CN113715363A - Rapid forming process for upper cover of composite material battery box - Google Patents
Rapid forming process for upper cover of composite material battery box Download PDFInfo
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- CN113715363A CN113715363A CN202111063488.9A CN202111063488A CN113715363A CN 113715363 A CN113715363 A CN 113715363A CN 202111063488 A CN202111063488 A CN 202111063488A CN 113715363 A CN113715363 A CN 113715363A
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- continuous glass
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000008569 process Effects 0.000 title claims abstract description 28
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 239000003365 glass fiber Substances 0.000 claims abstract description 172
- 239000000463 material Substances 0.000 claims abstract description 62
- 239000011521 glass Substances 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 45
- 239000003822 epoxy resin Substances 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 claims description 12
- 229920000647 polyepoxide Polymers 0.000 claims description 12
- 210000001503 joint Anatomy 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 6
- 238000011161 development Methods 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 abstract description 3
- 238000007493 shaping process Methods 0.000 abstract description 2
- 239000003677 Sheet moulding compound Substances 0.000 description 50
- 230000008901 benefit Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/345—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using matched moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/545—Perforating, cutting or machining during or after moulding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/155—Lids or covers characterised by the material
- H01M50/164—Lids or covers characterised by the material having a layered structure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a rapid forming process of an upper cover of a composite material battery box, which comprises a blanking machine, a laying mold, a press and a curing mold, wherein continuous glass fiber prepreg and glass fiber SMC sheet material are mixed and laid, the blanking machine is used for blanking the continuous glass fiber prepreg and the glass fiber SMC sheet material, then the continuous glass fiber prepreg and the glass fiber SMC sheet material are laid in the laying mold for performing preform laying, the laid preform is taken down and placed in the curing mold to be matched with the press for pressing and curing, and finally, the cured product is processed. Thereby solve the problem of shop's subsides efficiency, compromise the intensity requirement of battery box upper cover, possess the shaping efficiency of the fine SMC sheet stock of glass simultaneously.
Description
Technical Field
The invention belongs to the technical field of battery box cover manufacturing, and particularly relates to a rapid forming process for an upper cover of a composite material battery box.
Background
With the proposal of the national policy of carbon neutralization and carbon peak-reaching, the energy conservation and emission reduction of the automobile become effective ways, the new energy automobile becomes an important direction of national development, the usage amount of the battery box will be larger and larger, and the energy density of the battery becomes an important index of the power of the new energy automobile. Therefore, the weight of the battery box shell directly influences the energy density of the battery box, the lighter the battery box shell is, the higher the battery energy density is, and the higher the endurance mileage of the new energy automobile is.
At present, the upper cover of the battery box is made of metal materials mostly, and the battery box is formed by punching plates, so that the battery box is high in processing difficulty, heavy in weight and large in investment of four process production lines. The upper cover of part of the battery box is made of composite materials, the upper cover of the electric automobile is manufactured by using a continuous glass fiber prepreg PCM process, and the problems that the structure is complex, the paving efficiency is low, the material utilization rate is low, waste materials cannot be reused, manual paving is relied on, and the like exist. There are also lids made entirely of chopped strand reinforced unsaturated SMC sheet, but unsaturated SMC sheet has a low performance and therefore requires an increase in product thickness, resulting in insignificant weight reduction. The two modes are combined, but the SMC pre-form and the PCM pre-form need to be manufactured in advance, the two pre-forms are co-cured together, the forming process is complex, and one pre-forming die needs to be added and the pre-forming energy consumption needs to be increased for 2 times.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a rapid forming process for an upper cover of a composite material battery box, which adopts a mode of mixing and laying continuous glass fiber prepreg and glass fiber SMC (sheet molding compound) sheet material and adopts a laying mold to lay a preform, thereby solving the problem of laying efficiency, considering the strength requirement of the upper cover of the battery box and having the forming efficiency of the SMC sheet material.
In order to achieve the purpose, the technical scheme of the invention is as follows: a quick forming process for an upper cover of a composite material battery box comprises a blanking machine, a laying mold, a press and a curing mold, wherein continuous glass fiber prepreg and glass fiber SMC sheet materials are mixed and laid, the blanking machine is used for blanking the continuous glass fiber prepreg and the glass fiber SMC sheet materials, then the continuous glass fiber prepreg and the glass fiber SMC sheet materials are laid in the laying mold for preform laying, and the laid preform is taken down and placed in the curing mold and matched with the press for pressing and curing.
Further, the battery box upper cover includes the casing, and the casing is equipped with the flange all around, and four edges and corners department of casing is equipped with the edge, the curing mould includes formpiston and bed die, and formpiston, bed die and layer mould carry out the profile modeling design according to the battery box upper cover.
Furthermore, the composite material comprises a glass fiber felt prepreg, a glass fiber SMC sheet material and a continuous glass fiber prepreg, wherein the glass fiber SMC sheet material is laid on the glass fiber felt prepreg, and the continuous glass fiber prepreg is laid on the glass fiber SMC sheet material.
Further, the rapid prototyping process comprises the following specific steps:
the method comprises the following steps: preheating the male die and the female die to 150 +/-5 ℃ in advance;
step two: blanking, namely blanking the glass fiber SMC sheet material and the continuous glass fiber prepreg one by one according to a blanking development diagram, blanking the glass fiber felt prepreg and the continuous glass fiber prepreg which are additionally paved and stuck on the flange edge, and blanking by using an automatic blanking machine with the length of 2.5 m;
step three: paving and pasting the glass fiber felt prepreg, the glass fiber SMC sheet material and the continuous glass fiber prepreg cut in the second step on a paving mould, specifically, paving and pasting a layer of glass fiber felt prepreg at the flange edge of the paving mould, paving and pasting a layer of glass fiber SMC sheet material on the paving mould integrally, paving and pasting three layers of continuous glass fiber prepreg at the flange edge of the paving mould, and continuously paving and pasting one continuous glass fiber prepreg with the width of 30-50 mm at four corner positions to ensure the paving strength;
step four: finally, paving a continuous glass fiber prepreg layer on the whole of the laying mold, wherein the whole of the laying mold comprises a shell, flange edges and edges;
step five: spraying CLE-705 release agent on the heated male die and the heated female die for 2-3 times;
step six: taking down the pre-formed blank paved and stuck on the paving layer die and placing the pre-formed blank on the male die in the fifth step, closing the die, pressurizing the product to 5-15 MPa by adopting a press, and preserving heat for 4-6 min;
step seven: taking down the cured product on a clamp and clamping;
step eight: drilling and trimming by adopting a 6-axis manipulator;
step nine: and carrying out post-treatment such as polishing, paint spraying and the like on the product.
Furthermore, when the glass fiber mat prepreg and the continuous glass fiber prepreg which need to be additionally paved at the flange edge are blanked in the step two, the glass fiber mat prepreg and the continuous glass fiber prepreg are blanked into a square shape, and then are spliced and paved at the flange edge.
Furthermore, the blanking width of the glass fiber felt prepreg and the continuous glass fiber prepreg in the flange edge area is 5-10 mm wider than the actual width of the flange edge.
Further, when glass fiber SMC sheet materials are paved at the third step, the glass fiber SMC sheet materials at the edges and corners need to be lapped by 10-20 mm; when the continuous glass fiber prepreg is paved on the whole paving layer die, the continuous glass fiber prepreg is in butt joint paving at the edge.
Furthermore, when the flange edge is laid and pasted in the third step, as the glass fiber felt prepreg and the continuous glass fiber prepreg are both rectangular, each layer is provided with a butt joint, and the butt joints between the flange edge area laying layers and the laying layers are staggered by 100-150 mm, so that the product performance is prevented from being influenced in the same area.
Further, the continuous glass fiber prepreg is a material compounded by 0/90 biaxial glass cloth and an epoxy resin matrix, and comprises the following components in percentage by mass: 0/90 biaxial glass cloth accounts for 55 +/-3 percent, the epoxy resin matrix accounts for 45 +/-3 percent, and the single-layer thickness of the continuous glass fiber prepreg is 0.35 +/-0.05 mm.
Further, the glass fiber SMC sheet material is a chopped glass fiber reinforced epoxy resin matrix composite material and comprises the following components in percentage by mass: the weight of the chopped glass fibers is 50 +/-3 percent, the epoxy resin matrix is 50 +/-3 percent, the length of the chopped fibers is mixed by 1 inch and 2 inches, the mass ratio of the 2 inches is 1/3, the weight of the glass fiber SMC sheet material is 2 +/-3 percent kg per square meter, and the thickness is 0.8 +/-0.1 mm.
The technical scheme adopted by the invention has the advantages that:
1. the invention is formed by mixing and laying two states of fiber prepregs, develops respective advantages, can be understood as improvement on the scheme of the continuous glass fiber prepreg, the original laying angle is (0/90)/(+/-45)/(0/90) and is 3 layers in total, 2 layers of the continuous glass fiber prepreg is replaced by 1 layer of glass fiber SMC sheet material, 1 layer of laying working hours are reduced, meanwhile, the requirement of the glass fiber SMC sheet material on the laying precision is not high by the continuous glass fiber prepreg, partial laying working hours can be saved, the laying time of the prepreg of the whole battery box upper cover is reduced, the problem of long laying time of the pure glass fiber prepreg is solved, and simultaneously, 1 layer of the continuous glass fiber prepreg is kept, and the performance of the battery box upper cover can be ensured.
2. According to the invention, the continuous glass fiber prepreg and the glass fiber SMC sheet material are layered on the same layering mold, so that the problem that an SMC pre-forming structure needs to be completed in advance in the SMC and PCM process scheme adopted in the prior art is solved, a mold is omitted, and the manufacturing cost of the pre-forming body twice and the risk of layering after secondary combination are also omitted.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a development view of the present invention;
fig. 2 is a schematic view of the upper cover of the battery box of the present invention.
Detailed Description
In the present invention, it is to be understood that the term "length"; "Width"; "Up"; "Down"; "front"; "Back"; "left"; "Right"; "vertical"; "horizontal"; "Top"; "bottom" "inner"; "outer"; "clockwise"; "counterclockwise"; "axial"; "planar direction"; "circumferential" and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the indicated device or element must have a particular orientation; constructed and operative in a particular orientation and therefore should not be construed as limiting the invention.
As shown in fig. 1 and 2, a rapid molding process for an upper cover of a composite material battery box comprises a blanking machine, a laying-up mold, a press and a curing mold, wherein continuous glass fiber prepreg and glass fiber SMC sheet materials are mixed and laid, the blanking machine is used for blanking the continuous glass fiber prepreg and the glass fiber SMC sheet materials, then the continuous glass fiber prepreg and the glass fiber SMC sheet materials are laid in the laying-up mold for preform laying, the laid preform is taken down and placed in the curing mold and matched with the press for pressing and curing, and finally, the cured product is processed. Thereby solve the problem of shop's subsides efficiency, compromise the intensity requirement of battery box upper cover, possess the shaping efficiency of the fine SMC sheet stock of glass simultaneously.
The battery box upper cover includes casing 1, and casing 1 is equipped with flange 2 all around, and four edges and corners of casing 1 are equipped with edge 3, the curing mould includes formpiston and bed die, and formpiston, bed die and shop layer mould carry out the profile modeling design according to the battery box upper cover, need spread the shape of pasting continuous glass fibre preimpregnation material and the fine SMC sheet stock formation battery box upper cover on spreading the layer mould.
The composite material used in the invention comprises a glass fiber felt prepreg, a glass fiber SMC sheet material and a continuous glass fiber prepreg, wherein the glass fiber SMC sheet material is laid on the glass fiber felt prepreg, and the continuous glass fiber prepreg is laid on the glass fiber SMC sheet material.
The rapid forming process comprises the following specific steps:
the method comprises the following steps: preheating the male die and the female die to 150 +/-5 ℃ in advance;
step two: step two: blanking, namely blanking the glass fiber SMC sheet material and the continuous glass fiber prepreg one by one according to a blanking development diagram, blanking the glass fiber felt prepreg and the continuous glass fiber prepreg which are additionally paved and stuck on the flange edge, and blanking by using an automatic blanking machine with the length of 2.5 m; when glass fiber mat prepreg and continuous glass fiber prepreg which need to be additionally laid and adhered to the flange edge are blanked, the glass fiber mat prepreg and the continuous glass fiber prepreg are blanked into a square shape, and then are spliced and laid and adhered to the flange edge; the blanking width of the glass fiber felt prepreg and the continuous glass fiber prepreg in the flange edge area is 5-10 mm wider than the actual width of the flange edge.
Step three: paving and pasting the glass fiber felt prepreg, the glass fiber SMC sheet material and the continuous glass fiber prepreg cut in the second step on a paving mould, specifically, paving and pasting a layer of glass fiber felt prepreg at the flange edge of the paving mould, paving a layer of glass fiber SMC sheet material on the paving mould as a whole, paving and pasting three layers of continuous glass fiber prepreg at the flange edge of the paving mould, continuously paving and pasting one continuous glass fiber prepreg with the width of 30-50 mm at four edges and corners to ensure the paving strength, and paving a layer of continuous glass fiber prepreg on the whole paving mould, wherein the whole paving mould comprises a shell, the flange edge and the edges and corners; according to the invention, the layering ratio of the continuous glass fiber prepreg and the SMC sheet material on the main body structure is 1:1, the fluidity advantage of the SMC sheet material is exerted, the unreasonable layering ratio can cause wrinkles, the product performance and the appearance quality are reduced, the layering thickness is increased at the flange edge sealing surface, the flange edge strength and rigidity are ensured, and the sealing effect is prevented from being influenced by stress deformation.
When glass fiber SMC sheet materials are paved, overlapping the glass fiber SMC sheet materials at the corner 3 by 10-20 mm; when the whole of the laying layer die is paved with the continuous glass fiber prepreg, reinforcing cloth is added at the 3 continuous glass fiber prepreg butt joints at the edges and corners, so that the laying layer strength is ensured.
When the flange edge is paved, the glass fiber felt prepreg and the continuous glass fiber prepreg are both rectangular, so that each layer has a butt joint, and the butt joints between the paving layers of the flange edge area are staggered by 100-150 mm, so that the product performance is prevented from being influenced in the same area. Namely, the butt joint seam between the upper continuous glass fiber prepreg and the butt joint seam between the lower continuous glass fiber prepreg and the continuous glass fiber prepreg are staggered.
Step four: finally, paving a continuous glass fiber prepreg layer on the whole of the laying mold, wherein the whole of the laying mold comprises a shell, flange edges and edges;
step five: spraying CLE-705 release agent on the heated male die and the heated female die for 2-3 times;
step six: taking down the pre-formed blank paved and stuck on the paving layer die and placing the pre-formed blank on the male die in the fifth step, closing the die, pressurizing the product to 5-15 MPa by adopting a press, and preserving heat for 4-6 min;
step seven: taking down the cured product on a clamp and clamping;
step eight: drilling and trimming by adopting a 6-axis manipulator;
step nine: and carrying out post-treatment such as polishing, paint spraying and the like on the product.
The continuous glass fiber prepreg is a material compounded by 0/90 biaxial glass cloth and an epoxy resin matrix, and comprises the following components in percentage by mass: 0/90 biaxial glass cloth accounts for 55 +/-3 percent, the epoxy resin matrix accounts for 45 +/-3 percent, and the single-layer thickness of the continuous glass fiber prepreg is 0.35 +/-0.05 mm.
The glass fiber SMC sheet material is a chopped glass fiber reinforced epoxy resin matrix composite material and comprises the following components in percentage by mass: the weight of the chopped glass fibers is 50 +/-3 percent, the epoxy resin matrix is 50 +/-3 percent, the length of the chopped fibers is mixed by 1 inch and 2 inches, the mass ratio of the 2 inches is 1/3, the weight of the glass fiber SMC sheet material is 2 +/-3 percent kg per square meter, and the thickness is 0.8 +/-0.1 mm.
The invention is formed by mixing and laying two states of fiber prepregs, develops respective advantages, can be understood as improvement on the scheme of the continuous glass fiber prepreg, the original laying angle is (0/90)/(+/-45)/(0/90) and is 3 layers in total, 2 layers of the continuous glass fiber prepreg is replaced by 1 layer of glass fiber SMC sheet material, 1 layer of laying working hours are reduced, meanwhile, the requirement of the glass fiber SMC sheet material on the laying precision is not high by the continuous glass fiber prepreg, partial laying working hours can be saved, the laying time of the prepreg of the whole battery box upper cover is reduced, the problem of long laying time of the pure glass fiber prepreg is solved, and simultaneously, 1 layer of the continuous glass fiber prepreg is kept, and the performance of the battery box upper cover can be ensured.
Compared with a continuous glass fiber PCM process, the rapid forming process of the invention comprises the following steps: the product cost is reduced, the cost per square meter of 1 layer of 400 g of continuous glass fiber prepreg and 1 layer of glass fiber SMC sheet material is equivalent, and the cost of 1 layer of 200 g of continuous glass fiber prepreg is saved by adopting the scheme; the paving efficiency is improved, the requirements of the glass fiber SMC sheet materials on paving are relatively low, the requirements of the continuous glass fiber prepreg on paving are high, the paving working time can be saved by only replacing 1 layer of glass fiber SMC sheet materials, and the paving working time of 1 layer of continuous glass fiber prepreg is reduced. Compared with the unsaturated SMC sheet material die pressing process, the weight is reduced by more than 30 percent.
The continuous glass fiber prepreg and the glass fiber SMC sheet material are layered on the same layering mold, so that the problem that an SMC pre-forming structure needs to be completed in advance in the SMC and PCM process scheme in the prior art is solved, a middle mold is omitted, and the manufacturing cost of the pre-forming body twice and the risk of layering after secondary bonding are also omitted.
The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the technical solution of the invention or to apply the concept and technical solution of the invention directly to other occasions without modification.
Claims (10)
1. A rapid forming process for an upper cover of a composite material battery box is characterized by comprising the following steps: the continuous glass fiber prepreg and glass fiber SMC sheet material mixed laying method comprises a blanking machine, a laying mold, a press and a curing mold, wherein the continuous glass fiber prepreg and the glass fiber SMC sheet material mixed laying are adopted, the continuous glass fiber prepreg and the glass fiber SMC sheet material are firstly blanked through the blanking machine, then the continuous glass fiber prepreg and the glass fiber SMC sheet material are laid in the laying mold to be preformed and laid, and then the laid preformed blank is taken down and placed in the curing mold and matched with the press to be pressed and cured.
2. The rapid forming process of the composite material battery box upper cover according to claim 1, characterized in that: the battery box upper cover comprises a shell (1), flange edges (2) are arranged on the periphery of the shell (1), reinforcing areas are arranged at four edges and corners (3) of the shell (1), the curing mold comprises a male mold and a female mold, and the male mold, the female mold and a laying mold are designed in a copying mode according to the battery box upper cover.
3. The composite material battery box upper cover rapid molding process according to claim 2, characterized in that: the composite material comprises a glass fiber felt prepreg, a glass fiber SMC sheet material and a continuous glass fiber prepreg, wherein the glass fiber SMC sheet material is laid on the glass fiber felt prepreg, and the continuous glass fiber prepreg is laid on the glass fiber SMC sheet material.
4. The rapid forming process of the composite material battery box upper cover according to claim 3, characterized in that: the rapid forming process comprises the following specific steps:
the method comprises the following steps: preheating the male die and the female die to 150 +/-5 ℃ in advance;
step two: blanking, namely blanking the glass fiber SMC sheet material and the continuous glass fiber prepreg one by one according to a blanking development diagram, blanking the glass fiber felt prepreg and the continuous glass fiber prepreg which are additionally paved and stuck on the flange edge, and blanking by using an automatic blanking machine with the length of 2.5 m;
step three: paving and pasting the glass fiber felt prepreg, the glass fiber SMC sheet material and the continuous glass fiber prepreg cut in the second step on a paving mould, specifically, paving and pasting a layer of glass fiber felt prepreg at the flange edge of the paving mould, paving and pasting a layer of glass fiber SMC sheet material on the paving mould integrally, paving and pasting three layers of continuous glass fiber prepreg at the flange edge of the paving mould, and continuously paving and pasting one continuous glass fiber prepreg with the width of 30-50 mm at four corner positions to ensure the paving strength;
step four: finally, paving a continuous glass fiber prepreg layer on the whole of the laying mold, wherein the whole of the laying mold comprises a shell, flange edges and edges;
step five: spraying CLE-705 release agent on the heated male die and the heated female die for 2-3 times;
step six: taking down the pre-formed blank paved and stuck on the paving layer die and placing the pre-formed blank on the male die in the fifth step, closing the die, pressurizing the product to 5-15 MPa by adopting a press, and preserving heat for 4-6 min;
step seven: taking down the cured product on a clamp and clamping;
step eight: drilling and trimming by adopting a 6-axis manipulator;
step nine: and carrying out post-treatment such as polishing, paint spraying and the like on the product.
5. The rapid forming process of the composite material battery box upper cover as claimed in claim 4, characterized in that: and in the second step, when the glass fiber mat prepreg and the continuous glass fiber prepreg which need to be additionally paved and adhered to the flange edge are blanked, the glass fiber mat prepreg and the continuous glass fiber prepreg are blanked into a square shape, and then are spliced and paved and adhered to the flange edge.
6. The rapid forming process of the composite material battery box upper cover according to claim 5, characterized in that: the blanking width of the glass fiber felt prepreg and the continuous glass fiber prepreg in the flange edge area is 5-10 mm wider than the actual width of the flange edge.
7. The rapid forming process of the composite material battery box upper cover as claimed in claim 4, characterized in that: when glass fiber SMC sheet materials are paved at the third step, the glass fiber SMC sheet materials at the edges and corners (3) need to be lapped by 10-20 mm; when the continuous glass fiber prepreg is paved on the whole paving layer die, the continuous glass fiber prepreg is in butt joint paving at the corner (3).
8. The rapid forming process of the composite material battery box upper cover according to claim 5, characterized in that: when the flange edge is laid and pasted in the third step, as the blanking of the glass fiber felt prepreg and the continuous glass fiber prepreg is rectangular, each layer is provided with a butt joint, and the butt joints between the laying layers of the flange edge area are staggered by 100-150 mm, so that the product performance is prevented from being influenced in the same area.
9. The rapid forming process of the composite material battery box upper cover as claimed in claim 4, characterized in that: the continuous glass fiber prepreg is a material compounded by 0/90 biaxial glass cloth and an epoxy resin matrix, and comprises the following components in percentage by mass: 0/90 biaxial glass cloth accounts for 55 +/-3 percent, the epoxy resin matrix accounts for 45 +/-3 percent, and the single-layer thickness of the continuous glass fiber prepreg is 0.35 +/-0.05 mm.
10. The rapid forming process of the composite material battery box upper cover as claimed in claim 4, characterized in that: the glass fiber SMC sheet material is a chopped glass fiber reinforced epoxy resin matrix composite material and comprises the following components in percentage by mass: the weight of the chopped glass fibers is 50 +/-3 percent, the epoxy resin matrix is 50 +/-3 percent, the length of the chopped fibers is mixed by 1 inch and 2 inches, the mass ratio of the 2 inches is 1/3, the weight of the glass fiber SMC sheet material is 2 +/-3 percent kg per square meter, and the thickness is 0.8 +/-0.1 mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111063488.9A CN113715363B (en) | 2021-09-10 | 2021-09-10 | Rapid forming process for upper cover of composite material battery box |
| ZA2022/07408A ZA202207408B (en) | 2021-09-10 | 2022-07-05 | Rapid forming technology for composite battery box upper cover |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111063488.9A CN113715363B (en) | 2021-09-10 | 2021-09-10 | Rapid forming process for upper cover of composite material battery box |
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| CN113715363A true CN113715363A (en) | 2021-11-30 |
| CN113715363B CN113715363B (en) | 2023-01-06 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109353031A (en) * | 2018-11-19 | 2019-02-19 | 苏州银禧新能源复合材料有限公司 | The preparation method of battery box cover |
| CN112454941A (en) * | 2020-10-09 | 2021-03-09 | 许剑海 | Manufacturing process of composite material battery box |
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2021
- 2021-09-10 CN CN202111063488.9A patent/CN113715363B/en active Active
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- 2022-07-05 ZA ZA2022/07408A patent/ZA202207408B/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109353031A (en) * | 2018-11-19 | 2019-02-19 | 苏州银禧新能源复合材料有限公司 | The preparation method of battery box cover |
| CN112454941A (en) * | 2020-10-09 | 2021-03-09 | 许剑海 | Manufacturing process of composite material battery box |
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| Publication number | Publication date |
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| CN113715363B (en) | 2023-01-06 |
| ZA202207408B (en) | 2022-10-26 |
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