CN219591425U - Coating gasket - Google Patents

Abstract

The utility model discloses a coating gasket, comprising: the gasket body is provided with an upper surface and a lower surface, wherein the lower surface is provided with an active material runner, the upper surface is provided with a ceramic runner, both sides of the active material runner are provided with ceramic runners, the height of an outflow opening of the ceramic runner is higher than that of the outflow opening of the active material runner, and the outflow opening of the ceramic runner and the orthographic projection part of the outflow opening of the active material runner are overlapped or spliced with each other. The active material runner and the ceramic runner are respectively arranged on the lower surface and the upper surface of the gasket body, so that the active material runner and the ceramic runner form a height difference, and meanwhile, ceramic materials flowing out of the ceramic runner and active materials flowing out of the active material runner are partially overlapped or spliced with each other, so that gaps between the active materials and the ceramic materials can be avoided, the occurrence of foil leakage phenomenon is avoided, the risk of short circuit of the battery cell is reduced, and the rate of the coating process is guaranteed.

Description

Coating gasket

Technical Field

The utility model relates to the technical field of battery pole piece manufacturing, in particular to a coating gasket.

Background

Lithium ion batteries have advantages of high energy density, small self-discharge, and the like, and are widely used in a variety of products, such as 3C electronic products, and the like. In the face of the continuous increase of the requirements of consumers for quick battery charging, more and more consumer battery manufacturers begin to adopt a multi-tab structure in order to reduce the internal resistance of the battery. The cell coating mode of the multipolar ear structure is generally zebra coating, namely at least 2 active substance coating films are simultaneously coated on the empty foil at one time, and ceramic coating layers are simultaneously coated on two sides of each active substance coating film.

The existing zebra coating mode is to add a coating structure of ceramic materials on an active material coating die head, and when the active materials are coated, the ceramic materials are synchronously coated on two sides of the active materials; however, the main disadvantage is that the phenomenon of foil leakage often occurs after coating, that is, a gap exists between the ceramic material and the active material, so that the foil is exposed, the risk of short circuit of the battery cell exists, and the rate of the coating process is greatly affected.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides a coating gasket.

The utility model discloses a coating gasket, which comprises: the gasket body is provided with an upper surface and a lower surface, the lower surface is provided with an active material runner, the upper surface is provided with ceramic runners, the ceramic runners are positioned at two sides of the active material runner, the height of an outflow opening of the ceramic runner is higher than that of the outflow opening of the active material runner, and the orthographic projection of the outflow opening of the ceramic runner is overlapped with or spliced with the orthographic projection part of the outflow opening of the active material runner.

According to one embodiment of the utility model, the upper surface of the gasket body is provided with a groove which forms a ceramic runner, and the ceramic material flowing out of the groove is partially overlapped with or spliced with the active material flowing out of the active material runner.

According to an embodiment of the present utility model, the gasket body includes a first supporting piece, a second supporting piece and a third supporting piece, the second supporting piece is connected with one end of the first supporting piece and one end of the third supporting piece respectively, the other end of the first supporting piece and the other end of the third supporting piece extend in a direction parallel to the second supporting piece and are arranged opposite to each other, and the first supporting piece and the third supporting piece are both provided with grooves.

According to one embodiment of the utility model, the gasket body further comprises M flow dividing sheets, one ends of the M flow dividing sheets are connected with the second supporting sheets, and the flow dividing sheets are positioned between the first supporting sheets and the third supporting sheets; wherein M is more than or equal to 1.

According to an embodiment of the present utility model, an active material flow channel is formed between the first supporting sheet and the third supporting sheet, or at least one of the flow dividing sheet and the first supporting sheet, the flow dividing sheet and the third supporting sheet, and the adjacent flow dividing sheet forms an active material flow channel, and the flow dividing sheet is further provided with two grooves.

According to one embodiment of the present utility model, the lower surface is provided with N first channel boundaries and N second channel boundaries, one first channel boundary being disposed opposite to one second channel boundary and forming one active material channel; the grooves, the first flow channel boundary and the second flow channel boundary are provided with overlapping areas in the height direction;

wherein, the active material flowing out of the active material runner overlaps with the ceramic material flowing out of the ceramic runner at the overlapping area.

According to one embodiment of the utility model, the depth of the groove is 25% -50% of the thickness of the gasket body.

According to one embodiment of the utility model, the width of the overlap zone is 0.1mm-0.5mm.

According to one embodiment of the utility model, the opening of the groove is in the shape of an eight extending straight line or widening outwards.

According to one embodiment of the present utility model, the first channel boundary and the second channel boundary are symmetrically distributed.

The utility model has the beneficial effects that: the active material runner and the ceramic runner are respectively arranged on the lower surface and the upper surface of the gasket body, so that the active material runner and the ceramic runner form a height difference, and meanwhile, ceramic materials flowing out of the ceramic runner and active materials flowing out of the active material runner are partially overlapped or spliced with each other, so that gaps between the active materials and the ceramic materials can be avoided, the occurrence of foil leakage phenomenon is avoided, the risk of short circuit of the battery cell is reduced, and the rate of the coating process is guaranteed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is one of the perspective views of a gasket body;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view of FIG. 1 at B;

FIG. 4 is a second perspective view of the gasket body;

FIG. 5 is a front view of the gasket body;

FIG. 6 is a rear view of the gasket body;

FIG. 7 is a third perspective view of the gasket body;

FIG. 8 is another elevational view of the gasket body;

FIG. 9 is another rear view of the gasket body;

FIG. 10 is a perspective view of a gasket body;

FIG. 11 is an enlarged view of portion C of FIG. 10;

FIG. 12 is a fifth perspective view of the gasket body;

fig. 13 is a perspective view of the gasket body.

Reference numerals illustrate:

1-a gasket body; 11-upper surface; 12-lower surface; 121-a first flow path boundary; 122-a second flow path boundary; 13-active material flow channels; 14-ceramic flow channels; 15-an overlapping zone; 16-a first support sheet; 17-a second support sheet; 18-a third support sheet; 19-a diverter blade; 10-grooves; 100-active substance; 200-ceramic material; 300-overlap area.

Detailed Description

Various embodiments of the utility model are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the utility model. That is, in some embodiments of the utility model, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.

In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the utility model solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Example 1

As shown in fig. 1-3, fig. 1 is one of perspective views of a gasket body 1; FIG. 2 is an enlarged view of FIG. 1 at A; fig. 3 is an enlarged view at B in fig. 1. The coating gasket comprises a gasket body 1, wherein the gasket body 1 is provided with an upper surface 11 and a lower surface 12 which are opposite, the upper surface 11 is provided with a ceramic runner 14, the lower surface 12 is provided with an active material runner 13, both sides of the active material runner 13 are provided with the ceramic runner 14, the ceramic runner 14 and the active material runner 13 have a height difference, and meanwhile, the orthographic projection of an outflow opening of the ceramic runner 14 is overlapped with the orthographic projection part of the outflow opening of the active material runner 13, namely, an overlapped area 300 exists after the active material 100 flowing out of the active material runner 13 is coated with a ceramic material 200 flowing out of the ceramic runner 14.

The lower surface 12 of the gasket body 1 is provided with N first flow channel boundaries 121 and N second flow channel boundaries 122, wherein N is more than or equal to 1; a first channel boundary 121 is disposed at an opposite interval from a second channel boundary 122, and an active material flow channel 13 is formed between the first channel boundary 121 and the second channel boundary 122, and the active material 100 flows out through the active material flow channel 13. The upper surface 11 of the gasket body 1 is provided with 2N ceramic flow passages 14, one ceramic flow passage 14 is distributed on two sides of one active material flow passage 13, meanwhile, two ceramic flow passages 14 are respectively positioned at the upper parts of a first flow passage boundary 121 and a second flow passage boundary 122, an overlapping area 15 exists between one ceramic flow passage 14 and the first flow passage boundary 121 in the height direction, and an overlapping area 15 exists between the other ceramic flow passage 14 and the second flow passage boundary 122 in the height direction; when the active material flow channels 13 discharge the active material 100, the two ceramic flow channels 14 simultaneously discharge the ceramic material 200 on both sides of the active material 100, wherein the ceramic material 200 overlaps the active material 100 at the overlap region 15, i.e., the ceramic material 200 overlaps the active material 100.

In this embodiment, n=1, that is, the number of the first channel boundaries 121 and the second channel boundaries 122 is one, the number of the ceramic channels 14 is two, the gasket body 1 includes a first supporting plate 16, a second supporting plate 17 and a third supporting plate 18, one end of the first supporting plate 16 is connected with one end of the second supporting plate 17, the other end of the second supporting plate 17 is connected with one end of the third supporting plate 18, the other ends of the first supporting plate 16 and the third supporting plate 18 both extend along the direction parallel to the second supporting plate 17, and the two extend in opposite directions, the first channel boundaries 121 are set on the first supporting plate 16, the second channel boundaries 122 are set on the third supporting plate 18, and the ceramic channels 14 are set on the first supporting plate 16 and the third supporting plate 18. Further, the first support piece 16 and the third support piece 18 are provided with grooves 10, and the ceramic material 200 enters the grooves 10 and flows out along the opening direction of the grooves 10 to form ceramic runners 14. Specifically, the depth of the groove 10 is 25% -50% of the thickness of the gasket body 1. Furthermore, the end of the groove 10 (the outlet of the ceramic runner 14 or the opening of the groove 10 from which the ceramic material 200 flows) extends linearly or is widened outwards, and in this embodiment, an "eight" structure is selected, i.e. the width of the outlet of the ceramic material 200 is increased when the ceramic material 200 flows out of the ceramic runner 14, which is favorable for stable flowing out of the ceramic material 200 and improving the casting effect of the ceramic material 200. Specifically, the cross sections of the first support piece 16 and the third support piece 18 are in an L shape, and the first support piece 16 and the third support piece 18 are symmetrically arranged. The thickness of the first support piece 16, the second support piece 17 and the third support piece 18 is 0.5mm-1mm.

In particular, the first channel boundary 121 and the second channel boundary 122 have the same structure and are symmetrically distributed, that is, the coating width of the active material 100 is determined by the first channel boundary 121 and the second channel boundary 122, and the first channel boundary 121 and the second channel boundary 122 are respectively used as the boundaries of the width of the active material channel 13.

The width of the overlap region 15 in this embodiment is 0.1mm to 0.5mm, that is, the width where the active material 100 overlaps the ceramic material 200 is 0.1mm to 0.5mm.

Example two

As shown in fig. 4-6, fig. 4 is a second perspective view of the gasket body 1; fig. 5 is a front view of the gasket body 1; fig. 6 is a rear view of the gasket body 1. The present embodiment is basically the same as the first embodiment in structure, except that: when n=2, the gasket body 1 further includes a shunt piece 19, the shunt piece 19 is connected with the second support piece 17, and the shunt piece 19 is located between the first support piece 16 and the third support piece 18. Meanwhile, the two sides of the splitter 19 are provided with a first channel boundary 121 and a second channel boundary 122, wherein the first channel boundary 121 on the first support piece 16 and the second channel boundary 122 on the splitter 19 are combined to form an active material channel 13; the first channel boundary 121 on the splitter vane 19 combines with the second channel boundary 122 on the third support vane 18 to form another active material channel 13; the splitter 19 is further provided with two ceramic flow channels 14, and the two ceramic flow channels 14 discharge the ceramic material 200 to the two active material flow channels 13, respectively. By way of further illustration, by the arrangement of the flow splitter 19, the gasket body 1 can simultaneously discharge two active material flow channels 13 and simultaneously discharge the ceramic material 200 on both sides of the two active material flow channels 13.

Example III

As shown in fig. 7 to 9, fig. 7 is a third perspective view of the gasket body 1; fig. 8 is another front view of the gasket body 1; fig. 9 is another rear view of the gasket body 1. The present embodiment is basically the same as the second embodiment in structure, and differs in that: when n=3, the number of the splitter blades 19 is two, the two splitter blades 19 are connected with the second supporting blade 17, the two splitter blades 19 are distributed between the first supporting blade 16 and the third supporting blade 18 at intervals, and the two splitter blades 19, the first supporting blade 16 and the third supporting blade 18 are combined together to form three active material flow channels 13, so that synchronous coating of three active materials 100 can be realized.

Further, as can be seen from the description of the first to third embodiments, when the amount of the active material 100 is changed, the active material flow channels 13 and the ceramic flow channels 14 are also changed, and the increase of the flow splitter 19 is the key of the increase of the active material flow channels 13, so it can be seen from the above analysis that when N is equal to or greater than 2, the amount of the active material flow channels 13 is equal to or greater than two, and M flow splitter 19 is required to be added, wherein m=n-1.

In summary, the active material flow channel 13 and the ceramic flow channel 14 are respectively disposed on the lower surface 12 and the upper surface 11 of the gasket body 1, so as to form the overlapping region 15, so that the ceramic material 200 flowing out of the ceramic flow channel 14 overlaps the active material 100 flowing out of the active material flow channel 13, and thus, a gap between the active material 100 and the ceramic material 200 can be avoided, a foil leakage phenomenon is avoided, the risk of a short circuit of a battery cell is reduced, and the advantage rate of a coating process is ensured.

Example IV

As shown in fig. 10 and 11, fig. 10 is a perspective view of the gasket body 1; fig. 11 is an enlarged view of a portion C in fig. 10. The difference between the present embodiment and the first embodiment is that the first channel boundary 121 and the second channel boundary 122 are absent in the present embodiment, that is, one end of the first support sheet 16 and the third support sheet 18 extending towards each other is used as the width boundary of the active material channel 13, and at the same time, the opening of the groove 10 where the ceramic material 200 flows out extends towards the boundary of the active material channel 13, so that the flowing active material 100 and the ceramic material 200 are spliced with each other, and finally the occurrence of the phenomenon of foil exposure is avoided.

Example five

As shown in fig. 12, fig. 12 is a fifth perspective view of the gasket body 1. The structure of this embodiment is basically the same as that of the fourth embodiment, and the difference is that a splitter plate 19 is further added between the first support plate 16 and the third support plate 18, the splitter plate 19 is connected with the second support plate 18, the splitter plate 19 is added to increase the number of active substances 100 from one to two, the number of grooves 10 on the splitter plate 19 is two, one side of the opening of one groove 10 extends towards the direction close to the first support plate 16, and one side of the opening of the other groove 10 extends towards the direction close to the third support plate 18, so that the outflow ceramic material 200 is spliced with the active substances 100.

Example six

As shown in fig. 13, fig. 13 is a perspective view of the gasket body 1. The structure of the present embodiment is similar to that of the fifth embodiment, and the difference is that the number of the splitter blades 19 is two, the two splitter blades 19 are disposed on the second supporting plate 17 at intervals, and the specific structure of the splitter blade 19 is the same as that of the fifth embodiment and will not be described herein.

Further, the number of the flow dividing sheets 19 is not limited to one or two, and may be plural, and the number of the flow dividing sheets 19 may be spaced from the second supporting sheet 17, so that the specific number may be determined according to the actually required active material flow channels 13.

The foregoing description is only illustrative of the utility model and is not to be construed as limiting the utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present utility model, should be included in the scope of the claims of the present utility model.

Claims (10)

1. A coated gasket comprising: gasket body (1), it has upper surface (11) and lower surface (12), lower surface (12) are equipped with active material runner (13), upper surface (11) are equipped with ceramic runner (14), ceramic runner (14) are located the both sides of active material runner (13), the high height of the export of ceramic runner (14) is higher than the high of the export of active material runner (13), moreover the orthographic projection of the export of ceramic runner (14) with the orthographic projection part of the export of active material runner (13) overlaps or splices each other.

2. The coated gasket according to claim 1, characterized in that the upper surface (11) of the gasket body (1) is provided with grooves (10) forming the ceramic flow channels (14), the ceramic material flowing out of the grooves (10) being partially overlapped or spliced with the active substance flowing out of the active substance flow channels (13).

3. The coated gasket according to claim 2, characterized in that the gasket body (1) comprises a first support sheet (16), a second support sheet (17) and a third support sheet (18), the second support sheet (17) is connected with one end of the first support sheet (16) and one end of the third support sheet (18), respectively, the other end of the first support sheet (16) and the other end of the third support sheet (18) extend in a direction parallel to the second support sheet (17) and are arranged opposite to each other, and the first support sheet (16) and the third support sheet (18) are provided with the grooves (10).

4. A coated gasket according to claim 3, wherein the gasket body (1) further comprises M splitter blades (19), one end of the M splitter blades (19) being connected to the second support blade (17), the splitter blades (19) being located between the first support blade (16) and the third support blade (18); wherein M is more than or equal to 1.

5. The coated gasket according to claim 4, characterized in that the active substance flow channel (13) is formed between the first support sheet (16) and the third support sheet (18), or at least one of the flow dividing sheet (19) and the first support sheet (16), the flow dividing sheet (19) and the third support sheet (18), and the adjacent flow dividing sheet (19) forms the active substance flow channel (13), the flow dividing sheet (19) being further provided with two of the grooves (10).

6. The coated gasket of claim 4, wherein the lower surface (12) is provided with N first channel boundaries (121) and N second channel boundaries (122), one of the first channel boundaries (121) being disposed opposite one of the second channel boundaries (122) and forming one active material channel (13); -the recess (10) has a overlap zone (15) with the first (121) and second (122) flow channel boundaries in the height direction;

wherein the active substance flowing out of the active substance flow channel (13) and the ceramic material flowing out of the ceramic flow channel (14) are overlapped at the overlapping area (15).

7. A coated gasket according to any of claims 2-4, characterized in that the groove depth of the groove (10) is 25-50% of the thickness of the gasket body (1).

8. A coated gasket according to claim 6, characterized in that the overlap zone (15) has a width of 0.1mm-0.5mm.

9. A coated gasket according to any of claims 2-4, characterized in that the opening of the groove (10) is in the form of a straight extension or an outwardly widening "eight" shape.

10. The coated gasket of claim 6 wherein said first flow path boundary (121) and said second flow path boundary (122) are symmetrically distributed.