An automatic bending device for battery terminal lugs

Abstract

The present invention discloses an automatic bending device for the tabs of a battery pole group, and relates to the technical field of battery production. The present invention includes a bending mechanism, which includes a frame, the inner wall of the frame is connected to side plates in parallel, and a plurality of bending assemblies are rotatably connected between the two side plates; each bending assembly includes two pairs of bending rods and support rods, and a bending rod and a support rod are arranged in pairs, and the bending rods are connected to a pressure plate; the two bending rods in each bending assembly are connected to a driving mechanism, which is used to drive the pressure plate to bend the tabs through the bending rods, and support the tabs through the support rods; one of the side plates is provided with a first tab avoidance groove, and the other side plate is provided with a second tab avoidance groove adapted to the shape of the tab after bending. The present invention solves the problem of uneven bending of the existing tabs, which affects product quality, by rotating the bending rods in the bending assembly, using the pressure plate to bend the tabs, and supporting the tabs through the support rods.

Description

Technical Field

[0001] The invention belongs to the technical field of battery production, and in particular relates to an automatic bending device for a battery pole group tab. Background Art

[0002] The battery consists of multiple pole groups connected in series. After cast welding, each pole group is pressed and inserted into the corresponding cell in the battery box. In order to achieve the best welding effect and to prevent the welding part from interfering with the battery box during the insertion process, it is usually required to form an inward inclination angle on the two outer pole plates in the pole group during the production process. This process is called the pole ear bending process.

[0003] For example, Chinese utility model CN201721509636.4 discloses a device for shaping the tabs in the battery cast welding process. The first cylinder first drives the shaping plate downward, and each row of tabs is located between the two pieces of a pair of shaping plates. Then the second cylinder drives the shaping plate to move horizontally so that the two pieces of each pair of shaping plates touch the two sides of the tab respectively, completing the tab shaping process.

[0004] However, in the above technical solution, there is no support inside the bent tab of the outermost electrode plate. When the tab is bent directly by the shaping plate, it is easy to cause the root where the tab is connected to the electrode plate body, or even the electrode plate body, to bend, resulting in different bending angles of the tab, resulting in poor subsequent welding accuracy, affecting the overall quality of the product. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic bending device for the tabs of a battery pole group. By rotating the bending rod in the bending assembly, the tabs are bent using a pressure plate, and the tabs are supported by a support rod, thereby solving the problem of uneven bending of the existing tabs, which affects product quality.

[0006] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention provides an automatic bending device for a tab of a battery pole group, comprising a bending mechanism and a battery conveyor line, the bending mechanism spanning above the battery conveyor line; the bending mechanism comprises an "Ω"-shaped frame; the inner wall of the frame is fixedly connected to side plates side by side, and a plurality of bending assemblies are rotatably connected between the two side plates; the side plates are provided with a plurality of avoidance openings; wherein each group of bending assemblies comprises two pairs of bending rods and support rods, and a bending rod and a support rod are arranged in a pair; the bending rods are fixedly connected to a pressure plate; the two bending rods in each group of the bending assemblies are connected to a driving mechanism, and the two bending rods rotate in opposite directions, and are used to bend the tab by the pressure plate through the rotation of the bending rod, and support the tab by the support rod; one of the side plates is provided with a first tab avoidance groove located between the bending rod and the support rod, and the other side plate is provided with a second tab avoidance groove located between the bending rod and the support rod, the second tab avoidance groove being adapted to the shape of the tab after bending.

[0008] As a preferred technical solution of the present invention, the driving mechanism includes two driving rods slidably connected to the side plates, one bending rod in each group of the bending assemblies is transmission-connected to one driving rod, and the other bending rod is transmission-connected to the other driving rod; wherein, the driving rod is fixedly connected to a guide column corresponding to the position of the bending rod; the end of the bending rod is fixedly connected to a shift rod, and the shift rod is provided with a straight slot that matches the gap with the guide column, which is used to move along the length direction through the driving rod, and drive the bending rod to rotate through the shift rod.

[0009] As a preferred technical solution of the present invention, one end of the two driving rods is fixedly connected to a rack, and the two racks are arranged opposite to each other; the outer wall of the frame is fixedly connected to a driving device, and the driving device is connected to a driving wheel that engages with the two racks at the same time, and the two driving rods are driven to move along the length direction by rotating the driving wheel, and the movement directions of the two driving rods are opposite.

[0010] As a preferred technical solution of the present invention, telescopic devices are fixedly connected to both sides of the frame, and the telescopic devices are connected to baffles, which are used to drive the baffles to move into the frame through the telescopic devices to locate the battery position.

[0011] As a preferred technical solution of the present invention, the telescopic end of the telescopic device is fixedly connected to a guide rod, the end of the guide rod is fixedly connected to an extrusion block, the circumferential surface of the guide rod is provided with a spring, and is fixedly connected to a retaining ring; the side of the baffle is fixedly connected to an ear plate connected to the guide rod, which is used to move the guide rod and utilize the spring to squeeze the ear plate to drive the baffle to move, and the battery is clamped by the extrusion block passing through the side wall of the frame.

[0012] As a preferred technical solution of the present invention, the extrusion block is a rubber block.

[0013] As a preferred technical solution of the present invention, the baffle is slidably connected to the frame.

[0014] As a preferred technical solution of the present invention, the retaining ring and the guide rod are connected by a threaded connection for adjusting the axial position of the retaining ring.

[0015] As a preferred technical solution of the present invention, the rack is fixedly connected to the mounting rack of the battery conveyor line.

[0016] The present invention has the following beneficial effects:

[0017] 1. The present invention connects multiple groups of bending components through a frame. The two bending rods in each group of bending components rotate in opposite directions. The bending rods are used to rotate, and the pole ears are bent by using a pressure plate, and the pole ears are supported by a support rod. This avoids the bending of the roots of the pole ears connected to the electrode plate body, or even the electrode plate body, when the pole ears are bent, thereby making the bending angles of the pole ears uniform, effectively improving the subsequent welding accuracy and the overall product quality.

[0018] 2. The present invention transports the batteries into the rack through the battery conveyor line, and the tabs pass through the avoidance port and the first tab avoidance groove, the bent tabs pass through the second tab avoidance groove, and the unbent tabs still pass through the avoidance port, so that during the tab bending process, only the batteries need to be transported and the bending rod needs to be rotated, which effectively improves the bending efficiency of the tabs.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 Schematic diagram of the structure of an automatic bending device for a battery electrode group according to the present invention;

[0022] Figure 2 It is a structural diagram of the bending mechanism;

[0023] Figure 3 for Figure 2 Schematic diagram of the structure from the rear view perspective;

[0024] Figure 4 for Figure 2 The main view of the structure;

[0025] Figure 5 for Figure 4 A top view of the structure;

[0026] Figure 6 for Figure 4 Schematic diagram of the structure from an upward perspective;

[0027] Figure 7 for Figure 5 Cross-sectional view at AA in the middle;

[0028] Figure 8 for Figure 4 A schematic diagram of the structure of the middle part B;

[0029] Figure 9 for Figure 6 A magnified schematic diagram of the structure of the middle C section;

[0030] Figure 10 for Figure 7 A schematic diagram of the structure of the middle D part;

[0031] Figure 11 It is a structural diagram of the tab when it is bent;

[0032] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0033] 1-bending mechanism, 2-bending rod, 3-support rod, 4-driving rod, 5-driving device, 6-telescopic device, 7-battery, 11-battery conveyor line, 101-frame, 102-side plate, 103-avoidance, 104-first tab avoidance groove, 201-pressing plate, 202-shift rod, 203-straight slot, 401-guide column, 402-rack, 501-driving wheel, 601-baffle, 602-guide rod, 603-extrusion block, 604-spring, 605-retaining ring, 606-ear plate, 701-tab. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] Example 1

[0037] See also Figure 1 As shown, the present invention is an automatic tab bending device for battery electrode groups, comprising a bending mechanism 1 and a battery conveyor line 11. The bending mechanism 1 spans over the battery conveyor line 11, which is used to convey batteries, and the batteries are placed horizontally. The frame 101 is connected to the mounting frame of the battery conveyor line 11 by screws, but can also be installed and fixed using a separate bracket.

[0038] like Figures 2 to 5 As shown, the bending mechanism 1 includes an "Ω"-shaped frame 101; side panels 102 are welded side by side on the inner wall of the frame 101, and four sets of bending components are rotatably connected between the two side panels 102; the side panels 102 are provided with a plurality of avoidance openings 103, and the avoidance openings 103 correspond to the positions of the battery tabs that are not bent.

[0039] like Figures 6-10 As shown, each bending assembly includes two pairs of bending rods 2 and support rods 3, and one bending rod 2 and one support rod 3 are arranged in pairs, that is, each bending assembly includes two bending rods 2 and two support rods 3, and one bending rod 2 and one support rod 3 are paired in pairs. The bending rod 2 is welded with a pressure plate 201, which is located on the upper side of the bending rod 2.

[0040] The two bending rods 2 in each bending assembly are connected to the driving mechanism, and the two bending rods 2 rotate in opposite directions. The bending rods 2 are used to rotate, use the pressure plate 201 to bend the tab, and support the tab through the support rod 3.

[0041] In addition, one of the side panels 102 is provided with a first tab avoidance groove 104 located between the bending rod 2 and the support rod 3, and the other side panel 102 is provided with a second tab avoidance groove 105 located between the bending rod 2 and the support rod 3, and the second tab avoidance groove 105 is adapted to the shape of the tab after bending.

[0042] Specifically, such as Figure 9As shown, the drive mechanism includes two drive rods 4 slidably connected to the side plates 102. The drive rods 4 are connected to the side plates 102 via slide rails, and the two drive rods 4 are arranged side by side. In each bending assembly, one bending rod 2 is connected to one drive rod 4, and the other bending rod 2 is connected to the other drive rod 4.

[0043] Among them, the driving rod 4 is fixedly connected to a guide column 401 corresponding to the position of the bending rod 2, a shift rod 202 is welded to the end of the bending rod 2, and the shift rod 202 is provided with a straight slot 203 that is clearance-matched with the guide column 401, which is used to move along the length direction through the driving rod 4 and drive the bending rod 2 to rotate through the shift rod 202.

[0044] At the same time, one end of the two driving rods 4 is welded or screwed to a rack 402, and the two racks 402 are arranged opposite to each other. The outer wall of the frame 101 is connected to a driving device 5 through a motor bracket. The driving device 5 can be a motor. The driving device 5 is connected to a driving wheel 501 that engages with the two racks 402 at the same time. The two driving rods 4 are driven to move along the length direction by rotating the driving wheel 501, and the movement directions of the two driving rods 4 are opposite.

[0045] like Figures 9-10 As shown, the battery conveyor line 11 drives the battery 7 to move and convey it into the rack 1 , and the tabs 701 of the battery 7 enter the rack 1 through the avoidance opening 103 and the first tab avoidance groove 104 .

[0046] During bending, the driving device 5 drives the driving wheel 501 to rotate, so that the two driving rods 4 move in opposite directions, and drive the corresponding guide pillars 401 to move the lever 202, thereby driving the corresponding bending rod 2 to rotate.

[0047] like Figure 11 As shown, the two bending rods 2 in each group rotate in opposite directions, and the bending rod 2 drives the pressure plate 201, so that the upper end of the pole ear 701 is squeezed and bent by the pressure plate 201, and during the bending process, the root of the pole ear 701 is supported by the support rod 3, thereby realizing the bending of the pole ear 701.

[0048] In addition, the bending rods 2 with the same rotation direction are driven by the same driving rod 4, and the two driving rods 4 are driven by an active wheel 501, so that the two driving rods 4 move the same distance, thereby making the rotation angle of the bending rod 2 uniform, and the pole ear 701 is supported by the support rod 3, avoiding the bending of the root of the pole ear 701 connected to the pole plate body, or even the electrode plate body, so that the bending angle of the pole ear 701 is uniform, effectively improving the overall quality of the product.

[0049] After bending, the battery conveyor line 11 drives the battery 7 to move, and the bent tab 701 passes through the second tab avoidance groove 105, while the unbent tab 701 still passes through the avoidance opening 103, so that the battery 7 can be smoothly moved out of the rack 101.

[0050] Example 2

[0051] Based on the first embodiment, a telescopic device 6, which can be a pneumatic cylinder, is fixedly connected to both sides of the frame 101. A baffle 601 is connected to the telescopic device 6, which is used to move the baffle 601 into the frame 101 to position the battery. A sliding connection between the baffle 601 and the frame 101 improves the stability of the baffle 601's movement.

[0052] When the battery enters the rack 101 , the telescopic device 6 drives the baffle 601 to extend into the rack 101 , thereby limiting the position of the battery and ensuring that the battery is located at the tab bending position in the rack 101 .

[0053] At the same time, the telescopic end of the telescopic device 6 is welded or screwed to a guide rod 602, the end of the guide rod 602 is screwed to an extrusion block 603, the circumferential surface of the guide rod 602 is sleeved with a spring 604, and is fixedly connected to a retaining ring 605.

[0054] An ear plate 606 connected to the guide rod 602 is welded to the side of the baffle 601, which is used to move the baffle 601 by squeezing the ear plate 606 through the spring 604 when the guide rod 602 moves. When the baffles 601 on both sides of the rack 101 move to the point where they cannot move inside the rack 101, the guide rod 602 continues to move and squeezes the spring 604 through the retaining ring 605, so that the baffle 601 remains in a fixed position.

[0055] A through slot is provided on the side of the rack 101. When the guide rod 602 continues to move, it drives the extrusion block 603 to pass through the side wall of the rack 101 through the through slot, thereby clamping the battery through the extrusion blocks 603 on both sides, further improving the fixing effect of the battery and the accuracy of the position.

[0056] The extrusion block 603 is a rubber block that prevents damage to the battery housing. Meanwhile, the retaining ring 605 is threadedly connected to the guide rod 602 to adjust the axial position of the retaining ring 605, allowing the spring 604 to abut against the lug 606, thereby increasing the response speed of the retaining plate 601 when the guide rod 602 moves.

[0057] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0058] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic bending device for a battery terminal group tab, characterized in that: It comprises a bending mechanism (1) and a battery conveying line (11), wherein the bending mechanism (1) spans above the battery conveying line (11); The bending mechanism (1) comprises an "Ω"-shaped frame (101); the inner wall of the frame (101) is fixedly connected to side panels (102) in parallel, and a plurality of bending components are rotatably connected between the two side panels (102); the side panels (102) are provided with a plurality of avoidance openings (103); Each bending assembly comprises two pairs of bending rods (2) and support rods (3), and one bending rod (2) and one support rod (3) are arranged in pairs; the bending rod (2) is fixedly connected to a pressure plate (201); The two bending rods (2) in each group of the bending assembly are connected to the driving mechanism, and the two bending rods (2) rotate in opposite directions, and are used to bend the tabs by using the pressing plate (201) through the rotation of the bending rods (2), and support the tabs by using the support rods (3); One of the side plates (102) is provided with a first tab avoidance groove (104) located between the bending rod (2) and the support rod (3), and the other side plate (102) is provided with a second tab avoidance groove (105) located between the bending rod (2) and the support rod (3), wherein the second tab avoidance groove (105) is adapted to the shape of the tab after bending; The driving mechanism comprises two driving rods (4) slidably connected to the side plates (102), one bending rod (2) in each group of the bending components is transmission-connected to one driving rod (4), and the other bending rod (2) is transmission-connected to the other driving rod (4); The driving rod (4) is fixedly connected to a guide post (401) corresponding to the position of the bending rod (2); the end of the bending rod (2) is fixedly connected to a shifting rod (202), and the shifting rod (202) is provided with a straight slot (203) that is clearance-matched with the guide post (401), and is used to move along the length direction through the driving rod (4) and drive the bending rod (2) to rotate through the shifting rod (202); One end of each of the two driving rods (4) is fixedly connected to a rack (402), and the two racks (402) are arranged opposite to each other; the outer wall of the frame (101) is fixedly connected to a driving device (5), and the driving device (5) is connected to a driving wheel (501) that is simultaneously engaged with the two racks (402), and the two driving rods (4) are driven to move along the length direction by the rotation of the driving wheel (501), and the movement directions of the two driving rods (4) are opposite.

2. The automatic bending device for tabs of a battery electrode group according to claim 1, characterized in that: Both sides of the frame (101) are fixedly connected with telescopic devices (6), and the telescopic devices (6) are connected with baffles (601) for driving the baffles (601) to move into the frame (101) via the telescopic devices (6) to locate the battery.

3. The automatic bending device for tabs of a battery electrode group according to claim 2, characterized in that: The telescopic end of the telescopic device (6) is fixedly connected to a guide rod (602), the end of the guide rod (602) is fixedly connected to an extrusion block (603), the circumferential surface of the guide rod (602) is sleeved with a spring (604), and is fixedly connected to a retaining ring (605); The side of the baffle (601) is fixedly connected to an ear plate (606) connected to the guide rod (602), which is used to move the guide rod (602) to squeeze the ear plate (606) using the spring (604) to drive the baffle (601) to move, and to clamp the battery through the side wall of the frame (101) through the squeezing block (603).

4. The automatic bending device for tabs of a battery electrode group according to claim 3, characterized in that: The extrusion block (603) is a rubber block.

5. The automatic bending device for tabs of a battery electrode group according to claim 3 or 4, characterized in that: The baffle (601) is slidably connected to the frame (101).

6. The automatic bending device for tabs of a battery electrode group according to claim 3, characterized in that: The retaining ring (605) and the guide rod (602) are connected via a threaded connection, which is used to adjust the axial position of the retaining ring (605).

7. The automatic bending device for tabs of a battery electrode group according to claim 1, characterized in that: The frame (101) is fixedly connected to the mounting frame of the battery conveyor line (11).

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