CN213082891U

CN213082891U - Lower box body of battery box and battery box

Info

Publication number: CN213082891U
Application number: CN202021258129.XU
Authority: CN
Inventors: 于翔; 晏义伍; 梁小林
Original assignee: Shenzhen Academy of Aerospace Technology
Current assignee: Shenzhen Academy of Aerospace Technology
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-04-30
Anticipated expiration: 2030-06-30

Abstract

The utility model discloses a battery box lower box body and a battery box, wherein the battery box lower box body comprises a bottom plate, a frame and a lifting lug, the bottom plate comprises a first skin, a foam core material and a second skin, and the foam core material is clamped between the first skin and the second skin; the bottom plate is also provided with a reinforcing cross beam; the side of bottom plate is located around the frame, and the outside of frame is located to the lug. The utility model discloses box light in weight under the battery box, impact resistance and penetration resistance are strong, and mechanical properties is excellent.

Description

Lower box body of battery box and battery box

Technical Field

The utility model belongs to the technical field of new energy automobile and specifically relates to a box and battery box under battery box.

Background

With the development of electric automobiles, the endurance mileage of the whole automobile is provided, and the reduction of the weight of the whole automobile is imperative. The battery box is a key component of the electric automobile, so the lightweight design and manufacture of the battery box have important significance for the lightweight of the whole automobile. Because the lower box body of the battery box needs to have higher structural strength, the lower box body of the battery box at present is generally made of metal materials, but the metal battery box body has the defects of heavier weight, low impact strength and the like, and is not beneficial to the light weight of a new energy automobile, so that a light-weight and high-strength lower battery shell is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a box and battery box under battery box.

In a first aspect, an embodiment of the present invention provides a battery box lower box, including:

the bottom plate comprises a first skin, a foam core material and a second skin, wherein the foam core material is clamped between the first skin and the second skin; the bottom plate is provided with a reinforcing cross beam;

the frame is wound on the side edge of the bottom plate;

the lifting lug is arranged on the outer side of the frame.

The utility model discloses the box has following beneficial effect under the battery box at least: according to the lower box body of the battery box, the first skin, the foam core material and the second skin are compounded to form the bottom plate, so that the weight of the lower box body can be effectively reduced, and the light weight of a new energy automobile is facilitated; the bottom plate more than adopting, and set up the web beam on the bottom plate, can effectively reduce the protection of external impact to the battery in the box, promote the battery box and shock resistance and prevent the penetrability, improve the whole mechanical properties of box under the battery box, save the required protection of traditional metallic structure box lower surface and handle.

According to the utility model discloses a box under the battery box of other embodiments, the inboard of frame is equipped with the draw-in groove, the bottom plate install in the draw-in groove.

According to the utility model discloses a box under battery box of other embodiments, the reinforcement beam inlays to be located in the foam core material.

According to the utility model discloses a box under battery box of other embodiments, first covering and/or the second covering is continuous fiber reinforced resin base composite material layer.

According to the utility model discloses a box under battery box of other embodiments, the foam core material is PVC foam core material, PMI foam core material or PET foam core material.

According to the utility model discloses a box under battery box of other embodiments, the foam core goes up towards the surface of first covering with the second covering is provided with vertically and horizontally staggered's recess, the foam core with first covering with second covering adhesive bonding.

According to the utility model discloses a box under battery box of other embodiments, the crossing department of recess is equipped with and runs through the through-hole of foam core.

According to the utility model discloses a box under battery box of other embodiments, the frame with the lug is hollow structure, the frame with the inside of lug all is equipped with the strengthening rib.

According to the utility model discloses a box under battery box of other embodiments, the stiffening beam is glass fiber pultrusion section bar or carbon fiber pultrusion section bar.

In a second aspect, an embodiment of the present invention provides a battery box, including the present invention provides an arbitrary kind of battery box lower box body provided by the first aspect.

The utility model discloses battery box has following beneficial effect at least: because the battery box comprises the lower box body of the battery box, the weight of the battery box can be reduced, and the light weight is favorably realized; and the impact resistance and the penetration resistance of the battery box body can be improved, and the mechanical property of the battery box body is improved.

Drawings

Fig. 1 is a schematic perspective view of a lower box body of a battery box according to an embodiment of the present invention;

fig. 2 is a front view of a lower case of the battery case shown in fig. 1;

FIG. 3 is a cross-sectional view taken along section A-A of FIG. 2;

fig. 4 is a partial enlarged view at M in fig. 3.

Detailed Description

The conception and the resulting technical effects of the present invention will be described clearly and completely with reference to the following embodiments, so that the objects, features and effects of the present invention can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, if an orientation description is referred to, for example, the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, only for convenience of description and simplification of description, but not for indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the embodiments of the present invention, if a feature is referred to as being "disposed", "fixed", "connected", or "mounted" on another feature, it can be directly disposed, fixed, or connected to the other feature or indirectly disposed, fixed, connected, or mounted on the other feature. In the description of the embodiments of the present invention, if "a plurality" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.

Referring to fig. 1 to 4, fig. 1 is a schematic perspective view of a lower case of a battery case according to an embodiment of the present invention, fig. 2 is a front view of the lower case of the battery case shown in fig. 1, and fig. 3 is a cross-sectional view taken along a-a section in fig. 2; fig. 4 is a partial enlarged view at M in fig. 3. As shown in fig. 1 to 4, the lower case of the battery box comprises a bottom plate 10, a frame 20 and a lifting lug 30; the bottom plate 10 comprises a first skin 11, a foam core material 12 and a second skin 13, wherein the foam core material 12 is clamped between the first skin 11 and the second skin 13; the bottom plate 10 is provided with a reinforcing beam 14; the frame 20 is wound on the side of the bottom plate 10; the lifting lug 30 is arranged on the outer side of the frame 20.

In this embodiment, the reinforcing cross member 14 of the base plate 10 is embedded in the foam core 12. Specifically, the reinforcing beams 14 and the foam core 12 are sequentially and alternately arranged on the first skin 11, the reinforcing beams 14 are multiple, the reinforcing beams 14 are horizontally arranged at intervals, and the second skin 13 is arranged on the surface of the foam core 12, which is far away from the first skin 11. The surface of the reinforcement beam 14 facing away from the first skin 11 is generally higher or flush with the surface of the second skin 13 facing away from the foam core 12 to avoid that the foam core 12 is pressed for a long time by the battery placed in the case during use, resulting in a reduced impact and penetration resistance.

The first skin 11 and the second skin 13 mainly function to make the bottom plate 10 form an integrated force-bearing structure. The skin, the foam core material 12 and the reinforcing beam 14 can be connected through adhesive bonding, the adhesive can be epoxy resin adhesive, and particularly, in the preparation process, the gap between the skin and the foam core material 12 and the reinforcing beam 14 is filled with the adhesive, and then the skin, the foam core material 12 and the reinforcing beam 14 are solidified and bonded. In some embodiments, criss-crossing grooves may be provided on the foam core 12 facing the surfaces of the first and

second skins

11, 13, and the bonding process adhesive fills the grooves to improve the bond strength between the skins and the foam core 12. In addition, through holes penetrating through the foam core 12 can be arranged at the intersection of the grooves on the foam core 12, and the adhesive fills the grooves and the through holes in the gluing process so as to further improve the bonding strength between the skin and the foam core 12. The reinforcement beam 14 and the foam core 12 may be bonded together by structural adhesive.

In the preparation process, the foam core material 12 and the reinforcing beam 14 are bonded into a whole by using structural adhesive, then the skin is used for wrapping, and then the skin, the foam core material 12 and the reinforcing beam 14 are integrally formed by using a high-pressure resin transfer molding process, a vacuum introduction process, a die pressing process or an autoclave vacuum bag pressing process.

The first skin 11 and/or the second skin 13 may be a continuous fiber reinforced resin-based composite material layer, and the continuous fiber reinforced resin-based composite material may include at least one of glass fibers and carbon fibers and a hot-melt resin; the thickness of the first skin 11 and the second skin 13 is generally 0.5-2 mm, and the flame retardant rating is UL 94-VO. The foam core 12 may be a PVC foam core, PMI foam core or PET foam core, and the density of the foam core 12 is generally 80kg/m³～100kg/m³The thickness is 15-20 mm. The reinforcing beam 14 on the bottom plate 10 can be made of glass fiber pultrusion profiles or blanket fiber tension-compression profiles, and the pultrusion profiles are used as the reinforcing beam 14, so that the modular assembly molding can be realized, and the production efficiency of the box body is improved.

In addition, in other embodiments, the base plate 10 may be provided in other configurations. For example, the foam core 12 is sandwiched between the first skin 11 and the second skin 13, and the reinforcement beam 14 is provided on the surface of the second skin 13 facing away from the foam core 12. Alternatively, the reinforcing beam 14 is embedded in the foam core 12 to form a reinforcing core, and then the first skin 11 and the second skin 13 are coated on both sides of the reinforcing core.

As shown in fig. 4, in the present embodiment, a slot 21 is disposed on an inner side of the frame 20, and the bottom plate 10 is disposed in the slot 21. By the arrangement of the clamping groove 21, the installation firmness between the bottom plate 10 and the frame 20 can be improved. During installation, the bottom plate 10 and the frame 20 can be adhesively connected by coating structural adhesive in the clamping groove 21. Through the arrangement of the assembly structure between the bottom plate 10 and the frame 20, the modular production can be realized, the production process is simplified, and the production efficiency is improved. In addition, the frame 20 and the hanger 30 may be formed in a hollow structure in order to further reduce the weight, and reinforcing ribs may be provided inside the frame 20 and the hanger 30 in order to improve the structural strength. The frame 20 and the lifting lug 30 can be made of aluminum alloy materials, and specifically can be made of aluminum alloy extruded sections, so that modular production is further facilitated; the connection mode between the frame 20 and the lifting lug 30 can adopt welding so as to meet the fatigue strength of the connection between the box body and the vehicle part.

The lower box body of the battery box can be internally provided with holes, threads and steel wire thread sleeves which are embedded on the reinforcing cross beam 14 according to the installation layout of the batteries so as to fix the battery module; moreover, a fastener for matching, butting and installing with the upper box body of the battery box can be arranged on the frame 20; in addition, a sealing ring can be arranged on the frame 20 to ensure the sealing performance of the joint of the upper box body and the lower box body.

By the above, the lower box body of the battery of the utility model adopts the bottom plate 10 formed by compounding the first skin 11, the foam core material 12 and the second skin 13, so that the weight of the lower box body of the battery box can be effectively reduced, and the light weight of a new energy automobile is facilitated; base plate 10 more than adopting, and set up reinforcing beam 14 on base plate 10, can effectively reduce the protection of external impact to the battery in the box, promote the battery box and shock resistance and penetration resistance, promote the mechanical properties of box under the battery box, and save the required protection of traditional metallic structure box lower surface and handle.

Above battery box under and then can be applied to the preparation battery box, and then, the utility model also provides a battery box, box under any kind of battery box above.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims

1. The utility model provides a box under battery box which characterized in that includes:

the frame is wound on the side edge of the bottom plate;

the lifting lug is arranged on the outer side of the frame.

2. The lower box body of the battery box as claimed in claim 1, wherein a slot is formed on the inner side of the frame, and the bottom plate is installed in the slot.

3. The battery box lower case according to claim 1, wherein the reinforcing cross member is embedded in the foam core material.

4. The battery box lower case body according to claim 1, wherein the first skin and/or the second skin is a continuous fiber reinforced resin-based composite material layer.

5. The battery box lower case according to claim 1, wherein the foam core material is a PVC foam core material, a PMI foam core material or a PET foam core material.

6. The battery box lower case according to claim 1, wherein the foam core material is provided with criss-cross grooves on a surface thereof facing the first skin and the second skin, and is adhesively bonded to the first skin and the second skin.

7. The battery box lower case body according to claim 6, wherein a through hole penetrating through the foam core material is formed at the intersection of the grooves.

8. The lower box body of the battery box as claimed in any one of claims 1 to 7, wherein the frame and the lifting lug are of a hollow structure, and reinforcing ribs are arranged inside the frame and the lifting lug.

9. The battery box lower case according to any one of claims 1 to 7, wherein the reinforcing cross member is a glass fiber pultruded profile or a carbon fiber pultruded profile.

10. A battery box characterized by comprising the battery box lower case body of any one of claims 1 to 9.