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WO2020007994A1 - Battery cell arrangement and method for producing the battery cell arrangement - Google Patents

Battery cell arrangement and method for producing the battery cell arrangement Download PDF

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Publication number
WO2020007994A1
WO2020007994A1 PCT/EP2019/068022 EP2019068022W WO2020007994A1 WO 2020007994 A1 WO2020007994 A1 WO 2020007994A1 EP 2019068022 W EP2019068022 W EP 2019068022W WO 2020007994 A1 WO2020007994 A1 WO 2020007994A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery cells
flexible film
cell arrangement
battery cell
fluid channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2019/068022
Other languages
German (de)
French (fr)
Inventor
Matthias Ganz
Jessica KANSKY
André Loges
Heiko Neff
Dominique WEINMANN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of WO2020007994A1 publication Critical patent/WO2020007994A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H01M10/6555—Rods or plates arranged between the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/20—Pressure-sensitive devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to a battery cell arrangement with a plurality of battery cells, in particular with a plurality of pouch cells, according to the preamble of claim 1.
  • the invention also relates to a method for producing the battery cell arrangement.
  • No. 9,546,827 B2 discloses a cooling arrangement which has a hard shell through which fluid can flow and a flexible cover for closing the hard shell.
  • the cooling arrangement is arranged on a battery module comprising a plurality of battery cells in a heat-transferring manner and the battery cells are cooled if necessary.
  • US Pat. No. 9,666,912 B2 describes a cooling arrangement with a flexible bag which is applied to a battery module comprising a plurality of battery cells in a heat-transferring manner and is coupled to the battery cells in a heat-transferring manner.
  • US 2017/0194679 A1 describes a cooling arrangement which has a multi-layer cooling plate with paths integrated in the cooling plate for removing the waste heat from a battery module.
  • metal sheets for example, can be clamped between the battery cells in the battery module in order to also dissipate the waste heat from there.
  • Hybrid or electric vehicles often have large battery modules in order to meet the requirements for long range and high rapid charging capacity.
  • the current cooling or heating arrangements are preferably below the battery modules and require a lot of installation space.
  • the contact resistance between the cooling or heating arrangement and the individual battery cells in the battery module is too high. This is often reduced by thermal interface materials such as gap fillers. However, this leads to the lengthening of the heat conduction path and to the cost and weight increase of the battery modules.
  • the object of the invention is therefore to provide an improved or at least alternative embodiment for a battery cell arrangement of the generic type in which the disadvantages described are overcome. Furthermore, a method for producing the battery cell arrangement is to be specified.
  • a generic battery cell arrangement has several battery cells, in particular several pouch cells.
  • the multiple battery cells each have two opposing main surfaces and are stacked with the respective main surfaces facing one another in a stacking direction to form a stack.
  • Current arresters of electrical poles of the plurality of battery cells extend perpendicular to the stacking direction.
  • the battery cell arrangement also has a temperature control arrangement with at least one fluid channel through which a fluid can flow and which is arranged on the adjacent battery cells. According to the tempering arrangement is formed by a flexible film loop. At least one longitudinal section of the flexible film loop is arranged between two adjacent battery cells and lies on the main surfaces of the respective adjacent battery cells, each with a wall area.
  • the flexible film loop is pressed in the at least one longitudinal section in the stacking direction between the adjacent battery cells in such a way that at least one further wall area arranged between its wall areas lying against the flap areas forms a closed loop and the at least one fluid channel of the temperature control arrangement is thereby formed ,
  • the flexible film loop is to be understood as an endless film web that has been folded over in the longitudinal direction and is deformable and has no fixed cross-sectional profile.
  • the flexible film loop is therefore flexible in the longitudinal direction and its cross-sectional profile can be changed.
  • the at least one fluid channel is formed by the closed loop in the flexible film loop, as a result of which the at least one fluid channel has no connecting seams, such as, for example, welded or sealed seams. In particular, this can effectively prevent leakage in the at least one fluid channel.
  • the at least one fluid channel is formed by the closed loop and therefore exclusively by the wall area of the longitudinal section arranged between the wall areas adjacent to the main areas.
  • the fluid channel is closed and can only be flowed through within the closed loop and thus in the wall area arranged between its wall areas adjacent to the main surfaces. In other words, there is no flow of the fluid between the two wall areas lying on the main surfaces of the battery cells or between the main surfaces of the adjacent battery cells. Furthermore, due to the flexibility of the film loop, when flowing through a fluid, the at least one fluid channel contacts the battery cells to be temperature-controlled, so that the thermal contact resistance between the battery cells to be temperature-controlled and a fluid flowing in the at least one fluid channel is advantageously reduced becomes effective and the battery cells can be tempered. The installation space required for the temperature control arrangement and the weight of the battery cell arrangement can advantageously also be reduced.
  • the battery cell arrangement can have different types of battery cells, but in particular has pouch cells.
  • the at least one fluid channel can contact the surface surrounding the fluid channel between the sealed seams of the adjacent battery cells, so that the temperature of the pouch cells - and in particular the heat dissipation from the Pouch cells - is improved.
  • the sealed seams of the individual pouch cells can either be turned over or not turned over. In principle, the sealing seams do not have to be turned over, which enables the pouch cells to be tempered homogeneously.
  • the flexible film loop can form the closed loop on the adjacent battery cells only on one side.
  • the wall areas adjacent to the respective flap surfaces adjoin the wall area forming the at least one fluid channel in the transverse direction of the flexible film loop.
  • a further wall area of the flexible film loop arranged between the wall areas lying on the flap surfaces forms a closed loop, thereby forming a fluid channel of the temperature control arrangement on both sides of the adjacent battery cells.
  • the adjacent battery cells can be tempered on both sides by the fluid in the two fluid channels.
  • the wall areas of the flexible film loop resting on the respective main surfaces are fixed to one another in a fluid-tight manner in the at least one longitudinal section.
  • the at least one fluid channel lies on the outside against the adjacent battery cells and there is no flow of the fluid between the adjacent battery cells.
  • the size of the battery cell arrangement in the stacking direction can thereby be reduced. If the fluid channels are formed on both sides of the adjacent battery cells, they can be fluidly separated from one another as a result. In this embodiment of the battery cell arrangement, the two fluid channels can be separated from one another by pressing, regardless of the material of the flexible film loop.
  • the wall areas of the flexible film loop that are in contact with the respective main surfaces are firmly bonded to one another in the at least one longitudinal section in a connection area.
  • the two wall areas are preferably thermally welded to one another, for which purpose the material of the flexible film loop is expediently thermally connectable.
  • a geometric area of the connection area is smaller than a geometric area of the respective main areas of the adjacent battery cells. This allows any tolerances in dimensions and shapes of the neighboring battery cells - and in particular the neighboring pouch cells - to be compensated for.
  • the at least one fluid channel can thereby transfer heat to the adjacent battery cells and the temperature of the battery cells can be improved.
  • the flexible film loop is formed from a stretchable material.
  • the wall area of the flexible film loop forming the fluid channel can expand in the at least one longitudinal section when a fluid flows through it, and the fluid channel can contact the respective adjacent battery cells.
  • the heat conduction path in particular can be shortened and the heat transfer between the battery cells and the fluid can be intensified.
  • the extent of the wall area of the flexible film loop forming the fluid channel can also be limited in some areas, on the one hand to allow the at least one fluid channel to be applied to the adjacent battery cells and on the other hand to avoid excessive expansion of the wall area forming the fluid channel.
  • the flexible film loop is reinforced at least in some areas in a reinforcement zone of the wall region forming the fluid channel.
  • the wall area forming the fluid channel in the reinforcement zone can have a greater thickness or an integrated reinforcement element and can therefore be less elastic or flexible.
  • a border strip can be fixed to the at least one fluid channel between the adjacent battery cells, which is formed, for example, from a non-flexible material.
  • a border insert - for example a retaining clip - can be arranged in the at least one fluid channel, which is formed for example from a non-flexible material.
  • the reinforcement zone and / or the border strip and / or the border insert can limit an expansion of the wall area of the flexible film loop forming the fluid channel perpendicular to the stacking direction away from the adjacent battery cells and support it in the stacking direction towards the adjacent battery cells.
  • the at least one fluid channel contacts a larger surface to be tempered of the adjacent battery cells, which improves the temperature control of the battery cells.
  • the heat-conducting plate projects in some areas into the at least one fluid channel in order to conduct the heat between the main surfaces of the adjacent battery cells and the fluid in the fluid channel.
  • the battery cells can not only be tempered externally, but also the main surfaces of the battery cells can be cooled or heated.
  • the heat-conducting plate represents a so-called heat spreader and improves the heat transfer between the main surfaces of the respective neighboring battery cells and the fluid in the at least one fluid channel.
  • the heat conducting plate expediently consists of a heat conducting material and can for example be metallic.
  • the heat-conducting plate can have a structure - for example an embossing - for enlarging a surface of the heat-conducting plate.
  • the heat transfer coefficient can also be increased.
  • the heat-conducting plate can be at least partially surrounded by a compression mat made of an elastic material to compensate for tolerances between the neighboring battery cells - and in particular process-related tolerances between the pouch cells. In this way, for example, tolerances caused by thermal and state of charge expansion of the battery cells can be compensated for and local overloading of the battery cell prevented.
  • the flexible film loop is an endless film tube without joints. This in particular minimizes the risk of leakage and simplifies the production of the battery cell arrangement.
  • the flexible film loop can be made of, for example be formed of a composite film, which preferably has an outer layer, a diffusion barrier layer and an outer layer.
  • the outer layer and the inner layer can consist of different thermoplastics and the diffusion barrier layer of aluminum.
  • the thermoplastic of the inner layer can have a lower melting temperature than the thermoplastic of the outer layer in order to enable the diffusion barrier layer to be sealed.
  • the diffusion barrier layer ensures a low permeation or diffusion of molecules of the fluid from the at least one fluid channel to the outside.
  • the flexible film loop can alternatively be formed from an elastomer or from a plastic with a low permeation.
  • the flexible film loop can be formed from a plastic film with fire-retardant additives.
  • the fire retardant additives can be triphenyl phosphate (TPP) or brominated polystyrene (PS).
  • TPP triphenyl phosphate
  • PS brominated polystyrene
  • the flexible film loop can be formed from a non-burning or hardly burning plastic, preferably from polyvinyl chloride (PVC) or polytetrafluoroethylene (PTFE).
  • the fluid channel of the temperature control arrangement formed by the closed loop fluidly opens into a collector and / or into a distributor.
  • the temperature control arrangement and thereby the battery cell arrangement according to the invention can be produced inexpensively.
  • the at least one fluid channel is better connected to the battery cells to be cooled, as a result of which the temperature of the battery cells is improved.
  • the heat transfer between the battery cells and the fluid can be further improved by a heat conducting plate.
  • the temperature control arrangement in the battery cell arrangement according to the invention has a reduced space requirement and the weight of the battery cell arrangement is advantageously reduced.
  • the invention also relates to a method for producing the battery cell arrangement described above. First, the flexible film loop with the at least one longitudinal section is arranged between the adjacent battery cells and the respective wall areas of the flexible film loop are placed on the respective main surfaces of the respective adjacent battery cells.
  • the flexible film loop is then pressed in the at least one longitudinal section in the stacking direction between the adjacent battery cells, so that the at least one further wall area of the flexible film loop arranged between the wall areas adjacent to the main surfaces forms a loop and thereby the at least one Fluid channel of the tempering arrangement is formed.
  • the temperature control arrangement can consequently be fixed to the stack immediately when the battery cells are pressed in the stack direction, as a result of which an additional production step is omitted. Furthermore, the temperature control arrangement can be produced inexpensively, since semifinished products are formed when the battery cell arrangement is manufactured.
  • the battery cell arrangement 2 according to the invention has a plurality of battery cells 3 with two main surfaces 5a and 5b lying opposite one another.
  • the respective battery cells 3 are stacked with the respective main surfaces 5a and 5b facing each other in a stacking direction 6 to form a stack 7.
  • only two battery cells 3 stacked together are shown for clarity.
  • the battery cell arrangement 2 can also have a plurality of battery cells 3 stacked on one another in the same way.
  • the current conductors 8 of the electrical poles of the battery cells 3 extend perpendicular to the stacking direction 6.
  • the battery cells 3 are pouch cells 4, each of which has a sealing seam 9 extending perpendicular to the stacking direction.
  • the battery cell arrangement 2 also has a temperature control arrangement 10 with a plurality of fluid channels 11 a and 11 b — only one fluid channel 11 a and one fluid channel 11 b shown here in each case — through which a fluid can flow.
  • the respective fluid channel 11 a and 11 b is on the adjacent battery cells 3 and in this exemplary embodiment between the sealing seams 9 of the adjacent battery cells 3 arranged.
  • the temperature control arrangement 10 is formed by a flexible film loop 16 - here a flexible film tube 16.
  • the flexible film tube 16 is arranged with a longitudinal section 12 between the battery cells 3 in order to provide the battery cell arrangement 2.
  • wall areas 13a and 13b of the film tube 16 are applied to the respective flat surfaces 5a and 5b of the adjacent battery cells 3.
  • the film tube 16 has a further wall area 14a and 14b between the two wall areas 13a and 13b.
  • the wall areas 13a and 13b alternate with the wall areas 14a and 14b in the circumferential direction of the film tube 16 and adjoin one another.
  • the wall regions 14a and 14b are not in contact with the main surfaces 5a and 5b of the battery cells 3. 2, the film tube 16 is pressed in the longitudinal section 12 in the stacking direction 6 between the adjacent battery cells 3.
  • the two wall areas 13a and 13b are placed against each other.
  • the film tube 16 projects with the wall areas 14a and 14b perpendicular to the stacking direction 6, so that the wall areas 14a and 14b each form a loop 15a and 15b during pressing.
  • the loop 15a and 15b forms the respective fluid channel 11a and 11b of the temperature control arrangement 10.
  • the longitudinal section 12 of the flexible film tube 16 is accordingly arranged between the battery cells 3 and bears against the main surfaces 5a and 5b of the adjacent battery cells 3 with the respective wall areas 13a and 13b.
  • the film tube 16 is pressed in the longitudinal section 12 in the stacking direction 6 between the adjacent battery cells 3 in such a way that the wall regions 14a and 14b each form the loop 15a and 15b and thereby each the fluid channel 11a and 11b.
  • the respective fluid channel 1 1 a and 1 1 b rests on the battery cells 3 and on the respective sealing seams 9 due to the flexibility of the foil tube 16, so that the heat transfer between the fluid in the respective fluid channel 1 1 a and 1 1 b and the respective battery cells 3 is improved.
  • the two wall areas 13a and 13b are fixed to one another in a fluid-tight manner in a connection area 17, for example thermally welded to one another.
  • the connection area 17 expediently has a smaller geometric area than the two flap areas 5a and 5b, so that any tolerances that may exist in the dimensions and shapes of the adjacent battery cells 3 are compensated for.
  • the two wall areas 13a and 13b can remain pressed together in a fluid-tight manner.
  • the battery cell arrangement 2 has a heat-conducting heat-conducting plate 18 which is arranged between the wall regions 13a and 13b of the film tube 16 is.
  • the heat-conducting plate 18 protrudes in some areas into the fluid channels 1 1 a and 1 1 b in order to intensify the heat transfer between the main surfaces 5 a and 5 b of the adjacent battery cells 3 and the fluid in the respective fluid channel 1 1 a and 1 1 b.
  • the heat-conducting plate 18 here represents a so-called fleat spreader and improves the heat transfer between the flap surfaces 5a and 5b of the adjacent battery cells 3 and the fluid in the respective fluid channel 1 1 a and 1 1 b.
  • the heat-conducting plate 18 is a metal sheet with a wave-like structure 18a.
  • FIG. 4 shows a sectional view of the further, differently configured battery cell arrangement 2.
  • the battery cell arrangement 2 has a different from the battery cell arrangement 2 in FIG. 3, an elastically deformable compression mat. te 19, which partially surrounds the heat-conducting plate 18.
  • the compression mat 19 can compensate for tolerances between the adjacent battery cells 3 - and in particular process-related tolerances between the pouch cells 4.
  • FIG. 5 shows a sectional view of the further, differently designed battery cell arrangement 2.
  • the battery cell arrangement 2 here has a reinforcement zone 20 which is arranged in the wall region 14a.
  • the wall region 14a has a greater thickness in the reinforcement zone 20.
  • a border strip 21 is arranged in the wall area 14b, which limits the extent of the wall area 14b.
  • Both the reinforcement zone 20 and the border strip 21 limit the expansion of the wall regions 14a and 14b of the film tube 16 perpendicular to the stacking direction 6 and support the expansion of the wall regions 14a and 14b of the film tube 16 in the stacking direction 6 towards the sealed seams 9 of the adjacent battery cells 3.
  • the respective fluid channel 11 a and 11 b bears against a larger surface of the adjacent battery cells 3 to be temperature-controlled, as a result of which the temperature control of the battery cells 3 is improved.
  • FIG. 6 shows a sectional view of the further, differently configured battery cell arrangement 2.
  • the battery cell arrangement 2 here has a reinforcement element 22 which is integrated in the wall region 14a of the film tube 16 and thereby the reinforcement zone 20 forms.
  • the fluid channel 11b there is a border insert 23 - here a pleated clip - which limits the extent of the wall area 14b.
  • Both the reinforcing element 22 and the limit insert 23 limit the extent of the wall regions 14a and 14b of the film tube 16 perpendicular to the stacking direction 6 and below support the expansion of the wall areas 14a and 14b of the film tube 16 in the stacking direction 6 towards the sealing seams 9 of the adjacent battery cells 3.
  • the respective fluid channel 11 a and 11 b bears against a larger area of the adjacent battery cells 3 to be temperature-controlled, as a result of which the temperature control of the battery cells 3 is intensified.
  • the temperature control arrangement 10 and thereby the battery cell arrangement 2 according to the invention can be manufactured inexpensively.
  • the respective fluid channels 11 a and 11 b are better connected to the battery cells 3 to be cooled, as a result of which the temperature control of the battery cells 3 is more efficient.
  • the heat transfer between the battery cells 3 and the fluid can be further improved by the heat-conducting plate 18.
  • both the installation space requirement and the weight of the temperature control arrangement 10 and thereby also the battery cell arrangement 2 are advantageously reduced.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

The invention relates to a battery cell arrangement (2) having a plurality of battery cells (3), in particular having a plurality of pouch cells (4). The plurality of battery cells (3) in this case each have two main faces (5a, 5b) opposite one another and, with the respective main faces (5a, 5b) facing one another, are stacked in a stacking direction (6) to form a stack (7). Current collectors (8) of electrical poles of the plurality of battery cells (3) extend in this case on two opposite collector sides of the respective battery cells (3) perpendicularly to the stacking direction (6). The battery cell arrangement (2) also has a temperature-control arrangement (10) having at least one fluid channel (11a, 11b), through which a fluid is able to flow and which is arranged on the adjacent battery cells (3). According to the invention, the temperature-control arrangement (10) is formed by a flexible film loop (16), wherein at least one longitudinal section (12) of the flexible film loop (16) is arranged between two adjacent battery cells (3) and bears against the main faces (5a, 5b) of the respective adjacent battery cells (2) by way of a respective wall region (13a, 13b). In addition, the flexible film loop (16) is pressed in the at least one longitudinal section (12) in the stacking direction (6) between the adjacent battery cells (3) in such a way that at least one further wall region (14a, 14b) forms a loop (15a, 15b) and as a result the at least one fluid channel (11a, 11b) of the temperature-control arrangement (10) is formed. The invention also relates to a method (1) for producing the battery cell arrangement (2).

Description

Batteriezellenanordnung und ein Verfahren zum Herstellen der Batteriezellenanordnung  Battery cell arrangement and a method for producing the battery cell arrangement

Die Erfindung betrifft eine Batteriezellenanordnung mit mehreren Batteriezellen, insbesondere mit mehreren Pouch-Zellen, gemäß dem Oberbegriff des An- spruchs 1. Die Erfindung betrifft auch ein Verfahren zum Herstellen der Batterie- zellenanordnung. The invention relates to a battery cell arrangement with a plurality of battery cells, in particular with a plurality of pouch cells, according to the preamble of claim 1. The invention also relates to a method for producing the battery cell arrangement.

Um Batteriezellen und insbesondere Li-Ionen-Batteriezellen vor einer zu schnel- len Alterung zu schützen, müssen diese zwingend gekühlt und beheizt werden können. Dazu wird für die Batteriezellen üblicherweise eine Kühl- oder Heizan- ordnung vorgesehen. Aus dem Stand der Technik sind unterschiedliche Kühl- oder Heizanordnungen bereits bekannt. So beschreibt beispielweise In order to protect battery cells and in particular Li-ion battery cells from rapid aging, it must be possible to cool and heat them. For this purpose, a cooling or heating arrangement is usually provided for the battery cells. Different cooling or heating arrangements are already known from the prior art. For example, describes

US 9,546,827 B2 eine Kühlanordnung, die eine mit Fluid durchströmbare Hart- schale und einen flexiblen Deckel zum Verschließen der Hartschale aufweist. Die Kühlanordnung wird dabei an einem Batteriemodul aus mehreren Batteriezellen wärmeübertragend angeordnet und die Batteriezellen bei Bedarf gekühlt. No. 9,546,827 B2 discloses a cooling arrangement which has a hard shell through which fluid can flow and a flexible cover for closing the hard shell. The cooling arrangement is arranged on a battery module comprising a plurality of battery cells in a heat-transferring manner and the battery cells are cooled if necessary.

US 9,666,912 B2 beschreibt eine Kühlanordnung mit einem flexiblen Beutel, der wärmeübertragend an ein Batteriemodul aus mehreren Batteriezellen angelegt und mit den Batteriezellen wärmeübertragend gekoppelt wird. In  US Pat. No. 9,666,912 B2 describes a cooling arrangement with a flexible bag which is applied to a battery module comprising a plurality of battery cells in a heat-transferring manner and is coupled to the battery cells in a heat-transferring manner. In

US 2017/0194679 A1 ist eine Kühlanordnung beschrieben, die eine mehrschich- tige Kühlpatte mit in die Kühlplatte integrierten Pfaden zum Ableiten der Abwärme von einem Batteriemodul aufweist. Alternativ oder zusätzlich können beispiels- weise Metallbleche zwischen den Batteriezellen in dem Batteriemodul verspannt werden, um auch von dort die Abwärme abzuführen. US 2017/0194679 A1 describes a cooling arrangement which has a multi-layer cooling plate with paths integrated in the cooling plate for removing the waste heat from a battery module. As an alternative or in addition, metal sheets, for example, can be clamped between the battery cells in the battery module in order to also dissipate the waste heat from there.

Hybrid- oder Elektrofahrzeuge weisen öfter große Batteriemodule auf, um den Anforderungen an die hohe Reichweite und die hohe Schnellladefähigkeit zu er- füllen. Die aktuellen Kühl- oder Heizanordnungen sind dabei vorzugsweise unter den Batteriemodulen montiert und benötigen viel Bauraum. Ferner ist bei den aus dem Stand der Technik bekannten Kühl- oder Heizanordnungen der Kontaktwi- derstand zwischen der Kühl- oder Heizanordnung und den einzelnen Batteriezel- len in dem Batteriemodul zu hoch. Dieses wird öfters durch thermische Inter facematerialien - wie beispielsweise Gapfiller - reduziert. Dies führt jedoch zur Verlängerung des Wärmeleitpfades und zur Kosten- sowie Gewichtserhöhung der Batteriemodule. Hybrid or electric vehicles often have large battery modules in order to meet the requirements for long range and high rapid charging capacity. The current cooling or heating arrangements are preferably below the battery modules and require a lot of installation space. Furthermore, in the cooling or heating arrangements known from the prior art, the contact resistance between the cooling or heating arrangement and the individual battery cells in the battery module is too high. This is often reduced by thermal interface materials such as gap fillers. However, this leads to the lengthening of the heat conduction path and to the cost and weight increase of the battery modules.

Die Aufgabe der Erfindung ist es daher, für eine Batteriezellenanordnung der gat- tungsgemäßen Art eine verbesserte oder zumindest alternative Ausführungsform anzugeben, bei der die beschriebenen Nachteile überwunden werden. Ferner soll ein Verfahren zum Herstellen der Batteriezellenanordnung angegeben werden. The object of the invention is therefore to provide an improved or at least alternative embodiment for a battery cell arrangement of the generic type in which the disadvantages described are overcome. Furthermore, a method for producing the battery cell arrangement is to be specified.

Diese Aufgabe wird erfindungsgemäß durch den Gegenstand der unabhängigen Ansprüche gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhän- gigen Ansprüche. This object is achieved according to the invention by the subject matter of the independent claims. Advantageous embodiments are the subject of the dependent claims.

Eine gattungsgemäße Batteriezellenanordnung weist mehrere Batteriezellen, insbesondere mehrere Pouch-Zellen, auf. Die mehreren Batteriezellen weisen jeweils zwei einander gegenüberliegende Hauptflächen auf und sind mit den je- weiligen Hauptflächen einander zugewandt in einer Stapelrichtung zu einem Sta- pel gestapelt. Dabei erstrecken sich Stromableiter elektrischer Pole der mehreren Batteriezellen senkrecht zur Stapelrichtung. Die Batteriezellenanordnung weist ferner eine Temperierungsanordnung mit wenigstens einem von einem Fluid durchströmbaren Fluidkanal auf, der an den benachbarten Batteriezellen ange- ordnet ist. Erfindungsgemäß ist die Temperierungsanordnung durch eine flexible Folienschlinge gebildet. Dabei ist wenigstens ein Längsabschnitt der flexiblen Folienschlinge zwischen zwei benachbarten Batteriezellen angeordnet und liegt an den Hauptflächen der jeweiligen benachbarten Batteriezellen mit jeweils ei- nem Wandungsbereich an. Ferner ist die flexible Folienschlinge in dem wenigs- tens einen Längsabschnitt in Stapelrichtung zwischen den benachbarten Batte- riezellen derart verpresst, dass wenigstens ein weiterer zwischen seinen an den Flauptflächen anliegenden Wandungsbereichen angeordneter Wandungsbereich eine geschlossene Schlinge bildet und dadurch der wenigstens eine Fluidkanal der Temperierungsanordnung gebildet ist. A generic battery cell arrangement has several battery cells, in particular several pouch cells. The multiple battery cells each have two opposing main surfaces and are stacked with the respective main surfaces facing one another in a stacking direction to form a stack. Current arresters of electrical poles of the plurality of battery cells extend perpendicular to the stacking direction. The battery cell arrangement also has a temperature control arrangement with at least one fluid channel through which a fluid can flow and which is arranged on the adjacent battery cells. According to the tempering arrangement is formed by a flexible film loop. At least one longitudinal section of the flexible film loop is arranged between two adjacent battery cells and lies on the main surfaces of the respective adjacent battery cells, each with a wall area. Furthermore, the flexible film loop is pressed in the at least one longitudinal section in the stacking direction between the adjacent battery cells in such a way that at least one further wall area arranged between its wall areas lying against the flap areas forms a closed loop and the at least one fluid channel of the temperature control arrangement is thereby formed ,

Unter der flexiblen Folienschlinge ist dabei eine endlose einmal in Längsrichtung umgeschlagene Folienbahn zu verstehen, die verformbar ist und kein festes Querschnittsprofil aufweist. Die flexible Folienschlinge ist dadurch in Längsrich- tung biegsam und ihr Querschnittsprofil ist veränderbar. In der erfindungsgemä- ßen Batteriezellenanordnung ist der wenigstens eine Fluidkanal durch die ge- schlossene Schlinge in der flexiblen Folienschlinge gebildet, wodurch der wenigs- tens eine Fluidkanal keine Verbindungsnähte - wie beispielweise Schweiß- oder Siegelnähte - aufweist. Insbesondere kann dadurch eine Leckage in dem we- nigstens einen Fluidkanal effektiv verhindert werden. Der wenigstens eine Fluid kanal ist durch die geschlossene Schlinge und dadurch ausschließlich durch den zwischen den an den Hauptflächen anliegenden Wandungsbereichen angeordne- ten Wandungsbereich des Längsabschnitts gebildet. Der Fluidkanal ist geschlos- sen und nur innerhalb der geschlossenen Schlinge und somit des zwischen sei- nen an den Hauptflächen anliegenden Wandungsbereichen angeordneten Wan- dungsbereichs durchströmbar. Mit anderen Worten findet zwischen den beiden an den Hauptflächen der Batteriezellen anliegenden Wandungsbereichen bzw. zwischen den Hauptflächen der benachbarten Batteriezellen kein Strömen des Fluids statt. Ferner legt sich der wenigstens eine Fluidkanal aufgrund der Flexibi- lität der Folienschlinge beim Durchströmen mit einem Fluid an die zu temperie- renden Batteriezellen an, so dass der thermische Kontaktwiderstand zwischen den zu temperierenden Batteriezellen und einem in dem wenigstens einen Fluid kanal strömenden Fluid vorteilhaft reduziert wird und die Batteriezellen effektiv temperiert werden können. Vorteilhafterweise können auch der für die Temperie- rungsanordnung benötigte Bauraum und das Gewicht der Batteriezellenanord- nung reduziert werden. The flexible film loop is to be understood as an endless film web that has been folded over in the longitudinal direction and is deformable and has no fixed cross-sectional profile. The flexible film loop is therefore flexible in the longitudinal direction and its cross-sectional profile can be changed. In the battery cell arrangement according to the invention, the at least one fluid channel is formed by the closed loop in the flexible film loop, as a result of which the at least one fluid channel has no connecting seams, such as, for example, welded or sealed seams. In particular, this can effectively prevent leakage in the at least one fluid channel. The at least one fluid channel is formed by the closed loop and therefore exclusively by the wall area of the longitudinal section arranged between the wall areas adjacent to the main areas. The fluid channel is closed and can only be flowed through within the closed loop and thus in the wall area arranged between its wall areas adjacent to the main surfaces. In other words, there is no flow of the fluid between the two wall areas lying on the main surfaces of the battery cells or between the main surfaces of the adjacent battery cells. Furthermore, due to the flexibility of the film loop, when flowing through a fluid, the at least one fluid channel contacts the battery cells to be temperature-controlled, so that the thermal contact resistance between the battery cells to be temperature-controlled and a fluid flowing in the at least one fluid channel is advantageously reduced becomes effective and the battery cells can be tempered. The installation space required for the temperature control arrangement and the weight of the battery cell arrangement can advantageously also be reduced.

Grundsätzlich kann die Batteriezellenanordnung unterschiedliche Arten der Batte- riezellen aufweisen, weist jedoch insbesondere Pouch-Zellen auf. Bei den Pouch- Zellen - die grundsätzlich keine feste Form aufweisen - kann sich der wenigs- tens eine Fluidkanal an die den Fluidkanal umgebende Oberfläche zwischen den Siegelnahten der benachbarten Batteriezellen anlegen, so dass das Temperieren der Pouch-Zellen - und insbesondere die Wärmeabfuhr aus den Pouch-Zellen - verbessert wird. Die Siegelnähte der einzelnen Pouch-Zellen können dabei so- wohl umgeschlagen als auch nicht umgeschlagen werden. Grundsätzlich ist ein Umschlagen der Siegelnähte nicht notwendig, was ein homogenes Temperieren der Pouch-Zellen ermöglicht. In principle, the battery cell arrangement can have different types of battery cells, but in particular has pouch cells. In the case of the pouch cells - which generally have no fixed shape - the at least one fluid channel can contact the surface surrounding the fluid channel between the sealed seams of the adjacent battery cells, so that the temperature of the pouch cells - and in particular the heat dissipation from the Pouch cells - is improved. The sealed seams of the individual pouch cells can either be turned over or not turned over. In principle, the sealing seams do not have to be turned over, which enables the pouch cells to be tempered homogeneously.

Vorteilhafterweise kann die flexible Folienschlinge nur einseitig die geschlossene Schlinge an den benachbarten Batteriezellen bilden. In diesem Fall schließen die an den jeweiligen Flauptflächen anliegenden Wandungsbereiche an den den we- nigstens einen Fluidkanal bildenden Wandungsbereich in Querrichtung der flexib- len Folienschlinge an. Alternativ kann vorteilhafterweise vorgesehen sein, dass an den benachbarten Batteriezellen beidseitig jeweils ein weiterer zwischen den an den Flauptflächen anliegenden Wandungsbereichen angeordneter Wan- dungsbereich der flexiblen Folienschlinge eine geschlossene Schlinge bildet und dadurch beidseitig an den benachbarten Batteriezellen jeweils ein Fluidkanal der Temperierungsanordnung gebildet ist. In diesem Fall können die benachbarten Batteriezellen beidseitig durch das Fluid in den beiden Fluidkanälen temperiert werden. Bei einer Weiterbildung der erfindungsgemäßen Batteriezellenanordnung ist vor- gesehen, dass die an den jeweiligen Hauptflächen anliegenden Wandungsberei- che der flexiblen Folienschlinge in dem wenigstens einen Längsabschnitt fluid- dicht aneinander festgelegt sind. Dadurch liegt der wenigstens eine Fluidkanal außenseitig an den benachbarten Batteriezellen an und zwischen den benach- barten Batteriezellen findet kein Durchströmen des Fluids statt. Insbesondere kann dadurch die Baugröße der Batteriezellenanordnung in Stapelrichtung redu- ziert werden. Sind die Fluidkanäle beidseitig an den benachbarten Batteriezellen gebildet, so können diese dadurch fluidisch voneinander getrennt sein. Bei dieser Ausführungsform der Batteriezellenanordnung können die beiden Fluidkanäle unabhängig von dem Material der flexiblen Folienschlinge durch ein Verpressen voneinander getrennt sein. Advantageously, the flexible film loop can form the closed loop on the adjacent battery cells only on one side. In this case, the wall areas adjacent to the respective flap surfaces adjoin the wall area forming the at least one fluid channel in the transverse direction of the flexible film loop. Alternatively, it can advantageously be provided that on both sides of the adjacent battery cells, a further wall area of the flexible film loop arranged between the wall areas lying on the flap surfaces forms a closed loop, thereby forming a fluid channel of the temperature control arrangement on both sides of the adjacent battery cells. In this case, the adjacent battery cells can be tempered on both sides by the fluid in the two fluid channels. In a further development of the battery cell arrangement according to the invention, it is provided that the wall areas of the flexible film loop resting on the respective main surfaces are fixed to one another in a fluid-tight manner in the at least one longitudinal section. As a result, the at least one fluid channel lies on the outside against the adjacent battery cells and there is no flow of the fluid between the adjacent battery cells. In particular, the size of the battery cell arrangement in the stacking direction can thereby be reduced. If the fluid channels are formed on both sides of the adjacent battery cells, they can be fluidly separated from one another as a result. In this embodiment of the battery cell arrangement, the two fluid channels can be separated from one another by pressing, regardless of the material of the flexible film loop.

Vorteilhafterweise kann vorgesehen sein, dass die an den jeweiligen Hauptflä- chen anliegenden Wandungsbereiche der flexiblen Folienschlinge in dem wenigs- tens einen Längsabschnitt in einem Verbindungsbereich aneinander stoffschlüs- sig festgelegt sind. Vorzugsweise sind die beiden Wandungsbereiche thermisch miteinander verschweißt, wozu das Material der flexiblen Folienschlinge zweck- gemäß thermisch verbindungsfähig ist. Zusätzlich kann vorgesehen sein, dass eine geometrische Fläche des Verbindungsbereichs kleiner als eine geometri- sche Fläche der jeweiligen Hauptflächen der benachbarten Batteriezellen ist. Dadurch können möglicherweise vorliegende Toleranzen in Abmessungen und in Formen der benachbarten Batteriezellen - und insbesondere der benachbarten Pouch-Zellen - ausgeglichen werden. Der wenigstens eine Fluidkanal kann sich dadurch wärmeübertragend an die benachbarten Batteriezellen anlegen und das Temperieren der Batteriezellen verbessert werden. Advantageously, it can be provided that the wall areas of the flexible film loop that are in contact with the respective main surfaces are firmly bonded to one another in the at least one longitudinal section in a connection area. The two wall areas are preferably thermally welded to one another, for which purpose the material of the flexible film loop is expediently thermally connectable. In addition, it can be provided that a geometric area of the connection area is smaller than a geometric area of the respective main areas of the adjacent battery cells. This allows any tolerances in dimensions and shapes of the neighboring battery cells - and in particular the neighboring pouch cells - to be compensated for. The at least one fluid channel can thereby transfer heat to the adjacent battery cells and the temperature of the battery cells can be improved.

Bei einer bevorzugten Ausgestaltung der Batteriezellenanordnung ist vorgese- hen, dass die flexible Folienschlinge aus einem dehnbaren Material geformt ist. Dadurch kann sich der den Fluidkanal bildende Wandungsbereich der flexiblen Folienschlinge in dem wenigstens einen Längsabschnitt beim Durchströmen mit einem Fluid ausdehnen und der Fluidkanal kann sich an die jeweiligen benach- barten Batteriezellen anlegen. Dadurch kann insbesondere der Wärmeleitpfad verkürzt und die Wärmeübertragung zwischen den Batteriezellen und dem Fluid intensiviert werden. Dabei kann die Ausdehnung des den Fluidkanal bildenden Wandungsbereichs der flexiblen Folienschlinge auch bereichsweise begrenzt werden, um einerseits das Anlegen des wenigstens einen Fluidkanals an den benachbarten Batteriezellen zu ermöglichen und andererseits um eine zu starke Ausdehnung des den Fluidkanal bildenden Wandungsbereichs zu vermeiden. In a preferred embodiment of the battery cell arrangement, it is provided that the flexible film loop is formed from a stretchable material. As a result, the wall area of the flexible film loop forming the fluid channel can expand in the at least one longitudinal section when a fluid flows through it, and the fluid channel can contact the respective adjacent battery cells. As a result, the heat conduction path in particular can be shortened and the heat transfer between the battery cells and the fluid can be intensified. The extent of the wall area of the flexible film loop forming the fluid channel can also be limited in some areas, on the one hand to allow the at least one fluid channel to be applied to the adjacent battery cells and on the other hand to avoid excessive expansion of the wall area forming the fluid channel.

Dazu kann beispielweise vorgesehen sein, dass die flexible Folienschlinge zu- mindest bereichsweise in einer Verstärkungszone des den Fluidkanal bildenden Wandungsbereichs verstärkt ist. So kann der den Fluidkanal bildende Wan- dungsbereich in der Verstärkungszone beispielweise eine höhere Dicke oder ein integriertes Verstärkungselement aufweisen und dadurch weniger elastisch be- ziehungsweise flexibel sein. Alternativ oder zusätzlich kann an dem wenigstens einen Fluidkanal zwischen den benachbarten Batteriezellen eine Grenzleiste festgelegt sein, die beispielweise aus einem nicht flexiblen Material geformt ist. Alternativ oder zusätzlich kann in dem wenigstens einen Fluidkanal eine Grenz- einlage - beispielweise eine Halteklammer - angeordnet sein, die beispielweise aus einem nicht flexiblen Material geformt ist. Die Verstärkungszone und/oder die Grenzleiste und/oder die Grenzeinlage können dabei eine Ausdehnung des den Fluidkanal bildenden Wandungsbereichs der flexiblen Folienschlinge senkrecht zur Stapelrichtung von den benachbarten Batteriezellen hinweg begrenzen und in Stapelrichtung zu den benachbarten Batteriezellen hin unterstützen. Dadurch legt sich der wenigstens eine Fluidkanal an einer größeren zu temperierenden Ober- fläche der benachbarten Batteriezellen an, wodurch das Temperieren der Batte- riezellen verbessert ist. Vorteilhafterweise kann vorgesehen sein, dass eine wärmeleitende Wärmeleit- platte zwischen den beiden an den Hauptflächen der benachbarten Batteriezellen anliegenden Wandungsbereichen der flexiblen Folienschlinge angeordnet ist. Die Wärmeleitplatte ragt dabei bereichsweise in den wenigstens einen Fluidkanal hinein, um die Wärme zwischen den Hauptflächen der benachbarten Batteriezel- len und dem Fluid in dem Fluidkanal zu leiten. Auf diese vorteilhafte Weise kön- nen die Batteriezellen nicht nur außenliegend temperiert, sondern auch die Hauptflächen der Batteriezellen gekühlt oder erwärmt werden. Die Wärmeleitplat- te stellt hier einen sogenannten Heatspreader dar und verbessert die Wärme- Übertragung zwischen den Hauptflächen der jeweiligen benachbarten Batteriezel- len und dem Fluid in dem wenigstens einen Fluidkanal. Die Wärmeleitplatte be- steht zweckgemäß aus einem wärmeleitenden Material und kann beispielweise metallisch sein. Um die Wärmeübertragung zwischen dem Fluid und den jeweil i- gen Hauptflächen zu intensivieren, kann die Wärmeleitplatte eine Struktur - bei spielweise eine Prägung - zum Vergrößern einer Oberfläche der Wärmeleitplatte aufweisen. Zudem kann dadurch auch der den Wärmeübergangskoeffizient er- höht werden. Alternativ oder zusätzlich kann die Wärmeleitplatte zumindest be- reichsweise von einer Kompressionsmatte aus einem elastischen Material zum Ausgleich von Toleranzen zwischen den benachbarten Batteriezellen - und ins- besondere prozessbedingte Toleranzen zwischen den Pouch-Zellen - umgeben sein. So können dadurch beispielweise durch thermische und ladezustandsbe- dingte Ausdehnung der Batteriezellen bedingte Toleranzen ausgeglichen werden und eine lokale Überbelastung der Batteriezelle verhindert werden. For this purpose it can be provided, for example, that the flexible film loop is reinforced at least in some areas in a reinforcement zone of the wall region forming the fluid channel. For example, the wall area forming the fluid channel in the reinforcement zone can have a greater thickness or an integrated reinforcement element and can therefore be less elastic or flexible. Alternatively or additionally, a border strip can be fixed to the at least one fluid channel between the adjacent battery cells, which is formed, for example, from a non-flexible material. Alternatively or additionally, a border insert - for example a retaining clip - can be arranged in the at least one fluid channel, which is formed for example from a non-flexible material. The reinforcement zone and / or the border strip and / or the border insert can limit an expansion of the wall area of the flexible film loop forming the fluid channel perpendicular to the stacking direction away from the adjacent battery cells and support it in the stacking direction towards the adjacent battery cells. As a result, the at least one fluid channel contacts a larger surface to be tempered of the adjacent battery cells, which improves the temperature control of the battery cells. Provision can advantageously be made for a heat-conducting heat-conducting plate to be arranged between the two wall regions of the flexible film loop which bear against the main surfaces of the adjacent battery cells. The heat-conducting plate projects in some areas into the at least one fluid channel in order to conduct the heat between the main surfaces of the adjacent battery cells and the fluid in the fluid channel. In this advantageous manner, the battery cells can not only be tempered externally, but also the main surfaces of the battery cells can be cooled or heated. The heat-conducting plate represents a so-called heat spreader and improves the heat transfer between the main surfaces of the respective neighboring battery cells and the fluid in the at least one fluid channel. The heat conducting plate expediently consists of a heat conducting material and can for example be metallic. In order to intensify the heat transfer between the fluid and the respective main surfaces, the heat-conducting plate can have a structure - for example an embossing - for enlarging a surface of the heat-conducting plate. In addition, the heat transfer coefficient can also be increased. Alternatively or additionally, the heat-conducting plate can be at least partially surrounded by a compression mat made of an elastic material to compensate for tolerances between the neighboring battery cells - and in particular process-related tolerances between the pouch cells. In this way, for example, tolerances caused by thermal and state of charge expansion of the battery cells can be compensated for and local overloading of the battery cell prevented.

Vorteilhafterweise kann vorgesehen sein, dass die flexible Folienschlinge ein endloser Folienschlauch ohne Fügestellen ist. Dadurch kann insbesondere das Risiko einer Leckage minimiert werden und das Herstellen der Batteriezellenano- rdnung vereinfacht werden. Die flexible Folienschlinge kann beispielweise aus einer Verbundfolie geformt sein, die bevorzugt eine Außenschicht, eine Diffusi- onssperrschicht und eine Außenschicht aufweist. Die Außenschicht und die In- nenschicht können aus unterschiedlichen Thermoplasten und die Diffusions- sperrschicht aus Aluminium bestehen. Der Thermoplast der Innenschicht kann dabei eine niedrigere Schmelztemperatur als der Thermoplast der Außenschicht aufweisen, um eine Versiegelung der Diffusionssperrschicht zu ermöglichen. Die Diffusionssperrschicht sorgt dabei für eine niedrige Permeation beziehungsweise Diffusion von Molekülen des Fluid aus dem wenigstens einen Fluidkanal nach außen. Die flexible Folienschlinge kann alternativ aus einem Elastomer oder aus einem Kunststoff mit einer geringen Permeation geformt sein. Alternativ oder zu- sätzlich dazu kann die flexible Folienschlinge aus einer Kunststofffolie mit brand- hemmenden Zusätzen geformt sein. Die brandhemmenden Zusätze können bei spielweise Triphenylphosphat (TPP) oder bromiertes Polystyrol (PS) sein. Die flexible Folienschlinge kann alternativ oder zusätzlich aus einem nicht oder schwer brennenden Kunststoff, bevorzugt aus Polyvinylchlorid (PVC) oder Poly- tetrafluorethylen (PTFE), geformt sein. It can advantageously be provided that the flexible film loop is an endless film tube without joints. This in particular minimizes the risk of leakage and simplifies the production of the battery cell arrangement. The flexible film loop can be made of, for example be formed of a composite film, which preferably has an outer layer, a diffusion barrier layer and an outer layer. The outer layer and the inner layer can consist of different thermoplastics and the diffusion barrier layer of aluminum. The thermoplastic of the inner layer can have a lower melting temperature than the thermoplastic of the outer layer in order to enable the diffusion barrier layer to be sealed. The diffusion barrier layer ensures a low permeation or diffusion of molecules of the fluid from the at least one fluid channel to the outside. The flexible film loop can alternatively be formed from an elastomer or from a plastic with a low permeation. Alternatively or in addition to this, the flexible film loop can be formed from a plastic film with fire-retardant additives. The fire retardant additives can be triphenyl phosphate (TPP) or brominated polystyrene (PS). As an alternative or in addition, the flexible film loop can be formed from a non-burning or hardly burning plastic, preferably from polyvinyl chloride (PVC) or polytetrafluoroethylene (PTFE).

Bei einer Weiterbildung der Batteriezellenanordnung ist vorgesehen, dass der durch die geschlossene Schlinge gebildete Fluidkanal der Temperierungsanord- nung in einen Sammler und/oder in einen Verteiler fluidisch einmündet. In a further development of the battery cell arrangement, it is provided that the fluid channel of the temperature control arrangement formed by the closed loop fluidly opens into a collector and / or into a distributor.

Zusammenfassend sind die Temperierungsanordnung und dadurch die erfin- dungsgemäße Batteriezellenanordnung kostengünstig herstellbar. Der wenigs- tens eine Fluidkanal ist dabei besser an die zu kühlenden Batteriezellen ange- bunden, wodurch das Temperieren der Batteriezellen verbessert ist. Durch eine Wärmeleitplatte kann die Wärmeübertragung zwischen den Batteriezellen und dem Fluid weiter verbessert werden. Ferner weist die Temperierungsanordnung in der erfindungsgemäßen Batteriezellenanordnung einen reduzierten Bauraum- bedarf auf und das Gewicht der Batteriezellenanordnung ist vorteilhaft reduziert. Die Erfindung betrifft auch ein Verfahren zum Herstellen der oben beschriebenen Batteriezellenanordnung. Dabei wird zuerst die flexible Folienschlinge mit dem wenigstens einen Längsabschnitt zwischen den benachbarten Batteriezellen an- geordnet und die jeweiligen Wandungsbereiche der flexiblen Folienschlinge wer- den an den jeweiligen Hauptflächen der jeweiligen benachbarten Batteriezellen angelegt. Dann wird die flexible Folienschlinge in dem wenigstens einen Längs- abschnitt in Stapelrichtung zwischen den benachbarten Batteriezellen verpresst, so dass der wenigstens eine weitere zwischen den an den Hauptflächen anlie- genden Wandungsbereichen angeordnete Wandungsbereich der flexiblen Foli- enschlinge eine Schlinge bildet und dadurch der wenigstens eine Fluidkanal der Temperierungsanordnung gebildet wird. Beim Herstellen der Batteriezellenano- rdnung kann folglich die Temperierungsanordnung gleich beim Verpressen der Batteriezellen in Stapelrichtung an dem Stapel festgelegt werden, wodurch ein zusätzlicher Fertigungsschritt entfällt. Ferner ist die Temperierungsanordnung kostengünstig herstellbar, da beim Herstellen der Batteriezellenanordnung Halb- zeuge umgeformt werden. In summary, the temperature control arrangement and thereby the battery cell arrangement according to the invention can be produced inexpensively. The at least one fluid channel is better connected to the battery cells to be cooled, as a result of which the temperature of the battery cells is improved. The heat transfer between the battery cells and the fluid can be further improved by a heat conducting plate. Furthermore, the temperature control arrangement in the battery cell arrangement according to the invention has a reduced space requirement and the weight of the battery cell arrangement is advantageously reduced. The invention also relates to a method for producing the battery cell arrangement described above. First, the flexible film loop with the at least one longitudinal section is arranged between the adjacent battery cells and the respective wall areas of the flexible film loop are placed on the respective main surfaces of the respective adjacent battery cells. The flexible film loop is then pressed in the at least one longitudinal section in the stacking direction between the adjacent battery cells, so that the at least one further wall area of the flexible film loop arranged between the wall areas adjacent to the main surfaces forms a loop and thereby the at least one Fluid channel of the tempering arrangement is formed. When producing the battery cell arrangement, the temperature control arrangement can consequently be fixed to the stack immediately when the battery cells are pressed in the stack direction, as a result of which an additional production step is omitted. Furthermore, the temperature control arrangement can be produced inexpensively, since semifinished products are formed when the battery cell arrangement is manufactured.

Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Un- teransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschrei- bung anhand der Zeichnungen. Further important features and advantages of the invention result from the subclaims, from the drawings and from the associated description of the figures with reference to the drawings.

Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, son- dern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, oh- ne den Rahmen der vorliegenden Erfindung zu verlassen. It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the respectively specified combination but also in other combinations or on their own without leaving the scope of the present invention.

Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen darge- stellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Kompo- nenten beziehen. Preferred exemplary embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description, wherein the same reference numerals refer to the same or similar or functionally identical components.

Es zeigen, jeweils schematisch It shows, each schematically

Fig. 1 und 2 Herstellungsschritte in einem erfindungsgemäßen Verfahren zum 1 and 2 manufacturing steps in a method according to the invention for

Herstellen einer erfindungsgemäßen Batteriezellenanordnung;  Manufacture of a battery cell arrangement according to the invention;

Fig. 3 bis 6 Schnittansichten abweichend ausgestalteten erfindungsgemäßen 3 to 6 sectional views of differently designed according to the invention

Batteriezellenanordnungen.  Battery cell assemblies.

Fig. 1 und Fig. 2 zeigen Herstellungsschritte in einem erfindungsgemäßen Ver- fahren 1 zum Herstellen einer erfindungsgemäßen Batteriezellenanordnung 2, die hier teilweise und im Schnitt gezeigt ist. Die erfindungsgemäße Batteriezellenan- ordnung 2 weist dabei mehrere Batteriezellen 3 mit zwei einander gegenüberlie- genden Hauptflächen 5a und 5b auf. Die jeweiligen Batteriezellen 3 sind dabei mit den jeweiligen Hauptflächen 5a und 5b einander zugewandt in einer Stapel- richtung 6 zu einem Stapel 7 gestapelt. In diesem Ausführungsbeispiel sind zur Übersichtlichkeit lediglich zwei aneinander gestapelte Batteriezellen 3 gezeigt. Es versteht sich, dass die Batteriezellenanordnung 2 auch mehrere auf gleiche Wei- se aneinander gestapelte Batteriezellen 3 aufweisen kann. Die Stromableiter 8 elektrischer Pole der Batteriezellen 3 erstrecken sich dabei senkrecht zur Stapel- richtung 6. In diesem Ausführungsbeispiel sind die Batteriezellen 3 Pouch-Zellen 4, die jeweils eine senkrecht zur Stapelrichtung erstreckende Siegelnaht 9 auf- weisen. Die Batteriezellenanordnung 2 weist ferner eine Temperierungsanord- nung 10 mit mehreren Fluidkanälen 11 a und 11 b - hier nur jeweils ein Fluidkanal 11 a und ein Fluidkanal 11 b gezeigt - auf, die von einem Fluid durchströmbar sind. Der jeweilige Fluidkanal 11 a und 11 b ist dabei an den benachbarten Batte- riezellen 3 und in diesem Ausführungsbeispiel zwischen den Siegelnähten 9 der benachbarten Batteriezellen 3 angeordnet. Die Temperierungsanordnung 10 ist dabei durch eine flexible Folienschlinge 16 - hier einen flexiblen Folienschlauch 16 - gebildet. 1 and 2 show production steps in a method 1 according to the invention for producing a battery cell arrangement 2 according to the invention, which is shown here partly and in section. The battery cell arrangement 2 according to the invention has a plurality of battery cells 3 with two main surfaces 5a and 5b lying opposite one another. The respective battery cells 3 are stacked with the respective main surfaces 5a and 5b facing each other in a stacking direction 6 to form a stack 7. In this embodiment, only two battery cells 3 stacked together are shown for clarity. It goes without saying that the battery cell arrangement 2 can also have a plurality of battery cells 3 stacked on one another in the same way. The current conductors 8 of the electrical poles of the battery cells 3 extend perpendicular to the stacking direction 6. In this exemplary embodiment, the battery cells 3 are pouch cells 4, each of which has a sealing seam 9 extending perpendicular to the stacking direction. The battery cell arrangement 2 also has a temperature control arrangement 10 with a plurality of fluid channels 11 a and 11 b — only one fluid channel 11 a and one fluid channel 11 b shown here in each case — through which a fluid can flow. The respective fluid channel 11 a and 11 b is on the adjacent battery cells 3 and in this exemplary embodiment between the sealing seams 9 of the adjacent battery cells 3 arranged. The temperature control arrangement 10 is formed by a flexible film loop 16 - here a flexible film tube 16.

Zum Flerstellen der Batteriezellenanordnung 2 wird nach Fig. 1 der flexible Foli- enschlauch 16 mit einem Längsabschnitt 12 zwischen den Batteriezellen 3 ange- ordnet. Dabei werden Wandungsbereiche 13a und 13b des Folienschlauchs 16 an den jeweiligen Flauptflächen 5a und 5b der benachbarten Batteriezellen 3 an- gelegt. In diesem Ausführungsbeispiel weist der Folienschlauch 16 zwischen den beiden Wandungsbereichen 13a und 13b jeweils einen weiteren Wandungsbe- reich 14a und 14b auf. Die Wandungsbereiche 13a und 13b alternieren dabei mit den Wandungsbereichen 14a und 14b in Umlaufrichtung des Folienschlauchs 16 und schließen sich aneinander an. Die Wandungsbereiche 14a und 14b liegen dabei an den Hauptflächen 5a und 5b der Batteriezellen 3 nicht an. Nun wird nach Fig. 2 der Folienschlauch 16 in dem Längsabschnitt 12 in Stapelrichtung 6 zwischen den benachbarten Batteriezellen 3 verpresst. Dabei werden die beiden Wandungsbereiche 13a und 13b aneinander angelegt. Der Folienschlauch 16 steht dabei mit den Wandungsbereichen 14a und 14b senkrecht zur Stapelrich- tung 6 ab, so dass beim Verpressen die Wandungsbereiche 14a und 14b jeweils eine Schlinge 15a und 15b bilden. Die Schlinge 15a und 15b bildet dabei den jeweiligen Fluidkanal 11 a und 11 b der Temperierungsanordnung 10. 1, the flexible film tube 16 is arranged with a longitudinal section 12 between the battery cells 3 in order to provide the battery cell arrangement 2. In this case, wall areas 13a and 13b of the film tube 16 are applied to the respective flat surfaces 5a and 5b of the adjacent battery cells 3. In this exemplary embodiment, the film tube 16 has a further wall area 14a and 14b between the two wall areas 13a and 13b. The wall areas 13a and 13b alternate with the wall areas 14a and 14b in the circumferential direction of the film tube 16 and adjoin one another. The wall regions 14a and 14b are not in contact with the main surfaces 5a and 5b of the battery cells 3. 2, the film tube 16 is pressed in the longitudinal section 12 in the stacking direction 6 between the adjacent battery cells 3. The two wall areas 13a and 13b are placed against each other. The film tube 16 projects with the wall areas 14a and 14b perpendicular to the stacking direction 6, so that the wall areas 14a and 14b each form a loop 15a and 15b during pressing. The loop 15a and 15b forms the respective fluid channel 11a and 11b of the temperature control arrangement 10.

In der Batteriezellenanordnung 2 nach Fig. 2 ist demnach der Längsabschnitt 12 des flexiblen Folienschlauchs 16 zwischen den Batteriezellen 3 angeordnet und liegt an den Hauptflächen 5a und 5b der benachbarten Batteriezellen 3 mit dem jeweiligen Wandungsbereich 13a und 13b an. Dabei ist der Folienschlauch 16 in dem Längsabschnitt 12 in Stapelrichtung 6 zwischen den benachbarten Batterie- zellen 3 derart verpresst, dass die Wandungsbereiche 14a und 14b jeweils die Schlinge 15a und 15b und dadurch jeweils den Fluidkanal 11 a und 11 b bilden. Der jeweilige Fluidkanal 1 1 a und 1 1 b liegt dabei aufgrund der Flexibilität des Fo- lienschlauchs 16 an den Batteriezellen 3 und an den jeweiligen Siegelnähten 9 an, so dass die Wärmeübertragung zwischen dem Fluid in dem jeweiligen Fluid- kanal 1 1 a und 1 1 b und den jeweiligen Batteriezellen 3 verbessert ist. Die beiden Wandungsbereiche 13a und 13b sind in diesem Ausführungsbeispiel in einem Verbindungsbereich 17 fluiddicht aneinander festgelegt, beispielweise thermisch miteinander verschweißt. Der Verbindungsbereich 17 weist dabei zweckgemäß eine kleinere geometrische Fläche als die beiden Flauptflächen 5a und 5b auf, so dass möglicherweise vorliegende Toleranzen in Abmessungen und in Formen der benachbarten Batteriezellen 3 ausgeglichen werden. Alternativ können die beiden Wandungsbereiche 13a und 13b fluiddicht miteinander verpresst bleiben. In the battery cell arrangement 2 according to FIG. 2, the longitudinal section 12 of the flexible film tube 16 is accordingly arranged between the battery cells 3 and bears against the main surfaces 5a and 5b of the adjacent battery cells 3 with the respective wall areas 13a and 13b. The film tube 16 is pressed in the longitudinal section 12 in the stacking direction 6 between the adjacent battery cells 3 in such a way that the wall regions 14a and 14b each form the loop 15a and 15b and thereby each the fluid channel 11a and 11b. The respective fluid channel 1 1 a and 1 1 b rests on the battery cells 3 and on the respective sealing seams 9 due to the flexibility of the foil tube 16, so that the heat transfer between the fluid in the respective fluid channel 1 1 a and 1 1 b and the respective battery cells 3 is improved. In this exemplary embodiment, the two wall areas 13a and 13b are fixed to one another in a fluid-tight manner in a connection area 17, for example thermally welded to one another. The connection area 17 expediently has a smaller geometric area than the two flap areas 5a and 5b, so that any tolerances that may exist in the dimensions and shapes of the adjacent battery cells 3 are compensated for. Alternatively, the two wall areas 13a and 13b can remain pressed together in a fluid-tight manner.

Fig. 3 zeigt eine Schnittansicht der abweichend ausgestalteten Batteriezellenano- rdnung 2. In diesem Ausführungsbeispiel weist die Batteriezellenanordnung 2 abweichend zu der Batteriezellenanordnung in Fig. 2 eine wärmeleitende Wärme- leitplatte 18 auf, die zwischen den Wandungsbereichen 13a und 13b des Folien- schlauchs 16 angeordnet ist. Die Wärmeleitplatte 18 ragt dabei bereichsweise in die Fluidkanäle 1 1 a und 1 1 b hinein, um die Wärmeübertragung zwischen den Flauptflächen 5a und 5b der benachbarten Batteriezellen 3 und dem Fluid in dem jeweiligen Fluidkanal 1 1 a und 1 1 b zu intensivieren. Die Wärmeleitplatte 18 stellt hier einen sogenannten Fleatspreader dar und verbessert die Wärmeübertragung zwischen den Flauptflächen 5a und 5b der benachbarten Batteriezellen 3 und dem Fluid in dem jeweiligen Fluidkanal 1 1 a und 1 1 b. Die Wärmeleitplatte 18 ist in diesem Ausführungsbeispiel ein metallisches Blech mit einer wellenartigen Struk- tur 18a. 3 shows a sectional view of the differently configured battery cell arrangement 2. In this exemplary embodiment, in contrast to the battery cell arrangement in FIG. 2, the battery cell arrangement 2 has a heat-conducting heat-conducting plate 18 which is arranged between the wall regions 13a and 13b of the film tube 16 is. The heat-conducting plate 18 protrudes in some areas into the fluid channels 1 1 a and 1 1 b in order to intensify the heat transfer between the main surfaces 5 a and 5 b of the adjacent battery cells 3 and the fluid in the respective fluid channel 1 1 a and 1 1 b. The heat-conducting plate 18 here represents a so-called fleat spreader and improves the heat transfer between the flap surfaces 5a and 5b of the adjacent battery cells 3 and the fluid in the respective fluid channel 1 1 a and 1 1 b. In this exemplary embodiment, the heat-conducting plate 18 is a metal sheet with a wave-like structure 18a.

Fig. 4 zeigt eine Schnittansicht der weiteren abweichend ausgestalteten Batterie- zellenanordnung 2. Flier weist die Batteriezellenanordnung 2 abweichen zu der Batteriezellenanordnung 2 in Fig. 3 eine elastisch verformbare Kompressionsmat- te 19 auf, die die Wärmeleitplatte 18 bereichsweise umgibt. Die Kompressions- matte 19 kann Toleranzen zwischen den benachbarten Batteriezellen 3 - und insbesondere prozessbedingte Toleranzen zwischen den Pouch-Zellen 4 - aus- gleichen. FIG. 4 shows a sectional view of the further, differently configured battery cell arrangement 2. The battery cell arrangement 2 has a different from the battery cell arrangement 2 in FIG. 3, an elastically deformable compression mat. te 19, which partially surrounds the heat-conducting plate 18. The compression mat 19 can compensate for tolerances between the adjacent battery cells 3 - and in particular process-related tolerances between the pouch cells 4.

Fig. 5 zeigt eine Schnittansicht der weiteren abweichend ausgestalteten Batterie- zellenanordnung 2. Im Unterschied zu der Batteriezellenanordnung in Fig. 4 weist hier die Batteriezellenanordnung 2 eine Verstärkungszone 20 auf, die in dem Wandungsbereich 14a angeordnet ist. Der Wandungsbereich 14a weist dabei in der Verstärkungszone 20 eine höhere Dicke auf. Abweichend dazu ist in dem Wandungsbereich 14b eine Grenzleiste 21 angeordnet, die den Wandungsbe- reich 14b in seiner Ausdehnung begrenzt. Sowohl die Verstärkungszone 20 als auch die Grenzleiste 21 begrenzen die Ausdehnung der Wandungsbereiche 14a und 14b des Folienschlauchs 16 senkrecht zur Stapelrichtung 6 und unterstützen die Ausdehnung der Wandungsbereiche 14a und 14b des Folienschlauchs 16 in Stapelrichtung 6 zu den Siegelnähten 9 der benachbarten Batteriezellen 3 hin. Dadurch legt sich der jeweilige Fluidkanal 11 a und 11 b an einer größeren zu temperierenden Oberfläche der benachbarten Batteriezellen 3 an, wodurch das Temperieren der Batteriezellen 3 verbessert wird. FIG. 5 shows a sectional view of the further, differently designed battery cell arrangement 2. In contrast to the battery cell arrangement in FIG. 4, the battery cell arrangement 2 here has a reinforcement zone 20 which is arranged in the wall region 14a. The wall region 14a has a greater thickness in the reinforcement zone 20. In a departure from this, a border strip 21 is arranged in the wall area 14b, which limits the extent of the wall area 14b. Both the reinforcement zone 20 and the border strip 21 limit the expansion of the wall regions 14a and 14b of the film tube 16 perpendicular to the stacking direction 6 and support the expansion of the wall regions 14a and 14b of the film tube 16 in the stacking direction 6 towards the sealed seams 9 of the adjacent battery cells 3. As a result, the respective fluid channel 11 a and 11 b bears against a larger surface of the adjacent battery cells 3 to be temperature-controlled, as a result of which the temperature control of the battery cells 3 is improved.

Fig. 6 zeigt eine Schnittansicht der weiteren abweichend ausgestalteten Batterie- zellenanordnung 2. Im Unterschied zu der Batteriezellenanordnung in Fig. 4 weist hier die Batteriezellenanordnung 2 ein Verstärkungselement 22 auf, das in dem Wandungsbereich 14a des Folienschlauchs 16 integriert ist und dadurch die Ver- stärkungszone 20 bildet. In dem Fluidkanal 11 b ist abweichend dazu eine Grenz- einlage 23 - hier eine Flalteklammer - angeordnet, die den Wandungsbereich 14b in seiner Ausdehnung begrenzt. Sowohl das Verstärkungselement 22 als auch die Grenzeinlage 23 begrenzen die Ausdehnung der Wandungsbereiche 14a und 14b des Folienschlauchs 16 senkrecht zur Stapelrichtung 6 und unter- stützen die Ausdehnung der Wandungsbereiche 14a und 14b des Folien- schlauchs 16 in Stapelrichtung 6 zu den Siegelnähten 9 der benachbarten Batte- riezellen 3 hin. Dadurch legt sich der jeweilige Fluidkanal 11 a und 11 b an einer größeren zu temperierenden Fläche der benachbarten Batteriezellen 3 an, wodurch das Temperieren der Batteriezellen 3 intensiviert wird. FIG. 6 shows a sectional view of the further, differently configured battery cell arrangement 2. In contrast to the battery cell arrangement in FIG. 4, the battery cell arrangement 2 here has a reinforcement element 22 which is integrated in the wall region 14a of the film tube 16 and thereby the reinforcement zone 20 forms. In contrast to this, in the fluid channel 11b there is a border insert 23 - here a pleated clip - which limits the extent of the wall area 14b. Both the reinforcing element 22 and the limit insert 23 limit the extent of the wall regions 14a and 14b of the film tube 16 perpendicular to the stacking direction 6 and below support the expansion of the wall areas 14a and 14b of the film tube 16 in the stacking direction 6 towards the sealing seams 9 of the adjacent battery cells 3. As a result, the respective fluid channel 11 a and 11 b bears against a larger area of the adjacent battery cells 3 to be temperature-controlled, as a result of which the temperature control of the battery cells 3 is intensified.

Zusammenfassend können die Temperierungsanordnung 10 und dadurch die erfindungsgemäße Batteriezellenanordnung 2 kostengünstig hergestellt sein. Der jeweilige Fluidkanal 11 a und 11 b ist dabei besser an die zu kühlenden Batterie- zellen 3 angebunden, wodurch das Temperieren der Batteriezellen 3 effizienter ist. Durch die Wärmeleitplatte 18 kann die Wärmeübertragung zwischen den Bat- teriezellen 3 und dem Fluid weiter verbessert werden. Ferner sind sowohl der Bauraumbedarf als auch das Gewicht der Temperierungsanordnung 10 und dadurch auch der Batteriezellenanordnung 2 vorteilhaft reduziert. In summary, the temperature control arrangement 10 and thereby the battery cell arrangement 2 according to the invention can be manufactured inexpensively. The respective fluid channels 11 a and 11 b are better connected to the battery cells 3 to be cooled, as a result of which the temperature control of the battery cells 3 is more efficient. The heat transfer between the battery cells 3 and the fluid can be further improved by the heat-conducting plate 18. Furthermore, both the installation space requirement and the weight of the temperature control arrangement 10 and thereby also the battery cell arrangement 2 are advantageously reduced.

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Claims

Ansprüche Expectations 1. Batteriezellenanordnung (2) mit mehreren Batteriezellen (3), insbesondere mit mehreren Pouch-Zellen (4), 1. battery cell arrangement (2) with several battery cells (3), in particular with several pouch cells (4), - wobei die mehreren Batteriezellen (3) jeweils zwei einander gegenüberliegen- de Hauptflächen (5a, 5b) aufweisen und mit den jeweiligen Hauptflächen (5a, 5b) einander zugewandt in einer Stapelrichtung (6) zu einem Stapel (7) gesta- pelt sind,  the plurality of battery cells (3) each have two opposing main surfaces (5a, 5b) and are stacked with the respective main surfaces (5a, 5b) facing each other in a stacking direction (6) to form a stack (7), - wobei Stromableiter (8) elektrischer Pole der mehreren Batteriezellen (3) sich senkrecht zur Stapelrichtung (6) erstrecken,  - Current conductors (8) of electrical poles of the plurality of battery cells (3) extend perpendicular to the stacking direction (6), - wobei die Batteriezellenanordnung (2) eine Temperierungsanordnung (10) mit wenigstens einem von einem Fluid durchströmbaren Fluidkanal (11 a, 11 b) aufweist, der an den benachbarten Batteriezellen (3) angeordnet ist, dadurch gekennzeichnet,  wherein the battery cell arrangement (2) has a temperature control arrangement (10) with at least one fluid channel (11 a, 11 b) through which a fluid can flow and which is arranged on the adjacent battery cells (3), characterized in that - dass die Temperierungsanordnung (10) durch eine flexible Folienschlinge (16) gebildet ist, wobei wenigstens ein Längsabschnitt (12) der flexiblen Folien- schlinge (16) zwischen zwei benachbarten Batteriezellen (3) angeordnet ist und an den Hauptflächen (5a, 5b) der jeweiligen benachbarten Batteriezellen (2) mit jeweils einem Wandungsbereich (13a, 13b) anliegt, und  - That the temperature control arrangement (10) is formed by a flexible film loop (16), at least one longitudinal section (12) of the flexible film loop (16) being arranged between two adjacent battery cells (3) and on the main surfaces (5a, 5b) of the respective adjacent battery cells (2), each with a wall area (13a, 13b), and - dass die flexible Folienschlinge (16) in dem wenigstens einen Längsabschnitt (12) in Stapelrichtung (6) zwischen den benachbarten Batteriezellen (3) derart verpresst ist, dass wenigstens ein weiterer zwischen seinen an den Hauptflä- chen (5a, 5b) anliegenden Wandungsbereichen (13a, 13b) angeordneter Wandungsbereich (14a, 14b) eine geschlossene Schlinge (15a, 15b) bildet und dadurch der wenigstens eine Fluidkanal (11 a, 11 b) der Temperierungsan- ordnung (10) gebildet ist. - That the flexible film loop (16) is pressed in the at least one longitudinal section (12) in the stacking direction (6) between the adjacent battery cells (3) in such a way that at least one further between its wall areas resting on the main surfaces (5a, 5b) (13a, 13b) arranged wall area (14a, 14b) forms a closed loop (15a, 15b) and thereby the at least one fluid channel (11 a, 11 b) of the temperature control arrangement (10) is formed. 2. Batteriezellenanordnung nach Anspruch 1 , 2. battery cell arrangement according to claim 1, dadurch gekennzeichnet, characterized, dass an den benachbarten Batteriezellen (3) beidseitig jeweils ein weiterer zwi- schen den an den Hauptflächen (5a, 5b) anliegenden Wandungsbereichen (13a, 13b) angeordneter Wandungsbereich (14a, 14b) der flexiblen Folienschlinge (16) eine geschlossene Schlinge (15a, 15b) bildet und dadurch beidseitig an den be- nachbarten Batteriezellen (3) jeweils ein Fluidkanal (11 a, 11 b) der Temperie- rungsanordnung (10) gebildet ist. that on the adjacent battery cells (3) on both sides a further loop area (14a, 14b) of the flexible film loop (16) arranged between the wall areas (13a, 13b) adjacent to the main areas (5a, 5b) has a closed loop (15a, 15b) and a fluid channel (11a, 11b) of the temperature control arrangement (10) is formed on both sides of the adjacent battery cells (3). 3. Batteriezellenanordnung nach Anspruch 1 oder 2, 3. battery cell arrangement according to claim 1 or 2, dadurch gekennzeichnet, characterized, dass die an den jeweiligen Hauptflächen (5a, 5b) anliegenden Wandungsberei- che (13a, 13b) der flexiblen Folienschlinge (16) in dem wenigstens einen Längs- abschnitt (12) fluiddicht aneinander festgelegt sind. that the wall areas (13a, 13b) of the flexible film loop (16) abutting the respective main surfaces (5a, 5b) are fixed to one another in a fluid-tight manner in the at least one longitudinal section (12). 4. Batteriezellenanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, 4. Battery cell arrangement according to one of the preceding claims, characterized in that dass die an den jeweiligen Hauptflächen (5a, 5b) anliegenden Wandungsberei- che (13a, 13b) der flexiblen Folienschlinge (16) in dem wenigstens einen Längs- abschnitt (12) in einem Verbindungsbereich (17) aneinander stoffschlüssig fest- gelegt, bevorzugt thermisch miteinander verschweißt, sind. that the wall areas (13a, 13b) of the flexible film loop (16) adjoining the respective main surfaces (5a, 5b) are fixed to one another in the connection area (17) in the at least one longitudinal section (12), preferably thermally welded together. 5. Batteriezellenanordnung nach Anspruch 4, 5. battery cell arrangement according to claim 4, dadurch gekennzeichnet, dass eine geometrische Fläche des Verbindungsbereichs (17) kleiner als eine geometrische Fläche der jeweiligen Flauptflächen (5a, 5b) der benachbarten Bat- teriezellen (3) ist. characterized, that a geometrical area of the connection area (17) is smaller than a geometrical area of the respective flap areas (5a, 5b) of the adjacent battery cells (3). 6. Batteriezellenanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, 6. Battery cell arrangement according to one of the preceding claims, characterized in dass die flexible Folienschlinge (16) aus einem dehnbaren Material geformt ist, so dass der den Fluidkanal (11 a, 11 b) bildende Wandungsbereich (14a, 14b) der flexiblen Folienschlinge (16) in dem wenigstens einen Längsabschnitt (12) sich beim Durchströmen mit einem Fluid ausdehnt und der Fluidkanal (11 a, 11 b) sich an die jeweiligen benachbarten Batteriezellen (3) anlegt. that the flexible film loop (16) is formed from a stretchable material, so that the wall area (14a, 14b) of the flexible film loop (16) forming the fluid channel (11a, 11b) in the at least one longitudinal section (12) flows through it expands with a fluid and the fluid channel (11 a, 11 b) bears against the respective adjacent battery cells (3). 7. Batteriezellenanordnung nach Anspruch 6, 7. battery cell arrangement according to claim 6, dadurch gekennzeichnet, characterized, dass die flexible Folienschlinge (16) zumindest bereichsweise in einer Verstär- kungszone (20) des den Fluidkanal (11 a, 11 b) bildenden Wandungsbereichs (14a, 14b) verstärkt ist, wobei die Verstärkungszone (20) eine Ausdehnung des den Fluidkanal (11 a, 11 b) bildenden Wandungsbereichs (14a, 14b) der flexiblen Folienschlinge (16) senkrecht zur Stapelrichtung (6) von den benachbarten Batte- riezellen (3) hinweg begrenzt und in Stapelrichtung (6) zu den benachbarten Bat- teriezellen (3) hin unterstützt. that the flexible film loop (16) is reinforced at least in some areas in a reinforcement zone (20) of the wall region (14a, 14b) forming the fluid channel (11 a, 11 b), the reinforcement zone (20) extending the fluid channel (11 a, 11 b) forming wall area (14a, 14b) of the flexible film loop (16) perpendicular to the stacking direction (6) bounded by the neighboring battery cells (3) and in the stacking direction (6) to the neighboring battery cells (3) supported. 8. Batteriezellenanordnung nach Anspruch 6 oder 7, 8. battery cell arrangement according to claim 6 or 7, dadurch gekennzeichnet, characterized, dass an dem wenigstens einen Fluidkanal (11 a, 11 b) zwischen den benachbarten Batteriezellen (3) eine Grenzleiste (21 ) festgelegt ist, wobei die Grenzleiste (21 ) eine Ausdehnung des den Fluidkanal (11 a, 11 b) bildenden Wandungsbereichs (14a, 14b) der flexiblen Folienschlinge (16) senkrecht zur Stapelrichtung (6) von den benachbarten Batteriezellen (3) hinweg begrenzt und in Stapelrichtung (6) zu den benachbarten Batteriezellen (3) hin unterstützt. that a border strip (21) is fixed to the at least one fluid channel (11 a, 11 b) between the adjacent battery cells (3), the border strip (21) extending the wall area (14a , 14b) of the flexible film loop (16) perpendicular to the stacking direction (6) of delimits the neighboring battery cells (3) and supports them in the stacking direction (6) towards the neighboring battery cells (3). 9. Batteriezellenanordnung nach einem der Ansprüche 6 bis 8, 9. battery cell arrangement according to one of claims 6 to 8, dadurch gekennzeichnet, characterized, dass in dem wenigstens einen Fluidkanal (11 a, 11 b) eine Grenzeinlage (23) an- geordnet ist, wobei die Grenzeinlage (23) eine Ausdehnung des den Fluidkanal (11a, 11 b) bildenden Wandungsbereichs (14a, 14b) der flexiblen Folienschlinge (16) senkrecht zur Stapelrichtung (6) von den benachbarten Batteriezellen (3) hinweg begrenzt und in Stapelrichtung (6) zu den benachbarten Batteriezellen (3) hin unterstützt. that a boundary insert (23) is arranged in the at least one fluid channel (11 a, 11 b), the boundary insert (23) extending the wall area (14a, 14b) of the flexible film loop forming the fluid channel (11a, 11 b) (16) perpendicular to the stacking direction (6) from the adjacent battery cells (3) and supported in the stacking direction (6) towards the adjacent battery cells (3). 10. Batteriezellenanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, 10. Battery cell arrangement according to one of the preceding claims, characterized in that dass eine wärmeleitende Wärmeleitplatte (18) zwischen den beiden an den Flauptflächen (5a, 5b) der benachbarten Batteriezellen (3) anliegenden Wan- dungsbereichen (13a, 13b) der flexiblen Folienschlinge (16) angeordnet ist und bereichsweise in den wenigstens einen Fluidkanal (11 a, 11 b) hineinragt, um die Wärme von den Flauptflächen (5a, 5b) der benachbarten Batteriezellen (3) zu dem Fluid in dem jeweiligen Fluidkanal (11 a, 11 b) abzuleiten. that a heat-conducting heat-conducting plate (18) is arranged between the two wall areas (13a, 13b) of the flexible film loop (16) lying against the flap surfaces (5a, 5b) of the adjacent battery cells (3) and partially in the at least one fluid channel (11 a, 11 b) protrudes in order to dissipate the heat from the fluff surfaces (5a, 5b) of the adjacent battery cells (3) to the fluid in the respective fluid channel (11 a, 11 b). 11. Batteriezellenanordnung nach Anspruch 10, 11. Battery cell arrangement according to claim 10, dadurch gekennzeichnet, characterized, - dass die Wärmeleitplatte (18) eine Struktur (18a) zum Vergrößern einer Ober- fläche der Wärmeleitplatte (18) aufweist, und/oder  - That the heat-conducting plate (18) has a structure (18a) for enlarging a surface of the heat-conducting plate (18), and / or - dass die Wärmeleitplatte (18) durch eine Kompressionsmatte (19) aus einem elastischen Material zum Ausgleich von Toleranzen zwischen den benachbar- ten Batteriezellen (3) umgeben ist. - That the heat conducting plate (18) is surrounded by a compression mat (19) made of an elastic material to compensate for tolerances between the adjacent battery cells (3). 12. Batteriezellenanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, 12. Battery cell arrangement according to one of the preceding claims, characterized in that dass die flexible Folienschlinge (16) ein endloser Folienschlauch ohne Fügestel- len ist. that the flexible film loop (16) is an endless film tube without joints. 13. Batteriezellenanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, 13. Battery cell arrangement according to one of the preceding claims, characterized in that - dass die flexible Folienschlinge aus einer Verbundfolie geformt ist, die bevor- zugt eine Außenschicht, eine Diffusionssperrschicht und eine Außenschicht aufweist, und/oder  - That the flexible film loop is formed from a composite film, which preferably has an outer layer, a diffusion barrier layer and an outer layer, and / or - dass die flexible Folienschlinge aus einem Elastomer oder aus einem Kunst- stoff mit einer geringen Permeation geformt ist, und/oder  - That the flexible film loop is formed from an elastomer or from a plastic with a low permeation, and / or - dass die flexible Folienschlinge aus einer Kunststofffolie mit brandhemmenden Zusätzen, bevorzugt Triphenylphosphat oder bromiertes Polystyrol, geformt ist, und/oder  - That the flexible film loop is formed from a plastic film with fire-retardant additives, preferably triphenyl phosphate or brominated polystyrene, and / or - dass die flexible Folienschlinge aus einem nicht oder schwer brennenden  - That the flexible film loop from a non or hardly burning Kunststoff, bevorzugt aus Polyvinylchlorid oder Polytetrafluorethylen, geformt ist.  Plastic, preferably made of polyvinyl chloride or polytetrafluoroethylene. 14. Batteriezellenanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, 14. Battery cell arrangement according to one of the preceding claims, characterized in that dass der durch die geschlossene Schlinge (15a, 15b) gebildete Fluidkanal (11 a,that the fluid channel (11 a, 15 a, 15 b) formed by the closed loop (15 a, 15 b) 11 b) der Temperierungsanordnung (10) in einen Sammler und/oder in einen Ver- teiler fluidisch einmündet. 11 b) the temperature control arrangement (10) flows fluidly into a collector and / or into a distributor. 15. Verfahren (1 ) zum Flerstellen der Batteriezellenanordnung (2) nach einem der vorangehenden Ansprüche, 15. The method (1) for making the battery cell arrangement (2) according to one of the preceding claims, - wobei die flexible Folienschlinge (16) mit dem wenigstens einen Längsab- schnitt (12) zwischen den benachbarten Batteriezellen (3) angeordnet und die jeweiligen Wandungsbereiche (13a, 13b) der flexiblen Folienschlinge (16) an den jeweiligen Hauptflächen (5a, 5b) der jeweiligen benachbarten Batteriezel- len (3) angelegt werden; und - The flexible film loop (16) with the at least one longitudinal section (12) is arranged between the adjacent battery cells (3) and the respective wall areas (13a, 13b) of the flexible film loop (16) are applied to the respective main surfaces (5a, 5b) of the respective adjacent battery cells (3); and - wobei die flexible Folienschlinge (16) in dem wenigstens einen Längsabschnitt (12) in Stapelrichtung (6) zwischen den benachbarten Batteriezellen (3) ver- presst wird, so dass der wenigstens eine weitere zwischen den Wandungsbe- reichen (13a, 13b) angeordnete Wandungsbereich (14a, 14b) der flexiblen Fo- lienschlinge (16) eine Schlinge (15a, 15b) bildet und dadurch der wenigstens eine Fluidkanal (11 a, 11 b) der Temperierungsanordnung (10) gebildet wird.  - The flexible film loop (16) is pressed in the at least one longitudinal section (12) in the stacking direction (6) between the adjacent battery cells (3), so that the at least one further one is arranged between the wall areas (13a, 13b) Wall area (14a, 14b) of the flexible foil loop (16) forms a loop (15a, 15b) and thereby the at least one fluid channel (11a, 11b) of the temperature control arrangement (10) is formed. **********
PCT/EP2019/068022 2018-07-05 2019-07-04 Battery cell arrangement and method for producing the battery cell arrangement Ceased WO2020007994A1 (en)

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DE102020118890A1 (en) 2020-07-16 2022-01-20 Audi Aktiengesellschaft Cell module for a traction battery of a motor vehicle and method for producing a cell module
DE102022110062A1 (en) 2022-04-26 2023-10-26 Bayerische Motoren Werke Aktiengesellschaft Solid-state battery and motor vehicle with one
DE102023119733B3 (en) 2023-07-26 2024-06-27 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for forming a battery cell stack from electrically contacted battery cells

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140322572A1 (en) * 2012-03-29 2014-10-30 Lg Chem, Ltd. Battery system and method of assembling the battery system
US9546827B2 (en) 2010-11-30 2017-01-17 Mahle International Gmbh Device for conducting a cooling fluid, and cooling system for cooling an electrical component
US20170040653A1 (en) * 2014-04-14 2017-02-09 Williams Gradn Prix Engineering Limited Heat transfer system
US9666912B2 (en) 2012-12-07 2017-05-30 Obrist Technologies Gmbh Heat-exchanger assembly
US20170194679A1 (en) 2015-12-30 2017-07-06 GM Global Technology Operations LLC Composite Heat Exchanger for Batteries and Method of Making Same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009058958A1 (en) * 2009-12-18 2011-06-22 Magna Steyr Fahrzeugtechnik Ag & Co Kg Cooling / heating element for a rechargeable battery
JP6670448B2 (en) * 2016-08-16 2020-03-25 株式会社オートネットワーク技術研究所 Power storage module

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9546827B2 (en) 2010-11-30 2017-01-17 Mahle International Gmbh Device for conducting a cooling fluid, and cooling system for cooling an electrical component
US20140322572A1 (en) * 2012-03-29 2014-10-30 Lg Chem, Ltd. Battery system and method of assembling the battery system
US9666912B2 (en) 2012-12-07 2017-05-30 Obrist Technologies Gmbh Heat-exchanger assembly
US20170040653A1 (en) * 2014-04-14 2017-02-09 Williams Gradn Prix Engineering Limited Heat transfer system
US20170194679A1 (en) 2015-12-30 2017-07-06 GM Global Technology Operations LLC Composite Heat Exchanger for Batteries and Method of Making Same

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