CN212113908U

CN212113908U - Lamination device for improving lithium ion battery diaphragm fold

Info

Publication number: CN212113908U
Application number: CN202020655547.6U
Authority: CN
Inventors: 黄东; 郭春泰; 何伟
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2020-12-08
Anticipated expiration: 2030-04-26

Abstract

The utility model relates to a lamination device for improving lithium ion battery diaphragm fold, which comprises a machine body, wherein a lamination platform, a positive plate feeding device, a negative plate feeding device, a diaphragm unreeling mechanism, a roller set and a diaphragm feeding mechanism are arranged on the machine body, and the diaphragm feeding mechanism does left and right reciprocating motion to pave a diaphragm on the lamination platform; the positive plate feeding device is used for conveying the positive plates to the lamination table, and the negative plate feeding device is used for conveying the negative plates to the lamination table; the machine body is also provided with a diaphragm cutting device capable of cutting off the diaphragms on the left side and the right side, and the diaphragm cutting device cuts off each layer of diaphragms paved on the lamination table in a thermal cutting mode. The utility model provides an improve lamination device of lithium ion battery diaphragm fold can improve the diaphragm fold problem of lithium ion battery lamination in-process, promotes electric core quality.

Description

Lamination device for improving lithium ion battery diaphragm fold

Technical Field

The utility model relates to a lithium cell manufacture equipment technical field especially relates to an improve lamination device of lithium ion battery diaphragm fold.

Background

The lithium ion soft package battery has the characteristics of good safety performance, light weight, high capacity, high energy density, flexible design and the like. The lithium ion soft package power battery is rapidly popularized in use on new energy automobiles by virtue of the advantages of high energy density and high safety, and the market share of the soft package power battery is continuously increased.

The lithium ion power battery has large capacity, and is produced mostly in a lamination mode in the production process, namely, positive and negative pole pieces are moved to a lamination table after being positioned and corrected, and then are placed on a pressed diaphragm, and then are moved to the other end through the lamination table, the diaphragm is naturally pulled and covered on the pole pieces to enable the diaphragm to move in a Z shape, and the positive and negative pole pieces are respectively placed and move repeatedly, so that the diaphragm is cut off to obtain a required product after a core cladding reaches the required number of layers. When the traditional lamination production process is used, the lamination machine mainly depends on the self weight of the floating roller to control the tension of the diaphragm, the tension of the diaphragm cannot be continuously constant by the control method, and once the control speed of the tension of the diaphragm cannot keep up with the speed of the lamination, the unevenness of the diaphragm which is laminated into the core bag can be caused, the diaphragm folding condition is generated, and the quality of the battery core is influenced.

At present, a long (greater than 400mm) battery core is produced by a company, and because the lithium ion battery of the type is long in length and wide in diaphragm, when the lamination process is produced, the existing equipment cannot effectively control the tension and the flatness of the diaphragm in the lamination process, the diaphragm is very easy to wrinkle in the lamination process, and the diaphragm wrinkle cannot be eliminated in later-stage production, so that the quality of the battery core is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the not enough of prior art, the utility model provides an improve lamination device of lithium ion battery diaphragm fold improves the fold that produces when lamination process production, improves electric core quality. In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a lamination device for improving lithium ion battery diaphragm wrinkles comprises a machine body, wherein a lamination table, a positive plate feeding device, a negative plate feeding device, a diaphragm unwinding mechanism and a roller set are arranged on the machine body; the diaphragm unwinding mechanism and the roller set are arranged at the upper end of the machine body, a wound diaphragm is placed on the diaphragm unwinding mechanism, the wound diaphragm is unwound by the diaphragm unwinding mechanism, and then tension is released by the roller set; the lamination table is fixed at the lower end of the machine body; a diaphragm feeding mechanism is arranged on the machine body between the lamination and the roller set and reciprocates left and right to spread the diaphragm on the lamination table; the positive plate feeding device and the negative plate feeding device are respectively arranged above the lamination table in a left oblique direction and above the lamination table in a right oblique direction, and both move up and down and left and right in a reciprocating manner and can move right above the lamination table; the machine body is also provided with a diaphragm cutting device capable of cutting off the diaphragm on the left side and the right side of the lamination table, and the diaphragm cutting device cuts off each layer of diaphragm paved on the lamination table in a thermal cutting mode.

Furthermore, the diaphragm cutting device comprises a resistance wire, a temperature control system, a slide rail, an upper servo, a lower servo and a left servo, the number of the slide rail, the upper servo, the lower servo and the left servo and the right servo are two, the two left servos and the right servos are respectively arranged on the machine body at the front end and the rear end of the lamination table, an output shaft of each left servo and the right servo is connected with a slide rail which is horizontally arranged, the two slide rails are respectively provided with the upper servo and the lower servo, and the left servo and the right servo control the upper servo and the; a resistance wire is arranged between the two upper and lower servos, the resistance wire is positioned above the lamination table, and the two upper and lower servos jointly control the resistance wire to reciprocate up and down relative to the lamination table; the temperature control system is connected with the resistance wire and controls the temperature of the resistance wire.

Further, a CCD deviation rectifying mechanism is further arranged on the machine body and used for rectifying the deviation of the placement positions of the positive plate and the negative plate on the laminating table.

Further, the CCD deviation rectifying mechanism comprises a CCD deviation rectifying camera and a controller, the CCD deviation rectifying camera is installed right above the lamination table and connected with the controller, and the controller is connected with the positive plate feeding device and the negative plate feeding device respectively.

Furthermore, the front end and the rear end of the lamination table are respectively and movably provided with two U clamps for clamping the diaphragm, the positive plate or the negative plate.

Compared with the prior art, the utility model provides an improve lamination device of lithium ion battery diaphragm fold has following advantage:

1. the diaphragm cutting device capable of cutting off the diaphragm on the left side and the right side of the lamination table is arranged, so that the diaphragm can be cut independently in the lamination process, and various problems caused by continuous diaphragms in diaphragm folding and lamination production, such as diaphragm internal folding, diaphragm internal tension unevenness, staggered layers, poor wrapping and the like, can be solved;

2. the diaphragm cutting device cuts off the diaphragm by adopting a thermal cutting mode, and compared with the traditional cutter cutting, the diaphragm cutting device is higher in cutting efficiency and free from the situation of diaphragm wire drawing.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation.

Fig. 1 is a front view of the overall structure of the present invention;

FIG. 2 is a top view of the lamination station;

the upper, lower, left, right, front and back mentioned in the text are subject to the upper, lower, left, right, front and back pointed out in the drawings;

description of reference numerals: 1-body; 2, a diaphragm unwinding mechanism; 3-a separator; 4-a roller set; 5-a diaphragm feeding mechanism; 6-resistance wire; 7-up and down servo; 8-a slide rail; 9-left and right servo; 10-U clamp; 11-a lamination station; 12-positive plate feeding device; 13-positive plate; 14-negative plate feeding device; 15-negative pole piece.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element 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. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, features defined as "first," "second," "third," etc. may explicitly or implicitly include one or more of the features. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g. as being either fixedly connected or detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.

A lamination device for improving lithium ion battery diaphragm wrinkles is shown in figures 1-2 and comprises a machine body 1, wherein a lamination table 11, a positive plate feeding device 12, a negative plate feeding device 14, a diaphragm unwinding mechanism 2 and a roller set 4 are arranged on the machine body 1; the diaphragm unwinding mechanism 2 and the roller set 4 are arranged at the upper end of the machine body 1, a wound diaphragm 3 is placed on the diaphragm unwinding mechanism 2, the wound diaphragm 3 is unwound by the diaphragm unwinding mechanism 2, and then tension is released by the roller set 4; the lamination table 11 is fixed at the lower end of the machine body 1; a diaphragm feeding mechanism 5 is arranged between the laminating table 11 and the roller set 4 on the machine body 1, the diaphragm feeding mechanism 5 is connected with a first servo, a power source is provided by the first servo to reciprocate left and right, and the diaphragms 3 are laid on the laminating table 11 layer by layer in the left and right reciprocating process; the positive plate feeding device 12 and the negative plate feeding device 14 are respectively arranged above the laminating table 11 in the left oblique direction and above the right oblique direction, the positive plate feeding device 12 and the negative plate feeding device 14 are respectively connected with a second servo and a third servo, and the positive plate feeding device 12 and the negative plate feeding device 14 can reciprocate up and down and left and right and can move right above the laminating table 11 through the matching of a guide rail and the second servo and the third servo; the front end and the rear end of the lamination table 11 are respectively and movably provided with two U-shaped clamps 10, and when the diaphragm 3, the positive plate 13 or the negative plate 15 is laid on the lamination table 11, the U-shaped clamps 10 press the diaphragm 3, the positive plate 13 or the negative plate 15 in the moving sequence of 'out → up → in → down'.

The machine body 1 is also provided with a diaphragm cutting device which can cut off the diaphragm 3 on the left side and the right side of the lamination table 11, and the diaphragm cutting device cuts off each layer of diaphragm paved on the lamination table 11 in a thermal cutting mode; the diaphragm cutting device comprises a resistance wire 6, a temperature control system, slide rails 8, an upper servo 7, a lower servo 7 and a left servo 9 and a right servo 9, the number of the slide rails 8, the upper servo 7, the lower servo 7 and the left servo 9 and the right servo 9 is two, the two left servo 9 and the right servo 9 are respectively arranged on the machine body 1 at the front end and the rear end of the lamination table 11, an output shaft of each left servo 9 and the right servo 9 is connected with one slide rail 8 which is horizontally arranged, each slide rail 8 is provided with the upper servo 7 and the lower servo 7, the slide rails 8 are lead screws, and the left servo 9 and the right servo; a resistance wire 6 is arranged between the two upper and lower servos 7, the resistance wire 6 is positioned above the lamination table 11, and the two upper and lower servos 7 jointly control the resistance wire 6 to reciprocate up and down relative to the lamination table 11; the temperature control system is connected with the resistance wire 6 and controls the temperature of the resistance wire 6.

The machine body 1 is also provided with a CCD (charge coupled device) deviation rectifying mechanism, and the CCD deviation rectifying mechanism is used for rectifying the deviation of the placement positions of the positive plate 13 and the negative plate 15 on the lamination table 11; the CCD deviation rectifying mechanism comprises a CCD deviation rectifying camera and a controller, the CCD deviation rectifying camera is installed right above the lamination table 11 and connected with the controller, and the controller is connected with the positive plate feeding device 12 and the negative plate feeding device 14 respectively.

When the device is used, the diaphragm feeding mechanism 5 moves from right to left, the U clamps 10 on the right side of the lamination table 11 move in the sequence of 'out → up → in → down' to press the right end of the diaphragm 3, the negative plate feeding device 14 sucks one negative plate 15 to move above the lamination table 11 from right to left, then moves downwards to slightly press the diaphragm 3, the two pairs of U clamps 10 are pressed on the negative plate 15 in a 'out → up → in → down' mode, and the negative plate feeding device 14 is lifted and returns to the plate taking position; the resistance wire 6 moves from the right side to the left side of the lamination table 11, the diaphragm feeding mechanism 5 moves from the left side to the right side, the positive plate feeding device 12 sucks a positive plate 13 to move rightwards to be above the lamination table 11, then the positive plate feeding device moves downwards to move to the position of the diaphragm 3 to slightly press downwards, the U clamp 10 movably presses the positive plate 13, the temperature control system instantly heats the resistance wire 6 to cut off the diaphragm 3 on the left side of the lamination table 11, the resistance wire 6 moves upwards and then moves rightwards to the right side of the lamination table 11 to move downwards, the diaphragm feeding mechanism 5 moves rightwards to carry out the next round of laying of the diaphragm 3, the negative plate feeding device 14 repeats the operation to place the negative plate 15 on the lamination table 11, the U clamp 10 presses the diaphragm 3 and the pole piece, the temperature control system heats the resistance wire 6 again to cut off the diaphragm 3 on the right side of the lamination table 11, and; in the process, the CCD deviation rectifying device rectifies the deviation of the positive plate 13 and the negative plate 15, and the product quality is ensured.

The utility model discloses be provided with one set of diaphragm cutting device that can cut off diaphragm 3 on lamination platform 11 left side and right side, realize the independent cutting of lamination process diaphragm 3, form the structure of "one deck diaphragm 3 → one deck negative plate 15 → one deck diaphragm 3 → one deck positive plate 1", can improve various problems that lead to by Z shape diaphragm 3 in 3 folds of diaphragm and the lamination production, for example diaphragm 3 internal folding, diaphragm 3 internal tension is uneven, the wrong layer and wrap up bad circumstances; meanwhile, the diaphragm cutting device cuts the diaphragm 3 in a hot cutting mode, compared with the traditional cutter cutting mode, the cutting efficiency is higher, and the condition of drawing the diaphragm 3 cannot occur.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.

Claims

1. A lamination device for improving lithium ion battery diaphragm wrinkles comprises a machine body (1), wherein a lamination table (11), a positive plate feeding device (12), a negative plate feeding device (14), a diaphragm unwinding mechanism (2) and a roller set (4) are arranged on the machine body (1); the diaphragm unwinding mechanism (2) and the roller set (4) are arranged at the upper end of the machine body (1), a coiled diaphragm (3) is placed on the diaphragm unwinding mechanism (2), the coiled diaphragm (3) is unwound through the diaphragm unwinding mechanism (2), and then tension is released through the roller set (4); the lamination table (11) is fixed at the lower end of the machine body (1); the method is characterized in that: a diaphragm feeding mechanism (5) is arranged between the laminating table (11) and the roller set (4) on the machine body (1), and the diaphragm feeding mechanism (5) reciprocates left and right to spread the diaphragm (3) on the laminating table (11); the positive plate feeding device (12) and the negative plate feeding device (14) are respectively arranged above the left side and the right side of the lamination table (11), and the positive plate feeding device (12) and the negative plate feeding device (14) reciprocate up and down and left and right and move right above the lamination table (11); the machine body (1) is also provided with a diaphragm cutting device for cutting off the diaphragm (3) on the left side and the right side of the lamination table (11), and the diaphragm cutting device cuts off each layer of diaphragm laid on the lamination table (11) in a thermal cutting mode.

2. The lamination device for improving the folding of the lithium ion battery separator membrane according to claim 1, wherein: the diaphragm cutting device comprises a resistance wire (6), a temperature control system, a slide rail (8), an upper servo (7), a lower servo (7) and a left servo (9), the number of the slide rail (8), the upper servo (7), the lower servo (7) and the left servo (9) and the right servo (9) are two, the two left servos and the right servos (9) are respectively arranged on the machine body (1) at the front end and the rear end of the lamination table (11), an output shaft of each left servo (9) and the right servo (9) is connected with the slide rail (8) which is horizontally arranged, each slide rail (8) is provided with the upper servo (7) and the lower servo (7), and the left servo (9) and the; a resistance wire (6) is arranged between the two upper and lower servos (7), the resistance wire (6) is positioned above the lamination table (11), and the two upper and lower servos (7) jointly control the resistance wire (6) to do up-and-down reciprocating motion relative to the lamination table (11); the temperature control system is connected with the resistance wire (6) and controls the temperature of the resistance wire (6).

3. The lamination device for improving the folding of the lithium ion battery separator membrane according to claim 1, wherein: the machine body (1) is further provided with a CCD deviation rectifying mechanism, and the CCD deviation rectifying mechanism is used for rectifying the deviation of the placement positions of the positive plate (13) and the negative plate (15) on the laminating table (11).

4. The lamination device for improving the folding of the lithium ion battery separator membrane according to claim 3, wherein: the CCD deviation rectifying mechanism comprises a CCD deviation rectifying camera and a controller, the CCD deviation rectifying camera is installed right above the lamination table (11) and connected with the controller, and the controller is connected with the positive plate feeding device (12) and the negative plate feeding device (14) respectively.

5. The lamination device for improving the folding of the lithium ion battery separator membrane according to claim 1, wherein: the front end and the rear end of the lamination table (11) are respectively and movably provided with two U-shaped clamps (10) for clamping the diaphragm (3), the positive plate (13) or the negative plate (15).