Unwinding mechanism and battery cell cutting and stacking all-in-one machine

Abstract

The utility model discloses an unwinding mechanism, which comprises a traction assembly, a winding assembly and a winding assembly, the traction assembly comprises a first pole piece traction device and a second pole piece traction device which are arranged at an interval along the pole piece conveying direction, and the second pole piece traction device is positioned at the downstream of the first pole piece traction device; the tension adjusting assembly comprises a tension adjusting device and a tension detecting device, the tension adjusting device is used for adjusting the tension of the pole piece, and the tension detecting device is used for detecting the tension of the pole piece. According to the unwinding mechanism provided by the utility model, the two traction devices which are distributed at an interval can effectively prevent the pole piece from generating stronger tension in the conveying process, the tension is detected by the tension detection device, and the conveying tension of the pole piece is adjusted by the tension adjusting device; operation cooperation of the first pole piece traction device and the second pole piece traction device can be adjusted through feedback information, it is guaranteed that unwinding of the pole rolls on the unwinding mechanism and conveying of the pole pieces have good uniformity, and the consistency of the pole pieces in the conveying process is remarkably improved. The utility model further discloses a battery cell cutting and stacking all-in-one machine.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing equipment, in particular to an unwinding mechanism and a battery core cutting and stacking integrated machine. Background Art

[0002] The battery cell cutting and stacking machine includes a pole piece unwinding mechanism, a cutting mechanism and a stacking mechanism, wherein the unwinding mechanism is used to unwind the rolled pole piece at a specified speed and transfer it to the cutting mechanism for cutting. During the unwinding and transferring process of the pole piece, the pole piece traction device in the pole piece unwinding mechanism is the power source for the pole piece movement.

[0003] When the electrode is transferred from the electrode unwinding mechanism to the cutting mechanism for cutting, it is necessary to stop the movement in time to ensure that the cutting mechanism completes the electrode cutting operation smoothly. Therefore, during the entire unwinding and conveying process, the electrode presents intermittent movement, and the acceleration of the entire electrode movement is relatively large, so the electrode is subjected to large forces and the variation range is high. This uneven force will cause the electrode to deform, increasing the risk of battery explosion.

[0004] Therefore, during the unwinding and conveying process of the electrode, how to improve the force uniformity of the electrode to ensure the overall consistency of the electrode is a technical problem that technical personnel in this field currently need to solve. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a reeling mechanism to improve the force uniformity of the pole piece, thereby ensuring the overall consistency of the pole piece;

[0006] Another object of the present invention is to provide a battery core cutting and stacking machine having the above unwinding mechanism.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A reeling mechanism, comprising:

[0009] A traction assembly, comprising a first pole piece traction device and a second pole piece traction device, wherein the first pole piece traction device and the second pole piece traction device are arranged at intervals along a conveying direction of the pole piece, and the second pole piece traction device is located downstream of the first pole piece traction device;

[0010] The tension adjustment assembly includes a tension adjustment device and a tension detection device. During the pole piece conveying process, the tension adjustment device is used to adjust the tension of the pole piece, and the tension detection device is used to detect the tension of the pole piece.

[0011] Optionally, in the above-mentioned unwinding mechanism, the first pole piece traction device includes a traction roller, a pressure roller and a drive motor, and a conveying gap for conveying the pole piece is provided between the traction roller and the pressure roller, and the traction roller is connected to the drive motor.

[0012] Optionally, in the above-mentioned unwinding mechanism, the first pole piece traction device is further provided with a downward pressure cylinder and a brush for cleaning dust, and the downward pressure cylinder is connected to the pressure roller to adjust the conveying gap by driving the pressure roller to move.

[0013] Optionally, in the above-mentioned unwinding mechanism, the tension adjustment device includes a driving cylinder, a rotating shaft, a rocker arm and a swing roller, the swing roller is connected to the rotating shaft through the rocker arm, and the driving cylinder can drive the rotating shaft to rotate around its own axis.

[0014] Optionally, the unwinding mechanism further comprises a base, a frame, a deviation correction assembly and a material feeding roller assembly, wherein the frame is movably connected to the base;

[0015] The deflection correction component is provided with a deflection correction sensor. When the deflection correction sensor detects that the pole piece being conveyed is offset in position, the deflection correction component corrects the position of the pole piece by controlling the movement of the frame;

[0016] The feed roller assembly is used to control the movement direction of the pole piece.

[0017] Optionally, the above-mentioned unwinding mechanism includes a main unwinding assembly and a spare unwinding assembly, both of which are used to unwind the pole roll, and the main unwinding assembly and the spare unwinding assembly are both rotatably connected to the frame.

[0018] Optionally, the above-mentioned unwinding mechanism also includes a tape splicing platform and a roll diameter measuring component. When replacing materials, the tape splicing platform is used for splicing between two groups of pole pieces. When the upper pole roll of the main unwinding component or the spare unwinding component is unwound, an alarm is issued through the roll diameter measuring component.

[0019] Optionally, the above-mentioned unwinding mechanism also includes a cache assembly, which is provided with a cache roller. The cache roller can be slidably connected to the frame to adjust the length of the pole piece on the cache assembly, and the cache assembly is arranged between the first pole piece traction device and the second pole piece traction device, and is close to the second pole piece traction device relative to the first pole piece traction device.

[0020] Optionally, the above-mentioned unwinding mechanism also includes a wind knife dust removal assembly and an iron removal assembly, wherein the wind knife dust removal assembly removes dust on the pole piece through airflow, and the iron removal assembly is used to absorb iron filings on the pole piece, and the wind knife dust removal assembly and the iron removal assembly are each provided with two groups, and are respectively arranged on the two sides of the pole piece.

[0021] When the unwinding mechanism provided by the utility model is used, the first pole piece traction device and the second pole piece traction device of the traction assembly provide power for the transportation of the pole piece. The two traction devices distributed at intervals can effectively isolate the strong tension generated in the pole piece transportation process, improve the uniformity of the pole piece transportation upstream and downstream of the traction device, and the tension detection device detects the tension of the pole piece in real time during the entire transportation process of the pole piece, and feeds back the detected information to the tension adjustment device in time. The transportation tension of the pole piece is adjusted by the tension adjustment device, and the information can also be fed back to the traction assembly to adjust the operation of the first pole piece traction device and the second pole piece traction device for efficient coordination, thereby enhancing the uniformity of the pole piece unwinding and transportation. Therefore, through the first pole piece traction device and the second pole piece traction device in the traction assembly, as well as the tension adjustment device and the tension detection device in the tension adjustment assembly, it is ensured that the pole roll in the unwinding mechanism has good uniformity in the unwinding and pole piece transportation, significantly improves the consistency of the pole piece during the transportation process, and greatly reduces the risk of battery explosion.

[0022] A battery cell cutting and stacking machine comprises an unwinding mechanism, wherein the unwinding mechanism is the unwinding mechanism as described in any one of the above items.

[0023] The battery cell cutting and stacking machine provided by the present invention has all the technical effects of the unwinding mechanism mentioned above, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of the unwinding mechanism disclosed in the embodiment of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the first pole piece traction device disclosed in an embodiment of the utility model;

[0027] Figure 3 It is a schematic structural diagram of the tension adjustment device disclosed in the embodiment of the utility model.

[0028] Among them, 10 is a base; 20 is a frame; 30 is a main unwinding assembly, 31 is a standby unwinding assembly; 40 is a deviation correction assembly; 50 is a feed roller assembly; 60 is a belt splicing platform; 70 is a roll diameter measurement assembly; 80 is an air knife dust removal assembly; 90 is an iron removal assembly;

[0029] 100 is a first pole piece traction device, 110 is a traction roller, 120 is a pressure roller, 130 is a driving motor, 140 is a downward pressure cylinder, and 150 is a brush;

[0030] 200 is a second pole piece traction device;

[0031] 300 is a tension adjustment device, 310 is a driving cylinder, 320 is a rotating shaft, 330 is a swing rod, 340 is a swing roller, and 350 is a welding frame;

[0032] 400 is a tension detection device;

[0033] 500 is a cache component, and 510 is a cache roller. DETAILED DESCRIPTION

[0034] The core of the utility model is to provide an unwinding mechanism to improve the force uniformity of the pole piece, thereby ensuring the overall consistency of the pole piece;

[0035] Another core of the utility model is to provide a battery cell cutting and stacking machine with the above unwinding mechanism.

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] like Figure 1As shown, the embodiment of the utility model discloses an unwinding mechanism, including a traction assembly and a tension adjustment assembly. The traction assembly is provided with a first pole piece traction device 100 and a second pole piece traction device 200, the first pole piece traction device 100 and the second pole piece traction device 200 are arranged at intervals along the conveying direction of the pole piece, and the second pole piece traction device 200 is located downstream of the first pole piece traction device 100 and close to the cutting mechanism relative to the first pole piece traction device 100. By arranging the first pole piece traction device 100 and the second pole piece traction device 200, not only a better power is provided for the unwinding and conveying of the pole piece, but also the traction devices arranged at intervals can effectively isolate the tension of the pole piece, effectively reducing the strong tension generated by the pole piece during the conveying process. At the same time, in order to further control and adjust the tension of the pole piece, the unwinding mechanism provided in this embodiment is also provided with a tension adjustment assembly having a tension adjustment device 300 and a tension detection device 400. During the conveying process of the pole piece, the tension detection device 400 monitors the tension of the pole piece in real time, and feeds back the information to the system to adjust the tension of the pole piece through the tension adjustment device 300 accordingly, so as to ensure that the tension of the pole piece is kept within a preset range during the entire conveying process. In addition, the system can also adjust the operation of the first pole piece traction device 100 and the second pole piece traction device 200 in the traction assembly according to the feedback of the tension detection device 400, so that the first pole piece traction device 100 and the second pole piece traction device 200 have good coordination to provide appropriate power for the unwinding and conveying of the pole piece, and then ensure the uniformity of the unwinding and conveying of the pole piece, and the overall consistency of the pole piece while meeting the cutting mechanism's demand for the pole piece cutting, and significantly reduce the risk of battery explosion.

[0038] like Figure 2 As shown, the first pole piece traction device 100 includes a traction roller 110, a pressure roller 120 and a drive motor 130. A conveying gap is set between the traction roller 110 and the pressure roller 120. The pole piece passes through the conveying gap during transportation, so that the traction roller 110 and the pressure roller 120 abut against the pole piece, and the traction roller 110 is driven to rotate by the drive motor 130. At this time, the friction between the traction roller 110, the pole piece and the pressure roller 120 pushes the pole piece to move along the conveying direction, providing power for the movement of the pole piece.

[0039] At the same time, in order to ensure that the first pole piece traction device 100 drives the pole piece stably, the first pole piece traction device 100 is provided with a downward pressure cylinder 140, and the downward pressure cylinder 140 is connected to the pressure roller 120. The downward pressure cylinder 140 can drive the pressure roller 120 to move toward the traction roller 110 to adjust the distance of the transmission gap, so as to adjust the friction between the traction roller 110, the pressure roller 120 and the pole piece, and then ensure the smoothness of the transportation in the whole production process. In addition, a brush 150 is provided to clean the dust on the traction roller 110 in time to reduce the impact on the pole piece transportation. Of course, it can be understood that the second pole piece traction device 200 provided in this embodiment can also be provided with the above-mentioned structure of the first pole piece traction device 100, and those skilled in the art can design it according to actual needs.

[0040] like Figure 3 As shown, the driving cylinder 310, the rotating shaft 320, the swing rod 330 and the swing roller 340 of the tension adjustment device 300 are installed on the frame 20 through the welding frame 350, wherein the swing roller 340 is connected to the rotating shaft 320 through the swing rod 330, and the rotating shaft 320 can rotate around its own axis. Therefore, when the tension of the pole piece needs to be adjusted, the driving cylinder 310 drives the rotating shaft 320 to rotate so that the swing roller 340 swings around the axis of the rotating shaft 320, thereby pressing or relaxing the pole piece in contact with the swing roller 340, and adjusting the tension of the pole piece. The tension adjustment device 300 provided in this embodiment is provided with two, and the two tension adjustment devices 300 are respectively arranged upstream of the first pole piece traction device 100 and upstream of the second pole piece traction device 200, corresponding to the first pole piece traction device 100 and the second pole piece traction device 200.

[0041] like Figure 1 As shown, the frame 20 for mounting components is movably mounted on the base 10 through a guide rail, and the pole piece is installed through the coil feed position of the frame 20, and the pole piece is transported out of the unwinding mechanism provided in this embodiment through the pole piece outlet. The conveying direction of the pole piece is controlled by the material roller assembly 50, and the position of the pole piece in conveyance is detected in real time by the deviation correction sensor. If the deviation of the pole piece exceeds the preset range, the deviation correction sensor feeds back the information to the deviation correction assembly 40, and the deviation correction assembly 40 adjusts by controlling the movement of the frame 20 on the base to ensure that the position of the pole piece output from the outlet remains within the preset range, providing a good cutting preparation for the cutting mechanism of the next process, and improving the qualified rate and quality of the pole piece cutting.

[0042] In addition, the unwinding mechanism provided in this embodiment can be equipped with two groups of components for unwinding the pole roll, including a main unwinding component 30 and a spare unwinding component 31. Both the main unwinding component 30 and the spare unwinding component 31 can be rotatably installed on the frame 20. When working, the pole roll can be installed on the main unwinding component 30, and the spare unwinding component 31 is used as a spare. When needed, it can be replaced in time to reduce downtime, ensure the efficient operation of the unwinding mechanism, and meet the needs of fast production rhythm.

[0043] like Figure 1 As shown, the frame 20 is also equipped with a tape splicing platform 60 and a coil diameter measuring component 70. When replacing materials, the tape splicing platform 60 is used to achieve rapid splicing between the replaced materials, further ensuring the transmission efficiency of the pole piece. The main unwinding component 30 performs real-time detection on the upper pole roll of the main unwinding component 30 or the spare unwinding component 31. After the pole roll is unwound, the coil diameter measuring component 70 will sound an alarm to prompt the staff to replace it in time.

[0044] In a specific embodiment, a buffer assembly 500 is further provided between the first pole piece traction device 100 and the second pole piece traction device 200, and the buffer assembly 500 is closer to the second pole piece traction device 200 relative to the first pole piece traction device 100. The buffer assembly 500 is provided with a plurality of buffer rollers 510, and the pole pieces pass through the buffer rollers 510 in sequence during the conveying process, and the buffer rollers 510 can slide on the frame 20.

[0045] Therefore, when the first pole piece device 100 is unwinding the pole piece conveyance and the cutting mechanism is performing gap cutting of the pole piece, when the second pole piece traction device 200 stops conveying the pole piece, the cache roller 510 is moved to increase the length of the pole piece around the cache component 500, thereby temporarily storing the pole piece conveyed from the upstream. When it is necessary to continue conveying, the cache roller 510 can be adjusted again to shorten the length of the pole piece around the cache component 500. Thereby, through the cache component 500, the operation of the unwinding mechanism and the cutting mechanism provided in this embodiment are more matched, thereby further improving the uniformity of unwinding and conveying, and improving the consistency of the pole piece during the unwinding and conveying process.

[0046] like Figure 1 As shown, downstream of the belt connection platform 60, there are air knife dust removal components (80) and iron removal components 90 arranged in sequence at intervals. The air knife dust removal components 80 remove dust on the pole piece through airflow, and the iron removal components 90 adsorb and clean iron filings attached to the pole piece. In addition, the air knife dust removal components 80 and the iron removal components 90 are each provided with two groups arranged on the two sides of the pole piece, respectively, to ensure that both sides of the pole piece can be well cleaned.

[0047] The embodiment of the utility model further discloses a battery cell cutting and stacking machine, including a reeling mechanism. Since the battery cell cutting and stacking machine has the reeling mechanism, it has all the technical effects of the reeling mechanism, which will not be described in detail herein.

[0048] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0049] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0050] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0051] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0052] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A reeling mechanism, characterized in that: include: A traction assembly, comprising a first pole piece traction device (100) and a second pole piece traction device (200), wherein the first pole piece traction device (100) and the second pole piece traction device (200) are arranged at intervals along a conveying direction of the pole piece, and the second pole piece traction device (200) is located downstream of the first pole piece traction device (100); The tension adjustment assembly comprises a tension adjustment device (300) and a tension detection device (400). During the pole piece conveying process, the tension adjustment device (300) is used to adjust the tension of the pole piece, and the tension detection device (400) is used to detect the tension of the pole piece.

2. The unwinding mechanism according to claim 1, characterized in that: The first pole piece traction device (100) comprises a traction roller (110), a pressure roller (120) and a drive motor (130), and a transmission gap for transmitting the pole piece is provided between the traction roller (110) and the pressure roller (120), and the traction roller (110) is connected to the drive motor (130).

3. The unwinding mechanism according to claim 2, characterized in that: The first pole piece pulling device (100) is further provided with a downward pressing cylinder (140) and a brush (150) for cleaning dust, and the downward pressing cylinder (140) is connected to the pressing roller (120) so as to adjust the conveying gap by driving the pressing roller (120) to move.

4. The unwinding mechanism according to claim 1, characterized in that: The tension adjustment device (300) comprises a driving cylinder (310), a rotating shaft (320), a swing rod (330) and a swing roller (340); the swing roller (340) is connected to the rotating shaft (320) via the swing rod (330), and the driving cylinder (310) can drive the rotating shaft (320) to rotate around its own axis.

5. The unwinding mechanism according to claim 1, characterized in that: It also comprises a base (10), a frame (20), a deviation correction assembly (40) and a material transfer roller assembly (50), wherein the frame (20) is movably connected to the base (10); The deflection correction component (40) is provided with a deflection correction sensor, and when the deflection correction sensor detects that the transferred pole piece is deflected, the deflection correction component (40) corrects the position of the pole piece by controlling the movement of the frame (20); The material transfer roller assembly (50) is used to control the movement direction of the pole piece.

6. The unwinding mechanism according to claim 5, characterized in that: It comprises a main unwinding assembly (30) and a standby unwinding assembly (31) both used for unwinding the pole coil, and both the main unwinding assembly (30) and the standby unwinding assembly (31) are rotatably connected to the frame (20).

7. The unwinding mechanism according to claim 6, characterized in that: It also comprises a tape splicing platform (60) and a coil diameter measuring assembly (70). When replacing materials, the tape splicing platform (60) is used for splicing two groups of pole pieces. When the upper pole roll of the main unwinding assembly (30) or the standby unwinding assembly (31) is unwound, an alarm is issued through the coil diameter measuring assembly (70).

8. The unwinding mechanism according to claim 5, characterized in that: The invention also comprises a cache assembly (500), wherein the cache assembly (500) is provided with a cache roller (510), wherein the cache roller (510) is slidably connected to the frame (20) to adjust the length of the pole piece on the cache assembly (500), and the cache assembly (500) is arranged between the first pole piece traction device (100) and the second pole piece traction device (200), and is close to the second pole piece traction device (200) relative to the first pole piece traction device (100).

9. The unwinding mechanism according to claim 1, characterized in that: It also includes an air knife dust removal component (80) and an iron removal component (90), wherein the air knife dust removal component (80) removes dust on the pole piece through airflow, and the iron removal component (90) is used to absorb iron filings on the pole piece, and the air knife dust removal component (80) and the iron removal component (90) are each provided with two groups, and are respectively arranged on two sides of the pole piece.

10. A battery cell cutting and stacking machine, characterized in that: It comprises an unwinding mechanism, and the unwinding mechanism is an unwinding mechanism as described in any one of claims 1-9.

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