METHOD FOR FLUIDICALLY CONNECTING FUNCTIONAL MODULES THAT ARE TEMPERATURE-CONTROLLED BY MEANS OF A FLUID, CORRESPONDINGLY TEMPERATURE-CONTROLLED FUNCTIONAL MODULES, AND ASSOCIATED CONNECTION DEVICE

Abstract

A method for fluidically connecting functional modules that are temperature-controlled by a fluid, preferably battery modules, including a) providing the functional modules with at least one line port for directing the fluid in and/or out, at least two functional modules being arranged at a mutual spacing so the line ports are substantially exactly opposite each other and aligned along a first axis and open into a region between the modules, c) incorporating a preassembled connection assembly in the region, the connection assembly having fluid line(s) for feeding and/or discharging the fluid, and at least two fluidic connector pieces which branch off from the fluid line(s) such that the connector pieces are aligned with the line ports along the first axis, and d) modifying a spacing between the connector pieces and/or a length thereof along the first axis such that the connector pieces each fluidically contact one of the line ports.

Claims

1. A method for fluidically connecting functional modules (1) that are temperature-controlled by a fluid, said method comprising the following steps: a) providing the functional modules (1), said functional modules (1) each having at least one line port (2) for directing the fluid at least one of in or out; b) disposing at least two of the functional modules (1) at a mutual spacing such that the respective line ports (2) are disposed so as to be substantially exactly opposite each other and aligned along a first axis (Y) and open into a region (11) between the functional modules (1); c) incorporating an at least partially flexible, preassembled connection assembly (3) in the region (11) between the at least two of the functional modules (1), said connection assembly (3) having at least one fluid line (4, 5) for at least one of feeding or discharging the fluid, and at least two fluidic connector pieces (7) which branch off from the fluid line (4, 5) or each branch off from one of the fluid lines (4, 5) such that the connector pieces (7) are in each case aligned with one of the line ports (2) along the first axis (Y); and d) modifying at least one of a spacing between the connector pieces (7) or a length of the connector pieces (7) along the first axis (Y) such that the connector pieces (7) each fluidically contact one of the line ports (2).

2. The method as claimed in claim 1, wherein the connection assembly (3) is incorporated in the region (11) along a second axis (Z) that is transverse to the first axis (Y).

3. The method as claimed in claim 1, wherein for modifying the at least one of the spacing or the length in step d) there is a spacing modification installation which is activated from outside the region, the activation including a translatory movement along a second axis (Z) that is transverse to the first axis (Y), or a rotating movement about the second axis (Z).

4. The method as claimed in claim 3, wherein in step d) the spacing between the connector pieces (7) is modified by d1) rotating a cam-shaped element (9) disposed between the connector pieces (7) about the second axis (Z) between the connector pieces (7); or d2) inserting a wedge-shaped element (23) along the second axis (Z) between the connector pieces (7); or d3) activating a spacing-modifying gear assembly.

5. The method as claimed in claim 3, wherein in step d) the length of the connector pieces (7) is modified by d4) inserting a length-modifying wedge-shaped element (23) along the second axis (Z) into the region (11) between the functional modules (1); or d5) activating a length-modifying gear assembly; or d6) prior to step c) first compressing the connector pieces (7), and in step d) allowing the connector pieces (7) to relax again.

6. The method as claimed in claim 1, wherein in step d) the length of the connector pieces (7) is plastically modified.

7. The method as claimed in claim 5, further comprising: providing a tool (27) for compressing the connector pieces (7) and for incorporating the connection assembly (3), said tool optionally grips the connection assembly (3); compresses the connector pieces (7); positions the connection assembly (3), including a compensation of tolerances by way of flexible line elements in the connection assembly (3); relaxes the connector pieces (7) and additionally plastically forms the connector pieces (7) when contacting the line ports (2); permits the connector pieces (7) to rebound to a state which, except for inherent stresses and stresses remaining as a result of potential friction of sealing elements, is non-stressed; and optionally releases the connection assembly (3).

8. A connection device (3a) for fluidically connecting functional modules (1) that are temperature-controlled by a fluid, said functional modules (1) each having at least one line port (2) for directing the fluid at least one of in or out, the connection device (3a) comprising: a carrier module (6) for mounting at least one fluid line (4, 5) for at least one of feeding or discharging the fluid; at least two fluidic connector pieces (7) which by way of the carrier module (6) are fluidically connectable to the fluid line (4, 5) or to in each case one of the fluid lines (4, 5); and a kinematic installation which is disposed on the carrier module (6) and configured to modify at least one of a spacing between the connector pieces (7) or a length of the connector pieces (7) upon activation of said kinematic installation, so as to fluidically connect the connector pieces (7) to respective ones of the line ports (2).

9. The connection device (3a) as claimed in claim 8, wherein the connector pieces (7) are aligned along a first axis (Y) and the kinematic installation is configured to modify the at least one of the spacing between the connector pieces (7) or the length of the connector pieces (7) along the first axis (Y).

10. The connection device (3a) as claimed in claim 9, wherein the first axis (Y) is oriented substantially transverse to a direction of extent of the one fluid line (4, 5).

11. The connection device (3a) as claimed in claim 8, wherein the connector pieces (7) are configured as flexible metal bellows having a corrugated portion or comprise such metal bellows, with said metal bellows being mechanically pretensioned.

12. The connection device (3a) as claimed in claim 8, wherein the connector pieces (7) comprise a sleeve element (25) which is configured and provided for a fluidic connection to a line port (2) and including an introduction ramp or an introduction radius (25b).

13. The connection device (3a) as claimed in claim 8, wherein the carrier module (6) has two basic parts (6.1, 6.2) which are movably connected to each other and respectively hold or receive one of the connector pieces (7), and a) the kinematic installation comprises a cam-shaped element (9) which is disposed between at least one of the connector pieces (7) or the basic parts (6.1, 6.2), said cam-shaped element (9) being mounted on the carrier module (6) for rotation about a second axis (Z) such that the modification of the spacing between the connector pieces (7) is able to be effected by way of a rotation of the cam-shaped element (9); or b) the kinematic installation comprises a wedge-shaped element (23) which is disposed between at least one of the connector pieces (7) or the basic parts (6.1, 6.2), said wedge-shaped element (23) being mounted on the carrier module (6) for movement along a second axis (Z) such that the modification of the spacing between the connector pieces (7) is able to be effected by way of a movement of the wedge-shaped element (23).

14. The connection device (3a) as claimed in claim 13, wherein the basic parts (6.1, 6.2) each have at least one connector for the at least one fluid line (4, 5), said connector being fluidically connected to the respective connector piece (7).

15. The connection device (3a) as claimed in claim 8, wherein the carrier module (6) has at least two basic parts (6.1, 6.2) which are movably connected to each other and respectively hold or receive one of the connector pieces (7), as well as a branching element (12) which is disposed between at least one of the connector pieces (7) or the basic parts (6.1, 6.2), said branching element (12) fluidically connecting the connector pieces (7) to each other, and the kinematic installation comprises a gear assembly, and the modification of the length of the connector pieces (7) is adapted to be effected by activating said gear assembly such that the basic parts (6.1, 6.2) are diverged.

16. The connection device (3a) as claimed in claim 15, wherein the gear assembly has at least one first gear wheel (13) and at least one rack (14) which engages with the first gear wheel (13), said first gear wheel (13) being rotatable about a second axis (Z) while the rack (14) is oriented so as to be parallel to the connector pieces (7).

17. The connection device (3a) as claimed in claim 16, wherein the gear assembly is activatable while penetrating the branching element (12).

18. The connection device (3a) as claimed in claim 16, wherein the gear assembly additionally has at least one second gear wheel (13′), said second gear wheel (13′) engaging with the first gear wheel (13).

19. The connection device (3a) as claimed in claim 13, wherein the basic parts (6.1, 6.2) are equipped with functional faces for form-fitting reception of further lines or pipes (20), said functional faces being divided into sub-faces on the respective basic parts (6.1, 6.2) to permit the further lines or pipes (20) to be received only by said basic parts (6.1, 6.2) when joined and correctly assembled.

20. The connection device (3a) as claimed in claim 13, wherein the basic parts (6.1, 6.2) include, on external sides thereof that face away from each other, support structures with end-proximal functional faces for at least one of mounting or positioning on the functional modules (1) in a region of the line ports (2).

21. The connection device (3a) as claimed in claim 13, wherein the connector pieces (7) on one ends thereof are connected in a force-fitting or form-fitting manner to the basic parts (6.1, 6.2), and the basic parts (6.1, 6.2) have an assembly of snap-fit hooks (6b) which interact with a form-fit with an end-proximal rim (7a) of one said connector piece (7); or the basic parts (6.1, 6.2) have an introduction structure (6a) into which an end-proximal rim (7a) of one said connector piece (7) is introduced or introducible, said introduction structure (6a) interacting with a form-fit with the end-proximal rim (7a) of said connector piece (7); or the connector pieces (7) each have an end-proximal rim (7a), said rim (7a) being joined in a mating contour (6.1e, 6.2e) on a respective basic part (6.1, 6.2) by an interference fit and tilted in a direction of the joint.

22. The connection device (3a) as claimed in claim 21, wherein the connector pieces (7) on an other end thereof are connected to the branching element (12).

23. A connection assembly (3) comprising at least one connection device (3a) as claimed in claim 8, and at least one said fluid line (4, 5) for at least one of feeding or discharging the fluid, said fluid line (4, 5) being fluidically connected to the connector pieces (7) by way of the carrier module (6).

24. An arrangement of functional modules (1) that are temperature-controlled by a fluid, the arrangement comprising: said functional modules (1) each including at least one line port (2) for directing the fluid at least one of in or out; the connection assembly (3) as claimed in claim 23; at least two of the functional modules (1) being disposed at a mutual spacing such that the respective line ports (2) are disposed so as to be substantially opposite each other and aligned along a first axis (Y) and open into a region (11) between the functional modules (1); and the line ports (2) being fluidically connected to the fluid line (4, 5) by the connection device (3a).

25. The arrangement of functional modules (1) that are temperature-controlled by a fluid as claimed in claim 24, wherein the connection assembly (3) comprises at least two of the fluid lines (4, 5), one for feeding the fluid and one for discharging the fluid, and the functional modules (1) have in each case at least two of said line ports (2) of which one said line port is connected to the fluid line (4) for feeding the fluid, and one said line port is connected to the fluid line (5) for discharging the fluid.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Further properties and advantages of the invention are derived from the description hereunder of exemplary embodiments by means of the drawing in which:

[0076] FIG. 1 shows a first design embodiment of the connection assembly according to the invention, having a connection device according to the invention;

[0077] FIG. 2 shows a second design embodiment of the connection assembly according to the invention, having a connection device according to the invention;

[0078] FIG. 3 shows a connection device according to FIG. 2 in detail;

[0079] FIG. 4 shows a third design embodiment of the connection assembly according to the invention, having a connection device according to the invention;

[0080] FIG. 5 shows a connection device according to FIG. 4 in detail;

[0081] FIG. 6 shows a variant of the connection device according to FIG. 4 and FIG. 5;

[0082] FIG. 7 shows a fourth design embodiment of the connection assembly according to the invention, having a connection device according to the invention;

[0083] FIG. 8 shows a fifth design embodiment of the connection assembly according to the invention, having a connection device according to the invention;

[0084] FIG. 9 shows a sixth design embodiment of the connection assembly according to the invention;

[0085] FIG. 10 shows the connection assembly from FIG. 9 including an associated (assembly) tool;

[0086] FIG. 11 shows a detail of a further design embodiment of the connection assembly according to the invention;

[0087] FIG. 12 shows a detail of another design embodiment of the connection assembly according to the invention;

[0088] FIG. 13 shows a detail of yet another design embodiment of the connection assembly according to the invention; and

[0089] FIG. 14 shows a detail of yet another design embodiment of the connection assembly according to the invention.

DETAILED DESCRIPTION

[0090] In all the figures, the same reference signs identify identical or at least functionally equivalent elements.

[0091] Schematically illustrated at the reference sign 1 in FIG. 1 is a so-called functional module, said functional module potentially being in particular a battery cell, in particular for the electric drive of a motor vehicle. The functional module, or the battery cell 1, respectively, by way of example has two connector ports or line ports 2, respectively, which presently can serve for example for directing in a temperature-control fluid. The functional module 1 can have further line ports, in particular for directing the temperature-control fluid out. This is not illustrated for reasons of clarity in FIG. 1. Moreover, further (identical) functional modules 1 may be present.

[0092] Furthermore illustrated in FIG. 1 is a line assembly 3 which is composed of a plurality of individual component parts: in principle, there is firstly a first fluid line for feeding the temperature-control fluid, said first fluid line being provided with the reference sign 4. Furthermore, there is a second fluid line 5 for discharging the temperature-control fluid. The first fluid line 4 and the second fluid line 5 in a central region of the line assembly 3 have in each case two parallel-running strands 4.1, 4.2; 5.1, 5.2, said fluid lines 4, 5 in this region moreover having in each case a number of flexibly configured, corrugated line portions of which, for reasons of clarity, only a few are explicitly identified by the reference sign 4.1a, 4.2a; 5.1a, 5.2a in FIG. 1. The fluid lines 4, 5 are preferably embodied in a metallic material, preferably stainless steel.

[0093] Functional modules 1 are preferably disposed on both sides of the line assembly 3, this not being illustrated for reasons of clarity in FIG. 1.

[0094] The line assembly 3 moreover has two connection devices 3a having in each case one carrier module 6, reference in terms of the description of the latter being made to the detailed enlargement of one of the connection devices 3a contained in FIG. 1. The carrier modules 6 are preferably embodied in a plastics material. Each carrier module 6 comprises two basic parts 6.1, 6.2 which in the direction of the axis Y are movably connected to each other, in particular plugged into each other. Each of the basic parts 6.1, 6.2 here comprises two T-shaped connection pieces 6.1a, 6.1b; 6.2a, 6.2b, by way of which portions of the fluid lines 4, 5 are in each case fluidically connected to a connector piece 7 that extends in particular in the Y-direction, said connector pieces 7 preferably being configured as T-shaped castings including an internal seal (not shown) and each being welded or brazed/soldered to the first fluid line 4 or the second fluid line 5, or the parallel-running strands 4.1, 4.2; 5.1, 5.2 of said fluid lines 4, 5. For reasons of clarity, only one of the connector pieces 7 is explicitly identified in FIG. 1.

[0095] The connector pieces 7 are in each case disposed in particular in a leg 8 of the T-shaped connection pieces 6.1a, 6.1b; 6.2a, 6.2b, said leg 8 being configured in a (slotted) manner such that said leg 8 can be pushed onto one of the line ports 2. For this purpose, the connection devices 3a have in each case a cam-shaped element 9 with the aid of which the two basic parts 6.1, 6.2 can be diverged in the direction of the Y-axis, or counter to the latter, respectively, when an (automatic) operator activates a drive 10, in particular in the form of a hexagonal screwhead, present on the cam-shaped element 9 by way of a suitable tool. The connector pieces 7 then connect in a fluid-tight manner to the line ports 2, this to be discussed in more detail below. The flexible line portions 4.1a, 4.2a; 5.1a, 5.2a of the fluid lines 4, 5 ensure the required mobility in the Y-direction.

[0096] For assembling, the line assembly 3, preferably in the direction of the negative Z-axis, is incorporated in a region 11 between a plurality of functional modules 1 such that the legs 8, or the connector pieces 7, respectively, are aligned with the line ports 2 in the direction of the Y-axis. The drive 10, or the cam-shaped element 9, respectively, is then activated so as to connect the connector pieces 7 to the line ports 2. A spacing (in the Y-direction) between the connector pieces 7 is in particular modified in the process.

[0097] This results in a method for fluidically connecting functional modules 1 that are temperature-controlled by means of a fluid, in particular battery modules, in which method at least two functional modules 1 (of which only one is shown in FIG. 1) are disposed at a mutual spacing in such a manner that the respective line ports 2 are disposed so as to be substantially exactly opposite each other and aligned along a first axis, the latter being the Y-axis, and open into a region 11 between the functional modules 1. Thereafter, an at least partially flexible, preassembled connection assembly 3 is incorporated in the region 11 between the functional modules 1, said connection assembly 3 having at least one fluid line 4, 5 for feeding and/or discharging the fluid, and at least two fluidic connector pieces 7 which branch off from the fluid line, or each branch off from one of the fluid lines, in such a manner that the connector pieces 7 are in each case aligned with one of the line ports 2 along the first axis (Y), as is shown in FIG. 1 for the two line ports 2 illustrated. Subsequently, a spacing between the connector pieces 7 along the first axis (Y) is modified such that the connector pieces 7 each fluidically contact one of the line ports 2.

[0098] Shown in FIG. 2 is an alternative design embodiment of the connection assembly 3; for reasons of clarity, an illustration of the functional modules 1 has been dispensed with. Only the substantial points of differentiation between the connection assembly 3 and the connection assembly from FIG. 1 will be discussed in more detail hereunder.

[0099] The fluid lines 4, 5 initially are not branched but at reference sign 12 have so-called branching elements of which two connector pieces 7 branch off in each case in the direction of the Y-axis. The connector pieces 7 here are preferably configured as metal bellows. As is derived in particular from the detailed illustration of one of the connection devices 3a in FIG. 3, a kinematic installation having a gear wheel 13 is disposed in the Z-direction between two branching elements 12, said gear wheel 13 engaging with two racks 14 which are oriented in the Y-direction and are in each case configured on one of the basic parts 6.1, 6.2, the latter being in a mirror-inverted configuration.

[0100] The racks 14 are configured so as to be hollow, in the form of sleeves, and in each of the basic parts 6.1, 6.2 in this way implement a guiding function for in each case one guide bar 14′ which is disposed on the respective other basic part 6.1, 6.2 and is plugged into the rack 14. On the one hand, the basic parts 6.1 and 6.2 are mutually aligned and guided by means of these guide bars 14′. On the other hand, snap-fit connections or the like (not visible in the figure) that are preferably attached to the ends of the guide bars 14′ ensure locking of the connection device 3a in a preassembled shipping state (having a compressed metal bellows or connector piece 7, respectively).

[0101] The branching elements 12 are preferably configured in a metallic casting material and (at least the upper branching element in the Z-direction) have a penetration 12a through which the gear wheel 13 can be activated by way of a suitable tool, here a hexagonal socket wrench 15, so as to diverge the basic parts 6.1, 6.2 in the Y-direction, as a result of which the connector pieces 7 can be elongated and brought to connect to the line ports (cf. FIG. 1). The connector pieces 7 are preferably connected in a materially integral manner to the branching elements 12. The branching elements 12 have connector ports 12b for the fluid lines 4, 5.

[0102] The basic parts 6.1, 6.2 on the external sides thereof have functional faces which configure an introduction ramp 16 and a guide 17 for pushing onto the line ports (cf. FIG. 1). The basic parts 6.1, 6.2 opposite the introduction ramp 16 have an outwardly directed angular offset 18 having a penetration 18a, the latter potentially serving for fixing to the functional modules, for example by means of a screw 19, cf. FIG. 2.

[0103] The gear wheel 13 in the design embodiment shown (cf. also FIG. 5 below), besides the driving function thereof, also assumes further functions: The entire connection device 3a, by a snap-fit hook connection or the like to the branching elements 12 disposed thereabove and therebelow, and by a support on the racks 14 by means of in each case one molded collar face 13a on the top and the bottom, is stabilized and conjointly with the angular offsets 18 forms a supporting function for the fluid lines 4, 5.

[0104] The connector pieces 7 have an end-proximal rim 7a by way of which the former are held in a form-fitting manner in a respective associated insert 6a, the latter being configured on the basic parts 6.1, 6.2.

[0105] The basic parts 6.1, 6.2 at the reference sign 8′ have slotted protrusions, the function of the latter corresponding to that of the legs 8 described above. The protrusions 8′ open in the direction of the guides 17 such that the line ports (cf. FIG. 1) can be introduced into the protrusions 8′ and received within the protrusions 8′ (cf. also FIG. 8).

[0106] FIGS. 2 and 3 thus illustrate a method for fluidically connecting functional modules that are temperature-controlled by means of a fluid, in particular battery modules, in which method it is achieved that the connector pieces 7 by modifying a length of the connector pieces 7 along the first axis (Y) fluidically contact in each case one of the line ports 2 (cf. FIG. 1).

[0107] A design embodiment which has a slight variance in comparison to that of FIGS. 2 and 3 is shown in FIGS. 4 and 5. Only the substantial points of differentiation will be discussed in more detail.

[0108] A further fluid line 20 which is mounted by holding arms 21 is illustrated in FIG. 4, said holding arms 21 having bearing shells 22 for the further fluid line 20, said bearing shells 22 being in alignment when the basic parts 6.1, 6.2 are situated in the assembled state in which said basic parts 6.1, 6.2 are remote from each other. The further fluid line 20 can function as a safeguarding installation in the Z-direction.

[0109] A further point of differentiation between FIGS. 4 and 5 in comparison to FIGS. 2 and 3 lies in the fixing of the connector pieces 7 to the basic parts 6.1, 6.2. For this purpose, the basic parts 6.1, 6.2 have a number of snap-fit hooks 6b, the latter yet to be discussed in more detail below by means of FIGS. 13 and 14.

[0110] In order for the connector pieces 7 to be connected to the line ports (cf. FIG. 1), one proceeds in a manner analogous to that of FIGS. 2 and 3. Subsequently, the further fluid line 20 is inserted or clipped into the bearing shells 22. Said further fluid line can serve as an assembly safeguard.

[0111] A refinement of the design embodiment according to FIGS. 2 to 5 is illustrated in FIG. 6. The kinematic installation here comprises a further gear wheel 13′ which is disposed on a layshaft 13″ such that the tool 15 no longer has to be introduced while penetrating the branching element 12. Moreover, a desired positive (or negative) gearing ratio can be implemented in this way when the gear wheels 13, 13′ are suitably adapted to each other. The layshaft 13″ is preferably mounted on the connector ports 12b in the manner shown.

[0112] The fixing of the connector pieces 7 to the basic parts 6.1, 6.2 in the design embodiment according to FIG. 6, in a manner analogous to that of the design embodiment according to FIGS. 4 and 5, is performed by way of snap-fit hooks 6b.

[0113] A fundamentally different design embodiment of the connection devices 3a is shown in FIG. 7. While the design embodiment and the disposal of the fluid lines 4, 5 fundamentally correspond to that of FIG. 2, the action on the connector pieces (not visible in

[0114] FIG. 7) is not performed by means of a gear wheel and a rack, as in the design embodiments according to FIGS. 2 to 5, but by way of a (double) wedge-shaped element 23 which is inserted between the (invisible) connector pieces, or between the basic parts 6.1, 6.2, respectively, along the second axis (Z-direction), so as to in this way diverge the basic parts 6.1, 6.2 in the direction of the Y axis and to ensure an elongation of the connector pieces, said connector pieces potentially being fixed to/in the basic parts 6.1, 6.2 fundamentally according to the design embodiment in FIG. 3 or the design embodiment in FIG. 5.

[0115] Specifically, the wedge-shaped element 23 has two ramps 23a and 23b which in each case interact with complementary ramps 6.1c/d, 6.2c/d on the basic parts 6.1, 6.2. The wedge-shaped element 23 moreover has two clearances 23c, 23d which enable the fluid lines 4, 5 to pass through. One of the clearances 23c is configured as an elongate bore, so as to enable a movement of the wedge-shaped element 23 in the Z-direction. As is illustrated, the fluid lines 4, 5 in this region can be configured so as to be flattened and so as to correspond to a shape of the clearances 23c, 23d.

[0116] The lowered position of the wedge-shaped elements 23 is shown in FIG. 7, in which lowered position the connector pieces for contacting the line ports are deformed (elongated) in the +/−Y-direction (cf. FIG. 1).

[0117] The basic parts 6.1, 6.2 on the external sides thereof are preferably designed (introduction ramp 16, guide 17, . . . ) as has been described in detail above by means of FIG. 3, reference being made thereto.

[0118] A partial cross section through a further design embodiment in which the bellows-type connector pieces 7 radially on the inside are in each case provided with one spring element 24 and one sleeve element 25 is shown in FIG. 8. The spring element 24 is preferably a coil spring. The sleeve element 25 has an end-proximal rim or flange 25a. The connector pieces 7 on the inside are connected to the branching element 12 and on the outside are connected (in a materially integral manner) to the rim 25a.

[0119] Shown in FIG. 8 is a compressed state of the connector pieces 7, said compressed state being maintained by means of a suitable holding tool 26, said tool engaging on suitable protrusions of the basic parts 6.1, 6.2. The spring elements 24 are supported on the branching element 12, on the one hand, and on the rim 25a, on the other hand. If the tool 26 is removed, the spring elements 24 press the sleeve elements 25 toward the outside and in this way elongate the connector pieces 7 until a (fluid-tight) connection to the line port 2 of the functional modules is established (said line port 2 being only schematically illustrated (by dashed lines)). The fluid-tight connection here is not performed directly by the connector pieces 7 per se but in the region of the sleeve elements 25 which in the region of the angular offset of the rim configure a suitable introduction ramp (introduction radius) 25b.

[0120] As is also the case in the other design embodiments of the present invention, a plastic deformation (elongation) of the connector pieces 7 advantageously arises in the process. To this end, said connector pieces 7 can have a correspondingly suitable corrugation (deformation corrugation).

[0121] However, the invention is not limited in this context; this applies in particular also in terms of the specific design embodiment of the spring element 24.

[0122] A variant of the design embodiment according to FIG. 8 which entirely dispenses with carrier modules/basic parts is shown in FIGS. 9 and 10. The connection assembly 3 shown in FIG. 9 has the fluid lines 4, 5, which have already been mentioned multiple times, having branching elements 12 and connector pieces 7 branching off from the latter. Now shown in FIG. 10 is moreover a suitable (gripping) tool 27 which grips the connector pieces 7 such that the latter in the region of the end-proximal rims 7a are held in a form-fitting manner and are able to be compressed by moving tool halves 27a, 27b inward along the Y-axis. The tool halves 27a, 27b mentioned in turn are divisible in the direction of the X-axis so as to release the connector pieces 7 again such that the latter are relaxed and able to be connected to the line ports 2 in a manner analogous to that of the design embodiment in FIG. 8 (cf. FIG. 8).

[0123] Implemented in this way can be a method in which, for compressing the connector pieces 7 and for incorporating the connection assembly 3, is provided a tool 27 which [0124] preferably first grips the connection assembly 3; [0125] compresses the connector pieces 7; [0126] positions the connection assembly 3, preferably including a compensation of tolerances by way of flexible line elements in the connection assembly 3; [0127] relaxes the connector pieces 7 and preferably additionally plastically forms the latter when contacting the line ports 2 (by traveling outward in the direction of the Y-axis); [0128] permits the connector pieces 7 to rebound to a state which, except for inherent stresses and the stresses remaining as a result of potential friction of sealing elements, is non-stressed; and [0129] subsequently releases the connection assembly 3.

[0130] Provided for this purpose also in the design embodiment according to FIGS. 9 and 10 is in each case a sleeve element 25, as has been described in detail above by means of FIG. 8. The end-proximal rims 25a of the sleeve elements 25 extend so as to be parallel to the mentioned rims 7a of the connector pieces 7.

[0131] Finally, different possibilities of fixing the connector pieces 7 to the basic parts 6.1, 6.2 are again illustrated in FIGS. 11 to 14, some of these possibilities having already been mentioned above.

[0132] FIG. 11 shows a design embodiment analogous to that of FIG. 3, in which the connector pieces 7 by way of the end-proximal rim 7a thereof are inserted into a corresponding receptacle (insert) 6a on the basic parts 6.1, 6.2 and held in a form-fitting manner therein.

[0133] A design embodiment having a so-called “claw” is illustrated in FIG. 12: The connector pieces 7 (again) have an end-proximal rim 7a, said rim 7a by way of an interference fit being joined in a mating contour 6.1e, 6.2e of the basic part 6.1, 6.2 and being tilted in the direction of the joint. In the case of a load reversal, the optionally slotted rim 7a is erected and interlocks in a form-fitting and friction-fitting (force-fitting) manner in the mating contour 6.1e, 6.2e, as is shown. The mating contour 6.1e, 6.2e is preferably embodied in a plastics material and the rim 7a is preferably embodied so as to be metallic. If the rim 7a is geometrically produced by a cutting process such as a stamping process, it is advantageous for the cutting burr to be oriented such that interlocking is supported and a particularly advantageous design embodiment thus results.

[0134] As is also derived from FIG. 12, a sealing element (annular seal, O-ring) 28 can be present in the region of the sleeve element 25 so as to improve the fluid-tight connection to the line ports (not shown here).

[0135] According to FIG. 13, the connection of connector pieces 7 (and sleeve elements 15) is performed by way of snap-fit hooks 6b, as has already been described above.

[0136] A variant of embodiment (likewise having snap-fit hooks 6b), in which the sealing element 28 is not disposed in the region of the sleeve element 25 but in the region of the element at the reference sign 8′, is shown in FIG. 14.

[0137] A comparison between FIG. 13 and FIG. 14 clearly shows the difference between the elongated state of the connector pieces 7 (FIG. 13) and the initial state (FIG. 14) before the connector pieces 7 are elongated in the direction of the Y-axis.

[0138] As the person skilled in the art will easily recognize, the fixing possibilities for the connector pieces 7 according to FIGS. 11 to 14 can fundamentally be used in all design embodiments of the invention, either in an arbitrary manner or depending on the requirements, with the exception of only the design embodiment according to FIGS. 9 and 10, in which no basic parts are used so that corresponding fixing of the connector pieces 7 is not required.