CN210723255U

CN210723255U - Lithium ion battery

Info

Publication number: CN210723255U
Application number: CN201922308116.2U
Authority: CN
Inventors: 郭永民; 杨春海
Original assignee: Jiangsu Nuodi Amperex Technology Ltd
Current assignee: Jiangsu Nuodi Amperex Technology Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-06-09
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses a lithium ion battery, which comprises a shell, a top cover, a polar ear and a naked electric core, and also comprises a lithium supplementing mechanism and heat dissipation plates arranged at the two sides of the shell, wherein a transverse plate is arranged around the outer side of the naked electric core, and a vertical plate is penetrated inside the transverse plate; mend lithium mechanism including solid fixed ring, fender net, lithium metal post, piston, stripper plate and spring, naked electric core top both sides fixedly connected with solid fixed ring, bottom gu fixed ring bottom fixedly connected with keeps off the net, it is equipped with the lithium metal post to keep off the net top. The utility model discloses a setting up and keeping off net, lithium metal post, stripper plate and spring, being favorable to driving the stripper plate extrusion lithium metal post under the effect of spring for in the lithium metal post electrolysis entered into naked electric core again after the bottom, make mend more permanent of lithium time, improve life, simple structure.

Description

Lithium ion battery

Technical Field

The utility model relates to a lithium ion battery field, in particular to lithium ion battery.

Background

At present, lithium ion batteries have been widely used in the fields of mobile phones, electric tools, medical electronics and the like due to excellent performance, and have also shown good application prospects in the fields of new energy automobiles, energy storage base stations and the like. For lithium ion batteries, the higher the energy density and power density, the better, however, in the first charge and discharge process of lithium ions, the organic electrolyte is reduced and decomposed on the surface of most negative electrode materials to form an electronically insulating and lithium ion conductive passivation layer SEI film, and the formation of the SEI film needs to consume a part of lithium ions from the positive electrode, which affects the capacity performance of the positive electrode material The lithium metal is easy to spontaneously combust, so that the requirement on the rolling environment is high, the electrolysis of the lithium metal is fast, and the long-term use of the lithium battery is influenced.

Therefore, it is necessary to invent a lithium ion battery to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lithium ion battery to the current lithium ion battery's that provides in solving above-mentioned background art mends the lithium structure comparatively complicated, and the electrolysis of lithium metal is very fast, influences the permanent problem of using of lithium cell.

In order to achieve the above object, the utility model provides a following technical scheme: a lithium ion battery comprises a shell, a top cover, a tab, a naked cell, a lithium supplementing mechanism and heat dissipation plates arranged on two sides of the shell, wherein a transverse plate is arranged on the outer side of the naked cell in a surrounding mode, and a vertical plate penetrates through the inner part of the transverse plate;

mend lithium mechanism including solid fixed ring, fender net, lithium metal post, piston, stripper plate and spring, the solid fixed ring of naked electric core top both sides fixedly connected with, the bottom solid fixed ring bottom fixedly connected with keeps off the net, it is equipped with the lithium metal post to keep off the net top, the lithium metal post runs through naked electric core, lithium metal post outside cover is equipped with the piston, the lithium metal post is kept away from and is kept off the net end and be connected with the stripper plate, stripper plate top fixedly connected with spring.

Preferably, the heat dissipation plate is provided as a woven mesh structure.

Preferably, the fixing ring is provided in a ring shape.

Preferably, the piston and the naked electric core are arranged in a clamping manner.

Preferably, the top of the spring is fixedly connected with the shell.

Preferably, the top of the fixing ring is fixedly connected with the shell.

The utility model has the advantages that:

(1) the arrangement of the blocking net, the lithium metal column, the extrusion plate and the spring is beneficial to driving the extrusion plate to extrude the lithium metal column under the action of the spring, so that the lithium metal column enters the bare cell after the bottom of the lithium metal column is electrolyzed, the lithium supplement time is longer, the service life is prolonged, and the structure is simple;

(2) through setting up heating panel, diaphragm and riser, be favorable to carrying out fine heat dissipation to lithium ion battery, play better guard action, increase of service life.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

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

in the figure: 1 shell, 2 top caps, 3 utmost point ear, 4 naked electric cores, 5 heating panels, 6 diaphragm, 7 risers, 8 solid fixed rings, 9 keep off net, 10 lithium metal post, 11 pistons, 12 stripper plates, 13 springs.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model provides a lithium ion battery as shown in figures 1-2, which comprises a shell 1, a top cover 2, a tab 3, a naked electric core 4, a lithium supplementing mechanism and a heat radiation plate 5 arranged at two sides of the shell 1, a transverse plate 6 is arranged around the outer side of the naked electric core 4, a vertical plate 7 is arranged inside the transverse plate 6 in a penetrating way, and the transverse plate 6 and the vertical plate 7 are arranged to be heat radiation materials;

mend lithium mechanism including solid fixed ring 8, keep off net 9, lithium metal post 10, piston 11, stripper plate 12 and spring 13, the solid fixed ring 8 of 4 top both sides fixedly connected with of naked electric core, the bottom solid fixed ring 8 bottom fixedly connected with keeps off net 9, it is equipped with lithium metal post 10 to keep off net 9 top, lithium metal post 10 runs through naked electric core 4, lithium metal post 10 outside cover is equipped with piston 11, lithium metal post 10 keeps away from to keep off net 9 end and is connected with stripper plate 12, stripper plate 12 top fixedly connected with spring 13.

Further, in the above technical solution, the heat dissipation plate 5 is provided as a woven mesh structure;

further, in the above technical solution, the fixing ring 8 is provided in a ring shape;

further, in the above technical solution, the piston 11 and the bare cell 4 are clamped;

further, in the above technical solution, the top of the spring 13 is fixedly connected with the housing 1;

further, in the above technical solution, the top of the fixing ring 8 is fixedly connected with the housing 1.

This practical theory of operation:

referring to the attached drawings 1-2 of the specification, in use, when lithium ions are charged and discharged for the first time, organic electrolyte is reduced and decomposed on the surfaces of most negative electrode materials to form a passivation layer SEI film with electronic insulation and lithium ion conduction, when part of the lithium ions from the positive electrode are consumed, a part of the lithium ions are electrolyzed from the lithium metal column 10 extending into the naked electric core 4 through the blocking net 9 to supplement the lithium ions, the structure is simple, after the lithium metal column 10 entering the naked electric core 4 is electrolyzed, the extrusion plate 12 is enabled to extrude the lithium metal column 10 to move downwards under the action of the spring 13, and the lithium metal column 10 enters the naked electric core 4 again, so that the situation that the lithium ions are rapidly consumed due to the fact that the lithium metal column 10 is electrolyzed completely is effectively avoided, and the long-term use of the lithium ion battery is affected.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a lithium ion battery, includes shell (1), top cap (2), utmost point ear (3) and naked electric core (4), its characterized in that: the lithium battery is characterized by further comprising a lithium supplementing mechanism and heat dissipation plates (5) arranged on two sides of the shell (1), a transverse plate (6) is arranged on the outer side of the naked battery cell (4) in a surrounding mode, and a vertical plate (7) penetrates through the transverse plate (6);

mend lithium mechanism including solid fixed ring (8), keep off net (9), lithium metal post (10), piston (11), stripper plate (12) and spring (13), naked electric core (4) top both sides fixedly connected with solid fixed ring (8), the bottom gu fixed ring (8) bottom fixedly connected with keeps off net (9), it is equipped with lithium metal post (10) to keep off net (9) top, lithium metal post (10) run through naked electric core (4), lithium metal post (10) outside cover is equipped with piston (11), lithium metal post (10) are kept away from and are kept off net (9) end and be connected with stripper plate (12), stripper plate (12) top fixedly connected with spring (13).

2. The lithium ion battery of claim 1, wherein: the heat dissipation plate (5) is of a woven net structure.

3. The lithium ion battery of claim 1, wherein: the fixing ring (8) is arranged in a circular ring shape.

4. The lithium ion battery of claim 1, wherein: the piston (11) and the naked battery cell (4) are clamped.

5. The lithium ion battery of claim 1, wherein: the top of the spring (13) is fixedly connected with the shell (1).

6. The lithium ion battery of claim 1, wherein: the top of the fixing ring (8) is fixedly connected with the shell (1).