CN217426958U - Tray with battery pack tray boundary beam structure - Google Patents

Abstract

The utility model discloses a tray with battery package tray boundary beam structure. Belongs to the field of new energy automobile parts, and consists of lifting lugs, spacer bushes, longitudinal beams, cross beams, end plates and function integration bottom plates. The utility model can meet the requirements of the battery pack tray on strength, rigidity and collision extrusion safety, and simultaneously reduce the weight of the tray to the maximum extent; in addition, the heat insulation performance of the functional integration tray material is good, the power consumption of a battery pack cooling system can be reduced, the loss of cold energy is reduced, meanwhile, the charge and discharge performance of the battery system in a low-temperature environment is improved, and the winter endurance mileage of an automobile is favorably improved; furthermore, the utility model discloses a boundary beam of high strength steel material forms a high strength rectangle frame structure around the integrated bottom plate of function, under the collision operating mode, has improved anti extrusion, the invasion ability of whole tray, further improves collision security. The utility model discloses metal battery package tray and combined material tray's characteristics have been hold concurrently.

Description

Tray with battery pack tray boundary beam structure

Technical Field

The utility model belongs to new energy automobile spare part field relates to a tray with battery package tray boundary beam structure, especially relates to a battery package tray boundary beam structure and has the tray of this structure.

Background

In the prior art, the battery pack tray is used as an important structural bearing and safety protection component of a new energy automobile battery system, so that the safety, the lightweight effect, the heat preservation effect, the energy density and the collision safety of the whole automobile are all greatly influenced, and meanwhile, the edge beam of the tray is used as a core bearing structure of the battery pack tray and plays a decisive role in the strength, the rigidity and the mode of the battery pack tray; at present, the mainstream battery pack tray is formed by welding an aluminum alloy section structure or a steel sheet metal structure, and the aluminum alloy structure tray has high cost and poor heat insulation effect; the tray with the steel sheet metal structure is heavy in weight, large in overall deformation after welding, poor in flatness, heavy in weight and poor in heat insulation effect, and in order to improve heat insulation performance, an additional heat insulation layer needs to be added outside the battery pack, so that complexity and cost of the tray are increased, and the limited Z-direction space of the tray of the battery pack is compressed; therefore, it is considered by those skilled in the art to solve the above problems.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a tray with battery package tray boundary beam structure.

The technical scheme is as follows: the utility model relates to a tray with a battery pack tray boundary beam structure, which comprises a cuboid functional integrated bottom plate (1-6),

longitudinal beams (1-3) are oppositely arranged on two long sides of the function integration bottom plates (1-6), and cross beams (1-4) are oppositely arranged on two short sides of the function integration bottom plates;

lifting lugs (1-1) are uniformly arranged on the longitudinal beams (1-3), and spacer bushes (1-2) are arranged on the lifting lugs (1-1); the lifting lugs (1-1) are connected with the spacer bushes (1-2) and the longitudinal beams (1-3).

Furthermore, beam overlapping edges (1-4/1) are arranged on the back sides of the joints of the beams (1-4) and the functional integration bottom plates (1-6),

first welding points (1-4-1) are uniformly distributed on the overlapping edges (1-4/1) of the cross beams.

Furthermore, the longitudinal beam (1-3) comprises an outer plate (1-3-1), a longitudinal beam diagonal support (1-3-2) arranged on one side of the outer plate (1-3-1) and a lower plate (1-3-3) arranged on the innermost side, and the extending ends of the outer plate (1-3-1), the longitudinal beam diagonal support (1-3-2) and the lower plate (1-3-3) are provided with longitudinal beam overlapping edges (1-3/1);

second welding points are uniformly distributed on the longitudinal beam overlapping edges (1-3/1).

Furthermore, an end plate (1-5) is arranged at one end of the cross beam (1-4) close to the functional integration bottom plate (1-6); the cross section of the end plate (1-5) is in a shape like a Chinese character ri, and the end plate and the cross beam (1-4) are reliably connected through a welding line (1-00-3).

Furthermore, the functional integration bottom plate (1-6) comprises an inner skin (1-6-1) close to one side of the outer plate (1-3-1), a heat insulation layer (1-6-2) is arranged on the other side of the inner skin (1-6-1), and an outer skin (1-6-3) is arranged on the other side of the heat insulation layer (1-6-2);

the inner skin (1-6-1) is of a plane structure, and the outer skin (1-6-3) is turned upwards to form a boss structure.

Furthermore, the functional integration bottom plates (1-6), the longitudinal beams (1-3) and the cross beams (1-4) are matched through overlapping edges;

coating structural adhesive (1-00-1) at the matching position of the three, wherein the thickness of the structural adhesive is 0.5-2 mm;

with fasteners (1-00-2) arranged to connect them.

Has the advantages that: compared with the prior art, the utility model has the characteristics that: the utility model discloses have metal battery package tray and combined material tray's advantage concurrently: 1. by compounding various materials and various processes, the respective advantages of different materials and different processes are fully exerted; 2. high-strength steel is used as a material of the boundary beam, nonmetal is used as a material of the functional integrated bottom plate, and the first-order natural frequency of the tray exceeds 40 Hz; the weight of the tray is reduced to the maximum extent while the requirements on the strength, the rigidity and the collision extrusion safety of the tray of the battery pack are met; compared with a steel tray, the light weight effect is over 20 percent, the whole weight is close to that of an aluminum alloy tray, but the cost is lower than that of the aluminum alloy tray; 3. the battery pack tray has excellent heat insulation performance, the heat conductivity coefficient of the functional integrated tray material is far lower than that of steel (more than 40W/m.K) and aluminum alloy (more than 150W/m.K), the heat insulation performance is good, the power consumption of a battery pack cooling system can be reduced, the loss of cold energy is reduced, meanwhile, the charge and discharge performance of the battery system in a low-temperature environment is improved, and the winter endurance mileage of an automobile is favorably improved; 4. The high-strength steel edge beam surrounds the functional integration bottom plate to form a high-strength rectangular frame structure, so that under the collision working condition, the extrusion resistance and the invasion resistance of the whole tray are improved, and the collision safety is further improved; 5. the functional composite bottom plate is made of high-damping materials, and meanwhile, the three-layer sandwich structure of the functional composite bottom plate has a better vibration damping effect, and vibration conduction attenuation is large, so that vibration inside the battery pack is reduced, and electric devices inside the battery pack are better protected; 6. the structural adhesive layer has the effects of connecting and buffering the functional composite bottom plate and the boundary beam, and the boundary beam is prevented from directly rubbing and extruding the functional composite bottom plate; the internal stress generated by the difference of the thermal expansion coefficients between different materials of the boundary beam and the functional composite bottom plate is relieved, and the torsional rigidity of the whole battery pack tray is improved; 7. the tray end plate with the section shaped like a Chinese character ri or B has better rigidity and instability resistance and better battery cell protection compared with the common rectangular section.

Drawings

FIG. 1 is a diagram of a tray assembly of a battery pack of the present invention;

FIG. 2 is a structural diagram of the tray boundary beam of the battery pack of the present invention;

FIG. 3 is a cross-sectional view of C-C1: 2 in FIG. 2;

FIG. 4 is a cross-sectional view of D-D1: 2 in FIG. 2;

fig. 5 is a cross-sectional view of a battery pack tray assembly according to the present invention;

FIG. 6 is a cross-sectional view A-A of FIG. 5;

FIG. 7 is a cross-sectional view I1: 1 of FIG. 6;

FIG. 8 is a cross-sectional view of B-B of FIG. 5;

in the figure, 1-1 is a lifting lug; 1-2 is a spacer sleeve;

1-3 is a longitudinal beam, 1-3/1 is a lap joint of the longitudinal beam, 1-3-1 is an outer plate, 1-3-2 is a diagonal bracing of the longitudinal beam, and 1-3-3 is a lower plate;

1-4 is a beam, 1-4/1 is a beam lap edge, and 1-4-1 is a first welding point;

1-5 are end plates;

1-6 is a functional integrated bottom plate, 1-6-1 is an inner covering, 1-6-2 is a heat-insulating layer, and 1-6-3 is an outer covering;

1-00-1 is structural adhesive, 1-00-2 is fastening piece, and 1-00-3 is welding seam.

Detailed Description

The present invention will be further described with reference to the following examples.

The utility model relates to a tray with a battery pack tray boundary beam structure, which comprises a cuboid functional integrated bottom plate 1-6,

longitudinal beams 1-3 are oppositely arranged on two long sides of the function integration bottom plates 1-6, and cross beams 1-4 are oppositely arranged on two short sides of the function integration bottom plates;

lifting lugs 1-1 are uniformly distributed on the longitudinal beams 1-3, and spacer bushes 1-2 are arranged on the lifting lugs 1-1; the lifting lugs 1-1 and the spacer bushes 1-2 are connected with the longitudinal beams 1-3.

Furthermore, beam overlapping edges 1-4/1 are arranged on the back side of the connection part of the beams 1-4 and the functional integration bottom plates 1-6,

first welding points 1-4-1 are uniformly distributed on the lap edges 1-4/1 of the cross beam.

Further, the longitudinal beam 1-3 comprises an outer plate 1-3-1, a longitudinal beam diagonal support 1-3-2 arranged on one side of the outer plate 1-3-1 and a lower plate 1-3-3 arranged on the innermost side, and longitudinal beam lap edges 1-3/1 are arranged at the extending ends of the outer plate 1-3-1, the longitudinal beam diagonal support 1-3-2 and the lower plate 1-3-3;

second welding points are uniformly distributed on the longitudinal beam overlapping edges 1-3/1.

Furthermore, an end plate 1-5 is also arranged on one end of the cross beam 1-4 close to the functional integration bottom plate 1-6; the cross section of the end plate 1-5 is in a shape like a Chinese character ri, and the end plate and the cross beam 1-4 are reliably connected through a welding line 1-00-3.

Further, the functional integration bottom plate 1-6 comprises an inner skin 1-6-1 close to one side of the outer plate 1-3-1, a heat insulation layer 1-6-2 is arranged on the other side of the inner skin 1-6-1, and an outer skin 1-6-3 is arranged on the other side of the heat insulation layer 1-6-2;

the inner skin 1-6-1 is a plane structure, and the outer skin 1-6-3 is turned upwards to form a boss structure.

Furthermore, the functional integration bottom plates 1-6, the longitudinal beams 1-3 and the cross beams 1-4 are matched through lap edges;

coating 1-00-1 of structural adhesive at the matching position of the three components, wherein the thickness of the structural adhesive is 0.5-2 mm;

with fasteners 1-00-2 arranged to connect them.

Specifically, as shown in fig. 1, fig. 1 is a battery pack tray assembly, which is composed of lifting lugs 1-1, spacer bushes 1-2, longitudinal beams 1-3, cross beams 1-4, end plates 1-5 and functional integrated bottom plates 1-6;

as shown in fig. 2-4, fig. 2-4 are the structure diagrams of the edge beam of the battery pack tray, the edge beam is composed of cross beams 1-4 and longitudinal beams 1-3, the cross section of the cross beam 1-4 is in a shape of a P formed by the characteristics of a rectangular belt with a cross beam overlapping edge 1-4/1,

arranging a first welding point 1-4-1 on a cross beam overlapping edge 1-4/1, wherein the length of the cross beam overlapping edge 1-4/1 is 5-100mm, and the section thickness is 1-3 mm;

the longitudinal beam 1-3 is composed of an outer plate 1-3-1, a longitudinal beam diagonal brace 1-3-2 and a lower plate 1-3-3, the overall shape of the cross section is Z-shaped,

the longitudinal beam 1-3 is provided with a longitudinal beam lap joint edge 1-3/1, the length of the longitudinal beam lap joint edge is 5-100mm, and the section is connected into a closed section through a second welding point arranged on the longitudinal beam 1-3;

the longitudinal beam 1-3 is also provided with a mounting hole for connecting the upper cover of the battery pack and a mounting lug hole for connecting the tray and the vehicle body;

as shown in fig. 5-8, fig. 5-8 are cross-sectional views of a battery pack assembly, showing the connection principle of each component of a tray of the battery pack, wherein a lifting lug 1-1 is connected with a spacer bush 1-2 and a longitudinal beam 1-3, a functional integration bottom plate 1-6 is connected with the longitudinal beam 1-3 and a cross beam 1-4 in a matching way through a lap joint edge, a structural adhesive 1-00-1 is coated at the matching part of the three, the thickness of the structural adhesive is 0.5-2mm, and meanwhile, a fastener 1-00-2 is arranged at the connecting part of the three to connect the structural adhesive and the cross beam;

as shown in fig. 5-7, fig. 5-7 is a structural diagram of a functional integrated bottom plate 1-6, which is composed of three layers, namely an inner skin 1-6-1, an insulating layer 1-6-2 and an outer skin 1-6-3;

the inner skin 1-6-1 is a plane structure, and the outer skin 1-6-3 is turned upwards to form a boss, so that the inner skin and the outer skin are locally compacted by the edge; in addition, according to the structure and the connection principle of the battery pack tray end plate 1-5 shown in fig. 6, the section of the end plate 1-5 is in a shape like a Chinese character ri, and the end plate and the cross beam 1-4 are reliably connected through welding seams 1-00-3.

In addition, according to the stress characteristics and performance requirements of the battery pack tray, different materials and structures are applied to different positions of the battery pack tray, the advantages of the respective materials and structures are fully exerted, and the battery pack tray is composed of four main parts, namely side beams (longitudinal beams 1-3 and cross beams 1-4), function integration bottom plates 1-6, end plates 1-5 and lifting lugs 1-1;

on the design of the whole stress, force transmission path and function of the battery pack tray, the weight bearing of the whole battery pack and the collision safety protection of the battery pack are mainly borne by the side beams, and the function integration bottom plates 1-6 bear partial load, so that the function of dispersing the load is mainly played, and the functions of heat preservation and sealing are also realized, the integration of a plurality of functions is realized, the weight is reduced, and the torsional rigidity of the whole tray is improved;

the edge beam is formed by rolling or stamping and bending, the edge beam is specifically composed of cross beams 1-4 and longitudinal beams 1-3, and the cross beams 1-4 and the longitudinal beams 1-3 jointly form an edge beam structure; the wall thickness of the cross beams 1-4 is designed to be 1mm-3 mm; the cross section of the cross beam 1-4 is rectangular, or a section of overlapping edge extends out on the basis of the rectangular cross section to form a P-shaped cross section, welding spots are arranged on the overlapping edge, the wall thickness of the longitudinal beam 1-3 is 1-3mm, the cross section of the longitudinal beam 1-3 is Z-shaped, the inner side of the longitudinal beam 1-3 is provided with a section of overlapping edge, the length of the overlapping edge is 10-100mm, the cross section of the longitudinal beam 1-3 is formed by combining two layers of plates or three layers of plates, the two layers of plates or the three layers of plates are connected together through the welding spots and continuous and intermittent seam welding, the outer side of the longitudinal beam 1-3 is provided with a group of mounting lug holes, and the number of the lug holes is 3-8; the lap joint edges are provided with welding spots or welding seams to form a closed section;

lifting lugs 1-1 are arranged below the ear holes of the longitudinal beams 1-3, and spacer bushes 1-2 are arranged on the lifting lugs 1-1; wherein, the basic shape of the lifting lug 1-1 is U-shaped;

a sandwich structure with a middle interlayer is selected on the structure of the functional integration bottom plate 1-6 and consists of three layers of structures, namely an inner skin 1-6-1, a heat preservation layer 1-6-2 and an outer skin 1-6-3, the thickness of the inner skin and the outer skin is 0.5-3mm, the thickness of the heat preservation layer 1-6-2 is 2-10mm, and the heat preservation layer 1-6-2 is made of a structural core material (structural foam and a honeycomb core material), so that heat preservation is realized, and the structural rigidity of the whole functional integration bottom plate 1-6 is improved; locally compacting the inner skin and the outer skin in the area where the skins are matched with the edge beam to realize edge sealing of the structure, wherein the integral structure of the function integration bottom plate 1-6 can be a flat plate structure with locally compacted edge skins or a basin-shaped structure with an upturned flange edge, and the function integration bottom plate 1-6 can be integrally molded or can be formed by single molding and then bonded to form an integral body;

coating structural adhesive 1-00-1 on the matching surface of the functional integrated bottom plate and the edge beam for bonding and matching with a fastener 1-00-2 for connection, wherein a layer 1-00-1 of the structural adhesive adopts structural adhesive with high shearing strength and high elasticity, the thickness of the adhesive layer is controlled between 0.5 mm and 2mm, and the structural adhesive is coated on the bonding surface through an adhesive gun or an automatic adhesive coating machine; the battery pack tray boundary beam is provided with a section of overlap edge characteristic, the length of the overlap edge can be adjusted according to the vehicle type and the length of the battery core,

the length of the lap joint edge is 5-100mm, the lap joint edge is matched with the functional integrated bottom plate 1-6, and the reliable connection of the tray boundary beam and the functional integrated bottom plate 1-6 is realized by coating 1-00-1 layers of structural adhesive on the lap joint edge and arranging 1-00-2 layers of fasteners;

the weight ratio of the lower bottom plate to the side beam is 1: 1-1: 6 or more;

the end plate 1-5 of tray adopts "day" style of calligraphy cross-section or "B" style of calligraphy cross-section, and cross-sectional thickness is at 1-2mm, and the ratio 2 of cross-sectional height and cross-sectional width: 1-5: 1, the end plates 1-5 and the edge beams are joined together by welding.

Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, a plurality of modifications and decorations without departing from the principle of the present invention should be considered as the protection scope of the present invention.

Claims (6)

1. A tray with a battery pack tray boundary beam structure is characterized by comprising a cuboid functional integrated bottom plate (1-6),

longitudinal beams (1-3) are oppositely arranged on two long sides of the function integration bottom plates (1-6), and cross beams (1-4) are oppositely arranged on two short sides of the function integration bottom plates;

lifting lugs (1-1) are uniformly distributed on the longitudinal beams (1-3), and spacer bushes (1-2) are arranged on the lifting lugs (1-1); the lifting lugs (1-1) are connected with the spacer bushes (1-2) and the longitudinal beams (1-3).

2. The tray with battery pack tray edge beam structure of claim 1,

beam overlapping edges (1-4/1) are arranged on the back sides of the joints of the beams (1-4) and the function integration bottom plates (1-6),

first welding points (1-4-1) are uniformly distributed on the overlapping edges (1-4/1) of the cross beams.

3. The tray with the battery pack tray edge beam structure as claimed in claim 1,

the longitudinal beam (1-3) comprises an outer plate (1-3-1), a longitudinal beam diagonal support (1-3-2) arranged on one side of the outer plate (1-3-1) and a lower plate (1-3-3) arranged on the innermost side, and longitudinal beam lap edges (1-3/1) are arranged at the extending ends of the outer plate (1-3-1), the longitudinal beam diagonal support (1-3-2) and the lower plate (1-3-3);

second welding points are uniformly distributed on the longitudinal beam overlapping edges (1-3/1).

4. The tray with battery pack tray edge beam structure of claim 1,

an end plate (1-5) is also arranged on one end of the cross beam (1-4) close to the functional integrated bottom plate (1-6); the cross section of the end plate (1-5) is in a shape like a Chinese character ri, and the end plate and the cross beam (1-4) are reliably connected through a welding line (1-00-3).

5. The tray with battery pack tray edge beam structure of claim 1,

the functional integrated bottom plate (1-6) comprises an inner skin (1-6-1) close to one side of an outer plate (1-3-1), a heat-insulating layer (1-6-2) is arranged on the other side of the inner skin (1-6-1), and an outer skin (1-6-3) is arranged on the other side of the heat-insulating layer (1-6-2);

the inner skin (1-6-1) is of a plane structure, and the outer skin (1-6-3) is turned upwards to form a boss structure.

6. A tray with a battery pack tray edge beam structure as claimed in any one of claims 1 or 4,

the functional integrated bottom plates (1-6), the longitudinal beams (1-3) and the cross beams (1-4) are matched through overlapping edges;

coating structural adhesive (1-00-1) at the matching position of the three, wherein the thickness of the structural adhesive is 0.5-2 mm;

and fasteners (1-00-2) are arranged to connect them.

Images