Winding needle and winding equipment

Abstract

The utility model relates to the technical field of battery processing equipment, in particular to a winding needle and winding equipment. The winding needle comprises a winding needle body; the gap is formed in the winding needle body, and the gap is used for containing the free end of the material belt; and the adsorption structure is arranged on the winding needle body, and the adsorption structure is used for adsorbing and fixing the free end to the winding needle body so that the free end can be located in the gap. According to the winding needle provided by the invention, on one hand, the manufacturing cost of the whole winding equipment can be reduced, and on the other hand, the procedure of installing the clamping structure in the gap does not exist, so that the installation difficulty of the winding needle can be reduced. In addition, due to the fact that a clamping structure can be omitted, the overall size of the winding needle can be further reduced. And fourthly, the needle inserting efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery processing equipment, and in particular, to a winding needle and a winding device. Background Art

[0002] A winding device is a device for processing battery cores. Specifically, a winding device generally includes a winding needle. When processing a core through the winding device, first, a separator needs to be inserted into the gap of the winding needle, and then, the separator needs to be clamped in the gap through a clamping structure arranged in the gap to achieve the separator needle-inserting action. Finally, the winding needle needs to be rotated to achieve the purpose of processing the core.

[0003] However, when the separator needle-inserting action is achieved by clamping through the clamping structure, on the one hand, since the structure of the clamping structure is relatively complex, the manufacturing cost of the winding device will be increased. On the other hand, since the clamping structure needs to be installed in the gap, the installation difficulty of the winding needle is relatively large. Utility Model Content

[0004] The present application discloses a winding needle and a winding device, which can reduce the manufacturing cost of the winding device, can also reduce the installation difficulty of the winding needle, and improve the needle-inserting efficiency.

[0005] To achieve the above object, in a first aspect, the present application discloses a winding needle, including:

[0006] A winding needle body;

[0007] A gap, which is formed in the winding needle body and is used for accommodating the free end of a material tape; and,

[0008] An adsorption structure, which is arranged on the winding needle body and is used for adsorbing and fixing the free end to the winding needle body so that the free end is located in the gap.

[0009] When performing the needle-inserting action, first, the free end of the material tape can be accommodated in the gap, and then, the free end can be adsorbed and fixed to the winding needle body through the adsorption structure arranged on the winding needle body so that the free end is located in the gap, thereby avoiding the free end of the material tape in the gap from slipping out of the gap. Thus, the needle-inserting action of the material tape is achieved.

[0010] Based on this, when the winding needle is applied to a winding device for processing a battery core, the above-mentioned material tape can be understood as a separator. Obviously, by adsorbing and fixing the free end of the separator to the gap through the adsorption structure, the separator needle-inserting action can be achieved.

[0011] It can be seen that when an adsorption structure is provided on the bobbin body, the separator can be fixed in the gap by adsorption fixation, and then the pin insertion action of the separator can be realized. Compared with the related art in which a clamping structure needs to be provided in the gap and the separator can be clamped in the gap by the clamping structure to realize the pin insertion action of the separator, the bobbin does not need to be provided with a clamping structure in the gap. Therefore, on the one hand, the structural complexity of the bobbin can be reduced, and then the manufacturing cost of the bobbin can be reduced, so that the manufacturing cost of the entire winding device can be reduced. On the other hand, there is no procedure for installing the clamping structure in the gap, so the installation difficulty of the bobbin can be reduced. On the other hand, since the clamping structure can be omitted, the overall volume of the bobbin can be further reduced. Fourthly, when the separator is clamped in the gap by the clamping structure, the clamping end of the clamping structure needs to stretch back and forth to achieve the action, and the speed is slow. When the separator 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 fast. Therefore, the pin insertion efficiency can be improved.

[0012] Optionally, the bobbin body includes:

[0013] A first half-bobbin; and,

[0014] A second half-bobbin, the second half-bobbin and the first half-bobbin are arranged oppositely at intervals along a first direction to form the gap.

[0015] Optionally, the first half-bobbin includes a first surface, the second half-bobbin includes a second surface, the second surface and the first surface are arranged oppositely at intervals along the first direction to form the gap, and the adsorption structure is provided on both the first surface and the second surface.

[0016] Optionally, the adsorption structure includes adsorption holes.

[0017] Optionally, the number of the adsorption holes provided on the first surface is multiple, and the multiple adsorption holes are arranged on the first surface along the axial direction of the bobbin body; and / or, the number of the adsorption holes provided on the second surface is multiple, and the multiple adsorption holes are arranged on the second surface along the axial direction of the bobbin body.

[0018] Optionally, the adsorption structure provided on the first half-bobbin and the adsorption structure provided on the second half-bobbin can independently adsorb and fix the free end.

[0019] In a second aspect, the present application discloses a winding device, including:

[0020] The bobbin according to any one of the first aspects above, and the bobbin body can wind the tape from the upstream;

[0021] The sewing-in mechanism, the sewing-in mechanism includes a cutting assembly and a pushing assembly, the cutting assembly includes a cutting driving member and a cutter, the cutter is connected to the cutting driving member, the cutting driving member is used to drive the cutter to move towards the direction close to the bobbin body to cut off the strip to form the free end, the pushing assembly includes a pushing driving member and a pusher, the pusher is connected to the pushing driving member, the pushing driving member is used to drive the pusher to move towards the direction close to the bobbin body and extend into the gap to push the free end into the gap, and the bobbin body is used to wind the strip around its outer peripheral wall to form a bobbin core when rotating around its own axis.

[0022] Optionally, the winding device further includes:

[0023] The first pressing assembly, the first pressing assembly is located upstream of the sewing-in mechanism, the first pressing assembly includes a first pressing driving member and a first roller, the first pressing driving member is used to drive the first roller to move towards or away from the direction of the bobbin body to make the first roller press against or leave the outer peripheral wall of the bobbin body.

[0024] Optionally, the first roller is a one-way rotating roller, and the first rotation tangent direction at the contact position between the first roller and the outer peripheral wall of the bobbin body deviates from the upstream of the first roller.

[0025] Optionally, the winding device further includes:

[0026] The second pressing assembly, the second pressing assembly is located downstream of the sewing-in mechanism, the second pressing assembly includes a second pressing driving member and a second roller, the second pressing driving member is used to drive the second roller to move towards or away from the direction of the bobbin body to make the second roller press against or leave the outer peripheral wall of the bobbin body.

[0027] Optionally, the second roller is a one-way rotating roller, and the second rotation tangent direction at the contact position between the second roller and the outer peripheral wall of the bobbin body deviates from the upstream of the second roller.

[0028] Optionally, the cutting driving member, the pushing driving member and the first pressing driving member are the same driving member.

[0029] Compared with the prior art, the beneficial effect of the present application lies in:

[0030] In the present application, when performing the needle inserting action, first, the free end of the strip can be placed in the gap, and then, the free end can be adsorbed and fixed on the bobbin body by the adsorption structure provided on the bobbin body so that the free end is located in the gap, thereby avoiding the free end of the strip in the gap from slipping out of the gap. Thus, the needle inserting action of the strip is realized.

[0031] Based on this, when the winding needle is applied to a winding device for processing the battery core, the above-mentioned tape can be understood as a separator. Obviously, by adsorbing and fixing the free end of the separator to the gap through the adsorption structure, the pinning action of the separator can be achieved.

[0032] It can be seen that when the adsorption structure is provided on the winding needle body, the separator can be fixed to the gap by adsorption and fixation, and then the pinning action of the separator can be achieved. Compared with the related technology in which a clamping structure needs to be provided in the gap and the separator can be pinned by clamping the separator in the gap through the clamping structure, this winding needle does not need to provide a clamping structure in the gap. Therefore, on the one hand, the structural complexity of the winding needle can be reduced, and then the manufacturing cost of the winding 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 for installing the clamping structure in the gap, so the installation difficulty of the winding needle can be reduced. On the other hand, since the clamping structure can be omitted, the overall volume of the winding needle can be further reduced. Fourthly, when the separator is clamped in the gap by the clamping structure, the clamping end of the clamping structure needs to stretch back and forth to achieve the action, and the speed is slow. When the separator is adsorbed and fixed in the gap by the adsorption structure, there is no problem of wasting time due to stretching back and forth, and the speed is fast. Therefore, the pinning efficiency can be improved. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1 is a schematic structural diagram of the first winding needle shown in the embodiment of the present application;

[0035] Figure 2 is Figure 1 the positional relationship diagram between the winding needle and the tape in

[0036] Figure 3 is a schematic structural diagram of the second winding needle shown in the embodiment of the present application;

[0037] Figure 4 is Figure 2 the bottom view of the first half needle in

[0038] Figure 5 is Figure 2 the top view of the second half needle in

[0039] Figure 6It is a schematic structural diagram of the first winding device shown in the embodiments of the present application;

[0040] Figure 7 is Figure 1 a schematic structural diagram of the winding device in when the free end enters the gap;

[0041] Figure 8 It is a schematic structural diagram of the second winding device shown in the embodiments of the present application;

[0042] Figure 9 It is a schematic structural diagram of the third winding device shown in the embodiments of the present application;

[0043] Figure 10 is Figure 9 a schematic structural diagram of the winding device in after the winding needle rotates counterclockwise around its own axis;

[0044] Figure 11 It is a schematic structural diagram of the fourth winding device shown in the embodiments of the present application.

[0045] Main reference numeral description

[0046] 1 - Winding needle body; 11 - First half needle; 111 - First surface; 112 - First suction hole; 12 - Second half needle; 121 - Second surface; 122 - Second suction hole;

[0047] 2 - Gap;

[0048] 3 - Adsorption structure;

[0049] 4 - In - slit mechanism; 41 - Cutting assembly; 411 - Cutting driving part; 412 - Cutter; 42 - Pushing assembly; 421 - Pushing driving part; 422 - Pushing piece;

[0050] 5 - First pressing assembly; 51 - First pressing driving part; 52 - First idler roller;

[0051] 6 - Second pressing assembly; 61 - Second pressing driving part; 62 - Second idler roller;

[0052] 7 - Unwinding mechanism;

[0053] 8 - Turret;

[0054] 100 - Winding needle; 200 - Winding device;

[0055] F1 - First direction; F2 - First rotation tangent direction; F3 - Second rotation tangent direction; L - Tape; L1 - Free end; J - Pole piece; W1 - Winding station; W2 - Unloading station. Detailed implementation manners

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0057] In the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0058] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific situations.

[0059] In addition, the terms "mount", "set", "provided with", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0060] In addition, terms such as "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may 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 specified, the meaning of "plurality" is two or more.

[0061] The following will further illustrate the technical solutions of the present application in conjunction with specific embodiments and the accompanying drawings.

[0062] The present application provides a coiling needle 100, see Figure 1 and Figure 2, the winding pin 100 includes: a winding pin body 1, a gap 2, and an adsorption structure 3. Among them, the gap 2 is formed in the winding pin body 1. The gap 2 is used to accommodate the free end L1 of the tape L. The adsorption structure 3 is arranged on the winding pin body 1. The adsorption structure 3 is used to adsorb and fix the free end L1 to the winding pin body 1 so that the free end L1 is located in the gap 2.

[0063] In this embodiment, when performing the pin insertion operation, first, the free end L1 of the tape L can be placed in the gap 2. Then, the free end L1 can be adsorbed and fixed to the winding pin body 1 by the adsorption structure 3 arranged on the winding pin body 1 so that the free end L1 is located in the gap 2. Furthermore, the free end L1 of the tape L in the gap 2 can be prevented from slipping out of the gap 2. Thus, the pin insertion operation of the tape L is realized.

[0064] Based on this, when the winding pin 100 is applied to the winding device 200, and the winding device 200 is used for processing the battery core, the above-mentioned tape L can be understood as a separator. Obviously, by adsorbing and fixing the free end L1 of the separator to the gap 2 through the adsorption structure 3, the pin insertion operation of the separator can be realized.

[0065] It can be seen that when the adsorption structure 3 is arranged on the winding pin body 1, the separator can be fixed to the gap 2 by the adsorption and fixing method, and thus the pin insertion operation of the separator can be realized. Compared with the related technology in which a clamping structure needs to be arranged in the gap 2 and the separator can be clamped in the gap by the clamping structure to realize the pin insertion operation of the separator, the winding pin 100 does not need to arrange a clamping structure in the gap 2. Therefore, on the one hand, the structural complexity of the winding pin 100 can be reduced, and then the manufacturing cost of the winding pin 100 can be reduced, thereby reducing the manufacturing cost of the entire winding device 200. On the other hand, there is no procedure for installing the clamping structure in the gap 2. Therefore, the installation difficulty of the winding pin 100 can be reduced. On the further hand, since the clamping structure can be omitted, the overall volume of the winding pin 100 can be further reduced. Fourthly, when the separator is clamped in the gap 2 by the clamping structure, the clamping end of the clamping structure needs to move back and forth to achieve it, and the speed is slow. While when the separator is adsorbed and fixed in the gap 2 by the adsorption structure 3, there is no problem of wasting time due to back-and-forth movement, and the speed is fast. Therefore, the pin insertion efficiency can be improved.

[0066] It should be noted that the understanding of the above-mentioned tape L as a separator is only a possible understanding of the tape L in the scenario where the winding pin 100 is applied to the processing of the battery core in this embodiment. Of course, when the winding pin 100 is applied to other scenarios, the above-mentioned tape L can also be understood in other ways. For example, when the winding pin 100 is applied to the scenario of winding a tape, the above-mentioned tape L can be understood as a tape. The tape L in the embodiments of the present application is not limited.

[0067] There are multiple ways to implement the above-mentioned adsorption structure 3. In one possible implementation, when the tape L is an iron tape 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, see Figure 1 , the adsorption structure 3 includes adsorption holes.

[0068] 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 a negative pressure to the adsorption hole. The method of adsorbing and fixing by adsorption holes is technically mature and low-cost. Therefore, to a certain extent, the reliability of the operation of the adsorption structure 3 can be ensured and the cost of the adsorption structure 3 can be reduced.

[0069] Among them, there are also multiple ways to implement the above-mentioned gap 2. In one possible implementation, see Figure 3 , a groove extending along the axial direction of the winding needle body 1 ( Figure 3 the Z-axis direction in Figure 2 ) can be provided on the outer peripheral wall of the winding needle body 1, and this groove is the above-mentioned gap 2. In another possible implementation, see

[0070] Since the second half-needle 12 and the first half-needle 11 are arranged at intervals in the first direction F1, both ends of the gap 2 in the radial direction of the winding needle body 1 will have openings. In this way, when the free end L1 needs to be inserted into the gap 2, it can be inserted into the gap 2 through any one of the openings at both ends of the gap 2 in the radial direction of the winding needle body 1. There are more ways to insert the free end L1 into the gap 2, which is more flexible.

[0071] In some embodiments, see Figure 2 , both the first half-needle 11 and the second half-needle 12 are provided with the adsorption structure 3.

[0072] By providing the adsorption structure 3 on both the first half-needle 11 and the second half-needle 12, when the number of tapes L is two and the number of 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 adsorption structure 3 on both the first half-needle 11 and the second half-needle 12, the two free ends L1 of the two tapes L can be adsorbed and fixed at one time. Therefore, the pin insertion efficiency is higher.

[0073] In order to enable the adsorption structures 3 provided on the first half-needle 11 and the adsorption structures 3 provided on the second half-needle 12 to better adsorb and fix the two free ends L1 of the two strip materials L respectively, so that the two free ends L1 are better held in the gap 2. In some embodiments, refer to Figure 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 and the first surface 111 are spaced opposite to each other along the first direction F1 to form the gap 2, and the adsorption structures 3 are provided on both the first surface 111 and the second surface 121.

[0074] Since the second surface 121 and the first surface 111 are spaced opposite to each other along the first direction F1 to form the gap 2, therefore, when the adsorption structures 3 are provided on both the first surface 111 and the second surface 121, the adsorption structure 3 provided on the first surface 111 and the adsorption structure 3 provided on the second surface 121 will be opposite to each other along the first direction F1 and both face into the gap 2. In this way, when the adsorption structure 3 provided on the first surface 111 adsorbs and fixes one of the two free ends L1, the force application point where the adsorption structure 3 exerts an adsorption force on the free end L1 is just in the gap 2. Therefore, the free end L1 can be better adsorbed and fixed in the gap 2.

[0075] Similarly, when the adsorption structure 3 provided on the second surface 121 adsorbs and fixes the other of the two free ends L1, the force application point where the adsorption structure 3 exerts an adsorption force on the free end L1 is just in the gap 2. Therefore, the free end L1 can be better adsorbed and fixed in the gap 2.

[0076] 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. For example, it can also be provided on the outer peripheral walls of the first half-needle 11 and the second half-needle 12, and this embodiment does not limit this.

[0077] In order to enable the two free ends L1 to be more stably fixed to the first surface 111 and the second surface 121 respectively. In some embodiments, refer to Figure 4 and Figure 5 , the number of adsorption holes provided on the first surface 111 is multiple, and the multiple adsorption holes are arranged on the first surface 111 along the axial direction of the coiling needle body 1 ( Figure 4 the Z-axis direction in Figure 5 ); and / or, the number of adsorption holes provided on the second surface 121 is multiple, and the multiple adsorption holes are arranged on the second surface 121 along the axial direction of the coiling needle body 1 (

[0078] By making the number of adsorption holes provided on the first surface 111 be multiple, and arranging the multiple adsorption holes along the axial direction of the coiling needle body 1 on the first surface 111, it is possible to make multiple positions of the free end L1 be adsorbed and fixed to the first surface 111, and thus the free end L1 can be fixed to the first surface 111 more stably.

[0079] Similarly, by making the number of adsorption holes provided on the second surface 121 be multiple, and arranging the multiple adsorption holes along the axial direction of the coiling needle body 1 on the second surface 121, it is possible to make multiple positions of the free end L1 be adsorbed and fixed to the second surface 121, and thus the free end L1 can be fixed to the second surface 121 more stably.

[0080] Furthermore, referring to Figure 4 , the multiple adsorption holes can also be arranged along the radial direction of the coiling needle body 1 ( Figure 4 X-axis direction in

[0081] Similarly, referring to Figure 5 ), the multiple adsorption holes can also be arranged along the radial direction of the coiling needle body 1 ( Figure 5 X-axis direction in

[0082] In some embodiments, referring to Figure 2 , the adsorption structure 3 provided on the first half-needle 11 and the adsorption structure 3 provided on the second half-needle 12 can each independently adsorb and fix the free end L1.

[0083] By making the adsorption structure 3 provided on the first half-needle 11 and the adsorption structure 3 provided on the second half-needle 12 be able to each independently adsorb and fix the free end L1, it is possible to freely decide whether to adsorb and fix the free end L1 through the adsorption structure 3 of the first half-needle 11 or through the adsorption structure 3 of the second half-needle 12 according to the specific situation, which is very flexible.

[0084] Specifically, there are multiple implementation manners for the above-mentioned adsorption structure 3 provided on the first half-needle 11 and the adsorption structure 3 provided on the second half-needle 12 to each independently adsorb and fix the free end L1. On the premise that the adsorption structure 3 includes adsorption holes, in order to make the adsorption holes provided on the first half-needle 11 and the adsorption holes provided on the second half-needle 12 be able to each independently adsorb and fix the free end L1, in one possible implementation manner, referring to Figure 2, a first suction hole 112 can be provided on the first half-needle 11, and the first suction hole 112 communicates with the adsorption hole provided on the first half-needle 11. In this way, by separately providing negative pressure to the first suction hole 112, the purpose of enabling the adsorption hole provided on the first half-needle 11 to independently adsorb and fix the free end L1 can be achieved.

[0085] Similarly, a second suction hole 122 can be provided on the second half-needle 12, and the second suction hole 122 communicates with the adsorption hole provided on the second half-needle 12. In this way, by separately providing negative pressure to the second suction hole 122, the purpose of enabling the adsorption hole provided on the second half-needle 12 to independently adsorb and fix the free end L1 can be achieved.

[0086] This application also provides a winding device 200. Refer to Figure 6 and Figure 7 , the winding device 200 includes: a winding needle 100 and a sewing-in mechanism 4. Among them, the winding needle body 1 can wind the strip L from the upstream, and the sewing-in mechanism 4 includes a cutting assembly 41 and a pushing assembly 42. The cutting assembly 41 includes a cutting driving member 411 and a cutter 412. The cutter 412 is connected to the cutting driving member 411, and the cutting driving member 411 is used to drive the cutter 412 to move towards the winding needle body 1 to cut off the strip L to form a free end L1. The pushing assembly 42 includes a pushing driving member 421 and a pusher 422. The pusher 422 is connected to the pushing driving member 421, and the pushing driving member 421 is used to drive the pusher 422 to move towards the winding needle body 1 and extend into the gap 2 to push the free end L1 into the gap 2 ( Figure 7 in the state shown in the figure), and the winding needle body 1 is used to wind the strip L around its outer peripheral wall to form a core when rotating around its own axis.

[0087] Among them, the structure of the winding needle 100 can be the same as the structure of the winding needle 100 described in any of the above embodiments, and can bring the same or similar beneficial effects. For details, reference can be made to the description of the winding needle 100 in the above embodiments, and this embodiment will not be elaborated here.

[0088] In this embodiment, when performing the needle insertion action, first, the cutting driving member 411 can be used to drive the cutter 412 to move towards the winding needle body 1, so that the cutter 412 abuts against the strip L on the outer peripheral wall of the winding needle body 1 to cut off the strip L to form a free end L1. Then, the pushing driving member 421 can drive the pusher 422 to move towards the winding needle body 1 and extend into the gap 2 until the free end L1 is pushed into the gap 2 by the pusher 422.

[0089] After the free end L1 is pushed into the slit 2, the free end L1 can be adsorbed and fixed to the coiling needle body 1 by the adsorption structure 3 provided on the coiling needle body 1 so that the free end L1 is located within the slit 2, thereby preventing the free end L1 of the tape L within the slit 2 from slipping out of the slit 2. Thus, the needle inserting operation of the tape L is achieved.

[0090] After the needle inserting operation of the tape L is completed, the cutting driving member 411 can drive the cutter 412 to move away from the coiling needle body 1, and the pushing driving member 421 can drive the pusher 422 to move away from the coiling needle body 1 so that the pusher 422 leaves the slit 2, thereby enabling both the cutter 412 and the pusher 422 to avoid the coiling needle body 1. After both the cutter 412 and the pusher 422 avoid the coiling needle body 1, the coiling needle body 1 can be rotated about its own axis. When the coiling needle body 1 rotates about its own axis, the tape L can be wound around the outer peripheral wall of the coiling needle body 1 to form a core. Thus, the purpose of manufacturing the core is achieved.

[0091] As can be seen from the above description, when the slit inserting mechanism 4 includes a cutting assembly 41 and a pushing assembly 42, the tape L can be cut by the cutting assembly 41 to form a free end L1, and the free end L1 can be pushed into the slit 2 by the pushing assembly 42 so that the free end L1 can be adsorbed and fixed within the slit 2 by the adsorption structure 3 subsequently to achieve the needle inserting work of the tape L. That is to say, through the cooperation between the cutting assembly 41 and the pushing assembly 42, the automatic needle inserting work of the tape L can be achieved, and the degree of automation is high.

[0092] Among them, the above cutter 412 can be a resistance wire cutter. Of course, the cutter 412 can also be other possible cutters, and this embodiment does not limit this. The above pusher 422 can be a plate-like structure. Of course, the pusher 422 can also be other possible structures, and this embodiment does not limit this.

[0093] In some embodiments, referring to Figure 8 , the winding device 200 further includes: a first pressing assembly 5. The first pressing assembly 5 is located upstream of the slit inserting mechanism 4. The first pressing assembly 5 includes a first pressing driving member 51 and a first idler roller 52. The first pressing driving member 51 is used to drive the first idler roller 52 to move toward or away from the coiling needle body 1 so that the first idler roller 52 presses against or leaves the outer peripheral wall of the coiling needle body 1. Among them, the axial direction of the first idler roller 52 is parallel to the axial direction of the coiling needle body 1.

[0094] Since the first pressing component 5 is located upstream of the slotting mechanism 4, when the first pressing driving member 51 drives the first roller 52 to move towards the needle body 1 until it presses against the outer peripheral wall of the needle body 1, the first roller 52 can press the strip L against the outer peripheral wall of the needle body 1 upstream of the slotting mechanism 4. In this way, on the one hand, the transmission of the strip L by the first roller 52 can play a guiding role, avoiding the situation of large fluctuations of the strip L during transmission, so that the strip L can be transmitted more smoothly. On the other hand, the strip L can be made relatively flat by the first roller 52, facilitating the subsequent cutting of the strip L by the cutting component 41 to form a free end L1 and pushing the free end L1 into the gap 2 by the pushing component 42.

[0095] In some embodiments, referring to Figure 8 , the above-mentioned cutting driving member 411, pushing driving member 421 and first pressing driving member 51 are the same driving member. When the cutting driving member 411, pushing driving member 421 and first pressing driving member 51 are the same driving member, the cutter 412, pusher 422 and first roller 52 can share the same driving member. With this setting, 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 made relatively compact.

[0096] Of course, in other embodiments, the cutting driving member 411, pushing driving member 421 and first pressing driving member 51 can also be three different driving members. When the cutting driving member 411, pushing driving member 421 and first pressing driving member 51 are three different driving members, they can drive the cutter 412, pusher 422 and first roller 52 to move respectively without affecting each other, so it is more flexible.

[0097] When the cutting driving member 411, pushing driving member 421 and first pressing driving member 51 are three different driving members, the cutting driving member 411, pushing driving member 421 and first pressing driving member 51 can all be cylinders or electric cylinders, etc. This embodiment does not limit this.

[0098] When the cutting driving member 411, pushing driving member 421 and first pressing driving member 51 are the same driving member, this driving member can also be a cylinder or an electric cylinder, etc. This embodiment does not limit this.

[0099] In order to better avoid the situation of large fluctuations of the strip L during transmission, and also to make the cutting of the strip L by the cutting component 41 to form a free end L1 and the pushing of the free end L1 into the gap 2 by the pushing component 42 smoother and more reliable. In some embodiments, referring to Figure 9, the winding device 200 further includes: a second pressing assembly 6, the second pressing assembly 6 is located downstream of the seam insertion mechanism 4, the second pressing assembly 6 includes a second pressing driving member 61 and a second roller 62, the second pressing driving member 61 is used to drive the second roller 62 to move toward or away from the needle body 1, so that the second roller 62 presses against or leaves the outer peripheral wall of the needle body 1, wherein, the axial direction of the second roller 62 is parallel to the axial direction of the needle body 1.

[0100] Since the second pressing assembly 6 is located downstream of the seam insertion mechanism 4, when the second pressing driving member 61 drives the second roller 62 to move toward the needle body 1 until it presses against the outer peripheral wall of the needle body 1, the second roller 62 can press the tape L against the outer peripheral wall of the needle body 1 downstream of the seam insertion mechanism 4. With such a setting, in addition to guiding the tape L upstream of the seam insertion mechanism 4 through the first roller 52, the tape L can also be guided downstream of the seam insertion mechanism 4 through the second roller 62. Therefore, on the one hand, it can better avoid the situation that the tape L shakes greatly during the transmission process, and on the other hand, it can also make the cutting of the tape 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 smoother and more reliable.

[0101] Among them, the above-mentioned second pressing driving member 61 can be a cylinder or an electric cylinder, etc., and this embodiment does not limit this.

[0102] In some embodiments, referring to Figure 9 , the first roller 52 is a one-way rotating roller, and the first rotation tangent direction F2 at the contact between the first roller 52 and the outer peripheral wall of the needle body 1 faces away from the upstream of the first roller 52.

[0103] By making the first roller 52 a one-way rotating roller and making the first rotation tangent direction F2 at the contact between the first roller 52 and the outer peripheral wall of the needle body 1 face away from the upstream of the first roller 52, the first roller 52 will allow the tape L to be conveyed downstream and prevent the tape L from being conveyed upstream. In this way, it can avoid the situation that the free end L1 of the tape L slides out of the gap 2 due to the tension from the upstream of the first roller 52.

[0104] Referring to Figure 10 , when the winding device 200 is applied to the scenario of processing the battery core, the above-mentioned tape L can be understood as two layers of diaphragms. It can be understood that when manufacturing the battery core, it is also necessary to insert the electrode plate J between the two layers of diaphragms. In order to insert the electrode plate J between the two layers of diaphragms, on the premise that the pusher 422 and the cutter 412 both avoid the needle body 1 and the first roller 52 and the second roller 62 both press against the outer peripheral wall of the needle body 1, first, the needle body 1 can be made to rotate around its own axis ( Figure 10 is Figure 9The state after the winding needle body 1 in it rotates counterclockwise), until the gap 2 passes through the second over-roller 62, so that both the first over-roller 52 and the second over-roller 62 are located upstream of the gap 2. At this time, in order to facilitate inserting the electrode tab J between the two layers of diaphragms, the first over-roller 52 can move away from the outer peripheral wall of the winding needle body 1 in a direction away from the winding needle body 1. In this way, the first over-roller 52 can create space to facilitate inserting the electrode tab J between the two layers of diaphragms.

[0105] After the first over-roller 52 moves away from the outer peripheral wall of the winding needle body 1 in a direction away from the winding needle body 1, only the second over-roller 62 continues to press against the outer peripheral wall of the winding needle body 1. In order to prevent the free end L1 of the strip L from slipping out of the gap 2 due to the tension from the upstream of the second over-roller 62 after the first over-roller 52 leaves the outer peripheral wall of the winding needle body 1, in some embodiments, refer to Figure 10 The second over-roller 62 is a one-way rotating over-roller, and the second rotation tangent direction F3 at the contact between the second over-roller 62 and the outer peripheral wall of the winding needle body 1 faces away from the upstream of the second over-roller 62.

[0106] By making the second over-roller 62 a one-way rotating over-roller and making the second rotation tangent direction F3 at the contact between the second over-roller 62 and the outer peripheral wall of the winding needle body 1 face away from the upstream of the second over-roller 62, the second over-roller 62 will allow the strip L to be conveyed downstream and prevent the strip L from being conveyed upstream. In this way, the situation where the free end L1 of the strip L slips out of the gap 2 due to the tension from the upstream of the second over-roller 62 can be avoided.

[0107] In some embodiments, refer to Figure 11 The winding device 200 has a winding station W1 and a blanking station W2. The winding device 200 further includes: an unwinding mechanism 7 and a turret 8. Among them, the turret 8 is rotatably arranged, the number of winding needles 100 is multiple, and the multiple winding needles 100 are all rotatably arranged on the turret 8. The in-seam mechanism 4 is arranged corresponding to the winding station W1. The unwinding mechanism 7 is used to convey the strip L to the winding needle 100 located at the winding station W1. The cutting assembly 41 is used to cut the strip L. The pushing assembly 42 is used to push the free end L1 of the cut strip L into the gap 2. Then, the free end L1 can be adsorbed and fixed in the gap 2 by the adsorption structure 3 arranged on the winding needle body 1, so that the free end L1 is fixed, and further, the free end L1 of the strip L in the gap 2 can be prevented from slipping out of the gap 2. Thus, the pin insertion action of the strip L is realized.

[0108] The winding needle 100 at the winding station W1 is used to wind the strip L around 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 blanking station W2 and rotate the winding needle 100 located at the blanking station W2 to the winding station W1 when rotating.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A winding needle (100), characterized in that, Comprising: A bobbin body (1); A slit (2) formed in the bobbin body (1) for accommodating the free end (L1) of the material tape (L); and An adsorption structure (3) provided on the bobbin body (1) for adsorbing and fixing the free end (L1) to the bobbin body (1) so that the free end (L1) is located within the slit (2); Wherein, the bobbin body (1) comprises: A first half-bobbin (11); A second half-bobbin (12), both the first half-bobbin (11) and the second half-bobbin (12) being provided with the adsorption structure (3); The adsorption structure (3) provided on the first half-bobbin (11) is for adsorbing the free end of one material tape (L), and the adsorption structure (3) provided on the second half-bobbin (12) is for adsorbing the free end (L1) of another material tape (L).

2. The winding needle (100) according to claim 1, characterized in that, The second half-bobbin (12) and the first half-bobbin (11) are arranged oppositely at intervals in a first direction (F1) to form the slit (2).

3. The coiling needle (100) according to claim 2, wherein The first half-bobbin (11) includes a first surface (111), the second half-bobbin (12) includes a second surface (121), the second surface (121) and the first surface (111) are arranged oppositely at intervals in the first direction (F1) to form the slit (2), and both the first surface (111) and the second surface (121) are provided with the adsorption structure (3).

4. The coiling needle (100) according to claim 3, characterized in that, The adsorption structure (3) includes adsorption holes.

5. The coiling pin (100) according to claim 4, characterized in that, The number of the adsorption holes provided on the first surface (111) is multiple, and the multiple adsorption holes are arranged axially on the first surface (111) of the bobbin body (1); and / or the number of the adsorption holes provided on the second surface (121) is multiple, and the multiple adsorption holes are arranged axially on the second surface (121) of the bobbin body (1).

6. The coiling needle (100) according to any one of claims 3-5, characterized in that, The adsorption structure (3) provided on the first half-bobbin (11) and the adsorption structure (3) provided on the second half-bobbin (12) can independently adsorb and fix the free end (L1).

7. A winding device (200), characterized in that, Comprising: The bobbin (100) according to any one of claims 1-6, wherein the bobbin body (1) can wind the material tape (L) from upstream; The sewing-in mechanism (4), the sewing-in mechanism (4) includes a cutting assembly (41) and a pushing assembly (42), the cutting assembly (41) includes 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 off the strip (L) to form the free end (L1), the pushing assembly (42) includes 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) and extend into the gap (2) to push the free end (L1) into the gap (2), the winding needle body (1) is used to wind the strip (L) around its own outer peripheral wall to form a bobbin when rotating around its own axis.

8. The winding device (200) according to claim 7, characterized in that, The winding device (200) further includes: A first pressing assembly (5), the first pressing assembly (5) is located upstream of the sewing-in mechanism (4), the first pressing assembly (5) includes a first pressing driving member (51) and a first roller (52), the first pressing driving member (51) is used to drive the first roller (52) to move towards or away from the winding needle body (1) to make the first roller (52) press against or leave the outer peripheral wall of the winding needle body (1).

9. The winding device (200) according to claim 8, characterized in that, The first roller (52) is a one-way rotating roller, and the first rotation tangent direction (F2) at the contact of the first roller (52) with the outer peripheral wall of the winding needle body (1) faces away from the upstream of the first roller (52).

10. The winding device (200) according to claim 7, characterized in that, The winding device (200) further includes: A second pressing assembly (6), the second pressing assembly (6) is located downstream of the sewing-in mechanism (4), the second pressing assembly (6) includes a second pressing driving member (61) and a second roller (62), the second pressing driving member (61) is used to drive the second roller (62) to move towards or away from the winding needle body (1) to make the second roller (62) press against or leave the outer peripheral wall of the winding needle body (1).

11. The winding device (200) according to claim 10, characterized in that, The second roller (62) is a one-way rotating roller, and the second rotation tangent direction (F3) at the contact of the second roller (62) with the outer peripheral wall of the winding needle body (1) faces away from the upstream of the second roller (62).

12. The winding device (200) according to claim 8, characterized in that, 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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