CN207602688U - A kind of collector, lithium battery electric core and lithium battery - Google Patents
A kind of collector, lithium battery electric core and lithium battery Download PDFInfo
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- CN207602688U CN207602688U CN201721776315.0U CN201721776315U CN207602688U CN 207602688 U CN207602688 U CN 207602688U CN 201721776315 U CN201721776315 U CN 201721776315U CN 207602688 U CN207602688 U CN 207602688U
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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 is related to a kind of field of lithium more particularly to collector, lithium battery electric core and lithium battery, the collector includes collector ontology and the conductive contact and/or gate electrode that are uniformly arranged on face of the collector far from electrolyte；The lithium battery electric core includes, and stacks gradually negative current collector, negative electrode layer, electrolyte layer, anode layer and the plus plate current-collecting body of setting, and the negative current collector and plus plate current-collecting body are above-mentioned collector；The lithium battery includes one or more above-mentioned lithium battery electric cores.The collector has current distribution and uniform heat distribution, with a low current density effective；The lithium battery electric core and lithium battery have the advantages that operating voltage height and efficiency for charge-discharge are high.
Description
【Technical field】
The utility model is related to a kind of field of lithium more particularly to collector, lithium battery electric core and lithium batteries.
【Background technology】
Current lithium battery electric core and lithium battery are drawn using aluminium, copper as current collector material, and by lug, are realized multiple
Battery unit parallel connection and it is external.For traditional small area lithium battery, due to its battery capacity density is relatively low, charging/discharging voltage compared with
It is small, therefore the current density on its electrode current collecting body surface is relatively low, will not generate larger heat, as long as ensureing do not occur larger electric current
Short circuit larger heat would not occurs and be unevenly distributed, therefore not need to do collector the optimization of electric current collection in itself.
It, should since the materials such as high-voltage positive electrode or all solid state electrolyte can be used in it for large area solid lithium battery
Have the technical need of fast charging and discharging, it, will necessarily be by if being realized in a manner that traditional only a small amount of lug is drawn
Electric field space is unevenly distributed in electrode structure, causes current distribution is uneven in collector even, causes part in battery material
Heat distribution is uneven, if battery material heat-conductive characteristic matching it is bad, it may appear that local temperature is excessively high, cause material expand,
Breakage in addition cause material melts, spontaneous combustion even explode.
Basic Component units are generally connected with each other with parallel way in lithium battery, each basic structure of lithium battery electric core in lithium battery
Parallel operation electric current into unit passes through positive and negative electrode collection ear inflow/outflow.Above-mentioned connection method is relatively low there are operating voltage, is
Raising charge or discharge power generally requires to improve operating current, the cell degradation attenuation process caused by surge
Accelerate.In addition, electric current is distributed by the smaller lug of area to entire collector, it is easy to generate non-uniform current distribution
With non-uniform heat distribution, this causes the working condition of each section battery material in a plane different, under battery overall performance
Drop, and then influence battery.If external electric equipment needs high voltage drive, need through additional translation circuit liter
Pressure increases the complexity of power-supply management system.
【Utility model content】
To overcome current collection liquid surface current distribution and heat distribution uneven, lithium battery electric core and lithium battery work at present
The low problem low with efficiency for charge-discharge of voltage, the utility model provide collector, lithium battery electric core and lithium battery.
It is as follows that the utility model provides a technical solution to solve above-mentioned technical problem：A kind of collector, for collecting lithium
Electric current in battery battery core or battery, the collector include collector ontology and are uniformly arranged on the collector far from electrolyte
Face on conductive contact and/or gate electrode.
Preferably, the conductive contact shape can be one or more of round, square and irregular polygon.
Preferably, the conductive contact is uniformly and symmetrically distributed on surface of the collector far from electrolyte, so that afflux body surface
The sum of the distance of face every bit to closest conductive contact is minimum.
Preferably, the conductive contact includes the conductions such as hard contacts and S i or C such as Cu, Ni, Au, Ag, S n or Al
One or more of nonmetallic, the conductive contact can pass through one in ultrasonic welding, laser welding, coating or vacuum deposition
Kind or combination are formed in surface of the collector far from electrolyte.
Preferably, the conductive contact can be formed in the collection by one kind in ultrasonic welding or laser welding or combination
Surface of the fluid far from electrolyte.
Preferably, the gate electrode includes the grid line that is uniformly arranged, the shape of the gate electrode include square, it is round,
One or more in symmetric polygonal or radial type, the gate electrode can be formed in the afflux by coating or silk-screen printing
Surface of the body far from electrolyte.
Preferably, the collector maximum local current densities are less than 30mA/m2。
Preferably, the conductive contact be uniformly distributed on grid intersection or grid center on.
It is as follows that the utility model provides a technical solution to solve above-mentioned technical problem：A kind of lithium battery electric core, including
Collector as described above.
It is as follows that the utility model provides a technical solution to solve above-mentioned technical problem：A kind of lithium battery, including one or
Multiple lithium battery electric cores as described above.
Compared with prior art, lithium battery electric core provided by the utility model, lithium battery and preparation method thereof have such as
Under advantageous effect：
Collector provided by the utility model by setting conductive contact and/or gate electrode on collection liquid surface, increases
Electric current collection area on big collector；Further, by the way that conductive contact and/or gate electrode is uniform in collection liquid surface
Setting, is uniformly distributed current density on collector, also improves the collection efficiency of electric current；Further, it is external by optimizing
Quantity, shape, distribution form, the distribution density of solder joint so that collection liquid surface every bit to the sum of the distance of closest endpoint
Minimum further makes current density be uniformly distributed in plane collector, and then is less than maximum local surface current density
30mA/m2。
Further, it is designed by optimizing gate electrode figureization, makes balanced current distribution on collection liquid surface, and then make most
Big part surface current density is less than 30mA/m2.Further, conjunction is mutually matched by solder joint and gate electrode, makes collector
Balanced current distribution on surface, and then make the impedance of current density sum aggregate body of fluid minimum.And then make collection liquid surface heat distribution
Uniformly, it and then realizes lithium battery electric core collector and keeps low current density and heat distribution uniform under high voltages, slow down significantly
The attenuation of lithium battery electric core caused by surge, extends the service life of lithium battery electric core, provides large area all solid lithium
The safety of battery.
The described lithium battery electric core provided of the utility model, it is closely knit successively between each layer to stack setting, and lithium battery electric core
Thickness is thin, area is big, and then makes single lithium battery electric core capacity up to more than 2000Wh；And by practical the utility model
The collector of offer, and then can make to make current distribution in afflux dignity uniform in large area lithium battery electric core, and then realize lithium
Battery battery core collector keeps 30mA/m under high voltages2Low current density and heat distribution it is uniform, slow down surge significantly
The attenuation of caused lithium battery electric core, extends the service life of lithium battery electric core, and lithium battery electric core is also made to can reach more than 10C and is filled
Electric discharge.
The lithium battery of offer described in the utility model, by using collector provided by the utility model, and will be multiple
Lithium battery electric core carries out stacking setting, and shares a positive and negative copolar collector between every two adjacent lithium battery electric cores, into
And realize that multiple stackings are connected in series with, but lithium battery reaches more than the output voltage of 1500V；Meanwhile each lithium battery electric core
In closely knit stacking is connected in series between closely knit stacking and each lithium battery electric core between each layer, make lithium battery that can realize 1200Wh/
The energy density of more than kg, single lithium battery electric core capacity is up to more than 2000Wh.
Further, by being uniformly arranged conductive contact and/grid line in the collector to lithium battery or substrate, and then can make
Make current distribution in afflux dignity uniform in large area lithium battery, and then realize lithium battery collector and keep low under high voltages
Current density and heat distribution are uniform, cell decay caused by slowing down surge significantly, extend the service life of lithium battery electric core,
The difficulty of power management is greatly reduced, meanwhile, also achieve lithium battery 10C more than charge and discharge.
【Description of the drawings】
Fig. 1 is that the utility model first is collector schematic front view in embodiment.
Fig. 2 is the utility model collector and external terminal cooperation schematic diagram.
Fig. 3 A are collector schematic front view in the utility model second embodiment.
Fig. 3 B are that collector one deforms schematic diagram in the utility model Fig. 3 A
Fig. 4 A are collector schematic front view in the utility model 3rd embodiment.
Fig. 4 B are that collector one deforms schematic diagram in the utility model Fig. 4 A.
Fig. 4 C are another deformation schematic diagrames of collector in the utility model Fig. 4 A.
Fig. 5 A are collector schematic front view in the utility model fourth embodiment.
Fig. 5 B, Fig. 5 C, Fig. 5 D, Fig. 5 E, Fig. 5 F, it is that collector deforms schematic diagram in the utility model Fig. 5 A to Fig. 5 G.
Fig. 6 A be in the utility model sixth embodiment electric core structure of lithium battery schematic diagram and lithium battery electric core with it is external
Endpoint cooperation schematic diagram.
Fig. 6 B are that electric lithium battery electric core one deforms schematic diagram in the utility model.
Fig. 7 A are lithium battery structure schematic diagrames in the 7th embodiment of the utility model.
Fig. 7 B are lithium cell encapsulation construction schematic diagrames in the utility model.
Fig. 7 C, Fig. 7 E, Fig. 7 F and Fig. 7 G are that lithium battery electric core deforms schematic diagram in Fig. 7 A.
Fig. 7 C are A portions enlarged diagrams in Fig. 7 D.
Fig. 7 H are B portions enlarged diagrams in Fig. 7 G.
Fig. 8 is lithium battery structure schematic diagram in the 8th embodiment of the utility model.
Fig. 9 is lithium battery structure schematic diagram in the 9th embodiment of the utility model.
【Specific embodiment】
In order to make the purpose of this utility model, technical solution and advantage are more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only used to solve
The utility model is released, is not used to limit the utility model.
It please refers to Fig.1 and in the first embodiment of Fig. 2 the utility model, provides a kind of collector 100, the collector
100 are used for by collecting and conducting electric current, and the collector 100 can be any or more in Cu, Ni, Au, Ag, Al, Si or C
Kind；Further, the collector 100 is preferably the alloy of one or more of Cu or Cu and Ni, Au, Ag, Al, Si or C.
It mainly includes collector ontology 1001 and is set to the conductive contact 1002 of 101 one side of collector ontology and gate electrode 1003.
The conductive contact 1002 and gate electrode 1003 are uniformly distributed on the collector 100.The conductive contact 1002 or grid electricity
Pole 1003 is electrically connected external terminal 300 by conducting wire 200.
The preparation of the physical gas-phase depositions such as sputtering, evaporation can be used in the collector 100, also can be a prefabricated collector
100.Its thickness D1 can be 200nm-10 μm；Further, the thickness D1 of the collector 100 can also be 3 μm -10 μm；Specifically
Ground, the thickness D1 of the collector 100 can be 200nm, 500nm, 1 μm, 3 μm, 5 μm, 8 μm or 10 μm.
The conductive contact 1002 mainly includes any one or more in Cu, Ni, Au, Ag, Al, Sn, Si or C.It is described to lead
Electric contact 1002 can be one or more of round, square and irregular polygon.The conductive contact can pass through
One kind or combination in ultrasonic welding, laser welding, coating or vacuum deposition are formed in the collector ontology far from electrolyte
Surface.
The gate electrode 1003 is mainly made of the grid line 1004 being uniformly and symmetrically distributed, and the gate electrode 1003 mainly includes
It is any one or more in Cu, Ni, Au, Ag, Al, Si or C.The grid line 1004 is made up of variously-shaped various arrangement forms
Gate electrode 1003.The shape of the gate electrode 1003 include square, round, symmetric polygonal or one kind in radial type or
It is a variety of.The gate electrode 1003 can be formed in the table of the collector ontology 1001 far from electrolyte by coating or silk-screen printing
Face.
Maximum local current densities are less than or equal to 10-30mA/m on the collector 1002；Further, the afflux
Maximum local current densities are less than or equal to 15-25mA/m on body 1002；Specifically, maximum part electricity on the collector 100
Current density is less than or equal to 10mA/m2、15mA/m2、20mA/m2、25mA/m2Or 30mA/m2。
It please refers to Fig. 3 A, in the second embodiment of the utility model, a collector 100 is provided, with above-described embodiment
Middle difference is that the collector 100 includes collector ontology 1001 and gate electrode 1003,1003 gridding of gate electrode point
It is distributed in the surface of the collector 100.The gate electrode 1003 further comprises main gate line 1004 and auxiliary grid line 1006.The master
Place is stated collector ontology 1001 and is divided into several current collection regions 1005 by grid line 1004.The auxiliary grid line 1006 can further be set
It is placed in the current collection region 1005, and connects the main gate line 1004.
In one specific embodiment of the utility model second embodiment, per 1dm2It is uniformly distributed on collector ontology 1001
There is (5-20) main gate line 1004；Further, per 1dm2(6-16) main gate line is evenly distributed on collector ontology 1001
1004；Specifically, per 1dm25,6,8,9,10,12,15,16 or 20 main gate lines are evenly distributed on collector ontology 1001
1004。
In another specific embodiment of the utility model second embodiment, the collector 100 is positive square, and every
1dm2Set gate electrode 1003 includes 16 main gate lines 1004 on collector ontology 1001, and the main gate line 1004 is in afflux
Horizontal and perpendicular each setting 8 on body ontology 1001, and equidistant vertical is arranged, and then collector ontology 1001 is divided into 99 collection
Electric region 1005.
Please refer to Fig. 3 B, in another specific embodiment of the utility model second embodiment, the collector 100 is circle
Shape, the gate electrode 1003 include two along 1001 diametric main gate line 1004 of collector ontology and with collector sheet
Body 1001 is the round main gate line 1004 of concentric circles distribution, and the circle main gate line 1004 sets spacing from collector ontology 1001
The center of circle is successively decreased successively to 1001 edge of collector ontology, to ensure to divide the current collection region 1005 of formation between the grid line 1004
Area equation.
Please refer to Fig. 4 A, in the 3rd embodiment of the utility model, provide a collector 100, with it is above-mentioned be to implement
Difference in example is, is with difference in above-described embodiment, and the collector 100 includes collector ontology 1001 and leads
Electric contact 1002,1002 matrix of conductive contact arrangement is on the collector ontology 1001, and then making collector sheet
Each point is minimum to the total distance on closest conductive contact 1002 on body 1001.It is appreciated that the electric current road at this time
The sum of journey minimum, and then reduce the all-in resistance of power collector 100.
One applies in a specific embodiment of example on the utility model, and the conductive contact 1002 is in collector ontology 1001
On distribution density for (0.25-15) it is a/cm2；Further, point of the conductive contact 1002 on collector ontology 1001
Cloth density for (1-10) it is a/cm2；Specifically, institute's 1002 distribution density on collector ontology 1001 of conductive contact is 0.25
A/cm2, 0.5/cm2, 1/cm2, 2/cm2, 3/cm2, 4/cm2, 8/cm2, 10/cm2, 15/cm2, 18/
cm2Or 20/cm2.Distribution density on collector ontology described in the present embodiment 1001 is 18/cm2。
Please continue to refer to Fig. 4 A, in another specific embodiment of the utility model 3rd embodiment, the conductive contact
1002 include forming rectangular conductive contact by ultrasonic soldering method, and the size of the rectangular conductive contact is 0.4-2.0mm2；Into
One step, the size of the conductive welding spots 4002 can also be 1.0-1.7mm2；Specifically, the size of the conductive welding spots 4002
Including 0.4.0mm2、0.7mm2、1.0mm2、1.1mm2、1.3mm2、1.6mm2、1.7mm2Or 2.0mm2, the rectangular conductive contact
1002 equidistantly arrangements, rectangular 1002 branch's spacing of conductive contact are not less than 0.6mm.Institute in further the present embodiment
It states rectangular conductive contact 1002 and is preferably dimensioned to be 1.3mm2, distribution spacing is 5mm.
Please refer to Fig. 4 B, in another specific embodiment of the utility model 3rd embodiment, the conductive contact 1002
Including forming circular conductive contact 1002, a diameter of 0.7- of the circular conductive contact 1002 by laser soldering method
1.1mm2；Further, the size of the conductive welding spots 4002 can also be 0.8-1.0mm2；Specifically, the circular conductive weldering
The size of point 4002 includes 0.7mm2、0.8mm2、0.9mm2、1.0mm2Or 1.1mm2, the circular conductive contact 1002 is equidistantly
Arrangement, 1002 branch's spacing of circular conductive contact are not less than 0.5mm.Circular conductive described in further the present embodiment
Contact 1002 is preferably dimensioned to be 1.0mm2, distribution spacing is 5mm.
Please refer to Fig. 4 C, in another specific embodiment of the utility model 3rd embodiment, the collector ontology
On 1001, advanced ultrasonic bond forms rectangular conductive contact 1002, carries out ultrasound in rectangular 1002 gap of conductive contact later
Weldering forms circular conductive contact 1002.The rectangular conductive contact 1002 is preferably dimensioned to be 1.3mm, and distribution spacing is 5mm；
The circular conductive contact 1002 is preferably dimensioned to be 1.0mm, and distribution spacing is 5mm.
It please refers to Fig. 5 A and Fig. 5 B, in the fourth embodiment of the utility model, provides a kind of collector 100, the collection
Fluid 100 includes collector ontology 1001, conductive contact 1002 and gate electrode 1003.The gate electrode 1003 is in collector ontology
Gridding is set on 1001, and the gate electrode 1003 includes a plurality of grid line 1004, and a plurality of grid line 1004 is by the collector ontology
1001 are divided into the current collection region 1005 of several homalographics, the conductive contact 1002 be distributed in the grid line 1004 intersection point or
At the center in current collection region 1005.
It please refers to Fig. 5 C and Fig. 5 D, in a specific embodiment of the utility model fourth embodiment, provides a kind of collection
Fluid 100, the collector 100 are positive square, and per 1dm2Set gate electrode 1003 wraps on collector ontology 1001
16 main gate lines 1004, the grid line 1004 horizontal and perpendicular each setting 8 on collector ontology 1001 are included, and equidistant vertical is arranged
Cloth, and then collector ontology 1001 is divided into 99 current collection regions 1005.The conductive contact 1002 can be uniformly arranged in often
The center in a current collection region 1005 or the point of intersection of main gate line 1004.
Please refer to Fig. 5 E and Fig. 5 F, in another specific embodiment of the utility model fourth embodiment, the collector
100 for circle, the gate electrode 1003 include along 1001 diametric grid line 1004 of collector ontology and with collector sheet
Body 1001 is the round grid line 1004 of concentric circles distribution, and the circle grid line 1004 sets spacing from 1001 center of circle of collector ontology
Successively decrease successively to 1001 edge of collector ontology, to ensure 1005 area equation of current collection region of the segmentation of grid line 1004.Into
One step, the conductive contact 1002 is set at 1004 point of intersection of grid line or 1005 center of current collection region.
In the above-mentioned another specific embodiment for applying example of the utility model, the conductive contact 1002 is in collector ontology etc.
Spacing is arranged, and distribution density is 18/cm2.Meanwhile one the conductive contact 1002 be starting point, to conductive contact 1,002 4
Week sets aplysia punctata gate electrode 1003, and the gate electrode 1003 can further comprise symmetrical grid line 1004, the grid line
1004 number can be 2-10 items；Preferably, the number of the grid line 1004 can be 2-8 items；Specifically, the grid line 1004
Number can be 2,3,4,5,6,7,8,9 or 10.
Also, multiple grid lines 1004 are angularly distributed with conductive contact 1002 for circle；The length of the grid line 1004, it is excellent
It is selected as 0.3-0.45 of two conductive contacts 1002 along the spacing of grid line extending direction.The number of grid line 1004 described in the present embodiment
Amount preferably 8, the length of the grid line 4002 is preferably, and described two conductive contacts 1002 of conductive contact are along grid line extension side
To spacing 0.45.
Fig. 5 G are please referred to, one applies in another embodiment of example on the utility model, 1001 edge of collector ontology
Place, when the distance of conductive contact 1002 to 1001 edge of collector ontology is less than two 1002 spacing of conductive contact
When 0.45, the grid line 1004 on the conductive contact 1002 of the edge can only be set towards the center position of collector ontology 1001
It puts.The quantity of the grid line 1004 can be 3-8 items；Preferably, the quantity of the grid line 1004 can be 3-6 items；Specifically, it is described
The quantity of grid line 1004 can be 3,4,5,6,7 or 8；The quantity of the grid line 1004 described in present embodiment is preferably 5.
In 5th embodiment of the utility model, a kind of collector 100 is provided, with collector in above-described embodiment
Difference is, collector ontology 1001 is irregular shape, and then the conductive contact 1002 and/or gate electrode 1003 also root
It arranges according to 1001 shape of collector ontology, and then ensures that the every bit on the collector ontology 1001 is touched to closest conduction
The sum of the distance of point 1002 or gate electrode 1003 is minimum.It is appreciated that road of the electric current on collector ontology 1001 at this time
Journey summation is minimum, and then reduces the all-in resistance of the collector 100.
Specifically, the conductive contact 1002 can be shaped to different shapes according to collector ontology 1001,
And the conductive contact 1002 is set as different curvature or is set as different spacing；The gate electrode 1003 equally may be used
To be shaped to different shapes and different distribution spacing according to collector ontology 1001 or set different
Auxiliary grid line 1006 etc..
It please refers to Fig. 6 A to Fig. 6 B, in the sixth embodiment of the utility model, provides a kind of lithium battery electric core 10, it is described
Lithium battery electric core 10 includes the negative current collector 11, cathode 12, electrolyte 13, anode 14 and the plus plate current-collecting body that stack gradually
15.The negative current collector 11 and plus plate current-collecting body 15 are the collection in the above-mentioned first embodiment of the utility model only the 5th embodiment
Fluid 100 on the face of the negative current collector 11 and plus plate current-collecting body 15 far from the electrolyte 13, is provided with conductive contact
1002 and/or gate electrode 1003.The conductive contact 1002 and/or gate electrode 1003 are in the negative current collector 11 and anode collection
Set-up mode on fluid 15, identical with above-mentioned first embodiment to the 5th embodiment, details are not described herein.
In other embodiments of the sixth embodiment of the utility model, the electrolyte 13 and the cathode 12 and
Interface-modifying layer 18 is additionally provided between the anode 14.The interface-modifying layer 18 mainly includes optimizing the electrolysis
Interface performance between matter 13 and the cathode 12 and electrolyte 13 and the anode 14, reduce interface impedance, promote lithium from
Son conduction.The several times decorative layer mainly includes solid electrolyte.
In other embodiments of the utility model sixth embodiment, in the lithium battery electric core 100 and above-described embodiment
Difference be that the lithium battery electric core 100 further includes substrate 19, the negative current collector 11 and/or plus plate current-collecting body 15
Being set on one side in the substrate 19 far from the electrolyte 13.19 1 negative current collector 11 of substrate and just
The separable setting of pole collector 15.
Further, the substrate 19 is from include successively far from the negative current collector 11 and 15 direction of plus plate current-collecting body can
Separately positioned the second substrate 192 and the first substrate 191.First substrate 191 is hard substrate, preferably glass；It is described
Second substrate 192 is flexible substrates, preferably P I films.
Meanwhile 191 and/or second substrate 192 of the first substrate offers through-hole 193, the setting position of the through-hole 193
Put corresponding institute's negative current collector 11 and the conductive contact 1002 on plus plate current-collecting body 15 or the position of gate electrode 1003；It is described
The installation position of through-hole 193 corresponds to institute's negative current collector 11 and conductive contact 1002 or gate electrode on plus plate current-collecting body 15
1003 quantity.Further, it filled with conductive material and is electrically connected and the negative current collector 11 and just in the through-hole 193
Conductive contact 1002 or gate electrode 1003 on pole collector 15；Preferably, it is connected in the through-hole 193 equipped with conducting wire one described
Conductive contact 1002 and/or gate electrode 1003.
In other embodiments of the utility model sixth embodiment, anode collection in the lithium battery electric core 10 is defined
The side of body 15 and negative current collector 12 far from electrolyte 13 is two opposite end faces 1009, lithium battery between both ends of the surface 1009
The surface of battery core 100 is the side 1008 of lithium battery electric core 100.The side 131 of electrolyte 13 and the lithium battery electric core 100
Side 1008 is concordant or part is covered on the side 1008 of the lithium battery electric core 100.It is appreciated that the lithium battery
On the side 1008 of core 100, one layer of electrolyte 13 can be also covered.By being covered on the side of lithium battery electric core 100 1008, only
Conducting lithium ions, and the electrolyte 13 of non-conducting electronics, and then the anode 14 of lithium battery electric core 100 and cathode 12 are effectively prevent,
And short circuit occurs between plus plate current-collecting body 15 and negative current collector 11, battery structure is destroyed, threatens user's personal safety.
It please refers to Fig. 7 A-7H, in the 7th embodiment of the utility model, provides a lithium battery 1, the lithium battery 1 wraps
Include the lithium battery electric core 10 and encapsulating structure 17 in a sixth embodiment.The plus plate current-collecting body 15 of the lithium battery electric core 10 is made
For the plus plate current-collecting body 15 of lithium battery, the negative current collector 11 from lithium battery 10 is as the negative current collector from lithium battery
11.The plus plate current-collecting body 15 and negative current collector 11 are the collector 100 in above-mentioned first embodiment to the 5th embodiment,
This is repeated no more.The encapsulating structure 17 is covered on the side of lithium battery electric core 10 1008.The encapsulating structure 17 is from close
Lithium battery electric core 10 is arrived far from lithium battery electric core 10, folds barrier layer 171, barrier layer 172 and the protective layer 173 set successively.It is described
Encapsulating structure 17 is covered in the side 1008 of the lithium battery electric core 10 or is covered in the side of lithium battery electric core 10 1008 and lithium
On the portion end surface 1009 of 1008 junction of side of battery battery core 10.
The encapsulating structure 17 can be successively formed on lithium battery electric core 10；The encapsulating structure 17 can also be one prefabricated
Encapsulating film is compound in by hot pressing on the lithium battery electric core 10, and then forms the lithium battery 10.
In some embodiments of the utility model, electrolyte 13 is covered on the side 1008 of the lithium battery electric core 10,
The encapsulating structure 17 cover on face of the electrolyte 13 far from the lithium battery electric core 10, and then formed lithium battery 10.
Further, the lithium battery 10, which further includes, is set to plus plate current-collecting body 15 and/or negative current collector 11 far from electricity
Solve the substrate 19 on the face of matter 13, the substrate 19 and the negative current collector 11 and the separable setting of plus plate current-collecting body 15.
Further, the substrate 19 is from include successively far from the negative current collector 11 and 15 direction of plus plate current-collecting body can
Separately positioned the second substrate 191 and the first substrate 192.First substrate 191 is hard substrate, preferably glass；It is described
Second substrate 192 is flexible substrates, preferably PI films.Meanwhile the lithium battery 10 can only include the second substrate 192, and then
Form flexible lithium battery.
Further, the first substrate 191 described in when and/or the second substrate 192 offer through-hole 193, in the through-hole 193
Filled with conductive material and it is electrically connected and the negative current collector 11 and plus plate current-collecting body 15；Preferably, in the through-hole 193
Fill metal conductive contact.Further, 19 area of substrate is more than the anode collection of the lithium battery electric core 10
The area of body 15 or negative current collector 11, the encapsulating structure 17 are covered on the part of substrate 19 of lithium battery electric core 10.
Referring to Fig. 8, in the 8th embodiment of the utility model, a lithium battery 2 is provided, the lithium battery 2 includes two
A above-mentioned lithium battery electric core 10.Setting is stacked between the lithium battery electric core 10, it is positive and negative common that two lithium battery electric cores 10 share one
Pole afflux 5.I.e. described lithium battery electric core 10, which stacks gradually, is provided with negative current collector 11, positive and negative anodes 12, electrolyte 13, anode 14
An and positive and negative copolar collector 5；The cathode 12 of another lithium battery electric core 10 is formed directly into, the positive and negative copolar collector 5 of institute
On face far from the anode 14, setting electrolyte 13, anode 14 and plus plate current-collecting body 15 are then stacked gradually on cathode 12 again.
Wherein, negative current collector of the negative current collector 11 as lithium battery 2；The plus plate current-collecting body 15 is as lithium electricity
The plus plate current-collecting body in pond 2.The plus plate current-collecting body 15 and negative current collector 11 is in above-mentioned first embodiments to the 5th embodiment
Collector 100, details are not described herein.It is appreciated that it is stacked with and shares the lithium battery electric core of a positive and negative copolar collector 5
To be connected in series between 10.Other restrictions of lithium battery are same with the above-mentioned embodiment in this implementation, and details are not described herein；
Referring to Fig. 9, in the 9th embodiment of the utility model, a kind of lithium battery 3 is provided, the lithium battery 3 includes
Multiple lithium battery electric cores 10 for stacking setting, further, the stacking number of the lithium battery electric core 10 is preferably 300-400
It is a.Wherein, a positive and negative copolar collector 5 is shared between each two lithium battery electric core 10.It is appreciated that two adjacent lithium batteries
To be connected in series between battery core 10, further, it is understood that being serially connected between multiple lithium battery electric cores 10 in the lithium battery 3
Connection.The lithium battery electric core 10 is the lithium battery electric core 10 described in above-mentioned sixth embodiment.Lithium battery 30 further includes encapsulation
Structure 37 and substrate 39, set-up mode and the lithium battery between the encapsulating structure 37 and substrate 39 and lithium battery 30
30 other restrictions are same as the previously described embodiments, and details are not described herein.
Compared with prior art, lithium battery electric core provided by the utility model, lithium battery and preparation method thereof have such as
Under advantageous effect：
Collector provided by the utility model by setting conductive contact and/or gate electrode on collection liquid surface, increases
Electric current collection area on big collector；Further, by the way that conductive contact and/or gate electrode is uniform in collection liquid surface
Setting, is uniformly distributed current density on collector, also improves the collection efficiency of electric current；Further, it is external by optimizing
Quantity, shape, distribution form, the distribution density of solder joint so that collection liquid surface every bit to the sum of the distance of closest endpoint
Minimum further makes current density be uniformly distributed in plane collector, and then is less than maximum local surface current density
30mA/m2。
Further, it is designed by optimizing gate electrode figureization, makes balanced current distribution on collection liquid surface, and then make most
Big part surface current density is less than 30mA/m2.Further, conjunction is mutually matched by solder joint and gate electrode, makes collector
Balanced current distribution on surface, and then make the impedance of current density sum aggregate body of fluid minimum.And then make collection liquid surface heat distribution
Uniformly, it and then realizes lithium battery electric core collector and keeps low current density and heat distribution uniform under high voltages, slow down significantly
The attenuation of lithium battery electric core caused by surge, extends the service life of lithium battery electric core, provides large area all solid lithium
The safety of battery.
The described lithium battery electric core provided of the utility model, it is closely knit successively between each layer to stack setting, and lithium battery electric core
Thickness is thin, area is big, and then makes single lithium battery electric core capacity up to more than 2000Wh；And by practical the utility model
The collector of offer, and then can make to make current distribution in afflux dignity uniform in large area lithium battery electric core, and then realize lithium
Battery battery core collector keeps 30mA/m under high voltages2Low current density and heat distribution it is uniform, slow down surge significantly
The attenuation of caused lithium battery electric core, extends the service life of lithium battery electric core, and lithium battery electric core is also made to can reach more than 10C and is filled
Electric discharge.
The lithium battery of offer described in the utility model, by using collector provided by the utility model, and will be multiple
Lithium battery electric core carries out stacking setting, and shares a positive and negative copolar collector between every two adjacent lithium battery electric cores, into
And realize that multiple stackings are connected in series with, but lithium battery reaches more than the output voltage of 1500V；Meanwhile each lithium battery electric core
In closely knit stacking is connected in series between closely knit stacking and each lithium battery electric core between each layer, make lithium battery that can realize 1200Wh/
The energy density of more than kg, single lithium battery electric core capacity is up to more than 2000Wh.
Further, by being uniformly arranged conductive contact and/grid line in the collector to lithium battery or substrate, and then can make
Make current distribution in afflux dignity uniform in large area lithium battery, and then realize lithium battery collector and keep low under high voltages
Current density and heat distribution are uniform, cell decay caused by slowing down surge significantly, extend the service life of lithium battery electric core,
The difficulty of power management is greatly reduced, meanwhile, also achieve lithium battery 10C more than charge and discharge.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Any modification made within the principle of utility model, equivalent replacement and improvement etc. should all include the scope of protection of the utility model
Within.
Claims (10)
1. a kind of collector, for collecting electric current in lithium battery electric core or battery, it is characterised in that：The collector includes afflux
Body ontology and the conductive contact and/or gate electrode being uniformly arranged on face of the collector far from electrolyte.
2. collector as described in claim 1, it is characterised in that：The conductive contact shape can be round, square and not
One or more of regular polygon.
3. collector as claimed in claim 2, it is characterised in that：The conductive contact is on surface of the collector far from electrolyte
It is uniformly and symmetrically distributed, so that the sum of the distance of collector body surface every bit to closest conductive contact is minimum.
4. collector as claimed in claim 3, it is characterised in that：The conductive contact is including Cu, Ni, Au, Ag, Sn or Al etc.
One or more of conductive non-metals such as hard contact and Si or C, the conductive contact can pass through ultrasonic welding, laser
Welding, coating or one kind in vacuum deposition or combination are formed in surface of the collector far from electrolyte.
5. collector as claimed in claim 4, it is characterised in that：The conductive contact can pass through ultrasonic welding or laser welding
In one kind or combination be formed in surface of the collector far from electrolyte.
6. collector as described in claim 1, it is characterised in that：The gate electrode includes the grid line being uniformly arranged, the grid
For the shape of electrode including one or more in square, round, symmetric polygonal or radial type, the gate electrode can pass through painting
Cloth or silk-screen printing are formed in surface of the collector far from electrolyte.
7. collector as described in claim 1, it is characterised in that：The collector maximum local current densities are less than 30mA/
m2。
8. such as claim 1-7 any one of them collectors, it is characterised in that：The conductive contact is uniformly distributed in grid friendship
On point or on grid center.
9. a kind of lithium battery electric core, it is characterised in that：Including collector as claimed in claim 7.
10. a kind of lithium battery, it is characterised in that：Including one or more lithium battery electric cores as claimed in claim 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721776315.0U CN207602688U (en) | 2017-12-19 | 2017-12-19 | A kind of collector, lithium battery electric core and lithium battery |
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|---|---|---|---|
| CN201721776315.0U CN207602688U (en) | 2017-12-19 | 2017-12-19 | A kind of collector, lithium battery electric core and lithium battery |
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| CN207602688U true CN207602688U (en) | 2018-07-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109935839A (en) * | 2017-12-19 | 2019-06-25 | 成都亦道科技合伙企业（有限合伙） | A kind of collector, lithium battery electric core and lithium battery |
-
2017
- 2017-12-19 CN CN201721776315.0U patent/CN207602688U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109935839A (en) * | 2017-12-19 | 2019-06-25 | 成都亦道科技合伙企业（有限合伙） | A kind of collector, lithium battery electric core and lithium battery |
| CN109935839B (en) * | 2017-12-19 | 2024-04-02 | 成都大超科技有限公司 | Current collector, lithium battery cell and lithium battery |
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