Battery pole piece winding device and coating equipment

Abstract

The utility model belongs to the technical field of battery pole piece production, and particularly relates to a battery pole piece winding device, which comprises a membrane unwinding mechanism, a winding mechanism, a winding mechanism and a winding mechanism, the winding mechanism is used for winding the battery pole piece and the supporting film; the traction mechanism is arranged between the winding mechanism and the film unwinding mechanism and is used for dragging and supporting the film walking belt to enter the winding mechanism; the cutting-off mechanism is arranged between the traction mechanism and the film releasing mechanism and used for cutting off the supporting film; the control mechanism is connected with the cut-off mechanism and used for periodically controlling the cut-off mechanism to work; the utility model has the beneficial effects that the film unwinding mechanism unwinds the supporting film, the supporting film and the battery pole piece are dragged by the traction mechanism to be wound together by the winding device, and after the winding device winds the supporting film with a certain length, the control mechanism controls the cutting mechanism to work to cut off the supporting film. And the supporting film can play a certain role in supporting the pole piece in the rolled pole roll, so that abnormal deformation such as bumps on the film surface of the pole piece is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery pole piece production, and in particular relates to a battery pole piece winding device and coating equipment. Background Art

[0002] Battery electrodes are key components in batteries that store charge and conduct current. While their structure and function may vary depending on the battery type, their primary function is to provide a carrier for electrochemical reactions and enable current to flow within the battery.

[0003] Pole sheet coating is a critical step in the battery electrode production process. After coating and drying, the battery electrode sheets are typically wound into coils using a winding device. During this process, it is common for the electrode sheets to have acceptable thickness, but bulges may appear after the winding is stacked. This bulging phenomenon can cause deformation of the electrode sheets within the coil, thus impacting subsequent battery production. Utility Model Content

[0004] The purpose of the present invention is to solve the above-mentioned technical problems and provide a battery pole piece winding device and coating equipment to solve the bulging phenomenon that occurs after the pole pieces are wound and stacked.

[0005] In view of this, the present invention provides a battery electrode winding device, comprising:

[0006] A film unwinding mechanism, comprising a supporting film, and configured to unwind the supporting film;

[0007] The winding mechanism is used to wind up the battery pole piece and the support film;

[0008] The traction mechanism is arranged between the winding mechanism and the film unwinding mechanism, and is used to pull the supporting film belt into the winding mechanism;

[0009] The cutting mechanism is arranged between the traction mechanism and the film placing mechanism and is used to cut the supporting film;

[0010] The control mechanism is connected to the cutting mechanism and is used for periodically controlling the operation of the cutting mechanism.

[0011] Furthermore, the traction mechanism includes:

[0012] Traction roller, which is used to pull the support film to move along the belt;

[0013] The first driving member is used to control the rotation of the traction clamping roller.

[0014] Furthermore, the cutting mechanism includes:

[0015] The fixed clamping roller is arranged between the film placing mechanism and the traction clamping roller and is used to clamp and fix the supporting film;

[0016] a second driving member, the second driving member is used to control the fixed clamping roller to clamp or release the supporting film;

[0017] Wherein, a plurality of tearing zones are provided on the supporting film, and the distance between two adjacent tearing zones is greater than the distance between the fixed clamping roller and the traction clamping roller.

[0018] Furthermore, the support membrane further comprises:

[0019] A raised portion, the raised portion being arranged on a side edge of the supporting film;

[0020] The control mechanism includes a sensor;

[0021] When the protrusion passes through the sensor, the control mechanism controls the cutting mechanism to operate.

[0022] Furthermore, the control mechanism includes a timer, and the timer periodically starts the control mechanism to control the operation of the cutting mechanism.

[0023] Furthermore, the winding device further comprises:

[0024] The grounding mechanism is connected to the film-releasing mechanism and is used to release static electricity generated during the operation of the film-releasing mechanism.

[0025] Furthermore, the support film is a PP film.

[0026] A coating device, comprising any of the above-mentioned battery pole sheet winding devices, further comprising:

[0027] Unwinding device, the unwinding device is used to unwind the battery electrode.

[0028] Furthermore, it also includes:

[0029] The oven is arranged between the battery pole piece winding device and the unwinding device and is used to dry the battery pole pieces.

[0030] The beneficial effects of the utility model are:

[0031] The film unwinding mechanism unwinds the support film, which is then pulled by the traction mechanism to be rewound together with the battery electrode by the rewinding device. After the rewinding mechanism has rewound a certain length of the support film, the control mechanism controls the cutting mechanism to cut the support film, thus completing a cycle of electrode rewinding operation. The support film inside the electrode roll after rewinding can provide certain support for the electrode, preventing abnormal deformation such as bulging on the electrode film surface, thereby effectively avoiding the impact on subsequent battery production. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1It is a structural diagram of the utility model;

[0033] Figure 2 This is a schematic diagram of the support membrane structure of the utility model;

[0034] The marks in the figure are:

[0035] 1. Film unwinding mechanism; 2. Support film; 21. Tearing area; 22. Raised portion; 3. Traction roller; 4. Fixed roller; 5. Grounding mechanism; 6. Unwinding device; 7. Rewinding mechanism; 8. Oven. DETAILED DESCRIPTION

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

[0037] In the description of this application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0038] Example 1:

[0039] This embodiment provides a battery electrode winding device, comprising:

[0040] The film unwinding mechanism 1 includes a support film 2 and is used to unwind the support film 2;

[0041] The winding mechanism 7 is used to wind up the battery electrode and the support film 2;

[0042] The traction mechanism is arranged between the winding mechanism 7 and the film unwinding mechanism 1, and is used to pull the support film 2 into the winding mechanism 7;

[0043] The cutting mechanism is arranged between the traction mechanism and the film placing mechanism 1 and is used to cut the supporting film 2;

[0044] The control mechanism is connected to the cutting mechanism and is used for periodically controlling the operation of the cutting mechanism.

[0045] In this technical solution, when the battery electrode after the coating operation is wound up by the winding mechanism 7, the film unwinding mechanism unwinds the support film 2 at the same time. The support film 2 can be a PP film. The support film 2 is pulled by the traction mechanism and wound up together with the battery electrode by the winding mechanism 7. After the winding mechanism 7 winds up a certain length of the support film 2, the film unwinding mechanism 1 and the traction mechanism stop working, and the control mechanism controls the cutting mechanism to work, cut off the support film 2, and complete a pole piece winding operation of an anti-bulging cycle.

[0046] Since the support film is relatively hard, the support film 2 can provide a certain support to the electrode inside the rolled electrode roll, preventing abnormal deformation such as bulging on the electrode film surface, thereby effectively avoiding the impact on battery production and having high practicality.

[0047] Furthermore, the device also includes a grounding mechanism 5, which is connected to the film unwinding mechanism and is used to discharge static electricity generated during the operation of the film unwinding mechanism 1. This structural design prevents dust, fibers, or other tiny particles from adhering to the surface of the support film 2 due to static electricity, thereby preventing damage to the electrode film surface when the support film 2 and the electrode are reeled together. It also prevents static electricity from interfering with the equipment or posing a safety hazard to the operator, effectively improving user safety.

[0048] Example 2:

[0049] This embodiment provides a battery electrode winding device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0050] Furthermore, the traction mechanism includes:

[0051] The traction roller 3 is used to traction the support film 2 for belt conveying;

[0052] The first driving member is used to control the rotation of the traction roller 3.

[0053] In this technical solution, the traction clamping roller 3 can be composed of two rollers, and the first driving member can be two motors, which respectively control the rotation of the two rollers. The pressure between the two rollers is small, and the support film 2 can pass through between the two rollers. The motor drives the rollers to rotate to drive the support film 2 to move, thereby realizing the traction operation of the support film 2.

[0054] Example 3:

[0055] This embodiment provides a battery electrode winding device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0056] Furthermore, the cutting mechanism includes:

[0057] The fixed clamping roller 4 is provided between the film placing mechanism 1 and the traction clamping roller 3 and is used for clamping and fixing the supporting film 2;

[0058] A second driving member, the second driving member is used to control the fixed clamping roller 4 to clamp or release the supporting film 2;

[0059] The supporting film 2 is provided with a plurality of tearing zones 21 , and the distance between two adjacent tearing zones 21 is greater than the distance between the fixed nip roller 4 and the traction nip roller 3 .

[0060] In this technical solution, the fixed clamping roller 4 can be composed of two pressure rollers, and the second driving member can be two cylinders. After the winding mechanism 7 winds up a certain length of the support film 2, the cutting mechanism performs the cutting operation. At this time, the two adjacent tearing areas 21 on the support film 2 will be respectively located between the traction clamping roller 3 and the winding mechanism 7 and between the fixed clamping roller 4 and the film unwinding mechanism 1.

[0061] The two pressure rollers are controlled by a cylinder drive to move closer to each other, clamping and fixing the support film 2. At the same time, the winding mechanism 7 continues to wind and pull the support film 2, so that the support film 2 is broken in the tearing area 21 between the traction clamping roller 3 and the winding mechanism 7, thereby realizing the cutting operation of the support film 2, which is simple and convenient to operate.

[0062] Example 4:

[0063] This embodiment provides a battery electrode winding device, which, in addition to the technical solutions of the above-mentioned embodiments 1-3, also has the following technical features.

[0064] Furthermore, the support film 2 further comprises:

[0065] The raised portion 22 is provided on the side of the supporting film 2;

[0066] The control mechanism includes a sensor;

[0067] When the protrusion 22 passes through the sensor, the control mechanism controls the cutting mechanism to operate.

[0068] In this technical solution, the control mechanism includes an automatic control system and a sensor. The automatic control system can be a PLC control system, and the sensor can be a fiber optic sensor. The fiber optic sensor is electrically connected to the automatic control system. When the fiber optic sensor senses that the protrusion 22 on the support membrane 2 passes by, the fiber optic sensor transmits the sensing signal to the automatic control system, and then the automatic control system controls the cutting mechanism to cut off the support membrane 2.

[0069] Example 5:

[0070] This embodiment provides a battery electrode winding device, which, in addition to the technical solutions of the above-mentioned embodiments 1-3, also has the following technical features.

[0071] Furthermore, the control mechanism includes a timer, and the timer periodically starts the control mechanism to control the operation of the cutting mechanism.

[0072] In this technical solution, the control mechanism includes an automatic control system and a timer. The time taken for the support film 2 to be fed from the fixed clamping roller 4 to pass through the traction clamping roller 3 is calculated based on the winding speed of the winding mechanism 7 and the distance between two adjacent tearing areas 21 on the support film 2. Then, the control mechanism is started regularly by the timer to control the cutting mechanism to work, thereby realizing periodic cutting of the support film 2.

[0073] Example 6:

[0074] This embodiment provides a coating device, which, in addition to the battery electrode sheet winding device described in any one of the above embodiments 1 to 5, further includes:

[0075] Unwinding device 6, unwinding device 6 is used to unwind the battery electrode;

[0076] Furthermore, it also includes an oven 8, which is arranged between the battery electrode winding device and the unwinding device 6 and is used to dry the battery electrode.

[0077] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A battery pole piece winding device, characterized in that: include: A film unwinding mechanism (1), the film unwinding mechanism (1) comprising a support film (2), the film unwinding mechanism (1) being used to unwind the support film (2); A winding mechanism (7), the winding mechanism (7) being used to wind up the battery electrode sheet and the support film (2); A traction mechanism, the traction mechanism being arranged between the winding mechanism (7) and the film unwinding mechanism (1), and being used for pulling the supporting film (2) to run into the winding mechanism (7); A cutting mechanism, the cutting mechanism being arranged between the traction mechanism and the film placing mechanism (1) and being used for cutting the supporting film (2); The control mechanism is connected to the cutting mechanism and is used for periodically controlling the operation of the cutting mechanism.

2. The battery pole piece winding device according to claim 1, characterized in that: The traction mechanism comprises: A traction roller (3), wherein the traction roller (3) is used to traction the support film (2) to travel; A first driving member is used to control the rotation of the traction clamping roller (3).

3. The battery pole piece winding device according to claim 2, characterized in that: The cutting mechanism comprises: A fixed clamping roller (4), the fixed clamping roller (4) being arranged between the film placing mechanism (1) and the traction clamping roller (3) and being used for clamping and fixing the supporting film (2); A second driving member is used to control the fixed clamping roller (4) to clamp or release the supporting film (2).

4. The battery pole piece winding device according to claim 1, characterized in that: A plurality of tearing areas (21) are provided on the support film (2), and the distance between two adjacent tearing areas (21) is greater than the distance between the traction mechanism and the cutting mechanism.

5. The battery pole piece winding device according to claim 1, characterized in that: The support membrane (2) further comprises: A raised portion (22), the raised portion (22) being arranged on a side edge of the supporting film (2); The control mechanism includes a sensor; When the protrusion (22) passes through the sensor, the control mechanism controls the cutting mechanism to operate.

6. The battery pole piece winding device according to claim 1, characterized in that: The control mechanism includes a timer, and the timer periodically starts the control mechanism to control the operation of the cutting mechanism.

7. The battery pole piece winding device according to claim 1, characterized in that: Also includes: A grounding mechanism (5) is connected to the film-releasing mechanism and is used to release static electricity generated when the film-releasing mechanism (1) is in operation.

8. The battery pole piece winding device according to claim 1, characterized in that: The supporting film (2) is a PP film.

9. A coating device, characterized in that: The battery pole sheet winding device according to any one of claims 1 to 8 further comprises: An unwinding device (6) is used for unwinding a battery electrode.

10. The coating device according to claim 9, characterized in that Also includes: An oven (8) is provided between a battery pole piece winding device and an unwinding device (6) and is used for drying the battery pole pieces.

Images