CN217691262U

CN217691262U - Thermal composite lamination device and battery production line

Info

Publication number: CN217691262U
Application number: CN202221610643.4U
Authority: CN
Inventors: 金晶; 徐鑫
Original assignee: Sany Technology Equipment Co Ltd
Current assignee: Sany Technology Equipment Co Ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2022-10-28
Anticipated expiration: 2032-06-23

Abstract

The utility model provides a hot composite lamination device and battery production line, wherein, hot composite lamination device includes: the device comprises a first unwinding mechanism and a second unwinding mechanism, wherein the first unwinding mechanism comprises a negative electrode material belt unwinding mechanism and two diaphragm material belt unwinding mechanisms, and the second unwinding mechanism comprises a positive electrode material belt unwinding mechanism; the first heat compounding mechanism is arranged at the downstream position of the first unreeling mechanism; the first cutting mechanism is arranged at the downstream position of the second unwinding mechanism; the second thermal compound mechanism is arranged at the downstream positions of the first thermal compound mechanism and the first cutting mechanism; and the second cutting mechanism is arranged at the downstream position of the second thermal compound mechanism. When the structure is used for laminating, only the alignment degree of the composite unit and the positive plate needs to be ensured, so that the precision control difficulty is reduced. Meanwhile, the hot composite lamination device does not need to independently cut the cathode material belt and the diaphragm material belt, so that the production process is simplified.

Description

Thermal composite lamination device and battery production line

Technical Field

The utility model relates to a battery production facility technical field, concretely relates to thermal compound lamination device and battery production line.

Background

Lamination is one of the processes of battery production, in which a positive electrode sheet, a separator and a negative electrode sheet are sequentially stacked and a cell is formed after hot pressing. In the prior art, in order to prevent the edge contact short circuit of the positive electrode sheet and the negative electrode sheet, the dimensional relationship of the positive electrode sheet, the separator and the negative electrode sheet is generally set as follows: the diaphragm is the largest and plays a role in separating the positive plate from the negative plate; the area of the negative plate is smaller than that of the diaphragm; the area of the positive plate is smaller than that of the negative plate.

In the structure, the sizes of the positive plate, the diaphragm and the negative plate are different, so that the three plates need to be cut separately, and the process steps are complicated. Meanwhile, when lamination is carried out, the alignment degree of four materials (diaphragm-negative plate-diaphragm-positive plate) with three sizes needs to be ensured, so that the requirement on processing precision is high, and the equipment cost is high.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the battery lamination technology among the prior art that the technology is complicated, the high defect of required precision to a thermal compound lamination device and battery production line are provided.

In order to solve the above problem, the utility model provides a thermal compound lamination device, include: the device comprises a first unwinding mechanism and a second unwinding mechanism, wherein the first unwinding mechanism comprises a cathode material belt unwinding mechanism and two diaphragm material belt unwinding mechanisms; the first heat compounding mechanism is arranged at the downstream position of the first unreeling mechanism; the first cutting mechanism is arranged at the downstream position of the second unwinding mechanism; the second thermal compound mechanism is arranged at the downstream positions of the first thermal compound mechanism and the first cutting mechanism; and the second cutting mechanism is arranged at the downstream position of the second thermal compound mechanism.

Optionally, a first position detecting mechanism is provided downstream of the first cut-off mechanism.

Optionally, a scrap removal mechanism is provided downstream of the first cutting mechanism and downstream of the second cutting mechanism.

Optionally, a position adjusting mechanism is disposed downstream of the first cutting mechanism, and the position adjusting mechanism is adapted to adjust the position of the positive pole piece.

Optionally, the thermal lamination device further includes a conveyor belt, and the position adjustment mechanism includes an air-floating alignment structure disposed on the conveyor belt.

Optionally, a second position detection mechanism is arranged at the downstream of the cathode material belt unwinding mechanism.

Optionally, a glue coating mechanism is arranged at the downstream of the membrane material belt unreeling mechanism and the downstream of the first heat compounding mechanism.

Optionally, the first cutting mechanism is a die cutting mechanism and the second cutting mechanism is a roll cutting mechanism.

Optionally, the thermal composite lamination apparatus further comprises a take-up mechanism disposed downstream of the second severing mechanism.

The utility model also provides a battery production line, including foretell heat recombination lamination device.

The utility model has the advantages of it is following:

utilize the technical scheme of the utility model, hot composite lamination device is when the lamination, and first unwinding mechanism unreels negative pole material area and diaphragm material area to carry out the thermal recombination through first hot composite structure and obtain first composite material area. The second unwinding mechanism unwinds the positive electrode material belt, and a plurality of positive electrode plates are obtained after the first cutting mechanism cuts the positive electrode material belt. And then the second thermal compounding mechanism compounds the first compound material belt and the plurality of positive plates to obtain a second compound material belt, and the second cutting mechanism cuts the second compound material belt to obtain a compounding unit. The lamination process is completed by stacking the composite units. In the structure, the diaphragm material belt and the negative electrode material belt are subjected to thermal compounding, and the widths of the negative electrode piece and the diaphragm of the compounded unit are the same after cutting. Therefore, when lamination is carried out, only the alignment degree of the composite unit and the positive plate needs to be ensured, and the precision control difficulty is reduced. Meanwhile, the thermal composite lamination device does not need to cut the cathode material belt and the diaphragm material belt independently, so that the production process is simplified. Consequently the technical scheme of the utility model the battery lamination technology among the prior art in the technology complicated, the defect that the required precision is high has been solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 shows a schematic structural view of a thermal lamination device of the present invention;

fig. 2 shows a schematic diagram of a cell formed by post-lamination hot pressing of the thermal composite lamination assembly of fig. 1; and

fig. 3 shows a schematic front view of the cell in fig. 2.

Description of reference numerals:

10. a first unwinding mechanism; 11. a negative material belt unwinding mechanism; 12. the membrane material belt unwinding mechanism; 20. a second unwinding mechanism; 30. a first thermal compounding mechanism; 40. a first cutting mechanism; 50. a second thermal compounding mechanism; 60. a second cutting mechanism; 70. a first position detection mechanism; 80. a waste material removing mechanism; 90. a position adjustment mechanism; 100. a conveyor belt; 110. a second position detection mechanism; 120. a gluing mechanism; 130. a material receiving mechanism; 140. an electric core; 141. a negative plate; 142. a diaphragm; 143. and (4) a positive plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 3, the thermal lamination apparatus of the present embodiment includes a first unwinding mechanism 10, a second unwinding mechanism 20, a first thermal lamination mechanism 30, a first cutting mechanism 40, a second thermal lamination mechanism 50, and a second cutting mechanism 60. The first unwinding mechanism 10 includes a negative material tape unwinding mechanism 11 and two diaphragm material tape unwinding mechanisms 12, and the second unwinding mechanism 20 includes a positive material tape unwinding mechanism. The first thermal compounding mechanism 30 is disposed at a downstream position of the first unwinding mechanism 10. The first cutting mechanism 40 is disposed at a downstream position of the second unwinding mechanism 20. The second thermal compounding mechanism 50 is disposed at a position downstream of the first thermal compounding mechanism 30 and the first cutoff mechanism 40. The second shut-off mechanism 60 is disposed at a position downstream of the second thermal compounding mechanism 50.

By using the technical scheme of this embodiment, when the thermal lamination stacking device performs lamination, the first unwinding mechanism 10 unwinds the cathode material tape and the diaphragm material tape, and the first composite material tape is obtained by performing thermal lamination through the first thermal lamination mechanism 30. The second unwinding mechanism 20 unwinds the positive electrode material tape, and cuts the positive electrode material tape by the first cutting mechanism 40 to obtain a plurality of positive electrode tabs 143. The second thermal compounding mechanism 50 then compounds the first compound material tape and the plurality of positive plates 143 to obtain a second compound material tape, and the second cutting mechanism 60 cuts the second compound material tape to obtain a compound unit. The lamination process is completed by stacking the composite units. In the structure, the diaphragm material belt and the negative electrode material belt are thermally compounded, and the widths of the negative electrode sheet 141 and the diaphragm 142 of the compounded unit after cutting are the same. Therefore, when lamination is performed, only the alignment degree of the composite unit and the positive plate 143 needs to be ensured, and therefore the difficulty of precision control is reduced. Meanwhile, the hot composite lamination device does not need to independently cut the cathode material belt and the diaphragm material belt, so that the production process is simplified. Therefore, the technical scheme of the embodiment overcomes the defects of complex process and high precision requirement in the battery lamination process in the prior art.

It should be noted that the first unwinding mechanism 10 includes a cathode material tape unwinding mechanism 11, and two membrane material tape unwinding mechanisms 12. The cathode material belt unwinding mechanism 11 is located between the two membrane material belt unwinding mechanisms 12, so that the materials form a form of "membrane material belt-cathode material belt-membrane material belt".

The first thermal compounding mechanism 30 is configured to thermally compound the two layers of the membrane material strips and the one layer of the cathode material strip, and obtain a first compound material strip.

The second unwinding mechanism 20 includes an anode material tape unwinding mechanism, and is used for unwinding the anode material tape. The unreeled positive electrode material tape is cut by the first cutting mechanism 40 to obtain a plurality of positive electrode sheets 143.

Preferably, the cathode material tape unwinding mechanism 11, the two membrane material tape unwinding mechanisms 12, and the anode material tape unwinding mechanism are unwinding rotating shafts.

After the plurality of positive electrode sheets 143 are obtained by the first cutting mechanism 40, the plurality of positive electrode sheets 143 and the first composite material tape are thermally combined by the second thermal combining mechanism 50, and a second composite material tape is obtained. Further, a plurality of positive electrode sheets 143 are disposed at intervals on the first composite tape. Therefore, the second composite material tape includes two layers of separator material tapes, one layer of negative electrode material tape, and a plurality of positive plates 143 disposed at intervals outside the separator material tapes.

The second composite material tape is cut by the second cutting mechanism 60 (the cutting position is the gap between adjacent positive electrode sheets 143), and a plurality of composite units are obtained. As will be understood in conjunction with the above process flow, the composite unit is in the form of "positive electrode sheet 143-separator 142-negative electrode sheet 141-separator 142". As will be understood by those skilled in the art in conjunction with fig. 3, since the negative electrode material tape and the separator material tape are thermally combined and then cut directly, the negative electrode sheet 141 and the separator 142 are equal in width. Meanwhile, the size and width of the positive electrode tab 143 are slightly smaller than those of the negative electrode tab 141 and the separator 142, thereby preventing the occurrence of short circuit caused by contact between the edges of the positive electrode tab 143 and the negative electrode tab 141.

And (3) stacking the multiple composite units to complete lamination, and performing a hot pressing process after lamination to obtain the battery cell 140 structure shown in fig. 2.

As shown in fig. 1, in the present embodiment, a first position detecting mechanism 70 is provided downstream of the first cutting mechanism 40. Specifically, the first position detecting mechanism 70 is configured to detect the position of the cut positive electrode sheet 143, and if the first position detecting mechanism 70 detects that there is a deviation in the position of the positive electrode sheet 143, the first position detecting mechanism 70 sends a signal to the control system to perform the subsequent correction step.

Preferably, the first position detecting mechanism 70 is a CCD sensor.

As shown in fig. 1, in the present embodiment, a scrap removing mechanism 80 is provided downstream of the first cutting mechanism 40 and downstream of the second cutting mechanism 60.

Specifically, the scrap removal mechanism 80 downstream of the first cutting mechanism 40 is used to remove scrap generated by cutting the positive electrode material tape. And the scrap ejector mechanism 80 is located at a position downstream of the first position detection mechanism 70.

In addition, the anode material belt is conveyed through a conveyor belt after being unreeled, and the first cutting mechanism 40, the first position detection mechanism 70 and the waste material removing mechanism 80 at the downstream of the first cutting mechanism 40 are all arranged at the conveyor belt.

Further, the waste material removing mechanism 80 located at the downstream of the second cutting mechanism 60 is used for removing the waste material generated after the second composite material strip is cut.

Preferably, the waste removal mechanism 80 is a suction cup structure.

As shown in fig. 1, in the solution of the present embodiment, a position adjusting mechanism 90 is provided downstream of the first cutting mechanism 40, and the position adjusting mechanism 90 is adapted to adjust the position of the positive electrode sheet. Specifically, the position adjusting mechanism 90 can arrange the plurality of positive electrode sheets 143 at equal intervals, thereby ensuring the position accuracy of the plurality of positive electrode sheets 143 on the second composite tape.

Preferably, as shown in fig. 1, the thermal lamination device further includes a conveyor belt 100, and the position adjustment mechanism 90 includes an air-bearing alignment structure disposed on the conveyor belt 100. The air flotation alignment structure enables the plurality of positive plates 143 to be arranged on the conveyor belt 100 at equal intervals.

As shown in fig. 1, in the technical solution of this embodiment, a second position detecting mechanism 110 is disposed downstream of the negative material tape unwinding mechanism. The second position detection mechanism 110 can detect the unwinding position of the negative material belt, and if the second position detection mechanism 110 detects that the position of the negative material belt has deviation, the first position detection mechanism 70 sends a signal to the control system, and the control system adjusts the position and the rotating speed of the negative material belt unwinding mechanism 11.

As shown in fig. 1, in the solution of the present embodiment, a glue applying mechanism 120 is disposed downstream of the membrane tape unwinding mechanism 12 and downstream of the first heat compounding mechanism 30. Specifically, the glue coating mechanism 120 coats glue between the separator material tape and the cathode material tape, so that the separator material tape and the cathode material tape are heated and then combined together to form a first composite material tape. Meanwhile, the glue coating mechanism coats glue between the first composite material belt and the positive plate 143, so that the first composite material belt and the positive plate are combined together after being heated, and a second composite material belt is formed.

In some embodiments not shown, the thermal lamination device may also be provided without the glue coating mechanism 120, in which case, the separator 142 itself is a gel separator, and the glue layer on the surface of the heated separator 142 melts to be combined with the adjacent material (the negative electrode sheet 141 or the positive electrode sheet 143).

Preferably, the first cutting mechanism 40 is a die-cut configuration and the second cutting mechanism 60 is a roll-cut configuration. The die cutting structure comprises a die cutting knife, and the roll cutting structure comprises two oppositely arranged cutting rolls.

As shown in fig. 1, in the present embodiment, the thermal composite lamination apparatus further includes a receiving mechanism 130, and the receiving mechanism 130 is disposed downstream of the second cutting mechanism 60. Specifically, the cut composite units fall into the receiving mechanism 130, and the composite units are stacked in the receiving mechanism 130. Preferably, the receiving mechanism 130 is a receiving box with an opening at the lower part, and the width of the receiving box is the same as that of the compound units, so as to ensure that the adjacent compound units are aligned. Taking materials from the lower part of the material receiving box, and carrying out hot pressing on the stacked composite units through a subsequent process, thereby forming the battery cell 140 structure shown in fig. 2.

The embodiment also provides a battery production line, which comprises the thermal lamination device.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A thermal composite lamination device, comprising:

the device comprises a first unwinding mechanism (10) and a second unwinding mechanism (20), wherein the first unwinding mechanism (10) comprises a cathode material belt unwinding mechanism (11) and two diaphragm material belt unwinding mechanisms (12), and the second unwinding mechanism (20) comprises an anode material belt unwinding mechanism;

the first heat compounding mechanism (30) is arranged at the downstream position of the first unreeling mechanism (10);

the first cutting mechanism (40) is arranged at the downstream position of the second unwinding mechanism (20);

a second thermal compounding mechanism (50) provided at a position downstream of the first thermal compounding mechanism (30) and the first cutting mechanism (40);

and a second shut-off mechanism (60) disposed downstream of the second thermal compound mechanism (50).

2. Thermal lamination device according to claim 1, wherein downstream of the first severing means (40) there is provided a first position detection means (70).

3. Thermal lamination device according to claim 1, characterized in that downstream of said first severing means (40) and downstream of said second severing means (60) waste rejecting means (80) are provided.

4. The thermal lamination device according to claim 1, wherein a position adjustment mechanism (90) is provided downstream of the first severing mechanism (40), the position adjustment mechanism (90) being adapted to adjust the position of the positive pole pieces.

5. The thermal compounding lamination device of claim 4, further comprising a conveyor belt (100), wherein the position adjustment mechanism (90) comprises an air bearing alignment structure disposed on the conveyor belt (100).

6. The thermal lamination device according to any one of claims 1 to 5, wherein a second position detection mechanism (110) is disposed downstream of the cathode material tape unwinding mechanism.

7. A thermal lamination device according to any one of claims 1 to 5, wherein gluing means (120) are provided downstream of said membrane tape unwinding means (12) and downstream of said first thermal lamination means (30).

8. The thermal lamination device according to any one of claims 1 to 5, wherein the first severing mechanism (40) is a die cut structure and the second severing mechanism (60) is a roll cut structure.

9. A thermal composite lamination device according to any one of claims 1 to 5, further comprising a take-up mechanism (130), the take-up mechanism (130) being disposed downstream of the second severing mechanism (60).

10. A battery production line comprising a thermal lamination assembly according to any one of claims 1 to 9.