CN106159270A - A kind of power lithium-ion battery pair conductive agent negative poles - Google Patents
A kind of power lithium-ion battery pair conductive agent negative poles Download PDFInfo
- Publication number
- CN106159270A CN106159270A CN201510133688.5A CN201510133688A CN106159270A CN 106159270 A CN106159270 A CN 106159270A CN 201510133688 A CN201510133688 A CN 201510133688A CN 106159270 A CN106159270 A CN 106159270A
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- China
- Prior art keywords
- conductive agent
- ion battery
- negative poles
- power lithium
- battery pair
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
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- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention proposes a kind of power lithium-ion battery pair conductive agent negative poles, is made up of following components in parts by weight, does not have the conductive agent of lithium storage function: 1-3；The conductive agent of tool lithium storage function: 0.5-2；Binding agent: 2-3；Thickener: 0.8-1.5；Carbon: surplus；The weight portion sum of each component is 100.The present invention is from the thoughtcast breaking traditions, and from the modification of negative electrode, uses double conductive agent system, efficiently solves low temperature charging difficulty, the fast problem of low temperature life time decay.
Description
Technical field
The present invention relates to electric automobile, oil-electric vehicle or accumulation power supply systems technology field, specifically
It is the double conductive agent negative poles of a kind of power lithium-ion battery.
Background technology
At present, electric automobile also exists the charging difficulty realistic problem fast with life time decay at low ambient temperatures,
Electric automobile how is allowed to can adapt to full climate temperature scope significant.Solve this problem, to its core
Heart parts lithium ion battery carries out performance and is improved to close important.At present, traditional resolving ideas is to improve electrode
Ion and electronic conductivity, increase electrolyte ionic conduction ability.In terms of electron conduction, graphite
The electric conductivity of negative pole is preferable, so having only to improve ionic conductivity, and the electron conduction of positive pole is relatively
Weak, then need to start with in terms of increasing electron conduction, this is traditional resolving ideas.But these aspects are simultaneously
The low temperature charging problems of solution battery not yet in effect, there is also the polarization of low temperature rechargeable battery and increases, and low temperature follows
The quick problem of ring decay.
At present, the cryogenic property improved method of electronic vehicle lithium-ion power battery is concentrated mainly on to battery
System carries out isothermal holding, optimizes the measures such as charging strategy and implements.But there is cost increases, and effect is not
The shortcoming such as substantially, only alleviates problem, and fails effective solution.These technology are main
It is that the external heat from battery system alleviates this problem, the solution of essence of still not starting with from inside battery
The method of problem.
Content of the invention
The present invention proposes a kind of power lithium-ion battery pair conductive agent negative poles, from inside battery, to negative electricity
Pole electric conductivity is optimized, the low temperature charging of the solution battery of essence and low-temperature circulating problem.
The technical scheme is that and be achieved in that:
A kind of power lithium-ion battery pair conductive agent negative poles, are made up of following components in parts by weight:
The weight portion sum of each component is 100.
Further, the described conductive agent not having lithium storage function is conductive black SP.
Further, the conductive agent of described tool lithium storage function is flaky graphite KS-6.
Further, described binding agent is SBR binding agent.
Further, described thickener is CMC thickener.
Further, the weight ratio of each component is:
SP:KS-6:SBR:CMC:C=1.5:0.5:2.5:1:94.5.
The invention have the benefit that
The present invention is from the thoughtcast breaking traditions, and from the modification of negative electrode, uses double conduction
Agent system, efficiently solves low temperature charging difficulty, the fast problem of low temperature life time decay.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the accompanying drawing of required use is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is battery low temperature charging correlation curve when-20 DEG C；
The cycle performance correlation curve of battery when Fig. 2 is 0 DEG C.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
It Chu, is fully described by, it is clear that described embodiment is only a part of embodiment of the present invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
Property work under the premise of the every other embodiment that obtained, broadly fall into the scope of protection of the invention.
Embodiment 1
Power lithium-ion battery in the present embodiment pair conductive agent negative poles, are made up of following components in parts by weight:
In the present embodiment, the conductive agent not having lithium storage function is conductive black SP；The conductive agent of tool lithium storage function
For flaky graphite KS-6；Binding agent is SBR (Styrene-butadiene rubber, butadiene-styrene rubber) bonding
Agent；Thickener is CMC (sodium carboxymethylcellulose) thickener.
I.e. SP:KS-6:SBR:CMC:C=1.5:0.5:2.5:1:94.5.
In order to the negative pole of the present embodiment is tested, with the use of positive electrode be
NCM:SP:KS6:PVDF=94:1.5:1:3.5, the material of the original negative electrode being contrasted is C:
SP:SBR:CMC=95:1.5:2.5:1, is prepared as 10Ah in the case that the preparation technology of electrode and battery is constant
Flexible-packed battery contrasts.
Fig. 1 is battery low temperature charging correlation curve when-20 DEG C, and top curve is for using the electricity of original negative material
The low temperature charging curve in pond, lower curve is for using the low temperature charging song of the battery of the negative material of the present embodiment
Line.It can be seen that the battery of the negative material of employing the present embodiment has the battery low temperature pole of significantly reduction
Change internal resistance.
The cycle performance correlation curve of battery when Fig. 2 is 0 DEG C, top curve is for using the negative pole material of the present embodiment
The cycle performance curve of the battery of material, lower curve is bent for the cycle performance using the battery of original negative material
Line.It can be seen that the battery of the negative material of employing the present embodiment circulates at low temperatures, its capacity is substantially not
Reduce, still can recover completely at normal temperatures.
The present embodiment is from the thoughtcast breaking traditions, and from the modification of negative electrode, uses double leading
Electricity agent system.The effect that SP plays in lithium ion battery more, with the primary gathering of 150-200nm
Body is distributed to around active material form branched chain conductive network, and this respect is mainly the physics reducing battery
Internal resistance, improves the effect of electronic conductivity, and the very important effect of another one is exactly the OAN value of SP
The effect being played, namely Electolyte-absorptive and the effect keeping electrolyte, namely improve ionic conduction
The effect of property.Effect in lithium ion battery for the KS-6 is more to be filled between active material formation conduction
Bridge, and improve pole piece compaction density, and improve the pliability of pole piece.Therefore SP and KS-6 lithium from
The effect played in sub-battery is complementary collaborative.
Embodiment 2
In the present embodiment, each ingredients weight parts ratio is:
SP:KS-6:SBR:CMC:C=1:1.5:2:0.8:94.7.
Embodiment 3
In the present embodiment, each ingredients weight parts ratio is:
SP:KS-6:SBR:CMC:C=3:2:3:1.5:90.5.
Embodiment 4
In the present embodiment, each ingredients weight parts ratio is:
SP:KS-6:SBR:CMC:C=2:1:2.5:1.2:93.3.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within bright spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in this
Within bright protection domain.
Claims (6)
1. power lithium-ion battery pair conductive agent negative poles, it is characterised in that by the group of following weight parts
Divide and constitute:
The weight portion sum of each component is 100.
2. a kind of power lithium-ion battery pair conductive agent negative poles as claimed in claim 1, it is characterised in that
The described conductive agent not having lithium storage function is conductive black SP.
3. a kind of power lithium-ion battery pair conductive agent negative poles as claimed in claim 2, it is characterised in that
The conductive agent of described tool lithium storage function is flaky graphite KS-6.
4. a kind of power lithium-ion battery pair conductive agent negative poles as claimed in claim 3, it is characterised in that
Described binding agent is SBR binding agent.
5. a kind of power lithium-ion battery pair conductive agent negative poles as claimed in claim 4, it is characterised in that
Described thickener is CMC thickener.
6. a kind of power lithium-ion battery pair conductive agent negative poles as claimed in claim 5, it is characterised in that
The weight ratio of each component is:
SP:KS-6:SBR:CMC:C=1.5:0.5:2.5:1:94.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510133688.5A CN106159270A (en) | 2015-03-25 | 2015-03-25 | A kind of power lithium-ion battery pair conductive agent negative poles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510133688.5A CN106159270A (en) | 2015-03-25 | 2015-03-25 | A kind of power lithium-ion battery pair conductive agent negative poles |
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| CN106159270A true CN106159270A (en) | 2016-11-23 |
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| CN201510133688.5A Pending CN106159270A (en) | 2015-03-25 | 2015-03-25 | A kind of power lithium-ion battery pair conductive agent negative poles |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113380983A (en) * | 2021-04-07 | 2021-09-10 | 万向一二三股份公司 | High-compaction negative pole piece, preparation method thereof and lithium ion battery comprising pole piece |
| CN114551776A (en) * | 2021-07-15 | 2022-05-27 | 万向一二三股份公司 | High-compaction negative pole piece and treatment method for preventing pole piece from being stuck to roller in preparation process |
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| CN114551776A (en) * | 2021-07-15 | 2022-05-27 | 万向一二三股份公司 | High-compaction negative pole piece and treatment method for preventing pole piece from being stuck to roller in preparation process |
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Application publication date: 20161123 |
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