CN118811561A - System for preparing copper-lithium composite sheets - Google Patents

Abstract

The invention provides a system for preparing a copper-lithium composite sheet. A system for preparing copper lithium composite sheets comprising at least one unreeling assembly comprising: the main unreeling mechanism comprises a main unreeling roller, a main winding roller and a conveying roller which are sequentially arranged along the Y direction; the tape connecting mechanism is positioned between the main unreeling roller and the main reeling roller and comprises two adsorption members which are movably arranged along the X direction; each adsorption member is provided with two adsorption stations which are sequentially arranged in the Y direction, each adsorption station is provided with a vacuum state of an adsorption material belt and a vacuum breaking state of a release material belt, and the X direction and the Y direction are arranged at an included angle. The technical scheme of the invention solves the problem that the tape splicing precision is poor because of the adoption of manual tape splicing in the prior art.

Description

System for preparing copper-lithium composite sheets

Technical Field

The present invention relates to the technical field of lithium ion batteries, and in particular to a system for preparing a copper-lithium composite sheet.

Background Art

In order to solve the problem of reduced battery capacity due to irreversible consumption of positive electrode lithium ions by the solid electrolyte membrane (SEI membrane) during the first charging of lithium-ion batteries, the industry has gradually considered adopting a lithium replenishment process: a lithium source connected to the negative electrode of the battery cell is placed inside the battery cell, and after liquid injection, the lithium ions migrate to the negative electrode sheet under the action of the potential difference.

However, in the process of compounding lithium tape with diaphragm tape and copper tape, in order to achieve continuous production, the new and old tapes need to be spliced. However, current technology mostly uses manual splicing, which easily leads to poor splicing accuracy.

Summary of the invention

The main purpose of the present invention is to provide a system for preparing copper-lithium composite sheets, so as to solve the problem in the prior art that manual splicing is often used, which easily leads to poor splicing accuracy.

In order to achieve the above-mentioned purpose, the present invention provides a system for preparing a copper-lithium composite sheet, comprising at least one unwinding assembly, the unwinding assembly comprising: a main unwinding mechanism, comprising a main unwinding roller, a main winding roller and a conveying roller arranged in sequence along the Y direction; a belt splicing mechanism, located between the main unwinding roller and the main winding roller, the belt splicing mechanism comprising two adsorption components movably arranged along the X direction; wherein each adsorption component has two adsorption stations arranged in sequence in the Y direction, each adsorption station has a vacuum state for adsorbing the material belt and a vacuum-breaking state for releasing the material belt, and the X direction is arranged at an angle to the Y direction.

Through the above arrangement, compared with the prior art which uses manual alignment of the main material tape and the spare material tape resulting in poor splicing accuracy, in the present invention, the splicing accuracy can be improved by aligning the main material tape and the spare material tape using the splicing mechanism 204.

Furthermore, the unwinding assembly has a tape connection channel extending along the Y direction; the unwinding assembly also includes a backup unwinding mechanism, and along the X direction, the main unwinding mechanism and the backup unwinding mechanism are respectively located on both sides of the tape connection channel, and the backup unwinding mechanism includes a backup unwinding roller and a backup winding roller arranged at intervals along the Y direction; one of the two adsorption components is located between the main unwinding roller and the main winding roller, and the other of the two adsorption components is located between the backup unwinding roller and the backup winding roller.

Through the above arrangement, by setting the main unwinding mechanism and the spare unwinding mechanism, the main unwinding roller can unwind the main material belt (copper belt or lithium belt or diaphragm belt), and convey it to the composite assembly through the conveyor roller for composite, and the spare unwinding mechanism can tension the spare material belt (copper belt or lithium belt or diaphragm belt). When the main material belt is gradually exhausted, the two adsorption components move toward each other simultaneously along the X direction until the main material belt and the spare material belt are clamped at the same time; the main material belt and the spare material belt are cut off by the cutting knife, and then the upper adsorption station (the adsorption station close to the main winding roller) of the adsorption component on the side where the main unwinding mechanism is located is placed in a vacuum state, and the spare unwinding mechanism is in a vacuum state. The lower adsorption station of the adsorption component on the side where the mechanism is located (the adsorption station close to the spare unwinding roller) is in a vacuum state, and the remaining adsorption stations are in a broken vacuum state, and then the two adsorption components are synchronously moved away from each other. At this time, the end of the main material belt and the head end of the spare material belt are detached because they are not adsorbed, and are respectively wound and collected by the main winding roller and the spare winding roller; then the two adsorption components are moved toward each other again at the same time until the main material belt and the spare material belt are clamped at the same time to achieve the docking of the main material belt and the spare material belt, and at the same time, the two adsorption stations of the adsorption component on the side where the main unwinding mechanism is located are in a vacuum state, and the spare unwinding mechanism The two adsorption stations of the adsorption component on the side where the main material belt and the spare material belt are located are in a vacuum-breaking state, so that the main material belt and the spare material belt are simultaneously adsorbed on the adsorption component on the side where the main unwinding mechanism is located, and then the two adsorption components are synchronously moved away from each other, so that the main material belt and one side of the spare material belt can be bonded with the adhesive tape, and then the two adsorption components are simultaneously moved toward each other again until the main material belt, the spare material belt and the adhesive tape are clamped at the same time, so that the two adsorption stations of the adsorption component on the side where the spare unwinding mechanism is located are in a vacuum state, and the two adsorption stations of the adsorption component on the side where the main unwinding mechanism is located are in a vacuum-breaking state, and then the two adsorption components are synchronously moved toward each other The main material tape and the spare material tape are away from each other, and both are out of contact with the adsorption component on the side where the main unwinding mechanism is located, so that the other sides of the main material tape and the spare material tape can be connected with the tape to achieve the connection between the main material tape and the spare material tape. In this way, compared with the prior art of manually aligning the main material tape and the spare material tape, which leads to poor splicing accuracy and low quality of the composite sheet, in the present invention, the main material tape and the spare material tape are aligned by using the splicing mechanism, which can not only improve the splicing accuracy, but also avoid direct contact between the hands and the tape, thereby improving the quality of the composite sheet, and the remaining cut spare material tape can be wound up.

Furthermore, a first chamber and a second chamber are provided on the adsorption component, and the first chamber and the second chamber are spaced apart along the Y direction; a plurality of first through holes and a plurality of second through holes are provided on the side of the adsorption component facing the belt connection channel, and the plurality of first through holes are connected to the first chamber, and the plurality of second through holes are connected to the second chamber.

Through the above arrangement, the first chamber and the second chamber of each adsorption component are respectively connected to the vacuum air source, so that the plurality of first through holes and the plurality of second through holes can respectively form two adsorption stations capable of adsorbing the material strip.

Furthermore, a material strip cutting component is provided on one of the two adsorption components, and the material strip cutting component is located between the first cavity and the second cavity. The material strip cutting component is movably arranged along the X direction so that the material strip cutting component can extend into the tape connection channel.

Through the above arrangement, when the main material tape is gradually used up, the two adsorption components move toward each other simultaneously along the X direction until the main material tape and the spare material tape are clamped at the same time; the material tape cutting component can be moved along the X direction into the tape connection channel to simultaneously cut off the main material tape and the spare material tape, and then the upper adsorption station of the adsorption component on the side where the main unwinding mechanism is located is in a vacuum state, the lower adsorption station of the adsorption component on the side where the spare unwinding mechanism is located is in a vacuum state, and the remaining adsorption stations are in a broken vacuum state, and then the two adsorption components are synchronously moved away from each other. At this time, the end of the main material tape and the head end of the spare material tape are detached due to not being adsorbed, and are respectively wound and collected by the main winding roller and the spare winding roller; in this way, manual cutting of the main material tape and the spare material tape can be avoided, so as to avoid the problem of the main material tape and the spare material tape being contaminated due to accidental touching of the main material tape and the spare material tape by human hands, thereby improving the quality of the composite sheet.

Furthermore, the tape connecting mechanism also includes a tape connecting component, which includes: a tape unwinding roller; a first clamping jaw; and a second clamping jaw. Along the Y direction, the main unwinding roller, the tape unwinding roller, the first clamping jaw, the adsorption component and the second clamping jaw are arranged in sequence, and the second clamping jaw is movably arranged along the Y direction. The second clamping jaw has a clamping position close to the first clamping jaw and a pulling-out position away from the first clamping jaw.

Through the above arrangement, the first clamp clamps the tape released by the tape unwinding roller, and when the main material tape and the spare material tape are simultaneously adsorbed on the adsorption component on the side where the main unwinding mechanism is located, the two adsorption components move away from each other synchronously, so that the second clamp can move along the Y direction to pull out the tape from the first clamp and return to the initial position; the adsorption component on the side where the spare unwinding mechanism is located moves to the tape, and the two adsorption stations are in a vacuum state, so that the tape is adsorbed on the adsorption component on the side where the spare unwinding mechanism is located, and the tape is cut with a cutter, and then the adsorption component on the side where the spare unwinding mechanism is located moves along the X direction toward the side where the main unwinding mechanism is located and the tape is attached to the joint of the material tapes, so that the main material tape and the spare material tape can be bonded to one side of the main material tape and the spare material tape with the tape, so that manual bonding of the main material tape and the spare material tape can be avoided, so as to avoid the problem of contamination of the main material tape and the spare material tape due to accidental contact of the main material tape and the spare material tape by human hands, thereby improving the quality of the composite sheet.

Furthermore, the belt connecting mechanism comprises two belt connecting components. Along the X direction, the two belt connecting components are respectively located at two sides of the belt connecting channel, and the two belt connecting components are respectively arranged corresponding to the two adsorption components.

Through the above settings, the automatic connection of the main material belt and the spare material belt can be realized.

Furthermore, the system for preparing the copper-lithium composite sheet also includes a composite assembly and three unwinding assemblies arranged in parallel. The copper strip, lithium strip and diaphragm strip are respectively unwound by the three unwinding assemblies and then enter the composite assembly for composite to form a copper-lithium composite strip.

Through the above settings, the new and old material strips of copper strip, lithium strip and diaphragm strip can be automatically connected, which can not only improve the connection accuracy, but also avoid direct contact between human hands and the material strip, thereby improving the quality of the composite sheet.

Furthermore, the composite component includes: a composite roller; a pressing roller mechanism, including a frame and a first pressing roller and a second pressing roller rotatably arranged on the frame, a rolling channel is provided between the first pressing roller and the second pressing roller, and the copper strip, lithium strip and diaphragm strip are transported to the rolling channel via the composite roller.

Through the above arrangement, the first pressing roller and the second pressing roller can press the copper strip, the lithium strip and the diaphragm strip into a copper-lithium composite strip.

Furthermore, the first pressing roller and/or the second pressing roller is provided with an oil storage cavity and an oil inlet pipe communicating with the oil storage cavity.

Through the above arrangement, heat transfer oil at a certain temperature can be introduced through the oil inlet pipe to heat at least one of the first pressing roller and the second pressing roller, thereby facilitating the pressing of the copper strip, lithium strip and diaphragm strip into a copper-lithium composite strip.

Further, the second pressing roller is movably arranged relative to the first pressing roller, so that the second pressing roller can be close to or away from the first pressing roller.

Through the above-mentioned arrangement, the second pressing roller can be moved away from the first pressing roller to facilitate the copper strip, lithium strip and diaphragm strip to enter the rolling channel, and the second pressing roller can also be moved close to the first pressing roller to press the copper strip, lithium strip and diaphragm strip into a copper-lithium composite strip; at the same time, the distance between the first pressing roller and the second pressing roller can also be adjusted by moving the second pressing roller.

Further, an adjustment roller is provided between the composite roller and the pressing roller mechanism, and the adjustment roller is movably arranged along the Y direction; and/or, a plurality of adjustment rollers arranged in rows and columns are further provided downstream of the pressing roller mechanism, and each adjustment roller is movably arranged along the X direction.

Through the above arrangement, the three-layer material strip passing through the composite roller enters the adjustment roller, and the adjustment roller can be reciprocated in the Y direction by the driving mechanism, so as to adjust the wrap angle of the three-layer material strip entering the pressing roller mechanism; then the three-layer material strip is formed into a copper-lithium composite strip after being rolled by the first pressing roller and the second pressing roller, and then passes through the adjustment rollers at the rear end in turn, and the adjustment rollers downstream of the pressing roller mechanism can be reciprocated in the X direction by the driving mechanism respectively, so as to adjust the buffer length of the copper-lithium composite strip, and the adjustment rollers downstream of the pressing roller mechanism can move individually, and the copper-lithium composite strip passing through multiple adjustment rollers can enter the cutting component and the transfer component.

Furthermore, the system for preparing the copper-lithium composite sheet also includes a cutting component and a transfer component, which are successively located downstream of the composite component, and the cutting component is used to cut the copper-lithium composite strip into multiple copper-lithium composite sheets.

Through the above arrangement, the copper-lithium composite strip can enter the cutting assembly to form a plurality of copper-lithium composite sheets, and the plurality of copper-lithium composite sheets can enter the transfer assembly to be transferred and unloaded.

Furthermore, the transfer assembly includes: a transfer mechanism having a conveying surface for conveying copper-lithium composite sheets; a visual inspection mechanism having a detection end for detecting the size of the copper-lithium composite sheets, the detection end being arranged toward the conveying surface; a sorting mechanism having a sorting surface capable of receiving the copper-lithium composite sheets conveyed by the transfer mechanism; a material receiving mechanism, the sorting surface being arranged toward the material receiving mechanism, the material receiving mechanism including a first collecting structure, a second collecting structure, a first unloading structure and a second unloading structure which are arranged in sequence, the sorting mechanism being used to respectively convey multiple copper-lithium composite sheets to the first collecting structure, the second collecting structure, the first unloading structure and the second unloading structure.

Through the above arrangement, the transfer mechanism transports the cut copper-lithium composite sheets to the visual inspection mechanism. After the visual inspection mechanism detects the size after cutting, the copper-lithium composite sheets are transferred to the sorting mechanism, and the defective Class A products and Class B defective products are transported to the first collection structure and the second collection structure respectively, and the good Class A products and Class B good products are transported to the first unloading structure and the second unloading structure respectively.

Furthermore, the sorting mechanism is located above the material receiving mechanism, and the sorting mechanism includes: a plurality of driving rollers; a belt, wound around the plurality of driving rollers, the plurality of driving rollers are used to drive the belt to circulate, the belt is provided with a plurality of adsorption holes, and the lower surface of the belt forms a sorting surface; an adsorption structure, having a plurality of vacuum chambers independently arranged in sequence and a plurality of ventilation holes connected to each vacuum chamber, the ventilation holes are located on the side of the vacuum chamber facing the sorting surface, four vacuum chambers among the plurality of vacuum chambers are respectively arranged corresponding to the first collecting structure, the second collecting structure, the first unloading structure and the second unloading structure; a vacuum breaking component, used to break the vacuum in the vacuum chamber, and a vacuum breaking component is provided on the four vacuum chambers respectively arranged corresponding to the first collecting structure, the second collecting structure, the first unloading structure and the second unloading structure.

Through the above-mentioned arrangement, each vacuum chamber can be connected to the multiple adsorption holes on the corresponding position of the belt through multiple ventilation holes. By connecting the multiple vacuum chambers to the vacuum air source, negative pressure can be formed on the sorting surface of the belt, so that the multiple copper-lithium composite sheets can be adsorbed, and the driving belt can be driven to rotate in a circle to move the multiple copper-lithium composite sheets. The four vacuum chambers corresponding to the first collecting structure, the second collecting structure, the first unloading structure and the second unloading structure can be in a vacuum breaking state through the vacuum breaking component, so that the multiple copper-lithium composite sheets can be released at different positions, so that the multiple copper-lithium composite sheets can be classified and placed in the corresponding first collecting structure, the second collecting structure, the first unloading structure and the second unloading structure, so as to improve the efficiency of preparing copper-lithium composite sheets.

Furthermore, the transfer assembly also includes a cleaning mechanism, which includes: a dust collecting box, the dust collecting box includes a box body and a vacuum pipeline, the box body has a dust collecting chamber and an opening connected to the dust collecting chamber, and the vacuum pipeline is connected to the dust collecting chamber; a brush roller, which can be rotatably installed in the dust collecting chamber, and part of the brush roller protrudes from the box body and contacts with the belt.

Through the above arrangement, the belt can be powdered and dusted.

By applying the technical solution of the present invention, by setting up a belt connecting mechanism, when the main material belt is gradually used up, the two adsorption components move toward each other at the same time along the X direction until the main material belt and the spare material belt are clamped at the same time; the main material belt and the spare material belt are cut off by a cutter, and then the upper adsorption station of the left adsorption component is in a vacuum state, the lower adsorption station of the right adsorption component is in a vacuum state, and the remaining adsorption stations are in a broken vacuum state, and then the two adsorption components are synchronously moved away from each other. At this time, the end of the main material belt and the head end of the spare material belt are detached because they are not adsorbed; then the two adsorption components are moved toward each other at the same time again until the main material belt and the spare material belt are clamped at the same time to achieve the docking of the main material belt and the spare material belt, and at the same time, the two adsorption stations of the left adsorption component are in a vacuum state, and the two adsorption stations of the right adsorption component are in a broken vacuum state, so that the main material belt and the spare material belt are connected at the same time. When the adhesive tape is attached to the left side of the adsorption component, the two adsorption components are then moved away from each other synchronously, so that one side of the main material belt and the spare material belt can be bonded together by the adhesive tape, and then the two adsorption components are moved toward each other at the same time again until the main material belt, the spare material belt and the adhesive tape are clamped at the same time, so that the two adsorption stations of the adsorption component on the right are in a vacuum state, and the two adsorption stations of the adsorption component on the left are in a broken vacuum state, and then the two adsorption components are moved away from each other synchronously, and the main material belt and the spare material belt are both out of contact with the adsorption component on the left side, so that the other side of the main material belt and the spare material belt can be connected by the adhesive tape to achieve the connection between the main material belt and the spare material belt. In this way, compared with the prior art that uses manual alignment of the main material belt and the spare material belt, resulting in poor splicing accuracy, in the present invention, the splicing accuracy can be improved by aligning the main material belt and the spare material belt using a splicing mechanism.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

FIG1 shows a schematic structural diagram of an embodiment of a battery cell coated with a copper-lithium composite sheet according to the present invention; and

FIG2 is a schematic structural diagram of an embodiment of a copper-lithium composite sheet corresponding to two different types of battery cells of the present invention;

FIG3 shows a schematic structural diagram of a system for preparing a copper-lithium composite sheet according to the present invention;

FIG4 shows a schematic structural diagram of an unwinding assembly of the system for preparing a copper-lithium composite sheet of FIG3 ;

FIG5 is a schematic structural diagram showing an angle of the tape splicing mechanism of the unwinding assembly of FIG4 ;

FIG6 is a schematic structural diagram showing another angle of the tape splicing mechanism of the unwinding assembly of FIG4 ;

7 to 10 are schematic structural diagrams showing a tape splicing process of a system for preparing a copper-lithium composite sheet according to the present invention;

FIG11 is a schematic structural diagram of the dust removal mechanism of the unwinding assembly of FIG4 ;

FIG12 is a schematic diagram showing the structure of the copper strip of the present invention after laser cutting;

FIG13 shows a left side view of two main unwinding mechanisms of the lithium strip of FIG4 ;

FIG14 shows a schematic structural diagram of a composite assembly of the system for preparing a copper-lithium composite sheet of FIG3 ;

FIG15 is a schematic structural diagram of a pressing roller mechanism of the composite assembly of FIG3 ;

FIG16 shows a front view of the pressing roller mechanism of FIG3 ;

FIG17 shows a left side view of the pressing roller mechanism of FIG3 ;

FIG18 is a schematic structural diagram of a transfer assembly of the system for preparing a copper-lithium composite sheet of FIG3 ;

FIG19 is a schematic structural diagram showing an angle of the sorting mechanism and the transfer mechanism of the transfer assembly of FIG18 ;

FIG20 shows a top view of the transfer assembly of FIG19;

FIG21 is a schematic structural diagram showing the sorting mechanism and the transfer mechanism of the transfer assembly of FIG18 from another angle;

FIG. 22 shows a schematic structural diagram of the adsorption structure of the transfer mechanism of FIG. 21 ;

FIG23 shows another schematic structural diagram of the adsorption structure of the transfer mechanism of FIG21;

FIG. 24 shows a schematic structural diagram of the adsorption structure of the sorting mechanism of FIG. 21 ;

FIG. 25 shows another schematic structural diagram of the adsorption structure of the sorting mechanism of FIG. 21 ;

FIG. 26 shows a schematic structural diagram of the cleaning mechanism of the transfer assembly of FIG. 21 .

The above drawings include the following reference numerals:

10. Battery cell; 101. Positive electrode ear; 102. Negative electrode ear; 103. Copper-lithium composite sheet; 1031. Copper belt; 1032. Lithium belt; 1033. Diaphragm belt; 10311. Copper electrode ear;

20. Unwinding assembly; 201. Main unwinding roller; 202. Main winding roller; 203. Spare unwinding roller; 204. Belt splicing mechanism; 205. Spare winding roller; 206. Dust removal mechanism; 207. Demagnetization mechanism; 208. Correction mechanism; 209. Tension control mechanism; 2010. Laser cutting mechanism; 2011. Antistatic mechanism; 2012. Composite roller; 2013. Conveyor roller;

2041, tape unwinding roller; 2042, first clamping jaw; 2043, cutter; 2044, adsorption member; 20441, first through hole; 20442, second through hole; 2046, material tape cutting member; 2047, second clamping jaw;

2061, upper dust removal component; 2062, lower dust removal component;

30. Composite assembly; 301. Adjusting roller; 302. First pressing roller; 303. Second pressing roller; 304. Oil inlet pipe; 305. First inclined block; 306. Second inclined block; 307. Second guide rail; 308. First guide rail; 309. Second electric cylinder; 3010. First electric cylinder; 3011. First motor;

40. Transfer assembly; 401. Feed roller; 402. Cutting assembly; 403. Visual inspection mechanism; 404. Transfer mechanism; 405. Sorting mechanism; 406. First collecting structure; 407. Second collecting structure; 408. First unloading structure; 409. Second unloading structure; 4010. Belt; 4011. Driving roller; 4012. Tension roller; 4013. Adsorption structure; 4014. Cleaning mechanism;

40131, partition; 40132, vacuum pipeline; 40133, cover plate; 40134, vacuum breaking component;

40141. Brush roller; 40142. Second motor; 40143. Box body.

DETAILED DESCRIPTION

It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

As shown in FIG1 , in an embodiment of the present invention, after the battery cell 10 is coated with the copper-lithium composite sheet 103, the battery cell 10 includes a positive electrode ear 101 and a negative electrode ear 102. After the copper electrode ear 10311 on the copper-lithium composite sheet 103 and the negative electrode ear 102 are bonded to each other, an ultrasonic welding machine is used to weld the two together.

In the embodiment of the present invention, FIG2 is a schematic diagram of the structure of the copper-lithium composite sheet 103 corresponding to two different types of battery cells. Since there are A battery cells and B battery cells inside the lithium battery, the relative positions of the positive and negative tabs of the two are different, and therefore, the positions of the copper tabs 10311 corresponding to the copper-lithium composite sheet 103 are also different. The copper-lithium composite sheet 103 is formed by the copper strip 1031, the lithium strip 1032, and the diaphragm strip 1033 being mutually compounded under high temperature and high pressure. In the present invention, two lithium strips 1032 are placed in the interlayer of the copper strip 1031 and the diaphragm strip 1033. It is worth noting that: the present invention does not limit the specific width, quantity, length, thickness, etc. of the lithium strip 1032 in the interlayer formed by the copper strip 1031 and the diaphragm strip 1033, but preferably, the total width of the lithium strip ≤ the copper strip width ≤ the diaphragm strip width; when the copper-lithium composite sheet 103 is coated with the battery cell 10, the copper strip 1031 is in contact with and attached to the outer surface of the battery cell, and after the coating is completed, the diaphragm strip 1033 on the copper-lithium composite sheet 103 is located at the outermost side. Among them, the copper strip 1031 is made of copper strip.

It should be noted that, in the embodiment of the present invention, the Y direction is the up-down direction in FIG. 1 , and the X direction is the left-right direction in FIG. 1 .

As shown in Figures 3 to 10, an embodiment of the present invention provides a system for preparing a copper-lithium composite sheet. The system for preparing a copper-lithium composite sheet includes at least one unwinding assembly 20, and the unwinding assembly 20 includes: a main unwinding mechanism, including a main unwinding roller 201, a main winding roller 202 and a conveying roller 2013 arranged in sequence along the Y direction; a belt connecting mechanism 204, located between the main unwinding roller 201 and the main winding roller 202, and the belt connecting mechanism 204 includes two adsorption members 2044 movably arranged along the X direction; wherein each adsorption member 2044 has two adsorption stations arranged in sequence in the Y direction, each adsorption station has a vacuum state for adsorbing the material belt and a vacuum-breaking state for releasing the material belt, and the X direction and the Y direction are arranged at an angle.

In the above technical scheme, by setting the belt connecting mechanism 204, when the main material belt is gradually used up, the two adsorption components 2044 move toward each other simultaneously along the X direction until the main material belt and the spare material belt are clamped at the same time; the main material belt and the spare material belt are cut off by the cutter, and then the upper adsorption station of the left adsorption component is in a vacuum state, the lower adsorption station of the right adsorption component is in a vacuum state, and the remaining adsorption stations are in a broken vacuum state, and then the two adsorption components 2044 are synchronously moved away from each other. At this time, the end of the main material belt and the head end of the spare material belt are detached because they are not adsorbed; then the two adsorption components 2044 are moved toward each other at the same time again until the main material belt and the spare material belt are clamped at the same time to achieve the docking of the main material belt and the spare material belt, and at the same time, the two adsorption stations of the left adsorption component 2044 are in a vacuum state, and the two adsorption stations of the right adsorption component 2044 are in a broken vacuum state, so that the main material belt and the spare material belt are simultaneously adsorbed on the left The two adsorption members 2044 are on the adsorption member 2044 on the side, and then the two adsorption members 2044 are synchronously moved away from each other, so that one side of the main material belt and the spare material belt can be bonded by using the tape, and then the two adsorption members 2044 are moved toward each other at the same time again until the main material belt, the spare material belt and the tape are clamped at the same time, so that the two adsorption stations of the adsorption member 2044 on the right are in a vacuum state, and the two adsorption stations of the adsorption member 2044 on the left are in a broken vacuum state, and then the two adsorption members 2044 are synchronously moved away from each other, and the main material belt and the spare material belt are both out of contact with the adsorption member 2044 on the left, so that the other side of the main material belt and the spare material belt can be connected by using the tape to achieve the connection between the main material belt and the spare material belt. In this way, compared with the prior art that uses manual alignment of the main material belt and the spare material belt to result in poor splicing accuracy, in the present invention, the splicing accuracy can be improved by using the splicing mechanism 204 to align the main material belt and the spare material belt.

As shown in Figures 3 to 10, in an embodiment of the present invention, the unwinding assembly 20 has a tape connection channel extending along the Y direction; the unwinding assembly 20 also includes a standby unwinding mechanism, and along the X direction, the main unwinding mechanism and the standby unwinding mechanism are respectively located on both sides of the tape connection channel, and the standby unwinding mechanism includes a standby unwinding roller 203 and a standby winding roller 205 arranged at intervals along the Y direction; one of the two adsorption members 2044 is located between the main unwinding roller 201 and the main winding roller 202, and the other of the two adsorption members 2044 is located between the standby unwinding roller 203 and the standby winding roller 205.

In the above technical solution, by setting the main unwinding mechanism and the spare unwinding mechanism, the main unwinding roller 201 can unwind the main material belt (copper belt 1031 or lithium belt 1032 or diaphragm belt 1033), and convey it to the composite assembly 30 for composite via the conveying roller 2013, and the spare unwinding mechanism can tension the spare material belt (copper belt 1031 or lithium belt 1032 or diaphragm belt 1033). When the main material belt is gradually exhausted, the two adsorption members 2044 move toward each other simultaneously along the X direction until the main material belt and the spare material belt are clamped at the same time; the main material belt and the spare material belt are cut off by a cutter, and then the upper adsorption station of the adsorption member on the side where the main unwinding mechanism is located (close to the main unwinding mechanism) is moved. The suction station of the winding roller 202) is in a vacuum state, the lower suction station of the suction member on the side where the spare unwinding mechanism is located (the suction station close to the spare unwinding roller 203) is in a vacuum state, and the remaining suction stations are in a broken vacuum state, and then the two suction members 2044 are synchronously moved away from each other. At this time, the end of the main material belt and the head end of the spare material belt are detached because they are not adsorbed, and are respectively wound and collected by the main winding roller 202 and the spare winding roller 205; then the two suction members 2044 are moved toward each other at the same time again until the main material belt and the spare material belt are clamped at the same time to achieve the docking of the main material belt and the spare material belt, and at the same time, the suction member on the side where the main unwinding mechanism is located The two adsorption stations of 2044 are in a vacuum state, and the two adsorption stations of the adsorption member 2044 on the side where the spare unwinding mechanism is located are in a broken vacuum state, so that the main material belt and the spare material belt are adsorbed on the adsorption member 2044 on the side where the main unwinding mechanism is located at the same time, and then the two adsorption members 2044 are synchronously moved away from each other, so that the main material belt and one side of the spare material belt can be bonded with the adhesive tape, and then the two adsorption members 2044 are moved toward each other again at the same time until the main material belt, the spare material belt and the adhesive tape are clamped at the same time, so that the two adsorption stations of the adsorption member 2044 on the side where the spare unwinding mechanism is located are in a vacuum state, and the adsorption member 2044 on the side where the main unwinding mechanism is located is in a vacuum state. 4 is in a vacuum breaking state, and then the two adsorption members 2044 are synchronously moved away from each other, and the main material belt and the spare material belt are both out of contact with the adsorption member 2044 on the side where the main unwinding mechanism is located, so that the other sides of the main material belt and the spare material belt can be connected with the tape to achieve the connection between the main material belt and the spare material belt. In this way, compared with the prior art of manually aligning the main material belt and the spare material belt, resulting in poor splicing accuracy and low quality of the composite sheet, in the present invention, by using the splicing mechanism 204 to align the main material belt and the spare material belt, not only the splicing accuracy can be improved, but also the direct contact of human hands with the material belt can be avoided, thereby improving the quality of the composite sheet.

It should be noted that, in the embodiment of the present invention, the spare material strip unwound by the spare unwinding roller 203 is tensioned by the spare winding roller 205 .

It should be noted that, in the embodiment of the present invention, the side where the main unwinding mechanism is located refers to the left side of the tape splicing channel in FIG. 4 , and the side where the standby unwinding mechanism is located refers to the right side of the tape splicing channel in FIG. 4 .

As shown in Figures 5 and 6, in an embodiment of the present invention, a first chamber and a second chamber are provided on the adsorption member 2044, and the first chamber and the second chamber are spaced apart along the Y direction; a plurality of first through holes 20441 and a plurality of second through holes 20442 are provided on the side of the adsorption member 2044 facing the belt connection channel, and the plurality of first through holes 20441 are connected to the first chamber, and the plurality of second through holes 20442 are connected to the second chamber.

Through the above arrangement, the first chamber and the second chamber of each adsorption component 2044 are respectively connected to the vacuum air source, so that the multiple first through holes 20441 and the multiple second through holes 20442 can respectively form two adsorption stations capable of adsorbing the material strip.

Preferably, in an embodiment of the present invention, the system for preparing a copper-lithium composite sheet further includes a vacuum air source, a pipeline for connecting the vacuum air source with the first chamber, a pipeline for connecting the vacuum air source with the second chamber, and a control valve disposed on each pipeline, so as to make the first chamber and/or the second chamber of each adsorption member 2044 in a vacuum state. The arrangement of the above pipelines and control valves can adopt the existing technology and will not be repeated here.

As shown in Figures 5 and 6, in an embodiment of the present invention, a material strip cutting component 2046 is provided on one of the two adsorption components 2044, and the material strip cutting component 2046 is located between the first chamber and the second chamber. The material strip cutting component 2046 is movably arranged along the X direction so that the material strip cutting component 2046 can extend into the tape connection channel.

Through the above arrangement, when the main material tape is gradually used up, the two adsorption members 2044 move toward each other simultaneously along the X direction until the main material tape and the spare material tape are clamped at the same time; the material tape cutting member 2046 can be moved along the X direction into the tape connection channel to cut off the main material tape and the spare material tape at the same time, and then the upper adsorption station of the adsorption member on the side where the main unwinding mechanism is located (the adsorption station close to the main winding roller 202) is in a vacuum state, and the lower adsorption station of the adsorption member on the side where the spare unwinding mechanism is located (the adsorption station close to the spare unwinding roller 20 3) is in a vacuum state, and the remaining adsorption stations are in a broken vacuum state, and then the two adsorption components 2044 are synchronously moved away from each other. At this time, the end of the main material belt and the head end of the spare material belt are detached because they are not adsorbed, and are respectively wound and collected by the main winding roller 202 and the spare winding roller 205; in this way, manual cutting of the main material belt and the spare material belt can be avoided, so as to avoid the problem of the main material belt and the spare material belt being contaminated due to accidental touching of the main material belt and the spare material belt by human hands, thereby improving the quality of the composite sheet.

In one embodiment, the main material tape and the spare material tape may also be cut manually.

Preferably, in the embodiment of the present invention, the material strip cutting component 2046 is a cutter.

As shown in Figure 8, in an embodiment of the present invention, the tape connecting mechanism 204 also includes a tape connecting component, which includes: a tape unwinding roller 2041; a first clamping jaw 2042; and a second clamping jaw 2047. Along the Y direction, the main unwinding roller 201, the tape unwinding roller 2041, the first clamping jaw 2042, the adsorption component 2044 and the second clamping jaw 2047 are arranged in sequence, and the second clamping jaw 2047 is movably arranged along the Y direction. The second clamping jaw 2047 has a clamping position close to the first clamping jaw 2042 and a pulling-out position away from the first clamping jaw 2042.

Through the above arrangement, the first clamp 2042 clamps the tape released by the tape unwinding roller 2041. When the main material tape and the spare material tape are simultaneously adsorbed on the adsorption member 2044 on the side where the main unwinding mechanism is located, the two adsorption members 2044 move away from each other synchronously, so that the second clamp 2047 can move along the Y direction to pull out the tape from the first clamp 2042 and return to the initial position; the adsorption member on the side where the spare unwinding mechanism is located moves to the tape, and the two adsorption stations are in a vacuum state, so that the tape is adsorbed. On the adsorption member 2044 on the side where the spare unwinding mechanism is located, the tape is cut with a cutter, and then the adsorption member 2044 on the side where the spare unwinding mechanism is located moves along the X direction toward the side where the main unwinding mechanism is located and the tape is attached to the joint of the material tapes, so that the main material tape and one side of the spare material tape can be bonded with the tape, so that the main material tape and the spare material tape can be bonded manually, so as to avoid the problem of the main material tape and the spare material tape being contaminated due to the manual touch of the main material tape and the spare material tape, thereby improving the quality of the composite sheet. Similarly, the other side of the main material tape and the spare material tape can be connected with the tape to realize the automatic connection between the main material tape and the spare material tape.

Preferably, in an embodiment of the present invention, the tape connecting member further comprises a cutter 2043 movably arranged along the X direction to cut the tape, and the cutter 2043 is located between the first clamping jaw 2042 and the adsorption member 2044 .

As shown in Fig. 8 and Fig. 9, in the embodiment of the present invention, the belt connecting mechanism 204 includes two belt connecting components, which are respectively located on both sides of the belt connecting channel along the X direction, and the two belt connecting components are respectively arranged corresponding to the two adsorption components 2044. There are two cutters 2043, and the two cutters 2043 are arranged corresponding to the two belt connecting components.

Through the above arrangement, when the main material belt and the spare material belt are clamped at the same time, the two adsorption stations of the adsorption member 2044 on the side where the main unwinding mechanism is located (the left side in Figure 8) are in a vacuum state, and the two adsorption stations of the adsorption member 2044 on the side where the spare unwinding mechanism is located (the right side in Figure 8) are in a broken vacuum state, and the main material belt and the spare material belt are simultaneously adsorbed on the adsorption member 2044 on the left; after the two adsorption members 2044 synchronously move away from each other, the second clamping jaw 2047 on the right side moves downward along the Y direction to pull out the tape from the corresponding first clamping jaw 2042 and return to the initial position; the adsorption member 2044 on the right side moves to the tape, and the two adsorption stations are in a vacuum state, so that the tape is adsorbed on the adsorption member 2044 on the right side; then the tape is cut by the right cutter 2043, so that the right adsorption member 2044 moves along the X direction to stick the tape to the joint of the material belts. Similarly, after the right adsorption member 2044 sticks the tape to the joint of the material strip, the two adsorption stations of the right adsorption member 2044 are both in a vacuum state. At this time, the two adsorption stations of the left adsorption member 2044 are both in a broken vacuum state. After the two adsorption members 2044 move away from each other synchronously, the material strip is out of contact with the left adsorption member 2044; the left second clamp 2047 moves downward along the Y direction to pull out the tape from the left first clamp 2042 and return to the initial position; the left adsorption member 2044 moves to the tape, and the two adsorption stations are in a vacuum state, so that the tape is adsorbed on the left adsorption member 2044, and then the left cutter 2043 is used to cut the tape, and the left adsorption member 2044 is used to move along the X direction to stick the tape to the joint of the material strip. In this way, the automatic connection of the main material strip and the spare material strip can be realized.

It should be noted that, in an embodiment of the present invention, a material strip cutting component 2046 is arranged inside the adsorption component 2044 on the side where the main unwinding mechanism is located, and the first through hole 20441 and the second through hole 20442 on the same adsorption component 2044 are independently controlled by each other; the first clamping jaw 2042 and the second clamping jaw 2047 are both controlled to open and close by a cylinder, and the second clamping jaw 2047 can be reciprocated along the Y direction by a driving mechanism (such as a cylinder, etc.); the cutter 2043, the material strip cutting component 2046 and the two adsorption components 2044 can be reciprocated along the X direction by a driving mechanism (such as a cylinder, etc.); the above-mentioned material strip cutting component 2046 can also be arranged inside the adsorption component 2044 on the side where the backup unwinding mechanism is located.

As shown in Figure 10, in an embodiment of the present invention, after completing the gluing of both sides of the material strip joint, the exhausted main material roll is manually removed from the main unwinding roller 201 and replaced with a new main material roll. The new main material roll is tensioned by the main winding roller 202 after being unwound. After the spare material roll is exhausted, the above steps are repeated again for automatic splicing.

As shown in FIG3 and FIG4, in an embodiment of the present invention, the system for preparing a copper-lithium composite sheet includes a composite assembly 30 and three unwinding assemblies 20 arranged in parallel. The copper strip 1031, the lithium strip 1032 and the diaphragm strip 1033 are respectively unwound by the three unwinding assemblies 20 and then enter the composite assembly 30 for composite to form a copper-lithium composite strip. In this way, the new and old strips of the copper strip 1031, the lithium strip 1032 and the diaphragm strip 1033 can be automatically spliced, which can not only improve the splicing accuracy, but also avoid direct contact between the strips by human hands, thereby improving the quality of the composite sheet.

Specifically, as shown in Figure 4, in an embodiment of the present invention, after the copper strip 1031 on the main unwinding roller 201 is unwound, it passes through the strip splicing mechanism 204, the dust removal mechanism 206, the demagnetization mechanism 207, the correction mechanism 208, the tension control mechanism 209, and the laser cutting mechanism 2010 in sequence, wherein the strip splicing mechanism 204 is used to realize the automatic docking of the main material strip and the spare material roll when the copper strip 1031 on the main unwinding roller 201 is used up; the dust removal mechanism 206 is used to remove metal dust on the surface of the material strip during its movement; the demagnetization mechanism 207 is used to remove iron impurities on the surface of the material strip during its movement; the correction mechanism 208 is used to ensure that the material strip does not deflect during its movement; the tension control mechanism 209 is used to ensure that the tension of the material strip always fluctuates within a reasonable range; the laser cutting mechanism 2010 is used to cut the copper pole ear 10311 on the copper strip 1031. Among them, the demagnetization mechanism 207, the demagnetization mechanism 207, the correction mechanism 208, the tension control mechanism 209 and the laser cutting mechanism 2010 can adopt the existing technology and will not be repeated here.

Specifically, as shown in FIG. 11 , in the embodiment of the present invention, the dust removal mechanism 206 includes an upper dust removal member 2061 and a lower dust removal member 2062 that are spaced apart, the material belt (copper belt 1031, lithium belt 1032, diaphragm belt 1033) is located between the upper dust removal member 2061 and the lower dust removal member 2062, and a dust removal channel is formed between the upper dust removal member 2061 and the lower dust removal member 2062, and compressed air is passed from the inlet of the upper dust removal member 2061 into the upper dust removal member 2062. The dust removing component 2061 is provided with a dust removing hole connected to the interior of the upper dust removing component 2061 on one side facing the dust removing passage, and the dust removing hole connected to the interior of the lower dust removing component 2062 on the other side facing the dust removing passage.

Specifically, as shown in FIG12, in the embodiment of the present invention, L is the length of the copper strip 1031 in a single copper-lithium composite sheet 103, and the present invention cuts the copper tabs 10311 required for the A battery cell and the B battery cell at intervals. As shown in FIG2, for the A battery cell, the distance between the copper tab 10311 and the head end of the single copper strip is M, and for the B battery cell, the distance between the copper tab 10311 and the tail end of the single copper strip is M, wherein the head end and the tail end are the opposite ends in the length direction of the copper-lithium composite sheet.

Specifically, as shown in FIG4 , in an embodiment of the present invention, the unwinding assembly 20 for passing the lithium ribbon 1032 includes two main unwinding mechanisms, two standby unwinding mechanisms, and two tape splicing mechanisms 204. After being unwound, the lithium ribbon 1032 on the main unwinding roller 201 passes through the tape splicing mechanism 204, the dust removal mechanism 206, the demagnetization mechanism 207, the deviation correction mechanism 208, and the tension control mechanism 209 in sequence.

Specifically, as shown in Figure 13, in an embodiment of the present invention, the two main unwinding rollers 201 and the two spare unwinding rollers 203 are spatially staggered. Preferably, the two main unwinding rollers 201 are spaced apart in a direction perpendicular to the paper surface of Figure 4, and the two spare unwinding rollers 203 are spaced apart in a direction perpendicular to the paper surface of Figure 4.

Specifically, as shown in Figure 4, in an embodiment of the present invention, after the diaphragm belt 1033 on the main unwinding roller 201 is unwound, it passes through the belt connecting mechanism 204, the dust removal mechanism 206, the static electricity removal mechanism 2011, the deviation correction mechanism 208, and the tension control mechanism 209 in sequence. Among them, the static electricity removal mechanism 2011 has the function of eliminating the static electricity on the diaphragm belt 1033 to prevent the diaphragm belt from wrinkling during the unwinding process. The static electricity removal mechanism 2011 can adopt the existing technology and will not be repeated here.

As shown in Figures 4 and 14 to 17, in an embodiment of the present invention, the composite component 30 includes: a composite roller 2012; a pressing roller mechanism, including a frame and a first pressing roller 302 and a second pressing roller 303 rotatably arranged on the frame, and a rolling channel is provided between the first pressing roller 302 and the second pressing roller 303, and the copper strip 1031, the lithium strip 1032 and the diaphragm strip 1033 are transported to the rolling channel via the composite roller 2012.

Through the above arrangement, the first pressing roller 302 and the second pressing roller 303 can press the copper strip 1031 , the lithium strip 1032 and the separator strip into a copper-lithium composite strip.

Specifically, as shown in FIG. 4 , in an embodiment of the present invention, a copper strip 1031 , two lithium strips 1032 , and a diaphragm strip 1033 simultaneously enter the composite roller 2012 for composite and enter the composite assembly 30 at the rear end.

As shown in FIG15 , in the embodiment of the present invention, an oil storage cavity and an oil inlet pipe 304 connected to the oil storage cavity are provided on the first pressing roller 302 and/or the second pressing roller 303. In this way, heat transfer oil of a certain temperature can be introduced through the oil inlet pipe 304 to heat at least one of the first pressing roller 302 and the second pressing roller 303, so as to facilitate the pressing of the copper strip 1031, the lithium strip 1032 and the diaphragm strip into a copper-lithium composite strip.

As shown in FIGS. 15 to 17 , in the embodiment of the present invention, the second pressing roller 303 is movably arranged relative to the first pressing roller 302, so that the second pressing roller 303 can be close to or away from the first pressing roller 302. In this way, the second pressing roller 303 can be moved away from the first pressing roller 302 to facilitate the copper strip 1031, the lithium strip 1032 and the diaphragm strip 1033 to enter the rolling channel, and the second pressing roller 303 can also be moved close to the first pressing roller 302 to press the copper strip 1031, the lithium strip 1032 and the diaphragm strip 1033 into a copper-lithium composite strip; at the same time, the spacing between the first pressing roller 302 and the second pressing roller 303 can also be adjusted by moving the second pressing roller 303.

Specifically, as shown in Figures 15 to 17, in an embodiment of the present invention, the first pressure roller 302 and the second pressure roller 303 are respectively driven to rotate by two first motors 3011, the first pressure roller 302 is fixedly installed in the frame, and the second pressure roller 303 is installed on the frame through the first guide rail 308, the first electric cylinder 3010 is fixed to the frame and the first electric cylinder 3010 can drive the second pressure roller 303 to move along the Y direction, so that the second pressure roller 303 can approach or move away from the first pressure roller 302.

Specifically, as shown in Figures 15 to 17, in an embodiment of the present invention, the pressure roller mechanism also includes a first inclined block 305, a second inclined block 306 abutting against the first inclined block 305, a second electric cylinder 309 for driving the first inclined block 305 to move along the X direction, and a second guide rail 307 fixed to the frame. The second pressure roller 303 is installed on the first guide rail 308 through the second inclined block 306, and the first inclined block 305 is slidably matched with the second guide rail 307. The first inclined block 305 moves to the left (along the X direction) on the second guide rail 307 in Figure 17, which can increase the gap between the first pressure roller 302 and the second pressure roller 303.

Specifically, as shown in Figures 15 to 17, in an embodiment of the present invention, a first inclined surface is provided at one end of the first inclined block 305 facing the second inclined block 306, and a second inclined surface is provided at one end of the second inclined block 306 facing the first inclined block 305, the first inclined surface and the second inclined surface have the same inclination, and the first inclined surface and the second inclined surface are arranged in abutment with each other.

As shown in Figure 14, in an embodiment of the present invention, an adjustment roller 301 is provided between the composite roller 2012 and the pressure roller mechanism, and the adjustment roller 301 is movably provided along the Y direction; and/or, a plurality of adjustment rollers 301 arranged in rows and columns are also provided downstream of the pressure roller mechanism, and each adjustment roller 301 is movably provided along the X direction.

Through the above arrangement, the three-layer material strip (copper strip 1031, lithium strip 1032, diaphragm strip 1033) passing through the composite roller 2012 enters the adjustment roller 301, and the adjustment roller 301 can be reciprocated along the Y direction by a driving mechanism (such as an electric cylinder, etc.), so as to adjust the wrap angle of the three-layer material strip entering the pressing roller mechanism; then the three-layer material strip is rolled by the first pressing roller 302 and the second pressing roller 303 to form a copper-lithium composite strip, and then passes through each adjustment roller 301 at the rear end in turn, and each adjustment roller 301 downstream of the pressing roller mechanism can be reciprocated along the X direction by a driving mechanism (such as an electric cylinder, etc.), so as to adjust the buffer length of the copper-lithium composite strip, and each adjustment roller 301 downstream of the pressing roller mechanism can move independently, and the copper-lithium composite strip passing through multiple adjustment rollers 301 can enter the cutting component 402 and the transfer component 40.

As shown in FIG3 , in an embodiment of the present invention, the system for preparing the copper-lithium composite sheet further includes a cutting assembly 402 and a transfer assembly 40, which are sequentially located downstream of the composite assembly 30, and the cutting assembly 402 is used to cut the copper-lithium composite strip into a plurality of copper-lithium composite sheets 103. In this way, the copper-lithium composite strip can enter the cutting assembly 402 to form a plurality of copper-lithium composite sheets 103, and the plurality of copper-lithium composite sheets 103 enter the transfer assembly 40 for transfer and unloading.

Preferably, as shown in FIG. 18 , in an embodiment of the present invention, the system for preparing the copper-lithium composite sheet further comprises a feed roller 401 located between the composite component 30 and the cutting component 402 , and the feed roller 401 clamps and drives the copper-lithium composite tape to move forward.

As shown in Figure 18, in an embodiment of the present invention, the transfer component 40 includes: a transfer mechanism 404, having a conveying surface for conveying the copper-lithium composite sheet 103; a visual inspection mechanism 403, having a detection end for detecting the size of the copper-lithium composite sheet 103, and the detection end is arranged toward the conveying surface; a sorting mechanism 405, having a sorting surface capable of receiving the copper-lithium composite sheet 103 conveyed by the transfer mechanism 404; a receiving mechanism, wherein the sorting surface is arranged toward the receiving mechanism, and the receiving mechanism includes a first collecting structure 406, a second collecting structure 407, a first unloading structure 408 and a second unloading structure 409 which are arranged in sequence, and the sorting mechanism 405 is used to respectively convey multiple copper-lithium composite sheets 103 to the first collecting structure 406, the second collecting structure 407, the first unloading structure 408 and the second unloading structure 409.

Through the above arrangement, the transfer mechanism 404 transports the cut copper-lithium composite sheet 103 to the visual inspection mechanism 403. After the visual inspection mechanism 403 detects the cut size, the copper-lithium composite sheet 103 is transferred to the sorting mechanism 405, and the defective Class A products (corresponding to the copper-lithium composite sheet of the A battery cell) and the defective Class B products (corresponding to the copper-lithium composite sheet of the B battery cell) are transported to the first collection structure 406 and the second collection structure 407 respectively, and the good Class A products (corresponding to the copper-lithium composite sheet of the A battery cell) and the good Class B products (corresponding to the copper-lithium composite sheet of the B battery cell) are transported to the first unloading structure 408 and the second unloading structure 409 respectively.

Preferably, in the embodiment of the present invention, the cutting component 402 is a cutter.

It should be noted that in the embodiment of the present invention, the visual detection mechanism 403 can adopt existing technology, which will not be described in detail here.

Specifically, in the embodiment of the present invention, the transfer mechanism 404 includes a plurality of driving rollers 4011, an adsorption structure 4013 and a belt 4010. The belt 4010 is wound around the plurality of driving rollers 4011, and the plurality of driving rollers 4011 are used to drive the belt 4010 to circulate and rotate. The belt 4010 is provided with a plurality of adsorption holes, and the upper surface of the belt 4010 forms a conveying surface; the adsorption structure 4013 of the transfer mechanism 404 includes a shell with an opening and a plurality of partitions 40131 located inside the shell, which divide the inside of the shell into a plurality of independent vacuum chambers, and both sides of each vacuum chamber are connected with a vacuum pipeline 40132, which is connected to the shell, and the opening of the shell is covered with a cover plate 40133, and the surface of the cover plate is provided with the plurality of ventilation holes mentioned above, and the belt 4010 is located at the periphery of the adsorption structure 4013, and the plurality of ventilation holes are arranged toward the conveying surface.

As shown in FIGS. 18 to 25 , in the embodiment of the present invention, the sorting mechanism 405 is located above the material receiving mechanism, and the sorting mechanism 405 includes: a plurality of driving rollers 4011; a belt 4010, which is wound around the plurality of driving rollers 4011, and the plurality of driving rollers 4011 are used to drive the belt 4010 to circulate, and the belt 4010 is provided with a plurality of adsorption holes, and the lower surface of the belt 4010 forms a sorting surface; an adsorption structure 4013, which has a plurality of vacuum chambers which are independently arranged in sequence and a plurality of ventilation holes which are connected to each vacuum chamber; Hole, the vent hole is located on the side of the vacuum chamber facing the sorting surface, four vacuum chambers among the multiple vacuum chambers are respectively arranged corresponding to the first collecting structure 406, the second collecting structure 407, the first unloading structure 408 and the second unloading structure 409; a vacuum breaking component 40134 is used to break the vacuum of the vacuum chamber, and the four vacuum chambers respectively arranged corresponding to the first collecting structure 406, the second collecting structure 407, the first unloading structure 408 and the second unloading structure 409 are provided with a vacuum breaking component 40134.

Through the above-mentioned arrangement, each vacuum chamber can be connected to the multiple adsorption holes on the corresponding positions of the belt 4010 through multiple ventilation holes. By connecting the multiple vacuum chambers to the vacuum air source, negative pressure can be formed on the sorting surface of the belt 4010, so that the multiple copper-lithium composite sheets 103 can be adsorbed, and the driving belt 4010 can be driven to rotate in a circle, so that the multiple copper-lithium composite sheets 103 can be moved. The four vacuum chambers corresponding to the first collection structure 406, the second collection structure 407, the first unloading structure 408 and the second unloading structure 409 can be in a vacuum-breaking state through the vacuum-breaking component 40134, so that the multiple copper-lithium composite sheets 103 can be released at different positions, so that the multiple copper-lithium composite sheets 103 can be classified and placed in the corresponding first collection structure 406, the second collection structure 407, the first unloading structure 408 and the second unloading structure 409.

Preferably, as shown in Figures 19 to 21, in an embodiment of the present invention, the sorting mechanism 405 also includes a tension roller 4012 located on one side of the belt 4010, and the tension roller 4012 can be moved along the up and down directions in Figure 19 through a driving mechanism (such as an electric cylinder, etc.), thereby adjusting the tension of the belt 4010.

As shown in Figures 22 to 25, in an embodiment of the present invention, the adsorption structure 4013 of the sorting mechanism 405 includes a shell with an opening and a plurality of partitions 40131 located inside the shell, which divide the interior of the shell into a plurality of independent vacuum chambers, and each vacuum chamber is connected to both sides with a vacuum pipeline 40132, the vacuum pipeline 40132 is connected to the shell, and the opening of the shell is covered with a cover plate 40133, and the surface of the cover plate 40133 is distributed with the above-mentioned plurality of ventilation holes; the vacuum chambers at the corresponding positions of the first collecting structure 406, the second collecting structure 407, the first unloading structure 408 and the second unloading structure 409 are also connected to a vacuum breaking component 40134.

Preferably, as shown in FIG. 22 to FIG. 25 , in an embodiment of the present invention, the vacuum breaking component 40134 is an air intake pipe.

As shown in Fig. 19, Fig. 21 and Fig. 26, in the embodiment of the present invention, the transfer assembly 40 further includes a cleaning mechanism 4014, which includes: a dust collecting box, which includes a box body 40143 and a vacuum pipeline 40132, the box body 40143 has a dust collecting cavity and an opening communicating with the dust collecting cavity, and the vacuum pipeline 40132 communicates with the dust collecting cavity; a brush roller 40141, which is rotatably installed in the dust collecting cavity, and a part of the brush roller 40141 protrudes from the box body 40143 and contacts with the belt 4010. In this way, the belt can be brushed to remove dust.

Preferably, as shown in FIG. 21 , in an embodiment of the present invention, the brush roller 40141 may be located on a side of the belt 4010 facing the driving roller 4011 , or may be located on a side of the belt 4010 facing away from the driving roller 4011 .

Preferably, as shown in FIG. 21 , in an embodiment of the present invention, the brush roller 40141 is driven to rotate by the second motor 40142 , and the surface of the brush roller 40141 is in contact with the surface of the belt 4010 .

It should be noted that, in the embodiment of the present invention, in the initial state, the interior of the vacuum chambers on the transfer mechanism 404 and the sorting mechanism 405 are always in a vacuum state. When the copper-lithium composite sheet 103 is transferred from the belt on the transfer mechanism 404 to the belt on the sorting mechanism 405, the defective products identified by the visual inspection mechanism 403 move to the corresponding first collection structure 406 and the second collection structure 407, and the vacuum breaking components 40134 on the corresponding independent vacuum chambers are rushed into compressed air to break the vacuum, and the defective products fall into the waste collection position by their own gravity. Similarly, after the qualified products identified by the visual inspection mechanism 403 move to the corresponding first unloading structure 408 and the second unloading structure 409, the vacuum breaking components 40134 on the corresponding vacuum chambers are rushed into compressed air to break the vacuum, and the qualified products fall into the first unloading structure 408 and the second unloading structure 409 by their own gravity.

It should be noted that the present invention has the following advantages:

1. It realizes the automatic tape splicing function, eliminating the need for manual glue preparation and reducing the difficulty of operation.

Second, several lithium ribbon rolls are spatially staggered, which can be suitable for lithium ribbons of different numbers and widths, taking into account different design processes to improve the poor ability to accommodate process changes.

3. Alternating laser cutting is respectively applicable to the copper tabs of the A cell and the B cell. The sorting mechanism is respectively provided with corresponding waste rejection positions (the first collecting structure 406 and the second collecting structure 407) and material unloading positions (the first unloading structure 408 and the second unloading structure 409), so that a single machine can simultaneously obtain different types of copper-lithium composite sheets under the same efficiency, so as to realize the rapid synchronous manufacturing of different types of copper-lithium composite sheets, thereby avoiding the mode of using two machines for separate manufacturing, which leads to the problem that the equipment occupies a large space and has low space utilization.

Fourth, the gap between the first pressing roller 302 and the second pressing roller 303 can be automatically adjusted through the cooperation of the first inclined block 305 and the second inclined block 306, and the adjustment is faster and more accurate, thereby avoiding the problem of low adjustment efficiency and poor accuracy caused by manual adjustment.

5. There is no need to use a robot to frequently remove waste materials and discharge qualified products, which not only makes the equipment more compact but also significantly improves efficiency.

It should be noted that in the embodiment of the present invention, the main unwinding roller 201, the main winding roller 202, the conveying roller 2013, the spare unwinding roller 203, the spare winding roller 205, the tape unwinding roller 2041, the composite roller 2012, the adjustment roller 301, the feed roller 401, the driving roller 4011, the tension roller 4012, and the brush roller 40141 are all rotatably arranged, and can be driven by a motor to achieve rotation.

It should be noted that, in the embodiment of the present invention, the downstream is located in the conveying direction of the material belt (copper belt 1031, lithium belt 1032, and diaphragm belt 1033).

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: by setting up a belt connecting mechanism, when the main material belt is gradually used up, the two adsorption components move toward each other at the same time along the X direction until the main material belt and the spare material belt are clamped at the same time; the main material belt and the spare material belt are cut off by a cutter, and then the upper adsorption station of the left adsorption component is in a vacuum state, the lower adsorption station of the right adsorption component is in a vacuum state, and the remaining adsorption stations are in a broken vacuum state, and then the two adsorption components are synchronously moved away from each other. At this time, the end of the main material belt and the head end of the spare material belt are detached because they are not adsorbed; then the two adsorption components are moved toward each other at the same time again until the main material belt and the spare material belt are clamped at the same time to achieve the docking of the main material belt and the spare material belt, and at the same time, the two adsorption stations of the left adsorption component are in a vacuum state, and the two adsorption stations of the right adsorption component are in a broken vacuum state. The main material belt and the spare material belt are adsorbed on the adsorption component on the left at the same time, and then the two adsorption components are synchronously moved away from each other so that one side of the main material belt and the spare material belt can be bonded by using the tape, and then the two adsorption components are simultaneously moved toward each other again until the main material belt, the spare material belt and the tape are clamped at the same time, so that the two adsorption stations of the adsorption component on the right are in a vacuum state, and the two adsorption stations of the adsorption component on the left are in a broken vacuum state, and then the two adsorption components are synchronously moved away from each other, and the main material belt and the spare material belt are both out of contact with the adsorption component on the left, so that the other side of the main material belt and the spare material belt can be connected by using the tape to achieve the connection between the main material belt and the spare material belt. In this way, compared with the prior art that uses manual alignment of the main material belt and the spare material belt, resulting in poor splicing accuracy, in the present invention, the splicing accuracy can be improved by aligning the main material belt and the spare material belt using a splicing mechanism.

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

Claims (15)

1. A system for preparing a copper-lithium composite sheet, characterized in that it comprises at least one unwinding assembly (20), wherein the unwinding assembly (20) comprises: A main unwinding mechanism comprises a main unwinding roller (201), a main winding roller (202) and a conveying roller (2013) which are sequentially arranged along the Y direction; A belt connecting mechanism (204) is located between the main unwinding roller (201) and the main winding roller (202), and the belt connecting mechanism (204) comprises two adsorption components (2044) movably arranged along the X direction; Wherein, each of the adsorption components (2044) has two adsorption stations arranged in sequence in the Y direction, each of the adsorption stations has a vacuum state for adsorbing the material belt and a vacuum-breaking state for releasing the material belt, and the X direction is arranged at an angle to the Y direction. 2. The system for preparing a copper-lithium composite sheet according to claim 1 is characterized in that the unwinding assembly (20) has a tape connection channel extending along the Y direction; the unwinding assembly (20) also includes a spare unwinding mechanism, along the X direction, the main unwinding mechanism and the spare unwinding mechanism are respectively located on both sides of the tape connection channel, and the spare unwinding mechanism includes a spare unwinding roller (203) and a spare winding roller (205) arranged at intervals along the Y direction; One of the two adsorption components (2044) is located between the main unwinding roller (201) and the main winding roller (202), and the other of the two adsorption components (2044) is located between the backup unwinding roller (203) and the backup winding roller (205). 3. The system for preparing a copper-lithium composite sheet according to claim 2, characterized in that the adsorption member (2044) is provided with a first chamber and a second chamber, and the first chamber and the second chamber are arranged at intervals along the Y direction; A plurality of first through holes (20441) and a plurality of second through holes (20442) are provided on one side of the adsorption member (2044) facing the belt connection channel, wherein the plurality of first through holes (20441) are connected to the first chamber, and the plurality of second through holes (20442) are connected to the second chamber. 4. The system for preparing copper-lithium composite sheets according to claim 3 is characterized in that a material strip cutting component (2046) is provided on one of the two adsorption components (2044), and the material strip cutting component (2046) is located between the first chamber and the second chamber, and the material strip cutting component (2046) is movably arranged along the X direction so that the material strip cutting component (2046) can extend into the strip connection channel. 5. The system for preparing a copper-lithium composite sheet according to any one of claims 2 to 4, characterized in that the belt connecting mechanism (204) further comprises a belt connecting component, and the belt connecting component comprises: Adhesive tape unwinding roller (2041); A first clamping jaw (2042); The second clamp (2047), along the Y direction, the main unwinding roller (201), the tape unwinding roller (2041), the first clamp (2042), the adsorption member (2044) and the second clamp (2047) are arranged in sequence, and the second clamp (2047) is movably arranged along the Y direction, and the second clamp (2047) has a clamping position close to the first clamp (2042) and a pulling-out position away from the first clamp (2042). 6. The system for preparing copper-lithium composite sheets according to claim 5 is characterized in that the connecting mechanism (204) includes two connecting components, and along the X direction, the two connecting components are respectively located on both sides of the connecting channel, and the two connecting components are respectively arranged corresponding to the two adsorption components (2044). 7. A system for preparing a copper-lithium composite sheet according to any one of claims 1 to 4, characterized in that the system for preparing a copper-lithium composite sheet also includes a composite component (30) and three unwinding components (20) arranged in parallel, and the copper strip (1031), the lithium strip (1032) and the diaphragm strip (1033) are respectively unwound by the three unwinding components (20) and then enter the composite component (30) for compounding to form a copper-lithium composite strip. 8. The system for preparing a copper-lithium composite sheet according to claim 7, characterized in that the composite component (30) comprises: Composite Roller (2012); The roller mechanism comprises a frame and a first roller (302) and a second roller (303) rotatably arranged on the frame, wherein a roller pressing channel is provided between the first roller (302) and the second roller (303), and the copper strip (1031), the lithium strip (1032) and the diaphragm strip (1033) are transported to the roller pressing channel via the composite roller (2012). 9. The system for preparing copper-lithium composite sheets according to claim 8 is characterized in that an oil storage cavity and an oil inlet pipe (304) connected to the oil storage cavity are provided on the first pressing roller (302) and/or the second pressing roller (303). 10. The system for preparing a copper-lithium composite sheet according to claim 8 is characterized in that the second pressing roller (303) is movably arranged relative to the first pressing roller (302) so that the second pressing roller (303) can approach or move away from the first pressing roller (302). 11. The system for preparing a copper-lithium composite sheet according to claim 8, characterized in that an adjustment roller (301) is provided between the composite roller (2012) and the pressing roller mechanism, and the adjustment roller (301) is movably arranged along the Y direction; And/or, a plurality of adjustment rollers (301) arranged in rows and columns are further provided downstream of the pressing roller mechanism, and each of the adjustment rollers (301) is movably arranged along the X direction. 12. The system for preparing copper-lithium composite sheets according to claim 7 is characterized in that the system for preparing copper-lithium composite sheets also includes a cutting component (402) and a transfer component (40), the cutting component (402) and the transfer component (40) are sequentially located downstream of the composite component (30), and the cutting component (402) is used to cut the copper-lithium composite strip into multiple copper-lithium composite sheets (103). 13. The system for preparing a copper-lithium composite sheet according to claim 12, characterized in that the transfer component (40) comprises: A transfer mechanism (404) having a conveying surface for conveying the copper-lithium composite sheet (103); A visual detection mechanism (403) having a detection end for detecting the size of the copper-lithium composite sheet (103), wherein the detection end is arranged toward the conveying surface; A sorting mechanism (405) having a sorting surface capable of receiving the copper-lithium composite sheet (103) transported by the transfer mechanism (404); A material receiving mechanism, wherein the sorting surface is arranged toward the material receiving mechanism, and the material receiving mechanism includes a first collecting structure (406), a second collecting structure (407), a first unloading structure (408) and a second unloading structure (409) which are arranged in sequence, and the sorting mechanism (405) is used to transport the plurality of copper-lithium composite sheets (103) to the first collecting structure (406), the second collecting structure (407), the first unloading structure (408) and the second unloading structure (409) respectively. 14. The system for preparing a copper-lithium composite sheet according to claim 13, characterized in that the sorting mechanism (405) is located above the material receiving mechanism, and the sorting mechanism (405) comprises: A plurality of drive rollers (4011); A belt (4010) is wound around a plurality of driving rollers (4011), the plurality of driving rollers (4011) are used to drive the belt (4010) to circulate, a plurality of adsorption holes are provided on the belt (4010), and the lower surface of the belt (4010) forms the sorting surface; The adsorption structure (4013) comprises a plurality of vacuum chambers which are independently arranged in sequence and a plurality of vents which are connected to the vacuum chambers, wherein the vents are located on a side of the vacuum chamber facing the sorting surface, and four of the plurality of vacuum chambers are respectively arranged corresponding to the first collecting structure (406), the second collecting structure (407), the first unloading structure (408) and the second unloading structure (409); A vacuum breaking component (40134) is used to break the vacuum in the vacuum chamber. The vacuum breaking component (40134) is provided on each of the four vacuum chambers respectively corresponding to the first collecting structure (406), the second collecting structure (407), the first unloading structure (408) and the second unloading structure (409). 15. The system for preparing a copper-lithium composite sheet according to claim 14, characterized in that the transfer assembly (40) further comprises a cleaning mechanism (4014), and the cleaning mechanism (4014) comprises: A dust collecting box, the dust collecting box comprising a box body (40143) and a vacuum pipeline (40132), the box body (40143) having a dust collecting cavity and an opening communicating with the dust collecting cavity, and the vacuum pipeline (40132) communicating with the dust collecting cavity; The brush roller (40141) is rotatably installed in the dust collecting chamber, and a portion of the brush roller (40141) protrudes from the box body (40143) and contacts the belt (4010).