Lithium ion battery plastic laser welding auxiliary device
By using lithium-ion battery plastic laser welding auxiliary devices in the manufacturing of lithium battery PACK, uniform welding of the upper cover and the lower box is achieved, which solves the problem of poor sealing effect caused by the existing sealing process, and improves welding efficiency and sealing airtightness.
Patent Information
- Application Number
- CN202421565827.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-03
AI Technical Summary
During the manufacturing process of the square lithium battery PACK, the existing sealing adhesive bonding process leads to poor sealing effects between the upper cover and the lower box, and the leakage rate of the battery pack cannot be effectively controlled, affecting the PACK function and safety.
The lithium-ion battery plastic laser welding auxiliary device is adopted, and the upper cover profiling downpression module and mirror reflector module are used to achieve uniform welding of the upper cover and the lower box to ensure the airtightness of the sealing box.
Through laser welding auxiliary devices, malfunctions during manual positioning and welding process are reduced, welding efficiency and sealing airtightness are improved, and the number of rework is reduced.
Smart Images
Figure CN222819573U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium ion battery PACK manufacturing, in particular to a lithium ion battery plastic laser welding auxiliary device. Background Art
[0002] With the country's support and promotion of environmentally friendly new energy development, actively developing new energy vehicles is the future development direction of the automotive industry, and lithium battery technology is one of the key technologies for the development of electric vehicles. In the production process of square lithium battery PACK, the sealing process control of the box is a key process. The leakage rate of the battery pack is a key process characteristic that needs to be controlled. If the sealing effect between the upper cover and the lower box is poor, water vapor will enter the box, affecting the function of the PACK and even the safety of the battery.
[0003] Currently, a sealant bonding process is used to seal the upper cover and the lower box. If leakage occurs, it is impossible to repair the glue and rework. At the same time, it takes time for the glue to cure, which prolongs the process cycle. Utility Model Content
[0004] The utility model aims to provide a lithium-ion battery plastic laser welding auxiliary device, which realizes uniform welding of the upper cover and the lower box body by pressing down the upper cover according to the shape, and solves the problem of laser welding failure caused by the workpiece itself blocking the laser by means of mirror reflection welding.
[0005] The above technical purpose of the utility model is achieved through the following technical scheme: a lithium-ion battery plastic laser welding auxiliary device, including an upper cover profiling and pressing down module, a mirror base and a laser reflector module arranged on the mirror base, the laser reflector module includes a reflective mirror surface and a mirror angle adjustment device, the reflective mirror surface is arranged on the mirror base, the reflective mirror surfaces are connected end to end to form a welding cavity, the upper cover profiling and pressing down module is located in the welding cavity, and the mirror angle adjustment device adjusts the inclination angle of the reflective mirror surface.
[0006] The utility model is further configured as follows: the upper cover profiling and pressing down module comprises an upper cover profiling structure, a light-shielding structure and a pressing down column, and the light-shielding structure is connected to the upper cover profiling structure via the pressing down column.
[0007] By adopting the above technical solution, the pressure is transmitted to the upper cover profiling structure through the downward pressure of the cylinder to press down the entire surface. The upper cover profiling structure fully contacts the upper surface of the upper cover by avoiding the air vent, increasing the communication port downward pressure block, and improving the consistency of welding penetration at the communication port.
[0008] The utility model is further configured as follows: the mirror angle adjustment device includes a fixed base, a rotating rod, a fixing bolt, and an arc-shaped hole; the fixed base is arranged on the mirror base and is located at both ends of the reflecting mirror; the rotating rod is fixedly arranged at both ends of the reflecting mirror; the rotating rod is rotatably connected to the fixed base; an arc-shaped hole is opened above the fixed base; the fixing bolt passes through the arc-shaped hole and is connected to the reflecting mirror.
[0009] By adopting the above technical solution, the angle of the reflective mirror can be adjusted according to the degree of obstruction of the workpiece, and the angle can be fixed by the mirror base. When changing the model, the entire mirror can be replaced directly without further adjustment.
[0010] The utility model is further configured as follows: an upper cover is connected below the upper cover profiling structure.
[0011] The utility model is further configured as follows: the upper cover is made of light-transmitting material.
[0012] The utility model is further configured as follows: a cooling device is also arranged on the mirror base, comprising a cooling bracket and a cooling port arranged on the cooling bracket.
[0013] By adopting the above technical solution, the laser is irradiated onto the weld of the upper cover through reflection by the reflective mirror. Since the upper cover is made of light-transmitting material and the lower box is made of opaque material, the laser passes through the upper cover and gathers on the welding surface of the lower box for welding. The upper cover contour pressing module continuously presses down the upper cover, thereby realizing the welding of the upper cover and the lower box, until the set melting depth is reached and the welding is completed.
[0014] The beneficial effects of the utility model are as follows: the utility model is mainly used for the plastic laser welding auxiliary device of square lithium-ion battery PACK. The upper cover is positioned and fixed by using an upper cover pressing device, thereby reducing the manual positioning process, avoiding the upper cover from moving up and down during welding, and reducing the situation where the height of the PACK exceeds the standard; by using a mirror reflection module, the number of laser equipment is reduced, the difficulty of sealing is reduced, and the welding efficiency is improved; the upper cover and the lower box body are welded and sealed by laser welding, the melting depth is monitored, the airtightness of the sealing is ensured, and the number of rework is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0016] Figure 1 It is a schematic diagram of the structure of the utility model.
[0017] Figure 2 It is a structural schematic diagram of the upper cover contour pressing module of the utility model.
[0018] Figure 3 It is a partial structural schematic diagram of the utility model.
[0019] Figure 4 It is a schematic diagram of the structure of the laser reflector module of the utility model.
[0020] Figure 5 It is a schematic diagram of the reflective mirror structure of the utility model.
[0021] In the figure, 1. upper cover contoured lower pressure module; 11. upper cover contoured structure; 12. light-shielding structure; 13. lower pressure column; 2. mirror base; 3. laser reflector module; 31. reflective mirror; 32. rotating rod; 33. fixed base; 331. arc hole; 34. fixing bolt; 4. lower box; 5. upper cover; 6. cooling bracket; 7. cooling port. DETAILED DESCRIPTION
[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] Examples, such as Figure 1 , Figure 2 , Figure 3 As shown, a lithium-ion battery plastic laser welding auxiliary device includes an upper cover profiling and pressing module 1, a mirror base 2 and a laser reflector module 3 arranged on the mirror base 2, the laser reflector module 3 includes a reflective mirror surface 31 and a mirror angle adjustment device, the reflective mirror surface 31 is arranged on the mirror base 2, the reflective mirror surface 31 is connected end to end to form a welding cavity, the upper cover profiling and pressing module 1 is located in the welding cavity, and the mirror angle adjustment device adjusts the inclination angle of the reflective mirror surface 31.
[0024] like Figure 2 , Figure 3 As shown, the upper cover profiling and pressing down module 1 comprises an upper cover profiling structure 11 , a light-shielding structure 12 , and a pressing down column 13 . The light-shielding structure 12 is connected to the upper cover profiling structure 11 via the pressing down column 13 .
[0025] The pressure is transmitted to the upper cover profiling structure 11 through the downward pressure of the cylinder to press down the entire surface. The upper cover profiling structure 11 fully contacts the upper surface of the upper cover 5 by avoiding the air vent, adding a communication port downward pressure block, and improving the consistency of welding penetration at the communication port.
[0026] like Figure 3 , Figure 4 , Figure 5 As shown, the mirror angle adjustment device includes the fixed base 33, the rotating rod 32, the fixing bolt 34, and the arc hole 331. The fixed base 33 is arranged on the mirror base 2 and is located at both ends of the reflective mirror 31. The rotating rod 32 is fixedly arranged at both ends of the reflective mirror 31. The rotating rod 32 is rotatably connected to the fixed base 33. An arc hole 331 is opened above the fixed base 33. The fixing bolt 34 passes through the arc hole 331 and is connected to the reflective mirror. The angle of the reflective mirror 31 can be adjusted according to the degree of workpiece occlusion. The angle is fixed by the mirror base 2. When changing the model, it can be directly replaced as a whole without further adjustment.
[0027] like Figure 2 As shown, the upper cover 5 is connected to the lower part of the upper cover profiling structure 11. The upper cover 5 is made of a light-transmitting material. A cooling device is also provided on the mirror base 2, including a cooling bracket 6 and a cooling port 7 provided on the cooling bracket 6. The laser is irradiated onto the weld of the upper cover 5 by the reflection of the reflective mirror 31. Since the upper cover 5 is made of a light-transmitting material and the lower box body 4 is made of an opaque material, the laser passes through the upper cover 5 and gathers on the welding surface of the lower box body 4 for welding. The upper cover profiling pressing module 1 continuously presses down the upper cover 5, thereby realizing the welding of the upper cover 5 and the lower box body 4, until the set melting depth is reached and the welding is completed.
[0028] The utility model is mainly used for a plastic laser welding auxiliary device of a square lithium-ion battery PACK. By using an upper cover profiling pressing module 1 to position and fix the upper cover 5, the manual positioning process is reduced, the upper cover 5 is prevented from moving up and down during welding, and the PACK height dimension exceeding the standard is reduced; by using a mirror reflection module, the number of laser devices is reduced, the difficulty of sealing is reduced, and the welding efficiency is improved; the upper cover 5 and the lower box body 4 are welded and sealed by laser welding, the melting depth is monitored, the air tightness of the sealing is ensured, and the number of rework is reduced.
Claims
1. A lithium-ion battery plastic laser welding auxiliary device, characterized in that: The invention comprises an upper cover profiling pressing module (1), a mirror base (2) and a laser reflector module (3) arranged on the mirror base (2); the laser reflector module (3) comprises a reflector surface (31) and a mirror angle adjustment device; the reflector surface (31) is arranged on the mirror base (2); the reflector surfaces (31) are connected end to end to form a welding cavity; the upper cover profiling pressing module (1) is located in the welding cavity; and the mirror angle adjustment device adjusts the inclination angle of the reflector surface (31).
2. A lithium-ion battery plastic laser welding auxiliary device according to claim 1, characterized in that: The upper cover profiling and pressing down module (1) comprises an upper cover profiling structure (11), a light-shielding structure (12), and a pressing down column (13); the light-shielding structure (12) and the upper cover profiling structure (11) are connected via the pressing down column (13).
3. A lithium-ion battery plastic laser welding auxiliary device according to claim 1, characterized in that: The mirror angle adjustment device comprises a fixed base (33), a rotating rod (32), a fixing bolt (34), and an arc-shaped hole (331); the fixed base (33) is arranged on the mirror base (2) and is located at two ends of the reflecting mirror surface (31); the rotating rod (32) is fixedly arranged at two ends of the reflecting mirror surface (31); the rotating rod (32) is rotatably connected to the fixed base (33); an arc-shaped hole (331) is provided above the fixed base (33); and the fixing bolt (34) passes through the arc-shaped hole (331) and is connected to the reflecting mirror surface (31).
4. A lithium-ion battery plastic laser welding auxiliary device according to claim 2, characterized in that: The upper cover (5) is connected below the upper cover contour structure (11).
5. A lithium-ion battery plastic laser welding auxiliary device according to claim 4, characterized in that: The upper cover (5) is made of light-transmitting material.
6. The lithium-ion battery plastic laser welding auxiliary device according to claim 1, characterized in that: The mirror base (2) is also provided with a cooling device, comprising a cooling bracket (6) and a cooling port (7) provided on the cooling bracket (6).