CN219191367U

CN219191367U - Polar ear calendering device

Info

Publication number: CN219191367U
Application number: CN202222373522.9U
Authority: CN
Inventors: 张卫龙; 李忠华; 李进华; 周中心
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2023-06-16
Anticipated expiration: 2032-09-07

Abstract

The utility model relates to a pole ear calendaring device, which comprises a bracket and further comprises a pole ear calendaring device arranged on the bracket: the roller passing mechanism is used for supporting the pole piece; the tension adjusting mechanism is used for controlling the tension of the pole piece; and the extending mechanism is used for extending the pole piece. The extension mechanism comprises: the at least two extending wheel assemblies are used for extending the pole pieces; at least two adjustment assemblies (35) for adjusting the spreader wheel assembly; and the driving assembly is used for being matched with the extension wheel assembly. The driving assembly comprises a driving roller (31) for driving the extension wheel (34), and further comprises a driving motor (32) for driving the driving roller (31). And a bearing roller (4) for preventing the driving roller (31) from deforming is arranged above the driving roller (31), and the bearing roller (4) is abutted against the driving roller (31). Compared with the prior art, the utility model has the advantages of extending the tab, obviously improving the pole piece wrinkling problem, reducing the breakage rate and the like.

Description

Polar ear calendering device

Technical Field

The utility model relates to the field of lithium ion battery component processing, in particular to a pole ear calendaring device.

Background

In the production of lithium ion batteries, the rolling process is a very critical process, and rolling is a critical point in the battery manufacturing process, and the process performance depends on the electrode characteristics output from the previous manufacturing steps (pulping, coating, drying), which further affect the final electrochemical performance of the subsequent steps and the battery cells. The rolling process involves irreversible mechanical deformation that compacts the particle coating, increases electronically conductive network connectivity, enhances the mechanical stability of the electrode, and increases the volumetric energy and power density of the cell. Rolling can also improve the uniformity of the particle-pore structure in the electrode, thereby reducing the standard deviation of cell performance and improving uniformity.

In the existing production process, the problems which are frequently encountered and are difficult to solve are pole piece wrinkling and belt breakage, and the main reasons are that the pole lug wavy edges, pole lug wrinkling, coating area wrinkling and the like are adopted. Pole piece wrinkling has the following drawbacks: 1. the surface of the bare cell is uneven due to wrinkling of the coating area of the pole piece, and the diaphragm can be damaged at the stress concentration position to cause micro short circuit or short circuit of the cell. 2. The welding strength of the tab is affected by wrinkling of the tab, so that poor welding is caused or the resistance of the battery is increased, the battery heats quickly in the charging and discharging processes, and the cycle life decay is accelerated. The tab wrinkling may also cause the diaphragm to puncture, causing a short circuit. 3. The edges of the pole pieces are wrinkled, living matters are easier to fall off, and the exposed foil is a serious quality problem for the pole pieces. Therefore, the pole piece wrinkling must be well controlled.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide the tab calendaring device for stretching the tab, which can obviously improve the pole piece wrinkling problem and reduce the breakage rate.

The aim of the utility model can be achieved by the following technical scheme:

according to the utility model, the lug is rolled through a mechanism, so that the internal stress of the lug area is released to be extended, and then the coating area is rolled, the utility model is illustrated by two groups of extension wheels, but is not limited to two groups, and can be matched according to actual requirements, and the specific scheme is as follows:

the utility model provides a utmost point ear calendering device, this device includes the support, still includes the setting on the support:

the roller passing mechanism is used for supporting the pole piece; the roller passing mechanism is used for matching the normal operation of the whole equipment, so that the roller passing mechanism is used for installing rollers at a required position;

the tension adjusting mechanism is used for controlling the tension of the pole piece;

and the extending mechanism is used for extending the pole piece.

Further, the roller passing mechanism comprises at least two rollers which are arranged in parallel.

Further, the tension adjusting mechanism comprises a tension adjusting swing roller assembly and a glue pressing roller for performing tension partition on the polar plate.

Further, the tension adjusting swing roller assembly comprises a swing roller capable of swinging and a cylinder for controlling the swing roller to swing.

Further, the tension adjusting swing roller assembly can further comprise a tension controller and/or a tension sensor.

Further, the extension mechanism includes:

the at least two extending wheel assemblies are used for extending the pole pieces;

at least two adjusting components for adjusting the extension wheel components;

and the driving assembly is used for being matched with the extension wheel assembly.

Further, the extension wheel assembly comprises a mounting plate and an extension wheel which are matched with each other, and further comprises a lifting hydraulic cylinder for controlling extension pressure.

Further, the adjusting assembly comprises a screw rod and/or a handle for adjusting the extension wheel.

Further, the driving assembly comprises a driving roller for driving the extension wheel and a driving motor for driving the driving roller. The drive roller and the spreader wheel may be considered in abutting relationship.

Further, a bearing roller which is used for preventing the driving roller from deformation to cause pole piece extension failure or belt breakage is arranged above the driving roller, and the bearing roller is abutted with the driving roller.

Compared with the prior art, the utility model has the following advantages:

(1) The roller passing device can be matched with the normal operation of the whole equipment and can also be used for supporting the pole piece; the tension adjusting component can control the tension of the pole piece and separate the tension of the pole piece;

(2) The driving component and the extending wheel component are matched to extend the polar plate, the pressure can be controlled by lifting of the hydraulic cylinder during the extending process, and the pressure is recommended to be 5-7 tons after verification for a plurality of times;

(3) The bearing roller can prevent the pole piece from extending to be invalid or breaking the belt caused by deformation of the driving roller; the lug is extended by adopting the mechanism, so that the pole piece wrinkling problem is obviously improved, and the breakage rate is reduced.

Drawings

FIG. 1 is a schematic view of a tab rolling device in an embodiment;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

the reference numerals in the figures indicate: the device comprises a passing roller 1, a swinging roller 21, a glue pressing roller 22, an air cylinder 23, a driving roller 31, a driving motor 32, a mounting plate 33, an extension wheel 34, an adjusting assembly 35 and a bearing roller 4.

Detailed Description

The utility model will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present utility model, and a detailed implementation manner and a specific operation process are provided, but the protection scope of the present utility model is not limited to the following embodiments.

Examples

A tab calendaring apparatus as in fig. 1-2, the apparatus comprising a support and further comprising a support disposed thereon: the roller passing mechanism is used for supporting the pole piece; the roller passing mechanism is used for matching the normal operation of the whole equipment, so that the roller passing mechanism is used for installing rollers at a required position; the tension adjusting mechanism is used for controlling the tension of the pole piece; and the extending mechanism is used for extending the pole piece.

The roller passing mechanism comprises two roller passing devices 1 which are arranged in parallel, and the following requirements are met:

the tension adjusting mechanism comprises a tension adjusting swing roller assembly and a glue pressing roller 22 for separating the tension of the polar plate. The tension adjusting swing roller assembly comprises a swinging swing roller 21 and a cylinder 23 for controlling the swinging of the swing roller 21. The dancer swing assembly may also include a tension controller and/or a tension sensor.

The extension mechanism includes: the two extending wheel assemblies are used for extending the pole pieces; two adjustment assemblies 35 for adjusting the spreader wheel assembly; and the driving assembly is used for being matched with the extension wheel assembly. The spreader wheel assembly includes a mating mounting plate 33 and spreader wheels 34, and also includes a liftable hydraulic cylinder for controlling the spreading pressure. The adjustment assembly 35 includes a screw and/or handle for adjusting the spreader wheel 34. The drive assembly includes a drive roller 31 for driving the spreader wheel 34, and a drive motor 32 for driving the drive roller 31. The drive roller 31 and the spreader wheel 34 may be considered in abutting relationship.

A load-bearing roller 4 for preventing the deformation of the driving roller 31 from causing the pole piece extension failure or belt breakage is arranged above the driving roller 31, and the load-bearing roller 4 is abutted against the driving roller 31.

Working principle: the pole piece is conveyed to the position between the driving roller 31 and the extension wheel 34 through the passing roller 1 and the tension swing roller 21, the pressure is regulated according to actual requirements, the pressure proposal is 5-7 tons, and after the pole lug of the pole piece extends, the pole piece is conveyed into the rolling mechanism and then rolled in the pole piece coating area.

The above description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. The utility model provides a utmost point ear calendering device, this device includes the support, its characterized in that, this device still includes to set up on the support:

the roller passing mechanism is used for supporting the pole piece;

the extending mechanism is used for extending the pole piece;

the roller passing mechanism comprises at least two rollers (1) which are arranged in parallel;

the tension adjusting mechanism comprises a tension adjusting swing roller assembly and a glue pressing roller (22) for separating the tension of the polar plate;

the extension mechanism comprises:

at least two adjustment assemblies (35) for adjusting the spreader wheel assembly;

2. The tab calendaring device according to claim 1, wherein the tension adjusting pendulum roller assembly comprises a swingable pendulum roller (21) and a cylinder (23) controlling the swing of the pendulum roller (21).

3. The tab calendaring device of claim 2, wherein the tension adjusting pendulum roller assembly further comprises a tension controller and/or a tension sensor.

4. A tab calendaring apparatus according to claim 1, characterized in that the spreader wheel assembly comprises a mounting plate (33) and spreader wheel (34) that are matched to each other, and further comprises a liftable hydraulic cylinder for controlling the spreading pressure.

5. A tab calendaring device according to claim 4, characterized in that the adjustment assembly (35) comprises a screw and/or handle for adjusting the spreader wheel (34).

6. A tab calendaring apparatus according to claim 4, characterized in that the drive assembly comprises a drive roller (31) for driving the spreader wheel (34) and a drive motor (32) for driving the drive roller (31).

7. The tab rolling device according to claim 6, wherein a bearing roller (4) for preventing deformation of the driving roller (31) is provided above the driving roller (31), and the bearing roller (4) is abutted against the driving roller (31).