CN210723193U

CN210723193U - One-time stamping forming lithium battery shell

Info

Publication number: CN210723193U
Application number: CN201921775730.3U
Authority: CN
Inventors: 虞军达
Original assignee: Jiangsu Qianda Energy Technology Co ltd
Current assignee: Jiangsu Qianda Energy Technology Co ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-06-09
Anticipated expiration: 2029-10-22

Abstract

The utility model discloses a lithium battery shell formed by one-step stamping, which comprises a lithium battery shell, an anode fixing ring fixedly arranged at one end of the lithium battery shell and a cathode fixing ring fixedly arranged at the other end of the lithium battery shell, wherein one end of the anode fixing ring is provided with an anode ring cover, the inner side of the anode ring cover is fixedly provided with an explosion-proof ring, four explosion-proof grooves are symmetrically arranged at the surface position of the explosion-proof ring, the inner side of the explosion-proof groove is fixedly provided with an explosion-proof groove surface, the utility model is provided with the explosion-proof ring, the explosion-proof groove and the explosion-proof cap surface, when the lithium battery is out of control due to heat and the explosion-proof cap is invalid, the explosion-proof groove surface of the explosion-proof groove can be quickly washed away and fall off by air pressure, the explosion-proof groove surface can form a through hole on the anode ring cover after being washed away and, the use safety and the reliability of the lithium battery shell are improved.

Description

One-time stamping forming lithium battery shell

Technical Field

The utility model relates to a one-time stamping forming's lithium cell casing belongs to lithium cell technical field.

Background

Lithium batteries are a type of battery using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a 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. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have become mainstream at present, and the outer side of the lithium battery is provided with a lithium battery shell.

However, the conventional lithium battery shell has the following problems in the use process:

1. when the lithium battery is out of control due to heat and the explosion-proof cap is invalid, the danger that the lithium battery is easy to explode is caused due to the fact that pressure relief cannot be carried out in time, and the use safety and the reliability of the lithium battery shell are reduced.

2. Because the leakproofness between traditional lithium cell casing and the anodal ring lid is relatively poor, lead to external dust impurity to get into lithium cell casing internal corrosion lithium cell easily, reduced the life who improves the lithium cell.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a one shot stamping forming's lithium cell casing to the defect that prior art exists.

The utility model discloses a realize above-mentioned purpose, adopt following technical scheme: the lithium battery comprises a lithium battery shell, an anode fixing ring fixedly arranged at one end of the lithium battery shell and a cathode fixing ring fixedly arranged at the other end of the lithium battery shell; wherein the content of the first and second substances,

the one end of anodal solid fixed ring is provided with anodal ring lid, the inboard fixed explosion-proof circle that is provided with of anodal ring lid, four explosion-proof recesses have been seted up to the surperficial position department symmetry of explosion-proof circle, the inboard fixed explosion-proof groove face that is provided with of explosion-proof recess, the bottom mounting of anodal ring lid is provided with the sealing washer piece, sealed recess has been seted up to anodal solid fixed ring's upper end surface position department, one side position department that the bottom of anodal ring lid is close to the sealing washer piece is fixed and is provided with the go-between, one side position department that the inside of lithium cell casing is close to anodal solid fixed ring is fixed and is provided with the positive plate, the fixed.

Further, the outer side surface of the connecting ring is fixedly provided with threads, the inner side surface of the positive electrode fixing ring is provided with a thread groove, and the positive electrode fixing ring is in threaded connection with the connecting ring.

Furthermore, the sealing ring sheet is an aluminum sealing ring sheet component, and the size of the sealing groove is matched with that of the sealing ring sheet.

Furthermore, the cross-sectional shapes of the explosion-proof groove and the explosion-proof groove surface are both circular.

Furthermore, the middle position of the surface of the positive plate is provided with a through opening.

Further, the fixed strengthening rib that is provided with of equidistance interval in the outside surface position department of positive plate, the cross-sectional shape of strengthening rib is the rectangle.

1. The utility model discloses set up explosion-proof circle, explosion-proof recess and explosion-proof capping, when the lithium cell takes place the thermal runaway and explosion-proof block became invalid, the explosion-proof capping of explosion-proof recess can be washed away by atmospheric pressure fast and drops, can form the through-hole on the positive polar ring after explosion-proof capping is washed away and drops to can reach the purpose of timely pressure release, relieve the danger that the lithium cell explodes effectively, improved lithium cell housing's safety in utilization and reliability.

2. The utility model discloses set up sealing washer piece and sealed recess, in the sealing washer piece can cooperate the embedding sealed recess, increased substantially the leakproofness between positive ring lid and the lithium cell casing, can seal the protection better to the lithium cell, prevent because the relatively poor external dust impurity that leads to of leakproofness gets into the lithium cell of lithium cell casing internal corrosion easily, be favorable to improving the lithium cell.

Drawings

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

FIG. 2 is an enlarged schematic view of part A of the present invention;

fig. 3 is a schematic view of the bottom end structure of the anode ring cover of the present invention;

fig. 4 is a schematic front view of the structure of the present invention.

Detailed Description

Fig. 1 to 4 show that, a lithium battery case formed by one-step press forming is involved, which includes a lithium battery case 1, a positive electrode fixing ring 2 fixedly disposed at one end of the lithium battery case 1, and a negative electrode fixing ring 5 fixedly disposed at the other end of the lithium battery case 1; wherein, the one end of anodal solid fixed ring 2 is provided with anodal ring lid 3, the inboard of anodal ring lid 3 is fixed and is provided with explosion-proof circle 4, four explosion-proof recesses 401 have been seted up to explosion-proof circle 4's surface position department symmetry, explosion-proof recess 401's inboard is fixed and is provided with explosion-proof tank face 402, the bottom mounting of anodal ring lid 3 is provided with sealing washer 301, sealed recess 201 has been seted up to anodal solid fixed ring 2's upper end surface position department, the bottom of anodal ring lid 3 is close to one side position department fixed and is provided with go-between 8 of sealing washer 301, the inside of lithium cell casing 1 is close to the fixed positive plate 7 that is provided with of anodal solid fixed ring 2's one side position department, the fixed negative pole ring lid 6 that.

In the process of using the lithium battery shell, when the lithium battery is out of control due to heat and the explosion-proof cap is out of work, four explosion-proof grooves are symmetrically formed in the surface of the explosion-proof ring, the explosion-proof groove faces are fixedly arranged on the inner sides of the explosion-proof grooves and can be quickly flushed by air pressure to fall off, the explosion-proof groove faces are flushed to fall off and then form through holes in the positive ring cover, so that the purpose of timely pressure relief can be achieved, the danger of explosion of the lithium battery is effectively eliminated, the bottom fixing of the positive ring cover is provided with the sealing ring piece, the upper end surface of the positive fixing ring is provided with the sealing groove, the size of the sealing groove is matched with the size of the sealing ring piece, the sealing ring piece can be embedded into the sealing groove in a matched mode, the sealing performance between the positive ring cover and the lithium battery shell.

In a further scheme, the outer side surface of the connection ring 8 is fixedly provided with threads 801, the inner side surface of the positive electrode fixing ring 2 is provided with a thread groove 202, and the positive electrode fixing ring 2 is in threaded connection with the connection ring 8, so that the purpose of conveniently mounting and dismounting the positive electrode ring cover 3 on the lithium battery shell 1 is achieved.

In a further scheme, the sealing ring piece 301 is an aluminum sealing ring piece member, and the size of the sealing groove 201 is matched with that of the sealing ring piece 301, so that the purpose that the sealing ring piece 301 can be matched and embedded into the sealing groove 201 is achieved.

In a further scheme, the cross sections of the explosion-proof groove 401 and the explosion-proof groove surface 402 are both circular, so that the purpose that the explosion-proof groove surface 402 can be timely flushed to release pressure when the lithium battery explodes is achieved.

In a further scheme, the opening 701 is formed in the middle position of the surface of the positive plate 7, so that the purpose of conveniently extracting or adding electrolyte into the lithium battery shell 1 is achieved.

In a further scheme, the equidistant interval of outside surface position department of positive plate 7 is fixed and is provided with strengthening rib 702, strengthening rib 702's cross-sectional shape is the rectangle, has reached the purpose that can improve positive plate 7 structural strength.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A lithium battery shell formed by one-step stamping comprises a lithium battery shell, an anode fixing ring fixedly arranged at one end of the lithium battery shell and a cathode fixing ring fixedly arranged at the other end of the lithium battery shell; wherein the content of the first and second substances,

2. The lithium battery shell formed by one-time stamping according to claim 1, wherein threads are fixedly arranged on the outer side surface of the connecting ring, a thread groove is formed on the inner side surface of the positive electrode fixing ring, and the positive electrode fixing ring is in threaded connection with the connecting ring.

3. The lithium battery case formed by one-time stamping according to claim 1, wherein the sealing ring sheet is an aluminum sealing ring sheet member, and the size of the sealing groove is matched with the size of the sealing ring sheet.

4. The one-time stamping and forming lithium battery shell as claimed in claim 1, wherein the cross-sectional shapes of the explosion-proof groove and the explosion-proof groove surface are both circular.

5. The one-time stamping and forming lithium battery shell as claimed in claim 1, wherein the opening is formed at the middle position of the surface of the positive plate.

6. The one-time stamping forming lithium battery shell as claimed in claim 1, wherein the reinforcing ribs are fixedly arranged at the outer side surface of the positive plate at equal intervals, and the cross section of the reinforcing ribs is rectangular.