CN201262961Y - Lithium battery anode cover - Google Patents
Lithium battery anode cover Download PDFInfo
- Publication number
- CN201262961Y CN201262961Y CNU2008201350036U CN200820135003U CN201262961Y CN 201262961 Y CN201262961 Y CN 201262961Y CN U2008201350036 U CNU2008201350036 U CN U2008201350036U CN 200820135003 U CN200820135003 U CN 200820135003U CN 201262961 Y CN201262961 Y CN 201262961Y
- Authority
- CN
- China
- Prior art keywords
- diaphragm
- ring
- lithium battery
- cover plate
- ptc
- 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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- Secondary Cells (AREA)
Abstract
The utility model provides a lithium cell cathode cover which solves the sealing performance of a lithium cell and prevents the technical problem of the leakage of battery fluid. The cathode cover comprises a cover plate, a diaphragm, a sealing ring and an orifice plate which are arranged in sequence from up to down. The lithium cell cathode cover is characterized in that: a PTC ring is arranged between the cover plate and the diaphragm; a tipping insulating gasket is arranged around the cover plate; the periphery of the diaphragm is covered on the upper end face of the tipping insulating gasket so as to lead surface contact to be formed between the side face of the tipping side of the diaphragm and the sealing ring; compared with the line contact of the prior art, the lithium cell cathode cover has fairly good sealing effect, thus being capable of effectively preventing the leakage of battery fluid. The tipping insulating gasket has the function of isolating the diaphragm and the cover plate and leading conduction to be realized only through the PTC ring, and therefore leads the PTC to have the function of protection.
Description
Technical field
The utility model relates to a kind of lithium battery anode lid.
Background technology
Use PTC (PTC resistor) device as circuit protect expand device in case battery or circuit overcurrent condition and the superheat state that causes thus for example, U.S. Patent No. 4,255,698 and 4,973,936 and Japanese utility model application No.4-75287 in open, the PTC device comprises the PTC composition with " resistance positive temperature coefficient " characteristic.
The PTC composition makes the device that comprises this composition have following feature: device is at low resistance state under normal temperature, when because for example by short circuit or when overcharging the unusual big electric current that causes and overheated (for example 60-130 ℃), device converts high resistance states to.Therefore, comprise this PTC device in lithium battery, and unusual big electric current is when this lithium battery, this PTC device becomes the condition of high temperature, so it changes high resistance states into, so that reduce current in loop, thereby plays a protective role.
This PTC composition is known, does not need additional the description.Detailed description is referring to the open communique No.55-78406 of for example Japan Patent.For reference in this content of quoting this patent gazette.
Above-mentioned the deficiencies in the prior art part is: in the existing lithium battery anode lid, cover plate, diaphragm and sealing ring cause battery liquid to reveal for stacking gradually structure easily; And this positive cover is often undesirable in stress in the battery seal process, and positive cover deforms easily.
The utility model content
Technical problem to be solved in the utility model provides a kind of lithium battery anode lid, makes it have better seal, reveals to prevent battery liquid.
For solving the problems of the technologies described above, the utility model provides a kind of lithium battery anode lid, comprising: the cover plate of upper and lower settings, diaphragm, sealing ring and orifice plate successively; Be characterized in: be provided with the PTC ring between cover plate and the diaphragm, the cover plate periphery is provided with the bound edge insulation cushion, and the periphery bag of diaphragm is buckled on the upper surface of bound edge insulation cushion.
Described sealing ring inboard is provided with dead ring, and sealing ring separates setting with dead ring, or links to each other by 2～6 contiguous blocks.
The edge and the dead ring of described orifice plate are injection molded into one; Or the lower surface of described dead ring is provided with cannelure, and the edge of described orifice plate is located in this cannelure.
For reducing the lithium battery internal resistance and improve its consistency, described orifice plate and diaphragm are weldingly connected.
The utlity model has positive effect: in (1) lithium battery anode lid of the present utility model, the effect of the bound edge insulation cushion of cover plate periphery is isolation diaphragm and cover plate, makes therebetween and only can encircle conducting by PTC, thereby make PTC can have the effect of protection.The periphery bag of diaphragm is buckled on the upper surface of bound edge insulation cushion, thereby the formation face contacts between the side that makes the diaphragm bound edge and the sealing ring, with respect to line contact of the prior art, its sealing effectiveness obviously is preferably, therefore the utility model has solved the edge sealing problem between sealing ring and the inner body, can effectively prevent the leakage of battery liquid.(2) in the utility model, the bound edge insulation cushion can be injection-moulded in the cover plate periphery, so that produce and install.(3) in the utility model, sealing ring separates with insulated ring.In the installation process of lithium battery, sealing ring is subject to external compression and is out of shape, if sealing ring and insulated ring are wholely set, then insulated ring easily pushes and make the solder joint fracture of orifice plate and diaphragm to the centre in the installation process of lithium battery, thereby causes this lithium battery to be scrapped.And separate with insulated ring when being provided with when sealing ring, even if sealing ring is subjected to external compression and is out of shape, insulated ring is pushed to the centre, therefore improved the product qualified rate that lithium battery is installed.Sealing ring also can link to each other by 2～6 contiguous blocks with insulated ring, and sealing ring is subjected to external compression and when being out of shape, insulated ring is less to the amplitude of centre extruding, so also can improve the product qualified rate of lithium battery installation.(4) in the utility model, have 2～4 air vent holes on the orifice plate, so that air pressure in the battery and heat are conducted on the diaphragm, both be beneficial to explosion-proofly, be beneficial to heat radiation again.
Description of drawings
Fig. 1 is the front view of lithium battery anode lid of the present utility model.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 is the rearview of lithium battery anode lid among Fig. 1.
Embodiment
(embodiment 1)
See Fig. 1-3, the lithium battery cap assembly of present embodiment comprises: the cover plate 1 of upper and lower settings, PTC ring 2, diaphragm 3, sealing ring 5 and orifice plate 4 successively.
Be provided with PTC ring 2 between cover plate 1 and the diaphragm 3, cover plate 1 peripheral 1-1 is provided with bound edge insulation cushion 6, and the effect of bound edge insulation cushion 6 is isolation diaphragm 3 and cover plate 1, makes therebetween and only can encircle 2 conductings by PTC, thereby make PTC can have the effect of protection.
The peripheral 3-2 bag of diaphragm 3 is buckled on the upper surface of bound edge insulation cushion 6, thereby the formation face contacts between the bound edge side that makes diaphragm 3 and the sealing ring 5, with respect to line contact of the prior art, its sealing effectiveness obviously is preferably, therefore the lithium battery cap assembly of present embodiment has solved the edge sealing problem between sealing ring 5 and the inner body, can effectively prevent the leakage of battery liquid.
Described sealing ring 5 inboards are provided with dead ring 5-1, and sealing ring 5 separates setting with dead ring 5-1, or link to each other by 2～6 contiguous blocks.
The edge of described orifice plate 4 and dead ring 5-1 are injection molded into one; Or the lower surface of described dead ring 5-1 is provided with cannelure, and the edge of described orifice plate 4 is located in this cannelure.
Described orifice plate 4 links to each other with diaphragm 3 ultrasonic bonding, significantly to reduce the lithium battery internal resistance and to improve its consistency.
Obviously, the foregoing description of the present utility model only is for the utility model example clearly is described, and is not to be qualification to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that spirit of the present utility model extended out and still are among the protection range of the present utility model.
Claims (4)
1, a kind of lithium battery anode lid comprises: the cover plate of upper and lower settings (1), diaphragm (3), sealing ring (5) and orifice plate (4) successively;
It is characterized in that: be provided with PTC ring (2) between cover plate (1) and the diaphragm (3), cover plate (1) periphery (1-1) is provided with bound edge insulation cushion (6), and periphery (3-2) bag of diaphragm (3) is buckled on the upper surface of bound edge insulation cushion (6).
2, lithium battery anode lid according to claim 1, it is characterized in that: described sealing ring (5) inboard is provided with dead ring (5-1), and sealing ring (5) separates setting with dead ring (5-1), or links to each other by 2～6 contiguous blocks.
3, lithium battery anode lid according to claim 2, it is characterized in that: the edge of described orifice plate (4) and dead ring (5-1) are injection molded into one; Or the lower surface of described dead ring (5-1) is provided with cannelure, and the edge of described orifice plate (4) is located in this cannelure.
4, lithium battery anode lid according to claim 1 and 2, it is characterized in that: described orifice plate (4) is weldingly connected with diaphragm (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201350036U CN201262961Y (en) | 2008-08-26 | 2008-08-26 | Lithium battery anode cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201350036U CN201262961Y (en) | 2008-08-26 | 2008-08-26 | Lithium battery anode cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201262961Y true CN201262961Y (en) | 2009-06-24 |
Family
ID=40809438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201350036U Expired - Fee Related CN201262961Y (en) | 2008-08-26 | 2008-08-26 | Lithium battery anode cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201262961Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916832A (en) * | 2010-08-09 | 2010-12-15 | 天津佰特瑞电子有限公司 | Three-level protective lithium ion battery cover |
| WO2011022972A1 (en) * | 2009-08-26 | 2011-03-03 | 比克国际(天津)有限公司 | Combination cover of battery and battery |
| CN107293687A (en) * | 2016-04-11 | 2017-10-24 | 三星Sdi株式会社 | Secondary cell |
-
2008
- 2008-08-26 CN CNU2008201350036U patent/CN201262961Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011022972A1 (en) * | 2009-08-26 | 2011-03-03 | 比克国际(天津)有限公司 | Combination cover of battery and battery |
| CN101916832A (en) * | 2010-08-09 | 2010-12-15 | 天津佰特瑞电子有限公司 | Three-level protective lithium ion battery cover |
| CN107293687A (en) * | 2016-04-11 | 2017-10-24 | 三星Sdi株式会社 | Secondary cell |
| CN107293687B (en) * | 2016-04-11 | 2021-11-23 | 三星Sdi株式会社 | Secondary battery |
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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: 20090624 Termination date: 20120826 |