Tape splicing mechanism, roll changing device and battery cell winding equipment

Abstract

The utility model relates to the technical field of battery processing equipment, in particular to a tape splicing mechanism, a roll changing device and battery cell winding equipment. A belt connecting mechanism comprises an installation assembly used for being connected with a motion driving piece; the abutting assembly comprises a first abutting piece, the first abutting piece is connected to the mounting assembly, and the first abutting piece can float relative to the mounting assembly when being subjected to external force, so that the first inclination angle of the first abutting piece is changed; the movement driving part is used for driving the mounting assembly to drive the first abutting part to abut against a first new material roll, and the first inclination angle is an included angle between the first abutting part and the axial direction of the first new material roll. According to the tape splicing mechanism, the tail end of the first old material roll and the head end of the first new material roll can be firmly bonded.

Description

Technical Field

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

[0002] The battery cell winding equipment is a kind of equipment used to stack and wind up the pole pieces and diaphragms according to certain rules to make a battery cell. Specifically, the battery cell winding equipment usually includes a winding needle and an unwinding mechanism. The unwinding mechanism is provided with a pole piece roll or a diaphragm roll, etc. Taking the pole piece roll as an example, the unwinding mechanism can unwind the pole piece in the pole piece roll to the winding needle for the winding needle to wind and make a battery cell. It can be understood that as the winding proceeds, the pole piece in the old pole piece roll will be unwound and cannot be unwound further. In order to continuously unwind the pole piece to the winding needle, the tail end of the old pole piece roll can be bonded to the head end of the new pole piece roll by double-sided tape. In this way, the purpose of continuously unwinding the pole piece to the winding needle can be achieved.

[0003] In order to make the tail end of the old pole piece roll and the head end of the new pole piece roll firmly bonded together by double-sided adhesive tape to avoid the situation of fracture at the bonding point, the related technology usually provides a tape splicing mechanism to achieve this. Specifically, the tape splicing mechanism usually includes a pressure roller, the extension direction of the pressure roller is parallel to the axial direction of the new pole piece roll, and the pressure roller is pressed against the peripheral wall of the new pole piece roll, and the head end of the new pole piece roll, the double-sided adhesive tape and the tail end of the old pole piece roll are clamped between the peripheral wall of the pressure roller and the peripheral wall of the new pole piece roll, so that the tail end of the old pole piece roll and the head end of the new pole piece roll can be firmly bonded together by double-sided adhesive tape.

[0004] However, in the actual operation process, due to various reasons, although the above-mentioned splicing mechanism can improve the bonding strength between the leading end of the new pole sheet material roll and the trailing end of the old pole sheet material roll to a certain extent, there is still the problem that the bonding strength between the leading end of the new pole sheet material roll and the trailing end of the old pole sheet material roll is not strong enough. Utility Model Content

[0005] The present application discloses a tape splicing mechanism, a roll changing device and a battery cell winding device, which can ensure that the tail end of a first old material roll and the head end of a first new material roll can be very firmly bonded together.

[0006] In order to achieve the above objectives, in a first aspect, the present application discloses a belt splicing mechanism, comprising:

[0007] A mounting assembly, the mounting assembly being used to connect with a motion driving member;

[0008] A pressing assembly, the pressing assembly comprising a first pressing member, the first pressing member being connected to the mounting assembly, and the first pressing member being floatable relative to the mounting assembly when subjected to an external force, so as to change a first inclination angle of the first pressing member;

[0009] The motion driving member is used to drive the installation assembly to drive the first pressing member to press against the first new material roll, wherein the first inclination angle is the angle between the first pressing member and the axial direction of the first new material roll.

[0010] In the present application, since the first pressing member can float relative to the mounting assembly when subjected to an external force, after the first pressing member presses the tail end of the first old material roll against the head end of the first new material roll along the floating direction of the first pressing member, assuming that there is a taper on the peripheral wall of the first new material roll, resulting in a gap between the first pressing member and the peripheral wall of the first new material roll, thereby resulting in the overlap between the head end of the first new material roll and the tail end of the first old material roll not being pressed by the pressing roller. At this time, when the motion driving member continues to drive the mounting assembly to drive the first pressing member to move along the floating direction of the first pressing member, the first pressing member will be subjected to a reaction force from the peripheral wall of the first new material roll. Under the reaction force of the peripheral wall of the roll, it can float relative to the mounting assembly, so that the first inclination angle of the first pressing piece changes, and the gap between the first pressing piece and the peripheral wall of the first new material roll is gradually reduced until the first pressing piece fits the peripheral wall of the first new material roll, so that the first pressing piece matches the peripheral wall of the first new material roll. In this way, even if there is a taper on the peripheral wall of the first new material roll, the first pressing piece can still fit well with the peripheral wall of the first new material roll, so that the tail end of the first old material roll and the head end of the first new material roll can be very firmly bonded, thereby solving the problem of insufficient bonding between the tail end of the first old material roll and the head end of the first new material roll.

[0011] Optionally, the first pressing member has a first end and a second end arranged opposite to the first end, and the first end is rotatably connected to the mounting assembly so that the second end can swing relative to the mounting assembly to change the first inclination angle of the first pressing member.

[0012] Optionally, the first pressing member includes:

[0013] A support shaft, wherein two opposite ends of the support shaft are the first end and the second end respectively;

[0014] A bearing, wherein the bearing is sleeved on a peripheral wall of the support shaft;

[0015] A roller sleeve is sleeved on the peripheral wall of the bearing so that the roller sleeve can rotate around the support shaft.

[0016] Optionally, the pressing assembly further includes a guide member, which is disposed on the mounting assembly and is used to guide the second end to swing along a swinging direction of the second end.

[0017] Optionally, a guide groove is provided on the guide member, and the second end is slidably disposed in the guide groove along a swinging direction of the second end.

[0018] Optionally, the pressing assembly further includes an elastic member, wherein the elastic member is respectively connected to the second end and the guide member, and the elastic member is used for providing an elastic force to the second end to swing to an initial position when the external force is cancelled.

[0019] Optionally, the elastic member is located in the guide groove.

[0020] Optionally, the guide member is further provided with an adjusting member which can be reciprocatedly adjusted in a direction approaching or moving away from the elastic member, and the adjusting member abuts against a side of the second end opposite to the elastic member.

[0021] Optionally, at least a portion of the structure of the adjusting member is located in the guide groove.

[0022] Optionally, the pressing component further comprises:

[0023] A clamping drive member, wherein the clamping drive member is disposed on the mounting assembly;

[0024] The clamping member is arranged on the clamping driving member, and the clamping driving member is used to drive the clamping member to move in a direction close to the first pressing member so as to clamp the material strip of the first old material roll between the clamping member and the first pressing member, wherein the floating direction of the first pressing member is different from the driving direction of the clamping driving member.

[0025] Optionally, the pressing component further comprises:

[0026] a second pressing member, the second pressing member is connected to the mounting assembly and is arranged opposite to the first pressing member at a distance, and the clamping driving member is used to drive the clamping member to move toward the first pressing member and the second pressing member at the same time, so as to clamp the material strip of the first waste material roll between the first pressing member and the clamping member, and between the second pressing member and the clamping member;

[0027] A cutting assembly, wherein the cutting assembly comprises a cutter, and the cutter is used to move toward the direction of the material strip between the second pressing member and the first pressing member to cut off the material strip of the first old material roll.

[0028] Optionally, the installation component includes:

[0029] A mounting member, the mounting member being used to connect with the motion driving member;

[0030] A rotating seat, the rotating seat is rotatably arranged on the mounting member around a rotating axis;

[0031] A rotary drive member, the rotary drive member is disposed on the mounting member and connected to the rotary seat;

[0032] The first pressing member and the second pressing member are both connected to the rotating seat, and the rotating driving member is used to drive the rotating seat to rotate around the rotating axis so as to rotate the first pressing member to face the first new material roll.

[0033] Optionally, the second pressure member can float relative to the mounting assembly when subjected to external force to change the second inclination angle of the second pressure member, and the rotary drive member is further used to drive the rotating seat to rotate around the rotating axis to rotate the second pressure member to face the second new material roll, wherein the floating direction of the second pressure member is different from the driving direction of the clamping drive member, and the second inclination angle is the angle between the second pressure member and the axial direction of the second new material roll.

[0034] Optionally, the second pressing member is non-floating relative to the mounting assembly, and the rotary drive member is further used to drive the rotating seat to rotate around the rotating axis to rotate the first pressing member toward the second new material roll.

[0035] In a second aspect, the present application discloses a roll changing device, comprising:

[0036] a first unwinding mechanism, the first unwinding mechanism being used to place the first old material roll or the second new material roll;

[0037] a second unwinding mechanism, the second unwinding mechanism being used for placing the first new material roll or the second old material roll;

[0038] Motion drive parts;

[0039] In the tape splicing mechanism described in any one of the above-mentioned first aspects, the mounting assembly is connected to the motion driving member, and when the first old material roll is placed on the first unwinding mechanism and the first new material roll is placed on the second unwinding mechanism, the motion driving member is used to drive the first pressing member to press the material tape of the first old material roll against the material tape of the first new material roll; when the second new material roll is placed on the first unwinding mechanism and the second old material roll is placed on the second unwinding mechanism, the motion driving member is used to drive the first pressing member to press the material tape of the second old material roll against the material tape of the second new material roll.

[0040] In a third aspect, the present application discloses a battery cell winding device, including the winding changing device described in the second aspect above.

[0041] Compared with the prior art, the beneficial effects of this application are:

[0042] In the present application, since the first pressing member can float relative to the mounting assembly when subjected to an external force, after the first pressing member presses the tail end of the first old material roll against the head end of the first new material roll along the floating direction of the first pressing member, assuming that there is a taper on the peripheral wall of the first new material roll, resulting in a gap between the first pressing member and the peripheral wall of the first new material roll, thereby resulting in the overlap between the head end of the first new material roll and the tail end of the first old material roll not being pressed by the pressing roller. At this time, when the motion driving member continues to drive the mounting assembly to drive the first pressing member to move along the floating direction of the first pressing member, the first pressing member will be subjected to a reaction force from the peripheral wall of the first new material roll. Under the reaction force of the peripheral wall of the roll, it can float relative to the mounting assembly, so that the first inclination angle of the first pressing piece changes, and the gap between the first pressing piece and the peripheral wall of the first new material roll is gradually reduced until the first pressing piece fits the peripheral wall of the first new material roll, so that the first pressing piece matches the peripheral wall of the first new material roll. In this way, even if there is a taper on the peripheral wall of the first new material roll, the first pressing piece can still fit well with the peripheral wall of the first new material roll, so that the tail end of the first old material roll and the head end of the first new material roll can be very firmly bonded, thereby solving the problem of insufficient bonding between the tail end of the first old material roll and the head end of the first new material roll. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] 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.

[0044] Figure 1 It is a structural schematic diagram of a battery cell winding device provided in an embodiment of the present application;

[0045] Figure 2 yes Figure 1 A schematic diagram of the structure of the battery cell winding device when the head end of the first new material roll and the tail end of the first old material roll are spliced ​​with each other;

[0046] Figure 3 yes Figure 2 A schematic diagram of the structure of the first new material roll and the first pressing member when viewed from above (the first new material roll has no taper);

[0047] Figure 4 yes Figure 2 A schematic diagram of the structure of the first new material roll and the first pressing member when viewed from above (the first new material roll has a taper);

[0048] Figure 5 yes Figure 2 A schematic diagram of the structure of the tape splicing mechanism in the battery cell winding equipment;

[0049] Figure 6 yes Figure 4 A schematic diagram of the structure of the first pressing member and the first new material roll before and after floating;

[0050] Figure 7 yes Figure 5 A structural schematic diagram of the belt splicing mechanism in the positive direction of the Z axis (part of the structure is omitted);

[0051] Figure 8 yes Figure 7 A cross-sectional view of the belt splicing mechanism along the BB position;

[0052] Fig. 9 yes Figure 2 A schematic structural diagram of a battery cell winding device when the head end of a second new material roll and the tail end of a second old material roll are spliced ​​together.

[0053] Description of main reference numerals

[0054] 1-installation assembly; 11-installation piece;

[0055] 2-pressing assembly; 21-first pressing member; 212-first end; 213-second end; 214-support shaft; 215-roller sleeve; 216-bearing; 217-pin shaft; 22-guide member; 221-guide groove; 222-adjusting member; 23-elastic member; 24-clamping driving member; 25-clamping member; 26-second pressing member; 27-cutting assembly; 271-cutter;

[0056] 3-Swivel seat;

[0057] 4- Rotating drive member;

[0058] 100-tape splicing mechanism; 200-reel changing device; 201-first unwinding mechanism; 202-second unwinding mechanism; 203-motion driving member; 300-cell winding device;

[0059] a1-first tilt angle; D-battery cell; F1-floating direction of the first pressing member; J1-first old material roll; J2-second old material roll; M-double-sided tape; N-adhesive piece; P-pole piece; S-head end; W-tail end; X1-first new material roll; X2-second new material roll; Z-winding needle. DETAILED DESCRIPTION

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] Before explaining the technical solution of the present application, the inventive concept of the present application is first explained.

[0066] See also Figure 1 The battery cell winding device 300 is a device for stacking and winding the pole piece P and the separator according to a certain rule to form a battery cell D. Specifically, see Figure 1The battery cell winding device 300 generally includes a winding needle Z, an unwinding mechanism and a tape connection mechanism 100. The unwinding mechanism includes a first unwinding mechanism 201 and a second unwinding mechanism 202. The first unwinding mechanism 201 is provided with a first old material roll J1, and the second unwinding mechanism 202 is provided with a first new material roll X1. The first end S of the first new material roll X1 is adhered with a double-sided adhesive tape M. For example, the material roll is a pole piece roll. First, the pole piece P can be unwound to the winding needle Z through the first old material roll J1, so that the winding needle Z can wind the pole piece P unwound from the first old material roll J1 to produce a battery cell D. As the unwinding of the first old material roll J1 proceeds, when the pole piece P in the first old material roll J1 is unwound, refer to Figure 2 The pressure roller Y of the tape splicing mechanism 100 can press the tail end W of the first old material roll J1 against the peripheral wall of the first new material roll X1 (the axial direction of the pressure roller Y is parallel to the axial direction of the first new material roll X1) so that the tail end W of the first old material roll J1, the double-sided tape M and the leading end S of the first new material roll X1 are clamped between the peripheral wall of the first new material roll X1 and the pressure roller Y in sequence. In this way, the leading end S of the first new material roll X1 and the tail end W of the first old material roll J1 can be bonded together by the double-sided tape M.

[0067] See also Figure 3 When the peripheral wall of the first new material roll X1 is relatively flat and there is no taper on the peripheral wall of the first new material roll X1, the extension direction of the element line on the peripheral wall of the first new material roll X1 can be aligned with the axial direction of the pressing roller Y ( Figure 3 The pressure roller Y is parallel to the central Z-axis direction, so that when the pressure roller Y is pressed against the peripheral wall of the first new material roll X1, the pressure roller Y can be completely fitted together with the peripheral wall of the first new material roll X1, thereby ensuring that the tail end W of the first old material roll J1, the double-sided tape M and the leading end S of the first new material roll X1 can be completely pressed between the peripheral wall of the first new material roll X1 and the pressure roller Y, so that the leading end S of the first new material roll X1 and the tail end W of the first old material roll J1 can be firmly bonded together by the double-sided tape M.

[0068] However, in actual scenarios, see Figure 4 It is often the case that the first new material roll X1 has a taper. When the first new material roll X1 has a taper, there will be an angle between the plain line on the circumferential wall of the first new material roll X1 and the axial direction of the pressure roller Y, which will result in a gap between the pressure roller Y and the circumferential wall of the first new material roll X1 when the pressure roller Y is pressed against the circumferential wall of the first new material roll X1, which may result in the overlap between the leading end S of the first new material roll X1 and the tail end of the first old material roll J1 not being pressed by the pressure roller Y, resulting in a problem of loose bonding between the leading end S of the first new material roll X1 and the tail end W of the first old material roll J1.

[0069] Based on this, the present application provides a belt connection mechanism 100 to solve the above problems.

[0070] The technical solution of the present application will be further described below in conjunction with specific embodiments and drawings.

[0071] See also Figure 2 , Figure 5 and Figure 6 The belt connecting mechanism 100 includes a mounting assembly 1 and a pressing assembly 2, wherein the mounting assembly 1 is used to connect with the motion driving member 203, and the pressing assembly 2 includes a first pressing member 21, which is connected to the mounting assembly 1, and the first pressing member 21 can float relative to the mounting assembly 1 when subjected to external force ( Figure 5 and Figure 6 The first pressing member 21 can float along the X-axis direction), see Figure 6 , so as to change the first inclination angle a1 ( Figure 6 The middle dotted line is the first pressing member 21 after the first tilt angle a1 is changed. The motion driving member 203 is used to drive the installation assembly 1 to move toward the direction close to the first new material roll X1, so as to drive the first pressing member 21 to press the tail end W of the first old material roll J1 against the head end S of the first new material roll X1 along the floating direction F1 of the first pressing member 21, wherein the first tilt angle a1 is the axial direction of the first pressing member 21 and the first new material roll X1 ( Figure 6 An adhesive member N is provided between the leading end S of the first new material roll X1 and the trailing end W of the first old material roll J1.

[0072] In this embodiment, when it is necessary to adhere the tail end W of the first old material roll J1 to the head end S of the first new material roll X1, first, any possible adhesive member N such as double-sided tape M can be set on the head end S of the first new material roll X1, and then, the installation component 1 can be driven by the motion driving member 203 to move in the direction close to the first new material roll X1, so as to drive the first pressing member 21 to press the tail end W of the first old material roll J1 against the head end S of the first new material roll X1 along the floating direction F1 of the first pressing member 21. Since an adhesive member N is set between the head end S of the first new material roll X1 and the tail end W of the first old material roll J1, after the first pressing member of the first pressing member 21 presses the tail end W of the first old material roll J1 against the head end S of the first new material roll X1 along the floating direction F1 of the first pressing member 21, the tail end W of the first old material roll J1 will be bonded to the head end S of the first new material roll X1 through the adhesive member N, thereby achieving the purpose of splicing.

[0073] Since the first pressing member can float relative to the mounting assembly 1 when subjected to an external force, after the first pressing member 21 presses the tail end W of the first old material roll J1 against the head end S of the first new material roll X1 along the floating direction F1 of the first pressing member 21, assuming that there is a taper on the peripheral wall of the first new material roll X1, resulting in a gap between the first pressing member 21 and the peripheral wall of the first new material roll X1, thereby resulting in the overlap between the head end S of the first new material roll X1 and the tail end of the first old material roll J1 not being pressed by the pressing roller Y. At this time, when the motion driving member 203 continues to drive the mounting assembly 1 to drive the first pressing member 21 to move along the floating direction F1 of the first pressing member 21, the first pressing member 21 will be subjected to a reaction force from the peripheral wall of the first new material roll X1, and the first pressing member will be 1 can float relative to the mounting assembly 1 under the reaction force of the peripheral wall of the first new material roll X1, so that the first inclination angle a1 of the first pressing piece 21 changes, and then the gap between the first pressing piece 21 and the peripheral wall of the first new material roll X1 is gradually reduced until the first pressing piece 21 fits against the peripheral wall of the first new material roll X1, so that the first pressing piece 21 matches the peripheral wall of the first new material roll X1. In this way, even if the peripheral wall of the first new material roll X1 has a taper, the first pressing piece 21 can still fit well with the peripheral wall of the first new material roll X1, and then the tail end W of the first old material roll J1 and the head end S of the first new material roll X1 can be very firmly bonded together, thereby solving the problem of insufficient bonding between the tail end W of the first old material roll J1 and the head end S of the first new material roll X1.

[0074] Among them, the above-mentioned material roll can be a pole piece material roll or a diaphragm material roll, etc., which is not limited in this embodiment.

[0075] The above-mentioned installation component 1 can be a plate-shaped structure, a columnar structure or any other possible structure, which is not limited in this embodiment.

[0076] It should be noted that the above-mentioned tail end W can be understood in a broad sense. Specifically, the tail end W can be understood as a section of the strip close to the end surface of the tail end W, rather than just the end surface of the tail end W. Similarly, the above-mentioned head end S can be understood as a section of the strip close to the end surface of the tail end W, rather than just the end surface of the head end S.

[0077] It is worth noting that the above-mentioned method of achieving the purpose of splicing by pressing the tail end W of the first old material roll J1 against the head end S of the first new material roll X1 is only one possible splicing method given in this embodiment. In other possible splicing methods, it can also be achieved by pressing other positions of the material tape in the first old material roll J1 against other positions of the material tape in the first new material roll X1. It only needs to be able to press the material tape of the first new material roll X1 against the material tape of the first old material roll J1 so that the material tape of the first new material roll X1 and the material tape of the first old material roll J1 are spliced ​​together to achieve the purpose of splicing. This embodiment does not limit this.

[0078] In addition, the following description of pressing the tail end W of the first old material roll J1 against the head end S of the first new material roll X1 to achieve tape splicing is only an explanation based on a specific embodiment. Its specific meaning can be referred to the expanded description given in this embodiment and will not be repeated later.

[0079] It should also be noted that when the first pressing member 21 is connected to the mounting assembly 1, in one possible implementation, the middle portion of the first pressing member 21 can be connected to the mounting assembly 1. In another possible implementation, see Figure 5 , Figure 7 and Figure 8 The first pressing member 21 has a first end 212 and a second end 213 arranged opposite to the first end 212. The first end 212 is rotatably connected to the mounting assembly 1 so that the second end 213 can swing relative to the mounting assembly 1 to change the first inclination angle a1 of the first pressing member 21.

[0080] Since the first end 212 is rotatably connected to the mounting component 1 and the second end 213 is arranged opposite to the first end 212, when the first pressure member is subjected to the reaction force from the peripheral wall of the first new material roll X1, the first pressure member 21 can form a lever-like structure, and the connection between the first end 212 and the mounting component 1 is the origin of the lever. In this way, even if the reaction force from the peripheral wall of the first new material roll X1 received by the first pressure member is small, the second end 213 can still swing relative to the mounting component 1 using the lever principle, thereby achieving the purpose of saving effort.

[0081] In some embodiments, see Figure 2 and Figure 5 The first pressing member 21 may be a roller. When the first pressing member 21 is a roller, in some embodiments, see Figure 5 , Figure 7 and Figure 8 The first pressing member 21 includes a support shaft 214, a roller sleeve 215 and a bearing 216. The two ends of the support shaft 214 are the first end 212 and the second end 213 respectively. The bearing 216 is sleeved on the peripheral wall of the support shaft 214, and the roller sleeve 215 is sleeved on the peripheral wall of the bearing 216 so that the roller sleeve 215 can rotate around the support shaft 214.

[0082] Since the roller sleeve 215 has the ability to rotate axially around the support shaft 214, when the roller wall of the roller sleeve 215 is pressed against the peripheral wall of the first new material roll X1, assuming that due to an accident, relative sliding occurs between the first pressing member 21 and the peripheral wall of the first new material roll X1, at this time, under the action of the bearing 216, the friction between the first pressing member 21 and the peripheral wall of the first new material roll X1 can be changed from static friction to rolling friction, thereby reducing the friction force between the first pressing member 21 and the peripheral wall of the first new material roll X1, thereby avoiding the peripheral wall of the first new material roll X1 or the first pressing member 21 from being damaged due to friction.

[0083] Among them, see Figure 5 and Figure 8 The first end 212 may be rotatably connected to the mounting assembly 1 via a pin 217. Of course, the first end 212 may also be rotatably connected to the mounting assembly 1 via other methods, which is not limited in this embodiment.

[0084] In order to make the second end 213 swing more smoothly relative to the mounting assembly 1, in some embodiments, see Figure 5 The pressing assembly 2 further includes a guide member 22 , which is disposed on the mounting assembly 1 , and is used to guide the second end 213 to swing along a swinging direction of the second end 213 .

[0085] By providing the guide member 22, under the guiding action of the guide member, on the one hand, the second end 213 can swing more smoothly relative to the mounting assembly 1, and on the other hand, the guide member can also prevent the second end from being suspended in the air, making the structure of the first pressing member 21 more solid and durable.

[0086] There are many ways for the guide member 22 to guide the second end 213 to swing along the swing direction of the second end 213. In one possible implementation, see Figure 5 and Figure 7 A guide groove 221 is provided on the guide member 22 , and the second end 213 is reciprocatingly slidably disposed in the guide groove 221 along the swinging direction of the second end 213 .

[0087] It can be seen that the cooperation between the guide groove 221 and the second end 213 can achieve the purpose of guiding the second end 213 to slide along the swinging direction of the second end 213, and the guiding method is simple, so the cost of the belt connecting mechanism 100 can be reduced.

[0088] In some embodiments, see Figure 5 and Figure 7 The pressing assembly 2 further includes an elastic member 23, which is respectively connected to the second end 213 and the guide member 22, and is used to provide elastic force to the second end 213 to swing to an initial position when the external force is cancelled.

[0089] By providing the elastic member 23 , elastic force can be provided to the second end 213 to swing to the initial position when the external force is removed, so as to prepare in advance for the next use of the first pressing member 21 .

[0090] It should be noted that the elastic member 23 may be a spring, or a spring sheet, or other possible elastic members 23 , and the elastic member 23 is not limited in this embodiment.

[0091] When the elastic member 23 is a spring, the elastic member 23 may be a compression spring or a tension spring, which is not limited in this embodiment.

[0092] In some embodiments, see Figure 7 , the elastic member 23 is located in the guide groove 221 .

[0093] By locating the elastic member 23 in the guide groove 221 , the guide member 22 can wrap the elastic member 23 , so that the elastic member 23 can be free from or less affected by the external environment, thereby making the elastic member 23 run more stably.

[0094] Of course, the elastic member 23 may also be located outside the guide groove 221 , which is not limited in this embodiment.

[0095] In some embodiments, see Figure 7 The guide member 22 is also provided with an adjusting member 222 which can be reciprocatedly adjusted in a direction close to or away from the elastic member 23 , and the adjusting member 222 abuts against a side of the second end 213 opposite to the elastic member 23 .

[0096] Since the adjusting member 222 abuts against the side of the second end 213 opposite to the elastic member 23 and the adjusting member 222 can be reciprocated along the direction approaching or moving away from the elastic member 23, the purpose of adjusting the swing amplitude of the second end 213 can be achieved by reciprocatingly adjusting the adjusting member 222 along the direction approaching or moving away from the elastic member 23, so that the swing stroke of the second end 213 can be controlled.

[0097] The adjusting member 222 may be an adjusting screw or other possible structures, which is not limited in this embodiment.

[0098] In some embodiments, see Figure 7 At least a portion of the structure of the adjusting member 222 is located in the guide groove 221 .

[0099] By locating at least part of the structure of the adjusting member 222 in the guide groove 221, on the one hand, the environment in which the adjusting member 222 is located can be relatively closed, so that the adjusting member 222 can be free from or less affected by the interference of the external environment, so that the operation of the adjusting member 222 can be more stable. On the other hand, the adjusting member 222 can make full use of the space in the guide groove 221, making the belt connecting mechanism 100 more compact.

[0100] Of course, the adjusting member 222 may also be located outside the guide groove 221 , which is not limited in this embodiment.

[0101] It should be noted that the shape of the guide groove 221 may be rectangular, square or other possible shapes, and the shape of the guide groove 221 is not limited in this embodiment.

[0102] In some embodiments, see Figure 2 and Figure 5 The pressing component 2 also includes: a clamping drive member 24 and a clamping member 25, wherein the clamping drive member 24 is arranged on the installation component 1, and the clamping member 25 is arranged on the clamping drive member 24, and the clamping drive member 24 is used to drive the clamping member 25 to move in the direction close to the first pressing member 21, so as to clamp the tail end W of the first old material roll J1 between the clamping member 25 and the first pressing member 21, and the movement drive member 203 is used to drive the installation component 1 to move in the direction close to the first new material roll X1, driving the tail end W of the first old material roll J1 to move to the head end S of the first new material roll X1, so that the first pressing member 21 can press the tail end W of the first old material roll J1 against the head end S of the first new material roll X1 along the floating direction F1 of the first pressing member, wherein the floating direction F1 of the first pressing member is different from the driving direction of the clamping drive member 24.

[0103] Since the floating direction F1 of the first pressure member is different from the driving direction of the clamping drive member 24, it can be ensured that when the clamping drive member 24 drives the clamping member 25 to move toward the direction close to the first pressure member 21 to clamp the tail end W of the first old material roll J1 between the clamping member 25 and the first pressure member 21, the first pressure member 21 will not float in the driving direction of the holding drive member 24, so as to ensure that the tail end W of the first old material roll J1 can be tightly clamped between the clamping member 25 and the first pressure member 21.

[0104] When the pressing component 2 also includes a clamping drive member 24 and a clamping member 25, through the mutual cooperation between the clamping member 25, the first pressing member 21, the clamping drive member 24 and the moving drive member 203, the tail end W of the first old material roll J1 can be clamped between the clamping member 25 and the first pressing member 21, and the tail end W of the first old material roll J1 can be driven to move to the head end S of the first new material roll X1. The pressing component 2 also integrates the function of driving the tail end W of the first old material roll J1 to the head end S of the first new material roll X1, and there is no need to specially set up a structure for driving the tail end W of the first old material roll J1 to the head end S of the first new material roll X1. Therefore, the structure of the entire belt splicing mechanism 100 can be simplified and the cost of the belt splicing mechanism 100 can be reduced.

[0105] In addition, it can be known from the above description that the first pressing member 21 can not only press the leading end S of the first new material roll X1 against the trailing end W of the first old material roll J1 so that the leading end S of the first new material roll X1 is bonded to the trailing end W of the first old material roll J1, but also cooperate with the clamping member 25 to clamp the trailing end W of the first old material roll J1 between the first pressing member 21 and the clamping member 25 and drive the trailing end W of the first old material roll J1 to the leading end S of the first new material roll X1. The first pressing member 21 can be used for multiple purposes and can further simplify the structure of the entire splicing mechanism 100 and reduce the cost of the splicing mechanism 100.

[0106] It is worth noting that in order to ensure that the clamping drive member 24 can clamp the material strip of the first old material roll J1 between the clamping member 25 and the first pressing member 21 when driving the clamping member 25 to move toward the first pressing member 21, see Fig. 9 First, the installation assembly 1 can be driven by the motion drive member 203 along the width direction of the material strip ( Fig. 9 The negative direction of the center Z axis) causes the material strip to enter the gap between the clamping member 25 and the first pressing member 21, and then the clamping member 25 is driven by the clamping driving member 24 to move in the direction close to the first pressing member 21, which can ensure that the material strip of the first old material roll J1 can be clamped between the clamping member 25 and the first pressing member 21.

[0107] It should be noted that the clamping drive member 24 may be a cylinder, an electric cylinder or a motor, etc., and the present embodiment does not limit the clamping drive member 24 .

[0108] The clamping member 25 may be a clamping plate or any other possible structure, which is not limited in this embodiment.

[0109] In some embodiments, see Figure 2 and Figure 5The pressing assembly 2 also includes: a second pressing member 26 and a cutting assembly 27, wherein the second pressing member 26 is connected to the mounting assembly 1 and is arranged opposite to the first pressing member 21 at a distance, and the clamping driving member 24 is used to drive the clamping member 25 to move simultaneously in a direction close to the first pressing member 21 and the second pressing member 26, so as to clamp the material strip of the first old material roll J1 between the first pressing member 21 and the clamping member 25, and between the second pressing member 26 and the clamping member 25, respectively, and the cutting assembly 27 includes a cutter 271, which is used to move in a direction close to the first pressing member 21 and the material strip between the first pressing member 21 until the material strip of the first old material roll J1 is cut off, so that the first old material roll J1 forms the tail end W of the first old material roll J1 located downstream of the cutting assembly 27.

[0110] In this embodiment, when the clamping driving member 24 drives the clamping member 25 to move towards the direction approaching the first pressure member 21 and the second pressure member 26 at the same time, the material strip of the first old material roll J1 can be clamped between the first pressure member 21 and the clamping member 25, and between the second pressure member 26 and the clamping member 25, respectively. Since the second pressure member 26 is connected to the mounting assembly 1 and is arranged relative to the first pressure member 21 at a distance, the material strip between the second pressure member 26 and the first pressure member 21 will be fixed from both sides by the second pressure member 26 and the first pressure member 21, respectively, so that the material strip is tightened.

[0111] When the material tape is fixed from both sides by the second pressure piece 26 and the first pressure piece 21 respectively so that the material tape is taut, when the cutter 271 is moved toward the first pressure piece 21 and the direction of the material tape between the first pressure piece 21 until the material tape of the first old material roll J1 is cut off, the cutter 271 will not be unable to cut the material tape due to the material tape being loose.

[0112] The structure of the second pressing member 26 is the same as or similar to that of the first pressing member 21 . For details, reference may be made to the description of the second pressing member 26 in the above embodiment, which will not be described in detail in this embodiment.

[0113] In some embodiments, see Figure 2 and Figure 5The mounting assembly 1 comprises: a mounting member 11, a rotating seat 3 and a rotating driving member 4, wherein the mounting member 11 is used to connect with the motion driving member 203, the rotating seat 3 is rotatably arranged on the mounting member 11 around the rotating axis, the rotating driving member 4 is arranged on the mounting member 11 and connected with the rotating seat 3, the first pressing member 21 and the second pressing member 26 are both connected to the rotating seat 3, the rotating driving member 4 is used to drive the rotating seat 3 to rotate around the rotating axis to rotate the first pressing member to face the first new material roll X1, and the moving driving member 203 is used to drive the mounting assembly 1 to move in the direction close to the first new material roll X1, so as to drive the first pressing member facing the first new material roll X1 to press the tail end W of the first old material roll J1 against the head end S of the first new material roll X1.

[0114] Since the first pressure member 21 is arranged on the rotating seat 3, when the rotating driving member 4 drives the rotating seat 3 to rotate around the rotating axis, it can drive the first pressure member 21 arranged on the rotating seat 3 to rotate synchronously, and then the purpose of rotating the first pressure member to face the first new material roll X1 can be achieved. After the first pressure member rotates to face the first new material roll X1, when the moving driving member 203 drives the installation component 1 to move in the direction close to the first new material roll X1, the purpose of driving the first pressure member facing the first new material roll X1 along the floating direction F1 of the first pressure member to press the tail end W of the first old material roll J1 against the head end S of the first new material roll X1 can be achieved.

[0115] It can be seen that by setting the pressing assembly 2 on the rotating seat 3, the direction of the first pressing member can be flexibly adjusted so that the first pressing member can be directed toward the first new material roll X1. Therefore, the situation where the first pressing member is directed in the wrong direction can be avoided, and the first pressing member can be further ensured to be better matched with the peripheral wall of the first new material roll X1, so that the tail end W of the first old material roll J1 and the head end S of the first new material roll X1 can be bonded more securely.

[0116] The above-mentioned rotating driving member 4 can be a motor, and the motor can be connected to the rotating seat 3 through a pulley structure to achieve the purpose of driving the rotating seat 3 to rotate around the rotating axis. Of course, the rotating driving member 4 can also be other possible driving members, and the rotating driving member 4 can also be connected to the rotating seat 3 in other possible ways, which is not limited in this embodiment.

[0117] In some embodiments, see Figure 5 and Fig. 9The second pressing member 26 can float relative to the mounting assembly 1 when subjected to external force to change the second inclination angle of the second pressing member 26. The rotating drive member 4 is also used to drive the rotating seat 3 to rotate around the rotating axis to rotate the second pressing member 26 to face the second new material roll X2. The moving drive member 203 is also used to drive the mounting assembly 1 to move in the direction close to the second new material roll X2 to drive the second pressing member 26 facing the second new material roll X2 to press the tail end W of the second old material roll J2 against the head end S of the second new material roll X2 along the floating direction of the second pressing member 26, wherein the floating direction of the second pressing member 26 is different from the driving direction of the clamping drive member 24, the second inclination angle is the angle between the second pressing member 26 and the axial direction of the second new material roll X2, and an adhesive member N is arranged between the head end S of the second new material roll X2 and the tail end W of the second old material roll J2.

[0118] Among them, when the second pressing member 26 is floatable relative to the mounting assembly 1 when subjected to external force, its specific structure has the same or similar effect as the first pressing member 21 being floatable when subjected to external force, and this embodiment will not be repeated here.

[0119] In some embodiments, the second pressure member 26 is non-floating relative to the mounting assembly 1. When the second pressure member 26 is non-floating relative to the mounting assembly 1, the second pressure member 26 will not have a floating function. In order to ensure the bonding reliability between the tail end W of the second old material roll J2 and the head end of the second new material roll X2, in some embodiments, the rotating drive member 4 is also used to drive the rotating seat 3 to rotate around the rotating axis to rotate the first pressure member toward the second new material roll X2. The motion drive member 203 is also used to drive the mounting assembly 1 to move in a direction close to the second new material roll X2, so as to drive the first pressure member toward the second new material roll X2 to press the tail end W of the second old material roll J2 against the head end S of the second new material roll X2 along the floating direction F1 of the first pressure member.

[0120] In this way, under the action of the rotating driving member 4, the first pressing member can be rotated to face the second new material roll X2, so that the tail end W of the second old material roll J2 can be pressed against the head end S of the second new material roll X2 by the first pressing member. Since the first pressing member has a floating function, the reliability of the bonding between the tail end of the second old material roll J2 and the head end S of the second new material roll X2 can be guaranteed.

[0121] The present application provides a roll changing device 200, see Figure 2 and Fig. 9The roll changing device 200 includes: a first unwinding mechanism 201, a second unwinding mechanism 202, a motion driving member 203 and a belt connecting mechanism 100, wherein the first unwinding mechanism 201 is used to place the first old material roll J1 or the second new material roll X2, the first old material roll J1 has a tail end W, and the second new material roll X2 has a head end S, the second unwinding mechanism 202 is used to place the first new material roll X1 or the second old material roll J2, the first new material roll X1 has a head end S, and the second old material roll J2 has a tail end W, the mounting assembly 1 is connected to the motion driving member 203, see Figure 2 When the first unwinding mechanism 201 is provided with the first old material roll J1 and the second unwinding mechanism 202 is provided with the first new material roll X1, the motion driving member 203 is used to drive the mounting assembly 1 to move toward the first new material roll X1, so as to drive the first pressing member 21 to press the tail end W of the first old material roll J1 against the head end S of the first new material roll X1 along the floating direction F1 of the first pressing member 21; see Fig. 9 When the second new material roll X2 is placed on the first unwinding mechanism 201 and the second old material roll J2 is placed on the second unwinding mechanism 202, the motion driving member 203 is used to drive the installation component 1 to move toward the direction close to the second new material roll X2, so as to drive the first pressing member 21 to press the tail end W of the second old material roll J2 against the head end S of the second new material roll X2 along the floating direction F1 of the first pressing member 21.

[0122] Among them, the structure of the connecting mechanism 100 can be the same as the structure of the connecting mechanism 100 described in any of the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description of the connecting mechanism 100 in the above embodiments, which will not be repeated in this embodiment.

[0123] It should be noted that, in a possible understanding, the first new material roll X1 can be called the second old material roll J2 after unwinding.

[0124] In this embodiment, since the belt splicing mechanism 100 can make the tail end W of the first old material roll J1 and the head end S of the first new material roll X1 very firmly bonded together, when the roll changing device 200 includes the belt splicing mechanism 100, the tail end W of the first old material roll J1 and the head end S of the first new material roll X1 can be very firmly bonded together, and the tail end W of the second old material roll J2 and the head end S of the second new material roll X2 can be very firmly bonded together.

[0125] The present application also provides a battery cell winding device 300, see Fig. 9 The battery cell winding device 300 includes a winding changing device 200 .

[0126] Among them, the structure of the roll changing device 200 can be the same as the structure of the roll changing device 200 described in the above embodiment, and can bring the same or similar beneficial effects. For details, please refer to the description of the roll changing device 200 in the above embodiment, which will not be repeated in this embodiment.

[0127] The motion driving member 203 may be a motor or any other possible driving member, which is not limited in this embodiment.

[0128] In this embodiment, since the roll changing device 200 can make the tail end W of the first old material roll J1 and the head end S of the first new material roll X1 very firmly bonded together, it can also make the tail end W of the second old material roll J2 and the head end S of the second new material roll X2 very firmly bonded together. Based on this, when the battery cell winding equipment 300 includes the roll changing device 200, the quality of the battery cell prepared by the battery cell winding equipment 300 can be better.

[0129] 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 belt splicing mechanism (100), characterized in that: include: A mounting assembly (1), wherein the mounting assembly (1) is used to be connected to a motion driving member (203); A pressing assembly (2), the pressing assembly (2) comprising a first pressing member (21), the first pressing member (21) being connected to the mounting assembly (1), and the first pressing member (21) being floatable relative to the mounting assembly (1) when subjected to an external force, so as to change a first inclination angle (a1) of the first pressing member (21); The motion driving member (203) is used to drive the installation assembly (1) to drive the first pressing member (21) to press against the first new material roll (X1), wherein the first inclination angle (a1) is the angle between the first pressing member (21) and the axial direction of the first new material roll (X1).

2. The belt splicing mechanism (100) according to claim 1, characterized in that: The first pressing member (21) comprises a first end (212) and a second end (213) arranged opposite to the first end (212); the first end (212) is rotatably connected to the mounting assembly (1) so that the second end (213) can swing relative to the mounting assembly (1) to change the first inclination angle (a1) of the first pressing member (21).

3. The belt splicing mechanism (100) according to claim 2, characterized in that: The first pressing member (21) comprises: A support shaft (214), wherein two opposite ends of the support shaft (214) are respectively the first end (212) and the second end (213); A bearing (216), wherein the bearing (216) is sleeved on a peripheral wall of the support shaft (214); A roller sleeve (215), wherein the roller sleeve (215) is sleeved on the peripheral wall of the bearing (216) so that the roller sleeve (215) can rotate around the support shaft (214).

4. The belt splicing mechanism (100) according to claim 2, characterized in that: The pressing assembly (2) further comprises a guide member (22), wherein the guide member (22) is arranged on the mounting assembly (1), and the guide member (22) is used to guide the second end (213) to swing along a swinging direction of the second end (213).

5. The belt splicing mechanism (100) according to claim 4, characterized in that: The guide member (22) is provided with a guide groove (221), and the second end (213) is slidably arranged in the guide groove (221) along the swinging direction of the second end (213).

6. The belt splicing mechanism (100) according to claim 5, characterized in that: The pressing assembly (2) further comprises an elastic member (23), wherein the elastic member (23) is respectively connected to the second end (213) and the guide member (22), and the elastic member (23) is used to provide an elastic force to the second end (213) to swing to an initial position when the external force is cancelled.

7. The belt splicing mechanism (100) according to claim 6, characterized in that: The elastic member (23) is located in the guide groove (221).

8. The belt splicing mechanism (100) according to claim 6, characterized in that: The guide member (22) is also provided with an adjusting member (222) that can be reciprocated and adjusted in a direction approaching or moving away from the elastic member (23), and the adjusting member (222) abuts against a side of the second end (213) opposite to the elastic member (23).

9. The belt splicing mechanism (100) according to claim 8, characterized in that: At least a portion of the structure of the adjusting member (222) is located in the guide groove (221).

10. The belt splicing mechanism (100) according to any one of claims 1 to 9, characterized in that: The pressing component (2) further comprises: A clamping drive member (24), wherein the clamping drive member (24) is arranged on the mounting assembly (1); A clamping member (25), wherein the clamping member (25) is arranged on the clamping driving member (24), and the clamping driving member (24) is used to drive the clamping member (25) to move in a direction close to the first pressing member (21) so as to clamp the material strip of the first old material roll (J1) between the clamping member (25) and the first pressing member (21), wherein the floating direction (F1) of the first pressing member (21) is different from the driving direction of the clamping driving member (24).

11. The belt splicing mechanism (100) according to claim 10, characterized in that: The pressing component (2) further comprises: a second pressing member (26), the second pressing member (26) being connected to the mounting assembly (1) and being arranged opposite to the first pressing member (21) at a distance, the clamping driving member (24) being used to drive the clamping member (25) to move simultaneously in a direction close to the first pressing member (21) and the second pressing member (26), so as to clamp the material strip of the first waste material roll (J1) between the first pressing member (21) and the clamping member (25), and between the second pressing member (26) and the clamping member (25); A cutting assembly (27), wherein the cutting assembly (27) comprises a cutter (271), wherein the cutter (271) is used to move in a direction close to the material strip between the second pressing member (26) and the first pressing member (21) so as to cut off the material strip of the first old material roll (J1).

12. The belt splicing mechanism (100) according to claim 11, characterized in that: The installation component (1) comprises: A mounting member (11), the mounting member (11) being used to be connected to the motion driving member (203); A rotating seat (3), the rotating seat (3) being rotatably arranged on the mounting member (11) around a rotating axis; A rotating driving member (4), wherein the rotating driving member (4) is disposed on the mounting member (11) and connected to the rotating seat (3); The first pressing member (21) and the second pressing member (26) are both connected to the rotating seat (3), and the rotating driving member (4) is used to drive the rotating seat (3) to rotate around the rotating axis so as to rotate the first pressing member (21) toward the first new material roll (X1).

13. The belt splicing mechanism (100) according to claim 12, characterized in that: The second pressure member (26) can float relative to the mounting assembly (1) when subjected to external force so as to change the second inclination angle of the second pressure member (26). The rotary drive member (4) is also used to drive the rotary seat (3) to rotate around the rotary axis so as to rotate the second pressure member (26) toward the second new material roll (X2), wherein the floating direction of the second pressure member (26) is different from the driving direction of the clamping drive member (24), and the second inclination angle is the angle between the second pressure member (26) and the axial direction of the second new material roll (X2).

14. The belt splicing mechanism (100) according to claim 12, characterized in that: The second pressing member (26) is non-floating relative to the mounting assembly (1), and the rotary drive member (4) is also used to drive the rotating seat (3) to rotate around the rotating axis to rotate the first pressing member (21) toward the second new material roll (X2).

15. A roll changing device (200), characterized in that: include: A first unwinding mechanism (201), the first unwinding mechanism (201) being used to place a first old material roll (J1) or a second new material roll (X2); A second unwinding mechanism (202), the second unwinding mechanism (202) being used to place the first new material roll (X1) or the second old material roll (J2); A motion driving member (203); The tape splicing mechanism (100) described in any one of claims 1 to 14, wherein the mounting assembly (1) is connected to the motion driving member (203); when the first old material roll (J1) is placed on the first unwinding mechanism (201) and the first new material roll (X1) is placed on the second unwinding mechanism (202), the motion driving member (203) is used to drive the first pressing member (21) to press the material tape of the first old material roll (J1) against the material tape of the first new material roll (X1); when the second new material roll (X2) is placed on the first unwinding mechanism (201) and the second old material roll (J2) is placed on the second unwinding mechanism (202), the motion driving member (203) is used to drive the first pressing member (21) to press the material tape of the second old material roll (J2) against the material tape of the second new material roll (X2).

16. A battery cell winding device (300), characterized in that: It comprises the roll changing device (200) as claimed in claim 15.

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