CN215896493U

CN215896493U - Blade lithium cell lamination device

Info

Publication number: CN215896493U
Application number: CN202122336976.4U
Authority: CN
Inventors: 王洋
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-02-22
Anticipated expiration: 2031-09-26

Abstract

The utility model belongs to the technical field of lithium battery production and manufacturing, and discloses a blade lithium battery lamination device. This blade lithium cell lamination device includes: the membrane unwinding mechanism is used for discharging the membrane material belt; the membrane traction mechanism is configured to convey the membrane material belt to the conveying platform; the cutting mechanism is arranged above the conveying platform and is configured to cut the diaphragm material belt into single diaphragms; the diaphragm positioning mechanism is used for bearing the single diaphragm and positioning the single diaphragm; the stacking platform is used for bearing a plurality of monomer diaphragms which are sequentially stacked and fixedly arranged relative to the diaphragm positioning mechanism, a negative plate or a positive plate is arranged between every two adjacent monomer diaphragms, and a positive plate is arranged between every two adjacent negative plates. This blade lithium cell lamination device adopts diaphragm sola separation mode, avoids pressing the claw to cause the diaphragm tension uneven, reduces the emergence of fold to improve the life and the reliability of lithium cell.

Description

Blade lithium cell lamination device

Technical Field

The utility model relates to the technical field of lithium battery production and manufacturing, in particular to a blade lithium battery lamination device.

Background

Because the traditional energy is used as a power source of the traditional automobile, the traditional energy can cause serious environmental pollution, and as people pay more and more attention to environmental protection and resource utilization, new energy automobiles are actively developed to realize electrification of the automobile industry, so that the traditional automobile is a main development direction for realizing the automobile industry in China.

The key of the development of the existing electric automobile is a lithium ion battery pack serving as a power core. Compared with the traditional lithium ion battery pack, the volume utilization rate of the blade battery is improved by more than 50%, namely the endurance mileage can be improved by more than 50%, and the equivalent level of the high-energy-density ternary lithium battery is achieved. In the existing blade battery lamination process, as shown in fig. 1, after a negative plate 100 ' is placed on a positioning platform to complete positioning, a manipulator is used to grab the negative plate 100 ' and place the negative plate 100 ' on the lamination platform, after each negative plate 100 ' is laminated, pressing knives located at two sides of the lamination platform are used to press the negative plate 100 ' and a diaphragm 300 ', then the lamination platform moves horizontally to the other side to perform lamination of a positive plate 200 ', the pressing knives located at two sides of the lamination platform are used to press the positive plate 200 ' and the diaphragm 300 ', and after repeated reciprocating actions, the lamination of a battery cell is completed.

In the existing Z-shaped lamination mode, the diaphragm 300 'keeps a single-roll continuous unreeling state and is suitable for pole pieces with the length of more than 300mm, but for wider pole pieces with the length of more than 500mm, the stress of the middle diaphragm 300' is uneven easily due to the fact that the distance between pressing knives on two sides of a lamination platform is too far, and texture wrinkles are generated. If the membrane 300 'in the electric core has wrinkles, the lithium ion is accumulated at the dead angle of the wrinkles of the membrane 300' in the process of charging and discharging the battery easily, the cycle life is shortened, the safety risk is higher, and the reliability of the lithium battery is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a blade lithium battery lamination device which can reduce diaphragm wrinkles and improve the reliability of a lithium battery.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a blade lithium battery lamination apparatus, comprising:

the membrane unwinding mechanism is used for discharging the membrane material belt;

a membrane pulling mechanism and a delivery platform, the membrane pulling mechanism configured to deliver the strip of membrane material to the delivery platform;

the cutting mechanism is arranged above the conveying platform and is configured to cut the membrane material belt into single membranes;

the diaphragm positioning mechanism is used for bearing the single diaphragm and positioning the single diaphragm;

the stacking platform is used for bearing a plurality of monomer diaphragms which are sequentially stacked and fixedly arranged relative to the diaphragm positioning mechanism, two adjacent monomer diaphragms are provided with negative plates or positive plates, and two adjacent negative plates are provided with one positive plate.

Preferably, the diaphragm material belt winding device further comprises a guide roller, wherein the guide roller is located between the diaphragm unwinding mechanism and the diaphragm traction mechanism, and is wound on the periphery of the guide roller and used for guiding the diaphragm material belt.

Preferably, the membrane material belt flattening device further comprises rolling rollers, wherein the rolling rollers are arranged on the conveying platform in a rolling mode and used for flattening the membrane material belt.

Preferably, the diaphragm traction mechanism includes a rotation driving source, a driving roller and a driven roller, an output end of the rotation driving source is connected to the driving roller, the rotation driving source can drive the driving roller to rotate, the diaphragm material belt is arranged between the driving roller and the driven roller, and two sides of the diaphragm material belt abut against the driving roller and the driven roller respectively.

Preferably, the diaphragm unwinding mechanism comprises an unwinding driving source and an unwinding roller, wherein an output end of the unwinding driving source is connected to the unwinding roller, the unwinding roller is provided with the diaphragm material belt in a winding mode, and the unwinding driving source can drive the unwinding roller to rotate.

Preferably, conveying platform is including carrying driving source, action wheel, following driving wheel and conveyer belt, the output of carrying the driving source connect in the action wheel, carry the driving source can drive the action wheel rotates the action wheel with around being equipped with respectively on the follow driving wheel the conveyer belt, the conveyer belt is used for bearing the diaphragm material area or the monomer diaphragm.

Preferably, the diaphragm positioning mechanism includes:

the positioning platform is used for bearing the monomer diaphragm;

the adjusting block is arranged on the positioning platform in a sliding mode, can abut against the side edge of the single diaphragm and is used for adjusting the position of the single diaphragm relative to the positioning platform.

Preferably, the cutting mechanism comprises a mobile driving source and a cutting knife, wherein the output end of the mobile driving source is connected to the cutting knife, and the mobile driving source can drive the cutting knife to move towards the conveying platform for cutting the membrane material belt.

Preferably, the cutting blade includes a connecting portion having one end connected to an output end of the moving drive source and the other end connected to the tip portion.

Preferably, the stacking platform further comprises a grabbing mechanism, wherein the grabbing mechanism can grab the single diaphragm, the positive plate and the negative plate and respectively convey the single diaphragm, the positive plate and the negative plate to the stacking platform.

The utility model has the beneficial effects that:

according to the blade lithium battery lamination device provided by the utility model, when blade lithium batteries are laminated, the diaphragm unwinding mechanism actively discharges the diaphragm material belt, the diaphragm material belt passes through the diaphragm traction mechanism, the diaphragm traction mechanism conveys the diaphragm material belt to the conveying platform, the cutting mechanism cuts the diaphragm material belt into single diaphragms according to the required size, the single diaphragms which are cut are positioned by the diaphragm positioning mechanism, and then the single diaphragms, the positive plates and the negative plates are stacked on the stacking platform. In the whole stacking process, the stacking platform is fixedly arranged relative to the diaphragm positioning mechanism, repeated pulling of the single diaphragms or the diaphragm material belts is avoided, the cutting mechanism separates the diaphragm material belts into the single diaphragms one by one, a diaphragm single-sheet separation mode is adopted in the lamination process, the fact that tension of the diaphragms is uneven due to the pressing claw is avoided, tension at the edges of the single diaphragms can be released, wrinkles are reduced, and therefore the service life and the reliability of the lithium battery are improved.

Drawings

FIG. 1 is a schematic structural view of a prior art blade lithium battery lamination apparatus;

FIG. 2 is a schematic structural diagram of a negative electrode plate required by the lithium battery blade lamination device of the utility model;

FIG. 3 is a schematic structural diagram of a positive plate required by the lithium battery blade lamination device of the utility model;

fig. 4 is a schematic structural diagram of a lithium battery blade lamination device according to the utility model.

In the figure:

100', a negative plate; 200', a positive plate; 300', a diaphragm;

100. a negative plate; 200. a positive plate; 300. a membrane material belt; 400. a monolithic separator;

1. a diaphragm unwinding mechanism; 2. a diaphragm traction mechanism; 3. a conveying platform; 4. a cutting mechanism; 5. a diaphragm positioning mechanism; 6. stacking the platforms; 7. a guide roller; 8. and rolling the rollers.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

The embodiment provides a blade lithium battery lamination device for laminating blade lithium batteries. As shown in fig. 2-3, the blade lithium battery includes a diaphragm, a positive plate 200 and a negative plate 100, the positive plates 200 and the negative plates 100 are sequentially stacked, the positive plates 200 and the negative plates 100 are staggered, the diaphragm is disposed between two adjacent plates to ensure the insulation effect of the positive plates 200 and the negative plates 100, and the diaphragm is disposed on the outer side of the top-most and bottom-most plates to wrap and protect the outer side.

In the existing stacking process of the positive plate 200 and the negative plate 100, the lamination platform is movably arranged, the lamination platform can move towards two sides respectively, and after each lamination and clamping is completed, the lamination platform needs to move towards the direction opposite to the last moving direction, so that the process of Z-shaped lamination is completed. Because the lamination platform can stretch the diaphragm to a certain extent in the moving process so as to achieve the purposes of tensioning and straightening, for the pole piece with a larger size, the tension on the edge of the diaphragm cannot be released due to the clamping of the pressing knives on the two sides of the diaphragm, so that the diaphragm is easy to wrinkle.

In order to solve the problem, the embodiment provides a blade lithium battery lamination device, as shown in fig. 4, the blade lithium battery lamination device includes a membrane unwinding mechanism 1, a membrane traction mechanism 2, a conveying platform 3, a cutting mechanism 4, a membrane positioning mechanism 5 and a stacking platform 6, the membrane unwinding mechanism 1 is used for discharging a membrane material strip 300, the membrane traction mechanism 2 is configured to convey the membrane material strip 300 to the conveying platform 3, the cutting mechanism 4 is disposed above the conveying platform 3, the cutting mechanism 4 is configured to cut the membrane material strip 300 into individual membranes 400, the membrane positioning mechanism 5 is used for bearing and positioning the individual membranes 400, the stacking platform 6 is used for bearing a plurality of sequentially stacked individual membranes 400 and is fixedly disposed relative to the membrane positioning mechanism 5, a negative electrode piece 100 or a positive electrode piece 200 is disposed between two adjacent individual membranes 400, one positive electrode tab 200 is disposed between two adjacent negative electrode tabs 100.

The blade lithium cell lamination device that this embodiment provided, when the blade lithium cell carries out the lamination, diaphragm unwinding mechanism 1 carries out the blowing of initiative with diaphragm material area 300, diaphragm material area 300 is through diaphragm drive mechanism 2, diaphragm drive mechanism 2 carries diaphragm material area 300 to conveying platform 3, according to required size, cut mechanism 4 and carry out the sola with diaphragm material area 300 and cut, in order to cut into monomer diaphragm 400, the monomer diaphragm 400 that the completion cut utilizes diaphragm positioning mechanism 5 to fix a position, later monomer diaphragm 400, positive plate 200 and negative pole piece 100 are piling up platform 6 and are accomplished the process of piling up. In the whole stacking process, the stacking platform 6 is fixedly arranged relative to the diaphragm positioning mechanism 5, repeated pulling of the single diaphragm 400 or the diaphragm material belt 300 is avoided, the cutting mechanism 4 separates the diaphragm material belt 300 into the single diaphragm 400 one by one, a diaphragm single-sheet separation mode is adopted in the lamination process, uneven diaphragm tension caused by pressing claws is avoided, tension at the edge of the single diaphragm 400 can be released, wrinkles are reduced, and the service life and reliability of a lithium battery are improved.

Further, diaphragm unwinding mechanism 1 specifically is the rotating electrical machines including unreeling the driving source, unreeling the material roller, unreels the output of driving source and connects in unreeling the roller, and around being equipped with diaphragm material area 300 on unreeling the roller, unreel the driving source and can drive unreeling the roller and rotate to the release of realization to diaphragm material area 300. By adopting the mode, the continuity of the feeding of the membrane material belt 300 is ensured, and the production time is saved.

In order to guarantee that the membrane material belt 300 can be smoothly conveyed to the conveying platform 3, the membrane traction mechanism 2 comprises a rotary driving source, a driving roller and a driven roller, the rotary driving source is specifically a rotating motor, the output end of the rotary driving source is connected to the driving roller, the rotary driving source can drive the driving roller to rotate, the membrane material belt 300 is arranged between the driving roller and the driven roller, namely, the driving roller and the driven roller are respectively and symmetrically arranged on two sides of the membrane material belt 300, two sides of the membrane material belt 300 are respectively abutted to the driving roller and the driven roller, the driving roller and the driven roller play a role in compressing the membrane material belt 300, the rotary driving source can drive the driving roller to rotate, along with the rotation of the driving roller, the membrane material belt 300 is driven to move, and the driven roller plays a follow-up role, so that the smoothness of the movement of the membrane material belt 300 is guaranteed.

If the diaphragm material area 300 of releasing from the blowing roller sets up along vertical direction, the diaphragm material area 300 that diaphragm drive mechanism 2 is pull sets up along the horizontal direction, in order to be able to convert the diaphragm material area 300 that sets up along vertical direction into along the horizontal direction, this blade lithium cell lamination device still includes guide roll 7, guide roll 7 is located between diaphragm unwinding mechanism 1 and the diaphragm drive mechanism 2, diaphragm material area 300 is around the periphery of locating guide roll 7 for the direction of diaphragm material area 300, thereby realize the direction transform of diaphragm material area 300.

After the membrane material strap 300 is conveyed to the conveying platform 3, in order to ensure the cutting accuracy of the cutting mechanism 4, the blade lithium battery lamination device further comprises a rolling roller 8, and the rolling roller 8 is arranged on the conveying platform 3 in a rolling manner and used for smoothing the membrane material strap 300. Utilize the roll of rolling roller 8 for conveying platform 3 for the both sides of diaphragm material area 300 butt respectively in rolling roller 8 and conveying platform 3 guarantee the roughness on diaphragm material area 300 surface, when preventing that the fold from appearing in diaphragm material area 300, can also guarantee to cut the precision that mechanism 4 cut diaphragm material area 300.

Further, the cutting mechanism 4 includes a moving drive source, specifically, a moving cylinder or a motor, and a cutting blade, an output end of the moving drive source is connected to the cutting blade, and the moving drive source can drive the cutting blade to move toward or away from the conveying platform 3. When the movable driving source drives the cutting knife to move towards the direction close to the conveying platform 3, the cutting knife can cut the membrane material belt 300 to form a plurality of single membranes 400; when the moving driving source drives the cutting knife to move towards the direction far away from the conveying platform 3, the cutting knife can avoid the membrane material belt 300, so that the membrane material belt 300 is fed.

The cutting knife comprises a connecting part and a tip part, one end of the connecting part is connected to the output end of the movable driving source, and the other end of the connecting part is connected to the tip part. Connecting portion set up between removal driving source and the pointed end, played the effect of intermediate junction, pointed end direct butt in diaphragm material area 300, the cutting effect is good.

Further, conveying platform 3 is including carrying driving source, action wheel, following driving wheel and conveyer belt, carries the driving source specifically to be rotating electrical machines, carries the output of driving source to connect in the action wheel, carries the driving source and can drive the action wheel and rotate, around being equipped with the conveyer belt respectively on action wheel and follow driving wheel, and the conveyer belt is used for bearing diaphragm material area 300 or monomer diaphragm 400. Can drive the action wheel through carrying the driving source and rotate, drive the removal of conveyer belt and the rotation from the driving wheel, along with the removal of conveyer belt to accomplish the transport of diaphragm material area 300 or monomer diaphragm 400, simple structure carries effectually.

Be provided with diaphragm positioning mechanism 5 in conveying platform 3's downstream direction, diaphragm positioning mechanism 5 is including location platform and regulating block, and location platform is used for bearing monomer diaphragm 400, and the regulating block slides and sets up on location platform and can the butt in the side of monomer diaphragm 400 for adjust the position of monomer diaphragm 400 for location platform, in order to accomplish the location process of monomer diaphragm 400, simple structure, convenient to use. Preferably, the number of the adjusting blocks is two, one of the adjusting blocks is used for positioning the single diaphragm 400 in the length direction, and the other adjusting block is used for positioning the single diaphragm 400 in the width direction, so that the positioning accuracy of the single diaphragm 400 is further ensured.

Further, this blade lithium cell lamination device is still including snatching the mechanism, snatch the mechanism and can snatch monomer diaphragm 400, positive plate 200 and negative pole piece 100 and carry monomer diaphragm 400, positive plate 200 and negative pole piece 100 to piling up on the platform 6 respectively, snatch the mechanism and played the effect of carrying monomer diaphragm 400, positive plate 200 and negative pole piece 100 three, according to certain lamination rule, one deck monomer diaphragm 400, one deck positive plate 200 and one deck negative pole piece 100, analogize in proper order to accomplish whole lamination process.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are based on the orientations and positional relationships shown in the drawings and are used for convenience in description and simplicity in operation, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A blade lithium battery lamination device, comprising:

the membrane unwinding mechanism (1) is used for discharging the membrane material belt (300);

a membrane traction mechanism (2) and a conveying platform (3), the membrane traction mechanism (2) being configured to convey the membrane tape (300) to the conveying platform (3);

a cutting mechanism (4) disposed above the conveying platform (3), the cutting mechanism (4) being configured to cut the membrane strip (300) into individual membranes (400);

the diaphragm positioning mechanism (5) is used for bearing the single diaphragm (400) and positioning the single diaphragm;

the stacking platform (6) is used for bearing a plurality of monomer diaphragms (400) which are sequentially stacked and fixedly arranged relative to the diaphragm positioning mechanism (5), a negative plate (100) or a positive plate (200) is arranged between every two adjacent monomer diaphragms (400), and one positive plate (200) is arranged between every two adjacent negative plates (100).

2. The lamination device for the lithium battery blades as claimed in claim 1, further comprising a guide roller (7), wherein the guide roller (7) is located between the membrane unwinding mechanism (1) and the membrane traction mechanism (2), and the membrane material belt (300) is wound around the periphery of the guide roller (7) for guiding the membrane material belt (300).

3. The blade lithium battery lamination device according to claim 1, further comprising a rolling roller (8), wherein the rolling roller (8) is arranged on the conveying platform (3) in a rolling manner and is used for flattening the membrane material belt (300).

4. The lamination device for lithium blade batteries according to claim 1, wherein the separator traction mechanism (2) comprises a rotary drive source, a drive roller and a driven roller, an output end of the rotary drive source is connected to the drive roller, the rotary drive source can drive the drive roller to rotate, the separator material belt (300) is arranged between the drive roller and the driven roller, and two sides of the separator material belt (300) are respectively abutted against the drive roller and the driven roller.

5. The lamination device for lithium blade batteries as claimed in claim 1, wherein the membrane unwinding mechanism (1) comprises an unwinding driving source and an unwinding roller, an output end of the unwinding driving source is connected to the unwinding roller, the membrane material belt (300) is wound on the unwinding roller, and the unwinding driving source can drive the unwinding roller to rotate.

6. The lamination device for lithium battery blades as claimed in claim 1, wherein the conveying platform (3) comprises a conveying driving source, a driving wheel, a driven wheel and a conveying belt, wherein the output end of the conveying driving source is connected to the driving wheel, the conveying driving source can drive the driving wheel to rotate, the conveying belt is wound on the driving wheel and the driven wheel respectively, and the conveying belt is used for bearing the membrane material belt (300) or the single membrane (400).

7. A blade lithium battery lamination device according to claim 1, wherein the diaphragm positioning mechanism (5) comprises:

a positioning platform for carrying the monolithic diaphragm (400);

the adjusting block is arranged on the positioning platform in a sliding mode, can abut against the side edge of the single diaphragm (400), and is used for adjusting the position of the single diaphragm (400) relative to the positioning platform.

8. The lithium-ion battery blade laminating device according to claim 1, wherein the cutting mechanism (4) comprises a mobile driving source and a cutting knife, an output end of the mobile driving source is connected to the cutting knife, and the mobile driving source can drive the cutting knife to move towards the conveying platform (3) for cutting the membrane material belt (300).

9. The blade lithium battery lamination device of claim 8, wherein the cutting knife includes a coupling portion and a tip portion, one end of the coupling portion being coupled to an output end of the moving drive source, and the other end being coupled to the tip portion.

10. The lithium-ion battery blade lamination device according to claim 1, further comprising a grasping mechanism capable of grasping the single separator (400), the positive electrode sheet (200), and the negative electrode sheet (100) and conveying the single separator (400), the positive electrode sheet (200), and the negative electrode sheet (100) onto the stacking platform (6), respectively.