Battery pack needle vacuumizing device

Abstract

This utility model relates to the field of battery processing technology, specifically to a battery pack needle-punching vacuuming device, including a frame, a turntable, a needle-punching mechanism, and a vacuum heat-sealing and trimming mechanism. The turntable is rotatably mounted on the frame and has at least three equally spaced clamping stations. The frame has loading and unloading areas. The needle-punching mechanism and the vacuum heat-sealing and trimming mechanism are sequentially arranged on the frame along the rotation direction of the turntable. The needle-punching mechanism can puncture the air bladders on the battery pack at the corresponding clamping station, and the vacuum heat-sealing and trimming mechanism can vacuum, heat-seal, and trim the air bladders on the battery pack at the corresponding clamping station. This battery pack needle-punching vacuuming device utilizes the needle-punching mechanism to individually puncture the air bladders, which helps reduce operational difficulty; integrating vacuuming, heat-sealing, and trimming processes into the same equipment facilitates centralized cleaning later and reduces maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of battery processing technology, specifically to a battery pack needle-punching vacuum extraction device. Background Technology

[0002] After the electrolyte is injected and the battery has been left to stand during production, it is typically encapsulated by compression. During this initial encapsulation, excess electrolyte and gases generated during production generally form an air pocket. In the subsequent secondary encapsulation, the battery cell undergoes a second processing step, involving processes such as needle puncturing of the air pocket, vacuuming, secondary heat sealing, and edge trimming.

[0003] Currently, when removing waste gas and excess electrolyte from the air bladder of lithium battery cells, vacuum suction equipment is generally used, followed by heat sealing and edge trimming. For example, patent CN201420520115.9 – an in-membrane vacuum extraction device for a soft-pack battery – only performs vacuum extraction near the extraction port of the air bladder to remove gas or liquid. After extraction, the extraction port is heat-sealed. This method is simple and easy to use. However, this device has a complex structure and high manufacturing cost, making it unsuitable for small-scale factory production. Furthermore, when vacuum-extracting electrolyte after puncturing the air bladder, the electrolyte is ejected in a jet-like manner, contaminating the vacuum head and its internal components such as the end cap, piercing blade, pressure plate, and battery positioning plate. This necessitates regular cleaning of the cavity, and the compact design of the entire device makes maintenance difficult. Therefore, a low-cost and easily maintainable device is needed to solve these problems. Utility Model Content

[0004] In order to overcome one of the shortcomings of the existing technology, the purpose of this utility model is to provide a battery pack needle puncture vacuum pumping device. This battery pack needle puncture vacuum pumping device has a simple structure and is easy to maintain.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A battery pack needle-punching and vacuuming device includes a frame, a turntable, a needle-punching mechanism, and a vacuum heat-sealing and trimming mechanism. The turntable is rotatably mounted on the frame and has at least three clamping stations equally divided on it. The frame has a loading and unloading area. The needle-punching mechanism and the vacuum heat-sealing and trimming mechanism are sequentially arranged on the frame along the rotation direction of the turntable. Any clamping station can move with the turntable between the loading and unloading area, the needle-punching mechanism, and the vacuum heat-sealing and trimming mechanism. The needle-punching mechanism can puncture the air bladder on the battery pack at the corresponding clamping station, and the vacuum heat-sealing and trimming mechanism can vacuum, heat-seal, and trim the air bladder of the battery pack at the corresponding clamping station.

[0007] Furthermore, the vacuum heat-sealing and trimming mechanism includes a bracket, a lifting mold body slidably mounted on the bracket, a lifting cylinder, a vacuuming assembly, and a die-cutting assembly. The bracket is mounted on the machine frame, the lifting cylinder is mounted on the top of the bracket and its telescopic end is connected to the lifting mold body, the lifting cylinder can drive the lifting mold body to press against the corresponding clamping station on the turntable to form a sealed cavity, the battery pack is completely placed in the sealed cavity, the vacuuming assembly and the die-cutting assembly are both arranged on the lifting mold body, the vacuuming assembly communicates with the sealed cavity, the cutting end of the die-cutting assembly can extend out of the lower end of the lifting mold body and cooperate with the clamping station to cut off the excess part of the battery pack, and a heat-sealing plate is provided on the bottom of the lifting mold body.

[0008] Furthermore, the die-cutting assembly includes a die and a die-cutting cylinder. An opening is provided on the bottom of the lifting mold body, the die is movably inserted into the opening, and the die is sealed to the inner wall of the opening. The die-cutting cylinder is installed on the top of the lifting mold body.

[0009] Furthermore, an elastic sealing element is provided on the lower periphery of the lifting mold body, which can fit against the periphery of the clamping station. A pressure plate is provided on one side of the lifting mold body located in the sealed cavity. The pressure plate is connected to the top of the sealed cavity through the elastic element. The pressure plate divides the sealed cavity into a suction area and a pressing area. The cutting end of the die-cutting assembly and the suction end of the vacuuming assembly are both located in the suction area. The battery pack body and the heat sealing plate are both located in the pressing area. The cutting end of the die-cutting assembly is located in the area between the heat sealing plate and the pressure plate. When the lifting mold body gradually approaches the clamping station, the top surface of the pressing area presses against the battery pack before the lower end of the pressure plate.

[0010] Furthermore, the vacuum assembly includes a vacuum tube and a vacuum pump. The upper part of the lifting mold is provided with an air extraction hole, which is connected to one end of the vacuum tube, and the vacuum pump is connected to the other end of the vacuum tube.

[0011] Furthermore, the heat-sealing plate is movably inserted into the bottom of the lifting mold body via a guide rod. A return spring is fitted between the heat-sealing plate and the bottom of the lifting mold body on the guide rod. The two ends of the return spring are respectively connected to the heat-sealing plate and the bottom of the lifting mold body. A heating wire is provided on the heat-sealing plate.

[0012] Furthermore, the needle-piercing mechanism includes a mounting frame and a drive cylinder. The mounting frame is mounted on the machine frame, and the drive cylinder is mounted on the mounting frame. A lifting platform is vertically slidably mounted on the mounting frame. The telescopic end of the drive cylinder is connected to the upper end of the lifting platform. A movable guide post is movably inserted into the lifting platform. A pressure plate is provided at the lower end of the movable guide post. The upper end of the movable guide post is connected to the lifting platform through a shock-absorbing spring. A needle is provided on the pressure plate. The pressure plate can press the battery pack on the clamping station and puncture the airbag through the needle.

[0013] Furthermore, the clamping station is equipped with a detachable clamping fixture, which can fix the battery pack.

[0014] Furthermore, a workbench is provided on one side of the frame located in the loading and unloading area.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This utility model discloses a battery pack needle-punching vacuuming device with a turntable structure design, which can realize continuous feeding, needle-punching, vacuuming, heat sealing and edge trimming operations, ensuring work efficiency; the needle-punching mechanism realizes individual needle-punching airbags, which helps to reduce the difficulty of operation; the vacuuming, heat sealing and edge trimming processes are integrated into the same equipment, realizing structural compactness, and at the same time, it can also facilitate centralized cleaning in the later stage, reducing maintenance costs.

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the acupuncture mechanism in an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the vacuum heat-sealing and edge-cutting mechanism in an embodiment of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the vacuum heat-sealing and trimming mechanism in an embodiment of this utility model;

[0022] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0023] Explanation of icon numbers:

[0024] Frame 100, loading and unloading area 110, worktable 120;

[0025] Turntable 200, clamping station 210, clamping fixture 211;

[0026] Needle-punching mechanism 300, mounting bracket 310, drive cylinder 320, lifting platform 330, movable guide column 340, shock-absorbing spring 350, needle 360, and clamping plate 370;

[0027] Vacuum heat sealing and trimming mechanism 400, bracket 410, lifting mold body 420, elastic seal 421, pressure plate 422, lifting cylinder 430, vacuum assembly 440, vacuum tube 441, vacuum pump 442, die-cutting assembly 450, die 451, die-cutting cylinder 452, sealed cavity 460, suction area 461, pressing area 462, heat sealing plate 470, guide rod 471, return spring 472. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0029] Reference Figures 1 to 5 A battery pack needle-punching vacuuming device is shown, comprising a frame 100, a turntable 200, a needle-punching mechanism 300, and a vacuum heat-sealing and trimming mechanism 400. The turntable 200 is rotatably mounted on the frame 100, and at least three clamping stations 210 are equally spaced on the turntable 200. The frame 100 is provided with a loading / unloading area 110. The needle-punching mechanism 300 and the vacuum heat-sealing and trimming mechanism 400 are respectively arranged sequentially on the frame 100 along the rotation direction of the turntable 200. Any clamping station 210 can move with the turntable 200 between the loading / unloading area 110, the needle-punching mechanism 300, and the vacuum heat-sealing and trimming mechanism 400. The needle-punching mechanism 300 can needle the air bladder on the battery pack at the corresponding clamping station 210, and the vacuum heat-sealing and trimming mechanism 400 can vacuum, heat-seal, and trim the air bladder on the battery pack at the corresponding clamping station 210.

[0030] Specifically, in the above embodiments, the vacuum heat-sealing and trimming mechanism 400 integrates vacuuming, heat sealing, and trimming simultaneously; in effect, it combines these three mechanisms into one unit. Preferably, there are three clamping stations 210 in this application. Each clamping station 210 can be moved to the next processing area every 120° rotation of the turntable 200. In this application, the loading and unloading area 110 can be operated manually or by a robotic arm, depending on the actual usage requirements. Furthermore, the turntable 200 actually needs to be equipped with a servo motor for driving rotation. This technical solution is conventional and will not be detailed here.

[0031] Furthermore, in the above embodiments, to facilitate the secondary packaging of battery packs of different specifications, the clamping station 210 is equipped with a detachable clamping fixture 211. The clamping fixture 211 can fix the battery pack, and the clamping fixture 211 and the clamping station 210 are detachable for easy replacement later. In addition, to accommodate semi-automatic processing, i.e., manual loading and unloading, a worktable 120 is provided on one side of the loading and unloading area 110 of the frame 100. The worktable 120 is equipped with a control switch and can be used to place battery packs that have been processed or are not yet processed.

[0032] This battery pack needle-punching vacuuming device adopts a rotary table 200 structure design, which can realize continuous feeding, needle-punching, vacuuming, heat sealing and edge trimming operations, ensuring work efficiency; the needle-punching mechanism 300 realizes individual needle-punching airbags, which helps to reduce the difficulty of operation; the vacuuming, heat sealing and edge trimming processes are integrated into the same equipment, realizing structural compactness, and at the same time, it can also facilitate centralized cleaning in the later stage, reducing maintenance costs.

[0033] See Figures 1 to 2In one embodiment of this application, in order to smoothly puncture the airbag on the battery pack on the clamping fixture 211, the needle puncture mechanism 300 includes a mounting frame 310 and a drive cylinder 320. The mounting frame 310 is mounted on the frame 100, and the drive cylinder 320 is mounted on the mounting frame 310. A lifting platform 330 is vertically slidably mounted on the mounting frame 310. The telescopic end of the drive cylinder 320 is connected to the upper end of the lifting platform 330. A movable guide post 340 is movably inserted on the lifting platform 330. A pressure plate 370 is provided at the lower end of the movable guide post 340. The upper end of the movable guide post 340 is connected to the lifting platform 330 through a shock-absorbing spring 350. A needle 360 ​​is provided on the pressure plate 370. The pressure plate 370 can press the battery pack on the clamping station 210 and puncture the airbag through the needle 360. In this embodiment, the tip of the needle 360 ​​does not protrude from the clamping plate 370. In fact, the clamping plate 370 is provided with a groove, and the needle 360 ​​is located in the groove.

[0034] When the turntable 200 moves the battery pack that has not punctured the airbag to the working area of ​​the needle puncture mechanism 300, the drive cylinder 320 extends and drives the lifting platform 330 to descend. The pressing plate 370 contacts the battery pack and gradually presses it for positioning. As the extension of the drive cylinder 320 increases, the needle 360 ​​gradually punctures the airbag.

[0035] See 1 to Figure 4 In one embodiment of this application, in order to simultaneously achieve vacuuming, heat sealing, and edge trimming, and to facilitate subsequent cleaning, the vacuum heat sealing and edge trimming mechanism 400 includes a support 410, a lifting mold body 420 slidably mounted on the support 410, a lifting cylinder 430, a vacuuming assembly 440, and a die-cutting assembly 450. The support 410 is mounted on the frame 100, and the lifting cylinder 430 is mounted on the top of the support 410 with its telescopic end connected to the lifting mold body 420. The lifting cylinder 430 can drive the lifting mold body 420. The mold body 420 is pressed against the corresponding clamping station 210 on the turntable 200 to form a sealed cavity 460. The battery pack is completely placed in the sealed cavity 460. The vacuuming component 440 and the die-cutting component 450 are both arranged on the lifting mold body 420. The vacuuming component 440 is connected to the sealed cavity 460. The cutting end of the die-cutting component 450 can extend out of the lower end of the lifting mold body 420 and cooperate with the clamping station 210 to cut off the excess part of the battery pack. A heat-sealing plate 470 is provided on the bottom of the lifting mold body 420.

[0036] The lifting mold 420 is a box-like structure with an opening at its lower end. After the lifting mold 420 is attached to the clamping station 210, the lower opening is sealed. The heat-sealing plate 470 can only be properly operated after the vacuuming component 440 has completed vacuuming. Only then will the heat-sealing be performed. After the heat-sealing is completed, the die-cutting component 450 will then operate to remove the excess part of the battery pack.

[0037] See Figures 3 to 5 In the above embodiments, to ensure the tightness of the sealed cavity 460 and the subsequent vacuuming effect, an elastic sealing element 421 is provided on the lower periphery of the lifting mold body 420. The elastic sealing element 421 can fit against the periphery of the clamping station 210. Furthermore, in one embodiment, to ensure the battery pack body and excess parts are relatively fixed during die-cutting and to guarantee the cutting effect, additional measures are taken. The lifting mold 420 is provided with a pressure plate 422 on one side of the sealed cavity 460. The pressure plate 422 is connected to the top of the sealed cavity 460 by an elastic element 423. The pressure plate 422 divides the sealed cavity 460 into a suction area 461 and a pressing area 462. The cutting end of the die-cutting assembly 450 and the suction end of the vacuum assembly 440 are both located in the suction area 461. The battery pack body and the heat-sealing plate 470 are both located in the pressing area 462. The cutting end of the die-cutting assembly 450 is located in the area between the heat-sealing plate 470 and the pressure plate 422. When the lifting mold 420 gradually approaches the clamping station 210, the top surface of the pressing area 462 presses against the battery pack before the lower end of the pressure plate 422. The heat-sealing plate 470 and the pressure plate 422 respectively press the two sides of the battery pack to be cut, so that when the cutting end of the die-cutting assembly 450 presses down to cut, the cut can be made flat. In the actual production process, the clamping area 462 is used to press the battery pack body, while the pressure plate 422 presses the side of the battery pack with the airbag.

[0038] In the above embodiments, to achieve vacuuming, the vacuuming assembly 440 includes a vacuuming tube 441 and a vacuum pump 442. An air extraction port is provided on the upper part of the lifting mold 420, which is connected to one end of the vacuuming tube 441, and the vacuum pump 442 is connected to the other end of the vacuuming tube 441. In practice, the end of the vacuum pump 442 that discharges exhaust gas is connected to a recovery device, facilitating the recovery of waste gas and unabsorbed electrolyte within the airbag.

[0039] Furthermore, in the above embodiments, to better cut the battery pack body and the side with excess airbag, the die-cutting assembly 450 includes a die 451 and a die-cutting cylinder 452. An opening is provided on the bottom of the lifting mold body 420, and the die 451 is movably inserted into the opening, with a sealed connection between the die 451 and the inner wall of the opening. The die-cutting cylinder 452 is mounted on the top of the lifting mold body 420. A sealing ring is provided between the opening and the die 451 to ensure the sealing of the closed cavity 460 and to guarantee the vacuum suction effect.

[0040] In one embodiment, to ensure the heat-sealing effect and adapt to the lifting and lowering movement of the entire lifting mold 420, the heat-sealing plate 470 is movably inserted into the bottom of the lifting mold 420 via a guide rod 471. A return spring 472 is fitted between the guide rod 471 and the bottom of the lifting mold 420. The two ends of the return spring 472 are connected to the bottom of the heat-sealing plate 470 and the bottom of the lifting mold 420, respectively. A heating wire is provided on the heat-sealing plate 470, and the heating wire is connected to an external power source via a wire. The heat-sealing plate 470 actually protrudes from the lower end of the lifting mold 420. This structural design is mainly to ensure that when the lifting mold 420 descends, the heat-sealing plate 470 first contacts and presses against the area of ​​the battery pack that needs to be heat-sealed, thus ensuring smooth contact between the entire battery pack and the lifting mold 420.

[0041] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A battery pack pin vacuuming device, characterized by, The device includes a frame, a turntable, a needle-punching mechanism, and a vacuum heat-sealing and trimming mechanism. The turntable is rotatably mounted on the frame and has at least three equally spaced clamping stations. The frame has loading and unloading areas. The needle-punching mechanism and the vacuum heat-sealing and trimming mechanism are sequentially arranged on the frame along the rotation direction of the turntable. Any clamping station can move with the turntable between the loading and unloading areas, the needle-punching mechanism, and the vacuum heat-sealing and trimming mechanism. The needle-punching mechanism can puncture the air bladder on the battery pack at the corresponding clamping station, and the vacuum heat-sealing and trimming mechanism can vacuum, heat-seal, and trim the air bladder of the battery pack at the corresponding clamping station.

2. The battery pack pin vacuuming device of claim 1, wherein: The vacuum heat-sealing and trimming mechanism includes a bracket, a lifting mold body slidably mounted on the bracket, a lifting cylinder, a vacuuming assembly, and a die-cutting assembly. The bracket is mounted on the machine frame, and the lifting cylinder is mounted on the top of the bracket with its telescopic end connected to the lifting mold body. The lifting cylinder can drive the lifting mold body to press against the corresponding clamping station on the turntable to form a sealed cavity. The battery pack is completely placed inside the sealed cavity. The vacuuming assembly and the die-cutting assembly are both mounted on the lifting mold body. The vacuuming assembly communicates with the sealed cavity. The cutting end of the die-cutting assembly can extend out of the lower end of the lifting mold body and cooperate with the clamping station to cut off the excess part of the battery pack. A heat-sealing plate is provided on the bottom of the lifting mold body.

3. The battery pack pin vacuuming device of claim 2, wherein: The die-cutting assembly includes a die and a die-cutting cylinder. An opening is provided on the bottom of the lifting mold body. The die is movably inserted into the opening and sealed to the inner wall of the opening. The die is installed on the top of the lifting mold body.

4. The battery pack pin vacuuming device of claim 2, wherein: An elastic seal is provided on the lower periphery of the lifting mold body, which can fit against the periphery of the clamping station. A pressure plate is provided on one side of the lifting mold body located in the sealed cavity. The pressure plate is connected to the top of the sealed cavity through the elastic element. The pressure plate divides the sealed cavity into a suction area and a pressing area. The cutting end of the die-cutting assembly and the suction end of the vacuum assembly are both located in the suction area. The battery pack body and the heat sealing plate are both located in the pressing area. The cutting end of the die-cutting assembly is located in the area between the heat sealing plate and the pressure plate. When the lifting mold body gradually approaches the clamping station, the top surface of the pressing area presses against the battery pack before the lower end of the pressure plate.

5. A battery pack needle-punching vacuum extraction device according to claim 2, characterized in that: The vacuum assembly includes a vacuum tube and a vacuum pump. The upper part of the lifting mold is provided with an air extraction hole, which is connected to one end of the vacuum tube, and the vacuum pump is connected to the other end of the vacuum tube.

6. A battery pack needle-punching vacuuming device according to claim 2, characterized in that: The heat-sealing plate is movably inserted into the bottom of the lifting mold body via a guide rod. A return spring is fitted between the heat-sealing plate and the bottom of the lifting mold body on the guide rod. The two ends of the return spring are respectively connected to the heat-sealing plate and the bottom of the lifting mold body. A heating wire is provided on the heat-sealing plate.

7. A battery pack needle-punching vacuuming device according to any one of claims 1-6, characterized in that: The needle-piercing mechanism includes a mounting frame and a drive cylinder. The mounting frame is mounted on a machine frame, and the drive cylinder is mounted on the mounting frame. A lifting platform is vertically slidably mounted on the mounting frame. The telescopic end of the drive cylinder is connected to the upper end of the lifting platform. A movable guide post is movably inserted into the lifting platform. A pressure plate is provided at the lower end of the movable guide post. The upper end of the movable guide post is connected to the lifting platform through a shock-absorbing spring. A needle is provided on the pressure plate. The pressure plate can press the battery pack on the clamping station and puncture the airbag with the needle.

8. A battery pack needle-punching vacuuming device according to any one of claims 1-6, characterized in that: The clamping station is equipped with a detachable clamping fixture, which can fix the battery pack.

9. A battery pack needle-punching vacuuming device according to any one of claims 1-6, characterized in that: The frame is equipped with a worktable on one side of the loading and unloading area.

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