Coating gasket, coating die head and coating machine

Abstract

The utility model discloses a coating gasket, a coating die head and a coating machine. The coating gasket comprises a main flow blocking section, a first flow blocking section and a second flow blocking section, the two side flow blocking sections extend out of the two ends of the main flow blocking section in the same direction respectively, and the outer ends of the two side flow blocking sections are bent oppositely to form a flow guide groove; the shunting section extends towards the diversion trench from the middle part of the main flow blocking section; wherein the shunting section is provided with a first adjusting structure which is used for adjusting the extension length of the shunting section; the side flow blocking section is provided with a second adjusting structure used for adjusting the extending length of the outer end of the side flow blocking section. According to the technical scheme, the universality of the coating gasket is improved, and the coating gasket can be used for coating battery core pole pieces with different coating widths and different coating types (including conventional coating and zebra coating) in a compatible manner.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery slurry coating, in particular to a coating gasket, a coating die head and a coating machine. Background Art

[0002] The manufacturing process of lithium-ion batteries mainly includes slurry preparation, slurry coating, drying, cutting, winding, packaging and other processes. Among them, slurry coating is an important process in the manufacture of lithium-ion batteries, and its main purpose is to evenly coat the slurry on the positive and negative electrodes of the battery. There are many ways to coat the slurry, one of which is slit extrusion coating, that is, the slurry is squeezed out from the slit of the coating die and coated on the battery cell electrode. The coating die generally includes an upper die and a lower die, and a coating gasket is sandwiched between the upper die and the lower die, forming a slit for the slurry to flow out.

[0003] At present, the coating width and coating type of coating gaskets are generally fixed. Therefore, when producing battery cell pole pieces with different coating widths, it is necessary to replace coating gaskets of different specifications and sizes; and when producing conventionally coated or zebra-coated battery cell pole pieces, it is necessary to replace them with conventionally coated gaskets or zebra-coated gaskets accordingly, which has poor versatility. Utility Model Content

[0004] The main purpose of the utility model is to provide a coating gasket to improve the versatility of the coating gasket and realize a coating gasket that is compatible with coating battery cell pole pieces with different coating widths and different coating types.

[0005] To achieve the above object, the utility model provides a coated gasket, which comprises:

[0006] Main flow blocking section;

[0007] Two side flow blocking sections extend in the same direction from two ends of the main flow blocking section respectively, and the outer ends of the two side flow blocking sections are bent toward each other to form a guide groove;

[0008] A flow diversion section extending from the middle of the main flow blocking section toward the guide groove;

[0009] The diverter section is provided with a first adjustment structure for adjusting the extension length of the diverter section; the side baffle section is provided with a second adjustment structure for adjusting the extension length of the outer end of the side baffle section.

[0010] In some embodiments, the flow diversion section includes a first connecting section and a first extending section, one end of the first connecting section is connected to the main flow blocking section, and the other end of the first connecting section is connected to the first extending section;

[0011] The first adjustment structure includes an insertion portion and a slot, the insertion portion is arranged on one of the first connecting section and the first extension section, and the slot is arranged on the other of the first connecting section and the first extension section. The insertion portion is inserted in the slot and can move in the slot to adjust the extension length of the diversion section.

[0012] In some embodiments, the first adjustment structure further includes a first fastener, a first fastening hole is provided through the slot wall of the slot, and the first fastener passes through the first fastening hole and abuts against the insertion portion.

[0013] In some embodiments, the side flow blocking section includes a second connecting section and a second extending section, one end of the second connecting section is connected to the main flow blocking section, the second extending section extends from the other end of the second connecting section toward the other side flow blocking section, and the extending end of the second extending section constitutes the outer end of the side flow blocking section;

[0014] The second adjustment structure includes a sliding portion and a sliding groove, the sliding portion is arranged on one of the second connecting section and the second extension section, the sliding groove is arranged on the other of the second connecting section and the second extension section, the sliding portion is arranged in the sliding groove and can slide in the sliding groove to adjust the extension length of the outer end of the side baffle section.

[0015] In some embodiments, the second adjustment structure further includes a second fastener, a second fastening hole is penetrated through the groove wall of the sliding groove, and the second fastener passes through the second fastening hole and abuts against the sliding portion.

[0016] In some embodiments, the surface of the second extension section is provided with scale lines arranged along its length direction.

[0017] In some embodiments, the two side flow blocking sections are symmetrically arranged at two ends of the main flow blocking section.

[0018] In some embodiments, the main baffle section is provided with a plurality of first mounting holes; and / or,

[0019] The side baffle section is provided with a plurality of second mounting holes.

[0020] The utility model also provides a coating die head, which comprises a lower die head, an upper die head connected to the lower die head and a coating gasket as described above, wherein the coating gasket is arranged between the upper die head and the lower die head.

[0021] The utility model also provides a coating machine, which comprises the coating die head as described above.

[0022] In the technical solution of the utility model, the coating gasket is provided with a shunt section, and the shunt section is provided with a first adjustment structure, the first adjustment structure can adjust the extension length of the shunt section, for example, increase the length of the shunt section to allow the shunt section to pass through the guide groove, so that the coating gasket can be suitable for zebra coating; for example, reduce the length of the shunt section so that the shunt section does not pass through the guide groove, so that the coating gasket can be suitable for conventional coating, so there is no need to replace the coating gasket of different coating types. At the same time, the side baffle section is provided with a second adjustment structure, the second adjustment structure can adjust the extension length of the outer end of the side baffle section, thereby adjusting the notch width of the guide groove, and can be suitable for coating of battery cell pole pieces with different coating widths, so there is no need to replace coating gaskets with different coating widths, saving the replacement time of the coating gasket, improving production efficiency, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a coating gasket in one embodiment of the utility model when used for conventional coating;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of a battery cell electrode sheet using conventional coating in the embodiment;

[0025] Figure 3 It is a schematic diagram of the structure of a coating gasket used for zebra coating in one embodiment of the utility model;

[0026] Figure 4 for Figure 3 A schematic diagram of the structure of a battery cell electrode sheet using zebra coating in an embodiment;

[0027] Figure 5 for Figure 1 A schematic diagram of the structure of the coating gasket in the embodiment at another viewing angle;

[0028] Figure 6 for Figure 5 The enlarged view of point A in the middle;

[0029] Description of Figure Numbers:

[0030] Label name Label name 100 Main flow block 10 Main flow block 200 Side baffle section 20 Slots 300 Diversion section 210 Second connecting section D Diversion trough 220 The second extension T Coating area 30 Sliding part J Battery cell pole piece 40 Chute 310 First connecting section K Tick ​​Mark 320 The first extension

[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the scheme in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0035] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0036] The embodiment of the utility model provides a coating gasket, which is compatible with coating battery cell pole pieces of different coating widths and different coating types (including conventional coating and zebra coating), thereby improving versatility.

[0037] Reference Figure 1 and Figure 3 The coating gasket of this embodiment includes a main flow blocking section 100, two side flow blocking sections 200 and a diverter section 300. The two side flow blocking sections 200 extend in the same direction from both ends of the main flow blocking section 100 respectively, and the outer ends of the two side flow blocking sections 200 are bent toward each other to form a guide groove D; the diverter section 300 extends from the middle of the main flow blocking section 100 toward the guide groove D; wherein, the diverter section 300 is provided with a first adjustment structure for adjusting the extension length of the diverter section 300; the side flow blocking section 200 is provided with a second adjustment structure for adjusting the extension length of the outer end of the side flow blocking section 200.

[0038] In this embodiment, the coating gasket is used in the coating process of the lithium battery and is a component used to control the shape of the coating flow channel. The coating gasket can be made of stainless steel or other metal materials. The coating gasket is assembled between the coating upper die head and the lower die head to form a slit between the upper die head and the lower die head. The slurry flows out of the slit under the action of external pressure and covers the surface of the lithium battery pole piece, thereby coating the pole piece.

[0039] Among them, the coating gasket of this embodiment includes a main baffle section 100, two side baffle sections 200 and a diverter section 300. The two side baffle sections 200 extend from the two ends of the main baffle section 100 in the same direction, respectively, and each side baffle section 200 is set at an angle to the main baffle section 100. Exemplarily, the two side baffle sections 200 are perpendicular to the main baffle section 100. The outer ends of the two side baffle sections 200 are bent toward each other, and a guide groove D is formed in the interval area between the bent parts, and the groove width of the guide groove D is the opening length of the coating die slit. The diverter section 300 extends from the middle of the main baffle section 100 toward the guide groove D. The diverter section 300 is located between the two side baffles and is set at an angle to the main baffle section 100. Exemplarily, the diverter section 300 is perpendicular to the main baffle section 100. Among them, the diverter section 300 is used to divert the slurry. It is easy to understand that, if Figure 1 As shown, when the diverter section 300 does not pass through the guide groove D (that is, the extension length of the diverter section 300 is less than the extension length of the side blocking section 200), the guide groove D has one notch, and the slurry flows out from one notch to be coated on the battery cell electrode J as a whole, thereby forming a structure as shown in FIG. Figure 2 The overall coating area T shown is conventional coating. Figure 3 As shown, when the diverter section 300 passes through the guide groove D (that is, the extension length of the diverter section 300 is equal to or greater than the extension length of the side blocking section 200), the notch of the guide groove D is divided into two by the diverter section 300, and the slurry is diverted by the diverter section 300 and flows out from the two notches to be coated on the battery cell electrode J at intervals, thereby forming a structure as shown in FIG. Figure 4 The zebra-shaped spaced coating areas T shown are ie zebra coating.

[0040] In the prior art, the coating gasket is generally an integrally formed metal sheet with fixed size specifications. When it is necessary to produce battery cell pole pieces with different coating widths, it is necessary to replace the coating gaskets with different sizes and specifications; and when producing conventionally coated or zebra-coated battery cell pole pieces, it is necessary to replace them with conventionally coated gaskets or zebra-coated gaskets accordingly, which has poor versatility.

[0041] To this end, the coating gasket of this embodiment also includes a first adjustment structure and a second adjustment structure, so as to adjust the coating width of the coating gasket through the first adjustment structure, or adjust the coating type (conventional coating or zebra coating) of the coating gasket through the second adjustment structure. Specifically, the first adjustment structure is arranged on the diverter section 300, and is used to adjust the extension length of the diverter section 300, such as increasing the length of the diverter section 300 so that the diverter section 300 passes through the guide groove D, so that the coating gasket can be applied to zebra coating; or reducing the length of the diverter section 300 so that the diverter section 300 does not pass through the guide groove D, so that the coating gasket can be applied to conventional coating, thereby eliminating the need to replace coating gaskets of different coating types. The second adjustment structure is arranged on the side baffle section 200, and is used to adjust the protruding length of the outer end of the side baffle section 200, thereby adjusting the slot width of the guide groove D. It can be suitable for coating of battery cell pole pieces with different coating widths, so there is no need to replace coating gaskets with different coating widths, which saves the time for replacing coating gaskets, improves production efficiency, and reduces production costs.

[0042] In some embodiments, reference Figure 1 and Figure 3 The diverter section 300 includes a first connecting section 310 and a first extension section 320, one end of the first connecting section 310 is connected to the main flow blocking section 100, and the other end of the first connecting section 310 is connected to the first extension section 320; the first adjustment structure includes an insert portion 10 and a slot 20, the insert portion 10 is arranged on one of the first connecting section 310 and the first extension section 320, the slot 20 is arranged on the other of the first connecting section 310 and the first extension section 320, the insert portion 10 is inserted in the slot 20, and can move in the slot 20 to adjust the extension length of the diverter section 300.

[0043] Specifically, the first connecting section 310 of the diverter section 300 is perpendicular to the main flow blocking section 100 and is integrally formed with the main flow blocking section 100, and the first extension section 320 is located at the end of the first connecting section 310 away from the main flow blocking section 100. Optionally, a slot 20 is provided on the first connecting section 310, and an inserting portion 10 is provided on the first extension section 320, and the first extension section 320 is inserted into the slot 20 on the first connecting section 310 through the inserting portion 10 thereon. The inserting portion 10 can be moved in the slot 20 to change the insertion depth, thereby changing the position of the first extension section 320, so as to adjust the extension length of the diverter section 300.

[0044] That is, the first extension section 320 can move toward or away from the guide groove D on the first connecting section 310. When zebra coating is required, the user can adjust the first extension section 320 to extend and pass through the guide groove D to the outside of the guide groove D to switch the coating gasket to a zebra coating gasket; when conventional coating is required, the user can adjust the first extension section 320 to shorten and retract from the guide groove D to the inside of the guide groove D to switch the coating gasket to a conventional coating gasket.

[0045] In some embodiments, the first adjustment structure further includes a first fastener (not shown), a first fastening hole (not shown) is provided through the slot wall of the slot 20 , and the first fastener passes through the first fastening hole and abuts against the insertion portion 10 .

[0046] Specifically, when it is necessary to adjust the extension length of the diverter section 300, the first fastener can be loosened to loosen the insertion part 10 so that the insertion part 10 can move in the slot 20, thereby adjusting the extension length of the diverter section 300. After the extension length of the diverter section 300 is adjusted, the first fastener can be tightened to make the first fastener abut against the insertion part 10, thereby fixing the insertion part 10 to limit the extension length of the diverter section 300. The number of the first fasteners can be one or more, and there is no limitation on this. The number of the first fastening holes is the same as the number of the first fasteners, and each first fastener is inserted into a first fastening hole. Optionally, the first fastener is a screw and the first fastening hole is a threaded hole.

[0047] In addition to the above-mentioned embodiments, the inserting portion 10 may also be fixed in the slot 20 by means of magnetic attraction or the like.

[0048] In some embodiments, reference Figure 1 , Figure 3 , Figure 5 and Figure 6 The side flow blocking section 200 includes a second connecting section 210 and a second extending section 220. One end of the second connecting section 210 is connected to the main flow blocking section 100. The second extending section 220 extends from the other end of the second connecting section 210 toward the other side flow blocking section 200. The extending end of the second extending section 220 constitutes the outer end of the side flow blocking section 200.

[0049] The second adjustment structure includes a sliding portion 30 and a sliding groove 40. The sliding portion 30 is arranged on one of the second connecting section 210 and the second extension section 220, and the sliding groove 40 is arranged on the other of the second connecting section 210 and the second extension section 220. The sliding portion 30 is arranged in the sliding groove 40 and can slide in the sliding groove 40 to adjust the extension length of the outer end of the side baffle section 200.

[0050] Specifically, the second connecting section 210 of the side flow blocking section 200 is perpendicular to the main flow blocking section 100 and is integrally formed with the main flow blocking section 100, and the second extension section 220 is located at the end of the second connecting section 210 away from the main flow blocking section 100. Optionally, a slide groove 40 is provided on the second connecting section 210, and a sliding portion 30 is provided on the second extension section 220, and the second extension section 220 is slidably arranged in the slide groove 40 on the second connecting section 210 through the sliding portion 30 thereon. The sliding portion 30 can slide in the slide groove 40 to change the position of the second extension section 220, so as to adjust the extension length of the outer end of the side flow blocking section 200.

[0051] That is, the second extension section 220 of the side baffle section 200 can be moved on the second connecting section 210 in a direction parallel to the main baffle section 100 toward or away from the other side baffle section 200. When the required coating width is small, the user can adjust the second extension section 220 to move it toward the other side baffle section 200 to extend it so as to reduce the slot width of the guide groove D, thereby reducing the coating width; when the required coating width is large, the user can adjust the second extension section 220 to move it away from the other side baffle section 200 to retract it so as to increase the slot width of the guide groove D, thereby increasing the coating width.

[0052] In some embodiments, the second adjustment structure further includes a second fastener (not shown), a second fastening hole (not shown) is provided through the groove wall of the slide groove 40 , and the second fastener passes through the second fastening hole and abuts against the sliding portion 30 .

[0053] Specifically, when it is necessary to adjust the extension length of the outer end of the side baffle section 200, the second fastener can be loosened to loosen the sliding part 30 so that the sliding part 30 can slide in the slide groove 40, thereby adjusting the extension length of the outer end of the side baffle section 200. After the extension length of the outer end of the side baffle section 200 is adjusted, the second fastener can be tightened to make the second fastener abut against the sliding part 30, thereby fixing the sliding part 30 to limit the extension length of the outer end of the side baffle section 200. The number of second fasteners can be one or more, and there is no limitation on this. The number of second fastening holes is the same as the number of second fasteners, and each second fastener is inserted into a second fastening hole. Optionally, the second fastener is a screw and the second fastening hole is a threaded hole.

[0054] In addition to the above-mentioned embodiments, the sliding portion 30 may also be fixed in the sliding groove 40 by means of magnetic attraction or the like.

[0055] In some embodiments, reference Figure 1 and Figure 3, the surface of the second extension section 220 is provided with scale lines K arranged along its length direction. In this embodiment, the scale lines K are length scale lines. Optionally, a sliding portion 30 or a slide groove 40 is provided on one side of the second extension section 220 facing the second connecting section 210, and the scale lines K are located on the other side of the second extension section away from the second connecting section 210. When adjusting the extension length of the outer end of the side baffle section 200, the scale lines K can be referred to for precise adjustment to improve the adjustment speed and efficiency. Among them, the scale range of the scale lines K can be set according to actual conditions, such as 0mm-135mm.

[0056] In some embodiments, reference Figure 1 and Figure 3 The two side flow blocking sections 200 are symmetrically arranged at both ends of the main flow blocking section 100. In this embodiment, the two side flow blocking sections 200 are symmetrically arranged at both ends of the main flow blocking section 100, and form a U-shaped coating gasket with the main flow blocking section 100.

[0057] In some embodiments, reference Figure 1 , a plurality of first mounting holes 1 are provided on the main baffle section 100; and / or, a plurality of second mounting holes 2 are provided on the side baffle section 200. In this embodiment, the first mounting holes 1 and the second mounting holes 2 are used to mount the coating gasket on the coating die head. Specifically, the coating die head includes an upper die head and a lower die head, and the upper die head and the lower die head are provided with connecting holes that match the first mounting holes 1 on the main baffle section 100, and then the coating gasket arranged between the upper die head and the lower die head is fixed by passing the screws arranged in the connecting holes through the first mounting holes 1 of the main baffle section 100. And / or, the upper die head and the lower die head are provided with connecting holes that match the second mounting holes 2 on the side baffle section 200, and then the coating gasket arranged between the upper die head and the lower die head is fixed by passing the screws arranged in the connecting holes through the second mounting holes 2 of the side baffle section 200.

[0058] The utility model also provides a coating die head, which includes a lower die head, an upper die head connected to the lower die head, and a coating gasket as described in the above embodiment, and the coating gasket is arranged between the upper die head and the lower die head. The specific structure of the coating gasket refers to the above embodiment. Since the coating die head adopts all the technical solutions of all the above embodiments, it has at least all the technical effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0059] The utility model also provides a coating machine, which includes a coating die head as described in the above embodiment. The specific structure of the coating die head refers to the above embodiment. Since the coating machine adopts all the technical solutions of all the above embodiments, it at least has all the technical effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0060] The above description is only a partial or preferred embodiment of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A coated gasket, characterized in that: include: Main flow blocking section; Two side flow blocking sections extend in the same direction from two ends of the main flow blocking section respectively, and the outer ends of the two side flow blocking sections are bent toward each other to form a guide groove; A flow diversion section extending from the middle of the main flow blocking section toward the guide groove; The diverter section is provided with a first adjustment structure for adjusting the extension length of the diverter section; the side baffle section is provided with a second adjustment structure for adjusting the extension length of the outer end of the side baffle section.

2. The coated gasket according to claim 1, characterized in that: The flow diversion section includes a first connecting section and a first extending section, one end of the first connecting section is connected to the main flow blocking section, and the other end of the first connecting section is connected to the first extending section; The first adjustment structure includes an insertion portion and a slot, the insertion portion is arranged on one of the first connecting section and the first extension section, and the slot is arranged on the other of the first connecting section and the first extension section. The insertion portion is inserted in the slot and can move in the slot to adjust the extension length of the diversion section.

3. The coated gasket according to claim 2, characterized in that: The first adjustment structure further includes a first fastener. A first fastening hole is formed through the slot wall of the slot. The first fastener passes through the first fastening hole and abuts against the insertion portion.

4. The coated gasket according to claim 1, characterized in that: The side flow blocking section comprises a second connecting section and a second extending section, one end of the second connecting section is connected to the main flow blocking section, the second extending section extends from the other end of the second connecting section toward the other side flow blocking section, and the extending end of the second extending section constitutes the outer end of the side flow blocking section; The second adjustment structure includes a sliding portion and a sliding groove, the sliding portion is arranged on one of the second connecting section and the second extension section, the sliding groove is arranged on the other of the second connecting section and the second extension section, the sliding portion is arranged in the sliding groove and can slide in the sliding groove to adjust the extension length of the outer end of the side baffle section.

5. The coated gasket according to claim 4, characterized in that: The second adjustment structure further includes a second fastener. A second fastening hole is provided through the groove wall of the slide groove. The second fastener passes through the second fastening hole and abuts against the sliding portion.

6. The coated gasket according to claim 4, characterized in that: The surface of the second extension section is provided with scale lines arranged along the length direction thereof.

7. The coated gasket according to any one of claims 1 to 6, characterized in that: The two side flow blocking sections are symmetrically arranged at two ends of the main flow blocking section.

8. The coated gasket according to any one of claims 1 to 6, characterized in that: The main baffle section is provided with a plurality of first mounting holes; and / or, The side baffle section is provided with a plurality of second mounting holes.

9. A coating die head, characterized in that: It comprises a lower die head, an upper die head connected to the lower die head, and a coating gasket as claimed in any one of claims 1 to 8, wherein the coating gasket is arranged between the upper die head and the lower die head.

10. A coating machine, characterized in that: Comprising the coating die as described in claim 9.

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