DE102018124364A1 - Contacting and wiring of battery modules - Google Patents

Abstract

Module carrier unit (2) for contacting a battery module (18), comprising an electrically conductive carrier plate (4) for receiving the battery module (18), a plurality of connections (6) for contacting the poles (12, 14) of a battery module (18), The connections (6) are arranged on the carrier plate (4) in such a way that the length of the connecting paths for the electrical connection of the poles (12, 14) of the battery module (18) to the poles (12, 14) of a further battery module (18) regardless of the arrangement of the poles (12, 14) of the battery modules (18) to be connected can be minimized.

Description

The present invention relates to a module carrier unit, a system and a method for contacting and connecting battery modules.

The publication DE 10 2014 204 245 A1 relates to a battery module with a plurality of galvanic cells, in particular battery cells, each having a first outer side, comprising a first electrode and a second outer side, comprising a second electrode, the cells being electrically connected to one another with the outer sides via the electrodes are.

The publication DE 10 2014 217 119A1 relates to a cell carrier for receiving a plurality of battery cells, which has a plurality of recesses which are formed spaced apart from one another in a flat body and are each formed for receiving a battery cell. The battery cells which can be accommodated within the cell carrier and are insulated from one another can also be connected to one another by means of a connecting element comprising a first and a second contact element.

A disadvantage of the prior art mentioned is the high outlay on contacting and wiring of battery modules, each with differently positioned battery poles. Different positions of the poles occur especially when using battery modules from different manufacturers or different cell types. The high outlay for contacting and wiring results in particular from the fact that long connecting elements have to be used for the desired connection of the poles. The use of such connecting elements is disadvantageous for several reasons. On the one hand, the interconnection or contacting process is much more complex when using long connecting elements and requires more connecting material, so that there are not only disadvantages with regard to material and manufacturing costs, but also with regard to the weight of the battery modules. Furthermore, long connecting elements in particular are often the most critical point with regard to line breaks and line resistances, which counteracts efficient and long-lasting contacting and interconnection.

It is therefore the object of the present invention to at least partially remedy the disadvantages described above, in particular it is the object of the present invention to provide a device, a system and a method for contacting and connecting battery modules which are as simple as possible and enables a long-lasting and energy-efficient electrical connection of the poles of different battery modules in a cost-effective manner.

The above object is achieved by a device with the features of claim 1, a system according to claim 6 and a method according to claim 10. Further features and details emerge from the subclaims, the description and the drawings. Technical features that are disclosed for the device according to the invention also apply in connection with the system according to the invention and the method according to the invention and vice versa, so that with regard to the disclosure of the individual aspects of the invention, reference can always be made to one another. Advantageous embodiments of the invention are set out in the dependent claims.

The module carrier unit according to the invention for contacting a battery module comprises an electrically conductive carrier plate for receiving the battery module and a plurality of connections for contacting the poles of a battery module. According to the invention, the connections are arranged on the carrier plate in such a way that the length of the connection paths for the electrical connection of the poles of the battery module to the poles of a further battery module can be minimized independently of the arrangement of the poles of the battery modules to be connected.

In the context of the invention, contacting is understood to mean the production of an electrical contact.

In the context of the invention, electrical conductivity is understood to mean a conductivity under standard conditions of at least greater than 5 · 10 ^-6 S / cm, in particular of at least greater than 10 ⁴ S / cm.

It also goes without saying that the module carrier unit according to the invention for contacting a battery module is also suitable for contacting capacitors or fuel cells or the like.

The module carrier unit according to the invention for contacting a battery module can preferably be used in a motor vehicle, in particular in an electric vehicle or a hybrid vehicle, and can preferably be arranged there within the drive, in particular in the region of the battery. Furthermore, the module carrier unit according to the invention can be used in all modular energy stores (stationary battery stores for solar systems, battery systems in ships, aircraft, construction machines, etc.).

The inventive minimization of the length of the connection paths for the electrical connection of the poles of a first battery module to the poles of a second battery module can be achieved in particular by establishing an indirect electrical connection between a first pole of a first battery module and a pole of a second battery module via a carrier plate. This is then achieved, for example, in that the carrier plate is in electrical connection with a pole of a first battery module and a pole of a second battery module and the carrier plate and the respective poles thus have the same electrical potential.

In fact, it has been recognized that the connection of the poles of two battery modules via a carrier plate provides significantly greater flexibility with regard to the use of battery modules from different manufacturers and cell types, since by means of an interconnection via a carrier plate, regardless of the arrangement of the poles of the battery modules to be connected, always short connection paths and thus a long-lasting, energy-efficient and inexpensive connection of battery modules is provided.

In order to ensure a particularly flexible arrangement and contacting or connection of battery modules, it can be provided according to the invention that the carrier plate has an electrically conductive core and an insulation layer arranged around the core. The electrically conductive core is advantageously at least partially formed from an aluminum material, in particular at least partially from a copper material. A corresponding configuration not only promises good electrical conductivity, but also good thermal conductivity, which is particularly advantageous in terms of efficient heat dissipation. The insulation layer arranged around the electrically conductive core is formed in the form of an electrically non-conductive connection, preferably in the form of a plastic, a ceramic or the like. The insulation layer can also be applied, for example, in the form of a lacquer, a film or a paint to the electrically conductive core of the carrier plate according to the invention.

In order to ensure the shortest possible interconnection paths for interconnecting individual modules of battery cells and, at the same time, to provide the greatest possible flexibility for the arrangement of the battery modules, it can also be provided that the connections according to the invention are arranged within an edge region of the carrier plate. This edge region is preferably arranged in the outer region of the carrier plate and in particular is formed in the form of an outer frame or the like. The size of the edge area can advantageously be determined and / or varied with regard to the size of a battery module that can be arranged on the carrier plate. Alternatively or cumulatively to an arrangement of the connections in the edge regions of the carrier plate, an integration of the connections outside the edge regions and / or inside and / or below the carrier plate in question is also conceivable.

With regard to the most flexible arrangement of the poles of battery modules or the most flexible use of battery modules from different manufacturers and module types, the invention can in particular provide that the connections are at least partially arranged on opposite sides of the carrier plate. In the case of a rectangular shape of the carrier plate in question, it can be particularly advantageous with regard to a connection that is as flexible as possible if the carrier plate has at least four connections arranged at least partially on opposite sides of the carrier plate. In this case, a connection is made to the connections arranged on the carrier plate, in particular in such a way that two mutually opposite connections are electrically connected to the same pole of a battery module. It is also conceivable that connections for the electrical connection can also be arranged below the carrier plate, so that, for example, electrical connections coming from a carrier plate for connecting adjacent carrier plates can also be routed over the underside of the plate.

With regard to simple installation and removal or replacement of battery modules, the connections can advantageously be designed such that a releasable electrical connection can be established between the battery poles and the connections. The objective connections arranged on the carrier plate are likewise at least partially formed from a copper, at least partially from an aluminum or at least partially from an iron material and are preferably connected to the carrier plate in a positive, non-positive or material manner. In the case of an embodiment of a carrier plate surrounded by an insulation layer, the connections are in electrical connection with the electrically conductive core and are preferably connected to the latter in a form-fitting, force-fitting or material-locking manner. In this way, a positive, non-positive or integral electrical connection between the carrier plate and the poles of battery modules can also be established via the connections. Here, the electrical connections can also be made in a detachable form, for example in the form of plug connections or screw connections be formed in permanent form, for example in the form of soldered connections, welded connections or crimped connections. In the context of flexible contacting, different types of contacting can also advantageously be present side by side.

The invention also relates to a system for interconnecting battery modules. The system in question comprises a base unit for receiving module carrier units described above, a plurality of module carrier units described above, and a plurality of battery modules arranged on the module carrier units. The system according to the invention thus brings with it the same advantages as have already been described in detail with reference to the module carrier unit according to the invention.

The base unit in question for accommodating module carrier units can preferably be in the form of a battery base or the like and can be both electrically conductive and also electrically non-conductive or insulating. With regard to the structure of the system in question, the object carrier plates are preferably arranged in a sandwich-like manner between the base unit and the battery modules, the carrier plates and the base unit and / or the battery modules preferably being arranged at least essentially parallel to one another at least along one surface, in particular the flat sides the carrier plates and the base unit and / or the battery module are arranged essentially parallel to one another. As an alternative or cumulatively to battery modules arranged within the system in question, capacitors or fuel cells or solar cells or the like can also be arranged on the module carrier units according to the invention and connected to one another and / or to battery modules.

With regard to a simple and flexible connection of individual battery modules, it can be provided in accordance with the invention in the context of an electrically conductive base unit that the base unit has electrically insulated cutouts for receiving the module carrier units. Such an embodiment allows, in particular, an electrically conductive and non-insulated design of the base unit in question, which enables improved heat dissipation.

With regard to the most compact possible arrangement of the system in question, the cutouts can preferably be formed in the form of recesses for the flush mounting of the module carrier units. Such a compact arrangement is particularly advantageous with regard to a space-saving design of the system according to the invention. In this case, the cutouts can preferably also be recessed deeper and ensure flush mounting of battery modules arranged on the module carrier units. Alternatively or cumulatively, it can be provided according to the invention that the system in question is encapsulated in a housing or integrated in a housing.

In order to ensure efficient and effective dissipation of the heat loss generated within the battery modules, the base unit in question can also advantageously have a coolant channel for cooling the module carrier plates. The coolant channel is preferably arranged directly adjacent to the module carrier plates. In the context of an arrangement directly adjacent to the module carrier plates, the coolant channel is then either electrically insulated from the module carrier unit or is operated by means of an electrically non-conductive but thermally highly conductive coolant, such as a thermally conductive oil or the like. With a view to efficient cooling, the coolant channel can furthermore preferably have flow guiding devices for flow guidance in order to dissipate the heat generated during power transmission as evenly as possible from the battery modules or the system in question.

The invention also relates to a battery comprising a module carrier unit described above, in particular comprising a system described above.

The invention also relates to a method for contacting battery modules. The method for contacting battery modules comprises the step of establishing a first electrical connection between a first pool of a first battery module and a module carrier unit, and the step of establishing a second electrical connection between a second pole of the first battery module and a first pool of a second battery module . Furthermore, the method according to the invention comprises the step of establishing a third electrical connection between the first pool of the first battery module and a second pole of the second battery module via at least one module carrier unit, by the length of a connection path of the electrical connection between the first pole of the first battery module and one to minimize the second pole of the second battery module regardless of the arrangement of the poles of the battery modules to be connected. The method according to the invention thus brings with it the same advantages as already detailed in relation to the method according to the invention Module carrier unit and the system according to the invention have been described.

The second step of the method according to the invention - the production of the second electrical connection - can also be produced here via a carrier plate arranged below the second battery module. When the battery modules are contacted or connected, they can be connected both in series and in parallel, so that the first pole of the battery modules can represent both the negative and the positive pole of the battery modules. By establishing the first and the third electrical connection according to the invention, the carrier plate has in particular the electrical potential of one of the poles of the first battery module. As an alternative or cumulatively to a contact or to an electrical connection of battery modules, according to the method according to the invention, it is also possible to produce a pure or conceivable non-mixed combination of contacts or electrical connections between battery modules, capacitors, fuel cells, solar cells or the like.

Further advantages, features and details of the invention emerge from the following description, in which exemplary embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and in the description can each be essential to the invention individually or in any combination.

• 1a eine schematische Darstellung einer erfindungsgemäßen Modulträgereinheit zur Kontaktierung eines Batteriemoduls gemäß einem ersten Ausführungsbeispiel in einer Draufsicht,
• 1b eine schematische Darstellung der erfindungsgemäßen Modulträgereinheit gemäß 1a in einer Schnittansicht entlang der Schnittlinie I-I,
• 2a eine schematische Darstellung der erfindungsgemäßen Modulträgereinheit zur Kontaktierung eines Batteriemoduls gemäß einem zweiten Ausführungsbeispiel in einer Draufsicht,
• 2b eine schematische Darstellung einer erfindungsgemäßen Modulträgereinheit zur Kontaktierung eines Batteriemoduls gemäß einem dritten Ausführungsbeispiel in einer Draufsicht,
• 3a eine schematische Darstellung der Anordnung eines Batteriemoduls gemäß einer ersten Ausführung auf einer erfindungsgemäßen Modulträgereinheit zur Kontaktierung eines Batteriemoduls,
• 3b eine schematische Darstellung einer Anordnung eines Batteriemoduls gemäß einer zweiten Ausführung auf einer erfindungsgemäßen Modulträgereinheit zur Kontaktierung eines Batteriemoduls,
• 4a eine schematische Darstellung einer Anordnung eines Batteriemoduls gemäß einer dritten Ausführung auf einer erfindungsgemäßen Modulträgereinheit zur Kontaktierung eines Batteriemoduls,
• 4b das Batteriemodul gemäß 4a in einer um 180° entlang der Längsachse des Batteriemoduls gedrehten Ansicht,
• 5 eine schematische Darstellung eines erfindungsgemäßen Systems zur Verschaltung von Batteriemodulen in einer Draufsicht,
• 6 eine schematische Darstellung eines Teilausschnitts des erfindungsgemäßen Systems gemäß 5 gemäß einem zweiten Ausführungsbeispiel, umfassend einen Kühlkanal 24 zur effektiven Wärmeabführung.

Show it:

• 1a 1 shows a schematic representation of a module carrier unit according to the invention for contacting a battery module according to a first exemplary embodiment in a plan view,
• 1b a schematic representation of the module carrier unit according to the invention 1a in a sectional view along the section line II,
• 2a 1 shows a schematic illustration of the module carrier unit according to the invention for contacting a battery module according to a second exemplary embodiment in a plan view,
• 2 B 1 shows a schematic representation of a module carrier unit according to the invention for contacting a battery module according to a third exemplary embodiment in a plan view,
• 3a 1 shows a schematic representation of the arrangement of a battery module according to a first embodiment on a module carrier unit according to the invention for contacting a battery module,
• 3b 1 shows a schematic representation of an arrangement of a battery module according to a second embodiment on a module carrier unit according to the invention for contacting a battery module,
• 4a 1 shows a schematic representation of an arrangement of a battery module according to a third embodiment on a module carrier unit according to the invention for contacting a battery module,
• 4b the battery module according to 4a in a view rotated by 180 ° along the longitudinal axis of the battery module,
• 5 1 shows a schematic representation of a system according to the invention for interconnecting battery modules in a top view,
• 6 is a schematic representation of a partial section of the system according to the invention 5 according to a second embodiment, comprising a cooling channel 24th for effective heat dissipation.

Identical reference symbols are used in the figures for the same technical features.

1a shows a schematic representation of a module carrier unit according to the invention 2nd for contacting a battery module 18th according to a first embodiment in a plan view. The module carrier unit 2nd includes an electrically conductive carrier plate 4th that have an inner area 4b and an edge area 4a having. In the edge area 4a , which here is frame-like around the inner area 4b extends, in the present case two connections are located opposite each other 6 for contacting the poles 12, 14 of a battery module 18th arranged. The connections 6 can be formed in the form of plug connections, screw connections, crimp connections, welded connections, soldered connections or the like and a positive, non-positive or material connection of the carrier plate 4th or the module carrier unit 2nd to the poles 12th , 14 a battery module 18th enable. Alternatively or cumulatively to an arrangement of the connections 6 in the marginal areas 4a the carrier plate 4th is also an integration of the connections 6 outside the edge areas 4a and / or within the subject carrier plate 4th conceivable.

1 b shows a schematic representation of the module carrier unit according to the invention 2nd according to 1a in a sectional view along the cutting line II . The electrically conductive core arranged in the present case 10th can in particular at least partially from a copper, at least partially from an aluminum or at least partially be made of an iron material and is directly connected to the connections 6 electrically connected. The one around the electrically conductive core 10th Insulation arranged around may preferably be in the form of a plastic, a ceramic or the like and for example as an insulation layer 8th , as an insulating varnish, as an insulating film, as an insulating paint or the like.

2a shows a schematic representation of the module carrier unit according to the invention 2nd for contacting a battery module 18th according to a second embodiment in a plan view. According to this second exemplary embodiment of the module carrier unit according to the invention 2nd In the present case, it has three in the edge areas 4a the carrier plate 4th arranged connections 6 on, two of which are arranged on opposite sides.

2 B shows a schematic representation of a module carrier unit according to the invention 2nd for contacting a battery module 18th according to a third embodiment in a plan view. According to the third exemplary embodiment, the module carrier unit according to the invention comprises 2nd four in the marginal areas 4a the carrier plate 4th arranged connections 6 for contacting the poles 12th , 14 a battery module 18th , in the present case two each on opposite sides of the carrier plate 4th are arranged. The more connections 6 for contacting the poles 12th , 14 a battery module 18th on the carrier plate in question 4th are arranged and the more uniform these on the edge areas 4a distributed, the more flexible the respective connection options with one of the battery poles 12th , 14 the battery modules concerned 18th .

3a shows a schematic representation of the arrangement of a battery module 18th according to a first embodiment on a module carrier unit according to the invention 2nd for contacting a battery module 18th . The battery module 18th is according to 3a in the inner area 4b the carrier plate 4th arranged and has two, in the present case on the same side of the battery module 18th arranged fasteners 16 to connect the poles 12th , 14 of the battery module 18th with the poles 12th , 14 one or more battery modules 18th on. The lanyard 16 can preferably be formed as a cell connector or the like and advantageously be at least partially flexible. With the objective arrangement of the poles 12th , 14 of the battery module 18th is an indirect connection according to the invention with the poles 12th , 14 another module 18th over the carrier plate 4th or the module carrier unit according to the invention 2nd not necessary since the poles 12th , 14 both on the same side of the module 18th are arranged and thus in a simple manner with another battery module that can be arranged next to it 18th can be connected.

3b shows a schematic representation of an arrangement of a battery module 18th according to a second embodiment on a module carrier unit according to the invention 2nd for contacting a battery module 18th . The battery module 18th the second embodiment also has two on the top of the battery module 18th led poles 12th , 14 on, however, on different sides of the battery module 18th are arranged. In such an embodiment, it makes sense, for example, the pole formed here as a negative pole 14 with a lanyard 16 via a connection 6 with the carrier plate 4th to connect so that the support plate 4th at the same potential as the negative pole 14 of the battery module 18th lies and an interconnection of the negative pole 14 of the battery module 18th with one pole 12th , 14 of another battery module 18th in a simple way via the carrier plate 4th can be done. Such an electrical connection can then be present via a further one next to the positive pole 12th arranged connecting means 16 respectively. The plus pole 12th is already on the right side, so a connection via a lanyard 16 can be arranged directly on this.

In this way it is possible to use long lanyards 16 for the electrical connection of the poles 12th , 14 of battery modules 18th to avoid and interconnection only via short and compact on the carrier plate 4th arranged connecting means 16 perform. This not only makes unnecessary weight for long lanyards 16 saved, but also a simpler, more durable and more efficient way of electrical connection of different battery modules 18th created.

4a shows a schematic representation of an arrangement of a battery module 18th according to a third embodiment on a module carrier unit according to the invention 2nd for contacting a battery module 18th . According to the present embodiment, the battery module comprises 18th Bolts 20th and sleeves 20 ' into which the bolts are inserted, through which the battery module 18th is screwed in the present case to the carrier or base plate and via which contact can also be made here. Here is one of the bolts 20th over the sleeve 20 ' and the inside of the battery module 18th arranged last of the battery cells 28 about the connection 21 with the negative pole 14 of the battery module 18th connected, so that according to this embodiment, an interconnection or contacting of the battery module 18th with the carrier plate 4th via an electrical connection of the carrier plate 4th with the relevant bolt 20th can be done. Such an electrical connection requires one Bolts with an enlarged contact area on the module base. This contact surface is screwed against the carrier plate, which must not be insulated in this receiving area. The screw connection provides the necessary force for safe electrical contacting

4b shows the battery module 18th according to 4a in a view rotated by 180 ° around the long side, in which the bottom of the battery module 18th is shown in a partial top view. Recessed in the floor you can see the openings or threads of the bolts 20th , which preferably for contacting the carrier plate 4th can serve by electrically conductive fasteners, such as rivets, screws or bolts through the carrier plate (not shown here) 4th into the openings or threads of the bolts 20th screwed or otherwise inserted and fastened. A connection is then made in the present case via the opening or the thread of the marked screw bolt, which is located inside the battery module 18th via a screw sleeve with the negative pole 14 of the battery module 18th connected is.

5 shows a schematic representation of a system according to the invention 1 for connecting battery modules 18th in a top view. The system 1 has a floor unit 22 on that to accommodate module carrier units 2nd is formed and is preferably formed in the form of a battery base or the like. The ground unit 22 can be both electrically conductive and electrically non-conductive or insulating. On the floor unit 22 there are a total of ten recesses arranged side by side 26 to accommodate module carrier units 2nd arranged. The recesses 26 are in this case electrically non-conductive and insulate the floor unit 22 electrically from the module carrier units 2nd . In the or on the recesses 26 are the carrier plates 4th here sandwiched between the floor unit 22 or the recesses 26 and the battery modules 18th arranged. In a compact arrangement, the recesses 26 also formed in this way and to the carrier plates 4th be adapted to the carrier plates 4th flush in the recesses 26 can be used.

The system according to the invention enables flexible interconnection of battery modules 18th with short connection paths regardless of the arrangement of the poles 12th , 14 of the respective battery modules 18th ensures what in particular a flexible selection of battery modules 18th while maintaining a robust, cost-effective and energy-efficient design.

In addition to contacting and interconnecting battery modules 18th can by means of the present system 1 in addition, other energy stores, such as capacitors, fuel cells, solar cells or the like on the module carrier units 2nd be arranged and with each other and / or with battery modules 18th can be connected.

6 shows a schematic representation of a partial section of the system according to the invention 1 according to a second embodiment, comprising a coolant channel 24th for effective heat dissipation. The inside of the floor unit 22 arranged coolant channel 24th is in the present case immediately below the module carrier plate 4th arranged to ensure the most efficient cooling or dissipation of heat generated during power transmission. For electrical insulation between the carrier plate 4th and the coolant channel 24th , the coolant channel 24th either by means of an insulation layer 8th from the carrier plate 4th be isolated or operated by means of a thermally conductive but electrically non-conductive coolant, such as a thermally conductive oil or the like. With regard to efficient cooling, the coolant channel can 24th further preferably have flow guiding devices for flow guidance in order to distribute the heat generated during the power transmission as evenly as possible from the battery modules 18 or the system in question 1 to be able to dissipate.

Reference list

1

System for the interconnection of battery modules

2nd

Module carrier unit

4th

Carrier plate

4a

Edge area

4b

Inner area

6

connections

8th

Insulation layer

10th

core

12th

Positive pole

14

Negative pole

16

Lanyard

18th

Battery module

20th

Bolts

20 '

Sleeve

21

connection

22

Ground unit

24th

Coolant channel

26

Recesses

28

Battery cells

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included 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.

Patent literature cited

• DE 102014204245 A1 [0002]
• DE 102014217119 A1 [0003]

Claims (10)

Module carrier unit (2) for contacting a battery module (18), comprising - an electrically conductive carrier plate (4) for receiving the battery module (18), - a plurality of connections (6) for contacting the poles (12, 14) of a battery module (18), - The connections (6) are arranged on the carrier plate (4) such that the length of the connecting paths for the electrical connection of the poles (12, 14) of the battery module (18) to the poles (12, 14) of a further battery module (18 ) can be minimized regardless of the arrangement of the poles (12, 14) of the battery modules (18) to be connected. Module carrier unit (2) after Claim 1 characterized in that the carrier plate (4) has an electrically conductive core (10) and an insulation layer (8) arranged around the core (10). Module carrier unit (2) after Claim 1 or 2nd , characterized in that the connections (6) are arranged within an edge region (4a) of the carrier plate (4). Module carrier unit (2) according to one of the preceding claims, characterized in that the connections (6) are at least partially arranged on opposite sides of the carrier plate (4). Module carrier unit (2) according to one of the preceding claims, characterized in that the connections (6) are designed such that a releasable electrical connection between the battery poles (12, 14) and the connections (6) can be established. System (1) for connecting battery modules (18), comprising - a base unit (22) for receiving module carrier units (2) according to one of the Claims 1 to 5 , - A plurality of module support units (2) according to one of the Claims 1 to 5 , - A plurality of battery modules (18) arranged on the module carrier units (2). System (1) according to Claim 6 , characterized in that the base unit (22) has electrically insulated cutouts (26) for receiving the module carrier units (2). System (1) according to Claim 7 , characterized in that the recesses (26) are formed in the form of recesses for the flush mounting of the module carrier units (2). System (1) according to one of the Claims 6 to 8th , characterized in that the base unit (22) has a coolant channel (24) for cooling the module carrier plates (4). Method for contacting battery modules (18), comprising the steps: - Establishing a first electrical connection between a first pole (12, 14) of a first battery module (18) and a module carrier unit (2), - Establishing a second electrical connection between a second pole (12, 14) of the first battery module (18) and a first pole (12, 14) of a second battery module (18), - Establishing a third electrical connection between the first pole of the first battery module (18) and a second pole (12, 14) of the second battery module (18) via at least one module carrier unit (2) by the length of a connection path of the electrical connection between the first Minimize the pole (12, 14) of the first battery module (18) and the second pole (12, 14) of the second battery module (18) regardless of the arrangement of the poles of the battery modules (18) to be connected.

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