Winding shaft and winding device

Abstract

The present disclosure relates to the technical field of battery processing devices, and in particular to a winding shaft and a winding device. The winding shaft comprises: a winding shaft body; a gap formed in the winding shaft body and used for receiving a free end of a material strip; and an attraction structure arranged on the winding shaft body and used for attracting and fixing the free end to the winding shaft body so as to enable the free end to be located in the gap. In the winding shaft provided in the present disclosure, on one hand, the manufacturing costs of the whole winding device can be reduced, and on the other hand, a process of mounting a clamping structure in the gap is not required, so that the difficulty in mounting the winding shaft can be reduced. Furthermore, since a clamping structure can be omitted, the overall size of the winding shaft can be further reduced. Finally, the insertion efficiency can be improved.

Description

Rolling needle and rolling device

[0001] The present disclosure claims priority to the Chinese patent application No. 202420827177.8, filed on April 19, 2024, and entitled "Rolling needle and rolling device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of battery processing equipment, and in particular to a rolling needle and a rolling device. BACKGROUND

[0003] The rolling device is a device for processing a battery roll core. Specifically, the rolling device usually includes a rolling needle. When processing the roll core by the rolling device, first, a separator needs to be inserted into a gap of the rolling needle, then the separator needs to be clamped in the gap by a clamping structure arranged in the gap to realize a needle insertion action of the separator, and finally the rolling needle needs to be rotated to realize the purpose of processing the roll core.

[0004] However, when the needle insertion action of the separator is realized by the clamping manner of the clamping structure, on the one hand, the manufacturing cost of the rolling device will be increased due to the complex structure of the clamping structure, and on the other hand, the installation difficulty of the rolling needle will be increased due to the need to install the clamping structure in the gap. SUMMARY

[0005] The present disclosure provides a rolling needle and a rolling device, which can reduce the manufacturing cost of the rolling device, reduce the installation difficulty of the rolling needle, and improve the needle insertion efficiency.

[0006] To achieve the above-mentioned purpose, in a first aspect, the present disclosure provides a rolling needle, comprising:

[0007] a rolling needle body;

[0008] a gap formed in the rolling needle body, the gap being used for accommodating a free end of a material tape; and

[0009] an adsorption structure arranged on the rolling needle body, the adsorption structure being used for adsorbing and fixing the free end to the rolling needle body so that the free end is located in the gap;

[0010] wherein the rolling needle body comprises:

[0011] a first half needle;

[0012] a second half needle, the first half needle and the second half needle both being provided with the adsorption structure.

[0013] When the needle insertion action is performed, first, the free end of the material belt can be accommodated in the gap, then the free end can be adsorbed and fixed to the needle body by the adsorption structure arranged on the needle body to make the free end located in the gap, and then the free end of the material belt in the gap can be prevented from sliding out of the gap, and thus the needle insertion action of the material belt is realized.

[0014] Based on this, when the needle is applied to a winding device for processing the winding core of a battery, the above-mentioned material belt can be understood as a diaphragm. Obviously, by adsorbing and fixing the free end of the diaphragm to the gap through the adsorption structure, the needle insertion action of the diaphragm can be realized.

[0015] It can be seen that when the adsorption structure is arranged on the needle body, the diaphragm can be fixed to the gap by adsorption and fixation, and then the needle insertion action of the diaphragm can be realized. Compared with the related art, the needle does not need to set a clamping structure in the gap, and the needle insertion action of the diaphragm can be realized by clamping the diaphragm in the gap through the clamping structure. Therefore, on the one hand, the structural complexity of the needle can be reduced, and thus the manufacturing cost of the needle can be reduced, thereby reducing the manufacturing cost of the entire winding device. On the other hand, there is no procedure for installing the clamping structure in the gap, and thus the installation difficulty of the needle can be reduced. On the other hand, since the clamping structure can be omitted, the overall volume of the needle can be further reduced. On the fourth aspect, when the diaphragm is clamped in the gap by the clamping structure, the clamping end of the clamping structure needs to be stretched back and forth to realize the clamping, which is slow. When the diaphragm is adsorbed and fixed in the gap by the adsorption structure, there is no problem of wasting time by stretching back and forth, and the speed is faster. Therefore, the needle insertion efficiency can be improved.

[0016] Optionally, the second half-needle and the first half-needle are arranged opposite to each other along a first direction to form the gap.

[0017] Optionally, the first half-needle comprises a first surface, and the second half-needle comprises a second surface, the second surface is arranged opposite to the first surface along the first direction to form the gap, and the first surface and the second surface are both provided with the adsorption structure.

[0018] Optionally, the adsorption structure comprises an adsorption hole.

[0019] Optionally, a plurality of adsorption holes are arranged on the first surface along the axial direction of the needle body, and / or a plurality of adsorption holes are arranged on the second surface along the axial direction of the needle body.

[0020] Optionally, the adsorption structure arranged on the first half-needle and the adsorption structure arranged on the second half-needle can independently adsorb and fix the free end.

[0021] In a second aspect, the present disclosure provides a winding device, comprising:

[0022] The winding needle according to any one of the first aspect, the winding needle body can wind the material tape from the upstream;

[0023] The slit entering mechanism comprises a cutting assembly and a pushing assembly, the cutting assembly comprises a cutting drive and a cutting knife, the cutting knife is connected to the cutting drive, the cutting drive is used to drive the cutting knife to move towards the direction close to the winding needle body to cut off the material tape to form the free end, the pushing assembly comprises a pushing drive and a pushing piece, the pushing piece is connected with the pushing drive, the pushing drive is used to drive the pushing piece to move towards the direction close to the winding needle body to extend into the slit to push the free end into the slit, and the winding needle body is used to wind the material tape on the outer peripheral wall of itself to form a winding core when rotating around the axis of itself.

[0024] Optionally, the winding device further comprises:

[0025] The first pressing assembly is located upstream of the slit entering mechanism, the first pressing assembly comprises a first pressing drive and a first over roller, the first pressing drive is used to drive the first over roller to move towards the direction close to or away from the winding needle body to make the first over roller press against or leave the outer peripheral wall of the winding needle body.

[0026] Optionally, the first over roller is a one-way rotating over roller, the first rotating tangent direction at the abutting position between the first over roller and the outer peripheral wall of the winding needle body is away from the upstream of the first over roller.

[0027] Optionally, the winding device further comprises:

[0028] The second pressing assembly is located downstream of the slit entering mechanism, the second pressing assembly comprises a second pressing drive and a second over roller, the second pressing drive is used to drive the second over roller to move towards the direction close to or away from the winding needle body to make the second over roller press against or leave the outer peripheral wall of the winding needle body.

[0029] Optionally, the second over roller is a one-way rotating over roller, the second rotating tangent direction at the abutting position between the second over roller and the outer peripheral wall of the winding needle body is away from the upstream of the second over roller.

[0030] Optionally, the cutting drive, the pushing drive and the first pressing drive are the same drive.

[0031] Compared with the related art, the present disclosure has the beneficial effects that:

[0032] In the present disclosure, when the needle insertion action is performed, first, the free end of the material belt can be accommodated in the gap, then the free end can be adsorbed and fixed to the needle body by the adsorption structure arranged on the needle body to make the free end located in the gap, and further, the free end of the material belt in the gap can be prevented from sliding out of the gap, and thus the needle insertion action of the material belt is realized.

[0033] Based on this, when the needle is applied to a winding device for processing the winding core of a battery, the above-mentioned material belt can be understood as a diaphragm. Obviously, by adsorbing and fixing the free end of the diaphragm to the gap through the adsorption structure, the needle insertion action of the diaphragm can be realized.

[0034] It can be seen that when the adsorption structure is arranged on the needle body, the diaphragm can be fixed to the gap by the adsorption fixing mode, and further, the needle insertion action of the diaphragm can be realized. Compared with the mode in the related art that the diaphragm needs to be clamped in the gap by the clamping structure arranged in the gap to realize the needle insertion action of the diaphragm, the needle does not need to arrange the clamping structure in the gap. Therefore, on the one hand, the structural complexity of the needle can be reduced, and further, the manufacturing cost of the needle can be reduced, so that the manufacturing cost of the entire winding device can be reduced. On the other hand, there is no procedure of installing the clamping structure in the gap, so that the installation difficulty of the needle can be reduced. On the other hand, since the clamping structure can be omitted, the overall volume of the needle can be further reduced. On the fourth aspect, when the diaphragm is clamped in the gap by the clamping structure, the clamping end of the clamping structure needs to be stretched back and forth to realize the needle insertion action, which is slow. When the diaphragm is adsorbed and fixed in the gap by the adsorption structure, there is no problem of wasting time by stretching back and forth, which is fast. Therefore, the needle insertion efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0036] FIG. 1 is a structural schematic view of a first needle according to an embodiment of the present disclosure;

[0037] FIG. 2 is a positional relationship diagram between the needle and the material belt in FIG. 1;

[0038] FIG. 3 is a structural schematic view of a second needle according to an embodiment of the present disclosure;

[0039] FIG. 4 is a bottom view of the first half needle in FIG. 2;

[0040] FIG. 5 is a top view of the second half needle in FIG. 2;

[0041] Fig. 6 is a structural schematic diagram of a first winding device according to an embodiment of the present disclosure;

[0042] Fig. 7 is a structural schematic diagram of the winding device in Fig. 1 when the free end enters the gap;

[0043] Fig. 8 is a structural schematic diagram of a second winding device according to an embodiment of the present disclosure;

[0044] Fig. 9 is a structural schematic diagram of a third winding device according to an embodiment of the present disclosure;

[0045] Fig. 10 is a structural schematic diagram of the winding device in Fig. 9 after the winding needle rotates counterclockwise around its own axis;

[0046] Fig. 11 is a structural schematic diagram of a fourth winding device according to an embodiment of the present disclosure.

[0047] Main figure mark explanation 1 - winding needle body; 11 - first half needle; 111 - first face; 112 - first suction hole; 12 - second half needle; 121 - second face; 122 - second suction hole; 2 - gap; 3 - suction structure; 4 - gap entering mechanism; 41 - cutting assembly; 411 - cutting driving member; 412 - cutting knife; 42 - pushing assembly; 421 - pushing driving member; 422 - pushing member; 5 - first pressing assembly; 51 - first pressing driving member; 52 - first passing roller; 6 - second pressing assembly; 61 - second pressing driving member; 62 - second passing roller; 7 - unwinding mechanism; 8 - turret; 100 - winding needle; 200 - winding device; F1 - first direction; F2 - first rotation tangent direction; F3 - second rotation tangent direction; L - material belt; L1 - free end; J - pole piece; W1 - winding station; W2 - discharging station. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present disclosure.

[0049] In the present disclosure, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used for better description of the present disclosure and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0050] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present disclosure can be understood according to the specific situation.

[0051] In addition, the terms "mounting", "setting", "provided with", "connected", "connected" should be understood broadly. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific situation.

[0052] In addition, the terms "first", "second", and the like are mainly used to distinguish different devices, elements or components (the specific types and structures can be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0053] The technical solutions of the present disclosure will be further described below in conjunction with specific embodiments and drawings.

[0054] The present disclosure provides a winding needle 100, as shown in FIG. 1 and FIG. 2, which comprises a winding needle body 1, a gap 2 and an adsorption structure 3, wherein the gap 2 is formed in the winding needle body 1, the gap 2 is used to accommodate the free end L1 of the material belt L, and the adsorption structure 3 is arranged on the winding needle body 1, and the adsorption structure 3 is used to adsorb and fix the free end L1 on the winding needle body 1 so that the free end L1 is located in the gap 2.

[0055] In the present embodiment, when the needle insertion action is performed, first, the free end L1 of the material belt L can be accommodated in the gap 2, then the free end L1 can be adsorbed and fixed on the winding needle body 1 by the adsorption structure 3 arranged on the winding needle body 1 so that the free end L1 is located in the gap 2, thereby avoiding the free end L1 of the material belt L in the gap 2 from sliding out of the gap 2, and thus the needle insertion action of the material belt L is realized.

[0056] Based on this, when the winding needle 100 is applied to the winding device 200 used for processing the winding core of the battery, the above-mentioned material belt L can be understood as a diaphragm. Obviously, by adsorbing the free end L1 of the diaphragm to the gap 2 through the adsorption structure 3, the needle insertion action of the diaphragm can be realized.

[0057] It can be seen that when the winding needle body 1 is provided with the adsorption structure 3, the diaphragm can be fixed to the gap 2 through the adsorption fixing mode, and then the needle insertion action of the diaphragm can be realized. Compared with the mode in the related art that the diaphragm is clamped in the gap through the clamping structure provided in the gap 2 to realize the needle insertion action of the diaphragm, the winding needle 100 does not need to be provided with the clamping structure in the gap 2. Therefore, on the one hand, the structural complexity of the winding needle 100 can be reduced, and then the manufacturing cost of the winding needle 100 can be reduced, so that the manufacturing cost of the entire winding device 200 can be reduced. On the other hand, there is no procedure of installing the clamping structure in the gap 2, so that the installation difficulty of the winding needle 100 can be reduced. On the other hand, since the clamping structure can be omitted, the overall volume of the winding needle 100 can be further reduced. On the fourth aspect, when the diaphragm is clamped in the gap 2 through the clamping structure, the clamping end of the clamping structure needs to be stretched back and forth to realize the needle insertion action, which is slow. When the diaphragm is adsorbed and fixed in the gap 2 through the adsorption structure 3, there is no problem of wasting time due to back and forth stretching, which is fast. Therefore, the needle insertion efficiency can be improved.

[0058] It should be noted that the above-mentioned understanding of the material belt L as a diaphragm is only a possible understanding of the material belt L in the scenario where the winding needle 100 is applied to process the winding core of the battery. Of course, when the winding needle 100 is applied to other scenarios, the above-mentioned material belt L can also be understood in other ways. For example, when the winding needle 100 is applied to the scenario of winding the adhesive tape, the above-mentioned material belt L can be understood as the adhesive tape. The present embodiment does not limit the material belt L.

[0059] The implementation mode of the above-mentioned adsorption structure 3 has multiple modes. In one possible implementation mode, when the material belt L is an iron material belt L, the adsorption structure 3 can be a magnet. Of course, the adsorption structure 3 can also be implemented in other possible ways. For example, in another possible implementation mode, referring to FIG. 1, the adsorption structure 3 includes an adsorption hole.

[0060] When the adsorption structure 3 is an adsorption hole, the purpose of adsorbing and fixing the free end L1 to the gap 2 can be achieved by providing negative pressure to the adsorption hole. The adsorption and fixing mode of the adsorption hole is mature in technology and low in cost. Therefore, the reliability of the operation of the adsorption structure 3 can be ensured to a certain extent, and the cost of the adsorption structure 3 can be reduced.

[0061] In the above-mentioned slit 2, there are also various implementation manners, in one possible implementation manner, as shown in FIG. 3, a groove extending along the axial direction (Z-axis direction in FIG. 3) of the winding needle body 1 can be arranged on the outer peripheral wall of the winding needle body 1, and the groove is the above-mentioned slit 2. In another possible implementation manner, as shown in FIG. 2, the winding needle body 1 includes a first half needle 11 and a second half needle 12, and the second half needle 12 is arranged opposite to the first half needle 11 along the first direction F1 to form the slit 2.

[0062] Since the second half needle 12 is arranged opposite to the first half needle 11 along the first direction F1, the slit 2 has openings at both ends along the radial direction of the winding needle body 1, so that when the free end L1 needs to be inserted into the slit 2, the free end L1 can be inserted into the slit 2 through any one of the openings at both ends along the radial direction of the winding needle body 1, and the way of inserting the free end L1 into the slit 2 is more and more flexible.

[0063] In some embodiments, as shown in FIG. 2, the first half needle 11 and the second half needle 12 are both provided with the adsorption structure 3.

[0064] By providing the first half needle 11 and the second half needle 12 with the adsorption structure 3, when the number of the material bands L is two and the number of the free ends L1 is two, one of the two free ends L1 can be adsorbed and fixed by the adsorption structure 3 on the first half needle 11, and the other of the two free ends L1 can be adsorbed and fixed by the adsorption structure 3 on the second half needle 12, that is, by providing the first half needle 11 and the second half needle 12 with the adsorption structure 3, two free ends L1 of two material bands L can be adsorbed and fixed at one time, and therefore the efficiency of inserting the needle is higher.

[0065] In order to make the adsorption structure 3 arranged on the first half needle 11 and the adsorption structure 3 arranged on the second half needle 12 respectively better adsorb and fix the two free ends L1 of the two material bands L, so that the two free ends L1 are better kept in the slit 2, in some embodiments, as shown in FIG. 2, the first half needle 11 includes a first surface 111, the second half needle 12 includes a second surface 121, the second surface 121 is arranged opposite to the first surface 111 along the first direction F1 to form the slit 2, and the first surface 111 and the second surface 121 are both provided with the adsorption structure 3.

[0066] Since the second face 121 is spaced apart from the first face 111 along the first direction F1 to form the gap 2, when the first face 111 and the second face 121 are both provided with the adsorption structure 3, the adsorption structure 3 provided on the first face 111 and the adsorption structure 3 provided on the second face 121 will be opposite along the first direction F1 and both face the gap 2, so when the adsorption structure 3 provided on the first face 111 adsorbs and fixes one of the two free ends L1, the force point of the adsorption force of the adsorption structure 3 on the free end L1 is just in the gap 2, so the free end L1 can be better adsorbed and fixed in the gap 2.

[0067] Similarly, when the adsorption structure 3 provided on the second face 121 adsorbs and fixes the other of the two free ends L1, the force point of the adsorption force of the adsorption structure 3 on the free end L1 is just in the gap 2, so the free end L1 can be better adsorbed and fixed in the gap 2.

[0068] Of course, in other embodiments, the adsorption structure 3 can also be provided at other positions of the first half needle 11 and the second half needle 12, such as can also be provided on the outer peripheral wall of the first half needle 11 and the second half needle 12, and the present embodiment is not limited to this.

[0069] In order to enable the two free ends L1 to be respectively more stably fixed on the first face 111 and the second face 121, in some embodiments, referring to FIG. 4 and FIG. 5, the number of adsorption holes provided on the first face 111 is a plurality, and the plurality of adsorption holes are arranged on the first face 111 along the axial direction (the Z-axis direction in FIG. 4) of the needle body 1; and / or, the number of adsorption holes provided on the second face 121 is a plurality, and the plurality of adsorption holes are arranged on the second face 121 along the axial direction (the Z-axis direction in FIG. 5) of the needle body 1.

[0070] By enabling the number of adsorption holes provided on the first face 111 to be a plurality, and enabling the plurality of adsorption holes to be arranged on the first face 111 along the axial direction of the needle body 1, it can be enabled that a plurality of positions of the free end L1 can be adsorbed and fixed with the first face 111, and in turn it can be enabled that the free end L1 can be more stably fixed on the first face 111.

[0071] Similarly, by enabling the number of adsorption holes provided on the second face 121 to be a plurality, and enabling the plurality of adsorption holes to be arranged on the second face 121 along the axial direction of the needle body 1, it can be enabled that a plurality of positions of the free end L1 can be adsorbed and fixed with the second face 121, and in turn it can be enabled that the free end L1 can be more stably fixed on the second face 121.

[0072] Further, referring to FIG. 4, the plurality of adsorption holes can also be arranged on the first face 111 along the radial direction (the X-axis direction in FIG. 4) of the needle body 1, so as to enable the free end L1 to be more stably fixed on the first face 111.

[0073] Similarly, referring to FIG. 5, the plurality of adsorption holes can also be arranged on the second surface 121 in the radial direction (X-axis direction in FIG. 5) of the winding needle body 1, so that the free end L1 can be more stably fixed on the second surface 121.

[0074] In some embodiments, referring to FIG. 2, the adsorption structure 3 arranged on the first half needle 11 and the adsorption structure 3 arranged on the second half needle 12 can each independently adsorb and fix the free end L1.

[0075] By allowing the adsorption structure 3 arranged on the first half needle 11 and the adsorption structure 3 arranged on the second half needle 12 to each independently adsorb and fix the free end L1, it can be freely decided according to the specific circumstances whether to adsorb and fix the free end L1 by the adsorption structure 3 of the first half needle 11 or by the adsorption structure 3 of the second half needle 12, which is very flexible.

[0076] Specifically, the above-mentioned implementation mode of the adsorption structure 3 arranged on the first half needle 11 and the adsorption structure 3 arranged on the second half needle 12 each independently adsorbing and fixing the free end L1 has multiple, under the premise that the adsorption structure 3 includes adsorption holes, in order to allow the adsorption holes arranged on the first half needle 11 and the adsorption holes arranged on the second half needle 12 to each independently adsorb and fix the free end L1, in one of the possible implementation modes, referring to FIG. 2, a first suction hole 112 can be arranged on the first half needle 11, and the first suction hole 112 is in communication with the adsorption holes arranged on the first half needle 11. In this way, by providing negative pressure to the first suction hole 112 alone, the purpose of allowing the adsorption holes arranged on the first half needle 11 to independently adsorb and fix the free end L1 can be achieved.

[0077] Similarly, a second suction hole 122 can be arranged on the second half needle 12, and the second suction hole 122 is in communication with the adsorption holes arranged on the second half needle 12. In this way, by providing negative pressure to the second suction hole 122 alone, the purpose of allowing the adsorption holes arranged on the second half needle 12 to independently adsorb and fix the free end L1 can be achieved.

[0078] The present disclosure also provides a winding device 200, as shown in FIGS. 6 and 7, which comprises the winding needle 100 and the entry gap mechanism 4, wherein the winding needle body 1 can wind the material tape L from the upstream, the entry gap mechanism 4 comprises a cutting assembly 41 and a pushing assembly 42, the cutting assembly 41 comprises a cutting driving member 411 and a cutting knife 412, the cutting knife 412 is connected to the cutting driving member 411, the cutting driving member 411 is used to drive the cutting knife 412 to move towards the winding needle body 1 to cut the material tape L to form a free end L1, the pushing assembly 42 comprises a pushing driving member 421 and a pushing member 422, the pushing member 422 is connected to the pushing driving member 421, the pushing driving member 421 is used to drive the pushing member 422 to move towards the winding needle body 1 to extend into the gap 2 to push the free end L1 into the gap 2 (as shown in FIG. 7), and the winding needle body 1 is used to wind the material tape L on the outer peripheral wall of the winding needle body 1 to form a winding core when rotating around the axis of the winding needle body 1.

[0079] The structure of the winding needle 100 can be the same as that of any one of the above-mentioned embodiments, and the same or similar beneficial effects can be achieved. For details, refer to the description of the winding needle 100 in the above-mentioned embodiments, which will not be repeated here.

[0080] In this embodiment, when the needle insertion action is performed, first, the cutting driving member 411 can drive the cutting knife 412 to move towards the winding needle body 1 to make the cutting knife 412 abut against the material tape L on the outer peripheral wall of the winding needle body 1 to cut the material tape L to form a free end L1, then the pushing driving member 421 can drive the pushing member 422 to move towards the winding needle body 1 to extend into the gap 2 until the free end L1 is pushed into the gap 2 by the pushing member 422.

[0081] After the free end L1 is pushed into the gap 2, the suction structure 3 arranged on the winding needle body 1 can be used to suction and fix the free end L1 on the winding needle body 1 to make the free end L1 located in the gap 2, thereby avoiding the free end L1 of the material tape L in the gap 2 from sliding out of the gap 2, thus achieving the needle insertion action of the material tape L.

[0082] After the needle insertion action of the material tape L is completed, the cutting driving member 411 can drive the cutting knife 412 to move away from the winding needle body 1, and the pushing driving member 421 can drive the pushing member 422 to move away from the winding needle body 1 to make the pushing member 422 leave the gap 2, and then the cutting knife 412 and the pushing member 422 both avoid the winding needle body 1, and then the winding needle body 1 can be rotated around the axis of the winding needle body 1, when the winding needle body 1 rotates around the axis of the winding needle body 1, the material tape L can be wound on the outer peripheral wall of the winding needle body 1 to form a winding core, thus achieving the purpose of making the winding core.

[0083] As can be seen from the above description, when the inserting mechanism 4 comprises the cutting assembly 41 and the pushing assembly 42, the free end L1 can be formed by the cutting assembly 41, and the free end L1 can be pushed into the gap 2 by the pushing assembly 42 so as to be adsorbed and fixed in the gap 2 by the adsorption structure 3 to realize the inserting work of the material belt L, that is, the automatic inserting work of the material belt L can be realized by the cooperation between the cutting assembly 41 and the pushing assembly 42, and the degree of automation is high.

[0084] In the embodiment, the cutting knife 412 can be a resistance wire cutting knife, and the pushing member 422 can be a plate-shaped structure.

[0085] In some embodiments, referring to FIG. 8, the winding device 200 further comprises a first pressing assembly 5 located upstream of the inserting mechanism 4, and the first pressing assembly 5 comprises a first pressing driving member 51 and a first passing roller 52. The first pressing driving member 51 is used to drive the first passing roller 52 to move towards the winding needle body 1 or away from the winding needle body 1, so that the first passing roller 52 presses against or leaves the outer peripheral wall of the winding needle body 1. The axial direction of the first passing roller 52 is parallel to the axial direction of the winding needle body 1.

[0086] Since the first pressing assembly 5 is located upstream of the inserting mechanism 4, when the first pressing driving member 51 drives the first passing roller 52 to move towards the winding needle body 1 and press against the outer peripheral wall of the winding needle body 1, the first passing roller 52 can press the material belt L against the outer peripheral wall of the winding needle body 1 upstream of the inserting mechanism 4. In this way, on the one hand, the first passing roller 52 can guide the transmission of the material belt L, and can avoid the material belt L from shaking greatly during the transmission, so that the material belt L can be transmitted more stably. On the other hand, the first passing roller 52 can also make the material belt L more flat, which provides convenience for subsequent cutting of the material belt L by the cutting assembly 41 to form the free end L1 and pushing of the free end L1 into the gap 2 by the pushing assembly 42.

[0087] In some embodiments, referring to FIG. 8, the cutting driving member 411, the pushing driving member 421 and the first pressing driving member 51 are the same driving member. When the cutting driving member 411, the pushing driving member 421 and the first pressing driving member 51 are the same driving member, the cutting knife 412, the pushing member 422 and the first passing roller 52 can share the same driving member. In this way, on the one hand, the cost of the winding device 200 can be reduced, and on the other hand, the structure of the winding device 200 can be relatively compact.

[0088] Of course, in other embodiments, the cutting driving member 411, the pushing driving member 421 and the first pressing driving member 51 can also be three different driving members, when the cutting driving member 411, the pushing driving member 421 and the first pressing driving member 51 are three different driving members, the cutting driving member 411, the pushing driving member 421 and the first pressing driving member 51 can respectively drive the cutting knife 412, the pushing member 422 and the first over roller 52 to move without affecting each other, thus being more flexible.

[0089] When the cutting driving member 411, the pushing driving member 421 and the first pressing driving member 51 are three different driving members, the cutting driving member 411, the pushing driving member 421 and the first pressing driving member 51 can all be air cylinders or electric cylinders, etc., which are not limited in the present embodiment.

[0090] When the cutting driving member 411, the pushing driving member 421 and the first pressing driving member 51 are the same driving member, the driving member can also be an air cylinder or an electric cylinder, etc., which is not limited in the present embodiment.

[0091] In order to better avoid the situation that the material belt L shakes greatly during conveying, and in order to make the cutting of the material belt L by the cutting assembly 41 to form the free end L1 and the pushing of the free end L1 into the gap 2 by the pushing assembly 42 more smooth and reliable, in some embodiments, referring to FIG. 9, the winding device 200 further comprises a second pressing assembly 6 located downstream of the entry gap mechanism 4, the second pressing assembly 6 comprising a second pressing driving member 61 and a second over roller 62, the second pressing driving member 61 being used to drive the second over roller 62 to move towards or away from the winding needle body 1, so that the second over roller 62 presses against or leaves the outer peripheral wall of the winding needle body 1, wherein the axial direction of the second over roller 62 is parallel to the axial direction of the winding needle body 1.

[0092] Since the second pressing assembly 6 is located downstream of the entry gap mechanism 4, when the second pressing driving member 61 drives the second over roller 62 to move towards the winding needle body 1 and press against the outer peripheral wall of the winding needle body 1, the second over roller 62 can press the material belt L against the outer peripheral wall of the winding needle body 1 downstream of the entry gap mechanism 4. In this way, in addition to guiding the material belt L upstream of the entry gap mechanism 4 by the first over roller 52, the material belt L can also be guided downstream of the entry gap mechanism 4 by the second over roller 62. Thus, on the one hand, the situation that the material belt L shakes greatly during conveying can be better avoided, and on the other hand, the cutting of the material belt L by the cutting assembly 41 to form the free end L1 and the pushing of the free end L1 into the gap 2 by the pushing assembly 42 can be more smooth and reliable.

[0093] The second pressing driving member 61 can be an air cylinder or an electric cylinder, etc., which is not limited in the present embodiment.

[0094] In some embodiments, referring to FIG. 9, the first roller 52 is a one-way rotating roller, and a first tangential direction F2 of the first roller 52 at a position where the first roller 52 abuts against the outer circumferential wall of the needle body 1 is away from an upstream of the first roller 52.

[0095] By making the first roller 52 a one-way rotating roller and making the first tangential direction F2 of the first roller 52 at the position where the first roller 52 abuts against the outer circumferential wall of the needle body 1 away from the upstream of the first roller 52, the first roller 52 will allow the material belt L to be conveyed downstream and prevent the material belt L from being conveyed upstream, so that the situation that the free end L1 of the material belt L slides out of the gap 2 due to the tension from the upstream of the first roller 52 can be avoided.

[0096] Referring to FIG. 10, when the winding device 200 is applied in a scenario of processing a winding core of a battery, the material belt L can be understood as two layers of separators, and it can be understood that a pole piece J needs to be inserted between the two layers of separators to make the winding core of the battery. In order to insert the pole piece J between the two layers of separators, under the premise that the pushing member 422 and the cutter 412 both avoid the needle body 1, the first roller 52 and the second roller 62 all abut against the outer circumferential wall of the needle body 1, first, the needle body 1 can be made to rotate about its own axis (FIG. 10 is a state after the needle body 1 in FIG. 9 rotates counterclockwise), until the gap 2 passes the second roller 62, so that the first roller 52 and the second roller 62 are both located upstream of the gap 2. At this time, in order to facilitate the insertion of the pole piece J between the two layers of separators, the first roller 52 can be made to move away from the outer circumferential wall of the needle body 1 in a direction away from the needle body 1. In this way, the first roller 52 can leave space for the insertion of the pole piece J between the two layers of separators.

[0097] Since the first roller 52 moves away from the outer circumferential wall of the needle body 1 in the direction away from the needle body 1 after that, only the second roller 62 continues to abut against the outer circumferential wall of the needle body 1. In order to avoid the situation that the free end L1 of the material belt L slides out of the gap 2 due to the tension from the upstream of the second roller 62 after the first roller 52 leaves the outer circumferential wall of the needle body 1, in some embodiments, referring to FIG. 10, the second roller 62 is a one-way rotating roller, and a second tangential direction F3 of the second roller 62 at a position where the second roller 62 abuts against the outer circumferential wall of the needle body 1 is away from an upstream of the second roller 62.

[0098] By making the second roller 62 a one-way rotating roller and making the second tangential direction F3 of the second roller 62 at the position where the second roller 62 abuts against the outer circumferential wall of the needle body 1 away from the upstream of the second roller 62, the second roller 62 will allow the material belt L to be conveyed downstream and prevent the material belt L from being conveyed upstream, so that the situation that the free end L1 of the material belt L slides out of the gap 2 due to the tension from the upstream of the second roller 62 can be avoided.

[0099] In some embodiments, referring to FIG. 11, the winding device 200 has a winding station W1 and a discharging station W2, and further comprises a winding mechanism 7 and a turret 8. The turret 8 is rotatably arranged, and the winding needles 100 are rotatably arranged in the turret 8. The entry gap mechanism 4 is arranged corresponding to the winding station W1. The winding mechanism 7 is used to feed the ribbon L to the winding needle 100 located at the winding station W1. The cutting assembly 41 is used to cut the ribbon L. The pushing assembly 42 is used to push the free end L1 of the cut ribbon L into the gap 2. Then, the free end L1 can be adsorbed and fixed to the gap 2 by the adsorption structure 3 arranged on the winding needle body 1, so that the free end L1 is fixed, thereby avoiding the free end L1 of the ribbon L in the gap 2 from sliding out of the gap 2. Thus, the needle insertion action of the ribbon L is realized.

[0100] The winding needle 100 of the winding station W1 is used to wind the ribbon L on the outer periphery of the winding needle 100 when rotating. The turret 8 is used to rotate the winding needle 100 located at the winding station W1 to the discharging station W2 and rotate the winding needle 100 located at the discharging station W2 to the winding station W1 when rotating.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, and not to limit them. Although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacements to some or all of the technical features. Such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A winding needle (100) comprising: a winding needle body (1) ; a gap (2) formed in the winding needle body (1), the gap (2) being configured to accommodate a free end (L1) of a tape (L) ; and an adsorption structure (3) provided on the winding needle body (1), the adsorption structure (3) being configured to adsorb and fix the free end (L1) to the winding needle body (1) so that the free end (L1) is located in the gap (2). The winding needle body (1) comprises: a first half needle (11) ; a second half needle (12), the first half needle (11) and the second half needle (12) are both provided with the adsorption structure (3).

2. The reel pin (100) of claim 1, wherein, The second half needle (12) and the first half needle (11) are spaced apart and opposite in a first direction (F1) to form the gap (2).

3. The pin (100) according to claim 2, wherein The first half needle (11) comprises a first face (111), and the second half needle (12) comprises a second face (121), the second face (121) and the first face (111) are spaced apart and opposite in the first direction (F1) to form the gap (2), and the first face (111) and the second face (121) are both provided with the adsorption structure (3).

4. The pin (100) according to claim 3, wherein The adsorption structure (3) comprises an adsorption hole.

5. The pin (100) according to claim 4, wherein The number of adsorption holes provided on the first face (111) is multiple, and multiple adsorption holes are arranged on the first face (111) in the axial direction of the winding needle body (1) ; and / or the number of adsorption holes provided on the second face (121) is multiple, and multiple adsorption holes are arranged on the second face (121) in the axial direction of the winding needle body (1).

6. The spool pin (100) according to any one of claims 3-5, wherein, The adsorption structure (3) provided on the first half needle (11) and the adsorption structure (3) provided on the second half needle (12) can independently adsorb and fix the free end (L1). 7.A winding device (200) comprising: the winding needle (100) of any one of claims 1-6, the winding needle body (1) can wind the tape (L) from upstream. The slit-entering mechanism (4) comprises a cutting assembly (41) and a pushing assembly (42). The cutting assembly (41) comprises a cutting driving member (411) and a cutting knife (412). The cutting knife (412) is connected to the cutting driving member (411). The cutting driving member (411) is used to drive the cutting knife (412) to move towards the direction close to the winding needle body (1) to cut the material belt (L) to form the free end (L1). The pushing assembly (42) comprises a pushing driving member (421) and a pushing member (422). The pushing member (422) is connected to the pushing driving member (421). The pushing driving member (421) is used to drive the pushing member (422) to move towards the direction close to the winding needle body (1) to extend into the slit (2) to push the free end (L1) into the slit (2). The winding needle body (1) is used to wind the material belt (L) on the outer peripheral wall thereof to form a winding core when rotating around the axis thereof.

8. The winding apparatus (200) according to claim 7, wherein The winding device (200) further comprises: A first pressing assembly (5) located upstream of the slit-entering mechanism (4). The first pressing assembly (5) comprises a first pressing driving member (51) and a first over roller (52). The first pressing driving member (51) is used to drive the first over roller (52) to move towards the direction close to or away from the winding needle body (1) to press against or leave the outer peripheral wall of the winding needle body (1).

9. The winding apparatus (200) according to claim 8, wherein The first over roller (52) is a one-way rotating over roller. The first rotating tangent direction (F2) at the abutting position between the first over roller (52) and the outer peripheral wall of the winding needle body (1) is away from the upstream of the first over roller (52).

10. The winding apparatus (200) according to claim 7, wherein The winding device (200) further comprises: A second pressing assembly (6) located downstream of the slit-entering mechanism (4). The second pressing assembly (6) comprises a second pressing driving member (61) and a second over roller (62). The second pressing driving member (61) is used to drive the second over roller (62) to move towards the direction close to or away from the winding needle body (1) to press against or leave the outer peripheral wall of the winding needle body (1).

11. The winding apparatus (200) according to claim 10, wherein The second over roller (62) is a one-way rotating over roller. The second rotating tangent direction (F3) at the abutting position between the second over roller (62) and the outer peripheral wall of the winding needle body (1) is away from the upstream of the second over roller (62).

12. The winding apparatus (200) according to claim 8, wherein, The cutting driving member (411), the pushing driving member (421) and the first pressing driving member (51) are the same driving member.

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