CN207852737U

CN207852737U - Lithium battery cap

Info

Publication number: CN207852737U
Application number: CN201820313145.0U
Authority: CN
Inventors: 陈绍辉; 刘勇; 许小亮
Original assignee: Jiangsu Radium Energy Technology Co Ltd
Current assignee: Jiangsu Radium Energy Technology Co Ltd
Priority date: 2018-03-07
Filing date: 2018-03-07
Publication date: 2018-09-11
Anticipated expiration: 2028-03-07

Abstract

The utility model discloses lithium battery caps, include sealing ring, head cover, burst disk, insulated ring and orifice plate successively, the aluminium flake for welding is equipped with below the orifice plate, the aluminium flake is equipped with the circular first boss towards the orifice plate side, the orifice plate is equipped with the first recess portion to match with the first boss, and the welding region of first recess portion is in contact with the burst disk.The application carries out sealing welding using aluminium flake, burst disk, orifice plate and aluminium flake are once welded, welding procedure is simplified, thermal stress is not will produce and leads to weld non-uniform internal flaw problem, the internal hot gas that generates will not also be made to lead to the risk of burst disk stress deformation.

Description

Lithium battery cap

Technical field

The utility model is related to dynamic lithium battery field more particularly to lithium battery caps.

Background technology

Lithium battery cap includes the structures such as head cover, burst disk and orifice plate, in the prior art, is especially welding orifice plate and is preventing Quick-fried welding procedure is after fixing the two, and with ultrasonic welding, such mode can cause not prison welding to be leaned on, and is existed The problem of thermal stress causes to weld internal flaw, concurrently there are welding temperature height, weld poor compatibility.In addition, there is also welderings The problem of hot pressing gas for practicing midwifery raw is not easy to export.

Utility model content

The utility model aims to solve the problem that the above problem, provides a kind of lithium battery cap, is improved by structure so that welding It is simple for process, efficient, the problem of not will produce hot pressing gas.

For this purpose, the utility model uses following technical scheme：

Lithium battery cap includes sealing ring, head cover, burst disk, insulated ring and orifice plate successively, is equipped with and uses below the orifice plate In the aluminium flake of welding, the aluminium flake is equipped with the circular first boss towards the orifice plate side, the orifice plate be equipped with The welding region of the first recess portion that the first boss matches, first recess portion is in contact with the burst disk.

Further, the burst disk is equipped with second boss, the welding region of the second boss and first recess portion It is in contact.

Further, the area of the second boss is greater than or equal to the area of the welding region of first recess portion.

Further, the orifice plate is equipped with buckle, and the buckle is for mutually fixing the orifice plate and the insulated ring.

Further, it is equipped with inside chimb at the edge of the insulated ring, which is used to encase the edge part of orifice plate Point.

Further, the insulated ring is equipped with the bulge loop extended to the burst disk side, and the burst disk is equipped with The second recess portion to match with the bulge loop.

Further, the edge of the burst disk is coated on the edge of the head cover, and is welded with exposure in bound edge position.

Further, the sealing ring is equipped with gas outlet.

Further, the burst disk is equipped with explosion-proof groove, and the orifice plate helps broken string, the explosion-proof quarter equipped with explosion-proof The explosion-proof pressure of line is more than the explosion-proof explosion-proof pressure for helping broken string.

Further, the explosion-proof groove and the explosion-proof section for helping broken string are in inverted trapezoidal structure.

The beneficial effects of the utility model are：The application carries out sealing welding using aluminium flake, by burst disk, orifice plate and aluminium Piece once welds, and simplifies welding procedure, simultaneously as being welded on external progress, can use ultrasonic bonding, can also use and swash Photocoagulation, and not will produce thermal stress and lead to weld non-uniform problem, it will not also make the internal hot gas that generates cause to prevent The risk of quick-fried stress deformation.

Description of the drawings

Fig. 1 is the cutting plane schematic diagram of the utility model lithium battery cap；

Fig. 2 is the overall structure diagram of the utility model lithium battery cap；

Fig. 3 is the whole decomposition diagram of the utility model lithium battery cap；

Fig. 4 is the aluminum sheet structure schematic diagram of the utility model lithium battery cap；

Fig. 5 is the orifice plate upper end formation schematic diagram of the utility model lithium battery cap；

Fig. 6 is the orifice plate lower end structure schematic diagram of the utility model lithium battery cap；

Fig. 7 is the burst disk upper end formation schematic diagram of the utility model lithium battery cap；

Fig. 8 is the burst disk lower end structure schematic diagram of the utility model lithium battery cap；

Fig. 9 is the insulated ring upper end formation schematic diagram of the utility model lithium battery cap；

Figure 10 is the insulated ring lower end structure schematic diagram of the utility model lithium battery cap.

In figure：1- sealing rings；2- head covers；3- burst disks；4- insulated rings；5- orifice plates；6- aluminium flakes；The gas outlets 11-；31- Two boss；The explosion-proof grooves of 32-；The second recess portions of 33-；41- bulge loops；42- chimbs；The first snap rings of 43-；The second snap rings of 44-；51- One recess portion；52- is explosion-proof to help broken string；53- is buckled；61- first boss.

Specific implementation mode

Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.

As shown in Fig. 1 to 10, lithium battery cap includes sealing ring 1, head cover 2, burst disk 3, insulated ring 4 and orifice plate successively 5,5 lower section of orifice plate is equipped with the aluminium flake 6 for welding, and aluminium flake 6 is equipped with the circular first boss 61 towards 5 side of orifice plate, hole Plate 5 is equipped with the first recess portion 51 to match with first boss 61, and the welding region of the first recess portion 51 is in contact with burst disk 3. The structure of first recess portion is that the position contacted with burst disk in the first recess portion forms circular welding region, i.e., quick-fried junction and aluminium flake It is all provided with and is set to circular weld region similar in area.The application using aluminium flake 6 carry out sealing welding, by burst disk 3, orifice plate 5 with And aluminium flake 6 once welds, and simplifies welding procedure, simultaneously as being welded on external progress, can use ultrasonic bonding, also may be used With with laser welding, and it not will produce thermal stress and lead to weld non-uniform problem, will not also make internal to generate hot gas Lead to the risk of 3 stress deformation of burst disk.

In order to be better achieved the purpose of welding, burst disk 3 is equipped with second boss 31, the second boss 31 and first recessed The welding region in portion 51 is in contact.Second boss 31 is to be shunk upwards from edge to central axis and form bullet circular top Structure, that is, form second boss, this structure setting brings following effect, first, making the welding position thickness of the first recess portion 51 It reduces, and so that entire welding temperature is reduced and ensure welding penetrability；Second is that the welding boss 31 for forming conical lower portion forms one The fixed bearing capacity to head cover side, prevents the Light deformation of burst disk.Further, it to prevent the planarization of welding surface, welds The area for connecing boss 31 is greater than or equal to the contact area of the first recess portion.

In order to preferably realize that safety anti-explosive, burst disk 31 are equipped with explosion-proof groove 32, orifice plate 5 helps broken string equipped with explosion-proof 52, the explosion-proof pressure of explosion-proof groove 32 is more than the explosion-proof explosion-proof pressure for helping broken string 52.That is, burst disk 3 and orifice plate 5 are in material When matter is identical, explosion-proof groove 32 or the explosion-proof depth for helping broken string 52 and explosion-proof pressure are in inverse ratio, i.e. explosion-proof pressure is bigger, explosion-proof quarter The depth of line is more shallow.So in depth explosion-proof groove 32 than it is explosion-proof help broken string 52 depth as shallow some.It is explosion-proof to help broken string 52 Effect is broken first under compression shock, leaves certain fracture space and fracture resistance to the fracture of burst disk 3, simultaneously It falls off after preventing burst disk 3 to be broken and contacts the risk to form secondary conduction with conductive materials such as box hats.Further, explosion-proof Groove 32 and it is explosion-proof help broken string 52 section be set as be in inverted trapezoidal structure, the meaning of this set is, first, by explosion-proof quarter The trapezoidal upper bottom width of line 32 enables the upper bottom at pressure contact end that pressure is imported into inside explosion-proof groove in bottom, and The width of bottom reduces, then the pressure of unit area just increases, helps to reduce lateral pull-off force, keeps fracture quick, prevent It is quick-fried clean thorough, residence time of the pressure inside battery steel shell is reduced, prevents pressure from transmitting the wind of hot pressing to the battery other end Danger.Second is that the selectivity with pressure direction and fracture location selectivity so that disconnect rapidly and cut in weak location when fracture The power-off of the disconnected battery, does not influence the normal use of other batteries.

To facilitate installation, being equipped with buckle 53 on orifice plate 5, buckle 53 is for fixing orifice plate 5 and 4 phase of insulated ring. Insulated ring 4 is equipped with the first snap ring 43 and the second snap ring 44, is respectively used to match with the first recess portion 51 of orifice plate 5 and buckle 53 And the two is made to be fixedly mounted, further, in order to ensure installation reliability, inside chimb is equipped at the edge of insulated ring 4 42, chimb 42 can encase the edge of orifice plate 5.

It is prominent equipped with extending to 3 side of burst disk on insulated ring 4 in order to keep insulated ring 4 and burst disk 3 easy for installation Bulge loop 41, burst disk is equipped with the second recess portion 33 for matching with the bulge loop 41.

In the present embodiment, sealing ring 1 is equipped with gas outlet 11, and gas is prevented to be sealed in inside block, and causes to answer Power is concentrated, and so that the structures such as burst disk 3 is in pressure and is tightly speeded state.

In the present embodiment, it is combined with binding structure between burst disk and head cover, and is welded with exposure in bound edge position Securely.

The technical principle of the utility model is described above in association with specific embodiment.These descriptions are intended merely to explain this reality With novel principle, and it cannot be construed to the limitation to scope of protection of the utility model in any way.Based on the explanation herein, Those skilled in the art would not require any inventive effort the other specific implementation modes that can associate the utility model, These modes are fallen within the scope of protection of the utility model.

Claims

1. lithium battery cap includes sealing ring successively（1）, head cover（2）, burst disk（3）, insulated ring（4）And orifice plate（5）, special Sign is, the orifice plate（5）Lower section is equipped with the aluminium flake for welding（6）, the aluminium flake（6）It is equipped with towards the orifice plate（5） The circular first boss of side（61）, the orifice plate（5）It is equipped with and the first boss（61）The first recess portion to match （51）, first recess portion（51）Welding region and the burst disk（3）It is in contact.

2. lithium battery cap as described in claim 1, which is characterized in that the burst disk（3）It is equipped with second boss（31）, The second boss（31）With first recess portion（51）Welding region be in contact.

3. lithium battery cap as claimed in claim 2, which is characterized in that the second boss（31）Area be greater than or equal to First recess portion（51）Welding region area.

4. lithium battery cap as claimed in claim 2, which is characterized in that the orifice plate（5）It is equipped with buckle（53）, the card Button（53）For by the orifice plate（5）With the insulated ring（4）It is mutually fixed.

5. lithium battery cap as claimed in claim 2, which is characterized in that in the insulated ring（4）Edge be equipped with it is inside Chimb（42）, the chimb（42）For encasing orifice plate（5）Marginal portion.

6. lithium battery cap as claimed in claim 2, which is characterized in that the insulated ring（4）It is equipped with to the burst disk （3）The bulge loop that side extends（41）, the burst disk（3）It is equipped with and the bulge loop（41）The second recess portion to match（33）.

7. lithium battery cap as claimed in claim 2, which is characterized in that the burst disk（3）Edge be coated on the top Lid（2）Edge, and in bound edge position laser welding.

8. lithium battery cap as claimed in claim 2, which is characterized in that the sealing ring（1）It is equipped with gas outlet（11）.

9. lithium battery cap as claimed in claim 2, which is characterized in that the burst disk（3）It is equipped with explosion-proof groove（32）, The orifice plate（5）Broken string is helped equipped with explosion-proof（52）, the explosion-proof groove（32）Explosion-proof pressure be more than and described explosion-proof help broken string （52）Explosion-proof pressure.

10. lithium battery cap as claimed in claim 9, which is characterized in that the explosion-proof groove（32）With it is described it is explosion-proof help it is disconnected Line（52）Section be in inverted trapezoidal structure.