Alignment system and method for a tape adapted to create an internal assembly for an electrochemical cell intended for battery production and apparatus comprising said system

Abstract

Alignment system for a tape adapted to create an internal assembly for an electrochemical cell intended for battery production and apparatus comprising the system itself, the latter including a first and a second tape alignment device, a first and a second alignment sensor configured to detect a first and / or a second misalignment condition of the tape with respect to a predefined feed path, a first position sensor configured to detect a first position of the first alignment device and operatively connected to the second alignment device so that it is possible to adjust the actual operating mode of the second alignment device according to instructions related to what is detected by the first position sensor.

Description

[0001] DESCRIPTION of the Italian patent for an Industrial Invention having the title:

[0002] "Alignment system and method for a tape adapted to create an internal assembly for an electrochemical cell intended for battery production and apparatus comprising said system"

[0003] The present invention relates to an alignment system and method for a tape adapted to create an internal assembly for an electrochemical cell intended for battery production and apparatus comprising said system.

[0004] The present invention finds a preferred, though not exclusive, application in the field of electrochemical cell production, for the manufacture of which, for example, a winding of a tape-like article or a stacking of a heterogeneous multilayer structure can be used.

[0005] In fact, in the relevant technical field, it is known to combine electrically conductor and electrically separator elements in layers in order to form an elaborate and functional structure of anodes and cathodes. The article made by overlapping the above-mentioned layers can thus be advantageously wound in coil form or coupled with layers in flat or other configurations, and thus be efficiently implemented for creating the desired electrochemical cell.

[0006] In the present disclosure, as well as in the accompanying claims, certain terms and expressions are deemed to assume, unless otherwise expressly indicated, the meaning expressed in the following definitions.

[0007] The term "internal assembly" of an electrochemical cell generically refers to the structure in which the conductor elements and the separator elements are combined within the electrochemical cell. Such a structure may be a substantially flat layered structure alternating on top of each other (achieved by means of stacking or Z-folding techniques) or it may be a coil structure formed by the spiral winding of conductor and separator tapes alternating with each other.

[0008] The term "separator element" refers to a material that has the ability to isolate two further materials when interposed between them. More preferably, a separator element in this context is an electrically insulating material. The term "separator tape" refers to a "separator element" with an substantially tape-like form.

[0009] Thus, in this context, the term "separator tape" generally refers to a tapelike element that has the ability to isolate two materials when interposed between them. More preferably, a separator tape in this context is an electrically insulating material.

[0010] Consistently with what has been described above, the term "conductor element" identifies a material that has the ability to conduct a current, e.g. electric current, without dispersing it significantly.

[0011] Similar to the previous arguments, the term "conductor tape" refers to a "conductor element" with an substantially tape-like form.

[0012] For a more complete description, it should be noted that in this document, the term "tape" (or "tape-like article") refers to any solid product which, within an industrial production line, is in an elongated form, i.e. having a longitudinal extension significantly greater than its transverse extension.

[0013] It is interesting to note that the tape (or "tape-like article") can be composed of homogeneous or heterogeneous material and can be formed by a single layer or by the superimposition of several layers.

[0014] In certain preferred areas of application, the tape has characteristics that allow it to be functionally flexed as it is fed along a related production line.

[0015] Again, according to the present context, the tape (or tape-like article) can for example be made by overlapping conductor and insulating layers alternated with each other and be intended to form a sandwich to be wound for making a coil intended for the production of electrochemical cells.

[0016] The term "winding" is intended to mean making a spiral structure by rotation of a tape, a strip or more generally a tape-like article about an axis, a flat surface or another structure. By winding, the tape-like article will form one or more turns about the axis or the structure.

[0017] The term "coil" is intended to mean any spiral structure formed by winding a tape, strip or more generally a tape-like article about an axis, a flat surface or another winding structure. Depending on the structure about which the tape-like article is wound, the overall shape of the coil may be substantially cylindrical rather than crushed or otherwise shaped.

[0018] As mentioned above, the coil can be applied not only in the electrochemical cell sector but also in other sectors, such as for example in the capacitor sector, within which coil-shaped structures can likewise be used.

[0019] The term "foil" refers to a thin and essentially flat element.

[0020] In preferred forms of the present invention, a foil may be a portion tape made by cutting the latter in planes transverse to its longitudinal extension.

[0021] The term "closed path" is intended to mean a path along which a winding head or other element travels in which the starting point and the end point of the path substantially coincide.

[0022] The term "continuous" referring to an expression of motion, is intended to mean an operation that takes place without interruption, without there being a stop or an interruption in the operation in question. In particular, with reference to the movement of a tape or of another element, the term "continuous" indicates that the tape, or a portion thereof, is never stopped during its movement.

[0023] The term "substantially constant" referring to a measure or quantity, such as for example the speed of displacement of an object, is intended to mean that said measure or quantity maintains, over time, a value which preferably varies by a maximum of ±10%, preferably by a maximum of ±5%, preferably by a maximum of ±2%.

[0024] Similar to the above, the terms "substantially parallel" or "substantially perpendicular" are used to identify a configuration between two geometric or physical elements (e.g. two lines, two segments, two planes, etc.) that respectively satisfies the condition of parallelism or perpendicularity with a tolerance of ± 5°. Furthermore, the condition of parallelism or perpendicularity between two geometric or physical elements is also understood to be fulfilled when there is no pure translation of one element with respect to another.

[0025] The term "system" denotes a set of interconnected and interacting elements.

[0026] In this context, the term "predefined feed path" identifies a path that an element (e.g. the tape-like separator element) would have to follow if the machining process were to work completely correctly.

[0027] In reality, it is often the case that the actual feed path that the element follows may differ from the predefined feed path for various reasons such as, for example, compositional irregularities or discontinuities in the element that deform in an unpredictable manner, wear zones in the guide devices of the element that change the application of forces and constraints from what was theoretically modelled, etc.

[0028] An "alignment operation" takes place when the actual feed path is substantially overlapped with the predefined feed path.

[0029] Further, in the present context, the term "reference portion" is used to identify a part of an element (e.g. the edge of the tape acting as a separator element) whose position and orientation is used to define a possible difference in alignment between the predefined feed path and the actual feed path. Similarly, the term "reference" is used when related to the apparatus or a device included in it in order to identify at least one spatially constant point against which the difference in alignment of the aforementioned reference portion can be assessed.

[0030] Said alignment, therefore, is preferably achieved by bringing the reference portion in substantial overlap with the reference of the apparatus.

[0031] Consistently, an alignment device is any device capable of producing the desired variation of the actual feed path by correcting it according to the predetermined feed path. Technical solutions mentioned by way of nonlimiting example may include: Omega FIFE-type aligners, aligners with a reinforced structure, deflection rollers, tape dispensing devices (coil holders) configured to be able to move transversely with respect to the predefined feed path, etc.

[0032] In this context, the term "nominal operating condition" refers to a standard operating condition, i.e. one in which the device in question operates under optimal and safe design conditions in order to guarantee the best performance together with a longer life for the device itself. In other words, in this context a nominal operating condition identifies one or more ranges of design conditions around theoretical values.

[0033] The term "intersects" refers to a condition whereby a first element has at least one of its points in common with a second element that intersects it. This condition is particularly evident and understandable when considering projections on the same plane of several intersecting elements.

[0034] The term "integral" referring to the movement of two or more elements, is intended to mean that these elements perform substantially the same movement and substantially simultaneously. In other words, two integral elements move together, as a single body, although they are not necessarily joined or constrained to each other. It can in fact be provided that the respective systems of movement of the two elements are coordinated in such a way as to move, when necessary, the two elements together. Furthermore, it may be provided for the use of a temporary constraint between the two elements which, for example, joins them to each other in some steps, causing them to move together, and separates them again, making them movable independently of each other.

[0035] It should also be specified that the expression "to displace an object between a first position and a second position" is intended to mean both the displacement from the first position to the second position and the displacement from the second position to the first position.

[0036] This definition applies in an analogous way to similar expressions of motion, such as for example to transfer or to move a generic object between two positions or between two zones or even between two different operating configurations.

[0037] In this context, the term "kinematically independent" is intended to mean two or more systems that are able to perform movements completely independently and separately. In other words, kinematically independent systems or devices are configured in such a way that they can carry out their intended movements without changing the position of other involved systems. It is also significant to understand that this condition of kinematic independence does not exclude that different systems or devices can cooperate and / or transfer material to each other along common and substantially overlapping segments of space.

[0038] It is further important to note that this condition of kinematic independence does not exclude that parts different and directly independent from each other have a common driving origin. In this sense, kinematically independent systems could be moved, for example, by a same drive shaft by means of different types of drive connections, while still realising their own motions that do not directly influence each other.

[0039] The term "movable" refers to portions or devices provided with the ability to move through space. It is relevant to note that these portions or devices can be movable both because they are provided with their own means of displacement ad because they are constrained to further portions configured with displacement abilities.

[0040] The terms "upstream" and "downstream" indicate operating steps that have their own specific position in the sequencing of a process.

[0041] More specifically, if operation B occurs upstream of operation A, it means that operation B will occur sequentially before said operation A.

[0042] Similarly, if operation B occurs downstream of operation A, it means that operation B will occur sequentially after said operation A.

[0043] These considerations for operational steps also apply to devices and / or portions that are positioned respectively upstream or downstream of others according to the sequential operating flow of the process considered and described.

[0044] The term "as complementary" is intended to mean a configuration of a spatial element (e.g. surface) such as to fill the space not occupied by a reference element.

[0045] In particular, if a spatial surface is configured as complimentary with a reference surface, it is shaped in such a way as to substantially follow the profile of the reference surface by occupying a space not occupied by the reference surface at least in one of its surroundings. By way of non-limiting example, a spatial element configured as complimentary with a reference element with a conical extension can be made as a recess with a substantially funnel-shaped section.

[0046] The term "to interact" is intended to mean a condition that allows one to actively intervene by changing certain conditions or configurations in which an element is acting.

[0047] For example, the expression "a folding unit interposed between said dispensing unit and said winding unit and configured to interact with said tape along said feed path" is intended to mean that said folding unit is able to actively modify and define the spatial extension of the tape feed path.

[0048] The term "rod" refers to an element having a solid or hollow three- dimensional body preferably developed along a main axis, which may be slabshaped, linear, double plate, circular, 'C'-shaped, 'H'-shaped or similar. In this context, the term "rod" can be regarded as similar to "bar".

[0049] The term "slab-shaped" refers to an object having a slab-like shape, i.e. having a parallelepiped body with a prevailing longitudinal development (i.e. length) and a thickness, measured perpendicular to the longitudinal development, much less than the length. This slab comprises two substantially planar, parallel and opposite surfaces.

[0050] The Applicant, in the context of the constant need to increase the performance and efficiency of its production processes, has preliminarily observed how, in a production line for an internal assembly of electrochemical cells (whether of the "stacking" or "z-folding" type or of the "coil-winding" type), the feed speed of the tape (or portions thereof), with respect to the unit that carries out the coupling, can constitute an important element of limitation of the production capacity of the line itself.

[0051] Furthermore, this limitation is even more critical if high precision is required in the formation of the assembly. In particular, the Applicant has noted that in many applications, such as for example in the production of electrochemical cells, high precision in the geometry of the couplings of the different materials used must be ensured in order to ensure the required performance of the finished product.

[0052] At the same time, the Applicant noted that the possible correction of the tape alignment can be a critical element for the correct manufacture of the internal assembly.

[0053] The Applicant also perceived that different types of misalignments can occur (e.g. systematic, punctual, incremental, etc.) and that it was necessary to be able to deal with this variety effectively.

[0054] Additionally, the Applicant perceived that certain types of misalignment tend to bring an alignment device "into a drift condition", operating continuously in order to try to correct an alignment error that is sometimes close to or even exceeds the alignment device's maximum correction capability.

[0055] In other words, the Applicant found that allowing alignment devices to operate at conditions close to the theoretical nominal design conditions can improve the accuracy of the internal assembly, while allowing corrections to be made by reducing the time required for corrections by the devices themselves: in other words, the Applicant found that reducing the possibility of drift conditions allows for a qualitative improvement in the process of making a battery and for efficiency in the process, reducing waste and the time required for corrective actions.

[0056] Even more, the Applicant found that it was possible to envisage an innovative approach to this unknown type of problem by performing collaborative and synergistic management between the plurality of alignment devices in order to reduce the problems that a single device could incur.

[0057] In a first aspect thereof, therefore, the present invention relates to an alignment system for a tape adapted to create an internal assembly for an electrochemical cell intended for battery production.

[0058] Preferably, said alignment system comprises a first alignment device configured to move said tape so as to align it according to a predefined feed path of said tape.

[0059] Preferably, said first alignment device is operating in a first actual operating mode.

[0060] Preferably, said alignment system comprises a second alignment device for said tape.

[0061] Preferably, said second alignment device is operating with a second actual operating mode.

[0062] Preferably, said second alignment device is configured to move said tape to align it according to said predefined feed path.

[0063] Preferably, said alignment system comprises a first alignment sensor configured to detect a first misalignment condition between said tape and said predefined feed path. Preferably, said first alignment sensor is operatively associated with said first alignment device via a processing unit so that said first alignment device corrects said first misalignment condition.

[0064] Preferably, said alignment system comprises a second alignment sensor configured to detect a second misalignment condition between said tape and said predefined feed path.

[0065] Preferably, said first alignment sensor is operatively associated with said second alignment device via said processing unit so that said second alignment device corrects said second misalignment condition.

[0066] Preferably, said alignment system comprises a first position sensor operatively connected to said second alignment sensor.

[0067] Preferably, said first position sensor is configured to detect a first position of said first alignment device.

[0068] Preferably, said first position sensor is operatively connected to said second alignment device via said processing unit.

[0069] Preferably, said second alignment device is configured to adjust said second actual operating mode according to instructions received from said processing unit related to what was detected by said first position sensor.

[0070] Thanks to this technical solution, it is possible to optimise the operating conditions of the first alignment device by preventing it from going into a drifting operating condition and making sure it is in ideal working conditions.

[0071] In this way, the second alignment device can be activated synergistically with the first alignment device, making the latter work better and reducing the alignment correction specifically required of it.

[0072] It is clear that this collaborative operating mode between the first and second alignment device also allows for better management of the different types of misalignment described above.

[0073] Additionally, this technical solution allows for distributed alignment variations across a plurality of alignment devices also operating simultaneously, thus requiring less respective correction and being overall faster and more efficient. Furthermore, the Applicant has found that with this invention it is possible to reduce unwanted tension effects that the tape undergoes during alignment correction.

[0074] In a second aspect thereof, the present invention is directed to an apparatus for making an internal assembly for an electrochemical cell intended for producing batteries.

[0075] Preferably, said apparatus comprises a dispensing unit to dispense at least one tape along a predefined feed path.

[0076] Preferably, said apparatus comprises an alignment system, placed downstream of said dispensing unit according to said predefined feed path, having at least in part the characteristics described above.

[0077] Preferably, said apparatus comprises a coupling unit, placed downstream of said alignment system according to said predefined feed path.

[0078] Preferably, said coupling unit is configured to combine a plurality of conductor elements and at least one separator element in a predefined structure, so as to form an internal assembly of said electrochemical cell.

[0079] Preferably, said tape is at least one of said conductor elements and said at least one separator element.

[0080] Thanks to this technical solution, it is possible to achieve the benefits described above in relation to the first aspect of the present invention, in particular to be able to efficiently produce the internal assembly for the desired electrochemical cell for battery production with high quality and yield.

[0081] In a third aspect thereof, the present invention is directed to a method for aligning a tape, the latter intended for creating an internal assembly of an electrochemical cell for producing batteries.

[0082] Preferably, said method comprise dispensing said tape along a predefined feed path.

[0083] Preferably, said method comprises setting up a first and second alignment device configured to move said tape so as to align it according to said predefined feed path. Preferably, said method comprises defining a first and second nominal operating condition of said first and second alignment device, respectively.

[0084] Preferably, said method comprises identifying a first actual operational condition of said first alignment device.

[0085] Preferably, said method comprises identifying a second actual operating condition of said second alignment device.

[0086] Preferably, said method comprises, in the event that said first actual operating condition is not within said first nominal operating condition, modifying said second actual operating condition, keeping it within said second nominal operating condition, so as to bring said first actual operating condition within said first nominal operating condition.

[0087] The Applicant found that with this solution, it is possible to align the tape according to the predefined feed path while also acting through the second alignment device that supports the first alignment device while keeping both in their nominal operating condition and thus preventing the alignment devices from wearing out quickly or failing to work under ideal conditions.

[0088] The present invention, in at least one of the aforesaid aspects, may have at least one of the further preferred features set forth below.

[0089] Preferably, said second alignment device is placed upstream, relative to said predefined feed path, of said first alignment device.

[0090] This makes it possible to effectively intervene on the tape before the first device has to intervene.

[0091] Preferably, said second alignment device is a dispensing device of said tape, which can be moved in different orientations with respect to said predefined feed path.

[0092] Preferably, said dispensing device of said tape is a dispensing device of said tape, e.g. a dispensing coil.

[0093] Thanks to this solution, it is possible to advantageously modify the tape alignment already by acting directly on its dispensing device. Preferably, said different orientations identify displacements produced by rotations, translations or combinations thereof.

[0094] Preferably, the alignment system comprises a third alignment device for said tape, which is configured to move said tape so that it is aligned according to said predefined feed path.

[0095] Preferably, said third alignment device is operating with a third actual operating mode.

[0096] Preferably, the alignment system comprises a third alignment sensor of said tape configured to detect a third misalignment condition between said tape and said predefined feed path.

[0097] Preferably, said third alignment sensor is operatively associated with said third alignment device via said processing unit so that said third alignment device corrects said third misalignment condition.

[0098] Preferably, said alignment system comprises a second position sensor configured to detect a second position of said second alignment device.

[0099] Preferably, said second position sensor is operatively connected to said third alignment device via said processing unit.

[0100] Preferably, said third alignment device is configured to adjust said third actual operating mode according to instructions received from said processing unit related to was what detected by said second position sensor.

[0101] With this technical solution, it is possible to further improve the tape alignment by working on the third alignment device that collaborates with the second alignment device, which in turn works in support of the first alignment device, thus implementing a more extensive collaborative system of aligners.

[0102] Preferably, said third alignment device is placed upstream, relative to said predefined feed path, of said second alignment device.

[0103] This makes it possible to effectively intervene on the tape before the first and / or second device has to intervene. Preferably, said first and / or second position sensor(s) is / are of the photoelectric, magnetic, RGB type, configured for image acquisition, encoder, ultrasound, infrared or vision systems.

[0104] In this way, the position of the first and / or second alignment device can be detected accurately and quickly.

[0105] Preferably, said apparatus comprises a movable portion configured to reversibly move along a displacement direction between a first configuration distal to said dispensing unit and a second configuration proximal to said dispensing unit.

[0106] Preferably, said movable portion comprises one or more of said first or second or third alignment devices.

[0107] This makes it possible to obtain a coupling of the tape wherein the alignment is continuously checked and corrected even during the steps in which the movable portion displaces itself to avoid interruption in feeding the tape.

[0108] Thanks this technical solution, it is therefore possible to further improve the process of continuously feeding and coupling the tape by correcting any misalignment even while the movable portion is in action.

[0109] It is also evident that this correction to the alignment of the tape produced at the movable portion corrects any deviation of the tape from the intended path whether the misalignment is due to displacement of the movable portion itself, or due to other causes in the process.

[0110] Preferably, said tape is a separator tape.

[0111] Preferably, said internal assembly of said electrochemical cell is a structure formed by a stack of conductor foils individually separated by said separator tape.

[0112] Preferably, said coupling unit is a stacking unit of said conductor foils separated by said separator tape.

[0113] In this way, an internal assembly in the form of a multilayer stacked structure for prismatic batteries can be precisely and efficiently realised. According to a further embodiment, said tape is a separator tape cut into a plurality of separator foils.

[0114] Preferably, said internal assembly of said electrochemical cell is a multilayer structure of said separator foils alternating with a plurality of conductor foils.

[0115] Preferably, said coupling unit is a stacking unit to create said internal assembly.

[0116] In this way, an internal assembly in the form of a multilayer stacked structure for batteries can be precisely and efficiently created.

[0117] According to a further embodiment, said tape is at least one of a plurality of tapes comprising a pair of conductor tapes and a pair of separator tapes.

[0118] Preferably, said internal assembly of said electrochemical cell is a coil formed by said conductor tapes and said separator tapes.

[0119] Preferably, said coupling unit is a winding unit of said pair of conductor tapes and said pair of separator tapes.

[0120] In this way, it is possible to precisely control the positioning of all elements of the internal assembly during its creation.

[0121] Preferably, said method comprises setting up a first alignment sensor configured to detect a first misalignment condition between said tape and said predefined feed path and operatively associated with said first alignment device via a processing unit.

[0122] Preferably, said method comprises selectively actuating said first alignment device so as to correct said first misalignment condition according to instructions received from said processing unit related to what was detected by said first alignment sensor.

[0123] With this technical solution, the correction to be made to the detected misalignment can be precisely and quickly detected and quantified.

[0124] Preferably, said identifying said first actual operating condition is performed by means of a first position sensor configured to detect a first position of said first alignment device and operatively connected to said second alignment device via said processing unit. Preferably, said modifying said second actual operating mode of said second alignment device is performed according to instructions received from said processing unit related to what was detected by said first position sensor.

[0125] In this way, effective action can be taken to correct the misalignment condition by acting on the second alignment device.

[0126] According to a further aspect, the present invention is directed to an alignment system for a tape adapted to create an internal assembly for an electrochemical cell intended for battery production, comprising a first alignment device configured to move said tape so as to align it according to a predefined feed path of said tape.

[0127] Preferably, said system comprises a first alignment sensor, configured to detect a first misalignment condition between said tape and said predefined feed path and operatively associated with said first alignment device via a processing unit so that said first alignment device corrects said first misalignment condition.

[0128] Preferably, said system includes a first position sensor configured to detect a first position of said first alignment device.

[0129] With this technical solution, a drift condition of the first alignment device can be detected.

[0130] Indeed, the Applicant noted that this situation is particularly disadvantageous and leads to a less than ideal operating condition of the alignment systems, also shortening their average life span.

[0131] According to a further aspect, the present invention is directed to an apparatus for making an internal assembly for an electrochemical cell intended for battery production, comprising a dispensing unit for dispensing at least one tape along a predefined feed path.

[0132] According to an embodiment, said apparatus comprises an alignment system placed downstream of said dispensing unit according to said predefined feed path.

[0133] According to an embodiment, said alignment system comprises, at least in part, the technical features referred to above. According to an embodiment, said apparatus comprises a coupling unit, placed downstream of said alignment system according to said predefined feed path, configured to combine a plurality of conductor elements and at least one separator element, in a predefined structure so as to form said internal assembly of said electrochemical cell, wherein said tape is at least one of said conductor elements and said at least one separator element.

[0134] With this technical solution, it is possible to detect a drift condition of the first alignment device while an internal assembly for an electrochemical cell is being made. This increases the accuracy and yield of the production process.

[0135] According to a further aspect, the present invention is directed to a method for detecting a drift condition of a first alignment device of a tape, the latter intended for creating an internal assembly of an electrochemical cell for battery production.

[0136] Preferably, said method comprises dispensing said tape via a dispensing unit along a predefined feed path.

[0137] Preferably, said method comprises setting up a first alignment device configured to displace said tape so as to align it according to said predefined feed path.

[0138] Preferably, said method comprises defining a first nominal operating condition of said first alignment device.

[0139] Preferably, said method comprises identifying a first actual operating condition of said first alignment device by means of a first position sensor configured to detect a first position of said first alignment device.

[0140] Preferably, said method comprises, in the event that said first actual operating condition is not within said first nominal operating condition, activating a procedure for modifying said first actual operating condition.

[0141] In this way, it is possible to detect and intervene to modify a drift condition of the first alignment device, thus improving its operating condition and increasing its life span.

[0142] The present invention, in at least one of the aforesaid aspects, may have at least one of the further preferred features set forth below. According to an embodiment, said first position sensor is of the photoelectric, magnetic, RGB type, configured for image acquisition, encoder, ultrasound, infrared or vision systems.

[0143] In this way, the position of the first and / or second alignment device can be detected accurately and quickly.

[0144] According to an embodiment, said apparatus comprises a movable portion configured to reversibly move along a displacement direction between a first configuration distal to said dispensing unit and a second configuration proximal to said dispensing unit.

[0145] According to an embodiment, said movable portion comprises said first alignment device.

[0146] This makes it possible to obtain a coupling of the tape wherein the alignment is continuously checked and corrected even during the steps in which the movable portion displaces itself to avoid interruption in feeding the tape.

[0147] According to an embodiment, said alignment system comprises a second alignment device of said tape, configured to move said tape so that it is aligned according to said predefined feed path and operating with a second actual operating mode.

[0148] According to an embodiment, said alignment system includes a second alignment sensor configured to detect a second misalignment condition between said tape and said predefined feed path and operatively associated with said second alignment device via said processing unit so that said second alignment device corrects said second misalignment condition.

[0149] According to an embodiment, said first position sensor is operatively connected to said second alignment device via said processing unit.

[0150] According to an embodiment, said second alignment device is configured to adjust said second actual operating mode according to instructions received from said processing unit related to what was detected by said first position sensor.

[0151] Thanks to this technical solution, it is possible to optimise the operating conditions of the first alignment device by preventing it from going into a drifting operating condition and making sure it is in ideal working conditions. In this way, the second alignment device can be activated synergistically with the first alignment device, making the latter work better and reducing the alignment correction specifically required of it.

[0152] According to an embodiment, said second alignment device is placed upstream, relative to said predefined feed path, of said first alignment device.

[0153] This makes it possible to effectively intervene on the tape before the first device has to intervene.

[0154] According to an embodiment, said alignment system comprises a third alignment device of said tape, configured to move said tape so that it is aligned according to said predefined feed path and operating with a third actual operating mode.

[0155] According to an embodiment, said alignment system comprises a third alignment sensor of said tape configured to detect a third misalignment condition between said tape and said predefined feed path and operatively associated with said third alignment device via said processing unit so that said third alignment device corrects said third misalignment condition.

[0156] According to an embodiment, said alignment system comprises a second position sensor configured to detect a second position of said second alignment device and operatively connected to said third alignment device via said processing unit.

[0157] According to an embodiment, said third alignment device is configured to adjust said third actual operating mode according to instructions received from said processing unit related to what was detected by said second position sensor.

[0158] With this technical solution, it is possible to further improve the tape alignment by working on the third alignment device that collaborates with the second alignment device, which in turn works in support of the first alignment device, thus implementing a more extensive collaborative system of aligners.

[0159] According to an embodiment, said method comprises a movable portion configured to reversibly move along a displacement direction between a first configuration distal to said dispensing unit and a second configuration proximal to said dispensing unit, said movable portion comprising said first alignment device.

[0160] This makes it possible to obtain a coupling of the tape wherein the alignment is continuously checked and corrected even during the steps in which the movable portion displaces itself to avoid interruption in feeding the tape.

[0161] According to an embodiment, said method comprises setting up a second alignment device configured to displace said tape so that it is aligned according to said predefined feed path.

[0162] According to an embodiment, said method comprises defining a second nominal operating condition of said second alignment device.

[0163] According to an embodiment, said method comprises identifying a second actual operating condition of said second alignment device.

[0164] According to an embodiment, said procedure for modifying said first actual operating condition provides for modifying said second actual operating condition, keeping it within said second nominal operating condition, so as to bring said first actual operating condition within said first nominal operating condition.

[0165] The Applicant found that with this solution, it is possible to align the tape according to the predefined feed path while also acting through the second alignment device that supports the first alignment device while keeping both in their nominal operating condition and thus preventing the alignment devices from wearing out quickly or failing to work under ideal conditions.

[0166] According to an embodiment, said method comprises setting up a first alignment sensor configured to detect a first misalignment condition between said tape and said predefined feed path and operatively associated with said first alignment device via a processing unit.

[0167] According to an embodiment, said method comprises selectively actuating said first alignment device so as to correct said first misalignment condition according to instructions received from said processing unit related to what was detected by said first alignment sensor.

[0168] With this technical solution, the correction to be made to the detected misalignment can be precisely and quickly detected and quantified. According to an embodiment, identifying said first actual operating condition is performed by means of a first position sensor configured to detect a first position of said first alignment device and operatively connected to said second alignment device via said processing unit.

[0169] According to an embodiment, modifying said second actual operating condition of said second alignment device is performed according to instructions received from said processing unit related to what was detected by said first position sensor.

[0170] The Applicant found that with this solution, it is possible to align the tape according to the predefined feed path while also acting through the second alignment device that supports the first alignment device while keeping both in their nominal operating condition and thus preventing the alignment devices from wearing out quickly or failing to work under ideal conditions.

[0171] The proposed invention therefore solves at least part of the problems of the prior art.

[0172] The characteristics and advantages of the invention will become clearer from the detailed description of an embodiment shown, by way of non-limiting example, with reference to the appended drawings wherein:

[0173] - Figure 1 is a schematic side view of the apparatus for making an internal assembly for an electrochemical cell for battery production according to the present invention;

[0174] - Figure 2 is a schematic perspective view of a portion of the apparatus according to the present invention;

[0175] - Figures 3 and 4 are detailed perspective views from below of a first alignment device comprised in the present invention;

[0176] - Figure 5 is a perspective view from above of a detail of the apparatus according to the present invention,

[0177] - Figure 6 is a perspective view from above of a pair of first alignment devices comprised in the present invention;

[0178] - Figure 7 is a perspective view of a section according to plane VII in Figure 6,

[0179] - Figures 8 and 9 are further perspective views of the embodiment of the invention in Figure 6,

[0180] - Figures 10 and 11 are perspective views from above of a second alignment device according to the present invention;

[0181] Figure 12 is a schematic view from above of the second device in Figure 10,

[0182] - Figure 13 is a perspective view of a section according to plane XIII in Figure 12,

[0183] - Figure 14 is a perspective view of a section according to plane XIV in Figure 12,

[0184] - Figure 15 is a detailed perspective view of an element in Figure 10.

[0185] Referring initially to Figure 1, 1000 identifies an apparatus for creating an internal assembly 3 for an electrochemical cell intended for battery production.

[0186] The apparatus 1000 comprises an alignment system 1 for a tape 80 adapted to create the internal assembly 3.

[0187] In embodiments of the present invention not shown in the accompanying figures, the internal assembly 3 may comprise a structure consisting of a stack of conductor foils individually separated or, alternatively, a multilayer structure of alternating separator foils and conductor foils. Such foils can advantageously be made from a tape or a strip of material conveniently cut into predefined portions.

[0188] In preferred embodiments described in detail below, the apparatus 1000 is intended to perform the coupling of the tape 80 or a tape-like article N, made from a plurality of tapes, for the production of electrochemical cells. It is however understood that this represents a possible embodiment example and that the apparatus 1000 according to the present invention may be effectively used for coupling tape-like articles also intended for different uses, even in fields other than those relating to the production of electrochemical cells.

[0189] For example, still in the field of energy storage, the present invention can find application in the production of other coupled components intended for batteries or supercapacitors.

[0190] In general and still with reference to Figure 1, the apparatus 1000 is configured to supply at least the tape 80, by means of a dispensing unit 2, and couple it, by a coupling unit 600, thus creating the internal assembly 3.

[0191] For illustrative and non-limiting purposes only, in the following embodiments the coupling unit 600 will be described as the winding unit. In fact, as shown in Figure 2, the apparatus 1000 may also be used in the context of a production line for electrochemical cell coils B, in which the tapelike article N is made by a combination of several tapes 80, in detail a plurality of four tapes Nl, N2, N3, N4 that are overlapped between them forming the tape-like article N wound in the coil B.

[0192] It is clear to a person skilled in the art that the embodiments described below regarding the use of the tape 80 are also immediately implementable in the aforementioned plurality of the tapes Nl, N2, N3, N4.

[0193] Preferably, the plurality of tapes Nl, N2, N3, N4 comprises two conductor tapes Nl and N3 and two separator tapes N2 and N4.

[0194] Still with reference to Figure 1, the presence of a supply unit 700 interposed between dispensing unit 2 and the winding unit 600 can be noted.

[0195] More comprehensively, the dispensing unit 2 and the winding unit 600 are configured to dispense and wind tape 80, respectively, along a feed path PA. This clarification aims at clearly defining the feed direction of the tape 80 and the consequent clear possibility of identifying process steps that are upstream or downstream with respect to the feed path PA.

[0196] Still with reference to the embodiments shown in Figures 1 and 2, both the tape 80 and the plurality of tapes Nl, N2, N3, N4 are preferably supplied by special dispensing devices 6 comprised in the dispensing unit 2.

[0197] This tape 80 or plurality of tapes Nl, N2, N3, N4 may preferably be tapes made of polymeric material, more preferably polyolefins and even more preferably polyethylene, polypropylene or their co-polymers. These types of tapes advantageously have such a yielding nature that they can be rolled up on themselves without suffering critical structural damage and / or producing fractures in the material itself.

[0198] Figures 1 and 2 show an embodiment of the dispensing devices 6 of the tape (e.g. separators or conductors), which may be large coils in which a tape is collected so as to be unwound and then supplied during the operation of the apparatus 1000.

[0199] According to some embodiments, the coils are mounted on mobile coil holders described in more detail below. The tapes obtained from the dispensing devices 6 are supplied to the supply unit 700 (placed downstream of the dispensing unit 6) which, in preferred embodiments, is responsible for combining the plurality of tapes Nl, N2, N3, N4 with each other so as to form the tape-like article N before or during the winding performed by the winding unit 600. It will be appreciated that the tape 80 or the plurality of tapes Nl, N2, N3, N4, before being supplied to supply unit 700 may further pass through further units e.g. for preliminary processing on the tapes.

[0200] In preferred embodiments, the tape 80 or the plurality of tapes Nl, N2, N3, N4 are fed continuously, preferably into the supply unit 700.

[0201] In other words, each tape, or possibly one or more of the aforementioned tapes, is fed by the dispensing devices 6 and introduced into the supply unit 700 without ever stopping, proceeding at a speed greater than zero and preferably substantially constant.

[0202] However, there may be the need to provide for interruptions of one or more of the tapes dispensed or to slow down feeding one or more of the tapes for other operating needs related to the specific processing being carried out.

[0203] For example, while producing coils intended for creating electrochemical cells, it can be provided that the tapes that form anode and cathode respectively are not present in the terminal portion of the tape-like article that is wound to form the coil. In other words, it can be provided that the coil has a terminal and / or initial fin in which only the two overlapped separator tapes are present.

[0204] For this and other purposes, an accumulation device (not shown in the figures) configured to accumulate an amount of at least one of said plurality of tapes Nl, N2, N3, N4 or the generic tape 80 may be provided.

[0205] According to preferred embodiments such as the one shown, for example, in Figure 4, the tape 80 (generic example of characteristics also common to the plurality of tapes Nl, N2, N3, N4 as argued above) comprises a main body having main extension according to its longitudinal direction L.

[0206] It can be noted that when the actual feed path of the tape 80 can be overlapped with the predefined feed path PA, then the longitudinal direction L substantially coincides with the predefined feed path PA. Again with reference to Figures 1 and 2, it can be noted that the supply unit 700 preferably comprises a movable portion 750 configured to move in reciprocating motion along its own displacement direction d preferably substantially parallel to a portion of the predefined feed path PA. In other words, the movable portion 750 is configured to be able to displace with respect to the feed of the tape 80 (or the plurality of the tapes Nl, N2, N3, N4) thus causing a relative feed acceleration or slowdown. It is interesting to note that in the event that the movable portion 750 advances by exactly the same amount as the tape 80 (or of the tapes Nl, N2, N3, N4), a condition of relative speed equal to zero is created, i.e. a "moving stop" condition in which the movable portion 750 and the tape 80 (or the plurality of tapes Nl, N2, N3, N4) are "stationary" to each other although in motion with respect to an external reference system. This configuration makes it possible to perform specific tasks that would normally require interrupting the feed of the tape (e.g. selective retention and movement by grippers of a portion of the tape, cutting a tape into two parts, etc.) continuously without ever blocking the feed of the tape.

[0207] In other words, when the movable portion 750 moves from an initial position and advances along the predefined feed path PA according to substantially the direction d with a speed equal to that of the tape 80, it is able to create a kind of buffer condition of the tape which can then be advantageously recovered as required simply by returning the movable portion 750 to its initial position by means of a displacement in the opposite direction to the feed of the tape 80.

[0208] In the preferred embodiment shown in Figure 2, the movable portion 750 moves by pure translation in an alternating manner in the direction d, which is inclined at 45° with respect to the vertical.

[0209] In alternative embodiments, the movable portion 750 can move in different directions, e.g. horizontally.

[0210] In further embodiments pertaining to the present invention, such an alternating translation movement of the movable portion 750 is replaceable by a more complex law of motion comprising a first forward tract (e.g. horizontal), a second displacement tract (e.g. vertical) a third backward displacement tract (e.g., horizontal, equal in modulus to the first horizontal feed tract but opposite in direction), and a fourth displacement tract (e.g., vertical, equal in modulus to the second vertical displacement tract but opposite in direction) enabling the movable portion 750 to return to its initial starting point once the intended law of motion has been completed, thereby realising a closed path.

[0211] In some embodiments such as the one shown in figure 2, the tape N1 is a conductor tape oriented along the supply unit 700 substantially parallel to the displacement direction d of the movable portion 750. In an alternative embodiment of the present invention not shown in the figure, the displacement direction d of the movable portion 750 is horizontal and corresponds to the orientation of the conductor tape N3 along the supply unit 700.

[0212] The movement of the movable portion 750 is carried out by motorised displacement devices not shown in the figures, which preferably comprise rails or slides, moved by means of tapes or racks.

[0213] The movable portion 750 comprises at least one alignment device 100;200 constrained to it and configured to align the tape 80 to the predefined feed path PA.

[0214] In more detail and still with reference to Figure 2, the movable portion 750 comprises a movable input section 751 from which the tape 80 or the plurality of tapes Nl, N2, N3, N4, which will then be wound to form the coil B by the winding unit 600, enter.

[0215] Preferably, the winding unit 600 comprises three winding heads 610 that can be moved by rotation with respect to the movable portion 750.

[0216] In preferred embodiments, each of the winding heads 610 allows for efficient and continuous winding of the tape 80 or the tape-like article N to form the desired coil B. It is interesting to note that the plurality of winding heads 610 allows for the continuous winding of coils B without having to stop the feeding of the tape 80.

[0217] For the sake of completeness, reference is now made to the example in Figure 5 to show how the first alignment device 100 is configured to move the tape 80 so as to align a portion of reference 81a of the tape 80 with respect to a reference 81b of the apparatus 1000. According to preferred embodiments, the reference portion 81a is, for example, advantageously a lateral edge of the main body 81 or a creasing edge from which a plurality of fins 82 of the tape 80 project. This technical solution can be advantageously applied to all types of alignment devices described herein.

[0218] Again with reference to Figure 5, it can be seen that the alignment system 1 comprises a first alignment sensor 150, operatively associated with the first alignment device 100, and configured to detect and correct, by selectively actuating the first alignment device 100, a first misalignment condition AAII1 between the tape 80 and the predefined feed path PA.

[0219] The reference 81b is a spatial point identified at the first alignment sensor 150. Preferably, the first alignment sensor 150 can be an optical sensor, photo / video camera, or similar technical solution.

[0220] Furthermore, the set reference can be a point, or a spatial segment or other specifically predefined geometric elements.

[0221] In the embodiment shown in Figure 1, the alignment system 1 comprises several pluralities of alignment devices cooperating with each other: a plurality of the first alignment device 100, a plurality of a second alignment device 200, a plurality of a third alignment device 300 and a plurality of a fourth alignment device (coinciding, in this example, with the previously mentioned mobile coil holders).

[0222] Advantageously and as depicted in Figure 2, the different pluralities of first and second alignment devices 100, 200 are both installed in the movable portion 750.

[0223] Specifically, Figure 2 shows two first alignment devices 100 placed immediately upstream of the winding unit 600 and each acting on one of the two conductor tapes Nl, N3.

[0224] Additionally, the embodiment in Figure 2 comprises four second alignment devices 200 placed upstream of the two first alignment devices 100 in the vicinity of the movable entry section 751 and each acting on one of the tapes Nl, N2, N3, N4. Each second alignment device 200 of the tape 80 is configured to displace it so as to align it according to the predefined feed path PA.

[0225] The alignment system 1 comprises a second alignment sensor 250 operatively associated with each of the second alignment devices 200 and configured to detect and correct, by selectively actuating the respective second alignment device 200, a second misalignment condition AAII2 (not shown in the figure, but similar to the first misalignment condition AAII1) between the tape 80 and the predefined feed path PA.

[0226] As can be seen in Figures 3 and 4, the first alignment device 100 is configured to move the tape 80 to align it with the predefined feed path PA by translation of the tape 80 itself according to a translation direction DT transverse to the predefined feed path PA.

[0227] Similarly to what has been described above, the desired alignment is performed by displacing the reference portion 81a of the tape 80 to the desired position relative to the reference 81b.

[0228] More specifically, the alignment device 100 comprises a translation unit 110 comprising in turn a first frame 115 and a second frame 116.

[0229] As can be noted from Figures 3 and 4, a first roller 111 and a second roller 112 are arranged in the first frame 115, rotating about a first and second longitudinal axis 11 IX, 112X, respectively, which are housed so as to be placed side by side and spaced apart from each other so as to engage the tape 80 between them along the predefined feed path PA.

[0230] The first and second rollers 111, 112 are preferably made of polymer or metal material.

[0231] It can be noted that the first frame 115 is translatable with respect to the supply unit 700 according to the translation direction DT having a component parallel to the first and second longitudinal axis 111X, 112X.

[0232] With reference to Figure 4, it can be seen how in this preferred embodiment, the translation direction DT is substantially parallel to the first and second longitudinal axes 111X, 112X.

[0233] As can be noted in Figures 3 and 6, the second frame 116 is integrally constrained to the movable portion 750 (e.g. by means of screws). In particular, as shown in Figure 4, the second frame 116 comprises a base 116a provided with through holes adapted to allow the fixing by screws to the movable portion 750 and a main plate 116b projecting perpendicularly from the base 116a.

[0234] With reference to Figures 8 and 9, it can be noted that on the main plate 116b of the second frame 116, a rail 116c of linear form is integrally constrained.

[0235] Such a rail preferably has an hourglass or H-shaped cross-section and is configured so that a slide 115c can slide on it in a reversible manner.

[0236] Considering now Figure 9, it can be seen that the rail 116c and the slide 115c cause the first frame 115 to be able to move relative to the second frame 116 according to a pure translation motion along the translation direction DT.

[0237] With reference to Figures 4, 6 and 7, the first roller 111 is operatively connected to a second motor element 114a so as to be actuatable in rotation about the first longitudinal axis 111X.

[0238] Preferably, the motor element 114a is a stepper or brushless electric motor and the first roller 111 is directly coaxially connected to its drive shaft.

[0239] In this way it is possible to selectively actuate the first roller 111 in rotation in order to decide how fast to feed the tape 80 when present.

[0240] Now with reference to Figure 3, it can be noted that the second roller 112 is constrained to the first frame 115 by means of an idle joint or unidirectional joint 117 with an allowed idle rotation or rotation in one direction only about the second longitudinal axis 112X.

[0241] In the embodiment shown in Figures 3 and 7, the second roller 112 is constrained with an allowed rotation to a bracket 118b. This bracket 118b is in turn constrained with an allowed translation to the first frame 115 and is configured to reversibly displace itself between a close position PR. (depicted in Figure 3), in which the second roller 112 is at a minimum distance from the first roller 111, and a spaced-apart position PD (depicted in Figure 6), in which the second roller 112 is at a maximum distance from the first roller 111.

[0242] With reference to Figures 6 and 7, it can be noted that the first and second rollers 111, 112 are spaced apart from each other, resulting in an interposed first opening 118a that can vary depending on the position of the second roller 112. Preferably, this first opening 118a is not equal to zero and is determined according to the thickness of the tape 80 to be treated.

[0243] As shown in Figures 7 and 8, the bracket 118b is moved so that the second roller reversibly translates between the close position and the spaced-apart position by means of an actuator 115b constrained to it and driven in displacement by means of a further motor element 114b which in the case depicted is an electric stepper motor (or, alternatively, brushless).

[0244] It is interesting to note that when the second roller 112 is in a position PD spaced apart from the first roller 111, it is easier to insert an initial end or head or appendage of tape 80 between them. Such a condition may arise, for example, after a coil B has been completed and a new end of the tape 80 has to be brought efficiently and easily to the winding head 610.

[0245] Once the initial end of the tape 80 has passed downstream of the first and second rollers 111, 112, it is possible to move the second roller 112 to the close PR. position, bringing both rollers 111, 112 into contact on the tape 80.

[0246] At this point, the tape 80 is effectively engaged between the two rollers 111, 112 and a translation thereof in the translation direction DT immediately results in a consistent translation of the portion of tape 80 engaged therein.

[0247] Even more, once the tape 80 is engaged between the first and second roller 111, 112 it will be possible to effectively feed it selectively by rotating the electric stepper or brushless motor 114 connected to the first roller 111.

[0248] Now with reference to Figure 5, it can be seen that in the embodiment shown there is also the presence of a first position sensor 180. This position sensor 180 is preferably positioned so as to be able to detect a displacement of the first alignment device 100, and in particular, for example, a translation along the translation direction DT of the first frame 115 with respect to the second frame 116.

[0249] It is important to note that the first position sensor 180 is configured to detect a first position Pl of the first alignment device 100.

[0250] Preferably, the first position sensor 180 is of the photoelectric, magnetic, RGB type, configured for image acquisition, encoder, ad ultrasonic, infrared or vision systems. The information collected by the first alignment sensor 150 and the first position sensor 180 is processed by a processing unit 800 (shown schematically in Figures 1 and 5) in order to assess the conditions under which the apparatus is operating.

[0251] More precisely, thanks to the first alignment sensor 150 it is possible to determine a possible misalignment condition between the tape 80 and the predefined feed path PA, whereas thanks to the first position sensor 180 it is possible to define a nominal operating condition ONI of the first alignment device 100.

[0252] In other words, by means of the first position sensor 180, it is possible to assess whether the first alignment device 100 is working under conditions considered acceptable (or standard) while correcting any misalignments, or whether it is forced to apply alignment corrections that risk being ineffective and / or excessively wearing the device itself.

[0253] These ideal conditions (or positions) of the first alignment device are precisely identified within the first nominal operating condition ONI.

[0254] This first nominal operating condition ONI may, for example, provide for the first alignment device 100 to be able to move ± 60mm from a reference point, preferably ± 40mm, more preferably ± 20mm.

[0255] When the first alignment device 100 is implementing its first actual operating condition OE1 and is forced to move further out of the first nominal operating condition ONI in order to try to correct the detected misalignment, the first position sensor 180 signals this by providing information to the processing unit 800 that a second actual operating condition OE2 of the second alignment device 200 is to be modified at this point so as to bring the first actual operating condition OE1 back within the first nominal operating condition ONI.

[0256] It is now clear that thanks to this innovative technological approach, it is possible to reduce the workload of the alignment device 100 by modifying its second actual operating condition OE2 while ensuring that it also remains within its second actual operating condition OE2.

[0257] In other words, it is significant to note that the Applicant envisioned a technical solution whereby the first position sensor 180 related to the operation of the first alignment device 100 could induce a change in the operating conditions of another alignment device.

[0258] Briefly recalling Figures 1 and 2, it can be seen that the second alignment device 200 is preferably positioned upstream, according to the predefined feed path PA, with respect to the first alignment device 100.

[0259] In other words, when the first position sensor 180 detects a first position Pl for which the first actual operating condition OE1 is outside the first nominal operating condition ONI, the second actual operating condition OE2 of the second alignment device 200, which is acting on the tape 80 before it comes into contact with the first alignment device 100, is modified. This configuration denotes interesting advantages and process benefits.

[0260] A preferred example of the second alignment device 200 is now shown in Figure 10.

[0261] Preferably, the second alignment device 200 is configured to perform the alignment between the tape 80 and the predefined feed path PA by rotation of the tape 80 itself.

[0262] Also in the case of the second alignment device 200 shown in Figure 2, the tape 80 is moved so as to align its reference portion 81a with respect to the reference 81b of the apparatus 1000.

[0263] In this case, the desired displacement takes place preferably via a rotation of the reference portion 81a about a transverse axis, preferably perpendicular, to the predefined feed path PA.

[0264] With reference to Figures 10 and 11, it can be noted that the alignment device 200 comprises a rotation unit 210 including an aligning roller 220 configured to rotate about its first longitudinal axis 220X so as to be in contact with the tape 80. Further, the second alignment device 200 comprises a body 230 (shown in detail in Figure 15) preferably integrally constrained to the movable portion 750 and on which there is housed a rotation member 232 configured to rotate the aligning roller 220 about a rotation axis 220Y substantially perpendicular to the first longitudinal axis 220X.

[0265] As can be noted from Figure 10, the aligning roller 220 is configured so that its projection 220P on a reference plane XZ, perpendicular to the rotation axis 220Y, intersects the rotation axis 220Y itself and the projection 232P of the rotation member 232 on the reference plane XZ. In more detail, it can be seen that the aligning roller 220, having an substantially cylindrical shape, projects an substantially rectangular outline onto the reference plane XZ, while the reference member 232 projects an substantially circular outline onto the reference plane XZ. These elements will be described more fully below.

[0266] Preferably, the rotation axis 220Y is positioned substantially equidistant from the bases of the aligning roller 220.

[0267] With reference to Figures 13 and 14, it can be noted that the rotation member 232 comprises a fixed component 232a integrally constrained to the body 230 (and thus to the movable portion 750) and a movable component 232b constrained to the aligning roller 220 and selectively displaceable relative to the fixed component 232a so as to allow the rotation of the aligning roller 220 about the rotation axis 220Y.

[0268] More particularly, the rotation member 232 preferably comprises a pin associated with a rotating bearing 232b and a box-like body 232a configured to rotate said aligning roller 220 about said rotation axis 220Y. Specifically, as shown in more detail in Figure 13, in this embodiment, the fixed component is represented by the body 230 to which the external wall of the rotating bearing 232a is integrally constrained, while the movable component is represented by the pin 232b integrally constrained to the internal wall of the rotating bearing with free rotation about the rotation axis 220Y thanks to the balls interposed between the internal wall and the external wall of the bearing itself.

[0269] Alternative embodiments to those mentioned above involve a joint or hinge or a curved guide and slide as the respective combinations of fixed 232a and movable 232b components.

[0270] It is interesting to note that the fixed component 232a comprises a first and a second abutment surface 232al, 232a2, intended to receive at least in part the forces acting on the movable component 232b during use, and in particular rotation about the rotation axis 220Y, of the aligning roller 220.

[0271] In fact, with reference to Figure 13, it can be seen that the outer wall 232al of the rotating bearing (integrally constrained to the housing 230) is intended to provide the abutment for the forces applied on the aligning roller 220 and having radial components with respect to the rotation axis 220Y, while the upper wall of the rotating bearing (in contact with the lower wall of the pin 232b) is intended to provide the abutment for the forces applied on the aligning roller 220 and having components parallel to the rotation axis 220Y. In particular, it is noted that the pin 232b is integrally constrained on ends opposite to two respective rods (or arms or plates) 231 so that the bearing (or the plurality of bearings if present) acts as an abutment for both possible directions of actuation of the forces applied on the aligning roller 220 having components parallel to the rotation axis 220Y

[0272] It is noted that the first abutment surface 232al, in order to provide such an abutment with respect to the forces applied on the aligning roller 220 and having radial components with respect to the rotation axis 220Y, extends along the direction of said rotation axis 220Y for at least 5mm while the second abutment surface 232a2 extends in a direction substantially perpendicular to the rotation axis 220Y.

[0273] Figure 11 shows that the tape 80 is preferably interposed between the aligning roller 220 and the rotation member 232.

[0274] Further preferably, the tape 80 is partially wound around the aligning roller 220 for at least 90°, more preferably for an angle subtended at the centre of the aligning roller 220 comprised between 150° and 180°. In these configurations it is

[0275] With reference to Figures 11, 13 and 14, it can be noted that each rod (or arm or plate) of the pair of rods 231 is integrally constrained in proximity to its first end 231a to an upper and lower portion of the movable component, respectively.

[0276] Furthermore, the aligning roller 220 is constrained with an allowed rotation in proximity to a second end 231b, opposite the first end 231a, of the upper rod 231. Preferably, the rods 231 are substantially slab-shaped and are integrally constrained to the pin 232b by a plurality of screws or similar clamping devices.

[0277] It can be noted from Figure 15 that the body 230 preferably has a substantially parallelepiped shape comprising a seat 236 shaped to receive the pair of rotating bearings 232a and the pin 232b. In this case, it can be noted that the seat 236 has a substantially cylindrical shape and is positioned at one end of the body 230.

[0278] According to a preferred embodiment, the body 230 develops about the seat 236 with substantially uniform thickness, thus presenting a rounded end close to the seat 236.

[0279] Still with reference to Figure 11, the body 230 comprises a central hole 237 which passes through in a direction parallel to the rotation axis 220Y and has a preferably substantially rectangular cross-section.

[0280] In addition, the body 230 comprises a cavity 239 ending above and below in a pair of oblong openings 238 positioned in proximity to the end opposite to that in which the seat 236 is located and shaped to guide the displacement of the pair of rods 231 during their rotation.

[0281] The cavity 239 appears to be communicating with the outside of the body 230 not only at the pair of oblong openings 238 but also through a further lateral opening.

[0282] Now with reference to Figures 13 and 14, it can be noted that the pin 232b housed in the seat 236 is constrained to the pair of rods 231 both above and below at the first end 231a of each rod.

[0283] In the embodiment shown as an example in Figure 13, the upper rod has the two opposing surfaces with greater extension on which the pin as the first rotating element 231 on the lower surface and the aligning roller 220 on the upper surface are respectively constrained.

[0284] With reference to Figure 13, the pair of rods 231 hinged on the pin 231 are substantially identical in shape and extension and are integrally constrained together by means of a spacer 240 (in this example in the form of a ring) placed in contact with the lower face of the upper rod and the upper face of the lower rod, respectively. The constraint between the pair of rods 231 and the ring (or spacer) 240 is preferably made by means of screws as shown in Figure 13.

[0285] This rod-pair (or double-arm) configuration serves to increase the rigidity of the rotating support through which the aligning roller 220 is placed in rotation, thus conferring less deformability on the alignment device 205.

[0286] It is interesting to note, with reference to Figure 15, that the central hole 237 of the body 230 is shaped to accommodate the spacer 240 and to allow it to move freely within it while the pair of rods 231 performs a rotation about the rotation axis 220Y less than or equal to about 10° in absolute value, more preferably less than or equal to about 4° in absolute value.

[0287] Still with reference to Figure 14, it can be noted that the second alignment device 200 comprises a motor element 234 with a drive shaft 235a rotatable about its longitudinal axis.

[0288] Preferably, the motor element 234 is an electric stepper motor, brushless or similar technical solution.

[0289] With reference to Figure 14, it can be noted that the drive shaft 235a is realised as a trapezoidal screw, preferably a recirculating ball screw, and housed within the cavity 239 ending in the pair of oblong openings 238 formed in the body 230. In more detail, it can be noted that the trapezoidal screw 235a, preferably a recirculating ball screw, is inserted into the cavity 239 passing through the aforementioned further side opening.

[0290] According to one embodiment, a flanged nut 235b is housed on the trapezoidal screw 235a, preferably with recirculating balls. Said flanged nut 235b further comprises an upper and a lower tooth projecting vertically and from opposite sides from its outer surface.

[0291] From figures 14 and 15, it can be noted that each oblong opening 238 of the body 230 is configured to have the largest dimension aligned with the longitudinal axis of the trapezoidal screw 235a so that the upper and lower teeth of the flange nut 235b can move freely within them while the flange nut 235b slides on the trapezoidal screw 235a.

[0292] Further and again with reference to figures 13 and 14, it can be noted that the pair of rods 231 comprises in proximity to each second end 231b a respective pair of seats 235c each configured to receive and engage by shape interference with a respective tooth of the flanged nut 235b. Preferably, a respective bearing is interposed between each tooth and the respective seat 235c engaging by interference fit.

[0293] In this way it is possible, by driving the motor element 234 and consequent rotation of the trapezoidal screw 235a, to selectively rotate the pair of rods 231 about the rotation axis 220Y. As shown in figure 14 the electric motor 234 can be mounted in a preferred orientation, for example perpendicular with respect to the rotation axis 220Y, or, according to embodiments not shown in the figures, vertically by aligning the motor shaft 235a with the rotating member 232 (i.e. in the example considered the combination of the pair of bearings and the coaxial pin) thus arranging the motor shaft 235a vertically.

[0294] As can be noted from Figures 10, 11, 12, 13 and 14, the aligning roller 220 is constrained to the upper rod at its second end 231b by means of a rigid support preferably in the form of a square. Preferably, the bracket is designed in such a way as to determine a sufficient opening width for fins 219.

[0295] Depending on the preferred embodiment, the aligning roller 220 is constrained to the rigid support with an allowed rotation about the longitudinal axis 220X by means of a joint, an unidirectional joint or selectively actuatable in rotation by means of a motor element (not shown in the figures).

[0296] The aligning roller 220 comprises an outer surface that is intended for contact with the tape 80. With particular reference to Figure 12, it can be noted that the rotation axis 220Y is preferably tangent to the outer surface of the aligning roller 220. Even more preferably, the rotation axis 220Y is tangent to the outer surface of the aligning roller 220 and equidistant from the bases of the roller.

[0297] In preferred embodiments, the aligning roller 220 is made of polymer or metal.

[0298] Preferably, the pair of rods 231 and the body 230 of the alignment device 205 are made of steel.

[0299] Further, figure 10 shows a possible reference 81b of the aligning roller 220 positioned in proximity to an end thereof.

[0300] Now with reference to Figure 11, it can be noted that the second alignment device 200 is preferably interposed between two further rollers guiding the tape 80 along the predefined feed path PA, these two further rollers being substantially aligned with each other, preferably horizontally, and offset from the aligning roller 220 so that the predefined feed path PA of the tape 80 imposed by these three rollers defines a trajectory similar to an inverted "U" or "Q".

[0301] In this operating condition, the tape 80 is in contact with the outer surface of the aligning roller 220 for a distance subtended by an angle at the centre of the aligning roller 220 equal to about 180°. In alternative embodiments not shown in the figures, this angle at the centre can be comprised between 90° and 270°.

[0302] Still with reference to Figure 11, it can be noted that the tape 80 preferably initiates the contact with the aligning roller 220 in a direction that is parallel to the rotation axis 220Y.

[0303] In other words, the tape 80 is fed to the second alignment device 200 in a feed direction DA substantially parallel to the rotation axis 220Y.

[0304] Figure 12 shows the presence of the second alignment sensor 250 together with the second position sensor 280. These sensors perform equivalent functions of the corresponding first alignment sensor 150 and first position sensor 180.

[0305] More specifically, the second position sensor 280 is preferably positioned to detect a displacement of the second alignment device 200, and in particular, for example, a rotation of the alignment roller 220 about the rotation axis 220Y.

[0306] It is important to note that the second position sensor 280 is configured to detect a second position P2 of the second alignment device 200.

[0307] Preferably, the second position sensor 280 is of the photoelectric, magnetic, RGB type, configured for image acquisition, encoder, ad ultrasonic, infrared or vision systems.

[0308] The information collected by the second alignment sensor 250 and the second position sensor 280 is processed by the processing unit 800 in order to assess the conditions under which the apparatus is operating.

[0309] More precisely, thanks to the second alignment sensor 250, it is possible to determine a possible misalignment condition between the tape 80 and the predefined feed path PA, whereas thanks to the second position sensor 280, it is possible to define a second actual operating condition OE2 of the second alignment device 200. In other words, by means of the second position sensor 280, it is possible to assess whether the second alignment device 200 is working under conditions considered acceptable (either nominal or standard) while correcting any misalignments, or whether it is forced to apply alignment corrections that risk being ineffective and / or excessively wearing the device itself.

[0310] These ideal conditions (or positions) of the second alignment device 200 are precisely identified within the second nominal operating condition ON2.

[0311] This second nominal operating condition ON2 can, for example, provide that the second alignment device 200 can rotate about the rotation axis 220Y by ± 30°, preferably ± 20°, plus preferably ± 10° with respect to a reference position.

[0312] Two conditions under which the second alignment device 200 can operate are described below.

[0313] In the first case, the first position sensor 180 is considered to have detected that the first alignment device 100 is operating outside the first nominal operating condition ONI. In this case, the processing unit 800 sends instructions that force the second alignment device 200 to modify its second actual operating condition OE2 in order to facilitate the intended correction of the first alignment device 100.

[0314] For example, if the first alignment device 100 is operating in a first actual operating condition OE1 of +25mm with a first nominal operating condition ONI of ±20mm, then the second alignment device 200 changes its second actual operating condition OE2 from + 3° to + 7° . In this example case, the second nominal operating condition ON2 is set as ± 10° so that the modified value of the second actual operating condition OE2 still falls within the predetermined nominal operating condition ON2.

[0315] Clearly, this example has no limiting value and serves only to facilitate the intelligence of a system according to the present invention.

[0316] It will be possible for a person skilled in the art to adjust the desired correction values according to the preferred types of alignment devices, the timing of tape position correction, etc. In the second case, when the second alignment device 200 is implementing its second actual operating condition OE2 and is forced to move further out of the second nominal operating condition ON2 in order to try to correct the detected misalignment, the second position sensor 280 signals this by providing information to the processing unit 800 that a third actual operating condition OE3 of a third alignment device 300 is being modified at this point so as to bring the second actual operating condition OE2 back within the second nominal operating condition ON2.

[0317] It is very interesting to note that this second case described, in which the second alignment device 200 is supported by the contribution of the third alignment device 300, can also be implemented in the same condition as the first case described above.

[0318] In other words, assuming, for example, that the third alignment device 300 is of the same type as the second alignment device 200, the Applicant was able to find a technical solution whereby the second alignment device 200 can move by an angle of +5° (instead of +7°) and the third alignment device 300 changes its third operating condition OE3 from, for example, -1° to +1°.

[0319] All of these examples are intended to describe an innovative collaborative tape alignment correction system in which the intervention logic is advantageously distributed over a plurality of alignment devices all operating on the same tape (or similar element).

[0320] Briefly recalling Figures 1 and 2, it can be seen that the second alignment device 200 is preferably positioned upstream, according to the predefined feed path PA, with respect to the first alignment device 100.

[0321] In other words, when the first position sensor 180 detects a first position Pl for which the first actual operating condition OE1 is outside the first nominal operating condition ONI, the second actual operating condition OE2 of the second alignment device 200, which acts on the tape 80 before it comes into contact with the first alignment device 100, is modified. This configuration denotes the additional interesting process advantages and benefits discussed above.

[0322] Preferably, the second position sensor 280 is of the photoelectric, magnetic, RGB type, configured for image acquisition, encoder, ad ultrasonic, infrared or vision systems. With reference to Figure 1, it can be seen that the third alignment device 300 is preferably positioned upstream of the second alignment device 200 and outside the movable portion 750.

[0323] Advantageously, a third alignment device 300 is provided for each tape Nl, N2, N3, N4. The third alignment device 300 is preferably of the same type as the first or second alignment device 100, 200 and is operatively connected to the processing unit 800.

[0324] Consistent with the above, in some embodiments it is also envisaged that the third alignment device 300 includes a third alignment sensor 350 and a third position sensor 380 (not shown in the figures) operatively connected to the processing unit 800.

[0325] Similarly, and again with reference to Figure 1, the apparatus 1000 comprises a fourth alignment device 400 preferably positioned upstream of the third alignment device 300 and operatively connected to the processing unit 800.

[0326] More specifically, the fourth alignment device 400 is a coil-holder dispensing device configured to move by translation, similar to the first alignment device 100, or by rotation.

[0327] Also in this case, the collaborative actuation logic is the same as described above and provides that, if the third position sensor 380 detects a different actual operating condition OE3 from the nominal operating condition ON3, instructions are sent from the processing unit 800 so as to modify the fourth actual operating condition OE4 of the fourth alignment device 400 so as to support the third alignment device 300 in order to modify the third actual operating condition OE3 and bring it back within the third nominal operating condition ON3.

[0328] Clearly, this process can also be actuated when the exit from the nominal operating condition occurs for the first and / or second device 100,200.

[0329] In fact, it is interesting to note that, thanks to this technical solution, the Applicant acquires the freedom to advantageously decide, depending on the detected misalignment, which alignment device to activate further.

[0330] For example, for programming logic, the Applicant might prefer that at certain values or types of misalignment detected at the first alignment device 100 the third and fourth alignment devices 300, 400 be activated, while for other entities only, for example, the second and possibly the third alignment device 200, 300.

[0331] Even more interestingly, the Applicant noted that it is also possible to determine different periods in which different types of collaboration between multiple alignment devices can be implemented, so that, for example, in an initial correction phase three alignment devices can be activated at the same time, while once the misalignment has been reduced, this activity can be handled by only two alignment devices. Obviously, a person skilled in the art may, in order to meet specific and contingent application requirements, make further modifications and variants to the above-described invention, all falling within the scope of protection as defined by the following claims.

Claims

CLAIMS1. Alignment system (1) for a tape (80) adapted to create an internal assembly (3) for an electrochemical cell intended for battery production, comprising:-a first alignment device (100) configured to move said tape (80) so as to align it according to a predefined feed path (PA) of said tape (80) and operating with a first actual operating mode (OE1),-a second alignment device (200) of said tape (80), configured to move said tape (80) so as to align it according to said predefined feed path (PA) and operating with a second actual operating mode (OE2), -a first alignment sensor (150) configured to detect a first misalignment condition (AAII1) between said tape (80) and said predefined feed path (PA) and operatively associated with said first alignment device (100) via a processing unit (800) so that said first alignment device (100) corrects said first misalignment condition (AAII1),-a second alignment sensor (250) configured to detect a second misalignment condition (AAII2) between said tape (80) and said predefined feed path (PA) and operatively associated with said second alignment device (200) via said processing unit (800) so that said second alignment device (200) corrects said second misalignment condition (AAII2),- a first position sensor (180) configured to detect a first position (Pl) of said first alignment device (100) and operatively connected to said second alignment device (200) via said processing unit (800), wherein said second alignment device (200) is configured to adjust said second actual operating mode (OE2) according to instructions received from said processing unit (800) related to what was detected by said first position sensor (180).

2. Alignment system (1) according to the preceding claim, wherein said second alignment device (200) is placed upstream, relative to said predefined feed path (PA), of said first alignment device (100).

3. Alignment system (1) according to claim 1 or 2, wherein said second alignment device (200) is a dispensing device (6) of said tape (80)moveable according to different orientations relative to said predefined feed path (PA).

4. Alignment system (1) according to any one of the preceding claims, comprising:- a third alignment device (300) of said tape (80), configured to move said tape (80) so as to align it according to said predefined feed path (PA) and operating according to a third actual operating mode (OE3), -a third alignment sensor (350) of said tape (80) configured to detect a third misalignment condition (AAII3) between said tape (80) and said predefined feed path (PA) and operatively associated with said third alignment device (300) via said processing unit (800) so that said third alignment device (300) corrects said third misalignment condition (AAII3),-a second position sensor (280) configured to detect a second position (P2) of said second alignment device (200) and operatively connected to said third alignment device (300) via said processing unit (800), wherein said third alignment device (300) is configured to adjust said third actual operating mode (OE3) according to instructions received from said processing unit (800) related to was what detected by said second position sensor (280).

5. Alignment system (1) according to the preceding claim, wherein said third alignment device (300) is placed upstream, relative to said predefined feed path (PA), of said second alignment device (200).

6. Alignment system (1) according to claim 4 or 5, wherein said first and / or second position sensors (180, 280) are / is of the photoelectric, magnetic, RGB type, configured for image acquisition, encoder, ultrasonic, infrared or vision systems.

7. Apparatus (1000) for creating an internal assembly (3) for an electrochemical cell intended for battery production, comprising:- a dispensing unit (2) for dispensing at least one tape (80) along a predefined feed path (PA),- an alignment system (1), placed downstream of said dispensing unit (2) according to said predefined feed path (PA), having the characteristics of one of claims 1 to 6,- a coupling unit (600), placed downstream of said alignment system (1) according to said predefined feed path (PA), configured to combine a plurality of conductor elements (7, 8) and at least one separator element (9), in a predefined structure so as to form said internal assembly (3) of said electrochemical cell, wherein said tape (80) is at least one of said conductor elements (7, 8) and said at least one separator element (9).

8. Apparatus (1000) according to one of the preceding claims, comprising:- a movable portion (750) configured to reversibly move along a displacement direction (d) between a first configuration distal to said dispensing unit (2) and a second configuration proximal to said dispensing unit (2), wherein said movable portion (750) comprises one or more of said first or second alignment devices (100, 200).

9. Apparatus (1000) according to claim 7 or 8, wherein:- said tape (80) is a separator tape,- said internal assembly (3) of said electrochemical cell is a structure formed by a stack of conductor foils individually separated by said separator tape,- said coupling unit (600) is a stacking unit of said conductor foils separated by said separator tape.

10. Apparatus (1000) according to claim 7 or 8, wherein:- said tape (80) is a separator tape cut into a plurality of separator foils,- said internal assembly (3) of said electrochemical cell is a multilayer structure of said separator foils alternating with a plurality of conductor foils,- said coupling unit (600) is a stacking unit of said plurality of conductor foils and said plurality of separator foils to create said internal assembly (3).

11. Apparatus (1000) according to claim 7 or 8, wherein:said tape (80) is at least one of a plurality of tapes (Nl, N2, N3, N4) comprising a pair of conductor tapes and a pair of separator tapes,- said internal assembly (3) of said electrochemical cell is a coil (B) consisting of said conductor tapes and said separator tapes,- said coupling unit (600) is a winding unit of said pair of conductor tapes and said pair of separator tapes.

12. Method for aligning a tape (80), the latter intended for creating an internal assembly (3) of an electrochemical cell for battery production, comprising:- Dispensing said tape (80) along a predefined feed path (PA),- -Setting up a first and a second alignment device (100, 200) configured to move said tape (80) so as to align it according to said predefined feed path (PA),- Defining a first and second nominal operating condition (ONI, ON2) of said first and second alignment device (100, 200), respectively,- Identifying a first and a second actual operating condition (OE1, OE2) of said first and second alignment device (100, 200), respectively,- -In the event that said first actual operating condition (OE1) is not within said first nominal operating condition (ONI), modifying said second actual operating condition (OE2), keeping it within said second nominal operating condition (ON2), so as to bring said first actual operating condition (OE1) within said first nominal operating condition (ONI).

13. Method according to the preceding claim, comprising:- arranging a first alignment sensor (150) configured to detect a first misalignment condition (AAII1) between said tape (80) and said predefined feed path (PA) and operatively associated with said first alignment device (100) via a processing unit (800),- selectively actuating said first alignment device (100) so as to adjust said first misalignment condition (AAII1) according to instructions received from said processing unit (800) related to what was detected by said first alignment sensor (150).

14. Method according to claim 12 or 13, wherein:- said identifying said first actual operating condition (OE1) is performed by means of a first position sensor (180) configured to detect a first position (Pl) of said first alignment device (100) and operatively connected to said second alignment device (200) via said processing unit (800),- said modifying said second actual operating condition (OE2) of said second alignment device (200) is performed according to instructions received from said processing unit (800) related to what was detected by said first position sensor (180).

15. Alignment system (1) for a tape (80) adapted to create an internal assembly (3) for an electrochemical cell intended for battery production, comprising:- a first alignment device (100) configured to move said tape (80) so as to align it according to a predefined feed path (PA) of said tape (80),- a first alignment sensor (150) configured to detect a first misalignment condition (AAII1) between said tape (80) and said predefined feed path (PA) and operatively associated with said first alignment device (100) via a processing unit (800) so that said first alignment device (100) corrects said first misalignment condition (AAII1),- a first position sensor (180) configured to detect a first position (Pl) of said first alignment device (100).

16. Alignment system (1) according to the preceding claim, wherein said first position sensor (180) is of the photoelectric, magnetic, RGB type, configured for image acquisition, encoder, ultrasonic, infrared or vision systems.

17. Apparatus (1000) for creating an internal assembly (3) for an electrochemical cell intended for battery production, comprising:- a dispensing unit (2) for dispensing at least one tape (80) along a predefined feed path (PA),- an alignment system (1), placed downstream of said dispensing unit (2) according to said predefined feed path (AP), having the characteristics of one of claims 15 to 16,- a coupling unit (600), placed downstream of said alignment system (1) according to said predefined feed path (PA), configured tocombine a plurality of conductor elements (7, 8) and at least one separator element (9), in a predefined structure so as to form said internal assembly (3) of said electrochemical cell, wherein said tape (80) is at least one of said conductor elements (7, 8) and said at least one separator element (9).

18. Apparatus (1000) according to the preceding claim, comprising- a movable portion (750) configured to reversibly move along a displacement direction (d) between a first configuration distal to said dispensing unit (2) and a second configuration proximal to said dispensing unit (2), wherein said movable portion (750) comprises said first alignment device (100).

19. Apparatus (1000) according to the preceding claim, wherein said alignment system (1) comprises:-a second alignment device (200) of said tape (80), configured to move said tape (80) so as to align it according to said predefined feed path (PA) and operating with a second actual operating mode (OE2),-a second alignment sensor (250) configured to detect a second misalignment condition (AAII2) between said tape (80) and said predefined feed path (PA) and operatively associated with said second alignment device (200) via said processing unit (800) so that said second alignment device (200) corrects said second misalignment condition (AAII2),- said first position sensor (180) being operatively connected to said second alignment device (200) via said processing unit (800), wherein said second alignment device (200) is configured to adjust said second actual operating mode (OE2) according to instructions received from said processing unit (800) related to what was detected by said first position sensor (180).

20. Apparatus (1000) according to the preceding claim, wherein said second alignment device (200) is placed upstream, relative to said predefined feed path (PA), of said first alignment device (100).

21. Apparatus (1000) according to claim 19 or 20, wherein said alignment system (1) comprises:-a third alignment device (300) of said tape (80), configured to move said tape (80) so as to align it according to said predefined feed path (PA) and operating according to a third actual operating mode (OE3), -a third alignment sensor (350) of said tape (80) configured to detect a third misalignment condition (AAII3) between said tape (80) and said predefined feed path (PA) and operatively associated with said third alignment device (300) via said processing unit (800) so that said third alignment device (300) corrects said third misalignment condition (AAII3),-a second position sensor (280) configured to detect a second position (P2) of said second alignment device (200) and operatively connected to said third alignment device (300) via said processing unit (800), wherein said third alignment device (300) is configured to adjust said third actual operating mode (OE3) according to instructions received from said processing unit (800) related to was what detected by said second position sensor (280).

22. Method for detecting a drift condition of a first alignment device of a tape (80), the latter intended for creating an internal assembly (3) of an electrochemical cell for producing batteries, comprising:- Dispensing said tape (80) via a dispensing unit (2) along a predefined feed path (PA),- Setting up a first alignment device (100) configured to move said tape (80) so as to align it according to said predefined feed path (PA),- Defining a first nominal operating condition (ONI) of said first alignment device (100),- Identifying a first actual operating condition (OE1) of said first alignment device (100) by means of a first position sensor (180) configured to detect a first position (Pl) of said first alignment device (100),- In the event that said first actual operating condition (OE1) is not within said first nominal operating condition (ONI), activating a procedure for modifying said first actual operating condition (OE1).

23. Method according to the preceding claim, comprising:- Arranging a movable portion (750) configured to reversibly move along a displacement direction (d) between a first configuration distal to said dispensing unit (2) and a second configuration proximal to said dispensing unit (2), said movable portion (750) comprising said first alignment device (100).

24. Method according to the preceding claim, comprising:- Arranging a second alignment device (200) configured to move said tape (80) so as to align it according to said predefined feed path (PA),- Defining a second nominal operating condition (ON2) of said second alignment device (200),- Identifying a second actual operating condition (OE2) of said second alignment device (200),- Wherein said procedure for modifying said first actual operating condition (OE1) provides for modifying said second actual operating condition (OE2), keeping it within said second nominal operating condition (ON2), so as to bring said first actual operating condition (OE1) within said first nominal operating condition (ONI).

25. Method according to the preceding claim, comprising:- Arranging a first alignment sensor (150) configured to detect a first misalignment condition (AAII1) between said tape (80) and said predefined feed path (PA) and operatively associated with said first alignment device (100) via a processing unit (800),- selectively actuating said first alignment device (100) so as to adjust said first misalignment condition (AAII1) according to instructions received from said processing unit (800) related to what was detected by said first alignment sensor (150).

26. Method according to claim 24 or 25, wherein:- said identifying said first actual operating condition (OE1) is performed by means of a first position sensor (180) configured to detect a first position (Pl) of said first alignment device (100) and operatively connected to said second alignment device (200) via said processing unit (800),- said modifying said second actual operating condition (OE2) of said second alignment device (200) is performed according toinstructions received from said processing unit (800) related to what was detected by said first position sensor (180).

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