Vertical laser welding dust removal device for cylindrical lithium battery

Abstract

The utility model discloses a cylindrical lithium cell vertical laser welding dust collector, include: dust removal mechanism body, dust removal mechanism body is sleeve -like structure, including sleeve wall, be provided with first cavity in sleeve wall, be used for forming dust removal air duct, and the sleeve wall surrounds and sets out a center passage, and the center passage penetrates the upper and lower two end surfaces of dust removal mechanism body, dust removal pipeline, dust removal pipeline and dust removal mechanism body are connected, and dust removal pipeline is sleeve -like structure, including the flow channel for the fluid through of middle, and the flow channel one end is linked with first cavity, and the other end and external dust removal equipment intercommunication, fixed base, and with dust removal mechanism body lower end connection, and fixed base is provided with second cavity in the communication with first cavity, and the laser channel is communicated to have in second cavity upper side, and the dust removal mouth is communicated to have in second cavity lower side corresponding laser channel place, is used for the welding slag of welding mark area and is inhaled and is introduced into second cavity. Dust removal air duct reduces in the utility model, improves the utilization rate of negative pressure.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a vertical laser welding dust removal device for cylindrical lithium batteries. Background Technology

[0002] In the manufacturing process of cylindrical lithium batteries, vertical laser welding is a key process used to connect the bottom of the battery casing to the end face of the bare cell. During this process, the laser melts the metal instantly, generating a large number of fine welding slag particles. If these welding slag particles are not removed in time and effectively, they will fall back into the unsolidified weld pool area, causing serious quality defects such as weld blasting and bottom penetration, which directly affect the safety and yield of the battery.

[0003] Currently, the most commonly used dust removal solution in the industry is the annular dust removal structure. This structure has annular dust removal ports around the bottom of the battery casing. However, this structure has obvious drawbacks: the annular dust removal ports not only cover the welding area that needs dust removal, but also a large number of non-welding areas. This large-area coverage design results in an excessively large dust removal area, which causes the negative pressure that should be concentrated in the welding area to be greatly dispersed, resulting in low negative pressure utilization. As a result, the welding slag actually generated in the welding area cannot be efficiently adsorbed and collected, the dust removal effect is not ideal, and the proportion of defects such as bottom weld rupture is relatively high. Utility Model Content

[0004] The purpose of this utility model is to provide a vertical laser welding dust removal device for cylindrical lithium batteries, aiming to solve at least one of the technical problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A vertical laser welding dust removal device for cylindrical lithium batteries, characterized in that it comprises: The dust removal mechanism body is a sleeve-shaped structure, including a sleeve wall, a first cavity is provided in the sleeve wall to form a dust removal air duct, and a central channel is formed by the sleeve wall, which runs through the upper and lower end faces of the dust removal mechanism body. The dust removal pipe is connected to the dust removal mechanism body. The dust removal pipe includes a flow channel in the middle for fluid to pass through. One end of the flow channel is connected to the first cavity, and the other end is connected to the external dust removal equipment. A fixed base is connected to the lower end of the dust removal mechanism body. A second cavity communicating with the first cavity is provided in the fixed base. A laser channel is connected to the upper side of the second cavity, and a dust removal port is connected to the lower side of the second cavity corresponding to the laser channel, which is used to suck in the welding slag generated in the welding area and introduce it into the second cavity.

[0006] Preferably, the sleeve wall includes an outer wall and an inner wall, and the first interlayer cavity formed between the outer wall and the inner wall constitutes the first cavity.

[0007] Preferably, both the outer and inner walls have circular cross-sections and are coaxially arranged.

[0008] Preferably, the dust removal mechanism body is frustum-shaped, with the smaller diameter end of the dust removal mechanism body facing downwards.

[0009] Preferably, there are two dust removal pipes, which are symmetrically arranged on the left and right sides of the dust removal mechanism body.

[0010] Preferably, the fixed base includes a horizontally arranged first fixed plate, which is adapted to the bottom of the inner wall in shape and size, and is fixed to the bottom surface of the inner wall in close contact; a second fixed plate is arranged parallel to the lower side of the first fixed plate, and the outer wall extends downward to the upper surface of the second fixed plate, and the bottom surface of the outer wall and the upper surface of the second fixed plate are connected.

[0011] Preferably, the second interlayer cavity formed between the first fixing plate and the second fixing plate constitutes the second cavity.

[0012] Preferably, the downward-facing projection surface of the dust removal port completely covers the downward-facing projection surface of the laser channel.

[0013] Preferably, the dust removal port is cross-shaped.

[0014] The beneficial effects of this utility model are: 1. This utility model sets a cross-shaped dust removal port on the fixed base, so that the dust removal area can accurately cover the welding area at the bottom of the cylindrical lithium battery, and physically isolate it from the surrounding non-welding area. This concentrates the limited negative pressure suction on the source of welding slag, thereby improving the utilization rate of negative pressure.

[0015] 2. Due to the significantly reduced width of the cross-shaped dust removal port, the air velocity flowing through the duct will increase dramatically under the same negative pressure air volume. The higher air velocity has a stronger adsorption and carrying capacity for welding slag particles, which can be quickly drawn away the welding slag the moment it is generated, effectively preventing it from falling onto the welding surface, thereby significantly reducing the proportion of welding defects such as pores and bottom penetration.

[0016] 3. The dust removal mechanism is designed in the shape of a frustum with the smaller diameter end facing downwards. This conical structure helps to converge and accelerate the airflow at the bottom, further optimizing the flow field and improving the dust removal efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the front view of this utility model; Figure 2This is a front view schematic diagram of the present invention; Figure 3 yes Figure 2 Axonometric sectional view along the AA direction; Figure 4 This is a top view schematic diagram of this utility model; Figure 5 yes Figure 4 Axonometric sectional view along the CC direction; Figure 6 This is a bottom view schematic diagram of this utility model.

[0018] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] like Figures 1-6 As shown, a vertical laser welding dust removal device for cylindrical lithium batteries includes a dust removal mechanism body 1, a fixed base 3, and a dust removal pipe 2.

[0021] The dust removal mechanism body 1 is a sleeve-shaped structure, including a sleeve wall. A first cavity is provided in the sleeve wall to form a dust removal air duct. In this embodiment, the sleeve wall includes an outer wall 12 and an inner wall 14. A first interlayer cavity 13 formed between the outer wall 12 and the inner wall 14 constitutes the first cavity. The inner wall 14 surrounds a central channel 11, which penetrates the upper and lower end faces of the dust removal mechanism body 1.

[0022] In this embodiment, the dust removal mechanism body 1 is frustum-shaped, with the small diameter end of the dust removal mechanism body 1 facing downwards. The outer wall 12 and the inner wall 14 are both circular in cross-section, and the outer wall 12 and the inner wall 14 are coaxially arranged.

[0023] The dust removal pipe 2 is connected to the dust removal mechanism body 1. The dust removal pipe 2 includes a flow channel 21 in the middle for fluid to pass through. One end of the flow channel 21 is connected to the first interlayer cavity 13, and the other end is connected to the external dust removal equipment (not shown in the figure).

[0024] In this embodiment, the dust removal pipe 2 is preferably a circular pipe structure.

[0025] In order to improve dust removal efficiency and reduce gas flow deviation, in this embodiment, the number of dust removal pipes 2 is preferably two. The two dust removal pipes 2 are symmetrically arranged on the left and right sides of the dust removal mechanism body 1. The dust removal pipe 2 on the left side extends inclined to the upper left, and the dust removal pipe 2 on the right side extends inclined to the upper right.

[0026] The fixed base 3 is connected to the lower end of the dust removal mechanism body 1. The fixed base 3 is provided with a second cavity that communicates with the first cavity. The upper side of the second cavity is connected to a laser channel 33, and the lower side of the second cavity is connected to a dust removal port 34 corresponding to the laser channel 33, which is used to suck in the welding slag generated in the welding area and introduce it into the second cavity.

[0027] In this embodiment, the fixed base 3 includes a horizontally arranged first fixed plate 31, which is adapted to the bottom of the inner wall 14 in shape and size, and is fixed to the bottom surface of the inner wall 14 in close contact; a second fixed plate 32 is arranged parallel to the lower side of the first fixed plate 31, and the outer wall 12 extends downward to the upper surface of the second fixed plate 32, and the bottom surface of the outer wall 12 is connected to the upper surface of the second fixed plate 32.

[0028] In this embodiment, the second interlayer cavity 35 formed between the first fixing plate 31 and the second fixing plate 32 constitutes the second cavity.

[0029] In this embodiment, the downward projection surface of the dust removal port 34 completely covers the downward projection surface of the laser channel 33.

[0030] In order to improve the utilization rate of negative pressure and the dust removal effect, in this embodiment, both the laser channel 33 and the dust removal port 34 are cross-shaped. The cross-shaped dust removal port 34 can completely cover the soldering area. The cross-shaped dust removal port 34 has a small coverage area, which improves the utilization rate of negative pressure. At the same time, since the air outlet width of the cross-shaped dust removal port 34 is smaller, it can more effectively increase the dust removal wind speed and improve the dust removal effect.

[0031] In order to connect with the welding head, in this embodiment, the second fixing plate 32 protrudes outward from the bottom surface of the outer wall 12 in the horizontal direction, and the part of the second fixing plate 32 protruding from the bottom surface of the outer wall 12 is provided with bolt holes for fixing the external welding head.

[0032] The working principle of this utility model is as follows: When the external dust removal equipment is activated, the laser welding head of the vertical laser welding dust removal equipment is located in the central channel 11. The emitted laser beam irradiates the bottom of the cylindrical lithium battery casing and the bare cell end face through the dust removal port 34 to perform welding. During this process, the laser melts the aluminum shell and generates a large number of welding slag particles. The external dust removal equipment generates negative pressure. Under the drive of negative pressure, the welding slag particles pass through the dust removal port 34, the second interlayer cavity 35, the first interlayer cavity 13 and the flow channel 21 in sequence, and finally enter the welding slag collection equipment.

[0033] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

[0034] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

Claims

1. A vertical laser welding dust removal device for cylindrical lithium batteries, characterized in that, include: The dust removal mechanism body is a sleeve-shaped structure, including a sleeve wall, a first cavity is provided in the sleeve wall to form a dust removal air duct, and a central channel is formed by the sleeve wall, which runs through the upper and lower end faces of the dust removal mechanism body. The dust removal pipe is connected to the dust removal mechanism body. The dust removal pipe includes a flow channel in the middle for fluid to pass through. One end of the flow channel is connected to the first cavity, and the other end is connected to the external dust removal equipment. A fixed base is connected to the lower end of the dust removal mechanism body. A second cavity communicating with the first cavity is provided in the fixed base. A laser channel is connected to the upper side of the second cavity, and a dust removal port is connected to the lower side of the second cavity corresponding to the laser channel, which is used to suck in the welding slag generated in the welding area and introduce it into the second cavity.

2. The cylindrical lithium battery vertical laser welding dust removal device as described in claim 1, characterized in that, The sleeve wall includes an outer wall and an inner wall, and a first interlayer cavity formed between the outer wall and the inner wall constitutes the first cavity.

3. The cylindrical lithium battery vertical laser welding dust removal device as described in claim 2, characterized in that, Both the outer and inner walls have circular cross-sections and are coaxially arranged.

4. The cylindrical lithium battery vertical laser welding dust removal device as described in claim 3, characterized in that, The dust removal mechanism body is frustum-shaped, with the smaller diameter end of the dust removal mechanism body facing downwards.

5. The vertical laser welding dust removal device for cylindrical lithium batteries as described in claim 1, characterized in that, There are two dust removal pipes, which are symmetrically arranged on the left and right sides of the dust removal mechanism body.

6. The cylindrical lithium battery vertical laser welding dust removal device as described in claim 1, characterized in that, The fixed base includes a horizontally arranged first fixed plate, which is adapted to the bottom of the inner wall in shape and size, and is fixed to the bottom surface of the inner wall in close contact; a second fixed plate is arranged parallel to the lower side of the first fixed plate, and the outer wall extends downward to the upper surface of the second fixed plate, and the bottom surface of the outer wall is connected to the upper surface of the second fixed plate.

7. The cylindrical lithium battery vertical laser welding dust removal device as described in claim 6, characterized in that, The second cavity is formed between the first fixing plate and the second fixing plate.

8. The vertical laser welding dust removal device for cylindrical lithium batteries as described in claim 6, characterized in that, The downward-facing projection surface of the dust removal port completely covers the downward-facing projection surface of the laser channel.

9. A vertical laser welding dust removal device for cylindrical lithium batteries as described in any one of claims 1-8, characterized in that, The dust removal port is cross-shaped.

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