CN218448172U

CN218448172U - Lithium battery cap and lithium battery

Info

Publication number: CN218448172U
Application number: CN202221441973.5U
Authority: CN
Inventors: 边映枚; 郭小真; 黎文达
Original assignee: Guangdong Pow Tech New Power Co ltd
Current assignee: Guangdong Pow Tech New Power Co ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2023-02-03
Anticipated expiration: 2032-06-07

Abstract

The utility model discloses a lithium battery cap and a lithium battery, which comprises a cover body bottom plate and a cap cover body, wherein the cover body bottom plate is integrally formed with the positive electrode of a battery cell body, the cap cover body covers the periphery of the cover body bottom plate, and a plurality of sunken slotted holes are formed in the cover body bottom plate; the nut cap cover body comprises a plastic support, a buckle structure matched with the slotted hole is arranged on one surface of the cover body bottom plate, which faces the cover body bottom plate, and the plastic support is connected and fixed on the cover body bottom plate through the buckle structure and the slotted hole buckle. The clamping structure of the plastic support is clamped with the sunken slot hole, so that the dislocation rate of assembly is reduced, the assembly stability is improved, and the production efficiency is improved.

Description

Lithium battery cap and lithium battery

Technical Field

The utility model relates to a positive block technical field of battery especially relates to a lithium cell block and lithium cell.

Background

With the development of microelectronic technology, the increasing number of miniaturized devices has put forward higher requirements on power supplies, wherein lithium batteries are widely used as power supplies of integrated circuits due to the characteristics of light weight, high capacity, long service life and the like.

Particularly 18650 lithium batteries and 21700 lithium batteries, 18650 batteries are the nose of lithium ion batteries-a standard lithium ion battery model number as determined by the son corporation of japan for cost savings in the year, where 18 represents a diameter of 18mm,65 represents a length of 65mm, and 0 represents a cylindrical battery. 21700 cells means cylindrical cells with an outer diameter of 21mm and a height of 70.0 mm. The appearance of the battery cap structure is similar to that of the battery cap structure, the battery cap structure of the two batteries serves as an important component of a lithium battery and serves as a positive conductive terminal, a safety valve and the like in the lithium battery, and meanwhile, the battery sealing function is provided, so that the battery has good explosion-proof performance. At present, the plastic part of the commonly adopted battery core cap structure is directly attached to the battery core, and the assembly dislocation and the firmness are easy.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a lithium cell block and lithium cell for reduce the dislocation rate of assembly and improve the assembly steadiness, improve production efficiency.

In view of the above, an embodiment of the present invention provides a lithium battery cap, including a cover bottom plate integrally formed with a positive electrode of the battery cell body, and a cap cover covering the periphery of the cover bottom plate, wherein the cover bottom plate is provided with a plurality of sunken slots;

the nut cap cover body comprises a plastic support, a buckle structure matched with the slotted hole is arranged on one surface of the cover body bottom plate, which faces the cover body bottom plate, and the plastic support is connected and fixed on the cover body bottom plate through the buckle structure and the slotted hole buckle.

Furthermore, the middle position of plastic support is equipped with first through-hole, buckle structure sets up on the periphery border of first through-hole.

Furthermore, the plastic support faces towards one side of the cover body bottom plate and is fixed with the nickel sheet buckle, and the nickel sheet is abutted against the cover body bottom plate.

Furthermore, the plastic support is provided with a mounting groove in the side away from the cover body bottom plate, a protection plate is fixed in the mounting groove and comprises a base plate and an upward convex fixing column arranged in the middle of the base plate.

Furthermore, a cap rubber sleeve is sleeved outside the fixing column.

Furthermore, the steel cover further comprises a steel cover, a containing cavity is arranged in the steel cover, a second through hole is formed in the middle of the steel cover, and the periphery of the cover body bottom plate is sleeved with the steel cover.

Further, the fixing column extends out of the second through hole; the containing cavity is internally sleeved with the cap rubber sleeve, the protective plate, the plastic support, the nickel sheet and the cover body bottom plate.

In addition, a lithium battery is provided, which comprises the lithium battery cap.

Further, a steel sheet is arranged at the negative pole of the battery cell body.

Furthermore, the battery cover is further included, and the battery cover is sleeved outside the battery core body and the cover cap body.

The utility model has the advantages that: the embodiment of the utility model provides a lithium battery cap and lithium battery, including with the positive pole of electricity core body integrated into one piece the lid bottom plate and cover at the block lid of lid bottom plate periphery, set up a plurality of sunken slotted holes on the lid bottom plate; the nut cap cover body comprises a plastic support, a buckle structure matched with the slotted hole is arranged on one surface of the cover body bottom plate, and the plastic support is fixedly connected to the cover body bottom plate through the buckle structure and the slotted hole buckle. The clamping structure of the plastic support is clamped with the sunken slot hole, so that the dislocation rate of assembly is reduced, the assembly stability is improved, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is an assembly exploded view of a lithium battery cap cover and a battery cell body provided in an embodiment of the present invention;

fig. 2 is an exploded rear view of an assembly of a lithium battery cap cover and a battery cell body according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a lithium battery provided in an embodiment of the present invention after being assembled.

In the figure: 100. a cell body; 200. a lithium battery; 1. a cover body base plate; 2. a cap body; 3. a plastic bracket; 30. a buckle structure; 31. a first through hole; 4. nickel flakes; 5. a protection plate; 50. a substrate; 51. fixing a column; 6. a cap rubber sleeve; 7. steel bushing; 70. an accommodating chamber; 71. a second through hole; 8. a steel sheet; 9. And (5) coating the battery.

Detailed Description

An embodiment of the utility model provides a lithium cell block lid and lithium cell for reduce the dislocation rate of assembly and improve the assembly steadiness, improve production efficiency.

In order to make the objects, features and advantages of the present invention more obvious and understandable, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The technical solution of the present invention is further explained by the following embodiments with reference to the drawings.

The first embodiment is as follows:

referring to fig. 1, fig. 1 is an exploded view of an assembly structure of a lithium battery cap and a battery cell body 100, as shown in fig. 1, the lithium battery cap includes a cover bottom plate 1 integrally formed with a positive electrode of the battery cell body 100 and a cap cover 2 covering the periphery of the cover bottom plate 1, and a plurality of sunken slots 10 are formed in the cover bottom plate 1; the cover body base plate 1 is made of metal material, such as aluminum, steel, copper, etc., the middle position of the cover body base plate 1 is a circular metal sheet, and the circular metal sheet is flatly attached to the positive pole of the battery body 100, and is connected with the outer edge of the positive pole of the battery body 100 through an arc-shaped connecting sheet, and a sunken slotted hole 10 is formed.

The cap lid 2 includes plastic support 3, plastic support 3 orientation be provided with in the one side of lid bottom plate 1 with slotted hole 10 assorted buckle structure 30, buckle structure 30's tip is equipped with the pothook structure, through this pothook structure and slotted hole 10 looks joint, fixes on the lid bottom plate 1, make plastic support 3 and electric core body 100's assembly dislocation rate little, improve the steadiness of plastic support 3 and electric core body 100 assembly to reach the stability of product size and be convenient for operate, improve production efficiency, reduce heat-conduction each other between battery circuit board and the electric core body 100, improve the product quality.

Furthermore, the middle position of the plastic support 3 is provided with a first through hole 31, and the fastening structure 30 is arranged on the periphery of the first through hole 31.

Specifically, when the number of the fastening structures 30 is 3, the number of the slots 10 is also 3, and the slots are equidistantly arranged on the outer peripheral edge of the first through hole 31, so that the fastening structures are conveniently fastened with the slots 10. The number and positions of the snap structures 30 and the slots 10 can be matched without limitation.

Furthermore, the plastic support 3 faces the one surface of the cover body bottom plate 1 and the nickel sheet 4 are fixed in a buckling mode, and the nickel sheet 4 is abutted to the cover body bottom plate 1.

Specifically, nickel sheet 4 is the U type structure that both sides differ in length, just can catch on plastic support 3 and realize fixing to with 1 looks butt of lid bottom plate, realize that the circuit switches on.

Furthermore, a mounting groove is formed in one surface, away from the cover body bottom plate 1, of the plastic support 3, a protection plate 5 is fixed in the mounting groove, and the protection plate 5 comprises a substrate 50 and a fixing column 51 arranged in the middle of the substrate 50.

Specifically, through keeping away from at plastic support 3 be equipped with mounting groove on the one side of lid bottom plate 1, the mounting groove internal fixation has protection shield 5, and protection shield 5 includes base plate 50 and the bellied fixed column 51 that makes progress, the fixed column 51 overcoat is equipped with block gum cover 6.

Further, the novel steel cover is characterized by further comprising a steel sleeve 7, a containing cavity 70 is formed in the steel sleeve 7, a second through hole 71 is formed in the middle of the steel sleeve 7, and the steel sleeve 7 is sleeved on the periphery of the cover body bottom plate 1.

Specifically, a second through hole 71 is formed in the middle of the steel sleeve 7, and the fixing post 51 sleeved with the cap rubber 6 is exposed from the second through hole 71.

Further, the accommodating cavity 70 is internally sleeved with the cap rubber sleeve 6, the protection plate 5, the plastic support 3, the nickel sheet 4 and the cover body bottom plate 1, and all the parts are fixed together.

Example two:

a lithium battery 200 is also provided, comprising the lithium battery cap.

In particular, the cap of the lithium battery 200 may be used in any type of lithium ion battery, particularly cylindrical batteries such as 18650 lithium batteries and 21700 lithium batteries.

Further, a steel sheet 8 is arranged at the negative electrode of the battery cell body 100, and the conduction of the negative electrode is realized through the steel sheet 8.

Further, the battery cover structure further comprises a battery cover 9, wherein the battery cover 9 is sleeved outside the battery cell body 100 and the cap cover body 2.

Specifically, the assembly of the lithium battery 200 is completed by sleeving the battery jacket 9 outside the battery cell body 100 and the cap cover body 2, and the battery jacket 9 is made of PVC, which plays a role in protecting the battery cell body 100 and the cap cover body 2.

To sum up, the embodiment of the present invention provides a lithium battery cap and a lithium battery, including a cover body bottom plate integrally formed with the positive electrode of the battery cell body and a cap cover body covering the periphery of the cover body bottom plate, wherein the cover body bottom plate is provided with a plurality of sunken slotted holes; the nut cap cover body comprises a plastic support, a buckle structure matched with the slotted hole is arranged on one surface of the cover body bottom plate, which faces the cover body bottom plate, and the plastic support is connected and fixed on the cover body bottom plate through the buckle structure and the slotted hole buckle. The clamping structure of the plastic support is clamped with the sunken slot hole, so that the dislocation rate of assembly is reduced, the assembly stability is improved, and the production efficiency is improved.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A lithium battery cap is characterized by comprising a cap body bottom plate (1) and a cap body (2), wherein the cap body bottom plate (1) is integrally formed with a positive electrode of a battery cell body (100), the cap body cover (2) covers the periphery of the cap body bottom plate (1), and a plurality of sunken slotted holes (10) are formed in the cap body bottom plate (1);

the nut cap cover body (2) comprises a plastic support (3), the plastic support (3) faces towards one side of the cover body bottom plate (1) and is provided with a buckle structure (30) matched with the slotted hole (10), and the plastic support (3) is connected and fixed on the cover body bottom plate (1) through the buckle structure (30) and the slotted hole (10) in a buckling mode.

2. A lithium battery cap as claimed in claim 1, characterized in that the plastic bracket (3) is provided with a first through hole (31) at the middle position, the number of the snap structures (30) is 3, and the snap structures (30) are arranged on the outer periphery of the first through hole (31).

3. A lithium battery cap as claimed in claim 1, characterized in that the plastic support (3) is fixed to the cover bottom plate (1) by a snap fit with a nickel plate (4), and the nickel plate (4) abuts against the cover bottom plate (1).

4. A lithium battery cap as claimed in claim 3, characterized in that a mounting groove is provided on the side of the plastic bracket (3) away from the bottom plate (1) of the cover body, a protection plate (5) is fixed in the mounting groove, and the protection plate (5) comprises a base plate (50) and an upward protruding fixing column (51) arranged in the middle of the base plate (50).

5. A lithium battery cap as claimed in claim 4, characterized in that the cap rubber sleeve (6) is sleeved outside the fixing post (51).

6. A lithium battery cap as claimed in claim 5, characterized by further comprising a steel sleeve (7), wherein a containing cavity (70) is arranged in the steel sleeve (7), a second through hole (71) is arranged in the middle of the steel sleeve (7), and the steel sleeve (7) is sleeved on the periphery of the cover body bottom plate (1).

7. A lithium battery cap as claimed in claim 6, characterized in that the fixing posts (51) protrude from the second through holes (71); the containing cavity (70) is internally sleeved with the cap rubber sleeve (6), the protective plate (5), the plastic support (3), the nickel sheet (4) and the cover body bottom plate (1).

8. A lithium battery comprising the lithium battery cap according to any one of claims 1 to 7.

9. The lithium battery according to claim 8, wherein a steel sheet (8) is provided at the negative electrode of the cell body (100).

10. The lithium battery of claim 8, further comprising a battery jacket (9), wherein the battery jacket (9) is sleeved outside the cell body (100) and the cap body (2).