CN219329320U - Cover plate assembly and battery - Google Patents

Abstract

The utility model relates to the technical field of batteries, and discloses a cover plate assembly and a battery; the cover plate component can comprise connecting pins, lower plastic and a cover plate which are sequentially stacked; at least one of the lower plastic and the connecting pin is provided with a bulge, and the bulge is abutted between the lower plastic and the connecting pin and/or the bulge is abutted between the lower plastic and the cover plate, so that the lower plastic is fixed between the connecting pin and the cover plate. The purpose of firmly fixing the lower plastic between the connecting pins and the cover plate is achieved by arranging the bulges, so that the reliability of the battery is effectively ensured; and the whole structure is simple, the processing technology is simple, the realization is easy, and the cost of the battery is reduced.

Description

Cover plate assembly and battery

Technical Field

The disclosure relates to the technical field of batteries, in particular to a cover plate assembly and a battery comprising the same.

Background

Green and efficient secondary batteries are being developed greatly. The lithium ion battery as a novel secondary battery has the advantages of high energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large energy storage, electric traffic power sources and the like.

However, the lower plastic in the current battery is not firmly fixed.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure aims to overcome the disadvantage of weak fixation of the lower plastic in the above related art, and provide a cover plate assembly with relatively firm fixation of the lower plastic and a battery including the cover plate assembly.

According to one aspect of the present disclosure, there is provided a cap plate assembly including: the connecting pins, the lower plastic and the cover plate are sequentially stacked; at least one of the lower plastic and the connecting pins is provided with a bulge, the bulge is abutted between the lower plastic and the connecting pin, and/or the bulge is abutted between the lower plastic and the cover plate, so that the lower plastic is fixed between the connecting pin and the cover plate.

When the protrusions are abutted between the lower plastic and the connecting pins, one surface of the lower plastic, which is close to the cover plate, is also abutted with the cover plate; when the bulge is abutted between the lower plastic and the cover plate, one surface of the lower plastic, which is close to the connecting pin, is also abutted with the connecting pin; thereby the lower plastic is fixed between the connecting pin and the cover plate. When the bulge is abutted between the lower plastic and the connecting pin and the bulge is also abutted between the lower plastic and the cover plate, the lower plastic is fixed between the connecting pin and the cover plate. The purpose that the lower plastic is firmly fixed between the connecting pin and the cover plate is achieved through the arrangement of the protrusions, the whole structure is simple, the processing technology is simple, and the implementation is easy.

According to another aspect of the present disclosure, there is provided a battery including: the cover plate assembly is described above.

When the bulge is abutted between the lower plastic and the connecting pin, one surface of the lower plastic, which is close to the cover plate, is also abutted with the cover plate; when the bulge is abutted between the lower plastic and the cover plate, one surface of the lower plastic, which is close to the connecting pin, is also abutted with the connecting pin; thereby the lower plastic is fixed between the connecting pin and the cover plate. When the bulge is abutted between the lower plastic and the connecting pin and the bulge is also abutted between the lower plastic and the cover plate, the lower plastic is fixed between the connecting pin and the cover plate. The purpose of firmly fixing the lower plastic between the connecting pins and the cover plate is achieved by arranging the bulges, so that the reliability of the battery is effectively ensured; and the whole structure is simple, the processing technology is simple, the realization is easy, and the cost of the battery is reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic structural view of an example embodiment of a battery of the present disclosure.

Fig. 2 is a schematic perspective view of the battery post, the cover plate, the lower plastic and the connection pins of fig. 1, which are matched to form a cover plate assembly.

Fig. 3 is a schematic partial cross-sectional view of an example embodiment of fig. 2.

Fig. 4 is a schematic perspective view of the lower plastic in fig. 3.

Fig. 5 is a schematic partial cross-sectional view of another example embodiment of fig. 2.

Fig. 6 is a schematic partial cross-sectional view of yet another example embodiment of fig. 2.

Fig. 7 is a schematic perspective view of the connection pin in fig. 6.

FIG. 8 is a schematic partial cross-sectional view of an example embodiment of a lower plastic mated with a cover plate.

FIG. 9 is a schematic partial cross-sectional view of another example embodiment of a lower plastic mated with a cover plate.

FIG. 10 is a partial cross-sectional schematic view of an example embodiment of a two-part mating of the lower plastic.

Reference numerals illustrate:

1. a cover plate; 11. a body portion; 111. a second through hole; 112. a first concave portion; 12. a first flanging; 13. a second flanging;

2. lower plastic; 21. a first projection; 22. a first portion; 221. a through hole; 222. a second concave portion; 23. a second portion; 231. a second projection; 24. a first through hole;

3. a battery post; 31. a pole body; 32. a flange structure;

4. a connection pin; 41. a first connection plate; 42. a second connecting plate; 43. a third through hole;

5. a protrusion; 51. a first protrusion; 52. a second protrusion; 53. a third protrusion;

6. a seal ring; 7. an insulating member;

81. a battery cell; 82. a battery case; 83. a cell protective film;

x, a first direction; y, second direction.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

The terms "a," "an," "the," "said" and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and do not limit the number of their objects.

In the present application, unless explicitly specified and limited otherwise, the term "coupled" is to be construed broadly, and for example, "coupled" may be either fixedly coupled, detachably coupled, or integrally formed; can be directly connected or indirectly connected through an intermediate medium. "and/or" is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The exemplary embodiment of the present disclosure provides a cover plate assembly, as shown with reference to fig. 1 to 10, which includes a connection pin 4, a lower plastic 2, and a cover plate 1 that are sequentially stacked; at least one of the lower plastic 2 and the connecting pin 4 is provided with a bulge 5, the bulge 5 is abutted between the lower plastic 2 and the connecting pin 4, and/or the bulge 5 is abutted between the lower plastic 2 and the cover plate 1, so that the lower plastic 2 is fixed between the connecting pin 4 and the cover plate 1.

Based on the same inventive concept, example embodiments of the present disclosure provide a battery that may include a cap plate assembly as described in any one of the following.

When the protrusion 5 is abutted between the lower plastic 2 and the connecting pin 4, one surface of the lower plastic 2, which is close to the cover plate 1, is also abutted with the cover plate 1; when the bulge 5 is abutted between the lower plastic 2 and the cover plate 1, one surface of the lower plastic 2, which is close to the connecting pin 4, is also abutted with the connecting pin 4; so that the lower plastic 2 is fixed between the connection pins 4 and the cover plate 1. When the protrusion 5 is abutted between the lower plastic 2 and the connection pin 4, and the protrusion 5 is also abutted between the lower plastic 2 and the cover plate 1, the lower plastic 2 is fixed between the connection pin 4 and the cover plate 1. The purpose of firmly fixing the lower plastic 2 between the connecting pin 4 and the cover plate 1 is achieved by arranging the bulge 5, so that the reliability of the battery is effectively ensured; and the whole structure is simple, the processing technology is simple, the realization is easy, and the cost of the battery is reduced.

It should be noted that, the first direction X and the second direction Y are parallel to the surface of the lower plastic 2 near the cover plate 1, and the first direction X intersects with the second direction Y, for example, the first direction X is perpendicular to the second direction Y.

The two parts are in abutting connection, namely the two parts are connected, and the action of force exists between the two parts, namely the abutting connection represents the state of acting force.

In the present exemplary embodiment, referring to fig. 1, a battery may include a battery case 82, a battery cell 81, and a cap plate assembly, etc.

The battery may be configured in a rectangular parallelepiped shape, and correspondingly, the battery case 82 may be configured in a rectangular parallelepiped shape, and the battery case 82 may specifically include a bottom surface, two first side surfaces, and two second side surfaces, where the width of the first side surfaces is smaller than the width of the second side surfaces; the two first side surfaces and the two second side surfaces are connected end to end and surround to form a cuboid cylinder; the bottom surface is connected to one side of the two first side surfaces and the two second side surfaces. The bottom surface, the two first side surfaces and the two second side surfaces surround to form a containing cavity. Of course, in other exemplary embodiments of the present disclosure, the battery case 82 may be configured in various structures such as a cylinder, a prism, a truncated cone, and the like, as needed, which are not described herein. The material of the battery case 82 may be aluminum alloy, but may be other materials, which are not described here.

In the present exemplary embodiment, the battery cell 81 is provided in the accommodation chamber of the battery case 82, and the battery cell 81 is provided as a rectangular parallelepiped that is adapted to the battery case 82. A cell protective film 83 is provided outside the cell 81, and the cell protective film 83 is provided in a rectangular parallelepiped shape adapted to the cell 81.

The cover plate assembly is arranged on one side, deviating from the bottom surface, of the battery cell 81, and comprises a connecting pin 4, a lower plastic 2 and a cover plate 1, wherein the connecting pin 4 is arranged on one side, deviating from the bottom surface, of the battery cell 81, the lower plastic 2 is arranged on one side, deviating from the battery cell 81, of the connecting pin 4, the cover plate 1 is arranged on one side, deviating from the connecting pin 4, of the lower plastic 2, and the cover plate 1 and the connecting pin 4 can be insulated and isolated through the lower plastic 2.

Furthermore, the number of the connection pins 4 is two, and the two connection pins 4 are located at both ends of the cell 81 in the first direction X in one-to-one correspondence.

Referring to fig. 1, 2, 3, 6 and 7, the connection pin 4 is provided in a bent structure, i.e., the connection pin 4 may include a first connection plate 41 and a second connection plate 42, and the first connection plate 41 is disposed perpendicular to the second connection plate 42. The first connecting plate 41 is positioned on one side of the battery cell 81 away from the bottom surface; the second connection plate 42 is connected to one end of the first connection plate 41 in the first direction X, and the second connection plate 42 is located on a side of the battery cell 81 near the first side surface.

The third through hole 43 is disposed on the connection pin 4, specifically, the third through hole 43 is disposed on the first connection plate 41, the hole wall of the third through hole 43 may be stepped, and the diameter of the end portion of the third through hole 43 close to the battery cell 81 is larger than the diameter of the end portion deviating from the battery cell 81.

The lower plastic 2 extends from one end of the cell 81 in the first direction X to the other end, i.e. the lower plastic 2 covers the first connection plates 41 of the two connection pins 4 and the cell 81 not covered by the connection pins 4. First through holes 24 are provided at both ends of the lower plastic 2 in the first direction X.

The cover plate 1 also extends from one end of the cell 81 in the first direction X to the other end, i.e. the cover plate 1 substantially completely covers the lower plastic 2, so that the lower plastic 2 functions to insulate the connection pins 4 from the cover plate 1. A second through hole 111 is provided in the cover plate 1. The second through hole 111 is connected to the first through hole 24, and the second through hole 111 and the first through hole 24 are disposed substantially coaxially.

Referring to fig. 3 and 6, the battery post 3 may include a post body 31 and a flange structure 32, the flange structure 32 being provided at the outer circumference of the post body 31. The battery post 3 penetrates through the first through hole 24 and the second through hole 111 and is connected with the connection pin 4, specifically, the post body 31 penetrates through the first through hole 24 and the second through hole 111, one end, close to the connection pin 4, of the post body 31 is provided with a riveting structure, the riveting structure stretches into the third through hole 43, fixed connection between the battery post 3 and the connection pin 4 is achieved through riveting, the riveting structure is riveted on the step surface of the third through hole 43, and the battery post 3 is prevented from protruding out of the connection pin 4 towards one side of the battery core 81. Of course, in other example embodiments of the present disclosure, the third through hole 43 may be provided as the through hole 221, and the battery post 3 may penetrate to a side of the connection pin 4 near the battery cell 81 and be riveted.

Referring to fig. 3 and 6, the cover plate 1 may include a body portion 11, a first flanging 12, and a second flanging 13; the body 11 may be provided in a flat plate shape, and the second through hole 111 is provided in the body 11. The flange structure 32 is provided on the side of the body portion 11 facing away from the connection pins 4.

The first flanging 12 is connected to the body 11, and the first flanging 12 is perpendicular to the body 11, and the first flanging 12 is located at a side of the flange structure 32 away from the pole body 31, i.e. the first flanging 12 is cylindrical and surrounds the periphery of the flange structure 32.

The second flanging edge 13 is connected to one side of the first flanging edge 12, which is away from the body portion 11, and the second flanging edge 13 is arranged in parallel with the body portion 11, the second flanging edge 13 is arranged in a ring shape, and the second flanging edge 13 is pressed on one side of the flange structure 32, which is away from the connecting pin 4.

The second flanging edge 13 and the first flanging edge 12 form a flanging structure, the flange structure 32 is fixed with the cover plate 1, and therefore the battery pole 3 is fixed with the cover plate 1, and the battery pole 3 is simple in fixed structure and high in reliability. However, this results in the lower plastic 2 not being well fixed.

Since the battery post 3 is to be energized, an insulating arrangement is required between the battery post 3 and the cover plate 1, and an insulating member 7 is provided between the cover plate 1 and the battery post 3. Specifically, the insulating member 7 may include two parts, one part of the insulating member 7 is disposed between the flange structure 32 and the first and second turnup edges 12 and 13, the other part of the insulating member 7 is disposed between the post body 31 and the body portion 11, and the sealing ring 6 is further disposed between the two parts of the insulating member 7.

In the present exemplary embodiment, referring to fig. 3 and 4, the protrusion 5 may include a first protrusion 51, the first protrusion 51 being disposed on the lower plastic 2 and protruding toward the connection pin 4 side; that is, the first protrusion 51 protruding toward the connection pin 4 is provided on the lower plastic 2, the first protrusion 51 is abutted against the connection pin 4, and the surface of the lower plastic 2 close to the cap plate 1 is abutted against the cap plate 1, so that the lower plastic 2 is fixed between the connection pin 4 and the cap plate 1 after the battery post 3 is mounted on the cap plate 1. The surface of the first protrusion 51 abutting against the connection pin 4 may be a plane surface.

The cross-sectional shape of the first protrusion 51 parallel to the side of the lower plastic 2 near the connection pin 4 may be a circle, a rectangle, an ellipse, or the like, as desired. The number of the first protrusions 51 may be set to two, and the two first protrusions 51 may be symmetrically disposed in the second direction Y. The shape and number of the first protrusions 51 may be set as required, and are not described in detail herein.

Referring to fig. 5, the protrusion 5 may further include a second protrusion 52, the second protrusion 52 being provided on the lower plastic 2 and protruding toward the cover plate 1 side; that is, the second protrusion 52 protruding toward the cover plate 1 side is provided on the lower plastic 2, the second protrusion 52 abuts against the cover plate 1, and the surface of the lower plastic 2 near the connection pin 4 abuts against the connection pin 4, so that the lower plastic 2 is fixed between the connection pin 4 and the cover plate 1 after the battery post 3 is mounted on the cover plate 1. The surface of the second protrusion 52 abutting against the cover plate 1 may be a flat surface.

The cross-sectional shape of the second protrusion 52 parallel to the side of the lower plastic 2 near the cover plate 1 may be a circle, a rectangle, an ellipse, etc. in various desired shapes. The number of the second protrusions 52 may be two, and the two second protrusions 52 may be symmetrically disposed in the second direction Y. The shape and number of the second protrusions 52 may be set as required, and are not described in detail herein.

It should be noted that, referring to fig. 5, the first protrusion 51 and the second protrusion 52 may be disposed on the lower plastic 2 at the same time; it is also possible to provide only the first protrusions 51 on the lower plastic 2 without providing the second protrusions 52; it is also possible to provide only the second protrusions 52 on the lower plastic 2 without providing the first protrusions 51.

Referring to fig. 6 and 7, the protrusion 5 may further include a third protrusion 53, the third protrusion 53 being provided on the connection pin 4 and protruding downward from the plastic 2; that is, the connection pin 4 is provided with a third protrusion 53 protruding toward the lower plastic 2 side, the third protrusion 53 abuts against the lower plastic 2, and the side of the lower plastic 2 close to the cap plate 1 abuts against the cap plate 1, so that the lower plastic 2 is fixed between the connection pin 4 and the cap plate 1 after the battery post 3 is mounted on the cap plate 1. The surface of the third protrusion 53 abutting against the lower plastic 2 may be a plane.

The third protrusion 53 may be a bent portion provided on the connection pin 4, that is, the connection pin 4 is bent toward the side close to the lower plastic 2 to form the third protrusion 53, a cross-sectional shape of the third protrusion 53 parallel to a side of the lower plastic 2 close to the cover plate 1 may be rectangular, and a length of the third protrusion 53 in the second direction Y is equal to a width of the connection pin 4 in the second direction Y. Of course, the third protrusions 53 may be formed by punching the connection pins 4 from the side close to the battery cell 81, and the shape and number of the third protrusions 53 may be set as required, which is not described in detail herein.

It should be noted that the first protrusion 51, the second protrusion 52, and the third protrusion 53 may be provided on one battery at the same time; only two of the first protrusion 51, the second protrusion 52, and the third protrusion 53 may be provided on one battery; it is also possible to provide only one of the first protrusion 51, the second protrusion 52, and the third protrusion 53 on one battery.

The above description has been made of a specific structure in which the fixation of both end portions of the lower plastic 2 in the first direction X is achieved by one, two or three of the first protrusion 51, the second protrusion 52 and the third protrusion 53.

However, in the case where the length of the battery in the first direction X is long, the middle portion of the lower plastic 2 is easily bent by its own weight.

In order to solve the above-mentioned technical problem, in the present exemplary embodiment, referring to fig. 8, the middle portion of the lower plastic 2 may be fixedly connected to the cover plate 1, specifically, a first recess 112 may be provided on the cover plate 1, a first protrusion 21 protruding toward the cover plate 1 may be provided on the middle portion of the lower plastic 2, the first protrusion 21 is engaged in the first recess 112, for example, the first protrusion 21 may be inserted through a through hole 221 on the first portion 22 and then be interference-fit in the first recess 112, and of course, a fastening structure may also be provided to implement the engagement of the first protrusion 21 and the first recess 112; the middle part of the lower plastic 2 is fixedly connected with the cover plate 1 through the interference fit of the first protruding part 21 and the first recessed part 112, so that the middle part of the lower plastic 2 is prevented from being easily bent due to dead weight.

Moreover, the depth of the first concave portion 112 is greater than or equal to the height of the first convex portion 21, so that the first convex portion 21 can be completely matched in the first concave portion 112, a gap is avoided from being formed between the lower plastic 2 and the cover plate 1, and the height of the battery is prevented from being increased.

It should be noted that the middle portion of the lower plastic 2 is not the middle, but the portion near the middle, for example, the lower plastic 2 may be divided into three portions in the first direction X, each portion accounting for about one third, and the middle third is considered as the middle portion of the lower plastic 2. Of course, other dividing methods are also possible, and will not be described in detail herein.

However, the length of the lower plastic 2 in the first direction X is greater than the width of the lower plastic 2 in the second direction Y, i.e., the longer length of the lower plastic 2 in the first direction X results in greater difficulty in preparation and is prone to defective products; and the transportation and assembly processes are also difficult. To solve this technical problem, in some example embodiments of the present disclosure, the lower plastic 2 may be separately provided.

Specifically, referring to fig. 9, the lower plastic 2 may include a first portion 22 and a second portion 23, and the first portion 22 is provided with a through hole 221. The first portion 22 and the second portion 23 overlap each other in the first direction X, i.e. a part of the second portion 23 is provided on one side of the first portion 22 in the first direction X, and another part of the second portion 23 is provided in a stack with a part of the first portion 22 such that another part of the second portion 23 is located on the side of the first portion 22 facing away from the cover plate 1. The lengths of the first part 22 and the second part 23 in the first direction X are shorter, the preparation difficulty is smaller, defective products are not easy to occur, and the transportation and assembly processes are easier.

The second portion 23 is provided with the first protruding portion 21, and the first protruding portion 21 penetrates through the through hole 221 in the first portion 22 and then is engaged in the first recess 112, for example, the first protruding portion 21 may be interference fit in the first recess 112 after penetrating through the through hole 221 in the first portion 22, and of course, a fastening structure may also be provided to achieve engagement between the first protruding portion 21 and the first recess 112; the second part 23 is fixedly connected with the cover plate 1 through the clamping of the first protruding part 21 and the first concave part 112, and the first part 22 is also fixedly connected with the cover plate 1, so that the middle part of the lower plastic 2 is prevented from being easily bent due to dead weight.

Moreover, the sum of the depth of the first recess 112 and the depth of the through hole 221 is greater than or equal to the height of the first protrusion 21, so that the first protrusion 21 can be completely matched in the first recess 112 and the through hole 221, thereby avoiding forming a gap between the first portion 22, the second portion 23 and the cover plate 1 and avoiding increasing the height of the battery.

The first concave portion 112 may be provided in a circular shape, a rectangular shape, an elliptical shape, or a ring shape, etc., and correspondingly, the first convex portion 21 may be provided in a circular shape, a rectangular shape, an elliptical shape, or a ring shape, etc., which are adapted to the first concave portion 112.

In other exemplary embodiments of the present disclosure, referring to fig. 10, the lower plastic 2 may include a first portion 22 and a second portion 23, where the first portion 22 and the second portion 23 overlap each other in the first direction X, and the specific structure of the overlapping has been described above and will not be repeated herein.

The first portion 22 and the second portion 23 may be fixedly connected, specifically, a second recess 222 is provided at an end of the first portion 22 near the second portion 23, a second protrusion 231 is provided at an end of the second portion 23 near the first portion 22, the second protrusion 231 protrudes toward the first portion 22, and the second protrusion 231 is engaged with the second recess 222, for example, the second protrusion 231 may be interference fit with the second recess 222, or of course, a fastening structure may be provided to implement engagement of the second protrusion 231 and the second recess 222; the first portion 22 and the second portion 23 may be fixedly coupled by an interference fit of the second protrusion 231 and the second recess 222.

Moreover, the depth of the second concave portion 222 is greater than or equal to the height of the second convex portion 231, so that the second convex portion 231 can be completely matched in the second concave portion 222, a gap is avoided between the first portion 22 and the second portion 23, and the height of the battery is prevented from being increased.

The second recess 222 may be provided in a circular shape, a rectangular shape, an oval shape, or a ring shape, etc., and correspondingly, the second protrusion 231 may be provided in a circular shape, a rectangular shape, an oval shape, or a ring shape, etc., which is adapted to the second recess 222.

Of course, in other example embodiments of the present disclosure, the first portion 22 and the second portion 23 may not be fixedly connected, as long as the first portion 22 and the second portion 23 are arranged along the first direction, and a surface of the first portion 22 adjacent to the second portion 23 and a surface of the second portion 23 adjacent to the first portion 22 are in contact with each other, i.e., a portion where the first portion 22 and the second portion 23 do not overlap.

The fixing manner of the lower plastic 2 to the cover plate 1 is not limited to the above description, and in still other exemplary embodiments of the present disclosure, in the case where the lower plastic 2 includes the first portion 22 and the second portion 23, a welding fixing portion is provided between an end of the first portion 22 adjacent to the second portion 23 and an end of the second portion 23 adjacent to the first portion 22 and the cover plate 1, and the welding fixing portion may be formed by ultrasonic welding or laser welding, that is, an end of the first portion 22 adjacent to the second portion 23 may be fixedly connected to the cover plate 1 by ultrasonic welding or laser welding, and an end of the second portion 23 adjacent to the first portion 22 may also be fixedly connected to the cover plate 1 by ultrasonic welding or laser welding.

A snap-fit arrangement is provided between the end of the first portion 22 adjacent the second portion 23 and the end of the second portion 23 adjacent the first portion 22 and the cover plate 1. Specifically, at least two first raised strips can be arranged on one surface of the cover plate 1 close to the lower plastic 2, and the surface of the first raised strips, which is far away from each other, is provided with an inclined surface, namely the section shape of the first raised strips can be a right trapezoid, and the upper bottom edge of the shorter right trapezoid is closer to the cover plate 1; at least two second bosses are also arranged on one surface of the first part 22 close to the cover plate 1, and the surfaces of the second bosses close to each other are inclined planes, namely, the section shape of the second raised strips can be right trapezoid, and the upper bottom edge of the shorter right trapezoid is closer to the first part 22. When the first part 22 is mounted on the cover plate 1, the two second bosses are clamped with the two first bosses, and the inclined planes of the second bosses are attached to the inclined planes of the first bosses, so that the first part 22 is fixedly connected with the cover plate 1.

Similarly, the number of the first raised strips is at least four, two of which are fixedly connected with the first portion 22, and the other two of which are fixedly connected with the second portion 23. At least two third bosses are also arranged on one surface of the second part 23 close to the cover plate 1, and the surfaces of the third bosses close to each other are inclined planes, namely, the section shape of the third raised strips can be right trapezoid, and the upper bottom edge of the shorter right trapezoid is closer to the second part 23. When the second part 23 is mounted on the cover plate 1, the two third bosses are clamped with the two first bosses, and the inclined planes of the third bosses are attached to the inclined planes of the first bosses, so that the second part 23 is fixedly connected with the cover plate 1.

The references to "parallel", "perpendicular" in this application are not entirely parallel, perpendicular, but rather are to some degree of error; for example, the included angle between the two is greater than or equal to 0 ° and less than or equal to 5 °, i.e. the two are considered to be parallel to each other; the included angle between the two is more than or equal to 85 degrees and less than or equal to 95 degrees, namely the two are considered to be mutually perpendicular.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (12)

1. A cover plate assembly, comprising: the connecting pins, the lower plastic and the cover plate are sequentially stacked; at least one of the lower plastic and the connecting pins is provided with a bulge, the bulge is abutted between the lower plastic and the connecting pin, and/or the bulge is abutted between the lower plastic and the cover plate, so that the lower plastic is fixed between the connecting pin and the cover plate.

2. The cover plate assembly of claim 1, wherein the protrusion comprises:

the first bulge is arranged on the lower plastic body and protrudes to one side of the connecting pin, and the first bulge is abutted with the connecting pin; and/or

The second bulge is arranged on the lower plastic and protrudes towards one side of the cover plate, and the second bulge is abutted with the cover plate.

3. The cover plate assembly of claim 1, wherein the boss further comprises:

and the third bulge is arranged on the connecting pin and protrudes towards the lower plastic, and the third bulge is in butt joint with the lower plastic.

4. A cover plate assembly according to any one of claims 1 to 3, wherein the length of the lower plastic in a first direction is greater than the width of the lower plastic in a second direction, the length of the cover plate in the first direction is greater than the width of the cover plate in the second direction, two connecting pins are provided, two connecting pins are positioned at two ends of the lower plastic in the first direction, the protrusions are positioned at two ends of the lower plastic in the first direction, the first direction and the second direction are parallel to a surface of the lower plastic close to the cover plate, and the first direction intersects the second direction.

5. The cover assembly of claim 4, wherein the lower plastic middle portion is fixedly connected to the cover.

6. The cover plate assembly according to claim 5, wherein a first concave portion is formed in the cover plate, a first protruding portion protruding toward the cover plate is formed in a middle portion of the lower plastic, and the first protruding portion is clamped in the first concave portion.

7. The cover assembly of claim 6, wherein the lower plastic comprises:

a first portion having a through hole provided thereon;

the second part is arranged in the first direction with the first part and is mutually overlapped, the first protruding part is arranged on the second part, and the first protruding part penetrates through the through hole and then is clamped in the first concave part.

8. The cover assembly of claim 4, wherein the lower plastic comprises a first portion and a second portion arranged in the first direction, and wherein the first portion and the second portion overlap each other; the end part of the first part, which is close to the second part, is provided with a second concave part, the end part of the second part, which is close to the first part, is provided with a second convex part, and the second convex part is clamped in the second concave part.

9. The cover plate assembly of claim 4, wherein the lower plastic comprises a first portion and a second portion arranged along the first direction, wherein a welded fixing part is arranged between an end of the first portion close to the second portion and an end of the second portion close to the first portion and the cover plate, or wherein a buckling fixing structure is arranged between an end of the first portion close to the second portion and an end of the second portion close to the first portion and the cover plate.

10. The cover plate assembly of claim 1, wherein the lower plastic is provided with a first through hole, the cover plate is provided with a second through hole, the second through hole is communicated to the first through hole, the cover plate assembly further comprises:

the battery pole penetrates through the first through hole and the second through hole and is connected with the connecting pin, the battery pole comprises a pole body and a flange structure, and the flange structure is arranged on the periphery of the pole body;

and the insulating piece is arranged between the cover plate and the battery pole.

11. The cover plate assembly of claim 10, wherein the cover plate comprises:

the flange structure is arranged on one side of the body part, which is away from the connecting pin;

the first turnover edge is connected with the body part and is perpendicular to the body part, and the first turnover edge is positioned at one side of the flange structure, which is away from the pole body;

the second turnover edge is connected to one side, deviating from the body portion, of the first turnover edge and is arranged in parallel with the body portion, and the second turnover edge is pressed on one side, deviating from the connecting pins, of the flange structure.

12. A battery, comprising: the closure assembly of any one of claims 1 to 11.

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