Pole piece extension device and pole piece manufacturing equipment

Abstract

The utility model relates to the technical field of battery manufacturing, and discloses a pole piece extension device and pole piece manufacturing equipment, the pole piece extension device comprises a support roller, a connecting piece, a compression roller and a transition piece, and the compression roller is configured to roll a tab area of a pole piece; the pressing roller and the transition piece are both arranged on the supporting roller in a sleeving mode, and the connecting piece penetrates through the pressing roller and the transition piece and is detachably connected with the supporting roller, so that the pressing roller and the transition piece are both connected with the supporting roller; the diameter of the pressing roller is larger than that of the supporting roller, one side of the pressing roller abuts against the transition piece, and the diameter of the transition piece is gradually decreased in the direction away from the pressing roller, so that the pressing roller can be correspondingly rolled in the tab area, and uneven rolling caused by the fact that the right-angle pressing roller is directly pressed in the tab area can be avoided through the arranged transition piece; the technical problem that the tab area is easy to warp in the prior art is solved, and the technical effect that the tab area at the edge is smoother is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery manufacturing, especially relates to a pole piece extension device and pole piece manufacturing equipment. BACKGROUND

[0002] In the production process of lithium battery, the pole piece is rolled from the initial thickness to the target thickness in the rolling process, so that the volume density of the pole piece is larger, and the adhesion of the active material and the current collector is better. In the rolling process, the pole piece of the dressing area inevitably appears the extension phenomenon, that is, the dressing area is elongated along a certain direction under stress, and the extension of the pole piece in the belt direction is the most obvious. However, the pole piece of the dressing area is extended under pressure, the current collector (pole lug) without dressing does not occur extension, and the difference between the two extensions causes the dressing area of the transition position to produce waves, resulting in the edge of the pole piece being warped. SUMMARY

[0003] The utility model discloses a pole piece extension device and pole piece manufacturing equipment, and solves the technical problem that the edge of the pole piece is easy to warp in the prior art.

[0004] In order to solve the above technical problems, the utility model provides a pole piece extension device, which comprises a supporting roller, a connecting piece, a compression roller and a transition piece, the compression roller is configured to roll the pole lug area of the pole piece,

[0005] The compression roller and the transition piece are sleeved on the supporting roller, the connecting piece is arranged on the compression roller and the transition piece and is detachably connected with the supporting roller, so that the compression roller and the transition piece are connected with the supporting roller.

[0006] The diameter of the compression roller is greater than the diameter of the supporting roller, one side of the compression roller abuts against the transition piece, and the diameter of the transition piece decreases along the direction away from the compression roller.

[0007] In an optional embodiment, the compression roller comprises a first half ring and a second half ring;

[0008] The first half ring and the second half ring are respectively sleeved on the supporting roller, the first half ring and the second half ring abut to form the annular compression roller, and the first half ring and the second half ring are respectively connected with the connecting piece.

[0009] In an optional embodiment, the transition piece comprises a first roller piece and a second roller piece, both of which are annular;

[0010] The second roller piece abuts against one side of the first roller piece away from the compression roller, and the outer diameter of the first roller piece is greater than that of the second roller piece.

[0011] In an optional embodiment, the first roller piece comprises a third half ring and a fourth half ring, and the second roller piece comprises a fifth half ring and a sixth half ring.

[0012] The third half ring and the fourth half ring are respectively sleeved on the support roller, and the third half ring and the fourth half ring are respectively connected with the connecting piece.

[0013] The fifth half ring and the sixth half ring are respectively sleeved on the support roller, and the fifth half ring and the sixth half ring are respectively connected with the connecting piece.

[0014] In an optional embodiment, a fillet is arranged on the outer diameter of the first roller piece and the outer diameter of the second roller piece, and the two fillets are smoothly transitioned.

[0015] In an optional embodiment, a step is arranged on the support roller, the side wall of the step, the compression roller and the transition piece are sequentially abutted, and the outer diameters of the compression roller and the transition piece are greater than the outer diameter of the step.

[0016] In an optional embodiment, the connecting piece comprises a connecting bolt and a connecting sleeve ring.

[0017] The connecting sleeve ring is sleeved on the support roller, the connecting sleeve ring is arranged on the side of the compression roller away from the transition piece, the connecting bolt sequentially penetrates the connecting sleeve ring, the compression roller and the transition piece and is connected with the step.

[0018] In an optional embodiment, the connecting piece further comprises a locking ring, the support roller is provided with a screw rod part, the locking ring is threadedly connected with the screw rod part, and the locking ring presses the connecting sleeve ring.

[0019] In an optional embodiment, the connecting piece, the compression roller and the transition piece are arranged at both ends of the support roller.

[0020] The utility model provides a kind of pole piece manufacturing equipment, including the pole piece extension device.

[0021] The utility model provides an electrode piece extension device, including support roller, connecting piece, compression roller and transition piece, compression roller is configured as the ear area of electrode piece is rolled, compression roller and transition piece all are set on support roller, connecting piece is set in compression roller and transition piece and with support roller detachable connection, to make compression roller and transition piece all with support roller connection, the diameter of compression roller is greater than the diameter of support roller, one side of compression roller and transition piece abut, the diameter of transition piece is decreasingly set along the direction of deviating from compression roller, to make compression roller can correspondingly roll in ear area, and the transition piece set up can avoid the compression roller of right angle and directly press in ear area and lead to uneven rolling, also avoid leaving the indentation in ear area, solved the technical problem of ear area easy to warp in the prior art, reached the technical effect that the ear area of edge is more level. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the structure schematic view of electrode piece extension device mentioned in the utility model embodiment;

[0023] Figure 2 It is the sectional view of electrode piece extension device mentioned in the utility model embodiment;

[0024] Figure 3 It is Figure 2 The local structure schematic view of;

[0025] Figure 4 It is the structure schematic view of connecting sleeve ring mentioned in the utility model embodiment;

[0026] Figure 5 It is the structure schematic view of compression roller and transition piece mentioned in the utility model embodiment;

[0027] Figure 6 It is the structure schematic view of locking ring mentioned in the utility model embodiment.

[0028] In the drawing, 1-support roller;2-connecting piece;201-connecting bolt;202-connecting sleeve ring;203-locking ring;3-compression roller;301-first half ring;302-second half ring;4-transition piece;401-first roller piece;4011-third half ring;4012-fourth half ring;402-second roller piece;4021-fifth half ring;4022-sixth half ring;5-step;6-screw part. DETAILED DESCRIPTION

[0029] The specific implementation of the utility model is described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In related technologies, the electrode sheet in the dressing area is stretched under pressure, while the electrode tab in the undressed area is not stretched under pressure. The difference in stretching between the two causes waves to form in the dressing area at the junction, resulting in warping of the electrode tab.

[0032] In view of this, such as Figures 1-6 As shown, some embodiments of this utility model provide an electrode sheet stretching device, including a support roller 1, a connecting member 2, a pressure roller 3, and a transition member 4. The pressure roller 3 is configured to roll the tab area of ​​the electrode sheet. The pressure roller 3 and the transition member 4 are both sleeved on the support roller 1. The connecting member 2 passes through the pressure roller 3 and the transition member 4 and is detachably connected to the support roller 1 so that the pressure roller 3 and the transition member 4 are both connected to the support roller 1. The diameter of the pressure roller 3 is larger than the diameter of the support roller 1. One side of the pressure roller 3 abuts against the transition member 4. The diameter of the transition member 4 decreases along the direction away from the pressure roller 3.

[0033] In the above embodiments, the electrode sheet may include an electrode tab area and a material stacking area, which are adjacent and integrally formed. The support roller 1 may be made of metal and may be cylindrical. A pressure roller 3 and a transition piece 4 are sleeved on the support roller 1. The inner diameter of the pressure roller 3 and the inner diameter of the transition piece 4 may be the same and the same as the outer diameter of the support roller 1. The pressure roller 3 and the transition piece 4 are respectively sleeved on the support roller 1, and the transition piece 4 is located at the boundary between the electrode tab area and the material stacking area. The outer diameter of the transition piece 4 may be variable, and the outer diameter of the transition piece 4 may decrease along the direction away from the pressure roller 3, so that when the support roller 1 drives the pressure roller 3 and the transition piece 4 to press the electrode sheet, the electrode tab area can be squeezed by the pressure roller 3. The tab area is extended and transitioned through the transition piece 4 on the side of the pressure roller 3 near the stacking area. This prevents the right-angled edge of the pressure roller 3 from squeezing grooves into the tab area, thus making the extended stacking area and tab area flatter. Furthermore, the connector 2 can connect the support roller 1, the transition piece 4 and the pressure roller 3 together. The connector 2 can be made of screws. Multiple connectors 2 are inserted obliquely into the pressure roller 3 and the transition piece 4 to fix the pressure roller 3 and the transition piece 4. Then, they are inserted obliquely into the threaded holes on the support roller 1 for connection, so that the pressure roller 3 and the transition piece 4 are both fixed on the support roller 1. During the rolling process of the pressure roller 3 and the transition piece 4, the connector 2 cannot touch the electrode sheet, thus avoiding the connector 2 from affecting the rolling effect.

[0034] The utility model discloses some embodiments provide an electrode piece extension device, including support roller 1, connecting piece 2, compression roller 3 and transition piece 4, make compression roller 3 can correspondly roll in the pole lug area, and the transition piece 4 set up can avoid the compression roller 3 of direct pressure in the pole lug area and lead to uneven roll, also avoid leaving the indentation in the pole lug area, solved the technical problem of the pole lug area easy warping in the prior art, reached the technical effect that the pole lug area of edge is more level.

[0035] In optional implementation, the compression roller 3 includes a first half ring 301 and a second half ring 302; the first half ring 301 and the second half ring 302 are respectively sleeved on the support roller 1, and the first half ring 301 and the second half ring 302 abut to form the annular compression roller 3; the first half ring 301 and the second half ring 302 are respectively connected with the connecting piece 2.

[0036] In the above embodiment, the first half ring 301 and the second half ring 302 are symmetrical in shape along the diameter of the support roller 1; when the two end faces of the first half ring 301 and the second half ring 302 abut, the inner diameter surrounded by the first half ring 301 and the second half ring 302 is consistent with the outer diameter of the support roller 1, so that the first half ring 301 and the second half ring 302 can be symmetrically sleeved on the support roller 1, and the first half ring 301 and the second half ring 302 can be respectively connected to the support roller 1 through the connecting piece 2, so that the first half ring 301 and the second half ring 302 can be replaced by disassembling the connecting piece 2, and the replacement does not need to be taken out through the end face of the support roller 1, so that the replacement is more time-saving and labor-saving, and is convenient for products with different rolling requirements.

[0037] In optional implementation, the transition piece 4 includes a first roller piece 401 and a second roller piece 402, both of which are annular; the second roller piece 402 abuts on the side of the first roller piece 401 away from the compression roller 3; and the outer diameter of the first roller piece 401 is greater than that of the second roller piece 402.

[0038] In the above embodiment, the inner diameters of the first roller piece 401 and the second roller piece 402 are consistent, and the axes of the first roller piece 401 and the second roller piece 402 are arranged on the same straight line; the first roller piece 401 and the second roller piece 402 can be sequentially arranged along the axial direction of the support roller 1, and the first roller piece 401 and the second roller piece 402 can abut together; and the outer diameter of the first roller piece 401 is greater than that of the second roller piece 402, so that the transition of the compression roller 3 during the extension of the pole lug area can be realized through the two roller pieces with different outer diameters, and linear gullies generated after rolling by the compression roller 3 can be avoided.

[0039] In an optional embodiment, the first roller piece 401 comprises a third half ring 4011 and a fourth half ring 4012, and the second roller piece 402 comprises a fifth half ring 4021 and a sixth half ring 4022; the third half ring 4011 and the fourth half ring 4012 are respectively sleeved on the support roller 1, and the third half ring 4011 and the fourth half ring 4012 are respectively connected with the connecting piece 2; the fifth half ring 4021 and the sixth half ring 4022 are respectively sleeved on the support roller 1, and the fifth half ring 4021 and the sixth half ring 4022 are respectively connected with the connecting piece 2.

[0040] In the above embodiment, the third half ring 4011 and the fourth half ring 4012 are symmetrical to the diameter of the support roller 1, and the inner diameter of the ring formed by the third half ring 4011 and the fourth half ring 4012 can be consistent with the outer diameter of the support roller 1 after the two ends of the third half ring 4011 and the fourth half ring 4012 abut against each other; and the third half ring 4011 and the fourth half ring 4012 can also be fixed on the support roller 1 through the connecting piece 2 respectively; and the fifth half ring 4021 and the sixth half ring 4022 can also be symmetrical to the diameter of the support roller 1, and the inner diameter of the ring formed by the fifth half ring 4021 and the sixth half ring 4022 can also be consistent with the outer diameter of the support roller 1 after the two ends of the fifth half ring 4021 and the sixth half ring 4022 abut against each other; and the fifth half ring 4021 and the sixth half ring 4022 can also be fixed on the support roller 1 through the connecting piece 2 respectively, so that the third half ring 4011, the fourth half ring 4012, the fifth half ring 4021 and the sixth half ring 4022 can be conveniently removed through the connecting piece 2, thereby making the replacement of the transition piece 4 more smooth.

[0041] In an optional embodiment, a fillet is arranged on the outer diameter of the first roller piece 401 and the outer diameter of the second roller piece 402, and the two fillets are smoothly transitioned.

[0042] In the above embodiment, a fillet can be arranged on the outer diameter of the third half ring 4011, the fourth half ring 4012, the fifth half ring 4021 and the sixth half ring 4022, and the fillet can be arranged obliquely, that is, the fillets on the third half ring 4011 and the fourth half ring 4012 are connected with the fillets on the fifth half ring 4021 and the sixth half ring 4022, so that the edges of the tab area are more smooth during the extension of the tab area by the compression roller 3.

[0043] In an optional embodiment, a step 5 is arranged on the support roller 1, and the compression roller 3, the transition piece 4 and the side wall of the step 5 abut against each other in sequence, and the outer diameters of the compression roller 3 and the transition piece 4 are both greater than the outer diameter of the step 5.

[0044] In the above embodiment, the step 5 is sleeved on the support roller 1, the diameter of the step 5 is greater than the diameter of the support roller 1, and the diameter of the step 5 is smaller than the diameter of the pressure roller 3 and the transition piece 4, the side wall of the step 5 abuts against the second roller piece 402, the first roller piece 401 and the pressure roller 3 in sequence, and the connecting piece 2 is connected on the side wall of the step 5 after passing through the pressure roller 3, the first roller piece 401 and the second roller piece 402 in sequence, so that the pressure roller 3, the first roller piece 401 and the second roller piece 402 are fixed.

[0045] In an optional embodiment, the connecting piece 2 comprises a connecting bolt 201 and a connecting sleeve ring 202; the connecting sleeve ring 202 is sleeved on the support roller 1, the connecting sleeve ring 202 is arranged on the side of the pressure roller 3 away from the transition piece 4, and the connecting bolt 201 passes through the connecting sleeve ring 202, the pressure roller 3 and the transition piece 4 in sequence and is connected with the step 5.

[0046] In the above embodiment, the connecting bolt 201 can be provided with four, the four connecting bolts 201 are uniformly arranged along the circumference of the axis of the support roller 1, and the connecting sleeve ring 202 can be annular, the connecting sleeve ring 202 is provided with four through holes, the first half ring 301, the second half ring 302, the third half ring 4011, the fourth half ring 4012, the fifth half ring 4021 and the sixth half ring 4022 are each provided with two through holes, so that the four bolts can respectively extend into the four through holes, and the first half ring 301, the second half ring 302, the third half ring 4011, the fourth half ring 4012, the fifth half ring 4021 and the sixth half ring 4022 are fixed on the support roller 1 through the connecting sleeve ring 202, and the connecting sleeve ring 202 can press the first half ring 301, the second half ring 302, the third half ring 4011, the fourth half ring 4012, the fifth half ring 4021 and the sixth half ring 4022.

[0047] In an optional embodiment, the connecting piece 2 further comprises a locking ring 203, the support roller 1 is provided with a screw portion 6, the locking ring 203 is threadedly connected with the screw portion 6, and the locking ring 203 presses the connecting sleeve ring 202.

[0048] In the above embodiment, the locking ring 203 can be provided in a circular ring shape, the locking ring 203 can be sleeved on the support roller 1 and arranged on one side of the step 5, the locking ring 203 can be connected with the screw rod part 6 of the surface of the support roller 1, so that the rotating locking ring 203 can move relative to the support roller 1 along the axial direction of the support roller 1, after the connecting bolt 201 is connected with the connecting sleeve ring 202, the connecting sleeve ring 202 is fixed on the support roller 1 with the first half ring 301, the second half ring 302, the third half ring 4011, the fourth half ring 4012, the fifth half ring 4021 and the sixth half ring 4022, the surface of the connecting bolt 201 and the surface of the connecting sleeve ring 202 are flush, then the locking ring 203 is pressed on the connecting sleeve ring 202 by rotating the locking ring 203, and the connecting bolt 201 and the connecting sleeve ring 202 are further fixed.

[0049] Optionally, a notch is arranged on the outer diameter of the locking ring 203, and an operator can drive the locking ring 203 to rotate relative to the support roller 1 by inserting a wrench into the notch.

[0050] In the optional embodiment, the support roller 1 is provided with the connecting piece 2, the compression roller 3 and the transition piece 4 at both ends.

[0051] In the above embodiment, the support roller 1 can be provided with two connecting pieces 2, two compression rollers 3 and two transition pieces 4, each compression roller 3 abuts against one transition piece 4 and is connected to the support roller 1 through one connecting piece 2, and the two connecting pieces 2, the two compression rollers 3 and the two transition pieces 4 arranged oppositely can be symmetrically arranged relative to the center line of the support roller 1, so that the two compression rollers 3 and the two transition pieces 4 on both sides can extend the areas on both sides of the pole piece, and the working efficiency is higher.

[0052] Some embodiments of the utility model provide a pole piece manufacturing equipment which comprises a pole piece extension device.

[0053] The above merely describes preferred embodiments of the utility model and is not intended to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An electrode stretching device, characterized in that, It includes a support roller, a connector, a pressure roller, and a transition member, wherein the pressure roller is configured to roll the tab area of ​​the electrode sheet; The pressure roller and the transition piece are both sleeved on the support roller, and the connecting piece passes through the pressure roller and the transition piece and is detachably connected to the support roller, so that the pressure roller and the transition piece are both connected to the support roller; The diameter of the pressure roller is larger than the diameter of the support roller. One side of the pressure roller abuts against the transition member, and the diameter of the transition member decreases in the direction away from the pressure roller.

2. The electrode stretching device according to claim 1, characterized in that, The pressure roller includes a first half-ring and a second half-ring; The first half-ring and the second half-ring are respectively sleeved on the support roller, and the first half-ring and the second half-ring abut against each other to form the annular pressure roller. The first half-ring and the second half-ring are respectively connected to the connecting member.

3. The electrode stretching device according to claim 1, characterized in that, The transition component includes a first roller and a second roller, both of which are annular. The second roller abuts against the side of the first roller away from the pressure roller, and the outer diameter of the first roller is larger than the outer diameter of the second roller.

4. The electrode stretching device according to claim 3, characterized in that, The first roller includes a third half-ring and a fourth half-ring, and the second roller includes a fifth half-ring and a sixth half-ring; The third half-ring and the fourth half-ring are respectively sleeved on the support roller, and the third half-ring and the fourth half-ring are respectively connected to the connecting member; The fifth and sixth semi-rings are respectively sleeved on the support roller, and the fifth and sixth semi-rings are respectively connected to the connector.

5. The electrode stretching device according to claim 4, characterized in that, Both the outer diameter of the first roller and the outer diameter of the second roller are provided with rounded corners, and the two rounded corners are smoothly transitioned.

6. The electrode stretching device according to claim 1, characterized in that, The support roller has a step, and the sidewalls of the pressure roller, the transition piece, and the step abut against each other in sequence. The outer diameters of the pressure roller and the transition piece are both larger than the outer diameter of the step.

7. The electrode stretching device according to claim 6, characterized in that, The connector includes a connecting bolt and a connecting collar; The connecting collar is sleeved on the support roller and is located on the side of the pressure roller away from the transition piece. The connecting bolt passes through the connecting collar, the pressure roller and the transition piece in sequence and is connected to the step.

8. The electrode stretching device according to claim 7, characterized in that, The connector also includes a locking ring, the support roller has a screw portion, the locking ring is threadedly connected to the screw portion, and the locking ring presses against the connecting collar.

9. The electrode stretching device according to claim 1, characterized in that, Both ends of the support roller are provided with the connecting member, the pressure roller, and the transition member connecting member and transition member.

10. An electrode manufacturing apparatus, characterized in that, Includes the electrode stretching device as described in any one of claims 1-9.

Images