CN113002852B - Film pasting mechanism and device for soft package battery and film pasting method - Google Patents

Abstract

The invention relates to a film sticking mechanism and device for a soft package battery and a film sticking method, wherein the film sticking mechanism for the soft package battery is used for sticking a protective film on the surface of the soft package battery and comprises a battery bearing part and a rolling part, the battery bearing part is provided with a battery accommodating cavity with an open top, and an inflating unit for an external inflating device to inflate an aluminum plastic film shell of the soft package battery is arranged on the battery bearing part. The roll-pressing part comprises a driving unit and a press roll arranged on the driving end of the driving unit, the press roll can be elastically deformed in the radial direction, and can perform preset film pasting motion under the driving of the driving unit so as to attach the protective film to the surface of the aluminum plastic film shell. According to the film sticking mechanism for the soft package battery, the inflation unit is arranged, and the compression roller capable of elastically deforming in the radial direction is adopted, so that the protective film can be effectively stuck to the surface of the aluminum plastic film shell, bubbles can be effectively prevented from being generated, the aluminum plastic film shell can be prevented from deforming, and better sticking quality can be obtained.

Description

Soft-pack battery filming mechanism and device and filming method

technical field

The invention relates to the technical field of soft-pack battery manufacturing equipment, in particular to a soft-pack battery sticking mechanism, and at the same time, the present invention also relates to a soft-pack battery sticking device with the soft-pack battery sticking mechanism, and a soft-pack battery sticking mechanism using the soft-pack battery sticking mechanism film method.

Background technique

Soft-pack batteries are one of the mainstream systems that are parallel to battery structures such as cylinders, aluminum cases, and plastic cases, and are widely used in digital products, as well as in the fields of power and energy storage. Among them, the soft-pack lithium battery is mainly composed of positive and negative electrode materials, diaphragm, electrolyte and aluminum-plastic film wrapped in the outermost layer. Because polymer soft-pack batteries are mostly formed with curved surfaces, the outermost nylon layer of the aluminum-plastic film is easily scratched by the machine during the battery manufacturing process, resulting in problems such as leakage and corrosion by electrolyte. Therefore, usually A protective film is attached to the outermost layer of the aluminum-plastic film of the pouch battery.

At present, the following methods are mainly used to stick the film. One is the method of pressing the protective film against the rollers. This method cannot ensure the parallelism due to the pressing of the rollers, and the rollers are generally made of soft rubber material, which is easy to Foreign matter attached. Another method is to use vacuum adsorption protective film to stick the film. This method has poor positioning effect when adsorbing the protective film, and when pressing, the curved surface of the aluminum-plastic film surface is unevenly stressed, resulting in poor film quality. The third method is to adsorb the protective film on the rollers in advance. When the battery passes through the gap between the rollers, control the speed and follow the battery to gradually complete the filming. This method easily leads to the deformation of the aluminum-plastic film, and it is easy to produce various bubbles. .

SUMMARY OF THE INVENTION

In view of this, the present invention aims to provide a pouch battery film sticking mechanism, which can improve the sticking quality of the protective film on the aluminum-plastic film case.

To achieve the above object, the technical scheme of the present invention is achieved in this way:

A soft-pack battery sticking mechanism for sticking a protective film on the surface of a soft-pack battery, the soft-pack battery sticking mechanism comprising:

The battery carrying part has a battery accommodating cavity with an open top, and an inflatable unit for an external inflator to inflate the aluminum-plastic film shell of the soft pack battery is arranged on the battery carrying part;

The roller pressing part includes a driving unit and a pressing roller arranged on the driving end of the driving unit, the pressing roller can be elastically deformed in the radial direction, and driven by the driving unit, the pressing roller performs a preset to stick the protective film on the surface of the aluminum-plastic film shell.

Further, the battery accommodating cavity and the part of the inflated pouch battery located in the battery accommodating cavity are arranged in conformity with the shape.

Further, the battery accommodating cavity is punched and formed.

Further, the battery carrying portion is provided with an evacuation unit that is connected to an external evacuation device to evacuate the battery accommodating cavity.

Further, the battery carrying part includes a lower seat body and an upper seat body connected with the lower seat body, and the connected upper seat body can form a compression on the edge portion of the aluminum-plastic film casing.

Further, the pressing rollers are arranged side by side, and the pressing rollers include a main body connected to the driving end, and a sponge layer covering the main body, and the main body is made of carbon fiber.

Further, the thickness of the sponge layer is 3-10 mm.

Further, the driving unit includes a longitudinal driving device and a transverse driving device provided on the driving end of the longitudinal driving device, and the pressing roller is provided on the driving end of the transverse driving device.

Further, the pouch battery sticking mechanism further includes an inversion portion for inverting the pouch battery located in the battery accommodating cavity.

Compared with the prior art, the present invention has the following advantages:

The pouch battery film sticking mechanism of the present invention is provided with an inflatable unit on the battery carrying part for inflating the aluminum-plastic film casing by an external inflator, and a radially elastically deformable pressing roller is used, so that the pressing roller can be Under the extrusion, the protective film is effectively attached to the surface of the aluminum-plastic film shell, which can effectively avoid the generation of air bubbles, and can prevent the deformation of the aluminum-plastic film shell, so as to obtain better bonding quality.

In addition, arranging the battery accommodating cavity and the part of the inflated soft pack battery in the battery accommodating cavity to follow the shape can ensure that the aluminum-plastic film shell of the air-filled port does not deform and affect the punching quality. The battery carrying part is provided with an evacuation unit which is connected to an external evacuation device to evacuate the battery accommodating cavity, which can not only effectively prevent the deformation of the aluminum-plastic film shell when the pouch battery is placed in the battery accommodating cavity , and can also improve the fixing effect of the soft pack battery.

In addition, the connected upper seat body is formed to press the edge part of the aluminum-plastic film shell, which can improve the fixing effect of the soft pack battery. By covering the main body with a sponge layer, the radial elastic deformation effect of the pressing roller can be improved, thereby improving the quality of the film. The setting of the inversion part can facilitate the application of the film sticking mechanism to the other side of the aluminum-plastic film shell.

Another object of the present invention is to provide a pouch battery film sticking device, which includes an unwinding mechanism for unwinding the protective film, the pouch battery film sticking mechanism as described above located downstream of the unwinding mechanism, and adjacent to the unwinding mechanism. The pouch battery film sticking mechanism is provided with a cutting mechanism to cut off the protective film.

The pouch battery film sticking device of the present invention, by adopting the pouch battery sticking mechanism as described above, can effectively avoid the generation of air bubbles after sticking the film, and can prevent the deformation of the aluminum plastic film shell, and can obtain better sticking quality. , so it can have better use effect.

In addition, the present invention also relates to a film sticking method for a pouch battery film sticking mechanism, the film sticking method includes: inflating the pouch battery to make the pouch battery stick to the protective film, and then performing a preset film sticking through a pressing roller action, and the protective film is attached to the surface of the aluminum-plastic film casing.

The film sticking method of the present invention has simple operation and can improve the sticking quality of the protective film on the aluminum-plastic film shell.

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 is a schematic structural diagram of a pouch battery film sticking mechanism according to an embodiment of the present invention;

FIG. 2 is an exploded exploded view of the pouch battery film sticking mechanism according to the embodiment of the present invention;

Fig. 3 is the distribution diagram of the air extraction channel on the lower seat body according to the embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a pouch battery film sticking device according to an embodiment of the present invention.

Description of reference numbers:

1. Lower base; 101. Air extraction channel; 2. Upper base; 3. Soft pack battery; 4. Press roller; 5. Protective film; 6. Connection assembly; 7. Unwinding mechanism; 8. Tension control mechanism; 9. Correction mechanism; 10. Cutting mechanism; 11. Film pulling mechanism; 12. Turning part.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inside", and "back" appear to indicate orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. , is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, if terms such as "first" and "second" appear, they are also used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

This embodiment relates to a pouch battery film sticking mechanism, which is used for sticking a protective film on the surface of the pouch battery, and in the overall structure, it mainly includes a battery carrying part and a rolling part. Wherein, the battery carrying part has a battery accommodating cavity with an open top, and an inflating unit for an external inflator to inflate the aluminum-plastic film shell of the soft pack battery is arranged on the battery carrying part. The rolling part includes a driving unit and a pressing roller arranged on the driving end of the driving unit, and the pressing roller can be elastically deformed in the radial direction. The protective film is attached to the surface of the aluminum-plastic film shell.

The pouch battery film sticking mechanism of this embodiment is provided with an inflatable unit on the battery carrying part for inflating the aluminum-plastic film case by an external inflator, and a radially elastically deformable pressing roller is used, so that the Under extrusion, the protective film is effectively attached to the surface of the aluminum-plastic film shell, thereby effectively avoiding the generation of air bubbles, and preventing the deformation of the aluminum-plastic film shell, thereby obtaining better bonding quality.

Based on the above design idea, an exemplary structure of the pouch battery film sticking mechanism in this embodiment is shown in FIGS. 1 and 2 . In order to improve the fixing effect on the pouch battery 3 , the battery carrying part of this embodiment includes a lower The base body 1 and the upper base body 2 detachably connected with the lower base body 1, and the connected upper base body 2 can form a compression on the edge portion of the aluminum-plastic film shell. Wherein, the existing conventional detachable connection method may be adopted between the lower seat body 1 and the upper seat body 2 . In addition, in order to improve the film sticking effect, the side of the upper seat body 2 for pressing the edge of the aluminum-plastic film shell preferably adopts a structure arranged in conformity with the aluminum-plastic film shell.

Still as shown in FIG. 1 , the above-mentioned inflatable unit specifically includes an inflatable channel constructed on the lower seat body 1 , and a connecting component 6 provided at the channel opening of the inflatable channel for connecting with an external inflatable device. Wherein, the charging channel is specifically provided corresponding to the unpackaged side of the pouch battery 3, so that gas can be charged into the aluminum-plastic film casing through the side, and the gas can be oil-free compressed air or nitrogen. It can be understood that, in addition to being formed on the lower seat body 1, the inflation channel can also be configured on the upper seat body 2, or formed by the upper seat body 2 and the lower seat body 1, but the airtightness of the inflation channel needs to be considered at this time. .

In addition, in order to ensure that the aluminum-plastic film casing will not be deformed after inflation and affect the quality of the punching hole, the battery accommodating cavity of this embodiment and the part of the inflated soft pack battery 3 located in the battery accommodating cavity are arranged in conformity with the shape, and the specific can be Adopt punch forming. Among them, in the specific design and implementation, the inflation of the aluminum-plastic film case can be completed first, and then the battery accommodating cavity can be constructed according to the shape of the inflated aluminum-plastic film case. And in order to prevent the aluminum-plastic film shell from cracking during inflation, the inflation pressure can be limited to 0.05MPa to 0.2MPa.

In this embodiment, the battery carrying part is provided with an evacuation unit which is connected to the external evacuation device to evacuate the battery accommodating cavity. This arrangement can not only effectively dispose the pouch battery 3 in the battery accommodating cavity, but also effectively The deformation of the aluminum-plastic film casing can be prevented, and at the same time, the fixing effect of the soft pack battery 3 can be improved, and the film sticking effect can be improved. As shown in FIG. 3 , as a feasible implementation manner, the vacuum evacuation unit of this embodiment specifically includes a plurality of air evacuation channels 101 constructed on the lower base body 1 , and the plurality of air evacuation channels 101 correspond to the batteries. The accommodating chambers are arranged substantially evenly. Obviously, in addition to the distribution structure shown in FIG. 3 , the air extraction channel 101 can also be adjusted according to specific conditions.

The aforementioned driving unit specifically includes a longitudinal driving portion that can output longitudinal displacement, and a transverse driving portion that is provided at the driving end of the longitudinal driving portion and that can output lateral displacement. The above-mentioned pressing roller 4 is specifically provided on the driving end of the transverse driving portion. . Wherein, the longitudinal driving part can specifically adopt a longitudinally arranged linear motor, and the lateral driving part can adopt a laterally arranged linear motor. Of course, the drive unit can also directly use the existing two-axis servo module.

In addition, there are several pressing rollers 4 arranged side by side in this embodiment, and as a feasible implementation manner, as shown in FIGS. 1 and 2 , the pressing rollers 4 are specifically two arranged side by side, and each pressing roller 4 It includes a main body connected to the driving end, and a sponge layer covering the outside of the main body, and the pressing roller 4 can be elastically deformed radially due to the covering of the sponge layer. Wherein, the main body is specifically made of carbon fiber, and the thickness of the sponge layer is 3-10 mm, such as 3 mm, 5 mm, 8 mm, 10 mm, and the like. Here, it can be understood that in addition to being made of carbon fiber, the main body can also be made of other materials with certain hardness.

In addition, in order to further improve the use effect, the pouch battery film sticking mechanism of this embodiment further includes an inversion part 12 for inverting the pouch battery 3 located in the battery accommodating cavity. The inversion part 12 can be a blade-type swing cylinder, and the structure of the clamping part used for clamping the pouch battery 3 can be referred to the inversion mechanism of the existing film sticking device.

In addition, this embodiment also relates to a pouch battery film sticking device, as shown in FIG. 4 , which includes an unwinding mechanism 7 for unwinding the protective film 5 , and the pouch battery as described above located downstream of the unwinding mechanism 7 A film sticking mechanism, and a cutting mechanism 10 arranged adjacent to the pouch battery sticking mechanism to cut off the protective film 5 . And in order to improve the film sticking effect, the unwinding mechanism 7 and the cutting mechanism 10 are also provided with a tension control mechanism 8 and a deviation correction mechanism 9, and a film pulling mechanism 11 is provided downstream of the pressing roller 4. There are technologies, which will not be repeated in this article.

In addition, this embodiment also relates to a film sticking method for a pouch battery sticking mechanism. The film sticking method inflates the pouch battery to make the pouch battery stick to the protective film, and then performs a preset film sticking action through a pressing roller. , and the protective film is attached to the surface of the aluminum-plastic film shell.

Specifically, the surface of the aluminum-plastic film shell of the pouch battery 3 is subjected to pretreatment such as dust removal, defect detection, and static elimination; After the upper base body 2 is pressed against the soft pack battery 3, the inflation starts. At the same time, the pressing roller 4 moves down longitudinally under the driving of the driving unit, so that the protective film 5 is attached to the aluminum-plastic film shell, and the pressure exerted by the driving unit on the pressing roller 4 can be formed by the inflation pressure and the pressure. The closed-loop feedback system is obtained, and its specific reference can be made to the existing design. Then, the driving unit drives the pressing roller 4 to move laterally to complete the film sticking on the upper side of the aluminum-plastic film casing, and then the protective film 5 can be cut by the cutting mechanism 10 . Finally, after the soft pack battery 3 is turned over by the turning part 12, the above steps are repeated to complete the filming on the lower side of the aluminum-plastic film casing.

The film sticking method of the present invention uses the above-mentioned film sticking mechanism to stick the film, which is not only simple to operate, but also can effectively avoid the generation of air bubbles after the film is applied, and can prevent the deformation of the aluminum-plastic film shell, and can obtain better sticking quality, so it can be Has better use effect.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. The utility model provides a laminate polymer battery pad pasting mechanism for at the surface paste protection film (5) of laminate polymer battery (3), its characterized in that, laminate polymer battery pad pasting mechanism includes:

the battery bearing part is provided with a battery accommodating cavity with an opening at the top, and an inflating unit for an external inflating device to inflate the aluminum-plastic film shell of the soft package battery (3) is arranged on the battery bearing part;

the roll extrusion portion comprises a driving unit and a press roller (4) arranged on the driving end of the driving unit, the press roller (4) can be elastically deformed in the radial direction, and under the driving of the driving unit, the press roller (4) executes preset film pasting motion so as to enable the protection film (5) to be pasted on the surface of the aluminum plastic film shell.

2. The film sticking mechanism for the soft package battery according to claim 1, characterized in that: the battery containing cavity and the part of the inflated soft package battery (3) in the battery containing cavity are arranged along with the shape.

3. The film sticking mechanism for the soft package battery according to claim 1, characterized in that: the battery bearing part is provided with a vacuumizing unit which is communicated with an external vacuumizing device to vacuumize the battery accommodating cavity.

4. The film sticking mechanism for the soft package battery according to claim 1, characterized in that: the battery bearing part comprises a lower seat body (1) and an upper seat body (2) connected with the lower seat body (1), and the upper seat body (2) can compress the edge part of the aluminum plastic film shell after connection.

5. The film sticking mechanism for the soft package battery according to claim 1, characterized in that: the pressing roller (4) is a plurality of pressing rollers arranged side by side, the pressing roller (4) comprises a main body connected with the driving end and a sponge layer coated outside the main body, and the main body is made of carbon fibers.

6. The laminate polymer battery pad pasting mechanism of claim 5, characterized in that: the thickness of the sponge layer is 3-10 mm.

7. The film sticking mechanism for the soft package battery according to claim 1, characterized in that: the driving unit comprises a longitudinal driving device and a transverse driving device arranged on the driving end of the longitudinal driving device, and the press roller (4) is arranged on the driving end of the transverse driving device.

8. The film sticking mechanism for the laminate battery according to any one of claims 1 to 7, which is characterized in that: laminate polymer battery pad pasting mechanism still include with being located in the battery holds the chamber laminate polymer battery (3) carry out the upset portion of upset.

9. The utility model provides a laminate polymer battery pad pasting device which characterized in that: the flexible package battery film sticking mechanism comprises an unwinding mechanism for unwinding a protective film (5), the flexible package battery film sticking mechanism located at the downstream of the unwinding mechanism and according to any one of claims 1 to 8, and a cutting mechanism arranged adjacent to the flexible package battery film sticking mechanism and used for cutting off the protective film (5).

10. A film sticking method of a film sticking mechanism of a soft package battery is characterized by comprising the following steps: and inflating the soft package battery to ensure that the soft package battery is attached to the protective film, and executing preset film attaching action through the pressure roller to attach the protective film to the surface of the aluminum-plastic film shell.

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