Cylindrical battery tab welding jig
By designing a fixture for welding the cylindrical battery ears, the step structure and guide grooves are used to achieve precise guidance and bending of the ears, the problem of poor positioning accuracy of the ears in the prior art is solved, and the welding quality and efficiency are improved.
Patent Information
- Application Number
- CN202421481246.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-06-26
AI Technical Summary
In the prior art, the positioning accuracy of the cylindrical battery ears is poor, resulting in poor welding quality and consistency and low processing efficiency.
A cylindrical battery electrode ear welding fixture is designed, including the fixture base and welding clamp. Through the cooperation of the step structure and the guide groove, the precise guidance and bending of the ears are achieved, ensuring the close fit between the ears and the steel shell.
Improves welding quality and consistency, reduces the need for manual shaping, improves production efficiency, and ensures that the position of the pole ears is the same for each welding.
Smart Images
Figure CN222873690U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cylindrical battery welding, in particular to a cylindrical battery tab welding jig. Background Art
[0002] The positive pole tabs of cylindrical batteries are welded to the steel shell by laser. In the prior art, only the winding core and the steel shell are generally positioned, and the tabs are manually shaped and then welded. The processing efficiency is low, and the positioning accuracy of the tabs is poor. It cannot be guaranteed that the tabs are always located on the center line of the steel shell. The tabs are very easy to be skewed during the welding process, which can easily lead to poor contact during welding and problems such as tab cold welding, resulting in poor welding quality and consistency. Utility Model Content
[0003] The utility model aims to provide a cylindrical battery tab welding jig with high processing efficiency and the ability to improve welding quality and consistency.
[0004] A cylindrical battery tab welding jig comprises a jig base and a welding clamp, wherein the jig base comprises a base and a placement seat, the placement seat is provided with a step structure, the step structure is connected to the base, the base is provided with a first groove for placing a steel shell, the placement seat is provided with a second groove for placing a winding core, the step structure is provided with a first guide groove, the welding clamp is provided with a second guide groove, and the first guide groove and the second guide groove are used to guide the tab.
[0005] In the above scheme, when welding the steel shell and the pole ear of the cylindrical battery, the winding core is placed in the second groove of the placement seat, and the steel shell is placed in the first groove of the base. The pole ear on the winding core can just contact the first guide groove on the step structure. The winding core and the pole ear are pressed by the welding clamp so that the pole ear can be bent along the first guide groove, and then guided by the second guide groove on the welding clamp, the pole ear is bent so that the pole ear fits the steel shell. In this way, the pole ear can be accurately guided to the preset position, the pole ear will not be skewed, and the quality and consistency of welding can be improved. The cooperation of the jig base and the welding clamp does not require manual shaping of the position of the pole ear, which can improve production efficiency.
[0006] Furthermore, the first guide groove is inclined from top to bottom relative to the horizontal plane, and the second guide groove is inclined from right to left relative to the vertical plane.
[0007] In the above scheme, the winding core is placed in the second groove, and the position of the pole ear is just opposite to the step structure. Since the first guide groove is inclined from top to bottom relative to the horizontal line, the pole ear can be inclined from the placement seat toward the first groove on the base. After the pole ear enters the steel shell after the first bending, since the second guide groove on the welding clamp is inclined from right to left relative to the vertical plane, when the welding clamp presses down the end of the pole ear, the pole ear can be tilted smoothly and bent for the second time, ensuring that the pole ear fits tightly with the steel shell, and also ensuring that the position of the pole ear fitting with the steel shell is the same each time, thereby ensuring the quality and consistency of welding.
[0008] Furthermore, the first guide groove intersects with the first groove, and the depth of the first guide groove is deeper than that of the first groove.
[0009] In the above scheme, since there is a certain gap between the pole ear and the outer periphery of the winding core, the first guide groove intersects with the first groove, so that the pole ear can be accurately positioned on the first guide groove. Because the pole ear is perpendicular to the winding core, it needs to be bent to fit with the first guide groove, and the pole ear also has a certain thickness, so designing the depth of the first guide groove to be deeper than the first groove can better ensure the flatness of the pole ear.
[0010] Furthermore, the first guide groove is rectangular, and a center line of the first guide groove and a center line of the second guide groove are on a straight line.
[0011] In the above scheme, the first guide groove is rectangular and corresponds to the shape of the pole ear, and both side edges of the first guide groove and the second guide groove are parallel to the pole ear, so that the pole ear can be flatly embedded in the first guide groove and the second guide groove, ensuring that the pole ear will not deviate from the predetermined path during the welding process, effectively avoiding assembly errors, and improving the consistency and quality of the product. The center lines of the first guide groove and the second guide groove are on the same line as the center line of the steel shell, which can ensure that the pole ear is automatically corrected to the center of the steel shell.
[0012] Furthermore, the welding clamp includes a first pressure rod and a second pressure rod, the first pressure rod is vertically connected to the second pressure rod, the first pressure rod is used to press the winding core, and the second pressure rod is used to press the pole ear and the steel shell.
[0013] In the above scheme, the first pressure rod presses the winding core to ensure the stability of the winding core during the welding process, thereby ensuring the stability of the pole ear. The second pressure rod is vertically connected to the first pressure rod, and the second pressure rod is used to press the pole ear and the steel shell to ensure that the welded part of the pole ear is tightly connected to the steel shell, thereby ensuring the welding quality.
[0014] Furthermore, the second guide groove is arranged on the arc surface of the second pressure rod, and a first cross section and a second cross section having the same inclination direction as the second guide groove are formed on both sides of the second guide groove.
[0015] In the above scheme, the second guide groove can ensure the stability of the pole ear during the welding process. When the second pressure rod is pressed down, the pole ear is pressed again at the bottom of the second pressure rod along the inclined path guided by the second guide groove. A first section and a second section with the same inclined direction as the second guide groove are formed on both sides of the second guide groove. This is to avoid the protrusions on both sides of the arc surface from scratching the pole ear and causing damage to the pole ear after the second groove is processed, thereby ensuring the quality of processing.
[0016] Furthermore, a welding hole penetrating the first pressure rod and the second pressure rod is formed on the welding clamp block.
[0017] In the above scheme, the second pressure rod is pressed on the pole ear and the steel shell, and the laser beam of laser welding can pass through the first pressure rod and the second pressure rod to the position of the pole ear through the welding hole, thereby realizing laser welding of the pole ear and the steel shell. Under the pressure of the second pressure rod, the situation of poor contact between the pole ear and the steel shell causing the pole ear to be poorly welded is avoided.
[0018] Furthermore, a first step surface and a second step surface are formed on the circumferential side of the first groove.
[0019] In the above scheme, after the first groove is opened in the placement seat, a first step surface and a second step surface are formed on the circumference of the first groove. The first step surface is located on the placement seat, and the second step surface is located on the step structure, thereby ensuring that the tab can be guided to the first groove.
[0020] Furthermore, the second groove is cylindrical, and a circular third groove is provided at the bottom of the second groove.
[0021] In the above scheme, there is a convex structure at the bottom of the cylindrical battery steel shell, the steel shell is embedded in the cylindrical second groove, and the convex structure is just located in the third groove, thereby ensuring the stability of the steel shell during welding and improving the quality of welding.
[0022] Furthermore, the peripheral sides of the base, the step structure and the placement seat are all provided with chamfered structures.
[0023] In the above scheme, the chamfered structure can reduce sharp edges and corners, thereby reducing the possibility of scratches on the steel shell, winding core and tab, and improving the production quality.
[0024] The utility model discloses a cylindrical battery pole ear welding jig with high processing efficiency and the beneficial effects of improving welding quality and consistency. When welding the steel shell and the pole ear of the cylindrical battery, the coil core is placed in the second groove of the placement seat, and the steel shell is placed in the first groove of the base. The pole ear on the coil core can just contact the first guide groove on the step structure. The coil core and the pole ear are pressed by the welding clamp block, so that the pole ear can be bent along the first guide groove, and then guided by the second guide groove on the welding clamp block, the pole ear is bent so that the pole ear fits the steel shell, so that the pole ear can be accurately guided to the preset position, the pole ear will not be skewed, and the quality and consistency of welding can be improved. The cooperation of the jig base and the welding clamp block does not require manual shaping of the position of the pole ear, which can improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 A three-dimensional diagram of a cylindrical battery tab welding fixture according to an embodiment.
[0026] Figure 2 It is a schematic diagram of the decomposition of a cylindrical battery tab welding fixture according to one embodiment.
[0027] Figure 3 Schematic diagram of the welding clamp structure in one embodiment.
[0028] Figure 4 Schematic diagram of the fixture base structure in one embodiment.
[0029] Explanation of the accompanying drawings: 1. fixture base; 11. base; 12. placement seat; 121. first step surface; 2. welding clamp; 21. first pressure rod; 22. second pressure rod; 221. first section; 222. second section; 3. step structure; 31. second step surface; 4. first groove; 5. second groove; 6. first guide groove; 7. second guide groove; 8. welding hole; 9. third groove; 10. chamfer structure; 100. steel shell; 200. winding core; 300. pole ear. DETAILED DESCRIPTION
[0030] The cylindrical battery tab welding jig of the utility model will be further described in detail below in conjunction with specific embodiments and drawings.
[0031] like Figures 1 to 4As shown, in a preferred embodiment, a cylindrical battery tab welding jig of the utility model comprises a jig base 1 and a welding clamp 2, the jig base 1 comprises a base 11 and a placement seat 12, the placement seat 12 is provided with a step structure 3, the step structure 3 is connected to the base 11, the base 11 is provided with a first groove 4 for placing a steel shell 100, the placement seat 12 is provided with a second groove 5 for placing a winding core 200, the step structure 3 is provided with a first guide groove 6, the welding clamp 2 is provided with a second guide groove 7, the first guide groove 6 and the second guide groove 7 are used to guide the tab 300. When welding the steel shell 100 and the pole lug 300 of the winding core 200 of the cylindrical battery, the winding core 200 is placed in the second groove 5 of the placement seat 12, and the steel shell 100 is placed in the first groove 4 of the base 11. The pole lug 300 on the winding core 200 can just be in contact with the first guide groove 6 on the step structure 3. The winding core 200 and the pole lug 300 are pressed by the welding clamp 2, so that the pole lug 300 can be bent along the first guide groove 6, and then guided by the second guide groove 7 on the welding clamp 2, the pole lug 300 is bent so that the pole lug 300 fits the steel shell 100. In this way, the pole lug 300 can be accurately guided to the preset position, and the pole lug 300 will not be skewed, which can improve the quality and consistency of welding. The cooperation between the jig base 1 and the welding clamp 2 does not require manual shaping of the position of the pole lug 300, which can improve production efficiency.
[0032] In the above embodiment, a plurality of side-by-side first grooves 4 can be provided on the base 11, a plurality of side-by-side second grooves 5 can be provided on the placement seat 12, a plurality of first guide grooves 6 can be provided on the step structure 3, and the jig base 1 is provided with a plurality of welding clamps 2, so that the welding of the pole ears 300 and the steel shell 100 of a plurality of winding cores 200 can be realized, thereby improving the welding efficiency.
[0033] In the above embodiment, the first groove 4 on the base 11 is used to place the steel shell 100, and the second groove 5 on the placement seat 12 is used to place the winding core 200. It can be understood that in other embodiments, when the remaining structures and layouts remain unchanged, the height and diameter of the first groove 4 and the second groove 5 can be adjusted, so that the welding base can be suitable for winding cores 200 and steel shells 100 of different diameters and heights.
[0034] like Figures 1 to 4As shown, in some embodiments, the first guide groove 6 is inclined from top to bottom relative to the horizontal plane, and the second guide groove 7 is inclined from right to left relative to the vertical plane. The winding core 200 is placed in the second groove 5, and the position of the pole lug 300 is just opposite to the step structure 3. Since the first guide groove 6 is inclined from top to bottom relative to the horizontal line, the pole lug 300 can be inclined from the placement seat 12 toward the first groove 4 on the base 11. After the pole lug 300 enters the steel shell 100 after the first bending, since the second guide groove 7 on the welding clamp 2 is inclined from right to left relative to the vertical plane, when the welding clamp 2 presses down the end of the pole lug 300, the pole lug 300 can be tilted smoothly and bent for the second time, ensuring that the pole lug 300 is tightly fitted with the steel shell 100, and also ensuring that the position of the pole lug 300 fitting with the steel shell 100 is the same each time, ensuring the quality and consistency of welding.
[0035] like Figure 2 and Figure 4 As shown, in some embodiments, the first guide groove 6 intersects with the first groove 4, and the depth of the first guide groove 6 is deeper than the first groove 4. Since there is a certain gap between the tab 300 and the outer periphery of the winding core 200, the first guide groove 6 intersects with the first groove 4, so that the tab 300 can be accurately positioned on the first guide groove 6. Since the tab 300 is perpendicular to the winding core 200 and needs to be bent to fit with the first guide groove 6, and the tab 300 also has a certain thickness, designing the depth of the first guide groove 6 to be deeper than the first groove 4 can better ensure the flatness of the tab 300.
[0036] like Figure 2 and Figure 4 As shown, in some embodiments, the first guide groove 6 is rectangular, and the center line of the first guide groove 6 and the center line of the second guide groove 7 are on a straight line. The first guide groove 6 is rectangular and corresponds to the shape of the pole lug 300, and both sides of the first guide groove 6 and the second guide groove 7 are parallel to the pole lug 300, so that the pole lug 300 can be flatly embedded in the first guide groove 6 and the second guide groove 7, ensuring that the pole lug 300 will not deviate from the predetermined path during the welding process, effectively avoiding assembly errors, and improving the consistency and quality of the product. The center lines of the first guide groove 6 and the second guide groove 7 are on the same line as the center line of the steel shell 100, which can ensure that the pole lug 300 is automatically corrected to the center of the steel shell 100.
[0037] like Figures 1 to 3As shown, in some embodiments, the welding clamp 2 includes a first pressing rod 21 and a second pressing rod 22, the second pressing rod 22 is vertically connected to the first pressing rod 21, the first pressing rod 21 is used to press the winding core 200, and the second pressing rod 22 is used to press the pole ear 300 and the steel shell 100. The first pressing rod 21 presses the winding core 200 to ensure the stability of the winding core 200 during the welding process, thereby ensuring the stability of the pole ear 300, and the second pressing rod 22 is vertically connected to the first pressing rod 21, and the second pressing rod 22 is used to press the pole ear 300 and the steel shell 100, ensuring that the welded part of the pole ear 300 is tightly connected to the steel shell 100, thereby ensuring the welding quality.
[0038] like Figures 1 to 3 As shown, in some embodiments, the second guide groove 7 is provided on the arc surface of the second pressure rod 22, and the first section 221 and the second section 222 are formed on both sides of the second guide groove 7 in the same inclination direction as the second guide groove 7. The second guide groove 7 can ensure the stability of the pole tab 300 during the welding process. When the second pressure rod 22 is pressed down, the pole tab 300 is pressed to the bottom of the second pressure rod 22 along the inclined path guided by the second guide groove 7. The first section 221 and the second section 222 are formed on both sides of the second guide groove 7 in the same inclination direction as the second guide groove 7, so as to avoid the protrusions on both sides from scratching the pole tab 300 and causing damage to the pole tab 300 after the second groove 5 is processed on the arc surface, so as to ensure the processing quality.
[0039] like Figures 1 to 3 As shown, in some embodiments, a welding hole 8 is formed on the welding clamp 2, which passes through the first pressure rod 21 and the second pressure rod 22. The second pressure rod 22 is pressed on the pole tab 300 and the steel shell 100, and the laser beam of laser welding can pass through the first pressure rod 21 and the second pressure rod 22 to the position of the pole tab 300 through the welding hole 8, thereby realizing laser welding of the pole tab 300 and the steel shell 100. Under the pressure of the second pressure rod 22, the situation of poor contact between the pole tab 300 and the steel shell 100 and the resulting cold welding of the pole tab 300 is avoided.
[0040] like Figure 1 and Figure 2 As shown, in some embodiments, the first groove 4 is formed with a first step surface 121 and a second step surface 31. After the first groove 4 is formed in the placement seat 12, the first step surface 121 and the second step surface 31 are formed on the periphery of the first groove 4, the first step surface 121 is located on the placement seat 12, and the second step surface 31 is located on the step structure 3, so as to ensure that the tab 300 can be guided to the first groove 4.
[0041] like Figure 1 and Figure 4As shown, in some embodiments, the second groove 5 is cylindrical, and a circular third groove 9 is provided at the bottom of the second groove 5. The bottom of the cylindrical battery steel shell 100 has a convex structure, and the steel shell 100 is embedded in the cylindrical second groove 5, and the convex structure is just located in the third groove 9, thereby ensuring the stability of the steel shell 100 during welding and improving the quality of welding.
[0042] like Figure 1 and Figure 4 As shown, in some embodiments, the base 11, the step structure 3 and the peripheral side of the placement seat 12 are all provided with a chamfer structure 10. The chamfer structure 10 can reduce sharp edges and corners, thereby reducing the possibility of scratching the steel shell 100, the winding core 200 and the tab 300, and improving the production quality.
[0043] The utility model relates to a working principle and process of a cylindrical battery tab welding fixture. The steel shell 100 is placed in the first groove 4, the winding core 200 is placed in the second groove 5 of the placement seat 12, the first pressure rod 21 of the welding clamp 2 presses the winding core 200, and the second pressure rod 22 presses the tab 300 downward. The tab 300 is tilted toward the first groove 4 on the base 11 along the first guide groove 6, and then passes through the second guide groove 7 on the welding clamp 2 to make the tab 300 tilted smoothly and bend for the second time, and the tab 300 after the second bend can fit smoothly with the steel shell 100.
[0044] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0045] 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 one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0046] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0047] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.
Claims
1. A cylindrical battery tab welding jig, characterized in that: It includes a jig base and a welding clamp, the jig base includes a base and a placement seat, the placement seat is provided with a step structure, the step structure is connected to the base, the base is provided with a first groove for placing a steel shell, the placement seat is provided with a second groove for placing a winding core, the step structure is provided with a first guide groove, the welding clamp is provided with a second guide groove, the first guide groove and the second guide groove are used to guide the pole ear.
2. The cylindrical battery tab welding jig according to claim 1, characterized in that: The first guide groove is inclined from top to bottom relative to a horizontal plane, and the second guide groove is inclined from right to left relative to a vertical plane.
3. The cylindrical battery tab welding jig according to claim 1, characterized in that: The first guide groove intersects with the first groove, and the depth of the first guide groove is deeper than that of the first groove.
4. The cylindrical battery tab welding jig according to claim 1, characterized in that: The first guide groove is rectangular, and a center line of the first guide groove and a center line of the second guide groove are on a straight line.
5. The cylindrical battery tab welding jig according to claim 1, characterized in that: The welding clamp block comprises a first pressing rod and a second pressing rod, wherein the first pressing rod is vertically connected to the second pressing rod, the first pressing rod is used for pressing the winding core, and the second pressing rod is used for pressing the pole ear and the steel shell.
6. The cylindrical battery tab welding jig according to claim 5, characterized in that: The second guide groove is arranged on the arc surface of the second pressure rod, and a first cross section and a second cross section having the same inclination direction as the second guide groove are formed on both sides of the second guide groove.
7. The cylindrical battery tab welding jig according to claim 6, characterized in that: The welding clamp block is provided with a welding hole penetrating the first pressure rod and the second pressure rod.
8. The cylindrical battery tab welding jig according to claim 1, characterized in that: A first step surface and a second step surface are formed on both sides of the first groove.
9. The cylindrical battery tab welding jig according to claim 1, characterized in that: The second groove is cylindrical, and a circular third groove is provided at the bottom of the second groove.
10. The cylindrical battery tab welding jig according to claim 1, characterized in that: The circumferential sides of the base, the step structure and the placement seat are all provided with chamfered structures.