CN201303010Y - Leakage-proof cover for lithium ion batteries - Google Patents
Leakage-proof cover for lithium ion batteries Download PDFInfo
- Publication number
- CN201303010Y CN201303010Y CNU2008201426923U CN200820142692U CN201303010Y CN 201303010 Y CN201303010 Y CN 201303010Y CN U2008201426923 U CNU2008201426923 U CN U2008201426923U CN 200820142692 U CN200820142692 U CN 200820142692U CN 201303010 Y CN201303010 Y CN 201303010Y
- Authority
- CN
- China
- Prior art keywords
- liquid injection
- injection hole
- steel ball
- diameter
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 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
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- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
The utility model relates to a leakage-proof cover for lithium ion batteries, which comprises a battery cover body and a sealing steel ball matched with the battery cover body, wherein, a liquid injection hole is formed on one side of the battery cover body. The cover is characterized in that the inner part of the liquid injection hole is in the shape of a circular truncated cone, that is, the diameter of the upper part of the inner part of the liquid injection hole is larger than that of the lower part thereof; and the liquid injection hole is sealed with the sealing steel ball in a matching manner. The ratio between the diameter of the upper part of the inner part of the liquid injection hole and the diameter of the sealing steel ball is (0.91-1) to 1; and the ratio between the diameter of the lower part of the inner part of the liquid injection hole and the diameter of the sealing steel ball is (0.8-0.9) to 1. The battery cover has the advantages that the structure of the battery cover is simple; the structural design of the specific circular truncated cone-shaped liquid injection hole is reasonable; the sealing effect of the steel ball is good without leakage and seepage; and the cover body has little possibility of deformation, so that the performance of a finished product of a battery is ensured to be safe and reliable, and the applicable range is wide. The utility model provides convenience for the large-scale and standardized production of products.
Description
Technical field
The utility model relates to a kind of portable lithium rechargeable battery, particularly a kind of anti-leakage lithium ion battery cap that improves battery sealing-performance.
Background technology
In recent years, along with the fast development of portable electric appts, power supply is had higher requirement.Because lithium rechargeable battery has the voltage height, advantages such as specific capacity is big, self discharge is little, in light weight, memoryless property enjoy the market favor.
Lithium rechargeable battery generally comprises electric core, integrated circuit board and battery external packing, and electric core is made up of positive pole, negative pole, electrolyte, barrier film and battery cap.At present, the battery cap is reserved the liquid injection hole of a certain size cylindrical shape in manufacturing process, uses the stainless steel bead that liquid injection hole is airtight after battery liquid-filling finishes.The electric core technology of this making ball and liquid injection hole are poorly sealed when causing battery leakage and pounding the pressure seal mouth ball more diastrophic problems of cap occur sealing through regular meeting, easily causes bad order simultaneously., how to solve by sealing the poorly sealed battery leakage that causes of ball and cap, pounding the cap buckling problem that the pressure seal mouth ball causes just becomes one of current urgent problem for this reason.
The utility model content
The purpose of this utility model be to provide a kind of simple in structure, effectively prevent battery cover distortion and improve the anti-leakage lithium ion battery cap of battery sealing-performance.
The technical scheme that the utility model adopted is for achieving the above object: a kind of anti-leakage lithium ion battery cap, comprise battery case lid and the sealed steel ball that is mated, described battery case lid one side is provided with liquid injection hole, it is characterized in that being round table-like in the described liquid injection hole, be that liquid injection hole internal upper part diameter is greater than lower diameter, with the sealed steel ball fitted seal that is provided with.
Described liquid injection hole upper diameter is 0.91-1 with the sealed steel ball diameter ratio that is set: 1; The liquid injection hole lower diameter is 0.8-0.9 with the sealed steel ball diameter ratio that is set: 1.
The beneficial effects of the utility model are: this battery cap is simple in structure, distinctive round table-like liquid injection hole reasonable in design uses steel ball sealing effective, and no leakage, liquid-impermeable and lid are not yielding, guarantee that effectively the battery end properties is safe and reliable, and the scope of application is extensive; The utility model easily forms product scale, standardized production.
Description of drawings
Fig. 1 is the utility model battery cap structure cross-sectional schematic;
Fig. 2 is the utility model structure elevational schematic view;
Fig. 3 is the utility model structure schematic top plan view;
Fig. 4 is the utility model lithium ion battery encapsulation pre-structure schematic diagram;
Fig. 5 is the utility model lithium ion battery encapsulation back structural representation;
Among the figure: 1 lid, 2 liquid injection holes, 3 sealed steel balls.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, details are as follows to embodiment, structure, feature that foundation the utility model provides:
As Fig. 1-shown in Figure 5, a kind of anti-leakage lithium ion battery cap, the sealed steel ball 3 that comprises battery case lid 1 and be mated, described battery case lid 1 one sides are provided with liquid injection hole 2, it is characterized in that being round table-like in the described liquid injection hole 2, be that liquid injection hole 2 internal upper part A diameters are greater than bottom B diameter, with sealed steel ball 3 fitted seal that are provided with.
Described liquid injection hole upper diameter is 0.91-1 with the sealed steel ball diameter ratio that is set: 1; The liquid injection hole lower diameter is 0.8-0.9 with the sealed steel ball diameter ratio that is set: 1.
Embodiment 1
In the enforcement, adopt conventional technology to make lithium ion battery cell.Electricity core positive pole is made up of lithium-metal composite oxides (cobalt acid lithium, LiMn2O4 etc.); Negative pole is made up of graphite, organic electrolyte, and be provided with metal battery shell.The battery cap as shown in Figure 1, the diameter at the A place, liquid injection hole 2 top of setting is 0.95 of sealed steel ball 3 diameters; The diameter at B place, liquid injection hole 2 bottom is 0.85 of sealed steel ball 3 diameters.The material that battery is required is packed institute in a certain order in the deserved battery case, adopts the battery cap of the utility model design; After cap and battery container weld and finish, electrolyte is injected by liquid injection hole according to required volume; And battery is encapsulated according to Fig. 4 and Fig. 5 schematic diagram.After battery changes into, the sealing effectiveness highly significant situation of lid distortion, liquid injection hole leakage do not appear fully.
Show distinctive round table-like liquid injection hole 2 structures as Fig. 1, described liquid injection hole 2 shapes have direct relation with size and sealed steel ball 3.The diameter at A place, liquid injection hole 2 top is identical with sealed steel ball 3 diameters; The diameter at B place, liquid injection hole 2 bottom is 0.80 of sealed steel ball 3 diameters.The material that battery is required is packed in the pairing battery case in a certain order, adopts the battery cap of the utility model design; After cap and housing weld and finish, electrolyte is injected by liquid injection hole according to required volume.According to Fig. 4 and Fig. 5 schematic diagram battery is encapsulated.After battery changes into, the sealing effectiveness highly significant situation of lid distortion, liquid injection hole leakage do not appear fully.
Above-mentioned detailed description of anti-leakage lithium ion battery cap being carried out with reference to embodiment; be illustrative rather than determinate; can make various specification as required; therefore in the variation and the modification that do not break away under the utility model general plotting, should belong within the protection range of the present utility model.
Claims (2)
1, a kind of anti-leakage lithium ion battery cap, comprise battery case lid and the sealed steel ball that is mated, described battery case lid one side is provided with liquid injection hole, it is characterized in that being round table-like in the described liquid injection hole, be that liquid injection hole internal upper part diameter is greater than lower diameter, with the sealed steel ball fitted seal that is provided with.
2, anti-leakage lithium ion battery cap according to claim 1 is characterized in that described liquid injection hole upper diameter and the sealed steel ball diameter ratio that is set are 0.91-1: 1; The liquid injection hole lower diameter is 0.8-0.9 with the sealed steel ball diameter ratio that is set: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201426923U CN201303010Y (en) | 2008-10-24 | 2008-10-24 | Leakage-proof cover for lithium ion batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201426923U CN201303010Y (en) | 2008-10-24 | 2008-10-24 | Leakage-proof cover for lithium ion batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201303010Y true CN201303010Y (en) | 2009-09-02 |
Family
ID=41086639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201426923U Expired - Fee Related CN201303010Y (en) | 2008-10-24 | 2008-10-24 | Leakage-proof cover for lithium ion batteries |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201303010Y (en) |
-
2008
- 2008-10-24 CN CNU2008201426923U patent/CN201303010Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090902 Termination date: 20121024 |