Cylindrical battery collector plate welding tool

Abstract

The utility model relates to the field of battery production, in particular to a cylindrical battery collector plate welding tool which is used for solving the problems that in the prior art, when a full-tab cylindrical battery is subjected to laser penetration welding, the end face of a collector plate is not subjected to pressure extrusion, the collector plate and a tab are not tightly attached, and the welding quality is poor. The technical problems that a welding burst point is prone to occurring when the welding tool is welded to a gap area between a current collecting disc and a tab, the laser penetration welding temperature is high, heat can be conducted to a diaphragm through the tab, and then the diaphragm is damaged are solved, the welding tool comprises a tool body, the tool body is provided with a round positioning groove, and a boss is arranged at the bottom of the positioning groove; the boss is concentric with the positioning groove, the boss is round, and the boss is provided with six through holes which are arranged in a circumferential mode.

Description

Technical Field

[0001] This utility model relates to the field of battery production, specifically a welding fixture for a cylindrical battery current collector. Background Technology

[0002] A fully tabbed cylindrical battery consists of positive and negative electrodes, an electrolyte, a separator, and a casing. After the positive electrode, separator, and negative electrode are processed internally, a conductive medium needs to be soldered to connect the cell and the current collector. The tabs are the metallic conductive mediums that lead the positive and negative electrodes out of the cell.

[0003] When laser penetration welding is performed on a cylindrical battery with multiple tabs, there is no pressure compression on the end face of the current collector, and the current collector and the tab are not tightly attached. When welding to the area where there is a gap between the current collector and the tab, welding explosions are likely to occur. In addition, the laser penetration welding temperature is high, and the heat will be conducted to the separator through the tab, thereby damaging the separator. Utility Model Content

[0004] This utility model provides a welding fixture for cylindrical battery current collectors to solve one of the above-mentioned technical problems.

[0005] A welding fixture for a cylindrical battery current collector includes a fixture body, the fixture body having a positioning groove, the positioning groove being circular, a boss being provided at the bottom of the positioning groove, the boss being concentric with the positioning groove, the boss being circular, and the boss having six through holes arranged circumferentially.

[0006] Furthermore, the tooling body is provided with a number of mounting holes.

[0007] Furthermore, the tooling body is provided with a coolant passage.

[0008] Furthermore, the height of the boss is 1.2 mm.

[0009] Furthermore, the tooling body is made of copper.

[0010] The beneficial effects of this utility model are as follows: pressing this utility model onto the collector plate can increase the downward pressure of the collector plate, making the collector plate fit with the electrode tab, avoiding gaps and thus preventing welding explosions, thereby improving the yield rate; the temperature of this utility model is reduced through the coolant passage, removing excess heat from the collector plate and preventing damage to the diaphragm. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the present invention.

[0012] Figure 2 This is a schematic diagram of the collector plate.

[0013] Figure 3This is a schematic diagram showing the usage state of this utility model.

[0014] Reference numerals in the attached drawings: 1. Tooling body; 2. Positioning groove; 3. Boss; 4. Through hole; 5. Mounting hole; 6. Coolant passage; 7. Manifold; 8. Groove; 9. Weld point. Detailed Implementation

[0015] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0016] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] A welding fixture for a cylindrical battery current collector includes a fixture body 1. The fixture body 1 has a positioning groove 2, which is circular. The bottom of the positioning groove 2 has a boss 3, which is concentric with the positioning groove 2. The boss 3 is circular and has six through holes 4 arranged circumferentially. The current collector 7 is circular and has a groove 8 in its center. During welding, the current collector 7 is placed on the cylindrical battery, and then the positioning groove of the fixture body 1 is pressed onto the current collector 7, so that the back of the current collector 7 is in close contact with the tab. Laser penetration welding is used on the groove 8 through the through holes 4 to heat the current collector 7 to a slight melting point, so that it is welded together with the tab on the back. A total of six groups of twelve weld points 9 are required.

[0019] In a preferred embodiment, the tooling body 1 is provided with a plurality of mounting holes 5. In this embodiment, the number of mounting holes 5 is six, which can be used to further press the collector plate 7 by cooperating with the mounting holes 5 with studs.

[0020] In a preferred embodiment, the tooling body 1 is provided with a coolant passage 6, through which coolant is injected into the tooling body 1 to absorb excess heat and prevent damage to the diaphragm.

[0021] In a preferred embodiment, the height of the boss 3 is 1.2 mm. Since the depth of the groove 8 is 1 mm, the height of the boss 3 is set to be slightly higher than the depth of the groove 8, so that the pressure is concentrated on the groove 8 and better fits the collector plate 7 and the electrode tab.

[0022] In a preferred embodiment, the tooling body 1 is made of copper, which provides better thermal conductivity.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A welding fixture for a cylindrical battery current collector, characterized in that: The tooling body includes a positioning groove, which is circular. A boss is provided at the bottom of the positioning groove, which is concentric with the positioning groove. The boss is circular and has six through holes arranged in a circle. A coolant passage is provided inside the tooling body.

2. The welding fixture for a cylindrical battery current collector according to claim 1, characterized in that: The tooling body is provided with several mounting holes.

3. The welding fixture for a cylindrical battery current collector according to claim 1, characterized in that: The height of the boss is 1.2 mm.

4. The welding fixture for a cylindrical battery current collector according to claim 1, characterized in that: The tooling body is made of copper.

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