CN220742417U - Intermittent composite belt preparation device - Google Patents

Abstract

The utility model relates to the field of composite belt production, and discloses a preparation device of an intermittent composite belt. The device comprises a compression roller, a slitter and a slitting roller, wherein a composite station and a slitting station are sequentially arranged corresponding to the slitting roller, and the compression roller is arranged in the composite station in a matched manner with the slitting roller; the slitting roller comprises a roller body and a guide mechanism, wherein the guide mechanism comprises a guide piece and a first control piece, the guide piece is provided with a first position and a second position, the first position of the guide piece is positioned on the roller peripheral surface of the roller body, the second position of the guide piece is separated from the roller peripheral surface of the roller body, and the first control piece is used for switching between the first position and the second position; the slitter is arranged at the slitting station. The intermittent composite belt preparation device provided by the application utilizes the position switching of the guide piece to enable part of the second composite material belt not to be compounded with the first composite material belt, and then the intermittent composite belt is formed by slitting, so that the high-quality intermittent composite belt can be prepared.

Description

Intermittent composite belt preparation device

Technical Field

The utility model relates to the field of composite belt production, in particular to a preparation device of an intermittent composite belt.

Background

Metallic lithium has theoretically the highest energy density (3860 mAh/g) and low electrode potential (-3.04V Vs standard hydrogen electrode), and is very potential as a negative electrode material for next-generation high-energy batteries or solid-state batteries. When lithium metal is used as a negative electrode material for a solid-state battery, lithium metal is generally prepared into a lithium metal tape having a thickness of 5 to 50um, and the lithium metal tape is simultaneously combined with a copper foil. The metal lithium is taken as a cathode material to participate in electrochemical reaction, and the copper foil has the function similar to that of a liquid lithium ion battery current collector and is taken as the current collector to carry out electron transmission.

With the development of lithium battery technology, a large battery route is becoming a trend. How is a large-sized lithium copper composite pole piece prepared? The conventional process is to leave a blank copper foil in the width direction of the copper-lithium composite tape, cut it into pieces, and subsequently weld the tab to the reserved blank copper foil. The method is used for manufacturing a large battery, has higher requirements on the width of a lithium belt, and the width is required to reach 300mm or more according to the size of the battery.

And the difficulty of manufacturing a wide lithium band is high at present. One of the solutions is to make the lithium strip and the copper foil completely coincide in the width direction and leave a certain gap in the length direction when the metal lithium strip is compounded on the copper foil, so as to prepare the intermittent compound lithium copper composite strip. And during subsequent flaking, transversely cutting at the intermittent position, and welding the tab at the gap in the length direction. Thus, the large-size negative electrode plate meeting the use requirement of the large battery can be prepared.

The publication CN114597331a discloses a method for preparing a batch lithium strip. And (3) scraping partial metal lithium layer on the lithium foil PL by controlling intermittent up-and-down movement of the scraper to form an intermittent lithium foil PNL. There are some inherent limitations to this approach, which is to scrape the lithium metal by contact of the doctor blade with the lithium foil PL. If the contact force between the scraper and the lithium foil PL layer is large, the load layer is most likely to be damaged, and scratches and even belt breakage occur. Particularly, in the case of scraping the copper foil-loaded lithium tape, the thin copper foil is fragile, and the damage of the copper foil current collector is likely to cause the safety problem of the battery cell. If the contact force is small, lithium metal cannot be scraped clean. The intermittent lithium metal residue can also cause significant problems in later cell fabrication.

Another method of making a batch lithium strip is disclosed in the publication CN 216928627U. The method comprises intermittently coating release agent on copper foil, and rolling the lithium foil strip and copper foil together. Due to the action of the release agent, the lithium foil cannot be transferred to the copper foil at the place with the release agent after rolling, and the lithium foil can be transferred to the copper foil at the place without the release agent, so that an intermittent lithium copper composite belt is formed. One of the problems of this method is that the lithium foil at the edge of the intermittent position is separated by tearing, the reliability of tearing separation is not high, the edge of the lithium foil cannot be tidy and consistent, and even a large-area defect can be developed, which can also have a great influence on the subsequent manufacturing of the battery cell pole piece.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a preparation device of an intermittent composite belt, which effectively improves the quality of the intermittent composite belt.

The utility model discloses an intermittent composite belt preparation device which comprises a compression roller, a slitting device and a slitting roller, wherein a composite station and a slitting station are sequentially arranged corresponding to the slitting roller, and the compression roller is arranged in the composite station in a matched manner with the slitting roller;

the slitting roller comprises a roller body and a guide mechanism, wherein the guide mechanism comprises a guide piece and a first control piece, the guide piece is provided with a first position and a second position, the first position of the guide piece is positioned on the roller peripheral surface of the roller body, the second position of the guide piece is separated from the roller peripheral surface of the roller body, and the first control piece is used for switching between the first position and the second position;

the slitter is arranged at the slitting station.

Preferably, the guiding mechanism comprises a second control member for controlling the guiding member to be switched to a third position, a guiding groove is formed in the peripheral surface of the slitting roller, and the third position is located in the guiding groove.

Preferably, the guide is bar-shaped.

Preferably, the guiding mechanism comprises a guiding bracket arranged in the guiding groove, one side of the guiding piece is hinged with the guiding bracket, the first control piece is a first linear driving element, and two ends of the first linear driving element are respectively hinged with the guiding piece and the guiding bracket to drive the guiding piece to rotate so as to realize switching between a first position and a second position.

Preferably, the second control member is a second linear driving element, and two ends of the second linear driving element are respectively connected with the guide bracket and the guide groove to drive the guide member to realize switching of the third position.

Preferably, at least two guide grooves are uniformly formed in the peripheral surface of the slitting roller, and the guide mechanisms are respectively arranged in the guide grooves.

Preferably, the slitting roller is driven to rotate by a stepper motor or a servo motor, and each rotation angle is equal to 360 degrees divided by the number of the guiding grooves.

Preferably, the width of the guide groove 65 is 0.5cm to 2cm.

Preferably, the slitter is a laser slitter or a mechanical slitter.

Preferably, the intermittent composite tape preparation device further comprises a first composite tape conveying line, a load tape conveying line and an intermittent composite tape winding line, wherein the first composite tape unreeling line and the load tape unreeling line are intersected at a composite station of the compression roller and the slitting roller, and the intermittent composite tape winding line is arranged behind the slitting roller;

the first composite material belt unreeling line comprises a first composite material belt unreeling line;

the load belt conveying line comprises a load belt unreeling roller and a first floating roller which are sequentially arranged;

the intermittent composite belt winding line comprises a second floating roller and a winding roller which are sequentially arranged.

The beneficial effects of the utility model are as follows: the intermittent type formula composite tape preparation facilities of this application utilizes the position switching of guide, makes partial second combined material area not compound mutually with first combined material area, then forms intermittent type formula composite tape through cutting, can prepare high-quality intermittent type formula composite tape, and the device can prepare intermittent type formula cut composite material area in succession, steadily, and composite material area edge is neat, unanimous. The device not only can be used for directly preparing products with market demands such as copper-lithium intermittent composite belts, but also can be used for preparing intermittent transfer belts, and then products with market demands such as copper-lithium intermittent composite belts can be produced through the transfer belts.

Drawings

FIG. 1 is a schematic illustration of an intermittent composite belt;

FIG. 2 is a schematic view of a guide mechanism;

FIG. 3 is a schematic diagram of the core components of a batch composite tape manufacturing apparatus;

fig. 4 is an overall schematic view of a batch-type composite tape manufacturing apparatus.

Reference numerals: the second composite material strip unreeling roller 1, the first floating roller 2, the first composite material strip unreeling 3, the press roller 4, the slitter 5, the slitting roller 6, the guiding mechanism 60, the guiding piece 61, the guiding bracket 62, the first linear driving element 63, the second linear driving element 64, the guiding groove 65, the second floating roller 7, the wind-up roller 8, the intermittent composite material strip 9, the second composite material strip 91 and the first composite material strip 92.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the intermittent composite belt preparation device comprises a press roller 4, a slitter 5 and a slitting roller 6, wherein a composite station and a slitting station are sequentially arranged corresponding to the slitting roller 6, and the press roller 4 is arranged in the composite station in cooperation with the slitting roller 6;

the slitting roller 6 comprises a roller body and a guide mechanism 60, the guide mechanism 60 comprises a guide piece 61 and a first control piece, the guide piece 61 has a first position and a second position, the first position of the guide piece 61 is positioned on the roller peripheral surface of the roller body, and the second position of the guide piece 61 is separated from the roller peripheral surface of the roller body;

the slitter 5 is arranged at the slitting station.

The preparation method of the intermittent composite belt 9 by adopting the device comprises the following steps:

with the guide 61 in the second position, the second composite strip 91 is fed onto the roll circumference of the slitting roll 6;

controlling the guide 61 to switch to the first position with the first control member such that the guide 61 is located on the second composite strip 91;

rotating the slitting roller 6 to a compounding station, compounding the first composite material belt 92 with the second composite material belt 91 by rolling of the pressing roller 4 and the slitting roller 6;

continuing to rotate the slitting roller 6 to a slitting station, and cutting the first composite material belt 92 on the second composite material belt 91 into an intermittent structure by utilizing the corresponding guide piece 61 of the slitter 5 to obtain an intermittent composite belt 9;

after the cutting is completed, the guide 61 is controlled to switch to the second position by the first control member.

When the guide 61 is in the second position, the guide 61 is separated from the peripheral surface of the slitting roller 6, so that the second composite material strip 91 can be conveyed to the peripheral surface of the slitting roller 6, the guide 61 can be positioned on the second composite material strip 91 after being switched to the first position, and thus when the first composite material strip 92 and the second composite material strip 91 are combined, the first composite material strip 92 and the second composite material strip 91 at the position of the guide 61 are not combined together due to the action of the guide 61, thereby providing convenience for the subsequent cutting of the first composite material strip 92 by the slitter 5, and the intermittent composite material strip 9 is formed after the slitter 5 cuts the uncomplexed first composite material strip 92.

In order to solve the problem that the guide 61, if located on the roll circumference, affects the quality of the composite and only a thinner material can be selected as the guide 61, in a preferred embodiment of the present application the guide mechanism 60 comprises a second control member for controlling the guide 61 to switch to a third position, the roll circumference of the slitting roll 6 being provided with guide grooves 65, said third position being located in the guide grooves 65.

Before rotating the slitting roller 6 to the compounding station, the second control element is used for controlling the guide piece 61 to move to the third position so as to drive the corresponding second composite material belt 91 to enter the guide groove 65;

after the cutting is completed, the guide 61 is controlled to move to the first position by the second control, and then switched to the second position by the first control.

In this way, in the compounding process, the second control member is located in the guide groove 65, so that the compounding pressure can be avoided, only the second composite material belt 91 located on the peripheral surface of the roller is compounded with the first composite material, and in the cutting process, the second composite material belt 91 which does not participate in compounding in the guide groove 65 can be separated from the first composite material by a sufficient distance, so that the cutting of the first composite material is facilitated, and the intermittent structure can be formed only by cutting one part of the first composite material.

In the specific form of the guide 61, if the guide 61 is located on the roller peripheral surface during the compounding, the guide 61 is preferably in a sheet form, the curvature may be in conformity with the roller peripheral surface, and the guide 61 is preferably in a bar form for the position to be switched into the guide groove 65. This allows a better traction of the second composite strip 91 into the guide groove 65, preventing damage thereto.

The specific arrangement of the first control member and the second control member may take various forms, for example, the first control member and the second control member may be provided on the roll end surface, and even the first control member and the second control member may be driven by the same driving unit. As shown in fig. 2, in the preferred embodiment of the present application, the guide mechanism 60 includes a guide bracket 62 disposed in a guide groove 65, one side of the guide 61 is hinged to the guide bracket 62, the first control member is a first linear driving element 63, and two ends of the first linear driving element 63 are hinged to the guide 61 and the guide bracket 62 respectively to drive the guide 61 to rotate so as to switch between the first position and the second position. The guide 61 is rotated so that it rotates onto the roll periphery, i.e. in a first position, and out of the roll periphery, i.e. in a second position. The first position and the second position are not limited to a single option, and the guide 61 may be positioned on the second composite material strip 91 when in the first position, and may guide the second composite material strip 91 into the groove 65, and the guide 61 may be positioned so as to allow the second composite material strip 91 to be wound around the peripheral surface of the slitting roller 6 when in the first position. For example, in the embodiment of fig. 4, the first position of the guide 61 is perpendicular to the roll end surface and the second position is parallel to the roll end surface. Before point a, the second composite strip 91 is fed onto the roll circumference of the slitting roll 6, at which point a the guide 61 is switched to the first position pressing against the second composite strip 91, before point b the guide 61 is switched to the third position, the second composite strip 91 is pulled into the guide groove 65, at which point b the slitting is performed, at which point c the guide 61 is switched to the third position after the slitting is completed.

On the basis, in order to realize the third position switching of the guide piece 61, in the preferred embodiment of the application, the second control piece is a second linear driving element 64, and two ends of the second linear driving element 64 are respectively connected with the guide bracket 62 and the guide groove 65 to drive the guide piece 61 to realize the third position switching. The second linear driving element 64 is contracted, so that the guide bracket 62, the first linear driving element 63, and the guide 61 are moved in the roller center direction as a whole, and the guide 61 is brought to the third position, and the second linear driving element 64 is extended, so that the whole is moved in the direction away from the roller center. The first linear driving element 63 and the second linear driving element 64 may be electric push rods, air cylinders, hydraulic cylinders, etc., and air cylinders are most suitable.

Although the single guide groove 65 and the guide mechanism 60 can produce the intermittent composite tape 9, production efficiency is low, and for this reason, in the preferred embodiment of the present application, the roll peripheral surface of the slitting roll 6 is uniformly provided with at least two guide grooves 65, and the guide mechanism 60 is provided in each guide groove 65. It can be seen that each length of the first composite strip 92 in the intermittent composite strip 9 produced is the arc length between two adjacent guide grooves on the slitting roller 6 plus the width of the guide groove 65, the intermittent length being about twice the depth to which the second composite strip 91 is drawn into the guide groove 65. The length of each first composite strip 92 can be adjusted by adjusting the arc length between the guide grooves 65, and the intermittent length can be adjusted by adjusting the depth to which the second composite strip 91 is drawn into the guide grooves 65. The width of the guide groove 65 should be as small as possible, and preferably should be controlled to be 0.5cm to 2cm.

In order to facilitate the cooperation of the slitting roller 6 at the various stations, the slitting roller 6 is preferably driven in rotation by a stepper motor or a servo motor, each rotation being equal to 360 ° divided by the number of guiding grooves, each rotation producing a length of intermittent first composite material web, the rotation angle being precisely controllable by the stepper motor or the servo motor.

The slitter 5 can adopt the existing slitting equipment such as the laser slitter 5 or the mechanical slitter 5 such as blades, tool bits and the like, wherein the laser slitter 5 is optimal, the slitting acting force of the laser slitter 5 is relatively small, and the stability of the composite slitting operation can be ensured.

The intermittent type formula composite tape 9 preparation facilities of this application can also increase current unreel winding structure, cooperates controllers such as PLC, singlechip to carry out motion control, realizes continuous automated production. As shown in fig. 4, in a preferred embodiment of the present application, the intermittent composite tape 9 preparing apparatus further includes a first composite tape 92 conveying line, a second composite tape 91 conveying line, and an intermittent composite tape 9 winding line, where the first composite tape 92 unreel 3 line and the second composite tape 91 unreel line meet at a composite station of the press roll 4 and the slitting roll 6, and the intermittent composite tape 9 winding line is disposed after the slitting roll 6;

the first composite material strip 92 unreeling 3 line comprises a first composite material strip 92 unreeling 3;

the second composite material belt 91 conveying line comprises a second composite material belt 91 unreeling roller 1 and a first floating roller 2 which are sequentially arranged;

the intermittent composite belt 9 winding line comprises a second floating roller 7 and a winding roller 8 which are sequentially arranged.

The first composite tape 92 conveying line is used for unreeling and conveying of composite material, the second composite tape 91 conveying line is used for unreeling and conveying of the second composite tape 91, the intermittent composite tape 9 reeling line is used for conveying and reeling the produced intermittent composite tape 9, and the first dancer roll 2 is arranged to apply tension before compounding because the second composite tape 91 needs to be pulled like the guide groove 65, and the second dancer roll 7 is arranged to provide the required tension in the intermittent composite tape 9 reeling line because it needs to be leveled when reeling.

For the specific preparation object, if the method is directly used for preparing the intermittent lithium-copper composite belt, the first composite belt 92 is a lithium belt or an alloy lithium belt prepared by lithium and one or more of magnesium, zinc, tin, indium and the like, the second composite belt 91 is copper, and for the method of preparing the intermittent transfer belt and then preparing the intermittent lithium-copper composite belt, the first composite belt 92 can be a lithium belt or a lithium alloy belt, and the second composite belt 91 can be a plastic film such as a PE film, a PP film or a PET film. Of course, the batch composite tape preparation apparatus of the present application may also be used for batch composite of other materials.

Claims (10)

1. The intermittent composite belt preparation device is characterized by comprising a press roll (4), a slitting device (5) and a slitting roller (6), wherein a composite station and a slitting station are sequentially arranged corresponding to the slitting roller (6), and the press roll (4) is matched with the slitting roller (6) to be arranged at the composite station;

the slitting roller (6) comprises a roller body and a guide mechanism (60), the guide mechanism (60) comprises a guide piece (61) and a first control piece, the guide piece (61) has a first position and a second position, the first position of the guide piece (61) is positioned on the roller peripheral surface of the roller body, and the second position of the guide piece (61) is separated from the roller peripheral surface of the roller body;

the slitter (5) is arranged at the slitting station.

2. An intermittent composite tape preparation device according to claim 1, wherein the guide mechanism (60) comprises a second control member for controlling the guide member (61) to switch to a third position, the roll peripheral surface of the slitting roll (6) being provided with guide grooves (65), the third position being located within the guide grooves (65).

3. A batch composite strip preparation apparatus as claimed in claim 2 wherein the guide (61) is rod-shaped.

4. A device for preparing an intermittent composite tape according to claim 3, wherein the guide mechanism (60) comprises a guide bracket (62) arranged in the guide groove (65), one side of the guide member (61) is hinged to the guide bracket (62), the first control member is a first linear driving element (63), and two ends of the first linear driving element (63) are hinged to the guide member (61) and the guide bracket (62) respectively to drive the guide member (61) to rotate so as to realize the switching between the first position and the second position.

5. An intermittent composite tape preparing device according to claim 4, wherein the second control member is a second linear driving member (64), and both ends of the second linear driving member (64) are respectively connected with the guide bracket (62) and the guide groove (65) to drive the guide member (61) to realize the switching of the third position.

6. An intermittent composite tape preparing apparatus according to claim 2, wherein at least two guide grooves (65) are uniformly provided on the roller peripheral surface of the slitting roller (6), and the guide mechanisms (60) are provided in the respective guide grooves (65).

7. Intermittent composite tape preparation device according to claim 6, characterized in that the slitting roller (6) is driven in rotation by a stepper motor or a servo motor control, each rotation angle being equal to 360 ° divided by the number of guiding grooves.

8. An intermittent composite tape preparing device according to claim 2, wherein the width of the guide groove (65) is 0.5cm to 2cm.

9. A batch composite strip preparation apparatus as claimed in claim 1 wherein the slitter (5) is a laser slitter (5) or a mechanical slitter (5).

10. An intermittent composite tape preparing device according to any one of claims 1-9, further comprising a first composite tape (92) transporting line, a load tape (91) transporting line and an intermittent composite tape winding line, the first composite tape (92) unreeling (3) line and the load tape (91) unreeling line intersecting at a compounding station of the press roll (4) and the slitting roll (6), the intermittent composite tape winding line being disposed after the slitting roll (6);

the first composite material strip (92) unreeling (3) circuit comprises a first composite material strip (92) unreeling (3);

the load belt (91) conveying line comprises a load belt (91) unreeling roller (1) and a first floating roller (2) which are sequentially arranged;

the intermittent composite belt winding circuit comprises a second floating roller (7) and a winding roller (8) which are sequentially arranged.