Device for detecting, adsorbing and fixing tabs in lithium battery lamination process

Abstract

The utility model relates to the technical field of lithium battery preparation, in particular to a lithium battery lamination process tab detection, adsorption and fixing device, which is combined with an original machine automatic component, is mounted on a lamination feeding mechanism and a lamination mechanism of a lamination machine, can be automatically and synchronously operated with the lamination feeding mechanism and the lamination mechanism, and is high in automation degree. In the lamination process, the tab inward folding and tab missing can be automatically detected, the tab can be fixed, the detection efficiency is high, and the use effect is obvious. A large amount of labor is saved, meanwhile, the risk that the tabs and the diaphragms are damaged possibly due to manual arrangement of the tabs is avoided, and the quality of the roll core is improved. In addition, the device is suitable for pole pieces with different tab specifications, and is high in universality, simple to install and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery preparation, in particular to a device for detecting, adsorbing and fixing a pole ear in a lithium battery lamination process. Background Art

[0002] At present, the lithium battery stacking core mainly adopts the Z-shaped stacking process to form a multi-layer stacking structure with "diaphragm-positive electrode-diaphragm-negative electrode" as the unit, and the positive and negative pole pieces that constitute the core have pole ears respectively, which requires the stacking machine to have the ability to identify, adsorb and fix the pole ears. The existing stacking machine uses a reflective photoelectric switch to detect the pole ears, which has high requirements for the state of the pole ears and requires high detection accuracy. The photoelectric switch cannot accurately detect whether it is far or near, and there are many alarms during the stacking process. In addition, the pole ears are not identified and fixed during the pole piece transfer and stacking process, which can easily cause the pole ears to be affected by external forces such as airflow, resulting in bending, fracture, etc., and may fold into the core during the stacking process, causing short circuit risks. In order to reduce this short circuit risk, after the stacking is completed, it is necessary to manually check the integrity of the pole ears and sort out the folded pole ears. However, manual sorting of the pole ears is likely to cause damage to the pole ears and the diaphragm, which not only increases the risk of short circuit in the core, but also reduces the qualified rate of the battery after packaging and affects the relevant performance of the battery. In addition, manual tab handling increases labor costs and is not conducive to actual production. For this reason, we propose a device for detecting, adsorbing and fixing tabs in the lithium battery stacking process, which greatly improves the above-mentioned problem. Utility Model Content

[0003] In view of the technical problems existing in the prior art, the utility model provides a device for detecting, adsorbing and fixing the pole ears in a lithium battery lamination process.

[0004] According to one aspect of the present invention, the present invention provides the following technical solutions:

[0005] A detection, adsorption and fixing device for the tabs of a lithium battery lamination process, comprising a tab adsorption and detection device for a sheet feeding mechanism and a tab fixing device for a lamination mechanism;

[0006] The tab adsorption and detection device of the film feeding mechanism comprises: a mounting plate, a vacuum suction cup rod, a vacuum suction cup, and a vacuum detection device; the vacuum suction cup is mounted on the vacuum suction cup rod, the vacuum suction cup rod is mounted on the mounting plate, and the other end of the vacuum suction cup rod is connected to the vacuum detection device; the mounting plate and the film feeding mechanism are mounted together by connecting screws; the vacuum detection device can detect the state of the tab through the change of vacuum;

[0007] The tab fixing device of the lamination mechanism comprises: a T-shaped plate, a pressure plate, a spring, and a T-shaped guide rod; the T-shaped guide rod passes through the T-shaped plate and the spring in sequence and is connected to the threaded hole of the pressure plate; the T-shaped plate and the lamination mechanism are installed together by connecting screws.

[0008] As a preferred solution of the device for detecting, adsorbing and fixing the pole lugs in the lithium battery stacking process described in the utility model, the pole lug adsorption and detection device of the feeding mechanism is composed of a vacuum suction cup, a vacuum suction cup rod and a horizontal mounting plate installed in an L shape, and the mounting plate is installed on the feeding mechanism by screws, and shares the lifting cylinder and the vacuum detection device with the feeding mechanism to realize the pole lug detection and adsorption functions; the mounting plate is provided with a waist hole connected to the feeding mechanism, and the suction cup position can be adjusted according to different pole pieces.

[0009] As a preferred solution of the detection, adsorption and fixing device of the pole ear in the lithium battery stacking process described in the utility model, the pole ear fixing device of the stacking mechanism is connected to the stacking mechanism through the waist hole of the T-shaped plate, the position of the pressure plate can be adjusted according to different pole ear positions, and the cylinder is shared with the stacking mechanism, and the structure is simple and reliable.

[0010] The beneficial effects of the utility model are as follows:

[0011] The utility model provides a detection, adsorption and fixing device for the pole ears in the lamination process of lithium batteries. Combined with the original machine automation components, the device described in the utility model is installed on the feeding mechanism and lamination mechanism of the lamination machine, and can automatically operate synchronously with the feeding mechanism and the lamination mechanism. In the lamination process, it can automatically detect the inward folding of the pole ears, the missing pole ears, and fix the pole ears. The detection efficiency is high and the use effect is obvious. A lot of labor is saved, and at the same time, the risk of damage to the pole ears and diaphragms caused by manual handling of the pole ears is avoided, and the quality of the winding core is improved. In addition, the utility model is suitable for pole sheets with different pole ear specifications, has strong versatility, is simple to install, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model installed on a laminating machine.

[0014] Figure 2 It is a structural schematic diagram of the tab adsorption and detection device of the sheet feeding mechanism of the utility model.

[0015] Figure 3 It is a structural schematic diagram of the tab fixing device of the lamination mechanism of the utility model.

[0016] Figure 4It is a schematic diagram of the tab adsorption and detection device of the sheet feeding mechanism of the utility model.

[0017] Figure 5 It is a schematic diagram of the tab fixing device of the lamination mechanism of the utility model.

[0018] Figure 6 It is a schematic diagram of the utility model before the tab of the sheet feeding mechanism is fixed.

[0019] Figure 7 It is a schematic diagram of the utility model after the tabs of the feeding mechanism are fixed.

[0020] Figure 8 It is a schematic diagram of the utility model before the tabs of the lamination mechanism are fixed.

[0021] Fig. 9 It is a schematic diagram of the utility model after the tabs of the lamination mechanism are fixed.

[0022] Wherein: 1. Tab adsorption and detection device of feeding mechanism, 101. Vacuum suction cup rod, 101-1. Nut, 101-2. Vacuum suction cup mounting end, 101-3. Vacuum detection device connection end, 102. Mounting plate, 102-2. Round hole, 103. Vacuum suction cup, 104. Vacuum detection device;

[0023] 2. Tab fixing device of lamination mechanism, 201, T-shaped plate, 201-1, waist hole, 201-2, guide hole, 202, pressing plate, 202-1, threaded hole, 203, T-shaped guide rod, 204, spring;

[0024] 3. Laminated pressing claw parts, 301, pressing claw front and rear cylinders, 302, pressing claw lifting cylinder;

[0025] 4. Sheet feeding mechanism, 5. Sheet stacking mechanism, 6. Shaping table, 8. Pole piece, 801, Pole ear.

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be described clearly and completely in conjunction with the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 1-9As shown, the detection, adsorption and fixing device for the tabs of the lithium battery lamination process described in the utility model comprises a tab adsorption and detection device 1 of a feeding mechanism and a tab fixing device 2 of a lamination mechanism; the tab adsorption and detection device 1 of the feeding mechanism comprises: a vacuum suction cup rod 101, a mounting plate 102, a vacuum suction cup 103, and a vacuum detection device 104; the vacuum suction cup rod 101 is mounted on the circular hole 102-2 of the mounting plate 102 through a nut 101-1, and the height can be adjusted through the nut 101-1 according to the tab position, and the vacuum suction cup mounting end 104 of the vacuum suction cup rod 101 1-2 installs the vacuum suction cup 103, and the vacuum detection device connecting end 101-3 is connected to the vacuum detection device 104; the waist hole 201-1 is connected to the sheet feeding mechanism 4; the stacking mechanism ear fixing device 2 includes a T-shaped plate 201, a pressure plate 202, a T-shaped guide rod 203, and a spring 204; the T-shaped guide rod 203 is movably connected to the T-shaped plate 201, and the T-shaped guide rod 203 passes through the guide hole 201-2 of the T-shaped plate 201, the spring 204 and the threaded hole 202-1 of the pressure plate 202 in turn, and the waist hole 201-1 of the T-shaped plate 201 is connected to the stacking claw component 3.

[0029] Specifically, through the above device, when the film feeding mechanism 4 takes the film from the shaping table 6, the vacuum detection device 104 will generate a vacuum to suck the electrode 8 through the vacuum suction cup 103, and the vacuum suction cup 103 will suck the pole ear to fix it, so as to ensure that the pole ear will not be bent due to airflow during the movement from the shaping table 6 to the stacking mechanism 5. At the same time, if the pole ear is bent or missing, the actual value of the adsorption vacuum will be too different from the set value, thereby triggering the equipment alarm. At this time, the defective pole piece can be manually removed to ensure that the pole piece with a defective pole ear is not stacked into the battery cell. The schematic diagram of the comparison before and after the fixation of the pole ear of the film feeding mechanism 4 is shown in the figure below. Figure 6 and Figure 7 As shown, Figure 6 It is a schematic diagram of the tab adsorption and detection device 1 without the film feeding mechanism installed. Figure 7 The electrode tab adsorption and detection device 1 of the feeding mechanism is installed, and the electrode tab state during the electrode tab transfer process or when the electrode tab is moved into place is shown. Figure 6 The tab 801 will sag due to the influence of gravity, and the stacking process may cause the tab 801 to bend, resulting in a short circuit between the tab 801 and the inside of the winding core. Figure 7 The pole ear 801 of the pole piece 8 is adsorbed by the adsorption device, so that the pole ear 801 is fixed on the vacuum suction cup 103 to ensure that it is not bent by the airflow during the feeding process.

[0030] In one embodiment of the utility model, the T-shaped plate 201, the spring 204, and the pressure plate 202 are sequentially inserted under the T-shaped guide rod 203, and the thread of the T-shaped guide rod 203 is locked on the pressure plate 202 to fix the pole ear 801. During the lamination process, the pole ear 801 will not be bent by the airflow.

[0031] Specifically, through the above device, the feeding mechanism 4 moves the pole piece 8 to the top of the laminating mechanism 5 and descends, and is in close contact with the laminating mechanism 5. At this time, the pole ear 801 is above the pressing plate 202. After the front and rear cylinders 301 of the pressing claw are retracted to the position, the pressing claw lifting cylinder 302 is retracted to press the pole ear 801 under the pressing plate 202. After the vacuum detection device 104 detects that there is no vacuum, the feeding mechanism 4 retreats to the top and returns to the top of the shaping table 6 to prepare for the next cycle action, while the laminating mechanism 5 moves back and forth between the positive and negative laminating stations to repeat the laminating action until a complete battery cell is stacked.

[0032] The front and rear schematic diagram of the tab fixing device installed on the lamination mechanism is as follows Figure 8 and Fig. 9 As shown, Figure 8 This is the effect of not installing the tab fixing device 2 of the lamination mechanism. At this time, the tab 801 is not fixed and will be bent due to the influence of the airflow during the reciprocating movement of the lamination mechanism 5. Fig. 9 The effect of installing the tab fixing device 2 of the lamination mechanism is shown. At this time, the tab 801 is pressed by the pressing plate 202, and will not be affected by factors such as airflow during the reciprocating movement of the lamination mechanism 5, so that the tab 801 is always kept flat, avoiding the tab 801 from being folded into the battery cell.

[0033] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A device for detecting, adsorbing and fixing the tabs in a lithium battery lamination process, characterized in that: It includes a tab adsorption and detection device of a sheet feeding mechanism and a tab fixing device of a sheet stacking mechanism; The tab adsorption and detection device of the sheet feeding mechanism comprises: a mounting plate, a vacuum suction cup rod, a vacuum suction cup, and a vacuum detection device; the vacuum suction cup is mounted on the vacuum suction cup rod, the vacuum suction cup rod is mounted on the mounting plate, and the other end of the vacuum suction cup rod is connected to the vacuum detection device; The tab fixing device of the lamination mechanism comprises: a T-shaped plate, a pressure plate, a spring, and a T-shaped guide rod; the T-shaped guide rod passes through the T-shaped plate and the spring in sequence and is connected with the threaded hole of the pressure plate.

2. The device for detecting, adsorbing and fixing the tabs in the lithium battery lamination process according to claim 1, characterized in that: The tab adsorption and detection device of the sheet feeding mechanism is composed of a vacuum suction cup, a vacuum suction cup rod and a horizontal mounting plate which are installed in an L shape.

3. The device for detecting, adsorbing and fixing the tabs in the lithium battery lamination process according to claim 1, characterized in that: The mounting plate and the film feeding mechanism are mounted together via connecting screws.

4. The device for detecting, adsorbing and fixing the tabs in the lithium battery lamination process according to claim 1, characterized in that: The mounting plate and the film feeding mechanism share the lifting cylinder and vacuum detection device to realize the tab detection and adsorption functions.

5. The device for detecting, adsorbing and fixing the tabs in the lithium battery lamination process according to claim 1, characterized in that: The mounting plate is provided with a waist hole connected to the film feeding mechanism, and the position of the suction cup can be adjusted according to different pole pieces.

6. The device for detecting, adsorbing and fixing the tabs in the lithium battery lamination process according to claim 1, characterized in that: The vacuum detection device can detect the state of the tab through changes in vacuum.

7. The device for detecting, adsorbing and fixing the tabs in the lithium battery lamination process according to claim 1, characterized in that: The lamination mechanism pole ear fixing device is connected with the lamination mechanism through the waist hole of the T-shaped plate.

8. The device for detecting, adsorbing and fixing the tabs in the lithium battery lamination process according to claim 1, characterized in that: The T-shaped plate and the lamination mechanism are mounted together via connecting screws.

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