DE102014106491A1 - Interconnector element and method for producing an interconnector element - Google Patents

Abstract

In order to provide an interconnector element for an electrochemical transducer, by means of which a cell stack of an electrochemical transducer can be produced simply and inexpensively, it is proposed that the interconnector element comprises a flat metallic base body, which comprises an edge region and a fluid guide region arranged within the edge region, wherein the main body is designed so symmetrical that a plurality of identically designed interconnector elements are stackable in at least two different Drehausrichtungen so that the fluid guide portions of the stacked in the at least two different Drehausrichtungen interconnector elements are arranged perpendicular to a stacking direction offset from each other, while the respective edge regions of the stacked interconnector elements in each of the at least two different Drehausrichtungen in the stacking direction linear überei are arranged one above the other.

Description

The present invention relates to an interconnector element for an electrochemical transducer.

Interconnector elements, which are also referred to as bipolar plates are, for example, from DE 10 2005 022 894 A1 or from the DE 10 2008 036 848 A1 known.

The present invention has for its object to provide an interconnector element by means of which a cell stack of an electrochemical transducer is simple and inexpensive to produce.

This object is achieved by an interconnector element for an electrochemical converter, which comprises a flat metallic base body comprising an edge region and disposed within the edge region fluid guide region, wherein the base body is formed symmetrically such that a plurality of identically designed interconnector elements in at least two different Drehausrichtungen stackable with each other so that the fluid-guiding regions of the interconnector elements stacked in the at least two different rotational orientations are offset from each other perpendicular to a stacking direction, while the respective edge regions of the interconnected interconnector elements are linearly stacked in each of the at least two different rotational orientations in the stacking direction.

Because the interconnector element according to the invention enables stacking in at least two different rotational orientations, a plurality of identically designed interconnector elements can be used to form a simple and inexpensive cell stack. In particular, the use of several different types of interconnector elements is then preferably unnecessary.

It may be advantageous if the interconnector element is designed in such a way that it can be arranged in two different rotational orientations upon rotation through approximately 180 °, in particular about a central axis of the base body.

In one embodiment of the invention, it is provided that the base body is formed symmetrically about a central axis of the base body oriented parallel to a stacking direction such that a plurality of identically designed interconnector elements can be stacked on each other in at least two different rotational orientations, such that the fluid guide areas in the at least two different Drehausrichtungen stacked interconnector elements are arranged perpendicular to the stacking direction offset from one another, while the respective edge regions of the stacked interconnector elements in each of the at least two different Drehausrichtungen in the stacking direction are arranged linearly one above the other.

It may be favorable if the fluid-guiding region is designed mirror-symmetrically to a mirror plane which preferably runs parallel to the stacking direction.

The mirror plane is preferably arranged offset parallel to a central axis of the base body.

The fluid guide region is preferably wave-shaped. In particular, it can be provided that the fluid guide area is wave-shaped and that the base body is formed symmetrically such that a plurality of identically designed interconnector elements are stackable in two different Drehausrichtungen so that the fluid guide portions of the stacked in the two different Drehausrichtungen interconnector elements perpendicular to the stacking direction are offset by at least approximately half a wavelength offset from each other.

It may be favorable if the fluid guide region comprises a plurality of mutually parallel fluid channels, which are arranged and / or formed in particular on an upper side of the base body and / or on an underside of the base body.

The fluid channels are formed in particular by depressions and elevations of the fluid guide region.

In particular, when the fluid guide region is wave-shaped, due to the wave shape depressions and elevations result, through which fluid channels are formed on the upper side of the base body and fluid channels on the lower side of the base body.

It may be advantageous if the main body is a sheet metal working product.

In particular, it can be provided that the base body is a sheet metal stamping product, a sheet metal bending product and / or a stamped sheet metal product.

In one embodiment of the invention, it is provided that the base body has an at least approximately uniform material thickness.

In particular, it can be provided that the base body is formed by machining a metal sheet with a uniform material thickness.

By processing the metal sheet to form the base body of the interconnector element, slight deviations in the uniform material thickness may result.

The deviation from the average material thickness of the main body over the entire main body is preferably at most approximately 50%, in particular at most approximately 20%.

It can be advantageous if the base body comprises fluid passages which are mirror-symmetrical with respect to a plane of symmetry of the edge region, mirror-symmetrical with respect to a mirror plane of the fluid guide region and / or mirror-symmetrical with respect to a central axis of the base body.

The plane of symmetry of the edge region is preferably arranged at least approximately perpendicular to the mirror plane of the fluid guide region.

The plane of symmetry of the edge region is furthermore preferably arranged parallel to the central axis of the base body.

In particular, it may be provided that the central axis of the base body extends in at least one plane of symmetry of the edge region.

The mirror plane of the fluid guide region preferably runs parallel to the central axis of the main body and is spaced therefrom.

Preferably, the plane of symmetry of the edge region is parallel to the stacking direction.

Furthermore, the mirror plane of the fluid guide region is preferably parallel to the stacking direction.

The central axis of the main body is preferably parallel to the stacking direction.

In one embodiment of the invention it is provided that the main body comprises two groups and / or rows of fluid passages.

The two groups and / or rows of fluid passages are preferably arranged on opposite sides of the fluid guide region.

In particular, it can be provided that the two groups and / or rows of fluid passages are arranged and / or formed with mirror symmetry relative to one another with respect to the plane of symmetry of the edge region.

It may be advantageous if two rows of fluid passages are arranged and / or aligned essentially parallel to one another.

In the assembled state of the interconnector element, the fluid passages are preferably connected in a fluid-effective manner to the fluid-guiding region.

In particular, it can be provided that the two groups and / or rows of fluid passages in the assembled state of the interconnector element are fluidically connected to each other by means of the fluid guide region.

In one embodiment of the invention, it is provided that the fluid guide region comprises upper abutment surfaces arranged on an upper side of the main body and lower abutment surfaces arranged on an underside of the main body. The upper contact surfaces and the lower contact surfaces of the interconnector element are preferably arranged offset in a direction perpendicular to the stacking direction.

In particular, it can be provided that the upper contact surfaces are formed by wave peaks and the lower contact surfaces by wave troughs of the wave-shaped fluid guide region.

The contact surfaces preferably extend substantially linearly and / or parallel to one another and / or parallel to the fluid channels of the fluid-guiding region.

It may be favorable if the base body is designed to be symmetrical such that a plurality of identically designed interconnector elements can be stacked on top of one another in two different rotational orientations, such that the upper contact surfaces of an interconnector element and the lower contact surfaces of a further interconnector element stacked on this interconnector element succeed each other in the stacking direction and in particular not are offset from one another perpendicular to the stacking direction.

The present invention further relates to an adapter element for arrangement on or between one or more interconnector elements, in particular on or between one or more interconnector elements according to the invention.

Such an adapter element preferably comprises a flat metallic base body which comprises a central region and an edge region surrounding the central region.

The adapter element preferably also has one or more of the features and / or advantages described in connection with the interconnector element according to the invention.

In particular, it can be provided that the adapter element is a sheet metal working product.

In particular, the adapter element can be stacked together with a plurality of interconnector elements such that the edge regions of the interconnector elements and the edge region of the adapter element are arranged linearly one above the other in the stacking direction.

It can be advantageous if the edge region comprises one or more fluid adapters, by means of which fluid passages of two interconnector elements adjoining the adapter element can be fluidly connected to one another.

By means of the adapter element in particular two arranged in different Drehausrichtungen interconnector elements can be fluidly interconnected.

For example, by means of an adapter element, a targeted connection of fuel channels, oxidator channels and / or exhaust channels of the interconnector elements can be made possible.

It may be favorable if the central region of the adapter element is a receiving region for receiving an electrochemically active element of an electrochemical transducer.

The interconnector element according to the invention and / or the adapter element according to the invention are particularly suitable for use in a cell stack for an electrochemical transducer.

The present invention therefore also relates to a cell stack for an electrochemical converter which comprises a plurality of interconnector elements, in particular interconnector elements according to the invention, and / or a plurality of adapter elements, in particular adapter elements according to the invention.

The cell stack according to the invention preferably has one or more of the features and / or advantages described in connection with the interconnector element and / or the adapter element.

It may be favorable if an individual cell of the cell stack comprises one or two interconnector elements and / or one or two adapter elements.

The present invention further relates to a method for producing an interconnector element.

The invention is in this respect the task of providing a method by means of which interconnector elements for easy production of a cell stack of an electrochemical transducer are simple and inexpensive to produce.

This object is achieved according to the invention by a method for producing an interconnector element, which comprises:
Providing a flat metallic base body, in particular a metal sheet;
Machining, in particular embossing, bending and / or punching, of the base body to form an edge region and a fluid guide region such that the base body is symmetrical such that a plurality of identically designed interconnector elements can be stacked on one another in at least two different rotational orientations, such that the fluid guide regions are stacked in one another at least two different Drehausrichtungen stacked interconnector elements are arranged perpendicular to a stacking direction offset from each other, while the respective edge regions of the stacked interconnector elements in each of the at least two different Drehausrichtungen in the stacking direction are arranged linearly one above the other.

The method according to the invention preferably has one or more of the features and / or advantages described in connection with the interconnector element, the adapter element and / or the cell stack.

In particular, a cell stack can be produced by means of the interconnector elements.

The invention therefore also relates to a method for producing a cell stack, in particular a cell stack according to the invention.

Preferably, the method according to the invention comprises the following:
Providing a plurality of identically formed interconnect elements;
Stacking of the interconnector elements to each other such that edge regions of the interconnector elements in a stacking direction sequentially are arranged and that fluid guide areas of successive interconnector elements are arranged offset from one another perpendicular to the stacking direction.

The method according to the invention for producing a cell stack preferably has one or more of the features and / or advantages described in connection with the interconnector element, the adapter element, the cell stack or the further method.

Furthermore, according to the invention, one or more of the following described features and / or advantages may be provided:
The fluid guide region of the interconnector element preferably comprises a plurality of mutually parallel fluid guide channels, which are formed by a wave structure of the base body, wherein the wave structure is arranged relative to the edge region, that this by a rotation of the interconnector element by 180 ° about a central axis of the base body with an offset of half a wavelength can be imaged on itself.

The edge region of the basic body is imaged onto itself by a rotation through 180 ° around a central axis of the basic body, preferably without offset.

The stacking direction is preferably perpendicular to a flow direction (fluid guiding direction) of fluid channels of the fluid guiding region.

An interconnector element is in particular a connecting element between two electrochemically active elements of an electrochemical transducer.

An interconnector element is in particular a bipolar element.

In particular, when the interconnector element is substantially plate-shaped, the interconnector element is preferably an interconnector plate or a bipolar plate.

It can be advantageous if the electrochemical converter is designed as a fuel cell device, for example as a solid oxide fuel cell device (SOFC) or as a polymer electrolyte fuel cell device (PEFC).

Furthermore, it can be advantageous if the electrochemical converter is designed as an electrolysis device, for example as a high-temperature electrolyser cell (SOEC) or as a low-temperature electrolysis device.

By means of the interconnector element is preferably a uniform media supply (gas supply) in one or two cells of the electrochemical transducer allows and / or guaranteed.

A cell stack preferably comprises a plurality of interconnector elements, wherein two interconnector elements arranged adjacent to one another are preferably aligned rotated by approximately 180 ° with respect to one another.

The identically formed interconnector elements are thus preferably arranged alternately in two different Drehausrichtungen.

The adapter element is preferably an adapter plate.

The adapter element may preferably allow flow control. In particular, the adapter element can for this purpose have flow channels, baffles and / or fluid passages with different hole diameters.

Furthermore, the adapter element can preferably be used for height adjustment in the cell stack (stack), in particular by using different sheet thicknesses or Kröpfhöhen.

Furthermore, the adapter element can enable a support function and / or path limitation in the stacking direction (Z direction), in particular for reliable transmission of a sealing force into all stack levels.

It can also be provided that the adapter element acts as a so-called window plate (receiving area for receiving an electrochemically active element). The adapter element can serve in particular for fixing an electrochemically active cell or membrane.

According to the invention, in particular a production and logistics effort can be reduced. In particular, the use of two differently designed and / or manufactured interconnector elements can be avoided. Undesirable component mix-ups in the production of a cell stack can thereby be effectively avoided.

Further preferred features and / or advantages of the invention are the subject of following description and the drawings of exemplary embodiments.

In the drawings show:

1 a schematic perspective view of a cell stack of an electrochemical transducer, in which a plurality of interconnector elements are provided;

2 a schematic plan view of an interconnector element of the cell stack 1 ;

3 a schematic vertical section through the cell stack 1 ;

4 one of the 2 corresponding schematic plan view of an alternative embodiment of an interconnector element, in which asymmetrically formed groups of fluid passages are provided;

5 one of the 2 corresponding schematic plan view of a further alternative embodiment of an interconnector element, in which two groups of identically designed fluid passages are provided;

6 one of the 2 corresponding schematic plan view of a further alternative embodiment of an interconnector element, in which variable fluid passage areas are provided; and

7 one of the 2 corresponding schematic plan view of an adapter element for one or more interconnector elements and / or for receiving an electrochemically active element.

Identical or functionally equivalent elements are provided with the same reference numerals in all figures.

One in the 1 to 3 illustrated embodiment of a whole with 100 designated interconnector element finds in particular in a cell stack 102 an electrochemical transducer 104 Use.

The interconnector element 100 serves in particular the electrical connection of two adjacent electrochemically active cells (single cells) of the electrochemical transducer 104 ,

The interconnector element 100 For example, a bipolar plate is a fuel cell device 106 trained electrochemical transducer 104 ,

In particular 3 it can be seen in a cell stack 102 in particular a plurality of interconnector elements 100 stacked on top of each other and / or stacked on top of each other.

The interconnector elements 100 are in particular in a stacking direction 108 arranged consecutively.

The interconnector elements 100 are used in addition to the electrical contacting of electrochemically active elements 110 of the electrochemical transducer 104 furthermore, the targeted medium guidance (gas guidance) within the cell stack 102 ,

By means of the interconnector elements 100 For this purpose, several fluid channels 112 formed, which are aligned in particular parallel to each other.

The fluid channels 112 are also perpendicular to the stacking direction 108 aligned.

Each interconnector element 100 includes a main body 114 , which is formed for example of a flat and metallic material.

For example, the main body 114 formed from a sheet metal.

The main body 114 is in particular a sheet metal working product 116 , For example, a sheet metal stamped product 118 , a sheet metal bending product 120 and / or a sheet metal stamping product 122 ,

Due to the design of the body 114 as a sheet metal working product 116 indicates the basic body 114 preferably a substantially uniform material thickness M.

The main body 114 includes a centrally located fluid guide area 124 and one the fluid guide area 124 surrounding edge area 126 ,

The fluid guide area 124 is wavy.

Due to the waveform arise both on an upper side 128 of the basic body 114 as well as at a bottom 130 of the basic body 114 Elevations and depressions through which the fluid channels 112 are formed.

The fluid channels 112 at the top 128 and the fluid channels 112 on the bottom 130 are perpendicular to the stacking direction 108 staggered to each other.

In particular, the fluid channels 112 due to the waveform of the fluid guide area 124 arranged alternately, so that perpendicular to the stacking direction 108 alternately one after the other in each case a fluid channel 112 at the top 128 and subsequently each a fluid channel 112 on the bottom 130 of the basic body 114 are provided.

Due to the waveform of the fluid guide area 124 arise upper contact surfaces 132 of the basic body 114 at the top 128 ,

In addition, lower contact surfaces arise 134 of the basic body 114 at the bottom 130 ,

The upper contact surfaces 132 and the lower contact surfaces 134 are essentially linearly extending areas, with which the main body 114 in the fluid guide area 124 on the elements to be supplied with media, in particular electrochemically active elements 110 , the electrochemical transducer 104 is applied.

In particular 3 can be seen, are the interconnector elements 100 formed and / or arranged in the illustrated embodiment, that adjacent to each other arranged interconnector elements 100 perpendicular to the stacking direction 108 staggered fluid guide areas 124 exhibit.

The fluid guide areas 124 of adjacently arranged interconnector elements 100 are offset from one another in such a way that on an upper contact surface 132 an interconnector element 100 in the stacking direction 108 a lower contact surface 134 the further interconnector element 100 borders.

A force transmission between adjacently arranged interconnector elements 100 thus takes place substantially parallel to the stacking direction 108 ,

One between two interconnector elements 100 arranged element, in particular an electrochemically active element 110 , This is mechanically only slightly charged.

In addition, this can be a particularly large area of between two interconnector elements 100 arranged element, in particular of the electrochemically active element 110 , be supplied with media on both sides.

In particular 3 can be seen, is an offset of the upper contact surfaces 132 to the lower contact surfaces 134 and accordingly, the offset of the fluid guide areas 124 of adjacently arranged interconnector elements 100 about half a wavelength (λ (lambda) / 2).

The described offset of the fluid guide areas 124 of adjacently arranged interconnector elements 100 For example, by using differently designed interconnector elements 100 will be realized.

In the in the 1 to 3 However, the illustrated embodiment is a single type of interconnector elements 100 intended.

This interconnector element 100 has a base body 114 on, which can be arranged and stacked in two different Drehausrichtungen.

The interconnector element 100 includes a border area for this purpose 126 , which upon rotation of the interconnector element 100 around a central axis 136 of the basic body 114 in two Drehausrichtungen without offset on itself is mapped.

The central axis 136 is in particular parallel to the stacking direction 108 ,

The border area 126 is in particular by a rotation through 180 ° about the central axis 136 can be mapped onto itself without being offset.

Several identical interconnector elements 100 can thus be stacked in two Drehausrichtungen each other, so that the edge areas 126 of consecutively arranged interconnect elements 100 linear along the stacking direction 108 consecutive.

The fluid guide area 124 of the interconnector element 100 is perpendicular to the stacking direction 108 and perpendicular to the fluid guiding direction 138 in the fluid channels 112 offset to the central axis 136 arranged.

In particular, the fluid guide area 124 by a quarter wavelength (λ (lambda) / 4) offset to the central axis 136 arranged so that upon rotation of the interconnector element 100 around the central axis 136 180 ° the fluid guide area 124 by a total of half a wavelength (λ (lambda) / 2) is displaceable.

By alternating arrangement of the interconnector elements 100 in the cell stack 102 such that two consecutive interconnect elements 100 are arranged in two rotated by 180 ° Drehausrichtungen, thus, in 3 illustrated optimized structure of a cell stack 102 be formed.

In particular, this can be an optimized force transmission within the cell stack 102 and an optimized media supply of the electrochemically active elements 110 be enabled.

In particular 2 can be seen, includes the main body 114 of the interconnector element 100 several fluid passages 140 ,

The fluid ducts 140 especially in two groups 142 or rows 144 on opposite sides of the fluid guide area 124 arranged and / or trained.

In the in the 1 to 3 illustrated embodiment of the interconnector element 100 are, for example, seven fluid passages 140 in each of the two groups 142 or rows 144 intended.

The fluid ducts 140 are with respect to a plane of symmetry 146 of the border area 126 of the basic body 114 arranged mirror-symmetrically to each other and / or formed (see 2 ).

By means of the fluid guide region 124 are the groups 142 or rows 144 of fluid ducts 140 in the assembled state of the interconnector element 100 fluidly connected with each other.

In the in the 1 to 3 illustrated embodiment of the interconnector element 100 are differently dimensioned and / or formed fluid ducts 140 intended.

As 2 it can also be seen, the central axis runs 136 of the interconnector element 100 in the plane of symmetry 146 of the border area 126 ,

The symmetry plane 146 is also preferably at the same time the plane of symmetry 146 the two groups 142 or rows 144 of fluid ducts 140 ,

The fluid guide area 124 preferably comprises one parallel to the central axis 136 extending mirror plane 148 ,

The mirror plane 148 is preferably offset by a quarter wavelength (λ (lambda) / 4) to the central axis 136 arranged to the above-described offset of the fluid guide area 124 with rotated arrangement of the interconnector element 100 to enable.

Due to the offset fluid guide region 124 arise different distances D ₁ and D _{2 of} the fluid guide area 124 from the edge area 126 ,

In particular, the distance D ₂ is a quarter of a wavelength (λ (lambda) / 4) smaller than the distance D ₁ .

An in 4 illustrated alternative embodiment of an interconnector element 100 is different from the one in the 1 to 3 illustrated first embodiment essentially in that the two groups 142 or rows 144 of fluid ducts 140 not symmetrical with respect to the plane of symmetry 146 of the border area 126 of the basic body 114 are formed and / or arranged.

In a stacking of such interconnector elements 100 Consequently, problems with the correct fluid guidance can result in different rotational orientations.

By means of a with regard to the 7 described adapter element can be remedied in this regard, however.

Incidentally, the in 4 illustrated embodiment of an interconnector element 100 in terms of structure and function with in the 1 to 3 illustrated first embodiment, so that reference is made to the above description in this respect.

An in 5 illustrated further alternative embodiment of an interconnector element 100 is different from the one in the 1 to 3 illustrated first embodiment essentially in that all fluid passages 140 are identically formed and / or dimensioned.

A stack of such interconnector elements 100 in different Drehausrichtungen is therefore preferably possible without affecting the fluid management. The use of adapter elements (to be described later) can preferably be dispensed with here.

Incidentally, the in 5 illustrated embodiment of the interconnector element 100 in terms of structure and function with in the 1 to 3 illustrated embodiment, so that reference is made to the above description in this respect.

An in 6 illustrated further alternative embodiment of an interconnector element 100 is different from the one in the 1 to 3 illustrated embodiment essentially in that instead of individual fluid passages 140 Feed-through areas 150 are provided. These fluid passage areas 150 may preferably be arbitrary with fluid feedthroughs 140 be provided. In particular, you can additional fluid adapter, in particular fluid adapter to be described later adapter elements, be provided.

Incidentally, the in 6 illustrated alternative embodiment of an interconnector element 100 in terms of structure and function with in the 1 to 3 illustrated embodiment, so that reference is made to the above description in this respect.

In 7 is an adapter element 152 in particular, for the targeted fluid-effective connection of two interconnector elements 100 in a cell stack 102 an electrochemical transducer 104 is usable.

This in 7 illustrated adapter element 152 For this purpose, in particular comprises one or more fluid adapters 154 , by means of which the fluid passages 140 from adjacent interconnect elements 100 can be selectively connected with each other.

Furthermore, the adapter element comprises 152 preferably a central receiving area 156 ,

By means of this recording area 156 is in particular an electrochemically active element 110 received.

The adapter element 152 further comprises a border area 126 which is in particular identical to the edge region 126 of the interconnector element 100 is trained.

The adapter element 152 is thus in particular together with several interconnector elements 100 in the stacking direction 108 stackable.

By means of the adapter element 152 can in addition to the targeted fluid management between adjacent interconnector elements 100 In addition, functions such as a height adjustment in the cell stack 102 and / or a support function for transmitting a sealing force can be realized.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102005022894 A1 [0002]
• DE 102008036848 A1 [0002]

Claims (20)

Interconnector element ( 100 ) for an electrochemical converter ( 104 ) comprising a flat metallic base body ( 114 ), which has a border area ( 126 ) and one within the border area ( 126 ) arranged fluid guide area ( 124 ), wherein the basic body ( 114 ) is formed symmetrically such that a plurality of identically designed interconnector elements ( 100 ) can be stacked on one another in at least two different rotational orientations, so that the fluid-guiding regions ( 124 ) of the interconnector elements stacked in the at least two different rotational orientations ( 100 ) perpendicular to a stacking direction ( 108 ) are offset relative to each other, while the respective edge regions ( 126 ) of the stacked interconnect elements ( 100 ) in each of the at least two different Drehausrichtungen in the stacking direction ( 108 ) are arranged linearly one above the other. Interconnector element ( 100 ) according to claim 1, characterized in that the basic body ( 114 ) so symmetrically about a parallel to a stacking direction ( 108 ) aligned central axis ( 136 ) of the basic body ( 114 ) is formed such that a plurality of identically formed interconnector elements ( 100 ) can be stacked on one another in at least two different rotational orientations, so that the fluid-guiding regions ( 124 ) of the interconnector elements stacked in the at least two different rotational orientations ( 100 ) perpendicular to the stacking direction ( 108 ) are offset relative to each other, while the respective edge regions ( 126 ) of the stacked interconnect elements ( 100 ) in each of the at least two different Drehausrichtungen in the stacking direction ( 108 ) are arranged linearly one above the other. Interconnector element ( 100 ) according to one of claims 1 or 2, characterized in that the fluid guiding area ( 124 ) mirror-symmetrical to a mirror plane ( 148 ) is formed, which parallel to the stacking direction ( 108 ) runs. Interconnector element ( 100 ) according to claim 3, characterized in that the mirror plane ( 148 ) offset parallel to a central axis ( 136 ) of the basic body ( 114 ) is arranged. Interconnector element ( 100 ) according to one of claims 1 to 4, characterized in that the fluid guiding region ( 124 ) is wave-shaped. Interconnector element ( 100 ) according to one of claims 1 to 5, characterized in that the fluid guiding region ( 124 ) is wave-shaped and that the basic body ( 114 ) is formed symmetrically such that a plurality of identically designed interconnector elements ( 100 ) are stackable in two different Drehausrichtungen so that the fluid guide areas ( 124 ) of the interconnector elements stacked in the two different rotational orientations ( 100 ) perpendicular to the stacking direction ( 108 ) are arranged offset by at least approximately half a wavelength (λ / 2) to each other. Interconnector element ( 100 ) according to one of claims 1 to 6, characterized in that the fluid guiding region ( 124 ) a plurality of mutually parallel fluid channels ( 112 ), which in particular on an upper side ( 128 ) of the basic body ( 114 ) and / or on a lower side ( 130 ) of the basic body ( 114 ) are formed and / or arranged. Interconnector element ( 100 ) according to one of claims 1 to 7, characterized in that the basic body ( 114 ) a sheet metal working product ( 116 ), in particular a sheet metal stamping product ( 118 ) and / or a sheet metal bending product ( 120 ) and / or a sheet metal stamping product ( 122 ) is. Interconnector element ( 100 ) according to one of claims 1 to 8, characterized in that the basic body ( 114 ) has an at least approximately uniform material thickness (M). Interconnector element ( 100 ) according to one of claims 1 to 9, characterized in that the basic body ( 114 ) Fluid passages ( 140 ) which is mirror-symmetrical with respect to a plane of symmetry ( 146 ) of the edge area ( 126 ), mirror-symmetric with respect to a mirror plane ( 148 ) of the fluid guide region ( 124 ) and / or mirror symmetry with respect to a central axis ( 136 ) of the basic body ( 114 ) are formed and / or arranged. Interconnector element ( 100 ) according to one of claims 1 to 10, characterized in that the basic body ( 114 ) two groups ( 142 ) and / or rows ( 144 ) of fluid passages ( 140 ), which on opposite sides of the fluid guide region ( 124 ) are arranged. Interconnector element ( 100 ) according to one of claims 1 to 11, characterized in that the fluid guiding area ( 124 ) on a top side ( 128 ) of the basic body ( 114 ) arranged upper contact surfaces ( 132 ) and on a lower side ( 130 ) of the basic body ( 114 ) arranged lower contact surfaces ( 134 ), wherein the upper abutment surfaces ( 132 ) and the lower contact surfaces ( 134 ) of the interconnector element ( 100 ) in a direction perpendicular to Stacking direction ( 108 ) extending direction are arranged offset from one another. Interconnector element ( 100 ) according to claim 12, characterized in that the basic body ( 114 ) is formed symmetrically such that a plurality of identically designed interconnector elements ( 100 ) are stackable in two different Drehausrichtungen so that the upper contact surfaces ( 132 ) of an interconnector element ( 100 ) and the lower contact surfaces ( 134 ) one on this interconnector element ( 100 ) stacked another interconnector element ( 100 ) in the stacking direction ( 108 ) follow one another. Adapter element ( 152 ) for placement on or between one or more interconnect elements ( 100 ) according to one of claims 1 to 13, wherein the adapter element ( 152 ) a flat metallic body ( 114 ) comprising a central region and an edge region surrounding the central region ( 126 ). Adapter element ( 152 ) according to claim 14, characterized in that the edge region ( 126 ) one or more fluid adapters ( 154 ), by means of which fluid passages ( 140 ) two to the adapter element ( 152 ) of adjacent interconnector elements ( 100 ) are fluidically connectable to each other. Adapter element ( 152 ) according to one of claims 14 or 15, characterized in that the central area is a receiving area ( 156 ) for receiving an electrochemically active element ( 110 ) of an electrochemical transducer ( 104 ). Cell stack ( 102 ) for an electrochemical converter ( 104 ) comprising a plurality of interconnect elements ( 100 ) according to one of claims 1 to 13 and / or a plurality of adapter elements ( 152 ) according to one of claims 14 to 16. Cell stack ( 102 ) according to claim 17, characterized in that a single cell of the cell stack ( 102 ) one or two interconnector elements ( 100 ) and / or one or two adapter elements ( 152 ). Method for producing an interconnector element ( 100 ), in particular an interconnector element ( 100 ) according to one of claims 1 to 13, wherein the method comprises: - providing a flat metallic base body ( 114 ), in particular a metal sheet; Processing, in particular embossing, bending and / or punching, of the basic body ( 114 ) for forming a peripheral area ( 126 ) and a fluid guiding area ( 124 ) such that the basic body ( 114 ) is symmetrical such that a plurality of identically designed interconnector elements ( 100 ) can be stacked on one another in at least two different rotational orientations, so that the fluid-guiding regions ( 124 ) of the interconnector elements stacked in the at least two different rotational orientations ( 100 ) perpendicular to a stacking direction ( 108 ) are offset relative to each other, while the respective edge regions ( 126 ) of the stacked interconnect elements ( 100 ) in each of the at least two different Drehausrichtungen in the stacking direction ( 108 ) are arranged linearly one above the other. Method for producing a cell stack ( 102 ), in particular a cell stack ( 102 ) according to one of claims 17 or 18, the method comprising: - providing a plurality of identically formed interconnect elements ( 100 ); Stacking the interconnector elements ( 100 ) to each other such that edge regions ( 126 ) of the interconnector elements ( 100 ) in a stacking direction ( 108 ) are arranged successively and that fluid guide areas ( 124 ) of successive interconnect elements ( 100 ) perpendicular to the stacking direction ( 108 ) are offset from one another.

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