CN211045614U - Lamination machine - Google Patents

Abstract

The utility model relates to the technical field of pole piece stacking, and provides a stacking machine, which comprises at least one stacking device, the stacking device includes a feeding device for moving a material belt and a forming device, and the forming device includes processing on the material belt. The punching tab die for the outgoing tab and the cutting die for cutting the material strip to form the pole piece; an electrolyte coating, and two active conductive coatings respectively arranged between each electrolyte coating and the current collector layer; wherein, the lamination machine further comprises a material splicing device, and the material splicing device comprises a lamination box, and the lamination box has A receiving trough for placing the electrode pieces and stacking a plurality of the placed electrode pieces. Compared with the prior art, the lamination machine simplifies the equipment and reduces the production cost; in addition, the pole pieces formed by the lamination device can be directly laminated in the lamination box, thereby saving the process and improving the production efficiency .

Description

Stacker

technical field

The utility model relates to the technical field of pole piece stacking, in particular to a stacking machine.

Background technique

At present, the existing lamination method mainly adopts zigzag lamination, that is, the diaphragms are stacked on the lamination platform in a "Z" shape, and at least two layers of the same polarity are spaced above the diaphragm for each layer of diaphragm. For the pole pieces, the polarities of the two adjacent layers of pole pieces are different, and after stacking N layers of diaphragms, a cell blank assembly is formed.

The traditional lamination equipment mainly includes a negative electrode stacking device, a diaphragm device and a positive electrode stacking device. The pole pieces are made by the unwinding mechanism, die-cutting tab and cutting mechanism of the negative electrode stacking device and the positive electrode stacking device. The "Z"-shaped diaphragm alternately stacks the positive and negative electrode sheets to form a "Z"-shaped lamination. However, due to the existence of the diaphragm, it is easy to cause wrinkles in the diaphragm during the lamination process. As a result, the cell is in the process of charging and discharging. In addition, the efficiency of the laminated battery is low, which is significantly slower than that of the wound battery. In contrast, the manufacturing cost of the laminated battery is higher than that of the wound battery. It is much more expensive, which also limits the application of laminated batteries.

Utility model content

One of the objectives of the present utility model is to provide a lamination machine to solve the technical problem of excessively high production cost in the lamination equipment in the prior art.

To achieve the above object, the utility model provides the following technical solutions:

The utility model provides a lamination machine, which comprises at least one lamination device, the lamination device includes a feeding device for moving a material belt and a forming device, and the forming device includes a punching lug die for processing a pole lug on the material belt and a forming device. The cutting die is formed by cutting the material strip to form the pole piece, and the cutting die is located downstream of the punching lug die in the moving direction of the material strip; Two electrolyte coatings on the upper surface and the lower surface of the current collector layer, and two active conductive coatings respectively provided between each electrolyte coating and the current collector layer; wherein, the laminating machine further comprises a material splicing device, The material receiving device includes a lamination box, and the lamination box has a material receiving slot for placing the pole pieces and stacking a plurality of the inserted pole pieces.

The technical solution of the utility model has the following advantages: the lamination machine includes a lamination device and a material splicing device, the lamination device includes a feeding device and a forming device for moving the material belt, and the material splicing device includes a lamination with a material receiving slot. The cartridge, the material tape includes a base layer, and the base layer includes a current collector layer, two electrolyte coatings provided on the upper surface and the lower surface of the current collector layer, and two electrolyte coatings respectively provided between the two electrolyte coatings and the current collector layer. Active conductive coating, in this way, the electrolyte coating can be used to replace the diaphragm, and the corresponding diaphragm mechanism does not need to be additionally arranged when the pole pieces are stacked, which simplifies the equipment and reduces the production cost; in addition, the pole piece formed by the lamination device The lamination can be carried out directly in the lamination box, thereby saving the process and improving the production efficiency.

In one embodiment, the number of stacking devices is two, which are divided into a first stacking device and a second stacking device, and the first stacking device and the second stacking device are respectively arranged on the peripheral side of the material receiving device, The material receiving slot of the lamination box is used for the pole pieces formed by the first lamination device and the pole pieces formed by the second lamination device to be placed alternately; The middle base layer of the material belt is the negative electrode base layer or the positive electrode base layer, and the middle base layer of the material belt on the second lamination device is the positive electrode base layer or the negative electrode base layer; The two electrolyte coatings on the upper surface and the lower surface of the current collector layer, and the two positive active conductive coatings respectively disposed between each electrolyte coating and the positive current collector layer; Two electrolyte coatings are provided on the upper and lower surfaces of the negative electrode current collector layer, and two negative active conductive coatings are respectively provided between each electrolyte coating and the negative electrode current collector layer.

In one embodiment, the first lamination device and the second lamination device are arranged side by side, and are respectively located on opposite sides of the feeding device.

In one embodiment, the number of lamination devices is one; the number of base tapes in the material tape is set to two layers, the two layers of base tapes are stacked in the thickness direction, and one of the two layers of base tapes is a positive base tape, The other layer is a negative electrode base layer; the positive electrode base layer includes a positive electrode current collector layer, two electrolyte coatings respectively provided on the upper surface and the lower surface of the positive electrode current collector layer, and each electrolyte coating layer and the positive electrode current collector layer are respectively provided. The two positive active conductive coatings between them; the negative base strip includes a negative current collector layer, two electrolyte coatings respectively provided on the upper surface and the lower surface of the negative current collector layer, and each electrolyte coating and the negative electrode are respectively provided. Two negative active conductive coatings between the current collector layers.

In one embodiment, a conveying mechanism is provided between the lamination device and the material receiving device to receive the pole pieces and translate the pole pieces into the material receiving trough of the lamination box.

In one embodiment, the conveyor mechanism includes a conveyor belt and a conveyor drive assembly that rotates the conveyor belt.

In one embodiment, the feeding device includes a support shaft for mounting the web wound from the web and a shaft drive assembly for rotating the support shaft.

In one embodiment, the feeding device includes a material belt driving device, and the material belt driving device includes at least one group of pressing rollers and a roller driving assembly for rotating the at least one group of pressing rollers; the pressing roller group includes two pressing rollers, two There is a gap between the rollers for the feed belt to pass through.

In one embodiment, the stacking machine is provided with a material receiving area and a material unloading area, and the material receiving device further includes a translation mechanism for reciprocating the lamination box between the material receiving area and the material unloading area.

In one embodiment, the material receiving device further includes a lifting mechanism for lifting and lowering the lamination box.

Description of drawings

1 is a schematic front view of a lamination machine provided in Embodiment 1 of the present invention;

2 is a schematic top view of the lamination machine provided in Embodiment 1 of the present invention;

3 is a schematic structural diagram of a pole piece in a laminated state provided by Embodiment 1 of the present invention;

4 is a schematic front view of a lamination machine provided in Embodiment 2 of the present invention;

FIG. 5 is a schematic structural diagram of the material belt provided by the second embodiment of the present invention.

Description of main component symbols:

100 - lamination machine; 101 - receiving area; 102 - discharging area; 10 - material belt; 11a, 11b - base layer belt; 111a, 111b - current collector layer; 112a, 112b - active conductive coating; coating; 12-pole sheet; 12a-positive electrode sheet; 12b-negative electrode sheet; 20-stacking device; 201-first stacking device; 202-second stacking device; 30-feeding device; 31-support shaft; 32-belt drive device; 321-pressing roller group; 40-forming device; 41-punching tab die; 42-cutting die; 50-feeding device; 51-stack box; 52-feeding chute; -Conveyor mechanism; 61-Conveyor belt.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are some, but not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In order to make those skilled in the art better understand the technical solutions of the present invention, the implementation of the present invention will be described in detail below with reference to the specific drawings.

For the convenience of description, the "left", "right", "up" and "down" in the following are consistent with the left, right, up and down directions of the drawings themselves, but do not limit the structure of the present invention.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. "First", "second" and similar words used in the description of the patent application for this utility model and the claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Likewise, "a" or "an" and the like do not denote a quantitative limitation, but rather denote the presence of at least one.

Example 1

As shown in FIGS. 1 to 3 , a stacking machine 100 provided in this embodiment includes a stacking device 20 . The stacking device 20 includes a feeding device 30 for moving the material belt 10 and a forming device 40 . The forming device 40 is included in the The punching lug die 41 for processing the pole lug on the material strip 10 and the cutting die 42 for cutting the material strip 10 to form the pole piece 12, the cutting die 42 is located downstream of the punching lug die 41 in the moving direction of the material strip 10; The tape 10 includes base tapes 11a, 11b, the base tapes 11a, 11b include current collector layers 111a, 111b, two electrolyte coatings 113 provided on the upper and lower surfaces of the current collector layers 111a, 111b, respectively, and Two active conductive coatings 112a, 112b between the electrolyte coating layers 113 and the current collector layers 111a, 111b; wherein, the stacking machine 100 further includes a splicing device 50, and the splicing device 50 includes a lamination box 51, which The chip box 51 has a receiving groove 52 for placing the electrode pieces 12 and stacking the plurality of placed electrode pieces 12 .

The above-mentioned laminating machine 100 includes a laminating device 20 and a feeding device 50 . The laminating device 20 includes a feeding device 30 for moving the material belt 10 and a forming device 40 , and the feeding device 50 includes a laminating device with a feeding slot 52 . The cartridge 51, the tape 10 includes base tapes 11a, 11b, the base tapes 11a, 11b include current collector layers 111a, 111b, two electrolyte coatings 113 provided on the upper and lower surfaces of the current collector layers 111a, 111b, respectively, and Two active conductive coatings 112a, 112b are provided between each electrolyte coating 113 and the current collector layers 111a, 111b, so that the electrolyte coating 113 can be used instead of the separator, and the pole pieces 12 do not need to be additionally added when they are stacked. The provision of the corresponding diaphragm mechanism simplifies the equipment and reduces the production cost; in addition, the pole pieces 12 formed by the lamination device 20 can be directly laminated in the lamination box 51, thereby saving the process and improving the production efficiency.

1 and 2, the lamination machine 100 of this embodiment includes a lamination device 20, the lamination device 20 includes a feeding device 30 and a forming device 40, and the forming device 40 includes a punching lug die 41 and a cutting die 42. The mold 42 is located downstream of the punching lug mold 41 in the moving direction of the material belt 10. In this embodiment, the number of lamination devices 20 is but not limited to two, and the two lamination devices 20 are divided into a first stack. The lamination device 201 and the second lamination device 202, the first lamination device 201 and the second lamination device 202 are respectively arranged on the peripheral side of the feeding device 50, and the feeding slot 52 of the lamination box 51 is used for the first lamination device. The pole pieces 12 formed by 201 and the pole pieces 12 formed by the second lamination device 202 are placed alternately. The structures of the first lamination device 201 and the second lamination device 202 are the same, and both include a feeding device 30 and a forming device. For the device 40, it is easy to understand that the first lamination device 201 and the second lamination device 202 form the pole pieces 12 at the same time, and the pole pieces 12 formed by the two are processed in the receiving slot 52 of the lamination box 51. The lamination process simplifies the lamination process and improves the lamination efficiency.

Referring to FIG. 3 , in this embodiment, the number of base layers 11a and 11b of the material strip 10 is set to, but not limited to, one layer. Two electrolyte coatings 113 on the upper and lower surfaces of 111b, and two active conductive coatings 112a, 112b respectively provided between each electrolyte coating 113 and the current collector layers 111a, 111b.

In an exemplary embodiment, the base tapes 11a, 11b may be positive base tapes 11a, the current collector layers 111a, 111b may be positive current collector layers 111a, and the active conductive coatings 112a, 112b may be positive active conductive coatings 112a. The positive electrode current collector may include at least one selected from, for example, aluminum, titanium, copper, and silver. The positive active conductive coating 112a may include a positive electrode material, a binder, and a conductive material. The positive electrode material may include at least one selected from, for example, nickel cobalt lithium manganate, lithium iron phosphate, and lithium manganate. The adhesive may include a polyvinylidene fluoride adhesive. The conductive material may include at least one selected from, for example, carbon black, graphite powder, and carbon nanotubes. The electrolyte coating 113 may include a solid electrolyte material and a binder. The solid electrolyte material may include at least one selected from, for example, oxide electrolytes and sulfide electrolytes. The binder may include an N-methylpyrrolidone binder.

In an exemplary embodiment, the base tapes 11a, 11b may be negative base tapes 11b, the current collector layers 111a, 111b may be negative current collector layers 111b, and the active conductive coatings 112a, 112b may be negative active conductive coatings 112b. The negative electrode current collector may include at least one selected from, for example, copper, stainless steel, nickel, aluminum, and titanium. The negative active conductive coating 112b may include a negative electrode material, a binder, and a conductive material. The negative electrode material may include at least one selected from, for example, graphite, silicon carbon, and metallic lithium. The adhesive may include a styrene-butadiene rubber adhesive. The conductive material may include at least one selected from, for example, carbon black, graphite powder, and carbon nanotubes. The electrolyte coating layer 113 included in the negative electrode base tape 11b may be substantially the same as that included in the positive active material layer.

Referring back to FIGS. 1 and 2 , in this embodiment, the number of material belts 10 is but not limited to two, and the two material belts 10 are respectively installed on two lamination devices 20 , and one of the material belts 10 has The base tape is set as the positive base tape 11a, and the base tape in the other strip 10 is set as the negative base tape 11b. It is easy to understand that the first lamination device 201 is installed with the positive base tape 11a or the negative base tape 11b. The second lamination device 202 is equipped with the material strip 10 set as the negative base layer 11b or the positive base strip 11a, and the positive electrode sheet 12a or the negative electrode sheet 12b and the second stack are processed by the first lamination device 201. The sheet device 202 processes the negative electrode sheets 12b or the positive electrode sheets 12a, and alternately drops them into the receiving grooves 52, thereby completing the stacking of the positive electrode sheets 12a and the negative electrode sheets 12b in the stacking box 51. It should be pointed out that, by disposing the electrolyte coating 113 on the outermost side of the active conductive coatings 112a and 112b, the electrolyte coating 113 can be used to replace the separator, that is, when the pole pieces 12 are superimposed, between the pole pieces 12 There is no need to provide additional diaphragms, thereby saving processes and production costs.

Please continue to refer to FIGS. 1 and 2 , in this embodiment, the first stacking device 201 and the second stacking device 202 are arranged side by side, and are located on opposite sides of the material receiving device 50 respectively. The first lamination device 201 and the second lamination device 202 are symmetrically arranged on the left and right sides of the material splicing device 50 (the left and right directions in the figure), and the moving direction of the material belt 10 in the first lamination device 201 is the same as the second The moving directions of the webs 10 in the lamination device 202 are opposite.

In yet another embodiment, the first lamination device 201 and the second lamination device 202 may also be located on adjacent sides of the material splicing device 50, respectively, and the moving direction of the material tape 10 in the first lamination device 201 and the first The moving directions of the material belts 10 in the second lamination device 202 are perpendicular to each other.

1 and 2 , a conveying mechanism 60 is provided between the lamination device 20 and the material receiving device 50 to receive the pole pieces 12 and translate the pole pieces 12 into the material receiving slot 52 of the lamination box 51 . The conveying mechanism 60 is located below the material belt 10 . After the cutting die 42 cuts the material belt 10 to form the pole piece 12 , the pole piece 12 falls onto the conveying mechanism 60 and is transported by the conveying mechanism 60 to the receiving chute 52 for translation. In this way, the cut pole pieces 12 can be smoothly moved to the vicinity of the notch of the receiving groove 52 and slowly fall into the receiving groove 52 .

In this embodiment, the conveying mechanism 60 includes a conveying belt 61 and a conveying drive assembly (not shown) for rotating the conveying belt 61. The conveying drive assembly is but not limited to a motor drive assembly, and the outer surface of the conveying belt 61 is used to carry pole piece 12.

In yet another embodiment, the conveying mechanism may comprise a plurality of rollers arranged side by side.

1 and 2 , in this embodiment, the feeding device 30 includes a support shaft 31 for installing the coil material wound by the material tape 10 and a shaft drive assembly for rotating the support shaft 31. The support shaft 31 is but not limited to For the inflatable shaft, the shaft drive assembly is but not limited to a motor drive assembly (not shown in the figure), and the coil material wound by the material belt 10 is supported on the inflatable shaft for loading and unloading of the coil material.

1 and 2, in this embodiment, the feeding device 30 further includes a material belt driving device 32, and the material belt driving device 32 includes a pressing roller group 321 and a roller driving assembly (not shown) for rotating the pressing roller group 321; The number of the pressing roller group 321 is but not limited to one group, the roller driving component is but not limited to the motor driving component, the pressing roller group 321 includes two pressing rollers, and there is a gap between the two pressing rollers to feed the belt 10 through. It is easy to understand that the material belt driving device 32 can be used to pull the material belt 10 to move, so as to provide power for the movement of the material belt 10 .

Referring to FIGS. 1 and 2 , in this embodiment, the stacking machine 100 is provided with a receiving area 101 and a discharging area 102 , and the material receiving device 50 further includes a lamination box 51 between the receiving area 101 and the discharging area 102 . A translation mechanism (not shown) for reciprocating movement between the two, the material receiving area 101 corresponds to the blanking position of the conveying mechanism 60, and the translation mechanism can be any existing translation mechanism capable of realizing the movement of the lamination box 51 in the prior art. The material receiving device 50 also includes a lifting mechanism (not shown) for moving the stacking cassette 51 up and down. The lifting mechanism can be any existing lifting mechanism capable of realizing the movement of the stacking box 51 in the prior art. It can be understood that the stacking of the cells is sent to the stacking box 51 by the conveying mechanism 60 to complete the stacking of the cells. By setting the lifting mechanism, the stacking box 51 is driven to move up and down, and the translation mechanism is set to drive the stacking box 51 in the receiving area. 101 and the unloading area 102 move back and forth, so as to facilitate the loading and unloading of the lamination box 51, and operations such as gluing are performed after the stacked cells enter the unloading.

Embodiment 2

Only the differences from the first embodiment will be described in detail below with reference to FIGS. 4 and 5 .

Referring to FIG. 4 , in this embodiment, the number of lamination devices 20 is but not limited to one, the lamination device 20 includes a feeding device 30 and a forming device 40 , and the forming device 40 includes a punching lug die 41 and a cutting die 42 , The cutting die 42 is located downstream of the tab die 41 in the moving direction of the strip 10 .

Referring to FIG. 5, in this embodiment, the number of the base tapes 11a, 11b of the material tape 10 is set to but not limited to two layers, and the two layers of base tapes 11a, 11b are stacked in the thickness direction (up and down direction shown in the figure), A layer of base tapes 11a and 11b located at the bottom (under the illustration) can be the negative base tape 11b, which includes the electrolyte coating 113 and the negative active conductive coating sequentially arranged from bottom to top (the upper and lower directions of the illustration). 112b, negative current collector layer 111b, negative active conductive coating 112b, and electrolyte coating 113; a layer of base tape 11a, 11b located above (shown above) may be positive base tape 11a, which includes bottom-up ( The electrolyte coating 113 , the positive active conductive coating 112 a , the positive current collector layer 111 a , the positive active conductive coating 112 a and the electrolyte coating 113 are arranged in sequence in the up and down direction shown in the figure. It can be understood that, if at least two layers of base tapes 11a and 11b are compounded to make the above-mentioned material belt 10, the material belt 10 can be cut to form the pole piece 12 only by one lamination device 20, and then the pole piece 12 can be processed. In this way, the production cost can be greatly reduced, and the lamination efficiency can be improved.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (10)

1. A laminating machine comprises at least one laminating device, wherein the laminating device comprises a feeding device and a forming device, the feeding device and the forming device enable a material belt to move, the forming device comprises a tab punching die and a cutting die, the tab punching die is used for processing tabs on the material belt, the cutting die is used for cutting the material belt to form a pole piece, and the cutting die is located at the downstream of the tab punching die in the moving direction of the material belt; the material belt comprises at least one base layer belt, wherein the at least one base layer belt comprises a current collector layer, two electrolyte coatings respectively arranged on the upper surface and the lower surface of the current collector layer, and two active conductive coatings respectively arranged between each electrolyte coating and the current collector layer; the pole piece stacking device is characterized by further comprising a material receiving device, wherein the material receiving device comprises a pole piece stacking box, and the pole piece stacking box is provided with a material receiving groove for placing the pole pieces and enabling the placed pole pieces to be stacked.

2. The laminating machine according to claim 1, wherein the number of the laminating devices is two, and the laminating devices are divided into a first laminating device and a second laminating device, the first laminating device and the second laminating device are respectively arranged on the periphery of the material receiving device, and the material receiving groove of the laminating box is used for alternately placing the pole pieces formed by the first laminating device and the pole pieces formed by the second laminating device; the number of the base layer belts in the material belt is set to be one layer, the base layer belt in the material belt on the first lamination device is a negative electrode base layer belt or a positive electrode base layer belt, and the base layer belt in the material belt on the second lamination device is a positive electrode base layer belt or a negative electrode base layer belt;

the positive base layer comprises a positive current collector layer, two electrolyte coatings respectively arranged on the upper surface and the lower surface of the positive current collector layer, and two positive active conductive coatings respectively arranged between each electrolyte coating and the positive current collector layer; the negative base layer belt comprises a negative current collector layer, two electrolyte coatings arranged on the upper surface and the lower surface of the negative current collector layer, and two negative active conductive coatings respectively arranged between each electrolyte coating and the negative current collector layer.

3. The laminating machine of claim 2, wherein the first and second laminating devices are positioned side-by-side and on opposite sides of the receiving device.

4. The laminating machine according to claim 1, wherein the number of said laminating means is one; the number of the base layer belts in the material belt is set to be two, the two base layer belts are stacked in the thickness direction, one of the two base layer belts is a positive base layer belt, and the other base layer belt is a negative base layer belt; the positive base layer comprises a positive current collector layer, two electrolyte coatings respectively arranged on the upper surface and the lower surface of the positive current collector layer, and two positive active conductive coatings respectively arranged between each electrolyte coating and the positive current collector layer; the negative base layer belt comprises a negative current collector layer, two electrolyte coatings respectively arranged on the upper surface and the lower surface of the negative current collector layer, and two negative active conductive coatings respectively arranged between each electrolyte coating and the negative current collector layer.

5. A laminating machine according to any one of claims 1 to 4, wherein a conveying mechanism is provided between the laminating device and the receiving device to receive the pole pieces and translate them into receiving slots of the lamination cassette.

6. The lamination machine of claim 5, wherein the conveyor mechanism includes a conveyor belt and a conveyor drive assembly that rotates the conveyor belt.

7. A lamination machine according to any one of claims 1 to 4, wherein the feeding device comprises a support shaft for mounting a roll of material wound from a strip of material and a shaft drive assembly for rotating the support shaft.

8. A lamination machine according to any one of claims 1 to 4, wherein the feeding device comprises a tape drive comprising at least one set of nip rollers and a roller drive assembly for rotating at least one set of nip rollers; the pressing roller group comprises two pressing rollers, and a gap is reserved between the two pressing rollers so that the feeding belt can penetrate through the gap.

9. The laminating machine according to any one of claims 1 to 4, wherein the laminating machine is provided with a material receiving area and a material discharging area, and the material receiving device further comprises a translation mechanism for enabling the laminated box to move back and forth between the material receiving area and the material discharging area.

10. The laminating machine of any one of claims 1 to 4, wherein the receiving device further comprises a lifting mechanism for lifting the lamination box.

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