CN104716281B - Slim cylindrical lithium battery anti-explosion - Google Patents
Slim cylindrical lithium battery anti-explosion Download PDFInfo
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- CN104716281B CN104716281B CN201510167468.4A CN201510167468A CN104716281B CN 104716281 B CN104716281 B CN 104716281B CN 201510167468 A CN201510167468 A CN 201510167468A CN 104716281 B CN104716281 B CN 104716281B
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- connection sheet
- burst disk
- explosion
- ring
- lithium battery
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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)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The present invention provides a kind of slim cylindrical lithium battery anti-explosion, including steel cap, inner ring, burst disk, connection sheet, cage ring and sealing ring, the inner ring is set below the steel cap, the burst disk is set below the inner ring, the burst disk edge is provided with flange that is downward and inwardly rolling, the flange wraps the edge of connection sheet, the burst disk is fixedly connected with the middle part of connection sheet, the cage ring is installed between the edge of the connection sheet and the flange, the sealing ring is set with outside steel cap, inner ring and the burst disk.Present invention improves over the structure of explosion-proof combined block; effectively reduce cap-height; add inside battery space; burst disk is wrapped up into connection sheet; and separated by cage ring therebetween; after even if laser solder joint therebetween disengages, the second short circuit of battery will not be also caused due to the movement of connection sheet, has effectively played the safety protection function of explosion-proof combined block.
Description
Technical field
The present invention relates to explosion-proof combined block field, especially a kind of slim cylindrical lithium battery anti-explosion.
Background technology
With the success of tesla's electric car, application of the lithium battery especially box hat cylindrical lithium battery on automobile can be more next
More popularize, and the principal element for restricting Development of Electric Vehicles at present is the security and endurance of lithium battery.
General cylindrical lithium battery has explosion-proof combined block, connects between its connection sheet and burst disk simply by laser solder joint
Connect, safety effect can be played when routinely using, but under the complex environments such as strenuous exercise, shock, laser solder joint
It is easy to come off, causes battery runs down；And after battery runs down, connection sheet can move in inside battery, if connection sheet touches
Box hat, new short circuit may be caused in battery, produce secondary disaster.
At present, it is external to wrap up burst disk, inner ring and top cover simultaneously using connection sheet, it is middle to be carried out absolutely by cage ring
Edge and sealing, such a structure can be good at increasing anti-seismic performance, but shortcoming is also more prominent：1st, when by hard hit,
Box hat punctures sealing ring, and burst disk, cage ring, connection sheet and inner ring can be caused all to fail, and security incident occurs；2nd, due to even
There is passage, battery is possible to leak inside and outside connection sheet, and leak path is elongated, adds battery seal difficulty in contact pin
Greatly.
The content of the invention
The technical problems to be solved by the invention are：In order to overcome the laser solder joint in lithium battery explosion-proof combined block to come off
After the problem of easily causing battery short circuit, there is provided a kind of slim cylindrical lithium battery anti-explosion, by change connection sheet with
The combination of burst disk improves stability of the explosion-proof combined block under complex environment, reduces battery drain approach, reduces
Difficulty is sealed, the increase of inside battery space, improves battery capacity.
The present invention solves its technical problem technical scheme to be taken：A kind of explosion-proof combination cover of slim cylindrical lithium battery
Cap, including steel cap, inner ring, burst disk, connection sheet, cage ring and sealing ring, the steel cap lower section sets the inner ring, described interior
The burst disk is set below ring, and the burst disk edge is provided with flange that is downward and inwardly rolling, the flange parcel
The firmly edge of connection sheet, the burst disk are fixedly connected with the middle part of connection sheet, and the edge of the connection sheet turns over described
The cage ring is installed between side, the sealing ring is set with outside steel cap, inner ring and the burst disk.
To achieve these goals, it is embodied in：
Burst disk uses turnup structure, wraps up connection sheet, and centre is separated by cage ring, avoids connecting in vibrations, extruding
Displacement between contact pin and burst disk.
In order to increase inoxidizability and conductive stability, the material of the steel cap is the carbon steel or plating nickel on surface of plating nickel on surface
304 stainless steels, middle part is provided with to the raised flattened conical of outside batteries, offered on the flattened conical conical surface some
Bleeder port, steel cap total height are less than 1.5mm, and deformation when burst disk is opened is reduced using flanging steel cap.
In order to discharge the gas of output inside battery, the material of the burst disk is fine aluminium, and bowl-shape knot is presented in burst disk
Structure, the first boss into bowl is provided with burst disk center, the plane of burst disk is provided with some impressions, when gas pressure reaches
During the leak-off pressure value of impression, impression can split, and ensure the discharge of gas.
Preferably, the material of the connection sheet is fine aluminium, connection sheet edge is ironed and center at be provided with it is upward
Second boss, offer some passages in the plane of connection sheet, connection sheet is relatively large in diameter, can be pressed in during sealing box hat it
Between, and edge can reduce the height of sealing end than intermediate thin.
Preferably, the isolation loop material is polypropylene or polybutylene terephthalate (PBT), cage ring is L in section
The hollow cylindrical of type.
In order to increase the sealing effectiveness of sealing ring, the sealing ring material is polypropylene or gathered to this dioctyl phthalate butanediol
Ester, for sealing ring in the hollow cylindrical that section is L-type, sealing ring inwall is provided with triangle card muscle, and upper base surface is provided with ladder
Shape sealed muscle.
The beneficial effects of the invention are as follows：The slim cylindrical lithium battery anti-explosion of the present invention, cap-height is by original
3.9mm be reduced to 3mm or so, inside battery spatial altitude can increase 0.9mm, and general 18650 lithium battery coiling core height
For 60mm or so, after this block, core height can increase by 1.5% or so, i.e., in the case where not changing outside batteries size, electricity
Tankage can increase by 1.5%；Present invention improves over traditional structure, burst disk is wrapped up into connection sheet, and pass through therebetween
Cage ring separates, even if after laser solder joint therebetween disengages, also will not cause the secondary of battery due to the movement of connection sheet
Short circuit, the safety protection function of explosion-proof combined block is effectively played.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the structural representation of the slim cylindrical lithium battery anti-explosion of the present invention；
Fig. 2 is the structural representation of the burst disk of the slim cylindrical lithium battery anti-explosion of the present invention；
Fig. 3 is the structural representation of the connection sheet of the slim cylindrical lithium battery anti-explosion of the present invention；
Fig. 4 is the mounting structure schematic diagram of burst disk in the present invention, connection sheet and cage ring three；
Fig. 5 is the structural representation of the sealing ring of the slim cylindrical lithium battery anti-explosion of the present invention；
Fig. 6 is the slim cylindrical lithium battery anti-explosion sealing state diagram of the present invention.
In figure：1st, steel cap, 1-1, flattened conical, 1-2, bleeder port, 2, inner ring, 3, burst disk, 3-1, flange, 3-2, first
Boss, 3-3, impression, 4, connection sheet, 4-1, second boss, 4-2, passage 5, cage ring, 6, sealing ring, 6-1 card muscle, 6-2,
Sealed muscle, 7, box hat.
Embodiment
Presently in connection with accompanying drawing, the present invention is described in detail.This figure is simplified schematic diagram, is only illustrated in a schematic way
The basic structure of the present invention, therefore it only shows the composition relevant with the present invention.
With reference to shown in figure 1, slim cylindrical lithium battery anti-explosion of the invention, including steel cap 1, inner ring 2, burst disk
3rd, connection sheet 4, cage ring 5 and sealing ring 6, the lower section of steel cap 1 set the inner ring 2, and the lower section of inner ring 2 sets described anti-
Quick-fried 3, the edge of burst disk 3 is provided with flange 3-1 that is downward and inwardly rolling, and the flange 3-1 wraps connection sheet 4
Edge, the burst disk 3 is fixedly connected with the middle part of connection sheet 4, the edge of the connection sheet 4 and the flange 3-1
Between the cage ring 5 is installed, be set with the sealing ring 6, the steel cap 1, inner ring outside the steel cap 1, inner ring 2 and burst disk 3
2nd, total height is less than 3mm after burst disk 3, connection sheet 4 and cage ring 5 five assemble.
With reference to shown in the Fig. 4 of figure 1, burst disk 3 uses turnup structure, wraps up connection sheet 4, and centre is separated by cage ring 5, kept away
Exempt from the displacement between connection sheet 4 and burst disk 3 in vibrations, extruding；It is described anti-in order to discharge the gas of output inside battery
The material of quick-fried 3 is fine aluminium, and burst disk 3 is presented bowl structure, is provided with the first boss 3-2 into bowl at the center of burst disk 3, prevents
The plane of quick-fried 3 is provided with some impression 3-3, and when gas pressure reaches impression 3-3 leak-off pressure value, impression 3-3 can split
Open, ensure the discharge of gas.
With reference to shown in figure 1, in order to increase inoxidizability and conductive stability, the material of the steel cap 1 is plating nickel on surface
304 stainless steels of carbon steel or plating nickel on surface, middle part are provided with to the raised flattened conical 1-1 of outside batteries, the flat-top circle
Some bleeder port 1-2 are offered on the cone 1-1 conical surfaces, the total height of steel cap 1 is less than 1.5mm, and burst disk is reduced using flanging steel cap 1
Deformation during unlatching.
With reference to shown in figure 1, preferably, inner ring 2 is ring-shaped P TC, when battery occurs abnormal, temperature drastically raises, PTC
Resistance value be consequently increased, so as to reduce infringement of the electric current to lithium battery.
With reference to shown in figure 3, preferably, the material of the connection sheet 4 is fine aluminium, the edge of connection sheet 4 is ironed and center
Place is provided with upward second boss 4-1, offers some passage 4-2 in the plane of connection sheet 4, the diameter of connection sheet 4 compared with
Greatly, as shown in fig. 6, can be pressed between box hat 7 during sealing, and edge can reduce the height of sealing end than intermediate thin.
With reference to shown in figure 1, preferably, the material of the cage ring 5 is polypropylene or polybutylene terephthalate (PBT), every
From circle 5 in the hollow cylindrical that section is L-type.
With reference to shown in figure 5, in order to increase the sealing effectiveness of sealing ring 6, the material of sealing ring 6 is polypropylene or gathered to this
Dioctyl phthalate butanediol ester, sealing ring 6 are provided with triangle card muscle 6-1 in the hollow cylindrical that section is L-type, the inwall of sealing ring 6,
Upper base surface is provided with trapezoidal sealed muscle 6-2, and such as Fig. 6, the outside of sealing ring 6 is tightly extruded by box hat 7, simultaneously because card muscle 6-
1 and sealed muscle 6-2 effect, also improve sealing effectiveness.
The slim cylindrical lithium battery anti-explosion of the present invention, when normal battery operation, it is ensured that low resistance consumption, big work(
The negotiability of rate；When battery occurs abnormal, battery starts aerogenesis, and air-flow is entered by the passage 4-2 of connection sheet 4
To the downside of burst disk 3, as gas increases, air pressure increase, 3 upward stress of burst disk, connection sheet 4 is to lower stress, when reaching
During short-circuit trigger value, solder joint is pulled off, and cuts off circuit, realizes power-off safeguard function；If continue aerogenesis, air pressure inside battery
Continue to raise, when reach impression 3-3 in burst disk 3 split trigger value when, impression 3-3 splits, and electric pool gas is from steel cap 1
Bleeder port 1-2 be discharged to outside battery, realize pressure release safeguard function.
Using the above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, related staff
Various changes and amendments can be carried out in without departing from the scope of the present invention completely.The technical scope of this invention is not
The content being confined on specification, it is necessary to which its technical scope is determined according to right.
Claims (6)
1. a kind of slim cylindrical lithium battery anti-explosion, including steel cap (1), inner ring (2), burst disk (3), connection sheet (4),
Cage ring (5) and sealing ring (6), it is characterised in that：The inner ring (2) is set below the steel cap (1), under the inner ring (2)
Side sets the burst disk (3), and burst disk (3) edge is provided with flange (3-1) that is downward and inwardly rolling, described to turn over
Side (3-1) wraps the edge of connection sheet (4), and the burst disk (3) is fixedly connected with the middle part of connection sheet (4), described
The cage ring (5) is installed, the steel cap (1), inner ring (2) and explosion-proof between the edge and the flange (3-1) of connection sheet (4)
Piece (3) is set with the sealing ring (6) outside.
2. slim cylindrical lithium battery anti-explosion as claimed in claim 1, it is characterised in that：In the steel cap (1)
Between position be provided with to the raised flattened conical (1-1) of outside batteries, offer and some lose heart on flattened conical (1-1) conical surface
Hole (1-2).
3. slim cylindrical lithium battery anti-explosion as claimed in claim 1, it is characterised in that：The burst disk (3) is in
Show bowl structure, the first boss (3-2) into bowl is provided with burst disk (3) center, the plane of burst disk (3) is provided with some
Impression (3-3).
4. slim cylindrical lithium battery anti-explosion as claimed in claim 1, it is characterised in that：Connection sheet (4) side
Edge is ironed and center at be provided with upward second boss (4-1), offer some passages in the plane of connection sheet (4)
(4-2)。
5. claim 1 as described in slim cylindrical lithium battery anti-explosion, it is characterised in that：The cage ring (5)
In the hollow cylindrical that section is L-type.
6. slim cylindrical lithium battery anti-explosion as claimed in claim 1, it is characterised in that：The sealing ring (6) is in
Section is the hollow cylindrical of L-type, and sealing ring (6) inwall is provided with triangle card muscle (6-1), and upper base surface is provided with trapezoidal close
Seal muscle (6-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510167468.4A CN104716281B (en) | 2015-04-09 | 2015-04-09 | Slim cylindrical lithium battery anti-explosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510167468.4A CN104716281B (en) | 2015-04-09 | 2015-04-09 | Slim cylindrical lithium battery anti-explosion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104716281A CN104716281A (en) | 2015-06-17 |
| CN104716281B true CN104716281B (en) | 2018-01-02 |
Family
ID=53415409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510167468.4A Active CN104716281B (en) | 2015-04-09 | 2015-04-09 | Slim cylindrical lithium battery anti-explosion |
Country Status (1)
| Country | Link |
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| CN (1) | CN104716281B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811013A (en) * | 2016-04-01 | 2016-07-27 | 秦皇岛市芯驰光电科技有限公司 | High-rate anti-explosion lithium battery structure and fixing method for battery cell and steel shell |
| CN106549120A (en) * | 2016-12-12 | 2017-03-29 | 苏州安靠电源有限公司 | Anode block and the battery with the block |
| CN110444701A (en) * | 2019-08-09 | 2019-11-12 | 常州武进中瑞电子科技股份有限公司 | Lithium battery anti-package combined hat |
| CN116799388B (en) * | 2023-08-16 | 2023-12-22 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201478362U (en) * | 2009-03-11 | 2010-05-19 | 夏秀明 | Combined cover cap anti-explosion device of lithium ion battery |
| CN201820810U (en) * | 2010-10-27 | 2011-05-04 | 杨学新 | Explosion-proof combined cap of high-power power battery |
| CN202332983U (en) * | 2011-11-03 | 2012-07-11 | 常州市武进中瑞电子有限公司 | Z-structured battery anti-explosion combined cap |
| CN202749425U (en) * | 2012-08-20 | 2013-02-20 | 常州市武进中瑞电子有限公司 | Anti-blocking ultrasonic welding cylindrical lithium battery anti-explosion combined cap |
| CN204497282U (en) * | 2015-04-09 | 2015-07-22 | 常州市武进中瑞电子有限公司 | Slim cylindrical lithium battery anti-explosion |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101117622B1 (en) * | 2010-05-19 | 2012-02-29 | 에스비리모티브 주식회사 | Rechargeable battery |
-
2015
- 2015-04-09 CN CN201510167468.4A patent/CN104716281B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201478362U (en) * | 2009-03-11 | 2010-05-19 | 夏秀明 | Combined cover cap anti-explosion device of lithium ion battery |
| CN201820810U (en) * | 2010-10-27 | 2011-05-04 | 杨学新 | Explosion-proof combined cap of high-power power battery |
| CN202332983U (en) * | 2011-11-03 | 2012-07-11 | 常州市武进中瑞电子有限公司 | Z-structured battery anti-explosion combined cap |
| CN202749425U (en) * | 2012-08-20 | 2013-02-20 | 常州市武进中瑞电子有限公司 | Anti-blocking ultrasonic welding cylindrical lithium battery anti-explosion combined cap |
| CN204497282U (en) * | 2015-04-09 | 2015-07-22 | 常州市武进中瑞电子有限公司 | Slim cylindrical lithium battery anti-explosion |
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| Publication number | Publication date |
|---|---|
| CN104716281A (en) | 2015-06-17 |
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Address after: 213000 11 and 11-1 Jinghu Road, Wujin national hi tech Industrial Development Zone, Changzhou, Jiangsu, China Patentee after: Changzhou Wujin Zhong Rui electronic Polytron Technologies Inc Address before: 213161 801 people's Middle Road, Hutang Town, Wujin District, Changzhou, Jiangsu. Patentee before: Changzhou Wujin Zhongrui Electronics Co.,Ltd. |
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| CP03 | Change of name, title or address |