CN107201464A - A kind of electric automobile battery box preparation technology of use aluminum alloy materials - Google Patents

A kind of electric automobile battery box preparation technology of use aluminum alloy materials Download PDF

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Publication number
CN107201464A
CN107201464A CN201610573294.6A CN201610573294A CN107201464A CN 107201464 A CN107201464 A CN 107201464A CN 201610573294 A CN201610573294 A CN 201610573294A CN 107201464 A CN107201464 A CN 107201464A
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CN
China
Prior art keywords
mould
electric automobile
battery box
parts
casting
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CN201610573294.6A
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Chinese (zh)
Inventor
陈果
胡智信
王际东
李述刚
潘国松
关培尧
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北京诺飞新能源科技有限责任公司
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Priority to CN201610573294.6A priority Critical patent/CN107201464A/en
Publication of CN107201464A publication Critical patent/CN107201464A/en

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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00Pressure casting; Vacuum casting
    • B22D18/04Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/02Making alloys by melting
    • C22C1/026Alloys based on aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/12Alloys based on aluminium with copper as the next major constituent
    • C22C21/14Alloys based on aluminium with copper as the next major constituent with silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/12Alloys based on aluminium with copper as the next major constituent
    • C22C21/18Alloys based on aluminium with copper as the next major constituent with zinc
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0257Cases, jackets or wrappings characterised by the material
    • H01M2/0262Cases, jackets or wrappings characterised by the material for large-sized cells or batteries, batteries or cells for traction or motive power or standby power
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention discloses a kind of electric automobile battery box preparation technology of use aluminum alloy materials, its raw material is as follows by weight:80 90 parts of 0.4 0.9 parts of iron, 0.5 0.8 parts of titanium, 0.7 1.3 parts of zinc, 0.2 0.6 parts of silicon, 0.1 0.15 parts of titanium, 36 parts of nickel, 48 parts of copper, 13 parts of manganese and aluminium.A kind of electric automobile battery box preparation technology for use aluminum alloy materials that the present invention is provided, reasonable design mould structure eliminates mould internal stress, solve integral electric automobile batteries case mould heat distortion, the addition of strict control alloying element, by using process for low pressure casting and forming, so that production efficiency increases substantially and reduces maintenance cost, the electric automobile battery box being made by using aluminum alloy materials, alleviate the overall weight of electric automobile, the energy loss in electric automobile running is reduced, and improves the service life of battery case.

Description

A kind of electric automobile battery box preparation technology of use aluminum alloy materials

Technical field

The present invention relates to electric automobile battery box technical field, more particularly to a kind of electric automobile of use aluminum alloy materials Battery case preparation technology.

Background technology

In recent years, electric automobile is fast-developing, and the demand of battery case increases year by year, and the past, the part used sand casting Method is produced as a trial, and not only efficiency and production capacity are low, and quality does not reach requirement yet, and serious casting mold incompleteness, large area occurs in workpiece Shrinkage cavity, surface indentation is coarse, and size is unstable, and weight is overweight, and percent defective is high.By integrated technology Analysis of Economic Value, adopt It is preferred technical scheme with low pressure casting.Past heating is mainly natural gas open firing and external electrical heating, and external electricity adds Mold heat heating is slow, heat loss is big, is extremely difficult to desired temperature, open firing mold temperature is very uneven, and die deformation is very Greatly, ideal product is can not produce, die life is reduced.Battery case mould is huge, and maximum mould planar dimension is up to 2170mm Deflection is big after × 1430mm, heating, and the internal stress that deformation is produced makes unitary mould produce cracking, not only have impact on the essence of mould The life-span of mould is spent and reduced, directly scrapping for mould can be caused when serious.

The content of the invention

The invention aims to solve shortcoming present in prior art, and the one kind proposed uses aluminum alloy materials Electric automobile battery box preparation technology.

To achieve these goals, present invention employs following technical scheme:

A kind of electric automobile battery box preparation technology of use aluminum alloy materials, comprises the following steps:

S1:Raw material prepares:Its raw material is as follows by weight:0.4-0.9 parts of iron, 0.5-0.8 parts of titanium, 0.7-1.3 parts of zinc, silicon 0.2- 80-90 parts of 0.6 part, 0.1-0.15 parts of titanium, 3-6 parts of nickel, 4-8 parts of copper, 1-3 parts of manganese and aluminium;

S2:Prepare raw metal:The each component material of needs is weighed, qualified, the weight error produced in weighing process is matched It should be less than one thousandth;

S3:The cleaning of smelting furnace:Prepare the smelting furnace needed to use, the residue that the last time melting remained in smelting furnace is produced is clear Reason is clean, it is to avoid the residue degree melting in smelting furnace is impacted, and gives smelting furnace preheating, and preheating temperature is taken the photograph for 100-200 Between family name's degree;

S4:Aluminium is melted:Aluminum feedstock is put into smelting furnace and carries out melting, smelting temperature is controlled between 730-850 degrees Celsius, is melted It is standby after refining;

S5:Auxiliary material is melted:Fusing point according to iron, titanium, zinc, silicon, zinc, nickel, copper and manganese material is added sequentially to melting from high to low Melting is carried out in stove, and when each auxiliary material is added, the change of strict temperature control;

S6:Aluminium alloy is mixed:The mixed solution of aluminum solutions and the iron of S4 and S5 formation, titanium, zinc, silicon, zinc, nickel, copper and manganese it Between mix, be put into holding furnace standby;

S7:Mould is pre-processed:Increase the metallic paint of electric automobile battery box die surface, add the flowing of aluminum alloy melt Property, multiple spray paint, to cause the thickness of metallic paint as 0.5-0.7 millimeters;

S8:Mould is preheated:Heated and heated to electric automobile battery box mould by embedded-type electric so that electric automobile battery box mould The temperature of tool reaches 280-300 DEG C, and will be uniformly distributed in the reserved type cinclides of heating tube insertion mould, makes mould mould temperature everywhere Substantially it is consistent, improves exothermal efficiency and die life;

S9:Aluminium alloy is poured into a mould:During aluminium alloy is poured into a mould, the pouring temperature of aluminium alloy electric automobile batteries case is 730 DEG C -850 DEG C;

S10:Low pressure casting is molded:Low pressure casting is liquid metals is filled die cavity under pressure, to form the one of casting The method of kind, because pressure used is relatively low, so being called low pressure casting, its technical process is:In sealed holding furnace, it is passed through Dry compressed air, aluminium alloy liquid rises in the presence of gas pressure along stalk, steady by the cast gate on mould Ground enters die cavity, and keeps the gas pressure in crucible on liquid level, until untill casting solidification completely, then releasing on liquid level Gas pressure, not solidified molten metal in liquid pipe is flowed back in holding furnace, then by hydraulic cylinder open form and release battery case casting Part;

(1) rise hydraulic coupling and rise the liquid time

Rise hydraulic coupling and the liter liquid time refers to when metal bath surface rises to cast gate by stalk, not yet into the attached institute of mold cavity The pressure needed and time, the rate of climb of the molten metal in stalk should be as slow as possible, to be conducive to type intracavity gas Discharge, while can also make molten metal to produce splash when entering cast gate, it is 550 millis that liquid meter pressure is risen during real work Bar, rises 12 seconds liquid time;

(2) dwell time

Cavity pressure is increased to after crystallization pressure, and is kept for a period of time under crystallization pressure, required for casting solidifies completely Time cry the dwell time, if the dwell time is not enough, casting does not solidify with regard to release completely, and the molten metal in die cavity will be whole Or part is flowed back to, cause casting " owing casting " and scrap:If the dwell time is too long, cast gate residual is long, and this is not only reduced Technique recovery rate, but also cast gate " freezing " can be caused, casting is gone out type difficulty, therefore a suitable pressurize must be selected in production Time, pressurize meter pressure is 830 millibars, 750 seconds dwell times during real work;

S11:Cooling and mould unloading:Battery case casting takes out product by hydraulic cylinder open form mechanism and ejecting mechanism after pressurize;

S12:Treatment of details:The corner that material after electric automobile battery box mould molding has more is placed under repair, product is closed Lattice rate is controlled within the specific limits.

It is preferred that, the length of the electric automobile battery box mould is more than 1.5m, and is formed with 6 pieces of module mosaics, each Module is positioned with mould bases with four flat keys and mould bases, and intermodule stays 0.8mm expansion joints, and this method eliminates electric automobile battery box mould Have internal stress, solve integral electric automobile batteries case mould heat distortion, the electric automobile battery box mould as caused by internal stress The problem of tool cracking, it not only ensure that electric automobile battery box mould and die accuracy and extend die life.

It is preferred that, the silicon and aluminium formation eutectic, it is possible to increase the high temperature formative nature of aluminium alloy, the copper can be improved The mobility of aluminium alloy, tensile strength and hardness, the zinc can improve mobility in aluminium alloy, increase red brittleness, the manganese The adverse effect of iron can be reduced in aluminium alloy, the service life of aluminium alloy, the addition aluminium alloy energy of the micro titanium is improved The grain structure of notable refining aluminum alloy, improves the mechanical performance of alloy, drops low-alloyed hot cracking tendency, the nickel is in aluminium alloy It is middle to improve the intensity and hardness of alloy, reduce corrosion resistance.

A kind of electric automobile battery box preparation technology for use aluminum alloy materials that the present invention is provided, eliminates mould planted agent Power, solves integral electric automobile batteries case mould heat distortion, the additional proportion of strict control alloying element, improves in material Portion's tissue morphology so that production efficiency increases substantially and reduces maintenance cost, the electricity being made by using aluminum alloy materials Electrical automobile battery case, improves the service life of electric automobile battery box.

Embodiment

In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with specific embodiment, to this Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not For limiting the present invention.

Embodiment 1

A kind of electric automobile battery box preparation technology of use aluminum alloy materials, comprises the following steps:

S1:Raw material prepares:Its raw material is as follows by weight:0.4 part of iron, 0.5 part of titanium, 0.7 part of zinc, 0.2 part of silicon, 0.1 part of titanium, nickel 80 parts of 3 parts, 4 parts of copper, 1 part of manganese and aluminium;

S2:Prepare raw metal:The each component material of needs is weighed, qualified, the weight error produced in weighing process is matched It should be less than one thousandth;

S3:The cleaning of smelting furnace:Prepare the smelting furnace needed to use, the residue that the last time melting remained in smelting furnace is produced is clear Reason is clean, it is to avoid the residue degree melting in smelting furnace is impacted, and gives smelting furnace preheating, and preheating temperature is taken the photograph for 100-200 Between family name's degree;

S4:Aluminium is melted:Aluminum feedstock is put into smelting furnace and carries out melting, smelting temperature is controlled between 730-850 degrees Celsius, is melted It is standby after refining;

S5:Auxiliary material is melted:Fusing point according to iron, titanium, zinc, silicon, zinc, nickel, copper and manganese material is added sequentially to melting from high to low Melting is carried out in stove, and when each auxiliary material is added, the change of strict temperature control;

S6:Aluminium alloy is mixed:The mixed solution of aluminum solutions and the iron of S4 and S5 formation, titanium, zinc, silicon, zinc, nickel, copper and manganese it Between mix, be put into holding furnace standby;

S7:Mould is pre-processed:Increase the metallic paint of electric automobile battery box die surface, add the flowing of aluminum alloy melt Property, multiple spray paint, to cause the thickness of metallic paint as 0.5-0.7 millimeters;

S8:Mould is preheated:Heated and heated to electric automobile battery box mould by embedded-type electric so that electric automobile battery box mould The temperature of tool reaches 280-300 DEG C, and will be uniformly distributed in the reserved type cinclides of heating tube insertion mould, makes mould mould temperature everywhere Substantially it is consistent, improves exothermal efficiency and die life;

S9:Aluminium alloy is poured into a mould:During aluminium alloy is poured into a mould, the pouring temperature of aluminium alloy electric automobile batteries case is 730 DEG C -850 DEG C;

S10:Low pressure casting is molded:Low pressure casting is liquid metals is filled die cavity under pressure, to form the one of casting The method of kind, because pressure used is relatively low, so being called low pressure casting, its technical process is:In sealed holding furnace, it is passed through Dry compressed air, aluminium alloy liquid rises in the presence of gas pressure along stalk, steady by the cast gate on mould Ground enters die cavity, and keeps the gas pressure in crucible on liquid level, until untill casting solidification completely, then releasing on liquid level Gas pressure, not solidified molten metal in liquid pipe is flowed back in holding furnace, then by hydraulic cylinder open form and release battery case casting Part;

(1) rise hydraulic coupling and rise the liquid time

Rise hydraulic coupling and the liter liquid time refers to when metal bath surface rises to cast gate by stalk, not yet into the attached institute of mold cavity The pressure needed and time, the rate of climb of the molten metal in stalk should be as slow as possible, to be conducive to type intracavity gas Discharge, while can also make molten metal to produce splash when entering cast gate, it is 550 millis that liquid meter pressure is risen during real work Bar, rises 12 seconds liquid time;

(2) dwell time

Cavity pressure is increased to after crystallization pressure, and is kept for a period of time under crystallization pressure, required for casting solidifies completely Time cry the dwell time, if the dwell time is not enough, casting does not solidify with regard to release completely, and the molten metal in die cavity will be whole Or part is flowed back to, cause casting " owing casting " and scrap:If the dwell time is too long, cast gate residual is long, and this is not only reduced Technique recovery rate, but also cast gate " freezing " can be caused, casting is gone out type difficulty, therefore a suitable pressurize must be selected in production Time, pressurize meter pressure is 830 millibars, 750 seconds dwell times during real work;

S11:Cooling and mould unloading:Battery case casting takes out product by hydraulic cylinder open form mechanism and ejecting mechanism after pressurize;

S12:Treatment of details:The corner that material after electric automobile battery box mould molding has more is placed under repair, product is closed Lattice rate is controlled within the specific limits.

Embodiment 2

A kind of electric automobile battery box preparation technology of use aluminum alloy materials, comprises the following steps:

S1:Raw material prepares:Its raw material is as follows by weight:0.7 part of iron, 0.65 part of titanium, 1 part of zinc, 0.4 part of silicon, 0.13 part of titanium, nickel 85 parts of 4.5 parts, 6 parts of copper, 2 parts of manganese and aluminium;

S2:Prepare raw metal:The each component material of needs is weighed, qualified, the weight error produced in weighing process is matched It should be less than one thousandth;

S3:The cleaning of smelting furnace:Prepare the smelting furnace needed to use, the residue that the last time melting remained in smelting furnace is produced is clear Reason is clean, it is to avoid the residue degree melting in smelting furnace is impacted, and gives smelting furnace preheating, and preheating temperature is taken the photograph for 100-200 Between family name's degree;

S4:Aluminium is melted:Aluminum feedstock is put into smelting furnace and carries out melting, smelting temperature is controlled between 730-850 degrees Celsius, is melted It is standby after refining;

S5:Auxiliary material is melted:Fusing point according to iron, titanium, zinc, silicon, zinc, nickel, copper and manganese material is added sequentially to melting from high to low Melting is carried out in stove, and when each auxiliary material is added, the change of strict temperature control;

S6:Aluminium alloy is mixed:The mixed solution of aluminum solutions and the iron of S4 and S5 formation, titanium, zinc, silicon, zinc, nickel, copper and manganese it Between mix, be put into holding furnace standby;

S7:Mould is pre-processed:Increase the metallic paint of electric automobile battery box die surface, add the flowing of aluminum alloy melt Property, multiple spray paint, to cause the thickness of metallic paint as 0.5-0.7 millimeters;

S8:Mould is preheated:Heated and heated to electric automobile battery box mould by embedded-type electric so that electric automobile battery box mould The temperature of tool reaches 280-300 DEG C, and will be uniformly distributed in the reserved type cinclides of heating tube insertion mould, makes mould mould temperature everywhere Substantially it is consistent, improves exothermal efficiency and die life;

S9:Aluminium alloy is poured into a mould:During aluminium alloy is poured into a mould, the pouring temperature of aluminium alloy electric automobile batteries case is 730 DEG C -850 DEG C;

S10:Low pressure casting is molded:Low pressure casting is liquid metals is filled die cavity under pressure, to form the one of casting The method of kind, because pressure used is relatively low, so being called low pressure casting, its technical process is:In sealed holding furnace, it is passed through Dry compressed air, aluminium alloy liquid rises in the presence of gas pressure along stalk, steady by the cast gate on mould Ground enters die cavity, and keeps the gas pressure in crucible on liquid level, until untill casting solidification completely, then releasing on liquid level Gas pressure, not solidified molten metal in liquid pipe is flowed back in holding furnace, then by hydraulic cylinder open form and release battery case casting Part;

(1) rise hydraulic coupling and rise the liquid time

Rise hydraulic coupling and the liter liquid time refers to when metal bath surface rises to cast gate by stalk, not yet into the attached institute of mold cavity The pressure needed and time, the rate of climb of the molten metal in stalk should be as slow as possible, to be conducive to type intracavity gas Discharge, while can also make molten metal to produce splash when entering cast gate, it is 550 millis that liquid meter pressure is risen during real work Bar, rises 12 seconds liquid time;

(2) dwell time

Cavity pressure is increased to after crystallization pressure, and is kept for a period of time under crystallization pressure, required for casting solidifies completely Time cry the dwell time, if the dwell time is not enough, casting does not solidify with regard to release completely, and the molten metal in die cavity will be whole Or part is flowed back to, cause casting " owing casting " and scrap:If the dwell time is too long, cast gate residual is long, and this is not only reduced Technique recovery rate, but also cast gate " freezing " can be caused, casting is gone out type difficulty, therefore a suitable pressurize must be selected in production Time, pressurize meter pressure is 830 millibars, 750 seconds dwell times during real work;

S11:Cooling and mould unloading:Battery case casting takes out product by hydraulic cylinder open form mechanism and ejecting mechanism after pressurize;

S12:Treatment of details:The corner that material after electric automobile battery box mould molding has more is placed under repair, product is closed Lattice rate is controlled within the specific limits.

Embodiment 3

A kind of electric automobile battery box preparation technology of use aluminum alloy materials, comprises the following steps:

S1:Raw material prepares:Its raw material is as follows by weight:0.9 part of iron, 0.8 part of titanium, 1.3 parts of zinc, 0.6 part of silicon, 0.15 part of titanium, 90 parts of 6 parts of nickel, 8 parts of copper, 3 parts of manganese and aluminium;

S2:Prepare raw metal:The each component material of needs is weighed, qualified, the weight error produced in weighing process is matched It should be less than one thousandth;

S3:The cleaning of smelting furnace:Prepare the smelting furnace needed to use, the residue that the last time melting remained in smelting furnace is produced is clear Reason is clean, it is to avoid the residue degree melting in smelting furnace is impacted, and gives smelting furnace preheating, and preheating temperature is taken the photograph for 100-200 Between family name's degree;

S4:Aluminium is melted:Aluminum feedstock is put into smelting furnace and carries out melting, smelting temperature is controlled between 730-850 degrees Celsius, is melted It is standby after refining;

S5:Auxiliary material is melted:Fusing point according to iron, titanium, zinc, silicon, zinc, nickel, copper and manganese material is added sequentially to melting from high to low Melting is carried out in stove, and when each auxiliary material is added, the change of strict temperature control;

S6:Aluminium alloy is mixed:The mixed solution of aluminum solutions and the iron of S4 and S5 formation, titanium, zinc, silicon, zinc, nickel, copper and manganese it Between mix, be put into holding furnace standby;

S7:Mould is pre-processed:Increase the metallic paint of electric automobile battery box die surface, add the flowing of aluminum alloy melt Property, multiple spray paint, to cause the thickness of metallic paint as 0.5-0.7 millimeters;

S8:Mould is preheated:Heated and heated to electric automobile battery box mould by embedded-type electric so that electric automobile battery box mould The temperature of tool reaches 280-300 DEG C, and will be uniformly distributed in the reserved type cinclides of heating tube insertion mould, makes mould mould temperature everywhere Substantially it is consistent, improves exothermal efficiency and die life;

S9:Aluminium alloy is poured into a mould:During aluminium alloy is poured into a mould, the pouring temperature of aluminium alloy electric automobile batteries case is 730 DEG C -850 DEG C;

S10:Low pressure casting is molded:Low pressure casting is liquid metals is filled die cavity under pressure, to form the one of casting The method of kind, because pressure used is relatively low, so being called low pressure casting, its technical process is:In sealed holding furnace, it is passed through Dry compressed air, aluminium alloy liquid rises in the presence of gas pressure along stalk, steady by the cast gate on mould Ground enters die cavity, and keeps the gas pressure in crucible on liquid level, until untill casting solidification completely, then releasing on liquid level Gas pressure, not solidified molten metal in liquid pipe is flowed back in holding furnace, then by hydraulic cylinder open form and release battery case casting Part;

(1) rise hydraulic coupling and rise the liquid time

Rise hydraulic coupling and the liter liquid time refers to when metal bath surface rises to cast gate by stalk, not yet into the attached institute of mold cavity The pressure needed and time, the rate of climb of the molten metal in stalk should be as slow as possible, to be conducive to type intracavity gas Discharge, while can also make molten metal to produce splash when entering cast gate, it is 550 millis that liquid meter pressure is risen during real work Bar, rises 12 seconds liquid time;

(4) dwell time

Cavity pressure is increased to after crystallization pressure, and is kept for a period of time under crystallization pressure, required for casting solidifies completely Time cry the dwell time, if the dwell time is not enough, casting does not solidify with regard to release completely, and the molten metal in die cavity will be whole Or part is flowed back to, cause casting " owing casting " and scrap:If the dwell time is too long, cast gate residual is long, and this is not only reduced Technique recovery rate, but also cast gate " freezing " can be caused, casting is gone out type difficulty, therefore a suitable pressurize must be selected in production Time, pressurize meter pressure is 830 millibars, 750 seconds dwell times during real work;

S11:Cooling and mould unloading:Battery case casting takes out product by hydraulic cylinder open form mechanism and ejecting mechanism after pressurize;

S12:Treatment of details:The corner that material after electric automobile battery box mould molding has more is placed under repair, product is closed Lattice rate is controlled within the specific limits.

A kind of electric automobile battery box preparation technology for use aluminum alloy materials that the present invention is provided, mould preheating is using embedding Enter formula electrical heating, heating tube inserted and is uniformly distributed in the reserved type cinclides of mould, making mould, mould temperature is consistent substantially everywhere, Exothermal efficiency and die life are improved, electric automobile battery box mould is formed with 2-6 block module mosaics, each module is used with mould bases Four flat keys are positioned with mould bases, and intermodule stays 0.8mm expansion joints, and this method eliminates mould internal stress, solves integral electric vapour Car battery case mould heat distortion, as caused by internal stress the problem of electric automobile battery box crack of die, not only ensure that electricity Electrical automobile battery case mould and die accuracy and electric automobile battery box die life is extended, BB1 is changed to by traditional circle guide pillar The mould geometric type heart is pointed in square guide pillar, cubic guide pillar, side, and both sides are front and rear respectively to stay 2.5mm gaps, increase top with H7/e8 is combined into The amount of floating of bar plate, is improved because deformation produces the phenomenon that push rod is killed, push rod fixed plate via is unilateral to stay gap 1mm, makes Push rod is solved with the linear movement produced by die cavity thermal expansion and push rod with the local interference problem that push rod fixed plate via is produced Certainly, in order to prevent excessive temperature differentials from causing workbench to have big difference with moving platen deflection, moving platen is prevented from normally moving up and down, Traditional guide pin bushing is changed to floating guide pin bushing, is engaged with moving platen rectangle via, increases amount of floating, solves moving platen and work The problem of making retard motion between platform, stainless steel strip is flexible coupling material as master tape, spreads and leads between master tape and Elema Electric cream, then with screw lock, because stainless steel fusing point is high, and electric conductivity is good, solves due to the too high fusing master tape of temperature The problem of, and conductive paste increases the contact area of master tape and Elema, and solving virtual connection sparking causes the fusing that is flexible coupling Situation so that production efficiency increases substantially and reduces maintenance cost.

The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto, Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.

Claims (3)

1. a kind of electric automobile battery box preparation technology of use aluminum alloy materials, it is characterised in that:Comprise the following steps:
S1:Raw material prepares:Its raw material is as follows by weight:0.4-0.9 parts of iron, 0.5-0.8 parts of titanium, 0.7-1.3 parts of zinc, silicon 0.2- 80-90 parts of 0.6 part, 0.1-0.15 parts of titanium, 3-6 parts of nickel, 4-8 parts of copper, 1-3 parts of manganese and aluminium;
S2:Prepare raw metal:The each component material of needs is weighed, qualified, the weight error produced in weighing process is matched It should be less than one thousandth;
S3:The cleaning of smelting furnace:Prepare the smelting furnace needed to use, the residue that the last time melting remained in smelting furnace is produced is clear Reason is clean, it is to avoid the residue degree melting in smelting furnace is impacted, and gives smelting furnace preheating, and preheating temperature is taken the photograph for 100-200 Between family name's degree;
S4:Aluminium is melted:Aluminum feedstock is put into smelting furnace and carries out melting, smelting temperature is controlled between 730-850 degrees Celsius, is melted It is standby after refining;
S5:Auxiliary material is melted:Fusing point according to iron, titanium, zinc, silicon, zinc, nickel, copper and manganese material is added sequentially to melting from high to low Melting is carried out in stove, and when each auxiliary material is added, the change of strict temperature control;
S6:Aluminium alloy is mixed:The mixed solution of aluminum solutions and the iron of S4 and S5 formation, titanium, zinc, silicon, zinc, nickel, copper and manganese it Between mix, be put into holding furnace standby;
S7:Mould is pre-processed:Increase the metallic paint of electric automobile battery box die surface, add the flowing of aluminum alloy melt Property, multiple spray paint, to cause the thickness of metallic paint as 0.5-0.7 millimeters;
S8:Mould is preheated:Heated and heated to electric automobile battery box mould by embedded-type electric so that electric automobile battery box mould The temperature of tool reaches 280-300 DEG C, and will be uniformly distributed in the reserved type cinclides of heating tube insertion mould, makes mould mould temperature everywhere Substantially it is consistent, improves exothermal efficiency and die life;
S9:Aluminium alloy pouring temperature:During aluminium alloy is poured into a mould, the pouring temperature of aluminium alloy electric automobile batteries case is 730 DEG C -850 DEG C;
S10:Low pressure casting is molded:Low pressure casting is liquid metals is filled die cavity under pressure, to form the one of casting The method of kind, because pressure used is relatively low, so being called low pressure casting, its technical process is:In sealed holding furnace, it is passed through Dry compressed air, aluminium alloy liquid rises in the presence of gas pressure along stalk, steady by the cast gate on mould Ground enters die cavity, and keeps the gas pressure in crucible on liquid level, until untill casting solidification completely, then releasing on liquid level Gas pressure, not solidified molten metal in liquid pipe is flowed back in holding furnace, then by hydraulic cylinder open form and release battery case casting Part;
(1) rise hydraulic coupling and rise the liquid time
Rise hydraulic coupling and the liter liquid time refers to when metal bath surface rises to cast gate by stalk, not yet into the attached institute of mold cavity The pressure needed and time, the rate of climb of the molten metal in stalk should be as slow as possible, to be conducive to type intracavity gas Discharge, while can also make molten metal to produce splash when entering cast gate, it is 550 millis that liquid meter pressure is risen during real work Bar, rises 12 seconds liquid time;
(2) dwell time
Cavity pressure is increased to after crystallization pressure, and is kept for a period of time under crystallization pressure, required for casting solidifies completely Time cry the dwell time, if the dwell time is not enough, casting does not solidify with regard to release completely, and the molten metal in die cavity will be whole Or part is flowed back to, cause casting " owing casting " and scrap:If the dwell time is too long, cast gate residual is long, and this is not only reduced Technique recovery rate, but also cast gate " freezing " can be caused, casting is gone out type difficulty, therefore a suitable pressurize must be selected in production Time, pressurize meter pressure is 830 millibars, 750 seconds dwell times during real work;
S11:Cooling and mould unloading:Battery case casting takes out product by hydraulic cylinder open form mechanism and ejecting mechanism after pressurize;
S12:Treatment of details:The corner that material after electric automobile battery box mould molding has more is placed under repair, product is closed Lattice rate is controlled within the specific limits.
2. the electric automobile battery box preparation technology of use aluminum alloy materials according to claim 1, it is characterised in that:Institute The length for stating electric automobile battery box mould is more than 1.5m, and is formed with 6 pieces of module mosaics, and each module is flat with four with mould bases Key is positioned with mould bases, and intermodule stays 0.8mm expansion joints, and this method eliminates electric automobile battery box mould internal stress, solves whole Body electric automobile battery box mould heat distortion, as caused by internal stress the problem of electric automobile battery box crack of die, not only It ensure that electric automobile battery box mould and die accuracy and extend die life.
3. the electric automobile battery box preparation technology of use aluminum alloy materials according to claim 1, it is characterised in that:Institute State silicon and aluminium formation eutectic, it is possible to increase the high temperature formative nature of aluminium alloy, the copper can improve the mobility of aluminium alloy, resist Tensile strength and hardness, the zinc can improve mobility in aluminium alloy, increase red brittleness, and the manganese can reduce iron in aluminium alloy Adverse effect, improve aluminium alloy service life, the micro titanium add aluminium alloy can significantly refining aluminum alloy crystalline substance Grain tissue, improves the mechanical performance of alloy, drops low-alloyed hot cracking tendency, and the nickel can improve the intensity of alloy in aluminium alloy And hardness, reduce corrosion resistance.
CN201610573294.6A 2016-07-21 2016-07-21 A kind of electric automobile battery box preparation technology of use aluminum alloy materials CN107201464A (en)

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CN107760162A (en) * 2017-11-01 2018-03-06 安徽安凯汽车股份有限公司 A kind of high-strength anti-corrosion type car battery case
CN107842418A (en) * 2017-11-09 2018-03-27 房县诚信汽配有限责任公司 A kind of automobile water inlet bend pipe and its forming method
CN107946492A (en) * 2017-12-07 2018-04-20 扬州市泽龙塑业有限公司 A kind of high intensity accumulator housing preparation method
CN108172713A (en) * 2017-12-24 2018-06-15 奇瑞新能源汽车技术有限公司 A kind of light-weight electric automobile battery system and preparation method thereof
CN108342627A (en) * 2018-05-14 2018-07-31 安徽和义新能源汽车充电设备有限公司 A kind of electric automobile battery box using aluminum alloy materials
CN110106402A (en) * 2019-05-24 2019-08-09 北京诺飞新能源科技有限责任公司 A kind of production technology of aluminum alloy battery
WO2020187942A1 (en) 2019-03-19 2020-09-24 Constellium Neuf-Brisach Battery box bottom part for electric vehicles

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CN104874766A (en) * 2015-05-21 2015-09-02 凤冈县凤鸣农用机械制造有限公司 Low-pressure casting method of thin-wall aluminum alloy part
CN204621054U (en) * 2015-04-27 2015-09-09 山东泰开精密铸造有限公司 New energy car battery casing punching block low pressure casting die
CN105127399A (en) * 2015-08-25 2015-12-09 来安县科来兴实业有限责任公司 Low-pressure casting technology for mounting tube socket of motor train unit brake system

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CN204144346U (en) * 2014-08-06 2015-02-04 东风汽车公司 Battery for electric automobile casing
CN204621054U (en) * 2015-04-27 2015-09-09 山东泰开精密铸造有限公司 New energy car battery casing punching block low pressure casting die
CN104874766A (en) * 2015-05-21 2015-09-02 凤冈县凤鸣农用机械制造有限公司 Low-pressure casting method of thin-wall aluminum alloy part
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107760162A (en) * 2017-11-01 2018-03-06 安徽安凯汽车股份有限公司 A kind of high-strength anti-corrosion type car battery case
CN107842418A (en) * 2017-11-09 2018-03-27 房县诚信汽配有限责任公司 A kind of automobile water inlet bend pipe and its forming method
CN107946492A (en) * 2017-12-07 2018-04-20 扬州市泽龙塑业有限公司 A kind of high intensity accumulator housing preparation method
CN108172713A (en) * 2017-12-24 2018-06-15 奇瑞新能源汽车技术有限公司 A kind of light-weight electric automobile battery system and preparation method thereof
CN108342627A (en) * 2018-05-14 2018-07-31 安徽和义新能源汽车充电设备有限公司 A kind of electric automobile battery box using aluminum alloy materials
WO2020187942A1 (en) 2019-03-19 2020-09-24 Constellium Neuf-Brisach Battery box bottom part for electric vehicles
FR3093960A1 (en) 2019-03-19 2020-09-25 Constellium Neuf-Brisach Lower part of battery box for electric vehicles
CN110106402A (en) * 2019-05-24 2019-08-09 北京诺飞新能源科技有限责任公司 A kind of production technology of aluminum alloy battery
CN110106402B (en) * 2019-05-24 2020-06-09 北京诺飞新能源科技有限责任公司 Production process of aluminum alloy battery box

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Application publication date: 20170926