Composite pole piece rolling device

Abstract

The utility model discloses a composite pole piece rolling device, and belongs to the technical field of battery production. The composite pole piece rolling device comprises a pole piece unwinding mechanism, a pole lug cutting mechanism, a diaphragm unwinding mechanism, a rolling mechanism, a diaphragm winding mechanism and a pole piece winding mechanism which are arranged in sequence, wherein the tab cutting mechanism comprises a first cutting mechanism arranged above the tab position of the pole piece and a second cutting mechanism arranged below the tab position of the pole piece; the tab cutting mechanism is used for cutting a tab before the pole piece enters the rolling mechanism, and the tab formed after cutting can enable the whole pole piece to release stress, so that the phenomenon that the pole piece is difficult to stretch or cracks when passing through a roller by the rolling mechanism is avoided, and the problems that the pole piece cannot be stretched and is easy to crack in the rolling process are solved; therefore, the flatness of the formed composite pole piece can be ensured, and the rejection rate of the composite pole piece is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery production technical field especially relates to a kind of composite pole piece roll press device. BACKGROUND

[0002] In the battery production process, first diaphragm, pole piece and second diaphragm need to be heated and rolled by roll press mechanism, to be rolled and bonded to form composite pole piece;Then, the required lug is cut out on the formed composite pole piece.

[0003] However, in the heating and rolling process, since the pole piece is a whole piece of complete structure, it is easy to cause the pole piece to appear uneven stretching problem in the rolling process, affect the quality of the composite pole piece formed by rolling;And in the heating and rolling process, the lug position for cutting out lug on the pole piece is prone to cracking under the influence of high temperature, so that the required lug cannot be cut out on the composite pole piece subsequently, resulting in high scrap rate of composite pole piece and high battery production cost.

[0004] In view of the above problems, a composite pole piece roll press device is needed to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of composite pole piece roll press device, can guarantee the flatness of the composite pole piece formed by rolling, and can guarantee that the cut-out lug meets the demand, reduces the scrap rate of composite pole piece.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Composite pole piece roll press device, including being set gradually:

[0008] Pole piece unwinding mechanism, lug cutting mechanism, diaphragm unwinding mechanism, roll press mechanism, diaphragm winding mechanism and pole piece winding mechanism;

[0009] Among them, the lug cutting mechanism includes first cutting mechanism arranged above the lug position of pole piece and second cutting mechanism arranged below the lug position of pole piece.

[0010] As optional scheme, the first cutting mechanism includes:

[0011] First drive assembly, is set to the above of the pole piece;

[0012] First cutter is connected with the drive end of the first drive assembly, and the first cutter is correspondingly arranged above the lug position of the pole piece;

[0013] The second cutting mechanism includes:

[0014] Second drive assembly, is set to the below of the pole piece;

[0015] The second cutter is connected with the driving end of the second driving assembly, and the second cutter is arranged below the position of the tab of the pole piece.

[0016] As an optional solution, the first driving assembly comprises:

[0017] The fixed end of the first driving member is fixedly arranged above the pole piece;

[0018] The first connecting plate is arranged in parallel above the pole piece, the top end of the first connecting plate is connected with the driving end of the first driving member, the first cutter is connected with the bottom end of the first connecting plate, and the first driving member is used to drive the first connecting plate to move along the Z axis.

[0019] As an optional solution, the second driving assembly comprises:

[0020] The second driving member is located on one side of the pole piece;

[0021] The second connecting plate is fixedly arranged, the second connecting plate is arranged perpendicularly on one side of the pole piece, and a guide sliding groove extending along the Z axis is arranged on the second connecting plate;

[0022] The connecting rod is located below the pole piece, one end of the connecting rod is connected with the driving end of the second driving member, the other end of the connecting rod passes through the guide sliding groove and is connected with the second cutter, and the second driving member is used to drive the connecting rod to move along the Z axis in the guide sliding groove.

[0023] As an optional solution, the first cutter and the second cutter are of the same structure; the first cutter comprises:

[0024] Four sub-cutting blades are sequentially arranged to form a square frame, a square through hole is formed in the middle of the square frame, and the cut piece cut by the first cutter and the second cutter can pass through the square through hole.

[0025] As an optional solution, the tab cutting mechanism further comprises:

[0026] The collecting box is arranged below the second cutter in a spaced manner, and the collecting box is used to collect the cut piece.

[0027] As an optional solution, two tab cutting mechanisms are arranged, and the two tab cutting mechanisms are arranged on opposite sides of the pole piece in a direction perpendicular to the unwinding direction of the pole piece.

[0028] As an optional solution, the diaphragm unwinding mechanism comprises a first diaphragm unwinding mechanism and a second diaphragm unwinding mechanism;

[0029] The diaphragm winding mechanism comprises a first diaphragm winding mechanism and a second diaphragm winding mechanism.

[0030] The roller pressing mechanism comprises a first pressing roller, a second pressing roller and a heating member.

[0031] As an option, the composite tab rolling device further comprises:

[0032] The first tension buffering mechanism is arranged between the tab unwinding mechanism and the tab cutting mechanism.

[0033] The second tension buffering mechanism is arranged between the tab winding mechanism and the roller pressing mechanism.

[0034] As an option, the composite tab rolling device further comprises:

[0035] The first stretching mechanism is arranged between the tab cutting mechanism and the roller pressing mechanism.

[0036] The second stretching mechanism is arranged between the roller pressing mechanism and the second tension buffering mechanism.

[0037] The beneficial effects of the present application are as follows:

[0038] By unwinding the tab through the tab unwinding mechanism, the first cutting mechanism and the second cutting mechanism of the tab cutting mechanism are arranged downstream of the tab unwinding mechanism, the tab cutting mechanism, the diaphragm winding mechanism is arranged downstream of the tab cutting mechanism, and the roller pressing mechanism is arranged downstream of the diaphragm winding mechanism, so that the diaphragm winding mechanism unwinds the diaphragm, thereby the diaphragm and the tab can be rolled by the roller pressing mechanism to form a composite tab; the tab is no longer a whole piece of complete structure by pre-cutting the tab at the tab position on the tab through the tab cutting mechanism before the rolling operation, that is, there is a gap space formed when the tab is cut on the tab, so that the gap space can provide a containing allowance for the rolling of the tab, so as to ensure that the tab will not have a stretching difficulty problem in the subsequent rolling process, thereby ensuring the flatness of the composite tab formed by rolling, and in the process of heating and rolling, the gap space can absorb the influence of high temperature, so as to avoid the problem of cracking of the tab under the influence of high temperature, thereby reducing the scrap rate of the composite tab, and thereby saving the production cost of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a structure schematic view of a composite tab rolling device provided in the present application;

[0040] Figure 2 is an assembly structure schematic view between the tab and the tab cutting mechanism.

[0041] Explanation of reference numerals in the attached figures:

[0042] 10-Electrode; 101-Electrode tab; 102-Gap space; 20-First septum; 30-Second septum; 40-Composite electrode;

[0043] 1-Electrode unwinding mechanism;

[0044] 2-Electrode cutting mechanism; 21-First drive assembly; 211-First drive component; 212-First connecting plate; 22-First cutter; 221-Slitting blade; 222-Square through hole; 23-Second drive assembly; 231-Second drive component; 232-Second connecting plate; 2321-Guide groove; 233-Connecting rod; 24-Second cutter; 25-Collection box;

[0045] 3-First diaphragm unwinding mechanism; 4-Second diaphragm unwinding mechanism;

[0046] 5-Roller pressing mechanism; 51-First pressure roller; 52-Second pressure roller;

[0047] 6-First tension buffer mechanism; 7-Electrode winding mechanism; 8-First diaphragm winding mechanism; 9-Second diaphragm winding mechanism; 11-First stretching mechanism; 12-Second stretching mechanism; 13-Second tension buffer mechanism; 14-Guide roller. Detailed Implementation

[0048] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0049] Any feature disclosed in this specification, unless specifically stated otherwise, may be replaced by other equivalent or similar features. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features. Throughout this specification, the same reference numerals indicate the same elements.

[0050] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0051] This embodiment proposes a composite electrode rolling device, such as... Figure 1 As shown, the composite electrode rolling device can heat and roll the first separator 20, the electrode 10 and the second separator 30 to form a composite electrode 40, and can ensure the quality of the formed composite electrode 40, reduce the scrap rate of the composite electrode 40, thereby reducing the production cost of the battery.

[0052] Specifically, such asFigure 1 and Figure 2 As shown in the figure, the composite tab roll pressing device comprises, in sequence, a tab unwinding mechanism 1, a tab ear cutting mechanism 2, a diaphragm unwinding mechanism, a roll pressing mechanism 5, a diaphragm winding mechanism and a tab winding mechanism 7; wherein the tab 10 is wound on the tab unwinding mechanism 1, and the tab unwinding mechanism 1 is used for unwinding the tab 10; the tab ear cutting mechanism 2 is located downstream of the tab unwinding mechanism 1, and the tab ear cutting mechanism 2 comprises a first cutting mechanism arranged above the tab ear position of the tab 10 and a second cutting mechanism arranged below the tab ear position of the tab 10, so that the first cutting mechanism and the second cutting mechanism cooperate with each other to cut the required tab ear 101 at the tab ear position on the tab 10; the diaphragm unwinding mechanism is located downstream of the tab ear cutting mechanism 2, and the diaphragm unwinding mechanism is used for unwinding the diaphragm; the roll pressing mechanism 5 is located downstream of the diaphragm unwinding mechanism, and the roll pressing mechanism 5 is used for heating and rolling the diaphragm and the tab 10 to form the composite tab 40 described above; the diaphragm winding mechanism is used for winding the diaphragm; and the tab winding mechanism 7 is used for winding the composite tab 40 formed above. Among them, the tab unwinding mechanism 1 adopts the common unwinding roll structure in the prior art; the diaphragm winding mechanism and the tab winding mechanism 7 adopt the common winding roll structure in the prior art.

[0053] The composite tab roll pressing device in the embodiment adds the tab ear cutting mechanism 2 before the tab 10 enters the roll pressing mechanism 5, so that the tab ear 101 is cut on the tab 10 before entering the roll pressing mechanism 5; by unwinding the tab 10 through the tab unwinding mechanism 1, the tab ear cutting mechanism 2 is arranged downstream of the tab unwinding mechanism 1, the first cutting mechanism and the second cutting mechanism of the tab ear cutting mechanism 2 cooperate with each other to cut the required tab ear 101 at the tab ear position on the tab 10, and the diaphragm unwinding mechanism is arranged downstream of the tab ear cutting mechanism 2, and the roll pressing mechanism 5 is arranged downstream of the diaphragm unwinding mechanism, so that the diaphragm unwinding mechanism unwinds the diaphragm, so that the diaphragm and the tab 10 can be heated and rolled by the roll pressing mechanism 5 to form the composite tab 40 described above; by cutting the tab ear 101 at the tab ear position of the tab 10 in advance through the tab ear cutting mechanism 2 before the rolling operation, the tab 10 is no longer a whole piece of complete structure, that is, the tab 10 has a gap space 102 formed when the tab ear 101 is cut, so that the gap space 102 can provide a containing allowance for the rolling of the tab 10, so as to ensure that the tab 10 will not appear uneven stretching problem in the subsequent rolling process, thereby ensuring the flatness of the composite tab 40 formed by rolling; and during the heating and rolling process, the gap space 102 can absorb the influence of high temperature, so as to avoid the problem of cracking of the tab ear position on the tab 10 for cutting the tab ear 101 under the influence of high temperature, thereby ensuring that the cut tab ear 101 meets the requirements, reducing the scrap rate of the composite tab 40, and thereby saving the production cost of the battery.

[0054] Further, as shown in Figure 2 the first cutting mechanism includes a first driving assembly 21 and a first cutter 22; wherein the first driving assembly 21 is arranged above the pole piece 10, and the first driving assembly 21 is arranged corresponding to the position of the tab on the pole piece 10; the first cutter 22 is connected to the driving end of the first driving assembly 21, and the first cutter 22 is arranged above the position of the tab on the pole piece 10; wherein the first driving assembly 21 is used to drive the first cutter 22 to cut down the upper surface of the pole piece 10 along the Z-axis; at the same time, the second cutting mechanism includes a second driving assembly 23 and a second cutter 24; wherein the second driving assembly 23 is arranged on one side of the pole piece 10 and below the pole piece 10, and the second driving assembly 23 is arranged corresponding to the position of the tab on the pole piece 10; the second cutter 24 is connected to the driving end of the second driving assembly 23 and is arranged opposite to the first cutter 22, and the second cutter 24 is arranged below the position of the tab on the pole piece 10; wherein the second driving assembly 23 is used to drive the second cutter 24 to cut up the lower surface of the pole piece 10 along the Z-axis; so that the first cutter 22 and the second cutter 24 can cut off the cut piece of the pole piece 10 by mutual cooperation, and the part between the adjacent two cut pieces on the pole piece 10 forms the above-mentioned tab 101.

[0055] Specifically, as shown in Figure 2 the space after cutting off the cut piece on the pole piece 10 is the above-mentioned gap space 102, so as to provide accommodation allowance for the rolling of the pole piece 10 through the gap space 102, and to absorb the influence of high temperature during rolling through the gap space 102. Wherein, the gap space 102 can be specifically provided with a plurality of gap spaces, and here, the specific number and size of the gap space 102 are not limited.

[0056] Further, as shown in Figure 2 the first driving assembly 21 includes a first driving member 211 and a first connecting plate 212; wherein the fixed end of the first driving member 211 is fixedly arranged above the pole piece 10; the first connecting plate 212 is arranged in parallel above the pole piece 10, the top end of the first connecting plate 212 is connected to the driving end of the first driving member 211, and the first cutter 22 is connected to the bottom end of the first connecting plate 212; the first driving member 211 is used to drive the first connecting plate 212 to move along the Z-axis, so as to drive the first cutter 22 to move up and down along the Z-axis. Wherein, the first driving member 211 can be a linear cylinder.

[0057] Specifically, as shown in Figure 2As shown, the second driving assembly 23 comprises a second driving member 231, a second connecting plate 232 and a connecting rod 233; the second driving member 231 is located on one side of the pole piece 10; the second connecting plate 232 is fixedly arranged, and the second connecting plate 232 is vertically arranged on one side of the pole piece 10, and a guide sliding groove 2321 extending along the Z axis is arranged on the second connecting plate 232; the connecting rod 233 is located below the pole piece 10, one end of the connecting rod 233 is connected with the driving end of the second driving member 231, the other end of the connecting rod 233 passes through the guide sliding groove 2321 and is connected with the second cutter 24, and the second driving member 231 is used for driving the connecting rod 233 to move along the Z axis in the guide sliding groove 2321, so as to drive the second cutter 24 to move up and down along the Z axis. Specifically, the second driving member 231 can be a linear cylinder.

[0058] By fixing the fixed end of the first driving member 211 above the pole piece 10 and arranging the first connecting plate 212 parallel to the upper side of the pole piece 10, and by locating the second driving member 231 on one side of the pole piece 10 and arranging the second connecting plate 232 vertically on one side of the pole piece 10, the overall layout of the first driving assembly 21 and the second driving assembly 23 can be more reasonable and compact, the layout area occupied by the first driving assembly 21 and the second driving assembly 23 can be reduced, and the structural compactness of the entire composite pole piece rolling device can be ensured.

[0059] Furthermore, by moving the connecting rod 233 along the Z axis in the guide sliding groove 2321, the guide limiting effect of the guide sliding groove 2321 on the connecting rod 233 can be provided, so that the guiding property and stability of the second cutter 24 moving along the Z axis can be ensured, and the second cutter 24 can better cooperate with the first cutter 22 to cut the pole lug 101, so that the quality of the cut pole lug 101 can be better ensured.

[0060] Further, as shown in the drawings, Figure 2 the first cutter 22 and the second cutter 24 have the same structure; only the specific structure of the first cutter 22 will be described below; specifically, the first cutter 22 comprises four sub-cutting blades 221, the four sub-cutting blades 221 are sequentially arranged to form a square frame, and a square through hole 222 is formed in the middle of the square frame, so that the cut piece passes through the square through hole 222 and automatically falls downward along the Z axis.

[0061] By arranging the first cutter 22 comprising four sub-cutting blades 221, the contact cutting area between the first cutter 22 and the pole piece 10 can be large, so that the first cutter 22 can directly and quickly cut the pole piece 10, and the cutting effect on the pole lug 101 can be ensured.

[0062] Specifically, as shown in the drawings, Figure 2As shown, the tab cutting mechanism 2 further comprises a collection box 25, which is arranged below the second cutter 24 and is used to collect the cut pieces cut by the first cutter 22 and the second cutter 24, so as to realize unified collection and management of the cut pieces.

[0063] Further, as shown in Figure 2 , the diameter of the square through hole 222 in the square frame is not greater than the inner diameter of the collection box 25, so as to avoid the cut pieces falling along the Z axis through the square through hole 222 from falling out of the collection box 25, thereby ensuring that the cut pieces stably fall into the collection box 25 for collection.

[0064] Specifically, as shown in Figure 1 and Figure 2 , the tab cutting mechanism 2 is provided with two, which are arranged on opposite sides of the tab sheet 10 along the unwinding direction of the tab sheet 10, so as to simultaneously cut the tabs 101 on opposite sides of the tab sheet 10 through the two tab cutting mechanisms 2, thereby improving the cutting efficiency of the tabs 101, and further ensuring the rolling work efficiency of the composite tab sheet 40. The unwinding direction of the tab sheet 10 is specifically shown by the arrow A in Figure 1 .

[0065] Further, as shown in Figure 1 , the diaphragm unwinding mechanism comprises a first diaphragm unwinding mechanism 3 and a second diaphragm unwinding mechanism 4; wherein the first diaphragm unwinding mechanism 3 and the second diaphragm unwinding mechanism 4 are located downstream of the tab cutting mechanism 2, the first diaphragm unwinding mechanism 3 is used to unwind the first diaphragm 20, and the first diaphragm 20 is arranged on the upper surface of the tab sheet 10, the second diaphragm unwinding mechanism 4 is used to unwind the second diaphragm 30, and the second diaphragm 30 is arranged on the lower surface of the tab sheet 10; the rolling mechanism 5 is located downstream of the first diaphragm unwinding mechanism 3 and the second diaphragm unwinding mechanism 4, and the rolling mechanism 5 is used to heat and roll the first diaphragm 20, the tab sheet 10 and the second diaphragm 30 to form the composite tab sheet 40 described above. Wherein the first diaphragm unwinding mechanism 3 and the second diaphragm unwinding mechanism 4 can adopt the common unwinding roll structure in the prior art.

[0066] Further, as shown in Figure 1 , the rolling mechanism 5 comprises a first pressure roller 51, a second pressure roller 52 and a heating member; wherein the first pressure roller 51 is fixedly arranged; the second pressure roller 52 is oppositely arranged above the first pressure roller 51, the second pressure roller 52 can approach or move away from the first pressure roller 51, the first diaphragm 20, the tab sheet 10 and the second diaphragm 30 are inserted between the first pressure roller 51 and the second pressure roller 52 for rolling and bonding; the first pressure roller 51 and / or the second pressure roller 52 is provided with a heating member.

[0067] By allowing the second pressure roller 52 to move closer to or further away from the first pressure roller 51, on the one hand, the distance between the second pressure roller 52 and the first pressure roller 51 can be adjusted so that the first pressure roller 51 and the second pressure roller 52 can roll-press electrode sheets 10 of various thicknesses and sizes, thereby improving the applicability and versatility of the entire composite electrode rolling device; on the other hand, the distance between the first pressure roller 51 and the second pressure roller 52 can be adjusted to a more suitable level, resulting in a better rolling and bonding effect between the first diaphragm 20, the electrode sheet 10 and the second diaphragm 30, thereby better ensuring the quality of the formed composite electrode sheet 40.

[0068] Furthermore, by providing a heating element, the first pressure roller 51 and / or the second pressure roller 52 can be heated, thereby facilitating the heating of the first diaphragm 20 and the second diaphragm 30. This allows the first diaphragm 20 to adhere to the upper surface of the electrode 10, and the second diaphragm 30 to adhere to the lower surface of the electrode 10. Specifically, the heating element can be an electric heating element. The specific structure of the heating element is not limited here, as long as it can achieve the heating function.

[0069] Specifically, such as Figure 1 As shown, the diaphragm winding mechanism includes a first diaphragm winding mechanism 8 and a second diaphragm winding mechanism 9. The first diaphragm winding mechanism 8 is located between the roller pressing mechanism 5 and the electrode winding mechanism 7, and is used to wind up the remaining first diaphragm 20 after it has been roller-pressed onto the electrode 10. The second diaphragm winding mechanism 9 is located between the roller pressing mechanism 5 and the electrode winding mechanism 7, and is used to wind up the remaining second diaphragm 30 after it has been roller-pressed onto the electrode 10. Both the first diaphragm winding mechanism 8 and the second diaphragm winding mechanism 9 can employ common winding roller structures found in the prior art.

[0070] Specifically, after the first diaphragm 20, unwound by the first diaphragm unwinding mechanism 3, is rolled and bonded to the electrode 10, the first diaphragm 20 located between the first diaphragm unwinding mechanism 3 and the first diaphragm winding mechanism 8 is disconnected. At this time, the first diaphragm winding mechanism 8 rewinds the disconnected portion of the first diaphragm 20 located in the first diaphragm winding mechanism 8. Then, the first diaphragm 20 of the first diaphragm unwinding mechanism 3 is passed through the rolling mechanism 5 and wound onto the first diaphragm winding mechanism 8 to facilitate the next rolling and bonding of the electrode 10. The unwinding and rewinding process of the second diaphragm 30 is basically the same as that of the first diaphragm 20, and can be referred to the above description of the unwinding and rewinding of the first diaphragm 20.

[0071] Furthermore, such as Figure 1As shown, the composite tab roll pressing device further comprises a first tension buffer mechanism 6 and a second tension buffer mechanism 13; wherein the first tension buffer mechanism 6 is located between the tab unwinding mechanism 1 and the tab cutting mechanism 2, and the first tension buffer mechanism 6 is used to buffer the tension fluctuation of the tab 10 when the tab unwinding mechanism 1 unwinds, so that the tension of the unwound tab 10 is more appropriate, and the tab 10 will not be too loose or too tight; the second tension buffer mechanism 13 is located between the tab winding mechanism 7 and the roll pressing mechanism 5, and the second tension buffer mechanism 13 is used to buffer the tension fluctuation of the composite tab 40 when the tab winding mechanism 7 winds, so that the tension of the composite tab 40 when winding is more appropriate, and the composite tab 40 will not be too loose or too tight. Wherein the first tension buffer mechanism 6 and the second tension buffer mechanism 13 both adopt the common tension roller structure in the prior art.

[0072] Further, as shown in the drawings, Figure 1 The composite tab roll pressing device further comprises a first stretching mechanism 11 and a second stretching mechanism 12; wherein the first stretching mechanism 11 is located between the tab cutting mechanism 2 and the roll pressing mechanism 5, and the first stretching mechanism 11 is used to stretch the tab 10 to improve the ductility of the tab 10; and the first diaphragm unwinding mechanism 3 and the second diaphragm unwinding mechanism 4 are respectively located on the opposite sides of the first stretching mechanism 11; the second stretching mechanism 12 is located between the roll pressing mechanism 5 and the tab winding mechanism 7, and the second stretching mechanism 12 is used to stretch the composite tab 40 to improve the ductility of the formed composite tab 40; and the first diaphragm winding mechanism 8 and the second diaphragm winding mechanism 9 are respectively located on the opposite sides of the second stretching mechanism 12. Wherein the above-mentioned second tension buffer mechanism 13 is specifically located between the tab winding mechanism 7 and the second stretching mechanism 12. Wherein the first stretching mechanism 11 and the second stretching mechanism 12 adopt the common stretching roller structure in the prior art. As shown in the drawings, Figure 1 By setting the tab cutting mechanism 2 upstream of the first stretching mechanism 11, that is, after the tab cutting mechanism 2 cuts the tab 10 to form the tab 101, the tab 10 passes through the first stretching mechanism 11 for stretching, so that the gap space 102 formed when the tab 101 is cut on the tab 10 can provide accommodation for the stretching of the tab 10, so that the flatness of the tab 10 can be guaranteed, thereby facilitating the subsequent roll pressing and adhesion, and further guaranteeing the flatness of the composite tab 40 formed by roll pressing; and since the tab 101 after passing through the first stretching mechanism 11 has good ductility, the problem of tab 101 breakage during roll pressing can be reduced, and the qualified rate of the tab 101 can be guaranteed, thereby better reducing the scrap rate of the composite tab 40.

[0073] And, as shown in the drawings, Figure 1As shown, by locating the first diaphragm unwinding mechanism 3 and the second diaphragm unwinding mechanism 4 on opposite sides of the first stretching mechanism 11 respectively, and locating the first diaphragm winding mechanism 8 and the second diaphragm winding mechanism 9 on opposite sides of the second stretching mechanism 12 respectively, the overall layout of each mechanism can be more reasonable and compact, reducing the layout area occupied by each mechanism, and further facilitating the guarantee of the compactness of the entire composite tab roll pressing device.

[0074] Specifically, as shown, Figure 1 The composite tab roll pressing device further comprises a plurality of guide rollers 14, which are arranged in sequence and at intervals along the unwinding direction of the tab 10, so as to provide stable guiding action for the tab 10, the first diaphragm 20, the second diaphragm 30 and the composite tab 40 through each guide roller 14.

[0075] The specific working process of the composite tab roll pressing device in the embodiment is as follows:

[0076] Firstly, the tab 10 is unwound by the tab unwinding mechanism 1, and then the tension of the tab 10 during unwinding is relieved by the first tension buffer mechanism 6, so that the tension of the tab 10 is more appropriate.

[0077] Then, the tab ear cutting mechanism 2 is entered, so that the first driving part 211 drives the first cutter 22 to cut the upper surface of the tab 10 downward along the Z axis, and the second driving part 231 drives the second cutter 24 to cut the lower surface of the tab 10 upward along the Z axis, so as to cut off the cut-off pieces of the tab 10 under the mutual cutting action of the first cutter 22 and the second cutter 24, so that the part between the adjacent two cut-off pieces on the tab 10 forms the tab ear 101.

[0078] After that, the tab 10 with the tab ear 101 cut is made to enter the first stretching mechanism 11; at the same time, the first diaphragm unwinding mechanism 3 unwinds the first diaphragm 20, the second diaphragm unwinding mechanism 4 unwinds the second diaphragm 30, and the first diaphragm 20, the tab 10 and the second diaphragm 30 enter between the first pressing roller 51 and the second pressing roller 52 of the roll pressing mechanism 5 together, and the heating part heats the first pressing roller 51 and / or the second pressing roller 52, so that the first diaphragm 20, the tab 10 and the second diaphragm 30 are roll pressed and bonded to form the composite tab 40 through the roll pressing action between the first pressing roller 51 and the second pressing roller 52.

[0079] Finally, the formed composite tab 40 is made to pass through the second stretching mechanism 12 in sequence for extension stretching, the second tension buffer mechanism 13 for tension buffering, and the tab winding mechanism 7 for winding; so as to complete the entire roll pressing process of the composite tab 40.

[0080] The composite pole piece roll pressing device in the embodiment can provide accommodation allowance for the extension stretching of the pole piece 10 through the gap space 102 formed by cutting the pole lug 101 on the pole piece 10, so as to ensure the flatness of the composite pole piece 40 formed by roll pressing; and since the pole lug 101 after the first stretching mechanism 11 has good ductility, the problem of broken pole lug 101 in the roll pressing process can be reduced, the qualified rate of the pole lug 101 is ensured, and thus the scrap rate of the composite pole piece 40 can be better reduced.

[0081] The composite pole piece roll pressing device in the embodiment can provide accommodation allowance for the extension stretching of the pole piece 10 through the gap space 102 formed by cutting the pole lug 101 on the pole piece 10, so as to ensure the flatness of the composite pole piece 40 formed by roll pressing; and since the pole lug 101 after the first stretching mechanism 11 has good ductility, the problem of broken pole lug 101 in the roll pressing process can be reduced, the qualified rate of the pole lug 101 is ensured, and thus the scrap rate of the composite pole piece 40 can be better reduced.

[0082] The composite pole piece roll pressing device in the embodiment can provide accommodation allowance for the extension stretching of the pole piece 10 through the gap space 102 formed by cutting the pole lug 101 on the pole piece 10, so as to ensure the flatness of the composite pole piece 40 formed by roll pressing; and since the pole lug 101 after the first stretching mechanism 11 has good ductility, the problem of broken pole lug 101 in the roll pressing process can be reduced, the qualified rate of the pole lug 101 is ensured, and thus the scrap rate of the composite pole piece 40 can be better reduced.

[0083] The composite pole piece roll pressing device in the embodiment can provide accommodation allowance for the extension stretching of the pole piece 10 through the gap space 102 formed by cutting the pole lug 101 on the pole piece 10, so as to ensure the flatness of the composite pole piece 40 formed by roll pressing; and since the pole lug 101 after the first stretching mechanism 11 has good ductility, the problem of broken pole lug 101 in the roll pressing process can be reduced, the qualified rate of the pole lug 101 is ensured, and thus the scrap rate of the composite pole piece 40 can be better reduced.

[0084] The above is only a preferred embodiment of the utility model, and for ordinary skilled persons in the art, the specific implementation manner and application range can be changed according to the idea of the utility model, and the content of the specification should not be understood as limiting the utility model.

Claims

1. A composite electrode sheet rolling device characterized by comprising: It comprises, arranged in sequence: A pole piece unwinding mechanism (1), a tab cutting mechanism (2), a diaphragm unwinding mechanism, a rolling mechanism (5), a diaphragm winding mechanism and a pole piece winding mechanism (7); Wherein, the tab cutting mechanism (2) comprises a first cutting mechanism arranged above the tab position of the pole piece (10) and a second cutting mechanism arranged below the tab position of the pole piece (10).

2. The composite electrode sheet roll press apparatus according to claim 1, wherein The first cutting mechanism comprises: A first driving assembly (21) arranged above the pole piece (10); A first cutter (22) connected with the driving end of the first driving assembly (21), and the first cutter (22) is correspondingly arranged above the tab position of the pole piece (10); The second cutting mechanism comprises: A second driving assembly (23) arranged below the pole piece (10); A second cutter (24) connected with the driving end of the second driving assembly (23), and the second cutter (24) is correspondingly arranged below the tab position of the pole piece (10).

3. The composite electrode sheet roll press apparatus according to claim 2, wherein The first driving assembly (21) comprises: A first driving member (211) with a fixed end fixedly arranged above the pole piece (10); A first connecting plate (212) arranged in parallel above the pole piece (10), the top end of the first connecting plate (212) is connected to the driving end of the first driving member (211), the first cutter (22) is connected to the bottom end of the first connecting plate (212), and the first driving member (211) is used to drive the first connecting plate (212) to move along the Z axis.

4. The composite electrode sheet roll press apparatus according to claim 2, wherein The second driving assembly (23) comprises: A second driving member (231) located on one side of the pole piece (10); A second connecting plate (232) fixedly arranged, the second connecting plate (232) is arranged vertically on one side of the pole piece (10), and a guide sliding groove (2321) extending along the Z axis is arranged on the second connecting plate (232); A connecting rod (233) located below the pole piece (10), one end of the connecting rod (233) is connected with the driving end of the second driving member (231), the other end passes through the guide sliding groove (2321) and is connected with the second cutter (24), and the second driving member (231) is used to drive the connecting rod (233) to move along the Z axis in the guide sliding groove (2321).

5. The composite electrode sheet roll press apparatus according to claim 2, wherein The first cutter (22) and the second cutter (24) are the same in structure; the first cutter (22) comprises: Four cutter blades (221), four cutter blades (221) are sequentially arranged to form a square frame, and a square through hole (222) is formed in the middle of the square frame, and the cut piece cut by the first cutter (22) and the second cutter (24) can pass through the square through hole (222).

6. The composite electrode sheet roll press apparatus according to claim 5, wherein The tab cutting mechanism (2) further comprises: A collection box (25) arranged below the second cutter (24), and the collection box (25) is used to collect the cut piece.

7. The composite electrode sheet roll press apparatus according to any one of claims 1 to 6, wherein The tab cutting mechanism (2) is provided with two, along the unwinding direction of the pole piece (10), two said tab cutting mechanism (2) is respectively arranged on the opposite sides of the pole piece (10).

8. The composite electrode lamination roll press apparatus of any one of claims 1-6, wherein, The diaphragm unwinding mechanism comprises a first diaphragm unwinding mechanism (3) and a second diaphragm unwinding mechanism (4). The diaphragm winding mechanism comprises a first diaphragm winding mechanism (8) and a second diaphragm winding mechanism (9). The roller pressing mechanism (5) comprises a first pressing roller (51), a second pressing roller (52) and a heating member.

9. The composite electrode sheet roll press apparatus according to any one of claims 1 to 6, wherein The composite pole piece roller pressing device further comprises: A first tension buffer mechanism (6) is arranged between the pole piece unwinding mechanism (1) and the tab cutting mechanism (2); A second tension buffer mechanism (13) is arranged between the pole piece winding mechanism (7) and the roller pressing mechanism (5).

10. The composite electrode lamination roll press apparatus of claim 9, wherein, The composite pole piece roller pressing device further comprises: A first stretching mechanism (11) is arranged between the tab cutting mechanism (2) and the roller pressing mechanism (5); A second stretching mechanism (12) is arranged between the roller pressing mechanism (5) and the second tension buffer mechanism (13).

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