CN220121973U - Sealed lithium battery cap - Google Patents

Abstract

The utility model discloses a sealed lithium battery cap, comprising: a body assembly; the sealing assembly comprises an upper cover, a positive electrode end, a plastic protective cover, an elastic expansion piece, an anti-riot ring, an insulating block and a notch, wherein the positive electrode end and the plastic protective cover are connected to the lower end of the upper cover; and a limiting component. The existing lithium battery cap is directly clamped on the negative plate through the concave-convex shape, and is easy to fall off, so that the lithium battery is scrapped, and even potential safety hazards are generated. Through set up irreversible elasticity flexible piece on connecting the plastics protective housing between upper cover and the positive pole end, elasticity flexible piece card is dead in the notch, will upper cover card die under the elastic action, can not drop, makes the lithium cell form a sealed space.

Description

Sealed lithium battery cap

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to a sealed lithium battery cap.

Background

Lithium batteries refer to batteries incorporating lithium (including metallic lithium, lithium alloys and lithium ions, lithium polymers) in an electrochemical system. Lithium batteries can be broadly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium metal batteries are typically non-rechargeable and are internally metallic lithium. Lithium ion batteries do not contain lithium in the metallic state and are rechargeable.

The lithium battery cap is a key part of a lithium battery, is arranged at the positive electrode of the lithium battery and is directly connected with the positive electrode end, and the lithium battery cap in the prior art is directly clamped on the negative plate through the concave-convex shape, so that the lithium battery is easy to fall off, and even potential safety hazards are generated.

Disclosure of Invention

Therefore, the utility model aims to provide a sealed lithium battery cap, an irreversible elastic expansion block is arranged on a plastic protective cover connected between an upper cover and a positive electrode end, the elastic expansion block is clamped in a notch, the upper cover is clamped under the elastic action and cannot fall off, and a sealed space is formed by a lithium battery.

In order to solve the technical problems, according to one aspect of the present utility model, the following technical solutions are provided:

a sealed lithium battery cap comprising:

the main body component is placed in the electrical appliance original;

the sealing assembly comprises an upper cover, a positive electrode end, a plastic protective cover, an elastic expansion piece, an anti-riot ring, an insulating block and a notch, wherein the positive electrode end and the plastic protective cover are connected to the lower end of the upper cover;

and the limiting assembly is used for preventing the upper cover from rotating.

As a preferable scheme of the sealed lithium battery cap, the upper side of the elastic expansion piece is a flat opening, the lower side of the elastic expansion piece is an arc opening, and the elastic expansion piece is movably connected in the notch.

As a preferable scheme of the sealed lithium battery cap, the main body component comprises a negative plate and an annular groove arranged on the upper part of the negative plate.

As a preferred embodiment of the sealed lithium battery cap according to the present utility model, the body assembly further includes a separator connected to the inside of the negative electrode plate, a positive electrode plate connected to the inside of the separator, an electrolyte connected to the inside of the positive electrode plate, and a negative electrode terminal connected to the bottom of the negative electrode plate.

Specifically, when the lithium battery is charged, electrons E on the positive electrode run to the negative electrode through an external circuit, lower lithium ions Li+ enter the electrolyte from the positive electrode and reach the negative electrode through the bent small holes on the diaphragm, and are combined with the electrons E.

As an optimal scheme of the sealed lithium battery cap, the limit component comprises a sealing ring connected to the inner side of the upper cover, a cylindrical clamping groove connected to the bottom of the inner side of the upper cover, and a cylindrical clamping block connected to the upper end of the plastic protective cover.

As a preferable scheme of the sealed lithium battery cap, four groups of cylindrical clamping blocks are clamped in four groups of cylindrical clamping grooves.

Compared with the prior art, through setting up irreversible elasticity flexible piece on connecting the plastics shield between upper cover and the positive pole end, elasticity flexible piece card is dead in the notch, dead with the upper cover card under the elastic action, can not drop, make the lithium cell form a sealed space, when specifically using, put the insulating piece in the inside upper shed department of main part subassembly, the anti-riot circle is put in the insulating piece upper end, the plastics shield is put into the upper cover, the positive pole end passes plastics shield and upper cover, with connecting plastics shield, positive pole end and upper cover are pressed together on the negative plate, elasticity flexible piece is pressed into in the plastics shield, when pressing the notch to annular groove department, elasticity flexible piece pops out, dead in the negative plate with plastics shield and positive pole end card, the elasticity flexible piece that pops out just presses the upper cover, firmly fix the upper cover, simultaneously, curved insulating piece is dead with positive pole end card on plastics shield, prevent that positive pole end from dropping, lithium cell forms a well sealed environment this moment, and be difficult for droing.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following detailed description of the embodiments of the present utility model will be given with reference to the accompanying drawings, which are to be understood as merely some embodiments of the present utility model, and from which other drawings can be obtained by those skilled in the art without inventive faculty. Wherein:

FIG. 1 is an expanded view of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is an enlarged view of the utility model at A;

fig. 4 is a bottom view of the present utility model.

In the figure: 10. a body assembly; 11. an annular groove; 12. a negative plate; 13. a diaphragm; 14. a positive plate; 15. an electrolyte; 16. a negative terminal; 20. a seal assembly; 21. an upper cover; 22. a positive terminal; 23. a plastic protective cover; 24. an elastic expansion piece; 25. an anti-riot ring; 26. an insulating block; 27. a notch; 30. a limit component; 31. a seal ring; 32. a cylindrical clamping block; 33. a cylindrical clamping groove.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

In the following detailed description of the embodiments of the present utility model, the cross-sectional view of the device structure is not partially enlarged to a general scale for the convenience of description, and the schematic is merely an example, which should not limit the scope of the present utility model. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

The utility model provides a sealed lithium battery cap, which comprises: through set up irreversible elasticity flexible piece on connecting the plastics protective housing between upper cover and the positive pole end, elasticity flexible piece card is dead in the notch, will upper cover card die under the elastic action, can not drop, makes the lithium cell form a sealed space.

Example 1

Fig. 1-3 are schematic views showing the overall structure of an embodiment of the sealed lithium battery cap of the present utility model, including: a body assembly 10, a seal assembly 20.

The main body assembly 10 is placed in an electrical appliance and comprises a negative plate 12, an annular groove 11 formed in the upper portion of the negative plate 12, a diaphragm 13 connected in the negative plate 12, a positive plate 14 connected in the diaphragm 13, an electrolyte 15 connected in the positive plate 14 and a negative end 16 connected at the bottom of the negative plate 12.

The sealing assembly 20 comprises an upper cover 21, a positive electrode end 22 and a plastic protective cover 23 which are connected to the lower end of the upper cover 21, an elastic expansion piece 24 connected to the plastic protective cover 23, an anti-riot ring 25 connected to the lower end of the positive electrode end 22, an insulating block 26 connected to the lower end of the anti-riot ring 25, and a notch 27 connected to the elastic expansion piece 24, wherein the upper side of the elastic expansion piece 24 is a flat opening, the lower side of the elastic expansion piece 24 is an arc opening, and the elastic expansion piece 24 is movably connected in the notch 27.

Use of seal assembly 20:

the insulation block 26 is placed at the upper opening of the main body assembly 10, the anti-riot ring 25 is placed at the upper end of the insulation block 26, the plastic protective cover 23 is placed in the upper cover 21, the positive electrode end 22 penetrates through the plastic protective cover 23 and the upper cover 21, the connected plastic protective cover 23, the positive electrode end 22 and the upper cover 21 are pressed onto the negative electrode plate 12 together, the elastic telescopic piece 24 is pressed into the plastic protective cover 23, when the elastic telescopic piece 24 is pressed to the notch 27 at the annular groove 11, the elastic telescopic piece 24 ejects out to clamp the plastic protective cover 23 and the positive electrode end 22 in the negative electrode plate 12, the ejected elastic telescopic piece 24 is just pressed onto the upper cover 21 to firmly fix the upper cover 21, meanwhile, the arc-shaped insulation block 26 clamps the positive electrode end 22 on the plastic protective cover 23 to prevent the positive electrode end 22 from falling, and the lithium battery forms a good sealed environment at the moment and is not easy to fall off.

Example 2

As shown in fig. 1 and 4:

the limiting assembly 30 comprises a sealing ring 31 connected to the inner side of the upper cover 21, a cylindrical clamping groove 33 connected to the bottom of the inner side of the upper cover 21, and cylindrical clamping blocks 32 connected to the upper end of the plastic protection cover 23, wherein four groups of cylindrical clamping blocks 32 are clamped in the four groups of cylindrical clamping grooves 33.

Use of the stop assembly 30:

when the upper cover 21 is clamped on the negative plate 12, the limiting component 30 is added to clamp four sets of cylindrical clamping blocks 32 connected to the plastic protective cover 23 in the cylindrical clamping groove 33 at the lower end of the upper cover 21 due to the fact that the limiting component possibly rotates due to external reasons, and when the elastic telescopic piece 24 is clamped in the notch 27 and cannot move, the upper cover 21 cannot rotate through the clamped cylindrical clamping blocks 32 and the cylindrical clamping groove 33, and further the upper cover 21 is clamped on the negative plate 12, so that a sealed environment is formed.

Although the utility model has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the features of the disclosed embodiments may be combined with each other in any manner as long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of omitting the descriptions and saving resources. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (6)

1. Sealed lithium cell hood, its characterized in that includes:

a main body assembly (10) placed in the electrical appliance original;

the sealing assembly (20) comprises an upper cover (21), a positive electrode end (22) and a plastic protective cover (23) which are arranged at the lower end of the upper cover (21), an elastic telescopic piece (24) connected to the plastic protective cover (23), an anti-riot ring (25) connected to the lower end of the positive electrode end (22), an insulating block (26) connected to the lower end of the anti-riot ring (25) and a notch (27) connected to the elastic telescopic piece (24);

and the limiting assembly (30) prevents the upper cover (21) from rotating.

2. The sealed lithium battery cap according to claim 1, wherein the upper side of the elastic expansion piece (24) is a flat opening, the lower side is an arc opening, and the elastic expansion piece (24) is movably connected in the notch (27).

3. The sealed lithium battery cap according to claim 1, wherein the main body assembly (10) comprises a negative plate (12) and an annular groove (11) formed in an upper portion of the negative plate (12).

4. A sealed lithium battery cap according to claim 3, wherein the body assembly (10) further comprises a separator (13) connected within the negative electrode plate (12), a positive electrode plate (14) connected within the separator (13), an electrolyte (15) connected within the positive electrode plate (14), and a negative electrode end (16) connected to the bottom of the negative electrode plate (12).

5. The sealed lithium battery cap according to claim 1, wherein the limit assembly (30) comprises a sealing ring (31) connected to the inner side of the upper cover (21), a cylindrical clamping groove (33) connected to the bottom of the inner side of the upper cover (21), and a cylindrical clamping block (32) connected to the upper end of the plastic protection cover (23).

6. The sealed lithium battery cap according to claim 5, wherein four sets of cylindrical clamping blocks (32) are clamped in four sets of cylindrical clamping grooves (33).