CN213520074U

CN213520074U - Explosion-proof lithium battery

Info

Publication number: CN213520074U
Application number: CN202022646189.5U
Authority: CN
Inventors: 毛宇文; 陈兴苑
Original assignee: Shenzhen Linangsheng Technology Co ltd
Current assignee: Shenzhen Linangsheng Technology Co ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-06-22
Anticipated expiration: 2030-11-16

Abstract

The utility model relates to a lithium cell technical field discloses an explosion-proof lithium cell, the camera comprises a cylinder, the cylinder is by outer to interior outer shell, leak protection electricity encapsulating layer and the explosion-proof layer of SF6 packing, SF6 packs the center on explosion-proof layer and is the cavity structure, and the cavity intussuseption is filled with the electrolyte, the electrolyte internal fixation is equipped with the conducting shaft electrolyte and the fixed first insulation board that is equipped with in top that the explosion-proof layer was filled to SF6, the fixed upper cover plate that is equipped with in top of first insulation board, leak protection electricity encapsulating layer and outer shell, the central point of upper cover plate puts to run through and is equipped with the anodal post, the lower extreme of anodal post with conducting shaft fixed connection. And a cathode plate is fixedly arranged at the lower bottom end of the SF6 filled explosion-proof layer. The shell layer is provided with a butt joint port for butting the negative plate at the bottom end of the column body. And the top end of the positive pole is provided with a positive pole cap. The conductive shaft is made of LiCoO2, and the electrolyte is a lithium battery solid electrolyte. The device has the advantages of obvious effect, low cost and strong practicability.

Description

Explosion-proof lithium battery

Technical Field

The utility model relates to a lithium cell technical field especially relates to an explosion-proof lithium cell.

Background

A "lithium battery" is a type of battery using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a positive/negative electrode material. Lithium metal batteries were first proposed and studied by Gilbert n.lewis in 1912. In the 70 s of the 20 th century, m.s.whitetingham proposed and began to study lithium ion batteries. Because the chemical characteristics of lithium metal are very active, the requirements on the environment for processing, storing and using the lithium metal are very high. With the development of scientific technology, lithium batteries have become the mainstream. Lithium batteries can be broadly classified into two types: lithium metal batteries and lithium ion batteries. Lithium ion batteries do not contain lithium in the metallic state and are rechargeable. The fifth generation of rechargeable batteries, lithium metal batteries, was born in 1996, and the safety, specific capacity, self-discharge rate and cost performance of rechargeable batteries were all superior to those of lithium ion batteries. Due to its own high technical requirement limits, only a few countries of companies are producing such lithium metal batteries.

The heat dissipation and the protection of lithium cell on the market all reach higher level now, as long as the lithium cell of production is according to the material of standard, and conventional practicality can not arouse the explosion, but always have extreme condition, for example children's toy car is put in the scope that outdoor solar energy shines, and the lithium cell explosion is because thermal runaway or diaphragm damage. Thermal runaway is well understood to be overheating, and if a lithium battery is overheated, it will burn and explode. The lithium battery has a separator inside, and if the separator is damaged, the positive electrode and the negative electrode are in direct contact, thus short-circuiting. If the battery is short-circuited, it may also cause the battery to explode momentarily ".

The explosion of the battery is not only caused by the increase of the internal pressure, but also caused by the participation of subsequent oxygen, and most of the serious explosion conditions are caused by the subsequent combustion, so that on the basis of the existing lithium battery, the strengthening measures for preventing the leakage of the lithium battery or blocking the combustion source are taken to prevent the explosion.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an explosion-proof lithium cell, the utility model discloses a be equipped with one deck SF6 and fill explosion-proof layer between leak protection electricity encapsulating layer and electrolyte layer, even inside electrolyte overheat pressure increase lead to electrolyte and lead to the diaphragm damage between the electrical pillar to cause the too big emergence inflation of pressure, can not lead to the oxygen contact production burning explosion in the direct perforation of outer shell and the air yet, because SF6 inert gas's isolation, directly cut off the inside and external contact of battery, can not produce the burning and then produce the explosion after taking place the inside pressure release heat dissipation of battery. The utility model discloses the effect is showing, and is with low costs, and the practicality is strong, can avoid the lithium cell to take place unexpected further to worsen the condition emergence that takes place to explode.

The utility model discloses an above-mentioned technical problem is solved to following technical means:

the utility model discloses an explosion-proof lithium battery includes the cylinder, the cylinder is filled the explosion-proof layer by outer to interior outer shell, leak protection electricity encapsulating layer and the SF6 of being equipped with, SF6 fills the center of explosion-proof layer and is the cavity structure, and the cavity intussuseption is filled with the electrolyte, the electrolyte internal fixation is equipped with the conducting shaft the electrolyte is equipped with the first insulation board with the top that SF6 filled the explosion-proof layer is fixed, the fixed upper cover plate that is equipped with in top of first insulation board, leak protection electricity encapsulating layer and outer shell, the central point of upper cover plate puts to run through and is equipped with the anodal post, the lower extreme of anodal post with conducting shaft fixed connection.

Furthermore, a cathode plate is fixedly arranged at the lower bottom end of the SF6 filled explosion-proof layer.

Further, the shell layer is provided with a butt joint port of butt negative plate at the bottom of cylinder.

Further, the top end of the positive pole is provided with a positive pole cap.

Further, the conductive shaft is made of LiCoO2, and the electrolyte is a lithium battery solid electrolyte.

The utility model has the advantages that: through being equipped with one deck SF6 and filling explosion-proof layer between leak protection electricity encapsulating layer and electrolyte layer, even inside electrolyte overheat pressure increase leads to electrolyte and the diaphragm damage between the conductive post to cause the too big emergence inflation of pressure, can not lead to the direct perforation of shell layer and the oxygen contact in the air to produce the burning explosion yet, because SF6 inert gas's isolation effect, directly cut off the inside and external contact of battery, can not produce the burning and then produce the explosion after taking place the inside pressure release heat dissipation of battery. The utility model discloses the effect is showing, and is with low costs, and the practicality is strong, can avoid the lithium cell to take place unexpected further to worsen the condition emergence that takes place to explode.

Drawings

Fig. 1 is a schematic structural diagram of an explosion-proof lithium battery of the present invention;

wherein: the high-voltage insulation type lithium ion battery comprises a column body 1, a first insulation plate 10, a shell layer 11, an anti-creeping potting layer 12, an SF6 filled explosion-proof layer 13, an electrolyte 14, a conductive shaft 15, an upper cover plate 2, a positive column 3, a positive cap 4, a negative plate 5 and a first insulation plate 6.

Detailed Description

The invention will be described in detail with reference to the following drawings and specific embodiments:

as shown in fig. 1, the utility model discloses an explosion-proof lithium cell includes cylinder 1, cylinder 1 is by outer to interior shell layer 11, leak protection electricity encapsulating layer 12 and the fill explosion-proof layer 13 of SF6 of being equipped with, SF6 fills the center of explosion-proof layer 13 and is the cavity structure, and the cavity intussuseption is filled with electrolyte 14, electrolyte 14 internal fixation is equipped with conductive shaft 15 electrolyte 14 fills fixed first insulation board 10 that is equipped with in the top that explosion-proof layer 13 was filled to SF6, first insulation board 10, leak protection electricity encapsulating layer 12 and shell layer 11's top are fixed and are equipped with upper cover plate 2, the central point of upper cover plate 2 puts and runs through and is equipped with anodal post 3, anodal post 3 the lower extreme with conductive shaft 15 fixed connection.

In this embodiment, the lower bottom end of the SF6 filled explosion-proof layer 13 is fixedly provided with a cathode plate 5.

In this embodiment, the bottom end of the column of the casing layer 11 is provided with a butt joint port for butting against the cathode plate 5.

In this embodiment, the top end of the positive post 3 is provided with a positive cap 4.

In this embodiment, the conductive shaft 15 is made of LiCoO2, and the electrolyte 14 is a solid electrolyte of a lithium battery.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will understand that the present invention can be modified or replaced with other embodiments without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims. The technology, shape and construction parts which are not described in detail in the present invention are all known technology.

Claims

1. An explosion-proof lithium battery, characterized in that: including cylinder (1), cylinder (1) is by outer to interior shell layer (11), leak protection electricity encapsulating layer (12) and SF6 packing explosion-proof layer (13) of being equipped with, SF6 fills the center of explosion-proof layer (13) and is the cavity structure, and the cavity intussuseption is filled with electrolyte (14), electrolyte (14) internal fixation is equipped with electrically conductive axle (15) electrolyte (14) and SF6 fill the top of explosion-proof layer (13) and fix and be equipped with first insulation board (6), the fixed upper cover plate (2) that is equipped with in top of first insulation board (6), leak protection electricity encapsulating layer (12) and shell layer (11), the central point of upper cover plate (2) puts through being equipped with positive post (3), the lower extreme of positive post (3) with electrically conductive axle (15) fixed connection.

2. The explosion-proof lithium battery of claim 1, wherein: and a cathode plate (5) is fixedly arranged at the lower bottom end of the SF6 filling explosion-proof layer (13).

3. The explosion-proof lithium battery of claim 1, wherein: the outer shell layer (11) is provided with a butt joint port which is butted with the cathode plate (5) at the bottom end of the column body (1).

4. The explosion-proof lithium battery of claim 1, wherein: and the top end of the positive pole column (3) is provided with a positive pole cap (4).

5. The explosion-proof lithium battery of claim 1, wherein: the conductive shaft (15) is made of LiCoO2, and the electrolyte (14) is a lithium battery solid electrolyte.