CN113540631A - Integrated injection molding cylindrical lithium ion battery explosion-proof cap - Google Patents
Integrated injection molding cylindrical lithium ion battery explosion-proof cap Download PDFInfo
- Publication number
- CN113540631A CN113540631A CN202110795740.9A CN202110795740A CN113540631A CN 113540631 A CN113540631 A CN 113540631A CN 202110795740 A CN202110795740 A CN 202110795740A CN 113540631 A CN113540631 A CN 113540631A
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- Prior art keywords
- explosion
- proof
- welding
- lithium ion
- ion battery
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 23
- 238000001746 injection moulding Methods 0.000 title claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 59
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 41
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 239000007789 gas Substances 0.000 claims description 9
- 239000011261 inert gas Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses an integrated injection molding cylindrical lithium ion battery explosion-proof cap which comprises a top cover, an explosion-proof piece and a sealing ring, wherein the upper surface of the top cover is provided with a plurality of air holes, the explosion-proof piece is fixedly connected with the top cover, the explosion-proof piece is embedded into the sealing ring, the bottom end of the sealing ring is fixedly connected with a small aluminum sheet, the small aluminum sheet is provided with a plurality of through holes, the integrated injection molding cylindrical lithium ion battery explosion-proof cap also comprises a plurality of welding blocks, the lower surface of the explosion-proof piece is provided with a plurality of bulges, and one ends of the bulges penetrate through the center points of the welding blocks and are welded with the small aluminum sheet; according to the invention, the plurality of the protruding parts are arranged and are welded with the small aluminum sheet, so that the welding space between the small aluminum sheet and the explosion-proof sheet can be increased, the process requirement is reduced during welding, the welding is convenient, the production and the processing are facilitated, the welding points between the small aluminum sheet and the explosion-proof sheet can be increased by arranging the plurality of the protruding parts, and the welding firmness is improved.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to an integrated injection molding cylindrical lithium ion battery explosion-proof cap.
Background
The lithium cell is green's novel energy storage battery, it is big to have energy density, long service life, operating voltage is high, long cycle life, little, no memory effect, advantages such as feature of environmental protection height of self-discharging, in electronic technology, electric automobile, the energy storage, emergency power source, there is extensive application in fields such as war industry aerospace, the lithium ion battery cap is lithium ion battery's key component, it is the performance that directly relates to lithium ion battery, however, current integral type injection moulding cylinder lithium ion battery explosion-proof cap still has some not enoughly, for example:
1. in the prior art, the positions of the small aluminum sheet and the explosion-proof sheet are narrow, so that the welding is difficult to carry out during welding, the process requirements are improved, and the production and the processing are not facilitated.
2. In the prior art, the welding point between the small aluminum sheet and the explosion-proof sheet is easy to rust, so that the explosion-proof sheet is separated from the small aluminum sheet, the service life of the battery cap is shortened, and the service life of the lithium battery is further shortened.
Disclosure of Invention
The invention aims to provide an integrated injection molding cylindrical lithium ion battery explosion-proof cap, which solves the technical problem that welding is difficult to perform due to the narrow positions of a small aluminum sheet and an explosion-proof sheet.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an explosion-proof cap of integral type injection moulding cylinder lithium ion battery, includes top cap, explosion-proof piece and sealing washer, the upper surface of top cap is provided with a plurality of gas pocket, the explosion-proof piece with top cap fixed connection, the explosion-proof piece is embedded into inside the sealing washer, the little aluminum sheet of bottom fixedly connected with of sealing washer, be provided with a plurality of through-hole on the little aluminum sheet, still include a plurality of welded block, the lower surface of explosion-proof piece is provided with a plurality of bellying, the one end of bellying is passed the central point of welded block with little aluminum sheet welding, the welded block is hollow structure, the inside packing of welded block has inert gas.
Preferably, the periphery of the explosion-proof sheet is provided with a bending part, and the bending part is wrapped on the edge of the top cover.
Preferably, the lower surface of explosion-proof piece is provided with a plurality of stopper, the surface of the inner wall of sealing washer is provided with a plurality of spacing groove, the spacing groove with the position of stopper is corresponding, the one end of stopper with the spacing groove is pegged graft, and the stopper with the space packing of spacing groove has sealed glue.
Preferably, the edge of sealing washer is provided with the parcel portion, the parcel portion parcel the kink of explosion-proof piece.
Preferably, the top cover is welded with the explosion-proof sheet.
Preferably, a sealant is filled between the explosion-proof sheet and the sealing ring.
Preferably, the top cap is the structure of several fonts, the gas pocket is equipped with six altogether, and six gas pockets are circular arrangement structure evenly distributed and are in the surface of top cap.
Preferably, laser spot welding or ultrasonic welding is adopted between the bulge part and the small aluminum sheet.
Preferably, an insulating sleeve is arranged between the inner surface of the wrapping portion flanging structure and the explosion-proof sheet and is adhered to the inner surface of the wrapping portion flanging structure.
Preferably, the sealing ring is a plastic sealing ring and is wrapped by the end part of the battery steel shell.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the plurality of the protruding parts are arranged and are welded with the small aluminum sheet, so that the welding space between the small aluminum sheet and the explosion-proof sheet can be increased, the process requirement is reduced during welding, the welding is convenient, the production and the processing are facilitated, the welding points between the small aluminum sheet and the explosion-proof sheet can be increased by arranging the plurality of the protruding parts, and the welding firmness is improved.
2. According to the invention, the welding points of the small aluminum sheet and the explosion-proof sheet are arranged on the inner wall of the welding block, meanwhile, the inert gas, such as nitrogen, helium and the like, is filled in the welding block, so that the welding points of the small aluminum sheet and the explosion-proof sheet are prevented from being corroded, the explosion-proof sheet and the small aluminum sheet can be prevented from being separated, the service life of the battery cap is prolonged, and the service life of the lithium battery is further prolonged.
Drawings
FIG. 1 is a schematic cross-sectional front view of the present invention;
FIG. 2 is a schematic top view of the top cover of the present invention;
fig. 3 is an enlarged schematic view of a portion a in fig. 1.
In the figure: 1-a top cover; 11-air holes; 2-explosion-proof piece; 21-a boss; 22-a bending part; 23-a limiting block; 3-sealing ring; 31-a limiting groove; 32-a wrapping section; 4-small aluminum sheet; 5-welding the blocks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: an integral injection molding cylindrical lithium ion battery explosion-proof cap comprises a top cover 1, an explosion-proof sheet 2 and a sealing ring 3, wherein the upper surface of the top cover 1 is provided with a plurality of air holes 11, the explosion-proof sheet 2 is fixedly connected with the top cover 1, the explosion-proof sheet 2 is embedded into the sealing ring 3, the bottom end of the sealing ring 3 is fixedly connected with a small aluminum sheet 4, the small aluminum sheet 4 is provided with a plurality of through holes, the explosion-proof cap also comprises a plurality of welding blocks 5, the lower surface of the explosion-proof sheet 2 is provided with a plurality of bulges 21, one end of each bulge 21 penetrates through the center point of the welding block 5 to be welded with the small aluminum sheet 4, the welding block 5 is of a hollow structure, the inside of the welding block 5 is filled with inert gas, the bulges 21 are provided with the bulges and are welded with the small aluminum sheet 4, the welding space between the small aluminum sheet 4 and the explosion-proof sheet 2 can be increased, the technological requirements are reduced during welding, and the welding is convenient, be favorable to the production and processing, through being provided with a plurality of bellying 21, can increase the welding point between small aluminum sheet 4 and explosion-proof piece 2, improve welded fastness, through being provided with a plurality of welded block 5, and set up the welding point of small aluminum sheet 4 and explosion-proof piece 2 at the inner wall of welded block 5, and simultaneously, fill inert gas in the inside of welded block 5, can be nitrogen gas, helium, avoid small aluminum sheet 4 and explosion-proof piece 2's welding point to take place the corrosion, thereby can avoid explosion-proof piece 2 to separate with small aluminum sheet 4, the life of battery cap has been prolonged, the life of lithium cell has further been prolonged.
Wherein, the periphery of explosion-proof piece 2 is provided with kink 22, and kink 22 parcel is on top cap 1's edge, through wrapping up top cap 1's edge on the kink 22 of explosion-proof piece 2, can increase the stability that top cap 1 and explosion-proof piece 2 are connected, when welding top cap 1 and explosion-proof piece 2, brings the convenience.
Wherein, the lower surface of explosion-proof piece 2 is provided with a plurality of stopper 23, the surface of the inner wall of sealing washer 3 is provided with a plurality of spacing groove 31, spacing groove 31 is corresponding with stopper 23's position, stopper 23's one end is pegged graft with spacing groove 31, and stopper 23 and spacing groove 31's space packing has sealed glue, through being provided with stopper 23 and spacing groove 31, can carry out spacing fixed at first through stopper 23 with explosion-proof piece 2, further bring the convenience when welding explosion-proof piece 2.
Wherein, the edge of sealing washer 3 is provided with parcel portion 32, and the stability of being connected between sealing washer 3 and explosion-proof piece 2 and the top cap 1 can be increased to the kink 22 of parcel portion 32 parcel explosion-proof piece 2.
Wherein, the top cover 1 is welded with the explosion-proof sheet 2.
And sealant is filled between the explosion-proof sheet 2 and the sealing ring 3.
Wherein, top cap 1 is the structure of several fonts, and gas pocket 11 is equipped with six altogether, and six gas pockets 11 are the even distribution of circular arrangement structure on top cap 1's surface.
Wherein, laser spot welding or ultrasonic welding is adopted between the convex part 21 and the small aluminum sheet 4.
Wherein, establish insulating cover between the internal surface of parcel portion 32 turn-ups structure and explosion-proof piece 2, and insulating cover pastes with the internal surface of parcel portion 32 turn-ups structure.
Wherein, sealing washer 3 is the plastics seal circle, wraps up by the tip of battery steel casing.
The working principle is as follows: when in use, the welding space between the small aluminum sheet 4 and the explosion-proof sheet 2 can be increased by arranging the plurality of convex parts 21 and welding the convex parts 21 with the small aluminum sheet 4, the process requirement is reduced during welding, the welding is convenient, the production and the processing are facilitated, the welding point between the small aluminum sheet 4 and the explosion-proof sheet 2 can be increased by arranging the plurality of convex parts 21, the welding firmness of the welding is improved, the welding point between the small aluminum sheet 4 and the explosion-proof sheet 2 is arranged on the inner wall of the welding block 5 by arranging the plurality of welding blocks 5, meanwhile, the inert gas is filled in the welding block 5, such as nitrogen gas, helium gas and the like, the corrosion of the welding point between the small aluminum sheet 4 and the explosion-proof sheet 2 is avoided, the separation of the explosion-proof sheet 2 and the small aluminum sheet 4 is avoided, the service life of the battery cap is prolonged, and the service life of the lithium battery is further prolonged, through wrapping up the edge of top cap 1 on the kink 22 of explosion-proof piece 2, can increase the stability that top cap 1 and explosion-proof piece 2 are connected, when welding top cap 1 and explosion-proof piece 2, bring the convenience, through being provided with stopper 23 and spacing groove 31, can carry out spacing fixed through stopper 23 with explosion-proof piece 2 at first, further bring the convenience when welding explosion-proof piece 2.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an explosion-proof cap of integral type injection moulding cylinder lithium ion battery, includes top cap (1), explosion-proof piece (2) and sealing washer (3), the upper surface of top cap (1) is provided with a plurality of gas pocket (11), explosion-proof piece (2) with top cap (1) fixed connection, explosion-proof piece (2) are embedded into inside sealing washer (3), the bottom fixedly connected with small aluminum sheet (4) of sealing washer (3), be provided with a plurality of through-hole on small aluminum sheet (4), its characterized in that: still include a plurality of welding piece (5), the lower surface of explosion-proof piece (2) is provided with a plurality of bellying (21), the one end of bellying (21) is passed the central point of welding piece (5) with small aluminum sheet (4) welding, welding piece (5) are hollow structure, the inside packing of welding piece (5) has inert gas.
2. The explosion-proof cap of integral injection molding cylindrical lithium ion battery of claim 1, characterized in that: the periphery of the explosion-proof sheet (2) is provided with a bending part (22), and the bending part (22) is wrapped on the edge of the top cover (1).
3. The explosion-proof cap of integral injection molding cylindrical lithium ion battery of claim 1, characterized in that: the lower surface of explosion-proof piece (2) is provided with a plurality of stopper (23), the surface of the inner wall of sealing washer (3) is provided with a plurality of spacing groove (31), spacing groove (31) with the position of stopper (23) is corresponding, the one end of stopper (23) with spacing groove (31) are pegged graft, and stopper (23) with the space packing of spacing groove (31) has sealed glue.
4. The explosion-proof cap of integral injection molding cylindrical lithium ion battery of claim 1, characterized in that: the edge of sealing washer (3) is provided with parcel portion (32), parcel portion (32) parcel kink (22) of explosion-proof piece (2).
5. The explosion-proof cap of integral injection molding cylindrical lithium ion battery of claim 1, characterized in that: the top cover (1) is welded with the explosion-proof sheet (2).
6. The explosion-proof cap of integral injection molding cylindrical lithium ion battery of claim 1, characterized in that: and a sealant is filled between the explosion-proof sheet (2) and the sealing ring (3).
7. The explosion-proof cap of integral injection molding cylindrical lithium ion battery of claim 1, characterized in that: top cap (1) is a structure of type of calligraphy of several, gas pocket (11) are equipped with six altogether, and six gas pockets (11) are circular arrangement structure evenly distributed and are in the surface of top cap (1).
8. The explosion-proof cap of integral injection molding cylindrical lithium ion battery of claim 1, characterized in that: the bulge (21) and the small aluminum sheet (4) are welded by laser spot welding or ultrasonic welding.
9. The explosion-proof cap of integral injection molding cylindrical lithium ion battery of claim 4, characterized in that: an insulating sleeve is arranged between the inner surface of the flanging structure of the wrapping portion (32) and the explosion-proof sheet (2), and the insulating sleeve is adhered to the inner surface of the flanging structure of the wrapping portion (32).
10. The explosion-proof cap of integral injection molding cylindrical lithium ion battery of claim 1, characterized in that: the sealing ring (3) is a plastic sealing ring and is wrapped by the end part of the battery steel shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110795740.9A CN113540631B (en) | 2021-07-14 | 2021-07-14 | Integrated injection molding cylindrical lithium ion battery explosion-proof cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110795740.9A CN113540631B (en) | 2021-07-14 | 2021-07-14 | Integrated injection molding cylindrical lithium ion battery explosion-proof cap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113540631A true CN113540631A (en) | 2021-10-22 |
| CN113540631B CN113540631B (en) | 2022-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110795740.9A Active CN113540631B (en) | 2021-07-14 | 2021-07-14 | Integrated injection molding cylindrical lithium ion battery explosion-proof cap |
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2021
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| JPH08238588A (en) * | 1995-02-28 | 1996-09-17 | Nisshin Steel Co Ltd | Inside surface shielding jig for pipe making by laser welding |
| JPH0913124A (en) * | 1995-06-26 | 1997-01-14 | Nippon Sanso Kk | Method for modifying stainless steel welds |
| US6281464B1 (en) * | 1998-10-23 | 2001-08-28 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process and apparatus for welding a hollow structure, such as a container or a tube, with inerting of its internal structure |
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| Publication number | Publication date |
|---|---|
| CN113540631B (en) | 2022-12-06 |
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