CN206921926U - A kind of new type lithium ion battery - Google Patents
A kind of new type lithium ion battery Download PDFInfo
- Publication number
- CN206921926U CN206921926U CN201720804833.2U CN201720804833U CN206921926U CN 206921926 U CN206921926 U CN 206921926U CN 201720804833 U CN201720804833 U CN 201720804833U CN 206921926 U CN206921926 U CN 206921926U
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- China
- Prior art keywords
- current collector
- negative current
- battery
- lithium ion
- membrane layer
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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
Abstract
The utility model discloses a kind of new type lithium ion battery, including negative current collector, membrane layer, anode active material layer and plus plate current-collecting body.Negative current collector top is cased with stainless steel battery cap; battery cap is provided through the insulated ring at the top of negative current collector with anode collection body support frame; battery surface is also covered with containment vessel and wraps up plus plate current-collecting body, and electrolyte is provided between negative current collector and membrane layer and between membrane layer and anode active material layer.Battery charge of the present utility model is distributed more uniform.Simultaneously because the hole position of micron-scale size is in the outer layer of negative current collector, and the hole position of nano-scale size is in the internal layer of negative current collector, therefore two kinds of different size holes collectively constitute graded porous structure, lithium metal can be adsorbed and accommodated, the growth of Li dendrite when battery is charged and discharged can effectively be suppressed, so as to increase battery cycle life and security and stability.
Description
Technical field
Lithium ion battery preparing technical field is the utility model is related to, more particularly to a kind of new type lithium ion battery.
Background technology
At present, new-energy automobile has become one of great strategy new industry of China seven, and with new-energy automobile
The rapid development of research and development, lithium-ion-power cell is due to the superiority with high-energy-density and long circulating service life, progressively
As most one of electrokinetic cell of development potentiality and competitiveness.
The subject matter of limitation lithium anode collector application is the lithium dendrite growth in charging process, the life of Li dendrite
Length can puncture battery diaphragm so as to cause internal short-circuit of battery, and then it is even electric to trigger battery system thermal runaway, electrolyte to catch fire
The safety problems such as pond blast.
In addition, the growth of Li dendrite consumes active material lithium, causing the utilization rate of battery gradually reduces, while Li dendrite
Growth causes negative current collector surface mainly due to the lithium ion skewness between negative current collector and diaphragm interface
Lithium ion nonuniform deposition over time and space, form dendritic Li dendrite.With the increase of cycle-index, Li dendrite
It can drastically grow and penetrate barrier film, ultimately result in the short circuit and failure of battery.
Therefore, the lithium ion uniform deposition in charging process on negative current collector and diaphragm interface is kept to have become battery
The important directions of safety problem, and the further optimization design of lithium ion battery structure is extremely important.
Utility model content
Main purpose of the present utility model is to propose a kind of new type lithium ion battery, it is intended to improves lithium-ion-power cell
Use reliability and security.
To achieve the above object, the utility model proposes a kind of new type lithium ion battery, including be arranged inside battery
Center and be the negative current collector of graded porous structure, the negative current collector has been wrapped circumferentially around plus plate current-collecting body, the negative pole
Anode active material layer is provided between collector and the plus plate current-collecting body；The negative current collector and the positive electrode active materials
It is mutually isolated that membrane layer is provided between layer, the negative current collector top is provided with battery cap sleeve in the negative current collector top
The insulated ring of the negative current collector, electricity are provided through between at the top of end, the battery cap bottom and the plus plate current-collecting body
Pool surface is also covered with containment vessel and wraps up the plus plate current-collecting body；Between the negative current collector and the membrane layer and institute
State and electrolyte is provided between membrane layer and the anode active material layer.
Preferably, the battery cap bottom surface is provided with groove, and the battery cap bottom is inserted at the top of the negative current collector
In the groove in face, the membrane layer top is extended in the battery cap and the negative current collector top sidewall gap.
The membrane layer bottom for being preferably located at the negative current collector bottom abuts with the containment vessel inner bottom surface.
Preferably, containment vessel top edge is crimped on the battery cap peripheral edge along top, the insulated ring
Edge is upturned and extends to the containment vessel mutually crimps the medium position being connected with the battery cap, by the guarantor
It is mutually isolated between protective case and the battery cap.
Preferably, the membrane layer only turns on the ion of electrolyte.
Preferably, the electrolyte is liquid electrolyte or solid polymer electrolyte.
Preferably, the negative current collector is cylindric.
Technical solutions of the utility model are born by the negative current collector in the center of battery setting graded porous structure
Pole collector has been wrapped circumferentially around plus plate current-collecting body, and anode active material layer is provided between negative current collector and plus plate current-collecting body,
And it is mutual with anode active material layer by negative current collector that membrane layer is provided between negative current collector and anode active material layer
Isolation.In addition, in the technical program, negative current collector top is provided with battery cap sleeve in negative current collector top, battery cap
The insulated ring of negative current collector is provided through between at the top of bottom and plus plate current-collecting body, battery surface is also covered with containment vessel will just
Pole collector parcel, is provided with electrolyte between negative current collector and membrane layer and between membrane layer and anode active material layer.
In technical solutions of the utility model, the negative current collector of column is provided with substantial amounts of micron-receive in three-dimensional structure
Rice graded porous structure, so that the specific surface area of metal column negative current collector accordingly increases, so that in charging process
The average current density of battery is smaller, and distribution of charges obtains more uniform.Simultaneously because the hole position of micron-scale size is in negative pole collection
The outer layer of fluid, and the hole position of nano-scale size is in the internal layer of negative current collector, therefore the hole of two kinds of different sizes is total to
With composition graded porous structure so that negative current collector can be adsorbed and accommodated to lithium metal, can effectively suppress battery charging
With the growth of Li dendrite in discharge process, so as to increase battery cycle life and security and stability.
In addition, copper foil of the technical solutions of the utility model relative to prior art, aluminum foil current collector, there is micron even to receive
The negative current collector of the not big aperture of meter level, has very big porosity, and the total quality of battery can be made relatively lighter, can carry
The energy density of high battery.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.
Fig. 1 is the internal structure schematic diagram of the utility model new type lithium ion battery.
Drawing reference numeral explanation：
| Label | Title | Label | Title |
| 1 | Battery cap | 5 | Membrane layer |
| 2 | Containment vessel | 6 | Negative current collector |
| 3 | Plus plate current-collecting body | 7 | Insulated ring |
| 4 | Anode active material layer |
Realization, functional characteristics and the advantage of the utility model purpose will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only part of the embodiment of the present utility model, rather than all
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belong to the scope of the utility model protection.
If it is to be appreciated that related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction be only used for explain it is relative between each part under a certain particular pose (as shown in drawings)
Position relationship, motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes therewith.
If, should " first ", " the in addition, relate to the description of " first ", " second " etc. in the utility model embodiment
Two " etc. description is only used for describing purpose, and it is not intended that instruction or implying its relative importance or implicit indicating meaning
The quantity of the technical characteristic shown.Thus, " first " is defined, the feature of " second " can express or implicitly include at least one
Individual this feature.In addition, the technical scheme between each embodiment can be combined with each other, but must be with ordinary skill
Personnel can be implemented as basis, and this technical side is will be understood that when the combination appearance of technical scheme is conflicting or can not realize
The combination of case is not present, also not within the protection domain of the requires of the utility model.
The utility model proposes a kind of new type lithium ion battery.
Fig. 1, the new type lithium ion battery of the present embodiment are referred to, including is arranged inside battery center and to be classifying porous
The negative current collector 6 of structure, negative current collector 6 have been wrapped circumferentially around plus plate current-collecting body 3, negative current collector 6 and plus plate current-collecting body 3 it
Between be provided with anode active material layer 4, between negative current collector 6 and anode active material layer 4 be provided with membrane layer 5 it is mutually isolated, bear
The top of pole collector 6 is placed on the top of negative current collector 6, the bottom of battery cap 1 and the top of plus plate current-collecting body 3 provided with battery cap 1
Between be provided through the insulated ring 7 of negative current collector 6, battery surface is also covered with containment vessel 2 and wraps up plus plate current-collecting body 3, bears
Electrolyte is provided between pole collector 6 and membrane layer 5 and between membrane layer 5 and anode active material layer 4.
In the present embodiment, the bottom surface of battery cap 1 is provided with groove, and the recessed of the bottom surface of battery cap 1 is inserted at the top of negative current collector 6
In groove, and certain gap between the top-side of negative current collector 6 and groove interior sidewall surface be present, and the top of membrane layer 5 is prolonged
Extend inside above-mentioned sidewall spacers, so that membrane layer 5 is completely isolated by negative current collector 6 and anode active material layer 4.It is excellent
Selection of land, mutually abutted with the inner bottom surface of containment vessel 2 positioned at the bottom of membrane layer 5 of the bottom of negative current collector 6.
In the present embodiment, the top edge of containment vessel 2 is crimped on the peripheral edge of battery cap 1 along top, the edge of insulated ring 7 to
It is upper to tilt and extend to containment vessel 2 and mutually crimp the medium position being connected with battery cap 1, by containment vessel 2 and battery cap 1
Between it is mutually isolated.
In the present embodiment, membrane layer 5 has the characteristic for only turning on electrolyte ion.
In the present embodiment, electrolyte is liquid electrolyte or solid polymer electrolyte.
In the present embodiment, negative current collector 6 is cylindric.
In the present embodiment, cylindrical negative current collector 6 is arranged at the center of battery, the radial direction of negative current collector 6 to
It is outer to be sequentially provided with negative current collector 6, anode active material layer 4 and plus plate current-collecting body 3, and negative current collector 6 and positive-active
It is mutually isolated that membrane layer 5 is provided between material layer 4.In the present embodiment, negative current collector 6 is with micron and nanosized level
The graded porous structure metal column in other hole, the negative current collector 6 of the column of the present embodiment can be copper post and nickel post in material, excellent
Selection of land, cylindrical negative current collector 6 are with the micron even foam copper or nickel foam of the big small holes of micron.
In the present embodiment, by negative current collector 6 and the mutually isolated membrane layer 5 of anode active material layer 4 can be polyethylene,
The materials such as polypropylene, polyimides, aluminium oxide ceramics, inside battery negative current collector 6 is set mutually to divide with anode active material layer 4
Every, and enable the ion in electrolyte to pass through membrane layer 5.Liquid can be used in the electrolyte for being arranged inside battery
Electrolyte or solid polymer electrolyte, using the carrier transmitted as battery intermediate ion, the electrolyte of the present embodiment can be six
Lithium fluophosphate/vinyl carbonate, lithium hexafluoro phosphate/propylene carbonate, lithium perchlorate/diethyl carbonate, lithium perchlorate/second two
Diethylene glycol dimethyl ether, lithium hexafluoro phosphate/l, 3- dioxolanes, lithium perchlorate/polyethers, Li2S-P2S5Electrolytelike one or more.
In the present embodiment, anode includes plus plate current-collecting body 3 and anode active material layer 4.Wherein, plus plate current-collecting body 3
Can be that aluminium net, titanium net, stainless (steel) wire etc. are any, and the material of anode active material layer 4 can be sulphur, manganese dioxide, five oxygen
Change the material that two vanadium etc. do not contain elemental lithium, or the material containing elemental lithium such as LiFePO4, LiMn2O4, nickle cobalt lithium manganate.
In addition, containment vessel 2 in the present embodiment can be aluminum hull, stainless steel case etc., battery cap 1 is stainless steel substrates, battery
Cap 1 and containment vessel 2 play a part of protecting and supporting battery jointly.And it is upturned by insulated ring 7 and extends to battery
The opening position being connected is crimped between cap 1 and containment vessel 2, so as to using as the battery cap 1 of negative pole and the guarantor as positive pole
Protective case 2 is mutually isolated.
Fig. 1 is referred to, the preparation method of the chargeable cylindrical lithium ion battery of the present embodiment is as follows：
The plus plate current-collecting body 3 coated with anode active material layer 4 is placed first inside the containment vessel 2 of battery, then will
Electrolyte is injected on the internal face of anode active material layer 4；Insulated ring 7 is positioned over to the top of plus plate current-collecting body 3, then will
The column negative current collector 6 for being wound with membrane layer 5 passes through the centre bore of insulated ring 7 and inserts the center of anode active material layer 4
Opening position is entreated, then electrolyte is injected into the opening position between negative current collector 6 and membrane layer 5；Battery cap 1 is buckled in again negative
The tip position of pole collector 6, and the containment vessel 2 of battery compresses membrane layer 5 and battery cap 1, and battery cap 1 with
It is mutually isolated by insulated ring 7 between containment vessel 2.
The utility model embodiment is born by the negative current collector 6 in the center of battery setting graded porous structure
The outer side surface of pole collector 6 has been wrapped circumferentially around plus plate current-collecting body 3, negative pole collection covered with negative current collector 6, negative current collector 6
Be provided with anode active material layer 4 between fluid 6 and plus plate current-collecting body 3, and negative current collector 6 and anode active material layer 4 it
Between be provided with membrane layer 5 negative current collector 6 and anode active material layer 4 is mutually isolated.In addition, in the technical program, negative pole collection
The top of fluid 6 is provided with the apical position that battery cap 1 is placed on negative current collector 6, and battery surface is also covered with containment vessel 2 by positive pole
Collector 3 wraps up, and is provided between negative current collector 6 and membrane layer 5 and between membrane layer 5 and anode active material layer 4
Electrolyte.
In the utility model embodiment, the negative current collector 6 of column is provided with substantial amounts of micron-nanometer in three-dimensional structure
Graded porous structure, so that the specific surface area of metal column negative current collector 6 accordingly increases, so that electric in charging process
The average current density in pond is smaller, and distribution of charges obtains more uniform.Simultaneously because the hole position of micron-scale size is in negative pole currect collecting
The outer layer of body 6, and the hole position of nano-scale size is in the internal layer of negative current collector 6, therefore the hole of two kinds of different sizes is total to
With composition graded porous structure so that negative current collector 6 can be adsorbed and accommodated to lithium metal, can effectively suppress battery charging
With the growth of Li dendrite in discharge process, so as to increase battery cycle life and security and stability.
In addition, copper foil of the utility model embodiment relative to prior art, aluminum foil current collector, have micron even nanometer
The negative current collector 6 of the big aperture of rank, has very big porosity, and the total quality of battery can be made relatively lighter, can carry
The energy density of high battery.
Preferred embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model,
Every equivalent structure transformation under design of the present utility model, made using the utility model specification and accompanying drawing content, or
Directly/be used in other related technical areas indirectly and be included in scope of patent protection of the present utility model.
Claims (7)
1. a kind of new type lithium ion battery, it is characterised in that including being arranged inside battery center and being graded porous structure
Negative current collector, the negative current collector have been wrapped circumferentially around plus plate current-collecting body, the negative current collector and the plus plate current-collecting body
Between be provided with anode active material layer；Between the negative current collector and the anode active material layer be provided with membrane layer mutually every
From the negative current collector top is provided with battery cap sleeve in the negative current collector top, the battery cap bottom and institute
The insulated ring of the negative current collector is provided through between stating at the top of plus plate current-collecting body, battery surface is also covered with containment vessel by institute
State plus plate current-collecting body parcel；Between the negative current collector and the membrane layer and the membrane layer and the positive-active material
Electrolyte is provided between the bed of material.
2. new type lithium ion battery as claimed in claim 1, it is characterised in that the battery cap bottom surface is provided with groove, institute
State and inserted at the top of negative current collector in the groove of the battery cap bottom surface, the membrane layer top extends to the battery cap
In the negative current collector top sidewall gap.
3. new type lithium ion battery as claimed in claim 2, it is characterised in that positioned at described in the negative current collector bottom
Membrane layer bottom abuts with the containment vessel inner bottom surface.
4. new type lithium ion battery as claimed in claim 1, it is characterised in that containment vessel top edge is crimped on described
Along top, the edge of the insulated ring is upturned and extends to the containment vessel and the battery cap battery cap peripheral edge
The mutually connected medium position of crimping, will be mutually isolated between the containment vessel and the battery cap.
5. new type lithium ion battery as claimed in claim 1, it is characterised in that the membrane layer only turn on electrolyte from
Son.
6. new type lithium ion battery as claimed in claim 1, it is characterised in that the electrolyte is liquid electrolyte or solid-state
Polymer dielectric.
7. new type lithium ion battery as claimed in claim 1, it is characterised in that the negative current collector is cylindric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720804833.2U CN206921926U (en) | 2017-07-05 | 2017-07-05 | A kind of new type lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720804833.2U CN206921926U (en) | 2017-07-05 | 2017-07-05 | A kind of new type lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206921926U true CN206921926U (en) | 2018-01-23 |
Family
ID=61336022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720804833.2U Active CN206921926U (en) | 2017-07-05 | 2017-07-05 | A kind of new type lithium ion battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN206921926U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112771709A (en) * | 2018-10-05 | 2021-05-07 | 株式会社Lg化学 | Secondary battery |
| WO2024026620A1 (en) * | 2022-08-01 | 2024-02-08 | 宁德时代新能源科技股份有限公司 | Conducting film and preparation method therefor, electrode, current collector, secondary battery and device |
-
2017
- 2017-07-05 CN CN201720804833.2U patent/CN206921926U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112771709A (en) * | 2018-10-05 | 2021-05-07 | 株式会社Lg化学 | Secondary battery |
| US11742541B2 (en) | 2018-10-05 | 2023-08-29 | Lg Energy Solution, Ltd. | Secondary battery |
| CN112771709B (en) * | 2018-10-05 | 2023-11-14 | 株式会社Lg新能源 | secondary battery |
| WO2024026620A1 (en) * | 2022-08-01 | 2024-02-08 | 宁德时代新能源科技股份有限公司 | Conducting film and preparation method therefor, electrode, current collector, secondary battery and device |
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