CN211350703U

CN211350703U - Cap structure of power type lithium battery

Info

Publication number: CN211350703U
Application number: CN201921835146.2U
Authority: CN
Inventors: 郑龙
Original assignee: Huizhou Yulong Technology Co ltd
Current assignee: Huizhou Yulong Technology Co ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-08-25
Anticipated expiration: 2029-10-29

Abstract

The utility model relates to the technical field of lithium batteries, and discloses a cap structure of a power type lithium battery, which comprises an upper cap body, a connecting sheet, a closed assembly and a protective film, wherein the connecting sheet is provided with a bent part and an annular straight edge part; the outer edges of the connecting pieces are compressed respectively through external equipment to form annular straight edge parts and bending parts, namely the bending parts completely wrap the first side surface and the second side surface of the upper cover body, and the outer edges of the connecting pieces are flat and have no radian, so that the assembly process replaces the assembly process of the upper cover body and the connecting pieces at the present stage, gaps exist at the connecting positions between the upper cover body and the connecting pieces, the airtightness of the cap structure is further improved, and meanwhile, the contact performance of the battery can also be improved.

Description

Cap structure of power type lithium battery

Technical Field

The utility model relates to a lithium cell technical field especially relates to a power type lithium cell's block structure.

Background

At present, the lithium power battery is a novel high-energy battery successfully developed in the 20 th century. The negative electrode of this battery is metallic lithium, and manganese dioxide or the like is used for the positive electrode. The 70 s were put into practical use. Because of its advantages of high energy, high battery voltage, wide working temp. range and long storage life, it has been widely used in military and civil small-sized electric appliances, such as mobile telephone, portable computer, video camera and camera, etc., and partially substituted for traditional battery. The high-capacity lithium battery has been tried in electric automobiles, will become one of the main power sources of the electric automobiles in the 21 st century, and will be applied to the aspects of artificial satellites, aerospace and energy storage.

However, the edge of the explosion-proof aluminum sheet of the cap structure of the power lithium battery at the present stage has a cambered surface, and when the steel cap is installed on the explosion-proof aluminum sheet, a gap exists between the steel cap and the explosion-proof aluminum sheet, so that the tightness of the battery is reduced, and the contact performance of the battery is also reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, provide a can improve the leakproofness of battery and can improve the contact performance's of battery power type lithium cell's block structure.

The purpose of the utility model is realized through the following technical scheme:

a cap structure for a lithium battery of the power type, comprising: the sealing assembly comprises a first rubber ring and a second rubber ring, a position avoiding cavity is formed in the first rubber ring, the upper cover body, the connecting sheet, the second rubber ring and the protective film are respectively accommodated in the position avoiding cavity, the upper cover body is arranged on the connecting sheet, the connecting sheet is arranged on the second rubber ring, and the protective film is arranged on the second rubber ring;

the connecting piece is provided with a bending part and an annular straight edge part, the bending part and the annular straight edge part are respectively arranged in the avoiding cavity, the upper cover body is provided with a first side face and a second side face, the bending part is tightly attached to the first side face of the upper cover body, the bending part and the first side face form a sealing area, the second side face of the upper cover body is tightly attached to the annular straight edge part, the annular straight edge part is tightly attached to the first rubber ring, and the central axis of the annular straight edge part coincides with the central axis of the bending part.

In one embodiment, the cover further comprises an arc-shaped protrusion, and the arc-shaped protrusion is arranged on the first side surface of the upper cover body.

In one embodiment, the arc-shaped protrusion is provided with a plurality of air release holes, and a space is respectively arranged between the air release holes.

In one embodiment, the central axis of the bent part coincides with the central axis of the upper cover body.

In one embodiment, the annular straight edge portion has a circular cross-section.

In one embodiment, the bend has a circular cross-section.

In one embodiment, a central axis of the annular straight edge portion coincides with a central axis of the upper cover body.

In one embodiment, the connecting piece is an explosion-proof aluminum sheet.

In one embodiment, the second rubber ring is provided with a plurality of mounting ports, the protective bottom sheet is provided with a plurality of clamping blocks, and the clamping blocks are respectively arranged in the mounting ports in a one-to-one correspondence manner.

In one embodiment, the first rubber ring has a circular cross-section.

The utility model discloses compare in prior art's advantage and beneficial effect as follows:

the utility model relates to a power type lithium cell's block structure, compress the outside edge of connection piece through outside equipment, form annular straight edge portion and the portion of bending, the portion of bending wraps up the first side and the second side of going up the lid completely promptly, and the outside edge of connection piece is level and smooth no radian, so, replaced on the present stage lid and connection piece assembly back, there is the clearance in the hookup location department of going up between lid and the connection piece, and then improved the seal of block structure, also can improve the contact performance of battery simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is an exploded view of a cap structure of a power lithium battery according to an embodiment of the present invention;

fig. 2 is an internal schematic view of a cap structure of a power lithium battery according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different 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.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In one embodiment, a cap structure for a lithium battery includes: the sealing assembly comprises a first rubber ring and a second rubber ring, a position avoiding cavity is formed in the first rubber ring, the upper cover body, the connecting sheet, the second rubber ring and the protective film are respectively accommodated in the position avoiding cavity, the upper cover body is arranged on the connecting sheet, the connecting sheet is arranged on the second rubber ring, and the protective film is arranged on the second rubber ring; the connecting piece is provided with a bending part and an annular straight edge part, the bending part and the annular straight edge part are respectively arranged in the position avoiding cavity, the upper cover body is provided with a first side face and a second side face, the bending part is tightly attached to the first side face, the bending part is formed into a sealing area with the first side face, the annular straight edge part is tightly attached to the first rubber ring, and the central axis of the annular straight edge part coincides with the central axis of the bending part. So, compress respectively the outside edge of connection piece through outside equipment, form annular straight edge portion and the portion of bending, the portion of bending is lived the first side and the second side of going up the lid and wraps up completely, and the outside edge of connection piece is levelly and smoothly not have the radian, so, replaced on the present stage after lid and connection piece assembly, there is the clearance in the hookup location department between last lid and the connection piece, and then improved the seal of block structure, also can improve the contact performance of battery simultaneously.

In order to better explain the cap structure of the power lithium battery, the concept of the cap structure of the power lithium battery is better understood. Referring to fig. 1, a cap structure 10 of a lithium battery includes: the upper cover body 100, the connecting sheet 200, the sealing assembly 300 and the protective bottom sheet 400 are respectively arranged on the sealing assembly 300.

Referring to fig. 1, the sealing assembly 300 includes a first rubber ring 310 and a second rubber ring 320, a position-avoiding cavity 311 is formed in the first rubber ring 310, the upper cover 100, the connecting sheet 200, the second rubber ring 320 and the protective bottom sheet 400 are respectively accommodated in the position-avoiding cavity 311, the upper cover 100 is disposed on the connecting sheet 200, the connecting sheet 200 is disposed on the second rubber ring 320, and the protective bottom sheet 400 is disposed on the second rubber ring 320; referring to fig. 2, the connecting sheet 200 is provided with a bent portion 210 and an annular straight edge portion 220, the bent portion 210 and the annular straight edge portion 220 are respectively disposed in the avoiding cavity 311, the upper cover body 100 has a first side surface 110 and a second side surface 120, the bent portion 210 is tightly attached to the first side surface 110 of the upper cover body 100, the bent portion 210 and the first side surface 110 form a sealing area 230, the second side surface 120 of the upper cover body 100 is tightly attached to the annular straight edge portion 220, the annular straight edge portion 220 is tightly attached to the first rubber ring 310, and a central axis of the annular straight edge portion 220 coincides with a central axis of the bent portion 210. Referring to fig. 1, specifically, the connecting sheet 200 is an explosion-proof aluminum sheet; the annular straight edge part 220 has a circular cross section, and the bent part 210 has a circular cross section; referring to fig. 1, more specifically, a central axis of the bending portion 210 coincides with a central axis of the upper cover 100; referring to fig. 1, more specifically, the central axis of the annular straight edge portion 220 coincides with the central axis of the upper cover body 100.

It should be noted that, the outer edge of the connecting sheet 200 is compressed by using an external device, so that the bending portion 210 completely wraps the first side surface 110 and the second side surface 120 of the upper cover body 100, and the outer edge of the connecting sheet 200 is flat and has no radian, and is parallel to the second side surface 120 of the upper cover body 100, that is, the annular straight edge portion 220 and the bending portion 210 in this application, and the central axis of the annular straight edge portion 220 coincides with the central axis of the bending portion 210. So, when assembling upper cover body 100 and connection piece 200, can make the laminating between upper cover body 100 and the connection piece 200 inseparabler, the clearance is zero, simultaneously, can improve the holistic seal of lithium cell to and the contact performance of lithium cell. Moreover, the appearance structure of the first rubber ring 310 is smooth and has no corners, and meanwhile, the second rubber ring 320 is exposed outside the first rubber ring 310 and is provided with convex angles, so that the tightness of the battery is better improved.

Referring to fig. 1, in a further embodiment, the cap structure 10 of the power lithium battery further includes an arc-shaped protrusion 500, and the arc-shaped protrusion 500 is disposed on the first side surface 110 of the upper cover 100. Referring to fig. 1, specifically, the arc protrusion 500 is provided with a plurality of air release holes 510, and a space is respectively disposed between the air release holes 510.

Referring to fig. 1, in one embodiment, a plurality of mounting openings 321 are formed in the second rubber ring 320, a plurality of clamping blocks 410 are disposed on the protective bottom sheet 400, and the clamping blocks 410 are disposed in the mounting openings 321 in a one-to-one correspondence manner. It should be noted that, by forming a plurality of mounting openings 321 and a plurality of clamping blocks 410, it is convenient for the protective bottom sheet 400 to be mounted on the second rubber ring 320.

Referring to fig. 1, further, in one embodiment, the first rubber ring 310 has a circular cross section. It should be noted that the avoiding cavity 311 formed in the first rubber ring 310 provides an installation space for the upper cover body 100, the connecting sheet 200, the second rubber ring 320, and the protective bottom sheet 400.

Compared with the prior art, the utility model has the advantages of it is following:

above-mentioned block structure 10 of power type lithium cell, compress the outside edge of connection piece 200 through outside equipment, form annular straight edge portion 220 and the portion of bending 210, the portion of bending 210 wraps up first side 110 and second side 120 of upper cover body 100 completely promptly, and the outside edge of connection piece 200 is level and smooth no radian, so, replaced upper cover body 100 and connection piece 200 assembly back at present stage, there is the clearance in the hookup location department between upper cover body 100 and the connection piece 200, and then improved the seal of block structure 10 of power type lithium cell, also can improve the contact performance of battery simultaneously.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A cap structure for a lithium battery of the power type, comprising: the sealing assembly comprises a first rubber ring and a second rubber ring, a position avoiding cavity is formed in the first rubber ring, the upper cover body, the connecting sheet, the second rubber ring and the protective film are respectively accommodated in the position avoiding cavity, the upper cover body is arranged on the connecting sheet, the connecting sheet is arranged on the second rubber ring, and the protective film is arranged on the second rubber ring;

2. The cap structure of a lithium kinetic cell of claim 1 further comprising an arcuate projection disposed on the first side of the upper cover.

3. The cap structure of a lithium battery according to claim 2, wherein the arc-shaped protrusion has a plurality of air release holes, and a space is provided between each air release hole.

4. The cap structure of a lithium secondary battery as claimed in claim 2, wherein a central axis of the bent portion coincides with a central axis of the upper cap body.

5. The cap structure of a lithium kinetic cell of claim 1 wherein the annular straight edge portion has a circular cross-section.

6. The capping structure for a lithium secondary battery according to claim 1, wherein the bent portion has a circular cross section.

7. The cap structure of a lithium secondary battery as claimed in claim 1, wherein a central axis of the annular straight edge portion coincides with a central axis of the upper cap body.

8. The cap structure of a lithium secondary battery according to claim 1, wherein the connecting piece is an explosion-proof aluminum sheet.

9. The cap structure of the dynamic lithium battery as claimed in claim 1, wherein the second rubber ring is provided with a plurality of mounting openings, the protective bottom sheet is provided with a plurality of clamping blocks, and the clamping blocks are respectively arranged in the mounting openings in a one-to-one correspondence manner.

10. The capping structure for a lithium kinetic cell of claim 1 wherein the first rubber ring has a circular cross-section.