An electrode piece cutting device and tab production equipment

Abstract

The application discloses a pole piece cutting device for cutting a continuous tab belt, comprising a cutting assembly, a conveying assembly arranged at one end of the cutting assembly, and a control assembly; the control assembly is electrically connected with the cutting assembly and the conveying assembly, and comprises a first detection component and a second detection component; when the first detection component detects that a tab is in place, the control assembly controls the conveying assembly to stop conveying and drives the cutting assembly to perform first cutting; the second detection component is used for an adjacent tab at the rear end of the tab detected by the first detection component, and determines the length of the tab in combination with the conveying assembly and the first detection component; then, after the first cutting, the control assembly controls the conveying assembly to continue conveying for the length of a tab, and drives the cutting assembly to perform second cutting. The application also discloses a tab cutting device comprising the pole piece cutting device.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery technology, and in particular to an electrode cutting device and electrode production equipment. Background Technology

[0002] With the rapid development of products such as power batteries and energy storage batteries, the automated production of electrode sheets has become a crucial link in improving capacity and consistency. Currently, the automatic winding machines commonly used in the market have extremely high requirements for the coating and sheet preparation precision of the electrode sheets during the winding processes of electrode sheet rewinding and center tab emergence.

[0003] However, due to certain deviations in the actual precision of the coating and sheet-making processes, the instability of the electrode cutting position increases significantly during the automatic rewinding and tab-out stages. Especially during tab cutting, the center distance of the tabs is prone to deviation, resulting in uneven electrode arrangement and unstable tab connections during subsequent cell assembly, thus affecting cell performance and yield. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an electrode cutting device that can achieve uniform cutting length.

[0005] This utility model provides an electrode cutting device for cutting a continuous electrode strip. The continuous electrode strip has multiple electrodes evenly distributed along its length. The device includes a cutting component, a conveying component disposed at one end of the cutting component for conveying the continuous electrode strip to the cutting component, and a control component. The control component is electrically connected to the cutting component and the conveying component, and includes a first detection component and a second detection component. The first detection component is disposed close to the cutting component, and the distance between the first detection component and the second detection component is less than the distance between two adjacent electrodes, so that when the first detection component detects an electrode, the second detection component is located between the detected electrode and the adjacent electrode at the rear end. When the first detection component detects that the tab is in place, it controls the conveying assembly to stop conveying and drives the cutting assembly to perform the first cutting. The second detection component is used to determine the length of the tab by combining the length of the tab with that of the adjacent tab at the rear end detected by the first detection component, and then, after the first cutting, it controls the conveying assembly to continue conveying the length of one tab and drives the cutting assembly to perform the second cutting.

[0006] In one embodiment, the cutting assembly includes a guide assembly and a cutting assembly arranged sequentially along the conveying direction. The cutting assembly includes a fixed cutting table, a blade holder that can move relative to the cutting table, and a first cylinder that is pulsatorically connected to the blade holder. The first cylinder is used to drive the blade holder to cut the tab continuous strip on the cutting table.

[0007] In one embodiment, the cutting assembly further includes a pressing portion disposed at one end of the blade holder near the cutting table, the pressing portion being elastically connected to the blade holder and used to press against the continuous tab strip before the blade holder contacts the continuous tab strip.

[0008] In one embodiment, the guiding assembly includes a guide frame, a guide roller and a pressure roller assembly located within the guide frame and disposed opposite to each other, and a second cylinder disposed at one end of the guide frame. The pressure roller assembly is throttle-connected to the second cylinder and is used to approach the guide roller under the drive of the second cylinder.

[0009] In one embodiment, the cutting assembly further includes a connecting rod movably mounted on the blade holder and an elastic member sleeved on the connecting rod, one end of the elastic member abutting against the blade holder and the other end abutting against the pressing part, for generating an elastic clamping force when the pressing part contacts the tab continuous band.

[0010] In one embodiment, the guiding assembly further includes a guide rod movably mounted on the end of the guide frame away from the guide roller, and a guide sleeve installed in the guide frame for cooperating with the guide rod, the guide rod being connected to the pressure roller.

[0011] In one embodiment, the pressure roller assembly includes a roller seat disposed within the guide frame and a roller rotatably disposed within the roller seat, the roller seat being connected to the guide rod.

[0012] In one embodiment, the guiding assembly further includes a guiding plate disposed at one end of the guiding frame, one end of the guiding plate having an arc-shaped clearance groove, the clearance groove being concentrically disposed with the guiding roller, and the top surface of the guiding plate being flush with the tangential surface of the top of the guiding roller.

[0013] In one embodiment, the surfaces of both the guide roller and the pressure roller are coated with rubber or polyurethane.

[0014] This utility model also provides a tab production equipment, including a tab cutting device according to the above embodiment.

[0015] This invention provides an electrode cutting device that achieves precise positioning and length detection of the continuous electrode strip by setting a control component between the cutting component and the conveying component, and configuring a first detection component and a second detection component in the control component. When the first detection component detects that the electrode is in place, the control conveying component stops conveying in time and drives the cutting component to perform the first cut. Subsequently, the second detection component detects the adjacent electrode at the rear end of the electrode detected by the first detection component, and determines the length of the electrode by combining the conveying component and the first detection component. After the first cut, the control conveying component continues to convey the length of one electrode and drives the cutting component to perform the second cut. Through this step-by-step detection and step-by-step cutting method, the cumulative amplification of coating and sheet preparation accuracy errors in the cutting process can be effectively reduced. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an overall structural diagram of a preferred embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the cutting assembly provided in a preferred embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the guide component provided in a preferred embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of the guide plate provided in a preferred embodiment of the present invention.

[0021] Figure label: 1. Cutting assembly; 2. Conveying assembly; 3. Control assembly; 11. Cutting assembly; 12. Guiding assembly; 111. Cutting table; 112. Knife holder; 113. First cylinder; 114. Pressing part; 115. Connecting rod; 116. Elastic element; 121. Guide frame; 122. Guide roller; 123. Second cylinder; 124. Guide rod; 125. Guide sleeve; 126. Roller seat; 127. Roller; 128. Guide plate; 129. Clearance groove. Detailed Implementation

[0022] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0024] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0026] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0027] Please refer to Figure 1 This invention provides an electrode cutting device for cutting continuous electrode strips. The continuous electrode strip is a rolled material with multiple electrodes evenly distributed along its length. The device includes a cutting component 1, a conveying component 2, and a control component 3. The conveying component 2 is installed at one end of the cutting component 1 and is used to convey the continuous electrode strip to the cutting component 1. The control component 3 is electrically connected to both the cutting component 1 and the conveying component 2 for coordinated control of the two.

[0028] The control component 3 includes a first detection component and a second detection component. The first detection component is located near the cutting component 1. It detects the electrode arrival signal when the electrode is conveyed to the cutting position. Upon detecting the signal, the first detection component immediately stops the conveying component 2 and simultaneously drives the cutting component 1 to perform the first cutting action. After the first cutting is completed, the second detection component detects the adjacent electrode at the rear end of the electrode detected by the first detection component. Combining the detection from the conveying component and the first detection component, the second detection component determines the length of the electrode. Then, the second detection component outputs a signal to the control component 3, which drives the conveying component 2 to continue conveying the length of one electrode. Subsequently, it drives the cutting component 1 to perform the second cutting action, completing the cutting of a single electrode.

[0029] In this embodiment, the distance between the second detection component and the first detection component is smaller than the distance between two adjacent tabs, so that when the first detection component detects a tab, the second detection component is located between the detected tab and the adjacent tab at the rear end, and there must be one tab between the first and second detection components. Through the above cyclic operation, the continuous tab strip can be accurately cut into individual tabs segment by segment. The first detection component ensures accurate placement of the tabs and removal of excess material, while the second detection component ensures the accuracy of the cutting length, thereby effectively eliminating the influence of coating and sheet-making errors, making the cut tab length uniform, and improving the consistency and yield of subsequent cell assembly.

[0030] like Figure 2 As shown, the cutting assembly 1 includes a guide assembly 12 and a cutting assembly 11 sequentially along the conveying direction of the tab continuous belt. The guide assembly 12 is used to stably guide the tab continuous belt to the cutting position, ensuring that the continuous belt is straight and accurately positioned when it enters the cutting table 111. The cutting assembly 11 includes a fixedly installed cutting table 111, a blade holder 112 capable of reciprocating relative to the cutting table 111, and a first cylinder 113 that is drively connected to the blade holder 112. The first cylinder 113 is driven by the control assembly 3, causing the blade holder 112 to move up and down in a direction perpendicular to the cutting table 111. When the blade holder 112 moves downward, the blade cooperates with the cutting table 111 to cut the tab continuous belt conveyed to the cutting table 111, completing the cutting action.

[0031] Specifically, in the cutting assembly 11, a pressing part 114 is provided at the end of the tool holder 112 near the cutting table 111. The pressing part 114 is installed on the tool holder 112 via an elastic connection, allowing the pressing part 114 to undergo a slight displacement relative to the tool holder 112 when subjected to external force. When the tool holder 112 moves towards the cutting table 111 under the drive of the first cylinder 113, the pressing part 114 contacts the electrode continuous belt before the cutting tool. During the contact process, the pressing part 114 applies a downward clamping force to the electrode continuous belt under the action of the elastic connector, keeping the electrode continuous belt tightly attached to the cutting table 111 before cutting. As the tool holder 112 presses down further, the cutting tool contacts the electrode continuous belt and performs the cutting action.

[0032] By applying pressure beforehand, the continuous belt with tabs is effectively fixed before the cutter enters, preventing the belt from warping or shifting due to conveyor inertia or slack, thus ensuring the neatness of the cutting line and the accuracy of the cutting dimensions. Simultaneously, the elastic connection structure provides a buffering effect during the pressure process, preventing damage to the surface of the continuous belt and further improving the cutting quality.

[0033] like Figure 3 As shown, the guiding assembly 12 includes a guiding frame 121, inside which are arranged a guiding roller 122 and a pressure roller assembly, and a second cylinder 123 is located at one end of the guiding frame 121. The pressure roller assembly is connected to the piston rod of the second cylinder 123 and can move towards the guiding roller 122 under the drive of the second cylinder 123. During the conveying of the tab continuous belt, the second cylinder 123 is in the extended state, and the pressure roller assembly is pushed to a position close to the guiding roller 122, forming a clamping channel between them. The tab continuous belt enters the cutting table 111 area through this clamping channel, achieving smooth guidance. When it is necessary to release the continuous belt, the second cylinder 123 retracts, driving the pressure roller assembly away from the guiding roller 122, releasing the clamping channel, facilitating the insertion or adjustment of the continuous belt.

[0034] The guide roller 122, in conjunction with the pressure roller assembly, limits and corrects the continuous belt around the tabs, ensuring that the belt runs in a straight line during transport and preventing inaccurate cutting positions due to belt vibration or offset. Driven by the second cylinder 123, the pressure roller assembly can automatically clamp and release, ensuring stability during cutting and facilitating maintenance and belt threading.

[0035] Preferably, in the cutting assembly 11, the pressing part 114 is connected to the blade holder 112 via an elastic connection structure. This elastic connection structure includes a connecting rod 115 movably mounted on the blade holder 112, and an elastic element 116 (e.g., a spring) sleeved around the connecting rod 115. One end of the elastic element 116 is fixedly abutted against the blade holder 112, and the other end abuts against the pressing part 114.

[0036] During the cutting process, when the first cylinder 113 drives the tool holder 112 to move towards the cutting table 111, the pressing part 114 first contacts the continuous strip of the tab, and under the reaction force of the continuous strip of the tab, the connecting rod 115 undergoes a slight displacement relative to the tool holder 112. As a result, the elastic element 116 is compressed, thereby forming a stable elastic clamping force between the pressing part 114 and the continuous strip of the tab. Then the tool continues to move downward, completing the cutting of the continuous strip of the tab.

[0037] In this embodiment, a guide rod 124 is provided at the end of the guide frame 121 away from the guide roller 122. The guide rod 124 is movably installed inside the guide frame 121 and connected to the pressure roller. The guide frame 121 is also provided with a guide sleeve 125 for cooperating with the guide rod 124, and the guide rod 124 passes through the guide sleeve 125. The piston rod of the second cylinder 123 is connected to the guide rod 124. When the second cylinder 123 is activated, the pressure roller is driven to move closer to or away from the guide roller 122 through the guide rod 124. Since the guide rod 124 passes through the guide sleeve 125, it is always limited and constrained by the guide sleeve 125 during its movement, thereby ensuring that the movement of the guide rod 124 and the pressure roller is smooth and will not swing or deviate.

[0038] Specifically, the pressure roller assembly includes a roller seat 126 disposed within a guide frame 121, which is connected to a second cylinder 123 via a guide rod 124. A roller 127 is rotatably mounted inside the roller seat 126, serving as the main body of the pressure roller and cooperating with the guide roller 122 to form a clamping channel. Driven by the second cylinder 123, the roller seat 126 drives the roller 127 to move towards the guide roller 122. When the roller 127 is in contact with the guide roller 122, the continuous strip with the tabs is stably clamped and guided to the cutting table 111 area. When it is necessary to release the strip, the second cylinder 123 retracts, and the roller seat 126 and roller 127 retract as a whole, releasing the clamping channel.

[0039] Through the cooperation of roller seat 126 and roller 127, the pressure roller assembly possesses the dual functions of overall movement and partial rotation: on the one hand, the overall movement of roller seat 126 realizes the pressing and releasing actions; on the other hand, roller 127 can rotate freely during strip conveying, reducing frictional resistance with the tab continuous belt, avoiding damage to the strip surface, and ensuring smooth strip conveying. Therefore, the pressure roller assembly can not only achieve automatic clamping and release, but also provide low-friction guiding support during conveying, improving the conveying stability and positional accuracy of the tab continuous belt before entering the cutting table 111.

[0040] like Figure 4As shown, in this embodiment, a guide plate 128 is provided at one end of the guide frame 121 of the guide assembly 12. The guide plate 128 is fixedly installed at the entrance position of the guide frame 121 to assist the continuous strip of the tabs in entering the clamping area formed by the guide roller 122 and the pressure roller. One end of the guide plate 128 is machined with an arc-shaped relief groove 129, which is concentrically arranged with the guide roller 122. Since the curvature of the relief groove 129 matches the outer circular surface of the guide roller 122, when the continuous strip of the tabs slides along the surface of the guide plate 128, its movement trajectory can naturally fit with the outer circle of the guide roller 122. At the same time, the top surface of the guide plate 128 is flush with the tangent surface of the top of the guide roller 122, so that the continuous strip of the tabs can smoothly transition to the working surface of the guide roller 122 before entering the clamping area, avoiding problems such as warping or wrinkling due to height difference or poor transition.

[0041] Optionally, both the guide roller 122 and the pressure roller are covered with a layer of elastic material, which can be rubber or polyurethane. During the continuous belt conveying process, the belt passes sequentially through the clamping channel formed by the guide roller 122 and the pressure roller. Since the surface of the roller 127 has a certain degree of elasticity, it can not only provide flexible compression to the belt, but also effectively absorb minor impacts during the conveying process, preventing the belt surface from being damaged by the hard roller.

[0042] Rollers 127 with rubber or polyurethane coatings significantly improve the coefficient of friction, ensuring stable clamping and driving of the belt during conveying. Simultaneously, the flexibility and wear resistance of the coatings extend their service life, maintaining stable guiding and conveying performance even under high-speed operation or prolonged working conditions.

[0043] This utility model embodiment also provides a tab production equipment, including a tab cutting device of the above embodiment.

[0044] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0045] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. An electrode cutting device for cutting a continuous electrode strip, wherein the continuous electrode strip has a plurality of electrodes evenly distributed along its length, characterized in that, It includes a cutting assembly (1), a conveying assembly (2) disposed at one end of the cutting assembly (1) for conveying the continuous strip of tabs to the cutting assembly (1), and a control assembly (3). The control component (3) is electrically connected to the cutting component (1) and the conveying component (2), and includes a first detection component and a second detection component. The first detection component is disposed close to the cutting component (1), and the distance between the first detection component and the second detection component is less than the distance between two adjacent tabs, so that when the first detection component detects the tab, the second detection component is located between the detected tab and the adjacent tab at the rear end. When the first detection component detects that the tab is in place, it controls the conveying component (2) to stop conveying and drives the cutting component (1) to perform the first cutting. The second detection component is used to determine the length of the tab by combining the conveying component (2) and the first detection component with the adjacent tab at the rear end of the tab detected by the first detection component. After the first cutting, it controls the conveying component (2) to continue conveying the length of one tab and drives the cutting component (1) to perform the second cutting.

2. The electrode cutting device as described in claim 1, characterized in that, The cutting assembly (1) includes a guide assembly (12) and a cutting assembly (11) arranged sequentially along the conveying direction. The cutting assembly (11) includes a fixed cutting table (111), a knife holder (112) that can move relative to the cutting table (111), and a first cylinder (113) that is pulverizedly connected to the knife holder (112). The first cylinder (113) is used to drive the knife holder (112) to cut the tab continuous strip on the cutting table (111).

3. The electrode cutting device as described in claim 2, characterized in that, The cutting assembly (11) further includes a pressing part (114) disposed at one end of the blade holder (112) near the cutting table (111), the pressing part (114) being elastically connected to the blade holder (112) and used to press against the continuous strip of the tab before the blade holder (112) comes into contact with the continuous strip of the tab.

4. The electrode cutting device as described in claim 2, characterized in that, The guide assembly (12) includes a guide frame (121), a guide roller (122) and a pressure roller assembly located inside the guide frame (121) and disposed opposite to each other, and a second cylinder (123) disposed at one end of the guide frame (121). The pressure roller assembly is drivenly connected to the second cylinder (123) and is used to approach the guide roller (122) under the drive of the second cylinder (123).

5. The electrode cutting device as described in claim 3, characterized in that, The cutting assembly (11) further includes a connecting rod (115) movably mounted on the blade holder (112) and an elastic element (116) sleeved on the connecting rod (115). One end of the elastic element (116) abuts against the blade holder (112) and the other end abuts against the pressing part (114), and is used to generate an elastic clamping force when the pressing part (114) contacts the tab continuous belt.

6. The electrode cutting device as described in claim 4, characterized in that, The guide assembly (12) further includes a guide rod (124) movably mounted on the end of the guide frame (121) away from the guide roller (122), and a guide sleeve (125) installed in the guide frame (121) for cooperating with the guide rod (124), the guide rod (124) being connected to the pressure roller.

7. The electrode cutting device as described in claim 6, characterized in that, The pressure roller assembly includes a roller seat (126) disposed in the guide frame (121) and a roller (127) rotatably disposed in the roller seat (126), the roller seat (126) being connected to the guide rod (124).

8. The electrode cutting device as described in claim 7, characterized in that, The guide assembly (12) further includes a guide plate (128) disposed at one end of the guide frame (121). One end of the guide plate (128) is provided with an arc-shaped clearance groove (129). The clearance groove (129) is concentrically disposed with the guide roller (122). The top surface of the guide plate (128) is flush with the cut surface of the top of the guide roller (122).

9. The electrode cutting device as described in claim 7, characterized in that, The surfaces of the guide roller (122) and the pressure roller are both covered with rubber or polyurethane.

10. A tab production device, characterized in that, Includes an electrode cutting device as described in any one of claims 1-9.

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