CN107302066B

CN107302066B - Battery shell and bottom plate assembly thereof

Info

Publication number: CN107302066B
Application number: CN201710417940.4A
Authority: CN
Inventors: 蒯振; 杨乐; 杨宇威; 武胜军
Original assignee: Beijing Electric Vehicle Co Ltd
Current assignee: Beijing Electric Vehicle Co Ltd
Priority date: 2017-06-06
Filing date: 2017-06-06
Publication date: 2021-01-22
Anticipated expiration: 2037-06-06
Also published as: CN107302066A

Abstract

The invention discloses a battery shell and a bottom plate component thereof, comprising: an aluminum plate; the aluminum plate includes: the front side, the back side and two side edges, a front corner edge is connected between the front side and the side edges, a back corner edge is connected between the side edges and the back side, and each side edge comprises: a front section, a rear section and a corner section connected between the front section and the rear section; the section bar roof beam, the section bar roof beam is a plurality of and fixes on aluminum plate, and a plurality of section bar roof beams are horizontal roof beam and vertical roof beam respectively, and a plurality of horizontal roof beams include: first to fourth transverse beams, the plurality of longitudinal beams including: first to fourth longitudinal beam, first longitudinal beam connect in the midpoint of first horizontal roof beam and to vertical front side extension, and the section bar roof beam is the shape of falling U and just includes interior aluminum plate, outer aluminum plate and reinforcing plate, and the reinforcing plate presss from both sides establishes fixedly including between aluminum plate and the outer aluminum plate. Through setting up aluminum plate and section bar roof beam, can reduce battery case's weight to can make battery case accord with the lightweight design requirement of vehicle.

Description

Battery shell and bottom plate assembly thereof

Technical Field

The invention relates to the technical field of vehicles, in particular to a bottom plate assembly of a battery shell and the battery shell with the bottom plate assembly.

Background

With the environmental pollution problem being more and more emphasized by the national people, vehicles using clean energy, such as electric vehicles, are rapidly developed. Batteries of electric vehicles are generally fixed in the chassis department of vehicle, and in order to guarantee battery module's fixed reliability, battery case generally chooses the higher material of structural strength to make, but battery module's weight is just very big itself, and the great battery case of weight leads to whole battery weight big in addition, increases the whole weight of vehicle, is unfavorable for the increase of mileage of traveling moreover.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides the bottom plate assembly of the battery shell, which is light in weight, good in structural strength and capable of meeting the light-weight design requirement of a vehicle.

The invention further provides a battery shell.

The bottom plate component of the battery shell according to the invention comprises an aluminum plate; the aluminum plate includes: the front side, back side and two sides, two sides are connected in the front side with the left and right sides of back, be connected with preceding corner limit between the front side with the side, be connected with back corner limit between the side with the back, every the side includes: a front section, a rear section and a corner section connected between the front section and the rear section; the section bar roof beam is a plurality of and fix on the aluminum plate, a plurality of section bar roof beams are a plurality of horizontal roof beams and a plurality of longitudinal beams respectively, a plurality of horizontal roof beams are vertical interval setting and the edge extends to side department, a plurality of horizontal roof beams include: first to fourth transverse beams, the plurality of longitudinal beams including: first to fourth longitudinal beams, the first longitudinal beam being connected at a midpoint of a first transverse beam and extending to a longitudinal front side, a plurality of second longitudinal beams being connected between the first transverse beam and the second transverse beam, a plurality of third longitudinal beams being connected between the second transverse beam and the third transverse beam, a plurality of fourth longitudinal beams being connected between the third transverse beam and the fourth transverse beam; wherein, the section bar roof beam is the shape of falling U and includes interior aluminum plate, outer aluminum plate and reinforcing plate, the reinforcing plate presss from both sides to establish to be fixed interior aluminum plate with between the outer aluminum plate.

According to the bottom plate assembly of the battery shell, the aluminum plate and the section bar beam are arranged, so that on one hand, the weight of the battery shell can be reduced, the battery shell can meet the light weight design requirement of a vehicle, and in addition, the bottom plate assembly is simple in structure and convenient to manufacture, and the manufacturability of the battery shell can be improved. Moreover, by arranging a plurality of transverse beams and a plurality of longitudinal beams reasonably, the section beams can divide the aluminum plate into a plurality of areas, each transverse beam or each longitudinal beam reinforces the area nearby, and the transverse beams and the longitudinal beams also have mutual reinforcement. In addition, the profile beam has the advantages of reliable structure and high strength, so that the reliability of the battery shell can be better improved.

In some examples of the present invention, the included angles between the front corner edge and the corner section and the front section are α 1 and α 2, respectively, and the included angle between the corner section and the rear section is α 3, wherein α 1 is 120 ° or more and α 2 is α 3 or more and 160 ° or less.

In some examples of the invention, the included angle between the rear corner edge and the rear edge is α 4, wherein 150 ≦ α 4 ≦ 180 °

In some examples of the invention, the distance between the first longitudinal beam and the front section of the side edge is n1, wherein 350mm n1 mm 450mm, and the distance between the first transverse beam and the front edge is m1, wherein 450mm m1 mm 550 mm.

In some examples of the invention, the distance between the first and second transverse beams is m2, the distance between the second and third transverse beams is m3, the distance between the third and fourth transverse beams is m4, and the distance from the fourth transverse beam to the rear edge is m5, wherein m2 is 300mm or less, m3 is m4 or less 400mm, and m5 is 50mm or less 100 mm.

In some examples of the invention, the plurality of longitudinal beams located between the two transverse beams are symmetrically distributed about the central axis of the aluminum plate.

In some examples of the invention, the second longitudinal beam is four, and the third longitudinal beam and the fourth longitudinal beam are two, respectively.

In some examples of the invention, the distance between two second longitudinal beams positioned at the outer side and the corresponding side edge is n2, the distance between the second longitudinal beam positioned at the outer side and the corresponding second longitudinal beam positioned at the inner side is n3, and the distance between two second longitudinal beams positioned at the inner side is n4, wherein 150mm & lt n2 & lt 200mm, 225mm & lt n3 & lt 275mm, and 150mm & lt n4 & lt 200 mm.

In some examples of the invention, the two third longitudinal beams and the two fourth longitudinal beams are symmetrically distributed about the central axis of the aluminum plate and have the same distance to the side edge, the distance from the third longitudinal beam to the side edge is n5, and the distance between the two third longitudinal beams is n6, wherein n5 is greater than or equal to 450mm and less than or equal to 550mm, and n6 is greater than or equal to 150mm and less than or equal to 200 mm.

In some examples of the invention, a rear stiffener is attached to a rear side of the fourth transverse beam.

In some examples of the invention, the tail reinforcing ribs are plural and arranged at intervals in the lateral direction.

In some examples of the present invention, a tail reinforcing plate is connected to both left and right ends of the fourth transverse beam.

In some examples of the invention, the tail stiffener is a right triangle with the hypotenuse coinciding with the rear corner edge.

In some examples of the invention, the profile beam is an aluminum alloy profile beam.

The battery case according to the present invention includes: the bottom plate component of the battery shell.

Drawings

Fig. 1 is a schematic structural view of a battery case according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a floor assembly;

FIG. 3 is a schematic structural view of the floor assembly;

FIG. 4 is a schematic structural view of a reinforcement beam assembly;

FIG. 5 is a schematic structural view of a motherboard mounting plate;

FIG. 6 is a schematic structural view of a mounting bracket;

FIG. 7 is a cross-sectional view of the aluminum profile of the side gusset;

FIG. 8 is a schematic view of a side panel and corresponding aluminum profile;

FIG. 9 is a schematic structural view of a lifting lug;

FIG. 10 is a schematic structural view of another shackle;

figure 11 is a schematic view of the shackle shown in figure 10;

FIG. 12 is a schematic structural view of another shackle;

figure 13 is a schematic view of the shackle shown in figure 12;

figure 14 is a schematic view of the aluminum profile mating of the lifting lug and the side gusset;

fig. 15 is a partial structure schematic diagram of the matching of the lifting lug and the aluminum profile of the side wall.

Reference numerals:

a battery case 100;

a floor assembly 10; an aluminum plate 1; front edge 1 a; the rear side 1 b; side edges 1 c; a front section 1 d; a rear section 1 e; a corner section 1 f; front corner edge 1 g; the rear corner edge is 1 h; tail reinforcing ribs 12; a tail reinforcing plate 13;

a profile beam 2; a first transverse beam 2 a; a second transverse beam 2 b; a third transverse beam 2 c; a fourth transverse beam 2 d; a first longitudinal beam 2 e; a second longitudinal beam 2 f; a third longitudinal beam 2 g; a fourth longitudinal beam 2 h; an inner aluminum plate 21; an outer aluminum plate 22; a reinforcing plate 23;

a side wall 20; a transverse aluminum profile 20 a; a longitudinal aluminum profile 20 b; corner aluminum profiles 20 c; an ear engaging plate 21; a vertical limb 22; a horizontal limb 23;

a lifting lug 30; a reinforcing rib 31; a hollow cavity 32;

a mounting member 40; a main board mounting plate 41; heat dissipation holes 41 a; a mounting bracket 42; securing the flange 42 a.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The battery case 100 according to the embodiment of the present invention is described in detail below with reference to fig. 1 to 15.

As shown in fig. 1, a battery case 100 according to an embodiment of the present invention may include: floor assembly 10, side wall 20 and a plurality of ears 30, floor assembly 10 includes: aluminum plate 1, aluminum plate 1 is the bottom plate in bottom plate subassembly 10 promptly, that is to say, aluminum plate 1 has been adopted to the bottom plate, and aluminum plate 1 quality is light, and structural strength is better to can effectively reduce battery case 100's weight, can make battery case 100 satisfy the lightweight design requirement of vehicle. The thickness of the aluminum plate 1 may be 3mm, but is not limited thereto. It should be noted that the aluminum alloy sheet 1 is one of the aluminum sheets 1.

As shown in fig. 1 and 8, the side panel 20 comprises a plurality of aluminum profiles, the aluminum profiles are sequentially connected end to form a closed loop structure, and the aluminum plate 1 is fixed in the side panel 20. Therefore, the side wall 20 is formed by splicing aluminum profiles, so that the side wall 20 is light in weight and good in structural strength. In addition, because the bottom plate and the side walls 20 are made of aluminum materials, the battery module and the battery management system in the battery shell 100 can be effectively prevented from being interfered by an external electric field of an external electronic instrument, and an efficient electromagnetic shielding effect can be achieved. The aluminum plate 1 and the aluminum profile in the side wall 20 can be welded and connected together through CMT (cold metal transition welding), so that the bottom plate and the aluminum profile are good in welding reliability, simple in welding and high in efficiency.

As shown in fig. 1 and 8, a plurality of lifting lugs 30 are fixed to the side gusset 20. A plurality of lifting lugs 30 can be distributed on the side wall 20 according to actual conditions.

Therefore, according to the battery shell 100 provided by the embodiment of the invention, the side wall 20 formed by splicing the aluminum plate 1 and the aluminum profile is arranged, so that the weight of the battery shell 100 can be effectively reduced, the battery shell 100 can meet the light design requirement of a vehicle, the battery module and the battery management system in the battery shell 100 can be effectively prevented from being interfered by an external electric field of an external electronic instrument, and a high-efficiency electromagnetic shielding effect can be achieved.

The respective parts of the battery case 100 are described in detail in turn with reference to the accompanying drawings.

First, the aluminum plate 1 in the floor panel assembly 10 will be described.

As shown in fig. 2 and 3, the chassis base may include: a front edge 1a, a rear edge 1b, and two side edges 1c, the front edge 1a being located on the front side of the rear edge 1b, and the front edge 1a and the rear edge 1b being arranged in parallel, the front-rear direction being the longitudinal direction, and the left-right direction being the lateral direction. Two side edges 1c are connected to the left and right sides of the front edge 1a and the rear edge 1b, a front corner edge 1g is connected between the front edge 1a and the side edge 1c, a rear corner edge 1h is connected between the side edge 1c and the rear edge 1b, and each side edge 1c includes: a front section 1d, a rear section 1e and a corner section 1f connected between the front section 1d and the rear section 1 e. The floor panel thus provided may facilitate the matching of the battery case 100 with the bottom space of the vehicle, and may facilitate the effective support of the battery module above the floor panel assembly 10. It should also be noted that the corner edge is configured to enable two adjacent edges in different directions to transition smoothly and naturally.

Further, as shown in fig. 3, the included angles between the front corner edge 1g and the corner section 1f and the front section 1d are α 1 and α 2, respectively, and the included angle between the corner section 1f and the rear section 1e is α 3, where α 1 is 120 ° or more, α 2 is α 3 or more, and 160 ° or less. That is to say, the extending direction between preceding corner limit 1g and the turning section 1f is the same, through setting up the extending direction of preceding corner limit 1g and turning section 1f, can make side 1c and preceding 1a transition nature, and can make transition nature between anterior segment 1d and the back end 1e, can make the anterior whole reasonable in design of bottom plate, the bearing is effectual, and can also improve the structural reliability of bottom plate, can improve the matching degree between bottom plate and the side wall 20.

Also, as shown in FIG. 3, the included angle between the rear corner edge 1h and the rear corner edge 1b is α 4, wherein α 4 is larger than or equal to 150 degrees and smaller than or equal to 180 degrees. The rear corner edge 1h and the rear edge 1b satisfying the above-described relational expression can make the rear portion of the floor panel reasonable in design and can improve the matching of the battery case 100 with the bottom space of the vehicle.

In addition, as shown in FIG. 3, L1, L2, L3 and L4 are respectively the lengths of the front edge 1a, the front section 1d of the side edge 1c, the rear section 1e of the side edge 1c and the rear edge 1b of the bottom plate, wherein L1 is more than or equal to 700mm and less than or equal to 800mm, L2 is more than or equal to 250mm and less than or equal to 350mm, L3 is more than or equal to 1100mm and less than or equal to 1200mm, and L4 is more than or equal to 750mm and less than. Therefore, under the condition that the bottom space of the vehicle is limited, the battery shell 100 can bear the battery modules to the maximum extent by reasonably designing the front edge 1a, the rear edge 1b and the two side edges 1c of the aluminum plate 1, the driving mileage of the vehicle can be prolonged, and the battery modules can be reasonably distributed on the battery shell 100.

Further, L1 is more than or equal to 0.8, L4 is more than or equal to 1.2, L2 is more than or equal to 0.1, and L3 is more than or equal to 0.4. This makes it possible to better limit the distribution of the battery modules on the battery case 100.

Wherein, the bottom plate assembly 10 may further include: the stiffening beam subassembly, the stiffening beam subassembly is fixed on aluminum plate 1, and the stiffening beam subassembly can include: a plurality of profile beams 2, which profile beams 2 may extend in a transverse direction as well as in a longitudinal direction, as will be described in more detail below.

As shown in fig. 1 to 4, the reinforcing beam assembly further includes: the number of the section beams 2 can be multiple, and the multiple section beams 2 are respectively fixed on the aluminum plate 1. Section bar roof beam 2 can play the effect of strengthening aluminum plate 1 structural strength, is provided with a plurality of round holes moreover on section bar roof beam 2, and the round hole can be for rivet nut mounting hole, and section bar roof beam 2 is connected through rivet nut with the battery module. From this, the battery module can be fixed on aluminum plate 1 through section bar roof beam 2, and the rivet nut can be connected section bar roof beam 2 and battery module well moreover to can guarantee the fixed reliability of battery module on bottom plate subassembly 10. In addition, the profile beam 2 is manufactured by the profile, so that the overall arrangement of the profile beam 2 is simple, the manufacturing difficulty of the bottom plate assembly 10 can be reduced, and the manufacturability of the bottom plate assembly 10 can be improved.

Specifically, as shown in fig. 1-4, the plurality of profile beams 2 are a plurality of transverse beams and a plurality of longitudinal beams, the plurality of transverse beams are longitudinally spaced apart, and the edges of the plurality of transverse beams extend to the side edges 1c, so that the plurality of transverse beams can reinforce the aluminum plate 1 in the transverse direction, and since the plurality of transverse beams are longitudinally spaced apart, each transverse beam can reinforce the area near the transverse beam, so that the plurality of transverse beams can reinforce the whole area of the bottom plate, thereby better improving the structural strength of the aluminum plate 1, and facilitating the distribution of the battery modules on the whole aluminum plate 1.

A plurality of longitudinal beams are connected between adjacent two of the transverse beams and to front sides of the transverse beams located on the longitudinal front sides. It will be appreciated that a part of the longitudinal beams may be connected to the front side of the transverse beam located at the longitudinal front side, and another part of the longitudinal beams may be connected between two adjacent transverse beams. From this, can be so that vertical roof beam can also effectively play the effect of fixed battery module when strengthening aluminum plate 1 on vertical, in addition, vertical roof beam can effectively connect the horizontal roof beam of enhancement like this to can improve the wholeness of stiffening beam subassembly, can make the stiffening beam subassembly strengthen whole aluminum plate 1 better, and fix a plurality of battery modules better.

Wherein, horizontal roof beam and vertical roof beam all can be aluminium alloy ex-trusions roof beam 2. The aluminum alloy section bar beam 2 is light in weight and good in structural strength, so that the reinforcing beam assembly can better reinforce the aluminum plate 1, and the battery case 100 can meet the light-weight design requirement of a vehicle.

Further, the plurality of longitudinal beams includes: a first longitudinal beam 2e, the first longitudinal beam 2e being connected at a midpoint of the lateral beam at the longitudinal front side, and the first longitudinal beam 2e extending toward the longitudinal front side. Wherein the transverse beam located at the front side in the longitudinal direction is the first transverse beam 2a, and the first longitudinal beam 2e extends forward from the midpoint of the first transverse beam 2a, so that both the first transverse beam 2a and the first longitudinal beam 2e can effectively reinforce the front portion of the bottom plate, and so that the first transverse beam 2a and the first longitudinal beam 2e can effectively fix the battery module located at the front portion.

Specifically, as shown in FIG. 3, the distance from the first longitudinal beam 2e to the front sections 1d of the two side edges 1c is the same, and the distance from the first longitudinal beam 2e to the front sections 1d of the side edges 1c is n1, wherein, n1 is 350mm ≦ n1 ≦ 450 mm. Like this through the first longitudinal beam 2e of rational arrangement position on aluminum plate 1 to and the width of the front portion of reasonable restriction aluminum plate 1, can make aluminum plate 1's anterior reasonable in design, can make the front portion of bottom plate bear better and fix battery module.

Wherein, the number of the longitudinal beams between the two transverse beams is at least two, and the plurality of longitudinal beams between the two transverse beams are symmetrically distributed around the central axis of the aluminum plate 1. Like this a plurality of vertical roof beams arrange rationally, and a plurality of vertical roof beams pass through the symmetric distribution, can improve the joint strength between the adjacent horizontal roof beam, can be convenient for battery module's fixed moreover to can improve the fixed reliability of battery module on bottom plate subassembly 10.

Specifically, as shown in fig. 1 to 4, the plurality of transverse beams includes: the first transverse beam 2a, the second transverse beam 2b, the third transverse beam 2c and the fourth transverse beam 2d are distributed from the longitudinal front side to the longitudinal rear side, four second longitudinal beams 2f are connected between the first transverse beam 2a and the second transverse beam 2b, two third longitudinal beams 2g are connected between the second transverse beam 2b and the third transverse beam 2c, and two fourth longitudinal beams 2h are connected between the third transverse beam 2c and the fourth transverse beam 2 d. The stiffening beam subassembly that so sets up can be so that stiffening beam subassembly wholeness is better, and bulk strength is higher, can bear fixed battery module better.

Wherein, as shown in FIG. 3, the distance from the first transverse beam 2a to the front edge 1a is m1, wherein, m1 is 450mm and 550 mm. The stiffening beam subassembly can divide into a plurality of regions with aluminum plate 1 like this, confirms through carrying out experimental analysis many times, and the anterior structural strength of aluminum plate 1 can effectively be strengthened to first horizontal roof beam 2a that satisfies above-mentioned relational expression, can be convenient for moreover battery module's fixed. Further, as shown in fig. 3, the first transverse beam 2a is located at the junction between the corner section 1f and the rear section 1e, so that the first transverse beam 2a can effectively reinforce the structural strength of the junction.

Further, the distance between the first transverse beam 2a and the second transverse beam 2b is m2, the distance between the second transverse beam 2b and the third transverse beam 2c is m3, the distance between the third transverse beam 2c and the fourth transverse beam 2d is m4, and the distance from the fourth transverse beam 2d to the rear edge 1b is m5, wherein m2 is 300mm or less, m3 is m4 or less 400mm, and m5 is 50mm or less and 100 mm. As shown in fig. 3, in the front-rear direction, the first transverse beam 2a is located at the joint between the corner section 1f and the rear section 1e, the second transverse beam 2b and the third transverse beam 2c correspond to the rear section 1e of the side edge 1c, and the fourth transverse beam corresponds to the joint between the rear corner edge 1h and the rear section 1e, so that the first transverse beam 2a, the second transverse beam 2b, the third transverse beam 2c and the fourth transverse beam 2d can reinforce the aluminum plate 1 after partitioning, and each region can be reasonably distributed by reasonably limiting the position between the adjacent transverse beams, so that the reinforcing effect of the reinforcing beam assembly on the aluminum plate 1 can be refined, the bearing performance of the battery housing 100 on the battery module can be improved, and the service life of the battery module can be prolonged.

The four second longitudinal beams 2f are symmetrically distributed about the central axis of the aluminum plate 1, that is, two second longitudinal beams 2f are uniformly distributed on the left side and the right side of the central axis, the two second longitudinal beams 2f close to the central axis are mutually symmetrical, and the two second longitudinal beams 2f far away from the central axis are mutually symmetrical.

As shown in FIG. 3, the distance between the two second longitudinal beams 2f located at the outer side and the corresponding side edge 1c is n2, the distance between the second longitudinal beam 2f located at the outer side and the corresponding second longitudinal beam 2f located at the inner side is n3, and the distance between the two second longitudinal beams 2f located at the inner side is n4, wherein, 150mm is not less than n2 is not less than 200mm, 225mm is not less than n3 is not less than 275mm, and 150mm is not less than n4 is not less than 200 mm. Therefore, in the area between the first transverse beam 2a and the second transverse beam 2b, the second longitudinal beam 2f can make the area of the aluminum plate 1 between the first transverse beam 2a and the second transverse beam 2b be distributed evenly and the whole bearing capacity is better by reasonably distributing the respective positions.

Furthermore, as shown in FIG. 3, the two third longitudinal beams 2g and the two fourth longitudinal beams 2h are symmetrically distributed about the central axis of the aluminum plate 1 and have the same distance to the side edge 1c, the distance from the third longitudinal beam 2g to the side edge 1c is n5, and the distance between the two third longitudinal beams 2g is n6, wherein n5 is 450mm or more and 550mm or less, and n6 is 150mm or more and 200mm or less. From this, third longitudinal beam 2g and fourth longitudinal beam 2h position are arranged rationally, can effectively connect adjacent horizontal roof beam, can effectively improve aluminum plate 1's structural strength moreover.

Specifically, the width d2 of the first, second and third

transverse beams

2a, 2b, 2c is the same, and the width d2 of the first, second and third

transverse beams

2a, 2b, 2c is greater than the width d3 of the fourth transverse beam 2 d. Because first transverse beam 2a, second transverse beam 2b and third transverse beam 2c correspond aluminum plate 1's main area, fourth transverse beam 2d department space has some restrictions moreover, so through the width of reasonable restriction transverse beam, can be so that transverse beam can effectively strengthen aluminum plate 1 in, can reduce the influence to aluminum plate 1 upper portion space, the stiffening beam subassembly can just strengthen aluminum plate 1 like this and reduce and find a balance between the influence to battery module.

The width d1 of the first longitudinal beam 2e is greater than the width d4 of the second longitudinal beam 2f, the width d5 of the third longitudinal beam 2g and the fourth longitudinal beam 2h are the same, and the width d5 of the third longitudinal beam 2g and the fourth longitudinal beam 2h is less than the width d4 of the second longitudinal beam 2 f. Third longitudinal beam 2g and fourth longitudinal beam 2h overall arrangement is the same like this to can make second transverse beam 2b, third transverse beam 2c and fourth transverse beam 2d, and third longitudinal beam 2g and fourth longitudinal beam 2h strengthen the structural strength in aluminum plate 1 rear portion jointly, can effectively fix the battery module that is located aluminum plate 1 rear portion moreover.

As shown in FIG. 3, the width of the first longitudinal beam 2e is d1, wherein d1 is 50mm or more and 80mm or less, d2 is 50mm or more and 80mm or less, d3 is 20mm or more and 50mm or less, d4 is 30mm or more and 60mm or less, and d5 is 10mm or more and 30mm or less. It can be understood that both the transverse beams and the longitudinal beams can be aluminum alloy section beams 2, so that a reinforcing beam assembly is formed by splicing the aluminum alloy section beams 2 with different sizes, and the reinforcing beam assembly is obtained by reasonable stress, bearing and performance analysis.

Further, d1 is more than or equal to 0.8, d4 is more than or equal to 1.0, d2 is more than or equal to 1.8, d3 is more than or equal to 2.2, d4 is more than or equal to 2, d5 is more than or equal to 2.5, d3 is more than or equal to 1.0, and d5 is more than or equal to 1.5. The stiffening beam subassembly reasonable in design that so sets up, the wholeness is better, and the reliability is better moreover.

According to one embodiment of the invention, as shown in fig. 2, a tail reinforcement 12 is attached to the rear side of the fourth transverse beam 2 d. The tail reinforcing ribs 12 may be used to reinforce the structural strength of the fourth transverse beam 2d, and the structural strength of the fourth transverse beam 2d is limited to its own width, but by providing a plurality of tail reinforcing ribs 12, the structural strength can be compensated. Preferably, a plurality of the tail reinforcing ribs 12 are provided at intervals in the lateral direction, so that the plurality of the tail reinforcing ribs 12 can uniformly reinforce the fourth lateral beam 2d in the lateral direction.

Alternatively, as shown in fig. 2, the fourth lateral beam 2d has tail reinforcing plates 13 attached to both left and right ends thereof. The rear reinforcing plate 13 can also reinforce the fourth transverse beam 2d and also the rear edge 1b of the aluminum plate 1. Specifically, the tail stiffener 13 is a right triangle with the hypotenuse coinciding with the rear corner edge 1 h. The tail reinforcing plate 13 is reasonable in design, and the stability of the right-angle three-row shape is better, so that the fourth transverse beam 2d can be better reinforced.

Therefore, when the automobile is started, accelerated or rear-end collided, the fourth transverse beam 2d at the tail part is subjected to the extrusion force applied to the fourth transverse beam 2d by the battery module in the battery shell 100 due to the influence of inertia, the instantaneous force of the extrusion force is very high, and the tail reinforcing ribs 12 and the tail reinforcing plate 13 can avoid the extrusion fracture of the fourth transverse beam 2 d. Moreover, the tail reinforcing rib 12 is formed by processing the section of the existing section, so that the material utilization rate is improved. The tail reinforcing plate 13 is made of an aluminum material plate, and is welded to the aluminum plate 1 by MIG (metal inert gas welding).

The specific structure of the stiffening beam (i.e., the profile beam 2) in the stiffening beam assembly will be described in detail below with reference to fig. 7.

As shown in fig. 7, the reinforcing beam includes: aluminum plate and reinforcing plate 23, aluminum plate and reinforcing plate 23 all are the shape of falling U, and aluminum plate and reinforcing plate 23 range upon range of fixedly moreover. From this, through setting up aluminum plate, can reduce the weight of section bar roof beam 2, moreover through setting up reinforcing plate 23, can effectively strengthen the structural strength of reinforcing beam, moreover through range upon range of fixedly with aluminum plate and reinforcing plate 23, can guarantee reliability between the two. Optionally, the reinforcing plate 23 is a steel plate, and the structural strength of the steel plate is better.

Specifically, as shown in fig. 7, the aluminum plates are two layers and are an inner aluminum plate 21 and an outer aluminum plate 22, respectively, and the reinforcing plate 23 is sandwiched and fixed between the inner aluminum plate 21 and the outer aluminum plate 22. In other words, the reinforcing beam may have a three-layer composite structure, and the reinforcing plate 23 may be sandwiched between the inner aluminum plate 21 and the outer aluminum plate 22, so that the structural strength of the reinforcing beam may be improved, and the reinforcing plate 23 may be prevented from being damaged and corroded, thereby prolonging the service life of the reinforcing beam.

According to an alternative embodiment of the present invention, the thickness of the inner aluminum plate 21 is equal to or less than the thickness of the outer aluminum plate 22. This ensures the overall reliability of the reinforcing beam and also provides a better reinforcing effect for the reinforcing plate 23. Further, the thickness of the outer aluminum plate 22 is t1, the thickness of the reinforcing plate 23 is t2, and the thickness of the inner aluminum plate 21 is t3, wherein 0.7mm ≦ t2 ≦ t3 ≦ t1 ≦ 5 mm. Through reasonable setting of the thicknesses of the three, the structural strength of the stiffening beam can be guaranteed, meanwhile, the weight of the stiffening beam can be prevented from being too large, and the weight of the stiffening beam can be light.

Preferably, 2. ltoreq. t1: t 2. ltoreq.3. Through the thickness of controlling outer aluminum plate 22 and reinforcing plate 23 like this, can directly influence the structural strength of stiffening beam, the stiffening beam intensity that so sets up is high, and the reliability is good.

The width of the reinforcing beam is d, the height of the reinforcing beam is h, wherein d is more than or equal to 2, and h is less than or equal to 4. Like this stiffening beam self reasonable in design to can make the stiffening beam effectively fix the battery module on aluminum plate, can make the stiffening beam strengthen aluminum plate 1's structural strength better moreover.

Alternatively, the inner aluminum plate 21 and the outer aluminum plate 22 are adhesively fixed to the reinforcing plate 23, respectively. The bonding fixation can ensure that the connection reliability between the inner aluminum plate 21 and the outer aluminum plate 22 and the reinforcing plate 23 is better, and the bonding fixation mode is simple and the cost is low. Specifically, an adhesive layer is provided on at least one of the outer aluminum sheet 22 and the reinforcing sheet 23, and an adhesive layer is provided on at least one of the inner aluminum sheet 21 and the reinforcing sheet 23.

A plurality of mounts 40 for mounting the battery management system are described below in conjunction with fig. 1, 2, 5, and 6.

A plurality of mounting members 40 are mounted on the aluminum plate 1, and the plurality of mounting members 40 are distributed between the first and second

transverse beams

2a and 2 b. Thereby, the battery management system can be distributed in the area between the first and second

lateral beams

2a and 2b, and the mounting member 40 can function to mount and fix the battery management system, so that the fixing reliability of the battery management system is good. The mounting part 40 is welded and fixed with the aluminum plate 1, and the welding and fixing are reliable and efficient. The first and second

lateral beams

2a and 2b may function to protect the battery management system.

Also, a plurality of second longitudinal beams 2f space the plurality of mounts 40 apart. It should be noted that the battery management system may include a plurality of components, for example, auxiliary components such as a motherboard, a slave board, a high voltage box, a fuse, a relay, a shunt, etc., and the plurality of components may be respectively mounted on the aluminum plate 1 through the mounting members 40, and due to the arrangement of the second longitudinal beam 2f, the region between the first transverse beam 2a and the second transverse beam 2b may be divided into a plurality of regions, so that the plurality of components may be mounted in different divided regions, thereby making the interference effect of the plurality of components small and working reliable.

Wherein, as shown in fig. 2 and 5, the plurality of mounting members 40 includes: a main plate mounting plate 41, the main plate mounting plate 41 being mounted between the two second longitudinal beams 2 f. The main board mounting plate 41 can mount the main board on the aluminum plate 1, and the mounting of the main board can be facilitated by adopting a plate-shaped structure. And the two second longitudinal beams 2f on both sides can be at least somewhat protected.

The main board mounting plate 41 is provided with a plurality of heat radiation holes 41 a. The heat dissipation holes 41a can achieve light weight and reduce weight, and can facilitate heat dissipation. As shown in fig. 5, the heat dissipation holes 41a are circular holes with different diameters. Thus, the heat dissipation holes 41a are simply arranged, and the entire main board mounting plate 41 is structurally reliable.

Optionally, the plurality of mounts 40 comprises: and the mounting bracket 42 is in an inverted U shape. The mounting bracket 42 is configured in a bracket shape, which may facilitate fixing of other components and may reduce the required material of the mounting bracket 42.

As shown in fig. 6, the lower end of the mounting bracket 42 is provided with a fixing flange 42 a. The fixing flange 42a may be used to fix the aluminum plate 1, and specifically, the fixing flange and the aluminum plate may be fixed by welding in a MIG manner. Wherein, the mounting bracket 42 is an inverted U-shaped aluminum plate. The aluminum plate is light in weight and easy to dissipate heat.

A lower gusset 20 is described in detail below in conjunction with fig. 8.

As shown in fig. 8, the side panel 20 comprises a plurality of aluminum profiles, which are connected end to end in sequence to form a closed loop structure. The aluminum profile is simple in structure and light in weight, so that the side wall 20 can be easily spliced. Wherein, as shown in fig. 8, the aluminum profile may be L-shaped. The upper portion of the L-shaped aluminum profile can surround the side direction of the aluminum plate 1, and the lower portion of the L-shaped aluminum profile can be welded and fixed with the aluminum plate 1, so that the aluminum profile is simple in structure and easy to arrange.

Specifically, as shown in fig. 8, the plurality of aluminum profiles include: the aluminum plate comprises transverse aluminum profiles 20a, longitudinal aluminum profiles 20b and corner aluminum profiles 20c, wherein the transverse aluminum profiles 20a are arranged in a front-back spaced mode, the transverse aluminum profiles 20a on the front side are welded and fixed with the front side 1a of the aluminum plate 1 correspondingly, and the transverse aluminum profiles 20a on the rear side are welded and fixed with the rear side 1b of the aluminum plate 1 correspondingly.

The longitudinal aluminum profiles 20b are plural, and the plural longitudinal aluminum profiles 20b are respectively located at the left and right sides of the two transverse aluminum profiles 20a, the corner aluminum profiles 20c are plural, and the plural corner aluminum profiles 20c are respectively connected obliquely between the transverse aluminum profiles 20a and the longitudinal aluminum profiles 20b and between the two longitudinal aluminum profiles 20b at the same side. That is, a part of the corner aluminum profiles 20c is connected between the transverse aluminum profiles 20a and the longitudinal aluminum profiles 20b, such corner aluminum profiles 20c may correspond to the front corner edge 1g and the rear corner edge 1h of the aluminum plate 1, and another part of the corner aluminum profiles 20c is connected between the two longitudinal aluminum profiles 20b on the same side, such corner aluminum profiles 20c may correspond to the corner section 1f of the aluminum plate 1. Therefore, the side wall 20 can be well matched with the aluminum plate 1, and the structural reliability of the battery case 100 can be ensured.

Specifically, there are two longitudinal aluminum profiles 20b on the same side, and the two longitudinal aluminum profiles 20b are connected by a corner aluminum profile 20 c. Thus, the longitudinal aluminum profile 20b located on the front side corresponds to the front section 1d of the side 1c of the aluminum plate 1, the longitudinal aluminum profile 20b located on the rear side corresponds to the rear section 1e of the side 1c of the aluminum plate 1, and the corner aluminum profile 20c corresponds to the corner section 1f of the side 1c of the aluminum plate 1.

Alternatively, as shown in fig. 8, each aluminum profile comprises a vertical limb 22 and a horizontal limb 23, the vertical limb 22 and the horizontal limb 23 are connected and perpendicular to each other, and the height H of the vertical limbs 22 of all the aluminum profiles is the same, so that the height of the side frame 20 is the same, and the overall flatness of the side frame 20 is better. Preferably, H is more than or equal to 40mm and less than or equal to 60 mm.

The horizontal limbs 23 of the longitudinal aluminium profiles 20b situated at the front have a greater extension than the extension of the horizontal limbs 23 of the two transverse aluminium profiles 20a and the extension of the horizontal limbs 23 of the longitudinal aluminium profiles 20b situated at the rear. Through analysis of a stress cloud chart of a Computer Aided Engineering (CAE) of the front end of the side wall 20, the stress at the corner aluminum section 20c of the front end of the side wall 20 is found to be large, so that the stress at the corner of the front end of the side wall 20 can be dispersed by reasonably setting the extension length of the horizontal limb 23 of the longitudinal aluminum section positioned in front, and the bearing performance at the corner of the front end of the side wall 20 can be improved.

As shown in FIG. 8, in the front and rear direction, the lengths of the horizontal limbs 23 of the two transverse aluminum profiles 20a are a1 and a4, respectively, and the lengths of the horizontal limbs 23 of the two longitudinal aluminum profiles 20b are a2 and a3, respectively, wherein a3 is more than or equal to 10mm and less than or equal to a1 and less than or equal to a4 and less than or equal to 30mm, and a2 is more than or equal to 40mm and less than or equal to 80 mm. By selecting the reasonable length of the horizontal limb 23, the whole arrangement of the side wall 20 can be more reliable, and the bearing performance of the battery shell 100 can be better.

Also, as shown in fig. 8, the longitudinal aluminum profile 20b located at the rear is provided with an outwardly projecting lug engaging plate 21. Therefore, the lifting lug 30 is firstly clamped at the longitudinal aluminum profile 20b, and then the lifting lug 30 is welded and fixed with the longitudinal aluminum profile 20b, so that the fixing reliability of the lifting lug 30 and the longitudinal aluminum profile 20b can be improved. As shown in fig. 14, the lug engaging plate 21 may be two horizontal plates disposed opposite to each other in the up-down direction; as shown in fig. 15, the lug engaging plate 21 may be formed of two L-shaped plates disposed opposite to each other in the up-down direction.

At least one hollow cavity is arranged in the aluminum profile. The hollow cavity can effectively reduce the weight of the aluminum profile. Further, as shown in fig. 8, a plurality of hollow cavities are provided, and the cross sections of the hollow cavities are all rectangular. It can be understood that the stability of the rectangular hollow cavity is better, so that the structural reliability of the aluminum profile is better.

The lower lifting lug 30 is described in detail below in connection with fig. 9-15.

The lifting lug 30 is mainly divided into three types, and the lifting lug 30 shown in fig. 9 is a type of lifting lug 30, and the type of lifting lug 30 can be fixed on the transverse aluminum profile 20a located at the front, and as shown in fig. 1, the type of lifting lug 30 can be two. The lifting lug 30 shown in fig. 10 and 11 is another lifting lug 30, and the lifting lug 30 can be fixed on the corner aluminum profile 20c between the two longitudinal aluminum profiles 20b, and the lifting lug 30 shown in fig. 12 and 13 is another lifting lug 30, and the lifting lug 30 can be fixed on the longitudinal aluminum profile 20b positioned at the rear and can be fixed on the transverse aluminum profile 20a positioned at the rear. By appropriately matching the three types of the lugs 30 described above, it is possible to enable the battery case 100 to be reliably mounted at the bottom space of the vehicle.

The lifting lug 30 may be an aluminum profile. The three lifting lugs 30 can be made of aluminum profiles, the aluminum profiles are light in weight and good in structural strength, the reliability of the battery shell 100 can be guaranteed through the lifting lugs 30, and the weight of the battery shell 100 can be reduced.

Alternatively, as shown in fig. 10 to 13, a plurality of reinforcing ribs 31 are provided inside the lifting lug 30 to cross each other, and the plurality of reinforcing ribs 31 and the circumferential wall of the lifting lug 30 may define a plurality of hollow cavities 32. The reinforcing ribs 31 can effectively reinforce the structural strength of the lifting lug 30, the structural reliability of the lifting lug 30 can be improved, and the hollow cavity 32 can further reduce the weight of the lifting lug 30.

Specifically, as shown in fig. 11, β 1, β 2, and β 3 are included angles at the position of the reinforcing rib 31, respectively, where β 1 is greater than or equal to 60 °, β 1 is greater than or equal to 90 °, β 2 is greater than or equal to 100 °, β 3 is greater than or equal to 30 °, and β 3 is greater than or equal to 60 °

Specifically, as shown in fig. 10-13, the hollow cavities 32 may have a triangular, trapezoidal, or rectangular cross-section. The stability of the triangle, trapezoid and rectangle is better, so that the stability of the lifting lug 30 can be ensured. Wherein the triangle can be a right triangle or an obtuse triangle.

The hollow cavities 32 are divided into an upper layer and a lower layer, and the number of the hollow cavities 32 located in the upper layer is smaller than that of the hollow cavities 32 located in the lower layer. Therefore, the hollow cavities 32 are reasonably arranged, so that the whole structure of the lifting lug 30 is reasonable in arrangement, and the structural strength of all parts is good in consistency.

Two different arrangements of the lifting lugs 30 are described below.

As shown in fig. 10 and 11, two hollow cavities 32 are located in the upper layer, and the two hollow cavities 32 are respectively rectangular and right-angled triangular, and three hollow cavities 32 are located in the lower layer, and the three hollow cavities 32 are respectively right-angled triangular, right-angled trapezoidal, and inverted right-angled trapezoidal. The lifting lug 30 that so sets up is bulky, and structural strength is good, and the stability of lifting lug 30 hoist and mount is good.

As shown in fig. 12 and 13, the hollow cavities 32 in the upper layer are one and right trapezoid, the hollow cavities 32 in the lower layer are two, and the two hollow cavities 32 are respectively obtuse triangles and inverted right trapezoids. The lifting lug 30 thus arranged has good structural strength, appropriate volume and good stability.

As shown in fig. 10 to 13, the lifting lug 30 includes an upper portion having a right-angled trapezoid cross section and a lower portion having an inverted right-angled trapezoid cross section. The sectional area of the right trapezoid at the upper part is smaller than that of the inverted right trapezoid, so that the inverted right trapezoid at the lower part and the side wall 20 can be conveniently matched and fixed with each other.

The widths of the top surface and the bottom surface of the lifting lug 30 are respectively c1 and c2, wherein c1 is more than or equal to 30mm and less than or equal to 60mm, and c2 is more than or equal to 10mm and less than or equal to 120 mm. Thus, the entire size of the lug 30 is suitable, and the installation reliability of the battery case 100 in the bottom space of the vehicle is ensured. Preferably 0.5 ≦ c1: c2 ≦ 4.

The height of the lifting lug 30 can be h, and h is more than or equal to 80mm and less than or equal to 120 mm. The height of the second lifting lug 30 is h2, the height of the third lifting lug 30 is h3, wherein the height of h2 is more than or equal to 80mm and less than or equal to h3 and less than or equal to 120 mm. The height of the first lifting lug 30 is h1, and the height of the first lifting lug is more than or equal to 250mm and less than or equal to h1 and less than or equal to 300 mm.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A floor assembly for a battery housing, comprising:

an aluminum plate; the aluminum plate includes: the front side, back side and two sides, two sides are connected in the front side with the left and right sides of back, be connected with preceding corner limit between the front side with the side, be connected with back corner limit between the side with the back, every the side includes: a front section, a rear section and a corner section connected between the front section and the rear section;

the section bar roof beam is a plurality of and fix on the aluminum plate, a plurality of section bar roof beams are a plurality of horizontal roof beams and a plurality of longitudinal beams respectively, a plurality of horizontal roof beams are vertical interval setting and the edge extends to side department, a plurality of horizontal roof beams include: first to fourth transverse beams, the plurality of longitudinal beams including: first to fourth longitudinal beams, the first longitudinal beam being connected at a midpoint of a first transverse beam and extending to a longitudinal front side, a plurality of second longitudinal beams being connected between the first transverse beam and the second transverse beam, a plurality of third longitudinal beams being connected between the second transverse beam and the third transverse beam, a plurality of fourth longitudinal beams being connected between the third transverse beam and the fourth transverse beam;

a plurality of mounts for mounting a battery management system, the plurality of mounts mounted on the aluminum plate and distributed between the first and second transverse beams, the plurality of mounts comprising: the main board mounting plate is provided with a plurality of heat dissipation holes;

the section beam is in an inverted U shape and comprises an inner aluminum plate, an outer aluminum plate and a reinforcing plate, wherein the reinforcing plate is clamped and fixed between the inner aluminum plate and the outer aluminum plate;

a side wall, the side wall comprising: the longitudinal aluminum profile positioned at the rear part is provided with a lifting lug clamping plate extending outwards;

a plurality of lugs, it is a plurality of the lug is fixed on the side encloses, the lug with the cooperation of lug joint board, the lug includes: the cross section of the upper part is a right trapezoid, and the cross section of the lower part is an inverted right trapezoid;

wherein the first, second, and third transverse beams have the same width, and the first, second, and third transverse beams have a width greater than the fourth transverse beam;

the width of the first longitudinal beam is greater than that of the second longitudinal beam, the widths of the third longitudinal beam and the fourth longitudinal beam are the same, and the widths of the third longitudinal beam and the fourth longitudinal beam are smaller than that of the second longitudinal beam;

and the rear side of the fourth transverse beam is connected with a tail reinforcing rib.

2. The battery housing floor assembly of claim 1, wherein the front corner edge and the corner segment have an angle α 1 and α 2 with the front segment, respectively, and the corner segment has an angle α 3 with the rear segment, wherein α 2 is 120 ° or more and α 3 is 160 ° or less.

3. The battery housing floor assembly of claim 1, wherein the rear corner edge forms an angle α 4 with the rear edge, wherein α 4 is 150 ° or more and 180 ° or less.

4. The battery housing floor assembly of claim 1 wherein the first longitudinal beam is a distance n1 from the front section of the side edge of 350mm n1 mm 450mm and the first transverse beam is a distance m1 from the front edge of 450mm m1 mm 550 mm.

5. The battery housing floor assembly of claim 1, wherein the distance between the first and second transverse beams is m2, the distance between the second and third transverse beams is m3, the distance between the third and fourth transverse beams is m4, and the distance from the fourth transverse beam to the rear edge is m5, wherein 300mm ≦ m2 ≦ m3 ≦ m4 ≦ 400mm, and 50mm ≦ m5 ≦ 100 mm.

6. The battery housing floor assembly of claim 1, wherein the plurality of longitudinal beams between the two transverse beams are symmetrically distributed about the central axis of the aluminum plate.

7. The battery housing floor assembly of claim 6, wherein the second longitudinal beam is four and the third and fourth longitudinal beams are two each.

8. The bottom plate assembly of battery case according to claim 7, wherein the distance between the two second longitudinal beams located at the outer side and the corresponding side edge is n2, the distance between the two second longitudinal beams located at the outer side and the corresponding second longitudinal beam located at the inner side is n3, and the distance between the two second longitudinal beams located at the inner side is n4, wherein 150mm ≦ n2 ≦ 200mm, 225mm ≦ n3 ≦ 275mm, and 150mm ≦ n4 ≦ 200 mm.

9. The bottom plate assembly of battery case according to claim 7, wherein two of the third longitudinal beams and two of the fourth longitudinal beams are symmetrically distributed about the central axis of the aluminum plate and have the same distance to the side edge, the distance from the third longitudinal beam to the side edge is n5, and the distance between the two third longitudinal beams is n6, wherein, 450mm < n5 < 550mm, 150mm < n6 < 200 mm.

10. The battery housing floor assembly of claim 1, wherein the tail ribs are plural and spaced apart in a lateral direction.

11. The battery housing floor assembly of claim 1, wherein a tail reinforcement plate is attached to left and right ends of the fourth cross beam.

12. The battery housing floor assembly of claim 11 wherein the tail stiffener is a right triangle with the hypotenuse coinciding with the rear corner edge.

13. The battery housing floor assembly of claim 1, wherein the profile beam is an aluminum alloy profile beam.

14. A battery housing comprising a floor assembly of a battery housing according to any of claims 1-13.