CN109774126A - Device, method and the three-dimensional lithium ion battery of 3D printing three-dimensional lithium ion battery - Google Patents
Device, method and the three-dimensional lithium ion battery of 3D printing three-dimensional lithium ion battery Download PDFInfo
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- CN109774126A CN109774126A CN201811643857.XA CN201811643857A CN109774126A CN 109774126 A CN109774126 A CN 109774126A CN 201811643857 A CN201811643857 A CN 201811643857A CN 109774126 A CN109774126 A CN 109774126A
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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 present invention provides device, method and the three-dimensional lithium ion battery of a kind of 3D printing three-dimensional lithium ion battery, belongs to battery manufacturing field.The inventive system comprises the print member of motion platform and setting on the moving platform, the print member include the identical extrusion device of 3 line structures and with the coextrusion spray head that is connected respectively with 3 extrusion devices, the extrusion device includes the driving device for accommodating and squeezing out the extrusion of printing slurry, the driving extrusion extrusion slurry, setting contacts on the drive means, with contact, and the sensor of slurry velocity is squeezed out for controlling extrusion；It is equipped with three runners being connected respectively with 3 extrusion delivery outlets in the coextrusion spray head, the coextrusion runner communicated respectively with three runners is additionally provided in the bottom end of the runner.The invention has the benefit that can produce, outer dimension is small, and high performance three-dimensional lithium ion battery is flexible high and at low cost.
Description
Technical field
The present invention relates to battery manufacture more particularly to a kind of devices of 3D printing three-dimensional lithium ion battery, are based on the dress
The Method of printing set further relates to a kind of three-dimensional lithium ion battery printed using the Method of printing.
Background technique
The 3D printing of coextrusion formula is mainly characterized by a variety of out by a nozzle print as a kind of emerging 3D printing method
Material makes the layer-by-layer accumulation molding of a variety of materials from bottom to top, can manufacture the device for needing more materials and having complicated shape.It passes
The structure of system lithium ion battery includes button, pillar, rectangular cell etc., and structure is that negative electrode material and positive electrode pass through coating
Mode be made again by winding, being laminated with certain thickness lithium ion battery in conjunction with collector.Its structure is substantially gone back
It is two-dimentional lithium ion battery.The defect in structure that two-dimentional lithium battery is kept away not open forever is can not to be come by increasing electrode height
Lithium ion battery is set to improve the energy density of battery while not influencing power density.And three-dimensional lithium ion battery passes through design
High electrode three-dimensional space structure distribution, as column staggered array type, sheet alternating expression, concentric arry formula and it is random with one heart
Formula, do not reduce between lithium battery positive and negative anodes apart from while increase positive and negative anodes specific surface area, be solve battery in power
Increase its energy density while density is constant and provides a thinking.
At this stage about in the report of three-dimensional lithium ion battery, the technique used is mostly manufactured positive and negative anodes respectively,
Gel state electrolyte is added in wherein gap, or is sandwiched in diaphragm both ends and is filled with electrolyte, is formed finally by encapsulation
Lithium ion battery.And three-dimensional lithium ion battery is manufactured by coextrusion formula 3D printing, advantage is by developing new be suitble to
In lithium ion battery material spray head and coextrusion formula 3D printing device, configuration be suitable for printing slurry come carry out three-dimensional lithium from
The manufacture of sub- battery makes positive and negative anodes and diaphragm slurry carry out the integrated printing shaping of labyrinth.
It is less by preparing the report that battery correlation slurry makes three-dimensional lithium ion battery using 3D printing, and there is no and make
3D printing is carried out by coextrusion processes with a variety of slurries.Wherein the battery plus-negative plate slurry in report is mostly by positive and negative anodes active matter
Matter powder addition binder and its solvent configure, and slurry low-temperature setting characteristic is low with the electrode porosity printed.Every
Film slurry be also in this way, by a polymer solution add ceramic powders be sufficiently mixed after printed, since polymer is molten
Shaping speed is slow at low ambient temperatures for agent fusing point height, therefore 3D printing slurry is coextruded in the case where carrying out low temperature environment need to be added low melting point
Liquid phase come auxiliary slurry solidification.
Therefore existing spray head, 3D printing equipment, anode and cathode slurry and diaphragm slurry not can be carried out coextrusion printing three-dimensional
The manufacture of lithium ion battery, and there is no the alternative coextrusion 3D printing of technique manufacture three-dimensional lithium battery make its positive and negative anodes and diaphragm it
Between combine closely.Therefore, existing co-extrusion device has yet to be improved and developed with positive and negative anodes, diaphragm slurry.
Summary of the invention
To solve the problems of the prior art, the present invention provides a kind of device of 3D printing three-dimensional lithium ion battery, also mentions
For a kind of Method of printing based on described device, and using the three-dimensional lithium ion battery of Method of printing printing.
The device of 3D printing three-dimensional lithium ion battery of the present invention includes the printing of motion platform and setting on the moving platform
Component, the print member include the identical extrusion device of 3 line structures and spray with the coextrusion being connected respectively with 3 extrusion devices
Head, the extrusion device include for accommodating and squeezing out the extrusion of printing slurry, the driving extrusion extrusion slurry
Driving device, setting contact on the drive means, with contact, and the sensor of slurry velocity is squeezed out for controlling extrusion；Institute
It states in coextrusion spray head and is equipped with three runners being connected respectively with 3 extrusion delivery outlets, be additionally provided in the bottom end of the runner
The coextrusion runner communicated respectively with three runners.
The present invention is further improved, and the motion platform includes the pedestal of fixed print member, places lithium ion battery
The platform of substrate controls the Y-axis motion servo that X-axis motion servo motor, the control pedestal that pedestal is moved along X-axis are moved along Y-axis
The Z axis motion servo motor and the control pedestal rotary shaft that central axis rotates horizontally along longitudinal direction that motor, control platform are moved along Z axis
Servo motor.
The present invention is further improved, and the driving device is the vertically arranged motor of motor shaft, the bottom of the motor
Equipped with the straight-line motion mechanism being driven by motor, the straight-line motion mechanism is equipped with pressure sensor, the pressure sensor
Connect at the top of extrusion.
The present invention is further improved, and the extrusion is needle tubing, and the straight-line motion mechanism includes being vertically provided at peace
Guide rail in loading board, sliding block being connected with motor shaft, can moving up and down on guide rail, the pressure sensor are arranged in needle
On the sliding block on the push rod top of pipe, the guide rail bottom is equipped with bearing block, and the needle tubing is fixed on a mounting board by axle sleeve.
The present invention is further improved, and the dress being connected with extrusion device is arranged in by spray nozzle fixture in the coextrusion spray head
It postpones on plate, the coextrusion spray head is arranged along setting substantially symmetrical about its central axis, second flow channel and coextrusion runner is indulged in vertical central axis
On, first runner and third flow channel are separately positioned at left and right sides of second flow channel, and are converged with second flow channel in bottom end, first-class
Road, second flow channel, third flow channel top be respectively equipped with capillary, the coextrusion spray head is equipped with location structure, the spray
Fixture head is equipped with the locating piece and fixing piece cooperated with location structure.
The present invention is further improved, and the coextrusion spray head is equipped with positioning right angle and location hole, the spray nozzle fixture
Be equipped with spray head locating piece with positioning right angle corresponding position, be additionally provided on the spray nozzle fixture with spray nozzle fixture it is hinged for fixing institute
The briquetting of coextrusion spray head is stated, the location hole can limit briquetting rotation position.
The present invention is further improved, and it is unanimously deeply 0.3mm's that the first runner, second flow channel, third flow channel, which are wide,
Rectangular elongated slot, the coextrusion runner are the rectangular elongated slot of width 0.6mm, depth 0.3mm.
The present invention also provides a kind of Method of printings based on described device, include the following steps:
S1: configuration conductive silver glue and diaphragm slurry 2, configuration anode and cathode slurry and diaphragm slurry 1；
S2: setting printing path and print parameters；
S3: diaphragm slurry 2 is added in the extrusion being connected with intermediate runner, and conductive silver glue is added and two side runners
In connected extrusion, in the printing for carrying out conductive layer on mica sheet, wherein print temperature is -10~-20 degrees Celsius；
S4: tab is placed in corresponding position；
S5: diaphragm slurry 1 is added in the extrusion being connected with intermediate runner, anode sizing agent and negative electrode slurry difference
It is added in the extrusion being connected with two side runners, in progress material layer printing on conductive layer, wherein print temperature is -10~-20
Degree Celsius；
S6: it is dried after being freeze-dried to battery；
S7: soft-package battery encapsulation is carried out to the battery after drying.
The present invention uses the three-dimensional lithium ion battery of Method of printing printing, and the substrate including insulation is disposed on the substrate
Printing battery, by conductive silver glue with the tab that is connected of printing battery the two poles of the earth, wherein the printing battery including 1 with
On concatenated micro cell unit, wherein the micro cell unit includes conductive layer and setting square material layer on the electrically conductive,
The conductive layer includes the second diaphragm pulp layer that centre is arranged in and the conductive silver glue that the second diaphragm pulp layer two sides are arranged in
Layer, the material layer include that the first intermediate diaphragm pulp layer is arranged in starch with the anode that the first diaphragm pulp layer two sides are arranged in
The bed of material and negative electrode slurry layer, wherein the first diaphragm pulp layer and the second diaphragm pulp layer are correspondingly arranged, the anode sizing agent
Layer is correspondingly arranged with ipsilateral conductive silver glue-line, and the negative electrode slurry layer is correspondingly arranged with ipsilateral conductive silver glue-line.
The present invention is further improved, and the printing path is S-shaped, and each micro cell unit global shape is sigmoid curve
Close arrangement.
Compared with prior art, the beneficial effects of the present invention are: small, the high performance three-dimensional lithium that can produce outer dimension
Electronic cell, and the flexibility of battery is high, it is at low cost.
Detailed description of the invention
Fig. 1 is print member structural schematic diagram of the present invention；
Fig. 2 is one example structure schematic diagram of motion platform；
Fig. 3 is extrusion device structural schematic diagram；
Fig. 4 is spray nozzle fixture and coextrusion nozzle structure schematic diagram；
Fig. 5 is coextrusion spray head schematic diagram of internal structure；
Fig. 6 is the method for the present invention flow chart；
Fig. 7 is three-dimensional lithium ion battery partial schematic diagram；
Fig. 8 is from electrode material layer, conductive layer, tab and the mica sheet schematic cross-section in terms of Fig. 7 arrow direction.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawings and examples.
As Figure 1-Figure 5, the device of 3D printing three-dimensional lithium ion battery of the present invention includes that motion platform and setting are being transported
Print member 1 on moving platform, the print member 1 include the identical extrusion device 101 of 3 line structures and spray head clamping device
102, the extrusion device 1 includes for accommodating and squeezing out the extrusion of printing slurry, the driving extrusion extrusion slurry
Driving device, setting on the drive means, contact with contact, for controlling the sensor of extrusion extrusion slurry velocity；
Three runners being connected respectively with 3 extrusion delivery outlets are equipped in the coextrusion spray head 1028, in the bottom end of the runner
It is additionally provided with the coextrusion runner communicated respectively with three runners.
As shown in Fig. 2, as an embodiment of the present invention, the motion platform of this example includes the vertical of fixed print member
The Z axis that the control print member below Z axis platform 405 is moved along Z axis is arranged in the board mounting 404 and Z axis platform 405 of setting
Motion servo motor 406 controls X-axis motion servo motor 401, control print member that print member is moved along X-axis and transports along Y-axis
Dynamic Y-axis motion servo motor 402, and the control print member rotary shaft servo motor 403 that motor shaft rotates horizontally along longitudinal direction.
One shares 7 freedom degrees in this example integral mechanical structure, is controlled using motor.It is printed including control
3 component XYZ mobile freedom degrees, 3 extrusions of control carry out 3 freedom degrees of slurry extrusions on print member and control is beaten
Print 1 freedom degree of component rotation.
The Y-axis motion servo motor 402 of this example is equipped on X-axis motion servo motor 401, and rotary shaft servo motor 403 is taken
It is loaded in Y-axis motion servo motor 402, board mounting 404 is connect with rotary shaft servo motor 402, and Z axis platform 405 and Z axis move
Servo motor 406 connects.Wherein the board mounting 404 of print member 1 is attached with print member 1, and the placement of Z axis platform 405 is beaten
It is substrates printed.When carrying out 3D printing, the slurry to be printed first is added into needle tubing 1016 and is placed on print member 1, controls
XYZ axis motion servo motor determines printing path, controls the motor in print member 1 to control slurry extruded velocity, controls
The rotation of rotary shaft Serve Motor Control core component is thus to determine each slurry relative position.Pass through coextrusion formula 3D printing dress
Slurry needed for setting printing, makes a variety of slurries squeeze out integrated molding together.
One shares 3 freedom degrees on the print member of this example, controls 3 spray heads respectively and carries out slurry extrusion.Wherein use
Slurry to have preferably mobility and the viscosity of three kinds of slurries using needs reach unanimity.After being squeezed out due to spray head
Slurry expands line width with substrate extension, then requires to have stayed surplus when designing printing path.Using with good flexibility
With a thickness of 0.01mm mica sheet as printed substrates, can guarantee the insulation of battery while playing carrying printed material
Property.
As shown in figures 1 and 3, the driving device of this example is the vertically arranged lead screw motor 1011 of motor shaft, is passed through
Motor cabinet 1012 is fixed in device back plate 1021, and the lower section of the motor is equipped with the linear motion driven by lead screw motor 1011
Mechanism 1014, the straight-line motion mechanism 1014 are equipped with pressure sensor 1018, the pressure sensor 1018 and extrusion
Top connect.
Specifically, the extrusion of this example is needle tubing 1016, and the needle tubing 1016 of the extrusion device 101 passes through tracheae and spray head
The runner connection on coextrusion spray head 1028 on clamping device 102 squeezes out slurry to tracheae, by gas by extrusion device 101
The coextrusion spray head 1028 of pipe connection squeezes out slurry.Also, the push rod in needle tubing 1016 is arranged in the pressure sensor 1018
Top.
The straight-line motion mechanism includes the vertically arranged guide rail being connected with motor shaft, can be moved up and down on guide rail
Sliding block, the pressure sensor is arranged on the sliding block on push rod top of needle tubing, and the guide rail bottom is equipped with bearing block 1015,
The needle tubing 1016 is fixed in device back plate 1021 by T-type axle sleeve 1017.Screw rod stepper motor 1011 is by control card control
It is moved, and screw rod drives feed screw nut 1013 that the sliding block being mounted in linear guide is pushed to travel forward when the device is operated, by
Pressure sensor 1018 is fixed on sliding block in M3 milled screw 1019 and is moved downwardly together, pressure conduction to needle tubing 1016
Push rod on be extruded the slurry in needle tubing 1016.Wherein straight-line motion mechanism conducting pressure, the fixed screw rod of bearing block 1015,
T-type axle sleeve 1017 is used to needle tubing 1016 being fixed on device back plate 1021.
As shown in figure 3, a kind of coextrusion formula 3D printing device extrusion device part is by screw rod stepper motor, motor cabinet, silk
Stem nut, straight-line motion mechanism, bearing block, needle tubing, T-type axle sleeve, pressure sensor, M3 milled screw composition.Wherein fastener
It is not marked in figure.Screw rod stepper motor is by its movement of control card control, and screw rod drives feed screw nut to push when the device is operated
The sliding block being mounted in linear guide travels forward, since pressure sensor is fixed on sliding block downwardly together by M3 milled screw
Movement, pressure conduction to needle tubing are extruded the slurry in needle tubing.Wherein motor cabinet plays the role of fixed motor, linear motion
Transfer mechanism pressure, the fixed screw rod of bearing block, the fixed needle tubing of T-type axle sleeve.
As shown in figure 4, the spray head clamping device 102 includes being coextruded spray head 1028 and spray nozzle fixture 1029, it is described total
It squeezes out spray head 1028 to be arranged in the device back plate 1021 being connected with extrusion device 101 by spray nozzle fixture 1029, the dress of this example
It postpones plate and is equipped with the top fastening plates 1023 for being used for stationary nozzle fixture 1029, lower section fastening plates 1024, spray nozzle fixture 1029
It is fixed between top fastening plates 1023 and lower section fastening plates 1024 by M4 milled screw 1022, M5 milled screw 1025 will
Spray nozzle fixture 1029 is further positioned in the fastening plates 1024 of lower section.Briquetting 1027, spray head locating piece 1026 and M3 milled screw
Coextrusion spray head 1028 is positioned, makes to be coextruded the state that the holding of spray head 1028 is close to spray nozzle fixture 1029.
As shown in figure 5, the internal structure of this example coextrusion spray head 1028 is mainly by first runner 10281, second flow channel
10282, third flow channel 10283, coextrusion runner 10284 form, wherein in first runner 10281, second flow channel 10282, the
The top of three runners 10283 is separately connected a capillary 10286 and plays drainage.The coextrusion spray head 1028 is in indulging
Mandrel is symmetrical arranged, and second flow channel 10282 and the setting of coextrusion runner 10284 are on vertical central axis, 10281 He of first runner
Third flow channel 10283 is separately positioned on 10282 left and right sides of second flow channel, and converges with second flow channel 10282 in bottom end.It is described
It is coextruded 1028 bottom of spray head and is equipped with nozzle 10285, be symmetrically arranged two positioning right angles, institute in the two sides of nozzle 10285
It states and is symmetrically arranged two location holes on coextrusion spray head 1028, the spray nozzle fixture 1029 is equipped with and the cooperation of positioning right angle
Spray head locating piece 1026.Be additionally provided on the spray nozzle fixture 1029 with spray nozzle fixture 1029 it is hinged for fixing the co-extrusion
The briquetting 1027 of spray head 1028 out, the location hole 10287 can limit 1027 rotation position of briquetting.
1028 material of coextrusion spray head of this example is quartz.The first runner, second flow channel, third flow channel are wide depth one
The rectangular elongated slot for being 0.3mm is caused, the coextrusion runner is the rectangular elongated slot of width 0.6mm, depth 0.3mm.This example first passes through laser
The rectangular elongated slot and a width of processing the consistent 0.3mm of three wide depth are the rectangular flute length that 0.6mm depth is 0.3mm, then pass through bonding
Form blind hole.Converge into coextrusion runner finally by three fluid channels to complete to be coextruded.
As shown in fig. 6, the present invention is based on the printing equipments, before the printing, need to be arranged printing path and related ginseng
Number, such as flow velocity of each runner etc..After the setup, the print procedure of this example includes the following steps:
Step 301, configuration conductive silver glue and diaphragm slurry 2；
The conductive silver glue of this example is used in mixed way by epoxy resin, amine curing agent and flake silver powder with the ratio of 80:16:4.
Diaphragm slurry 2 is formed boron nitride powder, the Kynoar-hexafluoropropene, dimethylformamide of 1~10 μm of fine powder by grinding
With Isosorbide-5-Nitrae dioxane, wherein boron nitride powder and Kynoar-hexafluoropropene are formed with mass ratio for 6:1 or 5:1, diformazan
Base formamide and Isosorbide-5-Nitrae dioxane are formed with volume ratio 1:1, and for the viscosity for cooperating conductive silver glue, solid phase and liquid phase ratio be not low
In 6g:10ml.Slurry is uniformly mixed and is used suction filtration by mixing, vacuum stirring after agglutination body by heating, is filtered easily stifled
Fill in the bulky grain of spray head.Slurry viscosity is adjusted by the solid phase liquid content in slurry, and selects to stick by rheometer test
Both comparable material mixture ratios are spent to be printed.
Step 302, configuration anode and cathode slurry and diaphragm slurry 1；
Positive and negative pole material powder used in it and boron nitride powder carry out the fine powder that grinding forms 1~10 μm, to increase
Slurry is unlikely to block spray head when its mobility.Anode sizing agent by positive electrode powder, thickener, conductive agent, deionized water, 1,
4 dioxane composition, negative electrode material press one by negative electrode material powder, thickener, conductive agent, deionized water, Isosorbide-5-Nitrae dioxane
Determine mass fraction mixing composition.Wherein electrode material powder (positive electrode powder or negative electrode material powder) is 10%~40%
Mass percent, thickener are 2%~5% mass percent, and conductive agent is 2%~5% mass percent, and deionized water is
25%~40% mass percent, Isosorbide-5-Nitrae dioxane are 25%~40% mass percent.Diaphragm slurry 1 by boron nitride powder,
Kynoar-hexafluoropropene, dimethylformamide and Isosorbide-5-Nitrae dioxane are that 6:1 or 5:1 is formed with mass ratio, dimethyl methyl
Amide and Isosorbide-5-Nitrae dioxane are formed with volume ratio 1:1, and for the viscosity for cooperating positive and negative electrode slurry, solid phase and liquid phase ratio be not high
In 8g:10ml.Slurry is uniformly mixed and is used suction filtration by mixing, vacuum stirring to agglutination body by heating, filters easily blocking
The bulky grain of spray head.And these three comparable materials of viscosity are selected to be printed by rheometer test.
Diaphragm slurry 2 is added in the extrusion being connected with intermediate runner step 303, and conductive silver glue is added and two
In the connected needle tubing of side runner, in the printing for carrying out conductive layer on mica sheet, under conditions of low temperature -10~-20 degree Celsius into
Row printing；
Tab is placed in corresponding position by step 304, coats conductive silver glue in corresponding installation site where tab, later
Tab is disposed above it and is burn-on；
Diaphragm slurry 1 is added in the extrusion being connected with intermediate runner step 305, anode sizing agent and cathode slurry
Material is separately added into the needle tubing being connected with two side runners, Celsius in low temperature -10~-20 in progress material layer printing on conductive layer
It carries out printing the liquid phase curing molding made in slurry under conditions of degree；
Step 306 is dried after being freeze-dried to battery, and it is dry that the three-dimensional lithium ion battery that printing is completed is placed in freezing
In dry machine, cured organic solvent and the deionized water removal that will be distributed in electrode slice manufacture porous electrode and diaphragm, hole
Gap helps being filled with for electrolyte.Drying is carried out again accelerates conductive silver glue solidification；
Step 307 carries out soft-package battery encapsulation, and the three-dimensional lithium ion battery printed is used to the encapsulation work of soft-package battery
The manufacture of three-dimensional lithium battery is completed in skill encapsulation.
In general, the present invention prints three-dimensional batteries and is largely divided into two steps, and the first step is the printing of conductive layer, is printed
Conductive layer be used to make to manufacture instead of traditional collector, more flexible, second step is the printing of material layer, passes through 3D printing
The lithium battery of electrode material manufacture labyrinth.But due to during using coextrusion mode extruded material, if print path
Diameter has bending rear path to have certain angle when designing when, coextrusion spray head 1028 need to carry out the rotation of respective angles to squeeze out
Slurry leads to short circuit so as not to intersect.Therefore the coextrusion needs of spray head 1028 are rotated along the path of design, are rotated
It is realized by the rotary shaft servo motor 403 on movement mechanism, to avoid slurry cross-superimposed.In the printing for carrying out conductive layer
When, conductive silver glue is placed in the needle tubing on both sides, carries out coextrusion printing after diaphragm slurry 2 being placed in intermediate needle tubing.Its
In print on the conductive silver glue on both sides and serve as collector and diaphragm slurry 2 separates positive and negative anodes, so that the battery is unlikely to short circuit.It carries out
When the printing of material layer, anode and cathode slurry is placed in the needle tubing on both sides, diaphragm slurry 1 is placed in intermediate needle tubing, printing
Material is placed on conductive layer, and anode and cathode slurry is sequentially placed on two non-interference conductive silver tree laces and forms positive and negative anodes, every
Film slurry 1 is placed on diaphragm slurry 2 and serves as insulating layer.Simultaneously pressure welding is conductive with corresponding positive and negative anodes by conductive silver glue bonding for tremella
Elargol line is connected, and is respectively served as positive and negative lead wires.
As shown in Figure 7 and Figure 8, the three-dimensional lithium ion battery 2 that the present invention is printed using Method of printing of the present invention, including insulation
Mica sheet 201, the printing battery being arranged on mica sheet 201, by conductive silver glue with the pole that is connected of printing battery the two poles of the earth
Ear 204, wherein the printing battery includes several concatenated micro cell unit, wherein the micro cell unit includes leading
Electric layer 203 and the material layer 202 that 203 top of conductive layer is arranged in, the conductive layer 203 include that the second intermediate diaphragm is arranged in
Pulp layer 2031 and the conductive silver glue-line 2032 that 2031 two sides of the second diaphragm pulp layer are arranged in, the material layer 202 include setting
Set in the first intermediate diaphragm pulp layer 2022 and be arranged in 2021 He of anode sizing agent layer of 2022 two sides of the first diaphragm pulp layer
Negative electrode slurry layer 2023, wherein the first diaphragm pulp layer 2022 and the second diaphragm pulp layer 2031 are correspondingly arranged, described
Anode sizing agent layer 2021 is correspondingly arranged with ipsilateral conductive silver glue-line 2032, the negative electrode slurry layer 2023 and ipsilateral conduction
Elargol layer 2032 is correspondingly arranged.It can be seen that the printing path of micro cell unit is set as S-shaped, each micro cell unit entirety shape
Shape is that sigmoid curve is closely arranged, and can make full use of space in this way, same material may be crowded together in print procedure but this
Also it will not influence the molding of final battery, and distributed printed design can increase the flexibility of battery, bend after encapsulation
It not will lead to fracture failure.And each micro cell is connected by concatenated mode to reach the mesh for obtaining a high-capacity battery
's.
It is played as shown in figure 8, the tab 204 of one end is connect by one layer of conductive silver glue 2033 with positive and negative anodes conductive silver tree lace
Conductive effect.
The specific embodiment of the above is better embodiment of the invention, is not limited with this of the invention specific
Practical range, the scope of the present invention includes being not limited to present embodiment, all equal according to equivalence changes made by the present invention
Within the scope of the present invention.
Claims (10)
- The device of 1.3D printing three-dimensional lithium ion battery, it is characterised in that: on the moving platform including motion platform and setting Print member, the print member include the identical extrusion device of 3 line structures and with the co-extrusion that is connected respectively with 3 extrusion devices Spray head out, the extrusion device include for accommodating and squeezing out the extrusion of printing slurry, the driving extrusion extrusion slurry The driving device of material, setting contact on the drive means, with contact, and the sensing of slurry velocity is squeezed out for controlling extrusion Device；Three runners being connected respectively with 3 extrusion delivery outlets are equipped in the coextrusion spray head, the bottom end of the runner also Equipped with the coextrusion runner communicated respectively with three runners.
- 2. the apparatus according to claim 1, it is characterised in that: the motion platform include fixed print member pedestal, The platform of lithium ion battery substrate is placed, X-axis motion servo motor, control pedestal that pedestal is moved along X-axis is controlled and is moved along Y-axis Y-axis motion servo motor, the Z axis motion servo motor that moves along Z axis of control platform and control pedestal central axis water along longitudinal direction The rotary shaft servo motor of flat rotation.
- 3. device according to claim 1 or 2, it is characterised in that: the driving device is the vertically arranged electricity of motor shaft Machine, the bottom of the motor are equipped with the straight-line motion mechanism being driven by motor, and the straight-line motion mechanism is equipped with pressure sensing Connect at the top of device, the pressure sensor and extrusion.
- 4. device according to claim 3, it is characterised in that: the extrusion is needle tubing, the straight-line motion mechanism packet Include vertically arranged guide rail on a mounting board, sliding block being connected with motor shaft, can moving up and down on guide rail, the pressure Sensor is arranged on the sliding block on push rod top of needle tubing, and the guide rail bottom is equipped with bearing block, and the needle tubing is solid by axle sleeve Determine on a mounting board.
- 5. device according to claim 1 or 2, it is characterised in that: the coextrusion spray head is arranged by spray nozzle fixture In the device back plate being connected with extrusion device, setting substantially symmetrical about its central axis, second flow channel and coextrusion are indulged in the coextrusion spray head edge Runner setting is on vertical central axis, and first runner and third flow channel are separately positioned at left and right sides of second flow channel, and and second Road converges in bottom end, first runner, second flow channel, third flow channel top be respectively equipped with capillary, on the coextrusion spray head Equipped with location structure, the spray nozzle fixture is equipped with the locating piece and fixing piece cooperated with location structure.
- 6. device according to claim 5, it is characterised in that: the coextrusion spray head is equipped with positioning right angle and positioning Hole, the spray nozzle fixture and positioning right angle corresponding position are equipped with spray head locating piece, are additionally provided on the spray nozzle fixture and spray nozzle fixture The hinged briquetting for being used to fix the coextrusion spray head, the location hole can limit briquetting rotation position.
- 7. device according to claim 5, it is characterised in that: the first runner, second flow channel, third flow channel are wide deep Consistent is the rectangular elongated slot of 0.3mm, and the coextrusion runner is the rectangular elongated slot of width 0.6mm, depth 0.3mm.
- 8. a kind of Method of printing based on device described in any one of claims 1-6, it is characterised in that include the following steps:S1: configuration conductive silver glue and diaphragm slurry 2, configuration anode and cathode slurry and diaphragm slurry 1；S2: setting printing path and print parameters；S3: diaphragm slurry 2 is added in the extrusion being connected with intermediate runner, and conductive silver glue addition is connected with two side runners Extrusion in, on mica sheet carry out conductive layer printing, wherein print temperature be -10~-20 degrees Celsius；S4: tab is placed in corresponding position；S5: diaphragm slurry 1 is added in the extrusion being connected with intermediate runner, anode sizing agent and negative electrode slurry are separately added into In the extrusion being connected with two side runners, in progress material layer printing on conductive layer, wherein print temperature is -10~-20 Celsius Degree；S6: it is dried after being freeze-dried to battery；S7: soft-package battery encapsulation is carried out to the battery after drying.
- 9. the three-dimensional lithium ion battery of Method of printing printing according to claim 8, it is characterised in that: the base including insulation Plate, the printing battery being disposed on the substrate, the tab being connected by conductive silver glue with printing battery the two poles of the earth, wherein described to beat Printed battery includes 1 or more concatenated micro cell unit, wherein the micro cell unit includes conductive layer and is arranged in conduction The material layer of layer top, the conductive layer include that the second intermediate diaphragm pulp layer is arranged in and is arranged in the second diaphragm pulp layer The conductive silver glue-line of two sides, the material layer include that the first intermediate diaphragm pulp layer is arranged in and is arranged in the first diaphragm slurry The anode sizing agent layer and negative electrode slurry layer of layer two sides, wherein the first diaphragm pulp layer and the second diaphragm pulp layer correspondence are set It sets, the anode sizing agent layer is correspondingly arranged with ipsilateral conductive silver glue-line, the negative electrode slurry layer and ipsilateral conductive silver glue-line It is correspondingly arranged.
- 10. three-dimensional lithium ion battery according to claim 9, it is characterised in that: the printing path is S-shaped, Mei Gewei Battery unit global shape is that sigmoid curve is closely arranged.
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| WO2024012287A1 (en) * | 2022-07-13 | 2024-01-18 | 深圳市创想三维科技股份有限公司 | Switching device and 3d printing apparatus |
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