A blue film preheating device for lithium battery production

Abstract

This invention discloses a preheating device for blue film in lithium battery production, comprising a frame, on which a preheating unit and a transmission unit are mounted, and the preheating unit is connected to an external device via the transmission unit. The preheating unit includes a fixed plate fixedly connected to the frame, and a set of telescopic members are fixedly connected to both sides and the top of the fixed plate. Each set of telescopic members is fixedly connected to a U-shaped frame, and a transmission roller is rotatably connected to each U-shaped frame. The transmission rollers are connected to each other via a heat transfer component. A driving component is also provided on the fixed plate to drive the transmission rollers on multiple U-shaped frames to move synchronously. This invention, through the coordinated use of the transmission unit and the preheating unit, enables the preheating unit to provide auxiliary heating to the blue film during the conveying process, preventing the adhesion of the blue film from decreasing due to low temperature during subsequent processing, thus ensuring the quality of subsequent processing of the blue film.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery production technology, specifically a blue film preheating device for lithium battery production. Background Technology

[0002] During the lithium battery manufacturing process, particularly during the encapsulation process, the adhesive at the bottom of the encapsulation layer may lift up. For example, according to patent document CN216970175U, a blue film conveying device and a lithium battery pack blue film device are disclosed. The blue film conveying device includes a machine body, a roll, a film pulling assembly, a first conveying assembly, a second conveying assembly, and a film cutting assembly. The roll is mounted on the machine body and is suitable for holding the blue film roll. The film pulling assembly has a suction roller and a first rotary drive component. The outer circumferential surface of the suction roller is suitable for adsorbing the blue film. The first rotary drive component is connected to the suction roller to drive the suction roller to rotate and pull the film from the blue film roll. The first conveying assembly has a first suction conveyor belt, which is positioned adjacent to the suction roller to receive and convey the blue film from the suction roller. The second conveying assembly has a second suction conveyor belt, which is positioned adjacent to the first suction conveyor belt to receive the blue film from the first suction conveyor belt. The film cutting assembly is mounted on the machine body to cut the blue film on the first suction conveyor belt according to a preset length. This enables continuous film feeding, improving lithium battery packaging efficiency and ensuring packaging quality;

[0003] However, due to the lack of a heating device, the adhesive on the blue film becomes less viscous in cold weather. As a result, during the subsequent lithium battery encapsulation process, the adhesive at the bottom of the encapsulation layer will lift up due to the reduced adhesiveness. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a blue film preheating device for lithium battery production, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a blue film preheating device for lithium battery production, comprising a frame, wherein a preheating unit and a transmission unit are disposed on the frame, and the preheating unit is connected to an external device via the transmission unit.

[0006] The preheating unit includes a fixed plate that is fixedly connected to the frame. A set of expansion joints is fixedly connected to both sides and the top of the fixed plate. Each set of expansion joints is fixedly connected to a U-shaped frame. A transmission roller is rotatably connected to each U-shaped frame. The transmission rollers are connected to each other through a heat transmission component. A driving component is also provided on the fixed plate. The driving component is used to drive the transmission rollers on multiple U-shaped frames to move synchronously.

[0007] Preferably, the expansion joint is provided in three sets, of which two sets of expansion joints are located in the horizontal direction and are symmetrically arranged with the fixed plate as the center, and one set of expansion joints is located in the vertical direction and at the center connection of the two sets of expansion joints in the horizontal direction; each set of expansion joints has two components.

[0008] Preferably, the telescopic device includes a cylindrical body fixedly connected to a fixed plate, and a support spring and a support block are movably arranged inside the cylindrical body. The support block is fixedly connected to a support rod, and the support rod is fixedly connected to a U-shaped frame.

[0009] Preferably, the heat transmission component includes a transmission belt with a heating wire embedded inside. The inner side of the transmission belt is symmetrically formed with track grooves, and a conductive layer is fixedly connected inside each track groove. The conductive layer in one track groove is connected to the positive electrode of the heating wire, and the conductive layer in the other track groove is connected to the negative electrode of the heating wire. Conductive rings are also symmetrically fixedly connected on the U-shaped frame. Both conductive rings are movably sleeved relative to the transmission roller. The two conductive rings are respectively partially located inside the two track grooves and are in contact with the conductive layer.

[0010] Preferably, the conductive ring includes a circular ring portion and a fixed portion integral with the circular ring portion; wherein the circular ring portion is movably sleeved with the transmission roller, the fixed portion is fixedly connected to the U-shaped frame, and a locking screw is threaded into the screw hole on the fixed portion.

[0011] Preferably, the driving component includes a drive motor fixedly connected to a fixed plate, a bottom output shaft of the drive motor fixedly connected to a drive worm, a drive worm rotatably connected to the fixed plate, a drive worm meshing with a drive worm wheel, a drive worm wheel fixedly connected to a drive shaft, a drive shaft rotatably connected to the fixed plate, drive gears symmetrically fixedly connected to the drive shaft, each drive gear meshing with two corresponding drive racks, and the two drive racks fixedly connected to two U-shaped frames located in the horizontal direction; the top output shaft of the drive motor is fixedly connected to a screw, the screw is threadedly connected to a screw barrel, the screw barrel is connected to an elastic element, and the elastic element is connected to a U-shaped frame located in the vertical direction.

[0012] Preferably, the elastic element includes a plate body fixedly connected to the screw cylinder, and guide rods are slidably connected in two through holes on the plate body. The two guide rods are fixedly connected to a U-shaped frame located in the vertical direction, and guide springs are wrapped around the two guide rods. The guide springs are located between the U-shaped frame and the plate body.

[0013] Preferably, the transmission unit includes three transmission gears, which are connected by a gear-type conveyor belt. One transmission gear is fixedly connected to an external device, another transmission gear is fixedly connected to a transmission roller in the preheating unit, and the last transmission gear is rotatably connected to a slider. The rod hole on the slider is slidably connected to a slide rod. A telescopic spring is wrapped around the slide rod, which is located inside the gear-type conveyor belt. The slide rod is fixedly connected to a slide groove, which is opened on the frame, and the slider is slidably connected to the slide groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1) During operation, the transmission unit and the preheating unit work together to drive the preheating unit to provide auxiliary heating to the blue film during the conveying process. This prevents the blue film from losing its viscosity due to low temperature during subsequent processing, thus ensuring the quality of subsequent processing of the blue film.

[0016] 2) During operation, by using the drive components and elastic components in combination, the effective heating area of ​​the transmission belt on the blue film in the preheating unit can be changed according to actual needs, thereby extending the effective heating time of the blue film and improving the heating effect. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0018] In the attached diagram:

[0019] Figure 1 This is a schematic diagram of a blue film preheating device for lithium battery production according to the present invention.

[0020] Figure 2 This is a front view structural diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the separate structure of the transmission unit and the preheating unit of the present invention;

[0022] Figure 4 This is a schematic diagram of the transmission unit structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the preheating unit structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the telescopic device structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the conductive ring structure of the present invention;

[0026] Figure 8 This is a schematic diagram of the drive component structure of the present invention;

[0027] Figure 9 This is a schematic diagram of the elastic element structure of the present invention;

[0028] In the diagram: 1. Frame; 2. Preheating unit; 201. Fixing plate; 202. Expansion joint; 2021. Cylinder; 2022. Support spring; 2023. Support block; 2024. Support rod; 203. U-shaped frame; 204. Transmission roller; 205. Heat transfer component; 2051. Transmission belt; 2052. Track groove; 2053. Conductive layer; 206. Conductive ring; 2061. Circular part; 2062. Fixing part; 2063. Locking screw; 3. Transmission unit; 301, transmission gear; 302, gear conveyor belt; 303, slider; 304, slide bar; 305, telescopic spring; 306, slide groove; 4. Drive component; 401, drive motor; 402, drive worm; 403, drive worm wheel; 404, drive shaft; 405, drive gear; 406, drive rack; 407, screw; 408, screw barrel; 5. Elastic component; 501, plate; 502, guide rod; 503, guide spring. Detailed Implementation

[0029] 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. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] Example 1, by Figure 1-3 The present invention relates to a blue film preheating device for lithium battery production, comprising a frame 1, a preheating unit 2 and a transmission unit 3 disposed on the frame 1, wherein the preheating unit 2 is connected to an external device via the transmission unit 3.

[0031] The preheating unit 2 includes a fixed plate 201 fixedly connected to the frame 1. A set of telescopic members 202 are fixedly connected to both sides and the top of the fixed plate 201. Each set of telescopic members 202 is fixedly connected to a U-shaped frame 203. A transmission roller 204 is rotatably connected to each U-shaped frame 203. The transmission rollers 204 are connected to each other through a heat transmission component 205. The fixed plate 201 is also provided with a driving component 4, which is used to drive the transmission rollers 204 on multiple U-shaped frames 203 to move synchronously.

[0032] This design mounts the device onto an external device via frame 1. Since the blue film has adhesive on its surface, a certain gap needs to be maintained between the two. The external device is a conveyor belt that adsorbs and transports the blue film. The transmission unit 3 drives one of the transmission rollers 204 within the preheating unit 2, which in turn drives the heat transfer component 205. The heat transfer component 205 moves synchronously with the external device to heat the blue film, preventing its stickiness from decreasing due to low temperature during subsequent processing, thus ensuring the quality of the blue film's subsequent processing. Alternatively, this device can be used to heat adhesive-free films. Since adhesive-free films have no adhesive on their surface, the heat transfer component 205 can contact the adhesive-free film during installation and assist in its transport.

[0033] Depend on Figure 5-6 As shown, the expansion joint 202 is provided in three sets, two sets of expansion joints 202 are located in the horizontal direction and are symmetrically arranged with the fixed plate 201 as the center, and one set of expansion joints 202 is located in the vertical direction and is located at the center connection of the two sets of expansion joints 202; each set of expansion joints 202 has two components.

[0034] The expansion joint 202 includes a cylindrical body 2021 fixedly connected to a fixed plate 201. A support spring 2022 and a support block 2023 are movably arranged inside the cylindrical body 2021. The support block 2023 is fixedly connected to a support rod 2024, and the support rod 2024 is fixedly connected to a U-shaped frame 203.

[0035] This design facilitates the use of the telescopic device 202 to guide the U-shaped frame 203 in both the horizontal and vertical directions, thereby ensuring the stability of the U-shaped frame 203 during movement.

[0036] Depend on Figure 5 The heat transmission component 205 includes a transmission belt 2051, with a heating wire embedded inside the transmission belt 2051. Symmetrical track grooves 2052 are formed on the inner side of the transmission belt 2051. A conductive layer 2053 is fixedly connected inside each track groove 2052. The conductive layer 2053 in one track groove 2052 is connected to the positive electrode of the heating wire, and the conductive layer 2053 in the other track groove 2052 is connected to the negative electrode of the heating wire. A conductive ring 206 is also symmetrically fixedly connected to the U-shaped frame 203. Both conductive rings 206 are movably sleeved relative to the transmission roller 204. The two conductive rings 206 are partially located inside the two track grooves 2052 and are in contact with the conductive layer 2053.

[0037] This design connects two conductive rings 206 to an external power source, and then the two conductive rings 206 supply power to the heating wire in the transmission belt 2051 through their respective conductive layers 2053. This ensures power supply without affecting the movement of the transmission belt 2051. At the same time, the two conductive rings 206 can engage with the two track grooves 2052 in the transmission belt 2051 to prevent the transmission belt 2051 from shifting during movement.

[0038] Depend on Figure 7 As shown, the conductive ring 206 includes an annular portion 2061 and a fixing portion 2062 integral with the annular portion 2061; wherein the annular portion 2061 is movably sleeved with the transmission roller 204, the fixing portion 2062 is fixedly connected to the U-shaped frame 203, and a locking screw 2063 is threaded into the screw hole on the fixing portion 2062.

[0039] This design makes it easy to fix the external wires to the fixing part 2062 on the conductive ring 206 by using the locking screw 2063, which is more convenient when connecting to the power supply.

[0040] Depend on Figure 8 As shown, the driving component 4 includes a driving motor 401 fixedly connected to the fixed plate 201. The bottom output shaft of the driving motor 401 is fixedly connected to the driving worm 402. The driving worm 402 is rotatably connected to the fixed plate 201. The driving worm 402 is meshed with the driving worm wheel 403. The driving worm wheel 403 is fixedly connected to the driving shaft 404. The driving shaft 404 is rotatably connected to the fixed plate 201. The driving shaft 404 is symmetrically fixedly connected with driving gears 405. Each driving gear 405 is meshed with two corresponding driving racks 406. The two driving racks 406 are respectively fixedly connected to two U-shaped frames 203 located in the horizontal direction. The top output shaft of the driving motor 401 is fixedly connected to the screw 407. The screw 407 is threadedly connected to the screw barrel 408. The screw barrel 408 is connected to the elastic element 5. The elastic element 5 is connected to the U-shaped frame 203 located in the vertical direction.

[0041] This design allows the drive motor 401 to drive the drive worm 402 to rotate, which in turn drives the drive shaft 404 to rotate via the drive worm wheel 403. The drive shaft 404 then drives the drive gear 405 on it to rotate, which in turn drives the two corresponding drive racks 406 to move, causing the two drive racks 406 to move closer or further apart. The two drive racks 406 then drive the transmission rollers 204 on the two horizontal U-shaped frames 203 to move closer or further apart. At the same time, the drive motor 401 drives the screw 407 to rotate, which in turn drives the screw barrel 408 to move vertically. The screw barrel 408, through the elastic element 5, drives the transmission rollers 204 inside the vertical U-shaped frame 203 to move vertically.

[0042] Specifically, when the two horizontal drive rollers 204 approach each other, the vertical drive roller 204 moves upward; when the two horizontal drive rollers 204 move away from each other, the vertical drive roller 204 moves downward. In this way, by changing the position of different drive rollers 204, the contact area between the drive belt 2051 and the blue film can be changed, thereby changing the effective heating area of ​​the blue film to meet the actual needs.

[0043] Depend on Figure 9 As shown, the elastic element 5 includes a plate 501 fixedly connected to the screw cylinder 408. Guide rods 502 are slidably connected in two through holes on the plate 501. Both guide rods 502 are fixedly connected to the U-shaped frame 203 located in the vertical direction. Guide springs 503 are wrapped around both guide rods 502. The guide springs 503 are located between the U-shaped frame 203 and the plate 501.

[0044] This design, through the elastic element 5, ensures that the screw barrel 408 and the corresponding U-shaped frame 203 are always elastically connected, thus guaranteeing the tension of the transmission belt 2051 and ensuring the stability of the transmission belt 2051 during movement.

[0045] Depend on Figure 4 As shown, the transmission unit 3 includes three transmission gears 301, which are connected by a gear-type conveyor belt 302. One transmission gear 301 is fixedly connected to an external device, another transmission gear 301 is fixedly connected to a transmission roller 204 in the preheating unit 2, and the last transmission gear 301 is rotatably connected to a slider 303. The rod hole on the slider 303 is slidably connected to a slide rod 304. A telescopic spring 305 is wrapped around the slide rod 304 and is located inside the gear-type conveyor belt 302. The slide rod 304 is fixedly connected to a slide groove 306, which is opened on the frame 1, and the slider 303 is slidably connected to the slide groove 306.

[0046] The transmission gear 301 on the conveyor belt device for adsorbing and conveying the blue film drives the gear conveyor belt 302 to move. The gear conveyor belt 302 then drives the transmission gear 301 on the transmission roller 204 in the preheating unit 2, thereby driving the preheating unit 2. The tension spring 305 ensures that the gear conveyor belt 302 remains taut even when the effective heating area of ​​the transmission belt 2051 and the blue film changes, thus ensuring the stability of driving the preheating unit 2.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blue film preheating device for lithium battery production, comprising a frame (1), characterized in that, The frame (1) is provided with a preheating unit (2) and a transmission unit (3), and the preheating unit (2) is connected to an external device through the transmission unit (3). The preheating unit (2) includes a fixed plate (201) fixedly connected to the frame (1). A set of telescopic devices (202) are fixedly connected to both sides and the top of the fixed plate (201). Each set of telescopic devices (202) is fixedly connected to a U-shaped frame (203). A transmission roller (204) is rotatably connected to each U-shaped frame (203). The transmission rollers (204) are connected to each other through a heat transmission component (205). A driving component (4) is also provided on the fixed plate (201). The driving component (4) is used to drive the transmission rollers (204) on multiple U-shaped frames (203) to move synchronously. The heat transmission component (205) includes a transmission belt (2051), in which a heating wire is embedded. The inner side of the transmission belt (2051) is symmetrically formed with track grooves (2052). Each track groove (2052) is fixedly connected with a conductive layer (2053). The conductive layer (2053) in one track groove (2052) is connected to the positive electrode of the heating wire, and the conductive layer (2053) in the other track groove (2052) is connected to the negative electrode of the heating wire. The U-shaped frame (203) is also symmetrically fixedly connected with conductive rings (206). Both conductive rings (206) are movably sleeved relative to the transmission roller (204). The two conductive rings (206) are respectively partially located inside the two track grooves (2052) and are in contact with the conductive layer (2053).

2. The blue film preheating device for lithium battery production according to claim 1, characterized in that: The expansion joint (202) is provided in three sets, of which two sets of expansion joints (202) are located in the horizontal direction and are symmetrically arranged with the fixed plate (201) as the center, and one set of expansion joints (202) is located in the vertical direction and at the center connection of the two sets of expansion joints (202) in the horizontal direction; the number of expansion joints (202) in each set is two.

3. The blue film preheating device for lithium battery production according to claim 2, characterized in that: The telescopic device (202) includes a cylindrical body (2021) fixedly connected to a fixed plate (201). A support spring (2022) and a support block (2023) are movably arranged inside the cylindrical body (2021). The support block (2023) is fixedly connected to a support rod (2024), and the support rod (2024) is fixedly connected to a U-shaped frame (203).

4. The blue film preheating device for lithium battery production according to claim 1, characterized in that: The conductive ring (206) includes an annular portion (2061) and a fixing portion (2062) integral with the annular portion (2061); wherein the annular portion (2061) is movably sleeved with the transmission roller (204), the fixing portion (2062) is fixedly connected to the U-shaped frame (203), and a locking screw (2063) is threaded into the screw hole on the fixing portion (2062).

5. The blue film preheating device for lithium battery production according to claim 1, characterized in that: The driving component (4) includes a drive motor (401) fixedly connected to the fixed plate (201), the bottom output shaft of the drive motor (401) fixedly connected to the drive worm (402), the drive worm (402) rotatably connected to the fixed plate (201), the drive worm (402) meshing with the drive worm wheel (403), the drive worm wheel (403) fixedly connected to the drive shaft (404), the drive shaft (404) rotatably connected to the fixed plate (201), and symmetrical fixed connections on the drive shaft (404). A drive gear (405) is connected, and each drive gear (405) is meshed with two corresponding drive racks (406). The two drive racks (406) are fixedly connected to two U-shaped frames (203) located in the horizontal direction. The top output shaft of the drive motor (401) is fixedly connected to the screw (407). The screw (407) is threadedly connected to the screw barrel (408). The screw barrel (408) is connected to the elastic element (5). The elastic element (5) is connected to the U-shaped frame (203) located in the vertical direction.

6. The blue film preheating device for lithium battery production according to claim 5, characterized in that: The elastic element (5) includes a plate (501) fixedly connected to the screw cylinder (408). Guide rods (502) are slidably connected in two through holes on the plate (501). Both guide rods (502) are fixedly connected to a U-shaped frame (203) located in the vertical direction. Guide springs (503) are wrapped around both guide rods (502). The guide springs (503) are located between the U-shaped frame (203) and the plate (501).

7. The blue film preheating device for lithium battery production according to claim 1, characterized in that: The transmission unit (3) includes three transmission gears (301), which are connected by a gear-type conveyor belt (302). One of the transmission gears (301) is fixedly connected to an external device, another transmission gear (301) is fixedly connected to a transmission roller (204) in the preheating unit (2), and the last transmission gear (301) is rotatably connected to a slider (303). The rod hole on the slider (303) is slidably connected to a slide rod (304). A telescopic spring (305) is wrapped around the slide rod (304). The telescopic spring (305) is located inside the gear-type conveyor belt (302). The slide rod (304) is fixedly connected to a slide groove (306). The slide groove (306) is opened on the frame (1), and the slider (303) is slidably connected to the slide groove (306).

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