CN211828925U

CN211828925U - Connection structure for combined use of stirring welding and gluing on battery box body

Info

Publication number: CN211828925U
Application number: CN202020600578.1U
Authority: CN
Inventors: 黄亮; 刘伟
Original assignee: Newwick Precision Manufacturing Jiangsu Co ltd
Current assignee: Newwick Precision Manufacturing Jiangsu Co ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2020-10-30
Anticipated expiration: 2030-04-21

Abstract

The utility model discloses a connection structure that combination was used on battery box with glue is welded in stirring, including frame group and bottom plate, the welding has a plurality of crossbeams parallel with preceding frame and back frame between frame and the back frame before the frame is organized, the welding has and has the longeron that left side frame and right frame are parallel between left side frame and the right frame, sets up first glue storage groove on the crossbeam, sets up second glue storage groove on the longeron, and first glue storage groove and second glue storage groove department compress tightly the bottom plate after beating to glue and closely laminate with frame group, then weld the bottom plate through the stirring all around with frame group link. In this way, the utility model discloses the connection structure that the stirring was welded and was used with the adhesive combination on the battery box separates into several little regions with big bottom plate, and the stirring is welded and is glued with the structure and bond the bonding and use, can promote the bulk rigidity of bottom plate greatly, increases the life of battery box, can also reduce the risk of gas leakage.

Description

Connection structure for combined use of stirring welding and gluing on battery box body

Technical Field

The utility model relates to an automobile parts technical field especially relates to a connection structure that stir welding and gluing combined use on battery box.

Background

With the development of new energy vehicles greatly promoted by the country, the number of new energy vehicles is increased, and each whole vehicle factory establishes a respective battery PACK factory.

As a power source spring of a new energy automobile, the safety of a power battery pack is particularly important: the automobile has various jolt vibrations at the in-process of traveling, if each spare part not zonulae occludens, so long-time, can take place the displacement between the spare part, can produce resonance to make the part life-span reduce, increased driving risk greatly.

At present, most of power battery box bodies adopt the stirring welding mode of one circle around, and the problem of integral rigidity in the middle of a large bottom plate is greatly ignored.

As shown in fig. 1, in the prior art, the frame of the profile and the periphery of the back of the stamping bottom plate are connected by a circle of stir welding; then, the aluminum plate is subjected to the working procedures of blanking, punch forming, shaping, trimming and the like to finish the forming of the bottom plate, so that the aim of enhancing the rigidity of the bottom plate is fulfilled; splicing the frames, and welding the frames together by using two welding joints; and finally, rubbing by using a high-speed rotating stirring welding pin to ensure that the rubbing temperature reaches the melting point kk of the aluminum, the aluminum is changed into a molten state, and the high-speed rotation enables the aluminum of the cold plate and the aluminum of the frame to be stirred together, so that the welding effect is achieved.

However, the middle of the bottom plate is not connected with the upper transverse beam of the frame, so that the rigidity of the whole bottom plate is poor, the deformation resistance is low, the center of the bottom plate can shake along with the jolt of the vehicle in the driving process of the vehicle, and the stirring welding line can be torn after a long time, so that the driving safety is influenced.

The self-tapping screw is connected in a mode that the self-tapping screw is used, a through hole of the self-tapping screw is formed in the bottom plate, a bottom hole of the self-tapping screw is formed in the transverse and longitudinal beams of the frame, and the self-tapping screw achieves the purpose of self-tapping and locking through high-speed rotation. The defects are as follows: self-tapping through holes need to be processed in advance on the transverse longitudinal beams of the bottom plate and the frame, so that the processing cost is increased; the self-tapping screw with the glue falling part is used after the hole is formed in the bottom plate, and the risk of air leakage is also caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a connection structure who welds and glue combined use on battery box with the stirring, separates into several little regions with big bottom plate, and the stirring is welded and is glued with the structure and bond the combined use, can promote the bulk rigidity of bottom plate greatly, increases battery box's life, can also reduce the risk of gas leakage.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a connection structure that stirs and welds and glue and make up use on battery box, includes: a frame group and a bottom plate,

the frame group comprises a front frame, a left frame, a rear frame and a right frame which are welded and fixed together, a plurality of cross beams which are parallel to the front frame and the rear frame are welded between the front frame and the rear frame, a longitudinal beam which is parallel to the left frame and the right frame is welded between the left frame and the right frame,

the crossbeam is provided with a first glue storage groove, the longitudinal beam is provided with a second glue storage groove, the first glue storage groove and the second glue storage groove tightly press the bottom plate to enable the bottom plate to be tightly attached to the frame assembly after gluing, and then the periphery of the bottom plate is welded with the frame assembly through stirring.

In a preferred embodiment of the present invention, the size of the cross beam matches the size of the front frame and the size of the rear frame, and the size of the longitudinal beam matches the size of the left frame and the right frame.

In a preferred embodiment of the present invention, two first glue storage tanks are respectively disposed on the left and right sides of the beam.

In a preferred embodiment of the present invention, the second glue storage groove on the longitudinal beam extends from the left side to the right side along the longitudinal direction of the longitudinal beam and is in a long strip shape.

In a preferred embodiment of the present invention, the first glue storage tank and the second glue storage tank have a depth of 0.7 mm.

In a preferred embodiment of the present invention, the first glue storage tank and the second glue storage tank are filled with acrylate structural glue.

In a preferred embodiment of the present invention, the cross beam and the longitudinal beam are respectively disposed inside the frame set in the transverse direction and the longitudinal direction, the bottom plate is attached inside the frame set, and the bottom plate is separated into a plurality of small areas by the structural adhesive in the first adhesive storage groove and the second adhesive storage groove on the cross beam and the longitudinal beam.

The utility model has the advantages that: the utility model discloses the connection structure who welds and glue and make up the use on the battery box body with the big bottom plate and separate into several little regions, and the stirring is welded and is glued with the structure and bond the combined use, promotes the bulk rigidity of bottom plate greatly, increases the life of battery box body, can also reduce the risk of gas leakage.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

FIG. 1 is a schematic diagram of a battery case frame assembly according to the prior art;

FIG. 2 is a schematic structural diagram of a bottom plate of the battery box of the present invention;

FIG. 3 is an exploded view of the battery case frame assembly of the present invention;

FIG. 4 is a schematic structural view of the battery box frame assembly after welding;

FIG. 5 is a schematic structural view of a battery case used by combining stir welding and gluing according to the present invention;

the parts in the drawings are numbered as follows: 200', a frame group, 100, a bottom plate, 200, a frame group, 210, a front frame, 220, a rear frame, 230, a left frame, 240, a right frame, 250, a cross beam, 260, a longitudinal beam, 270, a first glue storage groove, 280 and a second glue storage groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 2 to 5, an embodiment of the present invention includes:

a kind of stirring welds and glues the linkage that makes up and use on the battery box with gluing, including: a frame set 200 and a bottom plate 100, wherein the bottom plate 100 is arranged in the frame set 200 to form a battery box body.

The bezel set 200 includes a front bezel 210, a left bezel 230, a back bezel 220, and a right bezel 240 that are welded together:

a plurality of cross beams 250 parallel to the front frame 210 and the rear frame 220 are welded between the front frame 210 and the rear frame 220, and the size of the cross beams 250 is matched with that of the front frame 210 and the rear frame 220; a longitudinal beam 260 parallel to the left frame 230 and the right frame 240 is welded between the left frame 230 and the right frame 240, and the size of the longitudinal beam 260 is matched with that of the left frame 230 and the right frame 240.

The cross beam 250 is provided with two first glue storage grooves 270, and the left side and the right side of the cross beam 250 are respectively provided with two first glue storage grooves 270 on the cross beam 250; the longitudinal beam 260 is provided with a second glue storage tank 280, and the second glue storage tank 280 on the longitudinal beam 260 extends from the left side to the right side along the length direction of the longitudinal beam 260 and is in a long strip shape.

The depth of the first glue storage groove 270 and the second glue storage groove 280 is 0.7mm, and acrylate structural glue is adopted in the first glue storage groove 270 and the second glue storage groove 280.

The acrylate structural adhesive is a two-component structural adhesive consisting of synthetic acrylate and a modified curing agent, and both the A, B agents are 100% solid components; the high-strength epoxy resin is fast cured and high in strength, can be fixed in the initial stage within about 5 minutes, can reach 80% strength after 30 minutes, and has the maximum strength after 24 hours;

the acrylate structural adhesive is excellent in acid and alkali resistance, water and oil medium, better in high temperature resistance and aging resistance, strong in bonding force between metal objects, superior to epoxy resin in impact resistance, excellent in cold and heat resistance, and working temperature of-30-150 ℃.

Processing a first glue storage groove 270 and a second glue storage groove 280 with the depth of 0.7mm on the cross beam 250 and the longitudinal beam 260, welding the front frame 210, the left frame 230, the rear frame 220, the right frame 240, the cross beam 250 and the longitudinal beam 260 to form a frame group 200, then applying acrylic ester structural glue at the positions of the first glue storage groove 270 and the second glue storage groove 280, tightly attaching the bottom plate and the frame group by using a pressing tool at normal temperature, maintaining the pressure for 1-2 hours to completely cure the glue, and then connecting the frame group 200 and the bottom plate 100 together by stirring and welding all around.

Inside crossbeam 250 and longeron 260 located frame group 200 along transversely and vertically respectively, the laminating of bottom plate 100 is in frame group 200, and the structure through in crossbeam 250 and the longeron 260 first glue storage groove 270 and the second glue storage groove 280 is glued and is separated into a plurality of small regions with bottom plate 100, promotes the bulk rigidity of bottom plate greatly, increases battery box's life.

The frame and the bottom plate are bonded together by using the two-component acrylate structural adhesive, then the frame and the bottom plate are connected together by using stirring welding, and the rigidity of the bottom plate on the box body is enhanced by adopting the combined connection mode, so that the service life of the box body is prolonged, and meanwhile, the risk of air leakage can be reduced.

The utility model discloses the connection structure who makes up the use on the battery box with the glue is welded in the stirring beneficial effect is:

divide into several small regions with big bottom plate, stir welding and structural adhesive bond and use, promote the bulk rigidity of bottom plate greatly, increase the life of battery box, can also reduce the risk of gas leakage.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.

Claims

1. The utility model provides a connection structure that stir welding and gluing make up and use on battery box which characterized in that includes: a frame group and a bottom plate,

2. The structure of claim 1, wherein the cross member has dimensions matching those of the front and rear frames, and the longitudinal member has dimensions matching those of the left and right frames.

3. The structure of claim 1, wherein two first glue reservoirs are disposed on the cross member on each of the left and right sides of the cross member.

4. A connecting structure of stir welding and gluing to a battery case according to claim 3, wherein the second glue reservoir of the side member is elongated along the length of the side member from the left side to the right side.

5. A connection structure of stir welding and gluing on battery box according to claim 4, wherein the first glue storage groove and the second glue storage groove have a depth of 0.7 mm.

6. A connection structure of stir welding and gluing on a battery box body in combination as claimed in claim 5, wherein the first glue storage tank and the second glue storage tank are filled with acrylate structural glue.

7. The structure of claim 6, wherein the beams and the beams are disposed inside the frame assembly in the transverse and longitudinal directions, respectively, and the bottom plate is attached inside the frame assembly and divided into a plurality of small areas by the structural adhesive in the first adhesive storage groove and the second adhesive storage groove of the beams and the beams.