Lithium ion battery soft package module laser welding auxiliary crimping tool

Abstract

The utility model relates to the technical field of lithium ion battery module devices, and discloses a lithium ion battery soft package module laser welding auxiliary crimping tool which comprises a welding pressure head, a supporting plate, a dust hood and an air inlet pipe, the welding pressure head is fixed to the side face of one end of the supporting plate, and the dust hood is fixed to the other opposite side face of the supporting plate. The welding pressing head is hollow and communicates with the dust suction hood, and an air inlet communicating with an air inlet pipe is formed in the side face, forming a right angle with the supporting plate, of the welding pressing head. The device has the following advantages and effects that the whole device can reduce the conditions of welding seam oxidation and welding slag accumulation caused by the fact that the distance between the shielding gas outlet hole and the welding track is remote and the distance between the gas suction hole and the welding track is remote, and the welding quality of the lithium ion battery module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium-ion battery module manufacturing, and particularly relates to a laser welding auxiliary crimping tooling for a lithium-ion battery soft package module. Background Art

[0002] With the support and promotion of the country for the development of environmental protection new energy, 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.

[0003] In the production process of lithium-ion battery modules, the welding effect is the key point. Among them, for the welding of lithium-ion battery modules, ensuring the welding quality is an important link to ensure battery safety, stable performance and improve production efficiency. In the production process, it is necessary to strictly control the welding process to ensure that the welding quality meets the standard requirements, so as to guarantee the quality and performance of battery products.

[0004] At present, when welding a lithium-ion battery module, after using a downward pressing tooling to fix the module tab, the laser emits light for welding. During the welding process, the air outlet hole of the protective gas is far from the welding track, making it difficult to prevent the weld from oxidizing. The suction hole is far from the welding track, and the problem of weld slag spatter is difficult to solve, resulting in a large deviation in the welding quality of the module. Content of the Utility Model

[0005] The purpose of the utility model is to provide a laser welding auxiliary crimping tooling for a lithium-ion battery soft package module, which has the effect of reducing the occurrence of weld oxidation and weld slag accumulation and improving the welding quality of the lithium-ion battery module.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: it includes a welding press head, a support plate, a dust suction cover and an air inlet pipe. The welding press head is fixed to one side surface of the end of the support plate, and a dust suction cover is fixed to the opposite side surface. The welding press head is hollow and communicated with the dust suction cover. An air inlet communicated with the air inlet pipe is arranged on the side surface of the welding press head perpendicular to the support plate.

[0007] The further setting of the utility model is: two parallel fixing plates are detachably connected inside one side of the welding press head opposite to the support plate, and inserts for fixing the fixing plates are arranged on the side surface of the welding press head.

[0008] The further setting of the utility model is: a first exhaust hole is arranged on the end surface of the welding press head close to the support plate, and parallel second exhaust holes and third exhaust holes facing the fixing plates are also arranged inside the welding press head. The first exhaust hole, the second exhaust hole and the third exhaust hole are all communicated with the air inlet through a blowing pipeline.

[0009] A further setting of the present utility model is as follows: The dust suction hood includes a cover plate with openings at both ends and a dust suction pipe. The cover plate is in a cuboid shape. One end of the dust suction pipe is communicated with the side surface of the cover plate, and the other end can be connected to a dust extraction fan.

[0010] A further setting of the present utility model is as follows: Connecting holes I are provided around the side surface where the welding press head is connected to the support plate, and connecting holes II are provided around the side surface where the dust suction hood is connected to the support plate.

[0011] A further setting of the present utility model is as follows: A notch is provided on the support plate between the dust suction hood and the welding press head.

[0012] A further setting of the present utility model is as follows: The insert is preferably a bolt.

[0013] A further setting of the present utility model is as follows: The fixing plate is preferably a ceramic sheet.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. When welding operations are carried out, first place the welding material between the two fixing plates for fixation to ensure the welding materials are in contact. Connect the dust extraction fan to the dust suction pipe, start the dust extraction fan, press the end of the fixing plate against the module tab. In addition, connect the intake pipe to the protective gas tank. Subsequently, the laser beam passes through the cover plate of the dust suction hood and the welding press head in sequence and is concentrated on the surface of the module tab to form a welding molten pool. Since protective gas is blown into the welding press head during welding, it effectively prevents the welding molten pool from contacting and oxidizing with the air. At the same time, due to the setting of the dust suction hood, the spatter generated during the welding process can be sucked and collected to prevent it from spreading around.

[0016] 2. The entire device can reduce the oxidation of the weld seam and the accumulation of welding slag caused by the remote distance between the protective gas outlet holes and the welding track and the remote distance between the suction holes and the welding track, and improve the welding quality of the lithium-ion battery module.

[0017] 3. By setting multiple outlet holes, it ensures the full dispersion of the protective gas in the welding press head, effectively utilizes the protective gas while ensuring the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a structural schematic diagram of the present utility model.

[0020] Figure 2 Yes Figure 1 Another schematic view of the side structure.

[0021] Figure 3 It is a schematic cross-sectional structure view of the welding pressure head in the present utility model.

[0022] In the figure, 1 is the welding pressure head; 2 is the support plate; 3 is the dust suction hood; 31 is the cover plate; 32 is the dust suction pipe; 4 is the air inlet pipe; 5 is the fixing plate; 6 is the insert; 7 is the first exhaust hole; 8 is the second exhaust hole; 9 is the third exhaust hole; 10 is the blowing pipeline; 11 is the notch. Specific implementation mode

[0023] The technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment, a laser welding assisted crimping tooling for a lithium-ion battery soft-pack module, as Figures 1-3 shown, including a welding pressure head 1, a support plate 2, a dust suction hood 3 and an air inlet pipe 4. The welding pressure head 1 is fixed to one end side of the support plate 2, and a dust suction hood 3 is fixed to the opposite side. A notch 11 is provided on the support plate 2 between the dust suction hood 3 and the welding pressure head 1. The dust suction hood 3 includes a cover plate 31 with openings at both ends and a dust suction pipe 32. The cover plate 31 is in a cuboid shape. One end of the dust suction pipe 32 is communicated with the side of the cover plate 31, and the other end can be connected to a dust extraction fan. The welding pressure head 1 is hollow and communicated with the dust suction hood 3. An air inlet communicated with the air inlet pipe 4 is provided on the side of the welding pressure head 1 perpendicular to the support plate 2. When welding operations are carried out, first place the welding material between two fixing plates 5 for fixation to ensure the fit between the welding materials. Connect the dust extraction fan to the dust suction pipe 32, start the dust extraction fan, and the end of the fixing plate 5 contacts and presses the module tab. In addition, connect the air inlet pipe 4 to a protective gas tank. Subsequently, the laser beam passes through the cover plate 31 of the dust suction hood 3 and the welding pressure head 1 in sequence and is concentrated on the surface of the module tab to form a welding molten pool. Since protective gas is blown into the welding pressure head 1 during welding, it effectively avoids the oxidation of the welding molten pool in contact with air. At the same time, due to the setting of the dust suction hood 3, the spatter generated during the welding process can be sucked and collected to prevent it from spreading around.

[0025] Furthermore, two parallel fixing plates 5 are detachably connected to the inside of one side of the welding pressure head 1 relative to the support plate 2. The fixing plates 5 are preferably ceramic sheets for contacting the tabs. An insert 6 for fixing the fixing plates 5 is provided on the side of the welding pressure head 1. The insert 6 is preferably a bolt.

[0026] Further, a first exhaust hole 7 is provided on the end face of the welding tip 1 close to the support plate 2. The welding tip 1 is also provided with parallel second exhaust holes 8 and third exhaust holes 9 facing the fixing plate 5. The first exhaust hole 7, the second exhaust hole 8 and the third exhaust hole 9 are all communicated with the air inlet through a blowing pipeline 10. By providing multiple air outlet holes, it is ensured that the shielding gas is fully dispersed in the welding tip 1, and while efficiently utilizing the shielding gas, the welding effect is ensured.

[0027] Further, connection holes I are provided around the side surfaces where the welding tip 1 is connected to the support plate 2, and connection holes II are provided around the side surfaces where the dust suction hood 3 is connected to the support plate 2, improving the connection stability.

[0028] Working principle of a laser welding auxiliary crimping tooling for a lithium-ion battery soft-pack module:

[0029] When welding operations are carried out, first place the welding material between the two fixing plates 5 for fixation to ensure that the welding materials are in contact with each other. Connect the dust extraction fan to the dust suction pipe 32, start the dust extraction fan, and the end of the fixing plate 5 is in contact with and presses the module tab. In addition, connect the air inlet pipe 4 to the shielding gas tank, and then the laser beam passes through the cover plate 31 of the dust suction hood 3 and the welding tip 1 in sequence and is concentrated on the surface of the module tab to form a welding molten pool. Since shielding gas is blown into the welding tip 1 during welding, it effectively prevents the welding molten pool from contacting and oxidizing with the air. At the same time, due to the setting of the dust suction hood 3, the spatter generated during the welding process can be sucked and collected to prevent it from spreading around.

Claims

1. A laser welding assisted crimping tooling for a lithium-ion battery soft-pack module, characterized in that: It includes a welding head (1), a support plate (2), a dust suction hood (3) and an air inlet pipe (4). The welding head (1) is fixed to the side of one end of the support plate (2), and the dust suction hood (3) is fixed to the opposite side. The welding head (1) is hollow and communicates with the dust suction hood (3). An air inlet communicating with the air inlet pipe (4) is provided on the side of the welding head (1) that is at a right angle to the support plate (2).

2. The laser welding assisted crimping tooling for a lithium-ion battery soft pack module according to claim 1, wherein: Two parallel fixing plates (5) are detachably connected to the inside of one side of the welding head (1) relative to the support plate (2). An insert (6) for fixing the fixing plate (5) is provided on the side of the welding head (1).

3. A laser welding assisted crimping tooling for a lithium-ion battery soft-pack module according to claim 2, characterized in that: A first exhaust hole (7) is provided on the end face of the welding head (1) close to the support plate (2). Second exhaust holes (8) and third exhaust holes (9) parallel to each other and facing the fixing plate (5) are also provided inside the welding head (1). The first exhaust hole (7), the second exhaust hole (8) and the third exhaust hole (9) are all connected to the air inlet through a blowing pipeline (10).

4. A laser welding assisted crimping tooling for a lithium-ion battery soft-pack module according to claim 3, characterized in that: The dust suction hood (3) includes a cover plate (31) with openings at both ends and a dust suction pipe (32). The cover plate (31) is rectangular parallelepiped-shaped. One end of the dust suction pipe (32) communicates with the side of the cover plate (31), and the other end can be connected to a dust extraction fan.

5. The laser welding assisted crimping tooling for a lithium-ion battery soft-pack module according to claim 4, wherein: Connection holes one are provided around the side of the welding head (1) connected to the support plate (2). Connection holes two are provided around the side of the dust suction hood (3) connected to the support plate (2).

6. The laser welding assisted crimping tooling for a lithium-ion battery soft-pack module according to claim 5, wherein: A notch (11) is provided on the support plate (2) between the dust suction hood (3) and the welding head (1).

7. A laser welding assisted crimping tooling for a lithium-ion battery soft-pack module according to claim 2, characterized in that: The insert (6) is preferably a bolt.

8. The laser welding assisted crimping tooling for a lithium-ion battery soft pack module according to claim 2, wherein: The fixing plate (5) is preferably a ceramic sheet.

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