders, leaving behind the lower support rods and the tensioning means or endless belts.
- the contact surfaces of the assembly tools can be pre-treated with a lubricant to minimize friction when removing the assembly tools from the support rods and the clamping means.
- the support rods are now seated on both end plates with a force fit in the respective associated holders due to the endless belts, which are now tensioned due to their undersize.
- the fuel cell stack is fixed under prestress between the two end plates.
- the endless belts are advantageously designed in such a way that a predetermined resultant prestressing force of the prestressed fuel cell stack is achieved.
- the assembly may deviate from the procedure described last.
- elastic endless bands for example a first elastic endless band and a second elastic endless band, are placed side by side around a first support rod in the area of a first holder of the upper end plate and around a second support rod in the area of a lower suspension point. After a normal force acts on one of the end plates or the fuel cell stack, the endless belts are looped around the second, lower end plate, returned to the first, upper end plate and attached to the laterally opposite second holder by means of the second retaining rod on the upper end plate.
- the invention also relates to a fuel cell stack, with a clamping and holding device for prestressing and fixing the same, which is constructed according to one of the device claims and can be assembled according to at least one of the method claims.
- FIG. 1 shows a perspective overview of a fuel cell stack with an upper end plate and a lower end plate, and with a clamping and holding device according to the invention in the assembled state
- FIG. 2 shows a plan view of the fuel cell stack according to FIG. 1 with the upper end plate with two lateral brackets before the clamping and holding device is installed
- FIG. 3 shows a detailed view of two elastic endless belts, each suspended on an upper support rod at an upper fictitious suspension point and on an assembly tool with a lower support rod accommodated therein at a fictitious lower suspension point,
- FIG. 4 shows a detailed view of the endless belts according to FIG. 3, each with an upper holding rod and a lower holding rod, but without an assembly tool,
- FIG 5 shows a plan view of the fuel cell stack and the upper end plate according to FIG Holding rods inserted in the holders of the upper end plate and elastic endless belts suspended thereon with a normal force acting on the upper end plate,
- FIG. 7 shows a perspective partial view of the fuel cell stack according to FIG. 1 with the lower end plate and a lateral bracket that can be seen there, as well as with a tubular assembly tool inserted in a channel of the bracket with a lower holding rod coaxially accommodated therein, and with the elastic endless bands attached to it the assembly of the tensioning and holding device, with the two support rods and an endless belt to the right of them also being shown schematically there, and
- FIG. 8 shows the lower end plate with the retaining rod inserted in a holder and with the endless straps attached to it after the assembly tools have been removed and the force has been relieved in the prestressed state of the fuel cell stack, with the two retaining rods and an endless strap to the right also being shown schematically there.
- the cuboid fuel cell stack 1 shown in FIG. 1 has a multiplicity of individual cells 2.1, 2.2, which are stacked one on top of the other lengthwise to a stacking and prestressing direction 3 and form the fuel cell stack 1.
- the individual cells 2.1, 2.2 are held on the face side by a first end plate 4, hereinafter referred to as the upper end plate 4, and a second end plate 5, hereinafter referred to as the lower end plate 5, and by means of a clamping and holding device 6, to be described in more detail, in the aforementioned stacking and Biasing direction 3 biased.
- the two end plates 4, 5 have, in a manner known per se, electrical contacts and various bushings for the supply and removal of fuel, exhaust gas and coolant and fastening flanges. These connections are not part of the invention and will therefore not be described in detail.
- the clamping and holding device 6 has on the upper end plate 4 a first bracket 7 and a second bracket 8 which are arranged laterally oppositely parallel to one another and each protrude from the upper end plate 4 in a transverse direction.
- the upper end plate 4 and its two holders 7, 8 are made in one piece from a plastic or a plastic-aluminum composite in an injection molding process.
- the two holders 7, 8 on the upper end plate 4 each consist of five transverse webs 7.1, 7.2, 7.3, 7.4, 7.5; 8.1, 8.2, 8.3, 8.4, 8.5, in each of which a half-shell-shaped channel 7a, 7b, 7c, 7d, 7e; 8a, 8b, 8c, 8d, 8e.
- the peripheral openings of the upper half-shell-shaped channels 7a, 7b, 7c, 7d, 7e each point upwards away from the individual cells 2.1, 2.2, while the peripheral openings of the lower half-shell-shaped channels 8a, 8b, 8c, 8d, 8e each point downwards.
- the two mounts 7, 8 are integral components of the upper end plate 4.
- first crossbar 7.1 and the second crossbar 7.2 and between the fourth crossbar 7.4 and the fifth crossbar 7.5 of the first mount 7 and between the first crossbar 8.1 and the second crossbar 8.2 and between the fourth transverse web 8.4 and the fifth transverse web 8.5 of the second holder 8 are in each case recesses 10a, 10b, 11a, 11b.
- These recesses 10a, 10b, 11a, 11b are used for the passage of elastic endless belts Clamping means 12a, 12b, 13a, 13b, which can be seen, inter alia, in FIG.
- clamping means 12a, 12b, 13a, 13b there are two clamping means 12a, 12b, 13a, 13b arranged next to one another.
- the two brackets 14, 15 on the lower end plate 5 each consist of five transverse webs 14.1, 14.2, 14.3, 14.4, 14.5; 15.1, 15.2, 15.3, 15.4, 15.5, in each of which a half-shell-shaped channel 14a; 15a is formed.
- the peripheral openings of these half-shell shaped grooves 14a; 15a point downwards away from the individual cells 2.1, 2.2.
- the two brackets 14, 15 are integral parts of the lower end plate 5.
- first transverse web 14.1 and the second transverse web 14.2 and between the fourth transverse web 14.4 and the fifth transverse web 14.5 of the first lower bracket 14 and between the first transverse web 15.1 and the second transverse web 15.2 and between the fourth transverse web 15.4 and the fifth transverse web 15.5 of the second lower bracket 15 are recesses 17a, 17b; 18a, 18b formed. These recesses 17a, 17b; 18a, 18b are used for the passage of said tensioning means 12a, 12b, 13a, 13b, designed as elastic endless belts.
- Each of the four brackets 7, 8; 14, 15 are each assigned a holding rod 19, 20, 21, 22.
- These holding rods 19, 20, 21, 22 are used to hold the clamping means 12a, 12b, 13a, 13b and are presently designed as round rods which form-fit into the half-shell-shaped grooves 7a, 7b, 7c, 7d, 7e; 8a, 8b, 8c, 8d, 8e; 14a; 15a of the associated upper or lower mounts 7, 8; 14, 15 are inserted.
- FIG. 1 shows the fuel cell stack 1 in the fully assembled and prestressed state
- the individual assembly steps of the clamping and holding device 6 are described below with reference to FIGS.
- FIG. 2 shows a perspective top view of the upper end plate 4 of the fuel cell stack 1 before the mounting of the clamping and holding device 6.
- FIG. 3 shows a first clamping means 12a and a second clamping means 12b, which are suspended at a distance from one another but next to one another on the first holding rod 19 and on a first assembly tool 23.
- the first assembly tool 23 is essentially designed as a hollow shaft or tubular, into which the third, lower retaining rod 21 is inserted with radial play.
- the first assembly tool 23 serves to simplify the assembly and to clamp the clamping and holding device 6 on the fuel cell stack 1 .
- This first clamping device arrangement according to FIG. 3 is prepared for hanging in the first holder 7 on the upper end plate 4 on the one hand and in the third holder 14 on the same side on the lower end plate 5 (see FIG. 1 ).
- FIG. 3 shows a second clamping means arrangement with a third clamping means 13a and a fourth clamping means 13b, which are suspended at a distance from one another but next to each other at the top of the second holding rod 20 and at the bottom on a second assembly tool 24 with the fourth holding rod 22 inserted therein.
- This second clamping means arrangement is prepared for hooking into the second holder 8 on the upper end plate 4 on the one hand and for hooking into the fourth holder 15 on the same side on the lower end plate 5 (see FIG. 7).
- FIG. 4 shows the two clamping means arrangements, but prepared for an alternative assembly method in which assembly aids, ie assembly tools 23, 24, as shown for hanging onto the lower end plate 5, are dispensed with.
- FIG. 5 shows the two clamping means arrangements mentioned with the first holding rod 19 and the second holding rod 20, which are inserted into the first holder 7 and the second holder 8 on the upper end plate 4, respectively.
- these two clamping means arrangements cannot yet be used, or at most by means of a strong overstretching of the clamping means 12a, 12b; 13a, 13b can be hung in the third holder 14 and in the fourth holder 15 on the lower end plate 5, since the length of the tensioning means 12a, 12b, 13a, 13b designed as elastic bands is designed to be undersized. Therefore, the axial distance between the two end plates 4, 5 must first be reduced in a subsequent assembly step by a pressing device, not shown.
- FIG. 6 the action of a normal force 25 on the upper end plate 4 in the stacking and prestressing direction 3 is indicated.
- This application of force compresses the stack with the individual cells 2.1, 2.2, so that the axial length of the fuel cell stack 1 is reduced as required.
- the two clamping means arrangements can now be hung with the two assembly tools 23, 24 in the associated holders 14, 15 on the lower end plate 5.
- the associated retaining rods 21, 22 can either have already been inserted into the assembly tools 23, 24 beforehand or only subsequently, ie after the assembly tools 23, 24 have been hung in the holders 14, 15 of the lower end plate 5.
- FIG. 8 shows the assembled state in which the assembly tools 23, 24 have already been pulled off the holding rods 21, 22 coaxially, so that all the holding rods 19, 20, 21, 22 with the clamping means 12a, 12b, 13a, 13b in the associated holders 7, 8; 14, 15 intervene.
- the action of the normal force 25 on the upper end plate 4 can now be ended, so that the fuel cell stack 1 attempts to expand in the stacking and prestressing direction 3 .
- the expansion path is limited by the expansion of the fuel cell stack 1 counteracting clamping force of the stretched clamping means 12a, 12b, 13a, 13b of the clamping and holding device 6, as a result of which the individual cells 2.1, 2.2 are clamped securely against each other via the two end plates 4, 5 and fixed are and the permanent tightness and electrical connectivity of the fuel cell stack 1 is guaranteed.
- the lower end plate 5 has no holders.
- the two elastic tensioning means 12a, 12b which rest on the first and third support rods 19, 21, can be made longer.
- the tensioning means arrangement extended in this way wraps around the lower end plate 5 and is hung on the upper end plate 4 on its first holder 7 and second holder 8 with tension, so that the two end plates 4, 5 are braced against one another with a pretensioning force.
- one or more brackets 7, 8, 14, 15 on the end plates 4, 5 and/or one or more support rods 19, 20, 21, 22 held there can have eccentric cross-sections and locking means for locking the support rods 19, 20, 21, 22 in the direction of rotation about their longitudinal axis.
- a higher prestress can also be achieved by introducing one or more simple spacer elements into the half-shell-shaped depressions or grooves 7a, 7b, 7c, 7d, 7e; 8a, 8b, 8c, 8d, 8e of one or more holders 19, 20, 21, 22 can be reached.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Fuel Cell (AREA)
- Clamps And Clips (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020210372.0A DE102020210372A1 (de) | 2020-08-14 | 2020-08-14 | Spann- und Haltevorrichtung |
PCT/EP2021/071979 WO2022033970A1 (de) | 2020-08-14 | 2021-08-06 | Spann- und haltevorrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4197048A1 true EP4197048A1 (de) | 2023-06-21 |
Family
ID=77564076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21763026.8A Pending EP4197048A1 (de) | 2020-08-14 | 2021-08-06 | Spann- und haltevorrichtung |
Country Status (5)
Country | Link |
---|---|
US (1) | US20230327168A1 (de) |
EP (1) | EP4197048A1 (de) |
CN (1) | CN116114092A (de) |
DE (1) | DE102020210372A1 (de) |
WO (1) | WO2022033970A1 (de) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006028498B4 (de) | 2006-06-21 | 2016-04-14 | Elringklinger Ag | Brennstoffzellenstapel |
US8007951B2 (en) * | 2007-06-08 | 2011-08-30 | GM Global Technology Operations LLC | Fuel cell compression retention system using compliant strapping |
JP4598883B2 (ja) * | 2009-02-05 | 2010-12-15 | パナソニック株式会社 | 高分子電解質型燃料電池スタック |
KR101550596B1 (ko) * | 2009-10-14 | 2015-09-08 | 현대자동차 주식회사 | 체결장치 및 이를 포함하는 연료 전지 스택 |
DE102012219022B4 (de) | 2012-10-18 | 2021-05-27 | Scheuermann & Heilig Gmbh | Spannsystem für einen Brennstoffzellenstack |
DE102016122442A1 (de) | 2016-11-22 | 2018-05-24 | Audi Ag | Pressvorrichtung zum Pressen eines Brennstoffzellenstapels und Brennstoffzellenvorrichtung mit Pressvorrichtung |
DE102017212085A1 (de) | 2017-07-14 | 2019-01-17 | Elringklinger Ag | Brennstoffzellenvorrichtung |
DE102018210170A1 (de) * | 2018-06-22 | 2019-12-24 | Audi Ag | Brennstoffzellenstapel |
DE102018210181A1 (de) * | 2018-06-22 | 2019-12-24 | Audi Ag | Brennstoffzellenstapel |
-
2020
- 2020-08-14 DE DE102020210372.0A patent/DE102020210372A1/de active Pending
-
2021
- 2021-08-06 US US18/041,685 patent/US20230327168A1/en active Pending
- 2021-08-06 WO PCT/EP2021/071979 patent/WO2022033970A1/de unknown
- 2021-08-06 EP EP21763026.8A patent/EP4197048A1/de active Pending
- 2021-08-06 CN CN202180055508.XA patent/CN116114092A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
CN116114092A (zh) | 2023-05-12 |
WO2022033970A1 (de) | 2022-02-17 |
US20230327168A1 (en) | 2023-10-12 |
DE102020210372A1 (de) | 2022-02-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1524463B1 (de) | Halterung für langgestreckte Gegenstände, insbesondere Kabel | |
DE3327817A1 (de) | Gummi-metall-buchse, insbesondere fuer die lagerung eines stabilisators an einem kraftfahrzeug | |
DE112007002400T5 (de) | Bandschelle zum Sichern einer Aufblaseinrichtung an einem Airbagmodulgehäuse | |
DE3830445A1 (de) | Klammerhalterung zur befestigung einer trommel an einer haltestange | |
DE102010014497B4 (de) | Kraftstoffverteileinrichtung für ein Kraftfahrzeug, Kraftfahrzeug und Verfahren zum Fertigen einer Kraftstoffverteileinrichtung | |
WO2006114168A1 (de) | Spannvorrichtung eines zugmitteltriebes | |
EP2667049B1 (de) | Anordnung mit Schraubenfeder und Haltemitteln, Verwendung von Haltemitteln und Verfahren zur Montage von Schraubenfedern | |
WO2022033970A1 (de) | Spann- und haltevorrichtung | |
DE102008021916A1 (de) | Seitenstabiles Pendellager | |
EP3859853B1 (de) | Batterieanordnung | |
EP3294592B1 (de) | Gassackmodul sowie baugruppe | |
DE10310306A1 (de) | Vorrichtung zum Spannen einer Statorwicklung | |
EP1892160B1 (de) | Verfahren und Vorrichtung zum Befestigen eines Airbags an einem Kraftfahrzeug | |
DE102019212588A1 (de) | Vorrichtung und Verfahren zur Verspannung einer Brennstoffzelle | |
DE102018213647A1 (de) | Führungsschienenhaltesystem für eine Fahrtreppe | |
DE3504171C2 (de) | Spule für elektrische Geräte mit Vorspannvorrichtung für die voneinander abgewandten Stirnflächen | |
DE102019208165B3 (de) | Blattfederaufnahme zur Aufnahme einer Blattfeder eines Kraftfahrzeuges, Blattfedereinspannung und Kraftfahrzeug | |
EP1086331B1 (de) | Aufhängeöse für eine schwingende last, insbesondere für eine abgasanlage eines kraftfahrzeugs | |
DE4317265C1 (de) | Spannvorrichtung | |
DE112017003461T5 (de) | Anordnung zum Anbringen eines Kraftstofftanks für ein Motorfahrzeug | |
DE102019133572A1 (de) | Batteriemodul für eine Traktionsbatterie | |
DE102009055664B3 (de) | Brennstoffzellenanordnung | |
DE102017201088A1 (de) | Spann- oder Führungsschiene für einen Kettentrieb einer Brennkraftmaschine | |
WO2005007461A1 (de) | Airbagmodul mit einem durch clipsverbindung schwingungsdämpfend aufgehängten gasgenerator | |
DE102022131158A1 (de) | Einspannvorrichtung und verfahren zum einspannen eines kabels und halten eines bauteils während eines konfektionierungsvorgangs |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20230314 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CONTITECH DEUTSCHLAND GMBH |