CN117001164A - A device for cutting pole pieces of energy storage devices based on multi-pass laser - Google Patents

Abstract

The embodiment of the application provides an energy storage device pole piece cutting device based on multi-pass laser. Comprising the following steps: the first laser cutting piece, the second laser cutting piece, the third laser cutting piece, the first transmission piece and the second transmission piece; the first laser cutting piece, the second laser cutting piece and the third laser cutting piece are arranged at intervals, the first transmission piece is positioned between the first laser cutting piece and the second laser cutting piece, and the second transmission piece is positioned between the second laser cutting piece and the third laser cutting piece; the first laser cutting piece is used for cutting the mother electrode plate along a first direction so as to cut the mother electrode plate into at least two electrode transition plates; the first transmission piece is used for transmitting the electrode transition piece to the second laser cutting piece; the second laser cutting piece is used for cutting the electrode transition piece along a second direction so as to cut the electrode transition piece into at least two electrode target pieces, and the second transmission piece is used for transmitting the electrode target pieces to the third laser cutting piece; the third laser cutting piece is used for cutting the electrode target sheet so that the electrode target sheet is cut into the tab.

Description

Energy storage device pole piece cutting device based on multipass laser

Technical Field

The application relates to the technical field of electrode slice cutting, in particular to an energy storage device electrode slice cutting device based on multipass laser.

Background

The energy storage devices such as lithium ion batteries, sodium ion batteries, super capacitors and the like have the excellent performances of high specific energy, high specific power, long cycle life, wide use working conditions and the like, and are widely used in the fields of portable electronic equipment, electric automobiles, electric bicycles, power station energy storage, smart power grids, aerospace, military national defense and the like. The production and manufacture of the energy storage device generally comprises the processes of pole piece manufacture, liquid injection encapsulation, formation, delivery and the like. The manufacturing of the electrode plates is a core key for limiting the performance of the energy storage device, and has important influence on the production and manufacturing yield, efficiency, consistency and comprehensive performance of the battery.

In the related art, when the electrode plate is cut, a cutting die is generally adopted for cutting, but the controllability of the size, the shape and the precision of the electrode plate is poor, and the continuous production is influenced by polishing and replacing the cutting die at regular intervals.

Disclosure of Invention

The embodiment of the application provides an energy storage device pole piece cutting device based on multi-pass laser, which aims at solving the problems that the controllability of the size, shape and precision of an electrode piece is poor, and the continuous production is influenced by polishing and replacing a cutting die periodically in the related art.

In order to solve the technical problems, the application is realized as follows:

the embodiment of the application provides an energy storage device pole piece cutting device based on multi-pass laser, which comprises: the first laser cutting piece, the second laser cutting piece, the third laser cutting piece, the first transmission piece and the second transmission piece;

the first laser cutting piece, the second laser cutting piece and the third laser cutting piece are arranged at intervals, the first transmission piece is positioned between the first laser cutting piece and the second laser cutting piece, and the second transmission piece is positioned between the second laser cutting piece and the third laser cutting piece;

the first laser cutting piece is used for cutting the mother electrode plate along a first direction so as to cut the mother electrode plate into at least two electrode transition plates; the first transmission piece is used for transmitting the electrode transition piece to the second laser cutting piece; the second laser cutting piece is used for cutting the electrode transition piece along a second direction so as to cut the electrode transition piece into at least two electrode target pieces, and the second transmission piece is used for transmitting the electrode target pieces to the third laser cutting piece; the third laser cutting piece is used for cutting the electrode target sheet so that the electrode target sheet is cut into electrode lugs to form an electrode sheet;

wherein the first direction is different from the second direction.

Optionally, the multi-pass laser-based energy storage device pole piece cutting device further comprises a film stacking device and an electrode forming device;

the electrode forming device comprises a forming table, wherein the forming table is used for placing the electrode plate;

the membrane stacking device comprises a membrane unreeling structure, a reciprocating baffle and a membrane mounting clamp, wherein a gap is formed in the middle of the baffle, the membrane unreeling structure is wound with a membrane, and the membrane unreeling structure is used for releasing the membrane according to a target speed so that the membrane passes through the gap and is transmitted to the forming table; the diaphragm mounting clamp is used for primarily fixing the diaphragm when the diaphragm is firstly contacted with the electrode plate;

wherein the separator and the electrode sheet form a target electrode.

Optionally, the energy storage device pole piece cutting device based on multi-pass laser further comprises a fourth laser cutting piece;

the fourth laser cutting member is used for cutting the diaphragm after the diaphragm and the electrode sheet form a target electrode.

Optionally, the multi-pass laser-based energy storage device pole piece cutting device further comprises a third transmission piece;

the third conveying member is used for conveying the electrode plate to the forming table.

Optionally, the third transfer element comprises a vacuum adsorption stage;

in the process of conveying the electrode plate to the forming table by the vacuum adsorption table, the electrode plate is adsorbed by the vacuum adsorption table and is moved to the forming table, and the electrode plate is placed by the vacuum adsorption table.

Optionally, the energy storage device pole piece cutting device based on multi-pass laser further comprises a fourth transmission piece;

the fourth transmission piece is used for transmitting the mother electrode sheet to the position of the first laser cutting piece so that the first laser cutting piece cuts the mother electrode sheet.

Optionally, the fourth conveying member includes opposite calender rollers with a gap therebetween for passing the mother electrode sheet;

a heating piece and a pressure control piece are arranged in the calendaring roller; the heating piece is used for heating the rolling roller, so that the rolling roller can roll the mother electrode sheet when the mother electrode sheet is conveyed; the pressure control member is used for adjusting the thickness of the mother electrode slice by adjusting the width of the gap.

Optionally, the number of the first laser cutting member, the second laser cutting member, the third laser cutting member, the first transmission member and the second transmission member is two;

the two first laser cutting pieces, the two second laser cutting pieces, the two third laser cutting pieces, the two first transmission pieces and the two second transmission pieces are all positioned on two opposite sides of the electrode forming device.

Optionally, the energy storage device pole piece cutting device based on the multipass laser further comprises a CCD detection piece;

the CCD detection piece is located between the first laser cutting piece and the second laser cutting piece, and the CCD detection piece is used for detecting the cutting quality of the first laser cutting piece for cutting the mother electrode piece.

Optionally, the multi-pass laser-based energy storage device pole piece cutting device further comprises a guide piece;

the guide member is matched with the second transmission member, and fixes the electrode target sheet in the process of transmitting the electrode target sheet by the second transmission member so that the third laser cutting member cuts the electrode target sheet.

In the embodiment of the application, since the first laser cutting member, the second laser cutting member and the third laser cutting member are arranged at intervals, the first transmission member is located between the first laser cutting member and the second laser cutting member, and the second transmission member is located between the second laser cutting member and the third laser cutting member, after the first laser cutting member cuts the mother electrode sheet along the first direction, the first transmission member can transmit at least two electrode transition sheets to the second laser cutting member, the second laser cutting member can cut the electrode transition sheets along the second direction, each electrode transition sheet is cut into at least two electrode target sheets, and then the second transmission member can transmit a plurality of electrode target sheets to the third laser cutting member, and the third laser cutting member can cut the electrode target sheets, and cut the electrode tabs on the electrode target sheets, thereby forming the electrode sheets. That is, in the embodiment of the application, by arranging the first laser cutting piece, the second laser cutting piece and the third laser cutting piece, the mother electrode plate can be cut for multiple times, and finally the electrode plate is formed, in the cutting process, the size, the shape and the precision of the mother electrode plate can be well controlled, and the regular grinding of a die is avoided.

Drawings

FIG. 1 shows a schematic diagram of an energy storage device pole piece cutting device based on multi-pass laser provided by an embodiment of the application;

fig. 2 is a schematic diagram of a third laser cutting member cutting a tab according to an embodiment of the present application;

FIG. 3 is a schematic view of a scan mother electrode sheet of a first laser cutting member according to an embodiment of the present application;

FIG. 4 shows a schematic diagram of a release diaphragm of a diaphragm unreeling structure provided by an embodiment of the present application;

fig. 5 shows a schematic diagram of a third transmission element according to an embodiment of the present application transmitting an electrical pole piece;

FIG. 6 is a schematic view of a separator and electrode plate stacked together according to an embodiment of the present application;

FIG. 7 is a schematic view of an electrode forming apparatus according to an embodiment of the present application;

fig. 8 shows a schematic diagram of a first laser cutting member cutting a mother electrode sheet according to an embodiment of the present application.

Reference numerals:

10: a first laser cutting member; 20: a second laser cutting member; 30: a third laser cutting member; 40: a first transmission member; 50: a second transmission member; 60: a film stacking device; 61: a diaphragm unreeling structure; 62: a baffle; 63: a diaphragm mounting clip; 70: an electrode forming device; 71: a forming table; 72: fixing the clamping jaw; 80: a fourth laser cutting member; 90: a third transmission member; 100: a fourth transmission member; 110: a guide; 120: a fifth transmission member; 611: a diaphragm; 001: a mother electrode sheet; 002: an electrode transition sheet; 003: an electrode target sheet; 004: electrode plate.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Referring to fig. 1, a schematic diagram of an energy storage device pole piece cutting device based on multi-pass laser according to an embodiment of the present application is shown; referring to fig. 2, a schematic diagram of a third laser cutting member cutting a tab according to an embodiment of the present application is shown; referring to fig. 3, a schematic diagram of a scan mother electrode slice of a first laser cutting member according to an embodiment of the present application is shown; referring to FIG. 4, a schematic diagram of a release diaphragm of a diaphragm unreeling structure is shown, provided by an embodiment of the present application; referring to fig. 5, a schematic diagram of a third transmission element for transmitting an electric pole piece according to an embodiment of the present application is shown; referring to fig. 6, a schematic diagram of stacking a separator and an electrode sheet according to an embodiment of the present application is shown; referring to fig. 7, a schematic diagram of an electrode forming apparatus according to an embodiment of the present application is shown; referring to fig. 8, a schematic diagram of a first laser cutting member cutting a mother electrode sheet according to an embodiment of the present application is shown. As shown in fig. 1 to 8, the multi-pass laser-based energy storage device pole piece cutting device includes: first laser cutting member 10, second laser cutting member 20, third laser cutting member 30, first transmission member 40, and second transmission member 50.

The first laser cutting member 10, the second laser cutting member 20 and the third laser cutting member 30 are arranged at intervals, the first transmission member 40 is positioned between the first laser cutting member 10 and the second laser cutting member 20, and the second transmission member 50 is positioned between the second laser cutting member 20 and the third laser cutting member 30; the first laser cutting member 10 is used for cutting the mother electrode sheet 001 in a first direction to cut the mother electrode sheet 001 into at least two electrode transition sheets 002; the first transfer member 40 is used for transferring the electrode transition piece 002 to the second laser cutting member 20; the second laser cutting member 20 is for cutting the electrode transition piece 002 in the second direction to cut the electrode transition piece 002 into at least two electrode target pieces 003, and the second transfer member 50 is for transferring the electrode target pieces 003 to the third laser cutting member 30; the third laser cutting member 30 is used for cutting the electrode target tab 003, so that the electrode target tab 003 is cut out to form an electrode tab 004; wherein the first direction is different from the second direction.

In the embodiment of the present application, since the first laser cutting member 10, the second laser cutting member 20 and the third laser cutting member 30 are disposed at intervals, the first transmission member 40 is located between the first laser cutting member 10 and the second laser cutting member 20, and the second transmission member 50 is located between the second laser cutting member 20 and the third laser cutting member 30, after the first laser cutting member 10 cuts the mother electrode tab 001 along the first direction, the first transmission member 40 may transmit at least two electrode transition tabs 002 to the second laser cutting member 20, the second laser cutting member 20 may cut the electrode transition tabs 002 along the second direction, each electrode transition tab 002 is cut into at least two electrode target tabs 003, after that, the second transmission member 50 may transmit a plurality of electrode target tabs 003 to the third laser cutting member 30, and the third laser cutting member may cut electrode target tabs 003 to form electrode tabs 003. That is, in the embodiment of the present application, by arranging the first laser cutting member 10, the second laser cutting member 20 and the third laser cutting member 30, the mother electrode sheet 001 can be cut for multiple times, and finally the electrode sheet 004 is formed, and in the cutting process, the size, shape and precision of the mother electrode sheet 001 can be well controlled, and regular grinding and die cutting are avoided.

In addition, in the embodiment of the present application, as shown in fig. 3, the first laser cutting member 10, the second laser cutting member 20 and the third laser cutting member 30 perform multi-pass cutting, so that the kerf of the mother electrode sheet 001 is smooth and flat, and the defects of wall-hanging beads, burrs and the like are fewer, and in the cutting process, the spatter is less, and the kerf quality is high.

It should be noted that, in the embodiment of the present application, each of the first laser cutting member 10, the second laser cutting member 20 and the third laser cutting member 30 may be a femto-second laser cutting member, and of course, the first laser cutting member 10, the second laser cutting member 20 and the third laser cutting member 30 may be other types of laser cutting members.

In addition, in the embodiment of the present application, the master electrode tab 001 includes a sheet-shaped current collector, on which an active material layer is disposed, and when the first laser cutting member 10 cuts the master electrode tab 001, the first laser cutting member 10 cuts the master electrode tab 001 multiple times along a first direction, and when cutting for the first time, the first laser cutting member 10 cuts the active material layer, that is, cuts the active material layer, so that the current collector at the kerf formed by the first cutting is exposed, and then the first laser cutting member 10 cuts the exposed current collector, so that the master electrode tab 001 can be completely cut. Wherein the current collector comprises aluminum foil or copper foil.

In addition, in the embodiment of the present application, when the first laser cutting member 10 cuts the mother electrode sheet 001, the mother electrode sheet 001 may be cut into at least two electrode transition sheets 002 along the first direction, that is, at different positions on the mother electrode sheet 001, and during the cutting, the first laser cutting member 10 cuts the mother electrode sheet 001 multiple times, that is, first cuts the active material layer and then cuts the current collector at each position of the mother electrode sheet 001.

For example, as shown in fig. 1, the first laser cutter 10 may cut the mother electrode sheet 001 in the line shown in the y direction in the drawing when cutting the mother electrode sheet 001.

In addition, in the embodiment of the present application, the second laser cutter 20 also cuts the active material layer on the current collector first and then cuts the current collector when the second laser cutter 20 cuts the electrode transition piece 002.

In addition, in the embodiment of the present application, the first direction may be perpendicular to the second direction, and in this case, the first direction may be the same as the extending direction of one side of the mother electrode sheet 001, for example, as shown in fig. 1, the mother electrode sheet 001 is cut in the y direction. After that, after the electrode transition piece 002 is cut in the second direction, the electrode target piece 003 is formed in a more regular shape. For example, as shown in fig. 1, the electrode transition piece 002 is cut in the x-direction to form a square electrode target piece 003.

In addition, in the embodiment of the present application, the first transmission member 40 may be opposite first rollers, a gap is formed between the opposite first rollers, after the first laser cutting member 10 cuts the mother electrode sheet 001, the opposite first rollers may obtain the mother electrode sheet 001 after cutting, that is, may obtain the electrode transition sheet 002, and the electrode transition sheet 002 may move in the gap. When the opposite first rollers rotate, the electrode transition piece 002 is provided with a pulling force, so that the electrode transition piece 002 moves in the gap between the opposite first rollers. Wherein, can be provided with pressure device in the first running roller, pressure device provides pressure for first running roller is when transmitting electrode transition piece 002, makes electrode transition piece 002 have certain tension.

In addition, in the embodiment of the present application, the second conveying member 50 may be a second opposing roller, and a gap is formed between the second opposing rollers, after the second laser cutting member 20 cuts the electrode transition piece 002, the second opposing roller may obtain the electrode transition piece 002 after cutting, that is, may obtain the electrode target piece 003, and the electrode target piece 003 may move in the gap. Wherein, when the opposite second rollers rotate, the opposite second rollers provide a pulling force to the electrode target 003, so that the electrode target 003 moves in the gap between the opposite second rollers. The second transmission member 50 may include a plurality of sets of opposite second rollers, where the number of each set of opposite second rollers is two, and at this time, one set of second rollers closest to the second laser cutting member 20 may obtain the electrode target tab 003, then the other sets of second rollers may transmit the electrode target tab 003, or another set of second rollers adjacent to the set of second rollers closest to the second laser cutting member 20 may fix the electrode target tab 003, so that the third laser cutting member 30 may cut the electrode target tab 003, i.e. cut a tab on the electrode target tab 003 to form the electrode tab 004.

For example, as shown in fig. 1, the second transmission member 50 includes two sets of opposite second rollers, one set of second rollers is close to the second laser cutting member 20, the other set of second rollers is far away from the second laser cutting member 20, after the first laser cutting member 10 cuts the electrode transition piece 002, the set of second rollers close to the second laser cutting member 20 can obtain the electrode transition piece 002, the set of second rollers far away from the second laser cutting member 20 can fix the electrode transition piece 002, and the third laser cutting member 30 can cut the electrode target piece 003, i.e. cut the tab on the electrode target piece 003, thereby forming the electrode piece 004. It should be noted that, the set of second rollers far away from the second laser cutting member 20 may rotate at a slower speed, so that the electrode transition piece 002 moves slower, which is equivalent to fixing the electrode transition piece 002, so that the third laser cutting member 30 cuts the electrode transition piece 002.

Additionally, in some embodiments, as shown in fig. 1, the multi-pass laser-based energy storage device pole piece cutting apparatus may further include a guide 110. The guide 110 is engaged with the second transfer member 50, and fixes the electrode target 003 during transfer of the electrode target 003 by the second transfer member 50 so that the third laser cutter 30 cuts the electrode target 003.

When the guide member 110 is matched with the second transmission member 50, that is, during the process of transmitting the electrode target tab 003 by the second transmission member 50, a portion of the electrode target tab 003 is embedded in the guide member 110 and moves along the guide member 110, so that the guide member 110 can play a role in fixing the electrode target tab 003, and the moving speed of the electrode target tab 003 is relatively low, so that the third laser cutting member 30 can cut the tab on the electrode target tab 003.

For example, as shown in fig. 2, the third laser cutter 30 may cut along the lines shown in the drawing to cut out the tab on the electrode target tab 003.

In addition, in some embodiments, as shown in fig. 1 and 7, the multi-pass laser-based energy storage device pole piece cutting apparatus may further include a lamination apparatus 60 and an electrode forming apparatus 70. The electrode molding apparatus 70 includes a molding stage 71, and the molding stage 71 is used for placing the electrode sheet 004. The membrane stacking device 60 comprises a membrane unreeling structure 61, a reciprocating baffle plate 62 and a membrane mounting clamp 63, wherein a gap is formed between the baffle plate 62, the membrane unreeling structure 61 is wound with a membrane 611, and the membrane unreeling structure 61 is used for releasing the membrane 611 according to a target speed so that the membrane 611 passes through the gap and is transmitted to the forming table 71; the diaphragm mounting clip 63 is used for primarily fixing the diaphragm 611 when the diaphragm 611 is primarily in contact with the electrode tab 004; wherein the membrane 611 forms a target electrode with the electrode sheet 004.

Since the reciprocating shutter 62 has a slit in between, after the separator 611 is released by the separator 611 unreeling device, the separator 611 can pass through the slit so that the separator 611 comes into contact with the electrode sheet 004 on the molding table 71, and then the separator 611 can be fixed on the molding table 71 by the separator mounting clip 63 so that the separator 611 forms a target electrode with the electrode sheet 004.

In which the shutter 62 reciprocates, the diaphragm 611 may be caused to reciprocate on the molding table 71, for example, as shown in fig. 6, the diaphragm 611 may be formed in an S-shape on the molding table 71 due to the reciprocation of the shutter 62, thereby being laminated with the electrode sheet 004.

In addition, in the embodiment of the present application, as shown in fig. 7, two sets of fixing claws 72 may be provided at opposite sides of the forming table 71, and the two sets of fixing claws 72 at each side may be alternately moved for stacking of the electrode sheets 004. After one set of holding jaws 72 on one side completes the gripping, the other set of holding jaws 72 may be swung open to complete the alternate gripping action to grip and secure electrode sheet 004. When one set of fixing claws 72 is swung open, the other side fixing claw 72 is in a gripping state, so that the two sets of fixing claws 72 alternately move to grip and fix the electrode tab 004. Wherein, the fixed clamping jaw 72 can be coated with a protective film, for example, the fixed clamping jaw 72 is coated with polyoxymethylene, so that the fixed clamping jaw 72 can be prevented from damaging the electrode sheet 004 when the fixed clamping jaw 72 is contacted with the electrode sheet 004.

It should be noted that, the diaphragm unreeling structure 61 may include a motor and a winding roller, the diaphragm 611 may be wound on the winding roller, the winding roller is connected with the motor, the motor drives the winding roller to rotate, and the diaphragm 611 may release the diaphragm 611. Wherein the rotational speed of the motor may be controlled such that the motor drives the winding roller to rotate at a target speed, such that the winding roller may release the membrane 611 at the target speed.

In addition, in the embodiment of the present application, after the diaphragm 611 passes through the baffle 62 having the slit, the diaphragm 611 forms an angle with the forming table 71, so that the electrode sheet 004 can be conveniently placed on the forming table 71, and the diaphragm 611 and the electrode sheet 004 can be conveniently assembled.

Additionally, in some embodiments, as shown in fig. 1, the multi-pass laser-based energy storage device pole piece cutting apparatus may further include a fourth laser cutter 80. The fourth laser cutter 80 is used to cut the membrane 611 after the membrane 611 and the electrode tab 004 form the target electrode.

When the multi-pass laser-based energy storage device pole piece cutting device comprises the fourth laser cutting member 80, at this time, after the membrane 611 is aligned and overlapped with the electrode piece 004, the fourth laser cutting member 80 can cut off the membrane 611, so that the membrane mounting clamp 63 clamps the membrane 611 on one side of the forming table 71, and the first fixing of the membrane 611 can be completed under the action of the fixing clamping jaw 72 on the forming table 71. That is, by providing the fourth laser cutting member 80, it is possible to facilitate the initial fixation of the membrane 611 on the molding table 71, thereby facilitating the formation of the target electrode by the membrane 611 and the electrode sheet 004.

It should be noted that the type of the fourth laser cutting member 80 may be the same as the type of the first laser cutting member 10, that is, the fourth laser cutting member 80 may be a femto-second laser cutter.

Additionally, in some embodiments, as shown in fig. 1, the multi-pass laser-based energy storage device pole piece cutting apparatus may further include a third transfer member 90. The third transfer member 90 is used to transport the electrode sheet 004 onto the forming table 71.

When the multi-pass laser-based energy storage device pole piece cutting device comprises the third transmission member 90, after the electrode piece 004 is cut by the third laser cutting member 30, the electrode piece 004 can be transported to the forming table 71 by the third transmission member 90, so that the forming table 71 can form the electrode piece 004 and the diaphragm 611 to form the target electrode. That is, by providing the third transfer member 90, the formation of the target electrode can be facilitated.

Additionally, in some embodiments, the third transfer element 90 may include a vacuum chuck table. In the process that the vacuum adsorption table transmits the electrode sheet 004 to the forming table 71, the vacuum adsorption table adsorbs the electrode sheet 004 and moves the electrode sheet 004 to the forming table 71, and the vacuum adsorption table places the electrode sheet 004.

When the third transfer member 90 includes the vacuum adsorption stage, at this time, when the vacuum adsorption stage is required to transfer the electrode sheet 004, the vacuum adsorption stage may generate an adsorption force so that the vacuum adsorption stage may adsorb the electrode sheet 004, and when the vacuum adsorption stage transfers the electrode sheet 004 to the position of the forming stage 71, the vacuum adsorption stage may stop generating an adsorption force so that the electrode sheet 004 may be separated from the vacuum adsorption stage. That is, by providing the third transfer member 90 as a vacuum suction stage, the electrode sheet 004 can be transferred to the molding stage 71 more accurately.

The vacuum adsorption table is provided with an adsorption surface, a plurality of through holes are formed in the adsorption surface, a vacuumizing device is arranged in the vacuum adsorption table, and when the vacuum adsorption table needs to transmit the electrode sheet 004, the vacuumizing device operates and is in an air extraction state, so that the vacuum adsorption table generates adsorption force and can adsorb the electrode sheet 004. When the vacuum adsorption table conveys the electrode sheet 004 to the position of the forming table 71, the vacuumizing device is in an air blowing state or a closing state, when the vacuum adsorption table is in the air blowing state, the electrode sheet 004 can be separated from the vacuum adsorption table through air flow, and when the vacuum adsorption table is in the closing state, the electrode sheet 004 can be separated from the vacuum adsorption table through self gravity.

In addition, in the embodiment of the present application, when the third conveying member 90 includes a vacuum adsorption stage, at this time, the energy storage device pole piece cutting apparatus based on the multi-pass laser may further include a fifth conveying member 120, where the fifth conveying member 120 includes opposite third rollers, and a gap is formed between the opposite third rollers, so that the opposite third rollers can convey the electrode sheet 004 to the vacuum adsorption stage. Wherein, can set up the heating element in the third running roller, the heating element can heat the third running roller to when third running roller transmitted electrode slice 004, the calendering effect of third running roller to electrode slice 004 is better. In addition, a pressure piece can be arranged in the third roller, and the pressure piece transmits pressure to the third roller, so that a gap between the third roller and the third roller is adjusted, and the thickness of the electrode plate 004 can be adjusted when the third roller transmits the electrode plate 004.

In addition, in the embodiment of the present application, the molding table 71 may reciprocate in opposite directions, so that when the membrane 611 is moved to the position of the molding table 71, the movement of the molding table 71 may adjust the angle between the membrane 611 and the molding table 71, so that the vacuum adsorption table may place the adsorbed electrode sheet 004 on the membrane 611, and when the molding table 71 is moved to another position, the vacuum adsorption table transfers another electrode sheet 004 onto the membrane 611. In addition, the molding stage 71 is reciprocally moved in opposite directions, and at this time, the molding stage 71 may be fitted with a vacuum suction stage so that the vacuum suction stage may place the electrode sheet 004 on the molding stage 71 at a set frequency.

Additionally, in some embodiments, as shown in fig. 1, the multi-pass laser-based energy storage device pole piece cutting apparatus may further include a fourth transmission 100. The fourth transfer member 100 is used to transfer the mother electrode sheet 001 to the position of the first laser cutting member 10 so that the first laser cutting member 10 cuts the mother electrode sheet 001.

When the energy storage device pole piece cutting device based on multi-pass laser comprises the fourth transmission piece 100, at this time, the mother electrode piece 001 can be transmitted to the position of the first laser cutting piece 10 through the fourth transmission piece 100, so that the first laser cutting piece 10 can cut the mother electrode piece 001, the follow-up first transmission piece 40 and the second laser cutting piece 20 can conveniently perform corresponding actions, and a target electrode can be conveniently formed. That is, by providing the fourth transfer member 100, the transfer of the mother electrode sheet 001 can be facilitated, and the formation of the mother electrode sheet 001 can be facilitated.

Additionally, in some embodiments, the fourth transfer member 100 may include opposing calender rolls with a gap therebetween for passing the parent electrode sheet 001 therethrough. A heating piece and a pressure control piece are arranged in the calendaring roller; the heating piece is used for heating the rolling roller, so that the rolling roller can enable the mother electrode sheet 001 to be rolled when the mother electrode sheet 001 is conveyed; the pressure control member is used to adjust the thickness of the mother electrode sheet 001 by adjusting the width of the gap.

When the fifth transfer member 120 includes opposite calender rolls with a gap therebetween, the opposite calender rolls can transfer the mother electrode sheet 001 to the vacuum suction stage. Wherein, can set up the heating element in the calendering running roller, the heating element can heat the calendering running roller to when the female electrode slice 001 of calendering running roller transmission, the calendering effect of calendering running roller to female electrode slice 001 is better. In addition, can set up the pressure spare in the calendering running roller, pressure spare transmits pressure to the calendering running roller to adjust the clearance between the relative calendering running roller, make the calendering running roller when transmitting the female electrode slice 001, can adjust the thickness of female electrode slice 001, thereby be favorable to forming the quality improvement of target electrode.

It should be noted that the fourth conveying member 100 may also be another device having a conveying function, for example, the fourth conveying member 100 is a manipulator, and the embodiment of the present application is not limited herein with respect to the specific type of the fourth conveying member 100.

In addition, in some embodiments, the number of the first laser cutting member 10, the second laser cutting member 20, the third laser cutting member 30, the first transmission member 40, and the second transmission member 50 may be two. The two first laser cutting members 10, the two second laser cutting members 20, the two third laser cutting members 30, the two first transfer members 40, and the two second transfer members 50 are located on opposite sides of the electrode forming apparatus 70.

Because in the process of actual use, the battery cell generally comprises a positive electrode plate 004 and a negative electrode plate 004, the positive electrode plate 004 and the negative electrode plate 004 are stacked, and a diaphragm 611 is arranged between the positive electrode plate 004 and the negative electrode plate 004, namely the positive electrode plate 004 and the negative electrode plate 004 are blocked by the diaphragm 611. In order to accelerate the forming effect of the electrode sheet 004, in the embodiment of the present application, two first laser cutting members 10, two second laser cutting members 20, two third laser cutting members 30, two first transmission members 40 and two second transmission members 50 are located at opposite sides of the electrode forming device 70, so that the mother electrode sheet 001 of the positive electrode can be cut by the first laser cutting member 10 at one side of the electrode forming device 70, and then transmitted by the first transmission member 40 until the electrode target sheet 003 of the positive electrode cut by the third laser cutting member 30 at the one side forms the electrode sheet 004 of the positive electrode. Similarly, the other side of the electrode forming device 70 cuts the negative electrode mother electrode sheet 001 through the first laser member, and then is transmitted through the first transmission member 40 until the third laser member cuts the negative electrode target sheet 003 at the other side to form the negative electrode sheet 004, then the positive electrode sheet 004 and the negative electrode sheet 004 can be placed on the electrode forming table 71, and the positive electrode sheet 004 and the negative electrode sheet 004 are stacked, and a diaphragm 611 is arranged between the positive electrode sheet 004 and the negative electrode sheet 004. That is, by setting the number of the first laser cutting members 10, the second laser cutting members 20, the third laser cutting members 30, the first transfer members 40, and the second transfer members 50 to two, and setting the number of the two first laser cutting members 10, the number of the two second laser cutting members 20, the number of the two third laser cutting members 30, the number of the two first transfer members 40, and the number of the two second transfer members 50 to two opposite sides of the electrode forming apparatus 70, it is possible to facilitate the forming of the battery cells on the electrode forming table 71.

The separator 611 may be first fixed to the electrode molding table 71, then the positive electrode sheet 004 may be placed, then the separator 611 may be placed again, then the negative electrode sheet 004 may be placed again, and then the positive electrode sheet 004, the separator 611, and the negative electrode sheet 004 may be placed in this order until the number of layers reaches a predetermined level, thereby forming the battery cell.

Additionally, in some embodiments, the multi-pass laser-based energy storage device pole piece cutting apparatus may also include a CCD detector (not shown). The CCD detecting member is located between the first laser cutting member 10 and the second laser cutting member 20, and is used for detecting the cutting quality of the first laser cutting member 10 for cutting the mother electrode sheet 001.

When the CCD detecting member is located between the first laser cutting member 10 and the second laser cutting member 20, after the first laser cutting member 10 cuts the mother electrode sheet 001, i.e., after the electrode transition is formed, the CCD detecting member can obtain the image of the electrode transition sheet 002, thereby determining the cutting quality of the mother electrode sheet 001 cut by the first laser cutting member 10 according to the image of the electrode transition sheet 002. If the cutting quality of the cut mother electrode sheet 001 meets the set cutting requirement, the cut mother electrode sheet 001 can be obtained by the first transmission member 40, so that the first transmission member 40 can transmit the cut mother electrode sheet 001, that is, the transmission electrode transition sheet 002. If the cutting quality of the cut mother electrode sheet 001 does not meet the set cutting requirement, the first transmission member 40 will not acquire the mother electrode sheet 001 after cutting, i.e. the first transmission member 40 will not transmit the electrode transition sheet 002.

It should be noted that, the energy storage device pole piece cutting device based on multi-pass laser may include a controller, the CCD detecting element and the first transmitting element 40 may be electrically connected to the controller, after the CCD detects and obtains the image of the first laser cutting element 10 cut the mother electrode pole piece 001, the controller may obtain the image, so as to determine the cutting quality according to the image, thereby determining whether the first transmitting element 40 transmits the cut mother electrode pole piece 001 according to the cutting quality, that is, determining whether the first transmitting element 40 transmits the electrode transition piece 002 according to the cutting quality.

It should be further noted that, when the multi-pass laser-based energy storage device pole piece cutting apparatus includes a controller, at this time, the first laser cutting member 10, the second laser cutting member 20, the third laser cutting member 30, the fourth laser cutting member 80, the first transmission member 40, the second transmission member 50, the third transmission member 90, and the fourth transmission member 100 may be electrically connected to the controller, so that the controller controls the devices, thereby achieving the purpose of automatically cutting the electrode pole piece 004. The electrode forming table 71 and the separator 611 stacking device may be electrically connected to a controller.

In addition, in the embodiment of the application, the multi-pass laser-based energy storage device pole piece cutting device can further comprise a conveying member, wherein the conveying member is matched with the forming table 71, and is used for conveying the target electrode formed on the forming table 71. That is, after the target electrode is molded on the molding table 71, the transporting member can transport the target electrode.

In the embodiment of the present application, since the first laser cutting member 10, the second laser cutting member 20 and the third laser cutting member 30 are disposed at intervals, the first transmission member 40 is located between the first laser cutting member 10 and the second laser cutting member 20, and the second transmission member 50 is located between the second laser cutting member 20 and the third laser cutting member 30, after the first laser cutting member 10 cuts the mother electrode tab 001 along the first direction, the first transmission member 40 may transmit at least two electrode transition tabs 002 to the second laser cutting member 20, the second laser cutting member 20 may cut the electrode transition tabs 002 along the second direction, each electrode transition tab 002 is cut into at least two electrode target tabs 003, after that, the second transmission member 50 may transmit a plurality of electrode target tabs 003 to the third laser cutting member 30, and the third laser cutting member may cut electrode target tabs 003 to form electrode tabs 003. That is, in the embodiment of the present application, by arranging the first laser cutting member 10, the second laser cutting member 20 and the third laser cutting member 30, the mother electrode sheet 001 can be cut for multiple times, and finally the electrode sheet 004 is formed, and in the cutting process, the size, shape and precision of the mother electrode sheet 001 can be well controlled, and regular grinding and die cutting are avoided.

It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

While alternative embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including alternative embodiments and all such alterations and modifications as fall within the scope of the embodiments of the application.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude that an additional identical element is present in an article or terminal device comprising the element.

While the foregoing has been described in some detail by way of illustration of the principles and embodiments of the application, and while in accordance with the principles and implementations of the application, those skilled in the art will readily recognize that the application is not limited thereto.

Claims (10)

1. Energy storage device pole piece cutting device based on multichannel laser, its characterized in that, energy storage device pole piece cutting device based on multichannel laser includes: the first laser cutting piece, the second laser cutting piece, the third laser cutting piece, the first transmission piece and the second transmission piece;

the first laser cutting piece, the second laser cutting piece and the third laser cutting piece are arranged at intervals, the first transmission piece is positioned between the first laser cutting piece and the second laser cutting piece, and the second transmission piece is positioned between the second laser cutting piece and the third laser cutting piece;

the first laser cutting piece is used for cutting the mother electrode plate along a first direction so as to cut the mother electrode plate into at least two electrode transition plates; the first transmission piece is used for transmitting the electrode transition piece to the second laser cutting piece; the second laser cutting piece is used for cutting the electrode transition piece along a second direction so as to cut the electrode transition piece into at least two electrode target pieces, and the second transmission piece is used for transmitting the electrode target pieces to the third laser cutting piece; the third laser cutting piece is used for cutting the electrode target sheet so that the electrode target sheet is cut into electrode lugs to form an electrode sheet;

wherein the first direction is different from the second direction.

2. The multi-pass laser-based energy storage device pole piece cutting device of claim 1, further comprising a film laminating device and an electrode forming device;

the electrode forming device comprises a forming table, wherein the forming table is used for placing the electrode plate;

the membrane stacking device comprises a membrane unreeling structure, a reciprocating baffle and a membrane mounting clamp, wherein a gap is formed in the middle of the baffle, the membrane unreeling structure is wound with a membrane, and the membrane unreeling structure is used for releasing the membrane according to a target speed so that the membrane passes through the gap and is transmitted to the forming table; the diaphragm mounting clamp is used for primarily fixing the diaphragm when the diaphragm is firstly contacted with the electrode plate;

wherein the separator and the electrode sheet form a target electrode.

3. The multi-pass laser based energy storage device pole piece cutting apparatus of claim 2, further comprising a fourth laser cutting member;

the fourth laser cutting member is used for cutting the diaphragm after the diaphragm and the electrode sheet form a target electrode.

4. The multi-pass laser based energy storage device pole piece cutting apparatus of claim 2, further comprising a third transmission member;

the third conveying member is used for conveying the electrode plate to the forming table.

5. The multi-pass laser based energy storage device pole piece cutting apparatus of claim 4, wherein the third transport comprises a vacuum adsorption stage;

in the process of conveying the electrode plate to the forming table by the vacuum adsorption table, the electrode plate is adsorbed by the vacuum adsorption table and is moved to the forming table, and the electrode plate is placed by the vacuum adsorption table.

6. The multi-pass laser based energy storage device pole piece cutting apparatus of claim 1, further comprising a fourth transmission member;

the fourth transmission piece is used for transmitting the mother electrode sheet to the position of the first laser cutting piece so that the first laser cutting piece cuts the mother electrode sheet.

7. The multi-pass laser based energy storage device pole piece cutting apparatus of claim 6, wherein the fourth transport member comprises opposing calender rollers with a gap therebetween for passing the parent electrode piece;

a heating piece and a pressure control piece are arranged in the calendaring roller; the heating piece is used for heating the rolling roller, so that the rolling roller can roll the mother electrode sheet when the mother electrode sheet is conveyed; the pressure control member is used for adjusting the thickness of the mother electrode slice by adjusting the width of the gap.

8. The multi-pass laser-based energy storage device pole piece cutting apparatus of claim 2, wherein the number of the first laser cutting member, the second laser cutting member, the third laser cutting member, the first transmission member, and the second transmission member is two;

the two first laser cutting pieces, the two second laser cutting pieces, the two third laser cutting pieces, the two first transmission pieces and the two second transmission pieces are all positioned on two opposite sides of the electrode forming device.

9. The multipass laser-based energy storage device pole piece cutting apparatus of any of claims 1-8, further comprising a CCD detector;

the CCD detection piece is located between the first laser cutting piece and the second laser cutting piece, and the CCD detection piece is used for detecting the cutting quality of the first laser cutting piece for cutting the mother electrode piece.

10. The multi-pass laser based energy storage device pole piece cutting apparatus of any one of claims 1-8, further comprising a guide;

the guide member is matched with the second transmission member, and fixes the electrode target sheet in the process of transmitting the electrode target sheet by the second transmission member so that the third laser cutting member cuts the electrode target sheet.