Sealing nail fixing pressing claw structure for small test line cylindrical battery sealing nail prewelding

Abstract

The utility model discloses a sealing nail fixing press claw structure for pre-welding a sealing nail of a small test line cylindrical battery, which belongs to the technical field of sealing nail welding and comprises a plate body and a bar. Three open grooves are formed in the plate face of the plate body, and the three open grooves are arranged in a triangular shape. The bar comprises a straight section and an inclined section, and a disc is arranged at the tail end of the inclined section. The pressing claw mainly has two advantages that: 1, when the pressing claw is used for a long time, the conditions of deviation and looseness in the downward pressing action process are reduced; and secondly, the contact area between the pressing claw and the sealing nail to be welded is increased, and the force for pressing the sealing nail can be better and uniformly dispersed.

Description

Technical Field

[0001] The utility model belongs to the technical field of seal nail welding, and particularly relates to a seal nail fixing press claw structure for pre-welding the seal nails of cylindrical batteries in a pilot production line. Background Art

[0002] At present, in the production of cylindrical batteries in the pilot production line, first, when pre-welding the seal nails at the liquid injection port of the cylindrical battery, a press claw is used to fix the position of the seal nail, which is the first step in the seal nail welding process. Only in this way can the metallography of the seal nail reach the qualified level after welding, and the appearance of laser welding reach a good level. Therefore, it is extremely important to fix the position of the seal nail well. However, the current fixing method of the press claw itself is a two-point linear fixing. In the initial stage of use, it performs well. After a long time, there is wear at the joint between the press claw and the screw, resulting in the press claw swinging during movement. As a result, when the press claw fixes the seal nail, the fitting degree is uneven on the entire circumference of the seal nail and the battery liquid injection port, ultimately affecting the effect of laser welding of the seal nail. Second, before laser welding the seal nail, pre-welding needs to be carried out first. While performing laser pre-welding, the press claw is pressed on the center of the seal nail. The contact method between the end of the press claw and the seal nail during the pre-welding operation of the seal nail at the liquid injection port of the cylindrical battery before improvement is that the former is a point and the latter is a surface, that is, it is a point-to-surface contact, which makes the force exerted by the press claw easy to deviate, affecting the uniform dispersion of the force, and further affecting the effect of laser welding. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a seal nail fixing press claw structure for pre-welding the seal nails of cylindrical batteries in a pilot production line. 1. Corresponding improvements are made to the first defect described above in the laser welding of the seal nail. The current fixing method of the press claw itself is fixed by two screws on a straight line. The improved fixing method is to utilize the strong geometric stability of the triangle to fix the press claw itself. Thus, when the press claw is pressed towards the seal nail under the drive of power, the effect is better, ensuring that the position of the seal nail does not shift, and the fitting degree with the circumferential position of the liquid injection port of the battery reaches uniformity, so as to promote the improvement of the yield rate of laser welding of the seal nail. 2. Corresponding improvements are made to the second defect described above in the laser welding of the seal nail. The current contact method between the press claw and the seal nail to be laser welded is point-to-surface; the end of the improved press claw is disk-shaped, which is surface-to-surface contact. In this way, the pressure of the press claw pressing the seal nail to be laser welded can be better evenly dispersed, thereby promoting the more uniform and appropriate fitting degree between the seal nail to be welded and the liquid injection port of the battery on the circumference, and ultimately promoting the improvement of the effect of seal nail welding.

[0004] The purpose of the present utility model is achieved as follows: A sealing nail fixing pressure jaw structure for pre-welding cylindrical batteries on a small-scale test line, which comprises a plate body and a strip rod; three slots are arranged on the plate surface of the plate body, and the three slots are arranged in a triangular shape; the strip rod comprises a straight section and an inclined section, and a disc is arranged at the end of the inclined section.

[0005] Further, the plate body is a triangular plate, and the plate body is fixedly connected with a carrier.

[0006] Further, the included angle between the straight section and the inclined section is 120°.

[0007] Further, a non-metallic material layer is arranged on the outer part of the disc.

[0008] Further, the carrier is connected with a piston rod, and the piston rod is connected with a rotary cylinder.

[0009] Further, the end of the inclined section faces the center position of the sealing nail.

[0010] Further, the non-metallic material layer is polytetrafluoroethylene.

[0011] The beneficial effects of the present utility model: Through the self-fixing method of the pressure jaw structure and the contact method at the end of the pressure jaw itself: The pressure jaw is designed in a triangular fixing method, so as to reduce the situation of deviation and looseness during use. The end of the pressure jaw itself is designed in a disc shape for contact, so as to expand the contact area with the object to be laser welded; at the same time, a non-metallic material layer is arranged on the outer part of the disc, which has the properties of wear resistance and high temperature resistance. The improved pressure jaw structure mainly has two advantages: When the pressure jaw is used for a long time, the situation of deviation and looseness during the downward pressing action is reduced. The contact area between the pressure jaw itself and the sealing nail to be welded is increased, so that the force for pressing down the sealing nail can be better evenly dispersed. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the welding position of the sealing nail;

[0013] Figure 2 It is a schematic diagram of the prior art pressure jaw structure;

[0014] Figure 3 It is a schematic diagram of the pressure jaw structure of the present utility model.

[0015] In the figure: 1. Plate body; 2. Strip rod; 3. Slot; 4. Straight section; 5. Inclined section; 6. Disc; 7. Carrier; 8. Piston rod. Detailed Embodiment

[0016] The following further describes the present utility model in detail with reference to the accompanying drawings. It should be noted that all azimuth terms such as up and down, front and back, left and right in the present utility model do not limit the present utility model, but are only for clearer description and explanation of the present utility model. Embodiment

[0017] As Figures 1 - 3 shown, this embodiment discloses a sealing nail fixing and pressing claw structure for pre-welding the sealing nail of a small-scale cylindrical battery. It includes a plate body 1 and a bar 2; three slots 3 are arranged on the plate surface of the plate body 1, and the three slots 3 are arranged in a triangular shape; the bar 2 includes a straight section 4 and an inclined section 5, and a disc 6 is arranged at the end of the inclined section 5. The surface of the disc 6 contacts the surface of the sealing nail to be laser-welded. In this contact method, the force exerted by the pressing claw on the sealing nail is improved, so that the fitting degree between the sealing nail and the circumference of the battery liquid injection port is better. The area of the contact surface of the pressing claw (is less than) the area of the sealing nail (preferably, the centers of the two contact surfaces can be adjusted to coincide), and at the same time, referring to the laser pre-welding track, it is appropriate not to affect the pre-welding effect. The three slots 3 are arranged in a triangular shape. The triangular fixing method reduces the situation of deviation and loosening during use. The end of the pressing claw itself is designed in the shape of a disc 6 for contact, which expands the contact area with the sealing nail to be laser-welded; at the same time, a non-metallic material layer is arranged outside the disc 6, which has the properties of wear resistance and high temperature resistance. Embodiment

[0018] As Figures 1 - 3 shown, this embodiment discloses a sealing nail fixing and pressing claw structure for pre-welding the sealing nail of a small-scale cylindrical battery. It includes a plate body 1 and a bar 2; three slots 3 are arranged on the plate surface of the plate body 1, and the three slots 3 are arranged in a triangular shape; the bar 2 includes a straight section 4 and an inclined section 5, and a disc 6 is arranged at the end of the inclined section 5.

[0019] For better effect, the plate body 1 is a triangular plate, and the plate body 1 is fixedly connected with a carrier 7. There are three long strip-shaped corresponding slots on one surface of the carrier 7 for easy adjustment of the position and fixing of the screws.

[0020] For better effect, the included angle between the straight section 4 and the inclined section 5 is 120°. With reference to the actual distance from the carrier 7 to the sealing nail welding position, the bending is carried out at a suitable position. Embodiment

[0021] As Figures 1 - 3As shown, this embodiment discloses a sealing nail fixing and pressing jaw structure for pre-welding cylindrical battery sealing nails on a small-scale test line, which includes a plate body 1 and a bar 2; three slots 3 are arranged on the plate surface of the plate body 1, and the three slots 3 are arranged in a triangular shape; the bar 2 includes a straight section 4 and an inclined section 5, and a disc 6 is arranged at the end of the inclined section 5, and the disc 6 is wrapped by a non-metallic material with wear-resistant and high-temperature-resistant properties.

[0022] For better effect, the plate body 1 is a triangular plate, and the plate body 1 is fixedly connected with a carrier 7. The material of the carrier 7 has wear-resistant properties and is used to fix the pressing jaw itself. The three corresponding slots arranged on the carrier 7 are used to adjust the position of the pressing jaw according to the position of the sealing nail (or the positioning adjustment of the pressing jaw itself can also be carried out when switching different models of batteries).

[0023] For better effect, the included angle between the straight section 4 and the inclined section 5 is 120°. The angle formed by the bending can be selected as 120° or other angles. When welding the sealing nail, it is referenced that it does not affect the movement track of the laser welding head.

[0024] For better effect, a non-metallic material layer is wrapped outside the disc 6, and the non-metallic material layer is polytetrafluoroethylene.

[0025] For better effect, the carrier 7 is connected with a piston rod 8, and the piston rod 8 is connected with a rotary cylinder.

[0026] For better effect, the end of the inclined section 5 faces the center position of the sealing nail, so as to achieve a balanced circumferential fit between the sealing nail and the liquid injection port of the battery and promote the final sealing nail welding effect.

[0027] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A sealing nail fixing and pressing claw structure for pre-welding of sealing nails for small test line cylindrical batteries, characterized in that: It comprises a plate body (1) and a bar (2); the plate surface of the plate body (1) is provided with three slots (3), and the three slots (3) are arranged in a triangular shape; the bar (2) comprises a straight section (4) and an inclined section (5), and a disc (6) is arranged at the end of the inclined section (5).

2. According to claim 1, the sealing nail fixing and pressing claw structure for pre-welding of sealing nails for small test line cylindrical batteries is characterized in that: The plate body (1) is a triangular plate, and the plate body (1) is fixedly connected to a carrier (7).

3. The sealing nail fixing and pressing claw structure for pre-welding of sealing nails for small test line cylindrical batteries according to claim 1 is characterized in that: The included angle between the straight section (4) and the inclined section (5) is 120°.

4. The sealing nail fixing and pressing claw structure for pre-welding of sealing nails for small test line cylindrical batteries according to claim 1 is characterized in that: The outside of the disc (6) is wrapped with a non-metallic material layer.

5. The sealing nail fixing and pressing claw structure for pre-welding of sealing nails for small test line cylindrical batteries according to claim 2, characterized in that: The carrier (7) is connected to a piston rod (8), and the piston rod (8) is connected to a rotary cylinder.

6. The sealing nail fixing and pressing claw structure for pre-welding of sealing nails for small test line cylindrical batteries according to claim 1, characterized in that: The end of the inclined section (5) faces the center of the sealing pin.

7. The sealing nail fixing and pressing claw structure for pre-welding of sealing nails for small test line cylindrical batteries according to claim 4 is characterized in that: The non-metal material layer is polytetrafluoroethylene.

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