CN216761462U

CN216761462U - High-performance battery pack tray

Info

Publication number: CN216761462U
Application number: CN202123392853.9U
Authority: CN
Inventors: 陈宗旭; 荣一鸣; 杨琨; 张志猛; 李忠勇; 陈亨津
Original assignee: Keller Nanjing New Material Technology Co ltd; Nanjing Lingrong Material Technology Co ltd; Shanghai Lingrong Mstar Technology Ltd
Current assignee: Keller Nanjing New Material Technology Co ltd; Nanjing Lingrong Material Technology Co ltd; Shanghai Lingrong Mstar Technology Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-06-17
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a high-performance battery pack tray, which comprises a shell, wherein edge beams are arranged on two sides of the shell, side protective beams are arranged on the edge beams, a front protective beam is arranged on the front part of the shell, expansion beams are respectively arranged on the front part, the middle part and the rear part of the shell, flanges are respectively arranged on the two side end parts of the shell, protruding ribs are arranged at the bottom of the shell, the side protective beams are rectangular, two sides of each side protective beam are provided with sunken parts, each edge beam comprises an upper plate and a lower plate, and corrugated parts in corrugated shapes are formed on the bottom edges of the lower plates through rolling; in this scheme, structural design that has adopted different materials in different positions has one kind to be the tray of rectangle, has satisfied use strength demand, rigidity demand and collision extrusion demand, and the side protection roof beam can improve the side collision security of battery package, protects inside electric core better, and the tray casing is by mould compression molding, and sealing performance is good, and thermal insulation performance is strong, can reduce battery package cooling system's consumption.

Description

High-performance battery pack tray

Technical Field

The utility model relates to a new energy automobile battery system, in particular to a high-performance battery pack tray.

Background

The battery pack tray is an important structural bearing part in a new energy automobile battery system, is used for containing and protecting batteries, battery thermal management parts and electrical elements in a battery pack, and has important influence on the collision safety of a whole automobile and the torsion and bending rigidity of the whole automobile body. The current battery package tray adopts the tray (aluminum alloy or steel welding) of single material structure, mainly leans on the welding seam in the aspect of sealed, and this has just led to the current battery package tray and has had high to welding process requirement, heat insulating sealing performance is poor, the welding seam easily produces the crackle under long-term vibration, the whole quality of tray and overweight scheduling problem.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims to provide a high-performance battery pack tray which has higher safety, can better protect internal battery cells, and has high sealing property and high heat insulation property.

The technical scheme is as follows: the utility model discloses a high-performance battery pack tray, which comprises a shell, wherein edge beams are arranged on two sides of the shell, side protective beams are arranged on the edge beams, a front protective beam is arranged on the front part of the shell, expansion beams are respectively arranged on the front part, the middle part and the rear part of the shell, flanges are respectively arranged at the two side end parts of the shell, a protruding rib is arranged at the bottom of the shell, the side protective beams are rectangular, two sides of each side protective beam are provided with a concave part, each edge beam comprises an upper plate and a lower plate, the lower plate is P-shaped and is provided with a bevel edge, the bottom edge of the lower plate is formed with a corrugated part in a corrugated shape through rolling, and the upper plate is Z-shaped.

In the technical scheme, the plurality of structures form the tray which is rectangular as a whole, and the side protective beams and the front protective beam can improve the overall instability resistance and energy absorption capacity and improve the safety of side collision; the boundary beam can improve the overall torsional rigidity and rigidity, and the expansion beam also has better rigidity and instability resistance, so that the battery core is better protected.

Preferably, the shell is a continuous fiber reinforced thermoplastic composite sheet material.

Preferably, the weight ratio of the composite shell to the frame consisting of the edge beams is 1: 2-1: 6.

Preferably, the wall thickness of the side protection beam is 1-3 mm, and the ratio of the height to the width is 1: 1-1: 3, the depth of the concave part is 3-10 mm, and the width is 10-20 mm.

Preferably, the top edge and the bottom edge of the upper plate are respectively provided with a glue storage groove.

Preferably, a composite material laminated structure is arranged below the bottom of the shell.

Preferably, the expansion beam comprises a U-shaped plate arranged below the shell and a rectangular pipe arranged above the shell and spliced with the U-shaped plate, the left side and the right side of the expansion beam are respectively provided with a laser welding seam, and the rectangular pipe and the U-shaped plate are respectively provided with a bolt mounting hole.

Preferably, the expansion beam is installed on the shell through a bolt and a spacer bush, a glue layer is arranged between the expansion beam and the shell, a stepped hole is formed in the spacer bush, and a sealing layer is arranged between the expansion beam and the shell.

Preferably, the expansion beam is formed into a cross section in a shape like a Chinese character ri through rolling, welding seams are respectively arranged on the left side and the right side of the expansion beam, and bolt mounting holes are formed in the expansion beam.

Preferably, the expansion beam is formed into a cross section in a shape like a Chinese character ri through roll forming, inward flanges are formed at the splicing positions of the two sides of the expansion beam, welding seams are arranged outside the inward flanges, and bolt mounting holes are further formed in the expansion beam.

Has the advantages that: compared with the prior art, the utility model has the advantages that: 1. the high-strength rectangular frame structure is formed by surrounding the shell made of the composite material by the side beams, so that the overall anti-extrusion and intrusion capabilities are improved, and the collision safety is high; 2. the side protective beam can improve the anti-instability and energy absorption effects of the rectangular section, and further improves the side collision safety of the whole battery pack.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic perspective and side view of the housing of the present invention;

FIG. 3 is a schematic side view of the housing of the present invention;

FIG. 4 is a schematic structural view of a side guard beam according to the present invention;

FIG. 5 is a schematic view of the construction of the edge beam of the present invention;

FIG. 6 is a cross-sectional view of an expansion beam according to the present invention;

FIG. 7 is a cross-sectional view taken along line A-A of the tray for a battery pack of the present invention;

fig. 8 is a cross-sectional view of the tray for battery pack of the present invention taken along line B-B;

FIG. 9 is a schematic view of the structure of two spacers of the present invention;

fig. 10 is another schematic structural view of the expansion beam of the present invention;

fig. 11 is a schematic view of another structure of the expansion beam of the present invention.

Detailed Description

The technical scheme of the utility model is further explained by combining the attached drawings.

As shown in fig. 1, the high-performance battery pack tray includes a housing 4, side beams 3 are disposed on two sides of the housing 4, side protective beams 1 are disposed on the side beams 3, a front protective beam 7 is disposed on the front portion of the housing 4, and expansion beams 5-1, 5-2, and 5-3 are respectively disposed on the front portion, the middle portion, and the rear portion of the housing 4.

Specifically, the housing 4 is a composite housing that can be prepared by a feed molding process, a wet molding process, a thermoplastic composite molding process, or a high pressure resin transfer molding process. Structurally, as shown in fig. 2, two side ends of the shallow basin are respectively provided with a flange 4-1 and a flange 4-2 to form a shallow basin structure, and a raised rib 4-3 can be arranged at the bottom of the shell 4 according to the requirements of the vehicle type. In addition, as shown in fig. 3, the shell 4 may be a sandwich structure, which can improve the thermal insulation performance, flatness and rigidity. The core material 4/1 is located under the bottom of the housing 4, forming a local protrusion, and is pressed through the prepreg sheet from the bonding surface 4/2 to the upper flange. Furthermore, the shell can be made of a continuous fiber reinforced thermoplastic composite material, the heat conductivity coefficient of the shell is far lower than that of common steel and aluminum alloy, and the shell has good heat insulation performance and can reduce the power consumption of a battery pack cooling system.

In terms of weight, the weight ratio of the composite material shell to a frame formed by the edge beams is 1: 2-1: 6.

As shown in FIG. 4, the side guard beam 1 is rectangular, the wall thickness is 1-3 mm, and the ratio of the height to the width is 1: 1-1: 3. The two sides of the side protection beam 1 are provided with concave parts 1-1, the depth of the concave parts is 3-10 mm, and the width of the concave parts is 10-20 mm. The ultra-high strength steel is integrally formed by rolling, the yield strength is high (900-1200 Mpa), the intrusion amount is smaller than that of a common steel or aluminum alloy structure under the same condition, and the buckling resistance and energy absorption effect of the rectangular section can be further improved by the aid of the concave parts 1-1, so that the safety of integral side collision is improved, and the battery cell is better protected.

As shown in FIG. 5, the edge beam 3, 3-1 comprises an upper plate 3-1-2 and a lower plate 3-1-1, wherein the lower plate 3-1-1 is in a "P" shape and is formed with a bevel edge, the bottom edge of the lower plate is formed with a corrugated portion 3-1-5 in a corrugated shape by rolling for improving structural rigidity, the upper plate 3-1-2 is in a "Z" shape, the top edge and the bottom edge of the upper plate are respectively provided with a glue storage groove 3-1-3 and a glue storage groove 3-1-4, and the upper plate 3-1-2 and the lower plate 3-1-1 are connected by two laser welding lines 3-1-6 and 3-1-7 and a plurality of rows of welding lines 3-1-9. Therefore, the side beam structure which is rectangular as a whole is formed, the extrusion resistance and the invasion resistance of the whole tray are improved, and the collision safety is further improved.

As shown in figure 6, the figure is a cross-sectional view of an expansion beam 5-2, the cross section is in a shape of Chinese character 'ri', the cross section comprises a U-shaped plate 5-2-3 arranged below a shell 4 and a rectangular pipe 5-2-1 arranged above the shell 4 and spliced and welded with the U-shaped plate 5-2-3, the left side and the right side of the expansion beam 5-2 are respectively provided with a laser welding seam 5-2/1 and 5-2/2, and bolt mounting holes 5-2/4 and 5-2/5 are further arranged on the rectangular pipe 5-2-1 and the U-shaped plate 5-2-3.

As shown in fig. 7, which is a sectional view a-a of a tray 1-00 of a battery pack, wherein a side guard beam 1 and a side beam 3-1 are connected by a bead weld 1-00-1 distributed up and down, the side beam 3-1 and a flange at the upper part of a flange of a case 4 are connected by a glue layer 1-00-2, and the bottom of the case 4 is connected by a glue layer 1-00-3 and the side beam 3-1.

As shown in fig. 8, which is a B-B sectional view of a tray 1-00 for a battery pack, an expansion beam 5-2 is sequentially passed through a hollow welding spacer disposed in the expansion beam 5-2, a case 4 and a threaded welding spacer 5-2-2 disposed in an expansion beam connection pipe 5-2-3 by a connection bolt 5-2-4, whereby the bolt 5-2-4 is in threaded engagement with the threaded welding spacer 5-2-2, and a glue layer 1-00-5 is provided on a mating surface of the expansion beam 5 and the case 4, and a sealing layer 1-00-4 is provided on a mating surface between the case 4 and the expansion beam connection pipe 5-2-3. The glue film can play the effect of being connected, buffering between casing and the boundary beam, also can avoid the boundary beam to the direct friction of casing and extrusion, releases the internal stress that produces because of the thermal expansion coefficient difference between the different materials.

As shown in fig. 9, the side spacer 2 is cylindrical, has a stepped hole therein, is embedded in the side guard beam 1, and is connected by an upper and a lower welding seams 2-1. The interior of the front spacer 6 is also provided with a step hole, embedded in the front protective beam 7 and connected by an upper welding line 6-1 and a lower welding line 6-1. The spacer bush not only provides the installation hard spot of automobile body and battery package tray, can also prevent that side protective beam 1 from taking place local conquassation when big torsion, strengthens the rigidity and the modal frequency of whole battery package tray simultaneously.

In addition, as shown in fig. 10, the expansion beam 5-2 may be in the form of a cross section formed in a zigzag shape by roll forming as a whole, and has a weld joint 5-2/1, 5-2/2 on the left and right sides, respectively, and mounting holes 5-2/3 and 5-2/4 formed therein.

This is a new form of expansion beam 5-2, shown in figure 11, which is also roll formed in its entirety with a herringbone cross section and forms inward flanges 5-2-6 at the splice at both sides, and also has welds 5-2/1 and 5-2/2 on the outside of the flanges 5-2-6 and mounting holes 5-2/3 and 5-2/4 in the middle.

Claims

1. The utility model provides a high performance battery package tray, its characterized in that, includes the casing, the both sides of casing are equipped with the boundary beam, be equipped with side guard beam on the boundary beam, the front portion of casing is equipped with preceding guard beam, the front portion, middle part and the rear portion of casing are equipped with the expansion beam respectively, the both sides tip of casing does not is equipped with the turn-ups, the bottom of casing is equipped with protruding muscle, side guard beam is the rectangle just the both sides of side guard beam are equipped with the depressed part, the boundary beam includes upper plate and hypoplastron, the hypoplastron is "P" type and is formed with the hypotenuse, the base of hypoplastron has the ripple portion that is corrugated ripple form through roll-in shaping, the upper plate is "Z" type.

2. The high performance battery pack tray of claim 1, wherein the housing is a continuous fiber reinforced thermoplastic composite sheet.

3. The tray as claimed in claim 2, wherein the weight ratio of the composite housing to the frame formed by the plurality of side beams is in the range of 1: 2-1: 6.

4. The tray for high-performance battery packs as claimed in claim 1, wherein the wall thickness of the side protective beam is 1-3 mm, and the ratio of the height to the width is 1: 1-1: 3, wherein the depth of the concave part is 3-10 mm, and the width of the concave part is 10-20 mm.

5. The tray as claimed in claim 1, wherein the top and bottom edges of the upper plate are provided with glue storage grooves, respectively.

6. The high performance battery pack tray of claim 1, wherein a composite laminate structure is provided under the bottom of the housing.

7. The tray as claimed in claim 1, wherein the expansion beam comprises a U-shaped plate disposed below the housing and a rectangular tube disposed above the housing and connected to the U-shaped plate, the expansion beam has laser welds on its left and right sides, and the rectangular tube and the U-shaped plate have bolt mounting holes.

8. The tray as claimed in claim 1, wherein the expansion beam is mounted on the housing by bolts and spacers, a glue layer is provided between the expansion beam and the housing, the spacers are provided with stepped holes, and a sealing layer is provided between the expansion beam and the housing.

9. The tray as claimed in claim 1, wherein the expansion beam is roll-formed to have a cross-section of a shape of a Chinese character ri, and welding lines are provided on left and right sides of the expansion beam, respectively, and bolt mounting holes are provided on the expansion beam.

10. The tray as claimed in claim 1, wherein the expansion beam is formed into a cross-section of a shape like a Chinese character ri by roll forming, inward flanges are formed at the splicing parts of the two sides of the expansion beam, welding seams are arranged outside the flanges, and bolt mounting holes are further formed in the expansion beam.