阅读说明：本技术 电芯卷绕设备及制造卷绕电芯的方法 (Cell winding device and method for manufacturing winding cell ) 是由 不公告发明人 于 2019-10-15 设计创作，主要内容包括：本申请提供一种电芯卷绕设备,其包括卷绕机构、隔膜供料组件、第一极片供料组件、第二极片供料组件；所述隔膜供料组件用于向所述卷绕机构提供用于制造卷绕电芯的隔膜料带,所述第一极片供料组件与第二极片供料组件用于向所述卷绕机构提供用于制造卷绕电芯的正极片料带和负极片料带；所述卷绕机构包括可旋转的且能够相互对准而形成用于对所述隔膜料带进行卷绕的卷针组件的第一卷针和第二卷针,所述卷针组件形成有用于让所述隔膜料带穿过的狭缝。本申请还提供一种可通过上述电芯卷绕设备实现的制造卷绕电芯的方法。(The application provides a battery cell winding device which comprises a winding mechanism, a diaphragm feeding assembly, a first pole piece feeding assembly and a second pole piece feeding assembly; the diaphragm feeding assembly is used for providing a diaphragm material belt for manufacturing a wound battery cell for the winding mechanism, and the first pole piece feeding assembly and the second pole piece feeding assembly are used for providing a positive pole piece material belt and a negative pole piece material belt for manufacturing the wound battery cell for the winding mechanism; the winding mechanism comprises a first winding needle and a second winding needle which are rotatable and can be aligned with each other to form a winding needle assembly for winding the membrane material belt, and the winding needle assembly is provided with a slit for the membrane material belt to pass through. The application also provides a method for manufacturing the winding battery cell, which can be realized by the battery cell winding equipment.)

1. The battery cell winding equipment is characterized by comprising a winding mechanism, a diaphragm feeding assembly, a first pole piece feeding assembly and a second pole piece feeding assembly; the diaphragm feeding assembly is used for providing a diaphragm material belt for manufacturing a wound battery cell for the winding mechanism, and the first pole piece feeding assembly and the second pole piece feeding assembly are used for providing a positive pole piece material belt and a negative pole piece material belt for manufacturing the wound battery cell for the winding mechanism; the winding mechanism comprises a first winding needle and a second winding needle which are rotatable and can be aligned with each other to form a winding needle assembly for winding the membrane material belt, and the winding needle assembly is provided with a slit for the membrane material belt to pass through.

2. The cell winding apparatus of claim 1, wherein the membrane supply assembly includes a membrane unwinding mechanism configured to receive the strip of membrane material and a membrane pulling mechanism configured to pull the strip of membrane material through the slit after being unwound from the membrane unwinding mechanism.

3. The cell winding apparatus of claim 1, wherein the first winding pin and the second winding pin are shaped as half cylinders having the same size, and both have a half-cylindrical outer side and a flat inner side.

4. The cell winding apparatus of claim 3, wherein when the inner side surface of the first winding needle and the inner side surface of the second winding needle are aligned with each other, the slit is formed between the inner side surface of the first winding needle and the inner side surface of the second winding needle, and the outer side surface of the first winding needle and the outer side surface of the second winding needle face outward, so that the first winding needle and the second winding needle jointly constitute the winding needle assembly; the outer contour of the winding needle assembly is approximately cylindrical, and the slit is formed along the diameter direction.

5. The cell winding apparatus of claim 4, wherein the first pole piece feed assembly is configured to feed the positive pole piece strip from one side of the separator strip passing through the slit to between the separator strip and the winding needle assembly, and the second pole piece feed assembly is configured to feed the negative pole piece strip from an opposite side of the separator strip passing through the slit to between the separator strip and the winding needle assembly.

6. The cell winding apparatus of claim 5, wherein the winding pin assembly is configured to wind the separator material strip passing through the slit, a positive electrode sheet material strip fed between the separator material strip and the winding pin assembly from one side of the separator material strip passing through the slit, and a negative electrode sheet material strip fed between the separator material strip and the winding pin assembly from an opposite side of the separator material strip passing through the slit to form a wound cell body when rotated.

7. The cell winding apparatus of claim 1, further comprising a glue preparation mechanism and a gluing mechanism, wherein the glue preparation mechanism is configured to provide a tape, and the gluing mechanism is configured to convey the tape to the winding cell body for gluing to form a winding cell.

8. The cell winding apparatus of claim 1, wherein the membrane supply assembly includes a membrane cutting mechanism for cutting the strip of membrane material, the first pole piece supply assembly includes a first pole piece cutting mechanism for cutting the strip of positive pole piece material, and the second pole piece supply assembly includes a second pole piece cutting mechanism for cutting the strip of negative pole piece material.

9. The cell winding apparatus of claim 1, further comprising a mounting plate on which the winding mechanism, the diaphragm feed assembly, the first pole piece feed assembly, and the second pole piece feed assembly are mounted; first pole piece feed subassembly includes first pole piece inserted sheet mechanism, second pole piece feed subassembly includes second pole piece inserted sheet mechanism, just diaphragm feed subassembly, first pole piece inserted sheet mechanism, second pole piece inserted sheet mechanism can both be along the perpendicular to the direction reciprocating motion of mounting panel.

10. A method of manufacturing a wound cell, comprising the steps of:

forming a slit by using a winding needle assembly, and clamping the diaphragm material belt in the slit;

conveying the positive plate material belt and the negative plate material belt to a position between the winding needle assembly and the diaphragm material belt;

and winding the diaphragm material belt, the positive plate material belt and the negative plate material belt to form a cell main body of the wound cell.

11. The method of manufacturing a wound cell of claim 10, wherein prior to feeding the strip of positive and negative sheets between the winding needle assembly and the strip of separator material, the method of manufacturing a wound cell further comprises the steps of:

and pulling out the diaphragm material belt by a preset length, and driving the winding needle assembly to clamp the diaphragm material belt and wind the diaphragm material belt clockwise or anticlockwise for a preset number of turns.

12. The method of manufacturing a wound cell of claim 10, further comprising the steps of:

when the winding of the battery cell main body is about to be completed, performing auxiliary positioning on the battery cell main body;

and cutting off the diaphragm material belt, the positive plate material belt and the negative plate material belt which are connected with the electric core main body, and gluing the electric core main body.

Technical Field

The present disclosure relates to the field of battery manufacturing equipment, and in particular, to a battery cell winding apparatus and a method for manufacturing a wound battery cell.

Background

Wound cells are currently widely used in batteries. The production of wound cells requires the use of specialized cell winding equipment. In some small and miniature electronic devices, miniature batteries with small volume and compact structure are generally required to be used, for example, the diameter of a cylindrical battery commonly used in a bluetooth headset is generally only about 3 mm, but the wound battery core manufactured by the existing battery core winding device is difficult to meet the requirement in this aspect.

Disclosure of Invention

The technical problem that this application mainly solved provides a higher electric core coiling equipment of preparation precision, can produce the volume littleer, coil tighter coiling electric core.

In order to solve the above technical problem, one technical solution adopted in the embodiments of the present application is: a battery cell winding device comprises a winding mechanism, a diaphragm feeding assembly, a first pole piece feeding assembly and a second pole piece feeding assembly; the diaphragm feeding assembly is used for providing a diaphragm material belt for manufacturing a wound battery cell for the winding mechanism, and the first pole piece feeding assembly and the second pole piece feeding assembly are used for providing a positive pole piece material belt and a negative pole piece material belt for manufacturing the wound battery cell for the winding mechanism; the winding mechanism comprises a first winding needle and a second winding needle which are rotatable and can be aligned with each other to form a winding needle assembly for winding the membrane material belt, and the winding needle assembly is provided with a slit for the membrane material belt to pass through.

The diaphragm feeding assembly comprises a diaphragm unwinding mechanism and a diaphragm traction mechanism, the diaphragm unwinding mechanism is used for installing the diaphragm material belt, and the diaphragm traction mechanism is used for drawing the diaphragm material belt which penetrates through the slit after being discharged from the diaphragm unwinding mechanism.

The first winding needle and the second winding needle are semi-cylindrical in the same size and both have semi-cylindrical outer side faces and planar inner side faces.

When the inner side surface of the first winding needle and the inner side surface of the second winding needle are aligned with each other, the slit is formed between the inner side surface of the first winding needle and the inner side surface of the second winding needle, and meanwhile, the outer side surface of the first winding needle and the outer side surface of the second winding needle face outwards, so that the first winding needle and the second winding needle jointly form the winding needle assembly; the outer contour of the winding needle assembly is approximately cylindrical, and the slit is formed along the diameter direction.

The first pole piece feeding assembly is used for conveying the positive pole piece material belt to a position between the diaphragm material belt and the winding needle assembly from one side of the diaphragm material belt penetrating through the slit, and the second pole piece feeding assembly is used for conveying the negative pole piece material belt to a position between the diaphragm material belt and the winding needle assembly from the other opposite side of the diaphragm material belt penetrating through the slit.

The winding needle assembly is used for winding the diaphragm material strip passing through the slit, a positive plate material strip conveyed between the diaphragm material strip and the winding needle assembly from one side of the diaphragm material strip passing through the slit and a negative plate material strip conveyed between the diaphragm material strip and the winding needle assembly from the other opposite side of the diaphragm material strip passing through the slit so as to form a winding cell main body.

The battery cell winding equipment further comprises a glue preparing mechanism and a glue pasting mechanism, wherein the glue preparing mechanism is used for providing a glue tape, and the glue pasting mechanism is used for conveying the glue tape to the winding battery cell main body for pasting so as to manufacture a winding battery cell.

The diaphragm feeding assembly comprises a diaphragm cutting mechanism used for cutting off a diaphragm material belt, the first pole piece feeding assembly comprises a first pole piece cutting mechanism used for cutting off a positive pole piece material belt, and the second pole piece feeding assembly is used for cutting off a second pole piece cutting mechanism used for cutting off a negative pole piece material belt.

The battery cell winding equipment further comprises a mounting plate, and the winding mechanism, the diaphragm feeding assembly, the first pole piece feeding assembly and the second pole piece feeding assembly are all mounted on the mounting plate; first pole piece feed subassembly includes first pole piece inserted sheet mechanism, second pole piece feed subassembly includes second pole piece inserted sheet mechanism, just diaphragm feed subassembly, first pole piece inserted sheet mechanism, second pole piece inserted sheet mechanism can both be along the perpendicular to the direction reciprocating motion of mounting panel.

The present application also provides a method of manufacturing a wound cell, comprising the steps of:

forming a slit by using a winding needle assembly, and clamping the diaphragm material belt in the slit;

conveying the positive plate material belt and the negative plate material belt to a position between the winding needle assembly and the diaphragm material belt;

and winding the diaphragm material belt, the positive plate material belt and the negative plate material belt to form a cell main body of the wound cell.

Wherein, before the positive electrode sheet material tape and the negative electrode sheet material tape are conveyed between the winding needle assembly and the diaphragm material tape, the method for manufacturing the winding cell further comprises the following steps:

and pulling out the diaphragm material belt by a preset length, and driving the winding needle assembly to clamp the diaphragm material belt and wind the diaphragm material belt clockwise or anticlockwise for a preset number of turns.

Wherein the method of manufacturing a wound cell further comprises the steps of:

when the winding of the battery cell main body is about to be completed, performing auxiliary positioning on the battery cell main body;

and cutting off the diaphragm material belt, the positive plate material belt and the negative plate material belt which are connected with the electric core main body, and gluing the electric core main body.

Compared with the existing winding cell manufacturing technology, the cell winding device and the method for manufacturing the winding cell provided by the application according to the above preferred embodiment can achieve the following beneficial effects: (1) the winding needle assembly with the structure is formed by oppositely inserting the first winding needle and the second winding needle with the structure, so that the clamping fastness and the winding precision of the diaphragm and the pole piece material belt can be further improved, a small-specification winding battery cell with compact winding and excellent quality is manufactured, and the requirements of various small-sized and miniature electronic equipment are met; (2) by adopting the diaphragm traction mechanism to draw the diaphragm in the working mode, the tension stability in the winding process is ensured, and the winding efficiency and quality can be improved. (3) The winding mode of a single diaphragm plus positive and negative pole pieces is adopted, so that the structure is simpler and more compact.

Drawings

Fig. 1 is a schematic layout structure diagram of a cell winding apparatus according to a preferred embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first", "second", etc. in this application are used to distinguish between different objects and not to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Fig. 1 is a schematic layout structure diagram of a cell winding apparatus 100 according to a preferred embodiment of the present application. In this embodiment, the battery cell winding apparatus 100 includes a mounting plate 101, a winding mechanism 10, a pressing mechanism 20, a diaphragm feeding assembly 30, a first pole piece feeding assembly 40, a second pole piece feeding assembly 50, a glue preparing mechanism 60, a gluing mechanism 70, and a discharging mechanism 80.

The mounting plate 101 may be a part of a working machine, and the winding mechanism 10, the pressing mechanism 20, the diaphragm feeding assembly 30, the first pole piece feeding assembly 40, the second pole piece feeding assembly 50, the glue preparing mechanism 60, the glue applying mechanism 70, and the discharging mechanism 80 may all be mounted on the mounting plate 101, so that the whole cell winding apparatus 100 becomes an integral structure.

The winding mechanism 10 may include a first winding pin 11 and a second winding pin 12. The first winding pin 11 and the second winding pin 12 are preferably arranged so as to be able to be arranged adjacent to each other and parallel to each other on the mounting plate 101, so that various winding materials to be subjected to the winding process can be clamped between the first winding pin 11 and the second winding pin 12. Further preferably, in the present embodiment, the first winding needle 11 and the second winding needle 12 may have a semi-cylindrical shape with the same size, and both have a semi-cylindrical outer side surface (not numbered in the figure) and a planar inner side surface (not numbered in the figure). In this embodiment, the inner side surface of the first winding needle 11 and the inner side surface of the second winding needle 12 may be aligned with each other, and the inner side surface of the first winding needle 11 and the inner side surface of the second winding needle 12 may be arranged parallel to each other, close to each other, but not in contact with each other, and a slit 13 through which the wound material to be wound may pass may be formed between the inner side surface of the first winding needle 11 and the inner side surface of the second winding needle 12; in this case, the outer side of the first winding needle 11 and the outer side of the second winding needle 12 face outward and are split into a substantially cylindrical surface, so that the first winding needle 11 and the second winding needle 12 together form a winding needle assembly (not numbered in the figure) having a substantially cylindrical outer contour and forming the slit 13 in a diameter direction.

The pressing mechanism 20 may include an existing pressing member for pressing the winding material, such as a pressing roller; the winding mechanism is arranged on the mounting plate 101 at a position adjacent to the winding mechanism 10, and can be used for pressing winding materials, such as positive and negative pole piece material belts or diaphragm material belts, wound on the first winding needle 11 and the second winding needle 12 during winding processing, so that the winding materials are prevented from loosening or scattering, the winding precision is improved, and the wound battery cell structure is more compact.

The membrane supply assembly 30 may include a membrane unwinding mechanism 31, a membrane pulling mechanism 32, a membrane auxiliary positioning member 33, and a membrane cutting mechanism 34. The membrane unwinding mechanism 31 may be used to install a membrane material roll required for manufacturing a wound battery cell, and a membrane material tape for winding processing may be discharged from the membrane material roll. The membrane traction mechanism 32 may include a power device (not shown) for driving the membrane material belt to move, and the power device may be any power device known in the art, such as a motor, a cylinder, etc., so that the detailed construction and operation thereof need not be described in detail. In the present embodiment, the membrane unwinding mechanism 31 and the membrane traction mechanism 32 are preferably disposed at positions adjacent to both ends of the slit 13 formed between the first winding needle 11 and the second winding needle 12 of the winding mechanism 10, respectively, so that the end of the membrane material tape fed from the membrane material roll mounted on the membrane unwinding mechanism 31 can pass through the slit 13 and then be fixed to the membrane traction mechanism 32, and can be pulled by the membrane traction mechanism 32. Further preferably, in the present embodiment, the diaphragm pulling mechanism 32 is configured to be capable of reciprocating in a direction perpendicular to the mounting plate 101 (i.e., a direction perpendicular to the paper surface as viewed in fig. 1), and is used to correct a positional deviation of the diaphragm material tape pulled by the diaphragm pulling mechanism 32 in the width direction thereof. The auxiliary diaphragm positioning element 33 may include, for example, at least one roller for performing auxiliary tensioning on the diaphragm material tape at the diaphragm unwinding mechanism 31 and the diaphragm pulling mechanism 32, and may also be used for changing the conveying direction of the diaphragm material tape. In the present embodiment, at least one over-roller of the diaphragm auxiliary positioning member 33 is preferably disposed between the diaphragm unwinding mechanism 31 and the winding mechanism 10. The membrane cutting mechanism 34 may be arranged at any position on the mounting plate 101 suitable for cutting the membrane material strip pulled by the membrane pulling mechanism 32, and in the present embodiment, is preferably arranged between at least one over-roll of the membrane auxiliary positioning member 33 and the winding mechanism 10.

First pole piece feed assembly 40 and second pole piece feed assembly 50 are preferably disposed on opposite sides of winding mechanism 10, respectively. The first pole piece feeding assembly 40 may include a first pole piece unwinding mechanism 41, a first pole piece inserting mechanism 42, and a first pole piece cutting mechanism 43. The first pole piece unwinding mechanism 41 can be used for mounting a pole piece material roll required for manufacturing a wound battery cell, such as a positive pole piece material roll or a negative pole piece material roll, and is preferably used for mounting the positive pole piece material roll in the present embodiment. The first pole piece inserting mechanism 42 may include at least two first pressing rollers (not numbered in the figure), which are preferably disposed in parallel and close to each other between the first pole piece unwinding mechanism 41 and the winding mechanism 10, and the pole piece material tape fed from the pole piece material roll may be clamped between the at least two first pressing rollers under the rotation driving of at least one of the at least two first pressing rollers, pressed and flattened by the at least two first pressing rollers, and then extruded from between the at least two first pressing rollers, and provided to the winding mechanism 10 for winding processing. The first pole piece cutting mechanism 43 may be disposed at any position on the mounting plate 101 suitable for cutting the pole piece fed from the pole piece roll on the first pole piece feeding mechanism 41, and in the present embodiment, is preferably disposed between the first pole piece inserting mechanism 42 and the winding mechanism 10. Preferably, the at least two first squeeze rollers are both arranged to be mounted on the mounting plate 101 perpendicularly to the mounting plate 101, and both can reciprocate along a direction perpendicular to the mounting plate 101 (i.e. a direction perpendicular to the paper surface as viewed in fig. 1), and can be used for correcting the position deviation of the pole piece material belt clamped by the at least two first squeeze rollers in the width direction of the pole piece material belt.

The second pole piece feeding assembly 50 may include a second pole piece unwinding mechanism 51, a second pole piece inserting mechanism 52, and a second pole piece cutting mechanism 53. The second pole piece unwinding mechanism 51 may be used to mount a pole piece material roll required for manufacturing a wound battery cell, such as a positive pole piece material roll or a negative pole piece material roll, and is preferably used to mount a negative pole piece material roll in the present embodiment. The second pole tab inserting mechanism 52 may include at least two second pressing rollers (not numbered), which are preferably disposed in parallel and close to each other between the second pole tab unwinding mechanism 51 and the winding mechanism 10, and the pole tab material strip fed from the pole tab material roll may be clamped between the at least two second pressing rollers under the rotation driving of at least one of the at least two second pressing rollers, pressed and flattened by the at least two second pressing rollers in cooperation with each other, and then extruded from between the at least two second pressing rollers and provided to the winding mechanism 10 for winding. The second pole piece cutting mechanism 53 may be disposed on the mounting plate 101 at any location suitable for cutting the pole piece web being paid out from the pole piece roll on the second pole piece unwinding mechanism 51, and in this embodiment is preferably disposed between the second pole piece tab mechanism 52 and the winding mechanism 10. Preferably, the at least two second squeeze rollers are both arranged to be mounted on the mounting plate 101 perpendicularly to the mounting plate 101, and both can reciprocate along a direction perpendicular to the mounting plate 101 (i.e. a direction perpendicular to the paper surface as viewed in fig. 1), and can be used for correcting the position deviation of the pole piece material belt clamped by the at least two second squeeze rollers in the width direction of the pole piece material belt.

It is understood that the positive and negative electrode sheet belts are driven by the rotation of the squeeze rollers in this embodiment, but in other embodiments, the positive and negative electrode sheet belts may also be driven by non-rotation, for example, a motor, a screw rod and a sliding mechanism may be used to form an inserting device for driving the electrode sheet belts in a translation manner according to the existing screw rod driving manner.

The glue preparation mechanism 60 may be mounted on the mounting plate 101 at any position suitable for delivering tape to the winding mechanism 10 for supplying the winding mechanism 10 with the tape required for manufacturing wound cells. The taping mechanism 70 is used for taking out the adhesive tape from the tape preparing mechanism 60 and moving the adhesive tape to the winding mechanism 10 for winding. In the present embodiment, the taping mechanism 70 is preferably mounted on the mounting plate 101 at a position between the standby mechanism 60 and the winding mechanism 10, and includes a taping roller 71 for moving the tape and a taping roller driving member 72 for driving the taping roller 71. The blanking mechanism 80 may be mounted on the mounting plate 101 at any position suitable for removing the wound battery cells from the winding mechanism 10, so as to remove the battery cell products wound by the winding mechanism 10 for further winding of subsequent products.

The present application also provides a method for manufacturing a wound cell, which can be implemented by using the above-described cell winding apparatus 100. According to a preferred embodiment of the present application, a method for manufacturing a wound cell may include the steps listed below.

S0: the cell winding apparatus 100 as described above is provided.

S1: materials required for manufacturing a wound cell are mounted on the cell winding apparatus 100. The materials may include separator rolls, positive pole piece rolls, negative pole piece rolls, and tapes. This step S1 may further include the sub-steps listed below.

S11: and installing the membrane material roll. Specifically, the sub-step S11 may include: mounting a membrane material roll required for manufacturing a winding battery core on a membrane unwinding mechanism 31 by using an existing mounting mode, and discharging a membrane material belt from the membrane material roll; the membrane material roll is preferably a single-layer membrane material roll, so that the discharged membrane material belt is a single-layer membrane material belt; the strip of membrane material is passed through the slit 13 between the first winding needle 11 and the second winding needle 12, and then the end of the strip of membrane material is connected to the membrane traction mechanism 32, so that the membrane traction mechanism 32 can move the strip of membrane material, thereby continuously discharging the strip of membrane material from the membrane material roll. In this sub-step S11, the strip of diaphragm material may also be tensioned in place by at least one over-roller of the diaphragm auxiliary positioning element 33 to improve the working quality of the winding process.

S12: and installing the positive pole piece material roll. Specifically, the sub-step S12 may include: the method comprises the steps of mounting a positive plate material roll required for manufacturing a wound cell on a first plate unwinding mechanism 41 by using an existing mounting method, for example, paying out a positive plate material strip from the positive plate material roll, placing the end part of the positive plate material strip to a position between at least two first squeezing rollers close to the first plate insertion mechanism 42, then driving the at least two first squeezing rollers to rotate by using an existing power device such as a motor, for example, so that the positive plate material strip paid out from the positive plate material roll is clamped between the at least two first squeezing rollers under the rotation driving of at least one first squeezing roller of the at least two first squeezing rollers, squeezed by the at least two first squeezing rollers to be flat, and then squeezed out from between the at least two first squeezing rollers.

S13: and installing a negative plate material roll. Specifically, the sub-step S13 may include: mounting a negative electrode sheet material roll required for manufacturing a wound cell on a second electrode sheet unwinding mechanism 51 through an existing mounting manner, for example, paying out a negative electrode sheet material strip from the negative electrode sheet material roll, placing an end of the negative electrode sheet material strip to a position between the at least two second pressing rollers close to the second electrode sheet inserting mechanism 52, then driving the at least two second pressing rollers to rotate through an existing power device, for example, a motor, so that the negative electrode sheet material strip paid out from the negative electrode sheet material roll is clamped between the at least two second pressing rollers under the rotation driving of the at least one second pressing roller, is pressed and flattened by the at least two second pressing rollers, and is then extruded from between the at least two second pressing rollers.

S14: and (6) installing an adhesive tape. The adhesive tape required for manufacturing the wound cells is mounted on the adhesive preparation mechanism 60.

It should be noted herein that the sequence numbers of the sub-steps S11, S12, S13 and S14 are only for distinguishing them, and do not represent the execution order of the sub-steps. It will be appreciated that the sub-steps may obviously be performed separately in any order or simultaneously; in performing the above substeps 12 and S13, the positive electrode tab roll may be mounted on the second electrode tab unwinding mechanism 51, the positive electrode tab material tape may be driven by the second electrode tab inserting mechanism 52, the negative electrode tab roll may be mounted on the first electrode tab unwinding mechanism 41, and the negative electrode tab material tape may be driven by the first electrode tab inserting mechanism 42.

S2: and winding the diaphragm material belt, the positive plate material belt and the negative plate material belt by using the battery cell winding equipment to form a battery cell main body of a wound battery cell. This step S2 may further include the sub-steps listed below.

S21: the aforementioned needle assembly is formed by said first 11 and second 12 needles in a reciprocal manner, clamping the strip of septum material in the slit 13. Preferably, the sub-step S21 may include the following operations: abutting the inner side surface of the first winding needle 11 against one side of the membrane material belt, and moving the first winding needle 11 along a preset first direction (for example, a direction which is outward from the vertical paper surface according to the view angle of fig. 1); the inner side of the second winding needle 12 is applied against the other side of the strip of septum material and the second winding needle 12 is moved in a predetermined second direction (e.g. in a direction perpendicular to the paper and inwards in the view of fig. 1; such that the first winding needle 11 and the second winding needle 12 are inserted parallel to each other until the two ends of the first winding needle 11 and the second winding needle 12 are aligned with each other, such that the first winding needle 11 and the second winding needle 12 together constitute the aforementioned winding needle assembly and the aforementioned slit 13 is formed between the inner side of the first winding needle 11 and the inner side of the second winding needle 12, and the strip of septum material is clamped in the slit 13.

S22: and pre-rolling the diaphragm material belt. Preferably, the sub-step S22 may include: the first winding needle 11 and the second winding needle 12 are driven to rotate by, for example, an existing power device (e.g., a motor, etc.), so that the winding needle assembly clamps the membrane material belt and pre-winds the membrane material belt clockwise or counterclockwise for a preset number of turns. During pre-winding, the membrane traction mechanism 32 can be simultaneously moved toward the needle winding mechanism 10 so that the strip of membrane material can be wound on the needle winding assembly.

S23: and conveying the positive plate material belt and the negative plate material belt between the winding needle assembly and the diaphragm material belt. Preferably, the sub-step S23 may include the following operations: the at least two first squeezing rollers of the first pole piece tab inserting mechanism 42 are driven to rotate by, for example, an existing power device (e.g., a power device such as a motor), so that the positive pole piece material strip or the negative pole piece material strip (in this embodiment, the positive pole piece material strip) squeezed out from between the at least two first squeezing rollers is conveyed from one side (e.g., the left side in fig. 1) of the membrane material strip to between the membrane material strip and the winding needle assembly; the at least two second pressing rollers of the second pole piece inserting mechanism 52 are driven to rotate by, for example, an existing power device (e.g., a power device such as a motor), so that the positive pole piece material strip or the negative pole piece material strip (in this embodiment, the negative pole piece material strip) extruded between the at least two second pressing rollers is conveyed from the opposite side (e.g., the right side in fig. 1) of the membrane material strip to between the membrane material strip and the winding needle assembly.

S24: and driving the first winding needle 11 and the second winding needle 12 to rotate, and winding the positive plate material belt, the diaphragm material belt and the negative plate material belt together to form a cell main body. Preferably, the sub-step S24 may include: the first winding needle 11 and the second winding needle 12 are driven to rotate by, for example, an existing power device (e.g., a motor, etc.), so as to drive the positive electrode sheet material tape and the negative electrode sheet material tape to be respectively wound between the separator material tape and the winding needle assembly, and along with the rotation of the winding needle assembly, the positive electrode sheet material tape, the separator material tape and the negative electrode sheet material tape are wound together to form the cell main body. During the winding process, the separator traction mechanism 32 can be moved moderately in the direction close to the winding needle assembly to transfer the separator material tape to the winding needle assembly, and the separator material tape, the positive electrode material tape and the negative electrode material tape are continuously discharged by using the separator unwinding mechanism 31, the first pole piece unwinding mechanism 41 and the second pole piece unwinding mechanism 42, respectively.

Preferably, during the execution of the above steps S1 and S2, the method may further include the following additional steps: s1a, performing deviation rectifying operation on the materials required for manufacturing the winding battery core. Specifically, the step S1a may include any one or more of the following operations: the diaphragm pulling mechanism 32 is moved in a direction perpendicular to the mounting plate 101 (i.e., a direction perpendicular to the paper surface in the view of fig. 1), and the positional deviation of the diaphragm material tape clamped by the diaphragm pulling mechanism 32 in the width direction thereof is corrected; reciprocating the at least two first squeeze rollers of the first pole piece tab inserting mechanism 42 along a direction perpendicular to the mounting plate 101 (i.e. a direction perpendicular to the paper surface as viewed from the perspective of fig. 1), so as to correct the position deviation of the pole piece material belt clamped by the at least two first squeeze rollers in the width direction thereof; the at least two second pressing rollers of the second pole piece inserting mechanism 52 are reciprocated along a direction perpendicular to the mounting plate 101 (i.e. a direction perpendicular to the paper surface as viewed from the perspective of fig. 1), so as to correct the position deviation of the pole piece material belt clamped by the at least two second pressing rollers in the width direction thereof.

S3: and gluing the cell main body to manufacture a winding cell. This step S3 may further include the sub-steps listed below.

S31: the tape is taken out from the tape preparing mechanism 60 by the taping mechanism 70. Specifically, the sub-step S31 may include the following operations: the tape is sucked from the tape preparation mechanism 60 using the taping roller 71 of the taping mechanism 70.

S32: and when the winding of the battery cell main body is about to be completed, performing auxiliary positioning on the battery cell main body about to be completed. Specifically, the sub-step S32 may include the following operations: moving the pressing mechanism 20 to abut against one side of the to-be-wound battery cell main body on the winding needle assembly along a direction close to the winding needle assembly, and pressing the battery cell main body; the rubberizing roller 71 is moved along the direction close to the winding needle assembly to abut against the other side of the to-be-wound battery cell body on the winding needle assembly, and the battery cell body is pressed from the other direction.

S33: and cutting off the diaphragm material belt, the positive plate material belt and the negative plate material belt which are connected with the electric core main body, and gluing the electric core main body. Preferably, the cutting of the separator material tape, the positive electrode sheet material tape and the negative electrode sheet material tape connected to the cell main body may include the following operations: when the winding operation of one cell main body is about to be completed, the diaphragm cutting mechanism 34, the positive electrode cutting mechanism 43, and the negative electrode cutting mechanism 53 are driven and controlled by, for example, an existing power device (e.g., a power device such as a motor) to operate in a predetermined sequence or simultaneously, so that the diaphragm material tape located between the diaphragm unwinding mechanism 31 and the winding needle assembly 10, the positive electrode material tape or the negative electrode material tape (the positive electrode material tape in this embodiment) located between the first electrode tab inserting mechanism 42 and the winding needle assembly, and the positive electrode material tape or the negative electrode material tape (the negative electrode material tape in this embodiment) located between the second electrode tab inserting mechanism 52 and the winding needle assembly are cut in a predetermined sequence or simultaneously, and the diaphragm material tape margin, the positive electrode material tape margin, and the negative electrode sheet margin that are connected to the cell main body and have a certain length and are left. The rubberizing of the cell body may then include the following operations: controlling the winding needle assembly to continue winding the diaphragm material belt allowance, the positive plate material belt allowance and the negative plate material belt allowance, and driving the pressing roller and the rubberizing roller 71 to synchronously rotate to terminate in the winding process; the cut ends of the diaphragm material belt, the positive plate material belt and the negative plate material belt are all wrapped up until the end, pulled by the diaphragm traction mechanism 32, of the diaphragm material belt is wound, and the pulled end of the diaphragm material belt is released by controlling the diaphragm traction mechanism 32; and then, continuing to wind until the end part of the diaphragm material belt released by the diaphragm traction mechanism 32 rotates to be aligned with the adhesive tape on the rubberizing roller 71, controlling the rubberizing roller 71 to paste the adhesive tape on the cell main body at the moment, and sealing the released end part of the diaphragm material belt by the adhesive tape to prevent the cell from loosening, thus obtaining the wound cell.

It is to be understood that the sub-step S31 is not necessarily performed before the sub-step S32, and may be performed simultaneously with the sub-step S32 or after the sub-step S32, as long as it is performed before the sub-step S33.

S4: a blanking operation is performed to remove the manufactured wound battery cell from the battery cell winding apparatus 100. This step S4 may further include the sub-steps listed below.

S41: the first winding needle 11 and the second winding needle 12 are driven to move to a predetermined blanking station.

S42: the manufactured wound cells are clamped using a blanking mechanism 80.

S43: and (5) blanking by using a blanking mechanism 80, and taking the manufactured winding battery cell away.

Preferably, the step S4 may further include the sub-step S44: the first winding needle 11 and the second winding needle 12 are driven to move to a predetermined winding station, so as to perform the subsequent winding operation of the next wound battery cell according to the steps.

Compared with the existing winding cell manufacturing technology, the cell winding device and the method for manufacturing the winding cell provided by the application according to the above preferred embodiment can achieve the following beneficial effects: (1) the first winding needle 11 and the second winding needle 12 with the structure are inserted oppositely to form the winding needle assembly with the structure, so that the clamping fastness and the winding precision of the diaphragm and the pole piece material belt can be further improved, a small-specification winding battery cell with compact winding and excellent quality is manufactured, and the requirements of various small-size and miniature electronic equipment are met; (2) by adopting the diaphragm traction mechanism 32 to draw the diaphragm in the working mode, the tension stability in the winding process is ensured, and the winding efficiency and quality can be improved. (3) The winding mode of a single diaphragm plus positive and negative pole pieces is adopted, so that the structure is simpler and more compact.

The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not intended to limit the scope of the present application, which is defined by the appended claims and their equivalents, and all changes that can be made therein without departing from the spirit and scope of the invention.