Device for detecting tab folding and flattening tab

Abstract

The utility model provides a device for detecting tab folding and tab flattening, which comprises a tab folding detection assembly and a flattening welding assembly, the tab folding detection assembly is connected with the flattening welding assembly through a PLC (programmable logic controller), the tab folding detection assembly is provided with a plurality of sensors, and the sensors are connected with the flattening welding assembly. The smoothing and welding assembly comprises a smoothing guide mechanism and a welding mechanism, and the smoothing guide mechanism is connected with the welding mechanism through a PLC. The device disclosed by the utility model has low requirements on installation environment and no special material and installation requirements, the size of the installation position and the fixing mode can be adjusted according to the actual design on site, and the installation position is placed before ultrasonic welding, so that the problem that the tab is folded in the cutting and rolling-ultrasonic process is solved, the occurrence of a battery cell with the tab folded is effectively reduced, and the production efficiency is improved. The scrap of the battery cell is reduced, the product quality is ensured, and the performance of the battery cell is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery cell manufacturing, in particular to a device for detecting the folding and flattening of the tab. BACKGROUND

[0002] During the process assembly of the lithium battery roll core, the tab may be folded due to the material factor and the influence of the mechanical structure operation in each process when it is transferred to ultrasonic welding. The current device for detecting the folding of the tab is generally installed in the cutting process, for example, the Chinese utility model patent document with publication number CN216927111U discloses a tab folding detection device, which includes a tab with multiple tabs arranged along the length direction, a cutter arranged along the winding direction of the tab, and a sensor device arranged on one side of the tab to detect whether the tab is folded after being cut by the cutter. The end of the sensor device away from the tab is provided with an adjusting mechanism to adjust the position of the sensor device. After the cutting process, the sensor or CCD device is used to detect whether the tab is folded. Therefore, there is a lack of process for detecting the folding and flattening of the tab before the tab welding in the assembly process. Only in a few cases, a separate process is set up after the assembly process to detect whether the tab is folded or to flatten the tab.

[0003] The existing technology mostly uses the CCD device to detect the folding of the tab from the cutting process to the assembly process. The CCD device has high cost and needs to consider the installation environment and position. Therefore, it may be difficult to add due to the difficulty of production line modification, and manual inspection is needed to check the tab folding. Manual inspection may miss some roll cores, which affects the performance of the battery and causes a lot of rework in production.

[0004] Therefore, there is a lack of device for detecting whether the tab is folded and flattening the tab in the mature production line and assembly process. The existing device for detecting whether the tab is folded and the device for flattening the tab have high requirements for the installation environment, and the installation position and fixing method cannot be adjusted according to the actual production line. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem of how to add a device for detecting whether the tab is folded and flattened in the assembly process, which can be adjusted according to the actual production line.

[0006] The utility model solves the above technical problems by the following technical means:

[0007] The utility model provides a kind of for detecting tab fold and tab smoothing device, including tab fold detection component and smoothing welding component, the tab fold detection component is connected with smoothing welding component by PLC, the tab fold detection component is provided with multiple sensors, the smoothing welding component includes smoothing guide mechanism and welding mechanism, the smoothing guide mechanism is connected with welding mechanism by PLC.

[0008] Beneficial effects: the utility model discloses a sensor detects whether tab appears the condition of folding, and the structure of sensor detection is transmitted signal by PLC, whether tab is smoothed, avoids the welding caused by tab folding Leaking;If tab needs to be smoothed, tab is smoothed by smoothing guide mechanism, and then welding is carried out, effectively solve the situation of missing detection in the process of personnel visual inspection, avoid unnecessary movement of roll core in process to cause rework, improve battery quality.

[0009] The device of the utility model has low installation environment requirement, no special material and installation requirement, and the installation position and fixing mode can be designed and adjusted in size according to the actual situation on site, the installation position is placed before ultrasonic welding, the tab folding in the process of cutting roll-ultrasonic wave is solved, the appearance of tab folding battery is effectively reduced, the scrap of battery is reduced, the product quality is guaranteed, and the performance of battery is more stable.

[0010] Preferably, the tab folding detection component includes a machine table fixing frame and a sensor support, the sensor support is connected with the machine table fixing frame, and the sensor is fixed on the sensor support.

[0011] Preferably, the sensor support is provided with a first square groove at the bottom, and the sensor support is fixed on the machine table fixing frame through the square groove.

[0012] Beneficial effects: the utility model is fixed through the first square groove, can be fine-tuned up and down and left and right, so that the position and angle of the tab folding detection component can be adjusted according to the actual tab folding direction.

[0013] Preferably, the smoothing guide mechanism is a wedge-shaped block, and the inclined surface of the wedge-shaped block is provided with a plurality of blow holes with the same spacing.

[0014] Beneficial effects: the utility model sets a blow hole on the inclined surface of the wedge-shaped block, can blow air from the root of the tab upwards, realize the tab folding floating upwards, realize tab smoothing, and then welding.

[0015] Preferably, the welding mechanism includes an ultrasonic welding bottom plate and a welding head, the welding head passes through the ultrasonic welding bottom plate and can move up and down.

[0016] Preferably, the smoothing guide mechanism is connected with the fixed block, the fixed block is provided with a second square groove, and the fixed block is fixed at the bottom of the welding head through the second square groove.

[0017] Beneficial effects: the second square groove is fixed, and fine adjustment can be realized in up, down, left and right directions, so that the blowing direction of the smoothing guide mechanism can be adjusted according to the actual tab folding direction.

[0018] Preferably, the number of sensor supports is same as the number of sensors, and the sensors are fixed on the top of the sensor supports.

[0019] Preferably, the smoothing guide mechanism is arranged side by side with the welding head, and the number of smoothing guide mechanisms is same as the number of welding mechanisms.

[0020] Preferably, the bottom of the sensor support is provided with a plurality of first square grooves.

[0021] Beneficial effects: the plurality of first square grooves arranged at the bottom of the sensor support can adjust the height of the sensors on the top of the sensor support, so as to better identify whether the tab is folded.

[0022] Preferably, the wedge-shaped block is connected with the air pipe, and the air pipe is provided with a pressure regulating valve and an electromagnetic valve controlled by PLC.

[0023] Beneficial effects: the electromagnetic valve is opened and closed by PLC control, so as to control the blowing time, and the pressure regulating valve is controlled by PLC to control the blowing flow, so as to realize controllable blowing time and wind speed flow.

[0024] The device has the advantages that:

[0025] During the operation of the device, the plurality of sensors can detect the tabs of the two battery cells, the sensors feed back whether the tabs are folded to the PLC, when the tabs of the battery cells are folded, the PLC executes the opening of the air pipe through the electromagnetic valve, the wind speed is controlled through the adjusting valve, the inclined surface blowing hole of the smoothing guide mechanism blows air from the tab root to the top, realizes the tab folding upward floating, and then welding is performed, when welding, the air pipe is closed by the PLC control electromagnetic valve, so as to ensure that no air is blown during the welding process, and effectively ensure that the welding slag or dust enters the inside of the battery cell; when the tabs of the battery cells are not folded, the battery cells normally flow into the welding mechanism, and welding can be performed. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structure schematic view of a tab folding detection and tab smoothing device in the embodiment;

[0027] Figure 2 is a structure schematic view of a tab folding detection assembly in the embodiment;

[0028] Figure 3 is a structure schematic diagram of the smoothing welding assembly in the embodiment;

[0029] Figure 4 is a three-view diagram of the smoothing guide mechanism in the embodiment. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0031] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. It should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] According to Figures 1-4 As shown in FIG. 1, the present embodiment provides a kind of for detecting tab folding and tab smoothing device, including tab folding detection component 10 and smoothing welding assembly 20, tab folding detection component 10 with smoothing welding assembly 20 is connected by PLC, the tab 31 of electric core 30 is first detected whether tab 31 appears folding by sensor 13 by tab folding detection component 10 by sensor 13, sensor 13 will feedback transmission PLC, it is carried out by PLC control smoothing welding assembly 20 whether smoothing or welding.

[0033] The lug folding detection assembly 10 comprises a machine fixed frame 11 and a sensor support 12, the bottom of the sensor support 12 is provided with a first square groove 121, a plurality of first square grooves 121 are arranged according to actual conditions, the sensor support 12 of the embodiment is provided with one first square groove 121, and is fixed on the surface of the machine fixed frame 11 through the first square groove 121, the sensor support 12 is perpendicular to the machine fixed frame 11, and the sensor support 12 is fixed through the first square groove 121, so that it can be finely adjusted up, down, left and right, so that the position and angle of the lug folding detection assembly 10 can be adjusted according to the actual lug folding direction by adjusting the first square groove 121. The surface of the machine fixed frame 11 is fixedly connected with four sensor supports 12, and four sensors 13 are fixed at the top of the four sensor supports 12; the lug folding detection assembly 10 of the embodiment can detect two electric cores 30 at a time, and the four lugs 31 of the two electric cores pass above the sensors 13, the sensors 13 can quickly detect whether the lugs 31 are folded, and then feedback is transmitted to the PLC.

[0034] The flattening welding assembly 20 comprises a flattening guide mechanism 22 and a welding mechanism, and the flattening guide mechanism 22 is connected with the welding mechanism through the PLC. The flattening guide mechanism 22 is a wedge-shaped block, the inclined surface of the wedge-shaped block is provided with a plurality of blow holes (not marked in the figure) with the same spacing, the wedge-shaped block is connected with an air pipe (not shown in the figure), the air pipe is provided with a pressure regulating valve (not shown in the figure) and an electromagnetic valve (not shown in the figure) controlled by the PLC, the opening and closing of the electromagnetic valve are controlled through the PLC, and the size of the pressure regulating valve is adjusted through the PLC to adjust the blow speed.

[0035] The welding mechanism comprises an ultrasonic welding bottom plate 21 and a welding head 23, the welding head 23 penetrates through the ultrasonic welding bottom plate 21 and can move up and down, when the lugs 31 of the electric cores 30 are welded, the welding head 23 rises to a suitable position to weld the lugs 31. The flattening guide mechanism 22 is connected with a fixed block 24, the fixed block 24 is provided with a second square groove 241, and the fixed block 24 is fixed at the bottom of the welding head 23 through the second square groove 241, so that the lifting of the welding head 23 does not interfere with the fixed block 24, and the fixed block 24 can be finely adjusted up, down, left and right through the second square groove 241, so that the blow direction of the flattening guide mechanism 22 can be adjusted according to the actual folding direction of the lugs 31 by adjusting the second square groove 241.

[0036] The flattening guide mechanism 22 is provided with two, the welding mechanism is provided with two, according to Figure 1As shown, the flow direction of the battery cell 30 is from left to right, so the flattening guide mechanism 22 is arranged on the left of the welding head 23, so that the flattening and welding assembly 20 can flatten and weld the two tab 31 of the battery cell 30 at one time, according to the flow direction, the two battery cell 30 first pass through the tab folding detection assembly 10, then pass through the flattening guide mechanism 22, and finally come to the welding mechanism for welding, improving the efficiency of the tab 31 detection and welding of the battery cell 30.

[0037] The working principle of the tab folding and flattening device for detecting the tab folding and flattening device of the embodiment is as follows:

[0038] When the device of the embodiment is in operation, the two battery cell 30 are moved to the upper part of the tab folding detection assembly 10 by the jig, whether the four tabs 31 are folded is detected by the four sensors 13, the sensor 13 feeds back to the PLC, when the tabs 31 of the two battery cell 30 are not folded, the PLC controls to close the electromagnetic valve of the air pipe, so that the wedge-shaped block cannot blow air, at this time the tabs 31 of the battery cell 30 directly come to the welding mechanism for welding; when the tabs 31 of the battery cell 30 are folded, the PLC controls to open the electromagnetic valve of the air pipe, so that the wedge-shaped block inclined surface blow hole blows air, the PLC adjusts the size of the blow flow by controlling the pressure regulating valve, the air blows from the root of the tab 31 upward, realizes the upward floating of the tab 31 folding, flattens the tab 31, then the PLC controls to close the electromagnetic valve of the air pipe, enters the welding mechanism for welding, ensures that there is no air blowing during the welding process, effectively ensures that the welding slag or dust will not enter the inside of the battery cell 30.

[0039] The above embodiments are only used to illustrate the technical solutions of the present application, but not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for detecting tab folding and tab smoothing, characterized in that, It includes a tab folding detection component (10) and a smoothing welding component (20). The tab folding detection component (10) and the smoothing welding component (20) are connected via a PLC. The tab folding detection component (10) is equipped with multiple sensors (13). The smoothing welding component (20) includes a smoothing guide mechanism (22) and a welding mechanism. The smoothing guide mechanism (22) and the welding mechanism are connected via a PLC.

2. The device for detecting tab folding and tab smoothing according to claim 1, characterized in that, The tab folding detection assembly (10) includes a machine base frame (11) and a sensor bracket (12). The sensor bracket (12) is connected to the machine base frame (11), and the sensor (13) is fixed on the sensor bracket (12).

3. The device for detecting tab folding and tab smoothing according to claim 2, characterized in that, The sensor bracket (12) has a first square groove (121) at its bottom, and the sensor bracket (12) is fixed to the machine base frame (11) through the first square groove (121).

4. The device for detecting tab folding and tab smoothing according to claim 1, characterized in that, The smoothing guide mechanism (22) is a wedge-shaped block, and the inclined surface of the wedge-shaped block is provided with multiple air holes with the same spacing.

5. The device for detecting tab folding and tab smoothing according to claim 4, characterized in that, The welding mechanism includes an ultrasonic welding base plate (21) and a welding head (23), the welding head (23) passing through the ultrasonic welding base plate (21) and being able to move up and down.

6. The device for detecting tab folding and tab smoothing according to claim 5, characterized in that, The smoothing guide mechanism (22) is connected to the fixing block (24), which has a second square groove (241) and is fixed to the bottom of the welding head (23) through the second square groove (241).

7. The device for detecting tab folding and tab smoothing according to claim 2, characterized in that, The number of sensor brackets (12) is the same as the number of sensors (13), and the sensors (13) are fixed on the top of the sensor brackets (12).

8. The device for detecting tab folding and tab smoothing according to claim 5, characterized in that, The smoothing guide mechanism (22) and the welding head (23) are arranged side by side, and the number of smoothing guide mechanisms (22) and welding mechanisms is the same.

9. The device for detecting tab folding and tab smoothing according to claim 4, characterized in that, The wedge block is connected to the air pipe, which is equipped with a PLC-controlled pressure regulating valve and a solenoid valve.

10. The device for detecting tab folding and tab smoothing according to claim 3, characterized in that, The bottom of the sensor bracket (12) is provided with a plurality of first square slots (121).

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