CN218568932U

CN218568932U - Film pasting mechanism for square-shell battery

Info

Publication number: CN218568932U
Application number: CN202222504983.5U
Authority: CN
Inventors: 肖谊发; 李军利; 韩成军; 肖金星; 张国平; 彭涛
Original assignee: Shenzhen Yuchen Intelligent Equipment Co Ltd
Current assignee: Shenzhen Yuchen Intelligent Equipment Co Ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2023-03-03
Anticipated expiration: 2032-09-21

Abstract

The utility model provides a film sticking mechanism for a square-shell battery, which is used for sticking a film on the bottom surface of the square-shell battery with an explosion-proof window on the bottom surface, and comprises a film sticking roller and a film sticking driving module, wherein the film sticking roller is used for pressing an insulating film to the bottom surface of the battery, and the roller surface of the film sticking roller is provided with a cavity corresponding to the size of the explosion-proof window; and the film sticking driving module is used for driving the film sticking roller to move and rotate. The utility model discloses a square shell battery pad pasting mechanism is through setting up the hole on the pad pasting roller, and when the bottom surface of insulating film to battery was pasted to the pad pasting roller under the drive of pad pasting drive module, the hole is corresponding with the position of explosion-proof window lid to can not extrude explosion-proof window lid, not influence the rubber coating process of other positions in bottom surface simultaneously, effectively improved the pad pasting efficiency and the quality of the square shell battery that the bottom surface was equipped with explosion-proof window.

Description

Film sticking mechanism for square-shell battery

Technical Field

The utility model belongs to the technical field of the diolame equipment of square-shell battery, especially, relate to a pad pasting mechanism of insulating film is pasted to bottom surface of square-shell battery that the bottom surface is equipped with explosion-proof window.

Background

In the manufacturing process of the square-shell battery, a wrapping insulating film is required to be attached to the outer part of the bare cell so as to play a role in electrical isolation. In the related prior art, a feeding mechanism, a film feeding mechanism and a film sticking mechanism are adopted for U-shaped film sticking.

The general insulating film is made into a double-layer film type, namely, the back surface of the insulating film is adhered to a release film by adhesive, and then the insulating film is wound on a reel outside and inside the release film to form a double-layer film roll. In this embodiment, the insulating film is a polyethylene terephthalate film (abbreviated as PET film), generally 0.08 to 0.15mm thick, sticky on the back, made into a tape shape and wound on a reel as an insulating film tape roll, and has excellent insulation, high temperature resistance, flame retardancy, heat dissipation and stretching rigidity; the glue is a polymer binder (one or more of polyvinylidene fluoride-hexafluoropropylene copolymer, polyvinylidene fluoride, polymethyl methacrylate, polyethylene oxide, polyacrylonitrile, polystyrene, polyvinyl acetate and polyvinylpyrrolidone), has the thickness of 0.01-0.05 mm, can accelerate consolidation when meeting ultraviolet light (UV) irradiation, and has excellent insulativity, high temperature resistance, flame retardance, heat dissipation and viscosity; the release film is a polyethylene film (PE film for short) and generally has the thickness of 0.05-0.1 mm; the winding drum is a paper drum or a rubber drum and is used for winding the double-layer film and recovering the wound release film.

A battery with an explosion-proof window on the bottom surface, for example, a square aluminum-shell lithium battery with 54mm in thickness, 172mm in width and 97mm in height, has a cover plate, a positive pole, a negative pole and a liquid injection hole arranged on the top, the explosion-proof window is hidden in the center of the bottom surface of the battery, an exposed explosion-proof window cover is a transparent polyethylene (PP) or polypropylene (PP) sheet with 0.15-0.3 mm in thickness and is pressed on the surface of the aluminum shell to protect an explosion-proof valve, and the size of the explosion-proof window cover is 30mm in length, 16mm in width and 1.2mm in height.

Because the large surface of the explosion-proof window cover is stuck by the insulating film, the explosion pressure of the explosion-proof window can be increased, and the safety performance of the battery is reduced, the insulating film at the large surface part of the explosion-proof window cover needs to be removed before or after film sticking to expose the explosion-proof window cover, or the insulating film stuck on the large surface of the explosion-proof window cover needs to be cut off in a closed loop mode (the cut island diaphragm can be continuously stuck on the large surface of the explosion-proof window cover and is not taken away), so that the explosion pressure of the explosion-proof valve cannot be increased by the insulating film. In addition, the explosion-proof window cover is generally slightly higher than the bottom plane, and the explosion-proof window cover is collapsed by the extrusion of the film, so that the film sticking of the battery with the explosion-proof window on the bottom surface is troublesome.

The film sticking quality and the process requirements of the bottom surface explosion-proof window square-shell battery are as follows: the film sticking precision comprises +1mm of film cutting precision of the explosion-proof window part (wherein, the battery positioning precision is +0.5mm, and the film positioning precision is +0.5 mm), the film tension is 1.5 +/-0.5 kgF (controlled by a magnetic powder controller), the film sticking pressure is 15 +/-5 kgF, the explosion-proof window cover is free of damage, scratches and pollution, and the insulating film is free of damage, scratches, wrinkles, bubbles and pollution.

In the related prior art, a cut slightly larger than the explosion-proof window cover is cut on the insulating film band section, and then the explosion-proof window cover on the bottom surface of the battery is aligned with the cut of the explosion-proof window cover of the insulating film band section in a U-shaped film pasting mode.

In the related art, the film uses a smooth film roll to roll the bottom surface of the battery flexibly, and thus is not suitable for the bottom surface of the battery to which the explosion-proof window cover is attached.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a square shell battery pad pasting mechanism for solve among the prior art battery package insulating film that the bottom was equipped with explosion-proof window lid and adopt earlier to cut behind the membrane pad pasting, production efficiency is low, and cut behind the diolame that the membrane precision is low, the technical problem that the quality percent of pass is low.

The utility model relates to a realize like this, a square shell battery pad pasting mechanism for a bottom surface is equipped with the pad pasting of the square shell battery (hereinafter for short the battery) bottom surface of explosion-proof window, this mechanism includes:

the surface of the film sticking roller is provided with a cavity corresponding to the size of the explosion-proof window cover and used for pressing and sticking the insulating film to the bottom surface of the battery;

and the film sticking driving module is used for driving the film sticking roller to move and rotate.

Preferably, pad pasting drive module includes pad pasting mounting panel, pad pasting drive assembly, pad pasting balladeur train, the smooth group of pad pasting and drive assembly, pad pasting drive assembly with the slide rail of the smooth group of pad pasting is fixed in on the pad pasting mounting panel, the pad pasting balladeur train is fixed in the smooth slider of group of pad pasting, pad pasting drive assembly's expansion end with the pad pasting balladeur train links to each other, drive assembly at least part is fixed in on the pad pasting balladeur train, just drive assembly with the pad pasting roller rotates and connects.

Preferably, pad pasting drive assembly includes support, pad pasting driving piece, lead screw and nut, the support is fixed in the pad pasting mounting panel, the pad pasting driving piece is fixed in the support, the lead screw is fixed in the expansion end of pad pasting driving piece, the nut is fixed in the pad pasting balladeur train and with lead screw threaded connection.

Preferably, the transmission assembly comprises a rack, a driving wheel and a driven wheel, the rack is fixed on the film mounting plate, the driving wheel is fixed on the film carriage and meshed with the rack, the driven wheel is meshed with the driving wheel, the film roller is connected with the driven wheel, and the driven wheel is driven by the driving wheel to rotate.

Preferably, the pad pasting roller includes the roll body and wears out the roller of roll body, the cavity is located the roll body surface, the roller wear to locate the pad pasting balladeur train and with follow driving wheel fixed connection.

Preferably, the mechanism further comprises an induction module used for inducing the rotation angle of the film pasting roller, the induction module comprises an induction sheet and an inductor, the induction sheet is fixedly connected with the driven wheel, and the inductor is fixed on the film pasting sliding frame.

Compared with the prior art, the utility model, beneficial effect lies in:

the utility model discloses a square shell battery pad pasting mechanism is through setting up the hole on the pad pasting roller, and when the bottom surface of insulating film to battery was pasted to the pad pasting roller under the drive of pad pasting drive module, the position of hole and explosion-proof window lid is corresponding to can not extrude explosion-proof window lid, do not influence the rubber coating process of other positions in bottom surface simultaneously, effectively improved the insulating pad pasting precision, production efficiency and the quality percent of pass of battery bottom surface.

Drawings

FIG. 1 is a schematic structural diagram of a film sticking mechanism of a square-shell battery;

FIG. 2 is an enlarged partial view of circle A of FIG. 1;

fig. 3 is a film sticking schematic diagram of a film sticking mechanism of a square-shell battery.

Description of the reference numerals:

100. a battery;

10. a film sticking mechanism; 11. a film pasting roller; 111. a roller body; 1111. a cavity; 112. a roller; 12. a film sticking driving module; 121. mounting a film; 122. a film sticking driving component; 1221. a support; 1222. a film pasting driving piece; 1223. a screw rod; 1224. a nut; 123. a film pasting sliding frame; 124. a transmission assembly; 1241. a rack; 1242. a driving wheel; 1243. a driven wheel; 125. a sensing module; 1251. an induction sheet; 1252. an inductor; 126. and (5) pasting a film sliding group.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the mechanism or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; the two components can be directly connected with each other or indirectly connected with each other through an intermediate medium, and the two components can be communicated with each other. To those of ordinary skill in the art, the specific meaning of the terms in the present invention can be understood in a specific context.

Referring to fig. 1-3, the present embodiment provides a film pasting mechanism 10 for a square-casing battery 100 with an explosion-proof window on the bottom surface, which includes a film pasting roller 11 and a film pasting driving module 12. The surface of the film sticking roller 11 is provided with a cavity 1111 corresponding to the size of the explosion-proof window, and the cavity 1111 is used for pressing and sticking the insulating film to the bottom surface of the battery 100; the film sticking driving module 12 is used for driving the film sticking roller 11 to move and rotate.

Compared with the prior art, the square-shell battery film pasting mechanism 10 of the embodiment is characterized in that the cavity 1111 is formed in the film pasting roller 11, when the film pasting roller 11 is driven by the film pasting driving module 12 to paste the insulating film to the bottom surface of the battery 100, the cavity 1111 corresponds to the position of the explosion-proof window cover, so that the explosion-proof window cover cannot be extruded, the encapsulation process of other positions of the bottom surface cannot be influenced, and the film pasting precision, the production efficiency and the quality qualified rate of the insulating film on the bottom surface of the battery 100 are effectively improved.

In this embodiment, the film pasting driving module 12 includes a film pasting mounting plate 121, a film pasting driving assembly 122, a film pasting sliding frame 123, a film pasting sliding group 126 and a transmission assembly 124, wherein the sliding rails of the film pasting driving assembly 122 and the film pasting sliding group 126 are fixed on the film pasting mounting plate 121, the film pasting sliding frame 1231 is fixed on the sliding block of the film pasting sliding group 126, the movable end of the film pasting driving assembly 122 is connected with the film pasting sliding frame 123, at least part of the transmission assembly 124 is fixed on the film pasting sliding frame 1231, and the transmission assembly 124 is rotatably connected with the film pasting roller 11. The film driving component 122 drives the film sliding frame 1231 to slide up and down, the film sliding frame 1231 drives the transmission component 124 to rotate in the sliding process, and the transmission component 124 drives the film pasting roller 11 to rotate, so that the film pasting roller 11 can synchronously move up and down and rotate. The film pasting sliding frame 123 is driven by the film pasting driving assembly 122 to move on the sliding rail integrally with the sliding block, the sliding block in the film pasting sliding group 126 is matched with the sliding rail to balance the moving process of the film pasting sliding frame 123, and the moving direction and the moving stability of the film pasting sliding frame 123 are limited.

In the present embodiment, the film driving assembly 122 includes a support 1221, a film driving unit 1222, a screw 1223, and a nut 1224, the support 1221 is fixed to the film mounting plate 121, the film driving unit 1222 is fixed to the support 1221, the screw 1223 is fixed to the movable end of the film driving unit 1222, and the nut 1224 is fixed to the film carriage 123 and is in threaded connection with the screw 1223. The film-pasting driving piece 1222 is a motor, the motor can drive the screw rod 1223 to rotate, and when the screw rod 1223 rotates, the nut 1224 can move up and down along a thread track on the screw rod 1223, so that the film-pasting sliding frame 123 is driven to move.

Referring to fig. 2, in the present embodiment, the transmission assembly 124 includes a rack 1241, a driving wheel 1242 and a driven wheel 1243, the rack 1241 is fixed on the film mounting plate 121, the driving wheel 1242 is fixed on the film carriage 123 and engaged with the rack 1241, the driven wheel 1243 is engaged with the driving wheel 1242, the film roller 11 is connected to the driven wheel 1243, and the driven wheel 1243 drives the film roller 11 to rotate under the driving of the driving wheel 1242. The driving wheel 1242 fixes the axis on the film-sticking sliding frame 123 through a bearing, the gear at the outer edge can rotate, when the driving wheel 1242 moves upwards under the driving of the film-sticking sliding frame 123, the driving wheel 1242 is meshed with the rack 1241, so that the driving wheel 1242 moves and rotates simultaneously, and the driven wheel 1243 also moves and rotates under the driving of the driving wheel 1242.

In this embodiment, the transmission assembly 124 further includes a sensing module 125 for sensing a rotation angle of the film pasting roller 11, the sensing module 125 includes a sensing piece 1251 and a sensor 1252, the sensing piece 1251 is fixedly connected to the driven wheel 1243, and the sensor 1252 is fixed on the film pasting carriage 123. The sensor 1252 senses the position of the sensing piece 1251 to confirm the rotation position of the driven wheel 1243, thereby confirming whether or not the adhesion of the bottom insulating film of the battery 100 is completed.

In this embodiment, the film pasting roller 11 includes a roller body 111 and a roller shaft 112 penetrating through the roller body 111, the cavity 1111 is disposed on the outer surface of the roller body 111, and the roller shaft 112 penetrates through the film pasting carriage 123 and is fixedly connected to the driven wheel 1243. The roller shaft 112 penetrates through the film sticking sliding frame 123 but is not fixedly connected with the film sticking sliding frame 123, so that the driven wheel 1243 can drive the roller shaft 112 and the roller body 111 to rotate together when rotating, and the film sticking process of rotary rolling is achieved.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A film sticking mechanism for a square-shell battery (hereinafter referred to as a battery) having an explosion-proof window on the bottom surface thereof, comprising:

the surface of the film sticking roller is provided with a cavity corresponding to the size of the explosion-proof window cover and used for pressing the insulating film to the bottom surface of the battery;

2. The film sticking mechanism for the square-shell battery according to claim 1, wherein the film sticking driving module comprises a film sticking mounting plate, a film sticking driving assembly, a film sticking sliding frame, a film sticking sliding group and a transmission assembly, the film sticking driving assembly and a slide rail of the film sticking sliding group are fixed on the film sticking mounting plate, the film sticking sliding frame is fixed on a slide block of the film sticking sliding group, the movable end of the film sticking driving assembly is connected with the film sticking sliding frame, at least part of the transmission assembly is fixed on the film sticking sliding frame, and the transmission assembly is rotatably connected with the film sticking roller.

3. The film sticking mechanism for the square-shell battery according to claim 2, wherein the film sticking driving assembly comprises a support, a film sticking driving piece, a screw rod and a nut, the support is fixed on the film sticking mounting plate, the film sticking driving piece is fixed on the support, the screw rod is fixed at the movable end of the film sticking driving piece, and the nut is fixed on the film sticking carriage and is in threaded connection with the screw rod.

4. The film sticking mechanism for the square-shell battery as recited in claim 2, wherein the transmission assembly comprises a rack, a driving wheel and a driven wheel, the rack is fixed on the film sticking mounting plate, the driving wheel is fixed on the film sticking carriage and meshed with the rack, the driven wheel is meshed with the driving wheel, the film sticking roller is connected with the driven wheel, and the driven wheel drives the film sticking roller to rotate under the driving of the driving wheel.

5. The film sticking mechanism for the square-shell battery as recited in claim 4, wherein the transmission assembly further comprises an induction module for inducing the rotation angle of the film sticking roller, the induction module comprises an induction sheet and an inductor, the induction sheet is fixedly connected with the driven wheel, and the inductor is fixed on the film sticking carriage.

6. The film sticking mechanism for the square-shell battery as recited in claim 4, wherein the film sticking roller comprises a cylindrical roller body and a roller shaft penetrating out of the roller body, the cavity is formed in the outer surface of the roller body, and the roller shaft penetrates through the film sticking sliding frame and is fixedly connected with the driven wheel.