Tab shaping tool
During the manufacturing process of lithium-ion batteries, the tab shaping tooling uses a pressure plate assembly and a push-pushing structure to press out bending marks at the root of the tab, solving the problem of uncontrollable bending position of the tab and ensuring the stability of the tab and the safety of the battery.
Patent Information
- Application Number
- CN202422550863.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-10-22
AI Technical Summary
During the manufacturing process of lithium-ion batteries, the bending position of the tabs cannot be controlled, resulting in tab redundancy, affecting the battery's charge and discharge performance, and the roots of the tabs may diverge or be inserted upside down into the battery cell, causing a short circuit.
A tab shaping tool is provided, which presses a bending indentation at the root of the tab and uses left and right pressure plate assemblies and a push structure to control the bending of the tab at the root, avoids redundancy and divergence, and prevents the tab from being inserted upside down.
Effectively control the bending position of the tab, ensure the quality of the core assembly, prevent redundancy and internal short circuit at the root of the tab, and improve battery performance.
Smart Images
Figure CN223352611U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium ion battery manufacturing, in particular to a tab shaping tool. Background Art
[0002] There is a core-closing process in the manufacturing process of lithium-ion batteries. The core-closing process is simply to weld the paired AB cells to the cover connecting piece, and the AB cells are in a relative position during welding. Then the AB cells are bent downward at their tab positions so that the AB cells are rotated 90° around the cover connecting piece, and then tightly overlapped with each other, and finally the overlapped AB cells are inserted into the battery shell. This is a complete process flow.
[0003] However, in the process of bending the tab, since the bending position of the tab is uncontrollable, once the bending position of the tab is far away from the root, it will cause tab redundancy, affecting the charge and discharge performance of the battery; afterwards, when the tab is pressed down in the core-packing process (pressing down the cover plate connecting piece to make the cover plate connecting piece close to the battery cell), the redundant part of the tab root will be further pressed down and concave, causing the morphology of the tab root to diverge (such as Figure 1 As shown, the A1 section of the tab may spread apart under external force), and the root of the tab may be further inserted into the battery cell after the battery cell is placed in the shell, causing a short circuit inside the battery cell. Utility Model Content
[0004] The utility model provides a tab shaping tool, which presses a bending indentation at the root of the tab in advance so that the tab can be stably bent from the bending indentation at its root when the battery cell is assembled, so as to avoid the formation of redundancy at the root of the tab, thereby preventing the redundancy at the root of the tab from diverging due to pressure, and preventing the redundancy at the root of the tab from being inserted into the battery cell due to the downward pressure of the cover plate after the battery cell is placed in the shell, so as to solve the above-mentioned technical problems.
[0005] The technical solution of the utility model for solving the above-mentioned problem is: to provide a tab shaping tool, including an intermediate substrate, a left pressure plate assembly, a right pressure plate assembly, and a push structure. The bottoms of the left pressure plate assembly, the right pressure plate assembly, and the intermediate substrate are flush. The push structure is used to push the left pressure plate assembly and the right pressure plate assembly to slide outward from the intermediate substrate to a position close to the end face of the battery cell, thereby causing the left pressure plate assembly and the right pressure plate assembly to press out a bending mark at the root position of the tab of at least one battery cell to control the bending of the tab at the root.
[0006] Furthermore, the left pressure plate assembly includes a left slider and a left pressure plate, the left pressure plate is fixedly arranged on the left side of the bottom of the left slider, the lower surface of the left pressure plate is flush with the bottom of the intermediate substrate, and the left slider drives the left pressure plate to slide by sliding on the intermediate substrate; the right pressure plate assembly includes a right slider and a right pressure plate, the right pressure plate is fixedly arranged on the right side of the bottom of the right slider, the lower surface of the right pressure plate is flush with the bottom of the intermediate substrate, and the right slider drives the right pressure plate to slide by sliding on the intermediate substrate.
[0007] Furthermore, it also includes a left limiting slide groove opened on the left side of the intermediate base plate and used to accommodate the left pressure plate, and the left limiting slide groove is used to limit the left pressure plate to only be able to make linear reciprocating movements toward the left side of the intermediate base plate; it also includes a right limiting slide groove opened on the right side of the intermediate base plate and used to accommodate the right pressure plate, and the right limiting slide groove is used to limit the right pressure plate to only be able to make linear reciprocating movements toward the right side of the intermediate base plate.
[0008] Furthermore, strip slides are provided on the groove walls of the left limiting slide and the right limiting slide, the edge of the left pressure plate is slidably inserted into the strip slide of the left limiting slide, and the edge of the right pressure plate is slidably inserted into the strip slide of the right limiting slide, and the left pressure plate and the right pressure plate are both vertically limited by the strip slide.
[0009] Furthermore, the push structure includes a trapezoidal pressure block, a left push inclined surface provided on the left pressure plate assembly, and a right push inclined surface provided on the right pressure plate assembly. The inclined surfaces on both sides of the trapezoidal pressure block respectively cooperate with the left abutting inclined surface and the right abutting inclined surface, so that when the trapezoidal pressure block moves downward, the left pressure plate assembly is pushed to slide to the left and the right pressure plate assembly is pushed to slide to the right.
[0010] Furthermore, it also includes an elastic return member, which is connected to the left pressure plate assembly and the right pressure plate assembly at the same time, and the elastic return member is set to an elastically stretched state.
[0011] Furthermore, both the left pressure plate assembly and the right pressure plate assembly are provided with an accommodating groove for accommodating the elastic reset member.
[0012] Furthermore, the accommodating groove on the left pressure plate assembly is opened at the bottom of the left pushing inclined surface, and the accommodating groove on the right pressure plate assembly is opened at the bottom of the right pushing inclined surface. The upper end of the trapezoidal pressure block is also provided with a limit plate for limiting the downward pressing distance of the trapezoidal pressure block. The limit plate is used to block and limit each other with the left slider or the right slider to prevent the trapezoidal pressure block from being pressed downward to the elastic reset part.
[0013] Furthermore, a plurality of mounting holes are provided on the upper end surface of the trapezoidal pressing block, and the trapezoidal pressing block is fixedly mounted to an external driving device through the mounting holes so as to be driven by the external driving device to push the left pressure plate assembly and the right pressure plate assembly to slide.
[0014] Furthermore, the surfaces of the intermediate base plate, the left pressure plate assembly, and the right pressure plate assembly are all provided with an anti-rust coating.
[0015] Beneficial effects of the utility model:
[0016] The utility model provides a tab shaping tool, which is used in the process stage of ultrasonic welding of tabs and connecting pieces before core assembling. Before the ultrasonic welding in this stage, the technicians retract the left and right pressure plate assemblies to place the shaping tool between the two battery cells, and then use the push structure to move the left and right pressure plate assemblies outward from the middle substrate until they are respectively pressed against the end face of a battery cell, and then the entire shaping tool is pressed down to make the shaping tool form bending marks at the roots of the tabs of the two battery cells. When the battery cells are stacked and the tabs are bent in the core assembling process, the tabs can be bent from the pre-printed root indentation position to effectively control the bending position of the tabs and ensure the quality of core assembling. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all. Those skilled in the art can derive other drawings from these drawings without inventive effort.
[0018] Figure 1 Schematic diagram of the overall structure of the tab shaping tooling of this embodiment;
[0019] Figure 2 Schematic diagram of the battery cell structure when the tab is not bent at the root and the tab root diverges;
[0020] 1-middle base plate, 11-left limit slide, 12-right limit slide, 13-bar slide;
[0021] 21-left slider, 22-left pressure plate;
[0022] 31-right slider, 32-right pressure plate;
[0023] 41-trapezoidal pressing block, 42-left push inclined surface, 43-right push inclined surface, 44-limiting plate, 45-mounting hole;
[0024] 5- elastic reset member;
[0025] 6-accommodating groove;
[0026] A-ear, B-battery cell. DETAILED DESCRIPTION
[0027] In this specification, directional terms such as up, down, left, right, front, back, front, back, top, and bottom, which are mentioned or may be mentioned, are defined relative to the configurations shown in the accompanying drawings. The terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may vary depending on the location and usage of the component. Therefore, these or other directional terms should not be construed as restrictive.
[0028] See also Figure 1 A tab shaping tool according to a specific embodiment of the present invention includes an intermediate substrate 1, a left pressure plate assembly, a right pressure plate assembly, and a push structure. The bottoms of the left pressure plate assembly, the right pressure plate assembly, and the intermediate substrate 1 are flush. The push structure is used to push the left pressure plate assembly and the right pressure plate assembly to slide outward from the intermediate substrate 1 to a position close to the end face of the battery cell, thereby causing the left pressure plate assembly and the right pressure plate assembly to press out a bending mark at the root of the tab of at least one battery cell to control the bending of the tab at the root.
[0029] The tab shaping tool of this embodiment is used before the ultrasonic welding of the tabs to the cover plate connecting piece. Specifically, after the technicians relatively fix the two paired battery cells on both sides of the cover plate connecting piece and attach the tabs of the two paired battery cells to the cover plate connecting piece, they place the tab shaping tool of this embodiment between the two paired battery cells. At this time, the left and right pressure plate assemblies are both folded onto the intermediate substrate 1. Therefore, the width of the entire tab shaping tool will be smaller than the spacing between the two paired battery cells. At this time, the entire tab shaping tool can be easily placed between the two paired battery cells.
[0030] Furthermore, in this embodiment, a left limiting slide groove 11 for accommodating a left pressure plate 22 is provided on the left side of the intermediate base plate 1, and a strip slide groove 13 is provided on the front and rear groove walls of the left limiting slide groove 11. The left pressure plate assembly includes a left slider 21 and a left pressure plate 22. The left pressure plate 22 is integrally fixedly arranged in the middle left part of the bottom of the left slider 21. The front and rear ends of the left pressure plate 22 are respectively provided with sliding protrusions. The front and rear ends of the left pressure plate 22 are each slidably inserted into a strip slide groove 13 through the sliding protrusions, and the lower surface of the left pressure plate 22 is also flush with the lower surface of the intermediate base plate 1; moreover, the left slider 21 extends from the right side of the left pressure plate 22 and is supported by the intermediate base plate 1.
[0031] Similarly, a right limiting slide groove 12 for accommodating the right pressure plate 32 is opened on the right side of the intermediate base plate 1, and a strip slide groove 13 is also opened on the front and rear groove walls of the right limiting slide groove 12. The right pressure plate assembly includes a right slider 31 and a right pressure plate 32. The right pressure plate 32 is fixedly arranged in an integral manner in the middle of the left side of the bottom of the right slider 31. The front and rear ends of the right pressure plate 32 are respectively provided with sliding protrusions. The front and rear ends of the right pressure plate 32 are each slidably inserted into a strip slide groove 13 through the sliding protrusions, and the lower surface of the right pressure plate 32 is also flush with the lower surface of the intermediate base plate 1; moreover, the right slider 31 extends from the left side of the right pressure plate 32 and is supported by the intermediate base plate 1.
[0032] In this regard, after placing the tab shaping tooling of this embodiment between the two paired battery cells, technicians can use the push structure to simultaneously push the left pressure plate assembly and the right pressure plate assembly relatively away from each other, thereby moving the left pressure plate 22 to a position against the left end face of the battery cell, and the right pressure plate 32 to a position against the right end face of the battery cell. In this embodiment, a plate opening for exposing the tab and the cover plate connecting piece is also provided on the intermediate substrate 1. Therefore, when the left pressure plate 22 and the right pressure plate 32 are moved into place, technicians can control the ultrasonic welding equipment to press the entire tab shaping tooling downward, first making the left pressure plate 22 and the right pressure plate 32 each press out a bending indentation at the root position of the tab of a battery cell, and then using the ultrasonic welding equipment to weld and fix the tab and the cover plate connecting piece.
[0033] Furthermore, in this embodiment, in order to facilitate the simultaneous pressing of bending indentations at the roots of the tabs of two paired battery cells, the push structure includes a trapezoidal pressing block 41, a left push bevel 42 provided on the left pressure plate assembly, and a right push bevel 43 provided on the right pressure plate assembly. The trapezoidal pressing block 41 is arranged downward, and the left push bevel 42 has the same inclination angle as the left bevel of the trapezoidal pressing block 41, and the right push bevel 43 has the same inclination angle as the right bevel of the trapezoidal pressing block 41; and a plurality of mounting holes 45 are also provided at the upper end surface of the trapezoidal pressing block 41. The trapezoidal pressing block 41 is fixedly connected to the downward pressing welding end of the ultrasonic welding equipment through the mounting holes 45, bolts, and nuts, so that the operation of making bending indentations at the roots of the tabs can be completed by the ultrasonic welding equipment, and the ultrasonic welding equipment can immediately weld the tabs and cover connecting pieces of the battery cell after making the bending indentations, thereby improving the speed of battery cell assembly.
[0034] Furthermore, in this embodiment, an elastic return member 5 is also connected between the left pressure plate assembly and the right pressure plate assembly. The left end of the elastic return member 5 is fixedly connected to the bottom position of the left push inclined surface 42 of the left slider 21, and the right end of the elastic return member 5 is fixedly connected to the bottom position of the right push inclined surface 43 of the right slider 31, and the elastic return member 5 is always in an elastically stretched state.
[0035] In this regard, when the ultrasonic welding equipment drives the trapezoidal pressure block 41 to move upward and exit the area between the left slider 21 and the right slider 31, the elastic reset part 5 can correspondingly pull the left pressure plate assembly and the right pressure plate assembly through its own elastic force to automatically move toward the middle of the intermediate substrate 1 to close together, so that the overall width of the entire tab shaping tooling is restored to the initial value, so that the technicians can take out the tab shaping tooling.
[0036] In this embodiment, the elastic return member 5 is a spring. Furthermore, a receiving groove 6 for accommodating and protecting the elastic return member 5 is formed at the bottom of the left and right abutting inclined surfaces 42 and 43. Furthermore, stop plates 44 are integrally provided on the left and right sides of the top of the trapezoidal pressing block 41 to prevent the trapezoidal pressing block 41 from compressing the elastic return member 5 downward.
[0037] In addition, in order to prevent the tab shaping tooling of this embodiment from rusting and corroding, the surfaces of the intermediate substrate 1, the left pressure plate assembly, and the right pressure plate assembly are all provided with an anti-rust coating; for example, the anti-rust coating can be a chromium coating.
[0038] Any matters not mentioned above are applicable to the prior art.
[0039] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some of the technical features may be replaced with equivalents; and such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A tab shaping tool, characterized in that: The invention comprises an intermediate substrate (1), a left pressure plate assembly, a right pressure plate assembly, and a push structure. The bottoms of the left pressure plate assembly, the right pressure plate assembly, and the intermediate substrate (1) are flush with each other. The push structure is used to push the left pressure plate assembly and the right pressure plate assembly to slide outward from the intermediate substrate (1) to a position close to the end face of the battery cell, thereby causing the left pressure plate assembly and the right pressure plate assembly to press out a bending mark at the root position of the pole ear of at least one battery cell, so as to control the bending of the pole ear at the root.
2. The tab shaping tool according to claim 1, wherein: The left pressure plate assembly comprises a left slider (21) and a left pressure plate (22), wherein the left pressure plate (22) is fixedly arranged on the left side of the bottom of the left slider (21), and the lower surface of the left pressure plate (22) is flush with the bottom of the intermediate substrate (1), and the left slider (21) drives the left pressure plate (22) to slide by sliding on the intermediate substrate (1); the right pressure plate assembly comprises a right slider (31) and a right pressure plate (32), wherein the right pressure plate (32) is fixedly arranged on the right side of the bottom of the right slider (31), and the lower surface of the right pressure plate (32) is flush with the bottom of the intermediate substrate (1), and the right slider (31) drives the right pressure plate (32) to slide by sliding on the intermediate substrate (1).
3. The tab shaping tool according to claim 2, characterized in that: The invention also includes a left limiting slide groove (11) provided on the left side of the intermediate base plate (1) and used to accommodate the left pressure plate (22), and the left limiting slide groove (11) is used to limit the left pressure plate (22) to only be able to make linear reciprocating movements toward the left side of the intermediate base plate (1); and a right limiting slide groove (12) provided on the right side of the intermediate base plate (1) and used to accommodate the right pressure plate (32), and the right limiting slide groove (12) is used to limit the right pressure plate (32) to only be able to make linear reciprocating movements toward the right side of the intermediate base plate (1).
4. The tab shaping tool according to claim 3, characterized in that: The groove walls of the left limiting groove (11) and the right limiting groove (12) are both provided with strip grooves (13), the edge of the left pressure plate (22) is slidably inserted into the strip groove (13) of the left limiting groove (11), and the edge of the right pressure plate (32) is slidably inserted into the strip groove (13) of the right limiting groove (12), and the left pressure plate (22) and the right pressure plate (32) are both vertically limited by the strip grooves (13).
5. The tab shaping tool according to claim 1, wherein: The push structure comprises a trapezoidal pressing block (41), a left push inclined surface (42) provided on the left pressure plate assembly, and a right push inclined surface (43) provided on the right pressure plate assembly. The inclined surfaces on both sides of the trapezoidal pressing block (41) respectively cooperate with the left abutting inclined surface and the right abutting inclined surface, so that when the trapezoidal pressing block (41) moves downward, the left pressure plate assembly is pushed to slide to the left, and the right pressure plate assembly is pushed to slide to the right.
6. The tab shaping tool according to claim 5, characterized in that: It also includes an elastic reset member (5), which is connected to the left pressure plate assembly and the right pressure plate assembly at the same time, and the elastic reset member (5) is set to an elastically stretched state.
7. The tab shaping tool according to claim 6, characterized in that: Both the left pressure plate assembly and the right pressure plate assembly are provided with an accommodating groove (6) for accommodating the elastic reset member (5).
8. The tab shaping tool according to claim 7, characterized in that: The accommodating groove (6) on the left pressure plate assembly is provided at the bottom of the left push inclined surface (42), and the accommodating groove (6) on the right pressure plate assembly is provided at the bottom of the right push inclined surface (43). The upper end of the trapezoidal pressure block (41) is further provided with a limiting plate (44) for limiting the downward movement distance of the trapezoidal pressure block (41). The limiting plate (44) is used to block and limit each other with the left slider (21) or the right slider (31) to prevent the trapezoidal pressure block (41) from being pressed downward onto the elastic reset member (5).
9. The tab shaping tool according to claim 5, characterized in that: The upper end surface of the trapezoidal pressing block (41) is further provided with a plurality of mounting holes (45), and the trapezoidal pressing block (41) is fixedly mounted on an external driving device through the mounting holes (45), so as to be driven by the external driving device to push the left pressing plate assembly and the right pressing plate assembly to slide.
10. The tab shaping tool according to claim 1, wherein: The surfaces of the intermediate base plate (1), the left pressure plate assembly, and the right pressure plate assembly are all provided with an anti-rust coating.