Connecting piece preheating mechanism

Abstract

The utility model relates to the technical field of battery ultrasonic welding, in particular to a connecting piece preheating mechanism which comprises two fixing support assemblies which are symmetrically arranged, first air cylinders which are correspondingly arranged are installed on the two fixing support assemblies respectively, and the output ends of the two first air cylinders are simultaneously connected with an installation plate. And a press-fitting positioning plate is detachably mounted at the bottom of the mounting plate. According to the utility model, when the press-fitting positioning plate descends, the press-fitting boss is favorable for shaping the tab, the risk that the tab is torn in the ultrasonic welding process is effectively reduced, and meanwhile, the U-shaped part can preheat the connecting piece after realizing the heating effect under the action of the electromagnetic heating ring, so that the temperature of the connecting piece is favorably increased, and the welding quality is improved. And the movement rate of metal atoms is increased, mutual diffusion of atoms between welding foils is accelerated in the welding process, atom bonding is formed, the effect of improving the ultrasonic welding strength is achieved, and the stable performance of the battery is effectively improved through the final welding effect.

Description

Technical Field

[0001] The utility model relates to the technical field of battery ultrasonic welding, in particular to a connecting piece preheating mechanism. Background Art

[0002] Ultrasonic welding is increasingly being used in the lithium-ion battery industry due to its excellent properties, including high weld strength, low resistivity, high efficiency, and low energy consumption. Ultrasonic welding utilizes the high-frequency vibrations of ultrasound to generate frictional heat, achieving localized heating and plastic deformation of the material, ultimately joining the two materials.

[0003] Currently, ultrasonic welding of battery tabs involves ultrasonically welding the positive or negative tabs of two batteries together using tabs made of the same material to securely connect the two batteries. The welding quality has a significant impact on battery yield and performance. However, current ultrasonic welding of battery tabs presents challenges such as insufficient residual area after welding and tab tearing, which can increase the battery's internal resistance and affect performance. Utility Model Content

[0004] The utility model provides a connecting piece preheating mechanism to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The top of the pressing plate is provided with two symmetrical pressing bosses, and the inner bottom walls of the two grooves are respectively provided with two first through-holes, and the inner bottom walls of the two grooves are respectively provided with two U-shaped parts, and the bottoms of the two groups of U-shaped parts are respectively connected to the output ends of the second cylinders, and the two second cylinders are correspondingly mounted on the fixed bracket assembly, and four electromagnetic heating rings for heating the U-shaped parts are installed on the fixed bracket assembly, and the four electromagnetic heating rings are all arranged at the bottom of the pressing positioning plate.

[0007] The combination of press-fit bosses and grooves can reshape the tabs, reducing the risk of tab tearing during ultrasonic welding; and the combination of U-shaped components and electromagnetic heating rings can preheat the connecting pieces, improving the ultrasonic welding strength and battery stability.

[0008] Preferably, the fixed bracket assembly includes two symmetrically arranged fixed plate frames, base plates respectively connected to the two fixed plate frames, first limiting column groups respectively connected to the two base plates, and top plates respectively connected to the top ends of the two first limiting column groups, and the two first cylinders are respectively installed at the bottom ends of the two top plates, and the two second cylinders are respectively installed on the inner sides of the two fixed plate frames.

[0009] Preferably, two second openings are respectively formed on the tops of the two fixed plate frames, and the four second openings correspond one-to-one to the four first openings.

[0010] Preferably, the fixed bracket assembly also includes a second limiting column group connected to the top of the base plate and the bottom of the top plate, and a linear bearing is fixedly installed on the second limiting column group. One end of the mounting plate is slidably connected to the second limiting column group through a linear bearing.

[0011] Preferably, every two electromagnetic heating rings among the four electromagnetic heating rings form a group, and each group of electromagnetic heating rings is respectively connected to two fixed plate frames, and the electromagnetic heating rings are arranged on the outside of the second opening.

[0012] Preferably, the press-fitting boss and the groove are both U-shaped, and the two first openings in the groove are respectively arranged in two longitudinal sections of the U-shaped groove.

[0013] Preferably, the bottom of each group of U-shaped components is connected to a lifting plate, and the bottom of the lifting plate is fixedly connected to the output end of the second cylinder.

[0014] Preferably, arc-shaped chamfers are provided along the edges of the bottoms of the two press-fitting bosses.

[0015] Preferably, a plurality of positioning holes are formed through the mounting plate, a plurality of threaded holes are formed through the press-fit positioning plate, and the mounting plate and the press-fit positioning plate are fixedly connected by screws.

[0016] Preferably, through holes are respectively formed at both ends of the mounting plate, and the bearing sleeve section of the linear bearing is arranged in the through holes.

[0017] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0018] In the present invention, through the design of the press-fitting boss and the arc-shaped chamfer of the bottom edge of the press-fitting boss, when the first cylinder pushes the mounting plate and the press-fitting positioning plate to descend, the press-fitting boss can shape the pole ear in the groove during the pressing process, effectively reducing the risk of the pole ear tearing during the ultrasonic welding process. At the same time, after the U-shaped component achieves the heating effect under the action of the electromagnetic heating ring, it can preheat the connecting piece, which is beneficial to increase the temperature of the connecting piece, accelerate the movement rate of metal atoms, and promote the mutual diffusion of atoms between the welding foils during the welding process to form atomic bonds, thereby achieving the effect of improving the ultrasonic welding strength. Ultimately, the welding effect effectively improves the stability of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the press-fit boss structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the first port structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the second port structure of the present utility model.

[0023] In the figure: 100, fixed bracket assembly; 101, fixed plate frame; 102, bottom plate; 103, first limiting column group; 104, top plate; 105, second limiting column group; 106, linear bearing;

[0024] 2. First cylinder; 3. Second cylinder; 4. Mounting plate; 5. Press-fit positioning plate; 6. Press-fit boss; 7. Connecting piece placement plate; 8. Groove; 9. First opening; 10. U-shaped component; 11. Electromagnetic heating ring; 12. Second opening; 13. Lifting plate. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification. Example

[0027] like Figure 1-4As shown, the utility model provides a connecting piece preheating mechanism, including two symmetrically arranged fixed bracket assemblies 100, on which the first cylinders 2 corresponding to each other are respectively installed, and the output ends of the two first cylinders 2 are simultaneously connected to a mounting plate 4, and the bottom of the mounting plate 4 is detachably mounted with a press-fitting positioning plate 5, the bottom of the press-fitting positioning plate 5 is provided with two symmetrically arranged press-fitting bosses 6, and the bottom of the press-fitting positioning plate 5 is provided with a connecting piece placement plate 7, and the top of the connecting piece placement plate 7 is provided with a plate adapted to fit the two press-fitting bosses 6. The boss 6 has a groove 8, and the inner bottom walls of the two grooves 8 respectively open two first openings 9, and the insides of the four first openings 9 are respectively movably inserted with U-shaped parts 10, and each two U-shaped parts 10 form a group, and the bottoms of the two groups of U-shaped parts 10 are respectively connected to the output ends of the second cylinders 3, and the two second cylinders 3 are installed on the fixed bracket assembly 100 corresponding to each other. Four electromagnetic heating rings 11 for heating the U-shaped parts 10 are installed on the fixed bracket assembly 100, and the four electromagnetic heating rings 11 are all arranged at the bottom of the press-fit positioning plate 5.

[0028] Specifically, the bottom of each group of U-shaped components 10 is connected to a lifting plate 13, and the bottom of the lifting plate 13 is fixedly connected to the output end of the second cylinder 3, which is used to ensure that the second cylinder 3 drives the two U-shaped components 10 to rise and fall synchronously, so that the four U-shaped components 10 can heat the connecting piece at the same time. After the connecting piece is heated, the high temperature is conducive to accelerating the movement rate of metal atoms, promoting the mutual diffusion of atoms between the welding foils during the welding process, forming atomic bonding, and achieving the effect of improving the ultrasonic welding strength.

[0029] In this embodiment, the fixed bracket assembly 100 includes two symmetrically arranged fixed plate frames 101, base plates 102 respectively connected to the two fixed plate frames 101, first limiting column groups 103 respectively connected to the two base plates 102, and top plates 104 respectively connected to the top ends of the two first limiting column groups 103, and the two first cylinders 2 are respectively installed at the bottoms of the two top plates 104, and the two second cylinders 3 are respectively installed on the inner sides of the two fixed plate frames 101.

[0030] Furthermore, two second openings 12 are respectively opened on the top of the two fixed plate frames 101, and the four second openings 12 correspond to the four first openings 9 respectively, which is conducive to the lifting and lowering of the U-shaped component 10, and enables multiple U-shaped components 10 to heat the connecting piece synchronously, thereby achieving the effect of preheating the connecting piece.

[0031] Furthermore, every two electromagnetic heating rings 11 in the four electromagnetic heating rings 11 form a group, and each group of electromagnetic heating rings 11 is respectively connected to two fixed plate frames 101, and the electromagnetic heating rings 11 are arranged on the outside of the second opening 12, and magnetic induction heating is used to enable the U-shaped component 10 to absorb a certain amount of heat, which is beneficial for the U-shaped component 10 to preheat the connecting piece.

[0032] In this embodiment, the fixed bracket assembly 100 also includes a second limiting column group 105 connected to the top of the base plate 102 and the bottom of the top plate 104. A linear bearing 106 is fixedly installed on the second limiting column group 105. One end of the mounting plate 4 is slidingly connected to the second limiting column group 105 through the linear bearing 106. Through holes are respectively provided at both ends of the mounting plate 4. The bearing sleeve section of the linear bearing 106 is arranged in the through hole for adapting to the installation of the linear bearing 106, thereby ensuring that the linear bearing 106 drives the mounting plate 4 to slide stably on the second limiting column group 105.

[0033] In this embodiment, the press-fitting boss 6 and the groove 8 are both U-shaped, and the two first openings 9 in the groove 8 are respectively provided in the two longitudinal sections of the U-shaped groove 8 . The bottom edges of the two press-fitting bosses 6 are provided with arc chamfers.

[0034] Specifically, the size of the press-fitting boss 6 is adapted to the size of the groove 8, and after the mounting plate 4 is fitted with the connecting plate placement plate 7, the outside of the press-fitting boss 6 is tightly fitted with the inside of the groove 8, and the design of the arc-shaped chamfer on the bottom edge of the press-fitting boss 6 also has a shaping effect on the tab, thereby avoiding the problem of tensile stress at the root of the tab causing the tab to tear during welding.

[0035] In this embodiment, a plurality of positioning holes are opened through the mounting plate 4, a plurality of threaded holes are opened through the press-fit positioning plate 5, and the mounting plate 4 and the press-fit positioning plate 5 are fixedly connected by screws, and the inner diameter of the positioning holes is the same as that of the threaded holes. The cooperation between the two can realize the installation of the press-fit positioning plate 5 in various positions, thereby achieving compatibility with press-fit positioning plates 5 of different sizes.

[0036] The working principle and use process of the present invention are as follows: when in use, the connecting piece placement plate 7 is set on the mechanical arm of the external equipment to ensure that the connecting piece placement plate 7 can be placed at the bottom of the press-fitting positioning plate 5 or pulled out from the bottom of the press-fitting positioning plate 5, and then the battery tabs can be placed in the corresponding grooves 8 before the connecting piece placement plate 7 is placed at the bottom of the press-fitting positioning plate 5. In this way, when the second cylinder 3 pushes the lifting plate 13 to drive the U-shaped component 10 to rise, under the action of the electromagnetic heating ring 11, the U-shaped component 10 can achieve a heating effect on the inner ring side of the electromagnetic heating ring 11, and then the heated U-shaped component 10 When continuing to rise, the first cylinder 2 can push the mounting plate 4 and the press-fitting positioning plate 5 down, prompting the press-fitting boss 6 to descend and shape the pole ear in the groove 8 during the press-fitting process, effectively reducing the risk of the pole ear tearing during ultrasonic welding. At the same time, the U-shaped component 10 is fitted on the bottom of the connecting piece, so that the connecting piece can be preheated, which is beneficial to increase the temperature of the connecting piece, accelerate the movement rate of metal atoms, and promote the mutual diffusion of atoms between the welding foils during the welding process to form atomic bonds, thereby achieving the effect of improving the ultrasonic welding strength. Ultimately, the welding effect effectively improves the stability of the battery.

[0037] In the present invention, the term "plurality" refers to two or more than two, unless otherwise expressly defined. The term "and / or" used herein includes any and all combinations of one or more of the relevant listed items. Terms such as "installation", "connection", "connection", and "fixed" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0038] It should be noted that when an element is referred to as being "assembled to," "mounted to," "fixed to," or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0039] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0040] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A connecting piece preheating mechanism, characterized in that: The invention comprises two symmetrically arranged fixing bracket assemblies (100), wherein first cylinders (2) corresponding to each other are respectively installed on the two fixing bracket assemblies (100), and the output ends of the two first cylinders (2) are simultaneously connected to a mounting plate (4), and a press-fitting positioning plate (5) is detachably mounted on the bottom of the mounting plate (4), and two symmetrically arranged press-fitting bosses (6) are provided on the bottom of the press-fitting positioning plate (5), and a connecting piece placement plate (7) is provided on the bottom of the press-fitting positioning plate (5), and a groove (8) adapted to the two press-fitting bosses (6) is provided on the top of the connecting piece placement plate (7), and the two Two first openings (9) are respectively provided on the inner bottom wall of the groove (8), and a U-shaped component (10) is movably inserted into the interior of each of the four first openings (9), and each two of the U-shaped components (10) form a group, and the bottoms of the two groups of the U-shaped components (10) are respectively connected to the output ends of the second cylinder (3), and the two second cylinders (3) are mounted on the fixed bracket assembly (100) in correspondence with each other, and the fixed bracket assembly (100) is mounted with four electromagnetic heating rings (11) for heating the U-shaped component (10), and the four electromagnetic heating rings (11) are all arranged at the bottom of the press-fit positioning plate (5).

2. A connecting piece preheating mechanism according to claim 1, characterized in that: The fixed bracket assembly (100) comprises two symmetrically arranged fixed plate frames (101), base plates (102) respectively connected to the two fixed plate frames (101), first limiting column groups (103) respectively connected to the two base plates (102), and top plates (104) respectively connected to the top ends of the two first limiting column groups (103), and the two first cylinders (2) are respectively mounted on the bottom ends of the two top plates (104), and the two second cylinders (3) are respectively mounted on the inner sides of the two fixed plate frames (101).

3. A connecting piece preheating mechanism according to claim 2, characterized in that: The fixed bracket assembly (100) further comprises a second limiting column group (105) connected to the top of the base plate (102) and the bottom of the top plate (104); a linear bearing (106) is fixedly mounted on the second limiting column group (105); and one end of the mounting plate (4) is slidably connected to the second limiting column group (105) via the linear bearing (106).

4. A connecting piece preheating mechanism according to claim 3, characterized in that: Through holes are respectively provided at both ends of the mounting plate (4), and the bearing sleeve section of the linear bearing (106) is arranged in the through holes.

5. The connecting piece preheating mechanism according to claim 2, characterized in that: Two second openings (12) are respectively provided on the tops of the two fixed plate frames (101), and the four second openings (12) correspond one-to-one to the four first openings (9).

6. A connecting piece preheating mechanism according to claim 5, characterized in that: Every two electromagnetic heating rings (11) in the four electromagnetic heating rings (11) form a group, and each group of electromagnetic heating rings (11) is respectively connected to two fixed plate frames (101), and the electromagnetic heating rings (11) are arranged on the outside of the second opening (12).

7. The connecting piece preheating mechanism according to claim 1, characterized in that: The press-fitting boss (6) and the groove (8) are both U-shaped, and the two first openings (9) in the groove (8) are respectively arranged in two longitudinal sections of the U-shaped groove (8).

8. The connecting piece preheating mechanism according to claim 1, characterized in that: The bottom of each group of U-shaped components (10) is respectively connected to a lifting plate (13), and the bottom of the lifting plate (13) is fixedly connected to the output end of the second cylinder (3).

9. The connecting piece preheating mechanism according to claim 1, characterized in that: The bottom edges of the two press-fitting bosses (6) are provided with arc-shaped chamfers.

10. The connecting piece preheating mechanism according to claim 1, characterized in that: The mounting plate (4) is provided with a plurality of positioning holes, the press-fit positioning plate (5) is provided with a plurality of threaded holes, and the mounting plate (4) and the press-fit positioning plate (5) are fixedly connected by screws.

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