CN206313033U - A kind of liquid injection hole of lithium ion battery - Google Patents
A kind of liquid injection hole of lithium ion battery Download PDFInfo
- Publication number
- CN206313033U CN206313033U CN201720045733.6U CN201720045733U CN206313033U CN 206313033 U CN206313033 U CN 206313033U CN 201720045733 U CN201720045733 U CN 201720045733U CN 206313033 U CN206313033 U CN 206313033U
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- CN
- China
- Prior art keywords
- injection hole
- liquid injection
- flanging bore
- steel ball
- lithium ion
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- 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.)
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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)
- Filling, Topping-Up Batteries (AREA)
Abstract
The utility model is related to a kind of liquid injection hole of lithium ion battery, the liquid injection hole is arranged on battery cover board, it is characterized in that, the liquid injection hole is constituted by toroidal cavity and with the close-fitting flanging bore of steel ball, the toroidal cavity is set on the cover board, the center of toroidal cavity is provided with flanging bore, the afterbody of the flanging bore sets up necking, the wall depth of the toroidal cavity is 0.4~0.8mm, the height of the flanging bore is 1.5~1.8 times of cover sheet thickness, the 0.85~0.95 of a diameter of flange bore dia of the necking bottom.The design of the utility model flanging bore increases the position of fixed steel ball, and the necking of flanging bore afterbody effectively prevents steel ball from falling into inside battery, the utility model good sealing effect, safe, simple structure, practical.
Description
Technical field
The utility model belongs to lithium battery technology field, more particularly to a kind of liquid injection hole of lithium ion battery.
Background technology
With the extensive use of lithium ion battery, people propose requirement higher to the performance of lithium ion battery, and note
Fluid apertures Sealing Technology is the key factor for influenceing performance of lithium ion battery.The liquid injection hole design of major part lithium ion battery at present exists
On cover plate, sealed using steel ball, when steel ball is sealed, steel ball fixed bit can only be punched the euphotic belt of section in liquid injection hole, and normal
Euphotic belt accounts for the 30% of whole punching section during punching press, and precision stamping can just account for more than 80%, and the thickness of usual cover plate is a 2mm left sides
The right side, therefore the fixed range of steel ball only has 0.6~1.6mm, not only bad for liquid injection hole sealing, causes battery leakage, Er Qiegang
Pearl also easily falls into inside battery, influences the security of battery.
Chinese patent CN201153135Y discloses a kind of improvement of battery cover board electrolyte filling hole structure, including located at battery cover
Liquid injection hole on plate, the liquid injection hole is trapezium structure, and the bottom size of the liquid injection hole is small compared with its top dimension, therefore loads steel
During pearl, steel ball will not fall into inside battery, and steel ball can be combined more closely with cover plate, but steel ball consolidates in the liquid injection hole
Liquid injection hole is easily ejected after set a distance is short, and steel ball bottom is pressurized, sealing effectiveness is poor, easily causes battery leakage.
Chinese patent 203826439U discloses a kind of lithium ion battery cover board, including liquid injection hole, the liquid injection hole bottom
Face is provided with downwardly convex convex closure, and described convex closure is spherical or inverted round platform, and described liquid injection hole top is cylinder
Shape hole, bottom is funnel-shaped hole, and the depth of cylindrical hole is identical with cover sheet thickness.The liquid injection hole increases convex closure and designs so that steel ball
Path in liquid injection hole lengthens, if pressure is excessive, steel ball will not also fall into inside battery, but the fixed range of steel ball is simultaneously
Without increase.
Chinese patent CN203085674U discloses a kind of liquid injection hole of rectangular lithium ion battery core, described rectangular lithium ion
The liquid injection hole of battery core includes the liquid injection hole being located on battery core cover plate, and the thickness of described liquid injection hole is at least the diameter of a sealing ball
2 times, the liquid injection hole of the rectangular lithium ion battery core described in the utility model is thickeied due to thickness, is embedded in enough two or more
Sealing ball, so as to effectively increase the security of battery, but not only difficulty of processing is big for this liquid injection hole, and also reduces
Fluid injection efficiency.
Therefore, in the urgent need to developing, a kind of steel ball fixed range is long and steel ball is difficult to fall into the liquid injection hole of inside battery at present
Structure, so as to ensure the sealing of lithium-ion-power cell liquid injection hole, it is to avoid battery leakage, it is ensured that the security of battery.
Utility model content
In order to steel ball fixed range is short when solving the problems, such as that existing liquid injection hole is sealed, steel ball easily falls into inside battery, this reality
A kind of liquid injection hole of lithium ion battery is proposed with new.
The utility model is to realize that above-mentioned target is adopted the technical scheme that：
A kind of liquid injection hole of lithium ion battery, the liquid injection hole is arranged on battery cover board, it is characterised in that the fluid injection
Hole constitutes by toroidal cavity and with the close-fitting flanging bore of steel ball, and the toroidal cavity is set on the cover board, annular
The center of groove is provided with flanging bore, and the afterbody of the flanging bore sets up necking.
The wall depth of the toroidal cavity is 0.4~0.8mm.
The height of the flanging bore is 1.5~1.8 times of cover sheet thickness.
The 0.85~0.95 of a diameter of flange bore dia of the necking bottom.
The beneficial effects of the utility model：1st, the design of flanging bore causes that fixing steel ball position increases, and can effectively seal
Liquid injection hole；2nd, the design of flanging bore causes that fixing steel ball position increases, and steel ball bottom is difficult to be ejected from liquid injection hole when being pressurized；3、
The necking of flanging bore afterbody prevents steel ball from falling into inside battery, increases the security of battery；4th, the utility model simple structure, reality
It is strong with property.
Brief description of the drawings
Fig. 1 is the utility model structural representation；
Fig. 2 is the utility model liquid injection hole enlarged drawing；
Fig. 3 is traditional liquid injection hole enlarged drawing；
Fig. 4 is trapezoidal liquid injection hole enlarged drawing；
Fig. 5 is infundibulate liquid injection hole enlarged drawing；
In figure：1st, cover plate 2, toroidal cavity 3, steel ball 4, flanging bore 5, necking
Specific embodiment
Steel ball fixed range when existing liquid injection hole is sealed is short, steel ball easily falls into inside battery in order to solve for the utility model
A kind of problem, it is proposed that liquid injection hole of lithium ion battery.This practicality is expanded on further with reference to diagram and specific embodiment new
Type.
As depicted in figs. 1 and 2, a kind of liquid injection hole of lithium ion battery, the liquid injection hole is arranged on battery cover board (1),
Characterized in that, the liquid injection hole is constituted by toroidal cavity (2) and with steel ball (3) close-fitting flanging bore (4), the circle
Annular groove (2) is arranged on cover plate (1), and the center of toroidal cavity (2) is provided with flanging bore (4), the flanging bore (4)
Afterbody set up necking (5).
The wall depth of the toroidal cavity (2) is 0.4~0.8mm.
The height of the flanging bore (4) is 1.5~1.8 times of cover plate (1) thickness.
Necking (5) base diameter is the 0.85~0.95 of flanging bore (4) diameter.
In following comparative examples and embodiment, battery cover board thickness is 2mm, and diameter of the steel ball is 3.175mm.
Steel ball fixed range uses miking in following comparative examples and embodiment.
Comparative example 1
As shown in figure 3, the liquid injection hole of conventional lithium ion battery, liquid injection hole is arranged on battery cover board, liquid injection hole height etc.
In cover sheet thickness, a diameter of 3.1 ± 0.02mm of liquid injection hole, it is assumed that euphotic belt accounts for the 80% of whole punching section, the fixation of steel ball
Distance also only has 1.6mm, and liquid injection hole sealing difference easily causes battery leakage, and steel ball also easily falls into inside battery, deposits
In potential safety hazard.
Comparative example 2
As shown in figure 4, a kind of trapezium structure liquid injection hole, liquid injection hole is arranged on battery cover board, the liquid injection hole top to
In gradually tapering up, liquid injection hole top diameter is 3.1 ± 0.02mm for its bottom, and base diameter is 2.9 ± 0.02mm, and liquid injection hole is highly
Equal to cover sheet thickness, although trapezoidal liquid injection hole effectively prevents battery from falling into inside battery, the fixed range of steel ball is most
Also there was only 1.6mm, and easily gone out liquid injection hole during the compression of steel ball bottom, liquid injection hole sealing difference easily causes battery leakage.
Comparative example 3
As shown in figure 5, a kind of infundibulate liquid injection hole, described liquid injection hole top is cylindrical hole, and bottom is funnel-shaped hole,
The depth of cylindrical hole is identical with cover sheet thickness, a diameter of 3.1 ± 0.02mm of liquid injection hole, and funnel bottom a diameter of 2.9 ±
0.02mm, infundibulate liquid injection hole effectively prevents steel ball to fall into inside battery, does not increase steel ball fixed range, note unfortunately
The sealing of fluid apertures is unsatisfactory.
Embodiment 1
As depicted in figs. 1 and 2, a kind of liquid injection hole of lithium ion battery, the liquid injection hole is by toroidal cavity and flanging bore
Composition, the toroidal cavity is set on the cover board, and toroidal cavity wall depth is 0.6mm, the center of toroidal cavity
Flanging bore is provided with, a diameter of 3.1 ± 0.02mm of flanging bore is highly 3mm, and the afterbody of the flanging bore sets up necking, necking bottom
A diameter of 2.9 ± the 0.02mm in portion.The utility model, can by designing flanging bore so that steel ball fixed range increases to more than 2mm
Effective sealing liquid injection hole, and due to the increase of steel ball fixed range, steel ball is difficult to be ejected liquid injection hole, and flanging bore bottom is set
Necking effectively prevents steel ball to fall into inside battery, increases the security of battery.
Claims (4)
1. a kind of liquid injection hole of lithium ion battery, the liquid injection hole is arranged on battery cover board (1), it is characterised in that the note
Fluid apertures is constituted by toroidal cavity (2) and with steel ball (3) close-fitting flanging bore (4), and the toroidal cavity (2) is arranged on
On cover plate (1), the center of toroidal cavity (2) is provided with flanging bore (4), and the afterbody of the flanging bore (4) sets up necking
(5)。
2. a kind of liquid injection hole of lithium ion battery according to claim 1, it is characterised in that the toroidal cavity (2)
Wall depth be 0.4~0.8mm.
3. a kind of liquid injection hole of lithium ion battery according to claim 1, it is characterised in that the height of the flanging bore (4)
Spend is 1.5~1.8 times of cover plate (1) thickness.
4. the liquid injection hole of a kind of lithium ion battery according to claim 1, it is characterised in that necking (5) bottom is straight
Footpath is the 0.85~0.95 of flanging bore (4) diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720045733.6U CN206313033U (en) | 2017-01-05 | 2017-01-05 | A kind of liquid injection hole of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720045733.6U CN206313033U (en) | 2017-01-05 | 2017-01-05 | A kind of liquid injection hole of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206313033U true CN206313033U (en) | 2017-07-07 |
Family
ID=59248299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720045733.6U Active CN206313033U (en) | 2017-01-05 | 2017-01-05 | A kind of liquid injection hole of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206313033U (en) |
-
2017
- 2017-01-05 CN CN201720045733.6U patent/CN206313033U/en active Active
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