Roll changing device and battery cell winding equipment

Abstract

The utility model relates to the technical field of battery production equipment, in particular to a roll changing device and battery cell winding equipment. A roll changing device comprises an unwinding mechanism, a first material roll is arranged on the unwinding mechanism, and the first material roll is used for unwinding a material strip when rotating around the axis of the first material roll; the cutting mechanism is used for cutting off the material belt unwound by the unwinding mechanism, so that the material belt forms a cutting end located at the downstream of the cutting mechanism; and the unwinding mechanism is further used for arranging a second material roll, and the belt splicing mechanism is used for splicing the starting end of the second material roll to the cutting end. According to the reel changing device, due to the fact that the number of the unwinding mechanisms can be reduced, and automatic tape splicing of the material tape can be achieved, the occupied area can be reduced, and meanwhile the labor cost and the equipment cost can be reduced.

Description

Technical Field

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

[0002] The battery cell winding equipment is a kind of equipment that winds the diaphragm and the electrode together according to the preset requirements to prepare the battery cell. Specifically, the battery cell winding equipment usually includes a winding needle and a winding device. The winding device includes a diaphragm unwinding mechanism. The diaphragm unwinding mechanism is used to unwind the diaphragm to the winding needle. When the winding needle rotates, it can wind the unwound diaphragm around itself to prepare the battery cell. When a roll of old diaphragm is unwound, it needs to be replaced with a new roll of diaphragm to continue unwinding.

[0003] In the related art, considering the convenience of replacing the diaphragm, two sets of diaphragm unwinding mechanisms are usually provided, each set of diaphragm unwinding mechanisms is provided with a roll of diaphragm, so that after the first roll of diaphragm on one set of diaphragm unwinding mechanisms is unwound, the starting end of the second roll of diaphragm on the other set of diaphragm unwinding device can be manually spliced ​​with the tail end of the first roll of diaphragm, so as to continue unwinding through the second roll of diaphragm. However, providing two sets of diaphragm unwinding mechanisms will result in a higher cost for the material strip supply device. Utility Model Content

[0004] The present application discloses a roll changing device and a battery core winding device, which can reduce the floor space occupied by the roll changing device while reducing manpower and equipment costs.

[0005] In order to achieve the above objectives, in a first aspect, the present application discloses a roll changing device, comprising:

[0006] An unwinding mechanism, on which a first material roll is arranged, and the first material roll is used to unwind the material tape while rotating around its own axis;

[0007] A cutting mechanism, the cutting mechanism is used to cut off the material strip unwound by the unwinding mechanism, so that the material strip forms a cutting end located downstream of the cutting mechanism;

[0008] The tape splicing mechanism is also used to set the second material roll on the unwinding mechanism, and the tape splicing mechanism is used to splice the starting end of the second material roll to the cutting end.

[0009] When the reel changing device is used in a battery cell winding device, when it is necessary to unwind the material tape to the winding needle through the unwinding mechanism, first, the first material roll can be set on the unwinding mechanism, and then, the purpose of unwinding the material tape to the winding needle can be achieved by rotating the axis of the first material roll itself.

[0010] Taking into account that the length of the material tape in the first material roll is limited, after the unwinding mechanism unwinds the material tape of a preset length, the material tape in the first material roll may be completely unwound or is about to be completely unwound. When the material tape in the first material roll is completely unwound, it will be impossible to continue to unwind it to the winding needle. In order to be able to continuously unwind the material tape to the winding needle, the cutting mechanism can cut off the material tape between the unwinding mechanism and the winding needle after the unwinding mechanism unwinds the material tape of a preset length, so that the material tape forms a cutting end located downstream of the cutting mechanism. Then, the tape connecting mechanism can splice the starting end of the second material roll to the cutting end, so that the material tape in the second material roll is spliced ​​with the cutting end, thereby making the material tape in the second material roll and the material tape in the first material roll form a whole. Finally, the material tape in the second material roll can continue to be unwound to the winding needle, thereby achieving the purpose of continuously unwinding the material tape to the winding needle.

[0011] According to the above description, after the unwinding mechanism has finished unwinding the tape in the first roll, the starting end of the second roll is spliced ​​to the cutting end through the tape splicing mechanism, and the tape in the second roll can be continued to be unwound to the winding needle through the unwinding mechanism. It can be seen that the purpose of unwinding the tape in the first roll and the tape in the second roll to the winding needle can be achieved through the same set of unwinding mechanisms. Compared with the method of unwinding to the winding needle through two sets of unwinding mechanisms in the related art, since the roll changing device can reduce the number of unwinding mechanisms, on the one hand, it can reduce the cost of the roll changing device, and on the other hand, it can also reduce the floor space occupied by the roll changing device.

[0012] In addition, since the splicing mechanism can splice the starting end of the second material roll to the cutting end, that is, the material tape can be automatically spliced ​​through the splicing mechanism, therefore, compared with the manual splicing method in the related art, on the one hand, it can reduce the labor intensity of personnel, and on the other hand, it can also reduce labor costs.

[0013] Optionally, the cutting mechanism comprises:

[0014] Cutter;

[0015] The first fixing member, the cutter and the first fixing member are arranged in sequence along the conveying direction of the material tape and the first fixing member is located downstream of the cutter. The first fixing member is used to fix the material tape, and the cutter is used to cut the material tape after the first fixing member fixes the material tape. The first fixing member is also used to loosen the material tape after the starting end of the second material roll is spliced ​​to the cutting end.

[0016] Optionally, the cutting mechanism further comprises:

[0017] The second fixing member, the cutter and the first fixing member are arranged in sequence along the conveying direction of the material belt, the second fixing member is used to fix the material belt, and the cutter is used to cut the material belt after the first fixing member and the second fixing member fix the material belt.

[0018] Optionally:

[0019] The second fixing member is provided with an adsorption hole, and the adsorption hole is used for adsorbing and fixing the material belt;

[0020] and / or,

[0021] The first fixing member is provided with an adsorption hole, and the adsorption hole is used for adsorbing and fixing the material belt.

[0022] Optionally, the roll changing device further comprises:

[0023] A guide mechanism is used to straighten the material strip so that the first fixing member and the second fixing member fix the material strip.

[0024] Optionally, the guiding mechanism comprises:

[0025] A fixed roller, the fixed roller is located on a side of the material strip close to the first fixing member, and the fixed roller is located on a side of the first fixing member away from the second fixing member;

[0026] A movable roller is located on the side of the material strip opposite to the fixed roller, and is used to move along a preset direction to a side of the second fixing member away from the first fixing member to push the material strip to contact the fixed roller and the movable roller respectively to straighten the material strip.

[0027] Optionally, the roll changing device further comprises:

[0028] The roll changing mechanism is also used to replace the second material roll to the unwinding mechanism after the cutting mechanism cuts off the material strip unwound by the unwinding mechanism.

[0029] Optionally, the unwinding mechanism comprises an unwinding shaft, the unwinding shaft is used to pass the first material roll, the unwinding shaft unwinds the material tape when rotating, and the axis of the unwinding shaft coincides with the axis of the first material roll;

[0030] A preparation shaft coaxial with the unwinding shaft is extended from one end of the unwinding shaft, and the preparation shaft is used to pass one or more second material rolls, and the roll changing mechanism is used to push one of the one or more second material rolls from the preparation shaft to the unwinding shaft after the cutting mechanism cuts off the material tape.

[0031] Optionally, the belt connecting mechanism comprises:

[0032] Motion drive parts;

[0033] An adsorption head, wherein the adsorption head is arranged on the motion driving member, the adsorption head is used to adsorb the starting end, the motion driving member is used to drive the adsorption head to move in a direction close to the cutting end, drive the starting end to abut against the cutting end to splice the starting end to the cutting end, and the adsorption head is also used to stop adsorbing the starting end after the starting end is spliced ​​to the cutting end.

[0034] Optionally, the belt connecting mechanism further includes:

[0035] A rotating drive member, wherein the rotating drive member is arranged on the motion drive member, the adsorption head is arranged on the rotating drive member, the adsorption head is used to adsorb the outer surface of the starting end, the rotating drive member is used to drive the adsorption head to rotate along a first rotation direction to rotate the inner surface of the starting end toward the cutting end, and the motion drive member is used to drive the adsorption head to move in a direction close to the cutting end to drive the inner surface of the starting end to abut against the cutting end, wherein the inner surface of the starting end refers to the side of the starting end facing the axis of the first material roll when the starting end is wound on the first material roll, and the outer surface of the starting end refers to the side opposite to the inner surface of the starting end.

[0036] Optionally, the rotation axis of the rotary drive member is parallel to the axis of the first material roll, and the adsorption head is arranged on the rotation axis of the rotary drive member.

[0037] Optionally, the roll changing device further comprises:

[0038] A gluing mechanism is used to stick a tape on at least one of the starting end and the cutting end, and the starting end is spliced ​​to the cutting end through the tape.

[0039] In a second aspect, the present application discloses a battery cell winding device, comprising:

[0040] The roll changing device as described in any one of the first aspects above; and

[0041] Roll needle.

[0042] Compared with the prior art, the beneficial effects of this application are:

[0043] In the present application, when the reel changing device is used in a battery cell winding device, when it is necessary to unwind the material tape to the winding needle through the unwinding mechanism, first, the first material roll can be set on the unwinding mechanism, and then, the purpose of unwinding the material tape to the winding needle can be achieved by rotating the axis of the first material roll itself.

[0044] The strip of material in the first roll is then unwound to the desired length, and the strip of material in the second roll is then unwound to the desired length.

[0045] According to the above description, after the unwinding mechanism has finished unwinding the tape in the first roll, the starting end of the second roll is spliced ​​to the cutting end through the tape splicing mechanism, and the tape in the second roll can be continued to be unwound to the winding needle through the unwinding mechanism. It can be seen that the purpose of unwinding the tape in the first roll and the tape in the second roll to the winding needle can be achieved through the same set of unwinding mechanisms. Compared with the method of unwinding to the winding needle through two sets of unwinding mechanisms in the related art, since the roll changing device can reduce the number of unwinding mechanisms, on the one hand, it can reduce the cost of the roll changing device, and on the other hand, it can also reduce the floor space occupied by the roll changing device.

[0046] In addition, since the splicing mechanism can splice the starting end of the second material roll to the cutting end, that is, the material tape can be automatically spliced ​​through the splicing mechanism, therefore, compared with the manual splicing method in the related art, on the one hand, it can reduce the labor intensity of personnel, and on the other hand, it can also reduce labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 It is a structural schematic diagram of a roll changing device provided in an embodiment of the present application;

[0049] Figure 2 yes Figure 1 Left view of the middle roll changing mechanism and unwinding mechanism;

[0050] Figure 3 yes Figure 1 A schematic diagram of the structure of the roll changing device when the material strip is cut;

[0051] Figure 4A is a schematic structural diagram of another roll changing device provided in an embodiment of the present application;

[0052] Figure 4B yes Figure 4A A schematic diagram of the structure of the roll changing device when the material strip is cut;

[0053] Figure 5 yes Figure 4A A schematic diagram of the structure when the moving roller in the preset direction has not moved into position;

[0054] Figure 6 It is a structural schematic diagram of another roll changing device provided in an embodiment of the present application;

[0055] Figure 7 yes Figure 6 A schematic diagram of the structure after the adsorption head is rotated 180 degrees along the first rotation direction;

[0056] Figure 8 yes Figure 7 Schematic diagram of the structure after the starting end and the cut end are spliced;

[0057] Fig. 9 is a structural schematic diagram of another roll changing device provided in an embodiment of the present application;

[0058] Fig.10 It is a structural schematic diagram of a battery cell winding device provided in an embodiment of the present application.

[0059] Description of main reference numerals

[0060] 1- unwinding mechanism; 11- unwinding shaft; 111- material preparation shaft;

[0061] 2-cutting mechanism; 21-second fixing member; 22-cutter; 23-first fixing member;

[0062] 3-Roll changing mechanism;

[0063] 4-belt connection mechanism; 41-motion driving member; 42-adsorption head; 43-rotation driving member;

[0064] 5-guiding mechanism; 51-fixed roller; 52-movable roller;

[0065] 6-Glue sticking mechanism;

[0066] 100-reel changing device; 200-reeling needle; 300-cell winding equipment;

[0067] A1-first material roll; A2-second material roll; A21-starting end; A211-inner surface; A212-outer surface; B-material tape; B1-cutting end; F-transmission direction; O-axis of the first material roll; Y-preset direction; Z-first rotation direction. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0069] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application 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.

[0070] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0071] In addition, the terms "installed", "set", "provided with", "connected", and "connected" 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 a direct connection, or an indirect connection through an intermediate medium, or it can be 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 this application can be understood according to specific circumstances.

[0072] In addition, the terms "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, "plurality" means two or more.

[0073] The technical solution of the present application will be further described below in conjunction with specific embodiments and drawings.

[0074] See also Figure 1 , Figure 2 and Figure 3 The roll changing device 100 includes: an unwinding mechanism 1, a cutting mechanism 2 and a tape splicing mechanism 4, wherein the unwinding mechanism 1 is used to set a first material roll A1, and the first material roll A1 is used to unwind a material tape B when rotating around its own axis O, and the cutting mechanism 2 is used to cut the material tape B unwound by the unwinding mechanism 1, so that the material tape B forms a cutting end B1 located downstream of the cutting mechanism 2. The unwinding mechanism 1 is also used to set a second material roll A2, and the tape splicing mechanism 4 is used to splice the starting end A21 of the second material roll A2 to the cutting end B1.

[0075] In this embodiment, when the reel changing device is used in the battery cell winding equipment, when it is necessary to unwind the material tape B to the winding needle 200 through the unwinding mechanism 1, first, the first material roll A1 can be set on the unwinding mechanism 1, and then, the purpose of unwinding the material tape B to the winding needle 200 can be achieved by rotating the first material roll A1 around its own axis O.

[0076] Considering that the length of the material strip B in the first material roll A1 is limited, after the unwinding mechanism 1 unwinds the material strip B of a preset length, the material strip B in the first material roll A1 may be completely unwound or about to be completely unwound. After the material strip B in the first material roll A1 is completely unwound, it will be impossible to continue unwinding the material strip B to the winding needle 200. In order to continue unwinding the material strip B to the winding needle 200, the cutting mechanism 2 can cut off the material strip B between the unwinding mechanism 1 and the winding needle 200 after the unwinding mechanism 1 unwinds the material strip B of a preset length. , so that the material strip B forms a cutting end B1 located downstream of the cutting mechanism 2, and then, the tape connecting mechanism 4 can splice the starting end A21 of the second material roll A2 to the cutting end B1, so that the material strip B in the second material roll A2 is spliced ​​with the cutting end B1, and then the material strip B in the second material roll A2 and the material strip B in the first material roll A1 form a whole, finally, the material strip B in the second material roll A2 can continue to be unwound to the winding needle 200, so as to achieve the purpose of continuously unwinding the material strip B to the winding needle 200.

[0077] According to the above description, after the unwinding mechanism 1 has finished unwinding the material tape B in the first material roll A1, the starting end A21 of the second material roll A2 is spliced ​​to the cutting end B1 through the tape splicing mechanism 4, and the material tape B in the second material roll A2 can be continued to be unwound to the winding needle 200 through the unwinding mechanism 1. It can be seen that the purpose of unwinding the material tape B in the first material roll A1 and the material tape B in the second material roll A2 to the winding needle 200 can be achieved through the same set of unwinding mechanisms 1. Compared with the method of unwinding to the winding needle 200 through two sets of unwinding mechanisms 1 in the related art, since the roll changing device 100 can reduce the number of unwinding mechanisms 1, on the one hand, the cost of the roll changing device 100 can be reduced, and on the other hand, the floor space occupied by the roll changing device 100 can also be reduced.

[0078] In addition, since the splicing mechanism 4 can splice the starting end A21 of the second material roll A2 to the cutting end B1, that is, the material tape can be automatically spliced ​​through the splicing mechanism 4, therefore, compared with the manual splicing method in the related art, on the one hand, it can reduce the labor intensity of personnel, and on the other hand, it can also reduce labor costs.

[0079] It should be noted that the above-mentioned preset length can be any value less than the total length of the material strip B in the first material roll A1. For example, when the total length of the material strip B in the first material roll A1 is 10m, the preset length can be 9m, 9.5m, etc., and this embodiment does not limit this. In order to avoid waste of the material strip B as much as possible, the preset length can be as close as possible to the total length of the material strip B in the first material roll A1. When the preset length is as close as possible to the total length of the material strip B in the first material roll A1, the material strip B in the first material roll A1 can be unwound to the winding needle 200 to the greatest extent, thereby avoiding waste of the material strip B.

[0080] In addition, the cutting end B1 and the starting end A21 can be understood in a broad sense. Specifically, the cutting end B1 and the starting end A21 can be understood as a section of the material strip B close to the end, rather than just the end itself.

[0081] It should also be noted that when the reel changing device 100 is used in a battery cell winding device, the material strip B can be understood as a diaphragm or a pole piece, etc. Of course, the reel changing device 100 can also be used in other possible scenarios, and the material strip B can also be understood in other ways according to different scenarios, and the present embodiment does not limit the material strip B.

[0082] It is worth noting that after the material strip B in the first material roll A1 is unwound, the empty material roll can be removed from the unwinding mechanism 1, or the empty material roll can continue to be placed on the unwinding mechanism 1, and after the number of empty material rolls reaches a certain number, multiple empty material rolls can be removed from the unwinding mechanism 1 at one time. This embodiment does not limit this.

[0083] In some embodiments, see Figure 4A and Figure 4B The cutting mechanism 2 includes: a cutter 22 and a first fixing member 23, wherein the cutter 22 and the first fixing member 23 are arranged in sequence along the conveying direction F of the material strip B and the first fixing member 23 is located downstream of the cutter 22, the first fixing member 23 is used to fix the material strip B, the cutter 22 is used to cut the material strip B after the first fixing member 23 fixes the material strip B, and the first fixing member 23 is also used to loosen the material strip B after the starting end A21 of the second material roll A2 is spliced ​​to the cutting end B1.

[0084] In this embodiment, when it is necessary to cut the material strip B by the cutter 22, the material strip B can be first fixed by the first fixing member 23. Since the cutter 22 and the first fixing member 23 are arranged in sequence along the conveying direction F of the material strip B and the first fixing member 23 is located downstream of the cutter 22, after the cutter 22 cuts the material strip B, the first fixing member 23 can fix the material strip downstream of the cutter 22, thereby preventing the material strip B downstream of the cutter 22 from sliding downstream, thereby preventing the cutting end B1 from sliding downstream, and providing convenience for the subsequent splicing of the starting end A21 of the second material roll A2 to the cutting end B1 through the tape splicing mechanism 4.

[0085] Further, in some embodiments, see Figure 4A and Figure 4B The cutting mechanism 2 also includes: a second fixing member 21, the second fixing member 21, the cutter 22 and the first fixing member 23 are arranged in sequence along the conveying direction F of the material strip B, the second fixing member 21 is used to fix the material strip B, and the cutter 22 is used to cut the material strip B after the first fixing member 23 and the second fixing member 21 fix the material strip B.

[0086] Since the second fixing member 21, the cutter 22 and the first fixing member 23 are arranged in sequence along the conveying direction F of the unwinding mechanism 1, the second fixing member 21 and the first fixing member 23 are both used to fix the material strip B. Therefore, when it is necessary to cut the material strip B by the cutter 22, the second fixing member 21 and the first fixing member 23 can play the role of fixing the material strip B on both sides of the cutter 22 along the conveying direction F. In this way, it is convenient to cut the material strip B between the second fixing member 21 and the first fixing member 23 by the cutter 22, thereby avoiding the situation that the material strip B is loose and cannot be cut when the cutter 22 cuts the material strip B.

[0087] After the cutter 22 cuts off the material tape B between the second fixing member 21 and the first fixing member 23 to form the cutting end B1, and the tape connecting mechanism 4 splices the starting end A21 of the second material roll A2 to the cutting end B1, in order for the winding needle 200 to continue to wind the material tape B, the first fixing member 23 can loosen the material tape B. In this way, the winding needle 200 can continue to wind the material tape B, and the situation where the winding needle 200 does not need to continue to wind the material tape B due to the first fixing member 23 fixing the material tape B can be avoided.

[0088] There are many ways for the second fixing member 21 to fix the material strip B. In one possible implementation, the second fixing member 21 may be a clamping claw. When the second fixing member 21 is a clamping claw, the material strip B can be fixed by clamping. In another possible implementation, the second fixing member 21 is provided with an adsorption hole, and the adsorption hole is used to adsorb and fix the material strip B. When the second fixing member 21 is provided with an adsorption hole, the material strip B can be fixed by adsorption, which can avoid the material strip B from being clamped compared to the clamping method.

[0089] The structure of the first fixing member 23 may be the same as that of the second fixing member 21. Specifically, the first fixing member 23 may be provided with adsorption holes, which may also be used to adsorb and fix the material strip B. When the first fixing member 23 is provided with adsorption holes, it can bring about an effect similar to that of the second fixing member 21 having adsorption holes. For details, please refer to the description of the second fixing member 21 in the above embodiment, which will not be repeated in this embodiment.

[0090] In order to make the second fixing member 21 and the first fixing member 23 better fix the material strip B, in some embodiments, see Figure 4A The roll changing device 100 further includes: a guide mechanism 5, which is used to straighten the material strip B so that the first fixing member 23 and the second fixing member 21 can fix the material strip B.

[0091] Since the guide mechanism 5 can straighten the material strip B, it can be understood that when the material strip B is in a straightened state, the layout of the material strip B can be made more regular, which is convenient for the first fixing member 23 and the second fixing member 21 to fix the material strip B, and then the first fixing member 23 and the second fixing member 21 can fix the material strip B more securely.

[0092] Specifically, when both the second fixing member 21 and the first fixing member 23 are provided with adsorption holes, when the material strip B is adsorbed and fixed through the adsorption holes, under the guiding action of the guide mechanism 5, the material strip B can be fully contacted with the side of the second fixing member 21 provided with the adsorption holes and the side of the first fixing member 23 provided with the adsorption holes, respectively, so that the adsorption effect of the second fixing member 21 and the first fixing member 23 on the material strip B can be stronger, so that the second fixing member 21 and the first fixing member 23 can better adsorb and fix the material strip B.

[0093] In some embodiments, see Figure 4A and Figure 5 The guide mechanism 5 includes a fixed roller 51 and a movable roller 52, wherein the fixed roller 51 is located on the side of the material strip B close to the first fixing member 23 ( Figure 4A The fixing roller 51 is located on the side of the first fixing member 23 away from the second fixing member 21 ( Figure 4AThe moving roller 52 is located on the side of the material strip B away from the first fixing member 23 ( Figure 4A The moving roller 52 is used to move along the preset direction Y to the side of the second fixing member 21 away from the first fixing member 23 ( Figure 4A The lower side of the second fixing member 21 in the middle is used to push the material strip B to contact the fixed roller 51 and the movable roller 52 respectively to straighten the material strip B.

[0094] In this embodiment, since the fixed roller 51 is located on the side of the material strip B close to the first fixing member 23 and on the side of the first fixing member 23 away from the second fixing member 21, and since the moving roller 52 is located on the side of the material strip B away from the first fixing member 23, when the moving roller 52 moves along the preset direction Y toward the side of the second fixing member 21 away from the first fixing member 23, the moving roller 52 can abut against the side of the material strip B away from the first fixing member 23. After the moving roller 52 abuts against the side of the material strip B away from the first fixing member 23, as the moving roller 52 continues to move along the preset direction toward the side of the second fixing member 21 away from the first fixing member 23, the moving roller 52 will push the material strip B to abut against the fixed roller 51 and the moving roller 52 respectively, thereby achieving the purpose of straightening the material strip B.

[0095] It can be seen that by setting the movable roller 52, the conveying trajectory of the material belt B can be adjusted during the movement of the movable roller 52. On the one hand, the conveying trajectory of the material belt B can be flexibly adjusted according to the demand situation. On the other hand, under the pushing action of the movable roller 52, the material belt B can be straightened, so that the second fixing member 21 and the first fixing member 23 can better fix the material belt B.

[0096] In some embodiments, see Figure 1 and Figure 2 The roll changing device 100 further includes: a roll changing mechanism 3, which is also used to replace the second material roll A2 to the unwinding mechanism 1 after the cutting mechanism 2 cuts off the material strip B unwound by the unwinding mechanism 1.

[0097] By providing the roll changing device 100, the second material roll A2 can be automatically replaced to the unwinding mechanism 1, so that the automation degree of the roll changing device 100 can be made higher, and the labor intensity of personnel can be further reduced.

[0098] Of course, the second material roll A2 may also be replaced to the unwinding mechanism 1 manually, which is not limited in this embodiment.

[0099] In some embodiments, see Figure 2The unwinding mechanism 1 includes an unwinding shaft 11, which is used to pass the first material roll A1. When the unwinding shaft 11 rotates, it is used to unwind the material tape B to the winding needle 200, and the axis of the unwinding shaft 11 coincides with the axis O of the first material roll A1.

[0100] Since the unwinding shaft 11 passes through the first material roll A1 , when the unwinding shaft 11 rotates, the first material roll A1 can be driven to rotate around the axis of the unwinding shaft 11 , thereby achieving the purpose of unwinding the material tape B to the winding needle 200 .

[0101] By allowing the unwinding shaft 11 to pass through the first material roll A1, on the one hand, the unwinding shaft 11 can carry the first material roll A1, and on the other hand, when the unwinding shaft 11 rotates, it can also drive the first material roll A1 to rotate, thereby achieving the unwinding function.

[0102] In some embodiments, see Figure 2 A preparation shaft 111 coaxial with the unwinding shaft 11 is extended from one end of the unwinding shaft 11, and the preparation shaft 111 is used to pass one or more second material rolls A2, and the roll changing mechanism 3 is used to push one of the one or more second material rolls A2 from the preparation shaft 111 to the unwinding shaft 11 after the cutting mechanism 2 cuts off the material strip B.

[0103] Since the material preparation shaft 111 is arranged at one end of the unwinding shaft 11 and is coaxially arranged with the unwinding shaft 11, and since one or more second material rolls A2 are passed through the material preparation shaft 111, after the cutting mechanism 2 cuts the material strip B, the roll changing mechanism 3 can push one of the one or more second material rolls A2 from the material preparation shaft 111 to the unwinding shaft 11, thereby achieving the purpose of replacing the second material roll A2 with the unwinding shaft 11. In this way, after the first material roll A1 on the unwinding shaft 11 is unwound, the second material roll A2 is pushed by the roll changing mechanism 3, so that the second material roll A2 slides from the material preparation shaft 111 to the unwinding shaft 11, thereby achieving the purpose of replacing the second material roll A2 with the unwinding shaft 11. The structural design is simple, thereby achieving the purpose of reducing the cost of the roll changing device 100.

[0104] The roll changing mechanism 3 may be a cylinder or any device capable of pushing the second material roll A2 from the material preparation shaft 111 to the unwinding shaft 11 . The present embodiment does not limit the roll changing mechanism 3 .

[0105] In some embodiments, see Figure 6The belt connecting mechanism 4 includes: a motion driving member 41 and an adsorption head 42, wherein the adsorption head 42 is arranged on the motion driving member 41, and the adsorption head 42 is used to adsorb the starting end A21. The motion driving member 41 is used to drive the adsorption head 42 to move toward the direction close to the cutting end B1, and drive the starting end A21 to abut against the cutting end B1 to splice the starting end A21 to the cutting end B1. The adsorption head 42 is also used to stop adsorbing the starting end A21 after the starting end A21 is spliced ​​to the cutting end B1.

[0106] Since the adsorption head 42 is arranged on the motion driving member 41, after the cutting mechanism 2 cuts off the material strip B and the second material roll A2 is replaced to the unwinding mechanism 1, the starting end A21 of the second material roll A2 can be adsorbed by the adsorption head 42, and then, the adsorption head 42 can be driven by the motion driving member 41 to move in the direction close to the cutting end B1, so that the starting end A21 abuts against the cutting end B1. When the starting end A21 abuts against the cutting end B1, when the starting end A21 and the cutting end B1 are self-adhesive, the purpose of splicing the starting end A21 to the cutting end B1 can be achieved.

[0107] It can be seen that when the adsorption head 42 adsorbs the starting end A21, the motion driving member 41 drives the adsorption head 42 to move toward the cutting end B1, so as to achieve the purpose of splicing the starting end A21 to the cutting end B1. In this process, the adsorption head 42 can play a role similar to a clamp. Since the adsorption head 42 does not need to clamp the starting end A21 during the process of driving the starting end A21 to move, it can avoid the situation where the starting end A21 is clamped and damaged.

[0108] The motion driving member 41 may be a robot arm or any other device capable of driving the adsorption head 42 to move toward the cutting end B1, and this embodiment does not limit the motion driving member 41. The adsorption head 42 may be an adsorption plate or any other possible structure, and this embodiment does not limit this.

[0109] It should be noted that, in addition to the function of splicing the starting end A21 to the cutting end B1, the above-mentioned suction head 42 can also have the function of unwinding. Specifically, before the second material roll A2 is used, the starting end A21 of the second material roll A2 is usually fixed to the second material roll A2 by adhesive tape. Therefore, before the suction head 42 splices the starting end A21 to the cutting end B1, the suction head 42 can also tear off the tape from the second material roll A2, so that the starting end A21 is detached from the second material roll A2 and the second material roll A2 is unrolled, so as to prepare for the subsequent splicing of the starting end A21 to the cutting end B1.

[0110] In some embodiments, see Figure 6 , Figure 7 and Figure 8The belt connecting mechanism 4 further includes: a rotating driving member 43, the rotating driving member 43 is arranged on the motion driving member 41, the adsorption head 42 is arranged on the rotating driving member 43, the adsorption head 42 is used to adsorb the outer surface A212 of the starting end A21, and the rotating driving member 43 is used to drive the adsorption head 42 to rotate along the first rotation direction Z to rotate the inner surface A211 of the starting end A21 to face the cutting end B1 ( Figure 7 The motion driving member 41 is used to drive the adsorption head 42 to move toward the cutting end B1, driving the inner surface A211 of the starting end A21 to abut against the cutting end B1 ( Figure 8 The inner surface A211 of the starting end A21 refers to the side of the starting end A21 facing the axis O of the first material roll A1 when the starting end A21 is wound on the first material roll A1, and the outer surface A212 of the starting end A21 refers to the side opposite to the inner surface A211 of the starting end A21.

[0111] Since the adsorption head 42 is arranged on the rotating driving member 43, when the adsorption head 42 adsorbs the outer surface A212 of the starting end A21, when the rotating driving member 43 drives the adsorption head 42 to rotate along the first rotation direction Z, the starting end A21 can be slowly wrapped around the outer surface of the adsorption head 42, and the inner surface A211 of the starting end A21 can be directed to the outside of the adsorption head 42. In this case, as the adsorption head 42 rotates, the inner surface A211 of the starting end A21 can be rotated toward the cutting end B1. Then, the moving driving member 41 can drive the adsorption head 42 to move in the direction close to the cutting end B1, so that the inner surface A211 of the starting end A21 abuts against the cutting end B1, thereby achieving the purpose of splicing the starting end A21 to the cutting end B1.

[0112] Among them, by setting a rotating driving member 43, the inner surface A211 of the starting end A21 can be rotated to face the cutting end B1 under the rotation action of the rotating driving member 43, and the adsorption head 42 will be located on the side of the starting end A21 away from the cutting end B1. In this way, when the starting end A21 and the cutting end B1 are spliced ​​with each other, the adsorption head 42 will not interfere with the splicing of the starting end A21 and the cutting end B1, so that the starting end A21 and the cutting end B1 can be spliced ​​together more securely.

[0113] It should be noted that the first rotation direction Z can be counterclockwise or clockwise, which is not limited in this embodiment. The rotation angle of the adsorption head 42 driven by the rotary drive member 43 along the first rotation direction Z can be 180 degrees or other possible angles, as long as the inner surface A211 of the starting end A21 can be rotated to face the cutting end B1, which is not limited in this embodiment.

[0114] In addition, the first material roll A1 and the second material roll A2 may rotate clockwise or counterclockwise when unwinding, and this embodiment does not limit this.

[0115] In some embodiments, see Figure 2 and Figure 7 The rotation axis of the rotating driving member 43 is parallel to the axis O of the first material roll A1 , and the adsorption head 42 is disposed on the rotation axis of the rotating driving member 43 .

[0116] By making the rotating axis of the rotating driving member 43 parallel to the axis of the first material roll A1, compared to the method where the rotating axis of the rotating driving member 43 is perpendicular to the axis of the first material roll A1, the starting end A21 can be wound very flatly on the adsorption head 42, thereby preventing the material strip B from becoming tangled or wound into a twist shape.

[0117] In some embodiments, see Fig. 9 The roll changing device 100 further includes: a gluing mechanism 6, which is used to stick a tape to at least one of the starting end A21 and the cutting end B1, and the starting end A21 is spliced ​​to the cutting end B1 through the tape.

[0118] By providing the gluing mechanism 6, since the gluing mechanism 6 can apply adhesive tape to at least one of the starting end A21 and the cutting end B1, the starting end A21 can be more securely spliced ​​to the cutting end B1 under the action of the adhesive tape.

[0119] The gluing mechanism 6 may be a robot or any device capable of applying adhesive tape to at least one of the starting end A21 and the cutting end B1 . The present embodiment does not limit the gluing mechanism 6 .

[0120] The present application also provides a battery cell winding device 300, see Fig.10 , including a roll changing device 100 and a roll needle 200.

[0121] Among them, the structure of the roll changing device 100 can be the same as the structure of any roll changing device 100 in the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description of the roll changing device 100 in the above embodiments, and this embodiment will not be repeated here.

[0122] In this embodiment, since the cost of the roll changing device 100 is reduced and the floor space occupied is small, when the battery cell winding equipment 300 includes the roll changing device 100, the cost of the battery cell winding equipment 300 can be reduced and the floor space occupied by the battery cell winding equipment 300 can be reduced.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these 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 application.

Claims

1. A roll changing device (100), characterized in that: include: An unwinding mechanism (1), wherein a first material roll (A1) is arranged on the unwinding mechanism (1), and the first material roll (A1) is used to unwind the material strip (B) when rotating around its own axis; A cutting mechanism (2), the cutting mechanism (2) being used to cut off the material strip (B) unwound by the unwinding mechanism (1), so that the material strip (B) forms a cutting end (B1) located downstream of the cutting mechanism (2); The tape splicing mechanism (4) is also used to arrange the second material roll (A2) on the unwinding mechanism (1), and the tape splicing mechanism (4) is used to splice the starting end (A21) of the second material roll (A2) to the cutting end (B1).

2. The roll changing device (100) according to claim 1, characterized in that: The cutting mechanism (2) comprises: Cutter (22); A first fixing member (23), the cutter (22) and the first fixing member (23) are arranged in sequence along the conveying direction (F) of the material tape (B), and the first fixing member (23) is located downstream of the cutter (22); the first fixing member (23) is used to fix the material tape (B); the cutter (22) is used to cut the material tape (B) after the first fixing member (23) fixes the material tape (B); the first fixing member (23) is also used to loosen the material tape (B) after the starting end (A21) of the second material roll (A2) is spliced ​​to the cutting end (B1).

3. The roll changing device (100) according to claim 2, characterized in that: The cutting mechanism (2) further comprises: A second fixing member (21), the second fixing member (21), the cutter (22) and the first fixing member (23) are arranged in sequence along the conveying direction (F) of the material tape (B), the second fixing member (21) is used to fix the material tape (B), and the cutter (22) is used to cut the material tape (B) after the first fixing member (23) and the second fixing member (21) fix the material tape (B).

4. The roll changing device (100) according to claim 3, characterized in that: The second fixing member (21) is provided with an adsorption hole, and the adsorption hole is used to adsorb and fix the material strip (B); and / or, The first fixing member (23) is provided with an adsorption hole, and the adsorption hole is used to adsorb and fix the material belt (B).

5. The roll changing device (100) according to claim 3, characterized in that: The roll changing device (100) further comprises: A guiding mechanism (5), wherein the guiding mechanism (5) is used to straighten the material strip (B) so that the first fixing member (23) and the second fixing member (21) can fix the material strip (B).

6. The roll changing device (100) according to claim 5, characterized in that: The guiding mechanism (5) comprises: a fixed roller (51), the fixed roller (51) being located on a side of the material strip (B) close to the first fixing member (23), and the fixed roller (51) being located on a side of the first fixing member (23) away from the second fixing member (21); A movable roller (52), the movable roller (52) being located on the side of the material strip (B) opposite to the fixed roller (51), the movable roller (52) being used to move along a preset direction (Y) to a side of the second fixing member (21) away from the first fixing member (23) to push the material strip (B) to contact the fixed roller (51) and the movable roller (52) respectively to straighten the material strip (B).

7. The roll changing device (100) according to claim 1, characterized in that: The roll changing device (100) further comprises: A roll changing mechanism (3), the roll changing mechanism (3) is also used to replace the second material roll (A2) to the unwinding mechanism (1) after the cutting mechanism (2) cuts the material strip (B) unwound by the unwinding mechanism (1).

8. The roll changing device (100) according to claim 7, characterized in that: The unwinding mechanism (1) comprises an unwinding shaft (11), the unwinding shaft (11) is used to pass the first material roll (A1), the unwinding shaft (11) unwinds the material strip (B) when rotating, and the axis of the unwinding shaft (11) coincides with the axis of the first material roll (A1); A material preparation shaft (111) coaxial with the unwinding shaft (11) is extended from one end of the unwinding shaft (11), and the material preparation shaft (111) is used to pass one or more second material rolls (A2), and the roll changing mechanism (3) is used to push one of the one or more second material rolls (A2) from the material preparation shaft (111) to the unwinding shaft (11) after the cutting mechanism (2) cuts off the material tape (B).

9. The roll changing device (100) according to any one of claims 1 to 8, characterized in that: The belt connecting mechanism (4) comprises: Motion drive member (41); An adsorption head (42), wherein the adsorption head (42) is arranged on the motion driving member (41), and the adsorption head (42) is used to adsorb the starting end (A21). The motion driving member (41) is used to drive the adsorption head (42) to move in a direction close to the cutting end (B1), and drive the starting end (A21) to abut against the cutting end (B1) so as to splice the starting end (A21) to the cutting end (B1). The adsorption head (42) is also used to stop adsorbing the starting end (A21) after the starting end (A21) is spliced ​​to the cutting end (B1).

10. The roll changing device (100) according to claim 9, characterized in that: The belt connecting mechanism (4) further comprises: The rotary drive member (43) is arranged on the motion drive member (41), the adsorption head (42) is arranged on the rotary drive member (43), the adsorption head (42) is used to adsorb the outer surface (A212) of the starting end (A21), the rotary drive member (43) is used to drive the adsorption head (42) to rotate along the first rotation direction (Z) to rotate the inner surface (A211) of the starting end (A21) toward the cutting end (B1), and the motion drive member (41) is used to drive the adsorption head (42) to rotate along the first rotation direction (Z) to rotate the inner surface (A211) of the starting end (A21) toward the cutting end (B1). The attached head (42) moves in a direction approaching the cutting end (B1), driving the inner surface (A211) of the starting end (A21) to abut against the cutting end (B1), wherein the inner surface (A211) of the starting end (A21) refers to the side of the starting end (A21) facing the axis of the first material roll (A1) when the starting end (A21) is wound on the first material roll (A1), and the outer surface (A212) of the starting end (A21) refers to the side opposite to the inner surface (A211) of the starting end (A21).

11. The roll changing device (100) according to claim 10, characterized in that: The rotation axis of the rotating driving member (43) is parallel to the axis of the first material roll (A1), and the adsorption head (42) is arranged on the rotation axis of the rotating driving member (43).

12. The roll changing device (100) according to any one of claims 1 to 8 or 10 to 11, characterized in that: The roll changing device (100) further comprises: A gluing mechanism (6), the gluing mechanism (6) is used to apply a tape to at least one of the starting end (A21) and the cutting end (B1), the starting end (A21) being spliced ​​to the cutting end (B1) via the tape.

13. A battery cell winding device (300), characterized in that: include: The roll changing device (100) according to any one of claims 1 to 12; Rolling needle (200).

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