A polymer lithium ion battery tab welding dynamic dust removal device

Abstract

The present application belongs to the technical field of polymer lithium ion battery tab welding packaging, and particularly relates to a polymer lithium ion battery tab welding dynamic dust removal device, which comprises a frame, a rotating platform, a positioning mechanism and a dust suction mechanism; the rotating platform is arranged on the frame, and multiple positioning mechanisms are arranged on the rotating platform; the dust suction mechanism is arranged on the frame and connected with a negative pressure mechanism; the positioning mechanism comprises a mounting seat, a positioning carrier and a rotating drive mechanism; the mounting seat is arranged close to the edge of the rotating platform, the positioning carrier is rotationally connected to the mounting seat, and the rotating drive mechanism is connected to the positioning carrier and used for driving the positioning carrier to overturn, so that the tab of the battery cell positioned in the positioning carrier extends downwardly into the dust suction mechanism. Since the tabs are downward, the gap formed between the tabs is downward under the action of gravity, so that the metal dust adsorbed between the tabs can be easily removed, the metal dust removal effect is improved, internal short circuit of the battery is avoided, and the battery performance is improved.

Description

Technical Field

[0001] This invention belongs to the field of polymer lithium-ion battery tab welding and packaging technology, and particularly relates to a dynamic dust removal device for polymer lithium-ion battery tab welding. Background Technology

[0002] Power batteries are a crucial component of current new energy sources; power batteries include aluminum-cased batteries and pouch batteries. Pouch batteries consist of cells placed in sealed bags with welded membranes, then infused with electrolyte. The cells of pouch batteries are made by stacking multiple layers of thin films, with the tabs of the stacked cells welded together. Because dust accumulates during the cutting of the stacked films, as well as airborne dust, the welding of the tabs results in dust contamination within the tabs. This dust affects the conductivity of the tabs, the quality of the cell, and can even pose safety hazards, such as puncturing the separator during charging and discharging, causing internal short circuits, overheating, or even explosions in lithium-ion batteries. Therefore, cleaning the dust on the tabs is necessary, typically using vacuum suction. Currently, the cell tab welding is performed within a mold on a turntable, with the cells horizontally positioned. The vacuuming mechanism extends horizontally towards the tab section of the cell. However, this horizontal suction of dust within the tabs can leave some dust unremoved. Summary of the Invention

[0003] The purpose of this invention is to provide a dynamic dust removal device for welding tabs of polymer lithium-ion batteries, which solves the problem that dust remains on the film of the tabs during the welding of the cell tabs of soft-pack batteries. This dust can cause the separator to break down during charging and discharging, resulting in internal short circuits, overheating, high temperatures, or even explosions in the lithium-ion battery.

[0004] To achieve the above objectives, this invention provides a dynamic dust removal device for welding tabs of polymer lithium-ion batteries, comprising a frame, a rotating platform, a positioning mechanism, and a dust collection mechanism; the rotating platform is disposed on the frame, and multiple positioning mechanisms are disposed on the rotating platform; the dust collection mechanism is disposed on the frame and connected to a negative pressure mechanism; the positioning mechanism includes a mounting base, a positioning carrier, and a rotation drive mechanism; the mounting base is disposed near the edge of the rotating platform, the positioning carrier is rotatably connected to the mounting base, and the rotation drive mechanism is connected to the positioning carrier for driving the positioning carrier to rotate, so that the tabs of the battery cells positioned in the positioning carrier extend downwards into the dust collection mechanism.

[0005] Furthermore, the rotary drive mechanism drives the positioning carrier to flip, so that the battery cell inside the positioning carrier extends vertically into the vacuuming mechanism.

[0006] Furthermore, the positioning carrier includes a connecting seat, a vertical plate, a lifting component, and a pressure plate; the connecting seat connects the mounting base and the rotary drive mechanism, and a positioning mold is provided on the connecting seat for positioning the battery cell, and the positioning mold is provided with a clearance position to avoid the battery cell's tabs; the vertical plate is located at one end of the connecting seat, and the lifting component is located on one side of the vertical plate and connected to the pressure plate, for driving the pressure plate to press the battery cell into the positioning mold.

[0007] Furthermore, the lifting component is a lifting cylinder disposed on one side of the upright plate, and a guide rail is disposed on the other side of the upright plate, with the pressure plate slidably connected to the guide rail.

[0008] Furthermore, the connecting seat includes a rotating shaft rotatably connected to the mounting seat and an eccentric connecting part, the positioning mold is connected to the eccentric connecting part, and the rotary drive mechanism is connected to the rotating shaft.

[0009] Furthermore, the vacuuming mechanism includes a lifting mechanism, a parallel clamp, and a vacuum hood; the lifting mechanism is mounted on the frame, the parallel clamp is mounted on the upper end of the lifting mechanism, the parallel clamp includes two grippers, each gripper is provided with a vacuum hood, the parallel clamp drives the two vacuum hoods to clamp the electrode tabs, and the vacuum hoods are connected to the negative pressure mechanism.

[0010] Furthermore, the two dust hoods are provided with cavities on opposite sides, and the top of the cavity is provided with an air-proof notch for the air-proof tab.

[0011] Furthermore, the top of the dust cover also extends upwards with a clamping part for contacting and adhering to the outer surface of the battery cell.

[0012] Furthermore, each of the vacuum cleaner hoods is rotatably connected to a brush inside its cavity, and a motor for driving the brush to rotate is provided on the outside of the vacuum cleaner hood.

[0013] Furthermore, the rotating platform includes a divider, a turntable, a motor, and a rotary joint; the divider is mounted on the frame, the turntable is mounted on the divider, and the motor is connected to the divider.

[0014] The above-mentioned one or more technical solutions in the dynamic dust removal device for polymer lithium-ion battery electrode welding provided in this embodiment of the invention have at least the following technical effects:

[0015] 1. The stacked battery cells are positioned in the positioning carrier. When the battery cells are rotated to the side of the dust collection mechanism by the rotating platform, the positioning carrier is flipped by the rotating drive mechanism, so that the battery cell tabs extend downward into the dust collection mechanism. The dust collection mechanism creates negative pressure to suck away the dust on the tabs. Since the tabs are downward, under the action of gravity, and the gaps formed between the electrodes are also downward, it is easy to remove the metal dust adsorbed between the electrodes, increase the effect of metal dust removal, avoid internal short circuits in the battery, and improve battery performance.

[0016] 2. When the dust removal mechanism removes dust from the electrode tabs, it can drive the positioning carrier to make a pendulum motion through the rotation drive mechanism, thereby shaking off the dust on the electrode tabs and making it easier to remove the dust from the electrode tabs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural diagram of the dynamic dust removal device for welding polymer lithium-ion battery tabs provided in an embodiment of the present invention.

[0019] Figure 2 This is a structural diagram of the positioning mechanism of the dynamic dust removal device for welding the tabs of polymer lithium-ion batteries provided in an embodiment of the present invention, in its vertical state.

[0020] Figure 3 This is a structural diagram of the positioning mechanism of the dynamic dust removal device for welding the tabs of polymer lithium-ion batteries provided in an embodiment of the present invention.

[0021] Figure 4 This is a structural diagram of the dust collection mechanism of the dynamic dust removal device for welding the tabs of polymer lithium-ion batteries provided in an embodiment of the present invention.

[0022] Figure 5 A structural diagram showing a brush installed inside the dust collection hood of a dynamic dust removal device for welding polymer lithium-ion battery tabs provided in an embodiment of the present invention. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0024] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0027] In one embodiment of the present invention, reference is made to... Figures 1-3A dynamic dust removal device for welding tabs of polymer lithium-ion batteries is disclosed. This device is used in equipment for welding the tabs of pouch batteries after the cells are stacked into cells using thin films. Before the tabs of the cells are welded into a single unit, the device removes dust from the thin films forming the tabs within the cells. The pouch battery tab welding equipment includes a frame (not shown in the drawings), a rotating platform 100, a positioning mechanism 200, and a dust collection mechanism 300. The rotating platform 100 is mounted on the frame, and multiple positioning mechanisms 200 are mounted on the rotating platform 100. The dust collection mechanism 300 is mounted on the frame and connected to a negative pressure mechanism. The positioning mechanism 200 includes a mounting base 210, a positioning carrier 220, and a rotation drive mechanism 230. The mounting base 210 is located near the edge of the rotating platform 200. The positioning carrier 220 is rotatably connected to the mounting base 210. The rotation drive mechanism 230 is connected to the positioning carrier 220 and is used to drive the positioning carrier 220 to rotate, so that the tabs of the battery cell located in the positioning carrier 220 extend downward into the vacuuming mechanism 300. This dynamic dust removal device for polymer lithium-ion battery tab welding positions the stacked battery cells within a positioning carrier 220 during tab welding. A rotating platform 200 drives the cell to rotate to one side of the dust collection mechanism 300. A rotation drive mechanism 230 then drives the positioning carrier 220 to flip, causing the battery cell tabs to extend downwards into the dust collection mechanism 300. The dust collection mechanism 300 creates negative pressure to remove dust from the tabs. Because the tabs are downwards, and due to gravity and the downward-facing gaps between the multiple layers of positive and negative electrodes, dust is easily removed from the tab area, increasing the dust removal effect and improving battery performance. Furthermore, during the vacuuming process, the rotary drive mechanism 230 drives the positioning carrier 220 to swing like a pendulum, causing the dust between the battery cell tabs and the tab layers to be shaken off as much as possible and instantly sucked away by the vacuuming mechanism 300. This facilitates the removal of metal dust adsorbed between the electrode plates, increases the effectiveness of metal dust removal, avoids internal short circuits in the battery, and improves battery performance. After the dust on the tabs is removed, the rotary platform 200 drives the battery cell to rotate to the welding position, thereby completing the welding of the battery cell tabs.

[0028] Furthermore, refer to Figures 1-3 The rotary drive mechanism 230 drives the positioning carrier 220 to flip, causing the battery cell inside the positioning carrier 220 to extend vertically into the vacuuming mechanism 300. In this embodiment, the battery cell's tabs face downwards, making it easier for the vacuuming mechanism 300 to remove dust from the tabs. Furthermore, under the downward suction force of the suction mechanism 300, the tabs can be pulled downwards and straightened, achieving a pneumatic correction effect on the tabs and facilitating subsequent welding and forming of the tabs.

[0029] Furthermore, refer to Figures 1-3The positioning carrier 220 includes a connecting seat 221, a vertical plate 222, a lifting component 223, and a pressure plate 224. The connecting seat 221 connects the mounting base 210 and the rotary drive mechanism 230. A positioning mold 225 is provided on the connecting seat 221 for positioning the battery cell. The positioning mold 225 has clearance positions to prevent the battery cell tabs from being exposed. The vertical plate 222 is located at one end of the connecting seat 221. The lifting component 223 is located on one side of the vertical plate 222 and connected to the pressure plate 224, for driving the pressure plate 224 to press the battery cell into the positioning mold 225. In this embodiment, the stacked battery cells are positioned within the positioning mold 225, and the tabs of the battery cells extend from the clearance position. The lifting member 223 drives the pressure plate 224 to press down, pressing and positioning the battery cells within the positioning mold 225. The rotation drive mechanism 230 drives the positioning mold 225 to rotate, causing the tabs of the battery cells to rotate downward with the positioning mold 225, thereby making the tabs of the battery cells face downward.

[0030] Furthermore, refer to Figures 1-3 The lifting component 223 is a lifting cylinder disposed on one side of the upright plate 222, and a guide rail 226 is disposed on the other side of the upright plate 222. The pressure plate 224 is slidably connected to the guide rail 226. In this embodiment, the pressure plate 224 is driven by the lifting cylinder to slide up and down along the guide rail 226, thereby pressing the battery cell into the positioning mold 225.

[0031] Furthermore, refer to Figures 1-3 The connecting seat 221 includes a rotating shaft rotatably connected to the mounting seat 210 and an eccentric connecting portion. The positioning mold 225 is connected to the eccentric connecting portion, and the rotary drive mechanism 230 is connected to the rotating shaft. In this embodiment, because the positioning mold 225 is connected to the eccentric portion, when the rotary drive mechanism 230 drives the positioning mold 225 to rotate, the positioning mold 225 can be rotated to the outside of the turntable, causing the electrode tabs of the battery cell to rotate downwards towards the vacuuming mechanism 300.

[0032] Furthermore, refer to Figure 4The vacuuming mechanism 300 includes a lifting mechanism 310, a parallel clamp 320, and a vacuum hood 330. The lifting mechanism 310 is mounted on the frame, and the parallel clamp 320 is mounted on the upper end of the lifting mechanism 310. The parallel clamp 320 includes two grippers 321, and each gripper 321 is provided with a vacuum hood 330. The parallel clamp 320 drives the two vacuum hoods 330 to clamp the electrode tabs, and the vacuum hoods 330 are connected to the negative pressure mechanism. In this embodiment, when the battery cell tabs face the dust collection mechanism 300, the lifting mechanism 310 drives the parallel clamp 320 to move upward, so that the two dust collection hoods 330 are located on both sides of the battery cell tabs. Then, the parallel clamp 320 drives the two dust collection hoods 330 to clamp the two sides of the tabs, thereby forming a closed space. Then, the negative pressure mechanism creates a negative pressure inside the dust collection hoods 330 to remove the dust inside the tabs. After the formation is completed, the lifting mechanism 310 can move downward, and the two dust collection hoods 330 clamp the tabs to straighten them downward, thereby achieving further correction of the tabs.

[0033] Furthermore, refer to Figure 4 Each of the two dust hoods 330 has a cavity 331 on its opposite side, and the top of each cavity 331 has a notch 332 for preventing air leakage from the electrode tabs. In this embodiment, when the two dust hoods 330 are clamped together to form a closed cavity, the notch 332 provides air leakage protection for the electrode tabs, preventing them from being deformed or crushed, thus providing excellent protection for the electrode tabs.

[0034] Furthermore, refer to Figure 1 The top of the dust collection hood 330 also extends upward with a clamping part 333 for contacting and adhering to the outer surface of the battery cell. In this embodiment, when the two dust collection hoods 330 clamp each other, the clamping part on the dust collection hood 330 adheres to the battery cell, making the battery cell, the electrode tab, and the dust collection hood 330 form a whole, thereby correcting the position of the electrode tab and the battery cell and improving the overall quality of the battery cell after electrode tab welding.

[0035] For further details, please refer to... Figure 5 Each of the dust collection hoods 330 has a brush 334 rotatably connected inside its cavity 331, and a motor 335 is provided on the outside of the dust collection hood 330 to drive the brush 334 to rotate. In this embodiment, during the dust collection process, the motor drives the brush 334 to rotate, and the rotating brush 334 can brush off the dust inside the electrode tabs, thereby further removing the dust from the electrode tabs and improving battery quality.

[0036] Furthermore, refer to Figure 1The rotating platform 100 includes a divider 101, a turntable 102, a motor 103, and a rotary joint 104. The divider 101 is mounted on the frame, the turntable 102 is mounted on the divider 101, and the motor 103 is connected to the divider 101. In this embodiment, the rotary joint 104 enables electrical and pneumatic connection with each positioning mechanism 200.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A polymer lithium ion battery tab welding dynamic dust removal device, comprising a rack, a rotating platform, a positioning mechanism and a dust removal mechanism; the rotating platform is arranged on the rack, and a plurality of positioning mechanisms are arranged on the rotating platform; the dust removal mechanism is arranged on the rack and connected with a negative pressure mechanism; characterized in that, The positioning mechanism comprises a mounting seat, a positioning carrier and a rotary driving mechanism; the mounting seat is arranged near the edge of the rotary platform, the positioning carrier is rotationally connected to the mounting seat, and the rotary driving mechanism is connected to the positioning carrier to drive the positioning carrier to overturn, so that the tabs of the battery cell positioned in the positioning carrier extend downwardly into the dust suction mechanism; The positioning carrier comprises a connecting seat, a vertical plate, a lifting member and a pressing plate; the connecting seat is connected to the mounting seat and the rotary driving mechanism, and a positioning die is arranged on the connecting seat to position the battery cell, and a clearance is arranged on the positioning die to avoid the tabs of the battery cell; the vertical plate is arranged at one end of the connecting seat, the lifting member is arranged at one side of the vertical plate and connected to the pressing plate to drive the pressing plate to press the battery cell in the positioning die; the rotary driving mechanism drives the positioning die to overturn to the outside of the rotary platform, so that the tabs of the battery cell are turned downwardly to face the dust suction mechanism; The dust suction mechanism comprises a lifting mechanism, a parallel clamp and a dust suction cover; the lifting mechanism is arranged on the rack, the parallel clamp is arranged at the upper end of the lifting mechanism, the parallel clamp comprises two clamping jaws, each clamping jaw is provided with the dust suction cover, the parallel clamp drives the two dust suction covers to clamp the tabs, and the dust suction cover is connected to the negative pressure mechanism.

2. The polymer Li-ion battery tab welding dynamic dust removal device according to claim 1, characterized in that: The rotary driving mechanism drives the positioning carrier to overturn, so that the battery cell in the positioning carrier extends vertically into the dust suction mechanism.

3. The polymer Li-ion battery tab welding dynamic dust removal device according to claim 1, characterized in that: The lifting member is a lifting cylinder arranged at one side of the vertical plate, and the other side of the vertical plate is further provided with a guide rail, and the pressing plate is slidingly connected to the guide rail.

4. The polymer Li-ion battery tab welding dynamic dust removal device according to claim 1, characterized in that: The connecting seat comprises a rotating shaft rotationally connected to the mounting seat and an eccentric connecting portion, the positioning die is connected to the eccentric connecting portion, and the rotary driving mechanism is connected to the rotating shaft.

5. The polymer Li-ion battery tab welding dynamic dust removal device according to claim 4, characterized in that: The opposite sides of the two dust suction covers are provided with cavities, and the top end of the cavity is provided with a clearance for avoiding the tabs.

6. The polymer Li-ion battery tab welding dynamic dust removal device according to claim 5, characterized in that: The top of the dust suction cover further extends upwardly with a clamping portion to contact and fit the outer surface of the battery cell.

7. The polymer Li-ion battery tab welding dynamic dust removal device according to claim 5, characterized in that: A brush is further rotationally connected in the cavity of each dust suction cover, and the outer side of the dust suction cover is provided with a motor to drive the brush to rotate.

8. The polymer Li-ion battery tab welding dynamic dust removal device according to claim 1, characterized in that: The rotary platform comprises a divider, a rotating disc, a motor and a rotary joint; the divider is arranged on the rack, the rotating disc is arranged on the divider, and the motor is connected to the divider.

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