CN209822813U

CN209822813U - Be applied to mechanism of control diaphragm thickness of winder

Info

Publication number: CN209822813U
Application number: CN201920639180.6U
Authority: CN
Inventors: 彭云龙; 张耀; 陈辉; 李国龙; 赵倩; 邓纯
Original assignee: Sunwoda Huizhou Power New Energy Co Ltd
Current assignee: Sunwoda Huizhou Power New Energy Co Ltd
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2019-12-20
Anticipated expiration: 2029-05-07

Abstract

The utility model discloses a mechanism for controlling the thickness of a diaphragm, which comprises a bottom plate, a diaphragm unreeling mechanism arranged on the bottom plate, a guide roller mechanism, a deviation rectifying mechanism for controlling the running precision of the diaphragm, a motor and a control mechanism, wherein the diaphragm unreeling mechanism and the deviation rectifying mechanism are electrically connected with the control mechanism, the guide roller mechanism comprises at least one active guide roller, at least one guide pressure roller and a plurality of transmission guide rollers, the guide pressure roller is matched with any guide roller and arranged on the bottom plate, the distance between the guide pressure roller and the guide roller which is matched with the guide pressure roller is less than or equal to 50 mu m, and a pair of hairbrushes and suction nozzles are respectively arranged around the guide pressure roller for cleaning and adsorbing scraps or adhesive layers remained on the surface of the guide roller or the guide pressure roller, the guide roller and the guide pressure roller are matched for use, so that the thickness of the diaphragm can be controlled to be consistent, thereby reducing the probability, the yield of the production process of the battery core is improved, the process capacity of the process is improved, and the production cost is reduced.

Description

Be applied to mechanism of control diaphragm thickness of winder

Technical Field

The invention relates to a diaphragm winding device of an automatic winding machine, in particular to a mechanism for controlling the thickness of a diaphragm, which is applied to the winding machine.

Background

Lithium ion batteries have the advantages of high energy, small size, long storage life, no pollution and the like, and are widely applied to the fields of power batteries and portable electronic equipment batteries. In the production process of the lithium ion battery, the cell winding of the lithium ion battery is one of the most critical links, the cell winding is formed by stacking a plurality of layers of positive and negative electrodes and two layers of diaphragms at intervals and cutting off and adhering a stop adhesive tape. The diaphragm winding equipment for finishing the production link is key equipment for determining the quality of the lithium battery, and comprises an unwinding mechanism for conveying a diaphragm, a transmission mechanism for driving the unwinding mechanism to rotate, a winding mechanism for winding the diaphragm, a buffer mechanism which is linked with the diaphragm winding mechanism to keep the buffer length of the diaphragm, a tensioning mechanism for providing the tension for discharging the diaphragm, a deviation rectifying mechanism for controlling the travelling precision of the diaphragm and a belt splicing mechanism for connecting the diaphragm. Generally, a membrane is a PE or PPT porous membrane coated with a dense and uniform viscous coating and a ceramic coating, the PE or PPT porous membrane is likely to have a risk of closed pores when the pressure is high, the viscous coating is usually composed of viscous substances with sparse island-shaped structures, and can be softened and thinned under certain pressure when being heated, generally, the viscous coating is processed in the modes of spot coating, spraying, gravure coating and the like, the thickness consistency is difficult to control, the winding thickness is not controlled under the technical condition of the existing winding equipment, the condition of uneven thickness is likely to occur in the winding process, so that electrode lugs are dislocated or even Overhang dislocated, and the battery cannot be welded or even has a safety risk.

Disclosure of Invention

In order to solve the technical problems, the invention provides a mechanism for controlling the thickness of a diaphragm, which is applied to a winding machine, and is characterized in that a pressure guide roller is added on any guide roller in an unwinding mechanism to control the consistency of the thickness of the diaphragm, so that the probability of electrode lug dislocation or Overhang dislocation in the winding process is reduced, the production process yield of a battery cell is improved, the process capability of a process is improved, and the production cost is reduced.

The invention discloses a mechanism for controlling the thickness of a diaphragm, which is applied to a winding machine, and comprises a bottom plate, a diaphragm unwinding mechanism, a guide roller mechanism for conveying the diaphragm, a deviation correcting mechanism for controlling the travelling precision of the diaphragm, a motor and a control mechanism, wherein the diaphragm unwinding mechanism is arranged on the bottom plate; the control mechanism is electrically connected with the diaphragm unwinding mechanism and the deviation rectifying mechanism and controls the diaphragm unwinding mechanism and the deviation rectifying mechanism;

furthermore, the diaphragm unwinding mechanism comprises an expansion shaft for mounting the diaphragm coil stock, an expansion cylinder for controlling the tightness of the expansion shaft, and a push rod linked with the expansion cylinder, wherein the push rod drives a central pull rod arranged in the expansion shaft; the control structure controls the expansion cylinder, the pressure intensity in the expansion cylinder is increased to push the push rod, the push rod drives the central pull rod arranged in the expansion shaft to enable the diaphragm unreeling expansion shaft to operate, and the diaphragm is conveyed to the reeling mechanism through the guide roller mechanism to be reeled;

furthermore, the deviation rectifying mechanism comprises a position sensor, when the diaphragm moves and deviates, the position sensor sends an instruction to the control mechanism, and the control mechanism sends a deviation rectifying instruction, so that the deviation generated by the diaphragm moving is avoided;

furthermore, the guide roller mechanism comprises at least one driving guide roller, at least one guide pressing roller and a plurality of transmission guide rollers, the driving guide roller is electrically connected with the motor, and the motor provides power for the driving guide roller;

as a further improvement of the utility model, the pressure guide roller is matched with any guide roller and is arranged on the bottom plate, the distance between the pressure guide roller and the guide roller matched with the pressure guide roller is less than or equal to 50 μm, and the guide roller and the pressure guide roller apply pressure to the two sides of the diaphragm in the winding process so as to control the thickness of the diaphragm and further ensure the consistency of the thickness of the diaphragm;

as a further improvement of the utility model, a pair of brushes and suction nozzles are respectively arranged around the guide roller and the pressure guide roller and used for cleaning and adsorbing the scraps or adhesive layers remained on the surface of the guide roller or the pressure guide roller;

as a further improvement of the utility model, the brush and the suction nozzle are also connected with the motor, and the motor is controlled to provide power for the brush and the suction nozzle so as to remove and adsorb chippings or residual glue;

further, the guide roller is made of chromium oxide or ceramic materials.

Advantageous effects

According to the invention, the guide pressure roller is additionally arranged on any guide roller in the unreeling mechanism, the distance between the guide roller and the guide pressure roller is controlled to be less than or equal to 50 microns, when the diaphragm with the viscous coating passes through the guide roller and the guide pressure roller, the thickness of the diaphragm is consistent due to the pressure of two sides, in addition, the hairbrush and the suction nozzle are additionally arranged, the residues adsorbed on the guide roller and the guide pressure roller can be further removed, the consistency of the thickness of the diaphragm is ensured, the probability of electrode lug dislocation or Overhang dislocation in the reeling process is further reduced, the production yield of the production process of the electric core is improved, the process capability of the process is improved, and the production cost is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention

FIG. 2 is an enlarged view of portion A of FIG. 1

The meaning of each label in the figure is: 1. the device comprises a bottom plate 2, an unreeling mechanism 3, a guide roller mechanism 4, a control mechanism 5, a brush 6, a suction nozzle 21, an expansion shaft 22, a central pull rod 31, a driving roller 32, a guide pressing roller 33, a driving roller 7, a diaphragm material roll 8 and a diaphragm.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention, but are not intended to limit the scope of the invention, i.e., the invention is not limited to the described embodiments.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", and the like are used for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

In the description of the present invention, it should be further noted that, unless explicitly stated or limited in the art, the terms "mounted," "connected," and "connected" are to be construed broadly and include, for example, fixed connections, detachable connections, or integral connections, either direct connections or indirect connections through intervening media. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.

For a better understanding of the present invention, the following describes embodiments of the present invention in detail with reference to fig. 1 to 2.

As shown in fig. 1, the mechanism for controlling the thickness of the diaphragm applied to the winding machine includes a base plate 1, a diaphragm unwinding mechanism 2 installed on the base plate 1, a guide roller mechanism 3 for conveying the diaphragm, a deviation rectifying mechanism (not shown in the figure) for controlling the running precision of the diaphragm, a motor and a control mechanism 4; the control mechanism 4 is electrically connected with the diaphragm unwinding mechanism 2 and the deviation correcting mechanism 4 and controls the diaphragm unwinding mechanism 2 and the deviation correcting mechanism 4;

further, the membrane unwinding mechanism 2 comprises an expansion shaft 21 for mounting the membrane material roll 7, an expansion cylinder for controlling the tightness of the expansion shaft, a push rod linked with the expansion cylinder, and a central pull rod 22 driven by the push rod and arranged in the expansion shaft; the control structure 4 controls the expansion cylinder, the pressure intensity in the expansion cylinder is increased to push the push rod, the push rod drives the central pull rod 22 arranged in the expansion shaft, so that the diaphragm unreeling expansion shaft 21 is driven to operate, and the diaphragm unreeling expansion shaft is conveyed to the reeling mechanism through the guide roller mechanism 3 to be reeled;

further, the deviation rectifying mechanism comprises a position sensor, when the diaphragm moves and deviates, the position sensor sends a command to be transmitted to the control mechanism 4, and the control mechanism 4 sends a deviation rectifying command, so that the deviation generated by the movement of the diaphragm 8 is avoided;

further, the guide roller mechanism 3 includes at least one active guide roller 31, at least one guide roller 32 and a plurality of driving rollers 33, the active guide roller 31 is connected to the motor (not shown in the figure), the motor provides power for the active guide roller, and the process of the guide roller mechanism 3 transmitting the membrane 8 is: the motor controls the driving guide roller 31 to rotate the transmission diaphragm 8, which is sequentially transmitted to each transmission roller 33, so as to be transmitted to the winding mechanism for winding, wherein the transmission direction is as shown in figure 1,

in the embodiment, the separator comprises a driving guide roller 31, as shown in fig. 1, the guide and press roller 32 is installed on the bottom plate in cooperation with the driving guide roller 31, the distance between the guide and press roller 32 and the guide and press roller 31 is less than or equal to 30 μm, and the guide and press roller 31 and the guide and press roller 32 apply pressure to both sides of the separator 8 during the winding process to control the thickness of the separator 8 to be a certain value, so that the thickness of the separator 8 is kept consistent, the thickness consistency of the separator 8 is improved, and the winding unevenness caused during the winding process is reduced;

as a further improvement of the present invention, a pair of brushes 5 and suction nozzles 6 are respectively arranged around the driving guide roller 31 and the pressure guide roller 32 for cleaning and adsorbing the scraps or residual glue remaining on the surfaces of the driving guide roller 31 and the pressure guide roller 32, thereby further ensuring the quality of the diaphragm;

as a further improvement of the present invention, the brush 5 and the suction nozzle 6 are also connected to the motor, and the motor is controlled to provide power for the brush 5 and the suction nozzle 6 to remove and adsorb the debris or the residual glue;

preferably, the material of the guide roller mechanism 3 is chromium oxide or a ceramic material, and in this embodiment, ceramic is used as the material of the guide roller mechanism 3.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To those skilled in the art to which the invention pertains, a number of simple deductions or substitutions can be made without departing from the scope of the invention, which should be considered as belonging to the scope of the present invention as defined by the appended claims.

Claims

1. The utility model provides a be applied to mechanism of control diaphragm thickness of winder, includes the bottom plate, install diaphragm unwinding mechanism, the deflector roll mechanism of conveying diaphragm, the mechanism, motor and the control mechanism of rectifying of control diaphragm walking precision on the bottom plate, diaphragm unwinding mechanism rectify the mechanism with the control mechanism electricity is connected, its characterized in that, deflector roll mechanism includes at least one initiative deflector roll, at least one leads compression roller and a plurality of transmission deflector roll.

2. The device as claimed in claim 1, wherein the guide roller is mounted on the bottom plate in cooperation with any guide roller, and the distance between the guide roller and the guide roller is not more than 50 μm.

3. The device as claimed in claim 1, wherein a pair of brushes and suction nozzles are disposed around the guide roller and the pressure roller for cleaning and sucking the debris or adhesive layer remained on the surface of the guide roller or the pressure roller.

4. The mechanism for controlling the thickness of a diaphragm applied to a winding machine as claimed in claim 2 or 3, wherein the active guide roller, the brush and the suction nozzle are electrically connected to the motor respectively, and the motor powers the active guide roller, the brush and the suction nozzle.

5. The mechanism for controlling the thickness of the diaphragm applied to the winding machine as claimed in claim 1, wherein the material of the guide roller mechanism is chromium oxide or ceramic.