Stacking device and method

Abstract

A stacking device (100) for manufacturing a battery cell (30) comprises a stacking table (5) for receiving an electrode stack (8) comprising anodes (8a), cathodes (8b) and separators (8c), and a rotary feeding device (10) for feeding the anodes (8a) and / or cathodes (8b) and / or separators (8c) to the stacking table (5), such that the anodes (8a), cathodes (8b) and separators (8c) are arranged in a stacked manner in a predefined orientation on the stacking table (5).

Description

[0001] The invention relates to a stacking device for manufacturing a battery cell and a method for stacking anodes, cathodes and separators of a battery cell using the stacking device.

[0002] Stacking devices, such as single-sheet stackers, play a crucial role in battery cell manufacturing. Single-sheet stacking involves stacking the individual cell components—typically anodes, cathodes, and separators—on top of each other in a repeated and alternating sequence. Current solutions for single-sheet electrode stacking primarily utilize pick-and-place gantry grippers, which pick up and place the sheets, such as the electrodes or separators, individually. However, these systems are very slow due to the repeated acceleration and deceleration of the grippers. Furthermore, the single-sheet stacker must be used in a dry environment, and the separator quickly becomes electrostatically charged, making it difficult to detach from the gantry gripper.

[0003] The object of the present invention is to provide a stacking device that at least partially overcomes the aforementioned disadvantages and enables higher speed and efficiency in the stacking of electrodes and separators.

[0004] This problem is solved by the stacking device according to claim 1 and the method according to claim 12.

[0005] Further advantageous embodiments of the invention will become apparent from the dependent claims, the figures and the following description of preferred embodiments of the present invention.

[0006] A stacking device according to the invention for the production of a battery cell comprises a stacking table for receiving a stack comprising anodes, cathodes and separators, and a rotary feeding device for feeding the anodes and / or cathodes and / or separators to the stacking table, so that the anodes, cathodes and separators are arranged stacked on top of each other in a predefined orientation on the stacking table.

[0007] The rotary approach of the invention enables higher speeds in the manufacturing flow and avoids the inefficient acceleration and deceleration processes required, for example, in pick-and-place systems. Thus, the invention leads to more efficient and cost-effective manufacturing of battery cells.

[0008] A battery cell, for example a lithium-ion battery cell or a solid-state battery cell, can be a prismatic battery cell. A prismatic battery cell comprises a rigid casing in which an electrode stack is arranged. Alternatively, the battery cell can also be designed as a pouch cell with a flexible casing, or as a cylindrical cell or a round cell. The battery cell can be a solid-state battery cell (e.g., a "(semi-)solid-state" battery cell or an "all-solid-state" battery cell).

[0009] A battery cell comprises electrodes made of active material, at least an anode and a cathode. A separator is positioned between the electrodes. The separator prevents direct contact between the electrodes while simultaneously allowing ion flow within the cell. The separator can be ceramic, for example, in a solid-state battery cell. It can also be oxide-based, sulfide-based, or polymer-based, again for a solid-state battery cell. A ceramic separator, as well as a sulfide-based, oxide-based, or polymer-based separator, is easier to transport as a single sheet on the rotary feeder and is also easier to remove from it.

[0010] The electrodes and separators can be arranged as a stack, with anodes, cathodes, and separators stacked alternately. This stack, also called an electrode stack, can be configured as a jellyroll or a jellystack. The electrode stack can then be sealed in a casing, such as a housing, which protects the battery cell from external influences and ensures its structural integrity.

[0011] The predefined orientation of the stacked anodes, cathodes, and separators can be configured such that a separator is positioned between each anode and cathode. For example, the electrode stack can follow the predefined sequence anode, separator, cathode, separator, anode, etc.

[0012] The components, i.e., the anode, the cathode, and the separator, are arranged in a stacked configuration according to the invention. Stacking takes place on the stacking table. For this purpose, the components are conveyed to the stacking table.

[0013] The electrode stack can comprise individual sheets of anodes, cathodes, and separators. The electrode stack can also comprise monocells. Monocells are prefabricated units comprising stacked sheets, for example, one or more anodes, cathodes, and separators.

[0014] Consequently, the stacking device or the rotary feeder can convey individual sheets to the stacking table and assemble them into an electrode stack on the stacking table, or the stacking device or the rotary feeder can convey single cells, for example from a magazine, to the stacking table, which are then stacked into an electrode stack on the stacking table.

[0015] In some embodiments, the rotary feeding device comprises a rotary main drum with a separator receiving area for rotary conveying the separators to the stacking table and / or with an anode receiving area for rotary conveying the anodes to the stacking table and / or with a cathode receiving area for rotary conveying the cathodes to the stacking table.

[0016] For example, the main drum can include one or more receiving areas, which are designed as anode receiving areas.

[0017] For example, the main drum can include one or more recording areas, which are designed as cathode recording areas.

[0018] For example, the main drum can include several recording areas, at least one of which is designed as a cathode recording area and at least one as an anode recording area.

[0019] For example, the main drum can include several receiving areas, one or more of which are designed as separator receiving areas, one or more of which are designed as cathode receiving areas, and one or more of which are designed as anode receiving areas.

[0020] The main drum can, for example depending on the size of the main drum, include any combination of recording areas.

[0021] The main drum can be designed as a rotating cylinder. The receiving areas can be arranged on the outer circumference of the main drum. Sheets or single cells can be conveyed in the receiving areas of the main drum. Separators can be conveyed in the separator receiving area. Anodes can be conveyed in the anode receiving area, and cathodes can be conveyed in the cathode receiving area. Separate receiving areas for anodes, cathodes, and separators ensure that no contamination of the materials occurs.

[0022] The rotary feeding device can include one or more main drums. The main drum can be driven by a motor.

[0023] The rotating main drum can be positioned above the stacking table, for example, centrally above it. The main drum can be positioned so that the receiving areas, located, for example, on its outer circumference, regularly pass over the stacking table during rotation. This allows the sheets or single cells to be transferred from the main drum to the stacking table. The main drum can continue to rotate continuously during the transfer to the stacking table and / or during the receiving of components.

[0024] The main drum may further include a separator transfer device for receiving and releasing the separators and / or an anode transfer device for receiving and releasing the anodes and / or a cathode transfer device for receiving and releasing the cathodes.

[0025] The transfer devices, i.e. the anode transfer device, the cathode transfer device, or the separator transfer device, can be designed in such a way that they hold the respective sheets or monocells in the respective receiving area during rotation on the main drum, or release them and transfer them to the stacking table.

[0026] The respective transfer device, i.e., the separator transfer device, the anode transfer device and / or the cathode transfer device, may include a clamping device.

[0027] A clamping device can comprise one or more clamping fingers or a clamping rail. For example, the clamping fingers can be arranged on a rail. The clamping device can use spring tension to clamp the respective sheets or single cells onto the receiving areas. Thus, the clamping device can include a spring mechanism, for example, one or more springs. Each clamping finger can, for example, contain a spring.

[0028] During transfer to the main drum, the clamping device can open to pick up the components into the receiving area of ​​the main drum. While the main drum is rotating, the clamping device can remain closed to hold the components and convey them to the stacking table. Upon transfer from the main drum to the stacking table, the clamping device can open to release the clamped components from the receiving area, allowing them to be conveyed onto the stacking table, for example, by gravity.

[0029] Mechanical clamping offers the advantage of precise adjustability, as clamping force and positioning can be adjusted to securely and reliably hold and transport components. Furthermore, operating costs can be reduced because no vacuum is required.

[0030] The respective transfer device, i.e., the separator transfer device and / or the anode transfer device and / or the cathode transfer device, may include a suction device.

[0031] The suction device may include a vacuum pump to generate a negative pressure and an associated adhesive force by means of which the components adhere to the respective receiving area of ​​the main drum.

[0032] Furthermore, the suction device can include vacuum holes in the receiving area of ​​the main drum in order to attach the components in the receiving area by means of negative pressure.

[0033] To grip and release the components, the suction device can be controlled and switched on and off, and the vacuum holes can be opened, closed, or covered. When covered or closed, the connection to the vacuum pump can be interrupted.

[0034] The transfer device may also include a scraper that detaches the conveyed component from the receiving area when the receiving area has rotated into the transfer position, so that the transfer from the receiving area to the stacking table takes place or is facilitated.

[0035] The stripper can, for example, be a hold-down device. The components, e.g., a sheet or a single cell, can be released from the receiving area of ​​the main drum by means of a hold-down device, which can, for example, be electronically controlled and arranged on the stacking table. For example, as soon as the receiving area has rotated into a transfer position, e.g., a position above the stacking table, the hold-down device can engage between the component and the main drum or over the component and pull the component downwards onto the stacking table.

[0036] Furthermore, the main drum can include one or more grooves. For example, a hold-down device can engage in a groove to pull off the conveyed components, such as the leaves.

[0037] The stacking table can include one or more transfer devices, which can be configured as described above for the main drum. For example, the stacking table can include one or more clamping devices or a suction device. This facilitates the transfer of components from the main drum to the stacking table.

[0038] The rotary feeding device may further comprise at least one secondary drum for the rotary conveying of the components, for example the anodes and / or cathodes and / or separators, to the main drum.

[0039] The at least one secondary drum can be configured as an anode secondary drum for the rotary conveying of the anodes to the main drum, or as a cathode secondary drum for the rotary conveying of the cathodes to the main drum, or as a separator secondary drum for the rotary conveying of the separators to the main drum.

[0040] The rotary feed device can include several secondary drums, for example one or more anode secondary drums and / or one or more cathode secondary drums and / or one or more separator secondary drums.

[0041] Consequently, the rotary feeding device can include at least one secondary drum, configured as an anode secondary drum for rotary conveying the anodes to the main drum, and / or at least one secondary drum, configured as a cathode secondary drum for rotary conveying the cathodes to the main drum, and / or at least one secondary drum, configured as a separator secondary drum for rotary conveying the separators to the main drum.

[0042] The secondary drum, i.e., the anode secondary drum, the cathode secondary drum, or the separator secondary drum, conveys the components to the main drum and can transfer them to the main drum, for example, into the respective receiving areas of the main drum.

[0043] Therefore, the secondary drum can be positioned above the main drum. The secondary drum can also be positioned to the side of the main drum to feed the main drum's components laterally, for example, from the left or right. With multiple secondary drums, the main drum's components can be fed from several sides.

[0044] Furthermore, the secondary drum can include any feature, such as any structural feature, of the main drum. For example, the secondary drum can include one or more receiving areas and one or more transfer devices as described above and below.

[0045] The secondary drum, for example the anode secondary drum and / or the cathode secondary drum and / or the separator secondary drum, can rotate in the opposite direction to the main drum. This facilitates the transfer of components from the secondary drum to the main drum.

[0046] If the rotary feeding device includes several auxiliary drums that feed to the main drum and a main drum that feeds to the stacking table, the auxiliary drums can transfer their respective components simultaneously. This allows the main drum to be loaded with components in several different receiving areas at the same time.

[0047] For example, three receiving areas—an anode receiving area, a separator receiving area, and a cathode receiving area—can be provided on the main drum, with each receiving area being supplied by a secondary drum. Consequently, an anode secondary drum, a cathode secondary drum, and a separator secondary drum can be provided, each simultaneously transferring its respective delivered anode, cathode, and separator to the main drum. Once all three receiving areas of the main drum are empty and the main drum has, for example, rotated 360°, the secondary drums can reload the main drum simultaneously. Alternatively, the transfer from the respective secondary drums to the receiving areas of the main drum can occur sequentially or in alternating order.

[0048] For example, the rotary feeding device can also include several secondary drums of the same type, such as several separator secondary drums, all feeding a main drum. For this purpose, the main drum can also be provided with several receiving areas of the same type, such as several separator receiving areas.

[0049] The secondary drums can also supply several main drums of the rotary feeding device.

[0050] The transfer of the sheets or single cells can be carried out via the transfer device. The transfer devices of the secondary drum and / or the main drum, for example the separator transfer device and / or the anode transfer device and / or the cathode transfer device, can be actuated by means of a rotary-position-dependent mechanical control device.

[0051] For example, the rotation-position-dependent mechanical control device can include a suitable positioning or control contour. The positioning or control contour can include at least one recess into which a driver arranged on the respective main drum or auxiliary drum can engage as soon as the drum, main drum and / or auxiliary drum, is in a transfer position, thereby actuating the clamping device.

[0052] The transfer position can encompass the rotational positions where the transfer takes place, for example, to the main drum or the stacking table. Since the drums can rotate continuously without braking, the transfer position can include several rotational positions, such as a rotational position range, from the beginning to the end of the transfer.

[0053] The positioning or control contour can also include multiple recesses, as the main drum and / or the secondary drum can have multiple transfer positions. For example, different transfer positions can be provided for picking up and dropping off a component, or for picking up and dropping off multiple components into or from different receiving areas.

[0054] The main drum or the secondary drum can also include several drivers for different transfer devices and / or for different transfer positions, which can engage, for example, in the positioning or control contour, such as the one or more recesses.

[0055] The rotation-position-dependent mechanical control device can include a cam control or an actuating control gear.

[0056] The rotation-position-dependent mechanical control device can, for example by means of a camshaft, open the clamping device when a transfer takes place. The clamping device can remain closed when no transfer is taking place, such as when the components are being conveyed on the main drum or the auxiliary drum. During the transfer from the auxiliary drum to the main drum, the rotation-position-dependent mechanical control devices of the main drum and the auxiliary drum can be coordinated. For example, the clamping devices can open and close sequentially to enable a transfer.

[0057] The rotation-position-dependent mechanical control device can include a baffle. For example, the baffle can be located inside or outside the drum. A driver can be attached to the clamping device and rotate with the drum. As soon as the driver engages the baffle, for example in a transfer position, the clamping device can be actuated, for example, opened. If the driver continues to rotate with the drum and disengages from the baffle, the clamping device can close again, for example by the spring force of one or more springs. The baffle and / or the driver can be rotary, for example as a roller.

[0058] The rotation-position-dependent mechanical control device can include several baffles, since the main drum and / or the secondary drum can include multiple transfer positions.

[0059] Furthermore, the scraper can be designed as a rotation-position-dependent mechanical control device. In this case, the rotation-position-dependent mechanical control device can include a camshaft and one or more grooves on the outer circumference of the drum to release the conveyed leaves.

[0060] For example, the cam of the rotating camshaft can engage in a groove located in the receiving area to push a conveyed leaf away from the outer circumference of the drum, thus releasing it. The camshaft can include multiple cams that engage in several grooves of the receiving area. The camshaft can be connected to the rotating drum via a mechanical transmission so that it rotates at a fixed ratio to the drum's rotational speed, e.g., at the same speed. This can be achieved by a gear, chain, or belt drive.

[0061] Furthermore, the suction device can also be controlled by means of a rotation-position-dependent mechanical control device. For example, a cover can close the vacuum holes of a receiving area that is in the transfer position. This can occur, for example, as soon as a driver engages in a predefined recess of the positioning or control contour. In this way, the connection to the vacuum pump can be interrupted when a receiving area is in the transfer position, allowing the conveyed component to detach from the receiving area.

[0062] The rotation-position-dependent mechanical control device can be located at least partially at one end (e.g., the proximal end) of the drum (main drum or secondary drum), for example, near the drive. The drum (main drum or secondary drum) can be rotatably mounted at its proximal end to a support, such as a wall. For example, a central axis of the drum, which can serve as a rotation axis and on which the drum can be mounted, can be attached to the support.

[0063] In some embodiments, the stacking device includes a Z-folding device for the separators, wherein the stacking table can be movable between a position below the Z-folding device and a position below the rotary feeding device, so that the separators are arranged on the stacking table in a zigzag pattern as a continuous separator track with alternating anodes and cathodes.

[0064] A Z-folding device folds a separator web in a known zigzag pattern, with the anodes and cathodes potentially located within the folds. According to one embodiment, the known Z-folding device can be combined with a rotary feeder, such that the stacking table moves between the Z-folding device and the rotary feeder, receiving either an anode or a cathode from the rotary feeder after each fold of the separator web on the stacking table.

[0065] For this purpose, the rotary feeder can include two main drums, so that the Z-folding device can be arranged between the two main drums.

[0066] For example, each main drum can only convey one type of component, anodes or cathodes. Consequently, the stacking table can move horizontally between a position below the Z-folding device to accommodate the separator track and a position below a main drum conveying anodes, as well as a position below a main drum conveying cathodes.

[0067] This allows the acceleration of the rotary approach to be combined with the efficiency of the well-known Z-folding process in a manufacturing process.

[0068] Some embodiments relate to a method for stacking anodes, cathodes and separators of a battery cell using the stacking device as described above and below, comprising the steps: - rotary conveying of the anodes and / or the cathodes, and / or the separators on the rotary feeding device to the stacking table; and - Transfer of the anodes and / or the cathodes, and / or the separators from the rotary feeding device to the stacking table.

[0069] Rotary conveying can include rotary conveying on one or more main drums and / or rotary conveying on one or more secondary drums to the one or more main drums.

[0070] Furthermore, the process can include Z-folding of the separators designed as separator tracks.

[0071] The stacking device or the method using the stacking device can include any feature of the stacking device or the stacking process described above and below. The process steps are repeatable and can be performed in any order.

[0072] Exemplary embodiments of the invention are now described by way of example and with reference to the accompanying drawing, in which: Fig. 1a schematically shows an embodiment of a main drum in side view; Fig. 1b schematically shows an embodiment of a main drum in side view; Fig. 2 schematically shows a side view of a stacking device according to an exemplary embodiment; Fig. Figure 3 schematically shows a section of a stacking device in sectional view according to an exemplary embodiment; Fig. Figure 4 schematically shows a section of a stacking device in an open perspective view according to an exemplary embodiment; Fig. Figure 5a schematically shows a section of a stacking device with suction device in sectional view according to an exemplary embodiment; Fig. 5b schematically shows a sectional view of a stacking device with suction device according to an exemplary embodiment; Fig. Figure 6a schematically shows an open perspective view of a stacking device with a rotation-position-dependent mechanical control device according to an exemplary embodiment; Fig. Figure 6b schematically shows an open side view of a stacking device with a rotation-position-dependent mechanical control device according to an exemplary embodiment; Fig. Figure 7a schematically shows a side view of a stacking device with a rotation-position-dependent mechanical control device according to an exemplary embodiment; Fig. Figure 7b shows a schematic open perspective view of a stacking device with a rotation-position-dependent mechanical control device according to an exemplary embodiment; Fig. 7c schematically shows a section of a transfer between the main drum and the secondary drum according to an exemplary embodiment; Fig. Figure 8a schematically shows a side view of a stacking device with Z-folding device according to an exemplary embodiment; Fig. Figure 8b schematically shows a side view of a stacking device with Z-folding device according to an exemplary embodiment; Fig. 9a shows a flowchart of a method for stacking a battery cell according to an embodiment; Fig. 9b a flowchart of the procedure from Fig. 9a shows the stacking of a battery cell according to an exemplary embodiment; Fig. Figure 9c shows a flowchart of a method for stacking a battery cell using Z-folding according to an embodiment; Fig. Figure 10a schematically shows a side view of a stacked battery cell according to an exemplary embodiment; and Fig. Figure 10b schematically shows a perspective view of a stacked battery cell according to an exemplary embodiment.

[0073] Examples of a main drum are shown in Fig. 1a and Fig. 1b shown in a side view.

[0074] Main drums 1 of the Fig. 1a and Fig. 1b are designed as cylinders and comprise four receiving areas: an anode receiving area 2, two separator receiving areas 4, and a cathode receiving area 3. The receiving areas are arranged on the outer circumference of the main drum 1.

[0075] In Fig. 1a The recording areas are evenly distributed around the outer circumference. In Fig. 1b the recording areas are arranged in an asymmetrical distribution on the outer circumference, such that the recording areas are concentrated in one segment of the main drum 1, and one segment of the main drum 1 remains free.

[0076] Due to the particle purity, the main drum 1 has separate receiving areas 2, 3 and 4 for anodes, cathodes and separators.

[0077] The secondary drum, for example secondary drums 6a, 6b or 6c of the Fig. 2, can be like main drum 1 of the Fig. 1a or Fig. 1b with receiving areas. However, the receiving areas of the secondary drums can be receiving areas of one type, for example only anode receiving areas 2, only cathode receiving areas 3, or only separator receiving areas 4, as for example in Fig. 2 is shown.

[0078] Fig. Figure 2 shows a side view of a stacking device 100 according to an exemplary embodiment.

[0079] Stacking device 100 comprises a rotary feeding device 10 and a stacking table 5. On the stacking table 5, the anodes, cathodes and separators are stacked in alternating order to form an electrode stack (e.g. 8, Fig. 3 and Fig. 4) a battery cell (e.g. 50, Fig. 10a or Fig. 10b) stacked.

[0080] The rotary feed device 10 comprises four rotary auxiliary drums, one anode auxiliary drum 6a, two separator auxiliary drums 6c and one cathode auxiliary drum 6b.

[0081] The separator secondary drums 6c are arranged between the anode secondary drum 6a and the cathode secondary drum 6b. The secondary drums 6a to 6c each rotate clockwise around their central axis of rotation, as illustrated by the directional arrows within the secondary drums.

[0082] Furthermore, the rotary feeding device 10 comprises a main drum 1, which rotates counterclockwise about its central axis of rotation and is arranged above the stacking table 5. The directional arrow shown inside the main drum 1 illustrates the direction of rotation of the main drum 1. The arrangement of its receiving areas corresponds to that of the main drum 1 of the Fig. 1b.

[0083] Anode secondary drum 6a conveys anodes to the main drum 1, the two separator secondary drums 2c convey separators to the main drum 1 and cathode secondary drum 6b conveys cathodes to the main drum 1.

[0084] Main drum 1 is as in Fig. 1b is designed so that in the transfer position from the secondary drum 6a to 6c to the main drum 1, the four receiving areas (2, 3 and 4, Fig. 1b) in the upper segment (see Fig. 1b) are arranged above the main drum 1. Consequently, the secondary drums 6a to 6c, which are arranged above the main drum 1, can simultaneously transfer their respective conveyed stack components (anode, cathode, or separator) to the main drum 1. The transfer takes place via the respective transfer devices (not visible) of the secondary drums 6a, 6b, 6c and the main drum 1 while the secondary drums 6a, 6b, 6c and the main drum 1 are rotating. Thus, the main drum and the secondary drums do not stop during the transfer; rather, the transfer occurs while they are rotating simultaneously.

[0085] During and after the main drum 1 has been loaded by the secondary drums 6a, 6b and 6c, the main drum 1 continues to rotate and conveys the stacking components one after the other to the stacking table 5.

[0086] In the first position, an anode, for example in the form of an anode sheet, is placed in the anode receiving area (2, Fig. 1b) conveyed to stacking table 5. As soon as the anode receiving area is in the transfer position to stacking table 5, the anode is transferred to stacking table 5.

[0087] In the second position, while the main drum 1 continues to rotate, a separator, for example in the form of a separator blade, is placed in the separator intake area (4, Fig. 1b) conveyed to stacking table 5. As soon as the separator receiving area of ​​the main drum 1 is in the transfer position to the stacking table 5, the separator is transferred to the stacking table 5 and stacked over the anode.

[0088] In the third position, while the main drum 1 continues to rotate, a cathode, for example in the form of a cathode sheet, is placed in the cathode receiving area (3, Fig. 1b) conveyed to stacking table 5. As soon as the cathode receiving area of ​​the main drum 1 is in the transfer position to the stacking table 5, the cathode is transferred to the stacking table 5 and stacked over the separator.

[0089] In the fourth position, while the main drum 1 continues to rotate, the next separator, for example in the form of a separator blade, is placed in the separator receiving area (4, Fig. 1b) conveyed to stacking table 5. As soon as the separator receiving area of ​​the main drum 1 is in the transfer position to the stacking table 5, the separator is transferred to the stacking table 5 and stacked over the cathode.

[0090] After the main drum has rotated further and all four receiving areas are back in their original position, i.e., in the transfer position from the secondary drums 6a to 6c to the main drum 1, the main drum 1 has rotated a full 360°. Then, the stack components are transferred again from the secondary drums 6a to 6c to the main drum 1.

[0091] Consequently, continuous and therefore efficient conveying of the stack components is enabled without time-consuming braking of the rotary feeding device 10.

[0092] The transfer from the secondary drums can also occur with a time delay, instead of simultaneously. When a free pickup area of ​​the main drum 1 rotates into the transfer position to the secondary drum, it can already pick up a new stacking component. This is possible while the main drum 1 still has other occupied pickup areas and, for example, is currently delivering a stacking component to the stacking table 5.

[0093] For example, each of the two separator secondary drums 6c can deliver a separator to each of the two separator receiving areas 4 of the main drum 1 while maintaining particle purity.

[0094] For example, the anode and the first separator, which were originally transferred from the first separator sub-drum (left) to the first separator receiving area 4 of the main drum 1, may already have been transferred to the stacking table 5. However, the cathode and / or the second separator, which were originally transferred from the second separator sub-drum (right), may still be located in the cathode receiving area 3 or the second separator receiving area 4, respectively. If, at this point, the first separator receiving area 4 rotates into the transfer position to the second separator sub-drum (right), the second separator sub-drum may already transfer a separator to the second separator receiving area of ​​the main drum before the main drum 1 has completed one full rotation.

[0095] Alternatively, there can be more secondary drums than receiving areas on the main drum 1. For example, the main drum 1 can have three receiving areas: an anode receiving area 2, a separator receiving area 4, and a cathode receiving area 3. The rotary feeder can be configured as shown in Fig. Figure 2 shows four auxiliary drums 6a to 6c. Both separator auxiliary drums 6c can fill the one separator receiving area 4 of the main drum 1.

[0096] Fig. Figure 3 shows a section of a stacking device 100 in side view.

[0097] Stacking device 100 comprises a main drum 1 and a stacking table 5. The stacking table 5 is static. The main drum 1 is rotatably arranged above the stacking table 5. The receiving areas on the outer circumference of the main drum 1 thus move over the stacking table 5 during the rotation of the main drum 1. The main drum 5 is shown only partially. For example, the section shown could be a section of the stacking device 100. Fig. 2 trade.

[0098] An electrode stack 8 is arranged on stacking table 5, having been stacked by means of the stacking device 100. The electrode stack 8 comprises stacked anodes, separators, and cathodes, with a separator arranged between each anode and cathode. Furthermore, stacking table 5 includes four hold-down devices 11, two at the front and two at the rear (not visible), which secure the electrode stack 8 on the stacking table 5. The hold-down devices 11 can also be configured to grip the stack component during the transfer of the stack components from the main drum 1 to the stacking table 5 and pull the stack component to the stacking table 5. Thus, the hold-down devices 11 can be electronically controlled.

[0099] Main drum 1 comprises several recording areas, of which in Fig. 3 only anode recording area 2 is visible. In Fig. Figure 3 shows the receiving area 2 in the rotation position above the stacking table 5.

[0100] Main drum 1 also includes a transfer device designed as a clamping device 7. Further transfer devices of the main drum 1 for additional receiving areas are not visible. Clamping device 7 holds the anode securely during conveyance to the stacking table 5. Thus, clamping is integrated into the main drum 1 by means of clamping device 7. Clamping device 7 comprises several clamping fingers.

[0101] Clamping device 7 is partially located inside the main drum 1 and is shown in the closed state without anode. This is the state shortly after the anode has been transferred to the stacking table 5. Clamping device 7 can also be opened, for example to transfer the anode to the stacking table 5 (see Figure 1). Fig. 4) or for transfer from a secondary drum to the main drum 1. The dashed line of the clamping device 7 demonstrates the open state of the clamping device 7.

[0102] The tension spring 7a of the clamping device 7 holds the clamping device closed when the main drum 1 continues to rotate after transfer. For example, each clamping finger of the clamping device 7 can encompass a tension spring 7a. Due to centrifugal forces, clamping on one side of each receiving area may be sufficient so that the conveyed stack component, for example, the conveyed sheet, nestles around or against the main drum 1. Each receiving area of ​​the main drum 1 (e.g., 3 and 4 from Fig. 1a and Fig. 1b) may include a transfer device, for example in the form of a clamping device 7 or another clamping device. Alternatively, the transfer device may also be a suction device (see Fig. 5a) be trained.

[0103] Fig. Figure 4 shows a section of a stacking device 100 in an open perspective view.

[0104] The stacking device 100 of the Fig. 4 corresponds to the stacking device 100 from Fig. 1, except that the main drum 1 is in a different rotational position. In Fig. 4 is the cathode receiving area 3 of the main drum 1 in the rotational position above the stacking table 5. Cathode 8b, in the form of a cathode sheet, is clamped to the cathode receiving area 3 by means of a clamping device 7. When cathode 8b is transferred to the stacking table 5 and during the rotation of the main drum 1, the clamping device 7 is opened (as shown by the dashed line in ). Fig. 3 shown), thereby placing cathode 8b on the electrode stack 8.

[0105] The four hold-down devices 11, which are in Fig. 4. Holding the stack 8, they can, upon transfer, remove the cathode 8b from the cathode receiving area 3 by grasping the four grooves 14 of the cathode receiving area and pulling the cathode 8b downwards onto the electrode stack 8.

[0106] In Fig. 3 and Fig. Figure 4 shows a clamping device as clamping device 7. Alternatively, a clamping rail or several clamping fingers can be provided.

[0107] The clamping device can be controlled, for example, by means of a rotation-position-dependent mechanical control device, so that the clamping device opens when the respective receiving area is in the transfer position.

[0108] A secondary drum, for example secondary drums 6a to 6c, can include transfer devices and receiving areas as in Fig. 3 and Fig. 4 shown.

[0109] Fig. Figure 5a shows a section of a stacking device with suction device in a sectional view.

[0110] Stacking device 100 comprises a main drum 1 and a stacking table 5. The stacking table 5 is stationary, while the main drum 1 is arranged rotatably above the stacking table 5. The receiving areas on the outer circumference of the main drum 1 thus move over the stacking table 5 during the rotation of the main drum 1. The main drum 5 is shown only in partial view. For example, the partial view could be a section of the stacking device 100. Fig. 2 trade.

[0111] An electrode stack 8 is arranged on stacking table 5, having been stacked by means of the stacking device 100. The electrode stack 8 comprises stacked anodes, separators, and cathodes, with a separator arranged between each anode and cathode. Furthermore, stacking table 5 includes four hold-down devices 11, two at the front and two at the rear (not visible), which secure the electrode stack 8 on the stacking table 5. The hold-down devices 11 can also be configured to engage the stack component in the grooves 14 during the transfer of the stack components from the main drum 1 to the stacking table 5 and pull the stack component to the stacking table. For example, the hold-down devices 11 can be electronically controlled.

[0112] Main drum 1 comprises several recording areas, of which in Fig. 5a only anode reception area 2 is visible. In Fig. Figure 5a shows recording area 2 in the rotation position above the stacking table 5.

[0113] Main drum 1 further includes a transfer device, which serves as a suction device with a vacuum pump (not visible, e.g. 12, Fig. 5b) and vacuum holes 9. The vacuum pump draws the air out of the main drum 1. Since vacuum holes 9 are arranged in the anode receiving area 2, anode 8a is held in place by negative pressure during conveyance to the stacking table 5. The vacuum holes 9 are distributed in the anode receiving area 2.

[0114] Fig. Figure 5a shows the state shortly before the transfer of the anode 8a to the stacking table 5. For the transfer to the stacking table 5, the vacuum pump is switched off and the hold-downs 11 engage in the grooves 14 to pull the anode 8a away from the main drum 1.

[0115] Alternatively, the vacuum holes 9 can be covered with a cover to interrupt the vacuum supply during the transfer process. The cover can be controlled, for example, by a rotation-position-dependent mechanical control device, so that the cover only covers the vacuum holes 9 when the anode receiving area 2 is in the transfer position.

[0116] A secondary drum, for example secondary drums 6a to 6c, can house transfer devices and receiving areas, as in Fig. 5a is shown.

[0117] Fig. Figure 5b shows a sectional view of a main drum 1 with suction device.

[0118] Main drum 1 off Fig. 5b corresponds to main drum 1 from Fig. 5a. The main drum 1 is designed as a cylinder and comprises four receiving areas: an anode receiving area 2, two separator receiving areas 4, and a cathode receiving area 3. The receiving areas are arranged on the outer circumference of the main drum 1. The dashed lines indicate the boundaries of the receiving areas on the outer circumference of the main drum 1. Vacuum holes 9 are also arranged in each receiving area. These are distributed across the receiving area.

[0119] The collection areas are evenly distributed around the outer circumference. Due to the particle purity requirements, the main drum 1 has separate collection areas 2, 3 and 4 for anodes, cathodes and separators.

[0120] Vacuum pump 12 is located in the center of the main drum 1. It draws air out of the main drum 1, thus creating a vacuum. The vacuum holes 9 and the vacuum generated by the vacuum pump 12 cause the conveyed stacked components to adhere to their respective receiving areas.

[0121] A secondary drum, for example secondary drums 6a, 6b or 6c of the Fig. 2, can be used like main drum 1 of the Fig. 5b be designed. However, the receiving areas of a secondary drum can be receiving areas of one type, for example only anode receiving areas 2, only cathode receiving areas 3, or only separator receiving areas 4, as for example in Fig. 2 is shown.

[0122] Furthermore, main drums 1 of the Fig. 1a and Fig. 1b corresponding to the main drum 1 of the Fig. 5b trained.

[0123] Fig. 6a shows an open perspective view and Fig. 6b an open side view of a main drum 1 with rotation position-dependent mechanical control device.

[0124] An anode 8a, a separator 8c, and a cathode 8b are arranged on the outer circumference of the main drum 1 of the rotary feeder 10. These components are designed in the form of individual sheets and are conveyed sequentially to the electrode stack 8 on the stacking table 5, where they are transferred. A suction device (not visible, e.g., 9, 12) Fig. 5a, Fig. 5b) holds each individual sheet firmly against the outer circumference of the rotating main drum 1.

[0125] In each receiving area of ​​the main drum 1, two grooves 14a are arranged, which serve as a control contour. Furthermore, a camshaft 16 is arranged inside the main drum 1. Together, the camshaft 16 and the grooves 14a serve as a rotation-position-dependent mechanical control device, which releases the conveyed components from the outer circumference of the main drum 1 onto the stacking table 5. A hold-down device 11a secures the electrode stack 8 on the stacking table 5, preventing the individual components from slipping.

[0126] The camshaft 16 comprises a rotating camshaft shaft 19, which rotates about the axis of rotation b. Six arms 18, two for each receiving area of ​​the main drum 1, are attached to the camshaft shaft 19 and rotate with the camshaft shaft 19.

[0127] A cam 17 is rotatably attached to each arm 18. The cam 17 comprises a cam tip that can engage in the grooves 14 to release the conveyed component from the main drum 1. The cam 17 can rotate about the axis of rotation a. Furthermore, each cam 17 is positively engaged with the cam shaft 19 at the wide cam side 17a opposite the cam tip. For clarity, the arm 18 of the foremost cam is only indicated by a dashed line.

[0128] Two cams 17 are arranged parallel to each other. Each pair of cams 17 is offset from each other. The cam pairs 17 are offset by 120° because the main drum 1 comprises three receiving areas and conveys three components: anode 8a, separator 8c, and cathode 8b.

[0129] Fig. 6a and Fig. Figure 6b shows the main drum 1 in the transfer position for transferring the anode 8a to the electrode stack 8 on the stacking table 5. During the transfer, the suction device is in the receiving area (e.g., 2, Fig. 5a, Fig. 5b) the anode 8a is interrupted. Since anode 8a may nevertheless initially remain attached to the receiving area, a pair of cams 17 are used to detach the anode 8a from the main drum 1.

[0130] Consequently, two cams 17 engage in the grooves 14a when the main drum 1 is in the transfer position. The two parallel cams 17 rotate about their axis of rotation a such that the tips of the cams 17 dip into the grooves 14a.

[0131] As in Fig. 6a and Fig. Figure 6b shows two parallel cams 17 immersed in two grooves 14a, pressing the anodes 8a away from the outer circumference of the main drum 1 towards the electrode stack 8, thus detaching the anode 8a from the main drum. To prevent the cams 17 from damaging the anode 8a during this process, they rotate with the camshaft 19 around axis b at the same speed as the main drum 1. This ensures that the cams 17 do not rub against the anode 8a. The rotation of the cams 17 with the camshaft 19 around axis b is achieved by the positive engagement of the cams 17, i.e., the wide cam face 17a, with the camshaft 19.

[0132] Consequently, the camshaft shaft 19 rotates at the same speed as the main drum 1. This is achieved by mechanical transmission via a gear drive (not visible) located at the rear end of the main drum 1.

[0133] Since the cams 17 are positively engaged with the camshaft shaft 19, they fold upwards out of the groove 14a after the camshaft shaft 19 rotates. During this process, the cams 17 rotate about axis a, which is determined by the positions of the other offset cams 17 outside the grooves 14a. Fig. 6a and Fig. 6b is shown.

[0134] The release of the conveyed leaves 8b, 8c is carried out in the same way by the two other cam pairs 17 of the camshaft 16 when the leaves 8b, 8c are in the transfer position.

[0135] Alternatively, instead of one pair of cams 17 per recording area, one cam 17 or more cams 17 can be provided. Furthermore, more or fewer recording areas can be provided on the main drum 1, with at least one cam being provided for each recording area. Alternatively, one cam 17 can also operate several recording areas.

[0136] Fig. Figure 7a shows a schematic sectional view of a stacking device 100 with a rotation-position-dependent mechanical control device according to an exemplary embodiment.

[0137] Stacking device 100 comprises rotary feeding device 10 with main drum 1 and secondary drum 6. Secondary drum 6 transfers components (not visible) to main drum 1 and main drum 1 transfers conveyed components to stacking table 5.

[0138] Main drum 1 and secondary drum 6 rotate in opposite directions. Secondary drum 6 rotates counterclockwise. Main drum 1 rotates clockwise.

[0139] The components are clamped by clamping device 7 (e.g. 7, Fig. 3 and Fig. 4) held on the outer circumference of the main drum 1 or the secondary drum 6. The clamping device 7 comprises a tensioned spring 7a, which holds the clamping device 7 closed, whereby a force must be applied against the spring tension of the spring 7a to open the clamping device 7. For example, each clamping finger of the clamping device 7 comprises a tensioned spring 7a.

[0140] The transfer of components from main drum 1 to stacking table 5 is carried out by means of baffle 41, which serves as a rotation position-dependent mechanical control device.

[0141] While the main drum 1 rotates, and as soon as the main drum 1 is in the transfer position, clamping device 7 abuts the baffle 41. The baffle 41 is arranged on suspension 40 inside the main drum 1.

[0142] Thus, in the transfer position, baffle 41 acts as an actuating element for clamping device 7, thereby transmitting force to the clamping device 7. One side of the clamping device 7 thus serves as a driver. Each clamping finger of the clamping device 7 is opened against the force of the tensioned spring 7a, so that a conveyed component (not visible) is released. Subsequently, during the closing process, the clamping finger of the clamping device 7 is closed again by the pre-tensioned force of the tensioned spring 7a. In a transfer position, a baffle 41 is provided for each clamping finger of the clamping device 7, so that all clamping fingers of a clamping device 7 open simultaneously.

[0143] The transfer of components from secondary drum 6 to main drum 1 is carried out in the same way by means of baffles 41a and 41b, which serve as a rotation position-dependent mechanical control device.

[0144] During the transfer to the main drum 1, the clamping device 7 of the secondary drum 6 collides with the baffle 41b, which is arranged on suspension 40a inside the secondary drum 6, causing the clamping device 7 to open.

[0145] In the transfer position from the secondary drum 6 to the main drum 1, the clamping device 7 of the main drum 1 abuts the second baffle 41a, which is arranged on suspension 40 inside the main drum 1, in order to open.

[0146] Thus, baffles 41a and 41b in the transfer position from secondary drum 6 to main drum 1 act as actuating elements for clamping devices 7, thereby transmitting force to the clamping devices 7. Each clamping finger of the clamping device 7 is opened against the force of the tensioning spring 7a, allowing a conveyed component to detach from the secondary drum 6 and be picked up by the open clamping device 7 of the main drum 1. During the closing process, the clamping devices 7 are closed again by the pre-tensioned force of the tensioning spring 7a.

[0147] Alternatively, baffles 41, 41a, 41b can also be arranged outside the drums, for example in the form of a pin attached to the wall next to the drum. Furthermore, clamping devices 7 can include additional drivers that engage with baffles 41, 41a, 41b to actuate the clamping devices 7 and thereby trigger the actuation mechanism of the clamping device. If the baffles 41, 41a, 41b are arranged outside the drums, the drivers can protrude from the drum, for example by means of grooves arranged on the outer circumference of the drum (e.g., as in Fig. 3 and Fig. 4 shown).

[0148] Fig. Figure 7b shows a schematic open perspective view of the stacking device 100 with rotation-position-dependent mechanical control device of the Fig. 7a.

[0149] In Fig. For clarity, only one chicane 41 on suspension 40 in main drum 1 is shown in 7b. The second chicane 41a of main drum 1 and chicane 41b of secondary drum 6 are not visible.

[0150] The clamping devices 7 of the main drum 1 and secondary drum 6 each comprise five clamping fingers and five grooves 42 arranged on the outer circumference of the drums. The grooves 42 and clamping fingers of the clamping device 7 of one drum are arranged side by side. The clamping fingers of the clamping device 7 of the secondary drum are each offset from the clamping fingers of the clamping device 7 of the main drum 1, so that collisions do not occur, with the clamping fingers of one drum being positioned opposite the grooves 42 of the other drum. The clamping fingers can be offset, for example, by 10 to 20 mm.

[0151] During the transfer of the anode 8a from the secondary drum 6 to the main drum 1, the clamping fingers of the clamping device 7 of the main drum 1 engage in the grooves 42 of the secondary drums 6 and the clamping fingers of the clamping device 7 of the secondary drum 6 engage in the grooves 42 of the main drum 1.

[0152] The opening and closing of the clamping devices 7 of the main and secondary drums 1, 6 is coordinated such that the transfer of the anode 8a from the secondary drum 1 to the main drum 6 occurs during the counter-rotation of the two drums. The clamping fingers of the clamping devices protrude from the interior of the drums 1, 6 through recesses 43, allowing the heads of the clamping fingers to clamp the components on the outer circumference of the drums. The recesses 43 are sufficiently large to allow the clamping fingers of the clamping devices 7 to open.

[0153] Fig. Figure 7c shows a schematic section of a transfer between main drum 1 and secondary drum 6 according to the embodiment of the Fig. 7a and Fig. 7b. Drums 1 and 6 are shown in the sectional view.

[0154] In Fig. 7c shows a clamping finger of the clamping device 7 of the secondary drum 6, and a clamping finger of the clamping device 7 of the main drum 1 is partially visible and partially indicated by dashed lines.

[0155] The clamping fingers of the clamping device 7 of the secondary drum 6 hold the anode 8a firmly against the outer circumference of the secondary drum 6. Simultaneously, the clamping fingers of the clamping device 7 of the main drum 1 engage in the grooves 42 (not visible) of the secondary drum 6 behind the anode 8a. This is indicated by the dashed line of the clamping finger head of the clamping device 7 of the main drum 1.

[0156] Consequently, the clamping fingers of the clamping device 7 of the main drum 1 open, engage in the grooves 42 of the secondary drum 6, and then close again. To enable the clamping fingers of the respective clamping devices 7 to open, recesses 43 are also arranged beneath each clamping finger. The clamp

[0157] Fig. Figure 7c represents the state in which anode 8a is already held by the clamping device 7 of the main drum and only partially held by the clamping device 7 of the secondary drum 6. Consequently, the clamping fingers of the secondary drum 6 are already partially open.

[0158] Next, the clamping fingers of the clamping device 7 of the secondary drum 6 open further to release the anode 8a from the secondary drum. Since both drums 1 and 6 rotate in opposite directions, the anode 8a is thus pulled from secondary drum 6 onto main drum 1, and the transfer is completed. Main drum 1 continues to rotate with the anode 8a clamped to it by the clamping device 7, and conveys it to the stacking table (5, Fig. 7b).

[0159] Furthermore, the clamping device 7 of the secondary drum can open even if the clamping device 7 of the main drum is not yet fully closed. Additionally, the clamping device 7 of the secondary drum 6 can open at least partially before the clamping device 7 of the main drum 1, so that the clamping device 7 of the transferring secondary drum 6 remains open longer than the clamping device 7 of the receiving main drum 1. Once the clamping device 7 of the main drum 1 has gripped the anode 8a, the rotation of the main drum 1 releases the anode 8a from the secondary drum 6, and the main drum 1 carries it along.

[0160] Fig. 8a and Fig. Figure 8b shows a side view of a stacking device 100 with Z-folding device 15.

[0161] Stacking device 100 of the Fig. 8a and Fig. 8b comprises a rotary feeding device 10 with two main drums 1, a Z-folding device 15 for the separator track and a movable stacking table 5. The stacking table 5 is movable in a horizontal direction below the Z-folding device 15 and below the two main drums 1.

[0162] The first rotating main drum 1 (left) includes anode receiving areas (e.g. 2, Fig. 1a, Fig. 1b, Fig. 3, Fig. 5a and Fig. 5b) and anode transfer devices (e.g. 7, Fig. 3 or Fig. 9, Fig. 12, Fig. 5a and Fig. 5b) and conveys anodes 8a to stacking table 5.

[0163] The second rotating main drum 1 (right) includes cathode reception areas (e.g. 3, Fig. 1a, Fig. 1b, Fig. 4) and cathode transfer devices (e.g. 7, Fig. 3; Fig. 9, Fig. 12, Fig. 5a and Fig. 5b) and conveys cathodes 8b to the stacking table 5.

[0164] The transfer from main drum 1 to stacking table 5 is carried out, for example, as already described regarding Fig. 3, Fig. 4 or Fig. 5a described. Furthermore, the anodes 8a and the cathodes 8b can be connected to the respective main drums 1 by means of one or more anode auxiliary drums (e.g., 6a, Fig. 2) or by means of one or more cathode auxiliary drums (e.g., 6b) Fig. 2) be promoted and handed over.

[0165] In Fig. 8a Stacking table 5 is located centrally under the Z-folding device. Fig. Stacking table 5 is located centrally under the first rotating main drum 1 (left), which conveys anodes 8a to stacking table 5. The position of stacking table 5 under the second rotating main drum 1 (right), for transferring the cathode 8b to stacking table 5, is not shown, but can be seen from the movement arrows of the Fig. 8a and Fig. 8b clarifies this.

[0166] The separators 8c of the electrode stack 8 are fed to the stacking table 5 in the form of a separator track. The folded shape of the separator track is created by the horizontal movement of the stacking table 5 under the Z-folding device 15.

[0167] Before each folding, an anode 8a or a cathode 8b is placed on the electrode stack 8 in alternating order by means of the rotating main drums 1, so that each folding of the separator accommodates an anode 8a or a cathode 8b.

[0168] Fig. Figure 9a shows a flowchart of a method 20 for stacking a battery cell according to an embodiment.

[0169] In step 22, the anodes, cathodes, and separators are rotaryally conveyed on the rotary feeder, for example, in the form of sheets or single cells. For example, the anodes, cathodes, and separators on the respective secondary drums are placed onto a main drum (e.g., 1, Fig. 1a to 4) and from the main drum to a stacking table (e.g. 5, Fig. 2, Fig. 3 to Fig. 4) funded.

[0170] In step 23, the anodes, cathodes, and separators are transferred from the rotary feeder to the stacking table. Each anode, cathode, and separator is either transferred individually from the main drum to the stacking table, one after the other, or single cells are transferred sequentially. The transfer is carried out, for example, as described above. Fig. 3-7b explained.

[0171] Fig. Figure 9b shows a flowchart of process step 22 from Fig. 9a according to an exemplary embodiment.

[0172] Steps 21a, 21b and 21c show an embodiment of step 22 from Fig. 9a.

[0173] In step 21a, the anodes, cathodes, and separators rotate on the auxiliary drums and are conveyed to the main drum. For example, the anodes are conveyed from the anode auxiliary drum, the cathodes from the cathode auxiliary drum, and the separators from the separator auxiliary drum to the main drum.

[0174] In step 21b, the anodes, cathodes, and separators are transferred from their respective auxiliary drums to the main drum. The transfer is carried out, for example, as described above. Fig. 7a, Fig. 7b and Fig. 7c explained.

[0175] In step 21c, the anodes, cathodes and separators are conveyed from the main drum to the stacking table.

[0176] Next comes step 23, as regarding Fig. 9a described.

[0177] Before step 22 Fig. 9a or before step 21a from Fig. 9b can, in a preliminary step, transfer the anodes, cathodes, and separators to the rotary feeding device (e.g. 10, Fig. 2 to 7c). For example, the anodes, cathodes and separators are cut as individual sheets from a respective track (anode track, cathode track or separator track), for example by means of a rotary shear knife, or transferred from a magazine in the form of monocells.

[0178] The handover can be to one or more secondary drums (e.g. 6a to 6c, Fig. 2) This can be done. For example, anodes can be placed on one or more secondary anode drums (e.g., 6a, Fig. 2), cathodes on one or more cathode auxiliary drums (e.g. 6b, Fig. 2) and separators onto one or more secondary separator drums (6c, Fig. 2) be handed over.

[0179] Fig. Figure 9c shows a flowchart of a process 20a for stacking a battery cell using a stacking device as shown in Fig. 8a and Fig. 8b shown.

[0180] In step 23a, an anode (e.g. 8a, Fig. 8a, Fig. 6b) via a rotary feeding device (e.g. 10, 1, Fig. 8a, Fig. 8b) to a stacking table (e.g. 5, Fig. 8a, Fig. 8b) transferred. Part of a separator track is already arranged on the stacking table. For the transfer, the horizontally movable stacking table is positioned below the first main drum of the rotary feeding device, which rotaryally conveys anodes.

[0181] In the next step, 25a, the separator track undergoes Z-folding. The stacking table moves horizontally beneath the Z-folding unit (e.g., 15, Fig. 8a, Fig. 8b), which conveys the separator track, and positions itself under the second main drum of the rotary feeder, which carries cathodes (e.g. 8b, Fig. 8a and Fig. 8b) promotes. During this horizontal movement of the stacking table, the separator track is folded in a Z-fold pattern so that the separator track surrounds the anode.

[0182] In the next step 23b, a cathode (e.g. 8b, Fig. 8a, Fig. 8b) from the second main drum of the rotary feeder to the stacking table, so that the cathode lies above the separator on the electrode stack.

[0183] In the next step, 25b, the separator track undergoes another Z-folding. The stacking table moves beneath the Z-folding device (see Fig. 8a and Fig. 8b) and positions itself under the first main drum of the rotary feeder, which conveys anodes. During this horizontal movement of the stacking table, the separator track is folded in a Z-fold pattern so that the separator track surrounds the cathode.

[0184] Next, steps 23a, 25a, 23b and 25b can be repeated until the electrode stack is complete.

[0185] Steps 21a and 21b, 21c, 22 of the Fig. 9a and Fig. 9b can also be applied to the rotary feeding device of the Fig. 9c.

[0186] Fig. Figure 10a shows a schematic side view and Fig. Figure 10b shows a schematic perspective view of a battery cell produced using a stacking device or a method according to an exemplary embodiment.

[0187] Battery cell 1 is a prismatic battery cell and can be stacked, for example, using a stacking device. Fig. 1a to 7c or by means of procedures 20, 20a from Fig. 9a to 9c have been manufactured. Battery cell 30 comprises housing 31, in which the electrode stack (e.g. 8, Fig. 3, Fig. 4, Fig. 5a and Fig.5b) are arranged. Housing 31 is closed on both sides (x-direction) with covers 32. A pressure relief valve 34, through which gas can escape from battery cell 1, is also arranged in housing 31. A terminal 33 is arranged in each of the covers 32 of battery cell 1. Reference symbol list 1 main drum 2 anode pickup area 3 Cathode recording area 4 separator intake area 5 stacking table 6a Anode secondary drum 6b Cathode secondary drum 6c Separator secondary drum 7 Clamping device 7a exciting spring 8 electrode stacks 8a Anode 8b Cathode 8c Separator 9 vacuum hole 10 rotary feeding devices 11 hold-down devices 12 Vacuum pump 14 grooves for hold-downs 14a Grooves for camshaft 15 Z-folding setup 16 Camshaft 17 cam 17 wide side of the cam a axis of rotation of the cam b Axis of rotation of the camshaft shaft 18 Camshaft arm 19 Camshaft shaft 20 methods for stacking electrode stacks 20a Method for stacking electrode stacks 21a rotary conveying on secondary drum 21b Handover to main drum 21c rotary conveying on main drum 22 rotary promotion 23. Transfer to the stacking table 23a Rotary transfer of the anode 23b Rotary transfer of the cathode 25a Z-folding of the separator track 25b Z-folding of the separator track 30 battery cells 31 cases 32 lids 33 connection 34 Pressure relief valve 40 Suspension 41 harassment 41a Harassment 41b Harassment 42 groove for clamping device 43 Exclusion

Claims

Stacking device (100) for manufacturing a battery cell (30), comprising a stacking table (5) for receiving an electrode stack (8) comprising anodes (8a), cathodes (8b) and separators (8c), and a rotary feeding device (10) for feeding the anodes (8a) and / or cathodes (8b) and / or separators (8c) to the stacking table (5), such that the anodes (8a), cathodes (8b) and separators (8c) are arranged in a stacked manner in a predefined orientation on the stacking table (5). The stacking device (100) according to claim 1, wherein the rotary feeding device (10) comprises a rotary main drum (1) with a separator receiving area (4) for rotary conveying the separators (8c) to the stacking table (5) and / or with an anode receiving area (2) for rotary conveying the anodes (8a) to the stacking table (5) and / or with a cathode receiving area (4) for rotary conveying the cathodes (8b) to the stacking table (5). The stacking device (100) according to one of the preceding claims, wherein the main drum (1) further comprises a separator transfer device (7, 7a; 9, 12) for receiving and releasing the separators (8c) and / or an anode transfer device (7, 7a; 9, 12) for receiving and releasing the anodes (8a) and / or a cathode transfer device (7, 7a; 9, 12) for receiving and releasing the cathodes (8b). The stacking device (100) according to one of the preceding claims, wherein the separator transfer device (7, 7a; 9, 12), the anode transfer device (7, 7a; 9, 12) and / or the cathode transfer device (7, 7a; 9, 12) comprises a clamping device (7, 7a). The stacking device (100) according to one of the preceding claims, wherein the separator transfer device (7, 7a; 9, 12) and / or the anode transfer device (7, 7a; 9, 12) and / or the cathode transfer device (7, 7a; 9, 12) comprises a suction device (9, 12). The stacking device (100) according to one of the preceding claims, wherein the rotary feeding device (10) further comprises at least one secondary drum (6a; 6b; 6c) for rotary conveying the anodes (8a) and / or cathodes (8b) and / or separators (8c) to the main drum (1). The stacking device (100) according to one of the preceding claims, wherein the rotary feeding device (10) comprises at least one secondary drum (6a; 6b; 6c) configured as an anode secondary drum (6a) for rotary conveying the anodes (8a) to the main drum (1), and / or at least one secondary drum (6b) configured as a cathode secondary drum (6b) for rotary conveying the cathodes (8b) to the main drum (1), and / or at least one secondary drum (6c) configured as a separator secondary drum (6c) for rotary conveying the separators (8c) to the main drum (1). The stacking device (100) according to claim 6 or 7, wherein the secondary drum (6a; 6b; 6c) rotates in the opposite direction to the main drum (1). The stacking device (100) according to one of the preceding claims, wherein the main drum (1) is arranged above the stacking table (5). The stacking device (100) according to one of the preceding claims, wherein the separator transfer device (7, 7a; 9, 12) and / or the anode transfer device (7, 7a; 9, 12) and / or the cathode transfer device (7, 7a; 9, 12) can be actuated by means of a rotary position-dependent mechanical control device. The stacking device (100) according to one of the preceding claims, further comprising a Z-folding device for the separators (8c), wherein the stacking table (5) is designed to be movable between a position below the Z-folding device (15) and a position below the rotary feeder (10), so that the separators (8c) are arranged on the stacking table (5) in a zigzag pattern as a continuous separator track with alternating anodes (8a) and cathodes (8b). A method (20; 20a) for stacking anodes (8a); cathodes (8b) and separators (8c) of a battery cell (30) using the stacking device (100) according to one of the preceding claims, comprising the steps: - rotary conveying (22) the anodes (8a) and / or the cathodes (8b) and / or the separators (8c) on the rotary feeder (10) to the stacking table (5); and - transferring (23; 23a; 23b) the anodes (8a) and / or the cathodes (8b) and / or the separators (8c) from the rotary feeder (10) to the stacking table (5). Method according to claim 12, further comprising the step:- Z-folding (25a; 25b) of the separators (8c), wherein the separators (8c) are configured as a separator track.

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