CN112009041A - Composite material honeycomb interlayer bottom guard plate of lower box body of battery pack and preparation method - Google Patents

Composite material honeycomb interlayer bottom guard plate of lower box body of battery pack and preparation method Download PDF

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Publication number
CN112009041A
CN112009041A CN202010940548.XA CN202010940548A CN112009041A CN 112009041 A CN112009041 A CN 112009041A CN 202010940548 A CN202010940548 A CN 202010940548A CN 112009041 A CN112009041 A CN 112009041A
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skin
honeycomb
battery pack
guard plate
composite material
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CN202010940548.XA
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Chinese (zh)
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董晓阳
唐昌伟
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Suzhou Yinxi New Energy Composite Materials Co ltd
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Suzhou Yinxi New Energy Composite Materials Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0036—Heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0076—Curing, vulcanising, cross-linking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/12—Pressure

Abstract

The invention discloses a composite material honeycomb sandwich bottom guard plate of a lower box body of a battery pack and a preparation method thereof. The composite material honeycomb sandwich bottom guard plate for the lower box body of the battery pack and the preparation method thereof can realize obvious weight reduction of the lower box body structure of the battery pack, improve the energy density of the battery pack and obviously improve the shock resistance of the bottom guard plate.

Description

Composite material honeycomb interlayer bottom guard plate of lower box body of battery pack and preparation method
Technical Field
The invention belongs to the technical field of battery box lower box body bottom guard plates, and particularly relates to a battery pack lower box body composite material honeycomb sandwich bottom guard plate and a preparation method thereof.
Background
The composite material has the advantages of high specific modulus, high specific strength, capability of integrally carrying out structural design and manufacturing and the like, the composite material becomes a lightweight first-choice material of the new energy electric automobile in the future, the new energy battery pack is used as a core technology of the new energy electric automobile, the key for restricting the development and popularization of the new energy electric automobile is realized, and the low-cost industrial mass production of the electric automobile is also a key index for the electric automobile to be comprehensively pushed to the market.
The continuous fiber reinforced resin matrix composite material is used for manufacturing the lower box body bottom protection plate of the electric automobile, which is a main means for improving the strength of the lower box body and reducing the weight of the battery pack, and the excellent heat insulation performance of the lower box body can protect the environmental temperature of the lower box body. The bottom protection plate structure of the battery pack in the market is usually formed by adopting a metal plate, but the weight of the metal plate bottom protection plate of the lower box body is heavy, so that the whole energy density of the battery pack can be seriously reduced; and the sheet metal material is the heat conduction material, and the heat insulating ability is poor, and in the in-service use in-process, need spraying PVC heat preservation coating on the panel beating covering in order to guarantee the inside ambient temperature of battery package, need carry out rust-resistant anticorrosive treatment simultaneously, the cost has been increased.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention aims to provide a composite material honeycomb sandwich bottom guard plate of a lower box body of a battery pack and a preparation method thereof.
In order to achieve the purpose and achieve the technical effect, the invention adopts the technical scheme that:
the utility model provides a backplate at bottom of box combined material honeycomb intermediate layer under battery package, backplate and lower box are detachable to be linked together at the bottom, backplate includes by lower supreme lower covering, latticed honeycomb core and the last covering that sets gradually at the bottom, covering and last covering splice with latticed honeycomb core respectively down, guarantee the rigidity of backplate at the bottom through latticed honeycomb core.
Furthermore, the latticed honeycomb core material is of a regular hexagon structure and is made of aluminum honeycombs or aramid honeycombs.
Furthermore, the width of the latticed honeycomb core material is 1.5 +/-0.2 m, the side length is 20 +/-0.5 mm, and the wall thickness is 0.3 +/-0.02 mm.
Further, the lower skin and the upper skin are respectively formed by die pressing of continuous fibers, and the continuous fibers are one or a combination of several of glass fibers, basalt fibers and carbon fibers.
Further, the method comprises the following steps:
s1, respectively forming a lower skin and an upper skin by adopting continuous fiber mould pressing;
s2, stretching the honeycomb into a grid shape by stretching, wherein the stretching tension is 50 +/-5N, the stretching speed is 1m +/-0.1 m/min, a grid-shaped honeycomb core material is obtained, and then the grid-shaped honeycomb core material is cut into the design outline size of the bottom protection plate;
s3, respectively machining the lower skin and the upper skin into an assembly size by adopting laser, wherein the machining power is 18 +/-0.2W, the machining speed is 3-3.5 m/min, and the glued surfaces of the lower skin and the upper skin are opposite and polished;
s4, mounting and fixing the lower skin on a curing tool, and positioning by using positioning pins;
s5, flatly paving the structural adhesive on the adhesive surface of the lower skin, and rolling by using a compression roller, wherein the rolling pressure is 10 +/-2N; then, mounting the cut latticed honeycomb core material on a lower skin, mounting an upper skin on the latticed honeycomb core material, and positioning by adopting positioning pins;
s6, preparing a vacuum bag, and curing the product obtained in the step S5 in a vacuum curing furnace at the curing temperature of 115 +/-5 ℃ for 20 +/-1 min, wherein the vacuum pressure is kept at 0.02 +/-0.005 MPa for the first 10 +/-1 min and at 0.1 +/-0.005 MPa for the second 10 +/-1 min to obtain the required bottom guard plate.
Further, in step S1, the molding process includes: curing at a curing temperature of 165 +/-5 ℃ for 10 +/-1 min by adopting a pressure of 250 +/-5T.
Further, in step S3, the adhesive surfaces of the lower skin and the upper skin are respectively polished with No. 360 abrasive paper, and are cleaned with 90% alcohol, and then cooled for 3-4 min for further use.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a composite material honeycomb sandwich bottom guard plate of a lower box body of a battery pack and a preparation method thereof. The composite material honeycomb sandwich bottom guard plate for the lower box body of the battery pack and the preparation method thereof can realize obvious weight reduction of the lower box body structure of the battery pack, improve the energy density of the battery pack and obviously improve the shock resistance of the bottom guard plate.
Drawings
FIG. 1 is a schematic structural view of a lower skin of the present invention;
FIG. 2 is a schematic structural view of a cellular honeycomb core of the present invention;
FIG. 3 is a schematic structural view of the upper skin of the present invention;
FIG. 4 is a schematic view of the structure of the bottom guard plate of the present invention;
FIG. 5 is a schematic cross-sectional view of a backplate of the present invention;
FIG. 6 is a schematic diagram of the structure of a honeycomb unit of the present invention;
wherein, 1-lower skin; 2-a grid-shaped honeycomb core material; 3, covering the skin; 4-assembly holes; 5-a structural adhesive; 6-bottom guard board.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings so that the advantages and features of the invention can be more easily understood by those skilled in the art, and the scope of the invention will be clearly and clearly defined.
As shown in fig. 1 to 6, a composite honeycomb sandwich bottom guard plate for a lower box of a battery pack comprises:
the lower skin 1 is used for providing the structural strength of the whole lower box body and protecting the sealing requirement, and the wall thickness of the lower skin 1 is 0.9 +/-0.1 mm;
the latticed honeycomb core material 2 is used for forming a high-rigidity structure, the honeycomb shape is regular six deformation, the latticed honeycomb core material 2 adopts aluminum honeycombs, aramid honeycombs and the like, the width is 1.5 +/-0.2 m, the side length d is 20 +/-0.1 mm, and the wall thickness t is 0.3 +/-0.02 mm;
the upper skin 3 is used for providing the structural strength of the whole lower box body and protecting the sealing requirement, and the wall thickness of the upper skin 3 is 0.9 +/-0.1 mm;
the assembling hole 4 is used for connecting the bottom guard plate 6 and the main frame of the lower box body, and the aperture is 7 +/-0.2 mm; a plurality of assembling holes 4 are formed in the periphery of the lower skin 1 and the upper skin 3 at positions corresponding to one another;
the structural adhesive 5 is used for respectively adhering the lower skin 1 and the upper skin 3 to the latticed honeycomb core material 2, and the structural adhesive 5 is in a glue film state and has the thickness of 0.3 +/-0.05 mm; the lower skin 1 and the upper skin 3 are respectively glued and connected with the latticed honeycomb core material 2 into a whole by adopting a structural adhesive 5, and are positioned through the assembly holes 4 to obtain a composite material honeycomb sandwich bottom guard plate 6 of the lower box body of the battery pack; the rigidity of backplate 6 at the bottom of the lower box is guaranteed to the honeycomb core, and lower covering 1 and last covering 3 are sealed whole lower box and are guaranteed intensity.
A preparation method of a composite material honeycomb interlayer bottom guard plate of a lower box body of a battery pack comprises the following steps:
s1, preparing a composite material lower skin 1 and an upper skin 3 by adopting a continuous fiber composite material mould pressing process, wherein the used continuous fibers comprise glass fibers, basalt fibers, carbon fibers and the like, the mould pressing process adopts 250T +/-5T pressure curing, the curing temperature is 165 +/-5 ℃, and the heat preservation time is 10 +/-1 min;
s2, stretching the honeycomb into an expanded latticed honeycomb core material 2 by stretching, wherein the stretching tension is 50 +/-5N, the stretching speed is 1 +/-0.1 m/min, and the latticed honeycomb core material 2 is cut into the design outline size of the bottom protection plate;
s3, respectively processing the lower skin 1 and the upper skin 3 into assembly sizes, processing by laser, wherein the processing power is 18 +/-0.2W, the processing speed is 3-3.5 m/min, and the gluing surfaces of the lower skin 1 and the upper skin 3 are opposite and polished: polishing the glued surfaces by using No. 360 abrasive paper, cleaning by using 90% alcohol, and cooling for 3-4 min;
s4, mounting and fixing the lower skin 1 on a curing fixture, inserting a positioning pin into the assembling hole 4 for positioning, wherein the aperture of the main positioning pin is 7 +/-0.02 mm, and the aperture of the auxiliary positioning pin is 7 +/-0.2 mm;
s5, flatly paving the structural adhesive 5 on the adhesive surface of the composite material lower skin 1, and rolling by using a compression roller, wherein the rolling pressure is 10 +/-2N; installing the cut latticed honeycomb core material 2 on the lower skin 1, installing the upper skin 3 on the latticed honeycomb core material 2, positioning by adopting positioning pins, and winding by adopting foaming glue around the positioning pins with the thickness of 2 circles;
s6, preparing a vacuum bag, and curing the product obtained in the step S5 in a vacuum curing furnace at the curing temperature of 115 +/-5 ℃ for 20 +/-1 min, wherein the vacuum pressure is kept at 0.02 +/-0.005 MPa for the first 10 +/-1 min and at 0.1 +/-0.005 MPa for the second 10 +/-1 min to obtain the bottom protection plate 6 of the battery pack lower box body with the honeycomb sandwich structure.
The parts of the invention not described in detail can be realized by adopting the prior art, and are not described herein.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (7)

1. The utility model provides a backplate at bottom of box combined material honeycomb intermediate layer under battery package, its characterized in that, backplate and lower box are detachable links together at the bottom, backplate at the bottom includes by lower skin, latticed honeycomb core and the last skin that sets gradually supreme down, down the skin with go up the skin and splice with latticed honeycomb core respectively, guarantee the rigidity of backplate at the bottom through latticed honeycomb core.
2. The battery pack lower box composite material honeycomb sandwich bottom guard plate as claimed in claim 1, wherein the latticed honeycomb core material is in a regular hexagon structure and is made of aluminum honeycomb or aramid fiber honeycomb.
3. The bottom guard plate of the composite material honeycomb sandwich of the battery pack lower box body as claimed in claim 1, wherein the width of the grid-shaped honeycomb core material is 1.5 ± 0.2m, the side length is 20 ± 0.5mm, and the wall thickness is 0.3 ± 0.02 mm.
4. The composite material honeycomb sandwich bottom guard plate for the lower box body of the battery pack as claimed in claim 1, wherein the lower skin and the upper skin are respectively formed by die pressing of continuous fibers, and the continuous fibers are one or a combination of several of glass fibers, basalt fibers and carbon fibers.
5. The preparation method of the battery pack lower box composite material honeycomb sandwich bottom guard plate according to any one of claims 1 to 4, characterized by comprising the following steps:
s1, respectively forming a lower skin and an upper skin by adopting continuous fiber mould pressing;
s2, stretching the honeycomb into a grid shape by stretching, wherein the stretching tension is 50 +/-5N, the stretching speed is 1m +/-0.1 m/min, a grid-shaped honeycomb core material is obtained, and then the grid-shaped honeycomb core material is cut into the design outline size of the bottom protection plate;
s3, respectively machining the lower skin and the upper skin into an assembly size by adopting laser, wherein the machining power is 18 +/-0.2W, the machining speed is 3-3.5 m/min, and the glued surfaces of the lower skin and the upper skin are opposite and polished;
s4, mounting and fixing the lower skin on a curing tool, and positioning by using positioning pins;
s5, flatly paving the structural adhesive on the adhesive surface of the lower skin, and rolling by using a compression roller, wherein the rolling pressure is 10 +/-2N; then, mounting the cut latticed honeycomb core material on a lower skin, mounting an upper skin on the latticed honeycomb core material, and positioning by adopting positioning pins;
s6, preparing a vacuum bag, and curing the product obtained in the step S5 in a vacuum curing furnace at the curing temperature of 115 +/-5 ℃ for 20 +/-1 min, wherein the vacuum pressure is kept at 0.02 +/-0.005 MPa for the first 10 +/-1 min and at 0.1 +/-0.005 MPa for the second 10 +/-1 min to obtain the required bottom guard plate.
6. The method for preparing the composite material honeycomb sandwich bottom guard plate of the battery pack lower box body according to claim 5, wherein in the step S1, the die pressing process comprises the following steps: curing at a curing temperature of 165 +/-5 ℃ for 10 +/-1 min by adopting a pressure of 250 +/-5T.
7. The method for preparing the composite material honeycomb sandwich bottom guard plate for the lower case of the battery pack according to claim 5, wherein in step S3, the adhesive surfaces of the lower skin and the upper skin are respectively polished by No. 360 sand paper, cleaned by 90% alcohol, and left to cool for 3-4 min for later use.
CN202010940548.XA 2020-09-09 2020-09-09 Composite material honeycomb interlayer bottom guard plate of lower box body of battery pack and preparation method Pending CN112009041A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116252523A (en) * 2023-02-20 2023-06-13 北京维盛复合材料有限公司 Composite material bottom guard board of lower box body of battery pack and preparation method

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CN102476475A (en) * 2010-11-30 2012-05-30 辽宁杰事杰新材料有限公司 Honeycomb-structure sheet material having fiber-reinforced thermoplastic skin and preparation method thereof
CN105856589A (en) * 2016-04-27 2016-08-17 航天材料及工艺研究所 Integrated molding method for high-temperature-resistant heat-insulation wave-transmissive radome with honeycomb interlayer C
CN109950443A (en) * 2019-03-26 2019-06-28 上海工程技术大学 A kind of power battery box for equation motorcycle race

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Publication number Priority date Publication date Assignee Title
CN102476475A (en) * 2010-11-30 2012-05-30 辽宁杰事杰新材料有限公司 Honeycomb-structure sheet material having fiber-reinforced thermoplastic skin and preparation method thereof
CN105856589A (en) * 2016-04-27 2016-08-17 航天材料及工艺研究所 Integrated molding method for high-temperature-resistant heat-insulation wave-transmissive radome with honeycomb interlayer C
CN109950443A (en) * 2019-03-26 2019-06-28 上海工程技术大学 A kind of power battery box for equation motorcycle race

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116252523A (en) * 2023-02-20 2023-06-13 北京维盛复合材料有限公司 Composite material bottom guard board of lower box body of battery pack and preparation method

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Application publication date: 20201201