Packaging mechanism for improving poor secondary packaging of soft package lithium battery

Abstract

The utility model discloses a packaging mechanism which comprises a bottom plate, an infrared heater, a fixing support, a first gantry support located above the bottom plate, a rotating disc installed on the bottom plate in a horizontally rotating mode, an upper heat sealing assembly installed on the first gantry support, a lower heat sealing assembly installed on the bottom plate and a vacuumizing assembly installed on the bottom plate. The vacuumizing assembly is located beside the rotating disc. And the first gantry bracket stretches across one side of the turntable and is assembled and connected with the bottom plate. The fixing support stretches across the other side opposite to the rotary disc and is connected with the bottom plate in an assembling mode. The infrared heater is installed on the fixing support and located above the rotating disc correspondingly, the rotating disc is provided with a plurality of bearing stations which are separated from one another and aligned in the rotating direction of the rotating disc, and each bearing station passes through the infrared heater, the upper heat sealing assembly and the lower heat sealing assembly in the rotating process of the rotating disc. The packaging mechanism provided by the utility model effectively improves the secondary packaging effect.

Description

Technical Field

[0001] The utility model relates to the field of soft-pack lithium batteries, in particular to a packaging mechanism for improving poor secondary packaging of soft-pack lithium batteries. Background Art

[0002] As we all know, the packaging of the battery after the electrolyte is injected and formed is called the secondary seal. Due to the penetration and corrosion of the electrolyte on the aluminum-plastic film, part of the electrolyte penetrates into the surface and interior of the aluminum-plastic film, which will affect the secondary seal packaging, and may cause problems such as false seal and leaking seal, which seriously affects the secondary seal efficiency and effectiveness of the battery. At the same time, the hidden dangers of poor secondary seal packaging may lead to subsequent battery leakage problems.

[0003] Therefore, in order to improve the poor secondary packaging of soft-pack lithium batteries and improve the packaging effectiveness without affecting production efficiency, a packaging mechanism for improving the poor secondary packaging of soft-pack lithium batteries is urgently needed. Utility Model Content

[0004] The utility model aims to provide a packaging mechanism for improving the poor secondary packaging of soft-pack lithium batteries, effectively improving the secondary packaging effect without affecting normal production efficiency.

[0005] To achieve the above-mentioned purpose, the utility model improves the packaging mechanism of the second seal of the soft-pack lithium battery, which includes a bottom plate, a first gantry bracket, a turntable, an upper heat sealing component, a lower heat sealing component, a vacuum component, an infrared heater and a fixed bracket. The first gantry bracket is located above the bottom plate, and the first gantry bracket also spans one side of the turntable and is assembled and connected to the bottom plate. The turntable can be horizontally rotatably mounted on the bottom plate, and the turntable has a plurality of mutually separated carrying stations aligned along the rotation direction of the turntable and used to carry soft-pack lithium batteries. The upper heat sealing component is mounted on the first gantry bracket and is located above the turntable, the lower heat sealing component is mounted on the bottom plate and cooperates with the upper heat sealing component, and the vacuum component is mounted on the bottom plate and is located next to the turntable. The fixed bracket spans the other side opposite to the turntable, and the fixed bracket is assembled and connected to the bottom plate. The infrared heater is mounted on the fixed bracket and is located above the turntable. During the rotation of the turntable, each of the carrying stations passes through the infrared heater and the upper and lower heat sealing components.

[0006] Compared with the prior art, with the help of a fixed bracket across the other side of the turntable and an infrared heater installed on the fixed bracket, the fixed bracket allows the infrared heater to be stably suspended above the turntable; and because each bearing station passes through the infrared heater and the upper and lower heat-sealing components during the rotation of the turntable, the infrared heater can perform infrared heating on the soft-pack lithium battery aligned with the infrared heater when the upper and lower heat-sealing components perform heat sealing on the soft-pack lithium battery between the upper and lower heat-sealing components. On the one hand, it does not affect the normal production efficiency, and on the other hand, the electrolyte adsorbed by the CPP at the packaging position and the residual electrolyte are effectively discharged due to the infrared heating, which effectively improves the double-seal packaging effect. In addition, the use of infrared non-contact heating will not damage the surface appearance of the aluminum-plastic film of the soft-pack lithium electronics.

[0007] Preferably, the fixed bracket is in the shape of a "door", and has two vertical frames located on the sides of the turntable and a horizontal frame connected to the vertical frames, the horizontal frame is located above the turntable, and the infrared heater is fixed on the horizontal frame.

[0008] Preferably, there are two carrying stations and the central angle between them is 180 degrees.

[0009] Preferably, the packaging mechanism of the present invention further comprises a rotation driver installed on the bottom plate, the rotation driver is located below the turntable, and the rotation driver is configured to drive the turntable to rotate relative to the bottom plate.

[0010] Preferably, the rotary driver drives the turntable to rotate via belt drive, chain drive or gear drive.

[0011] Preferably, the upper heat sealing assembly includes an upper heat sealing cylinder, an upper and lower lifting seat and an upper heat sealing head, the upper heat sealing cylinder is fixed on the crossbeam of the first gantry bracket, the output end of the upper heat sealing cylinder passes downward through the crossbeam and is assembled and connected to the upper and lower lifting seat, and the upper heat sealing head is assembled on the upper and lower lifting seat from below the upper and lower lifting seat.

[0012] Preferably, the upper heat-sealing cylinders are two separated in a direction in which the first gantry support crosses the turntable.

[0013] Preferably, the vacuum assembly includes a horizontal cylinder and a suction head, the horizontal cylinder is fixed to the base plate by a vertical bracket, the output end of the horizontal cylinder extends horizontally toward the turntable and is assembled and connected to the suction head, and the suction head is also offset upward by a preset distance relative to the turntable.

[0014] Preferably, the lower heat sealing assembly includes a lower heat sealing cylinder and a lower heat sealing head that cooperates with the upper heat sealing head for heat sealing, the lower heat sealing cylinder is fixed to the bottom plate, the output end of the lower heat sealing cylinder is arranged upward, the lower heat sealing head is assembled and connected to the output end of the lower heat sealing cylinder, and the lower heat sealing head is located below the turntable.

[0015] Preferably, the bearing station includes a cavity that passes through the turntable from top to bottom and a plurality of bone bars placed in the cavity and separated from each other by a preset distance, the ends of the bone bars are fixedly connected to the cavity wall of the cavity, and the lower heat sealing head is provided with an avoidance groove for avoiding the bone bars; the upper heat sealing head and the lower heat sealing head are both brass heads. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the packaging mechanism of the utility model.

[0017] Figure 2 It is a plan view showing the relationship between the turntable, the upper heat sealing assembly, the lower heat sealing assembly, the fixing bracket, the infrared heater and the vacuum assembly in the horizontal direction.

[0018] Figure 3 It is a plan view showing the turntable, the fixing bracket and the infrared heater from top to bottom. DETAILED DESCRIPTION

[0019] In order to explain the technical content and structural features of the present invention in detail, further description will be given below in combination with the embodiments and the accompanying drawings.

[0020] See also Figure 1 to Figure 2 The packaging mechanism 100 of the present invention is used to package the soft-pack lithium battery 200 after the electrolyte is injected and formed, so as to achieve the purpose of secondary sealing of the soft-pack lithium battery.

[0021] Recombination Figure 3 The packaging mechanism 100 of the utility model comprises a bottom plate 10, a first gantry support 20, a turntable 40, an upper heat sealing assembly 50, a lower heat sealing assembly 60, a vacuum assembly 70, an infrared heater 80a and a fixing support 80b. The first gantry support 20 is located above the bottom plate 10 so that the first gantry support 20 protrudes upward from the bottom plate 10. Optionally, Figure 1 In the example, the bottom plate 10 is a square to ensure that the length and width of the bottom plate 10 are equal; obviously, according to actual needs, the bottom plate 10 can also be a rectangle, so it is not necessary to Figure 1The first gantry bracket 20 also spans one side of the turntable 40 to meet the need that the turntable 40 is located below the first gantry bracket 20. The first gantry bracket 20 is also assembled and connected with the bottom plate 10, and the bottom plate 10 provides support for the first gantry bracket 20. As an example, fasteners can be used to assemble the first gantry bracket 20 and the bottom plate 10 together. Obviously, according to actual needs, welding can also be used to assemble the first gantry bracket 20 and the bottom plate 10 together. However, these are assembly methods well known in the art, so they will not be described here.

[0022] Meanwhile, the turntable 40 can be horizontally rotatably mounted on the bottom plate 10, and the bottom plate 10 provides support for the rotation of the turntable 40, so that the turntable 40 can rotate around Figure 2 The center line in the middle rotates relative to the bottom plate 10; the turntable 40 has two spaced apart from each other along the rotation direction of the turntable 40 (see Figure 3 The upper heat sealing assembly 50 is aligned with the first gantry support 20 (clockwise or counterclockwise) and is used to carry the carrying station 41 of the soft-pack lithium battery 200, so as to meet the need of each carrying station 41 to carry a soft-pack lithium battery 200. The upper heat sealing assembly 50 is installed on the first gantry support 20, and the first gantry support 20 provides support for the upper heat sealing assembly 50; the upper heat sealing assembly 50 is also located above the corresponding turntable 40. The lower heat sealing assembly 60 is installed on the bottom plate 10, and the bottom plate 10 provides support for the lower heat sealing assembly 60; the lower heat sealing assembly 60 also cooperates with the upper heat sealing assembly 50 to meet the need of the upper heat sealing assembly 50 and the lower heat sealing assembly 60 to heat-seal the soft-pack lithium battery 200 at the carrying station 41 from the upper and lower directions of the soft-pack lithium battery 200. The vacuum assembly 70 is installed on the bottom plate 10 and is located next to the turntable 40. The fixed bracket 80b spans across the other side of the turntable 40, so that the fixed bracket 80b and the first gantry bracket 20 are arranged opposite to each other. Figure 1As shown, the fixed bracket 80b is also assembled and connected with the bottom plate 10, and the bottom plate 10 provides support for the fixed bracket 80b. The infrared heater 80a is installed on the fixed bracket 80b and is located above the corresponding turntable 40. The fixed bracket 80b suspends the infrared heater 80a above the corresponding turntable 40. Therefore, during the rotation of the turntable 40, the rotating turntable 40 causes each carrying station 41 to pass through the infrared heater 80a and the upper and lower heat sealing components 60 to meet the need of "the soft-pack lithium battery 200 is first infrared-heated by the infrared heater 80a before being packaged by the upper and lower heat sealing components 60, and while the infrared heater 80a is infrared-heating one soft-pack lithium battery 200, the upper and lower heat sealing components 60 are packaging the other soft-pack lithium battery 200 that has been infrared-heated". Therefore, the heating of one soft-pack lithium battery 200 by the infrared heater 80a and the packaging of another soft-pack lithium battery 200 by the upper and lower heat sealing components 60 are performed synchronously and independently without interfering with each other. More specifically, as follows:

[0023] like Figure 1 As shown, the fixed bracket 80b is in the shape of a "door", and the fixed bracket 80b has two vertical frames 81 located on the sides of the turntable 40 and a horizontal frame 82 connected to the vertical frames 81. The horizontal frame 82 is designed to support the horizontal frame 82 from both ends; the horizontal frame 82 is located above the turntable to ensure the stability and reliability of the horizontal frame 82 suspended above the turntable 40. At this time, the infrared heater 80a is fixed on the horizontal frame 82, so as to ensure the stability and reliability of the infrared heater 80a suspended on the turntable 40 with the help of the horizontal frame 82.

[0024] like Figures 1 to 3 As shown, when there are two carrying stations 41, the central angle between the two carrying stations 41 is 180 degrees, so that the position exchange operation between the two carrying stations 41 can be realized every time the turntable 40 rotates 180 degrees. Figures 2 to 3 As an example, the carrying station 41 includes a cavity 411 that passes through the turntable 40 from top to bottom and a plurality of bone strips 412 placed in the cavity 411 and separated from each other by a preset distance. The ends of the bone strips 412 are fixedly connected to the cavity wall 4111 of the cavity 411. This design satisfies the carrying station 41 for carrying the soft-pack lithium battery 200, and also facilitates the upper and lower heat sealing components 60 to package the soft-pack lithium battery 200 at the carrying station 41. For example, the cavity 411 is a square cavity, but it is not limited thereto.

[0025] like Figure 1 and Figure 2As shown, the upper heat sealing assembly 50 includes an upper heat sealing cylinder 51, an upper and lower lifting seat 52 and an upper heat sealing head 53. The upper heat sealing cylinder 51 is fixed on the crossbeam 21 of the first gantry bracket 20, and the crossbeam 21 of the first gantry bracket 20 provides support for the upper heat sealing cylinder 51; the output end 511 of the upper heat sealing cylinder 51 passes downward through the crossbeam 21 and is assembled and connected with the upper and lower lifting seat 52. This design can simplify the assembly relationship between the output end 511 of the upper heat sealing cylinder 51 and the upper and lower lifting seat 52. The upper heat sealing head 53 is assembled on the upper and lower lifting seat 52 from the bottom of the upper and lower lifting seat 52 to meet the need of the upper heat sealing cylinder 51 to drive the upper heat sealing head 53 to move up and down through the upper and lower lifting seat 52. Specifically, in Figure 1 As an example, the upper heat sealing cylinders 51 are separated in the direction (indicated by the double arrow B) of the first gantry support 20 across the turntable 40, so that the two upper heat sealing cylinders 51 drive the upper and lower lifting seats 52 to rise and fall from both ends of the upper and lower lifting seats 52, so the upper and lower lifting seats 52 together with the upper heat sealing head 53 can rise and fall more stably and reliably. For example, the upper heat sealing head 53 is a brass head to obtain a more stable heat sealing effect.

[0026] like Figure 2 As shown, the lower heat sealing assembly 60 includes a lower heat sealing cylinder 61 and a lower heat sealing head 62 that cooperates with the upper heat sealing head 53 for heat sealing. The lower heat sealing cylinder 61 is fixed to the bottom plate 10, and the bottom plate 10 provides support for the lower heat sealing cylinder 61; the output end 611 of the lower heat sealing cylinder 61 is arranged upward, and the lower heat sealing head 62 is assembled and connected with the output end 611 of the lower heat sealing cylinder 61. Such an arrangement can simplify the assembly relationship between the output end 611 of the lower heat sealing cylinder 61 and the lower heat sealing head 62; the lower heat sealing head 62 is also located below the turntable 40 to meet the need for the lower heat sealing head 62 to heat-seal the soft-pack lithium battery 200 at the carrying station 41 from below the soft-pack lithium battery 200. For example, as an example, the lower heat sealing head 62 is a brass head to obtain a more stable heat sealing effect. It should be noted that, since the soft-pack lithium battery 200 at the carrying station 41 is carried from below by the bone bar 412, in order to ensure that the lower heat sealing head 62 better cooperates with the upper heat sealing head 53, Figure 2 As an example, an avoidance groove 621 for avoiding the bone strip 412 is provided on the lower heat sealing head 62, so that when the upper and lower heat sealing heads 62 compress and heat-seal the soft-pack lithium battery 200 carried by the bone strip 412, the avoidance groove 621 avoids the bone strip 412, thereby ensuring that the upper and lower heat sealing heads 62 can compress and heat-seal the soft-pack lithium battery 200 carried by the bone strip 412.

[0027] like Figure 1As shown, the packaging mechanism 100 of the present invention further includes a rotation driver 90 installed on the bottom plate 10. The rotation driver 90 is located below the turntable 40. The rotation driver 90 is configured to drive the turntable 40 to rotate relative to the bottom plate 10, so as to realize the need of the rotation driver 90 driving the turntable 40 to rotate automatically. Obviously, in other embodiments, the rotation driver 90 can also be deleted, and the operator can be responsible for the rotation of the turntable 40. For example, as an example, the rotation driver 90 can drive the turntable 40 to rotate through a belt drive, a chain drive or a gear drive. Since the belt drive, the chain drive or the gear drive are already well known in the art, they will not be described here.

[0028] like Figure 1 As shown, the vacuum assembly 70 includes a horizontal cylinder 71 and a suction head 72. The horizontal cylinder 71 is fixed to the bottom plate 10 through a vertical bracket 73, and the bottom plate 10 provides support for the horizontal cylinder 71 through the vertical bracket 73; the output end 711 of the horizontal cylinder 71 extends horizontally toward the direction close to the turntable 40 and is assembled and connected with the suction head 72 to simplify the assembly relationship between the output end 711 of the horizontal cylinder 71 and the suction head 72. The suction head 72 is also offset upward by a preset distance relative to the turntable 40. Figure 2 As shown. It should be noted that this distance is to allow the suction head 72 to extend into or out of the soft-pack lithium battery 200 carried by the carrying station 41 under the drive of the horizontal cylinder 71. It is flexibly designed according to actual needs in the art, so it is not limited to this. In addition, the suction head 72 is driven by the horizontal cylinder 71 to move telescopically, so it can provide an avoidance effect when not working, without affecting the packaging of the soft-pack lithium battery 200 by the upper and lower heat sealing components 60.

[0029] Combined with the accompanying drawings, the working principle of the packaging mechanism of the utility model is explained: the soft-pack lithium battery 200 is placed in the carrying station 41 of the turntable 40, and the soft-pack lithium battery 200 follows the turntable 40 to the position aligned with the infrared heater 80a, and the infrared heater 80a heats the aluminum-plastic film at the pre-secondary sealing position of the soft-pack lithium battery 200, so that the electrolyte infiltrated by the CPP surface of the aluminum-plastic film at the heated position is quickly vaporized. Then, the soft-pack lithium battery 200 treated by the infrared heater 80a follows the turntable 40 to the upper and lower heat-sealing components 60, and the residual liquid and gas electrolyte in the soft-pack lithium battery 200 is concentrated at the edge of the airbag by the vacuum assembly 70; then, the soft-pack lithium battery 200 is secondarily sealed by the upper and lower heat-sealing components 60. Since the infrared heater 80a is heated in the process of waiting for the packaging of the soft-pack lithium battery 200 of the previous group, it does not affect the normal production efficiency.

[0030] Compared with the prior art, with the help of the fixed bracket 80b across the other side of the turntable 40 and the infrared heater 80a installed on the fixed bracket 80b, the fixed bracket 80b allows the infrared heater 80a to be stably suspended above the turntable 40; and because the turntable 40 makes each carrying station 41 pass through the infrared heater 80a and the upper and lower heat-sealing components 60 during the rotation process, the infrared heater 80a can perform infrared heating on the soft-pack lithium battery 200 aligned with the infrared heater 80a when the upper heat-sealing component 50 and the lower heat-sealing component 60 perform heat sealing on the soft-pack lithium battery 200 between the upper and lower heat-sealing components 60, which does not affect the normal production efficiency on the one hand, and makes the electrolyte adsorbed and residual at the packaging position CPP effectively discharged due to the infrared heating, effectively improving the double-sealing packaging effect. In addition, the use of infrared non-contact heating will not damage the surface appearance of the aluminum-plastic film of the soft-pack lithium electronics.

[0031] It is additionally noted that, regarding the specific assembly connection method between the fixed bracket 80b and the base plate 10, reference may be made to the specific assembly method between the first gantry bracket 20 and the base plate 10 described above, so it will not be repeated here.

[0032] The above disclosure is only a preferred example of the present invention, which cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope of the present invention.

Claims

1. A packaging mechanism for improving the poor secondary packaging of soft-pack lithium batteries, comprising a bottom plate, a first gantry bracket located above the bottom plate, a turntable mounted on the bottom plate and rotatable horizontally, an upper heat sealing assembly mounted on the first gantry bracket and located above the turntable, a lower heat sealing assembly mounted on the bottom plate and cooperating with the upper heat sealing assembly, and a vacuum assembly mounted on the bottom plate and located beside the turntable, wherein the first gantry bracket spans one side of the turntable and is assembled and connected to the bottom plate, characterized in that: The packaging mechanism also includes an infrared heater and a fixed bracket spanning the other side opposite to the turntable, the fixed bracket is assembled and connected to the bottom plate, the infrared heater is installed on the fixed bracket and is located above the turntable, the turntable has a plurality of carrying stations separated from each other and aligned along the rotation direction of the turntable and used to carry soft-pack lithium batteries, and the turntable allows each of the carrying stations to pass through the infrared heater and the upper and lower heat-sealing components during rotation.

2. The packaging mechanism according to claim 1, characterized in that: The fixed bracket is in the shape of a "door", and has two vertical frames located on the sides of the turntable and a horizontal frame connected to the vertical frames. The horizontal frame is located above the turntable, and the infrared heater is fixed on the horizontal frame.

3. The packaging mechanism according to claim 1, characterized in that: There are two bearing stations and the central angle between them is 180 degrees.

4. The packaging mechanism according to claim 1, characterized in that: It also includes a rotation driver installed on the base plate, the rotation driver is located below the turntable, and the rotation driver is configured to drive the turntable to rotate relative to the base plate.

5. The packaging mechanism according to claim 4, characterized in that: The rotary driver drives the turntable to rotate via belt drive, chain drive or gear drive.

6. The packaging mechanism according to claim 1, characterized in that: The upper heat sealing assembly includes an upper heat sealing cylinder, an upper and lower lifting seat and an upper heat sealing head. The upper heat sealing cylinder is fixed on the crossbeam of the first gantry bracket. The output end of the upper heat sealing cylinder passes downward through the crossbeam and is assembled and connected to the upper and lower lifting seat. The upper heat sealing head is assembled on the upper and lower lifting seat from below the upper and lower lifting seat.

7. The packaging mechanism according to claim 6, characterized in that: The upper heat-sealing cylinders are two and are separated in a direction in which the first gantry support crosses the turntable.

8. The packaging mechanism according to claim 7, characterized in that: The vacuum pumping assembly includes a horizontal cylinder and a suction head. The horizontal cylinder is fixed to the base plate through a vertical bracket. The output end of the horizontal cylinder extends horizontally toward the turntable and is assembled and connected to the suction head. The suction head is also offset upward by a preset distance relative to the turntable.

9. The packaging mechanism according to claim 6, characterized in that: The lower heat sealing assembly includes a lower heat sealing cylinder and a lower heat sealing head that cooperates with the upper heat sealing head for heat sealing. The lower heat sealing cylinder is fixed to the bottom plate, and the output end of the lower heat sealing cylinder is arranged upward. The lower heat sealing head is assembled and connected to the output end of the lower heat sealing cylinder, and the lower heat sealing head is located below the turntable.

10. The packaging mechanism according to claim 9, characterized in that: The bearing station includes a cavity that passes through the turntable from top to bottom and a plurality of bone strips placed in the cavity and spaced apart from each other by a preset distance. The ends of the bone strips are fixedly connected to the cavity walls of the cavity. The lower heat sealing head is provided with an avoidance groove for avoiding the bone strips. Both the upper heat sealing head and the lower heat sealing head are brass heads.

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