Cell connector for pouch cell assemblies, pouch cell assembly, and battery pack

Abstract

The invention relates to a cell connector (1, 1a, 1b) for pouch cell assemblies (42) of a battery pack (58), wherein the cell connector is designed to connect two pouch cells (4, 4a, 4b) lying one above the other in a stacking direction (2) to, in each case, a first and a second electrode (6, 6a, 6b), through which an opening (8) penetrates in the stacking direction. The cell connector also has: an electrically conductive contact element (12), which is designed to electrically connect the first electrodes in the stacking direction, the contact element having two electrode support surfaces (16), which are parallel to one another in the stacking direction, and the contact element being penetrated by a through-opening (18), which extends between the electrode support surfaces in the stacking direction; and a clamping device (14), at least some portions of which are situated in the through-opening and which is designed to press each of the first electrodes against at least one of the electrode support surfaces. Such a cell connector increases the stability and service life of pouch batteries and at the same time reduces maintenance effort and costs.

Description

[0001] Cell connectors for pouch cell assemblies, pouch cell assemblies and battery packs

[0002] The present invention relates to a cell connector for pouch cell arrangements of a battery pack, a pouch cell arrangement for a battery pack, and a battery pack with pouch cell arrangements.

[0003] Pouch batteries are widely used. They consist of multiple stacked and interconnected pouch cells, typically housed in a common casing. Advantages of pouch batteries include their high energy density and lifespan, as well as their high packing density and variety of shapes. However, pouch cells are not very dimensionally stable and can, for example, swell, which can damage individual pouch cells and thus the entire pouch battery.

[0004] The present invention is therefore based on the objective of making pouch batteries easier to maintain.

[0005] This problem is solved by a cell connector for pouch cell arrangements of a battery pack, wherein the cell connector is configured to connect two pouch cells stacked one above the other in a stacking direction, each having a first and a second electrode through which an opening is penetrated in the stacking direction, and further comprising: an electrically conductive contact body configured to electrically connect the first electrodes in the stacking direction, wherein the contact body has two electrode support surfaces arranged parallel to each other in the stacking direction, and wherein the contact body is penetrated by a through-opening which extends in the stacking direction between the electrode support surfaces; and a clamping device arranged at least partially in the through-opening which is configured to press each of the first electrodes against at least one of the electrode support surfaces.

[0006] The clamping device, which presses the first electrodes against the electrode contact surfaces, enables the cell connector to establish a reliable and stable electrical connection between two pouch cells. Connecting the electrodes using the cell connector is quick and easy, thanks to its simple design and ease of assembly. Furthermore, the cell connector allows for the straightforward replacement of individual pouch cells within a pouch cell array, as the clamping device is easy to release and reattach. This allows for the isolated removal of individual pouch cells from the array: once the cell to be replaced has been released and removed, the replacement pouch cell can be quickly and easily connected to the remaining pouch cell by reattaching the clamping device.This reduces maintenance, material waste and therefore costs.

[0007] The above invention can be further improved by the following features, each of which is advantageous in itself and can be combined with each other as desired.

[0008] In a stable, easy-to-manufacture, and therefore cost-effective design, the contact body can essentially be cuboid. Of course, in other designs, the contact body can also take on other shapes, such as plate-shaped or cube-shaped. Individual or multiple edges of the contact body can also be rounded.

[0009] A cell connector is particularly stable and cost-effective to manufacture if its contact body is monolithically formed, for example, cast, especially injection-molded. For ease of manufacturing, the contact body of the cell connector is preferably made entirely of an electrically conductive material, such as metal. Of course, the contact body can also be electrically conductive only in certain sections, for example, by having an electrically conductive surface coating.

[0010] The through-opening of the contact body is preferably round, particularly circular, to facilitate simple manufacturing. Of course, the through-opening can also be shaped differently and, for example, have an oval, polygonal, or particularly rectangular cross-section. It is also conceivable that the cross-section of the through-opening changes, at least partially, in the stacking direction, for example, by tapering. Thus, in one embodiment, the through-opening can be conical. The through-opening can also be broken open or open to the outside and, for example, be designed as a slot.

[0011] The electrode contact surfaces can each be arranged on a side face of the contact body that points in the stacking direction. To maximize the area and optimize the electrical contact, the electrode contact surfaces preferably extend over an entire side face of the contact body that points in the stacking direction. In one embodiment, the electrode contact surfaces are each larger than the areas of the first electrodes. To further improve the electrical contact, the electrode contact surfaces can have a profiled surface structure. This can reduce the contact resistance.

[0012] The clamping device can, for example, have at least one screw connection, rivet connection and / or pin connection. Of course, other designs of the clamping device are also conceivable.

[0013] To simplify the integration of the cell connector into a circuit, according to an advantageous embodiment, the cell connector can have at least one electrically conductive contact pin projecting from the contact body. The electrodes connected by the contact body can be electrically connected together via this contact pin, or integrated into a circuit.

[0014] The at least one contact bolt is preferably electrically conductive, at least in sections.

[0015] The at least one contact pin is preferably monolithically formed with the contact body in a stable and easy-to-manufacture design. Of course, the at least one contact pin can also be separate from the contact body and thus, for example, be insertable, screwable, or pressed into the contact body. The contact body can be provided with a bore for this purpose, which may have a thread.

[0016] The contact bolt has a preferably round cross-section, particularly circular. Of course, other cross-sections are also conceivable, for example a polygonal, particularly a rectangular, cross-section.

[0017] The at least one contact bolt preferably extends parallel to the electrode contact surfaces and perpendicular to the stacking direction. If more than one contact bolt is provided, the contact bolts preferably all extend in the same direction, in particular all parallel to the electrode contact surfaces and perpendicular to the stacking direction.

[0018] The at least one contact bolt can extend orthogonally to a longitudinal axis of the through-opening of the contact body. To make the at least one contact bolt more stable and to prevent it from breaking off, the at least one contact bolt can have a base at its end facing the contact body, the cross-section of which is larger than the cross-section of the rest of the contact bolt. The cross-section of the base, like the cross-section of the rest of the base, can have various shapes, for example, a polygonal, and in particular a rectangular, cross-section. Furthermore, it is conceivable that the cross-section of the base has a different shape than the cross-section of the rest of the contact bolt. In a very simple embodiment, the base has the same cross-section as the contact body itself.

[0019] According to an advantageous embodiment, the at least one contact pin can have at least one section with a flat side surface that is flush with a side surface of the contact body facing in the stacking direction. The flat side surface can be aligned with one of the side surfaces of the contact body facing in the stacking direction. The flat end surface ensures that the contact body does not project beyond the rest of the contact body in the stacking direction, and in particular not beyond the electrode contact surfaces. In this way, the contact body can be positioned between the first electrodes of a pouch cell in such a way that good contact between the electrode contact surfaces and the electrodes can be established.

[0020] The at least one section with the flat side surface can, in one embodiment, extend only in the area of ​​the base or beyond the base. Furthermore, the at least one flat side surface can be part of at least one of the electrode contact surfaces in order to improve the contact between the contact body and at least one of the electrodes.

[0021] To make the contact pin interchangeable and thus adaptable to different applications requiring differently designed contact pins, at least one contact pin can be formed by a screw screwed into the contact body. The screw can, in particular, be screwed into the base of the contact body.

[0022] The contact body can have a bore, designed to complement the screw and provided with an internal thread, in which the screw can be received, at least partially. The screw can be fastened in the bore or can be fastened in it. The screw and the bore can form a screw connection. Of course, the contact bolt can also be formed by a connecting element other than a screw, such as a spring, a rivet, or a pin.

[0023] In one embodiment, the contact bolt together with the contact body can form a clamping device.

[0024] The problem is further solved by a pouch cell arrangement for a battery pack, comprising a first pouch cell and a second pouch cell located above the first pouch cell in a stacking direction, wherein the pouch cells each have a first electrode and a second electrode, each of which is penetrated by an opening in the stacking direction, wherein the first electrode of the first pouch cell is located above the first electrode of the second pouch cell in the stacking direction and the second electrode of the first pouch cell is located above the second electrode of the second pouch cell in the stacking direction, and comprising a first cell connector, wherein the first cell connector comprises: an electrically conductive contact body penetrated by a through-opening in the stacking direction, which is arranged at least sectionally between the first electrode of the first pouch cell and the first electrode of the second pouch cell and electrically connects the first electrodes.and a clamping device by which the first electrode of the first pouch cell and the first electrode of the second pouch cell are pressed against the contact body of the first cell connector.

[0025] Such a pouch cell assembly is capable of establishing a robust and stable electrical connection between the first electrodes of the first and second pouch cells. Simultaneously, the assembly and disassembly of the pouch cells, and in particular the replacement of individual pouch cells within the assembly, is quick and easy. This reduces assembly and maintenance effort.

[0026] According to a further advantageous embodiment, the pouch cell arrangement can have a second cell connector, wherein the second cell connector comprises: an electrically conductive contact body with a through-hole in the stacking direction, which is arranged at least sectionally between the second electrode of the first pouch cell and the second electrode of the second pouch cell and electrically connects the second electrodes, and a clamping device by which the second electrode of the first pouch cell and the second electrode of the second pouch cell are pressed against the contact body of the second cell connector.

[0027] By connecting the second electrodes of the first and second pouch cell arrangements via a cell connector, the quality and durability of the electrical connection between the two pouch cells is further improved, and the assembly and disassembly effort is further reduced.

[0028] The through-hole of the contact body of the first cell connector can align with the openings of the first electrodes and / or the through-hole of the contact body of the second cell connector can align with the openings of the second electrodes.

[0029] In one embodiment, the first electrode of the first pouch cell and the first electrode of the second pouch cell have the same polarity, and the second electrode of the first pouch cell and the second electrode of the second pouch cell have the same polarity, which differs from the polarity of the first electrode of the first pouch cell and the first electrode of the second pouch cell. For example, the first electrodes can both be negatively polarized and the second electrodes can both be positively polarized.

[0030] To ensure good accessibility of the contact studs from a common side of the pouch cells, the at least one contact stud of the first cell connector and the at least one contact stud of the second cell connector can point in the same direction. Preferably, each contact stud points towards the first and / or second electrodes.

[0031] A particularly uniform and reliable pressing of the electrodes against the contact body of the respective cell connector can be achieved in an embodiment if the clamping device of the first cell connector has at least two opposing pressure surfaces in the stacking direction, and / or if the clamping device of the second cell connector has at least two opposing pressure surfaces in the stacking direction, and if each pressure surface of the clamping device of the first cell connector is pressed against one of the sides of the first electrodes facing away from the contact body of the first cell connector, and / or if each pressure surface of the clamping device of the second cell connector is pressed against one of the sides of the second electrodes facing away from the contact body of the second cell connector.

[0032] The pressure surfaces may have at least one section which does not overlap the through-opening of the contact body which is part of the cell connector having these pressure surfaces in the stacking direction.

[0033] According to a further advantageous embodiment, the clamping device of the first and / or second cell connector can have at least one connecting section linking the contact surfaces, through which the contact surfaces are pressed together, wherein the connecting section of the clamping device of the first cell connector at least partially penetrates the through-opening of the contact body of the first cell connector, and / or wherein the connecting section of the clamping device of the second cell connector at least partially penetrates the through-opening of the contact body of the second cell connector. Such a connecting section enables the contact surfaces to be connected and pressed together in a structurally simple manner. The at least partial arrangement of the connecting section in the through-opening of the contact body also saves space.

[0034] In a particularly space-saving embodiment, the connecting section of the clamping device of the first cell connector can completely penetrate the through-opening of the contact body of the first cell connector, and / or the connecting section of the clamping device of the second cell connector can completely penetrate the through-opening of the contact body of the second cell connector. Preferably, each connecting section is completely enclosed within the through-opening of the respective contact body.

[0035] The connecting section of the clamping device of the first and / or the second cell connector can have a pin section and a receiving section that can be connected to the pin section. The pin section and receiving section can be designed to be connected to each other, for example, by screwing, plugging, crimping, or clamping. Preferably, the pin section and receiving section are connected in such a way that they can be separated or detached again.

[0036] The pin section and / or the receiving section can have at least one screw connection, rivet connection, spring connection, and / or bolt connection. If a screw connection is provided, it can have at least one washer. The at least one washer can, for example, be arranged between a screw head and one of the electrodes. The screw connection can alternatively or cumulatively comprise a screw and a nut complementary to the screw, in particular a sleeve nut. The sleeve nut can be arranged, at least partially, in the through-opening of the respective contact body.

[0037] The pin section and the receiving section of the clamping device of the first cell connector can each have a thread, wherein the threads are complementary to each other, and / or the pin section and the receiving section of the clamping device of the second cell connector can each have a thread, wherein the threads are complementary to each other. Preferably, the at least one pin section has an external thread and the at least one receiving section has an internal thread. The sections having the threads can be arranged in the through-opening of the respective clamping body.

[0038] The pin section of the clamping device of the first cell connector can penetrate the opening of the first electrode of the first pouch cell and the receiving section of the clamping device of the first cell connector can penetrate the opening of the first electrode of the second pouch cell, and / or the pin section of the clamping device of the second cell connector can penetrate the opening of the second electrode of the first pouch cell and the receiving section of the clamping device of the second cell connector can penetrate the opening of the second electrode of the second pouch cell.

[0039] To protect the pouch cell arrangement, in particular the electrodes and / or the at least one cell connector, the pouch cell arrangement can have at least one cover that surrounds the first and / or the second electrodes and the first and / or the second cell connector at least partially, but preferably completely.

[0040] The cover can have at least one recess in which the at least one contact bolt is at least partially received or through which the at least one contact bolt protrudes.

[0041] Preferably, the cover is essentially cuboid in shape.

[0042] To insulate the electrodes surrounded by the at least one cover and / or the at least one cell connector enclosed by the cover, the at least one cover can be made at least partially, but preferably entirely, of an electrically insulating or non-conductive material, such as plastic. In an automated and therefore cost-effective embodiment, the cover can be injection-molded.

[0043] To connect adjacent pouch cell arrangements, for example in a battery pack, at least one cover can have a positive locking arrangement comprising positive locking elements. In some embodiments, the positive locking elements each have an undercut in the stacking direction, by which the respective positive locking element is secured against movement in the stacking direction by a complementary positive locking element. The width of the positive locking elements, which have an undercut, can vary along the stacking direction.

[0044] In one embodiment, at least one of the positive locking elements can be molded into the cover in order to achieve a stable positive locking arrangement.

[0045] Preferably, the positive locking elements of the positive locking arrangement are arranged on the sides pointing in the stacking direction, in particular on longitudinal sides of the cover.

[0046] According to a further advantageous embodiment, the positive locking arrangement can comprise at least one pair of mutually complementary positive locking elements. Two covers provided with such a positive locking arrangement can be easily joined by each positive locking element of one cover engaging with a complementary positive locking element of the other cover.

[0047] According to a further embodiment, at least one of the positive locking elements of the positive locking arrangement can be designed as a separate positive locking body, which is designed to be complementary to at least one other positive locking element of the positive locking arrangement and can be positively connected to it. In this way, the covers of two pouch cell assemblies can be connected to each other particularly easily. In particular, the pouch cell assemblies to be connected can first be arranged and aligned in the stacking direction and then connected with the separate positive locking bodies. Furthermore, a separate positive locking body can be replaced, which reduces maintenance effort and costs. A separate positive locking body can be understood to be a positive locking body that is not connected to, or separate from, or separable from the cover to which it belongs.A separate interlocking element, in particular, cannot be monolithically formed with the cover. To improve handling during assembly, the separate interlocking element may be provided with an opening or recess.

[0048] In general, there are virtually no limits to the design of a positive locking arrangement. For example, the positive locking arrangement of a cover can incorporate at least parts or elements of a dovetail joint, a tongue-and-groove joint, a keyway joint, a bolted joint, a splined joint, and / or a pin joint. Furthermore, it is conceivable that one positive locking element is designed as a hook and another as a complementary eyelet.

[0049] At least one positive locking element of the positive locking arrangement of a cover can be configured as a recess, in particular a recess formed in the cover. In one embodiment, at least one positive locking element is configured as a separate positive locking body that is complementary to the at least one recess. The positive locking body can be configured such that it can simultaneously engage in a recess of two different covers in order to connect them together.

[0050] At least one positive locking element of the positive locking arrangement of a cover can be designed as a projection, in particular as a projection molded into the cover. This projection can be complementary to the at least one recess, provided the cover also has at least one positive locking element designed as a recess. Such covers can be assembled or connected like a puzzle.

[0051] A cross-section of the recess or projection can essentially be T-shaped.

[0052] According to a further advantageous embodiment, the first cell connector can have at least one electrically conductive contact pin projecting from the contact body of the first cell connector and / or the second cell connector can have at least one electrically conductive contact pin projecting from the contact body of the second cell connector, and the pouch cell arrangement can have at least one printed circuit board, wherein each contact pin projects through an opening of the printed circuit board at least partially, and wherein the at least one printed circuit board is electrically connected to the contact body and / or the contact pin of the first and / or second cell connector.

[0053] In order to monitor the pouch cells during operation, the pouch cell arrangement can, according to a further embodiment, have at least one sensor device configured to measure the temperature and / or electrical voltage of the first and / or second pouch cell.

[0054] To make the pouch cell arrangement space-saving and easy to assemble, at least one sensor device can be part of at least one circuit board.

[0055] At least one sensor device can measure the temperature and / or the electrical voltage of the cell at an interface between a busbar and a circuit board of the pouch cell assembly. The circuit board can, in particular, be the circuit board of which the sensor device is a part.

[0056] If the sensor device is indirectly connected to the circuit board and is located near the pouch cell or near the cell connector, information about the temperature of the pouch cell can be obtained.

[0057] Electrical and especially electronic devices are typically implemented using printed circuit boards (PCBs). A PCB, also known as a circuit board, is a substrate for electronic and electrical components, serving to mechanically mount and electrically connect them. Virtually every electronic device contains one or more PCBs.

[0058] Printed circuit boards (PCBs) consist of an electrically insulating material with conductive traces attached to it. Fiber-reinforced plastic is commonly used as the insulating material; in less expensive devices, hard paper is also used. The traces are usually etched from a thin layer of copper, typically about 35 µm thick. The components are soldered onto pads or into solder holes. This provides both mechanical support and an electrical connection. Larger components can also be attached to the PCB using cable ties, adhesive, or screws.

[0059] The copper layer on the circuit board can also be designed to transmit high currents. In this way, a circuit board can also be used as a busbar. The problem is further solved by a battery pack, particularly for powering electric light vehicles, with a plurality of pouch cell assemblies stacked one above the other and with a plurality of busbars, each busbar electrically connecting the first or second cell connector of one pouch cell assemblies to the first or second cell connector of another pouch cell assembly. By connecting all pouch cells electrically via separate busbars rather than a common busbar, individual pouch cells can be easily removed simply by disconnecting individual busbars. The assembly or...This reduces the disassembly effort required to replace individual pouch cells, making the battery pack easier to maintain.

[0060] The problem is further solved by a battery pack, particularly for powering electric light vehicles, comprising a plurality of pouch cell assemblies stacked one above the other, with the covers of adjacent pouch cell assemblies being positively connected to one another in the stacking direction. In this way, the stacked pouch cell assemblies are combined to form a compact and stable unit. Since the positive connection of the covers is releasable, individual pouch cell assemblies can be easily removed from or inserted into the battery pack. This particularly simplifies maintenance.

[0061] The adjacent covers can be connected in the stacking direction, particularly under compression and / or tension, to prevent relative movement of the covers in the stacking direction. One degree of freedom of the positive-locking connections of adjacent covers can point in the direction of the electrodes and / or contact studs.

[0062] A particularly simple positive locking connection between two covers, which does not require additional connecting parts, can be achieved if at least one positive locking element of the positive locking arrangement of one cover engages in a positive locking element of the positive locking arrangement of a cover adjacent in the stacking direction, which is designed in a complementary manner to this positive locking element.

[0063] In a cost-effective design suitable for mass production, the covers of all pouch cell arrangements of the battery pack are identical.

[0064] Preferably, the interlocking elements of the interlocking arrangement of the covers are oriented opposite each other with respect to the stacking directions. All covers can, for example, have at least two recesses, preferably each arranged on one of the sides of the covers facing the stacking direction. The interlocking arrangements can each have at least one interlocking element complementary to at least one of the recesses. Each interlocking element can engage in a form-fitting manner with two recesses adjacent in the stacking direction of two covers adjacent in the stacking direction in order to connect them to one another.

[0065] In a further embodiment, the covers can each have at least one positive-locking element configured as a recess and an equal number of positive-locking elements configured as projections, which are complementary to the at least one recess. For example, a cover can have a single recess and a single complementary projection. Pouch cell assemblies having such a cover can thus be connected by the projection(s) of one cover engaging in the recess(s) of the other cover, and vice versa.

[0066] Preferably, complementary form-locking elements of a cover are located on different sides of the cover facing the stacking direction. For example, a projection of the cover can be arranged on one side facing the stacking direction, and a recess on the other side facing the stacking direction.

[0067] To facilitate the electrical connection of the pouch cell assemblies, the contact studs of the pouch cell assemblies in a battery pack can extend parallel to each other. Preferably, the contact studs extend parallel to the first and / or second electrodes of the pouch cell assemblies.

[0068] To electrically connect the pouch cell assemblies of a battery pack, the battery pack can have busbars that connect the contact pins of the cell connectors of different pouch cell assemblies. The busbars can connect contact pins with the same or different polarities to achieve a parallel or series connection of the pouch cell assemblies.

[0069] The invention is explained in more detail below with reference to exemplary embodiments and the accompanying figures. Individual features present in the following exemplary embodiment may be omitted if, according to the embodiments described above, the technical effect associated with that feature is not important. Conversely, a feature described above but not present in a subsequent exemplary embodiment may be added to the exemplary embodiment if the technical effect associated with that feature is important for a particular application.

[0070] In the following, the same reference symbols are used for elements that correspond to each other in terms of structure and / or function.

[0071] They show:

[0072] Fig. 1 shows a schematic perspective view of cell connectors with pouch cells according to one possible embodiment;

[0073] Fig. 2 is a schematic perspective view of a single pouch cell from Fig. 1;

[0074] Fig. 3 shows a schematic perspective view of the electrodes of a pouch cell according to another possible embodiment;

[0075] Fig. 4 is a schematic perspective view of a single cell connector from Fig. 1;

[0076] Fig. 5 is a schematic sectional view of one of the cell connectors from Fig. 1;

[0077] Fig. 6 shows a schematic perspective view of a pouch cell arrangement according to one possible embodiment;

[0078] Fig. 7 shows a schematic sectional view of the pouch cell arrangement according to Fig. 6;

[0079] Fig. 8 shows a schematic perspective view of a plurality of stacked pouch cell arrangements according to another possible embodiment;

[0080] Fig. 9 is a schematic perspective view of the covers from Fig. 8;

[0081] Fig. 10 shows a schematic perspective view of a positive locking body according to one possible embodiment;

[0082] Fig. 11 shows a schematic perspective view of a battery pack according to one possible embodiment;

[0083] Fig. 12 is a schematic perspective view of a battery pack according to another possible embodiment; Fig. 13 is a schematic perspective view of a pouch cell arrangement according to another possible embodiment;

[0084] Fig. 14 shows a schematic perspective view of a pouch cell arrangement according to yet another possible embodiment; and

[0085] Fig. 15 shows a schematic perspective view of a pouch cell arrangement according to yet another possible embodiment.

[0086] The following is a purely exemplary illustration of the function of a cell connector with reference to Figures 1 to 3.

[0087] Fig. 1 shows two cell connectors 1, each designed to connect pouch cells 4 stacked one above the other, or synonymously, side by side, in a stacking direction 2. The pouch cells 4 to be connected by the cell connector 1 each have a first electrode 6, 6a and a second electrode 6, 6b, which in the illustrated embodiment are tab- or plate-shaped and extend in the plane spanned by the respective pouch cell 4. The connection that the cell connectors 1 can establish between two pouch cells 4 stacked one above the other in the stacking direction 2 can be understood as either an electrical or a mechanical connection.

[0088] As can be seen in the example of a single pouch cell 4 in Fig. 2, the first and second electrodes 6, 6a, 6b each have an opening 8 that extends through the first 6, 6a and second electrodes 6, 6b, respectively, in the stacking direction 2. However, the openings 8 do not have to be circular, as shown in the embodiment in Fig. 2. For example, the openings 8 can be slit-shaped, as can be seen in Fig. 3. There, the slit-shaped openings 8 extend, in particular, to an outer edge 10 of the electrodes 6, 6a, 6b, so that the openings 8 are accessible not only in the stacking direction 2, but also from a direction other than the stacking direction 2. Of course, differently shaped openings 8 are also possible. Moreover, the openings 8 of the first and second electrodes 6, 6a, 6b can each be shaped differently.For example, the opening 8 of the first electrode 6, 6a can be circular, while the opening 8 of the second electrode 6, 6b has a polygonal opening 8.

[0089] The construction of a cell connector 1 is described below by way of example only, with reference to Figures 4 and 5. Figure 4 shows a cell connector 1 comprising a contact body 12 and a clamping device 14. The contact body 12 is shown here as a purely exemplary monolithic and essentially cuboid in shape. Of course, in other embodiments, the contact body 12 can also have other shapes, such as being cube-shaped or plate-shaped. Likewise, the contact body 12 can be formed or composed of several elements, which can be made of the same or different materials.

[0090] The contact body 12 is at least partially, but preferably completely, electrically conductive and is designed to electrically connect the first electrodes 6, 6a of stacked pouch cells 4 in the direction 2 of the stack, as can be seen in the sectional view in Fig. 5. The contact body 12 has two electrode contact surfaces 16 arranged parallel with respect to the stack direction 2, which in the illustrated embodiment are arranged on sides of the contact body 12 facing in the stack direction 2.

[0091] The contact body 12 is penetrated by a through-opening 18, which extends in the stacking direction 2 between the two electrode support surfaces 16, i.e., from one electrode support surface 16 to the other electrode support surface 16. The cross-section of the through-opening 18, extending perpendicular to the stacking direction 2, is preferably round, in particular circular, although other shapes such as a polygonal shape are of course also possible.

[0092] The cell connector 1 can also have at least one electrically conductive contact pin 20, which projects from the contact body 12. In the embodiment shown in Figs. 4 and 5, the contact pin 20 extends perpendicular to the stacking direction 2 and along the electrodes 6, 6a, 6b, for which the cell connector 1 is designed to connect.

[0093] In the embodiment shown in Figures 4 and 5, the contact bolt 20 is not arranged centrally between the sides or electrode support surfaces 16 of the contact body 12 facing in the stacking direction 2, but rather eccentrically. In this configuration, the contact bolt 20 is therefore located closer to one side of the contact body 12 facing in the stacking direction 2, or closer to one electrode support surface 16, than to the other side of the contact body 12 facing in the stacking direction 2, or closer to the other electrode support surface 16. The contact bolt 20 may also have a base 22 at its end facing the contact body 12. The base 22 has a cross-section 26 perpendicular to a longitudinal axis 24 of the contact bolt 20, which is larger than the cross-section of the remaining contact bolt 20 that is perpendicular to the longitudinal axis 24 of the contact bolt 20.

[0094] In the illustrated embodiment, the contact pin 20 has a chamfer 28 at its free end facing away from the contact body 12, which can, for example, simplify the insertion of a receptacle designed complementarily to the contact pin 20, such as an electrical socket or a busbar.

[0095] The contact bolt 20 can also have a thread on its cylindrical surface. The contact bolt can then be fitted with a suitable contact bolt nut, which is not shown in the figures.

[0096] The contact bolt 20 can have at least one section 30 with a flat side surface 32 that is flush with or aligned with a side surface 32 of the contact body 12 pointing in the stacking direction 2. In the embodiment according to Fig. 4, a single such section 30 with a flat side surface 32 is provided, which extends exclusively in the area of ​​the base 22 of the contact bolt 20. Of course, it is also conceivable that the section 30 extends at least partially in the area of ​​the remaining contact bolt 20, and in particular not at all in the area of ​​the base 22. Likewise, more than one section 22 with a flat side surface 30 can be provided. For example, two such sections 22 with a flat side surface 32 can be provided, which can be opposite each other, in particular with respect to the stacking direction 2.

[0097] As can be clearly seen in Fig. 5, the clamping device 14 is arranged at least partially in the through-opening 18 of the contact body 12. In the embodiment shown in Figs. 4 and 5, the clamping device 14 has, purely by way of example, a screw connection. Of course, the clamping device 14 can also have other types of connection, for example, a rivet, spring, or bolt connection. Combinations of different connection types are also conceivable.

[0098] In the present embodiment, the screw connection comprises a screw 34, a sleeve nut 36, and a washer 38. The screw 34 and the sleeve nut 36 each have a threaded section 40, the sections 40 being arranged, purely by way of example, entirely within the through-opening 18 of the contact body 12. The following describes, purely by way of example, the construction of a pouch cell arrangement 42 with reference to Figures 6 and 7.

[0099] The pouch cell arrangement 42 comprises a first pouch cell 4, 4a and a second pouch cell 4, 4b, which are stacked one above the other, or synonymously, side by side, in the stacking direction 2. Each pouch cell 4, 4a, 4b has a first electrode 6, 6a and a second electrode 6, 6b, each of which is penetrated in the stacking direction 2 by an opening 8, which in the illustrated embodiment is purely exemplary and circular. The pouch cells 4, 4a, 4b are arranged such that the first electrode 6, 6a of the first pouch cell 4, 4a is located in stacking direction 2 above the first electrode 6, 6a of the second pouch cell 4, 4b, and that the second electrode 6, 6b of the first pouch cell 4, 4a is located in stacking direction 2 above the second electrode 6, 6b of the second pouch cell 4, 4b.

[0100] In the illustrated embodiment, the openings 8 of the first electrodes 6, 6a and the openings 8 of the second electrodes 6, 6b are aligned in the stacking direction 2. Of course, in other embodiments it is also conceivable that the openings 8 of the first electrodes 6, 6a and the second electrodes 6, 6b overlap with respect to the stacking direction 2, but do not align.

[0101] The pouch cell arrangement 42 can have a first cell connector 1, 1a and a second cell connector 1, 1b. The first cell connector 1, 1a connects the first electrode 6, 6a of the first pouch cell 4, 4a to the first electrode 6, 6a of the second pouch cell 4, 4b, while the second cell connector 1, 1b connects the second electrode 6, 6b of the first pouch cell 4, 4a to the second electrode 6, 6b of the second cell connector 4, 4b. Of course, in other embodiments, the pouch cell arrangement 42 can also have only a single cell connector 1, in particular only the first cell connector 1, 1b. In a further exemplary embodiment not shown, the cell connector can also connect four or more than four electrodes, especially if the cell connector is made of conductive and non-conductive materials.

[0102] Both the first and second cell connectors 1, 1a, 1b each have a contact body 12 and a clamping device 14. In the illustrated embodiment, the first and second cell connectors 1, 1a, 1b are largely identical and differ only in the positioning of the contact pins 20. Of course, in other embodiments, the first and second cell connectors 1, 1a, 1b can also be completely identical or differ significantly in their design and, for example, have different contact bodies 12 and / or different clamping devices 14. In particular, the contact bodies 12 do not have to be cuboid-shaped and each have identical contact pins 20 extending parallel to each other, as in the illustrated embodiment.It is also possible that not both clamping devices 14 have a screw connection and that at least one of the two clamping devices 14 has, for example, a rivet connection or spring connection.

[0103] The contact body 12 of the first cell connector 1, 1a is arranged section by section between the first electrodes 6, 6a, and the contact body 12 of the second cell connector 1, 1b is arranged section by section between the second electrodes 6, 6b. Since the contact bodies 12 are at least sectionally electrically conductive, the first electrodes 6, 6a are electrically connected via the contact body of the first cell connector 1, 1a, and the second electrodes 6, 6b are electrically connected via the contact body of the second cell connector 1, 1b. In the illustrated embodiment, the first and second electrodes 6, 6a respectively bear against the electrode contact surfaces 16, which can be arranged on sides of the contact bodies 12 facing in the stacking direction 2.

[0104] To press the first electrodes 6, 6a against the contact body 12 of the first cell connector 1, 1a and the second electrodes 6, 6b against the contact body 12 of the second cell connector 1, 1b, the first and second cell connectors 1, 1a, 1b each have a clamping device 14. In the embodiment shown in Figures 6 and 7, the clamping devices 14 are identical and both are designed as screw connections, purely by way of example. It should be noted that the design of the clamping devices 14 is by no means limited to the configurations shown in Figures 6 and 7. For example, the clamping device 14 of the first and / or second cell connector 1, 1a, 1b can have at least one rivet, spring, or pin connection. Clamping devices 14 that can be detached and reattached are particularly advantageous.In this way, a cell connector 1 , 1a, 1b can be detached in order, for example, to remove, replace, and then reattach at least one pouch cell 4, 4a, 4b previously connected to this cell connector 1 , 1a, 1b to the respective contact body 12.

[0105] The screw connections shown in Figures 6 and 7, which form the clamping devices 14 of the first and second cell connectors 1, 1a, 1b respectively, each include, purely by way of example, a screw 34 and a complementary sleeve nut 36 as well as a washer 38. In this embodiment, the screw 34 of the clamping device 14 of the first cell connector 1, 1a passes through the opening 8 of the first electrode 6, 6a of the first pouch cell 4, 4a, and the sleeve nut 36 of the clamping device 14 of the first cell connector 1, 1a passes through the opening 8 of the first electrode 6, 6a of the second pouch cell 4, 4b. In the illustrated embodiment, both the screw 34 and the sleeve nut 36 of the clamping device 14 of the first cell connector 1 , 1a are arranged at least partially in the through-opening 18 of the contact body 12 of the first cell connector 1 , 1a.The screw connection of the clamping device 14 of the second cell connector 1 , 1 b is designed analogously to that of the first cell connector 1 , 1a in the illustrated embodiment.

[0106] In the embodiment shown in Figures 6 and 7, the screw 34 and the sleeve nut 36 each have complementary threaded sections 40 that are arranged completely within the through-opening 18 of the respective contact body 12. In other embodiments, however, the threaded sections 40 can also be arranged at least partially or even completely outside the through-opening 18 of the respective cell connector 1, 1a, 1b.

[0107] As can be seen in Figures 6 and 7, the clamping devices 14 of the first and second cell connectors 1, 1a, 1b can each have two pressure surfaces 44, with the pressure surfaces 44 of the respective cell connectors 1, 1a, 1b being opposite each other in the stacking direction 2. The pressure surfaces 44 can extend perpendicular to the stacking direction 2. One pressure surface 44 of the respective cell connector 1, 1a, 1b is formed here by way of example by the washer 38 of the screw connection of this cell connector 1, 1a, 1b, while the other pressure surface 44 of this cell connector 1, 1a, 1b is arranged by way of example on the side of a head 46 of the sleeve nut 36 facing the contact body 12 of this cell connector 1, 1a, 1b.

[0108] The contact surfaces 44 of the clamping device 14 of the first cell connector 1, 1a can be pressed against the sides of the first electrodes 6, 6a facing away from the contact body 12 of the first cell connector 1, 1a, and the contact surfaces 44 of the clamping device 14 of the second cell connector 1, 1b can be pressed against the sides of the second electrodes 6, 6b facing away from the contact body 12 of the second cell connector 1, 1b. In this way, the clamping devices 14 establish a solid contact between the first electrodes 6, 6a and the contact body 12 of the first cell connector 1, 1a, and between the second electrodes 6, 6b and the contact body 12 of the second cell connector 1, 1b.

[0109] In the illustrated embodiment, the clamping devices 14 of both cell connectors 1, 1a, 1b have a connecting section 48 through which the contact surfaces 44 of the respective cell connectors 1, 1a, 1b are connected and pressed together. In this exemplary embodiment, the connecting sections 48 are formed by parts of the screw 34 and parts of the sleeve nut 36 of the respective cell connectors 1, 1a, 1b and completely penetrate the through-openings 18 of the contact body 12 of the respective cell connectors 1, 1a, 1b. Of course, the connecting sections 48 can also be designed differently, for example as monolithic pins.

[0110] Fig. 8 shows a plurality of pouch cell assemblies 42 arranged one above the other or, synonymously, next to each other in the stacking direction 2, each provided with a cover 50. In the illustrated embodiment, the covers 50 enclose the first and second cell connectors 1, 1a, 1b and the first and second electrodes 6, 6a, 6b of the respective pouch cell assembly 42. The covers 50 can each have a positive locking arrangement 52 comprising positive locking elements 54. In the embodiment shown in Fig. 8, each cover 50 has two positive locking elements 54 configured as recesses 54a. The recesses 54a of the respective cover 50 are, by way of example, arranged centrally on the longitudinal sides of the cover 50 facing in the stacking direction 2.

[0111] The positive locking arrangements 52 of the covers 50 from Fig. 8 can also have at least one positive locking element 54 designed as a separate positive locking body 54b. For the sake of clarity, these separate positive locking bodies 54, 54b are not shown in Fig. 8, but rather a single separate positive locking body 54, 54b is shown in Fig. 10. In the embodiment shown in Figs. 8 and 10, the separate positive locking elements 54, 54b are designed to be complementary to the recesses 54, 54a, so that each separate positive locking body 54, 54b of a cover 50 is designed to be complementary to both recesses 54, 54a of this cover 50. Since the covers 50 are identically designed in the present embodiment, each separate positive locking element 54, 54b of one cover 50 can engage in the recesses 54, 54a of each of the other covers 50.

[0112] As can be seen particularly well in the detailed view of the covers 50 from Fig. 8 shown in Fig. 9, the covers 50 can have at least one opening 56 in which – if present – ​​the at least one contact pin 20 of the cell connector 1, 1a, 1b enclosed by the respective cover 50 can be received or accommodated. In the embodiment shown in Fig. 8, in which each cell connector 1, 1a, 1b has a contact pin 20, each of these contact pins 20 projects through an opening 56 of the cover 50 surrounding this cell connector 1, 1a, 1b.

[0113] Fig. 11 shows a battery pack 58 in which the covers 50 of the pouch cell arrangements 42, stacked one above the other in direction 2 and shown in Fig. 8, are each positively connected to one another. In the embodiment shown, in which the covers 50 of the pouch cell arrangements 42 are identically designed, a positive-locking element 54 of one cover 50, designed as a recess 54, 54a, adjoins a positive-locking element 54 of an adjacent cover 50 in the stack direction 2. The positive locking elements 54 of two adjacent covers 50, which are designed as recesses 54, 54a and adjoin each other in the stacking direction 2, are, in the illustrated embodiment, each positively connected by one of the separate positive locking elements 54, 54b inserted into the recesses 54, 54a. Since the recesses 54, 54a in the embodiment shown in Fig. 11, as can be seen in Fig.As can be clearly seen in Figure 9, the recesses 54, 54a are connected to each other in the stacking direction 2 in a tensile-resistant manner with the separate form-locking elements 54, 54b.

[0114] Fig. 12 shows the battery pack 58 from Fig. 11 with a plurality of busbars 62. Each busbar 62 connects the contact pin 20 of a cell connector 1, 1a, 1b of one pouch cell assembly 42 to the contact pin 20 of a cell connector 1, 1a, 1b of another pouch cell assembly 42. In this way, the pouch cell assemblies 42 of a battery pack 58 can be electrically connected to one another. Depending on whether the pouch cell assemblies 42 are to be connected in series or in parallel, any two contact pins 20 connected by a busbar 62 can have the same or different polarities.

[0115] Figures 13 and 14 show sectional views of two further embodiments of a pouch cell arrangement 42. The pouch cell arrangements 42 have a first pouch cell 4, 4a and a second pouch cell 4, 4b located above the first pouch cell 4, 4a in the stacking direction 2, wherein the first electrodes 6, 6a of the pouch cells 4, 4a, 4b are electrically connected to each other by the first cell connector 1, 1a and the second electrodes 6, 6b are connected to each other by the second cell connector 1, 1b. In the present illustration, the stacking direction 2 extends perpendicular to the plane of the image, so that the second pouch cell 4, 4b is obscured by the first pouch cell 4, 4a and is therefore not visible.

[0116] A key difference between the pouch cell arrangements 42 shown in Figures 13 and 14 and other embodiments shown is that the contact bolts 20 are not monolithically formed with the contact body 12 of the first or second cell connector 1, 1a, 1b. In the embodiment shown in Figures 13 and 14, each contact bolt 20 is formed separately from the contact body 12 from which it projects. In the present embodiment, the contact bolts 20 can be designed as screws 68 that can be screwed into, or are screwed into, the contact bodies 12 of the cell connectors 1, 1a, 1b. The contact bodies 12 can also have threaded bores 70, complementary to the screws 68.Of course, in other configurations where the contact bolts 20 are not monolithically formed with the respective contact body 12, they can also have or be formed by connecting elements other than the screws 68. For example, rivets, springs, or pins can serve as contact bolts 20.

[0117] As can be seen from Fig. 13, the pouch cell arrangement 42 can further comprise at least one circuit board 66, which is shown here, purely by way of example, arranged with respect to the longitudinal axes 24 of the contact pins 20 between the heads 68a of the contact pins 20, which are designed as screws 68, and the busbars 62 abutting the contact bodies 12. The circuit board 66 can have openings 69 through which the contact pins 20 of the cell connectors 1, 1a, 1b can protrude. In the present embodiment, the circuit board 66 can be electrically connected to the contact pins 20 and / or to the contact bodies 12 of the cell connectors 1, 1a, 1b. The circuit board 66 and / or the busbars 62 can be pressed against or clamped to the contact bodies 12, in particular by the contact bolts 20 of the cell connectors 1 , 1a, 1b designed as screws 68, in order to ensure a solid electrical contact.

[0118] The pouch cell arrangement 42 shown in Fig. 14 also includes, by way of example, a circuit board 66, which, however, is positioned here between the busbars 62 and the contact bodies 12 of the cell connectors 1, 1a, 1b with respect to the longitudinal axes 24 of the contact pins 20. The busbars 62 can bear against the heads 68a of the contact pins 20, which are designed here as screws 68. In the embodiment shown in Fig. 14, the circuit board 66 can thus be directly—not indirectly via the busbars 62 and the contact pins 20 as shown in Fig. 13—electrically conductively connected to the contact bodies 12.

[0119] The pouch cell arrangements 42 shown in Figures 13 and 14 can further comprise at least one sensor device 64, which can be used to measure the temperature and / or the electrical voltage of the pouch cells 4, 4a, 4b. In the present embodiment, the sensor devices 64 are arranged, purely by way of example, within recesses 72 in the covers 50 and contact the contact bodies 12 of the cell connectors 1, 1a, 1b. The data measured by the sensor device 64, which represent the temperature and / or voltage of the pouch cells 4, 4a, 4b, can, for example, be transmitted by transmission wires 74 to the printed circuit board 66 and processed there. In other embodiments, the at least one sensor device 64 can, of course, also be arranged at other locations and preferably be part of the printed circuit board 66. For this purpose, the sensor device 64 can bePart of the sensor device 64 may, for example, be arranged at interfaces 76 between the circuit board 66 and the contact bodies 12 of the cell connectors 1 , 1a, 1 b (see Fig. 14) in order to measure the temperature and / or electrical voltage of the pouch cells 4, 4a, 4b.

[0120] Fig. 15 shows a pouch cell arrangement 42 according to a further embodiment. In this embodiment, the contact pins 20 of the cell connectors 1, 1a, 1b are also designed as screws 68. However, the longitudinal axes 24 of the contact pins 20 do not extend – as in the embodiment according to Figs. 13 and 14 – parallel to the longitudinal axes 78 of the pouch cells 4, 4a, 4b and parallel to the electrodes 6, 6a, 6b, but perpendicular to the longitudinal axes 78 of the pouch cells 4, 4a, 4b and parallel to the electrodes 6, 6a, 6b. As can be seen from Fig. 15, the longitudinal axis 24 of the contact pin 20 of the first cell connector 1, 1a can, in particular, be aligned with the longitudinal axis 24 of the contact pin 20 of the second cell connector 1, 1b. In addition, at least two circuit boards 66 can be provided in the pouch cell arrangement 42 according to Fig. 15, each of which is electrically connected either to the first cell connector 1 , 1a or to the second cell connector 1 , 1b.In the present embodiment, the circuit boards 66 are arranged, purely by way of example, parallel to each other and parallel to the longitudinal direction 78 of the pouch cells 4, 4a, 4b and extend along narrow sides 80 of the pouch cells 4, 4a, 4b.

[0121] Reference sign

[0122] 1, 1a, 1b cell connector

[0123] 2 Stacking direction

[0124] 4, 4a, 4b Pouch cell

[0125] 6, 6a, 6b Electrode

[0126] 8 Opening

[0127] 10 Rand

[0128] 12 contact bodies

[0129] 14 Clamping device

[0130] 16 electrode contact surfaces

[0131] 18 Passage opening

[0132] 20 contact bolts

[0133] 22 sockets

[0134] 24 Longitudinal axis of the contact bolt

[0135] 26 Cross-section of the base

[0136] 28th phase

[0137] 30 Section with flat side surface

[0138] 32 flat side surface

[0139] 34 screw

[0140] 36 sleeve nut

[0141] 38 Washer

[0142] 40 section with thread

[0143] 42 Pouch cell arrangement

[0144] 44 pressure surface

[0145] 46 Head of the sleeve nut

[0146] 48 Connecting section

[0147] 50 Coverage

[0148] 52 Positive locking arrangement

[0149] 54 Positive locking element

[0150] 54a Recess

[0151] 54b Positive locking body

[0152] 56 Opening in the cover

[0153] 58 Battery pack 60 Undercut

[0154] 62 busbar

[0155] 64 Sensor device

[0156] 66 Circuit board 68 Screw

[0157] 68a Head of the screw

[0158] 69 Opening the circuit board

[0159] 70 bore

[0160] 72 Recess 74 Transmission wires

[0161] 76 Interface

[0162] 78 Longitudinal axis of a pouch cell

[0163] 80 Narrow side of a pouch cell

Claims

Claims 1. Cell connector (1 , 1a, 1b) for pouch cell arrangements (42) of a battery pack (58), wherein the cell connector (1 , 1a, 1b) is configured to connect two pouch cells (4, 4a, 4b) arranged one above the other in a stacking direction (2), each with a first and a second electrode (6, 6a, 6b) through which an opening (8) extends in the stacking direction (2), and further comprises: - an electrically conductive contact body (12) configured to electrically connect the first electrodes (6, 6a) in the stacking direction (2), wherein the contact body (12) has two electrode support surfaces (16) arranged parallel to each other in the stacking direction (2), and wherein the contact body (12) is penetrated by a through-opening (18) extending in the stacking direction (2) between the electrode support surfaces (16); and - a clamping device (14) arranged at least partially in the through-opening (18), which is designed to press each of the first electrodes (6, 6a) against at least one of the electrode support surfaces (16).

2. Cell connector (1 , 1a, 1b) according to claim 1 , wherein the contact body (12) is substantially cuboid in shape.

3. Cell connector (1 , 1a, 1b) according to claim 1 or 2, wherein the cell connector (1 , 1a, 1b) has at least one contact bolt (20) projecting from the contact body (12).

4. Cell connector (1 , 1a, 1b) according to claim 3, wherein the at least one contact bolt (20) has a base (22) at its end facing the contact body (12), the cross-section (26) of which is larger than a cross-section of the remaining contact bolt (20).

5. Cell connector (1 , 1a, 1b) according to claim 3 or 4, wherein the at least one contact bolt (20) has at least one section (30) with a flat side surface (32) which is flush with a side surface (32) of the contact body (12) pointing in the stacking direction (2).

6. Cell connector (1 , 1a, 1 b) according to one of claims 3 to 5, wherein the at least one contact bolt (20) is formed by a screw (72) screwed into the contact body (12).

7. Pouch cell arrangement (42) for a battery pack (58), comprising a first pouch cell (4, 4a) and a second pouch cell (4, 4b) located above the first pouch cell (4, 4a) in a stacking direction (2), wherein the pouch cells (4, 4a, 4b) each have a first electrode (6, 6a) and a second electrode (6, 6b) which are each penetrated by an opening (8) in the stacking direction (2), wherein the first electrode (6, 6a) of the first pouch cell (4, 4a) is located above the first electrode (6, 6a) of the second pouch cell (4, 4b) in the stacking direction (2), and the second electrode (6, 6b) of the first pouch cell (4, 4a) is located above the second electrode (6, 6b) of the second pouch cell (4, 4b) in the stacking direction (2), and with a first cell connector (1 , 1a), wherein the first cell connector (1 , 1a) has: - an electrically conductive contact body (12) through which a through-opening (18) is traversed in the stacking direction (2), which is arranged at least sectionally between the first electrode (6, 6a) of the first pouch cell (4, 4a) and the first electrode (6, 6a) of the second pouch cell (4, 4b) and electrically connects the first electrodes (6, 6a), and - a clamping device (14) by which the first electrode (6, 6a) of the first pouch cell (4, 4a) and the first electrode (6, 6a) of the second pouch cell (4, 4b) are pressed against the contact body (12) of the first cell connector (1 , 1a).

8. Pouch cell arrangement according to claim 6, with a second cell connector (1 , 1 b), wherein the second cell connector (1 , 1 b) comprises: - an electrically conductive contact body (12) through which a through-opening (18) extends in the stacking direction (2), which is arranged at least sectionally between the second electrode (6, 6b) of the first pouch cell (4, 4a) and the second electrode (6, 6b) of the second pouch cell (4, 4b) and electrically connects the second electrodes (6, 6b), and - a clamping device (14) by which the second electrode (6, 6b) of the first pouch cell (4, 4a) and the second electrode (6, 6b) of the second pouch cell (4, 4b) are pressed against the contact body (12) of the second cell connector (1 , 1 b).

9. Pouch cell arrangement (42) according to claim 6 or 7, wherein the clamping device (14) of the first cell connector (1, 1a) has at least two opposing pressure surfaces (44) in the stacking direction (2), and / or wherein the clamping device (14) of the second cell connector (1, 1b) has at least two opposing pressure surfaces (44) in the stacking direction (2), and wherein each pressure surface (44) of the clamping device (14) of the first cell connector (1, 1a) is pressed against one of the sides of the first electrodes (6, 6a) facing away from the contact body (12) of the first cell connector (1, 1a), and / or wherein each pressure surface (44) of the clamping device (14) of the second cell connector (1, 1b) is pressed against one of the sides of the second electrodes (6, 6a) facing away from the contact body (12) of the second cell connector (1, 1b). 6b) is pressed.

10. Pouch cell arrangement (42) according to claim 8, wherein the clamping device (14) of the first and / or second cell connector (1, 1a, 1b) has at least one connecting section (48) connecting the pressure surfaces (44), by which the pressure surfaces (44) are pressed towards each other, wherein the connecting section (48) of the clamping device (14) of the first cell connector (1, 1a) at least partially penetrates and / or wherein the connecting section (48) of the clamping device (14) of the second cell connector (1 , 1 b) penetrates at least section by the through opening (18) of the contact body (12) of the second cell connector (1 , 1 b).

11. Pouch cell arrangement (42) according to any one of claims 6 to 9, wherein the pouch cell arrangement (42) has at least one cover (50) that surrounds the first and / or the second electrodes (6, 6a, 6b) and the first and / or the second cell connector (1 , 1a, 1 b) at least sectionally.

12. Pouch cell arrangement (42) according to any one of claims 7 to 11, wherein the first cell connector (1, 1a) has at least one electrically conductive contact pin (20) projecting from the contact body (12) of the first cell connector (1, 1a) and / or the second cell connector (1, 1b) has at least one electrically conductive contact pin (20) projecting from the contact body (12) of the second cell connector (1, 1b), and wherein the pouch cell arrangement (42) has at least one printed circuit board (66), wherein each contact pin (20) projects at least partially through an opening (69) of the printed circuit board (66), and wherein the at least one printed circuit board (66) is electrically connected to the contact body (12) and / or the contact pin (20) of the first and / or second cell connector (1, 1a, 1b).

13. Pouch cell arrangement (42) according to one of claims 7 to 12, wherein the pouch cell arrangement (42) has at least one sensor device (64) configured to measure a temperature and / or electrical voltage of the first and / or second pouch cell (4, 4a, 4b).

14. Pouch cell arrangement (42) according to claim 13, wherein the at least one sensor device (64) is part of the at least one printed circuit board (66).

15. Battery pack (58), in particular for powering electric light vehicles, comprising a plurality of pouch cell arrangements (42) stacked one above the other in the stacking direction (2) according to one of claims 7 to 14 and comprising a plurality of busbars (62), wherein each of the busbars (62) connects the first or second cell connection the (1, 1a, 1b) electrically connects one of the pouch cell arrangements (42) to the first or second cell connector (1, 1a, 1b) of another pouch cell arrangement (42).

Images