Lithium battery roll core diaphragm hot ironing shaping mechanism
By designing the lithium battery core diaphragm hot-skin shaping mechanism, using structures such as plastic surface and iron needle, the problems of deformation of the central hole and damage to the extreme ear during the lithium battery core shaping process are solved, and the effect of flatness and high consistency of the end of the core is achieved.
Patent Information
- Application Number
- CN202421376553.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-06-17
AI Technical Summary
During the plastic shaping process of lithium battery core, the central hole of the core may deform, and the plastic shaping process may easily damage the extreme ear.
A lithium battery core diaphragm hot-sculpting mechanism is designed, including a first plastic body and a second plastic body, which abuts the end surface of the core through the first plastic surface and the second plastic surface, and applies a squeeze pressure to make the diaphragm fall toward the central hole; a vacancy is designed to avoid damage to the electrode, and a hot hole needle and a butt hole are provided on the plastic surface, and the hot hole needle supports the central hole to prevent deformation.
The ends of the coil core are flat, highly meet the design requirements and have good consistency, avoiding deformation of the central hole and damage to the extreme ear.
Smart Images
Figure CN222883602U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium batteries, in particular to a hot-ironing and shaping mechanism for a lithium battery core diaphragm. Background Art
[0002] Lithium batteries are widely used in electronic devices in various fields of life due to their high energy density and long service life. The structure of lithium batteries includes a core and a shell that encapsulates the core. After the positive electrode sheet, negative electrode sheet and diaphragm are wound to form a core, the ends of the core need to be shaped so that the ends of the core remain flat and do not exceed the surface of the shell after being installed in the shell, which is convenient for welding. In addition, the height of the core after shaping must meet the design requirements and maintain good consistency. In the prior art, shaping is performed by squeezing the end face of the core through a shaping device, but the center hole of the core may be deformed after shaping, and the pole ear is easily damaged during the shaping process. Utility Model Content
[0003] In view of the above-mentioned problems, the purpose of the utility model is to provide a lithium battery core diaphragm hot stamping and shaping mechanism to solve the problems of deformation of the core center hole and damage to the tabs during the shaping of the lithium battery core.
[0004] The purpose of the utility model is achieved through the following technical solutions:
[0005] A hot-ironing and shaping mechanism for a lithium battery core diaphragm comprises a first shaping body and a second shaping body; the first shaping body comprises a first shaping surface, a first avoidance position and a perforation needle, the first shaping surface is located at the end of the first shaping body, the perforation needle is connected to the first shaping surface, and the first avoidance position is arranged on the side of the first shaping body; the second shaping body comprises a second shaping surface and a second avoidance position, the second shaping surface is located at the end of the second shaping body, a docking hole is arranged on the second shaping surface, the second avoidance position is arranged on the side of the second shaping body, and the first shaping surface and the second shaping surface are arranged opposite to each other.
[0006] The utility model lithium battery core diaphragm hot-stamping shaping mechanism is applied to the shaping of both ends of the core. The first shaping surface and the second shaping surface are abutted against the end surface of the core to be shaped, and a certain extrusion force is applied to make the core diaphragm fall down in an orderly and neat manner toward the center hole of the core. The first avoidance position and the second avoidance position are designed. The size of the avoidance position is larger than the size of the core ear and is consistent with the position direction of the ear to ensure that the ear is not affected by the extrusion of the shaping body during the shaping and extrusion process, thereby avoiding damage to the ear. A hot-stamping needle is designed on the first shaping surface, and a docking hole is designed on the second shaping surface. During the shaping process, the hot-stamping needle is inserted into the center hole of the core. The hot-stamping needle plays a supporting role in the center hole to avoid deformation of the center hole due to extrusion during the shaping process, thereby ensuring that the welding of the ear through the center hole after the shaped core is put into the shell is not affected. The core shaped by the hot-stamping shaping mechanism for lithium battery core diaphragms of this scheme has flat ends at both ends, and the height of the core meets the design requirements and has good consistency.
[0007] Furthermore, the perforation needle is located at the center of the first shaping surface, the docking hole is located at the center of the second shaping surface, and the perforation needle is coaxial with the docking hole.
[0008] The perforation needle and the docking hole are respectively located at the center of the first shaping surface and the second shaping surface and maintain the same axis. After passing through the center hole of the core, the perforation needle can extend into the docking hole, so that the perforation needle can completely cover the center hole of the core and shape the center hole evenly.
[0009] Furthermore, one end of the perforating needle facing the second shaping surface is conical.
[0010] The end of the perforation needle is designed to be conical, which is convenient for the perforation needle to extend into the central hole and the docking hole of the roll core.
[0011] Furthermore, the diameter of the docking hole is larger than the diameter of the perforating needle.
[0012] The diameter of the docking hole is larger than the diameter of the perforating needle, ensuring that the perforating needle can be inserted into the docking hole without interference. At the same time, if the perforating needle undergoes a slight deformation, the docking hole can also be compatible with the perforating needle.
[0013] Furthermore, a heating element is provided inside the first shaping body and the second shaping body.
[0014] By setting a heating element to heat the first shaping body and the second shaping body, the first shaping surface, the perforating needle and the second shaping surface are kept at a higher temperature, and the two end surfaces of the core are hot pressed, so that the core diaphragm can be better lodged toward the center hole, ensuring that the end surface of the core is flat. At the same time, the heated perforating needle is used to shape the center hole of the core, so that the center hole of the core is fixed.
[0015] Furthermore, it also includes a first connecting shaft and a second connecting shaft, wherein the first connecting shaft is connected to the first shaped body, and the second connecting shaft is connected to the second shaped body.
[0016] The first shaping body and the second shaping body are detachably connected to other mechanism components through the first connecting shaft and the second connecting shaft respectively, and are designed into a detachable structure, which is convenient for disassembly and installation when components need to be replaced.
[0017] Furthermore, the diameter of the first connecting shaft is smaller than the diameter of the first shaped body, and a first step structure is formed at the connection between the first connecting shaft and the first shaped body; the diameter of the second connecting shaft is smaller than the diameter of the second shaped body, and a second step structure is formed at the connection between the second connecting shaft and the second shaped body.
[0018] A first step structure is designed at the connection between the first connecting shaft and the first shaped body, and a second step structure is designed at the connection between the second connecting shaft and the second shaped body, which play a positioning and blocking role when connected with other mechanism components.
[0019] Furthermore, it also includes a driving component, the first connecting shaft and the second connecting shaft are installed on the driving component, and the driving component can drive the first shaping body and the second shaping body to move closer to or away from each other.
[0020] The driving assembly is controlled to drive the first shaping body and the second shaping body to approach each other and make hot pressing contact with the winding core. At the same time, the hot pressing time is controlled so that the flatness of the end of the winding core can meet the design requirements and the diaphragm does not rebound or warp. After the shaping is completed, the first shaping body and the second shaping body are driven away from each other to end the hot pressing process.
[0021] Compared with the prior art, the beneficial effects of the utility model are:
[0022] The utility model lithium battery core diaphragm hot-stamping shaping mechanism is applied to the shaping of both ends of the core. The first shaping surface and the second shaping surface are abutted against the end surface of the core to be shaped, and a certain extrusion force is applied to make the core diaphragm fall down in an orderly and neat manner toward the center hole of the core. The first avoidance position and the second avoidance position are designed. The size of the avoidance position is larger than the size of the core ear and is consistent with the position direction of the ear to ensure that the ear is not affected by the extrusion of the shaping body during the shaping and extrusion process, thereby avoiding damage to the ear. A hot-stamping needle is designed on the first shaping surface, and a docking hole is designed on the second shaping surface. During the shaping process, the hot-stamping needle is inserted into the center hole of the core. The hot-stamping needle plays a supporting role in the center hole to avoid deformation of the center hole due to extrusion during the shaping process, thereby ensuring that the welding of the ear through the center hole after the shaped core is put into the shell is not affected. The core shaped by the hot-stamping shaping mechanism for lithium battery core diaphragms of this scheme has flat ends at both ends, and the height of the core meets the design requirements and has good consistency. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a structural diagram of a lithium battery core diaphragm hot-stamping and shaping mechanism according to an embodiment of the utility model.
[0024] Figure 2 This is a structural diagram of the first shaping body of an embodiment of the utility model.
[0025] Figure 3 This is a step structure diagram of the second connecting shaft of an embodiment of the utility model.
[0026] Illustrations: 1-first shaping body, 2-second shaping body, 3-first connecting axis, 4-second connecting axis, 5-winding core, 11-first shaping surface, 12-perforation needle, 13-first avoidance position, 21-second shaping surface, 22-docking hole, 23-second avoidance position, 31-first step structure, 41-second step structure. DETAILED DESCRIPTION
[0027] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.
[0028] like Figures 1 to 3 As shown, in a preferred embodiment, the utility model provides a lithium battery core diaphragm hot stamping and shaping mechanism, comprising a first shaping body 1 and a second shaping body 2; the first shaping body 1 comprises a first shaping surface 11, a first avoidance position 13 and a perforation needle 12, the first shaping surface 11 is located at the end of the first shaping body 1, the perforation needle 12 is connected to the first shaping surface 11, and the first avoidance position 13 is arranged on the side of the first shaping body 1; the second shaping body 2 comprises a second shaping surface 21 and a second avoidance position 23, the second shaping surface 21 is located at the end of the second shaping body 2, a docking hole 22 is provided on the second shaping surface 21, the second avoidance position 23 is arranged on the side of the second shaping body 2, and the first shaping surface 11 and the second shaping surface 21 are arranged opposite to each other.
[0029] The hot-stamping and shaping mechanism of the lithium battery core membrane of the utility model is applied to the shaping of the two ends of the core 5. The first shaping surface 11 and the second shaping surface 21 are in contact with the end surface of the core 5 to be shaped, and a certain extrusion force is applied to make the core membrane fall down in an orderly and neat manner toward the central hole of the core 5. The first avoidance position 13 and the second avoidance position 23 are designed. The size of the avoidance position is larger than the size of the pole ear of the core 5 and is consistent with the position direction of the pole ear, so as to ensure that the pole ear is not affected by the extrusion of the shaping body during the shaping and extrusion process, and the pole ear is prevented from being damaged. The hot-stamping needle 12 is designed on the first shaping surface 11, and the docking hole 22 is designed on the second shaping surface 21. During the shaping process, the hot-stamping needle 12 extends into the central hole of the core 5 to shape the central hole of the core 5. At the same time, the hot-stamping needle 12 plays a supporting role in the central hole of the core 5, so as to avoid deformation of the central hole due to extrusion during the shaping process, and ensure that the welding of the pole ear through the central hole after the shaped core 5 is put into the shell is not affected. The core 5 shaped by the lithium battery core diaphragm hot-stamping shaping mechanism of the present invention has flat ends at both ends, and the height of the core 5 meets the design requirements and has good consistency.
[0030] like Figure 1 and Figure 2 As shown, the perforation needle 12 is located at the center of the first shaping surface 11, and the docking hole 22 is located at the center of the second shaping surface 21. The end of the perforation needle 12 facing the second shaping surface 21 is conical, and the aperture of the docking hole 22 is larger than the diameter of the perforation needle 12. The perforation needle 12 and the docking hole 22 are coaxial, and the perforation needle 12 can extend into the docking hole 22 after passing through the center hole of the winding core 5, so that the perforation needle 12 can completely cover the center hole of the winding core 5, so that the center hole is shaped evenly. The end of the perforation needle 12 is designed to be conical, which is conducive to the perforation needle 12 extending into the center hole of the winding core 5 and the docking hole 22. The aperture of the docking hole 22 is larger than the diameter of the perforation needle 12, ensuring that the perforation needle 12 can extend into the docking hole 22 without interference. At the same time, if the perforation needle 12 is slightly deformed, the docking hole 22 can also accommodate the perforation needle 12.
[0031] like Figure 1 As shown, a heating element (not shown in the figure) is provided inside the first shaping body 1 and the second shaping body 2. The heating element adopts the existing technology, such as a heating wire, a heating rod, etc. The heating element is provided to heat the first shaping body 1 and the second shaping body 2, so that the first shaping surface 11, the perforating needle 12 and the second shaping surface 21 are at a higher temperature, and the two end surfaces of the core 5 are hot pressed, so that the core diaphragm can be better lodged toward the center hole, ensuring that the end surface of the core 5 is flat. At the same time, the heated perforating needle 12 is used to shape the center hole so that the center hole is fixed.
[0032] like Figure 1 and Figure 3As shown, the first connecting shaft 3 is connected to the end of the first shaping body 1, the diameter of the first connecting shaft 3 is smaller than the diameter of the first shaping body 1, and a first step structure 31 is formed at the connection; the second connecting shaft is connected to the end of the second shaping body, the diameter of the second connecting shaft is smaller than the diameter of the second shaping body, and a second step structure 41 is formed at the connection. The first connecting shaft 3 and the second connecting shaft 4 are installed in a driving assembly (not shown in the figure), and the driving assembly adopts existing technology, such as a servo motor driving assembly. The first shaping body 1 and the second shaping body 2 are detachably connected to the connecting parts of the driving assembly through the first connecting shaft 3 and the second connecting shaft 4, respectively, and are designed to be a detachable structure, which is convenient for disassembly and installation when parts need to be replaced. The first step structure 31 and the second step structure 41 play a positioning and blocking role when connected to the connecting parts of the driving assembly. The driving assembly is controlled to drive the first shaping body 1 and the second shaping body 2 to approach each other and make hot pressing contact with the end surface of the winding core 5. At the same time, the hot pressing time is controlled so that the flatness of the end of the winding core 5 can meet the design requirements and the diaphragm does not rebound or warp. After the shaping is completed, the first shaping body 1 and the second shaping body 2 are driven away from each other to end the hot pressing process.
[0033] 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.
[0034] In addition, the terms "first", "second", etc. 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 definition of "first", "second", etc. 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.
[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A lithium battery core membrane hot blanching and shaping mechanism, characterized in that: It includes a first shaping body and a second shaping body; the first shaping body includes a first shaping surface, a first avoidance position and a perforation needle, the first shaping surface is located at the end of the first shaping body, the perforation needle is connected to the first shaping surface, and the first avoidance position is arranged on the side of the first shaping body; the second shaping body includes a second shaping surface and a second avoidance position, the second shaping surface is located at the end of the second shaping body, a docking hole is arranged on the second shaping surface, the second avoidance position is arranged on the side of the second shaping body, and the first shaping surface and the second shaping surface are arranged opposite to each other.
2. The lithium battery core membrane hot-stamping and shaping mechanism according to claim 1, characterized in that: The perforation needle is located at the center of the first shaping surface, the docking hole is located at the center of the second shaping surface, and the perforation needle is coaxial with the docking hole.
3. The lithium battery core membrane hot blanching and shaping mechanism according to claim 2, characterized in that: One end of the perforating needle facing the second shaping surface is conical.
4. The lithium battery core membrane hot blanching and shaping mechanism according to claim 3, characterized in that: The diameter of the docking hole is larger than the diameter of the perforating needle.
5. The lithium battery core membrane hot-stamping and shaping mechanism according to claim 1, characterized in that: A heating element is disposed inside the first shaping body and the second shaping body.
6. The lithium battery core membrane hot blanching and shaping mechanism according to any one of claims 1 to 5, characterized in that: It also includes a first connecting shaft and a second connecting shaft, wherein the first connecting shaft is connected to the first shaped body, and the second connecting shaft is connected to the second shaped body.
7. The lithium battery core membrane hot-stamping and shaping mechanism according to claim 6, characterized in that: The diameter of the first connecting shaft is smaller than the diameter of the first shaped body, and a first step structure is formed at the connection between the first connecting shaft and the first shaped body; the diameter of the second connecting shaft is smaller than the diameter of the second shaped body, and a second step structure is formed at the connection between the second connecting shaft and the second shaped body.
8. The lithium battery core membrane hot-stamping and shaping mechanism according to claim 7, characterized in that: It also includes a driving assembly, the first connecting shaft and the second connecting shaft are installed on the driving assembly, and the driving assembly can drive the first shaping body and the second shaping body to move closer to or away from each other.