Method for integrating lithium ion battery based on ceramic packaging structure

Abstract

The invention relates to the field of integrated lithium ion batteries based on a ceramic packaging technology, in particular to a method for preparing an integrated lithium ion battery based on a ceramic packaging structure, which comprises the following steps of: respectively sintering a Ni layer and preparing a porous Cu layer on the surface of an aluminum oxide substrate to respectively serve as a positive current collector and a negative current collector of the lithium ion battery. And coating the surfaces of the Ni layer and the Cu layer with positive and negative active material slurry through screen printing, and drying and curing. And via hole electrical interconnection is carried out on the tube shell layer, and double-sided via hole-electrical interconnection of the aluminum oxide substrate is realized by using Cu-Sn-Ti slurry after copper column hole filling. And after the diaphragm is filled, vacuum sealing and electric interconnection of the positive electrode substrate, the tube shell layer and the negative electrode substrate are realized by using ultra-vacuum sealant and Sn-Bi soldering paste. And then a LiPF6 electrolyte is used for liquid injection at the reserved micropores. And finally, sealing holes to obtain the integrated lithium ion battery based on the ceramic packaging structure, which is adjustable in voltage-capacity and high in reliability.

Description

Technical Field

[0001] The present invention belongs to the technical field of the encapsulation of integrated lithium-ion batteries. Specifically, it relates to a method for an integrated lithium-ion battery based on a ceramic encapsulation structure. Background Art

[0002] With the increasing demand for portable electronic products, the demand for micro-batteries is continuously increasing, and it is required to design micro-batteries with matching sizes and performances. Although traditional encapsulated lithium-ion batteries have a high energy density, their safety and reliability are poor, and there are also bottlenecks in the heat dissipation of the batteries. Lithium-ion batteries with ceramic encapsulation provide a new solution, which has high reliability and heat dissipation ability and can be used in microcontrollers, sensors, portable LED arrays, etc. In addition, how to integrate the batteries while miniaturizing them is a major challenge that must be concerned about. Integrated micro-batteries integrate micro-battery units in series and parallel on a 0.5-mm-thick substrate according to actual needs, and can provide high-voltage and high-capacity energy supply within a small footprint, providing strong support for the development of portable electronic products.

[0003] In summary, it is imperative to find a more reliable, portable, low-cost and voltage-capacity adjustable method for integrated lithium-ion batteries. Based on this, the present invention proposes a method for preparing an integrated lithium-ion battery based on ceramic encapsulation to solve the above problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is aimed at the defects in the background art. For example, the present invention proposes a method for preparing an integrated lithium-ion battery based on ceramic encapsulation, which uses a ceramic shell with a metallization layer to replace the PEI film and other encapsulation materials, and can prepare an integrated lithium-ion battery with adjustable voltage-capacity in a convenient, reliable and small-footprint manner.

[0005] The present invention adopts the following technical solutions to solve the above technical problems: A method for an integrated lithium-ion battery based on a ceramic encapsulation structure, the method comprising: Preparation of a positive current collector: Printing nickel paste on the surface of an alumina ceramic substrate by screen printing and vacuum sintering it to be used as the positive current collector; Preparation of a negative current collector: Printing cupric oxide paste on the surface of an alumina ceramic substrate by screen printing and sintering-reducing it to be used as the negative current collector; Through-hole electrical interconnection of the ceramic substrate: Welding copper posts at the through-holes of the alumina ceramic substrate using copper-tin-titanium paste to achieve electrical interconnection between the upper and lower surfaces of the alumina ceramic substrate; Properly cleaning the metallized positive electrode, negative electrode and the ceramic substrate of the shell layer with alcohol; Preparation of the positive electrode active material: The positive electrode slurry is coated on the surface of the nickel paste layer of the positive electrode current collector through a steel plate mask. Preparation of the negative electrode active material: The negative electrode slurry is coated on the surface of the copper layer of the negative electrode current collector through a steel plate mask. Integrated battery packaging: Place the separator in the shell, apply the ultra-high vacuum sealant Torr Seal on the shell wall, apply the Sn-Bi solder paste on the pads on both sides of the shell, inject the electrolyte LiPF6 after curing, and obtain an integrated lithium-ion battery pack after encapsulation.

[0006] Furthermore, the positive electrode slurry uses lithium iron phosphate LFP as the active material, conductive carbon black as the conductive agent, polytetrafluoroethylene PVDF as the binder, and N-methylpyrrolidone NMP as the solvent.

[0007] As a preferred embodiment of the present application, the mass percentages of the active material, conductive agent, and binder in the positive electrode slurry are 8:1:1.

[0008] Furthermore, the negative electrode slurry uses graphite as the active material, conductive carbon black as the conductive agent, polytetrafluoroethylene PVDF as the binder, and N-methylpyrrolidone NMP as the solvent.

[0009] As a preferred embodiment of the present application, the mass percentages of the active material, conductive agent, and binder in the negative electrode slurry are 7:2:1.

[0010] As a preferred embodiment of the present application, in the step of preparing the positive electrode current collector, the nickel paste is obtained by uniformly mixing 500 nm nickel powder, CMBS glass powder, and an organic carrier; the nickel paste is printed on the surface of the ceramic plate by screen printing and the positive electrode current collector is obtained after vacuum sintering.

[0011] As a preferred embodiment of the present application, in the step of preparing the positive electrode active material, the porous copper layer is obtained by uniformly mixing copper oxide powder and an organic carrier; the copper oxide slurry is printed on the surface of the ceramic plate by screen printing and the negative electrode current collector is obtained after air sintering and reduction.

[0012] As a preferred embodiment of the present application, in the step of preparing the positive electrode current collector, a slurry is obtained by uniformly mixing Cu-Sn-Ti paste and an organic carrier; after filling copper columns at the ceramic through-holes, the Cu-Sn-Ti paste is printed on both sides of the through-holes by screen printing and the via interconnection layer of the ceramic substrate is obtained after vacuum sintering.

[0013] As a preferred embodiment of the present application, in the step of preparing the positive electrode active material, the positive electrode slurry is printed on the surface of the positive electrode current collector by coating and the positive electrode structure is obtained after vacuum drying at 120 °C.

[0014] As a preferred embodiment of the present application, in the step of preparing the negative electrode active material, the negative electrode slurry is printed on the surface of the negative electrode current collector by coating, and the negative electrode structure is obtained after vacuum drying at 105°C.

[0015] Compared with the prior art, the present invention adopts the above technical solutions and has the following beneficial effects: 1. A method for preparing an integrated lithium-ion battery based on ceramic packaging provided by the present invention realizes the integration between micro lithium-ion battery units through ceramic packaging, realizes the integration of multiple battery units with a small floor area, reduces the packaging volume, and is a more integrated and miniaturized battery preparation method.

[0016] 2. A method for preparing positive and negative current collectors by ceramic metallization provided by the present invention can realize the integration of different sizes, intervals, and quantities within a specified area. Compared with traditional integration methods, it has high processing accuracy and strong designability.

[0017] 3. A method for preparing an integrated lithium-ion battery based on ceramic packaging provided by the present invention can realize the series-parallel integration of battery array units through circuit design to obtain different voltage-capacity combinations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the ceramic substrate of the positive and negative current collectors and the interconnection layer with the package shell of the present invention; Figure 2 Schematic diagram of the battery packaging solution and the test fixture of the present invention; Figure 3 Charge and discharge curve diagram of the integrated battery of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0021] The present invention discloses a method for an integrated lithium-ion battery based on a ceramic package structure, comprising the following steps: Step 1: Use laser cutting to perform array drilling on corresponding positions of a ceramic plate; Step 2: Degrease the laser-treated ceramic plate; Step 3: Metallize the positive electrode ceramic substrate with the nickel paste provided by the present invention as the positive electrode current collector; Step 4: Metallize the negative electrode ceramic substrate with the porous copper paste provided by the present invention as the negative electrode current collector; Step 5: Metallize the through holes of the shell layer with the Cu-Sn-Ti paste provided by the present invention as the electrical interconnection material between the positive and negative electrodes; Step 6: Appropriately clean the metallized ceramic plate with alcohol; Step 7: Use the lithium iron phosphate slurry provided by the present invention to coat the positive electrode slurry on the surface of the positive electrode current collector nickel paste layer through a steel plate mask as the active material in the positive electrode structure; Step 8: Use the graphite slurry provided by the present invention to coat the negative electrode slurry on the surface of the negative electrode current collector porous copper layer through a steel plate mask as the active material in the negative electrode structure; Step 9: Apply ultra-vacuum sealant Torr Seal to the shell wall, and apply Sn-Bi solder paste to the solder pads on both sides of the shell. After curing, inject electrolyte LiPF6 and perform encapsulation to obtain an integrated lithium-ion battery pack.

[0022] In Step 1, the designed battery cell array is laser cut on the surface of the ceramic plate by a laser, with a dimensional accuracy of ±0.05 mm and a position accuracy of ±0.05 mm.

[0023] In Step 2, the degreasing solution formula is 30 g / L sodium hydroxide, 10 g / L sodium carbonate, the temperature is 60 °C, and the treatment time is 10 min.

[0024] In Step 3, the nickel paste sintering method is as follows: Place the ceramic sheet printed with nickel paste in an oven at 80 °C for 30 min to dry the organic carrier. Then, place the ceramic sheet in a vacuum furnace, degrease at 500 °C for 1 h, sinter at 1100 °C for 30 min, and cool to obtain the positive electrode current collector array.

[0025] In Step 4, the preparation method of the porous copper is as follows: Place the ceramic sheet printed with copper oxide in an oven at 80 °C for 30 min to dry the organic carrier. Then, place the ceramic sheet in a muffle furnace, degrease at 500 °C for 1 h, sinter at 1050 °C for 30 min, reduce at 800 °C for 1 h, and cool to obtain the negative electrode current collector array.

[0026] In Step 5, the preparation method of the Cu-Sn-Ti layer is as follows: Place the ceramic sheet printed with Cu-Sn-Ti in an oven at 80 °C for 30 min to dry the organic carrier. Then, place the ceramic sheet in a vacuum furnace and sinter it at 950 °C for 15 min. After cooling, the shell interconnect layer is obtained.

[0027] In Step 6, alcohol rinsing is required for the cleaning step.

[0028] In Step 7, the positive electrode paste formulation uses lithium iron phosphate LFP as the active material, conductive carbon black as the conductive agent, polytetrafluoroethylene PVDF as the binder, and N-methyl-2-pyrrolidone NMP as the solvent. Among them, the mass percentage of the active material: conductive agent: binder is 8:1:1.

[0029] In Step 8, the negative electrode paste formulation uses graphite as the active material, conductive carbon black as the conductive agent, polytetrafluoroethylene PVDF as the binder, and N-methyl-2-pyrrolidone NMP as the solvent. Among them, the mass percentage of the active material: conductive agent: binder is 7:2:1.

[0030] In Step 9, the curing temperature of the ultra-high vacuum sealant Torr Seal is 2 h at 60 °C or 24 h at room temperature, and the soldering temperature of the Sn-Bi solder paste is 180 °C.

[0031] The battery preparation scheme of this application realizes the series and parallel integration between the positive and negative electrodes of multi-unit lithium-ion batteries through the via-hole - electrical interconnection method, and realizes a diversified capacity-voltage adjustable micro battery pack under more reliable and stable conditions, achieving a stable energy supply.

[0032] Example 1:

[0033] (1) Preparation step: Prepare several alumina ceramic substrates with dimensions of 45×45×0.5 mm, ultrasonically clean them in alcohol for 3 min, and prepare the patterns to be laser-cut. The size of each battery unit is 5×5 mm, the interval is 2 mm, and the number of arrays is 4×4.

[0034] (2) Laser cutting: Import the metallized pattern to be cut into the laser control software, and use the laser to cut the through-holes of each battery array.

[0035] (3) Preparation of the positive electrode current collector: Prepare a nickel paste with a formulation of 10 g of nickel powder, 1 g of CMBS glass powder, and 2 g of organic carrier, and process the paste using a three-roll mill. Place the ceramic sheet printed with the nickel paste in an oven at 80 °C for 30 min to dry the organic carrier. Then, place the ceramic sheet in a vacuum furnace, degrease it at 500 °C for 1 h, sinter it at 1100 °C for 30 min, and after cooling, obtain the positive electrode current collector array.

[0036] (4)Preparation of the negative current collector: Prepare cupric oxide paste with a formulation of 10 g of cupric oxide powder and 1 g of organic carrier, and process the paste using a three-roll mill. Place the ceramic sheet printed with cupric oxide in an oven at 80 °C for 30 min to dry the organic carrier. Then, place the ceramic sheet in a muffle furnace, degrease it at 500 °C for 1 h, sinter it at 1050 °C for 30 min, reduce it at 800 °C for 1 h, and cool it to obtain an array of negative current collectors.

[0037] (5)Preparation of the via interconnection layer: Prepare Cu-Sn-Ti paste with a formulation of 10 g of Cu-Sn-Ti powder and 1 g of organic carrier, and process the paste using a three-roll mill. Place the ceramic sheet printed with Cu-Sn-Ti in an oven at 80 °C for 30 min to dry the organic carrier. Then, place the ceramic sheet in a vacuum furnace, sinter it at 950 °C for 15 min, and cool it to obtain a shell interconnection layer.

[0038] (6)Preparation of the positive electrode structure: Prepare positive electrode paste with a formulation using lithium iron phosphate (LFP) as the active material, conductive carbon black as the conductive agent, polytetrafluoroethylene (PVDF) as the binder, and N-methylpyrrolidone (NMP) as the solvent. Among them, the mass percentage of the active material: conductive agent: binder is 8:1:1. Coat the lithium iron phosphate paste on the surface of the positive current collector, place it in an oven at 120 °C for 12 h to dry the solvent.

[0039] (7)Preparation of the negative electrode structure: Prepare negative electrode paste with a formulation using graphite as the active material, conductive carbon black as the conductive agent, polytetrafluoroethylene (PVDF) as the binder, and N-methylpyrrolidone (NMP) as the solvent. Among them, the mass percentage of the active material: conductive agent: binder is 7:2:1. Coat the graphite paste on the surface of the negative current collector, place it in an oven at 120 °C for 12 h to dry the solvent.

[0040] (6)Integrated packaging: Coat the walls of the shells of each battery cell with ultra-high vacuum sealant (Torr Seal), and coat the solder pads of each layer of current collectors with Sn-Bi solder paste. Place it in an oven for 2 h to achieve vacuum sealing of each battery cell. Then, heat it on a heating stage to 180 °C to achieve electrical interconnection between layers, and a 4×4 array of integrated batteries with a unit size of 5×5 mm can be obtained.

[0041] Example 2:

[0042] (1)Preliminary steps: Prepare several alumina ceramic substrates with dimensions of 45×45×0.5 mm, ultrasonically clean them in alcohol for 3 min, and prepare the patterns to be laser-cut. The size of each battery cell is 3×3 mm, the spacing is 2 mm, and the number of arrays is 4×4.

[0043] (2) Laser cutting: Import the metallized pattern to be cut into the laser control software, and use the laser to cut through holes in each battery array.

[0044] (3) Preparation of the positive current collector: Prepare nickel paste with a formulation of 10 g of nickel powder, 1 g of CMBS glass powder, and 2 g of organic carrier, and process the paste using a three-roll mill. Place the ceramic sheet printed with nickel paste in an oven at 80 °C for 30 min to dry the organic carrier. Then, place the ceramic sheet in a vacuum furnace, degrease it at 500 °C for 1 h, sinter it at 1100 °C for 30 min, and cool it to obtain an array of positive current collectors.

[0045] (4) Preparation of the negative current collector: Prepare copper oxide paste with a formulation of 10 g of copper oxide powder and 1 g of organic carrier, and process the paste using a three-roll mill. Place the ceramic sheet printed with copper oxide in an oven at 80 °C for 30 min to dry the organic carrier. Then, place the ceramic sheet in a muffle furnace, degrease it at 500 °C for 1 h, sinter it at 1050 °C for 30 min, reduce it at 800 °C for 1 h, and cool it to obtain an array of negative current collectors.

[0046] (5) Preparation of the via interconnect layer: Prepare Cu-Sn-Ti paste with a formulation of 10 g of Cu-Sn-Ti powder and 1 g of organic carrier, and process the paste using a three-roll mill. Place the ceramic sheet printed with Cu-Sn-Ti in an oven at 80 °C for 30 min to dry the organic carrier. Then, place the ceramic sheet in a vacuum furnace, sinter it at 950 °C for 15 min, and cool it to obtain a package interconnect layer.

[0047] (6) Preparation of the positive electrode structure: Prepare positive electrode paste with a formulation using lithium iron phosphate (LFP) as the active material, conductive carbon black as the conductive agent, polytetrafluoroethylene (PVDF) as the binder, and N-methylpyrrolidone (NMP) as the solvent. Among them, the mass percentage of the active material: conductive agent: binder is 8:1:1. Coat the lithium iron phosphate paste on the surface of the positive current collector, place it in an oven at 120 °C for 12 h to dry the solvent.

[0048] (7) Preparation of the negative electrode structure: Prepare negative electrode paste with a formulation using graphite as the active material, conductive carbon black as the conductive agent, polytetrafluoroethylene (PVDF) as the binder, and N-methylpyrrolidone (NMP) as the solvent. Among them, the mass percentage of the active material: conductive agent: binder is 7:2:1. Coat the graphite paste on the surface of the negative current collector, place it in an oven at 120 °C for 12 h to dry the solvent.

[0049] (6) Integrated packaging: Apply ultra-high vacuum sealant (Torr Seal) to the walls of the tube shells of each battery cell, and apply Sn-Bi solder paste to the pads of each layer of current collectors. Place it in an oven for 2 h to achieve vacuum sealing of each battery cell. Then, heat it on a heating table to 180 °C to achieve electrical interconnection between layers, and an integrated battery with a 4×4 array and a unit size of 3×3 mm can be obtained.

[0050] Example 3:

[0051] (1) Preparation step: Prepare several alumina ceramic substrates with a size of 45×45×0.5 mm, ultrasonically clean them in alcohol for 3 min, prepare the patterns to be laser-cut, the size of each battery cell is 3×3 mm, the interval is 2 mm, and the number of arrays is 10×10.

[0052] (2) Laser cutting: Import the metallized pattern to be cut into the laser control software, and use the laser to cut the through-holes of each battery array.

[0053] (3) Preparation of the positive current collector: Prepare nickel paste with a formula of 10 g of nickel powder, 1 g of CMBS glass powder, and 2 g of organic carrier, and process the paste with a three-roll mill. Place the ceramic sheet printed with nickel paste in an oven at 80 °C for 30 min to dry the organic carrier. Then, place the ceramic sheet in a vacuum furnace, degrease it at 500 °C for 1 h, sinter it at 1100 °C for 30 min, and cool to obtain a positive current collector array.

[0054] (4) Preparation of the negative current collector: Prepare copper oxide paste with a formula of 10 g of copper oxide powder and 1 g of organic carrier, and process the paste with a three-roll mill. Place the ceramic sheet printed with copper oxide in an oven at 80 °C for 30 min to dry the organic carrier. Then, place the ceramic sheet in a muffle furnace, degrease it at 500 °C for 1 h, sinter it at 1050 °C for 30 min, reduce it at 800 °C for 1 h, and cool to obtain a negative current collector array.

[0055] (5) Preparation of the via interconnection layer: Prepare Cu-Sn-Ti paste with a formula of 10 g of Cu-Sn-Ti powder and 1 g of organic carrier, and process the paste with a three-roll mill. Place the ceramic sheet printed with Cu-Sn-Ti in an oven at 80 °C for 30 min to dry the organic carrier. Then, place the ceramic sheet in a vacuum furnace, sinter it at 950 °C for 15 min, and cool to obtain a tube shell interconnection layer.

[0056] Preparation of the positive electrode structure: Prepare the positive electrode slurry with a formulation using lithium iron phosphate (LFP) as the active material, conductive carbon black as the conductive agent, polytetrafluoroethylene (PVDF) as the binder, and N-methyl-2-pyrrolidone (NMP) as the solvent. Among them, the mass percentage of the active material: conductive agent: binder is 8:1:1. Coat the lithium iron phosphate slurry on the surface of the positive current collector and place it in an oven at 120 °C for 12 h to dry the solvent.

[0057] (7)Preparation of the negative electrode structure: Prepare the negative electrode slurry with a formulation using graphite as the active material, conductive carbon black as the conductive agent, polytetrafluoroethylene (PVDF) as the binder, and N-methyl-2-pyrrolidone (NMP) as the solvent. Among them, the mass percentage of the active material: conductive agent: binder is 7:2:1. Coat the graphite slurry on the surface of the negative current collector and place it in an oven at 120 °C for 12 h to dry the solvent.

[0058] (6)Integrated encapsulation: Coat the ultra-high vacuum sealant (Torr Seal) on the wall of the shell of each battery cell, and coat the Sn-Bi solder paste at the pad of each layer of current collector. Place it in an oven for 2 h to achieve the vacuum sealing of each battery cell. Then, heat it on a hot plate to 180 °C to achieve the electrical interconnection between layers, and an integrated battery with a 10×10 array and a unit size of 3×3 mm can be obtained.

[0059] Performance test: Perform charge and discharge tests on the integrated battery samples prepared in the above examples, and the test instrument is a battery tester produced by Shenzhen Neware Electronics Co., Ltd.

[0060] From Figure 3 It can be seen that the discharge capacity of the battery cell is 120 mAh / g, meeting the usage requirements.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for an integrated lithium-ion battery based on a ceramic packaging structure, characterized in that, The method includes: Preparation of the positive current collector: Nickel paste is printed on the surface of an alumina ceramic substrate by screen printing and then vacuum sintered to serve as the positive current collector. Preparation of the negative current collector: Copper oxide paste is printed on the surface of an alumina ceramic substrate by screen printing and then sintered and reduced to serve as the negative current collector. Through-hole electrical interconnection of the ceramic substrate: Copper columns are welded to the through-holes of the alumina ceramic substrate using copper-tin-titanium paste to achieve electrical interconnection between the upper and lower surfaces of the alumina ceramic substrate. Preparation of the positive active material: The positive paste is coated on the surface of the nickel paste layer of the positive current collector through a steel plate mask. Preparation of the negative active material: The negative paste is coated on the surface of the copper layer of the negative current collector through a steel plate mask. Integrated battery packaging: The separator is placed inside the shell, ultra-vacuum sealant Torr Seal is applied to the shell wall, Sn-Bi solder paste is applied to the solder pads on both sides of the shell, electrolyte LiPF6 is injected after curing, and an integrated lithium-ion battery pack is obtained after encapsulation.

2. A method for an integrated lithium-ion battery based on a ceramic package structure according to claim 1, characterized in that, The positive paste uses lithium iron phosphate LFP as the active material, conductive carbon black as the conductive agent, polytetrafluoroethylene PVDF as the binder, and N-methylpyrrolidone NMP as the solvent.

3. A method for an integrated lithium-ion battery based on a ceramic packaging structure according to claim 2, characterized in that The mass percentages of the active material, conductive agent, and binder in the positive paste are 8:1:

1.

4. A method for an integrated lithium-ion battery based on a ceramic package structure according to claim 1, characterized in that, The negative paste uses graphite as the active material, conductive carbon black as the conductive agent, polytetrafluoroethylene PVDF as the binder, and N-methylpyrrolidone NMP as the solvent.

5. A method for an integrated lithium-ion battery based on a ceramic package structure according to claim 4, characterized in that, The mass percentages of the active material, conductive agent, and binder in the negative paste are 7:2:

1.

6. A method for an integrated lithium-ion battery based on a ceramic package structure according to claim 1, characterized in that, In the step of preparing the positive current collector, the nickel paste is obtained by uniformly mixing 500 nm nickel powder, CMBS glass powder, and an organic carrier; the nickel paste is printed on the surface of the ceramic plate by screen printing and the positive current collector is obtained after vacuum sintering.

7. A method for an integrated lithium-ion battery based on a ceramic package structure according to claim 1, characterized in that, In the step of preparing the positive active material, the porous copper layer is obtained by uniformly mixing copper oxide powder and an organic carrier; the copper oxide paste is printed on the surface of the ceramic plate by screen printing and the negative current collector is obtained after air sintering and reduction.

8. A method for an integrated lithium-ion battery based on a ceramic packaging structure according to claim 1, characterized in that, In the step of preparing the positive current collector, the paste is obtained by uniformly mixing Cu-Sn-Ti paste and an organic carrier; after filling copper columns at the ceramic through-holes, the Cu-Sn-Ti paste is printed on both sides of the through-holes by screen printing and the through-hole interconnection layer of the ceramic substrate is obtained after vacuum sintering.

9. A method for an integrated lithium-ion battery based on a ceramic packaging structure according to claim 1, wherein, In the step of preparing the positive active material, the positive paste is printed on the surface of the positive current collector by coating and the positive structure is obtained after vacuum drying at 120 °C.

10. A method for an integrated lithium-ion battery based on a ceramic package structure according to claim 1, characterized in that, In the step of preparing the negative active material, the negative paste is printed on the surface of the negative current collector by coating and the negative structure is obtained after vacuum drying at 105 °C.

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