CN219026381U

CN219026381U - Split die-casting type electric automobile battery chassis and welding tool

Info

Publication number: CN219026381U
Application number: CN202221218914.1U
Authority: CN
Inventors: 郭音; 童文辉; 蔡倩; 董文亮
Original assignee: Shenyang Yuchengxin Achievement Transformation Technology Service Co ltd
Current assignee: Shenyang Yuchengxin Achievement Transformation Technology Service Co ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2023-05-16
Anticipated expiration: 2032-05-19

Abstract

The utility model relates to a split die-casting type electric automobile battery chassis and a welding tool, wherein the battery chassis comprises two respectively die-casting formed tray bodies, the two tray bodies are symmetrically arranged and welded, battery module sockets are arranged on the two tray bodies, and an isolation reinforcing rib group is arranged between the battery module sockets on two sides; the welding fixture comprises an upper fixture and a lower fixture, wherein the upper fixture comprises a middle frame body, the two sides of the middle frame body are respectively provided with an upper frame body, the two sides of the inner part of the middle frame body are respectively provided with an upper clamping bolt, the lower fixture comprises a bottom frame, the two sides of the upper end of the bottom frame are respectively provided with a lower frame body, the adjacent sides of the two lower frame bodies are respectively provided with a lower clamping bolt, the two disc bodies are respectively clamped and fixed through the corresponding upper frame body and the lower frame body during welding, and the welding sides of the two disc bodies are respectively clamped and fixed through the upper clamping bolts and the lower clamping bolts of the corresponding sides. The utility model meets the production requirement of the large battery chassis, has simple operation process and does not influence the production efficiency.

Description

Split die-casting type electric automobile battery chassis and welding tool

Technical Field

The utility model relates to the field, in particular to a split die-casting type electric automobile battery chassis and a welding tool.

Background

The power battery is used as one of three core technologies of the electric automobile, the usability, the reliability and the safety of the electric automobile are determined to a great extent, the battery chassis is used as a supporting body of the power battery, the power battery plays a key role in the safety work and the protection of the battery module, the strength and the rigidity of the battery chassis are required in the prior art, and the protection level of the electric equipment shell is designed according to IP 67.

At present, light weight is an important development direction of electric automobiles, in the prior art, the light weight design purpose can be achieved by changing chassis materials, and the weight reduction of the automobiles is generally achieved by replacing steel battery chassis with aluminum battery chassis. The aluminum profile splice welding battery chassis is widely applied in the prior art, but aluminum profile splice welding has great limitation on flexible design of the battery chassis structure, the welding lines of the aluminum profile splice welding are more and the process is complex, any one sealing welding line defect can lead to the sealing failure of the whole battery chassis, and meanwhile, more welding lines also mean that the whole battery chassis is more serious in deformation and more difficult in dimensional tolerance control of each part installation interface in the chassis. In addition, for the cooperation welding, the frock clamp that is used for battery chassis welded among the prior art is also comparatively complicated, for example has disclosed an electric automobile battery chassis welding tool in the chinese utility model patent of grant bulletin number CN211331955U, and its wheel hub upper end is equipped with first mounting panel, first mounting panel upper end fixed vehicle bottom support, vehicle bottom support handing-over department lower extreme is equipped with the welding piece, and vehicle bottom support upper end is connected with the bottom plate, is equipped with a plurality of holes on the bottom plate, and installs relevant fixture mechanism on each hole and realize the welding of various parts positioning. For example, the utility model patents with the issued publication numbers of CN216264166U and CN216264169U respectively disclose an automatic welding fixture for a battery chassis of novel batteries in different types, and a plurality of compressing and positioning cylinders are arranged along the edge of a tray to realize positioning.

Besides the sectional material splice welding, the aluminum alloy can also be manufactured by a one-step die-casting molding technology, and the method has the advantages of good stability, short manufacturing period, high corrosion resistance and the like, but is greatly restricted by die-casting equipment. At present, the foreign die casting machine can achieve about 7200t, but the common die casting machine in the domestic market is 4500t, and die castings of 1.4mx1.4m can be formed by one-step die casting. For the battery chassis of the electric automobile, the existing die casting equipment cannot realize one-step die casting molding of a chassis product (1.6mx2m, theoretically a die casting machine 16000 t) with a larger volume, and the production requirement of the product cannot be met.

Disclosure of Invention

The utility model aims to provide a split die-casting type electric automobile battery chassis and a welding tool, wherein the split die-casting type electric automobile battery chassis is divided into a first chassis body and a second chassis body which can be respectively and independently die-cast and formed, and then the first chassis body and the second chassis body are formed into a finished battery chassis body in a welding mode, so that the production requirement of a large-scale battery chassis is met, the operation process is simple, and the production efficiency is not influenced.

The aim of the utility model is realized by the following technical scheme:

the utility model provides a components of a whole that can function independently die-casting electric automobile battery chassis, includes first disk body and second disk body, first disk body and second disk body are die-casting shaping, just first disk body and second disk body symmetry set up and welded connection, be equipped with first battery module socket on the first disk body, be equipped with second battery module socket on the second disk body to be equipped with between first battery module socket and the second battery module socket and keep apart the strengthening rib group.

The isolation reinforcing rib group comprises transverse ribs and longitudinal ribs, wherein the transverse ribs are arranged along the width direction of the tray body and are respectively arranged on the first tray body and the second tray body, and the longitudinal ribs are arranged along the length direction of the tray body and are arranged between the transverse ribs.

The first tray body is characterized in that first edge side plates extending outwards horizontally are formed on two sides of the width direction of the first tray body, second edge side plates extending outwards horizontally are arranged on all sides of the second tray body except for the welding side close to the first tray body, mounting holes are formed in the first edge side plates and the second edge side plates, and the first edge side plates and the second edge side plates on the corresponding sides are welded correspondingly.

The first disk body is kept away from second disk body one side forms the end plate that extends outwards horizontally, end plate length is greater than first edge curb plate and is equipped with the interface of hanging of being connected with the automobile body.

According to components of a whole that can function independently die-casting formula electric automobile battery chassis's welding frock, draw together anchor clamps and lower anchor clamps, go up anchor clamps and include well framework, just well framework one side is equipped with first last framework, opposite side is equipped with the second and goes up the framework, well framework inside both sides all are equipped with clamping bolt, lower anchor clamps include the chassis, and chassis upper end one side is equipped with first lower framework, opposite side is equipped with the second and goes down the framework, first lower framework all is equipped with down clamping bolt with the adjacent side of second lower framework, during the welding first framework is through first last framework and first lower framework clamp fastening, the second framework is through second last framework and second lower framework clamp fastening, the welding side of first framework and the welding side of second framework are respectively through the last clamping bolt and the lower clamping bolt clamp fastening of corresponding side, form the welding gap between the clamping bolt on the inside both sides of well framework.

The inner side of the middle frame body is provided with upper fixing plates at two sides, welding gaps are formed between the upper fixing plates at two sides, and the upper clamping bolts are respectively arranged on the corresponding upper fixing plates.

The upper side of the middle part of the underframe is provided with two fixed beams, the adjacent sides of the two fixed beams are respectively provided with a lower fixed plate, the lower clamping bolts are respectively arranged on the corresponding lower fixed plates, and the first lower frame body and the second lower frame body are respectively connected with the corresponding fixed beams.

The fixed beam is characterized in that second upper fixing seats are arranged on two sides of the end part of the middle frame body, second lower fixing seats are arranged on the end part of the fixed beam, and the second upper fixing seats are connected with the corresponding second lower fixing seats through second bolts.

The first upper frame body is far away from one end of the middle frame body and one end of the second upper frame body is far away from one end of the middle frame body, a first upper fixing seat is arranged on the first lower frame body, the first lower frame body is far away from one end of the bottom frame, the second lower frame body is far away from one end of the bottom frame, a first lower fixing seat is arranged on the second lower frame body, and the first upper fixing seat and the corresponding first lower fixing seat are connected through a first bolt.

The flexible buffer blocks are arranged on the lower side of the first upper frame body, the lower side of the second upper frame body and the upper sides of the first lower frame body and the second lower frame body.

The utility model has the advantages and positive effects that:

1. the battery chassis is divided into the first tray body and the second tray body which can be respectively and independently die-cast and formed, and then the first tray body and the second tray body are formed into the finished battery tray body in a welding mode, because the tray bodies on two sides are manufactured by adopting a die-casting process, the strength of the tray body is better, the production efficiency is higher, and meanwhile, only the two tray bodies are welded and connected, the operation process is simple, the production efficiency is not influenced by excessive working procedures, and the production requirement of the large-scale battery chassis is met.

2. The welding tool provided by the utility model has the advantages that the frame body structure is utilized to correspondingly clamp the first disc body and the second disc body in a matched manner, so that the hollow part of the frame body can accommodate the corresponding structure on the disc body without interference while the disc body is accurately positioned.

3. According to the utility model, the welding side of the first disc body and the welding side of the second disc body are respectively clamped and fixed through the upper clamping bolt and the lower clamping bolt on the corresponding sides of the welding tool, so that the deviation can not occur during welding, the first bolt and the second bolt on the welding tool are matched with the upper clamping bolt and the lower clamping bolt to realize clamping and positioning of the disc bodies on the two sides, meanwhile, the displacement in the length direction and the width direction of the disc bodies is limited, the distance between the frame bodies and the compression force can be adjusted through screwing the corresponding bolts, the welding tool can be suitable for welding the disc bodies with different specifications, and the use is more flexible.

Drawings

Figure 1 is a schematic view of the battery chassis structure of the present utility model,

figure 2 is a schematic diagram of the welding tool structure of the utility model,

figure 3 is a front view of the welding tool of figure 2,

figure 4 is a top view of the welding tool of figure 2,

fig. 5 is a schematic structural diagram of another embodiment of the welding tool of the present utility model.

Wherein 1 is a first tray, 101 is a first battery module socket, 102 is a first edge side plate, 103 is an end plate, 2 is a second tray, 201 is a second battery module socket, 202 is a second edge side plate, 3 is an upper clamp, 301 is a middle frame, 302 is a first upper frame, 303 is a second upper frame, 304 is an upper fixing plate, 305 is an upper clamping bolt, 306 is a first upper fixing base, 307 is a second upper fixing base, 308 is a notch, 4 is a lower clamp, 401 is a chassis, 402 is a first lower frame, 403 is a second lower frame, 404 is a fixing beam, 4041 is a lower fixing plate, 405 is a lower clamping bolt, 406 is a first lower fixing base, 407 is a second lower fixing base, 5 is a first bolt, 6 is a second bolt, 7 is a flexible buffer block, 8 is an isolation reinforcing rib group, 801 is a transverse rib, and 802 is a longitudinal rib.

Detailed Description

The utility model is described in further detail below with reference to the accompanying drawings.

As shown in fig. 1, the battery chassis of the present utility model includes a first tray body 1 and a second tray body 2, where the first tray body 1 and the second tray body 2 are integrally formed by die casting, and the first tray body 1 and the second tray body 2 are symmetrically disposed and welded, a concave portion formed by die casting on the first tray body 1 forms a first battery module socket 101, a concave portion formed by die casting on the second tray body 2 forms a second battery module socket 201, and automobile batteries are respectively placed in the corresponding battery module sockets.

As shown in fig. 1, an isolation reinforcing rib group 8 is disposed between the first battery module socket 101 and the second battery module socket 201, and the isolation reinforcing rib group 8 includes a transverse rib 801 and a longitudinal rib 802, wherein the transverse rib 801 is disposed along the width direction of the tray body and is disposed on the first tray body 1 and the second tray body 2 respectively, and the longitudinal rib 802 is disposed along the length direction of the tray body and is disposed between the transverse ribs 801. Besides enhancing the strength of the battery chassis, the isolated areas inside the isolation reinforcing rib groups 8 can be used for placing corresponding battery matched equipment according to actual needs.

As shown in fig. 1, two sides of the width direction of the first disc 1 are provided with a first edge side plate 102 extending horizontally and outwards, one side of the first disc 1 far away from the second disc 2 is provided with an end plate 103 extending horizontally and outwards, both the first edge side plate 102 and the end plate 103 are provided with mounting holes, in addition, the length of the end plate 103 is longer than that of the first edge side plate 102 and is provided with a hanging interface connected with a vehicle body, each side of the second disc 2 except for the welding side close to the first disc 1 is provided with a second edge side plate 202 extending horizontally and outwards, the second edge side plate 202 is also provided with a mounting hole, and the first edge side plate 102 and the second edge side plate 202 on the corresponding side are correspondingly welded.

As shown in fig. 2 to 4, the welding fixture of the present utility model includes an upper fixture 3 and a lower fixture 4, where the upper fixture 3 includes a middle frame 301, one side of the middle frame 301 is provided with a first upper frame 302, the other side is provided with a second upper frame 303, both sides inside the middle frame 301 are provided with upper clamping bolts 305, the lower fixture 4 includes a bottom frame 401, one side of the upper end of the bottom frame 401 is provided with a first lower frame 402, the other side is provided with a second lower frame 403, during welding, an edge side plate of the first disk 1 is clamped and fixed by the first upper frame 302 and the first lower frame 402, an edge side plate of the second disk 2 is clamped and fixed by the second upper frame 303 and the second lower frame 403, hollow areas of the respective upper frame and the lower frame are used for accommodating the first battery module socket 101, the second battery module socket 201 and other structures, the adjacent sides of the first lower frame 402 and the second lower frame 403 are provided with lower clamping bolts 405, and the welding side of the first disk 1 and the second disk 2 are clamped and fixed by the corresponding upper clamping bolts 305 and the lower clamping bolts 305, respectively, and the welding fixture is moved between the two sides of the welding fixture 301 and the welding fixture 4 is realized.

As shown in fig. 2 to 4, in this embodiment, the two sides of the inner portion of the middle frame 301 are respectively provided with an upper fixing plate 304, the welding gap is formed between the upper fixing plates 304 on the two sides, and the upper clamping bolts 305 are respectively mounted on the corresponding upper fixing plates 304.

As shown in fig. 2 to 3, in this embodiment, two fixing beams 404 are disposed on the upper side of the middle portion of the chassis 401, adjacent sides of the first lower frame 402 and the second lower frame 403 are respectively mounted on the corresponding fixing beams 404, adjacent sides of the two fixing beams 404 are respectively provided with a lower fixing plate 4041, and the lower clamping bolts 405 are respectively mounted on the corresponding lower fixing plates 4041.

As shown in fig. 1, the middle part of the battery chassis of the electric automobile is provided with the isolation reinforcing rib group 8, the utility model can firstly not provide the isolation reinforcing rib group 8 on the two side disk bodies, the first disk body 1 and the second disk body 2 are integrally molded into a structure of a first battery module socket 101, a second battery module socket 201, a first edge side plate 102, a second edge side plate 202, an end plate 103 and the like through die casting, then the two side disk bodies are welded and connected, finally the isolation reinforcing rib group 8 is welded and installed, the two side disk bodies can also be die-cast together with the isolation reinforcing rib group 8 during die casting, then the two side disk bodies are welded and connected, at the moment, the upper clamping bolt 305 and the lower clamping bolt 405 are divided into a plurality of groups, gaps between the adjacent groups of bolts can accommodate the corresponding longitudinal rib 802 shown in fig. 1, and simultaneously, as shown in fig. 5, the corresponding frame bodies are also provided with notches 308 to avoid the longitudinal rib 802 structure.

As shown in fig. 2 to 3, in this embodiment, the end of the first upper frame 302 away from the middle frame 301 and the end of the second upper frame 303 away from the middle frame 301 are both provided with a first upper fixing base 306, the end of the first lower frame 402 away from the chassis 401 and the end of the second lower frame 403 away from the chassis 401 are both provided with a first lower fixing base 406, and the first upper fixing base 306 and the corresponding first lower fixing base 406 are connected by a first bolt 5, so as to cooperate with the upper clamping bolt 305 and the lower clamping bolt 405 to realize clamping positioning of two side disc bodies and limit displacement of the disc body in the length direction.

As shown in fig. 2 to 3, in this embodiment, two sides of the end portion of the middle frame 301 are respectively provided with a second upper fixing seat 307, the end portion of the fixing beam 404 on the bottom frame 401 is respectively provided with a second lower fixing seat 407, and the second upper fixing seat 307 is connected with the corresponding second lower fixing seat 407 through a second bolt 6, so as to cooperate with the upper clamping bolt 305 and the lower clamping bolt 405 to realize clamping positioning of two side disc bodies and limit displacement in the width direction of the disc body.

As shown in fig. 2 to 3, the lower sides of the first upper frame 302, the second upper frame 303, and the upper sides of the first lower frame 402 and the second lower frame 403 are respectively provided with a flexible buffer block made of silica gel or other flexible materials to avoid damaging the tray during positioning. In addition, flexible clamping blocks can be arranged at the end parts of the upper clamping bolt 305 and the lower clamping bolt 405 according to the requirement so as to avoid clamping the disc body.

The working principle of the utility model is as follows:

the utility model mainly aims at a large battery chassis, a die casting machine with the largest specification seen in the market at present is 4500t, the one-time die casting size is 1.4m multiplied by 1.4m, and the one-time die casting forming cannot be realized at present for the large battery chassis like 1.8 m multiplied by 2m, so the utility model adopts a split die casting mode to divide the battery chassis into a first tray body 1 and a second tray body 2 which can be respectively and independently die-cast formed, then the first tray body 1 and the second tray body 2 are connected in a welding mode to form a finished battery tray body, and in order to ensure the welding positioning and alignment of the first tray body 1 and the second tray body 2, the welding fixture of the utility model respectively clamps the first tray body 1 and the second tray body 2 in a corresponding matching way by utilizing structures such as a first upper frame body 302, a second upper frame body 303, a first lower frame body 402, a second lower frame body 403 and the like, the disc body is guaranteed to be positioned accurately, the hollow part of the frame body can accommodate the corresponding structure on the disc body, interference cannot occur, the welding side of the first disc body 1 and the welding side of the second disc body 2 are clamped and fixed through the upper clamping bolt 305 and the lower clamping bolt 405 on the corresponding sides respectively, deflection cannot occur during welding, the first bolt 5 and the second bolt 6 are matched with the upper clamping bolt 305 and the lower clamping bolt 405 to achieve clamping positioning of the two side disc bodies, meanwhile, displacement in the length direction and the width direction of the disc body is limited, the distance between the frame bodies and the compression force can be adjusted through screwing the corresponding bolts, the welding gun is more flexible to use, after the two side disc bodies are fixed, the welding gun moves along a welding gap in the middle frame body 301 to achieve welding operation, and meanwhile, the middle frame body 301 can also play a certain protection role, and welding sparks are prevented from splashing. In addition, the isolation reinforcing rib group 8 on the battery chassis of the utility model can be welded and installed after the whole chassis is welded, or can be integrally die-cast together with the first chassis 1 and the second chassis 2, at this time, the upper clamping bolt 305 and the lower clamping bolt 405 are divided into a plurality of groups, and the gaps between the adjacent groups of bolts can accommodate the longitudinal rib 802 shown in fig. 1, and meanwhile, as shown in fig. 5, the corresponding frame is also provided with the notch 308 to avoid the longitudinal rib 802 structure.

Claims

1. The utility model provides a components of a whole that can function independently die-casting formula electric automobile battery chassis which characterized in that: including first disk body (1) and second disk body (2), first disk body (1) and second disk body (2) are die casting shaping, just first disk body (1) and second disk body (2) symmetry set up and welded connection, be equipped with first battery module socket (101) on first disk body (1), be equipped with second battery module socket (201) on second disk body (2) to be equipped with between first battery module socket (101) and second battery module socket (201) and keep apart strengthening rib group (8).

2. The split die-cast electric vehicle battery chassis of claim 1, wherein: the isolation reinforcing rib group (8) comprises transverse ribs (801) and longitudinal ribs (802), wherein the transverse ribs (801) are arranged along the width direction of the disc body and are respectively arranged on the first disc body (1) and the second disc body (2), and the longitudinal ribs (802) are arranged along the length direction of the disc body and are arranged between the transverse ribs (801).

3. The split die-cast electric vehicle battery chassis of claim 1, wherein: the two sides of the width direction of the first disc body (1) are provided with first edge side plates (102) extending horizontally and outwards, each side of the second disc body (2) except for a welding side close to the first disc body (1) is provided with second edge side plates (202) extending horizontally and outwards, mounting holes are formed in the first edge side plates (102) and the second edge side plates (202), and the first edge side plates (102) and the second edge side plates (202) at the corresponding sides are welded correspondingly.

4. A split die cast electric vehicle battery chassis as claimed in claim 3, wherein: an end plate (103) extending horizontally outwards is formed on one side, far away from the second plate body (2), of the first plate body (1), and the length of the end plate (103) is larger than that of the first edge side plate (102) and is provided with a hanging interface connected with a vehicle body.

5. A welding fixture for a battery chassis of a split die-cast electric vehicle according to claim 1, characterized in that: including last anchor clamps (3) and lower anchor clamps (4), go up anchor clamps (3) including well framework (301), just well framework (301) one side is equipped with first last framework (302), opposite side are equipped with second and go up framework (303), well framework (301) inside both sides all are equipped with clamping bolt (305), lower anchor clamps (4) include chassis (401), and chassis (401) upper end one side is equipped with first lower framework (402), opposite side are equipped with second lower framework (403), all be equipped with down clamping bolt (405) in the adjacent side of first lower framework (402) and second lower framework (403), during the welding first disk body (1) is through first last framework (302) and first lower framework (402) clamp fastening, second disk body (2) are through second last framework (303) and second lower framework (403) clamp fastening, the welding side of first disk body (1) and second disk body (2) are respectively through the upper side of corresponding side clamp bolt (305) clamp fastening bolt (305) in the welding side between the two.

6. The welding fixture for the battery chassis of the split die-casting electric automobile of claim 5, wherein the welding fixture is characterized in that: the two sides of the inner part of the middle frame body (301) are respectively provided with an upper fixing plate (304), the welding gaps are formed between the upper fixing plates (304) on the two sides, and the upper clamping bolts (305) are respectively arranged on the corresponding upper fixing plates (304).

7. The welding fixture for the battery chassis of the split die-casting electric automobile of claim 5, wherein the welding fixture is characterized in that: the upper side of the middle of the underframe (401) is provided with two fixed beams (404), the adjacent sides of the two fixed beams (404) are respectively provided with a lower fixed plate (4041), lower clamping bolts (405) are respectively arranged on the corresponding lower fixed plates (4041), and the first lower frame body (402) and the second lower frame body (403) are respectively connected with the corresponding fixed beams (404).

8. The welding fixture of the split die-casting type electric automobile battery chassis according to claim 7, wherein: the two sides of the end part of the middle frame body (301) are respectively provided with a second upper fixing seat (307), the end parts of the fixing beams (404) are respectively provided with a second lower fixing seat (407), and the second upper fixing seats (307) are connected with the corresponding second lower fixing seats (407) through second bolts (6).

9. The welding fixture for the battery chassis of the split die-casting electric automobile of claim 5, wherein the welding fixture is characterized in that: the first upper frame body (302) is far away from one end of the middle frame body (301) and one end of the second upper frame body (303) is far away from one end of the middle frame body (301) and is provided with a first upper fixing seat (306), the first lower frame body (402) is far away from one end of the bottom frame (401) and one end of the second lower frame body (403) is far away from one end of the bottom frame (401) and is provided with a first lower fixing seat (406), and the first upper fixing seat (306) and the corresponding first lower fixing seat (406) are connected through a first bolt (5).

10. The welding fixture for the battery chassis of the split die-casting electric automobile of claim 5, wherein the welding fixture is characterized in that: the flexible buffer blocks are arranged on the lower side of the first upper frame body (302), the lower side of the second upper frame body (303) and the upper sides of the first lower frame body (402) and the second lower frame body (403).