Lithium battery tab cutting and OCV measuring comprehensive equipment

Abstract

The utility model relates to comprehensive equipment for lithium battery tab cutting and OCV measurement, which is characterized in that an adjusting plate is arranged on tab cutting equipment, so that the length of a tab can be adjusted, or different types of battery cells can be adjusted, and the applicability of the equipment to different product requirements is increased; the waste tank is arranged at the bottom of the rack, so that collection, classification and recovery of positive and negative electrode lug waste are facilitated, and the cost is saved; the positioning structure and the sensor are mounted on the cutting equipment, so that the operability and the safety are improved; the probes are installed on the outer sides of the left cutter and the right cutter, the probes are connected with external OCV measuring equipment through the cables, the probes move along with movement of the cutters, and an OCV test is carried out on the battery cell placed on the machine base in the cutting process.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery detection, in particular to a comprehensive device for lithium battery tab cutting and OCV measurement. Background Art

[0002] During the manufacturing process of soft-pack lithium batteries, the positive and negative tabs in the battery cells need to be cut into fixed shapes to facilitate their subsequent bending and setting, and to connect with wires, and also to facilitate OCV testing.

[0003] Among them, the workbench of the current positive and negative tab cutting machine has a fixed structure. After the battery cell is placed in a fixed slot, the positive and negative tabs are cut by the cutter. However, this fixed workbench structure cannot be effectively adjusted and cannot meet the cutting needs of different battery cell models.

[0004] In addition, OCV testing primarily measures battery characteristics by pressing probes connected to a voltage tester and an internal resistance tester against the positive and negative tabs of a soft-pack battery. Currently, incoming battery cells undergo OCV testing in a separate process. Workers manually place the batteries in a test device, where the probes contact the positive and negative tabs, performing an OCV test. The batteries are then manually unloaded and sorted. This semi-automated OCV testing method is inefficient and cannot meet the needs of rapid batch testing services. Utility Model Content

[0005] The purpose of the present invention is to provide a comprehensive device for cutting lithium battery tabs and measuring OCV, so as to solve the problems encountered in the above-mentioned background technology.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A comprehensive device for cutting and measuring the OCV of lithium battery tabs includes a base and a frame. The frame is vertically mounted on one side of the base, and is equipped with cutters for cutting the positive and negative tabs. Unlike existing technology, probes are mounted on the outsides of the two cutters, connected to external OCV measurement equipment via cables. The probes move with the cutters, performing OCV testing on the battery cells placed on the base during the cutting process. A positioning plate is provided on one side of the base, and an adjustment plate is provided on the front of the base that can be adjusted forward and backward.

[0008] In the above solution, the adjustment plate and positioning plate are arranged perpendicularly in the installation direction. The adjustment plate has at least two grooves formed in its body, and the adjustment plate is connected to the base via positioning screws installed in these grooves. A semicircular hand grip is provided on the other side of the base; support legs are provided at each of the four ends of the base's bottom. Battery sensors are mounted on the side of the positioning plate closest to the battery cell mounting surface and on the top battery cell mounting surface of the base.

[0009] In the above embodiment, a cylinder is mounted on the top of the frame, a connecting plate for connecting the two cutting blades is mounted inside the frame, and the cylinder is in vertical transmission connection with the two cutting blades. Two waste troughs are mounted on the bottom of the frame, and the waste troughs are respectively located directly below the cutting blades.

[0010] As a preferred solution, a protective sensor is mounted on one side of the bottom of the frame, with its active end facing outward from the cutter. A waste barrier is also mounted on the outside of the frame to seal the cutter within. The barrier is a transparent rectangular structure with screws mounted at each of its four corners.

[0011] In the above scheme, the probe includes a probe body and a probe head. The probe head is installed at the bottom working end of the probe body. The middle part of the probe body is connected to the cutter through a hanging plate. A reset spring elastically connected to the probe body is installed on the hanging plate. The top of the probe body is connected to a test line, and the test line is connected to an external OCV measuring device. A wiring harness tube for the test line to pass through is installed at the rear of the rack.

[0012] As a preferred solution, a support is installed on one side of the top of the frame, and the support is connected to a barcode scanning camera through a universal gooseneck tube. The working port of the barcode scanning camera faces the barcode on the battery cell body, and the barcode scanning camera is connected to an external OCV measuring device through a cable.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting an adjustment plate on the tab cutting equipment, the tab length is retained to be adjustable, or the tab length can be adjusted to different types of battery cells, thereby increasing the applicability of the equipment to different product requirements; by setting a waste trough at the bottom of the frame, the collection, classification and recycling of positive and negative tab waste are facilitated, thereby saving costs; by installing a positioning structure and the use of sensors on the cutting equipment, operability and safety are improved; by installing probes on the outside of the left and right cutters, the probes are connected to an external OCV measuring device through a cable, and the probes move with the movement of the cutters, and the battery cells placed on the machine base are subjected to OCV testing during the cutting process. By setting a barcode scanning camera and aiming it at the barcode on the battery cell, the binding of the battery cell and module barcode and the autonomous determination of group performance requirements are completed in conjunction with the background MES, reducing the need for personnel operation, optimizing the process, reducing costs and increasing production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the utility model when it is implemented;

[0018] Figure 4 for Figure 3 Schematic diagram of the structure after removing the waste discharge partition.

[0019] Numbers in the figure: 1-base; 11-positioning plate; 12-adjustment plate; 13-waist groove; 14-hand buckle position; 15-battery cell sensor; 16-support leg; 17-protection sensor; 18-waste trough; 2-frame; 21-cylinder; 22-connecting plate; 23-cutter; 24-waste discharge partition; 25-support; 26-code scanning camera; 3-probe; 31-probe body; 32-hanging plate; 33-probe; 34-test line; 35-wire harness tube; 4-battery cell; 41-ear; 42-barcode. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention will now be further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the relevant components of the present invention.

[0021] According to the technical solution of the present invention, without changing the essential spirit of the present invention, those skilled in the art may propose a variety of interchangeable structural methods and implementation methods. Therefore, the following specific embodiments and drawings are merely illustrative of the technical solution of the present invention and should not be regarded as the entire present invention or as a limitation or restriction of the technical solution of the present invention.

[0022] The technical solution of the present utility model is further described in detail below with reference to the accompanying drawings and embodiments.

[0023] Example 1, as Figure 1As shown, a comprehensive device for cutting lithium battery tabs and measuring OCV includes a base 1 and a frame 2. The frame 2 is vertically installed on the top side of the base 1. A cutter 23 for cutting the positive tabs and negative tabs is installed on the frame 2. One cutter 23 cuts the positive tabs, and the other cutter 23 cuts the negative tabs.

[0024] Specifically, a cylinder 21 is installed on the top of the frame 2, and a connecting plate 22 connecting two cutters 23 is installed inside the frame 2. The cylinder 21 is connected to the two cutters 23 in a vertical direction. Figure 3 Under the drive of the cylinder 21, the left and right cutters 23 are driven to cut the tabs 41 after the battery cell 10 is placed. Through one stamping, the cutters 23 can be used to punch out the shapes of the positive and negative tabs. This method is also a common method for cutting the tabs 41.

[0025] Compared to existing equipment, this device features probes 3 installed on the outsides of the left and right cutters 23. These probes are connected to an external OCV measuring device via cables. These probes move with the cutters 23, performing OCV testing on the battery cells placed on the base 1 during the cutting process. By adding probes 3 to the positive and negative cutters 23 of the tab cutting equipment, the probes 3 are connected to the test harness of a voltage and internal resistance tester according to their polarity, triggering the OCV test of the battery cells as the tabs are cut.

[0026] In addition, a positioning plate 11 is provided on one side of the machine base 1, and an adjustment plate 12 that can be adjusted forward and backward is provided on the front of the machine base 1 for matching different types of battery cells 4. The adjustment plate 12 at the bottom of the battery cell 4 of the tab cutting equipment can also be adjusted to adjust the tab cutting retention length according to product requirements.

[0027] Specifically, the adjustment plate 12 and the positioning plate 11 are arranged perpendicularly in the installation direction, with the positioning plate 11 installed longitudinally and the adjustment plate 12 installed transversely. The adjustment plate 12 has at least two grooves 13 defined in the body thereof. The adjustment plate 12 is connected to the machine base 1 via set screws installed in the grooves 13. The heads of the set screws can press against the upper portions of the grooves 13 to secure the adjustment plate 12 to the machine base 1. Alternatively, a gasket connected to the adjustment plate 12 can be placed at the bottom of the grooves 13 and tightened with the set screws to secure the adjustment plate 12 to the machine base 1.

[0028] In Example 2, based on Example 1, a hand grip 14 is provided on the other side of the base 1 relative to the positioning plate 11. This hand grip 14 is a semicircular structure that facilitates the removal of the cut and tested battery cells 4, facilitating the placement and removal of the battery cells 4 without interference. Support legs 16 are provided at each of the four ends of the base 1. These legs are made of rubber material, ensuring flexible contact with the work surface.

[0029] Cell sensors 15 are mounted on one side of the positioning plate 11 near the cell mounting surface and on the top cell mounting surface of the base 1. These sensors detect whether the cell 4 is installed on the base 1. If so, they transmit a signal to the PLC or MES system, which then drives the cylinder 21 under its control. Cell sensors 15 are added to the bottom and sides of the cell 4 positioning area; if a cell 4 is not detected, cutting cannot be triggered.

[0030] In order to facilitate the collection of waste generated by the cutter 23 during the cutting process, two waste troughs 18 are installed at the bottom of the frame 2 to receive the waste of the positive tab and the negative tab respectively. The waste troughs 18 are located directly below the cutter 23. When the cutter 23 is working, the waste generated will enter the waste trough 18. The tab cutting equipment retains waste discharge channels and waste troughs 18 corresponding to the positive and negative electrode cutting positions to avoid mixing of positive electrode (aluminum) and negative electrode (copper-plated nickel) waste, which is convenient for recycling.

[0031] As a preferred solution, a protective sensor 17 is mounted on one side of the bottom of the frame 2, with the working end of the protective sensor 17 facing outward from the cutter 23. The protective sensor 17 primarily detects whether the tab 41 is properly installed. When the tab 41 is detected, it also drives the cylinder 21 to move normally. The provision of the protective sensor 17 and the provision of the battery cell sensor 15 complement each other.

[0032] See also Figure 3 and Figure 4 A waste barrier 24 is mounted on the outside of the frame 2 to seal the cutter 23 within. The waste barrier 24 is a transparent rectangular structure with screws mounted at the four corners of the waste barrier 24. The waste barrier 24 blocks the waste generated by the cutter 24 when cutting the tab 41, allowing it to flow smoothly into the waste chute 18 directly below.

[0033] A transparent waste barrier 24 and a protective sensor 17 are added to the outside of the frame 2 to serve as a protective baffle. When the protective sensor 17 detects foreign matter, the cutting operation cannot be triggered.

[0034] Example 3, please refer to Figure 2 Based on Example 1, the probe 3 includes a probe body 31 and a probe 33. The probe 33 is installed at the bottom working end of the probe body 31. The middle part of the probe body 31 is connected to the cutter 23 through a hanging plate 32. A return spring elastically connected to the probe body 31 is installed on the hanging plate 32 to facilitate restoring the probe body 31 to its original position when the cutter 23 is punching.

[0035] The top of the probe body 31 is connected to a test line 34, which connects to an external OCV measurement device. The OCV measurement device collects the detection results when the probe 33 contacts the tab 41. A wiring harness 35 is installed at the rear of the rack 2 for the test lines 34 to pass through. This prevents excessive wiring in the front of the rack 2 from affecting testing. All test lines 34 are connected to the probe body 31 from the rear of the rack 2.

[0036] Example 4, please refer to Figure 1 and Figure 3 Based on Example 1, a support 25 is installed on one side of the top of the frame 2. The support 25 is connected to a code scanning camera 26 through a universal gooseneck tube. The working port of the code scanning camera 26 faces the barcode 42 on the battery body. The code scanning camera 26 is connected to an external OCV measuring device through a cable.

[0037] The universal gooseneck tube can arbitrarily adjust the shooting angle of the barcode scanning camera 26 so that it is exactly aligned with the barcode 42 placed on the battery cell 10, thereby transmitting the captured image to the OCV measurement equipment and finally identifying the data information.

[0038] The MES automatically generates module barcodes based on work order requirements and relevant process standards. When the first piece of work is started or the previous set of module barcodes is bound, a barcode printer prints the module barcode to be bound and affixes it to the battery cell 4 to form barcode 42. When the battery cell 4 is placed at the tab cutting equipment's location, the barcode is scanned and entered into the MES via the barcode scanning camera 26, completing the binding of the cell barcode and module barcode.

[0039] In the background system, the OCV test software and MES collect relevant test data from the voltage and internal resistance tester, and make OCV performance judgments in accordance with relevant performance process standards and battery cell grouping requirements. When testing battery cells that do not meet the grouping requirements, the system prompts and buzzers an alarm, indicating an abnormality and suspending scanning.

[0040] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A comprehensive device for cutting lithium battery tabs and measuring OCV, comprising a base (1) and a frame (2), wherein the frame (2) is vertically mounted on one side of the top of the base (1), and a cutter (23) for cutting positive tabs and negative tabs is mounted on the frame (2), characterized in that: Probes (3) are installed on the outside of the two cutting knives (23), and the probes (3) are connected to an external OCV measuring device through a cable. The probes (3) move with the movement of the cutting knives (23), and perform OCV testing on the battery cells placed on the machine base (1) during the cutting process; a positioning plate (11) is provided on one side of the machine base (1), and an adjustment plate (12) that can be adjusted forward and backward is provided on the front of the machine base (1).

2. The integrated equipment for lithium battery tab cutting and OCV measurement according to claim 1, characterized in that: The adjusting plate (12) and the positioning plate (11) are arranged perpendicularly in the installation direction. The adjusting plate (12) is provided with at least two waist grooves (13) on its plate body. The adjusting plate (12) is connected to the machine base (1) by installing positioning screws in the waist grooves (13).

3. The integrated equipment for lithium battery tab cutting and OCV measurement according to claim 2, characterized in that: A hand buckle position (14) is provided on the other side of the machine base (1), and the hand buckle position (14) is a semicircular structure; and support legs (16) are respectively provided at the four ends of the bottom of the machine base (1).

4. The integrated equipment for lithium battery tab cutting and OCV measurement according to claim 1, characterized in that: Battery cell sensors (15) are respectively installed on one side of the positioning plate (11) close to the battery cell installation surface and on the top battery cell installation surface of the machine base (1).

5. The integrated equipment for lithium battery tab cutting and OCV measurement according to claim 1, characterized in that: A cylinder (21) is installed on the top of the frame (2), and a connecting plate (22) connecting the two cutting knives (23) is installed inside the frame (2). The cylinder (21) is connected to the two cutting knives (23) in a vertical direction.

6. The integrated equipment for lithium battery tab cutting and OCV measurement according to claim 5, characterized in that: Two waste troughs (18) are installed at the bottom of the frame (2), and the waste troughs (18) are respectively located directly below the cutting blades (23).

7. The integrated equipment for lithium battery tab cutting and OCV measurement according to claim 6, characterized in that: A protective sensor (17) is installed on one side of the bottom of the frame (2), and the working end of the protective sensor (17) faces the outside of the cutter (23).

8. The integrated equipment for lithium battery tab cutting and OCV measurement according to claim 6, characterized in that: A waste discharge partition (24) is also installed on the outside of the frame (2) to seal the cutter (23) inside. The waste discharge partition (24) is a transparent rectangular structure, and fixing screws are respectively installed at the four end angles of the waste discharge partition (24).

9. The integrated equipment for lithium battery tab cutting and OCV measurement according to claim 1, characterized in that: The probe (3) comprises a probe body (31) and a probe head (33), wherein the probe head (33) is mounted at the bottom working end of the probe body (31), the middle portion of the probe body (31) is connected to the cutter (23) via a hanging plate (32), a return spring elastically connected to the probe body (31) is mounted on the hanging plate (32), the top of the probe body (31) is connected to a test line (34), and the test line (34) is connected to an external OCV measuring device; and a wiring harness tube (35) for the test line (34) to pass through is mounted at the rear of the frame (2).

10. The integrated equipment for lithium battery tab cutting and OCV measurement according to claim 1, characterized in that: A support (25) is installed on one side of the top of the frame (2), and the support (25) is connected to a barcode scanning camera (26) through a universal gooseneck tube. The working port of the barcode scanning camera (26) faces the barcode on the battery body, and the barcode scanning camera (26) is connected to an external OCV measuring device through a cable.

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