CN105826504B - The current blocking structure of orifice plate and lithium ion battery - Google Patents
The current blocking structure of orifice plate and lithium ion battery Download PDFInfo
- Publication number
- CN105826504B CN105826504B CN201610379218.1A CN201610379218A CN105826504B CN 105826504 B CN105826504 B CN 105826504B CN 201610379218 A CN201610379218 A CN 201610379218A CN 105826504 B CN105826504 B CN 105826504B
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- CN
- China
- Prior art keywords
- ring indentation
- orifice plate
- indentation
- current blocking
- cid
- 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.)
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Links
- 230000000903 blocking effect Effects 0.000 title claims abstract description 21
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 19
- 238000007373 indentation Methods 0.000 claims abstract description 68
- 238000004880 explosion Methods 0.000 claims abstract description 16
- 238000003754 machining Methods 0.000 abstract description 8
- 238000012545 processing Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 208000032953 Device battery issue Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
-
- 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
Abstract
The invention discloses a kind of orifice plates, are respectively arranged with upper ring indentation and lower ring indentation in the upper and lower surfaces of the orifice plate, the upper ring indentation is coaxial with lower ring indentation but diameter is different.The current blocking structure of lithium ion battery is also disclosed, including the orifice plate being fixedly connected and explosion rupture disk, is respectively formed with upper ring indentation and lower ring indentation in the upper and lower surfaces of the orifice plate, the upper ring indentation is coaxial with lower ring indentation but diameter is different.Orifice plate of the invention, by upper ring indentation and lower ring indentation overlap part interval 6 be used as CID structure, the processing is simple.By the current blocking structure on the orifice plate perpendicular to battery cover direction, that is, current blocking is realized in the drawing crack for being spaced 6.And the reduction of upper ring indentation and lower ring indentation machining tolerance dependence, it is to greatly reduce processing cost, and the stability of product, especially explosion-proof performance are stablized first.
Description
Technical field
The present invention relates to lithium ion battery preparation technical fields, more particularly to a kind of orifice plate and explosion rupture disk and lithium-ion electric
The current blocking structure of Chi Gai.
Background technique
Lithium ion battery rapidly becomes because having the series of advantages such as high working voltage, big energy density, long circulation life
The development trend of secondary cell.Currently, lithium ion battery is widely used in mobile communication apparatus and portable electronic device, and
And have broad application prospects in special dimensions such as aviation, national defence, military projects.Chargeable secondary lithium battery, which has become, to be overcome
The important renewable energy of the problems such as energy crisis, shortage of resources, environmental pollution.
However, lithium ion battery, as a kind of chemical energy storage equipment, energy storage mechanism just determines that it is inevitably deposited
In the hidden danger of secure context, therefore the safeguard measure when design scheme of raising safety and generation unexpected situation also becomes lithium
The most important thing of ion battery design.Lithium ion battery also be mainly consumer electronics product power supply epoch, just about
Battery of mobile phone, cells in notebook computer report on fire from explosion.But battery energy density is low at that time, and use scope is mainly limited to
Personal use, thus caused by destroy and other negative effects it is relatively small.However in recent years with electric car industry
Sudden emergence, capacity of lithium ion battery becomes greatly, and energy density is continuously improved, multiple when single battery is made into dozens of Ann
Gross energy becomes the design being in daily use up to tens to a few Baidu's electricity after battery composition battery pack.With the lithium powered as electric car
Ion battery gross energy is thousands of times even up to ten thousand times of consumer electronics product, once safety problem, consequence occurs
It is hardly imaginable, it rises to fight because of battery failure there are also electrocar and electric bus at present and causes relatively heavy losses
Report.
The lithium ion battery of different structure has different safety and Protections.For cylindrical lithium ion battery, electricity
Safe design in terms of pool structure includes current blocking structure (Current Interrupt Device, abbreviation CID), explosion-proof
Piece, pressure-relief valve etc..Wherein CID is protected as first layer, and reliability is even more important.The working principle of CID is: when battery goes out
When existing security risk, bulk gas can be generated in inside battery, so that inside battery air pressure increases, so that CID be allowed to disconnect, realized
Make battery breaking.Traditionally, CID is carved by the pad fracture between battery key drop and explosion rupture disk or the single layer on orifice plate
The characteristics of trace is broken to realize its function, both schemes is to implement simply, but be disadvantageous in that the former for welding precision
It is required that very high, the latter is very accurate for width of nick requirement, and slightly deviation will result in the significant change that CID disconnects pulling force, into
And influence battery security.
Summary of the invention
In view of the technical drawbacks of the prior art, it is an object of the present invention to provide a kind of orifice plate and cylindrical lithium from
The current blocking structure of sub- battery cover.
The technical solution adopted to achieve the purpose of the present invention is:
A kind of orifice plate is respectively arranged with upper ring indentation and lower ring indentation, institute in the upper and lower surfaces of the orifice plate
The upper ring indentation stated is coaxial with lower ring indentation but diameter is different.
The sum of described depth of upper ring indentation and lower ring indentation is greater than the thickness of the orifice plate.
The depth of the upper ring indentation and lower ring indentation is all larger than the half of hole plate thickness.
The diameter of the upper ring indentation is greater than the diameter of the lower ring indentation.
Including the orifice plate, the explosion rupture disk being fixedly connected with the orifice plate, the fixation of the explosion rupture disk and orifice plate
Tie point is the center of circle of upper ring indentation and lower ring indentation.
The lithium ion battery is cylindrical lithium ion battery.
Compared with prior art, the beneficial effects of the present invention are:
Orifice plate of the invention, by upper ring indentation and lower ring indentation overlap part interval 6 be used as CID structure, processing letter
It is single.By the current blocking structure on the orifice plate perpendicular to battery cover direction, that is, current blocking is realized in the drawing crack for being spaced 6.This hair
Inner pressure of battery needed for the bright CID structural break, it is smaller to the dependence of upper ring indentation and lower ring width of nick, i.e., to upper
Ring indentation and lower ring indentation machining tolerance dependence reduce, and are the cost rate substantially increased in process first, to drop
Low processing cost, while the stability of product is improved, especially explosion-proof performance is stablized.
Detailed description of the invention
Fig. 1 show the structural schematic diagram of the current blocking structure of cylindrical lithium-ion battery cap of the invention.
Fig. 2 show CID structure when being CID structure shown in FIG. 1, in the case that inner pressure of battery is certain, answers inside CID
The relational graph of power and CID height；
Fig. 3 show the CID structural schematic diagram of pad breaking type；
Fig. 4 show CID structure when being CID structure shown in Fig. 3, in the case that inner pressure of battery is certain, answers inside CID
The relational graph of power and pad area；
Fig. 5 show the CID structural schematic diagram of unilateral indentation breaking type；
Fig. 6 show CID structure when being CID structure shown in fig. 5, in the case that inner pressure of battery is certain, answers inside CID
The relational graph of power and width of nick.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that described herein
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
As shown in Figs. 1-2, the current blocking structure of column lithium ion battery of the invention, including the orifice plate being fixedly connected
5 and explosion rupture disk 2 and for by orifice plate and explosion rupture disk periphery carry out insulation positioning washer 4, in the upper surface of the orifice plate
Coaxial but different diameter upper ring indentation and lower ring indentation are respectively formed with lower surface.The orifice plate and explosion rupture disk passes through riveting
It the modes such as connects or welds to be fixedly connected.
That is, the upper ring indentation and lower ring indentation are arranged on orifice plate and the sum of depth is greater than the thickness of the orifice plate
Degree.Preferably, the depth of the upper ring indentation and lower ring indentation is all larger than the half of hole plate thickness.Wherein, the upper ring
The diameter of indentation is greater than the diameter of the lower ring indentation, and the fixed connection point of the explosion rupture disk and orifice plate is upper ring indentation
With the center of circle, that is, axle center of lower ring indentation.The interval 6 of upper ring indentation and lower ring indentation lap constitutes CID structure, and CID is tied
Structure is arranged on orifice plate, and when security risk and greatly volume production gas occurs by battery, explosion rupture disk jacks up upwards and drives orifice plate together
Mobile, the movement of orifice plate causes CID structure to be stretched fracture, realization current blocking.
Orifice plate of the invention, by upper ring indentation and lower ring indentation overlap part interval 6 be used as CID structure, processing letter
It is single.By the current blocking structure on the orifice plate perpendicular to battery cover direction, that is, current blocking is realized in the drawing crack for being spaced 6.
It is an interval 6 for enclosing between the indentation of two sides at explosion rupture disk and orifice plate junction (i.e. center location) periphery for CID,
Tolerance is fabricated from the depth of two sides indentation, that is, is spaced 6 height in Fig. 2.It is when inner pressure of battery is certain shown in Fig. 2
When, CID internal stress with CID height variation relation, it can be seen that CID stress is unobvious with height change.
Existing two kinds of technologies are taken to be used as with reference to comparing, Fig. 3 show pad breaking type CID disrupted configuration schematic diagram；
Fig. 4 show CID structure shown in Fig. 3 in the case that inner pressure of battery is certain, the pass of CID internal stress and pad area
System；CID is the center point explosion rupture disk and orifice plate pad 7, and bonding area is bigger, and CID stress is smaller, and data mean that CID is disconnected
Required inner pressure of battery is obvious to welding machining tolerance dependence.
Fig. 5 show orifice plate unilateral side indentation breaking type CID disrupted configuration schematic diagram；Fig. 6 show CID knot shown in fig. 5
Structure is in the case that inner pressure of battery is certain, the relationship of CID internal stress and width of nick；CID is explosion rupture disk and orifice plate junction
One encloses the connection bottom 8 below unilateral indentation at (i.e. center location) periphery, processing and manufacturing tolerance from unilateral indentation depth,
That is, connect the height at bottom 8.It is when one timing of inner pressure of battery shown in Fig. 6, CID internal stress is with CID height, i.e. connection bottom 8
Variation relation, it can be seen that height it is bigger, CID stress is smaller, data shown in Fig. 6 mean CID disconnect needed for inner pressure of battery
It is obvious to indentation machining tolerance dependence.At that time, the machining accuracy of width of nick was higher, it is meant that cost is higher and yield rate more
It is low.
Fig. 2 is compared with Fig. 4 and Fig. 6 as it can be seen that the variation tendency of Fig. 4 and Fig. 6 is all far longer than Fig. 2.The meaning of data shown in Fig. 2
Taste CID disconnect needed for inner pressure of battery it is smaller to indentation machining tolerance dependence.Compared with the G-bar 21.19 of Fig. 4, Fig. 2
Shown data mean change slope only has 1.92, than small 10 times of solder joint formula CID structure or more representated by Fig. 4.Break electric current
Inner pressure of battery needed for blocking-up structure is equivalent to the width of nick dependence very little of two sides indentation and breaks current blocking structure
Required inner pressure of battery, to the dependence very little of current blocking structure processing and manufacturing tolerance.Electric current compared to unilateral indentation hinders
Disconnected structure, 10 times small to the dependence of machining tolerance of the current blocking structure of two sides indentation or more.And machining tolerance dependence
It reduces, is to greatly reduce processing cost, and the stability of product, especially explosion-proof performance are stablized first.
The above is only a preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of orifice plate, which is characterized in that be respectively arranged with upper ring indentation under in the upper and lower surfaces of the orifice plate
Ring indentation, the upper ring indentation is coaxial with lower ring indentation but diameter is different；The depth of the upper ring indentation and lower ring indentation
The sum of be greater than the orifice plate thickness；The depth of the upper ring indentation and lower ring indentation is all larger than the half of hole plate thickness；
The diameter of the upper ring indentation is greater than the diameter of the lower ring indentation；Upper ring indentation and lower ring indentation overlap between part
Every as current blocking structure.
2. a kind of current blocking structure of lithium ion battery, which is characterized in that including orifice plate as described in claim 1, with institute
The fixed connection point of the explosion rupture disk that the orifice plate stated is fixedly connected, the explosion rupture disk and orifice plate is upper ring indentation and lower ring indentation
The center of circle.
3. current blocking structure as claimed in claim 2, which is characterized in that the lithium ion battery is cylindrical lithium ion
Battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610379218.1A CN105826504B (en) | 2016-05-31 | 2016-05-31 | The current blocking structure of orifice plate and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610379218.1A CN105826504B (en) | 2016-05-31 | 2016-05-31 | The current blocking structure of orifice plate and lithium ion battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105826504A CN105826504A (en) | 2016-08-03 |
| CN105826504B true CN105826504B (en) | 2019-05-14 |
Family
ID=56532677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610379218.1A Active CN105826504B (en) | 2016-05-31 | 2016-05-31 | The current blocking structure of orifice plate and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105826504B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847759A (en) * | 2009-03-27 | 2010-09-29 | 三洋电机株式会社 | Sealed cell |
| WO2012120758A1 (en) * | 2011-03-09 | 2012-09-13 | パナソニック株式会社 | Cylindrical battery |
| CN104641492A (en) * | 2012-09-28 | 2015-05-20 | 日立汽车系统株式会社 | Rectangular secondary battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102194984B1 (en) * | 2014-04-08 | 2020-12-28 | 삼성에스디아이 주식회사 | Rechargeable battery |
-
2016
- 2016-05-31 CN CN201610379218.1A patent/CN105826504B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847759A (en) * | 2009-03-27 | 2010-09-29 | 三洋电机株式会社 | Sealed cell |
| WO2012120758A1 (en) * | 2011-03-09 | 2012-09-13 | パナソニック株式会社 | Cylindrical battery |
| CN104641492A (en) * | 2012-09-28 | 2015-05-20 | 日立汽车系统株式会社 | Rectangular secondary battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105826504A (en) | 2016-08-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170405 Address after: 215163 Jiangsu province Suzhou New District kolding Road No. 78 Su Gaoxin Software Park Applicant after: LISHEN BATTERY (SUZHOU) CO.,LTD. Address before: Binhai hi tech Industrial Development Zone, Binhai New Area of Tianjin city in 300384 (outer ring) South Road No. 38 Haitai Applicant before: TIANJIN LISHEN BATTERY JOINT-STOCK Co.,Ltd. |
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| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No.88, Kunlunshan Road, science and Technology City, high tech Zone, Suzhou City, Jiangsu Province Patentee after: LISHEN BATTERY (SUZHOU) CO.,LTD. Address before: Suzhou High tech Software Park, No. 78 Keling Road, Suzhou High tech Zone, Jiangsu Province, 215163 Patentee before: LISHEN BATTERY (SUZHOU) CO.,LTD. |
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| CP03 | Change of name, title or address |