CN109935839A - 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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- CN109935839A CN109935839A CN201711371270.3A CN201711371270A CN109935839A CN 109935839 A CN109935839 A CN 109935839A CN 201711371270 A CN201711371270 A CN 201711371270A CN 109935839 A CN109935839 A CN 109935839A
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- collector
- lithium battery
- conductive contact
- electric core
- battery electric
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 156
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 156
- 239000003792 electrolyte Substances 0.000 claims abstract description 29
- 238000003466 welding Methods 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 229910052737 gold Inorganic materials 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000007650 screen-printing Methods 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 238000001771 vacuum deposition Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 229910052755 nonmetal Inorganic materials 0.000 claims 1
- 150000002843 nonmetals Chemical class 0.000 claims 1
- 238000010422 painting Methods 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 39
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000000758 substrate Substances 0.000 description 30
- 238000010586 diagram Methods 0.000 description 15
- 239000007788 liquid Substances 0.000 description 11
- 239000010410 layer Substances 0.000 description 10
- 239000010949 copper Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000005611 electricity Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 238000005538 encapsulation Methods 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 241001235022 Aplysia punctata Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000010944 silver (metal) Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention relates to field of lithium more particularly to a kind of collector, lithium battery electric core and lithium battery, the collector includes collector ontology and is uniformly arranged on the collector far from the conductive contact and/or gate electrode on the face of electrolyte；The lithium battery electric core includes the negative current collector for stacking gradually setting, negative electrode layer, electrolyte layer, anode layer and plus plate current-collecting body, 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 present invention relates to field of lithium more particularly to a kind of collectors, lithium battery electric core and lithium battery.
[background technique]
Current lithium battery electric core and lithium battery are drawn using aluminium, copper as current collector material, and by tab, are realized multiple
Battery unit parallel connection and it is external.For traditional small area lithium battery, due to its battery capacity density is lower, charging/discharging voltage compared with
It is small, therefore the current density on its electrode current collecting body surface is lower, will not generate larger heat, as long as guaranteeing do not occur biggish electric current
Short circuit biggish heat would not occurs and be unevenly distributed, therefore not need the optimization that electric current collection is done to collector 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 such a way that traditional only a small amount of tab 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 the matching of battery material heat-conductive characteristic is bad, it may appear that and local temperature is excessively high, material is caused to expand,
Breakage, or even material melts, spontaneous combustion is caused even to 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
Pass through positive and negative electrode collection ear inflow/outflow at the parallel operation electric current of unit.That there are operating voltages is lower for above-mentioned connection method, is
Raising charge or discharge power generally requires to improve operating current, due to cell degradation attenuation process caused by surge
Accelerate.In addition, electric current is distributed by the lesser tab 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.
[summary of the invention]
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 present invention provides collector, lithium battery electric core and lithium batteries.
It is as follows that the present invention provides a technical solution to solve above-mentioned technical problem: a kind of collector, for collecting lithium battery
Electric current in battery core or battery, the collector include collector ontology and are uniformly arranged on face of the collector far from electrolyte
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 in collector far from the surface of 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 hard contacts such as Cu, Ni, Au, Ag, Sn or Al and Si or C etc. conductive non-
One or more of metal, the conductive contact can pass through one of ultrasonic welding, laser welding, coating or vacuum deposition
Or combination is formed in surface of the collector far from electrolyte.
Preferably, the conductive contact can be formed in the collection by one of ultrasonic welding or laser welding or combination
Surface of the fluid far from electrolyte.
Preferably, the gate electrode includes the grid line being uniformly arranged, the shape of the gate electrode include square, it is round,
One of symmetric polygonal or radial type are a variety of, and 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 present invention provides a technical solution to solve above-mentioned technical problem: a kind of lithium battery electric core, including institute as above
The collector stated.
It is as follows that the present invention provides a technical solution to solve above-mentioned technical problem: a kind of lithium battery, including one or more
Lithium battery electric core as described above.
Compared with prior art, lithium battery electric core provided by the present invention, lithium battery and preparation method thereof have as follows
The utility model has the advantages that
Collector provided by the present invention is increased by the way that conductive contact and/or gate electrode are arranged on collection liquid surface
Electric current collection area on collector；Further, by uniformly setting conductive contact and/or gate electrode in collection liquid surface
It sets, is uniformly distributed current density on collector, also improve the collection efficiency of electric current；Further, by optimizing external weldering
Point quantity, shape, distribution form, distribution density so that collection liquid surface every bit to closest endpoint sum of the distance most
It is small, it is uniformly distributed current density in plane collector, and then maximum local surface current density is made to be less than 30mA/
m2。
Further, by optimization gate electrode figureization design, make 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 keep 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 decaying 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 lithium battery electric core provided of the invention described, successively closely knit stackings is arranged between each layer, and lithium battery electric core thickness
It is thin, area is big, and then make single lithium battery electric core capacity up to 2000Wh or more；And pass through practical collection provided in the present invention
Fluid, and then can make to make in large area lithium battery electric core current distribution in afflux dignity uniform, and then realize lithium battery electric core
Collector keeps 30mA/m under high voltages2Low current density and heat distribution it is uniform, slow down lithium caused by surge significantly
The decaying of battery battery core, extends the service life of lithium battery electric core, and lithium battery electric core is also made to can reach 10C or more charge and discharge.
The lithium battery of offer of the present invention, by using collector provided by the present invention, and by multiple lithium batteries
Core carries out stacking setting, and a positive and negative copolar collector is shared between every two adjacent lithium battery electric cores, and then realize more
A stacking is connected in series, but lithium battery reaches more than the output voltage of 1500V；Meanwhile in each lithium battery electric core each layer it
Between between closely knit stacking and each lithium battery electric core closely knit stacking be connected in series, make lithium battery that can realize 1200Wh/kg's or more
Energy density, single lithium battery electric core capacity is up to 2000Wh or more.
Further, by being uniformly arranged conductive contact and/grid line on collector to lithium battery or substrate, and then can make
Make current distribution in afflux dignity uniform in large area lithium battery, and then realizes lithium battery collector and keep low under high voltages
Current density and heat distribution are uniform, slow down cell decay caused by surge significantly, extend the service life of lithium battery electric core,
The difficulty of power management is greatly reduced, meanwhile, also achieve the above charge and discharge of lithium battery 10C.
[Detailed description of the invention]
Fig. 1 is that the present invention first is collector schematic front view in embodiment.
Fig. 2 is that collector of the present invention and external terminal cooperate schematic diagram.
Fig. 3 A is collector schematic front view in second embodiment of the invention.
Fig. 3 B is that collector one deforms schematic diagram in Fig. 3 A of the present invention
Fig. 4 A is collector schematic front view in third embodiment of the invention.
Fig. 4 B is that collector one deforms schematic diagram in Fig. 4 A of the present invention.
Fig. 4 C is another deformation schematic diagram of collector in Fig. 4 A of the present invention.
Fig. 5 A is collector schematic front view in fourth embodiment of the invention.
Fig. 5 B, Fig. 5 C, Fig. 5 D, Fig. 5 E, Fig. 5 F, to Fig. 5 G be in Fig. 5 A of the present invention collector deform schematic diagram.
Fig. 6 A is electric core structure of lithium battery schematic diagram and lithium battery electric core and external endpoint in sixth embodiment of the invention
Cooperate schematic diagram.
Fig. 6 B is that electric lithium battery electric core one deforms schematic diagram in the present invention.
Fig. 7 A is lithium battery structure schematic diagram in seventh embodiment of the invention.
Fig. 7 B is lithium cell encapsulation construction schematic diagram in the present invention.
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 is the portion A enlarged diagram in Fig. 7 D.
Fig. 7 H is the portion B enlarged diagram in Fig. 7 G.
Fig. 8 is lithium battery structure schematic diagram in eighth embodiment of the invention.
Fig. 9 is lithium battery structure schematic diagram in ninth embodiment of the invention.
[specific embodiment]
In order to make the purpose of the present invention, technical solution and advantage are more clearly understood, below in conjunction with attached drawing and embodiment,
The present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
It please refers in Fig. 1 and Fig. 2 first embodiment of the present invention, provides a kind of collector 100, the collector 100
For by collecting and conducting electric current, the collector 100 can be any one or more in Cu, Ni, Au, Ag, Al, Si or C；
Further, the collector 100 is preferably the alloy of one or more of Cu or Cu and Ni, Au, Ag, Al, Si or C.Its
Main includes collector ontology 1001 and the conductive contact 1002 and gate electrode 1003 for being set to 101 one side of collector ontology.Institute
Conductive contact 1002 and gate electrode 1003 is stated to be uniformly distributed on the collector 100.The conductive contact 1002 or gate electrode
1003 are 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 of ultrasonic welding, laser welding, coating or vacuum deposition or combination 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 forms various shape by various arrangement forms
Gate electrode 1003.The shape of the gate electrode 1003 include one of square, round, symmetric polygonal or 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。
Please refer to Fig. 3 A, in the second embodiment of the present invention, provide a collector 100, in above-described embodiment not
Same to be, the collector 100 includes collector ontology 1001 and gate electrode 1003, and 1003 gridding of gate electrode 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 main gate line
Collector ontology 1001 is stated in place by 1004 is divided into several current collection regions 1005.The auxiliary grid line 1006 can be further disposed upon
In the current collection region 1005, and connect the main gate line 1004.
In one specific embodiment of second embodiment of the invention, every 1dm2It is evenly distributed on collector ontology 1001
(5-20) main gate line 1004；Further, every 1dm2(6-16) main gate line is evenly distributed on collector ontology 1001
1004；Specifically, every 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 second embodiment of the invention, the collector 100 is positive square, and every 1dm2
Set gate electrode 1003 includes 16 main gate lines 1004 on collector ontology 1001, and the main gate line 1004 is in collector sheet
One is horizontal and erect each setting 8 on body 1001, and equidistant vertical is arranged, and then collector ontology 1001 is divided into 99 collecting zones
Domain 1005.
Please referring to Fig. 3 B, in another specific embodiment of second embodiment of the invention, the collector 100 is circle,
The gate electrode 1003 include two along the diametric main gate line 1004 of collector ontology 1001, and with collector ontology
Spacing is arranged from the circle of collector ontology 1001 in the 1001 round main gate lines 1004 being distributed for concentric circles, the circle main gate line 1004
The heart successively successively decreases to 1001 edge of collector ontology, to guarantee to divide 1005 face of current collection region of formation between the grid line 1004
Product is equal.
Please refer to Fig. 4 A, in the third embodiment of the present invention, provide a collector 100, with it is above-mentioned be in embodiment
The difference lies in that it is with difference in above-described embodiment, the collector 100 includes collector ontology 1001 and conductive touching
Point 1002,1002 matrix of conductive contact arrangement and then make on collector ontology 1001 on the collector ontology 1001
Each point is minimum to the total distance on closest conductive contact 1002.It is appreciated that the sum of described electric current distance is most at this time
It is small, and then reduce the all-in resistance of power collector 100.
In the present invention in a specific embodiment of an embodiment, the conductive contact 1002 is on collector ontology 1001
Distribution density be (0.25-15) it is a/cm2；Further, distribution of the conductive contact 1002 on collector ontology 1001
Density be (1-10) it is a/cm2；Specifically, distribution density of the institute's conductive contact 1002 on collector ontology 1001 be 0.25/
cm2, 0.5/cm2, 1/cm2, 2/cm2, 3/cm2, 4/cm2, 8/cm2, 10/cm2, 15/cm2, 18/cm2
Or 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 third embodiment of the invention, the conductive contact 1002
Including forming rectangular conductive contact by ultrasonic soldering method, the size of the rectangular conductive contact is 0.4-2.0mm2；Further
, the size of the conductive welding spots 4002 can also be 1.0-1.7mm2；Specifically, the size of the conductive welding spots 4002 includes
0.4.0mm2、0.7mm2、1.0mm2、1.1mm2、1.3mm2、1.6mm2、1.7mm2Or 2.0mm2, the rectangular conductive contact 1002
Equidistant arrangement, rectangular 1002 branch's spacing of conductive contact are not less than 0.6mm.Side described in further the present embodiment
Shape conductive contact 1002 is preferably dimensioned to be 1.3mm2, distribution spacing is 5mm.
Please refer to Fig. 4 B, in another specific embodiment of third embodiment of the invention, the conductive contact 1002 includes
Circular conductive contact 1002 is formed by laser soldering method, the diameter of the circular conductive contact 1002 is 0.7-1.1mm2；Into
One step, the size of the conductive welding spots 4002 can also be 0.8-1.0mm2；Specifically, the circular conductive solder joint 4002
Size includes 0.7mm2、0.8mm2、0.9mm2、1.0mm2Or 1.1mm2, the circular conductive contact 1002 is equidistantly arranged, described
1002 branch's spacing of circular conductive contact is not less than 0.5mm.Circular conductive contact 1002 described in further the present embodiment
It is preferably dimensioned to be 1.0mm2, distribution spacing is 5mm.
Please refer to Fig. 4 C, in another specific embodiment of third embodiment of the invention, on the collector ontology 1001,
Advanced ultrasonic bond forms rectangular conductive contact 1002, carries out ultrasonic bond in rectangular 1002 gap of conductive contact later, is formed
Circular conductive contact 1002.The rectangular conductive contact 1002 is preferably dimensioned to be 1.3mm, and distribution spacing is 5mm；The circle
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 present invention, provides a kind of collector 100, the collector
100 include collector ontology 1001, conductive contact 1002 and gate electrode 1003.The gate electrode 1003 is in collector ontology 1001
Upper gridding setting, the gate electrode 1003 include a plurality of grid line 1004, and a plurality of grid line 1004 is by the collector ontology 1001
It is divided into the current collection region 1005 of several homalographics, the conductive contact 1002 is distributed in the intersection point or current collection of the grid line 1004
At the center in region 1005.
It please refers to Fig. 5 C and Fig. 5 D, in a specific embodiment of fourth embodiment of the invention, provides a kind of collector
100, the collector 100 is positive square, and every 1dm2Set gate electrode 1003 includes 16 on collector ontology 1001
Main gate line 1004, the grid line 1004 is one horizontal and erect each setting 8 on collector ontology 1001, and equidistant vertical is arranged,
And then collector ontology 1001 is divided into 99 current collection regions 1005.The conductive contact 1002 can uniformly be arranged in each collection
The center in electric 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 fourth embodiment of the invention, the collector 100 is
Circle, the gate electrode 1003 include along the diametric grid line 1004 of collector ontology 1001, and with collector ontology
1001 for concentric circles distribution round grid lines 1004, it is described circle grid line 1004 be arranged spacing from 1001 center of circle of collector ontology to
1001 edge of collector ontology successively successively decreases, to guarantee 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 present invention, the conductive contact 1002 is equidistant in collector ontology
Arrangement, distribution density are 18/cm2.Meanwhile one the conductive contact 1002 be starting point, set to 1002 surrounding of conductive contact
Aplysia punctata gate electrode 1003 is set, the gate electrode 1003 can further comprise symmetrical grid line 1004, the grid line 1004
Number can be 2-10 item；Preferably, the number of the grid line 1004 can be 2-8 item；Specifically, the number of the grid line 1004
It can be 2,3,4,5,6,7,8,9 or 10.Also, multiple grid lines 1004 are that circle is angularly distributed with conductive contact 1002；It is described
The length of grid line 1004,0.3-0.45 of preferably two conductive contacts 1002 along the spacing of grid line extending direction.The present embodiment
Described in the quantity of grid line 1004 be preferably 8, the length of the grid line 4002 is preferably the conductive contact two conductive touchings
Point 1002 along grid line extending direction spacing 0.45.
Fig. 5 G is please referred to, in the present invention in another embodiment of an embodiment, 1001 edge of collector ontology
, when conductive contact 1002 arrives less than two 1002 spacing of conductive contact of distance of 1001 edge of collector ontology
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 sets.The quantity of the grid line 1004 can be 3-8 item；Preferably, the quantity of the grid line 1004 can be 3-6 item；Specifically, described
The quantity of grid line 1004 can be 3,4,5,6,7 or 8；The quantity of grid line 1004 described in present embodiment is preferably 5.
In the fifth embodiment of the present invention, a kind of collector 100, the difference with collector in above-described embodiment are provided
Point is that collector ontology 1001 is irregular shape, and then the conductive contact 1002 and/or gate electrode 1003 are also according to collection
The arrangement of 1001 shape of body of fluid, and then guarantee the every bit on the collector ontology 1001 to closest conductive contact
1002 or gate electrode 1003 sum of the distance it is minimum.It is appreciated that distance of the electric current on collector ontology 1001 at this time
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 different curvature is set by the conductive contact 1002, or be 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 it is arranged different
Auxiliary grid line 1006 etc..
It please refers to Fig. 6 A to Fig. 6 B, in the sixth embodiment of the present invention, provides a kind of lithium battery electric core 10, the lithium electricity
Pond battery core 10 includes the negative current collector 11 stacked gradually, cathode 12, electrolyte 13, anode 14 and plus plate current-collecting body 15.Institute
It states negative current collector 11 and plus plate current-collecting body 15 is the collector 100 in the present invention the 5th embodiment of above-mentioned first embodiment,
On the face of the negative current collector 11 and plus plate current-collecting body 15 far from the electrolyte 13, be provided with conductive contact 1002 and/or
Gate electrode 1003.The conductive contact 1002 and/or gate electrode 1003 are on the negative current collector 11 and plus plate current-collecting body 15
Set-up mode, identical into the 5th embodiment as above-mentioned first embodiment, details are not described herein.
In other embodiments of the sixth embodiment of the present invention, the electrolyte 13 and the cathode 12, and with institute
It states and is additionally provided with interface-modifying layer 18 between anode 14.The interface-modifying layer 18 includes mainly for optimizing the electrolyte 13
With the interface performance between the cathode 12 and electrolyte 13 and described positive 14, interface impedance is reduced, lithium ion is promoted to pass
It leads.The several times decorative layer mainly includes solid electrolyte.
In other embodiments of sixth embodiment of the invention, in the lithium battery electric core 100 and above-described embodiment not
It is with putting, the lithium battery electric core 100 further includes substrate 19, and the negative current collector 11 and/or plus plate current-collecting body 15 are separate
The electrolyte 13 is set on one side in the substrate 19.The substrate 19 1 negative current collector 11 and plus plate current-collecting body
15 separable settings.
Further, the substrate 19 from successively include 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 PI film.
Meanwhile first substrate 191 and/or the second substrate 192 offer through-hole 193, the setting position of the through-hole 193
Set the position of corresponding institute's negative current collector 11 and conductive contact 1002 or gate electrode 1003 on plus plate current-collecting body 15；It is described
The setting 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 sixth embodiment of the invention, plus plate current-collecting body 15 in the lithium battery electric core 10 is defined
And side of the negative current collector 12 far from electrolyte 13 is two opposite end faces 1009, lithium battery electric core between both ends of the surface 1009
100 surface is the side 1008 of lithium battery electric core 100.The side of the side 131 of electrolyte 13 and the lithium battery electric core 100
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 electric core 100
Side 1008 on, can also cover one layer of electrolyte 13.By being covered on the side of lithium battery electric core 100 1008, only conduct
Lithium ion, and the electrolyte 13 of non-conducting electronics, and then it is effectively prevent the anode 14 and cathode 12 of lithium battery electric core 100, and
Short circuit occurs between plus plate current-collecting body 15 and negative current collector 11, destroys battery structure, threatens user's personal safety.
It please refers to Fig. 7 A-7H, in the seventh embodiment of the present invention, provides a lithium battery 1, the lithium battery 1 includes one
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 used as lithium
The plus plate current-collecting body 15 of battery, the negative current collector 11 from lithium battery 10 is as the negative current collector 11 from lithium battery.Institute
It states plus plate current-collecting body 15 and negative current collector 11 is collector 100 of the above-mentioned first embodiment into the 5th embodiment, herein not
It repeats again.The encapsulating structure 17 is covered on the side of lithium battery electric core 10 1008.The encapsulating structure 17 is from close to lithium electricity
Pond battery core 10 is arrived far from lithium battery electric core 10, successively folds barrier layer 171, barrier layer 172 and the protective layer 173 set.The encapsulation
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 battery
On the portion end surface 1009 of 1008 junction of side of battery core 10.
The encapsulating structure 17 can be successively formed on lithium battery electric core 10；The encapsulating structure 17 can also be prefabricated for one
Encapsulating film is compound on the lithium battery electric core 10 by hot pressing, and then forms the lithium battery 10.
In some embodiments of the present invention, electrolyte 13 is covered on the side 1008 of the lithium battery electric core 10, it is described
Encapsulating structure 17 is covered on face of the electrolyte 13 far from the lithium battery electric core 10, and then forms lithium battery 10.
Further, the lithium battery 10 further includes being 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 from successively include 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；Second substrate 192 is flexible substrates, preferably PI film.Meanwhile the lithium battery 10 can
Only include the second substrate 192, and then forms flexible lithium battery.
Further, Shi Suoshu the first substrate 191 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,
Filling metal conductive contact in the through-hole 193.Further, 19 area of substrate is greater than the lithium electricity
The plus plate current-collecting body 15 of pond battery core 10 or the area of negative current collector 11, the encapsulating structure 17 are covered in lithium battery electric core 10
On part of substrate 19.
Referring to Fig. 8, providing a lithium battery 2 in the eighth embodiment of the present invention, the lithium battery 2 includes on two
State lithium battery electric core 10.Setting is stacked between the lithium battery electric core 10, two lithium battery electric cores 10 share a positive and negative copolar collection
Stream 5.The i.e. described lithium battery electric core 10 stack gradually be provided with negative current collector 11, positive and negative anodes 12, electrolyte 13, anode 14 and
One positive and negative copolar collector 5；The cathode 12 of another lithium battery electric core 10 is formed directly into, and the positive and negative copolar collector 5 of institute is separate
On positive 14 face, 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 are above-mentioned first embodiment into the 5th embodiment
Collector 100, details are not described herein.It is appreciated that being stacked with and sharing the lithium battery electric core of a positive and negative copolar collector 5
It is series connection 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, providing a kind of lithium battery 3 in the ninth embodiment of the present invention, the lithium battery 3 includes multiple
The lithium battery electric core 10 of setting is stacked, further, the stacking number of the lithium battery electric core 10 is preferably 300-400.Its
In, a positive and negative copolar collector 5 is shared between every two lithium battery electric core 10.It is appreciated that two adjacent lithium battery electric cores
It is series connection between 10, further, it is understood that the company of being serially connected between multiple lithium battery electric cores 10 in the lithium battery 3
It connects.The lithium battery electric core 10 is lithium battery electric core 10 described in above-mentioned sixth embodiment.Lithium battery 30 further includes encapsulation knot
Structure 37 and substrate 39, set-up mode and the lithium battery 30 between the encapsulating structure 37 and substrate 39 and lithium battery 30
Other restrictions it is same as the previously described embodiments, details are not described herein.
Compared with prior art, lithium battery electric core provided by the present invention, lithium battery and preparation method thereof have as follows
The utility model has the advantages that
Collector provided by the present invention is increased by the way that conductive contact and/or gate electrode are arranged on collection liquid surface
Electric current collection area on collector；Further, by uniformly setting conductive contact and/or gate electrode in collection liquid surface
It sets, is uniformly distributed current density on collector, also improve the collection efficiency of electric current；Further, by optimizing external weldering
Point quantity, shape, distribution form, distribution density so that collection liquid surface every bit to closest endpoint sum of the distance most
It is small, it is uniformly distributed current density in plane collector, and then maximum local surface current density is made to be less than 30mA/
m2。
Further, by optimization gate electrode figureization design, make 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 keep 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 decaying 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 lithium battery electric core provided of the invention described, successively closely knit stackings is arranged between each layer, and lithium battery electric core thickness
It is thin, area is big, and then make single lithium battery electric core capacity up to 2000Wh or more；And pass through practical collection provided in the present invention
Fluid, and then can make to make in large area lithium battery electric core current distribution in afflux dignity uniform, and then realize lithium battery electric core
Collector keeps 30mA/m under high voltages2Low current density and heat distribution it is uniform, slow down lithium caused by surge significantly
The decaying of battery battery core, extends the service life of lithium battery electric core, and lithium battery electric core is also made to can reach 10C or more charge and discharge.
The lithium battery of offer of the present invention, by using collector provided by the present invention, and by multiple lithium batteries
Core carries out stacking setting, and a positive and negative copolar collector is shared between every two adjacent lithium battery electric cores, and then realize more
A stacking is connected in series, but lithium battery reaches more than the output voltage of 1500V；Meanwhile in each lithium battery electric core each layer it
Between between closely knit stacking and each lithium battery electric core closely knit stacking be connected in series, make lithium battery that can realize 1200Wh/kg's or more
Energy density, single lithium battery electric core capacity is up to 2000Wh or more.
Further, by being uniformly arranged conductive contact and/grid line on collector to lithium battery or substrate, and then can make
Make current distribution in afflux dignity uniform in large area lithium battery, and then realizes lithium battery collector and keep low under high voltages
Current density and heat distribution are uniform, slow down cell decay caused by surge significantly, extend the service life of lithium battery electric core,
The difficulty of power management is greatly reduced, meanwhile, also achieve the above charge and discharge of lithium battery 10C.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in original of the invention
Made any modification within then, equivalent replacement and improvement etc. should all be comprising within protection scope of the present invention.
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 collector is uniformly arranged on far from the conductive contact and/or gate electrode on the face of electrolyte.
2. collector as described in claim 1, it is characterised in that: the conductive contact shape can for 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 includes 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
One of welding, coating or 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
One of 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
The shape of electrode includes one of square, round, symmetric polygonal or radial type or a variety of, and 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 the described in any item collectors of claim 1-7, 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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| CN109935839B (en) | 2024-04-02 |
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