CN219457817U

CN219457817U - High-pressure casting spliced battery box

Info

Publication number: CN219457817U
Application number: CN202223326948.5U
Authority: CN
Inventors: 盛雯雯; 刘旭龙; 王大桢; 余林翰
Original assignee: Ningbo Xintai Machinery Co Ltd
Current assignee: Ningbo Xintai Machinery Co Ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-08-01
Anticipated expiration: 2032-12-12

Abstract

The utility model belongs to the technical field of die casting, and provides a high-pressure casting spliced battery box. The utility model has the advantages that the number of parts is integrated into two castings from dozens, the integration level is higher, the weight is lighter, the dimensional stability is better, the BEV battery box is welded by the two castings, and the mass production of the BEV battery box is realized by a small-tonnage die casting machine.

Description

High-pressure casting spliced battery box

Technical Field

The utility model belongs to the technical field of die casting, and relates to a high-pressure casting spliced battery box.

Background

The integrated die casting device has the advantages of cost reduction and dead weight reduction, and more whole factories are likely to adopt an integrated die casting scheme in the future. The new energy automobile battery assembly accounts for 18-20% of the whole automobile weight, wherein a battery pack shell (battery box) accounts for about 10-20% of the battery pack weight, and the battery box is a part of the battery pack with the weight ratio being inferior to that of the battery core. After the energy density of the battery is improved gradually to enter a bottleneck period, the lightweight battery box becomes an important field of new energy automobiles. The traditional battery box is generally assembled by several tens of stamping parts in a split mode through various connecting processes such as welding, screwing, cementing and the like, and the chain length of the battery box is required to be welded in a split mode, so that the dimensional stability is poor. The connection reliability is poor, the welding quality of the split welding battery box is difficult to manage and control, the welding deformation is large, the strength of a welding seam area is not as high as that of a base material, defects are easy to occur, the problem of welding air holes is solved, the tightness is difficult to guarantee, the ultra-large integrated casting process is immature, the stability of a product is difficult to guarantee, the flowability of the current material is limited, and the requirement of the mechanical property of the far end of an ultra-large casting cannot be guaranteed.

Disclosure of Invention

The utility model aims at solving the technical problem of the prior art, and provides a high-pressure casting spliced battery box which is higher in integration level, lighter in weight and better in dimensional stability.

The technical scheme adopted for solving the technical problems is as follows: the high-pressure casting spliced battery box is characterized by being formed by splicing a first casting and a second casting, wherein the first casting and the second casting are formed by high-pressure casting respectively, and a splicing structure is arranged at the splicing position of the first casting and the second casting.

In the high-pressure casting spliced battery box, the spliced structure comprises a plurality of assembly holes formed in the first casting and the second casting, and bolts are installed at the assembly holes.

In the high-pressure casting spliced battery box, the first casting and the second casting are respectively provided with the step matching surfaces, and the step matching surfaces of the first casting and the second casting are mutually overlapped.

In the high-pressure casting spliced battery box, the step matching surface is provided with a stirring friction welding bead.

In the high-pressure casting spliced battery box, the middle positions of the first casting and the second casting are provided with the middle reinforcing ribs.

In the high-pressure casting spliced battery box, the first casting is provided with the water inlet and the water outlet and the high-low pressure connector, and the crescent reinforcing ribs are arranged on the back surfaces of the water inlet and the water outlet and the high-low pressure connector.

In the high-pressure casting spliced battery box, the side edges of the first casting and the second casting are provided with the side anti-collision energy absorbing ribs.

Compared with the prior art, the utility model has the advantages that the number of parts is integrated into two castings from dozens, the integration level is higher, the weight is lighter, the dimensional stability is better, the BEV battery box is welded by the two castings, and the mass production of the BEV battery box is realized by a small-tonnage die casting machine.

Drawings

Fig. 1 is a schematic view of a structure of a high-pressure casting spliced battery box before splicing;

fig. 2 is a schematic view of a structure of a spliced battery case of a high-pressure casting;

fig. 3 is a schematic view of the back structure of the high-pressure casting spliced battery case.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present utility model.

In the figure, a first casting 100; a second casting 200; a module fixing point 300; a fitting hole 400; a bolt 500; a step mating surface 600; stirring the friction welding bead 700; a middle reinforcing rib 800; a water inlet/outlet 900; high and low voltage interface 1000; crescent stiffener 1001; side impact absorbing ribs 1002.

As shown in fig. 1 and 2, this high-pressure casting splice battery case, this battery case is formed by the concatenation of first foundry goods 100 and second foundry goods 200, first foundry goods 100 and second foundry goods 200 are high-pressure casting respectively, splice structure has in the concatenation department of first foundry goods 100 and second foundry goods 200, this first foundry goods 100 and second foundry goods 200 are provided with a plurality of module fixed points 300, for the convenience of concatenation, splice structure is including seting up a plurality of pilot holes 400 on first foundry goods 100 and second foundry goods 200, install bolt 500 in pilot hole 400 department, be provided with step mating face 600 on first foundry goods 100 and the second foundry goods 200, step mating face 600 of both first foundry goods 100 and second foundry goods 200 overlap joint each other, splice into BEV battery case through two foundry goods, compare the battery case that the tradition was assembled through multiple connection technologies such as welding, the spiro union, glue joint, this battery case size chain is shorter, the problem of the precision difference that the precision that the tradition battery case was because the assembly level is too much, can satisfy the battery case is assembled in order, can satisfy the automatic centering accuracy requirement of two parts each other through step mating face 600, it can satisfy the sealed performance to assemble in the process to let two parts. In addition, through the cold connection mode of the bolts 500, the connection strength of the battery box is guaranteed, in addition, the stirring friction welding bead 700 is arranged on the step matching surface 600, the process of the stirring friction welding bead 700 is adopted, the tightness of the connection position is guaranteed, the middle positions of the first casting 100 and the second casting 200 are respectively provided with a middle reinforcing rib 800, the middle reinforcing ribs 800 play a role in increasing the torsional rigidity of the battery box assembly, the first casting 100 is provided with a water inlet 900 and a high-low pressure port 1000, as shown in fig. 3, crescent reinforcing ribs 1001 are arranged on the back surfaces of the water inlet 900 and the high-low pressure port 1000, side anti-collision energy absorbing ribs 1002 are arranged on the side edges of the first casting 100 and the second casting 200, the high-low pressure joint socket and the water inlet 900 are integrated on the first casting 100, the size stability and the tightness are relatively good, the crescent reinforcing ribs 1001 and the side anti-collision energy absorbing ribs 1002 mainly aim at absorbing collision energy, and avoiding collision force to be directly conducted to the battery module, and further safety accidents such as battery explosion are caused.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. The high-pressure casting spliced battery box is characterized by being formed by splicing a first casting and a second casting, wherein the first casting and the second casting are formed by high-pressure casting respectively, and a splicing structure is arranged at the splicing position of the first casting and the second casting.

2. The high pressure cast splice battery compartment of claim 1 wherein the splice structure includes a plurality of mounting holes formed in the first casting and the second casting, the mounting holes having bolts mounted therein.

3. The high-pressure casting spliced battery box according to claim 2, wherein the first casting and the second casting are provided with step matching surfaces, and the step matching surfaces of the first casting and the second casting are mutually overlapped.

4. A high pressure cast splice battery case as defined in claim 3, wherein said step mating surface has a friction stir welding bead thereon.

5. The high pressure cast splice battery compartment of claim 4, wherein the first casting and the second casting are provided with intermediate strengthening ribs at intermediate locations.

6. The high-pressure casting spliced battery box according to claim 5, wherein the first casting is provided with a water inlet and a water outlet and a high-low pressure connector, and crescent reinforcing ribs are arranged on the back surfaces of the water inlet and the water outlet and the high-low pressure connector.

7. The high pressure cast splice battery compartment of claim 6, wherein the side edges of the first casting and the second casting are provided with side impact absorbing ribs.