A packaging head for a lithium-ion battery cell
By setting a bevel and a heat insulation layer at the R-corner of the lithium-ion cell packaging head, the problem of aluminum-plastic film damage caused by heat radiation of the packaging head is solved, ensuring the insulation performance and structural stability of the cell.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHOU EVE UNITED ENERGY CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-06-30
AI Technical Summary
In the corner packaging process of existing lithium-ion cells, heat radiation from the R-corner of the end cap can cause damage to the aluminum-plastic film, leading to poor insulation.
Design a lithium-ion battery cell packaging head, which adopts an obtuse R-angle and is equipped with a bevel and a heat insulation layer to avoid heat radiation damage to the aluminum-plastic film. The heat insulation layer at the R-angle reduces the impact of heat radiation.
This effectively avoids damage to the aluminum-plastic film caused by heat radiation at the R-corner position, ensuring the insulation performance of the battery cell and preventing damage and displacement deformation at the corner of the battery cell.
Smart Images
Figure CN224437626U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery cell packaging technology, and in particular to a packaging head for a lithium-ion battery cell. Background Technology
[0002] Packaging of pouch cells is the most crucial step in cell molding. Currently, pouch cells are encapsulated using aluminum-plastic film, with the inner layer of the film made of PP. The film adheres to the cell after reaching its melting point when heated. After the top side is sealed, a corner pre-seal is performed at the bottom to prevent damage to the corners. Effective corner sealing helps prevent leakage and displacement / deformation during molding. The corner sealing head typically includes an upper sealing head with an upper encapsulation portion and a lower sealing head opposite the upper one. The top-side-sealed cell is placed between the upper and lower encapsulation portions for corner heat sealing. However, during corner sealing, the radius (R) of the sealing head can generate heat radiation, causing damage to the PP layer and resulting in poor insulation. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a packaging head for lithium-ion cells.
[0004] The objective of this utility model is achieved through the following technical solution:
[0005] A lithium-ion battery cell packaging head includes an upper head and a lower head, the lower head being located below the upper head. Two corner packaging portions are spaced apart on both the upper and lower heads. The orthographic projection of each corner packaging portion is L-shaped, and an obtuse angle (R-angle) is formed between two adjacent L-shaped surfaces of the corner packaging portion. A receiving groove for accommodating the battery cell is formed between the two corner packaging portions, and the battery cell is placed between the two corner packaging portions of the upper and lower heads.
[0006] In one embodiment, the distance between the two corner package portions is adapted to the width of the battery cell.
[0007] In one embodiment, the corner encapsulation portion has a length of 5mm-8.5mm and a width of 12mm-22mm.
[0008] In one embodiment, the R-angle is in the range of 105°-120°.
[0009] In one embodiment, the R-angle has a bevel that is inclined from the end face of the corner package to the side near the receiving groove.
[0010] In one embodiment, the end face width of the corner packaging portion is 11mm, and the horizontal width of the inclined surface is 10mm.
[0011] In one embodiment, the R-corner surface is provided with a heat insulation layer, which is used to reduce the heat radiation from the corner packaging portion to the battery cell during packaging.
[0012] In one embodiment, the insulation layer is either rock wool or glass fiber.
[0013] In one embodiment, the thickness of the insulation layer is 10um-120um.
[0014] In one embodiment, a mounting base is further included, wherein the upper end cap and the lower end cap are disposed opposite to each other on the mounting base.
[0015] Compared with the prior art, the present invention has at least the following advantages:
[0016] 1. The encapsulation head of a lithium-ion battery cell of this utility model encapsulates the corner position of the battery cell by setting a corner encapsulation part, and the corner encapsulation part is provided with an R-angle with a bevel to avoid the aluminum-plastic film at the corner position of the battery cell, so as to avoid heat radiation at the R-angle position from damaging the PP layer of the aluminum-plastic film and causing poor insulation of the battery cell.
[0017] 2. The encapsulation head of a lithium-ion battery cell of this utility model has a heat insulation layer at the R-corner to insulate the R-corner position and prevent heat radiation from the R-corner position from damaging the aluminum-plastic film of the battery cell. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.
[0019] Figure 1 A schematic diagram of the structure of a lithium-ion battery cell packaging head provided by this utility model;
[0020] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle.
[0021] Figure descriptions: 10, upper end cap; 20, lower end cap; 30, corner sealing part; 31, radius (R-angle); 311, bevel; 32, receiving groove; 40, heat insulation layer; 50, mounting base. Detailed Implementation
[0022] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.
[0023] A packaging head for a lithium-ion battery cell, as shown in the reference. Figure 1 The device includes an upper end cap 10 and a lower end cap 20, with the lower end cap 20 located below the upper end cap 10. Two corner encapsulation portions 30 are spaced apart on both the upper and lower end caps 10. The projected surface of each corner encapsulation portion 30 is L-shaped, and an R-angle 31 is formed between two adjacent L-shaped surfaces. A receiving groove 32 for accommodating the battery cell is formed between the two corner encapsulation portions 30. The battery cell is placed between the two corner encapsulation portions 30 of the upper and lower end caps 10, and the upper and lower end caps 10 are aligned and pressed together to encapsulate the corners of the battery cell. The R-angle 31 is set at an obtuse angle to avoid the angle being too small and contacting the aluminum-plastic film at the corner of the battery cell, thus preventing damage to the PP layer.
[0024] Reference Figure 1 The distance between the two corner sealing portions 30 is adapted to the width of the battery cell, so that the two corner sealing portions 30 are located at the two corner edges of the battery cell, so as to seal the unsealed area at the corner of the battery cell. When sealing the corner of the battery cell, the battery cell is placed between the two corner sealing portions 30 of the upper end cap 10 and the lower end cap 20, so that the corner sealing portions 30 of the upper end cap 10 and the lower end cap 20 are located at the edge of the corner of the battery cell, and the upper end cap 10 and the lower end cap 20 are aligned to seal the corner of the battery cell. It should be noted that both the upper end cap 10 and the lower end cap 20 are provided with a driving component for controlling the movement of the upper end cap 10 and the lower end cap 20. The driving component is a cylinder, which is not shown in the figure.
[0025] Furthermore, referring to Figure 1 The corner encapsulation part 30 has a length of 5mm-8.5mm and a width of 12mm-22mm.
[0026] Furthermore, referring to Figure 1 and Figure 2 The radius (R) angle 31 is obtuse, with an angle range of 105°-120°. The radius (R) angle 31 has a bevel 311, which is inclined from the end face of the corner encapsulation portion 30 to the side near the receiving groove 32. The end face width of the corner encapsulation portion 30 is 11mm, and the horizontal width of the bevel 311 is 10mm. By providing the bevel 311, the aluminum-plastic film at the corner of the battery cell is avoided, preventing heat radiation at the radius (R) angle 31 from damaging the PP layer of the aluminum-plastic film and causing poor insulation of the battery cell.
[0027] Furthermore, referring to Figure 1 and Figure 2 The surface of the R-corner 31 is provided with a heat insulation layer 40. The heat insulation layer 40 is used to reduce the heat radiation of the R-corner 31 to the aluminum-plastic film when the corner encapsulation part 30 encapsulates the corner of the battery cell.
[0028] Furthermore, referring to Figure 1 and Figure 2 The insulation layer 40 is made of either rock wool or fiberglass. By using insulation materials to make the insulation layer 40, the R-angle 31 position is insulated.
[0029] Furthermore, referring to Figure 1 and Figure 2 The thickness of the insulation layer 40 is 10um-120um.
[0030] Reference Figure 1 In this utility model, a mounting base 50 is also included. The upper end cap 10 and the lower end cap 20 are arranged opposite to each other on the mounting base 50. Both the upper end cap 10 and the lower end cap 20 are provided with screw holes for mounting onto the mounting base 50.
[0031] This utility model encapsulates the corner position of the battery cell by setting a corner encapsulation part 30, and the corner encapsulation part 30 is provided with an R-corner 31 with a bevel 311. A heat insulation layer 40 is provided at the R-corner 31 to avoid the aluminum-plastic film at the corner position of the battery cell and to insulate the R-corner 31 position, so as to prevent heat radiation from the R-corner 31 position from damaging the PP layer of the aluminum-plastic film and causing poor insulation of the battery cell.
[0032] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A packaging head for a lithium-ion battery cell, characterized in that, include: The upper end cap (10) and the lower end cap (20) are located below the upper end cap (10). Two corner encapsulation parts (30) are respectively provided on the upper end cap (10) and the lower end cap (20). The orthographic projection surface of the corner encapsulation part is L-shaped. An R-angle (31) is formed between two adjacent surfaces of the L-shape of the corner encapsulation part (30). The R-angle (31) is obtuse. A receiving groove (32) for accommodating the battery cell is formed between the two corner encapsulation parts (30). The battery cell is placed between the two corner encapsulation parts (30) of the upper end cap (10) and the lower end cap (20).
2. The packaging head for a lithium-ion battery cell according to claim 1, characterized in that, The distance between the two corner package portions (30) is adapted to the width of the battery cell.
3. The packaging head for a lithium-ion battery cell according to claim 1, characterized in that, The corner encapsulation part (30) has a length of 5mm-8.5mm and a width of 12mm-22mm.
4. The packaging head for a lithium-ion battery cell according to claim 1, characterized in that, The R angle (31) has an angle range of 105°-120°.
5. The packaging head for a lithium-ion battery cell according to claim 4, characterized in that, The R-angle (31) has a slope (311) that is inclined from the end face of the corner encapsulation part (30) to the side near the receiving groove (32).
6. The packaging head for a lithium-ion battery cell according to claim 5, characterized in that, The end face width of the corner encapsulation part (30) is 11mm, and the horizontal width of the inclined surface (311) is 10mm.
7. The packaging head for a lithium-ion battery cell according to claim 1, characterized in that, The surface of the R-corner (31) is provided with a heat insulation layer (40), which is used to reduce the heat radiation of the corner packaging part (30) to the battery cell during packaging.
8. The packaging head for a lithium-ion battery cell according to claim 7, characterized in that, The insulation layer (40) is either rock wool or glass fiber.
9. The packaging head for a lithium-ion battery cell according to claim 8, characterized in that, The thickness of the heat insulation layer (40) is 10um-120um.
10. The packaging head for a lithium-ion battery cell according to claim 1, characterized in that, It also includes a mounting base (50), on which the upper end cap (10) and the lower end cap (20) are disposed opposite to each other.