Apparatus and method for assembling an electrochemical cell stack

Abstract

The present invention relates to a method for assembling an electrochemical cell stack, comprising the following steps: assembling a first stacking component (140) having a first calibration opening (115) onto an electrochemical partial stack by means of the cooperation of the first calibration opening (115) and a first calibration device (110); and supplementing the first calibration device (110) along the construction direction of the electrochemical partial stack for locally calibrated assembly of a second stacking component, the second stacking component having a corresponding first calibration opening for locally calibrated assembly.

Description

Background Art

[0001] Electrochemical devices based on electrochemical cell stacks may include electrochemical cells for converting electrical energy into chemical energy or converting chemical energy into electrical energy. Examples of electrochemical devices include polymer electrolyte membrane (PEM) fuel cells, solid oxide fuel cells (SOFC) fuel cells, typically high temperature or low temperature fuel cells, and electrolyzers or redox flow batteries.

[0002] Fuel cells or batteries as examples of electrochemical devices are often used as a source of electricity for supplying electric motors or machines or stationary distributed energy systems. In this context, electric drives are increasingly part of vehicle drives for electric bicycles, electric cars, hybrid vehicles and other vehicles. Such systems ensure efficient energy supply and have the advantage of environmental protection.

[0003] Fuel cells convert chemical reactants (i.e., fuel and oxidant) into reaction products in an electrode reaction, which provides electrical energy. Fuel cells generally use an electrolyte arranged between two electrodes (i.e., a cathode and an anode). Catalysts generally promote or provide the desired electrochemical reaction at the electrodes.

[0004] Electrochemical cells may include a proton exchange membrane (PEM) which is the basis of a membrane electrode assembly (MEA). Such a membrane electrode assembly is formed by a double-sided catalyst-coated membrane disposed between a pair of gas diffusion layers.

[0005] Since a single fuel cell does not generate much energy and only a small voltage (eg, approximately 0.7-0.9 volts), a plurality of fuel cells or electrochemical cells may be arranged together in a stack in order to generate, for example, sufficient electrical energy to operate a motor vehicle or to generate sufficient fuel.

[0006] The construction of such a stack results in a huge number of repeated stacking components for producing such an entire stack consisting of, for example, bipolar plates and membrane electrode units. Dimensional tolerances of the stacking components may cumulatively result in an irregularly shaped stack.

[0007] Irregularly shaped cell stacks of this type can result in particular when successive stack components, such as bipolar plates with membrane electrode units arranged therebetween, are not oriented well enough. Typically, external calibration elements attempt to align the various stack components, such as bipolar plates and membrane electrode assemblies. Due to the significant manufacturing tolerances of the bipolar plates, and in particular due to the flexible and unstable membrane electrode assemblies, such calibration elements arranged on the outside of such a cell stack must have a sufficient spacing from the stack components in order not to get stuck.

[0008] This large distance has the result that the stack of components assumes an unfavorable position, in particular if the dimensions of the stack of components are very small due to production tolerances and if they are placed on one another on outer alignment elements.

[0009] It should also be noted that, for the electrical insulation of adjacent bipolar plates, the unstable membrane electrode unit must end at the edge of the bipolar plate or have a projection, whereby existing production tolerances of the individual stack components can have a greater influence. Summary of the invention

[0010] Aspects of the invention relate to a method for assembling an electrochemical cell stack, a device for assembling stack components and the use of the device according to the features of the independent claims. Advantageous embodiments are subject matter of the dependent claims and of the following description.

[0011] The invention is based on the recognition that additional adjustment of at least one alignment device in a corresponding alignment opening of a stack improves the accuracy of the partially aligned stack assembly, in particular when the alignment device is designed to always position only the upper part of the stack.

[0012] It should be pointed out that the features and measures listed individually in the following description can be combined with each other in any technically feasible manner and reveal further embodiments of the present invention. The description, in particular in conjunction with the drawings, additionally characterizes and explains the present invention in detail.

[0013] According to one aspect, a method for assembling an electrochemical cell stack is provided. In a first step of the method, a first stacking component having a first calibration opening is assembled onto an electrochemical partial stack by means of the first calibration opening in cooperation with a first calibration device. In a further step, the first calibration device is supplementally adjusted in the construction direction of the electrochemical partial cell stack in order to assemble a second stacking component in a partially calibrated manner, wherein the second stacking component has a corresponding first calibration opening for the partially calibrated assembly.

[0014] Such an electrochemical cell stack can be used to convert electrical energy into chemical energy or vice versa. Examples of such conversions are fuel cells, redox flow batteries or electrolysis cells.

[0015] The stacked electrochemical cells arranged side by side can have between their cathode plate and anode plate a membrane-electrode assembly at which the actual electrochemical reaction takes place.

[0016] With the aid of such an electrochemical cell stack, for example, a fuel cell stack (also referred to as a fuel cell stack) can be constructed. A plurality of electrochemical cells arranged side by side in layers can include a small number of cells, for example two or three cells, a plurality can also include 100 cells, or a greater number of electrochemical cells can be arranged side by side in a stacked arrangement in order to form, for example, a fuel cell stack.

[0017] When assembling or arranging the stack components, these stack components can interact with each other so that irregularities (which are caused by the production or assembly of membrane electrode units or bipolar plates and are often unavoidable, for example) accumulate. In this case, the supplementary adjustment of the first calibration device in the construction direction means that, when the height of the electrochemical part stack increases, the first calibration device can be arranged by assembling further second stack components in such a way that the assembly of the second stack components can be carried out in an optimally calibrated manner with the help of the first calibration device.

[0018] The stack component may include, for example, an electrochemical cell or a component of an electrochemical cell, such as a bipolar plate or a membrane electrode unit or another component of an electrochemical cell or a preassembled component of an electrochemical cell.

[0019] Advantageously, this results in that the membrane electrode unit is first installed as a stack component before the bipolar plate is installed as a second stack component by the method. The mutual alignment of the two stack components allows any corrugations of the membrane electrode unit to be leveled without great effort by installing the subsequent bipolar plate.

[0020] With this method, even when the height of the electrochemical cell stack is increased, an aligned assembly of the stack components, in particular in the horizontal direction, is possible, since the alignment device is adjusted in addition.

[0021] Such an alignment opening can be completely located inside the stack or can also be partially open toward the edge of the stack. Here, in a partially aligned assembly, the second stack is essentially aligned relative to the first stack below it.

[0022] The term “electrochemical cell stack” should be interpreted broadly and includes not only an electrochemical partial stack but also an electrochemical partial stack which has been equipped with a first stack component and / or a second stack component.

[0023] A supplementary adjustment of the first and / or second calibration device can be carried out when the calibration region of the calibration device is increased for the calibrated mounting of the second stack component as the stack height increases.

[0024] By locally calibrating the first stacking component with the first calibration opening to the first calibration device, a misalignment of the gas channels of the bipolar plate and the further bipolar plate, which can be the first stacking component, can be prevented. Such a misalignment should be avoided because if the corresponding gas channels of the resulting bipolar plates are misaligned too much, when the electrochemical cell stack is pressed after assembly, the gas diffusion layer arranged between the bipolar plates is pressed into the gas channels of the bipolar plates, which can lead to an uneven gas distribution. This is particularly critical when the electrochemical properties (for example, power density) differ from one electrochemical cell to another, and thus from one electrochemical cell to another.

[0025] The subgaskets, which respectively contain the membrane, should end flush with the adjacent bipolar plates or extend beyond them in order to avoid possible short circuits at the edges of the cell stack due to potential differences. Exact calibration using the method described here can avoid the situation where, due to manufacturing tolerances, the corresponding dimensions have to be selected so that the corresponding subgaskets (especially within the ports provided for the inlet and outlet of process gases) can withstand the resulting undesired throttling of the gas flow in the ports.

[0026] In this case, the membrane-electrode unit is designed to be relatively wide and includes not only the membrane-electrode unit itself but also the membrane-electrode unit enclosed or framed by the auxiliary gasket or having the auxiliary gasket.

[0027] Furthermore, this method allows for automated assembly of electrochemical cell stacks using machines or robots, since accumulated deviations in the orientation of the cell stack can be reduced by such calibration, so that the orientation effect of a corresponding calibration device with a corresponding calibration opening is sufficient for automated assembly.

[0028] Because according to the current prior art, the stack ends are often held in one position by means of fixed bearings and, due to possible misalignment of the cell stack during stacking, the stack ends are supported by floating bearings, since the ends of the cell stack must not be deformed by external forces for the function of the electrochemical cell stack. As a result, additional installation space must be provided for each electrochemical cell stack due to the positioning tolerances of the cell stack ends. Furthermore, during assembly, the floating bearings must be moved within a wide range and adapted to the actual position.

[0029] By additionally adjusting the first calibration device for assembling the second stack component in the method proposed here, the first calibration device can be set in such a way that even if the electrochemical partial stack has reached a certain height of, for example, more than 50 mm or more than 50 electrochemical cells, only a part of the stack components in the electrochemical partial stack is calibrated, in particular locally, without damaging the unstable secondary gaskets of thin bipolar plates or membrane electrode units after the complete assembly of the cell stack, even though the size of the clearance fit between the first calibration device and the first calibration opening is designed with a small clearance. In other words, with this method, the effective orientation of the electrochemical cell stack is limited to a certain height range corresponding to the local calibration.

[0030] According to one aspect, a plurality of stack components are arranged between the first and second stack components.

[0031] According to one aspect, it is proposed that the first calibrated opening and / or the second calibrated opening is arranged completely inside the first and / or the second stack element.

[0032] According to one aspect, the first stack component and the second stack component each have a corresponding second calibration opening and are mounted on the electrochemical partial stack in a partially calibrated manner by means of a second calibration device, wherein the second calibration device is adjusted in the construction direction of the electrochemical partial stack for mounting the second stack component.

[0033] In particular, the first calibrating device and the second calibrating device can be adjusted synchronously to complement each other for the assembly of the second stack element.

[0034] In this case, the corresponding calibration openings of the corresponding stacking parts, which are assigned to one another, interact with the corresponding calibration device, so that an calibration effect for the assembly of the stacking parts is achieved due to the interacting dimensions and interacting shapes of the corresponding calibration openings and the corresponding calibration device.

[0035] According to one aspect, it is proposed that the first and / or second stack component is assembled by means of an overall calibration device arranged outside the electrochemical partial stack.

[0036] Since such an overall calibration device arranged outside the electrochemical partial stack can be embodied mechanically rigidly over the entire height of the electrochemical cell stack, an overall calibration of the electrochemical cell stack can be performed in this way, which supports a local calibration such as that brought about by the first or second calibration device.

[0037] According to one aspect, it is provided that the first stack element and / or the second stack element is positioned with a first calibrated opening and oriented with a second calibrated opening during assembly.

[0038] By providing each of the stacking components with a first and a second calibration opening, which cooperate with the first and second calibration devices for calibration, the first calibration opening can cooperate with the first calibration device to position the stacking component, and the second calibration opening can be arranged to cooperate with the second calibration device so that the stacking component is oriented accordingly.

[0039] The proposed method can keep positioning deviations between individual electrochemical cells or between individual bipolar plates small. For example, the first calibrated opening can be designed as a rotationally symmetrical hole, and the second calibrated opening can be designed as a slot that is oriented in the direction of the rotationally symmetrical hole.

[0040] Thus, the first calibration device can be designed, for example, as a round pin, which interacts with the first calibration opening to achieve the most accurate possible positioning of the first stacking part. By means of the second calibration opening in the form of a slot, the corresponding stacking part can be oriented about this determined position by rotation. Thus, tolerances in the dimensions of the stacking parts can also be compensated with this method and an exact calibration of the stacking parts relative to one another can nevertheless be achieved.

[0041] According to one aspect, it is proposed that during assembly of the first and / or second stack element, the respective calibration device and the respective calibration opening are dimensioned with a first clearance fit.

[0042] According to one aspect, when assembling the first and / or second stack components, a second clearance fit exists between the corresponding calibration device and the corresponding calibration openings of multiple stack components of the electrochemical partial stack below the first stack component, and the size of the first clearance fit is narrower than the second clearance fit.

[0043] In particular, the small first clearance fit allows particularly good alignment of the stack components relative to one another during assembly of the stack components. This applies in particular to stack components that are stacked one on top of the other and that interact with the first or second alignment opening of the respective stack component at a certain time or in a certain position of the first or second alignment device.

[0044] According to one aspect, it is proposed that the first and / or second calibration device is positioned for calibration by means of a positioning device and / or by means of a corresponding calibration opening of a plurality of stack components of the electrochemical part stack assembled one above the other. Such a positioning device can be provided, for example, by a base plate in which the first and / or second calibration device is positioned if the electrochemical part stack has a small height at the beginning of the assembly of the stack components. When the height of the electrochemical part stack increases, the first and / or second calibration device can be arranged to cooperate with only a part of the stack components of the electrochemical part stack so that the corresponding calibration device is positioned through the first or second calibration opening in the corresponding stack component.

[0045] This makes it possible for the corresponding calibration device to calibrate the respectively newly assembled stack components in a certain upper area of ​​the electrochemical partial stack and for the corresponding calibration device to be supplementally adjusted along the construction direction of the electrochemical partial stack or to be removed from the electrochemical partial stack without damaging other stack components placed further down in the partial stack.

[0046] Here, the first and / or second calibration device can have a first area in which the corresponding calibration device interacts with the corresponding calibration opening by means of a first clearance fit in order to achieve calibration of the stacked components in this area. The length of this first area of ​​the calibration device can be selected so that for the stacked components arranged further down in the stack, the friction between the stacked components and the weight due to gravity are sufficient so that no additional fixing of orientation or calibration is required for all other stacked components located further down. In the corresponding second area of ​​the first and / or second calibration device, the clearance fit between the first and / or second calibration device and the corresponding calibration opening of the stacked component can be achieved with larger dimensions, so that the first and / or second calibration device can be removed after the assembly of the electrochemical cell stack is completed without damaging the stacked components, in particular in the construction direction of the electrochemical cell stack. In other words, this means that the first and / or second calibration device is arranged to interact with the corresponding calibration opening only in the first area of ​​the first and / or second calibration device by means of a corresponding tight clearance fit, so that calibration of the corresponding stacked components can be achieved.

[0047] According to one aspect, it is provided that after the first or second stack component has been assembled, the first and / or second calibration device is removed from the electrochemical partial stack in the building direction of the electrochemical partial stack.

[0048] By arranging the first and / or second calibration device so as to be removable from the electrochemical partial stack in the construction direction, no stack components located further below are damaged by the removal of the calibration device, since the respective calibration device is arranged to cooperate only with a portion of the stack components of the electrochemical partial stack for local calibration.

[0049] According to one aspect, it is proposed that the first and / or the second calibration device is / are adjusted after a plurality of stack components have been assembled several times in the assembly direction of the partial stack.

[0050] This multiple assembling can comprise a small amount of assembling, for example one, twice or three times assembling, and also can comprise 10 times or even more times many times, so that the assembling of optimized stacking parts.For example, supplementary adjustment is always just carried out when subassembly is made up of a plurality of different stacking parts of assembling.

[0051] According to one aspect, it is provided that the first and the second stack components are of different types.

[0052] Since the method allows the corresponding stack components of the electrochemical cell stack to be locally aligned with one another particularly precisely, the stack components can be not only individual electrochemical cells but also subunits of electrochemical cells, such as membrane electrode units or bipolar plates. In other words, it is not necessary to previously connect the subunits of the electrochemical cells to one another before assembling the electrochemical cell stack to form a cell stack.

[0053] An electrochemical cell stack is proposed, the stack components of which are assembled according to one of the above-mentioned methods.

[0054] An electrochemical cell stack, for example a fuel cell stack, assembled in this way has particularly low variations in its assembly due to the local calibration, and due to the precise calibration using the method the entire electrochemical cell stack is assembled in a straight orientation and therefore requires less installation space.

[0055] A device for assembling a stack component on an electrochemical partial stack is provided, wherein the stack component has a first calibration opening and a second calibration opening. The device comprises a base plate for constructing the electrochemical partial stack, a first calibration device and a second calibration device, wherein the first and second calibration devices are arranged at two locations on the base plate for cooperating with corresponding calibration openings of the stack component for assembly. The first calibration device and the second calibration device are arranged to be supplementally adjusted along the construction direction of the electrochemical partial stack in order to calibrate the stack component on the electrochemical partial stack.

[0056] By providing that the first and / or second calibration device is adjusted in a supplementary manner, the device for assembling component stacks can gradually receive component stacks without the quality of the calibration performed with the aid of the calibration device being impaired due to an increase in the height of the electrochemical part stack.

[0057] With a device designed in this way, the first and / or second alignment device can interact with the corresponding alignment opening so that, when assembling the stack, an alignment, in particular a local alignment, of the stack components relative to one another is achieved.

[0058] Such a first and / or second calibration device can extend in an elongated manner and be arranged to pass through the electrochemical partial stack of the stack at the calibration opening. A device can be arranged at the lower end of the respective calibration device, which supplements the adjustment of the calibration device.

[0059] The material of the corresponding calibration device can be metal, in particular stainless steel, or also plastic, such as PEEK or Teflon.

[0060] In order to receive the corresponding stacked components for reliable alignment, the front end of the corresponding alignment device can have, for example, a conical, parabolic, pointed cone, semicircular or elliptical shape. This advantageously results in that the front end can assume the function of a threading aid or alignment support by means of a large insertion bevel at the front end or upper end of the corresponding alignment device.

[0061] By providing each of the stacking parts with a first and a second calibration opening, which cooperate with a first and a second calibration device of an apparatus for assembling the stacking parts for calibration, the first calibration opening can cooperate with the first calibration device to position the stacking parts, and the second calibration opening can be arranged to cooperate with the second calibration device so that the stacking parts are oriented accordingly.

[0062] The proposed method allows positioning deviations between individual electrochemical cells or between individual bipolar plates to be kept small in that the first calibration opening can be implemented as a rotationally symmetrical hole and the second calibration opening can be implemented as a slot that is oriented in the direction of the rotationally symmetrical hole, as has already been implemented in the method described above.

[0063] The first calibration device can be designed, for example, as a round pin, which interacts with a first rotationally symmetrical calibration opening to achieve the most accurate possible positioning of the first stacking part. By means of a second calibration opening in the form of a slot, the corresponding stacking part can be oriented about this determined position by rotation. The second calibration device can have a rotationally symmetrical shape or also a shape that matches the slot. Thus, with this method, tolerances in the dimensions of the stacking parts can also be compensated and, despite this, an exact calibration of the stacking parts relative to one another can still be achieved.

[0064] According to one aspect, it is proposed that the first calibration opening and the second calibration opening of not only the first stack component but also a plurality of upper stack components of the electrochemical partial stack interact with the first and / or second calibration device by means of a first clearance fit in order to locally calibrate the stack components on the electrochemical partial stack. Furthermore, the first calibration device and the second calibration device interact with the first calibration opening and the second calibration opening of other stack components of the electrochemical partial stack by means of a second clearance fit, wherein the dimensions of the first clearance fit are narrower than the dimensions of the second clearance fit.

[0065] In particular, a small first clearance fit can achieve particularly good alignment of the stack components relative to one another during assembly of the stack components. This applies in particular to stack components that are stacked one on top of the other and that interact with the first or second alignment opening of the respective stack component at a certain time or in a certain position of the first or second alignment device.

[0066] In other words, the respective calibration device can have a tapering below the calibration region, so that a first clearance fit only acts between the respective calibration device and the corresponding calibration opening in the calibration region, and a second clearance fit between the respective calibration device and the corresponding calibration opening is present in the lower tapered region. This allows a local calibration of the respective stack components only within the calibration region, and due to the tapering in the lower region of the calibration device, the calibration device can be removed from the electrochemical cell stack after the assembly of the electrochemical cell stack is completed without damaging the stack components. Such a calibration device can, for example, have a diameter of 8 mm in the calibration region and a diameter of 6 mm in the lower region.

[0067] According to one aspect, it is proposed that the first and / or the second calibration device is designed to be removed from the electrochemical component stack along the construction direction of the electrochemical component stack.

[0068] This can be achieved in particular by the following manner: the first and / or second calibration device has a larger diameter in a first area, the calibration area, in which the first and / or second calibration device interacts with a first or second calibration opening of the stack part for assembly, for example by a corresponding first clearance fit, for local calibration than in a second area of ​​the respective calibration device, which passes through a corresponding calibration opening of a stack part of the electrochemical partial stack situated therebelow.

[0069] This makes it possible for stack components of the electrochemical partial stack located underneath to not be damaged when the respective calibration device is removed.

[0070] According to one aspect, it is provided that the first and / or the second calibration device is provided for supplementary adjustment in the building direction of the electrochemical partial stack by means of an electrically driven feed device.

[0071] By means of an electric drive of a corresponding calibration device, the assembly of the stack components on the corresponding electrochemical partial stack can be automated.

[0072] According to one aspect, it is proposed that the device has an overall calibration device which is arranged outside the electrochemical partial stack in order to assemble the first and / or second stack component.

[0073] As already explained above, a stable orientation of the entire electrochemical cell stack can be achieved by means of a general alignment device arranged outside the electrochemical partial stack, since there are no restrictions on the size of such a general alignment device outside the electrochemical partial stack. Thus, the stack components can be locally aligned using the first and second alignment devices, respectively, and the entire electrochemical partial stack can be aligned and oriented using the general alignment device.

[0074] A use of a device as described above for building an electrochemical cell stack is proposed.

[0075] In the case of assembling a stack component on an electrochemical partial stack using the above-described apparatus, the above-described advantages described for the method and the apparatus can be achieved.

[0076] It should be noted that "comprising" does not exclude other elements and "one" does not exclude a plurality. In addition, it should be noted that features described with reference to one of the above exemplary embodiments can also be used in combination with other features of other exemplary embodiments described above. Reference numerals in the claims should not be considered as limitations. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] The embodiments of the present invention refer to Figures 1 to 2 The invention is shown and explained in detail and is intended to provide a better understanding of the invention.

[0078] The accompanying drawings show:

[0079] Figure 1 A schematic diagram of an apparatus for assembling stack components of an electrochemical partial stack; and

[0080] Figure 2 Schematic cross section of a device for assembling stack components of an electrochemical partial stack.

[0081] In the drawings, the same or similar components are denoted by the same or similar reference numerals, wherein repeated description of these components is omitted in individual cases. DETAILED DESCRIPTION

[0082] Figure 1 A device 100 for assembling a stack component 140 on an electrochemical partial stack is schematically shown, wherein the stack component 140 has a first calibration opening 115 and a second calibration opening 125. The electrochemical partial stack is stacked on a substrate 145 for constructing the electrochemical partial stack, and when assembled on the electrochemical partial stack, the stack component 140 can be calibrated by means of a first calibration device 110 and a second calibration device 120. Here, the first calibration device 110 and the second calibration device 120 are arranged at two locations on the substrate 145 for cooperating with the corresponding calibration openings 115, 125 of the stack component 140 during assembly for local calibration. The first calibration device 110 and the second calibration device 120 are arranged here to be supplementally adjusted along the construction direction of the electrochemical partial stack in order to calibrate the stack component 140 on the electrochemical partial stack.

[0083] In this case, first calibration openings 115 and second calibration openings 125 of both first and second stack elements 140 and of a plurality of upper stack elements of the electrochemical partial stack interact with first and / or second calibration devices 110 , 120 by means of a first clearance fit in order to locally calibrate stack elements 140 on the electrochemical partial stack.

[0084] The first calibration device 110 and the second calibration device 120 interact with the first calibration opening 115 and the second calibration opening 125 of the other stack part 140 of the electrochemical partial stack located below the first stack part 140 by means of a second clearance fit. Here, the size of the first clearance fit is narrower than the size of the second clearance fit. In other words, the first and / or second calibration device 110, 120 has two regions with different diameters, wherein the respective calibration device 110, 120 has a larger diameter in its upper end 111 in the construction direction, in the calibration region, than in the lower part 112, so that only the upper part 111 of the respective calibration device 110, 120 interacts locally with the respective calibration opening 115, 125 in order to calibrate the respective stack part 140.

[0085] exist Figure 2 The schematic diagram shows the Figure 1 A cross-section 200 of an apparatus 100 for assembling a stack of components 140 for calibration devices 110, 120. Here, in addition to the above-mentioned elements of the apparatus 100, a positioning device 240 can be seen inside the base plate 145 of the apparatus 100, 200, which has a suitable fit between its inner diameter and the outer diameter of the wider part 111 of the respective calibration device 110, 120, so that the calibration device 110 is positioned in a position where the wider part 111 of the calibration device 110 engages with the opening of the positioning device 240.

[0086] It can be seen that the calibration device 110 only cooperates with a plurality of stack components arranged in the upper part of the electrochemical partial stack in order to locally calibrate these stack components, and the second part 112 of the calibration device 110 has a smaller diameter, so that the clearance fit in this area 112 is loose, so that effective local calibration of the stack component 140 is not performed.

[0087] Furthermore, it can be seen how the first calibration device 110 can be provided for additional adjustment in the building direction of the electrochemical partial stack, for example by an electrically driven feed device moving the coupling element 250 in the direction of the arrow shown. Furthermore, it can be seen how the coupling element 250 is provided to cooperate with a part of the calibration device 110 so that the calibration device 110 can be removed from the electrochemical partial stack in the building direction of the electrochemical partial stack by mechanically removing it from the coupling device 250 in the building direction.

Claims

1. A method for assembling an electrochemical cell stack, comprising the steps of: A first stack component (140) having a first calibration opening (115) is assembled onto the electrochemical partial stack by means of the cooperation of the first calibration opening (115) and a first calibration device (110); and The first calibration device (110) is additionally adjusted along the construction direction of the electrochemical partial stack for locally calibrated assembly of a second stack component, the second stack component having a corresponding first calibration opening for locally calibrated assembly, The first calibration device (110) only interacts with a plurality of stack components arranged in the upper part of the electrochemical component stack to locally calibrate the plurality of stack components, and no effective local calibration of the stack components is performed in the lower part of the electrochemical component stack.

2. The method according to claim 1, wherein: The first stacking part (140) and the second stacking part each have a corresponding second calibration opening (125) and are mounted on the electrochemical partial stack in a partially calibrated manner by means of a second calibration device (120), wherein the second calibration device (120) is supplementally adjusted in the construction direction of the electrochemical partial stack for mounting the second stacking part. The second calibration device (120) only interacts with a plurality of stack components arranged in the upper part of the electrochemical component stack to locally calibrate the plurality of stack components, and no effective local calibration of the stack components is performed in the lower part of the electrochemical component stack.

3. The method according to claim 1 or 2, wherein: The first stack component (140) and / or the second stack component are assembled by means of an overall calibration device (130) arranged outside the electrochemical component stack in order to achieve an overall calibration of the electrochemical component stack.

4. The method according to claim 2, wherein: During assembly, the first stack element (140) and / or the second stack element is positioned with the first calibrated opening (115) and oriented with the second calibrated opening (125).

5. The method according to claim 2, wherein: During assembly of the first stack of components (140) and / or the second stack of components, the respective calibration device (110, 120) and the respective calibration opening (115, 125) are dimensioned with a first clearance fit.

6. The method according to claim 5, wherein: When assembling the first stacking component (140) and / or the second stacking component, a second clearance fit exists between the corresponding calibration devices (110, 120) and the corresponding calibration openings (115, 125) of multiple stacking components of the electrochemical partial stack below the first stacking component (140), and the size of the first clearance fit is narrower than the second clearance fit.

7. The method according to claim 2, wherein: The first calibration device (110) and / or the second calibration device (120) are positioned for calibration via a positioning device (240) and / or via corresponding calibration openings (115, 125) of a plurality of stack components assembled one above the other of the electrochemical part stack.

8. The method according to claim 2, wherein: After assembling the first stack component (140) or the second stack component, the first calibration device (110) and / or the second calibration device (120) is removed from the electrochemical stack of components in the construction direction of the electrochemical stack of components.

9. An electrochemical stack, the stacked components of which are assembled according to the method according to any one of claims 1 to 8.

10. A device (100, 200) for assembling a stack component on an electrochemical partial stack, wherein: The stacking component has a first calibrated opening (115) and a second calibrated opening (125), and the device has: A substrate (145) for constructing an electrochemical partial stack; A first calibration device (110); and A second calibration device (120), wherein the first calibration device (110) and the second calibration device (120) are arranged at two positions on the substrate (145) for cooperating with corresponding calibration openings (115, 125) of the first stacking component (140) for local calibration assembly; wherein the first calibration device (110) and the second calibration device (120) are arranged to be supplementarily adjusted along the construction direction of the electrochemical part stack so as to calibrate the second stacking component on the electrochemical part stack, The first calibration device (110) and the second calibration device (120) only cooperate with a plurality of stack components arranged in the upper part of the electrochemical partial stack to locally calibrate the plurality of stack components, and no effective local calibration of the stack components is performed in the lower part of the electrochemical partial stack.

11. The device (100, 200) according to claim 10, wherein The first calibration opening (115) and the second calibration opening (125) of not only the first stacking component (140) but also a plurality of upper stacking components of the electrochemical partial stack interact with the first calibration device (110) and / or the second calibration device (120) by means of a first clearance fit in order to calibrate the stacking components on the electrochemical partial stack; and The first calibration device (110) and the second calibration device (120) cooperate with a first calibration opening (115) and a second calibration opening (125) of other stack components of the electrochemical partial stack by means of a second clearance fit, wherein the size of the first clearance fit is narrower than the size of the second clearance fit.

12. The device (100, 200) according to claim 10 or 11, wherein: The first calibration device (110) and / or the second calibration device (120) are arranged to be removed from the electrochemical component stack along a construction direction of the electrochemical component stack.

13. The device (100, 200) according to claim 10 or 11, wherein: The first calibration device (110) and / or the second calibration device (120) are arranged to be adjusted in a supplementary manner along the building direction of the electrochemical partial stack by means of an electrically driven feed device.

14. The device (100, 200) according to claim 10 or 11, comprising an overall calibration device (130) arranged outside the electrochemical partial stack in order to assemble the first stack component (140) and / or the second stack component.

15. Use of the device (100, 200) according to any one of claims 10 to 14 for building an electrochemical cell stack.

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