Pre-welding auxiliary device

Abstract

The utility model relates to the technical field of pole lug welding, and discloses a pre-welding auxiliary device which comprises a pressing mechanism arranged on a battery cell, the pressing mechanism comprises a stabilizing plate and a pressing piece, the pressing piece is movably arranged on the stabilizing plate, the distance between the pressing piece and a pole lug is adjustable, and by adjusting the position of the pressing piece, the pre-welding auxiliary device can be used for pre-welding the pole lug. And one end of the pressing piece is opposite to and propped against the root part of the tab, so that the root part of the tab is pressed. The push block drives the gasket to horizontally move towards the tab, so that the gasket drives the pressing piece to slide in the sliding cavity, one end of the pressing piece extends out of the opening, opposite to the tab, of the sliding cavity by means of the elastic deformation effect of the pressing piece, the root of the tab is pressed by the pressing piece in an abutting mode, and therefore the tab can be clamped. The tightening state of the tabs in the ultrasonic welding process can be relieved, the situation that the tabs are subjected to ultrasonic high-frequency vibration to cause welding cracks can be effectively avoided, the welding yield of battery cells can be increased, and the welding quality of the battery cells is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pole tab welding, in particular to a pre-welding auxiliary device. Background Art

[0002] In the production process of lithium-ion batteries, the quality of the pre-welding of the tabs plays a vital role in the various performance indicators of the finished lithium-ion batteries. At present, when pre-welding the tabs, the tabs of the battery cell are usually placed on the welding seat for direct ultrasonic welding. This method has high requirements on the state of the tabs of the battery cell. The tabs are affected by ultrasonic high-frequency vibrations, and there may be a safety risk of cracking of the tabs during welding. In particular, the tabs of the positive electrode made of aluminum foil are more prone to cracking. Therefore, there is an urgent need for an auxiliary device for ultrasonic pre-welding of lithium-ion batteries. Utility Model Content

[0003] In order to solve the technical problems existing in the background technology, the utility model proposes a pre-welding auxiliary device.

[0004] The utility model proposes a pre-welding auxiliary device, including a clamping mechanism arranged on a battery cell, the clamping mechanism including a stabilizing plate and a clamping piece, the clamping piece is movably arranged on the stabilizing plate, and the distance between the clamping piece and the pole ear is adjustable, by adjusting the position of the clamping piece, one end of the clamping piece is opposite to and abuts against the root of the pole ear, thereby clamping the root of the pole ear.

[0005] As a further optimized solution of the utility model, the pressing piece is slidably arranged on the stabilizing plate and can be automatically limited.

[0006] As a further optimized solution of the utility model, the interior of the stabilizing plate is provided with a sliding cavity, one side opening of the sliding cavity is opposite to the pole ear, and the pressing member is slidably arranged in the sliding cavity.

[0007] As a further optimized solution of the utility model, a slide groove is provided on the stabilizing plate, and the slide groove is communicated with the sliding cavity, a gasket is installed on the pressing member, and the gasket is slidably arranged in the slide groove and can be automatically limited.

[0008] As a further optimized solution of the utility model, a push block is installed on the side of the gasket away from the clamping member, the push block is pressed on the stabilizing plate, and the width of the push block is greater than the width of the slide groove.

[0009] As a further optimized solution of the utility model, the surfaces where the push block and the stabilizing plate contact each other are both rough surfaces.

[0010] As a further optimized solution of the utility model, a connecting rod is installed on one side of the gasket away from the pressing piece, and the other end of the connecting rod is flush with the surface of the stabilizing plate and connected to the push block.

[0011] As a further optimized solution of the utility model, the stabilizing plate is an L-shaped plate, the L-shaped long side of the stabilizing plate is pressed on the upper surface of the battery cell, and the L-shaped short side of the stabilizing plate is in contact with the side of the battery cell and opposite to the root of the pole ear.

[0012] As a further optimized solution of the utility model, the pressing piece is a sheet material that can undergo elastic deformation.

[0013] The pre-welding auxiliary device proposed by the utility model has the following beneficial effects:

[0014] When the utility model is in use, the push block drives the gasket to move horizontally toward the pole ear, so that the gasket drives the clamping piece to slide in the sliding cavity, and the elastic deformation effect of the clamping piece is utilized to make one end of the clamping piece extend from the opening of the sliding cavity opposite to the pole ear. The clamping piece is utilized to abut and press the root of the pole ear, which can relieve the tension of the pole ear during ultrasonic welding, and can effectively avoid the situation that the pole ear is welded cracked due to ultrasonic high-frequency vibration, which is beneficial to improving the welding yield of the battery cell and improving the welding quality of the battery cell.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the clamping mechanism of the utility model.

[0018] Description of the drawings: 1. Battery cell; 2. Tab; 3. Stabilizing plate; 4. Pressing piece; 5. Push block; 6. Slide groove; 7. Gasket; 8. Sliding cavity. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] See also Figure 1 and Figure 2A pre-welding auxiliary device includes a clamping mechanism arranged on a battery cell 1, the clamping mechanism includes a stabilizing plate 3 and a clamping member 4, the clamping member 4 is movably arranged on the stabilizing plate 3, and the distance between the clamping member 4 and the pole lug 2 is adjustable, and by adjusting the position of the clamping member 4, one end of the clamping member 4 is opposite to and abuts against the pole lug 2, thereby clamping the root of the pole lug 2;

[0025] Specifically, the pressing member 4 is slidably disposed on the stabilizing plate 3 and can be automatically limited; a sliding groove can be provided on the stabilizing plate 3 or a cavity can be provided in the stabilizing plate 3 to facilitate the sliding of the pressing member 4, and the automatic limiting of the pressing member 4 after sliding can be achieved by fasteners, magnetic attraction, friction force, etc.;

[0026] Specifically, the interior of the stabilizing plate 3 has a sliding cavity 8, one side opening of the sliding cavity 8 is opposite to the pole lug 2, and the pressing piece 4 is slidably arranged in the sliding cavity 8. By adjusting the position of the pressing piece 4 in the sliding cavity 8, one end of the pressing piece 4 is passed through the opening. Since the opening is opposite to the root of the pole lug 2, the pressing piece 4 is in contact with the root of the pole lug 2, thereby achieving compression of the root of the pole lug 2.

[0027] Furthermore, a slide groove 6 is provided on the stabilizing plate 3, and the slide groove 6 is connected to the sliding cavity 8, and a gasket 7 is installed on the pressing member 4, and the gasket 7 is slidably arranged in the slide groove 6 and can be automatically limited, and the gasket 7 can be limited after sliding by friction, magnetic force or fastener action;

[0028] Furthermore, a push block 5 is installed on the side of the gasket 7 away from the pressing member 4, the push block 5 is pressed on the stabilizing plate 3, and the width of the push block 5 is greater than the width of the slide groove 6. The push block 5 slides on the upper end surface of the stabilizing plate 3 to drive the gasket 7 to slide in the slide groove 6, thereby driving the pressing member 4 to slide in the sliding cavity 8;

[0029] Furthermore, the surfaces of the push block 5 and the stabilizing plate 3 that contact each other are both rough surfaces. By performing surface treatment on the contact surfaces of the push block 5 and the stabilizing plate 3, the friction of the contact surfaces is increased. The push block 5 is manually pushed to overcome the friction, so that the push block 5 drives the gasket 7 and the pressing member 4 to slide. After the push block 5 loses the external force pushing action, the push block 5 stops moving under the action of the friction force, thereby stabilizing the pressing member 4 and achieving stable pressing of the pressing member 4 on the root of the pole lug 2.

[0030] Furthermore, a connecting rod is installed on the side of the gasket 7 away from the pressing member 4, and the other end of the connecting rod is flush with the surface of the stabilizing plate 3 and connected to the push block 5. The push block 5 and the gasket 7 are connected by the connecting rod, so that when the push block 5 slides on the upper end surface of the stabilizing plate 3, it can drive the gasket 7 and the pressing member 4 to move synchronously;

[0031] In this embodiment, if Figure 2As shown, the stabilizing plate 3 is an L-shaped plate, the L-shaped long side of the stabilizing plate 3 is pressed on the upper surface of the battery cell 1, and the L-shaped short side of the stabilizing plate 3 is in contact with the side of the battery cell 1 and opposite to the root of the pole ear 2;

[0032] The stabilizing plate 3 is made of metal and can be directly placed on the upper surface of the battery cell 1. The stabilizing plate 3 can be stably placed by utilizing its own weight.

[0033] Furthermore, the sliding cavity 8 is an L-shaped cavity and corresponds to the L-shaped plate, so that the pressing member 4 slides in the L-shaped sliding cavity. The L-shaped structural design facilitates the combination of the pressing mechanism with the battery cell 1, and also facilitates the pressing member 4 to extend to the outside of the opening of the sliding cavity 8 to abut and press the root of the pole ear 2;

[0034] Furthermore, the pressing member 4 is a sheet material that can undergo elastic deformation, such as a PET film, a PP sheet or a PVC film, etc. Under the pushing action of the push block 5, the front end of the pressing member 4 moves toward the L-shaped short side bend of the stabilizing plate 3 and undergoes elastic deformation, so that the front end of the pressing member 4 is opposite to the root of the pole lug 2 and compresses the root of the pole lug 2. When not in use, the push block 5 only needs to be retracted and the pressing member 4 can be restored to its deformation.

[0035] It should be noted that the stabilizing plate 3 may also be in the form of a flat plate, which is fixed to the side of the battery cell 1 by a fastener and is opposite to the root of the pole lug 2. By adjusting the position of the clamping member 4 in the stabilizing plate 3 so that the bottom end of the clamping member 4 passes through the outside of the stabilizing plate 3 and abuts against the root of the pole lug 2, the clamping effect can also be achieved.

[0036] In summary, the pre-welding auxiliary device proposed in the utility model, when in use, drives the gasket 7 to move horizontally toward the pole lug 2 through the push block 5, so that the gasket 7 drives the clamping piece 4 to slide in the sliding cavity 8, and utilizes the elastic deformation effect of the clamping piece 4 to make one end of the clamping piece 4 extend from the opening of the sliding cavity 8 opposite to the pole lug 2. The clamping piece 4 is used to abut and press the root of the pole lug 2, which can relieve the tension of the pole lug 2 during ultrasonic welding, and can effectively avoid the situation where the pole lug 2 is subjected to ultrasonic high-frequency vibration and weld cracks, which is beneficial to improving the welding yield of the battery cell and improving the welding quality of the battery cell.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pre-welding auxiliary device, characterized in that: The invention comprises a clamping mechanism arranged on the battery core (1), the clamping mechanism comprising a stabilizing plate (3) and a clamping piece (4), the clamping piece (4) being movably arranged on the stabilizing plate (3), and the distance between the clamping piece (4) and the pole lug (2) being adjustable, and by adjusting the position of the clamping piece (4), one end of the clamping piece (4) is opposite to and abuts against the root of the pole lug (2).

2. A pre-welding auxiliary device according to claim 1, characterized in that: The pressing piece (4) is slidably arranged on the stabilizing plate (3) and can be automatically limited.

3. A pre-welding auxiliary device according to claim 2, characterized in that: The interior of the stabilizing plate (3) is provided with a sliding cavity (8), one side opening of the sliding cavity (8) is opposite to the pole ear (2), and the pressing piece (4) is slidably arranged in the sliding cavity (8).

4. A pre-welding auxiliary device according to claim 3, characterized in that: A slide groove (6) is provided on the stabilizing plate (3), and the slide groove (6) is communicated with the slide cavity (8). A gasket (7) is installed on the pressing member (4), and the gasket (7) is slidably arranged in the slide groove (6) and can be automatically limited.

5. A pre-welding auxiliary device according to claim 4, characterized in that: A push block (5) is installed on the side of the gasket (7) away from the pressing member (4), the push block (5) is pressed on the stabilizing plate (3), and the width of the push block (5) is greater than the width of the slide groove (6).

6. A pre-welding auxiliary device according to claim 5, characterized in that: The surfaces of the push block (5) and the stabilizing plate (3) that contact each other are both rough surfaces.

7. A pre-welding auxiliary device according to claim 5, characterized in that: A connecting rod is installed on one side of the gasket (7) away from the pressing member (4), and the other end of the connecting rod is flush with the surface of the stabilizing plate (3) and connected to the push block (5).

8. A pre-welding auxiliary device according to any one of claims 1 to 7, characterized in that: The stabilizing plate (3) is an L-shaped plate, the L-shaped long side of the stabilizing plate (3) is pressed onto the upper surface of the battery core (1), and the L-shaped short side of the stabilizing plate (3) is in contact with the side of the battery core (1) and is opposite to the root of the pole ear (2).

9. A pre-welding auxiliary device according to claim 8, characterized in that: The pressing piece (4) is a sheet material that can undergo elastic deformation.

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