Cooling module for batteries of an electric or hybrid vehicle

Abstract

Cooling module for batteries of an electric or hybrid vehicle with a coolant supply line (1), a coolant discharge line (2), a plurality of flat tubes (3) arranged side by side, between which there is space for batteries to be cooled, each of the flat tubes (3) being connected to the coolant supply line (1) and the coolant discharge line (2), the flat tubes (3) each carrying connecting pieces (6), the coolant supply line (1) and the coolant discharge line (2) are each composed of several line segments which are connected by a connecting piece (6) of one of the flat tubes (3) to one of the connecting pieces (6) of an adjacent flat tube (3), and a spacer strip (8) is arranged between adjacent flat tubes (3), which defines spaces between itself and each of the two adjacent flat tubes (3) for batteries which are to be cooled only on one side, namely the side which, in use, rests against one of the flat tubes (3), while the opposite side resting against the spacer strip (8) is not to be cooled, wherein the cooling module comprises a plurality of spacer strips (8) characterized in that the spacer strips (8) have an extension (11) which contacts the coolant supply line (1) and / or the coolant discharge line (2).

Description

[0001] The invention relates to a cooling module for batteries of an electric or hybrid vehicle. A cooling module according to the preamble of claim 1 is disclosed in US 2017 / 162922 A1. Similar cooling modules without spacer strips are disclosed in US 2007 / 039717 A1, US 2009 / 301700 A1, WO 2021 / 123550 A1, EP 2 962 355 A2, WO 2021 / 185992 A1, EP 4 138 176 A1, WO 2023 / 046530 A1, and CZ 2 019 697 A1.

[0002] Batteries in electric or hybrid vehicles must be cooled during operation with a coolant, usually an aqueous liquid. At low temperatures, the coolant can also be heated and thus used to warm the batteries.

[0003] The object of the present invention is to provide a cooling module for batteries of electric or hybrid vehicles which can be manufactured cost-effectively and adapted to the number of batteries or battery cells of an electric or hybrid vehicle with little effort.

[0004] This object is achieved by a cooling module having the features specified in claim 1. Advantageous developments of the invention are the subject of subclaims.

[0005] A cooling module according to the invention has a coolant supply line, a coolant discharge line, and several flat tubes arranged side by side, between which there is space for batteries to be cooled and which are each connected to the coolant supply line and the coolant discharge line. The individual flat tubes can thus be connected in parallel to one another with the coolant supply line and the coolant discharge line and run transversely to the coolant supply line and the coolant discharge line. According to the invention, the flat tubes each carry connecting pieces, and the coolant supply line and the coolant discharge line are each assembled from several line segments, each of which connects a connecting piece of one of the flat tubes to a connecting piece of an adjacent flat tube. The line segments can be formed by the connecting pieces or can be designed as separate parts in addition to the line segments.

[0006] In the cooling module according to the invention, some or all of the batteries or battery cells rest on one side only against one of the flat tubes and on the opposite side against a spacer strip that runs between two adjacent flat tubes. To save costs, the spacer strip can be made of plastic or metal. For many applications, it is not necessary for the batteries or battery cells to rest on opposite sides against one of the flat tubes. If lower cooling capacities are sufficient, costs can be saved if the batteries or battery cells rest on a flat tube with only one side and on a spacer strip that is arranged between two adjacent flat tubes.

[0007] In an advantageous development of the invention, the spacer strip has an extension with which it is attached to the coolant supply line and / or the coolant discharge line. For example, the extension can protrude between the coolant supply line and the coolant discharge line. Batteries or battery cells can be glued to such a spacer strip. The batteries can thus advantageously be mechanically fixed by the spacer strip without impairing the thermal coupling to the flat tube opposite the spacer strip. However, it is also possible for such a spacer strip to be clamped between batteries or battery cells. Spacer strips can also be used in particular at the beginning and end of a cooling module, so that all flat tubes rest against batteries on both sides.

[0008] A further advantageous development of the invention provides that the spacer strips have the same thickness as the flat tubes. The thickness of a flat tube and a spacer strip is measured between a side facing the batteries or battery cells and an opposite side, ignoring local recesses or depressions on both sides. The term "same thickness" means that the thickness of the flat tubes and the spacer strips match within manufacturing tolerances. For applications where reduced cooling capacity is sufficient and batteries therefore only rest against a flat tube on one side, some flat tubes are replaced by spacers.

[0009] In this way, the number of flat tubes of a cooling module according to the invention and thus the number of places for batteries to be cooled can be adapted to the requirements of vehicle manufacturers with little effort.

[0010] Depending on the shape of the batteries or battery cells, the flat tubes can be corrugated or flat. Corrugated flat tubes are particularly suitable for cylindrical batteries, while flat flat tubes are particularly suitable for cuboid-shaped batteries or battery cells. The batteries can, for example, be glued to the flat tubes or attached to them in some other way. For cuboid-shaped batteries, flat tubes can also be used that not only rest against the front or back of the batteries, but also against part of the narrow sides of the batteries, for example, by bending the flat tubes in a stepped manner.

[0011] An advantageous development of the invention provides that the spacer strips have a groove formed as an interrupted groove that runs alternately on opposite sides of the spacer strip. When batteries or battery cells are attached to the spacer strip by means of adhesive, the groove can become filled with adhesive, in particular with an excessive amount of adhesive originally applied to adhesive surfaces adjacent to the groove.

[0012] When corrugated flat tubes and spacer strips are used, for example for cylindrical batteries or battery cells, opposite surfaces of the spacer strips can have areas that rest against batteries or battery cells and are attached to them with adhesive. Areas of the surface that have a groove for adhesive alternate longitudinally with areas that are not involved in attaching the spacer strip to the battery or battery cells and therefore do not require a groove. The groove is therefore an interrupted groove, i.e. arranged alternately on opposite surfaces of each spacer strip. A spacer strip with an interrupted groove also has greater mechanical stability than a spacer strip with a continuous groove on both sides. In addition, an interrupted groove makes it possible to maintain a homogeneous material thickness in areas surrounding the groove.

[0013] An advantageous development of the invention provides that the groove is arranged between adhesive surfaces for attaching the spacer strip to a battery or battery cell by means of an adhesive, wherein the adhesive surfaces alternate with recessed surfaces in the longitudinal direction of the spacer strip. The recessed surfaces are not involved in attaching the spacer strip to a battery or battery cell and can be used to reduce the weight of the spacer strip and save costs. The recessed surfaces can be delimited by webs in order to maintain the mechanical stability of the spacer strip despite the reduced thickness of the spacer strip in the region of the recesses. The webs can, for example, intersect to form an X.

[0014] A further advantageous development of the invention provides that the extension of the spacer strip has an opening through which the coolant supply line or the coolant discharge line runs. This simplifies the assembly of the cooling module. For example, the spacer strip can be clipped or latched onto the coolant supply line or the coolant discharge line. For such a connection, the coolant supply line and the coolant discharge line can be provided with a stop ring that rests against the extension of the spacer strip around the opening. Latching hooks can extend from the stop ring and create a clipped or latched connection with the extension. The opening can have recesses for these hooks on its circumference.

[0015] The flat tubes can be made of plastic at low cost. Another option is to make the flat tubes of metal, such as an aluminum alloy, which can advantageously achieve better thermal coupling of the coolant to the batteries or battery cells.

[0016] Flat metal tubes can, for example, be manufactured as extruded profiles, which may be deformed after extrusion, for example by being corrugated.

[0017] An advantageous development of the invention provides that the connecting pieces are attached to end pieces that are secured to the ends of the flat tubes. Such end pieces can be attached to the flat tubes, for example, by a plug-in connection. Alternatively or additionally, a fluid connection can be used, for example, by gluing, soldering, or welding. Connecting pieces can be formed integrally with the end pieces or attached to the end pieces as separate components, for example, by means of a plug-in connection. Alternatively or additionally, the connectors can also be firmly attached to the corresponding end piece, for example, by means of adhesive, soldering, or welding.

[0018] In the cooling module according to the invention, the flat tubes can run between the coolant supply line and the coolant discharge line. In this case, the flat tubes each have an end piece at their two ends, with which they are connected to the coolant supply line or the coolant discharge line via connecting pieces. Alternatively, it is also possible for the flat tubes to each have an end piece with multiple connecting pieces at only one end, and for the coolant supply line and the coolant discharge line to run on the same side, transversely to the flat tubes. In this case, each flat tube forms at least two channels running alongside one another, namely a forward channel and a return channel. Such a flat tube can be manufactured as an extruded profile from the outset with a central web that separates the two channels or several forward and several return channels from each other.Alternatively, a flat tube can be pressed longitudinally in a central section, and its top and bottom welded together in this central section. The end of the flat tube not used for connection to the coolant supply line and the coolant discharge line is then closed with a deflector that connects the two channels of the flat tube. Such a deflector can be made of metal or plastic and connected to the flat tubes, for example, by a plug-in connection. Alternatively or additionally, the end piece can also be firmly bonded to the flat tube in question, for example by gluing, soldering, or welding.

[0019] An advantageous development of the invention provides that an end piece of a flat tube forms both connecting pieces for the coolant supply line and connecting pieces for the coolant discharge line. This reduces the number of parts and thus achieves cost-effective production. However, it is also possible to use a separate end piece for each of the channels of the flat tube, each of which is connected via connecting pieces only to the coolant supply line or only to the coolant discharge line.

[0020] An advantageous development of the invention provides that the line segments of the coolant supply line and the coolant discharge line are connected to the connecting pieces by a plug-in connection. The connecting pieces can be plugged into the line segments, or the line segments can be plugged into the connecting pieces. The end pieces can also carry a connecting piece into which one of the line segments is plugged, and an inner part that projects into the respective line segment. The inner part can carry an annular seal, for example, in an annular groove. In this way, not only can leakage be reliably prevented, but manufacturing tolerances regarding the alignment of the components involved in the plug-in connection can also be compensated. Furthermore, the seal between the line segment and the inner part can be protected by the connecting piece.

[0021] Flat tubes that sit between adjacent flat tubes can be designed with end pieces that each have connecting pieces for the coolant supply line or the coolant discharge line on opposite sides. It is possible for the connecting pieces to be designed identically on both sides, for example, as a male part of a plug-in connection on both sides or as a female part of a plug-in connection on both sides. In one embodiment of the invention, however, it is also possible for the connecting pieces to be designed as a male part of a plug-in connection on one side of the end piece and as a female part of a plug-in connection on an opposite side of the end piece.If an end piece carries connection nozzles for both the coolant supply line segments and the coolant discharge line segments, it is also possible to have both a connection nozzle for a male plug connection and a connection nozzle for a female plug connection on each side of the end piece. In this case, it is particularly advantageous if an end piece that carries connection nozzles for both the coolant supply line and the coolant discharge line carries both a male and a female part for a plug connection on each side. An assembly with a flat tube that has end pieces and connection nozzles can then be used in two different orientations for the cooling module, which differ by 180°.

[0022] As described above, the present invention relates to a cooling module for batteries of an electric or hybrid vehicle, i.e., a cooling module that has not yet been equipped with corresponding batteries. However, the invention also relates to such a cooling module with batteries, i.e., in particular, a cooling module with a coolant supply line, a coolant discharge line, and a plurality of adjacent flat tubes, between which batteries to be cooled are arranged and which are each connected to the coolant supply line and the coolant discharge line. The flat tubes each carry connecting pieces, and the coolant supply line and the coolant discharge line are each assembled from a plurality of line segments, each of which connects a connecting piece of one of the flat tubes to a connecting piece of an adjacent flat tube.The line segments can be formed by the connecting pieces or can be additional parts that are different from the connecting pieces.

[0023] Further details and advantages of the invention are explained using exemplary embodiments with reference to the accompanying drawings. Identical and corresponding components are provided with identical reference numerals in the various drawings. They show: Fig. 1 a schematic representation of an embodiment of a cooling module according to the invention; Fig. 2 a side view of the Fig. 1 shown cooling module; Fig. 3 a sectional view of Fig. 1; Fig. 4 a view of detail A of Fig. 3; Fig. 5 a view of detail B of Fig. 3; Fig. 6 a schematic representation of a further embodiment of a cooling module according to the invention; Fig. 7 a schematic detailed view of another embodiment of a cooling module; Fig. 8 is a schematic sectional view of a detail of the embodiment of Fig. 7; Fig. 9 is a schematic cross-sectional view of a detail of another embodiment; Fig. 10 an end section of a spacer strip with line segments; Fig. 11 a cross-sectional view of a detail of Fig. 10; Fig. 12another view of the line segment from Fig. 10; and Fig. 13 another view of the line segment of Fig. 10.

[0024] The Fig. 1 to 5 schematically show a cooling module for batteries of an electric or hybrid vehicle. The cooling module has a coolant supply line 1 and a coolant discharge line 2, as well as several flat tubes 3. The flat tubes 3 are connected in parallel to the coolant supply line 1 and the coolant discharge line 2. The flat tubes 3 run parallel to each other and perpendicular to the coolant supply line 1 and the coolant discharge line 2. Between adjacent flat tubes 3, there is space for batteries 7 to be cooled. The batteries 7 can, for example, be glued to the sides of the flat tubes 3.

[0025] In the illustrated embodiment, the flat tubes 3 are flat and thus adapted to batteries 7 with a flat outer surface, for example, cuboid-shaped batteries. However, the flat tubes can also be corrugated to be adapted to batteries with a correspondingly curved outer surface, for example, circular-cylindrical batteries. The flat tubes 3 can be made of metal, such as an aluminum alloy, or plastic, for example.

[0026] In the embodiment shown, the coolant supply line 1 and the coolant discharge line 2 are arranged at opposite ends of the flat tubes 3. The flat tubes 3 contain one or more parallel flow channels that run from one end of the flat tube 3 to its opposite end. However, it is also possible for the coolant supply line 1 and the coolant discharge line 2 to be arranged at the same end of the flat tubes 3. In this case, the flat tubes 3 contain two or more channels, namely a forward channel and a return channel. Each flat tube 3 can be provided with several parallel forward channels and several return channels to increase mechanical stability. Channels can be separated from one another in the flat tube 3 by an inner wall or a weld seam that connects the front and back of a flat tube 3.If the coolant supply line 1 and the coolant discharge line 2 are arranged at the same end of the flat tubes 3, the flat tubes 3 carry a deflection piece (not shown in the figures) at their end facing away from the coolant supply line 1 and the coolant discharge line 2, which connects the forward channel to the return channel. The deflection piece can be connected to the flat tubes 3, for example, by a plug-in connection and / or a material connection, e.g., welding or gluing.

[0027] The coolant supply line 1 and the coolant discharge line 2 are each assembled from several line segments and connected to the flat tubes 3 via connecting pieces 6. The connecting pieces can form the line segments or connect line segments formed as separate parts. At their end, with which the flat tubes 3 are connected to the coolant supply line 1 or the coolant return line 2, the flat tubes 3 carry an end piece 5, which is connected to the flat tubes 3 by a plug connection and / or a material connection, e.g., welding or gluing.

[0028] The connecting pieces 6 are attached to these end pieces 5, for example by a material connection and / or a plug connection.

[0029] In the embodiment of the Fig. 1 to 5, the line segments of the coolant supply line 1 and the coolant discharge line 2 are inserted into the connecting pieces 6. The line segments can be surrounded by sealing rings 12 in the connecting pieces 6 in order to compensate for tolerances in the alignment of the connecting pieces and to prevent leaks.

[0030] In the Fig. In the embodiment shown in Figures 1 to 5, a spacer strip 8 is arranged between adjacent flat tubes 3. Batteries 7 are then held in the schematically illustrated cooling module between one of the flat tubes 3 and one of the spacer strips 8. The batteries 7 are then cooled only on one side, namely the side adjacent to the respective flat tube 3, while the opposite side is not cooled. This is sufficient in many cases.

[0031] The spacer strips 8 can be manufactured inexpensively from plastic and are provided with an extension 11 that abuts the coolant supply line 1 and / or the coolant discharge line 2, for example a U-shaped or C-shaped extension. If the coolant supply line 1 and the coolant discharge line 2 are arranged at the same end of the flat tubes 3, the extension 11 can protrude between the coolant supply line 1 and the coolant discharge line 2, thus facilitating positioning during assembly. An extension 11 of the spacer strips 8 that abuts the coolant supply line 1 and the coolant discharge line 2 facilitates assembly, particularly if the extension has an opening for the coolant supply line 1 and / or the coolant discharge line 2.An opening, for example a U- or C-shaped opening or a through hole, facilitates the correct positioning of the coolant supply line 1 or the coolant discharge line 2 relative to the spacer strips 8.

[0032] The cooling module can also be used to heat the batteries by passing heated coolant through the cooling module. In frosty conditions, batteries at the edge of the cooling module often require increased heating, so it may be advantageous to omit spacer strips 8 only in one end section of the cooling module and to arrange the flat tubes 3 at correspondingly smaller distances from each other, so that the batteries rest against the flat tubes on both sides.

[0033] Fig. 4 shows detail A of Fig. 3 and Fig. 5 the details B of Fig. 3. The Fig. 3 to 5 show in detailed views an end section of a flat tube 3 of the cooling module described above together with an end piece 5 attached to the flat tube 3, which carries a connecting piece 6 for connecting a line section of the coolant supply line 1 or the coolant discharge line 2.

[0034] The connecting piece 6 surrounds an end section of a line segment of the coolant supply line 1 or the coolant discharge line 2. The line segment carries an annular seal 12, for example an O-ring, in a groove.

[0035] It is also possible for the end piece 5 to have an inner part in addition to the connecting piece 6, and for the connecting piece 6 to surround this inner part, which can carry a ring seal 10, for example, an O-ring, in an annular groove. The line section of the coolant supply line 1 or the coolant discharge line 2 then surrounds this inner part and protrudes into the connecting piece 6, thus being located between the connecting piece 6 and the inner part 9.

[0036] Fig. 6 schematically shows a further cooling module for batteries of an electric or hybrid vehicle, which differs from the embodiment described above in that corrugated flat tubes 3 and spacer strips 8 are used with cylindrical batteries 7 and the coolant supply line 1 and the coolant discharge line 2 are located on the same side of the flat tubes 3.

[0037] Fig. Fig. 7 schematically shows a detail of a further embodiment of a cooling module, which has a coolant supply line 1, a coolant discharge line 2, several flat tubes 3 and spacer strips 8. In the embodiment of Fig. 6 and Fig. 7, the extensions 11 of the spacer strips 8 have openings in the form of through holes through which the coolant supply line 1 and the coolant discharge line 2 pass. In this context, it is noted that the connecting pieces 6 can also form the coolant supply line 1 and the coolant discharge line 2 without additional line segments.

[0038] In the embodiment of Fig. 7, connecting pieces 6 arranged at one end of the flat tubes 3 are inserted into the line segments of the coolant supply line 1 and the coolant discharge line 2, respectively. The line segments of the coolant supply line 1 and the coolant discharge line 2 are thus female parts of a plug-in connection, while the connecting pieces 6 are male parts of the plug-in connection.

[0039] Fig. Figure 8 shows a schematic sectional view of the connection between two segments of the coolant supply line 1 or the coolant discharge line 2. As can be seen, connecting pieces 6 in adjacent flat tubes are inserted into a segment of the coolant supply line 1 (or the coolant discharge line 2, which can be designed in the same way). This section surrounds the connecting pieces 6 and carries an annular seal 10 on an inner side. The annular seal 10 surrounds one of the connecting pieces 6 and is pressed against it.

[0040] In the Fig. In the embodiment shown in Figure 8, a separate ring seal 10 is arranged for each connecting piece 6 in the line segments. Alternatively, the ring seal 10 can also be formed as a single piece that rests against both connecting pieces 6.

[0041] Fig. Figure 9 shows a detail of another embodiment of a cooling module for batteries of an electric or hybrid vehicle. This embodiment differs from the embodiment of Fig. 1 to 5 in that the supply line and the discharge line are formed exclusively from connecting pieces of adjacent flat tubes. The connecting pieces alone therefore form the segments of the supply line and the discharge line and, as in Fig. 4, no separate line segments are attached to the individual connection pieces.

[0042] As in Fig. As shown in Figure 9, line segments of the supply line and the discharge line are formed from two connecting pieces 6a, 6b, one of these connecting pieces 6a being a male connecting piece and the other connecting piece 6b being a female connecting piece. The male connecting piece 6a penetrates the female connecting piece 6b. An annular seal 10, for example an O-ring, can be arranged between the male connecting piece 6a and the female connecting piece 6b, for example in a groove of the male connecting piece 6a.

[0043] Fig. 10 shows an embodiment of a spacer strip 8 for the Fig. 7 and Fig. 8 can be used. The spacer strip 8 has a groove 13. The function of this groove 13 is to absorb any excess adhesive that is applied to the adhesive surfaces 14 on both long sides of the groove 16. As can be seen in Fig. 10, the groove 13 is only present in valleys of the corrugated spacer strip 8. In sections of the spacer strip 8 that form hills, the groove is interrupted because cylindrical batteries are arranged in the valleys and attached to the spacer strip 8 in these valleys by means of adhesive. Since batteries or battery cells are attached to both sides of the spacer strip, the interrupted groove 13 is provided on both sides of the spacer strip. When the groove 13 ends on one side of the spacer strip 8, it begins on the opposite side of the spacer strip, a hill on one side of the spacer strip 8 is a valley on the opposite side.

[0044] The adhesive surfaces 14, which are attached to batteries or battery cells by means of adhesive, alternate in the longitudinal direction of the spacer strip 8 with surfaces 17 that are not intended for contacting batteries. These surfaces 17 can be recessed surfaces (not shown). The adhesive surfaces 14 are located in the valleys, and the surfaces 17 not intended for contact with batteries are located in the hills of the corrugated spacer strips 8. Where the spacer strip 8 has a surface 17 on one side, an adhesive surface 14 of the spacer strip 8 is located on the opposite side, and vice versa.

[0045] Recessed surfaces alternate with adhesive surfaces 14 and can locally reduce the thickness of the spacer strip, thus saving weight. Recessed surfaces can be provided with webs to increase mechanical stability.

[0046] Fig. 11 shows in detail a sectional view of Fig. 10 and illustrates how the line sections 15 can be attached to the spacer strips 8. The line sections 15 are attached to the spacer strips 8 by a clip or snap connection. The line segments 15 have a stop ring 19 that rests against the spacer strip 8 when the line segment 15 is inserted into the opening 16 of the spacer strip 8. The line segments 15 also have snap-in hooks 20 that can extend from the stop ring 19. The openings of the spacer strips 8 have recesses around their periphery to accommodate the snap-in hooks 20. This facilitates simple assembly of the system. List of reference symbols 1 coolant supply line 2 coolant discharge line 3 flat tube 5 End piece 6 connecting pieces 6a male connection piece 6b female connection piece 7 batteries 8 spacer strips 10 ring seal 11 Extension 12 Seal 13 grooves 14 adhesive surfaces 15 line segments 16 grooves 17 recessed surface 19 Stop ring 20 locking hooks QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This 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

[0000] US 2017 / 162922 A1

[0001] US 2007 / 039717 A1

[0001] US 2009 / 301700 A1

[0001] WO 2021 / 123550 A1

[0001] EP 2 962 355 A2

[0001] WO 2021 / 185992 A1

[0001] EP 4 138 176 A1

[0001] WO 2023 / 046530 A1

[0001] CZ 2 019 697 A1

[0001]

Claims

[1] Cooling module for batteries of an electric or hybrid vehicle with a coolant supply line (1), a coolant discharge line (2), a plurality of flat tubes (3) arranged side by side, between which there is space for batteries to be cooled, each of the flat tubes (3) being connected to the coolant supply line (1) and the coolant discharge line (2), the flat tubes (3) each carrying connecting pieces (6), the coolant supply line (1) and the coolant discharge line (2) are each composed of several line segments which are connected by a connecting piece (6) of one of the flat tubes (3) to one of the connecting pieces (6) of an adjacent flat tube (3), and a spacer strip (8) is arranged between adjacent flat tubes (3), which defines spaces between itself and each of the two adjacent flat tubes (3) for batteries which are to be cooled only on one side, namely the side which, in use, rests against one of the flat tubes (3), while the opposite side resting against the spacer strip (8) is not to be cooled, wherein the cooling module comprises a plurality of spacer strips (8) characterized by that the spacer strips (8) have an extension (11) which contacts the coolant supply line (1) and / or the coolant discharge line (2). [2] Cooling module according to claim 1, characterized by that the flat tubes (3) are corrugated. [3] Cooling module according to one of the preceding claims, characterized by that the connecting pieces (6) are attached to end pieces (5) which are attached to the ends of the flat tubes (3). [4] Cooling module according to claim 3, characterized bythat the flat tubes (3) carry end pieces with connecting pieces (6) at opposite ends, and that the flat tubes (3) run between the coolant supply line (1) and the coolant discharge line (2). [5] Cooling module according to claim 3, characterized by that the flat tubes (3) carry end pieces (5) with connecting pieces (6) only at one end, and that the coolant supply line (1) and the coolant discharge line (2) run on the same side of the flat tubes (3), the flat tubes (3) each forming at least two channels running alongside one another. [6] Cooling module according to claim 3, characterized by that the end pieces (5) each carry connecting pieces (6) for the coolant supply line (1) and the coolant discharge line (2). [7] Cooling module according to one of the preceding claims, characterized by that the extension (11) has an opening (16) through which the coolant supply line (1) or the coolant discharge line (2) runs. [8] Cooling module according to claim 7, characterized by that the coolant supply line (1) and the coolant discharge line (2) are held in the openings by locking hooks (20). [9] Cooling module according to claim 8, characterized by that the opening (16) has recesses on the circumference which receive the locking hooks (20) of the coolant supply line (1) or the coolant discharge line (2). [10] Cooling module according to claim 9, characterized by that the locking hooks (20) extend from a stop ring (19) which rests on one edge of the opening. [11] Cooling module according to one of the preceding claims, characterized by that the spacer strips (8) have the same thickness as the flat tubes (3). [12] Cooling module according to one of the preceding claims, characterized bythat the spacer strips (8) have a groove (13), said groove (13) being an interrupted groove which runs alternately on opposite sides of the spacer strips (8). [13] Cooling module according to claim 12, characterized by that the groove (13) is arranged between adhesive surfaces (14) for bonding the spacer strips (8) to a battery or battery cell, wherein in the longitudinal direction of the spacer strips the adhesive surfaces (14) alternate with recessed surfaces (17). [14] Cooling module according to claim 13, characterized by that the recessed surfaces (17) are limited by webs (18).

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