Positioning and fixing device before gasket placement and pole lug positioning and fixing method before gasket placement

Abstract

The invention provides a positioning and fixing device before gasket placement and a tab positioning and fixing method before gasket placement. The positioning and fixing device before gasket placement comprises a bottom plate, a rotating disc, a top plate, a first rotating driving piece, a plurality of die sleeves, a tab positioning mechanism and a battery cell protection mechanism, the battery cell protection mechanism comprises a first lifting driving piece and an ejector rod, and the tab positioning mechanism comprises a rotating assembly and a positioning detection assembly. Specifically, a first lifting driving piece drives an ejector rod to move upwards, so that the end part of the ejector rod penetrates through a receding hole to abut against the bottom of the battery cell, the battery cell is driven to move downwards together in a die sleeve, and the acting force generated when the battery cell is in contact with the bottom wall of a containing groove is reduced; the rotating assembly drives the die sleeve to rotate, and when the tab on the battery cell rotates to be opposite to the positioning detection piece, the positioning detection piece releases a signal to enable the rotating assembly to stop rotating, so that positioning of the tab is completed, and the problem of tab bending caused by contact between the gasket and the tab is avoided.

Description

Technical Field

[0001] The present disclosure relates to the field of battery assembly, and in particular to a positioning and fixing device before placing a gasket and a method for positioning and fixing a tab before placing a gasket. Background Art

[0002] During the battery production process, the battery gasket needs to be inserted into the battery to provide electrical isolation inside the battery and protect the battery from mechanical damage. In the current production equipment, the robot first puts the battery cell into the mold sleeve, and the turntable drives the mold sleeve to rotate. When the mold sleeve rotates to the predetermined position, the insertion mechanism inserts the gasket into the battery cell from top to bottom, and allows the tab to pass through the avoidance hole of the gasket.

[0003] However, since the battery cell is grabbed by the robot and then placed in the mold sleeve, and the height of the mold sleeve is relatively large, the battery cell is subjected to free fall motion due to gravity after falling into the mold sleeve, which makes the battery cell have a relatively high speed when it abuts against the bottom wall of the mold sleeve, resulting in a large force when the diaphragm of the battery cell contacts the bottom wall of the mold sleeve, which in turn causes the battery cell diaphragm to be damaged, affecting the battery performance; on the other hand, due to the deviation in the rotation position of the battery, when the insertion mechanism inserts the gasket into the battery, the ear hole of the gasket is not aligned with the ear, which makes it easy for the gasket to touch the ear during insertion, which in turn causes the ear to bend or the gasket cannot be accurately inserted into the battery, that is, the rotation positioning of the battery is not accurate enough.

[0004] Therefore, there is an urgent need for a battery assembly device that can prevent damage to the battery cell diaphragm and has high positioning accuracy when inserting the gasket. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a device for positioning and fixing a tab before placing a gasket, which can prevent damage to a cell diaphragm and achieve high positioning accuracy when inserting a gasket.

[0006] The purpose of this disclosure is achieved through the following technical solutions:

[0007] A positioning and fixing device before placing a gasket, comprising:

[0008] A bottom plate, a rotating disk, a top plate, a first rotating driving member and a plurality of mold sleeves, wherein the first rotating driving member is mounted on the bottom plate, a power output end of the first rotating driving member is connected to the rotating disk, the top plate is connected to the bottom plate via a connecting column, the top plate is slidably connected to the rotating disk, the rotating disk is provided with a plurality of embedding grooves arranged at intervals, the mold sleeves are located in the corresponding embedding grooves, the mold sleeves are provided with accommodating grooves, and the accommodating grooves are used to accommodate battery cells,

[0009] The positioning and fixing device before placing the gasket also includes a tab positioning mechanism and a battery cell protection mechanism, the battery cell protection mechanism includes a first lifting drive member and a push rod, the first lifting drive member is installed on the bottom plate, the push rod is connected to the power output end of the first lifting drive member, the mold sleeve is provided with an avoidance hole connected to the accommodating groove, and the push rod is movably inserted into the avoidance hole;

[0010] The tab positioning mechanism includes a rotating assembly and a positioning detection assembly, wherein the rotating assembly is mounted on the bottom plate, and is used to drive the mold sleeve to rotate when it abuts against the mold sleeve, and the positioning detection assembly includes a mounting frame, a second lifting drive member, a bracket and a positioning detection member, wherein the mounting frame is mounted on the top plate, the second lifting drive member is connected to the mounting frame, the power output end of the second lifting drive member is connected to the bracket, the positioning detection member is connected to the bracket, and the positioning detection member is used to detect the rotation position of the tab of the battery cell, so that the rotating assembly stops rotating when the tab of the battery cell rotates to a predetermined position.

[0011] In one embodiment, a conical supporting portion is provided at one end of the ejector rod adjacent to the mold sleeve.

[0012] In one of the embodiments, a surface of the conical top holding portion is provided with an electroplating layer.

[0013] In one embodiment, there are two positioning detection members, which are spaced apart on the bracket. When the rotating assembly is used to rotate the tab of the battery cell to between the two positioning detection members, the rotating assembly stops rotating.

[0014] In one embodiment, the rotating assembly includes a fixed seat, a horizontal driving member, a second rotating driving member, a connecting plate and a rotating table, the fixed seat is installed on the base plate, the horizontal driving member is connected to the fixed seat, the power output end of the horizontal driving member is connected to the connecting plate, the second rotating driving member is installed on the connecting plate, the rotating table is connected to the power rotating end of the second rotating driving member, and the rotating table is in sliding contact with the mold sleeve.

[0015] In one of the embodiments, the outer periphery of the rotating table is covered with a silicone sleeve.

[0016] In one of the embodiments, the fixing seat is provided with a guide rail, the connecting plate is provided with a sliding groove, and the guide rail is embedded in the sliding groove so that the connecting plate slides along the extending direction of the guide rail.

[0017] In one embodiment, the mold sleeve includes a sleeve cup and a fixed plate, the fixed plate is connected to the rotating disk, the fixed plate is provided with a sleeve hole, one end of the sleeve cup away from the bottom plate is sleeved in the sleeve hole, and the accommodating groove and the avoidance hole are both provided in the sleeve cup.

[0018] In one embodiment, the mold sleeve also includes a screw connection member, the fixed plate is provided with a first screw connection hole, the rotating disk is provided with a second screw connection hole, and the screw connection member passes through the first screw connection hole and the second screw connection hole in sequence to screw the fixed plate and the rotating disk.

[0019] A method for positioning and fixing a tab before placing a gasket, using the positioning and fixing device before placing a gasket described in any of the above embodiments for positioning, the method for positioning and fixing a tab before placing a gasket comprises the following steps:

[0020] The battery cell is placed into the mold sleeve by a manipulator, and the first lifting drive member is started to lift the ejector rod and hold the bottom of the battery cell;

[0021] Start the first lifting drive member to lower the ejector pin and make the battery core contact with the bottom wall of the mold sleeve;

[0022] Starting the first rotary drive member to rotate the rotary disk to the tab positioning mechanism;

[0023] Starting the rotating assembly to make the rotating assembly abut against the outer wall of the mold sleeve;

[0024] The second lifting drive member is started to lower the positioning detection member, and the rotating assembly is started to drive the mold sleeve to rotate. When the tab of the battery cell rotates to the positioning detection member, the positioning detection member releases a signal to stop the rotating assembly from rotating.

[0025] The second lifting driving member is started to reset the positioning detection member, and the first rotating driving member is started to rotate the rotating disk into the next station.

[0026] Compared with the prior art, the present invention has at least the following advantages:

[0027] 1. With the above-mentioned positioning and fixing device before placing the gasket, when the battery cell is placed into the receiving groove of the mold sleeve by the manipulator, the first lifting and driving member drives the push rod to move upward so that the end of the push rod passes through the avoidance hole and abuts against the bottom of the battery cell. At this time, the first lifting and driving member drives the push rod to move downward to drive the battery cell to move downward together in the mold sleeve until the battery cell abuts against the bottom wall of the receiving groove, thereby reducing the force when the battery cell contacts the bottom wall of the receiving groove, thereby avoiding the problem of damage to the diaphragm of the battery cell due to excessive force.

[0028] 2. The above-mentioned positioning and fixing device before placing the gasket, after the battery cell is fixed in the mold sleeve, the first rotating drive member drives the rotating disk to rotate to the pole ear positioning mechanism. At this time, the second lifting drive member drives the positioning detection member to descend to a predetermined position, and the rotating assembly is started to abut against the mold sleeve and rotate the mold sleeve, thereby driving the battery cell in the mold sleeve to rotate together. When the pole ear on the battery cell rotates to be opposite to the positioning detection member, the positioning detection member releases a signal to stop the rotating assembly from rotating, thereby completing the positioning of the pole ear, and the rotating disk continues to rotate to rotate the battery cell to the gasket placement station, so that the pole ear hole of the gasket can accurately pass through the pole ear during the insertion process of the gasket, thereby avoiding the problem of pole ear bending caused by contact between the gasket and the pole ear. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a structural schematic diagram of a positioning and fixing device before placing a gasket according to an embodiment;

[0031] Figure 2 for Figure 1 Another structural schematic diagram of the positioning and fixing device before placing the gasket shown;

[0032] Figure 3 for Figure 1 Another structural schematic diagram of the positioning and fixing device before placing the gasket is shown;

[0033] Figure 4 for Figure 1 The structural schematic diagram of the positioning detection assembly of the positioning and fixing device before placing the gasket is shown;

[0034] Figure 5 for Figure 1 The structural schematic diagram of the rotating assembly of the positioning and fixing device before placing the gasket is shown;

[0035] Figure 6 To adopt Figure 1 The process step diagram of the method for positioning and fixing the tab of the positioning and fixing device before placing the gasket is shown;

[0036] Figure 7 is a schematic cross-sectional view of a mandrel of an embodiment;

[0037] Figure 8 is a schematic cross-sectional view of an elastic buffer layer according to an embodiment;

[0038] Fig. 9 is a cross-sectional schematic diagram of a rotating truncated table according to an embodiment;

[0039] Fig.10 for Figure 1 The picture shown is a physical picture of the positioning fixture before placing the gasket. DETAILED DESCRIPTION

[0040] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0041] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0043] The present invention provides a positioning and fixing device before placing a gasket, comprising a bottom plate, a rotating disk, a top plate, a first rotating drive member, a plurality of mold sleeves, a pole ear positioning mechanism and a battery cell protection mechanism, wherein the first rotating drive member is installed on the bottom plate, the power output end of the first rotating drive member is connected to the rotating disk, the top plate is connected to the bottom plate through a connecting column, the top plate is slidably connected to the rotating disk, the rotating disk is provided with a plurality of embedding grooves arranged at intervals, the mold sleeve is located in the corresponding embedding grooves, the mold sleeve is provided with a receiving groove, and the receiving groove is used to receive the battery cell; the positioning and fixing device before placing a gasket also includes a pole ear positioning mechanism and a battery cell protection mechanism, and the battery cell protection mechanism includes a first lifting drive member and a push rod, the first lifting drive member is installed on the bottom plate, the push rod is connected to the first lifting drive member The power output end of the driving member is connected, the mold sleeve is provided with an avoidance hole connected to the accommodating groove, and the push rod is movably inserted into the avoidance hole; the pole ear positioning mechanism includes a rotating assembly and a positioning detection assembly, the rotating assembly is installed on the bottom plate, and the rotating assembly is used to drive the mold sleeve to rotate when it abuts against the mold sleeve, and the positioning detection assembly includes a mounting frame, a second lifting driving member, a bracket and a positioning detection member, the mounting frame is installed on the top plate, the second lifting driving member is connected to the mounting frame, the power output end of the second lifting driving member is connected to the bracket, the positioning detection member is connected to the bracket, and the positioning detection member is used to detect the rotation position of the pole ear of the battery cell, so that the rotating assembly stops rotating when the pole ear of the battery cell rotates to a predetermined position.

[0044] The above-mentioned positioning and fixing device before placing the gasket, when the battery cell is placed in the receiving groove of the mold sleeve by the manipulator, the first lifting and driving member drives the push rod to move upward so that the end of the push rod passes through the avoidance hole and abuts against the bottom of the battery cell. At this time, the first lifting and driving member drives the push rod to move downward, so as to drive the battery cell to move downward together in the mold sleeve until the battery cell abuts against the bottom wall of the receiving groove, thereby reducing the force when the battery cell contacts the bottom wall of the receiving groove, thereby avoiding the problem of damage to the diaphragm of the battery cell due to excessive force; after the battery cell is fixed in the mold sleeve, the first rotating driving member drives the rotating disk to rotate to The pole ear positioning mechanism, at this time, the second lifting drive member drives the positioning detection member to descend to a predetermined position, and the rotating assembly is started to abut against the mold sleeve and rotate the mold sleeve, thereby driving the battery cell in the mold sleeve to rotate together. When the pole ear on the battery cell rotates to be relative to the positioning detection member, the positioning detection member releases a signal to stop the rotating assembly from rotating, thereby completing the positioning of the pole ear, and the rotating disk continues to rotate to rotate the battery cell to the gasket placement position, so that the pole ear hole of the gasket can accurately pass through the pole ear during the insertion process, avoiding the problem of pole ear bending caused by contact between the gasket and the pole ear.

[0045] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0046] like Figures 1 to 4 As shown, a front positioning and fixing device 10 for placing a gasket in one embodiment includes a base plate 100, a rotating disk 200, a top plate 300, a first rotating driving member 400, a plurality of mold sleeves 500, a pole ear positioning mechanism 600 and a battery cell protection mechanism 700, wherein the first rotating driving member 400 is installed on the base plate 100, and the power output end of the first rotating driving member 400 is connected to the rotating disk 200, the top plate 300 is connected to the base plate 100 through a connecting column, the top plate 300 is slidably connected to the rotating disk 200, the rotating disk 200 is provided with a plurality of embedding grooves arranged at intervals, the mold sleeve 500 is located in the corresponding embedding grooves, and the mold sleeve 500 is provided with a accommodating groove 500a, and the accommodating groove 500a is used to accommodate the battery cell, so that the rotating disk 200 drives the mold sleeve 500 to rotate together.

[0047] Furthermore, the pre-gasket positioning and fixing device 10 also includes a pole ear positioning mechanism 600 and a battery cell protection mechanism 700, and the battery cell protection mechanism 700 includes a first lifting drive member (not shown) and a push rod 710, the first lifting drive member is installed on the base plate 100, and the push rod 710 is connected to the power output end of the first lifting drive member. Specifically, the first lifting drive member is installed on the bottom side of the base plate, and the output shaft of the first lifting drive member passes through the through hole of the base plate and is connected to the push rod 710, and the mold sleeve 500 is provided with an avoidance hole connected to the accommodating groove 500a, and the push rod 710 is movably penetrated in the avoidance hole, and the first lifting drive member is used to drive the push rod 710 to pass through the avoidance hole and then abut against the battery cell, so that the push rod 710 drives the battery cell to descend and abut against the bottom wall of the embedding groove.

[0048] Furthermore, the tab positioning mechanism 600 includes a rotating assembly 610 and a positioning detection assembly 620, wherein the rotating assembly 610 is mounted on the bottom plate 100, and the rotating assembly 610 is used to drive the mold sleeve 500 to rotate when it abuts against the mold sleeve 500, and the positioning detection assembly 620 includes a mounting frame 621, a second lifting drive member 622, a bracket 623 and a positioning detection member 624, wherein the mounting frame 621 is mounted on the top plate 300, the second lifting drive member 622 is connected to the mounting frame 621, the power output end of the second lifting drive member 622 is connected to the bracket 623, the positioning detection member 624 is connected to the bracket 623, and the positioning detection member 624 is used to detect the rotation position of the tab 10a of the battery cell, so that when the tab of the battery cell rotates to a predetermined position, the rotating assembly stops rotating and the rotating assembly 610 stops rotating.

[0049] In this embodiment, a plurality of mold sleeves 500 are arranged on the rotating disk 200, and each mold sleeve 500 is correspondingly located in the embedding groove, so that the device can continuously fix and position the battery cells in each mold sleeve 500. Specifically, when the battery cell is placed into the receiving groove 500a by the manipulator, due to the large depth of the mold sleeve 500, the force acting on the battery cell directly falling into the bottom wall of the receiving groove 500a is large, which can easily damage the diaphragm of the battery cell. At this time, the first lifting drive member drives the top rod 710 to rise, so that the top rod 710 abuts against the bottom of the battery cell, and then the first lifting drive member drives the top rod 710 to descend, so that the top rod 710 drives the battery cell to descend, thereby reducing the force acting on the battery cell when it abuts against the groove wall of the receiving groove 500a. Further, after the battery cell is fixed, the rotating disk 200 rotates to rotate the battery cell to the tab positioning mechanism 600. At this time, the second lifting drive 622 drives the positioning detection member 624 to descend to position the tab 10a on the battery cell. The rotating assembly 610 is started to abut against the outer wall of the mold sleeve 500. The rotating assembly 610 drives the mold sleeve 500 to rotate to drive the tab 10a on the battery cell to rotate together. When the tab 10a rotates to a position relative to the positioning detection member 624, it indicates that the tab 10a is at a predetermined position. The positioning detection member 624 releases a signal to stop the rotating assembly 610 from rotating and stop the rotating assembly 610 from abutting against the outer wall of the mold sleeve 500. The second lifting drive 622 drives the positioning detection member 624 to reset, and the rotating disk 200 rotates to rotate the battery cell to the gasket placement station. In this embodiment, the positioning detection member 624 is a sensor.

[0050] The above-mentioned pre-gasket positioning and fixing device 10, when the battery cell is placed in the receiving groove 500a of the mold sleeve 500 by the manipulator, the first lifting and lowering driving member drives the top rod 710 to move upward so that the end of the top rod 710 passes through the avoidance hole and abuts against the bottom of the battery cell. At this time, the first lifting and lowering driving member drives the top rod 710 to move downward, so as to drive the battery cell to move downward together in the mold sleeve 500 until the battery cell abuts against the bottom wall of the receiving groove 500a, thereby reducing the force when the battery cell contacts the bottom wall of the receiving groove 500a, thereby avoiding the problem of damage to the diaphragm of the battery cell due to excessive force; after the battery cell is fixed in the mold sleeve 500, the first rotating driving member 400 drives the rotating disk 200 to rotate to the pole ear positioning mechanism 6 00, at this time, the second lifting drive member 622 drives the positioning detection member 624 to descend to a predetermined position, and the rotating assembly 610 is started to abut against the mold sleeve 500 and rotate the mold sleeve 500, thereby driving the battery cell in the mold sleeve 500 to rotate together, and when the pole ear 10a on the battery cell rotates to be opposite to the positioning detection member 624, the positioning detection member 624 releases a signal to stop the rotating assembly 610 from rotating, thereby completing the positioning of the pole ear 10a, and the rotating disk 200 continues to rotate to rotate the battery cell to the gasket placement position, so that the pole ear 10a hole of the gasket can accurately pass through the pole ear 10a during the insertion process of the gasket, thereby avoiding the bending problem of the pole ear 10a caused by the contact between the gasket and the pole ear 10a.

[0051] like Figure 3 As shown, in one embodiment, a conical support portion 711 is provided at one end of the push rod 710 adjacent to the mold sleeve 500. It can be understood that when the push rod 710 abuts against the battery cell, there is a situation where the end of the push rod 710 contacts the pole lug 10a, and the push rod 710 is likely to fold the pole lug 10a. By providing a conical support portion 711 at the end of the push rod 710, when the pole lug 10a abuts against the conical support portion 711, the pole lug 10a can slide along the inclined surface of the conical support portion 711, thereby preventing the push rod 710 from folding the pole lug 10a.

[0052] In one embodiment, the surface of the conical top holding portion 711 is provided with an electroplating layer. It can be understood that the surface of the conical top holding portion 711 is provided with an electroplating layer, so that the surface of the conical top holding portion 711 is smoother, thereby enabling the tab 10a to slide along the inclined surface of the conical top holding portion 711 better.

[0053] like Figure 2 and Figure 4As shown, in one embodiment, the number of the positioning detection members 624 is two, and the two positioning detection members 624 are arranged at intervals on the bracket 623. When the rotating assembly 610 is used to rotate the tab 10a of the battery cell to between the two positioning detection members 624, the rotating assembly 610 stops rotating. In this embodiment, the two positioning detection members 624 are arranged at intervals on the bracket 623, and the path of the tab 10a rotating passes through the gap between the two positioning detection members 624. When the tab 10a rotates to between the two positioning detection members 624, it indicates that the tab 10a is at a predetermined position at this time, and the positioning detection member 624 releases a signal to stop the rotating assembly 610.

[0054] like Figure 5 As shown, in one embodiment, the rotating assembly 610 includes a fixed seat 611, a horizontal driving member 612, a second rotating driving member 613, a connecting plate 614 and a rotating table 615, the fixed seat 611 is installed on the base plate 100, the horizontal driving member 612 is connected to the fixed seat 611, the power output end of the horizontal driving member 612 is connected to the connecting plate 614, the second rotating driving member 613 is installed on the connecting plate 614, the rotating table 615 is connected to the power rotation end of the second rotating driving member 613, and the rotating table 615 is in sliding contact with the mold sleeve 500. It can be understood that the horizontal driving member 612 drives the connecting plate 614 to move in the horizontal direction so that the rotating table 615 is close to or away from the outer wall of the mold sleeve 500. When the horizontal driving member 612 drives the rotating table 615 to abut against the outer wall of the mold sleeve 500, the second rotating driving member 613 drives the rotating table 615 to rotate, thereby driving the battery cells in the mold sleeve 500 to rotate together to rotate the pole ear 10a to a predetermined position. When the pole ear 10a is positioned, the second rotating driving member 613 stops working, the horizontal driving member 612 drives the rotating table 615 away from the outer wall of the mold sleeve 500, and the rotating disk 200 rotates to rotate the battery cells to the next workstation.

[0055] In one embodiment, a silicone sleeve is provided on the outer periphery of the rotating truncated table 615. It can be understood that the rotating truncated table 615 abuts against the outer wall of the mold sleeve 500 so that the rotating truncated table 615 drives the mold sleeve 500 to rotate. By providing the silicone sleeve on the outer periphery of the rotating truncated table 615, the friction between the rotating truncated table 615 and the mold sleeve 500 is increased, thereby better driving the mold sleeve 500 to rotate.

[0056] like Figure 5As shown, in one embodiment, the fixed seat 611 is provided with a guide rail 611a, the connecting plate 614 is provided with a sliding groove, and the guide rail 611a is embedded in the sliding groove, so that the connecting plate 614 slides along the extension direction of the guide rail 611a. It can be understood that the fixed seat 611 is provided with a guide rail 611a, and the guide rail 611a is embedded in the sliding groove, so that the connecting plate 614 slides along the extension direction of the guide rail 611a, thereby driving the rotating round table 615 to approach or move away from the outer wall of the mold sleeve 500.

[0057] like Figure 2 and Figure 5 As shown, in one embodiment, the mold sleeve 500 includes a sleeve cup 510 and a fixed plate 520, the fixed plate 520 is connected to the rotating disk 200, the fixed plate 520 is provided with a sleeve hole, the end of the sleeve cup 510 away from the bottom plate 100 is sleeved in the sleeve hole, and the accommodating groove 500a and the avoidance hole are both provided in the sleeve cup 510. It can be understood that the fixed plate 520 is connected to the rotating disk 200, the top of the sleeve cup 510 is sleeved in the sleeve hole, so that the sleeve cup 510 can rotate relative to the fixed plate 520, the battery cell is located in the accommodating groove 500a of the sleeve cup 510, and the top rod 710 passes through the avoidance hole of the sleeve cup 510 and abuts against the battery cell.

[0058] like Figure 2 and Figure 5 As shown, in one embodiment, the mold sleeve 500 further includes a screw connection member, the fixed plate 520 is provided with a first screw connection hole 521, and the rotating disk 200 is provided with a second screw connection hole, and the screw connection member sequentially passes through the first screw connection hole 521 and the second screw connection hole to screw the fixed plate 520 with the rotating disk 200. In this embodiment, the screw connection member is a screw, and the fixed plate 520 and the rotating disk 200 are screwed and fixed by the screw. In another embodiment, the fixed plate 520 can also be snap-fitted with the rotating disk 200, that is, the fixed plate 520 is provided with a snap-fitting hole, and a snap-fitting column is convexly provided on the rotating disk 200, and the fixed plate 520 is snap-fitted with the rotating disk 200 by snapping the snap-fitting column into the snap-fitting hole.

[0059] like Figure 6 As shown, the present application also provides a method for positioning and fixing a tab before placing a gasket, which uses the positioning and fixing device before placing a gasket described in any of the above embodiments for positioning. The method for positioning and fixing a tab before placing a gasket includes the following steps:

[0060] S100: placing the battery cell into the mold sleeve by means of a robot, and starting the first lifting drive member to lift and support the bottom of the battery cell with the ejector rod.

[0061] In this embodiment, the manipulator grabs the battery cell from the previous station and places it into the mold sleeve. Due to the large depth of the mold sleeve, the diaphragm is easily damaged when the battery cell falls directly into the bottom of the mold sleeve, resulting in a decrease in battery performance. The first lifting drive member drives the push rod to lift up so that the push rod holds the battery cell to prevent the battery cell from falling directly into the bottom of the mold sleeve.

[0062] S200: Start the first lifting drive member to lower the ejector pin and make the battery core contact with the bottom wall of the mold sleeve.

[0063] In this embodiment, after the push rod holds the battery cell, the first lifting drive member drives the push rod to descend, thereby driving the battery cell to descend together, so as to reduce the force when the battery cell contacts the bottom wall of the mold sleeve, thereby avoiding the problem of damage to the diaphragm of the battery cell due to the large force.

[0064] S300: Start the first rotary driving member to rotate the rotary disk to the tab positioning mechanism.

[0065] In this embodiment, after the battery cell is loaded into the mold sleeve, the first rotating drive member drives the rotating disk to rotate to rotate the battery cell into the pole tab positioning mechanism. The pole tab positioning mechanism positions the pole tab on the battery cell so that when the gasket is placed, the pole tab hole of the gasket accurately passes through the pole tab to avoid the gasket abutting against the pole tab and folding the pole tab.

[0066] S400: Start the rotating assembly to make the rotating assembly contact with the outer wall of the mold sleeve.

[0067] In this embodiment, when the battery core rotates to the tab positioning mechanism, the rotating assembly is started, so that the rotating action end of the rotating assembly abuts against the outer wall of the mold sleeve.

[0068] S500: Start the second lifting drive member to lower the positioning detection member, and start the rotating assembly to drive the mold sleeve to rotate. When the pole ear of the battery cell rotates to the positioning detection member, the positioning detection member releases a signal to stop the rotating assembly from rotating.

[0069] In this embodiment, after the rotating action end of the rotating assembly abuts against the outer wall of the mold sleeve, the rotating assembly rotates to drive the mold sleeve to rotate together. At this time, the pole ear on the battery cell also rotates together. When the pole ear rotates to a predetermined position, the positioning detection component detects that the pole ear is in place, indicating that the pole ear is now in the best position for assembling the film. The positioning detection component releases a signal to stop the rotating assembly and complete the positioning of the pole ear.

[0070] S600: Start the second lifting drive member to reset the positioning detection member, and start the first rotating drive member to rotate the rotating disk to the next station.

[0071] In this embodiment, after the positioning of the pole ear is completed, the second lifting drive member drives the positioning detection member to move upward so that the positioning detection member is reset to avoid the positioning detection member interfering with the next group of battery cells arriving at the workstation, and then the first rotating drive member drives the rotating disk to rotate to rotate the positioned pole ear to the next workstation for gasket assembly.

[0072] It is understandable that when the robot grabs the battery cell and places it into the mold sleeve, the push rod 710 is lifted into the mold sleeve to abut against the bottom of the battery cell, but the push rod 710 cannot be lifted to be flush with the feed port of the mold sleeve, otherwise the battery cell will be pushed out of the mold sleeve by the push rod 710 after the robot is released, that is, the battery cell will abut against the push rod 710 after a period of free fall in the mold sleeve. At this time, there is still a certain force when the battery cell contacts the push rod 710, that is, there is still a risk of damage to the diaphragm. Therefore, in order to reduce the force when the push rod 710 contacts the battery cell, such as Figure 7As shown, in one embodiment, an elastic buffer layer 712 is provided at one end of the conical top holding portion 711 adjacent to the mold sleeve, and the elastic buffer layer 712 includes a first elastic buffer portion 712a and a second elastic buffer portion 712b connected to each other, the first elastic buffer portion 712a is used to abut against the battery cell, and the second elastic buffer portion 712b is connected to the conical top holding portion 711, the diameter of the first elastic buffer portion 712a gradually decreases from top to bottom, the diameter of the second elastic buffer portion 712b gradually increases from top to bottom, and the maximum diameter of the first elastic buffer portion 712a is smaller than the maximum diameter of the second elastic buffer portion 712b, and the maximum diameter of the second elastic buffer portion 712b is equal to the minimum diameter of the conical top holding portion 711. In this embodiment, the elastic buffer layer 712 is made of an elastic material such as silicone or rubber, and the first elastic buffer portion 712a and the second elastic buffer portion 712b are an integrally formed structure. The diameter of the top of the first elastic buffer portion 712a needs to be larger than the diameter of the circular hole of the battery cell to prevent the elastic buffer layer 712 from sinking into the circular hole of the battery cell when the elastic buffer layer 712 a abuts against the battery cell. In this way, when the first elastic buffer portion 712a abuts against the battery cell, the contact area between the first elastic buffer portion 712a and the battery cell is guaranteed, and the first elastic buffer portion 712a and the second elastic buffer portion 712b jointly play a buffering role, thereby reducing the force of the top rod 710 when it contacts the battery cell, further avoiding the problem of diaphragm damage of the battery cell. Furthermore, the diameter of the first elastic buffer portion 712a gradually decreases from top to bottom to ensure the contact area between the top of the first elastic buffer portion 712a and the battery cell, and because the side of the first elastic buffer portion 712a is inclined inward, and the maximum diameter of the first elastic buffer portion 712a is smaller than the maximum diameter of the second elastic buffer portion 712b, the pole ear will not contact the side of the first elastic buffer portion 712a when falling. The diameter of the second elastic buffer portion 712b gradually increases from top to bottom, and the maximum diameter of the bottom of the second elastic buffer portion 712b is equal to the minimum diameter of the top of the conical top holding portion 711, so that the side of the second elastic buffer portion 712b and the side of the conical top holding portion 711 form a complete guiding inclined surface, so that when the pole ear at the bottom of the battery cell moves downward, the pole ear can slide down along the guiding inclined surface, specifically, the pole ear slides along the side of the second elastic buffer portion 712b, further avoiding the pole ear from being crushed.

[0073] Furthermore, if Figure 8As shown, in one embodiment, the periphery of the first elastic buffer portion 712a is provided with a chamfered structure 7121, and the chamfered structure 7121 is used to abut against the pole ear. It can be understood that after the battery core abuts against the bottom wall of the mold sleeve, the ejector pin is pulled out of the mold sleeve. When the ejector pin is pulled out of the mold sleeve, there is a risk that the periphery of the first elastic buffer portion 712a abuts against the pole ear, and if the periphery of the first elastic buffer portion 712a is too sharp, it will scratch the pole ear. In this embodiment, by providing a chamfered structure 7121 on the periphery of the first elastic buffer portion 712a, the chamfered structure 7121 is used to abut against the pole ear when the ejector pin is pulled out of the mold sleeve, and the contact surface of the chamfered structure 7121 is an arc surface, so that the periphery of the first elastic buffer portion 712a has a smaller force when in contact with the pole ear, thereby preventing the pole ear from being scratched.

[0074] Furthermore, if Figure 8As shown, in one embodiment, the second elastic buffer portion 712b is sleeved on the conical top holding portion, and a smooth elastic connection surface is provided at the abutment between the conical top holding portion and the second elastic buffer portion 712b. A buffer cavity 7122 is provided inside the second elastic buffer portion 712b, and the buffer cavity 7122 is used to shrink when the battery cell is pressed down, so that the height of the second elastic buffer portion 712b is reduced. It can be understood that when the pole ear abuts against the second elastic buffer portion 712b and the conical top holding portion, the pole ear slides along the guiding inclined surface of the second elastic buffer portion 712b and the conical top holding portion, avoiding the pole ear from being folded, that is, the pole ear will not be folded to form 90°. However, if the pole ear first contacts the conical top holding portion when falling, and because the conical top holding portion is a rigid structure, there is a certain impact force when the pole ear falls, and the conical top holding portion is easy to scratch the pole ear. In this embodiment, a buffer cavity 7122 is provided inside the second elastic buffer portion 712b, that is, the inside of the second elastic buffer portion 712b is a hollow part, and the second elastic buffer portion 712b is sleeved on the conical top holding portion. When the battery cell is pressed down, the first elastic buffer portion 712a transfers the force to the second elastic buffer portion 712b, and the second elastic buffer portion 712b descends along the inclined surface of the conical top holding portion, thereby reducing the height of the second elastic buffer portion 712b. At the same time, the buffer cavity 7122 inside the second elastic buffer portion 712b is compressed, thereby further reducing the height of the second elastic buffer portion 712b. In this way, the overall height of the elastic buffer layer is reduced when the battery cell is pressed down, so that the second elastic buffer portion 712b partially overlaps with the conical top holding portion 711, which facilitates the contact between the pole ear and the second elastic buffer portion 712b first, thereby avoiding the rigid collision between the pole ear and the conical top holding portion 711, and further preventing the pole ear from being scratched. The smooth elastic connecting surface is arranged at the abutment point where the conical top holding portion and the second elastic buffer portion 712b abut. When the battery cell is pressed down, the smooth elastic connecting surface is subjected to force and deforms to a certain extent. When the top rod is pulled out of the mold sleeve, the smooth elastic connecting surface returns to its original state, so that the second elastic buffer portion 712b sleeved on the smooth elastic connecting surface is reset, that is, the second elastic buffer portion 712b returns to its initial position, and the pole ear will further avoid rigid collision with the conical top holding portion 711.

[0075] It can be understood that the rotating table 615 rotates to drive the mold sleeve to rotate, and then the pole ear on the battery cell is rotated to a predetermined position to complete the positioning. The rotating table 615 abuts against the outer wall of the mold sleeve, and the rotating table 615 drives the mold sleeve to rotate by friction. However, since the abutting surface between the rotating table 615 and the mold sleeve is a plane, there is a problem that the rotating table 615 drives the mold sleeve to rotate with low precision. Therefore, in order to make the rotating table 615 better drive the mold sleeve to rotate, such as Figure 8As shown, in one embodiment, the outer periphery of the rotating truncated table 615 is provided with a plurality of rotating convex strips 616 arranged at intervals, each of the rotating convex strips 616 includes a first convex strip body 616a and a second convex strip body 616b connected to each other, the first convex strip body 616a and the horizontal plane have a first angle, the second convex strip body 616b and the horizontal plane have a second angle, and the first angle and the second angle are complementary angles. In this embodiment, the first convex strip body 616a and the second convex strip body 616b are an integrally formed structure, and the first convex strip body 616a and the second convex strip body 616b can be made of materials with a high friction coefficient such as silicone or rubber. The first convex strip body 616a and the second convex strip body 616b make the surface of the rotating truncated table 615 form an uneven structure, that is, the roughness of the surface of the rotating truncated table 615 is increased, so that the friction between the rotating truncated table 615 and the outer wall of the mold sleeve is increased, so that the rotating truncated table 615 can better drive the mold sleeve to rotate. Furthermore, the first convex strip body 616a and the second convex strip body 616b are both obliquely arranged on the surface of the rotating table 615, and the first angle and the second angle are complementary angles, that is, the angle at the connection between the first convex strip body 616a and the second convex strip body 616b is 90°, so that the first convex strip body 616a and the second convex strip body 616b form an "arrow" shaped structure along the rotation direction, so that the first convex strip body 616a and the second convex strip body 616b play a guiding role when abutting against the outer wall of the mold sleeve, so as to better drive the mold sleeve to rotate.

[0076] Compared with the prior art, the present invention has at least the following advantages:

[0077] 1. When the above-mentioned pre-gasket positioning and fixing device 10 is used to place the battery cell into the receiving groove 500a of the mold sleeve 500 by a robot, the first lifting and driving member drives the push rod 710 to move upward so that the end of the push rod 710 passes through the avoidance hole and abuts against the bottom of the battery cell. At this time, the first lifting and driving member drives the push rod 710 to move downward to drive the battery cell to move downward together in the mold sleeve 500 until the battery cell abuts against the bottom wall of the receiving groove 500a, thereby reducing the force when the battery cell contacts the bottom wall of the receiving groove 500a, thereby avoiding the problem of damage to the diaphragm of the battery cell due to excessive force.

[0078] 2. The above-mentioned positioning and fixing device 10 before placing the gasket, after fixing the battery cell in the mold sleeve 500, the first rotating drive member 400 drives the rotating disk 200 to rotate to the pole ear positioning mechanism 600, at this time, the second lifting drive member 622 drives the positioning detection member 624 to descend to a predetermined position, and the rotating assembly 610 is started to abut against the mold sleeve 500 and rotate the mold sleeve 500, thereby driving the battery cell in the mold sleeve 500 to rotate together, when the pole ear on the battery cell rotates to be opposite to the positioning detection member 624, the positioning detection member 624 releases a signal to stop the rotating assembly 610 from rotating, thereby completing the positioning of the pole ear, and the rotating disk 200 continues to rotate to rotate the battery cell to the gasket placement station, so that the pole ear hole of the gasket can accurately pass through the pole ear during the insertion process of the gasket, thereby avoiding the problem of the pole ear bending caused by the contact between the gasket and the pole ear.

[0079] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be based on the attached claims.

Claims

1. A positioning and fixing device before placing a gasket, comprising a bottom plate, a rotating disk, a top plate, a first rotating driving member and a plurality of mold sleeves, wherein the first rotating driving member is mounted on the bottom plate, the power output end of the first rotating driving member is connected to the rotating disk, the top plate is connected to the bottom plate through a connecting column, the top plate is slidably connected to the rotating disk, the rotating disk is provided with a plurality of embedding grooves arranged at intervals, the mold sleeve is located in the corresponding embedding grooves, the mold sleeve is provided with a receiving groove, the receiving groove is used to receive a battery cell, and is characterized in that: The positioning and fixing device before placing the gasket also includes a tab positioning mechanism and a battery cell protection mechanism, the battery cell protection mechanism includes a first lifting drive member and a push rod, the first lifting drive member is installed on the bottom plate, the push rod is connected to the power output end of the first lifting drive member, the mold sleeve is provided with an avoidance hole connected to the accommodating groove, and the push rod is movably inserted into the avoidance hole; The tab positioning mechanism includes a rotating assembly and a positioning detection assembly, wherein the rotating assembly is mounted on the bottom plate, and is used to drive the mold sleeve to rotate when it abuts against the mold sleeve, and the positioning detection assembly includes a mounting frame, a second lifting drive member, a bracket and a positioning detection member, wherein the mounting frame is mounted on the top plate, the second lifting drive member is connected to the mounting frame, the power output end of the second lifting drive member is connected to the bracket, the positioning detection member is connected to the bracket, and the positioning detection member is used to detect the rotation position of the tab of the battery cell, so that the rotating assembly stops rotating when the tab of the battery cell rotates to a predetermined position.

2. The positioning and fixing device before placing the gasket according to claim 1, characterized in that: A conical supporting portion is provided at one end of the ejector rod adjacent to the mold sleeve.

3. The positioning and fixing device before placing the gasket according to claim 2, characterized in that: The surface of the conical top holding portion is provided with an electroplating layer.

4. The positioning and fixing device before placing the gasket according to claim 1, characterized in that: There are two positioning detection members, which are spaced apart on the bracket. When the rotating assembly is used to rotate the tab of the battery cell to between the two positioning detection members, the rotating assembly stops rotating.

5. The positioning and fixing device before placing the gasket according to claim 1, characterized in that: The rotating assembly includes a fixed seat, a horizontal driving member, a second rotating driving member, a connecting plate and a rotating table. The fixed seat is installed on the base plate, the horizontal driving member is connected to the fixed seat, the power output end of the horizontal driving member is connected to the connecting plate, the second rotating driving member is installed on the connecting plate, the rotating table is connected to the power rotating end of the second rotating driving member, and the rotating table is in sliding contact with the mold sleeve.

6. The positioning and fixing device before placing the gasket according to claim 5, characterized in that: The outer periphery of the rotating table is covered with a silicone sleeve.

7. The positioning and fixing device before placing the gasket according to claim 5, characterized in that: The fixing seat is provided with a guide rail, the connecting plate is provided with a sliding groove, and the guide rail is embedded in the sliding groove so that the connecting plate slides along the extending direction of the guide rail.

8. The positioning and fixing device before placing the gasket according to claim 1, characterized in that: The mold sleeve includes a sleeve cup and a fixed plate, the fixed plate is connected to the rotating disk, the fixed plate is provided with a sleeve hole, one end of the sleeve cup away from the bottom plate is sleeved in the sleeve hole, and the accommodating groove and the avoidance hole are both provided in the sleeve cup.

9. The positioning and fixing device before placing the gasket according to claim 7, characterized in that: The mold sleeve also includes a screw connection piece, the fixed plate is provided with a first screw connection hole, the rotating disk is provided with a second screw connection hole, and the screw connection piece passes through the first screw connection hole and the second screw connection hole in sequence to enable the fixed plate to be screwed to the rotating disk.

10. A method for positioning and fixing a tab before placing a gasket, characterized in that: The positioning is performed by using the positioning and fixing device before placing the gasket according to any one of claims 1 to 9, and the method for positioning and fixing the tab before placing the gasket comprises the following steps: The battery cell is placed into the mold sleeve by a manipulator, and the first lifting drive member is started to lift the ejector rod and hold the bottom of the battery cell; Start the first lifting drive member to lower the ejector pin and make the battery core contact with the bottom wall of the mold sleeve; Starting the first rotary drive member to rotate the rotary disk to the tab positioning mechanism; Starting the rotating assembly to make the rotating assembly abut against the outer wall of the mold sleeve; The second lifting drive member is started to lower the positioning detection member, and the rotating assembly is started to drive the mold sleeve to rotate. When the tab of the battery cell rotates to the positioning detection member, the positioning detection member releases a signal to stop the rotating assembly from rotating. The second lifting driving member is started to reset the positioning detection member, and the first rotating driving member is started to rotate the rotating disk into the next station.

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