Tab straightening device and lithium battery welding equipment

Abstract

The utility model relates to the technical field of lithium battery welding equipment, and discloses a pole lug straightening device and lithium battery welding equipment, which comprise a mounting seat, a pole lug straightening device and a pole lug straightening device, the driving part is assembled on the mounting station; the movable seat is in transmission connection with the driving part, the movable seat is provided with a working position close to the tab and an initial position far away from the tab in the moving stroke, and the driving part drives the movable seat to move between the working position and the initial position; the shaping roller is assembled on the movable seat, and the shaping roller is used for straightening the tabs in the process that the movable seat moves from the working position to the initial position; and the air blowing assembly is assembled on the movable seat, the air blowing assembly is provided with a plurality of air blowing holes, and the air blowing holes are used for blowing air towards the tabs. The shaping roller and the blowing assembly are assembled on the movable seat at the same time, and the blowing assembly and the shaping roller are matched to shape the tabs twice in different states, so that the tabs are prevented from being folded and inserted inwards, and the straightening effect of the tabs, the ultrasonic final welding effect and the safety performance of a battery cell are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery welding equipment, in particular to a tab straightening device and lithium battery welding equipment. Background Art

[0002] With the rapid development and application of electric vehicles and the increasing requirements for energy conservation and environmental protection around the world, the demand for key components in the electric vehicle industry, automotive battery cell assemblies, is also increasing. At present, as the quality system control of various battery cell manufacturers is becoming more and more perfect, the production requirements of battery cells are getting higher and higher.

[0003] The current lithium battery ultrasonic pre-welding process requires welding the cell's tabs to the adapter on the shell. When the cell is loaded onto the ring track fixture, the tabs at the bottom of the cell will be folded, causing the tabs to be seriously inserted. The existing pre-welding equipment lacks a tab smoothing device, and the risk of tab folding and insertion leads to insufficient pre-welding layers of the cell's tabs, affecting the ultrasonic final welding effect and the safety performance of the cell. Utility Model Content

[0004] The purpose of the utility model is to provide a tab straightening device to solve the problem in the prior art that the tabs of a battery cell are folded and inserted during pre-welding, which affects the ultrasonic welding effect and the safety performance of the battery cell; the utility model also provides a lithium battery welding device using the tab straightening device.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a tab straightening device, comprising:

[0006] A mounting seat, wherein the mounting seat has a mounting station;

[0007] A driving member, the driving member being assembled at the installation station;

[0008] A movable seat, the movable seat is in driving connection with the driving member, the movable seat has a working position close to the pole ear and an initial position away from the pole ear in the moving stroke, and the driving member drives the movable seat to move between the working position and the initial position;

[0009] A shaping roller, which is mounted on the movable seat and is used to straighten the pole ear when the movable seat moves from the working position to the initial position;

[0010] A blowing assembly is assembled on the movable seat, and the blowing assembly has a plurality of blowing holes, and the blowing holes are used for blowing toward the tabs.

[0011] Preferably, the shaping roller comprises a connecting rod and a rolling sleeve, the connecting rod is assembled on the movable seat, and the rolling sleeve is coaxially sleeved on the connecting rod.

[0012] Preferably, the movable seat has a plurality of first assembly holes, each of which is arranged at intervals along the direction from the working position to the initial position of the movable seat, and the connecting rod is assembled in the first assembly hole.

[0013] Preferably, the movable seat has a plurality of second assembly holes, and the second assembly holes are arranged at intervals along the direction from the working position to the initial position of the movable seat, and the blowing assembly is assembled in the second assembly holes.

[0014] Preferably, the blowing assembly includes a blowing plate and a mounting plate, the blowing hole is opened in the blowing plate, the mounting plate is fixedly assembled on the second assembly hole, the blowing plate is rotatably assembled on the mounting plate, and the rotation axis of the blowing plate is parallel to the center line of the shaping roller.

[0015] Preferably, the blowing plate further comprises a blowing channel and an air inlet, the blowing holes and the air inlet are both connected to the blowing channel, and the blowing holes are spaced apart and distributed along the rotation axis direction of the blowing plate.

[0016] Preferably, the movable seat includes a first connecting plate and a second connecting plate, the first connecting plate is transmission-connected to the driving member, the first connecting plate has at least two connecting stations, each of the connecting stations is arranged at intervals along the direction from the working position to the initial position of the movable seat, the second connecting plate is assembled at the connecting station, and the shaping roller and the blowing assembly are both assembled on the second connecting plate.

[0017] Preferably, the second connecting plate includes a connecting arm and a fixed arm connected to the connecting arm, the connecting arm is assembled at the connecting station, there are two groups of fixed arms, the two groups of fixed arms form a U-shaped structure with the connecting arm, the shaping roller is assembled between the two groups of fixed arms, and the blowing assembly is assembled on one of the fixed arms.

[0018] Preferably, the driving member comprises a slide cylinder, and the movable seat is fixedly assembled with a piston rod of the slide cylinder.

[0019] The utility model also provides a lithium battery welding device, comprising the tab straightening device described in any one of the above technical solutions.

[0020] Compared with the prior art, the advantageous effects of the tab straightening device and lithium battery welding equipment of the utility model embodiment are as follows: a shaping roller and a blowing assembly are simultaneously assembled on the movable seat; when the battery cell is grabbed above the discharge position, the driving member drives the movable seat to move from the initial position to the working position; the blowing assembly blows air to the tab through the blowing hole to prevent the tab from folding to the root of the battery cell during the discharge process of the battery cell; after the battery cell moves to the discharge position, the driving member drives the movable seat to move from the working position to the initial position; the shaping roller adheres to the bottom of the tab and shapes the tab; the blowing assembly cooperates with the shaping roller to shape the tab twice in total under different conditions to avoid folding and inset of the tab, thereby ensuring the straightening effect of the tab, the ultrasonic final welding effect and the safety performance of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the tab straightening device of the utility model;

[0022] Figure 2 yes Figure 1 Schematic diagram of the explosion of the lug straightening device.

[0023] In the figure, 1. mounting seat, 11. mounting station, 2. driving member, 21. slide cylinder, 22. piston rod, 3. movable seat, 31. first assembly hole, 32. second assembly hole, 33. first connecting plate, 331. connecting station, 34. second connecting plate, 341. connecting arm, 342. fixed arm, 4. shaping roller, 41. connecting rod, 42. rolling sleeve, 5. blowing assembly, 51. blowing hole, 52. blowing plate, 521. blowing channel, 522. air inlet, 53. mounting plate. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] A preferred embodiment of a tab straightening device of the utility model is as follows: Figure 1 and Figure 2 As shown, the tab straightening device includes a mounting seat 1, a driving member 2, a movable seat 3, a shaping roller 4 and a blowing assembly 5.

[0026] The mounting base 1 is used to be assembled on the lithium battery welding equipment. In the present embodiment, the mounting base 1 is an L-shaped metal part. The mounting base 1 is fixedly connected to the lithium battery welding equipment by bolts. The assembly height of the entire pole ear straightening device can be adjusted by adjusting the installation height of the mounting base 1, which is suitable for welding operations of battery cell pole ears of different specifications and sizes.

[0027] The mounting seat 1 has an installation station 11, and the driving member 2 is assembled on the installation station 11. In this embodiment, the installation station 11 is located at the top of the mounting seat 1, and the installation station 11 is specifically four bolt holes distributed in a rectangular shape, and the driving member 2 is fixedly assembled on the mounting seat 1 by bolts.

[0028] The movable seat 3 is in transmission connection with the driving member 2, and the driving member 2 is used to drive the movable seat 3 to move horizontally to adjust the distance between the movable seat 3 and the pole ear to be straightened. In the horizontal movement stroke, the movable seat 3 has a working position close to the pole ear and an initial position away from the pole ear, that is, the working position and the initial position are the positions when the movable seat 3 is at the two ends of the movement stroke, and the driving member 2 can drive the movable seat 3 to move back and forth between the working position and the initial position.

[0029] The shaping roller 4 is assembled on the movable seat 3 and can rotate on the movable seat 3. When the movable seat 3 is located at the working position, the shaping roller 4 is located at the lower side of the root of the pole ear. In the process of the movable seat 3 moving from the working position to the initial position, the shaping roller 4 fits the lower side of the pole ear and moves from the root of the pole ear to the end of the pole ear and finally separates from the pole ear. At this time, the shaping roller 4 can shape the pole ear to prevent the pole ear from folding and inserting toward the bottom of the battery cell.

[0030] The blowing assembly 5 is assembled on the movable seat 3. When the movable seat 3 moves to the working position, the blowing assembly 5 is located at the lower side of the pole ear. The blowing assembly 5 has a plurality of blowing holes 51, and the blowing holes 51 are used to blow air toward the pole ear. When the battery cell feeding mechanism moves from top to bottom and grabs the pole ear to the discharge position, the blowing assembly 5 can blow air toward the pole ear from bottom to top through the blowing holes 51 to prevent the pole ear from folding to the root of the battery cell during the movement of the battery cell.

[0031] The tab straightening device is equipped with a shaping roller 4 and a blowing assembly 5 on a movable seat 3. When the battery cell is grabbed above the discharge position, the driving member 2 drives the movable seat 3 to move from the initial position to the working position, and the blowing assembly 5 blows air to the tab through the blowing hole 51 to prevent the tab from folding to the root of the battery cell during the discharge process of the battery cell. After the battery cell moves to the discharge position, the driving member 2 drives the movable seat 3 to move from the working position to the initial position, and the shaping roller 4 is attached to the bottom of the tab and shapes the tab. The blowing assembly 5 cooperates with the shaping roller 4 to shape the tab twice in different states to avoid folding and inset of the tab, thereby ensuring the straightening effect of the tab, the ultrasonic final welding effect and the safety performance of the battery cell.

[0032] Preferably, the shaping roller 4 includes a connecting rod 41 and a rolling sleeve 42 . The connecting rod 41 is assembled on the movable seat 3 , and the rolling sleeve 42 is coaxially sleeved on the connecting rod 41 .

[0033] The shaping roller 4 is formed by a connecting rod 41 and a rolling sleeve 42. When the movable seat 3 moves from the working position to the initial position, the movable sleeve fits with the pole ear and rotates on the connecting rod 41. There is rolling friction between the pole ear and the movable sleeve, which ensures that the pole ear is shaped while reducing the movement resistance of the movable seat 3 and avoiding damage to the pole ear.

[0034] Preferably, the movable seat 3 has a plurality of first assembly holes 31 , and the first assembly holes 31 are arranged at intervals along the direction from the working position to the initial position of the movable seat 3 , and the connecting rod 41 is assembled in the first assembly hole 31 .

[0035] Since the first assembly holes 31 are arranged at intervals along the direction from the working position to the initial position of the movable seat 3, the distances between the first assembly holes 31 and the roots of the tabs are different. When the specifications of the battery cells are different and the positions of the tabs change, the connecting rods 41 can be assembled in different first assembly holes 31, which is suitable for shaping the tabs of battery cells of different specifications.

[0036] Preferably, the movable seat 3 has a plurality of second assembly holes 32 , and the second assembly holes 32 are arranged at intervals along the direction from the working position to the initial position of the movable seat 3 , and the blowing assembly 5 is assembled in the second assembly hole 32 .

[0037] Since the second assembly holes 32 are arranged at intervals along the direction from the working position to the initial position of the movable seat 3, the distances between the second assembly holes 32 and the roots of the tabs are different. When the specifications of the battery cells are different and the positions of the tabs change, the blowing assembly 5 can be assembled in different second assembly holes 32, and air can be blown toward the tabs of the battery cells of different specifications.

[0038] Preferably, the blowing assembly 5 includes a blowing plate 52 and a mounting plate 53, the blowing hole 51 is opened in the blowing plate 52, the mounting plate 53 is fixedly assembled in the second assembly hole 32, the blowing plate 52 is rotatably assembled on the mounting plate 53, and the rotation axis of the blowing plate 52 is parallel to the center line of the shaping roller 4.

[0039] The blowing plate 52 of the blowing assembly 5 is rotatably assembled on the mounting plate 53. When the position of the pole ear changes so that the angle between the blowing plate 52 and the pole ear becomes different, the blowing plate 52 can rotate around the rotation axis to change the direction of the blowing hole 51 so that the blowing hole 51 blows toward the pole ear. It has wide applicability and good blowing shaping effect.

[0040] Preferably, the air blowing plate 52 further has an air blowing channel 521 and an air inlet 522 . The air blowing holes 51 and the air inlet 522 are both connected to the air blowing channel 521 . The air blowing holes 51 are spaced apart along the rotation axis direction of the air blowing plate 52 .

[0041] The blowing channel 521 on the blowing plate 52 is connected to each blowing hole 51, and air is introduced into the blowing channel 521 through the air inlet 522 so that each blowing hole 51 blows air toward the tab, thereby simplifying the structure of the blowing plate 52. In this embodiment, the blowing plate 52 is connected to an air pipe joint, and the interface of the air pipe joint forms the air inlet 522.

[0042] Preferably, the movable seat 3 includes a first connecting plate 33 and a second connecting plate 34. The first connecting plate 33 is transmission-connected to the driving member 2. The first connecting plate 33 has at least two connecting stations 331. Each connecting station 331 is arranged at intervals along the direction from the working position to the initial position of the movable seat 3. The second connecting plate 34 is assembled on the connecting station 331. The shaping roller 4 and the blowing assembly 5 are both assembled on the second connecting plate 34.

[0043] At least two connection stations 331 are arranged at intervals on the first connection plate 33 of the movable seat 3 in the direction from the working position to the initial position of the movable seat 3, so that the distances between each connection station 331 and the battery cell are different. When the specifications of the battery cell are different, the second connection plate 34 can select the corresponding connection station 331 to be assembled with the first connection plate 33, and the positions of the shaping roller 4 and the blowing assembly 5 are adjusted as a whole, which has good applicability. In this embodiment, the connection station 331 is specifically a bolt hole arranged in pairs.

[0044] Preferably, the second connecting plate 34 includes a connecting arm 341 and a fixed arm 342 connected to the connecting arm 341, the connecting arm 341 is assembled on the connecting station 331, there are two groups of fixed arms 342, the two groups of fixed arms 342 and the connecting arm 341 form a U-shaped structure, the shaping roller 4 is assembled between the two groups of fixed arms 342, and the blowing assembly 5 is assembled on one of the fixed arms 342.

[0045] The connecting arm 341 and the fixed arm 342 of the second connecting plate 34 form a U-shaped structure. The second connecting plate 34 is lightweight. At the same time, the blowing component 5 can also select one of the fixed arms 342 for assembly as needed, and the other fixed arm 342 serves as a backup for the blowing component 5.

[0046] Preferably, the driving member 2 comprises a slide cylinder 21 , and the movable seat 3 is fixedly assembled with a piston rod 22 of the slide cylinder 21 .

[0047] The driving member 2 is formed by a slide cylinder 21 , which has good precision and a large working stroke, and is convenient for accurately controlling the moving position of the movable seat 3 .

[0048] The working process of the utility model is as follows: the battery cell feeding mechanism grabs the battery cell to the top of the discharge position, and the driving member 2 drives the movable seat 3 to move from the initial position to the working position. At this time, the air inlet 522 of the blowing plate 52 takes in air, and the blowing hole 51 blows air upward; the battery cell feeding mechanism moves downward to the discharge position. During the movement, the blowing hole 51 always blows air to the head of the pole ear to prevent the pole ear from folding to the root of the battery cell during this process; after the battery cell feeding mechanism moves to the discharge position, the driving member 2 retracts and drives the movable seat 3 to move to the initial position. During this process, the rolling sleeve 42 of the shaping roller 4 always fits the lower side of the pole ear, rotates the rolling sleeve 42 on the connecting rod 41 and reshapes the pole ear once, and the air inlet 522 of the blowing plate 52 stops taking in air; the battery cell feeding mechanism completes the discharge and moves to the top of the discharge position to perform the next operation.

[0049] The utility model also provides an embodiment of a lithium battery welding device, including a tab straightening device. The specific structure of the tab straightening device is the same as the specific structure of the tab straightening device in any of the above embodiments, and will not be repeated here.

[0050] In summary, the embodiments of the utility model provide a tab straightening device and a lithium battery welding device, which are simultaneously equipped with a shaping roller and a blowing assembly on a movable seat. When the battery cell is grabbed above the discharge position, the driving member drives the movable seat to move from the initial position to the working position, and the blowing assembly blows air to the tab through the blowing hole to prevent the tab from folding to the root of the battery cell during the discharge process of the battery cell. After the battery cell moves to the discharge position, the driving member drives the movable seat to move from the working position to the initial position, and the shaping roller fits the bottom of the tab and shapes the tab. The blowing assembly and the shaping roller cooperate to shape the tab twice in different states to avoid folding and inset of the tab, thereby ensuring the straightening effect of the tab, the ultrasonic final welding effect and the safety performance of the battery cell.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A tab straightening device, characterized in that: include: A mounting seat (1), wherein the mounting seat (1) has a mounting station (11); A driving member (2), wherein the driving member (2) is assembled at the installation station (11); A movable seat (3), the movable seat (3) being in driving connection with the driving member (2), the movable seat (3) having a working position close to the pole lug and an initial position away from the pole lug during a moving stroke, and the driving member (2) drives the movable seat (3) to move between the working position and the initial position; A shaping roller (4), the shaping roller (4) being mounted on the movable seat (3), and the shaping roller (4) being used for straightening the pole ear when the movable seat (3) moves from the working position to the initial position; A blowing assembly (5), wherein the blowing assembly (5) is assembled on the movable seat (3), and the blowing assembly (5) has a plurality of blowing holes (51), and the blowing holes (51) are used to blow air toward the tabs.

2. The tab straightening device according to claim 1, characterized in that: The shaping roller (4) comprises a connecting rod (41) and a rolling sleeve (42); the connecting rod (41) is assembled on the movable seat (3); and the rolling sleeve (42) is coaxially sleeved on the connecting rod (41).

3. The tab straightening device according to claim 2, characterized in that: The movable seat (3) has a plurality of first assembly holes (31), each of the first assembly holes (31) is arranged at intervals along the direction from the working position to the initial position of the movable seat (3), and the connecting rod (41) is assembled in the first assembly hole (31).

4. The tab straightening device according to any one of claims 1 to 3, characterized in that: The movable seat (3) has a plurality of second assembly holes (32), each of the second assembly holes (32) being arranged at intervals along the direction from the working position to the initial position of the movable seat (3), and the blowing assembly (5) is assembled in the second assembly hole (32).

5. The tab straightening device according to claim 4, characterized in that: The blowing assembly (5) comprises a blowing plate (52) and a mounting plate (53), the blowing hole (51) is opened in the blowing plate (52), the mounting plate (53) is fixedly mounted on the second mounting hole (32), the blowing plate (52) is rotatably mounted on the mounting plate (53), and the rotation axis of the blowing plate (52) is parallel to the center line of the shaping roller (4).

6. The tab straightening device according to claim 5, characterized in that: The blowing plate (52) further comprises a blowing channel (521) and an air inlet (522); the blowing holes (51) and the air inlet (522) are both connected to the blowing channel (521); and the blowing holes (51) are spaced apart and distributed along the rotation axis direction of the blowing plate (52).

7. The tab straightening device according to any one of claims 1 to 3, characterized in that: The movable seat (3) comprises a first connecting plate (33) and a second connecting plate (34), the first connecting plate (33) being transmission-connected to the driving member (2), the first connecting plate (33) having at least two connecting stations (331), each of the connecting stations (331) being arranged at intervals along the direction from the working position to the initial position of the movable seat (3), the second connecting plate (34) being assembled on the connecting station (331), and the shaping roller (4) and the blowing assembly (5) being assembled on the second connecting plate (34).

8. The tab straightening device according to claim 7, characterized in that: The second connecting plate (34) comprises a connecting arm (341) and a fixed arm (342) connected to the connecting arm (341); the connecting arm (341) is assembled on the connecting station (331); there are two groups of fixed arms (342); the two groups of fixed arms (342) and the connecting arm (341) form a U-shaped structure; the shaping roller (4) is assembled between the two groups of fixed arms (342); and the blowing assembly (5) is assembled on one of the fixed arms (342).

9. The tab straightening device according to any one of claims 1 to 3, characterized in that: The driving member (2) comprises a slide cylinder (21), and the movable seat (3) is fixedly assembled with a piston rod (22) of the slide cylinder (21).

10. A lithium battery welding device, characterized in that: The invention comprises the tab straightening device as described in any one of claims 1 to 9.

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