CN107452929A - A kind of lithium ion battery of electric automobile - Google Patents
A kind of lithium ion battery of electric automobile Download PDFInfo
- Publication number
- CN107452929A CN107452929A CN201710617920.1A CN201710617920A CN107452929A CN 107452929 A CN107452929 A CN 107452929A CN 201710617920 A CN201710617920 A CN 201710617920A CN 107452929 A CN107452929 A CN 107452929A
- Authority
- CN
- China
- Prior art keywords
- layer
- lithium ion
- ion battery
- barrier film
- electric automobile
- 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.)
- Pending
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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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention provides a kind of lithium ion battery of electric automobile, and it includes multiple battery units, and each battery unit of the multiple battery unit includes：Barrier film；Positive electrode composition, it is coated on the side of the barrier film；Negative electrode compositions, it is coated on the opposite side of the barrier film；Two colelctor electrodes, it is attached at respectively on the positive and negative electrode composition on the outside of the battery unit；Two layers of insulated enclosure layer, seals the both ends of barrier film and the positive and negative electrode composition respectively, and the both ends of the barrier film are inserted in two layers of insulated enclosure layer respectively；The barrier film includes MIcroporous polyolefin film and is coated on the two-layer ceramic stratum granulosum of the MIcroporous polyolefin film both sides, and each layer of thickness of the two-layer ceramic stratum granulosum is both ends thickness intermediate thin.
Description
Technical field
The present invention relates to batteries of electric automobile field, and in particular to a kind of lithium ion battery of electric automobile.
Background technology
Lithium ion battery due to energy density it is high, have extended cycle life, specific power is high and the superiority such as green
It can be moved so as to be used in the Electron portable such as mobile phone, video camera instrument and be applied as electrokinetic cell in pure battery, mixing
Power and energy-accumulating power station.Lithium ion battery is mainly assembled by the pole piece for scribbling both positive and negative polarity material with battery diaphragm, wherein battery
The major function of barrier film is to be isolated the positive/negative plate in battery, prevents pole piece from directly contacting generation short circuit, while in electricity
The micro channel of tortuous insertion inside the barrier film of pond be present so that the ion in battery can pass freely through in micropore.
MIcroporous polyolefin film due to excellent mechanics, chemical stability and it is relatively inexpensive the characteristics of, in lithium-ion electric
The pond early stage of development is used widely, and turns into the main flow direction of lithium ion battery separator.The septate lithium of band of prior art from
Sub- battery enters shown in Fig. 1, and it includes positive and negative lug 4, colelctor electrode 3, barrier film 2, positive electrode composition 5, cathode composition 6 and insulation
Fluid sealant 1, it includes multiple battery units, and the battery unit is made up of barrier film and positive and negative electrode composition, electric insulating sealant 1
The barrier film 2 is sealed, and both positive and negative polarity composition is mostly the jelly of solid-state, it is in heating status or long-term charge status
Under, by the joint 10 of composition and electric insulating sealant 1 can penetrate into electric insulating sealant 1, this can cause electric leakage
Occur.In addition, even if the generation having not seeped into, under heating status, composition spreads to the direction of electric insulating sealant 1,2 liang of barrier film
The current density at end is larger, influences the life-span of battery.
The content of the invention
Based on solving the above problems, the invention provides a kind of lithium ion battery of electric automobile, and it includes multiple battery lists
Member, each battery unit of the multiple battery unit include：Barrier film；Positive electrode composition, it is coated on the one of the barrier film
Side；Negative electrode compositions, it is coated on the opposite side of the barrier film；Two colelctor electrodes, it is attached at respectively on the outside of the battery unit
The positive and negative electrode composition on；Two layers of insulated enclosure layer, the both ends of barrier film and the positive and negative electrode composition are sealed respectively,
The both ends of the barrier film are inserted in two layers of insulated enclosure layer respectively；The barrier film includes MIcroporous polyolefin film and is coated on institute
The two-layer ceramic stratum granulosum of MIcroporous polyolefin film both sides is stated, each layer of thickness of the two-layer ceramic stratum granulosum is in the thickness of both ends
Between it is thin.
Wherein, each layer of thickness of the two-layer ceramic stratum granulosum changes in continuity.
Wherein, each layer of thickness of the two-layer ceramic stratum granulosum is in step variation.
Wherein, the most thick degree of each layer of the two-layer ceramic stratum granulosum is 6 microns, and most minimal thickness is 2 microns.
Wherein, the material of two layers of insulated enclosure layer is sealed colloid.
Wherein, the material of two layers of insulated enclosure layer is ceramics.
Wherein, the part that the barrier film inserts the insulated enclosure layer does not have ceramic particle layer.
Wherein, the lithium ion battery includes the 8-12 battery units.
Wherein, in addition to positive and negative electrode ear is located at the lithium ion battery both sides.
Wherein, the particulate matter of the ceramic particle layer is Al2O3、SiO2And TiO2。
The present invention utilizes the ceramic particle layer of thickness change, diaphragm current even density, good airproof performance, and can prevent just
Negative electrode compositions leak.
Brief description of the drawings
Fig. 1 is the structure chart of the lithium ion battery of prior art；
Fig. 2 is the structure chart of the lithium ion battery of first embodiment of the invention；
Fig. 3 is the structure chart of the lithium ion battery of second embodiment of the invention；
Fig. 4 is the structure chart of the lithium ion battery of third embodiment of the invention.
Embodiment
The lithium ion battery of electric automobile of the present invention, referring to Fig. 2, it includes multiple battery units, the multiple battery list
Each battery unit of member includes：Barrier film 2；Positive electrode composition 5, it is coated on the side of the barrier film 2；Negative electrode compositions
6, it is coated on the opposite side of the barrier film 2；Two colelctor electrodes 3, the positive negative electricity being attached at respectively on the outside of the battery unit
On the composition of pole；Two layers of insulated enclosure layer 1, seals the both ends of the barrier film 2 and positive and negative electrode composition 5 and 6 respectively, it is described every
The both ends of film 2 are inserted in two layers of insulated enclosure layer 1 respectively；The barrier film 2 includes MIcroporous polyolefin film and is coated on described
The two-layer ceramic stratum granulosum 21 of MIcroporous polyolefin film both sides, each layer of thickness of the two-layer ceramic stratum granulosum 21 are thick for both ends
Intermediate thin.Wherein, each layer of thickness of the two-layer ceramic stratum granulosum 21 changes in continuity, the ceramic particle layer 21
Particulate matter is Al2O3、SiO2And TiO2.The ceramic particle layer 21 is compressed on the MIcroporous polyolefin film, two layers symmetrical point
Cloth.There are two electrode ears in outermost.The most thick degree of each layer of the two-layer ceramic stratum granulosum is 6 microns, most thin and thick
Spend for 2 microns.Wherein, the material of two layers of insulated enclosure layer is sealed colloid.Wherein, the barrier film 2 inserts the insulation
The part of sealant 1 does not have ceramic particle layer 21, so effectively can prevent composition from leaking.Wherein, the lithium ion
Battery includes the 8-12 battery units.
As the deformation of Fig. 2 embodiments, referring to Fig. 3, its difference is, the material of two layers of insulated enclosure layer is ceramics
Layer 11.The ceramic layer thermal diffusivity is good, and has certain rigidity.It selects aluminium oxide ceramics or aluminium nitride ceramics.
As another implementation, described in Fig. 4, wherein, each layer of thickness of the two-layer ceramic stratum granulosum becomes in staged
Change, ceramic particle layer includes three-decker, first layer 22, the second layer 23 and third layer 24, three layers of stepped distribution.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
Among the obvious changes or variations that Shen goes out is still in protection scope of the present invention.
Claims (10)
1. a kind of lithium ion battery of electric automobile, it includes multiple battery units, each battery of the multiple battery unit
Unit includes：
Barrier film；
Positive electrode composition, it is coated on the side of the barrier film；
Negative electrode compositions, it is coated on the opposite side of the barrier film；
Two colelctor electrodes, it is attached at respectively on the positive and negative electrode composition on the outside of the battery unit；
Two layers of insulated enclosure layer, the both ends of barrier film and the positive and negative electrode composition, the both ends difference of the barrier film are sealed respectively
Insert in two layers of insulated enclosure layer；
Characterized in that, the barrier film includes MIcroporous polyolefin film and is coated on the two-layer ceramic of the MIcroporous polyolefin film both sides
Stratum granulosum, each layer of thickness of the two-layer ceramic stratum granulosum is both ends thickness intermediate thin.
2. lithium ion battery of electric automobile according to claim 1, it is characterised in that：The two-layer ceramic stratum granulosum it is every
One layer of thickness changes in continuity.
3. lithium ion battery of electric automobile according to claim 1, it is characterised in that：The two-layer ceramic stratum granulosum it is every
One layer of thickness is in step variation.
4. lithium ion battery of electric automobile according to claim 1 or 2, it is characterised in that：The two-layer ceramic stratum granulosum
Each layer it is most thick degree be 6 microns, most minimal thickness be 2 microns.
5. lithium ion battery of electric automobile according to claim 4, it is characterised in that：The material of two layers of insulated enclosure layer
Expect for sealed colloid.
6. lithium ion battery of electric automobile according to claim 4, it is characterised in that：The material of two layers of insulated enclosure layer
Expect for ceramics.
7. lithium ion battery of electric automobile according to claim 4, it is characterised in that：The barrier film insertion insulation is close
The part of sealing does not have ceramic particle layer.
8. lithium ion battery of electric automobile according to claim 1, it is characterised in that：The lithium ion battery includes 8-12
The individual battery unit.
9. lithium ion battery of electric automobile according to claim 1, it is characterised in that：Also it is located at institute including positive and negative electrode ear
State lithium ion battery both sides.
10. lithium ion battery of electric automobile according to claim 1, it is characterised in that：The particle of the ceramic particle layer
Thing is Al2O3、SiO2And TiO2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710617920.1A CN107452929A (en) | 2017-07-26 | 2017-07-26 | A kind of lithium ion battery of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710617920.1A CN107452929A (en) | 2017-07-26 | 2017-07-26 | A kind of lithium ion battery of electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107452929A true CN107452929A (en) | 2017-12-08 |
Family
ID=60489029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710617920.1A Pending CN107452929A (en) | 2017-07-26 | 2017-07-26 | A kind of lithium ion battery of electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107452929A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102511098A (en) * | 2010-01-29 | 2012-06-20 | 日产自动车株式会社 | Collector for bipolar lithium ion secondary battery |
| CN102569704A (en) * | 2010-12-21 | 2012-07-11 | 通用汽车环球科技运作有限责任公司 | Battery separators with variable porosity |
-
2017
- 2017-07-26 CN CN201710617920.1A patent/CN107452929A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102511098A (en) * | 2010-01-29 | 2012-06-20 | 日产自动车株式会社 | Collector for bipolar lithium ion secondary battery |
| CN102569704A (en) * | 2010-12-21 | 2012-07-11 | 通用汽车环球科技运作有限责任公司 | Battery separators with variable porosity |
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Application publication date: 20171208 |