CN205543089U - Lithium ion battery - Google Patents
Lithium ion battery Download PDFInfo
- Publication number
- CN205543089U CN205543089U CN201620067499.2U CN201620067499U CN205543089U CN 205543089 U CN205543089 U CN 205543089U CN 201620067499 U CN201620067499 U CN 201620067499U CN 205543089 U CN205543089 U CN 205543089U
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- Prior art keywords
- lithium ion
- ion battery
- battery
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- pole
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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)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model provides a lithium ion battery, including outer seal shell and hold the inside seal battery in the seal shell outside, leave the cavity between outer seal shell and the inside seal battery, the cavity intussuseption is filled with protective gas, be provided with anodal utmost point post, negative terminal, pressurizing valve door and pressure release valve on the outer seal shell, pressurizing valve door and pressure release valve with the cavity communicates with each other, the inside seal battery includes interior seal shell and holds electric core in the interior seal shell, the electricity core through anodal utmost point ear with anodal utmost point post links to each other, through negative pole utmost point ear with negative terminal links to each other, be provided with the air pocket on the interior seal shell, the air pocket with interior seal shell is inside to communicate with each other. The utility model discloses can improve battery measurement efficiency, avoid the lithium ion battery extreme condition such as burning that blast, improve the lithium ion battery security.
Description
Technical field
This utility model relates to lithium ion battery manufacturing technology field, specifically a kind of lithium ion battery.
Background technology
At present, lithium ion battery is with performances such as its high-energy-density, high security and stable circulations, in wide application in field such as electronic equipment, energy storage, military aerospaces.Along with the development of science and technology, in above-mentioned field is applied, its security performance and cycle life, while improving constantly energy density, are required more and more higher by lithium ion battery.
While improving safety, keep one of lithium ion battery long circulation life emphasis being always Study on Li-ion batteries and development.In addition to by improving anode material for lithium-ion batteries, negative material, barrier film, electrolyte inherently safe characteristic and circulation reliability and improving manufacturing process water equality method, how according to lithium ion battery electrochemical applications characteristic is scientific and reasonable, battery to be designed, be also the common direction paid close attention to.
Traditional lithium ion battery is to seal structure, and seal casinghousing includes metal alloy compositions, organic material and organic/inorganic composite material etc., thus avoids moisture, oxygen etc. on lithium ion battery security and the impact of cycle life.nullBut owing to lithium ion battery is during manufacturing，Positive and negative pole material、Barrier film、With the presence of moisture in electrolyte，Graphite negative electrodes material itself and electrolyte organic solvent also can react in charging process simultaneously，Even if lithium ion battery carrying out precharge first process，But it is as lithium ion battery constantly to recycle，Inside lithium ion cell still can produce gas，Although metal alloy compositions seal casinghousing relatively organic material and the organic/inorganic composite material seal casinghousing with certain rigidity possess opposing battery appearance deformability more by force，But no matter whether cell sealing housing distortion expands，It is different that lithium ion battery seal casinghousing applies contact pressure to lithium-ion electric core different parts due to internal pressure existence，So that lithium-ion electric core internal positive sheet、Barrier film、Negative plate buckling deformation，Between positive/negative plate and barrier film, contact surface part is separated from each other，Thus reduce lithium ion battery charge efficiency，Produce lithium metallic dendrite simultaneously，When this lithium ion battery is continuing with，Case above is constantly aggravated，After air pressure inside reaches to a certain degree，Lithium ion battery can produce the extreme cases such as blast and burning.
Simultaneously when lithium ion battery bears pressure due to seal casinghousing internal pressure more than seal casinghousing and produces leakage, a large amount of gas such as moisture in air, oxygen can instantaneous entrance lithium-ion electric core inner, with electrolyte, negative plate vigorous reaction, and then cause the extreme case such as explosive combustion.
Utility model content
The utility model proposes a kind of lithium ion battery, solve the problems such as the easy dilatancy of lithium ion battery in prior art, explosive combustion.
The technical solution of the utility model is achieved in that
A kind of lithium ion battery, including outer seal case and the interior sealed cell that is contained in outer seal case, leaves cavity, is filled with protective gas in described cavity between described outer seal case and interior sealed cell；
Being provided with Positive Poles, negative pole pole, pressurization valve and pressure relief valve on described outer seal case, described pressurization valve and pressure relief valve communicate with described cavity；
Described interior sealed cell includes interior seal casinghousing and the battery core being contained in described interior seal casinghousing；Described battery core is connected with described Positive Poles by positive pole ear, is connected with described negative pole pole by negative lug；Being provided with airbag on described interior seal casinghousing, described airbag communicates inside described interior seal casinghousing.
Further, the pressure of the protective gas in described cavity is 0.2MPa≤Pgas＜ 0.5MPa.
Further, the maximum pressure bearing value of described airbag is 0.5MPa.
Further, described protective gas is nitrogen, carbon dioxide, helium, neon, argon, Krypton or xenon.
Further, described outer seal case is metal alloy shell, polyethylene shell or polypropylene casing, is shaped as square or cylindrical.
Further, described interior seal casinghousing is aluminum plastic film housing.
Further, described positive pole ear is connected with described Positive Poles by positive pole tabletting, and described negative lug is connected with described negative pole pole by negative pole tabletting.
Further, described battery core is lamination or winding-structure.
The beneficial effects of the utility model are:
1, this utility model cavity between outer seal case and interior seal casinghousing is filled with the protective gas of certain pressure intensity, and in cavity, gas pressure intensity is more than gas pressure intensity in interior seal casinghousing；During recycling, when pole piece shrinks, when expansion and gas produce, in interior seal casinghousing, gas pressure intensity increases, when in interior seal casinghousing, gas pressure intensity is more than gas pressure intensity in cavity, the gas that circulating battery produces during using can enter in airbag reserved on interior seal casinghousing, thus keep the positive plate of battery core, barrier film, negative plate position is opposing parallel, keep contact surface close contact between positive/negative plate and barrier film in charge and discharge process, improve lithium ion battery efficiency for charge-discharge, extend battery, and reduce the formation of lithium metal dendrite, improve lithium ion battery security.
2, when the intrinsic pressure excessive generation of interior seal casinghousing is revealed; protective gas in cavity preferentially enters inside interior seal casinghousing; moisture in air, oxygen etc. can be avoided to enter, and battery core is internal and negative plate generation vigorous reaction causes the extreme cases such as lithium ion battery generation explosive combustion, improves lithium ion battery security.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the external structure schematic diagram of one embodiment of this utility model；
Fig. 2 is the structural representation of interior one embodiment of sealed cell；
Fig. 3 is the cut-away illustration of one embodiment of this utility model.
In figure:
1, pressurization valve；2, pressure relief valve；3, Positive Poles；4, negative pole pole；5, positive pole ear；6, negative lug；7, airbag；8, package edge；9, cavity；10, rivet；11, negative pole tabletting；12, outer seal case；13, interior seal casinghousing；14, battery core；15, Casing top.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
As Figure 1-3, illustrating in the present embodiment as a example by 50Ah square laminated plates structure lithium ion battery, the present embodiment includes outer seal case 12 and the interior sealed cell being contained in outer seal case 12.Outer seal case 12 material is polypropylene, it would however also be possible to employ metal alloy or polyethylene material, and thickness is 5mm, and apparent size thickness is 40mm, and width is 145mm, and height is 210mm.
Leave cavity 9 between outer seal case 12 and interior sealed cell, in cavity 9, be filled with protective gas, the pressure P of protective gasgasFor 0.3MPa, generally at 0.2MPa≤Pgas＜ 0.5MPa can.Here, protective gas is carbon dioxide, it is also possible to at least one in nitrogen, helium, neon, argon, Krypton and xenon.
Being provided with Positive Poles 3, negative pole pole 4, pressurization valve 1 and pressure relief valve 2 on outer seal case 12, pressurization valve 1 and pressure relief valve 2 communicate with cavity 9.Outer seal case 12 passes through the once-combined molding of mould with Positive Poles 3 and negative pole pole 4.In the present embodiment, outer seal case 12 has a Casing top 15, and the other parts of Casing top 15 and outer seal case 12, by adding cure under pressure after heat fusing, reach to connect sealing purpose.Positive Poles 3, negative pole pole 4, pressurization valve 1 and pressure relief valve 2 are arranged on Casing top 15.When external pressure is at more than 0.2Mpa, pressurization valve 1 starts unidirectional insufflation gas, and when the pressure of inside battery cavity 9 is at more than 0.5Mpa, pressure relief valve 2 starts pressure release aerofluxus, improves battery security.
Interior sealed cell includes interior seal casinghousing 13 and the battery core 14 being accommodated in the inner in seal casinghousing 13.Interior seal casinghousing 13 material is aluminum plastic film, and thickness is 0.15mm, and interior sealed cell dimensional thickness is 23.8mm, and width is 128mm, and height is 197mm.Package edge 8 width of interior seal casinghousing 13 both sides and bottom is 3mm, and airbag 7 is reserved at top side encapsulation edge 8, and airbag 7 is internal with interior seal casinghousing 13 to be communicated, and the maximum pressure bearing value of airbag 7 is 0.5MPa.Airbag 7 dimensions length is 30mm, and height is 20mm, and airbag 7 thickness is 23.8mm.
Battery core 14 uses positive plate, barrier film, negative plate to be laminated；Positive pole ear 5, negative lug 6 are connected by ultra-sonic welded with battery core 14, and interior seal casinghousing 13, by edge heating fusing encapsulation, carries out application of vacuum to battery core 14 is internal before encapsulation, and vacuum is-0.06MPa；Positive pole ear 5, negative lug 6 are machined with the through hole of two a diameter of 6mm, positive pole ear 5 is fastenedly connected with the Positive Poles 3 on Casing top 15 by rivet 10 and positive pole tabletting, and negative lug 6 is fastenedly connected with the negative pole pole 4 on Casing top 15 by rivet 10 and negative pole tabletting 11.
The present embodiment is during recycling, positive/negative plate shrinks, expands and have under gas production, produce gas and can enter in airbag 7 reserved on interior seal casinghousing 13, effectively keep inside lithium ion cell positive plate, barrier film, negative plate position opposing parallel, keep contact surface close contact between positive/negative plate and barrier film in charge and discharge process, thus reduce capacity of lithium ion battery decay, improve charge efficiency, extend cycle life of lithium ion battery.
When cyclic process producing gas and making interior seal casinghousing 13 intrinsic pressure ＞ 0.5MPa produce leakage, it is internal that carbon dioxide in cavity 9 preferentially enters battery core 14, moisture in air, oxygen etc. can be avoided to enter, and battery core 14 is internal and negative plate generation vigorous reaction causes the extreme cases such as lithium ion battery generation explosive combustion, simultaneously, on outer seal case 12, pressure relief valve 2 starts pressure release aerofluxus, improves lithium ion battery security.
In the present embodiment as a example by square laminated plates structure lithium ion battery, cylindrical battery, winding-structure battery in can also use this structure.
The foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (8)
1. a lithium ion battery, it is characterised in that include outer seal case and the interior sealed cell being contained in outer seal case, leave cavity between described outer seal case and interior sealed cell, be filled with protective gas in described cavity；
Being provided with Positive Poles, negative pole pole, pressurization valve and pressure relief valve on described outer seal case, described pressurization valve and pressure relief valve communicate with described cavity；
Described interior sealed cell includes interior seal casinghousing and the battery core being contained in described interior seal casinghousing；Described battery core is connected with described Positive Poles by positive pole ear, is connected with described negative pole pole by negative lug；Being provided with airbag on described interior seal casinghousing, described airbag communicates inside described interior seal casinghousing.
2. a kind of lithium ion battery as claimed in claim 1, it is characterised in that the pressure of the protective gas in described cavity is 0.2MPa≤Pgas＜ 0.5MPa.
3. a kind of lithium ion battery as claimed in claim 2, it is characterised in that the maximum pressure bearing value of described airbag is 0.5MPa.
4. a kind of lithium ion battery as claimed in claim 2, it is characterised in that described protective gas is nitrogen, carbon dioxide, helium, neon, argon, Krypton or xenon.
5. a kind of lithium ion battery as claimed in claim 1, it is characterised in that described outer seal case is metal alloy shell, polyethylene shell or polypropylene casing, is shaped as square or cylindrical.
6. a kind of lithium ion battery as claimed in claim 1, it is characterised in that described interior seal casinghousing is aluminum plastic film housing.
7. a kind of lithium ion battery as claimed in claim 1, it is characterised in that described positive pole ear is connected with described Positive Poles by positive pole tabletting, and described negative lug is connected with described negative pole pole by negative pole tabletting.
8. a kind of lithium ion battery as claimed in claim 1, it is characterised in that described battery core is lamination or winding-structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620067499.2U CN205543089U (en) | 2016-01-22 | 2016-01-22 | Lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620067499.2U CN205543089U (en) | 2016-01-22 | 2016-01-22 | Lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205543089U true CN205543089U (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620067499.2U Expired - Fee Related CN205543089U (en) | 2016-01-22 | 2016-01-22 | Lithium ion battery |
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| Country | Link |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400024A (en) * | 2017-02-07 | 2018-08-14 | 东莞东阳光科研发有限公司 | A kind of ultracapacitor with long service life |
| CN108400269A (en) * | 2018-05-14 | 2018-08-14 | 常州格力博有限公司 | Battery pack |
| CN110729498A (en) * | 2019-10-22 | 2020-01-24 | 中国矿业大学 | Sealing structure of flat plate type solid oxide fuel cell |
| CN113767515A (en) * | 2019-09-16 | 2021-12-07 | 株式会社Lg新能源 | Method of manufacturing secondary battery and secondary battery |
| IT202000025162A1 (en) | 2020-10-23 | 2022-04-23 | Eco Res | PROTECTIVE BOX FOR BATTERIES |
-
2016
- 2016-01-22 CN CN201620067499.2U patent/CN205543089U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400024A (en) * | 2017-02-07 | 2018-08-14 | 东莞东阳光科研发有限公司 | A kind of ultracapacitor with long service life |
| CN108400269A (en) * | 2018-05-14 | 2018-08-14 | 常州格力博有限公司 | Battery pack |
| CN108400269B (en) * | 2018-05-14 | 2024-01-05 | 格力博(江苏)股份有限公司 | Battery pack |
| CN113767515A (en) * | 2019-09-16 | 2021-12-07 | 株式会社Lg新能源 | Method of manufacturing secondary battery and secondary battery |
| US11876185B2 (en) | 2019-09-16 | 2024-01-16 | Lg Energy Solution, Ltd. | Method for manufacturing secondary battery and secondary battery |
| CN113767515B (en) * | 2019-09-16 | 2024-02-23 | 株式会社Lg新能源 | Method for manufacturing secondary battery and secondary battery |
| CN110729498A (en) * | 2019-10-22 | 2020-01-24 | 中国矿业大学 | Sealing structure of flat plate type solid oxide fuel cell |
| IT202000025162A1 (en) | 2020-10-23 | 2022-04-23 | Eco Res | PROTECTIVE BOX FOR BATTERIES |
| WO2022084220A1 (en) | 2020-10-23 | 2022-04-28 | Eco-Research | Protective housing for batteries |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20170607 Granted publication date: 20160831 |
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| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20170720 Granted publication date: 20160831 |
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| PD01 | Discharge of preservation of patent | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20181025 Granted publication date: 20160831 |
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| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20211025 Granted publication date: 20160831 |
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| PD01 | Discharge of preservation of patent | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20190122 |
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| CF01 | Termination of patent right due to non-payment of annual fee |