A sodium battery connector welding head device

Abstract

This utility model relates to a welding head device for sodium battery connectors in the field of battery welding technology. It includes a pressure plate and a flow guide cover plate mounted on the upper surface of the pressure plate. The lower surface of the pressure plate has a limiting groove at its center corresponding to the insertion of the battery cell. The bottom of the limiting groove has a light-transmitting notch for laser welding. The surface of the flow guide cover plate has a circular hole corresponding to the light-transmitting notch. The wall of the circular hole has an annular channel. The outer wall of the flow guide cover plate has multiple airflow holes symmetrically arranged connecting to the annular channel. A throttling valve is installed at the outer end of each airflow hole. This welding head device can prevent weld slag spatter and improve welding protection.

Description

Technical Field

[0001] This utility model relates to the field of battery welding technology, and in particular to a welding head device for sodium battery connecting pieces. Background Technology

[0002] As is well known, sodium battery cells are generally made of wound electrode sheets. The end face welded connecting pieces can serve both a fixing function and a conductive function. Currently, the more advanced welding method is laser penetration welding, which not only facilitates welding positioning but also ensures the aesthetics and structural strength of the weld. However, during the welding process, problems such as slag spatter and metal shavings residue may occur, which greatly affect the product quality. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art and solve the existing technical problems, this utility model discloses a welding head device for sodium battery connecting pieces, which can avoid welding slag spatter residue and improve the welding protection effect.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A welding head device for sodium battery connectors includes a pressure plate and a flow guide cover plate mounted on the upper surface of the pressure plate. The lower surface of the pressure plate has a limiting groove corresponding to the insertion of the battery cell at its center. The bottom of the limiting groove has a light-transmitting notch for laser welding. The surface of the flow guide cover plate has a circular hole corresponding to the light-transmitting notch. The wall of the circular hole has an annular channel. The outer wall of the flow guide cover plate has a plurality of airflow holes that connect to the annular channel in a rotationally symmetrical manner. A throttling valve is installed at the outer end of each airflow hole.

[0005] Furthermore, the bottom of the inner groove of the limiting groove is symmetrically provided with multiple positioning protrusions.

[0006] Furthermore, the light-transmitting holes are uniformly arranged in a ring of four, and each light-transmitting hole is an L-shaped hole with an angle close to the center of the limiting groove.

[0007] Furthermore, the upper end of the light-transmitting notch is provided with a first chamfer.

[0008] Furthermore, an installation plate is connected between the pressure plate and the flow guide cover.

[0009] Furthermore, the opening of the limiting groove is provided with a second chamfer.

[0010] Furthermore, each airflow hole is offset from the central axis of the circular hole.

[0011] Furthermore, the airflow holes are provided in four places.

[0012] By adopting the technical solution described above, this utility model has the following beneficial effects: The sodium battery connector welding head device disclosed in this utility model uses a pressure plate to position the welding wire of the battery cell, which facilitates welding laser welding along the light-transmitting notch. The parts that do not need to be welded are shielded to prevent the small amount of welding slag generated during the welding process from splashing into the battery cell and causing short circuits inside the battery cell, thus reducing the yield rate. At the same time, the device can introduce the welding protective atmosphere into the annular channel through the airflow hole to ensure a slow and stable gas flow rate and uniform coverage of the welding surface. This not only avoids oxidation of the welding surface but also blows away the residue, achieving a good welding protection effect. Overall, it has a significant impact on improving the battery cell welding qualification rate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of an embodiment of the present utility model; Figure 2 This is a bottom view of the structure of the pressure plate; Figure 3 This is a cross-sectional structural schematic diagram of the pressure plate; Figure 4 This is a schematic diagram of the structure of the flow guide cover.

[0014] In the diagram: 1. Guide cover; 2. Annular channel; 3. Throttling valve; 4. Pressure plate; 5. Mounting plate; 6. Limiting groove; 7. Light-transmitting notch; 8. Positioning protrusion; 9. Round hole; 10. Airflow hole. Detailed Implementation

[0015] The technical solution of this utility model will be described below with reference to the accompanying drawings of the embodiments of this utility model. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this utility model for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0016] Combined with appendix Figure 1-4The sodium battery connector welding head device includes a pressure plate 4 and a flow guide cover 1 installed on the upper surface of the pressure plate 4. A limiting groove 6 corresponding to the insertion of the battery cell is provided in the center of the lower surface of the pressure plate 4. Since the battery cell is generally formed by rolling electrode sheets into a cylindrical shape, the limiting groove 6 is also designed as a corresponding circular groove. The opening of the limiting groove 6 has a second chamfer to facilitate the insertion of the upper end of the battery cell. As needed, multiple positioning protrusions 8 are symmetrically provided on the inner bottom of the limiting groove 6. The positioning protrusions 8 can accurately position the battery cell within the pressure head, ensuring that the part of the battery cell to be welded coincides with the light-transmitting notch 7 of the pressure plate 4. The bottom of the limiting groove 6 has a light-transmitting notch 7 for laser welding, facilitating welding along the light-transmitting notch 7. Parts not requiring welding are shielded to prevent the small amount of welding slag generated during welding from splashing into the battery cell, causing a short circuit and reducing the yield. A first chamfer is provided at the upper end of the light-transmitting notch 7, which not only facilitates tilted welding but also facilitates the outward splashing of welding slag. Furthermore, as shown in the attached... Figure 2 As shown, there are four light-transmitting holes 7 evenly arranged in a ring, and each light-transmitting hole 7 is an L-shaped hole with an angle close to the center of the limiting groove 6. This means that there are four welding lines, which fully ensures the connection strength. The positioning protrusion 8 can be placed at the blocking position between two corresponding light-transmitting holes 7. The flow guide cover 1 has circular holes 9 corresponding to the light-transmitting notches 7 on its surface. The size of the circular holes 9 is such that they do not obstruct welding. The walls of the circular holes 9 have annular channels 2. The outer wall of the flow guide cover 1 has multiple airflow holes 10 that connect to the annular channels 2, arranged symmetrically. After the protective atmosphere enters through the airflow holes 10, it can spread out using the annular channels 2 to protect the welding surface. A throttling valve 3 is installed at the outer end of the airflow holes 10 to control the flow rate. As needed, see attached... Figure 4 As shown, there are four airflow holes 10, each of which is offset from the central axis of the circular hole 9. This makes it easier to form a circulation, making the airflow more uniform. This can not only prevent oxidation of the welding surface, but also blow away the residue, thus achieving a better welding protection effect.

[0017] As needed, a mounting plate 5 connects the pressure plate 4 and the flow guide cover 1, such as... Figure 3 As shown, the upper part of the pressure plate 4 is cylindrical and the lower part is square. The mounting plate 5 has a hole in the middle and is fitted onto the upper part of the pressure plate 4. It is connected and fixed to the pressure plate 4 and the guide cover plate 1 by bolts to ensure the sealing of the inner wall gap. The edge of the mounting plate 5 can be used to connect external frame equipment.

[0018] The sodium battery connecting piece welding head device of this utility model is implemented by inserting the upper end of the battery cell to be welded into the limiting groove 6 of the pressure plate 4 for positioning. First, the throttle valve 3 is adjusted to ensure that the protective atmosphere enters the annular channel 2 stably to form a protective surface. Then, the laser welding equipment is started to weld the corresponding light-transmitting hole 7 of the pressure plate 4. The welding slag and debris generated can be blown away and removed to prevent them from entering the battery cell. The overall structure is simple, easy to use, has high positioning accuracy, and low manufacturing cost, which has a significant impact on improving the battery cell qualification rate.

[0019] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A welding head device for sodium battery connectors, characterized in that: The device includes a pressure plate and a flow guide cover plate mounted on the upper surface of the pressure plate. The lower surface of the pressure plate has a limiting groove in the center corresponding to the insertion of the battery cell. The bottom of the limiting groove has a light-transmitting notch for laser welding. The surface of the flow guide cover plate has a circular hole corresponding to the light-transmitting notch. The wall of the circular hole has an annular channel. The outer wall of the flow guide cover plate has multiple airflow holes that connect to the annular channel in a rotationally symmetrical manner. A throttling valve is installed at the outer end of each airflow hole.

2. The sodium battery connector welding head device according to claim 1, characterized in that: The bottom of the limiting groove is symmetrically provided with multiple positioning protrusions.

3. The sodium battery connector welding head device according to claim 1, characterized in that: The light-transmitting holes are uniformly arranged in a ring of four, and each light-transmitting hole is an L-shaped hole with an angle close to the center of the limiting groove.

4. The sodium battery connector welding head device according to claim 1, characterized in that: The upper end of the light-transmitting notch is provided with a first chamfer.

5. The sodium battery connector welding head device according to claim 1, characterized in that: An installation plate is connected between the pressure plate and the flow guide cover.

6. The sodium battery connector welding head device according to claim 1, characterized in that: The opening of the limiting groove is provided with a second chamfer.

7. The sodium battery connector welding head device according to claim 1, characterized in that: Each airflow hole is offset from the central axis of the circular hole.

8. The sodium battery connector welding head device according to claim 1, characterized in that: The airflow holes are provided with four.

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