Apparatus and method for laminating separator strips and foil sheets for electrochemical cells, preferably for the manufacture of batteries.

Abstract

The present invention relates to a lamination apparatus (100) and method for laminating separator strips (NS) and foil sheets (201, 301). The apparatus includes a supply unit (20) positioned immediately upstream of a lamination unit (1) and configured to supply separator strips along a supply path (PA); a lamination unit (1) having a lamination surface (10) configured to receive separator strips (NS) and foil sheets (201, 301) to form a lamination structure (S) of separator strips (NS); and a handling unit (130) configured to move the lamination surface (10) relative to the supply unit (20) in a continuous movement along a second work path (P2) defining a closed curve.

Description

Technical Field

[0001] The present invention relates to an apparatus for laminating a separator strip and a foil sheet, which is of a type formed by alternately laminating the separator strip and the foil sheet.

[0002] Furthermore, the present invention relates to a method for laminating a separator strip and a foil sheet.

Background Art

[0003] The present invention finds a preferred application in the field of manufacturing electrochemical cells for the purpose of manufacturing pouch-type or rectangular batteries, but is not limited thereto. For its manufacture, a laminated structure is preferably used that includes separator strips laminated alternately with foil sheets.

[0004] [[ID=二十]]In particular, in the related art, in order to form a structure suitable for use in the manufacture of electrochemical cells for the purpose of manufacturing batteries, a plurality of laminated layers obtained by folding the separator strip itself and foil sheets of electrodes interposed between those layers are combined.

[0005] In an example of an apparatus and a method for manufacturing a battery by alternately laminating a separator strip and a foil sheet, movement of a laminating unit is provided by a controlled pendulum motion using a servo motor and a speed reducer.

[0006] In this specification and the appended claims, specific terms and expressions are considered to have the meanings indicated in the following definitions, unless otherwise explicitly stated.

[0007] The term "separator strip" refers to any solid product supplied in the form of an elongated strip or ribbon within an industrial production line, i.e., an element whose longitudinal elongation is significantly greater than its transverse elongation. This separator strip may be formed from a single strip or ribbon of material, or by overlapping multiple strips to form a multilayer structure.

[0008] Furthermore, this separator strip has properties that allow for some bending as it moves along the corresponding production line.

[0009] Separator strips can be used, for example, by alternately stacking insulating layers to form a laminated or sandwich structure for the manufacture of electrochemical cells.

[0010] Furthermore, the term "separator strip" refers to a strip-shaped product that has properties that allow for a form of separation and / or isolation from other components located nearby.

[0011] This separation can be achieved by physical or chemical properties, depending on the intended use conditions.

[0012] An example of such separation characteristics is an electrically insulating polymer strip positioned in contact with the foil sheet of a conductive electrode.

[0013] This particular configuration is merely an example and not limiting.

[0014] Other embodiments may include polymer strips that are deformation-following so that the strips themselves can be folded and laminated.

[0015] According to some examples, these materials may be polyolefins, such as polyethylene, polypropylene, or copolymers derived therefrom.

[0016] In this context, the term "laminated" refers to an action aimed at forming a continuous structure that is suitable for separating or isolating other components interposed between different layers, by folding back the separator strip itself to form a structure containing multiple layers.

[0017] The term "laminated structure" refers to any structure formed by folding and laminating strips, ribbons, or more generally, strip-like articles themselves. Depending on the protrusions or overlaps, preferably overlapping layers in the vertical direction are created. This laminated or folded structure is intended to create at least partial separation of any products that may be interposed between each layer, and it is not necessary for the different layers of the strips employed to be in direct contact with each other.

[0018] Furthermore, in many cases, this layered structure is more precisely described as a "Z-shape," depending on the folded shape formed by the different layers.

[0019] As mentioned above, this layered structure can be applied not only to the field of electrochemical cells but also to other fields such as conductors and capacitors, where layered structures can be similarly used.

[0020] The term "work path" refers to a closed path moved by a handling device or similar moving element. The start and end points of that path substantially coincide.

[0021] The term “continuous” as used in relation to movement means that the action of the object is performed without interruption or cessation. In particular, the term “continuous” as used in relation to, but not limited to, the supply or movement of a strip means that the strip does not stop during its supply or movement.

[0022] Similarly, the term "continuous" refers to a product, such as a separator strip, that has no interruptions or clear separations within it and is presented as a single unit during the processing steps or use being considered.

[0023] Furthermore, as described above, the strips used in each enucleatable step of the industrial process in question are preferably continuous separator strips. Therefore, this technical solution includes a step of folding the continuous separator strip itself to form at least two overlapping layers of the laminated structure described above. This clarifies at least one process difference from techniques used when sequentially laminating individual layers or multiple pre-formed or cut separator layers (a concept that assumes easy release of a pre-constructed architecture and corresponds to the most restrictive meaning of the term "lamination").

[0024] The term "substantially constant" is used for a measurement or quantity, such as the angle of motion in the trajectory of an object, i.e., with respect to the angle formed as the object moves. In this case, the measurement or quantity means that it maintains a value over time that changes by preferably up to ±10%, preferably up to ±5%, and more preferably up to ±2%.

[0025] The term “direction” means an identifiable vector having direction and orientation, as described or shown herein and in the accompanying drawings. In other words, where the term “direction” is used herein, it means a direction with a defined orientation. In some cases, it may mean the direction, orientation, and norm or magnitude (or, less appropriately, scalar coefficients) of a free vector, and may be described more precisely and in detail. More specifically, “norm” herein is identified as the Euclidean distance between the start and end points of a distance vector and is defined as the square root of the sum of the squares of its components.

[0026] The term "substantially equal to 0 mm" means the minimized value where, due to mere dimensional constraints of the related movement mechanism, this value can deviate from 0 mm by about several millimeters.

[0027] The terms "upstream" or "downstream" respectively mean an object or a process step that occurs before and after in accordance with a specific continuous flow. When these terms are used in relation to the "rewinding direction of the separator strip", with respect to the path following the advancing direction of the separator strip from the first supply element or discharge element (such as a roll, coil, etc.) to the lamination surface being laminated, upstream means the previous step and downstream means the subsequent step.

[0028] In this specification, the term "rewind" is synonymous with "rewinding".

[0029] Also, the term "foil sheet" can be replaced by "electrode" when the embodiments in the exemplified examples and cited examples are related to the use of an electrochemical cell.

[0030] The term "follow in accordance with at least one component" means that when used in the case where B follows A, the movement of A coincides with that of B, that is, the movement vectors of B and A have the same components.

[0031] In this regard, the term "same angular orientation in all possible spatial arrangements" means that a specific arrangement of a device or an object where a set of vectors with a particularly defined orientation in space is correlatable in first place does not change this collinearity of the set of vectors regardless of the possible spatial arrangements. In other words, when this state occurs, the movement operator applied to this set of vectors generates only allowed translations and does not generate rotations.

[0032] The term "Y immediately downstream of X" means that the device or product Y can be specified immediately after X without the intervention of a further device or product.

[0033] The term "selectively extend" means to alter the extension of an object or a part of it, increasing it without pre-set geometric constraints or limitations.

[0034] The phrase "the second path spans the reference plane" means that the second path intersects the reference plane. In other words, the reference plane divides the second path into two parts. Similarly, the reference plane divides space into two half-spaces that are opposite each other. In this case, the two parts of the second path are contained in one half-space and the other, respectively.

[0035] The term "complete movement" means reaching the final or predetermined position.

[0036] The term "while the laminated structure is being formed" refers to an action or process state that occurs at any step involved in the formation of the laminated structure.

[0037] When the term "consistent" is used in relation to the movement of two or more elements, it means that these elements perform substantially the same movement substantially simultaneously. This term is understood as a synonym for "integrated," which has a broader meaning in relation to structural constraints.

[0038] In other words, two elements moving in accordance with a consistent motion move together as a single structure. In this case, these elements do not necessarily need to be directly joined or constrained to each other, and may be related to other units or parts of the device. In fact, each handling system for the two elements may be configured, programmed, or operated to move both elements together simultaneously as needed. Alternatively, for example, temporary constraints (physical or digital) may be placed between the two elements to connect and move them together in cooperation over several process steps, and then separate them again so that they can move independently of each other.

[0039] The phrase "deviation angle β is greater than 60 degrees in absolute value" means that angles greater than +60 degrees and angles less than -60 degrees are considered.

[0040] In particular, in this specific context, the deviation angle β can be considered as an angle of rotation in a first direction (positive direction) or a second direction opposite to it (negative direction).

[0041] In a preferred embodiment described later, the separator strip frequently changes its orientation in a particular section of the process, so this deviation angle is useful for clearly indicating the condition that the strip is rotating in one direction or in the opposite direction.

[0042] Clearly, the considerations made regarding the expression for 60 degrees apply equally to other angle values ​​that are expressed similarly (e.g., 70 degrees and 80 degrees).

[0043] Furthermore, please note that the expression "to move an object between a first position and a second position" means both movement from the first position to the second position and movement from the second position to the first position.

[0044] This definition also applies to similar action expressions such as "transferring" or "moving" a general object between two locations, between two areas, or even between two different operational configurations.

[0045] In response to the persistent need to improve the performance and efficiency of manufacturing processes, the applicant has preliminary observed that, in a production line for forming laminated structures, when forming laminated structures suitable for use in forming electrochemical cells for the purpose of manufacturing batteries, the rate at which separator strips advance relative to the unit performing the lamination can be a significant factor limiting the manufacturing capacity of the production line itself.

[0046] Furthermore, this limitation becomes even more important when high precision is required in the formation of layered structures.

[0047] In particular, the applicant has observed that in many applications, such as in the field of electrochemical cell manufacturing, it is necessary to ensure high precision in the geometric shape of the laminate and in the step of arranging electrode foil sheets between the laminated layers, and that this is essential to ensure the performance required of the finished product.

[0048] To ensure manufacturing precision, it is necessary to interrupt the progress of the strips forming the laminated structure; therefore, the above requirement leads to a decrease in the overall speed of the production line.

[0049] However, the applicant observed that this solution results in a significant reduction in process speed, and that abrupt stopping and / or restarting of the strips may cause unevenness in the separator strips, which could impair the manufacturing quality of the final product.

[0050] In fact, the applicant has confirmed that such a significant reduction in speed during the process is due to a step in which the movement speed of the laminated surface inevitably becomes zero.

[0051] Furthermore, the applicant observed that such abrupt stops and / or restarts, which induce improperly controlled tension in the strip, can cause significant microscopic and macroscopic deformations in the separator strip structure, thereby introducing a step that could potentially cause serious damage to the material, which is a critical component of the laminated structure.

[0052] Furthermore, the applicant observed that such microscopic and macroscopic deformations of the separator strip structure can lead to undesirable tension conditions, potentially causing strip breakage in the case of excessive tension, and, in the case of tension loss, causing uncontrollable elongation, even locally, which can result in wrinkles and sagging, impairing the efficient alignment of each layer and proper contact between laminated surfaces. The applicant also observed that these problems, associated with damage to the separator strip structure or the occurrence of non-constant and non-uniform tension conditions with significant non-uniformity at the contact surfaces, can be particularly serious in applications in the electrical field. In this field, desired conditions for insulation or contact between different parts must be reliably and consistently guaranteed with the utmost reliability and reproducibility.

[0053] Therefore, the applicant has identified a method to improve the lamination speed of separator strips compared to known solutions by significantly reducing or avoiding damage to the separator strips during the formation of the laminated structure and further during the interlayer positioning step of the foil sheets.

[0054] Furthermore, the applicant has found that by avoiding stopping and maintaining the continuous movement of the laminated surface, it is possible to speed up the lamination process without compromising the dimensional accuracy of the product, the dimensional accuracy and spatial deployment of the laminated structure, and without creating uncontrollable and harmful tension conditions in the processed strips. [Overview of the project] [Problems that the invention aims to solve]

[0055] These characteristics allow strips to proceed at increased unwinding and stacking speeds, overcoming the limitations on process speeds that may be adopted depending on the teachings of known technologies.

[0056] Furthermore, the applicant has observed that the present invention can be advantageously utilized in the steps of gripping a strip to initiate lamination onto a desired lamination surface, or in the steps of cutting a separator strip and placing a foil sheet thereon. [Means for solving the problem]

[0057] Therefore, in its first embodiment, the present invention is preferably directed to an apparatus for laminating separator strips and foil sheets.

[0058] Preferably, the apparatus includes a stacking unit.

[0059] Preferably, the apparatus includes a supply unit located immediately upstream of the stacking unit. The supply unit is configured to supply separator strips along the supply path.

[0060] Preferably, the lamination unit has a lamination surface. The lamination surface is configured to receive separator strips and foil sheets to form a laminated structure of separator strips.

[0061] Preferably, the apparatus includes a handling unit configured to move the stacked surface relative to a supply unit in a continuous movement along a second work path defining a closed curve.

[0062] In this way, the applicant has found that it is possible to overcome the limitations of known technology by avoiding the second working path of the laminated surface having a reversal point, i.e., a point where the moving speed of the laminated surface is equal to zero.

[0063] In fact, this solution cannot be implemented if the second work path defines a segment (straight or curved) or an open curve where the ends of this path do not coincide.

[0064] In other words, the applicant has found that by avoiding reversal points, it is possible to continuously move the stacked surface by generating relative "movement stop" conditions between different devices.

[0065] The applicant noted that this technical solution not only reduces process timing but also avoids sudden deceleration and acceleration, resulting in an extended average lifespan for the handling equipment involved and a significant reduction in undesirable tension that may occur on the separator strip.

[0066] Furthermore, based on a second aspect, the present invention relates to a method for forming a laminated structure of separator strips, preferably a laminated structure of an electrochemical cell for the purpose of manufacturing a battery.

[0067] Preferably, the method includes the step of locating a supply unit that is positioned immediately upstream of the lamination unit and configured to supply separator strips along the supply path.

[0068] Preferably, the method includes the step of arranging a lamination unit which includes a movable lamination surface configured to laminate separator strips on itself.

[0069] Preferably, the method includes the step of positioning a handling unit configured to move a stacked surface relative to a supply unit in a continuous movement along a second work path defining a closed curve.

[0070] Preferably, the method includes the step of restraining a first layer of separator strips on the laminated surface.

[0071] Preferably, the method includes moving the laminated surface relative to a supply unit in accordance with a work path by constraining at least one further layer of separator strips on the laminated surface which moves in a continuous motion to form a laminated structure.

[0072] Furthermore, based on this embodiment, it becomes possible to achieve the same advantages described in relation to the previous embodiment.

[0073] In at least one of the embodiments described above, the present invention may have at least one of the following further preferred features.

[0074] Preferably, the supply unit includes an outlet section of a separator strip that intersects a reference plane.

[0075] Preferably, the second path spans the reference plane.

[0076] In this way, by using a continuous strip and folding the strip without stopping it, the desired number of layers can be obtained, and the desired layered structure can be effectively achieved.

[0077] Preferably, the supply unit includes a discharge direction control device located immediately upstream of the stacking unit. The discharge direction control device defines a reference discharge direction for the separator strips.

[0078] Preferably, the reference plane is parallel to the reference delivery direction.

[0079] In this way, by inducing a minimum amount of tension in the separator strip and forming a compact and efficient device, it becomes possible to optimally manage the lamination steps of the separator strip.

[0080] Preferably, the reference plane is the plane of symmetry of the second work path.

[0081] In this way, the entire movement required by the movable parts is optimized, and the second work path becomes symmetrical.

[0082] Preferably, the second work path defines a curve having two sections that intersect at an intersection point on the reference plane.

[0083] This, ideally, reduces the movement that needs to occur at the laminated surfaces in order to form the desired laminated structure.

[0084] Preferably, the second work path has a substantially bifoliate shape.

[0085] This solution makes it possible to minimize the second work path by having a sufficiently extended area of ​​potential stopping, which is preferably located distal to the intersection.

[0086] Preferably, the reference plane is coplanar with respect to the separator strip according to the reference discharge direction.

[0087] In this way, the twisting that may be induced in the separator strip during the lamination step is minimized.

[0088] Preferably, the lamination unit includes a first block device and / or a second block device configured to selectively restrain separator strips at a first restraint position and / or a second restraint position, respectively, located near the lamination surface, in order to form a laminated structure of separator strips.

[0089] Preferably, the delivery direction control device is configured to define the end section of the separator strip provided between the delivery direction control device and the first or second proximal block device.

[0090] Preferably, the handling unit includes a second handling device. The second handling device is A first stacking position defining a first end section of a separator strip, wherein the layers of the stacked structure are constrained to the stacking unit by a first and / or second block device, · A second stacking position, different from the first stacking position, is defined, and a second end section of the separator strip having substantially the same length as the first end section, and the second stacking position is constrained to the stacking unit by the first and / or second block apparatus relative to the first stacking position. It is configured to move the stacked surface relative to the supply unit between them.

[0091] In this way, if desired, the process can be carried out continuously by stacking layers of substantially equal lengths of separator strips, thereby forming a laminated structure.

[0092] Preferably, the second handling device is configured to move the stacking surface relative to the supply unit along a second work path between the first and second stacking positions such that the first end section increases in length by an amount substantially equal to the distance between the first and second block devices.

[0093] In this way, it becomes possible to position the stacked separator strips in the correct size within each layer of the stacked structure while maintaining compact and effective movement.

[0094] Preferably, the handling unit includes a first handling device for the delivery direction control device, configured to move the delivery direction control device along a first work path.

[0095] Preferably, when the stacking surface is in the first stacking position or the second stacking position, the delivery direction control device is in the same position relative to the supply unit.

[0096] In this way, the ideal stacking cycle of the two separator layers can return to the same base configuration. This solution allows this operation to be easily reproduced depending on the desired number of layers.

[0097] Preferably, the second work path includes at least one receiving section parallel to the reference delivery direction for each complete movement between the first stacking position and the second stacking position.

[0098] In this way, it becomes possible to release the target object compactly and effectively.

[0099] Preferably, the reference delivery direction is perpendicular to the stacking surface, and more preferably, it is in the vertical direction.

[0100] In this way, it becomes possible to perform a release step that unwinds the separator strip according to the ideal direction, ensuring improved operational accuracy.

[0101] Preferably, the supply unit includes a first direction control device positioned upstream of the delivery direction control device along the supply path. This defines a separator strip storage section between the first direction control device and the delivery direction control device.

[0102] Preferably, the first handling device of the delivery direction control device is configured to move the delivery direction control device along a first work path.

[0103] Preferably, the first handling device is • An approach configuration in which the delivery direction control device is at the minimum distance from the first direction control device, the minimum distance being measured according to the length of the separator strip placed between the first direction control device and the delivery direction control device, • An extended configuration in which the delivery direction control device is at its maximum distance from the first direction control device, the maximum distance being measured according to the length of the separator strip placed between the first direction control device and the delivery direction control device. The device is configured to move the transmission direction control device between these points.

[0104] Preferably, the first handling device is configured to move the discharge direction control device such that the separator strip maintains the same angular orientation in all spatial arrangements that the separator strip can take between the approaching state and the extended state in the storage section, and such that the only portion of the separator strip downstream of the discharge direction control device that changes the angular orientation while the stacked structure of the separator strip is being formed is the end section.

[0105] These features allow the movement of a movable feed direction control device to accumulate a desired amount of strip available for use in other steps. In this way, the use of continuous strip feeding is further facilitated, while providing a step in which the separator strip is not actually stacked on the lamination surface.

[0106] In other words, this makes it possible to implement a process that never provides a stop, thereby optimizing the timing of the completion of the layered structure for the electrochemical cell, avoiding sudden stops and accelerations of the various working units involved that would reduce its average service life, and keeping the separator strip under constant tension at all times.

[0107] It should be noted that the applicant has found it possible to change the accumulation section of the separator strip, which can also function as a movable exit section of the separator strip, just upstream of the lamination region. More specifically, the applicant has found that by determining the final control point of the strip upstream of the lamination surface, it is possible to move the discharge direction control device cooperatively and potentially independently with respect to the lamination surface itself.

[0108] In this way, the applicant has designed a system that enables a substantially constant tracking state between the delivery direction control device and the stacking surface in accordance with the moving element, thereby enabling a first step of reducing the storage interval while maintaining a substantially constant distance between the direction control device and the stacking surface in accordance with the desired moving element, and a second step of increasing the storage interval during the next step in which the movement of the delivery direction control device is the same as the movement of the stacking surface.

[0109] In other words, the second step involves a kind of "movement stop." Here, even if the lamination plane, and consequently the supplied separator strip, continues to move, it is possible to perform the processing that is typically provided in a process stop, given the level of complexity or precision required.

[0110] Here again, the applicant separated the uninterrupted rewinding process from the lamination process, which can be interrupted according to needs and requests.

[0111] More specifically, this intriguing technical solution makes it possible to form two different work paths for the feed direction control device and the stacking surface. These include an identical follow section and a follow section by the same moving element in which the stacking surface performs a movement of a greater absolute value than the movement performed by the feed direction control device.

[0112] In other words, the delivery direction control device and the stacked surface are moved by first and second handling devices, each configured to follow at least one moving element over the entire length of the first and second work paths, and the same following is performed on all moving elements during the second step common to the first and second work paths.

[0113] In this way, while separator strips are supplied, for example, at a constant rate, it becomes possible to stack more strips than are supplied, and as a result, the previously stored amount can be recovered by extending the storage section.

[0114] This accumulation step preferably corresponds to a transition from an approaching state to an extended state, while the step of requesting and using a larger amount of strip than supplied corresponds to a transition from an extended state to an approaching state.

[0115] Furthermore, it should be noted that this technical solution only changes the angular orientation in the end sections during the lamination steps. This reduces or eliminates the sail effect caused by the separator strip, thereby improving the quality of the lamination process.

[0116] Preferably, one handling unit is configured to move a delivery direction control device to follow the stacking surface in accordance with at least one moving element.

[0117] In this way, the lamination process can be carried out by maintaining a constant distance, thereby reducing positional fluctuations between the lamination surface and the supply unit.

[0118] Preferably, one handling unit is configured to follow between the delivery direction control device and the stacking surface for at least 80%, more preferably 90%, and even more preferably 100% of the second work path. According to one embodiment, the following is performed for at least 80%, more preferably 90%, and even more preferably 100% of the operating time of the second work path.

[0119] In this way, deflection phenomena can be effectively reduced for a significant portion of the process steps related to the unwinding and stacking of the separator strips, while the first distance can be kept constant over time and equal to a predetermined value. Furthermore, it is possible to provide a predetermined limited variation in this first distance, with a particular aim to provide further advantages while ensuring a high overall process speed without compromising the tension state or damaging the stacked separator strips.

[0120] Furthermore, this technical solution makes it possible to provide variations in the relative velocity or trajectory between the feed direction control device and the stacking surface, which allows for increasing or decreasing the elongation of the separator strip downstream of the feed direction control device and / or changing the stacking configuration.

[0121] Preferably, one handling unit is configured to move a delivery direction control device to follow the stacking surface according to a reference delivery direction.

[0122] In this way, an even more compact and effective configuration of the apparatus according to the present invention becomes possible.

[0123] Preferably, the end section is oriented according to a deviation direction that is inclined by a deviation angle that changes according to the second work path with respect to the reference discharge direction.

[0124] Preferably, the first handling device is By moving the transmission direction control device from the extended state to the approach state, the deviation angle changes in absolute value from substantially 0 degrees to substantially 90 degrees. The discharge direction control device is configured to move from an approaching state to an extended state so that the deviation angle changes in absolute value from substantially 80 degrees to substantially 100 degrees, and preferably remains constant at substantially 90 degrees.

[0125] This technical solution makes it possible to determine a configuration that maintains the same angular orientation of the laminated surface for a certain period of time while maintaining the release of the separator strip at a constant rate.

[0126] Advantageously, it becomes possible to perform a separator strip processing process that would typically require a complete halt to the process during the transition from the approach state to the stretched state.

[0127] The applicant internally defines this configuration as "movement stop".

[0128] In other words, this method optimizes the movement stopping step. This can be identified when the deviation angle is substantially equal to 90 degrees in the stacking step, or when the deviation angle changes in absolute value from substantially 0 degrees to substantially 90 degrees. This solution allows for a compact, uninterrupted process with optimized steps.

[0129] Preferably, the apparatus includes a first and / or second discharge assembly of the foil sheet.

[0130] Preferably, the first and / or second discharge assemblies of the foil sheets each include first and / or second moving devices relative to a second handling device. The first and / or second moving devices are configured to discharge the first or second foil sheets at a minimum discharge distance from a portion of the separator strip on the laminate surface when the first or second discharge assembly moves toward the laminate surface between receiving sections of the second work path.

[0131] Preferably, the approach movement is configured to cause a condition during the receiving section in which the relative velocity between the first and / or second release assemblies of the foil sheet and the laminate surface is substantially zero.

[0132] In this way, the alignment of the electrode foil sheets can be optimized during the release step, allowing for precise and efficient acquisition of the desired electrochemical cell, and enabling control over the construction of a laminated structure with the electrode foil sheets interposed between layers of separator strips.

[0133] In particular, when the release is performed by approaching with purely vertical handling, undesirable horizontal movement is avoided. In this way, it becomes possible to release and transfer foil sheets more accurately, reliably, and reproducibly.

[0134] Preferably, the receiving section is parallel to the reference delivery direction, preferably perpendicular to the stacking surface, and more preferably in the vertical direction.

[0135] Preferably, the first and / or second moving device is a motion mechanism having two degrees of freedom, and more preferably, it includes a horizontal guide and a vertical guide.

[0136] In this way, complex movements within the space of the mobile device can be performed effectively.

[0137] Preferably, the approaching movement occurs while the delivery direction control device moves from the approaching state to the extended state.

[0138] Preferably, the approach movement begins in a substantially approaching state, and the receiving section ends in a substantially extended state.

[0139] In this way, the steps of the release process are optimized, and potential damage to the separator strip can be minimized.

[0140] Preferably, the approach and / or reception interval is purely vertical translational motion.

[0141] In this way, by utilizing the friction caused by gravity, it becomes possible to approach and / or release the foil sheet precisely while avoiding undesirable horizontal movement.

[0142] Preferably, the approach movement is the same as the movement performed by the delivery direction control device and the stacking surface.

[0143] This precise cooperative mechanism minimizes damage and deflection during the formation of the laminated structure, ensuring that the foil sheets are released while the tension of the separator strip remains constant. This is because the accumulation section can be selectively determined, and the entire system translates vertically and moves from an approaching state to an extended state while the first or second foil sheet is being released, thereby enabling continuous movement of the laminated surface.

[0144] Preferably, the first and / or second handling devices are configured to move the delivery direction control device and / or the stacking surface relative to each other according to the reference delivery direction. This ensures that the deviation angle is maintained at an absolute value of more than 60 degrees, more preferably more than 70 degrees, and even more preferably more than 80 degrees, when the end section has an extension exceeding 1 / 3 of the maximum length between the first and second constraint positions of the separator strip relative to the stacking surface.

[0145] The applicant has found that these characteristics make it possible to move the stacked surface quickly, effectively, and reversibly in a small space from a deviation angle equal to +60 to -60 degrees, more preferably +70 to -70 degrees, and even more preferably +80 to -80 degrees, and thereafter extend most of the end section of the separator strip according to a substantially constant deviation angle, thereby substantially preventing deflection in the conveyor belt.

[0146] In this way, by reducing the elongation of this section, it becomes possible to minimize the deflection phenomenon of the strip section configured downstream of the delivery direction control device.

[0147] Preferably, the handling unit is configured to move the delivery direction control device and / or the stacking surface, respectively, such that a first distance between the delivery direction control device and the stacking surface, measured according to a reference delivery direction, is maintained at 0 to 30 mm, more preferably 0 to 15 mm, and even more preferably substantially 0 mm.

[0148] In this way, the applicant has found that it is possible to maintain a sufficiently small distance between the feed direction control device and the stacking surface. This distance is preferably defined taking into account the overall dimensional constraints of the motion mechanism involved.

[0149] This solution further reduces the elongation in this section, minimizing the deflection phenomenon in the strip section located downstream of the delivery direction control device.

[0150] Preferably, the first distance is substantially constant for at least 40%, more preferably at least 50%, more preferably at least 80%, and even more preferably 100% of the operating time of the second work path.

[0151] In this way, deflection phenomena can be effectively reduced for most of the process steps related to the unwinding and stacking of separator strips. The first distance is maintained at a predetermined value over time. Furthermore, it is possible to provide limited variations within a predetermined range of this first distance, specifically aimed at providing additional advantages while maintaining a high overall process speed without compromising the tension state or damaging the stacked separator strips.

[0152] Preferably, the handling unit is configured to move the delivery direction control device relative to the stacking surface by defining a second distance between the delivery direction control device and the stacking surface. This allows, • When the deviation angle is between +80 degrees and -80 degrees, the second distance is minimized, and / or • If the deviation angle is between +81° and +100°, or between -81° and -100°, the second distance is selectively extended.

[0153] This solution allows for greater flexibility, adaptability, and modularity in the process. This makes it possible to maintain constant tension in the separator strip while maintaining a high process speed, even when the elongation of the end sections of the separator strip is changed, without significantly affecting the deflection phenomenon.

[0154] Preferably, when the deviation angle is between +80 degrees and -80 degrees, the second distance is substantially equal to the first distance.

[0155] In this way, the end sections of the separator strip are kept as small as possible to reduce or eliminate the deflection phenomenon that may potentially occur when the strip must undergo a large change in angular orientation, that is, when the value of the deviation angle changes.

[0156] Preferably, when the deviation angle is between +81 degrees and +100 degrees, or between -81 degrees and -100 degrees, the second distance between the first constraint position and the second constraint position is between 0% and 10% of the maximum length.

[0157] This technical solution also makes it possible to further vary the extension of the end sections depending on the specific form of the laminated structure formed and / or to avoid interference with the motion mechanism provided in the device.

[0158] Preferably, when the deviation angle is substantially equal to +90 degrees or -90 degrees, the first distance is When approaching the laminated surface, does it change from a constant value within the range of the first distance and 200% of the first distance? • When moving away from the laminated surface, the value changes from a constant value to a value within the range of a first distance and 200% of the first distance.

[0159] In this way, it becomes possible to move the laminated surface beyond the state perpendicular to the reference delivery direction. This allows the end sections of the separator strips overlapping the laminated surface to make better contact, improving the precision in forming the laminated structure. Alternatively, increasing the elongation of the end sections can more effectively avoid unwanted interactions between the relevant motion mechanisms.

[0160] To explain more clearly, "approaching movement" refers to relative movement initiated by reducing the distance between the feed direction control device and the stacking surface. Note that when the amount of approaching movement is equal to 100% of the first distance, the actual distance between the feed direction control device and the stacking surface becomes zero. Also note that when the amount of approaching movement exceeds 100% of the first distance, the actual distance between the feed direction control device and the stacking surface begins to increase again while maintaining the same approaching direction. Furthermore, when the amount of approaching movement is equal to 200% of the first distance, the feed direction control device will be positioned on the opposite side of the stacking surface from the initial state corresponding to the first distance. As a result, the distance between the feed direction control device and the stacking surface will be equal to 100% of the first distance, but its position will be on the opposite side of the stacking surface.

[0161] Preferably, the first and / or second restraint positions of the separator strip with respect to the laminated surface are restraint points where the separator strip is restrained by first and / or second block devices formed on the laminated unit on the laminated surface.

[0162] In this way, it becomes possible to constrain and precisely define the end sections of the separator strips to be stacked in order to form the desired stacked structure. At the same time, by defining the end sections of the constraint points, it becomes possible to control and minimize the portions of the separator strip that are potentially exposed to asymmetry conditions of hydrodynamic lateral pressure that cause deflection phenomena.

[0163] According to a preferred embodiment, the first and / or second block device is a gripper, suction cup, or electromagnetic system adapted to selectively hold a portion of the separator strip integrally with the lamination surface.

[0164] In this way, it becomes possible to reversibly constrain a desired portion of the end section according to a predetermined time sequence at different points.

[0165] According to several embodiments, the laminated surface has a substantially planar unfolded portion having a substantially rectangular base. This can be sized according to the desired form of the laminated structure to be formed.

[0166] Preferably, the first and / or second block apparatus is constrained in such a way that translational movement within the same plane relative to the stacking surface is permitted.

[0167] In other words, the first and / or second block apparatus are constrained to the stacking planes at fixed positions that are variable in the direction of the distance between them.

[0168] In this way, it becomes possible to easily and quickly adapt the desired form of the laminated surface depending on the laminated surface being used.

[0169] Preferably, the first and / or second block apparatus is constrained vertically while allowing translational movement with respect to the stacking surface.

[0170] This technical solution makes it possible to more effectively restrain the separator strips against the laminated surfaces as the formation of the laminated structure progresses.

[0171] Preferably, the delivery direction control device includes a pair of rollers.

[0172] This technical solution allows for easy guidance of the separator strip in response to changes in the deviation angle, thereby minimizing potential damage to the strip itself.

[0173] Preferably, a pair of rollers are designed to face each other so that a separator strip passes between them.

[0174] In this way, the separator strip can be guided more effectively according to the desired reference discharge direction.

[0175] Preferably, a pair of opposing rollers have equal diameters and are driven by direct movement via a strip, chain, or similar technical solution, or by electric motors, or are arranged in controlled rotation relative to each other around a central axis of rotation.

[0176] In this way, surface deformation can be avoided, the passage of the separator strip can be effectively guided, and the separator strip can be moved locally relative to the supply rate upstream of them.

[0177] Preferably, the first direction control device is a driven roller.

[0178] In this way, the separator strip can be accurately guided along the supply path.

[0179] Preferably, the separator strips are supplied continuously, preferably at a substantially constant supply rate.

[0180] In this way, it becomes possible to perform all desired process steps, including those related to stopping movement, while maintaining a continuous supply of strips, and the apparatus designed to manage these operational steps can be simplified.

[0181] Furthermore, this step minimizes the tension that may occur in the separator strip.

[0182] Preferably, the first and second handling devices are configured to cause relative movement between the stacking surface and the feed direction control device. This ensures that the same deviation angle with respect to the reference feed direction remains substantially constant with respect to the elongation of the end section. This elongation of the end section is preferably 10% to 100%, more preferably 20% to 90%, and even more preferably 40% to 60% of the maximum length between the first and second restraint positions of the separator strip relative to the stacking surface.

[0183] The applicant has found that these characteristics make it possible to maintain a constant angular orientation between the feed direction control device and the stacking surface during the unwinding and / or stacking steps. This eliminates the angular fluctuation state that precedes the generation of asymmetry in hydrodynamic lateral pressure on the separator strip, thus preventing deflection of the separator strip.

[0184] Preferably, relative movement occurs when the deviation angle is between +81 degrees and +100 degrees, or between -81 degrees and -100 degrees.

[0185] In this case, the change in elongation of the end section of the separator strip occurs substantially perpendicular to the reference delivery direction of the separator strip from the delivery direction control device. This allows for variations in the desired amount of separator strip available to more effectively avoid, for example, dimensional constraints of other nearby motion mechanisms.

[0186] According to other embodiments, relative movement occurs when the deviation angle is substantially equal to 0 degrees.

[0187] This technical solution makes it possible to unwind the separator strip while maintaining the same angular orientation given by the delivery direction control device. This further reduces the damage and deformation that the separator strip may suffer.

[0188] Preferably, the method includes a technical feature in which the supply unit includes an outlet section of a separator strip intersecting a reference plane.

[0189] Preferably, the second path spans the reference plane.

[0190] In this way, by using a continuous strip and folding the strip without stopping it, the desired number of layers can be obtained, and the desired layered structure can be effectively achieved.

[0191] Preferably, the supply unit includes a discharge direction control device located immediately upstream of the stacking unit. The discharge direction control device defines a reference discharge direction for the separator strips.

[0192] Preferably, the reference plane is parallel to the reference delivery direction.

[0193] In this way, by inducing a minimum amount of tension in the separator strip and forming a compact and efficient device, it becomes possible to optimally manage the lamination steps of the separator strip.

[0194] Preferably, the reference plane is the plane of symmetry of the second work path.

[0195] In this way, the entire movement required by the movable parts is optimized, and the second work path becomes symmetrical.

[0196] Preferably, the second work path defines a curve having two sections that intersect at an intersection point on the reference plane.

[0197] This, ideally, reduces the movement that needs to occur at the laminated surfaces in order to form the desired laminated structure.

[0198] Preferably, the second work path has a substantially bifoliate shape.

[0199] This solution makes it possible to minimize the second work path by having a sufficiently extended area of ​​potential stopping, which is preferably located distal to the intersection.

[0200] Preferably, the reference plane is coplanar with respect to the separator strip according to the reference discharge direction.

[0201] In this way, the twisting that may be induced in the separator strip during the lamination step is minimized.

[0202] Preferably, the method includes the step of arranging a lamination unit which includes a first and / or second block device configured to selectively restrain layers of separator strips with respect to the lamination surface.

[0203] Preferably, the method includes the step of positioning a supply unit, wherein the delivery direction control device is configured to define an end section of a separator strip provided between the delivery direction control device and a first or second proximal block device.

[0204] Preferably, the method includes the step of positioning a second handling unit configured to move the stacked surface relative to the supply unit in a continuous movement along a second work path.

[0205] Preferably, the method includes the step of restraining a first layer of separator strips on a laminated surface so as to define an end section.

[0206] Preferably, the method involves continuous movement by a first handling device. A first stacking position defining the first end section of the separator strip, wherein the layers of the stacked structure are constrained to the stacking unit by the first and / or second block device, The process includes the step of moving the laminated surface to a second laminated position, which is different from the first laminated position, and defines a second end section of the separator strip, with respect to the first laminated position, the second laminated position, where further layers of the laminated structure are constrained to the laminated unit, by a first and / or second block device.

[0207] Preferably, the method includes the steps of constraining an additional layer with respect to a first stacking position by a first and / or second block device, and moving the stacking plane such that the second end section of the second stacking position has the same length as the first end section of the first stacking position.

[0208] Preferably, the method includes the step of repeating the above operation by continuously moving the laminated surface from a second laminated position to a first laminated position using a first handling device. This constrains an additional layer to the second laminated position by the first and / or second blocking device. The method also includes the step of moving the laminated surface so that the first end section of the first laminated position has the same length in elastic modulus as the second end section of the second laminated position, returning to the same state as when the continuous movement of the laminated surface began.

[0209] In this way, it is possible to continuously advance the process by stacking separator strips so that they have substantially equal lengths, as needed, and to form a laminated structure.

[0210] Preferably, the second handling device is configured to move the stacking surface relative to the supply unit along a second work path between the first and second stacking positions such that the first end section increases in length by an amount substantially equal to the distance between the first and second block devices.

[0211] In this way, it becomes possible to position the stacked separator strips in the correct size within each layer of the stacked structure while maintaining compact and effective movement.

[0212] Preferably, the method includes the step of arranging a first handling device of a delivery direction control device provided within a handling unit. The first handling device is configured to move the delivery direction control device along a first work path.

[0213] Preferably, the method includes the step of moving the delivery direction control device so that the delivery direction control device is in the same position relative to the supply unit when the stacking surfaces are in the first and second stacking positions.

[0214] In this way, the ideal stacking cycle of the two separator layers can return to the same base configuration. This solution allows this operation to be easily reproduced depending on the desired number of layers.

[0215] Preferably, the method is characterized in that, for each complete movement between the first stacking position and the second stacking position, the second work path includes at least one receiving section parallel to the reference delivery direction.

[0216] In this way, it becomes possible to release the target object compactly and effectively.

[0217] Preferably, the reference delivery direction is perpendicular to the stacking surface, and more preferably, it is in the vertical direction.

[0218] In this way, it becomes possible to perform a release step that unwinds the separator strip according to the ideal direction, ensuring improved operational accuracy.

[0219] Preferably, the method includes the step of arranging a first directional control device provided within the supply unit. The first directional control device is positioned upstream of the delivery directional control device along the supply path and defines a separator strip storage section between the first directional control device and the delivery directional control device.

[0220] Preferably, the method includes the step of providing a first handling device for the delivery direction control device, which allows the delivery direction control device to be moved along a first work path.

[0221] Preferably, the method involves, via a first handling device, • An approach state in which the delivery direction control device is at the minimum distance from the first direction control device, the minimum distance being measured according to the length of the separator strip placed between the first direction control device and the delivery direction control device, • An extended state in which the delivery direction control device is at its maximum distance from the first direction control device, the maximum distance being measured according to the length of the separator strip placed between the first direction control device and the delivery direction control device. The transmission direction control device is moved between these points, and also, The method includes moving the discharge direction control device such that the only portion of the separator strip downstream of the discharge direction control device that maintains the same angular orientation in all spatial arrangements the separator strip can take between the approach state and the extended state in the storage section, and changes the angular orientation while the stacked structure of the separator strip is being formed, is the end section.

[0222] These features allow the movement of a movable feed direction control device to accumulate a desired amount of strip available for use in other steps. In this way, the use of continuous strip feeding is further facilitated, while providing a step in which the separator strip is not actually stacked on the lamination surface.

[0223] Preferably, one handling unit is configured to move a delivery direction control device to follow the stacking surface in accordance with at least one moving element.

[0224] In this way, the lamination process can be carried out by maintaining a constant distance, thereby reducing positional fluctuations between the lamination surface and the supply unit.

[0225] Preferably, the method includes the step of performing tracking between the delivery direction control device and the stacking surface for at least 80%, more preferably 90%, and even more preferably 100% of the second work path.

[0226] In this way, deflection phenomena can be effectively reduced for a significant portion of the process steps related to the unwinding and stacking of the separator strips, while the first distance can be kept constant over time and equal to a predetermined value. Furthermore, it is possible to provide a predetermined limited variation in this first distance, with a particular aim to provide further advantages while ensuring a high overall process speed without compromising the tension state or damaging the stacked separator strips.

[0227] Furthermore, this technical solution makes it possible to provide variations in the relative velocity or trajectory between the feed direction control device and the stacking surface, which allows for increasing or decreasing the elongation of the separator strip downstream of the feed direction control device and / or changing the stacking configuration.

[0228] Preferably, the movement of the delivery direction control device, which follows the stacking surface, is performed according to the reference delivery direction.

[0229] In this way, an even more compact and effective configuration of the apparatus according to the present invention becomes possible.

[0230] Preferably, the method includes the step of providing an end section whose orientation is determined according to a deviation direction, which is inclined by a deviation angle that changes according to a second work path with respect to a reference discharge direction.

[0231] Preferably, the method is When the transmission direction control device moves from the extended state to the approach state, the deviation angle changes in absolute value from substantially 0 degrees to substantially 90 degrees. The procedure includes the step of moving the delivery direction control device by a first handling device such that when the delivery direction control device moves from an approaching state to an extended state, the deviation angle changes in absolute value from substantially 80 degrees to substantially 100 degrees, preferably remaining constant at substantially 90 degrees.

[0232] This technical solution makes it possible to determine a configuration that maintains the same angular orientation of the laminated surface for a certain period of time while maintaining the release of the separator strip at a constant rate.

[0233] Advantageously, it becomes possible to perform a separator strip processing process that would typically require a complete halt to the process during the transition from the approach state to the stretched state.

[0234] The applicant internally defines this configuration as "movement stop".

[0235] In other words, the movement stopping step is optimized in this way. This can be identified when the deviation angle is substantially equal to 90 degrees in the stacking step, or when the deviation angle changes in absolute value from substantially 0 degrees to substantially 90 degrees. This solution allows for a compact, uninterrupted process with optimized steps.

[0236] Preferably, the method includes the step of positioning first and / or second discharge assemblies of foil sheets provided in the apparatus. Each of the first and / or second discharge assemblies of foil sheets includes first and / or second moving devices configured to move the first and / or second discharge assemblies of foil sheets.

[0237] Preferably, the method includes the step of moving the first and / or second release assemblies of the foil sheets in response to an approach movement configured with respect to the lamination surface. This allows the first or second foil sheets, selectively constrained to the first or second release assembly of the foil sheets, to move with respect to the constrained portion of the separator strip on the lamination surface at a minimum release distance. This approach movement is configured to produce a condition during the receiving section in which the relative velocity between the first and / or second release assemblies of the foil sheets and the lamination surface is substantially zero.

[0238] In this way, the alignment of the electrode foil sheets can be optimized during the release step, allowing for precise and efficient acquisition of the desired electrochemical cell, and enabling control over the construction of a laminated structure with the electrode foil sheets interposed between layers of separator strips.

[0239] In particular, when the release is performed by approaching with purely vertical handling, undesirable horizontal movement is avoided. In this way, it becomes possible to release and transfer foil sheets more accurately, reliably, and reproducibly.

[0240] Preferably, the receiving section is parallel to the reference delivery direction, preferably perpendicular to the stacking surface, and more preferably in the vertical direction.

[0241] Preferably, the method includes the feature that an approaching movement occurs during the transition from an approaching state to an extended state.

[0242] Preferably, the method includes the characteristic that the approach movement begins in a substantially approaching state and the receiving section ends in a substantially extended state.

[0243] In this way, the steps of the release process are optimized, and potential damage to the separator strip can be minimized.

[0244] Preferably, the approach and / or reception interval is purely vertical translational motion.

[0245] In this way, by utilizing the friction caused by gravity, it becomes possible to approach and / or release the foil sheet precisely while avoiding undesirable horizontal movement.

[0246] Preferably, the approach movement is the same as the movement performed by the delivery direction control device and the stacking surface.

[0247] This precise cooperative mechanism minimizes damage and deflection during the formation of the laminated structure, ensuring that the foil sheets are released while the tension of the separator strip remains constant. This is because the accumulation section can be selectively determined, and the entire system translates vertically and moves from an approaching state to an extended state while the first or second foil sheet is being released, thereby enabling continuous movement of the laminated surface.

[0248] Preferably, the method includes the step of moving the delivery direction control device and / or the stacking surface, respectively, by a first and / or second handling device. This allows the delivery direction control device and / or the stacking surface to be moved relative to each other while following a reference delivery direction, and maintains an absolute deviation angle greater than 60 degrees, more preferably greater than 70 degrees, and even more preferably greater than 80 degrees, if the end section has an extension of more than 1 / 3 of the maximum length between the first and second constraint positions of the separator strip relative to the stacking surface.

[0249] The applicant has found that these characteristics make it possible to move the stacked surface quickly, effectively, and reversibly in a small space from a deviation angle equal to +60 to -60 degrees, more preferably +70 to -70 degrees, and even more preferably +80 to -80 degrees, and thereafter extend most of the end section of the separator strip according to a substantially constant deviation angle, thereby substantially preventing deflection in the conveyor belt.

[0250] In this way, by reducing the elongation of this section, it becomes possible to minimize the deflection phenomenon of the strip section configured downstream of the delivery direction control device.

[0251] Preferably, the method includes the step of moving the handling unit the delivery direction control device and / or the stacking surface, respectively, such that a first distance between the delivery direction control device and the stacking surface, measured according to a reference delivery direction, is maintained at 0 to 30 mm, more preferably 0 to 15 mm, and even more preferably substantially 0 mm.

[0252] In this way, the applicant has found that it is possible to maintain a sufficiently small distance between the feed direction control device and the stacking surface. This distance is preferably defined taking into account the overall dimensional constraints of the motion mechanism involved.

[0253] This solution further reduces the elongation in this section, minimizing the deflection phenomenon in the strip section configured downstream of the delivery direction control device.

[0254] Preferably, the first distance is substantially constant for at least 40%, more preferably at least 50%, more preferably at least 80%, and even more preferably 100% of the operating time of the second work path.

[0255] In this way, deflection phenomena can be effectively reduced for most of the process steps related to the unwinding and stacking of separator strips. The first distance is maintained at a predetermined value over time. Furthermore, it is possible to provide limited variations within a predetermined range of this first distance, specifically aimed at providing additional advantages while maintaining a high overall process speed without compromising the tension state or damaging the stacked separator strips.

[0256] Preferably, the method includes the step of moving the feed direction control device relative to the stacking surface by a handling unit to define a second distance between the feed direction control device and the stacking surface. • When the deviation angle is between +80 degrees and -80 degrees, the second distance is minimized, and / or • If the deviation angle is between +81° and +100°, or between -81° and -100°, the second distance is selectively extended.

[0257] This solution allows for greater flexibility, adaptability, and modularity in the process. This makes it possible to maintain constant tension in the separator strip while maintaining a high process speed, even when the elongation of the end sections of the separator strip is changed, without significantly affecting the deflection phenomenon.

[0258] Preferably, when the deviation angle is between +80 degrees and -80 degrees, the second distance is substantially equal to the first distance.

[0259] In this way, the end sections of the separator strip are kept as small as possible to reduce or eliminate the deflection phenomenon that may potentially occur when the strip must undergo a large change in angular orientation, that is, when the value of the deviation angle changes.

[0260] Preferably, when the deviation angle is between +81 degrees and +100 degrees, or between -81 degrees and -100 degrees, the second distance between the first constraint position and the second constraint position is between 0% and 10% of the maximum length.

[0261] This technical solution also makes it possible to further vary the extension of the end sections depending on the specific form of the laminated structure formed and / or to avoid interference with the motion mechanism provided in the device.

[0262] Preferably, the separator strips are supplied continuously, preferably at a substantially constant supply rate.

[0263] In this way, it becomes possible to perform all desired process steps, including those related to stopping movement, while maintaining a continuous supply of strips, and the apparatus designed to manage these operational steps can be simplified.

[0264] Furthermore, this step minimizes the tension that may occur in the separator strip.

[0265] Preferably, the method includes the step of releasing a plurality of first and second foil sheets by interposing a folded section of a laminated separator strip between the first and second foil sheets.

[0266] In this way, by interposing foil sheets, more preferably electrodes, between multiple folded layers, and effectively separating the multiple contained sheets, it becomes possible to proceed with the formation of a laminated structure of the separator strip.

[0267] Preferably, the foil sheet is an electrode, more preferably a cathode or anode.

[0268] Preferably, the anodes and cathodes inserted into the laminated structure of the separator strips are arranged one per layer and alternately with respect to each other.

[0269] Preferably, the separator strip is an electrically insulating polymer strip.

[0270] In this way, it becomes possible to form a laminated structure that houses a foil sheet suitable for use in an electrochemical cell.

[0271] In a further embodiment, the present invention relates to a lamination apparatus for laminating separator strips and foil sheets.

[0272] Preferably, the lamination apparatus includes a lamination unit.

[0273] Preferably, the lamination unit includes a lamination surface configured to receive separator strips and foil sheets.

[0274] Preferably, the lamination apparatus includes a supply unit configured to supply separator strips along a supply path.

[0275] Preferably, the supply unit includes a delivery direction control device located immediately upstream of the stacking unit.

[0276] Preferably, the lamination apparatus includes a handling unit which includes a first handling device configured to move a delivery direction control device along a first work path while the lamination surface is moving.

[0277] Preferably, the handling unit includes a second handling device configured to move the stacked surface along a second work path.

[0278] Preferably, the first and second handling devices are configured to move the delivery direction control device and the laminated surface by mutual movement that is substantially translational in a direction parallel to the laminated surface, by guiding the separator strip so that the separator strip contacts the laminated surface or overlaps with a portion of the separator strip constrained parallel to the laminated surface.

[0279] In this way, by reducing or controlling the damage that the conveyor belt receives as a function of deflection, it becomes possible to improve the execution of the lamination process. [Brief explanation of the drawing]

[0280] The features and advantages of the present invention will become more apparent from the following detailed description relating to exemplary embodiments shown with reference to the accompanying drawings, as non-limiting examples. [Figure 1] This is a schematic front view illustrating the apparatus according to the present invention. [Figure 2] This is a schematic front view showing the apparatus according to the present invention during an operation step. [Figure 3] This is a schematic front view showing the apparatus according to the present invention during an operation step. [Figure 4] This is a schematic front view showing the apparatus according to the present invention during an operation step. [Figure 5] A front view schematically showing the apparatus according to the present invention during an operation step. [Figure 6] A perspective view of the apparatus realized according to the present invention. [Figure 7] A front view schematically showing the apparatus according to the present invention during a further operation step. [Figure 8] A front view schematically showing the apparatus according to the present invention during a further operation step. [Figure 9] A front view schematically showing the apparatus according to the present invention during a further operation step. [Figure 10] A front view schematically showing the apparatus according to the present invention during a further operation step. [Figure 11] A front view schematically showing the apparatus according to the present invention during a further operation step. [Figure 12] A front view schematically showing the apparatus according to the present invention during a further operation step. [Figure 13] A front view schematically showing details of a laminated structure that can be formed by the apparatus according to the present invention. [Figure 14] A schematic diagram showing details of an operation step of the apparatus according to the present invention. [Figure 15] A schematic diagram showing details of an operation step of the apparatus according to the present invention. [Figure 16] A schematic diagram showing details of an operation step of the apparatus according to the present invention. [Figure 17] A schematic diagram showing details of an operation step of the apparatus according to the present invention. [Figure 18] A schematic diagram showing details of an operation step of the apparatus according to the present invention. [Figure 19a] A front view without scale schematically showing details of an operation step of the apparatus according to the present invention. [Figure 19b] A front view without scale schematically showing details of an operation step of the apparatus according to the present invention. [Figure 19c] A front view without scale schematically showing details of an operation step of the apparatus according to the present invention. [Modes for carrying out the invention]

[0281] First, referring to Figures 1 and 2, a lamination apparatus 100 for laminating separator strips NS and foil sheets, realized according to the present invention, is shown as a whole by reference numeral 100.

[0282] In a preferred embodiment, the apparatus 100 is intended to carry out lamination of separator strips NS for the purpose of manufacturing an electrochemical cell.

[0283] However, it should be noted that this is merely an example of possible embodiments, and the apparatus 100 according to the present invention may also be intended to laminate separator strips for different applications in fields other than those related to the manufacture of electrochemical cells.

[0284] For example, in the field of energy storage, the present invention may be applied to the formation of other stacked elements intended for batteries or supercapacitors.

[0285] For example, in some embodiments as shown in Figure 1, the apparatus 100 may be used in connection with a production line for a laminated structure S for an electrochemical cell. Here, separator strips NS are folded and laminated, thereby creating an overlap of layers and allowing electrode foil sheets to be interposed between the layers.

[0286] A separator strip NS is, for example, a polymer strip that has the function of electrically insulating electrode foil sheets interposed between different layers.

[0287] According to several embodiments, the separator strip NS may be made of a single material or may be a multilayer structure including multiple overlapping layers.

[0288] Polyethylene is an example of such a material used as a separator strip.

[0289] The laminated structure S of the separator strip NS is a continuous layer formed by seamlessly folding.

[0290] Referring to Figure 11, two electrode foil sheets, or more simply the electrodes, are indicated by reference numerals 201 and 301. These are placed on a separator strip NS during the lamination step to form a laminated structure S, which can then proceed to the completion of the electrochemical cell.

[0291] In particular, the cathode foil sheet is indicated by reference numeral 201, and the anode foil sheet is indicated by reference numeral 301. Aluminum is an example of a material that can be used as a cathode in the form of a foil sheet, and copper is an example of a material that can be used as an anode in the form of a foil sheet.

[0292] In its general configuration, the apparatus 100 realized according to the embodiment shown in the attached drawings includes a supply unit 20, a lamination unit 1, a handling unit 130, and first and / or second discharge assemblies of foil sheets 200 and 300.

[0293] In a preferred embodiment, the separator strip NS is supplied by a special discharge device (not shown). For example, this separator strip NS discharge device may be formed by a large reel from which the separator strip NS is collected so as to be unwound and thus continuously supplied during the operation of the device.

[0294] The separator strips NS supplied by the discharge device are then discharged toward the supply unit 20. In a preferred embodiment, the supply unit 20 is a unit that deals with optimizing the transport and management of the separator strips NS before they are stacked by the relative stacking unit 1. Its characteristics are described in detail below.

[0295] According to a preferred embodiment, the supply unit 20 preferably includes an inlet section (not shown) adapted to receive the separator strip NS from a discharging device, and an outlet section 22 (shown in FIG. 3) that exits from the supply unit 20 such that the separator strip NS is supplied to the stacking unit 1. The stacking unit 1 includes a stacking surface 10 adapted to receive the separator strip NS so as to enable stacking of the separator strip NS.

[0296] In this way, a supply path PA of the separator strip NS is defined between the inlet section and the outlet section.

[0297] It should be noted that the separator strip NS can pass through, for example, a further unit for performing pre-treatment of the strip before being supplied to the supply unit 20. For example, the separator strip may be subjected to pre-cleaning, laser ablation or surface activation treatment in order to homogenize its surface properties.

[0298] In a preferred embodiment, the separator strip NS is continuously supplied to the supply unit 20.

[0299] In other words, the separator strip NS is introduced into the supply unit 20 without ever stopping and proceeds at a speed greater than zero, preferably substantially constantly.

[0300] However, in some cases, due to the need for other operations related to the particular process being carried out, it is necessary to provide an interruption in the continuous supply or to reduce the progress of the separator strip NS.

[0301] According to some embodiments, it is possible to continuously unwind the separator strip NS at a constant speed without interrupting the supply and unwinding of the separator strip NS. This ensures that the relative motion mechanism is always in motion and the tension state is always maintained, thereby reducing or avoiding sudden acceleration and deceleration of the handling device.

[0302] For this purpose and other purposes, the existence of a storage device configured to store separator strips NS can be provided.

[0303] As shown in the embodiment examples in Figures 1, 6, 11, and 12, the storage device included in the supply unit 20 may include a first direction control device R1 provided in the supply path PA. The first direction control device R1 is positioned upstream of the delivery direction control device R2 with respect to the unwinding direction of the separator strip NS. This allows at least one storage section T of the separator strip NS to be identified between the first direction control device R1 and the delivery direction control device R2.

[0304] According to a preferred embodiment, the apparatus 100 includes a handling unit 130, which includes a first handling device 131.

[0305] According to the embodiment shown in Figures 11 and 12, the first handling device 131 is • An approach state CR in which the delivery direction control device R2 is at the minimum distance from the first direction control device R1, the minimum distance being measured according to the length of the separator strip NS placed between the first direction control device R1 and the delivery direction control device R2, • An extended state CE in which the delivery direction control device R2 is at its maximum distance from the first direction control device R1, the maximum distance being measured according to the length of the separator strip NS located between the first direction control device R1 and the delivery direction control device R2, The system is configured to move the transmission direction control device R2 between these points.

[0306] The amount of accumulated strips is variable, and may be configured so that the length of the separator strip NS accumulated between each step of the process can change to meet the specific needs described above.

[0307] According to a preferred embodiment, the handling unit 130 includes an additional handling device (not shown) configured to move the first directional control device R1 to further determine a desired amount of separator strips NS located in the storage section T.

[0308] Continuing to refer to Figures 1, 6, 11, and 12, the first direction control device R1 is preferably a driven accompanying roller, and the delivery direction control device R2 includes two opposing rollers R2a and R2b through which the separator strip NS is passed.

[0309] According to a preferred embodiment, two (or four) opposing rollers R2a and R2b provided on the delivery direction control device R2 have equal diameters and are driven or rotated in opposite directions around a central axis of rotation, either by direct movement via a strip, chain, or similar technical solution, or by motor drive.

[0310] As shown in the embodiment in Figure 6, a further driven roller, constrained to a fixed position, is provided in the storage section T, which is located between the first direction control device R1 and the delivery direction control device R2, enabling the separator strip NS to be wound and guided in a controlled manner.

[0311] More preferably, the supply unit 20 includes at least one tension control device, preferably a buffering element located in the storage section T.

[0312] Continuing to refer to Figure 1, a first handling device 131 is schematically shown. This may include, for example, a horizontal guide, a vertical guide, or a combination thereof.

[0313] Continuing to refer to Figure 1, the first handling device 131 of the delivery direction control device R2 is configured to move the delivery direction control device R2 along the first work path P1.

[0314] As shown in the embodiments of Figures 1, 11, and 12, the first work path P1 is preferably a linear section, more preferably perpendicular to the lamination surface 10, and even more preferably oriented in the vertical direction.

[0315] In fact, as shown in Figures 11 and 12, the two rollers R2a and R2b preferably perform purely vertical translation along the first working path P1, moving reversibly between an approach state CR and an extended state CE. The key point here is that during this movement, the separator strip NS always maintains the same angular orientation in the storage section T. In other words, the two rollers R2a and R2b perform purely vertical translation along the storage section T, but their orientation relative to the separator strip NS does not change, i.e., no change in the strip's inclination occurs during such movement. This means that the separator strip NS in the storage section T is not subjected to hydrodynamically non-uniform lateral pressure conditions, and is therefore not subject to deflection phenomena and associated potential damage.

[0316] In this way, by changing the distance between the accompanying roller provided on the first direction control device R1 and the two rollers R2a and R2b provided on the delivery direction control device R2, it becomes possible to change the length of the path that the separator strip actually travels, thereby enabling the accumulation of a desired amount.

[0317] Thus, considering, for example, the embodiment shown in Figure 12, the length of the separator strip NS located in the storage section T can be increased by lowering the two rollers R2a and R2b, and given that the supply speed entering the supply unit 20 is constant or substantially constant, the downstream portion of the strip of the two rollers R2a and R2b can be slowed down or stopped without stopping the supply of the separator strip NS.

[0318] Such solutions will be described in more detail in the embodiments described later.

[0319] It should also be noted that, in a preferred embodiment, the actions of the two rollers R2a and R2b, or more generally the feed direction control device R2, can be associated with a separator strip NS holding device (not shown) configured to selectively control the movement of the separator strip NS.

[0320] For example, in some embodiments, a gripper (not shown) or other similar retaining element may be provided to control the movement of a separator strip portion NS. This retaining element acts on the separator strip when its control, retention, or stopping is required.

[0321] Advantageously, the gripper may be movable to further adjust the relative strip feeding rate by controlling its movement.

[0322] Furthermore, the gripper can be associated with a relative knife. The knife can be used to cut the laminated separator strips NS as needed, thereby creating an interruption in the continuity of the strips within the laminated structure S. This can be done, for example, at the completion of the lamination step of the separator strips NS on the lamination surface 10.

[0323] Furthermore, the rollers provided in the first direction control device R1 and the delivery direction control device R2 allow for the control of the passing separator strip NS by assigning it a specific direction (according to the relative positions of the rollers, its diameter, etc.), and therefore, it is important that the orientation of the separator strip NS in space can be effectively controlled.

[0324] In a preferred embodiment, the accompanying roller provided on the first direction control device R1 is preferably attached to a buffer element or similar technical solution that allows the orientation of the separator strip NS to be changed by tilting or moving the axis of rotation of the accompanying roller itself.

[0325] Next, referring to Figures 1 to 12, the stacking unit 1 is positioned immediately downstream of the supply unit 20 and is configured to receive the separator strip NS that is moved by the supply unit 20.

[0326] Preferably, the separator strip NS is supplied by moving along the supply direction, while the delivery direction control device R2 is designed to provide a reference delivery direction DRU (i.e., final angular orientation). The reference delivery direction DRU corresponds to the direction the separator strip NS can take, in which it is free to continue its imposed motion without intervention from constraints and motion mechanisms located downstream of the delivery direction control device R2.

[0327] For example, as shown in Figures 3, 6, and 8, the reference delivery direction DRU is preferably perpendicular.

[0328] In the embodiment shown in Figure 9, the reference discharge direction DRU applied to the separator strip NS by the two rollers R2a and R2b is horizontal. More practically and clearly, an orientation angle α is defined, which represents the angle that the reference discharge direction DRU makes with respect to the vertical direction of the environment in which the device 100 is installed.

[0329] In this regard, it should be noted that in the embodiment shown in Figure 5, for example, the configuration of the separator strip NS relative to the delivery direction control device R2 determines the vertical reference delivery direction DRU and the value of the orientation angle α equal to, for example, 0 degrees, while Figure 9 shows an embodiment related to the horizontal reference delivery direction DRU and the relative value of the orientation angle α equal to 90 degrees.

[0330] Referring, for example to Figure 1 or Figure 2, the end section of the separator strip NS defined downstream of the delivery direction control device R2 and upstream of the first constraint position PV1 or the second constraint position PV2 of the separator strip NS with respect to the stacking surface 10 is indicated by reference numeral TF.

[0331] In the preferred embodiments shown in Figures 11 and 12, it should be noted that the first restraint position PV1 corresponds to the intervention point of the first blocking device 51, and the second restraint position PV2 corresponds to the intervention point of the second blocking device 52, which is located within the stacking unit 1 and acts on the stacking surface 10. More precisely, referring only to Figure 12, the first blocking device 51 is located distal to the delivery direction control device R2, while the second blocking device 52 is located proximal to the delivery direction control device R2.

[0332] According to a preferred embodiment, the first blocking device 51 and / or the second blocking device 52 are grippers, suction cups, or electromagnetic systems adapted to integrally and selectively hold a portion of the separator strip NS with the lamination surface 10.

[0333] For example, according to some embodiments as shown in Figure 11, the stacking unit 1 includes a plurality of block devices 51 and 52.

[0334] Referring to Figure 11, it can be seen that the separator strip NS is constrained by the second blocking device 52. In this state, the end section TF is defined downstream of the delivery direction control device R2 and the second blocking device 52.

[0335] It is clear that when the first block device 51 is activated, the end section TF changes its extension and relative deviation angle β.

[0336] According to several embodiments, the laminated surface 10 has a substantially planar unfolded portion having a substantially rectangular base. Its size can be determined according to the desired form of the laminated structure S to be formed.

[0337] Furthermore, the relative positions of the first block device 51 and / or the second block device 52 can be defined or modified according to the desired configuration of the laminated structure S. In other words, the first block device 51 and / or the second block device 52 are constrained in such a way that coplanar and / or vertical translational movement with respect to the laminated surface 10 is permitted.

[0338] For example, according to some embodiments as shown in Figure 11, the stacking unit 1 includes a plurality of block devices 51 and 52.

[0339] Furthermore, referring to Figure 11, it can be seen that the separator strip NS is constrained by the second blocking device 52. In this state, the end section TF is defined downstream of the delivery direction control device R2 and the second blocking device 52.

[0340] It is clear that when the first block device 51 is activated, the end section TF changes its extension and relative deviation angle β.

[0341] This occurs because the first block device 51 defines the extension and angular orientation of the end section TF.

[0342] Generally, the operation of a block system interposed between the upstream delivery direction control device R2 and the further downstream block device, which enables the removable restraint of the separator strip NS on the stacked surface 10, constantly causes changes in the elongation of the end sections and, in some cases, changes in the relative deviation angle β.

[0343] As described above, and as shown in Figures 11 and 12, for example, the extension and orientation of the end section TF can change significantly and rapidly depending on whether the block device is engaged on the separator strip NS. In fact, when the gripper acts on a portion of the separator strip NS and constrains it integrally with the stacking surface 10, it is clear that this portion does not undergo further changes relative to the stacking surface and moves with the stacking surface as if defining a single rigid body. Therefore, it should be noted that the portion of the separator strip NS that is not yet constrained with respect to the stacking surface 10 and is located downstream of the delivery direction control device R2 is identified as the end section TF described above. This end section TF has the characteristic that its extension and spatial orientation can be significantly changed before it is further constrained and moves integrally with the stacking surface 10.

[0344] Preferably, and also with reference to, for example, Figures 3, 5, and 8, an embodiment is shown in which the end section TF is identifiable downstream of the delivery direction control device R2 and is oriented according to a deviation direction DD that defines a deviation angle β with respect to the reference delivery direction DU.

[0345] Furthermore, as shown in Figures 3, 5, and 8, the deviation angle β can vary from approximately +100 degrees to -100 degrees with respect to the reference delivery direction DRU.

[0346] This angular change in the end section TF allows for stacking on the stacking surface 10 by first folding in one direction and then in the opposite direction, thereby forming a series of continuous overlapping layers as shown in Figure 13.

[0347] Referring to Figure 13, it should be noted that the two blocking devices 51 and 52 acting on the first restraint position PV1 and the second restraint position PV2, respectively, can act simultaneously or at different timings on the portion of the restrained separator strip NS.

[0348] According to a preferred embodiment, the blocking device operates by blocking the separator strip NS while lamination is progressing, at the point when the new separator strip layer NS is guided to substantially contact the lamination surface 10 or the layer below the lamination structure S.

[0349] Referring to Figure 6, it is interesting to see how the reference discharge direction DRU corresponds to the longitudinal axis of the outlet-side plane PU, which is coplanar with the separator strip NS, in the discharge direction control device R2.

[0350] Furthermore, referring to Figure 6, it should be noted that, according to a preferred embodiment, the reference plane PR spanning the second path P2 coincides with the exit-side plane PU.

[0351] According to one embodiment, the apparatus 100 includes a handling unit 130 which includes a first handling device 131 and / or a second handling device 132. The handling unit 130 is configured to move the delivery direction control device R2 and / or the stacking surface 10 relative to each other. This allows the delivery direction control device R2 and / or the stacking surface 10 to move in accordance with the reference delivery direction DRU, and when the end section TF has an extension exceeding 1 / 3 of the maximum length between the first constraint position PV1 and the second constraint position PV2 of the separator strip NS relative to the stacking surface 10, the deviation angle β is maintained to exceed 60 degrees in absolute value, more preferably exceeding 70 degrees, and even more preferably exceeding 80 degrees. Preferably, the maximum length is measured along a direction perpendicular to the outlet side plane PU.

[0352] In fact, considering the contents shown in Figures 1, 2, 6, 11, and 12, it should be noted that the first handling device 131 moves the delivery direction control device R2 in accordance with the movement caused by the stacking surface 10 by the second handling device 132. Preferably, the second handling device 132 may include, for example, a horizontal guide, a vertical guide, or a combination thereof.

[0353] According to a preferred embodiment, the movement produced by the handling device 131 is configured to be purely vertical translational motion. Since the first handling device 131 and the second handling device 132 are configured to follow each other, the second handling device 132 moves the stacking surface 10 by the same amount as the vertical translational motion performed by the delivery direction control device R2.

[0354] Referring, for example, to Figures 1 and 2, it can be seen that the movement of the stacked surface 10 caused by the second handling device 132 defines a second work path P2. This second work path P2 corresponds to a complex, closed path with both horizontal and vertical moving elements, such as a bifurcated or elongated arch shape. However, the second work path P2 is configured to move itself to coincide with the first work path P1 of the delivery direction control device R2.

[0355] In other words, the second work path P2 is configured to include a vertical translational component that is substantially equal in extension to the pure vertical translational motion performed by the delivery direction control device R2 in accordance with the first work path P1. In Figure 2, this pure vertical translational component included in the first work path P1 and the second work path P2 is indicated by reference numeral V1.

[0356] This means that while the stacking surface 10 moves vertically in alignment with the delivery direction control device R2, further movement occurs in addition to this, depending on the horizontal component.

[0357] In this way, by rapidly changing the deviation angle β, the horizontal movement of the stacking surface 10 can be performed quickly. As a result, the extended portion of the end section TF of the separator strip NS approaches the stacking surface 10 with a short movement along the second operating path P2, and the contact state between the end section TF and the stacking surface 10 is achieved when the deviation angle β is approximately +90 degrees or -90 degrees.

[0358] In other words, referring to Figure 7, the handling unit 130 is configured to move the delivery direction control device R2 relative to the stacking surface 10. This allows the first distance D1 between them to be kept substantially constant while the stacking structure of the separator strips NS is being formed, when the first distance D1 between them is measured along the reference delivery direction DRU. This first distance D1 is 0 to 30 mm, more preferably 0 to 15 mm, and even more preferably substantially equal to 0 mm.

[0359] As is clear from Figures 1 and 6, and as mentioned above, the first distance D1 is preferably measured along the vertical direction and is always kept as constant as possible between 0 and 30 mm, excluding the overall space occupied by the related motion mechanism.

[0360] Furthermore, since the only constraint condition is the distance along the vertical, the above value can be maintained even when the stacked surface 10 moves horizontally by more than 30 mm.

[0361] In a preferred embodiment, referring to Figure 8 and in particular Figure 10, when the value of the deviation angle β is close to, for example, +90 degrees or -90 degrees, the first handling device 131 and the second handling device 132 are configured to generate a relative movement SR between the lamination surface 10 and the delivery direction control device R2, thereby maintaining the same deviation angle β with respect to the reference delivery direction DRU substantially constant, even when the elongation of the end section TF of the separator strip NS varies by 20% to 90% of the maximum length between the first constraint position PV1 and the second constraint position PV2 of the separator strip NS relative to the lamination surface 10. This minimizes the surface area of ​​the strip that is exposed to changes in hydrodynamic lateral pressure that occur in response to changes in the unwinding angle of the separator strip NS while the lamination structure of the separator strip NS is being formed.

[0362] In fact, when the stacking surface 10 moves along a second work path P2, for example, away from the feed direction control device R2, with a deviation angle β of 85 degrees ± 10% in absolute value, this configuration requires that the feed direction control device R2 follows the movement of the stacking surface 10 according to at least one component, and maintains the first distance D1 to be substantially constant. As a result, the relative movement of the stacking surface 10 with respect to the feed direction control device R2 becomes a horizontal movement with a deviation angle β of substantially +90 degrees or -90 degrees. This makes it possible to avoid the occurrence of deflection in the end section TF of the separator strip NS.

[0363] Referring to Figures 3 and 4, a specific state is shown in which the deviation angle β is substantially 0 degrees.

[0364] Continuing to refer to Figure 3, an embodiment is shown in which the reference plane PR spanning the second path P2 intersects with the exit section 22.

[0365] According to the embodiment shown in Figure 15 and other figures, when the deviation angle β is substantially +90 degrees or -90 degrees, the first distance D1 changes as follows. When approaching the laminated surface, the first distance D1 changes from a constant value to a value between the first distance D1 and 200% thereof. When moving away from the laminated surface, the distance changes from a constant value of the first distance D1 to a value between the first distance D1 and 200% of that value.

[0366] Referring to Figures 19a, 19b, and 19c, several points in time are shown in detail regarding the change in the first distance D1 as the feed direction control device R2 and the stacking surface 10 move toward each other. In this example, the first distance D1 is measured along the vertical axis Z. More specifically, Figure 19a schematically shows the state where the first distance D1 is 10 mm and the approaching movement begins. For the sake of simplicity and for illustrative purposes, consider the case where the feed direction control device R2 is substantially stationary and the stacking surface 10 moves toward the reference feed direction DRU, i.e., upward. In Figure 19b, it can be seen that the stacking surface 10 has reached the height of the feed direction control device R2 and the first distance D1 is substantially 0. Figure 19c shows the point in time when the stacking surface 10 continues the motion shown in Figure 19b in the same direction and orientation, with an additional vertical upward movement of the same modulus of elasticity as the initial value of the first distance D1. In this configuration, the deviation angle β is substantially 110 degrees.

[0367] Referring to Figure 2, the handling unit 130 is configured to move the delivery direction control device R2 relative to the stacking surface 10 by defining a second distance D2 between the delivery direction control device R2 and the stacking surface 10. • When the deviation angle β is between +80 degrees and -80 degrees, the second distance D2 decreases to its minimum, and / or • If the deviation angle β is between +81° and +100°, or between -81° and -100°, the second distance D2 is selectively extended.

[0368] Continuing to refer to Figure 2, the second distance D2 is identified as the minimum distance between any part of the delivery direction control device R2 and any part of the stacked surface 10.

[0369] Therefore, preferably, when the deviation angle β is between +80 and -80 degrees, it can be clearly stated that the second distance D2 is substantially equal to the first distance D1. This satisfies the conditions provided for the first distance D1 between 0 mm and 30 mm.

[0370] Furthermore, according to a preferred embodiment, when the deviation angle β is between +81 degrees and +100 degrees, or between -81 degrees and -100 degrees, the second distance D2 between the first constraint position PV1 and the second constraint position PV2 is between 0% and 70% of the maximum length.

[0371] Alternatively, according to another preferred embodiment, when the deviation angle β is between +81° and +100°, or between -81° and -100°, the second distance D2 between the first constraint position PV1 and the second constraint position PV2 is between 0% and 10% of the maximum length.

[0372] Preferably, according to embodiments shown in Figures 11, 16, and 17, the apparatus includes a first foil sheet release unit 200 and a second foil sheet release unit 300 provided for a second handling device 132. These release units 200 and 300 are configured to release a first foil sheet 201 or a second foil sheet 301 to a portion of a separator strip NS on the lamination surface 10 at a minimum release distance DmR from the lamination surface 10. This release is performed when the first foil sheet release unit 200 or the second foil sheet release unit 300 makes an approach movement Mac toward the lamination surface 10 in the receiving section TR of the second operating path P2. The approach movement Mac is configured to produce a state in which the relative velocity between the first foil sheet release unit 200 and / or the second foil sheet release unit 300 and the lamination surface 10 is substantially zero, and furthermore, at least one moving element is parallel to the reference delivery direction DRU, preferably perpendicular to the lamination surface 10, and more preferably in the vertical direction.

[0373] According to several embodiments, a first discharge assembly 200 and / or a second discharge assembly 300 of a foil sheet includes corresponding first and second moving devices 210 and / or 310 configured to selectively move the first discharge assembly 200 and / or the second discharge assembly 300 of the foil sheet in response to an approach movement Mac.

[0374] Preferably, the first moving device 210 and / or the second moving device 310 are motion mechanisms having two degrees of freedom, and more preferably, they include a horizontal guide and a vertical guide.

[0375] According to the preferred embodiments shown in Figures 16 and 17, the approach movement Mac substantially begins when the first direction control device R1 and the delivery direction control device R2 are in the approach state CR, and substantially ends when the first direction control device R1 and the delivery direction control device R2 are in the extended state CE.

[0376] Referring to Figure 16, the device 100 is shown at the first stacking position Pip1. This position corresponds to the opposite side of the second stacking position Pip2 (not shown), which is located on the opposite side of the reference delivery direction DRU.

[0377] As shown in Figure 16, the first lamination position Pip1 starts from the approach state CR. Next, considering a preferred embodiment with reference to Figures 2 and 17, this overall configuration means that the discharge direction control device R2 moves vertically away from the first direction control device R1, which performs a purely vertical movement V1, and transitions from the approach state CR to the stretched state CE, while the second discharge assembly 300 of the lamination surface 10 and foil sheet also performs a movement with the same vertical component V1. This achieves substantially identical, aligned, or integrated movement states with respect to the vertical component among the three different devices in this process step.

[0378] This precise cooperative mechanism allows for the release of the second electrode 301 while minimizing potential damage to the formed laminated structure S. This is achieved by minimizing deflection by maintaining the first distance D1 between 0mm and 30mm, ensuring constant tension in the separator strip NS by selectively setting the accumulation section T, and enabling continuous movement of the laminated surface 10 as the entire system continues to move vertically from an approaching state to an extended state during the release of either the first electrode 201 or the second electrode 301.

[0379] Furthermore, this cooperative mechanism also operates similarly when the first electrode 201 is emitted by the second emission assembly 300 of the foil sheet.

[0380] Preferably, referring to Figure 11, the first release assembly 200 and the second release assembly 300 of the foil sheets each include a first retaining device 230 or a second retaining device 330, respectively. The first retaining device 230 or the second retaining device 330 is configured to selectively hold the first foil sheet 201 or the second foil sheet 301, for example, before and during an approach movement Mac, and to release the first foil sheet 201 or the second foil sheet 301 by deactivating the operation of the first retaining device 230 or the second retaining device 330, for example, at the end of the approach movement Mac.

[0381] These first retaining devices 230 and second retaining devices 330 are vacuum systems such as suction cups.

[0382] According to one embodiment, the second handling device 132 is configured to move the stacked surface 10 along the receiving section TR of the second work path P2 so as to approach the first moving device 210 and / or the second moving device 310 during the approach movement Mac.

[0383] This technical solution makes it possible to reduce the approach timing and increase the relative speed during the approach step between the laminated surface 10 and the first or second discharge assembly 200 or second discharge assembly 300 of the foil sheet.

[0384] According to a further embodiment, the second handling device 132 is configured to move the laminated surface 10 along the receiving section TR of the second work path P2 so as to move away from the first handling device 210 and / or the second handling device 310 during an approach movement Mac. The approach is performed depending on the difference in travel speed between the laminated surface 10 and the release assembly of the first release assembly 200 or the second release assembly 300 of the foil sheet.

[0385] In this way, the laminated surface 10 and the first release assembly 200 or the second release assembly 300 of the foil sheet come closer to each other, enabling a slower and less abrupt release.

[0386] The present invention also relates to an implementation of a method 500 for forming a laminated structure S of separator strips NS, preferably a laminated structure S of an electrochemical cell intended for the manufacture of a battery.

[0387] The method 500 provides the step of arranging an apparatus 100 which includes a supply unit 20, a handling unit 130, a lamination unit 1, and a fixed frame that restrains a first discharge assembly 200 or a second discharge assembly 300 of foil sheets.

[0388] The handling unit 130 includes a vertical guide 131 that enables purely vertical translation of two rollers R2a and R2b that are opposite to each other and rotate in opposite directions, and a horizontal and vertical composite guide 132 that enables complex movement in space, which will be described in more detail below. According to an alternative embodiment, the delivery direction control device R2 includes four rollers.

[0389] The stacked surface 10 is attached to a device that is integrally constrained by a composite guide 132 in the horizontal and vertical directions.

[0390] The vertical guide 131 and the combined horizontal and vertical guide 132 are mounted on a fixed frame of the device 100 and are guided by motor drive.

[0391] Downstream of the discharge region (not shown), the path of the separator strip NS passes through the supply unit 20. More specifically, referring to Figures 1, 16, and 17, the separator strip NS passes through a storage section T provided in the supply unit 20. The storage section T is defined between an accompanying roller R1 and two rollers R2a and R2b located at the exit of the storage section T itself.

[0392] Downstream of the two rollers R2a and R2b, the conveyor belt is stably restrained to the stacking surface 10 by the gripper 52.

[0393] To further clarify and complete the explanation, Table 1 is provided, showing an example of the operation sequence performed by the apparatus 100 according to method 500 to form the laminated structure S.

[0394] [Table 1]

[0395] Referring to Table 1 and Figure 18, it can be seen that in step 1, the end section TF of the separator strip NS is oriented along an angle of deviation β equal to 0 degrees.

[0396] The end section TF is measured just downstream of the last contact point between the roller R2b and the separator strip NS, and just upstream of the contact point between the first gripper 52 and the separator strip NS.

[0397] The length of the end section is approximately 12 mm. The first distance D1 is equal to 7 mm, and the second distance D2 is equal to the first distance D1.

[0398] Furthermore, Figure 18 shows a second closed work path P2 formed by the combined horizontal and vertical guides 132. Here, its substantial bifoliate shape (similar to a horizontally positioned infinity symbol) is shown, having substantially straight and vertical lateral paths (as can be seen from the parallelism between these parts of the second work path P2 and the illustrated vector triangle where Z represents the vertical axis).

[0399] Furthermore, in step 1, the accompanying roller R1 and the two opposing rollers R2a and R2b, which rotate in opposite directions, are in the stretched state CE. The accumulation section T is measured along the length of the separator strip NS, from the horizontal diameter of the accompanying roller R1 to the horizontal diameters of the two opposing rollers R2a and R2b, which rotate in opposite directions.

[0400] In step 2, referring to Figure 18, the stacking surface 10 is simultaneously moved to the right (corresponding to an increase in coordinate position Y) and upward (corresponding to an increase in coordinate position Z). The separator strip NS is still held by the second gripper 52 (see, for example, Figure 5).

[0401] Simultaneously, the two opposing rollers R2a and R2b, which rotate in opposite directions, are moved by the vertical guide 131 from the extended state CE to the approach state CR and rise vertically (corresponding to an increase in coordinate position Z).

[0402] As can be seen from Figure 18 and Table 1, the deviation angle β increases from 0 degrees to 90 degrees.

[0403] The figures shown in Figures 1-5 and 7-18 are represented two-dimensionally in the plane YZ region.

[0404] Therefore, this specification does not describe conditions under which the change in position along X becomes large.

[0405] Furthermore, referring to Figure 6, it can be seen that movement along axis X of the separator strip NS, and consequently the outlet-side plane PU, carries the risk of causing displacement and / or twisting of the strip itself, which could complicate or impair the effectiveness of the present invention.

[0406] In step 3, referring to Figure 16, during pure vertical translational motion, the two opposing rollers R2a and R2b, rotating in opposite directions, reach a proximity state CR, the deviation angle β is substantially equal to 90 degrees, and the stacked surface 10 is sandwiched to the right of the two rollers R2a and R2b.

[0407] The separator strip NS is substantially in contact with the surface 10 and is further blocked by the first gripper 51.

[0408] Referring further to Figure 16, at the end of step 3, the second emission assembly of electrode 300 reaches a position where its upper part faces the stacking surface 10.

[0409] The first distance D1 is approximately equal to 3 mm, while the second distance D2, measured as the minimum distance between any part of the two rollers R2a and R2b and any part of the laminated surface 10, is approximately equal to 7 mm.

[0410] In step 4, the "movement stops" phase begins. As described above, the movement vectors of the first work path of the two rollers R2a and R2b are in a state where they coincide with the movement vector of the second work path of the laminated surface 10 in terms of direction and elastic modulus.

[0411] This movement vector is a downward, purely vertical translational motion (corresponding to a movement with a negative value only in component Z) that moves the two rollers R2a and R2b, as well as the laminated surface, together from the approach state CR to the stretched state CE. Throughout the entire "movement stop," the deviation angle β is maintained substantially equal to +90 degrees.

[0412] At the end of step 4, the configuration is reached which is approximately 6 / 7 of the stretched state CE, the "movement stop" is completed, and the steps of following at the minimum approach distance and releasing the second foil sheet 301 on the first folded layer of the separator strip NS of the laminated structure S are completed.

[0413] During step 4, the two rollers R2a and R2b, the laminated surface 10, and the second discharge assembly 300 of the foil sheet moved by the same amount according to the same movement vector.

[0414] The first distance D1 and the second distance D2 have the same values ​​as in step 3.

[0415] In step 5, the laminated surface 10 moves downward and to the left, similar to step 2, but in the opposite direction. Consistently, the two rollers R2a and R2b translate further downward, reaching the stretched state CE.

[0416] In this Step 5, the deviation angle β decreases from +90 degrees to 0 degrees, returning to a situation equivalent to Step 1, but this time with the difference that the separator strip NS is held by the first gripper 51 and the sheet 301 is stacked on the first folded layer of the separator strip NS.

[0417] Steps 6-10 are a left-hand mirror image of what happened between steps 2-5 on the right, and provide the intervention of the first release assembly 200 of the foil sheet.

[0418] Therefore, consistently, at the end of step 10 on the laminated surface 10 (equivalent to that of step 1 in terms of the spatial configuration of the apparatus 100), the separator strip NS of the two layers is folded back, and two foil sheets, preferably two electrodes 301 and 201 (cathode and anode), are positioned.

[0419] Clearly, from step 10, the method 500 can proceed to a new step 2 in which the desired laminated structure S is formed.

[0420] More generally, all the elements described above in relation to the embodiment shown in Figure 1 are provided by the present invention and can be combined with all the possible embodiments described above.

[0421] Needless to say, to satisfy specific and incidental requirements, a person skilled in the art can make further modifications and alterations, even within the scope of protection defined by the attached claims.

Claims

1. A lamination apparatus (100) for laminating separator strips (NS) and foil sheets (201, 301), A supply unit (20) is positioned immediately upstream of the stacking unit (1) and is configured to supply the separator strip (NS) along the supply path (PA), The lamination unit (1) has a lamination surface (10) configured to receive the separator strip (NS) and the foil sheet (201, 301) so as to form a laminated structure (S) of the separator strip (NS), A handling unit (130) is configured to move the laminated surface (10) relative to the supply unit (20) by continuous movement along a second work path (P2) that defines a closed curve, A stacking apparatus (100) including the above.

2. The supply unit (20) includes an outlet section (22) of the separator strip (NS) that intersects the reference plane (PR), The second work path (P2) spans the reference plane (PR), The stacking apparatus (100) according to claim 1.

3. The supply unit (20) includes a delivery direction control device (R2) located immediately upstream of the stacking unit (1), and the delivery direction control device (R2) defines the reference delivery direction (DRU) of the separator strip (NS). The reference plane (PR) is parallel to the reference delivery direction (DRU). The lamination apparatus (100) according to claim 2.

4. The lamination apparatus (100) according to claim 2 or 3, wherein the reference plane (PR) is the plane of symmetry of the second work path (P2).

5. The lamination apparatus (100) according to any one of claims 2 to 4, wherein the second work path (P2) defines a curve having two sections that intersect at an intersection point on the reference plane (PR), and preferably the second work path (P2) has a substantially bifoliate shape.

6. The lamination unit (1) includes a first block device (51) and / or a second block device (52) configured to selectively restrain the separator strip (NS) at a first restraint position (PV1) and / or a second restraint position (PV2), respectively, located near the lamination surface (10), in order to form the lamination structure (S) of the separator strip (NS). The discharge direction control device (R2) is configured to define the end section (TF) of the separator strip (NS) provided between the discharge direction control device (R2) and the first block device (51) or the second block device (52) located nearby. The handling unit (130) includes a second handling device (132), and the second handling device (132) is - A first stacking position (Pip1) defining the first end section (TF1) of the separator strip (NS), wherein the layers of the stacked structure (S) are constrained to the stacked unit (1) by the first block device (51) and / or the second block device (52), - A second stacking position (Pip2) different from the first stacking position (Pip1), defining a second end section (TF2) of the separator strip (NS) having substantially the same length as the first end section (TF1), and a second stacking position in which further layers of the stacked structure (S) are constrained to the stacking unit (1) by the first block device (51) and / or the second block device (52) relative to the first stacking position (Pip1) The configuration is such that the laminated surface (10) is moved relative to the supply unit (20) between them. A lamination apparatus (100) according to any one of claims 3 to 5.

7. The stacking apparatus (100) according to claim 6, wherein the second handling device (132) is configured to move the stacking surface (10) relative to the supply unit (20) along the second work path (P2) between the first stacking position (Pip1) and the second stacking position (Pip2) such that the length (L) of the first end section (TF1) increases by an amount substantially equal to the distance between the first block device (51) and the second block device (52).

8. The handling unit (130) includes a first handling device (131) of the delivery direction control device (R2) configured to move the delivery direction control device (R2) along a first work path (P1), When the stacking surface (10) is at the first stacking position (Pip1) or the second stacking position (Pip2), the delivery direction control device (R2) is at the same position relative to the supply unit (20). The lamination apparatus (100) according to claim 6 or 7.

9. The stacking apparatus (100) according to any one of claims 6 to 8, wherein the second work path (P2) includes at least one receiving section (TR) parallel to the reference delivery direction (DRU) for each complete movement between the first stacking position (Pip1) and the second stacking position (Pip2).

10. The supply unit (20) includes a first direction control device (R1) arranged along the supply path (PA) upstream of the delivery direction control device (R2), thereby defining an accumulation section (T) for the separator strip (NS) between the first direction control device (R1) and the delivery direction control device (R2). The first handling device (131) of the delivery direction control device (R2) is configured to move the delivery direction control device (R2) along the first work path (P1), The first handling device (131) is, - An approach state (CR) in which the delivery direction control device (R2) is at the minimum distance from the first direction control device (R1), and the minimum distance is measured according to the length of the separator strip (NS) arranged between the first direction control device (R1) and the delivery direction control device (R2), - An extended state (CE) in which the delivery direction control device (R2) is at its maximum distance from the first direction control device (R1), wherein the maximum distance is measured according to the length of the separator strip (NS) arranged between the first direction control device (R1) and the delivery direction control device (R2), The delivery direction control device (R2) is configured to move between these points. The first handling device (131) is configured to move the discharge direction control device (R2) such that the separator strip (NS) maintains the same angular orientation in all spatial arrangements it can take between the approach state (CR) and the stretched state (CE) in the storage section (T), and that the only portion of the separator strip (NS) downstream of the discharge direction control device (R2) that changes the angular orientation while the laminated structure (S) of the separator strip (NS) is being formed is the end section (TF), and the handling unit (130) is configured to move the discharge direction control device (R2) in accordance with at least one moving element to follow the laminated surface (10). The lamination apparatus (100) according to claim 8 or 9.

11. The orientation of the end section (TF) is determined according to a deviation direction (DD) that is inclined by a deviation angle (β) that changes according to the second work path (P2) with respect to the reference delivery direction (DRU), The first handling device (131) is, - By moving the transmission direction control device (R2) from the extended state (CE) to the approach state (CR), the deviation angle (β) changes in absolute value from substantially 0 degrees to substantially 90 degrees. - The delivery direction control device (R2) is configured such that, by moving it from the approaching state (CR) to the extended state (CE), the deviation angle (β) changes in absolute value from substantially 80 degrees to substantially 100 degrees, and is preferably maintained at substantially 90 degrees. The stacking apparatus (100) according to claim 10.

12. The lamination apparatus (100) includes a first discharge assembly (200) and / or a second discharge assembly (300) of foil sheets. The first discharge assembly (200) and / or the second discharge assembly (300) of the foil sheet each include a first moving device (210) and / or a second moving device (310), the first moving device (210) and / or the second moving device (310) move the first discharge assembly (200) and / or the second discharge assembly (300) of the foil sheet to the laminated surface (10) in response to approach movement (Mac), thereby discharging the foil sheet. The approach movement (Mac) is configured to move a first foil sheet (201) or a second foil sheet (301) with respect to a constrained portion of the separator strip (NS) on the layer surface (10) at a minimum release distance (DmR), wherein the approach movement (Mac) is configured to cause a condition during the receiving section (TR) in which the relative velocity between the first release assembly (200) and / or the second release assembly (300) of the foil sheet and the laminate surface (10) is substantially zero. The lamination apparatus (100) according to any one of claims 8 to 11.

13. A method (500) for forming a laminated structure (S) of separator strips (NS) for an electrochemical cell, preferably for the manufacture of a battery, The steps include: positioning a supply unit (20) located immediately upstream of the stacking unit (1) and configured to supply the separator strip (NS) along the supply path (PA); The steps include arranging the lamination unit (1) which includes a movable lamination surface (10) configured on which the separator strips (NS) are laminated, The steps include positioning a handling unit (130) configured to move the stacked surface (10) relative to the supply unit (20) by continuous movement along a second work path (P2) that defines a closed curve, The steps include restraining the first layer of the separator strip (NS) on the laminated surface (10), The steps of forming the laminated structure (S) by moving the laminated surface (10) relative to the supply unit (20) in a continuous movement according to the second work path (P2) by constraining at least one further layer of the separator strip (NS) on the laminated surface (10), Methods that include...

14. The method according to claim 13 (500), wherein the separator strip (NS) is supplied continuously, preferably at a substantially constant supply rate.

15. A lamination apparatus (100) for laminating separator strips (NS) and foil sheets (201, 301), A lamination unit (1) having a lamination surface (10) configured to receive the separator strip (NS) and the foil sheet, A supply unit (20) configured to supply the separator strip (NS) along a supply path (PA), the supply unit (20) includes a delivery direction control device (R2) located immediately upstream of the stacking unit (1), A handling unit (130) comprising: a first handling device (131) configured to move the delivery direction control device (R2) along a first work path (P1) while the stacked surface (10) is moving; and a second handling device (132) configured to move the stacked surface (10) along a second work path (P2); Includes, The first handling device (131) and the second handling device (132) are configured to move the delivery direction control device (R2) and the laminated surface (10) by guiding the separator strip (NS) so that it contacts the laminated surface or overlaps with a portion of the separator strip (NS) that is constrained parallel to the laminated surface (10), thereby moving them only by mutual movement that is substantially translational in a direction parallel to the laminated surface (10). Lamination apparatus (100).

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