Pouch cell assembly for a battery pack, battery pack, and housing assembly therefor, in particular for lightweight vehicles and electrical devices

Abstract

The invention relates to a pouch cell assembly (20) having a first pouch cell (1a) which has a first electrode (2a) and a second electrode (4a); a second pouch cell (1b) which has a first electrode (2b) and a second electrode (4b), the first electrode (2a) of the first pouch cell (1a) lying above the first electrode (2b) of the second pouch cell (1b) in a stacking direction (22); a spacer (24, 24a) which lies between the first electrode (2a) of the first pouch cell (1a) and the first electrode (2b) of the second pouch cell (1b), the spacer (47a) electrically conductively connecting the first electrode (2a) of the first pouch cell (1a) to the first electrode (2a) of the second pouch cell (1b); a printed circuit board assembly (31) having a printed circuit board (32) which is offset transversely with respect to the stacking direction (22) and is situated next to the spacer (24, 24a) and so as to extend parallel to the stacking direction (22), the printed circuit board (32) being electrically connected to the first electrode (2a) of the first pouch cell (1a) and / or to the first electrode (2b) of the second pouch cell (1b); and a clamping system (5) which is designed to generate a force which presses the first electrode (2a) of the first pouch cell (1a), the spacer (47a), and the first electrode (2b) of the second pouch cell (1b) toward one another. The invention further relates to a battery pack (50), in particular for lightweight vehicles, comprising a plurality of pouch cell assemblies (20) arranged one above the other in the stacking direction (22) and a housing (56) for receiving a plurality of battery packs.

Description

[0001] Pouch cell arrangement for a battery pack, battery pack, and a housing arrangement therefor, especially for light vehicles and electrical appliances

[0002] The invention relates to a pouch cell arrangement for a battery pack, a battery pack with at least two such pouch cell arrangements, a housing arrangement for receiving the at least two pouch cell arrangements or the battery pack, and a light vehicle with the at least two pouch cell arrangements or the battery pack.

[0003] Rechargeable battery packs are used in electrical appliances and light vehicles, such as e-bikes and electric scooters, as drive batteries for a motor. Battery packs are also used in cordless power tools. These packs are often made up of pouch cells. Several pouch cells are connected in series and / or parallel so that the battery pack can deliver the necessary voltage and power.

[0004] There is a need to integrate such pouch cell assemblies and battery packs easily and safely into the respective devices. The invention aims to provide a pouch cell assembly that meets these requirements.

[0005] This objective is achieved by a pouch cell arrangement comprising a first pouch cell having a first electrode and a second electrode, a second pouch cell having a first electrode and a second electrode, wherein the first electrode of the first pouch cell is positioned above the first electrode of the second pouch cell in a stacking direction, a spacer located between the first electrode of the first pouch cell and the first electrode of the second pouch cell, the spacer electrically connecting the first electrode of the first pouch cell to the first electrode of the second pouch cell, and a printed circuit board arrangement comprising a printed circuit board arranged transversely to the stacking direction next to the spacer and extending parallel to the stacking direction, the printed circuit board being electrically connected to the first electrode of the first pouch cell and / or the first electrode of the second pouch cell.and with a clamping system designed to generate a force pressing the first electrode of the first pouch cell, the spacer and the first electrode of the second pouch cell towards each other.

[0006] This arrangement enables a mechanically stable design of the pouch cell assembly. The circuit board is positioned between the first two electrodes in a space-saving manner and allows for monitoring of the pouch cells.

[0007] The following describes advantageous, independent, and arbitrarily combinable further developments. According to one such development, the pouch cells can have a pouch section in which the active components of the pouch cell are arranged. Within this pouch section, the active components can be surrounded by a film, for example, an aluminum foil, a film containing or consisting of another metal, or a plastic film.

[0008] The bag section can be designed as a flat body, for example as a flat cuboid or, more generally, as a flat polyhedron. The bag section can have two flat sides on two opposite sides, which may be oriented perpendicular to the stacking direction. The two opposite flat sides can be connected by narrow sides, particularly circumferentially. The first and second electrodes can be arranged on one of the narrow sides, the end face, and may extend into the interior of the bag section, i.e., through the film.

[0009] In the pouch cell arrangement, the first and second pouch cells, in particular their pouch sections, can be stacked on top of each other. The pouch sections can lie directly on top of each other, for example, by the films or, in particular, the rigid side walls of the stacked pouch cells supporting each other.

[0010] At least one narrow side of the first and / or second pouch cell, preferably two opposing narrow sides, can have a substantially rigid sidewall. This facilitates stacking the pouch cells or pouch sections on top of each other. In particular, the two narrow sides facing the width can each be provided with such a sidewall.

[0011] The electrodes can have two flat sides whose normal direction runs parallel to the stacking direction. The flat sides of the electrodes can run parallel to the flat sides of the pouch section. This creates a flat pouch cell. The electrodes can be tab-shaped, tab-shaped, or designed as clamps.

[0012] The term "first" electrode does not refer to its polarity, but merely distinguishes the "first" from the "second" electrode. The first electrode of the first pouch cell can therefore be either the positive or the negative pole of the first pouch cell. Similarly, the second electrode of the first pouch cell can be the opposite pole, i.e., the negative or the positive pole of the first pouch cell. The polarity assignment of the first and second electrodes of the second pouch cell is independent of the polarity assignment of the first and second electrodes of the first pouch cell. For example, the first electrode of the first pouch cell can be the negative pole and the first electrode of the second pouch cell the positive pole of their respective pouch cells. Likewise, the first electrodes of the first and second pouch cells can each have the same polarity.

[0013] In one embodiment, the second electrode of the first pouch cell can also be arranged above the second electrode of the second pouch cell in the stacking direction. In this case, the pouch cell arrangement can include a further, second spacer located between the second electrode of the first pouch cell and the second electrode of the second pouch cell. Depending on the application, the second electrode of the first pouch cell can either be electrically connected to the second electrode of the second pouch cell or galvanically isolated from it. The additional spacer can be conductive or non-conductive, as appropriate. For example, in a series connection, the second spacer can be non-conductive. In a parallel connection, both the first spacer connecting the two first electrodes and the second spacer can be conductive.

[0014] A conductive spacer can be made of a metal material containing, for example, copper and / or aluminum. A non-conductive spacer can be made of a ceramic material or a plastic. In a simple design, the first and / or second spacer can be turned parts. Of course, the first and / or second spacer can also be milled and / or cast, either alternatively or in combination.

[0015] The first and second electrodes of a pouch cell can be located on the same narrow side or on different narrow sides, particularly on two opposite narrow sides. The first and second electrodes can be spaced apart transversely to the stacking direction. The direction in which the first and second electrodes are spaced apart when they are located on the same narrow side is referred to below as the width direction. The direction in which the first and second electrodes are spaced apart when they are located on opposite narrow sides of a pouch cell is referred to below as the length direction.

[0016] Alternatively, the first and second pouch cells can be positioned opposite each other transversely to the stacking direction and, in particular, also transversely to the width direction or longitudinally. In both cases, it is possible to arrange the first and second electrodes one above the other in the stacking direction. The clamping system can be designed differently depending on requirements. In one embodiment, for example, it can clamp around the first and / or second electrodes positioned one above the other in the stacking direction, i.e., a first and / or a second electrode stack. In another embodiment, the clamping system is designed for repeated, non-destructive use. This means that it can be disassembled and reused, for example, if a pouch cell in the pouch cell arrangement needs to be replaced. In one embodiment, the clamping system is galvanically isolated from the first and second electrodes of the first and second pouch cells.

[0017] The clamping system can alternatively or cumulatively include at least one retaining bolt extending in the stacking direction, for example a rod or pin, a threaded rod, a threaded bolt or a screw.

[0018] To ensure that the force applied by the clamping system in the stacking direction is exerted as centrally as possible on the electrodes, the first electrodes of the first and second pouch cells and / or the second electrodes of the first and second pouch cells can each have a recess through which the retaining bolt protrudes. At least one printed circuit board can also have such a recess.

[0019] Thus, a (first) retaining bolt can penetrate the first electrodes of the first and second pouch cells and the circuit board located between these two first electrodes. A further, or second, retaining bolt can penetrate the second electrodes of the first and second pouch cells and the circuit board located between these two second electrodes.

[0020] The recess can be designed as a through-hole or a recess in an electrode or the circuit board. The first and / or second retaining bolt then extends through the respective through-hole or recess.

[0021] The at least one retaining bolt can be used not only to create a mechanical connection between an electrode stack in the stacking direction, but also to align the electrodes and the at least one circuit board as precisely as possible with each other. Advantageously, head elements can be arranged at at least one or each end of the first and / or second retaining bolt located in the stacking direction, by which the battery pack is held together in the stacking direction. The first and second electrodes of the first and second pouch cells, with the circuit board between them, can be arranged between two head elements. If the clamping system has a threaded connection, this offers the advantage that, for example, the head element can be repeatedly detached from its associated retaining bolt without damaging the electrodes and the pouch cells.The first and / or second retaining bolts can also be designed to be removable from the recesses without damage. With this design, it is possible to repeatedly disassemble the circuit board and electrode assembly so that each pouch cell in the pouch cell array can be individually removed and replaced. This can be achieved, for example, by designing the first and / or second retaining bolt as a threaded rod, screw, or bolt. The head element can be, for example, a screw head or a nut. A stamping plate can be arranged between the electrode stack of the first electrodes and / or the stack of the second electrodes to distribute the force more evenly and simplify assembly.

[0022] In one embodiment, the retaining pins can be galvanically isolated from the first and / or second electrodes of the first and second pouch cells. For example, at least one of the retaining pins can be enclosed in an insulating sleeve made of an insulating material. The insulating sleeve is positioned between an electrode and the retaining pin extending through that electrode. This is, of course, only necessary if the retaining pins are made of an electrically conductive material, such as a metal. However, the pins can also be made of a non-conductive material, such as a plastic or a composite material.

[0023] Alternatively, the retaining bolt can extend alongside the first and / or second electrodes in the stacking direction, so that it does not penetrate the electrodes.

[0024] The power and / or capacity of a single pouch cell is typically insufficient for the reliable operation of an electrical appliance or light vehicle. Therefore, pouch cells often need to be connected in series or parallel in pouch cell configurations. Such a circuit requires that at least one electrode of the first pouch cell be electrically connected to at least one electrode of the second pouch cell, for example, the positive terminal of the first pouch cell to the negative terminal of the second pouch cell, or the positive terminal of the first pouch cell to the positive terminal of the second pouch cell. In one embodiment, the printed circuit board establishes this connection between two electrodes stacked on top of each other to keep the current paths as short as possible.

[0025] When connecting pouch cells in parallel, it may be necessary to separate the first and second cells.

[0026] The electrode of the first pouch cell is to be electrically connected to the first and second electrodes of the second pouch cell. In one embodiment, this can be achieved by having the second spacer electrically connect the second electrode of the first pouch cell and the second electrode of the second pouch cell to each other; and by having the circuit board arrangement include a circuit board positioned transversely to the stacking direction, next to the conductive spacer and extending parallel to the stacking direction, which is electrically connected to the second electrode of the first pouch cell and / or the second electrode of the second pouch cell. In this case, the second spacer is therefore also conductive, like the spacer between the two first electrodes of the pouch cell arrangement.

[0027] The conductor arrangement can comprise one or more printed circuit boards (PCBs). A PCB can be electrically connected to one or more electrode stacks, in particular the conductive spacers of several electrode stacks. For example, the PCB electrically connected to the second electrode of the first pouch cell and / or the second electrode of the second pouch cell and the PCB electrically connected to the first electrode of the first pouch cell and / or the first electrode of the second pouch cell can be identical. In this configuration, only one PCB needs to be assembled, which significantly simplifies the assembly. The PCB can be arranged such that the first and second electrodes of the pouch cell arrangement are located between the PCB and the pouch sections of the first and second pouch cells. Alternatively, the PCB can be arranged between the first and second electrodes.

[0028] The at least one printed circuit board of the printed circuit board arrangement can be connected to the conductive spacers of at least one electrode stack by means of a screw connection, a solder connection, a clip or a clamp, by pressing in or similar means.

[0029] The circuit board may have a connector, for example in the form of a header, via which the board can be connected to a battery management system.

[0030] For connection to the electrical spacers of the at least one electrode stack, the at least one printed circuit board can be equipped with conductor tracks.

[0031] In one embodiment, the second electrode of the first pouch cell and / or the second electrode of the second pouch cell can be in contact with the printed circuit board (PCB). Alternatively, the second electrode of the first pouch cell and the second electrode of the first pouch cell can also be galvanically isolated by the PCB. In one embodiment, the PCB can have a first conductor track that contacts the second electrode of the first pouch cell. The PCB can have a second conductor track, not directly electrically connected to the first, that contacts the second electrode of the second pouch cell. The PCB can have a contact area at the point where the second electrode of the first pouch cell contacts the PCB and / or at the point where the second electrode of the second pouch cell contacts the PCB, which is connected to the current sensor.The contact area can be formed by the end of the first or second conductor track. Each of these conductor tracks can be connected to a current sensor.

[0032] The circuit board can contain at least one electronic component. This at least one electronic component can be configured to monitor the first pouch cell and / or the second pouch cell. Such monitoring can be achieved, for example, using the conductor tracks mentioned above.

[0033] For example, the printed circuit board can include at least one current sensor as an electronic component, configured to measure the voltage and / or current of the first and / or second pouch cell. In particular, such a current sensor can be used to monitor each individual pouch cell of the pouch cell assembly separately. A separate current sensor can be provided for each pouch cell of the pouch cell assembly. The current sensor is then connected to the first and second electrodes of the pouch cell whose current and / or voltage it is configured to measure. The current sensor can, for example, be conductively connected to the via.

[0034] In one embodiment, the printed circuit board can include at least one temperature sensor as an electronic component. In particular, each pouch cell can be assigned its own separate temperature sensor. The printed circuit board can have a thermal bridge that connects the temperature sensor to its assigned pouch cell. In another embodiment, the temperature sensor can also be in direct contact with its assigned pouch cell of the pouch cell arrangement, in particular with the pouch section or one of the two electrodes of the pouch cell.

[0035] The at least one temperature sensor and / or the at least one current sensor can also be located at a distance from the circuit board. For example, the temperature sensor can be attached to an electrode, a section of a pouch, or a conductive or non-conductive spacer. In such a configuration, the at least one circuit board of the circuit board assembly can merely provide the conductive traces to which the electronic components are connected and which lead to the aforementioned header.

[0036] A battery pack can be easily constructed from the pouch cell arrangement in one of the above configurations, which can serve as an energy source, for example, to power an electrically powered light vehicle or an electrical device.

[0037] Such a battery pack has at least two pouch cell arrangements in one of the above configurations, i.e., at least a first pouch cell arrangement and a second pouch cell arrangement. The first and second pouch cell arrangements are stacked on top of each other in the stacking direction.

[0038] In one embodiment, the battery pack comprises at least one conductive spacer and at least one non-conductive spacer. The spacers can be designed, for example, as turned parts, in particular as spacer rings. Each spacer can be penetrated by one of the retaining bolts. For this purpose, each spacer can be provided with a recess, in particular a through-hole.

[0039] The conductive spacer electrically connects the two electrodes of the first and second pouch cell arrangements, which are arranged directly on top of each other in the stacking direction, while the non-conductive spacer galvanically isolates the two electrodes of the first pouch cell arrangement and the second pouch cell arrangement, which are arranged directly on top of each other in the stacking direction.

[0040] For example, the conductive spacer electrically connects the first electrode of the second pouch cell of the first pouch cell array to the first electrode of the first pouch cell of the second pouch cell array, which is directly opposite in the stacking direction. The non-conductive spacer then separates the second electrode of the second pouch cell of the first pouch cell array from the second electrode of the first pouch cell of the second pouch cell array.

[0041] Alternatively, the conductive spacer can electrically connect the second electrode of the second pouch cell of the first pouch cell assembly to the second electrode of the first pouch cell of the second pouch cell assembly, while the non-conductive spacer galvanically isolates the first electrode of the second pouch cell of the first pouch cell assembly from the first electrode of the first pouch cell of the second pouch cell assembly. Again, alternatively, the conductive spacer can electrically connect the first electrode of the second pouch cell of the first pouch cell assembly to the second electrode of the first pouch cell of the second pouch cell assembly, while the non-conductive spacer separates the second electrode of the second pouch cell of the first pouch cell assembly from the first electrode of the first pouch cell of the second pouch cell assembly.

[0042] Alternatively, a conductive spacer can electrically connect the second electrode of the second pouch cell of the first pouch cell array to the second electrode of the first pouch cell of the second pouch cell array, while another conductive spacer can electrically connect the first electrode of the second pouch cell of the first pouch cell array to the first electrode of the first pouch cell of the second pouch cell array that is directly opposite it, particularly in the stacking direction. This type of connection allows, for example, a parallel connection of pouch cell arrays stacked one above the other.

[0043] With these alternative configurations, any sequence of series and parallel connections between stacked pouch cell arrangements is therefore possible.

[0044] The pouch cell arrays of a battery pack can be nested. This means that the second pouch cell of one array is simultaneously the first pouch cell of the next array in the stacking direction. The second electrode of the second pouch cell of a pouch cell array can be the first electrode of the first pouch cell of the next array, and vice versa. The first electrodes of a pouch cell array are always connected to each other by a conductive spacer, and the second electrodes of the pouch cell array are either connected to each other by a conductive spacer or galvanically isolated from each other by a non-conductive spacer, depending on whether the array is in parallel or series.

[0045] If the battery pack has more than two pouch cell assemblies, each pair of such a battery pack consisting of directly adjacent pouch cell assemblies can be considered to be composed of a first pouch cell assembly and a second pouch cell assembly. A housing adapted to the pouch cell assembly in one of the above embodiments and / or the battery pack with at least two such pouch cell assemblies may be provided.

[0046] Such a housing has multiple battery pack receptacles, each holding or accommodating a battery pack. The housing also features a stacking clamp designed to compress the pouch sections of the cells arranged in a battery pack receptacle in the stacking direction. This prevents the pouch sections from inflating and mechanically stabilizes the battery pack.

[0047] A circuit board of the circuit board assembly of a battery pack can also be connected to the conductive spacers or electrodes of another battery pack, so that fewer circuit boards are needed.

[0048] The stacking clamping device can further include a pressure plate arranged in the housing, which can be fixed in various positions spaced apart from one another in the stacking direction. The pressure plate is particularly arranged and designed to press against a pouch section of the uppermost or lowermost pouch cell of the pouch cell arrangement or battery pack in the stacking direction.

[0049] The pressure plate can be designed to be repeatedly fixed in spaced-apart positions, for example, by using a clamping device with a thread or lever. This makes it possible to release the force pressing the pouch sections against each other and to remove the pouch cell assemblies or the battery pack from the housing. The pressure plate can be stationary within the housing or stationary on the pouch sections.

[0050] The housing is formed from a profile tube, for example, an extruded or rolled profile. The housing can be made of a metal material, such as aluminum, a plastic, or a composite material. It can, in particular, be part of the frame of a light vehicle or the housing of a power tool. The battery management system can be located within the housing.

[0051] In one embodiment, two pressure plates opposite each other in the stacking direction can be provided, between which the pouch sections of stacked pouch cells are arranged. Both pressure plates can be repeatedly fixed in different positions spaced apart from each other in the stacking direction. In this way, the stack of pouch cells can be compressed on both sides.

[0052] In another embodiment, the pouch sections of the pouch cells of a battery pack are arranged between the pressure plate and a bridge or bulkhead of the housing, so that the pouch sections can be pressed against the bridge or bulkhead by the pressure plate.

[0053] Busbars can be arranged between the pressure plate and the housing to tap into the electrical power supplied by the pouch cell assemblies.

[0054] In a further embodiment, the housing can have a guide through which the pressure plate is guided in a straight line in the stacking direction.

[0055] The guide can be designed to create a positive fit only in the lateral direction, so that the pressure plate can be inserted into the housing in the longitudinal direction of the profile, the longitudinal direction preferably being perpendicular to the stacking direction and the lateral direction. Such a guide facilitates the insertion of the battery pack and prevents the pressure plate from tilting in the housing.

[0056] Finally, a pouch cell arrangement as described above, or a battery pack as described above, can be used in a light vehicle as the traction battery for the drive motor. A light vehicle is defined as a single- or multi-track vehicle with a total weight of less than 800 kg. The light vehicle may also have a housing as described above in which the battery pack is located.

[0057] The following are exemplary embodiments explained with reference to the accompanying drawings. Individual features of each embodiment may be omitted in accordance with the above explanations if the technical effect associated with these features is not relevant for a particular application. Conversely, a feature described above that is not present in an embodiment may be added in accordance with the above explanations if the technical effect associated with the added feature is relevant for a particular application. The same reference numerals are used in the figures for features that correspond to each other in terms of function and / or structure.

[0058] They show:

[0059] Fig. 1 is a schematic perspective view of an embodiment of a pouch cell;

[0060] Fig. 2 shows a schematic perspective view of another embodiment of a pouch cell;

[0061] Fig. 3 shows a schematic perspective view of another embodiment of a pouch cell;

[0062] Fig. 4 shows a schematic side view of a pouch cell arrangement;

[0063] Fig. 5 shows a schematic side view of another embodiment of a pouch cell arrangement;

[0064] Fig. 6 shows a schematic side view of another embodiment of a pouch-

[0065] Cell arrangement;

[0066] Fig. 7 shows a schematic side view of another embodiment of a pouch-

[0067] Cell arrangement;

[0068] Fig. 8 shows a schematic side view of a battery pack;

[0069] Fig. 9 shows a schematic side view of another embodiment of a battery pack;

[0070] Fig. 10 shows a schematic view of a printed circuit board arrangement;

[0071] Fig. 11 shows a schematic view of another arrangement of a printed circuit board;

[0072] Fig. 12 shows a schematic view of another arrangement of a printed circuit board;

[0073] Fig. 13 shows a schematic top view of another embodiment of a battery pack;

[0074] Fig. 14 shows a schematic view along line AB of Fig. 13;

[0075] Fig. 15 is a schematic perspective view of a housing for receiving battery packs; Fig. 16 is a top view of the housing of Fig. 15 with battery packs.

[0076] Fig. 1 shows a pouch cell 1, which has a first electrode 2 and a second electrode 4. The designations "first" electrode and "second" electrode are intended only to distinguish the two electrodes 2 and 4 from one another. This designation does not imply a specific polarity assignment for the electrode. Thus, the first electrode 2 can form the positive or the negative pole of the pouch cell 1, while the second electrode then forms the corresponding opposite pole.

[0077] The pouch cell 1 may further comprise a pouch section 6. Within pouch section 6, the active layers of the pouch cell are enclosed in a film 8. The first and second electrodes 2, 4 project away from pouch section 6. They may extend into the interior of pouch section 6.

[0078] The pouch cell 1 can, in particular, have two opposing flat sides 10, which can be connected to each other by narrow sides 12. The first and second electrodes 2, 4 can, in particular, project from a narrow end face. On one or more narrow sides 12, for example, the longer narrow sides or the narrow sides adjoining the narrow end face, the pouch section 6 can be provided with rigid side walls 16.

[0079] The first and second electrodes 2, 4 are, for example, flat bodies whose flat sides 14 run parallel to the flat sides 10 of the bag section 6. The first electrode 2 and the second electrode 4 can, in particular, be clamp-shaped, tab-shaped, or, synonymously, tab-shaped.

[0080] Optionally, the first and second electrodes 2, 4 can be provided with a continuous recess 17. The recess 17 can be in the form of a hole; in Fig. 1, for example, this is a through-hole. Fig. 2 shows an alternative embodiment of the recess 17 of the first and second electrodes 2, 4, which here is designed as a recess, for example, in the form of a slot open on one side. The recesses 17 of the two electrodes 2, 4 do not have to have the same shape. It is also possible for only one electrode 2, 4 to be provided with a recess 17.

[0081] If the electrodes 2, 4 are arranged on the same narrow side 12, they are spaced apart from each other in a lateral direction 18. Fig. 3 shows an embodiment of a pouch cell 1 in which the electrodes 2, 4 are arranged on opposite narrow sides 12. In this case, the electrodes 2, 4 are spaced apart from each other in a longitudinal direction 19. The longitudinal direction 19 and the lateral direction 18 can be perpendicular to each other. The electrodes 2, 4 of the pouch cell 1 shown here, by way of example, do not have any recesses 17.

[0082] A single pouch cell 1 is usually insufficient to power, for example, the motor of an electrical appliance or a light vehicle for a sufficiently long time or to deliver sufficient power. Therefore, several pouch cells are connected in series and / or parallel to each other. In this way, the required voltage and power can be supplied to the motor.

[0083] Fig. 4 shows a pouch cell arrangement 20 with a first pouch cell 1a and a second pouch cell 1b, which are interconnected. The viewing direction is in the longitudinal direction 19 (Figs. 1, 2). The pouch cells 1a and 1b are configured as shown in Fig. 1. In particular, the first and second pouch cells 1a, 1b can be configured identically.

[0084] Insofar as a distinction must be made below between the individual first electrodes 2 and the individual second electrodes 4 of pouch cells 1a, 1b, the following applies: 2a designates the first electrode of the first pouch cell 1a, and 2b the first electrode of the second pouch cell. 4a designates the second electrode of the first pouch cell 1a, and 4b the second electrode of the second pouch cell 1b. Where this distinction is not important, the reference symbols 2, 4 are used. This nomenclature also applies to pouch cells 1a, 1b, which are grouped under reference symbol 1.

[0085] In the illustrated embodiment, the first electrode 2a of the first pouch cell 1a and the first electrode 2b of the second pouch cell 1b overlap in the stacking direction 22. Likewise, the second electrode 4a of the first pouch cell 1a and the second electrode 4b of the second pouch cell 1b overlap in the stacking direction 22. In particular, the first and second pouch cells 1a, 1b can be arranged such that the recesses 17 of the respective electrodes 2, 4 are aligned with each other in a stacking direction 22. The stacking direction 22 can be perpendicular to the flat sides 10, 14.

[0086] The assignment of the first and second electrodes 2, 4 of the pouch cells 1a, 1b to the positive and negative polarities depends on the specific application. For example, the electrodes 2a, 2b arranged one above the other in the stacking direction 22 can have the same or opposite polarities. In Fig. 3, the arrangement of the two pouch sections 6 opposite each other transversely to the stacking direction 22 is merely an example. An arrangement of the electrodes 2a, 2b or 4a, 4b one above the other in the stacking direction 22 can also be achieved if the pouch sections 6 of the pouch cells 1a, 1b are also arranged one above the other or directly on top of each other in the stacking direction 22. This is explained further below.

[0087] The first electrode 2a of the first pouch cell 1a is electrically connected to the first electrode of the second pouch cell 1b. For this purpose, a spacer 24, which in this case is electrically conductive, is arranged between the two first electrodes 2a, 2b. The spacer 24 can have a recess 17, which then aligns in particular with the recesses of the electrodes 2a, 2b in the stacking direction 22.

[0088] A spacer 24 can also be located between the second electrode 4a of the first pouch cell 1a and the second electrode 4b of the second pouch cell 1b. Depending on the application, this spacer can be conductive or non-conductive. In Fig. 4, for example, the spacer 24 between the second electrodes 4a and 4b is non-conductive.

[0089] The first two electrodes 2a, 2b are pressed together in the stacking direction 22 by a clamping system 26. The clamping system 26 can also press the second two electrodes 4a, 4b together.

[0090] The clamping system 26 can have a retaining bolt 28 that protrudes through the recesses 17. The retaining bolt 28 can, for example, be formed by a screw. Instead of a screw, a threaded rod, a pin, or a bar can also be used. The first electrodes 2a, 2b, which are arranged one above the other, with the spacer 24 between them, can be positioned between two head sections 30, for example, between a screw head and a nut. Of course, instead of a threaded connection, another fastening method can also be used. For example, a quick-release fastener with a clamping lever, a clamping clamp, or a tension spring is also possible.

[0091] The same connection can be used for the second electrodes 4, which are stacked 22 on top of each other in the stacking direction.

[0092] The pouch cell arrangement 20 also includes a printed circuit board system 31 with at least one printed circuit board 32, which is electrically connected to the first electrodes 2a, 2b via the conductive spacer 24 between the first and second electrodes 2a, 2b. For example, the printed circuit board 32 has at least one conductor 34 that is connected to the conductive spacer 24. The at least one conductor 34 can be connected to a physically separate battery management system (not shown).

[0093] The circuit board 32 can have at least one electronic component 36. In another embodiment, however, the circuit board 32 can also have only conductor tracks such as conductor track 34, which are connected to electronic components located elsewhere. Such components can, for example, be housed in the battery management system.

[0094] For example, the printed circuit board 32 can have an electronic component 36 in the form of a temperature sensor 38. In one embodiment, each of the pouch cells 1a, 1b can be assigned its own, in particular a different, temperature sensor 38. The temperature of at least one pouch cell 1a, 1b can be monitored by means of the at least one temperature sensor 38. In one embodiment (not shown), two temperature sensors 38 can be arranged, one of which is configured to detect the temperature of pouch cell 1a, and the other temperature sensor is configured to detect the temperature of the second pouch cell 1b. In another embodiment (not shown), the temperature sensor can be directly connected to the printed circuit board and, in particular, the sensitive areas of the sensor can be spatially spaced away from the printed circuit board, especially in the direction of the pouch cell.

[0095] The pouch cell arrangement 20, in particular the circuit board 32, can have a thermal bridge 40 that is in contact with the spacer 24 or with at least one of the electrodes 2, 4. The thermal bridge 40 can be formed by an electrical contact and / or the at least one conductor track 34.

[0096] The circuit board 32 can further comprise at least one current sensor 42 as an electronic component 32, which is configured to detect the voltage and / or current generated by the pouch cell arrangement 20. The current sensor 42 can be connected to the conductive spacer via the at least one conductor 34.

[0097] For connection to, for example, the battery management system, the circuit board can be provided with a connector (“header”) 44. The contacts of the connector 44 are connected to the at least one conductor track 34 and / or the at least one electrical component 36. In one embodiment, the connector 44 serves (exclusively) for transmitting signals that are received and processed by the battery management system, for example, a computer or an integrated circuit. For example, the outputs of the electronic components 36, such as the at least one temperature sensor 38 and / or the at least one current sensor 42, can be connected to one or more contacts of the connector 44, so that the signals supplied by the at least one temperature sensor 34 and / or current sensor 38 can be accessed at the connector 44.The pouch cell arrangement 20 can be configured, in particular, to be connected to a bus system, for example a CAN bus or another system, by means of the connector 44. A corresponding component for coupling the at least one electronic component 32 to the bus system can be arranged on the circuit board 32.

[0098] If no bus system is used, each electronic component 32 or each conductor track 34 on the circuit board 44 can be connected to a different contact of the connector 44. This is necessary, for example, if the signals of the electronic components 36 are transmitted purely analogously.

[0099] If the spacer 24 between the two second electrodes 4a, 4b is conductive, the same arrangement with a further circuit board 32 of the circuit board system 31 can be located there as shown and described in Fig. 4 in connection with the first electrodes 2a, 2b.

[0100] Fig. 5 shows a modification of the pouch cell arrangement 20 of Fig. 4, whereby only the differences to the pouch cell arrangement 20 of Fig. 4 are discussed below. For further details, please refer to the explanations above regarding Fig. 4.

[0101] In Fig. 5, the clamping system 26 does not have two retaining bolts 28, but only one retaining bolt 28. The retaining bolt 28 does not penetrate the electrodes 2, 4, but extends in the stacking direction 22 transversely to the stacking direction 22 next to the electrode pair 2a, 2b and / or the electrode pair 4a, 4b. If the two electrode pairs 2a, 2b and 4a, 4b are located on the same narrow side 12 as in Figs. 1 and 2, the retaining bolt 28 can also be located, in particular, centrally between the two electrode pairs 2a, 2b and 4a, 4b. In such a configuration, it is not necessary for the electrodes 2, 4 to have a recess 17.

[0102] To distribute the force generated by the clamping system 26 evenly, the pouch cell arrangement 20 can have two punch plates 46, between which at least one of the two electrode pairs 2a, 2b or 4a, 4b, together with the spacer between them, is located. The punch plates 46 can be made of a non-conductive material and / or be galvanically isolated from the electrodes 2, 4. The circuit board 32 can be attached to the conductive spacer 24, 24a by a fastening element 47, for example, a rivet or a screw. There is no circuit board 32 on the non-conductive spacer 24, 24b.

[0103] In a modification of the embodiment shown in Fig. 5, two retaining bolts 28 can be provided, between which at least one of the two electrode pairs 2a, 2b or 4a, 4b is located in the direction transverse to the stack direction 22.

[0104] Fig. 6 shows a pouch cell arrangement 20 with a differently designed clamping system 26, focusing only on the differences from the configurations described above.

[0105] In Fig. 6, the clamping system 26 has one or more retaining clips 47, each of which grips a pair of electrodes 2a, 2b or 4a, 4b together with the spacer 24, 24a, 24b between them and presses them together in the stacking direction 22. Between a retaining clip 47 and the respective electrode stack 48, consisting of electrodes 2, 4 stacked one above the other in the stacking direction with the spacers between them, two stamping plates 46 can also be arranged, as in Fig. 5 (not shown in Fig. 6).

[0106] Finally, the circuit board 32 can be electrically connected to a conductive spacer 24a via a plug connection 49.

[0107] In Figures 4 to 6, the pouch sections 6 of the pouch cells 1a and 1b do not necessarily have to be stacked on top of each other in the stacking direction 22. Rather, it is sufficient if only the electrodes 2, 4 are stacked on top of each other in the stacking direction 22. This can also be ensured if the pouch sections 6 are opposite each other in the longitudinal direction 19.

[0108] Figure 7 shows a modification of a pouch cell arrangement 20 in which the first electrode 2 of a pouch cell 1 is arranged longitudinally 19 opposite the respective second electrode 4. As can be seen, the structure does not differ from the structures of the embodiments shown in Figures 4 to 6, so reference can be made to the descriptions therein. The only difference is that the two electrode stacks 48 are physically separated by the pouch section and are not located next to each other as in Figures 4 to 6. Thus, the clamping system 26 also has two spatially separate parts, with each part clamping a different pair of electrodes 2a, 2b or 4a, 4b, respectively.

[0109] In Fig. 7, washers are used as stamp plates 46. The pouch cell arrangements 20 of Figs. 4 to 7 form the basis for the construction of battery packs 50, which are explained below by way of example with reference to Figs. 8 and 9.

[0110] In a battery pack 50, several pouch cell assemblies 20 are stacked one above the other in the stacking direction 22. The pouch cells 1 can form one stack, two stacks, or more stacks. If the pouch cells 1 form only one stack, then, for example, the pouch sections 6 of all pouch cells 1 in a stack lie one above the other in the stacking direction 22. This is particularly possible if the two electrodes 2, 4 are located on the same narrow side, as in the embodiment shown in Fig. 1. If the two electrodes 2, 4 are located on narrow sides 12 opposite each other in the longitudinal direction 19, as in Fig. 2, then the pouch cells 1 of a battery pack 50 can be arranged in one, two, or three cell stacks.

[0111] In a cell stack 51, the side walls 16 of the pouch areas 6 of the pouch cells 1a or 1b, which are stacked 22 above each other in the stacking direction, can lie directly on top of each other. In this way, each stack has a defined height.

[0112] The number and configuration of the pouch cell assemblies 20 in the battery pack 50 depend on the application. However, the battery pack 50 should contain at least two pouch cell assemblies 20.

[0113] Particularly in a series connection of pouch cells 1, the pouch cell arrangements 20 stacked one above the other in the stacking direction 22 can be nested within each other. A second pouch cell 1b of a first pouch cell arrangement 20, 20a can thus be the first pouch cell 1a of the second pouch cell arrangement 20, 20b immediately following in the stacking direction 22.

[0114] Figure 8 shows a battery pack 50 composed of several pouch cell arrangements 20 stacked one above the other in the stacking direction 22. The electrodes 2, 4 are held together by a clamping system 26 in one of the embodiments described above. In Figure 8, the clamping system 26 of Figure 5 is shown only as a representative example of the other embodiments. In the battery pack 50, the clamping system 26 exclusively holds together at least one electrode stack 48 consisting of electrodes 2, 4 stacked one above the other in the stacking direction 22. The clamping system 26 does not act on the pouch sections 6 stacked one above the other in the stacking direction 22.

[0115] In a series connection of pouch cells 1, in the stacking direction 22 in each electrode stack 48 a conductive spacer 24a of any first pouch cell arrangement 1a is followed by a non-conductive spacer 24b of the second pouch cell arrangement 20b immediately following in the stacking direction 22.

[0116] The pouch cell arrangements 20a and 20b are nested within each other. The second pouch cell 1b of the first pouch cell arrangement 20a is simultaneously the first pouch cell arrangement 1a of the second pouch cell arrangement 20b. The electrodes 2, 4 exchange their roles, assuming that the first electrodes 2 are the immediately successive electrodes in the stacking direction that are electrically connected to each other via a conductive spacer 24a. This means that, in the configuration shown in Fig. 8, the first electrode 2b of the second pouch cell 1b of the first pouch cell arrangement 20a becomes the second electrode 4a of the first pouch cell 1a of the second pouch cell arrangement 20b. Similarly, the second electrode 4b of the second pouch cell 1b of the first pouch cell arrangement 20a becomes the first electrode 2a of the first pouch cell 1a of the second pouch cell arrangement 20b.

[0117] In a parallel connection of the pouch cells 1 of a battery pack 50 (not shown here), a conductive spacer is located between all electrodes 2, 4 of an electrode stack 48, so that there is no longer any difference between the first and second electrodes 2, 4 with regard to their connection.

[0118] As described in Fig. 4, each conductive spacer 24a of an electrode stack 48 is connected to a printed circuit board 32. Thus, a common printed circuit board 32 can be provided for the two electrode stacks 48 of Fig. 8, which is connected to the conductive spacers 24a of both electrode stacks 48. However, a separate printed circuit board 32 can also be provided for each electrode stack 48. The latter variant is shown in Fig. 8. In both cases, the at least one printed circuit board 32 extends in the stack direction 22 alongside the electrode stacks 48. For details regarding the design of the printed circuit boards 32, please refer to the above descriptions.

[0119] To provide stability to the electrode stacks 48, the non-conductive spacers 24b of an electrode stack 48 can be mechanically connected to the circuit board 32 associated with this electrode stack 48 by means of fastening means 52, for example screws, clips or rivets.

[0120] Each of the topmost and bottommost electrodes 2a and 2b in the stacking direction 22 can be electrically connected to a busbar 53 in order to tap off the power generated by the battery pack 50. The busbars 53 can be pressed against the topmost and bottommost electrodes 2a and 2b in the stacking direction 22 by the clamping device 26.

[0121] Figure 9 shows a battery pack 50 composed of pouch cells 1 with electrodes 2, 4 arranged longitudinally 19 on opposite narrow sides 12. Here too, consecutive pouch cell arrangements 20a, 20b are nested within one another in the stacking direction, as described in Figure 8. Any configuration of a clamping system 26 can be used here as well.

[0122] The circuit board 32 can be arranged in the longitudinal direction 19 or in the width direction 18 next to an electrode stack 48, as shown in Figs. 10 to 12.

[0123] In Fig. 10, the circuit board 32 is arranged longitudinally 19 next to an electrode stack 48 of a battery pack 50, which is only indicated here. The electrode stack 48 is located longitudinally 19 between the circuit board 32 and the pouch sections 6 of the pouch cells 1 of the battery pack 50. The circuit board 32, or rather its plane, extends in the stacking direction 22.

[0124] In this embodiment, both electrode stacks 48 of a cell stack 51 can be connected to the same circuit board 32, as described above. Alternatively, at least one electrode stack 48' of a battery pack 50' located opposite the electrode stack 48 in the longitudinal direction 19 can be connected to the circuit board 32, which is then situated between two battery packs 50 and 50'.

[0125] In Figures 11 and 12, the circuit board 32 is arranged in the width direction 18 next to an electrode stack 48 of a battery pack 50. The circuit board 32, or rather its plane, extends in the stack direction 22. The circuit board 32 can be arranged (Figure 11) such that both electrode stacks 48 of a battery pack 50 are located on one side of the circuit board. In this case, a separate circuit board 32 may be required for each electrode stack of the battery pack 50. However, the circuit board 32 can also be arranged between the two electrode stacks 48 (Figure 12). In this case, the circuit board 32 can also extend between the two electrode stacks 48' of a battery pack 50' opposite each other in the longitudinal direction 19. Again, in this case, all electrode stacks 48, 48' of the two battery packs 50, 50' can be connected to the circuit board 32.

[0126] Figures 13 and 14 show a battery pack 50 in which the pouch cells 1 are mechanically and electrically connected to each other in pairs by only one conductive spacer 24, 24a, and to the pouch cell 1 immediately following in the stacking direction 22. Thus, in each pouch cell arrangement 20, only the first electrode 2a of the first pouch cell 1a is mechanically and electrically connected to the first electrode 2b of the second pouch cell 1b. The second electrodes 4 of a pouch cell arrangement 20 are not connected to each other; however, they form the first electrodes 2 of the two pouch cell arrangements immediately preceding and following it in the stacking direction 22. A wall 54 of a housing 56, in which the battery pack 50 is contained, can project between the unconnected second electrodes 4.The housing 56 can also consist of several parts and be made at least partially of non-conductive material to achieve an electrically insulating function.

[0127] Otherwise, in the design of Figs. 13 and 14, the nesting of the pouch cell arrangements 20 already described above is found, in which a pouch cell 1 is the second pouch cell 1b of the pouch cell arrangement 20a and the first pouch cell 1b of the pouch cell arrangement 20b immediately following in the stacking direction 22.

[0128] A busbar 58 can be attached to at least one of the uppermost and / or lowermost electrodes 2, 4 of the battery pack 50 in order to tap into the power provided by the battery pack 50.

[0129] Since the electrodes 2, 4 are located on opposite sides of the pouch cells 1 in the longitudinal direction 19 in the embodiment of Figs. 13 and 14, two circuit boards 32 are provided, one circuit board 32 on each of the opposite sides in the longitudinal direction 19.

[0130] The circuit boards 32 are screwed to the spacers 24, 24a. A temperature sensor 38 can be mounted far from the circuit board 32, on or near an electrode 2, 4. The signals from the temperature sensor 38 can be transmitted to the battery management system (not shown) via corresponding conductor tracks 34 and a terminal block 60. Instead of a terminal block 60, a connector, such as connector 44, can also be used.

[0131] Figures 15 and 16 show a housing 56 for holding several battery packs 50 (not shown). The housing 56 can be made of an extruded material, for example, aluminum or plastic. The housing 56 has a plurality, here four, of, for example, shaft-shaped battery pack receptacles 62, each designed to hold one battery pack 50. The battery packs 50 are inserted perpendicular to the stacking direction 22, for example, in the longitudinal direction 19 or in the lateral direction 18, into their respective battery pack receptacles 62. The individual battery pack receptacles 62 are separated from one another by webs or bulkheads 64 formed by the housing 56. The webs or bulkheads 64 are part of the extruded profile.

[0132] The housing 56 can have a polygonal, in particular rectangular, floor plan; the webs or bulkheads 64 can be arranged in a cross shape in the floor plan.

[0133] The stacking direction 22 of a battery pack can be perpendicular to a bulkhead or a web 64. In particular, the stacking direction 22 can point from an outer wall 66 of the housing 56 towards a bulkhead or web.

[0134] Fig. 16 shows the housing 56 of Fig. 15 with battery packs 50 inserted into the battery pack receptacles 62. The circuit boards 32 with their terminal blocks 60 or alternatively or cumulatively plugs 44 (not shown) are accessible through a housing opening 68.

[0135] The housing 56 has in particular a stacking clamping device 70 for each battery pack 50, which is designed to press the pouch sections 6 of the pouch cells 1 of a cell stack against each other in the stacking direction 22.

[0136] The stacking clamping device 70 can, for example, be designed to press the bag sections 6 from an outer wall 66 of the housing 56 in the stacking direction 22 against a web or bulkhead 64.

[0137] The stacking clamping device 70 is preferably designed to be actuated from outside the housing 56. For this purpose, it can have clamping elements 72 accessible from outside the housing 56 in the form of screws, levers and / or springs. The clamping element can also be formed by an elastic material, particularly one cast in during manufacturing.

[0138] In one embodiment, the stacking clamping device 70 can have at least one pressure plate 74 for each battery pack 50 to be clamped. The pressure plate 74 is mounted between a battery pack 50 and the outer wall 66 and can be movably fixed against the pouch section 6 of the directly opposite pouch cell 1 by means of at least one clamping element 72. In this way, the cell stack 51 of a battery pack 50 can be easily clamped, but at the same time also easily released, in order to remove individual pouch cells 1 during maintenance or repair.

[0139] To prevent the pressure plate 74 from tilting, linear guide elements 76 can be provided on the housing 56 and / or the pressure plate 74, which are designed to guide the pressure plate 74 in a straight line along the stacking direction 22. The linear guide elements

[0140] 76 could be, for example, simple tongue and groove joints.

[0141] Reference sign

[0142] 1 pouch cell

[0143] 1a first pouch cell

[0144] 1b second pouch cell

[0145] 2 first electrode

[0146] 2a First electrode of the first pouch cell

[0147] 2b first electrode of the second pouch cell

[0148] 4 second electrode

[0149] 4a second electrode of the first pouch cell

[0150] 4b second electrode of the second pouch cell

[0151] 6 bag section

[0152] Slide 8

[0153] 10 Flat side of the bag section

[0154] 12 Narrow side of the bag section

[0155] 14 Flat side of the electrode

[0156] 16 Side wall of the bag section

[0157] 17 recess

[0158] 18 Latitude

[0159] 19 Longitudinal direction

[0160] 20 pouch cell arrangement

[0161] 20a first pouch cell arrangement

[0162] 20b second pouch cell arrangement

[0163] 22 Stacking direction

[0164] 24 spacer

[0165] 24a conductive spacer

[0166] 24b non-conductive spacer

[0167] 26 clamping system

[0168] 28 retaining bolts

[0169] 30 Head section

[0170] 31 Printed circuit board arrangement

[0171] 32 circuit boards

[0172] 34 conductor track

[0173] 36 electronic component

[0174] 38 Temperature sensor 40 W heat bridge

[0175] 42 Current sensor

[0176] 44 plugs

[0177] 46 stamp plates

[0178] 47 Retaining clip

[0179] 48, 48' Electrode stack

[0180] 49 Plug connection

[0181] 50, 50' battery pack

[0182] 51 cell stacks

[0183] 52 Fasteners

[0184] 53 busbar

[0185] 54 Wall

[0186] 56 cases

[0187] 58 busbar

[0188] 60 Terminal block

[0189] 62 Battery pack mount

[0190] 64 piers / bulkheads

[0191] 66 Exterior wall

[0192] 68 Case opening

[0193] 70 Stack clamping device

[0194] 72 clamping element

[0195] 74 Pressure plate

[0196] 76 Linear guide element

Claims

1. Claims 1. Pouch cell arrangement (20) comprising a first pouch cell (1a) having a first electrode (2a) and a second electrode (4a), comprising a second pouch cell (1b) having a first electrode (2b) and a second electrode (4b), wherein the first electrode (2a) of the first pouch cell (1a) is located in a stacking direction (22) above the first electrode (2b) of the second pouch cell (1b), comprising a spacer (24, 24a) located between the first electrode (2a) of the first pouch cell (1a) and the first electrode (2b) of the second pouch cell (1b); wherein the spacer (47a) electrically connects the first electrode (2a) of the first pouch cell (1a) to the first electrode (2a) of the second pouch cell (1b);with a printed circuit board arrangement (31) comprising a printed circuit board (32) arranged transversely to the stacking direction (22) next to the spacer (24, 24a) and extending parallel to the stacking direction (22), wherein the printed circuit board (32) is electrically connected to the first electrode (2a) of the first pouch cell (1a) and / or the first electrode (2b) of the second pouch cell (1b); and with a clamping system (5) configured to generate a force pressing the first electrode (2a) of the first pouch cell (1a), the spacer (47a) and the first electrode (2b) of the second pouch cell (1b) towards each other.

2. Pouch cell arrangement (20) according to claim 1, wherein the second electrode (4a) of the first pouch cell (1a) is located in a stacking direction (22) above the second electrode (4b) of the second pouch cell (1b), with a further, second, spacer (24, 24b) located between the second electrode (4a) of the first pouch cell (1a) and the second electrode (4b) of the second pouch cell (1b); 3. Pouch cell arrangement (20) according to claim 2, wherein the second spacer either electrically connects or galvanically isolates the second electrode (4a) of the first pouch cell (1a) and the second electrode (4b) of the second pouch cell (1b).

4. Pouch cell arrangement (20) according to claim 3, wherein the second spacer electrically connects the second electrode (4a) of the first pouch cell (1a) and the second electrode (4b) of the second pouch cell (1b); and wherein the circuit board arrangement (31) has a circuit board (32) arranged transversely to the stack direction (22) next to the spacer (24, 24a) and extending parallel to the stack direction (22), which is electrically connected to the second electrode (4a) of the first pouch cell (1a) and / or the second electrode (4b) of the second pouch cell (1b).

5. Pouch cell arrangement (20) according to claim 4, wherein the circuit board (32) electrically connected to the second electrode (4a) of the first pouch cell (1a) and / or the second electrode (4b) of the second pouch cell (1b) and the circuit board (32) electrically connected to the first electrode (2a) of the first pouch cell (1a) and / or the first electrode (2b) of the second pouch cell (1b) are two separate circuit boards (32).

6. Pouch cell arrangement (20) according to any one of claims 1 to 5, wherein the first electrodes (2a, 2b) and the second electrodes (4a, 4b) of the first and second pouch cells (1a, 1b) are arranged on opposite sides or on the same side of the respective pouch cell (1a, 1b).

7. Pouch cell arrangement (20) according to one of claims 1 to 6, wherein the circuit board (32) has at least one conductor (34) which is electrically connected to the conductive spacer (24).

8. Pouch cell arrangement (20) according to claim 7, wherein the circuit board (32) comprises at least one electronic component (36).

9. Pouch cell arrangement (20) according to claim 8, wherein at least one electronic component (36) is configured as a temperature sensor (38), wherein the circuit board (32) has a thermal bridge (40) that connects the temperature sensor (38) to the first pouch cell (1a) and / or the second pouch cell (1b).

10. Pouch cell arrangement (20) according to one of claims 1 to 9, wherein the clamping system (26) has two stamp plates (46) between which the first electrodes (2a, 2b) and / or the second electrodes (4a, 4b) are located in the stacking direction (22).

11. Pouch cell arrangement (20) according to one of claims 1 to 10, wherein the clamping system (26) has at least one retaining bolt (28) extending in the stacking direction (22).

12. Battery pack (50), in particular for light vehicles, comprising a plurality of pouch cell arrangements (20) arranged one above the other in the stacking direction (22), wherein each of the pouch cell arrangements (20) is configured according to one of claims 1 to 11, and the first and second electrodes (2, 4) of the pouch cell arrangements (20) are arranged one above the other in two electrode stacks (48) in the stacking direction (22), wherein spacers (24) are arranged between the electrodes (2, 4) in the two electrode stacks (48).

13. Battery pack (50) according to claim 12, wherein the two electrode stacks (48) are clamped by the clamping system (26) in the stacking direction (22).

14. Battery pack (50) according to claim 12 or 13, wherein the circuit board (32) is electrically connected to at least one of the two electrode stacks (48) by means of the conductive spacers (24).

15. Battery pack (50) according to one of claims 12 to 14, wherein the circuit board (32) extends in the stacking direction (24) over the height of the electrode stack (48).

16. Battery pack according to one of claims 12 to 15, wherein the plurality of pouch cell arrangements (20) comprises a first pouch cell arrangement (20a) and a second pouch cell arrangement (20b); wherein the second pouch cell arrangement (20b) immediately follows the first pouch cell arrangement (20a) in the stacking direction (22); and wherein the second pouch cell (1b) of the first pouch cell arrangement (20a) is simultaneously the first pouch cell (1a) of the second pouch cell arrangement (20b).

17. Housing (56) for at least one battery pack (50) according to one of claims 12 to 16, comprising at least one battery pack receptacle (62) configured to receive a battery pack (50); and comprising a stacking clamping device (70) configured to compress the pouch sections (6) of the pouch cells (1) arranged in a battery pack receptacle (62) in the stacking direction (22).

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