CN111326801A

CN111326801A - Laminated composite unit manufacturing system and laminated composite unit manufacturing method

Info

Publication number: CN111326801A
Application number: CN202010241005.9A
Authority: CN
Inventors: 许正锋; 李立鹏; 童清彪; 陈飞; 阳如坤; 魏宏生
Original assignee: Shenzhen Geesun Intelligent Technology Co Ltd
Current assignee: Shenzhen Geesun Intelligent Technology Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-06-23

Abstract

The invention provides a laminated composite unit manufacturing system and a laminated composite unit manufacturing method, and relates to the technical field of lithium battery manufacturing. Compared with the prior art, the lamination unit manufacturing system provided by the invention can avoid the lamination of the diaphragm, prevent the diaphragm from being turned over and ensure the lamination quality.

Description

Laminated composite unit manufacturing system and laminated composite unit manufacturing method

Technical Field

The invention relates to the technical field of lithium battery manufacturing, in particular to a lamination composite unit manufacturing system and a lamination composite unit manufacturing method.

Background

In the manufacturing process of the conventional lamination unit, due to the size difference between the pole piece and the diaphragm of the unit piece, the edge part of the diaphragm is not compounded, so that the diaphragm is easily layered, and the risk of diaphragm turnover exists during back-end logistics conveying and lamination, so that the finished product quality of the battery cell is influenced.

In view of the above, it is important to design and manufacture a laminated composite unit manufacturing system capable of preventing the membrane from being laminated and preventing the membrane from being folded.

Disclosure of Invention

The invention aims to provide a laminated composite unit manufacturing system which can avoid the delamination of a diaphragm, prevent the diaphragm from being turned over and ensure the lamination quality.

Another object of the present invention is to provide a method for manufacturing a laminated composite unit, which can prevent the folding phenomenon during the conveying and laminating process by sealing the edges.

The invention is realized by adopting the following technical scheme.

In one aspect, the invention provides a laminated composite unit manufacturing system, which comprises a unit composite device, a membrane edge sealing device and a unit slicing device, wherein the unit composite device and the unit slicing device are arranged at intervals, the unit composite device is used for compounding to form a composite unit, the unit slicing device is used for cutting the composite unit, and the membrane edge sealing device is arranged on the discharge side of the unit composite device and is used for sealing edges of two side edges of the composite unit.

Further, the membrane edge sealing device is arranged between the unit slicing device and the unit combining device and is used for sealing edges of two side edges of the combining unit before cutting.

Further, the unfamiliar banding device includes frame, first banding area and second banding area, the frame sets up unit set up with between the unit section device, first banding area with the second banding area is established respectively the both sides of frame, just first banding area with form the confession between the second banding area the banding passageway that the compound unit passes through, first banding area with the second banding area respectively corresponding to the both sides edge of compound unit.

Furthermore, the unit slicing device comprises a bearing frame and a chasing mechanism, the bearing frame is arranged on the discharge side of the membrane edge sealing device, and the chasing mechanism is arranged on the bearing frame and used for chasing and cutting the composite units.

Further, chase after and cut the mechanism and include front driving roller, back drive roller, sharp driving piece, diaphragm cutter, preceding deflector and back deflector, front driving roller with back drive roller interval sets up bear on the frame, the diaphragm cutter preceding deflector with back deflector connects as an organic wholely and sets up front driving roller with between the back drive roller, sharp driving piece sets up bear on the frame and with the diaphragm cutter is connected for drive the diaphragm cutter is relative bear and make reciprocating motion of frame, so that the diaphragm cutter can with compound unit concerted speed motion and chase after and cut the diaphragm on the compound unit.

Further, lamination compound unit manufacturing system still includes testing arrangement and categorised removing devices, testing arrangement sets up unit section device with between the lamination device for to after the section compound unit tests, categorised removing devices sets up testing arrangement's discharge side is used for to after the test compound unit carries out NG classification removal.

Further, testing arrangement includes short circuit test mechanism and CCD detection mechanism, short circuit test mechanism with CCD detection mechanism interval sets up categorised removing device with between the unit section device, short circuit test mechanism is used for carrying out the circular telegram detection to the compound unit after the cutting, CCD detection mechanism is used for carrying out the alignment degree detection to the compound unit after the cutting.

A method of fabricating a laminated composite unit, comprising the steps of:

forming a composite unit;

sealing edges of two sides of the composite unit;

cutting the composite unit;

and laminating the cut composite units.

Further, before the step of laminating the cut composite units and after the step of cutting the composite units, the laminated composite unit manufacturing method further comprises the steps of:

testing the cut composite unit;

and NG classification and elimination are carried out on the tested composite units.

Further, the step of testing the cut composite unit includes:

carrying out power-on detection on the cut composite unit;

and detecting the alignment degree of the cut composite unit.

The invention has the following beneficial effects:

according to the lamination unit manufacturing system provided by the invention, the unit composite device is used for compounding to form the composite unit, the edge sealing treatment is carried out on the composite unit through the membrane edge sealing device after the composite unit is formed, and the composite unit is cut through the unit slicing device at the same time, wherein the edge sealing treatment is carried out on the edges of two sides of the composite unit before lamination, so that the edge parts of the membranes are sealed together, the delamination of the membranes is avoided, and the phenomenon that the membranes are turned over when the rear-end logistics are transmitted and the lamination is carried out is prevented. Compared with the prior art, the lamination unit manufacturing system provided by the invention can avoid the lamination of the diaphragm, prevent the diaphragm from being turned over and ensure the lamination quality.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a lamination composite unit manufacturing system according to a first embodiment of the present invention;

FIG. 2 is a schematic view of the membrane edge banding apparatus of FIG. 1;

FIG. 3 is a schematic view of the structure of the unit slicing apparatus shown in FIG. 1;

fig. 4 is a block diagram of the steps of a method of fabricating a laminated composite unit according to a second embodiment of the present invention.

Icon: 100-a laminated composite unit fabrication system; 110-unit composite device; 130-membrane edge banding means; 131-a frame; 133-a first edge sealing band; 135-second edge sealing band; 150-unit slicing apparatus; 151-a carrier; 153-chasing and cutting mechanism; 1531-linear drive; 1533-a membrane cutter; 1535 — front drive roller; 1536 — rear drive roller; 1537-front guide plate; 1538-a rear guide plate; 170-a lamination device; 180-a test device; 190-sorting and removing device.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships conventionally put on the products of the present invention when used, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements 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. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly and may, for example, be fixedly connected, 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As disclosed in the background, the prior art compound unit membrane turnover risks are high. Specifically, when the composite roller is rolled and compounded, due to the fact that the thickness difference exists on the unit pieces, the size of the positive electrode is smaller than that of the single side of the size of the negative electrode by about 1.5mm, and the size of the negative electrode is smaller than that of the single side of the size of the diaphragm by about 1.5mm, pressurization compounding can be achieved in the positive electrode face during compounding, but no pressure state exists in the negative electrode area and the diaphragm area, so that two layers of diaphragms of the unit pieces are layered after compounding and cutting, and the risk of diaphragm turnover exists during rear.

In addition, in the existing composite lamination machine equipment, the constant-speed tape-feeding of the pole piece is already realized at the front-section sheet-making part, but the mode has the defects that the tape-feeding linear speed of ① is low, the maximum tape-feeding speed is greatly limited due to the small tape-feeding distance caused by the acceleration and deceleration time required by the intermittent tape-feeding, the stripping risk of the composite unit exists at ②, the buffer module is required to be added between the intermittent tape-feeding of the composite unit and the manufacturing section of the composite unit due to the continuous tape-feeding of the manufactured sections, the buffer structure requires the composite tape to pass through a wrap angle more than 90 degrees, and the stripping probability of the positive corner of the composite unit is high.

In addition, the poor compound unit of the existing compound machine can not realize the classified collection, and the compound unit can be reworked and can not be reused, so that the waste of raw materials is caused. Specifically, NG products of the composite unit are not screened and classified, so that the NG products cannot be reworked.

The present invention solves the above problems by devising a new system for manufacturing laminated composite units.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.

First embodiment

Referring to fig. 1, the present embodiment provides a laminated composite unit manufacturing system 100, which can realize continuous manufacturing of composite units, improve manufacturing efficiency, prevent diaphragms from being turned over, ensure lamination quality, and can sort and reject NG unit pieces, recover short circuits, manually repair tabs and fold unit pieces, and improve raw material utilization rate.

The system 100 for manufacturing the lamination and lamination combined unit provided by the embodiment comprises a unit combining device 110, a membrane edge sealing device 130, a unit slicing device 150, a lamination device 170, a testing device 180 and a sorting and removing device 190, wherein the unit combining device 110 and the lamination device 170 are arranged at intervals, the unit combining device 110 is used for combining to form a combined unit conveyed to the lamination device 170, the unit slicing device 150 is arranged between the unit combining device and the lamination device 170 and used for cutting the combined unit, the lamination device 170 is used for laminating the cut combined unit, and the membrane edge sealing device 130 is arranged between the unit combining device and the lamination device 170 and used for sealing two side edges of the combined unit. The testing device 180 is arranged between the unit slicing device 150 and the lamination device 170 and used for testing the sliced composite units, and the sorting and removing device 190 is arranged between the testing device 180 and the lamination device 170 and used for NG sorting and removing the tested composite units.

In the present embodiment, the unit combining device 110 serves as a sheet-making combining section, and is capable of combining the positive electrode sheet, the negative electrode sheet, and the separator together to form a combined unit of the positive electrode sheet, the separator, the negative electrode sheet, and the separator. Wherein the size of the anode is less than the single side of the size of the cathode by about 1.5mm, and the size of the cathode is less than the single side of the size of the diaphragm by about 1.5 mm. The edge sealing operation is performed on the two side edges of the composite unit, namely the edges of the membranes, through the membrane edge sealing device 130, so that the layering phenomenon of the two layers of membranes can be avoided, and the turnover risk can be avoided.

It should be noted that the structure and the tabletting principle of the unit combining device 110 are consistent with those of the conventional tabletting and combining section, and are not specifically described herein.

In the present embodiment, the lamination device 170 serves as a lamination segment, and can perform lamination processing on the cut composite unit to form a battery cell. Of course, the structure and lamination principle of the lamination device 170 here corresponds to conventional lamination segments and is not described in detail here.

In this embodiment, a membrane edge sealing device 130 is disposed between the unit slicing device 150 and the unit combining device 110 for sealing both side edges of the combined unit before cutting. The cutting is carried out after the edge sealing, so that the condition that the edge sealing is not in place can be avoided, and the edge sealing effect is ensured. Of course, the membrane edge sealing device 130 may be disposed after the unit slicing device 150, and the edge sealing may be performed after slicing.

Referring to fig. 2, the membrane edge sealing device 130 includes a frame 131, a first edge sealing band 133 and a second edge sealing band 135, the frame 131 is disposed between the unit combining device 110 and the unit slicing device 150, the first edge sealing band 133 and the second edge sealing band 135 are respectively disposed at two sides of the frame 131, an edge sealing channel for the composite unit to pass through is formed between the first edge sealing band 133 and the second edge sealing band 135, and the first edge sealing band 133 and the second edge sealing band 135 respectively correspond to two side edges of the composite unit.

It should be noted that, the membrane edge sealing device 130 mentioned in this embodiment is a double-edge sealing structure, and is capable of performing edge sealing operation on two side edges of the composite unit, specifically, the edge sealing distance may be set, so that the membrane is sealed to the edge of the negative electrode, and the part of the membrane having the extra negative electrode is completely sealed.

It should be further noted that the first edge sealing tape 133 and the second edge sealing tape 135 are conventional heat-sealed edge structures, and are sealed by high temperature.

Referring to fig. 3, the unit slicing apparatus 150 includes a carrier 151 and a chase mechanism 153, the carrier 151 being disposed between the membrane edge banding apparatus 130 and the lamination apparatus 170, and the chase mechanism 153 being disposed on the carrier 151 for chasing the composite units. The compound unit is cut by the cutting mechanism 153, so that the compound unit can be continuously fed, and the sheeting efficiency is improved.

The chase cutting mechanism 153 includes a front driving roller 1535, a rear driving roller 1536, a linear driving member 1531, a membrane cutter 1533, a front guide plate 1537 and a rear guide plate 1538, the front driving roller 1535 and the rear driving roller 1536 are disposed on the carrier 151 at intervals, the membrane cutter 1533, the front guide plate 1537 and the rear guide plate 1538 are integrally connected and disposed between the front driving roller 1535 and the rear driving roller 1536, and the linear driving member 1531 is disposed on the carrier 151 and connected to the membrane cutter 1533 for driving the membrane cutter 1533 to reciprocate relative to the carrier 151, so that the membrane cutter 1533 can move at the same speed as the composite unit and chase cut the membrane on the composite unit. The linear driving piece 1531 drives the membrane cutter 1533 to move, so that the membrane cutter 1533 and the composite unit move at the same speed, the composite unit can be subjected to punching action under the condition that the composite unit conveying speed is unchanged, and the punching effect is ensured while the composite unit tabletting efficiency is improved.

The chase cutting mechanism 153 of this embodiment can perform a back-and-forth chase cutting movement in the feeding direction, the composite unit tape passes through the front driving roller 1535, the diaphragm cutter 1533 starts accelerated chase cutting, the cut unit pieces enter the rear driving roller 1536 and are conveyed to the rear end, and the diaphragm cutter 1533 returns to the original position after cutting to prepare for the next cycle.

It should be noted that the membrane cutter 1533 is consistent with a conventional punching structure, and can perform a membrane cutting function.

The testing device 180 comprises a short circuit testing mechanism and a CCD (charge coupled device) detecting mechanism, the short circuit testing mechanism and the CCD detecting mechanism are arranged between the sorting and removing device 190 and the unit slicing device 150 at intervals, the short circuit testing mechanism is used for conducting electrification detection on the cut composite units, and the CCD detecting mechanism is used for conducting alignment degree detection on the cut composite units.

In this embodiment, categorised removing devices 190 is used for categorising the compound unit after the test for NG article can be categorised and collected, conveniently retrieves and recycles. Specifically, categorised removing devices 190 includes first collection box, second collection box and NG case, and first collection box is used for retrieving the compound unit of short circuit, and the second collection box is used for retrieving utmost point ear and rolls over compound unit, and the NG case is used for placing complete NG article. The short circuit composite unit refers to a composite unit which is only in short circuit test non-conformity, the tab folding composite unit refers to a composite unit which is only in tab folding, and the complete NG product is a composite unit except the two.

It should be noted that, in this embodiment, the separation between the NG products and the non-defective products can be achieved by the mechanical arm, or by different conveying channels, and meanwhile, the NG products can be recovered by the mechanical arm or by different conveying channels, and as for the separation method, the existing separation method for screening can be referred to.

In summary, the laminated composite unit manufacturing system 100 provided in this embodiment realizes the chase cutting operation on the composite unit by the chase cutting mechanism 153, so that the composite unit can be continuously transported, and the manufacturing efficiency of the composite unit is improved. In addition, the edges of the two sides of the composite unit are sealed by the membrane sealing device 130, so that the edge parts of the membranes are sealed together, the membranes are prevented from being layered, and the phenomenon that the membranes are turned over when in logistics transmission and lamination at the back end is prevented. Finally, this embodiment is through additionally setting up categorised removing devices 190, with the categorised screening of the unqualified NG article of test, conveniently carries out recycle, avoids appearing the waste of raw and other materials.

Second embodiment

Referring to fig. 4, the present embodiment provides a method for fabricating a laminated composite unit, which is suitable for the system 100 for fabricating a laminated composite unit provided in the first embodiment, and includes the following steps:

s1: forming a composite unit.

Specifically, the membrane and the pole pieces are compounded together by the cell compounding device 110 to form a compounded cell.

S2: and sealing edges of two sides of the composite unit.

Specifically, the edge sealing operation is performed on the two side edges of the composite unit by the membrane edge sealing device 130, so as to prevent the membrane from flanging. The membrane edge sealing device 130 is used to seal the two side edges of the composite unit before cutting. The cutting is carried out after the edge sealing, so that the condition that the edge sealing is not in place can be avoided, and the edge sealing effect is ensured.

S3: and cutting the composite unit.

Specifically, the edge-sealed composite unit is cut by the unit slicing device 150, and the unit slicing device 150 can realize the tracking cutting of the composite unit through the tracking cutting mechanism 153, so that the continuous tape running of the composite unit is ensured, and the sheeting efficiency is improved.

S4: and testing the cut composite unit.

Specifically, testing the cut composite unit includes performing power-on detection on the cut composite unit and performing alignment detection on the cut composite unit. The short circuit testing device 180 is used for conducting power-on testing on the composite unit, the CCD detecting device is used for detecting the memorability and alignment degree of the composite clamping pieces, NG products are picked out, and qualified products are conveyed to the laminating device 170 for lamination.

S5: and NG classification and elimination are carried out on the tested composite units.

Specifically, carry out categorised rejection to NG article through categorised removing devices 190 for NG article can the classified collection, convenient recovery recycles.

S6: and (4) laminating the cut composite units.

Specifically, qualified composite units are laminated by the lamination device 170.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a compound unit manufacturing system of lamination, its characterized in that includes unit set composite, diaphragm banding device and unit section device, unit set composite with unit section device interval sets up, just unit set composite is used for compound formation compound unit, unit section device is used for the cutting compound unit, diaphragm banding device sets up the discharge side of unit set composite is used for right compound unit's both sides edge carries out the banding.

2. The system for manufacturing a laminated composite unit according to claim 1, wherein the membrane edge sealing device is disposed between the unit slicing device and the unit combining device for sealing both side edges of the composite unit before cutting.

3. The system according to claim 2, wherein the membrane edge sealing device comprises a frame, a first edge sealing band and a second edge sealing band, the frame is disposed between the unit combining device and the unit slicing device, the first edge sealing band and the second edge sealing band are respectively disposed on two sides of the frame, an edge sealing channel for the composite unit to pass through is formed between the first edge sealing band and the second edge sealing band, and the first edge sealing band and the second edge sealing band respectively correspond to two side edges of the composite unit.

4. The system of claim 1, wherein the cell slicing apparatus includes a carrier disposed on an exit side of the membrane edge banding apparatus and a chase mechanism disposed on the carrier for chase cutting of the composite cells.

5. The system for manufacturing the lamination composite unit according to claim 4, wherein the chasing and cutting mechanism comprises a front driving roller, a rear driving roller, a linear driving member, a diaphragm cutter, a front guide plate and a rear guide plate, the front driving roller and the rear driving roller are arranged on the bearing frame at intervals, the diaphragm cutter, the front guide plate and the rear guide plate are connected into a whole and arranged between the front driving roller and the rear driving roller, and the linear driving member is arranged on the bearing frame and connected with the diaphragm cutter and is used for driving the diaphragm cutter to reciprocate relative to the bearing frame so that the diaphragm cutter can move at the same speed as the composite unit and chase and cut a diaphragm on the composite unit.

6. The system for manufacturing a lamination composite unit according to claim 1, further comprising a testing device and a sorting and rejecting device, wherein the testing device is arranged on a discharge side of the unit slicing device and is used for testing the sliced composite unit, and the sorting and rejecting device is arranged on a discharge side of the testing device and is used for NG sorting and rejecting the tested composite unit.

7. The system for manufacturing a laminated composite unit according to claim 6, wherein the testing device comprises a short circuit testing mechanism and a CCD (charge coupled device) detecting mechanism, the short circuit testing mechanism and the CCD detecting mechanism are arranged between the sorting and removing device and the unit slicing device at intervals, the short circuit testing mechanism is used for conducting electrification detection on the cut composite unit, and the CCD detecting mechanism is used for conducting alignment detection on the cut composite unit.

8. A method of fabricating a laminated composite unit, comprising the steps of: