Tab folding device

Abstract

The utility model discloses a tab folding device. The tab folding device comprises a rack, the lower jacking mechanism is mounted on the rack and comprises a lower jacking driving part, a lower mounting frame, a supporting structure and a sliding structure, the supporting structure and the sliding structure are arranged on the lower mounting frame, the supporting structure is used for being driven by the lower jacking driving part to move upwards so as to support the tabs, and the sliding structure is arranged on the side of the supporting structure in the left-right direction and is slidably connected to the lower mounting frame; the centering driving mechanism is mounted on the rack and is used for driving the sliding structure to slide in the left-right direction when the sliding structure moves upwards, so that the sliding structure pushes the battery cell on the supporting structure to be centered; and the upper bending mechanism is mounted on the rack and is used for downwards applying pressure to the centered tab, so that the tab is bent relative to the main body. According to the tab bending device disclosed by the utility model, under the driving of the centering driving mechanism, the sliding structure can center the battery cell, so that the problem that the tab is deformed when being bent is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core manufacturing, in particular to a folding ear device. Background Art

[0002] The battery cell includes a main body and tabs on both sides of the main body. In one production step of the battery, the tabs need to be bent relative to the main body, and the tabs themselves are bent at 90 degrees. However, in existing bending equipment, the battery cell is directly bent after being placed on the bending production line, but the position of the battery cell may not be accurate, resulting in deformation of the tabs during bending. Utility Model Content

[0003] In order to solve at least one problem existing in the above-mentioned prior art, according to one aspect of the utility model, a folding pole ear device is provided, which is used to bend the pole ear of a battery cell, wherein the battery cell comprises a main body and two pole ears arranged at both ends of the main body along the length direction of the main body, and the main body is supported by a fixture, and the folding pole ear device comprises: a frame; a lower lifting mechanism, which is installed on the frame, and comprises a lower lifting drive member, a lower mounting frame, and a support structure and a sliding structure arranged on the lower mounting frame, wherein the support structure is used to move upward to support the pole ear under the drive of the lower lifting drive member, and the sliding structure is arranged on the side of the support structure along the left-right direction and is slidably connected to the lower mounting frame; a centering drive mechanism, which is installed on the frame, and is used to drive the sliding structure to slide along the left-right direction when the sliding structure moves upward, so that the sliding structure pushes the battery cell on the support structure to be centered; an upper bending mechanism, which is installed on the frame, and is used to apply downward pressure to the pole ear after the centering is completed, so that the pole ear is bent relative to the main body.

[0004] In some embodiments, the lower lifting mechanism further includes a base, the base is connected to the lower mounting frame, the supporting structure is connected to the base, and the sliding structure is slidably connected to the base.

[0005] In some embodiments, a positioning groove extending along the left-right direction is formed on the lower mounting frame, and one end of the positioning groove is a closed end and the other end is an open end, and the base is clamped in the positioning groove.

[0006] In some embodiments, the support structure includes a support plate, a first elastic member and a tab support member, the support plate is connected to the base, the first elastic member is connected between the support plate and the tab support member, and the tab support member is used to support the tab.

[0007] In some embodiments, the tab support is T-shaped, including a first support portion and a second support portion, the first support portion correspondingly supports the portion of the tab connected to the main body, and along the left-right direction, the width of the first support portion is greater than the width of the second support portion.

[0008] In some embodiments, the sliding structure includes a slider, a push plate and a second elastic member, the second elastic member is connected between the base and the slider along the left-right direction, the slider is slidably connected to the base, and is used to install the push plate, so that under the drive of the centering drive mechanism, the slider can drive the push plate to move along the left-right direction, so that the push plate can push the center of the battery cell.

[0009] In some embodiments, the sliding structure also includes a roller, which is mounted on the slider and protrudes from the slider along the left and right directions. The centering drive mechanism includes a wedge block, and the wedge block and the roller cooperate to push the push plate to move in the direction of the support structure.

[0010] In some embodiments, the lower lifting mechanism includes two sliding structures, and the two sliding structures are arranged on the left and right sides of the supporting structure along the left-right direction.

[0011] In some embodiments, the upper bending mechanism includes an upper bending drive member, an upper mounting plate, and an upper bending structure disposed on the upper mounting plate, wherein the upper mounting plate is connected between the upper bending drive member and the upper bending structure to drive the upper bending structure to move downward under the drive of the upper bending drive member to bend the pole ear.

[0012] In some embodiments, the upper bending structure includes a mounting block, a bending block, a supporting block and a third elastic member. The mounting block is mounted on the upper mounting plate and is used to mount the bending block and the supporting block. The third elastic member is connected between the mounting block and the supporting block so that under the drive of the upper bending driving member, the supporting block is supported against the jig, and the mounting block drives the bending block to bend the pole ear and compress the third elastic member.

[0013] In summary, the folding ear device provided by the utility model has the following technical effects:

[0014] The fixture drives the battery cell to the predetermined position. When the tab is bent, the support structure can support the tab when the lower lifting mechanism moves upward. At the same time, when the support structure is supported on the tab, the sliding structure can move in the left and right directions under the drive of the centering drive mechanism, thereby pushing the center of the battery cell on the support structure. In this way, after the centering of the battery cell is completed, the upper bending mechanism applies downward pressure to the tab, and at the same time, the tab is bent with the cooperation of the support structure. Since the bending is performed after centering, the problem of deformation of the tab during bending is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a folding ear device according to an embodiment of the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the structure of the fixture and battery cell;

[0017] Figure 3 for Figure 1 A schematic diagram of the structure of the lower lifting mechanism;

[0018] Figure 4 for Figure 3 A three-dimensional schematic diagram of the supporting structure and the sliding structure;

[0019] Figure 5 for Figure 3 Structural schematic diagram of the supporting structure and the sliding structure;

[0020] Figure 6 for Figure 1 A schematic diagram of the structure of the centering drive mechanism;

[0021] Figure 7 for Figure 1 A schematic diagram of the structure of the upper bending mechanism;

[0022] Figure 8 This is a schematic diagram of the structure of the battery cell before the tab is bent;

[0023] Fig. 9 This is a schematic diagram of the structure of the battery cell after the tab is bent.

[0024] Figure: 100-ear folding device, 10-frame, 20-lower lifting mechanism, 21-lower lifting drive member, 22-lower mounting frame, 221-positioning groove, 23-support structure, 231-support plate, 2311-first notch, 2312-first screw hole, 232-first elastic member, 233-ear support member, 2331-first support portion, 2333-second support portion, 24-sliding structure, 241-slider, 242-push plate, 2421-second notch, 2422-second screw hole, 243-second elastic member, 244-roller, 25-base, 251-upper seat, 252- Lower seat, 26-first sensor, 30-upper bending mechanism, 31-upper bending drive member, 32-upper mounting plate, 33-upper bending structure, 331-mounting block, 332-bending block, 333-holding block, 3331-profile groove, 334-third elastic member, 34-second sensor, 40-centering drive mechanism, 41-wedge block, 411-matching inclined plane, 200-battery cell, 210-main body, 220-ear, 222-first section, 223-second section, 300-jig, 310-support rod, 320-support block, 330-erection block, 340-groove, 350-avoidance space. DETAILED DESCRIPTION

[0025] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0027] 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 invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0028] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0029] See also Figures 1 to 9, a pole ear folding device 100 provided in an embodiment of the utility model is used to bend a pole ear 220 of a battery cell 200, wherein the battery cell 200 comprises a main body 210 and two pole ears 220 arranged at both ends of the main body 210 along the length direction of the main body 210, and the main body 210 is supported by a fixture 300, so that the pole ear 220 can be suspended relative to the fixture 300, so as to facilitate bending. The pole ear folding device 100 comprises a frame 10, a fixture 300, a lower lifting mechanism 20, an upper bending mechanism 30 and a centering driving mechanism 40.

[0030] Among them, see Figure 1 , the frame 10 is used as an installation base; the lower lifting mechanism 20 is installed on the frame 10, including a lower lifting drive member 21, a lower mounting frame 22, and a support structure 23 and a sliding structure 24 arranged on the lower mounting frame 22, the support structure 23 is used to move upward under the drive of the lower lifting drive member 21 to support the pole ear 220, the sliding structure 24 is arranged on the side of the support structure 23 along the left and right direction, and is slidably connected to the lower mounting frame 22; the centering drive mechanism 40 is installed on the frame 10, and is used to drive the sliding structure 24 to slide along the left and right direction when the sliding structure 24 moves upward, so that the sliding structure 24 pushes the battery cell 200 on the support structure 23 to be centered; the upper bending mechanism 30 is installed on the frame 10, and is used to apply downward pressure to the pole ear 220 after the centering is completed, so that the pole ear 220 is bent 90° relative to the main body 210.

[0031] In the above-mentioned folding lug device 100, the jig 300 drives the battery cell 200 to a predetermined position. When the lug 220 is bent, when the lower lifting mechanism 20 moves upward, the support structure 23 can support the lug 220. At the same time, when the support structure 23 is supported on the lug 220, the sliding structure 24 can move in the left and right directions under the drive of the centering drive mechanism 40, so as to achieve the centering of the battery cell 200 on the support structure 23. In this way, after the centering of the battery cell 200 is completed, the upper bending mechanism 30 applies pressure to the lug 220 downward, and at the same time, the lug 220 is bent with the cooperation of the support structure 23. Since the bending is performed after the centering, the problem of deformation of the lug 220 during bending is avoided.

[0032] The structure of the tab 220 of the battery cell 200 before being bent is as follows: Figure 1 , Figure 2 and Figure 8 As shown, the structure diagram of the tab 220 after bending is as shown in Fig. 9 As shown, the tab 220 is not only bent 90° relative to the main body 210 , but the tab 220 itself is also bent 90°.

[0033] Specifically, see Figure 2, is a schematic diagram of the structure of the fixture 300 of the present embodiment, comprising two separately arranged support rods 310, multiple pairs of support blocks 320 and multiple mounting blocks 330, the multiple pairs of support blocks 320 are separately arranged on the two support rods 310, one support block 320 in each pair of support blocks 320 is installed on one support rod 310, and one mounting block 330 is installed on each pair of support blocks 320, so that by setting up multiple mounting blocks 330, multiple battery cells 200 can be supported at the same time for bending; there is an avoidance space 350 between the two support rods 310 to allow the lower lifting mechanism 20 to avoid when lifting upward, and each mounting block 330 is provided with a groove 340 so that the main body 210 of the battery cell 200 can be placed in the groove 340. In this way, when the lower lifting mechanism 20 is lifted upward, it passes through the avoidance space 350 between the two support rods 310 , and since the pole ear 220 is in a suspended state, it can be contacted and supported by the lower lifting mechanism 20 .

[0034] It is understandable that in order to enable the battery cell 200 to be quickly placed in and taken out of the groove 340 , the width of the groove 340 is greater than the diameter of the main body 210 of the battery cell 200 . This causes the battery cell 200 to deviate from its position when placed in the groove 340 .

[0035] See also Figures 3 to 5 The lower lifting mechanism 20 of this embodiment also includes a base 25, the base 25 is connected to the lower mounting frame 22, the supporting structure 23 is connected to the base 25, and the sliding structure 24 is slidably connected to the base 25. In this way, by setting the base 25, the supporting structure 23 and the sliding structure 24 can be installed together as a whole through the base 25, and then the whole can be conveniently installed on the lower mounting frame 22, so as to improve the installation efficiency of the entire lower lifting mechanism 20.

[0036] Specifically, see Figure 3 When the base 25 is installed on the mounting plate, a positioning groove 221 extending in the left-right direction is opened on the lower mounting frame 22, and one end of the positioning groove 221 is a closed end and the other end is an open end. The base 25 is clamped in the positioning groove 221. In this way, by pushing the base 25 from the open end of the positioning groove 221, when it touches the closed end, the base 25 cannot be pushed, that is, the installation position of the base 25 is fixed. Therefore, by setting the positioning groove 221, it is convenient to limit the installation position of the base 25, that is, the installation position of the support structure 23 and the sliding structure 24 are simultaneously limited.

[0037] See also Figure 4 The base 25 includes an upper seat 251 and a lower seat 252 that are detachably connected. The upper seat 251 is connected to the sliding structure 24 and the supporting structure 23 , and the lower seat 252 is clamped in the positioning groove 221 .

[0038] See also Figure 1 , Figure 3 and Figure 4 When centering the battery cell 200, in order to ensure the centering effect, the lower lifting mechanism 20 includes two sliding structures 24, and the two sliding structures 24 are arranged on the left and right sides of the support structure 23 along the left and right directions. In this way, by setting two sliding structures 24 to cooperate with the centering drive mechanism 40, one sliding structure 24 can push the battery cell 200 to move to the left under the drive of the centering drive mechanism 40, and the other sliding structure can push the battery cell 200 to move to the right under the drive of the centering drive mechanism 40, thereby achieving the effect of ensuring that the battery cell 200 is centered and avoiding deviation.

[0039] Specifically, see Figures 3 to 5 The support structure 23 includes a support plate 231, a first elastic member 232 and a tab support member 233. The support plate 231 is connected to the base 25. The first elastic member 232 is connected between the support plate 231 and the tab support member 233. The tab support member 233 is used to support the tab 220. When the tab 220 is bent, the upper bending mechanism 30 presses the tab 220 and moves gradually downward. The lower lifting drive member 21 drives the tab support member 233 to move gradually downward. The elastic buffering effect of the first elastic member 232 controls the degree to which the tab 220 is pressed downward, thereby preventing the hard upper bending mechanism 30 from directly colliding with the tab 220 supported by the hard tab support member 233 and causing collision damage.

[0040] Furthermore, in order to ensure that the first elastic member 232 stably supports the tab support member 233, the support structure 23 includes a plurality of first elastic members 232 to prevent the tab support member 233 from shaking when subjected to the pressure of the upper bending mechanism 30. Specifically, the present embodiment includes two first elastic members 232, and the two first elastic members 232 are provided to reduce the cost of the support structure 23, and also facilitate the rapid installation of the support structure 23.

[0041] The tab support 233 in this embodiment is T-shaped, which matches the shape of the tab 220, so as to be able to fully support the lower surface of the tab 220. Specifically, it includes a first support portion 2331 and a second support portion 2333, wherein the first support portion 2331 corresponds to the portion of the tab 220 connected to the main body 210, and along the left-right direction, the width of the first support portion 2331 is greater than the width of the second support portion 2333, so that the first support portion 2331 and the second support portion 2333 of different widths are provided, which can just support the lower surface of the tab 220, so as to ensure the bending effect in the later stage, and avoid deformation of the tab 220 during the bending process.

[0042] It can be understood that the pole ear 220 of this embodiment includes a first section 222 and a second section 223. The first section 222 is connected to the main body 210. Along the left-right direction, the width of the first section 222 is greater than the width of the second section 223. After the pole ear 220 is bent, the positional relationship between the first section 222 and the second section 223 changes from being on the same straight line to an angle of 90° between the two, and the first section 222 is attached to the end face of the main body 210.

[0043] Furthermore, when the support plate 231 and the base 25 are connected, a first notch 2311 is provided on the support plate 231, and a first screw hole 2312 is provided on the support plate 231. The first notch 2311 and the first screw hole 2312 are communicated with each other, so that a bolt can be driven into the first screw hole 2312 under the avoidance of the first notch 2311, thereby realizing the connection between the support plate 231 and the base 25, that is, realizing the connection with the upper seat 251.

[0044] See also Figures 3 to 5 The sliding structure 24 includes a slider 241, a push plate 242 and a second elastic member 243. The second elastic member 243 is connected between the base 25 and the slider 241. The slider 241 is slidably connected to the base 25 and is used to install the push plate 242, so that it can drive the push plate 242 to move in the left and right directions under the drive of the centering drive mechanism 40, so that the centering of the battery cell 200 is pushed by the push plate 242. In this way, when the lower lifting drive member 21 drives the support structure 23 and the sliding structure 24 to rise, when the support structure 23 contacts the pole ear 220, the centering drive mechanism 40 pushes the slider 241 to slide relative to the base 25, compresses the second elastic member 243, and at the same time, the slider 241 drives the push plate 242 to move in the direction of the support structure 23, so that the battery cell 200 can be pushed to the center; when the lower lifting mechanism 20 retreats, under the elastic force of the second elastic member 243, the slider 241 is driven to quickly return to its original position to prepare for the next use.

[0045] It can be understood that since the pushing plate 242 needs to drive the battery cell 200 on the pole ear support 233 on the pushing support plate 231 to move, the height of the pushing plate 242 in the vertical direction in this embodiment is greater than the height of the support plate 231, so that the pushing plate 242 can contact the battery cell 200 to drive the battery cell 200 to move in the center.

[0046] Specifically, when the pushing plate 242 is installed on the slider 241, a second notch 2421 is provided on the pushing plate 242, and a second screw hole 2422 is provided on the pushing plate 242. The second screw hole 2422 is communicated with the second notch 2421, and a corresponding connecting hole is provided on the slider 241. When the pushing plate 242 and the slider 241 are connected, the bolt is driven into the second screw hole 2422 and the connecting hole by avoiding the notch of the second screw hole 2422, thereby realizing the installation of the pushing plate 242 and the slider 241.

[0047] See also Figures 3 to 5 When the centering driving mechanism 40 in this embodiment drives the slider 241 to move, in order to reduce the friction between the centering driving mechanism 40 and the slider 241 during movement, the sliding structure 24 also includes a roller 244, which is mounted on the slider 241 and protrudes from the slider 241 in the left and right directions. The centering driving mechanism 40 includes a wedge block 41, and the wedge block 41 and the roller 244 cooperate to push the push plate 242 to move in the direction of the supporting structure 23. In this way, through the cooperation of the matching inclined surface 411 of the wedge block 41 and the roller 244, The wedge block 41 first contacts the roller 244, and the wedge block 41 gives the roller 244 a pushing force. Since the roller 244 is installed on the slider 241, the slider 241 compresses the second elastic member 243, and also drives the push plate 242 to move, thereby pushing the battery cell 200 to the center; further, since the roller 244 can roll relative to the wedge block 41 when it is pushed, and is in line contact with the wedge block 41, it can reduce the matching friction with the wedge block 41 and improve the centering effect of the battery cell 200.

[0048] Understandably, see Figure 6 The lower lifting mechanism 20 of this embodiment includes two sliding structures 24, so the centering drive mechanism 40 of this embodiment includes two wedge blocks 41, and a wedge block 41 cooperates with a roller 244 in a sliding structure 24 to make the two push plates 242 in the two sliding structures 24 move toward the support plate 231 to achieve the centering of the battery cell 200.

[0049] See also Figure 7 The upper bending mechanism 30 in this embodiment includes an upper bending driving member 31, an upper mounting plate 32 and an upper bending structure 33 arranged on the upper mounting plate 32. The upper mounting plate 32 is connected between the upper bending driving member 31 and the upper bending structure 33, so that under the drive of the upper bending driving member 31, the upper bending structure 33 is driven to move downward to bend the pole ear 220. In this way, the upper bending driving member 31 is driven to drive the upper bending structure 33 to move up and down, so as to realize the bending of the pole ear 220 and the distance between the pole ear 220 and the relative pole ear 220 after the pole ear 220 is bent.

[0050] Specifically, see Figure 7 The upper bending structure 33 includes a mounting block 331, a bending block 332, a holding block 333 and a third elastic member 334. The mounting block 331 is mounted on the upper mounting plate 32 and is used to mount the bending block 332 and the holding block 333. The third elastic member 334 is connected between the mounting block 331 and the holding block 333. When the upper bending driving member 31 is driven, the holding block 333 is held against the fixture 300. The mounting block 331 drives the bending block to bend the tab 220 and the third elastic member 334 is pressed against the tab 220. The upper bending drive member 31 is driven by the supporting block 333 and is held against the surface of the fixture 300 and cannot move downward any further. The bending block 332 continues to move downward under the drive of the upper mounting plate 32, compressing the third elastic member 334 and bending the pole ear 220 at the same time. The setting of the third elastic member 334 can conveniently control the force with which the bending block 332 bends the pole ear 220 downward, thereby having a buffering effect and avoiding damage to the pole ear 220 when bending.

[0051] It can be understood that when the supporting block 333 is against the surface of the jig 300, in order to avoid the battery cell 200, a contoured groove 3331 is provided on the supporting block 333 for the main body 210 of the battery cell 200, so as to match the shape of the main body 210 and avoid the main body 210; in order to achieve accurate bending of the pole ear 220, the shape of the bending block is consistent with the shape of the pole ear 220, that is, both are T-shaped.

[0052] Furthermore, in order to ensure the control of the bending of the pole ear 220, the lower lifting mechanism 20 also includes a first sensor 26, which is used to control the height of the support structure 23 driven by the lower lifting drive 21; the upper bending mechanism 30 also includes a second sensor 34, which is used to control the downward movement distance of the upper bending structure 33 driven by the upper bending drive 31 to ensure the accuracy of the bending of the pole ear 220.

[0053] In addition, it should be noted that the upper bending drive member 31 and the lower lifting drive member 21 in this embodiment can both be driven by a motor, and under the transmission of the screw rod, can respectively realize the downward driving movement and the upward driving movement.

[0054] The use process of the above-mentioned folding ear device 100 is as follows: the lower lifting driving member 21 drives the support structure 23 and the sliding structure 24 to move upward, and while the support structure 23 gradually rises, the sliding structure 24, driven by the centering driving mechanism 40, pushes the battery cell 200 on the support structure 23 to be centered. After the centering of the battery cell 200 is completed, the upper bending structure 33 gradually moves downward under the drive of the upper bending driving member 31, and the abutting block 333 in the upper bending structure 33 abuts on the fixture 300 and cannot continue to move downward. The bending block 332 It gradually moves downward to contact the pole ear 220, and at the same time, the support structure 23 supports the pole ear 220, and also moves downward synchronously with the bending block 332, so that the bending block 332 bends the pole ear 220 90° relative to the main body 210, and the pole ear 220 itself bends 90°; after the bending of the pole ear 220 is completed, the upper bending drive member 31 drives the upper bending structure 33 to move upward and return to its original position, and the lower lifting drive member 21 drives the sliding structure 24 and the support structure 23 to move downward to return to their original position.

[0055] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A tab folding device, used for bending tabs of a battery cell, wherein the battery cell comprises a main body and two tabs arranged at both ends of the main body along the length direction of the main body, and the main body is supported by a fixture, characterized in that: The folding ear device comprises: frame; A lower lifting mechanism is installed on the frame, comprising a lower lifting driving member, a lower mounting frame, and a supporting structure and a sliding structure arranged on the lower mounting frame, wherein the supporting structure is used to move upward to support the pole lug under the drive of the lower lifting driving member, and the sliding structure is arranged on the side of the supporting structure along the left-right direction and is slidably connected to the lower mounting frame; A centering driving mechanism, mounted on the frame, for driving the sliding structure to slide in the left and right directions when the sliding structure moves upward, so that the sliding structure pushes the battery cell on the supporting structure to be centered; The upper bending mechanism is installed on the frame and is used to apply pressure to the tab after centering so that the tab is bent relative to the main body.

2. The folding ear device according to claim 1, characterized in that: The lower lifting mechanism also includes a base, the base is connected to the lower mounting frame, the supporting structure is connected to the base, and the sliding structure is slidably connected to the base.

3. The folding ear device according to claim 2, characterized in that: The lower mounting frame is provided with a positioning groove extending along the left-right direction, and one end of the positioning groove is a closed end and the other end is an open end, and the base is clamped in the positioning groove.

4. The folding ear device according to claim 2 or 3, characterized in that: The support structure includes a support plate, a first elastic member and a tab support member, the support plate is connected to the base, the first elastic member is connected between the support plate and the tab support member, and the tab support member is used to support the tab.

5. The folding ear device according to claim 4, characterized in that: The tab support is T-shaped and includes a first support portion and a second support portion. The first support portion supports the portion of the tab connected to the body. Along the left-right direction, the width of the first support portion is greater than the width of the second support portion.

6. The folding ear device according to claim 2 or 3, characterized in that: The sliding structure includes a slider, a push plate and a second elastic member, wherein the second elastic member is connected between the base and the slider along the left-right direction, and the slider is slidably connected to the base and is used to install the push plate, so that under the drive of the centering drive mechanism, the slider can drive the push plate to move along the left-right direction, so that the push plate can push the center of the battery cell.

7. The folding ear device according to claim 6, characterized in that: The sliding structure also includes a roller, which is installed on the slider and protrudes from the slider along the left and right directions. The centering drive mechanism includes a wedge block, which cooperates with the roller to push the push plate to move in the direction of the supporting structure.

8. The electrode ear folding device according to any one of claims 1 to 3, characterized in that: The lower lifting mechanism includes two sliding structures, and the two sliding structures are arranged on the left and right sides of the supporting structure along the left and right directions.

9. The electrode ear folding device according to any one of claims 1 to 3, characterized in that: The upper bending mechanism includes an upper bending driving member, an upper mounting plate and an upper bending structure arranged on the upper mounting plate. The upper mounting plate is connected between the upper bending driving member and the upper bending structure to drive the upper bending structure to move downward under the drive of the upper bending driving member to bend the pole ear.

10. The folding ear device according to claim 9, characterized in that: The upper bending structure includes a mounting block, a bending block, a supporting block and a third elastic member. The mounting block is mounted on the upper mounting plate and is used to mount the bending block and the supporting block. The third elastic member is connected between the mounting block and the supporting block so that under the drive of the upper bending driving member, the supporting block is supported against the jig, and the mounting block drives the bending block to bend the pole ear and compress the third elastic member.

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