CN2793932Y - Explosive-proof cover of battery - Google Patents
Explosive-proof cover of battery Download PDFInfo
- Publication number
- CN2793932Y CN2793932Y CN200520057977.3U CN200520057977U CN2793932Y CN 2793932 Y CN2793932 Y CN 2793932Y CN 200520057977 U CN200520057977 U CN 200520057977U CN 2793932 Y CN2793932 Y CN 2793932Y
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- Prior art keywords
- battery
- curved surface
- ring
- lid according
- battery anti
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- Expired - Fee Related
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- Y02E60/12—
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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model relates to a battery, particularly to an explosive-proof cover of a cylindrical lithium ion battery. The inner part of the end opening of a battery steel shell is provided with a sealing ring along a circumferential direction, and an upper cover, a ring, and a rupture disk are orderly embedded arranged in the groove of the sealing ring; the lower part of the rupture disk is provided with a ventilating pore plate, the inner flange of the ring of the rupture disk is connected to the flange of a middle curved surface, and the cross section of the middle curved surface along a radial direction is in double camber connection. Compared with the prior art, the utility model has the advantages that the inner flange of the ring of the rupture disk is connected to the flange of the middle curved surface, and thus, when the inner pressure of the battery is increased, the reliable tearing of the middle curved surface along the flange can be ensured; the cross section of the middle curved surface along a radial direction is in double camber connection, so the stable reversed pressure of the rupture disk can be ensured, and the separation pressure is coincident. The leak-proof circular bulge of a sealing surface enhances leak-proof sealing effect, welding drum points arranged in the welding zone of the ventilating pore plate ensure welding coincidence, and the minimum fluctuation of explosive-proof force can be fulfilled.
Description
Technical field
The utility model relates to the Explosion-proof cap of a kind of battery, particularly a kind of cylindrical lithium ion battery.
Background technology
At present column type semitight battery, and guarantees the fail safe of battery not only as anode with battery cover, contains a positive temperature coefficient resistor in the battery cover, when battery in normal temperature following time, its resistance value is almost nil; When the battery temperature rising reached certain value, it is infinitely great that its resistance value is approximately, thereby protected battery.But too high when cell internal pressure, when battery was realized directional splitting, relief hole was too small or too much owing to covering, and causes the inside battery material to stop up at the lid place.For solving this technical problem, application number is 00231517.3 Chinese patent application, removed positive temperature coefficient resistor, and open 3 big relief holes on top cover, the deficiency that this structure exists is: blowout disk adopts indentation, when cell internal pressure increases, blowout disk can not reliably be torn at the indentation place, thereby causes the interior material of battery slewing not get rid of, and has potential safety hazard, blowout disk is umbrella-shaped structure, the buffer brake instability that it bears.
Summary of the invention
The purpose of this utility model provides a kind of battery anti-explosion lid, the technical problem that solves is when cell internal pressure increases, blowout disk is reliably torn, the buffer brake that guarantees blowout disk simultaneously is stable, second technical problem to be solved in the utility model is to improve sealing effectiveness, the 3rd technical problem to be solved in the utility model is to improve the machining accuracy of battery anti-explosion lid, guarantees its consistency.
The utility model is by the following technical solutions: a kind of battery anti-explosion lid, the open-ended of battery steel shell inwardly is provided with sealing ring along week, order embeds in the seal groove loam cake, ring and blowout disk, blowout disk has ventilative orifice plate, the annulus inward flange of described blowout disk connects the edge of middle part curved surface, and curved surface cross section radially in middle part is double camber and connects.
Top edge connects the lower limb of middle part curved surface in the annulus of the utility model blowout disk.
The contacted sealing surface of the annulus of sealing ring of the present utility model and blowout disk is provided with the leakproof annular projection.
Sealing ring sealing surface of the present utility model is provided with two leakproof annular projections.
The weld zone of the ventilative orifice plate central authorities of the utility model is provided with the welding drumbeat.
Welding drumbeat of the present utility model is 1 to 4.
The middle part of the utility model loam cake is provided with the modulability projection.
Be covered with 4 relief holes on of the present utility model.
The utility model compared with prior art, the annulus inward flange of described blowout disk connects the edge of middle part curved surface, guaranteed when cell internal pressure increases, the middle part curved surface is reliably torn along its edge, curved surface cross section radially, middle part is double camber and connects, the buffer brake of guaranteeing blowout disk is stable, throw off the pressure unanimity, the leakproof annular projection of sealing surface has improved the leakproof seal effect, the welding drumbeat that ventilative orifice plate weld zone is provided with, guarantee the consistency of welding, realized the fluctuation minimum of the explosion-proof power of this grade.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the I partial enlarged drawing of Fig. 1.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.As depicted in figs. 1 and 2, battery anti-explosion lid of the present utility model comprises battery steel shell 2, the open-ended of battery steel shell 2 inwardly is provided with sealing ring 3 along week, in the groove of sealing ring 3, along battery steel shell 2 axially from outside to inside order embed loam cake 1, ring 9 and blowout disk 8, blowout disk 8 has ventilative orifice plate 7, top edge connects the lower limb of its middle part curved surface in the annulus of blowout disk 8, guarantee when cell internal pressure increases, reliable middle part of effectively tearing blowout disk 8, curved surface cross section radially, middle part is the double camber type of attachment, stable with the buffer brake of guaranteeing blowout disk, throw off the pressure unanimity, sealing ring 3 is provided with two leakproof annular projections 4 with the contacted sealing surface of annulus of blowout disk 8,5, realize labyrinth sealing, improved its leakproof seal effect, the weld zone of ventilative orifice plate 7 central authorities is provided with 1 to 4 welding drumbeat 6, can guarantee the consistency of welding, make the explosion-proof fluctuation of this grade reach minimum, the middle part of loam cake 1 is provided with modulability projection 10, to adapt to different users to encapsulating the requirement of back Explosion-proof cap height, realize the change of final integral size by the amount of adjusting projection, and needn't require mold developing again at difference, loam cake 1 is provided with 4 big relief holes, strengthens the pressure release ability.
In the use, when cell internal pressure increased gradually, blowout disk 8 central structures were reverse, with the solder joint automatic disconnection of the welding drumbeat 6 of ventilative orifice plate 7 central authorities, cut off anodal passage; When cell internal pressure continued to increase, tore at the blowout disk middle part, and material is discharged by 4 relief hole slewings on the top cover in the battery, realizes pressure release, and battery is not blasted, and has guaranteed to use the people's of battery safety.
The utility model is simple in structure, safe and reliable, manufacturing process is simple.
Claims (8)
1. a battery anti-explosion covers, battery steel shell (2) open-ended along inwardly being provided with sealing ring (3) week, order embeds in sealing ring (3) groove loam cake (1), ring (9) and blowout disk (8), blowout disk (8) has ventilative orifice plate (7), it is characterized in that: the annulus inward flange of described blowout disk (8) connects the edge of middle part curved surface, and curved surface cross section radially in middle part is double camber and connects.
2. battery anti-explosion lid according to claim 1, it is characterized in that: top edge connects the lower limb of middle part curved surface in the annulus of described blowout disk (8).
3. battery anti-explosion lid according to claim 2 is characterized in that: described sealing ring (3) is provided with the leakproof annular projection with the contacted sealing surface of annulus of blowout disk (8).
4. battery anti-explosion lid according to claim 3, it is characterized in that: described sealing ring (3) sealing surface is provided with two leakproof annular projections (4,5).
5. battery anti-explosion lid according to claim 4 is characterized in that: the weld zone of described ventilative orifice plate (7) central authorities is provided with welding drumbeat (6).
6. battery anti-explosion lid according to claim 5, it is characterized in that: described welding drumbeat (6) is 1 to 4.
7. battery anti-explosion lid according to claim 6, it is characterized in that: the middle part of described loam cake (1) is provided with modulability projection (10).
8. battery anti-explosion lid according to claim 7, it is characterized in that: described loam cake (1) is provided with 4 relief holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200520057977.3U CN2793932Y (en) | 2005-05-13 | 2005-05-13 | Explosive-proof cover of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200520057977.3U CN2793932Y (en) | 2005-05-13 | 2005-05-13 | Explosive-proof cover of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2793932Y true CN2793932Y (en) | 2006-07-05 |
Family
ID=36821070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200520057977.3U Expired - Fee Related CN2793932Y (en) | 2005-05-13 | 2005-05-13 | Explosive-proof cover of battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2793932Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008106835A1 (en) * | 2007-03-02 | 2008-09-12 | Shenzhen Bak Battery Co., Ltd | An improved battery mouth-sealing assembly and a battery including the same |
| WO2008106836A1 (en) * | 2007-03-02 | 2008-09-12 | Shenzhen Bak Battery Co., Ltd , | Battery mouth-sealing assembly and battery including the same |
| WO2008106834A1 (en) * | 2007-03-02 | 2008-09-12 | Shenzhen Bak Battery Co., Ltd | An improved battery mouth-sealing assembly and a battery including the same |
| CN101483225A (en) * | 2008-01-11 | 2009-07-15 | 日立麦克赛尔株式会社 | Battery pack |
| CN101304079B (en) * | 2008-07-07 | 2010-06-02 | 常州剑湖金城车辆设备有限公司 | Lithium battery cap component |
| CN101931090A (en) * | 2009-06-23 | 2010-12-29 | 深圳市比克电池有限公司 | Battery combination nut cap and cylindrical battery using same |
| CN102332601A (en) * | 2010-12-21 | 2012-01-25 | 东莞新能源科技有限公司 | Cylindrical lithium ion battery |
| CN105118936A (en) * | 2015-09-06 | 2015-12-02 | 朱剑 | Gigohm-level anti-explosion and combustion-proof cover cap of power battery |
-
2005
- 2005-05-13 CN CN200520057977.3U patent/CN2793932Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008106835A1 (en) * | 2007-03-02 | 2008-09-12 | Shenzhen Bak Battery Co., Ltd | An improved battery mouth-sealing assembly and a battery including the same |
| WO2008106836A1 (en) * | 2007-03-02 | 2008-09-12 | Shenzhen Bak Battery Co., Ltd , | Battery mouth-sealing assembly and battery including the same |
| WO2008106834A1 (en) * | 2007-03-02 | 2008-09-12 | Shenzhen Bak Battery Co., Ltd | An improved battery mouth-sealing assembly and a battery including the same |
| CN101483225A (en) * | 2008-01-11 | 2009-07-15 | 日立麦克赛尔株式会社 | Battery pack |
| CN101483225B (en) * | 2008-01-11 | 2013-09-18 | 日立麦克赛尔能源株式会社 | Battery pack |
| CN101304079B (en) * | 2008-07-07 | 2010-06-02 | 常州剑湖金城车辆设备有限公司 | Lithium battery cap component |
| CN101931090A (en) * | 2009-06-23 | 2010-12-29 | 深圳市比克电池有限公司 | Battery combination nut cap and cylindrical battery using same |
| CN102332601A (en) * | 2010-12-21 | 2012-01-25 | 东莞新能源科技有限公司 | Cylindrical lithium ion battery |
| CN102332601B (en) * | 2010-12-21 | 2014-04-09 | 东莞新能源科技有限公司 | Cylindrical lithium ion battery |
| CN105118936A (en) * | 2015-09-06 | 2015-12-02 | 朱剑 | Gigohm-level anti-explosion and combustion-proof cover cap of power 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: 20060705 Termination date: 20120513 |