CN113923858B - Circuit substrate for new energy automobile and preparation method thereof - Google Patents

Circuit substrate for new energy automobile and preparation method thereof Download PDF

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Publication number
CN113923858B
CN113923858B CN202111336947.6A CN202111336947A CN113923858B CN 113923858 B CN113923858 B CN 113923858B CN 202111336947 A CN202111336947 A CN 202111336947A CN 113923858 B CN113923858 B CN 113923858B
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pipeline
plate
sliding
wall
fixedly connected
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CN113923858A (en
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张富启
王海军
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Zhuhai Yueke Jinghua Technology Co ltd
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Zhuhai Yueke Jinghua Technology Co ltd
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/03—Use of materials for the substrate
    • H05K1/0306—Inorganic insulating substrates, e.g. ceramic, glass
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/581—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on aluminium nitride
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
    • C04B2235/3873—Silicon nitrides, e.g. silicon carbonitride, silicon oxynitride
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)

Abstract

The invention provides a circuit substrate for a new energy automobile and a preparation method thereof, wherein the preparation method comprises the following steps: the circuit board comprises a circuit board body, wherein the circuit board body is prepared by uniformly mixing powder, a composite sintering aid, a dispersing agent, a plasticizer and a binder, and the powder is prepared from the following components in percentage by mass: 70-95% of aluminum nitride and 5-30% of silicon nitride. The linear expansion coefficient of the circuit substrate body is close to that of the silicon chip, so that the problem that the chip on the circuit substrate cracks in the using process can be avoided, and meanwhile, the circuit substrate is high in heat conductivity and capable of dissipating heat quickly, the service lives of the chip and the circuit substrate are prolonged, the stability of the circuit substrate is improved, and the production cost is reduced.

Description

Circuit substrate for new energy automobile and preparation method thereof
Technical Field
The invention relates to the technical field of circuit substrates for new energy automobiles, in particular to a circuit substrate for a new energy automobile and a preparation method thereof.
Background
With the rapid development of new energy vehicles, circuit substrates for new energy vehicles are also gradually increased, a plurality of silicon chips are arranged on the circuit substrates, at present, the circuit substrates generally adopt metal materials such as copper substrates and aluminum substrates as substrates, the linear expansion coefficient of the circuit substrates made of the metal materials is higher, and the linear expansion coefficient of the circuit substrates made of the metal materials and the silicon chips is more different. Therefore, a circuit board having a linear expansion coefficient close to that of the chip is urgently needed.
Disclosure of Invention
The invention provides a circuit substrate for a new energy automobile and a preparation method thereof, which are used for solving the technical problems in the prior art.
In order to solve the above technical problem, the present invention discloses a circuit board for a new energy vehicle, including:
preferably, the circuit board body is prepared by uniformly mixing powder, a composite sintering aid, a dispersant, a plasticizer and a binder, wherein the powder is prepared from the following components in percentage by mass: 70-95% of aluminum nitride and 5-30% of silicon nitride.
Preferably, a plurality of ventilation holes are formed in the circuit substrate body, and the upper end and the lower end of each ventilation hole penetrate through the upper surface and the lower surface of the circuit substrate body respectively.
Preferably, the vent holes are distributed in an array.
Preferably, the circuit substrate body has a thermal conductivity of not less than 24.5W/(m × K).
Preferably, the sintering aid consists of an alkali metal oxide, an alkaline earth oxide and a rare earth metal oxide.
A preparation method of a circuit substrate for a new energy automobile is used for preparing the circuit substrate for the new energy automobile, and comprises the following steps:
step 1: preparing casting slurry: adding powder, a composite sintering aid, a dispersant, a plasticizer and a binder in a preset proportion into a mixing device, adding an organic solvent for uniform mixing, and performing ball milling by using a ball mill after uniform mixing to obtain casting slurry;
step 2: tape casting: carrying out casting molding on a casting machine after removing bubbles of the casting slurry in vacuum to obtain a blank;
and step 3: preparing a green body: punching and shearing the green body into a preset size by using a punching device, and then carrying out powder coating operation to form a green body;
and 4, step 4: sintering, namely placing the green body into a sintering furnace for sintering to prepare a circuit substrate body;
and 5: surface treatment: and carrying out surface treatment on the circuit substrate body.
Preferably, in the step 5, the surface treatment includes sand removal and laser scribing.
Preferably, the mixing device comprises:
the mixing box is internally provided with a second pipeline, the upper end and the lower end of the second pipeline respectively penetrate through the upper surface and the lower surface of the mixing box, and the upper end of the second pipeline is used for inputting powder;
the third pipeline is obliquely arranged on the left side wall of the second pipeline, one end of the third pipeline is communicated with the inside of the second pipeline, the other end of the third pipeline extends to the outside of the mixing box, and the third pipeline is used for inputting an organic solvent into the second pipeline;
the fourth pipeline is obliquely arranged on the right side wall of the second pipeline, one end of the fourth pipeline is communicated with the inside of the second pipeline, the other end of the fourth pipeline extends to the outside of the mixing box, and the fourth pipeline is used for inputting a preset proportion of the composite sintering aid, a preset proportion of the dispersant, the plasticizer and the binder into the second pipeline;
the supporting plate is arranged in the second pipeline, the front end and the rear end of the supporting plate are respectively fixedly connected with the inner walls of the front side and the rear side of the second pipeline, and the upper end of the supporting plate is an inclined plane;
the first motor is arranged on the lower surface of the supporting plate, a first rotating shaft is arranged at one end of the first motor, which is far away from the supporting plate, and a plurality of stirring blades are arranged on the outer wall of the first rotating shaft;
the fixed box is arranged below the first rotating shaft, the right side wall of the fixed box is fixedly connected with the right inner wall of the second pipeline, a sliding plate is arranged in the fixed box in a sliding mode, a vertical plate is arranged on the upper surface of the sliding plate, the vertical plate extends to the outside of the fixed box and is provided with a first magnetic block, and the outer wall of the vertical plate is connected with the upper end of the fixed box in a sliding mode;
the second magnetic block is arranged at the upper end of the first magnetic block, the right end of the second magnetic block is fixedly connected with the inner wall of the right side of the second pipeline, and the second magnetic block is attracted with the first magnetic block;
the vertical rod is arranged on the lower surface of the sliding plate, one end, far away from the sliding plate, of the vertical rod penetrates through the lower end of the fixed box and is provided with a first rack, and the vertical rod is connected with the lower end of the fixed box in a sliding mode;
the reset spring is sleeved on the vertical rod, one end of the reset spring is fixedly connected with the lower surface of the sliding plate, and the other end of the reset spring is fixedly connected with the inner wall of the bottom of the fixed box;
the filter plate is arranged on the left side of the fixed box, one end of the filter plate is fixedly connected with the outer wall of the left side of the fixed box, and the other end of the filter plate is fixedly connected with the inner wall of the left side of the second pipeline;
the two fixing plates are positioned below the filter plate, the left ends of the two fixing plates are respectively fixedly connected with the inner wall of the left side of the second pipeline, a second rotating shaft is arranged between the two fixing plates, a gear column is arranged on the second rotating shaft, and the tooth shape of the gear column is meshed with the tooth shape of the first rack;
the baffle is horizontally arranged above the filter plate, a scraper is arranged at one end, close to the fixed box, of the baffle, the scraper is perpendicular to the baffle, the lower end of the scraper is in contact with the upper surface of the filter plate, the right side wall of the scraper is in contact with the left side wall of the fixed box, one end, far away from the fixed box, of the baffle extends to the outside of the left side of the second pipeline and is provided with a connecting rod, the baffle is in sliding connection with the left side wall of the second pipeline, the connecting rod is perpendicular to the baffle, the upper end of the connecting rod is fixedly connected with the left side wall of the baffle, the lower end of the connecting rod is provided with a second rack, the second rack is perpendicular to the first rack, the upper surface of the second rack is provided with teeth, one end, close to the first rack, of the second rack extends to the inside of the second pipeline and is meshed with the gear post;
the collecting box is arranged on the outer wall of the left side of the second pipeline and communicated with the inside of the second pipeline through a third through hole, and the bottom wall of the third through hole and the upper surface of the filter plate are located on the same horizontal plane.
Preferably, still include the fifth pipeline, the fifth pipeline slope sets up, fifth pipeline one end extends to inside the second pipeline, the fifth pipeline other end extends to outside the mixing box, the fifth pipeline with the inside intercommunication of second pipeline, the fifth pipeline right side wall with the contact of fixed bottom of the case wall, the fifth pipeline left side wall with second pipeline left side inner wall fixed connection.
Preferably, the punching device includes:
the device comprises a shell, wherein a support table is arranged in the shell, and a limit plate is arranged on the upper surface of the support table;
the second motor is arranged on the inner wall of the left side of the shell, a third rotating shaft is arranged at the output end of the second motor, and a first bevel gear is arranged on the third rotating shaft;
the fourth rotating shaft is arranged on the right of the third rotating shaft and is perpendicular to the third rotating shaft, the rear end of the fourth rotating shaft is rotatably connected with the inner wall of the rear side of the shell, a second bevel gear and a rotating disc are sequentially arranged on the fourth rotating shaft from back to front, the second bevel gear is meshed with the first bevel gear, a rectangular frame is arranged in front of the rotating disc, a fixed column is movably arranged in the rectangular frame horizontally, and the rear end of the fixed column is fixedly connected with the eccentric position of the front side wall of the rotating disc;
the sliding rail is arranged on the inner wall of the right side of the shell, a sliding table is arranged on the sliding rail in a sliding mode, a first fixing rod is arranged on the left side wall of the sliding table, one end of the first fixing rod is fixedly connected with the left side wall of the sliding table, a second fixing rod is arranged at the end, away from the sliding table, of the first fixing rod, the second fixing rod is perpendicular to the first fixing rod, and the end, away from the first fixing rod, of the second fixing rod is fixedly connected with the upper surface of the rectangular frame;
a third fixing rod disposed between the second fixing rod and the slide rail, the upper end of the third fixed rod is fixedly connected with the lower surface of the first fixed rod, the lower end of the third fixed rod is provided with a first pressing plate, the front end and the rear end of the first press plate are respectively connected with the inner walls of the front side and the rear side of the shell in a sliding way, the right end of the first press plate is horizontally provided with a first mounting hole and a guide hole, a first stud is arranged in the first mounting hole, one end of the first stud is rotationally connected with the inner wall of the first mounting hole, the other end of the first stud extends to the outside of the first mounting hole and is provided with a crank, a second pressing plate is connected to the first stud in a threaded manner, the second pressing plate is vertical to the first pressing plate, one side of the second pressing plate, which is close to the first pressing plate, is provided with a guide post, one end of the guide post, which is far away from the second pressure plate, extends into the guide hole and is in sliding connection with the inner wall of the guide hole;
the second mounting hole is formed in the lower end of the second pressing plate, a third pressing plate is arranged in the second mounting hole in a sliding mode, the third pressing plate is L-shaped, a first spring is arranged at the upper end of the third pressing plate, one end of the first spring is fixedly connected with the inner wall of the upper end of the second mounting hole, the other end of the first spring is fixedly connected with the upper end of the third pressing plate, one end, far away from the first spring, of the third pressing plate extends to the outside of the second mounting hole and is provided with a cutting knife, and the cutting knife is located below the first pressing plate;
the first mounting plate is arranged on the lower surface of the left end of the first pressing plate, and the upper end of the first mounting plate is fixedly connected with the lower surface of the first pressing plate;
the second mounting plate is arranged on the lower surface of the right end of the second pressing plate, and the upper end of the second mounting plate is fixedly connected with the lower surface of the second pressing plate;
the third motor is arranged on the right side wall of the first mounting plate, the output end of the third motor is provided with a second stud, one end, far away from the third motor, of the second stud is rotatably connected with the side wall of the second mounting plate, a sliding block is in threaded connection with the second stud, and the upper surface of the sliding block is in sliding connection with the lower surface of the first pressing plate;
the connecting column is arranged at the lower end of the sliding block, the upper end of the connecting column is fixedly connected with the lower end of the sliding block, a third mounting hole is formed in one end, away from the sliding block, of the connecting column, a sliding column is arranged in the third mounting hole in a sliding mode, a second spring is arranged at the upper end of the sliding column, one end of the second spring is fixedly connected with the inner wall of the upper end of the third mounting hole, and the other end of the second spring is fixedly connected with the upper end of the sliding column;
the fourth pressing plate is arranged on the sliding column and is far away from one end of the second spring, the upper surface of the fourth pressing plate is fixedly connected with the lower end of the sliding column, and the fourth pressing plate is located above the limiting plate in the right direction.
The technical scheme of the invention has the following advantages: the invention provides a circuit substrate for a new energy automobile and a preparation method thereof, wherein the preparation method comprises the following steps: the circuit board comprises a circuit board body, wherein the circuit board body is prepared by uniformly mixing powder, a composite sintering aid, a dispersing agent, a plasticizer and a binder, and the powder is prepared from the following components in percentage by mass: 70-95% of aluminum nitride and 5-30% of silicon nitride. The linear expansion coefficient of the circuit substrate body is close to that of the silicon chip, so that the problem that the chip on the circuit substrate cracks in the use process can be avoided, meanwhile, the circuit substrate is high in heat conductivity and capable of dissipating heat quickly, the service lives of the chip and the circuit substrate are prolonged, the stability of the circuit substrate is improved, and the production cost is reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the apparatus particularly pointed out in the written description and drawings thereof.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a circuit substrate for a new energy vehicle according to the present invention;
fig. 2 is a flowchart of a method for manufacturing a circuit substrate for a new energy vehicle according to the present invention;
FIG. 3 is a schematic view of the internal structure of the mixing device of the present invention;
FIG. 4 is a schematic view of another embodiment of the mixing device of the present invention;
FIG. 5 is a schematic view of the internal structure of the punching device according to the present invention;
FIG. 6 is an enlarged view of the area A in FIG. 5 according to the present invention.
In the figure: 1. a circuit substrate body; 2. the air vent 3, the mixing box 4, the second pipeline 5, the third pipeline 6, the fourth pipeline 7, the support plate 8, the first motor 9, the first rotating shaft 10, the stirring blade 11, the fixed box 12, the sliding plate 13, the vertical plate 14, the first magnetic block 15, the second magnetic block 16, the vertical rod 17, the first rack 18, the return spring 19, the filter plate 20, the fixed plate 21, the second rotating shaft 22, the gear column 23, the baffle plate 24, the scraper 25, the connecting rod 26, the second rack 27, the collecting box 28, the third through hole 29, the fifth pipeline 30, the shell 31, the support table 32, the limiting plate 33, the second motor 34, the third rotating shaft 35, the first bevel gear 36, the fourth rotating shaft 37, the second bevel gear 38, the rotating disc 39, the rectangular frame 40, the fixed column 41, the sliding rail 42, the sliding table 43, the second motor 9, the first rotating shaft 10, the second rotating shaft 22, the sliding plate 24, the second rotating shaft, the collecting box 28, the third through hole 29, the fifth pipeline 30, the housing 31, the support table 32, the second bevel gear, the second rotating shaft, the rotating disc 38, the rotating disc 39, the rotating disc, The device comprises a first fixing rod 44, a second fixing rod 45, a third fixing rod 46, a first pressing plate 47, a first mounting hole 48, a guide hole 49, a first stud 50, a crank 51, a second pressing plate 52, a guide post 53, a second mounting hole 54, a third pressing plate 55, a first spring 56, a cutting knife 57, a first mounting plate 58, a second mounting plate 59, a third motor 60, a second stud 61, a sliding block 62, a connecting post 63, a third mounting hole 64, a sliding post 65, a second spring 66 and a fourth pressing plate.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions and technical features between various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not be within the protection scope of the present invention.
Example 1:
an embodiment of the present invention provides a circuit substrate for a new energy vehicle, as shown in fig. 1 to 6, including: the circuit board comprises a circuit board body 1, wherein the circuit board body 1 is prepared by uniformly mixing powder, a composite sintering aid, a dispersing agent, a plasticizer and a binder, and the powder is prepared from the following components in percentage by mass: 70-95% of aluminum nitride and 5-30% of silicon nitride.
The working principle and the beneficial effects of the technical scheme are as follows: in the invention, the circuit substrate body 1 is prepared by uniformly mixing powder, a composite sintering aid, a dispersant, a plasticizer and a binder, wherein the powder is prepared from the following components in percentage by mass: 70% -95% of aluminum nitride and 5% -30% of silicon nitride, the linear expansion coefficient of the circuit substrate body 1 can be improved by adding the silicon nitride into the circuit substrate body 1, so that the linear expansion coefficient of the circuit substrate body 1 is close to that of a silicon chip, the problem that the chip on the circuit substrate cracks in the use process can be avoided, meanwhile, the circuit substrate is high in heat conductivity and can quickly dissipate heat, the service lives of the chip and the circuit substrate are prolonged, the stability of the circuit substrate is improved, and the production cost is reduced.
Example 2
On the basis of the above embodiment 1, as shown in fig. 1 to 6, a plurality of ventilation holes 2 are provided in the circuit substrate body 1, and the upper and lower ends of the ventilation holes 2 respectively penetrate through the upper surface and the lower surface of the circuit substrate body 1;
the vent holes 2 are distributed in an array;
the thermal conductivity of the circuit substrate body 1 is not lower than 24.5W/m K;
the sintering aid consists of alkali metal oxide, alkaline earth oxide and rare earth metal oxide.
The working principle and the beneficial effects of the technical scheme are as follows: set up ventilation hole 2 in the circuit substrate body 1, can improve circuit substrate's radiating rate, avoid the part on circuit substrate body 1 surface to work under high temperature for a long time, the thermal conductivity of this circuit substrate body 1 is not less than 24.5W/m K, the life of circuit substrate body 1 has been improved greatly, the sintering auxiliary agent comprises alkali metal oxide, alkaline earth oxide and rare earth metal oxide, can reduce sintering temperature, improve sintering efficiency, and be favorable to improving the comprehensive properties of circuit substrate body 1.
As the existing ceramic circuit substrate manufacturing process is imperfect, and the product has the defects of poor stability and low percent of pass, as shown in fig. 2, the invention also provides a circuit substrate manufacturing method for a new energy automobile, which is used for manufacturing the circuit substrate for the new energy automobile and comprises the following steps:
step 1: preparing casting slurry: adding powder, a composite sintering aid, a dispersant, a plasticizer and a binder in a preset proportion into a mixing device, adding an organic solvent for uniform mixing, and performing ball milling by using a ball mill after uniform mixing to obtain casting slurry;
step 2: tape casting: carrying out casting molding on a casting machine after removing bubbles of the casting slurry in vacuum to obtain a blank;
and 3, step 3: preparing a green body: punching and shearing the green body into a preset size by using a punching device, and then carrying out powder coating operation to form a green body;
and 4, step 4: sintering, namely placing the green body into a sintering furnace for sintering to prepare a circuit substrate body 1;
and 5: surface treatment: and carrying out surface treatment on the circuit substrate body 1, wherein the surface treatment comprises sand removal, laser scribing and the like.
The working principle and the beneficial effects of the technical scheme are as follows: when the circuit substrate for the new energy automobile is manufactured, firstly, casting slurry is prepared, powder, a composite sintering aid, a dispersing agent, a plasticizer and a binder in a preset proportion are added into a mixing device, an organic solvent is added for uniform mixing, a ball mill is used for ball milling after uniform mixing to obtain the casting slurry, then the casting slurry is subjected to casting molding by adopting a traditional casting method, casting molding is carried out on the casting slurry on a casting machine after vacuum bubble removal to obtain a blank, then the blank is stamped by using a stamping device, then powder coating operation is carried out to form the blank, then the blank is placed into a sintering furnace for sintering to prepare a circuit substrate body 1, and finally, the surface treatment is carried out on the circuit substrate body 1, wherein the powder, the composite sintering aid, the dispersing agent, the plasticizer and the binder in the preset proportion cannot be uniformly mixed due to the incompleteness of the traditional production process and equipment, in addition, the blank is easy to shift in the punching and shearing process, and the final qualification rate of the circuit substrate body 1 is reduced, so that the powder, the composite sintering aid, the dispersing agent, the plasticizer and the binder in a preset proportion can be uniformly mixed by arranging the mixing device, the qualification rate of the circuit substrate body 1 is improved, and the blank is not easy to shift when the punching and shearing device is used for punching and shearing, so that the size precision of the circuit substrate body 1 is improved, and the production benefit is improved.
In one embodiment, as shown in fig. 3, the mixing device includes:
a second pipeline 4 is arranged in the mixing box 3, the upper end and the lower end of the second pipeline 4 respectively penetrate through the upper surface and the lower surface of the mixing box 3, and the upper end of the second pipeline 4 is used for inputting powder;
the third pipeline 5 is obliquely arranged on the left side wall of the second pipeline 4, one end of the third pipeline 5 is communicated with the inside of the second pipeline 4, the other end of the third pipeline 5 extends to the outside of the mixing box 3, and the third pipeline 5 is used for inputting an organic solvent into the second pipeline 4;
the fourth pipeline 6 is obliquely arranged on the right side wall of the second pipeline 4, one end of the fourth pipeline 6 is communicated with the inside of the second pipeline 4, the other end of the fourth pipeline 6 extends to the outside of the mixing box 3, and the fourth pipeline 6 is used for inputting a preset proportion of the composite sintering aid, a preset proportion of the dispersant, the plasticizer and the binder into the second pipeline 4;
the supporting plate 7 is arranged in the second pipeline 4, the front end and the rear end of the supporting plate 7 are fixedly connected with the inner walls of the front side and the rear side of the second pipeline 4 respectively, and the upper end of the supporting plate 7 is an inclined plane;
the first motor 8 is arranged on the lower surface of the supporting plate 7, a first rotating shaft 9 is arranged at one end, far away from the supporting plate 7, of the first motor 8, and a plurality of stirring blades 10 are arranged on the outer wall of the first rotating shaft 9;
the fixed box 11 is arranged below the first rotating shaft 9, the right side wall of the fixed box 11 is fixedly connected with the right inner wall of the second pipeline 4, a sliding plate 12 is arranged in the fixed box 11 in a sliding mode, a vertical plate 13 is arranged on the upper surface of the sliding plate 12, the vertical plate 13 extends to the outside of the fixed box 11 and is provided with a first magnetic block 14, and the outer wall of the vertical plate 13 is connected with the upper end of the fixed box 11 in a sliding mode;
the second magnetic block 15 is arranged at the upper end of the first magnetic block 14, the right end of the second magnetic block 15 is fixedly connected with the inner wall of the right side of the second pipeline 4, and the second magnetic block 15 is attracted with the first magnetic block 14;
the vertical rod 16 is arranged on the lower surface of the sliding plate 12, one end, far away from the sliding plate 12, of the vertical rod 16 penetrates through the lower end of the fixed box 11 and is provided with a first rack 17, and the vertical rod 16 is connected with the lower end of the fixed box 11 in a sliding mode;
the reset spring 18 is sleeved on the vertical rod 16, one end of the reset spring 18 is fixedly connected with the lower surface of the sliding plate 12, and the other end of the reset spring 18 is fixedly connected with the inner wall of the bottom of the fixed box 11;
the filter plate 19 is arranged on the left side of the fixed box 11, one end of the filter plate 19 is fixedly connected with the outer wall of the left side of the fixed box 11, and the other end of the filter plate 19 is fixedly connected with the inner wall of the left side of the second pipeline 4;
the two fixing plates 20 are positioned below the filter plate 19, the left ends of the two fixing plates 20 are respectively fixedly connected with the inner wall of the left side of the second pipeline 4, a second rotating shaft 21 is arranged between the two fixing plates 20, a gear column 22 is arranged on the second rotating shaft 21, and the tooth form of the gear column 22 is meshed with the tooth form of the first rack 17;
a baffle 23, the baffle 23 is horizontally arranged above the filter plate 19, one end of the baffle 23 close to the fixed box 11 is provided with a scraper 24, the scraping plate 24 is vertical to the baffle plate 23, the lower end of the scraping plate 24 is contacted with the upper surface of the filter plate 19, the right side wall of the scraper 24 is contacted with the left side wall of the fixed box 11, one end of the baffle plate 23 far away from the fixed box 11 extends to the outside of the left side of the second pipeline 4 and is provided with a connecting rod 25, the baffle plate 23 is slidably connected with the left side wall of the second pipeline 4, the connecting rod 25 is perpendicular to the baffle plate 23, the upper end of the connecting rod 25 is fixedly connected with the left end of the baffle 23, the lower end of the connecting rod 25 is provided with a second rack 26, the second rack 26 is perpendicular to the first rack 17, the upper surface of the second rack 26 is toothed, the second rack 26 extends to the inside of the second pipe 4 near one end of the first rack 17 and is meshed with the gear column 22;
the collecting box 27 is arranged on the outer wall of the left side of the second pipeline 4, the collecting box 27 is communicated with the inside of the second pipeline 4 through a third through hole 28, and the bottom wall of the third through hole 28 and the upper surface of the filter plate 19 are positioned on the same horizontal plane.
The working principle and the beneficial effects of the technical scheme are as follows: when the powder material mixer is used, powder material is input into the second pipeline 4 through the upper end of the second pipeline 4, then the composite sintering aid with the preset proportion, the dispersant with the preset proportion, the plasticizer and the binder are added into the second pipeline 4 from the fourth pipeline 6, meanwhile, the organic solvent is added into the second pipeline 4 through the third pipeline 5 to form a mixed solution, the uniform mixing of the powder material, the composite sintering aid with the preset proportion, the dispersant with the preset proportion, the plasticizer and the binder is facilitated through the addition of the organic solvent, in an initial state, the first magnetic block 14 and the second magnetic block 15 are attracted under the action of magnetic force, the right side wall of the scraper 24 is contacted with the left side wall of the fixing box 11, the mixed solution can be separated into the second pipeline 4 through the first magnetic block 14 and the vertical plate 13, the mixed solution cannot flow into the right side of the vertical plate 13 and the lower side of the first magnetic block 14, and cannot flow into the fixing box 11 under the sealing action at the same time, the mixed liquid is stored in the second pipeline 4 above the baffle plate 23, the first motor 8 is started along with the input of the powder, the organic solvent, the composite sintering aid, the dispersing agent, the plasticizer and the binder, the first motor 8 rotates to drive the first rotating shaft 9 to rotate, the first rotating shaft 9 rotates to drive the stirring blade 10 to rotate, the stirring blade 10 stirs the mixed liquid, so that the powder, the organic solvent, the composite sintering aid, the dispersing agent, the plasticizer and the binder are uniformly mixed, the mixed liquid starts to downwards extrude the first magnetic block 14 along with the increase of the mixed liquid, when the gravity of the mixed liquid is greater than the magnetic force of the second magnetic block 15 and the first magnetic block 14, the first magnetic block 14 is separated from the second magnetic block 15, the first magnetic block 14 rapidly descends under the action of gravity, the first magnetic block 14 drives the vertical plate 13 to downwards slide along the upper end of the fixed box 11, the vertical rod 16 drives the sliding plate 12 to rapidly downwards slide in the fixed box 11, the sliding plate 12 drives the first rack 17 to move downwards through the vertical rod 16, the first rack 17 drives the gear column 22 to rotate clockwise, the gear column 22 drives the second rack 26 to slide leftwards, the second rack 26 drives the baffle 23 to slide leftwards through the connecting rod 25, the baffle 23 drives the scraper 24 to slide leftwards and rightwards on the upper surface of the filter plate 19, the scraper 24 is far away from the fixed box 11, meanwhile, the scraper 24 scrapes large-particle powder on the upper surface of the filter plate 19 and collects the large-particle powder into the collecting box 27 uniformly, the mixed liquid intercepted above the baffle 23 flows out through the filter plate 19 and then flows into the ball mill through the second pipeline 4, the ball mill is used for ball milling, along with the gradual reduction of the mixed liquid in the second pipeline 4, the force borne by the first magnetic block 14 is also gradually reduced, when the force borne by the first magnetic block 14 is smaller than the elastic force of the return spring 18, the sliding plate 12 slides upwards under the action of the return spring 18, the sliding rod drives the first magnetic block 14 to move upwards through the vertical plate 13, under the action of the magnetic force of the second magnetic block 15, the first magnetic block 14 and the second magnetic block 15 are attracted again, meanwhile, the sliding plate 12 drives the first rack 17 to move upwards through the vertical rod 16, the first rack 17 drives the gear column 22 to rotate anticlockwise, the gear column 22 drives the second rack 26 to slide rightwards, the second rack 26 drives the baffle plate 23 to move towards the fixed box 11 through the connecting rod 25, finally, the right side wall of the scraper 24 is attached to the left side wall of the fixed box 11 again, the baffle plate 23 continues to block the mixed liquid in the second pipeline 4, through the arrangement of the mixing device, powder, an organic solvent, a composite sintering aid, a dispersing agent, a plasticizer and a binder can be simultaneously put into the second pipeline 4, then the mixed liquid is uniformly mixed under the stirring of the stirring blade 10, and under the intercepting action of the baffle plate 23, the mixed liquid can be kept above the baffle plate 23 for a period of time, is in a state of being stirred all the time, provides sufficient time for mixing powder, organic solvent, composite sintering aid, dispersant, plasticizer and binder, when the mixed liquid reaches the preset weight, the baffle 23 is automatically opened, the mixed liquid flows out through the filter plate 19, the filter plate 19 can play a role in screening, large-particle powder, the composite sintering aid, the dispersing agent, the plasticizer and the binder can be screened out, by controlling the particle size, the purity and uniformity of the powder are improved, which is helpful for improving the quality of the circuit substrate body 1, and, the intermittent opening of baffle 23 can control the volume that each mixed liquid flows out for the weight of ball-milling at each time keeps unanimous, has improved the uniformity of product, has finally improved the stability and the qualification rate of circuit substrate body 1, has optimized production technology, has reduced the production of waste product, has reduced manufacturing cost.
In one embodiment, as shown in fig. 4, the mixing tank further includes a fifth pipeline 29, the fifth pipeline 29 is disposed obliquely, one end of the fifth pipeline 29 extends into the second pipeline 4, the other end of the fifth pipeline 29 extends out of the mixing tank 3, the fifth pipeline 29 is communicated with the inside of the second pipeline 4, the right side wall of the fifth pipeline 29 is in contact with the bottom wall of the fixed tank 11, and the left side wall of the fifth pipeline 29 is fixedly connected with the left inner wall of the second pipeline 4.
The working principle and the beneficial effects of the technical scheme are as follows: still be provided with the fifth pipeline 29 in the slope in mixing box 3, the fifth pipeline 29 communicates with second pipeline 4, can receive the mixed liquid through filter 19 through fifth pipeline 29, then flows out from the export of fifth pipeline 29, and the export of fifth pipeline 29 also is connected with the ball mill, the subsequent ball-milling of being convenient for.
In one embodiment, as shown in fig. 5 and 6, the punching device includes:
the device comprises a shell 30, wherein a support table 31 is arranged in the shell 30, and a limit plate 32 is arranged on the upper surface of the support table 31;
the second motor 33 is arranged on the inner wall of the left side of the shell 30, the output end of the second motor 33 is provided with a third rotating shaft 34, and the third rotating shaft 34 is provided with a first bevel gear 35;
a fourth rotating shaft 36, the fourth rotating shaft 36 is arranged at the right of the third rotating shaft 34, the fourth rotating shaft 36 is perpendicular to the third rotating shaft 34, the rear end of the fourth rotating shaft 36 is rotatably connected with the inner wall of the rear side of the shell 30, a second bevel gear 37 and a rotating disc 38 are sequentially arranged on the fourth rotating shaft 36 from back to front, the second bevel gear 37 is engaged with the first bevel gear 35, a rectangular frame 39 is arranged in front of the rotating disc 38, a fixing column 40 is horizontally movably arranged in the rectangular frame 39, and the rear end of the fixing column 40 is fixedly connected with the eccentric position of the front side wall of the rotating disc 38;
the sliding rail 41 is arranged on the inner wall of the right side of the housing 30, the sliding rail 41 is provided with a sliding table 42 in a sliding manner, the left side wall of the sliding table 42 is provided with a first fixing rod 43, one end of the first fixing rod 43 is fixedly connected with the left side wall of the sliding table 42, one end of the first fixing rod 43, which is far away from the sliding table 42, is provided with a second fixing rod 44, the second fixing rod 44 is perpendicular to the first fixing rod 43, and one end of the second fixing rod 44, which is far away from the first fixing rod 43, is fixedly connected with the upper surface of the rectangular frame 39;
a third fixing rod 45, the third fixing rod 45 is arranged between the second fixing rod 44 and the slide rail 41, the upper end of the third fixing rod 45 is fixedly connected with the lower surface of the first fixing rod 43, the lower end of the third fixing rod 45 is provided with a first pressing plate 46, the front end and the rear end of the first pressing plate 46 are respectively connected with the inner walls of the front side and the rear side of the shell 30 in a sliding manner, the right end of the first pressing plate 46 is horizontally provided with a first mounting hole 47 and a guide hole 48, a first stud 49 is arranged in the first mounting hole 47, one end of the first stud 49 is rotatably connected with the inner wall of the first mounting hole 47, the other end of the first stud 49 extends to the outside of the first mounting hole 47 and is provided with a crank 50, the first stud 49 is connected with a second pressing plate 51 through a thread, the second pressing plate 51 is perpendicular to the first pressing plate 46, and one side of the second pressing plate 51 close to the first pressing plate 46 is provided with a guide column 52, one end of the guide post 52, which is far away from the second pressing plate 51, extends into the guide hole 48 and is in sliding connection with the inner wall of the guide hole 48;
a second mounting hole 53, the second mounting hole 53 is arranged at the lower end of the second pressing plate 51, a third pressing plate 54 is slidably arranged in the second mounting hole 53, the third pressing plate 54 is L-shaped, a first spring 55 is arranged at the upper end of the third pressing plate 54, one end of the first spring 55 is fixedly connected with the inner wall of the upper end of the second mounting hole 53, the other end of the first spring 55 is fixedly connected with the upper end of the third pressing plate 54, one end of the third pressing plate 54, which is far away from the first spring 55, extends to the outside of the second mounting hole 53 and is provided with a cutting knife 56, and the cutting knife 56 is positioned below the first pressing plate 46;
the first mounting plate 57 is arranged on the lower surface of the left end of the first pressure plate 46, and the upper end of the first mounting plate 57 is fixedly connected with the lower surface of the first pressure plate 46;
the second mounting plate 58 is arranged on the lower surface of the right end of the second pressure plate 51, and the upper end of the second mounting plate 58 is fixedly connected with the lower surface of the second pressure plate 51;
the third motor 59 is arranged on the right side wall of the first mounting plate 57, a second stud 60 is arranged at the output end of the third motor 59, one end, far away from the third motor 59, of the second stud 60 is rotatably connected with the side wall of the second mounting plate 58, a sliding block 61 is connected to the second stud 60 in a threaded mode, and the upper surface of the sliding block 61 is connected with the lower surface of the first pressing plate 46 in a sliding mode;
the connecting column 62 is arranged at the lower end of the sliding block 61, the upper end of the connecting column 62 is fixedly connected with the lower end of the sliding block 61, one end, far away from the sliding block 61, of the connecting column 62 is provided with a third mounting hole 63, a sliding column 64 is slidably arranged in the third mounting hole 63, the upper end of the sliding column 64 is provided with a second spring 65, one end of the second spring 65 is fixedly connected with the inner wall of the upper end of the third mounting hole 63, and the other end of the second spring 65 is fixedly connected with the upper end of the sliding column 64;
the third pressing plate 54 is arranged at one end of the sliding column 64, which is far away from the second spring 65, the upper surface of the third pressing plate 54 is fixedly connected with the lower end of the sliding column 64, and the third pressing plate 54 is positioned above the limiting plate 32 on the right.
The working principle and the beneficial effects of the technical scheme are as follows: when the device is used, a blank is placed on the supporting table 31, the left end of the blank is in contact with the right side wall of the limiting plate 32 to prevent the blank from being offset when the blank is punched and sheared, then the crank 50 is rotated according to the preset size of the punching and shearing, the crank 50 rotates to drive the first stud 49 to rotate in the first mounting hole 47, the second pressing plate 51 can move left and right under the guide action of the thread transmission and the guide post 52, so that the distance between the cutting knife 56 and the limiting plate 32 is adjusted, the horizontal distance between the cutting knife 56 and the limiting plate 32 is equal to the preset size of the blank, then the second motor 33 is started, the second motor 33 rotates to drive the third rotating shaft 34 to rotate, the third rotating shaft 34 rotates to drive the first bevel gear 35 to rotate, the first bevel gear 35 rotates to drive the second bevel gear 37 to rotate, the second bevel gear 37 rotates to drive the turntable 38 to rotate through the fourth rotating shaft 36, and the fixing post 40 at the front side wall of the turntable 38 rotates when the turntable 38 rotates, the fixed column 40 rotates to drive the rectangular frame 39 to reciprocate up and down in front of the turntable 38, the sliding table 42 on the sliding rail 41 reciprocates up and down on the sliding rail 41 through the first fixed rod 43 and the second fixed rod 44, the third fixed rod 45 reciprocates up and down along with the first fixed rod 43 and drives the first press plate 46 to reciprocate up and down, the first press plate 46 drives the first mounting plate 57, the second mounting plate 58, the third motor 59, the second stud 60, the slider 61 and the second press plate 51 to reciprocate up and down integrally, when the second press plate 51 presses down, the cutting knife 56 can contact with the green body and then slowly cut the green body, the first spring 55 slowly compresses, then the fourth press plate 66 contacts with the green body and presses down the green body to punch the green body, during the punching process, the cutting knife 56 cuts the green body to a preset size and limits the green body together with the limit plate 32, the blank body is prevented from deviating when the fourth pressing plate 66 is pressed down, the punching and shearing quality and precision are improved, after the fourth pressing plate 66 is pressed down once, the third motor 59 is started, the third motor 59 is a reciprocating motor, the third motor 59 rotates to drive the second stud 60 to rotate, the second stud 60 rotates to drive the sliding block 61 to move along the second stud 60, the sliding block 61 drives the sliding column 64 and the fourth pressing plate 66 to move through the connecting column 62, the pressing position of the fourth pressing plate 66 is changed, the comprehensive punching of the blank body is realized, and finally, a high-quality green body with preset size is formed, so that the problem of deviation when the blank body is punched and sheared in a punching process is solved, the stability and the qualification rate of the circuit substrate body 1 are further improved, and the size and the thickness of each circuit substrate body 1 are ensured to be consistent.
In one embodiment, further comprising:
the first temperature detection device is arranged on the outer wall of the sintering furnace and is used for detecting the temperature of the outer wall of the sintering furnace;
the second temperature detection device is arranged outside the sintering furnace and is used for detecting the external environment temperature of the sintering furnace;
the alarm is arranged outside the sintering furnace;
the controller is arranged outside the sintering furnace and is electrically connected with the first temperature detection device, the second temperature detection device and the alarm respectively;
the controller controls the alarm to work based on the first temperature detection device and the second temperature detection device, and the method comprises the following steps:
step 11: calculating an actual heat loss rate of the sintering furnace based on the detection values of the first temperature detection device and the second temperature detection device by the following formula:
Figure BDA0003350893640000171
wherein the content of the first and second substances,
Figure BDA0003350893640000172
is the actual heat loss rate, gamma, of the sintering furnace1Is the convective heat transfer coefficient, gamma, of the outer wall of the sintering furnace2Is the radiant heat transfer coefficient, S, of the outer wall of the sintering furnace1Is the surface area of the outer wall of the sintering furnace, T1The temperature T of the outer wall of the sintering furnace detected by the first temperature detection device2The temperature of the external environment of the sintering furnace, Q, detected by the second temperature detection devicezIs the total heat input into the sintering furnace;
step 21: based on the calculation result of the step 11, the controller compares the actual heat loss rate of the sintering furnace with a preset heat loss rate, and when the actual heat loss rate of the sintering furnace is larger than the preset heat loss rate, the controller controls the alarm to send an alarm prompt.
The working principle and the beneficial effects of the technical scheme are as follows: the heat loss of the sintering furnace is more, the sintering quality of a circuit substrate body is poor, the sintering time is long, and the production cost is increased1Take 5W/(m)2*℃)，γ2Take 3W/(m)2*℃)，S1Take 1m2，T1Taking at 90 ℃ T2Taking at 30 ℃ QzTake 4800W, then
Figure BDA0003350893640000173
The calculated heat loss rate can reach 10%, the preset heat loss rate is 8%, at the moment, the actual heat loss rate of the sintering furnace is larger than the preset heat loss rate, the controller controls the alarm to send an alarm prompt, and a worker can check the sintering furnace according to the alarm prompt, so that the heat loss of the sintering furnace is reduced, the sintering time is shortened, the cost is saved, and the sintering quality is improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (8)

1. A preparation method of a circuit substrate for a new energy automobile is characterized by comprising the following steps:
step 1: preparing casting slurry: adding powder, a composite sintering aid, a dispersant, a plasticizer and a binder in a preset proportion into a mixing device, adding an organic solvent for uniform mixing, and performing ball milling by using a ball mill after uniform mixing to obtain casting slurry;
step 2: tape casting: carrying out casting molding on a casting machine after removing bubbles of the casting slurry in vacuum to obtain a blank;
and step 3: preparing a green body: punching and shearing the green body into a preset size by using a punching device, and then carrying out powder coating operation to form a green body;
and 4, step 4: sintering, namely placing the green body into a sintering furnace for sintering to prepare a circuit substrate body (1);
and 5: surface treatment: performing surface treatment on the circuit substrate body (1);
the mixing device comprises:
the mixing box (3) is internally provided with a second pipeline (4), the upper end and the lower end of the second pipeline (4) respectively penetrate through the upper surface and the lower surface of the mixing box (3), and the upper end of the second pipeline (4) is used for inputting powder;
the third pipeline (5) is obliquely arranged on the left side wall of the second pipeline (4), one end of the third pipeline (5) is communicated with the inside of the second pipeline (4), the other end of the third pipeline (5) extends to the outside of the mixing box (3), and the third pipeline (5) is used for inputting an organic solvent into the second pipeline (4);
the fourth pipeline (6) is obliquely arranged on the right side wall of the second pipeline (4), one end of the fourth pipeline (6) is communicated with the inside of the second pipeline (4), the other end of the fourth pipeline (6) extends to the outside of the mixing box (3), and the fourth pipeline (6) is used for inputting a preset proportion of a composite sintering aid, a preset proportion of a dispersing agent, a preset proportion of a plasticizer and a binder into the second pipeline (4);
the supporting plate (7) is arranged in the second pipeline (4), the front end and the rear end of the supporting plate (7) are fixedly connected with the inner walls of the front side and the rear side of the second pipeline (4) respectively, and the upper end of the supporting plate (7) is arranged to be an inclined plane;
the stirring device comprises a first motor (8), wherein the first motor (8) is arranged on the lower surface of the supporting plate (7), one end, far away from the supporting plate (7), of the first motor (8) is provided with a first rotating shaft (9), and the outer wall of the first rotating shaft (9) is provided with a plurality of stirring blades (10);
the fixed box (11) is arranged below the first rotating shaft (9), the right side wall of the fixed box (11) is fixedly connected with the inner wall of the right side of the second pipeline (4), a sliding plate (12) is arranged in the fixed box (11) in a sliding mode, a vertical plate (13) is arranged on the upper surface of the sliding plate (12), the vertical plate (13) extends to the outside of the fixed box (11) and is provided with a first magnetic block (14), and the outer wall of the vertical plate (13) is connected with the upper end of the fixed box (11) in a sliding mode;
the second magnetic block (15) is arranged at the upper end of the first magnetic block (14), the right end of the second magnetic block (15) is fixedly connected with the inner wall of the right side of the second pipeline (4), and the second magnetic block (15) is attracted with the first magnetic block (14);
the vertical rod (16) is arranged on the lower surface of the sliding plate (12), one end, far away from the sliding plate (12), of the vertical rod (16) penetrates through the lower end of the fixed box (11) and is provided with a first rack (17), and the vertical rod (16) is connected with the lower end of the fixed box (11) in a sliding mode;
the reset spring (18) is sleeved on the vertical rod (16), one end of the reset spring (18) is fixedly connected with the lower surface of the sliding plate (12), and the other end of the reset spring (18) is fixedly connected with the inner wall of the bottom of the fixed box (11);
the filter plate (19) is arranged on the left side of the fixed box (11), one end of the filter plate (19) is fixedly connected with the outer wall of the left side of the fixed box (11), and the other end of the filter plate (19) is fixedly connected with the inner wall of the left side of the second pipeline (4);
the two fixing plates (20) are positioned below the filter plate (19), the left ends of the two fixing plates (20) are respectively fixedly connected with the inner wall of the left side of the second pipeline (4), a second rotating shaft (21) is arranged between the two fixing plates (20), a gear column (22) is arranged on the second rotating shaft (21), and the tooth form of the gear column (22) is meshed with the tooth form of the first rack (17);
baffle (23), baffle (23) level setting is in filter (19) top, baffle (23) are close to fixed case (11) one end sets up scraper blade (24), scraper blade (24) perpendicular to baffle (23), scraper blade (24) lower extreme with surface contact on filter (19), scraper blade (24) right side wall with fixed case (11) left side wall contact, baffle (23) are kept away from fixed case (11) one end extend to second pipeline (4) left side outside and set up connecting rod (25), baffle (23) with second pipeline (4) left side wall sliding connection, connecting rod (25) perpendicular to baffle (23), connecting rod (25) upper end with baffle (23) left end fixed connection, connecting rod (25) lower extreme sets up second rack (26), the second rack (26) is perpendicular to the first rack (17), the upper surface of the second rack (26) is toothed, and one end, close to the first rack (17), of the second rack (26) extends into the second pipeline (4) and is meshed with the gear column (22);
the collecting box (27) is arranged on the outer wall of the left side of the second pipeline (4), the collecting box (27) is communicated with the inside of the second pipeline (4) through a third through hole (28), and the bottom wall of the third through hole (28) and the upper surface of the filter plate (19) are positioned on the same horizontal plane;
the circuit substrate for the new energy automobile includes: the circuit board comprises a circuit board body (1), wherein the circuit board body (1) is prepared by uniformly mixing powder, a composite sintering aid, a dispersing agent, a plasticizer and a binder, and the powder is prepared from the following components in percentage by mass: 70-95% of aluminum nitride and 5-30% of silicon nitride.
2. The method for manufacturing the circuit substrate for the new energy automobile according to claim 1, wherein a plurality of vent holes (2) are formed in the circuit substrate body (1), and upper and lower ends of the vent holes (2) respectively penetrate through the upper surface and the lower surface of the circuit substrate body (1).
3. The method for manufacturing the circuit substrate for the new energy automobile according to claim 2, wherein the vent holes (2) are distributed in an array.
4. The method for manufacturing the circuit board for the new energy automobile according to claim 1, wherein the thermal conductivity of the circuit board body (1) is not less than 24.5W/(m-K).
5. The method for manufacturing a circuit board for a new energy automobile according to claim 1, wherein the sintering aid is composed of an alkali metal oxide, an alkaline earth oxide, and a rare earth metal oxide.
6. The method for manufacturing the circuit substrate for the new energy automobile according to claim 1, wherein in the step 5, the surface treatment includes sand removal and laser scribing.
7. The method for manufacturing the circuit board for the new energy automobile according to claim 1, further comprising a fifth pipeline (29), wherein the fifth pipeline (29) is obliquely arranged, one end of the fifth pipeline (29) extends into the second pipeline (4), the other end of the fifth pipeline (29) extends to the outside of the mixing box (3), the fifth pipeline (29) is communicated with the inside of the second pipeline (4), the right side wall of the fifth pipeline (29) is in contact with the bottom wall of the fixing box (11), and the left side wall of the fifth pipeline (29) is fixedly connected with the left side inner wall of the second pipeline (4).
8. The method for manufacturing the circuit substrate for the new energy automobile according to claim 1, wherein the punching device comprises:
the device comprises a shell (30), wherein a support table (31) is arranged in the shell (30), and a limit plate (32) is arranged on the upper surface of the support table (31);
the second motor (33) is arranged on the inner wall of the left side of the shell (30), the output end of the second motor (33) is provided with a third rotating shaft (34), and the third rotating shaft (34) is provided with a first bevel gear (35);
the fourth rotating shaft (36) is arranged on the right side of the third rotating shaft (34), the fourth rotating shaft (36) is perpendicular to the third rotating shaft (34), the rear end of the fourth rotating shaft (36) is rotatably connected with the inner wall of the rear side of the shell (30), a second bevel gear (37) and a rotating disc (38) are sequentially arranged on the fourth rotating shaft (36) from back to front, the second bevel gear (37) is meshed with the first bevel gear (35), a rectangular frame (39) is arranged in front of the rotating disc (38), a fixing column (40) is movably arranged in the rectangular frame (39), and the rear end of the fixing column (40) is fixedly connected with the eccentric position of the front side wall of the rotating disc (38);
the sliding rail (41) is arranged on the inner wall of the right side of the shell (30), the sliding table (42) is arranged on the sliding rail (41) in a sliding mode, a first fixing rod (43) is arranged on the left side wall of the sliding table (42), one end of the first fixing rod (43) is fixedly connected with the left side wall of the sliding table (42), a second fixing rod (44) is arranged at one end, away from the sliding table (42), of the first fixing rod (43), the second fixing rod (44) is perpendicular to the first fixing rod (43), and one end, away from the first fixing rod (43), of the second fixing rod (44) is fixedly connected with the upper surface of the rectangular frame (39);
a third fixing rod (45), the third fixing rod (45) is arranged between the second fixing rod (44) and the sliding rail (41), the upper end of the third fixing rod (45) is fixedly connected with the lower surface of the first fixing rod (43), a first pressing plate (46) is arranged at the lower end of the third fixing rod (45), the front end and the rear end of the first pressing plate (46) are respectively connected with the inner walls of the front side and the rear side of the shell (30) in a sliding manner, a first mounting hole (47) and a guide hole (48) are horizontally arranged at the right end of the first pressing plate (46), a first stud (49) is arranged in the first mounting hole (47), one end of the first stud (49) is rotatably connected with the inner wall of the first mounting hole (47), the other end of the first stud (49) extends to the outside of the first mounting hole (47) and is provided with a crank (50), and a second pressing plate (51) is connected to the first stud (49) in a threaded manner, the second pressing plate (51) is perpendicular to the first pressing plate (46), one side, close to the first pressing plate (46), of the second pressing plate (51) is provided with a guide post (52), one end, far away from the second pressing plate (51), of the guide post (52) extends into the guide hole (48) and is in sliding connection with the inner wall of the guide hole (48);
the second mounting hole (53) is formed in the lower end of the second pressing plate (51), a third pressing plate (54) is arranged in the second mounting hole (53) in a sliding mode, the third pressing plate (54) is L-shaped, a first spring (55) is arranged at the upper end of the third pressing plate (54), one end of the first spring (55) is fixedly connected with the inner wall of the upper end of the second mounting hole (53), the other end of the first spring (55) is fixedly connected with the upper end of the third pressing plate (54), one end, far away from the first spring (55), of the third pressing plate (54) extends to the outside of the second mounting hole (53) and is provided with a cutting knife (56), and the cutting knife (56) is located below the first pressing plate (46);
the first mounting plate (57), the first mounting plate (57) is arranged on the lower surface of the left end of the first pressing plate (46), and the upper end of the first mounting plate (57) is fixedly connected with the lower surface of the first pressing plate (46);
the second mounting plate (58) is arranged on the lower surface of the right end of the second pressing plate (51), and the upper end of the second mounting plate (58) is fixedly connected with the lower surface of the second pressing plate (51);
the third motor (59) is arranged on the right side wall of the first mounting plate (57), a second stud (60) is arranged at the output end of the third motor (59), one end, far away from the third motor (59), of the second stud (60) is rotatably connected with the side wall of the second mounting plate (58), a sliding block (61) is connected to the second stud (60) in a threaded mode, and the upper surface of the sliding block (61) is connected with the lower surface of the first pressing plate (46) in a sliding mode;
the connecting column (62) is arranged at the lower end of the sliding block (61), the upper end of the connecting column (62) is fixedly connected with the lower end of the sliding block (61), one end, far away from the sliding block (61), of the connecting column (62) is provided with a third mounting hole (63), a sliding column (64) is arranged in the third mounting hole (63) in a sliding mode, a second spring (65) is arranged at the upper end of the sliding column (64), one end of the second spring (65) is fixedly connected with the inner wall of the upper end of the third mounting hole (63), and the other end of the second spring (65) is fixedly connected with the upper end of the sliding column (64);
fourth clamp plate (66), fourth clamp plate (66) set up and are in slip post (64) is kept away from second spring (65) one end, fourth clamp plate (66) upper surface with slip post (64) lower extreme fixed connection, fourth clamp plate (66) are located limiting plate (32) upper right side.
CN202111336947.6A 2021-11-12 2021-11-12 Circuit substrate for new energy automobile and preparation method thereof Active CN113923858B (en)

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CN202111336947.6A CN113923858B (en) 2021-11-12 2021-11-12 Circuit substrate for new energy automobile and preparation method thereof

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CN113923858B true CN113923858B (en) 2022-06-07

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS531763B2 (en) * 1971-12-21 1978-01-21
JP4476428B2 (en) * 2000-04-21 2010-06-09 株式会社東芝 Aluminum nitride circuit board and manufacturing method thereof
JP2009215142A (en) * 2008-03-13 2009-09-24 Hitachi Metals Ltd Silicon nitride substrate, method for producing the same, silicon nitride circuit board using the same, and semiconductor module
CN105503199A (en) * 2015-12-30 2016-04-20 山东大学 High-heat conductivity silicon nitride-aluminum nitride composite material and preparation method thereof

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