阅读说明：本技术 一种复卷机 (Rewinding machine ) 是由 李迪武 江俊锋 李恒 梁荣斌 徐波 于 2020-05-26 设计创作，主要内容包括：本发明涉及电池制造技术领域,公开一种复卷机,包括：机体,机体上转动连接有放卷轴,用于放置未经分选的卷状极片带；机体上设有位于放卷轴下游的分选装置,放卷轴放出的极片带穿设通过分选装置,分选装置能够将极片带识别为合格极片带和不合格极片带；连接于机体上的第一接带平台和第二接带平台,合格极片带穿设通过第一接带平台,不合格极片带穿设通过第二接带平台；间隔设置的第一收卷轴和第二收卷轴,第一收卷轴和第二收卷轴均转动连接于机体上,合格极片带连接卷绕于第一收卷轴上,不合格极片带连接卷绕于第二收卷轴上。通过上述结构,该复卷机能够提高极片带的分选效率。(The invention relates to the technical field of battery manufacturing, and discloses a rewinding machine, which comprises: the machine body is rotatably connected with a unreeling shaft and is used for placing unsorted coiled pole piece belts; the machine body is provided with a sorting device positioned at the downstream of the unwinding shaft, the pole piece belts paid out by the unwinding shaft penetrate through the sorting device, and the sorting device can identify the pole piece belts as qualified pole piece belts and unqualified pole piece belts; the first belt splicing platform and the second belt splicing platform are connected to the machine body, qualified pole piece belts penetrate through the first belt splicing platform, and unqualified pole piece belts penetrate through the second belt splicing platform; the first winding shaft and the second winding shaft are arranged at intervals, the first winding shaft and the second winding shaft are rotatably connected to the machine body, the qualified pole piece strips are connected and wound on the first winding shaft, and the unqualified pole piece strips are connected and wound on the second winding shaft. Through the structure, the rewinding machine can improve the separation efficiency of the pole piece belts.)

1. A rewinding machine characterized by comprising:

the separator comprises a machine body (1), wherein a unreeling shaft (2) is rotatably connected to the machine body (1), and the unreeling shaft (2) is used for placing unsorted coiled pole piece tapes; the machine body (1) is provided with a sorting device (3), the pole piece belts discharged by the unwinding shaft (2) penetrate through the sorting device (3), and the sorting device (3) can identify the pole piece belts as qualified pole piece belts and unqualified pole piece belts;

the first belt connecting platform (41), the first belt connecting platform (41) is connected to the machine body (1), and the qualified pole piece belt penetrates through the first belt connecting platform (41);

the second belt connecting platform (42) is connected to the machine body (1) and arranged at intervals with the first belt connecting platform (41), and the unqualified pole piece belt penetrates through the second belt connecting platform (42);

the first winding shaft (51), the first winding shaft (51) is rotatably connected to the machine body (1), and the qualified pole piece strip is wound on the first winding shaft (51) in a connecting manner;

the second winding shaft (52) and the first winding shaft (51) are arranged at intervals, the second winding shaft (52) is rotatably connected to the machine body (1), and the unqualified pole piece strip is connected and wound on the second winding shaft (52).

2. The rewinding machine as claimed in claim 1, characterized by further comprising a first pressure roller (53) and a second pressure roller (54), said first pressure roller (53) and said second pressure roller (54) being spaced apart, said first pressure roller (53) pressing flat the band of acceptable pole pieces on said first winding shaft (51), said second pressure roller (54) pressing flat the band of unacceptable pole pieces on said second winding shaft (52).

3. The rewinding machine as claimed in claim 2, characterized by further comprising a first pressure bar (55) and a second pressure bar (56), said first pressure bar (55) and said second pressure bar (56) being arranged at intervals, one end of said first pressure bar (55) being rotatably connected to said machine body (1), said first pressure roller (53) being rotatably connected to the other end of said first pressure bar (55); one end of the second pressure rod (56) is rotatably connected to the machine body (1), and the second pressure rod (54) is rotatably connected to the other end of the second pressure rod (56).

4. A rewinding machine as claimed in claim 1, characterized by further comprising a deviation correction mechanism (6), said deviation correction mechanism (6) being arranged between said unwinding shaft (2) and said sorting device (3), said strip passing through said deviation correction mechanism (6).

5. The rewinding machine as claimed in claim 4, characterized in that said deviation rectifying mechanism (6) comprises two guiding rollers (61) and two limiting plates (62), said two limiting plates (62) are arranged oppositely and respectively arranged at two ends of said guiding roller (61), said guiding roller (61) is rotatably connected to said machine body (1), and said pole piece strip abuts against said guiding roller (61).

6. The rewinding machine as claimed in claim 5, characterized in that said deviation correction mechanism (6) further comprises a stop roller (63), said stop roller (63) being connected between two of said stop plates (62), said strip of pole pieces being interposed between said guide roller (61), said stop plates (62) and said stop roller (63).

7. A rewinding machine as claimed in claim 4, characterized by further comprising a tensioning assembly (7), said tensioning assembly (7) being connected to said machine body (1) and being located between said deviation correction mechanism (6) and said first splicing platform (41), said tensioning assembly (7) comprising a first tensioning mechanism (71) and a second tensioning mechanism (72) arranged opposite each other, said first tensioning mechanism (71) and said second tensioning mechanism (72) being located on either side of said pole piece tape, said pole piece tape being sandwiched between said first tensioning mechanism (71) and said second tensioning mechanism (72).

8. The rewinding machine as claimed in claim 7, characterized in that said first tensioning mechanism (71) comprises a tensioning pressure bar (711) and a first tensioning roller (712), said first tensioning roller (712) being rotatably connected to one end of said tensioning pressure bar (711), the other end of said tensioning pressure bar (711) being rotatably connected to said machine body (1); the second tensioning mechanism (72) comprises a second tensioning roller (721), a third pressing rod (722) and a fourth pressing rod (723), the second tensioning roller (721) is rotatably connected to one end of the third pressing rod (722) and one end of the fourth pressing rod (723), the other end of the third pressing rod (722) is rotatably connected to the machine body (1), the other end of the fourth pressing rod (723) is adjustably connected to the machine body (1), and the pole piece belt is clamped between the first tensioning roller (712) and the second tensioning roller (721).

9. The rewinding machine as claimed in claim 1, characterized in that said sorting device (3) is provided as a CCD camera.

10. The rewinding machine as claimed in claim 1, characterized by further comprising a first guide roller (43) and a second guide roller (44), said first guide roller (43) and said second guide roller (44) being arranged in parallel, said first guide roller (43) being rotatably connected to the outlet of said first splicing platform (41), said first guide roller (43) guiding said accepted pole pieces; the second guide roller (44) is rotatably connected to an outlet of the second belt connecting platform (42), and the second guide roller (44) guides the unqualified pole piece belt.

Technical Field

The invention relates to the technical field of battery manufacturing, in particular to a rewinding machine.

Background

With the strong support of the country for the new energy industry, new energy automobiles become a main trend of future development. This not only makes the market demand for power batteries increasing, but also makes people pay more attention to the quality of the power batteries. Therefore, the quality and production efficiency of the electrode tabs have become a concern for each battery manufacturing enterprise.

At present, in the production process of electrode plates, when the winding of a pole piece belt is uneven or a roll of pole piece belt is doped with a qualified pole piece belt and an unqualified pole piece belt and needs to be selected respectively, the pole piece belt which is in a roll needs to be wound again by a rewinding machine so as to be used for winding the pole piece belt orderly or selecting the unqualified pole piece belt in the roll of the pole piece belt. As shown in fig. 1, an existing rewinding machine generally comprises a winding shaft 1 ', an unwinding shaft 2', a tension control mechanism 3 'and a tape splicing platform 4', and the rewinding machine can ensure the winding regularity of a pole piece tape by adjusting parameters of the tension control mechanism in the rewinding process.

However, because the existing rewinding machine is not provided with the compression roller at the winding shaft, the pole piece strip is easy to generate wavy edges in the winding process, and the improvement of the winding uniformity of the rewinding machine is restricted. In addition, the existing rewinding machine is usually only provided with a tape receiving platform and a set of winding shaft, when the qualified pole piece tapes and the unqualified pole piece tapes are sorted, the qualified winding roll and the unqualified winding roll need to be replaced repeatedly on the winding shaft for winding the qualified pole piece tapes and the unqualified pole piece tapes, so that the pole piece tapes are high in classification labor intensity and low in working efficiency, the risk of collision damage of the material rolls is greatly increased, and unnecessary loss is easily caused.

Disclosure of Invention

The invention aims to provide a rewinding machine which can improve the sorting efficiency of pole piece belts and reduce the labor intensity of pole piece belt sorting.

In order to achieve the purpose, the invention adopts the following technical scheme:

a rewinding machine comprising:

the device comprises a machine body, wherein a unreeling shaft is rotatably connected to the machine body and used for placing unsorted coiled pole piece tapes; the machine body is provided with a sorting device, the pole piece belts discharged by the unwinding shaft penetrate through the sorting device, and the sorting device can identify the pole piece belts as qualified pole piece belts and unqualified pole piece belts;

the first tape splicing platform is connected to the machine body, and the qualified pole piece tape penetrates through the first tape splicing platform;

the second tape splicing platform is connected to the machine body, and the unqualified pole piece tape penetrates through the second tape splicing platform;

the first winding shaft is rotatably connected to the machine body, and the qualified pole piece strip is wound on the first winding shaft in a connecting manner;

and the second winding shaft and the first winding shaft are arranged at intervals, the second winding shaft is rotatably connected to the machine body, and the unqualified pole piece strip is wound on the second winding shaft in a connecting manner.

Preferably, the winding device further comprises a first pressing roller and a second pressing roller, the first pressing roller and the second pressing roller are arranged at intervals, the first pressing roller presses and smoothes the qualified pole piece strips on the first winding shaft, and the second pressing roller presses and smoothes the unqualified pole piece strips on the second winding shaft.

Preferably, the device further comprises a first pressure lever and a second pressure lever, the first pressure lever and the second pressure lever are arranged at intervals, one end of the first pressure lever is rotatably connected to the machine body, and the first pressure roller is rotatably connected to the other end of the first pressure lever; one end of the second pressing rod is rotatably connected to the machine body, and the second pressing roller is rotatably connected to the other end of the second pressing rod.

Preferably, the automatic sorting device further comprises a deviation rectifying mechanism, the deviation rectifying mechanism is arranged between the unreeling shaft and the sorting device, and the pole piece belt penetrates through the deviation rectifying mechanism.

Preferably, the deviation correcting mechanism comprises two guide rollers and two limiting plates, the two limiting plates are arranged oppositely and respectively arranged at two ends of the guide rollers in a blocking manner, the guide rollers are rotationally connected to the machine body, and the pole piece belts are abutted against the guide rollers; .

Preferably, the deviation correcting mechanism further comprises limiting rollers, the limiting rollers are connected between the two limiting plates, and the pole piece belt is arranged among the guide roller, the limiting plates and the limiting rollers.

Preferably, the tension assembly is connected to the machine body and located between the deviation correcting mechanism and the first belt receiving platform, the tension assembly comprises a first tension mechanism and a second tension mechanism which are arranged oppositely, the first tension mechanism and the second tension mechanism are located on two sides of the pole piece belt respectively, and the pole piece belt is clamped between the first tension mechanism and the second tension mechanism.

Preferably, the first tensioning mechanism comprises a tensioning pressure rod and a first tensioning roller, the first tensioning roller is rotatably connected to one end of the tensioning pressure rod, and the other end of the tensioning pressure rod is rotatably connected to the machine body; the second tensioning mechanism comprises a second tensioning roller, a third pressing rod and a fourth pressing rod, the second tensioning roller is rotatably connected with one end of the third pressing rod and one end of the fourth pressing rod, the other end of the third pressing rod is rotatably connected with the machine body, and the other end of the fourth pressing rod is adjustably connected with the machine body.

Preferably, the sorting device is provided as a CCD camera.

Preferably, the device also comprises a first guide roller and a second guide roller, wherein the first guide roller and the second guide roller are arranged in parallel, the first guide roller is rotatably connected to an outlet of the first belt splicing platform, and the first guide roller guides the qualified pole piece belt; the second guide roller is rotatably connected to an outlet of the second belt connecting platform, and the second guide roller guides the unqualified pole piece belt.

The invention has the beneficial effects that:

the invention provides a rewinding machine which comprises an unwinding shaft, a sorting device, a first tape receiving platform, a second tape receiving platform, a first winding shaft and a second winding shaft, wherein the unwinding shaft is used for placing unsorted rolled pole piece tapes; the unqualified pole piece belt passes through the second belt connecting platform and then is connected and wound on the second winding shaft, and the pole piece belt is wound again by the second winding shaft.

Through the structure, the sorting device identifies the qualified pole piece belts and the unqualified pole piece belts in the pole piece belts, if the pole piece belts are qualified, the pole piece belts pass through the first belt connecting platform and then are wound on the first winding shaft, and if the pole piece belts are unqualified, the pole piece belts pass through the second belt connecting platform and then are wound on the second winding shaft. In the process of rewinding the pole piece strips, if the sorting device detects that the pole piece strips discharged from the unwinding shaft are changed from qualified to unqualified, an operator cuts off the pole piece strips which originally pass through the first strip receiving platform, then the pole piece strips pass through the second strip receiving platform and are wound on the second winding shaft, and rewinding of the unqualified pole piece strips can be realized without replacing the receiving rolls; if the sorting device detects that the pole piece belt discharged from the unwinding shaft is qualified after being disqualified, an operator cuts off the pole piece belt which originally passes through the second belt connecting platform, then the pole piece belt passes through the first belt connecting platform to be wound on the first winding shaft, rewinding of the qualified pole piece belt can be realized without replacing the received material coil, the rewinding machine avoids repeated replacement of the received material coil, and the sorting efficiency of the pole piece belt is improved.

Drawings

Fig. 1 is a schematic structural view of a rewinding machine in the prior art;

fig. 2 is a schematic structural diagram of a rewinding machine according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a first splicing platform and a second splicing platform of a rewinding machine according to an embodiment of the present invention.

In the figure:

1', a winding shaft; 2', unreeling the reel; 3', a tension control mechanism; 4', a tape splicing platform;

1. a body; 2. unwinding the reel; 3. a sorting device; 41. a first splicing platform; 42. a second splicing platform; 43. a first guide roller; 44. a second guide roller; 45. a base plate; 46. a pressure lever; 47. connecting columns; 48. cutting off the groove; 51. a first winding shaft; 52. a second wind-up reel; 53. a first press roll; 54. a second press roll; 55. a first pressure lever; 56. a second compression bar; 6. a deviation rectifying mechanism; 61. a guide roller; 62. a limiting plate; 63. a limiting roller; 7. a tension assembly; 71. a first tensioning mechanism; 711. tensioning the compression bar; 712. a first tension roller; 72. a second tensioning mechanism; 721. a second tension roller; 722. a third compression bar; 723. and a fourth pressure lever.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The embodiment provides a rewinding machine, as shown in fig. 2, the rewinding machine comprises a machine body 1, an unwinding shaft 2, a sorting device 3, a first tape receiving platform 41, a second tape receiving platform 42, a first winding shaft 51 and a second winding shaft 52, the unwinding shaft 2 is rotatably connected to the machine body 1 and is used for placing unsorted rolled pole piece tapes, the sorting device 3, the first tape receiving platform 41, the second tape receiving platform 42, the first winding shaft 51 and the second winding shaft 52 are all connected to the machine body 1, the sorting device 3 is located at the downstream of the unwinding shaft 2, the first tape receiving platform 41 and the second tape receiving platform 42 are located between the sorting device 3 and the winding assembly 5, the pole piece tapes unwound from the unwinding shaft 2 penetrate through the sorting device 3, the sorting device 3 identifies the pole piece tapes as qualified pole piece tapes and unqualified pole piece tapes, the qualified pole piece tapes penetrate through the first tape receiving platform 41 and then are connected to the first winding shaft 51, the unqualified pole piece belt penetrates through the second belt connecting platform 42 and is connected and wound on the second winding shaft 52, so that the qualified pole piece belt and the unqualified pole piece belt are respectively wound.

In the present embodiment, the sorting device 3 is located between the unwinding shaft 2 and the first splicing platform 41, the pole piece tape unwound by the unwinding shaft 2 is threaded through the sorting device 3, and the sorting device 3 can identify the pole piece tape as a qualified pole piece tape and an unqualified pole piece tape. Preferably, the sorting device 3 is configured as a CCD camera, and is capable of identifying defects in the pole piece belts through image processing technology, and when the pole piece belts with the defects are identified, the sorting device 3 gives an alarm to distinguish the qualified pole piece belts from the unqualified pole piece belts in the pole piece belts.

Preferably, the second tape splicing platform 42 and the first tape splicing platform 41 are provided with qualified pole piece tapes at intervals to penetrate through the first tape splicing platform 41, and unqualified pole piece tapes penetrate through the second tape splicing platform 42, so that the qualified pole piece tapes and the unqualified pole piece tapes are conveyed downstream through the first tape splicing platform 41 and the second tape splicing platform 42 respectively. Further, the rewinding machine further comprises a first guide roller 43 and a second guide roller 44, the first guide roller 43 and the second guide roller 44 are arranged in parallel, the first guide roller 43 is rotatably connected to an outlet of the first tape splicing platform 41 and is rotatably abutted to the qualified pole piece tapes to guide the conveying of the qualified pole piece tapes, so that the conveying of the qualified pole piece tapes to the downstream is smooth, and the deviation of the qualified pole piece tapes is prevented. The second guide roller 44 is rotatably connected to the outlet of the second belt splicing platform 42 and rotatably abuts against the unqualified pole piece belt to guide the unqualified pole piece belt, so that the unqualified pole piece belt is smoothly conveyed to the downstream, and the deviation of the unqualified pole piece belt is prevented.

Specifically, as shown in fig. 3, the first splicing platform 41 and the second splicing platform 42 are provided to have the same structure. Connect the area platform to include bottom plate 45, depression bar 46 and spliced pole 47, and depression bar 46's both ends are connected on bottom plate 45 through spliced pole 47 respectively, are provided with the clearance between depression bar 46 and the bottom plate 45, and the pole piece area is worn to establish through the clearance between depression bar 46 and the bottom plate 45, and operating personnel can cut off the pole piece area on connecting the area platform. Preferably, the bottom plate 45 is provided with a cutting groove 48, the cutting groove 48 is arranged along the width direction of the pole piece tape, and an operator can cut the pole piece tape along the cutting groove 48 when cutting the pole piece tape by using a tool such as a blade, so that the pole piece tape is conveniently cut.

In this embodiment, the first winding shaft 51 and the second winding shaft 52 are disposed in parallel at intervals, and the first winding shaft 51 and the second winding shaft 52 are both rotatably connected to the machine body 1, the first winding shaft 51 is located at the downstream of the first guide roller 43, the second winding shaft 52 is located at the downstream of the second guide roller 44, the qualified pole piece tapes are connected and wound on the first winding shaft 51, and the unqualified pole piece tapes are connected and wound on the second winding shaft 52, so that the qualified pole piece tapes on the unwinding shaft 2 are wound on the first winding shaft 51, and the unqualified pole piece tapes on the unwinding shaft 2 are wound on the second winding shaft 52.

When the rewinding machine is started to rewind at first, the sorting device 3 identifies the pole piece belts, if the pole piece belts are qualified pole piece belts, the sorting device 3 does not give an alarm, an operator winds the pole piece belts on the first winding shaft 51 after passing through the first belt connecting platform 41, and if the pole piece belts are unqualified pole piece belts, the sorting device 3 gives an alarm, and the operator winds the pole piece belts on the second winding shaft 52 after passing through the second belt connecting platform 42.

In the process of rewinding the pole piece strips by the rewinding machine, if the sorting device 3 detects that the pole piece strips discharged from the unwinding shaft 2 are changed from qualified to unqualified, the sorting device 3 gives an alarm, the rewinding machine stops working, an operator cuts off the pole piece strips which originally pass through the first strip receiving platform 41, and then the pole piece strips pass through the second strip receiving platform 42 and are wound on the second winding shaft 52, so that the operator can rewind the unqualified pole piece strips without replacing the receiving roll; if sorting unit 3 detects that the pole piece area that emits on unreeling axle 2 becomes qualified by unqualified, then sorting unit 3 stops reporting to the police, this rewinding machine stop work, operating personnel will originally pass the pole piece area on the second tape splicing platform 42 and cut off, then pass first tape splicing platform 41 with the pole piece area and coil in first rolling axle 51 for operating personnel need not change and receive the rewinding that the material was rolled up and can realize qualified pole piece area, can avoid receiving the change that makes a round trip many times of material is rolled up, can improve the sorting efficiency of pole piece area, reduce the intensity of labour that the pole piece area was selected separately.

Preferably, the rewinding machine further comprises a first pressing roller 53 and a second pressing roller 54, the first pressing roller 53 and the second pressing roller 54 are arranged in parallel at intervals, the first pressing roller 53 presses the qualified pole piece strips on the first winding shaft 51, the qualified pole piece strips on the first winding shaft 51 are flattened, the wave edges of the qualified pole piece strips in the winding process can be prevented, and the improvement of the regularity of the qualified pole piece strips wound by the rewinding machine is facilitated. The second pressing roller 54 presses the unqualified pole piece belt on the second winding shaft 52 to smooth the unqualified pole piece belt on the second winding shaft 52, so that the unqualified pole piece belt can be prevented from being wavy in the winding process, and the uniformity of winding the unqualified pole pieces by the rewinding machine can be improved.

Specifically, the rewinding machine further comprises a first pressure lever 55 and a second pressure lever 56, the first pressure lever 55 and the second pressure lever 56 are arranged in parallel at intervals, one end of the first pressure lever 55 is rotatably connected to the machine body 1, the first pressure roller 53 is rotatably connected to the other end of the first pressure lever 55, and the first pressure roller 53 can press the qualified pole piece strips on the first winding shaft 51 under the action of the first pressure lever 55. One end of the second pressing rod 56 is rotatably connected to the machine body 1, the second pressing roller 54 is rotatably connected to the other end of the second pressing rod 56, and the second pressing roller 54 can press the unqualified pole piece strip on the second winding shaft 52 under the action of the second pressing rod 56. Preferably, the connecting positions of the first pressure lever 55 and the second pressure lever 56 with the machine body 1 are both provided with a torsion spring, one end of the torsion spring is connected to the machine body 1, the other end of the torsion spring is connected to the first pressure lever 55 or the second pressure lever 56, and the torsion spring can drive the first pressure lever 55 and the second pressure lever 56 to press the first pressure roller 53 and the second pressure roller 54 on the first winding shaft 51 and the second winding shaft 52 respectively.

In this embodiment, this rewinding machine still includes the mechanism 6 of rectifying, and the mechanism 6 of rectifying sets up between unreeling axle 2 and sorting unit 3, and the pole piece area is worn to establish through the mechanism 6 of rectifying, and the mechanism 6 of rectifying can be spacing to the pole piece area that passes through, prevents the off tracking of pole piece area. Specifically, the deviation rectifying mechanism 6 comprises a guide roller 61 and a limit plate 62, the guide roller 61 is rotatably connected to the machine body 1, and the pole piece belt is abutted against the guide roller 61; the two limiting plates 62 are arranged oppositely, the two limiting plates 62 are arranged oppositely and are respectively arranged at two ends of the guide roller 61 in a blocking mode, the pole piece belts can be limited on the guide roller 61 to be transported downstream, and deviation of the pole piece belts is prevented. Preferably, the deviation rectifying mechanism 6 further comprises a limiting roller 63, the limiting roller 63 is connected between the two limiting plates 62 and arranged in parallel with the guide roller 61 at intervals, so that the pole piece belt is arranged among the guide roller 61, the limiting plates 62 and the limiting roller 63 and conveyed downstream, the pole piece belt can be prevented from moving along the radial direction of the guide roller 61, and the deviation of the pole piece belt is further prevented.

Preferably, the rewinding machine further comprises a tensioning assembly 7, the tensioning assembly 7 is connected to the machine body 1, the tensioning assembly 7 is located between the deviation correcting mechanism 6 and the first tape splicing platform 41, the tensioning assembly 7 comprises a first tensioning mechanism 71 and a second tensioning mechanism 72, the first tensioning mechanism 71 and the second tensioning mechanism 72 are oppositely arranged, the first tensioning mechanism 71 and the second tensioning mechanism 72 are respectively located on two sides of the pole piece belt, and the pole piece belt is clamped between the first tensioning mechanism 71 and the second tensioning mechanism 72 and tensioned by the first tensioning mechanism 71 and the second tensioning mechanism 72, so that the pole piece belt is prevented from slipping in the conveying process. Specifically, the first tensioning mechanism 71 includes a first tensioning roller 712 and a tensioning pressure lever 711, the first tensioning roller 712 is rotatably connected to one end of the tensioning pressure lever 711, and the other end of the tensioning pressure lever 711 is rotatably connected to the machine body 1. Preferably, a torsion spring is arranged at the connection position of the tensioning compression bar 711 and the machine body 1, one end of the torsion spring is connected to the machine body 1, the other end of the torsion spring is connected to the tensioning compression bar 711, and the torsion spring can drive the tensioning compression bar 711 to press and abut the first tensioning roller 712 on the pole piece belt.

In this embodiment, the second tensioning mechanism 72 includes a second tensioning roller 721, a third pressing rod 722 and a fourth pressing rod 723, the pole piece belt is sandwiched between the first tensioning roller 712 and the second tensioning roller 721, the second tensioning roller 721 is rotatably connected to one end of the third pressing rod 722 and one end of the fourth pressing rod 723, the other end of the third pressing rod 722 is rotatably connected to the machine body 1, the other end of the fourth pressing rod 723 is adjustably connected to the machine body 1, the position of the second tensioning roller 721 can be changed by adjusting the connecting position of the fourth pressing rod 723 and the machine body 1, and the tensioning degree of the pole piece belt by the second tensioning roller 721 can be adjusted. Specifically, a waist-shaped groove is formed in the machine body 1, the fourth pressing rod 723 is connected to the waist-shaped groove through a bolt assembly, and the fourth pressing rod 723 can be adjusted in position in the waist-shaped groove under the action of the bolt assembly.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.