CN207529979U - A kind of lithium battery of lithium battery fire-resisting protection shell and high safety - Google Patents
A kind of lithium battery of lithium battery fire-resisting protection shell and high safety Download PDFInfo
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- CN207529979U CN207529979U CN201721489162.1U CN201721489162U CN207529979U CN 207529979 U CN207529979 U CN 207529979U CN 201721489162 U CN201721489162 U CN 201721489162U CN 207529979 U CN207529979 U CN 207529979U
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- fire
- lithium battery
- protection shell
- resisting protection
- core
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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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Abstract
The utility model is related to a kind of lithium battery fire-resisting protection shell and the lithium batteries of high safety; fire-resisting protection shell has two watchcase faces being connected with each other to be covered in the upper surface of lithium battery electric core, lower surface; the accommodating space for accommodating the lithium battery electric core is formed between two watchcase faces; the accommodating space at least has the side there are two open-like shape; the anode plate of one of side and the lithium battery electric core, negative plates are corresponding so that the two is exposed, and other in which side is vertical with an aforementioned side.Protective shell is coated in battery core in lithium battery, by fire-resisting protection shell to the cladding of battery inner core, plays buffering concussion, fire-retardant protective effect.
Description
Technical field
The present invention relates to lithium batteries.
Background technology
With the high speed development of electronic equipment, lithium ion battery as its power supply also therewith towards ultra-thin, light weight,
High-energy, the development of high circulation service life, therefore, the positive active material of high-energy density, such as cobalt acid lithium, 4.35V high at this stage
Voltage cobalt acid lithium, 4.4V high voltages cobalt acid lithium, ternary nickel cobalt manganese systems row material（LiNi0.3Co0.3Mn0.3O2、
LiNi0.5Co0.2Mn0.3O2、LiNi0.6Co0.2Mn0.2O2、LiNi0.8Co0.1Mn0.1O2）Deng and more and more thinner electric core membrane
（The thickness of PE diaphragms can accomplish 7 μm）Application on electronic product lithium ion battery is more and more extensive.But at the same time, safety
Accident is also more and more frequently, because these positive electrode active materials lithium ion batteries of class containing cobalt are in extreme use or excessively
With（Overcharge, cross put, needle thorn, extruding, heavy impact etc.）In the case of, it is anti-that decomposition production oxygen can be generated with the raising of temperature
Should, the oxygen of generation exacerbates violent thermal response, and at the same time, very thin PE diaphragms can shrink rapidly even molten at high temperature
Melt, increase short-circuit area, and the electrode chemical reaction violent with electrolyte interface can ignite inflammable electrolyte, cause combustion
Burn, explosion etc. or even causes casualties at safety accidents, such as this occur in several years the explosion accident of swing car power supply, mobile phone
Power supply pyrophoricity accident, battery warehouse pyrophoricity accident etc., not only cause fear, also to the application of lithium ion battery to society
Cloud, therefore we should turn back, while lithium ion battery energy density and electrical property is considered,
Solve the safety problem of lithium ion battery.
Invention content
The technical problem to be solved in the present invention is, provides a kind of lithium battery fire-resisting protection shell and with this protective shell
Lithium battery.
The technical solution adopted by the present invention to solve the technical problems is：A kind of lithium battery fire-resisting protection shell, it is described fire-retardant
Protective shell has two watchcase faces being connected with each other to be covered in the upper surface of lithium battery electric core, lower surface, two watchcase faces
Between form the accommodating space for accommodating the lithium battery electric core, the accommodating space at least has the side there are two open-like shape,
In a side with for lithium battery electric core anode plate, negative plates it is exposed, other in which side with aforementioned one
Side is vertical.
A kind of foregoing lithium battery fire-resisting protection shell, the fire-resisting protection shell is U-shaped, wherein with U-shaped opening side phase
Two vertical sides are open-like shape, and the anode plate, negative plates are exposed from one of both of the aforesaid side.
A kind of foregoing lithium battery fire-resisting protection shell, the material of the fire-resisting protection shell is flame-retarded resin.
A kind of foregoing lithium battery fire-resisting protection shell, the wall thickness of the fire-resisting protection shell is 1-3mm.
A kind of lithium battery of high safety, including battery core, plastic-aluminum packaging film, cladding is just like described in former one in the battery core
Fire-resisting protection shell, fire-resisting protection shell is coated with the plastic-aluminum packaging film.
Implement technical scheme of the present invention, at least with following advantageous effect：By fire-resisting protection shell to the packet of battery core
It covers, plays buffering concussion, fire-retardant protective effect.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the invention will be further described, in attached drawing：
Fig. 1 is the utility model battery core and fire-resisting protection shell assembling schematic diagram；
Fig. 2 is the utility model fire-resisting protection shell schematic diagram；
Mark is described as follows in figure：
1st, battery core；10th, anode plate；11st, negative plates；2nd, fire-resisting protection shell；20th, U-shaped opening side；21st, bottom side；22、
Top side.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
The specific embodiment of the present invention.
As shown in Figs. 1-2, a kind of lithium battery fire-resisting protection shell, the fire-resisting protection shell 2 have two tables being connected with each other
Shell surface forms between two watchcase faces to be covered in the upper surface of lithium battery electric core 1, lower surface and accommodates the lithium battery electric core
1 accommodating space, the accommodating space at least have the side there are two open-like shape, one of side and the lithium battery electric core
1 anode plate 10, negative plates 11 are corresponded to so that the two is exposed, and other in which side is vertical with an aforementioned side.
Preferably, fire-resisting protection shell 2 is U-shaped, wherein two sides perpendicular with U-shaped opening side 20（Bottom side in figure
21st, top side 22）It is open-like shape, the anode plate 10, negative plates 11 are exposed from one of both of the aforesaid side, fire-resisting protection
2 material of shell uses flame-retarded resin.
When assembling lithium battery, fire-resisting protection shell 2 is coated in battery core 1, then again in outer cladding plastic-aluminum packaging film.With U
For type fire-resisting protection shell 2, wall thickness is determined for preferably 1 ~ 3mm, three-dimensional dimension by 1 size of battery core, and package area is battery core 1
Area, the key effect of this fire-resisting protection shell 2 is to be in hot-spot when battery or battery temperature is raised to resin melting and is in
In the case of fluid, resin can integrally cover heat spot or battery, play starvation and fire-retardant effect, improve
Battery safety, and antihunt action is played at normal temperatures.The use of U-shaped fire-resisting protection shell 2 is very simple, only need to be by battery core
1 is inserted in accommodating space, but should be noted that 1 core of battery core, two pole plate directions are vertical with 20 direction of U-shaped opening side, aluminium in production process
Modeling packaging film can form air bag, and the air bag is corresponding with 20 direction of U-shaped opening side, to be cut.
Its main material of fire-resisting protection shell 2 is EVA（Ethylene-vinyl acetate copolymer）Or TPU（Thermoplastic polyurethane bullet
Property body rubber）Polymer materials is waited to be mixed at high temperature with fire retardant, softening temperature is at 70 ~ 100 DEG C, in this temperature
Under, resin is rapidly by solid state into liquid state, and additive is mainly flame-retardant additive in resin, including alkyl acid phosphate esters：Phosphoric acid
Tributyl, tri-2-ethylhexyl phosphate, tricresyl phosphate (2- chloroethyls) ester, tricresyl phosphate (2,3- bis- chloropropyl) ester, tricresyl phosphate
(2,3- dibromopropyl) ester, Pyrol99 etc.;Aryl phosphate：Tricresyl phosphate-diphenyl ester, tricresyl phosphate, phosphoric acid triphen
Ester, phosphoric acid (2- ethylhexyls)-diphenyl ester etc.；Dicyclopentadiene class：Niran acid anhydrides etc.；Aliphatic halogenated hydrocarbon, especially bromination
Object：The virtues such as methylene bromide, trichlorobromomethane, two chlorobromomethanes and octabromodiphenyl base oxide, pentabromoethyl benzene, tetrabromobisphenol A
Fragrant race's bromide and other halides；In addition, also tricresyl phosphate (dibromopropyl) ester and cyclohexane halide and its derivative, ten
Bromo biphenyl ether and its derivative and inorganic combustion inhibitor：Tellurium compound, hydroxy Al, magnesium hydroxide, borate etc..Fire-retardant addition
Agent content is 10% ~ 40%, by the way that resin is melted into fluid at high temperature, then adds in flame-retardant additive and is mixed,
Finally U-shaped fire-resisting protection shell 2 is made in cooling molding in protective shell mold, when battery rushes under full electricity into hand-manipulating of needle thorn or weight
It hits when tests, since battery damaged area partial short-circuit can be caused in test process, causes local pyrexia, on temperature is rapid
It rises, and due to the presence of flame-retarded resin, when local temperature rise is to melting point resin, the resin on surface rapidly transforms into fluid
And damaged area is attached to, play isolation air and fire-retardant effect.
This case battery core 1 by be welded with lug lead body positive/negative plate and diaphragm by winding, diaphragm PP-PE-PP
The Al of three-layer membrane, single side or dual coating 3-5 μ m thicks2O3The ceramic diaphragm of ceramic layer passes through tri- strata alkene of PP-PE-PP
The exclusive PE low temperatures heat of hydrocarbon diaphragm is closed and the hot supporting role of PP high-temperatures, plays the shutdown insulation of hot-spot region, prevents
Positive and negative anodes short circuit, and mechanical performance is strengthened by ceramic layer, diaphragm resistance during overheat is improved, plays support and insulating effect.
It is positive ultimate ratio cathode that positive/negative plate forms battery core 1, positive and negative anodes and isolation film width and position with diaphragm by winding
Expect that area is narrow and short, coated completely by cathode material area, cathode material area is narrower than diaphragm and short, is coated completely by diaphragm, positive and negative anodes
Tab welding area and Lou Bo areas are stained with insulation with terminal adhesive tape.
By fire-resisting protection shell 2 to the cladding of battery core 1, the protective effect of buffering concussion, flame-retarded resin material are played to battery core 1
The variation of the protective shell of matter form at high temperature is realized and the infiltration of injured area during needle thorn etc. is wrapped up, can not only rise
To the effect for absorbing a part of heat, positive electrode can also be inhibited to decompose and generate oxygen, and outside air is prevented to enter it
In, limit necessary condition --- the lasting supply of oxygen of burning.
By mixing flame-retardant additive in resin so that resin will not burn in itself, pass through tri- strata alkene of PP-PE-PP
The exclusive PE heat of diaphragm is closed and the hot supporting roles of PP, plays the shutdown insulation of hot-spot region, prevents the work of positive and negative anodes short circuit
With.While it gathers and processes standby lithium ion battery with high safety performance, good cycle performance can be equally realized.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the present invention can have various changes, combination and variation.All within the spirits and principles of the present invention, made
Any modification, equivalent substitution, improvement and etc. should be included within scope of the presently claimed invention.
Claims (5)
1. a kind of lithium battery fire-resisting protection shell, it is characterised in that：The fire-resisting protection shell has two watchcase faces being connected with each other
To be covered in the upper surface of lithium battery electric core, lower surface, the appearance for accommodating the lithium battery electric core is formed between two watchcase faces
Between emptying, the accommodating space at least has a side there are two open-like shape, one of side with for lithium battery electric core just
Pole pole plate, negative plates are exposed, and other in which side is vertical with an aforementioned side.
2. a kind of lithium battery fire-resisting protection shell as described in claim 1, it is characterised in that：The fire-resisting protection shell is U-shaped,
In two sides perpendicular with U-shaped opening side be open-like shape, the anode plate, negative plates from both of the aforesaid side it
One is exposed.
3. a kind of lithium battery fire-resisting protection shell as claimed in claim 2, it is characterised in that：The material of the fire-resisting protection shell is
Flame-retarded resin.
4. a kind of lithium battery fire-resisting protection shell as described in claim 1, it is characterised in that：The wall thickness of the fire-resisting protection shell is
1-3mm。
5. a kind of lithium battery of high safety, including battery core, plastic-aluminum packaging film, it is characterised in that：Cladding is just like power in the battery core
Profit requires 1-4 any one of them fire-resisting protection shells, and fire-resisting protection shell is coated with the plastic-aluminum packaging film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721489162.1U CN207529979U (en) | 2017-11-09 | 2017-11-09 | A kind of lithium battery of lithium battery fire-resisting protection shell and high safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721489162.1U CN207529979U (en) | 2017-11-09 | 2017-11-09 | A kind of lithium battery of lithium battery fire-resisting protection shell and high safety |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207529979U true CN207529979U (en) | 2018-06-22 |
Family
ID=62581602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721489162.1U Expired - Fee Related CN207529979U (en) | 2017-11-09 | 2017-11-09 | A kind of lithium battery of lithium battery fire-resisting protection shell and high safety |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207529979U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018390A (en) * | 2020-07-17 | 2020-12-01 | 清华大学 | Sandwich electrode and battery |
-
2017
- 2017-11-09 CN CN201721489162.1U patent/CN207529979U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018390A (en) * | 2020-07-17 | 2020-12-01 | 清华大学 | Sandwich electrode and battery |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180622 Termination date: 20201109 |
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| CF01 | Termination of patent right due to non-payment of annual fee |