A soft-pack battery cell short tab grinding device

Abstract

The present invention discloses a soft-pack battery cell short tab grinding device, belonging to the technical field of tab grinding. It includes a conveyor belt through which the tooling is transported; it also includes a rotating assembly and a positioning assembly respectively located on both sides of the conveyor belt, a grinding assembly on the same side as the rotating assembly, and induction assemblies are provided on both sides of the conveyor belt; the rotating assembly is used to drive the tooling to rotate, and the positioning assembly is used to position the tooling. This device can grind several tabs that are not on the same horizontal line, and at the same time can grind different planes of the tabs according to requirements.

Description

Technical Field

[0001] The present invention belongs to the technical field of tab grinding, and particularly relates to a tab grinding device for soft-pack battery cells with short tabs. Background Art

[0002] When welding wires or protective plates to the battery, it is found that the battery tabs are oxidized, resulting in false soldering or loose soldering of the battery. Therefore, it is necessary to grind the tabs.

[0003] The internal structure of lithium-ion batteries is mainly divided into 4 types according to their manufacturing methods: normal structure, tab-centered structure, multi-tab structure, and stacked structure. In the normal structure, there is only one tab for the positive and negative electrodes, and the tab is located at one end of the electrode plate and is made by winding. In the tab-centered structure, the tab is located in the middle of the electrode plate and is generally processed by laser cleaning, interval coating, taping, etc. The internal resistance of the battery is small, and the rate performance is good. In the multi-tab winding electrode plate, there are multiple tabs, and the tab positions vary according to the design. The battery resistance is smaller, and the rate performance of the battery is better. The stacked battery is made by cutting the electrode plate into a specific shape and folding the positive and negative electrodes alternately. Each layer has one tab, and the rate performance of this structure of the battery is the best. Therefore, not all the tabs of lithium-ion batteries are on the same horizontal line.

[0004] However, the existing technology can only be applied to grinding tabs on the same horizontal line. Summary of the Invention

[0005] In view of the above problems in the existing technology, the purpose of the present invention is to provide a tab grinding device for soft-pack battery cells with short tabs.

[0006] The present invention provides the following technical solutions:

[0007] A tab grinding device for soft-pack battery cells with short tabs, comprising a conveyor belt, and a tooling is transported by the conveyor belt; a rotating assembly and a positioning assembly are respectively located on both sides of the conveyor belt, a grinding assembly is located on the same side as the rotating assembly, and induction components are provided on both sides of the conveyor belt; the rotating assembly is used to drive the tooling to rotate, and the positioning assembly is used to position the tooling.

[0008] Specifically, the tooling includes a base, a gear one movably installed on the base, a mounting plate installed on the gear one, and a plurality of positioning blocks installed on the mounting plate. A positioning groove is formed by the plurality of positioning blocks, and the workpiece is placed in the positioning groove.

[0009] Specifically, the rotating assembly includes a chassis, a bottom plate movably installed on the chassis through a moving component three, and a gear two movably installed on the bottom plate through a motor.

[0010] Specifically, the positioning assembly includes a slide cylinder, a Y-shaped plate installed on the slide cylinder, and rollers symmetrically and movably installed on the Y-shaped plate.

[0011] Specifically, the pressing force F of the sliding table cylinder on the roller needs to meet two conditions:

[0012] A. The pressing force F needs to ensure that the force P on the outer diameter of the motor-driven gear two will not push away gear one, so F > P is required;

[0013] B. The pressing force F also needs to avoid being too large, so as to prevent gear two from rotating, so F needs to be less than the allowable load force Q of gear two.

[0014] Specifically, since P = T×(2 / D2), so F > T×(2 / D2); where T is the motor torque with a reduction ratio of i: T = T0×i, T0 is the rated torque of the motor (N·m), and D2 is the diameter of gear two (m).

[0015] Specifically, since Q = Q0 / L, so F < Q0 / L; where Q0 is the allowable overhanging load of the motor (N·mm), and L is the distance between the motor mounting surface and the meshing position of gear two (mm).

[0016] Specifically, the roller is a polyurethane roller.

[0017] Specifically, the induction component includes a bracket and an induction piece mounted on the bracket.

[0018] Specifically, the grinding component includes a first moving component, a first moving plate mounted on the first moving component, a second moving plate movably mounted on the first moving plate through a second moving component, a grinding machine mounted on the second moving plate, and a grinding block mounted on the grinding machine.

[0019] The beneficial effects of the present invention are:

[0020] This device can grind several tabs that are not on the same horizontal line, and at the same time can grind different planes of the tabs according to requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0022] Figure 1 is the three-dimensional view of the workpiece;

[0023] Figure 2 is the top view of the present invention;

[0024] Figure 3 is the three-dimensional view of the present invention without the grinding component;

[0025] Figure 4 is the top view of the grinding component of the present invention;

[0026] In the figure, the markings are: 1, conveyor belt; 2, tooling; 3, induction component; 4, positioning component; 5, grinding component; 6, rotating component; 7, brushing and rotating device; 8, drying device;

[0027] 201, base; 202, gear one; 203, mounting plate; 204, positioning block; 205, positioning groove;

[0028] 301, bracket; 302, induction part;

[0029] 401, slide cylinder; 402, Y-shaped plate; 403, roller;

[0030] 501, grinding machine; 502, grinding block; 503, moving plate two; 504, moving plate one; 505, moving component two;

[0031] 601, gear two; 602, moving component three; 603, chassis. Detailed implementation mode

[0032] The internal structure of lithium-ion batteries is mainly divided into 4 types according to their manufacturing methods: normal structure, middle-positioned tab structure, multi-tab structure, and laminated structure. In the normal structure, there is only one tab for the positive and negative electrodes, and the tab is located at one end of the electrode plate and is made by winding; in the middle-positioned tab structure, the tab is located in the middle of the electrode plate and is generally processed by methods such as laser cleaning, interval coating, and taping. The internal resistance of the battery is smaller and the rate performance is better; in the multi-tab winding electrode plate, there are multiple tabs, and the tab positions vary according to the design. The battery resistance is smaller and the rate performance of the battery is better; the laminated battery is made by cutting the electrode plate into a specific shape and folding the positive and negative electrodes alternately, and there is one tab in each layer. The battery with this structure has the best rate performance. Therefore, not all tabs of lithium-ion batteries are on the same horizontal line.

[0033] As Figure 1 shown, the tabs shown in the figure are not on the same horizontal line and there is a certain height difference. The design of this device can grind the tabs in the above situation; at the same time, due to different connection conditions, the surfaces to be ground are also different, so a rotating component is designed to rotate the workpiece to facilitate grinding the planes in different directions of the tabs.

[0034] As Figure 2 shown, the present invention provides a soft-pack battery short-tab grinding device, including a conveyor belt 1, the tooling 2 is transported by the conveyor belt 1, a rotating component 6 and a positioning component 4 located on both sides of the conveyor belt 1 respectively, a grinding component 5 located on the same side as the rotating component 6, and induction components 3 are provided on both sides of the conveyor belt 1.

[0035] When the tooling 2 is transported by the conveyor belt 1 to the position of the induction component 3, the induction component 3 transmits a signal to activate the rotation component 6. The rotation component 6 drives the tooling 2 to rotate to a suitable position for grinding. Subsequently, the positioning component 4 is activated, and the positioning component 4 fixes the position of the tooling 2. Then, the grinding component 5 is activated, and the ear tabs are ground by the grinding component 5.

[0036] Please refer to Figure 3 , the tooling 2 includes a base 201, a first gear 202 movably installed on the base 201, a mounting plate 203 installed on the first gear 202, and a plurality of positioning blocks 204 installed on the mounting plate 203. A positioning groove 205 is formed by the plurality of positioning blocks 204, and the workpiece is placed in the positioning groove 205.

[0037] The rotation component 6 includes a chassis 603, a bottom plate movably installed on the chassis 603 through a third moving component 602, and a second gear 601 movably installed on the bottom plate through a motor.

[0038] The positioning component 4 includes a slide table cylinder 401, a Y-shaped plate 402 installed on the slide table cylinder 401, and rollers 403 symmetrically and movably installed on the Y-shaped plate 402.

[0039] The induction component 3 includes a bracket 301 and an inductor 302 installed on the bracket 301; the inductor 302 is a proximity switch, an optoelectronic sensor, etc.

[0040] When the tooling 2 moves to the specified position, the inductor 302 senses the tooling 2 and transmits a signal. Subsequently, the third moving component 602 is activated, and the third moving component 602 pushes the second gear 601. At the same time, the slide table cylinder 401 is activated, and the rollers 403 push the first gear 202 to press tightly against the second gear 601. The second gear 601 meshes with the first gear 202. Then, the motor is activated, thereby driving the first gear 202 to rotate, and further driving the workpiece to rotate to the specified direction.

[0041] Furthermore, in order to avoid the rollers 403 affecting the meshing state of the first gear 202, the rollers 403 are polyurethane rollers.

[0042] The pressing force F of the slide table cylinder 401 on the rollers 403 needs to meet two conditions:

[0043] A. The pressing force F needs to ensure that the force P driving the outer diameter of the second gear 601 by the motor does not push away the first gear 202. Therefore, F > P;

[0044] Since P = T×(2 / D2), therefore F > T×(2 / D2); where T is the torque of the motor with a reduction ratio of i: T = T0×i, T0 is the rated torque of the motor (N·m), and D2 is the diameter of the second gear 601 (m).

[0045] B. The pressing force F also needs to be avoided from being too large, so as to prevent the second gear 601 from rotating. Therefore, it is necessary that F is less than the allowable load force Q of the second gear 601.

[0046] Since Q = Q0 / L, so F < Q0 / L; where Q0 is the allowable overhanging load of the motor (N·mm), and L is the distance (mm) between the motor mounting surface and the meshing position of the second gear 601. Thus, by selecting the slide table cylinder 401 whose cylinder thrust belongs to the range within the range of the pressing force F, the cylinder thrust applied by it can meet the above conditions.

[0047] Please refer to Figure 4 , the grinding assembly 5 includes a first moving assembly, a moving plate 504 mounted on the first moving assembly, a moving plate 503 movably mounted on the moving plate 504 through a second moving assembly 505, a grinding machine 501 mounted on the moving plate 503, and a grinding block 502 mounted on the grinding machine 501.

[0048] Among them, the first moving assembly drives the grinding machine 501 to move vertically, and the second moving assembly 505 drives the second moving assembly 505 to move horizontally.

[0049] When the position of the workpiece is fixed, turn on the first moving assembly, the second moving assembly 505 and the grinding machine 501, and the grinding block 502 approaches the tab and grinds the tab.

[0050] Specifically, the first moving assembly, the second moving assembly 505 and the third moving assembly 602 are all electric linear guides, single-axis robots or electric lead screws, etc.

[0051] The conveyor belt 1, the first moving assembly, the second moving assembly 505, the third moving assembly 602, the slide table cylinder 401, the sensing member 302, the slide table cylinder 401 and the grinding machine 501 are communicatively coupled to the control panel.

[0052] Based on the above device, the present invention also proposes an operation method for using the above-mentioned soft-pack battery short tab grinding device, including the following steps:

[0053] Step 1, the conveyor belt 1 transports the tooling 2, and after reaching the designated position, the sensing assembly 3 senses the position of the tooling 2 and transmits a signal;

[0054] Step 2, turn on the third moving assembly 602, the third moving assembly 602 pushes the second gear 601, and at the same time turn on the slide table cylinder 401, the roller 403 pushes the first gear 202 to press against the second gear 601, and the second gear 601 meshes with the first gear 202;

[0055] Step 3, turn on the motor, which drives the first gear 202 to rotate, and then drives the workpiece to rotate to the designated direction and stop;

[0056] Step 4: Turn on Moving Component 1, Moving Component 2 505 and the grinding machine 501. The grinding block 502 approaches the tab and grinds the tab.

[0057] This device can grind several tabs that are not on the same horizontal line, and at the same time, can grind different planes of the tabs according to requirements.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A soft-pack battery cell short tab grinding device, including a conveyor belt, and the tooling is transported by the conveyor belt; It is characterized in that It further includes a rotating component and a positioning component respectively located on both sides of the conveyor belt, a grinding component located on the same side as the rotating component, and induction components are provided on both sides of the conveyor belt; the rotating component is used to drive the tooling to rotate, and the positioning component is used to position the tooling; The tooling includes a base, a first gear movably installed on the base, a mounting plate installed on the first gear, and a plurality of positioning blocks are installed on the mounting plate. A positioning groove is formed by the plurality of positioning blocks, and the workpiece is placed in the positioning groove; The rotating component includes a chassis, a bottom plate movably installed on the chassis through a third moving component, and a second gear movably installed on the bottom plate through a motor; The positioning component includes a slide cylinder, a Y-shaped plate installed on the slide cylinder, and rollers are symmetrically and movably installed on the Y-shaped plate; The pressing force F of the slide cylinder on the rollers needs to meet two conditions: A. The pressing force F needs to ensure that the force P driving the outer diameter of the second gear by the motor will not push away the first gear, so F > P is required; B. The pressing force F also needs to be avoided from being too large, so that the second gear cannot rotate, so F needs to be less than the allowable load force Q of the second gear.

2. The soft-pack battery cell short tab grinding device according to claim 1, characterized in that Since P = T×(2 / D2), so F > T×(2 / D2); where T is the torque of the motor with a reduction ratio of i: T = T0×i, T0 is the rated torque of the motor (N·m), and D2 is the diameter of the second gear (m).

3. A soft-pack battery cell short tab grinding device according to claim 1 or 2, characterized in that, Since Q = Q0 / L, so F < Q0 / L; where Q0 is the allowable overhanging load of the motor (N·mm), and L is the distance between the motor mounting surface and the meshing position of the second gear (mm).

4. A soft-pack battery cell short tab grinding device according to claim 1, characterized in that, The rollers are polyurethane rollers.

5. A soft-pack battery cell short tab grinding device according to claim 1, characterized in that, The induction component includes a bracket and an induction piece installed on the bracket.

6. The soft-pack battery cell short tab grinding device according to claim 1, characterized in that The grinding component includes a first moving component, a first moving plate installed on the first moving component, a second moving plate movably installed on the first moving plate through a second moving component, a grinding machine installed on the second moving plate, and a grinding block installed on the grinding machine.

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