Fixed-length cutting system of winding machine
By introducing a length measuring wheel and controller into the winding machine, combined with an encoder and a cutting mechanism, fixed-length cutting is achieved, solving the problem that the winding machine equipment cannot be compatible with different electrode processes, and improving the applicability and flexibility of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2026-04-14
AI Technical Summary
Existing winding machines are incompatible with different process types when cutting electrode sheets, leading to sensor failure and narrowing the scope of application of winding machines.
By adding a length-counting wheel and a controller, combined with an encoder and a cutting mechanism, a length-counting wheel metering and cutting method is adopted. The controller controls the cutting action according to the metering signal to achieve fixed-length cutting, which is compatible with different types of electrode sheets.
The applicable range of the winding machine has been expanded, making it compatible with various electrode types. Furthermore, an induction cutting method has been added without changing the original equipment structure, thus improving the flexibility of the equipment.
Smart Images
Figure CN224118427U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of lithium battery cell processing, specifically relating to a winding machine fixed-length cutting system. Background Technology
[0002] Currently, the common bare cell forming processes for power batteries in the lithium battery industry are roughly divided into two types: winding and stacking. For the winding process, the winding machine cuts the positive and negative electrode sheets after the cell is wound to facilitate subsequent finishing work. The electrode sheet cutting method usually involves a sensor detecting the specific cutting position and triggering a signal to the subsequent cutting mechanism to cut the electrode sheet. With this inductive cutting method, if the sensor fails to function when encountering electrode sheets of different process types, the subsequent cutting mechanism will be unable to cut. This makes the winding machine incompatible with some electrode sheets of specific processes, greatly narrowing the scope of application of the winding machine. Utility Model Content
[0003] To address the shortcomings described in the prior art, this utility model provides a winding machine fixed-length cutting system that is as compatible as possible with the original induction cutting method. By adding a length counting wheel, the cutting mechanism is controlled by a controller to perform cutting, thereby improving the applicability of the winding machine to different types of electrode sheets.
[0004] The technical solution adopted in this utility model is as follows:
[0005] A winding machine fixed-length cutting system includes a positive electrode length measuring wheel, a positive electrode cutting mechanism, a negative electrode length measuring wheel, a negative electrode cutting mechanism, a diaphragm cutting mechanism, a winding mechanism, and a controller. The cutting power component of the diaphragm cutting mechanism is electrically connected to the controller, and the winding power component of the winding mechanism is electrically connected to the controller. The encoders of the positive electrode length measuring wheel and the negative electrode length measuring wheel are respectively electrically connected to the controller, and the cutting power components of the positive electrode cutting mechanism and the negative electrode cutting mechanism are respectively electrically connected to the controller. The diaphragm cutting mechanism uses a cutting cylinder as its cutting power component. When the cutting cylinder is started or energized, it sends a trigger signal to the controller. The controller then controls the winding motor of the winding mechanism to perform winding. The controller begins receiving encoder output signals from the positive and negative electrode length measuring wheels. Based on the measurement signals from the two length measuring wheel encoders, the controller controls the corresponding positive and negative electrode cutting mechanisms to cut the electrodes. Using length measuring wheels as the measurement method for cutting length is applicable to different types of electrodes, thus improving the applicability of the winding machine. The controller described is a PLC controller.
[0006] In a preferred embodiment of this invention, a positive electrode sensor, a negative electrode sensor, and a switching switch are also included, all of which are electrically connected to the controller. The controller can select between a length-measuring cutting method and an inductive cutting method based on the signal from the switching switch.
[0007] This invention adds a length-measuring wheel to the positive and negative electrode sheet conveying stage of the original battery cell winding equipment. The length-measuring wheel measures the length of the electrode sheet conveying. The controller controls the positive and negative electrode sheet cutting mechanism to cut the positive and negative electrode sheets according to the measurement of the length-measuring wheel. The controller uses the action signal of the heat insulation cutting mechanism as the signal to start the length-measuring wheel measurement. The length-measuring wheel measurement and cutting method is not limited by the type of electrode sheet, which expands the applicability of the winding machine. It can also be equipped with an inductive cutting method. When changing the cutting method, a switch can be used to change it. The modification to the original winding equipment is minimal. Attached Figure Description
[0008] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0009] Figure 1 This is a diagram showing the positional distribution of the electrode plates in each mechanism of this utility model during the tape travel.
[0010] Figure 2 This is a schematic diagram of the control principle of this utility model. Detailed Implementation
[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0012] Example:
[0013] A winding machine fixed-length cutting system, such as Figure 1 and 2As shown, the system includes a positive electrode length measuring roller 1, a positive electrode cutting mechanism 2, a negative electrode length measuring roller 3, a negative electrode cutting mechanism 4, a diaphragm cutting mechanism 5, a winding mechanism 9, and a controller. The equipment used for both the positive and negative electrode conveyors is the same, including an unwinding mechanism and a conveying mechanism. At the winding mechanism 9, the positive and negative electrodes and the diaphragm are wound together. The diaphragm cutting mechanism 5 is located at the winding mechanism 9 to cut the diaphragm, thus separating different cores. The positive electrode cutting machine... The positive electrode cutting mechanism 2 and the negative electrode cutting mechanism 4 are symmetrically arranged near the winding mechanism 9. The positive electrode length measuring wheel 1 is located upstream of the positive electrode cutting mechanism 2, and the negative electrode length measuring wheel 3 is located upstream of the negative electrode cutting mechanism 4. The positive and negative electrodes on the conveyor belt pass through their respective length measuring wheels and cutting mechanisms, and are then combined with the diaphragm and wound at the winding mechanism. The winding mechanism 9 serves as the main power source for winding the positive and negative electrodes and the diaphragm. When the cutting cylinder of the diaphragm cutting mechanism 5 is energized and started, the controller receives a signal. The signal triggers the controller to begin receiving output data from the positive electrode length measuring wheel 1 encoder and the negative electrode length measuring wheel 3 encoder. Both encoders are connected to the controller's IO output port via communication lines, and all three, along with the controller, are powered by 24V. The positive and negative electrode length measuring wheels 1 and 3 can be purchased directly; an Omron E6B2-CWZ6C can be used. The controller is a PLC controller, such as a Yaskawa MP3200, which can be used from the original core winding machine. The controller only needs to perform simple addition and subtraction operations. Once the preset conditions are met, it sends signals to the cutting cylinders of the positive electrode cutting mechanism 2 and the negative electrode cutting mechanism 4, controlling the timing of electrode cutting. Using length measuring wheels as the cutting length measurement method is applicable to different types of electrodes, thus improving the applicability of the winding machine.
[0014] To minimize changes to the existing battery cell winding production line, the positive electrode sensor 6 and the negative electrode sensor 7 are retained. The positive electrode sensor 6 is located between the positive electrode length measuring wheel 1 and the positive electrode cutting mechanism 2, and the negative electrode sensor 7 is located between the negative electrode length measuring wheel 3 and the negative electrode cutting mechanism 4. A switching switch 8 is added to switch the cutting mode by triggering the switching switch, so that the winding production line can have two cutting modes at the same time.
[0015] Of course, you can also use the length-measuring cutting method, directly removing the original sensor or not removing it but not using it.
[0016] Using a length-measuring cutting method can address situations where the winding machine's sensor fails due to the unique design of the electrode itself, thereby expanding the applicability of the winding machine.
[0017] In this specification, the terms "an embodiment," "example," "specific example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0018] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A fixed-length cutting system for a winding machine, characterized in that: It includes a positive electrode length measuring wheel (1), a positive electrode cutting mechanism (2), a negative electrode length measuring wheel (3), a negative electrode cutting mechanism (4), a diaphragm cutting mechanism (5), a winding mechanism (9), and a controller. The cutting power component of the diaphragm cutting mechanism (5) is electrically connected to the controller, and the winding power component of the winding mechanism is electrically connected to the controller. The encoders of the positive electrode length measuring wheel (1) and the negative electrode length measuring wheel (3) are electrically connected to the controller, and the cutting power components of the positive electrode cutting mechanism (2) and the negative electrode cutting mechanism (4) are electrically connected to the controller.
2. The winding machine fixed-length cutting system according to claim 1, characterized in that: It also includes a positive electrode sensor (6), a negative electrode sensor (7) and a switching switch (8), which are electrically connected to the controller.