CN207852835U - A kind of battery core and battery - Google Patents
A kind of battery core and battery Download PDFInfo
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- CN207852835U CN207852835U CN201721867807.0U CN201721867807U CN207852835U CN 207852835 U CN207852835 U CN 207852835U CN 201721867807 U CN201721867807 U CN 201721867807U CN 207852835 U CN207852835 U CN 207852835U
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- material layer
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- battery core
- electrode material
- battery
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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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- 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
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Abstract
The utility model discloses a kind of battery core and battery.The battery core includes battery core body and lithium source, and the battery core body includes positive electrode material layer and negative electrode material layer, and the lithium source includes lithium electrode material layer, and the thickness of the lithium electrode material layer is 5 50 μm, the battery core body and the non-contact setting of the lithium source.Battery core in the utility model and battery, the lithium electrode material layer for being 5 50 μm using thickness is positive electrode material layer or negative electrode material layer richness lithiumation, i.e., lithium electrode material layer is electrically connected with positive electrode material layer, negative electrode material layer respectively, so that the lithium of the SEI films consumption formed on the positive electrode material layer and the negative electrode material layer is the lithium in the lithium electrode material layer, the lithium consumption of the electrode of the battery is reduced, so that the irreversible capacity in initial charge is reduced, the capacity of the battery gets a promotion.
Description
Technical field
The utility model is related to battery technology field more particularly to a kind of battery core and batteries.
Background technology
With the development of electronic product and electric vehicle, demand of the people to high capacity cell is more and more urgent.However, existing
Having technology lithium battery, not only actual capacity size is smaller than theoretical value, but also during use, and the capacity of battery can be into one
Step reduces, this is because lithium battery, during first charge-discharge, meeting is in the positive electrode material layer and the negative electrode material layer
SEI films are formed, and the formation of SEI films can consume the part lithium ion on battery electrode, so that first charge-discharge is irreversible
Capacity increases, that is, reduces the efficiency for charge-discharge of electrode material, and lithium battery is in use, SEI films are with electricity on cathode
The cycle thickness in pond constantly increases, because this can lose more lithium ions, and improve the impedance of electrode, the internal resistance of battery is made to increase
Greatly, result in capacity decline, can charge and discharge number reduce, the cycle life of battery is shorter.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of battery core and battery, to solve SEI films in lithium battery
The problem of battery capacity caused by formation is reduced.
In order to achieve the above objectives, on the one hand, the utility model uses following technical scheme：
A kind of battery core, the battery core include battery core body and lithium source, and the battery core body includes positive electrode material layer and cathode
Material layer, the lithium source include lithium electrode material layer, and the thickness of the lithium electrode material layer is 5-50 μm, the battery core body and described
The non-contact setting of lithium source.
Since the thickness of lithium electrode material layer is 5-50 μm, there is preferable flexible, lithium electrode material layer, positive electrode material layer and negative
Pole material layer can be rolled into a roll battery core together, it is of course also possible to directly use plate battery core, wherein web-like battery core can root
According to theoretical capacity, suitably increase and decrease windings, meets actual operation requirements.Preferably, the lithium electrode material layer includes lithium metal
Foil or rich lithium alloy foil.
Metallic lithium foil or rich lithium alloy foil are not interfered with not only and are led without being arranged in the conductive current collector of porous structure
Electrically, and lithium metal will not because long period of soaking in the electrolytic solution due to the generation short circuit that falls off from conductive current collector is even exploded,
It is safe.
Preferably, the rich lithium alloy foil includes Li13In3、LiZn、Li3Bi、Li3One kind in As.
The Li13In3、LiZn、Li3Bi、Li3As increases the alternative of the rich lithium alloy foil.
Preferably, the battery core further includes multiple diaphragms, between the positive electrode material layer and the negative electrode material layer and
It is both provided with the diaphragm between the battery core body and the lithium source, the surface of the lithium source is deviated from the battery core body
And/or the surface in the lithium source away from the battery core body is provided with the diaphragm.
Since the thickness of lithium electrode material layer is 5-50 μm, there is preferable flexibility, using diaphragm isolation lithium electrode material layer, just
Pole material layer and negative electrode material layer not only greatly enhance safety, but also reduce the weight of battery itself, and practicability obtains
Raising is arrived.Preferably, the positive electrode material layer includes positive electrode ontology and is attached to the positive electrode body surface
Graphene film or carbon material layer.
The graphene film or carbon material layer can increase the electric conductivity of the positive electrode material layer.Preferably, the anode
Material layer additional activity group, the active group include the edge of phenyl ring or the functional group on phenyl ring surface or graphene surface oxygen
The C=O bond of change；
Preferably, the functional group on the phenyl ring surface includes ﹥ C=O or-COOH；
Preferably, the positive electrode ontology includes LiFePO4 or ternary material.
After carbon surface oxidation, it is connected to the edge of phenyl ring or the functional group (﹥ C=O or-COOH) on phenyl ring surface or small stone
The C=O bond (=C=O) of black alkene piece surface oxidation can easily with Li ionic reactions, generation-C=O-Li or-COOLi,
The positive electrode of additional activity group increases additional lithium ion insertion, can effectively promote the energy density and electricity of lithium battery
Tankage.
In order to achieve the above objectives, on the other hand, the utility model also uses following technical scheme：
A kind of battery, including shell and above-mentioned battery core, the battery core are located in the inner cavity of the shell.
The battery core is located in the inner cavity of the shell, and the shell is preferably aluminum hull, and the aluminum hull is unlikely to deform and pierces
It is broken, meet external force resistance intensity requirement, lithium metal is contacted with air or the incidence reduction of short circuit occurs with electrode for lithium metal, is had
Effect avoids the danger such as burning, explosion.
Preferably, the battery further includes anode ear, negative electrode lug and lithium electrode ear, one side of the positive electrode material layer with it is described
Anode ear is connected, and one side of the negative electrode material layer is connected with the negative electrode lug, one side and the lithium of the lithium electrode material layer
Lug is connected.
The anode ear, negative electrode lug and lithium electrode ear can improve the safety in utilization of the battery.
Preferably, the battery further includes the protective cover of isolation material, and the protective cover coats the lithium electrode ear.
The battery is without when being electrically connected the lithium electrode material layer with the positive electrode material layer or negative electrode material layer, needing
By the lithium electrode ear and air insulation, to improve security performance.
The lithium electrode material layer that battery core in the utility model and battery are 5-50 μm using thickness be positive electrode material layer or
Negative electrode material layer richness lithiumation, that is, be electrically connected lithium electrode material layer with positive electrode material layer, negative electrode material layer respectively so that it is described just
The lithium of the SEI films consumption formed in pole material layer and the negative electrode material layer is the lithium in the lithium electrode material layer, the battery
The lithium consumption of electrode reduce so that irreversible capacity in initial charge is reduced, the capacity of the battery is carried
It rises.
Description of the drawings
By referring to the drawings to the description of the utility model embodiment, the above-mentioned and other mesh of the utility model
, feature and advantage will be apparent from.
Fig. 1 is the structural schematic diagram of battery core in specific embodiment of the present invention；
Fig. 2 is the structural schematic diagram of battery in specific embodiment of the present invention；
Fig. 3 is rich lithiumation operation chart in specific embodiment of the present invention.
In figure：
1, positive electrode material layer；
2, negative electrode material layer；
3, lithium electrode material layer；
4, diaphragm；
5, anode ear；
6, negative electrode lug；
7, lithium electrode ear；
8, shell.
Specific implementation mode
The utility model is described below based on embodiment, it should be understood by one skilled in the art that carrying herein
The attached drawing of confession is provided to the purpose of explanation, and attached drawing is not necessarily drawn to scale.
Unless the context clearly requires otherwise, "include", "comprise" otherwise throughout the specification and claims etc. are similar
Word should be construed as the meaning for including rather than exclusive or exhaustive meaning；That is, being containing for " including but not limited to "
Justice.
Referring to Fig.1 shown in-Fig. 3, the battery core in the utility model includes battery core body and lithium source, as shown in Figure 1, the electricity
Core ontology includes positive electrode material layer 1 and negative electrode material layer 2, and the lithium source includes lithium electrode material layer 3, the lithium electrode material layer 3
Thickness is 5-50 μm, 3 lighter weight of lithium electrode material layer that thickness is 5-50 μm, and practicability is good.The battery core body and the lithium
The non-contact setting in source, the lithium source can be arranged in the positive side of the battery core body, and the battery core body can also be arranged
Cathode side, it is preferable that the lithium electrode material layer 3 and the battery core body are oppositely arranged, that is, 3 He of lithium electrode material layer
Relative area between the battery core body is the area of the lithium electrode material layer 3.
In battery core in the utility model, since the thickness of lithium electrode material layer 3 is 5-50 μm, there is preferable flexible, lithium
Pole material layer 3, positive electrode material layer 1 and negative electrode material layer 2 can be rolled into a roll battery core together, it is of course also possible to directly use plate
Shape battery core, wherein web-like battery core can suitably increase and decrease windings, meet actual operation requirements according to theoretical capacity.
The lithium electrode material layer 3 includes metallic lithium foil or rich lithium alloy foil, it is preferable that the richness lithium alloy foil includes
Li13In3、LiZn、Li3Bi、Li3One kind in As, metallic lithium foil or rich lithium alloy foil are not necessarily to that the conduction in porous structure is arranged
On collector, do not interfere with electric conductivity not only, and lithium metal will not because long period of soaking in the electrolytic solution due to from conductive current collector
On fall off generation short circuit even explode, it is safe.
The battery core further includes multiple diaphragms 4, between the positive electrode material layer 1 and the negative electrode material layer 2 and described
Be both provided with the diaphragm 4 between battery core body and the lithium source, in the battery core body away from the surface of the lithium source and/or
Surface in the lithium source away from the battery core body is provided with the diaphragm 4.Since the thickness of lithium electrode material layer 3 is 5-50 μ
M, has preferable flexibility, lithium electrode material layer 3, positive electrode material layer 1 and negative electrode material layer 2 is isolated using diaphragm 4, not only greatly
Safety is enhanced, and reduces the weight of battery itself, practicability is improved.
The positive electrode material layer 1 includes positive electrode ontology and the graphene film for being attached to the positive electrode body surface
Or carbon material layer.The positive electrode material layer additional activity group, the active group include edge or the phenyl ring surface of phenyl ring
The C=O bond (=C=O) of functional group or graphene surface oxidation, the functional group on the phenyl ring surface for example can be ﹥ C=O
Or-COOH, it is preferable that the positive electrode ontology includes LiFePO4, ternary material etc., in this way, after carbon surface oxidation, connection
To the edge of phenyl ring or the functional group (﹥ C=O or-COOH) on phenyl ring surface or the C=O bond of small graphene film surface oxidation
(=C=O) can easily with Li ionic reactions, generation-C=O-Li or-COOLi, the positive electrode of additional activity group, increase
Add additional lithium ion to be embedded in, can effectively promote the energy density and battery capacity of lithium battery.
Battery in the utility model, as shown in Fig. 2, including battery core described above, the battery core is located at the shell 8
Inner cavity in, the shell 8 is aluminum hull, and the aluminum hull is unlikely to deform and punctures, and meets external force resistance intensity requirement, lithium metal with it is empty
Gas contacts or the incidence reduction of short circuit occurs with electrode for lithium metal, effectively prevents the danger such as burning, explosion.
The battery further includes anode ear 5, negative electrode lug 6 and lithium electrode ear 7, one side of the positive electrode material layer 1 with it is described just
Lug 5 be connected, one side of the negative electrode material layer 2 is connected with the negative electrode lug 6, one side of the lithium electrode material layer 3 with it is described
Lithium electrode ear 7 is connected.The 7 non-contact welding of the aluminum hull and the lithium electrode ear, plays good welded seal, effectively completely cuts off
Lithium electrode material layer 3 is contacted with air, and safety is improved.The anode ear 5, the negative electrode lug 6 and the lithium electrode ear 7 can
To be distributed in one end of the battery, the both ends of the battery core can also be distributed in.When the anode ear 5, the negative electrode lug 6 and
When the lithium electrode ear 7 is distributed in one end of the battery, the lithium electrode ear 7 is preferably placed at the anode ear 5 and the negative electrode lug 6
Between.
When battery is not necessarily to the lithium electrode material layer 3 being electrically connected with the positive electrode material layer 1 or negative electrode material layer 2,
It needs by the lithium electrode ear 7 and air insulation, to improve security performance.So the battery further includes protective cover, the protection
Cover coats the lithium electrode ear 7, and the protective cover is isolation material, at this point, the battery only has anode ear 5 and negative electrode lug 6 to be exposed to
Outside is as traditional battery application method, when needs by the lithium electrode material layer 3 and the positive electrode material layer 1 or are born
When pole material layer 2 is electrically connected, the protective cover is extractd.
Battery application method in the utility model is used for the battery containing lithium electrode material layer 3, the battery application method
Including：
Rich lithiation step：By lithiumation external circuit by the positive electrode material layer or negative electrode material layer and the lithium electrode material
The bed of material is electrically connected；
Charge step：The positive electrode material layer is electrically connected with negative electrode material layer by charging external circuit, with to described
Battery charges；
Discharge step：By discharging, the positive electrode material layer is electrically connected by external circuit with negative electrode material layer, to utilize
Battery is stated to the power supply for electrical equipment in electric discharge external circuit.
The richness lithiation step can be happened at before the battery initial charge or after the battery normal use,
The richness lithiumation is happened at before the initial charge of the battery, it is possible to reduce or eliminate SEI films and form the positive lithium consumed
Ion, the richness lithiumation are happened at after the battery normal use, can compensate positive electrode material layer 1 and the cathode material at any time
The lithium ion of the bed of material 2 slows down the capacity attenuation of the battery.
As shown in figure 3, being just rich in lithiumation：Lithiumation is just being rich in form SEI films or provide additional lithium ion for surface functional group,
Anode ear 5 and lithium electrode ear 7 are discharged, discharge voltage 2.5-0V, discharge time 0-30 minute puts at this point, anode ear 5 is used as
Electric anode, lithium electrode ear 7 is as electric discharge cathode；Cathode richness lithiumation：Cathode richness lithiumation forms SEI films, by negative electrode lug 6 and lithium electrode ear 7
It discharges, electric discharge, which for example may be used blue electric battery test system or increase load, discharges, and discharge voltage 1.5-0V is put
Electric time 0-30 minutes, at this point, negative electrode lug 6 is as electric discharge anode, lithium electrode ear 7 was as electric discharge cathode.It is worth noting that anode
Rich lithiumation and cathode richness lithiumation are to utilize additional lithium source, reduce or eliminate the consumption to the lithium on anode and cathode, due to
The difference of electrode material, use condition may be different, are just being rich in lithiumation and cathode richness lithiumation, above-mentioned discharge time and electric discharge electricity
Pressure has difference.
After the completion of rich lithiumation, the protective cover is covered on the lithium electrode ear 7, is not used temporarily, at this point, the battery can
It uses, charges and discharges according to conventional batteries.In the battery subsequently in use, can be at any time manually to the positive material
The bed of material 1 and the negative electrode material layer 2 compensate, and slow down battery capacity decaying, increase lithium battery service life.
Those skilled in the art will readily recognize that under the premise of not conflicting, above-mentioned each preferred embodiment can be free
Ground combination, superposition.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, for this field
For technical staff, the utility model can have various modifications and changes.All institutes within the spirit and principle of the utility model
Any modification, equivalent substitution, improvement and etc. of work, should be included within the scope of protection of this utility model.
Claims (11)
1. a kind of battery core, which is characterized in that the battery core includes battery core body and lithium source, and the battery core body includes positive electrode
Layer and negative electrode material layer, the lithium source include lithium electrode material layer, and the thickness of the lithium electrode material layer is 5-50 μm, the battery core sheet
Body and the non-contact setting of the lithium source.
2. battery core according to claim 1, which is characterized in that the lithium electrode material layer includes that metallic lithium foil or rich lithium close
Goldleaf.
3. battery core according to claim 2, which is characterized in that the richness lithium alloy foil includes Li13In3、LiZn、Li3Bi、
Li3One kind in As.
4. according to the battery core described in one of claim 1-3, which is characterized in that the battery core further includes multiple diaphragms, it is described just
The diaphragm, institute are both provided between pole material layer and the negative electrode material layer and between the battery core body and the lithium source
State on surface and/or the lithium source in battery core body away from the lithium source be provided with away from the surface of the battery core body it is described
Diaphragm.
5. battery core according to claim 4, which is characterized in that the positive electrode material layer includes positive electrode ontology and attachment
In the graphene film or carbon material layer of the positive electrode body surface.
6. battery core according to claim 5, which is characterized in that the positive electrode ontology includes LiFePO4 or ternary material
Material.
7. battery core according to claim 4, which is characterized in that the positive electrode material layer additional activity group, the activity
Group includes the C=O bond of the edge of phenyl ring or the functional group on phenyl ring surface or graphene surface oxidation.
8. battery core according to claim 7, which is characterized in that the functional group on the phenyl ring surface include ﹥ C=O or-
COOH。
9. a kind of battery, which is characterized in that including shell and battery core as described in one of claim 1-8, the battery core is located at
In the inner cavity of the shell.
10. battery according to claim 9, which is characterized in that the battery further includes anode ear, negative electrode lug and lithium electrode
Ear, one side of the positive electrode material layer are connected with the anode ear, and one side of the negative electrode material layer is connected with the negative electrode lug,
One side of the lithium electrode material layer is connected with the lithium electrode ear.
11. battery according to claim 10, which is characterized in that the battery further includes the protective cover of isolation material, institute
It states protective cover and coats the lithium electrode ear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721867807.0U CN207852835U (en) | 2017-12-27 | 2017-12-27 | A kind of battery core and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721867807.0U CN207852835U (en) | 2017-12-27 | 2017-12-27 | A kind of battery core and battery |
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| Publication Number | Publication Date |
|---|---|
| CN207852835U true CN207852835U (en) | 2018-09-11 |
Family
ID=63419252
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| CN201721867807.0U Active CN207852835U (en) | 2017-12-27 | 2017-12-27 | A kind of battery core and battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108155420A (en) * | 2017-12-27 | 2018-06-12 | 成都市银隆新能源有限公司 | A kind of battery core, battery and battery application method |
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2017
- 2017-12-27 CN CN201721867807.0U patent/CN207852835U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108155420A (en) * | 2017-12-27 | 2018-06-12 | 成都市银隆新能源有限公司 | A kind of battery core, battery and battery application method |
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