Device and method for producing coils, preferably for electrochemical cells for battery production

Abstract

An apparatus (100) for manufacturing coils, preferably for electrochemical cells for battery production, comprises: a feeding unit (2) configured to feed at least a first strip-shaped article (N1) for forming a first coil (B1) and a second strip-shaped article (N2) for forming a second coil (B2); a winding unit (1) comprising a plurality of winding heads (10) comprising at least a first winding head (11) configured to wind a first strip-shaped article (N1) and a second winding head (12) configured to wind a second strip-shaped article (N2); and at least one movement device (3) of the winding head (10) configured to move the first winding head (11) and the second winding head (12). The first winding head (11) and the second winding head (12) define respective winding axes (X1, X2) substantially parallel to each other. The winding unit (1) is configured to define a separation plane (beta) which is substantially perpendicular to the winding axis (X1, X2), and the separation plane is positioned such that, at least at the first winding head (11) and the second winding head (12), one of the first strip-shaped article (N1) and the second strip-shaped article (N2) is on one side of the separation plane (P) and the other is on the opposite side of the separation plane (P).

Description

Technical Field

[0001] The present invention relates to an apparatus for manufacturing a coil, for example of the type formed by winding a strip-like product comprising a strip-like member or a plurality of superimposed strip-like members.

[0002] The invention also relates to a method for producing the coil.

[0003] The invention has a preferred, but not exclusive, application in the field of production of electrochemical cells, for the production of which the winding of strip-shaped products is used. Background Art

[0004] Specifically, in the related technical field, it is known to combine conductive strips and separator strips into layers to form the structure of anode and cathode. Then the product made by overlapping the above layers is wound in the form of a coil with the help of a specific device and used to manufacture the electrochemical battery cell itself.

[0005] The apparatus may be provided with a winding core around which the strip-like product is wound to form a coil, and in some cases, the apparatus may provide a plurality of winding cores, each of which is used for winding of a coil. Summary of the invention

[0006] In this specification and the appended claims, unless expressly stated otherwise, certain terms and expressions are deemed to have the meanings expressed in the following definitions.

[0007] The term "strip-like article" is intended to mean any solid product presented in an industrial production line in the form of an elongated strip or ribbon, i.e. an element whose longitudinal extension is significantly greater than its transverse extension. A strip-like article may be formed from a single strip or ribbon of material, or it may be formed from a plurality of overlapping strips arranged in a layer.

[0008] The strip-like article also has properties which allow a certain degree of bending of the strip-like article to occur during its travel along the associated production line.

[0009] The strip-like article may for example be made of alternatingly superimposed conductive elements and insulating layers between the conductive elements and is intended to form a sandwich to be wound to form a coil for producing an electrochemical cell.

[0010] The term "strip" is intended to denote any solid product presented in an industrial production line in the form of an elongated, strip-like element, ie an element whose longitudinal extension is significantly greater than its transverse extension. The strip may also be formed of a single layer or of a plurality of layers superimposed.

[0011] For example, the strip may be formed from a first layer of conductive or insulating material to which the coating is superimposed to form a second layer.

[0012] The term "winding" is intended to mean forming a spiral structure by rotating a strip, a ribbon or more generally a strip-like article around an axis, a flat surface or other structure. By winding, the strip-like article will form one or more turns around the axis or the structure.

[0013] The term "coil" means any helical structure formed by winding a strip, ribbon, or more generally a strip-like article around an axis, flat surface, or other winding structure. Depending on the structure around which the strip-like article is wound, the overall shape of the coil may be generally cylindrical, rather than compressed or otherwise.

[0014] As mentioned above, coils can be used not only in the field of electrochemical cells, but also in other fields, such as, for example, in the field of capacitors, in which coil-shaped structures can also be used.

[0015] The term "closed path" is intended to mean a path along which a winding head or other element travels, wherein the start and end points of the path substantially coincide.

[0016] The term "continuous" refers to an expression of motion, meaning an operation that is performed without interruption, without stops or interruptions in the operation. In particular, for the motion of a strip or other element, the term "continuous" means that the strip never stops during its motion.

[0017] Reference to a measured value or quantity, such as for example the displacement speed of an object, as being "substantially constant" means that such measured value or quantity maintains a value over time that preferably varies by a maximum of ±10%, preferably by a maximum of ±5%, preferably by a maximum of ±2%.

[0018] The term "integral" with reference to the movement of two or more elements means that these elements perform substantially the same movement and are substantially simultaneous. In other words, two integral elements move together as a single body, although the two elements are not necessarily joined or constrained to each other. In fact, it can be provided that the corresponding motion systems of the two elements are coordinated to move the two elements together when necessary. In addition, temporary constraints can be used between the two elements, for example, in certain steps, the two elements are joined to each other so that the two elements move together, and then the two elements are separated again so that the two elements move independently of each other.

[0019] It should also be made clear that the expression "displacing an object between a first position and a second position" is intended to mean a displacement from a first position to a second position as well as a displacement from a second position to a first position.

[0020] The definition applies in the same manner to similar expressions of motion, such as, for example, transferring or moving a generic object between two locations, between two areas, or even between two different operating configurations.

[0021] The term "alternating motion" is intended to mean a motion between two positions, based on which a body or a component is displaced between a first position and a second position and then returns to the first position again. This motion can be repeated once or an unlimited number of times. Furthermore, the trajectory between two points can be the same in the outward path between the first position and the second position and in the return path between the second position and the first position. The trajectory performed by the body between the two positions can also be different between one repeated motion and another repeated motion.

[0022] In the context of the present invention, the terms "substantially parallel" and "substantially perpendicular" are used to describe two movement directions or two development directions of two different bodies, referring to the parallel or orthogonal state between the two directions, which may deviate from the completely parallel or completely orthogonal directions by ±10°, preferably by ±5°.

[0023] In the context of the present invention, when referring to the term "roughly horizontal", whether relative to the direction of movement, development or arrangement of the body, "roughly horizontal" refers to the direction perpendicular to the direction of gravity, which may deviate from completely orthogonal by ±10°, preferably by ±5°.

[0024] In the context of the present invention, the term "interconnection" with reference to two or more different parts or bodies means that there is a mechanical, electrical or electromechanical connection between the two parts or bodies, which connection allows the movement to establish a dependency between the movement of one part and the movement of another part. This dependency can make the two parts or bodies move in an integrated manner, that is, move with the same laws of motion, or move simultaneously, that is, move at the same time, but not necessarily with the same laws of motion, and also make one part or body perform a movement subsequent to the movement of another body or part according to a predetermined order.

[0025] The interconnection may be made through a physical connection, such as through a mechanical connection or wiring, or may be made without a physical connection, such as through a non-contact sensor detecting the movement of a component or body, thereby sending a signal to cause another component or body to perform a corresponding movement.

[0026] The term "substantially simultaneously" mentioned with reference to expressions of motion means hereinafter that two components or bodies move together at the same time.

[0027] The simultaneity may affect the entire path of movement or a portion of the path, so that during the displacement of two parts or bodies, it is sufficient that there is an instant in which the movements of the two parts overlap.

[0028] In the context of the continuous need to improve the performance and efficiency of production processes, the Applicant has initially observed how, in a production line for manufacturing coils, the winding speed of the strip-like product used to form the coils constitutes an important factor limiting the production capacity of the line itself.

[0029] Furthermore, this limitation is even more critical if high precision is required in the formation of the coil. In particular, the Applicant has observed that in many applications, such as for example in the field of electrochemical cell production, it is necessary to ensure high precision in the geometry of the winding in order to ensure the desired properties of the finished product.

[0030] However, applicants have discovered that there are inherent limitations to travel speeds, as well as winding speeds, related both to the materials used to form the coils and to the technology available for the relevant applications.

[0031] Therefore, in order to increase the speed of manufacturing coils with the aid of a strip-shaped product, the Applicant has considered that this can be achieved by using more than one winding head, each winding head being used to form a respective coil.

[0032] The Applicant has therefore further realised how to increase the production capacity of a production line for manufacturing coils by providing two different feeds of strip-like product and each winding head being used to form a respective coil.

[0033] Finally, the Applicant has discovered that by maintaining the strip-shaped article properly separated at least during winding to form the coil, the production capacity of the production line can be increased without having to give up the required accuracy in terms of geometry and dimensions.

[0034] Thanks to these characteristics, it is possible to optimally exploit the production capacities of the production line which can provide for the movement of one or more additional winding heads and the feeding of a single base strip, without having to use two different strip products, which would give rise to particular complications in managing the movement of the individual strips, the base strip being subsequently divided into two parts, each intended to form a corresponding strip product and an associated coil, without introducing particular complications into the structure of the equipment.

[0035] Thus, in a first aspect of the invention, the invention relates to an apparatus for manufacturing a coil, preferably a coil for an electrochemical cell for battery production.

[0036] Preferably, the apparatus comprises a feeding unit configured to feed at least a first strip of product, preferably for forming the first coil, and a second strip of product, preferably for forming the second coil.

[0037] Preferably, the apparatus comprises a winding unit comprising a plurality of winding heads, the plurality of winding heads comprising at least a first winding head configured to wind a first strip-like product and a second winding head configured to wind a second strip-like product.

[0038] Preferably, the first winding head and the second winding head define respective winding axes that are substantially parallel to each other.

[0039] Preferably, said device comprises at least one movement device of said winding heads, said movement device being configured to move said first winding head and said second winding head.

[0040] Preferably, the winding unit is configured to define a separation plane between the first winding head and the second winding head.

[0041] Preferably, the separation plane is substantially perpendicular to the winding axis.

[0042] Preferably, the separation plane is positioned such that: at least at the first winding head and the second winding head, one of the first strip-like product and the second strip-like product is located on one side of the separation plane and the other is located on the opposite side of the separation plane.

[0043] Due to these features, the apparatus for making coils of the present invention can wind two different coils substantially simultaneously. Therefore, this allows a higher productivity to be achieved with the same winding speed of the strip-shaped product and / or with the same feeding speed of the strip-shaped product to the winding head.

[0044] At the same time, during the winding of the strip-like product, the strip-like product may be kept separated relative to the separation plane to form two different coils.

[0045] In this way, the flow of the first and second strips of product and the flow of the strip-like elements (one or more) forming the strips of the first and second strips of product may be kept separate.

[0046] The setting of the separation plane allows the flows to be kept adjacent at the same time, thus allowing the use of a configuration that lends itself to performing winding operations with the head in a stationary position, i.e., with the head only performing a rotational movement around the relevant winding axis, and with the head in motion, for example, with the head performing a linear translational movement.

[0047] Furthermore, this configuration also makes it possible to easily perform cutting operations on the strip-like member(s) or strip-like products, for example thereby allowing a single stream to be split into two different streams, or to work simultaneously on adjacent edges of two strip-like members or strip-like products separated by a separation plane.

[0048] In a second aspect of the invention, the invention relates to a method for manufacturing a coil, preferably for an electrochemical cell for battery production.

[0049] Preferably, the method comprises providing a first strip of article and a second strip of article.

[0050] Preferably, the method comprises winding the first strip of product to form a first coil, and winding the second strip of product to form a second coil.

[0051] Preferably, the first and second strip-like articles are wound about respective winding axes which are substantially parallel to each other.

[0052] Preferably, said first strip-like product and said second strip-like product are separated via said separation plane at least during said winding.

[0053] Preferably, the separation plane is substantially perpendicular to the winding axis.

[0054] The method according to this aspect also allows the production capacity of a coil production line to be increased, thereby allowing two different coils to be wound out simultaneously.

[0055] This therefore allows to increase the productivity at the same winding speed of the strip-like product and / or the same feeding speed of the strip-like product to the winding head.

[0056] Furthermore, similar to the previous aspect, the first strip-shaped product and the second strip-shaped product can travel along two different paths separated at least in part by a separation plane. This makes it possible to envision an optimal travel trajectory to increase the speed of the strip-shaped product and / or reduce the tension state that may occur in the strip-shaped product during the operations required to form the coil.

[0057] In a third aspect of the invention, the invention relates to an apparatus for manufacturing a coil, preferably for an electrochemical cell for battery production.

[0058] Preferably, the apparatus comprises a feeding unit configured to feed at least a first strip of product preferably for forming the first coil and a second strip of product preferably for forming the second coil.

[0059] Preferably, the apparatus comprises a winding unit comprising a plurality of winding heads, the plurality of winding heads comprising at least a first winding head and a second winding head, the first winding head being configured to wind a first strip-like product, the second winding head being configured to wind a second strip-like product.

[0060] Preferably, the apparatus comprises interconnecting means for interconnecting the first winding head with the second winding head.

[0061] Preferably, the interconnection means are configured such that the first and second winding heads substantially at least partially simultaneously perform one or more of: a rotation about a respective winding axis, a translation, a rotation about a further rotation axis different from the winding axis.

[0062] Alternatively, the interconnection means are preferably configured such that the second winding head is caused to perform one or more of the following: rotate about a respective winding axis, translate, rotate about a further rotation axis different from the winding axis, after the first winding head according to a predetermined sequence.

[0063] Due to the characteristics of the invention, based on this aspect it is possible to envisage the presence of two different winding heads which operate in a simultaneous or in any case coordinated manner with subsequent movements in order to produce two different coils.

[0064] In this way, a higher production rate can be achieved with the same winding speed of the strip-like product and / or the same feed speed of the strip-like product to the winding head.

[0065] It should also be understood that the winding head can move according to a specific trajectory during the winding of the strip-like product, or the winding head can even move according to a specific trajectory before or after the winding is performed, for example, when feeding the strip-like product; or, when unloading the manufactured coil; or, when performing other operations on the coil itself, the winding head can move according to a specific trajectory.

[0066] In a fourth aspect of the invention, the invention relates to a method for producing a coil, preferably for an electrochemical cell for battery production.

[0067] Preferably, the method comprises providing a first strip of article and a second strip of article.

[0068] Preferably, the method comprises winding the first strip of product to form a first coil, and winding the second strip of product to form a second coil.

[0069] Preferably, the method comprises interconnecting the first winding head with the second winding head such that the first winding head and the second winding head move simultaneously or such that the second winding head moves after the first winding head according to a predetermined sequence.

[0070] It should be understood that based on this aspect, results and benefits corresponding to those described in the previous aspect can be achieved.

[0071] In a fifth aspect of the invention, the invention relates to an apparatus for manufacturing a coil, preferably for an electrochemical cell for battery production.

[0072] Preferably, the apparatus comprises a feeding unit configured to feed at least a first strip of product, preferably for forming the first coil, and a second strip of product, preferably for forming the second coil.

[0073] Preferably, the apparatus comprises a winding unit comprising a plurality of winding heads, the plurality of winding heads comprising at least a first winding head and a second winding head, the first winding head being configured to wind a first strip-like product, the second winding head being configured to wind a second strip-like product.

[0074] Preferably, the apparatus comprises: at least one conveying device configured to convey a base strip-like member; and at least one separating device configured to separate the base strip-like member to form a first strip-like member and a second strip-like member, wherein the first strip-like member and the second strip-like member are used to form the first strip-like product and the second strip-like product, respectively.

[0075] Thanks to these features, it is possible to feed and manufacture two different coils using a single strip, ie using the base strip.

[0076] For example, the base strip may be collected in a particular coil that gradually unwinds and separates to form two distinct strips.

[0077] In this way, feeding a single strip is sufficient to be able to manufacture two different coils - possibly substantially simultaneously.

[0078] Thus, always with the same winding speed of the strip-like product and / or the same feed speed of the strip-like product to the winding head, this aspect of the invention also contributes to increasing the productivity of the device as a whole.

[0079] In a sixth aspect of the invention, the invention relates to a method of manufacturing a coil, preferably for use in an electrochemical cell for battery production.

[0080] Preferably, the method comprises providing a first strip of article and a second strip of article.

[0081] Preferably, the method comprises winding the first strip of product to form a first coil and winding the second strip of product to form a second coil.

[0082] Preferably, the method comprises conveying a base strip and separating the base strip to form a first strip and a second strip, the first strip and the second strip being used to form the first strip-like product and the second strip-like product, respectively.

[0083] It will be appreciated that based on this aspect, results and benefits corresponding to those described in the previous aspect may be achieved.

[0084] In a seventh aspect of the invention, the invention relates to an apparatus for manufacturing a coil, preferably for an electrochemical cell for battery production.

[0085] Preferably, the apparatus comprises a feeding unit configured to feed at least a first strip of product, preferably for forming the first coil, and a second strip of product, preferably for forming the second coil.

[0086] Preferably, the apparatus comprises a winding unit comprising at least one winding head configured to wind the first strip of product and the second strip of product.

[0087] Preferably, the apparatus comprises: at least one conveying device configured to convey a base strip-like member; and at least one separating device configured to separate the base strip-like member to form a first strip-like member and a second strip-like member, wherein the first strip-like member and the second strip-like member are used to form the first strip-like product and the second strip-like product, respectively.

[0088] Thanks to these features, it is possible to use a single strip, ie the base strip, to feed two different strips for making the coils.

[0089] For example, the base strip may be collected in a particular coil that gradually unwinds and separates to form two distinct strips.

[0090] In this way, feeding a single strip is sufficient to enable the production of, for example, two separators for producing an electrochemical cell.

[0091] Furthermore, due to the features of the invention based on this aspect, the manufacture of double-start coils, in which two pairs of conductive strips and two pairs of associated separators are provided wound into coils in an alternating configuration, can be simplified.

[0092] Furthermore, this aspect of the invention can also make it possible, by separating the base strip, to adapt a machine for making a one-start coil to make a coil having two or more principles.

[0093] In an eighth aspect of the invention, the invention relates to a method for manufacturing a coil, preferably for an electrochemical cell for battery production.

[0094] Preferably, the method comprises providing a first strip of article and a second strip of article.

[0095] Preferably, the method comprises winding the first strip of product and the second strip of product to form a coil.

[0096] Preferably, the method comprises conveying a base strip and separating the base strip to form a first strip and a second strip, the first strip and the second strip being used to form the first strip-like product and the second strip-like product respectively.

[0097] It should be understood that based on this aspect, results and benefits corresponding to those described in relation to the previous aspect can be achieved.

[0098] In at least one of the above aspects, the present invention may have at least one of the further preferred features indicated below.

[0099] Preferably, the first strip-like product is wound via a first winding head, and the second strip-like product is wound via a second winding head.

[0100] Thanks to this feature, two coils can be made at two different locations substantially simultaneously or independently of each other.It will be understood that the two winding heads can have common parts, for example when aligned on the same axis, as well as parts formed by different areas of the same body or element.

[0101] Preferably, the winding axis of the first winding head and the winding axis of the second winding head are substantially coaxial.Preferably, the first winding head and the second winding head are arranged side by side with each other along an axis coinciding with the winding axis.

[0102] In this way, it is convenient to use two parallel flows of strip-like product, and possibly two parallel flows of strip-like elements, which can be moved in a mirror-image manner relative to the separation plane to produce the two coils.

[0103] Thus, by operating in parallel, two coils, possibly with identical characteristics, can be manufactured substantially simultaneously, thereby increasing the productivity of the apparatus.

[0104] It will also be appreciated that when the winding axis of the first winding head and the winding axis of the second winding head are substantially coaxial, a single winding axis is still defined, which is ideally subdivided into two parts, the respective axes of the two winding heads being coincident.

[0105] Preferably, each of the winding heads is configured to rotate about a respective axis of the winding shaft.

[0106] Preferably, the winding unit is configured to rotate each of the winding heads about a corresponding one of the winding axes.

[0107] Thanks to these characteristics, the winding of the strip is carried out by rotation of the winding head itself, which provides a structurally simple solution, allowing high winding speeds to be obtained.

[0108] Preferably, during the winding of the first and second strip-like products, the winding head is translated and / or rotated about another axis of rotation than the winding axis.

[0109] Preferably, the movement device is configured to move the first winding head and / or the second winding head in at least one translation and / or rotation about an axis different from the winding axis.

[0110] The Applicant has observed that by providing the winding head with a further movement besides the rotation for winding out the coils, the operations for making the coils can be optimized, whether during feeding, during winding, during unloading the coils after their manufacture, or during other operations performed on the coils.

[0111] Preferably, at least one of said translations and / or rotations is performed while winding said first strip-like product and / or said second strip-like product.

[0112] Providing movement during winding is particularly advantageous since such movement may allow the flow of the strip-like product and / or the strip-like members (one or more) forming the strip-like product to be controlled, thereby limiting the creation of unnecessary tension states or, more generally, improving the productivity of the apparatus.

[0113] Preferably, provision is made for interconnecting the first winding head with the second winding head so that the first winding head and the second winding head are moved substantially simultaneously or so that the second winding head is moved after the first winding head according to a predetermined sequence.

[0114] Preferably, the apparatus comprises interconnecting means for interconnecting the first winding head with the second winding head.

[0115] Thanks to these characteristics, it is possible to provide an interconnection between the two winding heads, whether mechanical, electromechanical or purely electronic, such that the movement of one winding head is dependent on, or in any case coordinated with, the movement of the other winding head.

[0116] For example, the interconnection may enable two winding heads to move simultaneously, thereby executing similar or dissimilar motion profiles, or the interconnection may enable the movement of one winding head to follow the movement of the other winding head according to a predetermined sequence and profile.

[0117] By way of example again, in the second case it can be provided that the first winding head performs a movement, stops, and then the second winding head performs a corresponding movement.

[0118] Preferably, moving the first winding head and the second winding head substantially simultaneously, or moving the second winding head after the first winding head according to a predetermined sequence, comprises one or more of the following: rotating the winding heads around respective winding axes, translating the winding heads, rotating the winding heads around another rotation axis different from the winding axis.

[0119] Preferably, the interconnection means is configured such that the first winding head and the second winding head substantially simultaneously perform one or more of: rotate about a respective winding axis, translate, rotate about a further rotation axis different from the winding axis.

[0120] Preferably, the interconnection means are configured such that the second winding head is caused to perform one or more of the following: rotate about a respective winding axis, translate, rotate about a further rotation axis different from the winding axis according to a predetermined sequence after the first winding head.

[0121] It will be appreciated that by interconnecting the two winding heads during the above movement, two different coils can be produced by two parallel and separate streams of strip-like product and / or strip-like elements, without the intended movement becoming an obstacle to the progress of the strip-like element and the associated strip-like product.

[0122] Preferably, the further rotational axis different from the winding axis is an axis substantially parallel to the winding axis.

[0123] This solution allows the winding head to be easily displaced from the area where the strip-like product is fed and wound to another area, for example for unloading the coils thus made. At the same time, more than two winding heads can be provided so that: when two winding heads perform the winding of two corresponding coils, the other winding heads are in different areas, for example in the unloading area, and vice versa.

[0124] Preferably, the apparatus comprises four winding heads.

[0125] Preferably, the apparatus comprises six winding heads.

[0126] Thus, two or three pairs of winding heads can be provided accordingly, wherein one pair of winding heads performs the winding of the strip and another pair of winding heads is located, for example, in the unloading area. If there are six winding heads, the third pair of winding heads is located in the middle area in order to reduce the rotation angle that the heads must pass from the winding area to the next area, for example, the unloading area, without excessively affecting the overall size of the device.

[0127] Preferably, the winding unit is configured such that the first winding head and the second winding head wind the first strip-like product and the second strip-like product, respectively, substantially at least partially simultaneously.

[0128] Thanks to this feature, the two coils can be made substantially simultaneously, allowing an increase in productivity with identical feed and winding speeds, as well as taking full advantage of any movement envisaged for the winding heads, which the two winding heads can carry out simultaneously.

[0129] Preferably, the interconnection means comprises a mechanical connection.

[0130] In this way, a higher synchronicity between the two winding heads can be ensured more easily.

[0131] Preferably, the mechanical connection comprises a support body configured to rotatably support the winding head.

[0132] Preferably, the support body is rotatable about an axis of rotation substantially parallel to the winding axis.

[0133] Due to this feature, the two winding heads can be rotated about another rotation axis, for example substantially parallel to the winding axis, and thus shifted from the area where the strip-like product is wound to another area where the coil can, for example, undergo subsequent operations or be unloaded, and vice versa.

[0134] Preferably, the mechanical connection comprises a frame structure supporting the winding head.

[0135] In this way, the connection can be made directly between the structures made on the two winding heads, so that the two winding heads become one piece. Therefore, the mechanical connection is particularly simple and strong.

[0136] Preferably, the supporting body is rotatably connected to the frame structure, the winding head being supported on the frame structure by means of the supporting body.

[0137] Preferably, the frame structure is movable.

[0138] In this way, the movements of the frame structure and the support body can be appropriately combined, thereby allowing the winding head to perform various movements during winding and before or after winding, for example, providing a linear movement during winding and a rotation after the strip-like product has been wound to perform, for example, unloading of the coil. In addition, this feature can also allow the execution of complex movements, such as movements formed by rotation-translation movements.

[0139] Preferably, causing the first and second winding heads to move substantially simultaneously, or causing the second winding head to move after the first winding head according to a predetermined sequence, comprises causing the first and second winding heads to move in an alternating motion.

[0140] Preferably, the frame structure is configured to move according to an alternating motion.

[0141] Thanks to this feature, for example, it is possible to move the winding head closer to and further away from the feeding area, the unloading area, or other areas where further operations are still performed on the coils. This allows to properly control the travel of the strip-shaped product and speed up the operations of making the coils, since this allows to limit the occurrence of undesirable tensioning conditions.

[0142] Preferably, the alternating movement comprises a translation along a translation axis.

[0143] Providing translational motion along a linear axis may allow for simplified motion in the structure.

[0144] Preferably, the translation axis is substantially horizontal.

[0145] Horizontal movement may be useful to optimize overall size and improve accessibility to upper areas of the device.

[0146] Preferably, there is provided: conveying a base strip and separating the base strip to form a first strip and a second strip for forming the first strip-like product and the second strip-like product respectively.

[0147] Preferably, the apparatus further comprises: at least one conveying device configured to convey the base strip-like member; and at least one separating device configured to separate the base strip-like member to form a first strip-like member and a second strip-like member, respectively, for forming the first strip-like product and the second strip-like product.

[0148] Due to these features, a single strip, ie a base strip, can be used to feed and manufacture two different coils. For example, a base strip can be collected in a specific coil that is gradually unwound and separated to form two different strips.

[0149] Preferably, the first strip-like member and the second strip-like member are separated via the separation plane.

[0150] Preferably, in embodiments in which the first and second strips are wound on a single winding head, for example in the case of a solution with two or more starting points, the winding unit is configured to define a separation plane substantially perpendicular to the winding axis of the winding head.

[0151] In this way, after the base strip has been separated into two parts, the two flows can be conveniently separated during the conveying of the strip.

[0152] This separation can be maintained throughout the path until the winding head is reached, or alternatively, the strip can change its position relative to the separation plane in one or more areas, for example by overlapping each other, in order to perform specific operations in these areas.

[0153] Preferably, the second strip-like member is moved away from the first strip-like member in a direction substantially perpendicular to the travel direction of the strip-like member, so that the first strip-like member and the second strip-like member are separated via the separation plane.

[0154] Preferably, the device includes a steering roller, which is configured to move the second strip-like member away from the first strip-like member in a direction substantially perpendicular to the direction of travel of the strip-like member. Preferably, the steering roller is configured to move the second strip-like member away from the first strip-like member in a direction substantially perpendicular to the direction of travel of the strip-like member and substantially parallel to the winding axis.

[0155] This feature is particularly advantageous in situations where the strip is separated by cutting the base strip, so as to move two sides of the strip apart that would otherwise remain close together after the cut.

[0156] Preferably, the second strip-like member is moved closer to the first strip-like member in a direction substantially perpendicular to the travel direction of the strip-like member, so that the first strip-like member and the second strip-like member are substantially overlapped in a direction substantially parallel to the separation plane. Preferably, the second strip-like member is moved closer to the first strip-like member after the second strip-like member is moved away from the first strip-like member.

[0157] Preferably, the device includes a steering roller, which is configured to move the second strip-like member closer to the first strip-like member in a direction substantially perpendicular to the travel direction of the strip-like member. Preferably, the steering roller is configured to move the second strip-like member closer to the first strip-like member in a direction substantially perpendicular to the travel direction of the strip-like member and substantially parallel to the winding axis.

[0158] Thanks to these features, the strip can be wound on a single winding head, allowing the manufacture of coils with two or more starting points; or providing a single coil using the base strip for the manufacture of two separators of an electrochemical cell.

[0159] It is also possible to use a single delivery of the base strips to wind each strip on a respective winding head, thereby simplifying the feed unit.

[0160] Preferably, the turning roller is substantially cylindrical. Preferably, the turning roller has an axis of rotation inclined at an angle α relative to a direction substantially perpendicular to the separation plane, preferably, the angle α is comprised between 30° and 5°, preferably, the angle α is comprised between 25° and 10°, preferably, the angle α is comprised between 20° and 15°.

[0161] Preferably, the angle α is less than or equal to 30°, preferably, the angle α is less than or equal to 20°, preferably, the angle α is less than or equal to 15°, preferably, the angle α is less than or equal to 10°, preferably, the angle α is less than or equal to 5°.

[0162] Due to these properties, the strip-like element can be diverted with a particularly simple and reliable solution.

[0163] Preferably, the second strip-like member is moved away from the first strip-like member in a direction substantially parallel to the separation plane.

[0164] Preferably, the apparatus comprises a deflection roller configured to move the second strip away from the first strip in a direction generally parallel to the separation plane.

[0165] This feature is particularly useful for restoring the strip-like elements to parallelism after they have been moved away from the separation plane.

[0166] In fact, the moving away of the strip can be achieved by means of deflecting rollers with an inclined axis.

[0167] Preferably, the second strip-like member is moved closer to the first strip-like member in a direction substantially parallel to the separation plane.

[0168] Preferably, the apparatus comprises a deflection roller configured to move the second strip closer to the first strip in a direction generally parallel to the separation plane.

[0169] In this way, the strips can be restored to be parallel and side-by-side after being separated at the separation plane.

[0170] Alternatively, the strips may be moved closer together to keep the strips one above the other, for example to be wound on a single winding head in a solution with two or more starting points.

[0171] It should be noted that some steps of the above method may be independent of the reported execution order. In addition, some steps may be optional. In addition, some steps of the method may be repeated, or some steps of the method may be performed in series or in parallel with other steps of the method. BRIEF DESCRIPTION OF THE DRAWINGS

[0172] The characteristics and advantages of the present invention will become more apparent from the detailed description of a preferred embodiment of the invention illustrated by way of non-limiting example, with reference to the accompanying drawings, in which:

[0173] Figure 1 is a detailed side view of the apparatus according to the present invention;

[0174] Figure 2 yes Figure 1 A stereogram of the device;

[0175] Figure 3 yes Figure 1 The floor plan of the equipment;

[0176] Figure 4 is another perspective view of the apparatus of the present invention;

[0177] Figure 5 and Figure 6 are respectively a plan view and a stereoscopic view of a conveying device and a separating device of the apparatus of the present invention;

[0178] Fig. 7A and Figure 7B a plan view and a perspective view, respectively, of a conveying device and a separating device of the apparatus of the invention according to an alternative embodiment;

[0179] Fig. 8A and Figure 8B A plan view and a perspective view, respectively, of a conveying device and a separating device of an apparatus according to the invention according to a further embodiment. DETAILED DESCRIPTION

[0180] First reference Figure 4 , 100 as a whole represents an apparatus for manufacturing coils B1, B2 manufactured according to the present invention.

[0181] The device 100 is advantageously configured to manufacture two different coils, indicated by reference numerals B1 and B2. As will be explained in more detail below, in a preferred embodiment, these coils are manufactured simultaneously, although it is also conceivable that the two coils are manufactured substantially simultaneously at different times or only partially.

[0182] In a preferred embodiment, the coils B1 and B2 are manufactured by winding respective strip-shaped products N1 , N2 , and the coils B1 and B2 are preferably used for producing electrochemical cells.

[0183] However, it will be appreciated that this represents one possible embodiment example and that the apparatus 100 according to the invention may be used for winding strip-shaped articles for different uses, even in fields other than those related to the production of electrochemical cells.

[0184] For example, also in the field of energy storage, the invention may be applied to the manufacture of other rolled components for batteries or supercapacitors.

[0185] In some embodiments, such as the embodiments shown in the figures, in particular Figure 4In the embodiment shown in , the apparatus 100 can be used in a production line for producing coils for electrochemical cells, wherein each strip-shaped product N1 , N2 is produced by combining a plurality of strip-shaped members, which are preferably overlapped to form a layer.

[0186] For example, in the embodiment shown in the figures, the set of such strip-like members advantageously comprises at least two conductor strip-like members and two separator layers, which are alternately arranged to form a strip-like product.

[0187] As such, the separator strip may allow two conductor strips to remain electrically separated from one another when helically wound to form a coil for an electrochemical cell.

[0188] It will be appreciated that in the figures, for the first strip of product the strips are indicated by reference numerals N11, N12, N13, N14 and for the second strip of product the strips are indicated by reference numerals N21, N22, N23, N24.

[0189] from Figure 2 and Figure 3 As can be clearly seen in the example shown, in some embodiments, each strip-shaped product is wound by a corresponding winding head. In other words, the first strip-shaped product N1 is preferably wound by the first winding head 11, and the second strip-shaped product N2 is preferably wound by the second winding head 12.

[0190] It will be understood that the coil B1 is made by winding the first strip-like product N1 around the winding axis X1 via the first winding head 11, and the coil B2 is made by winding the second strip-like product around the associated winding axis X2 via the first winding head 11. Preferably, the winding of the strip-like products N1, N2 is achieved by rotating the respective winding heads 11, 12 around the associated winding axis. However, more complex movements, such as compound movements, may also be provided to perform the winding, which also depends on the type of coil to be manufactured.

[0191] like Figure 2 As shown, in some embodiments, the winding axis X1 and the winding axis X2 are coaxial and substantially coincident with each other. Thus, in embodiments providing for rotation of the winding heads 11, 12, the winding heads 11, 12 are in fact rotatable about the same axis of rotation.

[0192] More generally, the winding axes of the winding heads may be substantially parallel to each other. Obviously, in this case, the winding heads 11 and 12 will be able to rotate around different axes, even when the different axes are parallel.

[0193] The winding heads 11 and 12 may also be configured to grip the strip-like product to perform winding of the strip-like product.

[0194] To this end, each winding head 11, 12 may support an associated gripping device (not shown) which is configured to grip a portion of the respective strip-shaped product N1, N2.

[0195] Thus, winding of the strip-like product can be achieved by rotating the gripping device. By gripping the ends of the strip-like product N1, N2, or more generally, by gripping a portion of the strip-like product N1, N2, and by rotating the end or portion, the strip-like product can actually be wound so as to obtain a spiral configuration forming a coil.

[0196] Thus, the winding unit 1 can be configured to rotate each of the winding heads around a respective winding axis X1, X2, for example, the winding unit 1 can be configured to rotate each of the winding heads around a respective winding axis X1, X2 by means of a respective motor or by means of a single motor that moves both heads. More generally, the winding unit 1 can be configured so that the winding heads 11, 12 move according to a rotational movement and / or a translational movement, thereby obtaining a coil by winding a strip-shaped product.

[0197] In an alternative embodiment not shown in the figures, the winding unit 1 may comprise an arm supporting the winding head so that it moves along a working path, which may be, for example, a closed path in which the winding unit 1 circulates.

[0198] A separation plane β is advantageously defined between the two winding heads 11 , 12 , which separation plane β is oriented substantially perpendicularly to the winding axes X1 , X2 .

[0199] For example, in an exemplary embodiment, such a plane may be defined to be located in an interface region between the first winding head 11 and the second winding head 12 .

[0200] In practice, the winding axis X1 and the winding axis X2 may be formed by respective shafts. The opposite ends of each shaft may be supported on the support body 41 and the auxiliary support member 13, respectively, in a rotatable manner, for example. Figure 2 The auxiliary support member 13 may define an intermediate area between the first winding head and the second winding head, where a separation interface is provided between the two winding heads, and the intermediate area defines a passing position of the separation plane β.

[0201] However, it will be appreciated that an embodiment may be provided in which no auxiliary support 13 is provided and, for example, the two winding heads 11, 12 are formed by a single body. In this case, the winding axes will coincide and the two winding heads will be aligned along a direction defined by the winding axis and will extend between two opposing support bodies 41. The separation plane β may advantageously be arranged to pass along the winding axis in an intermediate region between the two opposing support bodies 41, the intermediate region preferably corresponding to the center line. It should also be noted that, in an alternative embodiment, a single support body 41 may be provided from which the winding heads extend, the winding heads being, for example, cantilevered. In this case, the separation plane β may pass through a midpoint between the end at which one winding head is supported on the support body and the opposite end at which the other winding head is located, the opposite end specifically corresponding to the free end, the midpoint preferably corresponding to the center line.

[0202] It should also be understood that in this case, the two winding heads 11 and 12 may be defined along a single body forming the two winding heads at regions where the first strip-like product and the second strip-like product are respectively wound.

[0203] Now refer to it again Figure 3 , the separation plane β is usually positioned so that one of the first strip of product N1 and the second strip of product N2 is located on one side of the separation plane β itself and the other is located on the opposite side of the separation plane β.

[0204] As will be described in more detail below, in a preferred embodiment, the first strip-like product N1 and the second strip-like product N2, and preferably the strip-like members forming the first strip-like product N1 and the second strip-like product N2, always maintain one on one side of the separation plane β and the other on the opposite side of the separation plane β.

[0205] However, it is conceivable that in at least one region this does not occur, so that the strips cross one another or at least partially overlap.

[0206] However, it should be noted that, typically, the first and second strip products N1 and N2 are held at least at the first and second winding heads 11 and 12 so that one is located on one side of the separation plane β and the other is located on the opposite side of the separation plane β.

[0207] As can be seen from the figure, in some embodiments, a plurality of winding heads 10 may be provided, for example, a plurality of winding heads 10 formed by a plurality of pairs of first winding heads and second winding heads.

[0208] For example, from Figure 1It can be seen that six winding heads 10 can be provided, namely three pairs of first winding heads and second winding heads, wherein the first pair of winding heads wind the strip-like product, the second pair of winding heads is, for example, in an unloading position, in which the coil is unloaded when it is made, and the third pair is in an intermediate position.

[0209] As mentioned above, each strip-shaped product N1, N2 can be made by combining a plurality of strip-shaped members.

[0210] In some embodiments, the strip-shaped member is fed by a specific conveying device 6. For example, Figure 6 An example of an embodiment of a conveying device 6 is shown, which can be formed by a large-sized coil-like element, in which the strip-like element is collected in order to be unwound during operation of the device and thus fed.

[0211] Each of the strips N11, N12, N13, N14, N21, N22, N23, N24 may be conveyed by a corresponding conveying device, or a plurality of strips may be conveyed by a common conveying device.

[0212] In a preferred embodiment, for example Figure 5 and Figure 6 In the embodiment shown in FIG, a base strip M is conveyed and separated to form a first strip N11 and a second strip N21 for forming the first strip product N1 and the second strip product N2, respectively.

[0213] It will be appreciated that although a single conveying device 6 is shown conveying the base strip M, it is envisaged that there are the same number of conveying devices as there are strips forming the individual strip-like articles.

[0214] from Figure 5 It can be seen that when the base strip M is conveyed by the conveying device 6, the base strip M can be guided toward at least one separation device 7, which is configured to separate the base strip M into the above-mentioned two strips.

[0215] Preferably, the base strips are separated such that the first strip N11 and the second strip N21 are separated via a separation plane β.

[0216] Thus, the separation plane β may be defined according to the point at which the separation means 7 act to separate the base strip M into two parts.

[0217] Now refer to it again Figure 4The strip-shaped members supplied by the conveying device 6 are supplied to a feed unit 2 which is only schematically shown in the figure.

[0218] It will be understood that before the strip is fed to the feed unit 2, the strip may pass through further units, such as units for preliminary processing of the strip. For example, a preliminary cutting or ablation operation may be performed on the conductor strip to shape the relevant outer edges, thereby facilitating the connection with further conductor parts within the electrochemical cell. In some embodiments, one or more of these preliminary operations may be performed by the separation device 7 itself, where a separation device is provided. In other words, the separation device 7 may be used not only to separate the base strip M, but also for further work, such as work performed in the separation zone of the base strip, i.e., the two facing sides of the strip after it has been separated.

[0219] Reference again Figure 5 Preferably, the second strip-shaped member N21 is moved away from the first strip-shaped member N11 in a direction substantially perpendicular to the travel direction a of the strip-shaped members N11 and N21.

[0220] Although the strips are positioned at a large distance from one another, the strips can still be kept separated by the separation plane β.

[0221] The movement of the two strip-like members away from each other can be carried out in a direction perpendicular to the separation plane β, in a direction parallel to the separation plane β, or in a combination of these two directions.

[0222] To this end, the device 100 may include a steering roller 71, which is configured to move the second strip-like member N21 away from the first strip-like member N11 in a direction approximately perpendicular to the travel direction of the strip-like members N11, N21. Preferably, the steering roller 71 is configured to move the second strip-like member N21 away from the first strip-like member N11 in a direction approximately perpendicular to the travel direction of the strip-like members N11, N21 and approximately parallel to the winding axes X1, X2.

[0223] In some embodiments, the steering roller 71 is substantially cylindrical and has a rotation axis inclined at an angle α relative to a direction substantially perpendicular to the separation plane β, preferably, the angle α is comprised between 30° and 5°, preferably, the angle α is comprised between 25° and 10°, preferably, the angle α is comprised between 20° and 15°. In some embodiments, the angle α is less than or equal to 30°, preferably, the angle α is less than or equal to 20°, preferably, the angle α is less than or equal to 15°, preferably, the angle α is less than or equal to 10°, preferably, the angle α is less than or equal to 5°.

[0224] Therefore, it can be understood that the strip-like member, for example Figure 5 and Figure 6 Deviation of the strips N11 and N21 in relation to a direction substantially perpendicular to the separation plane β may allow increasing the distance d of the two rollers relative to the separation plane β itself.

[0225] Advantageously, the increase in this distance allows the strip-like products N1, N2 to be wound at a greater distance from each other relative to the winding axis, thereby reducing the risk of interference between the two strip-like products, especially when the two winding axes are roughly consistent.

[0226] Deviation of the strip-like element relative to a direction substantially parallel to the separation plane β allows increasing the distance h relative to a plane substantially parallel to the separation plane β itself.

[0227] This feature can be useful, for example, in the following part of the path: the strip-like elements are moved away from each other by the distance d in this part, so as to avoid interference between the strip-like elements and better manage the setting of the spacing rollers. In this case, the distance h can be reduced again, so that the distance h can be returned to substantially zero, and then the two strip-like elements can be run side by side after they have been separated according to the distance d.

[0228] The strip-like members are arranged to deviate relative to a direction substantially parallel to the separation plane, ie, deviate by a distance h, which can also advantageously allow the positions of the first strip-like member N11 and the second strip-like member N21 to be reversed, such as Fig. 7A and Figure 7B As shown in the exemplary embodiment of FIG.

[0229] Preferably, a steering roller 71A configured to move the strips apart and a steering roller 71B configured to move the strips closer together will be provided.

[0230] Advantageously, the turning roller 71A can be configured to increase the distance d and / or the distance h. Similarly, the turning roller 71B can also be configured to decrease the distance d and / or the distance h.

[0231] It will be appreciated that the distance d may be reduced to move the strips closer together while still keeping the strips separated to allow the strips to be reversed, such as Fig. 7A and Figure 7B Alternatively, the strip-shaped members may be overlapped again, as shown in the embodiment of Fig. 8A and Figure 8B As shown in the embodiment shown.

[0232] In some embodiments, for example, Fig. 8A and Figure 8B In the embodiment shown, the reduction of the distance d can in fact be used to obtain at least a partial overlap of the strips.

[0233] In the case shown in the figures, the strips are stacked one on top of the other to allow the strips to be wound on a single winding head, or alternatively, to allow the strips to be wound on two winding heads that are parallel but located in the same plane perpendicular to the winding axis of the winding heads.

[0234] However, it will be appreciated that even partial overlapping of the strips may be provided, for example to perform work involving opposite edges of the respective strips.

[0235] Now refer to it again Figure 1 and Figure 4 In a preferred embodiment, the feeding unit 2 feeds the individual strip-like members N11, N12, N13, N14 and the individual strip-like members N21, N22, N23, N24 in each group toward the winding unit 1, so that the individual strip-like members converge toward the corresponding winding heads.

[0236] The strips N11 , N12 , N13 , N14 and the strips N21 , N22 , N23 , N24 in each group may be combined inside the feed unit 2 to form strip-shaped products N1 , N2 to be wound for making coils.

[0237] As in Figure 1 As observed in the embodiment shown, it can be provided for this purpose that the strips N11, N12, N13, N14 run in different directions, indicated in the figures by reference numerals f1, f2, f3, f4, so as to converge towards a coupling roller 20, to which the rollers are coupled and on which at least one strip is partially wound, so that: downstream of said strip, a single multilayer structure forming the strip-like product N1 is provided. A similar solution can also be provided for the strips N21, N22, N23, N24, which will therefore converge towards the respective coupling roller 20, which can be formed as a single body with respect to the roller 20 on which the strips N11, N12, N13, N14 converge.

[0238] In some embodiments, no coupling roller 20 may be provided and the strips may be coupled to each other directly on the respective winding heads.

[0239] Preferably, the strip is fed continuously into the feed unit 2 .

[0240] In other words, each strip, or possibly one or more of the strips mentioned above, is fed into the feed unit 2 and never stops, traveling at a speed greater than zero and preferably substantially constant.

[0241] It should also be noted that in some embodiments, one or more of the strips N11, N12, N13, N14, N21, N22, N23, N24 may be slowed down or even stopped during their travel towards the coupling roller 20 or more generally towards the winding unit 1.

[0242] This slowing down or stopping can be achieved by a strip holding device which is configured to slow down or stop the feeding of the strip to be slowed down or stopped.

[0243] The holding device 5 may be associated with an accumulation device, not shown in the figures, configured to accumulate a certain number of strips in the event of a continuous feeding of the strips.

[0244] In other words, the action of the accumulation device may be coordinated with the action of the holding device 5 so that the accumulation device accumulates the strip when the holding device slows down or stops feeding the strip.

[0245] For example, in some embodiments, in order to slow down the movement of the strip-like member portion, a gripper 51, 52 or other similar retaining element may be provided, which acts on the corresponding strip-like member when the corresponding strip-like member needs to be stopped or slowed down.

[0246] The gripper(s) 51 , 52 may advantageously be movable in order to adjust the travel speed of the relative strip-like element by controlling the movement of the relative strip-like element.

[0247] The holding device may also be associated with a cutting device, not shown in the figures, which, when necessary, cuts one of the strips to interrupt the continuity of said strip within the strip-like product. It will be appreciated that two cutting devices may be provided, each associated with an associated holding device and therefore with an associated strip-like product, or a single cutting device responsible for cutting both strip-like products.

[0248] The device of the invention also comprises movement means 3 for moving the winding head 10 .

[0249] Preferably, the movement device 3 is configured to move the first winding head 11 and said winding head 12 according to at least one translation and / or rotation about an axis different from said winding axis X1 , X2.

[0250] In some embodiments, during the winding of the strip-like product N1 , N2 , or more generally during the manufacture of the coil, the winding heads 11 , 12 are translated along a displacement direction, and preferably in an alternating movement.

[0251] Preferably, and possibly in combination with the above-described translation, the winding heads 11 , 12 are rotated about a further axis of rotation different from said winding axes X1 , X2 .

[0252] Such a rotation may for example be a rotation about an axis C substantially parallel to said winding axes X1 , X2 and may be performed, when the strip-like product has been wound, to displace the coil from a winding position to another position, for example an unloading position.

[0253] In some embodiments, a mechanical connection 40 may be provided that is configured to interconnect the first winding head and the second winding head so as to perform the above-described movements in a substantially simultaneous manner.

[0254] However, it should be understood that more generally, it is also possible to provide the interconnection means 4 with a type other than a purely mechanical connection, for example with an electronic or electromechanical type.

[0255] Furthermore, the interconnection device 4 may also be configured to provide sequential movement of the two heads with a predetermined order and rate, either alternatively or in combination with substantially simultaneous movement. For example, the first winding head 11 may be moved, and when the movement of the first winding head is completed, the interconnection device 4 may move the second winding head 12.

[0256] from Figure 1 As can be seen from the embodiment of the present invention, the mechanical connection member 40 preferably includes a support body 41, which is rotatable around the axis C, and the support body 41 is configured to support the winding head 10 in a rotatable manner.

[0257] Besides the rotation axis C about the rotatable body 41 , the rotatable body 41 is advantageously also movable in a displacement direction and said rotatable body 41 and, in general, the movement device 3 can be displaced along this displacement direction.

[0258] In other words, in this case, the moving head 10 can not only rotate around itself to wind the strip-shaped articles N1 and N2, but also be displaced following the movement of the rotating body of the moving device 3. Preferably, the moving head 10 is displaced following the linear displacement of the moving device 3.

[0259] To this end, in some embodiments, the support body 41 is in turn supported on the frame structure 42 , and the support body 41 is rotatably connected to the frame structure 42 .

[0260] The frame structure 42 may in turn be movable, for example, the frame structure 42 may be movable by performing the translational movement described above.

[0261] In a preferred embodiment, when one or more of the connecting roller 20, the holding device 5 and the cutting device are provided, the movable frame structure 42 also supports the connecting roller 20, the holding device 5 and the cutting device, so that the connecting roller 20, the holding device 5 and the cutting device can also move together with the frame structure 42.

[0262] Although in the embodiment described in the figures, the support body 41 allows the winding head to rotate simultaneously, and the frame structure 42 allows the winding head to be translated, the interconnection device 4 can generally be configured to also provide a combination of different movements of the winding head. In particular, it can be provided that the winding head performs one or more of the following movements simultaneously or sequentially according to what is shown above: rotation around the respective winding axis X1, X2, translation, rotation around an axis of rotation different from the winding axis X1, X2.

[0263] These movements can also be combined with rotation-translation movements.

[0264] For example, in the above-described embodiment, the winding head is supported on an arm, and such a translation and / or a rotation around an axis different from the winding axis can be achieved by the movement of the arm. Of course, it can be provided that the winding head rotates around the relevant winding axis while moving along the working path defined by the translation / additional rotation.

[0265] In this way, winding can be performed while the winding head is moving, similar to the movement of the frame structure 42 in the embodiment shown in the figures.

[0266] It will also be appreciated that if the winding heads are supported on arms, it may be provided that the distance between the two continuously fed heads along the working path of the heads is variable. For example, the two winding heads will be able to move close together at the end of winding of a coil to cut the strip, whereas the two winding heads will be able to move apart during winding of the strip.

[0267] It goes without saying that, in order to meet specific and occasional application needs, a person skilled in the art will be able to make further modifications and variations, which remain within the scope of protection defined by the appended claims.

Claims

1. A device (100) for manufacturing a coil, preferably an electrochemical cell for battery production, the device (100) comprising: A feeding unit (2), the feeding unit (2) being configured to feed at least a first strip-shaped product (N1) and a second strip-shaped product (N2), the first strip-shaped product (N1) being used to form a first coil (B1), and the second strip-shaped product (N2) being used to form a second strip-shaped product (N2); A winding unit (1), the winding unit (1) comprising a plurality of winding heads (10), the winding heads comprising at least a first winding head (11) and a second winding head (12), the first winding head (11) being configured to wind the first strip-shaped product (N1), the second winding head (12) being configured to wind the second strip-shaped product (N2), the first winding head (11) and the second winding head (12) defining respective winding axes (X1, X2) that are substantially parallel to each other; at least one movement device (3) of the winding head (10), the movement device (3) being configured to move the first winding head (11) and the second winding head (12); In which, the winding unit (1) is constructed to define a separation plane (β), the separation plane (β) is substantially perpendicular to the winding axis (X1, X2), and the separation plane (β) is positioned so that: at least at the first winding head (11) and the second winding head (12), one of the first strip-shaped product (N1) and the second strip-shaped product (N2) is located on one side of the separation plane (β), and the other is located on the opposite side of the separation plane (β).

2. The device (100) for manufacturing a coil according to the preceding claim, wherein: The winding axis (X1) of the first winding head (11) and the winding axis (X2) of the second winding head (12) are substantially coaxial.

3. The device (100) for manufacturing a coil according to any one of the preceding claims, wherein: Each of the winding heads (10) is configured to rotate about a respective one of the winding axes (X1, X2).

4. The device (100) for producing a coil (B) according to the preceding claim, wherein: The winding unit (1) is configured to rotate each of the winding heads (10) around a corresponding one of the winding axes (X1, X2).

5. The device (100) for manufacturing a coil according to the preceding claim, wherein: The moving device (3) is configured to move the first winding head (11) and the second winding head (12) in at least one translation and / or rotation around an axis different from the winding axis (X1, X2), wherein preferably, the at least one translation and / or rotation occurs when the first strip-like product (N1) and / or the second strip-like product (N2) are wound.

6. Plant (100) for manufacturing coils according to the preceding claim, comprising interconnection means (4) for interconnecting the first winding head (11) with the second winding head (12).

7. The device (100) for manufacturing a coil according to the preceding claim, wherein: The interconnection device (4) is configured such that the first winding head (11) and the second winding head (12) substantially at least partially simultaneously perform one or more of the following: Rotation around the corresponding winding axis (X1, X2), · To perform translation, Rotation about a further axis of rotation different from the winding axis (X1, X2).

8. The device (100) for manufacturing a coil according to the preceding claim, wherein: The winding unit (1) is configured such that the first winding head (11) and the second winding head (12) respectively wind the first strip-shaped product (N1) and the second strip-shaped product (N2) substantially at least partially simultaneously.

9. The apparatus (100) for manufacturing a coil according to claim 6, wherein: The interconnection device (4) is configured to cause the second winding head (12) to perform one or more of the following after the first winding head (11) according to a predetermined sequence: Rotation around the corresponding winding axis (X1, X2), · To perform translation, Rotation about a further axis of rotation different from the winding axis (X1, X2).

10. The apparatus (100) for manufacturing a coil according to any one of claims 7 to 9, wherein: The interconnection device (4) comprises a mechanical connection (40).

11. The device (100) for manufacturing a coil according to the preceding claim, wherein: The mechanical connection (40) comprises a support body (41) configured to support the winding head (10) in a rotatable manner.

12. The device (100) for manufacturing a coil according to the preceding claim, wherein: The support body (41) is rotatable about a rotation axis (C) that is substantially parallel to the winding axes (X1, X2).

13. The apparatus (100) for manufacturing a coil according to any one of claims 10 to 12, wherein: The mechanical connection (40) includes a frame structure (42) that supports the winding head (10).

14. The device (100) for manufacturing a coil according to the preceding claim when dependent on claim 11, wherein: The supporting body (41) is rotatably connected to the frame structure (42), and the winding head (10) is supported on the frame structure (42) through the supporting body (41).

15. The apparatus (100) for manufacturing a coil according to claim 13 or 14, wherein: The frame structure (42) is movable.

16. The device (100) for manufacturing a coil according to the preceding claim, wherein: The frame structure (42) is configured to move according to an alternating motion, preferably, the frame structure (42) is configured to move according to a translation.

17. The device (100) for manufacturing a coil according to the preceding claim, wherein: The translation is substantially horizontal.

18. An apparatus (100) for manufacturing coils according to any one of the preceding claims, the apparatus further comprising at least one conveying device (6) and at least one separating device (7), the conveying device (6) being configured to convey a base strip-like member (M), the separating device (7) being configured to separate the base strip-like member (M) to form a first strip-like member (N11) and a second strip-like member (N21), the first strip-like member (N11) and the second strip-like member (N21) being respectively used to form the first strip-like product (N1) and the second strip-like product (N2).

19. The device (100) for manufacturing a coil according to the preceding claim, wherein: The first strip-like member (N11) and the second strip-like member (N21) are separated via the separation plane (β).

20. According to the device (100) for manufacturing coils as described in the previous claim, the device includes a steering roller (71), which is configured to move the second strip-like member (N21) away from the first strip-like member (N11) in a direction approximately perpendicular to the travel direction of the strip-like members (N11, N21). Preferably, the steering roller is configured to move the second strip-like member (N21) away from the first strip-like member (N11) in a direction approximately perpendicular to the travel direction of the strip-like members (N11, N21) and approximately parallel to the winding axis (X1, X2).

21. The apparatus (100) for manufacturing coils according to any one of the preceding claims, comprising four winding heads (10), and preferably comprising six winding heads (10).

22. A method for manufacturing a coil, preferably for use in producing an electrochemical cell for a battery, the method comprising: Providing a first strip-shaped product (N1) and a second strip-shaped product (N2), Winding the first strip-like product (N1) to form a first coil (B1), and winding the second strip-like product (N2) to form a second coil (B2), such that the first strip-like product (N1) and the second strip-like product (N2) are wound around respective winding axes (X1, X2) that are substantially parallel to each other; The first strip-shaped product (N1) and the second strip-shaped product (N2) are separated via a separation plane (β) at least during the winding, and the separation plane (β) is substantially perpendicular to the winding axis (X1, X2).

23. Method for producing a coil according to the preceding claim, wherein: The first strip-shaped product (N1) is wound by means of a first winding head (11), and the second strip-shaped product (N2) is wound by means of a second winding head (12).

24. Method for manufacturing a coil according to the preceding claim, comprising: The first winding head (11) and the second winding head (12) are interconnected so that the first winding head (11) and the second winding head (12) are moved substantially simultaneously or the second winding head (12) is moved after the first winding head (11) according to a predetermined sequence.

25. Method for producing a coil according to the preceding claim, wherein: Making the first winding head (11) and the second winding head (12) move substantially simultaneously or making the second winding head (12) move after the first winding head (11) according to a predetermined sequence comprises one or more of the following: rotating the winding head (10) around a corresponding winding axis (X1, X2), translating the winding head (10), rotating the winding head (10) around another rotation axis different from the winding axis (X1, X2).

26. Method for producing a coil according to the preceding claim, wherein: During the winding of the first strip-like product (N1) and the second strip-like product (N2), the winding head (10) is translated and / or the winding head (10) is rotated around another rotation axis different from the winding axis (X1, X2).

27. A method for manufacturing a coil according to any one of claims 22 to 26, wherein: The winding axis (X1) of the first winding head (11) and the winding axis (X2) of the second winding head (12) are substantially coaxial.

28. A method for manufacturing a coil according to any one of claims 22 to 27, wherein: The further axis of rotation different from the winding axis (X1, X2) is an axis (C) substantially parallel to the winding axis (X1, X2).

29. A method for manufacturing a coil according to any one of claims 22 to 28, wherein: Making the first winding head (11) and the second winding head (12) move substantially simultaneously or making the second winding head (12) move after the first winding head (11) according to a predetermined sequence comprises: making the first winding head (11) and the second winding head (12) move in an alternating motion.

30. A method for manufacturing a coil according to any one of claims 22 to 29, wherein: The alternating movement comprises a translation along a translation axis, preferably the translation axis is substantially horizontal.

31. A method for manufacturing a coil according to any one of claims 22 to 30, the method comprising: The base strip-like member (M) is conveyed and separated to form a first strip-like member (N11) and a second strip-like member (N21), wherein the first strip-like member and the second strip-like member are respectively used to form the first strip-like product (N1) and the second strip-like product (N2).

32. Method for manufacturing a coil according to the preceding claim, comprising: The second strip-like member (N21) is moved away from the first strip-like member (N11) in a direction substantially perpendicular to the travel direction of the strip-like members (N11, N21), so that the first strip-like member (N11) and the second strip-like member (N21) are separated via the separation plane (β).

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