Housing device for soft-pack battery pack, battery module, and vehicle

Abstract

The invention relates to a housing device for a soft pack battery, which has a sealing joint strip on the peripheral side and a discharge electrode protrusion protruding from the sealing joint strip, wherein the housing device is configured in a frame shape and comprises: an outer frame; and an inner frame; wherein the inner frame is arranged within the outer frame such that a sealing joint strip accommodation cavity is configured between the outer frame and the inner frame, in which the sealing joint strip of the soft pack battery can be arranged in particular flexurally.

Description

Technical Field

[0001] The present invention relates to a accommodating device for a soft-pack battery pack, a battery module and a vehicle. Background Art

[0002] Batteries in vehicle drives change their volume during charging or discharging and / or due to aging during their service life. In addition, the operating characteristics of lithium-ion pouch cells are highly dependent on external conditions due to their low mechanical stability.

[0003] Therefore, the pressure applied to the pouch battery pack from the outside is a decisive factor for the performance, service life, and structural stability of a battery module including a plurality of pouch battery packs.

[0004] A technical challenge when using solid-state batteries, such as lithium-ion pouch cells, is achieving a volume change in the anode. Lithium ions are stored in the anode's porous layer during charging and migrate out again during discharge. This can result in a volume change of approximately 30% between the charged and discharged states of the pouch cell.

[0005] In battery modules where individual pouch battery packs are combined, the combined pouch battery packs must be able to achieve a travel path of up to several millimeters. This path is always larger when more than one battery pack is stacked together in a pouch format or similar. This means that the further a battery pack is from the (rear) wall of the battery housing (in the battery stacking direction), the greater its travel path.

[0006] Therefore, it is important to ensure that the pouch cell is free to move in the direction of volume expansion and, if necessary, can follow the compression plate, while the position and orientation of the pouch cell remains unchanged in all other directions (i.e., without movement, warping, tilting, etc.). Furthermore, the pouch cell should be loaded with pressure independently of its movement in order to reduce or even avoid dendrite formation and / or growth. Therefore, a uniform pressure load over the entire cell surface is essential for the performance and life of the pouch cell. This requires a deformation-related design of the components involved in the battery module.

[0007] In current soft pack battery packs with liquid electrolyte, the volume expands due to aging effects. In order to be able to compensate this aging-related volume expansion and to avoid a significant deformation of the battery housing, passive pressure pads, tension belts and / or springs are used in order to absorb or compensate the volume expansion. It is thus ensured that the individual battery stacks cannot move freely (back and forth) in the housing at any time. Thereby, the risk of damage to the battery pack or the battery stacks can be reduced. However, with these systems only comparatively small volume changes of less than 10% can be compensated. Furthermore, these systems are not suitable for enabling a movement of the soft pack battery pack which is significantly greater than the thickness of the battery pack.

[0008] It is furthermore noted that the sealing joint of the soft pack battery pack is not damaged, for example, due to a movement of the soft pack battery pack, since otherwise a fluid connection between the interior of the soft pack battery pack and its environment would result. Thereby, the electrolyte can diffuse out of the soft pack battery pack or oxygen can enter the interior of the soft pack battery pack, wherein both cases can lead to a reduction of the service life.

[0009] It is known from document DE 10 2010 051 010 A1 that at least a portion of the sealing joint of the battery cell embodied as a soft pack battery pack can be provided with a frame, which achieves a connection with the sealing joint, a thermally conductive element arranged in the region of the portion of the sealing joint and / or other regions of the battery cell by a form-fit connection, a force-fit connection and / or an adhesive connection. Thus, a frame, for example, composed of plastic, is provided, which is fixedly connected with the battery cell and / or the thermally conductive element by an adhesive and a well thermally conductive casting and provides a sufficient thermal conductivity and rigidity of the battery pack in operation. SUMMARY

[0010] The technical problem addressed by the present application is to provide an improved housing device for a soft pack battery pack, an improved battery module and an improved vehicle.

[0011] The technical problem is solved according to the present application by a housing device, a battery module and a vehicle.

[0012] Further advantageous design options of the present application are obtained from the subsequent description of preferred embodiments of the present application.

[0013] A first aspect of the present application relates to a housing device for a soft pack battery pack, the housing device having a sealing joint on a peripheral side and a discharge electrode protrusion protruding from the sealing joint, wherein the housing device is configured frame-shaped and comprises:

[0014] an outer frame; and

[0015] an inner frame;

[0016] The inner frame is arranged inside the outer frame, so that a sealing strip accommodating cavity is constructed between the outer frame and the inner frame, and the sealing strip of the soft-pack battery pack can be arranged in the sealing strip accommodating cavity in a particularly curved manner.

[0017] The pouch battery comprises a layer stack comprising a plurality of layers of electrode material and separator material, which is surrounded in an outer cover (wrapping film), for example, by a composite film with an optional aluminum liner. The sides of the outer cover are typically thermally welded to form a sealing seam or sealing seam that surrounds and seals the layer stack. The sealing seam is thus present on the periphery of the pouch battery.

[0018] Furthermore, the pouch cell has two discharger projections, which are electrically conductively connected to the layer stack. Depending on the embodiment, the discharger projections can be arranged on one side or on opposite sides of the pouch cell.

[0019] The frame-shaped receiving device is configured to enclose the pouch cell pack at its outer circumference. The frame shape of the receiving device substantially corresponds to the peripheral shape of the sealing strip of the pouch cell pack. Furthermore, the receiving device is configured such that the pouch cell pack enclosed therein can undergo a volume change due to the charging and discharging processes.

[0020] In this case, the volume change occurs in the region of the layer stack of the pouch cell and in the layer stacking direction, ie, in a direction perpendicular to the layer stack.

[0021] The receiving device comprises an outer frame and an inner frame and is therefore constructed in two parts. The receiving device may, for example, comprise a receiving section for receiving the inner frame. To this end, the receiving section may extend on the peripheral side, on the outer frame. "Peripheral side" refers to the edge area of ​​the outer frame. The receiving section can receive the inner frame so that the inner frame is arranged in the outer frame. Here, the edge area may comprise the outer peripheral side of the outer frame, as well as a peripheral area including the frame when viewed in the front direction of the outer frame. The front direction is perpendicular to the frame plane of the receiving device (hereinafter referred to as the "frame plane"). When the soft-pack battery pack is enclosed in the receiving device, the frame plane is arranged parallel to the layers formed by the stack of layers of the soft-pack battery pack and perpendicular to the stacking direction.

[0022] The inner frame and the outer frame can be connected to each other by force-fitting, form-fitting and / or material-fitting connection. For example, latching projections, pasting, riveting, screwing, etc. can be selectively set for this reason.

[0023] The inner frame is arranged in the outer frame so that a sealing joint strip accommodating cavity is formed between them. The sealing joint strip of the soft-pack battery pack can be arranged in the sealing joint strip accommodating cavity. The sealing joint strip accommodating cavity is arranged between the surface of the outer frame facing the inner frame and the surface of the inner frame facing the outer frame. The sealing joint strip accommodating cavity can therefore basically extend along the accommodating section. For example, the sealing joint strip accommodating cavity can be arranged between the inner peripheral side of the outer frame and the outer peripheral side of the inner frame. The sealing joint strip accommodating cavity extends along the accommodating device on the peripheral side. Therefore, the accommodating device can surround the soft-pack battery pack on the periphery of the soft-pack battery pack by arranging the sealing joint strip in the sealing joint strip accommodating cavity.

[0024] By means of the sealing strip accommodating cavity, the sealing strip can be arranged in a protected manner in the accommodating device, thereby avoiding damage to the sealing strip. Thus, for example, it is possible to prevent the sealing strip from rubbing against other components of the battery module (such as the housing, other battery packs, etc.) due to the movement of the soft-pack battery pack. In addition, conventionally manufactured soft-pack battery packs with sealing strips can be installed in the battery module with the aid of the accommodating device. In addition, it is also possible to avoid the sealing strip being fixed to the accommodating device by material-matched connections, such as gluing and / or screwing, riveting, etc. As a result, the sealing strip (and therefore also the soft-pack battery pack) can be enclosed in the accommodating device in a particularly damage-free and detachable manner.

[0025] In addition, the sealing strip receiving cavity also accommodates an area of ​​the sealing strip, from which the discharger protrusion is guided out from the soft-pack battery pack or the outer film. This prevents the outer film from rubbing against the battery module housing on the inside. It is thus possible to prevent the outer film in the area of ​​the discharger protrusion from being worn away, which in the worst case could lead to undesirable conductive contact between the discharger protrusion and the aluminum material used in the outer film. This creates unfavorable insulation conditions on the outer film, which contribute to electrical breakdown. Therefore, the receiving device can continuously ensure good insulation properties of the outer film and improve the breakdown strength of the soft-pack battery pack because the outer film does not wear on the battery module housing when the soft-pack battery pack moves.

[0026] Furthermore, the sealing strip can be arranged in a curved manner in the sealing strip receiving cavity, for example. Here, "curved" means that the sealing strip is placed / guided in the sealing strip receiving cavity at a radius, and (when viewed along the circumference of the receiving device) the radius is provided in the sealing strip receiving cavity on the outer frame and / or the inner frame. To this end, the sealing strip receiving cavity or the cross-section of the sealing strip receiving cavity, when viewed along the circumference of the receiving device, comprises a first cavity section and a second cavity section. The first cavity section extends parallel to the frame plane and along the neutral axis of the soft-pack battery pack. In other words, when the soft-pack battery pack is enclosed in the receiving device, the sealing strip is arranged in the first cavity section without bending or curvature. The "neutral axis" is a plane of the soft-pack battery pack in which the discharger protrusion is located. The second cavity section is adjacent to the first cavity section and, when viewed along the circumference of the receiving device, forms an angle with the first cavity section. In some examples, the angle can be between 80 and 100 degrees, for example, substantially 90 degrees. The angle or bending radius in the sealing strip receiving cavity depends on the material used for the outer film and its deformability. The sealing strip can be arranged in a curved manner in the sealing strip accommodating cavity, and the accommodating device can be designed to be relatively short in the transverse direction. Here, the transverse direction is located in the frame plane and describes the direction from the center of the accommodating device toward the periphery. Through this design of the sealing strip accommodating cavity, the accommodating device can be designed to save space and weight. Therefore, the battery module can be designed to save space and weight, and the battery module includes a plurality of accommodating devices with enclosed soft-pack battery packs. Alternatively, the volumetric efficiency of the battery module can be improved in the same battery module size, because based on the space-saving design of the accommodating device, more accommodating devices (with enclosed soft-pack battery packs) can be installed in the battery module (housing).

[0027] In another embodiment, the outer frame and the inner frame can be constructed so that the sealing strip can be at least partially clamped between the outer frame and the inner frame. "Can be clamped" means that the outer frame and the inner frame can apply a force fit to the sealing strip, and the force fit at least partially prevents the movement of the sealing strip. For example, the first cavity section can be constructed so that a force fit is applied to the sealing strip. In this way, the fixation of the soft-pack battery pack on the container can be improved.

[0028] Typically, the soft-pack battery pack is constructed in a rectangular shape, and the container device is correspondingly constructed in a rectangular shape. Unlike some embodiments in which the sealing strip accommodating cavity extends completely along the periphery of the container device, there are embodiments in which the sealing strip accommodating cavity can be left empty or removed to accommodate the folded portion in the corner area of ​​the sealing strip formed by bending the sealing strip. This means that the sealing strip accommodating cavity in the corner area of ​​the container device is at least a partially open recess. Therefore, the corner area of ​​the container device can be at least partially left empty or cut off, so that the corner area of ​​the soft-pack battery pack and the bent sealing strip and its folded portion can be accommodated and / or at least partially protected in the container device. The corner area is an area on the corner of the rectangular container device when viewed from the front direction toward the container device. Thus, by bending the sealing strip in the corner area of ​​the container device, a folded portion on the side of the sealing strip can be formed, and the stress load of the sealing strip on its corner area can be at least partially reduced.

[0029] In some embodiments, the receiving device further comprises a latching connection for releasably connecting the outer frame to the inner frame. The releasable connection can, for example, be configured as a force-fitting connection, such as a screw connection, and / or a form-fitting connection, such as a latching / snapping / clamping connection. Here, the outer frame can in particular comprise a latching projection for latching the inner frame to the outer frame. To this end, the latching projection can be configured to be elastically deformable. The latching projection can extend at least partially or completely along the outer frame or the receiving section. Due to the releasable connection between the outer frame and the inner frame, the soft-pack battery pack enclosed in the receiving device can be replaced particularly simply and without damaging the receiving device.

[0030] In an alternative embodiment, the outer frame and the inner frame can be connected to each other by means of the aforementioned latching connection for quick installation and locking. Additionally, the outer frame and the inner frame can be connected to each other by means of an additional force-fitting, material-fitting, and / or form-fitting connection to achieve a particularly stable connection between the outer frame and the inner frame. For example, the additional connection can include adhesive bonding, welding, and / or threaded connections.

[0031] In another embodiment, at least one of the outer frame and the inner frame may have an outwardly pointing slope on the inner peripheral side. "Inner peripheral side" refers to the side or surface of the outer frame or inner frame that extends along the inner periphery of the outer frame or inner frame. The slope of the inner peripheral side points outward, that is, the slope of the inner peripheral side is arranged on the outer edge of the inner peripheral side of the outer frame or inner frame. In addition, the slope of the inner peripheral side may extend (circumferentially) along the entire periphery of the outer frame or inner frame. When the soft-pack battery pack is discharged and therefore shrinks in the stacking direction, the slope of the inner peripheral side is utilized to at least partially avoid warping of the outer cover of the soft-pack battery pack and the outer edge of the outer frame or inner frame.

[0032] In some embodiments, the accommodating device may further have a slope on the outer peripheral side. In other words, the slope of the outer peripheral side is provided on the outer edge of the outer peripheral side of the accommodating device. Therefore, the slope of the outer peripheral side may be provided on the outer frame. In addition, the side edge of the outer peripheral side may extend (in the circumferential direction) along the entire periphery of the accommodating device. When the soft-pack battery pack is charged or discharged, and thus expands or contracts in the stacking direction, the slope of the inner peripheral side is utilized to at least partially avoid warping of the accommodating device on the battery module housing or its components, and to reduce the friction of the accommodating device on the battery module housing.

[0033] In another embodiment, the receiving device may further include sliding sections on the outer periphery, so that the receiving device can be arranged to slide against the inner wall of the battery module housing. "Outer periphery" refers to the side or surface of the outer or inner frame that extends along the outer periphery of the outer or inner frame. The sliding sections may be arranged on each outer side of the frame-shaped receiving device.

[0034] The sliding section can, for example, have a surface structure with favorable sliding properties, be loaded with lubricant, and / or include a lubricant reservoir. The sliding section can at least partially reduce the stick-slip effect (i.e., the slipping of bodies moving relative to one another) of the receiving device in the battery module housing. Furthermore, the sliding / friction surfaces between the receiving device and the battery module housing or its components can be optimized.

[0035] In other embodiments, the sliding section can include two sliding projections in the region of the arrester projection, between which a centering mechanism for a contact plate for contacting one of the multiple arrester projections can be arranged. The sliding projection can be designed so that it provides structural space for the centering mechanism and the contact plate, wherein the centering mechanism, including the contact plate secured to the centering mechanism and the electrical conductor connected to the contact plate, does not protrude beyond the sliding projection (as viewed from the center of the receiving device toward the frame side of the receiving device). This ensures that, in the region where the pouch cell contacts the electrical conductor, only the sliding projection is in sliding, insulated contact with the battery module housing, thereby ensuring a separate, insulated structural space for electrical contacting of the pouch cell.

[0036] A second aspect of the present invention relates to a battery module. The battery module comprises:

[0037] battery module housing;

[0038] The plurality of receiving devices according to one of the preceding embodiments, wherein the plurality of receiving devices are arranged sequentially along a direction perpendicular to a frame plane of the receiving devices;

[0039] a plurality of soft-pack battery packs, each of the soft-pack battery packs being enclosed in one of the plurality of receiving devices; and

[0040] A pressure loading device designed to apply pressure to a plurality of pouch battery packs.

[0041] The plurality of receiving devices are arranged such that the plurality of soft pack battery groups have a common (battery) stacking direction. The plurality of soft pack battery groups are arranged into a battery stack.

[0042] The pressure-applying device is constructed and designed to apply a predetermined (compressive) prestress to the battery stack in the stacking direction and to maintain this prestress during the volume change of the soft-pack battery pack. For example, the predetermined prestress can be related to the charge and / or discharge state of the soft-pack battery pack. To this end, the pressure-applying device can, for example, have a plate that can move relative to the battery stack. Due to the volume change of the individual soft-pack battery packs during the charging or discharging phase, the soft-pack battery packs in the battery stack change their position. Therefore, the pressure plate must be redirected (nachführen) in order to achieve a constant prestress acting on the battery stack.

[0043] The pouch cell is protected along its sealing seam by being enclosed in a corresponding receiving device, while the receiving device simultaneously enables a guided movement of the pouch cell within the battery module housing.

[0044] According to one embodiment, the pressure-applying device may include a (hydraulic) force-generating element coupled to the plate and capable of moving the plate relative to the battery stack. In another embodiment, the pressure-applying device may include a transmission device, via which the force-generating element is coupled to the plate. The transmission device can transmit / modify the force generated by the force-generating element and direct it to the plate.

[0045] The uniform prestressing applied to the battery stack ensures the performance, service life, and structural stability of a plurality of pouch cells and thus of the battery module.

[0046] A third aspect of the present invention relates to a vehicle having one of the aforementioned battery modules. The vehicle may have an electrified drive train and include the battery module as a traction battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Embodiments of the present invention will now be described exemplarily and with reference to the accompanying drawings. In the drawings:

[0048] Figure 1 schematically illustrates a soft pack battery pack;

[0049] Figure 2a 、 2bSchematically illustrates a receiving device according to a first embodiment;

[0050] Figure 3a 、 3b Show the basis Figure 2a 、 2b A cross-sectional view of a receiving device;

[0051] Figures 4a-4f Shows the buttons according to different embodiments Figure 2a 、 2b Corner areas of the receiving device;

[0052] Figure 5 schematically illustrates a portion of a battery module;

[0053] Figure 6 A contact plate for receiving the device is shown;

[0054] Figures 7a-7c Schematically illustrating circuit connections of a plurality of soft-pack battery packs enclosed in a receiving device;

[0055] Figure 8a 、 8b Schematically shows the battery module and the meander-shaped course of the electrical conductor;

[0056] Figures 9a-9c Schematically shows the Figure 8a A partial top view and a cross-sectional view of a battery module;

[0057] Figure 10a 、 10b schematically illustrates a receiving device according to a second and a third embodiment; and

[0058] Figure 11 Schematically showing the Figure 8a A vehicle with a battery module. DETAILED DESCRIPTION

[0059] Figure 1A soft-pack battery pack 100 is schematically shown, which can be enclosed in a receiving device 1 described later. The soft-pack battery pack 100 comprises a layer stack 103, which is enclosed in an outer cover. The layer stack comprises a plurality of layers consisting of electrode material and separator material. The sides of the outer cover are thermally welded to form a sealing seam 105, which surrounds the layer stack 103. The sealing seam 105 is therefore present on the peripheral side of the soft-pack battery pack 100. The soft-pack battery pack 100 also comprises two discharger protrusions 107 for contacting the contact plate 40 described later. The soft-pack battery pack 100 has a layer stacking direction S, which extends perpendicular to the layer stack 103. During the discharge and charging process of the soft-pack battery pack 100, the volume of the soft-pack battery pack 100 in the region of the layer stack 103 changes. In this case, the soft-pack battery pack 100 expands during the charging process and contracts during the discharge process.

[0060] Figure 2a The container 1 according to the first embodiment is schematically shown, in which the soft pack battery 100 is enclosed. The container 1 is constructed in a frame shape and allows the volume of the soft pack battery 100 to change along the layer stacking direction S.

[0061] Figure 2b An exploded view of the receiving device 1 is schematically shown. The receiving device 1 comprises an outer frame 3 and an inner frame 20. The outer frame 3 includes a receiving section 5 that extends along the (inner) periphery of the receiving frame 3 and is configured to receive the inner frame 20. Furthermore, the outer frame 3 includes a plurality of latching sections or latching projections 7 for releasably connecting the outer frame 3 to the inner frame 20. On the sides of the arrester projection 107, the outer frame 3 includes two sliding sections on its outer periphery, each of which includes sliding projections 9.

[0062] Figure 3a A sectional view along the section line AA is shown, which shows a region of the receiving device 1 with an enclosed pouch cell 100, wherein the region is arranged opposite the discharger projection 107. The pouch cell 100 is shown in the discharged state, wherein the volume change of the pouch cell 100 due to the charged state is indicated by the dashed line.

[0063] The outer frame 3 and the inner frame 20 are arranged so that a sealing strip accommodating cavity 13 is formed between the outer frame 3 and the inner frame 20. The sealing strip 105 can be arranged in the sealing strip accommodating cavity 13. In other words, the sealing strip 105 can be accommodated / enclosed in the sealing strip accommodating cavity 13. Figure 3aIn the example shown, the sealing strip accommodating cavity 13 is constructed so that the sealing strip 105 can be arranged circumferentially in the sealing strip accommodating cavity 13. To this end, the sealing strip accommodating cavity 13 includes a first cavity segment 13a and a second cavity segment 13b extending along the neutral axis of the soft-pack battery pack 100 and parallel to the frame plane of the accommodating device 1. The second cavity segment connects the first cavity segment 13a and (as viewed along the circumference of the accommodating device 1) has a cavity cross-section. The second cavity segment 13b forms an angle of approximately 90° with the cavity cross-section of the first cavity segment 13a. Therefore, the sealing strip accommodating cavity 13 has a curved section 13c with a radius, around which the sealing strip 105 can be arranged.

[0064] In the region of the first chamber section 13 a , the outer frame 3 and the inner frame 20 may be configured such that the sealing joint strip 105 may be clamped between the outer frame 3 and the inner frame 20 by a clamping force exerted by the outer frame 3 and the inner frame 20 .

[0065] The receiving device 1 also includes a latching connection for releasably connecting the outer frame 3 to the inner frame 20. The latching connection includes a latching projection 7 on the outer frame side, which engages in a correspondingly configured latching section 27 on the inner frame side. The outer frame 3 and the inner frame 20 are formed from a material that allows elastic deformation of the latching projection 7 and the latching section 27 to achieve the latching connection. In some examples, the outer frame and the inner frame 20 can be formed from an elastic plastic material, such as polyamide 6 with a 30% glass fiber content (PA6-GF30).

[0066] also, Figure 3a The outer frame 3 is shown as having an inner peripheral slope 15 on its inner periphery, which is arranged on an outward-pointing edge. The inner frame 20 also has an inner peripheral slope 25 on its inner periphery, which is arranged on an outward-pointing edge. On its outer periphery, the outer frame 3 has a first outer peripheral slope 17a and a second outer peripheral slope 17b. Each slope 15, 17a, 17b, 25 extends along the entire periphery of the outer frame 3 and inner frame 20, and thus along the periphery of the receiving device 1.

[0067] Furthermore, a sliding section 16 is provided on the outer frame 3 , the sliding section extending at least partially along the outer periphery of the outer frame 3 .

[0068] Figure 3bA sectional view along the section line AA is shown, which shows a region of the receiving device 1 with the enclosed pouch battery 100, wherein this region is arranged in the discharger projection 107. In this region, the outer frame includes two centering means 11 for centering and thus for fixing / accommodating the contact plate 40, and a sliding section 9 designed as a sliding projection. The centering means 11 each include two centering projections 11a.

[0069] In addition, Figure 3b As can be seen in the figure, the sealing strip receiving cavity 13 is designed to be open so that the arrester projection 107 can be guided out of the receiving device 1. To this end, the outer frame 3 and the inner frame 20 are arranged so that a through-section 13d is formed between them, through which the arrester projection 107 can be guided (in a labyrinthine manner). The cross-section of the through-section 13d (as viewed along the circumference of the receiving device 1) extends essentially parallel to the cross-section of the first cavity section 13a. To form the through-section 13d, in the region of the arrester projection, the outer frame 3 includes an outer-frame projection 18, and the inner frame 20 includes an inner-frame projection 28, which protrude perpendicularly from the outer periphery of the outer frame 3 or inner frame 20, respectively. Furthermore, the outer-frame projection 18 and the inner-frame projection 28 facing the arrester projection 107 include an outer-frame radius 18a and an inner-frame radius 28a, respectively. The outer frame-side protrusion 18 and, therefore, the outer frame-side radius 18a protrude further than the inner frame-side protrusion 18 or the inner frame-side radius 28a. When the arrester protrusion 107 moves due to a change in the volume of the pouch battery, the outer frame-side radius 18a and the inner frame-side radius 28a can prevent the arrester protrusion 107 from bending in the area where the arrester protrusion 107 is guided out from the sealing strip 105.

[0070] As also in the area of ​​the first cavity section 13a, in the area of ​​the through section 13d, the outer frame 3 and the inner frame 20 can also be constructed so that the sealing joint strip 105 can be clamped between the outer frame 3 and the inner frame 20 by a clamping force applied by the outer frame 3 and the inner frame 20.

[0071] Figures 4a-4f Shown for the receiving device 1 (in Figure 1Different embodiments of the corner area B) marked in . The surrounding sealing strip accommodating cavity 13 or the accommodating device 1 is at least partially left hollow or cut out (removed) in the corner area B, so that the sealing strip 105 remains at least partially exposed or open. In other words, the accommodating device 1 has a hollow area 14; 14'; 14" on its corner area B, which is arranged on the outer frame 3. As a result, a fold can be formed on the sealing strip 105, so that the fold applies as little stress as possible to the sealing strip 105. Accordingly, other corner areas of the accommodating device 1 can also be left hollow.

[0072] Figure 4a The cutout 14 on the outer frame side according to the first embodiment is shown. The cutout 14 is designed so that the sealing strip 105 is completely exposed in the corner area B of the receiving device. The sealing strip 105 has a fold (not shown) that is formed by bending the sealing strip 105 around.

[0073] Figure 4b An embodiment for an inner frame 20 is shown, which comprises an optional inner frame-side recess 24. The inner frame-side recess 24 allows for more space to be provided for the surrounding arrangement of the sealing joint strip 105.

[0074] Figure 4c The outer frame-side recess 14' according to the second embodiment is shown in an external view. The outer frame-side recess 14' comprises a plurality of protruding noses 14a', which protrude perpendicularly to the frame plane from the outer frame 3. The plurality of protruding noses 14a' are arranged in a sector shape and are configured to enclose the sealing strip 105. Figure 4d The inner view of the cutout 14 ′ on the outer frame side is shown. The plurality of lugs 14 a ′ each comprises a hook-shaped end section 14 b ′.

[0075] Figure 4e An interior view of the recess 14″ on the outer frame side according to the second embodiment is shown. Here, the recess 14″ on the outer frame side includes a nose 14a″, which protrudes from the outer frame 3 perpendicularly to the frame plane. The nose 14a″ includes a hook-shaped end section 14b. Viewed along the circumference of the outer frame 3, cutouts (or recesses, gaps) 14c″ are respectively provided at the opposite ends of the nose 14a″, which are provided to accommodate the formed fold of the sealing joint strip 105.

[0076] The plurality of projections 14 a ′ or 14 a ″ can prevent the sealing strip 105 from rubbing against the battery module housing 201 of the battery module 200 (described later).

[0077] Figure 4fA cross-sectional view is shown in the corner area B along the circumference of the accommodating device 1. Here, the cross-sectional view extends through one of the multiple protrusions 14a' or protrusions 14a". The multiple protrusions 14a' or protrusions 14a" are arranged so that the sealing strip accommodating cavity 13 has a larger cross-section in the area of ​​the recessed portion 14; 14'; 14" than the remaining area of ​​the sealing strip accommodating cavity 13 extending along the remaining circumference of the accommodating device 1. In addition, the inner peripheral side of the multiple protrusions 14a' or protrusions 14a" can have a larger radius than the remaining inner peripheral side of the outer frame 3. Due to the larger cross-section and the larger radius of the sealing strip accommodating cavity 13, more space can be provided for the bending of the sealing strip 105, so that the fold formed in the sealing strip 105 will apply as little stress load as possible to the sealing strip 105, and the sealing strip 105 can be protected.

[0078] Furthermore, in order to reduce the formation of folds, the corners of the sealing seam strip 105 can be cut so that they each have a rounding (as viewed in the stacking direction).

[0079] Figure 5 A portion of a battery module 200 is shown. This shows a plurality of pouch cells 100 arranged in a row along the stacking direction, thereby forming a battery stack. Each of the pouch cells 100 is enclosed in one of the aforementioned receiving devices. To couple the plurality of pouch cells 100, the contact plates 40 can be electrically conductively connected to the discharge protrusions 107, for example, by welding. The contact plates 40 are in turn electrically conductively connected to one another via elastic conductors 60.

[0080] Figure 6 Shown in detail Figure 5 The contact plate 40 is plate-shaped and has contact surfaces 41 on its top and bottom for connecting the contact plate 40 to the electrical conductor 60. The contact plate 40 is formed from a conductive material, such as copper. In the example shown, the contact surfaces 41 are configured as welding contact surfaces for welding the contact plate 40 to the electrical conductor 60. In other embodiments, the contact plate 40 can also be electrically conductively connected to the electrical conductor 60 via other connection options at the contact surface 41. The contact plate 40 also includes a through-hole 43 for accommodating the centering projection 11a. The through-hole is arranged in a central section of the contact plate 40, which is located between the contact surfaces 41. Furthermore, an arrester projection contact surface 45 for electrically conductively connecting to one of the arrester projections 107 is provided on the top side of the central section.

[0081] Figure 7aThe front view of the receiving device 1 shows the connection contact side of the receiving frame 3. The outer frame 3 includes a partition section 19 that divides the connection contact side into two contact areas. It can be seen that a contact space 12 for contacting the battery pack is provided between the sliding protrusions 9, and a centering mechanism 11 is provided in the contact space. The contact space 12 is divided by the partition section 19 arranged on the outer frame 3. The contact space 12 is designed so that it does not protrude further from the outer frame 3 than the sliding protrusion 9. The sliding protrusion 9 includes a sliding section 16 on the contact surface with the battery module housing 201.

[0082] Figure 7b A side view of a plurality of receiving devices 1 arranged one behind the other is shown, wherein the pouch battery 100 is in an uncharged state. It can be seen here that the electrical conductors 60 are oversized, so that the electrical conductors 60 sag and form loops.

[0083] Figure 7c Shown Figure 7a , wherein the soft-pack battery pack 100 is in a charged state. Due to the volume change of the soft-pack battery pack 100, the individual receiving devices 1 move relative to each other in the battery stacking direction Z. Due to the oversizing (in the uncharged state of the soft-pack battery pack 100), the conductor 60 can compensate for the movement. Therefore, when the soft-pack battery pack 100 is in a charged state, the conductor 60 is in a state of approximate stretching. Therefore, the oversizing or loop formation of the conductor 60 can achieve a reduction in the pulling force during the charging process of the battery module 200.

[0084] Figure 8a The battery module 200 is schematically shown. The battery module 200 includes a battery housing 201 in which a plurality of 203 receiving devices 1 are arranged in a row and sequentially along a battery stacking direction Z. A pouch battery pack 100 is enclosed in each of the plurality 203 receiving devices 1 .

[0085] The battery module 200 includes a pressure-loading device 205, which is designed to apply pressure to a plurality of soft-pack battery packs 100. Therefore, the pressure-loading device 205 is constructed and designed to apply a predetermined (pressure) prestress to the battery stack along the layer stacking direction S or the battery stacking direction Z, and to maintain the predetermined (pressure) prestress during the volume change of the soft-pack battery pack 100. The pressure-loading device 205 includes a (pressure) plate 205a that can move relative to the battery stack. By changing the volume of each soft-pack battery pack 100 during the charging or discharging phase, the soft-pack battery pack 100 in the battery stack changes its position due to its volume change. Therefore, the plate 205a can be redirected so that a constant prestress acting on the battery stack can be achieved. To this end, the pressure-loading device 205 includes a force-generating member 205b, which is coupled to the plate 205a, and the plate 205a can move relative to the battery stack.

[0086] Figure 8a The illustrated battery module 200 can be used, for example, as a traction battery for a vehicle 300 described below. Furthermore, the battery module 200 can be used, for example, as an electrical storage device for agricultural or power-producing machinery, a mobile auxiliary battery ("power bank"), electric vehicles, electric aircraft (e.g., drones), an uninterruptible power supply (UPS), industrial or domestic applications, a buffer system for solar power plants, or a fast-charging column. Therefore, the battery module 200 can be used in all areas where batteries are used.

[0087] Figure 8bThe entire extension of the circuit connection 50 in the battery module 200 is schematically shown. The circuit connection 50 comprises electrical conductors 60 and shows a current path which couples the individual softpack battery groups 100 to each other via the discharge protrusions 107 and which makes the connection electrodes 70 electrically conductively connected to each other. The circuit connection 50 extends in a meander shape, thereby preventing that the electrical conductors 60 need to be compensated with respect to the line length of the entire battery stack, with respect to the length of the large movement range (of the softpack battery groups 100). Thereby, the loops formed in the electrical conductors 60 only have to compensate the movement between adjacent softpack battery groups 100. This is exemplarily described in detail with respect to a connection section 51 of the circuit connection 50. In the connection section 51, the (not shown) battery stacks are electrically connected to each other. In the connection section 51, the electrical conductors 60 are divided into a plurality of conductor sections 60a-f, which respectively couple a group of softpack battery groups 100 in the battery stack to each other. By forming the conductor sections 60a-f in a meander shape of the circuit connection 50, the movement of the grouped softpack battery groups 100 is compensated by the respective conductor section 60a-f. The movement of the group of softpack battery groups 100 is smaller than the movement of the entire battery stack. Compared to a unique "straight" conductor section, which electrically connects the entire battery stack to each other and which extends in the direction of the battery stack, along the battery stack, by the meander shape, each conductor section 60a-f thus has to compensate less movement.

[0088] Figure 9a A partial top view of the battery module 200 is schematically shown. Here, a first battery stack column 203a and a second battery stack column 203b of the battery module 200 are schematically shown, which are arranged parallel next to each other in the direction of the battery stack Z and which are separated from each other by a separation wall 207. The separation wall 207 prevents a warping or hooking of the parallel arranged first and second battery stack columns 203a, 203b or of the housing 1 and can for example be molded from PA6-GF30.

[0089] Figure 9b A partial side view of the battery module 200 in an uncharged state is schematically shown. The separation wall 207 comprises a first separation wall section 207a and a second separation wall section 207b. Thus, the separation wall 207 is configured in at least two pieces. Figure 9c A partial side view of the battery module 200 in a charged state is schematically shown. The first and second separation wall sections 207a, 207b can move relative to each other. Furthermore, the first and second separation wall sections 207a, 207b are configured such that they at least partially overlap (seen in the side view) independent of the charged state of the battery module 200. To this end, as in the Figure 9b and 9cAs shown in FIG, the first and second separating wall sections 207a, 207b can be constructed as L-shaped and embedded in each other. In addition, the first and second separating wall sections 207a, 207b can be (along a direction perpendicular to Figure 9a 207a, 207b) have a wedge-shaped cross section, wherein the wedge tips are arranged at the mutually facing ends of the first and second partition wall sections 207a, 207b, respectively. The wedge-shaped design prevents the partition wall 207 and thus the first and second partition wall sections 207a, 207b from getting caught on the pouch battery 100 and / or the receiving device 100.

[0090] Figure 10a A second embodiment of a container 1' is shown, in which an outer frame 3' and an inner frame 20' are configured to enclose multiple pouch cells 100 side by side. In an alternative embodiment not shown, the container 1' can be configured to enclose multiple pouch cells 100 one above the other.

[0091] Figure 10b A storage device 1 according to a third embodiment is shown. In this embodiment, the outer frame 3 and the inner frame 20 are connected to each other by a pivot element (not shown), for example a film hinge, and can be pivoted relative to each other about a pivot axis S. In the embodiment shown, the pivot axis S is arranged on the short side (shown here) of the storage device 1. Alternatively, the pivot axis S can also extend along the long side of the storage device 1.

[0092] Figure 11 Vehicle 300 is shown as a passenger car. In other embodiments, vehicle 300 can also be a commercial vehicle (CUV), a heavy-duty truck (HGV), or a bus. Furthermore, the vehicle can be a watercraft, such as a ship with an electric or partially electric drive, or an aircraft. Vehicle 300 includes battery module 200, for example, as a traction battery module.

[0093] Reference Signs List

[0094] 1; 1'; 1" container

[0095] 3; 3' outer frame

[0096] 5 Accommodation section

[0097] 7 Locking protrusion

[0098] 9 Sliding protrusion

[0099] 11 Centering mechanism

[0100] 11a Centering protrusion

[0101] 13 sealing strip receiving cavity

[0102] 13a first cavity section

[0103] 13b second cavity section

[0104] 13c curved section

[0105] 13d through section

[0106] 15 inner peripheral side ramp on outer frame

[0107] 16 sliding section

[0108] 17a, 17b outer peripheral side ramp on outer frame

[0109] 18 protrusion

[0110] 18a radius

[0111] 19 partition section

[0112] 20; 20' inner frame

[0113] 25 inner peripheral side ramp on inner frame

[0114] 27 catch section

[0115] 28 protrusion

[0116] 28a radius

[0117] 40 contact plate

[0118] 41 contact surface

[0119] 43 through hole

[0120] 45 arrester protruding contact surface

[0121] 50 circuit connection

[0122] 51 connection section

[0123] 60 electrical conductor

[0124] 60a-f conductor sections

[0125] 70 connection electrode

[0126] 100 soft pack battery

[0127] 103 layer stack

[0128] 105 sealing strip

[0129] 107 arrester protrusion

[0130] 200 battery modules

[0131] 201 Battery module housing

[0132] 203 multiple containers

[0133] 203a First battery stack column

[0134] 203b Second battery stack column

[0135] 205 pressure loading device

[0136] 205a (pressure) plate

[0137] 205b force generating element

[0138] 207 Separation Wall

[0139] 207a First separating wall section

[0140] 207b Second separating wall section

[0141] 300 Transportation

Claims

1. A container (1; 1'; 1") for a soft pack battery pack (100), the container having a sealing strip (105) and a discharger protrusion (107) protruding from the sealing strip (105) on the peripheral side, wherein: The receiving device (1; 1'; 1") is constructed in a frame-shaped manner and comprises: outer frame (3; 3'); and Inner frame (20; 20'); The inner frame (20; 20') is arranged inside the outer frame (3; 3'), so that a sealing strip accommodating cavity (13) is constructed between the outer frame (3; 3') and the inner frame (20; 20'), and the sealing strip (105) of the soft-pack battery pack (100) can be arranged in a curved manner in the sealing strip accommodating cavity. Therein, at least one of the outer frame (3; 3') and the inner frame (20; 20') has an outwardly directed slope (15) on the inner peripheral side.

2. The receiving device (1; 1'; 1") according to claim 1, wherein The outer frame (3; 3') and the inner frame (20; 20') are configured such that the sealing joint strip (105) can be at least partially clamped between the outer frame (3; 3') and the inner frame (20; 20').

3. The receiving device (1; 1'; 1") according to claim 1, wherein The sealing strip receiving cavity (13) is left hollow at the corner area of ​​the receiving device (1; 1'; 1").

4. The receiving device (1; 1'; 1") according to claim 1, wherein The accommodating device further comprises a latching connector for releasably connecting the outer frame (3; 3') to the inner frame (20; 20'), wherein the outer frame (3; 3') comprises a latching protrusion for latching the inner frame (20; 20') to the outer frame (3; 3').

5. The receiving device (1; 1'; 1") according to claim 1, wherein The receiving device also has ramps (17a, 17b) on the outer peripheral side.

6. The receiving device (1; 1'; 1") according to claim 1, wherein The receiving device further comprises a sliding section (16) on the outer peripheral side for sliding guidance of the receiving device (1; 1'; 1") in the battery module housing (201).

7. The receiving device (1; 1'; 1") according to claim 6, wherein The sliding section (16) comprises two sliding projections (9) in the region of the arrester projection (107), and a centering means (11) for a contact plate (40) for contacting one of the arrester projections (107) is arranged between the sliding projections (9).

8. A battery module (200), comprising: Battery module housing (201); A plurality (203) of receiving devices (1; 1'; 1") according to any one of claims 1 to 7, the receiving devices being arranged one after the other in a direction perpendicular to the frame plane of the receiving devices (1; 1'; 1"); A plurality of soft pack battery packs (100), each of which is enclosed in one of a plurality of (203) receiving devices (1; 1'; 1"); and A pressure-loading device (205) is designed to apply pressure to a plurality of soft-pack battery packs (100).

9. A vehicle (300) comprising the battery module (200) according to claim 8.

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