CN211828885U - Self-tapping nail connecting structure of steel-aluminum composite bottom plate of battery box body - Google Patents
Self-tapping nail connecting structure of steel-aluminum composite bottom plate of battery box body Download PDFInfo
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- CN211828885U CN211828885U CN202020293921.2U CN202020293921U CN211828885U CN 211828885 U CN211828885 U CN 211828885U CN 202020293921 U CN202020293921 U CN 202020293921U CN 211828885 U CN211828885 U CN 211828885U
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- 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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Abstract
The utility model discloses a battery box steel aluminium composite bottom plate self tapping nail connection structure, including the composite bottom plate body, the composite bottom plate body includes the aluminium sheet layer, steel deck and aluminium anticorrosive coating, composite bottom plate body surface has the convex closure, there is first gluey groove of overflowing both sides, there is first sealed glue in the first gluey inslot of overflowing, the composite bottom plate body has the second to overflow gluey groove all around, there is the second sealed glue in the second gluey inslot of overflowing, the composite bottom plate body is organized at the frame through first sealed glue and the sealed sticky connection of second, there is the bottom hole frame group all around and in the middle crossbeam, also there is the bottom hole on the composite bottom plate body, the self tapping nail passes frame group and composite bottom plate body bottom hole and carries out self tapping operation and organizes locking composite bottom plate body and frame. In this way, the utility model discloses battery box steel-aluminum composite bottom plate self tapping nail connection structure adopts rubber coating and self tapping nail screw thread riveting to accomplish being connected of steel-aluminum composite board and frame group, and the rubber coating adds self tapping screw thread efficient, but the batchization, and the automation line feasibility is high.
Description
Technical Field
The utility model relates to an automobile spare and accessory part technical field especially relates to a battery box steel aluminium composite bottom plate self tapping nail connection structure.
Background
The steel-aluminum composite plate is one kind of metal composite plate, and the composite plate is synthesized by rolling different metals, and is a plate with wider application field.
The steel-aluminum composite board has the comprehensive properties of mechanical property of steel and corrosion resistance, high electrical conductivity, high thermal conductivity and the like of aluminum alloy; the bimetal composite material is one of laminated composite materials, and is a metal material formed by layering and combining two or more metal materials with different physical and chemical properties by utilizing respective performance advantages, and the obtained composite plate has comprehensive properties which cannot be possessed by any group of elements. The method mainly has the following characteristics: the use cost of the material is reduced; certain special mechanical properties are satisfied; physical properties and the like; the requirements of forming performance and appearance quality; can be used as special functional material, such as heat-sensitive metal; the welding problem of abnormal metal is solved.
The steel-aluminum composite plate is applied to an automobile body, a decorating part and a rear bumper, and can be completely applied to a bottom plate of a battery box body according to the characteristics of the steel-aluminum composite plate.
In recent years, the new energy automobile industry is rapidly developed, and aluminum extruded sections are widely applied to new energy automobile battery trays, so that the lightweight level of the whole new energy automobile is improved.
Battery box structure among the prior art, what the frame adopted is the aluminium alloy, wherein bottom plate scheme one: the structure of the bottom plate is mostly a double-layer hollow section bottom plate 1', a plurality of bottom plates are formed by welding double-sided FSW, some small bottom plates are the same in design, and the width of each small bottom plate is different, or the bottom plate is provided with a cross beam structure, the total thickness is 10mm, basically the structure is as shown in figures 1-3, the FSW process is reliable, but the structure adopts hollow sections, the size of the structure is different, the number of the small bottom plates is 2-7, the large bottom plates are welded into a large plate by stirring, and then FSW is welded on the whole frame, and the defects are that the number of the sections is large, the FSW welding amount is large, the welding path is long, the total welding time is 30-60 minutes, and;
the second bottom plate scheme: as shown in the attached figure 4, because the single-layer aluminum plate 1' has insufficient strength and poor tensile property, the single-layer aluminum plate is only used as a protection plate, so that the material is changed into a steel plate, the single-layer 1mm high-strength steel plate is heavy, and meanwhile, the single-layer 1mm high-strength steel plate needs to be subjected to anticorrosion surface treatment.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a battery box steel-aluminum composite bottom plate self tapping nail connection structure, can reduce the weight of battery box bottom plate, saves box inner space, and steel-aluminum composite panel adopts rubber coating and self-tapping screw thread riveting to accomplish with being connected of frame group, and the rubber coating adds self-tapping screw thread efficient, but the mass, and the line feasibility is high in the automation of producing.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a battery box steel-aluminum composite bottom plate self tapping nail connection structure, includes: the composite bottom plate body comprises an aluminum plate layer, a steel plate layer compounded with the aluminum plate layer and an aluminum anticorrosive layer arranged at the bottom of the steel plate layer,
the surface of the composite bottom plate body is provided with a convex hull, two sides of the convex hull are provided with first glue overflowing grooves, first sealant is coated in the first glue overflowing grooves, the periphery of the composite bottom plate body is provided with second glue overflowing grooves, second sealant is coated in the second glue overflowing grooves, the composite bottom plate body is adhered to a frame group of the battery box body through first sealant and second sealant,
the bottom holes are formed in the cross beam group at the periphery of the frame group and in the middle of the frame group, the bottom holes are punched in the composite bottom plate body, and the self-tapping screws penetrate through the bottom holes in the frame group and the composite bottom plate body to perform self-tapping operation so as to lock and fix the composite bottom plate body and the frame group together.
In a preferred embodiment of the present invention, the aluminum plate layer is fixed by welding, and the thickness of the aluminum plate layer is 1mm, 1.5mm or 2 mm.
In a preferred embodiment of the present invention, the steel plate layer and the aluminum plate layer are formed by stamping, and the thickness of the steel plate layer is 0.3-0.5 mm.
In a preferred embodiment of the present invention, the thickness of the aluminum anti-corrosion layer is 0.2-0.5 mm.
In a preferred embodiment of the present invention, the total thickness of the composite bottom plate body is less than or equal to 3 mm.
In a preferred embodiment of the present invention, the composite bottom plate body is fast adhered to the beam assembly of the battery box frame assembly by the structural sealant in the first glue overflow groove, and the composite bottom plate body is fast adhered to the periphery of the battery box frame assembly by the structural sealant in the second glue overflow groove.
In a preferred embodiment of the present invention, the punching position of the bottom hole on the composite bottom plate body matches with the positions of the bottom hole on the side frame group and the middle cross beam group.
In a preferred embodiment of the present invention, the depth of the bottom hole matches with the length of the self-tapping screw, and the depth of the bottom hole is greater than the length of the self-tapping screw.
In a preferred embodiment of the present invention, the self-tapping teeth are blind holes.
The utility model has the advantages that: the utility model discloses battery box steel-aluminum composite bottom plate self tapping nail connection structure has reduced the weight of battery box bottom plate, has saved the box inner space, and steel-aluminum composite panel adopts rubber coating and self tapping nail screw riveting to accomplish with being connected of frame group, and the rubber coating adds self tapping screw thread efficient, but the mass, and the line feasibility height is produced in the automation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:
FIG. 1 is a front view of a preferred embodiment of a prior art hollow floor of a battery compartment;
FIG. 2 is a side view of a preferred embodiment of a prior art hollow floor of a battery case;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a schematic diagram of a preferred embodiment of a single aluminum plate in a battery case of the prior art;
FIG. 5 is a schematic structural view of a preferred embodiment of a battery case frame assembly according to the present invention;
FIG. 6 is an enlarged view of B in FIG. 5;
FIG. 7 is a schematic structural view of a preferred embodiment of the steel-aluminum composite bottom plate of the battery box of the present invention;
FIG. 8 is an enlarged view of C in FIG. 7;
fig. 9 is a schematic view of the self-tapping nail connecting structure of the steel-aluminum composite bottom plate of the battery box of the present invention;
FIG. 10 is an enlarged view of D in FIG. 9;
fig. 11 is a schematic view of a preferred embodiment of a self-tapping screw in the self-tapping screw connection structure of the steel-aluminum composite bottom plate of the battery box of the present invention;
the parts in the drawings are numbered as follows:
1', a hollow section bar bottom plate, 2', a friction stir welding seam, 1' single-layer aluminum plate,
1. the frame group, 2, crossbeam group, 3, bottom opening, 4, compound bottom plate body, 410, aluminium sheet layer, 420, steel deck, 430, aluminium anticorrosive coating, 5, convex closure, 6, first glue overflow groove, 7, second glue overflow groove, 8, self-tapping nail.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 to 11, an embodiment of the present invention includes:
the utility model provides a battery box steel-aluminum composite bottom plate self tapping nail connection structure, includes: the composite bottom plate comprises a composite bottom plate body 4, wherein the composite bottom plate body 4 comprises an aluminum plate layer 410, a steel plate layer 420 compounded with the aluminum plate layer 410 and an aluminum anti-corrosion layer 430 arranged at the bottom of the steel plate layer 420.
The total thickness of the composite bottom plate body 4 is less than or equal to 3mm, wherein the aluminum plate layer is arranged at the bottom of the battery box body, the aluminum plate layer 410 can be fixed in a welding mode, and the thickness of the aluminum plate layer 410 is 1mm, 1.5mm or 2mm and is mainly adjusted according to the weight requirement of the battery box body.
Preferably, the aluminum plate layer 410 is made of 6 series aluminum, and the general properties of the 6 series aluminum are as follows, such as 6063-T6: the tensile strength is more than or equal to 205MPa, the yield strength is more than or equal to 180MPa, and the elongation is more than or equal to 8 percent.
Steel deck 420 sets up in the middle, and steel deck 420 forms together through the punching press mode complex with aluminium slab layer 410, and steel deck 420's thickness is 0.3~0.5mm, according to the operation requirement of battery box, can adjust the thickness of steel deck.
Preferably, the steel deck 420 is made of a rigid material, and the properties of the steel deck material are as follows: the tensile strength is more than or equal to 470MPa, the yield strength is more than or equal to 420MPa, and the elongation is more than or equal to 17 percent.
The aluminum anticorrosive coating 430 is mainly used for isolating contact between steel and air at the bottom, and the thickness of the aluminum anticorrosive coating 430 is 0.2-0.5 mm. Of course, PVC stone-impact-proof glue can be sprayed in the battery box body, or surface treatment such as plastic spraying is adopted, and the process is consistent with the original battery box body process.
The performance of the composite material of the aluminum plate and the steel plate is far greater than that of a double-layer material, and the composite material can be used as a bottom plate of a battery box body.
A convex hull 5 is formed on the surface of the composite bottom plate body 4 in a stamping mode, first glue overflow grooves 6 are formed in two sides of the convex hull 5, and second glue overflow grooves 7 are formed in the periphery of the composite bottom plate body 4;
the first glue overflow groove 6 is internally coated with a first sealant, the second glue overflow groove 7 is internally coated with a second sealant, the first sealant adopts a structural sealant, the second sealant adopts a common sealant, and the composite bottom plate body 3 is adhered to the frame group 1 of the battery box body through the first sealant and the second sealant.
Specifically, the composite bottom plate body 4 is fast adhered to the beam group 2 of the battery box frame group 1 through the structural sealant in the first glue overflow groove 6, and the composite bottom plate body 4 is fast adhered to the periphery of the battery box frame group 1 through the sealant in the second glue overflow groove 7.
The self-tapping screw 8 penetrates through the frame group 1 and the bottom hole 3 on the composite bottom plate body 4 to perform self-tapping operation, so that the composite bottom plate body 4 and the frame group 1 are locked and fixed together.
The depth of the bottom hole 3 is matched with the length of the self-tapping screw 8, the depth of the bottom hole 3 is larger than the length of the self-tapping screw 8, and the self-tapping screw is a blind hole.
The self-tapping screw 8 is a threaded fastener which self-taps the mating female thread in a pre-drilled hole of a metallic or non-metallic material, has a high anti-loosening capability in combination and is removable due to its self-shaping or ability to tap the mating thread. Preferably, the self-tapping screw 8 can be a C-type self-tapping screw as shown in fig. 11, and can also be an F-type, H-type or Z-type self-tapping screw.
When 8 self-tapping screws are adopted for riveting: the frame group 1 is drilled with a bottom hole 3 in advance, the depth of the bottom hole 3 is processed according to the length of the selected automatic nail 8 and is larger than the length of the self-tapping nail 8, the self-tapping tooth is a blind hole, and meanwhile, the frame section at the position needs to be thickened to ensure that the frame section cannot be tapped through;
in addition, a bottom hole 3 needs to be punched in the composite bottom plate body 4, the composite bottom plate body 4 is adhered to the frame group 1 after the gluing is finished, and the riveting work is finished by adopting a self-tapping screw 8 to perform self-tapping operation.
The utility model discloses battery box steel aluminium composite bottom plate self tapping nail connection structure's beneficial effect is:
the steel-aluminum composite plate is used as the bottom plate of the battery box body, so that the weight of the bottom plate of the battery box body is reduced, and the internal space of the box body is saved;
the connection of the steel-aluminum composite board and the frame group is completed by gluing and self-tapping screw thread riveting, the gluing and self-tapping screw thread adding efficiency is high, the batch production can be realized, and the feasibility of an automatic production line is high.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.
Claims (9)
1. The utility model provides a battery box steel aluminium composite bottom plate self tapping nail connection structure which characterized in that includes: the composite bottom plate body comprises an aluminum plate layer, a steel plate layer compounded with the aluminum plate layer and an aluminum anticorrosive layer arranged at the bottom of the steel plate layer,
the surface of the composite bottom plate body is provided with a convex hull, two sides of the convex hull are provided with first glue overflowing grooves, first sealant is coated in the first glue overflowing grooves, the periphery of the composite bottom plate body is provided with second glue overflowing grooves, second sealant is coated in the second glue overflowing grooves, the composite bottom plate body is adhered to a frame group of the battery box body through first sealant and second sealant,
the bottom holes are formed in the cross beam group at the periphery of the frame group and in the middle of the frame group, the bottom holes are punched in the composite bottom plate body, and the self-tapping screws penetrate through the bottom holes in the frame group and the composite bottom plate body to perform self-tapping operation so as to lock and fix the composite bottom plate body and the frame group together.
2. The self-tapping nail connecting structure for the steel-aluminum composite bottom plate of the battery box body according to claim 1, wherein the aluminum plate layer is fixed in a welding mode, and the thickness of the aluminum plate layer is 1mm, 1.5mm or 2 mm.
3. The self-tapping nail connecting structure for the steel-aluminum composite bottom plate of the battery box body according to claim 1, wherein the steel plate layer and the aluminum plate layer are formed together in a composite mode through stamping, and the thickness of the steel plate layer is 0.3-0.5 mm.
4. The self-tapping nail connecting structure for the steel-aluminum composite bottom plate of the battery box body according to claim 1, wherein the thickness of the aluminum anticorrosive layer is 0.2-0.5 mm.
5. The self-tapping nail connecting structure of the steel-aluminum composite bottom plate of the battery box body as claimed in claim 1, wherein the total thickness of the composite bottom plate body is less than or equal to 3 mm.
6. The self-tapping connecting structure for the steel-aluminum composite bottom plate of the battery box body as claimed in claim 1, wherein the composite bottom plate body is fast adhered to the beam set of the battery box body frame set by the structural sealant in the first glue overflow groove, and the composite bottom plate body is fast adhered to the periphery of the battery box body frame set by the sealant in the second glue overflow groove.
7. The self-tapping connecting structure for the steel-aluminum composite bottom plate of the battery box body as claimed in claim 1, wherein the punching position of the bottom hole of the composite bottom plate body is matched with the positions of the bottom holes of the beam group around the frame group and in the middle of the frame group.
8. The self-tapping screw connecting structure of the steel-aluminum composite bottom plate of the battery box body as claimed in claim 1, wherein the depth of the bottom hole is matched with the length of the self-tapping screw, and the depth of the bottom hole is greater than the length of the self-tapping screw.
9. The self-tapping connecting structure for the steel-aluminum composite bottom plate of the battery box body as claimed in claim 1, wherein the self-tapping teeth are blind holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020293921.2U CN211828885U (en) | 2020-03-11 | 2020-03-11 | Self-tapping nail connecting structure of steel-aluminum composite bottom plate of battery box body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020293921.2U CN211828885U (en) | 2020-03-11 | 2020-03-11 | Self-tapping nail connecting structure of steel-aluminum composite bottom plate of battery box body |
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| Publication Number | Publication Date |
|---|---|
| CN211828885U true CN211828885U (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020293921.2U Active CN211828885U (en) | 2020-03-11 | 2020-03-11 | Self-tapping nail connecting structure of steel-aluminum composite bottom plate of battery box body |
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| CN (1) | CN211828885U (en) |
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