Positioning and fixing device before gasket placement

Abstract

The utility model provides a positioning and fixing device used 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, in particular to a positioning and fixing device before inserting a gasket. BACKGROUND

[0002] In the production process of the battery, the 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, the rotating disc drives the mold sleeve to rotate, when the mold sleeve rotates to the predetermined position, the insertion mechanism inserts the gasket from top to bottom into the battery cell, and makes the tab pass through the avoidance hole of the gasket.

[0003] However, since the battery cell is put into the mold sleeve by the robot, the height of the mold sleeve is large, and the battery cell makes free fall motion under the gravity after falling into the mold sleeve, so that the speed of the battery cell is large when it abuts against the bottom wall of the mold sleeve, which causes the force between the diaphragm of the battery cell and the bottom wall of the mold sleeve to be large, and further causes the diaphragm of the battery cell to be damaged, affecting the performance of the battery; on the other hand, due to the deviation of the rotating position of the battery, when the insertion mechanism inserts the gasket into the battery, the tab hole of the gasket and the tab are not aligned, which causes the gasket to easily touch the tab during the insertion process, and further causes the tab to be bent or the gasket to be unable to be accurately inserted into the battery, that is, the positioning of the battery rotation is not accurate enough.

[0004] Therefore, there is an urgent need for a battery assembly device that can prevent the diaphragm of the battery cell from being damaged and has high positioning accuracy when the gasket is inserted. Invention content

[0005] The purpose of the present disclosure is to overcome the shortcomings in the prior art, and to provide a positioning and fixing device before inserting a gasket that can prevent the diaphragm of the battery cell from being damaged and has high positioning accuracy when the gasket is inserted.

[0006] The purpose of the present disclosure is achieved by the following technical solutions:

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

[0008] a bottom plate, a rotating disc, a top plate, a first rotating drive and a plurality of mold sleeves, the first rotating drive is installed on the bottom plate, the power output end of the first rotating drive is connected with the rotating disc, the top plate is connected with the bottom plate through a connecting column, the top plate is slidingly connected with the rotating disc, the rotating disc is provided with a plurality of embedded grooves arranged at intervals, the mold sleeve is located in the corresponding embedded groove, the mold sleeve is provided with a accommodating groove for accommodating the battery cell,

[0009] The pre-pad positioning and fixing device further comprises a tab positioning mechanism and a battery cell protection mechanism, the battery cell protection mechanism comprises a first lifting driving element and a top rod, the first lifting driving element is installed on the bottom plate, the top rod is connected with the power output end of the first lifting driving element, the die sleeve is provided with an avoiding hole which is in communication with the accommodating groove, and the top rod is movably arranged in the avoiding hole;

[0010] The tab positioning mechanism comprises a rotary rotating assembly and a positioning detection assembly, the rotary rotating assembly is installed on the bottom plate, the rotary rotating assembly is used to drive the die sleeve to rotate when the die sleeve abuts against the rotary rotating assembly, the positioning detection assembly comprises a mounting frame, a second lifting driving element, a support and a positioning detection element, the mounting frame is installed on the top plate, the second lifting driving element is connected with the mounting frame, the power output end of the second lifting driving element is connected with the support, and the positioning detection element is connected with the support; the positioning detection element is used to detect the rotating position of the tab of the battery cell, so that the rotary rotating assembly stops rotating when the tab of the battery cell rotates to the predetermined position.

[0011] In one of the embodiments, one end of the top rod adjacent to the die sleeve is provided with a tapered top holding part.

[0012] In one of the embodiments, the surface of the tapered top holding part is provided with an electroplated layer.

[0013] In one of the embodiments, the number of the positioning detection elements is two, the two positioning detection elements are arranged at intervals on the support, and the rotary rotating assembly is used to stop rotating when the tab of the battery cell is rotated to between the two positioning detection elements.

[0014] In one of the embodiments, the rotary rotating assembly comprises a fixed seat, a horizontal driving element, a second rotary driving element, a connecting plate and a rotary circular table, the fixed seat is installed on the bottom plate, the horizontal driving element is connected with the fixed seat, the power output end of the horizontal driving element is connected with the connecting plate, the second rotary driving element is installed on the connecting plate, the rotary circular table is connected with the power rotating end of the second rotary driving element, and the rotary circular table is in sliding abutment with the die sleeve.

[0015] In one of the embodiments, the outer periphery of the rotary circular table is provided with a silica gel sleeve.

[0016] In one of the embodiments, the fixed 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 extension direction of the guide rail.

[0017] In one of the embodiments, the mold sleeve comprises a sleeve cup and a fixing plate, the fixing plate is connected with the rotating disc, the fixing plate is provided with a sleeve connecting hole, and the sleeve cup is sleeved in the sleeve connecting hole away from the bottom plate.

[0018] In one of the embodiments, the mold sleeve further comprises a screwing piece, the fixing plate is provided with a first screwing hole, the rotating disc is provided with a second screwing hole, and the screwing piece passes through the first screwing hole and the second screwing hole in sequence to screw the fixing plate and the rotating disc.

[0019] In one of the embodiments, the first lifting driving piece is installed on the side of the bottom plate away from the top plate, the bottom plate is provided with a through hole, and the power output end of the first lifting driving piece is connected with the top rod through the through hole.

[0020] Compared with the prior art, the present disclosure has at least the following advantages:

[0021] 1. The above-mentioned positioning and fixing device before placing the gasket, when the mechanical hand puts the battery cell into the accommodating groove of the mold sleeve, the first lifting driving piece drives the top rod to move upward, so that the end of the top rod abuts against the bottom of the battery cell through the avoiding hole, at this time, the first lifting driving piece drives the top rod to move downward to drive the battery cell to move downward in the mold sleeve together, until the battery cell abuts against the bottom wall of the accommodating groove, so as to reduce the acting force when the battery cell contacts with the bottom wall of the accommodating groove, and further avoid the damage problem of the diaphragm of the battery cell caused by excessive acting force.

[0022] 2. The above-mentioned positioning and fixing device before placing the gasket, after fixing the battery cell in the mold sleeve, the first rotating driving piece drives the rotating disc to rotate to the tab positioning mechanism, at this time, the second lifting driving piece drives the positioning detection piece to descend to the predetermined position, the rotating and rotating assembly is started to abut against the mold sleeve and make the mold sleeve rotate and drive the battery cell in the mold sleeve to rotate together, when the tab on the battery cell rotates to be opposite to the positioning detection piece, the positioning detection piece releases the signal to make the rotating and rotating assembly stop rotating, so as to complete the positioning of the tab, the rotating disc continues to rotate to rotate the battery cell to the gasket placing station, so that the tab hole of the gasket can accurately pass through the tab in the process of inserting, and avoid the tab bending problem caused by the contact between the gasket and the tab. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 A schematic view of a structure of a pre-gasket positioning and fixing device according to an embodiment;

[0025] Figure 2 A schematic view of a structure of a pre-gasket positioning and fixing device according to an embodiment; Figure 1 A schematic view of a structure of a pre-gasket positioning and fixing device according to an embodiment;

[0026] Figure 3 A schematic view of a structure of a pre-gasket positioning and fixing device according to an embodiment; Figure 1 A schematic view of a structure of a pre-gasket positioning and fixing device according to an embodiment;

[0027] Figure 4 A schematic view of a structure of a pre-gasket positioning and fixing device according to an embodiment; Figure 1 A schematic view of a structure of a pre-gasket positioning and fixing device according to an embodiment;

[0028] Figure 5 A schematic view of a structure of a pre-gasket positioning and fixing device according to an embodiment; Figure 1 A schematic view of a structure of a pre-gasket positioning and fixing device according to an embodiment;

[0029] Figure 6 A schematic view of a cross section of a top rod according to an embodiment;

[0030] Figure 7 A schematic view of a cross section of a spring buffer according to an embodiment;

[0031] Figure 8 A schematic view of a cross section of a rotating circular platform according to an embodiment. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present disclosure, a more complete understanding of the present disclosure will be provided by reference to the related drawings. The preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present disclosure can be more thoroughly and completely understood.

[0033] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0035] The disclosure provides a kind of before positioning and fixing device of laying gasket, including bottom plate, rotary disc, top plate, first rotary drive, multiple die sleeve, tab positioning mechanism and electric core protection mechanism, the first rotary drive is installed to the bottom plate, the power output end of the first rotary drive is connected with the rotary disc, the top plate is connected with the bottom plate by connecting column, the top plate is slidably connected with the rotary disc, the rotary disc is equipped with multiple interval arrangement embedding slot, the die sleeve is located in the embedding slot, the die sleeve is equipped with accommodation groove, and the accommodation groove is used to accommodate electric core;The positioning and fixing device before laying gasket further includes tab positioning mechanism and electric core protection mechanism, the electric core protection mechanism includes first lifting drive and top rod, the first lifting drive is installed to the bottom plate, the top rod is connected with the power output end of the first lifting drive, the die sleeve is equipped with the position hole that is connected with the accommodation groove, and the top rod is movably arranged in the position hole;Tab positioning mechanism includes rotary rotating component and positioning detection component, the rotary rotating component is installed to the bottom plate, the rotary rotating component is used to drive the die sleeve to rotate when being abutted with the die sleeve, the positioning detection component includes mounting bracket, second lifting drive, support and positioning detection piece, the mounting bracket is installed to the top plate, the second lifting drive is connected with the mounting bracket, the power output end of the second lifting drive is connected with the support, the positioning detection piece is connected with the support, and the positioning detection piece is used to detect the rotary position of the tab of electric core, so that the rotary rotating component stops rotating when the tab of electric core rotates to predetermined position.

[0036] When the mechanical arm places the battery cell into the accommodating groove of the mold cover, the first lifting driving element drives the ejector rod to move upward, so that the end of the ejector rod penetrates through the avoidance hole and abuts against the bottom of the battery cell. At this time, the first lifting driving element drives the ejector rod to move downward, so as to drive the battery cell to move downward in the mold cover together until the battery cell abuts against the bottom wall of the accommodating groove. In this way, the acting force when the battery cell contacts with the bottom wall of the accommodating groove is reduced, and the damage of the diaphragm of the battery cell caused by excessive acting force is avoided. After the battery cell is fixed in the mold cover, the first rotating driving element drives the rotating disc to rotate to the tab positioning mechanism. At this time, the second lifting driving element drives the positioning detection element to descend to the predetermined position, the rotating rotating assembly is started to abut against the mold cover and make the mold cover rotate, and then drive the battery cell in the mold cover to rotate together. When the tab on the battery cell rotates to be opposite to the positioning detection element, the positioning detection element releases a signal to make the rotating rotating assembly stop rotating. In this way, the positioning of the tab is completed. The rotating disc continues to rotate to rotate the battery cell into the pad placement station, so that the tab hole of the pad can accurately penetrate through the tab during the insertion process, and the tab bending problem caused by the contact between the pad and the tab is avoided.

[0037] In order to better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure will be further described in detail below in combination with specific embodiments:

[0038] The pad placement positioning and fixing device 10 of an embodiment includes a bottom plate 100, a rotating disc 200, a top plate 300, a first rotating driving element 400, a plurality of mold covers 500, a tab positioning mechanism 600 and a battery cell protection mechanism 700. The first rotating driving element 400 is installed on the bottom plate 100, the power output end of the first rotating driving element 400 is connected with the rotating disc 200, the top plate 300 is connected with the bottom plate 100 through a connecting column, the top plate 300 is slidingly connected with the rotating disc 200, the rotating disc 200 is provided with a plurality of embedded grooves arranged at intervals, the mold cover 500 is located in the corresponding embedded groove, the mold cover 500 is provided with an accommodating groove 500a for accommodating the battery cell, so that the rotating disc 200 drives the mold cover 500 to rotate together.

[0039] Further, the gasket pre-positioning and fixing device 10 further comprises a tab positioning mechanism 600 and a battery cell protection mechanism 700. The battery cell protection mechanism 700 comprises a first lifting driving member (not shown in the figure) and a top rod 710. The first lifting driving member is installed on the bottom plate 100. The top rod 710 is connected with the power output end of the first lifting driving member. Specifically, the first lifting driving member is installed on the bottom side of the bottom plate. The output shaft of the first lifting driving member is connected with the top rod 710 through the through hole of the bottom plate. The mold sleeve 500 is provided with an avoiding hole which is in communication with the accommodating groove 500a. The top rod 710 is movably arranged in the avoiding hole. The first lifting driving member is used to drive the top rod 710 to abut against the battery cell after the top rod 710 passes through the avoiding hole, so that the top rod 710 drives the battery cell to descend and abut against the bottom wall of the embedding groove.

[0040] Further, the tab positioning mechanism 600 comprises a rotary rotating assembly 610 and a positioning detection assembly 620. The rotary rotating assembly 610 is installed on the bottom plate 100. The rotary rotating assembly 610 is used to drive the mold sleeve 500 to rotate when the rotary rotating assembly 610 abuts against the mold sleeve 500. The positioning detection assembly 620 comprises a mounting frame 621, a second lifting driving member 622, a support 623 and a positioning detection member 624. The mounting frame 621 is installed on the top plate 300. The second lifting driving member 622 is connected with the mounting frame 621. The power output end of the second lifting driving member 622 is connected with the support 623. The positioning detection member 624 is connected with the support 623. The positioning detection member 624 is used to detect the rotating position of the tab 10a of the battery cell, so that the rotary rotating assembly stops rotating when the tab of the battery cell rotates to the predetermined position. The rotary rotating assembly 610 stops rotating.

[0041] In the embodiment, a plurality of die sleeves 500 are arranged on the rotating disc 200, and each die sleeve 500 is arranged in the embedding groove, so that the device can continuously fix and position the battery cell in each die sleeve 500. Specifically, when the battery cell is placed into the accommodating groove 500a by the mechanical arm, since the depth of the die sleeve 500 is large, the battery cell directly falls into the bottom wall of the accommodating groove 500a with large force, which is easy to damage the diaphragm of the battery cell. At this time, the first lifting driving element 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 driving element drives the top rod 710 to descend, so that the top rod 710 drives the battery cell to descend, thereby reducing the force when the battery cell abuts against the groove wall of the accommodating groove 500a. Further, after the battery cell is fixed, the rotating disc 200 rotates to rotate the battery cell to the tab positioning mechanism 600. At this time, the second lifting driving element 622 drives the positioning detection element 624 to descend, so as to position the tab 10a on the battery cell. The rotating rotating assembly 610 is started to abut against the outer wall of the die sleeve 500. The rotating rotating assembly 610 drives the die sleeve 500 to rotate, so as to drive the tab 10a on the battery cell to rotate. When the tab 10a rotates to the position opposite to the positioning detection element 624, it indicates that the tab 10a is located at the predetermined position. The positioning detection element 624 releases the signal to stop the rotating rotating assembly 610 from rotating, and makes the rotating rotating assembly 610 not abut against the outer wall of the die sleeve 500. The second lifting driving element 622 drives the positioning detection element 624 to reset. The rotating disc 200 rotates to rotate the battery cell to the gasket placing station. In the embodiment, the positioning detection element 624 is a sensor.

[0042] When the mechanical arm places the battery cell into the accommodating groove 500a of the mold sleeve 500, the first lifting driving member drives the top rod 710 to move upward, so that the end of the top rod 710 abuts against the bottom of the battery cell through the avoiding hole. At this time, the first lifting driving member drives the top rod 710 to move downward, so that the battery cell moves downward together in the mold sleeve 500 until the battery cell abuts against the bottom wall of the accommodating groove 500a. In this way, the contact force between the battery cell and the bottom wall of the accommodating groove 500a is reduced, and the damage of the diaphragm of the battery cell caused by excessive contact force is avoided. After the battery cell is fixed in the mold sleeve 500, the first rotating driving member 400 drives the rotating disc 200 to rotate to the tab positioning mechanism 600. At this time, the second lifting driving member 622 drives the positioning detection member 624 to descend to a predetermined position, and the rotating rotating assembly 610 is started to abut against the mold sleeve 500 and make the mold sleeve 500 rotate, thereby driving the battery cell in the mold sleeve 500 to rotate together. When the tab 10a on the battery cell rotates to be opposite to the positioning detection member 624, the positioning detection member 624 releases a signal to make the rotating rotating assembly 610 stop rotating. In this way, the positioning of the tab 10a is completed, and the rotating disc 200 continues to rotate to rotate the battery cell to the gasket placing station, so that the tab 10a hole of the gasket can accurately pass through the tab 10a during the insertion process, and the bending problem of the tab 10a caused by the contact between the gasket and the tab 10a is avoided.

[0043] As shown in Figure 3 In one embodiment, the end of the top rod 710 is provided with a tapered top holding portion 711 adjacent to one end of the mold sleeve 500. It can be understood that when the top rod 710 abuts against the battery cell, the end of the top rod 710 may contact the tab 10a, and the tab 10a is easily pressed and folded by the top rod 710. By providing the tapered top holding portion 711 on the end of the top rod 710, when the tab 10a abuts against the tapered top holding portion 711, the tab 10a can slide along the inclined surface of the tapered top holding portion 711, thereby avoiding the tab 10a being pressed and folded by the top rod 710.

[0044] In one embodiment, the surface of the tapered top holding portion 711 is provided with an electroplated layer. It can be understood that the surface of the tapered top holding portion 711 is provided with an electroplated layer, so that the surface of the tapered top holding portion 711 is smoother, and the tab 10a can slide along the inclined surface of the tapered top holding portion 711 better.

[0045] As shown in Figure 2 and Figure 4As shown, in one embodiment, there are two positioning detection elements 624, which are spaced apart on the bracket 623. The rotation assembly 610 stops rotating when the electrode 10a of the battery cell is rotated between the two positioning detection elements 624. In this embodiment, the two positioning detection elements 624 are spaced apart on the bracket 623, and the rotation path of the electrode 10a passes through the gap between the two positioning detection elements 624. When the electrode 10a rotates between the two positioning detection elements 624, it indicates that the electrode 10a is at a predetermined position, and the positioning detection element 624 releases a signal to stop the rotation assembly 610.

[0046] like Figure 5 As shown, in one embodiment, the rotating assembly 610 includes a fixed base 611, a horizontal drive member 612, a second rotating drive member 613, a connecting plate 614, and a rotating frustum 615. The fixed base 611 is mounted on the base plate 100. The horizontal drive member 612 is connected to the fixed base 611. The power output end of the horizontal drive member 612 is connected to the connecting plate 614. The second rotating drive member 613 is mounted on the connecting plate 614. The rotating frustum 615 is connected to the power rotation end of the second rotating drive member 613. The rotating frustum 615 slides against the mold sleeve 500. Understandably, the horizontal drive member 612 drives the connecting plate 614 to move horizontally so that the rotating platform 615 approaches or moves away from the outer wall of the mold 500. When the horizontal drive member 612 drives the rotating platform 615 to abut against the outer wall of the mold 500, the second rotating drive member 613 drives the rotating platform 615 to rotate, thereby causing the battery cell inside the mold 500 to rotate together, so as to rotate the tab 10a to a predetermined position. After the tab 10a is positioned, the second rotating drive member 613 stops working, the horizontal drive member 612 drives the rotating platform 615 away from the outer wall of the mold 500, and the rotating disk 200 rotates to rotate the battery cell to the next station.

[0047] In one embodiment, a silicone sleeve is fitted around the outer periphery of the rotating frustum 615. It is understood that the rotating frustum 615 abuts against the outer wall of the mold sleeve 500, causing the rotating frustum 615 to drive the mold sleeve 500 to rotate. By providing a silicone sleeve on the outer periphery of the rotating frustum 615, the friction between the rotating frustum 615 and the mold sleeve 500 is increased, thereby better driving the mold sleeve 500 to rotate.

[0048] like Figure 5As shown in the drawings, in one of the embodiments, the fixing seat 611 is provided with a guide rail 611a, and 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 fixing seat 611 is provided with the guide rail 611a, 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 turntable 615 to approach or move away from the outer wall of the mold sleeve 500.

[0049] As shown in the drawings, Figure 2 and Figure 5 As shown in the drawings, in one of the embodiments, the mold sleeve 500 includes a sleeve cup 510 and a fixing plate 520, the fixing plate 520 is connected with the rotating disc 200, the fixing plate 520 is provided with a sleeve hole, the sleeve cup 510 is sleeved in the sleeve hole away from one end of the bottom plate 100, and the accommodation groove 500a and the avoiding hole are both provided in the sleeve cup 510. It can be understood that the fixing plate 520 is connected with the rotating disc 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 fixing plate 520, the top rod 710 passes through the avoiding hole of the sleeve cup 510 and abuts against the battery cell.

[0050] As shown in the drawings, Figure 2 and Figure 5 As shown in the drawings, in one of the embodiments, the mold sleeve 500 further includes a screwing piece, the fixing plate 520 is provided with a first screwing hole 521, the rotating disc 200 is provided with a second screwing hole, and the screwing piece sequentially passes through the first screwing hole 521 and the second screwing hole, so that the fixing plate 520 is screwed with the rotating disc 200. In this embodiment, the screwing piece is a screw, and the fixing plate 520 and the rotating disc 200 are screwed and fixed by the screw. In another embodiment, the fixing plate 520 can also be clamped with the rotating disc 200, that is, the fixing plate 520 is provided with a clamping hole, and the rotating disc 200 is provided with a clamping column, and the clamping column is clamped in the clamping hole, so that the fixing plate 520 is clamped with the rotating disc 200.

[0051] In one of the embodiments, the first lifting driving piece is installed on the side of the bottom plate away from the top plate, and the bottom plate is provided with a through hole, and the power output end of the first lifting driving piece passes through the through hole and is connected with the top rod. It can be understood that the bottom plate is installed on the workbench of the equipment, and the first lifting driving piece is embedded in the workbench, so that the structure of the device is more compact.

[0052] Understandably, when the robotic arm picks up the battery cell and places it into the mold, the push rod 710 rises into the mold to abut against the bottom of the battery cell. However, the push rod 710 cannot rise to be flush with the feed inlet of the mold; otherwise, after the robotic arm releases, the battery cell will be pushed out of the mold by the push rod 710. That is, the battery cell will undergo a period of free fall within the mold before contacting the push rod 710. At this point, there is still a certain force when the battery cell contacts the push rod 710, meaning there is still a risk of damage to the diaphragm. Therefore, to reduce the force when the push rod 710 contacts the battery cell, such as... Figure 6 As shown, in one embodiment, the tapered top support 711 has an elastic buffer layer 712 near one end of the mold sleeve. 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 tapered top support 711. The diameter of the first elastic buffer portion 712a gradually decreases from top to bottom, and the diameter of the second elastic buffer portion 712b gradually increases from top to bottom. 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 tapered top support 711. In this embodiment, the elastic buffer layer 712 is made of elastic materials such as silicone or rubber. The first elastic buffer part 712a and the second elastic buffer part 712b are integrally formed. The diameter of the top of the first elastic buffer part 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 it comes into contact with the battery cell. In this way, when the first elastic buffer part 712a comes into contact with the battery cell, the contact area between the first elastic buffer part 712a and the battery cell is guaranteed. The first elastic buffer part 712a and the second elastic buffer part 712b together play a buffering role, thereby reducing the force of the push rod 710 when it comes into contact with the battery cell, and further avoiding the problem of damage to the separator of the battery cell. Furthermore, the diameter of the first elastic buffer 712a gradually decreases from top to bottom to ensure the contact area between the top of the first elastic buffer 712a and the battery cell. Since the side of the first elastic buffer 712a slopes inward and its maximum diameter is smaller than the maximum diameter of the second elastic buffer 712b, the tab will not contact the side of the first elastic buffer 712a when falling. The diameter of the second elastic buffer 712b gradually increases from top to bottom, and the maximum diameter at the bottom of the second elastic buffer 712b is equal to the minimum diameter at the top of the conical top support 711. This allows the side of the second elastic buffer 712b and the side of the conical top support 711 to form a complete guiding slope. Thus, when the tab at the bottom of the battery cell moves downward, it can slide down along the guiding slope; specifically, the tab slides along the side of the second elastic buffer 712b, further preventing the tab from being bent.

[0053] Furthermore, such as Figure 7 As shown, in one embodiment, the periphery of the first elastic buffer portion 712a is provided with a chamfered structure 7121, which is used to abut against the electrode tab. It is understood that after the battery cell abuts against the bottom wall of the mold, the ejector rod is withdrawn from the mold. When the ejector rod is withdrawn from the mold, there is a risk that the periphery of the first elastic buffer portion 712a will abut against the electrode tab. If the periphery of the first elastic buffer portion 712a is too sharp, it will scratch the electrode tab. In this embodiment, by providing a chamfered structure 7121 on the periphery of the first elastic buffer portion 712a, the chamfered structure 7121 abuts against the electrode tab when the ejector rod is withdrawn from the mold. The contact surface of the chamfered structure 7121 is an arc surface, thus reducing the force exerted when the periphery of the first elastic buffer portion 712a contacts the electrode tab, thereby preventing the electrode tab from being scratched.

[0054] Furthermore, such as Figure 7As shown, in one of the embodiments, the second elastic buffer part 712b is sleeved on the conical top holding part, a smooth elastic connecting surface is arranged at the abutting position of the conical top holding part and the second elastic buffer part 712b, a buffer cavity 7122 is arranged inside the second elastic buffer part 712b, and the buffer cavity 7122 is used to shrink when the battery cell is pressed down, so as to reduce the height of the second elastic buffer part 712b. It can be understood that when the tab is in abutment with the second elastic buffer part 712b and the conical top holding part, the tab slides along the guide slope of the second elastic buffer part 712b and the conical top holding part, avoiding the tab being pressed and folded, that is, the tab will not be pressed and folded to form 90°. However, if the tab falls and first contacts the conical top holding part, the tab will be scratched due to the impact force of the tab falling and the rigid structure of the conical top holding part. In the embodiment, the buffer cavity 7122 is arranged inside the second elastic buffer part 712b, that is, a part of the second elastic buffer part 712b is hollow, and the second elastic buffer part 712b is sleeved on the conical top holding part. When the battery cell is pressed down, the first elastic buffer part 712a transmits the force to the second elastic buffer part 712b, the second elastic buffer part 712b descends along the slope of the conical top holding part, the height of the second elastic buffer part 712b is reduced, and the buffer cavity 7122 inside the second elastic buffer part 712b is compressed, further reducing the height of the second elastic buffer part 712b. Thus, the overall height of the elastic buffer layer is reduced when the battery cell is pressed down, the second elastic buffer part 712b partially overlaps with the conical top holding part 711, the tab is first contacted with the second elastic buffer part 712b, and the rigid collision of the tab with the conical top holding part 711 is avoided, further avoiding the tab being scratched. The smooth elastic connecting surface is arranged at the abutting position of the conical top holding part and the second elastic buffer part 712b. When the battery cell is pressed down, the smooth elastic connecting surface is deformed under the force, and when the ejector rod is withdrawn from the mold sleeve, the smooth elastic connecting surface returns to the original state, so that the second elastic buffer part 712b sleeved on the smooth elastic connecting surface is reset, that is, the second elastic buffer part 712b returns to the initial position, and the rigid collision of the tab with the conical top holding part 711 is further avoided.

[0055] It can be understood that the rotating circular table 615 is rotated to drive the mold sleeve to rotate, and then the tab on the battery cell is rotated to a predetermined position to complete positioning. The rotating circular table 615 abuts against the outer wall of the mold sleeve, and the rotating circular table 615 drives the mold sleeve to rotate by friction. However, since the abutting surface of the rotating circular table 615 and the mold sleeve is a plane, the rotating circular table 615 has low precision in driving the mold sleeve to rotate. Therefore, in order to better drive the mold sleeve to rotate by the rotating circular table 615, the rotating circular table 615 is arranged to be rotatable relative to the mold sleeve, and the rotating circular table 615 is arranged to be rotatable relative to the mold sleeve. Figure 8As shown, in one of the embodiments, the outer periphery of the rotating circular platform 615 is provided with a plurality of spaced rotating protrusions 616, each of the rotating protrusions 616 comprises a first protrusion body 616a and a second protrusion body 616b connected together, the first protrusion body 616a has a first included angle with the horizontal plane, the second protrusion body 616b has a second included angle with the horizontal plane, and the first included angle and the second included angle are complementary angles. In this embodiment, the first protrusion body 616a and the second protrusion body 616b are integrally formed, and the first protrusion body 616a and the second protrusion body 616b can be made of silicone or rubber or other materials with high friction coefficient. The first protrusion body 616a and the second protrusion body 616b form a concave-convex structure on the surface of the rotating circular platform 615, i.e. increase the roughness of the surface of the rotating circular platform 615, so as to increase the friction between the rotating circular platform 615 and the outer wall of the mold sleeve, and thus the rotating circular platform 615 can better drive the mold sleeve to rotate. Further, the first protrusion body 616a and the second protrusion body 616b are both inclinedly arranged on the surface of the rotating circular platform 615, and the first included angle and the second included angle are complementary angles, i.e. the angle at the connection between the first protrusion body 616a and the second protrusion body 616b is 90°, so that the first protrusion body 616a and the second protrusion body 616b form an "arrowhead" shape along the rotating direction, which can guide the first protrusion body 616a and the second protrusion body 616b when they abut against the outer wall of the mold sleeve, so as to better drive the mold sleeve to rotate.

[0056] Compared with the prior art, the present disclosure has at least the following advantages:

[0057] 1. The above-mentioned gasket placing front positioning and fixing device 10, when the mechanical hand puts the battery cell into the accommodating groove 500a of the mold sleeve 500, the first lifting driving member drives the top rod 710 to move upward, so that the end of the top rod 710 abuts against the bottom of the battery cell through the avoiding hole. At this time, the first lifting 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 accommodating groove 500a. In this way, the acting force when the battery cell contacts with the bottom wall of the accommodating groove 500a is reduced, and thus the damage problem of the diaphragm of the battery cell caused by excessive acting force is avoided.

[0058] 2. The positioning and fixing device 10 before the gasket is placed, after the fixing of the battery cell in the mold sleeve 500, the first rotary drive 400 drives the rotary disc 200 to rotate to the tab positioning mechanism 600, at this time the second lifting drive 622 drives the positioning detection member 624 to descend to the predetermined position, the rotary rotating assembly 610 is started to abut with the mold sleeve 500 and makes the mold sleeve 500 rotate, thereby driving the battery cell in the mold sleeve 500 to rotate together, when the tab on the battery cell rotates to be opposite to the positioning detection member 624, the positioning detection member 624 releases the signal to make the rotary rotating assembly 610 stop rotating, thus completing the positioning of the tab, the rotary disc 200 continues to rotate to rotate the battery cell to the gasket placing station, thereby making the tab hole of the gasket accurately pass through the tab in the inserting process, avoiding the tab bending problem caused by the contact between the gasket and the tab.

[0059] The above-described embodiments only express several implementation manners of the present disclosure, and the description is relatively specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be noted that, for ordinary skilled persons in the art, without departing from the concept of the present disclosure, several modifications and improvements can be made, which belong to the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure patent should be subject to the appended claims.

Claims

1. A pre-gasket placing and positioning device, comprising a base plate, a rotating disc, a top plate, a first rotating drive and a plurality of mold sleeves, the first rotating drive is installed on the base plate, the power output end of the first rotating drive is connected with the rotating disc, the top plate is connected with the base plate through a connecting column, the top plate is slidingly connected with the rotating disc, the rotating disc is provided with a plurality of embedded grooves arranged at intervals, the mold sleeves are located in the corresponding embedded grooves, the mold sleeves are provided with accommodating grooves for accommodating battery cells, characterized in that the pre-gasket placing and positioning device further comprises a tab positioning mechanism and a battery cell protection mechanism, the battery cell protection mechanism comprises a first lifting drive and a top rod, the first lifting drive is installed on the base plate, the top rod is connected with the power output end of the first lifting drive, the mold sleeve is provided with an avoiding hole communicating with the accommodating groove, and the top rod is movably arranged in the avoiding hole. The tab positioning mechanism comprises a rotating rotating assembly and a positioning detection assembly, the rotating rotating assembly is installed on the base plate, the rotating rotating assembly is used to drive the mold sleeve to rotate when the mold sleeve abuts against the rotating rotating assembly, the positioning detection assembly comprises a mounting frame, a second lifting drive, a support and a positioning detection piece, the mounting frame is installed on the top plate, the second lifting drive is connected with the mounting frame, the power output end of the second lifting drive is connected with the support, and the positioning detection piece is connected with the support, the positioning detection piece is used to detect the rotating position of the tab of the battery cell, so that the rotating rotating assembly stops rotating when the tab of the battery cell rotates to a predetermined position. An end of the top rod adjacent to the mold sleeve is provided with a tapered top holding part.

2. The pre-positioning fixture of claim 1, wherein, The surface of the tapered top holding part is provided with an electroplated layer.

3. The pre-pad positioning fixture of claim 2, wherein, The number of the positioning detection pieces is two, the two positioning detection pieces are arranged at intervals on the support, and the rotating rotating assembly is used to stop rotating when the tab of the battery cell is rotated to between the two positioning detection pieces.

4. The pre-pad positioning fixture of claim 1, wherein, The rotating rotating assembly comprises a fixed seat, a horizontal drive, a second rotating drive, a connecting plate and a rotating circular table, the fixed seat is installed on the base plate, the horizontal drive is connected with the fixed seat, the power output end of the horizontal drive is connected with the connecting plate, the second rotating drive is installed on the connecting plate, the rotating circular table is connected with the power rotating end of the second rotating drive, and the rotating circular table slidingly abuts against the mold sleeve.

5. The pre-pad positioning fixture of claim 1, wherein, A silica gel sleeve is sleeved on the outer periphery of the rotating circular table.

6. The pre-pad positioning fixture of claim 5, wherein, The fixed seat is provided with a guide rail, the connecting plate is provided with a sliding groove, the guide rail is embedded in the sliding groove, so that the connecting plate slides along the extension direction of the guide rail.

7. The pre-pad positioning fixture of claim 5, wherein, The mold sleeve comprises a sleeve cup and a fixed plate, the fixed plate is connected with the rotating disc, the fixed plate is provided with a sleeve hole, one end of the sleeve cup away from the base plate is sleeved in the sleeve hole, and the accommodating groove and the avoiding hole are both provided in the sleeve cup.

8. The pre-pad positioning fixture of claim 1, wherein, ​ 9. The pre-pad positioning fixture of claim 8, wherein, The mold cover further comprises a screwing part, the fixing plate is provided with a first screwing hole, the rotating disc is provided with a second screwing hole, and the screwing part passes through the first screwing hole and the second screwing hole in sequence, so that the fixing plate is screwed with the rotating disc.

10. The pre-pad positioning fixture of claim 1, wherein, The first lifting driving part is installed on the side of the bottom plate far away from the top plate, the bottom plate is provided with a through hole, and the power output end of the first lifting driving part is connected with the top rod through the through hole.

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